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
16 #include "glob.h"
17 #include "smbfsctl.h"
18 #include "oplock.h"
19 #include "smbacl.h"
20
21 #include "auth.h"
22 #include "asn1.h"
23 #include "connection.h"
24 #include "transport_ipc.h"
25 #include "transport_rdma.h"
26 #include "vfs.h"
27 #include "vfs_cache.h"
28 #include "misc.h"
29
30 #include "server.h"
31 #include "smb_common.h"
32 #include "smbstatus.h"
33 #include "ksmbd_work.h"
34 #include "mgmt/user_config.h"
35 #include "mgmt/share_config.h"
36 #include "mgmt/tree_connect.h"
37 #include "mgmt/user_session.h"
38 #include "mgmt/ksmbd_ida.h"
39 #include "ndr.h"
40
__wbuf(struct ksmbd_work * work,void ** req,void ** rsp)41 static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
42 {
43 if (work->next_smb2_rcv_hdr_off) {
44 *req = ksmbd_req_buf_next(work);
45 *rsp = ksmbd_resp_buf_next(work);
46 } else {
47 *req = smb2_get_msg(work->request_buf);
48 *rsp = smb2_get_msg(work->response_buf);
49 }
50 }
51
52 #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
53
54 /**
55 * check_session_id() - check for valid session id in smb header
56 * @conn: connection instance
57 * @id: session id from smb header
58 *
59 * Return: 1 if valid session id, otherwise 0
60 */
check_session_id(struct ksmbd_conn * conn,u64 id)61 static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
62 {
63 struct ksmbd_session *sess;
64
65 if (id == 0 || id == -1)
66 return false;
67
68 sess = ksmbd_session_lookup_all(conn, id);
69 if (sess)
70 return true;
71 pr_err("Invalid user session id: %llu\n", id);
72 return false;
73 }
74
lookup_chann_list(struct ksmbd_session * sess,struct ksmbd_conn * conn)75 struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
76 {
77 struct channel *chann;
78
79 list_for_each_entry(chann, &sess->ksmbd_chann_list, chann_list) {
80 if (chann->conn == conn)
81 return chann;
82 }
83
84 return NULL;
85 }
86
87 /**
88 * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
89 * @work: smb work
90 *
91 * Return: 0 if there is a tree connection matched or these are
92 * skipable commands, otherwise error
93 */
smb2_get_ksmbd_tcon(struct ksmbd_work * work)94 int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
95 {
96 struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
97 unsigned int cmd = le16_to_cpu(req_hdr->Command);
98 int tree_id;
99
100 work->tcon = NULL;
101 if (cmd == SMB2_TREE_CONNECT_HE ||
102 cmd == SMB2_CANCEL_HE ||
103 cmd == SMB2_LOGOFF_HE) {
104 ksmbd_debug(SMB, "skip to check tree connect request\n");
105 return 0;
106 }
107
108 if (xa_empty(&work->sess->tree_conns)) {
109 ksmbd_debug(SMB, "NO tree connected\n");
110 return -ENOENT;
111 }
112
113 tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
114 work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
115 if (!work->tcon) {
116 pr_err("Invalid tid %d\n", tree_id);
117 return -EINVAL;
118 }
119
120 return 1;
121 }
122
123 /**
124 * smb2_set_err_rsp() - set error response code on smb response
125 * @work: smb work containing response buffer
126 */
smb2_set_err_rsp(struct ksmbd_work * work)127 void smb2_set_err_rsp(struct ksmbd_work *work)
128 {
129 struct smb2_err_rsp *err_rsp;
130
131 if (work->next_smb2_rcv_hdr_off)
132 err_rsp = ksmbd_resp_buf_next(work);
133 else
134 err_rsp = smb2_get_msg(work->response_buf);
135
136 if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
137 err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
138 err_rsp->ErrorContextCount = 0;
139 err_rsp->Reserved = 0;
140 err_rsp->ByteCount = 0;
141 err_rsp->ErrorData[0] = 0;
142 inc_rfc1001_len(work->response_buf, SMB2_ERROR_STRUCTURE_SIZE2);
143 }
144 }
145
146 /**
147 * is_smb2_neg_cmd() - is it smb2 negotiation command
148 * @work: smb work containing smb header
149 *
150 * Return: true if smb2 negotiation command, otherwise false
151 */
is_smb2_neg_cmd(struct ksmbd_work * work)152 bool is_smb2_neg_cmd(struct ksmbd_work *work)
153 {
154 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
155
156 /* is it SMB2 header ? */
157 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
158 return false;
159
160 /* make sure it is request not response message */
161 if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
162 return false;
163
164 if (hdr->Command != SMB2_NEGOTIATE)
165 return false;
166
167 return true;
168 }
169
170 /**
171 * is_smb2_rsp() - is it smb2 response
172 * @work: smb work containing smb response buffer
173 *
174 * Return: true if smb2 response, otherwise false
175 */
is_smb2_rsp(struct ksmbd_work * work)176 bool is_smb2_rsp(struct ksmbd_work *work)
177 {
178 struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
179
180 /* is it SMB2 header ? */
181 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
182 return false;
183
184 /* make sure it is response not request message */
185 if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
186 return false;
187
188 return true;
189 }
190
191 /**
192 * get_smb2_cmd_val() - get smb command code from smb header
193 * @work: smb work containing smb request buffer
194 *
195 * Return: smb2 request command value
196 */
get_smb2_cmd_val(struct ksmbd_work * work)197 u16 get_smb2_cmd_val(struct ksmbd_work *work)
198 {
199 struct smb2_hdr *rcv_hdr;
200
201 if (work->next_smb2_rcv_hdr_off)
202 rcv_hdr = ksmbd_req_buf_next(work);
203 else
204 rcv_hdr = smb2_get_msg(work->request_buf);
205 return le16_to_cpu(rcv_hdr->Command);
206 }
207
208 /**
209 * set_smb2_rsp_status() - set error response code on smb2 header
210 * @work: smb work containing response buffer
211 * @err: error response code
212 */
set_smb2_rsp_status(struct ksmbd_work * work,__le32 err)213 void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
214 {
215 struct smb2_hdr *rsp_hdr;
216
217 if (work->next_smb2_rcv_hdr_off)
218 rsp_hdr = ksmbd_resp_buf_next(work);
219 else
220 rsp_hdr = smb2_get_msg(work->response_buf);
221 rsp_hdr->Status = err;
222 smb2_set_err_rsp(work);
223 }
224
225 /**
226 * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
227 * @work: smb work containing smb request buffer
228 *
229 * smb2 negotiate response is sent in reply of smb1 negotiate command for
230 * dialect auto-negotiation.
231 */
init_smb2_neg_rsp(struct ksmbd_work * work)232 int init_smb2_neg_rsp(struct ksmbd_work *work)
233 {
234 struct smb2_hdr *rsp_hdr;
235 struct smb2_negotiate_rsp *rsp;
236 struct ksmbd_conn *conn = work->conn;
237
238 if (conn->need_neg == false)
239 return -EINVAL;
240
241 *(__be32 *)work->response_buf =
242 cpu_to_be32(conn->vals->header_size);
243
244 rsp_hdr = smb2_get_msg(work->response_buf);
245 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
246 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
247 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
248 rsp_hdr->CreditRequest = cpu_to_le16(2);
249 rsp_hdr->Command = SMB2_NEGOTIATE;
250 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
251 rsp_hdr->NextCommand = 0;
252 rsp_hdr->MessageId = 0;
253 rsp_hdr->Id.SyncId.ProcessId = 0;
254 rsp_hdr->Id.SyncId.TreeId = 0;
255 rsp_hdr->SessionId = 0;
256 memset(rsp_hdr->Signature, 0, 16);
257
258 rsp = smb2_get_msg(work->response_buf);
259
260 WARN_ON(ksmbd_conn_good(work));
261
262 rsp->StructureSize = cpu_to_le16(65);
263 ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
264 rsp->DialectRevision = cpu_to_le16(conn->dialect);
265 /* Not setting conn guid rsp->ServerGUID, as it
266 * not used by client for identifying connection
267 */
268 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
269 /* Default Max Message Size till SMB2.0, 64K*/
270 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
271 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
272 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
273
274 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
275 rsp->ServerStartTime = 0;
276
277 rsp->SecurityBufferOffset = cpu_to_le16(128);
278 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
279 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
280 le16_to_cpu(rsp->SecurityBufferOffset));
281 inc_rfc1001_len(work->response_buf,
282 sizeof(struct smb2_negotiate_rsp) -
283 sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
284 AUTH_GSS_LENGTH);
285 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
286 if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
287 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
288 conn->use_spnego = true;
289
290 ksmbd_conn_set_need_negotiate(work);
291 return 0;
292 }
293
294 /**
295 * smb2_set_rsp_credits() - set number of credits in response buffer
296 * @work: smb work containing smb response buffer
297 */
smb2_set_rsp_credits(struct ksmbd_work * work)298 int smb2_set_rsp_credits(struct ksmbd_work *work)
299 {
300 struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
301 struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
302 struct ksmbd_conn *conn = work->conn;
303 unsigned short credits_requested, aux_max;
304 unsigned short credit_charge, credits_granted = 0;
305
306 if (work->send_no_response)
307 return 0;
308
309 hdr->CreditCharge = req_hdr->CreditCharge;
310
311 if (conn->total_credits > conn->vals->max_credits) {
312 hdr->CreditRequest = 0;
313 pr_err("Total credits overflow: %d\n", conn->total_credits);
314 return -EINVAL;
315 }
316
317 credit_charge = max_t(unsigned short,
318 le16_to_cpu(req_hdr->CreditCharge), 1);
319 if (credit_charge > conn->total_credits) {
320 ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
321 credit_charge, conn->total_credits);
322 return -EINVAL;
323 }
324
325 conn->total_credits -= credit_charge;
326 conn->outstanding_credits -= credit_charge;
327 credits_requested = max_t(unsigned short,
328 le16_to_cpu(req_hdr->CreditRequest), 1);
329
330 /* according to smb2.credits smbtorture, Windows server
331 * 2016 or later grant up to 8192 credits at once.
332 *
333 * TODO: Need to adjuct CreditRequest value according to
334 * current cpu load
335 */
336 if (hdr->Command == SMB2_NEGOTIATE)
337 aux_max = 1;
338 else
339 aux_max = conn->vals->max_credits - credit_charge;
340 credits_granted = min_t(unsigned short, credits_requested, aux_max);
341
342 if (conn->vals->max_credits - conn->total_credits < credits_granted)
343 credits_granted = conn->vals->max_credits -
344 conn->total_credits;
345
346 conn->total_credits += credits_granted;
347 work->credits_granted += credits_granted;
348
349 if (!req_hdr->NextCommand) {
350 /* Update CreditRequest in last request */
351 hdr->CreditRequest = cpu_to_le16(work->credits_granted);
352 }
353 ksmbd_debug(SMB,
354 "credits: requested[%d] granted[%d] total_granted[%d]\n",
355 credits_requested, credits_granted,
356 conn->total_credits);
357 return 0;
358 }
359
360 /**
361 * init_chained_smb2_rsp() - initialize smb2 chained response
362 * @work: smb work containing smb response buffer
363 */
init_chained_smb2_rsp(struct ksmbd_work * work)364 static void init_chained_smb2_rsp(struct ksmbd_work *work)
365 {
366 struct smb2_hdr *req = ksmbd_req_buf_next(work);
367 struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
368 struct smb2_hdr *rsp_hdr;
369 struct smb2_hdr *rcv_hdr;
370 int next_hdr_offset = 0;
371 int len, new_len;
372
373 /* Len of this response = updated RFC len - offset of previous cmd
374 * in the compound rsp
375 */
376
377 /* Storing the current local FID which may be needed by subsequent
378 * command in the compound request
379 */
380 if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
381 work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
382 work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
383 work->compound_sid = le64_to_cpu(rsp->SessionId);
384 }
385
386 len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
387 next_hdr_offset = le32_to_cpu(req->NextCommand);
388
389 new_len = ALIGN(len, 8);
390 inc_rfc1001_len(work->response_buf,
391 sizeof(struct smb2_hdr) + new_len - len);
392 rsp->NextCommand = cpu_to_le32(new_len);
393
394 work->next_smb2_rcv_hdr_off += next_hdr_offset;
395 work->next_smb2_rsp_hdr_off += new_len;
396 ksmbd_debug(SMB,
397 "Compound req new_len = %d rcv off = %d rsp off = %d\n",
398 new_len, work->next_smb2_rcv_hdr_off,
399 work->next_smb2_rsp_hdr_off);
400
401 rsp_hdr = ksmbd_resp_buf_next(work);
402 rcv_hdr = ksmbd_req_buf_next(work);
403
404 if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
405 ksmbd_debug(SMB, "related flag should be set\n");
406 work->compound_fid = KSMBD_NO_FID;
407 work->compound_pfid = KSMBD_NO_FID;
408 }
409 memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
410 rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
411 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
412 rsp_hdr->Command = rcv_hdr->Command;
413
414 /*
415 * Message is response. We don't grant oplock yet.
416 */
417 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
418 SMB2_FLAGS_RELATED_OPERATIONS);
419 rsp_hdr->NextCommand = 0;
420 rsp_hdr->MessageId = rcv_hdr->MessageId;
421 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
422 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
423 rsp_hdr->SessionId = rcv_hdr->SessionId;
424 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
425 }
426
427 /**
428 * is_chained_smb2_message() - check for chained command
429 * @work: smb work containing smb request buffer
430 *
431 * Return: true if chained request, otherwise false
432 */
is_chained_smb2_message(struct ksmbd_work * work)433 bool is_chained_smb2_message(struct ksmbd_work *work)
434 {
435 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
436 unsigned int len, next_cmd;
437
438 if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
439 return false;
440
441 hdr = ksmbd_req_buf_next(work);
442 next_cmd = le32_to_cpu(hdr->NextCommand);
443 if (next_cmd > 0) {
444 if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
445 __SMB2_HEADER_STRUCTURE_SIZE >
446 get_rfc1002_len(work->request_buf)) {
447 pr_err("next command(%u) offset exceeds smb msg size\n",
448 next_cmd);
449 return false;
450 }
451
452 if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
453 work->response_sz) {
454 pr_err("next response offset exceeds response buffer size\n");
455 return false;
456 }
457
458 ksmbd_debug(SMB, "got SMB2 chained command\n");
459 init_chained_smb2_rsp(work);
460 return true;
461 } else if (work->next_smb2_rcv_hdr_off) {
462 /*
463 * This is last request in chained command,
464 * align response to 8 byte
465 */
466 len = ALIGN(get_rfc1002_len(work->response_buf), 8);
467 len = len - get_rfc1002_len(work->response_buf);
468 if (len) {
469 ksmbd_debug(SMB, "padding len %u\n", len);
470 inc_rfc1001_len(work->response_buf, len);
471 if (work->aux_payload_sz)
472 work->aux_payload_sz += len;
473 }
474 }
475 return false;
476 }
477
478 /**
479 * init_smb2_rsp_hdr() - initialize smb2 response
480 * @work: smb work containing smb request buffer
481 *
482 * Return: 0
483 */
init_smb2_rsp_hdr(struct ksmbd_work * work)484 int init_smb2_rsp_hdr(struct ksmbd_work *work)
485 {
486 struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
487 struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
488 struct ksmbd_conn *conn = work->conn;
489
490 memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
491 *(__be32 *)work->response_buf =
492 cpu_to_be32(conn->vals->header_size);
493 rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
494 rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
495 rsp_hdr->Command = rcv_hdr->Command;
496
497 /*
498 * Message is response. We don't grant oplock yet.
499 */
500 rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
501 rsp_hdr->NextCommand = 0;
502 rsp_hdr->MessageId = rcv_hdr->MessageId;
503 rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
504 rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
505 rsp_hdr->SessionId = rcv_hdr->SessionId;
506 memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
507
508 work->syncronous = true;
509 if (work->async_id) {
510 ksmbd_release_id(&conn->async_ida, work->async_id);
511 work->async_id = 0;
512 }
513
514 return 0;
515 }
516
517 /**
518 * smb2_allocate_rsp_buf() - allocate smb2 response buffer
519 * @work: smb work containing smb request buffer
520 *
521 * Return: 0 on success, otherwise -ENOMEM
522 */
smb2_allocate_rsp_buf(struct ksmbd_work * work)523 int smb2_allocate_rsp_buf(struct ksmbd_work *work)
524 {
525 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
526 size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
527 size_t large_sz = small_sz + work->conn->vals->max_trans_size;
528 size_t sz = small_sz;
529 int cmd = le16_to_cpu(hdr->Command);
530
531 if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
532 sz = large_sz;
533
534 if (cmd == SMB2_QUERY_INFO_HE) {
535 struct smb2_query_info_req *req;
536
537 req = smb2_get_msg(work->request_buf);
538 if ((req->InfoType == SMB2_O_INFO_FILE &&
539 (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
540 req->FileInfoClass == FILE_ALL_INFORMATION)) ||
541 req->InfoType == SMB2_O_INFO_SECURITY)
542 sz = large_sz;
543 }
544
545 /* allocate large response buf for chained commands */
546 if (le32_to_cpu(hdr->NextCommand) > 0)
547 sz = large_sz;
548
549 work->response_buf = kvmalloc(sz, GFP_KERNEL | __GFP_ZERO);
550 if (!work->response_buf)
551 return -ENOMEM;
552
553 work->response_sz = sz;
554 return 0;
555 }
556
557 /**
558 * smb2_check_user_session() - check for valid session for a user
559 * @work: smb work containing smb request buffer
560 *
561 * Return: 0 on success, otherwise error
562 */
smb2_check_user_session(struct ksmbd_work * work)563 int smb2_check_user_session(struct ksmbd_work *work)
564 {
565 struct smb2_hdr *req_hdr = smb2_get_msg(work->request_buf);
566 struct ksmbd_conn *conn = work->conn;
567 unsigned int cmd = conn->ops->get_cmd_val(work);
568 unsigned long long sess_id;
569
570 work->sess = NULL;
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(work))
581 return -EINVAL;
582
583 sess_id = le64_to_cpu(req_hdr->SessionId);
584 /* Check for validity of user session */
585 work->sess = ksmbd_session_lookup_all(conn, sess_id);
586 if (work->sess)
587 return 1;
588 ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
589 return -EINVAL;
590 }
591
destroy_previous_session(struct ksmbd_conn * conn,struct ksmbd_user * user,u64 id)592 static void destroy_previous_session(struct ksmbd_conn *conn,
593 struct ksmbd_user *user, u64 id)
594 {
595 struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
596 struct ksmbd_user *prev_user;
597 struct channel *chann;
598
599 if (!prev_sess)
600 return;
601
602 prev_user = prev_sess->user;
603
604 if (!prev_user ||
605 strcmp(user->name, prev_user->name) ||
606 user->passkey_sz != prev_user->passkey_sz ||
607 memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
608 return;
609
610 prev_sess->state = SMB2_SESSION_EXPIRED;
611 write_lock(&prev_sess->chann_lock);
612 list_for_each_entry(chann, &prev_sess->ksmbd_chann_list, chann_list)
613 chann->conn->status = KSMBD_SESS_EXITING;
614 write_unlock(&prev_sess->chann_lock);
615 }
616
617 /**
618 * smb2_get_name() - get filename string from on the wire smb format
619 * @src: source buffer
620 * @maxlen: maxlen of source string
621 * @local_nls: nls_table pointer
622 *
623 * Return: matching converted filename on success, otherwise error ptr
624 */
625 static char *
smb2_get_name(const char * src,const int maxlen,struct nls_table * local_nls)626 smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
627 {
628 char *name;
629
630 name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
631 if (IS_ERR(name)) {
632 pr_err("failed to get name %ld\n", PTR_ERR(name));
633 return name;
634 }
635
636 ksmbd_conv_path_to_unix(name);
637 ksmbd_strip_last_slash(name);
638 return name;
639 }
640
setup_async_work(struct ksmbd_work * work,void (* fn)(void **),void ** arg)641 int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
642 {
643 struct smb2_hdr *rsp_hdr;
644 struct ksmbd_conn *conn = work->conn;
645 int id;
646
647 rsp_hdr = smb2_get_msg(work->response_buf);
648 rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
649
650 id = ksmbd_acquire_async_msg_id(&conn->async_ida);
651 if (id < 0) {
652 pr_err("Failed to alloc async message id\n");
653 return id;
654 }
655 work->syncronous = false;
656 work->async_id = id;
657 rsp_hdr->Id.AsyncId = cpu_to_le64(id);
658
659 ksmbd_debug(SMB,
660 "Send interim Response to inform async request id : %d\n",
661 work->async_id);
662
663 work->cancel_fn = fn;
664 work->cancel_argv = arg;
665
666 if (list_empty(&work->async_request_entry)) {
667 spin_lock(&conn->request_lock);
668 list_add_tail(&work->async_request_entry, &conn->async_requests);
669 spin_unlock(&conn->request_lock);
670 }
671
672 return 0;
673 }
674
smb2_send_interim_resp(struct ksmbd_work * work,__le32 status)675 void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
676 {
677 struct smb2_hdr *rsp_hdr;
678
679 rsp_hdr = smb2_get_msg(work->response_buf);
680 smb2_set_err_rsp(work);
681 rsp_hdr->Status = status;
682
683 work->multiRsp = 1;
684 ksmbd_conn_write(work);
685 rsp_hdr->Status = 0;
686 work->multiRsp = 0;
687 }
688
smb2_get_reparse_tag_special_file(umode_t mode)689 static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
690 {
691 if (S_ISDIR(mode) || S_ISREG(mode))
692 return 0;
693
694 if (S_ISLNK(mode))
695 return IO_REPARSE_TAG_LX_SYMLINK_LE;
696 else if (S_ISFIFO(mode))
697 return IO_REPARSE_TAG_LX_FIFO_LE;
698 else if (S_ISSOCK(mode))
699 return IO_REPARSE_TAG_AF_UNIX_LE;
700 else if (S_ISCHR(mode))
701 return IO_REPARSE_TAG_LX_CHR_LE;
702 else if (S_ISBLK(mode))
703 return IO_REPARSE_TAG_LX_BLK_LE;
704
705 return 0;
706 }
707
708 /**
709 * smb2_get_dos_mode() - get file mode in dos format from unix mode
710 * @stat: kstat containing file mode
711 * @attribute: attribute flags
712 *
713 * Return: converted dos mode
714 */
smb2_get_dos_mode(struct kstat * stat,int attribute)715 static int smb2_get_dos_mode(struct kstat *stat, int attribute)
716 {
717 int attr = 0;
718
719 if (S_ISDIR(stat->mode)) {
720 attr = FILE_ATTRIBUTE_DIRECTORY |
721 (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
722 } else {
723 attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
724 attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
725 if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
726 FILE_SUPPORTS_SPARSE_FILES))
727 attr |= FILE_ATTRIBUTE_SPARSE_FILE;
728
729 if (smb2_get_reparse_tag_special_file(stat->mode))
730 attr |= FILE_ATTRIBUTE_REPARSE_POINT;
731 }
732
733 return attr;
734 }
735
build_preauth_ctxt(struct smb2_preauth_neg_context * pneg_ctxt,__le16 hash_id)736 static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
737 __le16 hash_id)
738 {
739 pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
740 pneg_ctxt->DataLength = cpu_to_le16(38);
741 pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
742 pneg_ctxt->Reserved = cpu_to_le32(0);
743 pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
744 get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
745 pneg_ctxt->HashAlgorithms = hash_id;
746 }
747
build_encrypt_ctxt(struct smb2_encryption_neg_context * pneg_ctxt,__le16 cipher_type)748 static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
749 __le16 cipher_type)
750 {
751 pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
752 pneg_ctxt->DataLength = cpu_to_le16(4);
753 pneg_ctxt->Reserved = cpu_to_le32(0);
754 pneg_ctxt->CipherCount = cpu_to_le16(1);
755 pneg_ctxt->Ciphers[0] = cipher_type;
756 }
757
build_compression_ctxt(struct smb2_compression_capabilities_context * pneg_ctxt,__le16 comp_algo)758 static void build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt,
759 __le16 comp_algo)
760 {
761 pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
762 pneg_ctxt->DataLength =
763 cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
764 - sizeof(struct smb2_neg_context));
765 pneg_ctxt->Reserved = cpu_to_le32(0);
766 pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(1);
767 pneg_ctxt->Flags = cpu_to_le32(0);
768 pneg_ctxt->CompressionAlgorithms[0] = comp_algo;
769 }
770
build_sign_cap_ctxt(struct smb2_signing_capabilities * pneg_ctxt,__le16 sign_algo)771 static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
772 __le16 sign_algo)
773 {
774 pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
775 pneg_ctxt->DataLength =
776 cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
777 - sizeof(struct smb2_neg_context));
778 pneg_ctxt->Reserved = cpu_to_le32(0);
779 pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
780 pneg_ctxt->SigningAlgorithms[0] = sign_algo;
781 }
782
build_posix_ctxt(struct smb2_posix_neg_context * pneg_ctxt)783 static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
784 {
785 pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
786 pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
787 /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
788 pneg_ctxt->Name[0] = 0x93;
789 pneg_ctxt->Name[1] = 0xAD;
790 pneg_ctxt->Name[2] = 0x25;
791 pneg_ctxt->Name[3] = 0x50;
792 pneg_ctxt->Name[4] = 0x9C;
793 pneg_ctxt->Name[5] = 0xB4;
794 pneg_ctxt->Name[6] = 0x11;
795 pneg_ctxt->Name[7] = 0xE7;
796 pneg_ctxt->Name[8] = 0xB4;
797 pneg_ctxt->Name[9] = 0x23;
798 pneg_ctxt->Name[10] = 0x83;
799 pneg_ctxt->Name[11] = 0xDE;
800 pneg_ctxt->Name[12] = 0x96;
801 pneg_ctxt->Name[13] = 0x8B;
802 pneg_ctxt->Name[14] = 0xCD;
803 pneg_ctxt->Name[15] = 0x7C;
804 }
805
assemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_rsp * rsp,void * smb2_buf_len)806 static void assemble_neg_contexts(struct ksmbd_conn *conn,
807 struct smb2_negotiate_rsp *rsp,
808 void *smb2_buf_len)
809 {
810 char *pneg_ctxt = (char *)rsp +
811 le32_to_cpu(rsp->NegotiateContextOffset);
812 int neg_ctxt_cnt = 1;
813 int ctxt_size;
814
815 ksmbd_debug(SMB,
816 "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
817 build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
818 conn->preauth_info->Preauth_HashId);
819 rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
820 inc_rfc1001_len(smb2_buf_len, AUTH_GSS_PADDING);
821 ctxt_size = sizeof(struct smb2_preauth_neg_context);
822 /* Round to 8 byte boundary */
823 pneg_ctxt += round_up(sizeof(struct smb2_preauth_neg_context), 8);
824
825 if (conn->cipher_type) {
826 ctxt_size = round_up(ctxt_size, 8);
827 ksmbd_debug(SMB,
828 "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
829 build_encrypt_ctxt((struct smb2_encryption_neg_context *)pneg_ctxt,
830 conn->cipher_type);
831 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
832 ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
833 /* Round to 8 byte boundary */
834 pneg_ctxt +=
835 round_up(sizeof(struct smb2_encryption_neg_context) + 2,
836 8);
837 }
838
839 if (conn->compress_algorithm) {
840 ctxt_size = round_up(ctxt_size, 8);
841 ksmbd_debug(SMB,
842 "assemble SMB2_COMPRESSION_CAPABILITIES context\n");
843 /* Temporarily set to SMB3_COMPRESS_NONE */
844 build_compression_ctxt((struct smb2_compression_capabilities_context *)pneg_ctxt,
845 conn->compress_algorithm);
846 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
847 ctxt_size += sizeof(struct smb2_compression_capabilities_context) + 2;
848 /* Round to 8 byte boundary */
849 pneg_ctxt += round_up(sizeof(struct smb2_compression_capabilities_context) + 2,
850 8);
851 }
852
853 if (conn->posix_ext_supported) {
854 ctxt_size = round_up(ctxt_size, 8);
855 ksmbd_debug(SMB,
856 "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
857 build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
858 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
859 ctxt_size += sizeof(struct smb2_posix_neg_context);
860 /* Round to 8 byte boundary */
861 pneg_ctxt += round_up(sizeof(struct smb2_posix_neg_context), 8);
862 }
863
864 if (conn->signing_negotiated) {
865 ctxt_size = round_up(ctxt_size, 8);
866 ksmbd_debug(SMB,
867 "assemble SMB2_SIGNING_CAPABILITIES context\n");
868 build_sign_cap_ctxt((struct smb2_signing_capabilities *)pneg_ctxt,
869 conn->signing_algorithm);
870 rsp->NegotiateContextCount = cpu_to_le16(++neg_ctxt_cnt);
871 ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
872 }
873
874 inc_rfc1001_len(smb2_buf_len, ctxt_size);
875 }
876
decode_preauth_ctxt(struct ksmbd_conn * conn,struct smb2_preauth_neg_context * pneg_ctxt)877 static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
878 struct smb2_preauth_neg_context *pneg_ctxt)
879 {
880 __le32 err = STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
881
882 if (pneg_ctxt->HashAlgorithms == SMB2_PREAUTH_INTEGRITY_SHA512) {
883 conn->preauth_info->Preauth_HashId =
884 SMB2_PREAUTH_INTEGRITY_SHA512;
885 err = STATUS_SUCCESS;
886 }
887
888 return err;
889 }
890
decode_encrypt_ctxt(struct ksmbd_conn * conn,struct smb2_encryption_neg_context * pneg_ctxt,int len_of_ctxts)891 static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
892 struct smb2_encryption_neg_context *pneg_ctxt,
893 int len_of_ctxts)
894 {
895 int cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
896 int i, cphs_size = cph_cnt * sizeof(__le16);
897
898 conn->cipher_type = 0;
899
900 if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
901 len_of_ctxts) {
902 pr_err("Invalid cipher count(%d)\n", cph_cnt);
903 return;
904 }
905
906 if (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION))
907 return;
908
909 for (i = 0; i < cph_cnt; i++) {
910 if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
911 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
912 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
913 pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
914 ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
915 pneg_ctxt->Ciphers[i]);
916 conn->cipher_type = pneg_ctxt->Ciphers[i];
917 break;
918 }
919 }
920 }
921
922 /**
923 * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
924 * @conn: smb connection
925 *
926 * Return: true if connection should be encrypted, else false
927 */
smb3_encryption_negotiated(struct ksmbd_conn * conn)928 bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
929 {
930 if (!conn->ops->generate_encryptionkey)
931 return false;
932
933 /*
934 * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
935 * SMB 3.1.1 uses the cipher_type field.
