projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'spi-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
[linux-2.6-block.git] / fs / cifs / smb2ops.c
CommitLineData
1080ef75
SF		 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
3a3bab50 20#include <linux/pagemap.h>
6fc05c25 21#include <linux/vfs.h>
f29ebb47 22#include <linux/falloc.h>
026e93dc 23#include <linux/scatterlist.h>
4fa8e504 24#include <linux/uuid.h>
026e93dc 25#include <crypto/aead.h>
1080ef75 26#include "cifsglob.h"
2dc7e1c0
PS		 27#include "smb2pdu.h"
28#include "smb2proto.h"
28ea5290
PS		 29#include "cifsproto.h"
30#include "cifs_debug.h"
b42bf888 31#include "cifs_unicode.h"
2e44b288 32#include "smb2status.h"
6fc05c25 33#include "smb2glob.h"
834170c8 34#include "cifs_ioctl.h"
09902f8d 35#include "smbdirect.h"
28ea5290 36
ef68e831 37/* Change credits for different ops and return the total number of credits */
28ea5290
PS		 38static int
39change_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:
ef68e831 45 return 0;
28ea5290
PS		 46 case 1:
47 server->echoes = false;
48 server->oplocks = false;
28ea5290
PS		 49 break;
50 case 2:
51 server->echoes = true;
52 server->oplocks = false;
53 server->echo_credits = 1;
28ea5290
PS		 54 break;
55 default:
56 server->echoes = true;
e0ddde9d
SF		 57 if (enable_oplocks) {
58 server->oplocks = true;
59 server->oplock_credits = 1;
60 } else
61 server->oplocks = false;
62
28ea5290 63 server->echo_credits = 1;
28ea5290
PS		 64 }
65 server->credits -= server->echo_credits + server->oplock_credits;
ef68e831 66 return server->credits + server->echo_credits + server->oplock_credits;
28ea5290
PS		 67}
68
69static void
70smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
71 const int optype)
72{
ef68e831
PS		 73 int *val, rc = -1;
74
28ea5290
PS		 75 spin_lock(&server->req_lock);
76 val = server->ops->get_credits_field(server, optype);
b340a4d4
SF		 77
78 /* eg found case where write overlapping reconnect messed up credits */
79 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
80 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
81 server->hostname, *val);
82
28ea5290 83 *val += add;
141891f4
SF		 84 if (*val > 65000) {
85 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
86 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
87 }
28ea5290 88 server->in_flight--;
ec2e4523 89 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
28ea5290 90 rc = change_conf(server);
983c88a4
PS		 91 /*
92 * Sometimes server returns 0 credits on oplock break ack - we need to
93 * rebalance credits in this case.
94 */
95 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
96 server->oplocks) {
97 if (server->credits > 1) {
98 server->credits--;
99 server->oplock_credits++;
100 }
101 }
28ea5290
PS		 102 spin_unlock(&server->req_lock);
103 wake_up(&server->request_q);
ef68e831
PS		 104
105 if (server->tcpStatus == CifsNeedReconnect)
106 return;
107
108 switch (rc) {
109 case -1:
110 /* change_conf hasn't been executed */
111 break;
112 case 0:
113 cifs_dbg(VFS, "Possible client or server bug - zero credits\n");
114 break;
115 case 1:
116 cifs_dbg(VFS, "disabling echoes and oplocks\n");
117 break;
118 case 2:
119 cifs_dbg(FYI, "disabling oplocks\n");
120 break;
121 default:
122 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
123 }
28ea5290
PS		 124}
125
126static void
127smb2_set_credits(struct TCP_Server_Info *server, const int val)
128{
129 spin_lock(&server->req_lock);
130 server->credits = val;
9e1a37da
SF		 131 if (val == 1)
132 server->reconnect_instance++;
28ea5290 133 spin_unlock(&server->req_lock);
6e4d3bbe
SF		 134 /* don't log while holding the lock */
135 if (val == 1)
136 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
28ea5290
PS		 137}
138
139static int *
140smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
141{
142 switch (optype) {
143 case CIFS_ECHO_OP:
144 return &server->echo_credits;
145 case CIFS_OBREAK_OP:
146 return &server->oplock_credits;
147 default:
148 return &server->credits;
149 }
150}
151
152static unsigned int
153smb2_get_credits(struct mid_q_entry *mid)
154{
49f466bd 155 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
31473fc4 156
3d3003fc
PS		 157 if (mid->mid_state == MID_RESPONSE_RECEIVED
158 || mid->mid_state == MID_RESPONSE_MALFORMED)
159 return le16_to_cpu(shdr->CreditRequest);
160
161 return 0;
28ea5290 162}
2dc7e1c0 163
cb7e9eab
PS		 164static int
165smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
166 unsigned int *num, unsigned int *credits)
167{
168 int rc = 0;
169 unsigned int scredits;
170
171 spin_lock(&server->req_lock);
172 while (1) {
173 if (server->credits <= 0) {
174 spin_unlock(&server->req_lock);
175 cifs_num_waiters_inc(server);
176 rc = wait_event_killable(server->request_q,
177 has_credits(server, &server->credits));
178 cifs_num_waiters_dec(server);
179 if (rc)
180 return rc;
181 spin_lock(&server->req_lock);
182 } else {
183 if (server->tcpStatus == CifsExiting) {
184 spin_unlock(&server->req_lock);
185 return -ENOENT;
186 }
187
188 scredits = server->credits;
189 /* can deadlock with reopen */
acc58d0b 190 if (scredits <= 8) {
cb7e9eab
PS		 191 *num = SMB2_MAX_BUFFER_SIZE;
192 *credits = 0;
193 break;
194 }
195
acc58d0b
PS		 196 /* leave some credits for reopen and other ops */
197 scredits -= 8;
cb7e9eab
PS		 198 *num = min_t(unsigned int, size,
199 scredits * SMB2_MAX_BUFFER_SIZE);
200
201 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
202 server->credits -= *credits;
203 server->in_flight++;
204 break;
205 }
206 }
207 spin_unlock(&server->req_lock);
208 return rc;
209}
210
2dc7e1c0
PS		 211static __u64
212smb2_get_next_mid(struct TCP_Server_Info *server)
213{
214 __u64 mid;
215 /* for SMB2 we need the current value */
216 spin_lock(&GlobalMid_Lock);
217 mid = server->CurrentMid++;
218 spin_unlock(&GlobalMid_Lock);
219 return mid;
220}
1080ef75 221
093b2bda
PS		 222static struct mid_q_entry *
223smb2_find_mid(struct TCP_Server_Info *server, char *buf)
224{
225 struct mid_q_entry *mid;
49f466bd 226 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
31473fc4 227 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
093b2bda 228
31473fc4 229 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
373512ec
SF		 230 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
231 return NULL;
232 }
233
093b2bda
PS		 234 spin_lock(&GlobalMid_Lock);
235 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
9235d098 236 if ((mid->mid == wire_mid) &&
093b2bda 237 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
31473fc4 238 (mid->command == shdr->Command)) {
696e420b 239 kref_get(&mid->refcount);
093b2bda
PS		 240 spin_unlock(&GlobalMid_Lock);
241 return mid;
242 }
243 }
244 spin_unlock(&GlobalMid_Lock);
245 return NULL;
246}
247
248static void
14547f7d 249smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
093b2bda
PS		 250{
251#ifdef CONFIG_CIFS_DEBUG2
49f466bd 252 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
093b2bda 253
f96637be 254 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
31473fc4
PS		 255 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
256 shdr->ProcessId);
14547f7d 257 cifs_dbg(VFS, "smb buf %p len %u\n", buf,
71992e62 258 server->ops->calc_smb_size(buf, server));
093b2bda
PS		 259#endif
260}
261
ec2e4523
PS		 262static bool
263smb2_need_neg(struct TCP_Server_Info *server)
264{
265 return server->max_read == 0;
266}
267
268static int
269smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
270{
271 int rc;
272 ses->server->CurrentMid = 0;
273 rc = SMB2_negotiate(xid, ses);
274 /* BB we probably don't need to retry with modern servers */
275 if (rc == -EAGAIN)
276 rc = -EHOSTDOWN;
277 return rc;
278}
279
3a3bab50
PS		 280static unsigned int
281smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
282{
283 struct TCP_Server_Info *server = tcon->ses->server;
284 unsigned int wsize;
285
286 /* start with specified wsize, or default */
287 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
288 wsize = min_t(unsigned int, wsize, server->max_write);
09902f8d 289#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 290 if (server->rdma) {
291 if (server->sign)
292 wsize = min_t(unsigned int,
293 wsize, server->smbd_conn->max_fragmented_send_size);
294 else
295 wsize = min_t(unsigned int,
09902f8d 296 wsize, server->smbd_conn->max_readwrite_size);
bb4c0419 297 }
09902f8d 298#endif
cb7e9eab
PS		 299 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
300 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 301
3a3bab50
PS		 302 return wsize;
303}
304
3d621230
SF		 305static unsigned int
306smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
307{
308 struct TCP_Server_Info *server = tcon->ses->server;
309 unsigned int wsize;
310
311 /* start with specified wsize, or default */
312 wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
313 wsize = min_t(unsigned int, wsize, server->max_write);
314#ifdef CONFIG_CIFS_SMB_DIRECT
315 if (server->rdma) {
316 if (server->sign)
317 wsize = min_t(unsigned int,
318 wsize, server->smbd_conn->max_fragmented_send_size);
319 else
320 wsize = min_t(unsigned int,
321 wsize, server->smbd_conn->max_readwrite_size);
322 }
323#endif
324 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
325 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
326
327 return wsize;
328}
329
3a3bab50
PS		 330static unsigned int
331smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
332{
333 struct TCP_Server_Info *server = tcon->ses->server;
334 unsigned int rsize;
335
336 /* start with specified rsize, or default */
337 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
338 rsize = min_t(unsigned int, rsize, server->max_read);
09902f8d 339#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 340 if (server->rdma) {
341 if (server->sign)
342 rsize = min_t(unsigned int,
343 rsize, server->smbd_conn->max_fragmented_recv_size);
344 else
345 rsize = min_t(unsigned int,
09902f8d 346 rsize, server->smbd_conn->max_readwrite_size);
bb4c0419 347 }
09902f8d 348#endif
bed9da02
PS		 349
350 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
351 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 352
3a3bab50
PS		 353 return rsize;
354}
355
3d621230
SF		 356static unsigned int
357smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
358{
359 struct TCP_Server_Info *server = tcon->ses->server;
360 unsigned int rsize;
361
362 /* start with specified rsize, or default */
363 rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
364 rsize = min_t(unsigned int, rsize, server->max_read);
365#ifdef CONFIG_CIFS_SMB_DIRECT
366 if (server->rdma) {
367 if (server->sign)
368 rsize = min_t(unsigned int,
369 rsize, server->smbd_conn->max_fragmented_recv_size);
370 else
371 rsize = min_t(unsigned int,
372 rsize, server->smbd_conn->max_readwrite_size);
373 }
374#endif
375
376 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
377 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
378
379 return rsize;
380}
fe856be4
AA		 381
382static int
383parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
384 size_t buf_len,
385 struct cifs_server_iface **iface_list,
386 size_t *iface_count)
387{
388 struct network_interface_info_ioctl_rsp *p;
389 struct sockaddr_in *addr4;
390 struct sockaddr_in6 *addr6;
391 struct iface_info_ipv4 *p4;
392 struct iface_info_ipv6 *p6;
393 struct cifs_server_iface *info;
394 ssize_t bytes_left;
395 size_t next = 0;
396 int nb_iface = 0;
397 int rc = 0;
398
399 *iface_list = NULL;
400 *iface_count = 0;
401
402 /*
403 * Fist pass: count and sanity check
404 */
405
406 bytes_left = buf_len;
407 p = buf;
408 while (bytes_left >= sizeof(*p)) {
409 nb_iface++;
410 next = le32_to_cpu(p->Next);
411 if (!next) {
412 bytes_left -= sizeof(*p);
413 break;
414 }
415 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
416 bytes_left -= next;
417 }
418
419 if (!nb_iface) {
420 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
421 rc = -EINVAL;
422 goto out;
423 }
424
425 if (bytes_left || p->Next)
426 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
427
428
429 /*
430 * Second pass: extract info to internal structure
431 */
432
433 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
434 if (!*iface_list) {
435 rc = -ENOMEM;
436 goto out;
437 }
438
439 info = *iface_list;
440 bytes_left = buf_len;
441 p = buf;
442 while (bytes_left >= sizeof(*p)) {
443 info->speed = le64_to_cpu(p->LinkSpeed);
444 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
445 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
446
447 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
448 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
449 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
450 le32_to_cpu(p->Capability));
451
452 switch (p->Family) {
453 /*
454 * The kernel and wire socket structures have the same
455 * layout and use network byte order but make the
456 * conversion explicit in case either one changes.
