1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *   Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
4  *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
5  */
6 
7 #include <linux/inetdevice.h>
8 #include <net/addrconf.h>
9 #include <linux/syscalls.h>
10 #include <linux/namei.h>
11 #include <linux/statfs.h>
12 #include <linux/ethtool.h>
13 #include <linux/falloc.h>
14 #include <linux/mount.h>
15 #include <linux/filelock.h>
16 
17 #include "glob.h"
18 #include "smbfsctl.h"
19 #include "oplock.h"
20 #include "smbacl.h"
21 
22 #include "auth.h"
23 #include "asn1.h"
24 #include "connection.h"
25 #include "transport_ipc.h"
26 #include "transport_rdma.h"
27 #include "vfs.h"
28 #include "vfs_cache.h"
29 #include "misc.h"
30 
31 #include "server.h"
32 #include "smb_common.h"
33 #include "smbstatus.h"
34 #include "ksmbd_work.h"
35 #include "mgmt/user_config.h"
36 #include "mgmt/share_config.h"
37 #include "mgmt/tree_connect.h"
38 #include "mgmt/user_session.h"
39 #include "mgmt/ksmbd_ida.h"
40 #include "ndr.h"
41 
__wbuf(struct ksmbd_work * work,void ** req,void ** rsp)42 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
43 {
44 	if (work->next_smb2_rcv_hdr_off) {
45 		*req = ksmbd_req_buf_next(work);
46 		*rsp = ksmbd_resp_buf_next(work);
47 	} else {
48 		*req = smb2_get_msg(work->request_buf);
49 		*rsp = smb2_get_msg(work->response_buf);
50 	}
51 }
52 
53 #define WORK_BUFFERS(w, rq, rs)	__wbuf((w), (void **)&(rq), (void **)&(rs))
54 
55 /**
56  * check_session_id() - check for valid session id in smb header
57  * @conn:	connection instance
58  * @id:		session id from smb header
59  *
60  * Return:      1 if valid session id, otherwise 0
61  */
check_session_id(struct ksmbd_conn * conn,u64 id)62 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
63 {
64 	struct ksmbd_session *sess;
65 
66 	if (id == 0 || id == -1)
67 		return false;
68 
69 	sess = ksmbd_session_lookup_all(conn, id);
70 	if (sess)
71 		return true;
72 	pr_err("Invalid user session id: %llu\n", id);
73 	return false;
74 }
75 
lookup_chann_list(struct ksmbd_session * sess,struct ksmbd_conn * conn)76 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
77 {
78 	return xa_load(&sess->ksmbd_chann_list, (long)conn);
79 }
80 
81 /**
82  * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
83  * @work:	smb work
84  *
85  * Return:	0 if there is a tree connection matched or these are
86  *		skipable commands, otherwise error
87  */
smb2_get_ksmbd_tcon(struct ksmbd_work * work)88 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
89 {
90 	struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
91 	unsigned int cmd = le16_to_cpu(req_hdr->Command);
92 	unsigned int tree_id;
93 
94 	if (cmd == SMB2_TREE_CONNECT_HE ||
95 	    cmd ==  SMB2_CANCEL_HE ||
96 	    cmd ==  SMB2_LOGOFF_HE) {
97 		ksmbd_debug(SMB, "skip to check tree connect request\n");
98 		return 0;
99 	}
100 
101 	if (xa_empty(&work->sess->tree_conns)) {
102 		ksmbd_debug(SMB, "NO tree connected\n");
103 		return -ENOENT;
104 	}
105 
106 	tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
107 
108 	/*
109 	 * If request is not the first in Compound request,
110 	 * Just validate tree id in header with work->tcon->id.
111 	 */
112 	if (work->next_smb2_rcv_hdr_off) {
113 		if (!work->tcon) {
114 			pr_err("The first operation in the compound does not have tcon\n");
115 			return -EINVAL;
116 		}
117 		if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
118 			pr_err("tree id(%u) is different with id(%u) in first operation\n",
119 					tree_id, work->tcon->id);
120 			return -EINVAL;
121 		}
122 		return 1;
123 	}
124 
125 	work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
126 	if (!work->tcon) {
127 		pr_err("Invalid tid %d\n", tree_id);
128 		return -ENOENT;
129 	}
130 
131 	return 1;
132 }
133 
134 /**
135  * smb2_set_err_rsp() - set error response code on smb response
136  * @work:	smb work containing response buffer
137  */
smb2_set_err_rsp(struct ksmbd_work * work)138 void smb2_set_err_rsp(struct ksmbd_work *work)
139 {
140 	struct smb2_err_rsp *err_rsp;
141 
142 	if (work->next_smb2_rcv_hdr_off)
143 		err_rsp = ksmbd_resp_buf_next(work);
144 	else
145 		err_rsp = smb2_get_msg(work->response_buf);
146 
147 	if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
148 		int err;
149 
150 		err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
151 		err_rsp->ErrorContextCount = 0;
152 		err_rsp->Reserved = 0;
153 		err_rsp->ByteCount = 0;
154 		err_rsp->ErrorData[0] = 0;
155 		err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
156 					__SMB2_HEADER_STRUCTURE_SIZE +
157 						SMB2_ERROR_STRUCTURE_SIZE2);
158 		if (err)
159 			work->send_no_response = 1;
160 	}
161 }
162 
163 /**
164  * is_smb2_neg_cmd() - is it smb2 negotiation command
165  * @work:	smb work containing smb header
166  *
167  * Return:      true if smb2 negotiation command, otherwise false
168  */
is_smb2_neg_cmd(struct ksmbd_work * work)169 bool is_smb2_neg_cmd(struct ksmbd_work *work)
170 {
171 	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
172 
173 	/* is it SMB2 header ? */
174 	if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
175 		return false;
176 
177 	/* make sure it is request not response message */
178 	if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
179 		return false;
180 
181 	if (hdr->Command != SMB2_NEGOTIATE)
182 		return false;
183 
184 	return true;
185 }
186 
187 /**
188  * is_smb2_rsp() - is it smb2 response
189  * @work:	smb work containing smb response buffer
190  *
191  * Return:      true if smb2 response, otherwise false
192  */
is_smb2_rsp(struct ksmbd_work * work)193 bool is_smb2_rsp(struct ksmbd_work *work)
194 {
195 	struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
196 
197 	/* is it SMB2 header ? */
198 	if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
199 		return false;
200 
201 	/* make sure it is response not request message */
202 	if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
203 		return false;
204 
205 	return true;
206 }
207 
208 /**
209  * get_smb2_cmd_val() - get smb command code from smb header
210  * @work:	smb work containing smb request buffer
211  *
212  * Return:      smb2 request command value
213  */
get_smb2_cmd_val(struct ksmbd_work * work)214 u16 get_smb2_cmd_val(struct ksmbd_work *work)
215 {
216 	struct smb2_hdr *rcv_hdr;
217 
218 	if (work->next_smb2_rcv_hdr_off)
219 		rcv_hdr = ksmbd_req_buf_next(work);
220 	else
221 		rcv_hdr = smb2_get_msg(work->request_buf);
222 	return le16_to_cpu(rcv_hdr->Command);
223 }
224 
225 /**
226  * set_smb2_rsp_status() - set error response code on smb2 header
227  * @work:	smb work containing response buffer
228  * @err:	error response code
229  */
set_smb2_rsp_status(struct ksmbd_work * work,__le32 err)230 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
231 {
232 	struct smb2_hdr *rsp_hdr;
233 
234 	rsp_hdr = smb2_get_msg(work->response_buf);
235 	rsp_hdr->Status = err;
236 
237 	work->iov_idx = 0;
238 	work->iov_cnt = 0;
239 	work->next_smb2_rcv_hdr_off = 0;
240 	smb2_set_err_rsp(work);
241 }
242 
243 /**
244  * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
245  * @work:	smb work containing smb request buffer
246  *
247  * smb2 negotiate response is sent in reply of smb1 negotiate command for
248  * dialect auto-negotiation.
249  */
init_smb2_neg_rsp(struct ksmbd_work * work)250 int init_smb2_neg_rsp(struct ksmbd_work *work)
251 {
252 	struct smb2_hdr *rsp_hdr;
253 	struct smb2_negotiate_rsp *rsp;
254 	struct ksmbd_conn *conn = work->conn;
255 	int err;
256 
257 	rsp_hdr = smb2_get_msg(work->response_buf);
258 	memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
259 	rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
260 	rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
261 	rsp_hdr->CreditRequest = cpu_to_le16(2);
262 	rsp_hdr->Command = SMB2_NEGOTIATE;
263 	rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
264 	rsp_hdr->NextCommand = 0;
265 	rsp_hdr->MessageId = 0;
266 	rsp_hdr->Id.SyncId.ProcessId = 0;
267 	rsp_hdr->Id.SyncId.TreeId = 0;
268 	rsp_hdr->SessionId = 0;
269 	memset(rsp_hdr->Signature, 0, 16);
270 
271 	rsp = smb2_get_msg(work->response_buf);
272 
273 	WARN_ON(ksmbd_conn_good(conn));
274 
275 	rsp->StructureSize = cpu_to_le16(65);
276 	ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
277 	rsp->DialectRevision = cpu_to_le16(conn->dialect);
278 	/* Not setting conn guid rsp->ServerGUID, as it
279 	 * not used by client for identifying connection
280 	 */
281 	rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
282 	/* Default Max Message Size till SMB2.0, 64K*/
283 	rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
284 	rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
285 	rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
286 
287 	rsp->SystemTime = cpu_to_le64(ksmbd_systime());
288 	rsp->ServerStartTime = 0;
289 
290 	rsp->SecurityBufferOffset = cpu_to_le16(128);
291 	rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
292 	ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
293 		le16_to_cpu(rsp->SecurityBufferOffset));
294 	rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
295 	if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
296 		rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
297 	err = ksmbd_iov_pin_rsp(work, rsp,
298 				sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
299 	if (err)
300 		return err;
301 	conn->use_spnego = true;
302 
303 	ksmbd_conn_set_need_negotiate(conn);
304 	return 0;
305 }
306 
307 /**
308  * smb2_set_rsp_credits() - set number of credits in response buffer
309  * @work:	smb work containing smb response buffer
310  */
smb2_set_rsp_credits(struct ksmbd_work * work)311 int smb2_set_rsp_credits(struct ksmbd_work *work)
312 {
313 	struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
314 	struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
315 	struct ksmbd_conn *conn = work->conn;
316 	unsigned short credits_requested, aux_max;
317 	unsigned short credit_charge, credits_granted = 0;
318 
319 	if (work->send_no_response)
320 		return 0;
321 
322 	hdr->CreditCharge = req_hdr->CreditCharge;
323 
324 	if (conn->total_credits > conn->vals->max_credits) {
325 		hdr->CreditRequest = 0;
326 		pr_err("Total credits overflow: %d\n", conn->total_credits);
327 		return -EINVAL;
328 	}
329 
330 	credit_charge = max_t(unsigned short,
331 			      le16_to_cpu(req_hdr->CreditCharge), 1);
332 	if (credit_charge > conn->total_credits) {
333 		ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
334 			    credit_charge, conn->total_credits);
335 		return -EINVAL;
336 	}
337 
338 	conn->total_credits -= credit_charge;
339 	conn->outstanding_credits -= credit_charge;
340 	credits_requested = max_t(unsigned short,
341 				  le16_to_cpu(req_hdr->CreditRequest), 1);
342 
343 	/* according to smb2.credits smbtorture, Windows server
344 	 * 2016 or later grant up to 8192 credits at once.
345 	 *
346 	 * TODO: Need to adjuct CreditRequest value according to
347 	 * current cpu load
348 	 */
349 	if (hdr->Command == SMB2_NEGOTIATE)
350 		aux_max = 1;
351 	else
352 		aux_max = conn->vals->max_credits - conn->total_credits;
353 	credits_granted = min_t(unsigned short, credits_requested, aux_max);
354 
355 	conn->total_credits += credits_granted;
356 	work->credits_granted += credits_granted;
357 
358 	if (!req_hdr->NextCommand) {
359 		/* Update CreditRequest in last request */
360 		hdr->CreditRequest = cpu_to_le16(work->credits_granted);
361 	}
362 	ksmbd_debug(SMB,
363 		    "credits: requested[%d] granted[%d] total_granted[%d]\n",
364 		    credits_requested, credits_granted,
365 		    conn->total_credits);
366 	return 0;
367 }
368 
369 /**
370  * init_chained_smb2_rsp() - initialize smb2 chained response
371  * @work:	smb work containing smb response buffer
372  */
init_chained_smb2_rsp(struct ksmbd_work * work)373 static void init_chained_smb2_rsp(struct ksmbd_work *work)
374 {
375 	struct smb2_hdr *req = ksmbd_req_buf_next(work);
376 	struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
377 	struct smb2_hdr *rsp_hdr;
378 	struct smb2_hdr *rcv_hdr;
379 	int next_hdr_offset = 0;
380 	int len, new_len;
381 
382 	/* Len of this response = updated RFC len - offset of previous cmd
383 	 * in the compound rsp
384 	 */
385 
386 	/* Storing the current local FID which may be needed by subsequent
387 	 * command in the compound request
388 	 */
389 	if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
390 		work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
391 		work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
392 		work->compound_sid = le64_to_cpu(rsp->SessionId);
393 	}
394 
395 	len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
396 	next_hdr_offset = le32_to_cpu(req->NextCommand);
397 
398 	new_len = ALIGN(len, 8);
399 	work->iov[work->iov_idx].iov_len += (new_len - len);
400 	inc_rfc1001_len(work->response_buf, new_len - len);
401 	rsp->NextCommand = cpu_to_le32(new_len);
402 
403 	work->next_smb2_rcv_hdr_off += next_hdr_offset;
404 	work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
405 	work->next_smb2_rsp_hdr_off += new_len;
406 	ksmbd_debug(SMB,
407 		    "Compound req new_len = %d rcv off = %d rsp off = %d\n",
408 		    new_len, work->next_smb2_rcv_hdr_off,
409 		    work->next_smb2_rsp_hdr_off);
410 
411 	rsp_hdr = ksmbd_resp_buf_next(work);
412 	rcv_hdr = ksmbd_req_buf_next(work);
413 
414 	if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
415 		ksmbd_debug(SMB, "related flag should be set\n");
416 		work->compound_fid = KSMBD_NO_FID;
417 		work->compound_pfid = KSMBD_NO_FID;
418 	}
419 	memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
420 	rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
421 	rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
422 	rsp_hdr->Command = rcv_hdr->Command;
423 
424 	/*
425 	 * Message is response. We don't grant oplock yet.
426 	 */
427 	rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
428 				SMB2_FLAGS_RELATED_OPERATIONS);
429 	rsp_hdr->NextCommand = 0;
430 	rsp_hdr->MessageId = rcv_hdr->MessageId;
431 	rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
432 	rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
433 	rsp_hdr->SessionId = rcv_hdr->SessionId;
434 	memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
435 }
436 
437 /**
438  * is_chained_smb2_message() - check for chained command
439  * @work:	smb work containing smb request buffer
440  *
441  * Return:      true if chained request, otherwise false
442  */
is_chained_smb2_message(struct ksmbd_work * work)443 bool is_chained_smb2_message(struct ksmbd_work *work)
444 {
445 	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
446 	unsigned int len, next_cmd;
447 
448 	if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
449 		return false;
450 
451 	hdr = ksmbd_req_buf_next(work);
452 	next_cmd = le32_to_cpu(hdr->NextCommand);
453 	if (next_cmd > 0) {
454 		if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
455 			__SMB2_HEADER_STRUCTURE_SIZE >
456 		    get_rfc1002_len(work->request_buf)) {
457 			pr_err("next command(%u) offset exceeds smb msg size\n",
458 			       next_cmd);
459 			return false;
460 		}
461 
462 		if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
463 		    work->response_sz) {
464 			pr_err("next response offset exceeds response buffer size\n");
465 			return false;
466 		}
467 
468 		ksmbd_debug(SMB, "got SMB2 chained command\n");
469 		init_chained_smb2_rsp(work);
470 		return true;
471 	} else if (work->next_smb2_rcv_hdr_off) {
472 		/*
473 		 * This is last request in chained command,
474 		 * align response to 8 byte
475 		 */
476 		len = ALIGN(get_rfc1002_len(work->response_buf), 8);
477 		len = len - get_rfc1002_len(work->response_buf);
478 		if (len) {
479 			ksmbd_debug(SMB, "padding len %u\n", len);
480 			work->iov[work->iov_idx].iov_len += len;
481 			inc_rfc1001_len(work->response_buf, len);
482 		}
483 		work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
484 	}
485 	return false;
486 }
487 
488 /**
489  * init_smb2_rsp_hdr() - initialize smb2 response
490  * @work:	smb work containing smb request buffer
491  *
492  * Return:      0
493  */
init_smb2_rsp_hdr(struct ksmbd_work * work)494 int init_smb2_rsp_hdr(struct ksmbd_work *work)
495 {
496 	struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
497 	struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
498 
499 	memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
500 	rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
501 	rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
502 	rsp_hdr->Command = rcv_hdr->Command;
503 
504 	/*
505 	 * Message is response. We don't grant oplock yet.
506 	 */
507 	rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
508 	rsp_hdr->NextCommand = 0;
509 	rsp_hdr->MessageId = rcv_hdr->MessageId;
510 	rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
511 	rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
512 	rsp_hdr->SessionId = rcv_hdr->SessionId;
513 	memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
514 
515 	return 0;
516 }
517 
518 /**
519  * smb2_allocate_rsp_buf() - allocate smb2 response buffer
520  * @work:	smb work containing smb request buffer
521  *
522  * Return:      0 on success, otherwise -ENOMEM
523  */
smb2_allocate_rsp_buf(struct ksmbd_work * work)524 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
525 {
526 	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
527 	size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
528 	size_t large_sz = small_sz + work->conn->vals->max_trans_size;
529 	size_t sz = small_sz;
530 	int cmd = le16_to_cpu(hdr->Command);
531 
532 	if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
533 		sz = large_sz;
534 
535 	if (cmd == SMB2_QUERY_INFO_HE) {
536 		struct smb2_query_info_req *req;
537 
538 		req = smb2_get_msg(work->request_buf);
539 		if ((req->InfoType == SMB2_O_INFO_FILE &&
540 		     (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
541 		     req->FileInfoClass == FILE_ALL_INFORMATION)) ||
542 		    req->InfoType == SMB2_O_INFO_SECURITY)
543 			sz = large_sz;
544 	}
545 
546 	/* allocate large response buf for chained commands */
547 	if (le32_to_cpu(hdr->NextCommand) > 0)
548 		sz = large_sz;
549 
550 	work->response_buf = kvzalloc(sz, GFP_KERNEL);
551 	if (!work->response_buf)
552 		return -ENOMEM;
553 
554 	work->response_sz = sz;
555 	return 0;
556 }
557 
558 /**
559  * smb2_check_user_session() - check for valid session for a user
560  * @work:	smb work containing smb request buffer
561  *
562  * Return:      0 on success, otherwise error
563  */
smb2_check_user_session(struct ksmbd_work * work)564 int smb2_check_user_session(struct ksmbd_work *work)
565 {
566 	struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
567 	struct ksmbd_conn *conn = work->conn;
568 	unsigned int cmd = le16_to_cpu(req_hdr->Command);
569 	unsigned long long sess_id;
570 
571 	/*
572 	 * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
573 	 * require a session id, so no need to validate user session's for
574 	 * these commands.
575 	 */
576 	if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
577 	    cmd == SMB2_SESSION_SETUP_HE)
578 		return 0;
579 
580 	if (!ksmbd_conn_good(conn))
581 		return -EIO;
582 
583 	sess_id = le64_to_cpu(req_hdr->SessionId);
584 
585 	/*
586 	 * If request is not the first in Compound request,
587 	 * Just validate session id in header with work->sess->id.
588 	 */
589 	if (work->next_smb2_rcv_hdr_off) {
590 		if (!work->sess) {
591 			pr_err("The first operation in the compound does not have sess\n");
592 			return -EINVAL;
593 		}
594 		if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
595 			pr_err("session id(%llu) is different with the first operation(%lld)\n",
596 					sess_id, work->sess->id);
597 			return -EINVAL;
598 		}
599 		return 1;
600 	}
601 
602 	/* Check for validity of user session */
603 	work->sess = ksmbd_session_lookup_all(conn, sess_id);
604 	if (work->sess)
605 		return 1;
606 	ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
607 	return -ENOENT;
608 }
609 
destroy_previous_session(struct ksmbd_conn * conn,struct ksmbd_user * user,u64 id)610 static void destroy_previous_session(struct ksmbd_conn *conn,
611 				     struct ksmbd_user *user, u64 id)
612 {
613 	struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
614 	struct ksmbd_user *prev_user;
615 	struct channel *chann;
616 	long index;
617 
618 	if (!prev_sess)
619 		return;
620 
621 	prev_user = prev_sess->user;
622 
623 	if (!prev_user ||
624 	    strcmp(user->name, prev_user->name) ||
625 	    user->passkey_sz != prev_user->passkey_sz ||
626 	    memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
627 		return;
628 
629 	prev_sess->state = SMB2_SESSION_EXPIRED;
630 	xa_for_each(&prev_sess->ksmbd_chann_list, index, chann)
631 		ksmbd_conn_set_exiting(chann->conn);
632 }
633 
634 /**
635  * smb2_get_name() - get filename string from on the wire smb format
636  * @src:	source buffer
637  * @maxlen:	maxlen of source string
638  * @local_nls:	nls_table pointer
639  *
640  * Return:      matching converted filename on success, otherwise error ptr
641  */
642 static char *
smb2_get_name(const char * src,const int maxlen,struct nls_table * local_nls)643 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
644 {
645 	char *name;
646 
647 	name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
648 	if (IS_ERR(name)) {
649 		pr_err("failed to get name %ld\n", PTR_ERR(name));
650 		return name;
651 	}
652 
653 	ksmbd_conv_path_to_unix(name);
654 	ksmbd_strip_last_slash(name);
655 	return name;
656 }
657 
setup_async_work(struct ksmbd_work * work,void (* fn)(void **),void ** arg)658 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
659 {
660 	struct ksmbd_conn *conn = work->conn;
661 	int id;
662 
663 	id = ksmbd_acquire_async_msg_id(&conn->async_ida);
664 	if (id < 0) {
665 		pr_err("Failed to alloc async message id\n");
666 		return id;
667 	}
668 	work->asynchronous = true;
669 	work->async_id = id;
670 
671 	ksmbd_debug(SMB,
672 		    "Send interim Response to inform async request id : %d\n",
673 		    work->async_id);
674 
675 	work->cancel_fn = fn;
676 	work->cancel_argv = arg;
677 
678 	if (list_empty(&work->async_request_entry)) {
679 		spin_lock(&conn->request_lock);
680 		list_add_tail(&work->async_request_entry, &conn->async_requests);
681 		spin_unlock(&conn->request_lock);
682 	}
683 
684 	return 0;
685 }
686 
release_async_work(struct ksmbd_work * work)687 void release_async_work(struct ksmbd_work *work)
688 {
689 	struct ksmbd_conn *conn = work->conn;
690 
691 	spin_lock(&conn->request_lock);
692 	list_del_init(&work->async_request_entry);
693 	spin_unlock(&conn->request_lock);
694 
695 	work->asynchronous = 0;
696 	work->cancel_fn = NULL;
697 	kfree(work->cancel_argv);
698 	work->cancel_argv = NULL;
699 	if (work->async_id) {
700 		ksmbd_release_id(&conn->async_ida, work->async_id);
701 		work->async_id = 0;
702 	}
703 }
704 
smb2_send_interim_resp(struct ksmbd_work * work,__le32 status)705 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
706 {
707 	struct smb2_hdr *rsp_hdr;
708 	struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
709 
710 	if (allocate_interim_rsp_buf(in_work)) {
711 		pr_err("smb_allocate_rsp_buf failed!\n");
712 		ksmbd_free_work_struct(in_work);
713 		return;
714 	}
715 
716 	in_work->conn = work->conn;
717 	memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
718 	       __SMB2_HEADER_STRUCTURE_SIZE);
719 
720 	rsp_hdr = smb2_get_msg(in_work->response_buf);
721 	rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
722 	rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
723 	smb2_set_err_rsp(in_work);
724 	rsp_hdr->Status = status;
725 
726 	ksmbd_conn_write(in_work);
727 	ksmbd_free_work_struct(in_work);
728 }
729 
smb2_get_reparse_tag_special_file(umode_t mode)730 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
731 {
732 	if (S_ISDIR(mode) || S_ISREG(mode))
733 		return 0;
734 
735 	if (S_ISLNK(mode))
736 		return IO_REPARSE_TAG_LX_SYMLINK_LE;
737 	else if (S_ISFIFO(mode))
738 		return IO_REPARSE_TAG_LX_FIFO_LE;
739 	else if (S_ISSOCK(mode))
740 		return IO_REPARSE_TAG_AF_UNIX_LE;
741 	else if (S_ISCHR(mode))
742 		return IO_REPARSE_TAG_LX_CHR_LE;
743 	else if (S_ISBLK(mode))
744 		return IO_REPARSE_TAG_LX_BLK_LE;
745 
746 	return 0;
747 }
748 
749 /**
750  * smb2_get_dos_mode() - get file mode in dos format from unix mode
751  * @stat:	kstat containing file mode
752  * @attribute:	attribute flags
753  *
754  * Return:      converted dos mode
755  */
smb2_get_dos_mode(struct kstat * stat,int attribute)756 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
757 {
758 	int attr = 0;
759 
760 	if (S_ISDIR(stat->mode)) {
761 		attr = FILE_ATTRIBUTE_DIRECTORY |
762 			(attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
763 	} else {
764 		attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
765 		attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
766 		if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
767 				FILE_SUPPORTS_SPARSE_FILES))
768 			attr |= FILE_ATTRIBUTE_SPARSE_FILE;
769 
770 		if (smb2_get_reparse_tag_special_file(stat->mode))
771 			attr |= FILE_ATTRIBUTE_REPARSE_POINT;
772 	}
773 
774 	return attr;
775 }
776 
build_preauth_ctxt(struct smb2_preauth_neg_context * pneg_ctxt,__le16 hash_id)777 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
778 			       __le16 hash_id)
779 {
780 	pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
781 	pneg_ctxt->DataLength = cpu_to_le16(38);
782 	pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
783 	pneg_ctxt->Reserved = cpu_to_le32(0);
784 	pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
785 	get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
786 	pneg_ctxt->HashAlgorithms = hash_id;
787 }
788 
build_encrypt_ctxt(struct smb2_encryption_neg_context * pneg_ctxt,__le16 cipher_type)789 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
790 			       __le16 cipher_type)
791 {
792 	pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
793 	pneg_ctxt->DataLength = cpu_to_le16(4);
794 	pneg_ctxt->Reserved = cpu_to_le32(0);
795 	pneg_ctxt->CipherCount = cpu_to_le16(1);
796 	pneg_ctxt->Ciphers[0] = cipher_type;
797 }
798 
build_sign_cap_ctxt(struct smb2_signing_capabilities * pneg_ctxt,__le16 sign_algo)799 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
800 				__le16 sign_algo)
801 {
802 	pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
803 	pneg_ctxt->DataLength =
804 		cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
805 			- sizeof(struct smb2_neg_context));
806 	pneg_ctxt->Reserved = cpu_to_le32(0);
807 	pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
808 	pneg_ctxt->SigningAlgorithms[0] = sign_algo;
809 }
810 
build_posix_ctxt(struct smb2_posix_neg_context * pneg_ctxt)811 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
812 {
813 	pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
814 	pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
815 	/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
816 	pneg_ctxt->Name[0] = 0x93;
817 	pneg_ctxt->Name[1] = 0xAD;
818 	pneg_ctxt->Name[2] = 0x25;
819 	pneg_ctxt->Name[3] = 0x50;
820 	pneg_ctxt->Name[4] = 0x9C;
821 	pneg_ctxt->Name[5] = 0xB4;
822 	pneg_ctxt->Name[6] = 0x11;
823 	pneg_ctxt->Name[7] = 0xE7;
824 	pneg_ctxt->Name[8] = 0xB4;
825 	pneg_ctxt->Name[9] = 0x23;
826 	pneg_ctxt->Name[10] = 0x83;
827 	pneg_ctxt->Name[11] = 0xDE;
828 	pneg_ctxt->Name[12] = 0x96;
829 	pneg_ctxt->Name[13] = 0x8B;
830 	pneg_ctxt->Name[14] = 0xCD;
831 	pneg_ctxt->Name[15] = 0x7C;
832 }
833 
assemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_rsp * rsp)834 static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
835 				  struct smb2_negotiate_rsp *rsp)
836 {
837 	char * const pneg_ctxt = (char *)rsp +
838 			le32_to_cpu(rsp->NegotiateContextOffset);
839 	int neg_ctxt_cnt = 1;
840 	int ctxt_size;
841 
842 	ksmbd_debug(SMB,
843 		    "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
844 	build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
845 			   conn->preauth_info->Preauth_HashId);
846 	ctxt_size = sizeof(struct smb2_preauth_neg_context);
847 
848 	if (conn->cipher_type) {
849 		/* Round to 8 byte boundary */
850 		ctxt_size = round_up(ctxt_size, 8);
851 		ksmbd_debug(SMB,
852 			    "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
853 		build_encrypt_ctxt((struct smb2_encryption_neg_context *)
854 				   (pneg_ctxt + ctxt_size),
855 				   conn->cipher_type);
856 		neg_ctxt_cnt++;
857 		ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
858 	}
859 
860 	/* compression context not yet supported */
861 	WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
862 
863 	if (conn->posix_ext_supported) {
864 		ctxt_size = round_up(ctxt_size, 8);
865 		ksmbd_debug(SMB,
866 			    "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
867 		build_posix_ctxt((struct smb2_posix_neg_context *)
868 				 (pneg_ctxt + ctxt_size));
869 		neg_ctxt_cnt++;
870 		ctxt_size += sizeof(struct smb2_posix_neg_context);
871 	}
872 
873 	if (conn->signing_negotiated) {
874 		ctxt_size = round_up(ctxt_size, 8);
875 		ksmbd_debug(SMB,
876 			    "assemble SMB2_SIGNING_CAPABILITIES context\n");
877 		build_sign_cap_ctxt((struct smb2_signing_capabilities *)
878 				    (pneg_ctxt + ctxt_size),
879 				    conn->signing_algorithm);
880 		neg_ctxt_cnt++;
881 		ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
882 	}
883 
884 	rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
885 	return ctxt_size + AUTH_GSS_PADDING;
886 }
887 
decode_preauth_ctxt(struct ksmbd_conn * conn,struct smb2_preauth_neg_context * pneg_ctxt,int ctxt_len)888 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
889 				  struct smb2_preauth_neg_context *pneg_ctxt,
890 				  int ctxt_len)
891 {
892 	/*
893 	 * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
894 	 * which may not be present. Only check for used HashAlgorithms[1].
895 	 */
896 	if (ctxt_len <
897 	    sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
898 		return STATUS_INVALID_PARAMETER;
899 
900 	if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
901 		return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
902 
903 	conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
904 	return STATUS_SUCCESS;
905 }
906 
decode_encrypt_ctxt(struct ksmbd_conn * conn,struct smb2_encryption_neg_context * pneg_ctxt,int ctxt_len)907 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
908 				struct smb2_encryption_neg_context *pneg_ctxt,
909 				int ctxt_len)
910 {
911 	int cph_cnt;
912 	int i, cphs_size;
913 
914 	if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
915 		pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
916 		return;
917 	}
918 
919 	conn->cipher_type = 0;
920 
921 	cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
922 	cphs_size = cph_cnt * sizeof(__le16);
923 
924 	if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
925 	    ctxt_len) {
926 		pr_err("Invalid cipher count(%d)\n", cph_cnt);
927 		return;
928 	}
929 
930 	if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
931 		return;
932 
933 	for (i = 0; i < cph_cnt; i++) {
934 		if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
935 		    pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
936 		    pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
937 		    pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
938 			ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
939 				    pneg_ctxt->Ciphers[i]);
940 			conn->cipher_type = pneg_ctxt->Ciphers[i];
941 			break;
942 		}
943 	}
944 }
945 
946 /**
947  * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
948  * @conn:	smb connection
949  *
950  * Return:	true if connection should be encrypted, else false
951  */
smb3_encryption_negotiated(struct ksmbd_conn * conn)952 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
953 {
954 	if (!conn->ops->generate_encryptionkey)
955 		return false;
956 
957 	/*
958 	 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
959 	 * SMB 3.1.1 uses the cipher_type field.