936 */
937 return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
938 conn->cipher_type;
939 }
940
decode_compress_ctxt(struct ksmbd_conn * conn,struct smb2_compression_capabilities_context * pneg_ctxt)941 static void decode_compress_ctxt(struct ksmbd_conn *conn,
942 struct smb2_compression_capabilities_context *pneg_ctxt)
943 {
944 conn->compress_algorithm = SMB3_COMPRESS_NONE;
945 }
946
decode_sign_cap_ctxt(struct ksmbd_conn * conn,struct smb2_signing_capabilities * pneg_ctxt,int len_of_ctxts)947 static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
948 struct smb2_signing_capabilities *pneg_ctxt,
949 int len_of_ctxts)
950 {
951 int sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
952 int i, sign_alos_size = sign_algo_cnt * sizeof(__le16);
953
954 conn->signing_negotiated = false;
955
956 if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
957 len_of_ctxts) {
958 pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
959 return;
960 }
961
962 for (i = 0; i < sign_algo_cnt; i++) {
963 if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
964 pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
965 ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
966 pneg_ctxt->SigningAlgorithms[i]);
967 conn->signing_negotiated = true;
968 conn->signing_algorithm =
969 pneg_ctxt->SigningAlgorithms[i];
970 break;
971 }
972 }
973 }
974
deassemble_neg_contexts(struct ksmbd_conn * conn,struct smb2_negotiate_req * req,int len_of_smb)975 static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
976 struct smb2_negotiate_req *req,
977 int len_of_smb)
978 {
979 /* +4 is to account for the RFC1001 len field */
980 struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
981 int i = 0, len_of_ctxts;
982 int offset = le32_to_cpu(req->NegotiateContextOffset);
983 int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
984 __le32 status = STATUS_INVALID_PARAMETER;
985
986 ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
987 if (len_of_smb <= offset) {
988 ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
989 return status;
990 }
991
992 len_of_ctxts = len_of_smb - offset;
993
994 while (i++ < neg_ctxt_cnt) {
995 int clen;
996
997 /* check that offset is not beyond end of SMB */
998 if (len_of_ctxts == 0)
999 break;
1000
1001 if (len_of_ctxts < sizeof(struct smb2_neg_context))
1002 break;
1003
1004 pctx = (struct smb2_neg_context *)((char *)pctx + offset);
1005 clen = le16_to_cpu(pctx->DataLength);
1006 if (clen + sizeof(struct smb2_neg_context) > len_of_ctxts)
1007 break;
1008
1009 if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
1010 ksmbd_debug(SMB,
1011 "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
1012 if (conn->preauth_info->Preauth_HashId)
1013 break;
1014
1015 status = decode_preauth_ctxt(conn,
1016 (struct smb2_preauth_neg_context *)pctx);
1017 if (status != STATUS_SUCCESS)
1018 break;
1019 } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
1020 ksmbd_debug(SMB,
1021 "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
1022 if (conn->cipher_type)
1023 break;
1024
1025 decode_encrypt_ctxt(conn,
1026 (struct smb2_encryption_neg_context *)pctx,
1027 len_of_ctxts);
1028 } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
1029 ksmbd_debug(SMB,
1030 "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
1031 if (conn->compress_algorithm)
1032 break;
1033
1034 decode_compress_ctxt(conn,
1035 (struct smb2_compression_capabilities_context *)pctx);
1036 } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
1037 ksmbd_debug(SMB,
1038 "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
1039 } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
1040 ksmbd_debug(SMB,
1041 "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
1042 conn->posix_ext_supported = true;
1043 } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
1044 ksmbd_debug(SMB,
1045 "deassemble SMB2_SIGNING_CAPABILITIES context\n");
1046 decode_sign_cap_ctxt(conn,
1047 (struct smb2_signing_capabilities *)pctx,
1048 len_of_ctxts);
1049 }
1050
1051 /* offsets must be 8 byte aligned */
1052 clen = (clen + 7) & ~0x7;
1053 offset = clen + sizeof(struct smb2_neg_context);
1054 len_of_ctxts -= clen + sizeof(struct smb2_neg_context);
1055 }
1056 return status;
1057 }
1058
1059 /**
1060 * smb2_handle_negotiate() - handler for smb2 negotiate command
1061 * @work: smb work containing smb request buffer
1062 *
1063 * Return: 0
1064 */
smb2_handle_negotiate(struct ksmbd_work * work)1065 int smb2_handle_negotiate(struct ksmbd_work *work)
1066 {
1067 struct ksmbd_conn *conn = work->conn;
1068 struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
1069 struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
1070 int rc = 0;
1071 unsigned int smb2_buf_len, smb2_neg_size;
1072 __le32 status;
1073
1074 ksmbd_debug(SMB, "Received negotiate request\n");
1075 conn->need_neg = false;
1076 if (ksmbd_conn_good(work)) {
1077 pr_err("conn->tcp_status is already in CifsGood State\n");
1078 work->send_no_response = 1;
1079 return rc;
1080 }
1081
1082 if (req->DialectCount == 0) {
1083 pr_err("malformed packet\n");
1084 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1085 rc = -EINVAL;
1086 goto err_out;
1087 }
1088
1089 smb2_buf_len = get_rfc1002_len(work->request_buf);
1090 smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
1091 if (smb2_neg_size > smb2_buf_len) {
1092 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1093 rc = -EINVAL;
1094 goto err_out;
1095 }
1096
1097 if (conn->dialect == SMB311_PROT_ID) {
1098 unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
1099
1100 if (smb2_buf_len < nego_ctxt_off) {
1101 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1102 rc = -EINVAL;
1103 goto err_out;
1104 }
1105
1106 if (smb2_neg_size > nego_ctxt_off) {
1107 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1108 rc = -EINVAL;
1109 goto err_out;
1110 }
1111
1112 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1113 nego_ctxt_off) {
1114 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1115 rc = -EINVAL;
1116 goto err_out;
1117 }
1118 } else {
1119 if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
1120 smb2_buf_len) {
1121 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1122 rc = -EINVAL;
1123 goto err_out;
1124 }
1125 }
1126
1127 conn->cli_cap = le32_to_cpu(req->Capabilities);
1128 switch (conn->dialect) {
1129 case SMB311_PROT_ID:
1130 conn->preauth_info =
1131 kzalloc(sizeof(struct preauth_integrity_info),
1132 GFP_KERNEL);
1133 if (!conn->preauth_info) {
1134 rc = -ENOMEM;
1135 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1136 goto err_out;
1137 }
1138
1139 status = deassemble_neg_contexts(conn, req,
1140 get_rfc1002_len(work->request_buf));
1141 if (status != STATUS_SUCCESS) {
1142 pr_err("deassemble_neg_contexts error(0x%x)\n",
1143 status);
1144 rsp->hdr.Status = status;
1145 rc = -EINVAL;
1146 kfree(conn->preauth_info);
1147 conn->preauth_info = NULL;
1148 goto err_out;
1149 }
1150
1151 rc = init_smb3_11_server(conn);
1152 if (rc < 0) {
1153 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1154 kfree(conn->preauth_info);
1155 conn->preauth_info = NULL;
1156 goto err_out;
1157 }
1158
1159 ksmbd_gen_preauth_integrity_hash(conn,
1160 work->request_buf,
1161 conn->preauth_info->Preauth_HashValue);
1162 rsp->NegotiateContextOffset =
1163 cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
1164 assemble_neg_contexts(conn, rsp, work->response_buf);
1165 break;
1166 case SMB302_PROT_ID:
1167 init_smb3_02_server(conn);
1168 break;
1169 case SMB30_PROT_ID:
1170 init_smb3_0_server(conn);
1171 break;
1172 case SMB21_PROT_ID:
1173 init_smb2_1_server(conn);
1174 break;
1175 case SMB2X_PROT_ID:
1176 case BAD_PROT_ID:
1177 default:
1178 ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
1179 conn->dialect);
1180 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
1181 rc = -EINVAL;
1182 goto err_out;
1183 }
1184 rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
1185
1186 /* For stats */
1187 conn->connection_type = conn->dialect;
1188
1189 rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
1190 rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
1191 rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
1192
1193 memcpy(conn->ClientGUID, req->ClientGUID,
1194 SMB2_CLIENT_GUID_SIZE);
1195 conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
1196
1197 rsp->StructureSize = cpu_to_le16(65);
1198 rsp->DialectRevision = cpu_to_le16(conn->dialect);
1199 /* Not setting conn guid rsp->ServerGUID, as it
1200 * not used by client for identifying server
1201 */
1202 memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
1203
1204 rsp->SystemTime = cpu_to_le64(ksmbd_systime());
1205 rsp->ServerStartTime = 0;
1206 ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
1207 le32_to_cpu(rsp->NegotiateContextOffset),
1208 le16_to_cpu(rsp->NegotiateContextCount));
1209
1210 rsp->SecurityBufferOffset = cpu_to_le16(128);
1211 rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
1212 ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
1213 le16_to_cpu(rsp->SecurityBufferOffset));
1214 inc_rfc1001_len(work->response_buf, sizeof(struct smb2_negotiate_rsp) -
1215 sizeof(struct smb2_hdr) - sizeof(rsp->Buffer) +
1216 AUTH_GSS_LENGTH);
1217 rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
1218 conn->use_spnego = true;
1219
1220 if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
1221 server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
1222 req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
1223 conn->sign = true;
1224 else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
1225 server_conf.enforced_signing = true;
1226 rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
1227 conn->sign = true;
1228 }
1229
1230 conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
1231 ksmbd_conn_set_need_negotiate(work);
1232
1233 err_out:
1234 if (rc < 0)
1235 smb2_set_err_rsp(work);
1236
1237 return rc;
1238 }
1239
alloc_preauth_hash(struct ksmbd_session * sess,struct ksmbd_conn * conn)1240 static int alloc_preauth_hash(struct ksmbd_session *sess,
1241 struct ksmbd_conn *conn)
1242 {
1243 if (sess->Preauth_HashValue)
1244 return 0;
1245
1246 sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
1247 PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
1248 if (!sess->Preauth_HashValue)
1249 return -ENOMEM;
1250
1251 return 0;
1252 }
1253
generate_preauth_hash(struct ksmbd_work * work)1254 static int generate_preauth_hash(struct ksmbd_work *work)
1255 {
1256 struct ksmbd_conn *conn = work->conn;
1257 struct ksmbd_session *sess = work->sess;
1258 u8 *preauth_hash;
1259
1260 if (conn->dialect != SMB311_PROT_ID)
1261 return 0;
1262
1263 if (conn->binding) {
1264 struct preauth_session *preauth_sess;
1265
1266 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
1267 if (!preauth_sess) {
1268 preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
1269 if (!preauth_sess)
1270 return -ENOMEM;
1271 }
1272
1273 preauth_hash = preauth_sess->Preauth_HashValue;
1274 } else {
1275 if (!sess->Preauth_HashValue)
1276 if (alloc_preauth_hash(sess, conn))
1277 return -ENOMEM;
1278 preauth_hash = sess->Preauth_HashValue;
1279 }
1280
1281 ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
1282 return 0;
1283 }
1284
decode_negotiation_token(struct ksmbd_conn * conn,struct negotiate_message * negblob,size_t sz)1285 static int decode_negotiation_token(struct ksmbd_conn *conn,
1286 struct negotiate_message *negblob,
1287 size_t sz)
1288 {
1289 if (!conn->use_spnego)
1290 return -EINVAL;
1291
1292 if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
1293 if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
1294 conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
1295 conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
1296 conn->use_spnego = false;
1297 }
1298 }
1299 return 0;
1300 }
1301
ntlm_negotiate(struct ksmbd_work * work,struct negotiate_message * negblob,size_t negblob_len)1302 static int ntlm_negotiate(struct ksmbd_work *work,
1303 struct negotiate_message *negblob,
1304 size_t negblob_len)
1305 {
1306 struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1307 struct challenge_message *chgblob;
1308 unsigned char *spnego_blob = NULL;
1309 u16 spnego_blob_len;
1310 char *neg_blob;
1311 int sz, rc;
1312
1313 ksmbd_debug(SMB, "negotiate phase\n");
1314 rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
1315 if (rc)
1316 return rc;
1317
1318 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1319 chgblob =
1320 (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
1321 memset(chgblob, 0, sizeof(struct challenge_message));
1322
1323 if (!work->conn->use_spnego) {
1324 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1325 if (sz < 0)
1326 return -ENOMEM;
1327
1328 rsp->SecurityBufferLength = cpu_to_le16(sz);
1329 return 0;
1330 }
1331
1332 sz = sizeof(struct challenge_message);
1333 sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
1334
1335 neg_blob = kzalloc(sz, GFP_KERNEL);
1336 if (!neg_blob)
1337 return -ENOMEM;
1338
1339 chgblob = (struct challenge_message *)neg_blob;
1340 sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
1341 if (sz < 0) {
1342 rc = -ENOMEM;
1343 goto out;
1344 }
1345
1346 rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
1347 neg_blob, sz);
1348 if (rc) {
1349 rc = -ENOMEM;
1350 goto out;
1351 }
1352
1353 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1354 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1355 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1356
1357 out:
1358 kfree(spnego_blob);
1359 kfree(neg_blob);
1360 return rc;
1361 }
1362
user_authblob(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1363 static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
1364 struct smb2_sess_setup_req *req)
1365 {
1366 int sz;
1367
1368 if (conn->use_spnego && conn->mechToken)
1369 return (struct authenticate_message *)conn->mechToken;
1370
1371 sz = le16_to_cpu(req->SecurityBufferOffset);
1372 return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
1373 + sz);
1374 }
1375
session_user(struct ksmbd_conn * conn,struct smb2_sess_setup_req * req)1376 static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
1377 struct smb2_sess_setup_req *req)
1378 {
1379 struct authenticate_message *authblob;
1380 struct ksmbd_user *user;
1381 char *name;
1382 unsigned int auth_msg_len, name_off, name_len, secbuf_len;
1383
1384 secbuf_len = le16_to_cpu(req->SecurityBufferLength);
1385 if (secbuf_len < sizeof(struct authenticate_message)) {
1386 ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
1387 return NULL;
1388 }
1389 authblob = user_authblob(conn, req);
1390 name_off = le32_to_cpu(authblob->UserName.BufferOffset);
1391 name_len = le16_to_cpu(authblob->UserName.Length);
1392 auth_msg_len = le16_to_cpu(req->SecurityBufferOffset) + secbuf_len;
1393
1394 if (auth_msg_len < (u64)name_off + name_len)
1395 return NULL;
1396
1397 name = smb_strndup_from_utf16((const char *)authblob + name_off,
1398 name_len,
1399 true,
1400 conn->local_nls);
1401 if (IS_ERR(name)) {
1402 pr_err("cannot allocate memory\n");
1403 return NULL;
1404 }
1405
1406 ksmbd_debug(SMB, "session setup request for user %s\n", name);
1407 user = ksmbd_login_user(name);
1408 kfree(name);
1409 return user;
1410 }
1411
ntlm_authenticate(struct ksmbd_work * work)1412 static int ntlm_authenticate(struct ksmbd_work *work)
1413 {
1414 struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1415 struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1416 struct ksmbd_conn *conn = work->conn;
1417 struct ksmbd_session *sess = work->sess;
1418 struct channel *chann = NULL;
1419 struct ksmbd_user *user;
1420 u64 prev_id;
1421 int sz, rc;
1422
1423 ksmbd_debug(SMB, "authenticate phase\n");
1424 if (conn->use_spnego) {
1425 unsigned char *spnego_blob;
1426 u16 spnego_blob_len;
1427
1428 rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
1429 &spnego_blob_len,
1430 0);
1431 if (rc)
1432 return -ENOMEM;
1433
1434 sz = le16_to_cpu(rsp->SecurityBufferOffset);
1435 memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
1436 rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
1437 kfree(spnego_blob);
1438 inc_rfc1001_len(work->response_buf, spnego_blob_len - 1);
1439 }
1440
1441 user = session_user(conn, req);
1442 if (!user) {
1443 ksmbd_debug(SMB, "Unknown user name or an error\n");
1444 return -EPERM;
1445 }
1446
1447 /* Check for previous session */
1448 prev_id = le64_to_cpu(req->PreviousSessionId);
1449 if (prev_id && prev_id != sess->id)
1450 destroy_previous_session(conn, user, prev_id);
1451
1452 if (sess->state == SMB2_SESSION_VALID) {
1453 /*
1454 * Reuse session if anonymous try to connect
1455 * on reauthetication.
1456 */
1457 if (ksmbd_anonymous_user(user)) {
1458 ksmbd_free_user(user);
1459 return 0;
1460 }
1461
1462 if (!ksmbd_compare_user(sess->user, user)) {
1463 ksmbd_free_user(user);
1464 return -EPERM;
1465 }
1466 ksmbd_free_user(user);
1467 } else {
1468 sess->user = user;
1469 }
1470
1471 if (user_guest(sess->user)) {
1472 rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
1473 } else {
1474 struct authenticate_message *authblob;
1475
1476 authblob = user_authblob(conn, req);
1477 sz = le16_to_cpu(req->SecurityBufferLength);
1478 rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
1479 if (rc) {
1480 set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
1481 ksmbd_debug(SMB, "authentication failed\n");
1482 return -EPERM;
1483 }
1484 }
1485
1486 /*
1487 * If session state is SMB2_SESSION_VALID, We can assume
1488 * that it is reauthentication. And the user/password
1489 * has been verified, so return it here.
1490 */
1491 if (sess->state == SMB2_SESSION_VALID) {
1492 if (conn->binding)
1493 goto binding_session;
1494 return 0;
1495 }
1496
1497 if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
1498 (conn->sign || server_conf.enforced_signing)) ||
1499 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1500 sess->sign = true;
1501
1502 if (smb3_encryption_negotiated(conn) &&
1503 !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1504 rc = conn->ops->generate_encryptionkey(conn, sess);
1505 if (rc) {
1506 ksmbd_debug(SMB,
1507 "SMB3 encryption key generation failed\n");
1508 return -EINVAL;
1509 }
1510 sess->enc = true;
1511 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1512 /*
1513 * signing is disable if encryption is enable
1514 * on this session
1515 */
1516 sess->sign = false;
1517 }
1518
1519 binding_session:
1520 if (conn->dialect >= SMB30_PROT_ID) {
1521 read_lock(&sess->chann_lock);
1522 chann = lookup_chann_list(sess, conn);
1523 read_unlock(&sess->chann_lock);
1524 if (!chann) {
1525 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1526 if (!chann)
1527 return -ENOMEM;
1528
1529 chann->conn = conn;
1530 INIT_LIST_HEAD(&chann->chann_list);
1531 write_lock(&sess->chann_lock);
1532 list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1533 write_unlock(&sess->chann_lock);
1534 }
1535 }
1536
1537 if (conn->ops->generate_signingkey) {
1538 rc = conn->ops->generate_signingkey(sess, conn);
1539 if (rc) {
1540 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1541 return -EINVAL;
1542 }
1543 }
1544
1545 if (!ksmbd_conn_lookup_dialect(conn)) {
1546 pr_err("fail to verify the dialect\n");
1547 return -ENOENT;
1548 }
1549 return 0;
1550 }
1551
1552 #ifdef CONFIG_SMB_SERVER_KERBEROS5
krb5_authenticate(struct ksmbd_work * work)1553 static int krb5_authenticate(struct ksmbd_work *work)
1554 {
1555 struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1556 struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1557 struct ksmbd_conn *conn = work->conn;
1558 struct ksmbd_session *sess = work->sess;
1559 char *in_blob, *out_blob;
1560 struct channel *chann = NULL;
1561 u64 prev_sess_id;
1562 int in_len, out_len;
1563 int retval;
1564
1565 in_blob = (char *)&req->hdr.ProtocolId +
1566 le16_to_cpu(req->SecurityBufferOffset);
1567 in_len = le16_to_cpu(req->SecurityBufferLength);
1568 out_blob = (char *)&rsp->hdr.ProtocolId +
1569 le16_to_cpu(rsp->SecurityBufferOffset);
1570 out_len = work->response_sz -
1571 (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
1572
1573 /* Check previous session */
1574 prev_sess_id = le64_to_cpu(req->PreviousSessionId);
1575 if (prev_sess_id && prev_sess_id != sess->id)
1576 destroy_previous_session(conn, sess->user, prev_sess_id);
1577
1578 if (sess->state == SMB2_SESSION_VALID)
1579 ksmbd_free_user(sess->user);
1580
1581 retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
1582 out_blob, &out_len);
1583 if (retval) {
1584 ksmbd_debug(SMB, "krb5 authentication failed\n");
1585 return -EINVAL;
1586 }
1587 rsp->SecurityBufferLength = cpu_to_le16(out_len);
1588 inc_rfc1001_len(work->response_buf, out_len - 1);
1589
1590 if ((conn->sign || server_conf.enforced_signing) ||
1591 (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
1592 sess->sign = true;
1593
1594 if (smb3_encryption_negotiated(conn)) {
1595 retval = conn->ops->generate_encryptionkey(conn, sess);
1596 if (retval) {
1597 ksmbd_debug(SMB,
1598 "SMB3 encryption key generation failed\n");
1599 return -EINVAL;
1600 }
1601 sess->enc = true;
1602 rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
1603 sess->sign = false;
1604 }
1605
1606 if (conn->dialect >= SMB30_PROT_ID) {
1607 read_lock(&sess->chann_lock);
1608 chann = lookup_chann_list(sess, conn);
1609 read_unlock(&sess->chann_lock);
1610 if (!chann) {
1611 chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
1612 if (!chann)
1613 return -ENOMEM;
1614
1615 chann->conn = conn;
1616 INIT_LIST_HEAD(&chann->chann_list);
1617 write_lock(&sess->chann_lock);
1618 list_add(&chann->chann_list, &sess->ksmbd_chann_list);
1619 write_unlock(&sess->chann_lock);
1620 }
1621 }
1622
1623 if (conn->ops->generate_signingkey) {
1624 retval = conn->ops->generate_signingkey(sess, conn);
1625 if (retval) {
1626 ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
1627 return -EINVAL;
1628 }
1629 }
1630
1631 if (!ksmbd_conn_lookup_dialect(conn)) {
1632 pr_err("fail to verify the dialect\n");
1633 return -ENOENT;
1634 }
1635 return 0;
1636 }
1637 #else
krb5_authenticate(struct ksmbd_work * work)1638 static int krb5_authenticate(struct ksmbd_work *work)
1639 {
1640 return -EOPNOTSUPP;
1641 }
1642 #endif
1643
smb2_sess_setup(struct ksmbd_work * work)1644 int smb2_sess_setup(struct ksmbd_work *work)
1645 {
1646 struct ksmbd_conn *conn = work->conn;
1647 struct smb2_sess_setup_req *req = smb2_get_msg(work->request_buf);
1648 struct smb2_sess_setup_rsp *rsp = smb2_get_msg(work->response_buf);
1649 struct ksmbd_session *sess;
1650 struct negotiate_message *negblob;
1651 unsigned int negblob_len, negblob_off;
1652 int rc = 0;
1653
1654 ksmbd_debug(SMB, "Received request for session setup\n");
1655
1656 rsp->StructureSize = cpu_to_le16(9);
1657 rsp->SessionFlags = 0;
1658 rsp->SecurityBufferOffset = cpu_to_le16(72);
1659 rsp->SecurityBufferLength = 0;
1660 inc_rfc1001_len(work->response_buf, 9);
1661
1662 if (!req->hdr.SessionId) {
1663 sess = ksmbd_smb2_session_create();
1664 if (!sess) {
1665 rc = -ENOMEM;
1666 goto out_err;
1667 }
1668 rsp->hdr.SessionId = cpu_to_le64(sess->id);
1669 rc = ksmbd_session_register(conn, sess);
1670 if (rc)
1671 goto out_err;
1672 } else if (conn->dialect >= SMB30_PROT_ID &&
1673 (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1674 req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
1675 u64 sess_id = le64_to_cpu(req->hdr.SessionId);
1676
1677 sess = ksmbd_session_lookup_slowpath(sess_id);
1678 if (!sess) {
1679 rc = -ENOENT;
1680 goto out_err;
1681 }
1682
1683 if (conn->dialect != sess->dialect) {
1684 rc = -EINVAL;
1685 goto out_err;
1686 }
1687
1688 if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
1689 rc = -EINVAL;
1690 goto out_err;
1691 }
1692
1693 if (strncmp(conn->ClientGUID, sess->ClientGUID,
1694 SMB2_CLIENT_GUID_SIZE)) {
1695 rc = -ENOENT;
1696 goto out_err;
1697 }
1698
1699 if (sess->state == SMB2_SESSION_IN_PROGRESS) {
1700 rc = -EACCES;
1701 goto out_err;
1702 }
1703
1704 if (sess->state == SMB2_SESSION_EXPIRED) {
1705 rc = -EFAULT;
1706 goto out_err;
1707 }
1708
1709 if (ksmbd_session_lookup(conn, sess_id)) {
1710 rc = -EACCES;
1711 goto out_err;
1712 }
1713
1714 conn->binding = true;
1715 } else if ((conn->dialect < SMB30_PROT_ID ||
1716 server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
1717 (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
1718 sess = NULL;
1719 rc = -EACCES;
1720 goto out_err;
1721 } else {
1722 sess = ksmbd_session_lookup(conn,
1723 le64_to_cpu(req->hdr.SessionId));
1724 if (!sess) {
1725 rc = -ENOENT;
1726 goto out_err;
1727 }
1728 }
1729 work->sess = sess;
1730
1731 if (sess->state == SMB2_SESSION_EXPIRED)
1732 sess->state = SMB2_SESSION_IN_PROGRESS;
1733
1734 negblob_off = le16_to_cpu(req->SecurityBufferOffset);
1735 negblob_len = le16_to_cpu(req->SecurityBufferLength);
1736 if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer) ||
1737 negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
1738 rc = -EINVAL;
1739 goto out_err;
1740 }
1741
1742 negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
1743 negblob_off);
1744
1745 if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
1746 if (conn->mechToken)
1747 negblob = (struct negotiate_message *)conn->mechToken;
1748 }
1749
1750 if (server_conf.auth_mechs & conn->auth_mechs) {
1751 rc = generate_preauth_hash(work);
1752 if (rc)
1753 goto out_err;
1754
1755 if (conn->preferred_auth_mech &
1756 (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
1757 rc = krb5_authenticate(work);
1758 if (rc) {
1759 rc = -EINVAL;
1760 goto out_err;
1761 }
1762
1763 ksmbd_conn_set_good(work);
1764 sess->state = SMB2_SESSION_VALID;
1765 kfree(sess->Preauth_HashValue);
1766 sess->Preauth_HashValue = NULL;
1767 } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
1768 if (negblob->MessageType == NtLmNegotiate) {
1769 rc = ntlm_negotiate(work, negblob, negblob_len);
1770 if (rc)
1771 goto out_err;
1772 rsp->hdr.Status =
1773 STATUS_MORE_PROCESSING_REQUIRED;
1774 /*
1775 * Note: here total size -1 is done as an
1776 * adjustment for 0 size blob
1777 */
1778 inc_rfc1001_len(work->response_buf,
1779 le16_to_cpu(rsp->SecurityBufferLength) - 1);
1780
1781 } else if (negblob->MessageType == NtLmAuthenticate) {
1782 rc = ntlm_authenticate(work);
1783 if (rc)
1784 goto out_err;
1785
1786 ksmbd_conn_set_good(work);
1787 sess->state = SMB2_SESSION_VALID;
1788 if (conn->binding) {
1789 struct preauth_session *preauth_sess;
1790
1791 preauth_sess =
1792 ksmbd_preauth_session_lookup(conn, sess->id);
1793 if (preauth_sess) {
1794 list_del(&preauth_sess->preauth_entry);
1795 kfree(preauth_sess);
1796 }
1797 }
1798 kfree(sess->Preauth_HashValue);
1799 sess->Preauth_HashValue = NULL;
1800 }
1801 } else {
1802 /* TODO: need one more negotiation */
1803 pr_err("Not support the preferred authentication\n");
1804 rc = -EINVAL;
1805 }
1806 } else {
1807 pr_err("Not support authentication\n");
1808 rc = -EINVAL;
1809 }
1810
1811 out_err:
1812 if (rc == -EINVAL)
1813 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1814 else if (rc == -ENOENT)
1815 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
1816 else if (rc == -EACCES)
1817 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
1818 else if (rc == -EFAULT)
1819 rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
1820 else if (rc == -ENOMEM)
1821 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
1822 else if (rc)
1823 rsp->hdr.Status = STATUS_LOGON_FAILURE;
1824
1825 if (conn->use_spnego && conn->mechToken) {
1826 kfree(conn->mechToken);
1827 conn->mechToken = NULL;
1828 }
1829
1830 if (rc < 0) {
1831 /*
1832 * SecurityBufferOffset should be set to zero
1833 * in session setup error response.
1834 */
1835 rsp->SecurityBufferOffset = 0;
1836
1837 if (sess) {
1838 bool try_delay = false;
1839
1840 /*
1841 * To avoid dictionary attacks (repeated session setups rapidly sent) to
1842 * connect to server, ksmbd make a delay of a 5 seconds on session setup
1843 * failure to make it harder to send enough random connection requests
1844 * to break into a server.
1845 */
1846 if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
1847 try_delay = true;
1848
1849 xa_erase(&conn->sessions, sess->id);
1850 ksmbd_session_destroy(sess);
1851 work->sess = NULL;
1852 if (try_delay)
1853 ssleep(5);
1854 }
1855 }
1856
1857 return rc;
1858 }
1859
1860 /**
1861 * smb2_tree_connect() - handler for smb2 tree connect command
1862 * @work: smb work containing smb request buffer
1863 *
1864 * Return: 0 on success, otherwise error
1865 */
smb2_tree_connect(struct ksmbd_work * work)1866 int smb2_tree_connect(struct ksmbd_work *work)
1867 {
1868 struct ksmbd_conn *conn = work->conn;
1869 struct smb2_tree_connect_req *req = smb2_get_msg(work->request_buf);
1870 struct smb2_tree_connect_rsp *rsp = smb2_get_msg(work->response_buf);
1871 struct ksmbd_session *sess = work->sess;
1872 char *treename = NULL, *name = NULL;
1873 struct ksmbd_tree_conn_status status;
1874 struct ksmbd_share_config *share;
1875 int rc = -EINVAL;
1876
1877 treename = smb_strndup_from_utf16(req->Buffer,
1878 le16_to_cpu(req->PathLength), true,
1879 conn->local_nls);
1880 if (IS_ERR(treename)) {
1881 pr_err("treename is NULL\n");
1882 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1883 goto out_err1;
1884 }
1885
1886 name = ksmbd_extract_sharename(conn->um, treename);
1887 if (IS_ERR(name)) {
1888 status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
1889 goto out_err1;
1890 }
1891
1892 ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
1893 name, treename);
1894
1895 status = ksmbd_tree_conn_connect(conn, sess, name);
1896 if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
1897 rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
1898 else
1899 goto out_err1;
1900
1901 share = status.tree_conn->share_conf;
1902 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
1903 ksmbd_debug(SMB, "IPC share path request\n");
1904 rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
1905 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1906 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
1907 FILE_DELETE_LE | FILE_READ_CONTROL_LE |
1908 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1909 FILE_SYNCHRONIZE_LE;
1910 } else {
1911 rsp->ShareType = SMB2_SHARE_TYPE_DISK;
1912 rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
1913 FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
1914 if (test_tree_conn_flag(status.tree_conn,
1915 KSMBD_TREE_CONN_FLAG_WRITABLE)) {
1916 rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
1917 FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
1918 FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
1919 FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
1920 FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
1921 FILE_SYNCHRONIZE_LE;
1922 }
1923 }
1924
1925 status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
1926 if (conn->posix_ext_supported)
1927 status.tree_conn->posix_extensions = true;
1928
1929 rsp->StructureSize = cpu_to_le16(16);
1930 inc_rfc1001_len(work->response_buf, 16);
1931 out_err1:
1932 rsp->Capabilities = 0;
1933 rsp->Reserved = 0;
1934 /* default manual caching */
1935 rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
1936
1937 if (!IS_ERR(treename))
1938 kfree(treename);
1939 if (!IS_ERR(name))
1940 kfree(name);
1941
1942 switch (status.ret) {
1943 case KSMBD_TREE_CONN_STATUS_OK:
1944 rsp->hdr.Status = STATUS_SUCCESS;
1945 rc = 0;
1946 break;
1947 case -ESTALE:
1948 case -ENOENT:
1949 case KSMBD_TREE_CONN_STATUS_NO_SHARE:
1950 rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
1951 break;
1952 case -ENOMEM:
1953 case KSMBD_TREE_CONN_STATUS_NOMEM:
1954 rsp->hdr.Status = STATUS_NO_MEMORY;
1955 break;
1956 case KSMBD_TREE_CONN_STATUS_ERROR:
1957 case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
1958 case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
1959 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1960 break;
1961 case -EINVAL:
1962 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
1963 break;
1964 default:
1965 rsp->hdr.Status = STATUS_ACCESS_DENIED;
1966 }
1967
1968 if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
1969 smb2_set_err_rsp(work);
1970
1971 return rc;
1972 }
1973
1974 /**
1975 * smb2_create_open_flags() - convert smb open flags to unix open flags
1976 * @file_present: is file already present
1977 * @access: file access flags
1978 * @disposition: file disposition flags
1979 * @may_flags: set with MAY_ flags
1980 *
1981 * Return: file open flags
1982 */
smb2_create_open_flags(bool file_present,__le32 access,__le32 disposition,int * may_flags)1983 static int smb2_create_open_flags(bool file_present, __le32 access,
1984 __le32 disposition,
1985 int *may_flags)
1986 {
1987 int oflags = O_NONBLOCK | O_LARGEFILE;
1988
1989 if (access & FILE_READ_DESIRED_ACCESS_LE &&
1990 access & FILE_WRITE_DESIRE_ACCESS_LE) {
1991 oflags |= O_RDWR;
1992 *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
1993 } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
1994 oflags |= O_WRONLY;
1995 *may_flags = MAY_OPEN | MAY_WRITE;
1996 } else {
1997 oflags |= O_RDONLY;
1998 *may_flags = MAY_OPEN | MAY_READ;
1999 }
2000
2001 if (access == FILE_READ_ATTRIBUTES_LE)
2002 oflags |= O_PATH;
2003
2004 if (file_present) {
2005 switch (disposition & FILE_CREATE_MASK_LE) {
2006 case FILE_OPEN_LE:
2007 case FILE_CREATE_LE:
2008 break;
2009 case FILE_SUPERSEDE_LE:
2010 case FILE_OVERWRITE_LE:
2011 case FILE_OVERWRITE_IF_LE:
2012 oflags |= O_TRUNC;
2013 break;
2014 default:
2015 break;
2016 }
2017 } else {
2018 switch (disposition & FILE_CREATE_MASK_LE) {
2019 case FILE_SUPERSEDE_LE:
2020 case FILE_CREATE_LE:
2021 case FILE_OPEN_IF_LE:
2022 case FILE_OVERWRITE_IF_LE:
2023 oflags |= O_CREAT;
2024 break;
2025 case FILE_OPEN_LE:
2026 case FILE_OVERWRITE_LE:
2027 oflags &= ~O_CREAT;
2028 break;
2029 default:
2030 break;
2031 }
2032 }
2033
2034 return oflags;
2035 }
2036
2037 /**
2038 * smb2_tree_disconnect() - handler for smb tree connect request
2039 * @work: smb work containing request buffer
2040 *
2041 * Return: 0
2042 */
smb2_tree_disconnect(struct ksmbd_work * work)2043 int smb2_tree_disconnect(struct ksmbd_work *work)
2044 {
2045 struct smb2_tree_disconnect_rsp *rsp = smb2_get_msg(work->response_buf);
2046 struct ksmbd_session *sess = work->sess;
2047 struct ksmbd_tree_connect *tcon = work->tcon;
2048
2049 rsp->StructureSize = cpu_to_le16(4);
2050 inc_rfc1001_len(work->response_buf, 4);
2051
2052 ksmbd_debug(SMB, "request\n");
2053
2054 if (!tcon) {
2055 struct smb2_tree_disconnect_req *req =
2056 smb2_get_msg(work->request_buf);
2057
2058 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2059 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2060 smb2_set_err_rsp(work);
2061 return 0;
2062 }
2063
2064 ksmbd_close_tree_conn_fds(work);
2065 ksmbd_tree_conn_disconnect(sess, tcon);
2066 work->tcon = NULL;
2067 return 0;
2068 }
2069
2070 /**
2071 * smb2_session_logoff() - handler for session log off request
2072 * @work: smb work containing request buffer
2073 *
2074 * Return: 0
2075 */
smb2_session_logoff(struct ksmbd_work * work)2076 int smb2_session_logoff(struct ksmbd_work *work)
2077 {
2078 struct ksmbd_conn *conn = work->conn;
2079 struct smb2_logoff_rsp *rsp = smb2_get_msg(work->response_buf);
2080 struct ksmbd_session *sess = work->sess;
2081
2082 rsp->StructureSize = cpu_to_le16(4);
2083 inc_rfc1001_len(work->response_buf, 4);
2084
2085 ksmbd_debug(SMB, "request\n");
2086
2087 /* setting CifsExiting here may race with start_tcp_sess */
2088 ksmbd_conn_set_need_reconnect(work);
2089 ksmbd_close_session_fds(work);
2090 ksmbd_conn_wait_idle(conn);
2091
2092 if (ksmbd_tree_conn_session_logoff(sess)) {
2093 struct smb2_logoff_req *req = smb2_get_msg(work->request_buf);
2094
2095 ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
2096 rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
2097 smb2_set_err_rsp(work);
2098 return 0;
2099 }
2100
2101 ksmbd_destroy_file_table(&sess->file_table);
2102 sess->state = SMB2_SESSION_EXPIRED;
2103
2104 ksmbd_free_user(sess->user);
2105 sess->user = NULL;
2106
2107 /* let start_tcp_sess free connection info now */
2108 ksmbd_conn_set_need_negotiate(work);
2109 return 0;
2110 }
2111
2112 /**
2113 * create_smb2_pipe() - create IPC pipe
2114 * @work: smb work containing request buffer
2115 *
2116 * Return: 0 on success, otherwise error
2117 */
create_smb2_pipe(struct ksmbd_work * work)2118 static noinline int create_smb2_pipe(struct ksmbd_work *work)
2119 {
2120 struct smb2_create_rsp *rsp = smb2_get_msg(work->response_buf);
2121 struct smb2_create_req *req = smb2_get_msg(work->request_buf);
2122 int id;
2123 int err;
2124 char *name;
2125
2126 name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
2127 1, work->conn->local_nls);
2128 if (IS_ERR(name)) {
2129 rsp->hdr.Status = STATUS_NO_MEMORY;
2130 err = PTR_ERR(name);
2131 goto out;
2132 }
2133
2134 id = ksmbd_session_rpc_open(work->sess, name);
2135 if (id < 0) {
2136 pr_err("Unable to open RPC pipe: %d\n", id);
2137 err = id;
2138 goto out;
2139 }
2140
2141 rsp->hdr.Status = STATUS_SUCCESS;
2142 rsp->StructureSize = cpu_to_le16(89);
2143 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
2144 rsp->Flags = 0;
2145 rsp->CreateAction = cpu_to_le32(FILE_OPENED);
2146
2147 rsp->CreationTime = cpu_to_le64(0);
2148 rsp->LastAccessTime = cpu_to_le64(0);
2149 rsp->ChangeTime = cpu_to_le64(0);
2150 rsp->AllocationSize = cpu_to_le64(0);
2151 rsp->EndofFile = cpu_to_le64(0);
2152 rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
2153 rsp->Reserved2 = 0;
2154 rsp->VolatileFileId = id;
