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Linux 4.19.133
[linux/fpc-iii.git] / fs / cifs / smb2ops.c
blob2a523139a05fb87ceb70bfecfe94acb16c3adffb
1 /*
2 * SMB2 version specific operations
3 *
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
5 *
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include <linux/pagemap.h>
21 #include <linux/vfs.h>
22 #include <linux/falloc.h>
23 #include <linux/scatterlist.h>
24 #include <linux/uuid.h>
25 #include <crypto/aead.h>
26 #include "cifsglob.h"
27 #include "smb2pdu.h"
28 #include "smb2proto.h"
29 #include "cifsproto.h"
30 #include "cifs_debug.h"
31 #include "cifs_unicode.h"
32 #include "smb2status.h"
33 #include "smb2glob.h"
34 #include "cifs_ioctl.h"
35 #include "smbdirect.h"
36
37 /* Change credits for different ops and return the total number of credits */
38 static int
39 change_conf(struct TCP_Server_Info *server)
40 {
41 server->credits += server->echo_credits + server->oplock_credits;
42 server->oplock_credits = server->echo_credits = 0;
43 switch (server->credits) {
44 case 0:
45 return 0;
46 case 1:
47 server->echoes = false;
48 server->oplocks = false;
49 break;
50 case 2:
51 server->echoes = true;
52 server->oplocks = false;
53 server->echo_credits = 1;
54 break;
55 default:
56 server->echoes = true;
57 if (enable_oplocks) {
58 server->oplocks = true;
59 server->oplock_credits = 1;
60 } else
61 server->oplocks = false;
62
63 server->echo_credits = 1;
64 }
65 server->credits -= server->echo_credits + server->oplock_credits;
66 return server->credits + server->echo_credits + server->oplock_credits;
67 }
68
69 static void
70 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
71 const int optype)
72 {
73 int *val, rc = -1;
74
75 spin_lock(&server->req_lock);
76 val = server->ops->get_credits_field(server, optype);
77 *val += add;
78 if (*val > 65000) {
79 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
80 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
81 }
82 server->in_flight--;
83 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
84 rc = change_conf(server);
85 /*
86 * Sometimes server returns 0 credits on oplock break ack - we need to
87 * rebalance credits in this case.
88 */
89 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
90 server->oplocks) {
91 if (server->credits > 1) {
92 server->credits--;
93 server->oplock_credits++;
94 }
95 }
96 spin_unlock(&server->req_lock);
97 wake_up(&server->request_q);
98
99 if (server->tcpStatus == CifsNeedReconnect)
100 return;
101
102 switch (rc) {
103 case -1:
104 /* change_conf hasn't been executed */
105 break;
106 case 0:
107 cifs_dbg(VFS, "Possible client or server bug - zero credits\n");
108 break;
109 case 1:
110 cifs_dbg(VFS, "disabling echoes and oplocks\n");
111 break;
112 case 2:
113 cifs_dbg(FYI, "disabling oplocks\n");
114 break;
115 default:
116 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
117 }
118 }
119
120 static void
121 smb2_set_credits(struct TCP_Server_Info *server, const int val)
122 {
123 spin_lock(&server->req_lock);
124 server->credits = val;
125 spin_unlock(&server->req_lock);
126 }
127
128 static int *
129 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
130 {
131 switch (optype) {
132 case CIFS_ECHO_OP:
133 return &server->echo_credits;
134 case CIFS_OBREAK_OP:
135 return &server->oplock_credits;
136 default:
137 return &server->credits;
138 }
139 }
140
141 static unsigned int
142 smb2_get_credits(struct mid_q_entry *mid)
143 {
144 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
145
146 return le16_to_cpu(shdr->CreditRequest);
147 }
148
149 static int
150 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
151 unsigned int *num, unsigned int *credits)
152 {
153 int rc = 0;
154 unsigned int scredits;
155
156 spin_lock(&server->req_lock);
157 while (1) {
158 if (server->credits <= 0) {
159 spin_unlock(&server->req_lock);
160 cifs_num_waiters_inc(server);
161 rc = wait_event_killable(server->request_q,
162 has_credits(server, &server->credits));
163 cifs_num_waiters_dec(server);
164 if (rc)
165 return rc;
166 spin_lock(&server->req_lock);
167 } else {
168 if (server->tcpStatus == CifsExiting) {
169 spin_unlock(&server->req_lock);
170 return -ENOENT;
171 }
172
173 scredits = server->credits;
174 /* can deadlock with reopen */
175 if (scredits <= 8) {
176 *num = SMB2_MAX_BUFFER_SIZE;
177 *credits = 0;
178 break;
179 }
180
181 /* leave some credits for reopen and other ops */
182 scredits -= 8;
183 *num = min_t(unsigned int, size,
184 scredits * SMB2_MAX_BUFFER_SIZE);
185
186 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
187 server->credits -= *credits;
188 server->in_flight++;
189 break;
190 }
191 }
192 spin_unlock(&server->req_lock);
193 return rc;
194 }
195
196 static __u64
197 smb2_get_next_mid(struct TCP_Server_Info *server)
198 {
199 __u64 mid;
200 /* for SMB2 we need the current value */
201 spin_lock(&GlobalMid_Lock);
202 mid = server->CurrentMid++;
203 spin_unlock(&GlobalMid_Lock);
204 return mid;
205 }
206
207 static void
208 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
209 {
210 spin_lock(&GlobalMid_Lock);
211 if (server->CurrentMid >= val)
212 server->CurrentMid -= val;
213 spin_unlock(&GlobalMid_Lock);
214 }
215
216 static struct mid_q_entry *
217 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
218 {
219 struct mid_q_entry *mid;
220 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
221 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
222
223 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
224 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
225 return NULL;
226 }
227
228 spin_lock(&GlobalMid_Lock);
229 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
230 if ((mid->mid == wire_mid) &&
231 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
232 (mid->command == shdr->Command)) {
233 kref_get(&mid->refcount);
234 spin_unlock(&GlobalMid_Lock);
235 return mid;
236 }
237 }
238 spin_unlock(&GlobalMid_Lock);
239 return NULL;
240 }
241
242 static void
243 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
244 {
245 #ifdef CONFIG_CIFS_DEBUG2
246 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
247
248 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
249 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
250 shdr->ProcessId);
251 cifs_dbg(VFS, "smb buf %p len %u\n", buf,
252 server->ops->calc_smb_size(buf, server));
253 #endif
254 }
255
256 static bool
257 smb2_need_neg(struct TCP_Server_Info *server)
258 {
259 return server->max_read == 0;
260 }
261
262 static int
263 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
264 {
265 int rc;
266 ses->server->CurrentMid = 0;
267 rc = SMB2_negotiate(xid, ses);
268 /* BB we probably don't need to retry with modern servers */
269 if (rc == -EAGAIN)
270 rc = -EHOSTDOWN;
271 return rc;
272 }
273
274 static unsigned int
275 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
276 {
277 struct TCP_Server_Info *server = tcon->ses->server;
278 unsigned int wsize;
279
280 /* start with specified wsize, or default */
281 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
282 wsize = min_t(unsigned int, wsize, server->max_write);
283 #ifdef CONFIG_CIFS_SMB_DIRECT
284 if (server->rdma) {
285 if (server->sign)
286 wsize = min_t(unsigned int,
287 wsize, server->smbd_conn->max_fragmented_send_size);
288 else
289 wsize = min_t(unsigned int,
290 wsize, server->smbd_conn->max_readwrite_size);
291 }
292 #endif
293 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
294 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
295
296 return wsize;
297 }
298
299 static unsigned int
300 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
301 {
302 struct TCP_Server_Info *server = tcon->ses->server;
303 unsigned int rsize;
304
305 /* start with specified rsize, or default */
306 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
307 rsize = min_t(unsigned int, rsize, server->max_read);
308 #ifdef CONFIG_CIFS_SMB_DIRECT
309 if (server->rdma) {
310 if (server->sign)
311 rsize = min_t(unsigned int,
312 rsize, server->smbd_conn->max_fragmented_recv_size);
313 else
314 rsize = min_t(unsigned int,
315 rsize, server->smbd_conn->max_readwrite_size);
316 }
317 #endif
318
319 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
320 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
321
322 return rsize;
323 }
324
325
326 static int
327 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
328 size_t buf_len,
329 struct cifs_server_iface **iface_list,
330 size_t *iface_count)
331 {
332 struct network_interface_info_ioctl_rsp *p;
333 struct sockaddr_in *addr4;
334 struct sockaddr_in6 *addr6;
335 struct iface_info_ipv4 *p4;
336 struct iface_info_ipv6 *p6;
337 struct cifs_server_iface *info;
338 ssize_t bytes_left;
339 size_t next = 0;
340 int nb_iface = 0;
341 int rc = 0;
342
343 *iface_list = NULL;
344 *iface_count = 0;
345
346 /*
347 * Fist pass: count and sanity check
348 */
349
350 bytes_left = buf_len;
351 p = buf;
352 while (bytes_left >= sizeof(*p)) {
353 nb_iface++;
354 next = le32_to_cpu(p->Next);
355 if (!next) {
356 bytes_left -= sizeof(*p);
357 break;
358 }
359 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
360 bytes_left -= next;
361 }
362
363 if (!nb_iface) {
364 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
365 rc = -EINVAL;
366 goto out;
367 }
368
369 if (bytes_left || p->Next)
370 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
371
372
373 /*
374 * Second pass: extract info to internal structure
375 */
376
377 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
378 if (!*iface_list) {
379 rc = -ENOMEM;
380 goto out;
381 }
382
383 info = *iface_list;
384 bytes_left = buf_len;
385 p = buf;
386 while (bytes_left >= sizeof(*p)) {
387 info->speed = le64_to_cpu(p->LinkSpeed);
388 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
389 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
390
391 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
392 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
393 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
394 le32_to_cpu(p->Capability));
395
396 switch (p->Family) {
397 /*
398 * The kernel and wire socket structures have the same
399 * layout and use network byte order but make the
400 * conversion explicit in case either one changes.
401 */
402 case INTERNETWORK:
403 addr4 = (struct sockaddr_in *)&info->sockaddr;
404 p4 = (struct iface_info_ipv4 *)p->Buffer;
405 addr4->sin_family = AF_INET;
406 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
407
408 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
409 addr4->sin_port = cpu_to_be16(CIFS_PORT);
410
411 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
412 &addr4->sin_addr);
413 break;
414 case INTERNETWORKV6:
415 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
416 p6 = (struct iface_info_ipv6 *)p->Buffer;
417 addr6->sin6_family = AF_INET6;
418 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
419
420 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
421 addr6->sin6_flowinfo = 0;
422 addr6->sin6_scope_id = 0;
423 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
424
425 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
426 &addr6->sin6_addr);
427 break;
428 default:
429 cifs_dbg(VFS,
430 "%s: skipping unsupported socket family\n",
431 __func__);
432 goto next_iface;
433 }
434
435 (*iface_count)++;
436 info++;
437 next_iface:
438 next = le32_to_cpu(p->Next);
439 if (!next)
440 break;
441 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
442 bytes_left -= next;
443 }
444
445 if (!*iface_count) {
446 rc = -EINVAL;
447 goto out;
448 }
449
450 out:
451 if (rc) {
452 kfree(*iface_list);
453 *iface_count = 0;
454 *iface_list = NULL;
455 }
456 return rc;
457 }
458
459
460 static int
461 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
462 {
463 int rc;
464 unsigned int ret_data_len = 0;
465 struct network_interface_info_ioctl_rsp *out_buf = NULL;
466 struct cifs_server_iface *iface_list;
467 size_t iface_count;
468 struct cifs_ses *ses = tcon->ses;
469
470 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
471 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
472 NULL /* no data input */, 0 /* no data input */,
473 (char **)&out_buf, &ret_data_len);
474 if (rc == -EOPNOTSUPP) {
475 cifs_dbg(FYI,
476 "server does not support query network interfaces\n");
477 goto out;
478 } else if (rc != 0) {
479 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
480 goto out;
481 }
482
483 rc = parse_server_interfaces(out_buf, ret_data_len,
484 &iface_list, &iface_count);
485 if (rc)
486 goto out;
487
488 spin_lock(&ses->iface_lock);
489 kfree(ses->iface_list);
490 ses->iface_list = iface_list;
491 ses->iface_count = iface_count;
492 ses->iface_last_update = jiffies;
493 spin_unlock(&ses->iface_lock);
494
495 out:
496 kfree(out_buf);
497 return rc;
498 }
499
500 static void
501 smb2_close_cached_fid(struct kref *ref)
502 {
503 struct cached_fid *cfid = container_of(ref, struct cached_fid,
504 refcount);
505
506 if (cfid->is_valid) {
507 cifs_dbg(FYI, "clear cached root file handle\n");
508 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
509 cfid->fid->volatile_fid);
510 cfid->is_valid = false;
511 }
512 }
513
514 void close_shroot(struct cached_fid *cfid)
515 {
516 mutex_lock(&cfid->fid_mutex);
517 kref_put(&cfid->refcount, smb2_close_cached_fid);
518 mutex_unlock(&cfid->fid_mutex);
519 }
520
521 void
522 smb2_cached_lease_break(struct work_struct *work)
523 {
524 struct cached_fid *cfid = container_of(work,
525 struct cached_fid, lease_break);
526
527 close_shroot(cfid);
528 }
529
530 /*
531 * Open the directory at the root of a share
532 */
533 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
534 {
535 struct cifs_open_parms oparams;
536 int rc;
537 __le16 srch_path = 0; /* Null - since an open of top of share */
538 u8 oplock = SMB2_OPLOCK_LEVEL_II;
539
540 mutex_lock(&tcon->crfid.fid_mutex);
541 if (tcon->crfid.is_valid) {
542 cifs_dbg(FYI, "found a cached root file handle\n");
543 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
544 kref_get(&tcon->crfid.refcount);
545 mutex_unlock(&tcon->crfid.fid_mutex);
546 return 0;
547 }
548
549 oparams.tcon = tcon;
550 oparams.create_options = 0;
551 oparams.desired_access = FILE_READ_ATTRIBUTES;
552 oparams.disposition = FILE_OPEN;
553 oparams.fid = pfid;
554 oparams.reconnect = false;
555
556 /*
557 * We do not hold the lock for the open because in case
558 * SMB2_open needs to reconnect, it will end up calling
559 * cifs_mark_open_files_invalid() which takes the lock again
560 * thus causing a deadlock
561 */
562 mutex_unlock(&tcon->crfid.fid_mutex);
563 rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
564 mutex_lock(&tcon->crfid.fid_mutex);
565
566 /*
567 * Now we need to check again as the cached root might have
568 * been successfully re-opened from a concurrent process
569 */
570
571 if (tcon->crfid.is_valid) {
572 /* work was already done */
573
574 /* stash fids for close() later */
575 struct cifs_fid fid = {
576 .persistent_fid = pfid->persistent_fid,
577 .volatile_fid = pfid->volatile_fid,
578 };
579
580 /*
581 * Caller expects this func to set pfid to a valid
582 * cached root, so we copy the existing one and get a
583 * reference
584 */
585 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
586 kref_get(&tcon->crfid.refcount);
587
588 mutex_unlock(&tcon->crfid.fid_mutex);
589
590 if (rc == 0) {
591 /* close extra handle outside of critical section */
592 SMB2_close(xid, tcon, fid.persistent_fid,
593 fid.volatile_fid);
594 }
595 return 0;
596 }
597
598 /* Cached root is still invalid, continue normaly */
599
600 if (rc == 0) {
601 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
602 tcon->crfid.tcon = tcon;
603 tcon->crfid.is_valid = true;
604 kref_init(&tcon->crfid.refcount);
605 kref_get(&tcon->crfid.refcount);
606 }
607
608 mutex_unlock(&tcon->crfid.fid_mutex);
609 return rc;
610 }
611
612 static void
613 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
614 {
615 int rc;
616 __le16 srch_path = 0; /* Null - open root of share */
617 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
618 struct cifs_open_parms oparms;
619 struct cifs_fid fid;
620 bool no_cached_open = tcon->nohandlecache;
621
622 oparms.tcon = tcon;
623 oparms.desired_access = FILE_READ_ATTRIBUTES;
624 oparms.disposition = FILE_OPEN;
625 oparms.create_options = 0;
626 oparms.fid = &fid;
627 oparms.reconnect = false;
628
629 if (no_cached_open)
630 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
631 NULL);
632 else
633 rc = open_shroot(xid, tcon, &fid);
634
635 if (rc)
636 return;
637
638 SMB3_request_interfaces(xid, tcon);
639
640 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
641 FS_ATTRIBUTE_INFORMATION);
642 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
643 FS_DEVICE_INFORMATION);
644 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
645 FS_VOLUME_INFORMATION);
646 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
647 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
648 if (no_cached_open)
649 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
650 else
651 close_shroot(&tcon->crfid);
652
653 return;
654 }
655
656 static void
657 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
658 {
659 int rc;
660 __le16 srch_path = 0; /* Null - open root of share */
661 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
