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cifs: use compounding for open and first query-dir for readdir()
[mirror_ubuntu-hirsute-kernel.git] / fs / cifs / smb2ops.c
CommitLineData
a205d500 1// SPDX-License-Identifier: GPL-2.0
1080ef75
SF		 2/*
3 * SMB2 version specific operations
4 *
5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
1080ef75
SF		 6 */
7
3a3bab50 8#include <linux/pagemap.h>
6fc05c25 9#include <linux/vfs.h>
f29ebb47 10#include <linux/falloc.h>
026e93dc 11#include <linux/scatterlist.h>
4fa8e504 12#include <linux/uuid.h>
35adffed 13#include <linux/sort.h>
026e93dc 14#include <crypto/aead.h>
1080ef75 15#include "cifsglob.h"
2dc7e1c0
PS		 16#include "smb2pdu.h"
17#include "smb2proto.h"
28ea5290
PS		 18#include "cifsproto.h"
19#include "cifs_debug.h"
b42bf888 20#include "cifs_unicode.h"
2e44b288 21#include "smb2status.h"
6fc05c25 22#include "smb2glob.h"
834170c8 23#include "cifs_ioctl.h"
09902f8d 24#include "smbdirect.h"
28ea5290 25
ef68e831 26/* Change credits for different ops and return the total number of credits */
28ea5290
PS		 27static int
28change_conf(struct TCP_Server_Info *server)
29{
30 server->credits += server->echo_credits + server->oplock_credits;
31 server->oplock_credits = server->echo_credits = 0;
32 switch (server->credits) {
33 case 0:
ef68e831 34 return 0;
28ea5290
PS		 35 case 1:
36 server->echoes = false;
37 server->oplocks = false;
28ea5290
PS		 38 break;
39 case 2:
40 server->echoes = true;
41 server->oplocks = false;
42 server->echo_credits = 1;
28ea5290
PS		 43 break;
44 default:
45 server->echoes = true;
e0ddde9d
SF		 46 if (enable_oplocks) {
47 server->oplocks = true;
48 server->oplock_credits = 1;
49 } else
50 server->oplocks = false;
51
28ea5290 52 server->echo_credits = 1;
28ea5290
PS		 53 }
54 server->credits -= server->echo_credits + server->oplock_credits;
ef68e831 55 return server->credits + server->echo_credits + server->oplock_credits;
28ea5290
PS		 56}
57
58static void
335b7b62
PS		 59smb2_add_credits(struct TCP_Server_Info *server,
60 const struct cifs_credits *credits, const int optype)
28ea5290 61{
ef68e831 62 int *val, rc = -1;
335b7b62
PS		 63 unsigned int add = credits->value;
64 unsigned int instance = credits->instance;
65 bool reconnect_detected = false;
ef68e831 66
28ea5290
PS		 67 spin_lock(&server->req_lock);
68 val = server->ops->get_credits_field(server, optype);
b340a4d4
SF		 69
70 /* eg found case where write overlapping reconnect messed up credits */
71 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
72 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
73 server->hostname, *val);
335b7b62
PS		 74 if ((instance == 0) || (instance == server->reconnect_instance))
75 *val += add;
76 else
77 reconnect_detected = true;
b340a4d4 78
141891f4
SF		 79 if (*val > 65000) {
80 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
81 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
82 }
28ea5290 83 server->in_flight--;
ec2e4523 84 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
28ea5290 85 rc = change_conf(server);
983c88a4
PS		 86 /*
87 * Sometimes server returns 0 credits on oplock break ack - we need to
88 * rebalance credits in this case.
89 */
90 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
91 server->oplocks) {
92 if (server->credits > 1) {
93 server->credits--;
94 server->oplock_credits++;
95 }
96 }
28ea5290
PS		 97 spin_unlock(&server->req_lock);
98 wake_up(&server->request_q);
ef68e831 99
335b7b62
PS		 100 if (reconnect_detected)
101 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
102 add, instance);
103
82e0457a
PS		 104 if (server->tcpStatus == CifsNeedReconnect
105 || server->tcpStatus == CifsExiting)
ef68e831
PS		 106 return;
107
108 switch (rc) {
109 case -1:
110 /* change_conf hasn't been executed */
111 break;
112 case 0:
3175eb9b 113 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
ef68e831
PS		 114 break;
115 case 1:
3175eb9b 116 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
ef68e831
PS		 117 break;
118 case 2:
119 cifs_dbg(FYI, "disabling oplocks\n");
120 break;
121 default:
122 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
123 }
28ea5290
PS		 124}
125
126static void
127smb2_set_credits(struct TCP_Server_Info *server, const int val)
128{
129 spin_lock(&server->req_lock);
130 server->credits = val;
9e1a37da
SF		 131 if (val == 1)
132 server->reconnect_instance++;
28ea5290 133 spin_unlock(&server->req_lock);
6e4d3bbe
SF		 134 /* don't log while holding the lock */
135 if (val == 1)
136 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
28ea5290
PS		 137}
138
139static int *
140smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
141{
142 switch (optype) {
143 case CIFS_ECHO_OP:
144 return &server->echo_credits;
145 case CIFS_OBREAK_OP:
146 return &server->oplock_credits;
147 default:
148 return &server->credits;
149 }
150}
151
152static unsigned int
153smb2_get_credits(struct mid_q_entry *mid)
154{
86a7964b 155 return mid->credits_received;
28ea5290 156}
2dc7e1c0 157
cb7e9eab
PS		 158static int
159smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
335b7b62 160 unsigned int *num, struct cifs_credits *credits)
cb7e9eab
PS		 161{
162 int rc = 0;
163 unsigned int scredits;
164
165 spin_lock(&server->req_lock);
166 while (1) {
167 if (server->credits <= 0) {
168 spin_unlock(&server->req_lock);
169 cifs_num_waiters_inc(server);
170 rc = wait_event_killable(server->request_q,
b227d215 171 has_credits(server, &server->credits, 1));
cb7e9eab
PS		 172 cifs_num_waiters_dec(server);
173 if (rc)
174 return rc;
175 spin_lock(&server->req_lock);
176 } else {
177 if (server->tcpStatus == CifsExiting) {
178 spin_unlock(&server->req_lock);
179 return -ENOENT;
180 }
181
182 scredits = server->credits;
183 /* can deadlock with reopen */
acc58d0b 184 if (scredits <= 8) {
cb7e9eab 185 *num = SMB2_MAX_BUFFER_SIZE;
335b7b62
PS		 186 credits->value = 0;
187 credits->instance = 0;
cb7e9eab
PS		 188 break;
189 }
190
acc58d0b
PS		 191 /* leave some credits for reopen and other ops */
192 scredits -= 8;
cb7e9eab
PS		 193 *num = min_t(unsigned int, size,
194 scredits * SMB2_MAX_BUFFER_SIZE);
195
335b7b62
PS		 196 credits->value =
197 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
198 credits->instance = server->reconnect_instance;
199 server->credits -= credits->value;
cb7e9eab 200 server->in_flight++;
1b63f184
SF		 201 if (server->in_flight > server->max_in_flight)
202 server->max_in_flight = server->in_flight;
cb7e9eab
PS		 203 break;
204 }
205 }
206 spin_unlock(&server->req_lock);
207 return rc;
208}
209
9a1c67e8
PS		 210static int
211smb2_adjust_credits(struct TCP_Server_Info *server,
212 struct cifs_credits *credits,
213 const unsigned int payload_size)
214{
215 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
216
217 if (!credits->value || credits->value == new_val)
218 return 0;
219
220 if (credits->value < new_val) {
221 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
222 credits->value, new_val);
223 return -ENOTSUPP;
224 }
225
226 spin_lock(&server->req_lock);
227
228 if (server->reconnect_instance != credits->instance) {
229 spin_unlock(&server->req_lock);
3175eb9b 230 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
9a1c67e8
PS		 231 credits->value - new_val);
232 return -EAGAIN;
233 }
234
235 server->credits += credits->value - new_val;
236 spin_unlock(&server->req_lock);
237 wake_up(&server->request_q);
238 credits->value = new_val;
239 return 0;
240}
241
2dc7e1c0
PS		 242static __u64
243smb2_get_next_mid(struct TCP_Server_Info *server)
244{
245 __u64 mid;
246 /* for SMB2 we need the current value */
247 spin_lock(&GlobalMid_Lock);
248 mid = server->CurrentMid++;
249 spin_unlock(&GlobalMid_Lock);
250 return mid;
251}
1080ef75 252
c781af7e
PS		 253static void
254smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
255{
256 spin_lock(&GlobalMid_Lock);
257 if (server->CurrentMid >= val)
258 server->CurrentMid -= val;
259 spin_unlock(&GlobalMid_Lock);
260}
261
093b2bda
PS		 262static struct mid_q_entry *
263smb2_find_mid(struct TCP_Server_Info *server, char *buf)
264{
265 struct mid_q_entry *mid;
49f466bd 266 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
31473fc4 267 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
093b2bda 268
31473fc4 269 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
3175eb9b 270 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
373512ec
SF		 271 return NULL;
272 }
273
093b2bda
PS		 274 spin_lock(&GlobalMid_Lock);
275 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
9235d098 276 if ((mid->mid == wire_mid) &&
093b2bda 277 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
31473fc4 278 (mid->command == shdr->Command)) {
696e420b 279 kref_get(&mid->refcount);
093b2bda
PS		 280 spin_unlock(&GlobalMid_Lock);
281 return mid;
282 }
283 }
284 spin_unlock(&GlobalMid_Lock);
285 return NULL;
286}
287
288static void
14547f7d 289smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
093b2bda
PS		 290{
291#ifdef CONFIG_CIFS_DEBUG2
49f466bd 292 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
093b2bda 293
3175eb9b 294 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
31473fc4
PS		 295 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
296 shdr->ProcessId);
3175eb9b 297 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
71992e62 298 server->ops->calc_smb_size(buf, server));
093b2bda
PS		 299#endif
300}
301
ec2e4523
PS		 302static bool
303smb2_need_neg(struct TCP_Server_Info *server)
304{
305 return server->max_read == 0;
306}
307
308static int
309smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
310{
311 int rc;
a205d500 312
f6a6bf7c 313 cifs_ses_server(ses)->CurrentMid = 0;
ec2e4523
PS		 314 rc = SMB2_negotiate(xid, ses);
315 /* BB we probably don't need to retry with modern servers */
316 if (rc == -EAGAIN)
317 rc = -EHOSTDOWN;
318 return rc;
319}
320
3a3bab50
PS		 321static unsigned int
322smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
323{
324 struct TCP_Server_Info *server = tcon->ses->server;
325 unsigned int wsize;
326
327 /* start with specified wsize, or default */
328 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
329 wsize = min_t(unsigned int, wsize, server->max_write);
09902f8d 330#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 331 if (server->rdma) {
332 if (server->sign)
333 wsize = min_t(unsigned int,
334 wsize, server->smbd_conn->max_fragmented_send_size);
335 else
336 wsize = min_t(unsigned int,
09902f8d 337 wsize, server->smbd_conn->max_readwrite_size);
bb4c0419 338 }
09902f8d 339#endif
cb7e9eab
PS		 340 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
341 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 342
3a3bab50
PS		 343 return wsize;
344}
345
3d621230
SF		 346static unsigned int
347smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
348{
349 struct TCP_Server_Info *server = tcon->ses->server;
350 unsigned int wsize;
351
352 /* start with specified wsize, or default */
353 wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
354 wsize = min_t(unsigned int, wsize, server->max_write);
355#ifdef CONFIG_CIFS_SMB_DIRECT
356 if (server->rdma) {
357 if (server->sign)
358 wsize = min_t(unsigned int,
359 wsize, server->smbd_conn->max_fragmented_send_size);
360 else
361 wsize = min_t(unsigned int,
362 wsize, server->smbd_conn->max_readwrite_size);
363 }
364#endif
365 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
366 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
367
368 return wsize;
369}
370
3a3bab50
PS		 371static unsigned int
372smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
373{
374 struct TCP_Server_Info *server = tcon->ses->server;
375 unsigned int rsize;
376
377 /* start with specified rsize, or default */
378 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
379 rsize = min_t(unsigned int, rsize, server->max_read);
09902f8d 380#ifdef CONFIG_CIFS_SMB_DIRECT
bb4c0419
LL		 381 if (server->rdma) {
382 if (server->sign)
383 rsize = min_t(unsigned int,
384 rsize, server->smbd_conn->max_fragmented_recv_size);
385 else
386 rsize = min_t(unsigned int,
09902f8d 387 rsize, server->smbd_conn->max_readwrite_size);
bb4c0419 388 }
09902f8d 389#endif
bed9da02
PS		 390
391 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
392 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
3a3bab50 393
3a3bab50
PS		 394 return rsize;
395}
396
3d621230
SF		 397static unsigned int
398smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
399{
400 struct TCP_Server_Info *server = tcon->ses->server;
401 unsigned int rsize;
402
403 /* start with specified rsize, or default */
404 rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
405 rsize = min_t(unsigned int, rsize, server->max_read);
406#ifdef CONFIG_CIFS_SMB_DIRECT
407 if (server->rdma) {
408 if (server->sign)
409 rsize = min_t(unsigned int,
410 rsize, server->smbd_conn->max_fragmented_recv_size);
411 else
412 rsize = min_t(unsigned int,
413 rsize, server->smbd_conn->max_readwrite_size);
414 }
415#endif
416
417 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
418 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
419
420 return rsize;
421}
fe856be4
AA		 422
423static int
424parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
425 size_t buf_len,
426 struct cifs_server_iface **iface_list,
427 size_t *iface_count)
428{
429 struct network_interface_info_ioctl_rsp *p;
430 struct sockaddr_in *addr4;
431 struct sockaddr_in6 *addr6;
432 struct iface_info_ipv4 *p4;
433 struct iface_info_ipv6 *p6;
434 struct cifs_server_iface *info;
435 ssize_t bytes_left;
436 size_t next = 0;
437 int nb_iface = 0;
438 int rc = 0;
439
440 *iface_list = NULL;
441 *iface_count = 0;
442
443 /*
444 * Fist pass: count and sanity check
445 */
446
447 bytes_left = buf_len;
448 p = buf;
449 while (bytes_left >= sizeof(*p)) {
450 nb_iface++;
451 next = le32_to_cpu(p->Next);
452 if (!next) {
453 bytes_left -= sizeof(*p);
454 break;
455 }
456 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
457 bytes_left -= next;
458 }
459
460 if (!nb_iface) {
461 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
462 rc = -EINVAL;
463 goto out;
464 }
465
466 if (bytes_left || p->Next)
467 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
468
469
470 /*
471 * Second pass: extract info to internal structure
472 */
473
474 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
475 if (!*iface_list) {
476 rc = -ENOMEM;
477 goto out;
478 }
479
480 info = *iface_list;
481 bytes_left = buf_len;
482 p = buf;
483 while (bytes_left >= sizeof(*p)) {
484 info->speed = le64_to_cpu(p->LinkSpeed);
485 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
486 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
487
488 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
489 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
490 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
491 le32_to_cpu(p->Capability));
492
493 switch (p->Family) {
494 /*
495 * The kernel and wire socket structures have the same
496 * layout and use network byte order but make the
497 * conversion explicit in case either one changes.