2155 rsp->PersistentFileId = 0;
2156 rsp->CreateContextsOffset = 0;
2157 rsp->CreateContextsLength = 0;
2158
2159 inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
2160 kfree(name);
2161 return 0;
2162
2163 out:
2164 switch (err) {
2165 case -EINVAL:
2166 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2167 break;
2168 case -ENOSPC:
2169 case -ENOMEM:
2170 rsp->hdr.Status = STATUS_NO_MEMORY;
2171 break;
2172 }
2173
2174 if (!IS_ERR(name))
2175 kfree(name);
2176
2177 smb2_set_err_rsp(work);
2178 return err;
2179 }
2180
2181 /**
2182 * smb2_set_ea() - handler for setting extended attributes using set
2183 * info command
2184 * @eabuf: set info command buffer
2185 * @buf_len: set info command buffer length
2186 * @path: dentry path for get ea
2187 *
2188 * Return: 0 on success, otherwise error
2189 */
smb2_set_ea(struct smb2_ea_info * eabuf,unsigned int buf_len,const struct path * path)2190 static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
2191 const struct path *path)
2192 {
2193 struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2194 char *attr_name = NULL, *value;
2195 int rc = 0;
2196 unsigned int next = 0;
2197
2198 if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
2199 le16_to_cpu(eabuf->EaValueLength))
2200 return -EINVAL;
2201
2202 attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
2203 if (!attr_name)
2204 return -ENOMEM;
2205
2206 do {
2207 if (!eabuf->EaNameLength)
2208 goto next;
2209
2210 ksmbd_debug(SMB,
2211 "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
2212 eabuf->name, eabuf->EaNameLength,
2213 le16_to_cpu(eabuf->EaValueLength),
2214 le32_to_cpu(eabuf->NextEntryOffset));
2215
2216 if (eabuf->EaNameLength >
2217 (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
2218 rc = -EINVAL;
2219 break;
2220 }
2221
2222 memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2223 memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
2224 eabuf->EaNameLength);
2225 attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
2226 value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
2227
2228 if (!eabuf->EaValueLength) {
2229 rc = ksmbd_vfs_casexattr_len(user_ns,
2230 path->dentry,
2231 attr_name,
2232 XATTR_USER_PREFIX_LEN +
2233 eabuf->EaNameLength);
2234
2235 /* delete the EA only when it exits */
2236 if (rc > 0) {
2237 rc = ksmbd_vfs_remove_xattr(user_ns,
2238 path->dentry,
2239 attr_name);
2240
2241 if (rc < 0) {
2242 ksmbd_debug(SMB,
2243 "remove xattr failed(%d)\n",
2244 rc);
2245 break;
2246 }
2247 }
2248
2249 /* if the EA doesn't exist, just do nothing. */
2250 rc = 0;
2251 } else {
2252 rc = ksmbd_vfs_setxattr(user_ns,
2253 path->dentry, attr_name, value,
2254 le16_to_cpu(eabuf->EaValueLength), 0);
2255 if (rc < 0) {
2256 ksmbd_debug(SMB,
2257 "ksmbd_vfs_setxattr is failed(%d)\n",
2258 rc);
2259 break;
2260 }
2261 }
2262
2263 next:
2264 next = le32_to_cpu(eabuf->NextEntryOffset);
2265 if (next == 0 || buf_len < next)
2266 break;
2267 buf_len -= next;
2268 eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
2269 if (next < (u32)eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength))
2270 break;
2271
2272 } while (next != 0);
2273
2274 kfree(attr_name);
2275 return rc;
2276 }
2277
smb2_set_stream_name_xattr(const struct path * path,struct ksmbd_file * fp,char * stream_name,int s_type)2278 static noinline int smb2_set_stream_name_xattr(const struct path *path,
2279 struct ksmbd_file *fp,
2280 char *stream_name, int s_type)
2281 {
2282 struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2283 size_t xattr_stream_size;
2284 char *xattr_stream_name;
2285 int rc;
2286
2287 rc = ksmbd_vfs_xattr_stream_name(stream_name,
2288 &xattr_stream_name,
2289 &xattr_stream_size,
2290 s_type);
2291 if (rc)
2292 return rc;
2293
2294 fp->stream.name = xattr_stream_name;
2295 fp->stream.size = xattr_stream_size;
2296
2297 /* Check if there is stream prefix in xattr space */
2298 rc = ksmbd_vfs_casexattr_len(user_ns,
2299 path->dentry,
2300 xattr_stream_name,
2301 xattr_stream_size);
2302 if (rc >= 0)
2303 return 0;
2304
2305 if (fp->cdoption == FILE_OPEN_LE) {
2306 ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
2307 return -EBADF;
2308 }
2309
2310 rc = ksmbd_vfs_setxattr(user_ns, path->dentry,
2311 xattr_stream_name, NULL, 0, 0);
2312 if (rc < 0)
2313 pr_err("Failed to store XATTR stream name :%d\n", rc);
2314 return 0;
2315 }
2316
smb2_remove_smb_xattrs(const struct path * path)2317 static int smb2_remove_smb_xattrs(const struct path *path)
2318 {
2319 struct user_namespace *user_ns = mnt_user_ns(path->mnt);
2320 char *name, *xattr_list = NULL;
2321 ssize_t xattr_list_len;
2322 int err = 0;
2323
2324 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
2325 if (xattr_list_len < 0) {
2326 goto out;
2327 } else if (!xattr_list_len) {
2328 ksmbd_debug(SMB, "empty xattr in the file\n");
2329 goto out;
2330 }
2331
2332 for (name = xattr_list; name - xattr_list < xattr_list_len;
2333 name += strlen(name) + 1) {
2334 ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
2335
2336 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
2337 !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
2338 STREAM_PREFIX_LEN)) {
2339 err = ksmbd_vfs_remove_xattr(user_ns, path->dentry,
2340 name);
2341 if (err)
2342 ksmbd_debug(SMB, "remove xattr failed : %s\n",
2343 name);
2344 }
2345 }
2346 out:
2347 kvfree(xattr_list);
2348 return err;
2349 }
2350
smb2_create_truncate(const struct path * path)2351 static int smb2_create_truncate(const struct path *path)
2352 {
2353 int rc = vfs_truncate(path, 0);
2354
2355 if (rc) {
2356 pr_err("vfs_truncate failed, rc %d\n", rc);
2357 return rc;
2358 }
2359
2360 rc = smb2_remove_smb_xattrs(path);
2361 if (rc == -EOPNOTSUPP)
2362 rc = 0;
2363 if (rc)
2364 ksmbd_debug(SMB,
2365 "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
2366 rc);
2367 return rc;
2368 }
2369
smb2_new_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2370 static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
2371 struct ksmbd_file *fp)
2372 {
2373 struct xattr_dos_attrib da = {0};
2374 int rc;
2375
2376 if (!test_share_config_flag(tcon->share_conf,
2377 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2378 return;
2379
2380 da.version = 4;
2381 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
2382 da.itime = da.create_time = fp->create_time;
2383 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
2384 XATTR_DOSINFO_ITIME;
2385
2386 rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_user_ns(path->mnt),
2387 path->dentry, &da);
2388 if (rc)
2389 ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
2390 }
2391
smb2_update_xattrs(struct ksmbd_tree_connect * tcon,const struct path * path,struct ksmbd_file * fp)2392 static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
2393 const struct path *path, struct ksmbd_file *fp)
2394 {
2395 struct xattr_dos_attrib da;
2396 int rc;
2397
2398 fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
2399
2400 /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
2401 if (!test_share_config_flag(tcon->share_conf,
2402 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
2403 return;
2404
2405 rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_user_ns(path->mnt),
2406 path->dentry, &da);
2407 if (rc > 0) {
2408 fp->f_ci->m_fattr = cpu_to_le32(da.attr);
2409 fp->create_time = da.create_time;
2410 fp->itime = da.itime;
2411 }
2412 }
2413
smb2_creat(struct ksmbd_work * work,struct path * path,char * name,int open_flags,umode_t posix_mode,bool is_dir)2414 static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name,
2415 int open_flags, umode_t posix_mode, bool is_dir)
2416 {
2417 struct ksmbd_tree_connect *tcon = work->tcon;
2418 struct ksmbd_share_config *share = tcon->share_conf;
2419 umode_t mode;
2420 int rc;
2421
2422 if (!(open_flags & O_CREAT))
2423 return -EBADF;
2424
2425 ksmbd_debug(SMB, "file does not exist, so creating\n");
2426 if (is_dir == true) {
2427 ksmbd_debug(SMB, "creating directory\n");
2428
2429 mode = share_config_directory_mode(share, posix_mode);
2430 rc = ksmbd_vfs_mkdir(work, name, mode);
2431 if (rc)
2432 return rc;
2433 } else {
2434 ksmbd_debug(SMB, "creating regular file\n");
2435
2436 mode = share_config_create_mode(share, posix_mode);
2437 rc = ksmbd_vfs_create(work, name, mode);
2438 if (rc)
2439 return rc;
2440 }
2441
2442 rc = ksmbd_vfs_kern_path(work, name, 0, path, 0);
2443 if (rc) {
2444 pr_err("cannot get linux path (%s), err = %d\n",
2445 name, rc);
2446 return rc;
2447 }
2448 return 0;
2449 }
2450
smb2_create_sd_buffer(struct ksmbd_work * work,struct smb2_create_req * req,const struct path * path)2451 static int smb2_create_sd_buffer(struct ksmbd_work *work,
2452 struct smb2_create_req *req,
2453 const struct path *path)
2454 {
2455 struct create_context *context;
2456 struct create_sd_buf_req *sd_buf;
2457
2458 if (!req->CreateContextsOffset)
2459 return -ENOENT;
2460
2461 /* Parse SD BUFFER create contexts */
2462 context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER);
2463 if (!context)
2464 return -ENOENT;
2465 else if (IS_ERR(context))
2466 return PTR_ERR(context);
2467
2468 ksmbd_debug(SMB,
2469 "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
2470 sd_buf = (struct create_sd_buf_req *)context;
2471 if (le16_to_cpu(context->DataOffset) +
2472 le32_to_cpu(context->DataLength) <
2473 sizeof(struct create_sd_buf_req))
2474 return -EINVAL;
2475 return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
2476 le32_to_cpu(sd_buf->ccontext.DataLength), true);
2477 }
2478
ksmbd_acls_fattr(struct smb_fattr * fattr,struct user_namespace * mnt_userns,struct inode * inode)2479 static void ksmbd_acls_fattr(struct smb_fattr *fattr,
2480 struct user_namespace *mnt_userns,
2481 struct inode *inode)
2482 {
2483 vfsuid_t vfsuid = i_uid_into_vfsuid(mnt_userns, inode);
2484 vfsgid_t vfsgid = i_gid_into_vfsgid(mnt_userns, inode);
2485
2486 fattr->cf_uid = vfsuid_into_kuid(vfsuid);
2487 fattr->cf_gid = vfsgid_into_kgid(vfsgid);
2488 fattr->cf_mode = inode->i_mode;
2489 fattr->cf_acls = NULL;
2490 fattr->cf_dacls = NULL;
2491
2492 if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
2493 fattr->cf_acls = get_acl(inode, ACL_TYPE_ACCESS);
2494 if (S_ISDIR(inode->i_mode))
2495 fattr->cf_dacls = get_acl(inode, ACL_TYPE_DEFAULT);
2496 }
2497 }
2498
2499 /**
2500 * smb2_open() - handler for smb file open request
2501 * @work: smb work containing request buffer
2502 *
2503 * Return: 0 on success, otherwise error
2504 */
smb2_open(struct ksmbd_work * work)2505 int smb2_open(struct ksmbd_work *work)
2506 {
2507 struct ksmbd_conn *conn = work->conn;
2508 struct ksmbd_session *sess = work->sess;
2509 struct ksmbd_tree_connect *tcon = work->tcon;
2510 struct smb2_create_req *req;
2511 struct smb2_create_rsp *rsp;
2512 struct path path;
2513 struct ksmbd_share_config *share = tcon->share_conf;
2514 struct ksmbd_file *fp = NULL;
2515 struct file *filp = NULL;
2516 struct user_namespace *user_ns = NULL;
2517 struct kstat stat;
2518 struct create_context *context;
2519 struct lease_ctx_info *lc = NULL;
2520 struct create_ea_buf_req *ea_buf = NULL;
2521 struct oplock_info *opinfo;
2522 __le32 *next_ptr = NULL;
2523 int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
2524 int rc = 0;
2525 int contxt_cnt = 0, query_disk_id = 0;
2526 int maximal_access_ctxt = 0, posix_ctxt = 0;
2527 int s_type = 0;
2528 int next_off = 0;
2529 char *name = NULL;
2530 char *stream_name = NULL;
2531 bool file_present = false, created = false, already_permitted = false;
2532 int share_ret, need_truncate = 0;
2533 u64 time;
2534 umode_t posix_mode = 0;
2535 __le32 daccess, maximal_access = 0;
2536
2537 WORK_BUFFERS(work, req, rsp);
2538
2539 if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
2540 (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
2541 ksmbd_debug(SMB, "invalid flag in chained command\n");
2542 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
2543 smb2_set_err_rsp(work);
2544 return -EINVAL;
2545 }
2546
2547 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
2548 ksmbd_debug(SMB, "IPC pipe create request\n");
2549 return create_smb2_pipe(work);
2550 }
2551
2552 if (req->NameLength) {
2553 if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2554 *(char *)req->Buffer == '\\') {
2555 pr_err("not allow directory name included leading slash\n");
2556 rc = -EINVAL;
2557 goto err_out1;
2558 }
2559
2560 name = smb2_get_name(req->Buffer,
2561 le16_to_cpu(req->NameLength),
2562 work->conn->local_nls);
2563 if (IS_ERR(name)) {
2564 rc = PTR_ERR(name);
2565 if (rc != -ENOMEM)
2566 rc = -ENOENT;
2567 name = NULL;
2568 goto err_out1;
2569 }
2570
2571 ksmbd_debug(SMB, "converted name = %s\n", name);
2572 if (strchr(name, ':')) {
2573 if (!test_share_config_flag(work->tcon->share_conf,
2574 KSMBD_SHARE_FLAG_STREAMS)) {
2575 rc = -EBADF;
2576 goto err_out1;
2577 }
2578 rc = parse_stream_name(name, &stream_name, &s_type);
2579 if (rc < 0)
2580 goto err_out1;
2581 }
2582
2583 rc = ksmbd_validate_filename(name);
2584 if (rc < 0)
2585 goto err_out1;
2586
2587 if (ksmbd_share_veto_filename(share, name)) {
2588 rc = -ENOENT;
2589 ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
2590 name);
2591 goto err_out1;
2592 }
2593 } else {
2594 name = kstrdup("", GFP_KERNEL);
2595 if (!name) {
2596 rc = -ENOMEM;
2597 goto err_out1;
2598 }
2599 }
2600
2601 req_op_level = req->RequestedOplockLevel;
2602 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
2603 lc = parse_lease_state(req);
2604
2605 if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
2606 pr_err("Invalid impersonationlevel : 0x%x\n",
2607 le32_to_cpu(req->ImpersonationLevel));
2608 rc = -EIO;
2609 rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
2610 goto err_out1;
2611 }
2612
2613 if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
2614 pr_err("Invalid create options : 0x%x\n",
2615 le32_to_cpu(req->CreateOptions));
2616 rc = -EINVAL;
2617 goto err_out1;
2618 } else {
2619 if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
2620 req->CreateOptions & FILE_RANDOM_ACCESS_LE)
2621 req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
2622
2623 if (req->CreateOptions &
2624 (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
2625 FILE_RESERVE_OPFILTER_LE)) {
2626 rc = -EOPNOTSUPP;
2627 goto err_out1;
2628 }
2629
2630 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2631 if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
2632 rc = -EINVAL;
2633 goto err_out1;
2634 } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
2635 req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
2636 }
2637 }
2638 }
2639
2640 if (le32_to_cpu(req->CreateDisposition) >
2641 le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
2642 pr_err("Invalid create disposition : 0x%x\n",
2643 le32_to_cpu(req->CreateDisposition));
2644 rc = -EINVAL;
2645 goto err_out1;
2646 }
2647
2648 if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
2649 pr_err("Invalid desired access : 0x%x\n",
2650 le32_to_cpu(req->DesiredAccess));
2651 rc = -EACCES;
2652 goto err_out1;
2653 }
2654
2655 if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
2656 pr_err("Invalid file attribute : 0x%x\n",
2657 le32_to_cpu(req->FileAttributes));
2658 rc = -EINVAL;
2659 goto err_out1;
2660 }
2661
2662 if (req->CreateContextsOffset) {
2663 /* Parse non-durable handle create contexts */
2664 context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER);
2665 if (IS_ERR(context)) {
2666 rc = PTR_ERR(context);
2667 goto err_out1;
2668 } else if (context) {
2669 ea_buf = (struct create_ea_buf_req *)context;
2670 if (le16_to_cpu(context->DataOffset) +
2671 le32_to_cpu(context->DataLength) <
2672 sizeof(struct create_ea_buf_req)) {
2673 rc = -EINVAL;
2674 goto err_out1;
2675 }
2676 if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
2677 rsp->hdr.Status = STATUS_ACCESS_DENIED;
2678 rc = -EACCES;
2679 goto err_out1;
2680 }
2681 }
2682
2683 context = smb2_find_context_vals(req,
2684 SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST);
2685 if (IS_ERR(context)) {
2686 rc = PTR_ERR(context);
2687 goto err_out1;
2688 } else if (context) {
2689 ksmbd_debug(SMB,
2690 "get query maximal access context\n");
2691 maximal_access_ctxt = 1;
2692 }
2693
2694 context = smb2_find_context_vals(req,
2695 SMB2_CREATE_TIMEWARP_REQUEST);
2696 if (IS_ERR(context)) {
2697 rc = PTR_ERR(context);
2698 goto err_out1;
2699 } else if (context) {
2700 ksmbd_debug(SMB, "get timewarp context\n");
2701 rc = -EBADF;
2702 goto err_out1;
2703 }
2704
2705 if (tcon->posix_extensions) {
2706 context = smb2_find_context_vals(req,
2707 SMB2_CREATE_TAG_POSIX);
2708 if (IS_ERR(context)) {
2709 rc = PTR_ERR(context);
2710 goto err_out1;
2711 } else if (context) {
2712 struct create_posix *posix =
2713 (struct create_posix *)context;
2714 if (le16_to_cpu(context->DataOffset) +
2715 le32_to_cpu(context->DataLength) <
2716 sizeof(struct create_posix) - 4) {
2717 rc = -EINVAL;
2718 goto err_out1;
2719 }
2720 ksmbd_debug(SMB, "get posix context\n");
2721
2722 posix_mode = le32_to_cpu(posix->Mode);
2723 posix_ctxt = 1;
2724 }
2725 }
2726 }
2727
2728 if (ksmbd_override_fsids(work)) {
2729 rc = -ENOMEM;
2730 goto err_out1;
2731 }
2732
2733 rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1);
2734 if (!rc) {
2735 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
2736 /*
2737 * If file exists with under flags, return access
2738 * denied error.
2739 */
2740 if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
2741 req->CreateDisposition == FILE_OPEN_IF_LE) {
2742 rc = -EACCES;
2743 path_put(&path);
2744 goto err_out;
2745 }
2746
2747 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2748 ksmbd_debug(SMB,
2749 "User does not have write permission\n");
2750 rc = -EACCES;
2751 path_put(&path);
2752 goto err_out;
2753 }
2754 } else if (d_is_symlink(path.dentry)) {
2755 rc = -EACCES;
2756 path_put(&path);
2757 goto err_out;
2758 }
2759 }
2760
2761 if (rc) {
2762 if (rc != -ENOENT)
2763 goto err_out;
2764 ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
2765 name, rc);
2766 rc = 0;
2767 } else {
2768 file_present = true;
2769 user_ns = mnt_user_ns(path.mnt);
2770 }
2771 if (stream_name) {
2772 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
2773 if (s_type == DATA_STREAM) {
2774 rc = -EIO;
2775 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2776 }
2777 } else {
2778 if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
2779 s_type == DATA_STREAM) {
2780 rc = -EIO;
2781 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2782 }
2783 }
2784
2785 if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
2786 req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
2787 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2788 rc = -EIO;
2789 }
2790
2791 if (rc < 0)
2792 goto err_out;
2793 }
2794
2795 if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
2796 S_ISDIR(d_inode(path.dentry)->i_mode) &&
2797 !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2798 ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
2799 name, req->CreateOptions);
2800 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
2801 rc = -EIO;
2802 goto err_out;
2803 }
2804
2805 if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
2806 !(req->CreateDisposition == FILE_CREATE_LE) &&
2807 !S_ISDIR(d_inode(path.dentry)->i_mode)) {
2808 rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
2809 rc = -EIO;
2810 goto err_out;
2811 }
2812
2813 if (!stream_name && file_present &&
2814 req->CreateDisposition == FILE_CREATE_LE) {
2815 rc = -EEXIST;
2816 goto err_out;
2817 }
2818
2819 daccess = smb_map_generic_desired_access(req->DesiredAccess);
2820
2821 if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2822 rc = smb_check_perm_dacl(conn, &path, &daccess,
2823 sess->user->uid);
2824 if (rc)
2825 goto err_out;
2826 }
2827
2828 if (daccess & FILE_MAXIMAL_ACCESS_LE) {
2829 if (!file_present) {
2830 daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
2831 } else {
2832 rc = ksmbd_vfs_query_maximal_access(user_ns,
2833 path.dentry,
2834 &daccess);
2835 if (rc)
2836 goto err_out;
2837 already_permitted = true;
2838 }
2839 maximal_access = daccess;
2840 }
2841
2842 open_flags = smb2_create_open_flags(file_present, daccess,
2843 req->CreateDisposition,
2844 &may_flags);
2845
2846 if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
2847 if (open_flags & O_CREAT) {
2848 ksmbd_debug(SMB,
2849 "User does not have write permission\n");
2850 rc = -EACCES;
2851 goto err_out;
2852 }
2853 }
2854
2855 /*create file if not present */
2856 if (!file_present) {
2857 rc = smb2_creat(work, &path, name, open_flags, posix_mode,
2858 req->CreateOptions & FILE_DIRECTORY_FILE_LE);
2859 if (rc) {
2860 if (rc == -ENOENT) {
2861 rc = -EIO;
2862 rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
2863 }
2864 goto err_out;
2865 }
2866
2867 created = true;
2868 user_ns = mnt_user_ns(path.mnt);
2869 if (ea_buf) {
2870 if (le32_to_cpu(ea_buf->ccontext.DataLength) <
2871 sizeof(struct smb2_ea_info)) {
2872 rc = -EINVAL;
2873 goto err_out;
2874 }
2875
2876 rc = smb2_set_ea(&ea_buf->ea,
2877 le32_to_cpu(ea_buf->ccontext.DataLength),
2878 &path);
2879 if (rc == -EOPNOTSUPP)
2880 rc = 0;
2881 else if (rc)
2882 goto err_out;
2883 }
2884 } else if (!already_permitted) {
2885 /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
2886 * because execute(search) permission on a parent directory,
2887 * is already granted.
2888 */
2889 if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
2890 rc = inode_permission(user_ns,
2891 d_inode(path.dentry),
2892 may_flags);
2893 if (rc)
2894 goto err_out;
2895
2896 if ((daccess & FILE_DELETE_LE) ||
2897 (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
2898 rc = ksmbd_vfs_may_delete(user_ns,
2899 path.dentry);
2900 if (rc)
2901 goto err_out;
2902 }
2903 }
2904 }
2905
2906 rc = ksmbd_query_inode_status(d_inode(path.dentry->d_parent));
2907 if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
2908 rc = -EBUSY;
2909 goto err_out;
2910 }
2911
2912 rc = 0;
2913 filp = dentry_open(&path, open_flags, current_cred());
2914 if (IS_ERR(filp)) {
2915 rc = PTR_ERR(filp);
2916 pr_err("dentry open for dir failed, rc %d\n", rc);
2917 goto err_out;
2918 }
2919
2920 if (file_present) {
2921 if (!(open_flags & O_TRUNC))
2922 file_info = FILE_OPENED;
2923 else
2924 file_info = FILE_OVERWRITTEN;
2925
2926 if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
2927 FILE_SUPERSEDE_LE)
2928 file_info = FILE_SUPERSEDED;
2929 } else if (open_flags & O_CREAT) {
2930 file_info = FILE_CREATED;
2931 }
2932
2933 ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
2934
2935 /* Obtain Volatile-ID */
2936 fp = ksmbd_open_fd(work, filp);
2937 if (IS_ERR(fp)) {
2938 fput(filp);
2939 rc = PTR_ERR(fp);
2940 fp = NULL;
2941 goto err_out;
2942 }
2943
2944 /* Get Persistent-ID */
2945 ksmbd_open_durable_fd(fp);
2946 if (!has_file_id(fp->persistent_id)) {
2947 rc = -ENOMEM;
2948 goto err_out;
2949 }
2950
2951 fp->cdoption = req->CreateDisposition;
2952 fp->daccess = daccess;
2953 fp->saccess = req->ShareAccess;
2954 fp->coption = req->CreateOptions;
2955
2956 /* Set default windows and posix acls if creating new file */
2957 if (created) {
2958 int posix_acl_rc;
2959 struct inode *inode = d_inode(path.dentry);
2960
2961 posix_acl_rc = ksmbd_vfs_inherit_posix_acl(user_ns,
2962 inode,
2963 d_inode(path.dentry->d_parent));
2964 if (posix_acl_rc)
2965 ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
2966
2967 if (test_share_config_flag(work->tcon->share_conf,
2968 KSMBD_SHARE_FLAG_ACL_XATTR)) {
2969 rc = smb_inherit_dacl(conn, &path, sess->user->uid,
2970 sess->user->gid);
2971 }
2972
2973 if (rc) {
2974 rc = smb2_create_sd_buffer(work, req, &path);
2975 if (rc) {
2976 if (posix_acl_rc)
2977 ksmbd_vfs_set_init_posix_acl(user_ns,
2978 inode);
2979
2980 if (test_share_config_flag(work->tcon->share_conf,
2981 KSMBD_SHARE_FLAG_ACL_XATTR)) {
2982 struct smb_fattr fattr;
2983 struct smb_ntsd *pntsd;
2984 int pntsd_size, ace_num = 0;
2985
2986 ksmbd_acls_fattr(&fattr, user_ns, inode);
2987 if (fattr.cf_acls)
2988 ace_num = fattr.cf_acls->a_count;
2989 if (fattr.cf_dacls)
2990 ace_num += fattr.cf_dacls->a_count;
2991
2992 pntsd = kmalloc(sizeof(struct smb_ntsd) +
2993 sizeof(struct smb_sid) * 3 +
2994 sizeof(struct smb_acl) +
2995 sizeof(struct smb_ace) * ace_num * 2,
2996 GFP_KERNEL);
2997 if (!pntsd)
2998 goto err_out;
2999
3000 rc = build_sec_desc(user_ns,
3001 pntsd, NULL, 0,
3002 OWNER_SECINFO |
3003 GROUP_SECINFO |
3004 DACL_SECINFO,
3005 &pntsd_size, &fattr);
3006 posix_acl_release(fattr.cf_acls);
3007 posix_acl_release(fattr.cf_dacls);
3008 if (rc) {
3009 kfree(pntsd);
3010 goto err_out;
3011 }
3012
3013 rc = ksmbd_vfs_set_sd_xattr(conn,
3014 user_ns,
3015 path.dentry,
3016 pntsd,
3017 pntsd_size);
3018 kfree(pntsd);
3019 if (rc)
3020 pr_err("failed to store ntacl in xattr : %d\n",
3021 rc);
3022 }
3023 }
3024 }
3025 rc = 0;
3026 }
3027
3028 if (stream_name) {
3029 rc = smb2_set_stream_name_xattr(&path,
3030 fp,
3031 stream_name,
3032 s_type);
3033 if (rc)
3034 goto err_out;
3035 file_info = FILE_CREATED;
3036 }
3037
3038 fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
3039 FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
3040 if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
3041 !fp->attrib_only && !stream_name) {
3042 smb_break_all_oplock(work, fp);
3043 need_truncate = 1;
3044 }
3045
3046 /* fp should be searchable through ksmbd_inode.m_fp_list
3047 * after daccess, saccess, attrib_only, and stream are
3048 * initialized.
3049 */
3050 write_lock(&fp->f_ci->m_lock);
3051 list_add(&fp->node, &fp->f_ci->m_fp_list);
3052 write_unlock(&fp->f_ci->m_lock);
3053
3054 /* Check delete pending among previous fp before oplock break */
3055 if (ksmbd_inode_pending_delete(fp)) {
3056 rc = -EBUSY;
3057 goto err_out;
3058 }
3059
3060 share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
3061 if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
3062 (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
3063 !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
3064 if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
3065 rc = share_ret;
3066 goto err_out;
3067 }
3068 } else {
3069 if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
3070 req_op_level = smb2_map_lease_to_oplock(lc->req_state);
3071 ksmbd_debug(SMB,
3072 "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
3073 name, req_op_level, lc->req_state);
3074 rc = find_same_lease_key(sess, fp->f_ci, lc);
3075 if (rc)
3076 goto err_out;
3077 } else if (open_flags == O_RDONLY &&
3078 (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
3079 req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
3080 req_op_level = SMB2_OPLOCK_LEVEL_II;
3081
3082 rc = smb_grant_oplock(work, req_op_level,
3083 fp->persistent_id, fp,
3084 le32_to_cpu(req->hdr.Id.SyncId.TreeId),
3085 lc, share_ret);
3086 if (rc < 0)
3087 goto err_out;
3088 }
3089
3090 if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
3091 ksmbd_fd_set_delete_on_close(fp, file_info);
3092
3093 if (need_truncate) {
3094 rc = smb2_create_truncate(&path);
3095 if (rc)
3096 goto err_out;
3097 }
3098
3099 if (req->CreateContextsOffset) {
3100 struct create_alloc_size_req *az_req;
3101
3102 az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
3103 SMB2_CREATE_ALLOCATION_SIZE);
3104 if (IS_ERR(az_req)) {
3105 rc = PTR_ERR(az_req);
3106 goto err_out;
3107 } else if (az_req) {
3108 loff_t alloc_size;
3109 int err;
3110
3111 if (le16_to_cpu(az_req->ccontext.DataOffset) +
3112 le32_to_cpu(az_req->ccontext.DataLength) <
3113 sizeof(struct create_alloc_size_req)) {
3114 rc = -EINVAL;
3115 goto err_out;
3116 }
3117 alloc_size = le64_to_cpu(az_req->AllocationSize);
3118 ksmbd_debug(SMB,
3119 "request smb2 create allocate size : %llu\n",
3120 alloc_size);
3121 smb_break_all_levII_oplock(work, fp, 1);
3122 err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
3123 alloc_size);
3124 if (err < 0)
3125 ksmbd_debug(SMB,
3126 "vfs_fallocate is failed : %d\n",
3127 err);
3128 }
3129
3130 context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID);
3131 if (IS_ERR(context)) {
3132 rc = PTR_ERR(context);
3133 goto err_out;
3134 } else if (context) {
3135 ksmbd_debug(SMB, "get query on disk id context\n");
3136 query_disk_id = 1;
3137 }
3138 }
3139
3140 rc = ksmbd_vfs_getattr(&path, &stat);
3141 if (rc)
3142 goto err_out;
3143
3144 if (stat.result_mask & STATX_BTIME)
3145 fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
3146 else
3147 fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
3148 if (req->FileAttributes || fp->f_ci->m_fattr == 0)
3149 fp->f_ci->m_fattr =
3150 cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
3151
3152 if (!created)
3153 smb2_update_xattrs(tcon, &path, fp);
3154 else
3155 smb2_new_xattrs(tcon, &path, fp);
3156
3157 memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
3158
3159 rsp->StructureSize = cpu_to_le16(89);
3160 rcu_read_lock();
3161 opinfo = rcu_dereference(fp->f_opinfo);
3162 rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
3163 rcu_read_unlock();
3164 rsp->Flags = 0;
3165 rsp->CreateAction = cpu_to_le32(file_info);
3166 rsp->CreationTime = cpu_to_le64(fp->create_time);
3167 time = ksmbd_UnixTimeToNT(stat.atime);
3168 rsp->LastAccessTime = cpu_to_le64(time);
3169 time = ksmbd_UnixTimeToNT(stat.mtime);
3170 rsp->LastWriteTime = cpu_to_le64(time);
3171 time = ksmbd_UnixTimeToNT(stat.ctime);
3172 rsp->ChangeTime = cpu_to_le64(time);
3173 rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
3174 cpu_to_le64(stat.blocks << 9);
3175 rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
3176 rsp->FileAttributes = fp->f_ci->m_fattr;
3177
3178 rsp->Reserved2 = 0;
3179
3180 rsp->PersistentFileId = fp->persistent_id;
3181 rsp->VolatileFileId = fp->volatile_id;
3182
3183 rsp->CreateContextsOffset = 0;
3184 rsp->CreateContextsLength = 0;
3185 inc_rfc1001_len(work->response_buf, 88); /* StructureSize - 1*/
3186
3187 /* If lease is request send lease context response */
3188 if (opinfo && opinfo->is_lease) {
3189 struct create_context *lease_ccontext;
3190
3191 ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
3192 name, opinfo->o_lease->state);
3193 rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
3194
3195 lease_ccontext = (struct create_context *)rsp->Buffer;
3196 contxt_cnt++;
3197 create_lease_buf(rsp->Buffer, opinfo->o_lease);
3198 le32_add_cpu(&rsp->CreateContextsLength,
3199 conn->vals->create_lease_size);
3200 inc_rfc1001_len(work->response_buf,
3201 conn->vals->create_lease_size);
3202 next_ptr = &lease_ccontext->Next;
3203 next_off = conn->vals->create_lease_size;
3204 }
3205
3206 if (maximal_access_ctxt) {
3207 struct create_context *mxac_ccontext;
3208
3209 if (maximal_access == 0)
3210 ksmbd_vfs_query_maximal_access(user_ns,
3211 path.dentry,
3212 &maximal_access);
3213 mxac_ccontext = (struct create_context *)(rsp->Buffer +
3214 le32_to_cpu(rsp->CreateContextsLength));
3215 contxt_cnt++;
3216 create_mxac_rsp_buf(rsp->Buffer +
3217 le32_to_cpu(rsp->CreateContextsLength),
3218 le32_to_cpu(maximal_access));
3219 le32_add_cpu(&rsp->CreateContextsLength,
3220 conn->vals->create_mxac_size);
3221 inc_rfc1001_len(work->response_buf,
3222 conn->vals->create_mxac_size);
3223 if (next_ptr)
3224 *next_ptr = cpu_to_le32(next_off);
3225 next_ptr = &mxac_ccontext->Next;
3226 next_off = conn->vals->create_mxac_size;
3227 }
3228
3229 if (query_disk_id) {
3230 struct create_context *disk_id_ccontext;
3231
3232 disk_id_ccontext = (struct create_context *)(rsp->Buffer +
3233 le32_to_cpu(rsp->CreateContextsLength));
3234 contxt_cnt++;
3235 create_disk_id_rsp_buf(rsp->Buffer +
3236 le32_to_cpu(rsp->CreateContextsLength),
3237 stat.ino, tcon->id);
3238 le32_add_cpu(&rsp->CreateContextsLength,
3239 conn->vals->create_disk_id_size);
3240 inc_rfc1001_len(work->response_buf,
3241 conn->vals->create_disk_id_size);
3242 if (next_ptr)
3243 *next_ptr = cpu_to_le32(next_off);
3244 next_ptr = &disk_id_ccontext->Next;
3245 next_off = conn->vals->create_disk_id_size;
3246 }
3247
3248 if (posix_ctxt) {
3249 contxt_cnt++;
3250 create_posix_rsp_buf(rsp->Buffer +
3251 le32_to_cpu(rsp->CreateContextsLength),
3252 fp);
3253 le32_add_cpu(&rsp->CreateContextsLength,
3254 conn->vals->create_posix_size);
3255 inc_rfc1001_len(work->response_buf,
3256 conn->vals->create_posix_size);
3257 if (next_ptr)
3258 *next_ptr = cpu_to_le32(next_off);
3259 }
3260
3261 if (contxt_cnt > 0) {
3262 rsp->CreateContextsOffset =
3263 cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
3264 }
3265
3266 err_out:
3267 if (file_present || created)
3268 path_put(&path);
3269 ksmbd_revert_fsids(work);
3270 err_out1:
3271 if (rc) {
3272 if (rc == -EINVAL)
3273 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
3274 else if (rc == -EOPNOTSUPP)
3275 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
3276 else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
3277 rsp->hdr.Status = STATUS_ACCESS_DENIED;
3278 else if (rc == -ENOENT)
3279 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
3280 else if (rc == -EPERM)
3281 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
3282 else if (rc == -EBUSY)
3283 rsp->hdr.Status = STATUS_DELETE_PENDING;
3284 else if (rc == -EBADF)
3285 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
3286 else if (rc == -ENOEXEC)
3287 rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
3288 else if (rc == -ENXIO)
3289 rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
3290 else if (rc == -EEXIST)
3291 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
3292 else if (rc == -EMFILE)
3293 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
3294 if (!rsp->hdr.Status)
3295 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
3296
3297 if (fp)
3298 ksmbd_fd_put(work, fp);
3299 smb2_set_err_rsp(work);
3300 ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
3301 }
3302
3303 kfree(name);
3304 kfree(lc);
3305
3306 return 0;
3307 }
3308
readdir_info_level_struct_sz(int info_level)3309 static int readdir_info_level_struct_sz(int info_level)
3310 {
3311 switch (info_level) {
3312 case FILE_FULL_DIRECTORY_INFORMATION:
3313 return sizeof(struct file_full_directory_info);
3314 case FILE_BOTH_DIRECTORY_INFORMATION:
3315 return sizeof(struct file_both_directory_info);
3316 case FILE_DIRECTORY_INFORMATION:
3317 return sizeof(struct file_directory_info);
3318 case FILE_NAMES_INFORMATION:
3319 return sizeof(struct file_names_info);
3320 case FILEID_FULL_DIRECTORY_INFORMATION:
3321 return sizeof(struct file_id_full_dir_info);
3322 case FILEID_BOTH_DIRECTORY_INFORMATION:
3323 return sizeof(struct file_id_both_directory_info);
3324 case SMB_FIND_FILE_POSIX_INFO:
3325 return sizeof(struct smb2_posix_info);
3326 default:
3327 return -EOPNOTSUPP;
3328 }
3329 }
3330
dentry_name(struct ksmbd_dir_info * d_info,int info_level)3331 static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
3332 {
3333 switch (info_level) {
3334 case FILE_FULL_DIRECTORY_INFORMATION:
3335 {
3336 struct file_full_directory_info *ffdinfo;
3337
3338 ffdinfo = (struct file_full_directory_info *)d_info->rptr;
3339 d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
3340 d_info->name = ffdinfo->FileName;
3341 d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
3342 return 0;
3343 }
3344 case FILE_BOTH_DIRECTORY_INFORMATION:
3345 {
3346 struct file_both_directory_info *fbdinfo;
3347
3348 fbdinfo = (struct file_both_directory_info *)d_info->rptr;
3349 d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
3350 d_info->name = fbdinfo->FileName;
3351 d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
3352 return 0;
3353 }
3354 case FILE_DIRECTORY_INFORMATION:
3355 {
3356 struct file_directory_info *fdinfo;
3357
3358 fdinfo = (struct file_directory_info *)d_info->rptr;
3359 d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
3360 d_info->name = fdinfo->FileName;
3361 d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
3362 return 0;
3363 }
3364 case FILE_NAMES_INFORMATION:
3365 {
3366 struct file_names_info *fninfo;
3367
3368 fninfo = (struct file_names_info *)d_info->rptr;
3369 d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
3370 d_info->name = fninfo->FileName;
3371 d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
3372 return 0;
3373 }
3374 case FILEID_FULL_DIRECTORY_INFORMATION:
3375 {
3376 struct file_id_full_dir_info *dinfo;
3377
3378 dinfo = (struct file_id_full_dir_info *)d_info->rptr;
3379 d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
3380 d_info->name = dinfo->FileName;
3381 d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
3382 return 0;
3383 }
3384 case FILEID_BOTH_DIRECTORY_INFORMATION:
3385 {
3386 struct file_id_both_directory_info *fibdinfo;
3387
3388 fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
3389 d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
3390 d_info->name = fibdinfo->FileName;
3391 d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
3392 return 0;
3393 }
3394 case SMB_FIND_FILE_POSIX_INFO:
3395 {
3396 struct smb2_posix_info *posix_info;
3397
3398 posix_info = (struct smb2_posix_info *)d_info->rptr;
3399 d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
3400 d_info->name = posix_info->name;
3401 d_info->name_len = le32_to_cpu(posix_info->name_len);
3402 return 0;
3403 }
3404 default:
3405 return -EINVAL;
3406 }
3407 }
3408
3409 /**
3410 * smb2_populate_readdir_entry() - encode directory entry in smb2 response
3411 * buffer
3412 * @conn: connection instance
3413 * @info_level: smb information level
3414 * @d_info: structure included variables for query dir
3415 * @ksmbd_kstat: ksmbd wrapper of dirent stat information
3416 *
3417 * if directory has many entries, find first can't read it fully.