662 struct cifs_open_parms oparms;
663 struct cifs_fid fid;
664
665 oparms.tcon = tcon;
666 oparms.desired_access = FILE_READ_ATTRIBUTES;
667 oparms.disposition = FILE_OPEN;
668 oparms.create_options = 0;
669 oparms.fid = &fid;
670 oparms.reconnect = false;
671
672 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
673 if (rc)
674 return;
675
676 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
677 FS_ATTRIBUTE_INFORMATION);
678 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
679 FS_DEVICE_INFORMATION);
680 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
681 return;
682 }
683
684 static int
685 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
686 struct cifs_sb_info *cifs_sb, const char *full_path)
687 {
688 int rc;
689 __le16 *utf16_path;
690 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
691 struct cifs_open_parms oparms;
692 struct cifs_fid fid;
693
694 if ((*full_path == 0) && tcon->crfid.is_valid)
695 return 0;
696
697 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
698 if (!utf16_path)
699 return -ENOMEM;
700
701 oparms.tcon = tcon;
702 oparms.desired_access = FILE_READ_ATTRIBUTES;
703 oparms.disposition = FILE_OPEN;
704 if (backup_cred(cifs_sb))
705 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
706 else
707 oparms.create_options = 0;
708 oparms.fid = &fid;
709 oparms.reconnect = false;
710
711 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
712 if (rc) {
713 kfree(utf16_path);
714 return rc;
715 }
716
717 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
718 kfree(utf16_path);
719 return rc;
720 }
721
722 static int
723 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
724 struct cifs_sb_info *cifs_sb, const char *full_path,
725 u64 *uniqueid, FILE_ALL_INFO *data)
726 {
727 *uniqueid = le64_to_cpu(data->IndexNumber);
728 return 0;
729 }
730
731 static int
732 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
733 struct cifs_fid *fid, FILE_ALL_INFO *data)
734 {
735 int rc;
736 struct smb2_file_all_info *smb2_data;
737
738 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
739 GFP_KERNEL);
740 if (smb2_data == NULL)
741 return -ENOMEM;
742
743 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
744 smb2_data);
745 if (!rc)
746 move_smb2_info_to_cifs(data, smb2_data);
747 kfree(smb2_data);
748 return rc;
749 }
750
751 #ifdef CONFIG_CIFS_XATTR
752 static ssize_t
753 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
754 struct smb2_file_full_ea_info *src, size_t src_size,
755 const unsigned char *ea_name)
756 {
757 int rc = 0;
758 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
759 char *name, *value;
760 size_t buf_size = dst_size;
761 size_t name_len, value_len, user_name_len;
762
763 while (src_size > 0) {
764 name = &src->ea_data[0];
765 name_len = (size_t)src->ea_name_length;
766 value = &src->ea_data[src->ea_name_length + 1];
767 value_len = (size_t)le16_to_cpu(src->ea_value_length);
768
769 if (name_len == 0) {
770 break;
771 }
772
773 if (src_size < 8 + name_len + 1 + value_len) {
774 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
775 rc = -EIO;
776 goto out;
777 }
778
779 if (ea_name) {
780 if (ea_name_len == name_len &&
781 memcmp(ea_name, name, name_len) == 0) {
782 rc = value_len;
783 if (dst_size == 0)
784 goto out;
785 if (dst_size < value_len) {
786 rc = -ERANGE;
787 goto out;
788 }
789 memcpy(dst, value, value_len);
790 goto out;
791 }
792 } else {
793 /* 'user.' plus a terminating null */
794 user_name_len = 5 + 1 + name_len;
795
796 if (buf_size == 0) {
797 /* skip copy - calc size only */
798 rc += user_name_len;
799 } else if (dst_size >= user_name_len) {
800 dst_size -= user_name_len;
801 memcpy(dst, "user.", 5);
802 dst += 5;
803 memcpy(dst, src->ea_data, name_len);
804 dst += name_len;
805 *dst = 0;
806 ++dst;
807 rc += user_name_len;
808 } else {
809 /* stop before overrun buffer */
810 rc = -ERANGE;
811 break;
812 }
813 }
814
815 if (!src->next_entry_offset)
816 break;
817
818 if (src_size < le32_to_cpu(src->next_entry_offset)) {
819 /* stop before overrun buffer */
820 rc = -ERANGE;
821 break;
822 }
823 src_size -= le32_to_cpu(src->next_entry_offset);
824 src = (void *)((char *)src +
825 le32_to_cpu(src->next_entry_offset));
826 }
827
828 /* didn't find the named attribute */
829 if (ea_name)
830 rc = -ENODATA;
831
832 out:
833 return (ssize_t)rc;
834 }
835
836 static ssize_t
837 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
838 const unsigned char *path, const unsigned char *ea_name,
839 char *ea_data, size_t buf_size,
840 struct cifs_sb_info *cifs_sb)
841 {
842 int rc;
843 __le16 *utf16_path;
844 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
845 struct cifs_open_parms oparms;
846 struct cifs_fid fid;
847 struct smb2_file_full_ea_info *smb2_data;
848 int ea_buf_size = SMB2_MIN_EA_BUF;
849
850 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
851 if (!utf16_path)
852 return -ENOMEM;
853
854 oparms.tcon = tcon;
855 oparms.desired_access = FILE_READ_EA;
856 oparms.disposition = FILE_OPEN;
857 if (backup_cred(cifs_sb))
858 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
859 else
860 oparms.create_options = 0;
861 oparms.fid = &fid;
862 oparms.reconnect = false;
863
864 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
865 kfree(utf16_path);
866 if (rc) {
867 cifs_dbg(FYI, "open failed rc=%d\n", rc);
868 return rc;
869 }
870
871 while (1) {
872 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
873 if (smb2_data == NULL) {
874 SMB2_close(xid, tcon, fid.persistent_fid,
875 fid.volatile_fid);
876 return -ENOMEM;
877 }
878
879 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
880 fid.volatile_fid,
881 ea_buf_size, smb2_data);
882
883 if (rc != -E2BIG)
884 break;
885
886 kfree(smb2_data);
887 ea_buf_size <<= 1;
888
889 if (ea_buf_size > SMB2_MAX_EA_BUF) {
890 cifs_dbg(VFS, "EA size is too large\n");
891 SMB2_close(xid, tcon, fid.persistent_fid,
892 fid.volatile_fid);
893 return -ENOMEM;
894 }
895 }
896
897 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
898
899 /*
900 * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
901 * not an error. Otherwise, the specified ea_name was not found.
902 */
903 if (!rc)
904 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
905 SMB2_MAX_EA_BUF, ea_name);
906 else if (!ea_name && rc == -ENODATA)
907 rc = 0;
908
909 kfree(smb2_data);
910 return rc;
911 }
912
913
914 static int
915 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
916 const char *path, const char *ea_name, const void *ea_value,
917 const __u16 ea_value_len, const struct nls_table *nls_codepage,
918 struct cifs_sb_info *cifs_sb)
919 {
920 int rc;
921 __le16 *utf16_path;
922 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
923 struct cifs_open_parms oparms;
924 struct cifs_fid fid;
925 struct smb2_file_full_ea_info *ea;
926 int ea_name_len = strlen(ea_name);
927 int len;
928
929 if (ea_name_len > 255)
930 return -EINVAL;
931
932 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
933 if (!utf16_path)
934 return -ENOMEM;
935
936 oparms.tcon = tcon;
937 oparms.desired_access = FILE_WRITE_EA;
938 oparms.disposition = FILE_OPEN;
939 if (backup_cred(cifs_sb))
940 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
941 else
942 oparms.create_options = 0;
943 oparms.fid = &fid;
944 oparms.reconnect = false;
945
946 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
947 kfree(utf16_path);
948 if (rc) {
949 cifs_dbg(FYI, "open failed rc=%d\n", rc);
950 return rc;
951 }
952
953 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
954 ea = kzalloc(len, GFP_KERNEL);
955 if (ea == NULL) {
956 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
957 return -ENOMEM;
958 }
959
960 ea->ea_name_length = ea_name_len;
961 ea->ea_value_length = cpu_to_le16(ea_value_len);
962 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
963 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
964
965 rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
966 len);
967 kfree(ea);
968
969 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
970
971 return rc;
972 }
973 #endif
974
975 static bool
976 smb2_can_echo(struct TCP_Server_Info *server)
977 {
978 return server->echoes;
979 }
980
981 static void
982 smb2_clear_stats(struct cifs_tcon *tcon)
983 {
984 int i;
985 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
986 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
987 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
988 }
989 }
990
991 static void
992 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
993 {
994 seq_puts(m, "\n\tShare Capabilities:");
995 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
996 seq_puts(m, " DFS,");
997 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
998 seq_puts(m, " CONTINUOUS AVAILABILITY,");
999 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1000 seq_puts(m, " SCALEOUT,");
1001 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1002 seq_puts(m, " CLUSTER,");
1003 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1004 seq_puts(m, " ASYMMETRIC,");
1005 if (tcon->capabilities == 0)
1006 seq_puts(m, " None");
1007 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1008 seq_puts(m, " Aligned,");
1009 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1010 seq_puts(m, " Partition Aligned,");
1011 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1012 seq_puts(m, " SSD,");
1013 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1014 seq_puts(m, " TRIM-support,");
1015
1016 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1017 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1018 if (tcon->perf_sector_size)
1019 seq_printf(m, "\tOptimal sector size: 0x%x",
1020 tcon->perf_sector_size);
1021 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1022 }
1023
1024 static void
1025 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1026 {
1027 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1028 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1029
1030 /*
1031 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1032 * totals (requests sent) since those SMBs are per-session not per tcon
1033 */
1034 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1035 (long long)(tcon->bytes_read),
1036 (long long)(tcon->bytes_written));
1037 seq_printf(m, "\nTreeConnects: %d total %d failed",
1038 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1039 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1040 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1041 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1042 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1043 seq_printf(m, "\nCreates: %d total %d failed",
1044 atomic_read(&sent[SMB2_CREATE_HE]),
1045 atomic_read(&failed[SMB2_CREATE_HE]));
1046 seq_printf(m, "\nCloses: %d total %d failed",
1047 atomic_read(&sent[SMB2_CLOSE_HE]),
1048 atomic_read(&failed[SMB2_CLOSE_HE]));
1049 seq_printf(m, "\nFlushes: %d total %d failed",
1050 atomic_read(&sent[SMB2_FLUSH_HE]),
1051 atomic_read(&failed[SMB2_FLUSH_HE]));
1052 seq_printf(m, "\nReads: %d total %d failed",
1053 atomic_read(&sent[SMB2_READ_HE]),
1054 atomic_read(&failed[SMB2_READ_HE]));
1055 seq_printf(m, "\nWrites: %d total %d failed",
1056 atomic_read(&sent[SMB2_WRITE_HE]),
1057 atomic_read(&failed[SMB2_WRITE_HE]));
1058 seq_printf(m, "\nLocks: %d total %d failed",
1059 atomic_read(&sent[SMB2_LOCK_HE]),
1060 atomic_read(&failed[SMB2_LOCK_HE]));
1061 seq_printf(m, "\nIOCTLs: %d total %d failed",
1062 atomic_read(&sent[SMB2_IOCTL_HE]),
1063 atomic_read(&failed[SMB2_IOCTL_HE]));
1064 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1065 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1066 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1067 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1068 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1069 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1070 seq_printf(m, "\nQueryInfos: %d total %d failed",
1071 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1072 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1073 seq_printf(m, "\nSetInfos: %d total %d failed",
1074 atomic_read(&sent[SMB2_SET_INFO_HE]),
1075 atomic_read(&failed[SMB2_SET_INFO_HE]));
1076 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1077 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1078 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1079 }
1080
1081 static void
1082 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1083 {
1084 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1085 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1086
1087 cfile->fid.persistent_fid = fid->persistent_fid;
1088 cfile->fid.volatile_fid = fid->volatile_fid;
1089 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1090 &fid->purge_cache);
1091 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1092 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1093 }
1094
1095 static void
1096 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1097 struct cifs_fid *fid)
1098 {
1099 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1100 }
1101
1102 static int
1103 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1104 u64 persistent_fid, u64 volatile_fid,
1105 struct copychunk_ioctl *pcchunk)
1106 {
1107 int rc;
1108 unsigned int ret_data_len;
1109 struct resume_key_req *res_key;
1110
1111 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1112 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1113 NULL, 0 /* no input */,
1114 (char **)&res_key, &ret_data_len);
1115
1116 if (rc) {
1117 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1118 goto req_res_key_exit;
1119 }
1120 if (ret_data_len < sizeof(struct resume_key_req)) {
1121 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1122 rc = -EINVAL;
1123 goto req_res_key_exit;
1124 }
1125 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1126
1127 req_res_key_exit:
1128 kfree(res_key);
1129 return rc;
1130 }
1131
1132 static ssize_t
1133 smb2_copychunk_range(const unsigned int xid,
1134 struct cifsFileInfo *srcfile,
1135 struct cifsFileInfo *trgtfile, u64 src_off,
1136 u64 len, u64 dest_off)
1137 {
1138 int rc;
1139 unsigned int ret_data_len;
1140 struct copychunk_ioctl *pcchunk;
1141 struct copychunk_ioctl_rsp *retbuf = NULL;
1142 struct cifs_tcon *tcon;
1143 int chunks_copied = 0;
1144 bool chunk_sizes_updated = false;
1145 ssize_t bytes_written, total_bytes_written = 0;
1146
1147 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1148
1149 if (pcchunk == NULL)
1150 return -ENOMEM;
1151
1152 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
1153 /* Request a key from the server to identify the source of the copy */
1154 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1155 srcfile->fid.persistent_fid,
1156 srcfile->fid.volatile_fid, pcchunk);
1157
1158 /* Note: request_res_key sets res_key null only if rc !=0 */
1159 if (rc)
1160 goto cchunk_out;
1161
1162 /* For now array only one chunk long, will make more flexible later */
1163 pcchunk->ChunkCount = cpu_to_le32(1);
1164 pcchunk->Reserved = 0;
1165 pcchunk->Reserved2 = 0;
1166
1167 tcon = tlink_tcon(trgtfile->tlink);
1168
1169 while (len > 0) {
1170 pcchunk->SourceOffset = cpu_to_le64(src_off);
1171 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1172 pcchunk->Length =
1173 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1174
1175 /* Request server copy to target from src identified by key */
1176 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1177 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1178 true /* is_fsctl */, (char *)pcchunk,
1179 sizeof(struct copychunk_ioctl), (char **)&retbuf,
1180 &ret_data_len);
1181 if (rc == 0) {
1182 if (ret_data_len !=
1183 sizeof(struct copychunk_ioctl_rsp)) {
1184 cifs_dbg(VFS, "invalid cchunk response size\n");
1185 rc = -EIO;
1186 goto cchunk_out;
1187 }
1188 if (retbuf->TotalBytesWritten == 0) {
1189 cifs_dbg(FYI, "no bytes copied\n");
1190 rc = -EIO;
1191 goto cchunk_out;
1192 }
1193 /*
1194 * Check if server claimed to write more than we asked
1195 */
1196 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1197 le32_to_cpu(pcchunk->Length)) {
1198 cifs_dbg(VFS, "invalid copy chunk response\n");
1199 rc = -EIO;
1200 goto cchunk_out;
1201 }
1202 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1203 cifs_dbg(VFS, "invalid num chunks written\n");
1204 rc = -EIO;
1205 goto cchunk_out;
1206 }
1207 chunks_copied++;
1208
1209 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1210 src_off += bytes_written;
1211 dest_off += bytes_written;
1212 len -= bytes_written;
1213 total_bytes_written += bytes_written;
1214
1215 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1216 le32_to_cpu(retbuf->ChunksWritten),
1217 le32_to_cpu(retbuf->ChunkBytesWritten),
1218 bytes_written);
1219 } else if (rc == -EINVAL) {
1220 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1221 goto cchunk_out;
1222
1223 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1224 le32_to_cpu(retbuf->ChunksWritten),
1225 le32_to_cpu(retbuf->ChunkBytesWritten),
1226 le32_to_cpu(retbuf->TotalBytesWritten));
1227
1228 /*
1229 * Check if this is the first request using these sizes,
1230 * (ie check if copy succeed once with original sizes
1231 * and check if the server gave us different sizes after
1232 * we already updated max sizes on previous request).