960 	 */
961 	return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
962 	    conn->cipher_type;
963 }
964 
decode_compress_ctxt(struct ksmbd_conn * conn,struct smb2_compression_capabilities_context * pneg_ctxt)965 static void decode_compress_ctxt(struct ksmbd_conn *conn,
966 				 struct smb2_compression_capabilities_context *pneg_ctxt)
967 {
968 	conn->compress_algorithm = SMB3_COMPRESS_NONE;
969 }
970 
decode_sign_cap_ctxt(struct ksmbd_conn * conn,struct smb2_signing_capabilities * pneg_ctxt,int ctxt_len)971 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
972 				 struct smb2_signing_capabilities *pneg_ctxt,
973 				 int ctxt_len)
974 {
975 	int sign_algo_cnt;
976 	int i, sign_alos_size;
977 
978 	if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
979 		pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
980 		return;
981 	}
982 
983 	conn->signing_negotiated = false;
984 	sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
985 	sign_alos_size = sign_algo_cnt * sizeof(__le16);
986 
987 	if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
988 	    ctxt_len) {
989 		pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
990 		return;
991 	}
992 
993 	for (i = 0; i < sign_algo_cnt; i++) {
994 		if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
995 		    pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
996 			ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
997 				    pneg_ctxt->SigningAlgorithms[i]);
998 			conn->signing_negotiated = true;
999 			conn->signing_algorithm =
1000 				pneg_ctxt->SigningAlgorithms[i];
1001 			break;
1002 		}
1003 	}
1004 }
1005 
deassemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_req * req,unsigned int len_of_smb)1006 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
1007 				      struct smb2_negotiate_req *req,
1008 				      unsigned int len_of_smb)
1009 {
1010 	/* +4 is to account for the RFC1001 len field */
1011 	struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
1012 	int i = 0, len_of_ctxts;
1013 	unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
1014 	unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
1015 	__le32 status = STATUS_INVALID_PARAMETER;
1016 
1017 	ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
1018 	if (len_of_smb <= offset) {
1019 		ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
1020 		return status;
1021 	}
1022 
1023 	len_of_ctxts = len_of_smb - offset;
1024 
1025 	while (i++ < neg_ctxt_cnt) {
1026 		int clen, ctxt_len;
1027 
1028 		if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
1029 			break;
1030 
1031 		pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1032 		clen = le16_to_cpu(pctx->DataLength);
1033 		ctxt_len = clen + sizeof(struct smb2_neg_context);
1034 
1035 		if (ctxt_len > len_of_ctxts)
1036 			break;
1037 
1038 		if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1039 			ksmbd_debug(SMB,
1040 				    "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1041 			if (conn->preauth_info->Preauth_HashId)
1042 				break;
1043 
1044 			status = decode_preauth_ctxt(conn,
1045 						     (struct smb2_preauth_neg_context *)pctx,
1046 						     ctxt_len);
1047 			if (status != STATUS_SUCCESS)
1048 				break;
1049 		} else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1050 			ksmbd_debug(SMB,
1051 				    "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1052 			if (conn->cipher_type)
1053 				break;
1054 
1055 			decode_encrypt_ctxt(conn,
1056 					    (struct smb2_encryption_neg_context *)pctx,
1057 					    ctxt_len);
1058 		} else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1059 			ksmbd_debug(SMB,
1060 				    "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1061 			if (conn->compress_algorithm)
1062 				break;
1063 
1064 			decode_compress_ctxt(conn,
1065 					     (struct smb2_compression_capabilities_context *)pctx);
1066 		} else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1067 			ksmbd_debug(SMB,
1068 				    "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1069 		} else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1070 			ksmbd_debug(SMB,
1071 				    "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1072 			conn->posix_ext_supported = true;
1073 		} else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1074 			ksmbd_debug(SMB,
1075 				    "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1076 
1077 			decode_sign_cap_ctxt(conn,
1078 					     (struct smb2_signing_capabilities *)pctx,
1079 					     ctxt_len);
1080 		}
1081 
1082 		/* offsets must be 8 byte aligned */
1083 		offset = (ctxt_len + 7) & ~0x7;
1084 		len_of_ctxts -= offset;
1085 	}
1086 	return status;
1087 }
1088 
1089 /**
1090  * smb2_handle_negotiate() - handler for smb2 negotiate command
1091  * @work:	smb work containing smb request buffer
1092  *
1093  * Return:      0
1094  */
smb2_handle_negotiate(struct ksmbd_work * work)1095 int smb2_handle_negotiate(struct ksmbd_work *work)
1096 {
1097 	struct ksmbd_conn *conn = work->conn;
1098 	struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1099 	struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1100 	int rc = 0;
1101 	unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
1102 	__le32 status;
1103 
1104 	ksmbd_debug(SMB, "Received negotiate request\n");
1105 	conn->need_neg = false;
1106 	if (ksmbd_conn_good(conn)) {
1107 		pr_err("conn->tcp_status is already in CifsGood State\n");
1108 		work->send_no_response = 1;
1109 		return rc;
1110 	}
1111 
1112 	smb2_buf_len = get_rfc1002_len(work->request_buf);
1113 	smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1114 	if (smb2_neg_size > smb2_buf_len) {
1115 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1116 		rc = -EINVAL;
1117 		goto err_out;
1118 	}
1119 
1120 	if (req->DialectCount == 0) {
1121 		pr_err("malformed packet\n");
1122 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1123 		rc = -EINVAL;
1124 		goto err_out;
1125 	}
1126 
1127 	if (conn->dialect == SMB311_PROT_ID) {
1128 		unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1129 
1130 		if (smb2_buf_len < nego_ctxt_off) {
1131 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1132 			rc = -EINVAL;
1133 			goto err_out;
1134 		}
1135 
1136 		if (smb2_neg_size > nego_ctxt_off) {
1137 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1138 			rc = -EINVAL;
1139 			goto err_out;
1140 		}
1141 
1142 		if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1143 		    nego_ctxt_off) {
1144 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1145 			rc = -EINVAL;
1146 			goto err_out;
1147 		}
1148 	} else {
1149 		if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1150 		    smb2_buf_len) {
1151 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1152 			rc = -EINVAL;
1153 			goto err_out;
1154 		}
1155 	}
1156 
1157 	conn->cli_cap = le32_to_cpu(req->Capabilities);
1158 	switch (conn->dialect) {
1159 	case SMB311_PROT_ID:
1160 		conn->preauth_info =
1161 			kzalloc(sizeof(struct preauth_integrity_info),
1162 				GFP_KERNEL);
1163 		if (!conn->preauth_info) {
1164 			rc = -ENOMEM;
1165 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1166 			goto err_out;
1167 		}
1168 
1169 		status = deassemble_neg_contexts(conn, req,
1170 						 get_rfc1002_len(work->request_buf));
1171 		if (status != STATUS_SUCCESS) {
1172 			pr_err("deassemble_neg_contexts error(0x%x)\n",
1173 			       status);
1174 			rsp->hdr.Status = status;
1175 			rc = -EINVAL;
1176 			kfree(conn->preauth_info);
1177 			conn->preauth_info = NULL;
1178 			goto err_out;
1179 		}
1180 
1181 		rc = init_smb3_11_server(conn);
1182 		if (rc < 0) {
1183 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1184 			kfree(conn->preauth_info);
1185 			conn->preauth_info = NULL;
1186 			goto err_out;
1187 		}
1188 
1189 		ksmbd_gen_preauth_integrity_hash(conn,
1190 						 work->request_buf,
1191 						 conn->preauth_info->Preauth_HashValue);
1192 		rsp->NegotiateContextOffset =
1193 				cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1194 		neg_ctxt_len = assemble_neg_contexts(conn, rsp);
1195 		break;
1196 	case SMB302_PROT_ID:
1197 		init_smb3_02_server(conn);
1198 		break;
1199 	case SMB30_PROT_ID:
1200 		init_smb3_0_server(conn);
1201 		break;
1202 	case SMB21_PROT_ID:
1203 		init_smb2_1_server(conn);
1204 		break;
1205 	case SMB2X_PROT_ID:
1206 	case BAD_PROT_ID:
1207 	default:
1208 		ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1209 			    conn->dialect);
1210 		rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1211 		rc = -EINVAL;
1212 		goto err_out;
1213 	}
1214 	rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1215 
1216 	/* For stats */
1217 	conn->connection_type = conn->dialect;
1218 
1219 	rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1220 	rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1221 	rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1222 
1223 	memcpy(conn->ClientGUID, req->ClientGUID,
1224 			SMB2_CLIENT_GUID_SIZE);
1225 	conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1226 
1227 	rsp->StructureSize = cpu_to_le16(65);
1228 	rsp->DialectRevision = cpu_to_le16(conn->dialect);
1229 	/* Not setting conn guid rsp->ServerGUID, as it
1230 	 * not used by client for identifying server
1231 	 */
1232 	memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1233 
1234 	rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1235 	rsp->ServerStartTime = 0;
1236 	ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1237 		    le32_to_cpu(rsp->NegotiateContextOffset),
1238 		    le16_to_cpu(rsp->NegotiateContextCount));
1239 
1240 	rsp->SecurityBufferOffset = cpu_to_le16(128);
1241 	rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1242 	ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1243 				  le16_to_cpu(rsp->SecurityBufferOffset));
1244 
1245 	rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1246 	conn->use_spnego = true;
1247 
1248 	if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1249 	     server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1250 	    req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1251 		conn->sign = true;
1252 	else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1253 		server_conf.enforced_signing = true;
1254 		rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1255 		conn->sign = true;
1256 	}
1257 
1258 	conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1259 	ksmbd_conn_set_need_negotiate(conn);
1260 
1261 err_out:
1262 	if (rc)
1263 		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1264 
1265 	if (!rc)
1266 		rc = ksmbd_iov_pin_rsp(work, rsp,
1267 				       sizeof(struct smb2_negotiate_rsp) +
1268 					AUTH_GSS_LENGTH + neg_ctxt_len);
1269 	if (rc < 0)
1270 		smb2_set_err_rsp(work);
1271 	return rc;
1272 }
1273 
alloc_preauth_hash(struct ksmbd_session * sess,struct ksmbd_conn * conn)1274 static int alloc_preauth_hash(struct ksmbd_session *sess,
1275 			      struct ksmbd_conn *conn)
1276 {
1277 	if (sess->Preauth_HashValue)
1278 		return 0;
1279 
1280 	sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1281 					  PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1282 	if (!sess->Preauth_HashValue)
1283 		return -ENOMEM;
1284 
1285 	return 0;
1286 }
1287 
generate_preauth_hash(struct ksmbd_work * work)1288 static int generate_preauth_hash(struct ksmbd_work *work)
1289 {
1290 	struct ksmbd_conn *conn = work->conn;
1291 	struct ksmbd_session *sess = work->sess;
1292 	u8 *preauth_hash;
1293 
1294 	if (conn->dialect != SMB311_PROT_ID)
1295 		return 0;
1296 
1297 	if (conn->binding) {
1298 		struct preauth_session *preauth_sess;
1299 
1300 		preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1301 		if (!preauth_sess) {
1302 			preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1303 			if (!preauth_sess)
1304 				return -ENOMEM;
1305 		}
1306 
1307 		preauth_hash = preauth_sess->Preauth_HashValue;
1308 	} else {
1309 		if (!sess->Preauth_HashValue)
1310 			if (alloc_preauth_hash(sess, conn))
1311 				return -ENOMEM;
1312 		preauth_hash = sess->Preauth_HashValue;
1313 	}
1314 
1315 	ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1316 	return 0;
1317 }
1318 
decode_negotiation_token(struct ksmbd_conn * conn,struct negotiate_message * negblob,size_t sz)1319 static int decode_negotiation_token(struct ksmbd_conn *conn,
1320 				    struct negotiate_message *negblob,
1321 				    size_t sz)
1322 {
1323 	if (!conn->use_spnego)
1324 		return -EINVAL;
1325 
1326 	if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1327 		if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1328 			conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1329 			conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1330 			conn->use_spnego = false;
1331 		}
1332 	}
1333 	return 0;
1334 }
1335 
ntlm_negotiate(struct ksmbd_work * work,struct negotiate_message * negblob,size_t negblob_len,struct smb2_sess_setup_rsp * rsp)1336 static int ntlm_negotiate(struct ksmbd_work *work,
1337 			  struct negotiate_message *negblob,
1338 			  size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
1339 {
1340 	struct challenge_message *chgblob;
1341 	unsigned char *spnego_blob = NULL;
1342 	u16 spnego_blob_len;
1343 	char *neg_blob;
1344 	int sz, rc;
1345 
1346 	ksmbd_debug(SMB, "negotiate phase\n");
1347 	rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1348 	if (rc)
1349 		return rc;
1350 
1351 	sz = le16_to_cpu(rsp->SecurityBufferOffset);
1352 	chgblob =
1353 		(struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1354 	memset(chgblob, 0, sizeof(struct challenge_message));
1355 
1356 	if (!work->conn->use_spnego) {
1357 		sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1358 		if (sz < 0)
1359 			return -ENOMEM;
1360 
1361 		rsp->SecurityBufferLength = cpu_to_le16(sz);
1362 		return 0;
1363 	}
1364 
1365 	sz = sizeof(struct challenge_message);
1366 	sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1367 
1368 	neg_blob = kzalloc(sz, GFP_KERNEL);
1369 	if (!neg_blob)
1370 		return -ENOMEM;
1371 
1372 	chgblob = (struct challenge_message *)neg_blob;
1373 	sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1374 	if (sz < 0) {
1375 		rc = -ENOMEM;
1376 		goto out;
1377 	}
1378 
1379 	rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1380 					   neg_blob, sz);
1381 	if (rc) {
1382 		rc = -ENOMEM;
1383 		goto out;
1384 	}
1385 
1386 	sz = le16_to_cpu(rsp->SecurityBufferOffset);
1387 	memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1388 	rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1389 
1390 out:
1391 	kfree(spnego_blob);
1392 	kfree(neg_blob);
1393 	return rc;
1394 }
1395 
user_authblob(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1396 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1397 						  struct smb2_sess_setup_req *req)
1398 {
1399 	int sz;
1400 
1401 	if (conn->use_spnego && conn->mechToken)
1402 		return (struct authenticate_message *)conn->mechToken;
1403 
1404 	sz = le16_to_cpu(req->SecurityBufferOffset);
1405 	return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1406 					       + sz);
1407 }
1408 
session_user(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1409 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1410 				       struct smb2_sess_setup_req *req)
1411 {
1412 	struct authenticate_message *authblob;
1413 	struct ksmbd_user *user;
1414 	char *name;
1415 	unsigned int name_off, name_len, secbuf_len;
1416 
1417 	if (conn->use_spnego && conn->mechToken)
1418 		secbuf_len = conn->mechTokenLen;
1419 	else
1420 		secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1421 	if (secbuf_len < sizeof(struct authenticate_message)) {
1422 		ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1423 		return NULL;
1424 	}
1425 	authblob = user_authblob(conn, req);
1426 	name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1427 	name_len = le16_to_cpu(authblob->UserName.Length);
1428 
1429 	if (secbuf_len < (u64)name_off + name_len)
1430 		return NULL;
1431 
1432 	name = smb_strndup_from_utf16((const char *)authblob + name_off,
1433 				      name_len,
1434 				      true,
1435 				      conn->local_nls);
1436 	if (IS_ERR(name)) {
1437 		pr_err("cannot allocate memory\n");
1438 		return NULL;
1439 	}
1440 
1441 	ksmbd_debug(SMB, "session setup request for user %s\n", name);
1442 	user = ksmbd_login_user(name);
1443 	kfree(name);
1444 	return user;
1445 }
1446 
ntlm_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1447 static int ntlm_authenticate(struct ksmbd_work *work,
1448 			     struct smb2_sess_setup_req *req,
1449 			     struct smb2_sess_setup_rsp *rsp)
1450 {
1451 	struct ksmbd_conn *conn = work->conn;
1452 	struct ksmbd_session *sess = work->sess;
1453 	struct channel *chann = NULL;
1454 	struct ksmbd_user *user;
1455 	u64 prev_id;
1456 	int sz, rc;
1457 
1458 	ksmbd_debug(SMB, "authenticate phase\n");
1459 	if (conn->use_spnego) {
1460 		unsigned char *spnego_blob;
1461 		u16 spnego_blob_len;
1462 
1463 		rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1464 						    &spnego_blob_len,
1465 						    0);
1466 		if (rc)
1467 			return -ENOMEM;
1468 
1469 		sz = le16_to_cpu(rsp->SecurityBufferOffset);
1470 		memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1471 		rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1472 		kfree(spnego_blob);
1473 	}
1474 
1475 	user = session_user(conn, req);
1476 	if (!user) {
1477 		ksmbd_debug(SMB, "Unknown user name or an error\n");
1478 		return -EPERM;
1479 	}
1480 
1481 	/* Check for previous session */
1482 	prev_id = le64_to_cpu(req->PreviousSessionId);
1483 	if (prev_id && prev_id != sess->id)
1484 		destroy_previous_session(conn, user, prev_id);
1485 
1486 	if (sess->state == SMB2_SESSION_VALID) {
1487 		/*
1488 		 * Reuse session if anonymous try to connect
1489 		 * on reauthetication.
1490 		 */
1491 		if (conn->binding == false && ksmbd_anonymous_user(user)) {
1492 			ksmbd_free_user(user);
1493 			return 0;
1494 		}
1495 
1496 		if (!ksmbd_compare_user(sess->user, user)) {
1497 			ksmbd_free_user(user);
1498 			return -EPERM;
1499 		}
1500 		ksmbd_free_user(user);
1501 	} else {
1502 		sess->user = user;
1503 	}
1504 
1505 	if (conn->binding == false && user_guest(sess->user)) {
1506 		rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1507 	} else {
1508 		struct authenticate_message *authblob;
1509 
1510 		authblob = user_authblob(conn, req);
1511 		if (conn->use_spnego && conn->mechToken)
1512 			sz = conn->mechTokenLen;
1513 		else
1514 			sz = le16_to_cpu(req->SecurityBufferLength);
1515 		rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1516 		if (rc) {
1517 			set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1518 			ksmbd_debug(SMB, "authentication failed\n");
1519 			return -EPERM;
1520 		}
1521 	}
1522 
1523 	/*
1524 	 * If session state is SMB2_SESSION_VALID, We can assume
1525 	 * that it is reauthentication. And the user/password
1526 	 * has been verified, so return it here.
1527 	 */
1528 	if (sess->state == SMB2_SESSION_VALID) {
1529 		if (conn->binding)
1530 			goto binding_session;
1531 		return 0;
1532 	}
1533 
1534 	if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1535 	     (conn->sign || server_conf.enforced_signing)) ||
1536 	    (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1537 		sess->sign = true;
1538 
1539 	if (smb3_encryption_negotiated(conn) &&
1540 			!(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1541 		rc = conn->ops->generate_encryptionkey(conn, sess);
1542 		if (rc) {
1543 			ksmbd_debug(SMB,
1544 					"SMB3 encryption key generation failed\n");
1545 			return -EINVAL;
1546 		}
1547 		sess->enc = true;
1548 		if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1549 			rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1550 		/*
1551 		 * signing is disable if encryption is enable
1552 		 * on this session
1553 		 */
1554 		sess->sign = false;
1555 	}
1556 
1557 binding_session:
1558 	if (conn->dialect >= SMB30_PROT_ID) {
1559 		chann = lookup_chann_list(sess, conn);
1560 		if (!chann) {
1561 			chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1562 			if (!chann)
1563 				return -ENOMEM;
1564 
1565 			chann->conn = conn;
1566 			xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1567 		}
1568 	}
1569 
1570 	if (conn->ops->generate_signingkey) {
1571 		rc = conn->ops->generate_signingkey(sess, conn);
1572 		if (rc) {
1573 			ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1574 			return -EINVAL;
1575 		}
1576 	}
1577 
1578 	if (!ksmbd_conn_lookup_dialect(conn)) {
1579 		pr_err("fail to verify the dialect\n");
1580 		return -ENOENT;
1581 	}
1582 	return 0;
1583 }
1584 
1585 #ifdef CONFIG_SMB_SERVER_KERBEROS5
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1586 static int krb5_authenticate(struct ksmbd_work *work,
1587 			     struct smb2_sess_setup_req *req,
1588 			     struct smb2_sess_setup_rsp *rsp)
1589 {
1590 	struct ksmbd_conn *conn = work->conn;
1591 	struct ksmbd_session *sess = work->sess;
1592 	char *in_blob, *out_blob;
1593 	struct channel *chann = NULL;
1594 	u64 prev_sess_id;
1595 	int in_len, out_len;
1596 	int retval;
1597 
1598 	in_blob = (char *)&req->hdr.ProtocolId +
1599 		le16_to_cpu(req->SecurityBufferOffset);
1600 	in_len = le16_to_cpu(req->SecurityBufferLength);
1601 	out_blob = (char *)&rsp->hdr.ProtocolId +
1602 		le16_to_cpu(rsp->SecurityBufferOffset);
1603 	out_len = work->response_sz -
1604 		(le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1605 
1606 	/* Check previous session */
1607 	prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1608 	if (prev_sess_id && prev_sess_id != sess->id)
1609 		destroy_previous_session(conn, sess->user, prev_sess_id);
1610 
1611 	if (sess->state == SMB2_SESSION_VALID)
1612 		ksmbd_free_user(sess->user);
1613 
1614 	retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1615 					 out_blob, &out_len);
1616 	if (retval) {
1617 		ksmbd_debug(SMB, "krb5 authentication failed\n");
1618 		return -EINVAL;
1619 	}
1620 	rsp->SecurityBufferLength = cpu_to_le16(out_len);
1621 
1622 	if ((conn->sign || server_conf.enforced_signing) ||
1623 	    (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1624 		sess->sign = true;
1625 
1626 	if (smb3_encryption_negotiated(conn)) {
1627 		retval = conn->ops->generate_encryptionkey(conn, sess);
1628 		if (retval) {
1629 			ksmbd_debug(SMB,
1630 				    "SMB3 encryption key generation failed\n");
1631 			return -EINVAL;
1632 		}
1633 		sess->enc = true;
1634 		if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
1635 			rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1636 		sess->sign = false;
1637 	}
1638 
1639 	if (conn->dialect >= SMB30_PROT_ID) {
1640 		chann = lookup_chann_list(sess, conn);
1641 		if (!chann) {
1642 			chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1643 			if (!chann)
1644 				return -ENOMEM;
1645 
1646 			chann->conn = conn;
1647 			xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
1648 		}
1649 	}
1650 
1651 	if (conn->ops->generate_signingkey) {
1652 		retval = conn->ops->generate_signingkey(sess, conn);
1653 		if (retval) {
1654 			ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1655 			return -EINVAL;
1656 		}
1657 	}
1658 
1659 	if (!ksmbd_conn_lookup_dialect(conn)) {
1660 		pr_err("fail to verify the dialect\n");
1661 		return -ENOENT;
1662 	}
1663 	return 0;
1664 }
1665 #else
krb5_authenticate(struct ksmbd_work * work,struct smb2_sess_setup_req * req,struct smb2_sess_setup_rsp * rsp)1666 static int krb5_authenticate(struct ksmbd_work *work,
1667 			     struct smb2_sess_setup_req *req,
1668 			     struct smb2_sess_setup_rsp *rsp)
1669 {
1670 	return -EOPNOTSUPP;
1671 }
1672 #endif
1673 
smb2_sess_setup(struct ksmbd_work * work)1674 int smb2_sess_setup(struct ksmbd_work *work)
1675 {
1676 	struct ksmbd_conn *conn = work->conn;
1677 	struct smb2_sess_setup_req *req;
1678 	struct smb2_sess_setup_rsp *rsp;
1679 	struct ksmbd_session *sess;
1680 	struct negotiate_message *negblob;
1681 	unsigned int negblob_len, negblob_off;
1682 	int rc = 0;
1683 
1684 	ksmbd_debug(SMB, "Received request for session setup\n");
1685 
1686 	WORK_BUFFERS(work, req, rsp);
1687 
1688 	rsp->StructureSize = cpu_to_le16(9);
1689 	rsp->SessionFlags = 0;
1690 	rsp->SecurityBufferOffset = cpu_to_le16(72);
1691 	rsp->SecurityBufferLength = 0;
1692 
1693 	ksmbd_conn_lock(conn);
1694 	if (!req->hdr.SessionId) {
1695 		sess = ksmbd_smb2_session_create();
1696 		if (!sess) {
1697 			rc = -ENOMEM;
1698 			goto out_err;
1699 		}
1700 		rsp->hdr.SessionId = cpu_to_le64(sess->id);
1701 		rc = ksmbd_session_register(conn, sess);
1702 		if (rc)
1703 			goto out_err;
1704 	} else if (conn->dialect >= SMB30_PROT_ID &&
1705 		   (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1706 		   req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1707 		u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1708 
1709 		sess = ksmbd_session_lookup_slowpath(sess_id);
1710 		if (!sess) {
1711 			rc = -ENOENT;
1712 			goto out_err;
1713 		}
1714 
1715 		if (conn->dialect != sess->dialect) {
1716 			rc = -EINVAL;
1717 			goto out_err;
1718 		}
1719 
1720 		if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1721 			rc = -EINVAL;
1722 			goto out_err;
1723 		}
1724 
1725 		if (strncmp(conn->ClientGUID, sess->ClientGUID,
1726 			    SMB2_CLIENT_GUID_SIZE)) {
1727 			rc = -ENOENT;
1728 			goto out_err;
1729 		}
1730 
1731 		if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1732 			rc = -EACCES;
1733 			goto out_err;
1734 		}
1735 
1736 		if (sess->state == SMB2_SESSION_EXPIRED) {
1737 			rc = -EFAULT;
1738 			goto out_err;
1739 		}
1740 
1741 		if (ksmbd_conn_need_reconnect(conn)) {
1742 			rc = -EFAULT;
1743 			sess = NULL;
1744 			goto out_err;
1745 		}
1746 
1747 		if (ksmbd_session_lookup(conn, sess_id)) {
1748 			rc = -EACCES;
1749 			goto out_err;
1750 		}
1751 
1752 		if (user_guest(sess->user)) {
1753 			rc = -EOPNOTSUPP;
1754 			goto out_err;
1755 		}
1756 
1757 		conn->binding = true;
1758 	} else if ((conn->dialect < SMB30_PROT_ID ||
1759 		    server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1760 		   (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1761 		sess = NULL;
1762 		rc = -EACCES;
1763 		goto out_err;
1764 	} else {
1765 		sess = ksmbd_session_lookup(conn,
1766 					    le64_to_cpu(req->hdr.SessionId));
1767 		if (!sess) {
1768 			rc = -ENOENT;
1769 			goto out_err;
1770 		}
1771 
1772 		if (sess->state == SMB2_SESSION_EXPIRED) {
1773 			rc = -EFAULT;
1774 			goto out_err;
1775 		}
1776 
1777 		if (ksmbd_conn_need_reconnect(conn)) {
1778 			rc = -EFAULT;
1779 			sess = NULL;
1780 			goto out_err;
1781 		}
1782 	}
1783 	work->sess = sess;
1784 
1785 	negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1786 	negblob_len = le16_to_cpu(req->SecurityBufferLength);
1787 	if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
1788 		rc = -EINVAL;
1789 		goto out_err;
1790 	}
1791 
1792 	negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1793 			negblob_off);
1794 
1795 	if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1796 		if (conn->mechToken) {
1797 			negblob = (struct negotiate_message *)conn->mechToken;
1798 			negblob_len = conn->mechTokenLen;
1799 		}
1800 	}
1801 
1802 	if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1803 		rc = -EINVAL;
1804 		goto out_err;
1805 	}
1806 
1807 	if (server_conf.auth_mechs & conn->auth_mechs) {
1808 		rc = generate_preauth_hash(work);
1809 		if (rc)
1810 			goto out_err;
1811 
1812 		if (conn->preferred_auth_mech &
1813 				(KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1814 			rc = krb5_authenticate(work, req, rsp);
1815 			if (rc) {
1816 				rc = -EINVAL;
1817 				goto out_err;
1818 			}
1819 
1820 			if (!ksmbd_conn_need_reconnect(conn)) {
1821 				ksmbd_conn_set_good(conn);
1822 				sess->state = SMB2_SESSION_VALID;
1823 			}
1824 			kfree(sess->Preauth_HashValue);
1825 			sess->Preauth_HashValue = NULL;
1826 		} else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1827 			if (negblob->MessageType == NtLmNegotiate) {
1828 				rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
1829 				if (rc)
1830 					goto out_err;
1831 				rsp->hdr.Status =
1832 					STATUS_MORE_PROCESSING_REQUIRED;
1833 			} else if (negblob->MessageType == NtLmAuthenticate) {
1834 				rc = ntlm_authenticate(work, req, rsp);
1835 				if (rc)
1836 					goto out_err;
1837 
1838 				if (!ksmbd_conn_need_reconnect(conn)) {
1839 					ksmbd_conn_set_good(conn);
1840 					sess->state = SMB2_SESSION_VALID;
1841 				}
1842 				if (conn->binding) {
1843 					struct preauth_session *preauth_sess;
1844 
1845 					preauth_sess =
1846 						ksmbd_preauth_session_lookup(conn, sess->id);
1847 					if (preauth_sess) {
1848 						list_del(&preauth_sess->preauth_entry);
1849 						kfree(preauth_sess);
1850 					}
1851 				}
1852 				kfree(sess->Preauth_HashValue);
1853 				sess->Preauth_HashValue = NULL;
1854 			} else {
1855 				pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
1856 						le32_to_cpu(negblob->MessageType));
1857 				rc = -EINVAL;
1858 			}
1859 		} else {
1860 			/* TODO: need one more negotiation */
1861 			pr_err("Not support the preferred authentication\n");
1862 			rc = -EINVAL;
1863 		}
1864 	} else {
1865 		pr_err("Not support authentication\n");
1866 		rc = -EINVAL;
1867 	}
1868 
1869 out_err:
1870 	if (rc == -EINVAL)
1871 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1872 	else if (rc == -ENOENT)
1873 		rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1874 	else if (rc == -EACCES)
1875 		rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1876 	else if (rc == -EFAULT)
1877 		rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1878 	else if (rc == -ENOMEM)
1879 		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1880 	else if (rc == -EOPNOTSUPP)
1881 		rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1882 	else if (rc)
1883 		rsp->hdr.Status = STATUS_LOGON_FAILURE;
1884 
1885 	if (conn->use_spnego && conn->mechToken) {
1886 		kfree(conn->mechToken);
1887 		conn->mechToken = NULL;
1888 	}
1889 
1890 	if (rc < 0) {
1891 		/*
1892 		 * SecurityBufferOffset should be set to zero
1893 		 * in session setup error response.
1894 		 */
1895 		rsp->SecurityBufferOffset = 0;
1896 
1897 		if (sess) {
1898 			bool try_delay = false;
1899 
1900 			/*
1901 			 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1902 			 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1903 			 * failure to make it harder to send enough random connection requests
1904 			 * to break into a server.