3418 * find next might be called multiple times to read remaining dir entries
3419 *
3420 * Return: 0 on success, otherwise error
3421 */
smb2_populate_readdir_entry(struct ksmbd_conn * conn,int info_level,struct ksmbd_dir_info * d_info,struct ksmbd_kstat * ksmbd_kstat)3422 static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
3423 struct ksmbd_dir_info *d_info,
3424 struct ksmbd_kstat *ksmbd_kstat)
3425 {
3426 int next_entry_offset = 0;
3427 char *conv_name;
3428 int conv_len;
3429 void *kstat;
3430 int struct_sz, rc = 0;
3431
3432 conv_name = ksmbd_convert_dir_info_name(d_info,
3433 conn->local_nls,
3434 &conv_len);
3435 if (!conv_name)
3436 return -ENOMEM;
3437
3438 /* Somehow the name has only terminating NULL bytes */
3439 if (conv_len < 0) {
3440 rc = -EINVAL;
3441 goto free_conv_name;
3442 }
3443
3444 struct_sz = readdir_info_level_struct_sz(info_level) - 1 + conv_len;
3445 next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
3446 d_info->last_entry_off_align = next_entry_offset - struct_sz;
3447
3448 if (next_entry_offset > d_info->out_buf_len) {
3449 d_info->out_buf_len = 0;
3450 rc = -ENOSPC;
3451 goto free_conv_name;
3452 }
3453
3454 kstat = d_info->wptr;
3455 if (info_level != FILE_NAMES_INFORMATION)
3456 kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
3457
3458 switch (info_level) {
3459 case FILE_FULL_DIRECTORY_INFORMATION:
3460 {
3461 struct file_full_directory_info *ffdinfo;
3462
3463 ffdinfo = (struct file_full_directory_info *)kstat;
3464 ffdinfo->FileNameLength = cpu_to_le32(conv_len);
3465 ffdinfo->EaSize =
3466 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3467 if (ffdinfo->EaSize)
3468 ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3469 if (d_info->hide_dot_file && d_info->name[0] == '.')
3470 ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3471 memcpy(ffdinfo->FileName, conv_name, conv_len);
3472 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3473 break;
3474 }
3475 case FILE_BOTH_DIRECTORY_INFORMATION:
3476 {
3477 struct file_both_directory_info *fbdinfo;
3478
3479 fbdinfo = (struct file_both_directory_info *)kstat;
3480 fbdinfo->FileNameLength = cpu_to_le32(conv_len);
3481 fbdinfo->EaSize =
3482 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3483 if (fbdinfo->EaSize)
3484 fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3485 fbdinfo->ShortNameLength = 0;
3486 fbdinfo->Reserved = 0;
3487 if (d_info->hide_dot_file && d_info->name[0] == '.')
3488 fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3489 memcpy(fbdinfo->FileName, conv_name, conv_len);
3490 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3491 break;
3492 }
3493 case FILE_DIRECTORY_INFORMATION:
3494 {
3495 struct file_directory_info *fdinfo;
3496
3497 fdinfo = (struct file_directory_info *)kstat;
3498 fdinfo->FileNameLength = cpu_to_le32(conv_len);
3499 if (d_info->hide_dot_file && d_info->name[0] == '.')
3500 fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3501 memcpy(fdinfo->FileName, conv_name, conv_len);
3502 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3503 break;
3504 }
3505 case FILE_NAMES_INFORMATION:
3506 {
3507 struct file_names_info *fninfo;
3508
3509 fninfo = (struct file_names_info *)kstat;
3510 fninfo->FileNameLength = cpu_to_le32(conv_len);
3511 memcpy(fninfo->FileName, conv_name, conv_len);
3512 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3513 break;
3514 }
3515 case FILEID_FULL_DIRECTORY_INFORMATION:
3516 {
3517 struct file_id_full_dir_info *dinfo;
3518
3519 dinfo = (struct file_id_full_dir_info *)kstat;
3520 dinfo->FileNameLength = cpu_to_le32(conv_len);
3521 dinfo->EaSize =
3522 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3523 if (dinfo->EaSize)
3524 dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3525 dinfo->Reserved = 0;
3526 dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3527 if (d_info->hide_dot_file && d_info->name[0] == '.')
3528 dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3529 memcpy(dinfo->FileName, conv_name, conv_len);
3530 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3531 break;
3532 }
3533 case FILEID_BOTH_DIRECTORY_INFORMATION:
3534 {
3535 struct file_id_both_directory_info *fibdinfo;
3536
3537 fibdinfo = (struct file_id_both_directory_info *)kstat;
3538 fibdinfo->FileNameLength = cpu_to_le32(conv_len);
3539 fibdinfo->EaSize =
3540 smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
3541 if (fibdinfo->EaSize)
3542 fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
3543 fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
3544 fibdinfo->ShortNameLength = 0;
3545 fibdinfo->Reserved = 0;
3546 fibdinfo->Reserved2 = cpu_to_le16(0);
3547 if (d_info->hide_dot_file && d_info->name[0] == '.')
3548 fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3549 memcpy(fibdinfo->FileName, conv_name, conv_len);
3550 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3551 break;
3552 }
3553 case SMB_FIND_FILE_POSIX_INFO:
3554 {
3555 struct smb2_posix_info *posix_info;
3556 u64 time;
3557
3558 posix_info = (struct smb2_posix_info *)kstat;
3559 posix_info->Ignored = 0;
3560 posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
3561 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
3562 posix_info->ChangeTime = cpu_to_le64(time);
3563 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
3564 posix_info->LastAccessTime = cpu_to_le64(time);
3565 time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
3566 posix_info->LastWriteTime = cpu_to_le64(time);
3567 posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
3568 posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
3569 posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
3570 posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
3571 posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
3572 posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
3573 posix_info->DosAttributes =
3574 S_ISDIR(ksmbd_kstat->kstat->mode) ?
3575 FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
3576 if (d_info->hide_dot_file && d_info->name[0] == '.')
3577 posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
3578 /*
3579 * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
3580 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
3581 * sub_auth(4 * 1(num_subauth)) + RID(4).
3582 */
3583 id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
3584 SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
3585 id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
3586 SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
3587 memcpy(posix_info->name, conv_name, conv_len);
3588 posix_info->name_len = cpu_to_le32(conv_len);
3589 posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
3590 break;
3591 }
3592
3593 } /* switch (info_level) */
3594
3595 d_info->last_entry_offset = d_info->data_count;
3596 d_info->data_count += next_entry_offset;
3597 d_info->out_buf_len -= next_entry_offset;
3598 d_info->wptr += next_entry_offset;
3599
3600 ksmbd_debug(SMB,
3601 "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
3602 info_level, d_info->out_buf_len,
3603 next_entry_offset, d_info->data_count);
3604
3605 free_conv_name:
3606 kfree(conv_name);
3607 return rc;
3608 }
3609
3610 struct smb2_query_dir_private {
3611 struct ksmbd_work *work;
3612 char *search_pattern;
3613 struct ksmbd_file *dir_fp;
3614
3615 struct ksmbd_dir_info *d_info;
3616 int info_level;
3617 };
3618
lock_dir(struct ksmbd_file * dir_fp)3619 static void lock_dir(struct ksmbd_file *dir_fp)
3620 {
3621 struct dentry *dir = dir_fp->filp->f_path.dentry;
3622
3623 inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
3624 }
3625
unlock_dir(struct ksmbd_file * dir_fp)3626 static void unlock_dir(struct ksmbd_file *dir_fp)
3627 {
3628 struct dentry *dir = dir_fp->filp->f_path.dentry;
3629
3630 inode_unlock(d_inode(dir));
3631 }
3632
process_query_dir_entries(struct smb2_query_dir_private * priv)3633 static int process_query_dir_entries(struct smb2_query_dir_private *priv)
3634 {
3635 struct user_namespace *user_ns = file_mnt_user_ns(priv->dir_fp->filp);
3636 struct kstat kstat;
3637 struct ksmbd_kstat ksmbd_kstat;
3638 int rc;
3639 int i;
3640
3641 for (i = 0; i < priv->d_info->num_entry; i++) {
3642 struct dentry *dent;
3643
3644 if (dentry_name(priv->d_info, priv->info_level))
3645 return -EINVAL;
3646
3647 lock_dir(priv->dir_fp);
3648 dent = lookup_one(user_ns, priv->d_info->name,
3649 priv->dir_fp->filp->f_path.dentry,
3650 priv->d_info->name_len);
3651 unlock_dir(priv->dir_fp);
3652
3653 if (IS_ERR(dent)) {
3654 ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
3655 priv->d_info->name,
3656 PTR_ERR(dent));
3657 continue;
3658 }
3659 if (unlikely(d_is_negative(dent))) {
3660 dput(dent);
3661 ksmbd_debug(SMB, "Negative dentry `%s'\n",
3662 priv->d_info->name);
3663 continue;
3664 }
3665
3666 ksmbd_kstat.kstat = &kstat;
3667 if (priv->info_level != FILE_NAMES_INFORMATION)
3668 ksmbd_vfs_fill_dentry_attrs(priv->work,
3669 user_ns,
3670 dent,
3671 &ksmbd_kstat);
3672
3673 rc = smb2_populate_readdir_entry(priv->work->conn,
3674 priv->info_level,
3675 priv->d_info,
3676 &ksmbd_kstat);
3677 dput(dent);
3678 if (rc)
3679 return rc;
3680 }
3681 return 0;
3682 }
3683
reserve_populate_dentry(struct ksmbd_dir_info * d_info,int info_level)3684 static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
3685 int info_level)
3686 {
3687 int struct_sz;
3688 int conv_len;
3689 int next_entry_offset;
3690
3691 struct_sz = readdir_info_level_struct_sz(info_level);
3692 if (struct_sz == -EOPNOTSUPP)
3693 return -EOPNOTSUPP;
3694
3695 conv_len = (d_info->name_len + 1) * 2;
3696 next_entry_offset = ALIGN(struct_sz - 1 + conv_len,
3697 KSMBD_DIR_INFO_ALIGNMENT);
3698
3699 if (next_entry_offset > d_info->out_buf_len) {
3700 d_info->out_buf_len = 0;
3701 return -ENOSPC;
3702 }
3703
3704 switch (info_level) {
3705 case FILE_FULL_DIRECTORY_INFORMATION:
3706 {
3707 struct file_full_directory_info *ffdinfo;
3708
3709 ffdinfo = (struct file_full_directory_info *)d_info->wptr;
3710 memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
3711 ffdinfo->FileName[d_info->name_len] = 0x00;
3712 ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3713 ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3714 break;
3715 }
3716 case FILE_BOTH_DIRECTORY_INFORMATION:
3717 {
3718 struct file_both_directory_info *fbdinfo;
3719
3720 fbdinfo = (struct file_both_directory_info *)d_info->wptr;
3721 memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
3722 fbdinfo->FileName[d_info->name_len] = 0x00;
3723 fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3724 fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3725 break;
3726 }
3727 case FILE_DIRECTORY_INFORMATION:
3728 {
3729 struct file_directory_info *fdinfo;
3730
3731 fdinfo = (struct file_directory_info *)d_info->wptr;
3732 memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
3733 fdinfo->FileName[d_info->name_len] = 0x00;
3734 fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3735 fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3736 break;
3737 }
3738 case FILE_NAMES_INFORMATION:
3739 {
3740 struct file_names_info *fninfo;
3741
3742 fninfo = (struct file_names_info *)d_info->wptr;
3743 memcpy(fninfo->FileName, d_info->name, d_info->name_len);
3744 fninfo->FileName[d_info->name_len] = 0x00;
3745 fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
3746 fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3747 break;
3748 }
3749 case FILEID_FULL_DIRECTORY_INFORMATION:
3750 {
3751 struct file_id_full_dir_info *dinfo;
3752
3753 dinfo = (struct file_id_full_dir_info *)d_info->wptr;
3754 memcpy(dinfo->FileName, d_info->name, d_info->name_len);
3755 dinfo->FileName[d_info->name_len] = 0x00;
3756 dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3757 dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3758 break;
3759 }
3760 case FILEID_BOTH_DIRECTORY_INFORMATION:
3761 {
3762 struct file_id_both_directory_info *fibdinfo;
3763
3764 fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
3765 memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
3766 fibdinfo->FileName[d_info->name_len] = 0x00;
3767 fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
3768 fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
3769 break;
3770 }
3771 case SMB_FIND_FILE_POSIX_INFO:
3772 {
3773 struct smb2_posix_info *posix_info;
3774
3775 posix_info = (struct smb2_posix_info *)d_info->wptr;
3776 memcpy(posix_info->name, d_info->name, d_info->name_len);
3777 posix_info->name[d_info->name_len] = 0x00;
3778 posix_info->name_len = cpu_to_le32(d_info->name_len);
3779 posix_info->NextEntryOffset =
3780 cpu_to_le32(next_entry_offset);
3781 break;
3782 }
3783 } /* switch (info_level) */
3784
3785 d_info->num_entry++;
3786 d_info->out_buf_len -= next_entry_offset;
3787 d_info->wptr += next_entry_offset;
3788 return 0;
3789 }
3790
__query_dir(struct dir_context * ctx,const char * name,int namlen,loff_t offset,u64 ino,unsigned int d_type)3791 static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
3792 loff_t offset, u64 ino, unsigned int d_type)
3793 {
3794 struct ksmbd_readdir_data *buf;
3795 struct smb2_query_dir_private *priv;
3796 struct ksmbd_dir_info *d_info;
3797 int rc;
3798
3799 buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
3800 priv = buf->private;
3801 d_info = priv->d_info;
3802
3803 /* dot and dotdot entries are already reserved */
3804 if (!strcmp(".", name) || !strcmp("..", name))
3805 return true;
3806 if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
3807 return true;
3808 if (!match_pattern(name, namlen, priv->search_pattern))
3809 return true;
3810
3811 d_info->name = name;
3812 d_info->name_len = namlen;
3813 rc = reserve_populate_dentry(d_info, priv->info_level);
3814 if (rc)
3815 return false;
3816 if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
3817 d_info->out_buf_len = 0;
3818 return true;
3819 }
3820
verify_info_level(int info_level)3821 static int verify_info_level(int info_level)
3822 {
3823 switch (info_level) {
3824 case FILE_FULL_DIRECTORY_INFORMATION:
3825 case FILE_BOTH_DIRECTORY_INFORMATION:
3826 case FILE_DIRECTORY_INFORMATION:
3827 case FILE_NAMES_INFORMATION:
3828 case FILEID_FULL_DIRECTORY_INFORMATION:
3829 case FILEID_BOTH_DIRECTORY_INFORMATION:
3830 case SMB_FIND_FILE_POSIX_INFO:
3831 break;
3832 default:
3833 return -EOPNOTSUPP;
3834 }
3835
3836 return 0;
3837 }
3838
smb2_resp_buf_len(struct ksmbd_work * work,unsigned short hdr2_len)3839 static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
3840 {
3841 int free_len;
3842
3843 free_len = (int)(work->response_sz -
3844 (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
3845 return free_len;
3846 }
3847
smb2_calc_max_out_buf_len(struct ksmbd_work * work,unsigned short hdr2_len,unsigned int out_buf_len)3848 static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
3849 unsigned short hdr2_len,
3850 unsigned int out_buf_len)
3851 {
3852 int free_len;
3853
3854 if (out_buf_len > work->conn->vals->max_trans_size)
3855 return -EINVAL;
3856
3857 free_len = smb2_resp_buf_len(work, hdr2_len);
3858 if (free_len < 0)
3859 return -EINVAL;
3860
3861 return min_t(int, out_buf_len, free_len);
3862 }
3863
smb2_query_dir(struct ksmbd_work * work)3864 int smb2_query_dir(struct ksmbd_work *work)
3865 {
3866 struct ksmbd_conn *conn = work->conn;
3867 struct smb2_query_directory_req *req;
3868 struct smb2_query_directory_rsp *rsp;
3869 struct ksmbd_share_config *share = work->tcon->share_conf;
3870 struct ksmbd_file *dir_fp = NULL;
3871 struct ksmbd_dir_info d_info;
3872 int rc = 0;
3873 char *srch_ptr = NULL;
3874 unsigned char srch_flag;
3875 int buffer_sz;
3876 struct smb2_query_dir_private query_dir_private = {NULL, };
3877
3878 WORK_BUFFERS(work, req, rsp);
3879
3880 if (ksmbd_override_fsids(work)) {
3881 rsp->hdr.Status = STATUS_NO_MEMORY;
3882 smb2_set_err_rsp(work);
3883 return -ENOMEM;
3884 }
3885
3886 rc = verify_info_level(req->FileInformationClass);
3887 if (rc) {
3888 rc = -EFAULT;
3889 goto err_out2;
3890 }
3891
3892 dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
3893 if (!dir_fp) {
3894 rc = -EBADF;
3895 goto err_out2;
3896 }
3897
3898 if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
3899 inode_permission(file_mnt_user_ns(dir_fp->filp),
3900 file_inode(dir_fp->filp),
3901 MAY_READ | MAY_EXEC)) {
3902 pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
3903 rc = -EACCES;
3904 goto err_out2;
3905 }
3906
3907 if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
3908 pr_err("can't do query dir for a file\n");
3909 rc = -EINVAL;
3910 goto err_out2;
3911 }
3912
3913 srch_flag = req->Flags;
3914 srch_ptr = smb_strndup_from_utf16(req->Buffer,
3915 le16_to_cpu(req->FileNameLength), 1,
3916 conn->local_nls);
3917 if (IS_ERR(srch_ptr)) {
3918 ksmbd_debug(SMB, "Search Pattern not found\n");
3919 rc = -EINVAL;
3920 goto err_out2;
3921 } else {
3922 ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
3923 }
3924
3925 if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
3926 ksmbd_debug(SMB, "Restart directory scan\n");
3927 generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
3928 }
3929
3930 memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
3931 d_info.wptr = (char *)rsp->Buffer;
3932 d_info.rptr = (char *)rsp->Buffer;
3933 d_info.out_buf_len =
3934 smb2_calc_max_out_buf_len(work, 8,
3935 le32_to_cpu(req->OutputBufferLength));
3936 if (d_info.out_buf_len < 0) {
3937 rc = -EINVAL;
3938 goto err_out;
3939 }
3940 d_info.flags = srch_flag;
3941
3942 /*
3943 * reserve dot and dotdot entries in head of buffer
3944 * in first response
3945 */
3946 rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
3947 dir_fp, &d_info, srch_ptr,
3948 smb2_populate_readdir_entry);
3949 if (rc == -ENOSPC)
3950 rc = 0;
3951 else if (rc)
3952 goto err_out;
3953
3954 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
3955 d_info.hide_dot_file = true;
3956
3957 buffer_sz = d_info.out_buf_len;
3958 d_info.rptr = d_info.wptr;
3959 query_dir_private.work = work;
3960 query_dir_private.search_pattern = srch_ptr;
3961 query_dir_private.dir_fp = dir_fp;
3962 query_dir_private.d_info = &d_info;
3963 query_dir_private.info_level = req->FileInformationClass;
3964 dir_fp->readdir_data.private = &query_dir_private;
3965 set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
3966
3967 rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
3968 /*
3969 * req->OutputBufferLength is too small to contain even one entry.
3970 * In this case, it immediately returns OutputBufferLength 0 to client.
3971 */
3972 if (!d_info.out_buf_len && !d_info.num_entry)
3973 goto no_buf_len;
3974 if (rc > 0 || rc == -ENOSPC)
3975 rc = 0;
3976 else if (rc)
3977 goto err_out;
3978
3979 d_info.wptr = d_info.rptr;
3980 d_info.out_buf_len = buffer_sz;
3981 rc = process_query_dir_entries(&query_dir_private);
3982 if (rc)
3983 goto err_out;
3984
3985 if (!d_info.data_count && d_info.out_buf_len >= 0) {
3986 if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
3987 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
3988 } else {
3989 dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
3990 rsp->hdr.Status = STATUS_NO_MORE_FILES;
3991 }
3992 rsp->StructureSize = cpu_to_le16(9);
3993 rsp->OutputBufferOffset = cpu_to_le16(0);
3994 rsp->OutputBufferLength = cpu_to_le32(0);
3995 rsp->Buffer[0] = 0;
3996 inc_rfc1001_len(work->response_buf, 9);
3997 } else {
3998 no_buf_len:
3999 ((struct file_directory_info *)
4000 ((char *)rsp->Buffer + d_info.last_entry_offset))
4001 ->NextEntryOffset = 0;
4002 if (d_info.data_count >= d_info.last_entry_off_align)
4003 d_info.data_count -= d_info.last_entry_off_align;
4004
4005 rsp->StructureSize = cpu_to_le16(9);
4006 rsp->OutputBufferOffset = cpu_to_le16(72);
4007 rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
4008 inc_rfc1001_len(work->response_buf, 8 + d_info.data_count);
4009 }
4010
4011 kfree(srch_ptr);
4012 ksmbd_fd_put(work, dir_fp);
4013 ksmbd_revert_fsids(work);
4014 return 0;
4015
4016 err_out:
4017 pr_err("error while processing smb2 query dir rc = %d\n", rc);
4018 kfree(srch_ptr);
4019
4020 err_out2:
4021 if (rc == -EINVAL)
4022 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
4023 else if (rc == -EACCES)
4024 rsp->hdr.Status = STATUS_ACCESS_DENIED;
4025 else if (rc == -ENOENT)
4026 rsp->hdr.Status = STATUS_NO_SUCH_FILE;
4027 else if (rc == -EBADF)
4028 rsp->hdr.Status = STATUS_FILE_CLOSED;
4029 else if (rc == -ENOMEM)
4030 rsp->hdr.Status = STATUS_NO_MEMORY;
4031 else if (rc == -EFAULT)
4032 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
4033 else if (rc == -EIO)
4034 rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
4035 if (!rsp->hdr.Status)
4036 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
4037
4038 smb2_set_err_rsp(work);
4039 ksmbd_fd_put(work, dir_fp);
4040 ksmbd_revert_fsids(work);
4041 return 0;
4042 }
4043
4044 /**
4045 * buffer_check_err() - helper function to check buffer errors
4046 * @reqOutputBufferLength: max buffer length expected in command response
4047 * @rsp: query info response buffer contains output buffer length
4048 * @rsp_org: base response buffer pointer in case of chained response
4049 * @infoclass_size: query info class response buffer size
4050 *
4051 * Return: 0 on success, otherwise error
4052 */
buffer_check_err(int reqOutputBufferLength,struct smb2_query_info_rsp * rsp,void * rsp_org,int infoclass_size)4053 static int buffer_check_err(int reqOutputBufferLength,
4054 struct smb2_query_info_rsp *rsp,
4055 void *rsp_org, int infoclass_size)
4056 {
4057 if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
4058 if (reqOutputBufferLength < infoclass_size) {
4059 pr_err("Invalid Buffer Size Requested\n");
4060 rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
4061 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
4062 return -EINVAL;
4063 }
4064
4065 ksmbd_debug(SMB, "Buffer Overflow\n");
4066 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
4067 *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr) +
4068 reqOutputBufferLength);
4069 rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength);
4070 }
4071 return 0;
4072 }
4073
get_standard_info_pipe(struct smb2_query_info_rsp * rsp,void * rsp_org)4074 static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
4075 void *rsp_org)
4076 {
4077 struct smb2_file_standard_info *sinfo;
4078
4079 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4080
4081 sinfo->AllocationSize = cpu_to_le64(4096);
4082 sinfo->EndOfFile = cpu_to_le64(0);
4083 sinfo->NumberOfLinks = cpu_to_le32(1);
4084 sinfo->DeletePending = 1;
4085 sinfo->Directory = 0;
4086 rsp->OutputBufferLength =
4087 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4088 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_standard_info));
4089 }
4090
get_internal_info_pipe(struct smb2_query_info_rsp * rsp,u64 num,void * rsp_org)4091 static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
4092 void *rsp_org)
4093 {
4094 struct smb2_file_internal_info *file_info;
4095
4096 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4097
4098 /* any unique number */
4099 file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
4100 rsp->OutputBufferLength =
4101 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4102 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4103 }
4104
smb2_get_info_file_pipe(struct ksmbd_session * sess,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp,void * rsp_org)4105 static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
4106 struct smb2_query_info_req *req,
4107 struct smb2_query_info_rsp *rsp,
4108 void *rsp_org)
4109 {
4110 u64 id;
4111 int rc;
4112
4113 /*
4114 * Windows can sometime send query file info request on
4115 * pipe without opening it, checking error condition here
4116 */
4117 id = req->VolatileFileId;
4118 if (!ksmbd_session_rpc_method(sess, id))
4119 return -ENOENT;
4120
4121 ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
4122 req->FileInfoClass, req->VolatileFileId);
4123
4124 switch (req->FileInfoClass) {
4125 case FILE_STANDARD_INFORMATION:
4126 get_standard_info_pipe(rsp, rsp_org);
4127 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4128 rsp, rsp_org,
4129 FILE_STANDARD_INFORMATION_SIZE);
4130 break;
4131 case FILE_INTERNAL_INFORMATION:
4132 get_internal_info_pipe(rsp, id, rsp_org);
4133 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4134 rsp, rsp_org,
4135 FILE_INTERNAL_INFORMATION_SIZE);
4136 break;
4137 default:
4138 ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
4139 req->FileInfoClass);
4140 rc = -EOPNOTSUPP;
4141 }
4142 return rc;
4143 }
4144
4145 /**
4146 * smb2_get_ea() - handler for smb2 get extended attribute command
4147 * @work: smb work containing query info command buffer
4148 * @fp: ksmbd_file pointer
4149 * @req: get extended attribute request
4150 * @rsp: response buffer pointer
4151 * @rsp_org: base response buffer pointer in case of chained response
4152 *
4153 * Return: 0 on success, otherwise error
4154 */
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)4155 static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
4156 struct smb2_query_info_req *req,
4157 struct smb2_query_info_rsp *rsp, void *rsp_org)
4158 {
4159 struct smb2_ea_info *eainfo, *prev_eainfo;
4160 char *name, *ptr, *xattr_list = NULL, *buf;
4161 int rc, name_len, value_len, xattr_list_len, idx;
4162 ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
4163 struct smb2_ea_info_req *ea_req = NULL;
4164 const struct path *path;
4165 struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4166
4167 if (!(fp->daccess & FILE_READ_EA_LE)) {
4168 pr_err("Not permitted to read ext attr : 0x%x\n",
4169 fp->daccess);
4170 return -EACCES;
4171 }
4172
4173 path = &fp->filp->f_path;
4174 /* single EA entry is requested with given user.* name */
4175 if (req->InputBufferLength) {
4176 if (le32_to_cpu(req->InputBufferLength) <
4177 sizeof(struct smb2_ea_info_req))
4178 return -EINVAL;
4179
4180 ea_req = (struct smb2_ea_info_req *)req->Buffer;
4181 } else {
4182 /* need to send all EAs, if no specific EA is requested*/
4183 if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
4184 ksmbd_debug(SMB,
4185 "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
4186 le32_to_cpu(req->Flags));
4187 }
4188
4189 buf_free_len =
4190 smb2_calc_max_out_buf_len(work, 8,
4191 le32_to_cpu(req->OutputBufferLength));
4192 if (buf_free_len < 0)
4193 return -EINVAL;
4194
4195 rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4196 if (rc < 0) {
4197 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4198 goto out;
4199 } else if (!rc) { /* there is no EA in the file */
4200 ksmbd_debug(SMB, "no ea data in the file\n");
4201 goto done;
4202 }
4203 xattr_list_len = rc;
4204
4205 ptr = (char *)rsp->Buffer;
4206 eainfo = (struct smb2_ea_info *)ptr;
4207 prev_eainfo = eainfo;
4208 idx = 0;
4209
4210 while (idx < xattr_list_len) {
4211 name = xattr_list + idx;
4212 name_len = strlen(name);
4213
4214 ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
4215 idx += name_len + 1;
4216
4217 /*
4218 * CIFS does not support EA other than user.* namespace,
4219 * still keep the framework generic, to list other attrs
4220 * in future.