498 */
499 case INTERNETWORK:
500 addr4 = (struct sockaddr_in *)&info->sockaddr;
501 p4 = (struct iface_info_ipv4 *)p->Buffer;
502 addr4->sin_family = AF_INET;
503 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
504
505 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
506 addr4->sin_port = cpu_to_be16(CIFS_PORT);
507
508 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
509 &addr4->sin_addr);
510 break;
511 case INTERNETWORKV6:
512 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
513 p6 = (struct iface_info_ipv6 *)p->Buffer;
514 addr6->sin6_family = AF_INET6;
515 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
516
517 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
518 addr6->sin6_flowinfo = 0;
519 addr6->sin6_scope_id = 0;
520 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
521
522 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
523 &addr6->sin6_addr);
524 break;
525 default:
526 cifs_dbg(VFS,
527 "%s: skipping unsupported socket family\n",
528 __func__);
529 goto next_iface;
530 }
531
532 (*iface_count)++;
533 info++;
534next_iface:
535 next = le32_to_cpu(p->Next);
536 if (!next)
537 break;
538 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
539 bytes_left -= next;
540 }
541
542 if (!*iface_count) {
543 rc = -EINVAL;
544 goto out;
545 }
546
547out:
548 if (rc) {
549 kfree(*iface_list);
550 *iface_count = 0;
551 *iface_list = NULL;
552 }
553 return rc;
554}
555
35adffed
AA		 556static int compare_iface(const void *ia, const void *ib)
557{
558 const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
559 const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
560
561 return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
562}
fe856be4 563
c481e9fe
SF		 564static int
565SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
566{
567 int rc;
568 unsigned int ret_data_len = 0;
fe856be4
AA		 569 struct network_interface_info_ioctl_rsp *out_buf = NULL;
570 struct cifs_server_iface *iface_list;
571 size_t iface_count;
572 struct cifs_ses *ses = tcon->ses;
c481e9fe
SF		 573
574 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
575 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
576 NULL /* no data input */, 0 /* no data input */,
153322f7 577 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
c3ed4402
SF		 578 if (rc == -EOPNOTSUPP) {
579 cifs_dbg(FYI,
580 "server does not support query network interfaces\n");
581 goto out;
582 } else if (rc != 0) {
3175eb9b 583 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
fe856be4 584 goto out;
9ffc5412 585 }
fe856be4
AA		 586
587 rc = parse_server_interfaces(out_buf, ret_data_len,
588 &iface_list, &iface_count);
589 if (rc)
590 goto out;
591
35adffed
AA		 592 /* sort interfaces from fastest to slowest */
593 sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
594
fe856be4
AA		 595 spin_lock(&ses->iface_lock);
596 kfree(ses->iface_list);
597 ses->iface_list = iface_list;
598 ses->iface_count = iface_count;
599 ses->iface_last_update = jiffies;
600 spin_unlock(&ses->iface_lock);
601
602out:
24df1483 603 kfree(out_buf);
c481e9fe
SF		 604 return rc;
605}
c481e9fe 606
9da6ec77
RS		 607static void
608smb2_close_cached_fid(struct kref *ref)
a93864d9 609{
9da6ec77
RS		 610 struct cached_fid *cfid = container_of(ref, struct cached_fid,
611 refcount);
612
a93864d9
RS		 613 if (cfid->is_valid) {
614 cifs_dbg(FYI, "clear cached root file handle\n");
615 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
616 cfid->fid->volatile_fid);
617 cfid->is_valid = false;
b0f6df73 618 cfid->file_all_info_is_valid = false;
d9191319 619 cfid->has_lease = false;
a93864d9 620 }
9da6ec77
RS		 621}
622
623void close_shroot(struct cached_fid *cfid)
624{
625 mutex_lock(&cfid->fid_mutex);
626 kref_put(&cfid->refcount, smb2_close_cached_fid);
a93864d9
RS		 627 mutex_unlock(&cfid->fid_mutex);
628}
629
d9191319
PS		 630void close_shroot_lease_locked(struct cached_fid *cfid)
631{
632 if (cfid->has_lease) {
633 cfid->has_lease = false;
634 kref_put(&cfid->refcount, smb2_close_cached_fid);
635 }
636}
637
638void close_shroot_lease(struct cached_fid *cfid)
639{
640 mutex_lock(&cfid->fid_mutex);
641 close_shroot_lease_locked(cfid);
642 mutex_unlock(&cfid->fid_mutex);
643}
644
9da6ec77
RS		 645void
646smb2_cached_lease_break(struct work_struct *work)
647{
648 struct cached_fid *cfid = container_of(work,
649 struct cached_fid, lease_break);
650
d9191319 651 close_shroot_lease(cfid);
9da6ec77
RS		 652}
653
3d4ef9a1
SF		 654/*
655 * Open the directory at the root of a share
656 */
657int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
658{
b0f6df73
RS		 659 struct cifs_ses *ses = tcon->ses;
660 struct TCP_Server_Info *server = ses->server;
661 struct cifs_open_parms oparms;
662 struct smb2_create_rsp *o_rsp = NULL;
663 struct smb2_query_info_rsp *qi_rsp = NULL;
664 int resp_buftype[2];
665 struct smb_rqst rqst[2];
666 struct kvec rsp_iov[2];
667 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
668 struct kvec qi_iov[1];
669 int rc, flags = 0;
670 __le16 utf16_path = 0; /* Null - since an open of top of share */
a93864d9 671 u8 oplock = SMB2_OPLOCK_LEVEL_II;
3d4ef9a1 672
a93864d9
RS		 673 mutex_lock(&tcon->crfid.fid_mutex);
674 if (tcon->crfid.is_valid) {
3d4ef9a1 675 cifs_dbg(FYI, "found a cached root file handle\n");
a93864d9 676 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
9da6ec77 677 kref_get(&tcon->crfid.refcount);
a93864d9 678 mutex_unlock(&tcon->crfid.fid_mutex);
3d4ef9a1
SF		 679 return 0;
680 }
681
96d9f7ed
SF		 682 /*
683 * We do not hold the lock for the open because in case
684 * SMB2_open needs to reconnect, it will end up calling
685 * cifs_mark_open_files_invalid() which takes the lock again
686 * thus causing a deadlock
687 */
688
689 mutex_unlock(&tcon->crfid.fid_mutex);
690
b0f6df73
RS		 691 if (smb3_encryption_required(tcon))
692 flags |= CIFS_TRANSFORM_REQ;
693
694 memset(rqst, 0, sizeof(rqst));
695 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
696 memset(rsp_iov, 0, sizeof(rsp_iov));
697
698 /* Open */
699 memset(&open_iov, 0, sizeof(open_iov));
700 rqst[0].rq_iov = open_iov;
701 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
702
703 oparms.tcon = tcon;
704 oparms.create_options = 0;
705 oparms.desired_access = FILE_READ_ATTRIBUTES;
706 oparms.disposition = FILE_OPEN;
707 oparms.fid = pfid;
708 oparms.reconnect = false;
709
710 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
711 if (rc)
96d9f7ed 712 goto oshr_free;
b0f6df73
RS		 713 smb2_set_next_command(tcon, &rqst[0]);
714
715 memset(&qi_iov, 0, sizeof(qi_iov));
716 rqst[1].rq_iov = qi_iov;
717 rqst[1].rq_nvec = 1;
718
719 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
720 COMPOUND_FID, FILE_ALL_INFORMATION,
721 SMB2_O_INFO_FILE, 0,
722 sizeof(struct smb2_file_all_info) +
723 PATH_MAX * 2, 0, NULL);
724 if (rc)
96d9f7ed 725 goto oshr_free;
b0f6df73
RS		 726
727 smb2_set_related(&rqst[1]);
728
729 rc = compound_send_recv(xid, ses, flags, 2, rqst,
730 resp_buftype, rsp_iov);
7e5a70ad
AA		 731 mutex_lock(&tcon->crfid.fid_mutex);
732
733 /*
734 * Now we need to check again as the cached root might have
735 * been successfully re-opened from a concurrent process
736 */
737
738 if (tcon->crfid.is_valid) {
739 /* work was already done */
740
741 /* stash fids for close() later */
742 struct cifs_fid fid = {
743 .persistent_fid = pfid->persistent_fid,
744 .volatile_fid = pfid->volatile_fid,
745 };
746
747 /*
748 * caller expects this func to set pfid to a valid
749 * cached root, so we copy the existing one and get a
750 * reference.
751 */
752 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
753 kref_get(&tcon->crfid.refcount);
754
755 mutex_unlock(&tcon->crfid.fid_mutex);
756
757 if (rc == 0) {
758 /* close extra handle outside of crit sec */
759 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
760 }
761 goto oshr_free;
762 }
763
764 /* Cached root is still invalid, continue normaly */
765
7dcc82c2
SF		 766 if (rc) {
767 if (rc == -EREMCHG) {
768 tcon->need_reconnect = true;
769 printk_once(KERN_WARNING "server share %s deleted\n",
770 tcon->treeName);
771 }
b0f6df73 772 goto oshr_exit;
7dcc82c2 773 }
b0f6df73 774
d2f15428
SF		 775 atomic_inc(&tcon->num_remote_opens);
776
b0f6df73
RS		 777 o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
778 oparms.fid->persistent_fid = o_rsp->PersistentFileId;
779 oparms.fid->volatile_fid = o_rsp->VolatileFileId;
780#ifdef CONFIG_CIFS_DEBUG2
781 oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
782#endif /* CIFS_DEBUG2 */
783
b0f6df73
RS		 784 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
785 tcon->crfid.tcon = tcon;
786 tcon->crfid.is_valid = true;
787 kref_init(&tcon->crfid.refcount);
b0f6df73 788
89a5bfa3 789 /* BB TBD check to see if oplock level check can be removed below */
2f94a312
RS		 790 if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
791 kref_get(&tcon->crfid.refcount);
d9191319 792 tcon->crfid.has_lease = true;
89a5bfa3
SF		 793 smb2_parse_contexts(server, o_rsp,
794 &oparms.fid->epoch,
795 oparms.fid->lease_key, &oplock, NULL);
2f94a312
RS		 796 } else
797 goto oshr_exit;
b0f6df73
RS		 798
799 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
800 if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
801 goto oshr_exit;
4811e309 802 if (!smb2_validate_and_copy_iov(
b0f6df73
RS		 803 le16_to_cpu(qi_rsp->OutputBufferOffset),
804 sizeof(struct smb2_file_all_info),
805 &rsp_iov[1], sizeof(struct smb2_file_all_info),
4811e309 806 (char *)&tcon->crfid.file_all_info))
720aec01 807 tcon->crfid.file_all_info_is_valid = true;
b0f6df73 808
7e5a70ad 809oshr_exit:
a93864d9 810 mutex_unlock(&tcon->crfid.fid_mutex);
7e5a70ad 811oshr_free:
b0f6df73
RS		 812 SMB2_open_free(&rqst[0]);
813 SMB2_query_info_free(&rqst[1]);
814 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
815 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3d4ef9a1
SF		 816 return rc;
817}
818
af6a12ea
SF		 819static void
820smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
821{
822 int rc;
823 __le16 srch_path = 0; /* Null - open root of share */
824 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
825 struct cifs_open_parms oparms;
826 struct cifs_fid fid;
3d4ef9a1 827 bool no_cached_open = tcon->nohandlecache;
af6a12ea
SF		 828
829 oparms.tcon = tcon;
830 oparms.desired_access = FILE_READ_ATTRIBUTES;
831 oparms.disposition = FILE_OPEN;
832 oparms.create_options = 0;
833 oparms.fid = &fid;
834 oparms.reconnect = false;
835
3d4ef9a1 836 if (no_cached_open)
9d874c36
RS		 837 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
838 NULL);
3d4ef9a1
SF		 839 else
840 rc = open_shroot(xid, tcon, &fid);
841
af6a12ea
SF		 842 if (rc)
843 return;
844
c481e9fe 845 SMB3_request_interfaces(xid, tcon);
c481e9fe 846
af6a12ea
SF		 847 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
848 FS_ATTRIBUTE_INFORMATION);
849 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
850 FS_DEVICE_INFORMATION);
21ba3845
SF		 851 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
852 FS_VOLUME_INFORMATION);
af6a12ea
SF		 853 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
854 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
3d4ef9a1
SF		 855 if (no_cached_open)
856 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
9da6ec77
RS		 857 else
858 close_shroot(&tcon->crfid);
af6a12ea
SF		 859}
860
34f62640
SF		 861static void
862smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
863{
864 int rc;
865 __le16 srch_path = 0; /* Null - open root of share */
866 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
867 struct cifs_open_parms oparms;
868 struct cifs_fid fid;
869
870 oparms.tcon = tcon;
871 oparms.desired_access = FILE_READ_ATTRIBUTES;
872 oparms.disposition = FILE_OPEN;
873 oparms.create_options = 0;
874 oparms.fid = &fid;
875 oparms.reconnect = false;
876
9d874c36 877 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
34f62640
SF		 878 if (rc)
879 return;
880
2167114c
SF		 881 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
882 FS_ATTRIBUTE_INFORMATION);
883 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
884 FS_DEVICE_INFORMATION);
34f62640 885 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
34f62640
SF		 886}
887
2503a0db
PS		 888static int
889smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
890 struct cifs_sb_info *cifs_sb, const char *full_path)
891{
892 int rc;
2503a0db 893 __le16 *utf16_path;
2e44b288 894 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 895 struct cifs_open_parms oparms;
896 struct cifs_fid fid;
2503a0db 897
a93864d9 898 if ((*full_path == 0) && tcon->crfid.is_valid)
3d4ef9a1
SF		 899 return 0;
900
2503a0db
PS		 901 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
902 if (!utf16_path)
903 return -ENOMEM;
904
064f6047
PS		 905 oparms.tcon = tcon;
906 oparms.desired_access = FILE_READ_ATTRIBUTES;
907 oparms.disposition = FILE_OPEN;
5e19697b
SF		 908 if (backup_cred(cifs_sb))
909 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
910 else
911 oparms.create_options = 0;
064f6047 912 oparms.fid = &fid;
9cbc0b73 913 oparms.reconnect = false;
064f6047 914
9d874c36 915 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2503a0db
PS		 916 if (rc) {
917 kfree(utf16_path);
918 return rc;
919 }
920
064f6047 921 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2503a0db
PS		 922 kfree(utf16_path);
923 return rc;
924}
925
be4cb9e3
PS		 926static int
927smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
928 struct cifs_sb_info *cifs_sb, const char *full_path,
929 u64 *uniqueid, FILE_ALL_INFO *data)
930{
931 *uniqueid = le64_to_cpu(data->IndexNumber);
932 return 0;
933}
934
b7546bc5
PS		 935static int
936smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
937 struct cifs_fid *fid, FILE_ALL_INFO *data)
938{
939 int rc;
940 struct smb2_file_all_info *smb2_data;
941
1bbe4997 942 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
b7546bc5
PS		 943 GFP_KERNEL);
944 if (smb2_data == NULL)
945 return -ENOMEM;
946
947 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
948 smb2_data);
949 if (!rc)
950 move_smb2_info_to_cifs(data, smb2_data);
951 kfree(smb2_data);
952 return rc;
953}
954
1368f155 955#ifdef CONFIG_CIFS_XATTR
95907fea
RS		 956static ssize_t
957move_smb2_ea_to_cifs(char *dst, size_t dst_size,
958 struct smb2_file_full_ea_info *src, size_t src_size,
959 const unsigned char *ea_name)
960{
961 int rc = 0;
962 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
963 char *name, *value;
0c5d6cb6 964 size_t buf_size = dst_size;
95907fea
RS		 965 size_t name_len, value_len, user_name_len;
966
967 while (src_size > 0) {
968 name = &src->ea_data[0];
969 name_len = (size_t)src->ea_name_length;
970 value = &src->ea_data[src->ea_name_length + 1];
971 value_len = (size_t)le16_to_cpu(src->ea_value_length);
972
a205d500 973 if (name_len == 0)
95907fea 974 break;
95907fea
RS		 975
976 if (src_size < 8 + name_len + 1 + value_len) {
977 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
978 rc = -EIO;
979 goto out;
980 }
981
982 if (ea_name) {
983 if (ea_name_len == name_len &&
984 memcmp(ea_name, name, name_len) == 0) {
985 rc = value_len;
986 if (dst_size == 0)
987 goto out;
988 if (dst_size < value_len) {
989 rc = -ERANGE;
990 goto out;
991 }
992 memcpy(dst, value, value_len);
993 goto out;
994 }
995 } else {
996 /* 'user.' plus a terminating null */
997 user_name_len = 5 + 1 + name_len;
998
0c5d6cb6
RS		 999 if (buf_size == 0) {
1000 /* skip copy - calc size only */
1001 rc += user_name_len;
1002 } else if (dst_size >= user_name_len) {
95907fea
RS		 1003 dst_size -= user_name_len;
1004 memcpy(dst, "user.", 5);
1005 dst += 5;
1006 memcpy(dst, src->ea_data, name_len);
1007 dst += name_len;
1008 *dst = 0;
1009 ++dst;
0c5d6cb6 1010 rc += user_name_len;
95907fea
RS		 1011 } else {
1012 /* stop before overrun buffer */
1013 rc = -ERANGE;
1014 break;
1015 }
1016 }
1017
1018 if (!src->next_entry_offset)
1019 break;
1020
1021 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1022 /* stop before overrun buffer */
1023 rc = -ERANGE;
1024 break;
1025 }
1026 src_size -= le32_to_cpu(src->next_entry_offset);
1027 src = (void *)((char *)src +
1028 le32_to_cpu(src->next_entry_offset));
1029 }
1030
1031 /* didn't find the named attribute */
1032 if (ea_name)
1033 rc = -ENODATA;
1034
1035out:
1036 return (ssize_t)rc;
1037}
1038
1039static ssize_t
1040smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1041 const unsigned char *path, const unsigned char *ea_name,
1042 char *ea_data, size_t buf_size,
1043 struct cifs_sb_info *cifs_sb)
1044{
1045 int rc;
1046 __le16 *utf16_path;
f9793b6f
RS		 1047 struct kvec rsp_iov = {NULL, 0};
1048 int buftype = CIFS_NO_BUFFER;
1049 struct smb2_query_info_rsp *rsp;
1050 struct smb2_file_full_ea_info *info = NULL;
95907fea
RS		 1051
1052 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1053 if (!utf16_path)
1054 return -ENOMEM;
1055
f9793b6f
RS		 1056 rc = smb2_query_info_compound(xid, tcon, utf16_path,
1057 FILE_READ_EA,
1058 FILE_FULL_EA_INFORMATION,
1059 SMB2_O_INFO_FILE,
c4627e66
RS		 1060 CIFSMaxBufSize -
1061 MAX_SMB2_CREATE_RESPONSE_SIZE -
1062 MAX_SMB2_CLOSE_RESPONSE_SIZE,
f9793b6f 1063 &rsp_iov, &buftype, cifs_sb);
95907fea 1064 if (rc) {
f9793b6f
RS		 1065 /*
1066 * If ea_name is NULL (listxattr) and there are no EAs,
1067 * return 0 as it's not an error. Otherwise, the specified
1068 * ea_name was not found.