1233 * if not then why is the server returning an error now
1234 */
1235 if ((chunks_copied != 0) || chunk_sizes_updated)
1236 goto cchunk_out;
1237
1238 /* Check that server is not asking us to grow size */
1239 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1240 tcon->max_bytes_chunk)
1241 tcon->max_bytes_chunk =
1242 le32_to_cpu(retbuf->ChunkBytesWritten);
1243 else
1244 goto cchunk_out; /* server gave us bogus size */
1245
1246 /* No need to change MaxChunks since already set to 1 */
1247 chunk_sizes_updated = true;
1248 } else
1249 goto cchunk_out;
1250 }
1251
1252 cchunk_out:
1253 kfree(pcchunk);
1254 kfree(retbuf);
1255 if (rc)
1256 return rc;
1257 else
1258 return total_bytes_written;
1259 }
1260
1261 static int
1262 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1263 struct cifs_fid *fid)
1264 {
1265 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1266 }
1267
1268 static unsigned int
1269 smb2_read_data_offset(char *buf)
1270 {
1271 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1272 return rsp->DataOffset;
1273 }
1274
1275 static unsigned int
1276 smb2_read_data_length(char *buf, bool in_remaining)
1277 {
1278 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1279
1280 if (in_remaining)
1281 return le32_to_cpu(rsp->DataRemaining);
1282
1283 return le32_to_cpu(rsp->DataLength);
1284 }
1285
1286
1287 static int
1288 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1289 struct cifs_io_parms *parms, unsigned int *bytes_read,
1290 char **buf, int *buf_type)
1291 {
1292 parms->persistent_fid = pfid->persistent_fid;
1293 parms->volatile_fid = pfid->volatile_fid;
1294 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1295 }
1296
1297 static int
1298 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1299 struct cifs_io_parms *parms, unsigned int *written,
1300 struct kvec *iov, unsigned long nr_segs)
1301 {
1302
1303 parms->persistent_fid = pfid->persistent_fid;
1304 parms->volatile_fid = pfid->volatile_fid;
1305 return SMB2_write(xid, parms, written, iov, nr_segs);
1306 }
1307
1308 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1309 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1310 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1311 {
1312 struct cifsInodeInfo *cifsi;
1313 int rc;
1314
1315 cifsi = CIFS_I(inode);
1316
1317 /* if file already sparse don't bother setting sparse again */
1318 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1319 return true; /* already sparse */
1320
1321 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1322 return true; /* already not sparse */
1323
1324 /*
1325 * Can't check for sparse support on share the usual way via the
1326 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1327 * since Samba server doesn't set the flag on the share, yet
1328 * supports the set sparse FSCTL and returns sparse correctly
1329 * in the file attributes. If we fail setting sparse though we
1330 * mark that server does not support sparse files for this share
1331 * to avoid repeatedly sending the unsupported fsctl to server
1332 * if the file is repeatedly extended.
1333 */
1334 if (tcon->broken_sparse_sup)
1335 return false;
1336
1337 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1338 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1339 true /* is_fctl */,
1340 &setsparse, 1, NULL, NULL);
1341 if (rc) {
1342 tcon->broken_sparse_sup = true;
1343 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1344 return false;
1345 }
1346
1347 if (setsparse)
1348 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1349 else
1350 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1351
1352 return true;
1353 }
1354
1355 static int
1356 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1357 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1358 {
1359 __le64 eof = cpu_to_le64(size);
1360 struct inode *inode;
1361
1362 /*
1363 * If extending file more than one page make sparse. Many Linux fs
1364 * make files sparse by default when extending via ftruncate
1365 */
1366 inode = d_inode(cfile->dentry);
1367
1368 if (!set_alloc && (size > inode->i_size + 8192)) {
1369 __u8 set_sparse = 1;
1370
1371 /* whether set sparse succeeds or not, extend the file */
1372 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1373 }
1374
1375 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1376 cfile->fid.volatile_fid, cfile->pid, &eof, false);
1377 }
1378
1379 static int
1380 smb2_duplicate_extents(const unsigned int xid,
1381 struct cifsFileInfo *srcfile,
1382 struct cifsFileInfo *trgtfile, u64 src_off,
1383 u64 len, u64 dest_off)
1384 {
1385 int rc;
1386 unsigned int ret_data_len;
1387 struct duplicate_extents_to_file dup_ext_buf;
1388 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1389
1390 /* server fileays advertise duplicate extent support with this flag */
1391 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1392 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1393 return -EOPNOTSUPP;
1394
1395 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1396 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1397 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1398 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1399 dup_ext_buf.ByteCount = cpu_to_le64(len);
1400 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1401 src_off, dest_off, len);
1402
1403 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1404 if (rc)
1405 goto duplicate_extents_out;
1406
1407 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1408 trgtfile->fid.volatile_fid,
1409 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1410 true /* is_fsctl */,
1411 (char *)&dup_ext_buf,
1412 sizeof(struct duplicate_extents_to_file),
1413 NULL,
1414 &ret_data_len);
1415
1416 if (ret_data_len > 0)
1417 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1418
1419 duplicate_extents_out:
1420 return rc;
1421 }
1422
1423 static int
1424 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1425 struct cifsFileInfo *cfile)
1426 {
1427 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1428 cfile->fid.volatile_fid);
1429 }
1430
1431 static int
1432 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1433 struct cifsFileInfo *cfile)
1434 {
1435 struct fsctl_set_integrity_information_req integr_info;
1436 unsigned int ret_data_len;
1437
1438 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1439 integr_info.Flags = 0;
1440 integr_info.Reserved = 0;
1441
1442 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1443 cfile->fid.volatile_fid,
1444 FSCTL_SET_INTEGRITY_INFORMATION,
1445 true /* is_fsctl */,
1446 (char *)&integr_info,
1447 sizeof(struct fsctl_set_integrity_information_req),
1448 NULL,
1449 &ret_data_len);
1450
1451 }
1452
1453 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1454 #define GMT_TOKEN_SIZE 50
1455
1456 /*
1457 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1458 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1459 */
1460 static int
1461 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1462 struct cifsFileInfo *cfile, void __user *ioc_buf)
1463 {
1464 char *retbuf = NULL;
1465 unsigned int ret_data_len = 0;
1466 int rc;
1467 struct smb_snapshot_array snapshot_in;
1468
1469 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1470 cfile->fid.volatile_fid,
1471 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1472 true /* is_fsctl */,
1473 NULL, 0 /* no input data */,
1474 (char **)&retbuf,
1475 &ret_data_len);
1476 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1477 rc, ret_data_len);
1478 if (rc)
1479 return rc;
1480
1481 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1482 /* Fixup buffer */
1483 if (copy_from_user(&snapshot_in, ioc_buf,
1484 sizeof(struct smb_snapshot_array))) {
1485 rc = -EFAULT;
1486 kfree(retbuf);
1487 return rc;
1488 }
1489
1490 /*
1491 * Check for min size, ie not large enough to fit even one GMT
1492 * token (snapshot). On the first ioctl some users may pass in
1493 * smaller size (or zero) to simply get the size of the array
1494 * so the user space caller can allocate sufficient memory
1495 * and retry the ioctl again with larger array size sufficient
1496 * to hold all of the snapshot GMT tokens on the second try.
1497 */
1498 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
1499 ret_data_len = sizeof(struct smb_snapshot_array);
1500
1501 /*
1502 * We return struct SRV_SNAPSHOT_ARRAY, followed by
1503 * the snapshot array (of 50 byte GMT tokens) each
1504 * representing an available previous version of the data
1505 */
1506 if (ret_data_len > (snapshot_in.snapshot_array_size +
1507 sizeof(struct smb_snapshot_array)))
1508 ret_data_len = snapshot_in.snapshot_array_size +
1509 sizeof(struct smb_snapshot_array);
1510
1511 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1512 rc = -EFAULT;
1513 }
1514
1515 kfree(retbuf);
1516 return rc;
1517 }
1518
1519 static int
1520 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1521 const char *path, struct cifs_sb_info *cifs_sb,
1522 struct cifs_fid *fid, __u16 search_flags,
1523 struct cifs_search_info *srch_inf)
1524 {
1525 __le16 *utf16_path;
1526 int rc;
1527 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1528 struct cifs_open_parms oparms;
1529
1530 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1531 if (!utf16_path)
1532 return -ENOMEM;
1533
1534 oparms.tcon = tcon;
1535 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1536 oparms.disposition = FILE_OPEN;
1537 if (backup_cred(cifs_sb))
1538 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1539 else
1540 oparms.create_options = 0;
1541 oparms.fid = fid;
1542 oparms.reconnect = false;
1543
1544 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1545 kfree(utf16_path);
1546 if (rc) {
1547 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1548 return rc;
1549 }
1550
1551 srch_inf->entries_in_buffer = 0;
1552 srch_inf->index_of_last_entry = 2;
1553
1554 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1555 fid->volatile_fid, 0, srch_inf);
1556 if (rc) {
1557 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1558 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1559 }
1560 return rc;
1561 }
1562
1563 static int
1564 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1565 struct cifs_fid *fid, __u16 search_flags,
1566 struct cifs_search_info *srch_inf)
1567 {
1568 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1569 fid->volatile_fid, 0, srch_inf);
1570 }
1571
1572 static int
1573 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1574 struct cifs_fid *fid)
1575 {
1576 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1577 }
1578
1579 /*
1580 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1581 * the number of credits and return true. Otherwise - return false.
