1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  *  SMB2 version specific operations
4  *
5  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
6  */
7 
8 #include <linux/pagemap.h>
9 #include <linux/vfs.h>
10 #include <linux/falloc.h>
11 #include <linux/scatterlist.h>
12 #include <linux/uuid.h>
13 #include <linux/sort.h>
14 #include <crypto/aead.h>
15 #include <linux/fiemap.h>
16 #include <uapi/linux/magic.h>
17 #include "cifsfs.h"
18 #include "cifsglob.h"
19 #include "smb2pdu.h"
20 #include "smb2proto.h"
21 #include "cifsproto.h"
22 #include "cifs_debug.h"
23 #include "cifs_unicode.h"
24 #include "smb2status.h"
25 #include "smb2glob.h"
26 #include "cifs_ioctl.h"
27 #include "smbdirect.h"
28 #include "fscache.h"
29 #include "fs_context.h"
30 #include "cached_dir.h"
31 
32 /* Change credits for different ops and return the total number of credits */
33 static int
change_conf(struct TCP_Server_Info * server)34 change_conf(struct TCP_Server_Info *server)
35 {
36 	server->credits += server->echo_credits + server->oplock_credits;
37 	if (server->credits > server->max_credits)
38 		server->credits = server->max_credits;
39 	server->oplock_credits = server->echo_credits = 0;
40 	switch (server->credits) {
41 	case 0:
42 		return 0;
43 	case 1:
44 		server->echoes = false;
45 		server->oplocks = false;
46 		break;
47 	case 2:
48 		server->echoes = true;
49 		server->oplocks = false;
50 		server->echo_credits = 1;
51 		break;
52 	default:
53 		server->echoes = true;
54 		if (enable_oplocks) {
55 			server->oplocks = true;
56 			server->oplock_credits = 1;
57 		} else
58 			server->oplocks = false;
59 
60 		server->echo_credits = 1;
61 	}
62 	server->credits -= server->echo_credits + server->oplock_credits;
63 	return server->credits + server->echo_credits + server->oplock_credits;
64 }
65 
66 static void
smb2_add_credits(struct TCP_Server_Info * server,const struct cifs_credits * credits,const int optype)67 smb2_add_credits(struct TCP_Server_Info *server,
68 		 const struct cifs_credits *credits, const int optype)
69 {
70 	int *val, rc = -1;
71 	int scredits, in_flight;
72 	unsigned int add = credits->value;
73 	unsigned int instance = credits->instance;
74 	bool reconnect_detected = false;
75 	bool reconnect_with_invalid_credits = false;
76 
77 	spin_lock(&server->req_lock);
78 	val = server->ops->get_credits_field(server, optype);
79 
80 	/* eg found case where write overlapping reconnect messed up credits */
81 	if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
82 		reconnect_with_invalid_credits = true;
83 
84 	if ((instance == 0) || (instance == server->reconnect_instance))
85 		*val += add;
86 	else
87 		reconnect_detected = true;
88 
89 	if (*val > 65000) {
90 		*val = 65000; /* Don't get near 64K credits, avoid srv bugs */
91 		pr_warn_once("server overflowed SMB3 credits\n");
92 		trace_smb3_overflow_credits(server->CurrentMid,
93 					    server->conn_id, server->hostname, *val,
94 					    add, server->in_flight);
95 	}
96 	WARN_ON_ONCE(server->in_flight == 0);
97 	server->in_flight--;
98 	if (server->in_flight == 0 &&
99 	   ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
100 	   ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
101 		rc = change_conf(server);
102 	/*
103 	 * Sometimes server returns 0 credits on oplock break ack - we need to
104 	 * rebalance credits in this case.
105 	 */
106 	else if (server->in_flight > 0 && server->oplock_credits == 0 &&
107 		 server->oplocks) {
108 		if (server->credits > 1) {
109 			server->credits--;
110 			server->oplock_credits++;
111 		}
112 	} else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
113 		   ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
114 		/* if now have too many oplock credits, rebalance so don't starve normal ops */
115 		change_conf(server);
116 
117 	scredits = *val;
118 	in_flight = server->in_flight;
119 	spin_unlock(&server->req_lock);
120 	wake_up(&server->request_q);
121 
122 	if (reconnect_detected) {
123 		trace_smb3_reconnect_detected(server->CurrentMid,
124 			server->conn_id, server->hostname, scredits, add, in_flight);
125 
126 		cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
127 			 add, instance);
128 	}
129 
130 	if (reconnect_with_invalid_credits) {
131 		trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
132 			server->conn_id, server->hostname, scredits, add, in_flight);
133 		cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
134 			 optype, scredits, add);
135 	}
136 
137 	spin_lock(&server->srv_lock);
138 	if (server->tcpStatus == CifsNeedReconnect
139 	    || server->tcpStatus == CifsExiting) {
140 		spin_unlock(&server->srv_lock);
141 		return;
142 	}
143 	spin_unlock(&server->srv_lock);
144 
145 	switch (rc) {
146 	case -1:
147 		/* change_conf hasn't been executed */
148 		break;
149 	case 0:
150 		cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
151 		break;
152 	case 1:
153 		cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
154 		break;
155 	case 2:
156 		cifs_dbg(FYI, "disabling oplocks\n");
157 		break;
158 	default:
159 		/* change_conf rebalanced credits for different types */
160 		break;
161 	}
162 
163 	trace_smb3_add_credits(server->CurrentMid,
164 			server->conn_id, server->hostname, scredits, add, in_flight);
165 	cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
166 }
167 
168 static void
smb2_set_credits(struct TCP_Server_Info * server,const int val)169 smb2_set_credits(struct TCP_Server_Info *server, const int val)
170 {
171 	int scredits, in_flight;
172 
173 	spin_lock(&server->req_lock);
174 	server->credits = val;
175 	if (val == 1) {
176 		server->reconnect_instance++;
177 		/*
178 		 * ChannelSequence updated for all channels in primary channel so that consistent
179 		 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
180 		 */
181 		if (SERVER_IS_CHAN(server))
182 			server->primary_server->channel_sequence_num++;
183 		else
184 			server->channel_sequence_num++;
185 	}
186 	scredits = server->credits;
187 	in_flight = server->in_flight;
188 	spin_unlock(&server->req_lock);
189 
190 	trace_smb3_set_credits(server->CurrentMid,
191 			server->conn_id, server->hostname, scredits, val, in_flight);
192 	cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
193 
194 	/* don't log while holding the lock */
195 	if (val == 1)
196 		cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
197 }
198 
199 static int *
smb2_get_credits_field(struct TCP_Server_Info * server,const int optype)200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
201 {
202 	switch (optype) {
203 	case CIFS_ECHO_OP:
204 		return &server->echo_credits;
205 	case CIFS_OBREAK_OP:
206 		return &server->oplock_credits;
207 	default:
208 		return &server->credits;
209 	}
210 }
211 
212 static unsigned int
smb2_get_credits(struct mid_q_entry * mid)213 smb2_get_credits(struct mid_q_entry *mid)
214 {
215 	return mid->credits_received;
216 }
217 
218 static int
smb2_wait_mtu_credits(struct TCP_Server_Info * server,unsigned int size,unsigned int * num,struct cifs_credits * credits)219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
220 		      unsigned int *num, struct cifs_credits *credits)
221 {
222 	int rc = 0;
223 	unsigned int scredits, in_flight;
224 
225 	spin_lock(&server->req_lock);
226 	while (1) {
227 		spin_unlock(&server->req_lock);
228 
229 		spin_lock(&server->srv_lock);
230 		if (server->tcpStatus == CifsExiting) {
231 			spin_unlock(&server->srv_lock);
232 			return -ENOENT;
233 		}
234 		spin_unlock(&server->srv_lock);
235 
236 		spin_lock(&server->req_lock);
237 		if (server->credits <= 0) {
238 			spin_unlock(&server->req_lock);
239 			cifs_num_waiters_inc(server);
240 			rc = wait_event_killable(server->request_q,
241 				has_credits(server, &server->credits, 1));
242 			cifs_num_waiters_dec(server);
243 			if (rc)
244 				return rc;
245 			spin_lock(&server->req_lock);
246 		} else {
247 			scredits = server->credits;
248 			/* can deadlock with reopen */
249 			if (scredits <= 8) {
250 				*num = SMB2_MAX_BUFFER_SIZE;
251 				credits->value = 0;
252 				credits->instance = 0;
253 				break;
254 			}
255 
256 			/* leave some credits for reopen and other ops */
257 			scredits -= 8;
258 			*num = min_t(unsigned int, size,
259 				     scredits * SMB2_MAX_BUFFER_SIZE);
260 
261 			credits->value =
262 				DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
263 			credits->instance = server->reconnect_instance;
264 			server->credits -= credits->value;
265 			server->in_flight++;
266 			if (server->in_flight > server->max_in_flight)
267 				server->max_in_flight = server->in_flight;
268 			break;
269 		}
270 	}
271 	scredits = server->credits;
272 	in_flight = server->in_flight;
273 	spin_unlock(&server->req_lock);
274 
275 	trace_smb3_wait_credits(server->CurrentMid,
276 			server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
277 	cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
278 			__func__, credits->value, scredits);
279 
280 	return rc;
281 }
282 
283 static int
smb2_adjust_credits(struct TCP_Server_Info * server,struct cifs_credits * credits,const unsigned int payload_size)284 smb2_adjust_credits(struct TCP_Server_Info *server,
285 		    struct cifs_credits *credits,
286 		    const unsigned int payload_size)
287 {
288 	int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
289 	int scredits, in_flight;
290 
291 	if (!credits->value || credits->value == new_val)
292 		return 0;
293 
294 	if (credits->value < new_val) {
295 		trace_smb3_too_many_credits(server->CurrentMid,
296 				server->conn_id, server->hostname, 0, credits->value - new_val, 0);
297 		cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
298 				credits->value, new_val);
299 
300 		return -EOPNOTSUPP;
301 	}
302 
303 	spin_lock(&server->req_lock);
304 
305 	if (server->reconnect_instance != credits->instance) {
306 		scredits = server->credits;
307 		in_flight = server->in_flight;
308 		spin_unlock(&server->req_lock);
309 
310 		trace_smb3_reconnect_detected(server->CurrentMid,
311 			server->conn_id, server->hostname, scredits,
312 			credits->value - new_val, in_flight);
313 		cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
314 			 credits->value - new_val);
315 		return -EAGAIN;
316 	}
317 
318 	server->credits += credits->value - new_val;
319 	scredits = server->credits;
320 	in_flight = server->in_flight;
321 	spin_unlock(&server->req_lock);
322 	wake_up(&server->request_q);
323 
324 	trace_smb3_adj_credits(server->CurrentMid,
325 			server->conn_id, server->hostname, scredits,
326 			credits->value - new_val, in_flight);
327 	cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
328 			__func__, credits->value - new_val, scredits);
329 
330 	credits->value = new_val;
331 
332 	return 0;
333 }
334 
335 static __u64
smb2_get_next_mid(struct TCP_Server_Info * server)336 smb2_get_next_mid(struct TCP_Server_Info *server)
337 {
338 	__u64 mid;
339 	/* for SMB2 we need the current value */
340 	spin_lock(&server->mid_lock);
341 	mid = server->CurrentMid++;
342 	spin_unlock(&server->mid_lock);
343 	return mid;
344 }
345 
346 static void
smb2_revert_current_mid(struct TCP_Server_Info * server,const unsigned int val)347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
348 {
349 	spin_lock(&server->mid_lock);
350 	if (server->CurrentMid >= val)
351 		server->CurrentMid -= val;
352 	spin_unlock(&server->mid_lock);
353 }
354 
355 static struct mid_q_entry *
__smb2_find_mid(struct TCP_Server_Info * server,char * buf,bool dequeue)356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
357 {
358 	struct mid_q_entry *mid;
359 	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
360 	__u64 wire_mid = le64_to_cpu(shdr->MessageId);
361 
362 	if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
363 		cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
364 		return NULL;
365 	}
366 
367 	spin_lock(&server->mid_lock);
368 	list_for_each_entry(mid, &server->pending_mid_q, qhead) {
369 		if ((mid->mid == wire_mid) &&
370 		    (mid->mid_state == MID_REQUEST_SUBMITTED) &&
371 		    (mid->command == shdr->Command)) {
372 			kref_get(&mid->refcount);
373 			if (dequeue) {
374 				list_del_init(&mid->qhead);
375 				mid->mid_flags |= MID_DELETED;
376 			}
377 			spin_unlock(&server->mid_lock);
378 			return mid;
379 		}
380 	}
381 	spin_unlock(&server->mid_lock);
382 	return NULL;
383 }
384 
385 static struct mid_q_entry *
smb2_find_mid(struct TCP_Server_Info * server,char * buf)386 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
387 {
388 	return __smb2_find_mid(server, buf, false);
389 }
390 
391 static struct mid_q_entry *
smb2_find_dequeue_mid(struct TCP_Server_Info * server,char * buf)392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
393 {
394 	return __smb2_find_mid(server, buf, true);
395 }
396 
397 static void
smb2_dump_detail(void * buf,struct TCP_Server_Info * server)398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
399 {
400 #ifdef CONFIG_CIFS_DEBUG2
401 	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
402 
403 	cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
404 		 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
405 		 shdr->Id.SyncId.ProcessId);
406 	if (!server->ops->check_message(buf, server->total_read, server)) {
407 		cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
408 				server->ops->calc_smb_size(buf));
409 	}
410 #endif
411 }
412 
413 static bool
smb2_need_neg(struct TCP_Server_Info * server)414 smb2_need_neg(struct TCP_Server_Info *server)
415 {
416 	return server->max_read == 0;
417 }
418 
419 static int
smb2_negotiate(const unsigned int xid,struct cifs_ses * ses,struct TCP_Server_Info * server)420 smb2_negotiate(const unsigned int xid,
421 	       struct cifs_ses *ses,
422 	       struct TCP_Server_Info *server)
423 {
424 	int rc;
425 
426 	spin_lock(&server->mid_lock);
427 	server->CurrentMid = 0;
428 	spin_unlock(&server->mid_lock);
429 	rc = SMB2_negotiate(xid, ses, server);
430 	/* BB we probably don't need to retry with modern servers */
431 	if (rc == -EAGAIN)
432 		rc = -EHOSTDOWN;
433 	return rc;
434 }
435 
436 static unsigned int
smb2_negotiate_wsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
438 {
439 	struct TCP_Server_Info *server = tcon->ses->server;
440 	unsigned int wsize;
441 
442 	/* start with specified wsize, or default */
443 	wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
444 	wsize = min_t(unsigned int, wsize, server->max_write);
445 	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
446 		wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
447 
448 	return wsize;
449 }
450 
451 static unsigned int
smb3_negotiate_wsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
453 {
454 	struct TCP_Server_Info *server = tcon->ses->server;
455 	unsigned int wsize;
456 
457 	/* start with specified wsize, or default */
458 	wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
459 	wsize = min_t(unsigned int, wsize, server->max_write);
460 #ifdef CONFIG_CIFS_SMB_DIRECT
461 	if (server->rdma) {
462 		if (server->sign)
463 			/*
464 			 * Account for SMB2 data transfer packet header and
465 			 * possible encryption header
466 			 */
467 			wsize = min_t(unsigned int,
468 				wsize,
469 				server->smbd_conn->max_fragmented_send_size -
470 					SMB2_READWRITE_PDU_HEADER_SIZE -
471 					sizeof(struct smb2_transform_hdr));
472 		else
473 			wsize = min_t(unsigned int,
474 				wsize, server->smbd_conn->max_readwrite_size);
475 	}
476 #endif
477 	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
478 		wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
479 
480 	return wsize;
481 }
482 
483 static unsigned int
smb2_negotiate_rsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
485 {
486 	struct TCP_Server_Info *server = tcon->ses->server;
487 	unsigned int rsize;
488 
489 	/* start with specified rsize, or default */
490 	rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
491 	rsize = min_t(unsigned int, rsize, server->max_read);
492 
493 	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
494 		rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
495 
496 	return rsize;
497 }
498 
499 static unsigned int
smb3_negotiate_rsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
501 {
502 	struct TCP_Server_Info *server = tcon->ses->server;
503 	unsigned int rsize;
504 
505 	/* start with specified rsize, or default */
506 	rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
507 	rsize = min_t(unsigned int, rsize, server->max_read);
508 #ifdef CONFIG_CIFS_SMB_DIRECT
509 	if (server->rdma) {
510 		if (server->sign)
511 			/*
512 			 * Account for SMB2 data transfer packet header and
513 			 * possible encryption header
514 			 */
515 			rsize = min_t(unsigned int,
516 				rsize,
517 				server->smbd_conn->max_fragmented_recv_size -
518 					SMB2_READWRITE_PDU_HEADER_SIZE -
519 					sizeof(struct smb2_transform_hdr));
520 		else
521 			rsize = min_t(unsigned int,
522 				rsize, server->smbd_conn->max_readwrite_size);
523 	}
524 #endif
525 
526 	if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
527 		rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
528 
529 	return rsize;
530 }
531 
532 /*
533  * compare two interfaces a and b
534  * return 0 if everything matches.
535  * return 1 if a is rdma capable, or rss capable, or has higher link speed
536  * return -1 otherwise.
537  */
538 static int
iface_cmp(struct cifs_server_iface * a,struct cifs_server_iface * b)539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
540 {
541 	int cmp_ret = 0;
542 
543 	WARN_ON(!a || !b);
544 	if (a->rdma_capable == b->rdma_capable) {
545 		if (a->rss_capable == b->rss_capable) {
546 			if (a->speed == b->speed) {
547 				cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
548 							  (struct sockaddr *) &b->sockaddr);
549 				if (!cmp_ret)
550 					return 0;
551 				else if (cmp_ret > 0)
552 					return 1;
553 				else
554 					return -1;
555 			} else if (a->speed > b->speed)
556 				return 1;
557 			else
558 				return -1;
559 		} else if (a->rss_capable > b->rss_capable)
560 			return 1;
561 		else
562 			return -1;
563 	} else if (a->rdma_capable > b->rdma_capable)
564 		return 1;
565 	else
566 		return -1;
567 }
568 
569 static int
parse_server_interfaces(struct network_interface_info_ioctl_rsp * buf,size_t buf_len,struct cifs_ses * ses,bool in_mount)570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
571 			size_t buf_len, struct cifs_ses *ses, bool in_mount)
572 {
573 	struct network_interface_info_ioctl_rsp *p;
574 	struct sockaddr_in *addr4;
575 	struct sockaddr_in6 *addr6;
576 	struct iface_info_ipv4 *p4;
577 	struct iface_info_ipv6 *p6;
578 	struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
579 	struct cifs_server_iface tmp_iface;
580 	ssize_t bytes_left;
581 	size_t next = 0;
582 	int nb_iface = 0;
583 	int rc = 0, ret = 0;
584 
585 	bytes_left = buf_len;
586 	p = buf;
587 
588 	spin_lock(&ses->iface_lock);
589 	/* do not query too frequently, this time with lock held */
590 	if (ses->iface_last_update &&
591 	    time_before(jiffies, ses->iface_last_update +
592 			(SMB_INTERFACE_POLL_INTERVAL * HZ))) {
593 		spin_unlock(&ses->iface_lock);
594 		return 0;
595 	}
596 
597 	/*
598 	 * Go through iface_list and mark them as inactive
599 	 */
600 	list_for_each_entry_safe(iface, niface, &ses->iface_list,
601 				 iface_head)
602 		iface->is_active = 0;
603 
604 	spin_unlock(&ses->iface_lock);
605 
606 	/*
607 	 * Samba server e.g. can return an empty interface list in some cases,
608 	 * which would only be a problem if we were requesting multichannel
609 	 */
610 	if (bytes_left == 0) {
611 		/* avoid spamming logs every 10 minutes, so log only in mount */
612 		if ((ses->chan_max > 1) && in_mount)
613 			cifs_dbg(VFS,
614 				 "multichannel not available\n"
615 				 "Empty network interface list returned by server %s\n",
616 				 ses->server->hostname);
617 		rc = -EOPNOTSUPP;
618 		ses->iface_last_update = jiffies;
619 		goto out;
620 	}
621 
622 	while (bytes_left >= (ssize_t)sizeof(*p)) {
623 		memset(&tmp_iface, 0, sizeof(tmp_iface));
624 		tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
625 		tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
626 		tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
627 
628 		switch (p->Family) {
629 		/*
630 		 * The kernel and wire socket structures have the same
631 		 * layout and use network byte order but make the
632 		 * conversion explicit in case either one changes.
633 		 */
634 		case INTERNETWORK:
635 			addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
636 			p4 = (struct iface_info_ipv4 *)p->Buffer;
637 			addr4->sin_family = AF_INET;
638 			memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
639 
640 			/* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
641 			addr4->sin_port = cpu_to_be16(CIFS_PORT);
642 
643 			cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
644 				 &addr4->sin_addr);
645 			break;
646 		case INTERNETWORKV6:
647 			addr6 =	(struct sockaddr_in6 *)&tmp_iface.sockaddr;
648 			p6 = (struct iface_info_ipv6 *)p->Buffer;
649 			addr6->sin6_family = AF_INET6;
650 			memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
651 
652 			/* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
653 			addr6->sin6_flowinfo = 0;
654 			addr6->sin6_scope_id = 0;
655 			addr6->sin6_port = cpu_to_be16(CIFS_PORT);
656 
657 			cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
658 				 &addr6->sin6_addr);
659 			break;
660 		default:
661 			cifs_dbg(VFS,
662 				 "%s: skipping unsupported socket family\n",
663 				 __func__);
664 			goto next_iface;
665 		}
666 
667 		/*
668 		 * The iface_list is assumed to be sorted by speed.
669 		 * Check if the new interface exists in that list.
670 		 * NEVER change iface. it could be in use.
