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cifs: fix handle leak in smb2_query_symlink()
[thirdparty/linux.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
335b7b62
PS		 70smb2_add_credits(struct TCP_Server_Info *server,
71 const struct cifs_credits *credits, const int optype)
28ea5290 72{
ef68e831 73 int *val, rc = -1;
335b7b62
PS		 74 unsigned int add = credits->value;
75 unsigned int instance = credits->instance;
76 bool reconnect_detected = false;
ef68e831 77
28ea5290
PS		 78 spin_lock(&server->req_lock);
79 val = server->ops->get_credits_field(server, optype);
b340a4d4
SF		 80
81 /* eg found case where write overlapping reconnect messed up credits */
82 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
83 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
84 server->hostname, *val);
335b7b62
PS		 85 if ((instance == 0) || (instance == server->reconnect_instance))
86 *val += add;
87 else
88 reconnect_detected = true;
b340a4d4 89
141891f4
SF		 90 if (*val > 65000) {
91 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
92 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
93 }
28ea5290 94 server->in_flight--;
ec2e4523 95 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
28ea5290 96 rc = change_conf(server);
983c88a4
PS		 97 /*
98 * Sometimes server returns 0 credits on oplock break ack - we need to
99 * rebalance credits in this case.
100 */
101 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
102 server->oplocks) {
103 if (server->credits > 1) {
104 server->credits--;
105 server->oplock_credits++;
106 }
107 }
28ea5290
PS		 108 spin_unlock(&server->req_lock);
109 wake_up(&server->request_q);
ef68e831 110
335b7b62
PS		 111 if (reconnect_detected)
112 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
113 add, instance);
114
82e0457a
PS		 115 if (server->tcpStatus == CifsNeedReconnect
116 || server->tcpStatus == CifsExiting)
ef68e831
PS		 117 return;
118
119 switch (rc) {
120 case -1:
121 /* change_conf hasn't been executed */
122 break;
123 case 0:
124 cifs_dbg(VFS, "Possible client or server bug - zero credits\n");
125 break;
126 case 1:
127 cifs_dbg(VFS, "disabling echoes and oplocks\n");
128 break;
129 case 2:
130 cifs_dbg(FYI, "disabling oplocks\n");
131 break;
132 default:
133 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
134 }
28ea5290
PS		 135}
136
137static void
138smb2_set_credits(struct TCP_Server_Info *server, const int val)
139{
140 spin_lock(&server->req_lock);
141 server->credits = val;
9e1a37da
SF		 142 if (val == 1)
143 server->reconnect_instance++;
28ea5290 144 spin_unlock(&server->req_lock);
6e4d3bbe
SF		 145 /* don't log while holding the lock */
146 if (val == 1)
147 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
28ea5290
PS		 148}
149
150static int *
151smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
152{
153 switch (optype) {
154 case CIFS_ECHO_OP:
155 return &server->echo_credits;
156 case CIFS_OBREAK_OP:
157 return &server->oplock_credits;
158 default:
159 return &server->credits;
160 }
161}
162
163static unsigned int
164smb2_get_credits(struct mid_q_entry *mid)
165{
49f466bd 166 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
31473fc4 167
3d3003fc
PS		 168 if (mid->mid_state == MID_RESPONSE_RECEIVED
169 || mid->mid_state == MID_RESPONSE_MALFORMED)
170 return le16_to_cpu(shdr->CreditRequest);
171
172 return 0;
28ea5290 173}
2dc7e1c0 174
cb7e9eab
PS		 175static int
176smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
335b7b62 177 unsigned int *num, struct cifs_credits *credits)
cb7e9eab
PS		 178{
179 int rc = 0;
180 unsigned int scredits;
181
182 spin_lock(&server->req_lock);
183 while (1) {
184 if (server->credits <= 0) {
185 spin_unlock(&server->req_lock);
186 cifs_num_waiters_inc(server);
187 rc = wait_event_killable(server->request_q,
b227d215 188 has_credits(server, &server->credits, 1));
cb7e9eab
PS		 189 cifs_num_waiters_dec(server);
190 if (rc)
191 return rc;
192 spin_lock(&server->req_lock);
193 } else {
194 if (server->tcpStatus == CifsExiting) {
195 spin_unlock(&server->req_lock);
196 return -ENOENT;
197 }
198
199 scredits = server->credits;
200 /* can deadlock with reopen */
acc58d0b 201 if (scredits <= 8) {
cb7e9eab 202 *num = SMB2_MAX_BUFFER_SIZE;
335b7b62
PS		 203 credits->value = 0;
204 credits->instance = 0;
cb7e9eab
PS		 205 break;
206 }
207
acc58d0b
PS		 208 /* leave some credits for reopen and other ops */
209 scredits -= 8;
cb7e9eab
PS		 210 *num = min_t(unsigned int, size,
211 scredits * SMB2_MAX_BUFFER_SIZE);
212
335b7b62
PS		 213 credits->value =
214 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
215 credits->instance = server->reconnect_instance;
216 server->credits -= credits->value;
cb7e9eab
PS		 217 server->in_flight++;
218 break;
219 }
220 }
221 spin_unlock(&server->req_lock);
222 return rc;
223}
224
9a1c67e8
PS		 225static int
226smb2_adjust_credits(struct TCP_Server_Info *server,
227 struct cifs_credits *credits,
228 const unsigned int payload_size)
229{
230 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
231
232 if (!credits->value || credits->value == new_val)
233 return 0;
234
235 if (credits->value < new_val) {
236 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
237 credits->value, new_val);
238 return -ENOTSUPP;
239 }
240
241 spin_lock(&server->req_lock);
242
243 if (server->reconnect_instance != credits->instance) {
244 spin_unlock(&server->req_lock);
245 cifs_dbg(VFS, "trying to return %d credits to old session\n",
246 credits->value - new_val);
247 return -EAGAIN;
248 }
249
250 server->credits += credits->value - new_val;
251 spin_unlock(&server->req_lock);
252 wake_up(&server->request_q);
253 credits->value = new_val;
254 return 0;
255}
256
2dc7e1c0
PS		 257static __u64
258smb2_get_next_mid(struct TCP_Server_Info *server)
259{
260 __u64 mid;
261 /* for SMB2 we need the current value */
262 spin_lock(&GlobalMid_Lock);
263 mid = server->CurrentMid++;
264 spin_unlock(&GlobalMid_Lock);
265 return mid;
266}
1080ef75 267
c781af7e
PS		 268static void
269smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
270{
271 spin_lock(&GlobalMid_Lock);
272 if (server->CurrentMid >= val)
273 server->CurrentMid -= val;
274 spin_unlock(&GlobalMid_Lock);
275}
276
093b2bda
PS		 277static struct mid_q_entry *
278smb2_find_mid(struct TCP_Server_Info *server, char *buf)
279{
280 struct mid_q_entry *mid;
49f466bd 281 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
31473fc4 282 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
093b2bda 283
31473fc4 284 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
373512ec
SF		 285 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
286 return NULL;
287 }
288
093b2bda
PS		 289 spin_lock(&GlobalMid_Lock);
290 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
9235d098 291 if ((mid->mid == wire_mid) &&
093b2bda 292 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
31473fc4 293 (mid->command == shdr->Command)) {
696e420b 294 kref_get(&mid->refcount);
093b2bda
PS		 295 spin_unlock(&GlobalMid_Lock);
296 return mid;
297 }
298 }
299 spin_unlock(&GlobalMid_Lock);
300 return NULL;
301}
302
303static void
14547f7d 304smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
093b2bda
PS		 305{
306#ifdef CONFIG_CIFS_DEBUG2
49f466bd 307 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
093b2bda 308
f96637be 309 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
31473fc4
PS		 310 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
311 shdr->ProcessId);
14547f7d 312 cifs_dbg(VFS, "smb buf %p len %u\n", buf,
71992e62 313 server->ops->calc_smb_size(buf, server));
093b2bda
PS		 314#endif
315}
316
ec2e4523
PS		 317static bool
318smb2_need_neg(struct TCP_Server_Info *server)
319{
320 return server->max_read == 0;
321}
322
323static int
324smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
325{
326 int rc;
327 ses->server->CurrentMid = 0;
328 rc = SMB2_negotiate(xid, ses);
329 /* BB we probably don't need to retry with modern servers */
330 if (rc == -EAGAIN)
331 rc = -EHOSTDOWN;
332 return rc;
333}
334
3a3bab50
PS		 335static unsigned int
336smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
337{
338 struct TCP_Server_Info *server = tcon->ses->server;
339 unsigned int wsize;
340
341 /* start with specified wsize, or default */
342 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
343 wsize = min_t(unsigned int, wsize, server->max_write);
09902f8d 344#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 345 if (server->rdma) {
346 if (server->sign)
347 wsize = min_t(unsigned int,
348 wsize, server->smbd_conn->max_fragmented_send_size);
349 else
350 wsize = min_t(unsigned int,
09902f8d 351 wsize, server->smbd_conn->max_readwrite_size);
bb4c0419 352 }
09902f8d 353#endif
cb7e9eab
PS		 354 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
355 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 356
3a3bab50
PS		 357 return wsize;
358}
359
3d621230
SF		 360static unsigned int
361smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
362{
363 struct TCP_Server_Info *server = tcon->ses->server;
364 unsigned int wsize;
365
366 /* start with specified wsize, or default */
367 wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
368 wsize = min_t(unsigned int, wsize, server->max_write);
369#ifdef CONFIG_CIFS_SMB_DIRECT
370 if (server->rdma) {
371 if (server->sign)
372 wsize = min_t(unsigned int,
373 wsize, server->smbd_conn->max_fragmented_send_size);
374 else
375 wsize = min_t(unsigned int,
376 wsize, server->smbd_conn->max_readwrite_size);
377 }
378#endif
379 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
380 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
381
382 return wsize;
383}
384
3a3bab50
PS		 385static unsigned int
386smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
387{
388 struct TCP_Server_Info *server = tcon->ses->server;
389 unsigned int rsize;
390
391 /* start with specified rsize, or default */
392 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
393 rsize = min_t(unsigned int, rsize, server->max_read);
09902f8d 394#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 395 if (server->rdma) {
396 if (server->sign)
397 rsize = min_t(unsigned int,
398 rsize, server->smbd_conn->max_fragmented_recv_size);
399 else
400 rsize = min_t(unsigned int,
09902f8d 401 rsize, server->smbd_conn->max_readwrite_size);
bb4c0419 402 }
09902f8d 403#endif
bed9da02
PS		 404
405 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
406 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 407
3a3bab50
PS		 408 return rsize;
409}
410
3d621230
SF		 411static unsigned int
412smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
413{
414 struct TCP_Server_Info *server = tcon->ses->server;
415 unsigned int rsize;
416
417 /* start with specified rsize, or default */
418 rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
419 rsize = min_t(unsigned int, rsize, server->max_read);
420#ifdef CONFIG_CIFS_SMB_DIRECT
421 if (server->rdma) {
422 if (server->sign)
423 rsize = min_t(unsigned int,
424 rsize, server->smbd_conn->max_fragmented_recv_size);
425 else
426 rsize = min_t(unsigned int,
427 rsize, server->smbd_conn->max_readwrite_size);
428 }
429#endif
430
431 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
432 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
433
434 return rsize;
435}
fe856be4
AA		 436
437static int
438parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
439 size_t buf_len,
440 struct cifs_server_iface **iface_list,
441 size_t *iface_count)
442{
443 struct network_interface_info_ioctl_rsp *p;
444 struct sockaddr_in *addr4;
445 struct sockaddr_in6 *addr6;
446 struct iface_info_ipv4 *p4;
447 struct iface_info_ipv6 *p6;
448 struct cifs_server_iface *info;
449 ssize_t bytes_left;
450 size_t next = 0;
451 int nb_iface = 0;
452 int rc = 0;
453
454 *iface_list = NULL;
455 *iface_count = 0;
456
457 /*
458 * Fist pass: count and sanity check
459 */
460
461 bytes_left = buf_len;
462 p = buf;
463 while (bytes_left >= sizeof(*p)) {
464 nb_iface++;
465 next = le32_to_cpu(p->Next);
466 if (!next) {
467 bytes_left -= sizeof(*p);
468 break;
469 }
470 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
471 bytes_left -= next;
472 }
473
474 if (!nb_iface) {
475 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
476 rc = -EINVAL;
477 goto out;
478 }
479
480 if (bytes_left || p->Next)
481 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
482
483
484 /*
485 * Second pass: extract info to internal structure
486 */
487
488 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
489 if (!*iface_list) {
490 rc = -ENOMEM;
491 goto out;
492 }
493
494 info = *iface_list;
495 bytes_left = buf_len;
496 p = buf;
497 while (bytes_left >= sizeof(*p)) {
498 info->speed = le64_to_cpu(p->LinkSpeed);
499 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
500 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
501
502 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
503 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
504 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
505 le32_to_cpu(p->Capability));
506
507 switch (p->Family) {
508 /*
509 * The kernel and wire socket structures have the same
510 * layout and use network byte order but make the
511 * conversion explicit in case either one changes.
512 */
513 case INTERNETWORK:
514 addr4 = (struct sockaddr_in *)&info->sockaddr;
515 p4 = (struct iface_info_ipv4 *)p->Buffer;
516 addr4->sin_family = AF_INET;
517 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
518
519 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
520 addr4->sin_port = cpu_to_be16(CIFS_PORT);
521
522 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
523 &addr4->sin_addr);
524 break;
525 case INTERNETWORKV6:
526 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
527 p6 = (struct iface_info_ipv6 *)p->Buffer;
528 addr6->sin6_family = AF_INET6;
529 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
530
531 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
532 addr6->sin6_flowinfo = 0;
533 addr6->sin6_scope_id = 0;
534 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
535
536 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
537 &addr6->sin6_addr);
538 break;
539 default:
540 cifs_dbg(VFS,
541 "%s: skipping unsupported socket family\n",
542 __func__);
543 goto next_iface;
544 }
545
546 (*iface_count)++;
547 info++;
548next_iface:
549 next = le32_to_cpu(p->Next);
550 if (!next)
551 break;
552 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
553 bytes_left -= next;
554 }
555
556 if (!*iface_count) {
557 rc = -EINVAL;
558 goto out;
559 }
560
561out:
562 if (rc) {
563 kfree(*iface_list);
564 *iface_count = 0;
565 *iface_list = NULL;
566 }
567 return rc;
568}
569
570
c481e9fe
SF		 571static int
572SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
573{
574 int rc;
575 unsigned int ret_data_len = 0;
fe856be4
AA		 576 struct network_interface_info_ioctl_rsp *out_buf = NULL;
577 struct cifs_server_iface *iface_list;
578 size_t iface_count;
579 struct cifs_ses *ses = tcon->ses;
c481e9fe
SF		 580
581 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
582 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
583 NULL /* no data input */, 0 /* no data input */,
153322f7 584 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
c3ed4402
SF		 585 if (rc == -EOPNOTSUPP) {
586 cifs_dbg(FYI,
587 "server does not support query network interfaces\n");
588 goto out;
589 } else if (rc != 0) {
9ffc5412 590 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
fe856be4 591 goto out;
9ffc5412 592 }
fe856be4
AA		 593
594 rc = parse_server_interfaces(out_buf, ret_data_len,
595 &iface_list, &iface_count);
596 if (rc)
597 goto out;
598
599 spin_lock(&ses->iface_lock);
600 kfree(ses->iface_list);
601 ses->iface_list = iface_list;
602 ses->iface_count = iface_count;
603 ses->iface_last_update = jiffies;
604 spin_unlock(&ses->iface_lock);
605
606out:
24df1483 607 kfree(out_buf);
c481e9fe
SF		 608 return rc;
609}
c481e9fe 610
9da6ec77
RS		 611static void
612smb2_close_cached_fid(struct kref *ref)
a93864d9 613{
9da6ec77
RS		 614 struct cached_fid *cfid = container_of(ref, struct cached_fid,
615 refcount);
616
a93864d9
RS		 617 if (cfid->is_valid) {
618 cifs_dbg(FYI, "clear cached root file handle\n");
619 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
620 cfid->fid->volatile_fid);
621 cfid->is_valid = false;
b0f6df73 622 cfid->file_all_info_is_valid = false;
a93864d9 623 }
9da6ec77
RS		 624}
625
626void close_shroot(struct cached_fid *cfid)
627{
628 mutex_lock(&cfid->fid_mutex);
629 kref_put(&cfid->refcount, smb2_close_cached_fid);
a93864d9
RS		 630 mutex_unlock(&cfid->fid_mutex);
631}
632
9da6ec77
RS		 633void
634smb2_cached_lease_break(struct work_struct *work)
635{
636 struct cached_fid *cfid = container_of(work,
637 struct cached_fid, lease_break);
638
639 close_shroot(cfid);
640}
641
3d4ef9a1
SF		 642/*
643 * Open the directory at the root of a share
644 */
645int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
646{
b0f6df73
RS		 647 struct cifs_ses *ses = tcon->ses;
648 struct TCP_Server_Info *server = ses->server;
649 struct cifs_open_parms oparms;
650 struct smb2_create_rsp *o_rsp = NULL;
651 struct smb2_query_info_rsp *qi_rsp = NULL;
652 int resp_buftype[2];
653 struct smb_rqst rqst[2];
654 struct kvec rsp_iov[2];
655 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
656 struct kvec qi_iov[1];
657 int rc, flags = 0;
658 __le16 utf16_path = 0; /* Null - since an open of top of share */
a93864d9 659 u8 oplock = SMB2_OPLOCK_LEVEL_II;
3d4ef9a1 660
a93864d9
RS		 661 mutex_lock(&tcon->crfid.fid_mutex);
662 if (tcon->crfid.is_valid) {
3d4ef9a1 663 cifs_dbg(FYI, "found a cached root file handle\n");
a93864d9 664 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
9da6ec77 665 kref_get(&tcon->crfid.refcount);
a93864d9 666 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 667 return 0;
668 }
669
b0f6df73
RS		 670 if (smb3_encryption_required(tcon))
671 flags |= CIFS_TRANSFORM_REQ;
672
673 memset(rqst, 0, sizeof(rqst));
674 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
675 memset(rsp_iov, 0, sizeof(rsp_iov));
676
677 /* Open */
678 memset(&open_iov, 0, sizeof(open_iov));
679 rqst[0].rq_iov = open_iov;
680 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
681
682 oparms.tcon = tcon;
683 oparms.create_options = 0;
684 oparms.desired_access = FILE_READ_ATTRIBUTES;
685 oparms.disposition = FILE_OPEN;
686 oparms.fid = pfid;
687 oparms.reconnect = false;
688
689 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
690 if (rc)
691 goto oshr_exit;
692 smb2_set_next_command(tcon, &rqst[0]);
693
694 memset(&qi_iov, 0, sizeof(qi_iov));
695 rqst[1].rq_iov = qi_iov;
696 rqst[1].rq_nvec = 1;
697
698 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
699 COMPOUND_FID, FILE_ALL_INFORMATION,
700 SMB2_O_INFO_FILE, 0,
701 sizeof(struct smb2_file_all_info) +
702 PATH_MAX * 2, 0, NULL);
703 if (rc)
704 goto oshr_exit;
705
706 smb2_set_related(&rqst[1]);
707
708 rc = compound_send_recv(xid, ses, flags, 2, rqst,
709 resp_buftype, rsp_iov);
710 if (rc)
711 goto oshr_exit;
