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 #include "reparse.h"
32
33 /* Change credits for different ops and return the total number of credits */
34 static int
change_conf(struct TCP_Server_Info * server)35 change_conf(struct TCP_Server_Info *server)
36 {
37 server->credits += server->echo_credits + server->oplock_credits;
38 if (server->credits > server->max_credits)
39 server->credits = server->max_credits;
40 server->oplock_credits = server->echo_credits = 0;
41 switch (server->credits) {
42 case 0:
43 return 0;
44 case 1:
45 server->echoes = false;
46 server->oplocks = false;
47 break;
48 case 2:
49 server->echoes = true;
50 server->oplocks = false;
51 server->echo_credits = 1;
52 break;
53 default:
54 server->echoes = true;
55 if (enable_oplocks) {
56 server->oplocks = true;
57 server->oplock_credits = 1;
58 } else
59 server->oplocks = false;
60
61 server->echo_credits = 1;
62 }
63 server->credits -= server->echo_credits + server->oplock_credits;
64 return server->credits + server->echo_credits + server->oplock_credits;
65 }
66
67 static void
smb2_add_credits(struct TCP_Server_Info * server,const struct cifs_credits * credits,const int optype)68 smb2_add_credits(struct TCP_Server_Info *server,
69 const struct cifs_credits *credits, const int optype)
70 {
71 int *val, rc = -1;
72 int scredits, in_flight;
73 unsigned int add = credits->value;
74 unsigned int instance = credits->instance;
75 bool reconnect_detected = false;
76 bool reconnect_with_invalid_credits = false;
77
78 spin_lock(&server->req_lock);
79 val = server->ops->get_credits_field(server, optype);
80
81 /* eg found case where write overlapping reconnect messed up credits */
82 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
83 reconnect_with_invalid_credits = true;
84
85 if ((instance == 0) || (instance == server->reconnect_instance))
86 *val += add;
87 else
88 reconnect_detected = true;
89
90 if (*val > 65000) {
91 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
92 pr_warn_once("server overflowed SMB3 credits\n");
93 trace_smb3_overflow_credits(server->CurrentMid,
94 server->conn_id, server->hostname, *val,
95 add, server->in_flight);
96 }
97 WARN_ON_ONCE(server->in_flight == 0);
98 server->in_flight--;
99 if (server->in_flight == 0 &&
100 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
101 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
102 rc = change_conf(server);
103 /*
104 * Sometimes server returns 0 credits on oplock break ack - we need to
105 * rebalance credits in this case.
106 */
107 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
108 server->oplocks) {
109 if (server->credits > 1) {
110 server->credits--;
111 server->oplock_credits++;
112 }
113 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
114 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
115 /* if now have too many oplock credits, rebalance so don't starve normal ops */
116 change_conf(server);
117
118 scredits = *val;
119 in_flight = server->in_flight;
120 spin_unlock(&server->req_lock);
121 wake_up(&server->request_q);
122
123 if (reconnect_detected) {
124 trace_smb3_reconnect_detected(server->CurrentMid,
125 server->conn_id, server->hostname, scredits, add, in_flight);
126
127 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
128 add, instance);
129 }
130
131 if (reconnect_with_invalid_credits) {
132 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
133 server->conn_id, server->hostname, scredits, add, in_flight);
134 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
135 optype, scredits, add);
136 }
137
138 spin_lock(&server->srv_lock);
139 if (server->tcpStatus == CifsNeedReconnect
140 || server->tcpStatus == CifsExiting) {
141 spin_unlock(&server->srv_lock);
142 return;
143 }
144 spin_unlock(&server->srv_lock);
145
146 switch (rc) {
147 case -1:
148 /* change_conf hasn't been executed */
149 break;
150 case 0:
151 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
152 break;
153 case 1:
154 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
155 break;
156 case 2:
157 cifs_dbg(FYI, "disabling oplocks\n");
158 break;
159 default:
160 /* change_conf rebalanced credits for different types */
161 break;
162 }
163
164 trace_smb3_add_credits(server->CurrentMid,
165 server->conn_id, server->hostname, scredits, add, in_flight);
166 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
167 }
168
169 static void
smb2_set_credits(struct TCP_Server_Info * server,const int val)170 smb2_set_credits(struct TCP_Server_Info *server, const int val)
171 {
172 int scredits, in_flight;
173
174 spin_lock(&server->req_lock);
175 server->credits = val;
176 if (val == 1) {
177 server->reconnect_instance++;
178 /*
179 * ChannelSequence updated for all channels in primary channel so that consistent
180 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
181 */
182 if (SERVER_IS_CHAN(server))
183 server->primary_server->channel_sequence_num++;
184 else
185 server->channel_sequence_num++;
186 }
187 scredits = server->credits;
188 in_flight = server->in_flight;
189 spin_unlock(&server->req_lock);
190
191 trace_smb3_set_credits(server->CurrentMid,
192 server->conn_id, server->hostname, scredits, val, in_flight);
193 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
194
195 /* don't log while holding the lock */
196 if (val == 1)
197 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
198 }
199
200 static int *
smb2_get_credits_field(struct TCP_Server_Info * server,const int optype)201 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
202 {
203 switch (optype) {
204 case CIFS_ECHO_OP:
205 return &server->echo_credits;
206 case CIFS_OBREAK_OP:
207 return &server->oplock_credits;
208 default:
209 return &server->credits;
210 }
211 }
212
213 static unsigned int
smb2_get_credits(struct mid_q_entry * mid)214 smb2_get_credits(struct mid_q_entry *mid)
215 {
216 return mid->credits_received;
217 }
218
219 static int
smb2_wait_mtu_credits(struct TCP_Server_Info * server,unsigned int size,unsigned int * num,struct cifs_credits * credits)220 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
221 unsigned int *num, struct cifs_credits *credits)
222 {
223 int rc = 0;
224 unsigned int scredits, in_flight;
225
226 spin_lock(&server->req_lock);
227 while (1) {
228 spin_unlock(&server->req_lock);
229
230 spin_lock(&server->srv_lock);
231 if (server->tcpStatus == CifsExiting) {
232 spin_unlock(&server->srv_lock);
233 return -ENOENT;
234 }
235 spin_unlock(&server->srv_lock);
236
237 spin_lock(&server->req_lock);
238 if (server->credits <= 0) {
239 spin_unlock(&server->req_lock);
240 cifs_num_waiters_inc(server);
241 rc = wait_event_killable(server->request_q,
242 has_credits(server, &server->credits, 1));
243 cifs_num_waiters_dec(server);
244 if (rc)
245 return rc;
246 spin_lock(&server->req_lock);
247 } else {
248 scredits = server->credits;
249 /* can deadlock with reopen */
250 if (scredits <= 8) {
251 *num = SMB2_MAX_BUFFER_SIZE;
252 credits->value = 0;
253 credits->instance = 0;
254 break;
255 }
256
257 /* leave some credits for reopen and other ops */
258 scredits -= 8;
259 *num = min_t(unsigned int, size,
260 scredits * SMB2_MAX_BUFFER_SIZE);
261
262 credits->value =
263 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
264 credits->instance = server->reconnect_instance;
265 server->credits -= credits->value;
266 server->in_flight++;
267 if (server->in_flight > server->max_in_flight)
268 server->max_in_flight = server->in_flight;
269 break;
270 }
271 }
272 scredits = server->credits;
273 in_flight = server->in_flight;
274 spin_unlock(&server->req_lock);
275
276 trace_smb3_wait_credits(server->CurrentMid,
277 server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
278 cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
279 __func__, credits->value, scredits);
280
281 return rc;
282 }
283
284 static int
smb2_adjust_credits(struct TCP_Server_Info * server,struct cifs_credits * credits,const unsigned int payload_size)285 smb2_adjust_credits(struct TCP_Server_Info *server,
286 struct cifs_credits *credits,
287 const unsigned int payload_size)
288 {
289 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
290 int scredits, in_flight;
291
292 if (!credits->value || credits->value == new_val)
293 return 0;
294
295 if (credits->value < new_val) {
296 trace_smb3_too_many_credits(server->CurrentMid,
297 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
298 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
299 credits->value, new_val);
300
301 return -EOPNOTSUPP;
302 }
303
304 spin_lock(&server->req_lock);
305
306 if (server->reconnect_instance != credits->instance) {
307 scredits = server->credits;
308 in_flight = server->in_flight;
309 spin_unlock(&server->req_lock);
310
311 trace_smb3_reconnect_detected(server->CurrentMid,
312 server->conn_id, server->hostname, scredits,
313 credits->value - new_val, in_flight);
314 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
315 credits->value - new_val);
316 return -EAGAIN;
317 }
318
319 server->credits += credits->value - new_val;
320 scredits = server->credits;
321 in_flight = server->in_flight;
322 spin_unlock(&server->req_lock);
323 wake_up(&server->request_q);
324
325 trace_smb3_adj_credits(server->CurrentMid,
326 server->conn_id, server->hostname, scredits,
327 credits->value - new_val, in_flight);
328 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
329 __func__, credits->value - new_val, scredits);
330
331 credits->value = new_val;
332
333 return 0;
334 }
335
336 static __u64
smb2_get_next_mid(struct TCP_Server_Info * server)337 smb2_get_next_mid(struct TCP_Server_Info *server)
338 {
339 __u64 mid;
340 /* for SMB2 we need the current value */
341 spin_lock(&server->mid_lock);
342 mid = server->CurrentMid++;
343 spin_unlock(&server->mid_lock);
344 return mid;
345 }
346
347 static void
smb2_revert_current_mid(struct TCP_Server_Info * server,const unsigned int val)348 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
349 {
350 spin_lock(&server->mid_lock);
351 if (server->CurrentMid >= val)
352 server->CurrentMid -= val;
353 spin_unlock(&server->mid_lock);
354 }
355
356 static struct mid_q_entry *
__smb2_find_mid(struct TCP_Server_Info * server,char * buf,bool dequeue)357 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
358 {
359 struct mid_q_entry *mid;
360 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
361 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
362
363 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
364 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
365 return NULL;
366 }
367
368 spin_lock(&server->mid_lock);
369 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
370 if ((mid->mid == wire_mid) &&
371 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
372 (mid->command == shdr->Command)) {
373 kref_get(&mid->refcount);
374 if (dequeue) {
375 list_del_init(&mid->qhead);
376 mid->mid_flags |= MID_DELETED;
377 }
378 spin_unlock(&server->mid_lock);
379 return mid;
380 }
381 }
382 spin_unlock(&server->mid_lock);
383 return NULL;
384 }
385
386 static struct mid_q_entry *
smb2_find_mid(struct TCP_Server_Info * server,char * buf)387 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
388 {
389 return __smb2_find_mid(server, buf, false);
390 }
391
392 static struct mid_q_entry *
smb2_find_dequeue_mid(struct TCP_Server_Info * server,char * buf)393 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
394 {
395 return __smb2_find_mid(server, buf, true);
396 }
397
398 static void
smb2_dump_detail(void * buf,struct TCP_Server_Info * server)399 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
400 {
401 #ifdef CONFIG_CIFS_DEBUG2
402 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
403
404 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
405 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
406 shdr->Id.SyncId.ProcessId);
407 if (!server->ops->check_message(buf, server->total_read, server)) {
408 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
409 server->ops->calc_smb_size(buf));
410 }
411 #endif
412 }
413
414 static bool
smb2_need_neg(struct TCP_Server_Info * server)415 smb2_need_neg(struct TCP_Server_Info *server)
416 {
417 return server->max_read == 0;
418 }
419
420 static int
smb2_negotiate(const unsigned int xid,struct cifs_ses * ses,struct TCP_Server_Info * server)421 smb2_negotiate(const unsigned int xid,
422 struct cifs_ses *ses,
423 struct TCP_Server_Info *server)
424 {
425 int rc;
426
427 spin_lock(&server->mid_lock);
428 server->CurrentMid = 0;
429 spin_unlock(&server->mid_lock);
430 rc = SMB2_negotiate(xid, ses, server);
431 /* BB we probably don't need to retry with modern servers */
432 if (rc == -EAGAIN)
433 rc = -EHOSTDOWN;
434 return rc;
435 }
436
437 static unsigned int
smb2_negotiate_wsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)438 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
439 {
440 struct TCP_Server_Info *server = tcon->ses->server;
441 unsigned int wsize;
442
443 /* start with specified wsize, or default */
444 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
445 wsize = min_t(unsigned int, wsize, server->max_write);
446 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
447 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
448
449 return wsize;
450 }
451
452 static unsigned int
smb3_negotiate_wsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)453 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
454 {
455 struct TCP_Server_Info *server = tcon->ses->server;
456 unsigned int wsize;
457
458 /* start with specified wsize, or default */
459 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
460 wsize = min_t(unsigned int, wsize, server->max_write);
461 #ifdef CONFIG_CIFS_SMB_DIRECT
462 if (server->rdma) {
463 if (server->sign)
464 /*
465 * Account for SMB2 data transfer packet header and
466 * possible encryption header
467 */
468 wsize = min_t(unsigned int,
469 wsize,
470 server->smbd_conn->max_fragmented_send_size -
471 SMB2_READWRITE_PDU_HEADER_SIZE -
472 sizeof(struct smb2_transform_hdr));
473 else
474 wsize = min_t(unsigned int,
475 wsize, server->smbd_conn->max_readwrite_size);
476 }
477 #endif
478 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
479 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
480
481 return wsize;
482 }
483
484 static unsigned int
smb2_negotiate_rsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)485 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
486 {
487 struct TCP_Server_Info *server = tcon->ses->server;
488 unsigned int rsize;
489
490 /* start with specified rsize, or default */
491 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
492 rsize = min_t(unsigned int, rsize, server->max_read);
493
494 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
495 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
496
497 return rsize;
498 }
499
500 static unsigned int
smb3_negotiate_rsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)501 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
502 {
503 struct TCP_Server_Info *server = tcon->ses->server;
504 unsigned int rsize;
505
506 /* start with specified rsize, or default */
507 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
508 rsize = min_t(unsigned int, rsize, server->max_read);
509 #ifdef CONFIG_CIFS_SMB_DIRECT
510 if (server->rdma) {
511 if (server->sign)
512 /*
513 * Account for SMB2 data transfer packet header and
514 * possible encryption header
515 */
516 rsize = min_t(unsigned int,
517 rsize,
518 server->smbd_conn->max_fragmented_recv_size -
519 SMB2_READWRITE_PDU_HEADER_SIZE -
520 sizeof(struct smb2_transform_hdr));
521 else
522 rsize = min_t(unsigned int,
523 rsize, server->smbd_conn->max_readwrite_size);
524 }
525 #endif
526
527 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
528 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
529
530 return rsize;
531 }
532
533 /*
534 * compare two interfaces a and b
535 * return 0 if everything matches.
536 * return 1 if a is rdma capable, or rss capable, or has higher link speed
537 * return -1 otherwise.
538 */
539 static int
iface_cmp(struct cifs_server_iface * a,struct cifs_server_iface * b)540 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
541 {
542 int cmp_ret = 0;
543
544 WARN_ON(!a || !b);
545 if (a->rdma_capable == b->rdma_capable) {
546 if (a->rss_capable == b->rss_capable) {
547 if (a->speed == b->speed) {
548 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
549 (struct sockaddr *) &b->sockaddr);
550 if (!cmp_ret)
551 return 0;
552 else if (cmp_ret > 0)
553 return 1;
554 else
555 return -1;
556 } else if (a->speed > b->speed)
557 return 1;
558 else
559 return -1;
560 } else if (a->rss_capable > b->rss_capable)
561 return 1;
562 else
563 return -1;
564 } else if (a->rdma_capable > b->rdma_capable)
565 return 1;
566 else
567 return -1;
568 }
569
570 static int
parse_server_interfaces(struct network_interface_info_ioctl_rsp * buf,size_t buf_len,struct cifs_ses * ses,bool in_mount)571 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
572 size_t buf_len, struct cifs_ses *ses, bool in_mount)
573 {
574 struct network_interface_info_ioctl_rsp *p;
575 struct sockaddr_in *addr4;
576 struct sockaddr_in6 *addr6;
577 struct iface_info_ipv4 *p4;
578 struct iface_info_ipv6 *p6;
579 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
580 struct cifs_server_iface tmp_iface;
581 ssize_t bytes_left;
582 size_t next = 0;
583 int nb_iface = 0;
584 int rc = 0, ret = 0;
585
586 bytes_left = buf_len;
587 p = buf;
588
589 spin_lock(&ses->iface_lock);
590 /* do not query too frequently, this time with lock held */
591 if (ses->iface_last_update &&
592 time_before(jiffies, ses->iface_last_update +
593 (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
594 spin_unlock(&ses->iface_lock);
595 return 0;
596 }
597
598 /*
599 * Go through iface_list and mark them as inactive
600 */
601 list_for_each_entry_safe(iface, niface, &ses->iface_list,
602 iface_head)
603 iface->is_active = 0;
604
605 spin_unlock(&ses->iface_lock);
606
607 /*
608 * Samba server e.g. can return an empty interface list in some cases,
609 * which would only be a problem if we were requesting multichannel
610 */
611 if (bytes_left == 0) {
612 /* avoid spamming logs every 10 minutes, so log only in mount */
613 if ((ses->chan_max > 1) && in_mount)
614 cifs_dbg(VFS,
615 "multichannel not available\n"
616 "Empty network interface list returned by server %s\n",
617 ses->server->hostname);
618 rc = -EOPNOTSUPP;
619 ses->iface_last_update = jiffies;
620 goto out;
621 }
622
623 while (bytes_left >= (ssize_t)sizeof(*p)) {
624 memset(&tmp_iface, 0, sizeof(tmp_iface));
625 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
626 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
627 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
628
629 switch (p->Family) {
630 /*
631 * The kernel and wire socket structures have the same
632 * layout and use network byte order but make the
633 * conversion explicit in case either one changes.
634 */
635 case INTERNETWORK:
636 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
637 p4 = (struct iface_info_ipv4 *)p->Buffer;
638 addr4->sin_family = AF_INET;
639 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
640
641 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
642 addr4->sin_port = cpu_to_be16(CIFS_PORT);
643
644 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
645 &addr4->sin_addr);
646 break;
647 case INTERNETWORKV6:
648 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
649 p6 = (struct iface_info_ipv6 *)p->Buffer;
650 addr6->sin6_family = AF_INET6;
651 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
652
653 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
654 addr6->sin6_flowinfo = 0;
655 addr6->sin6_scope_id = 0;
656 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
657
658 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
659 &addr6->sin6_addr);
660 break;
661 default:
662 cifs_dbg(VFS,
663 "%s: skipping unsupported socket family\n",
664 __func__);
665 goto next_iface;
666 }
667
668 /*
669 * The iface_list is assumed to be sorted by speed.
670 * Check if the new interface exists in that list.
671 * NEVER change iface. it could be in use.