671 		 * Add a new one instead
672 		 */
673 		spin_lock(&ses->iface_lock);
674 		list_for_each_entry_safe(iface, niface, &ses->iface_list,
675 					 iface_head) {
676 			ret = iface_cmp(iface, &tmp_iface);
677 			if (!ret) {
678 				iface->is_active = 1;
679 				spin_unlock(&ses->iface_lock);
680 				goto next_iface;
681 			} else if (ret < 0) {
682 				/* all remaining ifaces are slower */
683 				kref_get(&iface->refcount);
684 				break;
685 			}
686 		}
687 		spin_unlock(&ses->iface_lock);
688 
689 		/* no match. insert the entry in the list */
690 		info = kmalloc(sizeof(struct cifs_server_iface),
691 			       GFP_KERNEL);
692 		if (!info) {
693 			rc = -ENOMEM;
694 			goto out;
695 		}
696 		memcpy(info, &tmp_iface, sizeof(tmp_iface));
697 
698 		/* add this new entry to the list */
699 		kref_init(&info->refcount);
700 		info->is_active = 1;
701 
702 		cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
703 		cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
704 		cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
705 			 le32_to_cpu(p->Capability));
706 
707 		spin_lock(&ses->iface_lock);
708 		if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
709 			list_add_tail(&info->iface_head, &iface->iface_head);
710 			kref_put(&iface->refcount, release_iface);
711 		} else
712 			list_add_tail(&info->iface_head, &ses->iface_list);
713 
714 		ses->iface_count++;
715 		spin_unlock(&ses->iface_lock);
716 next_iface:
717 		nb_iface++;
718 		next = le32_to_cpu(p->Next);
719 		if (!next) {
720 			bytes_left -= sizeof(*p);
721 			break;
722 		}
723 		p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
724 		bytes_left -= next;
725 	}
726 
727 	if (!nb_iface) {
728 		cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
729 		rc = -EINVAL;
730 		goto out;
731 	}
732 
733 	/* Azure rounds the buffer size up 8, to a 16 byte boundary */
734 	if ((bytes_left > 8) || p->Next)
735 		cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
736 
737 	ses->iface_last_update = jiffies;
738 
739 out:
740 	/*
741 	 * Go through the list again and put the inactive entries
742 	 */
743 	spin_lock(&ses->iface_lock);
744 	list_for_each_entry_safe(iface, niface, &ses->iface_list,
745 				 iface_head) {
746 		if (!iface->is_active) {
747 			list_del(&iface->iface_head);
748 			kref_put(&iface->refcount, release_iface);
749 			ses->iface_count--;
750 		}
751 	}
752 	spin_unlock(&ses->iface_lock);
753 
754 	return rc;
755 }
756 
757 int
SMB3_request_interfaces(const unsigned int xid,struct cifs_tcon * tcon,bool in_mount)758 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
759 {
760 	int rc;
761 	unsigned int ret_data_len = 0;
762 	struct network_interface_info_ioctl_rsp *out_buf = NULL;
763 	struct cifs_ses *ses = tcon->ses;
764 	struct TCP_Server_Info *pserver;
765 
766 	/* do not query too frequently */
767 	if (ses->iface_last_update &&
768 	    time_before(jiffies, ses->iface_last_update +
769 			(SMB_INTERFACE_POLL_INTERVAL * HZ)))
770 		return 0;
771 
772 	rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
773 			FSCTL_QUERY_NETWORK_INTERFACE_INFO,
774 			NULL /* no data input */, 0 /* no data input */,
775 			CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
776 	if (rc == -EOPNOTSUPP) {
777 		cifs_dbg(FYI,
778 			 "server does not support query network interfaces\n");
779 		ret_data_len = 0;
780 	} else if (rc != 0) {
781 		cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
782 		goto out;
783 	}
784 
785 	rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
786 	if (rc)
787 		goto out;
788 
789 	/* check if iface is still active */
790 	spin_lock(&ses->chan_lock);
791 	pserver = ses->chans[0].server;
792 	if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
793 		spin_unlock(&ses->chan_lock);
794 		cifs_chan_update_iface(ses, pserver);
795 		spin_lock(&ses->chan_lock);
796 	}
797 	spin_unlock(&ses->chan_lock);
798 
799 out:
800 	kfree(out_buf);
801 	return rc;
802 }
803 
804 static void
smb3_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)805 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
806 	      struct cifs_sb_info *cifs_sb)
807 {
808 	int rc;
809 	__le16 srch_path = 0; /* Null - open root of share */
810 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
811 	struct cifs_open_parms oparms;
812 	struct cifs_fid fid;
813 	struct cached_fid *cfid = NULL;
814 
815 	oparms = (struct cifs_open_parms) {
816 		.tcon = tcon,
817 		.path = "",
818 		.desired_access = FILE_READ_ATTRIBUTES,
819 		.disposition = FILE_OPEN,
820 		.create_options = cifs_create_options(cifs_sb, 0),
821 		.fid = &fid,
822 	};
823 
824 	rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
825 	if (rc == 0)
826 		memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
827 	else
828 		rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
829 			       NULL, NULL);
830 	if (rc)
831 		return;
832 
833 	SMB3_request_interfaces(xid, tcon, true /* called during  mount */);
834 
835 	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
836 			FS_ATTRIBUTE_INFORMATION);
837 	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
838 			FS_DEVICE_INFORMATION);
839 	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
840 			FS_VOLUME_INFORMATION);
841 	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
842 			FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
843 	if (cfid == NULL)
844 		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
845 	else
846 		close_cached_dir(cfid);
847 }
848 
849 static void
smb2_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)850 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
851 	      struct cifs_sb_info *cifs_sb)
852 {
853 	int rc;
854 	__le16 srch_path = 0; /* Null - open root of share */
855 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
856 	struct cifs_open_parms oparms;
857 	struct cifs_fid fid;
858 
859 	oparms = (struct cifs_open_parms) {
860 		.tcon = tcon,
861 		.path = "",
862 		.desired_access = FILE_READ_ATTRIBUTES,
863 		.disposition = FILE_OPEN,
864 		.create_options = cifs_create_options(cifs_sb, 0),
865 		.fid = &fid,
866 	};
867 
868 	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
869 		       NULL, NULL);
870 	if (rc)
871 		return;
872 
873 	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
874 			FS_ATTRIBUTE_INFORMATION);
875 	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
876 			FS_DEVICE_INFORMATION);
877 	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
878 }
879 
880 static int
smb2_is_path_accessible(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path)881 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
882 			struct cifs_sb_info *cifs_sb, const char *full_path)
883 {
884 	__le16 *utf16_path;
885 	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
886 	int err_buftype = CIFS_NO_BUFFER;
887 	struct cifs_open_parms oparms;
888 	struct kvec err_iov = {};
889 	struct cifs_fid fid;
890 	struct cached_fid *cfid;
891 	bool islink;
892 	int rc, rc2;
893 
894 	rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
895 	if (!rc) {
896 		if (cfid->has_lease) {
897 			close_cached_dir(cfid);
898 			return 0;
899 		}
900 		close_cached_dir(cfid);
901 	}
902 
903 	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
904 	if (!utf16_path)
905 		return -ENOMEM;
906 
907 	oparms = (struct cifs_open_parms) {
908 		.tcon = tcon,
909 		.path = full_path,
910 		.desired_access = FILE_READ_ATTRIBUTES,
911 		.disposition = FILE_OPEN,
912 		.create_options = cifs_create_options(cifs_sb, 0),
913 		.fid = &fid,
914 	};
915 
916 	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
917 		       &err_iov, &err_buftype);
918 	if (rc) {
919 		struct smb2_hdr *hdr = err_iov.iov_base;
920 
921 		if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
922 			goto out;
923 
924 		if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
925 			rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
926 							     full_path, &islink);
927 			if (rc2) {
928 				rc = rc2;
929 				goto out;
930 			}
931 			if (islink)
932 				rc = -EREMOTE;
933 		}
934 		if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
935 		    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
936 			rc = -EOPNOTSUPP;
937 		goto out;
938 	}
939 
940 	rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
941 
942 out:
943 	free_rsp_buf(err_buftype, err_iov.iov_base);
944 	kfree(utf16_path);
945 	return rc;
946 }
947 
smb2_get_srv_inum(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,u64 * uniqueid,struct cifs_open_info_data * data)948 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
949 			     struct cifs_sb_info *cifs_sb, const char *full_path,
950 			     u64 *uniqueid, struct cifs_open_info_data *data)
951 {
952 	*uniqueid = le64_to_cpu(data->fi.IndexNumber);
953 	return 0;
954 }
955 
smb2_query_file_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct cifs_open_info_data * data)956 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
957 				struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
958 {
959 	struct cifs_fid *fid = &cfile->fid;
960 
961 	if (cfile->symlink_target) {
962 		data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
963 		if (!data->symlink_target)
964 			return -ENOMEM;
965 	}
966 	return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
967 }
968 
969 #ifdef CONFIG_CIFS_XATTR
970 static ssize_t
move_smb2_ea_to_cifs(char * dst,size_t dst_size,struct smb2_file_full_ea_info * src,size_t src_size,const unsigned char * ea_name)971 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
972 		     struct smb2_file_full_ea_info *src, size_t src_size,
973 		     const unsigned char *ea_name)
974 {
975 	int rc = 0;
976 	unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
977 	char *name, *value;
978 	size_t buf_size = dst_size;
979 	size_t name_len, value_len, user_name_len;
980 
981 	while (src_size > 0) {
982 		name_len = (size_t)src->ea_name_length;
983 		value_len = (size_t)le16_to_cpu(src->ea_value_length);
984 
985 		if (name_len == 0)
986 			break;
987 
988 		if (src_size < 8 + name_len + 1 + value_len) {
989 			cifs_dbg(FYI, "EA entry goes beyond length of list\n");
990 			rc = -EIO;
991 			goto out;
992 		}
993 
994 		name = &src->ea_data[0];
995 		value = &src->ea_data[src->ea_name_length + 1];
996 
997 		if (ea_name) {
998 			if (ea_name_len == name_len &&
999 			    memcmp(ea_name, name, name_len) == 0) {
1000 				rc = value_len;
1001 				if (dst_size == 0)
1002 					goto out;
1003 				if (dst_size < value_len) {
1004 					rc = -ERANGE;
1005 					goto out;
1006 				}
1007 				memcpy(dst, value, value_len);
1008 				goto out;
1009 			}
1010 		} else {
1011 			/* 'user.' plus a terminating null */
1012 			user_name_len = 5 + 1 + name_len;
1013 
1014 			if (buf_size == 0) {
1015 				/* skip copy - calc size only */
1016 				rc += user_name_len;
1017 			} else if (dst_size >= user_name_len) {
1018 				dst_size -= user_name_len;
1019 				memcpy(dst, "user.", 5);
1020 				dst += 5;
1021 				memcpy(dst, src->ea_data, name_len);
1022 				dst += name_len;
1023 				*dst = 0;
1024 				++dst;
1025 				rc += user_name_len;
1026 			} else {
1027 				/* stop before overrun buffer */
1028 				rc = -ERANGE;
1029 				break;
1030 			}
1031 		}
1032 
1033 		if (!src->next_entry_offset)
1034 			break;
1035 
1036 		if (src_size < le32_to_cpu(src->next_entry_offset)) {
1037 			/* stop before overrun buffer */
1038 			rc = -ERANGE;
1039 			break;
1040 		}
1041 		src_size -= le32_to_cpu(src->next_entry_offset);
1042 		src = (void *)((char *)src +
1043 			       le32_to_cpu(src->next_entry_offset));
1044 	}
1045 
1046 	/* didn't find the named attribute */
1047 	if (ea_name)
1048 		rc = -ENODATA;
1049 
1050 out:
1051 	return (ssize_t)rc;
1052 }
1053 
1054 static ssize_t
smb2_query_eas(const unsigned int xid,struct cifs_tcon * tcon,const unsigned char * path,const unsigned char * ea_name,char * ea_data,size_t buf_size,struct cifs_sb_info * cifs_sb)1055 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1056 	       const unsigned char *path, const unsigned char *ea_name,
1057 	       char *ea_data, size_t buf_size,
1058 	       struct cifs_sb_info *cifs_sb)
1059 {
1060 	int rc;
1061 	struct kvec rsp_iov = {NULL, 0};
1062 	int buftype = CIFS_NO_BUFFER;
1063 	struct smb2_query_info_rsp *rsp;
1064 	struct smb2_file_full_ea_info *info = NULL;
1065 
1066 	rc = smb2_query_info_compound(xid, tcon, path,
1067 				      FILE_READ_EA,
1068 				      FILE_FULL_EA_INFORMATION,
1069 				      SMB2_O_INFO_FILE,
1070 				      CIFSMaxBufSize -
1071 				      MAX_SMB2_CREATE_RESPONSE_SIZE -
1072 				      MAX_SMB2_CLOSE_RESPONSE_SIZE,
1073 				      &rsp_iov, &buftype, cifs_sb);
1074 	if (rc) {
1075 		/*
1076 		 * If ea_name is NULL (listxattr) and there are no EAs,
1077 		 * return 0 as it's not an error. Otherwise, the specified
1078 		 * ea_name was not found.
1079 		 */
1080 		if (!ea_name && rc == -ENODATA)
1081 			rc = 0;
1082 		goto qeas_exit;
1083 	}
1084 
1085 	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1086 	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1087 			       le32_to_cpu(rsp->OutputBufferLength),
1088 			       &rsp_iov,
1089 			       sizeof(struct smb2_file_full_ea_info));
1090 	if (rc)
1091 		goto qeas_exit;
1092 
1093 	info = (struct smb2_file_full_ea_info *)(
1094 			le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1095 	rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1096 			le32_to_cpu(rsp->OutputBufferLength), ea_name);
1097 
1098  qeas_exit:
1099 	free_rsp_buf(buftype, rsp_iov.iov_base);
1100 	return rc;
1101 }
1102 
1103 static int
smb2_set_ea(const unsigned int xid,struct cifs_tcon * tcon,const char * path,const char * ea_name,const void * ea_value,const __u16 ea_value_len,const struct nls_table * nls_codepage,struct cifs_sb_info * cifs_sb)1104 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1105 	    const char *path, const char *ea_name, const void *ea_value,
1106 	    const __u16 ea_value_len, const struct nls_table *nls_codepage,
1107 	    struct cifs_sb_info *cifs_sb)
1108 {
1109 	struct smb2_compound_vars *vars;
1110 	struct cifs_ses *ses = tcon->ses;
1111 	struct TCP_Server_Info *server = cifs_pick_channel(ses);
1112 	struct smb_rqst *rqst;
1113 	struct kvec *rsp_iov;
1114 	__le16 *utf16_path = NULL;
1115 	int ea_name_len = strlen(ea_name);
1116 	int flags = CIFS_CP_CREATE_CLOSE_OP;
1117 	int len;
1118 	int resp_buftype[3];
1119 	struct cifs_open_parms oparms;
1120 	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1121 	struct cifs_fid fid;
1122 	unsigned int size[1];
1123 	void *data[1];
1124 	struct smb2_file_full_ea_info *ea = NULL;
1125 	struct smb2_query_info_rsp *rsp;
1126 	int rc, used_len = 0;
1127 
1128 	if (smb3_encryption_required(tcon))
1129 		flags |= CIFS_TRANSFORM_REQ;
1130 
1131 	if (ea_name_len > 255)
1132 		return -EINVAL;
1133 
1134 	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1135 	if (!utf16_path)
1136 		return -ENOMEM;
1137 
1138 	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1139 	vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1140 	if (!vars) {
1141 		rc = -ENOMEM;
1142 		goto out_free_path;
1143 	}
1144 	rqst = vars->rqst;
1145 	rsp_iov = vars->rsp_iov;
1146 
1147 	if (ses->server->ops->query_all_EAs) {
1148 		if (!ea_value) {
1149 			rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1150 							     ea_name, NULL, 0,
1151 							     cifs_sb);
1152 			if (rc == -ENODATA)
1153 				goto sea_exit;
1154 		} else {
1155 			/* If we are adding a attribute we should first check
1156 			 * if there will be enough space available to store
1157 			 * the new EA. If not we should not add it since we
1158 			 * would not be able to even read the EAs back.
1159 			 */
1160 			rc = smb2_query_info_compound(xid, tcon, path,
1161 				      FILE_READ_EA,
1162 				      FILE_FULL_EA_INFORMATION,
1163 				      SMB2_O_INFO_FILE,
1164 				      CIFSMaxBufSize -
1165 				      MAX_SMB2_CREATE_RESPONSE_SIZE -
1166 				      MAX_SMB2_CLOSE_RESPONSE_SIZE,
1167 				      &rsp_iov[1], &resp_buftype[1], cifs_sb);
1168 			if (rc == 0) {
1169 				rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1170 				used_len = le32_to_cpu(rsp->OutputBufferLength);
1171 			}
1172 			free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1173 			resp_buftype[1] = CIFS_NO_BUFFER;
1174 			memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1175 			rc = 0;
1176 
1177 			/* Use a fudge factor of 256 bytes in case we collide
1178 			 * with a different set_EAs command.
1179 			 */
1180 			if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1181 			   MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1182 			   used_len + ea_name_len + ea_value_len + 1) {
1183 				rc = -ENOSPC;
1184 				goto sea_exit;
1185 			}
1186 		}
1187 	}
1188 
1189 	/* Open */
1190 	rqst[0].rq_iov = vars->open_iov;
1191 	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1192 
1193 	oparms = (struct cifs_open_parms) {
1194 		.tcon = tcon,
1195 		.path = path,
1196 		.desired_access = FILE_WRITE_EA,
1197 		.disposition = FILE_OPEN,
1198 		.create_options = cifs_create_options(cifs_sb, 0),
1199 		.fid = &fid,
1200 	};
1201 
1202 	rc = SMB2_open_init(tcon, server,
1203 			    &rqst[0], &oplock, &oparms, utf16_path);
1204 	if (rc)
1205 		goto sea_exit;
1206 	smb2_set_next_command(tcon, &rqst[0]);
1207 
1208 
1209 	/* Set Info */
1210 	rqst[1].rq_iov = vars->si_iov;
1211 	rqst[1].rq_nvec = 1;
1212 
1213 	len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1214 	ea = kzalloc(len, GFP_KERNEL);
1215 	if (ea == NULL) {
1216 		rc = -ENOMEM;
1217 		goto sea_exit;
1218 	}
1219 
1220 	ea->ea_name_length = ea_name_len;
1221 	ea->ea_value_length = cpu_to_le16(ea_value_len);
1222 	memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1223 	memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1224 
1225 	size[0] = len;
1226 	data[0] = ea;
1227 
1228 	rc = SMB2_set_info_init(tcon, server,
1229 				&rqst[1], COMPOUND_FID,
1230 				COMPOUND_FID, current->tgid,
1231 				FILE_FULL_EA_INFORMATION,
1232 				SMB2_O_INFO_FILE, 0, data, size);
1233 	if (rc)
1234 		goto sea_exit;
1235 	smb2_set_next_command(tcon, &rqst[1]);
1236 	smb2_set_related(&rqst[1]);
1237 
1238 	/* Close */
1239 	rqst[2].rq_iov = &vars->close_iov;
1240 	rqst[2].rq_nvec = 1;
1241 	rc = SMB2_close_init(tcon, server,
1242 			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1243 	if (rc)
1244 		goto sea_exit;
1245 	smb2_set_related(&rqst[2]);
1246 
1247 	rc = compound_send_recv(xid, ses, server,
1248 				flags, 3, rqst,
1249 				resp_buftype, rsp_iov);
1250 	/* no need to bump num_remote_opens because handle immediately closed */
1251 
1252  sea_exit:
1253 	kfree(ea);
1254 	SMB2_open_free(&rqst[0]);
1255 	SMB2_set_info_free(&rqst[1]);
1256 	SMB2_close_free(&rqst[2]);
1257 	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1258 	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1259 	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1260 	kfree(vars);
1261 out_free_path:
1262 	kfree(utf16_path);
1263 	return rc;
1264 }
1265 #endif
1266 
1267 static bool
smb2_can_echo(struct TCP_Server_Info * server)1268 smb2_can_echo(struct TCP_Server_Info *server)
1269 {
1270 	return server->echoes;
1271 }
1272 
1273 static void
smb2_clear_stats(struct cifs_tcon * tcon)1274 smb2_clear_stats(struct cifs_tcon *tcon)
1275 {
1276 	int i;
1277 
1278 	for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1279 		atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1280 		atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1281 	}
1282 }
1283 
1284 static void
smb2_dump_share_caps(struct seq_file * m,struct cifs_tcon * tcon)1285 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1286 {
1287 	seq_puts(m, "\n\tShare Capabilities:");
1288 	if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1289 		seq_puts(m, " DFS,");
1290 	if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1291 		seq_puts(m, " CONTINUOUS AVAILABILITY,");
1292 	if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1293 		seq_puts(m, " SCALEOUT,");
1294 	if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1295 		seq_puts(m, " CLUSTER,");
1296 	if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1297 		seq_puts(m, " ASYMMETRIC,");
1298 	if (tcon->capabilities == 0)
1299 		seq_puts(m, " None");
1300 	if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1301 		seq_puts(m, " Aligned,");
1302 	if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1303 		seq_puts(m, " Partition Aligned,");
1304 	if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1305 		seq_puts(m, " SSD,");
1306 	if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1307 		seq_puts(m, " TRIM-support,");
1308 
1309 	seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1310 	seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1311 	if (tcon->perf_sector_size)
1312 		seq_printf(m, "\tOptimal sector size: 0x%x",
1313 			   tcon->perf_sector_size);
1314 	seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1315 }
1316 
1317 static void
smb2_print_stats(struct seq_file * m,struct cifs_tcon * tcon)1318 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1319 {
1320 	atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1321 	atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1322 
1323 	/*
1324 	 *  Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1325 	 *  totals (requests sent) since those SMBs are per-session not per tcon
1326 	 */
1327 	seq_printf(m, "\nBytes read: %llu  Bytes written: %llu",
1328 		   (long long)(tcon->bytes_read),
1329 		   (long long)(tcon->bytes_written));
1330 	seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1331 		   atomic_read(&tcon->num_local_opens),
1332 		   atomic_read(&tcon->num_remote_opens));
1333 	seq_printf(m, "\nTreeConnects: %d total %d failed",
1334 		   atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1335 		   atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1336 	seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1337 		   atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1338 		   atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1339 	seq_printf(m, "\nCreates: %d total %d failed",
1340 		   atomic_read(&sent[SMB2_CREATE_HE]),
1341 		   atomic_read(&failed[SMB2_CREATE_HE]));
1342 	seq_printf(m, "\nCloses: %d total %d failed",
1343 		   atomic_read(&sent[SMB2_CLOSE_HE]),
1344 		   atomic_read(&failed[SMB2_CLOSE_HE]));
1345 	seq_printf(m, "\nFlushes: %d total %d failed",
1346 		   atomic_read(&sent[SMB2_FLUSH_HE]),
1347 		   atomic_read(&failed[SMB2_FLUSH_HE]));
1348 	seq_printf(m, "\nReads: %d total %d failed",
1349 		   atomic_read(&sent[SMB2_READ_HE]),
1350 		   atomic_read(&failed[SMB2_READ_HE]));
1351 	seq_printf(m, "\nWrites: %d total %d failed",
1352 		   atomic_read(&sent[SMB2_WRITE_HE]),
1353 		   atomic_read(&failed[SMB2_WRITE_HE]));
1354 	seq_printf(m, "\nLocks: %d total %d failed",
1355 		   atomic_read(&sent[SMB2_LOCK_HE]),
1356 		   atomic_read(&failed[SMB2_LOCK_HE]));
1357 	seq_printf(m, "\nIOCTLs: %d total %d failed",
1358 		   atomic_read(&sent[SMB2_IOCTL_HE]),
1359 		   atomic_read(&failed[SMB2_IOCTL_HE]));
1360 	seq_printf(m, "\nQueryDirectories: %d total %d failed",
1361 		   atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1362 		   atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1363 	seq_printf(m, "\nChangeNotifies: %d total %d failed",
1364 		   atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1365 		   atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1366 	seq_printf(m, "\nQueryInfos: %d total %d failed",
1367 		   atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1368 		   atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1369 	seq_printf(m, "\nSetInfos: %d total %d failed",
1370 		   atomic_read(&sent[SMB2_SET_INFO_HE]),
1371 		   atomic_read(&failed[SMB2_SET_INFO_HE]));
1372 	seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1373 		   atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1374 		   atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1375 }
1376 
1377 static void
smb2_set_fid(struct cifsFileInfo * cfile,struct cifs_fid * fid,__u32 oplock)1378 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1379 {
1380 	struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1381 	struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1382 
1383 	cfile->fid.persistent_fid = fid->persistent_fid;
1384 	cfile->fid.volatile_fid = fid->volatile_fid;
1385 	cfile->fid.access = fid->access;
1386 #ifdef CONFIG_CIFS_DEBUG2
1387 	cfile->fid.mid = fid->mid;
1388 #endif /* CIFS_DEBUG2 */
1389 	server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1390 				      &fid->purge_cache);
1391 	cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1392 	memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1393 }
1394 
1395 static void
smb2_close_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1396 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1397 		struct cifs_fid *fid)
1398 {
1399 	SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1400 }
1401 
1402 static void
smb2_close_getattr(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)1403 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1404 		   struct cifsFileInfo *cfile)
1405 {
1406 	struct smb2_file_network_open_info file_inf;
1407 	struct inode *inode;
1408 	int rc;
1409 
1410 	rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1411 		   cfile->fid.volatile_fid, &file_inf);
1412 	if (rc)
1413 		return;
1414 
1415 	inode = d_inode(cfile->dentry);
1416 
1417 	spin_lock(&inode->i_lock);
1418 	CIFS_I(inode)->time = jiffies;
1419 
1420 	/* Creation time should not need to be updated on close */
1421 	if (file_inf.LastWriteTime)
1422 		inode_set_mtime_to_ts(inode,
1423 				      cifs_NTtimeToUnix(file_inf.LastWriteTime));
1424 	if (file_inf.ChangeTime)
1425 		inode_set_ctime_to_ts(inode,
1426 				      cifs_NTtimeToUnix(file_inf.ChangeTime));
1427 	if (file_inf.LastAccessTime)
1428 		inode_set_atime_to_ts(inode,
1429 				      cifs_NTtimeToUnix(file_inf.LastAccessTime));
1430 
1431 	/*
1432 	 * i_blocks is not related to (i_size / i_blksize),
1433 	 * but instead 512 byte (2**9) size is required for
1434 	 * calculating num blocks.