712
713 o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
714 oparms.fid->persistent_fid = o_rsp->PersistentFileId;
715 oparms.fid->volatile_fid = o_rsp->VolatileFileId;
716#ifdef CONFIG_CIFS_DEBUG2
717 oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
718#endif /* CIFS_DEBUG2 */
719
b0f6df73
RS		 720 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
721 tcon->crfid.tcon = tcon;
722 tcon->crfid.is_valid = true;
723 kref_init(&tcon->crfid.refcount);
b0f6df73 724
2f94a312
RS		 725 if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
726 kref_get(&tcon->crfid.refcount);
727 oplock = smb2_parse_lease_state(server, o_rsp,
728 &oparms.fid->epoch,
729 oparms.fid->lease_key);
730 } else
731 goto oshr_exit;
b0f6df73
RS		 732
733 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
734 if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
735 goto oshr_exit;
4811e309 736 if (!smb2_validate_and_copy_iov(
b0f6df73
RS		 737 le16_to_cpu(qi_rsp->OutputBufferOffset),
738 sizeof(struct smb2_file_all_info),
739 &rsp_iov[1], sizeof(struct smb2_file_all_info),
4811e309
RS		 740 (char *)&tcon->crfid.file_all_info))
741 tcon->crfid.file_all_info_is_valid = 1;
b0f6df73
RS		 742
743 oshr_exit:
a93864d9 744 mutex_unlock(&tcon->crfid.fid_mutex);
b0f6df73
RS		 745 SMB2_open_free(&rqst[0]);
746 SMB2_query_info_free(&rqst[1]);
747 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
748 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3d4ef9a1
SF		 749 return rc;
750}
751
af6a12ea
SF		 752static void
753smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
754{
755 int rc;
756 __le16 srch_path = 0; /* Null - open root of share */
757 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
758 struct cifs_open_parms oparms;
759 struct cifs_fid fid;
3d4ef9a1 760 bool no_cached_open = tcon->nohandlecache;
af6a12ea
SF		 761
762 oparms.tcon = tcon;
763 oparms.desired_access = FILE_READ_ATTRIBUTES;
764 oparms.disposition = FILE_OPEN;
765 oparms.create_options = 0;
766 oparms.fid = &fid;
767 oparms.reconnect = false;
768
3d4ef9a1 769 if (no_cached_open)
9d874c36
RS		 770 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
771 NULL);
3d4ef9a1
SF		 772 else
773 rc = open_shroot(xid, tcon, &fid);
774
af6a12ea
SF		 775 if (rc)
776 return;
777
c481e9fe 778 SMB3_request_interfaces(xid, tcon);
c481e9fe 779
af6a12ea
SF		 780 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
781 FS_ATTRIBUTE_INFORMATION);
782 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
783 FS_DEVICE_INFORMATION);
21ba3845
SF		 784 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
785 FS_VOLUME_INFORMATION);
af6a12ea
SF		 786 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
787 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
3d4ef9a1
SF		 788 if (no_cached_open)
789 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
9da6ec77
RS		 790 else
791 close_shroot(&tcon->crfid);
792
af6a12ea
SF		 793 return;
794}
795
34f62640
SF		 796static void
797smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
798{
799 int rc;
800 __le16 srch_path = 0; /* Null - open root of share */
801 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
802 struct cifs_open_parms oparms;
803 struct cifs_fid fid;
804
805 oparms.tcon = tcon;
806 oparms.desired_access = FILE_READ_ATTRIBUTES;
807 oparms.disposition = FILE_OPEN;
808 oparms.create_options = 0;
809 oparms.fid = &fid;
810 oparms.reconnect = false;
811
9d874c36 812 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
34f62640
SF		 813 if (rc)
814 return;
815
2167114c
SF		 816 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
817 FS_ATTRIBUTE_INFORMATION);
818 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
819 FS_DEVICE_INFORMATION);
34f62640
SF		 820 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
821 return;
822}
823
2503a0db
PS		 824static int
825smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
826 struct cifs_sb_info *cifs_sb, const char *full_path)
827{
828 int rc;
2503a0db 829 __le16 *utf16_path;
2e44b288 830 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 831 struct cifs_open_parms oparms;
832 struct cifs_fid fid;
2503a0db 833
a93864d9 834 if ((*full_path == 0) && tcon->crfid.is_valid)
3d4ef9a1
SF		 835 return 0;
836
2503a0db
PS		 837 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
838 if (!utf16_path)
839 return -ENOMEM;
840
064f6047
PS		 841 oparms.tcon = tcon;
842 oparms.desired_access = FILE_READ_ATTRIBUTES;
843 oparms.disposition = FILE_OPEN;
5e19697b
SF		 844 if (backup_cred(cifs_sb))
845 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
846 else
847 oparms.create_options = 0;
064f6047 848 oparms.fid = &fid;
9cbc0b73 849 oparms.reconnect = false;
064f6047 850
9d874c36 851 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2503a0db
PS		 852 if (rc) {
853 kfree(utf16_path);
854 return rc;
855 }
856
064f6047 857 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2503a0db
PS		 858 kfree(utf16_path);
859 return rc;
860}
861
be4cb9e3
PS		 862static int
863smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
864 struct cifs_sb_info *cifs_sb, const char *full_path,
865 u64 *uniqueid, FILE_ALL_INFO *data)
866{
867 *uniqueid = le64_to_cpu(data->IndexNumber);
868 return 0;
869}
870
b7546bc5
PS		 871static int
872smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
873 struct cifs_fid *fid, FILE_ALL_INFO *data)
874{
875 int rc;
876 struct smb2_file_all_info *smb2_data;
877
1bbe4997 878 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
b7546bc5
PS		 879 GFP_KERNEL);
880 if (smb2_data == NULL)
881 return -ENOMEM;
882
883 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
884 smb2_data);
885 if (!rc)
886 move_smb2_info_to_cifs(data, smb2_data);
887 kfree(smb2_data);
888 return rc;
889}
890
1368f155 891#ifdef CONFIG_CIFS_XATTR
95907fea
RS		 892static ssize_t
893move_smb2_ea_to_cifs(char *dst, size_t dst_size,
894 struct smb2_file_full_ea_info *src, size_t src_size,
895 const unsigned char *ea_name)
896{
897 int rc = 0;
898 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
899 char *name, *value;
0c5d6cb6 900 size_t buf_size = dst_size;
95907fea
RS		 901 size_t name_len, value_len, user_name_len;
902
903 while (src_size > 0) {
904 name = &src->ea_data[0];
905 name_len = (size_t)src->ea_name_length;
906 value = &src->ea_data[src->ea_name_length + 1];
907 value_len = (size_t)le16_to_cpu(src->ea_value_length);
908
909 if (name_len == 0) {
910 break;
911 }
912
913 if (src_size < 8 + name_len + 1 + value_len) {
914 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
915 rc = -EIO;
916 goto out;
917 }
918
919 if (ea_name) {
920 if (ea_name_len == name_len &&
921 memcmp(ea_name, name, name_len) == 0) {
922 rc = value_len;
923 if (dst_size == 0)
924 goto out;
925 if (dst_size < value_len) {
926 rc = -ERANGE;
927 goto out;
928 }
929 memcpy(dst, value, value_len);
930 goto out;
931 }
932 } else {
933 /* 'user.' plus a terminating null */
934 user_name_len = 5 + 1 + name_len;
935
0c5d6cb6
RS		 936 if (buf_size == 0) {
937 /* skip copy - calc size only */
938 rc += user_name_len;
939 } else if (dst_size >= user_name_len) {
95907fea
RS		 940 dst_size -= user_name_len;
941 memcpy(dst, "user.", 5);
942 dst += 5;
943 memcpy(dst, src->ea_data, name_len);
944 dst += name_len;
945 *dst = 0;
946 ++dst;
0c5d6cb6 947 rc += user_name_len;
95907fea
RS		 948 } else {
949 /* stop before overrun buffer */
950 rc = -ERANGE;
951 break;
952 }
953 }
954
955 if (!src->next_entry_offset)
956 break;
957
958 if (src_size < le32_to_cpu(src->next_entry_offset)) {
959 /* stop before overrun buffer */
960 rc = -ERANGE;
961 break;
962 }
963 src_size -= le32_to_cpu(src->next_entry_offset);
964 src = (void *)((char *)src +
965 le32_to_cpu(src->next_entry_offset));
966 }
967
968 /* didn't find the named attribute */
969 if (ea_name)
970 rc = -ENODATA;
971
972out:
973 return (ssize_t)rc;
974}
975
976static ssize_t
977smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
978 const unsigned char *path, const unsigned char *ea_name,
979 char *ea_data, size_t buf_size,
980 struct cifs_sb_info *cifs_sb)
981{
982 int rc;
983 __le16 *utf16_path;
f9793b6f
RS		 984 struct kvec rsp_iov = {NULL, 0};
985 int buftype = CIFS_NO_BUFFER;
986 struct smb2_query_info_rsp *rsp;
987 struct smb2_file_full_ea_info *info = NULL;
95907fea
RS		 988
989 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
990 if (!utf16_path)
991 return -ENOMEM;
992
f9793b6f
RS		 993 rc = smb2_query_info_compound(xid, tcon, utf16_path,
994 FILE_READ_EA,
995 FILE_FULL_EA_INFORMATION,
996 SMB2_O_INFO_FILE,
c4627e66
RS		 997 CIFSMaxBufSize -
998 MAX_SMB2_CREATE_RESPONSE_SIZE -
999 MAX_SMB2_CLOSE_RESPONSE_SIZE,
f9793b6f 1000 &rsp_iov, &buftype, cifs_sb);
95907fea 1001 if (rc) {
f9793b6f
RS		 1002 /*
1003 * If ea_name is NULL (listxattr) and there are no EAs,
1004 * return 0 as it's not an error. Otherwise, the specified
1005 * ea_name was not found.
1006 */
1007 if (!ea_name && rc == -ENODATA)
1008 rc = 0;
1009 goto qeas_exit;
95907fea
RS		 1010 }
1011
f9793b6f
RS		 1012 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1013 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1014 le32_to_cpu(rsp->OutputBufferLength),
1015 &rsp_iov,
1016 sizeof(struct smb2_file_full_ea_info));
1017 if (rc)
1018 goto qeas_exit;
95907fea 1019
f9793b6f
RS		 1020 info = (struct smb2_file_full_ea_info *)(
1021 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1022 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1023 le32_to_cpu(rsp->OutputBufferLength), ea_name);
95907fea 1024
f9793b6f
RS		 1025 qeas_exit:
1026 kfree(utf16_path);
1027 free_rsp_buf(buftype, rsp_iov.iov_base);
95907fea
RS		 1028 return rc;
1029}
1030
5517554e
RS		 1031
1032static int
1033smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1034 const char *path, const char *ea_name, const void *ea_value,
1035 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1036 struct cifs_sb_info *cifs_sb)
1037{
0967e545 1038 struct cifs_ses *ses = tcon->ses;
0967e545 1039 __le16 *utf16_path = NULL;
5517554e 1040 int ea_name_len = strlen(ea_name);
0967e545 1041 int flags = 0;
5517554e 1042 int len;
0967e545
RS		 1043 struct smb_rqst rqst[3];
1044 int resp_buftype[3];
1045 struct kvec rsp_iov[3];
1046 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1047 struct cifs_open_parms oparms;
1048 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1049 struct cifs_fid fid;
1050 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1051 unsigned int size[1];
1052 void *data[1];
1053 struct smb2_file_full_ea_info *ea = NULL;
1054 struct kvec close_iov[1];
1055 int rc;
1056
1057 if (smb3_encryption_required(tcon))
1058 flags |= CIFS_TRANSFORM_REQ;
5517554e
RS		 1059
1060 if (ea_name_len > 255)
1061 return -EINVAL;
1062
1063 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1064 if (!utf16_path)
1065 return -ENOMEM;
1066
0967e545
RS		 1067 memset(rqst, 0, sizeof(rqst));
1068 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1069 memset(rsp_iov, 0, sizeof(rsp_iov));
1070
21094641
RS		 1071 if (ses->server->ops->query_all_EAs) {
1072 if (!ea_value) {
1073 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1074 ea_name, NULL, 0,
1075 cifs_sb);
1076 if (rc == -ENODATA)
1077 goto sea_exit;
1078 }
1079 }
1080
0967e545
RS		 1081 /* Open */
1082 memset(&open_iov, 0, sizeof(open_iov));
1083 rqst[0].rq_iov = open_iov;
1084 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1085
1086 memset(&oparms, 0, sizeof(oparms));
5517554e
RS		 1087 oparms.tcon = tcon;
1088 oparms.desired_access = FILE_WRITE_EA;
1089 oparms.disposition = FILE_OPEN;
5e19697b
SF		 1090 if (backup_cred(cifs_sb))
1091 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1092 else
1093 oparms.create_options = 0;
5517554e
RS		 1094 oparms.fid = &fid;
1095 oparms.reconnect = false;
1096
0967e545
RS		 1097 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1098 if (rc)
1099 goto sea_exit;
e77fe73c 1100 smb2_set_next_command(tcon, &rqst[0]);
0967e545
RS		 1101
1102
1103 /* Set Info */
1104 memset(&si_iov, 0, sizeof(si_iov));
1105 rqst[1].rq_iov = si_iov;
1106 rqst[1].rq_nvec = 1;
5517554e
RS		 1107
1108 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1109 ea = kzalloc(len, GFP_KERNEL);
1110 if (ea == NULL) {
0967e545
RS		 1111 rc = -ENOMEM;
1112 goto sea_exit;
5517554e
RS		 1113 }
1114
1115 ea->ea_name_length = ea_name_len;
1116 ea->ea_value_length = cpu_to_le16(ea_value_len);
1117 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1118 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1119
0967e545
RS		 1120 size[0] = len;
1121 data[0] = ea;
1122
1123 rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1124 COMPOUND_FID, current->tgid,
1125 FILE_FULL_EA_INFORMATION,
1126 SMB2_O_INFO_FILE, 0, data, size);
e77fe73c 1127 smb2_set_next_command(tcon, &rqst[1]);
0967e545 1128 smb2_set_related(&rqst[1]);
6aa0c114 1129
5517554e 1130
0967e545
RS		 1131 /* Close */
1132 memset(&close_iov, 0, sizeof(close_iov));
1133 rqst[2].rq_iov = close_iov;
1134 rqst[2].rq_nvec = 1;
1135 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1136 smb2_set_related(&rqst[2]);
1137
1138 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1139 resp_buftype, rsp_iov);
1140
1141 sea_exit:
1142 kfree(ea);
1143 kfree(utf16_path);
1144 SMB2_open_free(&rqst[0]);
1145 SMB2_set_info_free(&rqst[1]);
1146 SMB2_close_free(&rqst[2]);
1147 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1148 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1149 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
5517554e
RS		 1150 return rc;
1151}
1368f155 1152#endif
5517554e 1153
9094fad1
PS		 1154static bool
1155smb2_can_echo(struct TCP_Server_Info *server)
1156{
1157 return server->echoes;
1158}
1159
d60622eb
PS		 1160static void
1161smb2_clear_stats(struct cifs_tcon *tcon)
1162{
d60622eb
PS		 1163 int i;
1164 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1165 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1166 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1167 }
d60622eb
PS		 1168}
1169
769ee6a4
SF		 1170static void
1171smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1172{
1173 seq_puts(m, "\n\tShare Capabilities:");
1174 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1175 seq_puts(m, " DFS,");
1176 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1177 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1178 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1179 seq_puts(m, " SCALEOUT,");
1180 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1181 seq_puts(m, " CLUSTER,");
1182 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1183 seq_puts(m, " ASYMMETRIC,");
1184 if (tcon->capabilities == 0)
1185 seq_puts(m, " None");
af6a12ea
SF		 1186 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1187 seq_puts(m, " Aligned,");
1188 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1189 seq_puts(m, " Partition Aligned,");
1190 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1191 seq_puts(m, " SSD,");
1192 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1193 seq_puts(m, " TRIM-support,");
1194
769ee6a4 1195 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
e0386e44 1196 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
af6a12ea
SF		 1197 if (tcon->perf_sector_size)
1198 seq_printf(m, "\tOptimal sector size: 0x%x",
1199 tcon->perf_sector_size);
e0386e44 1200 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
769ee6a4
SF		 1201}
1202
d60622eb
PS		 1203static void
1204smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1205{
d60622eb
PS		 1206 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1207 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1995d28f
SF		 1208
1209 /*
1210 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1211 * totals (requests sent) since those SMBs are per-session not per tcon
1212 */
52ce1ac4
SF		 1213 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1214 (long long)(tcon->bytes_read),
1215 (long long)(tcon->bytes_written));
fae8044c
SF		 1216 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1217 atomic_read(&tcon->num_local_opens),
1218 atomic_read(&tcon->num_remote_opens));
1995d28f 1219 seq_printf(m, "\nTreeConnects: %d total %d failed",
d60622eb
PS		 1220 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1221 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1995d28f 1222 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
d60622eb
PS		 1223 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1224 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1995d28f 1225 seq_printf(m, "\nCreates: %d total %d failed",
d60622eb
PS		 1226 atomic_read(&sent[SMB2_CREATE_HE]),
1227 atomic_read(&failed[SMB2_CREATE_HE]));
1995d28f 1228 seq_printf(m, "\nCloses: %d total %d failed",
d60622eb
PS		 1229 atomic_read(&sent[SMB2_CLOSE_HE]),
1230 atomic_read(&failed[SMB2_CLOSE_HE]));
1995d28f 1231 seq_printf(m, "\nFlushes: %d total %d failed",
d60622eb
PS		 1232 atomic_read(&sent[SMB2_FLUSH_HE]),
1233 atomic_read(&failed[SMB2_FLUSH_HE]));
1995d28f 1234 seq_printf(m, "\nReads: %d total %d failed",
d60622eb
PS		 1235 atomic_read(&sent[SMB2_READ_HE]),
1236 atomic_read(&failed[SMB2_READ_HE]));
1995d28f 1237 seq_printf(m, "\nWrites: %d total %d failed",
d60622eb
PS		 1238 atomic_read(&sent[SMB2_WRITE_HE]),
1239 atomic_read(&failed[SMB2_WRITE_HE]));
1995d28f 1240 seq_printf(m, "\nLocks: %d total %d failed",
d60622eb
PS		 1241 atomic_read(&sent[SMB2_LOCK_HE]),
1242 atomic_read(&failed[SMB2_LOCK_HE]));
1995d28f 1243 seq_printf(m, "\nIOCTLs: %d total %d failed",
d60622eb
PS		 1244 atomic_read(&sent[SMB2_IOCTL_HE]),
1245 atomic_read(&failed[SMB2_IOCTL_HE]));
1995d28f 1246 seq_printf(m, "\nQueryDirectories: %d total %d failed",
d60622eb
PS		 1247 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1248 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1995d28f 1249 seq_printf(m, "\nChangeNotifies: %d total %d failed",
d60622eb
PS		 1250 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1251 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1995d28f 1252 seq_printf(m, "\nQueryInfos: %d total %d failed",
d60622eb
PS		 1253 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1254 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1995d28f 1255 seq_printf(m, "\nSetInfos: %d total %d failed",
d60622eb
PS		 1256 atomic_read(&sent[SMB2_SET_INFO_HE]),
1257 atomic_read(&failed[SMB2_SET_INFO_HE]));
1258 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1259 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1260 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
d60622eb
PS		 1261}
1262
f0df737e
PS		 1263static void
1264smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1265{
2b0143b5 1266 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
53ef1016
PS		 1267 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1268
f0df737e
PS		 1269 cfile->fid.persistent_fid = fid->persistent_fid;
1270 cfile->fid.volatile_fid = fid->volatile_fid;
dfe33f9a
SF		 1271#ifdef CONFIG_CIFS_DEBUG2
1272 cfile->fid.mid = fid->mid;
1273#endif /* CIFS_DEBUG2 */
42873b0a