4221 */
4222 if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4223 continue;
4224
4225 if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
4226 STREAM_PREFIX_LEN))
4227 continue;
4228
4229 if (req->InputBufferLength &&
4230 strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
4231 ea_req->EaNameLength))
4232 continue;
4233
4234 if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
4235 DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
4236 continue;
4237
4238 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4239 name_len -= XATTR_USER_PREFIX_LEN;
4240
4241 ptr = (char *)(&eainfo->name + name_len + 1);
4242 buf_free_len -= (offsetof(struct smb2_ea_info, name) +
4243 name_len + 1);
4244 /* bailout if xattr can't fit in buf_free_len */
4245 value_len = ksmbd_vfs_getxattr(user_ns, path->dentry,
4246 name, &buf);
4247 if (value_len <= 0) {
4248 rc = -ENOENT;
4249 rsp->hdr.Status = STATUS_INVALID_HANDLE;
4250 goto out;
4251 }
4252
4253 buf_free_len -= value_len;
4254 if (buf_free_len < 0) {
4255 kfree(buf);
4256 break;
4257 }
4258
4259 memcpy(ptr, buf, value_len);
4260 kfree(buf);
4261
4262 ptr += value_len;
4263 eainfo->Flags = 0;
4264 eainfo->EaNameLength = name_len;
4265
4266 if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4267 memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
4268 name_len);
4269 else
4270 memcpy(eainfo->name, name, name_len);
4271
4272 eainfo->name[name_len] = '\0';
4273 eainfo->EaValueLength = cpu_to_le16(value_len);
4274 next_offset = offsetof(struct smb2_ea_info, name) +
4275 name_len + 1 + value_len;
4276
4277 /* align next xattr entry at 4 byte bundary */
4278 alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
4279 if (alignment_bytes) {
4280 memset(ptr, '\0', alignment_bytes);
4281 ptr += alignment_bytes;
4282 next_offset += alignment_bytes;
4283 buf_free_len -= alignment_bytes;
4284 }
4285 eainfo->NextEntryOffset = cpu_to_le32(next_offset);
4286 prev_eainfo = eainfo;
4287 eainfo = (struct smb2_ea_info *)ptr;
4288 rsp_data_cnt += next_offset;
4289
4290 if (req->InputBufferLength) {
4291 ksmbd_debug(SMB, "single entry requested\n");
4292 break;
4293 }
4294 }
4295
4296 /* no more ea entries */
4297 prev_eainfo->NextEntryOffset = 0;
4298 done:
4299 rc = 0;
4300 if (rsp_data_cnt == 0)
4301 rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
4302 rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
4303 inc_rfc1001_len(rsp_org, rsp_data_cnt);
4304 out:
4305 kvfree(xattr_list);
4306 return rc;
4307 }
4308
get_file_access_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4309 static void get_file_access_info(struct smb2_query_info_rsp *rsp,
4310 struct ksmbd_file *fp, void *rsp_org)
4311 {
4312 struct smb2_file_access_info *file_info;
4313
4314 file_info = (struct smb2_file_access_info *)rsp->Buffer;
4315 file_info->AccessFlags = fp->daccess;
4316 rsp->OutputBufferLength =
4317 cpu_to_le32(sizeof(struct smb2_file_access_info));
4318 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_access_info));
4319 }
4320
get_file_basic_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4321 static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
4322 struct ksmbd_file *fp, void *rsp_org)
4323 {
4324 struct smb2_file_basic_info *basic_info;
4325 struct kstat stat;
4326 u64 time;
4327
4328 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4329 pr_err("no right to read the attributes : 0x%x\n",
4330 fp->daccess);
4331 return -EACCES;
4332 }
4333
4334 basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
4335 generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4336 &stat);
4337 basic_info->CreationTime = cpu_to_le64(fp->create_time);
4338 time = ksmbd_UnixTimeToNT(stat.atime);
4339 basic_info->LastAccessTime = cpu_to_le64(time);
4340 time = ksmbd_UnixTimeToNT(stat.mtime);
4341 basic_info->LastWriteTime = cpu_to_le64(time);
4342 time = ksmbd_UnixTimeToNT(stat.ctime);
4343 basic_info->ChangeTime = cpu_to_le64(time);
4344 basic_info->Attributes = fp->f_ci->m_fattr;
4345 basic_info->Pad1 = 0;
4346 rsp->OutputBufferLength =
4347 cpu_to_le32(sizeof(struct smb2_file_basic_info));
4348 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_basic_info));
4349 return 0;
4350 }
4351
get_allocation_size(struct inode * inode,struct kstat * stat)4352 static unsigned long long get_allocation_size(struct inode *inode,
4353 struct kstat *stat)
4354 {
4355 unsigned long long alloc_size = 0;
4356
4357 if (!S_ISDIR(stat->mode)) {
4358 if ((inode->i_blocks << 9) <= stat->size)
4359 alloc_size = stat->size;
4360 else
4361 alloc_size = inode->i_blocks << 9;
4362 }
4363
4364 return alloc_size;
4365 }
4366
get_file_standard_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4367 static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
4368 struct ksmbd_file *fp, void *rsp_org)
4369 {
4370 struct smb2_file_standard_info *sinfo;
4371 unsigned int delete_pending;
4372 struct inode *inode;
4373 struct kstat stat;
4374
4375 inode = file_inode(fp->filp);
4376 generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4377
4378 sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
4379 delete_pending = ksmbd_inode_pending_delete(fp);
4380
4381 sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
4382 sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4383 sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
4384 sinfo->DeletePending = delete_pending;
4385 sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4386 rsp->OutputBufferLength =
4387 cpu_to_le32(sizeof(struct smb2_file_standard_info));
4388 inc_rfc1001_len(rsp_org,
4389 sizeof(struct smb2_file_standard_info));
4390 }
4391
get_file_alignment_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4392 static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
4393 void *rsp_org)
4394 {
4395 struct smb2_file_alignment_info *file_info;
4396
4397 file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
4398 file_info->AlignmentRequirement = 0;
4399 rsp->OutputBufferLength =
4400 cpu_to_le32(sizeof(struct smb2_file_alignment_info));
4401 inc_rfc1001_len(rsp_org,
4402 sizeof(struct smb2_file_alignment_info));
4403 }
4404
get_file_all_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4405 static int get_file_all_info(struct ksmbd_work *work,
4406 struct smb2_query_info_rsp *rsp,
4407 struct ksmbd_file *fp,
4408 void *rsp_org)
4409 {
4410 struct ksmbd_conn *conn = work->conn;
4411 struct smb2_file_all_info *file_info;
4412 unsigned int delete_pending;
4413 struct inode *inode;
4414 struct kstat stat;
4415 int conv_len;
4416 char *filename;
4417 u64 time;
4418
4419 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4420 ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
4421 fp->daccess);
4422 return -EACCES;
4423 }
4424
4425 filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
4426 if (IS_ERR(filename))
4427 return PTR_ERR(filename);
4428
4429 inode = file_inode(fp->filp);
4430 generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4431
4432 ksmbd_debug(SMB, "filename = %s\n", filename);
4433 delete_pending = ksmbd_inode_pending_delete(fp);
4434 file_info = (struct smb2_file_all_info *)rsp->Buffer;
4435
4436 file_info->CreationTime = cpu_to_le64(fp->create_time);
4437 time = ksmbd_UnixTimeToNT(stat.atime);
4438 file_info->LastAccessTime = cpu_to_le64(time);
4439 time = ksmbd_UnixTimeToNT(stat.mtime);
4440 file_info->LastWriteTime = cpu_to_le64(time);
4441 time = ksmbd_UnixTimeToNT(stat.ctime);
4442 file_info->ChangeTime = cpu_to_le64(time);
4443 file_info->Attributes = fp->f_ci->m_fattr;
4444 file_info->Pad1 = 0;
4445 file_info->AllocationSize =
4446 cpu_to_le64(get_allocation_size(inode, &stat));
4447 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4448 file_info->NumberOfLinks =
4449 cpu_to_le32(get_nlink(&stat) - delete_pending);
4450 file_info->DeletePending = delete_pending;
4451 file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
4452 file_info->Pad2 = 0;
4453 file_info->IndexNumber = cpu_to_le64(stat.ino);
4454 file_info->EASize = 0;
4455 file_info->AccessFlags = fp->daccess;
4456 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4457 file_info->Mode = fp->coption;
4458 file_info->AlignmentRequirement = 0;
4459 conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
4460 PATH_MAX, conn->local_nls, 0);
4461 conv_len *= 2;
4462 file_info->FileNameLength = cpu_to_le32(conv_len);
4463 rsp->OutputBufferLength =
4464 cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
4465 kfree(filename);
4466 inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4467 return 0;
4468 }
4469
get_file_alternate_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4470 static void get_file_alternate_info(struct ksmbd_work *work,
4471 struct smb2_query_info_rsp *rsp,
4472 struct ksmbd_file *fp,
4473 void *rsp_org)
4474 {
4475 struct ksmbd_conn *conn = work->conn;
4476 struct smb2_file_alt_name_info *file_info;
4477 struct dentry *dentry = fp->filp->f_path.dentry;
4478 int conv_len;
4479
4480 spin_lock(&dentry->d_lock);
4481 file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
4482 conv_len = ksmbd_extract_shortname(conn,
4483 dentry->d_name.name,
4484 file_info->FileName);
4485 spin_unlock(&dentry->d_lock);
4486 file_info->FileNameLength = cpu_to_le32(conv_len);
4487 rsp->OutputBufferLength =
4488 cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
4489 inc_rfc1001_len(rsp_org, le32_to_cpu(rsp->OutputBufferLength));
4490 }
4491
get_file_stream_info(struct ksmbd_work * work,struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4492 static void get_file_stream_info(struct ksmbd_work *work,
4493 struct smb2_query_info_rsp *rsp,
4494 struct ksmbd_file *fp,
4495 void *rsp_org)
4496 {
4497 struct ksmbd_conn *conn = work->conn;
4498 struct smb2_file_stream_info *file_info;
4499 char *stream_name, *xattr_list = NULL, *stream_buf;
4500 struct kstat stat;
4501 const struct path *path = &fp->filp->f_path;
4502 ssize_t xattr_list_len;
4503 int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
4504 int buf_free_len;
4505 struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
4506
4507 generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4508 &stat);
4509 file_info = (struct smb2_file_stream_info *)rsp->Buffer;
4510
4511 buf_free_len =
4512 smb2_calc_max_out_buf_len(work, 8,
4513 le32_to_cpu(req->OutputBufferLength));
4514 if (buf_free_len < 0)
4515 goto out;
4516
4517 xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
4518 if (xattr_list_len < 0) {
4519 goto out;
4520 } else if (!xattr_list_len) {
4521 ksmbd_debug(SMB, "empty xattr in the file\n");
4522 goto out;
4523 }
4524
4525 while (idx < xattr_list_len) {
4526 stream_name = xattr_list + idx;
4527 streamlen = strlen(stream_name);
4528 idx += streamlen + 1;
4529
4530 ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
4531
4532 if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
4533 STREAM_PREFIX, STREAM_PREFIX_LEN))
4534 continue;
4535
4536 stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
4537 STREAM_PREFIX_LEN);
4538 streamlen = stream_name_len;
4539
4540 /* plus : size */
4541 streamlen += 1;
4542 stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
4543 if (!stream_buf)
4544 break;
4545
4546 streamlen = snprintf(stream_buf, streamlen + 1,
4547 ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
4548
4549 next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
4550 if (next > buf_free_len) {
4551 kfree(stream_buf);
4552 break;
4553 }
4554
4555 file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
4556 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4557 stream_buf, streamlen,
4558 conn->local_nls, 0);
4559 streamlen *= 2;
4560 kfree(stream_buf);
4561 file_info->StreamNameLength = cpu_to_le32(streamlen);
4562 file_info->StreamSize = cpu_to_le64(stream_name_len);
4563 file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
4564
4565 nbytes += next;
4566 buf_free_len -= next;
4567 file_info->NextEntryOffset = cpu_to_le32(next);
4568 }
4569
4570 out:
4571 if (!S_ISDIR(stat.mode) &&
4572 buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
4573 file_info = (struct smb2_file_stream_info *)
4574 &rsp->Buffer[nbytes];
4575 streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
4576 "::$DATA", 7, conn->local_nls, 0);
4577 streamlen *= 2;
4578 file_info->StreamNameLength = cpu_to_le32(streamlen);
4579 file_info->StreamSize = cpu_to_le64(stat.size);
4580 file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
4581 nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
4582 }
4583
4584 /* last entry offset should be 0 */
4585 file_info->NextEntryOffset = 0;
4586 kvfree(xattr_list);
4587
4588 rsp->OutputBufferLength = cpu_to_le32(nbytes);
4589 inc_rfc1001_len(rsp_org, nbytes);
4590 }
4591
get_file_internal_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4592 static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
4593 struct ksmbd_file *fp, void *rsp_org)
4594 {
4595 struct smb2_file_internal_info *file_info;
4596 struct kstat stat;
4597
4598 generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4599 &stat);
4600 file_info = (struct smb2_file_internal_info *)rsp->Buffer;
4601 file_info->IndexNumber = cpu_to_le64(stat.ino);
4602 rsp->OutputBufferLength =
4603 cpu_to_le32(sizeof(struct smb2_file_internal_info));
4604 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_internal_info));
4605 }
4606
get_file_network_open_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4607 static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
4608 struct ksmbd_file *fp, void *rsp_org)
4609 {
4610 struct smb2_file_ntwrk_info *file_info;
4611 struct inode *inode;
4612 struct kstat stat;
4613 u64 time;
4614
4615 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4616 pr_err("no right to read the attributes : 0x%x\n",
4617 fp->daccess);
4618 return -EACCES;
4619 }
4620
4621 file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
4622
4623 inode = file_inode(fp->filp);
4624 generic_fillattr(file_mnt_user_ns(fp->filp), inode, &stat);
4625
4626 file_info->CreationTime = cpu_to_le64(fp->create_time);
4627 time = ksmbd_UnixTimeToNT(stat.atime);
4628 file_info->LastAccessTime = cpu_to_le64(time);
4629 time = ksmbd_UnixTimeToNT(stat.mtime);
4630 file_info->LastWriteTime = cpu_to_le64(time);
4631 time = ksmbd_UnixTimeToNT(stat.ctime);
4632 file_info->ChangeTime = cpu_to_le64(time);
4633 file_info->Attributes = fp->f_ci->m_fattr;
4634 file_info->AllocationSize =
4635 cpu_to_le64(get_allocation_size(inode, &stat));
4636 file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
4637 file_info->Reserved = cpu_to_le32(0);
4638 rsp->OutputBufferLength =
4639 cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
4640 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ntwrk_info));
4641 return 0;
4642 }
4643
get_file_ea_info(struct smb2_query_info_rsp * rsp,void * rsp_org)4644 static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
4645 {
4646 struct smb2_file_ea_info *file_info;
4647
4648 file_info = (struct smb2_file_ea_info *)rsp->Buffer;
4649 file_info->EASize = 0;
4650 rsp->OutputBufferLength =
4651 cpu_to_le32(sizeof(struct smb2_file_ea_info));
4652 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_ea_info));
4653 }
4654
get_file_position_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4655 static void get_file_position_info(struct smb2_query_info_rsp *rsp,
4656 struct ksmbd_file *fp, void *rsp_org)
4657 {
4658 struct smb2_file_pos_info *file_info;
4659
4660 file_info = (struct smb2_file_pos_info *)rsp->Buffer;
4661 file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
4662 rsp->OutputBufferLength =
4663 cpu_to_le32(sizeof(struct smb2_file_pos_info));
4664 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_pos_info));
4665 }
4666
get_file_mode_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4667 static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
4668 struct ksmbd_file *fp, void *rsp_org)
4669 {
4670 struct smb2_file_mode_info *file_info;
4671
4672 file_info = (struct smb2_file_mode_info *)rsp->Buffer;
4673 file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
4674 rsp->OutputBufferLength =
4675 cpu_to_le32(sizeof(struct smb2_file_mode_info));
4676 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_mode_info));
4677 }
4678
get_file_compression_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4679 static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
4680 struct ksmbd_file *fp, void *rsp_org)
4681 {
4682 struct smb2_file_comp_info *file_info;
4683 struct kstat stat;
4684
4685 generic_fillattr(file_mnt_user_ns(fp->filp), file_inode(fp->filp),
4686 &stat);
4687
4688 file_info = (struct smb2_file_comp_info *)rsp->Buffer;
4689 file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
4690 file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
4691 file_info->CompressionUnitShift = 0;
4692 file_info->ChunkShift = 0;
4693 file_info->ClusterShift = 0;
4694 memset(&file_info->Reserved[0], 0, 3);
4695
4696 rsp->OutputBufferLength =
4697 cpu_to_le32(sizeof(struct smb2_file_comp_info));
4698 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_comp_info));
4699 }
4700
get_file_attribute_tag_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4701 static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
4702 struct ksmbd_file *fp, void *rsp_org)
4703 {
4704 struct smb2_file_attr_tag_info *file_info;
4705
4706 if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
4707 pr_err("no right to read the attributes : 0x%x\n",
4708 fp->daccess);
4709 return -EACCES;
4710 }
4711
4712 file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
4713 file_info->FileAttributes = fp->f_ci->m_fattr;
4714 file_info->ReparseTag = 0;
4715 rsp->OutputBufferLength =
4716 cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
4717 inc_rfc1001_len(rsp_org, sizeof(struct smb2_file_attr_tag_info));
4718 return 0;
4719 }
4720
find_file_posix_info(struct smb2_query_info_rsp * rsp,struct ksmbd_file * fp,void * rsp_org)4721 static int find_file_posix_info(struct smb2_query_info_rsp *rsp,
4722 struct ksmbd_file *fp, void *rsp_org)
4723 {
4724 struct smb311_posix_qinfo *file_info;
4725 struct inode *inode = file_inode(fp->filp);
4726 struct user_namespace *user_ns = file_mnt_user_ns(fp->filp);
4727 vfsuid_t vfsuid = i_uid_into_vfsuid(user_ns, inode);
4728 vfsgid_t vfsgid = i_gid_into_vfsgid(user_ns, inode);
4729 u64 time;
4730 int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
4731
4732 file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
4733 file_info->CreationTime = cpu_to_le64(fp->create_time);
4734 time = ksmbd_UnixTimeToNT(inode->i_atime);
4735 file_info->LastAccessTime = cpu_to_le64(time);
4736 time = ksmbd_UnixTimeToNT(inode->i_mtime);
4737 file_info->LastWriteTime = cpu_to_le64(time);
4738 time = ksmbd_UnixTimeToNT(inode->i_ctime);
4739 file_info->ChangeTime = cpu_to_le64(time);
4740 file_info->DosAttributes = fp->f_ci->m_fattr;
4741 file_info->Inode = cpu_to_le64(inode->i_ino);
4742 file_info->EndOfFile = cpu_to_le64(inode->i_size);
4743 file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
4744 file_info->HardLinks = cpu_to_le32(inode->i_nlink);
4745 file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
4746 file_info->DeviceId = cpu_to_le32(inode->i_rdev);
4747
4748 /*
4749 * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
4750 * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
4751 * sub_auth(4 * 1(num_subauth)) + RID(4).
4752 */
4753 id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
4754 SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
4755 id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
4756 SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
4757
4758 rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
4759 inc_rfc1001_len(rsp_org, out_buf_len);
4760 return out_buf_len;
4761 }
4762
smb2_get_info_file(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)4763 static int smb2_get_info_file(struct ksmbd_work *work,
4764 struct smb2_query_info_req *req,
4765 struct smb2_query_info_rsp *rsp)
4766 {
4767 struct ksmbd_file *fp;
4768 int fileinfoclass = 0;
4769 int rc = 0;
4770 int file_infoclass_size;
4771 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
4772
4773 if (test_share_config_flag(work->tcon->share_conf,
4774 KSMBD_SHARE_FLAG_PIPE)) {
4775 /* smb2 info file called for pipe */
4776 return smb2_get_info_file_pipe(work->sess, req, rsp,
4777 work->response_buf);
4778 }
4779
4780 if (work->next_smb2_rcv_hdr_off) {
4781 if (!has_file_id(req->VolatileFileId)) {
4782 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
4783 work->compound_fid);
4784 id = work->compound_fid;
4785 pid = work->compound_pfid;
4786 }
4787 }
4788
4789 if (!has_file_id(id)) {
4790 id = req->VolatileFileId;
4791 pid = req->PersistentFileId;
4792 }
4793
4794 fp = ksmbd_lookup_fd_slow(work, id, pid);
4795 if (!fp)
4796 return -ENOENT;
4797
4798 fileinfoclass = req->FileInfoClass;
4799
4800 switch (fileinfoclass) {
4801 case FILE_ACCESS_INFORMATION:
4802 get_file_access_info(rsp, fp, work->response_buf);
4803 file_infoclass_size = FILE_ACCESS_INFORMATION_SIZE;
4804 break;
4805
4806 case FILE_BASIC_INFORMATION:
4807 rc = get_file_basic_info(rsp, fp, work->response_buf);
4808 file_infoclass_size = FILE_BASIC_INFORMATION_SIZE;
4809 break;
4810
4811 case FILE_STANDARD_INFORMATION:
4812 get_file_standard_info(rsp, fp, work->response_buf);
4813 file_infoclass_size = FILE_STANDARD_INFORMATION_SIZE;
4814 break;
4815
4816 case FILE_ALIGNMENT_INFORMATION:
4817 get_file_alignment_info(rsp, work->response_buf);
4818 file_infoclass_size = FILE_ALIGNMENT_INFORMATION_SIZE;
4819 break;
4820
4821 case FILE_ALL_INFORMATION:
4822 rc = get_file_all_info(work, rsp, fp, work->response_buf);
4823 file_infoclass_size = FILE_ALL_INFORMATION_SIZE;
4824 break;
4825
4826 case FILE_ALTERNATE_NAME_INFORMATION:
4827 get_file_alternate_info(work, rsp, fp, work->response_buf);
4828 file_infoclass_size = FILE_ALTERNATE_NAME_INFORMATION_SIZE;
4829 break;
4830
4831 case FILE_STREAM_INFORMATION:
4832 get_file_stream_info(work, rsp, fp, work->response_buf);
4833 file_infoclass_size = FILE_STREAM_INFORMATION_SIZE;
4834 break;
4835
4836 case FILE_INTERNAL_INFORMATION:
4837 get_file_internal_info(rsp, fp, work->response_buf);
4838 file_infoclass_size = FILE_INTERNAL_INFORMATION_SIZE;
4839 break;
4840
4841 case FILE_NETWORK_OPEN_INFORMATION:
4842 rc = get_file_network_open_info(rsp, fp, work->response_buf);
4843 file_infoclass_size = FILE_NETWORK_OPEN_INFORMATION_SIZE;
4844 break;
4845
4846 case FILE_EA_INFORMATION:
4847 get_file_ea_info(rsp, work->response_buf);
4848 file_infoclass_size = FILE_EA_INFORMATION_SIZE;
4849 break;
4850
4851 case FILE_FULL_EA_INFORMATION:
4852 rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
4853 file_infoclass_size = FILE_FULL_EA_INFORMATION_SIZE;
4854 break;
4855
4856 case FILE_POSITION_INFORMATION:
4857 get_file_position_info(rsp, fp, work->response_buf);
4858 file_infoclass_size = FILE_POSITION_INFORMATION_SIZE;
4859 break;
4860
4861 case FILE_MODE_INFORMATION:
4862 get_file_mode_info(rsp, fp, work->response_buf);
4863 file_infoclass_size = FILE_MODE_INFORMATION_SIZE;
4864 break;
4865
4866 case FILE_COMPRESSION_INFORMATION:
4867 get_file_compression_info(rsp, fp, work->response_buf);
4868 file_infoclass_size = FILE_COMPRESSION_INFORMATION_SIZE;
4869 break;
4870
4871 case FILE_ATTRIBUTE_TAG_INFORMATION:
4872 rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
4873 file_infoclass_size = FILE_ATTRIBUTE_TAG_INFORMATION_SIZE;
4874 break;
4875 case SMB_FIND_FILE_POSIX_INFO:
4876 if (!work->tcon->posix_extensions) {
4877 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
4878 rc = -EOPNOTSUPP;
4879 } else {
4880 file_infoclass_size = find_file_posix_info(rsp, fp,
4881 work->response_buf);
4882 }
4883 break;
4884 default:
4885 ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
4886 fileinfoclass);
4887 rc = -EOPNOTSUPP;
4888 }
4889 if (!rc)
4890 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
4891 rsp, work->response_buf,
4892 file_infoclass_size);
4893 ksmbd_fd_put(work, fp);
4894 return rc;
4895 }
4896
smb2_get_info_filesystem(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)4897 static int smb2_get_info_filesystem(struct ksmbd_work *work,
4898 struct smb2_query_info_req *req,
4899 struct smb2_query_info_rsp *rsp)
4900 {
4901 struct ksmbd_session *sess = work->sess;
4902 struct ksmbd_conn *conn = work->conn;
4903 struct ksmbd_share_config *share = work->tcon->share_conf;
4904 int fsinfoclass = 0;
4905 struct kstatfs stfs;
4906 struct path path;
4907 int rc = 0, len;
4908 int fs_infoclass_size = 0;
4909
4910 rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
4911 if (rc) {
4912 pr_err("cannot create vfs path\n");
4913 return -EIO;
4914 }
4915
4916 rc = vfs_statfs(&path, &stfs);
4917 if (rc) {
4918 pr_err("cannot do stat of path %s\n", share->path);
4919 path_put(&path);
4920 return -EIO;
4921 }
4922
4923 fsinfoclass = req->FileInfoClass;
4924
4925 switch (fsinfoclass) {
4926 case FS_DEVICE_INFORMATION:
4927 {
4928 struct filesystem_device_info *info;
4929
4930 info = (struct filesystem_device_info *)rsp->Buffer;
4931
4932 info->DeviceType = cpu_to_le32(stfs.f_type);
4933 info->DeviceCharacteristics = cpu_to_le32(0x00000020);
4934 rsp->OutputBufferLength = cpu_to_le32(8);
4935 inc_rfc1001_len(work->response_buf, 8);
4936 fs_infoclass_size = FS_DEVICE_INFORMATION_SIZE;
4937 break;
4938 }
4939 case FS_ATTRIBUTE_INFORMATION:
4940 {
4941 struct filesystem_attribute_info *info;
4942 size_t sz;
4943
4944 info = (struct filesystem_attribute_info *)rsp->Buffer;
4945 info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
4946 FILE_PERSISTENT_ACLS |
4947 FILE_UNICODE_ON_DISK |
4948 FILE_CASE_PRESERVED_NAMES |
4949 FILE_CASE_SENSITIVE_SEARCH |
4950 FILE_SUPPORTS_BLOCK_REFCOUNTING);
4951
4952 info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
4953
4954 info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
4955 len = smbConvertToUTF16((__le16 *)info->FileSystemName,
4956 "NTFS", PATH_MAX, conn->local_nls, 0);
4957 len = len * 2;
4958 info->FileSystemNameLen = cpu_to_le32(len);
4959 sz = sizeof(struct filesystem_attribute_info) - 2 + len;
4960 rsp->OutputBufferLength = cpu_to_le32(sz);
4961 inc_rfc1001_len(work->response_buf, sz);
4962 fs_infoclass_size = FS_ATTRIBUTE_INFORMATION_SIZE;
4963 break;
4964 }
4965 case FS_VOLUME_INFORMATION:
4966 {
4967 struct filesystem_vol_info *info;
4968 size_t sz;
4969 unsigned int serial_crc = 0;
4970
4971 info = (struct filesystem_vol_info *)(rsp->Buffer);
4972 info->VolumeCreationTime = 0;
4973 serial_crc = crc32_le(serial_crc, share->name,
4974 strlen(share->name));
4975 serial_crc = crc32_le(serial_crc, share->path,
4976 strlen(share->path));
4977 serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
4978 strlen(ksmbd_netbios_name()));
4979 /* Taking dummy value of serial number*/
4980 info->SerialNumber = cpu_to_le32(serial_crc);
4981 len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
4982 share->name, PATH_MAX,
4983 conn->local_nls, 0);
4984 len = len * 2;
4985 info->VolumeLabelSize = cpu_to_le32(len);
4986 info->Reserved = 0;
4987 sz = sizeof(struct filesystem_vol_info) - 2 + len;
4988 rsp->OutputBufferLength = cpu_to_le32(sz);
4989 inc_rfc1001_len(work->response_buf, sz);
4990 fs_infoclass_size = FS_VOLUME_INFORMATION_SIZE;
4991 break;
4992 }
4993 case FS_SIZE_INFORMATION:
4994 {
4995 struct filesystem_info *info;
4996
4997 info = (struct filesystem_info *)(rsp->Buffer);
4998 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
4999 info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
5000 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5001 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5002 rsp->OutputBufferLength = cpu_to_le32(24);
5003 inc_rfc1001_len(work->response_buf, 24);
5004 fs_infoclass_size = FS_SIZE_INFORMATION_SIZE;
5005 break;
5006 }
5007 case FS_FULL_SIZE_INFORMATION:
5008 {
5009 struct smb2_fs_full_size_info *info;
5010
5011 info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
5012 info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
5013 info->CallerAvailableAllocationUnits =
5014 cpu_to_le64(stfs.f_bavail);
5015 info->ActualAvailableAllocationUnits =
5016 cpu_to_le64(stfs.f_bfree);
5017 info->SectorsPerAllocationUnit = cpu_to_le32(1);
5018 info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
5019 rsp->OutputBufferLength = cpu_to_le32(32);
5020 inc_rfc1001_len(work->response_buf, 32);
5021 fs_infoclass_size = FS_FULL_SIZE_INFORMATION_SIZE;
5022 break;
5023 }
5024 case FS_OBJECT_ID_INFORMATION:
5025 {
5026 struct object_id_info *info;
5027
5028 info = (struct object_id_info *)(rsp->Buffer);
5029
5030 if (!user_guest(sess->user))
5031 memcpy(info->objid, user_passkey(sess->user), 16);
5032 else
5033 memset(info->objid, 0, 16);
5034
5035 info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
5036 info->extended_info.version = cpu_to_le32(1);
5037 info->extended_info.release = cpu_to_le32(1);
5038 info->extended_info.rel_date = 0;
5039 memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
5040 rsp->OutputBufferLength = cpu_to_le32(64);
5041 inc_rfc1001_len(work->response_buf, 64);
5042 fs_infoclass_size = FS_OBJECT_ID_INFORMATION_SIZE;
5043 break;
5044 }
5045 case FS_SECTOR_SIZE_INFORMATION:
5046 {
5047 struct smb3_fs_ss_info *info;
5048 unsigned int sector_size =
5049 min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
5050
5051 info = (struct smb3_fs_ss_info *)(rsp->Buffer);
5052
5053 info->LogicalBytesPerSector = cpu_to_le32(sector_size);
5054 info->PhysicalBytesPerSectorForAtomicity =
5055 cpu_to_le32(sector_size);
5056 info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
5057 info->FSEffPhysicalBytesPerSectorForAtomicity =
5058 cpu_to_le32(sector_size);
5059 info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
5060 SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
5061 info->ByteOffsetForSectorAlignment = 0;
5062 info->ByteOffsetForPartitionAlignment = 0;
5063 rsp->OutputBufferLength = cpu_to_le32(28);
5064 inc_rfc1001_len(work->response_buf, 28);
5065 fs_infoclass_size = FS_SECTOR_SIZE_INFORMATION_SIZE;
5066 break;
5067 }
5068 case FS_CONTROL_INFORMATION:
5069 {
5070 /*
5071 * TODO : The current implementation is based on
5072 * test result with win7(NTFS) server. It's need to
5073 * modify this to get valid Quota values
5074 * from Linux kernel
5075 */
5076 struct smb2_fs_control_info *info;
5077
5078 info = (struct smb2_fs_control_info *)(rsp->Buffer);
5079 info->FreeSpaceStartFiltering = 0;
5080 info->FreeSpaceThreshold = 0;
5081 info->FreeSpaceStopFiltering = 0;
5082 info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
5083 info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
5084 info->Padding = 0;
5085 rsp->OutputBufferLength = cpu_to_le32(48);
5086 inc_rfc1001_len(work->response_buf, 48);
5087 fs_infoclass_size = FS_CONTROL_INFORMATION_SIZE;
5088 break;
5089 }
5090 case FS_POSIX_INFORMATION:
5091 {
5092 struct filesystem_posix_info *info;
5093
5094 if (!work->tcon->posix_extensions) {
5095 pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
5096 rc = -EOPNOTSUPP;
5097 } else {
5098 info = (struct filesystem_posix_info *)(rsp->Buffer);
5099 info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
5100 info->BlockSize = cpu_to_le32(stfs.f_bsize);
5101 info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
5102 info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
5103 info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
5104 info->TotalFileNodes = cpu_to_le64(stfs.f_files);
5105 info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
5106 rsp->OutputBufferLength = cpu_to_le32(56);
5107 inc_rfc1001_len(work->response_buf, 56);
5108 fs_infoclass_size = FS_POSIX_INFORMATION_SIZE;
5109 }
5110 break;
5111 }
5112 default:
5113 path_put(&path);
5114 return -EOPNOTSUPP;
5115 }
5116 rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
5117 rsp, work->response_buf,
5118 fs_infoclass_size);
5119 path_put(&path);
5120 return rc;
5121 }
5122
smb2_get_info_sec(struct ksmbd_work * work,struct smb2_query_info_req * req,struct smb2_query_info_rsp * rsp)5123 static int smb2_get_info_sec(struct ksmbd_work *work,
5124 struct smb2_query_info_req *req,
5125 struct smb2_query_info_rsp *rsp)
5126 {
5127 struct ksmbd_file *fp;
5128 struct user_namespace *user_ns;
5129 struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
5130 struct smb_fattr fattr = {{0}};
5131 struct inode *inode;
5132 __u32 secdesclen = 0;
5133 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
5134 int addition_info = le32_to_cpu(req->AdditionalInformation);
5135 int rc = 0, ppntsd_size = 0;
5136
5137 if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
5138 PROTECTED_DACL_SECINFO |
5139 UNPROTECTED_DACL_SECINFO)) {
5140 ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
5141 addition_info);
5142
5143 pntsd->revision = cpu_to_le16(1);
5144 pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
5145 pntsd->osidoffset = 0;
5146 pntsd->gsidoffset = 0;
5147 pntsd->sacloffset = 0;
5148 pntsd->dacloffset = 0;
5149
5150 secdesclen = sizeof(struct smb_ntsd);
5151 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5152 inc_rfc1001_len(work->response_buf, secdesclen);
5153
5154 return 0;
5155 }
5156
5157 if (work->next_smb2_rcv_hdr_off) {
5158 if (!has_file_id(req->VolatileFileId)) {
5159 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
5160 work->compound_fid);
5161 id = work->compound_fid;
5162 pid = work->compound_pfid;
5163 }
5164 }
5165
5166 if (!has_file_id(id)) {
5167 id = req->VolatileFileId;
5168 pid = req->PersistentFileId;
5169 }
5170
5171 fp = ksmbd_lookup_fd_slow(work, id, pid);
5172 if (!fp)
5173 return -ENOENT;
5174
5175 user_ns = file_mnt_user_ns(fp->filp);
5176 inode = file_inode(fp->filp);
5177 ksmbd_acls_fattr(&fattr, user_ns, inode);
5178
5179 if (test_share_config_flag(work->tcon->share_conf,
5180 KSMBD_SHARE_FLAG_ACL_XATTR))
5181 ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, user_ns,
5182 fp->filp->f_path.dentry,
5183 &ppntsd);
5184
5185 /* Check if sd buffer size exceeds response buffer size */
5186 if (smb2_resp_buf_len(work, 8) > ppntsd_size)
5187 rc = build_sec_desc(user_ns, pntsd, ppntsd, ppntsd_size,
5188 addition_info, &secdesclen, &fattr);
5189 posix_acl_release(fattr.cf_acls);
5190 posix_acl_release(fattr.cf_dacls);
5191 kfree(ppntsd);
5192 ksmbd_fd_put(work, fp);
5193 if (rc)
5194 return rc;
5195
5196 rsp->OutputBufferLength = cpu_to_le32(secdesclen);
5197 inc_rfc1001_len(work->response_buf, secdesclen);
5198 return 0;
5199 }
5200
5201 /**
5202 * smb2_query_info() - handler for smb2 query info command
5203 * @work: smb work containing query info request buffer
5204 *
5205 * Return: 0 on success, otherwise error
5206 */
smb2_query_info(struct ksmbd_work * work)5207 int smb2_query_info(struct ksmbd_work *work)
5208 {
5209 struct smb2_query_info_req *req;
5210 struct smb2_query_info_rsp *rsp;
5211 int rc = 0;
5212
5213 WORK_BUFFERS(work, req, rsp);
5214
5215 ksmbd_debug(SMB, "GOT query info request\n");
5216
5217 switch (req->InfoType) {
5218 case SMB2_O_INFO_FILE:
5219 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
5220 rc = smb2_get_info_file(work, req, rsp);
5221 break;
5222 case SMB2_O_INFO_FILESYSTEM:
5223 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
5224 rc = smb2_get_info_filesystem(work, req, rsp);
5225 break;
5226 case SMB2_O_INFO_SECURITY:
5227 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
5228 rc = smb2_get_info_sec(work, req, rsp);
5229 break;
5230 default:
5231 ksmbd_debug(SMB, "InfoType %d not supported yet\n",
5232 req->InfoType);
5233 rc = -EOPNOTSUPP;
5234 }
5235
5236 if (rc < 0) {
5237 if (rc == -EACCES)
5238 rsp->hdr.Status = STATUS_ACCESS_DENIED;
5239 else if (rc == -ENOENT)
5240 rsp->hdr.Status = STATUS_FILE_CLOSED;
5241 else if (rc == -EIO)
5242 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
5243 else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
5244 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
5245 smb2_set_err_rsp(work);
5246
5247 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
5248 rc);
5249 return rc;
5250 }
5251 rsp->StructureSize = cpu_to_le16(9);
5252 rsp->OutputBufferOffset = cpu_to_le16(72);
5253 inc_rfc1001_len(work->response_buf, 8);
5254 return 0;
5255 }
5256
5257 /**
5258 * smb2_close_pipe() - handler for closing IPC pipe
5259 * @work: smb work containing close request buffer
5260 *
5261 * Return: 0
5262 */
smb2_close_pipe(struct ksmbd_work * work)5263 static noinline int smb2_close_pipe(struct ksmbd_work *work)
5264 {
5265 u64 id;
5266 struct smb2_close_req *req = smb2_get_msg(work->request_buf);
5267 struct smb2_close_rsp *rsp = smb2_get_msg(work->response_buf);
5268
5269 id = req->VolatileFileId;
5270 ksmbd_session_rpc_close(work->sess, id);
5271
5272 rsp->StructureSize = cpu_to_le16(60);
5273 rsp->Flags = 0;
5274 rsp->Reserved = 0;
5275 rsp->CreationTime = 0;
5276 rsp->LastAccessTime = 0;
5277 rsp->LastWriteTime = 0;
5278 rsp->ChangeTime = 0;
5279 rsp->AllocationSize = 0;
5280 rsp->EndOfFile = 0;
5281 rsp->Attributes = 0;
5282 inc_rfc1001_len(work->response_buf, 60);
5283 return 0;
5284 }
5285
5286 /**
5287 * smb2_close() - handler for smb2 close file command
5288 * @work: smb work containing close request buffer
5289 *
5290 * Return: 0
5291 */
smb2_close(struct ksmbd_work * work)5292 int smb2_close(struct ksmbd_work *work)
5293 {
5294 u64 volatile_id = KSMBD_NO_FID;
5295 u64 sess_id;
5296 struct smb2_close_req *req;