1435 	 */
1436 	if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1437 		inode->i_blocks =
1438 			(512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1439 
1440 	/* End of file and Attributes should not have to be updated on close */
1441 	spin_unlock(&inode->i_lock);
1442 }
1443 
1444 static int
SMB2_request_res_key(const unsigned int xid,struct cifs_tcon * tcon,u64 persistent_fid,u64 volatile_fid,struct copychunk_ioctl * pcchunk)1445 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1446 		     u64 persistent_fid, u64 volatile_fid,
1447 		     struct copychunk_ioctl *pcchunk)
1448 {
1449 	int rc;
1450 	unsigned int ret_data_len;
1451 	struct resume_key_req *res_key;
1452 
1453 	rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1454 			FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1455 			CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1456 
1457 	if (rc == -EOPNOTSUPP) {
1458 		pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1459 		goto req_res_key_exit;
1460 	} else if (rc) {
1461 		cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1462 		goto req_res_key_exit;
1463 	}
1464 	if (ret_data_len < sizeof(struct resume_key_req)) {
1465 		cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1466 		rc = -EINVAL;
1467 		goto req_res_key_exit;
1468 	}
1469 	memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1470 
1471 req_res_key_exit:
1472 	kfree(res_key);
1473 	return rc;
1474 }
1475 
1476 static int
smb2_ioctl_query_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,__le16 * path,int is_dir,unsigned long p)1477 smb2_ioctl_query_info(const unsigned int xid,
1478 		      struct cifs_tcon *tcon,
1479 		      struct cifs_sb_info *cifs_sb,
1480 		      __le16 *path, int is_dir,
1481 		      unsigned long p)
1482 {
1483 	struct smb2_compound_vars *vars;
1484 	struct smb_rqst *rqst;
1485 	struct kvec *rsp_iov;
1486 	struct cifs_ses *ses = tcon->ses;
1487 	struct TCP_Server_Info *server = cifs_pick_channel(ses);
1488 	char __user *arg = (char __user *)p;
1489 	struct smb_query_info qi;
1490 	struct smb_query_info __user *pqi;
1491 	int rc = 0;
1492 	int flags = CIFS_CP_CREATE_CLOSE_OP;
1493 	struct smb2_query_info_rsp *qi_rsp = NULL;
1494 	struct smb2_ioctl_rsp *io_rsp = NULL;
1495 	void *buffer = NULL;
1496 	int resp_buftype[3];
1497 	struct cifs_open_parms oparms;
1498 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1499 	struct cifs_fid fid;
1500 	unsigned int size[2];
1501 	void *data[2];
1502 	int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1503 	void (*free_req1_func)(struct smb_rqst *r);
1504 
1505 	vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1506 	if (vars == NULL)
1507 		return -ENOMEM;
1508 	rqst = &vars->rqst[0];
1509 	rsp_iov = &vars->rsp_iov[0];
1510 
1511 	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1512 
1513 	if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1514 		rc = -EFAULT;
1515 		goto free_vars;
1516 	}
1517 	if (qi.output_buffer_length > 1024) {
1518 		rc = -EINVAL;
1519 		goto free_vars;
1520 	}
1521 
1522 	if (!ses || !server) {
1523 		rc = -EIO;
1524 		goto free_vars;
1525 	}
1526 
1527 	if (smb3_encryption_required(tcon))
1528 		flags |= CIFS_TRANSFORM_REQ;
1529 
1530 	if (qi.output_buffer_length) {
1531 		buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1532 		if (IS_ERR(buffer)) {
1533 			rc = PTR_ERR(buffer);
1534 			goto free_vars;
1535 		}
1536 	}
1537 
1538 	/* Open */
1539 	rqst[0].rq_iov = &vars->open_iov[0];
1540 	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1541 
1542 	oparms = (struct cifs_open_parms) {
1543 		.tcon = tcon,
1544 		.disposition = FILE_OPEN,
1545 		.create_options = cifs_create_options(cifs_sb, create_options),
1546 		.fid = &fid,
1547 	};
1548 
1549 	if (qi.flags & PASSTHRU_FSCTL) {
1550 		switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1551 		case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1552 			oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1553 			break;
1554 		case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1555 			oparms.desired_access = GENERIC_ALL;
1556 			break;
1557 		case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1558 			oparms.desired_access = GENERIC_READ;
1559 			break;
1560 		case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1561 			oparms.desired_access = GENERIC_WRITE;
1562 			break;
1563 		}
1564 	} else if (qi.flags & PASSTHRU_SET_INFO) {
1565 		oparms.desired_access = GENERIC_WRITE;
1566 	} else {
1567 		oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1568 	}
1569 
1570 	rc = SMB2_open_init(tcon, server,
1571 			    &rqst[0], &oplock, &oparms, path);
1572 	if (rc)
1573 		goto free_output_buffer;
1574 	smb2_set_next_command(tcon, &rqst[0]);
1575 
1576 	/* Query */
1577 	if (qi.flags & PASSTHRU_FSCTL) {
1578 		/* Can eventually relax perm check since server enforces too */
1579 		if (!capable(CAP_SYS_ADMIN)) {
1580 			rc = -EPERM;
1581 			goto free_open_req;
1582 		}
1583 		rqst[1].rq_iov = &vars->io_iov[0];
1584 		rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1585 
1586 		rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1587 				     qi.info_type, buffer, qi.output_buffer_length,
1588 				     CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1589 				     MAX_SMB2_CLOSE_RESPONSE_SIZE);
1590 		free_req1_func = SMB2_ioctl_free;
1591 	} else if (qi.flags == PASSTHRU_SET_INFO) {
1592 		/* Can eventually relax perm check since server enforces too */
1593 		if (!capable(CAP_SYS_ADMIN)) {
1594 			rc = -EPERM;
1595 			goto free_open_req;
1596 		}
1597 		if (qi.output_buffer_length < 8) {
1598 			rc = -EINVAL;
1599 			goto free_open_req;
1600 		}
1601 		rqst[1].rq_iov = vars->si_iov;
1602 		rqst[1].rq_nvec = 1;
1603 
1604 		/* MS-FSCC 2.4.13 FileEndOfFileInformation */
1605 		size[0] = 8;
1606 		data[0] = buffer;
1607 
1608 		rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1609 					current->tgid, FILE_END_OF_FILE_INFORMATION,
1610 					SMB2_O_INFO_FILE, 0, data, size);
1611 		free_req1_func = SMB2_set_info_free;
1612 	} else if (qi.flags == PASSTHRU_QUERY_INFO) {
1613 		rqst[1].rq_iov = &vars->qi_iov;
1614 		rqst[1].rq_nvec = 1;
1615 
1616 		rc = SMB2_query_info_init(tcon, server,
1617 				  &rqst[1], COMPOUND_FID,
1618 				  COMPOUND_FID, qi.file_info_class,
1619 				  qi.info_type, qi.additional_information,
1620 				  qi.input_buffer_length,
1621 				  qi.output_buffer_length, buffer);
1622 		free_req1_func = SMB2_query_info_free;
1623 	} else { /* unknown flags */
1624 		cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1625 			      qi.flags);
1626 		rc = -EINVAL;
1627 	}
1628 
1629 	if (rc)
1630 		goto free_open_req;
1631 	smb2_set_next_command(tcon, &rqst[1]);
1632 	smb2_set_related(&rqst[1]);
1633 
1634 	/* Close */
1635 	rqst[2].rq_iov = &vars->close_iov;
1636 	rqst[2].rq_nvec = 1;
1637 
1638 	rc = SMB2_close_init(tcon, server,
1639 			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1640 	if (rc)
1641 		goto free_req_1;
1642 	smb2_set_related(&rqst[2]);
1643 
1644 	rc = compound_send_recv(xid, ses, server,
1645 				flags, 3, rqst,
1646 				resp_buftype, rsp_iov);
1647 	if (rc)
1648 		goto out;
1649 
1650 	/* No need to bump num_remote_opens since handle immediately closed */
1651 	if (qi.flags & PASSTHRU_FSCTL) {
1652 		pqi = (struct smb_query_info __user *)arg;
1653 		io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1654 		if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1655 			qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1656 		if (qi.input_buffer_length > 0 &&
1657 		    le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1658 		    > rsp_iov[1].iov_len) {
1659 			rc = -EFAULT;
1660 			goto out;
1661 		}
1662 
1663 		if (copy_to_user(&pqi->input_buffer_length,
1664 				 &qi.input_buffer_length,
1665 				 sizeof(qi.input_buffer_length))) {
1666 			rc = -EFAULT;
1667 			goto out;
1668 		}
1669 
1670 		if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1671 				 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1672 				 qi.input_buffer_length))
1673 			rc = -EFAULT;
1674 	} else {
1675 		pqi = (struct smb_query_info __user *)arg;
1676 		qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1677 		if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1678 			qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1679 		if (copy_to_user(&pqi->input_buffer_length,
1680 				 &qi.input_buffer_length,
1681 				 sizeof(qi.input_buffer_length))) {
1682 			rc = -EFAULT;
1683 			goto out;
1684 		}
1685 
1686 		if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1687 				 qi.input_buffer_length))
1688 			rc = -EFAULT;
1689 	}
1690 
1691 out:
1692 	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1693 	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1694 	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1695 	SMB2_close_free(&rqst[2]);
1696 free_req_1:
1697 	free_req1_func(&rqst[1]);
1698 free_open_req:
1699 	SMB2_open_free(&rqst[0]);
1700 free_output_buffer:
1701 	kfree(buffer);
1702 free_vars:
1703 	kfree(vars);
1704 	return rc;
1705 }
1706 
1707 static ssize_t
smb2_copychunk_range(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1708 smb2_copychunk_range(const unsigned int xid,
1709 			struct cifsFileInfo *srcfile,
1710 			struct cifsFileInfo *trgtfile, u64 src_off,
1711 			u64 len, u64 dest_off)
1712 {
1713 	int rc;
1714 	unsigned int ret_data_len;
1715 	struct copychunk_ioctl *pcchunk;
1716 	struct copychunk_ioctl_rsp *retbuf = NULL;
1717 	struct cifs_tcon *tcon;
1718 	int chunks_copied = 0;
1719 	bool chunk_sizes_updated = false;
1720 	ssize_t bytes_written, total_bytes_written = 0;
1721 
1722 	pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1723 	if (pcchunk == NULL)
1724 		return -ENOMEM;
1725 
1726 	cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1727 	/* Request a key from the server to identify the source of the copy */
1728 	rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1729 				srcfile->fid.persistent_fid,
1730 				srcfile->fid.volatile_fid, pcchunk);
1731 
1732 	/* Note: request_res_key sets res_key null only if rc !=0 */
1733 	if (rc)
1734 		goto cchunk_out;
1735 
1736 	/* For now array only one chunk long, will make more flexible later */
1737 	pcchunk->ChunkCount = cpu_to_le32(1);
1738 	pcchunk->Reserved = 0;
1739 	pcchunk->Reserved2 = 0;
1740 
1741 	tcon = tlink_tcon(trgtfile->tlink);
1742 
1743 	while (len > 0) {
1744 		pcchunk->SourceOffset = cpu_to_le64(src_off);
1745 		pcchunk->TargetOffset = cpu_to_le64(dest_off);
1746 		pcchunk->Length =
1747 			cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1748 
1749 		/* Request server copy to target from src identified by key */
1750 		kfree(retbuf);
1751 		retbuf = NULL;
1752 		rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1753 			trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1754 			(char *)pcchunk, sizeof(struct copychunk_ioctl),
1755 			CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1756 		if (rc == 0) {
1757 			if (ret_data_len !=
1758 					sizeof(struct copychunk_ioctl_rsp)) {
1759 				cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1760 				rc = -EIO;
1761 				goto cchunk_out;
1762 			}
1763 			if (retbuf->TotalBytesWritten == 0) {
1764 				cifs_dbg(FYI, "no bytes copied\n");
1765 				rc = -EIO;
1766 				goto cchunk_out;
1767 			}
1768 			/*
1769 			 * Check if server claimed to write more than we asked
1770 			 */
1771 			if (le32_to_cpu(retbuf->TotalBytesWritten) >
1772 			    le32_to_cpu(pcchunk->Length)) {
1773 				cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1774 				rc = -EIO;
1775 				goto cchunk_out;
1776 			}
1777 			if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1778 				cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1779 				rc = -EIO;
1780 				goto cchunk_out;
1781 			}
1782 			chunks_copied++;
1783 
1784 			bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1785 			src_off += bytes_written;
1786 			dest_off += bytes_written;
1787 			len -= bytes_written;
1788 			total_bytes_written += bytes_written;
1789 
1790 			cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1791 				le32_to_cpu(retbuf->ChunksWritten),
1792 				le32_to_cpu(retbuf->ChunkBytesWritten),
1793 				bytes_written);
1794 		} else if (rc == -EINVAL) {
1795 			if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1796 				goto cchunk_out;
1797 
1798 			cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1799 				le32_to_cpu(retbuf->ChunksWritten),
1800 				le32_to_cpu(retbuf->ChunkBytesWritten),
1801 				le32_to_cpu(retbuf->TotalBytesWritten));
1802 
1803 			/*
1804 			 * Check if this is the first request using these sizes,
1805 			 * (ie check if copy succeed once with original sizes
1806 			 * and check if the server gave us different sizes after
1807 			 * we already updated max sizes on previous request).
1808 			 * if not then why is the server returning an error now
1809 			 */
1810 			if ((chunks_copied != 0) || chunk_sizes_updated)
1811 				goto cchunk_out;
1812 
1813 			/* Check that server is not asking us to grow size */
1814 			if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1815 					tcon->max_bytes_chunk)
1816 				tcon->max_bytes_chunk =
1817 					le32_to_cpu(retbuf->ChunkBytesWritten);
1818 			else
1819 				goto cchunk_out; /* server gave us bogus size */
1820 
1821 			/* No need to change MaxChunks since already set to 1 */
1822 			chunk_sizes_updated = true;
1823 		} else
1824 			goto cchunk_out;
1825 	}
1826 
1827 cchunk_out:
1828 	kfree(pcchunk);
1829 	kfree(retbuf);
1830 	if (rc)
1831 		return rc;
1832 	else
1833 		return total_bytes_written;
1834 }
1835 
1836 static int
smb2_flush_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1837 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1838 		struct cifs_fid *fid)
1839 {
1840 	return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1841 }
1842 
1843 static unsigned int
smb2_read_data_offset(char * buf)1844 smb2_read_data_offset(char *buf)
1845 {
1846 	struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1847 
1848 	return rsp->DataOffset;
1849 }
1850 
1851 static unsigned int
smb2_read_data_length(char * buf,bool in_remaining)1852 smb2_read_data_length(char *buf, bool in_remaining)
1853 {
1854 	struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1855 
1856 	if (in_remaining)
1857 		return le32_to_cpu(rsp->DataRemaining);
1858 
1859 	return le32_to_cpu(rsp->DataLength);
1860 }
1861 
1862 
1863 static int
smb2_sync_read(const unsigned int xid,struct cifs_fid * pfid,struct cifs_io_parms * parms,unsigned int * bytes_read,char ** buf,int * buf_type)1864 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1865 	       struct cifs_io_parms *parms, unsigned int *bytes_read,
1866 	       char **buf, int *buf_type)
1867 {
1868 	parms->persistent_fid = pfid->persistent_fid;
1869 	parms->volatile_fid = pfid->volatile_fid;
1870 	return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1871 }
1872 
1873 static int
smb2_sync_write(const unsigned int xid,struct cifs_fid * pfid,struct cifs_io_parms * parms,unsigned int * written,struct kvec * iov,unsigned long nr_segs)1874 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1875 		struct cifs_io_parms *parms, unsigned int *written,
1876 		struct kvec *iov, unsigned long nr_segs)
1877 {
1878 
1879 	parms->persistent_fid = pfid->persistent_fid;
1880 	parms->volatile_fid = pfid->volatile_fid;
1881 	return SMB2_write(xid, parms, written, iov, nr_segs);
1882 }
1883 
1884 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
smb2_set_sparse(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct inode * inode,__u8 setsparse)1885 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1886 		struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1887 {
1888 	struct cifsInodeInfo *cifsi;
1889 	int rc;
1890 
1891 	cifsi = CIFS_I(inode);
1892 
1893 	/* if file already sparse don't bother setting sparse again */
1894 	if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1895 		return true; /* already sparse */
1896 
1897 	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1898 		return true; /* already not sparse */
1899 
1900 	/*
1901 	 * Can't check for sparse support on share the usual way via the
1902 	 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1903 	 * since Samba server doesn't set the flag on the share, yet
1904 	 * supports the set sparse FSCTL and returns sparse correctly
1905 	 * in the file attributes. If we fail setting sparse though we
1906 	 * mark that server does not support sparse files for this share
1907 	 * to avoid repeatedly sending the unsupported fsctl to server
1908 	 * if the file is repeatedly extended.
1909 	 */
1910 	if (tcon->broken_sparse_sup)
1911 		return false;
1912 
1913 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1914 			cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1915 			&setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1916 	if (rc) {
1917 		tcon->broken_sparse_sup = true;
1918 		cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1919 		return false;
1920 	}
1921 
1922 	if (setsparse)
1923 		cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1924 	else
1925 		cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1926 
1927 	return true;
1928 }
1929 
1930 static int
smb2_set_file_size(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,__u64 size,bool set_alloc)1931 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1932 		   struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1933 {
1934 	__le64 eof = cpu_to_le64(size);
1935 	struct inode *inode;
1936 
1937 	/*
1938 	 * If extending file more than one page make sparse. Many Linux fs
1939 	 * make files sparse by default when extending via ftruncate
1940 	 */
1941 	inode = d_inode(cfile->dentry);
1942 
1943 	if (!set_alloc && (size > inode->i_size + 8192)) {
1944 		__u8 set_sparse = 1;
1945 
1946 		/* whether set sparse succeeds or not, extend the file */
1947 		smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1948 	}
1949 
1950 	return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1951 			    cfile->fid.volatile_fid, cfile->pid, &eof);
1952 }
1953 
1954 static int
smb2_duplicate_extents(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1955 smb2_duplicate_extents(const unsigned int xid,
1956 			struct cifsFileInfo *srcfile,
1957 			struct cifsFileInfo *trgtfile, u64 src_off,
1958 			u64 len, u64 dest_off)
1959 {
1960 	int rc;
1961 	unsigned int ret_data_len;
1962 	struct inode *inode;
1963 	struct duplicate_extents_to_file dup_ext_buf;
1964 	struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1965 
1966 	/* server fileays advertise duplicate extent support with this flag */
1967 	if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1968 	     FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1969 		return -EOPNOTSUPP;
1970 
1971 	dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1972 	dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1973 	dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1974 	dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1975 	dup_ext_buf.ByteCount = cpu_to_le64(len);
1976 	cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1977 		src_off, dest_off, len);
1978 
1979 	inode = d_inode(trgtfile->dentry);
1980 	if (inode->i_size < dest_off + len) {
1981 		rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1982 		if (rc)
1983 			goto duplicate_extents_out;
1984 
1985 		/*
1986 		 * Although also could set plausible allocation size (i_blocks)
1987 		 * here in addition to setting the file size, in reflink
1988 		 * it is likely that the target file is sparse. Its allocation
1989 		 * size will be queried on next revalidate, but it is important
1990 		 * to make sure that file's cached size is updated immediately
1991 		 */
1992 		cifs_setsize(inode, dest_off + len);
1993 	}
1994 	rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1995 			trgtfile->fid.volatile_fid,
1996 			FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1997 			(char *)&dup_ext_buf,
1998 			sizeof(struct duplicate_extents_to_file),
1999 			CIFSMaxBufSize, NULL,
2000 			&ret_data_len);
2001 
2002 	if (ret_data_len > 0)
2003 		cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2004 
2005 duplicate_extents_out:
2006 	return rc;
2007 }
2008 
2009 static int
smb2_set_compression(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2010 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2011 		   struct cifsFileInfo *cfile)
2012 {
2013 	return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2014 			    cfile->fid.volatile_fid);
2015 }
2016 
2017 static int
smb3_set_integrity(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2018 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2019 		   struct cifsFileInfo *cfile)
2020 {
2021 	struct fsctl_set_integrity_information_req integr_info;
2022 	unsigned int ret_data_len;
2023 
2024 	integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2025 	integr_info.Flags = 0;
2026 	integr_info.Reserved = 0;
2027 
2028 	return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2029 			cfile->fid.volatile_fid,
2030 			FSCTL_SET_INTEGRITY_INFORMATION,
2031 			(char *)&integr_info,
2032 			sizeof(struct fsctl_set_integrity_information_req),
2033 			CIFSMaxBufSize, NULL,
2034 			&ret_data_len);
2035 
2036 }
2037 
2038 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2039 #define GMT_TOKEN_SIZE 50
2040 
2041 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2042 
2043 /*
2044  * Input buffer contains (empty) struct smb_snapshot array with size filled in
2045  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2046  */
2047 static int
smb3_enum_snapshots(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,void __user * ioc_buf)2048 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2049 		   struct cifsFileInfo *cfile, void __user *ioc_buf)
2050 {
2051 	char *retbuf = NULL;
2052 	unsigned int ret_data_len = 0;
2053 	int rc;
2054 	u32 max_response_size;
2055 	struct smb_snapshot_array snapshot_in;
2056 
2057 	/*
2058 	 * On the first query to enumerate the list of snapshots available
2059 	 * for this volume the buffer begins with 0 (number of snapshots
2060 	 * which can be returned is zero since at that point we do not know
2061 	 * how big the buffer needs to be). On the second query,
2062 	 * it (ret_data_len) is set to number of snapshots so we can
2063 	 * know to set the maximum response size larger (see below).
2064 	 */
2065 	if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2066 		return -EFAULT;
2067 
2068 	/*
2069 	 * Note that for snapshot queries that servers like Azure expect that
2070 	 * the first query be minimal size (and just used to get the number/size
2071 	 * of previous versions) so response size must be specified as EXACTLY
2072 	 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2073 	 * of eight bytes.
2074 	 */
2075 	if (ret_data_len == 0)
2076 		max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2077 	else
2078 		max_response_size = CIFSMaxBufSize;
2079 
2080 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2081 			cfile->fid.volatile_fid,
2082 			FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2083 			NULL, 0 /* no input data */, max_response_size,
2084 			(char **)&retbuf,
2085 			&ret_data_len);
2086 	cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2087 			rc, ret_data_len);
2088 	if (rc)
2089 		return rc;
2090 
2091 	if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2092 		/* Fixup buffer */
2093 		if (copy_from_user(&snapshot_in, ioc_buf,
2094 		    sizeof(struct smb_snapshot_array))) {
2095 			rc = -EFAULT;
2096 			kfree(retbuf);
2097 			return rc;
2098 		}
2099 
2100 		/*
2101 		 * Check for min size, ie not large enough to fit even one GMT
2102 		 * token (snapshot).  On the first ioctl some users may pass in
2103 		 * smaller size (or zero) to simply get the size of the array
2104 		 * so the user space caller can allocate sufficient memory
2105 		 * and retry the ioctl again with larger array size sufficient
2106 		 * to hold all of the snapshot GMT tokens on the second try.
2107 		 */
2108 		if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2109 			ret_data_len = sizeof(struct smb_snapshot_array);
2110 
2111 		/*
2112 		 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2113 		 * the snapshot array (of 50 byte GMT tokens) each
2114 		 * representing an available previous version of the data
2115 		 */
2116 		if (ret_data_len > (snapshot_in.snapshot_array_size +
2117 					sizeof(struct smb_snapshot_array)))
2118 			ret_data_len = snapshot_in.snapshot_array_size +
2119 					sizeof(struct smb_snapshot_array);
2120 
2121 		if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2122 			rc = -EFAULT;
2123 	}
2124 
2125 	kfree(retbuf);
2126 	return rc;
2127 }
2128 
2129 
2130 
2131 static int
smb3_notify(const unsigned int xid,struct file * pfile,void __user * ioc_buf,bool return_changes)2132 smb3_notify(const unsigned int xid, struct file *pfile,
2133 	    void __user *ioc_buf, bool return_changes)
2134 {
2135 	struct smb3_notify_info notify;
2136 	struct smb3_notify_info __user *pnotify_buf;
2137 	struct dentry *dentry = pfile->f_path.dentry;
2138 	struct inode *inode = file_inode(pfile);
2139 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2140 	struct cifs_open_parms oparms;
2141 	struct cifs_fid fid;
2142 	struct cifs_tcon *tcon;
2143 	const unsigned char *path;
2144 	char *returned_ioctl_info = NULL;
2145 	void *page = alloc_dentry_path();
2146 	__le16 *utf16_path = NULL;
2147 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2148 	int rc = 0;
2149 	__u32 ret_len = 0;
2150 
2151 	path = build_path_from_dentry(dentry, page);
2152 	if (IS_ERR(path)) {
2153 		rc = PTR_ERR(path);
2154 		goto notify_exit;
2155 	}
2156 
2157 	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2158 	if (utf16_path == NULL) {
2159 		rc = -ENOMEM;
2160 		goto notify_exit;
2161 	}
2162 
2163 	if (return_changes) {
2164 		if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify_info))) {
2165 			rc = -EFAULT;
2166 			goto notify_exit;
2167 		}
2168 	} else {
2169 		if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2170 			rc = -EFAULT;
2171 			goto notify_exit;
2172 		}
2173 		notify.data_len = 0;
2174 	}
2175 
2176 	tcon = cifs_sb_master_tcon(cifs_sb);
2177 	oparms = (struct cifs_open_parms) {
2178 		.tcon = tcon,
2179 		.path = path,
2180 		.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2181 		.disposition = FILE_OPEN,
2182 		.create_options = cifs_create_options(cifs_sb, 0),
2183 		.fid = &fid,
2184 	};
2185 
2186 	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2187 		       NULL);
2188 	if (rc)
2189 		goto notify_exit;
2190 
2191 	rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2192 				notify.watch_tree, notify.completion_filter,
2193 				notify.data_len, &returned_ioctl_info, &ret_len);
2194 
2195 	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2196 
2197 	cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2198 	if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2199 		if (ret_len > notify.data_len)
2200 			ret_len = notify.data_len;
2201 		pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2202 		if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2203 			rc = -EFAULT;
2204 		else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2205 			rc = -EFAULT;
2206 	}
2207 	kfree(returned_ioctl_info);
2208 notify_exit:
2209 	free_dentry_path(page);
2210 	kfree(utf16_path);
2211 	return rc;
2212 }
2213 
2214 static int
smb2_query_dir_first(const unsigned int xid,struct cifs_tcon * tcon,const char * path,struct cifs_sb_info * cifs_sb,struct cifs_fid * fid,__u16 search_flags,struct cifs_search_info * srch_inf)2215 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2216 		     const char *path, struct cifs_sb_info *cifs_sb,
2217 		     struct cifs_fid *fid, __u16 search_flags,
2218 		     struct cifs_search_info *srch_inf)
2219 {
2220 	__le16 *utf16_path;
2221 	struct smb_rqst rqst[2];
2222 	struct kvec rsp_iov[2];
2223 	int resp_buftype[2];
2224 	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2225 	struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2226 	int rc, flags = 0;
2227 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2228 	struct cifs_open_parms oparms;
2229 	struct smb2_query_directory_rsp *qd_rsp = NULL;
2230 	struct smb2_create_rsp *op_rsp = NULL;
2231 	struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2232 	int retry_count = 0;
2233 
2234 	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2235 	if (!utf16_path)
2236 		return -ENOMEM;
2237 
2238 	if (smb3_encryption_required(tcon))
2239 		flags |= CIFS_TRANSFORM_REQ;
2240 
2241 	memset(rqst, 0, sizeof(rqst));
2242 	resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2243 	memset(rsp_iov, 0, sizeof(rsp_iov));
2244 
2245 	/* Open */
2246 	memset(&open_iov, 0, sizeof(open_iov));
2247 	rqst[0].rq_iov = open_iov;
2248 	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2249 
2250 	oparms = (struct cifs_open_parms) {
2251 		.tcon = tcon,
2252 		.path = path,
2253 		.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2254 		.disposition = FILE_OPEN,
2255 		.create_options = cifs_create_options(cifs_sb, 0),
2256 		.fid = fid,
2257 	};
2258 
2259 	rc = SMB2_open_init(tcon, server,
2260 			    &rqst[0], &oplock, &oparms, utf16_path);
2261 	if (rc)
2262 		goto qdf_free;
2263 	smb2_set_next_command(tcon, &rqst[0]);
2264 
2265 	/* Query directory */
2266 	srch_inf->entries_in_buffer = 0;
2267 	srch_inf->index_of_last_entry = 2;
2268 
2269 	memset(&qd_iov, 0, sizeof(qd_iov));
2270 	rqst[1].rq_iov = qd_iov;
2271 	rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2272 
2273 	rc = SMB2_query_directory_init(xid, tcon, server,
2274 				       &rqst[1],
2275 				       COMPOUND_FID, COMPOUND_FID,
2276 				       0, srch_inf->info_level);
2277 	if (rc)
2278 		goto qdf_free;
2279 
2280 	smb2_set_related(&rqst[1]);
2281 
2282 again:
2283 	rc = compound_send_recv(xid, tcon->ses, server,
2284 				flags, 2, rqst,
2285 				resp_buftype, rsp_iov);
2286 
2287 	if (rc == -EAGAIN && retry_count++ < 10)
2288 		goto again;
2289 
2290 	/* If the open failed there is nothing to do */
2291 	op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2292 	if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2293 		cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2294 		goto qdf_free;
2295 	}
2296 	fid->persistent_fid = op_rsp->PersistentFileId;
2297 	fid->volatile_fid = op_rsp->VolatileFileId;
2298 
2299 	/* Anything else than ENODATA means a genuine error */
2300 	if (rc && rc != -ENODATA) {
2301 		SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2302 		cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2303 		trace_smb3_query_dir_err(xid, fid->persistent_fid,
2304 					 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2305 		goto qdf_free;
2306 	}
2307 
2308 	atomic_inc(&tcon->num_remote_opens);
2309 
2310 	qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2311 	if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2312 		trace_smb3_query_dir_done(xid, fid->persistent_fid,
2313 					  tcon->tid, tcon->ses->Suid, 0, 0);
2314 		srch_inf->endOfSearch = true;
2315 		rc = 0;
2316 		goto qdf_free;
2317 	}
2318 
2319 	rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2320 					srch_inf);
2321 	if (rc) {
2322 		trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2323 			tcon->ses->Suid, 0, 0, rc);
2324 		goto qdf_free;
2325 	}
2326 	resp_buftype[1] = CIFS_NO_BUFFER;
2327 
2328 	trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2329 			tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2330 
2331  qdf_free:
2332 	kfree(utf16_path);
2333 	SMB2_open_free(&rqst[0]);
2334 	SMB2_query_directory_free(&rqst[1]);
2335 	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2336 	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2337 	return rc;
2338 }
2339 
2340 static int
smb2_query_dir_next(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid,__u16 search_flags,struct cifs_search_info * srch_inf)2341 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2342 		    struct cifs_fid *fid, __u16 search_flags,
2343 		    struct cifs_search_info *srch_inf)
2344 {
2345 	return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2346 				    fid->volatile_fid, 0, srch_inf);
2347 }
2348 
2349 static int
smb2_close_dir(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)2350 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2351 	       struct cifs_fid *fid)
2352 {
2353 	return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2354 }
2355 
2356 /*
2357  * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2358  * the number of credits and return true. Otherwise - return false.