1582 */
1583 static bool
1584 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1585 {
1586 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1587
1588 if (shdr->Status != STATUS_PENDING)
1589 return false;
1590
1591 if (!length) {
1592 spin_lock(&server->req_lock);
1593 server->credits += le16_to_cpu(shdr->CreditRequest);
1594 spin_unlock(&server->req_lock);
1595 wake_up(&server->request_q);
1596 }
1597
1598 return true;
1599 }
1600
1601 static bool
1602 smb2_is_session_expired(char *buf)
1603 {
1604 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
1605
1606 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1607 shdr->Status != STATUS_USER_SESSION_DELETED)
1608 return false;
1609
1610 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
1611 le16_to_cpu(shdr->Command),
1612 le64_to_cpu(shdr->MessageId));
1613 cifs_dbg(FYI, "Session expired or deleted\n");
1614
1615 return true;
1616 }
1617
1618 static int
1619 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1620 struct cifsInodeInfo *cinode)
1621 {
1622 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1623 return SMB2_lease_break(0, tcon, cinode->lease_key,
1624 smb2_get_lease_state(cinode));
1625
1626 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1627 fid->volatile_fid,
1628 CIFS_CACHE_READ(cinode) ? 1 : 0);
1629 }
1630
1631 static void
1632 smb2_set_related(struct smb_rqst *rqst)
1633 {
1634 struct smb2_sync_hdr *shdr;
1635
1636 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1637 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1638 }
1639
1640 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
1641
1642 static void
1643 smb2_set_next_command(struct TCP_Server_Info *server, struct smb_rqst *rqst)
1644 {
1645 struct smb2_sync_hdr *shdr;
1646 unsigned long len = smb_rqst_len(server, rqst);
1647
1648 /* SMB headers in a compound are 8 byte aligned. */
1649 if (len & 7) {
1650 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
1651 rqst->rq_iov[rqst->rq_nvec].iov_len = 8 - (len & 7);
1652 rqst->rq_nvec++;
1653 len = smb_rqst_len(server, rqst);
1654 }
1655
1656 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1657 shdr->NextCommand = cpu_to_le32(len);
1658 }
1659
1660 static int
1661 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1662 struct kstatfs *buf)
1663 {
1664 struct smb2_query_info_rsp *rsp;
1665 struct smb2_fs_full_size_info *info = NULL;
1666 struct smb_rqst rqst[3];
1667 int resp_buftype[3];
1668 struct kvec rsp_iov[3];
1669 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1670 struct kvec qi_iov[1];
1671 struct kvec close_iov[1];
1672 struct cifs_ses *ses = tcon->ses;
1673 struct TCP_Server_Info *server = ses->server;
1674 __le16 srch_path = 0; /* Null - open root of share */
1675 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1676 struct cifs_open_parms oparms;
1677 struct cifs_fid fid;
1678 int flags = 0;
1679 int rc;
1680
1681 if (smb3_encryption_required(tcon))
1682 flags |= CIFS_TRANSFORM_REQ;
1683
1684 memset(rqst, 0, sizeof(rqst));
1685 memset(resp_buftype, 0, sizeof(resp_buftype));
1686 memset(rsp_iov, 0, sizeof(rsp_iov));
1687
1688 memset(&open_iov, 0, sizeof(open_iov));
1689 rqst[0].rq_iov = open_iov;
1690 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1691
1692 oparms.tcon = tcon;
1693 oparms.desired_access = FILE_READ_ATTRIBUTES;
1694 oparms.disposition = FILE_OPEN;
1695 oparms.create_options = 0;
1696 oparms.fid = &fid;
1697 oparms.reconnect = false;
1698
1699 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &srch_path);
1700 if (rc)
1701 goto qfs_exit;
1702 smb2_set_next_command(server, &rqst[0]);
1703
1704 memset(&qi_iov, 0, sizeof(qi_iov));
1705 rqst[1].rq_iov = qi_iov;
1706 rqst[1].rq_nvec = 1;
1707
1708 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1709 FS_FULL_SIZE_INFORMATION,
1710 SMB2_O_INFO_FILESYSTEM, 0,
1711 sizeof(struct smb2_fs_full_size_info));
1712 if (rc)
1713 goto qfs_exit;
1714 smb2_set_next_command(server, &rqst[1]);
1715 smb2_set_related(&rqst[1]);
1716
1717 memset(&close_iov, 0, sizeof(close_iov));
1718 rqst[2].rq_iov = close_iov;
1719 rqst[2].rq_nvec = 1;
1720
1721 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1722 if (rc)
1723 goto qfs_exit;
1724 smb2_set_related(&rqst[2]);
1725
1726 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1727 resp_buftype, rsp_iov);
1728 if (rc)
1729 goto qfs_exit;
1730
1731 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1732 buf->f_type = SMB2_MAGIC_NUMBER;
1733 info = (struct smb2_fs_full_size_info *)(
1734 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1735 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1736 le32_to_cpu(rsp->OutputBufferLength),
1737 &rsp_iov[1],
1738 sizeof(struct smb2_fs_full_size_info));
1739 if (!rc)
1740 smb2_copy_fs_info_to_kstatfs(info, buf);
1741
1742 qfs_exit:
1743 SMB2_open_free(&rqst[0]);
1744 SMB2_query_info_free(&rqst[1]);
1745 SMB2_close_free(&rqst[2]);
1746 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1747 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1748 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1749 return rc;
1750 }
1751
1752 static int
1753 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1754 struct kstatfs *buf)
1755 {
1756 int rc;
1757 __le16 srch_path = 0; /* Null - open root of share */
1758 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1759 struct cifs_open_parms oparms;
1760 struct cifs_fid fid;
1761
1762 if (!tcon->posix_extensions)
1763 return smb2_queryfs(xid, tcon, buf);
1764
1765 oparms.tcon = tcon;
1766 oparms.desired_access = FILE_READ_ATTRIBUTES;
1767 oparms.disposition = FILE_OPEN;
1768 oparms.create_options = 0;
1769 oparms.fid = &fid;
1770 oparms.reconnect = false;
1771
1772 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
1773 if (rc)
1774 return rc;
1775
1776 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
1777 fid.volatile_fid, buf);
1778 buf->f_type = SMB2_MAGIC_NUMBER;
1779 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1780 return rc;
1781 }
1782
1783 static bool
1784 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1785 {
1786 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1787 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1788 }
1789
1790 static int
1791 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1792 __u64 length, __u32 type, int lock, int unlock, bool wait)
1793 {
1794 if (unlock && !lock)
1795 type = SMB2_LOCKFLAG_UNLOCK;
1796 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1797 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1798 current->tgid, length, offset, type, wait);
1799 }
1800
1801 static void
1802 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1803 {
1804 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1805 }
1806
1807 static void
1808 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1809 {
1810 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1811 }
1812
1813 static void
1814 smb2_new_lease_key(struct cifs_fid *fid)
1815 {
1816 generate_random_uuid(fid->lease_key);
1817 }
1818
1819 static int
1820 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1821 const char *search_name,
1822 struct dfs_info3_param **target_nodes,
1823 unsigned int *num_of_nodes,
1824 const struct nls_table *nls_codepage, int remap)
1825 {
1826 int rc;
1827 __le16 *utf16_path = NULL;
1828 int utf16_path_len = 0;
1829 struct cifs_tcon *tcon;
1830 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1831 struct get_dfs_referral_rsp *dfs_rsp = NULL;
1832 u32 dfs_req_size = 0, dfs_rsp_size = 0;
1833
1834 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1835
1836 /*
1837 * Try to use the IPC tcon, otherwise just use any
1838 */
1839 tcon = ses->tcon_ipc;
1840 if (tcon == NULL) {
1841 spin_lock(&cifs_tcp_ses_lock);
1842 tcon = list_first_entry_or_null(&ses->tcon_list,
1843 struct cifs_tcon,
1844 tcon_list);
1845 if (tcon)
1846 tcon->tc_count++;
1847 spin_unlock(&cifs_tcp_ses_lock);
1848 }
1849
1850 if (tcon == NULL) {
1851 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1852 ses);
1853 rc = -ENOTCONN;
1854 goto out;
1855 }
1856
1857 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1858 &utf16_path_len,
1859 nls_codepage, remap);
1860 if (!utf16_path) {
1861 rc = -ENOMEM;
1862 goto out;
1863 }
1864
1865 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1866 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1867 if (!dfs_req) {
1868 rc = -ENOMEM;
1869 goto out;
1870 }
1871
1872 /* Highest DFS referral version understood */
1873 dfs_req->MaxReferralLevel = DFS_VERSION;
1874
1875 /* Path to resolve in an UTF-16 null-terminated string */
1876 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1877
1878 do {
1879 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1880 FSCTL_DFS_GET_REFERRALS,
1881 true /* is_fsctl */,
1882 (char *)dfs_req, dfs_req_size,
1883 (char **)&dfs_rsp, &dfs_rsp_size);
1884 } while (rc == -EAGAIN);
1885
1886 if (rc) {
1887 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
1888 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1889 goto out;
1890 }
1891
1892 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1893 num_of_nodes, target_nodes,
1894 nls_codepage, remap, search_name,
1895 true /* is_unicode */);
1896 if (rc) {
1897 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1898 goto out;
1899 }
1900
1901 out:
1902 if (tcon && !tcon->ipc) {
1903 /* ipc tcons are not refcounted */
1904 spin_lock(&cifs_tcp_ses_lock);
1905 tcon->tc_count--;
1906 spin_unlock(&cifs_tcp_ses_lock);
1907 }
1908 kfree(utf16_path);
1909 kfree(dfs_req);
1910 kfree(dfs_rsp);
1911 return rc;
1912 }
1913 #define SMB2_SYMLINK_STRUCT_SIZE \
1914 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1915
1916 static int
1917 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1918 const char *full_path, char **target_path,
1919 struct cifs_sb_info *cifs_sb)
1920 {
1921 int rc;
1922 __le16 *utf16_path;
1923 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1924 struct cifs_open_parms oparms;
1925 struct cifs_fid fid;
1926 struct kvec err_iov = {NULL, 0};
1927 struct smb2_err_rsp *err_buf = NULL;
1928 int resp_buftype;
1929 struct smb2_symlink_err_rsp *symlink;
1930 unsigned int sub_len;
1931 unsigned int sub_offset;
1932 unsigned int print_len;
1933 unsigned int print_offset;
1934
1935 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1936
1937 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1938 if (!utf16_path)
1939 return -ENOMEM;
1940
1941 oparms.tcon = tcon;
1942 oparms.desired_access = FILE_READ_ATTRIBUTES;
1943 oparms.disposition = FILE_OPEN;
1944 if (backup_cred(cifs_sb))
1945 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1946 else
1947 oparms.create_options = 0;
1948 oparms.fid = &fid;
1949 oparms.reconnect = false;
1950
1951 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
1952 &resp_buftype);
1953 if (!rc)
1954 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1955 if (!rc || !err_iov.iov_base) {
1956 rc = -ENOENT;
1957 goto free_path;
1958 }
1959
1960 err_buf = err_iov.iov_base;
1961 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1962 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
1963 rc = -ENOENT;
1964 goto querty_exit;
1965 }
1966
1967 /* open must fail on symlink - reset rc */
1968 rc = 0;
1969 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1970 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1971 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1972 print_len = le16_to_cpu(symlink->PrintNameLength);
1973 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1974
1975 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1976 rc = -ENOENT;
1977 goto querty_exit;
1978 }
1979
1980 if (err_iov.iov_len <
1981 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1982 rc = -ENOENT;
1983 goto querty_exit;
1984 }
1985
1986 *target_path = cifs_strndup_from_utf16(
1987 (char *)symlink->PathBuffer + sub_offset,
1988 sub_len, true, cifs_sb->local_nls);
1989 if (!(*target_path)) {
1990 rc = -ENOMEM;
1991 goto querty_exit;
1992 }
1993 convert_delimiter(*target_path, '/');
1994 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1995
1996 querty_exit:
1997 free_rsp_buf(resp_buftype, err_buf);
1998 free_path:
1999 kfree(utf16_path);
2000 return rc;
2001 }
2002
2003 #ifdef CONFIG_CIFS_ACL
2004 static struct cifs_ntsd *
2005 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2006 const struct cifs_fid *cifsfid, u32 *pacllen)
2007 {
2008 struct cifs_ntsd *pntsd = NULL;
2009 unsigned int xid;
2010 int rc = -EOPNOTSUPP;
2011 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2012
2013 if (IS_ERR(tlink))
2014 return ERR_CAST(tlink);
2015
2016 xid = get_xid();
2017 cifs_dbg(FYI, "trying to get acl\n");
2018
2019 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2020 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2021 free_xid(xid);
2022
2023 cifs_put_tlink(tlink);
2024
2025 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2026 if (rc)
2027 return ERR_PTR(rc);
2028 return pntsd;
2029
2030 }
2031
2032 static struct cifs_ntsd *
2033 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2034 const char *path, u32 *pacllen)
2035 {
2036 struct cifs_ntsd *pntsd = NULL;
2037 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2038 unsigned int xid;
2039 int rc;
2040 struct cifs_tcon *tcon;
2041 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2042 struct cifs_fid fid;
2043 struct cifs_open_parms oparms;
2044 __le16 *utf16_path;
2045
2046 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2047 if (IS_ERR(tlink))
2048 return ERR_CAST(tlink);
2049
2050 tcon = tlink_tcon(tlink);
2051 xid = get_xid();
2052
2053 if (backup_cred(cifs_sb))
2054 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2055 else
2056 oparms.create_options = 0;
2057
2058 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2059 if (!utf16_path) {
2060 rc = -ENOMEM;
2061 free_xid(xid);
2062 return ERR_PTR(rc);
2063 }
2064
2065 oparms.tcon = tcon;
2066 oparms.desired_access = READ_CONTROL;
2067 oparms.disposition = FILE_OPEN;
2068 oparms.fid = &fid;
2069 oparms.reconnect = false;
2070
2071 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2072 kfree(utf16_path);
2073 if (!rc) {
2074 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2075 fid.volatile_fid, (void **)&pntsd, pacllen);
2076 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2077 }
2078
2079 cifs_put_tlink(tlink);
2080 free_xid(xid);
2081
2082 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2083 if (rc)
2084 return ERR_PTR(rc);
2085 return pntsd;
2086 }
2087
2088 #ifdef CONFIG_CIFS_ACL
2089 static int
2090 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2091 struct inode *inode, const char *path, int aclflag)
2092 {
2093 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2094 unsigned int xid;
2095 int rc, access_flags = 0;
2096 struct cifs_tcon *tcon;
2097 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2098 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2099 struct cifs_fid fid;
2100 struct cifs_open_parms oparms;
2101 __le16 *utf16_path;
2102
2103 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2104 if (IS_ERR(tlink))
2105 return PTR_ERR(tlink);
2106
2107 tcon = tlink_tcon(tlink);
2108 xid = get_xid();
2109
2110 if (backup_cred(cifs_sb))
2111 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2112 else
2113 oparms.create_options = 0;
2114
2115 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2116 access_flags = WRITE_OWNER;
2117 else
2118 access_flags = WRITE_DAC;
2119
2120 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2121 if (!utf16_path) {
2122 rc = -ENOMEM;
2123 free_xid(xid);
2124 return rc;
2125 }
2126
2127 oparms.tcon = tcon;
2128 oparms.desired_access = access_flags;
2129 oparms.disposition = FILE_OPEN;
2130 oparms.path = path;
2131 oparms.fid = &fid;
2132 oparms.reconnect = false;
2133
2134 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2135 kfree(utf16_path);
2136 if (!rc) {
2137 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2138 fid.volatile_fid, pnntsd, acllen, aclflag);
2139 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2140 }
2141
2142 cifs_put_tlink(tlink);
2143 free_xid(xid);
2144 return rc;
2145 }
2146 #endif /* CIFS_ACL */
2147
2148 /* Retrieve an ACL from the server */
2149 static struct cifs_ntsd *
2150 get_smb2_acl(struct cifs_sb_info *cifs_sb,
2151 struct inode *inode, const char *path,
2152 u32 *pacllen)
2153 {
2154 struct cifs_ntsd *pntsd = NULL;
2155 struct cifsFileInfo *open_file = NULL;
2156
2157 if (inode)
2158 open_file = find_readable_file(CIFS_I(inode), true);
2159 if (!open_file)
2160 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
2161
2162 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
2163 cifsFileInfo_put(open_file);
2164 return pntsd;
2165 }
2166 #endif
2167
2168 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
2169 loff_t offset, loff_t len, bool keep_size)
2170 {
2171 struct inode *inode;
2172 struct cifsInodeInfo *cifsi;
2173 struct cifsFileInfo *cfile = file->private_data;
2174 struct file_zero_data_information fsctl_buf;
2175 long rc;
2176 unsigned int xid;
2177
2178 xid = get_xid();
2179
2180 inode = d_inode(cfile->dentry);
2181 cifsi = CIFS_I(inode);
2182
2183 /*
2184 * We zero the range through ioctl, so we need remove the page caches
2185 * first, otherwise the data may be inconsistent with the server.