5297 struct smb2_close_rsp *rsp;
5298 struct ksmbd_conn *conn = work->conn;
5299 struct ksmbd_file *fp;
5300 struct inode *inode;
5301 u64 time;
5302 int err = 0;
5303
5304 WORK_BUFFERS(work, req, rsp);
5305
5306 if (test_share_config_flag(work->tcon->share_conf,
5307 KSMBD_SHARE_FLAG_PIPE)) {
5308 ksmbd_debug(SMB, "IPC pipe close request\n");
5309 return smb2_close_pipe(work);
5310 }
5311
5312 sess_id = le64_to_cpu(req->hdr.SessionId);
5313 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5314 sess_id = work->compound_sid;
5315
5316 work->compound_sid = 0;
5317 if (check_session_id(conn, sess_id)) {
5318 work->compound_sid = sess_id;
5319 } else {
5320 rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
5321 if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
5322 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
5323 err = -EBADF;
5324 goto out;
5325 }
5326
5327 if (work->next_smb2_rcv_hdr_off &&
5328 !has_file_id(req->VolatileFileId)) {
5329 if (!has_file_id(work->compound_fid)) {
5330 /* file already closed, return FILE_CLOSED */
5331 ksmbd_debug(SMB, "file already closed\n");
5332 rsp->hdr.Status = STATUS_FILE_CLOSED;
5333 err = -EBADF;
5334 goto out;
5335 } else {
5336 ksmbd_debug(SMB,
5337 "Compound request set FID = %llu:%llu\n",
5338 work->compound_fid,
5339 work->compound_pfid);
5340 volatile_id = work->compound_fid;
5341
5342 /* file closed, stored id is not valid anymore */
5343 work->compound_fid = KSMBD_NO_FID;
5344 work->compound_pfid = KSMBD_NO_FID;
5345 }
5346 } else {
5347 volatile_id = req->VolatileFileId;
5348 }
5349 ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
5350
5351 rsp->StructureSize = cpu_to_le16(60);
5352 rsp->Reserved = 0;
5353
5354 if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
5355 fp = ksmbd_lookup_fd_fast(work, volatile_id);
5356 if (!fp) {
5357 err = -ENOENT;
5358 goto out;
5359 }
5360
5361 inode = file_inode(fp->filp);
5362 rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
5363 rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
5364 cpu_to_le64(inode->i_blocks << 9);
5365 rsp->EndOfFile = cpu_to_le64(inode->i_size);
5366 rsp->Attributes = fp->f_ci->m_fattr;
5367 rsp->CreationTime = cpu_to_le64(fp->create_time);
5368 time = ksmbd_UnixTimeToNT(inode->i_atime);
5369 rsp->LastAccessTime = cpu_to_le64(time);
5370 time = ksmbd_UnixTimeToNT(inode->i_mtime);
5371 rsp->LastWriteTime = cpu_to_le64(time);
5372 time = ksmbd_UnixTimeToNT(inode->i_ctime);
5373 rsp->ChangeTime = cpu_to_le64(time);
5374 ksmbd_fd_put(work, fp);
5375 } else {
5376 rsp->Flags = 0;
5377 rsp->AllocationSize = 0;
5378 rsp->EndOfFile = 0;
5379 rsp->Attributes = 0;
5380 rsp->CreationTime = 0;
5381 rsp->LastAccessTime = 0;
5382 rsp->LastWriteTime = 0;
5383 rsp->ChangeTime = 0;
5384 }
5385
5386 err = ksmbd_close_fd(work, volatile_id);
5387 out:
5388 if (err) {
5389 if (rsp->hdr.Status == 0)
5390 rsp->hdr.Status = STATUS_FILE_CLOSED;
5391 smb2_set_err_rsp(work);
5392 } else {
5393 inc_rfc1001_len(work->response_buf, 60);
5394 }
5395
5396 return 0;
5397 }
5398
5399 /**
5400 * smb2_echo() - handler for smb2 echo(ping) command
5401 * @work: smb work containing echo request buffer
5402 *
5403 * Return: 0
5404 */
smb2_echo(struct ksmbd_work * work)5405 int smb2_echo(struct ksmbd_work *work)
5406 {
5407 struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
5408
5409 rsp->StructureSize = cpu_to_le16(4);
5410 rsp->Reserved = 0;
5411 inc_rfc1001_len(work->response_buf, 4);
5412 return 0;
5413 }
5414
smb2_rename(struct ksmbd_work * work,struct ksmbd_file * fp,struct user_namespace * user_ns,struct smb2_file_rename_info * file_info,struct nls_table * local_nls)5415 static int smb2_rename(struct ksmbd_work *work,
5416 struct ksmbd_file *fp,
5417 struct user_namespace *user_ns,
5418 struct smb2_file_rename_info *file_info,
5419 struct nls_table *local_nls)
5420 {
5421 struct ksmbd_share_config *share = fp->tcon->share_conf;
5422 char *new_name = NULL, *abs_oldname = NULL, *old_name = NULL;
5423 char *pathname = NULL;
5424 struct path path;
5425 bool file_present = true;
5426 int rc;
5427
5428 ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
5429 pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5430 if (!pathname)
5431 return -ENOMEM;
5432
5433 abs_oldname = file_path(fp->filp, pathname, PATH_MAX);
5434 if (IS_ERR(abs_oldname)) {
5435 rc = -EINVAL;
5436 goto out;
5437 }
5438 old_name = strrchr(abs_oldname, '/');
5439 if (old_name && old_name[1] != '\0') {
5440 old_name++;
5441 } else {
5442 ksmbd_debug(SMB, "can't get last component in path %s\n",
5443 abs_oldname);
5444 rc = -ENOENT;
5445 goto out;
5446 }
5447
5448 new_name = smb2_get_name(file_info->FileName,
5449 le32_to_cpu(file_info->FileNameLength),
5450 local_nls);
5451 if (IS_ERR(new_name)) {
5452 rc = PTR_ERR(new_name);
5453 goto out;
5454 }
5455
5456 if (strchr(new_name, ':')) {
5457 int s_type;
5458 char *xattr_stream_name, *stream_name = NULL;
5459 size_t xattr_stream_size;
5460 int len;
5461
5462 rc = parse_stream_name(new_name, &stream_name, &s_type);
5463 if (rc < 0)
5464 goto out;
5465
5466 len = strlen(new_name);
5467 if (len > 0 && new_name[len - 1] != '/') {
5468 pr_err("not allow base filename in rename\n");
5469 rc = -ESHARE;
5470 goto out;
5471 }
5472
5473 rc = ksmbd_vfs_xattr_stream_name(stream_name,
5474 &xattr_stream_name,
5475 &xattr_stream_size,
5476 s_type);
5477 if (rc)
5478 goto out;
5479
5480 rc = ksmbd_vfs_setxattr(user_ns,
5481 fp->filp->f_path.dentry,
5482 xattr_stream_name,
5483 NULL, 0, 0);
5484 if (rc < 0) {
5485 pr_err("failed to store stream name in xattr: %d\n",
5486 rc);
5487 rc = -EINVAL;
5488 goto out;
5489 }
5490
5491 goto out;
5492 }
5493
5494 ksmbd_debug(SMB, "new name %s\n", new_name);
5495 rc = ksmbd_vfs_kern_path(work, new_name, LOOKUP_NO_SYMLINKS, &path, 1);
5496 if (rc) {
5497 if (rc != -ENOENT)
5498 goto out;
5499 file_present = false;
5500 } else {
5501 path_put(&path);
5502 }
5503
5504 if (ksmbd_share_veto_filename(share, new_name)) {
5505 rc = -ENOENT;
5506 ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
5507 goto out;
5508 }
5509
5510 if (file_info->ReplaceIfExists) {
5511 if (file_present) {
5512 rc = ksmbd_vfs_remove_file(work, new_name);
5513 if (rc) {
5514 if (rc != -ENOTEMPTY)
5515 rc = -EINVAL;
5516 ksmbd_debug(SMB, "cannot delete %s, rc %d\n",
5517 new_name, rc);
5518 goto out;
5519 }
5520 }
5521 } else {
5522 if (file_present &&
5523 strncmp(old_name, path.dentry->d_name.name, strlen(old_name))) {
5524 rc = -EEXIST;
5525 ksmbd_debug(SMB,
5526 "cannot rename already existing file\n");
5527 goto out;
5528 }
5529 }
5530
5531 rc = ksmbd_vfs_fp_rename(work, fp, new_name);
5532 out:
5533 kfree(pathname);
5534 if (!IS_ERR(new_name))
5535 kfree(new_name);
5536 return rc;
5537 }
5538
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)5539 static int smb2_create_link(struct ksmbd_work *work,
5540 struct ksmbd_share_config *share,
5541 struct smb2_file_link_info *file_info,
5542 unsigned int buf_len, struct file *filp,
5543 struct nls_table *local_nls)
5544 {
5545 char *link_name = NULL, *target_name = NULL, *pathname = NULL;
5546 struct path path;
5547 bool file_present = true;
5548 int rc;
5549
5550 if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
5551 le32_to_cpu(file_info->FileNameLength))
5552 return -EINVAL;
5553
5554 ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
5555 pathname = kmalloc(PATH_MAX, GFP_KERNEL);
5556 if (!pathname)
5557 return -ENOMEM;
5558
5559 link_name = smb2_get_name(file_info->FileName,
5560 le32_to_cpu(file_info->FileNameLength),
5561 local_nls);
5562 if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
5563 rc = -EINVAL;
5564 goto out;
5565 }
5566
5567 ksmbd_debug(SMB, "link name is %s\n", link_name);
5568 target_name = file_path(filp, pathname, PATH_MAX);
5569 if (IS_ERR(target_name)) {
5570 rc = -EINVAL;
5571 goto out;
5572 }
5573
5574 ksmbd_debug(SMB, "target name is %s\n", target_name);
5575 rc = ksmbd_vfs_kern_path(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0);
5576 if (rc) {
5577 if (rc != -ENOENT)
5578 goto out;
5579 file_present = false;
5580 } else {
5581 path_put(&path);
5582 }
5583
5584 if (file_info->ReplaceIfExists) {
5585 if (file_present) {
5586 rc = ksmbd_vfs_remove_file(work, link_name);
5587 if (rc) {
5588 rc = -EINVAL;
5589 ksmbd_debug(SMB, "cannot delete %s\n",
5590 link_name);
5591 goto out;
5592 }
5593 }
5594 } else {
5595 if (file_present) {
5596 rc = -EEXIST;
5597 ksmbd_debug(SMB, "link already exists\n");
5598 goto out;
5599 }
5600 }
5601
5602 rc = ksmbd_vfs_link(work, target_name, link_name);
5603 if (rc)
5604 rc = -EINVAL;
5605 out:
5606 if (!IS_ERR(link_name))
5607 kfree(link_name);
5608 kfree(pathname);
5609 return rc;
5610 }
5611
set_file_basic_info(struct ksmbd_file * fp,struct smb2_file_basic_info * file_info,struct ksmbd_share_config * share)5612 static int set_file_basic_info(struct ksmbd_file *fp,
5613 struct smb2_file_basic_info *file_info,
5614 struct ksmbd_share_config *share)
5615 {
5616 struct iattr attrs;
5617 struct file *filp;
5618 struct inode *inode;
5619 struct user_namespace *user_ns;
5620 int rc = 0;
5621
5622 if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
5623 return -EACCES;
5624
5625 attrs.ia_valid = 0;
5626 filp = fp->filp;
5627 inode = file_inode(filp);
5628 user_ns = file_mnt_user_ns(filp);
5629
5630 if (file_info->CreationTime)
5631 fp->create_time = le64_to_cpu(file_info->CreationTime);
5632
5633 if (file_info->LastAccessTime) {
5634 attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
5635 attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
5636 }
5637
5638 attrs.ia_valid |= ATTR_CTIME;
5639 if (file_info->ChangeTime)
5640 attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
5641 else
5642 attrs.ia_ctime = inode->i_ctime;
5643
5644 if (file_info->LastWriteTime) {
5645 attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
5646 attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
5647 }
5648
5649 if (file_info->Attributes) {
5650 if (!S_ISDIR(inode->i_mode) &&
5651 file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
5652 pr_err("can't change a file to a directory\n");
5653 return -EINVAL;
5654 }
5655
5656 if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
5657 fp->f_ci->m_fattr = file_info->Attributes |
5658 (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
5659 }
5660
5661 if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
5662 (file_info->CreationTime || file_info->Attributes)) {
5663 struct xattr_dos_attrib da = {0};
5664
5665 da.version = 4;
5666 da.itime = fp->itime;
5667 da.create_time = fp->create_time;
5668 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
5669 da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
5670 XATTR_DOSINFO_ITIME;
5671
5672 rc = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
5673 filp->f_path.dentry, &da);
5674 if (rc)
5675 ksmbd_debug(SMB,
5676 "failed to restore file attribute in EA\n");
5677 rc = 0;
5678 }
5679
5680 if (attrs.ia_valid) {
5681 struct dentry *dentry = filp->f_path.dentry;
5682 struct inode *inode = d_inode(dentry);
5683
5684 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
5685 return -EACCES;
5686
5687 inode_lock(inode);
5688 inode->i_ctime = attrs.ia_ctime;
5689 attrs.ia_valid &= ~ATTR_CTIME;
5690 rc = notify_change(user_ns, dentry, &attrs, NULL);
5691 inode_unlock(inode);
5692 }
5693 return rc;
5694 }
5695
set_file_allocation_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_alloc_info * file_alloc_info)5696 static int set_file_allocation_info(struct ksmbd_work *work,
5697 struct ksmbd_file *fp,
5698 struct smb2_file_alloc_info *file_alloc_info)
5699 {
5700 /*
5701 * TODO : It's working fine only when store dos attributes
5702 * is not yes. need to implement a logic which works
5703 * properly with any smb.conf option
5704 */
5705
5706 loff_t alloc_blks;
5707 struct inode *inode;
5708 int rc;
5709
5710 if (!(fp->daccess & FILE_WRITE_DATA_LE))
5711 return -EACCES;
5712
5713 alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
5714 inode = file_inode(fp->filp);
5715
5716 if (alloc_blks > inode->i_blocks) {
5717 smb_break_all_levII_oplock(work, fp, 1);
5718 rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
5719 alloc_blks * 512);
5720 if (rc && rc != -EOPNOTSUPP) {
5721 pr_err("vfs_fallocate is failed : %d\n", rc);
5722 return rc;
5723 }
5724 } else if (alloc_blks < inode->i_blocks) {
5725 loff_t size;
5726
5727 /*
5728 * Allocation size could be smaller than original one
5729 * which means allocated blocks in file should be
5730 * deallocated. use truncate to cut out it, but inode
5731 * size is also updated with truncate offset.
5732 * inode size is retained by backup inode size.
5733 */
5734 size = i_size_read(inode);
5735 rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
5736 if (rc) {
5737 pr_err("truncate failed!, err %d\n", rc);
5738 return rc;
5739 }
5740 if (size < alloc_blks * 512)
5741 i_size_write(inode, size);
5742 }
5743 return 0;
5744 }
5745
set_end_of_file_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_eof_info * file_eof_info)5746 static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5747 struct smb2_file_eof_info *file_eof_info)
5748 {
5749 loff_t newsize;
5750 struct inode *inode;
5751 int rc;
5752
5753 if (!(fp->daccess & FILE_WRITE_DATA_LE))
5754 return -EACCES;
5755
5756 newsize = le64_to_cpu(file_eof_info->EndOfFile);
5757 inode = file_inode(fp->filp);
5758
5759 /*
5760 * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
5761 * on FAT32 shared device, truncate execution time is too long
5762 * and network error could cause from windows client. because
5763 * truncate of some filesystem like FAT32 fill zero data in
5764 * truncated range.
5765 */
5766 if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
5767 ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
5768 rc = ksmbd_vfs_truncate(work, fp, newsize);
5769 if (rc) {
5770 ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
5771 if (rc != -EAGAIN)
5772 rc = -EBADF;
5773 return rc;
5774 }
5775 }
5776 return 0;
5777 }
5778
set_rename_info(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_file_rename_info * rename_info,unsigned int buf_len)5779 static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
5780 struct smb2_file_rename_info *rename_info,
5781 unsigned int buf_len)
5782 {
5783 struct user_namespace *user_ns;
5784 struct ksmbd_file *parent_fp;
5785 struct dentry *parent;
5786 struct dentry *dentry = fp->filp->f_path.dentry;
5787 int ret;
5788
5789 if (!(fp->daccess & FILE_DELETE_LE)) {
5790 pr_err("no right to delete : 0x%x\n", fp->daccess);
5791 return -EACCES;
5792 }
5793
5794 if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
5795 le32_to_cpu(rename_info->FileNameLength))
5796 return -EINVAL;
5797
5798 user_ns = file_mnt_user_ns(fp->filp);
5799 if (ksmbd_stream_fd(fp))
5800 goto next;
5801
5802 parent = dget_parent(dentry);
5803 ret = ksmbd_vfs_lock_parent(user_ns, parent, dentry);
5804 if (ret) {
5805 dput(parent);
5806 return ret;
5807 }
5808
5809 parent_fp = ksmbd_lookup_fd_inode(d_inode(parent));
5810 inode_unlock(d_inode(parent));
5811 dput(parent);
5812
5813 if (parent_fp) {
5814 if (parent_fp->daccess & FILE_DELETE_LE) {
5815 pr_err("parent dir is opened with delete access\n");
5816 ksmbd_fd_put(work, parent_fp);
5817 return -ESHARE;
5818 }
5819 ksmbd_fd_put(work, parent_fp);
5820 }
5821 next:
5822 return smb2_rename(work, fp, user_ns, rename_info,
5823 work->conn->local_nls);
5824 }
5825
set_file_disposition_info(struct ksmbd_file * fp,struct smb2_file_disposition_info * file_info)5826 static int set_file_disposition_info(struct ksmbd_file *fp,
5827 struct smb2_file_disposition_info *file_info)
5828 {
5829 struct inode *inode;
5830
5831 if (!(fp->daccess & FILE_DELETE_LE)) {
5832 pr_err("no right to delete : 0x%x\n", fp->daccess);
5833 return -EACCES;
5834 }
5835
5836 inode = file_inode(fp->filp);
5837 if (file_info->DeletePending) {
5838 if (S_ISDIR(inode->i_mode) &&
5839 ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
5840 return -EBUSY;
5841 ksmbd_set_inode_pending_delete(fp);
5842 } else {
5843 ksmbd_clear_inode_pending_delete(fp);
5844 }
5845 return 0;
5846 }
5847
set_file_position_info(struct ksmbd_file * fp,struct smb2_file_pos_info * file_info)5848 static int set_file_position_info(struct ksmbd_file *fp,
5849 struct smb2_file_pos_info *file_info)
5850 {
5851 loff_t current_byte_offset;
5852 unsigned long sector_size;
5853 struct inode *inode;
5854
5855 inode = file_inode(fp->filp);
5856 current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
5857 sector_size = inode->i_sb->s_blocksize;
5858
5859 if (current_byte_offset < 0 ||
5860 (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
5861 current_byte_offset & (sector_size - 1))) {
5862 pr_err("CurrentByteOffset is not valid : %llu\n",
5863 current_byte_offset);
5864 return -EINVAL;
5865 }
5866
5867 fp->filp->f_pos = current_byte_offset;
5868 return 0;
5869 }
5870
set_file_mode_info(struct ksmbd_file * fp,struct smb2_file_mode_info * file_info)5871 static int set_file_mode_info(struct ksmbd_file *fp,
5872 struct smb2_file_mode_info *file_info)
5873 {
5874 __le32 mode;
5875
5876 mode = file_info->Mode;
5877
5878 if ((mode & ~FILE_MODE_INFO_MASK)) {
5879 pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
5880 return -EINVAL;
5881 }
5882
5883 /*
5884 * TODO : need to implement consideration for
5885 * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
5886 */
5887 ksmbd_vfs_set_fadvise(fp->filp, mode);
5888 fp->coption = mode;
5889 return 0;
5890 }
5891
5892 /**
5893 * smb2_set_info_file() - handler for smb2 set info command
5894 * @work: smb work containing set info command buffer
5895 * @fp: ksmbd_file pointer
5896 * @req: request buffer pointer
5897 * @share: ksmbd_share_config pointer
5898 *
5899 * Return: 0 on success, otherwise error
5900 * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
5901 */
smb2_set_info_file(struct ksmbd_work * work,struct ksmbd_file * fp,struct smb2_set_info_req * req,struct ksmbd_share_config * share)5902 static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
5903 struct smb2_set_info_req *req,
5904 struct ksmbd_share_config *share)
5905 {
5906 unsigned int buf_len = le32_to_cpu(req->BufferLength);
5907
5908 switch (req->FileInfoClass) {
5909 case FILE_BASIC_INFORMATION:
5910 {
5911 if (buf_len < sizeof(struct smb2_file_basic_info))
5912 return -EINVAL;
5913
5914 return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
5915 }
5916 case FILE_ALLOCATION_INFORMATION:
5917 {
5918 if (buf_len < sizeof(struct smb2_file_alloc_info))
5919 return -EINVAL;
5920
5921 return set_file_allocation_info(work, fp,
5922 (struct smb2_file_alloc_info *)req->Buffer);
5923 }
5924 case FILE_END_OF_FILE_INFORMATION:
5925 {
5926 if (buf_len < sizeof(struct smb2_file_eof_info))
5927 return -EINVAL;
5928
5929 return set_end_of_file_info(work, fp,
5930 (struct smb2_file_eof_info *)req->Buffer);
5931 }
5932 case FILE_RENAME_INFORMATION:
5933 {
5934 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5935 ksmbd_debug(SMB,
5936 "User does not have write permission\n");
5937 return -EACCES;
5938 }
5939
5940 if (buf_len < sizeof(struct smb2_file_rename_info))
5941 return -EINVAL;
5942
5943 return set_rename_info(work, fp,
5944 (struct smb2_file_rename_info *)req->Buffer,
5945 buf_len);
5946 }
5947 case FILE_LINK_INFORMATION:
5948 {
5949 if (buf_len < sizeof(struct smb2_file_link_info))
5950 return -EINVAL;
5951
5952 return smb2_create_link(work, work->tcon->share_conf,
5953 (struct smb2_file_link_info *)req->Buffer,
5954 buf_len, fp->filp,
5955 work->conn->local_nls);
5956 }
5957 case FILE_DISPOSITION_INFORMATION:
5958 {
5959 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
5960 ksmbd_debug(SMB,
5961 "User does not have write permission\n");
5962 return -EACCES;
5963 }
5964
5965 if (buf_len < sizeof(struct smb2_file_disposition_info))
5966 return -EINVAL;
5967
5968 return set_file_disposition_info(fp,
5969 (struct smb2_file_disposition_info *)req->Buffer);
5970 }
5971 case FILE_FULL_EA_INFORMATION:
5972 {
5973 if (!(fp->daccess & FILE_WRITE_EA_LE)) {
5974 pr_err("Not permitted to write ext attr: 0x%x\n",
5975 fp->daccess);
5976 return -EACCES;
5977 }
5978
5979 if (buf_len < sizeof(struct smb2_ea_info))
5980 return -EINVAL;
5981
5982 return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
5983 buf_len, &fp->filp->f_path);
5984 }
5985 case FILE_POSITION_INFORMATION:
5986 {
5987 if (buf_len < sizeof(struct smb2_file_pos_info))
5988 return -EINVAL;
5989
5990 return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
5991 }
5992 case FILE_MODE_INFORMATION:
5993 {
5994 if (buf_len < sizeof(struct smb2_file_mode_info))
5995 return -EINVAL;
5996
5997 return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
5998 }
5999 }
6000
6001 pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
6002 return -EOPNOTSUPP;
6003 }
6004
smb2_set_info_sec(struct ksmbd_file * fp,int addition_info,char * buffer,int buf_len)6005 static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
6006 char *buffer, int buf_len)
6007 {
6008 struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
6009
6010 fp->saccess |= FILE_SHARE_DELETE_LE;
6011
6012 return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
6013 buf_len, false);
6014 }
6015
6016 /**
6017 * smb2_set_info() - handler for smb2 set info command handler
6018 * @work: smb work containing set info request buffer
6019 *
6020 * Return: 0 on success, otherwise error
6021 */
smb2_set_info(struct ksmbd_work * work)6022 int smb2_set_info(struct ksmbd_work *work)
6023 {
6024 struct smb2_set_info_req *req;
6025 struct smb2_set_info_rsp *rsp;
6026 struct ksmbd_file *fp;
6027 int rc = 0;
6028 unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
6029
6030 ksmbd_debug(SMB, "Received set info request\n");
6031
6032 if (work->next_smb2_rcv_hdr_off) {
6033 req = ksmbd_req_buf_next(work);
6034 rsp = ksmbd_resp_buf_next(work);
6035 if (!has_file_id(req->VolatileFileId)) {
6036 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
6037 work->compound_fid);
6038 id = work->compound_fid;
6039 pid = work->compound_pfid;
6040 }
6041 } else {
6042 req = smb2_get_msg(work->request_buf);
6043 rsp = smb2_get_msg(work->response_buf);
6044 }
6045
6046 if (!has_file_id(id)) {
6047 id = req->VolatileFileId;
6048 pid = req->PersistentFileId;
6049 }
6050
6051 fp = ksmbd_lookup_fd_slow(work, id, pid);
6052 if (!fp) {
6053 ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
6054 rc = -ENOENT;
6055 goto err_out;
6056 }
6057
6058 switch (req->InfoType) {
6059 case SMB2_O_INFO_FILE:
6060 ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
6061 rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
6062 break;
6063 case SMB2_O_INFO_SECURITY:
6064 ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
6065 if (ksmbd_override_fsids(work)) {
6066 rc = -ENOMEM;
6067 goto err_out;
6068 }
6069 rc = smb2_set_info_sec(fp,
6070 le32_to_cpu(req->AdditionalInformation),
6071 req->Buffer,
6072 le32_to_cpu(req->BufferLength));
6073 ksmbd_revert_fsids(work);
6074 break;
6075 default:
6076 rc = -EOPNOTSUPP;
6077 }
6078
6079 if (rc < 0)
6080 goto err_out;
6081
6082 rsp->StructureSize = cpu_to_le16(2);
6083 inc_rfc1001_len(work->response_buf, 2);
6084 ksmbd_fd_put(work, fp);
6085 return 0;
6086
6087 err_out:
6088 if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
6089 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6090 else if (rc == -EINVAL)
6091 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6092 else if (rc == -ESHARE)
6093 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6094 else if (rc == -ENOENT)
6095 rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
6096 else if (rc == -EBUSY || rc == -ENOTEMPTY)
6097 rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
6098 else if (rc == -EAGAIN)
6099 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6100 else if (rc == -EBADF || rc == -ESTALE)
6101 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6102 else if (rc == -EEXIST)
6103 rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
6104 else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
6105 rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
6106 smb2_set_err_rsp(work);
6107 ksmbd_fd_put(work, fp);
6108 ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
6109 return rc;
6110 }
6111
6112 /**
6113 * smb2_read_pipe() - handler for smb2 read from IPC pipe
6114 * @work: smb work containing read IPC pipe command buffer
6115 *
6116 * Return: 0 on success, otherwise error
6117 */
smb2_read_pipe(struct ksmbd_work * work)6118 static noinline int smb2_read_pipe(struct ksmbd_work *work)
6119 {
6120 int nbytes = 0, err;
6121 u64 id;
6122 struct ksmbd_rpc_command *rpc_resp;
6123 struct smb2_read_req *req = smb2_get_msg(work->request_buf);
6124 struct smb2_read_rsp *rsp = smb2_get_msg(work->response_buf);
6125
6126 id = req->VolatileFileId;
6127
6128 inc_rfc1001_len(work->response_buf, 16);
6129 rpc_resp = ksmbd_rpc_read(work->sess, id);
6130 if (rpc_resp) {
6131 if (rpc_resp->flags != KSMBD_RPC_OK) {
6132 err = -EINVAL;
6133 goto out;
6134 }
6135
6136 work->aux_payload_buf =
6137 kvmalloc(rpc_resp->payload_sz, GFP_KERNEL | __GFP_ZERO);
6138 if (!work->aux_payload_buf) {
6139 err = -ENOMEM;
6140 goto out;
6141 }
6142
6143 memcpy(work->aux_payload_buf, rpc_resp->payload,
6144 rpc_resp->payload_sz);
6145
6146 nbytes = rpc_resp->payload_sz;
6147 work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6148 work->aux_payload_sz = nbytes;
6149 kvfree(rpc_resp);
6150 }
6151
6152 rsp->StructureSize = cpu_to_le16(17);
6153 rsp->DataOffset = 80;
6154 rsp->Reserved = 0;
6155 rsp->DataLength = cpu_to_le32(nbytes);
6156 rsp->DataRemaining = 0;
6157 rsp->Flags = 0;
6158 inc_rfc1001_len(work->response_buf, nbytes);
6159 return 0;
6160
6161 out:
6162 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
6163 smb2_set_err_rsp(work);
6164 kvfree(rpc_resp);
6165 return err;
6166 }
6167
smb2_set_remote_key_for_rdma(struct ksmbd_work * work,struct smb2_buffer_desc_v1 * desc,__le32 Channel,__le16 ChannelInfoLength)6168 static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
6169 struct smb2_buffer_desc_v1 *desc,
6170 __le32 Channel,
6171 __le16 ChannelInfoLength)
6172 {
6173 unsigned int i, ch_count;
6174
6175 if (work->conn->dialect == SMB30_PROT_ID &&
6176 Channel != SMB2_CHANNEL_RDMA_V1)
6177 return -EINVAL;
6178
6179 ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
6180 if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
6181 for (i = 0; i < ch_count; i++) {
6182 pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
6183 i,
6184 le32_to_cpu(desc[i].token),
6185 le32_to_cpu(desc[i].length));
6186 }
6187 }
6188 if (!ch_count)
6189 return -EINVAL;
6190
6191 work->need_invalidate_rkey =
6192 (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
6193 if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
6194 work->remote_key = le32_to_cpu(desc->token);
6195 return 0;
6196 }
6197
smb2_read_rdma_channel(struct ksmbd_work * work,struct smb2_read_req * req,void * data_buf,size_t length)6198 static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
6199 struct smb2_read_req *req, void *data_buf,
6200 size_t length)
6201 {
6202 int err;
6203
6204 err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
6205 (struct smb2_buffer_desc_v1 *)
6206 ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
6207 le16_to_cpu(req->ReadChannelInfoLength));
6208 if (err)
6209 return err;
6210
6211 return length;
6212 }
6213
6214 /**
6215 * smb2_read() - handler for smb2 read from file
6216 * @work: smb work containing read command buffer
6217 *
6218 * Return: 0 on success, otherwise error
6219 */
smb2_read(struct ksmbd_work * work)6220 int smb2_read(struct ksmbd_work *work)
6221 {
6222 struct ksmbd_conn *conn = work->conn;
6223 struct smb2_read_req *req;
6224 struct smb2_read_rsp *rsp;
6225 struct ksmbd_file *fp = NULL;
6226 loff_t offset;
6227 size_t length, mincount;
6228 ssize_t nbytes = 0, remain_bytes = 0;
6229 int err = 0;
6230 bool is_rdma_channel = false;
6231 unsigned int max_read_size = conn->vals->max_read_size;
6232
6233 WORK_BUFFERS(work, req, rsp);
6234
6235 if (test_share_config_flag(work->tcon->share_conf,
6236 KSMBD_SHARE_FLAG_PIPE)) {
6237 ksmbd_debug(SMB, "IPC pipe read request\n");
6238 return smb2_read_pipe(work);
6239 }
6240
6241 if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
6242 req->Channel == SMB2_CHANNEL_RDMA_V1) {
6243 is_rdma_channel = true;
6244 max_read_size = get_smbd_max_read_write_size();
6245 }
6246
6247 if (is_rdma_channel == true) {
6248 unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
6249
6250 if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
6251 err = -EINVAL;
6252 goto out;
6253 }
6254 err = smb2_set_remote_key_for_rdma(work,
6255 (struct smb2_buffer_desc_v1 *)
6256 ((char *)req + ch_offset),
6257 req->Channel,
6258 req->ReadChannelInfoLength);
6259 if (err)
6260 goto out;
6261 }
6262
6263 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6264 if (!fp) {
6265 err = -ENOENT;
6266 goto out;
6267 }
6268
6269 if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6270 pr_err("Not permitted to read : 0x%x\n", fp->daccess);
6271 err = -EACCES;
6272 goto out;
6273 }
6274
6275 offset = le64_to_cpu(req->Offset);
6276 length = le32_to_cpu(req->Length);
6277 mincount = le32_to_cpu(req->MinimumCount);
6278
6279 if (length > max_read_size) {
6280 ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
6281 max_read_size);
6282 err = -EINVAL;
6283 goto out;
6284 }
6285
6286 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6287 fp->filp, offset, length);
6288
6289 work->aux_payload_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6290 if (!work->aux_payload_buf) {
6291 err = -ENOMEM;
6292 goto out;
6293 }
6294
6295 nbytes = ksmbd_vfs_read(work, fp, length, &offset);
6296 if (nbytes < 0) {
6297 err = nbytes;
6298 goto out;
6299 }
6300
6301 if ((nbytes == 0 && length != 0) || nbytes < mincount) {
6302 kvfree(work->aux_payload_buf);
6303 work->aux_payload_buf = NULL;
6304 rsp->hdr.Status = STATUS_END_OF_FILE;
6305 smb2_set_err_rsp(work);
6306 ksmbd_fd_put(work, fp);
6307 return 0;
6308 }
6309
6310 ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
6311 nbytes, offset, mincount);
6312
6313 if (is_rdma_channel == true) {
6314 /* write data to the client using rdma channel */
6315 remain_bytes = smb2_read_rdma_channel(work, req,
6316 work->aux_payload_buf,
6317 nbytes);
6318 kvfree(work->aux_payload_buf);
6319 work->aux_payload_buf = NULL;
6320
6321 nbytes = 0;
6322 if (remain_bytes < 0) {
6323 err = (int)remain_bytes;
6324 goto out;
6325 }
6326 }
6327
6328 rsp->StructureSize = cpu_to_le16(17);
6329 rsp->DataOffset = 80;
6330 rsp->Reserved = 0;
6331 rsp->DataLength = cpu_to_le32(nbytes);
6332 rsp->DataRemaining = cpu_to_le32(remain_bytes);
6333 rsp->Flags = 0;
6334 inc_rfc1001_len(work->response_buf, 16);
6335 work->resp_hdr_sz = get_rfc1002_len(work->response_buf) + 4;
6336 work->aux_payload_sz = nbytes;
6337 inc_rfc1001_len(work->response_buf, nbytes);
6338 ksmbd_fd_put(work, fp);
6339 return 0;
6340
6341 out:
6342 if (err) {
6343 if (err == -EISDIR)
6344 rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
6345 else if (err == -EAGAIN)
6346 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6347 else if (err == -ENOENT)
6348 rsp->hdr.Status = STATUS_FILE_CLOSED;
6349 else if (err == -EACCES)
6350 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6351 else if (err == -ESHARE)
6352 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6353 else if (err == -EINVAL)
6354 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6355 else
6356 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6357
6358 smb2_set_err_rsp(work);
6359 }
6360 ksmbd_fd_put(work, fp);
6361 return err;
6362 }
6363
6364 /**
6365 * smb2_write_pipe() - handler for smb2 write on IPC pipe
6366 * @work: smb work containing write IPC pipe command buffer
6367 *
6368 * Return: 0 on success, otherwise error
6369 */
smb2_write_pipe(struct ksmbd_work * work)6370 static noinline int smb2_write_pipe(struct ksmbd_work *work)
6371 {
6372 struct smb2_write_req *req = smb2_get_msg(work->request_buf);
6373 struct smb2_write_rsp *rsp = smb2_get_msg(work->response_buf);
6374 struct ksmbd_rpc_command *rpc_resp;
6375 u64 id = 0;
6376 int err = 0, ret = 0;
6377 char *data_buf;
6378 size_t length;
6379
6380 length = le32_to_cpu(req->Length);
6381 id = req->VolatileFileId;
6382
6383 if ((u64)le16_to_cpu(req->DataOffset) + length >
6384 get_rfc1002_len(work->request_buf)) {
6385 pr_err("invalid write data offset %u, smb_len %u\n",
6386 le16_to_cpu(req->DataOffset),
6387 get_rfc1002_len(work->request_buf));
6388 err = -EINVAL;
6389 goto out;
6390 }
6391
6392 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6393 le16_to_cpu(req->DataOffset));
6394
6395 rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
6396 if (rpc_resp) {
6397 if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
6398 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
6399 kvfree(rpc_resp);
6400 smb2_set_err_rsp(work);
6401 return -EOPNOTSUPP;
6402 }
6403 if (rpc_resp->flags != KSMBD_RPC_OK) {
6404 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6405 smb2_set_err_rsp(work);
6406 kvfree(rpc_resp);
6407 return ret;
6408 }
6409 kvfree(rpc_resp);
6410 }
6411
6412 rsp->StructureSize = cpu_to_le16(17);
6413 rsp->DataOffset = 0;
6414 rsp->Reserved = 0;
6415 rsp->DataLength = cpu_to_le32(length);
6416 rsp->DataRemaining = 0;
6417 rsp->Reserved2 = 0;
6418 inc_rfc1001_len(work->response_buf, 16);
6419 return 0;
6420 out:
6421 if (err) {
6422 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6423 smb2_set_err_rsp(work);
6424 }
6425
6426 return err;
6427 }
6428
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)6429 static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
6430 struct smb2_write_req *req,
6431 struct ksmbd_file *fp,
6432 loff_t offset, size_t length, bool sync)
6433 {
6434 char *data_buf;
6435 int ret;
6436 ssize_t nbytes;
6437
6438 data_buf = kvmalloc(length, GFP_KERNEL | __GFP_ZERO);
6439 if (!data_buf)
6440 return -ENOMEM;
6441
6442 ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
6443 (struct smb2_buffer_desc_v1 *)
6444 ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
6445 le16_to_cpu(req->WriteChannelInfoLength));
6446 if (ret < 0) {
6447 kvfree(data_buf);
6448 return ret;
6449 }
6450
6451 ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
6452 kvfree(data_buf);
6453 if (ret < 0)
6454 return ret;
6455
6456 return nbytes;
6457 }
6458
6459 /**
6460 * smb2_write() - handler for smb2 write from file
6461 * @work: smb work containing write command buffer
6462 *
6463 * Return: 0 on success, otherwise error
6464 */
smb2_write(struct ksmbd_work * work)6465 int smb2_write(struct ksmbd_work *work)
6466 {
6467 struct smb2_write_req *req;
6468 struct smb2_write_rsp *rsp;
6469 struct ksmbd_file *fp = NULL;
6470 loff_t offset;
6471 size_t length;
6472 ssize_t nbytes;
6473 char *data_buf;
6474 bool writethrough = false, is_rdma_channel = false;
6475 int err = 0;
6476 unsigned int max_write_size = work->conn->vals->max_write_size;
6477
6478 WORK_BUFFERS(work, req, rsp);
6479
6480 if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
6481 ksmbd_debug(SMB, "IPC pipe write request\n");
6482 return smb2_write_pipe(work);
6483 }
6484
6485 offset = le64_to_cpu(req->Offset);
6486 length = le32_to_cpu(req->Length);
6487
6488 if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
6489 req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
6490 is_rdma_channel = true;
6491 max_write_size = get_smbd_max_read_write_size();
6492 length = le32_to_cpu(req->RemainingBytes);
6493 }
6494
6495 if (is_rdma_channel == true) {
6496 unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
6497
6498 if (req->Length != 0 || req->DataOffset != 0 ||
6499 ch_offset < offsetof(struct smb2_write_req, Buffer)) {
6500 err = -EINVAL;
6501 goto out;
6502 }
6503 err = smb2_set_remote_key_for_rdma(work,
6504 (struct smb2_buffer_desc_v1 *)
6505 ((char *)req + ch_offset),
6506 req->Channel,
6507 req->WriteChannelInfoLength);
6508 if (err)
6509 goto out;
6510 }
6511
6512 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
6513 ksmbd_debug(SMB, "User does not have write permission\n");
6514 err = -EACCES;
6515 goto out;
6516 }
6517
6518 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6519 if (!fp) {
6520 err = -ENOENT;
6521 goto out;
6522 }
6523
6524 if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
6525 pr_err("Not permitted to write : 0x%x\n", fp->daccess);
6526 err = -EACCES;
6527 goto out;
6528 }
6529
6530 if (length > max_write_size) {
6531 ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
6532 max_write_size);
6533 err = -EINVAL;
6534 goto out;
6535 }
6536
6537 ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
6538 if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
6539 writethrough = true;
6540
6541 if (is_rdma_channel == false) {
6542 if (le16_to_cpu(req->DataOffset) <
6543 offsetof(struct smb2_write_req, Buffer)) {
6544 err = -EINVAL;
6545 goto out;
6546 }
6547
6548 data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
6549 le16_to_cpu(req->DataOffset));
6550
6551 ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
6552 fp->filp, offset, length);
6553 err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
6554 writethrough, &nbytes);
6555 if (err < 0)
6556 goto out;
6557 } else {
6558 /* read data from the client using rdma channel, and
6559 * write the data.