1069 */
1070 if (!ea_name && rc == -ENODATA)
1071 rc = 0;
1072 goto qeas_exit;
95907fea
RS		 1073 }
1074
f9793b6f
RS		 1075 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1076 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1077 le32_to_cpu(rsp->OutputBufferLength),
1078 &rsp_iov,
1079 sizeof(struct smb2_file_full_ea_info));
1080 if (rc)
1081 goto qeas_exit;
95907fea 1082
f9793b6f
RS		 1083 info = (struct smb2_file_full_ea_info *)(
1084 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1085 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1086 le32_to_cpu(rsp->OutputBufferLength), ea_name);
95907fea 1087
f9793b6f
RS		 1088 qeas_exit:
1089 kfree(utf16_path);
1090 free_rsp_buf(buftype, rsp_iov.iov_base);
95907fea
RS		 1091 return rc;
1092}
1093
5517554e
RS		 1094
1095static int
1096smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1097 const char *path, const char *ea_name, const void *ea_value,
1098 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1099 struct cifs_sb_info *cifs_sb)
1100{
0967e545 1101 struct cifs_ses *ses = tcon->ses;
0967e545 1102 __le16 *utf16_path = NULL;
5517554e 1103 int ea_name_len = strlen(ea_name);
0967e545 1104 int flags = 0;
5517554e 1105 int len;
0967e545
RS		 1106 struct smb_rqst rqst[3];
1107 int resp_buftype[3];
1108 struct kvec rsp_iov[3];
1109 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1110 struct cifs_open_parms oparms;
1111 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1112 struct cifs_fid fid;
1113 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1114 unsigned int size[1];
1115 void *data[1];
1116 struct smb2_file_full_ea_info *ea = NULL;
1117 struct kvec close_iov[1];
1118 int rc;
1119
1120 if (smb3_encryption_required(tcon))
1121 flags |= CIFS_TRANSFORM_REQ;
5517554e
RS		 1122
1123 if (ea_name_len > 255)
1124 return -EINVAL;
1125
1126 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1127 if (!utf16_path)
1128 return -ENOMEM;
1129
0967e545
RS		 1130 memset(rqst, 0, sizeof(rqst));
1131 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1132 memset(rsp_iov, 0, sizeof(rsp_iov));
1133
21094641
RS		 1134 if (ses->server->ops->query_all_EAs) {
1135 if (!ea_value) {
1136 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1137 ea_name, NULL, 0,
1138 cifs_sb);
1139 if (rc == -ENODATA)
1140 goto sea_exit;
1141 }
1142 }
1143
0967e545
RS		 1144 /* Open */
1145 memset(&open_iov, 0, sizeof(open_iov));
1146 rqst[0].rq_iov = open_iov;
1147 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1148
1149 memset(&oparms, 0, sizeof(oparms));
5517554e
RS		 1150 oparms.tcon = tcon;
1151 oparms.desired_access = FILE_WRITE_EA;
1152 oparms.disposition = FILE_OPEN;
5e19697b
SF		 1153 if (backup_cred(cifs_sb))
1154 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1155 else
1156 oparms.create_options = 0;
5517554e
RS		 1157 oparms.fid = &fid;
1158 oparms.reconnect = false;
1159
0967e545
RS		 1160 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1161 if (rc)
1162 goto sea_exit;
e77fe73c 1163 smb2_set_next_command(tcon, &rqst[0]);
0967e545
RS		 1164
1165
1166 /* Set Info */
1167 memset(&si_iov, 0, sizeof(si_iov));
1168 rqst[1].rq_iov = si_iov;
1169 rqst[1].rq_nvec = 1;
5517554e
RS		 1170
1171 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1172 ea = kzalloc(len, GFP_KERNEL);
1173 if (ea == NULL) {
0967e545
RS		 1174 rc = -ENOMEM;
1175 goto sea_exit;
5517554e
RS		 1176 }
1177
1178 ea->ea_name_length = ea_name_len;
1179 ea->ea_value_length = cpu_to_le16(ea_value_len);
1180 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1181 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1182
0967e545
RS		 1183 size[0] = len;
1184 data[0] = ea;
1185
1186 rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1187 COMPOUND_FID, current->tgid,
1188 FILE_FULL_EA_INFORMATION,
1189 SMB2_O_INFO_FILE, 0, data, size);
e77fe73c 1190 smb2_set_next_command(tcon, &rqst[1]);
0967e545 1191 smb2_set_related(&rqst[1]);
6aa0c114 1192
5517554e 1193
0967e545
RS		 1194 /* Close */
1195 memset(&close_iov, 0, sizeof(close_iov));
1196 rqst[2].rq_iov = close_iov;
1197 rqst[2].rq_nvec = 1;
43f8a6a7 1198 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
0967e545
RS		 1199 smb2_set_related(&rqst[2]);
1200
1201 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1202 resp_buftype, rsp_iov);
d2f15428 1203 /* no need to bump num_remote_opens because handle immediately closed */
0967e545
RS		 1204
1205 sea_exit:
1206 kfree(ea);
1207 kfree(utf16_path);
1208 SMB2_open_free(&rqst[0]);
1209 SMB2_set_info_free(&rqst[1]);
1210 SMB2_close_free(&rqst[2]);
1211 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1212 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1213 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
5517554e
RS		 1214 return rc;
1215}
1368f155 1216#endif
5517554e 1217
9094fad1
PS		 1218static bool
1219smb2_can_echo(struct TCP_Server_Info *server)
1220{
1221 return server->echoes;
1222}
1223
d60622eb
PS		 1224static void
1225smb2_clear_stats(struct cifs_tcon *tcon)
1226{
d60622eb 1227 int i;
a205d500 1228
d60622eb
PS		 1229 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1230 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1231 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1232 }
d60622eb
PS		 1233}
1234
769ee6a4
SF		 1235static void
1236smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1237{
1238 seq_puts(m, "\n\tShare Capabilities:");
1239 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1240 seq_puts(m, " DFS,");
1241 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1242 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1243 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1244 seq_puts(m, " SCALEOUT,");
1245 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1246 seq_puts(m, " CLUSTER,");
1247 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1248 seq_puts(m, " ASYMMETRIC,");
1249 if (tcon->capabilities == 0)
1250 seq_puts(m, " None");
af6a12ea
SF		 1251 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1252 seq_puts(m, " Aligned,");
1253 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1254 seq_puts(m, " Partition Aligned,");
1255 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1256 seq_puts(m, " SSD,");
1257 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1258 seq_puts(m, " TRIM-support,");
1259
769ee6a4 1260 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
e0386e44 1261 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
af6a12ea
SF		 1262 if (tcon->perf_sector_size)
1263 seq_printf(m, "\tOptimal sector size: 0x%x",
1264 tcon->perf_sector_size);
e0386e44 1265 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
769ee6a4
SF		 1266}
1267
d60622eb
PS		 1268static void
1269smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1270{
d60622eb
PS		 1271 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1272 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1995d28f
SF		 1273
1274 /*
1275 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1276 * totals (requests sent) since those SMBs are per-session not per tcon
1277 */
52ce1ac4
SF		 1278 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1279 (long long)(tcon->bytes_read),
1280 (long long)(tcon->bytes_written));
fae8044c
SF		 1281 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1282 atomic_read(&tcon->num_local_opens),
1283 atomic_read(&tcon->num_remote_opens));
1995d28f 1284 seq_printf(m, "\nTreeConnects: %d total %d failed",
d60622eb
PS		 1285 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1286 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1995d28f 1287 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
d60622eb
PS		 1288 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1289 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1995d28f 1290 seq_printf(m, "\nCreates: %d total %d failed",
d60622eb
PS		 1291 atomic_read(&sent[SMB2_CREATE_HE]),
1292 atomic_read(&failed[SMB2_CREATE_HE]));
1995d28f 1293 seq_printf(m, "\nCloses: %d total %d failed",
d60622eb
PS		 1294 atomic_read(&sent[SMB2_CLOSE_HE]),
1295 atomic_read(&failed[SMB2_CLOSE_HE]));
1995d28f 1296 seq_printf(m, "\nFlushes: %d total %d failed",
d60622eb
PS		 1297 atomic_read(&sent[SMB2_FLUSH_HE]),
1298 atomic_read(&failed[SMB2_FLUSH_HE]));
1995d28f 1299 seq_printf(m, "\nReads: %d total %d failed",
d60622eb
PS		 1300 atomic_read(&sent[SMB2_READ_HE]),
1301 atomic_read(&failed[SMB2_READ_HE]));
1995d28f 1302 seq_printf(m, "\nWrites: %d total %d failed",
d60622eb
PS		 1303 atomic_read(&sent[SMB2_WRITE_HE]),
1304 atomic_read(&failed[SMB2_WRITE_HE]));
1995d28f 1305 seq_printf(m, "\nLocks: %d total %d failed",
d60622eb
PS		 1306 atomic_read(&sent[SMB2_LOCK_HE]),
1307 atomic_read(&failed[SMB2_LOCK_HE]));
1995d28f 1308 seq_printf(m, "\nIOCTLs: %d total %d failed",
d60622eb
PS		 1309 atomic_read(&sent[SMB2_IOCTL_HE]),
1310 atomic_read(&failed[SMB2_IOCTL_HE]));
1995d28f 1311 seq_printf(m, "\nQueryDirectories: %d total %d failed",
d60622eb
PS		 1312 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1313 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1995d28f 1314 seq_printf(m, "\nChangeNotifies: %d total %d failed",
d60622eb
PS		 1315 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1316 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1995d28f 1317 seq_printf(m, "\nQueryInfos: %d total %d failed",
d60622eb
PS		 1318 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1319 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1995d28f 1320 seq_printf(m, "\nSetInfos: %d total %d failed",
d60622eb
PS		 1321 atomic_read(&sent[SMB2_SET_INFO_HE]),
1322 atomic_read(&failed[SMB2_SET_INFO_HE]));
1323 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1324 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1325 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
d60622eb
PS		 1326}
1327
f0df737e
PS		 1328static void
1329smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1330{
2b0143b5 1331 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
53ef1016
PS		 1332 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1333
f0df737e
PS		 1334 cfile->fid.persistent_fid = fid->persistent_fid;
1335 cfile->fid.volatile_fid = fid->volatile_fid;
dfe33f9a
SF		 1336#ifdef CONFIG_CIFS_DEBUG2
1337 cfile->fid.mid = fid->mid;
1338#endif /* CIFS_DEBUG2 */
42873b0a
PS		 1339 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1340 &fid->purge_cache);
18cceb6a 1341 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
94f87371 1342 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
f0df737e
PS		 1343}
1344
760ad0ca 1345static void
f0df737e
PS		 1346smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1347 struct cifs_fid *fid)
1348{
760ad0ca 1349 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
f0df737e
PS		 1350}
1351
43f8a6a7
SF		 1352static void
1353smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1354 struct cifsFileInfo *cfile)
1355{
1356 struct smb2_file_network_open_info file_inf;
1357 struct inode *inode;
1358 int rc;
1359
1360 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1361 cfile->fid.volatile_fid, &file_inf);
1362 if (rc)
1363 return;
1364
1365 inode = d_inode(cfile->dentry);
1366
1367 spin_lock(&inode->i_lock);
1368 CIFS_I(inode)->time = jiffies;
1369
1370 /* Creation time should not need to be updated on close */
1371 if (file_inf.LastWriteTime)
1372 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1373 if (file_inf.ChangeTime)
1374 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1375 if (file_inf.LastAccessTime)
1376 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1377
1378 /*
1379 * i_blocks is not related to (i_size / i_blksize),
1380 * but instead 512 byte (2**9) size is required for
1381 * calculating num blocks.
1382 */
1383 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1384 inode->i_blocks =
1385 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1386
1387 /* End of file and Attributes should not have to be updated on close */
1388 spin_unlock(&inode->i_lock);
1389}
1390
41c1358e
SF		 1391static int
1392SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1393 u64 persistent_fid, u64 volatile_fid,
1394 struct copychunk_ioctl *pcchunk)
1395{
1396 int rc;
1397 unsigned int ret_data_len;
1398 struct resume_key_req *res_key;
1399
1400 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1401 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
153322f7 1402 NULL, 0 /* no input */, CIFSMaxBufSize,
41c1358e
SF		 1403 (char **)&res_key, &ret_data_len);
1404
1405 if (rc) {
3175eb9b 1406 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
41c1358e
SF		 1407 goto req_res_key_exit;
1408 }
1409 if (ret_data_len < sizeof(struct resume_key_req)) {
3175eb9b 1410 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
41c1358e
SF		 1411 rc = -EINVAL;
1412 goto req_res_key_exit;
1413 }
1414 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1415
1416req_res_key_exit:
1417 kfree(res_key);
1418 return rc;
1419}
1420
f5b05d62
RS		 1421static int
1422smb2_ioctl_query_info(const unsigned int xid,
8d8b26e5
RS		 1423 struct cifs_tcon *tcon,
1424 __le16 *path, int is_dir,
f5b05d62
RS		 1425 unsigned long p)
1426{
f5b05d62
RS		 1427 struct cifs_ses *ses = tcon->ses;
1428 char __user *arg = (char __user *)p;
1429 struct smb_query_info qi;
1430 struct smb_query_info __user *pqi;
1431 int rc = 0;
1432 int flags = 0;
f5778c39
RS		 1433 struct smb2_query_info_rsp *qi_rsp = NULL;
1434 struct smb2_ioctl_rsp *io_rsp = NULL;
8d8b26e5
RS		 1435 void *buffer = NULL;
1436 struct smb_rqst rqst[3];
1437 int resp_buftype[3];
1438 struct kvec rsp_iov[3];
1439 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1440 struct cifs_open_parms oparms;
1441 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1442 struct cifs_fid fid;
1443 struct kvec qi_iov[1];
f5778c39 1444 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
0e90696d 1445 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
8d8b26e5 1446 struct kvec close_iov[1];
0e90696d
RS		 1447 unsigned int size[2];
1448 void *data[2];
8d8b26e5
RS		 1449
1450 memset(rqst, 0, sizeof(rqst));
1451 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1452 memset(rsp_iov, 0, sizeof(rsp_iov));
f5b05d62
RS		 1453
1454 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1455 return -EFAULT;
1456
1457 if (qi.output_buffer_length > 1024)
1458 return -EINVAL;
1459
1460 if (!ses || !(ses->server))
1461 return -EIO;
1462
1463 if (smb3_encryption_required(tcon))
1464 flags |= CIFS_TRANSFORM_REQ;
1465
cfaa1181
ME		 1466 buffer = memdup_user(arg + sizeof(struct smb_query_info),
1467 qi.output_buffer_length);
1468 if (IS_ERR(buffer))
1469 return PTR_ERR(buffer);
f5b05d62 1470
8d8b26e5
RS		 1471 /* Open */
1472 memset(&open_iov, 0, sizeof(open_iov));
1473 rqst[0].rq_iov = open_iov;
1474 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1475
1476 memset(&oparms, 0, sizeof(oparms));
1477 oparms.tcon = tcon;
8d8b26e5
RS		 1478 oparms.disposition = FILE_OPEN;
1479 if (is_dir)
1480 oparms.create_options = CREATE_NOT_FILE;
1481 else
1482 oparms.create_options = CREATE_NOT_DIR;
1483 oparms.fid = &fid;
1484 oparms.reconnect = false;
1485
efac779b
RS		 1486 if (qi.flags & PASSTHRU_FSCTL) {
1487 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1488 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1489 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
46e66619
SF		 1490 break;
1491 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1492 oparms.desired_access = GENERIC_ALL;
1493 break;
1494 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1495 oparms.desired_access = GENERIC_READ;
1496 break;
1497 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1498 oparms.desired_access = GENERIC_WRITE;
efac779b
RS		 1499 break;
1500 }
0e90696d
RS		 1501 } else if (qi.flags & PASSTHRU_SET_INFO) {
1502 oparms.desired_access = GENERIC_WRITE;
1503 } else {
1504 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
efac779b
RS		 1505 }
1506
8d8b26e5
RS		 1507 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1508 if (rc)
1509 goto iqinf_exit;
e77fe73c 1510 smb2_set_next_command(tcon, &rqst[0]);
8d8b26e5
RS		 1511
1512 /* Query */
31ba4331
SF		 1513 if (qi.flags & PASSTHRU_FSCTL) {
1514 /* Can eventually relax perm check since server enforces too */
1515 if (!capable(CAP_SYS_ADMIN))
1516 rc = -EPERM;
f5778c39
RS		 1517 else {
1518 memset(&io_iov, 0, sizeof(io_iov));
1519 rqst[1].rq_iov = io_iov;
1520 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1521
1522 rc = SMB2_ioctl_init(tcon, &rqst[1],
1523 COMPOUND_FID, COMPOUND_FID,
efac779b
RS		 1524 qi.info_type, true, buffer,
1525 qi.output_buffer_length,
1526 CIFSMaxBufSize);
f5778c39 1527 }
0e90696d
RS		 1528 } else if (qi.flags == PASSTHRU_SET_INFO) {
1529 /* Can eventually relax perm check since server enforces too */
1530 if (!capable(CAP_SYS_ADMIN))
1531 rc = -EPERM;
1532 else {
1533 memset(&si_iov, 0, sizeof(si_iov));
1534 rqst[1].rq_iov = si_iov;
1535 rqst[1].rq_nvec = 1;
1536
1537 size[0] = 8;
1538 data[0] = buffer;
1539
1540 rc = SMB2_set_info_init(tcon, &rqst[1],
1541 COMPOUND_FID, COMPOUND_FID,
1542 current->tgid,
1543 FILE_END_OF_FILE_INFORMATION,
1544 SMB2_O_INFO_FILE, 0, data, size);
1545 }
31ba4331
SF		 1546 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1547 memset(&qi_iov, 0, sizeof(qi_iov));
1548 rqst[1].rq_iov = qi_iov;
1549 rqst[1].rq_nvec = 1;
1550
1551 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1552 COMPOUND_FID, qi.file_info_class,
1553 qi.info_type, qi.additional_information,
f5b05d62
RS		 1554 qi.input_buffer_length,
1555 qi.output_buffer_length, buffer);
31ba4331 1556 } else { /* unknown flags */
3175eb9b 1557 cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
31ba4331
SF		 1558 rc = -EINVAL;
1559 }
1560
f5b05d62
RS		 1561 if (rc)
1562 goto iqinf_exit;
e77fe73c 1563 smb2_set_next_command(tcon, &rqst[1]);
8d8b26e5
RS		 1564 smb2_set_related(&rqst[1]);
1565
1566 /* Close */
1567 memset(&close_iov, 0, sizeof(close_iov));
1568 rqst[2].rq_iov = close_iov;
1569 rqst[2].rq_nvec = 1;
f5b05d62 1570
43f8a6a7 1571 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
f5b05d62
RS		 1572 if (rc)
1573 goto iqinf_exit;
8d8b26e5 1574 smb2_set_related(&rqst[2]);
f5b05d62 1575
8d8b26e5
RS		 1576 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1577 resp_buftype, rsp_iov);
1578 if (rc)
1579 goto iqinf_exit;
d2f15428
SF		 1580
1581 /* No need to bump num_remote_opens since handle immediately closed */
f5778c39
RS		 1582 if (qi.flags & PASSTHRU_FSCTL) {
1583 pqi = (struct smb_query_info __user *)arg;
1584 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1585 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1586 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
5242fcb7 1587 if (qi.input_buffer_length > 0 &&
2b1116bb
ME		 1588 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1589 > rsp_iov[1].iov_len)
1590 goto e_fault;
1591
1592 if (copy_to_user(&pqi->input_buffer_length,
1593 &qi.input_buffer_length,
1594 sizeof(qi.input_buffer_length)))
1595 goto e_fault;
1596
5242fcb7
RS		 1597 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1598 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
2b1116bb
ME		 1599 qi.input_buffer_length))
1600 goto e_fault;
f5778c39
RS		 1601 } else {
1602 pqi = (struct smb_query_info __user *)arg;
1603 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1604 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1605 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
2b1116bb
ME		 1606 if (copy_to_user(&pqi->input_buffer_length,
1607 &qi.input_buffer_length,
1608 sizeof(qi.input_buffer_length)))
1609 goto e_fault;
1610
1611 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1612 qi.input_buffer_length))
1613 goto e_fault;
f5b05d62
RS		 1614 }
1615
1616 iqinf_exit:
8d8b26e5
RS		 1617 kfree(buffer);
1618 SMB2_open_free(&rqst[0]);
f5778c39
RS		 1619 if (qi.flags & PASSTHRU_FSCTL)
1620 SMB2_ioctl_free(&rqst[1]);
1621 else
1622 SMB2_query_info_free(&rqst[1]);
1623
8d8b26e5
RS		 1624 SMB2_close_free(&rqst[2]);
1625 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1626 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1627 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
f5b05d62 1628 return rc;
2b1116bb
ME		 1629
1630e_fault:
1631 rc = -EFAULT;
1632 goto iqinf_exit;
f5b05d62
RS		 1633}
1634
620d8745 1635static ssize_t
312bbc59 1636smb2_copychunk_range(const unsigned int xid,
41c1358e
SF		 1637 struct cifsFileInfo *srcfile,
1638 struct cifsFileInfo *trgtfile, u64 src_off,
1639 u64 len, u64 dest_off)
1640{
1641 int rc;
1642 unsigned int ret_data_len;
1643 struct copychunk_ioctl *pcchunk;
9bf0c9cd
SF		 1644 struct copychunk_ioctl_rsp *retbuf = NULL;
1645 struct cifs_tcon *tcon;
1646 int chunks_copied = 0;
1647 bool chunk_sizes_updated = false;
620d8745 1648 ssize_t bytes_written, total_bytes_written = 0;
41c1358e
SF		 1649
1650 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1651
1652 if (pcchunk == NULL)
1653 return -ENOMEM;
1654
a205d500 1655 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
41c1358e
SF		 1656 /* Request a key from the server to identify the source of the copy */
1657 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1658 srcfile->fid.persistent_fid,
1659 srcfile->fid.volatile_fid, pcchunk);
1660
1661 /* Note: request_res_key sets res_key null only if rc !=0 */
1662 if (rc)
9bf0c9cd 1663 goto cchunk_out;
41c1358e
SF		 1664
1665 /* For now array only one chunk long, will make more flexible later */
bc09d141 1666 pcchunk->ChunkCount = cpu_to_le32(1);
41c1358e 1667 pcchunk->Reserved = 0;
41c1358e
SF		 1668 pcchunk->Reserved2 = 0;
1669
9bf0c9cd 1670 tcon = tlink_tcon(trgtfile->tlink);
41c1358e 1671
9bf0c9cd
SF		 1672 while (len > 0) {
1673 pcchunk->SourceOffset = cpu_to_le64(src_off);
1674 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1675 pcchunk->Length =
1676 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
41c1358e 1677
9bf0c9cd
SF		 1678 /* Request server copy to target from src identified by key */
1679 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1680 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
63a83b86 1681 true /* is_fsctl */, (char *)pcchunk,
153322f7
SF		 1682 sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1683 (char **)&retbuf, &ret_data_len);
9bf0c9cd
SF		 1684 if (rc == 0) {
1685 if (ret_data_len !=
1686 sizeof(struct copychunk_ioctl_rsp)) {
3175eb9b 1687 cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
9bf0c9cd
SF		 1688 rc = -EIO;
1689 goto cchunk_out;
1690 }
1691 if (retbuf->TotalBytesWritten == 0) {
1692 cifs_dbg(FYI, "no bytes copied\n");
1693 rc = -EIO;
1694 goto cchunk_out;
1695 }
1696 /*
1697 * Check if server claimed to write more than we asked
1698 */
1699 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1700 le32_to_cpu(pcchunk->Length)) {
3175eb9b 1701 cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
9bf0c9cd
SF		 1702 rc = -EIO;
1703 goto cchunk_out;
1704 }
1705 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
3175eb9b 1706 cifs_tcon_dbg(VFS, "invalid num chunks written\n");
9bf0c9cd
SF		 1707 rc = -EIO;
1708 goto cchunk_out;
1709 }
1710 chunks_copied++;
1711
620d8745
SP		 1712 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1713 src_off += bytes_written;
1714 dest_off += bytes_written;
1715 len -= bytes_written;
1716 total_bytes_written += bytes_written;
9bf0c9cd 1717
620d8745 1718 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
9bf0c9cd
SF		 1719 le32_to_cpu(retbuf->ChunksWritten),
1720 le32_to_cpu(retbuf->ChunkBytesWritten),
620d8745 1721 bytes_written);
9bf0c9cd
SF		 1722 } else if (rc == -EINVAL) {
1723 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1724 goto cchunk_out;
1725
1726 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1727 le32_to_cpu(retbuf->ChunksWritten),
1728 le32_to_cpu(retbuf->ChunkBytesWritten),
1729 le32_to_cpu(retbuf->TotalBytesWritten));
1730
1731 /*
1732 * Check if this is the first request using these sizes,
1733 * (ie check if copy succeed once with original sizes
1734 * and check if the server gave us different sizes after
1735 * we already updated max sizes on previous request).