457 */
458 case INTERNETWORK:
459 addr4 = (struct sockaddr_in *)&info->sockaddr;
460 p4 = (struct iface_info_ipv4 *)p->Buffer;
461 addr4->sin_family = AF_INET;
462 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
463
464 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
465 addr4->sin_port = cpu_to_be16(CIFS_PORT);
466
467 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
468 &addr4->sin_addr);
469 break;
470 case INTERNETWORKV6:
471 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
472 p6 = (struct iface_info_ipv6 *)p->Buffer;
473 addr6->sin6_family = AF_INET6;
474 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
475
476 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
477 addr6->sin6_flowinfo = 0;
478 addr6->sin6_scope_id = 0;
479 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
480
481 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
482 &addr6->sin6_addr);
483 break;
484 default:
485 cifs_dbg(VFS,
486 "%s: skipping unsupported socket family\n",
487 __func__);
488 goto next_iface;
489 }
490
491 (*iface_count)++;
492 info++;
493next_iface:
494 next = le32_to_cpu(p->Next);
495 if (!next)
496 break;
497 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
498 bytes_left -= next;
499 }
500
501 if (!*iface_count) {
502 rc = -EINVAL;
503 goto out;
504 }
505
506out:
507 if (rc) {
508 kfree(*iface_list);
509 *iface_count = 0;
510 *iface_list = NULL;
511 }
512 return rc;
513}
514
515
c481e9fe
SF		 516static int
517SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
518{
519 int rc;
520 unsigned int ret_data_len = 0;
fe856be4
AA		 521 struct network_interface_info_ioctl_rsp *out_buf = NULL;
522 struct cifs_server_iface *iface_list;
523 size_t iface_count;
524 struct cifs_ses *ses = tcon->ses;
c481e9fe
SF		 525
526 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
527 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
528 NULL /* no data input */, 0 /* no data input */,
529 (char **)&out_buf, &ret_data_len);
c3ed4402
SF		 530 if (rc == -EOPNOTSUPP) {
531 cifs_dbg(FYI,
532 "server does not support query network interfaces\n");
533 goto out;
534 } else if (rc != 0) {
9ffc5412 535 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
fe856be4 536 goto out;
9ffc5412 537 }
fe856be4
AA		 538
539 rc = parse_server_interfaces(out_buf, ret_data_len,
540 &iface_list, &iface_count);
541 if (rc)
542 goto out;
543
544 spin_lock(&ses->iface_lock);
545 kfree(ses->iface_list);
546 ses->iface_list = iface_list;
547 ses->iface_count = iface_count;
548 ses->iface_last_update = jiffies;
549 spin_unlock(&ses->iface_lock);
550
551out:
24df1483 552 kfree(out_buf);
c481e9fe
SF		 553 return rc;
554}
c481e9fe 555
9da6ec77
RS		 556static void
557smb2_close_cached_fid(struct kref *ref)
a93864d9 558{
9da6ec77
RS		 559 struct cached_fid *cfid = container_of(ref, struct cached_fid,
560 refcount);
561
a93864d9
RS		 562 if (cfid->is_valid) {
563 cifs_dbg(FYI, "clear cached root file handle\n");
564 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
565 cfid->fid->volatile_fid);
566 cfid->is_valid = false;
567 }
9da6ec77
RS		 568}
569
570void close_shroot(struct cached_fid *cfid)
571{
572 mutex_lock(&cfid->fid_mutex);
573 kref_put(&cfid->refcount, smb2_close_cached_fid);
a93864d9
RS		 574 mutex_unlock(&cfid->fid_mutex);
575}
576
9da6ec77
RS		 577void
578smb2_cached_lease_break(struct work_struct *work)
579{
580 struct cached_fid *cfid = container_of(work,
581 struct cached_fid, lease_break);
582
583 close_shroot(cfid);
584}
585
3d4ef9a1
SF		 586/*
587 * Open the directory at the root of a share
588 */
589int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
590{
591 struct cifs_open_parms oparams;
592 int rc;
593 __le16 srch_path = 0; /* Null - since an open of top of share */
a93864d9 594 u8 oplock = SMB2_OPLOCK_LEVEL_II;
3d4ef9a1 595
a93864d9
RS		 596 mutex_lock(&tcon->crfid.fid_mutex);
597 if (tcon->crfid.is_valid) {
3d4ef9a1 598 cifs_dbg(FYI, "found a cached root file handle\n");
a93864d9 599 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
9da6ec77 600 kref_get(&tcon->crfid.refcount);
a93864d9 601 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 602 return 0;
603 }
604
605 oparams.tcon = tcon;
606 oparams.create_options = 0;
607 oparams.desired_access = FILE_READ_ATTRIBUTES;
608 oparams.disposition = FILE_OPEN;
609 oparams.fid = pfid;
610 oparams.reconnect = false;
611
9d874c36 612 rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
3d4ef9a1 613 if (rc == 0) {
a93864d9
RS		 614 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
615 tcon->crfid.tcon = tcon;
616 tcon->crfid.is_valid = true;
9da6ec77
RS		 617 kref_init(&tcon->crfid.refcount);
618 kref_get(&tcon->crfid.refcount);
3d4ef9a1 619 }
a93864d9 620 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 621 return rc;
622}
623
af6a12ea
SF		 624static void
625smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
626{
627 int rc;
628 __le16 srch_path = 0; /* Null - open root of share */
629 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
630 struct cifs_open_parms oparms;
631 struct cifs_fid fid;
3d4ef9a1 632 bool no_cached_open = tcon->nohandlecache;
af6a12ea
SF		 633
634 oparms.tcon = tcon;
635 oparms.desired_access = FILE_READ_ATTRIBUTES;
636 oparms.disposition = FILE_OPEN;
637 oparms.create_options = 0;
638 oparms.fid = &fid;
639 oparms.reconnect = false;
640
3d4ef9a1 641 if (no_cached_open)
9d874c36
RS		 642 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
643 NULL);
3d4ef9a1
SF		 644 else
645 rc = open_shroot(xid, tcon, &fid);
646
af6a12ea
SF		 647 if (rc)
648 return;
649
c481e9fe 650 SMB3_request_interfaces(xid, tcon);
c481e9fe 651
af6a12ea
SF		 652 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
653 FS_ATTRIBUTE_INFORMATION);
654 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
655 FS_DEVICE_INFORMATION);
21ba3845
SF		 656 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
657 FS_VOLUME_INFORMATION);
af6a12ea
SF		 658 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
659 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
3d4ef9a1
SF		 660 if (no_cached_open)
661 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
9da6ec77
RS		 662 else
663 close_shroot(&tcon->crfid);
664
af6a12ea
SF		 665 return;
666}
667
34f62640
SF		 668static void
669smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
670{
671 int rc;
672 __le16 srch_path = 0; /* Null - open root of share */
673 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
674 struct cifs_open_parms oparms;
675 struct cifs_fid fid;
676
677 oparms.tcon = tcon;
678 oparms.desired_access = FILE_READ_ATTRIBUTES;
679 oparms.disposition = FILE_OPEN;
680 oparms.create_options = 0;
681 oparms.fid = &fid;
682 oparms.reconnect = false;
683
9d874c36 684 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
34f62640
SF		 685 if (rc)
686 return;
687
2167114c
SF		 688 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
689 FS_ATTRIBUTE_INFORMATION);
690 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
691 FS_DEVICE_INFORMATION);
34f62640
SF		 692 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
693 return;
694}
695
2503a0db
PS		 696static int
697smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
698 struct cifs_sb_info *cifs_sb, const char *full_path)
699{
700 int rc;
2503a0db 701 __le16 *utf16_path;
2e44b288 702 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 703 struct cifs_open_parms oparms;
704 struct cifs_fid fid;
2503a0db 705
a93864d9 706 if ((*full_path == 0) && tcon->crfid.is_valid)
3d4ef9a1
SF		 707 return 0;
708
2503a0db
PS		 709 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
710 if (!utf16_path)
711 return -ENOMEM;
712
064f6047
PS		 713 oparms.tcon = tcon;
714 oparms.desired_access = FILE_READ_ATTRIBUTES;
715 oparms.disposition = FILE_OPEN;
5e19697b
SF		 716 if (backup_cred(cifs_sb))
717 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
718 else
719 oparms.create_options = 0;
064f6047 720 oparms.fid = &fid;
9cbc0b73 721 oparms.reconnect = false;
064f6047 722
9d874c36 723 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2503a0db
PS		 724 if (rc) {
725 kfree(utf16_path);
726 return rc;
727 }
728
064f6047 729 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2503a0db
PS		 730 kfree(utf16_path);
731 return rc;
732}
733
be4cb9e3
PS		 734static int
735smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
736 struct cifs_sb_info *cifs_sb, const char *full_path,
737 u64 *uniqueid, FILE_ALL_INFO *data)
738{
739 *uniqueid = le64_to_cpu(data->IndexNumber);
740 return 0;
741}
742
b7546bc5
PS		 743static int
744smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
745 struct cifs_fid *fid, FILE_ALL_INFO *data)
746{
747 int rc;
748 struct smb2_file_all_info *smb2_data;
749
1bbe4997 750 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
b7546bc5
PS		 751 GFP_KERNEL);
752 if (smb2_data == NULL)
753 return -ENOMEM;
754
755 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
756 smb2_data);
757 if (!rc)
758 move_smb2_info_to_cifs(data, smb2_data);
759 kfree(smb2_data);
760 return rc;
761}
762
1368f155 763#ifdef CONFIG_CIFS_XATTR
95907fea
RS		 764static ssize_t
765move_smb2_ea_to_cifs(char *dst, size_t dst_size,
766 struct smb2_file_full_ea_info *src, size_t src_size,
767 const unsigned char *ea_name)
768{
769 int rc = 0;
770 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
771 char *name, *value;
0c5d6cb6 772 size_t buf_size = dst_size;
95907fea
RS		 773 size_t name_len, value_len, user_name_len;
774
775 while (src_size > 0) {
776 name = &src->ea_data[0];
777 name_len = (size_t)src->ea_name_length;
778 value = &src->ea_data[src->ea_name_length + 1];
779 value_len = (size_t)le16_to_cpu(src->ea_value_length);
780
781 if (name_len == 0) {
782 break;
783 }
784
785 if (src_size < 8 + name_len + 1 + value_len) {
786 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
787 rc = -EIO;
788 goto out;
789 }
790
791 if (ea_name) {
792 if (ea_name_len == name_len &&
793 memcmp(ea_name, name, name_len) == 0) {
794 rc = value_len;
795 if (dst_size == 0)
796 goto out;
797 if (dst_size < value_len) {
798 rc = -ERANGE;
799 goto out;
800 }
801 memcpy(dst, value, value_len);
802 goto out;
803 }
804 } else {
805 /* 'user.' plus a terminating null */
806 user_name_len = 5 + 1 + name_len;
807
0c5d6cb6
RS		 808 if (buf_size == 0) {
809 /* skip copy - calc size only */
810 rc += user_name_len;
811 } else if (dst_size >= user_name_len) {
95907fea
RS		 812 dst_size -= user_name_len;
813 memcpy(dst, "user.", 5);
814 dst += 5;
815 memcpy(dst, src->ea_data, name_len);
816 dst += name_len;
817 *dst = 0;
818 ++dst;
0c5d6cb6 819 rc += user_name_len;
95907fea
RS		 820 } else {
821 /* stop before overrun buffer */
822 rc = -ERANGE;
823 break;
824 }
825 }
826
827 if (!src->next_entry_offset)
828 break;
829
830 if (src_size < le32_to_cpu(src->next_entry_offset)) {
831 /* stop before overrun buffer */
832 rc = -ERANGE;
833 break;
834 }
835 src_size -= le32_to_cpu(src->next_entry_offset);
836 src = (void *)((char *)src +
837 le32_to_cpu(src->next_entry_offset));
838 }
839
840 /* didn't find the named attribute */
841 if (ea_name)
842 rc = -ENODATA;
843
844out:
845 return (ssize_t)rc;
846}
847
848static ssize_t
849smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
850 const unsigned char *path, const unsigned char *ea_name,
851 char *ea_data, size_t buf_size,
852 struct cifs_sb_info *cifs_sb)
853{
854 int rc;
855 __le16 *utf16_path;
f9793b6f
RS		 856 struct kvec rsp_iov = {NULL, 0};
857 int buftype = CIFS_NO_BUFFER;
858 struct smb2_query_info_rsp *rsp;
859 struct smb2_file_full_ea_info *info = NULL;
95907fea
RS		 860
861 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
862 if (!utf16_path)
863 return -ENOMEM;
864
f9793b6f
RS		 865 rc = smb2_query_info_compound(xid, tcon, utf16_path,
866 FILE_READ_EA,
867 FILE_FULL_EA_INFORMATION,
868 SMB2_O_INFO_FILE,
c4627e66
RS		 869 CIFSMaxBufSize -
870 MAX_SMB2_CREATE_RESPONSE_SIZE -
871 MAX_SMB2_CLOSE_RESPONSE_SIZE,
f9793b6f 872 &rsp_iov, &buftype, cifs_sb);
95907fea 873 if (rc) {
f9793b6f
RS		 874 /*
875 * If ea_name is NULL (listxattr) and there are no EAs,
876 * return 0 as it's not an error. Otherwise, the specified
877 * ea_name was not found.
878 */
879 if (!ea_name && rc == -ENODATA)
880 rc = 0;
881 goto qeas_exit;
95907fea
RS		 882 }
883
f9793b6f
RS		 884 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
885 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
886 le32_to_cpu(rsp->OutputBufferLength),
887 &rsp_iov,
888 sizeof(struct smb2_file_full_ea_info));
889 if (rc)
890 goto qeas_exit;
95907fea 891
f9793b6f
RS		 892 info = (struct smb2_file_full_ea_info *)(
893 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
894 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
895 le32_to_cpu(rsp->OutputBufferLength), ea_name);
95907fea 896
f9793b6f
RS		 897 qeas_exit:
898 kfree(utf16_path);
899 free_rsp_buf(buftype, rsp_iov.iov_base);
95907fea
RS		 900 return rc;
901}
902
5517554e
RS		 903
904static int
905smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
906 const char *path, const char *ea_name, const void *ea_value,
907 const __u16 ea_value_len, const struct nls_table *nls_codepage,
908 struct cifs_sb_info *cifs_sb)
909{
0967e545 910 struct cifs_ses *ses = tcon->ses;
0967e545 911 __le16 *utf16_path = NULL;
5517554e 912 int ea_name_len = strlen(ea_name);
0967e545 913 int flags = 0;
5517554e 914 int len;
0967e545
RS		 915 struct smb_rqst rqst[3];
916 int resp_buftype[3];
917 struct kvec rsp_iov[3];
918 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
919 struct cifs_open_parms oparms;
920 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
921 struct cifs_fid fid;
922 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
923 unsigned int size[1];
924 void *data[1];
925 struct smb2_file_full_ea_info *ea = NULL;
926 struct kvec close_iov[1];
927 int rc;
928
929 if (smb3_encryption_required(tcon))
930 flags |= CIFS_TRANSFORM_REQ;
5517554e
RS		 931
932 if (ea_name_len > 255)
933 return -EINVAL;
934
935 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
936 if (!utf16_path)
937 return -ENOMEM;
938
0967e545
RS		 939 memset(rqst, 0, sizeof(rqst));
940 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
941 memset(rsp_iov, 0, sizeof(rsp_iov));
942
943 /* Open */
944 memset(&open_iov, 0, sizeof(open_iov));
945 rqst[0].rq_iov = open_iov;
946 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
947
948 memset(&oparms, 0, sizeof(oparms));
5517554e
RS		 949 oparms.tcon = tcon;
950 oparms.desired_access = FILE_WRITE_EA;
951 oparms.disposition = FILE_OPEN;
5e19697b
SF		 952 if (backup_cred(cifs_sb))
953 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
954 else
955 oparms.create_options = 0;
5517554e
RS		 956 oparms.fid = &fid;
957 oparms.reconnect = false;
958
0967e545
RS		 959 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
960 if (rc)
961 goto sea_exit;
e77fe73c 962 smb2_set_next_command(tcon, &rqst[0]);
0967e545
RS		 963
964
965 /* Set Info */
966 memset(&si_iov, 0, sizeof(si_iov));
967 rqst[1].rq_iov = si_iov;
968 rqst[1].rq_nvec = 1;
5517554e
RS		 969
970 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
971 ea = kzalloc(len, GFP_KERNEL);
972 if (ea == NULL) {
0967e545
RS		 973 rc = -ENOMEM;
974 goto sea_exit;
5517554e
RS		 975 }
976
977 ea->ea_name_length = ea_name_len;
978 ea->ea_value_length = cpu_to_le16(ea_value_len);
979 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
980 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
981
0967e545
RS		 982 size[0] = len;
983 data[0] = ea;
984
985 rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
986 COMPOUND_FID, current->tgid,
987 FILE_FULL_EA_INFORMATION,
988 SMB2_O_INFO_FILE, 0, data, size);
e77fe73c 989 smb2_set_next_command(tcon, &rqst[1]);
0967e545 990 smb2_set_related(&rqst[1]);
6aa0c114 991
5517554e 992
0967e545
RS		 993 /* Close */
994 memset(&close_iov, 0, sizeof(close_iov));
995 rqst[2].rq_iov = close_iov;
996 rqst[2].rq_nvec = 1;
997 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
998 smb2_set_related(&rqst[2]);
999
1000 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1001 resp_buftype, rsp_iov);
1002
1003 sea_exit:
1004 kfree(ea);
1005 kfree(utf16_path);
1006 SMB2_open_free(&rqst[0]);
1007 SMB2_set_info_free(&rqst[1]);
1008 SMB2_close_free(&rqst[2]);
1009 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1010 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1011 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
5517554e
RS		 1012 return rc;
1013}
1368f155 1014#endif
5517554e 1015
9094fad1
PS		 1016static bool
1017smb2_can_echo(struct TCP_Server_Info *server)
1018{
1019 return server->echoes;
1020}
1021
d60622eb
PS		 1022static void
1023smb2_clear_stats(struct cifs_tcon *tcon)
1024{
d60622eb
PS		 1025 int i;
1026 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1027 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1028 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1029 }
d60622eb
PS		 1030}
1031
769ee6a4
SF		 1032static void
1033smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1034{
1035 seq_puts(m, "\n\tShare Capabilities:");
1036 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1037 seq_puts(m, " DFS,");
1038 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1039 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1040 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1041 seq_puts(m, " SCALEOUT,");
1042 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1043 seq_puts(m, " CLUSTER,");
1044 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1045 seq_puts(m, " ASYMMETRIC,");
1046 if (tcon->capabilities == 0)
1047 seq_puts(m, " None");
af6a12ea
SF		 1048 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1049 seq_puts(m, " Aligned,");
1050 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1051 seq_puts(m, " Partition Aligned,");
1052 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1053 seq_puts(m, " SSD,");
1054 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1055 seq_puts(m, " TRIM-support,");
1056
769ee6a4 1057 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
e0386e44 1058 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
af6a12ea
SF		 1059 if (tcon->perf_sector_size)
1060 seq_printf(m, "\tOptimal sector size: 0x%x",
1061 tcon->perf_sector_size);
e0386e44 1062 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
769ee6a4
SF		 1063}
1064
d60622eb
PS		 1065static void
1066smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1067{
d60622eb
PS		 1068 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1069 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1995d28f
SF		 1070
1071 /*
1072 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1073 * totals (requests sent) since those SMBs are per-session not per tcon
1074 */
52ce1ac4
SF		 1075 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1076 (long long)(tcon->bytes_read),
1077 (long long)(tcon->bytes_written));
fae8044c
SF		 1078 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1079 atomic_read(&tcon->num_local_opens),
1080 atomic_read(&tcon->num_remote_opens));
1995d28f 1081 seq_printf(m, "\nTreeConnects: %d total %d failed",
d60622eb
PS		 1082 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1083 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1995d28f 1084 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
d60622eb
PS		 1085 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1086 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1995d28f 1087 seq_printf(m, "\nCreates: %d total %d failed",
d60622eb
PS		 1088 atomic_read(&sent[SMB2_CREATE_HE]),
1089 atomic_read(&failed[SMB2_CREATE_HE]));
1995d28f 1090 seq_printf(m, "\nCloses: %d total %d failed",
d60622eb
PS		 1091 atomic_read(&sent[SMB2_CLOSE_HE]),
1092 atomic_read(&failed[SMB2_CLOSE_HE]));
1995d28f 1093 seq_printf(m, "\nFlushes: %d total %d failed",
d60622eb
PS		 1094 atomic_read(&sent[SMB2_FLUSH_HE]),
1095 atomic_read(&failed[SMB2_FLUSH_HE]));
1995d28f 1096 seq_printf(m, "\nReads: %d total %d failed",