1905 			 */
1906 			if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1907 				try_delay = true;
1908 
1909 			sess->last_active = jiffies;
1910 			sess->state = SMB2_SESSION_EXPIRED;
1911 			if (try_delay) {
1912 				ksmbd_conn_set_need_reconnect(conn);
1913 				ssleep(5);
1914 				ksmbd_conn_set_need_negotiate(conn);
1915 			}
1916 		}
1917 		smb2_set_err_rsp(work);
1918 	} else {
1919 		unsigned int iov_len;
1920 
1921 		if (rsp->SecurityBufferLength)
1922 			iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
1923 				le16_to_cpu(rsp->SecurityBufferLength);
1924 		else
1925 			iov_len = sizeof(struct smb2_sess_setup_rsp);
1926 		rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
1927 		if (rc)
1928 			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1929 	}
1930 
1931 	ksmbd_conn_unlock(conn);
1932 	return rc;
1933 }
1934 
1935 /**
1936  * smb2_tree_connect() - handler for smb2 tree connect command
1937  * @work:	smb work containing smb request buffer
1938  *
1939  * Return:      0 on success, otherwise error
1940  */
smb2_tree_connect(struct ksmbd_work * work)1941 int smb2_tree_connect(struct ksmbd_work *work)
1942 {
1943 	struct ksmbd_conn *conn = work->conn;
1944 	struct smb2_tree_connect_req *req;
1945 	struct smb2_tree_connect_rsp *rsp;
1946 	struct ksmbd_session *sess = work->sess;
1947 	char *treename = NULL, *name = NULL;
1948 	struct ksmbd_tree_conn_status status;
1949 	struct ksmbd_share_config *share;
1950 	int rc = -EINVAL;
1951 
1952 	WORK_BUFFERS(work, req, rsp);
1953 
1954 	treename = smb_strndup_from_utf16(req->Buffer,
1955 					  le16_to_cpu(req->PathLength), true,
1956 					  conn->local_nls);
1957 	if (IS_ERR(treename)) {
1958 		pr_err("treename is NULL\n");
1959 		status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1960 		goto out_err1;
1961 	}
1962 
1963 	name = ksmbd_extract_sharename(conn->um, treename);
1964 	if (IS_ERR(name)) {
1965 		status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1966 		goto out_err1;
1967 	}
1968 
1969 	ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1970 		    name, treename);
1971 
1972 	status = ksmbd_tree_conn_connect(conn, sess, name);
1973 	if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1974 		rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1975 	else
1976 		goto out_err1;
1977 
1978 	share = status.tree_conn->share_conf;
1979 	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1980 		ksmbd_debug(SMB, "IPC share path request\n");
1981 		rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1982 		rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1983 			FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1984 			FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1985 			FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1986 			FILE_SYNCHRONIZE_LE;
1987 	} else {
1988 		rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1989 		rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1990 			FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1991 		if (test_tree_conn_flag(status.tree_conn,
1992 					KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1993 			rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1994 				FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1995 				FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1996 				FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1997 				FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1998 				FILE_SYNCHRONIZE_LE;
1999 		}
2000 	}
2001 
2002 	status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
2003 	if (conn->posix_ext_supported)
2004 		status.tree_conn->posix_extensions = true;
2005 
2006 	write_lock(&sess->tree_conns_lock);
2007 	status.tree_conn->t_state = TREE_CONNECTED;
2008 	write_unlock(&sess->tree_conns_lock);
2009 	rsp->StructureSize = cpu_to_le16(16);
2010 out_err1:
2011 	rsp->Capabilities = 0;
2012 	rsp->Reserved = 0;
2013 	/* default manual caching */
2014 	rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
2015 
2016 	rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
2017 	if (rc)
2018 		status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
2019 
2020 	if (!IS_ERR(treename))
2021 		kfree(treename);
2022 	if (!IS_ERR(name))
2023 		kfree(name);
2024 
2025 	switch (status.ret) {
2026 	case KSMBD_TREE_CONN_STATUS_OK:
2027 		rsp->hdr.Status = STATUS_SUCCESS;
2028 		rc = 0;
2029 		break;
2030 	case -ESTALE:
2031 	case -ENOENT:
2032 	case KSMBD_TREE_CONN_STATUS_NO_SHARE:
2033 		rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
2034 		break;
2035 	case -ENOMEM:
2036 	case KSMBD_TREE_CONN_STATUS_NOMEM:
2037 		rsp->hdr.Status = STATUS_NO_MEMORY;
2038 		break;
2039 	case KSMBD_TREE_CONN_STATUS_ERROR:
2040 	case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
2041 	case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
2042 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
2043 		break;
2044 	case -EINVAL:
2045 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2046 		break;
2047 	default:
2048 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
2049 	}
2050 
2051 	if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
2052 		smb2_set_err_rsp(work);
2053 
2054 	return rc;
2055 }
2056 
2057 /**
2058  * smb2_create_open_flags() - convert smb open flags to unix open flags
2059  * @file_present:	is file already present
2060  * @access:		file access flags
2061  * @disposition:	file disposition flags
2062  * @may_flags:		set with MAY_ flags
2063  *
2064  * Return:      file open flags
2065  */
smb2_create_open_flags(bool file_present,__le32 access,__le32 disposition,int * may_flags)2066 static int smb2_create_open_flags(bool file_present, __le32 access,
2067 				  __le32 disposition,
2068 				  int *may_flags)
2069 {
2070 	int oflags = O_NONBLOCK | O_LARGEFILE;
2071 
2072 	if (access & FILE_READ_DESIRED_ACCESS_LE &&
2073 	    access & FILE_WRITE_DESIRE_ACCESS_LE) {
2074 		oflags |= O_RDWR;
2075 		*may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
2076 	} else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
2077 		oflags |= O_WRONLY;
2078 		*may_flags = MAY_OPEN | MAY_WRITE;
2079 	} else {
2080 		oflags |= O_RDONLY;
2081 		*may_flags = MAY_OPEN | MAY_READ;
2082 	}
2083 
2084 	if (access == FILE_READ_ATTRIBUTES_LE)
2085 		oflags |= O_PATH;
2086 
2087 	if (file_present) {
2088 		switch (disposition & FILE_CREATE_MASK_LE) {
2089 		case FILE_OPEN_LE:
2090 		case FILE_CREATE_LE:
2091 			break;
2092 		case FILE_SUPERSEDE_LE:
2093 		case FILE_OVERWRITE_LE:
2094 		case FILE_OVERWRITE_IF_LE:
2095 			oflags |= O_TRUNC;
2096 			break;
2097 		default:
2098 			break;
2099 		}
2100 	} else {
2101 		switch (disposition & FILE_CREATE_MASK_LE) {
2102 		case FILE_SUPERSEDE_LE:
2103 		case FILE_CREATE_LE:
2104 		case FILE_OPEN_IF_LE:
2105 		case FILE_OVERWRITE_IF_LE:
2106 			oflags |= O_CREAT;
2107 			break;
2108 		case FILE_OPEN_LE:
2109 		case FILE_OVERWRITE_LE:
2110 			oflags &= ~O_CREAT;
2111 			break;
2112 		default:
2113 			break;
2114 		}
2115 	}
2116 
2117 	return oflags;
2118 }
2119 
2120 /**
2121  * smb2_tree_disconnect() - handler for smb tree connect request
2122  * @work:	smb work containing request buffer
2123  *
2124  * Return:      0
2125  */
smb2_tree_disconnect(struct ksmbd_work * work)2126 int smb2_tree_disconnect(struct ksmbd_work *work)
2127 {
2128 	struct smb2_tree_disconnect_rsp *rsp;
2129 	struct smb2_tree_disconnect_req *req;
2130 	struct ksmbd_session *sess = work->sess;
2131 	struct ksmbd_tree_connect *tcon = work->tcon;
2132 	int err;
2133 
2134 	WORK_BUFFERS(work, req, rsp);
2135 
2136 	ksmbd_debug(SMB, "request\n");
2137 
2138 	if (!tcon) {
2139 		ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2140 
2141 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2142 		err = -ENOENT;
2143 		goto err_out;
2144 	}
2145 
2146 	ksmbd_close_tree_conn_fds(work);
2147 
2148 	write_lock(&sess->tree_conns_lock);
2149 	if (tcon->t_state == TREE_DISCONNECTED) {
2150 		write_unlock(&sess->tree_conns_lock);
2151 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2152 		err = -ENOENT;
2153 		goto err_out;
2154 	}
2155 
2156 	WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
2157 	tcon->t_state = TREE_DISCONNECTED;
2158 	write_unlock(&sess->tree_conns_lock);
2159 
2160 	err = ksmbd_tree_conn_disconnect(sess, tcon);
2161 	if (err) {
2162 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2163 		goto err_out;
2164 	}
2165 
2166 	work->tcon = NULL;
2167 
2168 	rsp->StructureSize = cpu_to_le16(4);
2169 	err = ksmbd_iov_pin_rsp(work, rsp,
2170 				sizeof(struct smb2_tree_disconnect_rsp));
2171 	if (err) {
2172 		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2173 		goto err_out;
2174 	}
2175 
2176 	return 0;
2177 
2178 err_out:
2179 	smb2_set_err_rsp(work);
2180 	return err;
2181 
2182 }
2183 
2184 /**
2185  * smb2_session_logoff() - handler for session log off request
2186  * @work:	smb work containing request buffer
2187  *
2188  * Return:      0
2189  */
smb2_session_logoff(struct ksmbd_work * work)2190 int smb2_session_logoff(struct ksmbd_work *work)
2191 {
2192 	struct ksmbd_conn *conn = work->conn;
2193 	struct smb2_logoff_req *req;
2194 	struct smb2_logoff_rsp *rsp;
2195 	struct ksmbd_session *sess;
2196 	u64 sess_id;
2197 	int err;
2198 
2199 	WORK_BUFFERS(work, req, rsp);
2200 
2201 	ksmbd_debug(SMB, "request\n");
2202 
2203 	ksmbd_conn_lock(conn);
2204 	if (!ksmbd_conn_good(conn)) {
2205 		ksmbd_conn_unlock(conn);
2206 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2207 		smb2_set_err_rsp(work);
2208 		return -ENOENT;
2209 	}
2210 	sess_id = le64_to_cpu(req->hdr.SessionId);
2211 	ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
2212 	ksmbd_conn_unlock(conn);
2213 
2214 	ksmbd_close_session_fds(work);
2215 	ksmbd_conn_wait_idle(conn, sess_id);
2216 
2217 	/*
2218 	 * Re-lookup session to validate if session is deleted
2219 	 * while waiting request complete
2220 	 */
2221 	sess = ksmbd_session_lookup_all(conn, sess_id);
2222 	if (ksmbd_tree_conn_session_logoff(sess)) {
2223 		ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2224 		rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2225 		smb2_set_err_rsp(work);
2226 		return -ENOENT;
2227 	}
2228 
2229 	ksmbd_destroy_file_table(&sess->file_table);
2230 	sess->state = SMB2_SESSION_EXPIRED;
2231 
2232 	ksmbd_free_user(sess->user);
2233 	sess->user = NULL;
2234 	ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
2235 
2236 	rsp->StructureSize = cpu_to_le16(4);
2237 	err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
2238 	if (err) {
2239 		rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
2240 		smb2_set_err_rsp(work);
2241 		return err;
2242 	}
2243 	return 0;
2244 }
2245 
2246 /**
2247  * create_smb2_pipe() - create IPC pipe
2248  * @work:	smb work containing request buffer
2249  *
2250  * Return:      0 on success, otherwise error
2251  */
create_smb2_pipe(struct ksmbd_work * work)2252 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2253 {
2254 	struct smb2_create_rsp *rsp;
2255 	struct smb2_create_req *req;
2256 	int id;
2257 	int err;
2258 	char *name;
2259 
2260 	WORK_BUFFERS(work, req, rsp);
2261 
2262 	name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2263 				      1, work->conn->local_nls);
2264 	if (IS_ERR(name)) {
2265 		rsp->hdr.Status = STATUS_NO_MEMORY;
2266 		err = PTR_ERR(name);
2267 		goto out;
2268 	}
2269 
2270 	id = ksmbd_session_rpc_open(work->sess, name);
2271 	if (id < 0) {
2272 		pr_err("Unable to open RPC pipe: %d\n", id);
2273 		err = id;
2274 		goto out;
2275 	}
2276 
2277 	rsp->hdr.Status = STATUS_SUCCESS;
2278 	rsp->StructureSize = cpu_to_le16(89);
2279 	rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2280 	rsp->Flags = 0;
2281 	rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2282 
2283 	rsp->CreationTime = cpu_to_le64(0);
2284 	rsp->LastAccessTime = cpu_to_le64(0);
2285 	rsp->ChangeTime = cpu_to_le64(0);
2286 	rsp->AllocationSize = cpu_to_le64(0);
2287 	rsp->EndofFile = cpu_to_le64(0);
2288 	rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2289 	rsp->Reserved2 = 0;
2290 	rsp->VolatileFileId = id;
2291 	rsp->PersistentFileId = 0;
2292 	rsp->CreateContextsOffset = 0;
2293 	rsp->CreateContextsLength = 0;
2294 
2295 	err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
2296 	if (err)
2297 		goto out;
2298 
2299 	kfree(name);
2300 	return 0;
2301 
2302 out:
2303 	switch (err) {
2304 	case -EINVAL:
2305 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2306 		break;
2307 	case -ENOSPC:
2308 	case -ENOMEM:
2309 		rsp->hdr.Status = STATUS_NO_MEMORY;
2310 		break;
2311 	}
2312 
2313 	if (!IS_ERR(name))
2314 		kfree(name);
2315 
2316 	smb2_set_err_rsp(work);
2317 	return err;
2318 }
2319 
2320 /**
2321  * smb2_set_ea() - handler for setting extended attributes using set
2322  *		info command
2323  * @eabuf:	set info command buffer
2324  * @buf_len:	set info command buffer length
2325  * @path:	dentry path for get ea
2326  * @get_write:	get write access to a mount
2327  *
2328  * Return:	0 on success, otherwise error
2329  */
smb2_set_ea(struct smb2_ea_info * eabuf,unsigned int buf_len,const struct path * path,bool get_write)2330 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2331 		       const struct path *path, bool get_write)
2332 {
2333 	struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2334 	char *attr_name = NULL, *value;
2335 	int rc = 0;
2336 	unsigned int next = 0;
2337 
2338 	if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2339 			le16_to_cpu(eabuf->EaValueLength))
2340 		return -EINVAL;
2341 
2342 	attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2343 	if (!attr_name)
2344 		return -ENOMEM;
2345 
2346 	do {
2347 		if (!eabuf->EaNameLength)
2348 			goto next;
2349 
2350 		ksmbd_debug(SMB,
2351 			    "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2352 			    eabuf->name, eabuf->EaNameLength,
2353 			    le16_to_cpu(eabuf->EaValueLength),
2354 			    le32_to_cpu(eabuf->NextEntryOffset));
2355 
2356 		if (eabuf->EaNameLength >
2357 		    (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2358 			rc = -EINVAL;
2359 			break;
2360 		}
2361 
2362 		memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2363 		memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2364 		       eabuf->EaNameLength);
2365 		attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2366 		value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2367 
2368 		if (!eabuf->EaValueLength) {
2369 			rc = ksmbd_vfs_casexattr_len(idmap,
2370 						     path->dentry,
2371 						     attr_name,
2372 						     XATTR_USER_PREFIX_LEN +
2373 						     eabuf->EaNameLength);
2374 
2375 			/* delete the EA only when it exits */
2376 			if (rc > 0) {
2377 				rc = ksmbd_vfs_remove_xattr(idmap,
2378 							    path,
2379 							    attr_name);
2380 
2381 				if (rc < 0) {
2382 					ksmbd_debug(SMB,
2383 						    "remove xattr failed(%d)\n",
2384 						    rc);
2385 					break;
2386 				}
2387 			}
2388 
2389 			/* if the EA doesn't exist, just do nothing. */
2390 			rc = 0;
2391 		} else {
2392 			rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
2393 						le16_to_cpu(eabuf->EaValueLength),
2394 						0, true);
2395 			if (rc < 0) {
2396 				ksmbd_debug(SMB,
2397 					    "ksmbd_vfs_setxattr is failed(%d)\n",
2398 					    rc);
2399 				break;
2400 			}
2401 		}
2402 
2403 next:
2404 		next = le32_to_cpu(eabuf->NextEntryOffset);
2405 		if (next == 0 || buf_len < next)
2406 			break;
2407 		buf_len -= next;
2408 		eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2409 		if (buf_len < sizeof(struct smb2_ea_info)) {
2410 			rc = -EINVAL;
2411 			break;
2412 		}
2413 
2414 		if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2415 				le16_to_cpu(eabuf->EaValueLength)) {
2416 			rc = -EINVAL;
2417 			break;
2418 		}
2419 	} while (next != 0);
2420 
2421 	kfree(attr_name);
2422 	return rc;
2423 }
2424 
smb2_set_stream_name_xattr(const struct path * path,struct ksmbd_file * fp,char * stream_name,int s_type)2425 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2426 					       struct ksmbd_file *fp,
2427 					       char *stream_name, int s_type)
2428 {
2429 	struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2430 	size_t xattr_stream_size;
2431 	char *xattr_stream_name;
2432 	int rc;
2433 
2434 	rc = ksmbd_vfs_xattr_stream_name(stream_name,
2435 					 &xattr_stream_name,
2436 					 &xattr_stream_size,
2437 					 s_type);
2438 	if (rc)
2439 		return rc;
2440 
2441 	fp->stream.name = xattr_stream_name;
2442 	fp->stream.size = xattr_stream_size;
2443 
2444 	/* Check if there is stream prefix in xattr space */
2445 	rc = ksmbd_vfs_casexattr_len(idmap,
2446 				     path->dentry,
2447 				     xattr_stream_name,
2448 				     xattr_stream_size);
2449 	if (rc >= 0)
2450 		return 0;
2451 
2452 	if (fp->cdoption == FILE_OPEN_LE) {
2453 		ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2454 		return -EBADF;
2455 	}
2456 
2457 	rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
2458 	if (rc < 0)
2459 		pr_err("Failed to store XATTR stream name :%d\n", rc);
2460 	return 0;
2461 }
2462 
smb2_remove_smb_xattrs(const struct path * path)2463 static int smb2_remove_smb_xattrs(const struct path *path)
2464 {
2465 	struct mnt_idmap *idmap = mnt_idmap(path->mnt);
2466 	char *name, *xattr_list = NULL;
2467 	ssize_t xattr_list_len;
2468 	int err = 0;
2469 
2470 	xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2471 	if (xattr_list_len < 0) {
2472 		goto out;
2473 	} else if (!xattr_list_len) {
2474 		ksmbd_debug(SMB, "empty xattr in the file\n");
2475 		goto out;
2476 	}
2477 
2478 	for (name = xattr_list; name - xattr_list < xattr_list_len;
2479 			name += strlen(name) + 1) {
2480 		ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2481 
2482 		if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2483 		    !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2484 			     STREAM_PREFIX_LEN)) {
2485 			err = ksmbd_vfs_remove_xattr(idmap, path,
2486 						     name);
2487 			if (err)
2488 				ksmbd_debug(SMB, "remove xattr failed : %s\n",
2489 					    name);
2490 		}
2491 	}
2492 out:
2493 	kvfree(xattr_list);
2494 	return err;
2495 }
2496 
smb2_create_truncate(const struct path * path)2497 static int smb2_create_truncate(const struct path *path)
2498 {
2499 	int rc = vfs_truncate(path, 0);
2500 
2501 	if (rc) {
2502 		pr_err("vfs_truncate failed, rc %d\n", rc);
2503 		return rc;
2504 	}
2505 
2506 	rc = smb2_remove_smb_xattrs(path);
2507 	if (rc == -EOPNOTSUPP)
2508 		rc = 0;
2509 	if (rc)
2510 		ksmbd_debug(SMB,
2511 			    "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2512 			    rc);
2513 	return rc;
2514 }
2515 
smb2_new_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2516 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2517 			    struct ksmbd_file *fp)
2518 {
2519 	struct xattr_dos_attrib da = {0};
2520 	int rc;
2521 
2522 	if (!test_share_config_flag(tcon->share_conf,
2523 				    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2524 		return;
2525 
2526 	da.version = 4;
2527 	da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2528 	da.itime = da.create_time = fp->create_time;
2529 	da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2530 		XATTR_DOSINFO_ITIME;
2531 
2532 	rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true);
2533 	if (rc)
2534 		ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2535 }
2536 
smb2_update_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2537 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2538 			       const struct path *path, struct ksmbd_file *fp)
2539 {
2540 	struct xattr_dos_attrib da;
2541 	int rc;
2542 
2543 	fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2544 
2545 	/* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2546 	if (!test_share_config_flag(tcon->share_conf,
2547 				    KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2548 		return;
2549 
2550 	rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
2551 					    path->dentry, &da);
2552 	if (rc > 0) {
2553 		fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2554 		fp->create_time = da.create_time;
2555 		fp->itime = da.itime;
2556 	}
2557 }
2558 
smb2_creat(struct ksmbd_work * work,struct path * parent_path,struct path * path,char * name,int open_flags,umode_t posix_mode,bool is_dir)2559 static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
2560 		      struct path *path, char *name, int open_flags,
2561 		      umode_t posix_mode, bool is_dir)
2562 {
2563 	struct ksmbd_tree_connect *tcon = work->tcon;
2564 	struct ksmbd_share_config *share = tcon->share_conf;
2565 	umode_t mode;
2566 	int rc;
2567 
2568 	if (!(open_flags & O_CREAT))
2569 		return -EBADF;
2570 
2571 	ksmbd_debug(SMB, "file does not exist, so creating\n");
2572 	if (is_dir == true) {
2573 		ksmbd_debug(SMB, "creating directory\n");
2574 
2575 		mode = share_config_directory_mode(share, posix_mode);
2576 		rc = ksmbd_vfs_mkdir(work, name, mode);
2577 		if (rc)
2578 			return rc;
2579 	} else {
2580 		ksmbd_debug(SMB, "creating regular file\n");
2581 
2582 		mode = share_config_create_mode(share, posix_mode);
2583 		rc = ksmbd_vfs_create(work, name, mode);
2584 		if (rc)
2585 			return rc;
2586 	}
2587 
2588 	rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
2589 	if (rc) {
2590 		pr_err("cannot get linux path (%s), err = %d\n",
2591 		       name, rc);
2592 		return rc;
2593 	}
2594 	return 0;
2595 }
2596 
smb2_create_sd_buffer(struct ksmbd_work * work,struct smb2_create_req * req,const struct path * path)2597 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2598 				 struct smb2_create_req *req,
2599 				 const struct path *path)
2600 {
2601 	struct create_context *context;
2602 	struct create_sd_buf_req *sd_buf;
2603 
2604 	if (!req->CreateContextsOffset)
2605 		return -ENOENT;
2606 
2607 	/* Parse SD BUFFER create contexts */
2608 	context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
2609 	if (!context)
2610 		return -ENOENT;
2611 	else if (IS_ERR(context))
2612 		return PTR_ERR(context);
2613 
2614 	ksmbd_debug(SMB,
2615 		    "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2616 	sd_buf = (struct create_sd_buf_req *)context;
2617 	if (le16_to_cpu(context->DataOffset) +
2618 	    le32_to_cpu(context->DataLength) <
2619 	    sizeof(struct create_sd_buf_req))
2620 		return -EINVAL;
2621 	return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2622 			    le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
2623 }
2624 
ksmbd_acls_fattr(struct smb_fattr * fattr,struct mnt_idmap * idmap,struct inode * inode)2625 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2626 			     struct mnt_idmap *idmap,
2627 			     struct inode *inode)
2628 {
2629 	vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
2630 	vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
2631 
2632 	fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2633 	fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2634 	fattr->cf_mode = inode->i_mode;
2635 	fattr->cf_acls = NULL;
2636 	fattr->cf_dacls = NULL;
2637 
2638 	if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2639 		fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
2640 		if (S_ISDIR(inode->i_mode))
2641 			fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
2642 	}
2643 }
2644 
2645 /**
2646  * smb2_open() - handler for smb file open request
2647  * @work:	smb work containing request buffer
2648  *
2649  * Return:      0 on success, otherwise error
2650  */
smb2_open(struct ksmbd_work * work)2651 int smb2_open(struct ksmbd_work *work)
2652 {
2653 	struct ksmbd_conn *conn = work->conn;
2654 	struct ksmbd_session *sess = work->sess;
2655 	struct ksmbd_tree_connect *tcon = work->tcon;
2656 	struct smb2_create_req *req;
2657 	struct smb2_create_rsp *rsp;
2658 	struct path path, parent_path;
2659 	struct ksmbd_share_config *share = tcon->share_conf;
2660 	struct ksmbd_file *fp = NULL;
2661 	struct file *filp = NULL;
2662 	struct mnt_idmap *idmap = NULL;
2663 	struct kstat stat;
2664 	struct create_context *context;
2665 	struct lease_ctx_info *lc = NULL;
2666 	struct create_ea_buf_req *ea_buf = NULL;
2667 	struct oplock_info *opinfo;
2668 	__le32 *next_ptr = NULL;
2669 	int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2670 	int rc = 0;
2671 	int contxt_cnt = 0, query_disk_id = 0;
2672 	int maximal_access_ctxt = 0, posix_ctxt = 0;
2673 	int s_type = 0;
2674 	int next_off = 0;
2675 	char *name = NULL;
2676 	char *stream_name = NULL;
2677 	bool file_present = false, created = false, already_permitted = false;
2678 	int share_ret, need_truncate = 0;
2679 	u64 time;
2680 	umode_t posix_mode = 0;
2681 	__le32 daccess, maximal_access = 0;
2682 	int iov_len = 0;
2683 
2684 	WORK_BUFFERS(work, req, rsp);
2685 
2686 	if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2687 	    (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2688 		ksmbd_debug(SMB, "invalid flag in chained command\n");
2689 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2690 		smb2_set_err_rsp(work);
2691 		return -EINVAL;
2692 	}
2693 
2694 	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2695 		ksmbd_debug(SMB, "IPC pipe create request\n");
2696 		return create_smb2_pipe(work);
2697 	}
2698 
2699 	if (req->NameLength) {
2700 		if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2701 		    *(char *)req->Buffer == '\\') {
2702 			pr_err("not allow directory name included leading slash\n");
2703 			rc = -EINVAL;
2704 			goto err_out2;
2705 		}
2706 
2707 		name = smb2_get_name(req->Buffer,
2708 				     le16_to_cpu(req->NameLength),
2709 				     work->conn->local_nls);
2710 		if (IS_ERR(name)) {
2711 			rc = PTR_ERR(name);
2712 			if (rc != -ENOMEM)
2713 				rc = -ENOENT;
2714 			name = NULL;
2715 			goto err_out2;
2716 		}
2717 
2718 		ksmbd_debug(SMB, "converted name = %s\n", name);
2719 		if (strchr(name, ':')) {
2720 			if (!test_share_config_flag(work->tcon->share_conf,
2721 						    KSMBD_SHARE_FLAG_STREAMS)) {
2722 				rc = -EBADF;
2723 				goto err_out2;
2724 			}
2725 			rc = parse_stream_name(name, &stream_name, &s_type);
2726 			if (rc < 0)
2727 				goto err_out2;
2728 		}
2729 
2730 		rc = ksmbd_validate_filename(name);
2731 		if (rc < 0)
2732 			goto err_out2;
2733 
2734 		if (ksmbd_share_veto_filename(share, name)) {
2735 			rc = -ENOENT;
2736 			ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2737 				    name);
2738 			goto err_out2;
2739 		}
2740 	} else {
2741 		name = kstrdup("", GFP_KERNEL);
2742 		if (!name) {
2743 			rc = -ENOMEM;
2744 			goto err_out2;
2745 		}
2746 	}
2747 
2748 	if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2749 		pr_err("Invalid impersonationlevel : 0x%x\n",
2750 		       le32_to_cpu(req->ImpersonationLevel));
2751 		rc = -EIO;
2752 		rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2753 		goto err_out2;
2754 	}
2755 
2756 	if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2757 		pr_err("Invalid create options : 0x%x\n",
2758 		       le32_to_cpu(req->CreateOptions));
2759 		rc = -EINVAL;
2760 		goto err_out2;
2761 	} else {
2762 		if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2763 		    req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2764 			req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2765 
2766 		if (req->CreateOptions &
2767 		    (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2768 		     FILE_RESERVE_OPFILTER_LE)) {
2769 			rc = -EOPNOTSUPP;
2770 			goto err_out2;
2771 		}
2772 
2773 		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2774 			if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2775 				rc = -EINVAL;
2776 				goto err_out2;
2777 			} else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2778 				req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2779 			}
2780 		}
2781 	}
2782 
2783 	if (le32_to_cpu(req->CreateDisposition) >
2784 	    le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2785 		pr_err("Invalid create disposition : 0x%x\n",
2786 		       le32_to_cpu(req->CreateDisposition));
2787 		rc = -EINVAL;
2788 		goto err_out2;
2789 	}
2790 
2791 	if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2792 		pr_err("Invalid desired access : 0x%x\n",
2793 		       le32_to_cpu(req->DesiredAccess));
2794 		rc = -EACCES;
2795 		goto err_out2;
2796 	}
2797 
2798 	if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2799 		pr_err("Invalid file attribute : 0x%x\n",
2800 		       le32_to_cpu(req->FileAttributes));
2801 		rc = -EINVAL;
2802 		goto err_out2;
2803 	}
2804 
2805 	if (req->CreateContextsOffset) {
2806 		/* Parse non-durable handle create contexts */
2807 		context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
2808 		if (IS_ERR(context)) {
2809 			rc = PTR_ERR(context);
2810 			goto err_out2;
2811 		} else if (context) {
2812 			ea_buf = (struct create_ea_buf_req *)context;
2813 			if (le16_to_cpu(context->DataOffset) +
2814 			    le32_to_cpu(context->DataLength) <
2815 			    sizeof(struct create_ea_buf_req)) {
2816 				rc = -EINVAL;
2817 				goto err_out2;
2818 			}
2819 			if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2820 				rsp->hdr.Status = STATUS_ACCESS_DENIED;
2821 				rc = -EACCES;
2822 				goto err_out2;
2823 			}
2824 		}
2825 
2826 		context = smb2_find_context_vals(req,
2827 						 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
2828 		if (IS_ERR(context)) {
2829 			rc = PTR_ERR(context);
2830 			goto err_out2;
2831 		} else if (context) {
2832 			ksmbd_debug(SMB,
2833 				    "get query maximal access context\n");
2834 			maximal_access_ctxt = 1;
2835 		}
2836 
2837 		context = smb2_find_context_vals(req,
2838 						 SMB2_CREATE_TIMEWARP_REQUEST, 4);
2839 		if (IS_ERR(context)) {
2840 			rc = PTR_ERR(context);
2841 			goto err_out2;
2842 		} else if (context) {
2843 			ksmbd_debug(SMB, "get timewarp context\n");
2844 			rc = -EBADF;
2845 			goto err_out2;
2846 		}
2847 
2848 		if (tcon->posix_extensions) {
2849 			context = smb2_find_context_vals(req,
2850 							 SMB2_CREATE_TAG_POSIX, 16);
2851 			if (IS_ERR(context)) {
2852 				rc = PTR_ERR(context);
2853 				goto err_out2;
2854 			} else if (context) {
2855 				struct create_posix *posix =
2856 					(struct create_posix *)context;
2857 				if (le16_to_cpu(context->DataOffset) +
2858 				    le32_to_cpu(context->DataLength) <
2859 				    sizeof(struct create_posix) - 4) {
2860 					rc = -EINVAL;
2861 					goto err_out2;
2862 				}
2863 				ksmbd_debug(SMB, "get posix context\n");
2864 
2865 				posix_mode = le32_to_cpu(posix->Mode);
2866 				posix_ctxt = 1;
2867 			}
2868 		}
2869 	}
2870 
2871 	if (ksmbd_override_fsids(work)) {
2872 		rc = -ENOMEM;
2873 		goto err_out2;
2874 	}
2875 
2876 	rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
2877 					&parent_path, &path, 1);
2878 	if (!rc) {
2879 		file_present = true;
2880 
2881 		if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2882 			/*
2883 			 * If file exists with under flags, return access
2884 			 * denied error.
2885 			 */
2886 			if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2887 			    req->CreateDisposition == FILE_OPEN_IF_LE) {
2888 				rc = -EACCES;
2889 				goto err_out;
2890 			}
2891 
2892 			if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2893 				ksmbd_debug(SMB,
2894 					    "User does not have write permission\n");
2895 				rc = -EACCES;
2896 				goto err_out;
2897 			}
2898 		} else if (d_is_symlink(path.dentry)) {
2899 			rc = -EACCES;
2900 			goto err_out;
2901 		}
2902 
2903 		file_present = true;
2904 		idmap = mnt_idmap(path.mnt);
2905 	} else {
2906 		if (rc != -ENOENT)
2907 			goto err_out;
2908 		ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2909 			    name, rc);
2910 		rc = 0;
2911 	}
2912 
2913 	if (stream_name) {
2914 		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2915 			if (s_type == DATA_STREAM) {
2916 				rc = -EIO;
2917 				rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2918 			}
2919 		} else {
2920 			if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2921 			    s_type == DATA_STREAM) {
2922 				rc = -EIO;
2923 				rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2924 			}
2925 		}
2926 
2927 		if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2928 		    req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2929 			rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2930 			rc = -EIO;
2931 		}
2932 
2933 		if (rc < 0)
2934 			goto err_out;
2935 	}
2936 
2937 	if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2938 	    S_ISDIR(d_inode(path.dentry)->i_mode) &&
2939 	    !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2940 		ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2941 			    name, req->CreateOptions);
2942 		rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2943 		rc = -EIO;
2944 		goto err_out;
2945 	}
2946 
2947 	if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2948 	    !(req->CreateDisposition == FILE_CREATE_LE) &&
2949 	    !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2950 		rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2951 		rc = -EIO;
2952 		goto err_out;
2953 	}
2954 
2955 	if (!stream_name && file_present &&
2956 	    req->CreateDisposition == FILE_CREATE_LE) {
2957 		rc = -EEXIST;
2958 		goto err_out;
2959 	}
2960 
2961 	daccess = smb_map_generic_desired_access(req->DesiredAccess);
2962 
2963 	if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2964 		rc = smb_check_perm_dacl(conn, &path, &daccess,
2965 					 sess->user->uid);
2966 		if (rc)
2967 			goto err_out;
2968 	}
2969 
2970 	if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2971 		if (!file_present) {
2972 			daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2973 		} else {
2974 			ksmbd_vfs_query_maximal_access(idmap,
2975 							    path.dentry,
2976 							    &daccess);
2977 			already_permitted = true;
2978 		}
2979 		maximal_access = daccess;
2980 	}
2981 
2982 	open_flags = smb2_create_open_flags(file_present, daccess,
2983 					    req->CreateDisposition,
2984 					    &may_flags);
2985 
2986 	if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2987 		if (open_flags & (O_CREAT | O_TRUNC)) {
2988 			ksmbd_debug(SMB,
2989 				    "User does not have write permission\n");
2990 			rc = -EACCES;
2991 			goto err_out;
2992 		}
2993 	}
2994 
2995 	/*create file if not present */
2996 	if (!file_present) {
2997 		rc = smb2_creat(work, &parent_path, &path, name, open_flags,
2998 				posix_mode,
2999 				req->CreateOptions & FILE_DIRECTORY_FILE_LE);
3000 		if (rc) {
3001 			if (rc == -ENOENT) {
3002 				rc = -EIO;
3003 				rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
3004 			}
3005 			goto err_out;
3006 		}
3007 
3008 		created = true;
3009 		idmap = mnt_idmap(path.mnt);
3010 		if (ea_buf) {
3011 			if (le32_to_cpu(ea_buf->ccontext.DataLength) <
3012 			    sizeof(struct smb2_ea_info)) {
3013 				rc = -EINVAL;
3014 				goto err_out;
3015 			}
3016 
3017 			rc = smb2_set_ea(&ea_buf->ea,
3018 					 le32_to_cpu(ea_buf->ccontext.DataLength),
3019 					 &path, false);
3020 			if (rc == -EOPNOTSUPP)
3021 				rc = 0;
3022 			else if (rc)
3023 				goto err_out;
3024 		}
3025 	} else if (!already_permitted) {
3026 		/* FILE_READ_ATTRIBUTE is allowed without inode_permission,
3027 		 * because execute(search) permission on a parent directory,
3028 		 * is already granted.
3029 		 */
3030 		if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
3031 			rc = inode_permission(idmap,
3032 					      d_inode(path.dentry),
3033 					      may_flags);
3034 			if (rc)
3035 				goto err_out;
3036 
3037 			if ((daccess & FILE_DELETE_LE) ||
3038 			    (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
3039 				rc = inode_permission(idmap,
3040 						      d_inode(path.dentry->d_parent),
3041 						      MAY_EXEC | MAY_WRITE);
3042 				if (rc)
3043 					goto err_out;
3044 			}
3045 		}
3046 	}
3047 
3048 	rc = ksmbd_query_inode_status(path.dentry->d_parent);
3049 	if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
3050 		rc = -EBUSY;
3051 		goto err_out;
3052 	}
3053 
3054 	rc = 0;
3055 	filp = dentry_open(&path, open_flags, current_cred());
3056 	if (IS_ERR(filp)) {
3057 		rc = PTR_ERR(filp);
3058 		pr_err("dentry open for dir failed, rc %d\n", rc);
3059 		goto err_out;
3060 	}
3061 
3062 	if (file_present) {
3063 		if (!(open_flags & O_TRUNC))
3064 			file_info = FILE_OPENED;
3065 		else
3066 			file_info = FILE_OVERWRITTEN;
3067 
3068 		if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
3069 		    FILE_SUPERSEDE_LE)
3070 			file_info = FILE_SUPERSEDED;
3071 	} else if (open_flags & O_CREAT) {
3072 		file_info = FILE_CREATED;
3073 	}
3074 
3075 	ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
3076 
3077 	/* Obtain Volatile-ID */
3078 	fp = ksmbd_open_fd(work, filp);
3079 	if (IS_ERR(fp)) {
3080 		fput(filp);
3081 		rc = PTR_ERR(fp);
3082 		fp = NULL;
3083 		goto err_out;
3084 	}
3085 
3086 	/* Get Persistent-ID */
3087 	ksmbd_open_durable_fd(fp);
3088 	if (!has_file_id(fp->persistent_id)) {
3089 		rc = -ENOMEM;
3090 		goto err_out;
3091 	}
3092 
3093 	fp->cdoption = req->CreateDisposition;
3094 	fp->daccess = daccess;
3095 	fp->saccess = req->ShareAccess;
3096 	fp->coption = req->CreateOptions;
3097 
3098 	/* Set default windows and posix acls if creating new file */
3099 	if (created) {
3100 		int posix_acl_rc;
3101 		struct inode *inode = d_inode(path.dentry);
3102 
3103 		posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
3104 							   &path,
3105 							   d_inode(path.dentry->d_parent));
3106 		if (posix_acl_rc)
3107 			ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
3108 
3109 		if (test_share_config_flag(work->tcon->share_conf,
3110 					   KSMBD_SHARE_FLAG_ACL_XATTR)) {
3111 			rc = smb_inherit_dacl(conn, &path, sess->user->uid,
3112 					      sess->user->gid);
3113 		}
3114 
3115 		if (rc) {
3116 			rc = smb2_create_sd_buffer(work, req, &path);
3117 			if (rc) {
3118 				if (posix_acl_rc)
3119 					ksmbd_vfs_set_init_posix_acl(idmap,
3120 								     &path);
3121 
3122 				if (test_share_config_flag(work->tcon->share_conf,
3123 							   KSMBD_SHARE_FLAG_ACL_XATTR)) {
3124 					struct smb_fattr fattr;
3125 					struct smb_ntsd *pntsd;
3126 					int pntsd_size, ace_num = 0;
3127 
3128 					ksmbd_acls_fattr(&fattr, idmap, inode);
3129 					if (fattr.cf_acls)
3130 						ace_num = fattr.cf_acls->a_count;
3131 					if (fattr.cf_dacls)
3132 						ace_num += fattr.cf_dacls->a_count;
3133 
3134 					pntsd = kmalloc(sizeof(struct smb_ntsd) +
3135 							sizeof(struct smb_sid) * 3 +
3136 							sizeof(struct smb_acl) +
3137 							sizeof(struct smb_ace) * ace_num * 2,
3138 							GFP_KERNEL);
3139 					if (!pntsd) {
3140 						posix_acl_release(fattr.cf_acls);
3141 						posix_acl_release(fattr.cf_dacls);
3142 						goto err_out;
3143 					}
3144 
3145 					rc = build_sec_desc(idmap,
3146 							    pntsd, NULL, 0,
3147 							    OWNER_SECINFO |
3148 							    GROUP_SECINFO |
3149 							    DACL_SECINFO,
3150 							    &pntsd_size, &fattr);
3151 					posix_acl_release(fattr.cf_acls);
3152 					posix_acl_release(fattr.cf_dacls);
3153 					if (rc) {
3154 						kfree(pntsd);
3155 						goto err_out;
3156 					}
3157 
3158 					rc = ksmbd_vfs_set_sd_xattr(conn,
3159 								    idmap,
3160 								    &path,
3161 								    pntsd,
3162 								    pntsd_size,
3163 								    false);
3164 					kfree(pntsd);
3165 					if (rc)
3166 						pr_err("failed to store ntacl in xattr : %d\n",
3167 						       rc);
3168 				}
3169 			}
3170 		}
3171 		rc = 0;
3172 	}
3173 
3174 	if (stream_name) {
3175 		rc = smb2_set_stream_name_xattr(&path,
3176 						fp,
3177 						stream_name,
3178 						s_type);
3179 		if (rc)
3180 			goto err_out;
3181 		file_info = FILE_CREATED;
3182 	}
3183 
3184 	fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3185 			FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3186 
3187 	/* fp should be searchable through ksmbd_inode.m_fp_list
3188 	 * after daccess, saccess, attrib_only, and stream are
3189 	 * initialized.
3190 	 */
3191 	write_lock(&fp->f_ci->m_lock);
3192 	list_add(&fp->node, &fp->f_ci->m_fp_list);
3193 	write_unlock(&fp->f_ci->m_lock);
3194 
3195 	/* Check delete pending among previous fp before oplock break */
3196 	if (ksmbd_inode_pending_delete(fp)) {
3197 		rc = -EBUSY;
3198 		goto err_out;
3199 	}
3200 
3201 	if (file_present || created)
3202 		ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3203 
3204 	if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3205 	    !fp->attrib_only && !stream_name) {
3206 		smb_break_all_oplock(work, fp);
3207 		need_truncate = 1;
3208 	}
3209 
3210 	req_op_level = req->RequestedOplockLevel;
3211 	if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
3212 		lc = parse_lease_state(req, S_ISDIR(file_inode(filp)->i_mode));
3213 
3214 	share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3215 	if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3216 	    (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3217 	     !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3218 		if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3219 			rc = share_ret;
3220 			goto err_out1;
3221 		}
3222 	} else {
3223 		if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3224 			/*
3225 			 * Compare parent lease using parent key. If there is no
3226 			 * a lease that has same parent key, Send lease break
3227 			 * notification.