1736 * if not then why is the server returning an error now
1737 */
1738 if ((chunks_copied != 0) || chunk_sizes_updated)
1739 goto cchunk_out;
1740
1741 /* Check that server is not asking us to grow size */
1742 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1743 tcon->max_bytes_chunk)
1744 tcon->max_bytes_chunk =
1745 le32_to_cpu(retbuf->ChunkBytesWritten);
1746 else
1747 goto cchunk_out; /* server gave us bogus size */
1748
1749 /* No need to change MaxChunks since already set to 1 */
1750 chunk_sizes_updated = true;
2477bc58
SP		 1751 } else
1752 goto cchunk_out;
9bf0c9cd 1753 }
41c1358e 1754
9bf0c9cd 1755cchunk_out:
41c1358e 1756 kfree(pcchunk);
24df1483 1757 kfree(retbuf);
620d8745
SP		 1758 if (rc)
1759 return rc;
1760 else
1761 return total_bytes_written;
41c1358e
SF		 1762}
1763
7a5cfb19
PS		 1764static int
1765smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1766 struct cifs_fid *fid)
1767{
1768 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1769}
1770
09a4707e
PS		 1771static unsigned int
1772smb2_read_data_offset(char *buf)
1773{
1774 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
a205d500 1775
09a4707e
PS		 1776 return rsp->DataOffset;
1777}
1778
1779static unsigned int
74dcf418 1780smb2_read_data_length(char *buf, bool in_remaining)
09a4707e
PS		 1781{
1782 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
74dcf418
LL		 1783
1784 if (in_remaining)
1785 return le32_to_cpu(rsp->DataRemaining);
1786
09a4707e
PS		 1787 return le32_to_cpu(rsp->DataLength);
1788}
1789
d8e05039
PS		 1790
1791static int
db8b631d 1792smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
d8e05039
PS		 1793 struct cifs_io_parms *parms, unsigned int *bytes_read,
1794 char **buf, int *buf_type)
1795{
db8b631d
SF		 1796 parms->persistent_fid = pfid->persistent_fid;
1797 parms->volatile_fid = pfid->volatile_fid;
d8e05039
PS		 1798 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1799}
1800
009d3443 1801static int
db8b631d 1802smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
009d3443
PS		 1803 struct cifs_io_parms *parms, unsigned int *written,
1804 struct kvec *iov, unsigned long nr_segs)
1805{
1806
db8b631d
SF		 1807 parms->persistent_fid = pfid->persistent_fid;
1808 parms->volatile_fid = pfid->volatile_fid;
009d3443
PS		 1809 return SMB2_write(xid, parms, written, iov, nr_segs);
1810}
1811
d43cc793
SF		 1812/* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1813static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1814 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1815{
1816 struct cifsInodeInfo *cifsi;
1817 int rc;
1818
1819 cifsi = CIFS_I(inode);
1820
1821 /* if file already sparse don't bother setting sparse again */
1822 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1823 return true; /* already sparse */
1824
1825 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1826 return true; /* already not sparse */
1827
1828 /*
1829 * Can't check for sparse support on share the usual way via the
1830 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1831 * since Samba server doesn't set the flag on the share, yet
1832 * supports the set sparse FSCTL and returns sparse correctly
1833 * in the file attributes. If we fail setting sparse though we
1834 * mark that server does not support sparse files for this share
1835 * to avoid repeatedly sending the unsupported fsctl to server
1836 * if the file is repeatedly extended.
1837 */
1838 if (tcon->broken_sparse_sup)
1839 return false;
1840
1841 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1842 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
63a83b86 1843 true /* is_fctl */,
153322f7 1844 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
d43cc793
SF		 1845 if (rc) {
1846 tcon->broken_sparse_sup = true;
1847 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1848 return false;
1849 }
1850
1851 if (setsparse)
1852 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1853 else
1854 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1855
1856 return true;
1857}
1858
c839ff24
PS		 1859static int
1860smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1861 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1862{
1863 __le64 eof = cpu_to_le64(size);
3d1a3745
SF		 1864 struct inode *inode;
1865
1866 /*
1867 * If extending file more than one page make sparse. Many Linux fs
1868 * make files sparse by default when extending via ftruncate
1869 */
2b0143b5 1870 inode = d_inode(cfile->dentry);
3d1a3745
SF		 1871
1872 if (!set_alloc && (size > inode->i_size + 8192)) {
3d1a3745 1873 __u8 set_sparse = 1;
d43cc793
SF		 1874
1875 /* whether set sparse succeeds or not, extend the file */
1876 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
3d1a3745
SF		 1877 }
1878
c839ff24 1879 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3764cbd1 1880 cfile->fid.volatile_fid, cfile->pid, &eof);
c839ff24
PS		 1881}
1882
02b16665
SF		 1883static int
1884smb2_duplicate_extents(const unsigned int xid,
1885 struct cifsFileInfo *srcfile,
1886 struct cifsFileInfo *trgtfile, u64 src_off,
1887 u64 len, u64 dest_off)
1888{
1889 int rc;
1890 unsigned int ret_data_len;
02b16665
SF		 1891 struct duplicate_extents_to_file dup_ext_buf;
1892 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1893
1894 /* server fileays advertise duplicate extent support with this flag */
1895 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1896 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1897 return -EOPNOTSUPP;
1898
1899 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1900 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1901 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1902 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1903 dup_ext_buf.ByteCount = cpu_to_le64(len);
a205d500 1904 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
02b16665
SF		 1905 src_off, dest_off, len);
1906
1907 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1908 if (rc)
1909 goto duplicate_extents_out;
1910
1911 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1912 trgtfile->fid.volatile_fid,
1913 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
63a83b86 1914 true /* is_fsctl */,
51146625 1915 (char *)&dup_ext_buf,
02b16665 1916 sizeof(struct duplicate_extents_to_file),
153322f7 1917 CIFSMaxBufSize, NULL,
02b16665
SF		 1918 &ret_data_len);
1919
1920 if (ret_data_len > 0)
a205d500 1921 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
02b16665
SF		 1922
1923duplicate_extents_out:
1924 return rc;
1925}
02b16665 1926
64a5cfa6
SF		 1927static int
1928smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1929 struct cifsFileInfo *cfile)
1930{
1931 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1932 cfile->fid.volatile_fid);
1933}
1934
b3152e2c
SF		 1935static int
1936smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1937 struct cifsFileInfo *cfile)
1938{
1939 struct fsctl_set_integrity_information_req integr_info;
b3152e2c
SF		 1940 unsigned int ret_data_len;
1941
1942 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1943 integr_info.Flags = 0;
1944 integr_info.Reserved = 0;
1945
1946 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1947 cfile->fid.volatile_fid,
1948 FSCTL_SET_INTEGRITY_INFORMATION,
63a83b86 1949 true /* is_fsctl */,
51146625 1950 (char *)&integr_info,
b3152e2c 1951 sizeof(struct fsctl_set_integrity_information_req),
153322f7 1952 CIFSMaxBufSize, NULL,
b3152e2c
SF		 1953 &ret_data_len);
1954
1955}
1956
e02789a5
SF		 1957/* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1958#define GMT_TOKEN_SIZE 50
1959
153322f7
SF		 1960#define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1961
e02789a5
SF		 1962/*
1963 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1964 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1965 */
834170c8
SF		 1966static int
1967smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1968 struct cifsFileInfo *cfile, void __user *ioc_buf)
1969{
1970 char *retbuf = NULL;
1971 unsigned int ret_data_len = 0;
1972 int rc;
153322f7 1973 u32 max_response_size;
834170c8
SF		 1974 struct smb_snapshot_array snapshot_in;
1975
973189ab
SF		 1976 /*
1977 * On the first query to enumerate the list of snapshots available
1978 * for this volume the buffer begins with 0 (number of snapshots
1979 * which can be returned is zero since at that point we do not know
1980 * how big the buffer needs to be). On the second query,
1981 * it (ret_data_len) is set to number of snapshots so we can
1982 * know to set the maximum response size larger (see below).
1983 */
153322f7
SF		 1984 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
1985 return -EFAULT;
1986
1987 /*
1988 * Note that for snapshot queries that servers like Azure expect that
1989 * the first query be minimal size (and just used to get the number/size
1990 * of previous versions) so response size must be specified as EXACTLY
1991 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1992 * of eight bytes.
1993 */
1994 if (ret_data_len == 0)
1995 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
1996 else
1997 max_response_size = CIFSMaxBufSize;
1998
834170c8
SF		 1999 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2000 cfile->fid.volatile_fid,
2001 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
63a83b86 2002 true /* is_fsctl */,
153322f7 2003 NULL, 0 /* no input data */, max_response_size,
834170c8
SF		 2004 (char **)&retbuf,
2005 &ret_data_len);
2006 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2007 rc, ret_data_len);
2008 if (rc)
2009 return rc;
2010
2011 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2012 /* Fixup buffer */
2013 if (copy_from_user(&snapshot_in, ioc_buf,
2014 sizeof(struct smb_snapshot_array))) {
2015 rc = -EFAULT;
2016 kfree(retbuf);
2017 return rc;
2018 }
834170c8 2019
e02789a5
SF		 2020 /*
2021 * Check for min size, ie not large enough to fit even one GMT
2022 * token (snapshot). On the first ioctl some users may pass in
2023 * smaller size (or zero) to simply get the size of the array
2024 * so the user space caller can allocate sufficient memory
2025 * and retry the ioctl again with larger array size sufficient
2026 * to hold all of the snapshot GMT tokens on the second try.
2027 */
2028 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2029 ret_data_len = sizeof(struct smb_snapshot_array);
2030
2031 /*
2032 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2033 * the snapshot array (of 50 byte GMT tokens) each
2034 * representing an available previous version of the data
2035 */
2036 if (ret_data_len > (snapshot_in.snapshot_array_size +
2037 sizeof(struct smb_snapshot_array)))
2038 ret_data_len = snapshot_in.snapshot_array_size +
2039 sizeof(struct smb_snapshot_array);
834170c8
SF		 2040
2041 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2042 rc = -EFAULT;
2043 }
2044
2045 kfree(retbuf);
2046 return rc;
2047}
2048
d324f08d
PS		 2049static int
2050smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2051 const char *path, struct cifs_sb_info *cifs_sb,
2052 struct cifs_fid *fid, __u16 search_flags,
2053 struct cifs_search_info *srch_inf)
2054{
2055 __le16 *utf16_path;
37478608
RS		 2056 struct smb_rqst rqst[2];
2057 struct kvec rsp_iov[2];
2058 int resp_buftype[2];
2059 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2060 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2061 int rc, flags = 0;
2062 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047 2063 struct cifs_open_parms oparms;
37478608
RS		 2064 struct smb2_query_directory_rsp *qd_rsp = NULL;
2065 struct smb2_create_rsp *op_rsp = NULL;
d324f08d
PS		 2066
2067 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2068 if (!utf16_path)
2069 return -ENOMEM;
2070
37478608
RS		 2071 if (smb3_encryption_required(tcon))
2072 flags |= CIFS_TRANSFORM_REQ;
2073
2074 memset(rqst, 0, sizeof(rqst));
2075 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2076 memset(rsp_iov, 0, sizeof(rsp_iov));
2077
2078 /* Open */
2079 memset(&open_iov, 0, sizeof(open_iov));
2080 rqst[0].rq_iov = open_iov;
2081 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2082
064f6047
PS		 2083 oparms.tcon = tcon;
2084 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2085 oparms.disposition = FILE_OPEN;
5e19697b
SF		 2086 if (backup_cred(cifs_sb))
2087 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2088 else
2089 oparms.create_options = 0;
064f6047 2090 oparms.fid = fid;
9cbc0b73 2091 oparms.reconnect = false;
064f6047 2092
37478608
RS		 2093 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2094 if (rc)
2095 goto qdf_free;
2096 smb2_set_next_command(tcon, &rqst[0]);
d324f08d 2097
37478608 2098 /* Query directory */
d324f08d 2099 srch_inf->entries_in_buffer = 0;
0595751f 2100 srch_inf->index_of_last_entry = 2;
d324f08d 2101
37478608
RS		 2102 memset(&qd_iov, 0, sizeof(qd_iov));
2103 rqst[1].rq_iov = qd_iov;
2104 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2105
2106 rc = SMB2_query_directory_init(xid, tcon, &rqst[1],
2107 COMPOUND_FID, COMPOUND_FID,
2108 0, srch_inf->info_level);
2109 if (rc)
2110 goto qdf_free;
2111
2112 smb2_set_related(&rqst[1]);
2113
2114 rc = compound_send_recv(xid, tcon->ses, flags, 2, rqst,
2115 resp_buftype, rsp_iov);
2116
2117 /* If the open failed there is nothing to do */
2118 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2119 if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2120 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2121 goto qdf_free;
2122 }
2123 fid->persistent_fid = op_rsp->PersistentFileId;
2124 fid->volatile_fid = op_rsp->VolatileFileId;
2125
2126 /* Anything else than ENODATA means a genuine error */
2127 if (rc && rc != -ENODATA) {
064f6047 2128 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
37478608
RS		 2129 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2130 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2131 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2132 goto qdf_free;
2133 }
2134
2135 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2136 if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2137 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2138 tcon->tid, tcon->ses->Suid, 0, 0);
2139 srch_inf->endOfSearch = true;
2140 rc = 0;
2141 goto qdf_free;
2142 }
2143
2144 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2145 srch_inf);
2146 if (rc) {
2147 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2148 tcon->ses->Suid, 0, 0, rc);
2149 goto qdf_free;
d324f08d 2150 }
37478608
RS		 2151 resp_buftype[1] = CIFS_NO_BUFFER;
2152
2153 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2154 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2155
2156 qdf_free:
2157 kfree(utf16_path);
2158 SMB2_open_free(&rqst[0]);
2159 SMB2_query_directory_free(&rqst[1]);
2160 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2161 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
d324f08d
PS		 2162 return rc;
2163}
2164
2165static int
2166smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2167 struct cifs_fid *fid, __u16 search_flags,
2168 struct cifs_search_info *srch_inf)
2169{
2170 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2171 fid->volatile_fid, 0, srch_inf);
2172}
2173
2174static int
2175smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2176 struct cifs_fid *fid)
2177{
2178 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2179}
2180
2e44b288 2181/*
a205d500
CP		 2182 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2183 * the number of credits and return true. Otherwise - return false.