PS		 1274 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1275 &fid->purge_cache);
18cceb6a 1276 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
94f87371 1277 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
f0df737e
PS		 1278}
1279
760ad0ca 1280static void
f0df737e
PS		 1281smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1282 struct cifs_fid *fid)
1283{
760ad0ca 1284 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
f0df737e
PS		 1285}
1286
41c1358e
SF		 1287static int
1288SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1289 u64 persistent_fid, u64 volatile_fid,
1290 struct copychunk_ioctl *pcchunk)
1291{
1292 int rc;
1293 unsigned int ret_data_len;
1294 struct resume_key_req *res_key;
1295
1296 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1297 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
153322f7 1298 NULL, 0 /* no input */, CIFSMaxBufSize,
41c1358e
SF		 1299 (char **)&res_key, &ret_data_len);
1300
1301 if (rc) {
1302 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1303 goto req_res_key_exit;
1304 }
1305 if (ret_data_len < sizeof(struct resume_key_req)) {
1306 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1307 rc = -EINVAL;
1308 goto req_res_key_exit;
1309 }
1310 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1311
1312req_res_key_exit:
1313 kfree(res_key);
1314 return rc;
1315}
1316
f5b05d62
RS		 1317static int
1318smb2_ioctl_query_info(const unsigned int xid,
8d8b26e5
RS		 1319 struct cifs_tcon *tcon,
1320 __le16 *path, int is_dir,
f5b05d62
RS		 1321 unsigned long p)
1322{
f5b05d62
RS		 1323 struct cifs_ses *ses = tcon->ses;
1324 char __user *arg = (char __user *)p;
1325 struct smb_query_info qi;
1326 struct smb_query_info __user *pqi;
1327 int rc = 0;
1328 int flags = 0;
f5778c39
RS		 1329 struct smb2_query_info_rsp *qi_rsp = NULL;
1330 struct smb2_ioctl_rsp *io_rsp = NULL;
8d8b26e5
RS		 1331 void *buffer = NULL;
1332 struct smb_rqst rqst[3];
1333 int resp_buftype[3];
1334 struct kvec rsp_iov[3];
1335 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1336 struct cifs_open_parms oparms;
1337 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1338 struct cifs_fid fid;
1339 struct kvec qi_iov[1];
f5778c39 1340 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
8d8b26e5
RS		 1341 struct kvec close_iov[1];
1342
1343 memset(rqst, 0, sizeof(rqst));
1344 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1345 memset(rsp_iov, 0, sizeof(rsp_iov));
f5b05d62
RS		 1346
1347 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1348 return -EFAULT;
1349
1350 if (qi.output_buffer_length > 1024)
1351 return -EINVAL;
1352
1353 if (!ses || !(ses->server))
1354 return -EIO;
1355
1356 if (smb3_encryption_required(tcon))
1357 flags |= CIFS_TRANSFORM_REQ;
1358
1359 buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL);
1360 if (buffer == NULL)
1361 return -ENOMEM;
1362
1363 if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
1364 qi.output_buffer_length)) {
8d8b26e5
RS		 1365 rc = -EFAULT;
1366 goto iqinf_exit;
f5b05d62
RS		 1367 }
1368
8d8b26e5
RS		 1369 /* Open */
1370 memset(&open_iov, 0, sizeof(open_iov));
1371 rqst[0].rq_iov = open_iov;
1372 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1373
1374 memset(&oparms, 0, sizeof(oparms));
1375 oparms.tcon = tcon;
1376 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1377 oparms.disposition = FILE_OPEN;
1378 if (is_dir)
1379 oparms.create_options = CREATE_NOT_FILE;
1380 else
1381 oparms.create_options = CREATE_NOT_DIR;
1382 oparms.fid = &fid;
1383 oparms.reconnect = false;
1384
1385 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1386 if (rc)
1387 goto iqinf_exit;
e77fe73c 1388 smb2_set_next_command(tcon, &rqst[0]);
8d8b26e5
RS		 1389
1390 /* Query */
31ba4331
SF		 1391 if (qi.flags & PASSTHRU_FSCTL) {
1392 /* Can eventually relax perm check since server enforces too */
1393 if (!capable(CAP_SYS_ADMIN))
1394 rc = -EPERM;
f5778c39
RS		 1395 else {
1396 memset(&io_iov, 0, sizeof(io_iov));
1397 rqst[1].rq_iov = io_iov;
1398 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1399
1400 rc = SMB2_ioctl_init(tcon, &rqst[1],
1401 COMPOUND_FID, COMPOUND_FID,
1402 qi.info_type, true, NULL,
153322f7 1403 0, CIFSMaxBufSize);
f5778c39 1404 }
31ba4331
SF		 1405 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1406 memset(&qi_iov, 0, sizeof(qi_iov));
1407 rqst[1].rq_iov = qi_iov;
1408 rqst[1].rq_nvec = 1;
1409
1410 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1411 COMPOUND_FID, qi.file_info_class,
1412 qi.info_type, qi.additional_information,
f5b05d62
RS		 1413 qi.input_buffer_length,
1414 qi.output_buffer_length, buffer);
31ba4331
SF		 1415 } else { /* unknown flags */
1416 cifs_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
1417 rc = -EINVAL;
1418 }
1419
f5b05d62
RS		 1420 if (rc)
1421 goto iqinf_exit;
e77fe73c 1422 smb2_set_next_command(tcon, &rqst[1]);
8d8b26e5
RS		 1423 smb2_set_related(&rqst[1]);
1424
1425 /* Close */
1426 memset(&close_iov, 0, sizeof(close_iov));
1427 rqst[2].rq_iov = close_iov;
1428 rqst[2].rq_nvec = 1;
f5b05d62 1429
8d8b26e5 1430 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
f5b05d62
RS		 1431 if (rc)
1432 goto iqinf_exit;
8d8b26e5 1433 smb2_set_related(&rqst[2]);
f5b05d62 1434
8d8b26e5
RS		 1435 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1436 resp_buftype, rsp_iov);
1437 if (rc)
1438 goto iqinf_exit;
f5778c39
RS		 1439 if (qi.flags & PASSTHRU_FSCTL) {
1440 pqi = (struct smb_query_info __user *)arg;
1441 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1442 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1443 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1444 if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1445 sizeof(qi.input_buffer_length))) {
1446 rc = -EFAULT;
1447 goto iqinf_exit;
1448 }
1449 if (copy_to_user(pqi + 1, &io_rsp[1], qi.input_buffer_length)) {
1450 rc = -EFAULT;
1451 goto iqinf_exit;
1452 }
1453 } else {
1454 pqi = (struct smb_query_info __user *)arg;
1455 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1456 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1457 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1458 if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1459 sizeof(qi.input_buffer_length))) {
1460 rc = -EFAULT;
1461 goto iqinf_exit;
1462 }
1463 if (copy_to_user(pqi + 1, qi_rsp->Buffer, qi.input_buffer_length)) {
1464 rc = -EFAULT;
1465 goto iqinf_exit;
1466 }
f5b05d62
RS		 1467 }
1468
1469 iqinf_exit:
8d8b26e5
RS		 1470 kfree(buffer);
1471 SMB2_open_free(&rqst[0]);
f5778c39
RS		 1472 if (qi.flags & PASSTHRU_FSCTL)
1473 SMB2_ioctl_free(&rqst[1]);
1474 else
1475 SMB2_query_info_free(&rqst[1]);
1476
8d8b26e5
RS		 1477 SMB2_close_free(&rqst[2]);
1478 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1479 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1480 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
f5b05d62
RS		 1481 return rc;
1482}
1483
620d8745 1484static ssize_t
312bbc59 1485smb2_copychunk_range(const unsigned int xid,
41c1358e
SF		 1486 struct cifsFileInfo *srcfile,
1487 struct cifsFileInfo *trgtfile, u64 src_off,
1488 u64 len, u64 dest_off)
1489{
1490 int rc;
1491 unsigned int ret_data_len;
1492 struct copychunk_ioctl *pcchunk;
9bf0c9cd
SF		 1493 struct copychunk_ioctl_rsp *retbuf = NULL;
1494 struct cifs_tcon *tcon;
1495 int chunks_copied = 0;
1496 bool chunk_sizes_updated = false;
620d8745 1497 ssize_t bytes_written, total_bytes_written = 0;
41c1358e
SF		 1498
1499 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1500
1501 if (pcchunk == NULL)
1502 return -ENOMEM;
1503
312bbc59 1504 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
41c1358e
SF		 1505 /* Request a key from the server to identify the source of the copy */
1506 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1507 srcfile->fid.persistent_fid,
1508 srcfile->fid.volatile_fid, pcchunk);
1509
1510 /* Note: request_res_key sets res_key null only if rc !=0 */
1511 if (rc)
9bf0c9cd 1512 goto cchunk_out;
41c1358e
SF		 1513
1514 /* For now array only one chunk long, will make more flexible later */
bc09d141 1515 pcchunk->ChunkCount = cpu_to_le32(1);
41c1358e 1516 pcchunk->Reserved = 0;
41c1358e
SF		 1517 pcchunk->Reserved2 = 0;
1518
9bf0c9cd 1519 tcon = tlink_tcon(trgtfile->tlink);
41c1358e 1520
9bf0c9cd
SF		 1521 while (len > 0) {
1522 pcchunk->SourceOffset = cpu_to_le64(src_off);
1523 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1524 pcchunk->Length =
1525 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
41c1358e 1526
9bf0c9cd
SF		 1527 /* Request server copy to target from src identified by key */
1528 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1529 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
63a83b86 1530 true /* is_fsctl */, (char *)pcchunk,
153322f7
SF		 1531 sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1532 (char **)&retbuf, &ret_data_len);
9bf0c9cd
SF		 1533 if (rc == 0) {
1534 if (ret_data_len !=
1535 sizeof(struct copychunk_ioctl_rsp)) {
1536 cifs_dbg(VFS, "invalid cchunk response size\n");
1537 rc = -EIO;
1538 goto cchunk_out;
1539 }
1540 if (retbuf->TotalBytesWritten == 0) {
1541 cifs_dbg(FYI, "no bytes copied\n");
1542 rc = -EIO;
1543 goto cchunk_out;
1544 }
1545 /*
1546 * Check if server claimed to write more than we asked
1547 */
1548 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1549 le32_to_cpu(pcchunk->Length)) {
1550 cifs_dbg(VFS, "invalid copy chunk response\n");
1551 rc = -EIO;
1552 goto cchunk_out;
1553 }
1554 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1555 cifs_dbg(VFS, "invalid num chunks written\n");
1556 rc = -EIO;
1557 goto cchunk_out;
1558 }
1559 chunks_copied++;
1560
620d8745
SP		 1561 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1562 src_off += bytes_written;
1563 dest_off += bytes_written;
1564 len -= bytes_written;
1565 total_bytes_written += bytes_written;
9bf0c9cd 1566
620d8745 1567 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
9bf0c9cd
SF		 1568 le32_to_cpu(retbuf->ChunksWritten),
1569 le32_to_cpu(retbuf->ChunkBytesWritten),
620d8745 1570 bytes_written);
9bf0c9cd
SF		 1571 } else if (rc == -EINVAL) {
1572 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1573 goto cchunk_out;
1574
1575 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1576 le32_to_cpu(retbuf->ChunksWritten),
1577 le32_to_cpu(retbuf->ChunkBytesWritten),
1578 le32_to_cpu(retbuf->TotalBytesWritten));
1579
1580 /*
1581 * Check if this is the first request using these sizes,
1582 * (ie check if copy succeed once with original sizes
1583 * and check if the server gave us different sizes after
1584 * we already updated max sizes on previous request).
1585 * if not then why is the server returning an error now
1586 */
1587 if ((chunks_copied != 0) || chunk_sizes_updated)
1588 goto cchunk_out;
1589
1590 /* Check that server is not asking us to grow size */
1591 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1592 tcon->max_bytes_chunk)
1593 tcon->max_bytes_chunk =
1594 le32_to_cpu(retbuf->ChunkBytesWritten);
1595 else
1596 goto cchunk_out; /* server gave us bogus size */
1597
1598 /* No need to change MaxChunks since already set to 1 */
1599 chunk_sizes_updated = true;
2477bc58
SP		 1600 } else
1601 goto cchunk_out;
9bf0c9cd 1602 }
41c1358e 1603
9bf0c9cd 1604cchunk_out:
41c1358e 1605 kfree(pcchunk);
24df1483 1606 kfree(retbuf);
620d8745
SP		 1607 if (rc)
1608 return rc;
1609 else
1610 return total_bytes_written;
41c1358e
SF		 1611}
1612
7a5cfb19
PS		 1613static int
1614smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1615 struct cifs_fid *fid)
1616{
1617 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1618}
1619
09a4707e
PS		 1620static unsigned int
1621smb2_read_data_offset(char *buf)
1622{
1623 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1624 return rsp->DataOffset;
1625}
1626
1627static unsigned int
74dcf418 1628smb2_read_data_length(char *buf, bool in_remaining)
09a4707e
PS		 1629{
1630 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
74dcf418
LL		 1631
1632 if (in_remaining)
1633 return le32_to_cpu(rsp->DataRemaining);
1634
09a4707e
PS		 1635 return le32_to_cpu(rsp->DataLength);
1636}
1637
d8e05039
PS		 1638
1639static int
db8b631d 1640smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
d8e05039
PS		 1641 struct cifs_io_parms *parms, unsigned int *bytes_read,
1642 char **buf, int *buf_type)
1643{
db8b631d
SF		 1644 parms->persistent_fid = pfid->persistent_fid;
1645 parms->volatile_fid = pfid->volatile_fid;
d8e05039
PS		 1646 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1647}
1648
009d3443 1649static int
db8b631d 1650smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
009d3443
PS		 1651 struct cifs_io_parms *parms, unsigned int *written,
1652 struct kvec *iov, unsigned long nr_segs)
1653{
1654
db8b631d
SF		 1655 parms->persistent_fid = pfid->persistent_fid;
1656 parms->volatile_fid = pfid->volatile_fid;
009d3443
PS		 1657 return SMB2_write(xid, parms, written, iov, nr_segs);
1658}
1659
d43cc793
SF		 1660/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1661static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1662 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1663{
1664 struct cifsInodeInfo *cifsi;
1665 int rc;
1666
1667 cifsi = CIFS_I(inode);
1668
1669 /* if file already sparse don't bother setting sparse again */
1670 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1671 return true; /* already sparse */
1672
1673 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1674 return true; /* already not sparse */
1675
1676 /*
1677 * Can't check for sparse support on share the usual way via the
1678 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1679 * since Samba server doesn't set the flag on the share, yet
1680 * supports the set sparse FSCTL and returns sparse correctly
1681 * in the file attributes. If we fail setting sparse though we
1682 * mark that server does not support sparse files for this share
1683 * to avoid repeatedly sending the unsupported fsctl to server
1684 * if the file is repeatedly extended.
1685 */
1686 if (tcon->broken_sparse_sup)
1687 return false;
1688
1689 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1690 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
63a83b86 1691 true /* is_fctl */,
153322f7 1692 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
d43cc793
SF		 1693 if (rc) {
1694 tcon->broken_sparse_sup = true;
1695 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1696 return false;
1697 }
1698
1699 if (setsparse)
1700 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1701 else
1702 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1703
1704 return true;
1705}
1706
c839ff24
PS		 1707static int
1708smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1709 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1710{
1711 __le64 eof = cpu_to_le64(size);
3d1a3745
SF		 1712 struct inode *inode;
1713
1714 /*
1715 * If extending file more than one page make sparse. Many Linux fs
1716 * make files sparse by default when extending via ftruncate
1717 */
2b0143b5 1718 inode = d_inode(cfile->dentry);
3d1a3745
SF		 1719
1720 if (!set_alloc && (size > inode->i_size + 8192)) {
3d1a3745 1721 __u8 set_sparse = 1;
d43cc793
SF		 1722
1723 /* whether set sparse succeeds or not, extend the file */
1724 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
3d1a3745
SF		 1725 }
1726
c839ff24 1727 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3764cbd1 1728 cfile->fid.volatile_fid, cfile->pid, &eof);
c839ff24
PS		 1729}
1730
02b16665
SF		 1731static int
1732smb2_duplicate_extents(const unsigned int xid,
1733 struct cifsFileInfo *srcfile,
1734 struct cifsFileInfo *trgtfile, u64 src_off,
1735 u64 len, u64 dest_off)
1736{
1737 int rc;
1738 unsigned int ret_data_len;
02b16665
SF		 1739 struct duplicate_extents_to_file dup_ext_buf;
1740 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1741
1742 /* server fileays advertise duplicate extent support with this flag */
1743 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1744 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1745 return -EOPNOTSUPP;
1746
1747 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1748 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1749 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1750 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1751 dup_ext_buf.ByteCount = cpu_to_le64(len);
1752 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1753 src_off, dest_off, len);
1754
1755 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1756 if (rc)
1757 goto duplicate_extents_out;
1758
1759 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1760 trgtfile->fid.volatile_fid,
1761 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
63a83b86 1762 true /* is_fsctl */,
51146625 1763 (char *)&dup_ext_buf,
02b16665 1764 sizeof(struct duplicate_extents_to_file),
153322f7 1765 CIFSMaxBufSize, NULL,
02b16665
SF		 1766 &ret_data_len);
1767
1768 if (ret_data_len > 0)
1769 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1770
1771duplicate_extents_out:
1772 return rc;
1773}
02b16665 1774
64a5cfa6
SF		 1775static int
1776smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1777 struct cifsFileInfo *cfile)
1778{
1779 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1780 cfile->fid.volatile_fid);
1781}
1782
b3152e2c
SF		 1783static int
1784smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1785 struct cifsFileInfo *cfile)
1786{
1787 struct fsctl_set_integrity_information_req integr_info;
b3152e2c
SF		 1788 unsigned int ret_data_len;
1789
1790 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1791 integr_info.Flags = 0;
1792 integr_info.Reserved = 0;
1793
1794 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1795 cfile->fid.volatile_fid,
1796 FSCTL_SET_INTEGRITY_INFORMATION,
63a83b86 1797 true /* is_fsctl */,
51146625 1798 (char *)&integr_info,
b3152e2c 1799 sizeof(struct fsctl_set_integrity_information_req),
153322f7 1800 CIFSMaxBufSize, NULL,
b3152e2c
SF		 1801 &ret_data_len);
1802
1803}
1804
e02789a5
SF		 1805/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1806#define GMT_TOKEN_SIZE 50
1807
153322f7
SF		 1808#define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1809
e02789a5
SF		 1810/*
1811 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1812 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1813 */
834170c8
SF		 1814static int
1815smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1816 struct cifsFileInfo *cfile, void __user *ioc_buf)
1817{
1818 char *retbuf = NULL;
1819 unsigned int ret_data_len = 0;
1820 int rc;
153322f7 1821 u32 max_response_size;
834170c8
SF		 1822 struct smb_snapshot_array snapshot_in;
1823
153322f7
SF		 1824 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
1825 return -EFAULT;
1826
1827 /*
1828 * Note that for snapshot queries that servers like Azure expect that
1829 * the first query be minimal size (and just used to get the number/size
1830 * of previous versions) so response size must be specified as EXACTLY
1831 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1832 * of eight bytes.