6560 */
6561 nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
6562 writethrough);
6563 if (nbytes < 0) {
6564 err = (int)nbytes;
6565 goto out;
6566 }
6567 }
6568
6569 rsp->StructureSize = cpu_to_le16(17);
6570 rsp->DataOffset = 0;
6571 rsp->Reserved = 0;
6572 rsp->DataLength = cpu_to_le32(nbytes);
6573 rsp->DataRemaining = 0;
6574 rsp->Reserved2 = 0;
6575 inc_rfc1001_len(work->response_buf, 16);
6576 ksmbd_fd_put(work, fp);
6577 return 0;
6578
6579 out:
6580 if (err == -EAGAIN)
6581 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
6582 else if (err == -ENOSPC || err == -EFBIG)
6583 rsp->hdr.Status = STATUS_DISK_FULL;
6584 else if (err == -ENOENT)
6585 rsp->hdr.Status = STATUS_FILE_CLOSED;
6586 else if (err == -EACCES)
6587 rsp->hdr.Status = STATUS_ACCESS_DENIED;
6588 else if (err == -ESHARE)
6589 rsp->hdr.Status = STATUS_SHARING_VIOLATION;
6590 else if (err == -EINVAL)
6591 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
6592 else
6593 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6594
6595 smb2_set_err_rsp(work);
6596 ksmbd_fd_put(work, fp);
6597 return err;
6598 }
6599
6600 /**
6601 * smb2_flush() - handler for smb2 flush file - fsync
6602 * @work: smb work containing flush command buffer
6603 *
6604 * Return: 0 on success, otherwise error
6605 */
smb2_flush(struct ksmbd_work * work)6606 int smb2_flush(struct ksmbd_work *work)
6607 {
6608 struct smb2_flush_req *req;
6609 struct smb2_flush_rsp *rsp;
6610 int err;
6611
6612 WORK_BUFFERS(work, req, rsp);
6613
6614 ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
6615
6616 err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
6617 if (err)
6618 goto out;
6619
6620 rsp->StructureSize = cpu_to_le16(4);
6621 rsp->Reserved = 0;
6622 inc_rfc1001_len(work->response_buf, 4);
6623 return 0;
6624
6625 out:
6626 if (err) {
6627 rsp->hdr.Status = STATUS_INVALID_HANDLE;
6628 smb2_set_err_rsp(work);
6629 }
6630
6631 return err;
6632 }
6633
6634 /**
6635 * smb2_cancel() - handler for smb2 cancel command
6636 * @work: smb work containing cancel command buffer
6637 *
6638 * Return: 0 on success, otherwise error
6639 */
smb2_cancel(struct ksmbd_work * work)6640 int smb2_cancel(struct ksmbd_work *work)
6641 {
6642 struct ksmbd_conn *conn = work->conn;
6643 struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
6644 struct smb2_hdr *chdr;
6645 struct ksmbd_work *cancel_work = NULL, *iter;
6646 struct list_head *command_list;
6647
6648 ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
6649 hdr->MessageId, hdr->Flags);
6650
6651 if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
6652 command_list = &conn->async_requests;
6653
6654 spin_lock(&conn->request_lock);
6655 list_for_each_entry(iter, command_list,
6656 async_request_entry) {
6657 chdr = smb2_get_msg(iter->request_buf);
6658
6659 if (iter->async_id !=
6660 le64_to_cpu(hdr->Id.AsyncId))
6661 continue;
6662
6663 ksmbd_debug(SMB,
6664 "smb2 with AsyncId %llu cancelled command = 0x%x\n",
6665 le64_to_cpu(hdr->Id.AsyncId),
6666 le16_to_cpu(chdr->Command));
6667 cancel_work = iter;
6668 break;
6669 }
6670 spin_unlock(&conn->request_lock);
6671 } else {
6672 command_list = &conn->requests;
6673
6674 spin_lock(&conn->request_lock);
6675 list_for_each_entry(iter, command_list, request_entry) {
6676 chdr = smb2_get_msg(iter->request_buf);
6677
6678 if (chdr->MessageId != hdr->MessageId ||
6679 iter == work)
6680 continue;
6681
6682 ksmbd_debug(SMB,
6683 "smb2 with mid %llu cancelled command = 0x%x\n",
6684 le64_to_cpu(hdr->MessageId),
6685 le16_to_cpu(chdr->Command));
6686 cancel_work = iter;
6687 break;
6688 }
6689 spin_unlock(&conn->request_lock);
6690 }
6691
6692 if (cancel_work) {
6693 cancel_work->state = KSMBD_WORK_CANCELLED;
6694 if (cancel_work->cancel_fn)
6695 cancel_work->cancel_fn(cancel_work->cancel_argv);
6696 }
6697
6698 /* For SMB2_CANCEL command itself send no response*/
6699 work->send_no_response = 1;
6700 return 0;
6701 }
6702
smb_flock_init(struct file * f)6703 struct file_lock *smb_flock_init(struct file *f)
6704 {
6705 struct file_lock *fl;
6706
6707 fl = locks_alloc_lock();
6708 if (!fl)
6709 goto out;
6710
6711 locks_init_lock(fl);
6712
6713 fl->fl_owner = f;
6714 fl->fl_pid = current->tgid;
6715 fl->fl_file = f;
6716 fl->fl_flags = FL_POSIX;
6717 fl->fl_ops = NULL;
6718 fl->fl_lmops = NULL;
6719
6720 out:
6721 return fl;
6722 }
6723
smb2_set_flock_flags(struct file_lock * flock,int flags)6724 static int smb2_set_flock_flags(struct file_lock *flock, int flags)
6725 {
6726 int cmd = -EINVAL;
6727
6728 /* Checking for wrong flag combination during lock request*/
6729 switch (flags) {
6730 case SMB2_LOCKFLAG_SHARED:
6731 ksmbd_debug(SMB, "received shared request\n");
6732 cmd = F_SETLKW;
6733 flock->fl_type = F_RDLCK;
6734 flock->fl_flags |= FL_SLEEP;
6735 break;
6736 case SMB2_LOCKFLAG_EXCLUSIVE:
6737 ksmbd_debug(SMB, "received exclusive request\n");
6738 cmd = F_SETLKW;
6739 flock->fl_type = F_WRLCK;
6740 flock->fl_flags |= FL_SLEEP;
6741 break;
6742 case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6743 ksmbd_debug(SMB,
6744 "received shared & fail immediately request\n");
6745 cmd = F_SETLK;
6746 flock->fl_type = F_RDLCK;
6747 break;
6748 case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
6749 ksmbd_debug(SMB,
6750 "received exclusive & fail immediately request\n");
6751 cmd = F_SETLK;
6752 flock->fl_type = F_WRLCK;
6753 break;
6754 case SMB2_LOCKFLAG_UNLOCK:
6755 ksmbd_debug(SMB, "received unlock request\n");
6756 flock->fl_type = F_UNLCK;
6757 cmd = 0;
6758 break;
6759 }
6760
6761 return cmd;
6762 }
6763
smb2_lock_init(struct file_lock * flock,unsigned int cmd,int flags,struct list_head * lock_list)6764 static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
6765 unsigned int cmd, int flags,
6766 struct list_head *lock_list)
6767 {
6768 struct ksmbd_lock *lock;
6769
6770 lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
6771 if (!lock)
6772 return NULL;
6773
6774 lock->cmd = cmd;
6775 lock->fl = flock;
6776 lock->start = flock->fl_start;
6777 lock->end = flock->fl_end;
6778 lock->flags = flags;
6779 if (lock->start == lock->end)
6780 lock->zero_len = 1;
6781 INIT_LIST_HEAD(&lock->clist);
6782 INIT_LIST_HEAD(&lock->flist);
6783 INIT_LIST_HEAD(&lock->llist);
6784 list_add_tail(&lock->llist, lock_list);
6785
6786 return lock;
6787 }
6788
smb2_remove_blocked_lock(void ** argv)6789 static void smb2_remove_blocked_lock(void **argv)
6790 {
6791 struct file_lock *flock = (struct file_lock *)argv[0];
6792
6793 ksmbd_vfs_posix_lock_unblock(flock);
6794 wake_up(&flock->fl_wait);
6795 }
6796
lock_defer_pending(struct file_lock * fl)6797 static inline bool lock_defer_pending(struct file_lock *fl)
6798 {
6799 /* check pending lock waiters */
6800 return waitqueue_active(&fl->fl_wait);
6801 }
6802
6803 /**
6804 * smb2_lock() - handler for smb2 file lock command
6805 * @work: smb work containing lock command buffer
6806 *
6807 * Return: 0 on success, otherwise error
6808 */
smb2_lock(struct ksmbd_work * work)6809 int smb2_lock(struct ksmbd_work *work)
6810 {
6811 struct smb2_lock_req *req = smb2_get_msg(work->request_buf);
6812 struct smb2_lock_rsp *rsp = smb2_get_msg(work->response_buf);
6813 struct smb2_lock_element *lock_ele;
6814 struct ksmbd_file *fp = NULL;
6815 struct file_lock *flock = NULL;
6816 struct file *filp = NULL;
6817 int lock_count;
6818 int flags = 0;
6819 int cmd = 0;
6820 int err = -EIO, i, rc = 0;
6821 u64 lock_start, lock_length;
6822 struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
6823 struct ksmbd_conn *conn;
6824 int nolock = 0;
6825 LIST_HEAD(lock_list);
6826 LIST_HEAD(rollback_list);
6827 int prior_lock = 0;
6828
6829 ksmbd_debug(SMB, "Received lock request\n");
6830 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
6831 if (!fp) {
6832 ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
6833 err = -ENOENT;
6834 goto out2;
6835 }
6836
6837 filp = fp->filp;
6838 lock_count = le16_to_cpu(req->LockCount);
6839 lock_ele = req->locks;
6840
6841 ksmbd_debug(SMB, "lock count is %d\n", lock_count);
6842 if (!lock_count) {
6843 err = -EINVAL;
6844 goto out2;
6845 }
6846
6847 for (i = 0; i < lock_count; i++) {
6848 flags = le32_to_cpu(lock_ele[i].Flags);
6849
6850 flock = smb_flock_init(filp);
6851 if (!flock)
6852 goto out;
6853
6854 cmd = smb2_set_flock_flags(flock, flags);
6855
6856 lock_start = le64_to_cpu(lock_ele[i].Offset);
6857 lock_length = le64_to_cpu(lock_ele[i].Length);
6858 if (lock_start > U64_MAX - lock_length) {
6859 pr_err("Invalid lock range requested\n");
6860 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6861 goto out;
6862 }
6863
6864 if (lock_start > OFFSET_MAX)
6865 flock->fl_start = OFFSET_MAX;
6866 else
6867 flock->fl_start = lock_start;
6868
6869 lock_length = le64_to_cpu(lock_ele[i].Length);
6870 if (lock_length > OFFSET_MAX - flock->fl_start)
6871 lock_length = OFFSET_MAX - flock->fl_start;
6872
6873 flock->fl_end = flock->fl_start + lock_length;
6874
6875 if (flock->fl_end < flock->fl_start) {
6876 ksmbd_debug(SMB,
6877 "the end offset(%llx) is smaller than the start offset(%llx)\n",
6878 flock->fl_end, flock->fl_start);
6879 rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
6880 goto out;
6881 }
6882
6883 /* Check conflict locks in one request */
6884 list_for_each_entry(cmp_lock, &lock_list, llist) {
6885 if (cmp_lock->fl->fl_start <= flock->fl_start &&
6886 cmp_lock->fl->fl_end >= flock->fl_end) {
6887 if (cmp_lock->fl->fl_type != F_UNLCK &&
6888 flock->fl_type != F_UNLCK) {
6889 pr_err("conflict two locks in one request\n");
6890 err = -EINVAL;
6891 goto out;
6892 }
6893 }
6894 }
6895
6896 smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
6897 if (!smb_lock) {
6898 err = -EINVAL;
6899 goto out;
6900 }
6901 }
6902
6903 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
6904 if (smb_lock->cmd < 0) {
6905 err = -EINVAL;
6906 goto out;
6907 }
6908
6909 if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
6910 err = -EINVAL;
6911 goto out;
6912 }
6913
6914 if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
6915 smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
6916 (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
6917 !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
6918 err = -EINVAL;
6919 goto out;
6920 }
6921
6922 prior_lock = smb_lock->flags;
6923
6924 if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
6925 !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
6926 goto no_check_cl;
6927
6928 nolock = 1;
6929 /* check locks in connection list */
6930 read_lock(&conn_list_lock);
6931 list_for_each_entry(conn, &conn_list, conns_list) {
6932 spin_lock(&conn->llist_lock);
6933 list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
6934 if (file_inode(cmp_lock->fl->fl_file) !=
6935 file_inode(smb_lock->fl->fl_file))
6936 continue;
6937
6938 if (smb_lock->fl->fl_type == F_UNLCK) {
6939 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
6940 cmp_lock->start == smb_lock->start &&
6941 cmp_lock->end == smb_lock->end &&
6942 !lock_defer_pending(cmp_lock->fl)) {
6943 nolock = 0;
6944 list_del(&cmp_lock->flist);
6945 list_del(&cmp_lock->clist);
6946 spin_unlock(&conn->llist_lock);
6947 read_unlock(&conn_list_lock);
6948
6949 locks_free_lock(cmp_lock->fl);
6950 kfree(cmp_lock);
6951 goto out_check_cl;
6952 }
6953 continue;
6954 }
6955
6956 if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
6957 if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
6958 continue;
6959 } else {
6960 if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
6961 continue;
6962 }
6963
6964 /* check zero byte lock range */
6965 if (cmp_lock->zero_len && !smb_lock->zero_len &&
6966 cmp_lock->start > smb_lock->start &&
6967 cmp_lock->start < smb_lock->end) {
6968 spin_unlock(&conn->llist_lock);
6969 read_unlock(&conn_list_lock);
6970 pr_err("previous lock conflict with zero byte lock range\n");
6971 goto out;
6972 }
6973
6974 if (smb_lock->zero_len && !cmp_lock->zero_len &&
6975 smb_lock->start > cmp_lock->start &&
6976 smb_lock->start < cmp_lock->end) {
6977 spin_unlock(&conn->llist_lock);
6978 read_unlock(&conn_list_lock);
6979 pr_err("current lock conflict with zero byte lock range\n");
6980 goto out;
6981 }
6982
6983 if (((cmp_lock->start <= smb_lock->start &&
6984 cmp_lock->end > smb_lock->start) ||
6985 (cmp_lock->start < smb_lock->end &&
6986 cmp_lock->end >= smb_lock->end)) &&
6987 !cmp_lock->zero_len && !smb_lock->zero_len) {
6988 spin_unlock(&conn->llist_lock);
6989 read_unlock(&conn_list_lock);
6990 pr_err("Not allow lock operation on exclusive lock range\n");
6991 goto out;
6992 }
6993 }
6994 spin_unlock(&conn->llist_lock);
6995 }
6996 read_unlock(&conn_list_lock);
6997 out_check_cl:
6998 if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
6999 pr_err("Try to unlock nolocked range\n");
7000 rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
7001 goto out;
7002 }
7003
7004 no_check_cl:
7005 if (smb_lock->zero_len) {
7006 err = 0;
7007 goto skip;
7008 }
7009
7010 flock = smb_lock->fl;
7011 list_del(&smb_lock->llist);
7012 retry:
7013 rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
7014 skip:
7015 if (flags & SMB2_LOCKFLAG_UNLOCK) {
7016 if (!rc) {
7017 ksmbd_debug(SMB, "File unlocked\n");
7018 } else if (rc == -ENOENT) {
7019 rsp->hdr.Status = STATUS_NOT_LOCKED;
7020 goto out;
7021 }
7022 locks_free_lock(flock);
7023 kfree(smb_lock);
7024 } else {
7025 if (rc == FILE_LOCK_DEFERRED) {
7026 void **argv;
7027
7028 ksmbd_debug(SMB,
7029 "would have to wait for getting lock\n");
7030 spin_lock(&work->conn->llist_lock);
7031 list_add_tail(&smb_lock->clist,
7032 &work->conn->lock_list);
7033 spin_unlock(&work->conn->llist_lock);
7034 list_add(&smb_lock->llist, &rollback_list);
7035
7036 argv = kmalloc(sizeof(void *), GFP_KERNEL);
7037 if (!argv) {
7038 err = -ENOMEM;
7039 goto out;
7040 }
7041 argv[0] = flock;
7042
7043 rc = setup_async_work(work,
7044 smb2_remove_blocked_lock,
7045 argv);
7046 if (rc) {
7047 err = -ENOMEM;
7048 goto out;
7049 }
7050 spin_lock(&fp->f_lock);
7051 list_add(&work->fp_entry, &fp->blocked_works);
7052 spin_unlock(&fp->f_lock);
7053
7054 smb2_send_interim_resp(work, STATUS_PENDING);
7055
7056 ksmbd_vfs_posix_lock_wait(flock);
7057
7058 if (work->state != KSMBD_WORK_ACTIVE) {
7059 list_del(&smb_lock->llist);
7060 spin_lock(&work->conn->llist_lock);
7061 list_del(&smb_lock->clist);
7062 spin_unlock(&work->conn->llist_lock);
7063 locks_free_lock(flock);
7064
7065 if (work->state == KSMBD_WORK_CANCELLED) {
7066 spin_lock(&fp->f_lock);
7067 list_del(&work->fp_entry);
7068 spin_unlock(&fp->f_lock);
7069 rsp->hdr.Status =
7070 STATUS_CANCELLED;
7071 kfree(smb_lock);
7072 smb2_send_interim_resp(work,
7073 STATUS_CANCELLED);
7074 work->send_no_response = 1;
7075 goto out;
7076 }
7077 init_smb2_rsp_hdr(work);
7078 smb2_set_err_rsp(work);
7079 rsp->hdr.Status =
7080 STATUS_RANGE_NOT_LOCKED;
7081 kfree(smb_lock);
7082 goto out2;
7083 }
7084
7085 list_del(&smb_lock->llist);
7086 spin_lock(&work->conn->llist_lock);
7087 list_del(&smb_lock->clist);
7088 spin_unlock(&work->conn->llist_lock);
7089
7090 spin_lock(&fp->f_lock);
7091 list_del(&work->fp_entry);
7092 spin_unlock(&fp->f_lock);
7093 goto retry;
7094 } else if (!rc) {
7095 spin_lock(&work->conn->llist_lock);
7096 list_add_tail(&smb_lock->clist,
7097 &work->conn->lock_list);
7098 list_add_tail(&smb_lock->flist,
7099 &fp->lock_list);
7100 spin_unlock(&work->conn->llist_lock);
7101 list_add(&smb_lock->llist, &rollback_list);
7102 ksmbd_debug(SMB, "successful in taking lock\n");
7103 } else {
7104 goto out;
7105 }
7106 }
7107 }
7108
7109 if (atomic_read(&fp->f_ci->op_count) > 1)
7110 smb_break_all_oplock(work, fp);
7111
7112 rsp->StructureSize = cpu_to_le16(4);
7113 ksmbd_debug(SMB, "successful in taking lock\n");
7114 rsp->hdr.Status = STATUS_SUCCESS;
7115 rsp->Reserved = 0;
7116 inc_rfc1001_len(work->response_buf, 4);
7117 ksmbd_fd_put(work, fp);
7118 return 0;
7119
7120 out:
7121 list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
7122 locks_free_lock(smb_lock->fl);
7123 list_del(&smb_lock->llist);
7124 kfree(smb_lock);
7125 }
7126
7127 list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
7128 struct file_lock *rlock = NULL;
7129
7130 rlock = smb_flock_init(filp);
7131 rlock->fl_type = F_UNLCK;
7132 rlock->fl_start = smb_lock->start;
7133 rlock->fl_end = smb_lock->end;
7134
7135 rc = vfs_lock_file(filp, 0, rlock, NULL);
7136 if (rc)
7137 pr_err("rollback unlock fail : %d\n", rc);
7138
7139 list_del(&smb_lock->llist);
7140 spin_lock(&work->conn->llist_lock);
7141 if (!list_empty(&smb_lock->flist))
7142 list_del(&smb_lock->flist);
7143 list_del(&smb_lock->clist);
7144 spin_unlock(&work->conn->llist_lock);
7145
7146 locks_free_lock(smb_lock->fl);
7147 locks_free_lock(rlock);
7148 kfree(smb_lock);
7149 }
7150 out2:
7151 ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
7152
7153 if (!rsp->hdr.Status) {
7154 if (err == -EINVAL)
7155 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7156 else if (err == -ENOMEM)
7157 rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
7158 else if (err == -ENOENT)
7159 rsp->hdr.Status = STATUS_FILE_CLOSED;
7160 else
7161 rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
7162 }
7163
7164 smb2_set_err_rsp(work);
7165 ksmbd_fd_put(work, fp);
7166 return err;
7167 }
7168
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)7169 static int fsctl_copychunk(struct ksmbd_work *work,
7170 struct copychunk_ioctl_req *ci_req,
7171 unsigned int cnt_code,
7172 unsigned int input_count,
7173 unsigned long long volatile_id,
7174 unsigned long long persistent_id,
7175 struct smb2_ioctl_rsp *rsp)
7176 {
7177 struct copychunk_ioctl_rsp *ci_rsp;
7178 struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
7179 struct srv_copychunk *chunks;
7180 unsigned int i, chunk_count, chunk_count_written = 0;
7181 unsigned int chunk_size_written = 0;
7182 loff_t total_size_written = 0;
7183 int ret = 0;
7184
7185 ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
7186
7187 rsp->VolatileFileId = volatile_id;
7188 rsp->PersistentFileId = persistent_id;
7189 ci_rsp->ChunksWritten =
7190 cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
7191 ci_rsp->ChunkBytesWritten =
7192 cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
7193 ci_rsp->TotalBytesWritten =
7194 cpu_to_le32(ksmbd_server_side_copy_max_total_size());
7195
7196 chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
7197 chunk_count = le32_to_cpu(ci_req->ChunkCount);
7198 if (chunk_count == 0)
7199 goto out;
7200 total_size_written = 0;
7201
7202 /* verify the SRV_COPYCHUNK_COPY packet */
7203 if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
7204 input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
7205 chunk_count * sizeof(struct srv_copychunk)) {
7206 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7207 return -EINVAL;
7208 }
7209
7210 for (i = 0; i < chunk_count; i++) {
7211 if (le32_to_cpu(chunks[i].Length) == 0 ||
7212 le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
7213 break;
7214 total_size_written += le32_to_cpu(chunks[i].Length);
7215 }
7216
7217 if (i < chunk_count ||
7218 total_size_written > ksmbd_server_side_copy_max_total_size()) {
7219 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7220 return -EINVAL;
7221 }
7222
7223 src_fp = ksmbd_lookup_foreign_fd(work,
7224 le64_to_cpu(ci_req->ResumeKey[0]));
7225 dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7226 ret = -EINVAL;
7227 if (!src_fp ||
7228 src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
7229 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7230 goto out;
7231 }
7232
7233 if (!dst_fp) {
7234 rsp->hdr.Status = STATUS_FILE_CLOSED;
7235 goto out;
7236 }
7237
7238 /*
7239 * FILE_READ_DATA should only be included in
7240 * the FSCTL_COPYCHUNK case
7241 */
7242 if (cnt_code == FSCTL_COPYCHUNK &&
7243 !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
7244 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7245 goto out;
7246 }
7247
7248 ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
7249 chunks, chunk_count,
7250 &chunk_count_written,
7251 &chunk_size_written,
7252 &total_size_written);
7253 if (ret < 0) {
7254 if (ret == -EACCES)
7255 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7256 if (ret == -EAGAIN)
7257 rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
7258 else if (ret == -EBADF)
7259 rsp->hdr.Status = STATUS_INVALID_HANDLE;
7260 else if (ret == -EFBIG || ret == -ENOSPC)
7261 rsp->hdr.Status = STATUS_DISK_FULL;
7262 else if (ret == -EINVAL)
7263 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7264 else if (ret == -EISDIR)
7265 rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
7266 else if (ret == -E2BIG)
7267 rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
7268 else
7269 rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
7270 }
7271
7272 ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
7273 ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
7274 ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
7275 out:
7276 ksmbd_fd_put(work, src_fp);
7277 ksmbd_fd_put(work, dst_fp);
7278 return ret;
7279 }
7280
idev_ipv4_address(struct in_device * idev)7281 static __be32 idev_ipv4_address(struct in_device *idev)
7282 {
7283 __be32 addr = 0;
7284
7285 struct in_ifaddr *ifa;
7286
7287 rcu_read_lock();
7288 in_dev_for_each_ifa_rcu(ifa, idev) {
7289 if (ifa->ifa_flags & IFA_F_SECONDARY)
7290 continue;
7291
7292 addr = ifa->ifa_address;
7293 break;
7294 }
7295 rcu_read_unlock();
7296 return addr;
7297 }
7298
fsctl_query_iface_info_ioctl(struct ksmbd_conn * conn,struct smb2_ioctl_rsp * rsp,unsigned int out_buf_len)7299 static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
7300 struct smb2_ioctl_rsp *rsp,
7301 unsigned int out_buf_len)
7302 {
7303 struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
7304 int nbytes = 0;
7305 struct net_device *netdev;
7306 struct sockaddr_storage_rsp *sockaddr_storage;
7307 unsigned int flags;
7308 unsigned long long speed;
7309
7310 rtnl_lock();
7311 for_each_netdev(&init_net, netdev) {
7312 bool ipv4_set = false;
7313
7314 if (netdev->type == ARPHRD_LOOPBACK)
7315 continue;
7316
7317 flags = dev_get_flags(netdev);
7318 if (!(flags & IFF_RUNNING))
7319 continue;
7320 ipv6_retry:
7321 if (out_buf_len <
7322 nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
7323 rtnl_unlock();
7324 return -ENOSPC;
7325 }
7326
7327 nii_rsp = (struct network_interface_info_ioctl_rsp *)
7328 &rsp->Buffer[nbytes];
7329 nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
7330
7331 nii_rsp->Capability = 0;
7332 if (netdev->real_num_tx_queues > 1)
7333 nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
7334 if (ksmbd_rdma_capable_netdev(netdev))
7335 nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
7336
7337 nii_rsp->Next = cpu_to_le32(152);
7338 nii_rsp->Reserved = 0;
7339
7340 if (netdev->ethtool_ops->get_link_ksettings) {
7341 struct ethtool_link_ksettings cmd;
7342
7343 netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
7344 speed = cmd.base.speed;
7345 } else {
7346 ksmbd_debug(SMB, "%s %s\n", netdev->name,
7347 "speed is unknown, defaulting to 1Gb/sec");
7348 speed = SPEED_1000;
7349 }
7350
7351 speed *= 1000000;
7352 nii_rsp->LinkSpeed = cpu_to_le64(speed);
7353
7354 sockaddr_storage = (struct sockaddr_storage_rsp *)
7355 nii_rsp->SockAddr_Storage;
7356 memset(sockaddr_storage, 0, 128);
7357
7358 if (!ipv4_set) {
7359 struct in_device *idev;
7360
7361 sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
7362 sockaddr_storage->addr4.Port = 0;
7363
7364 idev = __in_dev_get_rtnl(netdev);
7365 if (!idev)
7366 continue;
7367 sockaddr_storage->addr4.IPv4address =
7368 idev_ipv4_address(idev);
7369 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7370 ipv4_set = true;
7371 goto ipv6_retry;
7372 } else {
7373 struct inet6_dev *idev6;
7374 struct inet6_ifaddr *ifa;
7375 __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
7376
7377 sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
7378 sockaddr_storage->addr6.Port = 0;
7379 sockaddr_storage->addr6.FlowInfo = 0;
7380
7381 idev6 = __in6_dev_get(netdev);
7382 if (!idev6)
7383 continue;
7384
7385 list_for_each_entry(ifa, &idev6->addr_list, if_list) {
7386 if (ifa->flags & (IFA_F_TENTATIVE |
7387 IFA_F_DEPRECATED))
7388 continue;
7389 memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
7390 break;
7391 }
7392 sockaddr_storage->addr6.ScopeId = 0;
7393 nbytes += sizeof(struct network_interface_info_ioctl_rsp);
7394 }
7395 }
7396 rtnl_unlock();
7397
7398 /* zero if this is last one */
7399 if (nii_rsp)
7400 nii_rsp->Next = 0;
7401
7402 rsp->PersistentFileId = SMB2_NO_FID;
7403 rsp->VolatileFileId = SMB2_NO_FID;
7404 return nbytes;
7405 }
7406
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)7407 static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
7408 struct validate_negotiate_info_req *neg_req,
7409 struct validate_negotiate_info_rsp *neg_rsp,
7410 unsigned int in_buf_len)
7411 {
7412 int ret = 0;
7413 int dialect;
7414
7415 if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
7416 le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
7417 return -EINVAL;
7418
7419 dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
7420 neg_req->DialectCount);
7421 if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
7422 ret = -EINVAL;
7423 goto err_out;
7424 }
7425
7426 if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
7427 ret = -EINVAL;
7428 goto err_out;
7429 }
7430
7431 if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
7432 ret = -EINVAL;
7433 goto err_out;
7434 }
7435
7436 if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
7437 ret = -EINVAL;
7438 goto err_out;
7439 }
7440
7441 neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
7442 memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
7443 neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
7444 neg_rsp->Dialect = cpu_to_le16(conn->dialect);
7445 err_out:
7446 return ret;
7447 }
7448
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)7449 static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
7450 struct file_allocated_range_buffer *qar_req,
7451 struct file_allocated_range_buffer *qar_rsp,
7452 unsigned int in_count, unsigned int *out_count)
7453 {
7454 struct ksmbd_file *fp;
7455 loff_t start, length;
7456 int ret = 0;
7457
7458 *out_count = 0;
7459 if (in_count == 0)
7460 return -EINVAL;
7461
7462 fp = ksmbd_lookup_fd_fast(work, id);
7463 if (!fp)
7464 return -ENOENT;
7465
7466 start = le64_to_cpu(qar_req->file_offset);
7467 length = le64_to_cpu(qar_req->length);
7468
7469 ret = ksmbd_vfs_fqar_lseek(fp, start, length,
7470 qar_rsp, in_count, out_count);
7471 if (ret && ret != -E2BIG)
7472 *out_count = 0;
7473
7474 ksmbd_fd_put(work, fp);
7475 return ret;
7476 }
7477
fsctl_pipe_transceive(struct ksmbd_work * work,u64 id,unsigned int out_buf_len,struct smb2_ioctl_req * req,struct smb2_ioctl_rsp * rsp)7478 static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
7479 unsigned int out_buf_len,
7480 struct smb2_ioctl_req *req,
7481 struct smb2_ioctl_rsp *rsp)
7482 {
7483 struct ksmbd_rpc_command *rpc_resp;
7484 char *data_buf = (char *)&req->Buffer[0];
7485 int nbytes = 0;
7486
7487 rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
7488 le32_to_cpu(req->InputCount));
7489 if (rpc_resp) {
7490 if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
7491 /*
7492 * set STATUS_SOME_NOT_MAPPED response
7493 * for unknown domain sid.