2186 */
2187 truncate_pagecache_range(inode, offset, offset + len - 1);
2188
2189 /* if file not oplocked can't be sure whether asking to extend size */
2190 if (!CIFS_CACHE_READ(cifsi))
2191 if (keep_size == false) {
2192 rc = -EOPNOTSUPP;
2193 free_xid(xid);
2194 return rc;
2195 }
2196
2197 /*
2198 * Must check if file sparse since fallocate -z (zero range) assumes
2199 * non-sparse allocation
2200 */
2201 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
2202 rc = -EOPNOTSUPP;
2203 free_xid(xid);
2204 return rc;
2205 }
2206
2207 /*
2208 * need to make sure we are not asked to extend the file since the SMB3
2209 * fsctl does not change the file size. In the future we could change
2210 * this to zero the first part of the range then set the file size
2211 * which for a non sparse file would zero the newly extended range
2212 */
2213 if (keep_size == false)
2214 if (i_size_read(inode) < offset + len) {
2215 rc = -EOPNOTSUPP;
2216 free_xid(xid);
2217 return rc;
2218 }
2219
2220 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2221
2222 fsctl_buf.FileOffset = cpu_to_le64(offset);
2223 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2224
2225 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2226 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2227 true /* is_fctl */, (char *)&fsctl_buf,
2228 sizeof(struct file_zero_data_information), NULL, NULL);
2229 free_xid(xid);
2230 return rc;
2231 }
2232
2233 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2234 loff_t offset, loff_t len)
2235 {
2236 struct inode *inode;
2237 struct cifsInodeInfo *cifsi;
2238 struct cifsFileInfo *cfile = file->private_data;
2239 struct file_zero_data_information fsctl_buf;
2240 long rc;
2241 unsigned int xid;
2242 __u8 set_sparse = 1;
2243
2244 xid = get_xid();
2245
2246 inode = d_inode(cfile->dentry);
2247 cifsi = CIFS_I(inode);
2248
2249 /* Need to make file sparse, if not already, before freeing range. */
2250 /* Consider adding equivalent for compressed since it could also work */
2251 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2252 rc = -EOPNOTSUPP;
2253 free_xid(xid);
2254 return rc;
2255 }
2256
2257 /*
2258 * We implement the punch hole through ioctl, so we need remove the page
2259 * caches first, otherwise the data may be inconsistent with the server.
2260 */
2261 truncate_pagecache_range(inode, offset, offset + len - 1);
2262
2263 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2264
2265 fsctl_buf.FileOffset = cpu_to_le64(offset);
2266 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2267
2268 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2269 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2270 true /* is_fctl */, (char *)&fsctl_buf,
2271 sizeof(struct file_zero_data_information), NULL, NULL);
2272 free_xid(xid);
2273 return rc;
2274 }
2275
2276 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2277 loff_t off, loff_t len, bool keep_size)
2278 {
2279 struct inode *inode;
2280 struct cifsInodeInfo *cifsi;
2281 struct cifsFileInfo *cfile = file->private_data;
2282 long rc = -EOPNOTSUPP;
2283 unsigned int xid;
2284
2285 xid = get_xid();
2286
2287 inode = d_inode(cfile->dentry);
2288 cifsi = CIFS_I(inode);
2289
2290 /* if file not oplocked can't be sure whether asking to extend size */
2291 if (!CIFS_CACHE_READ(cifsi))
2292 if (keep_size == false) {
2293 free_xid(xid);
2294 return rc;
2295 }
2296
2297 /*
2298 * Files are non-sparse by default so falloc may be a no-op
2299 * Must check if file sparse. If not sparse, and not extending
2300 * then no need to do anything since file already allocated
2301 */
2302 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2303 if (keep_size == true)
2304 rc = 0;
2305 /* check if extending file */
2306 else if (i_size_read(inode) >= off + len)
2307 /* not extending file and already not sparse */
2308 rc = 0;
2309 /* BB: in future add else clause to extend file */
2310 else
2311 rc = -EOPNOTSUPP;
2312 free_xid(xid);
2313 return rc;
2314 }
2315
2316 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2317 /*
2318 * Check if falloc starts within first few pages of file
2319 * and ends within a few pages of the end of file to
2320 * ensure that most of file is being forced to be
2321 * fallocated now. If so then setting whole file sparse
2322 * ie potentially making a few extra pages at the beginning
2323 * or end of the file non-sparse via set_sparse is harmless.
2324 */
2325 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2326 rc = -EOPNOTSUPP;
2327 free_xid(xid);
2328 return rc;
2329 }
2330
2331 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2332 }
2333 /* BB: else ... in future add code to extend file and set sparse */
2334
2335
2336 free_xid(xid);
2337 return rc;
2338 }
2339
2340
2341 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2342 loff_t off, loff_t len)
2343 {
2344 /* KEEP_SIZE already checked for by do_fallocate */
2345 if (mode & FALLOC_FL_PUNCH_HOLE)
2346 return smb3_punch_hole(file, tcon, off, len);
2347 else if (mode & FALLOC_FL_ZERO_RANGE) {
2348 if (mode & FALLOC_FL_KEEP_SIZE)
2349 return smb3_zero_range(file, tcon, off, len, true);
2350 return smb3_zero_range(file, tcon, off, len, false);
2351 } else if (mode == FALLOC_FL_KEEP_SIZE)
2352 return smb3_simple_falloc(file, tcon, off, len, true);
2353 else if (mode == 0)
2354 return smb3_simple_falloc(file, tcon, off, len, false);
2355
2356 return -EOPNOTSUPP;
2357 }
2358
2359 static void
2360 smb2_downgrade_oplock(struct TCP_Server_Info *server,
2361 struct cifsInodeInfo *cinode, bool set_level2)
2362 {
2363 if (set_level2)
2364 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2365 0, NULL);
2366 else
2367 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2368 }
2369
2370 static void
2371 smb21_downgrade_oplock(struct TCP_Server_Info *server,
2372 struct cifsInodeInfo *cinode, bool set_level2)
2373 {
2374 server->ops->set_oplock_level(cinode,
2375 set_level2 ? SMB2_LEASE_READ_CACHING_HE :
2376 0, 0, NULL);
2377 }
2378
2379 static void
2380 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2381 unsigned int epoch, bool *purge_cache)
2382 {
2383 oplock &= 0xFF;
2384 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2385 return;
2386 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
2387 cinode->oplock = CIFS_CACHE_RHW_FLG;
2388 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2389 &cinode->vfs_inode);
2390 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
2391 cinode->oplock = CIFS_CACHE_RW_FLG;
2392 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2393 &cinode->vfs_inode);
2394 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2395 cinode->oplock = CIFS_CACHE_READ_FLG;
2396 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2397 &cinode->vfs_inode);
2398 } else
2399 cinode->oplock = 0;
2400 }
2401
2402 static void
2403 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2404 unsigned int epoch, bool *purge_cache)
2405 {
2406 char message[5] = {0};
2407 unsigned int new_oplock = 0;
2408
2409 oplock &= 0xFF;
2410 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2411 return;
2412
2413 /* Check if the server granted an oplock rather than a lease */
2414 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2415 return smb2_set_oplock_level(cinode, oplock, epoch,
2416 purge_cache);
2417
2418 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2419 new_oplock |= CIFS_CACHE_READ_FLG;
2420 strcat(message, "R");
2421 }
2422 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2423 new_oplock |= CIFS_CACHE_HANDLE_FLG;
2424 strcat(message, "H");
2425 }
2426 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2427 new_oplock |= CIFS_CACHE_WRITE_FLG;
2428 strcat(message, "W");
2429 }
2430 if (!new_oplock)
2431 strncpy(message, "None", sizeof(message));
2432
2433 cinode->oplock = new_oplock;
2434 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2435 &cinode->vfs_inode);
2436 }
2437
2438 static void
2439 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2440 unsigned int epoch, bool *purge_cache)
2441 {
2442 unsigned int old_oplock = cinode->oplock;
2443
2444 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2445
2446 if (purge_cache) {
2447 *purge_cache = false;
2448 if (old_oplock == CIFS_CACHE_READ_FLG) {
2449 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2450 (epoch - cinode->epoch > 0))
2451 *purge_cache = true;
2452 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2453 (epoch - cinode->epoch > 1))
2454 *purge_cache = true;
2455 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2456 (epoch - cinode->epoch > 1))
2457 *purge_cache = true;
2458 else if (cinode->oplock == 0 &&
2459 (epoch - cinode->epoch > 0))
2460 *purge_cache = true;
2461 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2462 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2463 (epoch - cinode->epoch > 0))
2464 *purge_cache = true;
2465 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2466 (epoch - cinode->epoch > 1))
2467 *purge_cache = true;
2468 }
2469 cinode->epoch = epoch;
2470 }
2471 }
2472
2473 static bool
2474 smb2_is_read_op(__u32 oplock)
2475 {
2476 return oplock == SMB2_OPLOCK_LEVEL_II;
2477 }
2478
2479 static bool
2480 smb21_is_read_op(__u32 oplock)
2481 {
2482 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2483 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2484 }
2485
2486 static __le32
2487 map_oplock_to_lease(u8 oplock)
2488 {
2489 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2490 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2491 else if (oplock == SMB2_OPLOCK_LEVEL_II)
2492 return SMB2_LEASE_READ_CACHING;
2493 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2494 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2495 SMB2_LEASE_WRITE_CACHING;
2496 return 0;
2497 }
2498
2499 static char *
2500 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2501 {
2502 struct create_lease *buf;
2503
2504 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2505 if (!buf)
2506 return NULL;
2507
2508 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2509 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2510
2511 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2512 (struct create_lease, lcontext));
2513 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2514 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2515 (struct create_lease, Name));
2516 buf->ccontext.NameLength = cpu_to_le16(4);
2517 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2518 buf->Name[0] = 'R';
2519 buf->Name[1] = 'q';
2520 buf->Name[2] = 'L';
2521 buf->Name[3] = 's';
2522 return (char *)buf;
2523 }
2524
2525 static char *
2526 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2527 {
2528 struct create_lease_v2 *buf;
2529
2530 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2531 if (!buf)
2532 return NULL;
2533
2534 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
2535 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2536
2537 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2538 (struct create_lease_v2, lcontext));
2539 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2540 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2541 (struct create_lease_v2, Name));
2542 buf->ccontext.NameLength = cpu_to_le16(4);
2543 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2544 buf->Name[0] = 'R';
2545 buf->Name[1] = 'q';
2546 buf->Name[2] = 'L';
2547 buf->Name[3] = 's';
2548 return (char *)buf;
2549 }
2550
2551 static __u8
2552 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2553 {
2554 struct create_lease *lc = (struct create_lease *)buf;
2555
2556 *epoch = 0; /* not used */
2557 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2558 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2559 return le32_to_cpu(lc->lcontext.LeaseState);
2560 }
2561
2562 static __u8
2563 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
2564 {
2565 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2566
2567 *epoch = le16_to_cpu(lc->lcontext.Epoch);
2568 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2569 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2570 if (lease_key)
2571 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
2572 return le32_to_cpu(lc->lcontext.LeaseState);
2573 }
2574
2575 static unsigned int
2576 smb2_wp_retry_size(struct inode *inode)
2577 {
2578 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2579 SMB2_MAX_BUFFER_SIZE);
2580 }
2581
2582 static bool
2583 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2584 {
2585 return !cfile->invalidHandle;
2586 }
2587
2588 static void
2589 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2590 struct smb_rqst *old_rq)
2591 {
2592 struct smb2_sync_hdr *shdr =
2593 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
2594
2595 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2596 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2597 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2598 tr_hdr->Flags = cpu_to_le16(0x01);
2599 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2600 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2601 }
2602
2603 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2604 * stack object as buf.
2605 */
2606 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2607 unsigned int buflen)
2608 {
2609 void *addr;
2610 /*
2611 * VMAP_STACK (at least) puts stack into the vmalloc address space
2612 */
2613 if (is_vmalloc_addr(buf))
2614 addr = vmalloc_to_page(buf);
2615 else
2616 addr = virt_to_page(buf);
2617 sg_set_page(sg, addr, buflen, offset_in_page(buf));
2618 }
2619
2620 /* Assumes the first rqst has a transform header as the first iov.
2621 * I.e.
2622 * rqst[0].rq_iov[0] is transform header
2623 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
2624 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
2625 */
2626 static struct scatterlist *
2627 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
2628 {
2629 unsigned int sg_len;
2630 struct scatterlist *sg;
2631 unsigned int i;
2632 unsigned int j;
2633 unsigned int idx = 0;
2634 int skip;
2635
2636 sg_len = 1;
2637 for (i = 0; i < num_rqst; i++)
2638 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
2639
2640 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2641 if (!sg)
2642 return NULL;
2643
2644 sg_init_table(sg, sg_len);
2645 for (i = 0; i < num_rqst; i++) {
2646 for (j = 0; j < rqst[i].rq_nvec; j++) {
2647 /*
2648 * The first rqst has a transform header where the
2649 * first 20 bytes are not part of the encrypted blob
2650 */
2651 skip = (i == 0) && (j == 0) ? 20 : 0;
2652 smb2_sg_set_buf(&sg[idx++],
2653 rqst[i].rq_iov[j].iov_base + skip,
2654 rqst[i].rq_iov[j].iov_len - skip);
2655 }
2656
2657 for (j = 0; j < rqst[i].rq_npages; j++) {
2658 unsigned int len, offset;
2659
2660 rqst_page_get_length(&rqst[i], j, &len, &offset);
2661 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
2662 }
2663 }
2664 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
2665 return sg;
2666 }
2667
2668 static int
2669 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2670 {
2671 struct cifs_ses *ses;
2672 u8 *ses_enc_key;
2673
2674 spin_lock(&cifs_tcp_ses_lock);
2675 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2676 if (ses->Suid != ses_id)
2677 continue;
2678 ses_enc_key = enc ? ses->smb3encryptionkey :
2679 ses->smb3decryptionkey;
2680 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2681 spin_unlock(&cifs_tcp_ses_lock);
2682 return 0;
2683 }
2684 spin_unlock(&cifs_tcp_ses_lock);
2685
2686 return 1;
2687 }
2688 /*
2689 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2690 * iov[0] - transform header (associate data),
2691 * iov[1-N] - SMB2 header and pages - data to encrypt.
2692 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2693 * untouched.