1833 */
1834 if (ret_data_len == 0)
1835 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
1836 else
1837 max_response_size = CIFSMaxBufSize;
1838
834170c8
SF		 1839 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1840 cfile->fid.volatile_fid,
1841 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
63a83b86 1842 true /* is_fsctl */,
153322f7 1843 NULL, 0 /* no input data */, max_response_size,
834170c8
SF		 1844 (char **)&retbuf,
1845 &ret_data_len);
1846 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1847 rc, ret_data_len);
1848 if (rc)
1849 return rc;
1850
1851 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1852 /* Fixup buffer */
1853 if (copy_from_user(&snapshot_in, ioc_buf,
1854 sizeof(struct smb_snapshot_array))) {
1855 rc = -EFAULT;
1856 kfree(retbuf);
1857 return rc;
1858 }
834170c8 1859
e02789a5
SF		 1860 /*
1861 * Check for min size, ie not large enough to fit even one GMT
1862 * token (snapshot). On the first ioctl some users may pass in
1863 * smaller size (or zero) to simply get the size of the array
1864 * so the user space caller can allocate sufficient memory
1865 * and retry the ioctl again with larger array size sufficient
1866 * to hold all of the snapshot GMT tokens on the second try.
1867 */
1868 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
1869 ret_data_len = sizeof(struct smb_snapshot_array);
1870
1871 /*
1872 * We return struct SRV_SNAPSHOT_ARRAY, followed by
1873 * the snapshot array (of 50 byte GMT tokens) each
1874 * representing an available previous version of the data
1875 */
1876 if (ret_data_len > (snapshot_in.snapshot_array_size +
1877 sizeof(struct smb_snapshot_array)))
1878 ret_data_len = snapshot_in.snapshot_array_size +
1879 sizeof(struct smb_snapshot_array);
834170c8
SF		 1880
1881 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1882 rc = -EFAULT;
1883 }
1884
1885 kfree(retbuf);
1886 return rc;
1887}
1888
d324f08d
PS		 1889static int
1890smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1891 const char *path, struct cifs_sb_info *cifs_sb,
1892 struct cifs_fid *fid, __u16 search_flags,
1893 struct cifs_search_info *srch_inf)
1894{
1895 __le16 *utf16_path;
1896 int rc;
2e44b288 1897 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047 1898 struct cifs_open_parms oparms;
d324f08d
PS		 1899
1900 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1901 if (!utf16_path)
1902 return -ENOMEM;
1903
064f6047
PS		 1904 oparms.tcon = tcon;
1905 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1906 oparms.disposition = FILE_OPEN;
5e19697b
SF		 1907 if (backup_cred(cifs_sb))
1908 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1909 else
1910 oparms.create_options = 0;
064f6047 1911 oparms.fid = fid;
9cbc0b73 1912 oparms.reconnect = false;
064f6047 1913
9d874c36 1914 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
d324f08d
PS		 1915 kfree(utf16_path);
1916 if (rc) {
dcd87838 1917 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
d324f08d
PS		 1918 return rc;
1919 }
1920
1921 srch_inf->entries_in_buffer = 0;
0595751f 1922 srch_inf->index_of_last_entry = 2;
d324f08d 1923
064f6047
PS		 1924 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1925 fid->volatile_fid, 0, srch_inf);
d324f08d 1926 if (rc) {
dcd87838 1927 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
064f6047 1928 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
d324f08d
PS		 1929 }
1930 return rc;
1931}
1932
1933static int
1934smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1935 struct cifs_fid *fid, __u16 search_flags,
1936 struct cifs_search_info *srch_inf)
1937{
1938 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1939 fid->volatile_fid, 0, srch_inf);
1940}
1941
1942static int
1943smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1944 struct cifs_fid *fid)
1945{
1946 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1947}
1948
2e44b288
PS		 1949/*
1950* If we negotiate SMB2 protocol and get STATUS_PENDING - update
1951* the number of credits and return true. Otherwise - return false.
1952*/
1953static bool
66265f13 1954smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2e44b288 1955{
49f466bd 1956 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2e44b288 1957
31473fc4 1958 if (shdr->Status != STATUS_PENDING)
2e44b288
PS		 1959 return false;
1960
66265f13 1961 if (shdr->CreditRequest) {
2e44b288 1962 spin_lock(&server->req_lock);
31473fc4 1963 server->credits += le16_to_cpu(shdr->CreditRequest);
2e44b288
PS		 1964 spin_unlock(&server->req_lock);
1965 wake_up(&server->request_q);
1966 }
1967
1968 return true;
1969}
1970
511c54a2
PS		 1971static bool
1972smb2_is_session_expired(char *buf)
1973{
49f466bd 1974 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
511c54a2 1975
d81243c6
MS		 1976 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
1977 shdr->Status != STATUS_USER_SESSION_DELETED)
511c54a2
PS		 1978 return false;
1979
e68a932b
SF		 1980 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
1981 le16_to_cpu(shdr->Command),
1982 le64_to_cpu(shdr->MessageId));
d81243c6 1983 cifs_dbg(FYI, "Session expired or deleted\n");
e68a932b 1984
511c54a2
PS		 1985 return true;
1986}
1987
983c88a4
PS		 1988static int
1989smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1990 struct cifsInodeInfo *cinode)
1991{
0822f514
PS		 1992 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1993 return SMB2_lease_break(0, tcon, cinode->lease_key,
1994 smb2_get_lease_state(cinode));
1995
983c88a4
PS		 1996 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1997 fid->volatile_fid,
18cceb6a 1998 CIFS_CACHE_READ(cinode) ? 1 : 0);
983c88a4
PS		 1999}
2000
c5a5f38f 2001void
730928c8
RS		 2002smb2_set_related(struct smb_rqst *rqst)
2003{
2004 struct smb2_sync_hdr *shdr;
2005
2006 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2007 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2008}
2009
2010char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2011
c5a5f38f 2012void
e77fe73c 2013smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
730928c8
RS		 2014{
2015 struct smb2_sync_hdr *shdr;
e77fe73c
RS		 2016 struct cifs_ses *ses = tcon->ses;
2017 struct TCP_Server_Info *server = ses->server;
730928c8 2018 unsigned long len = smb_rqst_len(server, rqst);
e77fe73c 2019 int i, num_padding;
730928c8
RS		 2020
2021 /* SMB headers in a compound are 8 byte aligned. */
e77fe73c
RS		 2022
2023 /* No padding needed */
2024 if (!(len & 7))
2025 goto finished;
2026
2027 num_padding = 8 - (len & 7);
2028 if (!smb3_encryption_required(tcon)) {
2029 /*
2030 * If we do not have encryption then we can just add an extra
2031 * iov for the padding.
2032 */
2033 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2034 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2035 rqst->rq_nvec++;
2036 len += num_padding;
2037 } else {
2038 /*
2039 * We can not add a small padding iov for the encryption case
2040 * because the encryption framework can not handle the padding
2041 * iovs.
2042 * We have to flatten this into a single buffer and add
2043 * the padding to it.
2044 */
2045 for (i = 1; i < rqst->rq_nvec; i++) {
2046 memcpy(rqst->rq_iov[0].iov_base +
2047 rqst->rq_iov[0].iov_len,
2048 rqst->rq_iov[i].iov_base,
2049 rqst->rq_iov[i].iov_len);
2050 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
271b9c0c 2051 }
e77fe73c
RS		 2052 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2053 0, num_padding);
2054 rqst->rq_iov[0].iov_len += num_padding;
2055 len += num_padding;
2056 rqst->rq_nvec = 1;
730928c8
RS		 2057 }
2058
e77fe73c 2059 finished:
730928c8
RS		 2060 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2061 shdr->NextCommand = cpu_to_le32(len);
2062}
2063
07d3b2e4
RS		 2064/*
2065 * Passes the query info response back to the caller on success.
2066 * Caller need to free this with free_rsp_buf().
2067 */
f9793b6f 2068int
07d3b2e4
RS		 2069smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2070 __le16 *utf16_path, u32 desired_access,
2071 u32 class, u32 type, u32 output_len,
f9793b6f
RS		 2072 struct kvec *rsp, int *buftype,
2073 struct cifs_sb_info *cifs_sb)
6fc05c25 2074{
07d3b2e4 2075 struct cifs_ses *ses = tcon->ses;
07d3b2e4 2076 int flags = 0;
730928c8
RS		 2077 struct smb_rqst rqst[3];
2078 int resp_buftype[3];
2079 struct kvec rsp_iov[3];
4d8dfafc 2080 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
730928c8
RS		 2081 struct kvec qi_iov[1];
2082 struct kvec close_iov[1];
6fc05c25 2083 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 2084 struct cifs_open_parms oparms;
2085 struct cifs_fid fid;
730928c8
RS		 2086 int rc;
2087
2088 if (smb3_encryption_required(tcon))
2089 flags |= CIFS_TRANSFORM_REQ;
2090
2091 memset(rqst, 0, sizeof(rqst));
c5a5f38f 2092 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
730928c8
RS		 2093 memset(rsp_iov, 0, sizeof(rsp_iov));
2094
2095 memset(&open_iov, 0, sizeof(open_iov));
2096 rqst[0].rq_iov = open_iov;
4d8dfafc 2097 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
064f6047
PS		 2098
2099 oparms.tcon = tcon;
07d3b2e4 2100 oparms.desired_access = desired_access;
064f6047 2101 oparms.disposition = FILE_OPEN;
f9793b6f
RS		 2102 if (cifs_sb && backup_cred(cifs_sb))
2103 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2104 else
2105 oparms.create_options = 0;
064f6047 2106 oparms.fid = &fid;
9cbc0b73 2107 oparms.reconnect = false;
6fc05c25 2108
07d3b2e4 2109 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
6fc05c25 2110 if (rc)
07d3b2e4 2111 goto qic_exit;
e77fe73c 2112 smb2_set_next_command(tcon, &rqst[0]);
730928c8
RS		 2113
2114 memset(&qi_iov, 0, sizeof(qi_iov));
2115 rqst[1].rq_iov = qi_iov;
2116 rqst[1].rq_nvec = 1;
2117
2118 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
07d3b2e4
RS		 2119 class, type, 0,
2120 output_len, 0,
f5b05d62 2121 NULL);
730928c8 2122 if (rc)
07d3b2e4 2123 goto qic_exit;
e77fe73c 2124 smb2_set_next_command(tcon, &rqst[1]);
730928c8
RS		 2125 smb2_set_related(&rqst[1]);
2126
2127 memset(&close_iov, 0, sizeof(close_iov));
2128 rqst[2].rq_iov = close_iov;
2129 rqst[2].rq_nvec = 1;
2130
2131 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
2132 if (rc)
07d3b2e4 2133 goto qic_exit;
730928c8
RS		 2134 smb2_set_related(&rqst[2]);
2135
2136 rc = compound_send_recv(xid, ses, flags, 3, rqst,
2137 resp_buftype, rsp_iov);
f9793b6f
RS		 2138 if (rc) {
2139 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
07d3b2e4 2140 goto qic_exit;
f9793b6f 2141 }
07d3b2e4
RS		 2142 *rsp = rsp_iov[1];
2143 *buftype = resp_buftype[1];
2144
2145 qic_exit:
2146 SMB2_open_free(&rqst[0]);
2147 SMB2_query_info_free(&rqst[1]);
2148 SMB2_close_free(&rqst[2]);
2149 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2150 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2151 return rc;
2152}
2153
2154static int
2155smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2156 struct kstatfs *buf)
2157{
2158 struct smb2_query_info_rsp *rsp;
2159 struct smb2_fs_full_size_info *info = NULL;
2160 __le16 utf16_path = 0; /* Null - open root of share */
2161 struct kvec rsp_iov = {NULL, 0};
2162 int buftype = CIFS_NO_BUFFER;
2163 int rc;
2164
2165
2166 rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2167 FILE_READ_ATTRIBUTES,
2168 FS_FULL_SIZE_INFORMATION,
2169 SMB2_O_INFO_FILESYSTEM,
2170 sizeof(struct smb2_fs_full_size_info),
f9793b6f 2171 &rsp_iov, &buftype, NULL);
730928c8
RS		 2172 if (rc)
2173 goto qfs_exit;
2174
07d3b2e4 2175 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 2176 buf->f_type = SMB2_MAGIC_NUMBER;
730928c8
RS		 2177 info = (struct smb2_fs_full_size_info *)(
2178 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2179 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2180 le32_to_cpu(rsp->OutputBufferLength),
07d3b2e4 2181 &rsp_iov,
730928c8
RS		 2182 sizeof(struct smb2_fs_full_size_info));
2183 if (!rc)
2184 smb2_copy_fs_info_to_kstatfs(info, buf);
2185
2186qfs_exit:
07d3b2e4 2187 free_rsp_buf(buftype, rsp_iov.iov_base);
6fc05c25
PS		 2188 return rc;
2189}
2190
2d304217
SF		 2191static int
2192smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2193 struct kstatfs *buf)
2194{
2195 int rc;
2196 __le16 srch_path = 0; /* Null - open root of share */
2197 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2198 struct cifs_open_parms oparms;
2199 struct cifs_fid fid;
2200
2201 if (!tcon->posix_extensions)
2202 return smb2_queryfs(xid, tcon, buf);
2203
2204 oparms.tcon = tcon;
2205 oparms.desired_access = FILE_READ_ATTRIBUTES;
2206 oparms.disposition = FILE_OPEN;
2207 oparms.create_options = 0;
2208 oparms.fid = &fid;
2209 oparms.reconnect = false;
2210
2211 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2212 if (rc)
2213 return rc;
2214
2215 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2216 fid.volatile_fid, buf);
2217 buf->f_type = SMB2_MAGIC_NUMBER;
2218 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2219 return rc;
2220}
2d304217 2221
027e8eec
PS		 2222static bool
2223smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2224{
2225 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2226 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2227}
2228
f7ba7fe6
PS		 2229static int
2230smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2231 __u64 length, __u32 type, int lock, int unlock, bool wait)
2232{
2233 if (unlock && !lock)
2234 type = SMB2_LOCKFLAG_UNLOCK;
2235 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2236 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2237 current->tgid, length, offset, type, wait);
2238}
2239
b8c32dbb
PS		 2240static void
2241smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2242{
2243 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2244}
2245
2246static void
2247smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2248{
2249 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2250}
2251
2252static void
2253smb2_new_lease_key(struct cifs_fid *fid)
2254{
fa70b87c 2255 generate_random_uuid(fid->lease_key);
b8c32dbb
PS		 2256}
2257
9d49640a
AA		 2258static int
2259smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2260 const char *search_name,
2261 struct dfs_info3_param **target_nodes,
2262 unsigned int *num_of_nodes,
2263 const struct nls_table *nls_codepage, int remap)
2264{
2265 int rc;
2266 __le16 *utf16_path = NULL;
2267 int utf16_path_len = 0;
2268 struct cifs_tcon *tcon;
2269 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2270 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2271 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2272
2273 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
2274
2275 /*
63a83b86 2276 * Try to use the IPC tcon, otherwise just use any
9d49640a 2277 */
63a83b86
AA		 2278 tcon = ses->tcon_ipc;
2279 if (tcon == NULL) {
2280 spin_lock(&cifs_tcp_ses_lock);
2281 tcon = list_first_entry_or_null(&ses->tcon_list,
2282 struct cifs_tcon,
2283 tcon_list);
2284 if (tcon)
2285 tcon->tc_count++;
2286 spin_unlock(&cifs_tcp_ses_lock);
2287 }
2288
2289 if (tcon == NULL) {
9d49640a
AA		 2290 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2291 ses);
2292 rc = -ENOTCONN;
2293 goto out;
2294 }
2295
2296 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2297 &utf16_path_len,
2298 nls_codepage, remap);
2299 if (!utf16_path) {
2300 rc = -ENOMEM;
2301 goto out;
2302 }
2303
2304 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2305 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2306 if (!dfs_req) {
2307 rc = -ENOMEM;
2308 goto out;
2309 }
2310
2311 /* Highest DFS referral version understood */
2312 dfs_req->MaxReferralLevel = DFS_VERSION;
2313
2314 /* Path to resolve in an UTF-16 null-terminated string */
2315 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2316
2317 do {
9d49640a
AA		 2318 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2319 FSCTL_DFS_GET_REFERRALS,
63a83b86 2320 true /* is_fsctl */,
153322f7 2321 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
9d49640a 2322 (char **)&dfs_rsp, &dfs_rsp_size);
9d49640a
AA		 2323 } while (rc == -EAGAIN);
2324
2325 if (rc) {
2564f2ff 2326 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
5702591f 2327 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
9d49640a
AA		 2328 goto out;
2329 }
2330
2331 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2332 num_of_nodes, target_nodes,
2333 nls_codepage, remap, search_name,
2334 true /* is_unicode */);
2335 if (rc) {
2336 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
2337 goto out;
2338 }
2339
2340 out:
63a83b86
AA		 2341 if (tcon && !tcon->ipc) {
2342 /* ipc tcons are not refcounted */
9d49640a
AA		 2343 spin_lock(&cifs_tcp_ses_lock);
2344 tcon->tc_count--;
2345 spin_unlock(&cifs_tcp_ses_lock);
2346 }
2347 kfree(utf16_path);
2348 kfree(dfs_req);
2349 kfree(dfs_rsp);
2350 return rc;
2351}
7893242e
PS		 2352#define SMB2_SYMLINK_STRUCT_SIZE \
2353 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2354
b42bf888
PS		 2355static int
2356smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2357 const char *full_path, char **target_path,
2358 struct cifs_sb_info *cifs_sb)
2359{
2360 int rc;
2361 __le16 *utf16_path;
2362 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2363 struct cifs_open_parms oparms;
2364 struct cifs_fid fid;
91cb74f5 2365 struct kvec err_iov = {NULL, 0};
9d874c36
RS		 2366 struct smb2_err_rsp *err_buf = NULL;
2367 int resp_buftype;
b42bf888 2368 struct smb2_symlink_err_rsp *symlink;
7893242e
PS		 2369 unsigned int sub_len;
2370 unsigned int sub_offset;
2371 unsigned int print_len;
2372 unsigned int print_offset;
b42bf888
PS		 2373
2374 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2375
2376 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2377 if (!utf16_path)
2378 return -ENOMEM;
2379
2380 oparms.tcon = tcon;
2381 oparms.desired_access = FILE_READ_ATTRIBUTES;
2382 oparms.disposition = FILE_OPEN;
5e19697b
SF		 2383 if (backup_cred(cifs_sb))
2384 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2385 else
2386 oparms.create_options = 0;
b42bf888
PS		 2387 oparms.fid = &fid;
2388 oparms.reconnect = false;
2389
9d874c36
RS		 2390 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
2391 &resp_buftype);
e6d0fb7b
RS		 2392 if (!rc)
2393 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
0d568cd3 2394 if (!rc || !err_iov.iov_base) {
9d874c36 2395 rc = -ENOENT;
ff361fda 2396 goto free_path;
b42bf888 2397 }
7893242e 2398
91cb74f5 2399 err_buf = err_iov.iov_base;
7893242e 2400 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1fc6ad2f 2401 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
9d874c36
RS		 2402 rc = -ENOENT;
2403 goto querty_exit;
7893242e
PS		 2404 }
2405
b42bf888
PS		 2406 /* open must fail on symlink - reset rc */
2407 rc = 0;
2408 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2409 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2410 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
7893242e
PS		 2411 print_len = le16_to_cpu(symlink->PrintNameLength);
2412 print_offset = le16_to_cpu(symlink->PrintNameOffset);
2413
1fc6ad2f 2414 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
9d874c36
RS		 2415 rc = -ENOENT;
2416 goto querty_exit;
7893242e
PS		 2417 }
2418
1fc6ad2f
RS		 2419 if (err_iov.iov_len <
2420 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
9d874c36
RS		 2421 rc = -ENOENT;
2422 goto querty_exit;
7893242e
PS		 2423 }
2424
b42bf888
PS		 2425 *target_path = cifs_strndup_from_utf16(
2426 (char *)symlink->PathBuffer + sub_offset,
2427 sub_len, true, cifs_sb->local_nls);
2428 if (!(*target_path)) {
9d874c36
RS		 2429 rc = -ENOMEM;
2430 goto querty_exit;
b42bf888
PS		 2431 }
2432 convert_delimiter(*target_path, '/');
2433 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
9d874c36
RS		 2434
2435 querty_exit:
2436 free_rsp_buf(resp_buftype, err_buf);
ff361fda 2437 free_path:
b42bf888
PS		 2438 kfree(utf16_path);
2439 return rc;
2440}
2441
84908426 2442#ifdef CONFIG_CIFS_ACL
2f1afe25
SP		 2443static struct cifs_ntsd *
2444get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2445 const struct cifs_fid *cifsfid, u32 *pacllen)
2446{
2447 struct cifs_ntsd *pntsd = NULL;
2448 unsigned int xid;
2449 int rc = -EOPNOTSUPP;
2450 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2451
2452 if (IS_ERR(tlink))
2453 return ERR_CAST(tlink);
2454
2455 xid = get_xid();
2456 cifs_dbg(FYI, "trying to get acl\n");
2457
2458 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2459 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2460 free_xid(xid);
2461
2462 cifs_put_tlink(tlink);
2463
2464 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2465 if (rc)
2466 return ERR_PTR(rc);
2467 return pntsd;
2468
2469}
2470
2471static struct cifs_ntsd *
2472get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2473 const char *path, u32 *pacllen)
2474{
2475 struct cifs_ntsd *pntsd = NULL;
2476 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2477 unsigned int xid;