672 * Add a new one instead
673 */
674 spin_lock(&ses->iface_lock);
675 list_for_each_entry_safe(iface, niface, &ses->iface_list,
676 iface_head) {
677 ret = iface_cmp(iface, &tmp_iface);
678 if (!ret) {
679 iface->is_active = 1;
680 spin_unlock(&ses->iface_lock);
681 goto next_iface;
682 } else if (ret < 0) {
683 /* all remaining ifaces are slower */
684 kref_get(&iface->refcount);
685 break;
686 }
687 }
688 spin_unlock(&ses->iface_lock);
689
690 /* no match. insert the entry in the list */
691 info = kmalloc(sizeof(struct cifs_server_iface),
692 GFP_KERNEL);
693 if (!info) {
694 rc = -ENOMEM;
695 goto out;
696 }
697 memcpy(info, &tmp_iface, sizeof(tmp_iface));
698
699 /* add this new entry to the list */
700 kref_init(&info->refcount);
701 info->is_active = 1;
702
703 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
704 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
705 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
706 le32_to_cpu(p->Capability));
707
708 spin_lock(&ses->iface_lock);
709 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
710 list_add_tail(&info->iface_head, &iface->iface_head);
711 kref_put(&iface->refcount, release_iface);
712 } else
713 list_add_tail(&info->iface_head, &ses->iface_list);
714
715 ses->iface_count++;
716 spin_unlock(&ses->iface_lock);
717 next_iface:
718 nb_iface++;
719 next = le32_to_cpu(p->Next);
720 if (!next) {
721 bytes_left -= sizeof(*p);
722 break;
723 }
724 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
725 bytes_left -= next;
726 }
727
728 if (!nb_iface) {
729 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
730 rc = -EINVAL;
731 goto out;
732 }
733
734 /* Azure rounds the buffer size up 8, to a 16 byte boundary */
735 if ((bytes_left > 8) || p->Next)
736 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
737
738 ses->iface_last_update = jiffies;
739
740 out:
741 /*
742 * Go through the list again and put the inactive entries
743 */
744 spin_lock(&ses->iface_lock);
745 list_for_each_entry_safe(iface, niface, &ses->iface_list,
746 iface_head) {
747 if (!iface->is_active) {
748 list_del(&iface->iface_head);
749 kref_put(&iface->refcount, release_iface);
750 ses->iface_count--;
751 }
752 }
753 spin_unlock(&ses->iface_lock);
754
755 return rc;
756 }
757
758 int
SMB3_request_interfaces(const unsigned int xid,struct cifs_tcon * tcon,bool in_mount)759 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
760 {
761 int rc;
762 unsigned int ret_data_len = 0;
763 struct network_interface_info_ioctl_rsp *out_buf = NULL;
764 struct cifs_ses *ses = tcon->ses;
765 struct TCP_Server_Info *pserver;
766
767 /* do not query too frequently */
768 if (ses->iface_last_update &&
769 time_before(jiffies, ses->iface_last_update +
770 (SMB_INTERFACE_POLL_INTERVAL * HZ)))
771 return 0;
772
773 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
774 FSCTL_QUERY_NETWORK_INTERFACE_INFO,
775 NULL /* no data input */, 0 /* no data input */,
776 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
777 if (rc == -EOPNOTSUPP) {
778 cifs_dbg(FYI,
779 "server does not support query network interfaces\n");
780 ret_data_len = 0;
781 } else if (rc != 0) {
782 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
783 goto out;
784 }
785
786 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
787 if (rc)
788 goto out;
789
790 /* check if iface is still active */
791 spin_lock(&ses->chan_lock);
792 pserver = ses->chans[0].server;
793 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
794 spin_unlock(&ses->chan_lock);
795 cifs_chan_update_iface(ses, pserver);
796 spin_lock(&ses->chan_lock);
797 }
798 spin_unlock(&ses->chan_lock);
799
800 out:
801 kfree(out_buf);
802 return rc;
803 }
804
805 static void
smb3_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)806 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
807 struct cifs_sb_info *cifs_sb)
808 {
809 int rc;
810 __le16 srch_path = 0; /* Null - open root of share */
811 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
812 struct cifs_open_parms oparms;
813 struct cifs_fid fid;
814 struct cached_fid *cfid = NULL;
815
816 oparms = (struct cifs_open_parms) {
817 .tcon = tcon,
818 .path = "",
819 .desired_access = FILE_READ_ATTRIBUTES,
820 .disposition = FILE_OPEN,
821 .create_options = cifs_create_options(cifs_sb, 0),
822 .fid = &fid,
823 };
824
825 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
826 if (rc == 0)
827 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
828 else
829 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
830 NULL, NULL);
831 if (rc)
832 return;
833
834 SMB3_request_interfaces(xid, tcon, true /* called during mount */);
835
836 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
837 FS_ATTRIBUTE_INFORMATION);
838 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
839 FS_DEVICE_INFORMATION);
840 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
841 FS_VOLUME_INFORMATION);
842 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
843 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
844 if (cfid == NULL)
845 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
846 else
847 close_cached_dir(cfid);
848 }
849
850 static void
smb2_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)851 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
852 struct cifs_sb_info *cifs_sb)
853 {
854 int rc;
855 __le16 srch_path = 0; /* Null - open root of share */
856 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
857 struct cifs_open_parms oparms;
858 struct cifs_fid fid;
859
860 oparms = (struct cifs_open_parms) {
861 .tcon = tcon,
862 .path = "",
863 .desired_access = FILE_READ_ATTRIBUTES,
864 .disposition = FILE_OPEN,
865 .create_options = cifs_create_options(cifs_sb, 0),
866 .fid = &fid,
867 };
868
869 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
870 NULL, NULL);
871 if (rc)
872 return;
873
874 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
875 FS_ATTRIBUTE_INFORMATION);
876 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
877 FS_DEVICE_INFORMATION);
878 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
879 }
880
881 static int
smb2_is_path_accessible(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path)882 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
883 struct cifs_sb_info *cifs_sb, const char *full_path)
884 {
885 __le16 *utf16_path;
886 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
887 int err_buftype = CIFS_NO_BUFFER;
888 struct cifs_open_parms oparms;
889 struct kvec err_iov = {};
890 struct cifs_fid fid;
891 struct cached_fid *cfid;
892 bool islink;
893 int rc, rc2;
894
895 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
896 if (!rc) {
897 if (cfid->has_lease) {
898 close_cached_dir(cfid);
899 return 0;
900 }
901 close_cached_dir(cfid);
902 }
903
904 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
905 if (!utf16_path)
906 return -ENOMEM;
907
908 oparms = (struct cifs_open_parms) {
909 .tcon = tcon,
910 .path = full_path,
911 .desired_access = FILE_READ_ATTRIBUTES,
912 .disposition = FILE_OPEN,
913 .create_options = cifs_create_options(cifs_sb, 0),
914 .fid = &fid,
915 };
916
917 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
918 &err_iov, &err_buftype);
919 if (rc) {
920 struct smb2_hdr *hdr = err_iov.iov_base;
921
922 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
923 goto out;
924
925 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
926 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
927 full_path, &islink);
928 if (rc2) {
929 rc = rc2;
930 goto out;
931 }
932 if (islink)
933 rc = -EREMOTE;
934 }
935 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
936 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
937 rc = -EOPNOTSUPP;
938 goto out;
939 }
940
941 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
942
943 out:
944 free_rsp_buf(err_buftype, err_iov.iov_base);
945 kfree(utf16_path);
946 return rc;
947 }
948
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)949 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
950 struct cifs_sb_info *cifs_sb, const char *full_path,
951 u64 *uniqueid, struct cifs_open_info_data *data)
952 {
953 *uniqueid = le64_to_cpu(data->fi.IndexNumber);
954 return 0;
955 }
956
smb2_query_file_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct cifs_open_info_data * data)957 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
958 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
959 {
960 struct cifs_fid *fid = &cfile->fid;
961
962 if (cfile->symlink_target) {
963 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
964 if (!data->symlink_target)
965 return -ENOMEM;
966 }
967 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
968 }
969
970 #ifdef CONFIG_CIFS_XATTR
971 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)972 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
973 struct smb2_file_full_ea_info *src, size_t src_size,
974 const unsigned char *ea_name)
975 {
976 int rc = 0;
977 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
978 char *name, *value;
979 size_t buf_size = dst_size;
980 size_t name_len, value_len, user_name_len;
981
982 while (src_size > 0) {
983 name_len = (size_t)src->ea_name_length;
984 value_len = (size_t)le16_to_cpu(src->ea_value_length);
985
986 if (name_len == 0)
987 break;
988
989 if (src_size < 8 + name_len + 1 + value_len) {
990 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
991 rc = -EIO;
992 goto out;
993 }
994
995 name = &src->ea_data[0];
996 value = &src->ea_data[src->ea_name_length + 1];
997
998 if (ea_name) {
999 if (ea_name_len == name_len &&
1000 memcmp(ea_name, name, name_len) == 0) {
1001 rc = value_len;
1002 if (dst_size == 0)
1003 goto out;
1004 if (dst_size < value_len) {
1005 rc = -ERANGE;
1006 goto out;
1007 }
1008 memcpy(dst, value, value_len);
1009 goto out;
1010 }
1011 } else {
1012 /* 'user.' plus a terminating null */
1013 user_name_len = 5 + 1 + name_len;
1014
1015 if (buf_size == 0) {
1016 /* skip copy - calc size only */
1017 rc += user_name_len;
1018 } else if (dst_size >= user_name_len) {
1019 dst_size -= user_name_len;
1020 memcpy(dst, "user.", 5);
1021 dst += 5;
1022 memcpy(dst, src->ea_data, name_len);
1023 dst += name_len;
1024 *dst = 0;
1025 ++dst;
1026 rc += user_name_len;
1027 } else {
1028 /* stop before overrun buffer */
1029 rc = -ERANGE;
1030 break;
1031 }
1032 }
1033
1034 if (!src->next_entry_offset)
1035 break;
1036
1037 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1038 /* stop before overrun buffer */
1039 rc = -ERANGE;
1040 break;
1041 }
1042 src_size -= le32_to_cpu(src->next_entry_offset);
1043 src = (void *)((char *)src +
1044 le32_to_cpu(src->next_entry_offset));
1045 }
1046
1047 /* didn't find the named attribute */
1048 if (ea_name)
1049 rc = -ENODATA;
1050
1051 out:
1052 return (ssize_t)rc;
1053 }
1054
1055 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)1056 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1057 const unsigned char *path, const unsigned char *ea_name,
1058 char *ea_data, size_t buf_size,
1059 struct cifs_sb_info *cifs_sb)
1060 {
1061 int rc;
1062 struct kvec rsp_iov = {NULL, 0};
1063 int buftype = CIFS_NO_BUFFER;
1064 struct smb2_query_info_rsp *rsp;
1065 struct smb2_file_full_ea_info *info = NULL;
1066
1067 rc = smb2_query_info_compound(xid, tcon, path,
1068 FILE_READ_EA,
1069 FILE_FULL_EA_INFORMATION,
1070 SMB2_O_INFO_FILE,
1071 CIFSMaxBufSize -
1072 MAX_SMB2_CREATE_RESPONSE_SIZE -
1073 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1074 &rsp_iov, &buftype, cifs_sb);
1075 if (rc) {
1076 /*
1077 * If ea_name is NULL (listxattr) and there are no EAs,
1078 * return 0 as it's not an error. Otherwise, the specified
1079 * ea_name was not found.
1080 */
1081 if (!ea_name && rc == -ENODATA)
1082 rc = 0;
1083 goto qeas_exit;
1084 }
1085
1086 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1087 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1088 le32_to_cpu(rsp->OutputBufferLength),
1089 &rsp_iov,
1090 sizeof(struct smb2_file_full_ea_info));
1091 if (rc)
1092 goto qeas_exit;
1093
1094 info = (struct smb2_file_full_ea_info *)(
1095 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1096 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1097 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1098
1099 qeas_exit:
1100 free_rsp_buf(buftype, rsp_iov.iov_base);
1101 return rc;
1102 }
1103
1104 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)1105 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1106 const char *path, const char *ea_name, const void *ea_value,
1107 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1108 struct cifs_sb_info *cifs_sb)
1109 {
1110 struct smb2_compound_vars *vars;
1111 struct cifs_ses *ses = tcon->ses;
1112 struct TCP_Server_Info *server;
1113 struct smb_rqst *rqst;
1114 struct kvec *rsp_iov;
1115 __le16 *utf16_path = NULL;
1116 int ea_name_len = strlen(ea_name);
1117 int flags = CIFS_CP_CREATE_CLOSE_OP;
1118 int len;
1119 int resp_buftype[3];
1120 struct cifs_open_parms oparms;
1121 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1122 struct cifs_fid fid;
1123 unsigned int size[1];
1124 void *data[1];
1125 struct smb2_file_full_ea_info *ea = NULL;
1126 struct smb2_query_info_rsp *rsp;
1127 int rc, used_len = 0;
1128 int retries = 0, cur_sleep = 1;
1129
1130 replay_again:
1131 /* reinitialize for possible replay */
1132 flags = CIFS_CP_CREATE_CLOSE_OP;
1133 oplock = SMB2_OPLOCK_LEVEL_NONE;
1134 server = cifs_pick_channel(ses);
1135
1136 if (smb3_encryption_required(tcon))
1137 flags |= CIFS_TRANSFORM_REQ;
1138
1139 if (ea_name_len > 255)
1140 return -EINVAL;
1141
1142 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1143 if (!utf16_path)
1144 return -ENOMEM;
1145
1146 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1147 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1148 if (!vars) {
1149 rc = -ENOMEM;
1150 goto out_free_path;
1151 }
1152 rqst = vars->rqst;
1153 rsp_iov = vars->rsp_iov;
1154
1155 if (ses->server->ops->query_all_EAs) {
1156 if (!ea_value) {
1157 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1158 ea_name, NULL, 0,
1159 cifs_sb);
1160 if (rc == -ENODATA)
1161 goto sea_exit;
1162 } else {
1163 /* If we are adding a attribute we should first check
1164 * if there will be enough space available to store
1165 * the new EA. If not we should not add it since we
1166 * would not be able to even read the EAs back.
1167 */
1168 rc = smb2_query_info_compound(xid, tcon, path,
1169 FILE_READ_EA,
1170 FILE_FULL_EA_INFORMATION,
1171 SMB2_O_INFO_FILE,
1172 CIFSMaxBufSize -
1173 MAX_SMB2_CREATE_RESPONSE_SIZE -
1174 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1175 &rsp_iov[1], &resp_buftype[1], cifs_sb);
1176 if (rc == 0) {
1177 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1178 used_len = le32_to_cpu(rsp->OutputBufferLength);
1179 }
1180 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1181 resp_buftype[1] = CIFS_NO_BUFFER;
1182 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1183 rc = 0;
1184
1185 /* Use a fudge factor of 256 bytes in case we collide
1186 * with a different set_EAs command.
1187 */
1188 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1189 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1190 used_len + ea_name_len + ea_value_len + 1) {
1191 rc = -ENOSPC;
1192 goto sea_exit;
1193 }
1194 }
1195 }
1196
1197 /* Open */
1198 rqst[0].rq_iov = vars->open_iov;
1199 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1200
1201 oparms = (struct cifs_open_parms) {
1202 .tcon = tcon,
1203 .path = path,
1204 .desired_access = FILE_WRITE_EA,
1205 .disposition = FILE_OPEN,
1206 .create_options = cifs_create_options(cifs_sb, 0),
1207 .fid = &fid,
1208 .replay = !!(retries),
1209 };
1210
1211 rc = SMB2_open_init(tcon, server,
1212 &rqst[0], &oplock, &oparms, utf16_path);
1213 if (rc)
1214 goto sea_exit;
1215 smb2_set_next_command(tcon, &rqst[0]);
1216
1217
1218 /* Set Info */
1219 rqst[1].rq_iov = vars->si_iov;
1220 rqst[1].rq_nvec = 1;
1221
1222 len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1223 ea = kzalloc(len, GFP_KERNEL);
1224 if (ea == NULL) {
1225 rc = -ENOMEM;
1226 goto sea_exit;
1227 }
1228
1229 ea->ea_name_length = ea_name_len;
1230 ea->ea_value_length = cpu_to_le16(ea_value_len);
1231 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1232 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1233
1234 size[0] = len;
1235 data[0] = ea;
1236
1237 rc = SMB2_set_info_init(tcon, server,
1238 &rqst[1], COMPOUND_FID,
1239 COMPOUND_FID, current->tgid,
1240 FILE_FULL_EA_INFORMATION,
1241 SMB2_O_INFO_FILE, 0, data, size);
1242 if (rc)
1243 goto sea_exit;
1244 smb2_set_next_command(tcon, &rqst[1]);
1245 smb2_set_related(&rqst[1]);
1246
1247 /* Close */
1248 rqst[2].rq_iov = &vars->close_iov;
1249 rqst[2].rq_nvec = 1;
1250 rc = SMB2_close_init(tcon, server,
1251 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1252 if (rc)
1253 goto sea_exit;
1254 smb2_set_related(&rqst[2]);
1255
1256 if (retries) {
1257 smb2_set_replay(server, &rqst[0]);
1258 smb2_set_replay(server, &rqst[1]);
1259 smb2_set_replay(server, &rqst[2]);
1260 }
1261
1262 rc = compound_send_recv(xid, ses, server,
1263 flags, 3, rqst,
1264 resp_buftype, rsp_iov);
1265 /* no need to bump num_remote_opens because handle immediately closed */
1266
1267 sea_exit:
1268 kfree(ea);
1269 SMB2_open_free(&rqst[0]);
1270 SMB2_set_info_free(&rqst[1]);
1271 SMB2_close_free(&rqst[2]);
1272 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1273 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1274 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1275 kfree(vars);
1276 out_free_path:
1277 kfree(utf16_path);
1278
1279 if (is_replayable_error(rc) &&
1280 smb2_should_replay(tcon, &retries, &cur_sleep))
1281 goto replay_again;
1282
1283 return rc;
1284 }
1285 #endif
1286
1287 static bool
smb2_can_echo(struct TCP_Server_Info * server)1288 smb2_can_echo(struct TCP_Server_Info *server)
1289 {
1290 return server->echoes;
1291 }
1292
1293 static void
smb2_clear_stats(struct cifs_tcon * tcon)1294 smb2_clear_stats(struct cifs_tcon *tcon)
1295 {
1296 int i;
1297
1298 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1299 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1300 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1301 }
1302 }
1303
1304 static void
smb2_dump_share_caps(struct seq_file * m,struct cifs_tcon * tcon)1305 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1306 {
1307 seq_puts(m, "\n\tShare Capabilities:");
1308 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1309 seq_puts(m, " DFS,");
1310 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1311 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1312 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1313 seq_puts(m, " SCALEOUT,");
1314 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1315 seq_puts(m, " CLUSTER,");
1316 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1317 seq_puts(m, " ASYMMETRIC,");
1318 if (tcon->capabilities == 0)
1319 seq_puts(m, " None");
1320 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1321 seq_puts(m, " Aligned,");
1322 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1323 seq_puts(m, " Partition Aligned,");
1324 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1325 seq_puts(m, " SSD,");
1326 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1327 seq_puts(m, " TRIM-support,");
1328
1329 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1330 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1331 if (tcon->perf_sector_size)
1332 seq_printf(m, "\tOptimal sector size: 0x%x",
1333 tcon->perf_sector_size);
1334 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1335 }
1336
1337 static void
smb2_print_stats(struct seq_file * m,struct cifs_tcon * tcon)1338 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1339 {
1340 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1341 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1342
1343 /*
1344 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1345 * totals (requests sent) since those SMBs are per-session not per tcon
1346 */
1347 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1348 (long long)(tcon->bytes_read),
1349 (long long)(tcon->bytes_written));
1350 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1351 atomic_read(&tcon->num_local_opens),
1352 atomic_read(&tcon->num_remote_opens));
1353 seq_printf(m, "\nTreeConnects: %d total %d failed",
1354 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1355 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1356 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1357 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1358 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1359 seq_printf(m, "\nCreates: %d total %d failed",
1360 atomic_read(&sent[SMB2_CREATE_HE]),
1361 atomic_read(&failed[SMB2_CREATE_HE]));
1362 seq_printf(m, "\nCloses: %d total %d failed",
1363 atomic_read(&sent[SMB2_CLOSE_HE]),
1364 atomic_read(&failed[SMB2_CLOSE_HE]));
1365 seq_printf(m, "\nFlushes: %d total %d failed",
1366 atomic_read(&sent[SMB2_FLUSH_HE]),
1367 atomic_read(&failed[SMB2_FLUSH_HE]));
1368 seq_printf(m, "\nReads: %d total %d failed",
1369 atomic_read(&sent[SMB2_READ_HE]),
1370 atomic_read(&failed[SMB2_READ_HE]));
1371 seq_printf(m, "\nWrites: %d total %d failed",
1372 atomic_read(&sent[SMB2_WRITE_HE]),
1373 atomic_read(&failed[SMB2_WRITE_HE]));
1374 seq_printf(m, "\nLocks: %d total %d failed",
1375 atomic_read(&sent[SMB2_LOCK_HE]),
1376 atomic_read(&failed[SMB2_LOCK_HE]));
1377 seq_printf(m, "\nIOCTLs: %d total %d failed",
1378 atomic_read(&sent[SMB2_IOCTL_HE]),
1379 atomic_read(&failed[SMB2_IOCTL_HE]));
1380 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1381 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1382 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1383 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1384 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1385 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1386 seq_printf(m, "\nQueryInfos: %d total %d failed",
1387 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1388 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1389 seq_printf(m, "\nSetInfos: %d total %d failed",
1390 atomic_read(&sent[SMB2_SET_INFO_HE]),
1391 atomic_read(&failed[SMB2_SET_INFO_HE]));
1392 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1393 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1394 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1395 }
1396
1397 static void
smb2_set_fid(struct cifsFileInfo * cfile,struct cifs_fid * fid,__u32 oplock)1398 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1399 {
1400 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1401 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1402
1403 cfile->fid.persistent_fid = fid->persistent_fid;
1404 cfile->fid.volatile_fid = fid->volatile_fid;
1405 cfile->fid.access = fid->access;
1406 #ifdef CONFIG_CIFS_DEBUG2
1407 cfile->fid.mid = fid->mid;
1408 #endif /* CIFS_DEBUG2 */
1409 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1410 &fid->purge_cache);
1411 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1412 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1413 }
1414
1415 static int
smb2_close_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1416 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1417 struct cifs_fid *fid)
1418 {
1419 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1420 }
1421
1422 static int
smb2_close_getattr(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)1423 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1424 struct cifsFileInfo *cfile)
1425 {
1426 struct smb2_file_network_open_info file_inf;
1427 struct inode *inode;
1428 int rc;
1429
1430 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1431 cfile->fid.volatile_fid, &file_inf);
1432 if (rc)
1433 return rc;
1434
1435 inode = d_inode(cfile->dentry);
1436
1437 spin_lock(&inode->i_lock);
1438 CIFS_I(inode)->time = jiffies;
1439
1440 /* Creation time should not need to be updated on close */
1441 if (file_inf.LastWriteTime)
1442 inode_set_mtime_to_ts(inode,
1443 cifs_NTtimeToUnix(file_inf.LastWriteTime));
1444 if (file_inf.ChangeTime)
1445 inode_set_ctime_to_ts(inode,
1446 cifs_NTtimeToUnix(file_inf.ChangeTime));
1447 if (file_inf.LastAccessTime)
1448 inode_set_atime_to_ts(inode,
1449 cifs_NTtimeToUnix(file_inf.LastAccessTime));
1450
1451 /*
1452 * i_blocks is not related to (i_size / i_blksize),
1453 * but instead 512 byte (2**9) size is required for
1454 * calculating num blocks.