2184 */
2e44b288 2185static bool
66265f13 2186smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2e44b288 2187{
49f466bd 2188 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2e44b288 2189
31473fc4 2190 if (shdr->Status != STATUS_PENDING)
2e44b288
PS		 2191 return false;
2192
66265f13 2193 if (shdr->CreditRequest) {
2e44b288 2194 spin_lock(&server->req_lock);
31473fc4 2195 server->credits += le16_to_cpu(shdr->CreditRequest);
2e44b288
PS		 2196 spin_unlock(&server->req_lock);
2197 wake_up(&server->request_q);
2198 }
2199
2200 return true;
2201}
2202
511c54a2
PS		 2203static bool
2204smb2_is_session_expired(char *buf)
2205{
49f466bd 2206 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
511c54a2 2207
d81243c6
MS		 2208 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2209 shdr->Status != STATUS_USER_SESSION_DELETED)
511c54a2
PS		 2210 return false;
2211
e68a932b
SF		 2212 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2213 le16_to_cpu(shdr->Command),
2214 le64_to_cpu(shdr->MessageId));
d81243c6 2215 cifs_dbg(FYI, "Session expired or deleted\n");
e68a932b 2216
511c54a2
PS		 2217 return true;
2218}
2219
983c88a4
PS		 2220static int
2221smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2222 struct cifsInodeInfo *cinode)
2223{
0822f514
PS		 2224 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2225 return SMB2_lease_break(0, tcon, cinode->lease_key,
2226 smb2_get_lease_state(cinode));
2227
983c88a4
PS		 2228 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2229 fid->volatile_fid,
18cceb6a 2230 CIFS_CACHE_READ(cinode) ? 1 : 0);
983c88a4
PS		 2231}
2232
c5a5f38f 2233void
730928c8
RS		 2234smb2_set_related(struct smb_rqst *rqst)
2235{
2236 struct smb2_sync_hdr *shdr;
2237
2238 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
88a92c91
RS		 2239 if (shdr == NULL) {
2240 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2241 return;
2242 }
730928c8
RS		 2243 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2244}
2245
2246char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2247
c5a5f38f 2248void
e77fe73c 2249smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
730928c8
RS		 2250{
2251 struct smb2_sync_hdr *shdr;
e77fe73c
RS		 2252 struct cifs_ses *ses = tcon->ses;
2253 struct TCP_Server_Info *server = ses->server;
730928c8 2254 unsigned long len = smb_rqst_len(server, rqst);
e77fe73c 2255 int i, num_padding;
730928c8 2256
88a92c91
RS		 2257 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2258 if (shdr == NULL) {
2259 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2260 return;
2261 }
2262
730928c8 2263 /* SMB headers in a compound are 8 byte aligned. */
e77fe73c
RS		 2264
2265 /* No padding needed */
2266 if (!(len & 7))
2267 goto finished;
2268
2269 num_padding = 8 - (len & 7);
2270 if (!smb3_encryption_required(tcon)) {
2271 /*
2272 * If we do not have encryption then we can just add an extra
2273 * iov for the padding.
2274 */
2275 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2276 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2277 rqst->rq_nvec++;
2278 len += num_padding;
2279 } else {
2280 /*
2281 * We can not add a small padding iov for the encryption case
2282 * because the encryption framework can not handle the padding
2283 * iovs.
2284 * We have to flatten this into a single buffer and add
2285 * the padding to it.
2286 */
2287 for (i = 1; i < rqst->rq_nvec; i++) {
2288 memcpy(rqst->rq_iov[0].iov_base +
2289 rqst->rq_iov[0].iov_len,
2290 rqst->rq_iov[i].iov_base,
2291 rqst->rq_iov[i].iov_len);
2292 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
271b9c0c 2293 }
e77fe73c
RS		 2294 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2295 0, num_padding);
2296 rqst->rq_iov[0].iov_len += num_padding;
2297 len += num_padding;
2298 rqst->rq_nvec = 1;
730928c8
RS		 2299 }
2300
e77fe73c 2301 finished:
730928c8
RS		 2302 shdr->NextCommand = cpu_to_le32(len);
2303}
2304
07d3b2e4
RS		 2305/*
2306 * Passes the query info response back to the caller on success.
2307 * Caller need to free this with free_rsp_buf().
2308 */
f9793b6f 2309int
07d3b2e4
RS		 2310smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2311 __le16 *utf16_path, u32 desired_access,
2312 u32 class, u32 type, u32 output_len,
f9793b6f
RS		 2313 struct kvec *rsp, int *buftype,
2314 struct cifs_sb_info *cifs_sb)
6fc05c25 2315{
07d3b2e4 2316 struct cifs_ses *ses = tcon->ses;
07d3b2e4 2317 int flags = 0;
730928c8
RS		 2318 struct smb_rqst rqst[3];
2319 int resp_buftype[3];
2320 struct kvec rsp_iov[3];
4d8dfafc 2321 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
730928c8
RS		 2322 struct kvec qi_iov[1];
2323 struct kvec close_iov[1];
6fc05c25 2324 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
064f6047
PS		 2325 struct cifs_open_parms oparms;
2326 struct cifs_fid fid;
730928c8
RS		 2327 int rc;
2328
2329 if (smb3_encryption_required(tcon))
2330 flags |= CIFS_TRANSFORM_REQ;
2331
2332 memset(rqst, 0, sizeof(rqst));
c5a5f38f 2333 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
730928c8
RS		 2334 memset(rsp_iov, 0, sizeof(rsp_iov));
2335
2336 memset(&open_iov, 0, sizeof(open_iov));
2337 rqst[0].rq_iov = open_iov;
4d8dfafc 2338 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
064f6047
PS		 2339
2340 oparms.tcon = tcon;
07d3b2e4 2341 oparms.desired_access = desired_access;
064f6047 2342 oparms.disposition = FILE_OPEN;
f9793b6f
RS		 2343 if (cifs_sb && backup_cred(cifs_sb))
2344 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2345 else
2346 oparms.create_options = 0;
064f6047 2347 oparms.fid = &fid;
9cbc0b73 2348 oparms.reconnect = false;
6fc05c25 2349
07d3b2e4 2350 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
6fc05c25 2351 if (rc)
07d3b2e4 2352 goto qic_exit;
e77fe73c 2353 smb2_set_next_command(tcon, &rqst[0]);
730928c8
RS		 2354
2355 memset(&qi_iov, 0, sizeof(qi_iov));
2356 rqst[1].rq_iov = qi_iov;
2357 rqst[1].rq_nvec = 1;
2358
2359 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
07d3b2e4
RS		 2360 class, type, 0,
2361 output_len, 0,
f5b05d62 2362 NULL);
730928c8 2363 if (rc)
07d3b2e4 2364 goto qic_exit;
e77fe73c 2365 smb2_set_next_command(tcon, &rqst[1]);
730928c8
RS		 2366 smb2_set_related(&rqst[1]);
2367
2368 memset(&close_iov, 0, sizeof(close_iov));
2369 rqst[2].rq_iov = close_iov;
2370 rqst[2].rq_nvec = 1;
2371
43f8a6a7 2372 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
730928c8 2373 if (rc)
07d3b2e4 2374 goto qic_exit;
730928c8
RS		 2375 smb2_set_related(&rqst[2]);
2376
2377 rc = compound_send_recv(xid, ses, flags, 3, rqst,
2378 resp_buftype, rsp_iov);
f9793b6f
RS		 2379 if (rc) {
2380 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
7dcc82c2
SF		 2381 if (rc == -EREMCHG) {
2382 tcon->need_reconnect = true;
2383 printk_once(KERN_WARNING "server share %s deleted\n",
2384 tcon->treeName);
2385 }
07d3b2e4 2386 goto qic_exit;
f9793b6f 2387 }
07d3b2e4
RS		 2388 *rsp = rsp_iov[1];
2389 *buftype = resp_buftype[1];
2390
2391 qic_exit:
2392 SMB2_open_free(&rqst[0]);
2393 SMB2_query_info_free(&rqst[1]);
2394 SMB2_close_free(&rqst[2]);
2395 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2396 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2397 return rc;
2398}
2399
2400static int
2401smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2402 struct kstatfs *buf)
2403{
2404 struct smb2_query_info_rsp *rsp;
2405 struct smb2_fs_full_size_info *info = NULL;
2406 __le16 utf16_path = 0; /* Null - open root of share */
2407 struct kvec rsp_iov = {NULL, 0};
2408 int buftype = CIFS_NO_BUFFER;
2409 int rc;
2410
2411
2412 rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2413 FILE_READ_ATTRIBUTES,
2414 FS_FULL_SIZE_INFORMATION,
2415 SMB2_O_INFO_FILESYSTEM,
2416 sizeof(struct smb2_fs_full_size_info),
f9793b6f 2417 &rsp_iov, &buftype, NULL);
730928c8
RS		 2418 if (rc)
2419 goto qfs_exit;
2420
07d3b2e4 2421 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
6fc05c25 2422 buf->f_type = SMB2_MAGIC_NUMBER;
730928c8
RS		 2423 info = (struct smb2_fs_full_size_info *)(
2424 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2425 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2426 le32_to_cpu(rsp->OutputBufferLength),
07d3b2e4 2427 &rsp_iov,
730928c8
RS		 2428 sizeof(struct smb2_fs_full_size_info));
2429 if (!rc)
2430 smb2_copy_fs_info_to_kstatfs(info, buf);
2431
2432qfs_exit:
07d3b2e4 2433 free_rsp_buf(buftype, rsp_iov.iov_base);
6fc05c25
PS		 2434 return rc;
2435}
2436
2d304217
SF		 2437static int
2438smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2439 struct kstatfs *buf)
2440{
2441 int rc;
2442 __le16 srch_path = 0; /* Null - open root of share */
2443 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2444 struct cifs_open_parms oparms;
2445 struct cifs_fid fid;
2446
2447 if (!tcon->posix_extensions)
2448 return smb2_queryfs(xid, tcon, buf);
2449
2450 oparms.tcon = tcon;
2451 oparms.desired_access = FILE_READ_ATTRIBUTES;
2452 oparms.disposition = FILE_OPEN;
2453 oparms.create_options = 0;
2454 oparms.fid = &fid;
2455 oparms.reconnect = false;
2456
2457 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2458 if (rc)
2459 return rc;
2460
2461 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2462 fid.volatile_fid, buf);
2463 buf->f_type = SMB2_MAGIC_NUMBER;
2464 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2465 return rc;
2466}
2d304217 2467
027e8eec
PS		 2468static bool
2469smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2470{
2471 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2472 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2473}
2474
f7ba7fe6
PS		 2475static int
2476smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2477 __u64 length, __u32 type, int lock, int unlock, bool wait)
2478{
2479 if (unlock && !lock)
2480 type = SMB2_LOCKFLAG_UNLOCK;
2481 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2482 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2483 current->tgid, length, offset, type, wait);
2484}
2485
b8c32dbb
PS		 2486static void
2487smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2488{
2489 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2490}
2491
2492static void
2493smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2494{
2495 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2496}
2497
2498static void
2499smb2_new_lease_key(struct cifs_fid *fid)
2500{
fa70b87c 2501 generate_random_uuid(fid->lease_key);
b8c32dbb
PS		 2502}
2503
9d49640a
AA		 2504static int
2505smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2506 const char *search_name,
2507 struct dfs_info3_param **target_nodes,
2508 unsigned int *num_of_nodes,
2509 const struct nls_table *nls_codepage, int remap)
2510{
2511 int rc;
2512 __le16 *utf16_path = NULL;
2513 int utf16_path_len = 0;
2514 struct cifs_tcon *tcon;
2515 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2516 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2517 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2518
a205d500 2519 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
9d49640a
AA		 2520
2521 /*
63a83b86 2522 * Try to use the IPC tcon, otherwise just use any
9d49640a 2523 */
63a83b86
AA		 2524 tcon = ses->tcon_ipc;
2525 if (tcon == NULL) {
2526 spin_lock(&cifs_tcp_ses_lock);
2527 tcon = list_first_entry_or_null(&ses->tcon_list,
2528 struct cifs_tcon,
2529 tcon_list);
2530 if (tcon)
2531 tcon->tc_count++;
2532 spin_unlock(&cifs_tcp_ses_lock);
2533 }
2534
2535 if (tcon == NULL) {
9d49640a
AA		 2536 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2537 ses);
2538 rc = -ENOTCONN;
2539 goto out;
2540 }
2541
2542 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2543 &utf16_path_len,
2544 nls_codepage, remap);
2545 if (!utf16_path) {
2546 rc = -ENOMEM;
2547 goto out;
2548 }
2549
2550 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2551 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2552 if (!dfs_req) {
2553 rc = -ENOMEM;
2554 goto out;
2555 }
2556
2557 /* Highest DFS referral version understood */
2558 dfs_req->MaxReferralLevel = DFS_VERSION;
2559
2560 /* Path to resolve in an UTF-16 null-terminated string */
2561 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2562
2563 do {
9d49640a
AA		 2564 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2565 FSCTL_DFS_GET_REFERRALS,
63a83b86 2566 true /* is_fsctl */,
153322f7 2567 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
9d49640a 2568 (char **)&dfs_rsp, &dfs_rsp_size);
9d49640a
AA		 2569 } while (rc == -EAGAIN);
2570
2571 if (rc) {
2564f2ff 2572 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
3175eb9b 2573 cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
9d49640a
AA		 2574 goto out;
2575 }
2576
2577 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2578 num_of_nodes, target_nodes,
2579 nls_codepage, remap, search_name,
2580 true /* is_unicode */);
2581 if (rc) {
3175eb9b 2582 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
9d49640a
AA		 2583 goto out;
2584 }
2585
2586 out:
63a83b86
AA		 2587 if (tcon && !tcon->ipc) {
2588 /* ipc tcons are not refcounted */
9d49640a
AA		 2589 spin_lock(&cifs_tcp_ses_lock);
2590 tcon->tc_count--;
2591 spin_unlock(&cifs_tcp_ses_lock);
2592 }
2593 kfree(utf16_path);
2594 kfree(dfs_req);
2595 kfree(dfs_rsp);
2596 return rc;
2597}
5de254dc 2598
d5ecebc4
SF		 2599static int
2600parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2601 u32 plen, char **target_path,
2602 struct cifs_sb_info *cifs_sb)
2603{
2604 unsigned int len;
2605
2606 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2607 len = le16_to_cpu(symlink_buf->ReparseDataLength);
2608
d5ecebc4
SF		 2609 if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2610 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2611 le64_to_cpu(symlink_buf->InodeType));
2612 return -EOPNOTSUPP;
2613 }
2614
2615 *target_path = cifs_strndup_from_utf16(
2616 symlink_buf->PathBuffer,
2617 len, true, cifs_sb->local_nls);
2618 if (!(*target_path))
2619 return -ENOMEM;
2620
2621 convert_delimiter(*target_path, '/');
2622 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2623
2624 return 0;
2625}
2626
5de254dc
RS		 2627static int
2628parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2629 u32 plen, char **target_path,
2630 struct cifs_sb_info *cifs_sb)
2631{
2632 unsigned int sub_len;
2633 unsigned int sub_offset;
2634
d5ecebc4 2635 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
5de254dc
RS		 2636
2637 sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2638 sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2639 if (sub_offset + 20 > plen ||
2640 sub_offset + sub_len + 20 > plen) {
2641 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2642 return -EIO;
2643 }
2644
2645 *target_path = cifs_strndup_from_utf16(
2646 symlink_buf->PathBuffer + sub_offset,
2647 sub_len, true, cifs_sb->local_nls);
2648 if (!(*target_path))
2649 return -ENOMEM;
2650
2651 convert_delimiter(*target_path, '/');
2652 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2653
2654 return 0;
2655}
2656
d5ecebc4 2657static int
f5f111c2
RS		 2658parse_reparse_point(struct reparse_data_buffer *buf,
2659 u32 plen, char **target_path,
2660 struct cifs_sb_info *cifs_sb)
d5ecebc4 2661{
f5f111c2
RS		 2662 if (plen < sizeof(struct reparse_data_buffer)) {
2663 cifs_dbg(VFS, "reparse buffer is too small. Must be "
2664 "at least 8 bytes but was %d\n", plen);
2665 return -EIO;
2666 }
d5ecebc4 2667
f5f111c2
RS		 2668 if (plen < le16_to_cpu(buf->ReparseDataLength) +
2669 sizeof(struct reparse_data_buffer)) {
2670 cifs_dbg(VFS, "srv returned invalid reparse buf "
2671 "length: %d\n", plen);
2672 return -EIO;
2673 }
d5ecebc4 2674
f5f111c2
RS		 2675 /* See MS-FSCC 2.1.2 */
2676 switch (le32_to_cpu(buf->ReparseTag)) {
2677 case IO_REPARSE_TAG_NFS:
2678 return parse_reparse_posix(
2679 (struct reparse_posix_data *)buf,
2680 plen, target_path, cifs_sb);
2681 case IO_REPARSE_TAG_SYMLINK:
2682 return parse_reparse_symlink(
2683 (struct reparse_symlink_data_buffer *)buf,
2684 plen, target_path, cifs_sb);
2685 default:
2686 cifs_dbg(VFS, "srv returned unknown symlink buffer "
2687 "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2688 return -EOPNOTSUPP;
2689 }
d5ecebc4
SF		 2690}
2691
7893242e
PS		 2692#define SMB2_SYMLINK_STRUCT_SIZE \
2693 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2694
b42bf888
PS		 2695static int
2696smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
ebaf546a
RS		 2697 struct cifs_sb_info *cifs_sb, const char *full_path,
2698 char **target_path, bool is_reparse_point)
b42bf888
PS		 2699{
2700 int rc;
ebaf546a 2701 __le16 *utf16_path = NULL;
b42bf888
PS		 2702 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2703 struct cifs_open_parms oparms;
2704 struct cifs_fid fid;
91cb74f5 2705 struct kvec err_iov = {NULL, 0};
9d874c36 2706 struct smb2_err_rsp *err_buf = NULL;
b42bf888 2707 struct smb2_symlink_err_rsp *symlink;
7893242e
PS		 2708 unsigned int sub_len;
2709 unsigned int sub_offset;
2710 unsigned int print_len;
2711 unsigned int print_offset;
ebaf546a
RS		 2712 int flags = 0;
2713 struct smb_rqst rqst[3];
2714 int resp_buftype[3];
2715 struct kvec rsp_iov[3];
2716 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2717 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2718 struct kvec close_iov[1];
2719 struct smb2_create_rsp *create_rsp;
2720 struct smb2_ioctl_rsp *ioctl_rsp;
5de254dc 2721 struct reparse_data_buffer *reparse_buf;
ebaf546a 2722 u32 plen;
b42bf888
PS		 2723
2724 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2725
5de254dc
RS		 2726 *target_path = NULL;
2727
ebaf546a
RS		 2728 if (smb3_encryption_required(tcon))
2729 flags |= CIFS_TRANSFORM_REQ;
2730
2731 memset(rqst, 0, sizeof(rqst));
2732 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2733 memset(rsp_iov, 0, sizeof(rsp_iov));
2734
b42bf888
PS		 2735 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2736 if (!utf16_path)
2737 return -ENOMEM;
2738
ebaf546a
RS		 2739 /* Open */
2740 memset(&open_iov, 0, sizeof(open_iov));
2741 rqst[0].rq_iov = open_iov;
2742 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2743
2744 memset(&oparms, 0, sizeof(oparms));
b42bf888
PS		 2745 oparms.tcon = tcon;
2746 oparms.desired_access = FILE_READ_ATTRIBUTES;
2747 oparms.disposition = FILE_OPEN;
ebaf546a 2748
5e19697b
SF		 2749 if (backup_cred(cifs_sb))
2750 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2751 else
2752 oparms.create_options = 0;
ebaf546a
RS		 2753 if (is_reparse_point)
2754 oparms.create_options = OPEN_REPARSE_POINT;
2755
b42bf888
PS		 2756 oparms.fid = &fid;
2757 oparms.reconnect = false;
2758
ebaf546a
RS		 2759 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2760 if (rc)
2761 goto querty_exit;
2762 smb2_set_next_command(tcon, &rqst[0]);
2763
2764
2765 /* IOCTL */
2766 memset(&io_iov, 0, sizeof(io_iov));
2767 rqst[1].rq_iov = io_iov;
2768 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2769
2770 rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
2771 fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2772 true /* is_fctl */, NULL, 0, CIFSMaxBufSize);
2773 if (rc)
2774 goto querty_exit;
2775
2776 smb2_set_next_command(tcon, &rqst[1]);
2777 smb2_set_related(&rqst[1]);
2778
2779
2780 /* Close */
2781 memset(&close_iov, 0, sizeof(close_iov));
2782 rqst[2].rq_iov = close_iov;
2783 rqst[2].rq_nvec = 1;
2784
43f8a6a7 2785 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
ebaf546a
RS		 2786 if (rc)
2787 goto querty_exit;
2788
2789 smb2_set_related(&rqst[2]);
2790
2791 rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
2792 resp_buftype, rsp_iov);
2793
2794 create_rsp = rsp_iov[0].iov_base;
2795 if (create_rsp && create_rsp->sync_hdr.Status)
2796 err_iov = rsp_iov[0];
2797 ioctl_rsp = rsp_iov[1].iov_base;
2798
2799 /*
2800 * Open was successful and we got an ioctl response.