d60622eb
PS		 1097 atomic_read(&sent[SMB2_READ_HE]),
1098 atomic_read(&failed[SMB2_READ_HE]));
1995d28f 1099 seq_printf(m, "\nWrites: %d total %d failed",
d60622eb
PS		 1100 atomic_read(&sent[SMB2_WRITE_HE]),
1101 atomic_read(&failed[SMB2_WRITE_HE]));
1995d28f 1102 seq_printf(m, "\nLocks: %d total %d failed",
d60622eb
PS		 1103 atomic_read(&sent[SMB2_LOCK_HE]),
1104 atomic_read(&failed[SMB2_LOCK_HE]));
1995d28f 1105 seq_printf(m, "\nIOCTLs: %d total %d failed",
d60622eb
PS		 1106 atomic_read(&sent[SMB2_IOCTL_HE]),
1107 atomic_read(&failed[SMB2_IOCTL_HE]));
1995d28f 1108 seq_printf(m, "\nQueryDirectories: %d total %d failed",
d60622eb
PS		 1109 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1110 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1995d28f 1111 seq_printf(m, "\nChangeNotifies: %d total %d failed",
d60622eb
PS		 1112 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1113 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1995d28f 1114 seq_printf(m, "\nQueryInfos: %d total %d failed",
d60622eb
PS		 1115 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1116 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1995d28f 1117 seq_printf(m, "\nSetInfos: %d total %d failed",
d60622eb
PS		 1118 atomic_read(&sent[SMB2_SET_INFO_HE]),
1119 atomic_read(&failed[SMB2_SET_INFO_HE]));
1120 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1121 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1122 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
d60622eb
PS		 1123}
1124
f0df737e
PS		 1125static void
1126smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1127{
2b0143b5 1128 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
53ef1016
PS		 1129 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1130
f0df737e
PS		 1131 cfile->fid.persistent_fid = fid->persistent_fid;
1132 cfile->fid.volatile_fid = fid->volatile_fid;
dfe33f9a
SF		 1133#ifdef CONFIG_CIFS_DEBUG2
1134 cfile->fid.mid = fid->mid;
1135#endif /* CIFS_DEBUG2 */
42873b0a
PS		 1136 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1137 &fid->purge_cache);
18cceb6a 1138 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
94f87371 1139 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
f0df737e
PS		 1140}
1141
760ad0ca 1142static void
f0df737e
PS		 1143smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1144 struct cifs_fid *fid)
1145{
760ad0ca 1146 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
f0df737e
PS		 1147}
1148
41c1358e
SF		 1149static int
1150SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1151 u64 persistent_fid, u64 volatile_fid,
1152 struct copychunk_ioctl *pcchunk)
1153{
1154 int rc;
1155 unsigned int ret_data_len;
1156 struct resume_key_req *res_key;
1157
1158 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1159 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1160 NULL, 0 /* no input */,
1161 (char **)&res_key, &ret_data_len);
1162
1163 if (rc) {
1164 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1165 goto req_res_key_exit;
1166 }
1167 if (ret_data_len < sizeof(struct resume_key_req)) {
1168 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1169 rc = -EINVAL;
1170 goto req_res_key_exit;
1171 }
1172 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1173
1174req_res_key_exit:
1175 kfree(res_key);
1176 return rc;
1177}
1178
f5b05d62
RS		 1179static int
1180smb2_ioctl_query_info(const unsigned int xid,
8d8b26e5
RS		 1181 struct cifs_tcon *tcon,
1182 __le16 *path, int is_dir,
f5b05d62
RS		 1183 unsigned long p)
1184{
f5b05d62
RS		 1185 struct cifs_ses *ses = tcon->ses;
1186 char __user *arg = (char __user *)p;
1187 struct smb_query_info qi;
1188 struct smb_query_info __user *pqi;
1189 int rc = 0;
1190 int flags = 0;
f5b05d62 1191 struct smb2_query_info_rsp *rsp = NULL;
8d8b26e5
RS		 1192 void *buffer = NULL;
1193 struct smb_rqst rqst[3];
1194 int resp_buftype[3];
1195 struct kvec rsp_iov[3];
1196 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1197 struct cifs_open_parms oparms;
1198 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1199 struct cifs_fid fid;
1200 struct kvec qi_iov[1];
1201 struct kvec close_iov[1];
1202
1203 memset(rqst, 0, sizeof(rqst));
1204 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1205 memset(rsp_iov, 0, sizeof(rsp_iov));
f5b05d62
RS		 1206
1207 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1208 return -EFAULT;
1209
1210 if (qi.output_buffer_length > 1024)
1211 return -EINVAL;
1212
1213 if (!ses || !(ses->server))
1214 return -EIO;
1215
1216 if (smb3_encryption_required(tcon))
1217 flags |= CIFS_TRANSFORM_REQ;
1218
1219 buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL);
1220 if (buffer == NULL)
1221 return -ENOMEM;
1222
1223 if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
1224 qi.output_buffer_length)) {
8d8b26e5
RS		 1225 rc = -EFAULT;
1226 goto iqinf_exit;
f5b05d62
RS		 1227 }
1228
8d8b26e5
RS		 1229 /* Open */
1230 memset(&open_iov, 0, sizeof(open_iov));
1231 rqst[0].rq_iov = open_iov;
1232 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1233
1234 memset(&oparms, 0, sizeof(oparms));
1235 oparms.tcon = tcon;
1236 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1237 oparms.disposition = FILE_OPEN;
1238 if (is_dir)
1239 oparms.create_options = CREATE_NOT_FILE;
1240 else
1241 oparms.create_options = CREATE_NOT_DIR;
1242 oparms.fid = &fid;
1243 oparms.reconnect = false;
1244
1245 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1246 if (rc)
1247 goto iqinf_exit;
e77fe73c 1248 smb2_set_next_command(tcon, &rqst[0]);
8d8b26e5
RS		 1249
1250 /* Query */
1251 memset(&qi_iov, 0, sizeof(qi_iov));
1252 rqst[1].rq_iov = qi_iov;
1253 rqst[1].rq_nvec = 1;
f5b05d62 1254
8d8b26e5 1255 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
f5b05d62
RS		 1256 qi.file_info_class, qi.info_type,
1257 qi.additional_information,
1258 qi.input_buffer_length,
1259 qi.output_buffer_length, buffer);
f5b05d62
RS		 1260 if (rc)
1261 goto iqinf_exit;
e77fe73c 1262 smb2_set_next_command(tcon, &rqst[1]);
8d8b26e5
RS		 1263 smb2_set_related(&rqst[1]);
1264
1265 /* Close */
1266 memset(&close_iov, 0, sizeof(close_iov));
1267 rqst[2].rq_iov = close_iov;
1268 rqst[2].rq_nvec = 1;
f5b05d62 1269
8d8b26e5 1270 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
f5b05d62
RS		 1271 if (rc)
1272 goto iqinf_exit;
8d8b26e5 1273 smb2_set_related(&rqst[2]);
f5b05d62 1274
8d8b26e5
RS		 1275 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1276 resp_buftype, rsp_iov);
1277 if (rc)
1278 goto iqinf_exit;
f5b05d62 1279 pqi = (struct smb_query_info __user *)arg;
8d8b26e5 1280 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
f5b05d62
RS		 1281 if (le32_to_cpu(rsp->OutputBufferLength) < qi.input_buffer_length)
1282 qi.input_buffer_length = le32_to_cpu(rsp->OutputBufferLength);
1283 if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1284 sizeof(qi.input_buffer_length))) {
1285 rc = -EFAULT;
1286 goto iqinf_exit;
1287 }
1288 if (copy_to_user(pqi + 1, rsp->Buffer, qi.input_buffer_length)) {
1289 rc = -EFAULT;
1290 goto iqinf_exit;
1291 }
1292
1293 iqinf_exit:
8d8b26e5
RS		 1294 kfree(buffer);
1295 SMB2_open_free(&rqst[0]);
1296 SMB2_query_info_free(&rqst[1]);
1297 SMB2_close_free(&rqst[2]);
1298 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1299 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1300 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
f5b05d62
RS		 1301 return rc;
1302}
1303
620d8745 1304static ssize_t
312bbc59 1305smb2_copychunk_range(const unsigned int xid,
41c1358e
SF		 1306 struct cifsFileInfo *srcfile,
1307 struct cifsFileInfo *trgtfile, u64 src_off,
1308 u64 len, u64 dest_off)
1309{
1310 int rc;
1311 unsigned int ret_data_len;
1312 struct copychunk_ioctl *pcchunk;
9bf0c9cd
SF		 1313 struct copychunk_ioctl_rsp *retbuf = NULL;
1314 struct cifs_tcon *tcon;
1315 int chunks_copied = 0;
1316 bool chunk_sizes_updated = false;
620d8745 1317 ssize_t bytes_written, total_bytes_written = 0;
41c1358e
SF		 1318
1319 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1320
1321 if (pcchunk == NULL)
1322 return -ENOMEM;
1323
312bbc59 1324 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
41c1358e
SF		 1325 /* Request a key from the server to identify the source of the copy */
1326 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1327 srcfile->fid.persistent_fid,
1328 srcfile->fid.volatile_fid, pcchunk);
1329
1330 /* Note: request_res_key sets res_key null only if rc !=0 */
1331 if (rc)
9bf0c9cd 1332 goto cchunk_out;
41c1358e
SF		 1333
1334 /* For now array only one chunk long, will make more flexible later */
bc09d141 1335 pcchunk->ChunkCount = cpu_to_le32(1);
41c1358e 1336 pcchunk->Reserved = 0;
41c1358e
SF		 1337 pcchunk->Reserved2 = 0;
1338
9bf0c9cd 1339 tcon = tlink_tcon(trgtfile->tlink);
41c1358e 1340
9bf0c9cd
SF		 1341 while (len > 0) {
1342 pcchunk->SourceOffset = cpu_to_le64(src_off);
1343 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1344 pcchunk->Length =
1345 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
41c1358e 1346
9bf0c9cd
SF		 1347 /* Request server copy to target from src identified by key */
1348 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1349 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
63a83b86 1350 true /* is_fsctl */, (char *)pcchunk,
9bf0c9cd
SF		 1351 sizeof(struct copychunk_ioctl), (char **)&retbuf,
1352 &ret_data_len);
1353 if (rc == 0) {
1354 if (ret_data_len !=
1355 sizeof(struct copychunk_ioctl_rsp)) {
1356 cifs_dbg(VFS, "invalid cchunk response size\n");
1357 rc = -EIO;
1358 goto cchunk_out;
1359 }
1360 if (retbuf->TotalBytesWritten == 0) {
1361 cifs_dbg(FYI, "no bytes copied\n");
1362 rc = -EIO;
1363 goto cchunk_out;
1364 }
1365 /*
1366 * Check if server claimed to write more than we asked
1367 */
1368 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1369 le32_to_cpu(pcchunk->Length)) {
1370 cifs_dbg(VFS, "invalid copy chunk response\n");
1371 rc = -EIO;
1372 goto cchunk_out;
1373 }
1374 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1375 cifs_dbg(VFS, "invalid num chunks written\n");
1376 rc = -EIO;
1377 goto cchunk_out;
1378 }
1379 chunks_copied++;
1380
620d8745
SP		 1381 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1382 src_off += bytes_written;
1383 dest_off += bytes_written;
1384 len -= bytes_written;
1385 total_bytes_written += bytes_written;
9bf0c9cd 1386
620d8745 1387 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
9bf0c9cd
SF		 1388 le32_to_cpu(retbuf->ChunksWritten),
1389 le32_to_cpu(retbuf->ChunkBytesWritten),
620d8745 1390 bytes_written);
9bf0c9cd
SF		 1391 } else if (rc == -EINVAL) {
1392 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1393 goto cchunk_out;
1394
1395 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1396 le32_to_cpu(retbuf->ChunksWritten),
1397 le32_to_cpu(retbuf->ChunkBytesWritten),
1398 le32_to_cpu(retbuf->TotalBytesWritten));
1399
1400 /*
1401 * Check if this is the first request using these sizes,
1402 * (ie check if copy succeed once with original sizes
1403 * and check if the server gave us different sizes after
1404 * we already updated max sizes on previous request).
1405 * if not then why is the server returning an error now
1406 */
1407 if ((chunks_copied != 0) || chunk_sizes_updated)
1408 goto cchunk_out;
1409
1410 /* Check that server is not asking us to grow size */
1411 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1412 tcon->max_bytes_chunk)
1413 tcon->max_bytes_chunk =
1414 le32_to_cpu(retbuf->ChunkBytesWritten);
1415 else
1416 goto cchunk_out; /* server gave us bogus size */
1417
1418 /* No need to change MaxChunks since already set to 1 */
1419 chunk_sizes_updated = true;
2477bc58
SP		 1420 } else
1421 goto cchunk_out;
9bf0c9cd 1422 }
41c1358e 1423
9bf0c9cd 1424cchunk_out:
41c1358e 1425 kfree(pcchunk);
24df1483 1426 kfree(retbuf);
620d8745
SP		 1427 if (rc)
1428 return rc;
1429 else
1430 return total_bytes_written;
41c1358e
SF		 1431}
1432
7a5cfb19
PS		 1433static int
1434smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1435 struct cifs_fid *fid)
1436{
1437 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1438}
1439
09a4707e
PS		 1440static unsigned int
1441smb2_read_data_offset(char *buf)
1442{
1443 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1444 return rsp->DataOffset;
1445}
1446
1447static unsigned int
74dcf418 1448smb2_read_data_length(char *buf, bool in_remaining)
09a4707e
PS		 1449{
1450 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
74dcf418
LL		 1451
1452 if (in_remaining)
1453 return le32_to_cpu(rsp->DataRemaining);
1454
09a4707e
PS		 1455 return le32_to_cpu(rsp->DataLength);
1456}
1457
d8e05039
PS		 1458
1459static int
db8b631d 1460smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
d8e05039
PS		 1461 struct cifs_io_parms *parms, unsigned int *bytes_read,
1462 char **buf, int *buf_type)
1463{
db8b631d
SF		 1464 parms->persistent_fid = pfid->persistent_fid;
1465 parms->volatile_fid = pfid->volatile_fid;
d8e05039
PS		 1466 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1467}
1468
009d3443 1469static int
db8b631d 1470smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
009d3443
PS		 1471 struct cifs_io_parms *parms, unsigned int *written,
1472 struct kvec *iov, unsigned long nr_segs)
1473{
1474
db8b631d
SF		 1475 parms->persistent_fid = pfid->persistent_fid;
1476 parms->volatile_fid = pfid->volatile_fid;
009d3443
PS		 1477 return SMB2_write(xid, parms, written, iov, nr_segs);
1478}
1479
d43cc793
SF		 1480/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1481static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1482 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1483{
1484 struct cifsInodeInfo *cifsi;
1485 int rc;
1486
1487 cifsi = CIFS_I(inode);
1488
1489 /* if file already sparse don't bother setting sparse again */
1490 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1491 return true; /* already sparse */
1492
1493 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1494 return true; /* already not sparse */
1495
1496 /*
1497 * Can't check for sparse support on share the usual way via the
1498 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1499 * since Samba server doesn't set the flag on the share, yet
1500 * supports the set sparse FSCTL and returns sparse correctly
1501 * in the file attributes. If we fail setting sparse though we
1502 * mark that server does not support sparse files for this share
1503 * to avoid repeatedly sending the unsupported fsctl to server
1504 * if the file is repeatedly extended.
1505 */
1506 if (tcon->broken_sparse_sup)
1507 return false;
1508
1509 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1510 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
63a83b86 1511 true /* is_fctl */,
51146625 1512 &setsparse, 1, NULL, NULL);
d43cc793
SF		 1513 if (rc) {
1514 tcon->broken_sparse_sup = true;
1515 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1516 return false;
1517 }
1518
1519 if (setsparse)
1520 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1521 else
1522 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1523
1524 return true;
1525}
1526
c839ff24
PS		 1527static int
1528smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1529 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1530{
1531 __le64 eof = cpu_to_le64(size);
3d1a3745
SF		 1532 struct inode *inode;
1533
1534 /*
1535 * If extending file more than one page make sparse. Many Linux fs
1536 * make files sparse by default when extending via ftruncate
1537 */
2b0143b5 1538 inode = d_inode(cfile->dentry);
3d1a3745
SF		 1539
1540 if (!set_alloc && (size > inode->i_size + 8192)) {
3d1a3745 1541 __u8 set_sparse = 1;
d43cc793
SF		 1542
1543 /* whether set sparse succeeds or not, extend the file */
1544 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
3d1a3745
SF		 1545 }
1546
c839ff24 1547 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3764cbd1 1548 cfile->fid.volatile_fid, cfile->pid, &eof);
c839ff24
PS		 1549}
1550
02b16665
SF		 1551static int
1552smb2_duplicate_extents(const unsigned int xid,
1553 struct cifsFileInfo *srcfile,
1554 struct cifsFileInfo *trgtfile, u64 src_off,
1555 u64 len, u64 dest_off)
1556{
1557 int rc;
1558 unsigned int ret_data_len;
02b16665
SF		 1559 struct duplicate_extents_to_file dup_ext_buf;
1560 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1561
1562 /* server fileays advertise duplicate extent support with this flag */
1563 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1564 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1565 return -EOPNOTSUPP;
1566
1567 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1568 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1569 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1570 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1571 dup_ext_buf.ByteCount = cpu_to_le64(len);
1572 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1573 src_off, dest_off, len);
1574
1575 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1576 if (rc)
1577 goto duplicate_extents_out;
1578
1579 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1580 trgtfile->fid.volatile_fid,
1581 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
63a83b86 1582 true /* is_fsctl */,
51146625 1583 (char *)&dup_ext_buf,
02b16665 1584 sizeof(struct duplicate_extents_to_file),
24df1483 1585 NULL,
02b16665
SF		 1586 &ret_data_len);
1587
1588 if (ret_data_len > 0)
1589 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1590
1591duplicate_extents_out:
1592 return rc;
1593}
02b16665 1594
64a5cfa6
SF		 1595static int
1596smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1597 struct cifsFileInfo *cfile)
1598{
1599 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1600 cfile->fid.volatile_fid);
1601}
1602
b3152e2c
SF		 1603static int
1604smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1605 struct cifsFileInfo *cfile)
1606{
1607 struct fsctl_set_integrity_information_req integr_info;
b3152e2c
SF		 1608 unsigned int ret_data_len;
1609
1610 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1611 integr_info.Flags = 0;
1612 integr_info.Reserved = 0;
1613
1614 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1615 cfile->fid.volatile_fid,
1616 FSCTL_SET_INTEGRITY_INFORMATION,
63a83b86 1617 true /* is_fsctl */,
51146625 1618 (char *)&integr_info,
b3152e2c 1619 sizeof(struct fsctl_set_integrity_information_req),
24df1483 1620 NULL,
b3152e2c
SF		 1621 &ret_data_len);
1622
1623}
1624
e02789a5
SF		 1625/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1626#define GMT_TOKEN_SIZE 50
1627
1628/*
1629 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1630 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1631 */
834170c8
SF		 1632static int
1633smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1634 struct cifsFileInfo *cfile, void __user *ioc_buf)
1635{
1636 char *retbuf = NULL;
1637 unsigned int ret_data_len = 0;
1638 int rc;
1639 struct smb_snapshot_array snapshot_in;
1640
1641 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1642 cfile->fid.volatile_fid,
1643 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
63a83b86 1644 true /* is_fsctl */,
51146625 1645 NULL, 0 /* no input data */,
834170c8
SF		 1646 (char **)&retbuf,
1647 &ret_data_len);
1648 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1649 rc, ret_data_len);
1650 if (rc)
1651 return rc;
1652
1653 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1654 /* Fixup buffer */
1655 if (copy_from_user(&snapshot_in, ioc_buf,
1656 sizeof(struct smb_snapshot_array))) {
1657 rc = -EFAULT;
1658 kfree(retbuf);
1659 return rc;
1660 }
834170c8 1661
e02789a5
SF		 1662 /*
1663 * Check for min size, ie not large enough to fit even one GMT
1664 * token (snapshot). On the first ioctl some users may pass in
1665 * smaller size (or zero) to simply get the size of the array
1666 * so the user space caller can allocate sufficient memory
1667 * and retry the ioctl again with larger array size sufficient
1668 * to hold all of the snapshot GMT tokens on the second try.