1455 */
1456 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1457 inode->i_blocks =
1458 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1459
1460 /* End of file and Attributes should not have to be updated on close */
1461 spin_unlock(&inode->i_lock);
1462 return rc;
1463 }
1464
1465 static int
SMB2_request_res_key(const unsigned int xid,struct cifs_tcon * tcon,u64 persistent_fid,u64 volatile_fid,struct copychunk_ioctl * pcchunk)1466 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1467 u64 persistent_fid, u64 volatile_fid,
1468 struct copychunk_ioctl *pcchunk)
1469 {
1470 int rc;
1471 unsigned int ret_data_len;
1472 struct resume_key_req *res_key;
1473
1474 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1475 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1476 CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1477
1478 if (rc == -EOPNOTSUPP) {
1479 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1480 goto req_res_key_exit;
1481 } else if (rc) {
1482 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1483 goto req_res_key_exit;
1484 }
1485 if (ret_data_len < sizeof(struct resume_key_req)) {
1486 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1487 rc = -EINVAL;
1488 goto req_res_key_exit;
1489 }
1490 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1491
1492 req_res_key_exit:
1493 kfree(res_key);
1494 return rc;
1495 }
1496
1497 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)1498 smb2_ioctl_query_info(const unsigned int xid,
1499 struct cifs_tcon *tcon,
1500 struct cifs_sb_info *cifs_sb,
1501 __le16 *path, int is_dir,
1502 unsigned long p)
1503 {
1504 struct smb2_compound_vars *vars;
1505 struct smb_rqst *rqst;
1506 struct kvec *rsp_iov;
1507 struct cifs_ses *ses = tcon->ses;
1508 struct TCP_Server_Info *server;
1509 char __user *arg = (char __user *)p;
1510 struct smb_query_info qi;
1511 struct smb_query_info __user *pqi;
1512 int rc = 0;
1513 int flags = CIFS_CP_CREATE_CLOSE_OP;
1514 struct smb2_query_info_rsp *qi_rsp = NULL;
1515 struct smb2_ioctl_rsp *io_rsp = NULL;
1516 void *buffer = NULL;
1517 int resp_buftype[3];
1518 struct cifs_open_parms oparms;
1519 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1520 struct cifs_fid fid;
1521 unsigned int size[2];
1522 void *data[2];
1523 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1524 void (*free_req1_func)(struct smb_rqst *r);
1525 int retries = 0, cur_sleep = 1;
1526
1527 replay_again:
1528 /* reinitialize for possible replay */
1529 flags = CIFS_CP_CREATE_CLOSE_OP;
1530 oplock = SMB2_OPLOCK_LEVEL_NONE;
1531 server = cifs_pick_channel(ses);
1532
1533 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1534 if (vars == NULL)
1535 return -ENOMEM;
1536 rqst = &vars->rqst[0];
1537 rsp_iov = &vars->rsp_iov[0];
1538
1539 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1540
1541 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1542 rc = -EFAULT;
1543 goto free_vars;
1544 }
1545 if (qi.output_buffer_length > 1024) {
1546 rc = -EINVAL;
1547 goto free_vars;
1548 }
1549
1550 if (!ses || !server) {
1551 rc = -EIO;
1552 goto free_vars;
1553 }
1554
1555 if (smb3_encryption_required(tcon))
1556 flags |= CIFS_TRANSFORM_REQ;
1557
1558 if (qi.output_buffer_length) {
1559 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1560 if (IS_ERR(buffer)) {
1561 rc = PTR_ERR(buffer);
1562 goto free_vars;
1563 }
1564 }
1565
1566 /* Open */
1567 rqst[0].rq_iov = &vars->open_iov[0];
1568 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1569
1570 oparms = (struct cifs_open_parms) {
1571 .tcon = tcon,
1572 .disposition = FILE_OPEN,
1573 .create_options = cifs_create_options(cifs_sb, create_options),
1574 .fid = &fid,
1575 .replay = !!(retries),
1576 };
1577
1578 if (qi.flags & PASSTHRU_FSCTL) {
1579 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1580 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1581 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1582 break;
1583 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1584 oparms.desired_access = GENERIC_ALL;
1585 break;
1586 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1587 oparms.desired_access = GENERIC_READ;
1588 break;
1589 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1590 oparms.desired_access = GENERIC_WRITE;
1591 break;
1592 }
1593 } else if (qi.flags & PASSTHRU_SET_INFO) {
1594 oparms.desired_access = GENERIC_WRITE;
1595 } else {
1596 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1597 }
1598
1599 rc = SMB2_open_init(tcon, server,
1600 &rqst[0], &oplock, &oparms, path);
1601 if (rc)
1602 goto free_output_buffer;
1603 smb2_set_next_command(tcon, &rqst[0]);
1604
1605 /* Query */
1606 if (qi.flags & PASSTHRU_FSCTL) {
1607 /* Can eventually relax perm check since server enforces too */
1608 if (!capable(CAP_SYS_ADMIN)) {
1609 rc = -EPERM;
1610 goto free_open_req;
1611 }
1612 rqst[1].rq_iov = &vars->io_iov[0];
1613 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1614
1615 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1616 qi.info_type, buffer, qi.output_buffer_length,
1617 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1618 MAX_SMB2_CLOSE_RESPONSE_SIZE);
1619 free_req1_func = SMB2_ioctl_free;
1620 } else if (qi.flags == PASSTHRU_SET_INFO) {
1621 /* Can eventually relax perm check since server enforces too */
1622 if (!capable(CAP_SYS_ADMIN)) {
1623 rc = -EPERM;
1624 goto free_open_req;
1625 }
1626 if (qi.output_buffer_length < 8) {
1627 rc = -EINVAL;
1628 goto free_open_req;
1629 }
1630 rqst[1].rq_iov = vars->si_iov;
1631 rqst[1].rq_nvec = 1;
1632
1633 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1634 size[0] = 8;
1635 data[0] = buffer;
1636
1637 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1638 current->tgid, FILE_END_OF_FILE_INFORMATION,
1639 SMB2_O_INFO_FILE, 0, data, size);
1640 free_req1_func = SMB2_set_info_free;
1641 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1642 rqst[1].rq_iov = &vars->qi_iov;
1643 rqst[1].rq_nvec = 1;
1644
1645 rc = SMB2_query_info_init(tcon, server,
1646 &rqst[1], COMPOUND_FID,
1647 COMPOUND_FID, qi.file_info_class,
1648 qi.info_type, qi.additional_information,
1649 qi.input_buffer_length,
1650 qi.output_buffer_length, buffer);
1651 free_req1_func = SMB2_query_info_free;
1652 } else { /* unknown flags */
1653 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1654 qi.flags);
1655 rc = -EINVAL;
1656 }
1657
1658 if (rc)
1659 goto free_open_req;
1660 smb2_set_next_command(tcon, &rqst[1]);
1661 smb2_set_related(&rqst[1]);
1662
1663 /* Close */
1664 rqst[2].rq_iov = &vars->close_iov;
1665 rqst[2].rq_nvec = 1;
1666
1667 rc = SMB2_close_init(tcon, server,
1668 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1669 if (rc)
1670 goto free_req_1;
1671 smb2_set_related(&rqst[2]);
1672
1673 if (retries) {
1674 smb2_set_replay(server, &rqst[0]);
1675 smb2_set_replay(server, &rqst[1]);
1676 smb2_set_replay(server, &rqst[2]);
1677 }
1678
1679 rc = compound_send_recv(xid, ses, server,
1680 flags, 3, rqst,
1681 resp_buftype, rsp_iov);
1682 if (rc)
1683 goto out;
1684
1685 /* No need to bump num_remote_opens since handle immediately closed */
1686 if (qi.flags & PASSTHRU_FSCTL) {
1687 pqi = (struct smb_query_info __user *)arg;
1688 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1689 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1690 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1691 if (qi.input_buffer_length > 0 &&
1692 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1693 > rsp_iov[1].iov_len) {
1694 rc = -EFAULT;
1695 goto out;
1696 }
1697
1698 if (copy_to_user(&pqi->input_buffer_length,
1699 &qi.input_buffer_length,
1700 sizeof(qi.input_buffer_length))) {
1701 rc = -EFAULT;
1702 goto out;
1703 }
1704
1705 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1706 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1707 qi.input_buffer_length))
1708 rc = -EFAULT;
1709 } else {
1710 pqi = (struct smb_query_info __user *)arg;
1711 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1712 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1713 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1714 if (copy_to_user(&pqi->input_buffer_length,
1715 &qi.input_buffer_length,
1716 sizeof(qi.input_buffer_length))) {
1717 rc = -EFAULT;
1718 goto out;
1719 }
1720
1721 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1722 qi.input_buffer_length))
1723 rc = -EFAULT;
1724 }
1725
1726 out:
1727 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1728 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1729 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1730 SMB2_close_free(&rqst[2]);
1731 free_req_1:
1732 free_req1_func(&rqst[1]);
1733 free_open_req:
1734 SMB2_open_free(&rqst[0]);
1735 free_output_buffer:
1736 kfree(buffer);
1737 free_vars:
1738 kfree(vars);
1739
1740 if (is_replayable_error(rc) &&
1741 smb2_should_replay(tcon, &retries, &cur_sleep))
1742 goto replay_again;
1743
1744 return rc;
1745 }
1746
1747 static ssize_t
smb2_copychunk_range(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1748 smb2_copychunk_range(const unsigned int xid,
1749 struct cifsFileInfo *srcfile,
1750 struct cifsFileInfo *trgtfile, u64 src_off,
1751 u64 len, u64 dest_off)
1752 {
1753 int rc;
1754 unsigned int ret_data_len;
1755 struct copychunk_ioctl *pcchunk;
1756 struct copychunk_ioctl_rsp *retbuf = NULL;
1757 struct cifs_tcon *tcon;
1758 int chunks_copied = 0;
1759 bool chunk_sizes_updated = false;
1760 ssize_t bytes_written, total_bytes_written = 0;
1761
1762 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1763 if (pcchunk == NULL)
1764 return -ENOMEM;
1765
1766 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1767 /* Request a key from the server to identify the source of the copy */
1768 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1769 srcfile->fid.persistent_fid,
1770 srcfile->fid.volatile_fid, pcchunk);
1771
1772 /* Note: request_res_key sets res_key null only if rc !=0 */
1773 if (rc)
1774 goto cchunk_out;
1775
1776 /* For now array only one chunk long, will make more flexible later */
1777 pcchunk->ChunkCount = cpu_to_le32(1);
1778 pcchunk->Reserved = 0;
1779 pcchunk->Reserved2 = 0;
1780
1781 tcon = tlink_tcon(trgtfile->tlink);
1782
1783 while (len > 0) {
1784 pcchunk->SourceOffset = cpu_to_le64(src_off);
1785 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1786 pcchunk->Length =
1787 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1788
1789 /* Request server copy to target from src identified by key */
1790 kfree(retbuf);
1791 retbuf = NULL;
1792 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1793 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1794 (char *)pcchunk, sizeof(struct copychunk_ioctl),
1795 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1796 if (rc == 0) {
1797 if (ret_data_len !=
1798 sizeof(struct copychunk_ioctl_rsp)) {
1799 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1800 rc = -EIO;
1801 goto cchunk_out;
1802 }
1803 if (retbuf->TotalBytesWritten == 0) {
1804 cifs_dbg(FYI, "no bytes copied\n");
1805 rc = -EIO;
1806 goto cchunk_out;
1807 }
1808 /*
1809 * Check if server claimed to write more than we asked
1810 */
1811 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1812 le32_to_cpu(pcchunk->Length)) {
1813 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1814 rc = -EIO;
1815 goto cchunk_out;
1816 }
1817 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1818 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1819 rc = -EIO;
1820 goto cchunk_out;
1821 }
1822 chunks_copied++;
1823
1824 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1825 src_off += bytes_written;
1826 dest_off += bytes_written;
1827 len -= bytes_written;
1828 total_bytes_written += bytes_written;
1829
1830 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1831 le32_to_cpu(retbuf->ChunksWritten),
1832 le32_to_cpu(retbuf->ChunkBytesWritten),
1833 bytes_written);
1834 } else if (rc == -EINVAL) {
1835 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1836 goto cchunk_out;
1837
1838 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1839 le32_to_cpu(retbuf->ChunksWritten),
1840 le32_to_cpu(retbuf->ChunkBytesWritten),
1841 le32_to_cpu(retbuf->TotalBytesWritten));
1842
1843 /*
1844 * Check if this is the first request using these sizes,
1845 * (ie check if copy succeed once with original sizes
1846 * and check if the server gave us different sizes after
1847 * we already updated max sizes on previous request).
1848 * if not then why is the server returning an error now
1849 */
1850 if ((chunks_copied != 0) || chunk_sizes_updated)
1851 goto cchunk_out;
1852
1853 /* Check that server is not asking us to grow size */
1854 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1855 tcon->max_bytes_chunk)
1856 tcon->max_bytes_chunk =
1857 le32_to_cpu(retbuf->ChunkBytesWritten);
1858 else
1859 goto cchunk_out; /* server gave us bogus size */
1860
1861 /* No need to change MaxChunks since already set to 1 */
1862 chunk_sizes_updated = true;
1863 } else
1864 goto cchunk_out;
1865 }
1866
1867 cchunk_out:
1868 kfree(pcchunk);
1869 kfree(retbuf);
1870 if (rc)
1871 return rc;
1872 else
1873 return total_bytes_written;
1874 }
1875
1876 static int
smb2_flush_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1877 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1878 struct cifs_fid *fid)
1879 {
1880 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1881 }
1882
1883 static unsigned int
smb2_read_data_offset(char * buf)1884 smb2_read_data_offset(char *buf)
1885 {
1886 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1887
1888 return rsp->DataOffset;
1889 }
1890
1891 static unsigned int
smb2_read_data_length(char * buf,bool in_remaining)1892 smb2_read_data_length(char *buf, bool in_remaining)
1893 {
1894 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1895
1896 if (in_remaining)
1897 return le32_to_cpu(rsp->DataRemaining);
1898
1899 return le32_to_cpu(rsp->DataLength);
1900 }
1901
1902
1903 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)1904 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1905 struct cifs_io_parms *parms, unsigned int *bytes_read,
1906 char **buf, int *buf_type)
1907 {
1908 parms->persistent_fid = pfid->persistent_fid;
1909 parms->volatile_fid = pfid->volatile_fid;
1910 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1911 }
1912
1913 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)1914 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1915 struct cifs_io_parms *parms, unsigned int *written,
1916 struct kvec *iov, unsigned long nr_segs)
1917 {
1918
1919 parms->persistent_fid = pfid->persistent_fid;
1920 parms->volatile_fid = pfid->volatile_fid;
1921 return SMB2_write(xid, parms, written, iov, nr_segs);
1922 }
1923
1924 /* 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)1925 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1926 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1927 {
1928 struct cifsInodeInfo *cifsi;
1929 int rc;
1930
1931 cifsi = CIFS_I(inode);
1932
1933 /* if file already sparse don't bother setting sparse again */
1934 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1935 return true; /* already sparse */
1936
1937 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1938 return true; /* already not sparse */
1939
1940 /*
1941 * Can't check for sparse support on share the usual way via the
1942 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1943 * since Samba server doesn't set the flag on the share, yet
1944 * supports the set sparse FSCTL and returns sparse correctly
1945 * in the file attributes. If we fail setting sparse though we
1946 * mark that server does not support sparse files for this share
1947 * to avoid repeatedly sending the unsupported fsctl to server
1948 * if the file is repeatedly extended.
1949 */
1950 if (tcon->broken_sparse_sup)
1951 return false;
1952
1953 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1954 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1955 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1956 if (rc) {
1957 tcon->broken_sparse_sup = true;
1958 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1959 return false;
1960 }
1961
1962 if (setsparse)
1963 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1964 else
1965 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1966
1967 return true;
1968 }
1969
1970 static int
smb2_set_file_size(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,__u64 size,bool set_alloc)1971 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1972 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1973 {
1974 struct inode *inode;
1975
1976 /*
1977 * If extending file more than one page make sparse. Many Linux fs
1978 * make files sparse by default when extending via ftruncate
1979 */
1980 inode = d_inode(cfile->dentry);
1981
1982 if (!set_alloc && (size > inode->i_size + 8192)) {
1983 __u8 set_sparse = 1;
1984
1985 /* whether set sparse succeeds or not, extend the file */
1986 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1987 }
1988
1989 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1990 cfile->fid.volatile_fid, cfile->pid, size);
1991 }
1992
1993 static int
smb2_duplicate_extents(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1994 smb2_duplicate_extents(const unsigned int xid,
1995 struct cifsFileInfo *srcfile,
1996 struct cifsFileInfo *trgtfile, u64 src_off,
1997 u64 len, u64 dest_off)
1998 {
1999 int rc;
2000 unsigned int ret_data_len;
2001 struct inode *inode;
2002 struct duplicate_extents_to_file dup_ext_buf;
2003 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2004
2005 /* server fileays advertise duplicate extent support with this flag */
2006 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2007 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2008 return -EOPNOTSUPP;
2009
2010 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2011 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2012 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2013 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2014 dup_ext_buf.ByteCount = cpu_to_le64(len);
2015 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2016 src_off, dest_off, len);
2017
2018 inode = d_inode(trgtfile->dentry);
2019 if (inode->i_size < dest_off + len) {
2020 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2021 if (rc)
2022 goto duplicate_extents_out;
2023
2024 /*
2025 * Although also could set plausible allocation size (i_blocks)
2026 * here in addition to setting the file size, in reflink
2027 * it is likely that the target file is sparse. Its allocation
2028 * size will be queried on next revalidate, but it is important
2029 * to make sure that file's cached size is updated immediately
2030 */
2031 cifs_setsize(inode, dest_off + len);
2032 }
2033 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2034 trgtfile->fid.volatile_fid,
2035 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2036 (char *)&dup_ext_buf,
2037 sizeof(struct duplicate_extents_to_file),
2038 CIFSMaxBufSize, NULL,
2039 &ret_data_len);
2040
2041 if (ret_data_len > 0)
2042 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2043
2044 duplicate_extents_out:
2045 return rc;
2046 }
2047
2048 static int
smb2_set_compression(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2049 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2050 struct cifsFileInfo *cfile)
2051 {
2052 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2053 cfile->fid.volatile_fid);
2054 }
2055
2056 static int
smb3_set_integrity(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2057 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2058 struct cifsFileInfo *cfile)
2059 {
2060 struct fsctl_set_integrity_information_req integr_info;
2061 unsigned int ret_data_len;
2062
2063 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2064 integr_info.Flags = 0;
2065 integr_info.Reserved = 0;
2066
2067 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2068 cfile->fid.volatile_fid,
2069 FSCTL_SET_INTEGRITY_INFORMATION,
2070 (char *)&integr_info,
2071 sizeof(struct fsctl_set_integrity_information_req),
2072 CIFSMaxBufSize, NULL,
2073 &ret_data_len);
2074
2075 }
2076
2077 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2078 #define GMT_TOKEN_SIZE 50
2079
2080 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2081
2082 /*
2083 * Input buffer contains (empty) struct smb_snapshot array with size filled in
2084 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2085 */
2086 static int
smb3_enum_snapshots(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,void __user * ioc_buf)2087 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2088 struct cifsFileInfo *cfile, void __user *ioc_buf)
2089 {
2090 char *retbuf = NULL;
2091 unsigned int ret_data_len = 0;
2092 int rc;
2093 u32 max_response_size;
2094 struct smb_snapshot_array snapshot_in;
2095
2096 /*
2097 * On the first query to enumerate the list of snapshots available
2098 * for this volume the buffer begins with 0 (number of snapshots
2099 * which can be returned is zero since at that point we do not know
2100 * how big the buffer needs to be). On the second query,
2101 * it (ret_data_len) is set to number of snapshots so we can
2102 * know to set the maximum response size larger (see below).
2103 */
2104 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2105 return -EFAULT;
2106
2107 /*
2108 * Note that for snapshot queries that servers like Azure expect that
2109 * the first query be minimal size (and just used to get the number/size
2110 * of previous versions) so response size must be specified as EXACTLY
2111 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2112 * of eight bytes.
2113 */
2114 if (ret_data_len == 0)
2115 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2116 else
2117 max_response_size = CIFSMaxBufSize;
2118
2119 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2120 cfile->fid.volatile_fid,
2121 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2122 NULL, 0 /* no input data */, max_response_size,
2123 (char **)&retbuf,
2124 &ret_data_len);
2125 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2126 rc, ret_data_len);
2127 if (rc)
2128 return rc;
2129
2130 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2131 /* Fixup buffer */
2132 if (copy_from_user(&snapshot_in, ioc_buf,
2133 sizeof(struct smb_snapshot_array))) {
2134 rc = -EFAULT;
2135 kfree(retbuf);
2136 return rc;
2137 }
2138
2139 /*
2140 * Check for min size, ie not large enough to fit even one GMT
2141 * token (snapshot). On the first ioctl some users may pass in
2142 * smaller size (or zero) to simply get the size of the array
2143 * so the user space caller can allocate sufficient memory
2144 * and retry the ioctl again with larger array size sufficient
2145 * to hold all of the snapshot GMT tokens on the second try.
2146 */
2147 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2148 ret_data_len = sizeof(struct smb_snapshot_array);
2149
2150 /*
2151 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2152 * the snapshot array (of 50 byte GMT tokens) each
2153 * representing an available previous version of the data
2154 */
2155 if (ret_data_len > (snapshot_in.snapshot_array_size +
2156 sizeof(struct smb_snapshot_array)))
2157 ret_data_len = snapshot_in.snapshot_array_size +
2158 sizeof(struct smb_snapshot_array);
2159
2160 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2161 rc = -EFAULT;
2162 }
2163
2164 kfree(retbuf);
2165 return rc;
2166 }
2167
2168
2169
2170 static int
smb3_notify(const unsigned int xid,struct file * pfile,void __user * ioc_buf,bool return_changes)2171 smb3_notify(const unsigned int xid, struct file *pfile,
2172 void __user *ioc_buf, bool return_changes)
2173 {
2174 struct smb3_notify_info notify;
2175 struct smb3_notify_info __user *pnotify_buf;
2176 struct dentry *dentry = pfile->f_path.dentry;
2177 struct inode *inode = file_inode(pfile);
2178 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2179 struct cifs_open_parms oparms;
2180 struct cifs_fid fid;
2181 struct cifs_tcon *tcon;
2182 const unsigned char *path;
2183 char *returned_ioctl_info = NULL;
2184 void *page = alloc_dentry_path();
2185 __le16 *utf16_path = NULL;
2186 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2187 int rc = 0;
2188 __u32 ret_len = 0;
2189
2190 path = build_path_from_dentry(dentry, page);
2191 if (IS_ERR(path)) {
2192 rc = PTR_ERR(path);
2193 goto notify_exit;
2194 }
2195
2196 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2197 if (utf16_path == NULL) {
2198 rc = -ENOMEM;
2199 goto notify_exit;
2200 }
2201
2202 if (return_changes) {
2203 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) {
2204 rc = -EFAULT;
2205 goto notify_exit;
2206 }
2207 } else {
2208 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) {
2209 rc = -EFAULT;
2210 goto notify_exit;
2211 }
2212 notify.data_len = 0;
2213 }
2214
2215 tcon = cifs_sb_master_tcon(cifs_sb);
2216 oparms = (struct cifs_open_parms) {
2217 .tcon = tcon,
2218 .path = path,
2219 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2220 .disposition = FILE_OPEN,
2221 .create_options = cifs_create_options(cifs_sb, 0),
2222 .fid = &fid,
2223 };
2224
2225 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2226 NULL);
2227 if (rc)
2228 goto notify_exit;
2229
2230 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2231 notify.watch_tree, notify.completion_filter,
2232 notify.data_len, &returned_ioctl_info, &ret_len);
2233
2234 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2235
2236 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2237 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2238 if (ret_len > notify.data_len)
2239 ret_len = notify.data_len;
2240 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2241 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2242 rc = -EFAULT;
2243 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2244 rc = -EFAULT;
2245 }
2246 kfree(returned_ioctl_info);
2247 notify_exit:
2248 free_dentry_path(page);
2249 kfree(utf16_path);
2250 return rc;
2251 }
2252
2253 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)2254 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2255 const char *path, struct cifs_sb_info *cifs_sb,
2256 struct cifs_fid *fid, __u16 search_flags,
2257 struct cifs_search_info *srch_inf)
2258 {
2259 __le16 *utf16_path;
2260 struct smb_rqst rqst[2];
2261 struct kvec rsp_iov[2];
2262 int resp_buftype[2];
2263 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2264 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2265 int rc, flags = 0;
2266 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2267 struct cifs_open_parms oparms;
2268 struct smb2_query_directory_rsp *qd_rsp = NULL;
2269 struct smb2_create_rsp *op_rsp = NULL;
2270 struct TCP_Server_Info *server;
2271 int retries = 0, cur_sleep = 1;
2272
2273 replay_again:
2274 /* reinitialize for possible replay */
2275 flags = 0;
2276 oplock = SMB2_OPLOCK_LEVEL_NONE;
2277 server = cifs_pick_channel(tcon->ses);
2278
2279 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2280 if (!utf16_path)
2281 return -ENOMEM;
2282
2283 if (smb3_encryption_required(tcon))
2284 flags |= CIFS_TRANSFORM_REQ;
2285
2286 memset(rqst, 0, sizeof(rqst));
2287 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2288 memset(rsp_iov, 0, sizeof(rsp_iov));
2289
2290 /* Open */
2291 memset(&open_iov, 0, sizeof(open_iov));
2292 rqst[0].rq_iov = open_iov;
2293 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2294
2295 oparms = (struct cifs_open_parms) {
2296 .tcon = tcon,
2297 .path = path,
2298 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2299 .disposition = FILE_OPEN,
2300 .create_options = cifs_create_options(cifs_sb, 0),
2301 .fid = fid,
2302 .replay = !!(retries),
2303 };
2304
2305 rc = SMB2_open_init(tcon, server,
2306 &rqst[0], &oplock, &oparms, utf16_path);
2307 if (rc)
2308 goto qdf_free;
2309 smb2_set_next_command(tcon, &rqst[0]);
2310
2311 /* Query directory */
2312 srch_inf->entries_in_buffer = 0;
2313 srch_inf->index_of_last_entry = 2;
2314
2315 memset(&qd_iov, 0, sizeof(qd_iov));
2316 rqst[1].rq_iov = qd_iov;
2317 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2318
2319 rc = SMB2_query_directory_init(xid, tcon, server,
2320 &rqst[1],
2321 COMPOUND_FID, COMPOUND_FID,
2322 0, srch_inf->info_level);
2323 if (rc)
2324 goto qdf_free;
2325
2326 smb2_set_related(&rqst[1]);
2327
2328 if (retries) {
2329 smb2_set_replay(server, &rqst[0]);
2330 smb2_set_replay(server, &rqst[1]);
2331 }
2332
2333 rc = compound_send_recv(xid, tcon->ses, server,
2334 flags, 2, rqst,
2335 resp_buftype, rsp_iov);
2336
2337 /* If the open failed there is nothing to do */
2338 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2339 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2340 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2341 goto qdf_free;
2342 }
2343 fid->persistent_fid = op_rsp->PersistentFileId;
2344 fid->volatile_fid = op_rsp->VolatileFileId;
2345
2346 /* Anything else than ENODATA means a genuine error */
2347 if (rc && rc != -ENODATA) {
2348 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2349 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2350 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2351 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2352 goto qdf_free;
2353 }
2354
2355 atomic_inc(&tcon->num_remote_opens);
2356
2357 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2358 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2359 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2360 tcon->tid, tcon->ses->Suid, 0, 0);
2361 srch_inf->endOfSearch = true;
2362 rc = 0;
2363 goto qdf_free;
2364 }
2365
2366 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2367 srch_inf);
2368 if (rc) {
2369 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2370 tcon->ses->Suid, 0, 0, rc);
2371 goto qdf_free;
2372 }
2373 resp_buftype[1] = CIFS_NO_BUFFER;
2374
2375 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2376 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2377
2378 qdf_free:
2379 kfree(utf16_path);
2380 SMB2_open_free(&rqst[0]);
2381 SMB2_query_directory_free(&rqst[1]);
2382 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2383 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2384
2385 if (is_replayable_error(rc) &&
2386 smb2_should_replay(tcon, &retries, &cur_sleep))
2387 goto replay_again;
2388
2389 return rc;
2390 }
2391
2392 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)2393 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2394 struct cifs_fid *fid, __u16 search_flags,
2395 struct cifs_search_info *srch_inf)
2396 {
2397 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2398 fid->volatile_fid, 0, srch_inf);
2399 }
2400
2401 static int
smb2_close_dir(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)2402 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2403 struct cifs_fid *fid)
2404 {
2405 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2406 }
2407
2408 /*
2409 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2410 * the number of credits and return true. Otherwise - return false.