2801 */
2802 if ((rc == 0) && (is_reparse_point)) {
2803 /* See MS-FSCC 2.3.23 */
2804
5de254dc
RS		 2805 reparse_buf = (struct reparse_data_buffer *)
2806 ((char *)ioctl_rsp +
2807 le32_to_cpu(ioctl_rsp->OutputOffset));
ebaf546a
RS		 2808 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2809
2810 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2811 rsp_iov[1].iov_len) {
3175eb9b 2812 cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
5de254dc
RS		 2813 plen);
2814 rc = -EIO;
2815 goto querty_exit;
2816 }
2817
f5f111c2
RS		 2818 rc = parse_reparse_point(reparse_buf, plen, target_path,
2819 cifs_sb);
ebaf546a
RS		 2820 goto querty_exit;
2821 }
2822
0d568cd3 2823 if (!rc || !err_iov.iov_base) {
9d874c36 2824 rc = -ENOENT;
ebaf546a 2825 goto querty_exit;
b42bf888 2826 }
7893242e 2827
91cb74f5 2828 err_buf = err_iov.iov_base;
7893242e 2829 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1fc6ad2f 2830 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
df070afd
RS		 2831 rc = -EINVAL;
2832 goto querty_exit;
2833 }
2834
2835 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2836 if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2837 le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2838 rc = -EINVAL;
9d874c36 2839 goto querty_exit;
7893242e
PS		 2840 }
2841
b42bf888
PS		 2842 /* open must fail on symlink - reset rc */
2843 rc = 0;
b42bf888
PS		 2844 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2845 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
7893242e
PS		 2846 print_len = le16_to_cpu(symlink->PrintNameLength);
2847 print_offset = le16_to_cpu(symlink->PrintNameOffset);
2848
1fc6ad2f 2849 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
df070afd 2850 rc = -EINVAL;
9d874c36 2851 goto querty_exit;
7893242e
PS		 2852 }
2853
1fc6ad2f
RS		 2854 if (err_iov.iov_len <
2855 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
df070afd 2856 rc = -EINVAL;
9d874c36 2857 goto querty_exit;
7893242e
PS		 2858 }
2859
b42bf888
PS		 2860 *target_path = cifs_strndup_from_utf16(
2861 (char *)symlink->PathBuffer + sub_offset,
2862 sub_len, true, cifs_sb->local_nls);
2863 if (!(*target_path)) {
9d874c36
RS		 2864 rc = -ENOMEM;
2865 goto querty_exit;
b42bf888
PS		 2866 }
2867 convert_delimiter(*target_path, '/');
2868 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
9d874c36
RS		 2869
2870 querty_exit:
ebaf546a 2871 cifs_dbg(FYI, "query symlink rc %d\n", rc);
b42bf888 2872 kfree(utf16_path);
ebaf546a
RS		 2873 SMB2_open_free(&rqst[0]);
2874 SMB2_ioctl_free(&rqst[1]);
2875 SMB2_close_free(&rqst[2]);
2876 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2877 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2878 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
b42bf888
PS		 2879 return rc;
2880}
2881
2f1afe25
SP		 2882static struct cifs_ntsd *
2883get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2884 const struct cifs_fid *cifsfid, u32 *pacllen)
2885{
2886 struct cifs_ntsd *pntsd = NULL;
2887 unsigned int xid;
2888 int rc = -EOPNOTSUPP;
2889 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2890
2891 if (IS_ERR(tlink))
2892 return ERR_CAST(tlink);
2893
2894 xid = get_xid();
2895 cifs_dbg(FYI, "trying to get acl\n");
2896
2897 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2898 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2899 free_xid(xid);
2900
2901 cifs_put_tlink(tlink);
2902
2903 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2904 if (rc)
2905 return ERR_PTR(rc);
2906 return pntsd;
2907
2908}
2909
2910static struct cifs_ntsd *
2911get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2912 const char *path, u32 *pacllen)
2913{
2914 struct cifs_ntsd *pntsd = NULL;
2915 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2916 unsigned int xid;
2917 int rc;
2918 struct cifs_tcon *tcon;
2919 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2920 struct cifs_fid fid;
2921 struct cifs_open_parms oparms;
2922 __le16 *utf16_path;
2923
2924 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2925 if (IS_ERR(tlink))
2926 return ERR_CAST(tlink);
2927
2928 tcon = tlink_tcon(tlink);
2929 xid = get_xid();
2930
2931 if (backup_cred(cifs_sb))
709340a0 2932 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2f1afe25
SP		 2933 else
2934 oparms.create_options = 0;
2935
2936 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 2937 if (!utf16_path) {
2938 rc = -ENOMEM;
2939 free_xid(xid);
2940 return ERR_PTR(rc);
2941 }
2f1afe25
SP		 2942
2943 oparms.tcon = tcon;
2944 oparms.desired_access = READ_CONTROL;
2945 oparms.disposition = FILE_OPEN;
2946 oparms.fid = &fid;
2947 oparms.reconnect = false;
2948
9d874c36 2949 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2f1afe25
SP		 2950 kfree(utf16_path);
2951 if (!rc) {
2952 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2953 fid.volatile_fid, (void **)&pntsd, pacllen);
2954 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2955 }
2956
2957 cifs_put_tlink(tlink);
2958 free_xid(xid);
2959
2960 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2961 if (rc)
2962 return ERR_PTR(rc);
2963 return pntsd;
2964}
2965
366ed846
SP		 2966static int
2967set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2968 struct inode *inode, const char *path, int aclflag)
2969{
2970 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2971 unsigned int xid;
2972 int rc, access_flags = 0;
2973 struct cifs_tcon *tcon;
2974 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2975 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2976 struct cifs_fid fid;
2977 struct cifs_open_parms oparms;
2978 __le16 *utf16_path;
2979
2980 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2981 if (IS_ERR(tlink))
2982 return PTR_ERR(tlink);
2983
2984 tcon = tlink_tcon(tlink);
2985 xid = get_xid();
2986
2987 if (backup_cred(cifs_sb))
2988 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2989 else
2990 oparms.create_options = 0;
2991
2992 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2993 access_flags = WRITE_OWNER;
2994 else
2995 access_flags = WRITE_DAC;
2996
2997 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
cfe89091
SF		 2998 if (!utf16_path) {
2999 rc = -ENOMEM;
3000 free_xid(xid);
3001 return rc;
3002 }
366ed846
SP		 3003
3004 oparms.tcon = tcon;
3005 oparms.desired_access = access_flags;
3006 oparms.disposition = FILE_OPEN;
3007 oparms.path = path;
3008 oparms.fid = &fid;
3009 oparms.reconnect = false;
3010
9d874c36 3011 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
366ed846
SP		 3012 kfree(utf16_path);
3013 if (!rc) {
3014 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3015 fid.volatile_fid, pnntsd, acllen, aclflag);
3016 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3017 }
3018
3019 cifs_put_tlink(tlink);
3020 free_xid(xid);
3021 return rc;
3022}
366ed846 3023
2f1afe25
SP		 3024/* Retrieve an ACL from the server */
3025static struct cifs_ntsd *
3026get_smb2_acl(struct cifs_sb_info *cifs_sb,
3027 struct inode *inode, const char *path,
3028 u32 *pacllen)
3029{
3030 struct cifs_ntsd *pntsd = NULL;
3031 struct cifsFileInfo *open_file = NULL;
3032
3033 if (inode)
3034 open_file = find_readable_file(CIFS_I(inode), true);
3035 if (!open_file)
3036 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3037
3038 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3039 cifsFileInfo_put(open_file);
3040 return pntsd;
3041}
2f1afe25 3042
30175628
SF		 3043static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3044 loff_t offset, loff_t len, bool keep_size)
3045{
72c419d9 3046 struct cifs_ses *ses = tcon->ses;
30175628
SF		 3047 struct inode *inode;
3048 struct cifsInodeInfo *cifsi;
3049 struct cifsFileInfo *cfile = file->private_data;
3050 struct file_zero_data_information fsctl_buf;
3051 long rc;
3052 unsigned int xid;
72c419d9 3053 __le64 eof;
30175628
SF		 3054
3055 xid = get_xid();
3056
2b0143b5 3057 inode = d_inode(cfile->dentry);
30175628
SF		 3058 cifsi = CIFS_I(inode);
3059
a205d500 3060 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
779ede04
SF		 3061 ses->Suid, offset, len);
3062
3063
30175628
SF		 3064 /* if file not oplocked can't be sure whether asking to extend size */
3065 if (!CIFS_CACHE_READ(cifsi))
cfe89091
SF		 3066 if (keep_size == false) {
3067 rc = -EOPNOTSUPP;
779ede04
SF		 3068 trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3069 tcon->tid, ses->Suid, offset, len, rc);
cfe89091
SF		 3070 free_xid(xid);
3071 return rc;
3072 }
30175628 3073
d1c35afb 3074 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
30175628
SF		 3075
3076 fsctl_buf.FileOffset = cpu_to_le64(offset);
3077 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3078
c425014a
RS		 3079 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3080 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3081 (char *)&fsctl_buf,
3082 sizeof(struct file_zero_data_information),
3083 0, NULL, NULL);
72c419d9
RS		 3084 if (rc)
3085 goto zero_range_exit;
3086
3087 /*
3088 * do we also need to change the size of the file?
3089 */
3090 if (keep_size == false && i_size_read(inode) < offset + len) {
72c419d9 3091 eof = cpu_to_le64(offset + len);
c425014a
RS		 3092 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3093 cfile->fid.volatile_fid, cfile->pid, &eof);
72c419d9
RS		 3094 }
3095
72c419d9 3096 zero_range_exit:
30175628 3097 free_xid(xid);
779ede04
SF		 3098 if (rc)
3099 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3100 ses->Suid, offset, len, rc);
3101 else
3102 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3103 ses->Suid, offset, len);
30175628
SF		 3104 return rc;
3105}
3106
31742c5a
SF		 3107static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3108 loff_t offset, loff_t len)
3109{
3110 struct inode *inode;
31742c5a
SF		 3111 struct cifsFileInfo *cfile = file->private_data;
3112 struct file_zero_data_information fsctl_buf;
3113 long rc;
3114 unsigned int xid;
3115 __u8 set_sparse = 1;
3116
3117 xid = get_xid();
3118
2b0143b5 3119 inode = d_inode(cfile->dentry);
31742c5a
SF		 3120
3121 /* Need to make file sparse, if not already, before freeing range. */
3122 /* Consider adding equivalent for compressed since it could also work */
cfe89091
SF		 3123 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3124 rc = -EOPNOTSUPP;
3125 free_xid(xid);
3126 return rc;
3127 }
31742c5a 3128
a205d500 3129 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
31742c5a
SF		 3130
3131 fsctl_buf.FileOffset = cpu_to_le64(offset);
3132 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3133
3134 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3135 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
63a83b86 3136 true /* is_fctl */, (char *)&fsctl_buf,
153322f7
SF		 3137 sizeof(struct file_zero_data_information),
3138 CIFSMaxBufSize, NULL, NULL);
31742c5a
SF		 3139 free_xid(xid);
3140 return rc;
3141}
3142
9ccf3216
SF		 3143static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3144 loff_t off, loff_t len, bool keep_size)
3145{
3146 struct inode *inode;
3147 struct cifsInodeInfo *cifsi;
3148 struct cifsFileInfo *cfile = file->private_data;
3149 long rc = -EOPNOTSUPP;
3150 unsigned int xid;
f1699479 3151 __le64 eof;
9ccf3216
SF		 3152
3153 xid = get_xid();
3154
2b0143b5 3155 inode = d_inode(cfile->dentry);
9ccf3216
SF		 3156 cifsi = CIFS_I(inode);
3157
779ede04
SF		 3158 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3159 tcon->ses->Suid, off, len);
9ccf3216
SF		 3160 /* if file not oplocked can't be sure whether asking to extend size */
3161 if (!CIFS_CACHE_READ(cifsi))
cfe89091 3162 if (keep_size == false) {
779ede04
SF		 3163 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3164 tcon->tid, tcon->ses->Suid, off, len, rc);
cfe89091
SF		 3165 free_xid(xid);
3166 return rc;
3167 }
9ccf3216
SF		 3168
3169 /*
3170 * Files are non-sparse by default so falloc may be a no-op
3171 * Must check if file sparse. If not sparse, and not extending
3172 * then no need to do anything since file already allocated
3173 */
3174 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3175 if (keep_size == true)
cfe89091 3176 rc = 0;
9ccf3216
SF		 3177 /* check if extending file */
3178 else if (i_size_read(inode) >= off + len)
3179 /* not extending file and already not sparse */
cfe89091 3180 rc = 0;
9ccf3216
SF		 3181 /* BB: in future add else clause to extend file */
3182 else
cfe89091 3183 rc = -EOPNOTSUPP;
779ede04
SF		 3184 if (rc)
3185 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3186 tcon->tid, tcon->ses->Suid, off, len, rc);
3187 else
3188 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid,
3189 tcon->tid, tcon->ses->Suid, off, len);
cfe89091
SF		 3190 free_xid(xid);
3191 return rc;
9ccf3216
SF		 3192 }
3193
3194 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3195 /*
3196 * Check if falloc starts within first few pages of file
3197 * and ends within a few pages of the end of file to
3198 * ensure that most of file is being forced to be
3199 * fallocated now. If so then setting whole file sparse
3200 * ie potentially making a few extra pages at the beginning
3201 * or end of the file non-sparse via set_sparse is harmless.
3202 */
cfe89091
SF		 3203 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3204 rc = -EOPNOTSUPP;
779ede04
SF		 3205 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3206 tcon->tid, tcon->ses->Suid, off, len, rc);
cfe89091
SF		 3207 free_xid(xid);
3208 return rc;
3209 }
9ccf3216 3210
f1699479
RS		 3211 smb2_set_sparse(xid, tcon, cfile, inode, false);
3212 rc = 0;
3213 } else {
3214 smb2_set_sparse(xid, tcon, cfile, inode, false);
3215 rc = 0;
3216 if (i_size_read(inode) < off + len) {
3217 eof = cpu_to_le64(off + len);
3218 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3219 cfile->fid.volatile_fid, cfile->pid,
3220 &eof);
3221 }
9ccf3216 3222 }
9ccf3216 3223
779ede04
SF		 3224 if (rc)
3225 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3226 tcon->ses->Suid, off, len, rc);
3227 else
3228 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3229 tcon->ses->Suid, off, len);
9ccf3216
SF		 3230
3231 free_xid(xid);
3232 return rc;
3233}
3234
dece44e3
RS		 3235static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3236{
3237 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3238 struct cifsInodeInfo *cifsi;
3239 struct inode *inode;
3240 int rc = 0;
3241 struct file_allocated_range_buffer in_data, *out_data = NULL;
3242 u32 out_data_len;
3243 unsigned int xid;
3244
3245 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3246 return generic_file_llseek(file, offset, whence);
3247
3248 inode = d_inode(cfile->dentry);
3249 cifsi = CIFS_I(inode);
3250
3251 if (offset < 0 || offset >= i_size_read(inode))
3252 return -ENXIO;
3253
3254 xid = get_xid();
3255 /*
3256 * We need to be sure that all dirty pages are written as they
3257 * might fill holes on the server.