1669 */
1670 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
1671 ret_data_len = sizeof(struct smb_snapshot_array);
1672
1673 /*
1674 * We return struct SRV_SNAPSHOT_ARRAY, followed by
1675 * the snapshot array (of 50 byte GMT tokens) each
1676 * representing an available previous version of the data
1677 */
1678 if (ret_data_len > (snapshot_in.snapshot_array_size +
1679 sizeof(struct smb_snapshot_array)))
1680 ret_data_len = snapshot_in.snapshot_array_size +
1681 sizeof(struct smb_snapshot_array);
834170c8
SF		 1682
1683 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1684 rc = -EFAULT;
1685 }
1686
1687 kfree(retbuf);
1688 return rc;
1689}
1690
d324f08d
PS		 1691static int
1692smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1693 const char *path, struct cifs_sb_info *cifs_sb,
1694 struct cifs_fid *fid, __u16 search_flags,
1695 struct cifs_search_info *srch_inf)
1696{
1697 __le16 *utf16_path;
1698 int rc;
2e44b288 1699 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047 1700 struct cifs_open_parms oparms;
d324f08d
PS		 1701
1702 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1703 if (!utf16_path)
1704 return -ENOMEM;
1705
064f6047
PS		 1706 oparms.tcon = tcon;
1707 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1708 oparms.disposition = FILE_OPEN;
5e19697b
SF		 1709 if (backup_cred(cifs_sb))
1710 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1711 else
1712 oparms.create_options = 0;
064f6047 1713 oparms.fid = fid;
9cbc0b73 1714 oparms.reconnect = false;
064f6047 1715
9d874c36 1716 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
d324f08d
PS		 1717 kfree(utf16_path);
1718 if (rc) {
dcd87838 1719 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
d324f08d
PS		 1720 return rc;
1721 }
1722
1723 srch_inf->entries_in_buffer = 0;
0595751f 1724 srch_inf->index_of_last_entry = 2;
d324f08d 1725
064f6047
PS		 1726 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1727 fid->volatile_fid, 0, srch_inf);
d324f08d 1728 if (rc) {
dcd87838 1729 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
064f6047 1730 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
d324f08d
PS		 1731 }
1732 return rc;
1733}
1734
1735static int
1736smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1737 struct cifs_fid *fid, __u16 search_flags,
1738 struct cifs_search_info *srch_inf)
1739{
1740 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1741 fid->volatile_fid, 0, srch_inf);
1742}
1743
1744static int
1745smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1746 struct cifs_fid *fid)
1747{
1748 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1749}
1750
2e44b288
PS		 1751/*
1752* If we negotiate SMB2 protocol and get STATUS_PENDING - update
1753* the number of credits and return true. Otherwise - return false.
1754*/
1755static bool
1756smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1757{
49f466bd 1758 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2e44b288 1759
31473fc4 1760 if (shdr->Status != STATUS_PENDING)
2e44b288
PS		 1761 return false;
1762
1763 if (!length) {
1764 spin_lock(&server->req_lock);
31473fc4 1765 server->credits += le16_to_cpu(shdr->CreditRequest);
2e44b288
PS		 1766 spin_unlock(&server->req_lock);
1767 wake_up(&server->request_q);
1768 }
1769
1770 return true;
1771}
1772
511c54a2
PS		 1773static bool
1774smb2_is_session_expired(char *buf)
1775{
49f466bd 1776 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
511c54a2 1777
d81243c6
MS		 1778 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1779 shdr->Status != STATUS_USER_SESSION_DELETED)
511c54a2
PS		 1780 return false;
1781
e68a932b
SF		 1782 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
1783 le16_to_cpu(shdr->Command),
1784 le64_to_cpu(shdr->MessageId));
d81243c6 1785 cifs_dbg(FYI, "Session expired or deleted\n");
e68a932b 1786
511c54a2
PS		 1787 return true;
1788}
1789
983c88a4
PS		 1790static int
1791smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1792 struct cifsInodeInfo *cinode)
1793{
0822f514
PS		 1794 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1795 return SMB2_lease_break(0, tcon, cinode->lease_key,
1796 smb2_get_lease_state(cinode));
1797
983c88a4
PS		 1798 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1799 fid->volatile_fid,
18cceb6a 1800 CIFS_CACHE_READ(cinode) ? 1 : 0);
983c88a4
PS		 1801}
1802
c5a5f38f 1803void
730928c8
RS		 1804smb2_set_related(struct smb_rqst *rqst)
1805{
1806 struct smb2_sync_hdr *shdr;
1807
1808 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1809 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
1810}
1811
1812char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
1813
c5a5f38f 1814void
e77fe73c 1815smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
730928c8
RS		 1816{
1817 struct smb2_sync_hdr *shdr;
e77fe73c
RS		 1818 struct cifs_ses *ses = tcon->ses;
1819 struct TCP_Server_Info *server = ses->server;
730928c8 1820 unsigned long len = smb_rqst_len(server, rqst);
e77fe73c 1821 int i, num_padding;
730928c8
RS		 1822
1823 /* SMB headers in a compound are 8 byte aligned. */
e77fe73c
RS		 1824
1825 /* No padding needed */
1826 if (!(len & 7))
1827 goto finished;
1828
1829 num_padding = 8 - (len & 7);
1830 if (!smb3_encryption_required(tcon)) {
1831 /*
1832 * If we do not have encryption then we can just add an extra
1833 * iov for the padding.
1834 */
1835 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
1836 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
1837 rqst->rq_nvec++;
1838 len += num_padding;
1839 } else {
1840 /*
1841 * We can not add a small padding iov for the encryption case
1842 * because the encryption framework can not handle the padding
1843 * iovs.
1844 * We have to flatten this into a single buffer and add
1845 * the padding to it.
1846 */
1847 for (i = 1; i < rqst->rq_nvec; i++) {
1848 memcpy(rqst->rq_iov[0].iov_base +
1849 rqst->rq_iov[0].iov_len,
1850 rqst->rq_iov[i].iov_base,
1851 rqst->rq_iov[i].iov_len);
1852 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
271b9c0c 1853 }
e77fe73c
RS		 1854 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
1855 0, num_padding);
1856 rqst->rq_iov[0].iov_len += num_padding;
1857 len += num_padding;
1858 rqst->rq_nvec = 1;
730928c8
RS		 1859 }
1860
e77fe73c 1861 finished:
730928c8
RS		 1862 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
1863 shdr->NextCommand = cpu_to_le32(len);
1864}
1865
07d3b2e4
RS		 1866/*
1867 * Passes the query info response back to the caller on success.
1868 * Caller need to free this with free_rsp_buf().
1869 */
f9793b6f 1870int
07d3b2e4
RS		 1871smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
1872 __le16 *utf16_path, u32 desired_access,
1873 u32 class, u32 type, u32 output_len,
f9793b6f
RS		 1874 struct kvec *rsp, int *buftype,
1875 struct cifs_sb_info *cifs_sb)
6fc05c25 1876{
07d3b2e4 1877 struct cifs_ses *ses = tcon->ses;
07d3b2e4 1878 int flags = 0;
730928c8
RS		 1879 struct smb_rqst rqst[3];
1880 int resp_buftype[3];
1881 struct kvec rsp_iov[3];
4d8dfafc 1882 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
730928c8
RS		 1883 struct kvec qi_iov[1];
1884 struct kvec close_iov[1];
6fc05c25 1885 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 1886 struct cifs_open_parms oparms;
1887 struct cifs_fid fid;
730928c8
RS		 1888 int rc;
1889
1890 if (smb3_encryption_required(tcon))
1891 flags |= CIFS_TRANSFORM_REQ;
1892
1893 memset(rqst, 0, sizeof(rqst));
c5a5f38f 1894 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
730928c8
RS		 1895 memset(rsp_iov, 0, sizeof(rsp_iov));
1896
1897 memset(&open_iov, 0, sizeof(open_iov));
1898 rqst[0].rq_iov = open_iov;
4d8dfafc 1899 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
064f6047
PS		 1900
1901 oparms.tcon = tcon;
07d3b2e4 1902 oparms.desired_access = desired_access;
064f6047 1903 oparms.disposition = FILE_OPEN;
f9793b6f
RS		 1904 if (cifs_sb && backup_cred(cifs_sb))
1905 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1906 else
1907 oparms.create_options = 0;
064f6047 1908 oparms.fid = &fid;
9cbc0b73 1909 oparms.reconnect = false;
6fc05c25 1910
07d3b2e4 1911 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
6fc05c25 1912 if (rc)
07d3b2e4 1913 goto qic_exit;
e77fe73c 1914 smb2_set_next_command(tcon, &rqst[0]);
730928c8
RS		 1915
1916 memset(&qi_iov, 0, sizeof(qi_iov));
1917 rqst[1].rq_iov = qi_iov;
1918 rqst[1].rq_nvec = 1;
1919
1920 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
07d3b2e4
RS		 1921 class, type, 0,
1922 output_len, 0,
f5b05d62 1923 NULL);
730928c8 1924 if (rc)
07d3b2e4 1925 goto qic_exit;
e77fe73c 1926 smb2_set_next_command(tcon, &rqst[1]);
730928c8
RS		 1927 smb2_set_related(&rqst[1]);
1928
1929 memset(&close_iov, 0, sizeof(close_iov));
1930 rqst[2].rq_iov = close_iov;
1931 rqst[2].rq_nvec = 1;
1932
1933 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1934 if (rc)
07d3b2e4 1935 goto qic_exit;
730928c8
RS		 1936 smb2_set_related(&rqst[2]);
1937
1938 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1939 resp_buftype, rsp_iov);
f9793b6f
RS		 1940 if (rc) {
1941 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
07d3b2e4 1942 goto qic_exit;
f9793b6f 1943 }
07d3b2e4
RS		 1944 *rsp = rsp_iov[1];
1945 *buftype = resp_buftype[1];
1946
1947 qic_exit:
1948 SMB2_open_free(&rqst[0]);
1949 SMB2_query_info_free(&rqst[1]);
1950 SMB2_close_free(&rqst[2]);
1951 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1952 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1953 return rc;
1954}
1955
1956static int
1957smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1958 struct kstatfs *buf)
1959{
1960 struct smb2_query_info_rsp *rsp;
1961 struct smb2_fs_full_size_info *info = NULL;
1962 __le16 utf16_path = 0; /* Null - open root of share */
1963 struct kvec rsp_iov = {NULL, 0};
1964 int buftype = CIFS_NO_BUFFER;
1965 int rc;
1966
1967
1968 rc = smb2_query_info_compound(xid, tcon, &utf16_path,
1969 FILE_READ_ATTRIBUTES,
1970 FS_FULL_SIZE_INFORMATION,
1971 SMB2_O_INFO_FILESYSTEM,
1972 sizeof(struct smb2_fs_full_size_info),
f9793b6f 1973 &rsp_iov, &buftype, NULL);
730928c8
RS		 1974 if (rc)
1975 goto qfs_exit;
1976
07d3b2e4 1977 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 1978 buf->f_type = SMB2_MAGIC_NUMBER;
730928c8
RS		 1979 info = (struct smb2_fs_full_size_info *)(
1980 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1981 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1982 le32_to_cpu(rsp->OutputBufferLength),
07d3b2e4 1983 &rsp_iov,
730928c8
RS		 1984 sizeof(struct smb2_fs_full_size_info));
1985 if (!rc)
1986 smb2_copy_fs_info_to_kstatfs(info, buf);
1987
1988qfs_exit:
07d3b2e4 1989 free_rsp_buf(buftype, rsp_iov.iov_base);
6fc05c25
PS		 1990 return rc;
1991}
1992
2d304217
SF		 1993static int
1994smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1995 struct kstatfs *buf)
1996{
1997 int rc;
1998 __le16 srch_path = 0; /* Null - open root of share */
1999 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2000 struct cifs_open_parms oparms;
2001 struct cifs_fid fid;
2002
2003 if (!tcon->posix_extensions)
2004 return smb2_queryfs(xid, tcon, buf);
2005
2006 oparms.tcon = tcon;
2007 oparms.desired_access = FILE_READ_ATTRIBUTES;
2008 oparms.disposition = FILE_OPEN;
2009 oparms.create_options = 0;
2010 oparms.fid = &fid;
2011 oparms.reconnect = false;
2012
2013 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2014 if (rc)
2015 return rc;
2016
2017 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2018 fid.volatile_fid, buf);
2019 buf->f_type = SMB2_MAGIC_NUMBER;
2020 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2021 return rc;
2022}
2d304217 2023
027e8eec
PS		 2024static bool
2025smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2026{
2027 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2028 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2029}
2030
f7ba7fe6
PS		 2031static int
2032smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2033 __u64 length, __u32 type, int lock, int unlock, bool wait)
2034{
2035 if (unlock && !lock)
2036 type = SMB2_LOCKFLAG_UNLOCK;
2037 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2038 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2039 current->tgid, length, offset, type, wait);
2040}
2041
b8c32dbb
PS		 2042static void
2043smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2044{
2045 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2046}
2047
2048static void
2049smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2050{
2051 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2052}
2053
2054static void
2055smb2_new_lease_key(struct cifs_fid *fid)
2056{
fa70b87c 2057 generate_random_uuid(fid->lease_key);
b8c32dbb
PS		 2058}
2059
9d49640a
AA		 2060static int
2061smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2062 const char *search_name,
2063 struct dfs_info3_param **target_nodes,
2064 unsigned int *num_of_nodes,
2065 const struct nls_table *nls_codepage, int remap)
2066{
2067 int rc;
2068 __le16 *utf16_path = NULL;
2069 int utf16_path_len = 0;
2070 struct cifs_tcon *tcon;
2071 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2072 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2073 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2074
2075 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
2076
2077 /*
63a83b86 2078 * Try to use the IPC tcon, otherwise just use any
9d49640a 2079 */
63a83b86
AA		 2080 tcon = ses->tcon_ipc;
2081 if (tcon == NULL) {
2082 spin_lock(&cifs_tcp_ses_lock);
2083 tcon = list_first_entry_or_null(&ses->tcon_list,
2084 struct cifs_tcon,
2085 tcon_list);
2086 if (tcon)
2087 tcon->tc_count++;
2088 spin_unlock(&cifs_tcp_ses_lock);
2089 }
2090
2091 if (tcon == NULL) {
9d49640a
AA		 2092 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2093 ses);
2094 rc = -ENOTCONN;
2095 goto out;
2096 }
2097
2098 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2099 &utf16_path_len,
2100 nls_codepage, remap);
2101 if (!utf16_path) {
2102 rc = -ENOMEM;
2103 goto out;
2104 }
2105
2106 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2107 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2108 if (!dfs_req) {
2109 rc = -ENOMEM;
2110 goto out;
2111 }
2112
2113 /* Highest DFS referral version understood */
2114 dfs_req->MaxReferralLevel = DFS_VERSION;
2115
2116 /* Path to resolve in an UTF-16 null-terminated string */
2117 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2118
2119 do {
9d49640a
AA		 2120 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2121 FSCTL_DFS_GET_REFERRALS,
63a83b86 2122 true /* is_fsctl */,
9d49640a
AA		 2123 (char *)dfs_req, dfs_req_size,
2124 (char **)&dfs_rsp, &dfs_rsp_size);
9d49640a
AA		 2125 } while (rc == -EAGAIN);
2126
2127 if (rc) {
2564f2ff 2128 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
5702591f 2129 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
9d49640a
AA		 2130 goto out;
2131 }
2132
2133 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2134 num_of_nodes, target_nodes,
2135 nls_codepage, remap, search_name,
2136 true /* is_unicode */);
2137 if (rc) {
2138 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
2139 goto out;
2140 }
2141
2142 out:
63a83b86
AA		 2143 if (tcon && !tcon->ipc) {
2144 /* ipc tcons are not refcounted */
9d49640a
AA		 2145 spin_lock(&cifs_tcp_ses_lock);
2146 tcon->tc_count--;
2147 spin_unlock(&cifs_tcp_ses_lock);
2148 }
2149 kfree(utf16_path);
2150 kfree(dfs_req);
2151 kfree(dfs_rsp);
2152 return rc;
2153}
7893242e
PS		 2154#define SMB2_SYMLINK_STRUCT_SIZE \
2155 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2156
b42bf888
PS		 2157static int
2158smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2159 const char *full_path, char **target_path,
2160 struct cifs_sb_info *cifs_sb)
2161{
2162 int rc;
2163 __le16 *utf16_path;
2164 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2165 struct cifs_open_parms oparms;
2166 struct cifs_fid fid;
91cb74f5 2167 struct kvec err_iov = {NULL, 0};
9d874c36
RS		 2168 struct smb2_err_rsp *err_buf = NULL;
2169 int resp_buftype;
b42bf888 2170 struct smb2_symlink_err_rsp *symlink;
7893242e
PS		 2171 unsigned int sub_len;
2172 unsigned int sub_offset;
2173 unsigned int print_len;
2174 unsigned int print_offset;
b42bf888
PS		 2175
2176 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2177
2178 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2179 if (!utf16_path)
2180 return -ENOMEM;
2181
2182 oparms.tcon = tcon;
2183 oparms.desired_access = FILE_READ_ATTRIBUTES;
2184 oparms.disposition = FILE_OPEN;
5e19697b
SF		 2185 if (backup_cred(cifs_sb))
2186 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2187 else
2188 oparms.create_options = 0;
b42bf888
PS		 2189 oparms.fid = &fid;
2190 oparms.reconnect = false;
2191
9d874c36
RS		 2192 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
2193 &resp_buftype);
0d568cd3 2194 if (!rc || !err_iov.iov_base) {
9d874c36 2195 rc = -ENOENT;
ff361fda 2196 goto free_path;
b42bf888 2197 }
7893242e 2198
91cb74f5 2199 err_buf = err_iov.iov_base;
7893242e 2200 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1fc6ad2f 2201 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
9d874c36
RS		 2202 rc = -ENOENT;
2203 goto querty_exit;
7893242e
PS		 2204 }
2205
b42bf888
PS		 2206 /* open must fail on symlink - reset rc */
2207 rc = 0;
2208 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2209 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2210 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
7893242e
PS		 2211 print_len = le16_to_cpu(symlink->PrintNameLength);
2212 print_offset = le16_to_cpu(symlink->PrintNameOffset);
2213
1fc6ad2f 2214 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
9d874c36
RS		 2215 rc = -ENOENT;
2216 goto querty_exit;
7893242e
PS		 2217 }
2218
1fc6ad2f
RS		 2219 if (err_iov.iov_len <
2220 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
9d874c36
RS		 2221 rc = -ENOENT;
2222 goto querty_exit;
7893242e
PS		 2223 }
2224
b42bf888
PS		 2225 *target_path = cifs_strndup_from_utf16(
2226 (char *)symlink->PathBuffer + sub_offset,
2227 sub_len, true, cifs_sb->local_nls);
2228 if (!(*target_path)) {
9d874c36
RS		 2229 rc = -ENOMEM;
2230 goto querty_exit;
b42bf888
PS		 2231 }
2232 convert_delimiter(*target_path, '/');
2233 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
9d874c36
RS		 2234
2235 querty_exit:
2236 free_rsp_buf(resp_buftype, err_buf);
ff361fda 2237 free_path:
b42bf888
PS		 2238 kfree(utf16_path);
2239 return rc;
2240}
2241