2411 */
2412 static bool
smb2_is_status_pending(char * buf,struct TCP_Server_Info * server)2413 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2414 {
2415 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2416 int scredits, in_flight;
2417
2418 if (shdr->Status != STATUS_PENDING)
2419 return false;
2420
2421 if (shdr->CreditRequest) {
2422 spin_lock(&server->req_lock);
2423 server->credits += le16_to_cpu(shdr->CreditRequest);
2424 scredits = server->credits;
2425 in_flight = server->in_flight;
2426 spin_unlock(&server->req_lock);
2427 wake_up(&server->request_q);
2428
2429 trace_smb3_pend_credits(server->CurrentMid,
2430 server->conn_id, server->hostname, scredits,
2431 le16_to_cpu(shdr->CreditRequest), in_flight);
2432 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2433 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2434 }
2435
2436 return true;
2437 }
2438
2439 static bool
smb2_is_session_expired(char * buf)2440 smb2_is_session_expired(char *buf)
2441 {
2442 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2443
2444 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2445 shdr->Status != STATUS_USER_SESSION_DELETED)
2446 return false;
2447
2448 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2449 le64_to_cpu(shdr->SessionId),
2450 le16_to_cpu(shdr->Command),
2451 le64_to_cpu(shdr->MessageId));
2452 cifs_dbg(FYI, "Session expired or deleted\n");
2453
2454 return true;
2455 }
2456
2457 static bool
smb2_is_status_io_timeout(char * buf)2458 smb2_is_status_io_timeout(char *buf)
2459 {
2460 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2461
2462 if (shdr->Status == STATUS_IO_TIMEOUT)
2463 return true;
2464 else
2465 return false;
2466 }
2467
2468 static bool
smb2_is_network_name_deleted(char * buf,struct TCP_Server_Info * server)2469 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2470 {
2471 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2472 struct TCP_Server_Info *pserver;
2473 struct cifs_ses *ses;
2474 struct cifs_tcon *tcon;
2475
2476 if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2477 return false;
2478
2479 /* If server is a channel, select the primary channel */
2480 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2481
2482 spin_lock(&cifs_tcp_ses_lock);
2483 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2484 if (cifs_ses_exiting(ses))
2485 continue;
2486 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2487 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2488 spin_lock(&tcon->tc_lock);
2489 tcon->need_reconnect = true;
2490 spin_unlock(&tcon->tc_lock);
2491 spin_unlock(&cifs_tcp_ses_lock);
2492 pr_warn_once("Server share %s deleted.\n",
2493 tcon->tree_name);
2494 return true;
2495 }
2496 }
2497 }
2498 spin_unlock(&cifs_tcp_ses_lock);
2499
2500 return false;
2501 }
2502
2503 static int
smb2_oplock_response(struct cifs_tcon * tcon,__u64 persistent_fid,__u64 volatile_fid,__u16 net_fid,struct cifsInodeInfo * cinode)2504 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2505 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2506 {
2507 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2508 return SMB2_lease_break(0, tcon, cinode->lease_key,
2509 smb2_get_lease_state(cinode));
2510
2511 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2512 CIFS_CACHE_READ(cinode) ? 1 : 0);
2513 }
2514
2515 void
smb2_set_replay(struct TCP_Server_Info * server,struct smb_rqst * rqst)2516 smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst)
2517 {
2518 struct smb2_hdr *shdr;
2519
2520 if (server->dialect < SMB30_PROT_ID)
2521 return;
2522
2523 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2524 if (shdr == NULL) {
2525 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2526 return;
2527 }
2528 shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION;
2529 }
2530
2531 void
smb2_set_related(struct smb_rqst * rqst)2532 smb2_set_related(struct smb_rqst *rqst)
2533 {
2534 struct smb2_hdr *shdr;
2535
2536 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2537 if (shdr == NULL) {
2538 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2539 return;
2540 }
2541 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2542 }
2543
2544 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2545
2546 void
smb2_set_next_command(struct cifs_tcon * tcon,struct smb_rqst * rqst)2547 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2548 {
2549 struct smb2_hdr *shdr;
2550 struct cifs_ses *ses = tcon->ses;
2551 struct TCP_Server_Info *server = ses->server;
2552 unsigned long len = smb_rqst_len(server, rqst);
2553 int i, num_padding;
2554
2555 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2556 if (shdr == NULL) {
2557 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2558 return;
2559 }
2560
2561 /* SMB headers in a compound are 8 byte aligned. */
2562
2563 /* No padding needed */
2564 if (!(len & 7))
2565 goto finished;
2566
2567 num_padding = 8 - (len & 7);
2568 if (!smb3_encryption_required(tcon)) {
2569 /*
2570 * If we do not have encryption then we can just add an extra
2571 * iov for the padding.
2572 */
2573 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2574 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2575 rqst->rq_nvec++;
2576 len += num_padding;
2577 } else {
2578 /*
2579 * We can not add a small padding iov for the encryption case
2580 * because the encryption framework can not handle the padding
2581 * iovs.
2582 * We have to flatten this into a single buffer and add
2583 * the padding to it.
2584 */
2585 for (i = 1; i < rqst->rq_nvec; i++) {
2586 memcpy(rqst->rq_iov[0].iov_base +
2587 rqst->rq_iov[0].iov_len,
2588 rqst->rq_iov[i].iov_base,
2589 rqst->rq_iov[i].iov_len);
2590 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2591 }
2592 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2593 0, num_padding);
2594 rqst->rq_iov[0].iov_len += num_padding;
2595 len += num_padding;
2596 rqst->rq_nvec = 1;
2597 }
2598
2599 finished:
2600 shdr->NextCommand = cpu_to_le32(len);
2601 }
2602
2603 /*
2604 * helper function for exponential backoff and check if replayable
2605 */
smb2_should_replay(struct cifs_tcon * tcon,int * pretries,int * pcur_sleep)2606 bool smb2_should_replay(struct cifs_tcon *tcon,
2607 int *pretries,
2608 int *pcur_sleep)
2609 {
2610 if (!pretries || !pcur_sleep)
2611 return false;
2612
2613 if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) {
2614 msleep(*pcur_sleep);
2615 (*pcur_sleep) = ((*pcur_sleep) << 1);
2616 if ((*pcur_sleep) > CIFS_MAX_SLEEP)
2617 (*pcur_sleep) = CIFS_MAX_SLEEP;
2618 return true;
2619 }
2620
2621 return false;
2622 }
2623
2624 /*
2625 * Passes the query info response back to the caller on success.
2626 * Caller need to free this with free_rsp_buf().
2627 */
2628 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)2629 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2630 const char *path, u32 desired_access,
2631 u32 class, u32 type, u32 output_len,
2632 struct kvec *rsp, int *buftype,
2633 struct cifs_sb_info *cifs_sb)
2634 {
2635 struct smb2_compound_vars *vars;
2636 struct cifs_ses *ses = tcon->ses;
2637 struct TCP_Server_Info *server;
2638 int flags = CIFS_CP_CREATE_CLOSE_OP;
2639 struct smb_rqst *rqst;
2640 int resp_buftype[3];
2641 struct kvec *rsp_iov;
2642 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2643 struct cifs_open_parms oparms;
2644 struct cifs_fid fid;
2645 int rc;
2646 __le16 *utf16_path;
2647 struct cached_fid *cfid = NULL;
2648 int retries = 0, cur_sleep = 1;
2649
2650 replay_again:
2651 /* reinitialize for possible replay */
2652 flags = CIFS_CP_CREATE_CLOSE_OP;
2653 oplock = SMB2_OPLOCK_LEVEL_NONE;
2654 server = cifs_pick_channel(ses);
2655
2656 if (!path)
2657 path = "";
2658 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2659 if (!utf16_path)
2660 return -ENOMEM;
2661
2662 if (smb3_encryption_required(tcon))
2663 flags |= CIFS_TRANSFORM_REQ;
2664
2665 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2666 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2667 if (!vars) {
2668 rc = -ENOMEM;
2669 goto out_free_path;
2670 }
2671 rqst = vars->rqst;
2672 rsp_iov = vars->rsp_iov;
2673
2674 /*
2675 * We can only call this for things we know are directories.
2676 */
2677 if (!strcmp(path, ""))
2678 open_cached_dir(xid, tcon, path, cifs_sb, false,
2679 &cfid); /* cfid null if open dir failed */
2680
2681 rqst[0].rq_iov = vars->open_iov;
2682 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2683
2684 oparms = (struct cifs_open_parms) {
2685 .tcon = tcon,
2686 .path = path,
2687 .desired_access = desired_access,
2688 .disposition = FILE_OPEN,
2689 .create_options = cifs_create_options(cifs_sb, 0),
2690 .fid = &fid,
2691 .replay = !!(retries),
2692 };
2693
2694 rc = SMB2_open_init(tcon, server,
2695 &rqst[0], &oplock, &oparms, utf16_path);
2696 if (rc)
2697 goto qic_exit;
2698 smb2_set_next_command(tcon, &rqst[0]);
2699
2700 rqst[1].rq_iov = &vars->qi_iov;
2701 rqst[1].rq_nvec = 1;
2702
2703 if (cfid) {
2704 rc = SMB2_query_info_init(tcon, server,
2705 &rqst[1],
2706 cfid->fid.persistent_fid,
2707 cfid->fid.volatile_fid,
2708 class, type, 0,
2709 output_len, 0,
2710 NULL);
2711 } else {
2712 rc = SMB2_query_info_init(tcon, server,
2713 &rqst[1],
2714 COMPOUND_FID,
2715 COMPOUND_FID,
2716 class, type, 0,
2717 output_len, 0,
2718 NULL);
2719 }
2720 if (rc)
2721 goto qic_exit;
2722 if (!cfid) {
2723 smb2_set_next_command(tcon, &rqst[1]);
2724 smb2_set_related(&rqst[1]);
2725 }
2726
2727 rqst[2].rq_iov = &vars->close_iov;
2728 rqst[2].rq_nvec = 1;
2729
2730 rc = SMB2_close_init(tcon, server,
2731 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2732 if (rc)
2733 goto qic_exit;
2734 smb2_set_related(&rqst[2]);
2735
2736 if (retries) {
2737 if (!cfid) {
2738 smb2_set_replay(server, &rqst[0]);
2739 smb2_set_replay(server, &rqst[2]);
2740 }
2741 smb2_set_replay(server, &rqst[1]);
2742 }
2743
2744 if (cfid) {
2745 rc = compound_send_recv(xid, ses, server,
2746 flags, 1, &rqst[1],
2747 &resp_buftype[1], &rsp_iov[1]);
2748 } else {
2749 rc = compound_send_recv(xid, ses, server,
2750 flags, 3, rqst,
2751 resp_buftype, rsp_iov);
2752 }
2753 if (rc) {
2754 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2755 if (rc == -EREMCHG) {
2756 tcon->need_reconnect = true;
2757 pr_warn_once("server share %s deleted\n",
2758 tcon->tree_name);
2759 }
2760 goto qic_exit;
2761 }
2762 *rsp = rsp_iov[1];
2763 *buftype = resp_buftype[1];
2764
2765 qic_exit:
2766 SMB2_open_free(&rqst[0]);
2767 SMB2_query_info_free(&rqst[1]);
2768 SMB2_close_free(&rqst[2]);
2769 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2770 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2771 if (cfid)
2772 close_cached_dir(cfid);
2773 kfree(vars);
2774 out_free_path:
2775 kfree(utf16_path);
2776
2777 if (is_replayable_error(rc) &&
2778 smb2_should_replay(tcon, &retries, &cur_sleep))
2779 goto replay_again;
2780
2781 return rc;
2782 }
2783
2784 static int
smb2_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2785 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2786 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2787 {
2788 struct smb2_query_info_rsp *rsp;
2789 struct smb2_fs_full_size_info *info = NULL;
2790 struct kvec rsp_iov = {NULL, 0};
2791 int buftype = CIFS_NO_BUFFER;
2792 int rc;
2793
2794
2795 rc = smb2_query_info_compound(xid, tcon, "",
2796 FILE_READ_ATTRIBUTES,
2797 FS_FULL_SIZE_INFORMATION,
2798 SMB2_O_INFO_FILESYSTEM,
2799 sizeof(struct smb2_fs_full_size_info),
2800 &rsp_iov, &buftype, cifs_sb);
2801 if (rc)
2802 goto qfs_exit;
2803
2804 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2805 buf->f_type = SMB2_SUPER_MAGIC;
2806 info = (struct smb2_fs_full_size_info *)(
2807 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2808 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2809 le32_to_cpu(rsp->OutputBufferLength),
2810 &rsp_iov,
2811 sizeof(struct smb2_fs_full_size_info));
2812 if (!rc)
2813 smb2_copy_fs_info_to_kstatfs(info, buf);
2814
2815 qfs_exit:
2816 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2817 free_rsp_buf(buftype, rsp_iov.iov_base);
2818 return rc;
2819 }
2820
2821 static int
smb311_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2822 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2823 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2824 {
2825 int rc;
2826 __le16 srch_path = 0; /* Null - open root of share */
2827 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2828 struct cifs_open_parms oparms;
2829 struct cifs_fid fid;
2830
2831 if (!tcon->posix_extensions)
2832 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2833
2834 oparms = (struct cifs_open_parms) {
2835 .tcon = tcon,
2836 .path = "",
2837 .desired_access = FILE_READ_ATTRIBUTES,
2838 .disposition = FILE_OPEN,
2839 .create_options = cifs_create_options(cifs_sb, 0),
2840 .fid = &fid,
2841 };
2842
2843 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2844 NULL, NULL);
2845 if (rc)
2846 return rc;
2847
2848 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2849 fid.volatile_fid, buf);
2850 buf->f_type = SMB2_SUPER_MAGIC;
2851 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2852 return rc;
2853 }
2854
2855 static bool
smb2_compare_fids(struct cifsFileInfo * ob1,struct cifsFileInfo * ob2)2856 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2857 {
2858 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2859 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2860 }
2861
2862 static int
smb2_mand_lock(const unsigned int xid,struct cifsFileInfo * cfile,__u64 offset,__u64 length,__u32 type,int lock,int unlock,bool wait)2863 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2864 __u64 length, __u32 type, int lock, int unlock, bool wait)
2865 {
2866 if (unlock && !lock)
2867 type = SMB2_LOCKFLAG_UNLOCK;
2868 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2869 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2870 current->tgid, length, offset, type, wait);
2871 }
2872
2873 static void
smb2_get_lease_key(struct inode * inode,struct cifs_fid * fid)2874 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2875 {
2876 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2877 }
2878
2879 static void
smb2_set_lease_key(struct inode * inode,struct cifs_fid * fid)2880 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2881 {
2882 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2883 }
2884
2885 static void
smb2_new_lease_key(struct cifs_fid * fid)2886 smb2_new_lease_key(struct cifs_fid *fid)
2887 {
2888 generate_random_uuid(fid->lease_key);
2889 }
2890
2891 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)2892 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2893 const char *search_name,
2894 struct dfs_info3_param **target_nodes,
2895 unsigned int *num_of_nodes,
2896 const struct nls_table *nls_codepage, int remap)
2897 {
2898 int rc;
2899 __le16 *utf16_path = NULL;
2900 int utf16_path_len = 0;
2901 struct cifs_tcon *tcon;
2902 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2903 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2904 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2905 int retry_count = 0;
2906
2907 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2908
2909 /*
2910 * Try to use the IPC tcon, otherwise just use any
2911 */
2912 tcon = ses->tcon_ipc;
2913 if (tcon == NULL) {
2914 spin_lock(&cifs_tcp_ses_lock);
2915 tcon = list_first_entry_or_null(&ses->tcon_list,
2916 struct cifs_tcon,
2917 tcon_list);
2918 if (tcon) {
2919 tcon->tc_count++;
2920 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count,
2921 netfs_trace_tcon_ref_get_dfs_refer);
2922 }
2923 spin_unlock(&cifs_tcp_ses_lock);
2924 }
2925
2926 if (tcon == NULL) {
2927 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2928 ses);
2929 rc = -ENOTCONN;
2930 goto out;
2931 }
2932
2933 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2934 &utf16_path_len,
2935 nls_codepage, remap);
2936 if (!utf16_path) {
2937 rc = -ENOMEM;
2938 goto out;
2939 }
2940
2941 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2942 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2943 if (!dfs_req) {
2944 rc = -ENOMEM;
2945 goto out;
2946 }
2947
2948 /* Highest DFS referral version understood */
2949 dfs_req->MaxReferralLevel = DFS_VERSION;
2950
2951 /* Path to resolve in an UTF-16 null-terminated string */
2952 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2953
2954 do {
2955 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2956 FSCTL_DFS_GET_REFERRALS,
2957 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2958 (char **)&dfs_rsp, &dfs_rsp_size);
2959 if (!is_retryable_error(rc))
2960 break;
2961 usleep_range(512, 2048);
2962 } while (++retry_count < 5);
2963
2964 if (!rc && !dfs_rsp)
2965 rc = -EIO;
2966 if (rc) {
2967 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2968 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2969 goto out;
2970 }
2971
2972 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2973 num_of_nodes, target_nodes,
2974 nls_codepage, remap, search_name,
2975 true /* is_unicode */);
2976 if (rc) {
2977 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2978 goto out;
2979 }
2980
2981 out:
2982 if (tcon && !tcon->ipc) {
2983 /* ipc tcons are not refcounted */
2984 spin_lock(&cifs_tcp_ses_lock);
2985 tcon->tc_count--;
2986 trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count,
2987 netfs_trace_tcon_ref_dec_dfs_refer);
2988 /* tc_count can never go negative */
2989 WARN_ON(tcon->tc_count < 0);
2990 spin_unlock(&cifs_tcp_ses_lock);
2991 }
2992 kfree(utf16_path);
2993 kfree(dfs_req);
2994 kfree(dfs_rsp);
2995 return rc;
2996 }
2997
2998 static struct cifs_ntsd *
get_smb2_acl_by_fid(struct cifs_sb_info * cifs_sb,const struct cifs_fid * cifsfid,u32 * pacllen,u32 info)2999 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3000 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3001 {
3002 struct cifs_ntsd *pntsd = NULL;
3003 unsigned int xid;
3004 int rc = -EOPNOTSUPP;
3005 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3006
3007 if (IS_ERR(tlink))
3008 return ERR_CAST(tlink);
3009
3010 xid = get_xid();
3011 cifs_dbg(FYI, "trying to get acl\n");
3012
3013 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3014 cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3015 info);
3016 free_xid(xid);
3017
3018 cifs_put_tlink(tlink);
3019
3020 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3021 if (rc)
3022 return ERR_PTR(rc);
3023 return pntsd;
3024
3025 }
3026
3027 static struct cifs_ntsd *
get_smb2_acl_by_path(struct cifs_sb_info * cifs_sb,const char * path,u32 * pacllen,u32 info)3028 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3029 const char *path, u32 *pacllen, u32 info)
3030 {
3031 struct cifs_ntsd *pntsd = NULL;
3032 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3033 unsigned int xid;
3034 int rc;
3035 struct cifs_tcon *tcon;
3036 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3037 struct cifs_fid fid;
3038 struct cifs_open_parms oparms;
3039 __le16 *utf16_path;
3040
3041 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3042 if (IS_ERR(tlink))
3043 return ERR_CAST(tlink);
3044
3045 tcon = tlink_tcon(tlink);
3046 xid = get_xid();
3047
3048 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3049 if (!utf16_path) {
3050 rc = -ENOMEM;
3051 free_xid(xid);
3052 return ERR_PTR(rc);
3053 }
3054
3055 oparms = (struct cifs_open_parms) {
3056 .tcon = tcon,
3057 .path = path,
3058 .desired_access = READ_CONTROL,
3059 .disposition = FILE_OPEN,
3060 /*
3061 * When querying an ACL, even if the file is a symlink
3062 * we want to open the source not the target, and so
3063 * the protocol requires that the client specify this
3064 * flag when opening a reparse point
3065 */
3066 .create_options = cifs_create_options(cifs_sb, 0) |
3067 OPEN_REPARSE_POINT,
3068 .fid = &fid,
3069 };
3070
3071 if (info & SACL_SECINFO)
3072 oparms.desired_access |= SYSTEM_SECURITY;
3073
3074 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3075 NULL);
3076 kfree(utf16_path);
3077 if (!rc) {
3078 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3079 fid.volatile_fid, (void **)&pntsd, pacllen,
3080 info);
3081 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3082 }
3083
3084 cifs_put_tlink(tlink);
3085 free_xid(xid);
3086
3087 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3088 if (rc)
3089 return ERR_PTR(rc);
3090 return pntsd;
3091 }
3092
3093 static int
set_smb2_acl(struct cifs_ntsd * pnntsd,__u32 acllen,struct inode * inode,const char * path,int aclflag)3094 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3095 struct inode *inode, const char *path, int aclflag)
3096 {
3097 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3098 unsigned int xid;
3099 int rc, access_flags = 0;
3100 struct cifs_tcon *tcon;
3101 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3102 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3103 struct cifs_fid fid;
3104 struct cifs_open_parms oparms;
3105 __le16 *utf16_path;
3106
3107 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3108 if (IS_ERR(tlink))
3109 return PTR_ERR(tlink);
3110
3111 tcon = tlink_tcon(tlink);
3112 xid = get_xid();
3113
3114 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3115 access_flags |= WRITE_OWNER;
3116 if (aclflag & CIFS_ACL_SACL)
3117 access_flags |= SYSTEM_SECURITY;
3118 if (aclflag & CIFS_ACL_DACL)
3119 access_flags |= WRITE_DAC;
3120
3121 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3122 if (!utf16_path) {
3123 rc = -ENOMEM;
3124 free_xid(xid);
3125 return rc;
3126 }
3127
3128 oparms = (struct cifs_open_parms) {
3129 .tcon = tcon,
3130 .desired_access = access_flags,
3131 .create_options = cifs_create_options(cifs_sb, 0),
3132 .disposition = FILE_OPEN,
3133 .path = path,
3134 .fid = &fid,
3135 };
3136
3137 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3138 NULL, NULL);
3139 kfree(utf16_path);
3140 if (!rc) {
3141 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3142 fid.volatile_fid, pnntsd, acllen, aclflag);
3143 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3144 }
3145
3146 cifs_put_tlink(tlink);
3147 free_xid(xid);
3148 return rc;
3149 }
3150
3151 /* Retrieve an ACL from the server */
3152 static struct cifs_ntsd *
get_smb2_acl(struct cifs_sb_info * cifs_sb,struct inode * inode,const char * path,u32 * pacllen,u32 info)3153 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3154 struct inode *inode, const char *path,
3155 u32 *pacllen, u32 info)
3156 {
3157 struct cifs_ntsd *pntsd = NULL;
3158 struct cifsFileInfo *open_file = NULL;
3159
3160 if (inode && !(info & SACL_SECINFO))
3161 open_file = find_readable_file(CIFS_I(inode), true);
3162 if (!open_file || (info & SACL_SECINFO))
3163 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3164
3165 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3166 cifsFileInfo_put(open_file);
3167 return pntsd;
3168 }
3169
smb3_zero_data(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len,unsigned int xid)3170 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3171 loff_t offset, loff_t len, unsigned int xid)
3172 {
3173 struct cifsFileInfo *cfile = file->private_data;
3174 struct file_zero_data_information fsctl_buf;
3175
3176 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3177
3178 fsctl_buf.FileOffset = cpu_to_le64(offset);
3179 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3180
3181 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3182 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3183 (char *)&fsctl_buf,
3184 sizeof(struct file_zero_data_information),
3185 0, NULL, NULL);
3186 }
3187
smb3_zero_range(struct file * file,struct cifs_tcon * tcon,unsigned long long offset,unsigned long long len,bool keep_size)3188 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3189 unsigned long long offset, unsigned long long len,
3190 bool keep_size)
3191 {
3192 struct cifs_ses *ses = tcon->ses;
3193 struct inode *inode = file_inode(file);
3194 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3195 struct cifsFileInfo *cfile = file->private_data;
3196 struct netfs_inode *ictx = netfs_inode(inode);
3197 unsigned long long i_size, new_size, remote_size;
3198 long rc;
3199 unsigned int xid;
3200
3201 xid = get_xid();
3202
3203 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3204 ses->Suid, offset, len);
3205
3206 inode_lock(inode);
3207 filemap_invalidate_lock(inode->i_mapping);
3208
3209 i_size = i_size_read(inode);
3210 remote_size = ictx->remote_i_size;
3211 if (offset + len >= remote_size && offset < i_size) {
3212 unsigned long long top = umin(offset + len, i_size);
3213
3214 rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1);
3215 if (rc < 0)
3216 goto zero_range_exit;
3217 }
3218
3219 /*
3220 * We zero the range through ioctl, so we need remove the page caches
3221 * first, otherwise the data may be inconsistent with the server.