2359  */
2360 static bool
smb2_is_status_pending(char * buf,struct TCP_Server_Info * server)2361 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2362 {
2363 	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2364 	int scredits, in_flight;
2365 
2366 	if (shdr->Status != STATUS_PENDING)
2367 		return false;
2368 
2369 	if (shdr->CreditRequest) {
2370 		spin_lock(&server->req_lock);
2371 		server->credits += le16_to_cpu(shdr->CreditRequest);
2372 		scredits = server->credits;
2373 		in_flight = server->in_flight;
2374 		spin_unlock(&server->req_lock);
2375 		wake_up(&server->request_q);
2376 
2377 		trace_smb3_pend_credits(server->CurrentMid,
2378 				server->conn_id, server->hostname, scredits,
2379 				le16_to_cpu(shdr->CreditRequest), in_flight);
2380 		cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2381 				__func__, le16_to_cpu(shdr->CreditRequest), scredits);
2382 	}
2383 
2384 	return true;
2385 }
2386 
2387 static bool
smb2_is_session_expired(char * buf)2388 smb2_is_session_expired(char *buf)
2389 {
2390 	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2391 
2392 	if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2393 	    shdr->Status != STATUS_USER_SESSION_DELETED)
2394 		return false;
2395 
2396 	trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2397 			       le64_to_cpu(shdr->SessionId),
2398 			       le16_to_cpu(shdr->Command),
2399 			       le64_to_cpu(shdr->MessageId));
2400 	cifs_dbg(FYI, "Session expired or deleted\n");
2401 
2402 	return true;
2403 }
2404 
2405 static bool
smb2_is_status_io_timeout(char * buf)2406 smb2_is_status_io_timeout(char *buf)
2407 {
2408 	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2409 
2410 	if (shdr->Status == STATUS_IO_TIMEOUT)
2411 		return true;
2412 	else
2413 		return false;
2414 }
2415 
2416 static bool
smb2_is_network_name_deleted(char * buf,struct TCP_Server_Info * server)2417 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2418 {
2419 	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2420 	struct TCP_Server_Info *pserver;
2421 	struct cifs_ses *ses;
2422 	struct cifs_tcon *tcon;
2423 
2424 	if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2425 		return false;
2426 
2427 	/* If server is a channel, select the primary channel */
2428 	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2429 
2430 	spin_lock(&cifs_tcp_ses_lock);
2431 	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2432 		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2433 			if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2434 				spin_lock(&tcon->tc_lock);
2435 				tcon->need_reconnect = true;
2436 				spin_unlock(&tcon->tc_lock);
2437 				spin_unlock(&cifs_tcp_ses_lock);
2438 				pr_warn_once("Server share %s deleted.\n",
2439 					     tcon->tree_name);
2440 				return true;
2441 			}
2442 		}
2443 	}
2444 	spin_unlock(&cifs_tcp_ses_lock);
2445 
2446 	return false;
2447 }
2448 
2449 static int
smb2_oplock_response(struct cifs_tcon * tcon,__u64 persistent_fid,__u64 volatile_fid,__u16 net_fid,struct cifsInodeInfo * cinode)2450 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2451 		__u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2452 {
2453 	if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2454 		return SMB2_lease_break(0, tcon, cinode->lease_key,
2455 					smb2_get_lease_state(cinode));
2456 
2457 	return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2458 				 CIFS_CACHE_READ(cinode) ? 1 : 0);
2459 }
2460 
2461 void
smb2_set_related(struct smb_rqst * rqst)2462 smb2_set_related(struct smb_rqst *rqst)
2463 {
2464 	struct smb2_hdr *shdr;
2465 
2466 	shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2467 	if (shdr == NULL) {
2468 		cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2469 		return;
2470 	}
2471 	shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2472 }
2473 
2474 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2475 
2476 void
smb2_set_next_command(struct cifs_tcon * tcon,struct smb_rqst * rqst)2477 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2478 {
2479 	struct smb2_hdr *shdr;
2480 	struct cifs_ses *ses = tcon->ses;
2481 	struct TCP_Server_Info *server = ses->server;
2482 	unsigned long len = smb_rqst_len(server, rqst);
2483 	int i, num_padding;
2484 
2485 	shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2486 	if (shdr == NULL) {
2487 		cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2488 		return;
2489 	}
2490 
2491 	/* SMB headers in a compound are 8 byte aligned. */
2492 
2493 	/* No padding needed */
2494 	if (!(len & 7))
2495 		goto finished;
2496 
2497 	num_padding = 8 - (len & 7);
2498 	if (!smb3_encryption_required(tcon)) {
2499 		/*
2500 		 * If we do not have encryption then we can just add an extra
2501 		 * iov for the padding.
2502 		 */
2503 		rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2504 		rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2505 		rqst->rq_nvec++;
2506 		len += num_padding;
2507 	} else {
2508 		/*
2509 		 * We can not add a small padding iov for the encryption case
2510 		 * because the encryption framework can not handle the padding
2511 		 * iovs.
2512 		 * We have to flatten this into a single buffer and add
2513 		 * the padding to it.
2514 		 */
2515 		for (i = 1; i < rqst->rq_nvec; i++) {
2516 			memcpy(rqst->rq_iov[0].iov_base +
2517 			       rqst->rq_iov[0].iov_len,
2518 			       rqst->rq_iov[i].iov_base,
2519 			       rqst->rq_iov[i].iov_len);
2520 			rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2521 		}
2522 		memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2523 		       0, num_padding);
2524 		rqst->rq_iov[0].iov_len += num_padding;
2525 		len += num_padding;
2526 		rqst->rq_nvec = 1;
2527 	}
2528 
2529  finished:
2530 	shdr->NextCommand = cpu_to_le32(len);
2531 }
2532 
2533 /*
2534  * Passes the query info response back to the caller on success.
2535  * Caller need to free this with free_rsp_buf().
2536  */
2537 int
smb2_query_info_compound(const unsigned int xid,struct cifs_tcon * tcon,const char * path,u32 desired_access,u32 class,u32 type,u32 output_len,struct kvec * rsp,int * buftype,struct cifs_sb_info * cifs_sb)2538 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2539 			 const char *path, u32 desired_access,
2540 			 u32 class, u32 type, u32 output_len,
2541 			 struct kvec *rsp, int *buftype,
2542 			 struct cifs_sb_info *cifs_sb)
2543 {
2544 	struct smb2_compound_vars *vars;
2545 	struct cifs_ses *ses = tcon->ses;
2546 	struct TCP_Server_Info *server = cifs_pick_channel(ses);
2547 	int flags = CIFS_CP_CREATE_CLOSE_OP;
2548 	struct smb_rqst *rqst;
2549 	int resp_buftype[3];
2550 	struct kvec *rsp_iov;
2551 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2552 	struct cifs_open_parms oparms;
2553 	struct cifs_fid fid;
2554 	int rc;
2555 	__le16 *utf16_path;
2556 	struct cached_fid *cfid = NULL;
2557 
2558 	if (!path)
2559 		path = "";
2560 	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2561 	if (!utf16_path)
2562 		return -ENOMEM;
2563 
2564 	if (smb3_encryption_required(tcon))
2565 		flags |= CIFS_TRANSFORM_REQ;
2566 
2567 	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2568 	vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2569 	if (!vars) {
2570 		rc = -ENOMEM;
2571 		goto out_free_path;
2572 	}
2573 	rqst = vars->rqst;
2574 	rsp_iov = vars->rsp_iov;
2575 
2576 	/*
2577 	 * We can only call this for things we know are directories.
2578 	 */
2579 	if (!strcmp(path, ""))
2580 		open_cached_dir(xid, tcon, path, cifs_sb, false,
2581 				&cfid); /* cfid null if open dir failed */
2582 
2583 	rqst[0].rq_iov = vars->open_iov;
2584 	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2585 
2586 	oparms = (struct cifs_open_parms) {
2587 		.tcon = tcon,
2588 		.path = path,
2589 		.desired_access = desired_access,
2590 		.disposition = FILE_OPEN,
2591 		.create_options = cifs_create_options(cifs_sb, 0),
2592 		.fid = &fid,
2593 	};
2594 
2595 	rc = SMB2_open_init(tcon, server,
2596 			    &rqst[0], &oplock, &oparms, utf16_path);
2597 	if (rc)
2598 		goto qic_exit;
2599 	smb2_set_next_command(tcon, &rqst[0]);
2600 
2601 	rqst[1].rq_iov = &vars->qi_iov;
2602 	rqst[1].rq_nvec = 1;
2603 
2604 	if (cfid) {
2605 		rc = SMB2_query_info_init(tcon, server,
2606 					  &rqst[1],
2607 					  cfid->fid.persistent_fid,
2608 					  cfid->fid.volatile_fid,
2609 					  class, type, 0,
2610 					  output_len, 0,
2611 					  NULL);
2612 	} else {
2613 		rc = SMB2_query_info_init(tcon, server,
2614 					  &rqst[1],
2615 					  COMPOUND_FID,
2616 					  COMPOUND_FID,
2617 					  class, type, 0,
2618 					  output_len, 0,
2619 					  NULL);
2620 	}
2621 	if (rc)
2622 		goto qic_exit;
2623 	if (!cfid) {
2624 		smb2_set_next_command(tcon, &rqst[1]);
2625 		smb2_set_related(&rqst[1]);
2626 	}
2627 
2628 	rqst[2].rq_iov = &vars->close_iov;
2629 	rqst[2].rq_nvec = 1;
2630 
2631 	rc = SMB2_close_init(tcon, server,
2632 			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2633 	if (rc)
2634 		goto qic_exit;
2635 	smb2_set_related(&rqst[2]);
2636 
2637 	if (cfid) {
2638 		rc = compound_send_recv(xid, ses, server,
2639 					flags, 1, &rqst[1],
2640 					&resp_buftype[1], &rsp_iov[1]);
2641 	} else {
2642 		rc = compound_send_recv(xid, ses, server,
2643 					flags, 3, rqst,
2644 					resp_buftype, rsp_iov);
2645 	}
2646 	if (rc) {
2647 		free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2648 		if (rc == -EREMCHG) {
2649 			tcon->need_reconnect = true;
2650 			pr_warn_once("server share %s deleted\n",
2651 				     tcon->tree_name);
2652 		}
2653 		goto qic_exit;
2654 	}
2655 	*rsp = rsp_iov[1];
2656 	*buftype = resp_buftype[1];
2657 
2658  qic_exit:
2659 	SMB2_open_free(&rqst[0]);
2660 	SMB2_query_info_free(&rqst[1]);
2661 	SMB2_close_free(&rqst[2]);
2662 	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2663 	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2664 	if (cfid)
2665 		close_cached_dir(cfid);
2666 	kfree(vars);
2667 out_free_path:
2668 	kfree(utf16_path);
2669 	return rc;
2670 }
2671 
2672 static int
smb2_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2673 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2674 	     struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2675 {
2676 	struct smb2_query_info_rsp *rsp;
2677 	struct smb2_fs_full_size_info *info = NULL;
2678 	struct kvec rsp_iov = {NULL, 0};
2679 	int buftype = CIFS_NO_BUFFER;
2680 	int rc;
2681 
2682 
2683 	rc = smb2_query_info_compound(xid, tcon, "",
2684 				      FILE_READ_ATTRIBUTES,
2685 				      FS_FULL_SIZE_INFORMATION,
2686 				      SMB2_O_INFO_FILESYSTEM,
2687 				      sizeof(struct smb2_fs_full_size_info),
2688 				      &rsp_iov, &buftype, cifs_sb);
2689 	if (rc)
2690 		goto qfs_exit;
2691 
2692 	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2693 	buf->f_type = SMB2_SUPER_MAGIC;
2694 	info = (struct smb2_fs_full_size_info *)(
2695 		le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2696 	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2697 			       le32_to_cpu(rsp->OutputBufferLength),
2698 			       &rsp_iov,
2699 			       sizeof(struct smb2_fs_full_size_info));
2700 	if (!rc)
2701 		smb2_copy_fs_info_to_kstatfs(info, buf);
2702 
2703 qfs_exit:
2704 	trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2705 	free_rsp_buf(buftype, rsp_iov.iov_base);
2706 	return rc;
2707 }
2708 
2709 static int
smb311_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2710 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2711 	       struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2712 {
2713 	int rc;
2714 	__le16 srch_path = 0; /* Null - open root of share */
2715 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2716 	struct cifs_open_parms oparms;
2717 	struct cifs_fid fid;
2718 
2719 	if (!tcon->posix_extensions)
2720 		return smb2_queryfs(xid, tcon, cifs_sb, buf);
2721 
2722 	oparms = (struct cifs_open_parms) {
2723 		.tcon = tcon,
2724 		.path = "",
2725 		.desired_access = FILE_READ_ATTRIBUTES,
2726 		.disposition = FILE_OPEN,
2727 		.create_options = cifs_create_options(cifs_sb, 0),
2728 		.fid = &fid,
2729 	};
2730 
2731 	rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2732 		       NULL, NULL);
2733 	if (rc)
2734 		return rc;
2735 
2736 	rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2737 				   fid.volatile_fid, buf);
2738 	buf->f_type = SMB2_SUPER_MAGIC;
2739 	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2740 	return rc;
2741 }
2742 
2743 static bool
smb2_compare_fids(struct cifsFileInfo * ob1,struct cifsFileInfo * ob2)2744 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2745 {
2746 	return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2747 	       ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2748 }
2749 
2750 static int
smb2_mand_lock(const unsigned int xid,struct cifsFileInfo * cfile,__u64 offset,__u64 length,__u32 type,int lock,int unlock,bool wait)2751 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2752 	       __u64 length, __u32 type, int lock, int unlock, bool wait)
2753 {
2754 	if (unlock && !lock)
2755 		type = SMB2_LOCKFLAG_UNLOCK;
2756 	return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2757 			 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2758 			 current->tgid, length, offset, type, wait);
2759 }
2760 
2761 static void
smb2_get_lease_key(struct inode * inode,struct cifs_fid * fid)2762 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2763 {
2764 	memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2765 }
2766 
2767 static void
smb2_set_lease_key(struct inode * inode,struct cifs_fid * fid)2768 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2769 {
2770 	memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2771 }
2772 
2773 static void
smb2_new_lease_key(struct cifs_fid * fid)2774 smb2_new_lease_key(struct cifs_fid *fid)
2775 {
2776 	generate_random_uuid(fid->lease_key);
2777 }
2778 
2779 static int
smb2_get_dfs_refer(const unsigned int xid,struct cifs_ses * ses,const char * search_name,struct dfs_info3_param ** target_nodes,unsigned int * num_of_nodes,const struct nls_table * nls_codepage,int remap)2780 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2781 		   const char *search_name,
2782 		   struct dfs_info3_param **target_nodes,
2783 		   unsigned int *num_of_nodes,
2784 		   const struct nls_table *nls_codepage, int remap)
2785 {
2786 	int rc;
2787 	__le16 *utf16_path = NULL;
2788 	int utf16_path_len = 0;
2789 	struct cifs_tcon *tcon;
2790 	struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2791 	struct get_dfs_referral_rsp *dfs_rsp = NULL;
2792 	u32 dfs_req_size = 0, dfs_rsp_size = 0;
2793 	int retry_count = 0;
2794 
2795 	cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2796 
2797 	/*
2798 	 * Try to use the IPC tcon, otherwise just use any
2799 	 */
2800 	tcon = ses->tcon_ipc;
2801 	if (tcon == NULL) {
2802 		spin_lock(&cifs_tcp_ses_lock);
2803 		tcon = list_first_entry_or_null(&ses->tcon_list,
2804 						struct cifs_tcon,
2805 						tcon_list);
2806 		if (tcon)
2807 			tcon->tc_count++;
2808 		spin_unlock(&cifs_tcp_ses_lock);
2809 	}
2810 
2811 	if (tcon == NULL) {
2812 		cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2813 			 ses);
2814 		rc = -ENOTCONN;
2815 		goto out;
2816 	}
2817 
2818 	utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2819 					   &utf16_path_len,
2820 					   nls_codepage, remap);
2821 	if (!utf16_path) {
2822 		rc = -ENOMEM;
2823 		goto out;
2824 	}
2825 
2826 	dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2827 	dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2828 	if (!dfs_req) {
2829 		rc = -ENOMEM;
2830 		goto out;
2831 	}
2832 
2833 	/* Highest DFS referral version understood */
2834 	dfs_req->MaxReferralLevel = DFS_VERSION;
2835 
2836 	/* Path to resolve in an UTF-16 null-terminated string */
2837 	memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2838 
2839 	do {
2840 		rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2841 				FSCTL_DFS_GET_REFERRALS,
2842 				(char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2843 				(char **)&dfs_rsp, &dfs_rsp_size);
2844 		if (!is_retryable_error(rc))
2845 			break;
2846 		usleep_range(512, 2048);
2847 	} while (++retry_count < 5);
2848 
2849 	if (!rc && !dfs_rsp)
2850 		rc = -EIO;
2851 	if (rc) {
2852 		if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2853 			cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2854 		goto out;
2855 	}
2856 
2857 	rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2858 				 num_of_nodes, target_nodes,
2859 				 nls_codepage, remap, search_name,
2860 				 true /* is_unicode */);
2861 	if (rc) {
2862 		cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2863 		goto out;
2864 	}
2865 
2866  out:
2867 	if (tcon && !tcon->ipc) {
2868 		/* ipc tcons are not refcounted */
2869 		spin_lock(&cifs_tcp_ses_lock);
2870 		tcon->tc_count--;
2871 		/* tc_count can never go negative */
2872 		WARN_ON(tcon->tc_count < 0);
2873 		spin_unlock(&cifs_tcp_ses_lock);
2874 	}
2875 	kfree(utf16_path);
2876 	kfree(dfs_req);
2877 	kfree(dfs_rsp);
2878 	return rc;
2879 }
2880 
2881 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
parse_reparse_posix(struct reparse_posix_data * buf,struct cifs_sb_info * cifs_sb,struct cifs_open_info_data * data)2882 static int parse_reparse_posix(struct reparse_posix_data *buf,
2883 			       struct cifs_sb_info *cifs_sb,
2884 			       struct cifs_open_info_data *data)
2885 {
2886 	unsigned int len;
2887 	u64 type;
2888 
2889 	switch ((type = le64_to_cpu(buf->InodeType))) {
2890 	case NFS_SPECFILE_LNK:
2891 		len = le16_to_cpu(buf->ReparseDataLength);
2892 		data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
2893 							       len, true,
2894 							       cifs_sb->local_nls);
2895 		if (!data->symlink_target)
2896 			return -ENOMEM;
2897 		convert_delimiter(data->symlink_target, '/');
2898 		cifs_dbg(FYI, "%s: target path: %s\n",
2899 			 __func__, data->symlink_target);
2900 		break;
2901 	case NFS_SPECFILE_CHR:
2902 	case NFS_SPECFILE_BLK:
2903 	case NFS_SPECFILE_FIFO:
2904 	case NFS_SPECFILE_SOCK:
2905 		break;
2906 	default:
2907 		cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
2908 			 __func__, type);
2909 		return -EOPNOTSUPP;
2910 	}
2911 	return 0;
2912 }
2913 
parse_reparse_symlink(struct reparse_symlink_data_buffer * sym,u32 plen,bool unicode,struct cifs_sb_info * cifs_sb,struct cifs_open_info_data * data)2914 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
2915 				 u32 plen, bool unicode,
2916 				 struct cifs_sb_info *cifs_sb,
2917 				 struct cifs_open_info_data *data)
2918 {
2919 	unsigned int len;
2920 	unsigned int offs;
2921 
2922 	/* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2923 
2924 	offs = le16_to_cpu(sym->SubstituteNameOffset);
2925 	len = le16_to_cpu(sym->SubstituteNameLength);
2926 	if (offs + 20 > plen || offs + len + 20 > plen) {
2927 		cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2928 		return -EIO;
2929 	}
2930 
2931 	data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
2932 						       len, unicode,
2933 						       cifs_sb->local_nls);
2934 	if (!data->symlink_target)
2935 		return -ENOMEM;
2936 
2937 	convert_delimiter(data->symlink_target, '/');
2938 	cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
2939 
2940 	return 0;
2941 }
2942 
parse_reparse_point(struct reparse_data_buffer * buf,u32 plen,struct cifs_sb_info * cifs_sb,bool unicode,struct cifs_open_info_data * data)2943 int parse_reparse_point(struct reparse_data_buffer *buf,
2944 			u32 plen, struct cifs_sb_info *cifs_sb,
2945 			bool unicode, struct cifs_open_info_data *data)
2946 {
2947 	if (plen < sizeof(*buf)) {
2948 		cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2949 			 __func__, plen);
2950 		return -EIO;
2951 	}
2952 
2953 	if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) {
2954 		cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n",
2955 			 __func__, plen);
2956 		return -EIO;
2957 	}
2958 
2959 	data->reparse.buf = buf;
2960 
2961 	/* See MS-FSCC 2.1.2 */
2962 	switch (le32_to_cpu(buf->ReparseTag)) {
2963 	case IO_REPARSE_TAG_NFS:
2964 		return parse_reparse_posix((struct reparse_posix_data *)buf,
2965 					   cifs_sb, data);
2966 	case IO_REPARSE_TAG_SYMLINK:
2967 		return parse_reparse_symlink(
2968 			(struct reparse_symlink_data_buffer *)buf,
2969 			plen, unicode, cifs_sb, data);
2970 	case IO_REPARSE_TAG_LX_SYMLINK:
2971 	case IO_REPARSE_TAG_AF_UNIX:
2972 	case IO_REPARSE_TAG_LX_FIFO:
2973 	case IO_REPARSE_TAG_LX_CHR:
2974 	case IO_REPARSE_TAG_LX_BLK:
2975 		return 0;
2976 	default:
2977 		cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
2978 			 __func__, le32_to_cpu(buf->ReparseTag));
2979 		return -EOPNOTSUPP;
2980 	}
2981 }
2982 
smb2_parse_reparse_point(struct cifs_sb_info * cifs_sb,struct kvec * rsp_iov,struct cifs_open_info_data * data)2983 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
2984 				    struct kvec *rsp_iov,
2985 				    struct cifs_open_info_data *data)
2986 {
2987 	struct reparse_data_buffer *buf;
2988 	struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2989 	u32 plen = le32_to_cpu(io->OutputCount);
2990 
2991 	buf = (struct reparse_data_buffer *)((u8 *)io +
2992 					     le32_to_cpu(io->OutputOffset));
2993 	return parse_reparse_point(buf, plen, cifs_sb, true, data);
2994 }
2995 
smb2_query_reparse_point(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,u32 * tag,struct kvec * rsp,int * rsp_buftype)2996 static int smb2_query_reparse_point(const unsigned int xid,
2997 				    struct cifs_tcon *tcon,
2998 				    struct cifs_sb_info *cifs_sb,
2999 				    const char *full_path,
3000 				    u32 *tag, struct kvec *rsp,
3001 				    int *rsp_buftype)
3002 {
3003 	struct smb2_compound_vars *vars;
3004 	int rc;
3005 	__le16 *utf16_path = NULL;
3006 	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3007 	struct cifs_open_parms oparms;
3008 	struct cifs_fid fid;
3009 	struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3010 	int flags = CIFS_CP_CREATE_CLOSE_OP;
3011 	struct smb_rqst *rqst;
3012 	int resp_buftype[3];
3013 	struct kvec *rsp_iov;
3014 	struct smb2_ioctl_rsp *ioctl_rsp;
3015 	struct reparse_data_buffer *reparse_buf;
3016 	u32 off, count, len;
3017 
3018 	cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3019 
3020 	if (smb3_encryption_required(tcon))
3021 		flags |= CIFS_TRANSFORM_REQ;
3022 
3023 	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3024 	if (!utf16_path)
3025 		return -ENOMEM;
3026 
3027 	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3028 	vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3029 	if (!vars) {
3030 		rc = -ENOMEM;
3031 		goto out_free_path;
3032 	}
3033 	rqst = vars->rqst;
3034 	rsp_iov = vars->rsp_iov;
3035 
3036 	/*
3037 	 * setup smb2open - TODO add optimization to call cifs_get_readable_path
3038 	 * to see if there is a handle already open that we can use
3039 	 */
3040 	rqst[0].rq_iov = vars->open_iov;
3041 	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3042 
3043 	oparms = (struct cifs_open_parms) {
3044 		.tcon = tcon,
3045 		.path = full_path,
3046 		.desired_access = FILE_READ_ATTRIBUTES,
3047 		.disposition = FILE_OPEN,
3048 		.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3049 		.fid = &fid,
3050 	};
3051 
3052 	rc = SMB2_open_init(tcon, server,
3053 			    &rqst[0], &oplock, &oparms, utf16_path);
3054 	if (rc)
3055 		goto query_rp_exit;
3056 	smb2_set_next_command(tcon, &rqst[0]);
3057 
3058 
3059 	/* IOCTL */
3060 	rqst[1].rq_iov = vars->io_iov;
3061 	rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3062 
3063 	rc = SMB2_ioctl_init(tcon, server,
3064 			     &rqst[1], COMPOUND_FID,
3065 			     COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3066 			     CIFSMaxBufSize -
3067 			     MAX_SMB2_CREATE_RESPONSE_SIZE -
3068 			     MAX_SMB2_CLOSE_RESPONSE_SIZE);
3069 	if (rc)
3070 		goto query_rp_exit;
3071 
3072 	smb2_set_next_command(tcon, &rqst[1]);
3073 	smb2_set_related(&rqst[1]);
3074 
3075 	/* Close */
3076 	rqst[2].rq_iov = &vars->close_iov;
3077 	rqst[2].rq_nvec = 1;
3078 
3079 	rc = SMB2_close_init(tcon, server,
3080 			     &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3081 	if (rc)
3082 		goto query_rp_exit;
3083 
3084 	smb2_set_related(&rqst[2]);
3085 
3086 	rc = compound_send_recv(xid, tcon->ses, server,
3087 				flags, 3, rqst,
3088 				resp_buftype, rsp_iov);
3089 
3090 	ioctl_rsp = rsp_iov[1].iov_base;
3091 
3092 	/*
3093 	 * Open was successful and we got an ioctl response.