3228 			 */
3229 			smb_send_parent_lease_break_noti(fp, lc);
3230 
3231 			req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3232 			ksmbd_debug(SMB,
3233 				    "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3234 				    name, req_op_level, lc->req_state);
3235 			rc = find_same_lease_key(sess, fp->f_ci, lc);
3236 			if (rc)
3237 				goto err_out1;
3238 		} else if (open_flags == O_RDONLY &&
3239 			   (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3240 			    req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3241 			req_op_level = SMB2_OPLOCK_LEVEL_II;
3242 
3243 		rc = smb_grant_oplock(work, req_op_level,
3244 				      fp->persistent_id, fp,
3245 				      le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3246 				      lc, share_ret);
3247 		if (rc < 0)
3248 			goto err_out1;
3249 	}
3250 
3251 	if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3252 		ksmbd_fd_set_delete_on_close(fp, file_info);
3253 
3254 	if (need_truncate) {
3255 		rc = smb2_create_truncate(&fp->filp->f_path);
3256 		if (rc)
3257 			goto err_out1;
3258 	}
3259 
3260 	if (req->CreateContextsOffset) {
3261 		struct create_alloc_size_req *az_req;
3262 
3263 		az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3264 					SMB2_CREATE_ALLOCATION_SIZE, 4);
3265 		if (IS_ERR(az_req)) {
3266 			rc = PTR_ERR(az_req);
3267 			goto err_out1;
3268 		} else if (az_req) {
3269 			loff_t alloc_size;
3270 			int err;
3271 
3272 			if (le16_to_cpu(az_req->ccontext.DataOffset) +
3273 			    le32_to_cpu(az_req->ccontext.DataLength) <
3274 			    sizeof(struct create_alloc_size_req)) {
3275 				rc = -EINVAL;
3276 				goto err_out1;
3277 			}
3278 			alloc_size = le64_to_cpu(az_req->AllocationSize);
3279 			ksmbd_debug(SMB,
3280 				    "request smb2 create allocate size : %llu\n",
3281 				    alloc_size);
3282 			smb_break_all_levII_oplock(work, fp, 1);
3283 			err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3284 					    alloc_size);
3285 			if (err < 0)
3286 				ksmbd_debug(SMB,
3287 					    "vfs_fallocate is failed : %d\n",
3288 					    err);
3289 		}
3290 
3291 		context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
3292 		if (IS_ERR(context)) {
3293 			rc = PTR_ERR(context);
3294 			goto err_out1;
3295 		} else if (context) {
3296 			ksmbd_debug(SMB, "get query on disk id context\n");
3297 			query_disk_id = 1;
3298 		}
3299 	}
3300 
3301 	rc = ksmbd_vfs_getattr(&path, &stat);
3302 	if (rc)
3303 		goto err_out1;
3304 
3305 	if (stat.result_mask & STATX_BTIME)
3306 		fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3307 	else
3308 		fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3309 	if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3310 		fp->f_ci->m_fattr =
3311 			cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3312 
3313 	if (!created)
3314 		smb2_update_xattrs(tcon, &path, fp);
3315 	else
3316 		smb2_new_xattrs(tcon, &path, fp);
3317 
3318 	memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3319 
3320 	rsp->StructureSize = cpu_to_le16(89);
3321 	rcu_read_lock();
3322 	opinfo = rcu_dereference(fp->f_opinfo);
3323 	rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3324 	rcu_read_unlock();
3325 	rsp->Flags = 0;
3326 	rsp->CreateAction = cpu_to_le32(file_info);
3327 	rsp->CreationTime = cpu_to_le64(fp->create_time);
3328 	time = ksmbd_UnixTimeToNT(stat.atime);
3329 	rsp->LastAccessTime = cpu_to_le64(time);
3330 	time = ksmbd_UnixTimeToNT(stat.mtime);
3331 	rsp->LastWriteTime = cpu_to_le64(time);
3332 	time = ksmbd_UnixTimeToNT(stat.ctime);
3333 	rsp->ChangeTime = cpu_to_le64(time);
3334 	rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3335 		cpu_to_le64(stat.blocks << 9);
3336 	rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3337 	rsp->FileAttributes = fp->f_ci->m_fattr;
3338 
3339 	rsp->Reserved2 = 0;
3340 
3341 	rsp->PersistentFileId = fp->persistent_id;
3342 	rsp->VolatileFileId = fp->volatile_id;
3343 
3344 	rsp->CreateContextsOffset = 0;
3345 	rsp->CreateContextsLength = 0;
3346 	iov_len = offsetof(struct smb2_create_rsp, Buffer);
3347 
3348 	/* If lease is request send lease context response */
3349 	if (opinfo && opinfo->is_lease) {
3350 		struct create_context *lease_ccontext;
3351 
3352 		ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3353 			    name, opinfo->o_lease->state);
3354 		rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3355 
3356 		lease_ccontext = (struct create_context *)rsp->Buffer;
3357 		contxt_cnt++;
3358 		create_lease_buf(rsp->Buffer, opinfo->o_lease);
3359 		le32_add_cpu(&rsp->CreateContextsLength,
3360 			     conn->vals->create_lease_size);
3361 		iov_len += conn->vals->create_lease_size;
3362 		next_ptr = &lease_ccontext->Next;
3363 		next_off = conn->vals->create_lease_size;
3364 	}
3365 
3366 	if (maximal_access_ctxt) {
3367 		struct create_context *mxac_ccontext;
3368 
3369 		if (maximal_access == 0)
3370 			ksmbd_vfs_query_maximal_access(idmap,
3371 						       path.dentry,
3372 						       &maximal_access);
3373 		mxac_ccontext = (struct create_context *)(rsp->Buffer +
3374 				le32_to_cpu(rsp->CreateContextsLength));
3375 		contxt_cnt++;
3376 		create_mxac_rsp_buf(rsp->Buffer +
3377 				le32_to_cpu(rsp->CreateContextsLength),
3378 				le32_to_cpu(maximal_access));
3379 		le32_add_cpu(&rsp->CreateContextsLength,
3380 			     conn->vals->create_mxac_size);
3381 		iov_len += conn->vals->create_mxac_size;
3382 		if (next_ptr)
3383 			*next_ptr = cpu_to_le32(next_off);
3384 		next_ptr = &mxac_ccontext->Next;
3385 		next_off = conn->vals->create_mxac_size;
3386 	}
3387 
3388 	if (query_disk_id) {
3389 		struct create_context *disk_id_ccontext;
3390 
3391 		disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3392 				le32_to_cpu(rsp->CreateContextsLength));
3393 		contxt_cnt++;
3394 		create_disk_id_rsp_buf(rsp->Buffer +
3395 				le32_to_cpu(rsp->CreateContextsLength),
3396 				stat.ino, tcon->id);
3397 		le32_add_cpu(&rsp->CreateContextsLength,
3398 			     conn->vals->create_disk_id_size);
3399 		iov_len += conn->vals->create_disk_id_size;
3400 		if (next_ptr)
3401 			*next_ptr = cpu_to_le32(next_off);
3402 		next_ptr = &disk_id_ccontext->Next;
3403 		next_off = conn->vals->create_disk_id_size;
3404 	}
3405 
3406 	if (posix_ctxt) {
3407 		contxt_cnt++;
3408 		create_posix_rsp_buf(rsp->Buffer +
3409 				le32_to_cpu(rsp->CreateContextsLength),
3410 				fp);
3411 		le32_add_cpu(&rsp->CreateContextsLength,
3412 			     conn->vals->create_posix_size);
3413 		iov_len += conn->vals->create_posix_size;
3414 		if (next_ptr)
3415 			*next_ptr = cpu_to_le32(next_off);
3416 	}
3417 
3418 	if (contxt_cnt > 0) {
3419 		rsp->CreateContextsOffset =
3420 			cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3421 	}
3422 
3423 err_out:
3424 	if (rc && (file_present || created))
3425 		ksmbd_vfs_kern_path_unlock(&parent_path, &path);
3426 
3427 err_out1:
3428 	ksmbd_revert_fsids(work);
3429 
3430 err_out2:
3431 	if (!rc) {
3432 		ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
3433 		rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
3434 	}
3435 	if (rc) {
3436 		if (rc == -EINVAL)
3437 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3438 		else if (rc == -EOPNOTSUPP)
3439 			rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3440 		else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3441 			rsp->hdr.Status = STATUS_ACCESS_DENIED;
3442 		else if (rc == -ENOENT)
3443 			rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3444 		else if (rc == -EPERM)
3445 			rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3446 		else if (rc == -EBUSY)
3447 			rsp->hdr.Status = STATUS_DELETE_PENDING;
3448 		else if (rc == -EBADF)
3449 			rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3450 		else if (rc == -ENOEXEC)
3451 			rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3452 		else if (rc == -ENXIO)
3453 			rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3454 		else if (rc == -EEXIST)
3455 			rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3456 		else if (rc == -EMFILE)
3457 			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3458 		if (!rsp->hdr.Status)
3459 			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3460 
3461 		if (fp)
3462 			ksmbd_fd_put(work, fp);
3463 		smb2_set_err_rsp(work);
3464 		ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3465 	}
3466 
3467 	kfree(name);
3468 	kfree(lc);
3469 
3470 	return 0;
3471 }
3472 
readdir_info_level_struct_sz(int info_level)3473 static int readdir_info_level_struct_sz(int info_level)
3474 {
3475 	switch (info_level) {
3476 	case FILE_FULL_DIRECTORY_INFORMATION:
3477 		return sizeof(struct file_full_directory_info);
3478 	case FILE_BOTH_DIRECTORY_INFORMATION:
3479 		return sizeof(struct file_both_directory_info);
3480 	case FILE_DIRECTORY_INFORMATION:
3481 		return sizeof(struct file_directory_info);
3482 	case FILE_NAMES_INFORMATION:
3483 		return sizeof(struct file_names_info);
3484 	case FILEID_FULL_DIRECTORY_INFORMATION:
3485 		return sizeof(struct file_id_full_dir_info);
3486 	case FILEID_BOTH_DIRECTORY_INFORMATION:
3487 		return sizeof(struct file_id_both_directory_info);
3488 	case SMB_FIND_FILE_POSIX_INFO:
3489 		return sizeof(struct smb2_posix_info);
3490 	default:
3491 		return -EOPNOTSUPP;
3492 	}
3493 }
3494 
dentry_name(struct ksmbd_dir_info * d_info,int info_level)3495 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3496 {
3497 	switch (info_level) {
3498 	case FILE_FULL_DIRECTORY_INFORMATION:
3499 	{
3500 		struct file_full_directory_info *ffdinfo;
3501 
3502 		ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3503 		d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3504 		d_info->name = ffdinfo->FileName;
3505 		d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3506 		return 0;
3507 	}
3508 	case FILE_BOTH_DIRECTORY_INFORMATION:
3509 	{
3510 		struct file_both_directory_info *fbdinfo;
3511 
3512 		fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3513 		d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3514 		d_info->name = fbdinfo->FileName;
3515 		d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3516 		return 0;
3517 	}
3518 	case FILE_DIRECTORY_INFORMATION:
3519 	{
3520 		struct file_directory_info *fdinfo;
3521 
3522 		fdinfo = (struct file_directory_info *)d_info->rptr;
3523 		d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3524 		d_info->name = fdinfo->FileName;
3525 		d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3526 		return 0;
3527 	}
3528 	case FILE_NAMES_INFORMATION:
3529 	{
3530 		struct file_names_info *fninfo;
3531 
3532 		fninfo = (struct file_names_info *)d_info->rptr;
3533 		d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3534 		d_info->name = fninfo->FileName;
3535 		d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3536 		return 0;
3537 	}
3538 	case FILEID_FULL_DIRECTORY_INFORMATION:
3539 	{
3540 		struct file_id_full_dir_info *dinfo;
3541 
3542 		dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3543 		d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3544 		d_info->name = dinfo->FileName;
3545 		d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3546 		return 0;
3547 	}
3548 	case FILEID_BOTH_DIRECTORY_INFORMATION:
3549 	{
3550 		struct file_id_both_directory_info *fibdinfo;
3551 
3552 		fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3553 		d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3554 		d_info->name = fibdinfo->FileName;
3555 		d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3556 		return 0;
3557 	}
3558 	case SMB_FIND_FILE_POSIX_INFO:
3559 	{
3560 		struct smb2_posix_info *posix_info;
3561 
3562 		posix_info = (struct smb2_posix_info *)d_info->rptr;
3563 		d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3564 		d_info->name = posix_info->name;
3565 		d_info->name_len = le32_to_cpu(posix_info->name_len);
3566 		return 0;
3567 	}
3568 	default:
3569 		return -EINVAL;
3570 	}
3571 }
3572 
3573 /**
3574  * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3575  * buffer
3576  * @conn:	connection instance
3577  * @info_level:	smb information level
3578  * @d_info:	structure included variables for query dir
3579  * @ksmbd_kstat:	ksmbd wrapper of dirent stat information
3580  *
3581  * if directory has many entries, find first can't read it fully.
3582  * find next might be called multiple times to read remaining dir entries
3583  *
3584  * Return:	0 on success, otherwise error
3585  */
smb2_populate_readdir_entry(struct ksmbd_conn * conn,int info_level,struct ksmbd_dir_info * d_info,struct ksmbd_kstat * ksmbd_kstat)3586 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3587 				       struct ksmbd_dir_info *d_info,
3588 				       struct ksmbd_kstat *ksmbd_kstat)
3589 {
3590 	int next_entry_offset = 0;
3591 	char *conv_name;
3592 	int conv_len;
3593 	void *kstat;
3594 	int struct_sz, rc = 0;
3595 
3596 	conv_name = ksmbd_convert_dir_info_name(d_info,
3597 						conn->local_nls,
3598 						&conv_len);
3599 	if (!conv_name)
3600 		return -ENOMEM;
3601 
3602 	/* Somehow the name has only terminating NULL bytes */
3603 	if (conv_len < 0) {
3604 		rc = -EINVAL;
3605 		goto free_conv_name;
3606 	}
3607 
3608 	struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
3609 	next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3610 	d_info->last_entry_off_align = next_entry_offset - struct_sz;
3611 
3612 	if (next_entry_offset > d_info->out_buf_len) {
3613 		d_info->out_buf_len = 0;
3614 		rc = -ENOSPC;
3615 		goto free_conv_name;
3616 	}
3617 
3618 	kstat = d_info->wptr;
3619 	if (info_level != FILE_NAMES_INFORMATION)
3620 		kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3621 
3622 	switch (info_level) {
3623 	case FILE_FULL_DIRECTORY_INFORMATION:
3624 	{
3625 		struct file_full_directory_info *ffdinfo;
3626 
3627 		ffdinfo = (struct file_full_directory_info *)kstat;
3628 		ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3629 		ffdinfo->EaSize =
3630 			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3631 		if (ffdinfo->EaSize)
3632 			ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3633 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3634 			ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3635 		memcpy(ffdinfo->FileName, conv_name, conv_len);
3636 		ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3637 		break;
3638 	}
3639 	case FILE_BOTH_DIRECTORY_INFORMATION:
3640 	{
3641 		struct file_both_directory_info *fbdinfo;
3642 
3643 		fbdinfo = (struct file_both_directory_info *)kstat;
3644 		fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3645 		fbdinfo->EaSize =
3646 			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3647 		if (fbdinfo->EaSize)
3648 			fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3649 		fbdinfo->ShortNameLength = 0;
3650 		fbdinfo->Reserved = 0;
3651 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3652 			fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3653 		memcpy(fbdinfo->FileName, conv_name, conv_len);
3654 		fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3655 		break;
3656 	}
3657 	case FILE_DIRECTORY_INFORMATION:
3658 	{
3659 		struct file_directory_info *fdinfo;
3660 
3661 		fdinfo = (struct file_directory_info *)kstat;
3662 		fdinfo->FileNameLength = cpu_to_le32(conv_len);
3663 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3664 			fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3665 		memcpy(fdinfo->FileName, conv_name, conv_len);
3666 		fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3667 		break;
3668 	}
3669 	case FILE_NAMES_INFORMATION:
3670 	{
3671 		struct file_names_info *fninfo;
3672 
3673 		fninfo = (struct file_names_info *)kstat;
3674 		fninfo->FileNameLength = cpu_to_le32(conv_len);
3675 		memcpy(fninfo->FileName, conv_name, conv_len);
3676 		fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3677 		break;
3678 	}
3679 	case FILEID_FULL_DIRECTORY_INFORMATION:
3680 	{
3681 		struct file_id_full_dir_info *dinfo;
3682 
3683 		dinfo = (struct file_id_full_dir_info *)kstat;
3684 		dinfo->FileNameLength = cpu_to_le32(conv_len);
3685 		dinfo->EaSize =
3686 			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3687 		if (dinfo->EaSize)
3688 			dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3689 		dinfo->Reserved = 0;
3690 		dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3691 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3692 			dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3693 		memcpy(dinfo->FileName, conv_name, conv_len);
3694 		dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3695 		break;
3696 	}
3697 	case FILEID_BOTH_DIRECTORY_INFORMATION:
3698 	{
3699 		struct file_id_both_directory_info *fibdinfo;
3700 
3701 		fibdinfo = (struct file_id_both_directory_info *)kstat;
3702 		fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3703 		fibdinfo->EaSize =
3704 			smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3705 		if (fibdinfo->EaSize)
3706 			fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3707 		fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3708 		fibdinfo->ShortNameLength = 0;
3709 		fibdinfo->Reserved = 0;
3710 		fibdinfo->Reserved2 = cpu_to_le16(0);
3711 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3712 			fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3713 		memcpy(fibdinfo->FileName, conv_name, conv_len);
3714 		fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3715 		break;
3716 	}
3717 	case SMB_FIND_FILE_POSIX_INFO:
3718 	{
3719 		struct smb2_posix_info *posix_info;
3720 		u64 time;
3721 
3722 		posix_info = (struct smb2_posix_info *)kstat;
3723 		posix_info->Ignored = 0;
3724 		posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3725 		time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3726 		posix_info->ChangeTime = cpu_to_le64(time);
3727 		time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3728 		posix_info->LastAccessTime = cpu_to_le64(time);
3729 		time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3730 		posix_info->LastWriteTime = cpu_to_le64(time);
3731 		posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3732 		posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3733 		posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3734 		posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3735 		posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3736 		posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3737 		posix_info->DosAttributes =
3738 			S_ISDIR(ksmbd_kstat->kstat->mode) ?
3739 				FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3740 		if (d_info->hide_dot_file && d_info->name[0] == '.')
3741 			posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3742 		/*
3743 		 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3744 		 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3745 		 *		  sub_auth(4 * 1(num_subauth)) + RID(4).
3746 		 */
3747 		id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3748 			  SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3749 		id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3750 			  SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3751 		memcpy(posix_info->name, conv_name, conv_len);
3752 		posix_info->name_len = cpu_to_le32(conv_len);
3753 		posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3754 		break;
3755 	}
3756 
3757 	} /* switch (info_level) */
3758 
3759 	d_info->last_entry_offset = d_info->data_count;
3760 	d_info->data_count += next_entry_offset;
3761 	d_info->out_buf_len -= next_entry_offset;
3762 	d_info->wptr += next_entry_offset;
3763 
3764 	ksmbd_debug(SMB,
3765 		    "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3766 		    info_level, d_info->out_buf_len,
3767 		    next_entry_offset, d_info->data_count);
3768 
3769 free_conv_name:
3770 	kfree(conv_name);
3771 	return rc;
3772 }
3773 
3774 struct smb2_query_dir_private {
3775 	struct ksmbd_work	*work;
3776 	char			*search_pattern;
3777 	struct ksmbd_file	*dir_fp;
3778 
3779 	struct ksmbd_dir_info	*d_info;
3780 	int			info_level;
3781 };
3782 
lock_dir(struct ksmbd_file * dir_fp)3783 static void lock_dir(struct ksmbd_file *dir_fp)
3784 {
3785 	struct dentry *dir = dir_fp->filp->f_path.dentry;
3786 
3787 	inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3788 }
3789 
unlock_dir(struct ksmbd_file * dir_fp)3790 static void unlock_dir(struct ksmbd_file *dir_fp)
3791 {
3792 	struct dentry *dir = dir_fp->filp->f_path.dentry;
3793 
3794 	inode_unlock(d_inode(dir));
3795 }
3796 
process_query_dir_entries(struct smb2_query_dir_private * priv)3797 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3798 {
3799 	struct mnt_idmap	*idmap = file_mnt_idmap(priv->dir_fp->filp);
3800 	struct kstat		kstat;
3801 	struct ksmbd_kstat	ksmbd_kstat;
3802 	int			rc;
3803 	int			i;
3804 
3805 	for (i = 0; i < priv->d_info->num_entry; i++) {
3806 		struct dentry *dent;
3807 
3808 		if (dentry_name(priv->d_info, priv->info_level))
3809 			return -EINVAL;
3810 
3811 		lock_dir(priv->dir_fp);
3812 		dent = lookup_one(idmap, priv->d_info->name,
3813 				  priv->dir_fp->filp->f_path.dentry,
3814 				  priv->d_info->name_len);
3815 		unlock_dir(priv->dir_fp);
3816 
3817 		if (IS_ERR(dent)) {
3818 			ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3819 				    priv->d_info->name,
3820 				    PTR_ERR(dent));
3821 			continue;
3822 		}
3823 		if (unlikely(d_is_negative(dent))) {
3824 			dput(dent);
3825 			ksmbd_debug(SMB, "Negative dentry `%s'\n",
3826 				    priv->d_info->name);
3827 			continue;
3828 		}
3829 
3830 		ksmbd_kstat.kstat = &kstat;
3831 		if (priv->info_level != FILE_NAMES_INFORMATION)
3832 			ksmbd_vfs_fill_dentry_attrs(priv->work,
3833 						    idmap,
3834 						    dent,
3835 						    &ksmbd_kstat);
3836 
3837 		rc = smb2_populate_readdir_entry(priv->work->conn,
3838 						 priv->info_level,
3839 						 priv->d_info,
3840 						 &ksmbd_kstat);
3841 		dput(dent);
3842 		if (rc)
3843 			return rc;
3844 	}
3845 	return 0;
3846 }
3847 
reserve_populate_dentry(struct ksmbd_dir_info * d_info,int info_level)3848 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3849 				   int info_level)
3850 {
3851 	int struct_sz;
3852 	int conv_len;
3853 	int next_entry_offset;
3854 
3855 	struct_sz = readdir_info_level_struct_sz(info_level);
3856 	if (struct_sz == -EOPNOTSUPP)
3857 		return -EOPNOTSUPP;
3858 
3859 	conv_len = (d_info->name_len + 1) * 2;
3860 	next_entry_offset = ALIGN(struct_sz + conv_len,
3861 				  KSMBD_DIR_INFO_ALIGNMENT);
3862 
3863 	if (next_entry_offset > d_info->out_buf_len) {
3864 		d_info->out_buf_len = 0;
3865 		return -ENOSPC;
3866 	}
3867 
3868 	switch (info_level) {
3869 	case FILE_FULL_DIRECTORY_INFORMATION:
3870 	{
3871 		struct file_full_directory_info *ffdinfo;
3872 
3873 		ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3874 		memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3875 		ffdinfo->FileName[d_info->name_len] = 0x00;
3876 		ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3877 		ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3878 		break;
3879 	}
3880 	case FILE_BOTH_DIRECTORY_INFORMATION:
3881 	{
3882 		struct file_both_directory_info *fbdinfo;
3883 
3884 		fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3885 		memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3886 		fbdinfo->FileName[d_info->name_len] = 0x00;
3887 		fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3888 		fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3889 		break;
3890 	}
3891 	case FILE_DIRECTORY_INFORMATION:
3892 	{
3893 		struct file_directory_info *fdinfo;
3894 
3895 		fdinfo = (struct file_directory_info *)d_info->wptr;
3896 		memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3897 		fdinfo->FileName[d_info->name_len] = 0x00;
3898 		fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3899 		fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3900 		break;
3901 	}
3902 	case FILE_NAMES_INFORMATION:
3903 	{
3904 		struct file_names_info *fninfo;
3905 
3906 		fninfo = (struct file_names_info *)d_info->wptr;
3907 		memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3908 		fninfo->FileName[d_info->name_len] = 0x00;
3909 		fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3910 		fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3911 		break;
3912 	}
3913 	case FILEID_FULL_DIRECTORY_INFORMATION:
3914 	{
3915 		struct file_id_full_dir_info *dinfo;
3916 
3917 		dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3918 		memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3919 		dinfo->FileName[d_info->name_len] = 0x00;
3920 		dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3921 		dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3922 		break;
3923 	}
3924 	case FILEID_BOTH_DIRECTORY_INFORMATION:
3925 	{
3926 		struct file_id_both_directory_info *fibdinfo;
3927 
3928 		fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3929 		memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3930 		fibdinfo->FileName[d_info->name_len] = 0x00;
3931 		fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3932 		fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3933 		break;
3934 	}
3935 	case SMB_FIND_FILE_POSIX_INFO:
3936 	{
3937 		struct smb2_posix_info *posix_info;
3938 
3939 		posix_info = (struct smb2_posix_info *)d_info->wptr;
3940 		memcpy(posix_info->name, d_info->name, d_info->name_len);
3941 		posix_info->name[d_info->name_len] = 0x00;
3942 		posix_info->name_len = cpu_to_le32(d_info->name_len);
3943 		posix_info->NextEntryOffset =
3944 			cpu_to_le32(next_entry_offset);
3945 		break;
3946 	}
3947 	} /* switch (info_level) */
3948 
3949 	d_info->num_entry++;
3950 	d_info->out_buf_len -= next_entry_offset;
3951 	d_info->wptr += next_entry_offset;
3952 	return 0;
3953 }
3954 
__query_dir(struct dir_context * ctx,const char * name,int namlen,loff_t offset,u64 ino,unsigned int d_type)3955 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3956 		       loff_t offset, u64 ino, unsigned int d_type)
3957 {
3958 	struct ksmbd_readdir_data	*buf;
3959 	struct smb2_query_dir_private	*priv;
3960 	struct ksmbd_dir_info		*d_info;
3961 	int				rc;
3962 
3963 	buf	= container_of(ctx, struct ksmbd_readdir_data, ctx);
3964 	priv	= buf->private;
3965 	d_info	= priv->d_info;
3966 
3967 	/* dot and dotdot entries are already reserved */
3968 	if (!strcmp(".", name) || !strcmp("..", name))
3969 		return true;
3970 	if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3971 		return true;
3972 	if (!match_pattern(name, namlen, priv->search_pattern))
3973 		return true;
3974 
3975 	d_info->name		= name;
3976 	d_info->name_len	= namlen;
3977 	rc = reserve_populate_dentry(d_info, priv->info_level);
3978 	if (rc)
3979 		return false;
3980 	if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3981 		d_info->out_buf_len = 0;
3982 	return true;
3983 }
3984 
verify_info_level(int info_level)3985 static int verify_info_level(int info_level)
3986 {
3987 	switch (info_level) {
3988 	case FILE_FULL_DIRECTORY_INFORMATION:
3989 	case FILE_BOTH_DIRECTORY_INFORMATION:
3990 	case FILE_DIRECTORY_INFORMATION:
3991 	case FILE_NAMES_INFORMATION:
3992 	case FILEID_FULL_DIRECTORY_INFORMATION:
3993 	case FILEID_BOTH_DIRECTORY_INFORMATION:
3994 	case SMB_FIND_FILE_POSIX_INFO:
3995 		break;
3996 	default:
3997 		return -EOPNOTSUPP;
3998 	}
3999 
4000 	return 0;
4001 }
4002 
smb2_resp_buf_len(struct ksmbd_work * work,unsigned short hdr2_len)4003 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
4004 {
4005 	int free_len;
4006 
4007 	free_len = (int)(work->response_sz -
4008 		(get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
4009 	return free_len;
4010 }
4011 
smb2_calc_max_out_buf_len(struct ksmbd_work * work,unsigned short hdr2_len,unsigned int out_buf_len)4012 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
4013 				     unsigned short hdr2_len,
4014 				     unsigned int out_buf_len)
4015 {
4016 	int free_len;
4017 
4018 	if (out_buf_len > work->conn->vals->max_trans_size)
4019 		return -EINVAL;
4020 
4021 	free_len = smb2_resp_buf_len(work, hdr2_len);
4022 	if (free_len < 0)
4023 		return -EINVAL;
4024 
4025 	return min_t(int, out_buf_len, free_len);
4026 }
4027 
smb2_query_dir(struct ksmbd_work * work)4028 int smb2_query_dir(struct ksmbd_work *work)
4029 {
4030 	struct ksmbd_conn *conn = work->conn;
4031 	struct smb2_query_directory_req *req;
4032 	struct smb2_query_directory_rsp *rsp;
4033 	struct ksmbd_share_config *share = work->tcon->share_conf;
4034 	struct ksmbd_file *dir_fp = NULL;
4035 	struct ksmbd_dir_info d_info;
4036 	int rc = 0;
4037 	char *srch_ptr = NULL;
4038 	unsigned char srch_flag;
4039 	int buffer_sz;
4040 	struct smb2_query_dir_private query_dir_private = {NULL, };
4041 
4042 	WORK_BUFFERS(work, req, rsp);
4043 
4044 	if (ksmbd_override_fsids(work)) {
4045 		rsp->hdr.Status = STATUS_NO_MEMORY;
4046 		smb2_set_err_rsp(work);
4047 		return -ENOMEM;
4048 	}
4049 
4050 	rc = verify_info_level(req->FileInformationClass);
4051 	if (rc) {
4052 		rc = -EFAULT;
4053 		goto err_out2;
4054 	}
4055 
4056 	dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
4057 	if (!dir_fp) {
4058 		rc = -EBADF;
4059 		goto err_out2;
4060 	}
4061 
4062 	if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
4063 	    inode_permission(file_mnt_idmap(dir_fp->filp),
4064 			     file_inode(dir_fp->filp),
4065 			     MAY_READ | MAY_EXEC)) {
4066 		pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
4067 		rc = -EACCES;
4068 		goto err_out2;
4069 	}
4070 
4071 	if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
4072 		pr_err("can't do query dir for a file\n");
4073 		rc = -EINVAL;
4074 		goto err_out2;
4075 	}
4076 
4077 	srch_flag = req->Flags;
4078 	srch_ptr = smb_strndup_from_utf16(req->Buffer,
4079 					  le16_to_cpu(req->FileNameLength), 1,
4080 					  conn->local_nls);
4081 	if (IS_ERR(srch_ptr)) {
4082 		ksmbd_debug(SMB, "Search Pattern not found\n");
4083 		rc = -EINVAL;
4084 		goto err_out2;
4085 	} else {
4086 		ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
4087 	}
4088 
4089 	if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
4090 		ksmbd_debug(SMB, "Restart directory scan\n");
4091 		generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
4092 	}
4093 
4094 	memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
4095 	d_info.wptr = (char *)rsp->Buffer;
4096 	d_info.rptr = (char *)rsp->Buffer;
4097 	d_info.out_buf_len =
4098 		smb2_calc_max_out_buf_len(work, 8,
4099 					  le32_to_cpu(req->OutputBufferLength));
4100 	if (d_info.out_buf_len < 0) {
4101 		rc = -EINVAL;
4102 		goto err_out;
4103 	}
4104 	d_info.flags = srch_flag;
4105 
4106 	/*
4107 	 * reserve dot and dotdot entries in head of buffer
4108 	 * in first response
4109 	 */
4110 	rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
4111 					       dir_fp, &d_info, srch_ptr,
4112 					       smb2_populate_readdir_entry);
4113 	if (rc == -ENOSPC)
4114 		rc = 0;
4115 	else if (rc)
4116 		goto err_out;
4117 
4118 	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
4119 		d_info.hide_dot_file = true;
4120 
4121 	buffer_sz				= d_info.out_buf_len;
4122 	d_info.rptr				= d_info.wptr;
4123 	query_dir_private.work			= work;
4124 	query_dir_private.search_pattern	= srch_ptr;
4125 	query_dir_private.dir_fp		= dir_fp;
4126 	query_dir_private.d_info		= &d_info;
4127 	query_dir_private.info_level		= req->FileInformationClass;
4128 	dir_fp->readdir_data.private		= &query_dir_private;
4129 	set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
4130 
4131 	rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
4132 	/*
4133 	 * req->OutputBufferLength is too small to contain even one entry.
4134 	 * In this case, it immediately returns OutputBufferLength 0 to client.
4135 	 */
4136 	if (!d_info.out_buf_len && !d_info.num_entry)
4137 		goto no_buf_len;
4138 	if (rc > 0 || rc == -ENOSPC)
4139 		rc = 0;
4140 	else if (rc)
4141 		goto err_out;
4142 
4143 	d_info.wptr = d_info.rptr;
4144 	d_info.out_buf_len = buffer_sz;
4145 	rc = process_query_dir_entries(&query_dir_private);
4146 	if (rc)
4147 		goto err_out;
4148 
4149 	if (!d_info.data_count && d_info.out_buf_len >= 0) {
4150 		if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
4151 			rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4152 		} else {
4153 			dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
4154 			rsp->hdr.Status = STATUS_NO_MORE_FILES;
4155 		}
4156 		rsp->StructureSize = cpu_to_le16(9);
4157 		rsp->OutputBufferOffset = cpu_to_le16(0);
4158 		rsp->OutputBufferLength = cpu_to_le32(0);
4159 		rsp->Buffer[0] = 0;
4160 		rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4161 				       sizeof(struct smb2_query_directory_rsp));
4162 		if (rc)
4163 			goto err_out;
4164 	} else {
4165 no_buf_len:
4166 		((struct file_directory_info *)
4167 		((char *)rsp->Buffer + d_info.last_entry_offset))
4168 		->NextEntryOffset = 0;
4169 		if (d_info.data_count >= d_info.last_entry_off_align)
4170 			d_info.data_count -= d_info.last_entry_off_align;
4171 
4172 		rsp->StructureSize = cpu_to_le16(9);
4173 		rsp->OutputBufferOffset = cpu_to_le16(72);
4174 		rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4175 		rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
4176 				       offsetof(struct smb2_query_directory_rsp, Buffer) +
4177 				       d_info.data_count);
4178 		if (rc)
4179 			goto err_out;
4180 	}
4181 
4182 	kfree(srch_ptr);
4183 	ksmbd_fd_put(work, dir_fp);
4184 	ksmbd_revert_fsids(work);
4185 	return 0;
4186 
4187 err_out:
4188 	pr_err("error while processing smb2 query dir rc = %d\n", rc);
4189 	kfree(srch_ptr);
4190 
4191 err_out2:
4192 	if (rc == -EINVAL)
4193 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4194 	else if (rc == -EACCES)
4195 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
4196 	else if (rc == -ENOENT)
4197 		rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4198 	else if (rc == -EBADF)
4199 		rsp->hdr.Status = STATUS_FILE_CLOSED;
4200 	else if (rc == -ENOMEM)
4201 		rsp->hdr.Status = STATUS_NO_MEMORY;
4202 	else if (rc == -EFAULT)
4203 		rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4204 	else if (rc == -EIO)
4205 		rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4206 	if (!rsp->hdr.Status)
4207 		rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4208 
4209 	smb2_set_err_rsp(work);
4210 	ksmbd_fd_put(work, dir_fp);
4211 	ksmbd_revert_fsids(work);
4212 	return 0;
4213 }
4214 
4215 /**
4216  * buffer_check_err() - helper function to check buffer errors
4217  * @reqOutputBufferLength:	max buffer length expected in command response
4218  * @rsp:		query info response buffer contains output buffer length
4219  * @rsp_org:		base response buffer pointer in case of chained response
4220  *
4221  * Return:	0 on success, otherwise error
4222  */
buffer_check_err(int reqOutputBufferLength,struct smb2_query_info_rsp * rsp,void * rsp_org)4223 static int buffer_check_err(int reqOutputBufferLength,
4224 			    struct smb2_query_info_rsp *rsp,
4225 			    void *rsp_org)
4226 {
4227 	if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4228 		pr_err("Invalid Buffer Size Requested\n");
4229 		rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4230 		*(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4231 		return -EINVAL;
4232 	}
4233 	return 0;
4234 }
4235 
get_standard_info_pipe(struct smb2_query_info_rsp * rsp,void * rsp_org)4236 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4237 				   void *rsp_org)
4238 {
4239 	struct smb2_file_standard_info *sinfo;
4240 
4241 	sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4242 
4243 	sinfo->AllocationSize = cpu_to_le64(4096);
4244 	sinfo->EndOfFile = cpu_to_le64(0);
4245 	sinfo->NumberOfLinks = cpu_to_le32(1);
4246 	sinfo->DeletePending = 1;
4247 	sinfo->Directory = 0;
4248 	rsp->OutputBufferLength =
4249 		cpu_to_le32(sizeof(struct smb2_file_standard_info));
4250 }
4251 
get_internal_info_pipe(struct smb2_query_info_rsp * rsp,u64 num,void * rsp_org)4252 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4253 				   void *rsp_org)
4254 {
4255 	struct smb2_file_internal_info *file_info;
4256 
4257 	file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4258 
4259 	/* any unique number */
4260 	file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4261 	rsp->OutputBufferLength =
4262 		cpu_to_le32(sizeof(struct smb2_file_internal_info));
4263 }
4264 
smb2_get_info_file_pipe(struct ksmbd_session * sess,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4265 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4266 				   struct smb2_query_info_req *req,
4267 				   struct smb2_query_info_rsp *rsp,
4268 				   void *rsp_org)
4269 {
4270 	u64 id;
4271 	int rc;
4272 
4273 	/*
4274 	 * Windows can sometime send query file info request on
4275 	 * pipe without opening it, checking error condition here
4276 	 */
4277 	id = req->VolatileFileId;
4278 	if (!ksmbd_session_rpc_method(sess, id))
4279 		return -ENOENT;
4280 
4281 	ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4282 		    req->FileInfoClass, req->VolatileFileId);
4283 
4284 	switch (req->FileInfoClass) {
4285 	case FILE_STANDARD_INFORMATION:
4286 		get_standard_info_pipe(rsp, rsp_org);
4287 		rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4288 				      rsp, rsp_org);
4289 		break;
4290 	case FILE_INTERNAL_INFORMATION:
4291 		get_internal_info_pipe(rsp, id, rsp_org);
4292 		rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4293 				      rsp, rsp_org);
4294 		break;
4295 	default:
4296 		ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4297 			    req->FileInfoClass);
4298 		rc = -EOPNOTSUPP;
4299 	}
4300 	return rc;
4301 }
4302 
4303 /**
4304  * smb2_get_ea() - handler for smb2 get extended attribute command
4305  * @work:	smb work containing query info command buffer
4306  * @fp:		ksmbd_file pointer
4307  * @req:	get extended attribute request
4308  * @rsp:	response buffer pointer
4309  * @rsp_org:	base response buffer pointer in case of chained response
4310  *
4311  * Return:	0 on success, otherwise error
4312  */
smb2_get_ea(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4313 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4314 		       struct smb2_query_info_req *req,
4315 		       struct smb2_query_info_rsp *rsp, void *rsp_org)
4316 {
4317 	struct smb2_ea_info *eainfo, *prev_eainfo;
4318 	char *name, *ptr, *xattr_list = NULL, *buf;
4319 	int rc, name_len, value_len, xattr_list_len, idx;
4320 	ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4321 	struct smb2_ea_info_req *ea_req = NULL;
4322 	const struct path *path;
4323 	struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4324 
4325 	if (!(fp->daccess & FILE_READ_EA_LE)) {
4326 		pr_err("Not permitted to read ext attr : 0x%x\n",
4327 		       fp->daccess);
4328 		return -EACCES;
4329 	}
4330 
4331 	path = &fp->filp->f_path;
4332 	/* single EA entry is requested with given user.* name */
4333 	if (req->InputBufferLength) {
4334 		if (le32_to_cpu(req->InputBufferLength) <
4335 		    sizeof(struct smb2_ea_info_req))
4336 			return -EINVAL;
4337 
4338 		ea_req = (struct smb2_ea_info_req *)req->Buffer;
4339 	} else {
4340 		/* need to send all EAs, if no specific EA is requested*/
4341 		if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4342 			ksmbd_debug(SMB,
4343 				    "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4344 				    le32_to_cpu(req->Flags));
4345 	}
4346 
4347 	buf_free_len =
4348 		smb2_calc_max_out_buf_len(work, 8,
4349 					  le32_to_cpu(req->OutputBufferLength));
4350 	if (buf_free_len < 0)
4351 		return -EINVAL;
4352 
4353 	rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4354 	if (rc < 0) {
4355 		rsp->hdr.Status = STATUS_INVALID_HANDLE;
4356 		goto out;
4357 	} else if (!rc) { /* there is no EA in the file */
4358 		ksmbd_debug(SMB, "no ea data in the file\n");
4359 		goto done;
4360 	}
4361 	xattr_list_len = rc;
4362 
4363 	ptr = (char *)rsp->Buffer;
4364 	eainfo = (struct smb2_ea_info *)ptr;
4365 	prev_eainfo = eainfo;
4366 	idx = 0;
4367 
4368 	while (idx < xattr_list_len) {
4369 		name = xattr_list + idx;
4370 		name_len = strlen(name);
4371 
4372 		ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4373 		idx += name_len + 1;
4374 
4375 		/*
4376 		 * CIFS does not support EA other than user.* namespace,
4377 		 * still keep the framework generic, to list other attrs
4378 		 * in future.