3222 */
3223 truncate_pagecache_range(inode, offset, offset + len - 1);
3224
3225 /* if file not oplocked can't be sure whether asking to extend size */
3226 rc = -EOPNOTSUPP;
3227 if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3228 goto zero_range_exit;
3229
3230 rc = smb3_zero_data(file, tcon, offset, len, xid);
3231 if (rc < 0)
3232 goto zero_range_exit;
3233
3234 /*
3235 * do we also need to change the size of the file?
3236 */
3237 new_size = offset + len;
3238 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3239 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3240 cfile->fid.volatile_fid, cfile->pid, new_size);
3241 if (rc >= 0) {
3242 truncate_setsize(inode, new_size);
3243 fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3244 }
3245 }
3246
3247 zero_range_exit:
3248 filemap_invalidate_unlock(inode->i_mapping);
3249 inode_unlock(inode);
3250 free_xid(xid);
3251 if (rc)
3252 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3253 ses->Suid, offset, len, rc);
3254 else
3255 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3256 ses->Suid, offset, len);
3257 return rc;
3258 }
3259
smb3_punch_hole(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len)3260 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3261 loff_t offset, loff_t len)
3262 {
3263 struct inode *inode = file_inode(file);
3264 struct cifsFileInfo *cfile = file->private_data;
3265 struct file_zero_data_information fsctl_buf;
3266 unsigned long long end = offset + len, i_size, remote_i_size;
3267 long rc;
3268 unsigned int xid;
3269 __u8 set_sparse = 1;
3270
3271 xid = get_xid();
3272
3273 inode_lock(inode);
3274 /* Need to make file sparse, if not already, before freeing range. */
3275 /* Consider adding equivalent for compressed since it could also work */
3276 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3277 rc = -EOPNOTSUPP;
3278 goto out;
3279 }
3280
3281 filemap_invalidate_lock(inode->i_mapping);
3282 /*
3283 * We implement the punch hole through ioctl, so we need remove the page
3284 * caches first, otherwise the data may be inconsistent with the server.
3285 */
3286 truncate_pagecache_range(inode, offset, offset + len - 1);
3287
3288 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3289
3290 fsctl_buf.FileOffset = cpu_to_le64(offset);
3291 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3292
3293 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3294 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3295 (char *)&fsctl_buf,
3296 sizeof(struct file_zero_data_information),
3297 CIFSMaxBufSize, NULL, NULL);
3298
3299 if (rc)
3300 goto unlock;
3301
3302 /* If there's dirty data in the buffer that would extend the EOF if it
3303 * were written, then we need to move the EOF marker over to the lower
3304 * of the high end of the hole and the proposed EOF. The problem is
3305 * that we locally hole-punch the tail of the dirty data, the proposed
3306 * EOF update will end up in the wrong place.
3307 */
3308 i_size = i_size_read(inode);
3309 remote_i_size = netfs_inode(inode)->remote_i_size;
3310 if (end > remote_i_size && i_size > remote_i_size) {
3311 unsigned long long extend_to = umin(end, i_size);
3312 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3313 cfile->fid.volatile_fid, cfile->pid, extend_to);
3314 if (rc >= 0)
3315 netfs_inode(inode)->remote_i_size = extend_to;
3316 }
3317
3318 unlock:
3319 filemap_invalidate_unlock(inode->i_mapping);
3320 out:
3321 inode_unlock(inode);
3322 free_xid(xid);
3323 return rc;
3324 }
3325
smb3_simple_fallocate_write_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len,char * buf)3326 static int smb3_simple_fallocate_write_range(unsigned int xid,
3327 struct cifs_tcon *tcon,
3328 struct cifsFileInfo *cfile,
3329 loff_t off, loff_t len,
3330 char *buf)
3331 {
3332 struct cifs_io_parms io_parms = {0};
3333 int nbytes;
3334 int rc = 0;
3335 struct kvec iov[2];
3336
3337 io_parms.netfid = cfile->fid.netfid;
3338 io_parms.pid = current->tgid;
3339 io_parms.tcon = tcon;
3340 io_parms.persistent_fid = cfile->fid.persistent_fid;
3341 io_parms.volatile_fid = cfile->fid.volatile_fid;
3342
3343 while (len) {
3344 io_parms.offset = off;
3345 io_parms.length = len;
3346 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3347 io_parms.length = SMB2_MAX_BUFFER_SIZE;
3348 /* iov[0] is reserved for smb header */
3349 iov[1].iov_base = buf;
3350 iov[1].iov_len = io_parms.length;
3351 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3352 if (rc)
3353 break;
3354 if (nbytes > len)
3355 return -EINVAL;
3356 buf += nbytes;
3357 off += nbytes;
3358 len -= nbytes;
3359 }
3360 return rc;
3361 }
3362
smb3_simple_fallocate_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len)3363 static int smb3_simple_fallocate_range(unsigned int xid,
3364 struct cifs_tcon *tcon,
3365 struct cifsFileInfo *cfile,
3366 loff_t off, loff_t len)
3367 {
3368 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3369 u32 out_data_len;
3370 char *buf = NULL;
3371 loff_t l;
3372 int rc;
3373
3374 in_data.file_offset = cpu_to_le64(off);
3375 in_data.length = cpu_to_le64(len);
3376 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3377 cfile->fid.volatile_fid,
3378 FSCTL_QUERY_ALLOCATED_RANGES,
3379 (char *)&in_data, sizeof(in_data),
3380 1024 * sizeof(struct file_allocated_range_buffer),
3381 (char **)&out_data, &out_data_len);
3382 if (rc)
3383 goto out;
3384
3385 buf = kzalloc(1024 * 1024, GFP_KERNEL);
3386 if (buf == NULL) {
3387 rc = -ENOMEM;
3388 goto out;
3389 }
3390
3391 tmp_data = out_data;
3392 while (len) {
3393 /*
3394 * The rest of the region is unmapped so write it all.
3395 */
3396 if (out_data_len == 0) {
3397 rc = smb3_simple_fallocate_write_range(xid, tcon,
3398 cfile, off, len, buf);
3399 goto out;
3400 }
3401
3402 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3403 rc = -EINVAL;
3404 goto out;
3405 }
3406
3407 if (off < le64_to_cpu(tmp_data->file_offset)) {
3408 /*
3409 * We are at a hole. Write until the end of the region
3410 * or until the next allocated data,
3411 * whichever comes next.
3412 */
3413 l = le64_to_cpu(tmp_data->file_offset) - off;
3414 if (len < l)
3415 l = len;
3416 rc = smb3_simple_fallocate_write_range(xid, tcon,
3417 cfile, off, l, buf);
3418 if (rc)
3419 goto out;
3420 off = off + l;
3421 len = len - l;
3422 if (len == 0)
3423 goto out;
3424 }
3425 /*
3426 * We are at a section of allocated data, just skip forward
3427 * until the end of the data or the end of the region
3428 * we are supposed to fallocate, whichever comes first.
3429 */
3430 l = le64_to_cpu(tmp_data->length);
3431 if (len < l)
3432 l = len;
3433 off += l;
3434 len -= l;
3435
3436 tmp_data = &tmp_data[1];
3437 out_data_len -= sizeof(struct file_allocated_range_buffer);
3438 }
3439
3440 out:
3441 kfree(out_data);
3442 kfree(buf);
3443 return rc;
3444 }
3445
3446
smb3_simple_falloc(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len,bool keep_size)3447 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3448 loff_t off, loff_t len, bool keep_size)
3449 {
3450 struct inode *inode;
3451 struct cifsInodeInfo *cifsi;
3452 struct cifsFileInfo *cfile = file->private_data;
3453 long rc = -EOPNOTSUPP;
3454 unsigned int xid;
3455 loff_t new_eof;
3456
3457 xid = get_xid();
3458
3459 inode = d_inode(cfile->dentry);
3460 cifsi = CIFS_I(inode);
3461
3462 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3463 tcon->ses->Suid, off, len);
3464 /* if file not oplocked can't be sure whether asking to extend size */
3465 if (!CIFS_CACHE_READ(cifsi))
3466 if (keep_size == false) {
3467 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3468 tcon->tid, tcon->ses->Suid, off, len, rc);
3469 free_xid(xid);
3470 return rc;
3471 }
3472
3473 /*
3474 * Extending the file
3475 */
3476 if ((keep_size == false) && i_size_read(inode) < off + len) {
3477 rc = inode_newsize_ok(inode, off + len);
3478 if (rc)
3479 goto out;
3480
3481 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3482 smb2_set_sparse(xid, tcon, cfile, inode, false);
3483
3484 new_eof = off + len;
3485 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3486 cfile->fid.volatile_fid, cfile->pid, new_eof);
3487 if (rc == 0) {
3488 cifsi->server_eof = new_eof;
3489 cifs_setsize(inode, new_eof);
3490 cifs_truncate_page(inode->i_mapping, inode->i_size);
3491 truncate_setsize(inode, new_eof);
3492 }
3493 goto out;
3494 }
3495
3496 /*
3497 * Files are non-sparse by default so falloc may be a no-op
3498 * Must check if file sparse. If not sparse, and since we are not
3499 * extending then no need to do anything since file already allocated
3500 */
3501 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3502 rc = 0;
3503 goto out;
3504 }
3505
3506 if (keep_size == true) {
3507 /*
3508 * We can not preallocate pages beyond the end of the file
3509 * in SMB2
3510 */
3511 if (off >= i_size_read(inode)) {
3512 rc = 0;
3513 goto out;
3514 }
3515 /*
3516 * For fallocates that are partially beyond the end of file,
3517 * clamp len so we only fallocate up to the end of file.
3518 */
3519 if (off + len > i_size_read(inode)) {
3520 len = i_size_read(inode) - off;
3521 }
3522 }
3523
3524 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3525 /*
3526 * At this point, we are trying to fallocate an internal
3527 * regions of a sparse file. Since smb2 does not have a
3528 * fallocate command we have two otions on how to emulate this.
3529 * We can either turn the entire file to become non-sparse
3530 * which we only do if the fallocate is for virtually
3531 * the whole file, or we can overwrite the region with zeroes
3532 * using SMB2_write, which could be prohibitevly expensive
3533 * if len is large.
3534 */
3535 /*
3536 * We are only trying to fallocate a small region so
3537 * just write it with zero.
3538 */
3539 if (len <= 1024 * 1024) {
3540 rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3541 off, len);
3542 goto out;
3543 }
3544
3545 /*
3546 * Check if falloc starts within first few pages of file
3547 * and ends within a few pages of the end of file to
3548 * ensure that most of file is being forced to be
3549 * fallocated now. If so then setting whole file sparse
3550 * ie potentially making a few extra pages at the beginning
3551 * or end of the file non-sparse via set_sparse is harmless.
3552 */
3553 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3554 rc = -EOPNOTSUPP;
3555 goto out;
3556 }
3557 }
3558
3559 smb2_set_sparse(xid, tcon, cfile, inode, false);
3560 rc = 0;
3561
3562 out:
3563 if (rc)
3564 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3565 tcon->ses->Suid, off, len, rc);
3566 else
3567 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3568 tcon->ses->Suid, off, len);
3569
3570 free_xid(xid);
3571 return rc;
3572 }
3573
smb3_collapse_range(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len)3574 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3575 loff_t off, loff_t len)
3576 {
3577 int rc;
3578 unsigned int xid;
3579 struct inode *inode = file_inode(file);
3580 struct cifsFileInfo *cfile = file->private_data;
3581 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3582 loff_t old_eof, new_eof;
3583
3584 xid = get_xid();
3585
3586 inode_lock(inode);
3587
3588 old_eof = i_size_read(inode);
3589 if ((off >= old_eof) ||
3590 off + len >= old_eof) {
3591 rc = -EINVAL;
3592 goto out;
3593 }
3594
3595 filemap_invalidate_lock(inode->i_mapping);
3596 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3597 if (rc < 0)
3598 goto out_2;
3599
3600 truncate_pagecache_range(inode, off, old_eof);
3601
3602 rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3603 old_eof - off - len, off);
3604 if (rc < 0)
3605 goto out_2;
3606
3607 new_eof = old_eof - len;
3608 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3609 cfile->fid.volatile_fid, cfile->pid, new_eof);
3610 if (rc < 0)
3611 goto out_2;
3612
3613 rc = 0;
3614
3615 cifsi->server_eof = i_size_read(inode) - len;
3616 truncate_setsize(inode, cifsi->server_eof);
3617 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3618 out_2:
3619 filemap_invalidate_unlock(inode->i_mapping);
3620 out:
3621 inode_unlock(inode);
3622 free_xid(xid);
3623 return rc;
3624 }
3625
smb3_insert_range(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len)3626 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3627 loff_t off, loff_t len)
3628 {
3629 int rc;
3630 unsigned int xid;
3631 struct cifsFileInfo *cfile = file->private_data;
3632 struct inode *inode = file_inode(file);
3633 __u64 count, old_eof, new_eof;
3634
3635 xid = get_xid();
3636
3637 inode_lock(inode);
3638
3639 old_eof = i_size_read(inode);
3640 if (off >= old_eof) {
3641 rc = -EINVAL;
3642 goto out;
3643 }
3644
3645 count = old_eof - off;
3646 new_eof = old_eof + len;
3647
3648 filemap_invalidate_lock(inode->i_mapping);
3649 rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1);
3650 if (rc < 0)
3651 goto out_2;
3652 truncate_pagecache_range(inode, off, old_eof);
3653
3654 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3655 cfile->fid.volatile_fid, cfile->pid, new_eof);
3656 if (rc < 0)
3657 goto out_2;
3658
3659 truncate_setsize(inode, new_eof);
3660 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3661
3662 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3663 if (rc < 0)
3664 goto out_2;
3665
3666 rc = smb3_zero_data(file, tcon, off, len, xid);
3667 if (rc < 0)
3668 goto out_2;
3669
3670 rc = 0;
3671 out_2:
3672 filemap_invalidate_unlock(inode->i_mapping);
3673 out:
3674 inode_unlock(inode);
3675 free_xid(xid);
3676 return rc;
3677 }
3678
smb3_llseek(struct file * file,struct cifs_tcon * tcon,loff_t offset,int whence)3679 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3680 {
3681 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3682 struct cifsInodeInfo *cifsi;
3683 struct inode *inode;
3684 int rc = 0;
3685 struct file_allocated_range_buffer in_data, *out_data = NULL;
3686 u32 out_data_len;
3687 unsigned int xid;
3688
3689 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3690 return generic_file_llseek(file, offset, whence);
3691
3692 inode = d_inode(cfile->dentry);
3693 cifsi = CIFS_I(inode);
3694
3695 if (offset < 0 || offset >= i_size_read(inode))
3696 return -ENXIO;
3697
3698 xid = get_xid();
3699 /*
3700 * We need to be sure that all dirty pages are written as they
3701 * might fill holes on the server.