2478 int rc;
2479 struct cifs_tcon *tcon;
2480 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2481 struct cifs_fid fid;
2482 struct cifs_open_parms oparms;
2483 __le16 *utf16_path;
2484
2485 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2486 if (IS_ERR(tlink))
2487 return ERR_CAST(tlink);
2488
2489 tcon = tlink_tcon(tlink);
2490 xid = get_xid();
2491
2492 if (backup_cred(cifs_sb))
709340a0 2493 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2f1afe25
SP		 2494 else
2495 oparms.create_options = 0;
2496
2497 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 2498 if (!utf16_path) {
2499 rc = -ENOMEM;
2500 free_xid(xid);
2501 return ERR_PTR(rc);
2502 }
2f1afe25
SP		 2503
2504 oparms.tcon = tcon;
2505 oparms.desired_access = READ_CONTROL;
2506 oparms.disposition = FILE_OPEN;
2507 oparms.fid = &fid;
2508 oparms.reconnect = false;
2509
9d874c36 2510 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2f1afe25
SP		 2511 kfree(utf16_path);
2512 if (!rc) {
2513 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2514 fid.volatile_fid, (void **)&pntsd, pacllen);
2515 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2516 }
2517
2518 cifs_put_tlink(tlink);
2519 free_xid(xid);
2520
2521 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2522 if (rc)
2523 return ERR_PTR(rc);
2524 return pntsd;
2525}
2526
366ed846
SP		 2527#ifdef CONFIG_CIFS_ACL
2528static int
2529set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2530 struct inode *inode, const char *path, int aclflag)
2531{
2532 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2533 unsigned int xid;
2534 int rc, access_flags = 0;
2535 struct cifs_tcon *tcon;
2536 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2537 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2538 struct cifs_fid fid;
2539 struct cifs_open_parms oparms;
2540 __le16 *utf16_path;
2541
2542 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2543 if (IS_ERR(tlink))
2544 return PTR_ERR(tlink);
2545
2546 tcon = tlink_tcon(tlink);
2547 xid = get_xid();
2548
2549 if (backup_cred(cifs_sb))
2550 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2551 else
2552 oparms.create_options = 0;
2553
2554 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2555 access_flags = WRITE_OWNER;
2556 else
2557 access_flags = WRITE_DAC;
2558
2559 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 2560 if (!utf16_path) {
2561 rc = -ENOMEM;
2562 free_xid(xid);
2563 return rc;
2564 }
366ed846
SP		 2565
2566 oparms.tcon = tcon;
2567 oparms.desired_access = access_flags;
2568 oparms.disposition = FILE_OPEN;
2569 oparms.path = path;
2570 oparms.fid = &fid;
2571 oparms.reconnect = false;
2572
9d874c36 2573 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
366ed846
SP		 2574 kfree(utf16_path);
2575 if (!rc) {
2576 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2577 fid.volatile_fid, pnntsd, acllen, aclflag);
2578 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2579 }
2580
2581 cifs_put_tlink(tlink);
2582 free_xid(xid);
2583 return rc;
2584}
2585#endif /* CIFS_ACL */
2586
2f1afe25
SP		 2587/* Retrieve an ACL from the server */
2588static struct cifs_ntsd *
2589get_smb2_acl(struct cifs_sb_info *cifs_sb,
2590 struct inode *inode, const char *path,
2591 u32 *pacllen)
2592{
2593 struct cifs_ntsd *pntsd = NULL;
2594 struct cifsFileInfo *open_file = NULL;
2595
2596 if (inode)
2597 open_file = find_readable_file(CIFS_I(inode), true);
2598 if (!open_file)
2599 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
2600
2601 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
2602 cifsFileInfo_put(open_file);
2603 return pntsd;
2604}
84908426 2605#endif
2f1afe25 2606
30175628
SF		 2607static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
2608 loff_t offset, loff_t len, bool keep_size)
2609{
72c419d9 2610 struct cifs_ses *ses = tcon->ses;
30175628
SF		 2611 struct inode *inode;
2612 struct cifsInodeInfo *cifsi;
2613 struct cifsFileInfo *cfile = file->private_data;
2614 struct file_zero_data_information fsctl_buf;
72c419d9
RS		 2615 struct smb_rqst rqst[2];
2616 int resp_buftype[2];
2617 struct kvec rsp_iov[2];
2618 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2619 struct kvec si_iov[1];
2620 unsigned int size[1];
2621 void *data[1];
30175628
SF		 2622 long rc;
2623 unsigned int xid;
72c419d9
RS		 2624 int num = 0, flags = 0;
2625 __le64 eof;
30175628
SF		 2626
2627 xid = get_xid();
2628
2b0143b5 2629 inode = d_inode(cfile->dentry);
30175628
SF		 2630 cifsi = CIFS_I(inode);
2631
779ede04
SF		 2632 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
2633 ses->Suid, offset, len);
2634
2635
30175628
SF		 2636 /* if file not oplocked can't be sure whether asking to extend size */
2637 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 2638 if (keep_size == false) {
2639 rc = -EOPNOTSUPP;
779ede04
SF		 2640 trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
2641 tcon->tid, ses->Suid, offset, len, rc);
cfe89091
SF		 2642 free_xid(xid);
2643 return rc;
2644 }
30175628 2645
2bb93d24 2646 /*
30175628
SF		 2647 * Must check if file sparse since fallocate -z (zero range) assumes
2648 * non-sparse allocation
2649 */
cfe89091
SF		 2650 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
2651 rc = -EOPNOTSUPP;
779ede04
SF		 2652 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
2653 ses->Suid, offset, len, rc);
cfe89091
SF		 2654 free_xid(xid);
2655 return rc;
2656 }
30175628 2657
30175628
SF		 2658 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2659
2660 fsctl_buf.FileOffset = cpu_to_le64(offset);
2661 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2662
72c419d9
RS		 2663 if (smb3_encryption_required(tcon))
2664 flags |= CIFS_TRANSFORM_REQ;
2665
2666 memset(rqst, 0, sizeof(rqst));
2667 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2668 memset(rsp_iov, 0, sizeof(rsp_iov));
2669
2670
2671 memset(&io_iov, 0, sizeof(io_iov));
2672 rqst[num].rq_iov = io_iov;
2673 rqst[num].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2674 rc = SMB2_ioctl_init(tcon, &rqst[num++], cfile->fid.persistent_fid,
2675 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2676 true /* is_fctl */, (char *)&fsctl_buf,
153322f7
SF		 2677 sizeof(struct file_zero_data_information),
2678 CIFSMaxBufSize);
72c419d9
RS		 2679 if (rc)
2680 goto zero_range_exit;
2681
2682 /*
2683 * do we also need to change the size of the file?
2684 */
2685 if (keep_size == false && i_size_read(inode) < offset + len) {
2686 smb2_set_next_command(tcon, &rqst[0]);
2687
2688 memset(&si_iov, 0, sizeof(si_iov));
2689 rqst[num].rq_iov = si_iov;
2690 rqst[num].rq_nvec = 1;
2691
2692 eof = cpu_to_le64(offset + len);
2693 size[0] = 8; /* sizeof __le64 */
2694 data[0] = &eof;
2695
2696 rc = SMB2_set_info_init(tcon, &rqst[num++],
2697 cfile->fid.persistent_fid,
2698 cfile->fid.persistent_fid,
2699 current->tgid,
2700 FILE_END_OF_FILE_INFORMATION,
2701 SMB2_O_INFO_FILE, 0, data, size);
2702 smb2_set_related(&rqst[1]);
2703 }
2704
2705 rc = compound_send_recv(xid, ses, flags, num, rqst,
2706 resp_buftype, rsp_iov);
2707
2708 zero_range_exit:
2709 SMB2_ioctl_free(&rqst[0]);
2710 SMB2_set_info_free(&rqst[1]);
2711 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2712 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
30175628 2713 free_xid(xid);
779ede04
SF		 2714 if (rc)
2715 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
2716 ses->Suid, offset, len, rc);
2717 else
2718 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
2719 ses->Suid, offset, len);
30175628
SF		 2720 return rc;
2721}
2722
31742c5a
SF		 2723static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2724 loff_t offset, loff_t len)
2725{
2726 struct inode *inode;
2727 struct cifsInodeInfo *cifsi;
2728 struct cifsFileInfo *cfile = file->private_data;
2729 struct file_zero_data_information fsctl_buf;
2730 long rc;
2731 unsigned int xid;
2732 __u8 set_sparse = 1;
2733
2734 xid = get_xid();
2735
2b0143b5 2736 inode = d_inode(cfile->dentry);
31742c5a
SF		 2737 cifsi = CIFS_I(inode);
2738
2739 /* Need to make file sparse, if not already, before freeing range. */
2740 /* Consider adding equivalent for compressed since it could also work */
cfe89091
SF		 2741 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2742 rc = -EOPNOTSUPP;
2743 free_xid(xid);
2744 return rc;
2745 }
31742c5a
SF		 2746
2747 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
2748
2749 fsctl_buf.FileOffset = cpu_to_le64(offset);
2750 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2751
2752 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2753 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 2754 true /* is_fctl */, (char *)&fsctl_buf,
153322f7
SF		 2755 sizeof(struct file_zero_data_information),
2756 CIFSMaxBufSize, NULL, NULL);
31742c5a
SF		 2757 free_xid(xid);
2758 return rc;
2759}
2760
9ccf3216
SF		 2761static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2762 loff_t off, loff_t len, bool keep_size)
2763{
2764 struct inode *inode;
2765 struct cifsInodeInfo *cifsi;
2766 struct cifsFileInfo *cfile = file->private_data;
2767 long rc = -EOPNOTSUPP;
2768 unsigned int xid;
f1699479 2769 __le64 eof;
9ccf3216
SF		 2770
2771 xid = get_xid();
2772
2b0143b5 2773 inode = d_inode(cfile->dentry);
9ccf3216
SF		 2774 cifsi = CIFS_I(inode);
2775
779ede04
SF		 2776 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
2777 tcon->ses->Suid, off, len);
9ccf3216
SF		 2778 /* if file not oplocked can't be sure whether asking to extend size */
2779 if (!CIFS_CACHE_READ(cifsi))
cfe89091 2780 if (keep_size == false) {
779ede04
SF		 2781 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
2782 tcon->tid, tcon->ses->Suid, off, len, rc);
cfe89091
SF		 2783 free_xid(xid);
2784 return rc;
2785 }
9ccf3216
SF		 2786
2787 /*
2788 * Files are non-sparse by default so falloc may be a no-op
2789 * Must check if file sparse. If not sparse, and not extending
2790 * then no need to do anything since file already allocated
2791 */
2792 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
2793 if (keep_size == true)
cfe89091 2794 rc = 0;
9ccf3216
SF		 2795 /* check if extending file */
2796 else if (i_size_read(inode) >= off + len)
2797 /* not extending file and already not sparse */
cfe89091 2798 rc = 0;
9ccf3216
SF		 2799 /* BB: in future add else clause to extend file */
2800 else
cfe89091 2801 rc = -EOPNOTSUPP;
779ede04
SF		 2802 if (rc)
2803 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
2804 tcon->tid, tcon->ses->Suid, off, len, rc);
2805 else
2806 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid,
2807 tcon->tid, tcon->ses->Suid, off, len);
cfe89091
SF		 2808 free_xid(xid);
2809 return rc;
9ccf3216
SF		 2810 }
2811
2812 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
2813 /*
2814 * Check if falloc starts within first few pages of file
2815 * and ends within a few pages of the end of file to
2816 * ensure that most of file is being forced to be
2817 * fallocated now. If so then setting whole file sparse
2818 * ie potentially making a few extra pages at the beginning
2819 * or end of the file non-sparse via set_sparse is harmless.
2820 */
cfe89091
SF		 2821 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
2822 rc = -EOPNOTSUPP;
779ede04
SF		 2823 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
2824 tcon->tid, tcon->ses->Suid, off, len, rc);
cfe89091
SF		 2825 free_xid(xid);
2826 return rc;
2827 }
9ccf3216 2828
f1699479
RS		 2829 smb2_set_sparse(xid, tcon, cfile, inode, false);
2830 rc = 0;
2831 } else {
2832 smb2_set_sparse(xid, tcon, cfile, inode, false);
2833 rc = 0;
2834 if (i_size_read(inode) < off + len) {
2835 eof = cpu_to_le64(off + len);
2836 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
2837 cfile->fid.volatile_fid, cfile->pid,
2838 &eof);
2839 }
9ccf3216 2840 }
9ccf3216 2841
779ede04
SF		 2842 if (rc)
2843 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
2844 tcon->ses->Suid, off, len, rc);
2845 else
2846 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
2847 tcon->ses->Suid, off, len);
9ccf3216
SF		 2848
2849 free_xid(xid);
2850 return rc;
2851}
2852
2853
31742c5a
SF		 2854static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
2855 loff_t off, loff_t len)
2856{
2857 /* KEEP_SIZE already checked for by do_fallocate */
2858 if (mode & FALLOC_FL_PUNCH_HOLE)
2859 return smb3_punch_hole(file, tcon, off, len);
30175628
SF		 2860 else if (mode & FALLOC_FL_ZERO_RANGE) {
2861 if (mode & FALLOC_FL_KEEP_SIZE)
2862 return smb3_zero_range(file, tcon, off, len, true);
2863 return smb3_zero_range(file, tcon, off, len, false);
9ccf3216
SF		 2864 } else if (mode == FALLOC_FL_KEEP_SIZE)
2865 return smb3_simple_falloc(file, tcon, off, len, true);
2866 else if (mode == 0)
2867 return smb3_simple_falloc(file, tcon, off, len, false);
31742c5a
SF		 2868
2869 return -EOPNOTSUPP;
2870}
2871
c11f1df5
SP		 2872static void
2873smb2_downgrade_oplock(struct TCP_Server_Info *server,
2874 struct cifsInodeInfo *cinode, bool set_level2)
2875{
2876 if (set_level2)
2877 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
2878 0, NULL);
2879 else
2880 server->ops->set_oplock_level(cinode, 0, 0, NULL);
2881}
2882
7b9b9edb
PS		 2883static void
2884smb21_downgrade_oplock(struct TCP_Server_Info *server,
2885 struct cifsInodeInfo *cinode, bool set_level2)
2886{
2887 server->ops->set_oplock_level(cinode,
2888 set_level2 ? SMB2_LEASE_READ_CACHING_HE :
2889 0, 0, NULL);
2890}
2891
53ef1016 2892static void
42873b0a
PS		 2893smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2894 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2895{
2896 oplock &= 0xFF;
2897 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2898 return;
2899 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
42873b0a 2900 cinode->oplock = CIFS_CACHE_RHW_FLG;
53ef1016
PS		 2901 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
2902 &cinode->vfs_inode);
2903 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
42873b0a 2904 cinode->oplock = CIFS_CACHE_RW_FLG;
53ef1016
PS		 2905 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
2906 &cinode->vfs_inode);
2907 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
2908 cinode->oplock = CIFS_CACHE_READ_FLG;
2909 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
2910 &cinode->vfs_inode);
2911 } else
2912 cinode->oplock = 0;
2913}
2914
2915static void
42873b0a
PS		 2916smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2917 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 2918{
2919 char message[5] = {0};
2920
2921 oplock &= 0xFF;
2922 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
2923 return;
2924
2925 cinode->oplock = 0;
2926 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
2927 cinode->oplock |= CIFS_CACHE_READ_FLG;
2928 strcat(message, "R");
2929 }
2930 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
2931 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
2932 strcat(message, "H");
2933 }
2934 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
2935 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
2936 strcat(message, "W");
2937 }
2938 if (!cinode->oplock)
2939 strcat(message, "None");
2940 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
2941 &cinode->vfs_inode);
2942}
2943
42873b0a
PS		 2944static void
2945smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
2946 unsigned int epoch, bool *purge_cache)
2947{
2948 unsigned int old_oplock = cinode->oplock;
2949
2950 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
2951
2952 if (purge_cache) {
2953 *purge_cache = false;
2954 if (old_oplock == CIFS_CACHE_READ_FLG) {
2955 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
2956 (epoch - cinode->epoch > 0))
2957 *purge_cache = true;
2958 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2959 (epoch - cinode->epoch > 1))
2960 *purge_cache = true;
2961 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2962 (epoch - cinode->epoch > 1))
2963 *purge_cache = true;
2964 else if (cinode->oplock == 0 &&
2965 (epoch - cinode->epoch > 0))
2966 *purge_cache = true;
2967 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
2968 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
2969 (epoch - cinode->epoch > 0))
2970 *purge_cache = true;
2971 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
2972 (epoch - cinode->epoch > 1))
2973 *purge_cache = true;
2974 }
2975 cinode->epoch = epoch;
2976 }
2977}
2978
53ef1016
PS		 2979static bool
2980smb2_is_read_op(__u32 oplock)
2981{
2982 return oplock == SMB2_OPLOCK_LEVEL_II;
2983}
2984
2985static bool
2986smb21_is_read_op(__u32 oplock)
2987{
2988 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
2989 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
2990}
2991
f047390a
PS		 2992static __le32
2993map_oplock_to_lease(u8 oplock)
2994{
2995 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
2996 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
2997 else if (oplock == SMB2_OPLOCK_LEVEL_II)
2998 return SMB2_LEASE_READ_CACHING;
2999 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3000 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3001 SMB2_LEASE_WRITE_CACHING;
3002 return 0;
3003}
3004
a41a28bd
PS		 3005static char *
3006smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3007{
3008 struct create_lease *buf;
3009
3010 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3011 if (!buf)
3012 return NULL;
3013
729c0c9d 3014 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a 3015 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
a41a28bd
PS		 3016
3017 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3018 (struct create_lease, lcontext));
3019 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3020 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3021 (struct create_lease, Name));
3022 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 3023 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
a41a28bd
PS		 3024 buf->Name[0] = 'R';
3025 buf->Name[1] = 'q';
3026 buf->Name[2] = 'L';
3027 buf->Name[3] = 's';
3028 return (char *)buf;
3029}
3030
f047390a
PS		 3031static char *
3032smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3033{
3034 struct create_lease_v2 *buf;
3035
3036 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3037 if (!buf)
3038 return NULL;
3039
729c0c9d 3040 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 3041 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3042
3043 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3044 (struct create_lease_v2, lcontext));
3045 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3046 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3047 (struct create_lease_v2, Name));
3048 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 3049 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
f047390a
PS		 3050 buf->Name[0] = 'R';
3051 buf->Name[1] = 'q';
3052 buf->Name[2] = 'L';
3053 buf->Name[3] = 's';
3054 return (char *)buf;
3055}
3056
b5c7cde3 3057static __u8
96164ab2 3058smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
b5c7cde3
PS		 3059{
3060 struct create_lease *lc = (struct create_lease *)buf;
3061
42873b0a 3062 *epoch = 0; /* not used */
b5c7cde3
PS		 3063 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3064 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3065 return le32_to_cpu(lc->lcontext.LeaseState);
3066}
3067
f047390a 3068static __u8
96164ab2 3069smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
f047390a
PS		 3070{
3071 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3072
42873b0a 3073 *epoch = le16_to_cpu(lc->lcontext.Epoch);
f047390a
PS		 3074 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3075 return SMB2_OPLOCK_LEVEL_NOCHANGE;
96164ab2 3076 if (lease_key)
729c0c9d 3077 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 3078 return le32_to_cpu(lc->lcontext.LeaseState);
3079}
3080
7f6c5008
PS		 3081static unsigned int
3082smb2_wp_retry_size(struct inode *inode)
3083{
3084 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3085 SMB2_MAX_BUFFER_SIZE);
3086}
3087
52755808
PS		 3088static bool
3089smb2_dir_needs_close(struct cifsFileInfo *cfile)
3090{
3091 return !cfile->invalidHandle;
3092}
3093
026e93dc 3094static void
977b6170
RS		 3095fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3096 struct smb_rqst *old_rq)
026e93dc
PS		 3097{
3098 struct smb2_sync_hdr *shdr =
c713c877 3099 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
026e93dc
PS		 3100
3101 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3102 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3103 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3104 tr_hdr->Flags = cpu_to_le16(0x01);
3105 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
3106 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
026e93dc
PS		 3107}
3108
262916bc
RS		 3109/* We can not use the normal sg_set_buf() as we will sometimes pass a
3110 * stack object as buf.