4379 		 */
4380 		if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4381 			continue;
4382 
4383 		if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4384 			     STREAM_PREFIX_LEN))
4385 			continue;
4386 
4387 		if (req->InputBufferLength &&
4388 		    strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4389 			    ea_req->EaNameLength))
4390 			continue;
4391 
4392 		if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4393 			     DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4394 			continue;
4395 
4396 		if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4397 			name_len -= XATTR_USER_PREFIX_LEN;
4398 
4399 		ptr = eainfo->name + name_len + 1;
4400 		buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4401 				name_len + 1);
4402 		/* bailout if xattr can't fit in buf_free_len */
4403 		value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
4404 					       name, &buf);
4405 		if (value_len <= 0) {
4406 			rc = -ENOENT;
4407 			rsp->hdr.Status = STATUS_INVALID_HANDLE;
4408 			goto out;
4409 		}
4410 
4411 		buf_free_len -= value_len;
4412 		if (buf_free_len < 0) {
4413 			kfree(buf);
4414 			break;
4415 		}
4416 
4417 		memcpy(ptr, buf, value_len);
4418 		kfree(buf);
4419 
4420 		ptr += value_len;
4421 		eainfo->Flags = 0;
4422 		eainfo->EaNameLength = name_len;
4423 
4424 		if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4425 			memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4426 			       name_len);
4427 		else
4428 			memcpy(eainfo->name, name, name_len);
4429 
4430 		eainfo->name[name_len] = '\0';
4431 		eainfo->EaValueLength = cpu_to_le16(value_len);
4432 		next_offset = offsetof(struct smb2_ea_info, name) +
4433 			name_len + 1 + value_len;
4434 
4435 		/* align next xattr entry at 4 byte bundary */
4436 		alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4437 		if (alignment_bytes) {
4438 			memset(ptr, '\0', alignment_bytes);
4439 			ptr += alignment_bytes;
4440 			next_offset += alignment_bytes;
4441 			buf_free_len -= alignment_bytes;
4442 		}
4443 		eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4444 		prev_eainfo = eainfo;
4445 		eainfo = (struct smb2_ea_info *)ptr;
4446 		rsp_data_cnt += next_offset;
4447 
4448 		if (req->InputBufferLength) {
4449 			ksmbd_debug(SMB, "single entry requested\n");
4450 			break;
4451 		}
4452 	}
4453 
4454 	/* no more ea entries */
4455 	prev_eainfo->NextEntryOffset = 0;
4456 done:
4457 	rc = 0;
4458 	if (rsp_data_cnt == 0)
4459 		rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4460 	rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4461 out:
4462 	kvfree(xattr_list);
4463 	return rc;
4464 }
4465 
get_file_access_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4466 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4467 				 struct ksmbd_file *fp, void *rsp_org)
4468 {
4469 	struct smb2_file_access_info *file_info;
4470 
4471 	file_info = (struct smb2_file_access_info *)rsp->Buffer;
4472 	file_info->AccessFlags = fp->daccess;
4473 	rsp->OutputBufferLength =
4474 		cpu_to_le32(sizeof(struct smb2_file_access_info));
4475 }
4476 
get_file_basic_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4477 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4478 			       struct ksmbd_file *fp, void *rsp_org)
4479 {
4480 	struct smb2_file_basic_info *basic_info;
4481 	struct kstat stat;
4482 	u64 time;
4483 
4484 	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4485 		pr_err("no right to read the attributes : 0x%x\n",
4486 		       fp->daccess);
4487 		return -EACCES;
4488 	}
4489 
4490 	basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4491 	generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4492 			 file_inode(fp->filp), &stat);
4493 	basic_info->CreationTime = cpu_to_le64(fp->create_time);
4494 	time = ksmbd_UnixTimeToNT(stat.atime);
4495 	basic_info->LastAccessTime = cpu_to_le64(time);
4496 	time = ksmbd_UnixTimeToNT(stat.mtime);
4497 	basic_info->LastWriteTime = cpu_to_le64(time);
4498 	time = ksmbd_UnixTimeToNT(stat.ctime);
4499 	basic_info->ChangeTime = cpu_to_le64(time);
4500 	basic_info->Attributes = fp->f_ci->m_fattr;
4501 	basic_info->Pad1 = 0;
4502 	rsp->OutputBufferLength =
4503 		cpu_to_le32(sizeof(struct smb2_file_basic_info));
4504 	return 0;
4505 }
4506 
get_file_standard_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4507 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4508 				   struct ksmbd_file *fp, void *rsp_org)
4509 {
4510 	struct smb2_file_standard_info *sinfo;
4511 	unsigned int delete_pending;
4512 	struct inode *inode;
4513 	struct kstat stat;
4514 
4515 	inode = file_inode(fp->filp);
4516 	generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4517 
4518 	sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4519 	delete_pending = ksmbd_inode_pending_delete(fp);
4520 
4521 	sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4522 	sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4523 	sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4524 	sinfo->DeletePending = delete_pending;
4525 	sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4526 	rsp->OutputBufferLength =
4527 		cpu_to_le32(sizeof(struct smb2_file_standard_info));
4528 }
4529 
get_file_alignment_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4530 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4531 				    void *rsp_org)
4532 {
4533 	struct smb2_file_alignment_info *file_info;
4534 
4535 	file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4536 	file_info->AlignmentRequirement = 0;
4537 	rsp->OutputBufferLength =
4538 		cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4539 }
4540 
get_file_all_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4541 static int get_file_all_info(struct ksmbd_work *work,
4542 			     struct smb2_query_info_rsp *rsp,
4543 			     struct ksmbd_file *fp,
4544 			     void *rsp_org)
4545 {
4546 	struct ksmbd_conn *conn = work->conn;
4547 	struct smb2_file_all_info *file_info;
4548 	unsigned int delete_pending;
4549 	struct inode *inode;
4550 	struct kstat stat;
4551 	int conv_len;
4552 	char *filename;
4553 	u64 time;
4554 
4555 	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4556 		ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4557 			    fp->daccess);
4558 		return -EACCES;
4559 	}
4560 
4561 	filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4562 	if (IS_ERR(filename))
4563 		return PTR_ERR(filename);
4564 
4565 	inode = file_inode(fp->filp);
4566 	generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4567 
4568 	ksmbd_debug(SMB, "filename = %s\n", filename);
4569 	delete_pending = ksmbd_inode_pending_delete(fp);
4570 	file_info = (struct smb2_file_all_info *)rsp->Buffer;
4571 
4572 	file_info->CreationTime = cpu_to_le64(fp->create_time);
4573 	time = ksmbd_UnixTimeToNT(stat.atime);
4574 	file_info->LastAccessTime = cpu_to_le64(time);
4575 	time = ksmbd_UnixTimeToNT(stat.mtime);
4576 	file_info->LastWriteTime = cpu_to_le64(time);
4577 	time = ksmbd_UnixTimeToNT(stat.ctime);
4578 	file_info->ChangeTime = cpu_to_le64(time);
4579 	file_info->Attributes = fp->f_ci->m_fattr;
4580 	file_info->Pad1 = 0;
4581 	file_info->AllocationSize =
4582 		cpu_to_le64(inode->i_blocks << 9);
4583 	file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4584 	file_info->NumberOfLinks =
4585 			cpu_to_le32(get_nlink(&stat) - delete_pending);
4586 	file_info->DeletePending = delete_pending;
4587 	file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4588 	file_info->Pad2 = 0;
4589 	file_info->IndexNumber = cpu_to_le64(stat.ino);
4590 	file_info->EASize = 0;
4591 	file_info->AccessFlags = fp->daccess;
4592 	file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4593 	file_info->Mode = fp->coption;
4594 	file_info->AlignmentRequirement = 0;
4595 	conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4596 				     PATH_MAX, conn->local_nls, 0);
4597 	conv_len *= 2;
4598 	file_info->FileNameLength = cpu_to_le32(conv_len);
4599 	rsp->OutputBufferLength =
4600 		cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4601 	kfree(filename);
4602 	return 0;
4603 }
4604 
get_file_alternate_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4605 static void get_file_alternate_info(struct ksmbd_work *work,
4606 				    struct smb2_query_info_rsp *rsp,
4607 				    struct ksmbd_file *fp,
4608 				    void *rsp_org)
4609 {
4610 	struct ksmbd_conn *conn = work->conn;
4611 	struct smb2_file_alt_name_info *file_info;
4612 	struct dentry *dentry = fp->filp->f_path.dentry;
4613 	int conv_len;
4614 
4615 	spin_lock(&dentry->d_lock);
4616 	file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4617 	conv_len = ksmbd_extract_shortname(conn,
4618 					   dentry->d_name.name,
4619 					   file_info->FileName);
4620 	spin_unlock(&dentry->d_lock);
4621 	file_info->FileNameLength = cpu_to_le32(conv_len);
4622 	rsp->OutputBufferLength =
4623 		cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4624 }
4625 
get_file_stream_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4626 static void get_file_stream_info(struct ksmbd_work *work,
4627 				 struct smb2_query_info_rsp *rsp,
4628 				 struct ksmbd_file *fp,
4629 				 void *rsp_org)
4630 {
4631 	struct ksmbd_conn *conn = work->conn;
4632 	struct smb2_file_stream_info *file_info;
4633 	char *stream_name, *xattr_list = NULL, *stream_buf;
4634 	struct kstat stat;
4635 	const struct path *path = &fp->filp->f_path;
4636 	ssize_t xattr_list_len;
4637 	int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4638 	int buf_free_len;
4639 	struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4640 
4641 	generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4642 			 file_inode(fp->filp), &stat);
4643 	file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4644 
4645 	buf_free_len =
4646 		smb2_calc_max_out_buf_len(work, 8,
4647 					  le32_to_cpu(req->OutputBufferLength));
4648 	if (buf_free_len < 0)
4649 		goto out;
4650 
4651 	xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4652 	if (xattr_list_len < 0) {
4653 		goto out;
4654 	} else if (!xattr_list_len) {
4655 		ksmbd_debug(SMB, "empty xattr in the file\n");
4656 		goto out;
4657 	}
4658 
4659 	while (idx < xattr_list_len) {
4660 		stream_name = xattr_list + idx;
4661 		streamlen = strlen(stream_name);
4662 		idx += streamlen + 1;
4663 
4664 		ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4665 
4666 		if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4667 			    STREAM_PREFIX, STREAM_PREFIX_LEN))
4668 			continue;
4669 
4670 		stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4671 				STREAM_PREFIX_LEN);
4672 		streamlen = stream_name_len;
4673 
4674 		/* plus : size */
4675 		streamlen += 1;
4676 		stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4677 		if (!stream_buf)
4678 			break;
4679 
4680 		streamlen = snprintf(stream_buf, streamlen + 1,
4681 				     ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4682 
4683 		next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4684 		if (next > buf_free_len) {
4685 			kfree(stream_buf);
4686 			break;
4687 		}
4688 
4689 		file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4690 		streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
4691 					       stream_buf, streamlen,
4692 					       conn->local_nls, 0);
4693 		streamlen *= 2;
4694 		kfree(stream_buf);
4695 		file_info->StreamNameLength = cpu_to_le32(streamlen);
4696 		file_info->StreamSize = cpu_to_le64(stream_name_len);
4697 		file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4698 
4699 		nbytes += next;
4700 		buf_free_len -= next;
4701 		file_info->NextEntryOffset = cpu_to_le32(next);
4702 	}
4703 
4704 out:
4705 	if (!S_ISDIR(stat.mode) &&
4706 	    buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4707 		file_info = (struct smb2_file_stream_info *)
4708 			&rsp->Buffer[nbytes];
4709 		streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4710 					      "::$DATA", 7, conn->local_nls, 0);
4711 		streamlen *= 2;
4712 		file_info->StreamNameLength = cpu_to_le32(streamlen);
4713 		file_info->StreamSize = cpu_to_le64(stat.size);
4714 		file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4715 		nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4716 	}
4717 
4718 	/* last entry offset should be 0 */
4719 	file_info->NextEntryOffset = 0;
4720 	kvfree(xattr_list);
4721 
4722 	rsp->OutputBufferLength = cpu_to_le32(nbytes);
4723 }
4724 
get_file_internal_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4725 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4726 				   struct ksmbd_file *fp, void *rsp_org)
4727 {
4728 	struct smb2_file_internal_info *file_info;
4729 	struct kstat stat;
4730 
4731 	generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4732 			 file_inode(fp->filp), &stat);
4733 	file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4734 	file_info->IndexNumber = cpu_to_le64(stat.ino);
4735 	rsp->OutputBufferLength =
4736 		cpu_to_le32(sizeof(struct smb2_file_internal_info));
4737 }
4738 
get_file_network_open_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4739 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4740 				      struct ksmbd_file *fp, void *rsp_org)
4741 {
4742 	struct smb2_file_ntwrk_info *file_info;
4743 	struct inode *inode;
4744 	struct kstat stat;
4745 	u64 time;
4746 
4747 	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4748 		pr_err("no right to read the attributes : 0x%x\n",
4749 		       fp->daccess);
4750 		return -EACCES;
4751 	}
4752 
4753 	file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4754 
4755 	inode = file_inode(fp->filp);
4756 	generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
4757 
4758 	file_info->CreationTime = cpu_to_le64(fp->create_time);
4759 	time = ksmbd_UnixTimeToNT(stat.atime);
4760 	file_info->LastAccessTime = cpu_to_le64(time);
4761 	time = ksmbd_UnixTimeToNT(stat.mtime);
4762 	file_info->LastWriteTime = cpu_to_le64(time);
4763 	time = ksmbd_UnixTimeToNT(stat.ctime);
4764 	file_info->ChangeTime = cpu_to_le64(time);
4765 	file_info->Attributes = fp->f_ci->m_fattr;
4766 	file_info->AllocationSize =
4767 		cpu_to_le64(inode->i_blocks << 9);
4768 	file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4769 	file_info->Reserved = cpu_to_le32(0);
4770 	rsp->OutputBufferLength =
4771 		cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4772 	return 0;
4773 }
4774 
get_file_ea_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4775 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4776 {
4777 	struct smb2_file_ea_info *file_info;
4778 
4779 	file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4780 	file_info->EASize = 0;
4781 	rsp->OutputBufferLength =
4782 		cpu_to_le32(sizeof(struct smb2_file_ea_info));
4783 }
4784 
get_file_position_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4785 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4786 				   struct ksmbd_file *fp, void *rsp_org)
4787 {
4788 	struct smb2_file_pos_info *file_info;
4789 
4790 	file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4791 	file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4792 	rsp->OutputBufferLength =
4793 		cpu_to_le32(sizeof(struct smb2_file_pos_info));
4794 }
4795 
get_file_mode_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4796 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4797 			       struct ksmbd_file *fp, void *rsp_org)
4798 {
4799 	struct smb2_file_mode_info *file_info;
4800 
4801 	file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4802 	file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4803 	rsp->OutputBufferLength =
4804 		cpu_to_le32(sizeof(struct smb2_file_mode_info));
4805 }
4806 
get_file_compression_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4807 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4808 				      struct ksmbd_file *fp, void *rsp_org)
4809 {
4810 	struct smb2_file_comp_info *file_info;
4811 	struct kstat stat;
4812 
4813 	generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
4814 			 file_inode(fp->filp), &stat);
4815 
4816 	file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4817 	file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4818 	file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4819 	file_info->CompressionUnitShift = 0;
4820 	file_info->ChunkShift = 0;
4821 	file_info->ClusterShift = 0;
4822 	memset(&file_info->Reserved[0], 0, 3);
4823 
4824 	rsp->OutputBufferLength =
4825 		cpu_to_le32(sizeof(struct smb2_file_comp_info));
4826 }
4827 
get_file_attribute_tag_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4828 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4829 				       struct ksmbd_file *fp, void *rsp_org)
4830 {
4831 	struct smb2_file_attr_tag_info *file_info;
4832 
4833 	if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4834 		pr_err("no right to read the attributes : 0x%x\n",
4835 		       fp->daccess);
4836 		return -EACCES;
4837 	}
4838 
4839 	file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4840 	file_info->FileAttributes = fp->f_ci->m_fattr;
4841 	file_info->ReparseTag = 0;
4842 	rsp->OutputBufferLength =
4843 		cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4844 	return 0;
4845 }
4846 
find_file_posix_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4847 static void find_file_posix_info(struct smb2_query_info_rsp *rsp,
4848 				struct ksmbd_file *fp, void *rsp_org)
4849 {
4850 	struct smb311_posix_qinfo *file_info;
4851 	struct inode *inode = file_inode(fp->filp);
4852 	struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
4853 	vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
4854 	vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
4855 	u64 time;
4856 	int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4857 
4858 	file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4859 	file_info->CreationTime = cpu_to_le64(fp->create_time);
4860 	time = ksmbd_UnixTimeToNT(inode->i_atime);
4861 	file_info->LastAccessTime = cpu_to_le64(time);
4862 	time = ksmbd_UnixTimeToNT(inode->i_mtime);
4863 	file_info->LastWriteTime = cpu_to_le64(time);
4864 	time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
4865 	file_info->ChangeTime = cpu_to_le64(time);
4866 	file_info->DosAttributes = fp->f_ci->m_fattr;
4867 	file_info->Inode = cpu_to_le64(inode->i_ino);
4868 	file_info->EndOfFile = cpu_to_le64(inode->i_size);
4869 	file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4870 	file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4871 	file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4872 	file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4873 
4874 	/*
4875 	 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4876 	 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4877 	 *		  sub_auth(4 * 1(num_subauth)) + RID(4).
4878 	 */
4879 	id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4880 		  SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4881 	id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4882 		  SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4883 
4884 	rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4885 }
4886 
smb2_get_info_file(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)4887 static int smb2_get_info_file(struct ksmbd_work *work,
4888 			      struct smb2_query_info_req *req,
4889 			      struct smb2_query_info_rsp *rsp)
4890 {
4891 	struct ksmbd_file *fp;
4892 	int fileinfoclass = 0;
4893 	int rc = 0;
4894 	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4895 
4896 	if (test_share_config_flag(work->tcon->share_conf,
4897 				   KSMBD_SHARE_FLAG_PIPE)) {
4898 		/* smb2 info file called for pipe */
4899 		return smb2_get_info_file_pipe(work->sess, req, rsp,
4900 					       work->response_buf);
4901 	}
4902 
4903 	if (work->next_smb2_rcv_hdr_off) {
4904 		if (!has_file_id(req->VolatileFileId)) {
4905 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4906 				    work->compound_fid);
4907 			id = work->compound_fid;
4908 			pid = work->compound_pfid;
4909 		}
4910 	}
4911 
4912 	if (!has_file_id(id)) {
4913 		id = req->VolatileFileId;
4914 		pid = req->PersistentFileId;
4915 	}
4916 
4917 	fp = ksmbd_lookup_fd_slow(work, id, pid);
4918 	if (!fp)
4919 		return -ENOENT;
4920 
4921 	fileinfoclass = req->FileInfoClass;
4922 
4923 	switch (fileinfoclass) {
4924 	case FILE_ACCESS_INFORMATION:
4925 		get_file_access_info(rsp, fp, work->response_buf);
4926 		break;
4927 
4928 	case FILE_BASIC_INFORMATION:
4929 		rc = get_file_basic_info(rsp, fp, work->response_buf);
4930 		break;
4931 
4932 	case FILE_STANDARD_INFORMATION:
4933 		get_file_standard_info(rsp, fp, work->response_buf);
4934 		break;
4935 
4936 	case FILE_ALIGNMENT_INFORMATION:
4937 		get_file_alignment_info(rsp, work->response_buf);
4938 		break;
4939 
4940 	case FILE_ALL_INFORMATION:
4941 		rc = get_file_all_info(work, rsp, fp, work->response_buf);
4942 		break;
4943 
4944 	case FILE_ALTERNATE_NAME_INFORMATION:
4945 		get_file_alternate_info(work, rsp, fp, work->response_buf);
4946 		break;
4947 
4948 	case FILE_STREAM_INFORMATION:
4949 		get_file_stream_info(work, rsp, fp, work->response_buf);
4950 		break;
4951 
4952 	case FILE_INTERNAL_INFORMATION:
4953 		get_file_internal_info(rsp, fp, work->response_buf);
4954 		break;
4955 
4956 	case FILE_NETWORK_OPEN_INFORMATION:
4957 		rc = get_file_network_open_info(rsp, fp, work->response_buf);
4958 		break;
4959 
4960 	case FILE_EA_INFORMATION:
4961 		get_file_ea_info(rsp, work->response_buf);
4962 		break;
4963 
4964 	case FILE_FULL_EA_INFORMATION:
4965 		rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4966 		break;
4967 
4968 	case FILE_POSITION_INFORMATION:
4969 		get_file_position_info(rsp, fp, work->response_buf);
4970 		break;
4971 
4972 	case FILE_MODE_INFORMATION:
4973 		get_file_mode_info(rsp, fp, work->response_buf);
4974 		break;
4975 
4976 	case FILE_COMPRESSION_INFORMATION:
4977 		get_file_compression_info(rsp, fp, work->response_buf);
4978 		break;
4979 
4980 	case FILE_ATTRIBUTE_TAG_INFORMATION:
4981 		rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4982 		break;
4983 	case SMB_FIND_FILE_POSIX_INFO:
4984 		if (!work->tcon->posix_extensions) {
4985 			pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4986 			rc = -EOPNOTSUPP;
4987 		} else {
4988 			find_file_posix_info(rsp, fp, work->response_buf);
4989 		}
4990 		break;
4991 	default:
4992 		ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4993 			    fileinfoclass);
4994 		rc = -EOPNOTSUPP;
4995 	}
4996 	if (!rc)
4997 		rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4998 				      rsp, work->response_buf);
4999 	ksmbd_fd_put(work, fp);
5000 	return rc;
5001 }
5002 
smb2_get_info_filesystem(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5003 static int smb2_get_info_filesystem(struct ksmbd_work *work,
5004 				    struct smb2_query_info_req *req,
5005 				    struct smb2_query_info_rsp *rsp)
5006 {
5007 	struct ksmbd_session *sess = work->sess;
5008 	struct ksmbd_conn *conn = work->conn;
5009 	struct ksmbd_share_config *share = work->tcon->share_conf;
5010 	int fsinfoclass = 0;
5011 	struct kstatfs stfs;
5012 	struct path path;
5013 	int rc = 0, len;
5014 
5015 	if (!share->path)
5016 		return -EIO;
5017 
5018 	rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
5019 	if (rc) {
5020 		pr_err("cannot create vfs path\n");
5021 		return -EIO;
5022 	}
5023 
5024 	rc = vfs_statfs(&path, &stfs);
5025 	if (rc) {
5026 		pr_err("cannot do stat of path %s\n", share->path);
5027 		path_put(&path);
5028 		return -EIO;
5029 	}
5030 
5031 	fsinfoclass = req->FileInfoClass;
5032 
5033 	switch (fsinfoclass) {
5034 	case FS_DEVICE_INFORMATION:
5035 	{
5036 		struct filesystem_device_info *info;
5037 
5038 		info = (struct filesystem_device_info *)rsp->Buffer;
5039 
5040 		info->DeviceType = cpu_to_le32(stfs.f_type);
5041 		info->DeviceCharacteristics = cpu_to_le32(0x00000020);
5042 		rsp->OutputBufferLength = cpu_to_le32(8);
5043 		break;
5044 	}
5045 	case FS_ATTRIBUTE_INFORMATION:
5046 	{
5047 		struct filesystem_attribute_info *info;
5048 		size_t sz;
5049 
5050 		info = (struct filesystem_attribute_info *)rsp->Buffer;
5051 		info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
5052 					       FILE_PERSISTENT_ACLS |
5053 					       FILE_UNICODE_ON_DISK |
5054 					       FILE_CASE_PRESERVED_NAMES |
5055 					       FILE_CASE_SENSITIVE_SEARCH |
5056 					       FILE_SUPPORTS_BLOCK_REFCOUNTING);
5057 
5058 		info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
5059 
5060 		if (test_share_config_flag(work->tcon->share_conf,
5061 		    KSMBD_SHARE_FLAG_STREAMS))
5062 			info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
5063 
5064 		info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
5065 		len = smbConvertToUTF16((__le16 *)info->FileSystemName,
5066 					"NTFS", PATH_MAX, conn->local_nls, 0);
5067 		len = len * 2;
5068 		info->FileSystemNameLen = cpu_to_le32(len);
5069 		sz = sizeof(struct filesystem_attribute_info) - 2 + len;
5070 		rsp->OutputBufferLength = cpu_to_le32(sz);
5071 		break;
5072 	}
5073 	case FS_VOLUME_INFORMATION:
5074 	{
5075 		struct filesystem_vol_info *info;
5076 		size_t sz;
5077 		unsigned int serial_crc = 0;
5078 
5079 		info = (struct filesystem_vol_info *)(rsp->Buffer);
5080 		info->VolumeCreationTime = 0;
5081 		serial_crc = crc32_le(serial_crc, share->name,
5082 				      strlen(share->name));
5083 		serial_crc = crc32_le(serial_crc, share->path,
5084 				      strlen(share->path));
5085 		serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
5086 				      strlen(ksmbd_netbios_name()));
5087 		/* Taking dummy value of serial number*/
5088 		info->SerialNumber = cpu_to_le32(serial_crc);
5089 		len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
5090 					share->name, PATH_MAX,
5091 					conn->local_nls, 0);
5092 		len = len * 2;
5093 		info->VolumeLabelSize = cpu_to_le32(len);
5094 		info->Reserved = 0;
5095 		sz = sizeof(struct filesystem_vol_info) - 2 + len;
5096 		rsp->OutputBufferLength = cpu_to_le32(sz);
5097 		break;
5098 	}
5099 	case FS_SIZE_INFORMATION:
5100 	{
5101 		struct filesystem_info *info;
5102 
5103 		info = (struct filesystem_info *)(rsp->Buffer);
5104 		info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5105 		info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5106 		info->SectorsPerAllocationUnit = cpu_to_le32(1);
5107 		info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5108 		rsp->OutputBufferLength = cpu_to_le32(24);
5109 		break;
5110 	}
5111 	case FS_FULL_SIZE_INFORMATION:
5112 	{
5113 		struct smb2_fs_full_size_info *info;
5114 
5115 		info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5116 		info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5117 		info->CallerAvailableAllocationUnits =
5118 					cpu_to_le64(stfs.f_bavail);
5119 		info->ActualAvailableAllocationUnits =
5120 					cpu_to_le64(stfs.f_bfree);
5121 		info->SectorsPerAllocationUnit = cpu_to_le32(1);
5122 		info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5123 		rsp->OutputBufferLength = cpu_to_le32(32);
5124 		break;
5125 	}
5126 	case FS_OBJECT_ID_INFORMATION:
5127 	{
5128 		struct object_id_info *info;
5129 
5130 		info = (struct object_id_info *)(rsp->Buffer);
5131 
5132 		if (!user_guest(sess->user))
5133 			memcpy(info->objid, user_passkey(sess->user), 16);
5134 		else
5135 			memset(info->objid, 0, 16);
5136 
5137 		info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5138 		info->extended_info.version = cpu_to_le32(1);
5139 		info->extended_info.release = cpu_to_le32(1);
5140 		info->extended_info.rel_date = 0;
5141 		memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5142 		rsp->OutputBufferLength = cpu_to_le32(64);
5143 		break;
5144 	}
5145 	case FS_SECTOR_SIZE_INFORMATION:
5146 	{
5147 		struct smb3_fs_ss_info *info;
5148 		unsigned int sector_size =
5149 			min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5150 
5151 		info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5152 
5153 		info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5154 		info->PhysicalBytesPerSectorForAtomicity =
5155 				cpu_to_le32(sector_size);
5156 		info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5157 		info->FSEffPhysicalBytesPerSectorForAtomicity =
5158 				cpu_to_le32(sector_size);
5159 		info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5160 				    SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5161 		info->ByteOffsetForSectorAlignment = 0;
5162 		info->ByteOffsetForPartitionAlignment = 0;
5163 		rsp->OutputBufferLength = cpu_to_le32(28);
5164 		break;
5165 	}
5166 	case FS_CONTROL_INFORMATION:
5167 	{
5168 		/*
5169 		 * TODO : The current implementation is based on
5170 		 * test result with win7(NTFS) server. It's need to
5171 		 * modify this to get valid Quota values
5172 		 * from Linux kernel
5173 		 */
5174 		struct smb2_fs_control_info *info;
5175 
5176 		info = (struct smb2_fs_control_info *)(rsp->Buffer);
5177 		info->FreeSpaceStartFiltering = 0;
5178 		info->FreeSpaceThreshold = 0;
5179 		info->FreeSpaceStopFiltering = 0;
5180 		info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5181 		info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5182 		info->Padding = 0;
5183 		rsp->OutputBufferLength = cpu_to_le32(48);
5184 		break;
5185 	}
5186 	case FS_POSIX_INFORMATION:
5187 	{
5188 		struct filesystem_posix_info *info;
5189 
5190 		if (!work->tcon->posix_extensions) {
5191 			pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5192 			rc = -EOPNOTSUPP;
5193 		} else {
5194 			info = (struct filesystem_posix_info *)(rsp->Buffer);
5195 			info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5196 			info->BlockSize = cpu_to_le32(stfs.f_bsize);
5197 			info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5198 			info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5199 			info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5200 			info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5201 			info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5202 			rsp->OutputBufferLength = cpu_to_le32(56);
5203 		}
5204 		break;
5205 	}
5206 	default:
5207 		path_put(&path);
5208 		return -EOPNOTSUPP;
5209 	}
5210 	rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5211 			      rsp, work->response_buf);
5212 	path_put(&path);
5213 	return rc;
5214 }
5215 
smb2_get_info_sec(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5216 static int smb2_get_info_sec(struct ksmbd_work *work,
5217 			     struct smb2_query_info_req *req,
5218 			     struct smb2_query_info_rsp *rsp)
5219 {
5220 	struct ksmbd_file *fp;
5221 	struct mnt_idmap *idmap;
5222 	struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5223 	struct smb_fattr fattr = {{0}};
5224 	struct inode *inode;
5225 	__u32 secdesclen = 0;
5226 	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5227 	int addition_info = le32_to_cpu(req->AdditionalInformation);
5228 	int rc = 0, ppntsd_size = 0;
5229 
5230 	if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5231 			      PROTECTED_DACL_SECINFO |
5232 			      UNPROTECTED_DACL_SECINFO)) {
5233 		ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5234 		       addition_info);
5235 
5236 		pntsd->revision = cpu_to_le16(1);
5237 		pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5238 		pntsd->osidoffset = 0;
5239 		pntsd->gsidoffset = 0;
5240 		pntsd->sacloffset = 0;
5241 		pntsd->dacloffset = 0;
5242 
5243 		secdesclen = sizeof(struct smb_ntsd);
5244 		rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5245 
5246 		return 0;
5247 	}
5248 
5249 	if (work->next_smb2_rcv_hdr_off) {
5250 		if (!has_file_id(req->VolatileFileId)) {
5251 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5252 				    work->compound_fid);
5253 			id = work->compound_fid;
5254 			pid = work->compound_pfid;
5255 		}
5256 	}
5257 
5258 	if (!has_file_id(id)) {
5259 		id = req->VolatileFileId;
5260 		pid = req->PersistentFileId;
5261 	}
5262 
5263 	fp = ksmbd_lookup_fd_slow(work, id, pid);
5264 	if (!fp)
5265 		return -ENOENT;
5266 
5267 	idmap = file_mnt_idmap(fp->filp);
5268 	inode = file_inode(fp->filp);
5269 	ksmbd_acls_fattr(&fattr, idmap, inode);
5270 
5271 	if (test_share_config_flag(work->tcon->share_conf,
5272 				   KSMBD_SHARE_FLAG_ACL_XATTR))
5273 		ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
5274 						     fp->filp->f_path.dentry,
5275 						     &ppntsd);
5276 
5277 	/* Check if sd buffer size exceeds response buffer size */
5278 	if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5279 		rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
5280 				    addition_info, &secdesclen, &fattr);
5281 	posix_acl_release(fattr.cf_acls);
5282 	posix_acl_release(fattr.cf_dacls);
5283 	kfree(ppntsd);
5284 	ksmbd_fd_put(work, fp);
5285 	if (rc)
5286 		return rc;
5287 
5288 	rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5289 	return 0;
5290 }
5291 
5292 /**
5293  * smb2_query_info() - handler for smb2 query info command
5294  * @work:	smb work containing query info request buffer
5295  *
5296  * Return:	0 on success, otherwise error
5297  */
smb2_query_info(struct ksmbd_work * work)5298 int smb2_query_info(struct ksmbd_work *work)
5299 {
5300 	struct smb2_query_info_req *req;
5301 	struct smb2_query_info_rsp *rsp;
5302 	int rc = 0;
5303 
5304 	WORK_BUFFERS(work, req, rsp);
5305 
5306 	ksmbd_debug(SMB, "GOT query info request\n");
5307 
5308 	switch (req->InfoType) {
5309 	case SMB2_O_INFO_FILE:
5310 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5311 		rc = smb2_get_info_file(work, req, rsp);
5312 		break;
5313 	case SMB2_O_INFO_FILESYSTEM:
5314 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5315 		rc = smb2_get_info_filesystem(work, req, rsp);
5316 		break;
5317 	case SMB2_O_INFO_SECURITY:
5318 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5319 		rc = smb2_get_info_sec(work, req, rsp);
5320 		break;
5321 	default:
5322 		ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5323 			    req->InfoType);
5324 		rc = -EOPNOTSUPP;
5325 	}
5326 
5327 	if (!rc) {
5328 		rsp->StructureSize = cpu_to_le16(9);
5329 		rsp->OutputBufferOffset = cpu_to_le16(72);
5330 		rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
5331 				       offsetof(struct smb2_query_info_rsp, Buffer) +
5332 					le32_to_cpu(rsp->OutputBufferLength));
5333 	}
5334 
5335 	if (rc < 0) {
5336 		if (rc == -EACCES)
5337 			rsp->hdr.Status = STATUS_ACCESS_DENIED;
5338 		else if (rc == -ENOENT)
5339 			rsp->hdr.Status = STATUS_FILE_CLOSED;
5340 		else if (rc == -EIO)
5341 			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5342 		else if (rc == -ENOMEM)
5343 			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
5344 		else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5345 			rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5346 		smb2_set_err_rsp(work);
5347 
5348 		ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5349 			    rc);
5350 		return rc;
5351 	}
5352 	return 0;
5353 }
5354 
5355 /**
5356  * smb2_close_pipe() - handler for closing IPC pipe
5357  * @work:	smb work containing close request buffer
5358  *
5359  * Return:	0
5360  */
smb2_close_pipe(struct ksmbd_work * work)5361 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5362 {
5363 	u64 id;
5364 	struct smb2_close_req *req;
5365 	struct smb2_close_rsp *rsp;
5366 
5367 	WORK_BUFFERS(work, req, rsp);
5368 
5369 	id = req->VolatileFileId;
5370 	ksmbd_session_rpc_close(work->sess, id);
5371 
5372 	rsp->StructureSize = cpu_to_le16(60);
5373 	rsp->Flags = 0;
5374 	rsp->Reserved = 0;
5375 	rsp->CreationTime = 0;
5376 	rsp->LastAccessTime = 0;
5377 	rsp->LastWriteTime = 0;
5378 	rsp->ChangeTime = 0;
5379 	rsp->AllocationSize = 0;
5380 	rsp->EndOfFile = 0;
5381 	rsp->Attributes = 0;
5382 
5383 	return ksmbd_iov_pin_rsp(work, (void *)rsp,
5384 				 sizeof(struct smb2_close_rsp));
5385 }
5386 
5387 /**
5388  * smb2_close() - handler for smb2 close file command
5389  * @work:	smb work containing close request buffer
5390  *
5391  * Return:	0
5392  */
smb2_close(struct ksmbd_work * work)5393 int smb2_close(struct ksmbd_work *work)
5394 {
5395 	u64 volatile_id = KSMBD_NO_FID;
5396 	u64 sess_id;
5397 	struct smb2_close_req *req;
5398 	struct smb2_close_rsp *rsp;
5399 	struct ksmbd_conn *conn = work->conn;
5400 	struct ksmbd_file *fp;
5401 	struct inode *inode;
5402 	u64 time;
5403 	int err = 0;
5404 
5405 	WORK_BUFFERS(work, req, rsp);
5406 
5407 	if (test_share_config_flag(work->tcon->share_conf,
5408 				   KSMBD_SHARE_FLAG_PIPE)) {
5409 		ksmbd_debug(SMB, "IPC pipe close request\n");
5410 		return smb2_close_pipe(work);
5411 	}
5412 
5413 	sess_id = le64_to_cpu(req->hdr.SessionId);
5414 	if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5415 		sess_id = work->compound_sid;
5416 
5417 	work->compound_sid = 0;
5418 	if (check_session_id(conn, sess_id)) {
5419 		work->compound_sid = sess_id;
5420 	} else {
5421 		rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5422 		if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5423 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5424 		err = -EBADF;
5425 		goto out;
5426 	}
5427 
5428 	if (work->next_smb2_rcv_hdr_off &&
5429 	    !has_file_id(req->VolatileFileId)) {
5430 		if (!has_file_id(work->compound_fid)) {
5431 			/* file already closed, return FILE_CLOSED */
5432 			ksmbd_debug(SMB, "file already closed\n");
5433 			rsp->hdr.Status = STATUS_FILE_CLOSED;
5434 			err = -EBADF;
5435 			goto out;
5436 		} else {