3702 * Note that we also MUST flush any written pages since at least
3703 * some servers (Windows2016) will not reflect recent writes in
3704 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3705 */
3706 wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3707 if (wrcfile) {
3708 filemap_write_and_wait(inode->i_mapping);
3709 smb2_flush_file(xid, tcon, &wrcfile->fid);
3710 cifsFileInfo_put(wrcfile);
3711 }
3712
3713 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3714 if (whence == SEEK_HOLE)
3715 offset = i_size_read(inode);
3716 goto lseek_exit;
3717 }
3718
3719 in_data.file_offset = cpu_to_le64(offset);
3720 in_data.length = cpu_to_le64(i_size_read(inode));
3721
3722 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3723 cfile->fid.volatile_fid,
3724 FSCTL_QUERY_ALLOCATED_RANGES,
3725 (char *)&in_data, sizeof(in_data),
3726 sizeof(struct file_allocated_range_buffer),
3727 (char **)&out_data, &out_data_len);
3728 if (rc == -E2BIG)
3729 rc = 0;
3730 if (rc)
3731 goto lseek_exit;
3732
3733 if (whence == SEEK_HOLE && out_data_len == 0)
3734 goto lseek_exit;
3735
3736 if (whence == SEEK_DATA && out_data_len == 0) {
3737 rc = -ENXIO;
3738 goto lseek_exit;
3739 }
3740
3741 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3742 rc = -EINVAL;
3743 goto lseek_exit;
3744 }
3745 if (whence == SEEK_DATA) {
3746 offset = le64_to_cpu(out_data->file_offset);
3747 goto lseek_exit;
3748 }
3749 if (offset < le64_to_cpu(out_data->file_offset))
3750 goto lseek_exit;
3751
3752 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3753
3754 lseek_exit:
3755 free_xid(xid);
3756 kfree(out_data);
3757 if (!rc)
3758 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3759 else
3760 return rc;
3761 }
3762
smb3_fiemap(struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct fiemap_extent_info * fei,u64 start,u64 len)3763 static int smb3_fiemap(struct cifs_tcon *tcon,
3764 struct cifsFileInfo *cfile,
3765 struct fiemap_extent_info *fei, u64 start, u64 len)
3766 {
3767 unsigned int xid;
3768 struct file_allocated_range_buffer in_data, *out_data;
3769 u32 out_data_len;
3770 int i, num, rc, flags, last_blob;
3771 u64 next;
3772
3773 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3774 if (rc)
3775 return rc;
3776
3777 xid = get_xid();
3778 again:
3779 in_data.file_offset = cpu_to_le64(start);
3780 in_data.length = cpu_to_le64(len);
3781
3782 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3783 cfile->fid.volatile_fid,
3784 FSCTL_QUERY_ALLOCATED_RANGES,
3785 (char *)&in_data, sizeof(in_data),
3786 1024 * sizeof(struct file_allocated_range_buffer),
3787 (char **)&out_data, &out_data_len);
3788 if (rc == -E2BIG) {
3789 last_blob = 0;
3790 rc = 0;
3791 } else
3792 last_blob = 1;
3793 if (rc)
3794 goto out;
3795
3796 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3797 rc = -EINVAL;
3798 goto out;
3799 }
3800 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3801 rc = -EINVAL;
3802 goto out;
3803 }
3804
3805 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3806 for (i = 0; i < num; i++) {
3807 flags = 0;
3808 if (i == num - 1 && last_blob)
3809 flags |= FIEMAP_EXTENT_LAST;
3810
3811 rc = fiemap_fill_next_extent(fei,
3812 le64_to_cpu(out_data[i].file_offset),
3813 le64_to_cpu(out_data[i].file_offset),
3814 le64_to_cpu(out_data[i].length),
3815 flags);
3816 if (rc < 0)
3817 goto out;
3818 if (rc == 1) {
3819 rc = 0;
3820 goto out;
3821 }
3822 }
3823
3824 if (!last_blob) {
3825 next = le64_to_cpu(out_data[num - 1].file_offset) +
3826 le64_to_cpu(out_data[num - 1].length);
3827 len = len - (next - start);
3828 start = next;
3829 goto again;
3830 }
3831
3832 out:
3833 free_xid(xid);
3834 kfree(out_data);
3835 return rc;
3836 }
3837
smb3_fallocate(struct file * file,struct cifs_tcon * tcon,int mode,loff_t off,loff_t len)3838 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3839 loff_t off, loff_t len)
3840 {
3841 /* KEEP_SIZE already checked for by do_fallocate */
3842 if (mode & FALLOC_FL_PUNCH_HOLE)
3843 return smb3_punch_hole(file, tcon, off, len);
3844 else if (mode & FALLOC_FL_ZERO_RANGE) {
3845 if (mode & FALLOC_FL_KEEP_SIZE)
3846 return smb3_zero_range(file, tcon, off, len, true);
3847 return smb3_zero_range(file, tcon, off, len, false);
3848 } else if (mode == FALLOC_FL_KEEP_SIZE)
3849 return smb3_simple_falloc(file, tcon, off, len, true);
3850 else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3851 return smb3_collapse_range(file, tcon, off, len);
3852 else if (mode == FALLOC_FL_INSERT_RANGE)
3853 return smb3_insert_range(file, tcon, off, len);
3854 else if (mode == 0)
3855 return smb3_simple_falloc(file, tcon, off, len, false);
3856
3857 return -EOPNOTSUPP;
3858 }
3859
3860 static void
smb2_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3861 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3862 struct cifsInodeInfo *cinode, __u32 oplock,
3863 unsigned int epoch, bool *purge_cache)
3864 {
3865 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3866 }
3867
3868 static void
3869 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3870 unsigned int epoch, bool *purge_cache);
3871
3872 static void
smb3_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3873 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3874 struct cifsInodeInfo *cinode, __u32 oplock,
3875 unsigned int epoch, bool *purge_cache)
3876 {
3877 unsigned int old_state = cinode->oplock;
3878 unsigned int old_epoch = cinode->epoch;
3879 unsigned int new_state;
3880
3881 if (epoch > old_epoch) {
3882 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3883 cinode->epoch = epoch;
3884 }
3885
3886 new_state = cinode->oplock;
3887 *purge_cache = false;
3888
3889 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3890 (new_state & CIFS_CACHE_READ_FLG) == 0)
3891 *purge_cache = true;
3892 else if (old_state == new_state && (epoch - old_epoch > 1))
3893 *purge_cache = true;
3894 }
3895
3896 static void
smb2_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3897 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3898 unsigned int epoch, bool *purge_cache)
3899 {
3900 oplock &= 0xFF;
3901 cinode->lease_granted = false;
3902 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3903 return;
3904 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3905 cinode->oplock = CIFS_CACHE_RHW_FLG;
3906 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3907 &cinode->netfs.inode);
3908 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3909 cinode->oplock = CIFS_CACHE_RW_FLG;
3910 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3911 &cinode->netfs.inode);
3912 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3913 cinode->oplock = CIFS_CACHE_READ_FLG;
3914 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3915 &cinode->netfs.inode);
3916 } else
3917 cinode->oplock = 0;
3918 }
3919
3920 static void
smb21_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3921 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3922 unsigned int epoch, bool *purge_cache)
3923 {
3924 char message[5] = {0};
3925 unsigned int new_oplock = 0;
3926
3927 oplock &= 0xFF;
3928 cinode->lease_granted = true;
3929 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3930 return;
3931
3932 /* Check if the server granted an oplock rather than a lease */
3933 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3934 return smb2_set_oplock_level(cinode, oplock, epoch,
3935 purge_cache);
3936
3937 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3938 new_oplock |= CIFS_CACHE_READ_FLG;
3939 strcat(message, "R");
3940 }
3941 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3942 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3943 strcat(message, "H");
3944 }
3945 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3946 new_oplock |= CIFS_CACHE_WRITE_FLG;
3947 strcat(message, "W");
3948 }
3949 if (!new_oplock)
3950 strncpy(message, "None", sizeof(message));
3951
3952 cinode->oplock = new_oplock;
3953 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3954 &cinode->netfs.inode);
3955 }
3956
3957 static void
smb3_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3958 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3959 unsigned int epoch, bool *purge_cache)
3960 {
3961 unsigned int old_oplock = cinode->oplock;
3962
3963 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3964
3965 if (purge_cache) {
3966 *purge_cache = false;
3967 if (old_oplock == CIFS_CACHE_READ_FLG) {
3968 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3969 (epoch - cinode->epoch > 0))
3970 *purge_cache = true;
3971 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3972 (epoch - cinode->epoch > 1))
3973 *purge_cache = true;
3974 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3975 (epoch - cinode->epoch > 1))
3976 *purge_cache = true;
3977 else if (cinode->oplock == 0 &&
3978 (epoch - cinode->epoch > 0))
3979 *purge_cache = true;
3980 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3981 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3982 (epoch - cinode->epoch > 0))
3983 *purge_cache = true;
3984 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3985 (epoch - cinode->epoch > 1))
3986 *purge_cache = true;
3987 }
3988 cinode->epoch = epoch;
3989 }
3990 }
3991
3992 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
3993 static bool
smb2_is_read_op(__u32 oplock)3994 smb2_is_read_op(__u32 oplock)
3995 {
3996 return oplock == SMB2_OPLOCK_LEVEL_II;
3997 }
3998 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
3999
4000 static bool
smb21_is_read_op(__u32 oplock)4001 smb21_is_read_op(__u32 oplock)
4002 {
4003 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4004 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4005 }
4006
4007 static __le32
map_oplock_to_lease(u8 oplock)4008 map_oplock_to_lease(u8 oplock)
4009 {
4010 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4011 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4012 else if (oplock == SMB2_OPLOCK_LEVEL_II)
4013 return SMB2_LEASE_READ_CACHING_LE;
4014 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4015 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4016 SMB2_LEASE_WRITE_CACHING_LE;
4017 return 0;
4018 }
4019
4020 static char *
smb2_create_lease_buf(u8 * lease_key,u8 oplock)4021 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4022 {
4023 struct create_lease *buf;
4024
4025 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4026 if (!buf)
4027 return NULL;
4028
4029 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4030 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4031
4032 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4033 (struct create_lease, lcontext));
4034 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4035 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4036 (struct create_lease, Name));
4037 buf->ccontext.NameLength = cpu_to_le16(4);
4038 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4039 buf->Name[0] = 'R';
4040 buf->Name[1] = 'q';
4041 buf->Name[2] = 'L';
4042 buf->Name[3] = 's';
4043 return (char *)buf;
4044 }
4045
4046 static char *
smb3_create_lease_buf(u8 * lease_key,u8 oplock)4047 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4048 {
4049 struct create_lease_v2 *buf;
4050
4051 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4052 if (!buf)
4053 return NULL;
4054
4055 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4056 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4057
4058 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4059 (struct create_lease_v2, lcontext));
4060 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4061 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4062 (struct create_lease_v2, Name));
4063 buf->ccontext.NameLength = cpu_to_le16(4);
4064 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4065 buf->Name[0] = 'R';
4066 buf->Name[1] = 'q';
4067 buf->Name[2] = 'L';
4068 buf->Name[3] = 's';
4069 return (char *)buf;
4070 }
4071
4072 static __u8
smb2_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4073 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4074 {
4075 struct create_lease *lc = (struct create_lease *)buf;
4076
4077 *epoch = 0; /* not used */
4078 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4079 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4080 return le32_to_cpu(lc->lcontext.LeaseState);
4081 }
4082
4083 static __u8
smb3_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4084 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4085 {
4086 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4087
4088 *epoch = le16_to_cpu(lc->lcontext.Epoch);
4089 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4090 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4091 if (lease_key)
4092 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4093 return le32_to_cpu(lc->lcontext.LeaseState);
4094 }
4095
4096 static unsigned int
smb2_wp_retry_size(struct inode * inode)4097 smb2_wp_retry_size(struct inode *inode)
4098 {
4099 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4100 SMB2_MAX_BUFFER_SIZE);
4101 }
4102
4103 static bool
smb2_dir_needs_close(struct cifsFileInfo * cfile)4104 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4105 {
4106 return !cfile->invalidHandle;
4107 }
4108
4109 static void
fill_transform_hdr(struct smb2_transform_hdr * tr_hdr,unsigned int orig_len,struct smb_rqst * old_rq,__le16 cipher_type)4110 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4111 struct smb_rqst *old_rq, __le16 cipher_type)
4112 {
4113 struct smb2_hdr *shdr =
4114 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4115
4116 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4117 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4118 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4119 tr_hdr->Flags = cpu_to_le16(0x01);
4120 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4121 (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4122 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4123 else
4124 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4125 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4126 }
4127
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)4128 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4129 int num_rqst, const u8 *sig, u8 **iv,
4130 struct aead_request **req, struct sg_table *sgt,
4131 unsigned int *num_sgs, size_t *sensitive_size)
4132 {
4133 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4134 unsigned int iv_size = crypto_aead_ivsize(tfm);
4135 unsigned int len;
4136 u8 *p;
4137
4138 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4139 if (IS_ERR_VALUE((long)(int)*num_sgs))
4140 return ERR_PTR(*num_sgs);
4141
4142 len = iv_size;
4143 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4144 len = ALIGN(len, crypto_tfm_ctx_alignment());
4145 len += req_size;
4146 len = ALIGN(len, __alignof__(struct scatterlist));
4147 len += array_size(*num_sgs, sizeof(struct scatterlist));
4148 *sensitive_size = len;
4149
4150 p = kvzalloc(len, GFP_NOFS);
4151 if (!p)
4152 return ERR_PTR(-ENOMEM);
4153
4154 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4155 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4156 crypto_tfm_ctx_alignment());
4157 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4158 __alignof__(struct scatterlist));
4159 return p;
4160 }
4161
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)4162 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4163 int num_rqst, const u8 *sig, u8 **iv,
4164 struct aead_request **req, struct scatterlist **sgl,
4165 size_t *sensitive_size)
4166 {
4167 struct sg_table sgtable = {};
4168 unsigned int skip, num_sgs, i, j;
4169 ssize_t rc;
4170 void *p;
4171
4172 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4173 &num_sgs, sensitive_size);
4174 if (IS_ERR(p))
4175 return ERR_CAST(p);
4176
4177 sg_init_marker(sgtable.sgl, num_sgs);
4178
4179 /*
4180 * The first rqst has a transform header where the
4181 * first 20 bytes are not part of the encrypted blob.
4182 */
4183 skip = 20;
4184
4185 for (i = 0; i < num_rqst; i++) {
4186 struct iov_iter *iter = &rqst[i].rq_iter;
4187 size_t count = iov_iter_count(iter);
4188
4189 for (j = 0; j < rqst[i].rq_nvec; j++) {
4190 cifs_sg_set_buf(&sgtable,
4191 rqst[i].rq_iov[j].iov_base + skip,
4192 rqst[i].rq_iov[j].iov_len - skip);
4193
4194 /* See the above comment on the 'skip' assignment */
4195 skip = 0;
4196 }
4197 sgtable.orig_nents = sgtable.nents;
4198
4199 rc = extract_iter_to_sg(iter, count, &sgtable,
4200 num_sgs - sgtable.nents, 0);
4201 iov_iter_revert(iter, rc);
4202 sgtable.orig_nents = sgtable.nents;
4203 }
4204
4205 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4206 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4207 *sgl = sgtable.sgl;
4208 return p;
4209 }
4210
4211 static int
smb2_get_enc_key(struct TCP_Server_Info * server,__u64 ses_id,int enc,u8 * key)4212 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4213 {
4214 struct TCP_Server_Info *pserver;
4215 struct cifs_ses *ses;
4216 u8 *ses_enc_key;
4217
4218 /* If server is a channel, select the primary channel */
4219 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4220
4221 spin_lock(&cifs_tcp_ses_lock);
4222 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4223 if (ses->Suid == ses_id) {
4224 spin_lock(&ses->ses_lock);
4225 ses_enc_key = enc ? ses->smb3encryptionkey :
4226 ses->smb3decryptionkey;
4227 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4228 spin_unlock(&ses->ses_lock);
4229 spin_unlock(&cifs_tcp_ses_lock);
4230 return 0;
4231 }
4232 }
4233 spin_unlock(&cifs_tcp_ses_lock);
4234
4235 trace_smb3_ses_not_found(ses_id);
4236
4237 return -EAGAIN;
4238 }
4239 /*
4240 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4241 * iov[0] - transform header (associate data),
4242 * iov[1-N] - SMB2 header and pages - data to encrypt.
4243 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4244 * untouched.
4245 */
4246 static int
crypt_message(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * rqst,int enc)4247 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4248 struct smb_rqst *rqst, int enc)
4249 {
4250 struct smb2_transform_hdr *tr_hdr =
4251 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4252 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4253 int rc = 0;
4254 struct scatterlist *sg;
4255 u8 sign[SMB2_SIGNATURE_SIZE] = {};
4256 u8 key[SMB3_ENC_DEC_KEY_SIZE];
4257 struct aead_request *req;
4258 u8 *iv;
4259 DECLARE_CRYPTO_WAIT(wait);
4260 struct crypto_aead *tfm;
4261 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4262 void *creq;
4263 size_t sensitive_size;
4264
4265 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4266 if (rc) {
4267 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4268 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4269 return rc;
4270 }
4271
4272 rc = smb3_crypto_aead_allocate(server);
4273 if (rc) {
4274 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4275 return rc;
4276 }
4277
4278 tfm = enc ? server->secmech.enc : server->secmech.dec;
4279
4280 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4281 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4282 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4283 else
4284 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4285
4286 if (rc) {
4287 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4288 return rc;
4289 }
4290
4291 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4292 if (rc) {
4293 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4294 return rc;
4295 }
4296
4297 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4298 &sensitive_size);
4299 if (IS_ERR(creq))
4300 return PTR_ERR(creq);
4301
4302 if (!enc) {
4303 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4304 crypt_len += SMB2_SIGNATURE_SIZE;
4305 }
4306
4307 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4308 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4309 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4310 else {
4311 iv[0] = 3;
4312 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4313 }
4314
4315 aead_request_set_tfm(req, tfm);
4316 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4317 aead_request_set_ad(req, assoc_data_len);
4318
4319 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4320 crypto_req_done, &wait);
4321
4322 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4323 : crypto_aead_decrypt(req), &wait);
4324
4325 if (!rc && enc)
4326 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4327
4328 kvfree_sensitive(creq, sensitive_size);
4329 return rc;
4330 }
4331
4332 /*
4333 * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4334 */
cifs_clear_xarray_buffer(struct xarray * buffer)4335 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4336 {
4337 struct folio *folio;
4338
4339 XA_STATE(xas, buffer, 0);
4340
4341 rcu_read_lock();
4342 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4343 folio_put(folio);
4344 }
4345 rcu_read_unlock();
4346 xa_destroy(buffer);
4347 }
4348
4349 void
smb3_free_compound_rqst(int num_rqst,struct smb_rqst * rqst)4350 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4351 {
4352 int i;
4353
4354 for (i = 0; i < num_rqst; i++)
4355 if (!xa_empty(&rqst[i].rq_buffer))
4356 cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4357 }
4358
4359 /*
4360 * This function will initialize new_rq and encrypt the content.
4361 * The first entry, new_rq[0], only contains a single iov which contains
4362 * a smb2_transform_hdr and is pre-allocated by the caller.
4363 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4364 *
4365 * The end result is an array of smb_rqst structures where the first structure
4366 * only contains a single iov for the transform header which we then can pass
4367 * to crypt_message().
4368 *
4369 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4370 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4371 */
4372 static int
smb3_init_transform_rq(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * new_rq,struct smb_rqst * old_rq)4373 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4374 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4375 {
4376 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4377 struct page *page;
4378 unsigned int orig_len = 0;
4379 int i, j;
4380 int rc = -ENOMEM;
4381
4382 for (i = 1; i < num_rqst; i++) {
4383 struct smb_rqst *old = &old_rq[i - 1];
4384 struct smb_rqst *new = &new_rq[i];
4385 struct xarray *buffer = &new->rq_buffer;
4386 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4387
4388 orig_len += smb_rqst_len(server, old);
4389 new->rq_iov = old->rq_iov;
4390 new->rq_nvec = old->rq_nvec;
4391
4392 xa_init(buffer);
4393
4394 if (size > 0) {
4395 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4396
4397 for (j = 0; j < npages; j++) {
4398 void *o;
4399
4400 rc = -ENOMEM;
4401 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4402 if (!page)
4403 goto err_free;
4404 page->index = j;
4405 o = xa_store(buffer, j, page, GFP_KERNEL);
4406 if (xa_is_err(o)) {
4407 rc = xa_err(o);
4408 put_page(page);
4409 goto err_free;
4410 }
4411
4412 xa_set_mark(buffer, j, XA_MARK_0);
4413
4414 seg = min_t(size_t, size - copied, PAGE_SIZE);
4415 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4416 rc = -EFAULT;
4417 goto err_free;
4418 }
4419 copied += seg;
4420 }
4421 iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4422 buffer, 0, size);
4423 new->rq_iter_size = size;
4424 }
4425 }
4426
4427 /* fill the 1st iov with a transform header */
4428 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4429
4430 rc = crypt_message(server, num_rqst, new_rq, 1);
4431 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4432 if (rc)
4433 goto err_free;
4434
4435 return rc;
4436
4437 err_free:
4438 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4439 return rc;
4440 }
4441
4442 static int
smb3_is_transform_hdr(void * buf)4443 smb3_is_transform_hdr(void *buf)
4444 {
4445 struct smb2_transform_hdr *trhdr = buf;
4446
4447 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4448 }
4449
4450 static int
decrypt_raw_data(struct TCP_Server_Info * server,char * buf,unsigned int buf_data_size,struct iov_iter * iter,bool is_offloaded)4451 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4452 unsigned int buf_data_size, struct iov_iter *iter,
4453 bool is_offloaded)
4454 {
4455 struct kvec iov[2];
4456 struct smb_rqst rqst = {NULL};
4457 size_t iter_size = 0;
4458 int rc;
4459
4460 iov[0].iov_base = buf;
4461 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4462 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4463 iov[1].iov_len = buf_data_size;
4464
4465 rqst.rq_iov = iov;
4466 rqst.rq_nvec = 2;
4467 if (iter) {
4468 rqst.rq_iter = *iter;
4469 rqst.rq_iter_size = iov_iter_count(iter);
4470 iter_size = iov_iter_count(iter);
4471 }
4472
4473 rc = crypt_message(server, 1, &rqst, 0);
4474 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4475
4476 if (rc)
4477 return rc;
4478
4479 memmove(buf, iov[1].iov_base, buf_data_size);
4480
4481 if (!is_offloaded)
4482 server->total_read = buf_data_size + iter_size;
4483
4484 return rc;
4485 }
4486
4487 static int
cifs_copy_pages_to_iter(struct xarray * pages,unsigned int data_size,unsigned int skip,struct iov_iter * iter)4488 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4489 unsigned int skip, struct iov_iter *iter)
4490 {
4491 struct page *page;
4492 unsigned long index;
4493
4494 xa_for_each(pages, index, page) {
4495 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4496
4497 n = copy_page_to_iter(page, skip, len, iter);
4498 if (n != len) {
4499 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4500 return -EIO;
4501 }
4502 data_size -= n;
4503 skip = 0;
4504 }
4505
4506 return 0;
4507 }
4508
4509 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)4510 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4511 char *buf, unsigned int buf_len, struct xarray *pages,
4512 unsigned int pages_len, bool is_offloaded)
4513 {
4514 unsigned int data_offset;
4515 unsigned int data_len;
4516 unsigned int cur_off;
4517 unsigned int cur_page_idx;
4518 unsigned int pad_len;
4519 struct cifs_readdata *rdata = mid->callback_data;
4520 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4521 int length;
4522 bool use_rdma_mr = false;
4523
4524 if (shdr->Command != SMB2_READ) {
4525 cifs_server_dbg(VFS, "only big read responses are supported\n");
4526 return -EOPNOTSUPP;
4527 }
4528
4529 if (server->ops->is_session_expired &&
4530 server->ops->is_session_expired(buf)) {
4531 if (!is_offloaded)
4532 cifs_reconnect(server, true);
4533 return -1;
4534 }
4535
4536 if (server->ops->is_status_pending &&
4537 server->ops->is_status_pending(buf, server))
4538 return -1;
4539
4540 /* set up first two iov to get credits */
4541 rdata->iov[0].iov_base = buf;
4542 rdata->iov[0].iov_len = 0;
4543 rdata->iov[1].iov_base = buf;
4544 rdata->iov[1].iov_len =
4545 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4546 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4547 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4548 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4549 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4550
4551 rdata->result = server->ops->map_error(buf, true);
4552 if (rdata->result != 0) {
4553 cifs_dbg(FYI, "%s: server returned error %d\n",
4554 __func__, rdata->result);
4555 /* normal error on read response */
4556 if (is_offloaded)
4557 mid->mid_state = MID_RESPONSE_RECEIVED;
4558 else
4559 dequeue_mid(mid, false);
4560 return 0;
4561 }
4562
4563 data_offset = server->ops->read_data_offset(buf);
4564 #ifdef CONFIG_CIFS_SMB_DIRECT
4565 use_rdma_mr = rdata->mr;
4566 #endif
4567 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4568
4569 if (data_offset < server->vals->read_rsp_size) {
4570 /*
4571 * win2k8 sometimes sends an offset of 0 when the read
4572 * is beyond the EOF. Treat it as if the data starts just after
4573 * the header.