84908426 2242#ifdef CONFIG_CIFS_ACL
2f1afe25
SP		 2243static struct cifs_ntsd *
2244get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2245 const struct cifs_fid *cifsfid, u32 *pacllen)
2246{
2247 struct cifs_ntsd *pntsd = NULL;
2248 unsigned int xid;
2249 int rc = -EOPNOTSUPP;
2250 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2251
2252 if (IS_ERR(tlink))
2253 return ERR_CAST(tlink);
2254
2255 xid = get_xid();
2256 cifs_dbg(FYI, "trying to get acl\n");
2257
2258 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2259 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2260 free_xid(xid);
2261
2262 cifs_put_tlink(tlink);
2263
2264 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2265 if (rc)
2266 return ERR_PTR(rc);
2267 return pntsd;
2268
2269}
2270
2271static struct cifs_ntsd *
2272get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2273 const char *path, u32 *pacllen)
2274{
2275 struct cifs_ntsd *pntsd = NULL;
2276 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2277 unsigned int xid;
2278 int rc;
2279 struct cifs_tcon *tcon;
2280 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2281 struct cifs_fid fid;
2282 struct cifs_open_parms oparms;
2283 __le16 *utf16_path;
2284
2285 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2286 if (IS_ERR(tlink))
2287 return ERR_CAST(tlink);
2288
2289 tcon = tlink_tcon(tlink);
2290 xid = get_xid();
2291
2292 if (backup_cred(cifs_sb))
709340a0 2293 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2f1afe25
SP		 2294 else
2295 oparms.create_options = 0;
2296
2297 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 2298 if (!utf16_path) {
2299 rc = -ENOMEM;
2300 free_xid(xid);
2301 return ERR_PTR(rc);
2302 }
2f1afe25
SP		 2303
2304 oparms.tcon = tcon;
2305 oparms.desired_access = READ_CONTROL;
2306 oparms.disposition = FILE_OPEN;
2307 oparms.fid = &fid;
2308 oparms.reconnect = false;
2309
9d874c36 2310 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2f1afe25
SP		 2311 kfree(utf16_path);
2312 if (!rc) {
2313 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2314 fid.volatile_fid, (void **)&pntsd, pacllen);
2315 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2316 }
2317
2318 cifs_put_tlink(tlink);
2319 free_xid(xid);
2320
2321 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2322 if (rc)
2323 return ERR_PTR(rc);
2324 return pntsd;
2325}
2326
366ed846
SP		 2327#ifdef CONFIG_CIFS_ACL
2328static int
2329set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2330 struct inode *inode, const char *path, int aclflag)
2331{
2332 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2333 unsigned int xid;
2334 int rc, access_flags = 0;
2335 struct cifs_tcon *tcon;
2336 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2337 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2338 struct cifs_fid fid;
2339 struct cifs_open_parms oparms;
2340 __le16 *utf16_path;
2341
2342 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2343 if (IS_ERR(tlink))
2344 return PTR_ERR(tlink);
2345
2346 tcon = tlink_tcon(tlink);
2347 xid = get_xid();
2348
2349 if (backup_cred(cifs_sb))
2350 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2351 else
2352 oparms.create_options = 0;
2353
2354 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2355 access_flags = WRITE_OWNER;
2356 else
2357 access_flags = WRITE_DAC;
2358
2359 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 2360 if (!utf16_path) {
2361 rc = -ENOMEM;
2362 free_xid(xid);
2363 return rc;
2364 }
366ed846
SP		 2365
2366 oparms.tcon = tcon;
2367 oparms.desired_access = access_flags;
2368 oparms.disposition = FILE_OPEN;
2369 oparms.path = path;
2370 oparms.fid = &fid;
2371 oparms.reconnect = false;
2372
9d874c36 2373 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
366ed846
SP		 2374 kfree(utf16_path);
2375 if (!rc) {
2376 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2377 fid.volatile_fid, pnntsd, acllen, aclflag);
2378 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2379 }
2380
2381 cifs_put_tlink(tlink);
2382 free_xid(xid);
2383 return rc;
2384}
2385#endif /* CIFS_ACL */
2386
2f1afe25
SP		 2387/* Retrieve an ACL from the server */
2388static struct cifs_ntsd *
2389get_smb2_acl(struct cifs_sb_info *cifs_sb,
2390 struct inode *inode, const char *path,
2391 u32 *pacllen)
2392{
2393 struct cifs_ntsd *pntsd = NULL;
2394 struct cifsFileInfo *open_file = NULL;
2395
2396 if (inode)
2397 open_file = find_readable_file(CIFS_I(inode), true);
2398 if (!open_file)
2399 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
2400
2401 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
2402 cifsFileInfo_put(open_file);
2403 return pntsd;
2404}
84908426 2405#endif
2f1afe25 2406
30175628
SF		 2407static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
2408 loff_t offset, loff_t len, bool keep_size)
2409{
2410 struct inode *inode;
2411 struct cifsInodeInfo *cifsi;
2412 struct cifsFileInfo *cfile = file->private_data;
2413 struct file_zero_data_information fsctl_buf;
2414 long rc;
2415 unsigned int xid;
2416
2417 xid = get_xid();
2418
2b0143b5 2419 inode = d_inode(cfile->dentry);
30175628
SF		 2420 cifsi = CIFS_I(inode);
2421
2422 /* if file not oplocked can't be sure whether asking to extend size */
2423 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 2424 if (keep_size == false) {
2425 rc = -EOPNOTSUPP;
2426 free_xid(xid);
2427 return rc;
2428 }
30175628 2429
2bb93d24 2430 /*
30175628
SF		 2431 * Must check if file sparse since fallocate -z (zero range) assumes
2432 * non-sparse allocation
2433 */
cfe89091
SF		 2434 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
2435 rc = -EOPNOTSUPP;
2436 free_xid(xid);
2437 return rc;
2438 }
30175628
SF		 2439
2440 /*
2441 * need to make sure we are not asked to extend the file since the SMB3
2442 * fsctl does not change the file size. In the future we could change
2443 * this to zero the first part of the range then set the file size
2444 * which for a non sparse file would zero the newly extended range
2445 */
2446 if (keep_size == false)
cfe89091
SF		 2447 if (i_size_read(inode) < offset + len) {
2448 rc = -EOPNOTSUPP;
2449 free_xid(xid);
2450 return rc;
2451 }
30175628
SF		 2452
2453 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2454
2455 fsctl_buf.FileOffset = cpu_to_le64(offset);
2456 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2457
2458 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2459 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 2460 true /* is_fctl */, (char *)&fsctl_buf,
30175628
SF		 2461 sizeof(struct file_zero_data_information), NULL, NULL);
2462 free_xid(xid);
2463 return rc;
2464}
2465
31742c5a
SF		 2466static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2467 loff_t offset, loff_t len)
2468{
2469 struct inode *inode;
2470 struct cifsInodeInfo *cifsi;
2471 struct cifsFileInfo *cfile = file->private_data;
2472 struct file_zero_data_information fsctl_buf;
2473 long rc;
2474 unsigned int xid;
2475 __u8 set_sparse = 1;
2476
2477 xid = get_xid();
2478
2b0143b5 2479 inode = d_inode(cfile->dentry);
31742c5a
SF		 2480 cifsi = CIFS_I(inode);
2481
2482 /* Need to make file sparse, if not already, before freeing range. */
2483 /* Consider adding equivalent for compressed since it could also work */
cfe89091
SF		 2484 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2485 rc = -EOPNOTSUPP;
2486 free_xid(xid);
2487 return rc;
2488 }
31742c5a
SF		 2489
2490 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2491
2492 fsctl_buf.FileOffset = cpu_to_le64(offset);
2493 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2494
2495 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2496 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 2497 true /* is_fctl */, (char *)&fsctl_buf,
31742c5a
SF		 2498 sizeof(struct file_zero_data_information), NULL, NULL);
2499 free_xid(xid);
2500 return rc;
2501}
2502
9ccf3216
SF		 2503static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2504 loff_t off, loff_t len, bool keep_size)
2505{
2506 struct inode *inode;
2507 struct cifsInodeInfo *cifsi;
2508 struct cifsFileInfo *cfile = file->private_data;
2509 long rc = -EOPNOTSUPP;
2510 unsigned int xid;
2511
2512 xid = get_xid();
2513
2b0143b5 2514 inode = d_inode(cfile->dentry);
9ccf3216
SF		 2515 cifsi = CIFS_I(inode);
2516
2517 /* if file not oplocked can't be sure whether asking to extend size */
2518 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 2519 if (keep_size == false) {
2520 free_xid(xid);
2521 return rc;
2522 }
9ccf3216
SF		 2523
2524 /*
2525 * Files are non-sparse by default so falloc may be a no-op
2526 * Must check if file sparse. If not sparse, and not extending
2527 * then no need to do anything since file already allocated
2528 */
2529 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2530 if (keep_size == true)
cfe89091 2531 rc = 0;
9ccf3216
SF		 2532 /* check if extending file */
2533 else if (i_size_read(inode) >= off + len)
2534 /* not extending file and already not sparse */
cfe89091 2535 rc = 0;
9ccf3216
SF		 2536 /* BB: in future add else clause to extend file */
2537 else
cfe89091
SF		 2538 rc = -EOPNOTSUPP;
2539 free_xid(xid);
2540 return rc;
9ccf3216
SF		 2541 }
2542
2543 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2544 /*
2545 * Check if falloc starts within first few pages of file
2546 * and ends within a few pages of the end of file to
2547 * ensure that most of file is being forced to be
2548 * fallocated now. If so then setting whole file sparse
2549 * ie potentially making a few extra pages at the beginning
2550 * or end of the file non-sparse via set_sparse is harmless.
2551 */
cfe89091
SF		 2552 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2553 rc = -EOPNOTSUPP;
2554 free_xid(xid);
2555 return rc;
2556 }
9ccf3216
SF		 2557
2558 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
2559 }
2560 /* BB: else ... in future add code to extend file and set sparse */
2561
2562
2563 free_xid(xid);
2564 return rc;
2565}
2566
2567
31742c5a
SF		 2568static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2569 loff_t off, loff_t len)
2570{
2571 /* KEEP_SIZE already checked for by do_fallocate */
2572 if (mode & FALLOC_FL_PUNCH_HOLE)
2573 return smb3_punch_hole(file, tcon, off, len);
30175628
SF		 2574 else if (mode & FALLOC_FL_ZERO_RANGE) {
2575 if (mode & FALLOC_FL_KEEP_SIZE)
2576 return smb3_zero_range(file, tcon, off, len, true);
2577 return smb3_zero_range(file, tcon, off, len, false);
9ccf3216
SF		 2578 } else if (mode == FALLOC_FL_KEEP_SIZE)
2579 return smb3_simple_falloc(file, tcon, off, len, true);
2580 else if (mode == 0)
2581 return smb3_simple_falloc(file, tcon, off, len, false);
31742c5a
SF		 2582
2583 return -EOPNOTSUPP;
2584}
2585
c11f1df5
SP		 2586static void
2587smb2_downgrade_oplock(struct TCP_Server_Info *server,
2588 struct cifsInodeInfo *cinode, bool set_level2)
2589{
2590 if (set_level2)
2591 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2592 0, NULL);
2593 else
2594 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2595}
2596
53ef1016 2597static void
42873b0a
PS		 2598smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2599 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2600{
2601 oplock &= 0xFF;
2602 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2603 return;
2604 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
42873b0a 2605 cinode->oplock = CIFS_CACHE_RHW_FLG;
53ef1016
PS		 2606 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2607 &cinode->vfs_inode);
2608 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
42873b0a 2609 cinode->oplock = CIFS_CACHE_RW_FLG;
53ef1016
PS		 2610 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2611 &cinode->vfs_inode);
2612 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2613 cinode->oplock = CIFS_CACHE_READ_FLG;
2614 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2615 &cinode->vfs_inode);
2616 } else
2617 cinode->oplock = 0;
2618}
2619
2620static void
42873b0a
PS		 2621smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2622 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2623{
2624 char message[5] = {0};
2625
2626 oplock &= 0xFF;
2627 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2628 return;
2629
2630 cinode->oplock = 0;
2631 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2632 cinode->oplock |= CIFS_CACHE_READ_FLG;
2633 strcat(message, "R");
2634 }
2635 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2636 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2637 strcat(message, "H");
2638 }
2639 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2640 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2641 strcat(message, "W");
2642 }
2643 if (!cinode->oplock)
2644 strcat(message, "None");
2645 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2646 &cinode->vfs_inode);
2647}
2648
42873b0a
PS		 2649static void
2650smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2651 unsigned int epoch, bool *purge_cache)
2652{
2653 unsigned int old_oplock = cinode->oplock;
2654
2655 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2656
2657 if (purge_cache) {
2658 *purge_cache = false;
2659 if (old_oplock == CIFS_CACHE_READ_FLG) {
2660 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2661 (epoch - cinode->epoch > 0))
2662 *purge_cache = true;
2663 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2664 (epoch - cinode->epoch > 1))
2665 *purge_cache = true;
2666 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2667 (epoch - cinode->epoch > 1))
2668 *purge_cache = true;
2669 else if (cinode->oplock == 0 &&
2670 (epoch - cinode->epoch > 0))
2671 *purge_cache = true;
2672 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2673 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2674 (epoch - cinode->epoch > 0))
2675 *purge_cache = true;
2676 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2677 (epoch - cinode->epoch > 1))
2678 *purge_cache = true;
2679 }
2680 cinode->epoch = epoch;
2681 }
2682}
2683
53ef1016
PS		 2684static bool
2685smb2_is_read_op(__u32 oplock)
2686{
2687 return oplock == SMB2_OPLOCK_LEVEL_II;
2688}
2689
2690static bool
2691smb21_is_read_op(__u32 oplock)
2692{
2693 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2694 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2695}
2696
f047390a
PS		 2697static __le32
2698map_oplock_to_lease(u8 oplock)
2699{
2700 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2701 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2702 else if (oplock == SMB2_OPLOCK_LEVEL_II)
2703 return SMB2_LEASE_READ_CACHING;
2704 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
2705 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
2706 SMB2_LEASE_WRITE_CACHING;
2707 return 0;
2708}
2709
a41a28bd
PS		 2710static char *
2711smb2_create_lease_buf(u8 *lease_key, u8 oplock)
2712{
2713 struct create_lease *buf;
2714
2715 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
2716 if (!buf)
2717 return NULL;
2718
729c0c9d 2719 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a 2720 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
a41a28bd
PS		 2721
2722 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2723 (struct create_lease, lcontext));
2724 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
2725 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2726 (struct create_lease, Name));
2727 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 2728 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
a41a28bd
PS		 2729 buf->Name[0] = 'R';
2730 buf->Name[1] = 'q';
2731 buf->Name[2] = 'L';
2732 buf->Name[3] = 's';
2733 return (char *)buf;
2734}
2735
f047390a
PS		 2736static char *
2737smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2738{
2739 struct create_lease_v2 *buf;
2740
2741 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2742 if (!buf)
2743 return NULL;
2744
729c0c9d 2745 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 2746 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2747
2748 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2749 (struct create_lease_v2, lcontext));
2750 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2751 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2752 (struct create_lease_v2, Name));
2753 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 2754 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
f047390a
PS		 2755 buf->Name[0] = 'R';
2756 buf->Name[1] = 'q';
2757 buf->Name[2] = 'L';
2758 buf->Name[3] = 's';
2759 return (char *)buf;
2760}
2761
b5c7cde3 2762static __u8
96164ab2 2763smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
b5c7cde3
PS		 2764{
2765 struct create_lease *lc = (struct create_lease *)buf;
2766
42873b0a 2767 *epoch = 0; /* not used */
b5c7cde3
PS		 2768 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2769 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2770 return le32_to_cpu(lc->lcontext.LeaseState);
2771}
2772
f047390a 2773static __u8
96164ab2 2774smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
f047390a
PS		 2775{
2776 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2777
42873b0a 2778 *epoch = le16_to_cpu(lc->lcontext.Epoch);
f047390a
PS		 2779 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2780 return SMB2_OPLOCK_LEVEL_NOCHANGE;
96164ab2 2781 if (lease_key)
729c0c9d 2782 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 2783 return le32_to_cpu(lc->lcontext.LeaseState);
2784}
2785
7f6c5008
PS		 2786static unsigned int
2787smb2_wp_retry_size(struct inode *inode)
2788{
2789 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2790 SMB2_MAX_BUFFER_SIZE);
2791}
2792
52755808
PS		 2793static bool
2794smb2_dir_needs_close(struct cifsFileInfo *cfile)
2795{
2796 return !cfile->invalidHandle;
2797}
2798
026e93dc 2799static void
977b6170
RS		 2800fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2801 struct smb_rqst *old_rq)
026e93dc
PS		 2802{
2803 struct smb2_sync_hdr *shdr =
c713c877 2804 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
026e93dc
PS		 2805
2806 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2807 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2808 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2809 tr_hdr->Flags = cpu_to_le16(0x01);
2810 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2811 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
026e93dc
PS		 2812}
2813
262916bc
RS		 2814/* We can not use the normal sg_set_buf() as we will sometimes pass a
2815 * stack object as buf.