5437 			ksmbd_debug(SMB,
5438 				    "Compound request set FID = %llu:%llu\n",
5439 				    work->compound_fid,
5440 				    work->compound_pfid);
5441 			volatile_id = work->compound_fid;
5442 
5443 			/* file closed, stored id is not valid anymore */
5444 			work->compound_fid = KSMBD_NO_FID;
5445 			work->compound_pfid = KSMBD_NO_FID;
5446 		}
5447 	} else {
5448 		volatile_id = req->VolatileFileId;
5449 	}
5450 	ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5451 
5452 	rsp->StructureSize = cpu_to_le16(60);
5453 	rsp->Reserved = 0;
5454 
5455 	if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5456 		fp = ksmbd_lookup_fd_fast(work, volatile_id);
5457 		if (!fp) {
5458 			err = -ENOENT;
5459 			goto out;
5460 		}
5461 
5462 		inode = file_inode(fp->filp);
5463 		rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5464 		rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5465 			cpu_to_le64(inode->i_blocks << 9);
5466 		rsp->EndOfFile = cpu_to_le64(inode->i_size);
5467 		rsp->Attributes = fp->f_ci->m_fattr;
5468 		rsp->CreationTime = cpu_to_le64(fp->create_time);
5469 		time = ksmbd_UnixTimeToNT(inode->i_atime);
5470 		rsp->LastAccessTime = cpu_to_le64(time);
5471 		time = ksmbd_UnixTimeToNT(inode->i_mtime);
5472 		rsp->LastWriteTime = cpu_to_le64(time);
5473 		time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
5474 		rsp->ChangeTime = cpu_to_le64(time);
5475 		ksmbd_fd_put(work, fp);
5476 	} else {
5477 		rsp->Flags = 0;
5478 		rsp->AllocationSize = 0;
5479 		rsp->EndOfFile = 0;
5480 		rsp->Attributes = 0;
5481 		rsp->CreationTime = 0;
5482 		rsp->LastAccessTime = 0;
5483 		rsp->LastWriteTime = 0;
5484 		rsp->ChangeTime = 0;
5485 	}
5486 
5487 	err = ksmbd_close_fd(work, volatile_id);
5488 out:
5489 	if (!err)
5490 		err = ksmbd_iov_pin_rsp(work, (void *)rsp,
5491 					sizeof(struct smb2_close_rsp));
5492 
5493 	if (err) {
5494 		if (rsp->hdr.Status == 0)
5495 			rsp->hdr.Status = STATUS_FILE_CLOSED;
5496 		smb2_set_err_rsp(work);
5497 	}
5498 
5499 	return err;
5500 }
5501 
5502 /**
5503  * smb2_echo() - handler for smb2 echo(ping) command
5504  * @work:	smb work containing echo request buffer
5505  *
5506  * Return:	0
5507  */
smb2_echo(struct ksmbd_work * work)5508 int smb2_echo(struct ksmbd_work *work)
5509 {
5510 	struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5511 
5512 	if (work->next_smb2_rcv_hdr_off)
5513 		rsp = ksmbd_resp_buf_next(work);
5514 
5515 	rsp->StructureSize = cpu_to_le16(4);
5516 	rsp->Reserved = 0;
5517 	return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
5518 }
5519 
smb2_rename(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * file_info,struct nls_table * local_nls)5520 static int smb2_rename(struct ksmbd_work *work,
5521 		       struct ksmbd_file *fp,
5522 		       struct smb2_file_rename_info *file_info,
5523 		       struct nls_table *local_nls)
5524 {
5525 	struct ksmbd_share_config *share = fp->tcon->share_conf;
5526 	char *new_name = NULL;
5527 	int rc, flags = 0;
5528 
5529 	ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5530 	new_name = smb2_get_name(file_info->FileName,
5531 				 le32_to_cpu(file_info->FileNameLength),
5532 				 local_nls);
5533 	if (IS_ERR(new_name))
5534 		return PTR_ERR(new_name);
5535 
5536 	if (strchr(new_name, ':')) {
5537 		int s_type;
5538 		char *xattr_stream_name, *stream_name = NULL;
5539 		size_t xattr_stream_size;
5540 		int len;
5541 
5542 		rc = parse_stream_name(new_name, &stream_name, &s_type);
5543 		if (rc < 0)
5544 			goto out;
5545 
5546 		len = strlen(new_name);
5547 		if (len > 0 && new_name[len - 1] != '/') {
5548 			pr_err("not allow base filename in rename\n");
5549 			rc = -ESHARE;
5550 			goto out;
5551 		}
5552 
5553 		rc = ksmbd_vfs_xattr_stream_name(stream_name,
5554 						 &xattr_stream_name,
5555 						 &xattr_stream_size,
5556 						 s_type);
5557 		if (rc)
5558 			goto out;
5559 
5560 		rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
5561 					&fp->filp->f_path,
5562 					xattr_stream_name,
5563 					NULL, 0, 0, true);
5564 		if (rc < 0) {
5565 			pr_err("failed to store stream name in xattr: %d\n",
5566 			       rc);
5567 			rc = -EINVAL;
5568 			goto out;
5569 		}
5570 
5571 		goto out;
5572 	}
5573 
5574 	ksmbd_debug(SMB, "new name %s\n", new_name);
5575 	if (ksmbd_share_veto_filename(share, new_name)) {
5576 		rc = -ENOENT;
5577 		ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5578 		goto out;
5579 	}
5580 
5581 	if (!file_info->ReplaceIfExists)
5582 		flags = RENAME_NOREPLACE;
5583 
5584 	smb_break_all_levII_oplock(work, fp, 0);
5585 	rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
5586 out:
5587 	kfree(new_name);
5588 	return rc;
5589 }
5590 
smb2_create_link(struct ksmbd_work * work,struct ksmbd_share_config * share,struct smb2_file_link_info * file_info,unsigned int buf_len,struct file * filp,struct nls_table * local_nls)5591 static int smb2_create_link(struct ksmbd_work *work,
5592 			    struct ksmbd_share_config *share,
5593 			    struct smb2_file_link_info *file_info,
5594 			    unsigned int buf_len, struct file *filp,
5595 			    struct nls_table *local_nls)
5596 {
5597 	char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5598 	struct path path, parent_path;
5599 	bool file_present = false;
5600 	int rc;
5601 
5602 	if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5603 			le32_to_cpu(file_info->FileNameLength))
5604 		return -EINVAL;
5605 
5606 	ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5607 	pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5608 	if (!pathname)
5609 		return -ENOMEM;
5610 
5611 	link_name = smb2_get_name(file_info->FileName,
5612 				  le32_to_cpu(file_info->FileNameLength),
5613 				  local_nls);
5614 	if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5615 		rc = -EINVAL;
5616 		goto out;
5617 	}
5618 
5619 	ksmbd_debug(SMB, "link name is %s\n", link_name);
5620 	target_name = file_path(filp, pathname, PATH_MAX);
5621 	if (IS_ERR(target_name)) {
5622 		rc = -EINVAL;
5623 		goto out;
5624 	}
5625 
5626 	ksmbd_debug(SMB, "target name is %s\n", target_name);
5627 	rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
5628 					&parent_path, &path, 0);
5629 	if (rc) {
5630 		if (rc != -ENOENT)
5631 			goto out;
5632 	} else
5633 		file_present = true;
5634 
5635 	if (file_info->ReplaceIfExists) {
5636 		if (file_present) {
5637 			rc = ksmbd_vfs_remove_file(work, &path);
5638 			if (rc) {
5639 				rc = -EINVAL;
5640 				ksmbd_debug(SMB, "cannot delete %s\n",
5641 					    link_name);
5642 				goto out;
5643 			}
5644 		}
5645 	} else {
5646 		if (file_present) {
5647 			rc = -EEXIST;
5648 			ksmbd_debug(SMB, "link already exists\n");
5649 			goto out;
5650 		}
5651 	}
5652 
5653 	rc = ksmbd_vfs_link(work, target_name, link_name);
5654 	if (rc)
5655 		rc = -EINVAL;
5656 out:
5657 	if (file_present)
5658 		ksmbd_vfs_kern_path_unlock(&parent_path, &path);
5659 
5660 	if (!IS_ERR(link_name))
5661 		kfree(link_name);
5662 	kfree(pathname);
5663 	return rc;
5664 }
5665 
set_file_basic_info(struct ksmbd_file * fp,struct smb2_file_basic_info * file_info,struct ksmbd_share_config * share)5666 static int set_file_basic_info(struct ksmbd_file *fp,
5667 			       struct smb2_file_basic_info *file_info,
5668 			       struct ksmbd_share_config *share)
5669 {
5670 	struct iattr attrs;
5671 	struct file *filp;
5672 	struct inode *inode;
5673 	struct mnt_idmap *idmap;
5674 	int rc = 0;
5675 
5676 	if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5677 		return -EACCES;
5678 
5679 	attrs.ia_valid = 0;
5680 	filp = fp->filp;
5681 	inode = file_inode(filp);
5682 	idmap = file_mnt_idmap(filp);
5683 
5684 	if (file_info->CreationTime)
5685 		fp->create_time = le64_to_cpu(file_info->CreationTime);
5686 
5687 	if (file_info->LastAccessTime) {
5688 		attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5689 		attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5690 	}
5691 
5692 	attrs.ia_valid |= ATTR_CTIME;
5693 	if (file_info->ChangeTime)
5694 		attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5695 	else
5696 		attrs.ia_ctime = inode_get_ctime(inode);
5697 
5698 	if (file_info->LastWriteTime) {
5699 		attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5700 		attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5701 	}
5702 
5703 	if (file_info->Attributes) {
5704 		if (!S_ISDIR(inode->i_mode) &&
5705 		    file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5706 			pr_err("can't change a file to a directory\n");
5707 			return -EINVAL;
5708 		}
5709 
5710 		if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5711 			fp->f_ci->m_fattr = file_info->Attributes |
5712 				(fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5713 	}
5714 
5715 	if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5716 	    (file_info->CreationTime || file_info->Attributes)) {
5717 		struct xattr_dos_attrib da = {0};
5718 
5719 		da.version = 4;
5720 		da.itime = fp->itime;
5721 		da.create_time = fp->create_time;
5722 		da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5723 		da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5724 			XATTR_DOSINFO_ITIME;
5725 
5726 		rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
5727 				true);
5728 		if (rc)
5729 			ksmbd_debug(SMB,
5730 				    "failed to restore file attribute in EA\n");
5731 		rc = 0;
5732 	}
5733 
5734 	if (attrs.ia_valid) {
5735 		struct dentry *dentry = filp->f_path.dentry;
5736 		struct inode *inode = d_inode(dentry);
5737 
5738 		if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5739 			return -EACCES;
5740 
5741 		inode_lock(inode);
5742 		inode_set_ctime_to_ts(inode, attrs.ia_ctime);
5743 		attrs.ia_valid &= ~ATTR_CTIME;
5744 		rc = notify_change(idmap, dentry, &attrs, NULL);
5745 		inode_unlock(inode);
5746 	}
5747 	return rc;
5748 }
5749 
set_file_allocation_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_alloc_info * file_alloc_info)5750 static int set_file_allocation_info(struct ksmbd_work *work,
5751 				    struct ksmbd_file *fp,
5752 				    struct smb2_file_alloc_info *file_alloc_info)
5753 {
5754 	/*
5755 	 * TODO : It's working fine only when store dos attributes
5756 	 * is not yes. need to implement a logic which works
5757 	 * properly with any smb.conf option
5758 	 */
5759 
5760 	loff_t alloc_blks;
5761 	struct inode *inode;
5762 	int rc;
5763 
5764 	if (!(fp->daccess & FILE_WRITE_DATA_LE))
5765 		return -EACCES;
5766 
5767 	alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5768 	inode = file_inode(fp->filp);
5769 
5770 	if (alloc_blks > inode->i_blocks) {
5771 		smb_break_all_levII_oplock(work, fp, 1);
5772 		rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5773 				   alloc_blks * 512);
5774 		if (rc && rc != -EOPNOTSUPP) {
5775 			pr_err("vfs_fallocate is failed : %d\n", rc);
5776 			return rc;
5777 		}
5778 	} else if (alloc_blks < inode->i_blocks) {
5779 		loff_t size;
5780 
5781 		/*
5782 		 * Allocation size could be smaller than original one
5783 		 * which means allocated blocks in file should be
5784 		 * deallocated. use truncate to cut out it, but inode
5785 		 * size is also updated with truncate offset.
5786 		 * inode size is retained by backup inode size.
5787 		 */
5788 		size = i_size_read(inode);
5789 		rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5790 		if (rc) {
5791 			pr_err("truncate failed!, err %d\n", rc);
5792 			return rc;
5793 		}
5794 		if (size < alloc_blks * 512)
5795 			i_size_write(inode, size);
5796 	}
5797 	return 0;
5798 }
5799 
set_end_of_file_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_eof_info * file_eof_info)5800 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5801 				struct smb2_file_eof_info *file_eof_info)
5802 {
5803 	loff_t newsize;
5804 	struct inode *inode;
5805 	int rc;
5806 
5807 	if (!(fp->daccess & FILE_WRITE_DATA_LE))
5808 		return -EACCES;
5809 
5810 	newsize = le64_to_cpu(file_eof_info->EndOfFile);
5811 	inode = file_inode(fp->filp);
5812 
5813 	/*
5814 	 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5815 	 * on FAT32 shared device, truncate execution time is too long
5816 	 * and network error could cause from windows client. because
5817 	 * truncate of some filesystem like FAT32 fill zero data in
5818 	 * truncated range.
5819 	 */
5820 	if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5821 		ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5822 		rc = ksmbd_vfs_truncate(work, fp, newsize);
5823 		if (rc) {
5824 			ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5825 			if (rc != -EAGAIN)
5826 				rc = -EBADF;
5827 			return rc;
5828 		}
5829 	}
5830 	return 0;
5831 }
5832 
set_rename_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * rename_info,unsigned int buf_len)5833 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5834 			   struct smb2_file_rename_info *rename_info,
5835 			   unsigned int buf_len)
5836 {
5837 	if (!(fp->daccess & FILE_DELETE_LE)) {
5838 		pr_err("no right to delete : 0x%x\n", fp->daccess);
5839 		return -EACCES;
5840 	}
5841 
5842 	if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5843 			le32_to_cpu(rename_info->FileNameLength))
5844 		return -EINVAL;
5845 
5846 	if (!le32_to_cpu(rename_info->FileNameLength))
5847 		return -EINVAL;
5848 
5849 	return smb2_rename(work, fp, rename_info, work->conn->local_nls);
5850 }
5851 
set_file_disposition_info(struct ksmbd_file * fp,struct smb2_file_disposition_info * file_info)5852 static int set_file_disposition_info(struct ksmbd_file *fp,
5853 				     struct smb2_file_disposition_info *file_info)
5854 {
5855 	struct inode *inode;
5856 
5857 	if (!(fp->daccess & FILE_DELETE_LE)) {
5858 		pr_err("no right to delete : 0x%x\n", fp->daccess);
5859 		return -EACCES;
5860 	}
5861 
5862 	inode = file_inode(fp->filp);
5863 	if (file_info->DeletePending) {
5864 		if (S_ISDIR(inode->i_mode) &&
5865 		    ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5866 			return -EBUSY;
5867 		ksmbd_set_inode_pending_delete(fp);
5868 	} else {
5869 		ksmbd_clear_inode_pending_delete(fp);
5870 	}
5871 	return 0;
5872 }
5873 
set_file_position_info(struct ksmbd_file * fp,struct smb2_file_pos_info * file_info)5874 static int set_file_position_info(struct ksmbd_file *fp,
5875 				  struct smb2_file_pos_info *file_info)
5876 {
5877 	loff_t current_byte_offset;
5878 	unsigned long sector_size;
5879 	struct inode *inode;
5880 
5881 	inode = file_inode(fp->filp);
5882 	current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5883 	sector_size = inode->i_sb->s_blocksize;
5884 
5885 	if (current_byte_offset < 0 ||
5886 	    (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5887 	     current_byte_offset & (sector_size - 1))) {
5888 		pr_err("CurrentByteOffset is not valid : %llu\n",
5889 		       current_byte_offset);
5890 		return -EINVAL;
5891 	}
5892 
5893 	fp->filp->f_pos = current_byte_offset;
5894 	return 0;
5895 }
5896 
set_file_mode_info(struct ksmbd_file * fp,struct smb2_file_mode_info * file_info)5897 static int set_file_mode_info(struct ksmbd_file *fp,
5898 			      struct smb2_file_mode_info *file_info)
5899 {
5900 	__le32 mode;
5901 
5902 	mode = file_info->Mode;
5903 
5904 	if ((mode & ~FILE_MODE_INFO_MASK)) {
5905 		pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5906 		return -EINVAL;
5907 	}
5908 
5909 	/*
5910 	 * TODO : need to implement consideration for
5911 	 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5912 	 */
5913 	ksmbd_vfs_set_fadvise(fp->filp, mode);
5914 	fp->coption = mode;
5915 	return 0;
5916 }
5917 
5918 /**
5919  * smb2_set_info_file() - handler for smb2 set info command
5920  * @work:	smb work containing set info command buffer
5921  * @fp:		ksmbd_file pointer
5922  * @req:	request buffer pointer
5923  * @share:	ksmbd_share_config pointer
5924  *
5925  * Return:	0 on success, otherwise error
5926  * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5927  */
smb2_set_info_file(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_set_info_req * req,struct ksmbd_share_config * share)5928 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5929 			      struct smb2_set_info_req *req,
5930 			      struct ksmbd_share_config *share)
5931 {
5932 	unsigned int buf_len = le32_to_cpu(req->BufferLength);
5933 
5934 	switch (req->FileInfoClass) {
5935 	case FILE_BASIC_INFORMATION:
5936 	{
5937 		if (buf_len < sizeof(struct smb2_file_basic_info))
5938 			return -EINVAL;
5939 
5940 		return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5941 	}
5942 	case FILE_ALLOCATION_INFORMATION:
5943 	{
5944 		if (buf_len < sizeof(struct smb2_file_alloc_info))
5945 			return -EINVAL;
5946 
5947 		return set_file_allocation_info(work, fp,
5948 						(struct smb2_file_alloc_info *)req->Buffer);
5949 	}
5950 	case FILE_END_OF_FILE_INFORMATION:
5951 	{
5952 		if (buf_len < sizeof(struct smb2_file_eof_info))
5953 			return -EINVAL;
5954 
5955 		return set_end_of_file_info(work, fp,
5956 					    (struct smb2_file_eof_info *)req->Buffer);
5957 	}
5958 	case FILE_RENAME_INFORMATION:
5959 	{
5960 		if (buf_len < sizeof(struct smb2_file_rename_info))
5961 			return -EINVAL;
5962 
5963 		return set_rename_info(work, fp,
5964 				       (struct smb2_file_rename_info *)req->Buffer,
5965 				       buf_len);
5966 	}
5967 	case FILE_LINK_INFORMATION:
5968 	{
5969 		if (buf_len < sizeof(struct smb2_file_link_info))
5970 			return -EINVAL;
5971 
5972 		return smb2_create_link(work, work->tcon->share_conf,
5973 					(struct smb2_file_link_info *)req->Buffer,
5974 					buf_len, fp->filp,
5975 					work->conn->local_nls);
5976 	}
5977 	case FILE_DISPOSITION_INFORMATION:
5978 	{
5979 		if (buf_len < sizeof(struct smb2_file_disposition_info))
5980 			return -EINVAL;
5981 
5982 		return set_file_disposition_info(fp,
5983 						 (struct smb2_file_disposition_info *)req->Buffer);
5984 	}
5985 	case FILE_FULL_EA_INFORMATION:
5986 	{
5987 		if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5988 			pr_err("Not permitted to write ext  attr: 0x%x\n",
5989 			       fp->daccess);
5990 			return -EACCES;
5991 		}
5992 
5993 		if (buf_len < sizeof(struct smb2_ea_info))
5994 			return -EINVAL;
5995 
5996 		return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5997 				   buf_len, &fp->filp->f_path, true);
5998 	}
5999 	case FILE_POSITION_INFORMATION:
6000 	{
6001 		if (buf_len < sizeof(struct smb2_file_pos_info))
6002 			return -EINVAL;
6003 
6004 		return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
6005 	}
6006 	case FILE_MODE_INFORMATION:
6007 	{
6008 		if (buf_len < sizeof(struct smb2_file_mode_info))
6009 			return -EINVAL;
6010 
6011 		return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
6012 	}
6013 	}
6014 
6015 	pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6016 	return -EOPNOTSUPP;
6017 }
6018 
smb2_set_info_sec(struct ksmbd_file * fp,int addition_info,char * buffer,int buf_len)6019 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6020 			     char *buffer, int buf_len)
6021 {
6022 	struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6023 
6024 	fp->saccess |= FILE_SHARE_DELETE_LE;
6025 
6026 	return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6027 			buf_len, false, true);
6028 }
6029 
6030 /**
6031  * smb2_set_info() - handler for smb2 set info command handler
6032  * @work:	smb work containing set info request buffer
6033  *
6034  * Return:	0 on success, otherwise error
6035  */
smb2_set_info(struct ksmbd_work * work)6036 int smb2_set_info(struct ksmbd_work *work)
6037 {
6038 	struct smb2_set_info_req *req;
6039 	struct smb2_set_info_rsp *rsp;
6040 	struct ksmbd_file *fp = NULL;
6041 	int rc = 0;
6042 	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6043 
6044 	ksmbd_debug(SMB, "Received set info request\n");
6045 
6046 	if (work->next_smb2_rcv_hdr_off) {
6047 		req = ksmbd_req_buf_next(work);
6048 		rsp = ksmbd_resp_buf_next(work);
6049 		if (!has_file_id(req->VolatileFileId)) {
6050 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6051 				    work->compound_fid);
6052 			id = work->compound_fid;
6053 			pid = work->compound_pfid;
6054 		}
6055 	} else {
6056 		req = smb2_get_msg(work->request_buf);
6057 		rsp = smb2_get_msg(work->response_buf);
6058 	}
6059 
6060 	if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6061 		ksmbd_debug(SMB, "User does not have write permission\n");
6062 		pr_err("User does not have write permission\n");
6063 		rc = -EACCES;
6064 		goto err_out;
6065 	}
6066 
6067 	if (!has_file_id(id)) {
6068 		id = req->VolatileFileId;
6069 		pid = req->PersistentFileId;
6070 	}
6071 
6072 	fp = ksmbd_lookup_fd_slow(work, id, pid);
6073 	if (!fp) {
6074 		ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6075 		rc = -ENOENT;
6076 		goto err_out;
6077 	}
6078 
6079 	switch (req->InfoType) {
6080 	case SMB2_O_INFO_FILE:
6081 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6082 		rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6083 		break;
6084 	case SMB2_O_INFO_SECURITY:
6085 		ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6086 		if (ksmbd_override_fsids(work)) {
6087 			rc = -ENOMEM;
6088 			goto err_out;
6089 		}
6090 		rc = smb2_set_info_sec(fp,
6091 				       le32_to_cpu(req->AdditionalInformation),
6092 				       req->Buffer,
6093 				       le32_to_cpu(req->BufferLength));
6094 		ksmbd_revert_fsids(work);
6095 		break;
6096 	default:
6097 		rc = -EOPNOTSUPP;
6098 	}
6099 
6100 	if (rc < 0)
6101 		goto err_out;
6102 
6103 	rsp->StructureSize = cpu_to_le16(2);
6104 	rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
6105 			       sizeof(struct smb2_set_info_rsp));
6106 	if (rc)
6107 		goto err_out;
6108 	ksmbd_fd_put(work, fp);
6109 	return 0;
6110 
6111 err_out:
6112 	if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6113 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
6114 	else if (rc == -EINVAL)
6115 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6116 	else if (rc == -ESHARE)
6117 		rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6118 	else if (rc == -ENOENT)
6119 		rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6120 	else if (rc == -EBUSY || rc == -ENOTEMPTY)
6121 		rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6122 	else if (rc == -EAGAIN)
6123 		rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6124 	else if (rc == -EBADF || rc == -ESTALE)
6125 		rsp->hdr.Status = STATUS_INVALID_HANDLE;
6126 	else if (rc == -EEXIST)
6127 		rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6128 	else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6129 		rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6130 	smb2_set_err_rsp(work);
6131 	ksmbd_fd_put(work, fp);
6132 	ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6133 	return rc;
6134 }
6135 
6136 /**
6137  * smb2_read_pipe() - handler for smb2 read from IPC pipe
6138  * @work:	smb work containing read IPC pipe command buffer
6139  *
6140  * Return:	0 on success, otherwise error
6141  */
smb2_read_pipe(struct ksmbd_work * work)6142 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6143 {
6144 	int nbytes = 0, err;
6145 	u64 id;
6146 	struct ksmbd_rpc_command *rpc_resp;
6147 	struct smb2_read_req *req;
6148 	struct smb2_read_rsp *rsp;
6149 
6150 	WORK_BUFFERS(work, req, rsp);
6151 
6152 	id = req->VolatileFileId;
6153 
6154 	rpc_resp = ksmbd_rpc_read(work->sess, id);
6155 	if (rpc_resp) {
6156 		void *aux_payload_buf;
6157 
6158 		if (rpc_resp->flags != KSMBD_RPC_OK) {
6159 			err = -EINVAL;
6160 			goto out;
6161 		}
6162 
6163 		aux_payload_buf =
6164 			kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
6165 		if (!aux_payload_buf) {
6166 			err = -ENOMEM;
6167 			goto out;
6168 		}
6169 
6170 		memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
6171 
6172 		nbytes = rpc_resp->payload_sz;
6173 		err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6174 					     offsetof(struct smb2_read_rsp, Buffer),
6175 					     aux_payload_buf, nbytes);
6176 		if (err) {
6177 			kvfree(aux_payload_buf);
6178 			goto out;
6179 		}
6180 		kvfree(rpc_resp);
6181 	} else {
6182 		err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6183 					offsetof(struct smb2_read_rsp, Buffer));
6184 		if (err)
6185 			goto out;
6186 	}
6187 
6188 	rsp->StructureSize = cpu_to_le16(17);
6189 	rsp->DataOffset = 80;
6190 	rsp->Reserved = 0;
6191 	rsp->DataLength = cpu_to_le32(nbytes);
6192 	rsp->DataRemaining = 0;
6193 	rsp->Flags = 0;
6194 	return 0;
6195 
6196 out:
6197 	rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6198 	smb2_set_err_rsp(work);
6199 	kvfree(rpc_resp);
6200 	return err;
6201 }
6202 
smb2_set_remote_key_for_rdma(struct ksmbd_work * work,struct smb2_buffer_desc_v1 * desc,__le32 Channel,__le16 ChannelInfoLength)6203 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6204 					struct smb2_buffer_desc_v1 *desc,
6205 					__le32 Channel,
6206 					__le16 ChannelInfoLength)
6207 {
6208 	unsigned int i, ch_count;
6209 
6210 	if (work->conn->dialect == SMB30_PROT_ID &&
6211 	    Channel != SMB2_CHANNEL_RDMA_V1)
6212 		return -EINVAL;
6213 
6214 	ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6215 	if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6216 		for (i = 0; i < ch_count; i++) {
6217 			pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6218 				i,
6219 				le32_to_cpu(desc[i].token),
6220 				le32_to_cpu(desc[i].length));
6221 		}
6222 	}
6223 	if (!ch_count)
6224 		return -EINVAL;
6225 
6226 	work->need_invalidate_rkey =
6227 		(Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6228 	if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6229 		work->remote_key = le32_to_cpu(desc->token);
6230 	return 0;
6231 }
6232 
smb2_read_rdma_channel(struct ksmbd_work * work,struct smb2_read_req * req,void * data_buf,size_t length)6233 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6234 				      struct smb2_read_req *req, void *data_buf,
6235 				      size_t length)
6236 {
6237 	int err;
6238 
6239 	err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6240 				    (struct smb2_buffer_desc_v1 *)
6241 				    ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6242 				    le16_to_cpu(req->ReadChannelInfoLength));
6243 	if (err)
6244 		return err;
6245 
6246 	return length;
6247 }
6248 
6249 /**
6250  * smb2_read() - handler for smb2 read from file
6251  * @work:	smb work containing read command buffer
6252  *
6253  * Return:	0 on success, otherwise error
6254  */
smb2_read(struct ksmbd_work * work)6255 int smb2_read(struct ksmbd_work *work)
6256 {
6257 	struct ksmbd_conn *conn = work->conn;
6258 	struct smb2_read_req *req;
6259 	struct smb2_read_rsp *rsp;
6260 	struct ksmbd_file *fp = NULL;
6261 	loff_t offset;
6262 	size_t length, mincount;
6263 	ssize_t nbytes = 0, remain_bytes = 0;
6264 	int err = 0;
6265 	bool is_rdma_channel = false;
6266 	unsigned int max_read_size = conn->vals->max_read_size;
6267 	unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6268 	void *aux_payload_buf;
6269 
6270 	if (test_share_config_flag(work->tcon->share_conf,
6271 				   KSMBD_SHARE_FLAG_PIPE)) {
6272 		ksmbd_debug(SMB, "IPC pipe read request\n");
6273 		return smb2_read_pipe(work);
6274 	}
6275 
6276 	if (work->next_smb2_rcv_hdr_off) {
6277 		req = ksmbd_req_buf_next(work);
6278 		rsp = ksmbd_resp_buf_next(work);
6279 		if (!has_file_id(req->VolatileFileId)) {
6280 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6281 					work->compound_fid);
6282 			id = work->compound_fid;
6283 			pid = work->compound_pfid;
6284 		}
6285 	} else {
6286 		req = smb2_get_msg(work->request_buf);
6287 		rsp = smb2_get_msg(work->response_buf);
6288 	}
6289 
6290 	if (!has_file_id(id)) {
6291 		id = req->VolatileFileId;
6292 		pid = req->PersistentFileId;
6293 	}
6294 
6295 	if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6296 	    req->Channel == SMB2_CHANNEL_RDMA_V1) {
6297 		is_rdma_channel = true;
6298 		max_read_size = get_smbd_max_read_write_size();
6299 	}
6300 
6301 	if (is_rdma_channel == true) {
6302 		unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6303 
6304 		if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6305 			err = -EINVAL;
6306 			goto out;
6307 		}
6308 		err = smb2_set_remote_key_for_rdma(work,
6309 						   (struct smb2_buffer_desc_v1 *)
6310 						   ((char *)req + ch_offset),
6311 						   req->Channel,
6312 						   req->ReadChannelInfoLength);
6313 		if (err)
6314 			goto out;
6315 	}
6316 
6317 	fp = ksmbd_lookup_fd_slow(work, id, pid);
6318 	if (!fp) {
6319 		err = -ENOENT;
6320 		goto out;
6321 	}
6322 
6323 	if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6324 		pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6325 		err = -EACCES;
6326 		goto out;
6327 	}
6328 
6329 	offset = le64_to_cpu(req->Offset);
6330 	length = le32_to_cpu(req->Length);
6331 	mincount = le32_to_cpu(req->MinimumCount);
6332 
6333 	if (length > max_read_size) {
6334 		ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6335 			    max_read_size);
6336 		err = -EINVAL;
6337 		goto out;
6338 	}
6339 
6340 	ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6341 		    fp->filp, offset, length);
6342 
6343 	aux_payload_buf = kvzalloc(length, GFP_KERNEL);
6344 	if (!aux_payload_buf) {
6345 		err = -ENOMEM;
6346 		goto out;
6347 	}
6348 
6349 	nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
6350 	if (nbytes < 0) {
6351 		err = nbytes;
6352 		goto out;
6353 	}
6354 
6355 	if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6356 		kvfree(aux_payload_buf);
6357 		rsp->hdr.Status = STATUS_END_OF_FILE;
6358 		smb2_set_err_rsp(work);
6359 		ksmbd_fd_put(work, fp);
6360 		return 0;
6361 	}
6362 
6363 	ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6364 		    nbytes, offset, mincount);
6365 
6366 	if (is_rdma_channel == true) {
6367 		/* write data to the client using rdma channel */
6368 		remain_bytes = smb2_read_rdma_channel(work, req,
6369 						      aux_payload_buf,
6370 						      nbytes);
6371 		kvfree(aux_payload_buf);
6372 		aux_payload_buf = NULL;
6373 		nbytes = 0;
6374 		if (remain_bytes < 0) {
6375 			err = (int)remain_bytes;
6376 			goto out;
6377 		}
6378 	}
6379 
6380 	rsp->StructureSize = cpu_to_le16(17);
6381 	rsp->DataOffset = 80;
6382 	rsp->Reserved = 0;
6383 	rsp->DataLength = cpu_to_le32(nbytes);
6384 	rsp->DataRemaining = cpu_to_le32(remain_bytes);
6385 	rsp->Flags = 0;
6386 	err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
6387 				     offsetof(struct smb2_read_rsp, Buffer),
6388 				     aux_payload_buf, nbytes);
6389 	if (err) {
6390 		kvfree(aux_payload_buf);
6391 		goto out;
6392 	}
6393 	ksmbd_fd_put(work, fp);
6394 	return 0;
6395 
6396 out:
6397 	if (err) {
6398 		if (err == -EISDIR)
6399 			rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6400 		else if (err == -EAGAIN)
6401 			rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6402 		else if (err == -ENOENT)
6403 			rsp->hdr.Status = STATUS_FILE_CLOSED;
6404 		else if (err == -EACCES)
6405 			rsp->hdr.Status = STATUS_ACCESS_DENIED;
6406 		else if (err == -ESHARE)
6407 			rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6408 		else if (err == -EINVAL)
6409 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6410 		else
6411 			rsp->hdr.Status = STATUS_INVALID_HANDLE;
6412 
6413 		smb2_set_err_rsp(work);
6414 	}
6415 	ksmbd_fd_put(work, fp);
6416 	return err;
6417 }
6418 
6419 /**
6420  * smb2_write_pipe() - handler for smb2 write on IPC pipe
6421  * @work:	smb work containing write IPC pipe command buffer
6422  *
6423  * Return:	0 on success, otherwise error
6424  */
smb2_write_pipe(struct ksmbd_work * work)6425 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6426 {
6427 	struct smb2_write_req *req;
6428 	struct smb2_write_rsp *rsp;
6429 	struct ksmbd_rpc_command *rpc_resp;
6430 	u64 id = 0;
6431 	int err = 0, ret = 0;
6432 	char *data_buf;
6433 	size_t length;
6434 
6435 	WORK_BUFFERS(work, req, rsp);
6436 
6437 	length = le32_to_cpu(req->Length);
6438 	id = req->VolatileFileId;
6439 
6440 	if ((u64)le16_to_cpu(req->DataOffset) + length >
6441 	    get_rfc1002_len(work->request_buf)) {
6442 		pr_err("invalid write data offset %u, smb_len %u\n",
6443 		       le16_to_cpu(req->DataOffset),
6444 		       get_rfc1002_len(work->request_buf));
6445 		err = -EINVAL;
6446 		goto out;
6447 	}
6448 
6449 	data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6450 			   le16_to_cpu(req->DataOffset));
6451 
6452 	rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6453 	if (rpc_resp) {
6454 		if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6455 			rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6456 			kvfree(rpc_resp);
6457 			smb2_set_err_rsp(work);
6458 			return -EOPNOTSUPP;
6459 		}
6460 		if (rpc_resp->flags != KSMBD_RPC_OK) {
6461 			rsp->hdr.Status = STATUS_INVALID_HANDLE;
6462 			smb2_set_err_rsp(work);
6463 			kvfree(rpc_resp);
6464 			return ret;
6465 		}
6466 		kvfree(rpc_resp);
6467 	}
6468 
6469 	rsp->StructureSize = cpu_to_le16(17);
6470 	rsp->DataOffset = 0;
6471 	rsp->Reserved = 0;
6472 	rsp->DataLength = cpu_to_le32(length);
6473 	rsp->DataRemaining = 0;
6474 	rsp->Reserved2 = 0;
6475 	err = ksmbd_iov_pin_rsp(work, (void *)rsp,
6476 				offsetof(struct smb2_write_rsp, Buffer));
6477 out:
6478 	if (err) {
6479 		rsp->hdr.Status = STATUS_INVALID_HANDLE;
6480 		smb2_set_err_rsp(work);
6481 	}
6482 
6483 	return err;
6484 }
6485 
smb2_write_rdma_channel(struct ksmbd_work * work,struct smb2_write_req * req,struct ksmbd_file * fp,loff_t offset,size_t length,bool sync)6486 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6487 				       struct smb2_write_req *req,
6488 				       struct ksmbd_file *fp,
6489 				       loff_t offset, size_t length, bool sync)
6490 {
6491 	char *data_buf;
6492 	int ret;
6493 	ssize_t nbytes;
6494 
6495 	data_buf = kvzalloc(length, GFP_KERNEL);
6496 	if (!data_buf)
6497 		return -ENOMEM;
6498 
6499 	ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6500 				   (struct smb2_buffer_desc_v1 *)
6501 				   ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6502 				   le16_to_cpu(req->WriteChannelInfoLength));
6503 	if (ret < 0) {
6504 		kvfree(data_buf);
6505 		return ret;
6506 	}
6507 
6508 	ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6509 	kvfree(data_buf);
6510 	if (ret < 0)
6511 		return ret;
6512 
6513 	return nbytes;
6514 }
6515 
6516 /**
6517  * smb2_write() - handler for smb2 write from file
6518  * @work:	smb work containing write command buffer
6519  *
6520  * Return:	0 on success, otherwise error
6521  */
smb2_write(struct ksmbd_work * work)6522 int smb2_write(struct ksmbd_work *work)
6523 {
6524 	struct smb2_write_req *req;
6525 	struct smb2_write_rsp *rsp;
6526 	struct ksmbd_file *fp = NULL;
6527 	loff_t offset;
6528 	size_t length;
6529 	ssize_t nbytes;
6530 	char *data_buf;
6531 	bool writethrough = false, is_rdma_channel = false;
6532 	int err = 0;
6533 	unsigned int max_write_size = work->conn->vals->max_write_size;
6534 
6535 	WORK_BUFFERS(work, req, rsp);
6536 
6537 	if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6538 		ksmbd_debug(SMB, "IPC pipe write request\n");
6539 		return smb2_write_pipe(work);
6540 	}
6541 
6542 	offset = le64_to_cpu(req->Offset);
6543 	length = le32_to_cpu(req->Length);
6544 
6545 	if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6546 	    req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6547 		is_rdma_channel = true;
6548 		max_write_size = get_smbd_max_read_write_size();
6549 		length = le32_to_cpu(req->RemainingBytes);
6550 	}
6551 
6552 	if (is_rdma_channel == true) {
6553 		unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6554 
6555 		if (req->Length != 0 || req->DataOffset != 0 ||
6556 		    ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6557 			err = -EINVAL;
6558 			goto out;
6559 		}
6560 		err = smb2_set_remote_key_for_rdma(work,
6561 						   (struct smb2_buffer_desc_v1 *)
6562 						   ((char *)req + ch_offset),
6563 						   req->Channel,
6564 						   req->WriteChannelInfoLength);
6565 		if (err)
6566 			goto out;
6567 	}
6568 
6569 	if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6570 		ksmbd_debug(SMB, "User does not have write permission\n");
6571 		err = -EACCES;
6572 		goto out;
6573 	}
6574 
6575 	fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6576 	if (!fp) {
6577 		err = -ENOENT;
6578 		goto out;
6579 	}
6580 
6581 	if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6582 		pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6583 		err = -EACCES;
6584 		goto out;
6585 	}
6586 
6587 	if (length > max_write_size) {
6588 		ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6589 			    max_write_size);
6590 		err = -EINVAL;
6591 		goto out;
6592 	}
6593 
6594 	ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6595 	if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6596 		writethrough = true;
6597 
6598 	if (is_rdma_channel == false) {
6599 		if (le16_to_cpu(req->DataOffset) <
6600 		    offsetof(struct smb2_write_req, Buffer)) {
6601 			err = -EINVAL;
6602 			goto out;
6603 		}
6604 
6605 		data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6606 				    le16_to_cpu(req->DataOffset));
6607 
6608 		ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6609 			    fp->filp, offset, length);
6610 		err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6611 				      writethrough, &nbytes);
6612 		if (err < 0)
6613 			goto out;
6614 	} else {
6615 		/* read data from the client using rdma channel, and
6616 		 * write the data.