4574 */
4575 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4576 __func__, data_offset);
4577 data_offset = server->vals->read_rsp_size;
4578 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4579 /* data_offset is beyond the end of smallbuf */
4580 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4581 __func__, data_offset);
4582 rdata->result = -EIO;
4583 if (is_offloaded)
4584 mid->mid_state = MID_RESPONSE_MALFORMED;
4585 else
4586 dequeue_mid(mid, rdata->result);
4587 return 0;
4588 }
4589
4590 pad_len = data_offset - server->vals->read_rsp_size;
4591
4592 if (buf_len <= data_offset) {
4593 /* read response payload is in pages */
4594 cur_page_idx = pad_len / PAGE_SIZE;
4595 cur_off = pad_len % PAGE_SIZE;
4596
4597 if (cur_page_idx != 0) {
4598 /* data offset is beyond the 1st page of response */
4599 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4600 __func__, data_offset);
4601 rdata->result = -EIO;
4602 if (is_offloaded)
4603 mid->mid_state = MID_RESPONSE_MALFORMED;
4604 else
4605 dequeue_mid(mid, rdata->result);
4606 return 0;
4607 }
4608
4609 if (data_len > pages_len - pad_len) {
4610 /* data_len is corrupt -- discard frame */
4611 rdata->result = -EIO;
4612 if (is_offloaded)
4613 mid->mid_state = MID_RESPONSE_MALFORMED;
4614 else
4615 dequeue_mid(mid, rdata->result);
4616 return 0;
4617 }
4618
4619 /* Copy the data to the output I/O iterator. */
4620 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4621 cur_off, &rdata->iter);
4622 if (rdata->result != 0) {
4623 if (is_offloaded)
4624 mid->mid_state = MID_RESPONSE_MALFORMED;
4625 else
4626 dequeue_mid(mid, rdata->result);
4627 return 0;
4628 }
4629 rdata->got_bytes = pages_len;
4630
4631 } else if (buf_len >= data_offset + data_len) {
4632 /* read response payload is in buf */
4633 WARN_ONCE(pages && !xa_empty(pages),
4634 "read data can be either in buf or in pages");
4635 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4636 if (length < 0)
4637 return length;
4638 rdata->got_bytes = data_len;
4639 } else {
4640 /* read response payload cannot be in both buf and pages */
4641 WARN_ONCE(1, "buf can not contain only a part of read data");
4642 rdata->result = -EIO;
4643 if (is_offloaded)
4644 mid->mid_state = MID_RESPONSE_MALFORMED;
4645 else
4646 dequeue_mid(mid, rdata->result);
4647 return 0;
4648 }
4649
4650 if (is_offloaded)
4651 mid->mid_state = MID_RESPONSE_RECEIVED;
4652 else
4653 dequeue_mid(mid, false);
4654 return 0;
4655 }
4656
4657 struct smb2_decrypt_work {
4658 struct work_struct decrypt;
4659 struct TCP_Server_Info *server;
4660 struct xarray buffer;
4661 char *buf;
4662 unsigned int len;
4663 };
4664
4665
smb2_decrypt_offload(struct work_struct * work)4666 static void smb2_decrypt_offload(struct work_struct *work)
4667 {
4668 struct smb2_decrypt_work *dw = container_of(work,
4669 struct smb2_decrypt_work, decrypt);
4670 int rc;
4671 struct mid_q_entry *mid;
4672 struct iov_iter iter;
4673
4674 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4675 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4676 &iter, true);
4677 if (rc) {
4678 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4679 goto free_pages;
4680 }
4681
4682 dw->server->lstrp = jiffies;
4683 mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4684 if (mid == NULL)
4685 cifs_dbg(FYI, "mid not found\n");
4686 else {
4687 mid->decrypted = true;
4688 rc = handle_read_data(dw->server, mid, dw->buf,
4689 dw->server->vals->read_rsp_size,
4690 &dw->buffer, dw->len,
4691 true);
4692 if (rc >= 0) {
4693 #ifdef CONFIG_CIFS_STATS2
4694 mid->when_received = jiffies;
4695 #endif
4696 if (dw->server->ops->is_network_name_deleted)
4697 dw->server->ops->is_network_name_deleted(dw->buf,
4698 dw->server);
4699
4700 mid->callback(mid);
4701 } else {
4702 spin_lock(&dw->server->srv_lock);
4703 if (dw->server->tcpStatus == CifsNeedReconnect) {
4704 spin_lock(&dw->server->mid_lock);
4705 mid->mid_state = MID_RETRY_NEEDED;
4706 spin_unlock(&dw->server->mid_lock);
4707 spin_unlock(&dw->server->srv_lock);
4708 mid->callback(mid);
4709 } else {
4710 spin_lock(&dw->server->mid_lock);
4711 mid->mid_state = MID_REQUEST_SUBMITTED;
4712 mid->mid_flags &= ~(MID_DELETED);
4713 list_add_tail(&mid->qhead,
4714 &dw->server->pending_mid_q);
4715 spin_unlock(&dw->server->mid_lock);
4716 spin_unlock(&dw->server->srv_lock);
4717 }
4718 }
4719 release_mid(mid);
4720 }
4721
4722 free_pages:
4723 cifs_clear_xarray_buffer(&dw->buffer);
4724 cifs_small_buf_release(dw->buf);
4725 kfree(dw);
4726 }
4727
4728
4729 static int
receive_encrypted_read(struct TCP_Server_Info * server,struct mid_q_entry ** mid,int * num_mids)4730 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4731 int *num_mids)
4732 {
4733 struct page *page;
4734 char *buf = server->smallbuf;
4735 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4736 struct iov_iter iter;
4737 unsigned int len, npages;
4738 unsigned int buflen = server->pdu_size;
4739 int rc;
4740 int i = 0;
4741 struct smb2_decrypt_work *dw;
4742
4743 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4744 if (!dw)
4745 return -ENOMEM;
4746 xa_init(&dw->buffer);
4747 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4748 dw->server = server;
4749
4750 *num_mids = 1;
4751 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4752 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4753
4754 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4755 if (rc < 0)
4756 goto free_dw;
4757 server->total_read += rc;
4758
4759 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4760 server->vals->read_rsp_size;
4761 dw->len = len;
4762 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4763
4764 rc = -ENOMEM;
4765 for (; i < npages; i++) {
4766 void *old;
4767
4768 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4769 if (!page)
4770 goto discard_data;
4771 page->index = i;
4772 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4773 if (xa_is_err(old)) {
4774 rc = xa_err(old);
4775 put_page(page);
4776 goto discard_data;
4777 }
4778 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4779 }
4780
4781 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4782
4783 /* Read the data into the buffer and clear excess bufferage. */
4784 rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4785 if (rc < 0)
4786 goto discard_data;
4787
4788 server->total_read += rc;
4789 if (rc < npages * PAGE_SIZE)
4790 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4791 iov_iter_revert(&iter, npages * PAGE_SIZE);
4792 iov_iter_truncate(&iter, dw->len);
4793
4794 rc = cifs_discard_remaining_data(server);
4795 if (rc)
4796 goto free_pages;
4797
4798 /*
4799 * For large reads, offload to different thread for better performance,
4800 * use more cores decrypting which can be expensive
4801 */
4802
4803 if ((server->min_offload) && (server->in_flight > 1) &&
4804 (server->pdu_size >= server->min_offload)) {
4805 dw->buf = server->smallbuf;
4806 server->smallbuf = (char *)cifs_small_buf_get();
4807
4808 queue_work(decrypt_wq, &dw->decrypt);
4809 *num_mids = 0; /* worker thread takes care of finding mid */
4810 return -1;
4811 }
4812
4813 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4814 &iter, false);
4815 if (rc)
4816 goto free_pages;
4817
4818 *mid = smb2_find_mid(server, buf);
4819 if (*mid == NULL) {
4820 cifs_dbg(FYI, "mid not found\n");
4821 } else {
4822 cifs_dbg(FYI, "mid found\n");
4823 (*mid)->decrypted = true;
4824 rc = handle_read_data(server, *mid, buf,
4825 server->vals->read_rsp_size,
4826 &dw->buffer, dw->len, false);
4827 if (rc >= 0) {
4828 if (server->ops->is_network_name_deleted) {
4829 server->ops->is_network_name_deleted(buf,
4830 server);
4831 }
4832 }
4833 }
4834
4835 free_pages:
4836 cifs_clear_xarray_buffer(&dw->buffer);
4837 free_dw:
4838 kfree(dw);
4839 return rc;
4840 discard_data:
4841 cifs_discard_remaining_data(server);
4842 goto free_pages;
4843 }
4844
4845 static int
receive_encrypted_standard(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)4846 receive_encrypted_standard(struct TCP_Server_Info *server,
4847 struct mid_q_entry **mids, char **bufs,
4848 int *num_mids)
4849 {
4850 int ret, length;
4851 char *buf = server->smallbuf;
4852 struct smb2_hdr *shdr;
4853 unsigned int pdu_length = server->pdu_size;
4854 unsigned int buf_size;
4855 unsigned int next_cmd;
4856 struct mid_q_entry *mid_entry;
4857 int next_is_large;
4858 char *next_buffer = NULL;
4859
4860 *num_mids = 0;
4861
4862 /* switch to large buffer if too big for a small one */
4863 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4864 server->large_buf = true;
4865 memcpy(server->bigbuf, buf, server->total_read);
4866 buf = server->bigbuf;
4867 }
4868
4869 /* now read the rest */
4870 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4871 pdu_length - HEADER_SIZE(server) + 1);
4872 if (length < 0)
4873 return length;
4874 server->total_read += length;
4875
4876 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4877 length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4878 if (length)
4879 return length;
4880
4881 next_is_large = server->large_buf;
4882 one_more:
4883 shdr = (struct smb2_hdr *)buf;
4884 next_cmd = le32_to_cpu(shdr->NextCommand);
4885 if (next_cmd) {
4886 if (WARN_ON_ONCE(next_cmd > pdu_length))
4887 return -1;
4888 if (next_is_large)
4889 next_buffer = (char *)cifs_buf_get();
4890 else
4891 next_buffer = (char *)cifs_small_buf_get();
4892 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
4893 }
4894
4895 mid_entry = smb2_find_mid(server, buf);
4896 if (mid_entry == NULL)
4897 cifs_dbg(FYI, "mid not found\n");
4898 else {
4899 cifs_dbg(FYI, "mid found\n");
4900 mid_entry->decrypted = true;
4901 mid_entry->resp_buf_size = server->pdu_size;
4902 }
4903
4904 if (*num_mids >= MAX_COMPOUND) {
4905 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4906 return -1;
4907 }
4908 bufs[*num_mids] = buf;
4909 mids[(*num_mids)++] = mid_entry;
4910
4911 if (mid_entry && mid_entry->handle)
4912 ret = mid_entry->handle(server, mid_entry);
4913 else
4914 ret = cifs_handle_standard(server, mid_entry);
4915
4916 if (ret == 0 && next_cmd) {
4917 pdu_length -= next_cmd;
4918 server->large_buf = next_is_large;
4919 if (next_is_large)
4920 server->bigbuf = buf = next_buffer;
4921 else
4922 server->smallbuf = buf = next_buffer;
4923 goto one_more;
4924 } else if (ret != 0) {
4925 /*
4926 * ret != 0 here means that we didn't get to handle_mid() thus
4927 * server->smallbuf and server->bigbuf are still valid. We need
4928 * to free next_buffer because it is not going to be used
4929 * anywhere.
4930 */
4931 if (next_is_large)
4932 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4933 else
4934 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4935 }
4936
4937 return ret;
4938 }
4939
4940 static int
smb3_receive_transform(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)4941 smb3_receive_transform(struct TCP_Server_Info *server,
4942 struct mid_q_entry **mids, char **bufs, int *num_mids)
4943 {
4944 char *buf = server->smallbuf;
4945 unsigned int pdu_length = server->pdu_size;
4946 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4947 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4948
4949 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4950 sizeof(struct smb2_hdr)) {
4951 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4952 pdu_length);
4953 cifs_reconnect(server, true);
4954 return -ECONNABORTED;
4955 }
4956
4957 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4958 cifs_server_dbg(VFS, "Transform message is broken\n");
4959 cifs_reconnect(server, true);
4960 return -ECONNABORTED;
4961 }
4962
4963 /* TODO: add support for compounds containing READ. */
4964 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4965 return receive_encrypted_read(server, &mids[0], num_mids);
4966 }
4967
4968 return receive_encrypted_standard(server, mids, bufs, num_mids);
4969 }
4970
4971 int
smb3_handle_read_data(struct TCP_Server_Info * server,struct mid_q_entry * mid)4972 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4973 {
4974 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4975
4976 return handle_read_data(server, mid, buf, server->pdu_size,
4977 NULL, 0, false);
4978 }
4979
smb2_next_header(struct TCP_Server_Info * server,char * buf,unsigned int * noff)4980 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
4981 unsigned int *noff)
4982 {
4983 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
4984 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4985
4986 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
4987 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);
4988 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
4989 return -EINVAL;
4990 } else {
4991 *noff = le32_to_cpu(hdr->NextCommand);
4992 }
4993 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
4994 return -EINVAL;
4995 return 0;
4996 }
4997
__cifs_sfu_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)4998 static int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,
4999 struct dentry *dentry, struct cifs_tcon *tcon,
5000 const char *full_path, umode_t mode, dev_t dev)
5001 {
5002 struct TCP_Server_Info *server = tcon->ses->server;
5003 struct cifs_open_parms oparms;
5004 struct cifs_io_parms io_parms = {};
5005 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5006 struct cifs_fid fid;
5007 unsigned int bytes_written;
5008 struct win_dev pdev = {};
5009 struct kvec iov[2];
5010 __u32 oplock = server->oplocks ? REQ_OPLOCK : 0;
5011 int rc;
5012
5013 switch (mode & S_IFMT) {
5014 case S_IFCHR:
5015 strscpy(pdev.type, "IntxCHR", strlen("IntxChr"));
5016 pdev.major = cpu_to_le64(MAJOR(dev));
5017 pdev.minor = cpu_to_le64(MINOR(dev));
5018 break;
5019 case S_IFBLK:
5020 strscpy(pdev.type, "IntxBLK", strlen("IntxBLK"));
5021 pdev.major = cpu_to_le64(MAJOR(dev));
5022 pdev.minor = cpu_to_le64(MINOR(dev));
5023 break;
5024 case S_IFIFO:
5025 strscpy(pdev.type, "LnxFIFO", strlen("LnxFIFO"));
5026 break;
5027 default:
5028 return -EPERM;
5029 }
5030
5031 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE,
5032 FILE_CREATE, CREATE_NOT_DIR |
5033 CREATE_OPTION_SPECIAL, ACL_NO_MODE);
5034 oparms.fid = &fid;
5035
5036 rc = server->ops->open(xid, &oparms, &oplock, NULL);
5037 if (rc)
5038 return rc;
5039
5040 io_parms.pid = current->tgid;
5041 io_parms.tcon = tcon;
5042 io_parms.length = sizeof(pdev);
5043 iov[1].iov_base = &pdev;
5044 iov[1].iov_len = sizeof(pdev);
5045
5046 rc = server->ops->sync_write(xid, &fid, &io_parms,
5047 &bytes_written, iov, 1);
5048 server->ops->close(xid, tcon, &fid);
5049 return rc;
5050 }
5051
cifs_sfu_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)5052 int cifs_sfu_make_node(unsigned int xid, struct inode *inode,
5053 struct dentry *dentry, struct cifs_tcon *tcon,
5054 const char *full_path, umode_t mode, dev_t dev)
5055 {
5056 struct inode *new = NULL;
5057 int rc;
5058
5059 rc = __cifs_sfu_make_node(xid, inode, dentry, tcon,
5060 full_path, mode, dev);
5061 if (rc)
5062 return rc;
5063
5064 if (tcon->posix_extensions) {
5065 rc = smb311_posix_get_inode_info(&new, full_path, NULL,
5066 inode->i_sb, xid);
5067 } else if (tcon->unix_ext) {
5068 rc = cifs_get_inode_info_unix(&new, full_path,
5069 inode->i_sb, xid);
5070 } else {
5071 rc = cifs_get_inode_info(&new, full_path, NULL,
5072 inode->i_sb, xid, NULL);
5073 }
5074 if (!rc)
5075 d_instantiate(dentry, new);
5076 return rc;
5077 }
5078
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)5079 static int smb2_make_node(unsigned int xid, struct inode *inode,
5080 struct dentry *dentry, struct cifs_tcon *tcon,
5081 const char *full_path, umode_t mode, dev_t dev)
5082 {
5083 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5084 int rc;
5085
5086 /*
5087 * Check if mounted with mount parm 'sfu' mount parm.