2816 */
2817static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2818 unsigned int buflen)
2819{
2820 sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2821}
2822
b2c96de7
RS		 2823/* Assumes the first rqst has a transform header as the first iov.
2824 * I.e.
2825 * rqst[0].rq_iov[0] is transform header
2826 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
2827 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
977b6170 2828 */
026e93dc 2829static struct scatterlist *
b2c96de7 2830init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
026e93dc 2831{
b2c96de7 2832 unsigned int sg_len;
026e93dc
PS		 2833 struct scatterlist *sg;
2834 unsigned int i;
2835 unsigned int j;
b2c96de7
RS		 2836 unsigned int idx = 0;
2837 int skip;
2838
2839 sg_len = 1;
2840 for (i = 0; i < num_rqst; i++)
2841 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
026e93dc
PS		 2842
2843 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2844 if (!sg)
2845 return NULL;
2846
2847 sg_init_table(sg, sg_len);
b2c96de7
RS		 2848 for (i = 0; i < num_rqst; i++) {
2849 for (j = 0; j < rqst[i].rq_nvec; j++) {
2850 /*
2851 * The first rqst has a transform header where the
2852 * first 20 bytes are not part of the encrypted blob
2853 */
2854 skip = (i == 0) && (j == 0) ? 20 : 0;
2855 smb2_sg_set_buf(&sg[idx++],
2856 rqst[i].rq_iov[j].iov_base + skip,
2857 rqst[i].rq_iov[j].iov_len - skip);
e77fe73c 2858 }
b2c96de7
RS		 2859
2860 for (j = 0; j < rqst[i].rq_npages; j++) {
2861 unsigned int len, offset;
d5f07fb3 2862
b2c96de7
RS		 2863 rqst_page_get_length(&rqst[i], j, &len, &offset);
2864 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
2865 }
026e93dc 2866 }
b2c96de7 2867 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
026e93dc
PS		 2868 return sg;
2869}
2870
61cfac6f
PS		 2871static int
2872smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2873{
2874 struct cifs_ses *ses;
2875 u8 *ses_enc_key;
2876
2877 spin_lock(&cifs_tcp_ses_lock);
2878 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2879 if (ses->Suid != ses_id)
2880 continue;
2881 ses_enc_key = enc ? ses->smb3encryptionkey :
2882 ses->smb3decryptionkey;
2883 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2884 spin_unlock(&cifs_tcp_ses_lock);
2885 return 0;
2886 }
2887 spin_unlock(&cifs_tcp_ses_lock);
2888
2889 return 1;
2890}
026e93dc 2891/*
c713c877
RS		 2892 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
2893 * iov[0] - transform header (associate data),
2894 * iov[1-N] - SMB2 header and pages - data to encrypt.
2895 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
026e93dc
PS		 2896 * untouched.
2897 */
2898static int
b2c96de7
RS		 2899crypt_message(struct TCP_Server_Info *server, int num_rqst,
2900 struct smb_rqst *rqst, int enc)
026e93dc
PS		 2901{
2902 struct smb2_transform_hdr *tr_hdr =
b2c96de7 2903 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
1fc6ad2f 2904 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
026e93dc
PS		 2905 int rc = 0;
2906 struct scatterlist *sg;
2907 u8 sign[SMB2_SIGNATURE_SIZE] = {};
61cfac6f 2908 u8 key[SMB3_SIGN_KEY_SIZE];
026e93dc
PS		 2909 struct aead_request *req;
2910 char *iv;
2911 unsigned int iv_len;
a5186b85 2912 DECLARE_CRYPTO_WAIT(wait);
026e93dc
PS		 2913 struct crypto_aead *tfm;
2914 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2915
61cfac6f
PS		 2916 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2917 if (rc) {
2918 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2919 enc ? "en" : "de");
026e93dc
PS		 2920 return 0;
2921 }
2922
2923 rc = smb3_crypto_aead_allocate(server);
2924 if (rc) {
2925 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2926 return rc;
2927 }
2928
2929 tfm = enc ? server->secmech.ccmaesencrypt :
2930 server->secmech.ccmaesdecrypt;
61cfac6f 2931 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
026e93dc
PS		 2932 if (rc) {
2933 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2934 return rc;
2935 }
2936
2937 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2938 if (rc) {
2939 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2940 return rc;
2941 }
2942
2943 req = aead_request_alloc(tfm, GFP_KERNEL);
2944 if (!req) {
2945 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2946 return -ENOMEM;
2947 }
2948
2949 if (!enc) {
2950 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2951 crypt_len += SMB2_SIGNATURE_SIZE;
2952 }
2953
b2c96de7 2954 sg = init_sg(num_rqst, rqst, sign);
026e93dc 2955 if (!sg) {
517a6e43
CJ		 2956 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2957 rc = -ENOMEM;
026e93dc
PS		 2958 goto free_req;
2959 }
2960
2961 iv_len = crypto_aead_ivsize(tfm);
2962 iv = kzalloc(iv_len, GFP_KERNEL);
2963 if (!iv) {
2964 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
517a6e43 2965 rc = -ENOMEM;
026e93dc
PS		 2966 goto free_sg;
2967 }
2968 iv[0] = 3;
2969 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2970
2971 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2972 aead_request_set_ad(req, assoc_data_len);
2973
2974 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
a5186b85 2975 crypto_req_done, &wait);
026e93dc 2976
a5186b85
GBY		 2977 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2978 : crypto_aead_decrypt(req), &wait);
026e93dc
PS		 2979
2980 if (!rc && enc)
2981 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2982
2983 kfree(iv);
2984free_sg:
2985 kfree(sg);
2986free_req:
2987 kfree(req);
2988 return rc;
2989}
2990
b2c96de7
RS		 2991void
2992smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
2993{
2994 int i, j;
2995
2996 for (i = 0; i < num_rqst; i++) {
2997 if (rqst[i].rq_pages) {
2998 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
2999 put_page(rqst[i].rq_pages[j]);
3000 kfree(rqst[i].rq_pages);
3001 }
3002 }
3003}
3004
3005/*
3006 * This function will initialize new_rq and encrypt the content.
3007 * The first entry, new_rq[0], only contains a single iov which contains
3008 * a smb2_transform_hdr and is pre-allocated by the caller.
3009 * This function then populates new_rq[1+] with the content from olq_rq[0+].
3010 *
3011 * The end result is an array of smb_rqst structures where the first structure
3012 * only contains a single iov for the transform header which we then can pass
3013 * to crypt_message().
3014 *
3015 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
3016 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3017 */
026e93dc 3018static int
b2c96de7
RS		 3019smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3020 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
026e93dc 3021{
026e93dc 3022 struct page **pages;
b2c96de7
RS		 3023 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3024 unsigned int npages;
3025 unsigned int orig_len = 0;
3026 int i, j;
026e93dc
PS		 3027 int rc = -ENOMEM;
3028
b2c96de7
RS		 3029 for (i = 1; i < num_rqst; i++) {
3030 npages = old_rq[i - 1].rq_npages;
3031 pages = kmalloc_array(npages, sizeof(struct page *),
3032 GFP_KERNEL);
3033 if (!pages)
3034 goto err_free;
3035
3036 new_rq[i].rq_pages = pages;
3037 new_rq[i].rq_npages = npages;
3038 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3039 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3040 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3041 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3042 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3043
3044 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3045
3046 for (j = 0; j < npages; j++) {
3047 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3048 if (!pages[j])
3049 goto err_free;
3050 }
026e93dc 3051
b2c96de7
RS		 3052 /* copy pages form the old */
3053 for (j = 0; j < npages; j++) {
3054 char *dst, *src;
3055 unsigned int offset, len;
977b6170 3056
b2c96de7 3057 rqst_page_get_length(&new_rq[i], j, &len, &offset);
026e93dc 3058
b2c96de7
RS		 3059 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3060 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
026e93dc 3061
b2c96de7
RS		 3062 memcpy(dst, src, len);
3063 kunmap(new_rq[i].rq_pages[j]);
3064 kunmap(old_rq[i - 1].rq_pages[j]);
3065 }
3066 }
35e2cc1b 3067
b2c96de7 3068 /* fill the 1st iov with a transform header */
977b6170 3069 fill_transform_hdr(tr_hdr, orig_len, old_rq);
d5f07fb3 3070
b2c96de7 3071 rc = crypt_message(server, num_rqst, new_rq, 1);
026e93dc
PS		 3072 cifs_dbg(FYI, "encrypt message returned %d", rc);
3073 if (rc)
b2c96de7 3074 goto err_free;
026e93dc
PS		 3075
3076 return rc;
3077
b2c96de7
RS		 3078err_free:
3079 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
026e93dc
PS		 3080 return rc;
3081}
3082
4326ed2f
PS		 3083static int
3084smb3_is_transform_hdr(void *buf)
3085{
3086 struct smb2_transform_hdr *trhdr = buf;
3087
3088 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3089}
3090
3091static int
3092decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3093 unsigned int buf_data_size, struct page **pages,
3094 unsigned int npages, unsigned int page_data_size)
3095{
c713c877 3096 struct kvec iov[2];
4326ed2f 3097 struct smb_rqst rqst = {NULL};
4326ed2f
PS		 3098 int rc;
3099
c713c877
RS		 3100 iov[0].iov_base = buf;
3101 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3102 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3103 iov[1].iov_len = buf_data_size;
4326ed2f
PS		 3104
3105 rqst.rq_iov = iov;
c713c877 3106 rqst.rq_nvec = 2;
4326ed2f
PS		 3107 rqst.rq_pages = pages;
3108 rqst.rq_npages = npages;
3109 rqst.rq_pagesz = PAGE_SIZE;
3110 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3111
b2c96de7 3112 rc = crypt_message(server, 1, &rqst, 0);
4326ed2f
PS		 3113 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
3114
3115 if (rc)
3116 return rc;
3117
c713c877 3118 memmove(buf, iov[1].iov_base, buf_data_size);
977b6170
RS		 3119
3120 server->total_read = buf_data_size + page_data_size;
4326ed2f
PS		 3121
3122 return rc;
3123}
3124
c42a6abe
PS		 3125static int
3126read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
3127 unsigned int npages, unsigned int len)
3128{
3129 int i;
3130 int length;
3131
3132 for (i = 0; i < npages; i++) {
3133 struct page *page = pages[i];
3134 size_t n;
3135
3136 n = len;
3137 if (len >= PAGE_SIZE) {
3138 /* enough data to fill the page */
3139 n = PAGE_SIZE;
3140 len -= n;
3141 } else {
3142 zero_user(page, len, PAGE_SIZE - len);
3143 len = 0;
3144 }
1dbe3466 3145 length = cifs_read_page_from_socket(server, page, 0, n);
c42a6abe
PS		 3146 if (length < 0)
3147 return length;
3148 server->total_read += length;
3149 }
3150
3151 return 0;
3152}
3153
3154static int
3155init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
3156 unsigned int cur_off, struct bio_vec **page_vec)
3157{
3158 struct bio_vec *bvec;
3159 int i;
3160
3161 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
3162 if (!bvec)
3163 return -ENOMEM;
3164
3165 for (i = 0; i < npages; i++) {
3166 bvec[i].bv_page = pages[i];
3167 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
3168 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
3169 data_size -= bvec[i].bv_len;
3170 }
3171
3172 if (data_size != 0) {
3173 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
3174 kfree(bvec);
3175 return -EIO;
3176 }
3177
3178 *page_vec = bvec;
3179 return 0;
3180}
3181
4326ed2f
PS		 3182static int
3183handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
3184 char *buf, unsigned int buf_len, struct page **pages,
3185 unsigned int npages, unsigned int page_data_size)
3186{
3187 unsigned int data_offset;
3188 unsigned int data_len;
c42a6abe
PS		 3189 unsigned int cur_off;
3190 unsigned int cur_page_idx;
3191 unsigned int pad_len;
4326ed2f 3192 struct cifs_readdata *rdata = mid->callback_data;
49f466bd 3193 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4326ed2f
PS		 3194 struct bio_vec *bvec = NULL;
3195 struct iov_iter iter;
3196 struct kvec iov;
3197 int length;
74dcf418 3198 bool use_rdma_mr = false;
4326ed2f
PS		 3199
3200 if (shdr->Command != SMB2_READ) {
3201 cifs_dbg(VFS, "only big read responses are supported\n");
3202 return -ENOTSUPP;
3203 }
3204
511c54a2
PS		 3205 if (server->ops->is_session_expired &&
3206 server->ops->is_session_expired(buf)) {
3207 cifs_reconnect(server);
3208 wake_up(&server->response_q);
3209 return -1;
3210 }
3211
4326ed2f
PS		 3212 if (server->ops->is_status_pending &&
3213 server->ops->is_status_pending(buf, server, 0))
3214 return -1;
3215
ec678eae
PS		 3216 /* set up first two iov to get credits */
3217 rdata->iov[0].iov_base = buf;
3218 rdata->iov[0].iov_len = 4;
3219 rdata->iov[1].iov_base = buf + 4;
3220 rdata->iov[1].iov_len =
3221 min_t(unsigned int, buf_len, server->vals->read_rsp_size) - 4;
3222 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
3223 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
3224 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
3225 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
3226
3227 rdata->result = server->ops->map_error(buf, true);
4326ed2f
PS		 3228 if (rdata->result != 0) {
3229 cifs_dbg(FYI, "%s: server returned error %d\n",
3230 __func__, rdata->result);
ec678eae
PS		 3231 /* normal error on read response */
3232 dequeue_mid(mid, false);
4326ed2f
PS		 3233 return 0;
3234 }
3235
1fc6ad2f 3236 data_offset = server->ops->read_data_offset(buf);
74dcf418
LL		 3237#ifdef CONFIG_CIFS_SMB_DIRECT
3238 use_rdma_mr = rdata->mr;
3239#endif
3240 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4326ed2f
PS		 3241
3242 if (data_offset < server->vals->read_rsp_size) {
3243 /*
3244 * win2k8 sometimes sends an offset of 0 when the read
3245 * is beyond the EOF. Treat it as if the data starts just after
3246 * the header.