3111 */
3112static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3113 unsigned int buflen)
3114{
3115 sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
3116}
3117
b2c96de7
RS		 3118/* Assumes the first rqst has a transform header as the first iov.
3119 * I.e.
3120 * rqst[0].rq_iov[0] is transform header
3121 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3122 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
977b6170 3123 */
026e93dc 3124static struct scatterlist *
b2c96de7 3125init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
026e93dc 3126{
b2c96de7 3127 unsigned int sg_len;
026e93dc
PS		 3128 struct scatterlist *sg;
3129 unsigned int i;
3130 unsigned int j;
b2c96de7
RS		 3131 unsigned int idx = 0;
3132 int skip;
3133
3134 sg_len = 1;
3135 for (i = 0; i < num_rqst; i++)
3136 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
026e93dc
PS		 3137
3138 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3139 if (!sg)
3140 return NULL;
3141
3142 sg_init_table(sg, sg_len);
b2c96de7
RS		 3143 for (i = 0; i < num_rqst; i++) {
3144 for (j = 0; j < rqst[i].rq_nvec; j++) {
3145 /*
3146 * The first rqst has a transform header where the
3147 * first 20 bytes are not part of the encrypted blob
3148 */
3149 skip = (i == 0) && (j == 0) ? 20 : 0;
3150 smb2_sg_set_buf(&sg[idx++],
3151 rqst[i].rq_iov[j].iov_base + skip,
3152 rqst[i].rq_iov[j].iov_len - skip);
e77fe73c 3153 }
b2c96de7
RS		 3154
3155 for (j = 0; j < rqst[i].rq_npages; j++) {
3156 unsigned int len, offset;
d5f07fb3 3157
b2c96de7
RS		 3158 rqst_page_get_length(&rqst[i], j, &len, &offset);
3159 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3160 }
026e93dc 3161 }
b2c96de7 3162 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
026e93dc
PS		 3163 return sg;
3164}
3165
61cfac6f
PS		 3166static int
3167smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3168{
3169 struct cifs_ses *ses;
3170 u8 *ses_enc_key;
3171
3172 spin_lock(&cifs_tcp_ses_lock);
3173 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3174 if (ses->Suid != ses_id)
3175 continue;
3176 ses_enc_key = enc ? ses->smb3encryptionkey :
3177 ses->smb3decryptionkey;
3178 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3179 spin_unlock(&cifs_tcp_ses_lock);
3180 return 0;
3181 }
3182 spin_unlock(&cifs_tcp_ses_lock);
3183
3184 return 1;
3185}
026e93dc 3186/*
c713c877
RS		 3187 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3188 * iov[0] - transform header (associate data),
3189 * iov[1-N] - SMB2 header and pages - data to encrypt.
3190 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
026e93dc
PS		 3191 * untouched.
3192 */
3193static int
b2c96de7
RS		 3194crypt_message(struct TCP_Server_Info *server, int num_rqst,
3195 struct smb_rqst *rqst, int enc)
026e93dc
PS		 3196{
3197 struct smb2_transform_hdr *tr_hdr =
b2c96de7 3198 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
1fc6ad2f 3199 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
026e93dc
PS		 3200 int rc = 0;
3201 struct scatterlist *sg;
3202 u8 sign[SMB2_SIGNATURE_SIZE] = {};
61cfac6f 3203 u8 key[SMB3_SIGN_KEY_SIZE];
026e93dc
PS		 3204 struct aead_request *req;
3205 char *iv;
3206 unsigned int iv_len;
a5186b85 3207 DECLARE_CRYPTO_WAIT(wait);
026e93dc
PS		 3208 struct crypto_aead *tfm;
3209 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3210
61cfac6f
PS		 3211 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3212 if (rc) {
3213 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3214 enc ? "en" : "de");
026e93dc
PS		 3215 return 0;
3216 }
3217
3218 rc = smb3_crypto_aead_allocate(server);
3219 if (rc) {
3220 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3221 return rc;
3222 }
3223
3224 tfm = enc ? server->secmech.ccmaesencrypt :
3225 server->secmech.ccmaesdecrypt;
61cfac6f 3226 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
026e93dc
PS		 3227 if (rc) {
3228 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3229 return rc;
3230 }
3231
3232 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3233 if (rc) {
3234 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3235 return rc;
3236 }
3237
3238 req = aead_request_alloc(tfm, GFP_KERNEL);
3239 if (!req) {
3240 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
3241 return -ENOMEM;
3242 }
3243
3244 if (!enc) {
3245 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3246 crypt_len += SMB2_SIGNATURE_SIZE;
3247 }
3248
b2c96de7 3249 sg = init_sg(num_rqst, rqst, sign);
026e93dc 3250 if (!sg) {
517a6e43
CJ		 3251 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
3252 rc = -ENOMEM;
026e93dc
PS		 3253 goto free_req;
3254 }
3255
3256 iv_len = crypto_aead_ivsize(tfm);
3257 iv = kzalloc(iv_len, GFP_KERNEL);
3258 if (!iv) {
3259 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
517a6e43 3260 rc = -ENOMEM;
026e93dc
PS		 3261 goto free_sg;
3262 }
3263 iv[0] = 3;
3264 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
3265
3266 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3267 aead_request_set_ad(req, assoc_data_len);
3268
3269 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
a5186b85 3270 crypto_req_done, &wait);
026e93dc 3271
a5186b85
GBY		 3272 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3273 : crypto_aead_decrypt(req), &wait);
026e93dc
PS		 3274
3275 if (!rc && enc)
3276 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3277
3278 kfree(iv);
3279free_sg:
3280 kfree(sg);
3281free_req:
3282 kfree(req);
3283 return rc;
3284}
3285
b2c96de7
RS		 3286void
3287smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3288{
3289 int i, j;
3290
3291 for (i = 0; i < num_rqst; i++) {
3292 if (rqst[i].rq_pages) {
3293 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3294 put_page(rqst[i].rq_pages[j]);
3295 kfree(rqst[i].rq_pages);
3296 }
3297 }
3298}
3299
3300/*
3301 * This function will initialize new_rq and encrypt the content.
3302 * The first entry, new_rq[0], only contains a single iov which contains
3303 * a smb2_transform_hdr and is pre-allocated by the caller.
3304 * This function then populates new_rq[1+] with the content from olq_rq[0+].
3305 *
3306 * The end result is an array of smb_rqst structures where the first structure
3307 * only contains a single iov for the transform header which we then can pass
3308 * to crypt_message().
3309 *
3310 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
3311 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3312 */
026e93dc 3313static int
b2c96de7
RS		 3314smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3315 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
026e93dc 3316{
026e93dc 3317 struct page **pages;
b2c96de7
RS		 3318 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3319 unsigned int npages;
3320 unsigned int orig_len = 0;
3321 int i, j;
026e93dc
PS		 3322 int rc = -ENOMEM;
3323
b2c96de7
RS		 3324 for (i = 1; i < num_rqst; i++) {
3325 npages = old_rq[i - 1].rq_npages;
3326 pages = kmalloc_array(npages, sizeof(struct page *),
3327 GFP_KERNEL);
3328 if (!pages)
3329 goto err_free;
3330
3331 new_rq[i].rq_pages = pages;
3332 new_rq[i].rq_npages = npages;
3333 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3334 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3335 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3336 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3337 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3338
3339 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3340
3341 for (j = 0; j < npages; j++) {
3342 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3343 if (!pages[j])
3344 goto err_free;
3345 }
026e93dc 3346
b2c96de7
RS		 3347 /* copy pages form the old */
3348 for (j = 0; j < npages; j++) {
3349 char *dst, *src;
3350 unsigned int offset, len;
977b6170 3351
b2c96de7 3352 rqst_page_get_length(&new_rq[i], j, &len, &offset);
026e93dc 3353
b2c96de7
RS		 3354 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3355 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
026e93dc 3356
b2c96de7
RS		 3357 memcpy(dst, src, len);
3358 kunmap(new_rq[i].rq_pages[j]);
3359 kunmap(old_rq[i - 1].rq_pages[j]);
3360 }
3361 }
35e2cc1b 3362
b2c96de7 3363 /* fill the 1st iov with a transform header */
977b6170 3364 fill_transform_hdr(tr_hdr, orig_len, old_rq);
d5f07fb3 3365
b2c96de7 3366 rc = crypt_message(server, num_rqst, new_rq, 1);
026e93dc
PS		 3367 cifs_dbg(FYI, "encrypt message returned %d", rc);
3368 if (rc)
b2c96de7 3369 goto err_free;
026e93dc
PS		 3370
3371 return rc;
3372
b2c96de7
RS		 3373err_free:
3374 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
026e93dc
PS		 3375 return rc;
3376}
3377
4326ed2f
PS		 3378static int
3379smb3_is_transform_hdr(void *buf)
3380{
3381 struct smb2_transform_hdr *trhdr = buf;
3382
3383 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3384}
3385
3386static int
3387decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3388 unsigned int buf_data_size, struct page **pages,
3389 unsigned int npages, unsigned int page_data_size)
3390{
c713c877 3391 struct kvec iov[2];
4326ed2f 3392 struct smb_rqst rqst = {NULL};
4326ed2f
PS		 3393 int rc;
3394
c713c877
RS		 3395 iov[0].iov_base = buf;
3396 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3397 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3398 iov[1].iov_len = buf_data_size;
4326ed2f
PS		 3399
3400 rqst.rq_iov = iov;
c713c877 3401 rqst.rq_nvec = 2;
4326ed2f
PS		 3402 rqst.rq_pages = pages;
3403 rqst.rq_npages = npages;
3404 rqst.rq_pagesz = PAGE_SIZE;
3405 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3406
b2c96de7 3407 rc = crypt_message(server, 1, &rqst, 0);
4326ed2f
PS		 3408 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
3409
3410 if (rc)
3411 return rc;
3412
c713c877 3413 memmove(buf, iov[1].iov_base, buf_data_size);
977b6170
RS		 3414
3415 server->total_read = buf_data_size + page_data_size;
4326ed2f
PS		 3416
3417 return rc;
3418}
3419
c42a6abe
PS		 3420static int
3421read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
3422 unsigned int npages, unsigned int len)
3423{
3424 int i;
3425 int length;
3426
3427 for (i = 0; i < npages; i++) {
3428 struct page *page = pages[i];
3429 size_t n;
3430
3431 n = len;
3432 if (len >= PAGE_SIZE) {
3433 /* enough data to fill the page */
3434 n = PAGE_SIZE;
3435 len -= n;
3436 } else {
3437 zero_user(page, len, PAGE_SIZE - len);
3438 len = 0;
3439 }
1dbe3466 3440 length = cifs_read_page_from_socket(server, page, 0, n);
c42a6abe
PS		 3441 if (length < 0)
3442 return length;
3443 server->total_read += length;
3444 }
3445
3446 return 0;
3447}
3448
3449static int
3450init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
3451 unsigned int cur_off, struct bio_vec **page_vec)
3452{
3453 struct bio_vec *bvec;
3454 int i;
3455
3456 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
3457 if (!bvec)
3458 return -ENOMEM;
3459
3460 for (i = 0; i < npages; i++) {
3461 bvec[i].bv_page = pages[i];
3462 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
3463 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
3464 data_size -= bvec[i].bv_len;
3465 }
3466
3467 if (data_size != 0) {
3468 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
3469 kfree(bvec);
3470 return -EIO;
3471 }
3472
3473 *page_vec = bvec;
3474 return 0;
3475}
3476
4326ed2f
PS		 3477static int
3478handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
3479 char *buf, unsigned int buf_len, struct page **pages,
3480 unsigned int npages, unsigned int page_data_size)
3481{
3482 unsigned int data_offset;
3483 unsigned int data_len;
c42a6abe
PS		 3484 unsigned int cur_off;
3485 unsigned int cur_page_idx;
3486 unsigned int pad_len;
4326ed2f 3487 struct cifs_readdata *rdata = mid->callback_data;
49f466bd 3488 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4326ed2f
PS		 3489 struct bio_vec *bvec = NULL;
3490 struct iov_iter iter;
3491 struct kvec iov;
3492 int length;
74dcf418 3493 bool use_rdma_mr = false;
4326ed2f
PS		 3494
3495 if (shdr->Command != SMB2_READ) {
3496 cifs_dbg(VFS, "only big read responses are supported\n");
3497 return -ENOTSUPP;
3498 }
3499
511c54a2
PS		 3500 if (server->ops->is_session_expired &&
3501 server->ops->is_session_expired(buf)) {
3502 cifs_reconnect(server);
3503 wake_up(&server->response_q);
3504 return -1;
3505 }
3506
4326ed2f 3507 if (server->ops->is_status_pending &&
66265f13 3508 server->ops->is_status_pending(buf, server))
4326ed2f
PS		 3509 return -1;
3510
ec678eae
PS		 3511 /* set up first two iov to get credits */
3512 rdata->iov[0].iov_base = buf;
bb1bccb6
PS		 3513 rdata->iov[0].iov_len = 0;
3514 rdata->iov[1].iov_base = buf;
ec678eae 3515 rdata->iov[1].iov_len =
bb1bccb6 3516 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
ec678eae
PS		 3517 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
3518 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
3519 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
3520 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
3521
3522 rdata->result = server->ops->map_error(buf, true);
4326ed2f
PS		 3523 if (rdata->result != 0) {
3524 cifs_dbg(FYI, "%s: server returned error %d\n",
3525 __func__, rdata->result);
ec678eae
PS		 3526 /* normal error on read response */
3527 dequeue_mid(mid, false);
4326ed2f
PS		 3528 return 0;
3529 }
3530
1fc6ad2f 3531 data_offset = server->ops->read_data_offset(buf);
74dcf418
LL		 3532#ifdef CONFIG_CIFS_SMB_DIRECT
3533 use_rdma_mr = rdata->mr;
3534#endif
3535 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4326ed2f
PS		 3536
3537 if (data_offset < server->vals->read_rsp_size) {
3538 /*
3539 * win2k8 sometimes sends an offset of 0 when the read
3540 * is beyond the EOF. Treat it as if the data starts just after
3541 * the header.