6617 		 */
6618 		nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6619 						 writethrough);
6620 		if (nbytes < 0) {
6621 			err = (int)nbytes;
6622 			goto out;
6623 		}
6624 	}
6625 
6626 	rsp->StructureSize = cpu_to_le16(17);
6627 	rsp->DataOffset = 0;
6628 	rsp->Reserved = 0;
6629 	rsp->DataLength = cpu_to_le32(nbytes);
6630 	rsp->DataRemaining = 0;
6631 	rsp->Reserved2 = 0;
6632 	err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
6633 	if (err)
6634 		goto out;
6635 	ksmbd_fd_put(work, fp);
6636 	return 0;
6637 
6638 out:
6639 	if (err == -EAGAIN)
6640 		rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6641 	else if (err == -ENOSPC || err == -EFBIG)
6642 		rsp->hdr.Status = STATUS_DISK_FULL;
6643 	else if (err == -ENOENT)
6644 		rsp->hdr.Status = STATUS_FILE_CLOSED;
6645 	else if (err == -EACCES)
6646 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
6647 	else if (err == -ESHARE)
6648 		rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6649 	else if (err == -EINVAL)
6650 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6651 	else
6652 		rsp->hdr.Status = STATUS_INVALID_HANDLE;
6653 
6654 	smb2_set_err_rsp(work);
6655 	ksmbd_fd_put(work, fp);
6656 	return err;
6657 }
6658 
6659 /**
6660  * smb2_flush() - handler for smb2 flush file - fsync
6661  * @work:	smb work containing flush command buffer
6662  *
6663  * Return:	0 on success, otherwise error
6664  */
smb2_flush(struct ksmbd_work * work)6665 int smb2_flush(struct ksmbd_work *work)
6666 {
6667 	struct smb2_flush_req *req;
6668 	struct smb2_flush_rsp *rsp;
6669 	int err;
6670 
6671 	WORK_BUFFERS(work, req, rsp);
6672 
6673 	ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6674 
6675 	err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6676 	if (err)
6677 		goto out;
6678 
6679 	rsp->StructureSize = cpu_to_le16(4);
6680 	rsp->Reserved = 0;
6681 	return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
6682 
6683 out:
6684 	rsp->hdr.Status = STATUS_INVALID_HANDLE;
6685 	smb2_set_err_rsp(work);
6686 	return err;
6687 }
6688 
6689 /**
6690  * smb2_cancel() - handler for smb2 cancel command
6691  * @work:	smb work containing cancel command buffer
6692  *
6693  * Return:	0 on success, otherwise error
6694  */
smb2_cancel(struct ksmbd_work * work)6695 int smb2_cancel(struct ksmbd_work *work)
6696 {
6697 	struct ksmbd_conn *conn = work->conn;
6698 	struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6699 	struct smb2_hdr *chdr;
6700 	struct ksmbd_work *iter;
6701 	struct list_head *command_list;
6702 
6703 	if (work->next_smb2_rcv_hdr_off)
6704 		hdr = ksmbd_resp_buf_next(work);
6705 
6706 	ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6707 		    hdr->MessageId, hdr->Flags);
6708 
6709 	if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6710 		command_list = &conn->async_requests;
6711 
6712 		spin_lock(&conn->request_lock);
6713 		list_for_each_entry(iter, command_list,
6714 				    async_request_entry) {
6715 			chdr = smb2_get_msg(iter->request_buf);
6716 
6717 			if (iter->async_id !=
6718 			    le64_to_cpu(hdr->Id.AsyncId))
6719 				continue;
6720 
6721 			ksmbd_debug(SMB,
6722 				    "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6723 				    le64_to_cpu(hdr->Id.AsyncId),
6724 				    le16_to_cpu(chdr->Command));
6725 			iter->state = KSMBD_WORK_CANCELLED;
6726 			if (iter->cancel_fn)
6727 				iter->cancel_fn(iter->cancel_argv);
6728 			break;
6729 		}
6730 		spin_unlock(&conn->request_lock);
6731 	} else {
6732 		command_list = &conn->requests;
6733 
6734 		spin_lock(&conn->request_lock);
6735 		list_for_each_entry(iter, command_list, request_entry) {
6736 			chdr = smb2_get_msg(iter->request_buf);
6737 
6738 			if (chdr->MessageId != hdr->MessageId ||
6739 			    iter == work)
6740 				continue;
6741 
6742 			ksmbd_debug(SMB,
6743 				    "smb2 with mid %llu cancelled command = 0x%x\n",
6744 				    le64_to_cpu(hdr->MessageId),
6745 				    le16_to_cpu(chdr->Command));
6746 			iter->state = KSMBD_WORK_CANCELLED;
6747 			break;
6748 		}
6749 		spin_unlock(&conn->request_lock);
6750 	}
6751 
6752 	/* For SMB2_CANCEL command itself send no response*/
6753 	work->send_no_response = 1;
6754 	return 0;
6755 }
6756 
smb_flock_init(struct file * f)6757 struct file_lock *smb_flock_init(struct file *f)
6758 {
6759 	struct file_lock *fl;
6760 
6761 	fl = locks_alloc_lock();
6762 	if (!fl)
6763 		goto out;
6764 
6765 	locks_init_lock(fl);
6766 
6767 	fl->fl_owner = f;
6768 	fl->fl_pid = current->tgid;
6769 	fl->fl_file = f;
6770 	fl->fl_flags = FL_POSIX;
6771 	fl->fl_ops = NULL;
6772 	fl->fl_lmops = NULL;
6773 
6774 out:
6775 	return fl;
6776 }
6777 
smb2_set_flock_flags(struct file_lock * flock,int flags)6778 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6779 {
6780 	int cmd = -EINVAL;
6781 
6782 	/* Checking for wrong flag combination during lock request*/
6783 	switch (flags) {
6784 	case SMB2_LOCKFLAG_SHARED:
6785 		ksmbd_debug(SMB, "received shared request\n");
6786 		cmd = F_SETLKW;
6787 		flock->fl_type = F_RDLCK;
6788 		flock->fl_flags |= FL_SLEEP;
6789 		break;
6790 	case SMB2_LOCKFLAG_EXCLUSIVE:
6791 		ksmbd_debug(SMB, "received exclusive request\n");
6792 		cmd = F_SETLKW;
6793 		flock->fl_type = F_WRLCK;
6794 		flock->fl_flags |= FL_SLEEP;
6795 		break;
6796 	case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6797 		ksmbd_debug(SMB,
6798 			    "received shared & fail immediately request\n");
6799 		cmd = F_SETLK;
6800 		flock->fl_type = F_RDLCK;
6801 		break;
6802 	case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6803 		ksmbd_debug(SMB,
6804 			    "received exclusive & fail immediately request\n");
6805 		cmd = F_SETLK;
6806 		flock->fl_type = F_WRLCK;
6807 		break;
6808 	case SMB2_LOCKFLAG_UNLOCK:
6809 		ksmbd_debug(SMB, "received unlock request\n");
6810 		flock->fl_type = F_UNLCK;
6811 		cmd = F_SETLK;
6812 		break;
6813 	}
6814 
6815 	return cmd;
6816 }
6817 
smb2_lock_init(struct file_lock * flock,unsigned int cmd,int flags,struct list_head * lock_list)6818 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6819 					 unsigned int cmd, int flags,
6820 					 struct list_head *lock_list)
6821 {
6822 	struct ksmbd_lock *lock;
6823 
6824 	lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6825 	if (!lock)
6826 		return NULL;
6827 
6828 	lock->cmd = cmd;
6829 	lock->fl = flock;
6830 	lock->start = flock->fl_start;
6831 	lock->end = flock->fl_end;
6832 	lock->flags = flags;
6833 	if (lock->start == lock->end)
6834 		lock->zero_len = 1;
6835 	INIT_LIST_HEAD(&lock->clist);
6836 	INIT_LIST_HEAD(&lock->flist);
6837 	INIT_LIST_HEAD(&lock->llist);
6838 	list_add_tail(&lock->llist, lock_list);
6839 
6840 	return lock;
6841 }
6842 
smb2_remove_blocked_lock(void ** argv)6843 static void smb2_remove_blocked_lock(void **argv)
6844 {
6845 	struct file_lock *flock = (struct file_lock *)argv[0];
6846 
6847 	ksmbd_vfs_posix_lock_unblock(flock);
6848 	wake_up(&flock->fl_wait);
6849 }
6850 
lock_defer_pending(struct file_lock * fl)6851 static inline bool lock_defer_pending(struct file_lock *fl)
6852 {
6853 	/* check pending lock waiters */
6854 	return waitqueue_active(&fl->fl_wait);
6855 }
6856 
6857 /**
6858  * smb2_lock() - handler for smb2 file lock command
6859  * @work:	smb work containing lock command buffer
6860  *
6861  * Return:	0 on success, otherwise error
6862  */
smb2_lock(struct ksmbd_work * work)6863 int smb2_lock(struct ksmbd_work *work)
6864 {
6865 	struct smb2_lock_req *req;
6866 	struct smb2_lock_rsp *rsp;
6867 	struct smb2_lock_element *lock_ele;
6868 	struct ksmbd_file *fp = NULL;
6869 	struct file_lock *flock = NULL;
6870 	struct file *filp = NULL;
6871 	int lock_count;
6872 	int flags = 0;
6873 	int cmd = 0;
6874 	int err = -EIO, i, rc = 0;
6875 	u64 lock_start, lock_length;
6876 	struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6877 	struct ksmbd_conn *conn;
6878 	int nolock = 0;
6879 	LIST_HEAD(lock_list);
6880 	LIST_HEAD(rollback_list);
6881 	int prior_lock = 0;
6882 
6883 	WORK_BUFFERS(work, req, rsp);
6884 
6885 	ksmbd_debug(SMB, "Received lock request\n");
6886 	fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6887 	if (!fp) {
6888 		ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6889 		err = -ENOENT;
6890 		goto out2;
6891 	}
6892 
6893 	filp = fp->filp;
6894 	lock_count = le16_to_cpu(req->LockCount);
6895 	lock_ele = req->locks;
6896 
6897 	ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6898 	if (!lock_count) {
6899 		err = -EINVAL;
6900 		goto out2;
6901 	}
6902 
6903 	for (i = 0; i < lock_count; i++) {
6904 		flags = le32_to_cpu(lock_ele[i].Flags);
6905 
6906 		flock = smb_flock_init(filp);
6907 		if (!flock)
6908 			goto out;
6909 
6910 		cmd = smb2_set_flock_flags(flock, flags);
6911 
6912 		lock_start = le64_to_cpu(lock_ele[i].Offset);
6913 		lock_length = le64_to_cpu(lock_ele[i].Length);
6914 		if (lock_start > U64_MAX - lock_length) {
6915 			pr_err("Invalid lock range requested\n");
6916 			rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6917 			locks_free_lock(flock);
6918 			goto out;
6919 		}
6920 
6921 		if (lock_start > OFFSET_MAX)
6922 			flock->fl_start = OFFSET_MAX;
6923 		else
6924 			flock->fl_start = lock_start;
6925 
6926 		lock_length = le64_to_cpu(lock_ele[i].Length);
6927 		if (lock_length > OFFSET_MAX - flock->fl_start)
6928 			lock_length = OFFSET_MAX - flock->fl_start;
6929 
6930 		flock->fl_end = flock->fl_start + lock_length;
6931 
6932 		if (flock->fl_end < flock->fl_start) {
6933 			ksmbd_debug(SMB,
6934 				    "the end offset(%llx) is smaller than the start offset(%llx)\n",
6935 				    flock->fl_end, flock->fl_start);
6936 			rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6937 			locks_free_lock(flock);
6938 			goto out;
6939 		}
6940 
6941 		/* Check conflict locks in one request */
6942 		list_for_each_entry(cmp_lock, &lock_list, llist) {
6943 			if (cmp_lock->fl->fl_start <= flock->fl_start &&
6944 			    cmp_lock->fl->fl_end >= flock->fl_end) {
6945 				if (cmp_lock->fl->fl_type != F_UNLCK &&
6946 				    flock->fl_type != F_UNLCK) {
6947 					pr_err("conflict two locks in one request\n");
6948 					err = -EINVAL;
6949 					locks_free_lock(flock);
6950 					goto out;
6951 				}
6952 			}
6953 		}
6954 
6955 		smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6956 		if (!smb_lock) {
6957 			err = -EINVAL;
6958 			locks_free_lock(flock);
6959 			goto out;
6960 		}
6961 	}
6962 
6963 	list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6964 		if (smb_lock->cmd < 0) {
6965 			err = -EINVAL;
6966 			goto out;
6967 		}
6968 
6969 		if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6970 			err = -EINVAL;
6971 			goto out;
6972 		}
6973 
6974 		if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6975 		     smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6976 		    (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6977 		     !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6978 			err = -EINVAL;
6979 			goto out;
6980 		}
6981 
6982 		prior_lock = smb_lock->flags;
6983 
6984 		if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6985 		    !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6986 			goto no_check_cl;
6987 
6988 		nolock = 1;
6989 		/* check locks in connection list */
6990 		down_read(&conn_list_lock);
6991 		list_for_each_entry(conn, &conn_list, conns_list) {
6992 			spin_lock(&conn->llist_lock);
6993 			list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6994 				if (file_inode(cmp_lock->fl->fl_file) !=
6995 				    file_inode(smb_lock->fl->fl_file))
6996 					continue;
6997 
6998 				if (smb_lock->fl->fl_type == F_UNLCK) {
6999 					if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
7000 					    cmp_lock->start == smb_lock->start &&
7001 					    cmp_lock->end == smb_lock->end &&
7002 					    !lock_defer_pending(cmp_lock->fl)) {
7003 						nolock = 0;
7004 						list_del(&cmp_lock->flist);
7005 						list_del(&cmp_lock->clist);
7006 						spin_unlock(&conn->llist_lock);
7007 						up_read(&conn_list_lock);
7008 
7009 						locks_free_lock(cmp_lock->fl);
7010 						kfree(cmp_lock);
7011 						goto out_check_cl;
7012 					}
7013 					continue;
7014 				}
7015 
7016 				if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
7017 					if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
7018 						continue;
7019 				} else {
7020 					if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
7021 						continue;
7022 				}
7023 
7024 				/* check zero byte lock range */
7025 				if (cmp_lock->zero_len && !smb_lock->zero_len &&
7026 				    cmp_lock->start > smb_lock->start &&
7027 				    cmp_lock->start < smb_lock->end) {
7028 					spin_unlock(&conn->llist_lock);
7029 					up_read(&conn_list_lock);
7030 					pr_err("previous lock conflict with zero byte lock range\n");
7031 					goto out;
7032 				}
7033 
7034 				if (smb_lock->zero_len && !cmp_lock->zero_len &&
7035 				    smb_lock->start > cmp_lock->start &&
7036 				    smb_lock->start < cmp_lock->end) {
7037 					spin_unlock(&conn->llist_lock);
7038 					up_read(&conn_list_lock);
7039 					pr_err("current lock conflict with zero byte lock range\n");
7040 					goto out;
7041 				}
7042 
7043 				if (((cmp_lock->start <= smb_lock->start &&
7044 				      cmp_lock->end > smb_lock->start) ||
7045 				     (cmp_lock->start < smb_lock->end &&
7046 				      cmp_lock->end >= smb_lock->end)) &&
7047 				    !cmp_lock->zero_len && !smb_lock->zero_len) {
7048 					spin_unlock(&conn->llist_lock);
7049 					up_read(&conn_list_lock);
7050 					pr_err("Not allow lock operation on exclusive lock range\n");
7051 					goto out;
7052 				}
7053 			}
7054 			spin_unlock(&conn->llist_lock);
7055 		}
7056 		up_read(&conn_list_lock);
7057 out_check_cl:
7058 		if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
7059 			pr_err("Try to unlock nolocked range\n");
7060 			rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7061 			goto out;
7062 		}
7063 
7064 no_check_cl:
7065 		if (smb_lock->zero_len) {
7066 			err = 0;
7067 			goto skip;
7068 		}
7069 
7070 		flock = smb_lock->fl;
7071 		list_del(&smb_lock->llist);
7072 retry:
7073 		rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7074 skip:
7075 		if (flags & SMB2_LOCKFLAG_UNLOCK) {
7076 			if (!rc) {
7077 				ksmbd_debug(SMB, "File unlocked\n");
7078 			} else if (rc == -ENOENT) {
7079 				rsp->hdr.Status = STATUS_NOT_LOCKED;
7080 				goto out;
7081 			}
7082 			locks_free_lock(flock);
7083 			kfree(smb_lock);
7084 		} else {
7085 			if (rc == FILE_LOCK_DEFERRED) {
7086 				void **argv;
7087 
7088 				ksmbd_debug(SMB,
7089 					    "would have to wait for getting lock\n");
7090 				list_add(&smb_lock->llist, &rollback_list);
7091 
7092 				argv = kmalloc(sizeof(void *), GFP_KERNEL);
7093 				if (!argv) {
7094 					err = -ENOMEM;
7095 					goto out;
7096 				}
7097 				argv[0] = flock;
7098 
7099 				rc = setup_async_work(work,
7100 						      smb2_remove_blocked_lock,
7101 						      argv);
7102 				if (rc) {
7103 					kfree(argv);
7104 					err = -ENOMEM;
7105 					goto out;
7106 				}
7107 				spin_lock(&fp->f_lock);
7108 				list_add(&work->fp_entry, &fp->blocked_works);
7109 				spin_unlock(&fp->f_lock);
7110 
7111 				smb2_send_interim_resp(work, STATUS_PENDING);
7112 
7113 				ksmbd_vfs_posix_lock_wait(flock);
7114 
7115 				spin_lock(&fp->f_lock);
7116 				list_del(&work->fp_entry);
7117 				spin_unlock(&fp->f_lock);
7118 
7119 				if (work->state != KSMBD_WORK_ACTIVE) {
7120 					list_del(&smb_lock->llist);
7121 					locks_free_lock(flock);
7122 
7123 					if (work->state == KSMBD_WORK_CANCELLED) {
7124 						rsp->hdr.Status =
7125 							STATUS_CANCELLED;
7126 						kfree(smb_lock);
7127 						smb2_send_interim_resp(work,
7128 								       STATUS_CANCELLED);
7129 						work->send_no_response = 1;
7130 						goto out;
7131 					}
7132 
7133 					rsp->hdr.Status =
7134 						STATUS_RANGE_NOT_LOCKED;
7135 					kfree(smb_lock);
7136 					goto out2;
7137 				}
7138 
7139 				list_del(&smb_lock->llist);
7140 				release_async_work(work);
7141 				goto retry;
7142 			} else if (!rc) {
7143 				list_add(&smb_lock->llist, &rollback_list);
7144 				spin_lock(&work->conn->llist_lock);
7145 				list_add_tail(&smb_lock->clist,
7146 					      &work->conn->lock_list);
7147 				list_add_tail(&smb_lock->flist,
7148 					      &fp->lock_list);
7149 				spin_unlock(&work->conn->llist_lock);
7150 				ksmbd_debug(SMB, "successful in taking lock\n");
7151 			} else {
7152 				goto out;
7153 			}
7154 		}
7155 	}
7156 
7157 	if (atomic_read(&fp->f_ci->op_count) > 1)
7158 		smb_break_all_oplock(work, fp);
7159 
7160 	rsp->StructureSize = cpu_to_le16(4);
7161 	ksmbd_debug(SMB, "successful in taking lock\n");
7162 	rsp->hdr.Status = STATUS_SUCCESS;
7163 	rsp->Reserved = 0;
7164 	err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
7165 	if (err)
7166 		goto out;
7167 
7168 	ksmbd_fd_put(work, fp);
7169 	return 0;
7170 
7171 out:
7172 	list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7173 		locks_free_lock(smb_lock->fl);
7174 		list_del(&smb_lock->llist);
7175 		kfree(smb_lock);
7176 	}
7177 
7178 	list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7179 		struct file_lock *rlock = NULL;
7180 
7181 		rlock = smb_flock_init(filp);
7182 		rlock->fl_type = F_UNLCK;
7183 		rlock->fl_start = smb_lock->start;
7184 		rlock->fl_end = smb_lock->end;
7185 
7186 		rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
7187 		if (rc)
7188 			pr_err("rollback unlock fail : %d\n", rc);
7189 
7190 		list_del(&smb_lock->llist);
7191 		spin_lock(&work->conn->llist_lock);
7192 		if (!list_empty(&smb_lock->flist))
7193 			list_del(&smb_lock->flist);
7194 		list_del(&smb_lock->clist);
7195 		spin_unlock(&work->conn->llist_lock);
7196 
7197 		locks_free_lock(smb_lock->fl);
7198 		locks_free_lock(rlock);
7199 		kfree(smb_lock);
7200 	}
7201 out2:
7202 	ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7203 
7204 	if (!rsp->hdr.Status) {
7205 		if (err == -EINVAL)
7206 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7207 		else if (err == -ENOMEM)
7208 			rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7209 		else if (err == -ENOENT)
7210 			rsp->hdr.Status = STATUS_FILE_CLOSED;
7211 		else
7212 			rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7213 	}
7214 
7215 	smb2_set_err_rsp(work);
7216 	ksmbd_fd_put(work, fp);
7217 	return err;
7218 }
7219 
fsctl_copychunk(struct ksmbd_work * work,struct copychunk_ioctl_req * ci_req,unsigned int cnt_code,unsigned int input_count,unsigned long long volatile_id,unsigned long long persistent_id,struct smb2_ioctl_rsp * rsp)7220 static int fsctl_copychunk(struct ksmbd_work *work,
7221 			   struct copychunk_ioctl_req *ci_req,
7222 			   unsigned int cnt_code,
7223 			   unsigned int input_count,
7224 			   unsigned long long volatile_id,
7225 			   unsigned long long persistent_id,
7226 			   struct smb2_ioctl_rsp *rsp)
7227 {
7228 	struct copychunk_ioctl_rsp *ci_rsp;
7229 	struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7230 	struct srv_copychunk *chunks;
7231 	unsigned int i, chunk_count, chunk_count_written = 0;
7232 	unsigned int chunk_size_written = 0;
7233 	loff_t total_size_written = 0;
7234 	int ret = 0;
7235 
7236 	ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7237 
7238 	rsp->VolatileFileId = volatile_id;
7239 	rsp->PersistentFileId = persistent_id;
7240 	ci_rsp->ChunksWritten =
7241 		cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7242 	ci_rsp->ChunkBytesWritten =
7243 		cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7244 	ci_rsp->TotalBytesWritten =
7245 		cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7246 
7247 	chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7248 	chunk_count = le32_to_cpu(ci_req->ChunkCount);
7249 	if (chunk_count == 0)
7250 		goto out;
7251 	total_size_written = 0;
7252 
7253 	/* verify the SRV_COPYCHUNK_COPY packet */
7254 	if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7255 	    input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7256 	     chunk_count * sizeof(struct srv_copychunk)) {
7257 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7258 		return -EINVAL;
7259 	}
7260 
7261 	for (i = 0; i < chunk_count; i++) {
7262 		if (le32_to_cpu(chunks[i].Length) == 0 ||
7263 		    le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7264 			break;
7265 		total_size_written += le32_to_cpu(chunks[i].Length);
7266 	}
7267 
7268 	if (i < chunk_count ||
7269 	    total_size_written > ksmbd_server_side_copy_max_total_size()) {
7270 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7271 		return -EINVAL;
7272 	}
7273 
7274 	src_fp = ksmbd_lookup_foreign_fd(work,
7275 					 le64_to_cpu(ci_req->ResumeKey[0]));
7276 	dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7277 	ret = -EINVAL;
7278 	if (!src_fp ||
7279 	    src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7280 		rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7281 		goto out;
7282 	}
7283 
7284 	if (!dst_fp) {
7285 		rsp->hdr.Status = STATUS_FILE_CLOSED;
7286 		goto out;
7287 	}
7288 
7289 	/*
7290 	 * FILE_READ_DATA should only be included in
7291 	 * the FSCTL_COPYCHUNK case
7292 	 */
7293 	if (cnt_code == FSCTL_COPYCHUNK &&
7294 	    !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7295 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
7296 		goto out;
7297 	}
7298 
7299 	ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7300 					 chunks, chunk_count,
7301 					 &chunk_count_written,
7302 					 &chunk_size_written,
7303 					 &total_size_written);
7304 	if (ret < 0) {
7305 		if (ret == -EACCES)
7306 			rsp->hdr.Status = STATUS_ACCESS_DENIED;
7307 		if (ret == -EAGAIN)
7308 			rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7309 		else if (ret == -EBADF)
7310 			rsp->hdr.Status = STATUS_INVALID_HANDLE;
7311 		else if (ret == -EFBIG || ret == -ENOSPC)
7312 			rsp->hdr.Status = STATUS_DISK_FULL;
7313 		else if (ret == -EINVAL)
7314 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7315 		else if (ret == -EISDIR)
7316 			rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7317 		else if (ret == -E2BIG)
7318 			rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7319 		else
7320 			rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7321 	}
7322 
7323 	ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7324 	ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7325 	ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7326 out:
7327 	ksmbd_fd_put(work, src_fp);
7328 	ksmbd_fd_put(work, dst_fp);
7329 	return ret;
7330 }
7331 
idev_ipv4_address(struct in_device * idev)7332 static __be32 idev_ipv4_address(struct in_device *idev)
7333 {
7334 	__be32 addr = 0;
7335 
7336 	struct in_ifaddr *ifa;
7337 
7338 	rcu_read_lock();
7339 	in_dev_for_each_ifa_rcu(ifa, idev) {
7340 		if (ifa->ifa_flags & IFA_F_SECONDARY)
7341 			continue;
7342 
7343 		addr = ifa->ifa_address;
7344 		break;
7345 	}
7346 	rcu_read_unlock();
7347 	return addr;
7348 }
7349 
fsctl_query_iface_info_ioctl(struct ksmbd_conn * conn,struct smb2_ioctl_rsp * rsp,unsigned int out_buf_len)7350 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7351 					struct smb2_ioctl_rsp *rsp,
7352 					unsigned int out_buf_len)
7353 {
7354 	struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7355 	int nbytes = 0;
7356 	struct net_device *netdev;
7357 	struct sockaddr_storage_rsp *sockaddr_storage;
7358 	unsigned int flags;
7359 	unsigned long long speed;
7360 
7361 	rtnl_lock();
7362 	for_each_netdev(&init_net, netdev) {
7363 		bool ipv4_set = false;
7364 
7365 		if (netdev->type == ARPHRD_LOOPBACK)
7366 			continue;
7367 
7368 		flags = dev_get_flags(netdev);
7369 		if (!(flags & IFF_RUNNING))
7370 			continue;
7371 ipv6_retry:
7372 		if (out_buf_len <
7373 		    nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7374 			rtnl_unlock();
7375 			return -ENOSPC;
7376 		}
7377 
7378 		nii_rsp = (struct network_interface_info_ioctl_rsp *)
7379 				&rsp->Buffer[nbytes];
7380 		nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7381 
7382 		nii_rsp->Capability = 0;
7383 		if (netdev->real_num_tx_queues > 1)
7384 			nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7385 		if (ksmbd_rdma_capable_netdev(netdev))
7386 			nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7387 
7388 		nii_rsp->Next = cpu_to_le32(152);
7389 		nii_rsp->Reserved = 0;
7390 
7391 		if (netdev->ethtool_ops->get_link_ksettings) {
7392 			struct ethtool_link_ksettings cmd;
7393 
7394 			netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7395 			speed = cmd.base.speed;
7396 		} else {
7397 			ksmbd_debug(SMB, "%s %s\n", netdev->name,
7398 				    "speed is unknown, defaulting to 1Gb/sec");
7399 			speed = SPEED_1000;
7400 		}
7401 
7402 		speed *= 1000000;
7403 		nii_rsp->LinkSpeed = cpu_to_le64(speed);
7404 
7405 		sockaddr_storage = (struct sockaddr_storage_rsp *)
7406 					nii_rsp->SockAddr_Storage;
7407 		memset(sockaddr_storage, 0, 128);
7408 
7409 		if (!ipv4_set) {
7410 			struct in_device *idev;
7411 
7412 			sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7413 			sockaddr_storage->addr4.Port = 0;
7414 
7415 			idev = __in_dev_get_rtnl(netdev);
7416 			if (!idev)
7417 				continue;
7418 			sockaddr_storage->addr4.IPv4address =
7419 						idev_ipv4_address(idev);
7420 			nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7421 			ipv4_set = true;
7422 			goto ipv6_retry;
7423 		} else {
7424 			struct inet6_dev *idev6;
7425 			struct inet6_ifaddr *ifa;
7426 			__u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7427 
7428 			sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7429 			sockaddr_storage->addr6.Port = 0;
7430 			sockaddr_storage->addr6.FlowInfo = 0;
7431 
7432 			idev6 = __in6_dev_get(netdev);
7433 			if (!idev6)
7434 				continue;
7435 
7436 			list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7437 				if (ifa->flags & (IFA_F_TENTATIVE |
7438 							IFA_F_DEPRECATED))
7439 					continue;
7440 				memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7441 				break;
7442 			}
7443 			sockaddr_storage->addr6.ScopeId = 0;
7444 			nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7445 		}
7446 	}
7447 	rtnl_unlock();
7448 
7449 	/* zero if this is last one */
7450 	if (nii_rsp)
7451 		nii_rsp->Next = 0;
7452 
7453 	rsp->PersistentFileId = SMB2_NO_FID;
7454 	rsp->VolatileFileId = SMB2_NO_FID;
7455 	return nbytes;
7456 }
7457 
fsctl_validate_negotiate_info(struct ksmbd_conn * conn,struct validate_negotiate_info_req * neg_req,struct validate_negotiate_info_rsp * neg_rsp,unsigned int in_buf_len)7458 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7459 					 struct validate_negotiate_info_req *neg_req,
7460 					 struct validate_negotiate_info_rsp *neg_rsp,
7461 					 unsigned int in_buf_len)
7462 {
7463 	int ret = 0;
7464 	int dialect;
7465 
7466 	if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7467 			le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7468 		return -EINVAL;
7469 
7470 	dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7471 					     neg_req->DialectCount);
7472 	if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7473 		ret = -EINVAL;
7474 		goto err_out;
7475 	}
7476 
7477 	if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7478 		ret = -EINVAL;
7479 		goto err_out;
7480 	}
7481 
7482 	if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7483 		ret = -EINVAL;
7484 		goto err_out;
7485 	}
7486 
7487 	if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7488 		ret = -EINVAL;
7489 		goto err_out;
7490 	}
7491 
7492 	neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7493 	memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7494 	neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7495 	neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7496 err_out:
7497 	return ret;
7498 }
7499 
fsctl_query_allocated_ranges(struct ksmbd_work * work,u64 id,struct file_allocated_range_buffer * qar_req,struct file_allocated_range_buffer * qar_rsp,unsigned int in_count,unsigned int * out_count)7500 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7501 					struct file_allocated_range_buffer *qar_req,
7502 					struct file_allocated_range_buffer *qar_rsp,
7503 					unsigned int in_count, unsigned int *out_count)
7504 {
7505 	struct ksmbd_file *fp;
7506 	loff_t start, length;
7507 	int ret = 0;
7508 
7509 	*out_count = 0;
7510 	if (in_count == 0)
7511 		return -EINVAL;
7512 
7513 	start = le64_to_cpu(qar_req->file_offset);
7514 	length = le64_to_cpu(qar_req->length);
7515 
7516 	if (start < 0 || length < 0)
7517 		return -EINVAL;
7518 
7519 	fp = ksmbd_lookup_fd_fast(work, id);
7520 	if (!fp)
7521 		return -ENOENT;
7522 
7523 	ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7524 				   qar_rsp, in_count, out_count);
7525 	if (ret && ret != -E2BIG)
7526 		*out_count = 0;
7527 
7528 	ksmbd_fd_put(work, fp);
7529 	return ret;
7530 }
7531 
fsctl_pipe_transceive(struct ksmbd_work * work,u64 id,unsigned int out_buf_len,struct smb2_ioctl_req * req,struct smb2_ioctl_rsp * rsp)7532 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7533 				 unsigned int out_buf_len,
7534 				 struct smb2_ioctl_req *req,
7535 				 struct smb2_ioctl_rsp *rsp)
7536 {
7537 	struct ksmbd_rpc_command *rpc_resp;
7538 	char *data_buf = (char *)&req->Buffer[0];
7539 	int nbytes = 0;
7540 
7541 	rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7542 				   le32_to_cpu(req->InputCount));
7543 	if (rpc_resp) {
7544 		if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7545 			/*
7546 			 * set STATUS_SOME_NOT_MAPPED response
7547 			 * for unknown domain sid.