3258 * Note that we also MUST flush any written pages since at least
3259 * some servers (Windows2016) will not reflect recent writes in
3260 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3261 */
3262 wrcfile = find_writable_file(cifsi, false);
3263 if (wrcfile) {
3264 filemap_write_and_wait(inode->i_mapping);
3265 smb2_flush_file(xid, tcon, &wrcfile->fid);
3266 cifsFileInfo_put(wrcfile);
3267 }
3268
3269 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3270 if (whence == SEEK_HOLE)
3271 offset = i_size_read(inode);
3272 goto lseek_exit;
3273 }
3274
3275 in_data.file_offset = cpu_to_le64(offset);
3276 in_data.length = cpu_to_le64(i_size_read(inode));
3277
3278 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3279 cfile->fid.volatile_fid,
3280 FSCTL_QUERY_ALLOCATED_RANGES, true,
3281 (char *)&in_data, sizeof(in_data),
3282 sizeof(struct file_allocated_range_buffer),
3283 (char **)&out_data, &out_data_len);
3284 if (rc == -E2BIG)
3285 rc = 0;
3286 if (rc)
3287 goto lseek_exit;
3288
3289 if (whence == SEEK_HOLE && out_data_len == 0)
3290 goto lseek_exit;
3291
3292 if (whence == SEEK_DATA && out_data_len == 0) {
3293 rc = -ENXIO;
3294 goto lseek_exit;
3295 }
3296
3297 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3298 rc = -EINVAL;
3299 goto lseek_exit;
3300 }
3301 if (whence == SEEK_DATA) {
3302 offset = le64_to_cpu(out_data->file_offset);
3303 goto lseek_exit;
3304 }
3305 if (offset < le64_to_cpu(out_data->file_offset))
3306 goto lseek_exit;
3307
3308 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3309
3310 lseek_exit:
3311 free_xid(xid);
3312 kfree(out_data);
3313 if (!rc)
3314 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3315 else
3316 return rc;
3317}
3318
2f3ebaba
RS		 3319static int smb3_fiemap(struct cifs_tcon *tcon,
3320 struct cifsFileInfo *cfile,
3321 struct fiemap_extent_info *fei, u64 start, u64 len)
3322{
3323 unsigned int xid;
3324 struct file_allocated_range_buffer in_data, *out_data;
3325 u32 out_data_len;
3326 int i, num, rc, flags, last_blob;
3327 u64 next;
3328
3329 if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3330 return -EBADR;
3331
3332 xid = get_xid();
3333 again:
3334 in_data.file_offset = cpu_to_le64(start);
3335 in_data.length = cpu_to_le64(len);
3336
3337 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3338 cfile->fid.volatile_fid,
3339 FSCTL_QUERY_ALLOCATED_RANGES, true,
3340 (char *)&in_data, sizeof(in_data),
3341 1024 * sizeof(struct file_allocated_range_buffer),
3342 (char **)&out_data, &out_data_len);
3343 if (rc == -E2BIG) {
3344 last_blob = 0;
3345 rc = 0;
3346 } else
3347 last_blob = 1;
3348 if (rc)
3349 goto out;
3350
3351 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3352 rc = -EINVAL;
3353 goto out;
3354 }
3355 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3356 rc = -EINVAL;
3357 goto out;
3358 }
3359
3360 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3361 for (i = 0; i < num; i++) {
3362 flags = 0;
3363 if (i == num - 1 && last_blob)
3364 flags |= FIEMAP_EXTENT_LAST;
3365
3366 rc = fiemap_fill_next_extent(fei,
3367 le64_to_cpu(out_data[i].file_offset),
3368 le64_to_cpu(out_data[i].file_offset),
3369 le64_to_cpu(out_data[i].length),
3370 flags);
3371 if (rc < 0)
3372 goto out;
3373 if (rc == 1) {
3374 rc = 0;
3375 goto out;
3376 }
3377 }
3378
3379 if (!last_blob) {
3380 next = le64_to_cpu(out_data[num - 1].file_offset) +
3381 le64_to_cpu(out_data[num - 1].length);
3382 len = len - (next - start);
3383 start = next;
3384 goto again;
3385 }
3386
3387 out:
3388 free_xid(xid);
3389 kfree(out_data);
3390 return rc;
3391}
9ccf3216 3392
31742c5a
SF		 3393static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3394 loff_t off, loff_t len)
3395{
3396 /* KEEP_SIZE already checked for by do_fallocate */
3397 if (mode & FALLOC_FL_PUNCH_HOLE)
3398 return smb3_punch_hole(file, tcon, off, len);
30175628
SF		 3399 else if (mode & FALLOC_FL_ZERO_RANGE) {
3400 if (mode & FALLOC_FL_KEEP_SIZE)
3401 return smb3_zero_range(file, tcon, off, len, true);
3402 return smb3_zero_range(file, tcon, off, len, false);
9ccf3216
SF		 3403 } else if (mode == FALLOC_FL_KEEP_SIZE)
3404 return smb3_simple_falloc(file, tcon, off, len, true);
3405 else if (mode == 0)
3406 return smb3_simple_falloc(file, tcon, off, len, false);
31742c5a
SF		 3407
3408 return -EOPNOTSUPP;
3409}
3410
c11f1df5
SP		 3411static void
3412smb2_downgrade_oplock(struct TCP_Server_Info *server,
9bd45408
PS		 3413 struct cifsInodeInfo *cinode, __u32 oplock,
3414 unsigned int epoch, bool *purge_cache)
c11f1df5 3415{
9bd45408 3416 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
c11f1df5
SP		 3417}
3418
7b9b9edb 3419static void
9bd45408
PS		 3420smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3421 unsigned int epoch, bool *purge_cache);
3422
3423static void
3424smb3_downgrade_oplock(struct TCP_Server_Info *server,
3425 struct cifsInodeInfo *cinode, __u32 oplock,
3426 unsigned int epoch, bool *purge_cache)
7b9b9edb 3427{
9bd45408
PS		 3428 unsigned int old_state = cinode->oplock;
3429 unsigned int old_epoch = cinode->epoch;
3430 unsigned int new_state;
3431
3432 if (epoch > old_epoch) {
3433 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3434 cinode->epoch = epoch;
3435 }
3436
3437 new_state = cinode->oplock;
3438 *purge_cache = false;
3439
3440 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3441 (new_state & CIFS_CACHE_READ_FLG) == 0)
3442 *purge_cache = true;
3443 else if (old_state == new_state && (epoch - old_epoch > 1))
3444 *purge_cache = true;
7b9b9edb
PS		 3445}
3446
53ef1016 3447static void
42873b0a
PS		 3448smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3449 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 3450{
3451 oplock &= 0xFF;
3452 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3453 return;
3454 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
42873b0a 3455 cinode->oplock = CIFS_CACHE_RHW_FLG;
53ef1016
PS		 3456 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3457 &cinode->vfs_inode);
3458 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
42873b0a 3459 cinode->oplock = CIFS_CACHE_RW_FLG;
53ef1016
PS		 3460 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3461 &cinode->vfs_inode);
3462 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3463 cinode->oplock = CIFS_CACHE_READ_FLG;
3464 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3465 &cinode->vfs_inode);
3466 } else
3467 cinode->oplock = 0;
3468}
3469
3470static void
42873b0a
PS		 3471smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3472 unsigned int epoch, bool *purge_cache)
53ef1016
PS		 3473{
3474 char message[5] = {0};
6a54b2e0 3475 unsigned int new_oplock = 0;
53ef1016
PS		 3476
3477 oplock &= 0xFF;
3478 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3479 return;
3480
a016e279
PS		 3481 /* Check if the server granted an oplock rather than a lease */
3482 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3483 return smb2_set_oplock_level(cinode, oplock, epoch,
3484 purge_cache);
3485
53ef1016 3486 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
6a54b2e0 3487 new_oplock |= CIFS_CACHE_READ_FLG;
53ef1016
PS		 3488 strcat(message, "R");
3489 }
3490 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
6a54b2e0 3491 new_oplock |= CIFS_CACHE_HANDLE_FLG;
53ef1016
PS		 3492 strcat(message, "H");
3493 }
3494 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
6a54b2e0 3495 new_oplock |= CIFS_CACHE_WRITE_FLG;
53ef1016
PS		 3496 strcat(message, "W");
3497 }
6a54b2e0
CP		 3498 if (!new_oplock)
3499 strncpy(message, "None", sizeof(message));
3500
3501 cinode->oplock = new_oplock;
53ef1016
PS		 3502 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3503 &cinode->vfs_inode);
3504}
3505
42873b0a
PS		 3506static void
3507smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3508 unsigned int epoch, bool *purge_cache)
3509{
3510 unsigned int old_oplock = cinode->oplock;
3511
3512 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3513
3514 if (purge_cache) {
3515 *purge_cache = false;
3516 if (old_oplock == CIFS_CACHE_READ_FLG) {
3517 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3518 (epoch - cinode->epoch > 0))
3519 *purge_cache = true;
3520 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3521 (epoch - cinode->epoch > 1))
3522 *purge_cache = true;
3523 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3524 (epoch - cinode->epoch > 1))
3525 *purge_cache = true;
3526 else if (cinode->oplock == 0 &&
3527 (epoch - cinode->epoch > 0))
3528 *purge_cache = true;
3529 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3530 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3531 (epoch - cinode->epoch > 0))
3532 *purge_cache = true;
3533 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3534 (epoch - cinode->epoch > 1))
3535 *purge_cache = true;
3536 }
3537 cinode->epoch = epoch;
3538 }
3539}
3540
53ef1016
PS		 3541static bool
3542smb2_is_read_op(__u32 oplock)
3543{
3544 return oplock == SMB2_OPLOCK_LEVEL_II;
3545}
3546
3547static bool
3548smb21_is_read_op(__u32 oplock)
3549{
3550 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3551 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3552}
3553
f047390a
PS		 3554static __le32
3555map_oplock_to_lease(u8 oplock)
3556{
3557 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3558 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3559 else if (oplock == SMB2_OPLOCK_LEVEL_II)
3560 return SMB2_LEASE_READ_CACHING;
3561 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3562 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3563 SMB2_LEASE_WRITE_CACHING;
3564 return 0;
3565}
3566
a41a28bd
PS		 3567static char *
3568smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3569{
3570 struct create_lease *buf;
3571
3572 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3573 if (!buf)
3574 return NULL;
3575
729c0c9d 3576 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a 3577 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
a41a28bd
PS		 3578
3579 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3580 (struct create_lease, lcontext));
3581 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3582 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3583 (struct create_lease, Name));
3584 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 3585 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
a41a28bd
PS		 3586 buf->Name[0] = 'R';
3587 buf->Name[1] = 'q';
3588 buf->Name[2] = 'L';
3589 buf->Name[3] = 's';
3590 return (char *)buf;
3591}
3592
f047390a
PS		 3593static char *
3594smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3595{
3596 struct create_lease_v2 *buf;
3597
3598 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3599 if (!buf)
3600 return NULL;
3601
729c0c9d 3602 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 3603 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3604
3605 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3606 (struct create_lease_v2, lcontext));
3607 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3608 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3609 (struct create_lease_v2, Name));
3610 buf->ccontext.NameLength = cpu_to_le16(4);
12197a7f 3611 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
f047390a
PS		 3612 buf->Name[0] = 'R';
3613 buf->Name[1] = 'q';
3614 buf->Name[2] = 'L';
3615 buf->Name[3] = 's';
3616 return (char *)buf;
3617}
3618
b5c7cde3 3619static __u8
96164ab2 3620smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
b5c7cde3
PS		 3621{
3622 struct create_lease *lc = (struct create_lease *)buf;
3623
42873b0a 3624 *epoch = 0; /* not used */
b5c7cde3
PS		 3625 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3626 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3627 return le32_to_cpu(lc->lcontext.LeaseState);
3628}
3629
f047390a 3630static __u8
96164ab2 3631smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
f047390a
PS		 3632{
3633 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3634
42873b0a 3635 *epoch = le16_to_cpu(lc->lcontext.Epoch);
f047390a
PS		 3636 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3637 return SMB2_OPLOCK_LEVEL_NOCHANGE;
96164ab2 3638 if (lease_key)
729c0c9d 3639 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
f047390a
PS		 3640 return le32_to_cpu(lc->lcontext.LeaseState);
3641}
3642
7f6c5008
PS		 3643static unsigned int
3644smb2_wp_retry_size(struct inode *inode)
3645{
3646 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3647 SMB2_MAX_BUFFER_SIZE);
3648}
3649
52755808
PS		 3650static bool
3651smb2_dir_needs_close(struct cifsFileInfo *cfile)
3652{
3653 return !cfile->invalidHandle;
3654}
3655
026e93dc 3656static void
977b6170 3657fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
2b2f7548 3658 struct smb_rqst *old_rq, __le16 cipher_type)
026e93dc
PS		 3659{
3660 struct smb2_sync_hdr *shdr =
c713c877 3661 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
026e93dc
PS		 3662
3663 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3664 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3665 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3666 tr_hdr->Flags = cpu_to_le16(0x01);
2b2f7548
SF		 3667 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3668 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3669 else
3670 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
026e93dc 3671 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
026e93dc
PS		 3672}
3673
262916bc
RS		 3674/* We can not use the normal sg_set_buf() as we will sometimes pass a
3675 * stack object as buf.
3676 */
3677static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3678 unsigned int buflen)
3679{
ee9d6618
ST		 3680 void *addr;
3681 /*
3682 * VMAP_STACK (at least) puts stack into the vmalloc address space
3683 */
3684 if (is_vmalloc_addr(buf))
3685 addr = vmalloc_to_page(buf);
3686 else
3687 addr = virt_to_page(buf);
3688 sg_set_page(sg, addr, buflen, offset_in_page(buf));
262916bc
RS		 3689}
3690
b2c96de7
RS		 3691/* Assumes the first rqst has a transform header as the first iov.
3692 * I.e.
3693 * rqst[0].rq_iov[0] is transform header
3694 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3695 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
977b6170 3696 */
026e93dc 3697static struct scatterlist *
b2c96de7 3698init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
026e93dc 3699{
b2c96de7 3700 unsigned int sg_len;
026e93dc
PS		 3701 struct scatterlist *sg;
3702 unsigned int i;
3703 unsigned int j;
b2c96de7
RS		 3704 unsigned int idx = 0;
3705 int skip;
3706
3707 sg_len = 1;
3708 for (i = 0; i < num_rqst; i++)
3709 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
026e93dc
PS		 3710
3711 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3712 if (!sg)
3713 return NULL;
3714
3715 sg_init_table(sg, sg_len);
b2c96de7
RS		 3716 for (i = 0; i < num_rqst; i++) {
3717 for (j = 0; j < rqst[i].rq_nvec; j++) {
3718 /*
3719 * The first rqst has a transform header where the
3720 * first 20 bytes are not part of the encrypted blob
3721 */
3722 skip = (i == 0) && (j == 0) ? 20 : 0;
3723 smb2_sg_set_buf(&sg[idx++],
3724 rqst[i].rq_iov[j].iov_base + skip,
3725 rqst[i].rq_iov[j].iov_len - skip);
e77fe73c 3726 }
b2c96de7
RS		 3727
3728 for (j = 0; j < rqst[i].rq_npages; j++) {
3729 unsigned int len, offset;
d5f07fb3 3730
b2c96de7
RS		 3731 rqst_page_get_length(&rqst[i], j, &len, &offset);
3732 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3733 }
026e93dc 3734 }
b2c96de7 3735 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
026e93dc
PS		 3736 return sg;
3737}
3738
61cfac6f
PS		 3739static int
3740smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3741{
3742 struct cifs_ses *ses;
3743 u8 *ses_enc_key;
3744
3745 spin_lock(&cifs_tcp_ses_lock);
d70e9fa5
AA		 3746 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
3747 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3748 if (ses->Suid == ses_id) {
3749 ses_enc_key = enc ? ses->smb3encryptionkey :
3750 ses->smb3decryptionkey;
3751 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3752 spin_unlock(&cifs_tcp_ses_lock);
3753 return 0;
3754 }
3755 }
61cfac6f
PS		 3756 }
3757 spin_unlock(&cifs_tcp_ses_lock);
3758
3759 return 1;
3760}
026e93dc 3761/*
c713c877
RS		 3762 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3763 * iov[0] - transform header (associate data),
3764 * iov[1-N] - SMB2 header and pages - data to encrypt.
3765 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
026e93dc
PS		 3766 * untouched.
3767 */
3768static int
b2c96de7
RS		 3769crypt_message(struct TCP_Server_Info *server, int num_rqst,
3770 struct smb_rqst *rqst, int enc)
026e93dc
PS		 3771{
3772 struct smb2_transform_hdr *tr_hdr =
b2c96de7 3773 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
1fc6ad2f 3774 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
026e93dc
PS		 3775 int rc = 0;
3776 struct scatterlist *sg;
3777 u8 sign[SMB2_SIGNATURE_SIZE] = {};
61cfac6f 3778 u8 key[SMB3_SIGN_KEY_SIZE];
026e93dc
PS		 3779 struct aead_request *req;
3780 char *iv;
3781 unsigned int iv_len;
a5186b85 3782 DECLARE_CRYPTO_WAIT(wait);
026e93dc
PS		 3783 struct crypto_aead *tfm;
3784 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3785
61cfac6f
PS		 3786 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3787 if (rc) {
3175eb9b 3788 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
61cfac6f 3789 enc ? "en" : "de");
026e93dc
PS		 3790 return 0;
3791 }
3792
3793 rc = smb3_crypto_aead_allocate(server);
3794 if (rc) {
3175eb9b 3795 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
026e93dc
PS		 3796 return rc;
3797 }
3798
3799 tfm = enc ? server->secmech.ccmaesencrypt :
3800 server->secmech.ccmaesdecrypt;
61cfac6f 3801 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
026e93dc 3802 if (rc) {
3175eb9b 3803 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
026e93dc
PS		 3804 return rc;
3805 }
3806
3807 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3808 if (rc) {
3175eb9b 3809 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
026e93dc
PS		 3810 return rc;
3811 }
3812
3813 req = aead_request_alloc(tfm, GFP_KERNEL);
3814 if (!req) {
3175eb9b 3815 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
026e93dc
PS		 3816 return -ENOMEM;
3817 }
3818
3819 if (!enc) {
3820 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3821 crypt_len += SMB2_SIGNATURE_SIZE;
3822 }
3823
b2c96de7 3824 sg = init_sg(num_rqst, rqst, sign);
026e93dc 3825 if (!sg) {
3175eb9b 3826 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
517a6e43 3827 rc = -ENOMEM;
026e93dc
PS		 3828 goto free_req;
3829 }
3830
3831 iv_len = crypto_aead_ivsize(tfm);
3832 iv = kzalloc(iv_len, GFP_KERNEL);
3833 if (!iv) {
3175eb9b 3834 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
517a6e43 3835 rc = -ENOMEM;
026e93dc
PS		 3836 goto free_sg;
3837 }
2b2f7548
SF		 3838
3839 if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3840 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3841 else {
3842 iv[0] = 3;
3843 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3844 }
026e93dc
PS		 3845
3846 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3847 aead_request_set_ad(req, assoc_data_len);
3848
3849 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
a5186b85 3850 crypto_req_done, &wait);
026e93dc 3851
a5186b85
GBY		 3852 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3853 : crypto_aead_decrypt(req), &wait);
026e93dc
PS		 3854
3855 if (!rc && enc)
3856 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3857
3858 kfree(iv);
3859free_sg:
3860 kfree(sg);
3861free_req:
3862 kfree(req);
3863 return rc;
3864}
3865
b2c96de7
RS		 3866void
3867smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3868{
3869 int i, j;
3870
3871 for (i = 0; i < num_rqst; i++) {
3872 if (rqst[i].rq_pages) {
3873 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3874 put_page(rqst[i].rq_pages[j]);
3875 kfree(rqst[i].rq_pages);
3876 }
3877 }
3878}
3879
3880/*
3881 * This function will initialize new_rq and encrypt the content.
3882 * The first entry, new_rq[0], only contains a single iov which contains
3883 * a smb2_transform_hdr and is pre-allocated by the caller.
3884 * This function then populates new_rq[1+] with the content from olq_rq[0+].
3885 *
3886 * The end result is an array of smb_rqst structures where the first structure
3887 * only contains a single iov for the transform header which we then can pass
3888 * to crypt_message().