3542 */
3543 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
3544 __func__, data_offset);
3545 data_offset = server->vals->read_rsp_size;
3546 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
3547 /* data_offset is beyond the end of smallbuf */
3548 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
3549 __func__, data_offset);
3550 rdata->result = -EIO;
3551 dequeue_mid(mid, rdata->result);
3552 return 0;
3553 }
3554
c42a6abe
PS		 3555 pad_len = data_offset - server->vals->read_rsp_size;
3556
4326ed2f
PS		 3557 if (buf_len <= data_offset) {
3558 /* read response payload is in pages */
c42a6abe
PS		 3559 cur_page_idx = pad_len / PAGE_SIZE;
3560 cur_off = pad_len % PAGE_SIZE;
3561
3562 if (cur_page_idx != 0) {
3563 /* data offset is beyond the 1st page of response */
3564 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
3565 __func__, data_offset);
3566 rdata->result = -EIO;
3567 dequeue_mid(mid, rdata->result);
3568 return 0;
3569 }
3570
3571 if (data_len > page_data_size - pad_len) {
3572 /* data_len is corrupt -- discard frame */
3573 rdata->result = -EIO;
3574 dequeue_mid(mid, rdata->result);
3575 return 0;
3576 }
3577
3578 rdata->result = init_read_bvec(pages, npages, page_data_size,
3579 cur_off, &bvec);
3580 if (rdata->result != 0) {
3581 dequeue_mid(mid, rdata->result);
3582 return 0;
3583 }
3584
aa563d7b 3585 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4326ed2f
PS		 3586 } else if (buf_len >= data_offset + data_len) {
3587 /* read response payload is in buf */
3588 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
3589 iov.iov_base = buf + data_offset;
3590 iov.iov_len = data_len;
aa563d7b 3591 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4326ed2f
PS		 3592 } else {
3593 /* read response payload cannot be in both buf and pages */
3594 WARN_ONCE(1, "buf can not contain only a part of read data");
3595 rdata->result = -EIO;
3596 dequeue_mid(mid, rdata->result);
3597 return 0;
3598 }
3599
4326ed2f
PS		 3600 length = rdata->copy_into_pages(server, rdata, &iter);
3601
3602 kfree(bvec);
3603
3604 if (length < 0)
3605 return length;
3606
3607 dequeue_mid(mid, false);
3608 return length;
3609}
3610
c42a6abe
PS		 3611static int
3612receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
3613{
3614 char *buf = server->smallbuf;
3615 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3616 unsigned int npages;
3617 struct page **pages;
3618 unsigned int len;
1fc6ad2f 3619 unsigned int buflen = server->pdu_size;
c42a6abe
PS		 3620 int rc;
3621 int i = 0;
3622
1fc6ad2f 3623 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
c42a6abe
PS		 3624 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
3625
3626 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
3627 if (rc < 0)
3628 return rc;
3629 server->total_read += rc;
3630
1fc6ad2f 3631 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
93012bf9 3632 server->vals->read_rsp_size;
c42a6abe
PS		 3633 npages = DIV_ROUND_UP(len, PAGE_SIZE);
3634
3635 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
3636 if (!pages) {
3637 rc = -ENOMEM;
3638 goto discard_data;
3639 }
3640
3641 for (; i < npages; i++) {
3642 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3643 if (!pages[i]) {
3644 rc = -ENOMEM;
3645 goto discard_data;
3646 }
3647 }
3648
3649 /* read read data into pages */
3650 rc = read_data_into_pages(server, pages, npages, len);
3651 if (rc)
3652 goto free_pages;
3653
350be257 3654 rc = cifs_discard_remaining_data(server);
c42a6abe
PS		 3655 if (rc)
3656 goto free_pages;
3657
1fc6ad2f 3658 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
c42a6abe
PS		 3659 pages, npages, len);
3660 if (rc)
3661 goto free_pages;
3662
3663 *mid = smb2_find_mid(server, buf);
3664 if (*mid == NULL)
3665 cifs_dbg(FYI, "mid not found\n");
3666 else {
3667 cifs_dbg(FYI, "mid found\n");
3668 (*mid)->decrypted = true;
3669 rc = handle_read_data(server, *mid, buf,
3670 server->vals->read_rsp_size,
3671 pages, npages, len);
3672 }
3673
3674free_pages:
3675 for (i = i - 1; i >= 0; i--)
3676 put_page(pages[i]);
3677 kfree(pages);
3678 return rc;
3679discard_data:
350be257 3680 cifs_discard_remaining_data(server);
c42a6abe
PS		 3681 goto free_pages;
3682}
3683
4326ed2f
PS		 3684static int
3685receive_encrypted_standard(struct TCP_Server_Info *server,
b24df3e3
RS		 3686 struct mid_q_entry **mids, char **bufs,
3687 int *num_mids)
4326ed2f 3688{
b24df3e3 3689 int ret, length;
4326ed2f 3690 char *buf = server->smallbuf;
b24df3e3
RS		 3691 char *tmpbuf;
3692 struct smb2_sync_hdr *shdr;
2e96467d 3693 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 3694 unsigned int buf_size;
3695 struct mid_q_entry *mid_entry;
b24df3e3
RS		 3696 int next_is_large;
3697 char *next_buffer = NULL;
3698
3699 *num_mids = 0;
4326ed2f
PS		 3700
3701 /* switch to large buffer if too big for a small one */
1fc6ad2f 3702 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4326ed2f
PS		 3703 server->large_buf = true;
3704 memcpy(server->bigbuf, buf, server->total_read);
3705 buf = server->bigbuf;
3706 }
3707
3708 /* now read the rest */
3709 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
1fc6ad2f 3710 pdu_length - HEADER_SIZE(server) + 1);
4326ed2f
PS		 3711 if (length < 0)
3712 return length;
3713 server->total_read += length;
3714
1fc6ad2f 3715 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4326ed2f
PS		 3716 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
3717 if (length)
3718 return length;
3719
b24df3e3
RS		 3720 next_is_large = server->large_buf;
3721 one_more:
3722 shdr = (struct smb2_sync_hdr *)buf;
3723 if (shdr->NextCommand) {
3724 if (next_is_large) {
3725 tmpbuf = server->bigbuf;
3726 next_buffer = (char *)cifs_buf_get();
3727 } else {
3728 tmpbuf = server->smallbuf;
3729 next_buffer = (char *)cifs_small_buf_get();
3730 }
3731 memcpy(next_buffer,
3732 tmpbuf + le32_to_cpu(shdr->NextCommand),
3733 pdu_length - le32_to_cpu(shdr->NextCommand));
3734 }
3735
4326ed2f
PS		 3736 mid_entry = smb2_find_mid(server, buf);
3737 if (mid_entry == NULL)
3738 cifs_dbg(FYI, "mid not found\n");
3739 else {
3740 cifs_dbg(FYI, "mid found\n");
3741 mid_entry->decrypted = true;
b24df3e3 3742 mid_entry->resp_buf_size = server->pdu_size;
4326ed2f
PS		 3743 }
3744
b24df3e3
RS		 3745 if (*num_mids >= MAX_COMPOUND) {
3746 cifs_dbg(VFS, "too many PDUs in compound\n");
3747 return -1;
3748 }
3749 bufs[*num_mids] = buf;
3750 mids[(*num_mids)++] = mid_entry;
4326ed2f
PS		 3751
3752 if (mid_entry && mid_entry->handle)
b24df3e3
RS		 3753 ret = mid_entry->handle(server, mid_entry);
3754 else
3755 ret = cifs_handle_standard(server, mid_entry);
3756
3757 if (ret == 0 && shdr->NextCommand) {
3758 pdu_length -= le32_to_cpu(shdr->NextCommand);
3759 server->large_buf = next_is_large;
3760 if (next_is_large)
3761 server->bigbuf = next_buffer;
3762 else
3763 server->smallbuf = next_buffer;
3764
3765 buf += le32_to_cpu(shdr->NextCommand);
3766 goto one_more;
3767 }
4326ed2f 3768
b24df3e3 3769 return ret;
4326ed2f
PS		 3770}
3771
3772static int
b24df3e3
RS		 3773smb3_receive_transform(struct TCP_Server_Info *server,
3774 struct mid_q_entry **mids, char **bufs, int *num_mids)
4326ed2f
PS		 3775{
3776 char *buf = server->smallbuf;
2e96467d 3777 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 3778 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3779 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3780
1fc6ad2f 3781 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4326ed2f
PS		 3782 sizeof(struct smb2_sync_hdr)) {
3783 cifs_dbg(VFS, "Transform message is too small (%u)\n",
3784 pdu_length);
3785 cifs_reconnect(server);
3786 wake_up(&server->response_q);
3787 return -ECONNABORTED;
3788 }
3789
1fc6ad2f 3790 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4326ed2f
PS		 3791 cifs_dbg(VFS, "Transform message is broken\n");
3792 cifs_reconnect(server);
3793 wake_up(&server->response_q);
3794 return -ECONNABORTED;
3795 }
3796
b24df3e3 3797 /* TODO: add support for compounds containing READ. */
6d2f84ee
PA		 3798 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
3799 *num_mids = 1;
b24df3e3 3800 return receive_encrypted_read(server, &mids[0]);
6d2f84ee 3801 }
4326ed2f 3802
b24df3e3 3803 return receive_encrypted_standard(server, mids, bufs, num_mids);
4326ed2f
PS		 3804}
3805
3806int
3807smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
3808{
3809 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
3810
1fc6ad2f 3811 return handle_read_data(server, mid, buf, server->pdu_size,
4326ed2f
PS		 3812 NULL, 0, 0);
3813}
3814
8ce79ec3
RS		 3815static int
3816smb2_next_header(char *buf)
3817{
3818 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
3819 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
3820
3821 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
3822 return sizeof(struct smb2_transform_hdr) +
3823 le32_to_cpu(t_hdr->OriginalMessageSize);
3824
3825 return le32_to_cpu(hdr->NextCommand);
3826}
3827
c847dccf
AA		 3828static int
3829smb2_make_node(unsigned int xid, struct inode *inode,
3830 struct dentry *dentry, struct cifs_tcon *tcon,
3831 char *full_path, umode_t mode, dev_t dev)
3832{
3833 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3834 int rc = -EPERM;
3835 int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
3836 FILE_ALL_INFO *buf = NULL;
3837 struct cifs_io_parms io_parms;
3838 __u32 oplock = 0;
3839 struct cifs_fid fid;
3840 struct cifs_open_parms oparms;
3841 unsigned int bytes_written;
3842 struct win_dev *pdev;
3843 struct kvec iov[2];
3844
3845 /*
3846 * Check if mounted with mount parm 'sfu' mount parm.
3847 * SFU emulation should work with all servers, but only
3848 * supports block and char device (no socket & fifo),
3849 * and was used by default in earlier versions of Windows
3850 */
3851 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
3852 goto out;
3853
3854 /*
3855 * TODO: Add ability to create instead via reparse point. Windows (e.g.
3856 * their current NFS server) uses this approach to expose special files
3857 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
3858 */
3859
3860 if (!S_ISCHR(mode) && !S_ISBLK(mode))
3861 goto out;
3862
3863 cifs_dbg(FYI, "sfu compat create special file\n");
3864
3865 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
3866 if (buf == NULL) {
3867 rc = -ENOMEM;
3868 goto out;
3869 }
3870
3871 if (backup_cred(cifs_sb))
3872 create_options |= CREATE_OPEN_BACKUP_INTENT;
3873
3874 oparms.tcon = tcon;
3875 oparms.cifs_sb = cifs_sb;
3876 oparms.desired_access = GENERIC_WRITE;
3877 oparms.create_options = create_options;
3878 oparms.disposition = FILE_CREATE;
3879 oparms.path = full_path;
3880 oparms.fid = &fid;
3881 oparms.reconnect = false;
3882
3883 if (tcon->ses->server->oplocks)
3884 oplock = REQ_OPLOCK;
3885 else
3886 oplock = 0;
3887 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
3888 if (rc)
3889 goto out;
3890
3891 /*
3892 * BB Do not bother to decode buf since no local inode yet to put
3893 * timestamps in, but we can reuse it safely.
3894 */
3895
3896 pdev = (struct win_dev *)buf;
3897 io_parms.pid = current->tgid;
3898 io_parms.tcon = tcon;
3899 io_parms.offset = 0;
3900 io_parms.length = sizeof(struct win_dev);
3901 iov[1].iov_base = buf;
3902 iov[1].iov_len = sizeof(struct win_dev);
3903 if (S_ISCHR(mode)) {
3904 memcpy(pdev->type, "IntxCHR", 8);
3905 pdev->major = cpu_to_le64(MAJOR(dev));
3906 pdev->minor = cpu_to_le64(MINOR(dev));
3907 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
3908 &bytes_written, iov, 1);
3909 } else if (S_ISBLK(mode)) {
3910 memcpy(pdev->type, "IntxBLK", 8);
3911 pdev->major = cpu_to_le64(MAJOR(dev));
3912 pdev->minor = cpu_to_le64(MINOR(dev));
3913 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
3914 &bytes_written, iov, 1);
3915 }
3916 tcon->ses->server->ops->close(xid, tcon, &fid);
3917 d_drop(dentry);
3918
3919 /* FIXME: add code here to set EAs */
3920out:
3921 kfree(buf);
3922 return rc;
3923}
3924
3925
53ef1016 3926struct smb_version_operations smb20_operations = {
027e8eec 3927 .compare_fids = smb2_compare_fids,
2dc7e1c0 3928 .setup_request = smb2_setup_request,
c95b8eed 3929 .setup_async_request = smb2_setup_async_request,
2dc7e1c0 3930 .check_receive = smb2_check_receive,
28ea5290
PS		 3931 .add_credits = smb2_add_credits,
3932 .set_credits = smb2_set_credits,
3933 .get_credits_field = smb2_get_credits_field,
3934 .get_credits = smb2_get_credits,
cb7e9eab 3935 .wait_mtu_credits = cifs_wait_mtu_credits,
2dc7e1c0 3936 .get_next_mid = smb2_get_next_mid,
c781af7e 3937 .revert_current_mid = smb2_revert_current_mid,
09a4707e
PS		 3938 .read_data_offset = smb2_read_data_offset,
3939 .read_data_length = smb2_read_data_length,
3940 .map_error = map_smb2_to_linux_error,
093b2bda
PS		 3941 .find_mid = smb2_find_mid,
3942 .check_message = smb2_check_message,
3943 .dump_detail = smb2_dump_detail,
d60622eb
PS		 3944 .clear_stats = smb2_clear_stats,
3945 .print_stats = smb2_print_stats,
983c88a4 3946 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 3947 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 3948 .downgrade_oplock = smb2_downgrade_oplock,
ec2e4523
PS		 3949 .need_neg = smb2_need_neg,
3950 .negotiate = smb2_negotiate,
3a3bab50
PS		 3951 .negotiate_wsize = smb2_negotiate_wsize,
3952 .negotiate_rsize = smb2_negotiate_rsize,
5478f9ba
PS		 3953 .sess_setup = SMB2_sess_setup,
3954 .logoff = SMB2_logoff,
faaf946a
PS		 3955 .tree_connect = SMB2_tcon,
3956 .tree_disconnect = SMB2_tdis,
34f62640 3957 .qfs_tcon = smb2_qfs_tcon,
2503a0db 3958 .is_path_accessible = smb2_is_path_accessible,
9094fad1
PS		 3959 .can_echo = smb2_can_echo,
3960 .echo = SMB2_echo,
be4cb9e3
PS		 3961 .query_path_info = smb2_query_path_info,
3962 .get_srv_inum = smb2_get_srv_inum,
b7546bc5 3963 .query_file_info = smb2_query_file_info,
c839ff24
PS		 3964 .set_path_size = smb2_set_path_size,
3965 .set_file_size = smb2_set_file_size,
1feeaac7 3966 .set_file_info = smb2_set_file_info,
64a5cfa6 3967 .set_compression = smb2_set_compression,
a0e73183
PS		 3968 .mkdir = smb2_mkdir,
3969 .mkdir_setinfo = smb2_mkdir_setinfo,
1a500f01 3970 .rmdir = smb2_rmdir,
cbe6f439 3971 .unlink = smb2_unlink,
35143eb5 3972 .rename = smb2_rename_path,
568798cc 3973 .create_hardlink = smb2_create_hardlink,
b42bf888 3974 .query_symlink = smb2_query_symlink,
5b23c97d
SP		 3975 .query_mf_symlink = smb3_query_mf_symlink,
3976 .create_mf_symlink = smb3_create_mf_symlink,
f0df737e
PS		 3977 .open = smb2_open_file,
3978 .set_fid = smb2_set_fid,
3979 .close = smb2_close_file,
7a5cfb19 3980 .flush = smb2_flush_file,
09a4707e 3981 .async_readv = smb2_async_readv,
33319141 3982 .async_writev = smb2_async_writev,
d8e05039 3983 .sync_read = smb2_sync_read,
009d3443 3984 .sync_write = smb2_sync_write,
d324f08d
PS		 3985 .query_dir_first = smb2_query_dir_first,
3986 .query_dir_next = smb2_query_dir_next,
3987 .close_dir = smb2_close_dir,
3988 .calc_smb_size = smb2_calc_size,
2e44b288 3989 .is_status_pending = smb2_is_status_pending,
511c54a2 3990 .is_session_expired = smb2_is_session_expired,
983c88a4 3991 .oplock_response = smb2_oplock_response,
6fc05c25 3992 .queryfs = smb2_queryfs,
f7ba7fe6
PS		 3993 .mand_lock = smb2_mand_lock,
3994 .mand_unlock_range = smb2_unlock_range,
b140799a 3995 .push_mand_locks = smb2_push_mandatory_locks,
b8c32dbb
PS		 3996 .get_lease_key = smb2_get_lease_key,
3997 .set_lease_key = smb2_set_lease_key,
3998 .new_lease_key = smb2_new_lease_key,
38107d45 3999 .calc_signature = smb2_calc_signature,
53ef1016
PS		 4000 .is_read_op = smb2_is_read_op,
4001 .set_oplock_level = smb2_set_oplock_level,
a41a28bd 4002 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 4003 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 4004 .copychunk_range = smb2_copychunk_range,
7f6c5008 4005 .wp_retry_size = smb2_wp_retry_size,
52755808 4006 .dir_needs_close = smb2_dir_needs_close,
9d49640a 4007 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 4008 .select_sectype = smb2_select_sectype,
95907fea
RS		 4009#ifdef CONFIG_CIFS_XATTR
4010 .query_all_EAs = smb2_query_eas,
5517554e 4011 .set_EA = smb2_set_ea,
95907fea 4012#endif /* CIFS_XATTR */
2f1afe25
SP		 4013#ifdef CONFIG_CIFS_ACL
4014 .get_acl = get_smb2_acl,
4015 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 4016 .set_acl = set_smb2_acl,
2f1afe25 4017#endif /* CIFS_ACL */
8ce79ec3 4018 .next_header = smb2_next_header,
f5b05d62 4019 .ioctl_query_info = smb2_ioctl_query_info,
c847dccf 4020 .make_node = smb2_make_node,
38107d45
SF		 4021};
4022
53ef1016
PS		 4023struct smb_version_operations smb21_operations = {
4024 .compare_fids = smb2_compare_fids,
4025 .setup_request = smb2_setup_request,
4026 .setup_async_request = smb2_setup_async_request,
4027 .check_receive = smb2_check_receive,
4028 .add_credits = smb2_add_credits,
4029 .set_credits = smb2_set_credits,
4030 .get_credits_field = smb2_get_credits_field,
4031 .get_credits = smb2_get_credits,
cb7e9eab 4032 .wait_mtu_credits = smb2_wait_mtu_credits,
9a1c67e8 4033 .adjust_credits = smb2_adjust_credits,
53ef1016 4034 .get_next_mid = smb2_get_next_mid,
c781af7e 4035 .revert_current_mid = smb2_revert_current_mid,
53ef1016
PS		 4036 .read_data_offset = smb2_read_data_offset,
4037 .read_data_length = smb2_read_data_length,
4038 .map_error = map_smb2_to_linux_error,
4039 .find_mid = smb2_find_mid,
4040 .check_message = smb2_check_message,
4041 .dump_detail = smb2_dump_detail,
4042 .clear_stats = smb2_clear_stats,
4043 .print_stats = smb2_print_stats,
4044 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 4045 .handle_cancelled_mid = smb2_handle_cancelled_mid,
7b9b9edb 4046 .downgrade_oplock = smb21_downgrade_oplock,
53ef1016
PS		 4047 .need_neg = smb2_need_neg,
4048 .negotiate = smb2_negotiate,
4049 .negotiate_wsize = smb2_negotiate_wsize,
4050 .negotiate_rsize = smb2_negotiate_rsize,
4051 .sess_setup = SMB2_sess_setup,
4052 .logoff = SMB2_logoff,
4053 .tree_connect = SMB2_tcon,
4054 .tree_disconnect = SMB2_tdis,
34f62640 4055 .qfs_tcon = smb2_qfs_tcon,
53ef1016
PS		 4056 .is_path_accessible = smb2_is_path_accessible,
4057 .can_echo = smb2_can_echo,
4058 .echo = SMB2_echo,
4059 .query_path_info = smb2_query_path_info,
4060 .get_srv_inum = smb2_get_srv_inum,
4061 .query_file_info = smb2_query_file_info,
4062 .set_path_size = smb2_set_path_size,
4063 .set_file_size = smb2_set_file_size,
4064 .set_file_info = smb2_set_file_info,
64a5cfa6 4065 .set_compression = smb2_set_compression,
53ef1016
PS		 4066 .mkdir = smb2_mkdir,
4067 .mkdir_setinfo = smb2_mkdir_setinfo,
4068 .rmdir = smb2_rmdir,
4069 .unlink = smb2_unlink,