3094 	 */
3095 	if (rc == 0) {
3096 		/* See MS-FSCC 2.3.23 */
3097 		off = le32_to_cpu(ioctl_rsp->OutputOffset);
3098 		count = le32_to_cpu(ioctl_rsp->OutputCount);
3099 		if (check_add_overflow(off, count, &len) ||
3100 		    len > rsp_iov[1].iov_len) {
3101 			cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3102 				      __func__, off, count);
3103 			rc = -EIO;
3104 			goto query_rp_exit;
3105 		}
3106 
3107 		reparse_buf = (void *)((u8 *)ioctl_rsp + off);
3108 		len = sizeof(*reparse_buf);
3109 		if (count < len ||
3110 		    count < le16_to_cpu(reparse_buf->ReparseDataLength) + len) {
3111 			cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3112 				      __func__, off, count);
3113 			rc = -EIO;
3114 			goto query_rp_exit;
3115 		}
3116 		*tag = le32_to_cpu(reparse_buf->ReparseTag);
3117 		*rsp = rsp_iov[1];
3118 		*rsp_buftype = resp_buftype[1];
3119 		resp_buftype[1] = CIFS_NO_BUFFER;
3120 	}
3121 
3122  query_rp_exit:
3123 	SMB2_open_free(&rqst[0]);
3124 	SMB2_ioctl_free(&rqst[1]);
3125 	SMB2_close_free(&rqst[2]);
3126 	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3127 	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3128 	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3129 	kfree(vars);
3130 out_free_path:
3131 	kfree(utf16_path);
3132 	return rc;
3133 }
3134 
3135 static struct cifs_ntsd *
get_smb2_acl_by_fid(struct cifs_sb_info * cifs_sb,const struct cifs_fid * cifsfid,u32 * pacllen,u32 info)3136 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3137 		    const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3138 {
3139 	struct cifs_ntsd *pntsd = NULL;
3140 	unsigned int xid;
3141 	int rc = -EOPNOTSUPP;
3142 	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3143 
3144 	if (IS_ERR(tlink))
3145 		return ERR_CAST(tlink);
3146 
3147 	xid = get_xid();
3148 	cifs_dbg(FYI, "trying to get acl\n");
3149 
3150 	rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3151 			    cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3152 			    info);
3153 	free_xid(xid);
3154 
3155 	cifs_put_tlink(tlink);
3156 
3157 	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3158 	if (rc)
3159 		return ERR_PTR(rc);
3160 	return pntsd;
3161 
3162 }
3163 
3164 static struct cifs_ntsd *
get_smb2_acl_by_path(struct cifs_sb_info * cifs_sb,const char * path,u32 * pacllen,u32 info)3165 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3166 		     const char *path, u32 *pacllen, u32 info)
3167 {
3168 	struct cifs_ntsd *pntsd = NULL;
3169 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3170 	unsigned int xid;
3171 	int rc;
3172 	struct cifs_tcon *tcon;
3173 	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3174 	struct cifs_fid fid;
3175 	struct cifs_open_parms oparms;
3176 	__le16 *utf16_path;
3177 
3178 	cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3179 	if (IS_ERR(tlink))
3180 		return ERR_CAST(tlink);
3181 
3182 	tcon = tlink_tcon(tlink);
3183 	xid = get_xid();
3184 
3185 	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3186 	if (!utf16_path) {
3187 		rc = -ENOMEM;
3188 		free_xid(xid);
3189 		return ERR_PTR(rc);
3190 	}
3191 
3192 	oparms = (struct cifs_open_parms) {
3193 		.tcon = tcon,
3194 		.path = path,
3195 		.desired_access = READ_CONTROL,
3196 		.disposition = FILE_OPEN,
3197 		/*
3198 		 * When querying an ACL, even if the file is a symlink
3199 		 * we want to open the source not the target, and so
3200 		 * the protocol requires that the client specify this
3201 		 * flag when opening a reparse point
3202 		 */
3203 		.create_options = cifs_create_options(cifs_sb, 0) |
3204 				  OPEN_REPARSE_POINT,
3205 		.fid = &fid,
3206 	};
3207 
3208 	if (info & SACL_SECINFO)
3209 		oparms.desired_access |= SYSTEM_SECURITY;
3210 
3211 	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3212 		       NULL);
3213 	kfree(utf16_path);
3214 	if (!rc) {
3215 		rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3216 				    fid.volatile_fid, (void **)&pntsd, pacllen,
3217 				    info);
3218 		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3219 	}
3220 
3221 	cifs_put_tlink(tlink);
3222 	free_xid(xid);
3223 
3224 	cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3225 	if (rc)
3226 		return ERR_PTR(rc);
3227 	return pntsd;
3228 }
3229 
3230 static int
set_smb2_acl(struct cifs_ntsd * pnntsd,__u32 acllen,struct inode * inode,const char * path,int aclflag)3231 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3232 		struct inode *inode, const char *path, int aclflag)
3233 {
3234 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3235 	unsigned int xid;
3236 	int rc, access_flags = 0;
3237 	struct cifs_tcon *tcon;
3238 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3239 	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3240 	struct cifs_fid fid;
3241 	struct cifs_open_parms oparms;
3242 	__le16 *utf16_path;
3243 
3244 	cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3245 	if (IS_ERR(tlink))
3246 		return PTR_ERR(tlink);
3247 
3248 	tcon = tlink_tcon(tlink);
3249 	xid = get_xid();
3250 
3251 	if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3252 		access_flags |= WRITE_OWNER;
3253 	if (aclflag & CIFS_ACL_SACL)
3254 		access_flags |= SYSTEM_SECURITY;
3255 	if (aclflag & CIFS_ACL_DACL)
3256 		access_flags |= WRITE_DAC;
3257 
3258 	utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3259 	if (!utf16_path) {
3260 		rc = -ENOMEM;
3261 		free_xid(xid);
3262 		return rc;
3263 	}
3264 
3265 	oparms = (struct cifs_open_parms) {
3266 		.tcon = tcon,
3267 		.desired_access = access_flags,
3268 		.create_options = cifs_create_options(cifs_sb, 0),
3269 		.disposition = FILE_OPEN,
3270 		.path = path,
3271 		.fid = &fid,
3272 	};
3273 
3274 	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3275 		       NULL, NULL);
3276 	kfree(utf16_path);
3277 	if (!rc) {
3278 		rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3279 			    fid.volatile_fid, pnntsd, acllen, aclflag);
3280 		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3281 	}
3282 
3283 	cifs_put_tlink(tlink);
3284 	free_xid(xid);
3285 	return rc;
3286 }
3287 
3288 /* Retrieve an ACL from the server */
3289 static struct cifs_ntsd *
get_smb2_acl(struct cifs_sb_info * cifs_sb,struct inode * inode,const char * path,u32 * pacllen,u32 info)3290 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3291 	     struct inode *inode, const char *path,
3292 	     u32 *pacllen, u32 info)
3293 {
3294 	struct cifs_ntsd *pntsd = NULL;
3295 	struct cifsFileInfo *open_file = NULL;
3296 
3297 	if (inode && !(info & SACL_SECINFO))
3298 		open_file = find_readable_file(CIFS_I(inode), true);
3299 	if (!open_file || (info & SACL_SECINFO))
3300 		return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3301 
3302 	pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3303 	cifsFileInfo_put(open_file);
3304 	return pntsd;
3305 }
3306 
smb3_zero_data(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len,unsigned int xid)3307 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3308 			     loff_t offset, loff_t len, unsigned int xid)
3309 {
3310 	struct cifsFileInfo *cfile = file->private_data;
3311 	struct file_zero_data_information fsctl_buf;
3312 
3313 	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3314 
3315 	fsctl_buf.FileOffset = cpu_to_le64(offset);
3316 	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3317 
3318 	return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3319 			  cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3320 			  (char *)&fsctl_buf,
3321 			  sizeof(struct file_zero_data_information),
3322 			  0, NULL, NULL);
3323 }
3324 
smb3_zero_range(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len,bool keep_size)3325 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3326 			    loff_t offset, loff_t len, bool keep_size)
3327 {
3328 	struct cifs_ses *ses = tcon->ses;
3329 	struct inode *inode = file_inode(file);
3330 	struct cifsInodeInfo *cifsi = CIFS_I(inode);
3331 	struct cifsFileInfo *cfile = file->private_data;
3332 	unsigned long long new_size;
3333 	long rc;
3334 	unsigned int xid;
3335 	__le64 eof;
3336 
3337 	xid = get_xid();
3338 
3339 	trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3340 			      ses->Suid, offset, len);
3341 
3342 	inode_lock(inode);
3343 	filemap_invalidate_lock(inode->i_mapping);
3344 
3345 	/*
3346 	 * We zero the range through ioctl, so we need remove the page caches
3347 	 * first, otherwise the data may be inconsistent with the server.
3348 	 */
3349 	truncate_pagecache_range(inode, offset, offset + len - 1);
3350 
3351 	/* if file not oplocked can't be sure whether asking to extend size */
3352 	rc = -EOPNOTSUPP;
3353 	if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3354 		goto zero_range_exit;
3355 
3356 	rc = smb3_zero_data(file, tcon, offset, len, xid);
3357 	if (rc < 0)
3358 		goto zero_range_exit;
3359 
3360 	/*
3361 	 * do we also need to change the size of the file?
3362 	 */
3363 	new_size = offset + len;
3364 	if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3365 		eof = cpu_to_le64(new_size);
3366 		rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3367 				  cfile->fid.volatile_fid, cfile->pid, &eof);
3368 		if (rc >= 0) {
3369 			truncate_setsize(inode, new_size);
3370 			fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3371 		}
3372 	}
3373 
3374  zero_range_exit:
3375 	filemap_invalidate_unlock(inode->i_mapping);
3376 	inode_unlock(inode);
3377 	free_xid(xid);
3378 	if (rc)
3379 		trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3380 			      ses->Suid, offset, len, rc);
3381 	else
3382 		trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3383 			      ses->Suid, offset, len);
3384 	return rc;
3385 }
3386 
smb3_punch_hole(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len)3387 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3388 			    loff_t offset, loff_t len)
3389 {
3390 	struct inode *inode = file_inode(file);
3391 	struct cifsFileInfo *cfile = file->private_data;
3392 	struct file_zero_data_information fsctl_buf;
3393 	long rc;
3394 	unsigned int xid;
3395 	__u8 set_sparse = 1;
3396 
3397 	xid = get_xid();
3398 
3399 	inode_lock(inode);
3400 	/* Need to make file sparse, if not already, before freeing range. */
3401 	/* Consider adding equivalent for compressed since it could also work */
3402 	if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3403 		rc = -EOPNOTSUPP;
3404 		goto out;
3405 	}
3406 
3407 	filemap_invalidate_lock(inode->i_mapping);
3408 	/*
3409 	 * We implement the punch hole through ioctl, so we need remove the page
3410 	 * caches first, otherwise the data may be inconsistent with the server.
3411 	 */
3412 	truncate_pagecache_range(inode, offset, offset + len - 1);
3413 
3414 	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3415 
3416 	fsctl_buf.FileOffset = cpu_to_le64(offset);
3417 	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3418 
3419 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3420 			cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3421 			(char *)&fsctl_buf,
3422 			sizeof(struct file_zero_data_information),
3423 			CIFSMaxBufSize, NULL, NULL);
3424 	filemap_invalidate_unlock(inode->i_mapping);
3425 out:
3426 	inode_unlock(inode);
3427 	free_xid(xid);
3428 	return rc;
3429 }
3430 
smb3_simple_fallocate_write_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len,char * buf)3431 static int smb3_simple_fallocate_write_range(unsigned int xid,
3432 					     struct cifs_tcon *tcon,
3433 					     struct cifsFileInfo *cfile,
3434 					     loff_t off, loff_t len,
3435 					     char *buf)
3436 {
3437 	struct cifs_io_parms io_parms = {0};
3438 	int nbytes;
3439 	int rc = 0;
3440 	struct kvec iov[2];
3441 
3442 	io_parms.netfid = cfile->fid.netfid;
3443 	io_parms.pid = current->tgid;
3444 	io_parms.tcon = tcon;
3445 	io_parms.persistent_fid = cfile->fid.persistent_fid;
3446 	io_parms.volatile_fid = cfile->fid.volatile_fid;
3447 
3448 	while (len) {
3449 		io_parms.offset = off;
3450 		io_parms.length = len;
3451 		if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3452 			io_parms.length = SMB2_MAX_BUFFER_SIZE;
3453 		/* iov[0] is reserved for smb header */
3454 		iov[1].iov_base = buf;
3455 		iov[1].iov_len = io_parms.length;
3456 		rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3457 		if (rc)
3458 			break;
3459 		if (nbytes > len)
3460 			return -EINVAL;
3461 		buf += nbytes;
3462 		off += nbytes;
3463 		len -= nbytes;
3464 	}
3465 	return rc;
3466 }
3467 
smb3_simple_fallocate_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len)3468 static int smb3_simple_fallocate_range(unsigned int xid,
3469 				       struct cifs_tcon *tcon,
3470 				       struct cifsFileInfo *cfile,
3471 				       loff_t off, loff_t len)
3472 {
3473 	struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3474 	u32 out_data_len;
3475 	char *buf = NULL;
3476 	loff_t l;
3477 	int rc;
3478 
3479 	in_data.file_offset = cpu_to_le64(off);
3480 	in_data.length = cpu_to_le64(len);
3481 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3482 			cfile->fid.volatile_fid,
3483 			FSCTL_QUERY_ALLOCATED_RANGES,
3484 			(char *)&in_data, sizeof(in_data),
3485 			1024 * sizeof(struct file_allocated_range_buffer),
3486 			(char **)&out_data, &out_data_len);
3487 	if (rc)
3488 		goto out;
3489 
3490 	buf = kzalloc(1024 * 1024, GFP_KERNEL);
3491 	if (buf == NULL) {
3492 		rc = -ENOMEM;
3493 		goto out;
3494 	}
3495 
3496 	tmp_data = out_data;
3497 	while (len) {
3498 		/*
3499 		 * The rest of the region is unmapped so write it all.
3500 		 */
3501 		if (out_data_len == 0) {
3502 			rc = smb3_simple_fallocate_write_range(xid, tcon,
3503 					       cfile, off, len, buf);
3504 			goto out;
3505 		}
3506 
3507 		if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3508 			rc = -EINVAL;
3509 			goto out;
3510 		}
3511 
3512 		if (off < le64_to_cpu(tmp_data->file_offset)) {
3513 			/*
3514 			 * We are at a hole. Write until the end of the region
3515 			 * or until the next allocated data,
3516 			 * whichever comes next.
3517 			 */
3518 			l = le64_to_cpu(tmp_data->file_offset) - off;
3519 			if (len < l)
3520 				l = len;
3521 			rc = smb3_simple_fallocate_write_range(xid, tcon,
3522 					       cfile, off, l, buf);
3523 			if (rc)
3524 				goto out;
3525 			off = off + l;
3526 			len = len - l;
3527 			if (len == 0)
3528 				goto out;
3529 		}
3530 		/*
3531 		 * We are at a section of allocated data, just skip forward
3532 		 * until the end of the data or the end of the region
3533 		 * we are supposed to fallocate, whichever comes first.
3534 		 */
3535 		l = le64_to_cpu(tmp_data->length);
3536 		if (len < l)
3537 			l = len;
3538 		off += l;
3539 		len -= l;
3540 
3541 		tmp_data = &tmp_data[1];
3542 		out_data_len -= sizeof(struct file_allocated_range_buffer);
3543 	}
3544 
3545  out:
3546 	kfree(out_data);
3547 	kfree(buf);
3548 	return rc;
3549 }
3550 
3551 
smb3_simple_falloc(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len,bool keep_size)3552 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3553 			    loff_t off, loff_t len, bool keep_size)
3554 {
3555 	struct inode *inode;
3556 	struct cifsInodeInfo *cifsi;
3557 	struct cifsFileInfo *cfile = file->private_data;
3558 	long rc = -EOPNOTSUPP;
3559 	unsigned int xid;
3560 	__le64 eof;
3561 
3562 	xid = get_xid();
3563 
3564 	inode = d_inode(cfile->dentry);
3565 	cifsi = CIFS_I(inode);
3566 
3567 	trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3568 				tcon->ses->Suid, off, len);
3569 	/* if file not oplocked can't be sure whether asking to extend size */
3570 	if (!CIFS_CACHE_READ(cifsi))
3571 		if (keep_size == false) {
3572 			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3573 				tcon->tid, tcon->ses->Suid, off, len, rc);
3574 			free_xid(xid);
3575 			return rc;
3576 		}
3577 
3578 	/*
3579 	 * Extending the file
3580 	 */
3581 	if ((keep_size == false) && i_size_read(inode) < off + len) {
3582 		rc = inode_newsize_ok(inode, off + len);
3583 		if (rc)
3584 			goto out;
3585 
3586 		if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3587 			smb2_set_sparse(xid, tcon, cfile, inode, false);
3588 
3589 		eof = cpu_to_le64(off + len);
3590 		rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3591 				  cfile->fid.volatile_fid, cfile->pid, &eof);
3592 		if (rc == 0) {
3593 			cifsi->server_eof = off + len;
3594 			cifs_setsize(inode, off + len);
3595 			cifs_truncate_page(inode->i_mapping, inode->i_size);
3596 			truncate_setsize(inode, off + len);
3597 		}
3598 		goto out;
3599 	}
3600 
3601 	/*
3602 	 * Files are non-sparse by default so falloc may be a no-op
3603 	 * Must check if file sparse. If not sparse, and since we are not
3604 	 * extending then no need to do anything since file already allocated
3605 	 */
3606 	if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3607 		rc = 0;
3608 		goto out;
3609 	}
3610 
3611 	if (keep_size == true) {
3612 		/*
3613 		 * We can not preallocate pages beyond the end of the file
3614 		 * in SMB2
3615 		 */
3616 		if (off >= i_size_read(inode)) {
3617 			rc = 0;
3618 			goto out;
3619 		}
3620 		/*
3621 		 * For fallocates that are partially beyond the end of file,
3622 		 * clamp len so we only fallocate up to the end of file.
3623 		 */
3624 		if (off + len > i_size_read(inode)) {
3625 			len = i_size_read(inode) - off;
3626 		}
3627 	}
3628 
3629 	if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3630 		/*
3631 		 * At this point, we are trying to fallocate an internal
3632 		 * regions of a sparse file. Since smb2 does not have a
3633 		 * fallocate command we have two otions on how to emulate this.
3634 		 * We can either turn the entire file to become non-sparse
3635 		 * which we only do if the fallocate is for virtually
3636 		 * the whole file,  or we can overwrite the region with zeroes
3637 		 * using SMB2_write, which could be prohibitevly expensive
3638 		 * if len is large.
3639 		 */
3640 		/*
3641 		 * We are only trying to fallocate a small region so
3642 		 * just write it with zero.
3643 		 */
3644 		if (len <= 1024 * 1024) {
3645 			rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3646 							 off, len);
3647 			goto out;
3648 		}
3649 
3650 		/*
3651 		 * Check if falloc starts within first few pages of file
3652 		 * and ends within a few pages of the end of file to
3653 		 * ensure that most of file is being forced to be
3654 		 * fallocated now. If so then setting whole file sparse
3655 		 * ie potentially making a few extra pages at the beginning
3656 		 * or end of the file non-sparse via set_sparse is harmless.
3657 		 */
3658 		if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3659 			rc = -EOPNOTSUPP;
3660 			goto out;
3661 		}
3662 	}
3663 
3664 	smb2_set_sparse(xid, tcon, cfile, inode, false);
3665 	rc = 0;
3666 
3667 out:
3668 	if (rc)
3669 		trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3670 				tcon->ses->Suid, off, len, rc);
3671 	else
3672 		trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3673 				tcon->ses->Suid, off, len);
3674 
3675 	free_xid(xid);
3676 	return rc;
3677 }
3678 
smb3_collapse_range(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len)3679 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3680 			    loff_t off, loff_t len)
3681 {
3682 	int rc;
3683 	unsigned int xid;
3684 	struct inode *inode = file_inode(file);
3685 	struct cifsFileInfo *cfile = file->private_data;
3686 	struct cifsInodeInfo *cifsi = CIFS_I(inode);
3687 	__le64 eof;
3688 	loff_t old_eof;
3689 
3690 	xid = get_xid();
3691 
3692 	inode_lock(inode);
3693 
3694 	old_eof = i_size_read(inode);
3695 	if ((off >= old_eof) ||
3696 	    off + len >= old_eof) {
3697 		rc = -EINVAL;
3698 		goto out;
3699 	}
3700 
3701 	filemap_invalidate_lock(inode->i_mapping);
3702 	rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3703 	if (rc < 0)
3704 		goto out_2;
3705 
3706 	truncate_pagecache_range(inode, off, old_eof);
3707 
3708 	rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3709 				  old_eof - off - len, off);
3710 	if (rc < 0)
3711 		goto out_2;
3712 
3713 	eof = cpu_to_le64(old_eof - len);
3714 	rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3715 			  cfile->fid.volatile_fid, cfile->pid, &eof);
3716 	if (rc < 0)
3717 		goto out_2;
3718 
3719 	rc = 0;
3720 
3721 	cifsi->server_eof = i_size_read(inode) - len;
3722 	truncate_setsize(inode, cifsi->server_eof);
3723 	fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3724 out_2:
3725 	filemap_invalidate_unlock(inode->i_mapping);
3726  out:
3727 	inode_unlock(inode);
3728 	free_xid(xid);
3729 	return rc;
3730 }
3731 
smb3_insert_range(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len)3732 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3733 			      loff_t off, loff_t len)
3734 {
3735 	int rc;
3736 	unsigned int xid;
3737 	struct cifsFileInfo *cfile = file->private_data;
3738 	struct inode *inode = file_inode(file);
3739 	__le64 eof;
3740 	__u64  count, old_eof;
3741 
3742 	xid = get_xid();
3743 
3744 	inode_lock(inode);
3745 
3746 	old_eof = i_size_read(inode);
3747 	if (off >= old_eof) {
3748 		rc = -EINVAL;
3749 		goto out;
3750 	}
3751 
3752 	count = old_eof - off;
3753 	eof = cpu_to_le64(old_eof + len);
3754 
3755 	filemap_invalidate_lock(inode->i_mapping);
3756 	rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3757 	if (rc < 0)
3758 		goto out_2;
3759 	truncate_pagecache_range(inode, off, old_eof);
3760 
3761 	rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3762 			  cfile->fid.volatile_fid, cfile->pid, &eof);
3763 	if (rc < 0)
3764 		goto out_2;
3765 
3766 	truncate_setsize(inode, old_eof + len);
3767 	fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3768 
3769 	rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3770 	if (rc < 0)
3771 		goto out_2;
3772 
3773 	rc = smb3_zero_data(file, tcon, off, len, xid);
3774 	if (rc < 0)
3775 		goto out_2;
3776 
3777 	rc = 0;
3778 out_2:
3779 	filemap_invalidate_unlock(inode->i_mapping);
3780  out:
3781 	inode_unlock(inode);
3782 	free_xid(xid);
3783 	return rc;
3784 }
3785 
smb3_llseek(struct file * file,struct cifs_tcon * tcon,loff_t offset,int whence)3786 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3787 {
3788 	struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3789 	struct cifsInodeInfo *cifsi;
3790 	struct inode *inode;
3791 	int rc = 0;
3792 	struct file_allocated_range_buffer in_data, *out_data = NULL;
3793 	u32 out_data_len;
3794 	unsigned int xid;
3795 
3796 	if (whence != SEEK_HOLE && whence != SEEK_DATA)
3797 		return generic_file_llseek(file, offset, whence);
3798 
3799 	inode = d_inode(cfile->dentry);
3800 	cifsi = CIFS_I(inode);
3801 
3802 	if (offset < 0 || offset >= i_size_read(inode))
3803 		return -ENXIO;
3804 
3805 	xid = get_xid();
3806 	/*
3807 	 * We need to be sure that all dirty pages are written as they
3808 	 * might fill holes on the server.