7494 */
7495 rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
7496 } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
7497 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7498 goto out;
7499 } else if (rpc_resp->flags != KSMBD_RPC_OK) {
7500 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7501 goto out;
7502 }
7503
7504 nbytes = rpc_resp->payload_sz;
7505 if (rpc_resp->payload_sz > out_buf_len) {
7506 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7507 nbytes = out_buf_len;
7508 }
7509
7510 if (!rpc_resp->payload_sz) {
7511 rsp->hdr.Status =
7512 STATUS_UNEXPECTED_IO_ERROR;
7513 goto out;
7514 }
7515
7516 memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
7517 }
7518 out:
7519 kvfree(rpc_resp);
7520 return nbytes;
7521 }
7522
fsctl_set_sparse(struct ksmbd_work * work,u64 id,struct file_sparse * sparse)7523 static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
7524 struct file_sparse *sparse)
7525 {
7526 struct ksmbd_file *fp;
7527 struct user_namespace *user_ns;
7528 int ret = 0;
7529 __le32 old_fattr;
7530
7531 fp = ksmbd_lookup_fd_fast(work, id);
7532 if (!fp)
7533 return -ENOENT;
7534 user_ns = file_mnt_user_ns(fp->filp);
7535
7536 old_fattr = fp->f_ci->m_fattr;
7537 if (sparse->SetSparse)
7538 fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
7539 else
7540 fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
7541
7542 if (fp->f_ci->m_fattr != old_fattr &&
7543 test_share_config_flag(work->tcon->share_conf,
7544 KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
7545 struct xattr_dos_attrib da;
7546
7547 ret = ksmbd_vfs_get_dos_attrib_xattr(user_ns,
7548 fp->filp->f_path.dentry, &da);
7549 if (ret <= 0)
7550 goto out;
7551
7552 da.attr = le32_to_cpu(fp->f_ci->m_fattr);
7553 ret = ksmbd_vfs_set_dos_attrib_xattr(user_ns,
7554 fp->filp->f_path.dentry, &da);
7555 if (ret)
7556 fp->f_ci->m_fattr = old_fattr;
7557 }
7558
7559 out:
7560 ksmbd_fd_put(work, fp);
7561 return ret;
7562 }
7563
fsctl_request_resume_key(struct ksmbd_work * work,struct smb2_ioctl_req * req,struct resume_key_ioctl_rsp * key_rsp)7564 static int fsctl_request_resume_key(struct ksmbd_work *work,
7565 struct smb2_ioctl_req *req,
7566 struct resume_key_ioctl_rsp *key_rsp)
7567 {
7568 struct ksmbd_file *fp;
7569
7570 fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
7571 if (!fp)
7572 return -ENOENT;
7573
7574 memset(key_rsp, 0, sizeof(*key_rsp));
7575 key_rsp->ResumeKey[0] = req->VolatileFileId;
7576 key_rsp->ResumeKey[1] = req->PersistentFileId;
7577 ksmbd_fd_put(work, fp);
7578
7579 return 0;
7580 }
7581
7582 /**
7583 * smb2_ioctl() - handler for smb2 ioctl command
7584 * @work: smb work containing ioctl command buffer
7585 *
7586 * Return: 0 on success, otherwise error
7587 */
smb2_ioctl(struct ksmbd_work * work)7588 int smb2_ioctl(struct ksmbd_work *work)
7589 {
7590 struct smb2_ioctl_req *req;
7591 struct smb2_ioctl_rsp *rsp;
7592 unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
7593 u64 id = KSMBD_NO_FID;
7594 struct ksmbd_conn *conn = work->conn;
7595 int ret = 0;
7596
7597 if (work->next_smb2_rcv_hdr_off) {
7598 req = ksmbd_req_buf_next(work);
7599 rsp = ksmbd_resp_buf_next(work);
7600 if (!has_file_id(req->VolatileFileId)) {
7601 ksmbd_debug(SMB, "Compound request set FID = %llu\n",
7602 work->compound_fid);
7603 id = work->compound_fid;
7604 }
7605 } else {
7606 req = smb2_get_msg(work->request_buf);
7607 rsp = smb2_get_msg(work->response_buf);
7608 }
7609
7610 if (!has_file_id(id))
7611 id = req->VolatileFileId;
7612
7613 if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
7614 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7615 goto out;
7616 }
7617
7618 cnt_code = le32_to_cpu(req->CtlCode);
7619 ret = smb2_calc_max_out_buf_len(work, 48,
7620 le32_to_cpu(req->MaxOutputResponse));
7621 if (ret < 0) {
7622 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7623 goto out;
7624 }
7625 out_buf_len = (unsigned int)ret;
7626 in_buf_len = le32_to_cpu(req->InputCount);
7627
7628 switch (cnt_code) {
7629 case FSCTL_DFS_GET_REFERRALS:
7630 case FSCTL_DFS_GET_REFERRALS_EX:
7631 /* Not support DFS yet */
7632 rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
7633 goto out;
7634 case FSCTL_CREATE_OR_GET_OBJECT_ID:
7635 {
7636 struct file_object_buf_type1_ioctl_rsp *obj_buf;
7637
7638 nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
7639 obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
7640 &rsp->Buffer[0];
7641
7642 /*
7643 * TODO: This is dummy implementation to pass smbtorture
7644 * Need to check correct response later
7645 */
7646 memset(obj_buf->ObjectId, 0x0, 16);
7647 memset(obj_buf->BirthVolumeId, 0x0, 16);
7648 memset(obj_buf->BirthObjectId, 0x0, 16);
7649 memset(obj_buf->DomainId, 0x0, 16);
7650
7651 break;
7652 }
7653 case FSCTL_PIPE_TRANSCEIVE:
7654 out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
7655 nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
7656 break;
7657 case FSCTL_VALIDATE_NEGOTIATE_INFO:
7658 if (conn->dialect < SMB30_PROT_ID) {
7659 ret = -EOPNOTSUPP;
7660 goto out;
7661 }
7662
7663 if (in_buf_len < offsetof(struct validate_negotiate_info_req,
7664 Dialects)) {
7665 ret = -EINVAL;
7666 goto out;
7667 }
7668
7669 if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
7670 ret = -EINVAL;
7671 goto out;
7672 }
7673
7674 ret = fsctl_validate_negotiate_info(conn,
7675 (struct validate_negotiate_info_req *)&req->Buffer[0],
7676 (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
7677 in_buf_len);
7678 if (ret < 0)
7679 goto out;
7680
7681 nbytes = sizeof(struct validate_negotiate_info_rsp);
7682 rsp->PersistentFileId = SMB2_NO_FID;
7683 rsp->VolatileFileId = SMB2_NO_FID;
7684 break;
7685 case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
7686 ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
7687 if (ret < 0)
7688 goto out;
7689 nbytes = ret;
7690 break;
7691 case FSCTL_REQUEST_RESUME_KEY:
7692 if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
7693 ret = -EINVAL;
7694 goto out;
7695 }
7696
7697 ret = fsctl_request_resume_key(work, req,
7698 (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
7699 if (ret < 0)
7700 goto out;
7701 rsp->PersistentFileId = req->PersistentFileId;
7702 rsp->VolatileFileId = req->VolatileFileId;
7703 nbytes = sizeof(struct resume_key_ioctl_rsp);
7704 break;
7705 case FSCTL_COPYCHUNK:
7706 case FSCTL_COPYCHUNK_WRITE:
7707 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7708 ksmbd_debug(SMB,
7709 "User does not have write permission\n");
7710 ret = -EACCES;
7711 goto out;
7712 }
7713
7714 if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
7715 ret = -EINVAL;
7716 goto out;
7717 }
7718
7719 if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
7720 ret = -EINVAL;
7721 goto out;
7722 }
7723
7724 nbytes = sizeof(struct copychunk_ioctl_rsp);
7725 rsp->VolatileFileId = req->VolatileFileId;
7726 rsp->PersistentFileId = req->PersistentFileId;
7727 fsctl_copychunk(work,
7728 (struct copychunk_ioctl_req *)&req->Buffer[0],
7729 le32_to_cpu(req->CtlCode),
7730 le32_to_cpu(req->InputCount),
7731 req->VolatileFileId,
7732 req->PersistentFileId,
7733 rsp);
7734 break;
7735 case FSCTL_SET_SPARSE:
7736 if (in_buf_len < sizeof(struct file_sparse)) {
7737 ret = -EINVAL;
7738 goto out;
7739 }
7740
7741 ret = fsctl_set_sparse(work, id,
7742 (struct file_sparse *)&req->Buffer[0]);
7743 if (ret < 0)
7744 goto out;
7745 break;
7746 case FSCTL_SET_ZERO_DATA:
7747 {
7748 struct file_zero_data_information *zero_data;
7749 struct ksmbd_file *fp;
7750 loff_t off, len, bfz;
7751
7752 if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
7753 ksmbd_debug(SMB,
7754 "User does not have write permission\n");
7755 ret = -EACCES;
7756 goto out;
7757 }
7758
7759 if (in_buf_len < sizeof(struct file_zero_data_information)) {
7760 ret = -EINVAL;
7761 goto out;
7762 }
7763
7764 zero_data =
7765 (struct file_zero_data_information *)&req->Buffer[0];
7766
7767 off = le64_to_cpu(zero_data->FileOffset);
7768 bfz = le64_to_cpu(zero_data->BeyondFinalZero);
7769 if (off > bfz) {
7770 ret = -EINVAL;
7771 goto out;
7772 }
7773
7774 len = bfz - off;
7775 if (len) {
7776 fp = ksmbd_lookup_fd_fast(work, id);
7777 if (!fp) {
7778 ret = -ENOENT;
7779 goto out;
7780 }
7781
7782 ret = ksmbd_vfs_zero_data(work, fp, off, len);
7783 ksmbd_fd_put(work, fp);
7784 if (ret < 0)
7785 goto out;
7786 }
7787 break;
7788 }
7789 case FSCTL_QUERY_ALLOCATED_RANGES:
7790 if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
7791 ret = -EINVAL;
7792 goto out;
7793 }
7794
7795 ret = fsctl_query_allocated_ranges(work, id,
7796 (struct file_allocated_range_buffer *)&req->Buffer[0],
7797 (struct file_allocated_range_buffer *)&rsp->Buffer[0],
7798 out_buf_len /
7799 sizeof(struct file_allocated_range_buffer), &nbytes);
7800 if (ret == -E2BIG) {
7801 rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
7802 } else if (ret < 0) {
7803 nbytes = 0;
7804 goto out;
7805 }
7806
7807 nbytes *= sizeof(struct file_allocated_range_buffer);
7808 break;
7809 case FSCTL_GET_REPARSE_POINT:
7810 {
7811 struct reparse_data_buffer *reparse_ptr;
7812 struct ksmbd_file *fp;
7813
7814 reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
7815 fp = ksmbd_lookup_fd_fast(work, id);
7816 if (!fp) {
7817 pr_err("not found fp!!\n");
7818 ret = -ENOENT;
7819 goto out;
7820 }
7821
7822 reparse_ptr->ReparseTag =
7823 smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
7824 reparse_ptr->ReparseDataLength = 0;
7825 ksmbd_fd_put(work, fp);
7826 nbytes = sizeof(struct reparse_data_buffer);
7827 break;
7828 }
7829 case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
7830 {
7831 struct ksmbd_file *fp_in, *fp_out = NULL;
7832 struct duplicate_extents_to_file *dup_ext;
7833 loff_t src_off, dst_off, length, cloned;
7834
7835 if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
7836 ret = -EINVAL;
7837 goto out;
7838 }
7839
7840 dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
7841
7842 fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
7843 dup_ext->PersistentFileHandle);
7844 if (!fp_in) {
7845 pr_err("not found file handle in duplicate extent to file\n");
7846 ret = -ENOENT;
7847 goto out;
7848 }
7849
7850 fp_out = ksmbd_lookup_fd_fast(work, id);
7851 if (!fp_out) {
7852 pr_err("not found fp\n");
7853 ret = -ENOENT;
7854 goto dup_ext_out;
7855 }
7856
7857 src_off = le64_to_cpu(dup_ext->SourceFileOffset);
7858 dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
7859 length = le64_to_cpu(dup_ext->ByteCount);
7860 /*
7861 * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
7862 * should fall back to vfs_copy_file_range(). This could be
7863 * beneficial when re-exporting nfs/smb mount, but note that
7864 * this can result in partial copy that returns an error status.
7865 * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
7866 * fall back to vfs_copy_file_range(), should be avoided when
7867 * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
7868 */
7869 cloned = vfs_clone_file_range(fp_in->filp, src_off,
7870 fp_out->filp, dst_off, length, 0);
7871 if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
7872 ret = -EOPNOTSUPP;
7873 goto dup_ext_out;
7874 } else if (cloned != length) {
7875 cloned = vfs_copy_file_range(fp_in->filp, src_off,
7876 fp_out->filp, dst_off,
7877 length, 0);
7878 if (cloned != length) {
7879 if (cloned < 0)
7880 ret = cloned;
7881 else
7882 ret = -EINVAL;
7883 }
7884 }
7885
7886 dup_ext_out:
7887 ksmbd_fd_put(work, fp_in);
7888 ksmbd_fd_put(work, fp_out);
7889 if (ret < 0)
7890 goto out;
7891 break;
7892 }
7893 default:
7894 ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
7895 cnt_code);
7896 ret = -EOPNOTSUPP;
7897 goto out;
7898 }
7899
7900 rsp->CtlCode = cpu_to_le32(cnt_code);
7901 rsp->InputCount = cpu_to_le32(0);
7902 rsp->InputOffset = cpu_to_le32(112);
7903 rsp->OutputOffset = cpu_to_le32(112);
7904 rsp->OutputCount = cpu_to_le32(nbytes);
7905 rsp->StructureSize = cpu_to_le16(49);
7906 rsp->Reserved = cpu_to_le16(0);
7907 rsp->Flags = cpu_to_le32(0);
7908 rsp->Reserved2 = cpu_to_le32(0);
7909 inc_rfc1001_len(work->response_buf, 48 + nbytes);
7910
7911 return 0;
7912
7913 out:
7914 if (ret == -EACCES)
7915 rsp->hdr.Status = STATUS_ACCESS_DENIED;
7916 else if (ret == -ENOENT)
7917 rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
7918 else if (ret == -EOPNOTSUPP)
7919 rsp->hdr.Status = STATUS_NOT_SUPPORTED;
7920 else if (ret == -ENOSPC)
7921 rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
7922 else if (ret < 0 || rsp->hdr.Status == 0)
7923 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
7924 smb2_set_err_rsp(work);
7925 return 0;
7926 }
7927
7928 /**
7929 * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
7930 * @work: smb work containing oplock break command buffer
7931 *
7932 * Return: 0
7933 */
smb20_oplock_break_ack(struct ksmbd_work * work)7934 static void smb20_oplock_break_ack(struct ksmbd_work *work)
7935 {
7936 struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
7937 struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
7938 struct ksmbd_file *fp;
7939 struct oplock_info *opinfo = NULL;
7940 __le32 err = 0;
7941 int ret = 0;
7942 u64 volatile_id, persistent_id;
7943 char req_oplevel = 0, rsp_oplevel = 0;
7944 unsigned int oplock_change_type;
7945
7946 volatile_id = req->VolatileFid;
7947 persistent_id = req->PersistentFid;
7948 req_oplevel = req->OplockLevel;
7949 ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
7950 volatile_id, persistent_id, req_oplevel);
7951
7952 fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
7953 if (!fp) {
7954 rsp->hdr.Status = STATUS_FILE_CLOSED;
7955 smb2_set_err_rsp(work);
7956 return;
7957 }
7958
7959 opinfo = opinfo_get(fp);
7960 if (!opinfo) {
7961 pr_err("unexpected null oplock_info\n");
7962 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7963 smb2_set_err_rsp(work);
7964 ksmbd_fd_put(work, fp);
7965 return;
7966 }
7967
7968 if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
7969 rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
7970 goto err_out;
7971 }
7972
7973 if (opinfo->op_state == OPLOCK_STATE_NONE) {
7974 ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
7975 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
7976 goto err_out;
7977 }
7978
7979 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7980 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7981 (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
7982 req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
7983 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7984 oplock_change_type = OPLOCK_WRITE_TO_NONE;
7985 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
7986 req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
7987 err = STATUS_INVALID_OPLOCK_PROTOCOL;
7988 oplock_change_type = OPLOCK_READ_TO_NONE;
7989 } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
7990 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7991 err = STATUS_INVALID_DEVICE_STATE;
7992 if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7993 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7994 req_oplevel == SMB2_OPLOCK_LEVEL_II) {
7995 oplock_change_type = OPLOCK_WRITE_TO_READ;
7996 } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
7997 opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
7998 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
7999 oplock_change_type = OPLOCK_WRITE_TO_NONE;
8000 } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
8001 req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
8002 oplock_change_type = OPLOCK_READ_TO_NONE;
8003 } else {
8004 oplock_change_type = 0;
8005 }
8006 } else {
8007 oplock_change_type = 0;
8008 }
8009
8010 switch (oplock_change_type) {
8011 case OPLOCK_WRITE_TO_READ:
8012 ret = opinfo_write_to_read(opinfo);
8013 rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
8014 break;
8015 case OPLOCK_WRITE_TO_NONE:
8016 ret = opinfo_write_to_none(opinfo);
8017 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8018 break;
8019 case OPLOCK_READ_TO_NONE:
8020 ret = opinfo_read_to_none(opinfo);
8021 rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
8022 break;
8023 default:
8024 pr_err("unknown oplock change 0x%x -> 0x%x\n",
8025 opinfo->level, rsp_oplevel);
8026 }
8027
8028 if (ret < 0) {
8029 rsp->hdr.Status = err;
8030 goto err_out;
8031 }
8032
8033 opinfo_put(opinfo);
8034 ksmbd_fd_put(work, fp);
8035 opinfo->op_state = OPLOCK_STATE_NONE;
8036 wake_up_interruptible_all(&opinfo->oplock_q);
8037
8038 rsp->StructureSize = cpu_to_le16(24);
8039 rsp->OplockLevel = rsp_oplevel;
8040 rsp->Reserved = 0;
8041 rsp->Reserved2 = 0;
8042 rsp->VolatileFid = volatile_id;
8043 rsp->PersistentFid = persistent_id;
8044 inc_rfc1001_len(work->response_buf, 24);
8045 return;
8046
8047 err_out:
8048 opinfo->op_state = OPLOCK_STATE_NONE;
8049 wake_up_interruptible_all(&opinfo->oplock_q);
8050
8051 opinfo_put(opinfo);
8052 ksmbd_fd_put(work, fp);
8053 smb2_set_err_rsp(work);
8054 }
8055
check_lease_state(struct lease * lease,__le32 req_state)8056 static int check_lease_state(struct lease *lease, __le32 req_state)
8057 {
8058 if ((lease->new_state ==
8059 (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
8060 !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
8061 lease->new_state = req_state;
8062 return 0;
8063 }
8064
8065 if (lease->new_state == req_state)
8066 return 0;
8067
8068 return 1;
8069 }
8070
8071 /**
8072 * smb21_lease_break_ack() - handler for smb2.1 lease break command
8073 * @work: smb work containing lease break command buffer
8074 *
8075 * Return: 0
8076 */
smb21_lease_break_ack(struct ksmbd_work * work)8077 static void smb21_lease_break_ack(struct ksmbd_work *work)
8078 {
8079 struct ksmbd_conn *conn = work->conn;
8080 struct smb2_lease_ack *req = smb2_get_msg(work->request_buf);
8081 struct smb2_lease_ack *rsp = smb2_get_msg(work->response_buf);
8082 struct oplock_info *opinfo;
8083 __le32 err = 0;
8084 int ret = 0;
8085 unsigned int lease_change_type;
8086 __le32 lease_state;
8087 struct lease *lease;
8088
8089 ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
8090 le32_to_cpu(req->LeaseState));
8091 opinfo = lookup_lease_in_table(conn, req->LeaseKey);
8092 if (!opinfo) {
8093 ksmbd_debug(OPLOCK, "file not opened\n");
8094 smb2_set_err_rsp(work);
8095 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8096 return;
8097 }
8098 lease = opinfo->o_lease;
8099
8100 if (opinfo->op_state == OPLOCK_STATE_NONE) {
8101 pr_err("unexpected lease break state 0x%x\n",
8102 opinfo->op_state);
8103 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8104 goto err_out;
8105 }
8106
8107 if (check_lease_state(lease, req->LeaseState)) {
8108 rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
8109 ksmbd_debug(OPLOCK,
8110 "req lease state: 0x%x, expected state: 0x%x\n",
8111 req->LeaseState, lease->new_state);
8112 goto err_out;
8113 }
8114
8115 if (!atomic_read(&opinfo->breaking_cnt)) {
8116 rsp->hdr.Status = STATUS_UNSUCCESSFUL;
8117 goto err_out;
8118 }
8119
8120 /* check for bad lease state */
8121 if (req->LeaseState &
8122 (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
8123 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8124 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8125 lease_change_type = OPLOCK_WRITE_TO_NONE;
8126 else
8127 lease_change_type = OPLOCK_READ_TO_NONE;
8128 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8129 le32_to_cpu(lease->state),
8130 le32_to_cpu(req->LeaseState));
8131 } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
8132 req->LeaseState != SMB2_LEASE_NONE_LE) {
8133 err = STATUS_INVALID_OPLOCK_PROTOCOL;
8134 lease_change_type = OPLOCK_READ_TO_NONE;
8135 ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
8136 le32_to_cpu(lease->state),
8137 le32_to_cpu(req->LeaseState));
8138 } else {
8139 /* valid lease state changes */
8140 err = STATUS_INVALID_DEVICE_STATE;
8141 if (req->LeaseState == SMB2_LEASE_NONE_LE) {
8142 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8143 lease_change_type = OPLOCK_WRITE_TO_NONE;
8144 else
8145 lease_change_type = OPLOCK_READ_TO_NONE;
8146 } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
8147 if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
8148 lease_change_type = OPLOCK_WRITE_TO_READ;
8149 else
8150 lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
8151 } else {
8152 lease_change_type = 0;
8153 }
8154 }
8155
8156 switch (lease_change_type) {
8157 case OPLOCK_WRITE_TO_READ:
8158 ret = opinfo_write_to_read(opinfo);
8159 break;
8160 case OPLOCK_READ_HANDLE_TO_READ:
8161 ret = opinfo_read_handle_to_read(opinfo);
8162 break;
8163 case OPLOCK_WRITE_TO_NONE:
8164 ret = opinfo_write_to_none(opinfo);
8165 break;
8166 case OPLOCK_READ_TO_NONE:
8167 ret = opinfo_read_to_none(opinfo);
8168 break;
8169 default:
8170 ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
8171 le32_to_cpu(lease->state),
8172 le32_to_cpu(req->LeaseState));
8173 }
8174
8175 lease_state = lease->state;
8176 opinfo->op_state = OPLOCK_STATE_NONE;
8177 wake_up_interruptible_all(&opinfo->oplock_q);
8178 atomic_dec(&opinfo->breaking_cnt);
8179 wake_up_interruptible_all(&opinfo->oplock_brk);
8180 opinfo_put(opinfo);
8181
8182 if (ret < 0) {
8183 rsp->hdr.Status = err;
8184 goto err_out;
8185 }
8186
8187 rsp->StructureSize = cpu_to_le16(36);
8188 rsp->Reserved = 0;
8189 rsp->Flags = 0;
8190 memcpy(rsp->LeaseKey, req->LeaseKey, 16);
8191 rsp->LeaseState = lease_state;
8192 rsp->LeaseDuration = 0;
8193 inc_rfc1001_len(work->response_buf, 36);
8194 return;
8195
8196 err_out:
8197 opinfo->op_state = OPLOCK_STATE_NONE;
8198 wake_up_interruptible_all(&opinfo->oplock_q);
8199 atomic_dec(&opinfo->breaking_cnt);
8200 wake_up_interruptible_all(&opinfo->oplock_brk);
8201
8202 opinfo_put(opinfo);
8203 smb2_set_err_rsp(work);
8204 }
8205
8206 /**
8207 * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
8208 * @work: smb work containing oplock/lease break command buffer
8209 *
8210 * Return: 0
8211 */
smb2_oplock_break(struct ksmbd_work * work)8212 int smb2_oplock_break(struct ksmbd_work *work)
8213 {
8214 struct smb2_oplock_break *req = smb2_get_msg(work->request_buf);
8215 struct smb2_oplock_break *rsp = smb2_get_msg(work->response_buf);
8216
8217 switch (le16_to_cpu(req->StructureSize)) {
8218 case OP_BREAK_STRUCT_SIZE_20:
8219 smb20_oplock_break_ack(work);
8220 break;
8221 case OP_BREAK_STRUCT_SIZE_21:
8222 smb21_lease_break_ack(work);
8223 break;
8224 default:
8225 ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
8226 le16_to_cpu(req->StructureSize));
8227 rsp->hdr.Status = STATUS_INVALID_PARAMETER;
8228 smb2_set_err_rsp(work);
8229 }
8230
8231 return 0;
8232 }
8233
8234 /**
8235 * smb2_notify() - handler for smb2 notify request
8236 * @work: smb work containing notify command buffer
8237 *
8238 * Return: 0
8239 */
smb2_notify(struct ksmbd_work * work)8240 int smb2_notify(struct ksmbd_work *work)
8241 {
8242 struct smb2_change_notify_req *req;
8243 struct smb2_change_notify_rsp *rsp;
8244
8245 WORK_BUFFERS(work, req, rsp);
8246
8247 if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
8248 rsp->hdr.Status = STATUS_INTERNAL_ERROR;
8249 smb2_set_err_rsp(work);
8250 return 0;
8251 }
8252
8253 smb2_set_err_rsp(work);
8254 rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
8255 return 0;
8256 }
8257
8258 /**
8259 * smb2_is_sign_req() - handler for checking packet signing status
8260 * @work: smb work containing notify command buffer
8261 * @command: SMB2 command id
8262 *
8263 * Return: true if packed is signed, false otherwise
8264 */
smb2_is_sign_req(struct ksmbd_work * work,unsigned int command)8265 bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
8266 {
8267 struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
8268
8269 if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
8270 command != SMB2_NEGOTIATE_HE &&
8271 command != SMB2_SESSION_SETUP_HE &&
8272 command != SMB2_OPLOCK_BREAK_HE)
8273 return true;
8274
8275 return false;
8276 }
8277
8278 /**
8279 * smb2_check_sign_req() - handler for req packet sign processing
8280 * @work: smb work containing notify command buffer
8281 *
8282 * Return: 1 on success, 0 otherwise
8283 */
smb2_check_sign_req(struct ksmbd_work * work)8284 int smb2_check_sign_req(struct ksmbd_work *work)
8285 {
8286 struct smb2_hdr *hdr;
8287 char signature_req[SMB2_SIGNATURE_SIZE];
8288 char signature[SMB2_HMACSHA256_SIZE];
8289 struct kvec iov[1];
8290 size_t len;
8291
8292 hdr = smb2_get_msg(work->request_buf);
8293 if (work->next_smb2_rcv_hdr_off)
8294 hdr = ksmbd_req_buf_next(work);
8295
8296 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8297 len = get_rfc1002_len(work->request_buf);
8298 else if (hdr->NextCommand)
8299 len = le32_to_cpu(hdr->NextCommand);
8300 else
8301 len = get_rfc1002_len(work->request_buf) -
8302 work->next_smb2_rcv_hdr_off;
8303
8304 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8305 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8306
8307 iov[0].iov_base = (char *)&hdr->ProtocolId;
8308 iov[0].iov_len = len;
8309
8310 if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
8311 signature))
8312 return 0;
8313
8314 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8315 pr_err("bad smb2 signature\n");
8316 return 0;
8317 }
8318
8319 return 1;
8320 }
8321
8322 /**
8323 * smb2_set_sign_rsp() - handler for rsp packet sign processing
8324 * @work: smb work containing notify command buffer
8325 *
8326 */
smb2_set_sign_rsp(struct ksmbd_work * work)8327 void smb2_set_sign_rsp(struct ksmbd_work *work)
8328 {
8329 struct smb2_hdr *hdr;
8330 struct smb2_hdr *req_hdr;
8331 char signature[SMB2_HMACSHA256_SIZE];
8332 struct kvec iov[2];
8333 size_t len;
8334 int n_vec = 1;
8335
8336 hdr = smb2_get_msg(work->response_buf);
8337 if (work->next_smb2_rsp_hdr_off)
8338 hdr = ksmbd_resp_buf_next(work);
8339
8340 req_hdr = ksmbd_req_buf_next(work);
8341
8342 if (!work->next_smb2_rsp_hdr_off) {
8343 len = get_rfc1002_len(work->response_buf);
8344 if (req_hdr->NextCommand)
8345 len = ALIGN(len, 8);
8346 } else {
8347 len = get_rfc1002_len(work->response_buf) -
8348 work->next_smb2_rsp_hdr_off;
8349 len = ALIGN(len, 8);
8350 }
8351
8352 if (req_hdr->NextCommand)
8353 hdr->NextCommand = cpu_to_le32(len);
8354
8355 hdr->Flags |= SMB2_FLAGS_SIGNED;
8356 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8357
8358 iov[0].iov_base = (char *)&hdr->ProtocolId;
8359 iov[0].iov_len = len;
8360
8361 if (work->aux_payload_sz) {
8362 iov[0].iov_len -= work->aux_payload_sz;
8363
8364 iov[1].iov_base = work->aux_payload_buf;
8365 iov[1].iov_len = work->aux_payload_sz;
8366 n_vec++;
8367 }
8368
8369 if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
8370 signature))
8371 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8372 }
8373
8374 /**
8375 * smb3_check_sign_req() - handler for req packet sign processing
8376 * @work: smb work containing notify command buffer
8377 *
8378 * Return: 1 on success, 0 otherwise
8379 */
smb3_check_sign_req(struct ksmbd_work * work)8380 int smb3_check_sign_req(struct ksmbd_work *work)
8381 {
8382 struct ksmbd_conn *conn = work->conn;
8383 char *signing_key;
8384 struct smb2_hdr *hdr;
8385 struct channel *chann;
8386 char signature_req[SMB2_SIGNATURE_SIZE];
8387 char signature[SMB2_CMACAES_SIZE];
8388 struct kvec iov[1];
8389 size_t len;
8390
8391 hdr = smb2_get_msg(work->request_buf);
8392 if (work->next_smb2_rcv_hdr_off)
8393 hdr = ksmbd_req_buf_next(work);
8394
8395 if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
8396 len = get_rfc1002_len(work->request_buf);
8397 else if (hdr->NextCommand)
8398 len = le32_to_cpu(hdr->NextCommand);
8399 else
8400 len = get_rfc1002_len(work->request_buf) -
8401 work->next_smb2_rcv_hdr_off;
8402
8403 if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8404 signing_key = work->sess->smb3signingkey;
8405 } else {
8406 read_lock(&work->sess->chann_lock);
8407 chann = lookup_chann_list(work->sess, conn);
8408 if (!chann) {
8409 read_unlock(&work->sess->chann_lock);
8410 return 0;
8411 }
8412 signing_key = chann->smb3signingkey;
8413 read_unlock(&work->sess->chann_lock);
8414 }
8415
8416 if (!signing_key) {
8417 pr_err("SMB3 signing key is not generated\n");
8418 return 0;
8419 }
8420
8421 memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
8422 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8423 iov[0].iov_base = (char *)&hdr->ProtocolId;
8424 iov[0].iov_len = len;
8425
8426 if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
8427 return 0;
8428
8429 if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
8430 pr_err("bad smb2 signature\n");
8431 return 0;
8432 }
8433
8434 return 1;
8435 }
8436
8437 /**
8438 * smb3_set_sign_rsp() - handler for rsp packet sign processing
8439 * @work: smb work containing notify command buffer
8440 *
8441 */
smb3_set_sign_rsp(struct ksmbd_work * work)8442 void smb3_set_sign_rsp(struct ksmbd_work *work)
8443 {
8444 struct ksmbd_conn *conn = work->conn;
8445 struct smb2_hdr *req_hdr, *hdr;
8446 struct channel *chann;
8447 char signature[SMB2_CMACAES_SIZE];
8448 struct kvec iov[2];
8449 int n_vec = 1;
8450 size_t len;
8451 char *signing_key;
8452
8453 hdr = smb2_get_msg(work->response_buf);
8454 if (work->next_smb2_rsp_hdr_off)
8455 hdr = ksmbd_resp_buf_next(work);
8456
8457 req_hdr = ksmbd_req_buf_next(work);
8458
8459 if (!work->next_smb2_rsp_hdr_off) {
8460 len = get_rfc1002_len(work->response_buf);
8461 if (req_hdr->NextCommand)
8462 len = ALIGN(len, 8);
8463 } else {
8464 len = get_rfc1002_len(work->response_buf) -
8465 work->next_smb2_rsp_hdr_off;
8466 len = ALIGN(len, 8);
8467 }
8468
8469 if (conn->binding == false &&
8470 le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
8471 signing_key = work->sess->smb3signingkey;
8472 } else {
8473 read_lock(&work->sess->chann_lock);
8474 chann = lookup_chann_list(work->sess, work->conn);
8475 if (!chann) {
8476 read_unlock(&work->sess->chann_lock);
8477 return;
8478 }
8479 signing_key = chann->smb3signingkey;
8480 read_unlock(&work->sess->chann_lock);
8481 }
8482
8483 if (!signing_key)
8484 return;
8485
8486 if (req_hdr->NextCommand)
8487 hdr->NextCommand = cpu_to_le32(len);
8488
8489 hdr->Flags |= SMB2_FLAGS_SIGNED;
8490 memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
8491 iov[0].iov_base = (char *)&hdr->ProtocolId;
8492 iov[0].iov_len = len;
8493 if (work->aux_payload_sz) {
8494 iov[0].iov_len -= work->aux_payload_sz;
8495 iov[1].iov_base = work->aux_payload_buf;
8496 iov[1].iov_len = work->aux_payload_sz;
8497 n_vec++;
8498 }
8499
8500 if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature))
8501 memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
8502 }
8503
8504 /**
8505 * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
8506 * @work: smb work containing response buffer
8507 *
8508 */
smb3_preauth_hash_rsp(struct ksmbd_work * work)8509 void smb3_preauth_hash_rsp(struct ksmbd_work *work)
8510 {
8511 struct ksmbd_conn *conn = work->conn;
8512 struct ksmbd_session *sess = work->sess;
8513 struct smb2_hdr *req, *rsp;
8514
8515 if (conn->dialect != SMB311_PROT_ID)
8516 return;
8517
8518 WORK_BUFFERS(work, req, rsp);
8519
8520 if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
8521 conn->preauth_info)
8522 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8523 conn->preauth_info->Preauth_HashValue);
8524
8525 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
8526 __u8 *hash_value;
8527
8528 if (conn->binding) {
8529 struct preauth_session *preauth_sess;
8530
8531 preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
8532 if (!preauth_sess)
8533 return;
8534 hash_value = preauth_sess->Preauth_HashValue;
8535 } else {
8536 hash_value = sess->Preauth_HashValue;
8537 if (!hash_value)
8538 return;
8539 }
8540 ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
8541 hash_value);
8542 }
8543 }
8544
fill_transform_hdr(void * tr_buf,char * old_buf,__le16 cipher_type)8545 static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
8546 {
8547 struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
8548 struct smb2_hdr *hdr = smb2_get_msg(old_buf);
8549 unsigned int orig_len = get_rfc1002_len(old_buf);
8550
8551 /* tr_buf must be cleared by the caller */
8552 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
8553 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
8554 tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
8555 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
8556 cipher_type == SMB2_ENCRYPTION_AES256_GCM)
8557 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
8558 else
8559 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
8560 memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
8561 inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
8562 inc_rfc1001_len(tr_buf, orig_len);
8563 }
8564
smb3_encrypt_resp(struct ksmbd_work * work)8565 int smb3_encrypt_resp(struct ksmbd_work *work)
8566 {
8567 char *buf = work->response_buf;
8568 struct kvec iov[3];
8569 int rc = -ENOMEM;
8570 int buf_size = 0, rq_nvec = 2 + (work->aux_payload_sz ? 1 : 0);
8571
8572 if (ARRAY_SIZE(iov) < rq_nvec)
8573 return -ENOMEM;
8574
8575 work->tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
8576 if (!work->tr_buf)
8577 return rc;
8578
8579 /* fill transform header */
8580 fill_transform_hdr(work->tr_buf, buf, work->conn->cipher_type);
8581
8582 iov[0].iov_base = work->tr_buf;
8583 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8584 buf_size += iov[0].iov_len - 4;
8585
8586 iov[1].iov_base = buf + 4;
8587 iov[1].iov_len = get_rfc1002_len(buf);
8588 if (work->aux_payload_sz) {
8589 iov[1].iov_len = work->resp_hdr_sz - 4;
8590
8591 iov[2].iov_base = work->aux_payload_buf;
8592 iov[2].iov_len = work->aux_payload_sz;
8593 buf_size += iov[2].iov_len;
8594 }
8595 buf_size += iov[1].iov_len;
8596 work->resp_hdr_sz = iov[1].iov_len;
8597
8598 rc = ksmbd_crypt_message(work, iov, rq_nvec, 1);
8599 if (rc)
8600 return rc;
8601
8602 memmove(buf, iov[1].iov_base, iov[1].iov_len);
8603 *(__be32 *)work->tr_buf = cpu_to_be32(buf_size);
8604
8605 return rc;
8606 }
8607
smb3_is_transform_hdr(void * buf)8608 bool smb3_is_transform_hdr(void *buf)
8609 {
8610 struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
8611
8612 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
8613 }
8614
smb3_decrypt_req(struct ksmbd_work * work)8615 int smb3_decrypt_req(struct ksmbd_work *work)
8616 {
8617 struct ksmbd_session *sess;
8618 char *buf = work->request_buf;
8619 unsigned int pdu_length = get_rfc1002_len(buf);
8620 struct kvec iov[2];
8621 int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
8622 struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
8623 int rc = 0;
8624
8625 if (buf_data_size < sizeof(struct smb2_hdr)) {
8626 pr_err("Transform message is too small (%u)\n",
8627 pdu_length);
8628 return -ECONNABORTED;
8629 }
8630
8631 if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
8632 pr_err("Transform message is broken\n");
8633 return -ECONNABORTED;
8634 }
8635
8636 sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
8637 if (!sess) {
8638 pr_err("invalid session id(%llx) in transform header\n",
8639 le64_to_cpu(tr_hdr->SessionId));
8640 return -ECONNABORTED;
8641 }
8642
8643 iov[0].iov_base = buf;
8644 iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
8645 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
8646 iov[1].iov_len = buf_data_size;
8647 rc = ksmbd_crypt_message(work, iov, 2, 0);
8648 if (rc)
8649 return rc;
8650
8651 memmove(buf + 4, iov[1].iov_base, buf_data_size);
8652 *(__be32 *)buf = cpu_to_be32(buf_data_size);
8653
8654 return rc;
8655 }
8656
smb3_11_final_sess_setup_resp(struct ksmbd_work * work)8657 bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
8658 {
8659 struct ksmbd_conn *conn = work->conn;
8660 struct ksmbd_session *sess = work->sess;
8661 struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
8662
8663 if (conn->dialect < SMB30_PROT_ID)
8664 return false;
8665
8666 if (work->next_smb2_rcv_hdr_off)
8667 rsp = ksmbd_resp_buf_next(work);
8668
8669 if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
8670 sess->user && !user_guest(sess->user) &&
8671 rsp->Status == STATUS_SUCCESS)
8672 return true;
8673 return false;
8674 }
8675