4070 .rename = smb2_rename_path,
4071 .create_hardlink = smb2_create_hardlink,
4072 .query_symlink = smb2_query_symlink,
c22870ea 4073 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 4074 .create_mf_symlink = smb3_create_mf_symlink,
53ef1016
PS		 4075 .open = smb2_open_file,
4076 .set_fid = smb2_set_fid,
4077 .close = smb2_close_file,
4078 .flush = smb2_flush_file,
4079 .async_readv = smb2_async_readv,
4080 .async_writev = smb2_async_writev,
4081 .sync_read = smb2_sync_read,
4082 .sync_write = smb2_sync_write,
4083 .query_dir_first = smb2_query_dir_first,
4084 .query_dir_next = smb2_query_dir_next,
4085 .close_dir = smb2_close_dir,
4086 .calc_smb_size = smb2_calc_size,
4087 .is_status_pending = smb2_is_status_pending,
511c54a2 4088 .is_session_expired = smb2_is_session_expired,
53ef1016
PS		 4089 .oplock_response = smb2_oplock_response,
4090 .queryfs = smb2_queryfs,
4091 .mand_lock = smb2_mand_lock,
4092 .mand_unlock_range = smb2_unlock_range,
4093 .push_mand_locks = smb2_push_mandatory_locks,
4094 .get_lease_key = smb2_get_lease_key,
4095 .set_lease_key = smb2_set_lease_key,
4096 .new_lease_key = smb2_new_lease_key,
4097 .calc_signature = smb2_calc_signature,
4098 .is_read_op = smb21_is_read_op,
4099 .set_oplock_level = smb21_set_oplock_level,
a41a28bd 4100 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 4101 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 4102 .copychunk_range = smb2_copychunk_range,
7f6c5008 4103 .wp_retry_size = smb2_wp_retry_size,
52755808 4104 .dir_needs_close = smb2_dir_needs_close,
834170c8 4105 .enum_snapshots = smb3_enum_snapshots,
9d49640a 4106 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 4107 .select_sectype = smb2_select_sectype,
95907fea
RS		 4108#ifdef CONFIG_CIFS_XATTR
4109 .query_all_EAs = smb2_query_eas,
5517554e 4110 .set_EA = smb2_set_ea,
95907fea 4111#endif /* CIFS_XATTR */
2f1afe25
SP		 4112#ifdef CONFIG_CIFS_ACL
4113 .get_acl = get_smb2_acl,
4114 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 4115 .set_acl = set_smb2_acl,
2f1afe25 4116#endif /* CIFS_ACL */
8ce79ec3 4117 .next_header = smb2_next_header,
f5b05d62 4118 .ioctl_query_info = smb2_ioctl_query_info,
c847dccf 4119 .make_node = smb2_make_node,
53ef1016 4120};
38107d45
SF		 4121
4122struct smb_version_operations smb30_operations = {
4123 .compare_fids = smb2_compare_fids,
4124 .setup_request = smb2_setup_request,
4125 .setup_async_request = smb2_setup_async_request,
4126 .check_receive = smb2_check_receive,
4127 .add_credits = smb2_add_credits,
4128 .set_credits = smb2_set_credits,
4129 .get_credits_field = smb2_get_credits_field,
4130 .get_credits = smb2_get_credits,
cb7e9eab 4131 .wait_mtu_credits = smb2_wait_mtu_credits,
9a1c67e8 4132 .adjust_credits = smb2_adjust_credits,
38107d45 4133 .get_next_mid = smb2_get_next_mid,
c781af7e 4134 .revert_current_mid = smb2_revert_current_mid,
38107d45
SF		 4135 .read_data_offset = smb2_read_data_offset,
4136 .read_data_length = smb2_read_data_length,
4137 .map_error = map_smb2_to_linux_error,
4138 .find_mid = smb2_find_mid,
4139 .check_message = smb2_check_message,
4140 .dump_detail = smb2_dump_detail,
4141 .clear_stats = smb2_clear_stats,
4142 .print_stats = smb2_print_stats,
769ee6a4 4143 .dump_share_caps = smb2_dump_share_caps,
38107d45 4144 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 4145 .handle_cancelled_mid = smb2_handle_cancelled_mid,
7b9b9edb 4146 .downgrade_oplock = smb21_downgrade_oplock,
38107d45
SF		 4147 .need_neg = smb2_need_neg,
4148 .negotiate = smb2_negotiate,
3d621230
SF		 4149 .negotiate_wsize = smb3_negotiate_wsize,
4150 .negotiate_rsize = smb3_negotiate_rsize,
38107d45
SF		 4151 .sess_setup = SMB2_sess_setup,
4152 .logoff = SMB2_logoff,
4153 .tree_connect = SMB2_tcon,
4154 .tree_disconnect = SMB2_tdis,
af6a12ea 4155 .qfs_tcon = smb3_qfs_tcon,
38107d45
SF		 4156 .is_path_accessible = smb2_is_path_accessible,
4157 .can_echo = smb2_can_echo,
4158 .echo = SMB2_echo,
4159 .query_path_info = smb2_query_path_info,
4160 .get_srv_inum = smb2_get_srv_inum,
4161 .query_file_info = smb2_query_file_info,
4162 .set_path_size = smb2_set_path_size,
4163 .set_file_size = smb2_set_file_size,
4164 .set_file_info = smb2_set_file_info,
64a5cfa6 4165 .set_compression = smb2_set_compression,
38107d45
SF		 4166 .mkdir = smb2_mkdir,
4167 .mkdir_setinfo = smb2_mkdir_setinfo,
4168 .rmdir = smb2_rmdir,
4169 .unlink = smb2_unlink,
4170 .rename = smb2_rename_path,
4171 .create_hardlink = smb2_create_hardlink,
b42bf888 4172 .query_symlink = smb2_query_symlink,
c22870ea 4173 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 4174 .create_mf_symlink = smb3_create_mf_symlink,
38107d45
SF		 4175 .open = smb2_open_file,
4176 .set_fid = smb2_set_fid,
4177 .close = smb2_close_file,
4178 .flush = smb2_flush_file,
4179 .async_readv = smb2_async_readv,
4180 .async_writev = smb2_async_writev,
4181 .sync_read = smb2_sync_read,
4182 .sync_write = smb2_sync_write,
4183 .query_dir_first = smb2_query_dir_first,
4184 .query_dir_next = smb2_query_dir_next,
4185 .close_dir = smb2_close_dir,
4186 .calc_smb_size = smb2_calc_size,
4187 .is_status_pending = smb2_is_status_pending,
511c54a2 4188 .is_session_expired = smb2_is_session_expired,
38107d45
SF		 4189 .oplock_response = smb2_oplock_response,
4190 .queryfs = smb2_queryfs,
4191 .mand_lock = smb2_mand_lock,
4192 .mand_unlock_range = smb2_unlock_range,
4193 .push_mand_locks = smb2_push_mandatory_locks,
4194 .get_lease_key = smb2_get_lease_key,
4195 .set_lease_key = smb2_set_lease_key,
4196 .new_lease_key = smb2_new_lease_key,
373512ec 4197 .generate_signingkey = generate_smb30signingkey,
38107d45 4198 .calc_signature = smb3_calc_signature,
b3152e2c 4199 .set_integrity = smb3_set_integrity,
53ef1016 4200 .is_read_op = smb21_is_read_op,
42873b0a 4201 .set_oplock_level = smb3_set_oplock_level,
f047390a
PS		 4202 .create_lease_buf = smb3_create_lease_buf,
4203 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 4204 .copychunk_range = smb2_copychunk_range,
ca9e7a1c 4205 .duplicate_extents = smb2_duplicate_extents,
ff1c038a 4206 .validate_negotiate = smb3_validate_negotiate,
7f6c5008 4207 .wp_retry_size = smb2_wp_retry_size,
52755808 4208 .dir_needs_close = smb2_dir_needs_close,
31742c5a 4209 .fallocate = smb3_fallocate,
834170c8 4210 .enum_snapshots = smb3_enum_snapshots,
026e93dc 4211 .init_transform_rq = smb3_init_transform_rq,
4326ed2f
PS		 4212 .is_transform_hdr = smb3_is_transform_hdr,
4213 .receive_transform = smb3_receive_transform,
9d49640a 4214 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 4215 .select_sectype = smb2_select_sectype,
95907fea
RS		 4216#ifdef CONFIG_CIFS_XATTR
4217 .query_all_EAs = smb2_query_eas,
5517554e 4218 .set_EA = smb2_set_ea,
95907fea 4219#endif /* CIFS_XATTR */
2f1afe25
SP		 4220#ifdef CONFIG_CIFS_ACL
4221 .get_acl = get_smb2_acl,
4222 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 4223 .set_acl = set_smb2_acl,
2f1afe25 4224#endif /* CIFS_ACL */
8ce79ec3 4225 .next_header = smb2_next_header,
f5b05d62 4226 .ioctl_query_info = smb2_ioctl_query_info,
c847dccf 4227 .make_node = smb2_make_node,
1080ef75
SF		 4228};
4229
aab1893d
SF		 4230struct smb_version_operations smb311_operations = {
4231 .compare_fids = smb2_compare_fids,
4232 .setup_request = smb2_setup_request,
4233 .setup_async_request = smb2_setup_async_request,
4234 .check_receive = smb2_check_receive,
4235 .add_credits = smb2_add_credits,
4236 .set_credits = smb2_set_credits,
4237 .get_credits_field = smb2_get_credits_field,
4238 .get_credits = smb2_get_credits,
4239 .wait_mtu_credits = smb2_wait_mtu_credits,
9a1c67e8 4240 .adjust_credits = smb2_adjust_credits,
aab1893d 4241 .get_next_mid = smb2_get_next_mid,
c781af7e 4242 .revert_current_mid = smb2_revert_current_mid,
aab1893d
SF		 4243 .read_data_offset = smb2_read_data_offset,
4244 .read_data_length = smb2_read_data_length,
4245 .map_error = map_smb2_to_linux_error,
4246 .find_mid = smb2_find_mid,
4247 .check_message = smb2_check_message,
4248 .dump_detail = smb2_dump_detail,
4249 .clear_stats = smb2_clear_stats,
4250 .print_stats = smb2_print_stats,
4251 .dump_share_caps = smb2_dump_share_caps,
4252 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 4253 .handle_cancelled_mid = smb2_handle_cancelled_mid,
7b9b9edb 4254 .downgrade_oplock = smb21_downgrade_oplock,
aab1893d
SF		 4255 .need_neg = smb2_need_neg,
4256 .negotiate = smb2_negotiate,
3d621230
SF		 4257 .negotiate_wsize = smb3_negotiate_wsize,
4258 .negotiate_rsize = smb3_negotiate_rsize,
aab1893d
SF		 4259 .sess_setup = SMB2_sess_setup,
4260 .logoff = SMB2_logoff,
4261 .tree_connect = SMB2_tcon,
4262 .tree_disconnect = SMB2_tdis,
4263 .qfs_tcon = smb3_qfs_tcon,
4264 .is_path_accessible = smb2_is_path_accessible,
4265 .can_echo = smb2_can_echo,
4266 .echo = SMB2_echo,
4267 .query_path_info = smb2_query_path_info,
4268 .get_srv_inum = smb2_get_srv_inum,
4269 .query_file_info = smb2_query_file_info,
4270 .set_path_size = smb2_set_path_size,
4271 .set_file_size = smb2_set_file_size,
4272 .set_file_info = smb2_set_file_info,
4273 .set_compression = smb2_set_compression,
4274 .mkdir = smb2_mkdir,
4275 .mkdir_setinfo = smb2_mkdir_setinfo,
bea851b8 4276 .posix_mkdir = smb311_posix_mkdir,
aab1893d
SF		 4277 .rmdir = smb2_rmdir,
4278 .unlink = smb2_unlink,
4279 .rename = smb2_rename_path,
4280 .create_hardlink = smb2_create_hardlink,
4281 .query_symlink = smb2_query_symlink,
4282 .query_mf_symlink = smb3_query_mf_symlink,
4283 .create_mf_symlink = smb3_create_mf_symlink,
4284 .open = smb2_open_file,
4285 .set_fid = smb2_set_fid,
4286 .close = smb2_close_file,
4287 .flush = smb2_flush_file,
4288 .async_readv = smb2_async_readv,
4289 .async_writev = smb2_async_writev,
4290 .sync_read = smb2_sync_read,
4291 .sync_write = smb2_sync_write,
4292 .query_dir_first = smb2_query_dir_first,
4293 .query_dir_next = smb2_query_dir_next,
4294 .close_dir = smb2_close_dir,
4295 .calc_smb_size = smb2_calc_size,
4296 .is_status_pending = smb2_is_status_pending,
511c54a2 4297 .is_session_expired = smb2_is_session_expired,
aab1893d 4298 .oplock_response = smb2_oplock_response,
2d304217 4299 .queryfs = smb311_queryfs,
aab1893d
SF		 4300 .mand_lock = smb2_mand_lock,
4301 .mand_unlock_range = smb2_unlock_range,
4302 .push_mand_locks = smb2_push_mandatory_locks,
4303 .get_lease_key = smb2_get_lease_key,
4304 .set_lease_key = smb2_set_lease_key,
4305 .new_lease_key = smb2_new_lease_key,
373512ec 4306 .generate_signingkey = generate_smb311signingkey,
aab1893d 4307 .calc_signature = smb3_calc_signature,
b3152e2c 4308 .set_integrity = smb3_set_integrity,
aab1893d
SF		 4309 .is_read_op = smb21_is_read_op,
4310 .set_oplock_level = smb3_set_oplock_level,
4311 .create_lease_buf = smb3_create_lease_buf,
4312 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 4313 .copychunk_range = smb2_copychunk_range,
02b16665 4314 .duplicate_extents = smb2_duplicate_extents,
aab1893d
SF		 4315/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
4316 .wp_retry_size = smb2_wp_retry_size,
4317 .dir_needs_close = smb2_dir_needs_close,
4318 .fallocate = smb3_fallocate,
834170c8 4319 .enum_snapshots = smb3_enum_snapshots,
026e93dc 4320 .init_transform_rq = smb3_init_transform_rq,
4326ed2f
PS		 4321 .is_transform_hdr = smb3_is_transform_hdr,
4322 .receive_transform = smb3_receive_transform,
9d49640a 4323 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 4324 .select_sectype = smb2_select_sectype,
95907fea
RS		 4325#ifdef CONFIG_CIFS_XATTR
4326 .query_all_EAs = smb2_query_eas,
5517554e 4327 .set_EA = smb2_set_ea,
95907fea 4328#endif /* CIFS_XATTR */
c1777df1
RS		 4329#ifdef CONFIG_CIFS_ACL
4330 .get_acl = get_smb2_acl,
4331 .get_acl_by_fid = get_smb2_acl_by_fid,
4332 .set_acl = set_smb2_acl,
4333#endif /* CIFS_ACL */
8ce79ec3 4334 .next_header = smb2_next_header,
f5b05d62 4335 .ioctl_query_info = smb2_ioctl_query_info,
c847dccf 4336 .make_node = smb2_make_node,
aab1893d 4337};
aab1893d 4338
dd446b16
SF		 4339struct smb_version_values smb20_values = {
4340 .version_string = SMB20_VERSION_STRING,
4341 .protocol_id = SMB20_PROT_ID,
4342 .req_capabilities = 0, /* MBZ */
4343 .large_lock_type = 0,
4344 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4345 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4346 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4347 .header_size = sizeof(struct smb2_sync_hdr),
4348 .header_preamble_size = 0,
dd446b16
SF		 4349 .max_header_size = MAX_SMB2_HDR_SIZE,
4350 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4351 .lock_cmd = SMB2_LOCK,
4352 .cap_unix = 0,
4353 .cap_nt_find = SMB2_NT_FIND,
4354 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 4355 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4356 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 4357 .create_lease_size = sizeof(struct create_lease),
dd446b16
SF		 4358};
4359
1080ef75
SF		 4360struct smb_version_values smb21_values = {
4361 .version_string = SMB21_VERSION_STRING,
e4aa25e7
SF		 4362 .protocol_id = SMB21_PROT_ID,
4363 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
4364 .large_lock_type = 0,
4365 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4366 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4367 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4368 .header_size = sizeof(struct smb2_sync_hdr),
4369 .header_preamble_size = 0,
e4aa25e7
SF		 4370 .max_header_size = MAX_SMB2_HDR_SIZE,
4371 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4372 .lock_cmd = SMB2_LOCK,
4373 .cap_unix = 0,
4374 .cap_nt_find = SMB2_NT_FIND,
4375 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 4376 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4377 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 4378 .create_lease_size = sizeof(struct create_lease),
e4aa25e7
SF		 4379};
4380
9764c02f
SF		 4381struct smb_version_values smb3any_values = {
4382 .version_string = SMB3ANY_VERSION_STRING,
4383 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
f8015683 4384 .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		 4385 .large_lock_type = 0,
4386 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4387 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4388 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4389 .header_size = sizeof(struct smb2_sync_hdr),
4390 .header_preamble_size = 0,
9764c02f
SF		 4391 .max_header_size = MAX_SMB2_HDR_SIZE,
4392 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4393 .lock_cmd = SMB2_LOCK,
4394 .cap_unix = 0,
4395 .cap_nt_find = SMB2_NT_FIND,
4396 .cap_large_files = SMB2_LARGE_FILES,
4397 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4398 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4399 .create_lease_size = sizeof(struct create_lease_v2),
4400};
4401
4402struct smb_version_values smbdefault_values = {
4403 .version_string = SMBDEFAULT_VERSION_STRING,
4404 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
f8015683 4405 .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		 4406 .large_lock_type = 0,
4407 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4408 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4409 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4410 .header_size = sizeof(struct smb2_sync_hdr),
4411 .header_preamble_size = 0,
9764c02f
SF		 4412 .max_header_size = MAX_SMB2_HDR_SIZE,
4413 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4414 .lock_cmd = SMB2_LOCK,
4415 .cap_unix = 0,
4416 .cap_nt_find = SMB2_NT_FIND,
4417 .cap_large_files = SMB2_LARGE_FILES,
4418 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4419 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4420 .create_lease_size = sizeof(struct create_lease_v2),
4421};
4422
e4aa25e7
SF		 4423struct smb_version_values smb30_values = {
4424 .version_string = SMB30_VERSION_STRING,
4425 .protocol_id = SMB30_PROT_ID,
f8015683 4426 .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		 4427 .large_lock_type = 0,
4428 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4429 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4430 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4431 .header_size = sizeof(struct smb2_sync_hdr),
4432 .header_preamble_size = 0,
093b2bda 4433 .max_header_size = MAX_SMB2_HDR_SIZE,
09a4707e 4434 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2dc7e1c0 4435 .lock_cmd = SMB2_LOCK,
29e20f9c
PS		 4436 .cap_unix = 0,
4437 .cap_nt_find = SMB2_NT_FIND,
4438 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 4439 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4440 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 4441 .create_lease_size = sizeof(struct create_lease_v2),
1080ef75 4442};
20b6d8b4
SF		 4443
4444struct smb_version_values smb302_values = {
4445 .version_string = SMB302_VERSION_STRING,
4446 .protocol_id = SMB302_PROT_ID,
f8015683 4447 .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		 4448 .large_lock_type = 0,
4449 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4450 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4451 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4452 .header_size = sizeof(struct smb2_sync_hdr),
4453 .header_preamble_size = 0,
20b6d8b4
SF		 4454 .max_header_size = MAX_SMB2_HDR_SIZE,
4455 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4456 .lock_cmd = SMB2_LOCK,
4457 .cap_unix = 0,
4458 .cap_nt_find = SMB2_NT_FIND,
4459 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 4460 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4461 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 4462 .create_lease_size = sizeof(struct create_lease_v2),
20b6d8b4 4463};
5f7fbf73 4464
5f7fbf73
SF		 4465struct smb_version_values smb311_values = {
4466 .version_string = SMB311_VERSION_STRING,
4467 .protocol_id = SMB311_PROT_ID,
f8015683 4468 .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		 4469 .large_lock_type = 0,
4470 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4471 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4472 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 4473 .header_size = sizeof(struct smb2_sync_hdr),
4474 .header_preamble_size = 0,
5f7fbf73
SF		 4475 .max_header_size = MAX_SMB2_HDR_SIZE,
4476 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4477 .lock_cmd = SMB2_LOCK,
4478 .cap_unix = 0,
4479 .cap_nt_find = SMB2_NT_FIND,
4480 .cap_large_files = SMB2_LARGE_FILES,
4481 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4482 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4483 .create_lease_size = sizeof(struct create_lease_v2),
4484};
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