3809 	 * Note that we also MUST flush any written pages since at least
3810 	 * some servers (Windows2016) will not reflect recent writes in
3811 	 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3812 	 */
3813 	wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3814 	if (wrcfile) {
3815 		filemap_write_and_wait(inode->i_mapping);
3816 		smb2_flush_file(xid, tcon, &wrcfile->fid);
3817 		cifsFileInfo_put(wrcfile);
3818 	}
3819 
3820 	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3821 		if (whence == SEEK_HOLE)
3822 			offset = i_size_read(inode);
3823 		goto lseek_exit;
3824 	}
3825 
3826 	in_data.file_offset = cpu_to_le64(offset);
3827 	in_data.length = cpu_to_le64(i_size_read(inode));
3828 
3829 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3830 			cfile->fid.volatile_fid,
3831 			FSCTL_QUERY_ALLOCATED_RANGES,
3832 			(char *)&in_data, sizeof(in_data),
3833 			sizeof(struct file_allocated_range_buffer),
3834 			(char **)&out_data, &out_data_len);
3835 	if (rc == -E2BIG)
3836 		rc = 0;
3837 	if (rc)
3838 		goto lseek_exit;
3839 
3840 	if (whence == SEEK_HOLE && out_data_len == 0)
3841 		goto lseek_exit;
3842 
3843 	if (whence == SEEK_DATA && out_data_len == 0) {
3844 		rc = -ENXIO;
3845 		goto lseek_exit;
3846 	}
3847 
3848 	if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3849 		rc = -EINVAL;
3850 		goto lseek_exit;
3851 	}
3852 	if (whence == SEEK_DATA) {
3853 		offset = le64_to_cpu(out_data->file_offset);
3854 		goto lseek_exit;
3855 	}
3856 	if (offset < le64_to_cpu(out_data->file_offset))
3857 		goto lseek_exit;
3858 
3859 	offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3860 
3861  lseek_exit:
3862 	free_xid(xid);
3863 	kfree(out_data);
3864 	if (!rc)
3865 		return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3866 	else
3867 		return rc;
3868 }
3869 
smb3_fiemap(struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct fiemap_extent_info * fei,u64 start,u64 len)3870 static int smb3_fiemap(struct cifs_tcon *tcon,
3871 		       struct cifsFileInfo *cfile,
3872 		       struct fiemap_extent_info *fei, u64 start, u64 len)
3873 {
3874 	unsigned int xid;
3875 	struct file_allocated_range_buffer in_data, *out_data;
3876 	u32 out_data_len;
3877 	int i, num, rc, flags, last_blob;
3878 	u64 next;
3879 
3880 	rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3881 	if (rc)
3882 		return rc;
3883 
3884 	xid = get_xid();
3885  again:
3886 	in_data.file_offset = cpu_to_le64(start);
3887 	in_data.length = cpu_to_le64(len);
3888 
3889 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3890 			cfile->fid.volatile_fid,
3891 			FSCTL_QUERY_ALLOCATED_RANGES,
3892 			(char *)&in_data, sizeof(in_data),
3893 			1024 * sizeof(struct file_allocated_range_buffer),
3894 			(char **)&out_data, &out_data_len);
3895 	if (rc == -E2BIG) {
3896 		last_blob = 0;
3897 		rc = 0;
3898 	} else
3899 		last_blob = 1;
3900 	if (rc)
3901 		goto out;
3902 
3903 	if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3904 		rc = -EINVAL;
3905 		goto out;
3906 	}
3907 	if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3908 		rc = -EINVAL;
3909 		goto out;
3910 	}
3911 
3912 	num = out_data_len / sizeof(struct file_allocated_range_buffer);
3913 	for (i = 0; i < num; i++) {
3914 		flags = 0;
3915 		if (i == num - 1 && last_blob)
3916 			flags |= FIEMAP_EXTENT_LAST;
3917 
3918 		rc = fiemap_fill_next_extent(fei,
3919 				le64_to_cpu(out_data[i].file_offset),
3920 				le64_to_cpu(out_data[i].file_offset),
3921 				le64_to_cpu(out_data[i].length),
3922 				flags);
3923 		if (rc < 0)
3924 			goto out;
3925 		if (rc == 1) {
3926 			rc = 0;
3927 			goto out;
3928 		}
3929 	}
3930 
3931 	if (!last_blob) {
3932 		next = le64_to_cpu(out_data[num - 1].file_offset) +
3933 		  le64_to_cpu(out_data[num - 1].length);
3934 		len = len - (next - start);
3935 		start = next;
3936 		goto again;
3937 	}
3938 
3939  out:
3940 	free_xid(xid);
3941 	kfree(out_data);
3942 	return rc;
3943 }
3944 
smb3_fallocate(struct file * file,struct cifs_tcon * tcon,int mode,loff_t off,loff_t len)3945 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3946 			   loff_t off, loff_t len)
3947 {
3948 	/* KEEP_SIZE already checked for by do_fallocate */
3949 	if (mode & FALLOC_FL_PUNCH_HOLE)
3950 		return smb3_punch_hole(file, tcon, off, len);
3951 	else if (mode & FALLOC_FL_ZERO_RANGE) {
3952 		if (mode & FALLOC_FL_KEEP_SIZE)
3953 			return smb3_zero_range(file, tcon, off, len, true);
3954 		return smb3_zero_range(file, tcon, off, len, false);
3955 	} else if (mode == FALLOC_FL_KEEP_SIZE)
3956 		return smb3_simple_falloc(file, tcon, off, len, true);
3957 	else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3958 		return smb3_collapse_range(file, tcon, off, len);
3959 	else if (mode == FALLOC_FL_INSERT_RANGE)
3960 		return smb3_insert_range(file, tcon, off, len);
3961 	else if (mode == 0)
3962 		return smb3_simple_falloc(file, tcon, off, len, false);
3963 
3964 	return -EOPNOTSUPP;
3965 }
3966 
3967 static void
smb2_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3968 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3969 		      struct cifsInodeInfo *cinode, __u32 oplock,
3970 		      unsigned int epoch, bool *purge_cache)
3971 {
3972 	server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3973 }
3974 
3975 static void
3976 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3977 		       unsigned int epoch, bool *purge_cache);
3978 
3979 static void
smb3_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3980 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3981 		       struct cifsInodeInfo *cinode, __u32 oplock,
3982 		       unsigned int epoch, bool *purge_cache)
3983 {
3984 	unsigned int old_state = cinode->oplock;
3985 	unsigned int old_epoch = cinode->epoch;
3986 	unsigned int new_state;
3987 
3988 	if (epoch > old_epoch) {
3989 		smb21_set_oplock_level(cinode, oplock, 0, NULL);
3990 		cinode->epoch = epoch;
3991 	}
3992 
3993 	new_state = cinode->oplock;
3994 	*purge_cache = false;
3995 
3996 	if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3997 	    (new_state & CIFS_CACHE_READ_FLG) == 0)
3998 		*purge_cache = true;
3999 	else if (old_state == new_state && (epoch - old_epoch > 1))
4000 		*purge_cache = true;
4001 }
4002 
4003 static void
smb2_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)4004 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4005 		      unsigned int epoch, bool *purge_cache)
4006 {
4007 	oplock &= 0xFF;
4008 	cinode->lease_granted = false;
4009 	if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4010 		return;
4011 	if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4012 		cinode->oplock = CIFS_CACHE_RHW_FLG;
4013 		cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4014 			 &cinode->netfs.inode);
4015 	} else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4016 		cinode->oplock = CIFS_CACHE_RW_FLG;
4017 		cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4018 			 &cinode->netfs.inode);
4019 	} else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4020 		cinode->oplock = CIFS_CACHE_READ_FLG;
4021 		cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4022 			 &cinode->netfs.inode);
4023 	} else
4024 		cinode->oplock = 0;
4025 }
4026 
4027 static void
smb21_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)4028 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4029 		       unsigned int epoch, bool *purge_cache)
4030 {
4031 	char message[5] = {0};
4032 	unsigned int new_oplock = 0;
4033 
4034 	oplock &= 0xFF;
4035 	cinode->lease_granted = true;
4036 	if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4037 		return;
4038 
4039 	/* Check if the server granted an oplock rather than a lease */
4040 	if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4041 		return smb2_set_oplock_level(cinode, oplock, epoch,
4042 					     purge_cache);
4043 
4044 	if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4045 		new_oplock |= CIFS_CACHE_READ_FLG;
4046 		strcat(message, "R");
4047 	}
4048 	if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4049 		new_oplock |= CIFS_CACHE_HANDLE_FLG;
4050 		strcat(message, "H");
4051 	}
4052 	if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4053 		new_oplock |= CIFS_CACHE_WRITE_FLG;
4054 		strcat(message, "W");
4055 	}
4056 	if (!new_oplock)
4057 		strncpy(message, "None", sizeof(message));
4058 
4059 	cinode->oplock = new_oplock;
4060 	cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4061 		 &cinode->netfs.inode);
4062 }
4063 
4064 static void
smb3_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)4065 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4066 		      unsigned int epoch, bool *purge_cache)
4067 {
4068 	unsigned int old_oplock = cinode->oplock;
4069 
4070 	smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4071 
4072 	if (purge_cache) {
4073 		*purge_cache = false;
4074 		if (old_oplock == CIFS_CACHE_READ_FLG) {
4075 			if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4076 			    (epoch - cinode->epoch > 0))
4077 				*purge_cache = true;
4078 			else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4079 				 (epoch - cinode->epoch > 1))
4080 				*purge_cache = true;
4081 			else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4082 				 (epoch - cinode->epoch > 1))
4083 				*purge_cache = true;
4084 			else if (cinode->oplock == 0 &&
4085 				 (epoch - cinode->epoch > 0))
4086 				*purge_cache = true;
4087 		} else if (old_oplock == CIFS_CACHE_RH_FLG) {
4088 			if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4089 			    (epoch - cinode->epoch > 0))
4090 				*purge_cache = true;
4091 			else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4092 				 (epoch - cinode->epoch > 1))
4093 				*purge_cache = true;
4094 		}
4095 		cinode->epoch = epoch;
4096 	}
4097 }
4098 
4099 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4100 static bool
smb2_is_read_op(__u32 oplock)4101 smb2_is_read_op(__u32 oplock)
4102 {
4103 	return oplock == SMB2_OPLOCK_LEVEL_II;
4104 }
4105 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4106 
4107 static bool
smb21_is_read_op(__u32 oplock)4108 smb21_is_read_op(__u32 oplock)
4109 {
4110 	return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4111 	       !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4112 }
4113 
4114 static __le32
map_oplock_to_lease(u8 oplock)4115 map_oplock_to_lease(u8 oplock)
4116 {
4117 	if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4118 		return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4119 	else if (oplock == SMB2_OPLOCK_LEVEL_II)
4120 		return SMB2_LEASE_READ_CACHING_LE;
4121 	else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4122 		return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4123 		       SMB2_LEASE_WRITE_CACHING_LE;
4124 	return 0;
4125 }
4126 
4127 static char *
smb2_create_lease_buf(u8 * lease_key,u8 oplock)4128 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4129 {
4130 	struct create_lease *buf;
4131 
4132 	buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4133 	if (!buf)
4134 		return NULL;
4135 
4136 	memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4137 	buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4138 
4139 	buf->ccontext.DataOffset = cpu_to_le16(offsetof
4140 					(struct create_lease, lcontext));
4141 	buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4142 	buf->ccontext.NameOffset = cpu_to_le16(offsetof
4143 				(struct create_lease, Name));
4144 	buf->ccontext.NameLength = cpu_to_le16(4);
4145 	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4146 	buf->Name[0] = 'R';
4147 	buf->Name[1] = 'q';
4148 	buf->Name[2] = 'L';
4149 	buf->Name[3] = 's';
4150 	return (char *)buf;
4151 }
4152 
4153 static char *
smb3_create_lease_buf(u8 * lease_key,u8 oplock)4154 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4155 {
4156 	struct create_lease_v2 *buf;
4157 
4158 	buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4159 	if (!buf)
4160 		return NULL;
4161 
4162 	memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4163 	buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4164 
4165 	buf->ccontext.DataOffset = cpu_to_le16(offsetof
4166 					(struct create_lease_v2, lcontext));
4167 	buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4168 	buf->ccontext.NameOffset = cpu_to_le16(offsetof
4169 				(struct create_lease_v2, Name));
4170 	buf->ccontext.NameLength = cpu_to_le16(4);
4171 	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4172 	buf->Name[0] = 'R';
4173 	buf->Name[1] = 'q';
4174 	buf->Name[2] = 'L';
4175 	buf->Name[3] = 's';
4176 	return (char *)buf;
4177 }
4178 
4179 static __u8
smb2_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4180 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4181 {
4182 	struct create_lease *lc = (struct create_lease *)buf;
4183 
4184 	*epoch = 0; /* not used */
4185 	if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4186 		return SMB2_OPLOCK_LEVEL_NOCHANGE;
4187 	return le32_to_cpu(lc->lcontext.LeaseState);
4188 }
4189 
4190 static __u8
smb3_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4191 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4192 {
4193 	struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4194 
4195 	*epoch = le16_to_cpu(lc->lcontext.Epoch);
4196 	if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4197 		return SMB2_OPLOCK_LEVEL_NOCHANGE;
4198 	if (lease_key)
4199 		memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4200 	return le32_to_cpu(lc->lcontext.LeaseState);
4201 }
4202 
4203 static unsigned int
smb2_wp_retry_size(struct inode * inode)4204 smb2_wp_retry_size(struct inode *inode)
4205 {
4206 	return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4207 		     SMB2_MAX_BUFFER_SIZE);
4208 }
4209 
4210 static bool
smb2_dir_needs_close(struct cifsFileInfo * cfile)4211 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4212 {
4213 	return !cfile->invalidHandle;
4214 }
4215 
4216 static void
fill_transform_hdr(struct smb2_transform_hdr * tr_hdr,unsigned int orig_len,struct smb_rqst * old_rq,__le16 cipher_type)4217 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4218 		   struct smb_rqst *old_rq, __le16 cipher_type)
4219 {
4220 	struct smb2_hdr *shdr =
4221 			(struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4222 
4223 	memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4224 	tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4225 	tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4226 	tr_hdr->Flags = cpu_to_le16(0x01);
4227 	if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4228 	    (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4229 		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4230 	else
4231 		get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4232 	memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4233 }
4234 
smb2_aead_req_alloc(struct crypto_aead * tfm,const struct smb_rqst * rqst,int num_rqst,const u8 * sig,u8 ** iv,struct aead_request ** req,struct sg_table * sgt,unsigned int * num_sgs,size_t * sensitive_size)4235 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4236 				 int num_rqst, const u8 *sig, u8 **iv,
4237 				 struct aead_request **req, struct sg_table *sgt,
4238 				 unsigned int *num_sgs, size_t *sensitive_size)
4239 {
4240 	unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4241 	unsigned int iv_size = crypto_aead_ivsize(tfm);
4242 	unsigned int len;
4243 	u8 *p;
4244 
4245 	*num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4246 	if (IS_ERR_VALUE((long)(int)*num_sgs))
4247 		return ERR_PTR(*num_sgs);
4248 
4249 	len = iv_size;
4250 	len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4251 	len = ALIGN(len, crypto_tfm_ctx_alignment());
4252 	len += req_size;
4253 	len = ALIGN(len, __alignof__(struct scatterlist));
4254 	len += array_size(*num_sgs, sizeof(struct scatterlist));
4255 	*sensitive_size = len;
4256 
4257 	p = kvzalloc(len, GFP_NOFS);
4258 	if (!p)
4259 		return ERR_PTR(-ENOMEM);
4260 
4261 	*iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4262 	*req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4263 						crypto_tfm_ctx_alignment());
4264 	sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4265 						   __alignof__(struct scatterlist));
4266 	return p;
4267 }
4268 
smb2_get_aead_req(struct crypto_aead * tfm,struct smb_rqst * rqst,int num_rqst,const u8 * sig,u8 ** iv,struct aead_request ** req,struct scatterlist ** sgl,size_t * sensitive_size)4269 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4270 			       int num_rqst, const u8 *sig, u8 **iv,
4271 			       struct aead_request **req, struct scatterlist **sgl,
4272 			       size_t *sensitive_size)
4273 {
4274 	struct sg_table sgtable = {};
4275 	unsigned int skip, num_sgs, i, j;
4276 	ssize_t rc;
4277 	void *p;
4278 
4279 	p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4280 				&num_sgs, sensitive_size);
4281 	if (IS_ERR(p))
4282 		return ERR_CAST(p);
4283 
4284 	sg_init_marker(sgtable.sgl, num_sgs);
4285 
4286 	/*
4287 	 * The first rqst has a transform header where the
4288 	 * first 20 bytes are not part of the encrypted blob.
4289 	 */
4290 	skip = 20;
4291 
4292 	for (i = 0; i < num_rqst; i++) {
4293 		struct iov_iter *iter = &rqst[i].rq_iter;
4294 		size_t count = iov_iter_count(iter);
4295 
4296 		for (j = 0; j < rqst[i].rq_nvec; j++) {
4297 			cifs_sg_set_buf(&sgtable,
4298 					rqst[i].rq_iov[j].iov_base + skip,
4299 					rqst[i].rq_iov[j].iov_len - skip);
4300 
4301 			/* See the above comment on the 'skip' assignment */
4302 			skip = 0;
4303 		}
4304 		sgtable.orig_nents = sgtable.nents;
4305 
4306 		rc = extract_iter_to_sg(iter, count, &sgtable,
4307 					num_sgs - sgtable.nents, 0);
4308 		iov_iter_revert(iter, rc);
4309 		sgtable.orig_nents = sgtable.nents;
4310 	}
4311 
4312 	cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4313 	sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4314 	*sgl = sgtable.sgl;
4315 	return p;
4316 }
4317 
4318 static int
smb2_get_enc_key(struct TCP_Server_Info * server,__u64 ses_id,int enc,u8 * key)4319 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4320 {
4321 	struct TCP_Server_Info *pserver;
4322 	struct cifs_ses *ses;
4323 	u8 *ses_enc_key;
4324 
4325 	/* If server is a channel, select the primary channel */
4326 	pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4327 
4328 	spin_lock(&cifs_tcp_ses_lock);
4329 	list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4330 		if (ses->Suid == ses_id) {
4331 			spin_lock(&ses->ses_lock);
4332 			ses_enc_key = enc ? ses->smb3encryptionkey :
4333 				ses->smb3decryptionkey;
4334 			memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4335 			spin_unlock(&ses->ses_lock);
4336 			spin_unlock(&cifs_tcp_ses_lock);
4337 			return 0;
4338 		}
4339 	}
4340 	spin_unlock(&cifs_tcp_ses_lock);
4341 
4342 	trace_smb3_ses_not_found(ses_id);
4343 
4344 	return -EAGAIN;
4345 }
4346 /*
4347  * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4348  * iov[0]   - transform header (associate data),
4349  * iov[1-N] - SMB2 header and pages - data to encrypt.
4350  * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4351  * untouched.
4352  */
4353 static int
crypt_message(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * rqst,int enc)4354 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4355 	      struct smb_rqst *rqst, int enc)
4356 {
4357 	struct smb2_transform_hdr *tr_hdr =
4358 		(struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4359 	unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4360 	int rc = 0;
4361 	struct scatterlist *sg;
4362 	u8 sign[SMB2_SIGNATURE_SIZE] = {};
4363 	u8 key[SMB3_ENC_DEC_KEY_SIZE];
4364 	struct aead_request *req;
4365 	u8 *iv;
4366 	DECLARE_CRYPTO_WAIT(wait);
4367 	struct crypto_aead *tfm;
4368 	unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4369 	void *creq;
4370 	size_t sensitive_size;
4371 
4372 	rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4373 	if (rc) {
4374 		cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4375 			 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4376 		return rc;
4377 	}
4378 
4379 	rc = smb3_crypto_aead_allocate(server);
4380 	if (rc) {
4381 		cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4382 		return rc;
4383 	}
4384 
4385 	tfm = enc ? server->secmech.enc : server->secmech.dec;
4386 
4387 	if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4388 		(server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4389 		rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4390 	else
4391 		rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4392 
4393 	if (rc) {
4394 		cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4395 		return rc;
4396 	}
4397 
4398 	rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4399 	if (rc) {
4400 		cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4401 		return rc;
4402 	}
4403 
4404 	creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4405 				 &sensitive_size);
4406 	if (IS_ERR(creq))
4407 		return PTR_ERR(creq);
4408 
4409 	if (!enc) {
4410 		memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4411 		crypt_len += SMB2_SIGNATURE_SIZE;
4412 	}
4413 
4414 	if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4415 	    (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4416 		memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4417 	else {
4418 		iv[0] = 3;
4419 		memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4420 	}
4421 
4422 	aead_request_set_tfm(req, tfm);
4423 	aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4424 	aead_request_set_ad(req, assoc_data_len);
4425 
4426 	aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4427 				  crypto_req_done, &wait);
4428 
4429 	rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4430 				: crypto_aead_decrypt(req), &wait);
4431 
4432 	if (!rc && enc)
4433 		memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4434 
4435 	kvfree_sensitive(creq, sensitive_size);
4436 	return rc;
4437 }
4438 
4439 /*
4440  * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4441  */
cifs_clear_xarray_buffer(struct xarray * buffer)4442 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4443 {
4444 	struct folio *folio;
4445 
4446 	XA_STATE(xas, buffer, 0);
4447 
4448 	rcu_read_lock();
4449 	xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4450 		folio_put(folio);
4451 	}
4452 	rcu_read_unlock();
4453 	xa_destroy(buffer);
4454 }
4455 
4456 void
smb3_free_compound_rqst(int num_rqst,struct smb_rqst * rqst)4457 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4458 {
4459 	int i;
4460 
4461 	for (i = 0; i < num_rqst; i++)
4462 		if (!xa_empty(&rqst[i].rq_buffer))
4463 			cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4464 }
4465 
4466 /*
4467  * This function will initialize new_rq and encrypt the content.
4468  * The first entry, new_rq[0], only contains a single iov which contains
4469  * a smb2_transform_hdr and is pre-allocated by the caller.
4470  * This function then populates new_rq[1+] with the content from olq_rq[0+].
4471  *
4472  * The end result is an array of smb_rqst structures where the first structure
4473  * only contains a single iov for the transform header which we then can pass
4474  * to crypt_message().