5088 * SFU emulation should work with all servers, but only
5089 * supports block and char device (no socket & fifo),
5090 * and was used by default in earlier versions of Windows
5091 */
5092 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
5093 rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
5094 full_path, mode, dev);
5095 } else {
5096 rc = smb2_mknod_reparse(xid, inode, dentry, tcon,
5097 full_path, mode, dev);
5098 }
5099 return rc;
5100 }
5101
5102 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5103 struct smb_version_operations smb20_operations = {
5104 .compare_fids = smb2_compare_fids,
5105 .setup_request = smb2_setup_request,
5106 .setup_async_request = smb2_setup_async_request,
5107 .check_receive = smb2_check_receive,
5108 .add_credits = smb2_add_credits,
5109 .set_credits = smb2_set_credits,
5110 .get_credits_field = smb2_get_credits_field,
5111 .get_credits = smb2_get_credits,
5112 .wait_mtu_credits = cifs_wait_mtu_credits,
5113 .get_next_mid = smb2_get_next_mid,
5114 .revert_current_mid = smb2_revert_current_mid,
5115 .read_data_offset = smb2_read_data_offset,
5116 .read_data_length = smb2_read_data_length,
5117 .map_error = map_smb2_to_linux_error,
5118 .find_mid = smb2_find_mid,
5119 .check_message = smb2_check_message,
5120 .dump_detail = smb2_dump_detail,
5121 .clear_stats = smb2_clear_stats,
5122 .print_stats = smb2_print_stats,
5123 .is_oplock_break = smb2_is_valid_oplock_break,
5124 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5125 .downgrade_oplock = smb2_downgrade_oplock,
5126 .need_neg = smb2_need_neg,
5127 .negotiate = smb2_negotiate,
5128 .negotiate_wsize = smb2_negotiate_wsize,
5129 .negotiate_rsize = smb2_negotiate_rsize,
5130 .sess_setup = SMB2_sess_setup,
5131 .logoff = SMB2_logoff,
5132 .tree_connect = SMB2_tcon,
5133 .tree_disconnect = SMB2_tdis,
5134 .qfs_tcon = smb2_qfs_tcon,
5135 .is_path_accessible = smb2_is_path_accessible,
5136 .can_echo = smb2_can_echo,
5137 .echo = SMB2_echo,
5138 .query_path_info = smb2_query_path_info,
5139 .query_reparse_point = smb2_query_reparse_point,
5140 .get_srv_inum = smb2_get_srv_inum,
5141 .query_file_info = smb2_query_file_info,
5142 .set_path_size = smb2_set_path_size,
5143 .set_file_size = smb2_set_file_size,
5144 .set_file_info = smb2_set_file_info,
5145 .set_compression = smb2_set_compression,
5146 .mkdir = smb2_mkdir,
5147 .mkdir_setinfo = smb2_mkdir_setinfo,
5148 .rmdir = smb2_rmdir,
5149 .unlink = smb2_unlink,
5150 .rename = smb2_rename_path,
5151 .create_hardlink = smb2_create_hardlink,
5152 .parse_reparse_point = smb2_parse_reparse_point,
5153 .query_mf_symlink = smb3_query_mf_symlink,
5154 .create_mf_symlink = smb3_create_mf_symlink,
5155 .create_reparse_symlink = smb2_create_reparse_symlink,
5156 .open = smb2_open_file,
5157 .set_fid = smb2_set_fid,
5158 .close = smb2_close_file,
5159 .flush = smb2_flush_file,
5160 .async_readv = smb2_async_readv,
5161 .async_writev = smb2_async_writev,
5162 .sync_read = smb2_sync_read,
5163 .sync_write = smb2_sync_write,
5164 .query_dir_first = smb2_query_dir_first,
5165 .query_dir_next = smb2_query_dir_next,
5166 .close_dir = smb2_close_dir,
5167 .calc_smb_size = smb2_calc_size,
5168 .is_status_pending = smb2_is_status_pending,
5169 .is_session_expired = smb2_is_session_expired,
5170 .oplock_response = smb2_oplock_response,
5171 .queryfs = smb2_queryfs,
5172 .mand_lock = smb2_mand_lock,
5173 .mand_unlock_range = smb2_unlock_range,
5174 .push_mand_locks = smb2_push_mandatory_locks,
5175 .get_lease_key = smb2_get_lease_key,
5176 .set_lease_key = smb2_set_lease_key,
5177 .new_lease_key = smb2_new_lease_key,
5178 .calc_signature = smb2_calc_signature,
5179 .is_read_op = smb2_is_read_op,
5180 .set_oplock_level = smb2_set_oplock_level,
5181 .create_lease_buf = smb2_create_lease_buf,
5182 .parse_lease_buf = smb2_parse_lease_buf,
5183 .copychunk_range = smb2_copychunk_range,
5184 .wp_retry_size = smb2_wp_retry_size,
5185 .dir_needs_close = smb2_dir_needs_close,
5186 .get_dfs_refer = smb2_get_dfs_refer,
5187 .select_sectype = smb2_select_sectype,
5188 #ifdef CONFIG_CIFS_XATTR
5189 .query_all_EAs = smb2_query_eas,
5190 .set_EA = smb2_set_ea,
5191 #endif /* CIFS_XATTR */
5192 .get_acl = get_smb2_acl,
5193 .get_acl_by_fid = get_smb2_acl_by_fid,
5194 .set_acl = set_smb2_acl,
5195 .next_header = smb2_next_header,
5196 .ioctl_query_info = smb2_ioctl_query_info,
5197 .make_node = smb2_make_node,
5198 .fiemap = smb3_fiemap,
5199 .llseek = smb3_llseek,
5200 .is_status_io_timeout = smb2_is_status_io_timeout,
5201 .is_network_name_deleted = smb2_is_network_name_deleted,
5202 };
5203 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5204
5205 struct smb_version_operations smb21_operations = {
5206 .compare_fids = smb2_compare_fids,
5207 .setup_request = smb2_setup_request,
5208 .setup_async_request = smb2_setup_async_request,
5209 .check_receive = smb2_check_receive,
5210 .add_credits = smb2_add_credits,
5211 .set_credits = smb2_set_credits,
5212 .get_credits_field = smb2_get_credits_field,
5213 .get_credits = smb2_get_credits,
5214 .wait_mtu_credits = smb2_wait_mtu_credits,
5215 .adjust_credits = smb2_adjust_credits,
5216 .get_next_mid = smb2_get_next_mid,
5217 .revert_current_mid = smb2_revert_current_mid,
5218 .read_data_offset = smb2_read_data_offset,
5219 .read_data_length = smb2_read_data_length,
5220 .map_error = map_smb2_to_linux_error,
5221 .find_mid = smb2_find_mid,
5222 .check_message = smb2_check_message,
5223 .dump_detail = smb2_dump_detail,
5224 .clear_stats = smb2_clear_stats,
5225 .print_stats = smb2_print_stats,
5226 .is_oplock_break = smb2_is_valid_oplock_break,
5227 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5228 .downgrade_oplock = smb2_downgrade_oplock,
5229 .need_neg = smb2_need_neg,
5230 .negotiate = smb2_negotiate,
5231 .negotiate_wsize = smb2_negotiate_wsize,
5232 .negotiate_rsize = smb2_negotiate_rsize,
5233 .sess_setup = SMB2_sess_setup,
5234 .logoff = SMB2_logoff,
5235 .tree_connect = SMB2_tcon,
5236 .tree_disconnect = SMB2_tdis,
5237 .qfs_tcon = smb2_qfs_tcon,
5238 .is_path_accessible = smb2_is_path_accessible,
5239 .can_echo = smb2_can_echo,
5240 .echo = SMB2_echo,
5241 .query_path_info = smb2_query_path_info,
5242 .query_reparse_point = smb2_query_reparse_point,
5243 .get_srv_inum = smb2_get_srv_inum,
5244 .query_file_info = smb2_query_file_info,
5245 .set_path_size = smb2_set_path_size,
5246 .set_file_size = smb2_set_file_size,
5247 .set_file_info = smb2_set_file_info,
5248 .set_compression = smb2_set_compression,
5249 .mkdir = smb2_mkdir,
5250 .mkdir_setinfo = smb2_mkdir_setinfo,
5251 .rmdir = smb2_rmdir,
5252 .unlink = smb2_unlink,
5253 .rename = smb2_rename_path,
5254 .create_hardlink = smb2_create_hardlink,
5255 .parse_reparse_point = smb2_parse_reparse_point,
5256 .query_mf_symlink = smb3_query_mf_symlink,
5257 .create_mf_symlink = smb3_create_mf_symlink,
5258 .create_reparse_symlink = smb2_create_reparse_symlink,
5259 .open = smb2_open_file,
5260 .set_fid = smb2_set_fid,
5261 .close = smb2_close_file,
5262 .flush = smb2_flush_file,
5263 .async_readv = smb2_async_readv,
5264 .async_writev = smb2_async_writev,
5265 .sync_read = smb2_sync_read,
5266 .sync_write = smb2_sync_write,
5267 .query_dir_first = smb2_query_dir_first,
5268 .query_dir_next = smb2_query_dir_next,
5269 .close_dir = smb2_close_dir,
5270 .calc_smb_size = smb2_calc_size,
5271 .is_status_pending = smb2_is_status_pending,
5272 .is_session_expired = smb2_is_session_expired,
5273 .oplock_response = smb2_oplock_response,
5274 .queryfs = smb2_queryfs,
5275 .mand_lock = smb2_mand_lock,
5276 .mand_unlock_range = smb2_unlock_range,
5277 .push_mand_locks = smb2_push_mandatory_locks,
5278 .get_lease_key = smb2_get_lease_key,
5279 .set_lease_key = smb2_set_lease_key,
5280 .new_lease_key = smb2_new_lease_key,
5281 .calc_signature = smb2_calc_signature,
5282 .is_read_op = smb21_is_read_op,
5283 .set_oplock_level = smb21_set_oplock_level,
5284 .create_lease_buf = smb2_create_lease_buf,
5285 .parse_lease_buf = smb2_parse_lease_buf,
5286 .copychunk_range = smb2_copychunk_range,
5287 .wp_retry_size = smb2_wp_retry_size,
5288 .dir_needs_close = smb2_dir_needs_close,
5289 .enum_snapshots = smb3_enum_snapshots,
5290 .notify = smb3_notify,
5291 .get_dfs_refer = smb2_get_dfs_refer,
5292 .select_sectype = smb2_select_sectype,
5293 #ifdef CONFIG_CIFS_XATTR
5294 .query_all_EAs = smb2_query_eas,
5295 .set_EA = smb2_set_ea,
5296 #endif /* CIFS_XATTR */
5297 .get_acl = get_smb2_acl,
5298 .get_acl_by_fid = get_smb2_acl_by_fid,
5299 .set_acl = set_smb2_acl,
5300 .next_header = smb2_next_header,
5301 .ioctl_query_info = smb2_ioctl_query_info,
5302 .make_node = smb2_make_node,
5303 .fiemap = smb3_fiemap,
5304 .llseek = smb3_llseek,
5305 .is_status_io_timeout = smb2_is_status_io_timeout,
5306 .is_network_name_deleted = smb2_is_network_name_deleted,
5307 };
5308
5309 struct smb_version_operations smb30_operations = {
5310 .compare_fids = smb2_compare_fids,
5311 .setup_request = smb2_setup_request,
5312 .setup_async_request = smb2_setup_async_request,
5313 .check_receive = smb2_check_receive,
5314 .add_credits = smb2_add_credits,
5315 .set_credits = smb2_set_credits,
5316 .get_credits_field = smb2_get_credits_field,
5317 .get_credits = smb2_get_credits,
5318 .wait_mtu_credits = smb2_wait_mtu_credits,
5319 .adjust_credits = smb2_adjust_credits,
5320 .get_next_mid = smb2_get_next_mid,
5321 .revert_current_mid = smb2_revert_current_mid,
5322 .read_data_offset = smb2_read_data_offset,
5323 .read_data_length = smb2_read_data_length,
5324 .map_error = map_smb2_to_linux_error,
5325 .find_mid = smb2_find_mid,
5326 .check_message = smb2_check_message,
5327 .dump_detail = smb2_dump_detail,
5328 .clear_stats = smb2_clear_stats,
5329 .print_stats = smb2_print_stats,
5330 .dump_share_caps = smb2_dump_share_caps,
5331 .is_oplock_break = smb2_is_valid_oplock_break,
5332 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5333 .downgrade_oplock = smb3_downgrade_oplock,
5334 .need_neg = smb2_need_neg,
5335 .negotiate = smb2_negotiate,
5336 .negotiate_wsize = smb3_negotiate_wsize,
5337 .negotiate_rsize = smb3_negotiate_rsize,
5338 .sess_setup = SMB2_sess_setup,
5339 .logoff = SMB2_logoff,
5340 .tree_connect = SMB2_tcon,
5341 .tree_disconnect = SMB2_tdis,
5342 .qfs_tcon = smb3_qfs_tcon,
5343 .query_server_interfaces = SMB3_request_interfaces,
5344 .is_path_accessible = smb2_is_path_accessible,
5345 .can_echo = smb2_can_echo,
5346 .echo = SMB2_echo,
5347 .query_path_info = smb2_query_path_info,
5348 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5349 .query_reparse_point = smb2_query_reparse_point,
5350 .get_srv_inum = smb2_get_srv_inum,
5351 .query_file_info = smb2_query_file_info,
5352 .set_path_size = smb2_set_path_size,
5353 .set_file_size = smb2_set_file_size,
5354 .set_file_info = smb2_set_file_info,
5355 .set_compression = smb2_set_compression,
5356 .mkdir = smb2_mkdir,
5357 .mkdir_setinfo = smb2_mkdir_setinfo,
5358 .rmdir = smb2_rmdir,
5359 .unlink = smb2_unlink,
5360 .rename = smb2_rename_path,
5361 .create_hardlink = smb2_create_hardlink,
5362 .parse_reparse_point = smb2_parse_reparse_point,
5363 .query_mf_symlink = smb3_query_mf_symlink,
5364 .create_mf_symlink = smb3_create_mf_symlink,
5365 .create_reparse_symlink = smb2_create_reparse_symlink,
5366 .open = smb2_open_file,
5367 .set_fid = smb2_set_fid,
5368 .close = smb2_close_file,
5369 .close_getattr = smb2_close_getattr,
5370 .flush = smb2_flush_file,
5371 .async_readv = smb2_async_readv,
5372 .async_writev = smb2_async_writev,
5373 .sync_read = smb2_sync_read,
5374 .sync_write = smb2_sync_write,
5375 .query_dir_first = smb2_query_dir_first,
5376 .query_dir_next = smb2_query_dir_next,
5377 .close_dir = smb2_close_dir,
5378 .calc_smb_size = smb2_calc_size,
5379 .is_status_pending = smb2_is_status_pending,
5380 .is_session_expired = smb2_is_session_expired,
5381 .oplock_response = smb2_oplock_response,
5382 .queryfs = smb2_queryfs,
5383 .mand_lock = smb2_mand_lock,
5384 .mand_unlock_range = smb2_unlock_range,
5385 .push_mand_locks = smb2_push_mandatory_locks,
5386 .get_lease_key = smb2_get_lease_key,
5387 .set_lease_key = smb2_set_lease_key,
5388 .new_lease_key = smb2_new_lease_key,
5389 .generate_signingkey = generate_smb30signingkey,
5390 .calc_signature = smb3_calc_signature,
5391 .set_integrity = smb3_set_integrity,
5392 .is_read_op = smb21_is_read_op,
5393 .set_oplock_level = smb3_set_oplock_level,
5394 .create_lease_buf = smb3_create_lease_buf,
5395 .parse_lease_buf = smb3_parse_lease_buf,
5396 .copychunk_range = smb2_copychunk_range,
5397 .duplicate_extents = smb2_duplicate_extents,
5398 .validate_negotiate = smb3_validate_negotiate,
5399 .wp_retry_size = smb2_wp_retry_size,
5400 .dir_needs_close = smb2_dir_needs_close,
5401 .fallocate = smb3_fallocate,
5402 .enum_snapshots = smb3_enum_snapshots,
5403 .notify = smb3_notify,
5404 .init_transform_rq = smb3_init_transform_rq,
5405 .is_transform_hdr = smb3_is_transform_hdr,
5406 .receive_transform = smb3_receive_transform,
5407 .get_dfs_refer = smb2_get_dfs_refer,
5408 .select_sectype = smb2_select_sectype,
5409 #ifdef CONFIG_CIFS_XATTR
5410 .query_all_EAs = smb2_query_eas,
5411 .set_EA = smb2_set_ea,
5412 #endif /* CIFS_XATTR */
5413 .get_acl = get_smb2_acl,
5414 .get_acl_by_fid = get_smb2_acl_by_fid,
5415 .set_acl = set_smb2_acl,
5416 .next_header = smb2_next_header,
5417 .ioctl_query_info = smb2_ioctl_query_info,
5418 .make_node = smb2_make_node,
5419 .fiemap = smb3_fiemap,
5420 .llseek = smb3_llseek,
5421 .is_status_io_timeout = smb2_is_status_io_timeout,
5422 .is_network_name_deleted = smb2_is_network_name_deleted,
5423 };
5424
5425 struct smb_version_operations smb311_operations = {
5426 .compare_fids = smb2_compare_fids,
5427 .setup_request = smb2_setup_request,
5428 .setup_async_request = smb2_setup_async_request,
5429 .check_receive = smb2_check_receive,
5430 .add_credits = smb2_add_credits,
5431 .set_credits = smb2_set_credits,
5432 .get_credits_field = smb2_get_credits_field,
5433 .get_credits = smb2_get_credits,
5434 .wait_mtu_credits = smb2_wait_mtu_credits,
5435 .adjust_credits = smb2_adjust_credits,
5436 .get_next_mid = smb2_get_next_mid,
5437 .revert_current_mid = smb2_revert_current_mid,
5438 .read_data_offset = smb2_read_data_offset,
5439 .read_data_length = smb2_read_data_length,
5440 .map_error = map_smb2_to_linux_error,
5441 .find_mid = smb2_find_mid,
5442 .check_message = smb2_check_message,
5443 .dump_detail = smb2_dump_detail,
5444 .clear_stats = smb2_clear_stats,
5445 .print_stats = smb2_print_stats,
5446 .dump_share_caps = smb2_dump_share_caps,
5447 .is_oplock_break = smb2_is_valid_oplock_break,
5448 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5449 .downgrade_oplock = smb3_downgrade_oplock,
5450 .need_neg = smb2_need_neg,
5451 .negotiate = smb2_negotiate,
5452 .negotiate_wsize = smb3_negotiate_wsize,
5453 .negotiate_rsize = smb3_negotiate_rsize,
5454 .sess_setup = SMB2_sess_setup,
5455 .logoff = SMB2_logoff,
5456 .tree_connect = SMB2_tcon,
5457 .tree_disconnect = SMB2_tdis,
5458 .qfs_tcon = smb3_qfs_tcon,
5459 .query_server_interfaces = SMB3_request_interfaces,
5460 .is_path_accessible = smb2_is_path_accessible,
5461 .can_echo = smb2_can_echo,
5462 .echo = SMB2_echo,
5463 .query_path_info = smb2_query_path_info,
5464 .query_reparse_point = smb2_query_reparse_point,
5465 .get_srv_inum = smb2_get_srv_inum,
5466 .query_file_info = smb2_query_file_info,
5467 .set_path_size = smb2_set_path_size,
5468 .set_file_size = smb2_set_file_size,
5469 .set_file_info = smb2_set_file_info,
5470 .set_compression = smb2_set_compression,
5471 .mkdir = smb2_mkdir,
5472 .mkdir_setinfo = smb2_mkdir_setinfo,
5473 .posix_mkdir = smb311_posix_mkdir,
5474 .rmdir = smb2_rmdir,
5475 .unlink = smb2_unlink,
5476 .rename = smb2_rename_path,
5477 .create_hardlink = smb2_create_hardlink,
5478 .parse_reparse_point = smb2_parse_reparse_point,
5479 .query_mf_symlink = smb3_query_mf_symlink,
5480 .create_mf_symlink = smb3_create_mf_symlink,
5481 .create_reparse_symlink = smb2_create_reparse_symlink,
5482 .open = smb2_open_file,
5483 .set_fid = smb2_set_fid,
5484 .close = smb2_close_file,
5485 .close_getattr = smb2_close_getattr,
5486 .flush = smb2_flush_file,
5487 .async_readv = smb2_async_readv,
5488 .async_writev = smb2_async_writev,
5489 .sync_read = smb2_sync_read,
5490 .sync_write = smb2_sync_write,
5491 .query_dir_first = smb2_query_dir_first,
5492 .query_dir_next = smb2_query_dir_next,
5493 .close_dir = smb2_close_dir,
5494 .calc_smb_size = smb2_calc_size,
5495 .is_status_pending = smb2_is_status_pending,
5496 .is_session_expired = smb2_is_session_expired,
5497 .oplock_response = smb2_oplock_response,
5498 .queryfs = smb311_queryfs,
5499 .mand_lock = smb2_mand_lock,
5500 .mand_unlock_range = smb2_unlock_range,
5501 .push_mand_locks = smb2_push_mandatory_locks,
5502 .get_lease_key = smb2_get_lease_key,
5503 .set_lease_key = smb2_set_lease_key,
5504 .new_lease_key = smb2_new_lease_key,
5505 .generate_signingkey = generate_smb311signingkey,
5506 .calc_signature = smb3_calc_signature,
5507 .set_integrity = smb3_set_integrity,
5508 .is_read_op = smb21_is_read_op,
5509 .set_oplock_level = smb3_set_oplock_level,
5510 .create_lease_buf = smb3_create_lease_buf,
5511 .parse_lease_buf = smb3_parse_lease_buf,
5512 .copychunk_range = smb2_copychunk_range,
5513 .duplicate_extents = smb2_duplicate_extents,
5514 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5515 .wp_retry_size = smb2_wp_retry_size,
5516 .dir_needs_close = smb2_dir_needs_close,
5517 .fallocate = smb3_fallocate,
5518 .enum_snapshots = smb3_enum_snapshots,
5519 .notify = smb3_notify,
5520 .init_transform_rq = smb3_init_transform_rq,
5521 .is_transform_hdr = smb3_is_transform_hdr,
5522 .receive_transform = smb3_receive_transform,
5523 .get_dfs_refer = smb2_get_dfs_refer,
5524 .select_sectype = smb2_select_sectype,
5525 #ifdef CONFIG_CIFS_XATTR
5526 .query_all_EAs = smb2_query_eas,
5527 .set_EA = smb2_set_ea,
5528 #endif /* CIFS_XATTR */
5529 .get_acl = get_smb2_acl,
5530 .get_acl_by_fid = get_smb2_acl_by_fid,
5531 .set_acl = set_smb2_acl,
5532 .next_header = smb2_next_header,
5533 .ioctl_query_info = smb2_ioctl_query_info,
5534 .make_node = smb2_make_node,
5535 .fiemap = smb3_fiemap,
5536 .llseek = smb3_llseek,
5537 .is_status_io_timeout = smb2_is_status_io_timeout,
5538 .is_network_name_deleted = smb2_is_network_name_deleted,
5539 };
5540
5541 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5542 struct smb_version_values smb20_values = {
5543 .version_string = SMB20_VERSION_STRING,
5544 .protocol_id = SMB20_PROT_ID,
5545 .req_capabilities = 0, /* MBZ */
5546 .large_lock_type = 0,
5547 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5548 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5549 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5550 .header_size = sizeof(struct smb2_hdr),
5551 .header_preamble_size = 0,
5552 .max_header_size = MAX_SMB2_HDR_SIZE,
5553 .read_rsp_size = sizeof(struct smb2_read_rsp),
5554 .lock_cmd = SMB2_LOCK,
5555 .cap_unix = 0,
5556 .cap_nt_find = SMB2_NT_FIND,
5557 .cap_large_files = SMB2_LARGE_FILES,
5558 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5559 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5560 .create_lease_size = sizeof(struct create_lease),
5561 };
5562 #endif /* ALLOW_INSECURE_LEGACY */
5563
5564 struct smb_version_values smb21_values = {
5565 .version_string = SMB21_VERSION_STRING,
5566 .protocol_id = SMB21_PROT_ID,
5567 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5568 .large_lock_type = 0,
5569 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5570 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5571 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5572 .header_size = sizeof(struct smb2_hdr),
5573 .header_preamble_size = 0,
5574 .max_header_size = MAX_SMB2_HDR_SIZE,
5575 .read_rsp_size = sizeof(struct smb2_read_rsp),
5576 .lock_cmd = SMB2_LOCK,
5577 .cap_unix = 0,
5578 .cap_nt_find = SMB2_NT_FIND,
5579 .cap_large_files = SMB2_LARGE_FILES,
5580 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5581 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5582 .create_lease_size = sizeof(struct create_lease),
5583 };
5584
5585 struct smb_version_values smb3any_values = {
5586 .version_string = SMB3ANY_VERSION_STRING,
5587 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5588 .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,
5589 .large_lock_type = 0,
5590 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5591 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5592 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5593 .header_size = sizeof(struct smb2_hdr),
5594 .header_preamble_size = 0,
5595 .max_header_size = MAX_SMB2_HDR_SIZE,
5596 .read_rsp_size = sizeof(struct smb2_read_rsp),
5597 .lock_cmd = SMB2_LOCK,
5598 .cap_unix = 0,
5599 .cap_nt_find = SMB2_NT_FIND,
5600 .cap_large_files = SMB2_LARGE_FILES,
5601 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5602 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5603 .create_lease_size = sizeof(struct create_lease_v2),
5604 };
5605
5606 struct smb_version_values smbdefault_values = {
5607 .version_string = SMBDEFAULT_VERSION_STRING,
5608 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5609 .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,
5610 .large_lock_type = 0,
5611 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5612 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5613 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5614 .header_size = sizeof(struct smb2_hdr),
5615 .header_preamble_size = 0,
5616 .max_header_size = MAX_SMB2_HDR_SIZE,
5617 .read_rsp_size = sizeof(struct smb2_read_rsp),
5618 .lock_cmd = SMB2_LOCK,
5619 .cap_unix = 0,
5620 .cap_nt_find = SMB2_NT_FIND,
5621 .cap_large_files = SMB2_LARGE_FILES,
5622 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5623 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5624 .create_lease_size = sizeof(struct create_lease_v2),
5625 };
5626
5627 struct smb_version_values smb30_values = {
5628 .version_string = SMB30_VERSION_STRING,
5629 .protocol_id = SMB30_PROT_ID,
5630 .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,
5631 .large_lock_type = 0,
5632 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5633 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5634 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5635 .header_size = sizeof(struct smb2_hdr),
5636 .header_preamble_size = 0,
5637 .max_header_size = MAX_SMB2_HDR_SIZE,
5638 .read_rsp_size = sizeof(struct smb2_read_rsp),
5639 .lock_cmd = SMB2_LOCK,
5640 .cap_unix = 0,
5641 .cap_nt_find = SMB2_NT_FIND,
5642 .cap_large_files = SMB2_LARGE_FILES,
5643 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5644 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5645 .create_lease_size = sizeof(struct create_lease_v2),
5646 };
5647
5648 struct smb_version_values smb302_values = {
5649 .version_string = SMB302_VERSION_STRING,
5650 .protocol_id = SMB302_PROT_ID,
5651 .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,
5652 .large_lock_type = 0,
5653 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5654 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5655 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5656 .header_size = sizeof(struct smb2_hdr),
5657 .header_preamble_size = 0,
5658 .max_header_size = MAX_SMB2_HDR_SIZE,
5659 .read_rsp_size = sizeof(struct smb2_read_rsp),
5660 .lock_cmd = SMB2_LOCK,
5661 .cap_unix = 0,
5662 .cap_nt_find = SMB2_NT_FIND,
5663 .cap_large_files = SMB2_LARGE_FILES,
5664 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5665 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5666 .create_lease_size = sizeof(struct create_lease_v2),
5667 };
5668
5669 struct smb_version_values smb311_values = {
5670 .version_string = SMB311_VERSION_STRING,
5671 .protocol_id = SMB311_PROT_ID,
5672 .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,
5673 .large_lock_type = 0,
5674 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5675 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5676 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5677 .header_size = sizeof(struct smb2_hdr),
5678 .header_preamble_size = 0,
5679 .max_header_size = MAX_SMB2_HDR_SIZE,
5680 .read_rsp_size = sizeof(struct smb2_read_rsp),
5681 .lock_cmd = SMB2_LOCK,
5682 .cap_unix = 0,
5683 .cap_nt_find = SMB2_NT_FIND,
5684 .cap_large_files = SMB2_LARGE_FILES,
5685 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5686 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5687 .create_lease_size = sizeof(struct create_lease_v2),
5688 };
5689