3247 */
3248 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
3249 __func__, data_offset);
3250 data_offset = server->vals->read_rsp_size;
3251 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
3252 /* data_offset is beyond the end of smallbuf */
3253 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
3254 __func__, data_offset);
3255 rdata->result = -EIO;
3256 dequeue_mid(mid, rdata->result);
3257 return 0;
3258 }
3259
c42a6abe
PS		 3260 pad_len = data_offset - server->vals->read_rsp_size;
3261
4326ed2f
PS		 3262 if (buf_len <= data_offset) {
3263 /* read response payload is in pages */
c42a6abe
PS		 3264 cur_page_idx = pad_len / PAGE_SIZE;
3265 cur_off = pad_len % PAGE_SIZE;
3266
3267 if (cur_page_idx != 0) {
3268 /* data offset is beyond the 1st page of response */
3269 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
3270 __func__, data_offset);
3271 rdata->result = -EIO;
3272 dequeue_mid(mid, rdata->result);
3273 return 0;
3274 }
3275
3276 if (data_len > page_data_size - pad_len) {
3277 /* data_len is corrupt -- discard frame */
3278 rdata->result = -EIO;
3279 dequeue_mid(mid, rdata->result);
3280 return 0;
3281 }
3282
3283 rdata->result = init_read_bvec(pages, npages, page_data_size,
3284 cur_off, &bvec);
3285 if (rdata->result != 0) {
3286 dequeue_mid(mid, rdata->result);
3287 return 0;
3288 }
3289
aa563d7b 3290 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4326ed2f
PS		 3291 } else if (buf_len >= data_offset + data_len) {
3292 /* read response payload is in buf */
3293 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
3294 iov.iov_base = buf + data_offset;
3295 iov.iov_len = data_len;
aa563d7b 3296 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4326ed2f
PS		 3297 } else {
3298 /* read response payload cannot be in both buf and pages */
3299 WARN_ONCE(1, "buf can not contain only a part of read data");
3300 rdata->result = -EIO;
3301 dequeue_mid(mid, rdata->result);
3302 return 0;
3303 }
3304
4326ed2f
PS		 3305 length = rdata->copy_into_pages(server, rdata, &iter);
3306
3307 kfree(bvec);
3308
3309 if (length < 0)
3310 return length;
3311
3312 dequeue_mid(mid, false);
3313 return length;
3314}
3315
c42a6abe
PS		 3316static int
3317receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
3318{
3319 char *buf = server->smallbuf;
3320 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3321 unsigned int npages;
3322 struct page **pages;
3323 unsigned int len;
1fc6ad2f 3324 unsigned int buflen = server->pdu_size;
c42a6abe
PS		 3325 int rc;
3326 int i = 0;
3327
1fc6ad2f 3328 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
c42a6abe
PS		 3329 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
3330
3331 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
3332 if (rc < 0)
3333 return rc;
3334 server->total_read += rc;
3335
1fc6ad2f 3336 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
93012bf9 3337 server->vals->read_rsp_size;
c42a6abe
PS		 3338 npages = DIV_ROUND_UP(len, PAGE_SIZE);
3339
3340 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
3341 if (!pages) {
3342 rc = -ENOMEM;
3343 goto discard_data;
3344 }
3345
3346 for (; i < npages; i++) {
3347 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3348 if (!pages[i]) {
3349 rc = -ENOMEM;
3350 goto discard_data;
3351 }
3352 }
3353
3354 /* read read data into pages */
3355 rc = read_data_into_pages(server, pages, npages, len);
3356 if (rc)
3357 goto free_pages;
3358
350be257 3359 rc = cifs_discard_remaining_data(server);
c42a6abe
PS		 3360 if (rc)
3361 goto free_pages;
3362
1fc6ad2f 3363 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
c42a6abe
PS		 3364 pages, npages, len);
3365 if (rc)
3366 goto free_pages;
3367
3368 *mid = smb2_find_mid(server, buf);
3369 if (*mid == NULL)
3370 cifs_dbg(FYI, "mid not found\n");
3371 else {
3372 cifs_dbg(FYI, "mid found\n");
3373 (*mid)->decrypted = true;
3374 rc = handle_read_data(server, *mid, buf,
3375 server->vals->read_rsp_size,
3376 pages, npages, len);
3377 }
3378
3379free_pages:
3380 for (i = i - 1; i >= 0; i--)
3381 put_page(pages[i]);
3382 kfree(pages);
3383 return rc;
3384discard_data:
350be257 3385 cifs_discard_remaining_data(server);
c42a6abe
PS		 3386 goto free_pages;
3387}
3388
4326ed2f
PS		 3389static int
3390receive_encrypted_standard(struct TCP_Server_Info *server,
b24df3e3
RS		 3391 struct mid_q_entry **mids, char **bufs,
3392 int *num_mids)
4326ed2f 3393{
b24df3e3 3394 int ret, length;
4326ed2f 3395 char *buf = server->smallbuf;
b24df3e3
RS		 3396 char *tmpbuf;
3397 struct smb2_sync_hdr *shdr;
2e96467d 3398 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 3399 unsigned int buf_size;
3400 struct mid_q_entry *mid_entry;
b24df3e3
RS		 3401 int next_is_large;
3402 char *next_buffer = NULL;
3403
3404 *num_mids = 0;
4326ed2f
PS		 3405
3406 /* switch to large buffer if too big for a small one */
1fc6ad2f 3407 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4326ed2f
PS		 3408 server->large_buf = true;
3409 memcpy(server->bigbuf, buf, server->total_read);
3410 buf = server->bigbuf;
3411 }
3412
3413 /* now read the rest */
3414 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
1fc6ad2f 3415 pdu_length - HEADER_SIZE(server) + 1);
4326ed2f
PS		 3416 if (length < 0)
3417 return length;
3418 server->total_read += length;
3419
1fc6ad2f 3420 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4326ed2f
PS		 3421 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
3422 if (length)
3423 return length;
3424
b24df3e3
RS		 3425 next_is_large = server->large_buf;
3426 one_more:
3427 shdr = (struct smb2_sync_hdr *)buf;
3428 if (shdr->NextCommand) {
3429 if (next_is_large) {
3430 tmpbuf = server->bigbuf;
3431 next_buffer = (char *)cifs_buf_get();
3432 } else {
3433 tmpbuf = server->smallbuf;
3434 next_buffer = (char *)cifs_small_buf_get();
3435 }
3436 memcpy(next_buffer,
3437 tmpbuf + le32_to_cpu(shdr->NextCommand),
3438 pdu_length - le32_to_cpu(shdr->NextCommand));
3439 }
3440
4326ed2f
PS		 3441 mid_entry = smb2_find_mid(server, buf);
3442 if (mid_entry == NULL)
3443 cifs_dbg(FYI, "mid not found\n");
3444 else {
3445 cifs_dbg(FYI, "mid found\n");
3446 mid_entry->decrypted = true;
b24df3e3 3447 mid_entry->resp_buf_size = server->pdu_size;
4326ed2f
PS		 3448 }
3449
b24df3e3
RS		 3450 if (*num_mids >= MAX_COMPOUND) {
3451 cifs_dbg(VFS, "too many PDUs in compound\n");
3452 return -1;
3453 }
3454 bufs[*num_mids] = buf;
3455 mids[(*num_mids)++] = mid_entry;
4326ed2f
PS		 3456
3457 if (mid_entry && mid_entry->handle)
b24df3e3
RS		 3458 ret = mid_entry->handle(server, mid_entry);
3459 else
3460 ret = cifs_handle_standard(server, mid_entry);
3461
3462 if (ret == 0 && shdr->NextCommand) {
3463 pdu_length -= le32_to_cpu(shdr->NextCommand);
3464 server->large_buf = next_is_large;
3465 if (next_is_large)
3466 server->bigbuf = next_buffer;
3467 else
3468 server->smallbuf = next_buffer;
3469
3470 buf += le32_to_cpu(shdr->NextCommand);
3471 goto one_more;
3472 }
4326ed2f 3473
b24df3e3 3474 return ret;
4326ed2f
PS		 3475}
3476
3477static int
b24df3e3
RS		 3478smb3_receive_transform(struct TCP_Server_Info *server,
3479 struct mid_q_entry **mids, char **bufs, int *num_mids)
4326ed2f
PS		 3480{
3481 char *buf = server->smallbuf;
2e96467d 3482 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 3483 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3484 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3485
1fc6ad2f 3486 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4326ed2f
PS		 3487 sizeof(struct smb2_sync_hdr)) {
3488 cifs_dbg(VFS, "Transform message is too small (%u)\n",
3489 pdu_length);
3490 cifs_reconnect(server);
3491 wake_up(&server->response_q);
3492 return -ECONNABORTED;
3493 }
3494
1fc6ad2f 3495 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4326ed2f
PS		 3496 cifs_dbg(VFS, "Transform message is broken\n");
3497 cifs_reconnect(server);
3498 wake_up(&server->response_q);
3499 return -ECONNABORTED;
3500 }
3501
b24df3e3 3502 /* TODO: add support for compounds containing READ. */
6d2f84ee
PA		 3503 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
3504 *num_mids = 1;
b24df3e3 3505 return receive_encrypted_read(server, &mids[0]);
6d2f84ee 3506 }
4326ed2f 3507
b24df3e3 3508 return receive_encrypted_standard(server, mids, bufs, num_mids);
4326ed2f
PS		 3509}
3510
3511int
3512smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
3513{
3514 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
3515
1fc6ad2f 3516 return handle_read_data(server, mid, buf, server->pdu_size,
4326ed2f
PS		 3517 NULL, 0, 0);
3518}
3519
8ce79ec3
RS		 3520static int
3521smb2_next_header(char *buf)
3522{
3523 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
3524 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
3525
3526 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
3527 return sizeof(struct smb2_transform_hdr) +
3528 le32_to_cpu(t_hdr->OriginalMessageSize);
3529
3530 return le32_to_cpu(hdr->NextCommand);
3531}
3532
53ef1016 3533struct smb_version_operations smb20_operations = {
027e8eec 3534 .compare_fids = smb2_compare_fids,
2dc7e1c0 3535 .setup_request = smb2_setup_request,
c95b8eed 3536 .setup_async_request = smb2_setup_async_request,
2dc7e1c0 3537 .check_receive = smb2_check_receive,
28ea5290
PS		 3538 .add_credits = smb2_add_credits,
3539 .set_credits = smb2_set_credits,
3540 .get_credits_field = smb2_get_credits_field,
3541 .get_credits = smb2_get_credits,
cb7e9eab 3542 .wait_mtu_credits = cifs_wait_mtu_credits,
2dc7e1c0 3543 .get_next_mid = smb2_get_next_mid,
09a4707e
PS		 3544 .read_data_offset = smb2_read_data_offset,
3545 .read_data_length = smb2_read_data_length,
3546 .map_error = map_smb2_to_linux_error,
093b2bda
PS		 3547 .find_mid = smb2_find_mid,
3548 .check_message = smb2_check_message,
3549 .dump_detail = smb2_dump_detail,
d60622eb
PS		 3550 .clear_stats = smb2_clear_stats,
3551 .print_stats = smb2_print_stats,
983c88a4 3552 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3553 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3554 .downgrade_oplock = smb2_downgrade_oplock,
ec2e4523
PS		 3555 .need_neg = smb2_need_neg,
3556 .negotiate = smb2_negotiate,
3a3bab50
PS		 3557 .negotiate_wsize = smb2_negotiate_wsize,
3558 .negotiate_rsize = smb2_negotiate_rsize,
5478f9ba
PS		 3559 .sess_setup = SMB2_sess_setup,
3560 .logoff = SMB2_logoff,
faaf946a
PS		 3561 .tree_connect = SMB2_tcon,
3562 .tree_disconnect = SMB2_tdis,
34f62640 3563 .qfs_tcon = smb2_qfs_tcon,
2503a0db 3564 .is_path_accessible = smb2_is_path_accessible,
9094fad1
PS		 3565 .can_echo = smb2_can_echo,
3566 .echo = SMB2_echo,
be4cb9e3
PS		 3567 .query_path_info = smb2_query_path_info,
3568 .get_srv_inum = smb2_get_srv_inum,
b7546bc5 3569 .query_file_info = smb2_query_file_info,
c839ff24
PS		 3570 .set_path_size = smb2_set_path_size,
3571 .set_file_size = smb2_set_file_size,
1feeaac7 3572 .set_file_info = smb2_set_file_info,
64a5cfa6 3573 .set_compression = smb2_set_compression,
a0e73183
PS		 3574 .mkdir = smb2_mkdir,
3575 .mkdir_setinfo = smb2_mkdir_setinfo,
1a500f01 3576 .rmdir = smb2_rmdir,
cbe6f439 3577 .unlink = smb2_unlink,
35143eb5 3578 .rename = smb2_rename_path,
568798cc 3579 .create_hardlink = smb2_create_hardlink,
b42bf888 3580 .query_symlink = smb2_query_symlink,
5b23c97d
SP		 3581 .query_mf_symlink = smb3_query_mf_symlink,
3582 .create_mf_symlink = smb3_create_mf_symlink,
f0df737e
PS		 3583 .open = smb2_open_file,
3584 .set_fid = smb2_set_fid,
3585 .close = smb2_close_file,
7a5cfb19 3586 .flush = smb2_flush_file,
09a4707e 3587 .async_readv = smb2_async_readv,
33319141 3588 .async_writev = smb2_async_writev,
d8e05039 3589 .sync_read = smb2_sync_read,
009d3443 3590 .sync_write = smb2_sync_write,
d324f08d
PS		 3591 .query_dir_first = smb2_query_dir_first,
3592 .query_dir_next = smb2_query_dir_next,
3593 .close_dir = smb2_close_dir,
3594 .calc_smb_size = smb2_calc_size,
2e44b288 3595 .is_status_pending = smb2_is_status_pending,
511c54a2 3596 .is_session_expired = smb2_is_session_expired,
983c88a4 3597 .oplock_response = smb2_oplock_response,
6fc05c25 3598 .queryfs = smb2_queryfs,
f7ba7fe6
PS		 3599 .mand_lock = smb2_mand_lock,
3600 .mand_unlock_range = smb2_unlock_range,
b140799a 3601 .push_mand_locks = smb2_push_mandatory_locks,
b8c32dbb
PS		 3602 .get_lease_key = smb2_get_lease_key,
3603 .set_lease_key = smb2_set_lease_key,
3604 .new_lease_key = smb2_new_lease_key,
38107d45 3605 .calc_signature = smb2_calc_signature,
53ef1016
PS		 3606 .is_read_op = smb2_is_read_op,
3607 .set_oplock_level = smb2_set_oplock_level,
a41a28bd 3608 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 3609 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 3610 .copychunk_range = smb2_copychunk_range,
7f6c5008 3611 .wp_retry_size = smb2_wp_retry_size,
52755808 3612 .dir_needs_close = smb2_dir_needs_close,
9d49640a 3613 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3614 .select_sectype = smb2_select_sectype,
95907fea
RS		 3615#ifdef CONFIG_CIFS_XATTR
3616 .query_all_EAs = smb2_query_eas,
5517554e 3617 .set_EA = smb2_set_ea,
95907fea 3618#endif /* CIFS_XATTR */
2f1afe25
SP		 3619#ifdef CONFIG_CIFS_ACL
3620 .get_acl = get_smb2_acl,
3621 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3622 .set_acl = set_smb2_acl,
2f1afe25 3623#endif /* CIFS_ACL */
8ce79ec3 3624 .next_header = smb2_next_header,
f5b05d62 3625 .ioctl_query_info = smb2_ioctl_query_info,
38107d45
SF		 3626};
3627
53ef1016
PS		 3628struct smb_version_operations smb21_operations = {
3629 .compare_fids = smb2_compare_fids,
3630 .setup_request = smb2_setup_request,
3631 .setup_async_request = smb2_setup_async_request,
3632 .check_receive = smb2_check_receive,
3633 .add_credits = smb2_add_credits,
3634 .set_credits = smb2_set_credits,
3635 .get_credits_field = smb2_get_credits_field,
3636 .get_credits = smb2_get_credits,
cb7e9eab 3637 .wait_mtu_credits = smb2_wait_mtu_credits,
53ef1016
PS		 3638 .get_next_mid = smb2_get_next_mid,
3639 .read_data_offset = smb2_read_data_offset,
3640 .read_data_length = smb2_read_data_length,
3641 .map_error = map_smb2_to_linux_error,
3642 .find_mid = smb2_find_mid,
3643 .check_message = smb2_check_message,
3644 .dump_detail = smb2_dump_detail,
3645 .clear_stats = smb2_clear_stats,
3646 .print_stats = smb2_print_stats,
3647 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3648 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3649 .downgrade_oplock = smb2_downgrade_oplock,
53ef1016
PS		 3650 .need_neg = smb2_need_neg,
3651 .negotiate = smb2_negotiate,
3652 .negotiate_wsize = smb2_negotiate_wsize,
3653 .negotiate_rsize = smb2_negotiate_rsize,
3654 .sess_setup = SMB2_sess_setup,
3655 .logoff = SMB2_logoff,
3656 .tree_connect = SMB2_tcon,
3657 .tree_disconnect = SMB2_tdis,
34f62640 3658 .qfs_tcon = smb2_qfs_tcon,
53ef1016
PS		 3659 .is_path_accessible = smb2_is_path_accessible,
3660 .can_echo = smb2_can_echo,
3661 .echo = SMB2_echo,
3662 .query_path_info = smb2_query_path_info,
3663 .get_srv_inum = smb2_get_srv_inum,
3664 .query_file_info = smb2_query_file_info,
3665 .set_path_size = smb2_set_path_size,
3666 .set_file_size = smb2_set_file_size,
3667 .set_file_info = smb2_set_file_info,
64a5cfa6 3668 .set_compression = smb2_set_compression,
53ef1016
PS		 3669 .mkdir = smb2_mkdir,
3670 .mkdir_setinfo = smb2_mkdir_setinfo,
3671 .rmdir = smb2_rmdir,
3672 .unlink = smb2_unlink,
3673 .rename = smb2_rename_path,
3674 .create_hardlink = smb2_create_hardlink,
3675 .query_symlink = smb2_query_symlink,
c22870ea 3676 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 3677 .create_mf_symlink = smb3_create_mf_symlink,
53ef1016
PS		 3678 .open = smb2_open_file,
3679 .set_fid = smb2_set_fid,
3680 .close = smb2_close_file,
3681 .flush = smb2_flush_file,
3682 .async_readv = smb2_async_readv,
3683 .async_writev = smb2_async_writev,
3684 .sync_read = smb2_sync_read,
3685 .sync_write = smb2_sync_write,
3686 .query_dir_first = smb2_query_dir_first,
3687 .query_dir_next = smb2_query_dir_next,
3688 .close_dir = smb2_close_dir,
3689 .calc_smb_size = smb2_calc_size,
3690 .is_status_pending = smb2_is_status_pending,
511c54a2 3691 .is_session_expired = smb2_is_session_expired,
53ef1016
PS		 3692 .oplock_response = smb2_oplock_response,
3693 .queryfs = smb2_queryfs,
3694 .mand_lock = smb2_mand_lock,
3695 .mand_unlock_range = smb2_unlock_range,
3696 .push_mand_locks = smb2_push_mandatory_locks,
3697 .get_lease_key = smb2_get_lease_key,
3698 .set_lease_key = smb2_set_lease_key,
3699 .new_lease_key = smb2_new_lease_key,
3700 .calc_signature = smb2_calc_signature,
3701 .is_read_op = smb21_is_read_op,
3702 .set_oplock_level = smb21_set_oplock_level,
a41a28bd 3703 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 3704 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 3705 .copychunk_range = smb2_copychunk_range,