2694 */
2695 static int
2696 crypt_message(struct TCP_Server_Info *server, int num_rqst,
2697 struct smb_rqst *rqst, int enc)
2698 {
2699 struct smb2_transform_hdr *tr_hdr =
2700 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
2701 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
2702 int rc = 0;
2703 struct scatterlist *sg;
2704 u8 sign[SMB2_SIGNATURE_SIZE] = {};
2705 u8 key[SMB3_SIGN_KEY_SIZE];
2706 struct aead_request *req;
2707 char *iv;
2708 unsigned int iv_len;
2709 DECLARE_CRYPTO_WAIT(wait);
2710 struct crypto_aead *tfm;
2711 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2712
2713 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2714 if (rc) {
2715 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2716 enc ? "en" : "de");
2717 return 0;
2718 }
2719
2720 rc = smb3_crypto_aead_allocate(server);
2721 if (rc) {
2722 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2723 return rc;
2724 }
2725
2726 tfm = enc ? server->secmech.ccmaesencrypt :
2727 server->secmech.ccmaesdecrypt;
2728 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2729 if (rc) {
2730 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2731 return rc;
2732 }
2733
2734 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2735 if (rc) {
2736 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2737 return rc;
2738 }
2739
2740 req = aead_request_alloc(tfm, GFP_KERNEL);
2741 if (!req) {
2742 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2743 return -ENOMEM;
2744 }
2745
2746 if (!enc) {
2747 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2748 crypt_len += SMB2_SIGNATURE_SIZE;
2749 }
2750
2751 sg = init_sg(num_rqst, rqst, sign);
2752 if (!sg) {
2753 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2754 rc = -ENOMEM;
2755 goto free_req;
2756 }
2757
2758 iv_len = crypto_aead_ivsize(tfm);
2759 iv = kzalloc(iv_len, GFP_KERNEL);
2760 if (!iv) {
2761 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2762 rc = -ENOMEM;
2763 goto free_sg;
2764 }
2765 iv[0] = 3;
2766 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2767
2768 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2769 aead_request_set_ad(req, assoc_data_len);
2770
2771 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2772 crypto_req_done, &wait);
2773
2774 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2775 : crypto_aead_decrypt(req), &wait);
2776
2777 if (!rc && enc)
2778 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2779
2780 kfree(iv);
2781 free_sg:
2782 kfree(sg);
2783 free_req:
2784 kfree(req);
2785 return rc;
2786 }
2787
2788 void
2789 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
2790 {
2791 int i, j;
2792
2793 for (i = 0; i < num_rqst; i++) {
2794 if (rqst[i].rq_pages) {
2795 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
2796 put_page(rqst[i].rq_pages[j]);
2797 kfree(rqst[i].rq_pages);
2798 }
2799 }
2800 }
2801
2802 /*
2803 * This function will initialize new_rq and encrypt the content.
2804 * The first entry, new_rq[0], only contains a single iov which contains
2805 * a smb2_transform_hdr and is pre-allocated by the caller.
2806 * This function then populates new_rq[1+] with the content from olq_rq[0+].
2807 *
2808 * The end result is an array of smb_rqst structures where the first structure
2809 * only contains a single iov for the transform header which we then can pass
2810 * to crypt_message().
2811 *
2812 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
2813 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
2814 */
2815 static int
2816 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
2817 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
2818 {
2819 struct page **pages;
2820 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
2821 unsigned int npages;
2822 unsigned int orig_len = 0;
2823 int i, j;
2824 int rc = -ENOMEM;
2825
2826 for (i = 1; i < num_rqst; i++) {
2827 npages = old_rq[i - 1].rq_npages;
2828 pages = kmalloc_array(npages, sizeof(struct page *),
2829 GFP_KERNEL);
2830 if (!pages)
2831 goto err_free;
2832
2833 new_rq[i].rq_pages = pages;
2834 new_rq[i].rq_npages = npages;
2835 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
2836 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
2837 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
2838 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
2839 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
2840
2841 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
2842
2843 for (j = 0; j < npages; j++) {
2844 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2845 if (!pages[j])
2846 goto err_free;
2847 }
2848
2849 /* copy pages form the old */
2850 for (j = 0; j < npages; j++) {
2851 char *dst, *src;
2852 unsigned int offset, len;
2853
2854 rqst_page_get_length(&new_rq[i], j, &len, &offset);
2855
2856 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
2857 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
2858
2859 memcpy(dst, src, len);
2860 kunmap(new_rq[i].rq_pages[j]);
2861 kunmap(old_rq[i - 1].rq_pages[j]);
2862 }
2863 }
2864
2865 /* fill the 1st iov with a transform header */
2866 fill_transform_hdr(tr_hdr, orig_len, old_rq);
2867
2868 rc = crypt_message(server, num_rqst, new_rq, 1);
2869 cifs_dbg(FYI, "encrypt message returned %d", rc);
2870 if (rc)
2871 goto err_free;
2872
2873 return rc;
2874
2875 err_free:
2876 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
2877 return rc;
2878 }
2879
2880 static int
2881 smb3_is_transform_hdr(void *buf)
2882 {
2883 struct smb2_transform_hdr *trhdr = buf;
2884
2885 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2886 }
2887
2888 static int
2889 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2890 unsigned int buf_data_size, struct page **pages,
2891 unsigned int npages, unsigned int page_data_size)
2892 {
2893 struct kvec iov[2];
2894 struct smb_rqst rqst = {NULL};
2895 int rc;
2896
2897 iov[0].iov_base = buf;
2898 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2899 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2900 iov[1].iov_len = buf_data_size;
2901
2902 rqst.rq_iov = iov;
2903 rqst.rq_nvec = 2;
2904 rqst.rq_pages = pages;
2905 rqst.rq_npages = npages;
2906 rqst.rq_pagesz = PAGE_SIZE;
2907 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2908
2909 rc = crypt_message(server, 1, &rqst, 0);
2910 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2911
2912 if (rc)
2913 return rc;
2914
2915 memmove(buf, iov[1].iov_base, buf_data_size);
2916
2917 server->total_read = buf_data_size + page_data_size;
2918
2919 return rc;
2920 }
2921
2922 static int
2923 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2924 unsigned int npages, unsigned int len)
2925 {
2926 int i;
2927 int length;
2928
2929 for (i = 0; i < npages; i++) {
2930 struct page *page = pages[i];
2931 size_t n;
2932
2933 n = len;
2934 if (len >= PAGE_SIZE) {
2935 /* enough data to fill the page */
2936 n = PAGE_SIZE;
2937 len -= n;
2938 } else {
2939 zero_user(page, len, PAGE_SIZE - len);
2940 len = 0;
2941 }
2942 length = cifs_read_page_from_socket(server, page, 0, n);
2943 if (length < 0)
2944 return length;
2945 server->total_read += length;
2946 }
2947
2948 return 0;
2949 }
2950
2951 static int
2952 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2953 unsigned int cur_off, struct bio_vec **page_vec)
2954 {
2955 struct bio_vec *bvec;
2956 int i;
2957
2958 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2959 if (!bvec)
2960 return -ENOMEM;
2961
2962 for (i = 0; i < npages; i++) {
2963 bvec[i].bv_page = pages[i];
2964 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2965 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2966 data_size -= bvec[i].bv_len;
2967 }
2968
2969 if (data_size != 0) {
2970 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2971 kfree(bvec);
2972 return -EIO;
2973 }
2974
2975 *page_vec = bvec;
2976 return 0;
2977 }
2978
2979 static int
2980 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2981 char *buf, unsigned int buf_len, struct page **pages,
2982 unsigned int npages, unsigned int page_data_size)
2983 {
2984 unsigned int data_offset;
2985 unsigned int data_len;
2986 unsigned int cur_off;
2987 unsigned int cur_page_idx;
2988 unsigned int pad_len;
2989 struct cifs_readdata *rdata = mid->callback_data;
2990 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2991 struct bio_vec *bvec = NULL;
2992 struct iov_iter iter;
2993 struct kvec iov;
2994 int length;
2995 bool use_rdma_mr = false;
2996
2997 if (shdr->Command != SMB2_READ) {
2998 cifs_dbg(VFS, "only big read responses are supported\n");
2999 return -ENOTSUPP;
3000 }
3001
3002 if (server->ops->is_session_expired &&
3003 server->ops->is_session_expired(buf)) {
3004 cifs_reconnect(server);
3005 wake_up(&server->response_q);
3006 return -1;
3007 }
3008
3009 if (server->ops->is_status_pending &&
3010 server->ops->is_status_pending(buf, server, 0))
3011 return -1;
3012
3013 /* set up first two iov to get credits */
3014 rdata->iov[0].iov_base = buf;
3015 rdata->iov[0].iov_len = 0;
3016 rdata->iov[1].iov_base = buf;
3017 rdata->iov[1].iov_len =
3018 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
3019 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
3020 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
3021 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
3022 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
3023
3024 rdata->result = server->ops->map_error(buf, true);
3025 if (rdata->result != 0) {
3026 cifs_dbg(FYI, "%s: server returned error %d\n",
3027 __func__, rdata->result);
3028 /* normal error on read response */
3029 dequeue_mid(mid, false);
3030 return 0;
3031 }
3032
3033 data_offset = server->ops->read_data_offset(buf);
3034 #ifdef CONFIG_CIFS_SMB_DIRECT
3035 use_rdma_mr = rdata->mr;
3036 #endif
3037 data_len = server->ops->read_data_length(buf, use_rdma_mr);
3038
3039 if (data_offset < server->vals->read_rsp_size) {
3040 /*
3041 * win2k8 sometimes sends an offset of 0 when the read
3042 * is beyond the EOF. Treat it as if the data starts just after
3043 * the header.
3044 */
3045 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
3046 __func__, data_offset);
3047 data_offset = server->vals->read_rsp_size;
3048 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
3049 /* data_offset is beyond the end of smallbuf */
3050 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
3051 __func__, data_offset);
3052 rdata->result = -EIO;
3053 dequeue_mid(mid, rdata->result);
3054 return 0;
3055 }
3056
3057 pad_len = data_offset - server->vals->read_rsp_size;
3058
3059 if (buf_len <= data_offset) {
3060 /* read response payload is in pages */
3061 cur_page_idx = pad_len / PAGE_SIZE;
3062 cur_off = pad_len % PAGE_SIZE;
3063
3064 if (cur_page_idx != 0) {
3065 /* data offset is beyond the 1st page of response */
3066 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
3067 __func__, data_offset);
3068 rdata->result = -EIO;
3069 dequeue_mid(mid, rdata->result);
3070 return 0;
3071 }
3072
3073 if (data_len > page_data_size - pad_len) {
3074 /* data_len is corrupt -- discard frame */
3075 rdata->result = -EIO;
3076 dequeue_mid(mid, rdata->result);
3077 return 0;
3078 }
3079
3080 rdata->result = init_read_bvec(pages, npages, page_data_size,
3081 cur_off, &bvec);
3082 if (rdata->result != 0) {
3083 dequeue_mid(mid, rdata->result);
3084 return 0;
3085 }
3086
3087 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
3088 } else if (buf_len >= data_offset + data_len) {
3089 /* read response payload is in buf */
3090 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
3091 iov.iov_base = buf + data_offset;
3092 iov.iov_len = data_len;
3093 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
3094 } else {
3095 /* read response payload cannot be in both buf and pages */
3096 WARN_ONCE(1, "buf can not contain only a part of read data");
3097 rdata->result = -EIO;
3098 dequeue_mid(mid, rdata->result);
3099 return 0;
3100 }
3101
3102 length = rdata->copy_into_pages(server, rdata, &iter);
3103
3104 kfree(bvec);
3105
3106 if (length < 0)
3107 return length;
3108
3109 dequeue_mid(mid, false);
3110 return length;
3111 }
3112
3113 static int
3114 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
3115 {
3116 char *buf = server->smallbuf;
3117 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3118 unsigned int npages;
3119 struct page **pages;
3120 unsigned int len;
3121 unsigned int buflen = server->pdu_size;
3122 int rc;
3123 int i = 0;
3124
3125 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
3126 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
3127
3128 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
3129 if (rc < 0)
3130 return rc;
3131 server->total_read += rc;
3132
3133 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
3134 server->vals->read_rsp_size;
3135 npages = DIV_ROUND_UP(len, PAGE_SIZE);
3136
3137 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
3138 if (!pages) {
3139 rc = -ENOMEM;
3140 goto discard_data;
3141 }
3142
3143 for (; i < npages; i++) {
3144 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3145 if (!pages[i]) {
3146 rc = -ENOMEM;
3147 goto discard_data;
3148 }
3149 }
3150
3151 /* read read data into pages */
3152 rc = read_data_into_pages(server, pages, npages, len);
3153 if (rc)
3154 goto free_pages;
3155
3156 rc = cifs_discard_remaining_data(server);
3157 if (rc)
3158 goto free_pages;
3159
3160 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
3161 pages, npages, len);
3162 if (rc)
3163 goto free_pages;
3164
3165 *mid = smb2_find_mid(server, buf);
3166 if (*mid == NULL)
3167 cifs_dbg(FYI, "mid not found\n");
3168 else {
3169 cifs_dbg(FYI, "mid found\n");
3170 (*mid)->decrypted = true;
3171 rc = handle_read_data(server, *mid, buf,
3172 server->vals->read_rsp_size,
3173 pages, npages, len);
3174 }
3175
3176 free_pages:
3177 for (i = i - 1; i >= 0; i--)
3178 put_page(pages[i]);
3179 kfree(pages);
3180 return rc;
3181 discard_data:
3182 cifs_discard_remaining_data(server);
3183 goto free_pages;
3184 }
3185
3186 static int
3187 receive_encrypted_standard(struct TCP_Server_Info *server,
3188 struct mid_q_entry **mids, char **bufs,
3189 int *num_mids)
3190 {
3191 int ret, length;
3192 char *buf = server->smallbuf;
3193 struct smb2_sync_hdr *shdr;
3194 unsigned int pdu_length = server->pdu_size;
3195 unsigned int buf_size;
3196 struct mid_q_entry *mid_entry;
3197 int next_is_large;
3198 char *next_buffer = NULL;
3199
3200 *num_mids = 0;
3201
3202 /* switch to large buffer if too big for a small one */
3203 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
3204 server->large_buf = true;
3205 memcpy(server->bigbuf, buf, server->total_read);
3206 buf = server->bigbuf;
3207 }
3208
3209 /* now read the rest */
3210 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
3211 pdu_length - HEADER_SIZE(server) + 1);
3212 if (length < 0)
3213 return length;
3214 server->total_read += length;
3215
3216 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
3217 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
3218 if (length)
3219 return length;
3220
3221 next_is_large = server->large_buf;
3222 one_more:
3223 shdr = (struct smb2_sync_hdr *)buf;
3224 if (shdr->NextCommand) {
3225 if (next_is_large)
3226 next_buffer = (char *)cifs_buf_get();
3227 else
3228 next_buffer = (char *)cifs_small_buf_get();
3229 memcpy(next_buffer,
3230 buf + le32_to_cpu(shdr->NextCommand),
3231 pdu_length - le32_to_cpu(shdr->NextCommand));
3232 }
3233
3234 mid_entry = smb2_find_mid(server, buf);
3235 if (mid_entry == NULL)
3236 cifs_dbg(FYI, "mid not found\n");
3237 else {
3238 cifs_dbg(FYI, "mid found\n");
3239 mid_entry->decrypted = true;
3240 mid_entry->resp_buf_size = server->pdu_size;
3241 }
3242
3243 if (*num_mids >= MAX_COMPOUND) {
3244 cifs_dbg(VFS, "too many PDUs in compound\n");
3245 return -1;
3246 }
3247 bufs[*num_mids] = buf;
3248 mids[(*num_mids)++] = mid_entry;
3249
3250 if (mid_entry && mid_entry->handle)
3251 ret = mid_entry->handle(server, mid_entry);
3252 else
3253 ret = cifs_handle_standard(server, mid_entry);
3254
3255 if (ret == 0 && shdr->NextCommand) {
3256 pdu_length -= le32_to_cpu(shdr->NextCommand);
3257 server->large_buf = next_is_large;
3258 if (next_is_large)
3259 server->bigbuf = buf = next_buffer;
3260 else
3261 server->smallbuf = buf = next_buffer;
3262 goto one_more;
3263 } else if (ret != 0) {
3264 /*
3265 * ret != 0 here means that we didn't get to handle_mid() thus
3266 * server->smallbuf and server->bigbuf are still valid. We need
3267 * to free next_buffer because it is not going to be used
3268 * anywhere.