4475  *
4476  * new_rq[0].rq_iov[0] :  smb2_transform_hdr pre-allocated by the caller
4477  * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4478  */
4479 static int
smb3_init_transform_rq(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * new_rq,struct smb_rqst * old_rq)4480 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4481 		       struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4482 {
4483 	struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4484 	struct page *page;
4485 	unsigned int orig_len = 0;
4486 	int i, j;
4487 	int rc = -ENOMEM;
4488 
4489 	for (i = 1; i < num_rqst; i++) {
4490 		struct smb_rqst *old = &old_rq[i - 1];
4491 		struct smb_rqst *new = &new_rq[i];
4492 		struct xarray *buffer = &new->rq_buffer;
4493 		size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4494 
4495 		orig_len += smb_rqst_len(server, old);
4496 		new->rq_iov = old->rq_iov;
4497 		new->rq_nvec = old->rq_nvec;
4498 
4499 		xa_init(buffer);
4500 
4501 		if (size > 0) {
4502 			unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4503 
4504 			for (j = 0; j < npages; j++) {
4505 				void *o;
4506 
4507 				rc = -ENOMEM;
4508 				page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4509 				if (!page)
4510 					goto err_free;
4511 				page->index = j;
4512 				o = xa_store(buffer, j, page, GFP_KERNEL);
4513 				if (xa_is_err(o)) {
4514 					rc = xa_err(o);
4515 					put_page(page);
4516 					goto err_free;
4517 				}
4518 
4519 				xa_set_mark(buffer, j, XA_MARK_0);
4520 
4521 				seg = min_t(size_t, size - copied, PAGE_SIZE);
4522 				if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4523 					rc = -EFAULT;
4524 					goto err_free;
4525 				}
4526 				copied += seg;
4527 			}
4528 			iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4529 					buffer, 0, size);
4530 			new->rq_iter_size = size;
4531 		}
4532 	}
4533 
4534 	/* fill the 1st iov with a transform header */
4535 	fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4536 
4537 	rc = crypt_message(server, num_rqst, new_rq, 1);
4538 	cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4539 	if (rc)
4540 		goto err_free;
4541 
4542 	return rc;
4543 
4544 err_free:
4545 	smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4546 	return rc;
4547 }
4548 
4549 static int
smb3_is_transform_hdr(void * buf)4550 smb3_is_transform_hdr(void *buf)
4551 {
4552 	struct smb2_transform_hdr *trhdr = buf;
4553 
4554 	return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4555 }
4556 
4557 static int
decrypt_raw_data(struct TCP_Server_Info * server,char * buf,unsigned int buf_data_size,struct iov_iter * iter,bool is_offloaded)4558 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4559 		 unsigned int buf_data_size, struct iov_iter *iter,
4560 		 bool is_offloaded)
4561 {
4562 	struct kvec iov[2];
4563 	struct smb_rqst rqst = {NULL};
4564 	size_t iter_size = 0;
4565 	int rc;
4566 
4567 	iov[0].iov_base = buf;
4568 	iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4569 	iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4570 	iov[1].iov_len = buf_data_size;
4571 
4572 	rqst.rq_iov = iov;
4573 	rqst.rq_nvec = 2;
4574 	if (iter) {
4575 		rqst.rq_iter = *iter;
4576 		rqst.rq_iter_size = iov_iter_count(iter);
4577 		iter_size = iov_iter_count(iter);
4578 	}
4579 
4580 	rc = crypt_message(server, 1, &rqst, 0);
4581 	cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4582 
4583 	if (rc)
4584 		return rc;
4585 
4586 	memmove(buf, iov[1].iov_base, buf_data_size);
4587 
4588 	if (!is_offloaded)
4589 		server->total_read = buf_data_size + iter_size;
4590 
4591 	return rc;
4592 }
4593 
4594 static int
cifs_copy_pages_to_iter(struct xarray * pages,unsigned int data_size,unsigned int skip,struct iov_iter * iter)4595 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4596 			unsigned int skip, struct iov_iter *iter)
4597 {
4598 	struct page *page;
4599 	unsigned long index;
4600 
4601 	xa_for_each(pages, index, page) {
4602 		size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4603 
4604 		n = copy_page_to_iter(page, skip, len, iter);
4605 		if (n != len) {
4606 			cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4607 			return -EIO;
4608 		}
4609 		data_size -= n;
4610 		skip = 0;
4611 	}
4612 
4613 	return 0;
4614 }
4615 
4616 static int
handle_read_data(struct TCP_Server_Info * server,struct mid_q_entry * mid,char * buf,unsigned int buf_len,struct xarray * pages,unsigned int pages_len,bool is_offloaded)4617 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4618 		 char *buf, unsigned int buf_len, struct xarray *pages,
4619 		 unsigned int pages_len, bool is_offloaded)
4620 {
4621 	unsigned int data_offset;
4622 	unsigned int data_len;
4623 	unsigned int cur_off;
4624 	unsigned int cur_page_idx;
4625 	unsigned int pad_len;
4626 	struct cifs_readdata *rdata = mid->callback_data;
4627 	struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4628 	int length;
4629 	bool use_rdma_mr = false;
4630 
4631 	if (shdr->Command != SMB2_READ) {
4632 		cifs_server_dbg(VFS, "only big read responses are supported\n");
4633 		return -EOPNOTSUPP;
4634 	}
4635 
4636 	if (server->ops->is_session_expired &&
4637 	    server->ops->is_session_expired(buf)) {
4638 		if (!is_offloaded)
4639 			cifs_reconnect(server, true);
4640 		return -1;
4641 	}
4642 
4643 	if (server->ops->is_status_pending &&
4644 			server->ops->is_status_pending(buf, server))
4645 		return -1;
4646 
4647 	/* set up first two iov to get credits */
4648 	rdata->iov[0].iov_base = buf;
4649 	rdata->iov[0].iov_len = 0;
4650 	rdata->iov[1].iov_base = buf;
4651 	rdata->iov[1].iov_len =
4652 		min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4653 	cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4654 		 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4655 	cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4656 		 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4657 
4658 	rdata->result = server->ops->map_error(buf, true);
4659 	if (rdata->result != 0) {
4660 		cifs_dbg(FYI, "%s: server returned error %d\n",
4661 			 __func__, rdata->result);
4662 		/* normal error on read response */
4663 		if (is_offloaded)
4664 			mid->mid_state = MID_RESPONSE_RECEIVED;
4665 		else
4666 			dequeue_mid(mid, false);
4667 		return 0;
4668 	}
4669 
4670 	data_offset = server->ops->read_data_offset(buf);
4671 #ifdef CONFIG_CIFS_SMB_DIRECT
4672 	use_rdma_mr = rdata->mr;
4673 #endif
4674 	data_len = server->ops->read_data_length(buf, use_rdma_mr);
4675 
4676 	if (data_offset < server->vals->read_rsp_size) {
4677 		/*
4678 		 * win2k8 sometimes sends an offset of 0 when the read
4679 		 * is beyond the EOF. Treat it as if the data starts just after
4680 		 * the header.
4681 		 */
4682 		cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4683 			 __func__, data_offset);
4684 		data_offset = server->vals->read_rsp_size;
4685 	} else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4686 		/* data_offset is beyond the end of smallbuf */
4687 		cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4688 			 __func__, data_offset);
4689 		rdata->result = -EIO;
4690 		if (is_offloaded)
4691 			mid->mid_state = MID_RESPONSE_MALFORMED;
4692 		else
4693 			dequeue_mid(mid, rdata->result);
4694 		return 0;
4695 	}
4696 
4697 	pad_len = data_offset - server->vals->read_rsp_size;
4698 
4699 	if (buf_len <= data_offset) {
4700 		/* read response payload is in pages */
4701 		cur_page_idx = pad_len / PAGE_SIZE;
4702 		cur_off = pad_len % PAGE_SIZE;
4703 
4704 		if (cur_page_idx != 0) {
4705 			/* data offset is beyond the 1st page of response */
4706 			cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4707 				 __func__, data_offset);
4708 			rdata->result = -EIO;
4709 			if (is_offloaded)
4710 				mid->mid_state = MID_RESPONSE_MALFORMED;
4711 			else
4712 				dequeue_mid(mid, rdata->result);
4713 			return 0;
4714 		}
4715 
4716 		if (data_len > pages_len - pad_len) {
4717 			/* data_len is corrupt -- discard frame */
4718 			rdata->result = -EIO;
4719 			if (is_offloaded)
4720 				mid->mid_state = MID_RESPONSE_MALFORMED;
4721 			else
4722 				dequeue_mid(mid, rdata->result);
4723 			return 0;
4724 		}
4725 
4726 		/* Copy the data to the output I/O iterator. */
4727 		rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4728 							cur_off, &rdata->iter);
4729 		if (rdata->result != 0) {
4730 			if (is_offloaded)
4731 				mid->mid_state = MID_RESPONSE_MALFORMED;
4732 			else
4733 				dequeue_mid(mid, rdata->result);
4734 			return 0;
4735 		}
4736 		rdata->got_bytes = pages_len;
4737 
4738 	} else if (buf_len >= data_offset + data_len) {
4739 		/* read response payload is in buf */
4740 		WARN_ONCE(pages && !xa_empty(pages),
4741 			  "read data can be either in buf or in pages");
4742 		length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4743 		if (length < 0)
4744 			return length;
4745 		rdata->got_bytes = data_len;
4746 	} else {
4747 		/* read response payload cannot be in both buf and pages */
4748 		WARN_ONCE(1, "buf can not contain only a part of read data");
4749 		rdata->result = -EIO;
4750 		if (is_offloaded)
4751 			mid->mid_state = MID_RESPONSE_MALFORMED;
4752 		else
4753 			dequeue_mid(mid, rdata->result);
4754 		return 0;
4755 	}
4756 
4757 	if (is_offloaded)
4758 		mid->mid_state = MID_RESPONSE_RECEIVED;
4759 	else
4760 		dequeue_mid(mid, false);
4761 	return 0;
4762 }
4763 
4764 struct smb2_decrypt_work {
4765 	struct work_struct decrypt;
4766 	struct TCP_Server_Info *server;
4767 	struct xarray buffer;
4768 	char *buf;
4769 	unsigned int len;
4770 };
4771 
4772 
smb2_decrypt_offload(struct work_struct * work)4773 static void smb2_decrypt_offload(struct work_struct *work)
4774 {
4775 	struct smb2_decrypt_work *dw = container_of(work,
4776 				struct smb2_decrypt_work, decrypt);
4777 	int rc;
4778 	struct mid_q_entry *mid;
4779 	struct iov_iter iter;
4780 
4781 	iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4782 	rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4783 			      &iter, true);
4784 	if (rc) {
4785 		cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4786 		goto free_pages;
4787 	}
4788 
4789 	dw->server->lstrp = jiffies;
4790 	mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4791 	if (mid == NULL)
4792 		cifs_dbg(FYI, "mid not found\n");
4793 	else {
4794 		mid->decrypted = true;
4795 		rc = handle_read_data(dw->server, mid, dw->buf,
4796 				      dw->server->vals->read_rsp_size,
4797 				      &dw->buffer, dw->len,
4798 				      true);
4799 		if (rc >= 0) {
4800 #ifdef CONFIG_CIFS_STATS2
4801 			mid->when_received = jiffies;
4802 #endif
4803 			if (dw->server->ops->is_network_name_deleted)
4804 				dw->server->ops->is_network_name_deleted(dw->buf,
4805 									 dw->server);
4806 
4807 			mid->callback(mid);
4808 		} else {
4809 			spin_lock(&dw->server->srv_lock);
4810 			if (dw->server->tcpStatus == CifsNeedReconnect) {
4811 				spin_lock(&dw->server->mid_lock);
4812 				mid->mid_state = MID_RETRY_NEEDED;
4813 				spin_unlock(&dw->server->mid_lock);
4814 				spin_unlock(&dw->server->srv_lock);
4815 				mid->callback(mid);
4816 			} else {
4817 				spin_lock(&dw->server->mid_lock);
4818 				mid->mid_state = MID_REQUEST_SUBMITTED;
4819 				mid->mid_flags &= ~(MID_DELETED);
4820 				list_add_tail(&mid->qhead,
4821 					&dw->server->pending_mid_q);
4822 				spin_unlock(&dw->server->mid_lock);
4823 				spin_unlock(&dw->server->srv_lock);
4824 			}
4825 		}
4826 		release_mid(mid);
4827 	}
4828 
4829 free_pages:
4830 	cifs_clear_xarray_buffer(&dw->buffer);
4831 	cifs_small_buf_release(dw->buf);
4832 	kfree(dw);
4833 }
4834 
4835 
4836 static int
receive_encrypted_read(struct TCP_Server_Info * server,struct mid_q_entry ** mid,int * num_mids)4837 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4838 		       int *num_mids)
4839 {
4840 	struct page *page;
4841 	char *buf = server->smallbuf;
4842 	struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4843 	struct iov_iter iter;
4844 	unsigned int len, npages;
4845 	unsigned int buflen = server->pdu_size;
4846 	int rc;
4847 	int i = 0;
4848 	struct smb2_decrypt_work *dw;
4849 
4850 	dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4851 	if (!dw)
4852 		return -ENOMEM;
4853 	xa_init(&dw->buffer);
4854 	INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4855 	dw->server = server;
4856 
4857 	*num_mids = 1;
4858 	len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4859 		sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4860 
4861 	rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4862 	if (rc < 0)
4863 		goto free_dw;
4864 	server->total_read += rc;
4865 
4866 	len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4867 		server->vals->read_rsp_size;
4868 	dw->len = len;
4869 	npages = DIV_ROUND_UP(len, PAGE_SIZE);
4870 
4871 	rc = -ENOMEM;
4872 	for (; i < npages; i++) {
4873 		void *old;
4874 
4875 		page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4876 		if (!page)
4877 			goto discard_data;
4878 		page->index = i;
4879 		old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4880 		if (xa_is_err(old)) {
4881 			rc = xa_err(old);
4882 			put_page(page);
4883 			goto discard_data;
4884 		}
4885 		xa_set_mark(&dw->buffer, i, XA_MARK_0);
4886 	}
4887 
4888 	iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4889 
4890 	/* Read the data into the buffer and clear excess bufferage. */
4891 	rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4892 	if (rc < 0)
4893 		goto discard_data;
4894 
4895 	server->total_read += rc;
4896 	if (rc < npages * PAGE_SIZE)
4897 		iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4898 	iov_iter_revert(&iter, npages * PAGE_SIZE);
4899 	iov_iter_truncate(&iter, dw->len);
4900 
4901 	rc = cifs_discard_remaining_data(server);
4902 	if (rc)
4903 		goto free_pages;
4904 
4905 	/*
4906 	 * For large reads, offload to different thread for better performance,
4907 	 * use more cores decrypting which can be expensive
4908 	 */
4909 
4910 	if ((server->min_offload) && (server->in_flight > 1) &&
4911 	    (server->pdu_size >= server->min_offload)) {
4912 		dw->buf = server->smallbuf;
4913 		server->smallbuf = (char *)cifs_small_buf_get();
4914 
4915 		queue_work(decrypt_wq, &dw->decrypt);
4916 		*num_mids = 0; /* worker thread takes care of finding mid */
4917 		return -1;
4918 	}
4919 
4920 	rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4921 			      &iter, false);
4922 	if (rc)
4923 		goto free_pages;
4924 
4925 	*mid = smb2_find_mid(server, buf);
4926 	if (*mid == NULL) {
4927 		cifs_dbg(FYI, "mid not found\n");
4928 	} else {
4929 		cifs_dbg(FYI, "mid found\n");
4930 		(*mid)->decrypted = true;
4931 		rc = handle_read_data(server, *mid, buf,
4932 				      server->vals->read_rsp_size,
4933 				      &dw->buffer, dw->len, false);
4934 		if (rc >= 0) {
4935 			if (server->ops->is_network_name_deleted) {
4936 				server->ops->is_network_name_deleted(buf,
4937 								server);
4938 			}
4939 		}
4940 	}
4941 
4942 free_pages:
4943 	cifs_clear_xarray_buffer(&dw->buffer);
4944 free_dw:
4945 	kfree(dw);
4946 	return rc;
4947 discard_data:
4948 	cifs_discard_remaining_data(server);
4949 	goto free_pages;
4950 }
4951 
4952 static int
receive_encrypted_standard(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)4953 receive_encrypted_standard(struct TCP_Server_Info *server,
4954 			   struct mid_q_entry **mids, char **bufs,
4955 			   int *num_mids)
4956 {
4957 	int ret, length;
4958 	char *buf = server->smallbuf;
4959 	struct smb2_hdr *shdr;
4960 	unsigned int pdu_length = server->pdu_size;
4961 	unsigned int buf_size;
4962 	unsigned int next_cmd;
4963 	struct mid_q_entry *mid_entry;
4964 	int next_is_large;
4965 	char *next_buffer = NULL;
4966 
4967 	*num_mids = 0;
4968 
4969 	/* switch to large buffer if too big for a small one */
4970 	if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4971 		server->large_buf = true;
4972 		memcpy(server->bigbuf, buf, server->total_read);
4973 		buf = server->bigbuf;
4974 	}
4975 
4976 	/* now read the rest */
4977 	length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4978 				pdu_length - HEADER_SIZE(server) + 1);
4979 	if (length < 0)
4980 		return length;
4981 	server->total_read += length;
4982 
4983 	buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4984 	length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4985 	if (length)
4986 		return length;
4987 
4988 	next_is_large = server->large_buf;
4989 one_more:
4990 	shdr = (struct smb2_hdr *)buf;
4991 	next_cmd = le32_to_cpu(shdr->NextCommand);
4992 	if (next_cmd) {
4993 		if (WARN_ON_ONCE(next_cmd > pdu_length))
4994 			return -1;
4995 		if (next_is_large)
4996 			next_buffer = (char *)cifs_buf_get();
4997 		else
4998 			next_buffer = (char *)cifs_small_buf_get();
4999 		memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
5000 	}
5001 
5002 	mid_entry = smb2_find_mid(server, buf);
5003 	if (mid_entry == NULL)
5004 		cifs_dbg(FYI, "mid not found\n");
5005 	else {
5006 		cifs_dbg(FYI, "mid found\n");
5007 		mid_entry->decrypted = true;
5008 		mid_entry->resp_buf_size = server->pdu_size;
5009 	}
5010 
5011 	if (*num_mids >= MAX_COMPOUND) {
5012 		cifs_server_dbg(VFS, "too many PDUs in compound\n");
5013 		return -1;
5014 	}
5015 	bufs[*num_mids] = buf;
5016 	mids[(*num_mids)++] = mid_entry;
5017 
5018 	if (mid_entry && mid_entry->handle)
5019 		ret = mid_entry->handle(server, mid_entry);
5020 	else
5021 		ret = cifs_handle_standard(server, mid_entry);
5022 
5023 	if (ret == 0 && next_cmd) {
5024 		pdu_length -= next_cmd;
5025 		server->large_buf = next_is_large;
5026 		if (next_is_large)
5027 			server->bigbuf = buf = next_buffer;
5028 		else
5029 			server->smallbuf = buf = next_buffer;
5030 		goto one_more;
5031 	} else if (ret != 0) {
5032 		/*
5033 		 * ret != 0 here means that we didn't get to handle_mid() thus
5034 		 * server->smallbuf and server->bigbuf are still valid. We need
5035 		 * to free next_buffer because it is not going to be used
5036 		 * anywhere.
5037 		 */
5038 		if (next_is_large)
5039 			free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5040 		else
5041 			free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5042 	}
5043 
5044 	return ret;
5045 }
5046 
5047 static int
smb3_receive_transform(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)5048 smb3_receive_transform(struct TCP_Server_Info *server,
5049 		       struct mid_q_entry **mids, char **bufs, int *num_mids)
5050 {
5051 	char *buf = server->smallbuf;
5052 	unsigned int pdu_length = server->pdu_size;
5053 	struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5054 	unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5055 
5056 	if (pdu_length < sizeof(struct smb2_transform_hdr) +
5057 						sizeof(struct smb2_hdr)) {
5058 		cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5059 			 pdu_length);
5060 		cifs_reconnect(server, true);
5061 		return -ECONNABORTED;
5062 	}
5063 
5064 	if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5065 		cifs_server_dbg(VFS, "Transform message is broken\n");
5066 		cifs_reconnect(server, true);
5067 		return -ECONNABORTED;
5068 	}
5069 
5070 	/* TODO: add support for compounds containing READ. */
5071 	if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5072 		return receive_encrypted_read(server, &mids[0], num_mids);
5073 	}
5074 
5075 	return receive_encrypted_standard(server, mids, bufs, num_mids);
5076 }
5077 
5078 int
smb3_handle_read_data(struct TCP_Server_Info * server,struct mid_q_entry * mid)5079 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5080 {
5081 	char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5082 
5083 	return handle_read_data(server, mid, buf, server->pdu_size,
5084 				NULL, 0, false);
5085 }
5086 
smb2_next_header(struct TCP_Server_Info * server,char * buf,unsigned int * noff)5087 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
5088 			    unsigned int *noff)
5089 {
5090 	struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5091 	struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5092 
5093 	if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
5094 		*noff = le32_to_cpu(t_hdr->OriginalMessageSize);
5095 		if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
5096 			return -EINVAL;
5097 	} else {
5098 		*noff = le32_to_cpu(hdr->NextCommand);
5099 	}
5100 	if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
5101 		return -EINVAL;
5102 	return 0;
5103 }
5104 
5105 static int
smb2_make_node(unsigned int xid,struct inode * inode,struct dentry * dentry,struct cifs_tcon * tcon,const char * full_path,umode_t mode,dev_t dev)5106 smb2_make_node(unsigned int xid, struct inode *inode,
5107 	       struct dentry *dentry, struct cifs_tcon *tcon,
5108 	       const char *full_path, umode_t mode, dev_t dev)
5109 {
5110 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5111 	int rc = -EPERM;
5112 	struct cifs_open_info_data buf = {};
5113 	struct cifs_io_parms io_parms = {0};
5114 	__u32 oplock = 0;
5115 	struct cifs_fid fid;
5116 	struct cifs_open_parms oparms;
5117 	unsigned int bytes_written;
5118 	struct win_dev *pdev;
5119 	struct kvec iov[2];
5120 
5121 	/*
5122 	 * Check if mounted with mount parm 'sfu' mount parm.
5123 	 * SFU emulation should work with all servers, but only
5124 	 * supports block and char device (no socket & fifo),
5125 	 * and was used by default in earlier versions of Windows
5126 	 */
5127 	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5128 		return rc;
5129 
5130 	/*
5131 	 * TODO: Add ability to create instead via reparse point. Windows (e.g.
5132 	 * their current NFS server) uses this approach to expose special files
5133 	 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5134 	 */
5135 
5136 	if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5137 		return rc;
5138 
5139 	cifs_dbg(FYI, "sfu compat create special file\n");
5140 
5141 	oparms = (struct cifs_open_parms) {
5142 		.tcon = tcon,
5143 		.cifs_sb = cifs_sb,
5144 		.desired_access = GENERIC_WRITE,
5145 		.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5146 						      CREATE_OPTION_SPECIAL),
5147 		.disposition = FILE_CREATE,
5148 		.path = full_path,
5149 		.fid = &fid,
5150 	};
5151 
5152 	if (tcon->ses->server->oplocks)
5153 		oplock = REQ_OPLOCK;
5154 	else
5155 		oplock = 0;
5156 	rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5157 	if (rc)
5158 		return rc;
5159 
5160 	/*
5161 	 * BB Do not bother to decode buf since no local inode yet to put
5162 	 * timestamps in, but we can reuse it safely.