7548 			 */
7549 			rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7550 		} else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7551 			rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7552 			goto out;
7553 		} else if (rpc_resp->flags != KSMBD_RPC_OK) {
7554 			rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7555 			goto out;
7556 		}
7557 
7558 		nbytes = rpc_resp->payload_sz;
7559 		if (rpc_resp->payload_sz > out_buf_len) {
7560 			rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7561 			nbytes = out_buf_len;
7562 		}
7563 
7564 		if (!rpc_resp->payload_sz) {
7565 			rsp->hdr.Status =
7566 				STATUS_UNEXPECTED_IO_ERROR;
7567 			goto out;
7568 		}
7569 
7570 		memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7571 	}
7572 out:
7573 	kvfree(rpc_resp);
7574 	return nbytes;
7575 }
7576 
fsctl_set_sparse(struct ksmbd_work * work,u64 id,struct file_sparse * sparse)7577 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7578 				   struct file_sparse *sparse)
7579 {
7580 	struct ksmbd_file *fp;
7581 	struct mnt_idmap *idmap;
7582 	int ret = 0;
7583 	__le32 old_fattr;
7584 
7585 	fp = ksmbd_lookup_fd_fast(work, id);
7586 	if (!fp)
7587 		return -ENOENT;
7588 	idmap = file_mnt_idmap(fp->filp);
7589 
7590 	old_fattr = fp->f_ci->m_fattr;
7591 	if (sparse->SetSparse)
7592 		fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7593 	else
7594 		fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7595 
7596 	if (fp->f_ci->m_fattr != old_fattr &&
7597 	    test_share_config_flag(work->tcon->share_conf,
7598 				   KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7599 		struct xattr_dos_attrib da;
7600 
7601 		ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
7602 						     fp->filp->f_path.dentry, &da);
7603 		if (ret <= 0)
7604 			goto out;
7605 
7606 		da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7607 		ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
7608 						     &fp->filp->f_path,
7609 						     &da, true);
7610 		if (ret)
7611 			fp->f_ci->m_fattr = old_fattr;
7612 	}
7613 
7614 out:
7615 	ksmbd_fd_put(work, fp);
7616 	return ret;
7617 }
7618 
fsctl_request_resume_key(struct ksmbd_work * work,struct smb2_ioctl_req * req,struct resume_key_ioctl_rsp * key_rsp)7619 static int fsctl_request_resume_key(struct ksmbd_work *work,
7620 				    struct smb2_ioctl_req *req,
7621 				    struct resume_key_ioctl_rsp *key_rsp)
7622 {
7623 	struct ksmbd_file *fp;
7624 
7625 	fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7626 	if (!fp)
7627 		return -ENOENT;
7628 
7629 	memset(key_rsp, 0, sizeof(*key_rsp));
7630 	key_rsp->ResumeKey[0] = req->VolatileFileId;
7631 	key_rsp->ResumeKey[1] = req->PersistentFileId;
7632 	ksmbd_fd_put(work, fp);
7633 
7634 	return 0;
7635 }
7636 
7637 /**
7638  * smb2_ioctl() - handler for smb2 ioctl command
7639  * @work:	smb work containing ioctl command buffer
7640  *
7641  * Return:	0 on success, otherwise error
7642  */
smb2_ioctl(struct ksmbd_work * work)7643 int smb2_ioctl(struct ksmbd_work *work)
7644 {
7645 	struct smb2_ioctl_req *req;
7646 	struct smb2_ioctl_rsp *rsp;
7647 	unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7648 	u64 id = KSMBD_NO_FID;
7649 	struct ksmbd_conn *conn = work->conn;
7650 	int ret = 0;
7651 
7652 	if (work->next_smb2_rcv_hdr_off) {
7653 		req = ksmbd_req_buf_next(work);
7654 		rsp = ksmbd_resp_buf_next(work);
7655 		if (!has_file_id(req->VolatileFileId)) {
7656 			ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7657 				    work->compound_fid);
7658 			id = work->compound_fid;
7659 		}
7660 	} else {
7661 		req = smb2_get_msg(work->request_buf);
7662 		rsp = smb2_get_msg(work->response_buf);
7663 	}
7664 
7665 	if (!has_file_id(id))
7666 		id = req->VolatileFileId;
7667 
7668 	if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7669 		rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7670 		goto out;
7671 	}
7672 
7673 	cnt_code = le32_to_cpu(req->CtlCode);
7674 	ret = smb2_calc_max_out_buf_len(work, 48,
7675 					le32_to_cpu(req->MaxOutputResponse));
7676 	if (ret < 0) {
7677 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7678 		goto out;
7679 	}
7680 	out_buf_len = (unsigned int)ret;
7681 	in_buf_len = le32_to_cpu(req->InputCount);
7682 
7683 	switch (cnt_code) {
7684 	case FSCTL_DFS_GET_REFERRALS:
7685 	case FSCTL_DFS_GET_REFERRALS_EX:
7686 		/* Not support DFS yet */
7687 		rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7688 		goto out;
7689 	case FSCTL_CREATE_OR_GET_OBJECT_ID:
7690 	{
7691 		struct file_object_buf_type1_ioctl_rsp *obj_buf;
7692 
7693 		nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7694 		obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7695 			&rsp->Buffer[0];
7696 
7697 		/*
7698 		 * TODO: This is dummy implementation to pass smbtorture
7699 		 * Need to check correct response later
7700 		 */
7701 		memset(obj_buf->ObjectId, 0x0, 16);
7702 		memset(obj_buf->BirthVolumeId, 0x0, 16);
7703 		memset(obj_buf->BirthObjectId, 0x0, 16);
7704 		memset(obj_buf->DomainId, 0x0, 16);
7705 
7706 		break;
7707 	}
7708 	case FSCTL_PIPE_TRANSCEIVE:
7709 		out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7710 		nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7711 		break;
7712 	case FSCTL_VALIDATE_NEGOTIATE_INFO:
7713 		if (conn->dialect < SMB30_PROT_ID) {
7714 			ret = -EOPNOTSUPP;
7715 			goto out;
7716 		}
7717 
7718 		if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7719 					  Dialects)) {
7720 			ret = -EINVAL;
7721 			goto out;
7722 		}
7723 
7724 		if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7725 			ret = -EINVAL;
7726 			goto out;
7727 		}
7728 
7729 		ret = fsctl_validate_negotiate_info(conn,
7730 			(struct validate_negotiate_info_req *)&req->Buffer[0],
7731 			(struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7732 			in_buf_len);
7733 		if (ret < 0)
7734 			goto out;
7735 
7736 		nbytes = sizeof(struct validate_negotiate_info_rsp);
7737 		rsp->PersistentFileId = SMB2_NO_FID;
7738 		rsp->VolatileFileId = SMB2_NO_FID;
7739 		break;
7740 	case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7741 		ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7742 		if (ret < 0)
7743 			goto out;
7744 		nbytes = ret;
7745 		break;
7746 	case FSCTL_REQUEST_RESUME_KEY:
7747 		if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7748 			ret = -EINVAL;
7749 			goto out;
7750 		}
7751 
7752 		ret = fsctl_request_resume_key(work, req,
7753 					       (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7754 		if (ret < 0)
7755 			goto out;
7756 		rsp->PersistentFileId = req->PersistentFileId;
7757 		rsp->VolatileFileId = req->VolatileFileId;
7758 		nbytes = sizeof(struct resume_key_ioctl_rsp);
7759 		break;
7760 	case FSCTL_COPYCHUNK:
7761 	case FSCTL_COPYCHUNK_WRITE:
7762 		if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7763 			ksmbd_debug(SMB,
7764 				    "User does not have write permission\n");
7765 			ret = -EACCES;
7766 			goto out;
7767 		}
7768 
7769 		if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7770 			ret = -EINVAL;
7771 			goto out;
7772 		}
7773 
7774 		if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7775 			ret = -EINVAL;
7776 			goto out;
7777 		}
7778 
7779 		nbytes = sizeof(struct copychunk_ioctl_rsp);
7780 		rsp->VolatileFileId = req->VolatileFileId;
7781 		rsp->PersistentFileId = req->PersistentFileId;
7782 		fsctl_copychunk(work,
7783 				(struct copychunk_ioctl_req *)&req->Buffer[0],
7784 				le32_to_cpu(req->CtlCode),
7785 				le32_to_cpu(req->InputCount),
7786 				req->VolatileFileId,
7787 				req->PersistentFileId,
7788 				rsp);
7789 		break;
7790 	case FSCTL_SET_SPARSE:
7791 		if (in_buf_len < sizeof(struct file_sparse)) {
7792 			ret = -EINVAL;
7793 			goto out;
7794 		}
7795 
7796 		ret = fsctl_set_sparse(work, id,
7797 				       (struct file_sparse *)&req->Buffer[0]);
7798 		if (ret < 0)
7799 			goto out;
7800 		break;
7801 	case FSCTL_SET_ZERO_DATA:
7802 	{
7803 		struct file_zero_data_information *zero_data;
7804 		struct ksmbd_file *fp;
7805 		loff_t off, len, bfz;
7806 
7807 		if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7808 			ksmbd_debug(SMB,
7809 				    "User does not have write permission\n");
7810 			ret = -EACCES;
7811 			goto out;
7812 		}
7813 
7814 		if (in_buf_len < sizeof(struct file_zero_data_information)) {
7815 			ret = -EINVAL;
7816 			goto out;
7817 		}
7818 
7819 		zero_data =
7820 			(struct file_zero_data_information *)&req->Buffer[0];
7821 
7822 		off = le64_to_cpu(zero_data->FileOffset);
7823 		bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7824 		if (off < 0 || bfz < 0 || off > bfz) {
7825 			ret = -EINVAL;
7826 			goto out;
7827 		}
7828 
7829 		len = bfz - off;
7830 		if (len) {
7831 			fp = ksmbd_lookup_fd_fast(work, id);
7832 			if (!fp) {
7833 				ret = -ENOENT;
7834 				goto out;
7835 			}
7836 
7837 			ret = ksmbd_vfs_zero_data(work, fp, off, len);
7838 			ksmbd_fd_put(work, fp);
7839 			if (ret < 0)
7840 				goto out;
7841 		}
7842 		break;
7843 	}
7844 	case FSCTL_QUERY_ALLOCATED_RANGES:
7845 		if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7846 			ret = -EINVAL;
7847 			goto out;
7848 		}
7849 
7850 		ret = fsctl_query_allocated_ranges(work, id,
7851 			(struct file_allocated_range_buffer *)&req->Buffer[0],
7852 			(struct file_allocated_range_buffer *)&rsp->Buffer[0],
7853 			out_buf_len /
7854 			sizeof(struct file_allocated_range_buffer), &nbytes);
7855 		if (ret == -E2BIG) {
7856 			rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7857 		} else if (ret < 0) {
7858 			nbytes = 0;
7859 			goto out;
7860 		}
7861 
7862 		nbytes *= sizeof(struct file_allocated_range_buffer);
7863 		break;
7864 	case FSCTL_GET_REPARSE_POINT:
7865 	{
7866 		struct reparse_data_buffer *reparse_ptr;
7867 		struct ksmbd_file *fp;
7868 
7869 		reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7870 		fp = ksmbd_lookup_fd_fast(work, id);
7871 		if (!fp) {
7872 			pr_err("not found fp!!\n");
7873 			ret = -ENOENT;
7874 			goto out;
7875 		}
7876 
7877 		reparse_ptr->ReparseTag =
7878 			smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7879 		reparse_ptr->ReparseDataLength = 0;
7880 		ksmbd_fd_put(work, fp);
7881 		nbytes = sizeof(struct reparse_data_buffer);
7882 		break;
7883 	}
7884 	case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7885 	{
7886 		struct ksmbd_file *fp_in, *fp_out = NULL;
7887 		struct duplicate_extents_to_file *dup_ext;
7888 		loff_t src_off, dst_off, length, cloned;
7889 
7890 		if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7891 			ret = -EINVAL;
7892 			goto out;
7893 		}
7894 
7895 		dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7896 
7897 		fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7898 					     dup_ext->PersistentFileHandle);
7899 		if (!fp_in) {
7900 			pr_err("not found file handle in duplicate extent to file\n");
7901 			ret = -ENOENT;
7902 			goto out;
7903 		}
7904 
7905 		fp_out = ksmbd_lookup_fd_fast(work, id);
7906 		if (!fp_out) {
7907 			pr_err("not found fp\n");
7908 			ret = -ENOENT;
7909 			goto dup_ext_out;
7910 		}
7911 
7912 		src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7913 		dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7914 		length = le64_to_cpu(dup_ext->ByteCount);
7915 		/*
7916 		 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7917 		 * should fall back to vfs_copy_file_range().  This could be
7918 		 * beneficial when re-exporting nfs/smb mount, but note that
7919 		 * this can result in partial copy that returns an error status.
7920 		 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7921 		 * fall back to vfs_copy_file_range(), should be avoided when
7922 		 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7923 		 */
7924 		cloned = vfs_clone_file_range(fp_in->filp, src_off,
7925 					      fp_out->filp, dst_off, length, 0);
7926 		if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7927 			ret = -EOPNOTSUPP;
7928 			goto dup_ext_out;
7929 		} else if (cloned != length) {
7930 			cloned = vfs_copy_file_range(fp_in->filp, src_off,
7931 						     fp_out->filp, dst_off,
7932 						     length, 0);
7933 			if (cloned != length) {
7934 				if (cloned < 0)
7935 					ret = cloned;
7936 				else
7937 					ret = -EINVAL;
7938 			}
7939 		}
7940 
7941 dup_ext_out:
7942 		ksmbd_fd_put(work, fp_in);
7943 		ksmbd_fd_put(work, fp_out);
7944 		if (ret < 0)
7945 			goto out;
7946 		break;
7947 	}
7948 	default:
7949 		ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7950 			    cnt_code);
7951 		ret = -EOPNOTSUPP;
7952 		goto out;
7953 	}
7954 
7955 	rsp->CtlCode = cpu_to_le32(cnt_code);
7956 	rsp->InputCount = cpu_to_le32(0);
7957 	rsp->InputOffset = cpu_to_le32(112);
7958 	rsp->OutputOffset = cpu_to_le32(112);
7959 	rsp->OutputCount = cpu_to_le32(nbytes);
7960 	rsp->StructureSize = cpu_to_le16(49);
7961 	rsp->Reserved = cpu_to_le16(0);
7962 	rsp->Flags = cpu_to_le32(0);
7963 	rsp->Reserved2 = cpu_to_le32(0);
7964 	ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
7965 	if (!ret)
7966 		return ret;
7967 
7968 out:
7969 	if (ret == -EACCES)
7970 		rsp->hdr.Status = STATUS_ACCESS_DENIED;
7971 	else if (ret == -ENOENT)
7972 		rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7973 	else if (ret == -EOPNOTSUPP)
7974 		rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7975 	else if (ret == -ENOSPC)
7976 		rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7977 	else if (ret < 0 || rsp->hdr.Status == 0)
7978 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7979 	smb2_set_err_rsp(work);
7980 	return 0;
7981 }
7982 
7983 /**
7984  * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7985  * @work:	smb work containing oplock break command buffer
7986  *
7987  * Return:	0
7988  */
smb20_oplock_break_ack(struct ksmbd_work * work)7989 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7990 {
7991 	struct smb2_oplock_break *req;
7992 	struct smb2_oplock_break *rsp;
7993 	struct ksmbd_file *fp;
7994 	struct oplock_info *opinfo = NULL;
7995 	__le32 err = 0;
7996 	int ret = 0;
7997 	u64 volatile_id, persistent_id;
7998 	char req_oplevel = 0, rsp_oplevel = 0;
7999 	unsigned int oplock_change_type;
8000 
8001 	WORK_BUFFERS(work, req, rsp);
8002 
8003 	volatile_id = req->VolatileFid;
8004 	persistent_id = req->PersistentFid;
8005 	req_oplevel = req->OplockLevel;
8006 	ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
8007 		    volatile_id, persistent_id, req_oplevel);
8008 
8009 	fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
8010 	if (!fp) {
8011 		rsp->hdr.Status = STATUS_FILE_CLOSED;
8012 		smb2_set_err_rsp(work);
8013 		return;
8014 	}
8015 
8016 	opinfo = opinfo_get(fp);
8017 	if (!opinfo) {
8018 		pr_err("unexpected null oplock_info\n");
8019 		rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8020 		smb2_set_err_rsp(work);
8021 		ksmbd_fd_put(work, fp);
8022 		return;
8023 	}
8024 
8025 	if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
8026 		rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
8027 		goto err_out;
8028 	}
8029 
8030 	if (opinfo->op_state == OPLOCK_STATE_NONE) {
8031 		ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
8032 		rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8033 		goto err_out;
8034 	}
8035 
8036 	if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8037 	     opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8038 	    (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
8039 	     req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
8040 		err = STATUS_INVALID_OPLOCK_PROTOCOL;
8041 		oplock_change_type = OPLOCK_WRITE_TO_NONE;
8042 	} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8043 		   req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
8044 		err = STATUS_INVALID_OPLOCK_PROTOCOL;
8045 		oplock_change_type = OPLOCK_READ_TO_NONE;
8046 	} else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
8047 		   req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8048 		err = STATUS_INVALID_DEVICE_STATE;
8049 		if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8050 		     opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8051 		    req_oplevel == SMB2_OPLOCK_LEVEL_II) {
8052 			oplock_change_type = OPLOCK_WRITE_TO_READ;
8053 		} else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
8054 			    opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
8055 			   req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8056 			oplock_change_type = OPLOCK_WRITE_TO_NONE;
8057 		} else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8058 			   req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8059 			oplock_change_type = OPLOCK_READ_TO_NONE;
8060 		} else {
8061 			oplock_change_type = 0;
8062 		}
8063 	} else {
8064 		oplock_change_type = 0;
8065 	}
8066 
8067 	switch (oplock_change_type) {
8068 	case OPLOCK_WRITE_TO_READ:
8069 		ret = opinfo_write_to_read(opinfo);
8070 		rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8071 		break;
8072 	case OPLOCK_WRITE_TO_NONE:
8073 		ret = opinfo_write_to_none(opinfo);
8074 		rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8075 		break;
8076 	case OPLOCK_READ_TO_NONE:
8077 		ret = opinfo_read_to_none(opinfo);
8078 		rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8079 		break;
8080 	default:
8081 		pr_err("unknown oplock change 0x%x -> 0x%x\n",
8082 		       opinfo->level, rsp_oplevel);
8083 	}
8084 
8085 	if (ret < 0) {
8086 		rsp->hdr.Status = err;
8087 		goto err_out;
8088 	}
8089 
8090 	opinfo->op_state = OPLOCK_STATE_NONE;
8091 	wake_up_interruptible_all(&opinfo->oplock_q);
8092 	opinfo_put(opinfo);
8093 	ksmbd_fd_put(work, fp);
8094 
8095 	rsp->StructureSize = cpu_to_le16(24);
8096 	rsp->OplockLevel = rsp_oplevel;
8097 	rsp->Reserved = 0;
8098 	rsp->Reserved2 = 0;
8099 	rsp->VolatileFid = volatile_id;
8100 	rsp->PersistentFid = persistent_id;
8101 	ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
8102 	if (!ret)
8103 		return;
8104 
8105 err_out:
8106 	opinfo->op_state = OPLOCK_STATE_NONE;
8107 	wake_up_interruptible_all(&opinfo->oplock_q);
8108 
8109 	opinfo_put(opinfo);
8110 	ksmbd_fd_put(work, fp);
8111 	smb2_set_err_rsp(work);
8112 }
8113 
check_lease_state(struct lease * lease,__le32 req_state)8114 static int check_lease_state(struct lease *lease, __le32 req_state)
8115 {
8116 	if ((lease->new_state ==
8117 	     (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8118 	    !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8119 		lease->new_state = req_state;
8120 		return 0;
8121 	}
8122 
8123 	if (lease->new_state == req_state)
8124 		return 0;
8125 
8126 	return 1;
8127 }
8128 
8129 /**
8130  * smb21_lease_break_ack() - handler for smb2.1 lease break command
8131  * @work:	smb work containing lease break command buffer
8132  *
8133  * Return:	0
8134  */
smb21_lease_break_ack(struct ksmbd_work * work)8135 static void smb21_lease_break_ack(struct ksmbd_work *work)
8136 {
8137 	struct ksmbd_conn *conn = work->conn;
8138 	struct smb2_lease_ack *req;
8139 	struct smb2_lease_ack *rsp;
8140 	struct oplock_info *opinfo;
8141 	__le32 err = 0;
8142 	int ret = 0;
8143 	unsigned int lease_change_type;
8144 	__le32 lease_state;
8145 	struct lease *lease;
8146 
8147 	WORK_BUFFERS(work, req, rsp);
8148 
8149 	ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8150 		    le32_to_cpu(req->LeaseState));
8151 	opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8152 	if (!opinfo) {
8153 		ksmbd_debug(OPLOCK, "file not opened\n");
8154 		smb2_set_err_rsp(work);
8155 		rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8156 		return;
8157 	}
8158 	lease = opinfo->o_lease;
8159 
8160 	if (opinfo->op_state == OPLOCK_STATE_NONE) {
8161 		pr_err("unexpected lease break state 0x%x\n",
8162 		       opinfo->op_state);
8163 		rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8164 		goto err_out;
8165 	}
8166 
8167 	if (check_lease_state(lease, req->LeaseState)) {
8168 		rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8169 		ksmbd_debug(OPLOCK,
8170 			    "req lease state: 0x%x, expected state: 0x%x\n",
8171 			    req->LeaseState, lease->new_state);
8172 		goto err_out;
8173 	}
8174 
8175 	if (!atomic_read(&opinfo->breaking_cnt)) {
8176 		rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8177 		goto err_out;
8178 	}
8179 
8180 	/* check for bad lease state */
8181 	if (req->LeaseState &
8182 	    (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8183 		err = STATUS_INVALID_OPLOCK_PROTOCOL;
8184 		if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8185 			lease_change_type = OPLOCK_WRITE_TO_NONE;
8186 		else
8187 			lease_change_type = OPLOCK_READ_TO_NONE;
8188 		ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8189 			    le32_to_cpu(lease->state),
8190 			    le32_to_cpu(req->LeaseState));
8191 	} else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8192 		   req->LeaseState != SMB2_LEASE_NONE_LE) {
8193 		err = STATUS_INVALID_OPLOCK_PROTOCOL;
8194 		lease_change_type = OPLOCK_READ_TO_NONE;
8195 		ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8196 			    le32_to_cpu(lease->state),
8197 			    le32_to_cpu(req->LeaseState));
8198 	} else {
8199 		/* valid lease state changes */
8200 		err = STATUS_INVALID_DEVICE_STATE;
8201 		if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8202 			if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8203 				lease_change_type = OPLOCK_WRITE_TO_NONE;
8204 			else
8205 				lease_change_type = OPLOCK_READ_TO_NONE;
8206 		} else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8207 			if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8208 				lease_change_type = OPLOCK_WRITE_TO_READ;
8209 			else
8210 				lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8211 		} else {
8212 			lease_change_type = 0;
8213 		}
8214 	}
8215 
8216 	switch (lease_change_type) {
8217 	case OPLOCK_WRITE_TO_READ:
8218 		ret = opinfo_write_to_read(opinfo);
8219 		break;
8220 	case OPLOCK_READ_HANDLE_TO_READ:
8221 		ret = opinfo_read_handle_to_read(opinfo);
8222 		break;
8223 	case OPLOCK_WRITE_TO_NONE:
8224 		ret = opinfo_write_to_none(opinfo);
8225 		break;
8226 	case OPLOCK_READ_TO_NONE:
8227 		ret = opinfo_read_to_none(opinfo);
8228 		break;
8229 	default:
8230 		ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8231 			    le32_to_cpu(lease->state),
8232 			    le32_to_cpu(req->LeaseState));
8233 	}
8234 
8235 	if (ret < 0) {
8236 		rsp->hdr.Status = err;
8237 		goto err_out;
8238 	}
8239 
8240 	lease_state = lease->state;
8241 	opinfo->op_state = OPLOCK_STATE_NONE;
8242 	wake_up_interruptible_all(&opinfo->oplock_q);
8243 	atomic_dec(&opinfo->breaking_cnt);
8244 	wake_up_interruptible_all(&opinfo->oplock_brk);
8245 	opinfo_put(opinfo);
8246 
8247 	rsp->StructureSize = cpu_to_le16(36);
8248 	rsp->Reserved = 0;
8249 	rsp->Flags = 0;
8250 	memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8251 	rsp->LeaseState = lease_state;
8252 	rsp->LeaseDuration = 0;
8253 	ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
8254 	if (!ret)
8255 		return;
8256 
8257 err_out:
8258 	wake_up_interruptible_all(&opinfo->oplock_q);
8259 	atomic_dec(&opinfo->breaking_cnt);
8260 	wake_up_interruptible_all(&opinfo->oplock_brk);
8261 
8262 	opinfo_put(opinfo);
8263 	smb2_set_err_rsp(work);
8264 }
8265 
8266 /**
8267  * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8268  * @work:	smb work containing oplock/lease break command buffer
8269  *
8270  * Return:	0
8271  */
smb2_oplock_break(struct ksmbd_work * work)8272 int smb2_oplock_break(struct ksmbd_work *work)
8273 {
8274 	struct smb2_oplock_break *req;
8275 	struct smb2_oplock_break *rsp;
8276 
8277 	WORK_BUFFERS(work, req, rsp);
8278 
8279 	switch (le16_to_cpu(req->StructureSize)) {
8280 	case OP_BREAK_STRUCT_SIZE_20:
8281 		smb20_oplock_break_ack(work);
8282 		break;
8283 	case OP_BREAK_STRUCT_SIZE_21:
8284 		smb21_lease_break_ack(work);
8285 		break;
8286 	default:
8287 		ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8288 			    le16_to_cpu(req->StructureSize));
8289 		rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8290 		smb2_set_err_rsp(work);
8291 	}
8292 
8293 	return 0;
8294 }
8295 
8296 /**
8297  * smb2_notify() - handler for smb2 notify request
8298  * @work:   smb work containing notify command buffer
8299  *
8300  * Return:      0
8301  */
smb2_notify(struct ksmbd_work * work)8302 int smb2_notify(struct ksmbd_work *work)
8303 {
8304 	struct smb2_change_notify_req *req;
8305 	struct smb2_change_notify_rsp *rsp;
8306 
8307 	WORK_BUFFERS(work, req, rsp);
8308 
8309 	if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8310 		rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8311 		smb2_set_err_rsp(work);
8312 		return 0;
8313 	}
8314 
8315 	smb2_set_err_rsp(work);
8316 	rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8317 	return 0;
8318 }
8319 
8320 /**
8321  * smb2_is_sign_req() - handler for checking packet signing status
8322  * @work:	smb work containing notify command buffer
8323  * @command:	SMB2 command id
8324  *
8325  * Return:	true if packed is signed, false otherwise
8326  */
smb2_is_sign_req(struct ksmbd_work * work,unsigned int command)8327 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8328 {
8329 	struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8330 
8331 	if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8332 	    command != SMB2_NEGOTIATE_HE &&
8333 	    command != SMB2_SESSION_SETUP_HE &&
8334 	    command != SMB2_OPLOCK_BREAK_HE)
8335 		return true;
8336 
8337 	return false;
8338 }
8339 
8340 /**
8341  * smb2_check_sign_req() - handler for req packet sign processing
8342  * @work:   smb work containing notify command buffer
8343  *
8344  * Return:	1 on success, 0 otherwise
8345  */
smb2_check_sign_req(struct ksmbd_work * work)8346 int smb2_check_sign_req(struct ksmbd_work *work)
8347 {
8348 	struct smb2_hdr *hdr;
8349 	char signature_req[SMB2_SIGNATURE_SIZE];
8350 	char signature[SMB2_HMACSHA256_SIZE];
8351 	struct kvec iov[1];
8352 	size_t len;
8353 
8354 	hdr = smb2_get_msg(work->request_buf);
8355 	if (work->next_smb2_rcv_hdr_off)
8356 		hdr = ksmbd_req_buf_next(work);
8357 
8358 	if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8359 		len = get_rfc1002_len(work->request_buf);
8360 	else if (hdr->NextCommand)
8361 		len = le32_to_cpu(hdr->NextCommand);
8362 	else
8363 		len = get_rfc1002_len(work->request_buf) -
8364 			work->next_smb2_rcv_hdr_off;
8365 
8366 	memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8367 	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8368 
8369 	iov[0].iov_base = (char *)&hdr->ProtocolId;
8370 	iov[0].iov_len = len;
8371 
8372 	if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8373 				signature))
8374 		return 0;
8375 
8376 	if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8377 		pr_err("bad smb2 signature\n");
8378 		return 0;
8379 	}
8380 
8381 	return 1;
8382 }
8383 
8384 /**
8385  * smb2_set_sign_rsp() - handler for rsp packet sign processing
8386  * @work:   smb work containing notify command buffer
8387  *
8388  */
smb2_set_sign_rsp(struct ksmbd_work * work)8389 void smb2_set_sign_rsp(struct ksmbd_work *work)
8390 {
8391 	struct smb2_hdr *hdr;
8392 	char signature[SMB2_HMACSHA256_SIZE];
8393 	struct kvec *iov;
8394 	int n_vec = 1;
8395 
8396 	hdr = ksmbd_resp_buf_curr(work);
8397 	hdr->Flags |= SMB2_FLAGS_SIGNED;
8398 	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8399 
8400 	if (hdr->Command == SMB2_READ) {
8401 		iov = &work->iov[work->iov_idx - 1];
8402 		n_vec++;
8403 	} else {
8404 		iov = &work->iov[work->iov_idx];
8405 	}
8406 
8407 	if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8408 				 signature))
8409 		memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8410 }
8411 
8412 /**
8413  * smb3_check_sign_req() - handler for req packet sign processing
8414  * @work:   smb work containing notify command buffer
8415  *
8416  * Return:	1 on success, 0 otherwise
8417  */
smb3_check_sign_req(struct ksmbd_work * work)8418 int smb3_check_sign_req(struct ksmbd_work *work)
8419 {
8420 	struct ksmbd_conn *conn = work->conn;
8421 	char *signing_key;
8422 	struct smb2_hdr *hdr;
8423 	struct channel *chann;
8424 	char signature_req[SMB2_SIGNATURE_SIZE];
8425 	char signature[SMB2_CMACAES_SIZE];
8426 	struct kvec iov[1];
8427 	size_t len;
8428 
8429 	hdr = smb2_get_msg(work->request_buf);
8430 	if (work->next_smb2_rcv_hdr_off)
8431 		hdr = ksmbd_req_buf_next(work);
8432 
8433 	if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8434 		len = get_rfc1002_len(work->request_buf);
8435 	else if (hdr->NextCommand)
8436 		len = le32_to_cpu(hdr->NextCommand);
8437 	else
8438 		len = get_rfc1002_len(work->request_buf) -
8439 			work->next_smb2_rcv_hdr_off;
8440 
8441 	if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8442 		signing_key = work->sess->smb3signingkey;
8443 	} else {
8444 		chann = lookup_chann_list(work->sess, conn);
8445 		if (!chann) {
8446 			return 0;
8447 		}
8448 		signing_key = chann->smb3signingkey;
8449 	}
8450 
8451 	if (!signing_key) {
8452 		pr_err("SMB3 signing key is not generated\n");
8453 		return 0;
8454 	}
8455 
8456 	memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8457 	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8458 	iov[0].iov_base = (char *)&hdr->ProtocolId;
8459 	iov[0].iov_len = len;
8460 
8461 	if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8462 		return 0;
8463 
8464 	if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8465 		pr_err("bad smb2 signature\n");
8466 		return 0;
8467 	}
8468 
8469 	return 1;
8470 }
8471 
8472 /**
8473  * smb3_set_sign_rsp() - handler for rsp packet sign processing
8474  * @work:   smb work containing notify command buffer
8475  *
8476  */
smb3_set_sign_rsp(struct ksmbd_work * work)8477 void smb3_set_sign_rsp(struct ksmbd_work *work)
8478 {
8479 	struct ksmbd_conn *conn = work->conn;
8480 	struct smb2_hdr *hdr;
8481 	struct channel *chann;
8482 	char signature[SMB2_CMACAES_SIZE];
8483 	struct kvec *iov;
8484 	int n_vec = 1;
8485 	char *signing_key;
8486 
8487 	hdr = ksmbd_resp_buf_curr(work);
8488 
8489 	if (conn->binding == false &&
8490 	    le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8491 		signing_key = work->sess->smb3signingkey;
8492 	} else {
8493 		chann = lookup_chann_list(work->sess, work->conn);
8494 		if (!chann) {
8495 			return;
8496 		}
8497 		signing_key = chann->smb3signingkey;
8498 	}
8499 
8500 	if (!signing_key)
8501 		return;
8502 
8503 	hdr->Flags |= SMB2_FLAGS_SIGNED;
8504 	memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8505 
8506 	if (hdr->Command == SMB2_READ) {
8507 		iov = &work->iov[work->iov_idx - 1];
8508 		n_vec++;
8509 	} else {
8510 		iov = &work->iov[work->iov_idx];
8511 	}
8512 
8513 	if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
8514 				 signature))
8515 		memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8516 }
8517 
8518 /**
8519  * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8520  * @work:   smb work containing response buffer
8521  *
8522  */
smb3_preauth_hash_rsp(struct ksmbd_work * work)8523 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8524 {
8525 	struct ksmbd_conn *conn = work->conn;
8526 	struct ksmbd_session *sess = work->sess;
8527 	struct smb2_hdr *req, *rsp;
8528 
8529 	if (conn->dialect != SMB311_PROT_ID)
8530 		return;
8531 
8532 	WORK_BUFFERS(work, req, rsp);
8533 
8534 	if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8535 	    conn->preauth_info)
8536 		ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8537 						 conn->preauth_info->Preauth_HashValue);
8538 
8539 	if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8540 		__u8 *hash_value;
8541 
8542 		if (conn->binding) {
8543 			struct preauth_session *preauth_sess;
8544 
8545 			preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8546 			if (!preauth_sess)
8547 				return;
8548 			hash_value = preauth_sess->Preauth_HashValue;
8549 		} else {
8550 			hash_value = sess->Preauth_HashValue;
8551 			if (!hash_value)
8552 				return;
8553 		}
8554 		ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8555 						 hash_value);
8556 	}
8557 }
8558 
fill_transform_hdr(void * tr_buf,char * old_buf,__le16 cipher_type)8559 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8560 {
8561 	struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8562 	struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8563 	unsigned int orig_len = get_rfc1002_len(old_buf);
8564 
8565 	/* tr_buf must be cleared by the caller */
8566 	tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8567 	tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8568 	tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8569 	if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8570 	    cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8571 		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8572 	else
8573 		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8574 	memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8575 	inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8576 	inc_rfc1001_len(tr_buf, orig_len);
8577 }
8578 
smb3_encrypt_resp(struct ksmbd_work * work)8579 int smb3_encrypt_resp(struct ksmbd_work *work)
8580 {
8581 	struct kvec *iov = work->iov;
8582 	int rc = -ENOMEM;
8583 	void *tr_buf;
8584 
8585 	tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8586 	if (!tr_buf)
8587 		return rc;
8588 
8589 	/* fill transform header */
8590 	fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
8591 
8592 	iov[0].iov_base = tr_buf;
8593 	iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8594 	work->tr_buf = tr_buf;
8595 
8596 	return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
8597 }
8598 
smb3_is_transform_hdr(void * buf)8599 bool smb3_is_transform_hdr(void *buf)
8600 {
8601 	struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8602 
8603 	return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8604 }
8605 
smb3_decrypt_req(struct ksmbd_work * work)8606 int smb3_decrypt_req(struct ksmbd_work *work)
8607 {
8608 	struct ksmbd_session *sess;
8609 	char *buf = work->request_buf;
8610 	unsigned int pdu_length = get_rfc1002_len(buf);
8611 	struct kvec iov[2];
8612 	int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8613 	struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8614 	int rc = 0;
8615 
8616 	if (pdu_length < sizeof(struct smb2_transform_hdr) ||
8617 	    buf_data_size < sizeof(struct smb2_hdr)) {
8618 		pr_err("Transform message is too small (%u)\n",
8619 		       pdu_length);
8620 		return -ECONNABORTED;
8621 	}
8622 
8623 	if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8624 		pr_err("Transform message is broken\n");
8625 		return -ECONNABORTED;
8626 	}
8627 
8628 	sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8629 	if (!sess) {
8630 		pr_err("invalid session id(%llx) in transform header\n",
8631 		       le64_to_cpu(tr_hdr->SessionId));
8632 		return -ECONNABORTED;
8633 	}
8634 
8635 	iov[0].iov_base = buf;
8636 	iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8637 	iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8638 	iov[1].iov_len = buf_data_size;
8639 	rc = ksmbd_crypt_message(work, iov, 2, 0);
8640 	if (rc)
8641 		return rc;
8642 
8643 	memmove(buf + 4, iov[1].iov_base, buf_data_size);
8644 	*(__be32 *)buf = cpu_to_be32(buf_data_size);
8645 
8646 	return rc;
8647 }
8648 
smb3_11_final_sess_setup_resp(struct ksmbd_work * work)8649 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8650 {
8651 	struct ksmbd_conn *conn = work->conn;
8652 	struct ksmbd_session *sess = work->sess;
8653 	struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8654 
8655 	if (conn->dialect < SMB30_PROT_ID)
8656 		return false;
8657 
8658 	if (work->next_smb2_rcv_hdr_off)
8659 		rsp = ksmbd_resp_buf_next(work);
8660 
8661 	if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8662 	    sess->user && !user_guest(sess->user) &&
8663 	    rsp->Status == STATUS_SUCCESS)
8664 		return true;
8665 	return false;
8666 }
8667