3269 */
3270 if (next_is_large)
3271 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
3272 else
3273 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
3274 }
3275
3276 return ret;
3277 }
3278
3279 static int
3280 smb3_receive_transform(struct TCP_Server_Info *server,
3281 struct mid_q_entry **mids, char **bufs, int *num_mids)
3282 {
3283 char *buf = server->smallbuf;
3284 unsigned int pdu_length = server->pdu_size;
3285 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3286 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3287
3288 if (pdu_length < sizeof(struct smb2_transform_hdr) +
3289 sizeof(struct smb2_sync_hdr)) {
3290 cifs_dbg(VFS, "Transform message is too small (%u)\n",
3291 pdu_length);
3292 cifs_reconnect(server);
3293 wake_up(&server->response_q);
3294 return -ECONNABORTED;
3295 }
3296
3297 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
3298 cifs_dbg(VFS, "Transform message is broken\n");
3299 cifs_reconnect(server);
3300 wake_up(&server->response_q);
3301 return -ECONNABORTED;
3302 }
3303
3304 /* TODO: add support for compounds containing READ. */
3305 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
3306 *num_mids = 1;
3307 return receive_encrypted_read(server, &mids[0]);
3308 }
3309
3310 return receive_encrypted_standard(server, mids, bufs, num_mids);
3311 }
3312
3313 int
3314 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
3315 {
3316 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
3317
3318 return handle_read_data(server, mid, buf, server->pdu_size,
3319 NULL, 0, 0);
3320 }
3321
3322 static int
3323 smb2_next_header(char *buf)
3324 {
3325 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
3326 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
3327
3328 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
3329 return sizeof(struct smb2_transform_hdr) +
3330 le32_to_cpu(t_hdr->OriginalMessageSize);
3331
3332 return le32_to_cpu(hdr->NextCommand);
3333 }
3334
3335 struct smb_version_operations smb20_operations = {
3336 .compare_fids = smb2_compare_fids,
3337 .setup_request = smb2_setup_request,
3338 .setup_async_request = smb2_setup_async_request,
3339 .check_receive = smb2_check_receive,
3340 .add_credits = smb2_add_credits,
3341 .set_credits = smb2_set_credits,
3342 .get_credits_field = smb2_get_credits_field,
3343 .get_credits = smb2_get_credits,
3344 .wait_mtu_credits = cifs_wait_mtu_credits,
3345 .get_next_mid = smb2_get_next_mid,
3346 .revert_current_mid = smb2_revert_current_mid,
3347 .read_data_offset = smb2_read_data_offset,
3348 .read_data_length = smb2_read_data_length,
3349 .map_error = map_smb2_to_linux_error,
3350 .find_mid = smb2_find_mid,
3351 .check_message = smb2_check_message,
3352 .dump_detail = smb2_dump_detail,
3353 .clear_stats = smb2_clear_stats,
3354 .print_stats = smb2_print_stats,
3355 .is_oplock_break = smb2_is_valid_oplock_break,
3356 .handle_cancelled_mid = smb2_handle_cancelled_mid,
3357 .downgrade_oplock = smb2_downgrade_oplock,
3358 .need_neg = smb2_need_neg,
3359 .negotiate = smb2_negotiate,
3360 .negotiate_wsize = smb2_negotiate_wsize,
3361 .negotiate_rsize = smb2_negotiate_rsize,
3362 .sess_setup = SMB2_sess_setup,
3363 .logoff = SMB2_logoff,
3364 .tree_connect = SMB2_tcon,
3365 .tree_disconnect = SMB2_tdis,
3366 .qfs_tcon = smb2_qfs_tcon,
3367 .is_path_accessible = smb2_is_path_accessible,
3368 .can_echo = smb2_can_echo,
3369 .echo = SMB2_echo,
3370 .query_path_info = smb2_query_path_info,
3371 .get_srv_inum = smb2_get_srv_inum,
3372 .query_file_info = smb2_query_file_info,
3373 .set_path_size = smb2_set_path_size,
3374 .set_file_size = smb2_set_file_size,
3375 .set_file_info = smb2_set_file_info,
3376 .set_compression = smb2_set_compression,
3377 .mkdir = smb2_mkdir,
3378 .mkdir_setinfo = smb2_mkdir_setinfo,
3379 .rmdir = smb2_rmdir,
3380 .unlink = smb2_unlink,
3381 .rename = smb2_rename_path,
3382 .create_hardlink = smb2_create_hardlink,
3383 .query_symlink = smb2_query_symlink,
3384 .query_mf_symlink = smb3_query_mf_symlink,
3385 .create_mf_symlink = smb3_create_mf_symlink,
3386 .open = smb2_open_file,
3387 .set_fid = smb2_set_fid,
3388 .close = smb2_close_file,
3389 .flush = smb2_flush_file,
3390 .async_readv = smb2_async_readv,
3391 .async_writev = smb2_async_writev,
3392 .sync_read = smb2_sync_read,
3393 .sync_write = smb2_sync_write,
3394 .query_dir_first = smb2_query_dir_first,
3395 .query_dir_next = smb2_query_dir_next,
3396 .close_dir = smb2_close_dir,
3397 .calc_smb_size = smb2_calc_size,
3398 .is_status_pending = smb2_is_status_pending,
3399 .is_session_expired = smb2_is_session_expired,
3400 .oplock_response = smb2_oplock_response,
3401 .queryfs = smb2_queryfs,
3402 .mand_lock = smb2_mand_lock,
3403 .mand_unlock_range = smb2_unlock_range,
3404 .push_mand_locks = smb2_push_mandatory_locks,
3405 .get_lease_key = smb2_get_lease_key,
3406 .set_lease_key = smb2_set_lease_key,
3407 .new_lease_key = smb2_new_lease_key,
3408 .calc_signature = smb2_calc_signature,
3409 .is_read_op = smb2_is_read_op,
3410 .set_oplock_level = smb2_set_oplock_level,
3411 .create_lease_buf = smb2_create_lease_buf,
3412 .parse_lease_buf = smb2_parse_lease_buf,
3413 .copychunk_range = smb2_copychunk_range,
3414 .wp_retry_size = smb2_wp_retry_size,
3415 .dir_needs_close = smb2_dir_needs_close,
3416 .get_dfs_refer = smb2_get_dfs_refer,
3417 .select_sectype = smb2_select_sectype,
3418 #ifdef CONFIG_CIFS_XATTR
3419 .query_all_EAs = smb2_query_eas,
3420 .set_EA = smb2_set_ea,
3421 #endif /* CIFS_XATTR */
3422 #ifdef CONFIG_CIFS_ACL
3423 .get_acl = get_smb2_acl,
3424 .get_acl_by_fid = get_smb2_acl_by_fid,
3425 .set_acl = set_smb2_acl,
3426 #endif /* CIFS_ACL */
3427 .next_header = smb2_next_header,
3428 };
3429
3430 struct smb_version_operations smb21_operations = {
3431 .compare_fids = smb2_compare_fids,
3432 .setup_request = smb2_setup_request,
3433 .setup_async_request = smb2_setup_async_request,
3434 .check_receive = smb2_check_receive,
3435 .add_credits = smb2_add_credits,
3436 .set_credits = smb2_set_credits,
3437 .get_credits_field = smb2_get_credits_field,
3438 .get_credits = smb2_get_credits,
3439 .wait_mtu_credits = smb2_wait_mtu_credits,
3440 .get_next_mid = smb2_get_next_mid,
3441 .revert_current_mid = smb2_revert_current_mid,
3442 .read_data_offset = smb2_read_data_offset,
3443 .read_data_length = smb2_read_data_length,
3444 .map_error = map_smb2_to_linux_error,
3445 .find_mid = smb2_find_mid,
3446 .check_message = smb2_check_message,
3447 .dump_detail = smb2_dump_detail,
3448 .clear_stats = smb2_clear_stats,
3449 .print_stats = smb2_print_stats,
3450 .is_oplock_break = smb2_is_valid_oplock_break,
3451 .handle_cancelled_mid = smb2_handle_cancelled_mid,
3452 .downgrade_oplock = smb21_downgrade_oplock,
3453 .need_neg = smb2_need_neg,
3454 .negotiate = smb2_negotiate,
3455 .negotiate_wsize = smb2_negotiate_wsize,
3456 .negotiate_rsize = smb2_negotiate_rsize,
3457 .sess_setup = SMB2_sess_setup,
3458 .logoff = SMB2_logoff,
3459 .tree_connect = SMB2_tcon,
3460 .tree_disconnect = SMB2_tdis,
3461 .qfs_tcon = smb2_qfs_tcon,
3462 .is_path_accessible = smb2_is_path_accessible,
3463 .can_echo = smb2_can_echo,
3464 .echo = SMB2_echo,
3465 .query_path_info = smb2_query_path_info,
3466 .get_srv_inum = smb2_get_srv_inum,
3467 .query_file_info = smb2_query_file_info,
3468 .set_path_size = smb2_set_path_size,
3469 .set_file_size = smb2_set_file_size,
3470 .set_file_info = smb2_set_file_info,
3471 .set_compression = smb2_set_compression,
3472 .mkdir = smb2_mkdir,
3473 .mkdir_setinfo = smb2_mkdir_setinfo,
3474 .rmdir = smb2_rmdir,
3475 .unlink = smb2_unlink,
3476 .rename = smb2_rename_path,
3477 .create_hardlink = smb2_create_hardlink,
3478 .query_symlink = smb2_query_symlink,
3479 .query_mf_symlink = smb3_query_mf_symlink,
3480 .create_mf_symlink = smb3_create_mf_symlink,
3481 .open = smb2_open_file,
3482 .set_fid = smb2_set_fid,
3483 .close = smb2_close_file,
3484 .flush = smb2_flush_file,
3485 .async_readv = smb2_async_readv,
3486 .async_writev = smb2_async_writev,
3487 .sync_read = smb2_sync_read,
3488 .sync_write = smb2_sync_write,
3489 .query_dir_first = smb2_query_dir_first,
3490 .query_dir_next = smb2_query_dir_next,
3491 .close_dir = smb2_close_dir,
3492 .calc_smb_size = smb2_calc_size,
3493 .is_status_pending = smb2_is_status_pending,
3494 .is_session_expired = smb2_is_session_expired,
3495 .oplock_response = smb2_oplock_response,
3496 .queryfs = smb2_queryfs,
3497 .mand_lock = smb2_mand_lock,
3498 .mand_unlock_range = smb2_unlock_range,
3499 .push_mand_locks = smb2_push_mandatory_locks,
3500 .get_lease_key = smb2_get_lease_key,
3501 .set_lease_key = smb2_set_lease_key,
3502 .new_lease_key = smb2_new_lease_key,
3503 .calc_signature = smb2_calc_signature,
3504 .is_read_op = smb21_is_read_op,
3505 .set_oplock_level = smb21_set_oplock_level,
3506 .create_lease_buf = smb2_create_lease_buf,
3507 .parse_lease_buf = smb2_parse_lease_buf,
3508 .copychunk_range = smb2_copychunk_range,
3509 .wp_retry_size = smb2_wp_retry_size,
3510 .dir_needs_close = smb2_dir_needs_close,
3511 .enum_snapshots = smb3_enum_snapshots,
3512 .get_dfs_refer = smb2_get_dfs_refer,
3513 .select_sectype = smb2_select_sectype,
3514 #ifdef CONFIG_CIFS_XATTR
3515 .query_all_EAs = smb2_query_eas,
3516 .set_EA = smb2_set_ea,
3517 #endif /* CIFS_XATTR */
3518 #ifdef CONFIG_CIFS_ACL
3519 .get_acl = get_smb2_acl,
3520 .get_acl_by_fid = get_smb2_acl_by_fid,
3521 .set_acl = set_smb2_acl,
3522 #endif /* CIFS_ACL */
3523 .next_header = smb2_next_header,
3524 };
3525
3526 struct smb_version_operations smb30_operations = {
3527 .compare_fids = smb2_compare_fids,
3528 .setup_request = smb2_setup_request,
3529 .setup_async_request = smb2_setup_async_request,
3530 .check_receive = smb2_check_receive,
3531 .add_credits = smb2_add_credits,
3532 .set_credits = smb2_set_credits,
3533 .get_credits_field = smb2_get_credits_field,
3534 .get_credits = smb2_get_credits,
3535 .wait_mtu_credits = smb2_wait_mtu_credits,
3536 .get_next_mid = smb2_get_next_mid,
3537 .revert_current_mid = smb2_revert_current_mid,
3538 .read_data_offset = smb2_read_data_offset,
3539 .read_data_length = smb2_read_data_length,
3540 .map_error = map_smb2_to_linux_error,
3541 .find_mid = smb2_find_mid,
3542 .check_message = smb2_check_message,
3543 .dump_detail = smb2_dump_detail,
3544 .clear_stats = smb2_clear_stats,
3545 .print_stats = smb2_print_stats,
3546 .dump_share_caps = smb2_dump_share_caps,
3547 .is_oplock_break = smb2_is_valid_oplock_break,
3548 .handle_cancelled_mid = smb2_handle_cancelled_mid,
3549 .downgrade_oplock = smb21_downgrade_oplock,
3550 .need_neg = smb2_need_neg,
3551 .negotiate = smb2_negotiate,
3552 .negotiate_wsize = smb2_negotiate_wsize,
3553 .negotiate_rsize = smb2_negotiate_rsize,
3554 .sess_setup = SMB2_sess_setup,
3555 .logoff = SMB2_logoff,
3556 .tree_connect = SMB2_tcon,
3557 .tree_disconnect = SMB2_tdis,
3558 .qfs_tcon = smb3_qfs_tcon,
3559 .is_path_accessible = smb2_is_path_accessible,
3560 .can_echo = smb2_can_echo,
3561 .echo = SMB2_echo,
3562 .query_path_info = smb2_query_path_info,
3563 .get_srv_inum = smb2_get_srv_inum,
3564 .query_file_info = smb2_query_file_info,
3565 .set_path_size = smb2_set_path_size,
3566 .set_file_size = smb2_set_file_size,
3567 .set_file_info = smb2_set_file_info,
3568 .set_compression = smb2_set_compression,
3569 .mkdir = smb2_mkdir,
3570 .mkdir_setinfo = smb2_mkdir_setinfo,
3571 .rmdir = smb2_rmdir,
3572 .unlink = smb2_unlink,
3573 .rename = smb2_rename_path,
3574 .create_hardlink = smb2_create_hardlink,
3575 .query_symlink = smb2_query_symlink,
3576 .query_mf_symlink = smb3_query_mf_symlink,
3577 .create_mf_symlink = smb3_create_mf_symlink,
3578 .open = smb2_open_file,
3579 .set_fid = smb2_set_fid,
3580 .close = smb2_close_file,
3581 .flush = smb2_flush_file,
3582 .async_readv = smb2_async_readv,
3583 .async_writev = smb2_async_writev,
3584 .sync_read = smb2_sync_read,
3585 .sync_write = smb2_sync_write,
3586 .query_dir_first = smb2_query_dir_first,
3587 .query_dir_next = smb2_query_dir_next,
3588 .close_dir = smb2_close_dir,
3589 .calc_smb_size = smb2_calc_size,
3590 .is_status_pending = smb2_is_status_pending,