5163 	 */
5164 
5165 	pdev = (struct win_dev *)&buf.fi;
5166 	io_parms.pid = current->tgid;
5167 	io_parms.tcon = tcon;
5168 	io_parms.offset = 0;
5169 	io_parms.length = sizeof(struct win_dev);
5170 	iov[1].iov_base = &buf.fi;
5171 	iov[1].iov_len = sizeof(struct win_dev);
5172 	if (S_ISCHR(mode)) {
5173 		memcpy(pdev->type, "IntxCHR", 8);
5174 		pdev->major = cpu_to_le64(MAJOR(dev));
5175 		pdev->minor = cpu_to_le64(MINOR(dev));
5176 		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5177 							&bytes_written, iov, 1);
5178 	} else if (S_ISBLK(mode)) {
5179 		memcpy(pdev->type, "IntxBLK", 8);
5180 		pdev->major = cpu_to_le64(MAJOR(dev));
5181 		pdev->minor = cpu_to_le64(MINOR(dev));
5182 		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5183 							&bytes_written, iov, 1);
5184 	} else if (S_ISFIFO(mode)) {
5185 		memcpy(pdev->type, "LnxFIFO", 8);
5186 		pdev->major = 0;
5187 		pdev->minor = 0;
5188 		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5189 							&bytes_written, iov, 1);
5190 	}
5191 	tcon->ses->server->ops->close(xid, tcon, &fid);
5192 	d_drop(dentry);
5193 
5194 	/* FIXME: add code here to set EAs */
5195 
5196 	cifs_free_open_info(&buf);
5197 	return rc;
5198 }
5199 
5200 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5201 struct smb_version_operations smb20_operations = {
5202 	.compare_fids = smb2_compare_fids,
5203 	.setup_request = smb2_setup_request,
5204 	.setup_async_request = smb2_setup_async_request,
5205 	.check_receive = smb2_check_receive,
5206 	.add_credits = smb2_add_credits,
5207 	.set_credits = smb2_set_credits,
5208 	.get_credits_field = smb2_get_credits_field,
5209 	.get_credits = smb2_get_credits,
5210 	.wait_mtu_credits = cifs_wait_mtu_credits,
5211 	.get_next_mid = smb2_get_next_mid,
5212 	.revert_current_mid = smb2_revert_current_mid,
5213 	.read_data_offset = smb2_read_data_offset,
5214 	.read_data_length = smb2_read_data_length,
5215 	.map_error = map_smb2_to_linux_error,
5216 	.find_mid = smb2_find_mid,
5217 	.check_message = smb2_check_message,
5218 	.dump_detail = smb2_dump_detail,
5219 	.clear_stats = smb2_clear_stats,
5220 	.print_stats = smb2_print_stats,
5221 	.is_oplock_break = smb2_is_valid_oplock_break,
5222 	.handle_cancelled_mid = smb2_handle_cancelled_mid,
5223 	.downgrade_oplock = smb2_downgrade_oplock,
5224 	.need_neg = smb2_need_neg,
5225 	.negotiate = smb2_negotiate,
5226 	.negotiate_wsize = smb2_negotiate_wsize,
5227 	.negotiate_rsize = smb2_negotiate_rsize,
5228 	.sess_setup = SMB2_sess_setup,
5229 	.logoff = SMB2_logoff,
5230 	.tree_connect = SMB2_tcon,
5231 	.tree_disconnect = SMB2_tdis,
5232 	.qfs_tcon = smb2_qfs_tcon,
5233 	.is_path_accessible = smb2_is_path_accessible,
5234 	.can_echo = smb2_can_echo,
5235 	.echo = SMB2_echo,
5236 	.query_path_info = smb2_query_path_info,
5237 	.query_reparse_point = smb2_query_reparse_point,
5238 	.get_srv_inum = smb2_get_srv_inum,
5239 	.query_file_info = smb2_query_file_info,
5240 	.set_path_size = smb2_set_path_size,
5241 	.set_file_size = smb2_set_file_size,
5242 	.set_file_info = smb2_set_file_info,
5243 	.set_compression = smb2_set_compression,
5244 	.mkdir = smb2_mkdir,
5245 	.mkdir_setinfo = smb2_mkdir_setinfo,
5246 	.rmdir = smb2_rmdir,
5247 	.unlink = smb2_unlink,
5248 	.rename = smb2_rename_path,
5249 	.create_hardlink = smb2_create_hardlink,
5250 	.parse_reparse_point = smb2_parse_reparse_point,
5251 	.query_mf_symlink = smb3_query_mf_symlink,
5252 	.create_mf_symlink = smb3_create_mf_symlink,
5253 	.open = smb2_open_file,
5254 	.set_fid = smb2_set_fid,
5255 	.close = smb2_close_file,
5256 	.flush = smb2_flush_file,
5257 	.async_readv = smb2_async_readv,
5258 	.async_writev = smb2_async_writev,
5259 	.sync_read = smb2_sync_read,
5260 	.sync_write = smb2_sync_write,
5261 	.query_dir_first = smb2_query_dir_first,
5262 	.query_dir_next = smb2_query_dir_next,
5263 	.close_dir = smb2_close_dir,
5264 	.calc_smb_size = smb2_calc_size,
5265 	.is_status_pending = smb2_is_status_pending,
5266 	.is_session_expired = smb2_is_session_expired,
5267 	.oplock_response = smb2_oplock_response,
5268 	.queryfs = smb2_queryfs,
5269 	.mand_lock = smb2_mand_lock,
5270 	.mand_unlock_range = smb2_unlock_range,
5271 	.push_mand_locks = smb2_push_mandatory_locks,
5272 	.get_lease_key = smb2_get_lease_key,
5273 	.set_lease_key = smb2_set_lease_key,
5274 	.new_lease_key = smb2_new_lease_key,
5275 	.calc_signature = smb2_calc_signature,
5276 	.is_read_op = smb2_is_read_op,
5277 	.set_oplock_level = smb2_set_oplock_level,
5278 	.create_lease_buf = smb2_create_lease_buf,
5279 	.parse_lease_buf = smb2_parse_lease_buf,
5280 	.copychunk_range = smb2_copychunk_range,
5281 	.wp_retry_size = smb2_wp_retry_size,
5282 	.dir_needs_close = smb2_dir_needs_close,
5283 	.get_dfs_refer = smb2_get_dfs_refer,
5284 	.select_sectype = smb2_select_sectype,
5285 #ifdef CONFIG_CIFS_XATTR
5286 	.query_all_EAs = smb2_query_eas,
5287 	.set_EA = smb2_set_ea,
5288 #endif /* CIFS_XATTR */
5289 	.get_acl = get_smb2_acl,
5290 	.get_acl_by_fid = get_smb2_acl_by_fid,
5291 	.set_acl = set_smb2_acl,
5292 	.next_header = smb2_next_header,
5293 	.ioctl_query_info = smb2_ioctl_query_info,
5294 	.make_node = smb2_make_node,
5295 	.fiemap = smb3_fiemap,
5296 	.llseek = smb3_llseek,
5297 	.is_status_io_timeout = smb2_is_status_io_timeout,
5298 	.is_network_name_deleted = smb2_is_network_name_deleted,
5299 };
5300 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5301 
5302 struct smb_version_operations smb21_operations = {
5303 	.compare_fids = smb2_compare_fids,
5304 	.setup_request = smb2_setup_request,
5305 	.setup_async_request = smb2_setup_async_request,
5306 	.check_receive = smb2_check_receive,
5307 	.add_credits = smb2_add_credits,
5308 	.set_credits = smb2_set_credits,
5309 	.get_credits_field = smb2_get_credits_field,
5310 	.get_credits = smb2_get_credits,
5311 	.wait_mtu_credits = smb2_wait_mtu_credits,
5312 	.adjust_credits = smb2_adjust_credits,
5313 	.get_next_mid = smb2_get_next_mid,
5314 	.revert_current_mid = smb2_revert_current_mid,
5315 	.read_data_offset = smb2_read_data_offset,
5316 	.read_data_length = smb2_read_data_length,
5317 	.map_error = map_smb2_to_linux_error,
5318 	.find_mid = smb2_find_mid,
5319 	.check_message = smb2_check_message,
5320 	.dump_detail = smb2_dump_detail,
5321 	.clear_stats = smb2_clear_stats,
5322 	.print_stats = smb2_print_stats,
5323 	.is_oplock_break = smb2_is_valid_oplock_break,
5324 	.handle_cancelled_mid = smb2_handle_cancelled_mid,
5325 	.downgrade_oplock = smb2_downgrade_oplock,
5326 	.need_neg = smb2_need_neg,
5327 	.negotiate = smb2_negotiate,
5328 	.negotiate_wsize = smb2_negotiate_wsize,
5329 	.negotiate_rsize = smb2_negotiate_rsize,
5330 	.sess_setup = SMB2_sess_setup,
5331 	.logoff = SMB2_logoff,
5332 	.tree_connect = SMB2_tcon,
5333 	.tree_disconnect = SMB2_tdis,
5334 	.qfs_tcon = smb2_qfs_tcon,
5335 	.is_path_accessible = smb2_is_path_accessible,
5336 	.can_echo = smb2_can_echo,
5337 	.echo = SMB2_echo,
5338 	.query_path_info = smb2_query_path_info,
5339 	.query_reparse_point = smb2_query_reparse_point,
5340 	.get_srv_inum = smb2_get_srv_inum,
5341 	.query_file_info = smb2_query_file_info,
5342 	.set_path_size = smb2_set_path_size,
5343 	.set_file_size = smb2_set_file_size,
5344 	.set_file_info = smb2_set_file_info,
5345 	.set_compression = smb2_set_compression,
5346 	.mkdir = smb2_mkdir,
5347 	.mkdir_setinfo = smb2_mkdir_setinfo,
5348 	.rmdir = smb2_rmdir,
5349 	.unlink = smb2_unlink,
5350 	.rename = smb2_rename_path,
5351 	.create_hardlink = smb2_create_hardlink,
5352 	.parse_reparse_point = smb2_parse_reparse_point,
5353 	.query_mf_symlink = smb3_query_mf_symlink,
5354 	.create_mf_symlink = smb3_create_mf_symlink,
5355 	.open = smb2_open_file,
5356 	.set_fid = smb2_set_fid,
5357 	.close = smb2_close_file,
5358 	.flush = smb2_flush_file,
5359 	.async_readv = smb2_async_readv,
5360 	.async_writev = smb2_async_writev,
5361 	.sync_read = smb2_sync_read,
5362 	.sync_write = smb2_sync_write,
5363 	.query_dir_first = smb2_query_dir_first,
5364 	.query_dir_next = smb2_query_dir_next,
5365 	.close_dir = smb2_close_dir,
5366 	.calc_smb_size = smb2_calc_size,
5367 	.is_status_pending = smb2_is_status_pending,
5368 	.is_session_expired = smb2_is_session_expired,
5369 	.oplock_response = smb2_oplock_response,
5370 	.queryfs = smb2_queryfs,
5371 	.mand_lock = smb2_mand_lock,
5372 	.mand_unlock_range = smb2_unlock_range,
5373 	.push_mand_locks = smb2_push_mandatory_locks,
5374 	.get_lease_key = smb2_get_lease_key,
5375 	.set_lease_key = smb2_set_lease_key,
5376 	.new_lease_key = smb2_new_lease_key,
5377 	.calc_signature = smb2_calc_signature,
5378 	.is_read_op = smb21_is_read_op,
5379 	.set_oplock_level = smb21_set_oplock_level,
5380 	.create_lease_buf = smb2_create_lease_buf,
5381 	.parse_lease_buf = smb2_parse_lease_buf,
5382 	.copychunk_range = smb2_copychunk_range,
5383 	.wp_retry_size = smb2_wp_retry_size,
5384 	.dir_needs_close = smb2_dir_needs_close,
5385 	.enum_snapshots = smb3_enum_snapshots,
5386 	.notify = smb3_notify,
5387 	.get_dfs_refer = smb2_get_dfs_refer,
5388 	.select_sectype = smb2_select_sectype,
5389 #ifdef CONFIG_CIFS_XATTR
5390 	.query_all_EAs = smb2_query_eas,
5391 	.set_EA = smb2_set_ea,
5392 #endif /* CIFS_XATTR */
5393 	.get_acl = get_smb2_acl,
5394 	.get_acl_by_fid = get_smb2_acl_by_fid,
5395 	.set_acl = set_smb2_acl,
5396 	.next_header = smb2_next_header,
5397 	.ioctl_query_info = smb2_ioctl_query_info,
5398 	.make_node = smb2_make_node,
5399 	.fiemap = smb3_fiemap,
5400 	.llseek = smb3_llseek,
5401 	.is_status_io_timeout = smb2_is_status_io_timeout,
5402 	.is_network_name_deleted = smb2_is_network_name_deleted,
5403 };
5404 
5405 struct smb_version_operations smb30_operations = {
5406 	.compare_fids = smb2_compare_fids,
5407 	.setup_request = smb2_setup_request,
5408 	.setup_async_request = smb2_setup_async_request,
5409 	.check_receive = smb2_check_receive,
5410 	.add_credits = smb2_add_credits,
5411 	.set_credits = smb2_set_credits,
5412 	.get_credits_field = smb2_get_credits_field,
5413 	.get_credits = smb2_get_credits,
5414 	.wait_mtu_credits = smb2_wait_mtu_credits,
5415 	.adjust_credits = smb2_adjust_credits,
5416 	.get_next_mid = smb2_get_next_mid,
5417 	.revert_current_mid = smb2_revert_current_mid,
5418 	.read_data_offset = smb2_read_data_offset,
5419 	.read_data_length = smb2_read_data_length,
5420 	.map_error = map_smb2_to_linux_error,
5421 	.find_mid = smb2_find_mid,
5422 	.check_message = smb2_check_message,
5423 	.dump_detail = smb2_dump_detail,
5424 	.clear_stats = smb2_clear_stats,
5425 	.print_stats = smb2_print_stats,
5426 	.dump_share_caps = smb2_dump_share_caps,
5427 	.is_oplock_break = smb2_is_valid_oplock_break,
5428 	.handle_cancelled_mid = smb2_handle_cancelled_mid,
5429 	.downgrade_oplock = smb3_downgrade_oplock,
5430 	.need_neg = smb2_need_neg,
5431 	.negotiate = smb2_negotiate,
5432 	.negotiate_wsize = smb3_negotiate_wsize,
5433 	.negotiate_rsize = smb3_negotiate_rsize,
5434 	.sess_setup = SMB2_sess_setup,
5435 	.logoff = SMB2_logoff,
5436 	.tree_connect = SMB2_tcon,
5437 	.tree_disconnect = SMB2_tdis,
5438 	.qfs_tcon = smb3_qfs_tcon,
5439 	.is_path_accessible = smb2_is_path_accessible,
5440 	.can_echo = smb2_can_echo,
5441 	.echo = SMB2_echo,
5442 	.query_path_info = smb2_query_path_info,
5443 	/* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5444 	.query_reparse_point = smb2_query_reparse_point,
5445 	.get_srv_inum = smb2_get_srv_inum,
5446 	.query_file_info = smb2_query_file_info,
5447 	.set_path_size = smb2_set_path_size,
5448 	.set_file_size = smb2_set_file_size,
5449 	.set_file_info = smb2_set_file_info,
5450 	.set_compression = smb2_set_compression,
5451 	.mkdir = smb2_mkdir,
5452 	.mkdir_setinfo = smb2_mkdir_setinfo,
5453 	.rmdir = smb2_rmdir,
5454 	.unlink = smb2_unlink,
5455 	.rename = smb2_rename_path,
5456 	.create_hardlink = smb2_create_hardlink,
5457 	.parse_reparse_point = smb2_parse_reparse_point,
5458 	.query_mf_symlink = smb3_query_mf_symlink,
5459 	.create_mf_symlink = smb3_create_mf_symlink,
5460 	.open = smb2_open_file,
5461 	.set_fid = smb2_set_fid,
5462 	.close = smb2_close_file,
5463 	.close_getattr = smb2_close_getattr,
5464 	.flush = smb2_flush_file,
5465 	.async_readv = smb2_async_readv,
5466 	.async_writev = smb2_async_writev,
5467 	.sync_read = smb2_sync_read,
5468 	.sync_write = smb2_sync_write,
5469 	.query_dir_first = smb2_query_dir_first,
5470 	.query_dir_next = smb2_query_dir_next,
5471 	.close_dir = smb2_close_dir,
5472 	.calc_smb_size = smb2_calc_size,
5473 	.is_status_pending = smb2_is_status_pending,
5474 	.is_session_expired = smb2_is_session_expired,
5475 	.oplock_response = smb2_oplock_response,
5476 	.queryfs = smb2_queryfs,
5477 	.mand_lock = smb2_mand_lock,
5478 	.mand_unlock_range = smb2_unlock_range,
5479 	.push_mand_locks = smb2_push_mandatory_locks,
5480 	.get_lease_key = smb2_get_lease_key,
5481 	.set_lease_key = smb2_set_lease_key,
5482 	.new_lease_key = smb2_new_lease_key,
5483 	.generate_signingkey = generate_smb30signingkey,
5484 	.calc_signature = smb3_calc_signature,
5485 	.set_integrity  = smb3_set_integrity,
5486 	.is_read_op = smb21_is_read_op,
5487 	.set_oplock_level = smb3_set_oplock_level,
5488 	.create_lease_buf = smb3_create_lease_buf,
5489 	.parse_lease_buf = smb3_parse_lease_buf,
5490 	.copychunk_range = smb2_copychunk_range,
5491 	.duplicate_extents = smb2_duplicate_extents,
5492 	.validate_negotiate = smb3_validate_negotiate,
5493 	.wp_retry_size = smb2_wp_retry_size,
5494 	.dir_needs_close = smb2_dir_needs_close,
5495 	.fallocate = smb3_fallocate,
5496 	.enum_snapshots = smb3_enum_snapshots,
5497 	.notify = smb3_notify,
5498 	.init_transform_rq = smb3_init_transform_rq,
5499 	.is_transform_hdr = smb3_is_transform_hdr,
5500 	.receive_transform = smb3_receive_transform,
5501 	.get_dfs_refer = smb2_get_dfs_refer,
5502 	.select_sectype = smb2_select_sectype,
5503 #ifdef CONFIG_CIFS_XATTR
5504 	.query_all_EAs = smb2_query_eas,
5505 	.set_EA = smb2_set_ea,
5506 #endif /* CIFS_XATTR */
5507 	.get_acl = get_smb2_acl,
5508 	.get_acl_by_fid = get_smb2_acl_by_fid,
5509 	.set_acl = set_smb2_acl,
5510 	.next_header = smb2_next_header,
5511 	.ioctl_query_info = smb2_ioctl_query_info,
5512 	.make_node = smb2_make_node,
5513 	.fiemap = smb3_fiemap,
5514 	.llseek = smb3_llseek,
5515 	.is_status_io_timeout = smb2_is_status_io_timeout,
5516 	.is_network_name_deleted = smb2_is_network_name_deleted,
5517 };
5518 
5519 struct smb_version_operations smb311_operations = {
5520 	.compare_fids = smb2_compare_fids,
5521 	.setup_request = smb2_setup_request,
5522 	.setup_async_request = smb2_setup_async_request,
5523 	.check_receive = smb2_check_receive,
5524 	.add_credits = smb2_add_credits,
5525 	.set_credits = smb2_set_credits,
5526 	.get_credits_field = smb2_get_credits_field,
5527 	.get_credits = smb2_get_credits,
5528 	.wait_mtu_credits = smb2_wait_mtu_credits,
5529 	.adjust_credits = smb2_adjust_credits,
5530 	.get_next_mid = smb2_get_next_mid,
5531 	.revert_current_mid = smb2_revert_current_mid,
5532 	.read_data_offset = smb2_read_data_offset,
5533 	.read_data_length = smb2_read_data_length,
5534 	.map_error = map_smb2_to_linux_error,
5535 	.find_mid = smb2_find_mid,
5536 	.check_message = smb2_check_message,
5537 	.dump_detail = smb2_dump_detail,
5538 	.clear_stats = smb2_clear_stats,
5539 	.print_stats = smb2_print_stats,
5540 	.dump_share_caps = smb2_dump_share_caps,
5541 	.is_oplock_break = smb2_is_valid_oplock_break,
5542 	.handle_cancelled_mid = smb2_handle_cancelled_mid,
5543 	.downgrade_oplock = smb3_downgrade_oplock,
5544 	.need_neg = smb2_need_neg,
5545 	.negotiate = smb2_negotiate,
5546 	.negotiate_wsize = smb3_negotiate_wsize,
5547 	.negotiate_rsize = smb3_negotiate_rsize,
5548 	.sess_setup = SMB2_sess_setup,
5549 	.logoff = SMB2_logoff,
5550 	.tree_connect = SMB2_tcon,
5551 	.tree_disconnect = SMB2_tdis,
5552 	.qfs_tcon = smb3_qfs_tcon,
5553 	.is_path_accessible = smb2_is_path_accessible,
5554 	.can_echo = smb2_can_echo,
5555 	.echo = SMB2_echo,
5556 	.query_path_info = smb2_query_path_info,
5557 	.query_reparse_point = smb2_query_reparse_point,
5558 	.get_srv_inum = smb2_get_srv_inum,
5559 	.query_file_info = smb2_query_file_info,
5560 	.set_path_size = smb2_set_path_size,
5561 	.set_file_size = smb2_set_file_size,
5562 	.set_file_info = smb2_set_file_info,
5563 	.set_compression = smb2_set_compression,
5564 	.mkdir = smb2_mkdir,
5565 	.mkdir_setinfo = smb2_mkdir_setinfo,
5566 	.posix_mkdir = smb311_posix_mkdir,
5567 	.rmdir = smb2_rmdir,
5568 	.unlink = smb2_unlink,
5569 	.rename = smb2_rename_path,
5570 	.create_hardlink = smb2_create_hardlink,
5571 	.parse_reparse_point = smb2_parse_reparse_point,
5572 	.query_mf_symlink = smb3_query_mf_symlink,
5573 	.create_mf_symlink = smb3_create_mf_symlink,
5574 	.open = smb2_open_file,
5575 	.set_fid = smb2_set_fid,
5576 	.close = smb2_close_file,
5577 	.close_getattr = smb2_close_getattr,
5578 	.flush = smb2_flush_file,
5579 	.async_readv = smb2_async_readv,
5580 	.async_writev = smb2_async_writev,
5581 	.sync_read = smb2_sync_read,
5582 	.sync_write = smb2_sync_write,
5583 	.query_dir_first = smb2_query_dir_first,
5584 	.query_dir_next = smb2_query_dir_next,
5585 	.close_dir = smb2_close_dir,
5586 	.calc_smb_size = smb2_calc_size,
5587 	.is_status_pending = smb2_is_status_pending,
5588 	.is_session_expired = smb2_is_session_expired,
5589 	.oplock_response = smb2_oplock_response,
5590 	.queryfs = smb311_queryfs,
5591 	.mand_lock = smb2_mand_lock,
5592 	.mand_unlock_range = smb2_unlock_range,
5593 	.push_mand_locks = smb2_push_mandatory_locks,
5594 	.get_lease_key = smb2_get_lease_key,
5595 	.set_lease_key = smb2_set_lease_key,
5596 	.new_lease_key = smb2_new_lease_key,
5597 	.generate_signingkey = generate_smb311signingkey,
5598 	.calc_signature = smb3_calc_signature,
5599 	.set_integrity  = smb3_set_integrity,
5600 	.is_read_op = smb21_is_read_op,
5601 	.set_oplock_level = smb3_set_oplock_level,
5602 	.create_lease_buf = smb3_create_lease_buf,
5603 	.parse_lease_buf = smb3_parse_lease_buf,
5604 	.copychunk_range = smb2_copychunk_range,
5605 	.duplicate_extents = smb2_duplicate_extents,
5606 /*	.validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5607 	.wp_retry_size = smb2_wp_retry_size,
5608 	.dir_needs_close = smb2_dir_needs_close,
5609 	.fallocate = smb3_fallocate,
5610 	.enum_snapshots = smb3_enum_snapshots,
5611 	.notify = smb3_notify,
5612 	.init_transform_rq = smb3_init_transform_rq,
5613 	.is_transform_hdr = smb3_is_transform_hdr,
5614 	.receive_transform = smb3_receive_transform,
5615 	.get_dfs_refer = smb2_get_dfs_refer,
5616 	.select_sectype = smb2_select_sectype,
5617 #ifdef CONFIG_CIFS_XATTR
5618 	.query_all_EAs = smb2_query_eas,
5619 	.set_EA = smb2_set_ea,
5620 #endif /* CIFS_XATTR */
5621 	.get_acl = get_smb2_acl,
5622 	.get_acl_by_fid = get_smb2_acl_by_fid,
5623 	.set_acl = set_smb2_acl,
5624 	.next_header = smb2_next_header,
5625 	.ioctl_query_info = smb2_ioctl_query_info,
5626 	.make_node = smb2_make_node,
5627 	.fiemap = smb3_fiemap,
5628 	.llseek = smb3_llseek,
5629 	.is_status_io_timeout = smb2_is_status_io_timeout,
5630 	.is_network_name_deleted = smb2_is_network_name_deleted,
5631 };
5632 
5633 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5634 struct smb_version_values smb20_values = {
5635 	.version_string = SMB20_VERSION_STRING,
5636 	.protocol_id = SMB20_PROT_ID,
5637 	.req_capabilities = 0, /* MBZ */
5638 	.large_lock_type = 0,
5639 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5640 	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5641 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5642 	.header_size = sizeof(struct smb2_hdr),
5643 	.header_preamble_size = 0,
5644 	.max_header_size = MAX_SMB2_HDR_SIZE,
5645 	.read_rsp_size = sizeof(struct smb2_read_rsp),
5646 	.lock_cmd = SMB2_LOCK,
5647 	.cap_unix = 0,
5648 	.cap_nt_find = SMB2_NT_FIND,
5649 	.cap_large_files = SMB2_LARGE_FILES,
5650 	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5651 	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5652 	.create_lease_size = sizeof(struct create_lease),
5653 };
5654 #endif /* ALLOW_INSECURE_LEGACY */
5655 
5656 struct smb_version_values smb21_values = {
5657 	.version_string = SMB21_VERSION_STRING,
5658 	.protocol_id = SMB21_PROT_ID,
5659 	.req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5660 	.large_lock_type = 0,
5661 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5662 	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5663 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5664 	.header_size = sizeof(struct smb2_hdr),
5665 	.header_preamble_size = 0,
5666 	.max_header_size = MAX_SMB2_HDR_SIZE,
5667 	.read_rsp_size = sizeof(struct smb2_read_rsp),
5668 	.lock_cmd = SMB2_LOCK,
5669 	.cap_unix = 0,
5670 	.cap_nt_find = SMB2_NT_FIND,
5671 	.cap_large_files = SMB2_LARGE_FILES,
5672 	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5673 	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5674 	.create_lease_size = sizeof(struct create_lease),
5675 };
5676 
5677 struct smb_version_values smb3any_values = {
5678 	.version_string = SMB3ANY_VERSION_STRING,
5679 	.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5680 	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5681 	.large_lock_type = 0,
5682 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5683 	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5684 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5685 	.header_size = sizeof(struct smb2_hdr),
5686 	.header_preamble_size = 0,
5687 	.max_header_size = MAX_SMB2_HDR_SIZE,
5688 	.read_rsp_size = sizeof(struct smb2_read_rsp),
5689 	.lock_cmd = SMB2_LOCK,
5690 	.cap_unix = 0,
5691 	.cap_nt_find = SMB2_NT_FIND,
5692 	.cap_large_files = SMB2_LARGE_FILES,
5693 	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5694 	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5695 	.create_lease_size = sizeof(struct create_lease_v2),
5696 };
5697 
5698 struct smb_version_values smbdefault_values = {
5699 	.version_string = SMBDEFAULT_VERSION_STRING,
5700 	.protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5701 	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5702 	.large_lock_type = 0,
5703 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5704 	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5705 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5706 	.header_size = sizeof(struct smb2_hdr),
5707 	.header_preamble_size = 0,
5708 	.max_header_size = MAX_SMB2_HDR_SIZE,
5709 	.read_rsp_size = sizeof(struct smb2_read_rsp),
5710 	.lock_cmd = SMB2_LOCK,
5711 	.cap_unix = 0,
5712 	.cap_nt_find = SMB2_NT_FIND,
5713 	.cap_large_files = SMB2_LARGE_FILES,
5714 	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5715 	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5716 	.create_lease_size = sizeof(struct create_lease_v2),
5717 };
5718 
5719 struct smb_version_values smb30_values = {
5720 	.version_string = SMB30_VERSION_STRING,
5721 	.protocol_id = SMB30_PROT_ID,
5722 	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5723 	.large_lock_type = 0,
5724 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5725 	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5726 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5727 	.header_size = sizeof(struct smb2_hdr),
5728 	.header_preamble_size = 0,
5729 	.max_header_size = MAX_SMB2_HDR_SIZE,
5730 	.read_rsp_size = sizeof(struct smb2_read_rsp),
5731 	.lock_cmd = SMB2_LOCK,
5732 	.cap_unix = 0,
5733 	.cap_nt_find = SMB2_NT_FIND,
5734 	.cap_large_files = SMB2_LARGE_FILES,
5735 	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5736 	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5737 	.create_lease_size = sizeof(struct create_lease_v2),
5738 };
5739 
5740 struct smb_version_values smb302_values = {
5741 	.version_string = SMB302_VERSION_STRING,
5742 	.protocol_id = SMB302_PROT_ID,
5743 	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5744 	.large_lock_type = 0,
5745 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5746 	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5747 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5748 	.header_size = sizeof(struct smb2_hdr),
5749 	.header_preamble_size = 0,
5750 	.max_header_size = MAX_SMB2_HDR_SIZE,
5751 	.read_rsp_size = sizeof(struct smb2_read_rsp),
5752 	.lock_cmd = SMB2_LOCK,
5753 	.cap_unix = 0,
5754 	.cap_nt_find = SMB2_NT_FIND,
5755 	.cap_large_files = SMB2_LARGE_FILES,
5756 	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5757 	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5758 	.create_lease_size = sizeof(struct create_lease_v2),
5759 };
5760 
5761 struct smb_version_values smb311_values = {
5762 	.version_string = SMB311_VERSION_STRING,
5763 	.protocol_id = SMB311_PROT_ID,
5764 	.req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING,
5765 	.large_lock_type = 0,
5766 	.exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5767 	.shared_lock_type = SMB2_LOCKFLAG_SHARED,
5768 	.unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5769 	.header_size = sizeof(struct smb2_hdr),
5770 	.header_preamble_size = 0,
5771 	.max_header_size = MAX_SMB2_HDR_SIZE,
5772 	.read_rsp_size = sizeof(struct smb2_read_rsp),
5773 	.lock_cmd = SMB2_LOCK,
5774 	.cap_unix = 0,
5775 	.cap_nt_find = SMB2_NT_FIND,
5776 	.cap_large_files = SMB2_LARGE_FILES,
5777 	.signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5778 	.signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5779 	.create_lease_size = sizeof(struct create_lease_v2),
5780 };
5781