7f6c5008 3706 .wp_retry_size = smb2_wp_retry_size,
52755808 3707 .dir_needs_close = smb2_dir_needs_close,
834170c8 3708 .enum_snapshots = smb3_enum_snapshots,
9d49640a 3709 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3710 .select_sectype = smb2_select_sectype,
95907fea
RS		 3711#ifdef CONFIG_CIFS_XATTR
3712 .query_all_EAs = smb2_query_eas,
5517554e 3713 .set_EA = smb2_set_ea,
95907fea 3714#endif /* CIFS_XATTR */
2f1afe25
SP		 3715#ifdef CONFIG_CIFS_ACL
3716 .get_acl = get_smb2_acl,
3717 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3718 .set_acl = set_smb2_acl,
2f1afe25 3719#endif /* CIFS_ACL */
8ce79ec3 3720 .next_header = smb2_next_header,
f5b05d62 3721 .ioctl_query_info = smb2_ioctl_query_info,
53ef1016 3722};
38107d45
SF		 3723
3724struct smb_version_operations smb30_operations = {
3725 .compare_fids = smb2_compare_fids,
3726 .setup_request = smb2_setup_request,
3727 .setup_async_request = smb2_setup_async_request,
3728 .check_receive = smb2_check_receive,
3729 .add_credits = smb2_add_credits,
3730 .set_credits = smb2_set_credits,
3731 .get_credits_field = smb2_get_credits_field,
3732 .get_credits = smb2_get_credits,
cb7e9eab 3733 .wait_mtu_credits = smb2_wait_mtu_credits,
38107d45
SF		 3734 .get_next_mid = smb2_get_next_mid,
3735 .read_data_offset = smb2_read_data_offset,
3736 .read_data_length = smb2_read_data_length,
3737 .map_error = map_smb2_to_linux_error,
3738 .find_mid = smb2_find_mid,
3739 .check_message = smb2_check_message,
3740 .dump_detail = smb2_dump_detail,
3741 .clear_stats = smb2_clear_stats,
3742 .print_stats = smb2_print_stats,
769ee6a4 3743 .dump_share_caps = smb2_dump_share_caps,
38107d45 3744 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3745 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3746 .downgrade_oplock = smb2_downgrade_oplock,
38107d45
SF		 3747 .need_neg = smb2_need_neg,
3748 .negotiate = smb2_negotiate,
3d621230
SF		 3749 .negotiate_wsize = smb3_negotiate_wsize,
3750 .negotiate_rsize = smb3_negotiate_rsize,
38107d45
SF		 3751 .sess_setup = SMB2_sess_setup,
3752 .logoff = SMB2_logoff,
3753 .tree_connect = SMB2_tcon,
3754 .tree_disconnect = SMB2_tdis,
af6a12ea 3755 .qfs_tcon = smb3_qfs_tcon,
38107d45
SF		 3756 .is_path_accessible = smb2_is_path_accessible,
3757 .can_echo = smb2_can_echo,
3758 .echo = SMB2_echo,
3759 .query_path_info = smb2_query_path_info,
3760 .get_srv_inum = smb2_get_srv_inum,
3761 .query_file_info = smb2_query_file_info,
3762 .set_path_size = smb2_set_path_size,
3763 .set_file_size = smb2_set_file_size,
3764 .set_file_info = smb2_set_file_info,
64a5cfa6 3765 .set_compression = smb2_set_compression,
38107d45
SF		 3766 .mkdir = smb2_mkdir,
3767 .mkdir_setinfo = smb2_mkdir_setinfo,
3768 .rmdir = smb2_rmdir,
3769 .unlink = smb2_unlink,
3770 .rename = smb2_rename_path,
3771 .create_hardlink = smb2_create_hardlink,
b42bf888 3772 .query_symlink = smb2_query_symlink,
c22870ea 3773 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 3774 .create_mf_symlink = smb3_create_mf_symlink,
38107d45
SF		 3775 .open = smb2_open_file,
3776 .set_fid = smb2_set_fid,
3777 .close = smb2_close_file,
3778 .flush = smb2_flush_file,
3779 .async_readv = smb2_async_readv,
3780 .async_writev = smb2_async_writev,
3781 .sync_read = smb2_sync_read,
3782 .sync_write = smb2_sync_write,
3783 .query_dir_first = smb2_query_dir_first,
3784 .query_dir_next = smb2_query_dir_next,
3785 .close_dir = smb2_close_dir,
3786 .calc_smb_size = smb2_calc_size,
3787 .is_status_pending = smb2_is_status_pending,
511c54a2 3788 .is_session_expired = smb2_is_session_expired,
38107d45
SF		 3789 .oplock_response = smb2_oplock_response,
3790 .queryfs = smb2_queryfs,
3791 .mand_lock = smb2_mand_lock,
3792 .mand_unlock_range = smb2_unlock_range,
3793 .push_mand_locks = smb2_push_mandatory_locks,
3794 .get_lease_key = smb2_get_lease_key,
3795 .set_lease_key = smb2_set_lease_key,
3796 .new_lease_key = smb2_new_lease_key,
373512ec 3797 .generate_signingkey = generate_smb30signingkey,
38107d45 3798 .calc_signature = smb3_calc_signature,
b3152e2c 3799 .set_integrity = smb3_set_integrity,
53ef1016 3800 .is_read_op = smb21_is_read_op,
42873b0a 3801 .set_oplock_level = smb3_set_oplock_level,
f047390a
PS		 3802 .create_lease_buf = smb3_create_lease_buf,
3803 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 3804 .copychunk_range = smb2_copychunk_range,
ca9e7a1c 3805 .duplicate_extents = smb2_duplicate_extents,
ff1c038a 3806 .validate_negotiate = smb3_validate_negotiate,
7f6c5008 3807 .wp_retry_size = smb2_wp_retry_size,
52755808 3808 .dir_needs_close = smb2_dir_needs_close,
31742c5a 3809 .fallocate = smb3_fallocate,
834170c8 3810 .enum_snapshots = smb3_enum_snapshots,
026e93dc 3811 .init_transform_rq = smb3_init_transform_rq,
4326ed2f
PS		 3812 .is_transform_hdr = smb3_is_transform_hdr,
3813 .receive_transform = smb3_receive_transform,
9d49640a 3814 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3815 .select_sectype = smb2_select_sectype,
95907fea
RS		 3816#ifdef CONFIG_CIFS_XATTR
3817 .query_all_EAs = smb2_query_eas,
5517554e 3818 .set_EA = smb2_set_ea,
95907fea 3819#endif /* CIFS_XATTR */
2f1afe25
SP		 3820#ifdef CONFIG_CIFS_ACL
3821 .get_acl = get_smb2_acl,
3822 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 3823 .set_acl = set_smb2_acl,
2f1afe25 3824#endif /* CIFS_ACL */
8ce79ec3 3825 .next_header = smb2_next_header,
f5b05d62 3826 .ioctl_query_info = smb2_ioctl_query_info,
1080ef75
SF		 3827};
3828
aab1893d
SF		 3829struct smb_version_operations smb311_operations = {
3830 .compare_fids = smb2_compare_fids,
3831 .setup_request = smb2_setup_request,
3832 .setup_async_request = smb2_setup_async_request,
3833 .check_receive = smb2_check_receive,
3834 .add_credits = smb2_add_credits,
3835 .set_credits = smb2_set_credits,
3836 .get_credits_field = smb2_get_credits_field,
3837 .get_credits = smb2_get_credits,
3838 .wait_mtu_credits = smb2_wait_mtu_credits,
3839 .get_next_mid = smb2_get_next_mid,
3840 .read_data_offset = smb2_read_data_offset,
3841 .read_data_length = smb2_read_data_length,
3842 .map_error = map_smb2_to_linux_error,
3843 .find_mid = smb2_find_mid,
3844 .check_message = smb2_check_message,
3845 .dump_detail = smb2_dump_detail,
3846 .clear_stats = smb2_clear_stats,
3847 .print_stats = smb2_print_stats,
3848 .dump_share_caps = smb2_dump_share_caps,
3849 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3850 .handle_cancelled_mid = smb2_handle_cancelled_mid,
aab1893d
SF		 3851 .downgrade_oplock = smb2_downgrade_oplock,
3852 .need_neg = smb2_need_neg,
3853 .negotiate = smb2_negotiate,
3d621230
SF		 3854 .negotiate_wsize = smb3_negotiate_wsize,
3855 .negotiate_rsize = smb3_negotiate_rsize,
aab1893d
SF		 3856 .sess_setup = SMB2_sess_setup,
3857 .logoff = SMB2_logoff,
3858 .tree_connect = SMB2_tcon,
3859 .tree_disconnect = SMB2_tdis,
3860 .qfs_tcon = smb3_qfs_tcon,
3861 .is_path_accessible = smb2_is_path_accessible,
3862 .can_echo = smb2_can_echo,
3863 .echo = SMB2_echo,
3864 .query_path_info = smb2_query_path_info,
3865 .get_srv_inum = smb2_get_srv_inum,
3866 .query_file_info = smb2_query_file_info,
3867 .set_path_size = smb2_set_path_size,
3868 .set_file_size = smb2_set_file_size,
3869 .set_file_info = smb2_set_file_info,
3870 .set_compression = smb2_set_compression,
3871 .mkdir = smb2_mkdir,
3872 .mkdir_setinfo = smb2_mkdir_setinfo,
bea851b8 3873 .posix_mkdir = smb311_posix_mkdir,
aab1893d
SF		 3874 .rmdir = smb2_rmdir,
3875 .unlink = smb2_unlink,
3876 .rename = smb2_rename_path,
3877 .create_hardlink = smb2_create_hardlink,
3878 .query_symlink = smb2_query_symlink,
3879 .query_mf_symlink = smb3_query_mf_symlink,
3880 .create_mf_symlink = smb3_create_mf_symlink,
3881 .open = smb2_open_file,
3882 .set_fid = smb2_set_fid,
3883 .close = smb2_close_file,
3884 .flush = smb2_flush_file,
3885 .async_readv = smb2_async_readv,
3886 .async_writev = smb2_async_writev,
3887 .sync_read = smb2_sync_read,
3888 .sync_write = smb2_sync_write,
3889 .query_dir_first = smb2_query_dir_first,
3890 .query_dir_next = smb2_query_dir_next,
3891 .close_dir = smb2_close_dir,
3892 .calc_smb_size = smb2_calc_size,
3893 .is_status_pending = smb2_is_status_pending,
511c54a2 3894 .is_session_expired = smb2_is_session_expired,
aab1893d 3895 .oplock_response = smb2_oplock_response,
2d304217 3896 .queryfs = smb311_queryfs,
aab1893d
SF		 3897 .mand_lock = smb2_mand_lock,
3898 .mand_unlock_range = smb2_unlock_range,
3899 .push_mand_locks = smb2_push_mandatory_locks,
3900 .get_lease_key = smb2_get_lease_key,
3901 .set_lease_key = smb2_set_lease_key,
3902 .new_lease_key = smb2_new_lease_key,
373512ec 3903 .generate_signingkey = generate_smb311signingkey,
aab1893d 3904 .calc_signature = smb3_calc_signature,
b3152e2c 3905 .set_integrity = smb3_set_integrity,
aab1893d
SF		 3906 .is_read_op = smb21_is_read_op,
3907 .set_oplock_level = smb3_set_oplock_level,
3908 .create_lease_buf = smb3_create_lease_buf,
3909 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 3910 .copychunk_range = smb2_copychunk_range,
02b16665 3911 .duplicate_extents = smb2_duplicate_extents,
aab1893d
SF		 3912/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3913 .wp_retry_size = smb2_wp_retry_size,
3914 .dir_needs_close = smb2_dir_needs_close,
3915 .fallocate = smb3_fallocate,
834170c8 3916 .enum_snapshots = smb3_enum_snapshots,
026e93dc 3917 .init_transform_rq = smb3_init_transform_rq,
4326ed2f
PS		 3918 .is_transform_hdr = smb3_is_transform_hdr,
3919 .receive_transform = smb3_receive_transform,
9d49640a 3920 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 3921 .select_sectype = smb2_select_sectype,
95907fea
RS		 3922#ifdef CONFIG_CIFS_XATTR
3923 .query_all_EAs = smb2_query_eas,
5517554e 3924 .set_EA = smb2_set_ea,
95907fea 3925#endif /* CIFS_XATTR */
c1777df1
RS		 3926#ifdef CONFIG_CIFS_ACL
3927 .get_acl = get_smb2_acl,
3928 .get_acl_by_fid = get_smb2_acl_by_fid,
3929 .set_acl = set_smb2_acl,
3930#endif /* CIFS_ACL */
8ce79ec3 3931 .next_header = smb2_next_header,
f5b05d62 3932 .ioctl_query_info = smb2_ioctl_query_info,
aab1893d 3933};
aab1893d 3934
dd446b16
SF		 3935struct smb_version_values smb20_values = {
3936 .version_string = SMB20_VERSION_STRING,
3937 .protocol_id = SMB20_PROT_ID,
3938 .req_capabilities = 0, /* MBZ */
3939 .large_lock_type = 0,
3940 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3941 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3942 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3943 .header_size = sizeof(struct smb2_sync_hdr),
3944 .header_preamble_size = 0,
dd446b16
SF		 3945 .max_header_size = MAX_SMB2_HDR_SIZE,
3946 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3947 .lock_cmd = SMB2_LOCK,
3948 .cap_unix = 0,
3949 .cap_nt_find = SMB2_NT_FIND,
3950 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3951 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3952 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 3953 .create_lease_size = sizeof(struct create_lease),
dd446b16
SF		 3954};
3955
1080ef75
SF		 3956struct smb_version_values smb21_values = {
3957 .version_string = SMB21_VERSION_STRING,
e4aa25e7
SF		 3958 .protocol_id = SMB21_PROT_ID,
3959 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3960 .large_lock_type = 0,
3961 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3962 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3963 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3964 .header_size = sizeof(struct smb2_sync_hdr),
3965 .header_preamble_size = 0,
e4aa25e7
SF		 3966 .max_header_size = MAX_SMB2_HDR_SIZE,
3967 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3968 .lock_cmd = SMB2_LOCK,
3969 .cap_unix = 0,
3970 .cap_nt_find = SMB2_NT_FIND,
3971 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 3972 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3973 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 3974 .create_lease_size = sizeof(struct create_lease),
e4aa25e7
SF		 3975};
3976
9764c02f
SF		 3977struct smb_version_values smb3any_values = {
3978 .version_string = SMB3ANY_VERSION_STRING,
3979 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
f8015683 3980 .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,
9764c02f
SF		 3981 .large_lock_type = 0,
3982 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3983 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3984 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 3985 .header_size = sizeof(struct smb2_sync_hdr),
3986 .header_preamble_size = 0,
9764c02f
SF		 3987 .max_header_size = MAX_SMB2_HDR_SIZE,
3988 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3989 .lock_cmd = SMB2_LOCK,
3990 .cap_unix = 0,
3991 .cap_nt_find = SMB2_NT_FIND,
3992 .cap_large_files = SMB2_LARGE_FILES,
3993 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3994 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3995 .create_lease_size = sizeof(struct create_lease_v2),
3996};
3997
3998struct smb_version_values smbdefault_values = {
3999 .version_string = SMBDEFAULT_VERSION_STRING,
4000 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
f8015683 4001 .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,
9764c02f
SF		 4002 .large_lock_type = 0,
4003 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4004 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4005 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4006 .header_size = sizeof(struct smb2_sync_hdr),
4007 .header_preamble_size = 0,
9764c02f
SF		 4008 .max_header_size = MAX_SMB2_HDR_SIZE,
4009 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4010 .lock_cmd = SMB2_LOCK,
4011 .cap_unix = 0,
4012 .cap_nt_find = SMB2_NT_FIND,
4013 .cap_large_files = SMB2_LARGE_FILES,
4014 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4015 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4016 .create_lease_size = sizeof(struct create_lease_v2),
4017};
4018
e4aa25e7
SF		 4019struct smb_version_values smb30_values = {
4020 .version_string = SMB30_VERSION_STRING,
4021 .protocol_id = SMB30_PROT_ID,
f8015683 4022 .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,
027e8eec
PS		 4023 .large_lock_type = 0,
4024 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4025 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4026 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4027 .header_size = sizeof(struct smb2_sync_hdr),
4028 .header_preamble_size = 0,
093b2bda 4029 .max_header_size = MAX_SMB2_HDR_SIZE,
09a4707e 4030 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2dc7e1c0 4031 .lock_cmd = SMB2_LOCK,
29e20f9c
PS		 4032 .cap_unix = 0,
4033 .cap_nt_find = SMB2_NT_FIND,
4034 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 4035 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4036 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 4037 .create_lease_size = sizeof(struct create_lease_v2),
1080ef75 4038};
20b6d8b4
SF		 4039
4040struct smb_version_values smb302_values = {
4041 .version_string = SMB302_VERSION_STRING,
4042 .protocol_id = SMB302_PROT_ID,
f8015683 4043 .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,
20b6d8b4
SF		 4044 .large_lock_type = 0,
4045 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4046 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4047 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4048 .header_size = sizeof(struct smb2_sync_hdr),
4049 .header_preamble_size = 0,
20b6d8b4
SF		 4050 .max_header_size = MAX_SMB2_HDR_SIZE,
4051 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4052 .lock_cmd = SMB2_LOCK,
4053 .cap_unix = 0,
4054 .cap_nt_find = SMB2_NT_FIND,
4055 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 4056 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4057 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 4058 .create_lease_size = sizeof(struct create_lease_v2),
20b6d8b4 4059};
5f7fbf73 4060
5f7fbf73
SF		 4061struct smb_version_values smb311_values = {
4062 .version_string = SMB311_VERSION_STRING,
4063 .protocol_id = SMB311_PROT_ID,
f8015683 4064 .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,
5f7fbf73
SF		 4065 .large_lock_type = 0,
4066 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4067 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4068 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4069 .header_size = sizeof(struct smb2_sync_hdr),
4070 .header_preamble_size = 0,
5f7fbf73
SF		 4071 .max_header_size = MAX_SMB2_HDR_SIZE,
4072 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4073 .lock_cmd = SMB2_LOCK,
4074 .cap_unix = 0,
4075 .cap_nt_find = SMB2_NT_FIND,
4076 .cap_large_files = SMB2_LARGE_FILES,
4077 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4078 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4079 .create_lease_size = sizeof(struct create_lease_v2),
4080};
Linux 6.x block layer and io_uring tree(s)