3591 .is_session_expired = smb2_is_session_expired,
3592 .oplock_response = smb2_oplock_response,
3593 .queryfs = smb2_queryfs,
3594 .mand_lock = smb2_mand_lock,
3595 .mand_unlock_range = smb2_unlock_range,
3596 .push_mand_locks = smb2_push_mandatory_locks,
3597 .get_lease_key = smb2_get_lease_key,
3598 .set_lease_key = smb2_set_lease_key,
3599 .new_lease_key = smb2_new_lease_key,
3600 .generate_signingkey = generate_smb30signingkey,
3601 .calc_signature = smb3_calc_signature,
3602 .set_integrity = smb3_set_integrity,
3603 .is_read_op = smb21_is_read_op,
3604 .set_oplock_level = smb3_set_oplock_level,
3605 .create_lease_buf = smb3_create_lease_buf,
3606 .parse_lease_buf = smb3_parse_lease_buf,
3607 .copychunk_range = smb2_copychunk_range,
3608 .duplicate_extents = smb2_duplicate_extents,
3609 .validate_negotiate = smb3_validate_negotiate,
3610 .wp_retry_size = smb2_wp_retry_size,
3611 .dir_needs_close = smb2_dir_needs_close,
3612 .fallocate = smb3_fallocate,
3613 .enum_snapshots = smb3_enum_snapshots,
3614 .init_transform_rq = smb3_init_transform_rq,
3615 .is_transform_hdr = smb3_is_transform_hdr,
3616 .receive_transform = smb3_receive_transform,
3617 .get_dfs_refer = smb2_get_dfs_refer,
3618 .select_sectype = smb2_select_sectype,
3619 #ifdef CONFIG_CIFS_XATTR
3620 .query_all_EAs = smb2_query_eas,
3621 .set_EA = smb2_set_ea,
3622 #endif /* CIFS_XATTR */
3623 #ifdef CONFIG_CIFS_ACL
3624 .get_acl = get_smb2_acl,
3625 .get_acl_by_fid = get_smb2_acl_by_fid,
3626 .set_acl = set_smb2_acl,
3627 #endif /* CIFS_ACL */
3628 .next_header = smb2_next_header,
3629 };
3630
3631 struct smb_version_operations smb311_operations = {
3632 .compare_fids = smb2_compare_fids,
3633 .setup_request = smb2_setup_request,
3634 .setup_async_request = smb2_setup_async_request,
3635 .check_receive = smb2_check_receive,
3636 .add_credits = smb2_add_credits,
3637 .set_credits = smb2_set_credits,
3638 .get_credits_field = smb2_get_credits_field,
3639 .get_credits = smb2_get_credits,
3640 .wait_mtu_credits = smb2_wait_mtu_credits,
3641 .get_next_mid = smb2_get_next_mid,
3642 .revert_current_mid = smb2_revert_current_mid,
3643 .read_data_offset = smb2_read_data_offset,
3644 .read_data_length = smb2_read_data_length,
3645 .map_error = map_smb2_to_linux_error,
3646 .find_mid = smb2_find_mid,
3647 .check_message = smb2_check_message,
3648 .dump_detail = smb2_dump_detail,
3649 .clear_stats = smb2_clear_stats,
3650 .print_stats = smb2_print_stats,
3651 .dump_share_caps = smb2_dump_share_caps,
3652 .is_oplock_break = smb2_is_valid_oplock_break,
3653 .handle_cancelled_mid = smb2_handle_cancelled_mid,
3654 .downgrade_oplock = smb21_downgrade_oplock,
3655 .need_neg = smb2_need_neg,
3656 .negotiate = smb2_negotiate,
3657 .negotiate_wsize = smb2_negotiate_wsize,
3658 .negotiate_rsize = smb2_negotiate_rsize,
3659 .sess_setup = SMB2_sess_setup,
3660 .logoff = SMB2_logoff,
3661 .tree_connect = SMB2_tcon,
3662 .tree_disconnect = SMB2_tdis,
3663 .qfs_tcon = smb3_qfs_tcon,
3664 .is_path_accessible = smb2_is_path_accessible,
3665 .can_echo = smb2_can_echo,
3666 .echo = SMB2_echo,
3667 .query_path_info = smb2_query_path_info,
3668 .get_srv_inum = smb2_get_srv_inum,
3669 .query_file_info = smb2_query_file_info,
3670 .set_path_size = smb2_set_path_size,
3671 .set_file_size = smb2_set_file_size,
3672 .set_file_info = smb2_set_file_info,
3673 .set_compression = smb2_set_compression,
3674 .mkdir = smb2_mkdir,
3675 .mkdir_setinfo = smb2_mkdir_setinfo,
3676 .posix_mkdir = smb311_posix_mkdir,
3677 .rmdir = smb2_rmdir,
3678 .unlink = smb2_unlink,
3679 .rename = smb2_rename_path,
3680 .create_hardlink = smb2_create_hardlink,
3681 .query_symlink = smb2_query_symlink,
3682 .query_mf_symlink = smb3_query_mf_symlink,
3683 .create_mf_symlink = smb3_create_mf_symlink,
3684 .open = smb2_open_file,
3685 .set_fid = smb2_set_fid,
3686 .close = smb2_close_file,
3687 .flush = smb2_flush_file,
3688 .async_readv = smb2_async_readv,
3689 .async_writev = smb2_async_writev,
3690 .sync_read = smb2_sync_read,
3691 .sync_write = smb2_sync_write,
3692 .query_dir_first = smb2_query_dir_first,
3693 .query_dir_next = smb2_query_dir_next,
3694 .close_dir = smb2_close_dir,
3695 .calc_smb_size = smb2_calc_size,
3696 .is_status_pending = smb2_is_status_pending,
3697 .is_session_expired = smb2_is_session_expired,
3698 .oplock_response = smb2_oplock_response,
3699 .queryfs = smb311_queryfs,
3700 .mand_lock = smb2_mand_lock,
3701 .mand_unlock_range = smb2_unlock_range,
3702 .push_mand_locks = smb2_push_mandatory_locks,
3703 .get_lease_key = smb2_get_lease_key,
3704 .set_lease_key = smb2_set_lease_key,
3705 .new_lease_key = smb2_new_lease_key,
3706 .generate_signingkey = generate_smb311signingkey,
3707 .calc_signature = smb3_calc_signature,
3708 .set_integrity = smb3_set_integrity,
3709 .is_read_op = smb21_is_read_op,
3710 .set_oplock_level = smb3_set_oplock_level,
3711 .create_lease_buf = smb3_create_lease_buf,
3712 .parse_lease_buf = smb3_parse_lease_buf,
3713 .copychunk_range = smb2_copychunk_range,
3714 .duplicate_extents = smb2_duplicate_extents,
3715 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3716 .wp_retry_size = smb2_wp_retry_size,
3717 .dir_needs_close = smb2_dir_needs_close,
3718 .fallocate = smb3_fallocate,
3719 .enum_snapshots = smb3_enum_snapshots,
3720 .init_transform_rq = smb3_init_transform_rq,
3721 .is_transform_hdr = smb3_is_transform_hdr,
3722 .receive_transform = smb3_receive_transform,
3723 .get_dfs_refer = smb2_get_dfs_refer,
3724 .select_sectype = smb2_select_sectype,
3725 #ifdef CONFIG_CIFS_XATTR
3726 .query_all_EAs = smb2_query_eas,
3727 .set_EA = smb2_set_ea,
3728 #endif /* CIFS_XATTR */
3729 #ifdef CONFIG_CIFS_ACL
3730 .get_acl = get_smb2_acl,
3731 .get_acl_by_fid = get_smb2_acl_by_fid,
3732 .set_acl = set_smb2_acl,
3733 #endif /* CIFS_ACL */
3734 .next_header = smb2_next_header,
3735 };
3736
3737 struct smb_version_values smb20_values = {
3738 .version_string = SMB20_VERSION_STRING,
3739 .protocol_id = SMB20_PROT_ID,
3740 .req_capabilities = 0, /* MBZ */
3741 .large_lock_type = 0,
3742 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3743 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3744 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3745 .header_size = sizeof(struct smb2_sync_hdr),
3746 .header_preamble_size = 0,
3747 .max_header_size = MAX_SMB2_HDR_SIZE,
3748 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3749 .lock_cmd = SMB2_LOCK,
3750 .cap_unix = 0,
3751 .cap_nt_find = SMB2_NT_FIND,
3752 .cap_large_files = SMB2_LARGE_FILES,
3753 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3754 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3755 .create_lease_size = sizeof(struct create_lease),
3756 };
3757
3758 struct smb_version_values smb21_values = {
3759 .version_string = SMB21_VERSION_STRING,
3760 .protocol_id = SMB21_PROT_ID,
3761 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3762 .large_lock_type = 0,
3763 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3764 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3765 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3766 .header_size = sizeof(struct smb2_sync_hdr),
3767 .header_preamble_size = 0,
3768 .max_header_size = MAX_SMB2_HDR_SIZE,
3769 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3770 .lock_cmd = SMB2_LOCK,
3771 .cap_unix = 0,
3772 .cap_nt_find = SMB2_NT_FIND,
3773 .cap_large_files = SMB2_LARGE_FILES,
3774 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3775 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3776 .create_lease_size = sizeof(struct create_lease),
3777 };
3778
3779 struct smb_version_values smb3any_values = {
3780 .version_string = SMB3ANY_VERSION_STRING,
3781 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3782 .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,
3783 .large_lock_type = 0,
3784 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3785 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3786 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3787 .header_size = sizeof(struct smb2_sync_hdr),
3788 .header_preamble_size = 0,
3789 .max_header_size = MAX_SMB2_HDR_SIZE,
3790 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3791 .lock_cmd = SMB2_LOCK,
3792 .cap_unix = 0,
3793 .cap_nt_find = SMB2_NT_FIND,
3794 .cap_large_files = SMB2_LARGE_FILES,
3795 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3796 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3797 .create_lease_size = sizeof(struct create_lease_v2),
3798 };
3799
3800 struct smb_version_values smbdefault_values = {
3801 .version_string = SMBDEFAULT_VERSION_STRING,
3802 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3803 .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,
3804 .large_lock_type = 0,
3805 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3806 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3807 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3808 .header_size = sizeof(struct smb2_sync_hdr),
3809 .header_preamble_size = 0,
3810 .max_header_size = MAX_SMB2_HDR_SIZE,
3811 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3812 .lock_cmd = SMB2_LOCK,
3813 .cap_unix = 0,
3814 .cap_nt_find = SMB2_NT_FIND,
3815 .cap_large_files = SMB2_LARGE_FILES,
3816 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3817 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3818 .create_lease_size = sizeof(struct create_lease_v2),
3819 };
3820
3821 struct smb_version_values smb30_values = {
3822 .version_string = SMB30_VERSION_STRING,
3823 .protocol_id = SMB30_PROT_ID,
3824 .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,
3825 .large_lock_type = 0,
3826 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3827 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3828 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3829 .header_size = sizeof(struct smb2_sync_hdr),
3830 .header_preamble_size = 0,
3831 .max_header_size = MAX_SMB2_HDR_SIZE,
3832 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3833 .lock_cmd = SMB2_LOCK,
3834 .cap_unix = 0,
3835 .cap_nt_find = SMB2_NT_FIND,
3836 .cap_large_files = SMB2_LARGE_FILES,
3837 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3838 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3839 .create_lease_size = sizeof(struct create_lease_v2),
3840 };
3841
3842 struct smb_version_values smb302_values = {
3843 .version_string = SMB302_VERSION_STRING,
3844 .protocol_id = SMB302_PROT_ID,
3845 .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,
3846 .large_lock_type = 0,
3847 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3848 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3849 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3850 .header_size = sizeof(struct smb2_sync_hdr),
3851 .header_preamble_size = 0,
3852 .max_header_size = MAX_SMB2_HDR_SIZE,
3853 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3854 .lock_cmd = SMB2_LOCK,
3855 .cap_unix = 0,
3856 .cap_nt_find = SMB2_NT_FIND,
3857 .cap_large_files = SMB2_LARGE_FILES,
3858 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3859 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3860 .create_lease_size = sizeof(struct create_lease_v2),
3861 };
3862
3863 struct smb_version_values smb311_values = {
3864 .version_string = SMB311_VERSION_STRING,
3865 .protocol_id = SMB311_PROT_ID,
3866 .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,
3867 .large_lock_type = 0,
3868 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3869 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3870 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3871 .header_size = sizeof(struct smb2_sync_hdr),
3872 .header_preamble_size = 0,
3873 .max_header_size = MAX_SMB2_HDR_SIZE,
3874 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3875 .lock_cmd = SMB2_LOCK,
3876 .cap_unix = 0,
3877 .cap_nt_find = SMB2_NT_FIND,
3878 .cap_large_files = SMB2_LARGE_FILES,
3879 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3880 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3881 .create_lease_size = sizeof(struct create_lease_v2),
3882 };
Linux with added FPC-III support