3889 *
3890 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
3891 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3892 */
026e93dc 3893static int
b2c96de7
RS		 3894smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3895 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
026e93dc 3896{
026e93dc 3897 struct page **pages;
b2c96de7
RS		 3898 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3899 unsigned int npages;
3900 unsigned int orig_len = 0;
3901 int i, j;
026e93dc
PS		 3902 int rc = -ENOMEM;
3903
b2c96de7
RS		 3904 for (i = 1; i < num_rqst; i++) {
3905 npages = old_rq[i - 1].rq_npages;
3906 pages = kmalloc_array(npages, sizeof(struct page *),
3907 GFP_KERNEL);
3908 if (!pages)
3909 goto err_free;
3910
3911 new_rq[i].rq_pages = pages;
3912 new_rq[i].rq_npages = npages;
3913 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3914 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3915 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3916 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3917 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3918
3919 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3920
3921 for (j = 0; j < npages; j++) {
3922 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3923 if (!pages[j])
3924 goto err_free;
3925 }
026e93dc 3926
b2c96de7
RS		 3927 /* copy pages form the old */
3928 for (j = 0; j < npages; j++) {
3929 char *dst, *src;
3930 unsigned int offset, len;
977b6170 3931
b2c96de7 3932 rqst_page_get_length(&new_rq[i], j, &len, &offset);
026e93dc 3933
b2c96de7
RS		 3934 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3935 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
026e93dc 3936
b2c96de7
RS		 3937 memcpy(dst, src, len);
3938 kunmap(new_rq[i].rq_pages[j]);
3939 kunmap(old_rq[i - 1].rq_pages[j]);
3940 }
3941 }
35e2cc1b 3942
b2c96de7 3943 /* fill the 1st iov with a transform header */
2b2f7548 3944 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
d5f07fb3 3945
b2c96de7 3946 rc = crypt_message(server, num_rqst, new_rq, 1);
a205d500 3947 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
026e93dc 3948 if (rc)
b2c96de7 3949 goto err_free;
026e93dc
PS		 3950
3951 return rc;
3952
b2c96de7
RS		 3953err_free:
3954 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
026e93dc
PS		 3955 return rc;
3956}
3957
4326ed2f
PS		 3958static int
3959smb3_is_transform_hdr(void *buf)
3960{
3961 struct smb2_transform_hdr *trhdr = buf;
3962
3963 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3964}
3965
3966static int
3967decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3968 unsigned int buf_data_size, struct page **pages,
3969 unsigned int npages, unsigned int page_data_size)
3970{
c713c877 3971 struct kvec iov[2];
4326ed2f 3972 struct smb_rqst rqst = {NULL};
4326ed2f
PS		 3973 int rc;
3974
c713c877
RS		 3975 iov[0].iov_base = buf;
3976 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3977 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3978 iov[1].iov_len = buf_data_size;
4326ed2f
PS		 3979
3980 rqst.rq_iov = iov;
c713c877 3981 rqst.rq_nvec = 2;
4326ed2f
PS		 3982 rqst.rq_pages = pages;
3983 rqst.rq_npages = npages;
3984 rqst.rq_pagesz = PAGE_SIZE;
3985 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3986
b2c96de7 3987 rc = crypt_message(server, 1, &rqst, 0);
a205d500 3988 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4326ed2f
PS		 3989
3990 if (rc)
3991 return rc;
3992
c713c877 3993 memmove(buf, iov[1].iov_base, buf_data_size);
977b6170
RS		 3994
3995 server->total_read = buf_data_size + page_data_size;
4326ed2f
PS		 3996
3997 return rc;
3998}
3999
c42a6abe
PS		 4000static int
4001read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4002 unsigned int npages, unsigned int len)
4003{
4004 int i;
4005 int length;
4006
4007 for (i = 0; i < npages; i++) {
4008 struct page *page = pages[i];
4009 size_t n;
4010
4011 n = len;
4012 if (len >= PAGE_SIZE) {
4013 /* enough data to fill the page */
4014 n = PAGE_SIZE;
4015 len -= n;
4016 } else {
4017 zero_user(page, len, PAGE_SIZE - len);
4018 len = 0;
4019 }
1dbe3466 4020 length = cifs_read_page_from_socket(server, page, 0, n);
c42a6abe
PS		 4021 if (length < 0)
4022 return length;
4023 server->total_read += length;
4024 }
4025
4026 return 0;
4027}
4028
4029static int
4030init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4031 unsigned int cur_off, struct bio_vec **page_vec)
4032{
4033 struct bio_vec *bvec;
4034 int i;
4035
4036 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4037 if (!bvec)
4038 return -ENOMEM;
4039
4040 for (i = 0; i < npages; i++) {
4041 bvec[i].bv_page = pages[i];
4042 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4043 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4044 data_size -= bvec[i].bv_len;
4045 }
4046
4047 if (data_size != 0) {
4048 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4049 kfree(bvec);
4050 return -EIO;
4051 }
4052
4053 *page_vec = bvec;
4054 return 0;
4055}
4056
4326ed2f
PS		 4057static int
4058handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4059 char *buf, unsigned int buf_len, struct page **pages,
4060 unsigned int npages, unsigned int page_data_size)
4061{
4062 unsigned int data_offset;
4063 unsigned int data_len;
c42a6abe
PS		 4064 unsigned int cur_off;
4065 unsigned int cur_page_idx;
4066 unsigned int pad_len;
4326ed2f 4067 struct cifs_readdata *rdata = mid->callback_data;
49f466bd 4068 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4326ed2f
PS		 4069 struct bio_vec *bvec = NULL;
4070 struct iov_iter iter;
4071 struct kvec iov;
4072 int length;
74dcf418 4073 bool use_rdma_mr = false;
4326ed2f
PS		 4074
4075 if (shdr->Command != SMB2_READ) {
3175eb9b 4076 cifs_server_dbg(VFS, "only big read responses are supported\n");
4326ed2f
PS		 4077 return -ENOTSUPP;
4078 }
4079
511c54a2
PS		 4080 if (server->ops->is_session_expired &&
4081 server->ops->is_session_expired(buf)) {
4082 cifs_reconnect(server);
4083 wake_up(&server->response_q);
4084 return -1;
4085 }
4086
4326ed2f 4087 if (server->ops->is_status_pending &&
66265f13 4088 server->ops->is_status_pending(buf, server))
4326ed2f
PS		 4089 return -1;
4090
ec678eae
PS		 4091 /* set up first two iov to get credits */
4092 rdata->iov[0].iov_base = buf;
bb1bccb6
PS		 4093 rdata->iov[0].iov_len = 0;
4094 rdata->iov[1].iov_base = buf;
ec678eae 4095 rdata->iov[1].iov_len =
bb1bccb6 4096 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
ec678eae
PS		 4097 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4098 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4099 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4100 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4101
4102 rdata->result = server->ops->map_error(buf, true);
4326ed2f
PS		 4103 if (rdata->result != 0) {
4104 cifs_dbg(FYI, "%s: server returned error %d\n",
4105 __func__, rdata->result);
ec678eae
PS		 4106 /* normal error on read response */
4107 dequeue_mid(mid, false);
4326ed2f
PS		 4108 return 0;
4109 }
4110
1fc6ad2f 4111 data_offset = server->ops->read_data_offset(buf);
74dcf418
LL		 4112#ifdef CONFIG_CIFS_SMB_DIRECT
4113 use_rdma_mr = rdata->mr;
4114#endif
4115 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4326ed2f
PS		 4116
4117 if (data_offset < server->vals->read_rsp_size) {
4118 /*
4119 * win2k8 sometimes sends an offset of 0 when the read
4120 * is beyond the EOF. Treat it as if the data starts just after
4121 * the header.
4122 */
4123 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4124 __func__, data_offset);
4125 data_offset = server->vals->read_rsp_size;
4126 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4127 /* data_offset is beyond the end of smallbuf */
4128 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4129 __func__, data_offset);
4130 rdata->result = -EIO;
4131 dequeue_mid(mid, rdata->result);
4132 return 0;
4133 }
4134
c42a6abe
PS		 4135 pad_len = data_offset - server->vals->read_rsp_size;
4136
4326ed2f
PS		 4137 if (buf_len <= data_offset) {
4138 /* read response payload is in pages */
c42a6abe
PS		 4139 cur_page_idx = pad_len / PAGE_SIZE;
4140 cur_off = pad_len % PAGE_SIZE;
4141
4142 if (cur_page_idx != 0) {
4143 /* data offset is beyond the 1st page of response */
4144 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4145 __func__, data_offset);
4146 rdata->result = -EIO;
4147 dequeue_mid(mid, rdata->result);
4148 return 0;
4149 }
4150
4151 if (data_len > page_data_size - pad_len) {
4152 /* data_len is corrupt -- discard frame */
4153 rdata->result = -EIO;
4154 dequeue_mid(mid, rdata->result);
4155 return 0;
4156 }
4157
4158 rdata->result = init_read_bvec(pages, npages, page_data_size,
4159 cur_off, &bvec);
4160 if (rdata->result != 0) {
4161 dequeue_mid(mid, rdata->result);
4162 return 0;
4163 }
4164
aa563d7b 4165 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4326ed2f
PS		 4166 } else if (buf_len >= data_offset + data_len) {
4167 /* read response payload is in buf */
4168 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4169 iov.iov_base = buf + data_offset;
4170 iov.iov_len = data_len;
aa563d7b 4171 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4326ed2f
PS		 4172 } else {
4173 /* read response payload cannot be in both buf and pages */
4174 WARN_ONCE(1, "buf can not contain only a part of read data");
4175 rdata->result = -EIO;
4176 dequeue_mid(mid, rdata->result);
4177 return 0;
4178 }
4179
4326ed2f
PS		 4180 length = rdata->copy_into_pages(server, rdata, &iter);
4181
4182 kfree(bvec);
4183
4184 if (length < 0)
4185 return length;
4186
4187 dequeue_mid(mid, false);
4188 return length;
4189}
4190
35cf94a3
SF		 4191struct smb2_decrypt_work {
4192 struct work_struct decrypt;
4193 struct TCP_Server_Info *server;
4194 struct page **ppages;
4195 char *buf;
4196 unsigned int npages;
4197 unsigned int len;
4198};
4199
4200
4201static void smb2_decrypt_offload(struct work_struct *work)
4202{
4203 struct smb2_decrypt_work *dw = container_of(work,
4204 struct smb2_decrypt_work, decrypt);
4205 int i, rc;
4206 struct mid_q_entry *mid;
4207
4208 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4209 dw->ppages, dw->npages, dw->len);
4210 if (rc) {
4211 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4212 goto free_pages;
4213 }
4214
2255397c 4215 dw->server->lstrp = jiffies;
35cf94a3
SF		 4216 mid = smb2_find_mid(dw->server, dw->buf);
4217 if (mid == NULL)
4218 cifs_dbg(FYI, "mid not found\n");
4219 else {
4220 mid->decrypted = true;
4221 rc = handle_read_data(dw->server, mid, dw->buf,
4222 dw->server->vals->read_rsp_size,
4223 dw->ppages, dw->npages, dw->len);
2255397c
SF		 4224 mid->callback(mid);
4225 cifs_mid_q_entry_release(mid);
35cf94a3
SF		 4226 }
4227
35cf94a3
SF		 4228free_pages:
4229 for (i = dw->npages-1; i >= 0; i--)
4230 put_page(dw->ppages[i]);
4231
4232 kfree(dw->ppages);
4233 cifs_small_buf_release(dw->buf);
a08d897b 4234 kfree(dw);
35cf94a3
SF		 4235}
4236
4237
c42a6abe 4238static int
35cf94a3
SF		 4239receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4240 int *num_mids)
c42a6abe
PS		 4241{
4242 char *buf = server->smallbuf;
4243 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4244 unsigned int npages;
4245 struct page **pages;
4246 unsigned int len;
1fc6ad2f 4247 unsigned int buflen = server->pdu_size;
c42a6abe
PS		 4248 int rc;
4249 int i = 0;
35cf94a3 4250 struct smb2_decrypt_work *dw;
c42a6abe 4251
35cf94a3 4252 *num_mids = 1;
1fc6ad2f 4253 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
c42a6abe
PS		 4254 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4255
4256 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4257 if (rc < 0)
4258 return rc;
4259 server->total_read += rc;
4260
1fc6ad2f 4261 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
93012bf9 4262 server->vals->read_rsp_size;
c42a6abe
PS		 4263 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4264
4265 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4266 if (!pages) {
4267 rc = -ENOMEM;
4268 goto discard_data;
4269 }
4270
4271 for (; i < npages; i++) {
4272 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4273 if (!pages[i]) {
4274 rc = -ENOMEM;
4275 goto discard_data;
4276 }
4277 }
4278
4279 /* read read data into pages */
4280 rc = read_data_into_pages(server, pages, npages, len);
4281 if (rc)
4282 goto free_pages;
4283
350be257 4284 rc = cifs_discard_remaining_data(server);
c42a6abe
PS		 4285 if (rc)
4286 goto free_pages;
4287
35cf94a3
SF		 4288 /*
4289 * For large reads, offload to different thread for better performance,
4290 * use more cores decrypting which can be expensive
4291 */
4292
10328c44 4293 if ((server->min_offload) && (server->in_flight > 1) &&
563317ec 4294 (server->pdu_size >= server->min_offload)) {
35cf94a3
SF		 4295 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4296 if (dw == NULL)
4297 goto non_offloaded_decrypt;
4298
4299 dw->buf = server->smallbuf;
4300 server->smallbuf = (char *)cifs_small_buf_get();
4301
4302 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4303
4304 dw->npages = npages;
4305 dw->server = server;
4306 dw->ppages = pages;
4307 dw->len = len;
a08d897b 4308 queue_work(decrypt_wq, &dw->decrypt);
35cf94a3
SF		 4309 *num_mids = 0; /* worker thread takes care of finding mid */
4310 return -1;
4311 }
4312
4313non_offloaded_decrypt:
1fc6ad2f 4314 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
c42a6abe
PS		 4315 pages, npages, len);
4316 if (rc)
4317 goto free_pages;
4318
4319 *mid = smb2_find_mid(server, buf);
4320 if (*mid == NULL)
4321 cifs_dbg(FYI, "mid not found\n");
4322 else {
4323 cifs_dbg(FYI, "mid found\n");
4324 (*mid)->decrypted = true;
4325 rc = handle_read_data(server, *mid, buf,
4326 server->vals->read_rsp_size,
4327 pages, npages, len);
4328 }
4329
4330free_pages:
4331 for (i = i - 1; i >= 0; i--)
4332 put_page(pages[i]);
4333 kfree(pages);
4334 return rc;
4335discard_data:
350be257 4336 cifs_discard_remaining_data(server);
c42a6abe
PS		 4337 goto free_pages;
4338}
4339
4326ed2f
PS		 4340static int
4341receive_encrypted_standard(struct TCP_Server_Info *server,
b24df3e3
RS		 4342 struct mid_q_entry **mids, char **bufs,
4343 int *num_mids)
4326ed2f 4344{
b24df3e3 4345 int ret, length;
4326ed2f 4346 char *buf = server->smallbuf;
b24df3e3 4347 struct smb2_sync_hdr *shdr;
2e96467d 4348 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 4349 unsigned int buf_size;
4350 struct mid_q_entry *mid_entry;
b24df3e3
RS		 4351 int next_is_large;
4352 char *next_buffer = NULL;
4353
4354 *num_mids = 0;
4326ed2f
PS		 4355
4356 /* switch to large buffer if too big for a small one */
1fc6ad2f 4357 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4326ed2f
PS		 4358 server->large_buf = true;
4359 memcpy(server->bigbuf, buf, server->total_read);
4360 buf = server->bigbuf;
4361 }
4362
4363 /* now read the rest */
4364 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
1fc6ad2f 4365 pdu_length - HEADER_SIZE(server) + 1);
4326ed2f
PS		 4366 if (length < 0)
4367 return length;
4368 server->total_read += length;
4369
1fc6ad2f 4370 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4326ed2f
PS		 4371 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4372 if (length)
4373 return length;
4374
b24df3e3 4375 next_is_large = server->large_buf;
3edeb4a4 4376one_more:
b24df3e3
RS		 4377 shdr = (struct smb2_sync_hdr *)buf;
4378 if (shdr->NextCommand) {
3edeb4a4 4379 if (next_is_large)
b24df3e3 4380 next_buffer = (char *)cifs_buf_get();
3edeb4a4 4381 else
b24df3e3 4382 next_buffer = (char *)cifs_small_buf_get();
b24df3e3 4383 memcpy(next_buffer,
3edeb4a4 4384 buf + le32_to_cpu(shdr->NextCommand),
b24df3e3
RS		 4385 pdu_length - le32_to_cpu(shdr->NextCommand));
4386 }
4387
4326ed2f
PS		 4388 mid_entry = smb2_find_mid(server, buf);
4389 if (mid_entry == NULL)
4390 cifs_dbg(FYI, "mid not found\n");
4391 else {
4392 cifs_dbg(FYI, "mid found\n");
4393 mid_entry->decrypted = true;
b24df3e3 4394 mid_entry->resp_buf_size = server->pdu_size;
4326ed2f
PS		 4395 }
4396
b24df3e3 4397 if (*num_mids >= MAX_COMPOUND) {
3175eb9b 4398 cifs_server_dbg(VFS, "too many PDUs in compound\n");
b24df3e3
RS		 4399 return -1;
4400 }
4401 bufs[*num_mids] = buf;
4402 mids[(*num_mids)++] = mid_entry;
4326ed2f
PS		 4403
4404 if (mid_entry && mid_entry->handle)
b24df3e3
RS		 4405 ret = mid_entry->handle(server, mid_entry);
4406 else
4407 ret = cifs_handle_standard(server, mid_entry);
4408
4409 if (ret == 0 && shdr->NextCommand) {
4410 pdu_length -= le32_to_cpu(shdr->NextCommand);
4411 server->large_buf = next_is_large;
4412 if (next_is_large)
3edeb4a4 4413 server->bigbuf = buf = next_buffer;
b24df3e3 4414 else
3edeb4a4 4415 server->smallbuf = buf = next_buffer;
b24df3e3 4416 goto one_more;
3edeb4a4
PS		 4417 } else if (ret != 0) {
4418 /*
4419 * ret != 0 here means that we didn't get to handle_mid() thus
4420 * server->smallbuf and server->bigbuf are still valid. We need
4421 * to free next_buffer because it is not going to be used
4422 * anywhere.
4423 */
4424 if (next_is_large)
4425 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4426 else
4427 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
b24df3e3 4428 }
4326ed2f 4429
b24df3e3 4430 return ret;
4326ed2f
PS		 4431}
4432
4433static int
b24df3e3
RS		 4434smb3_receive_transform(struct TCP_Server_Info *server,
4435 struct mid_q_entry **mids, char **bufs, int *num_mids)
4326ed2f
PS		 4436{
4437 char *buf = server->smallbuf;
2e96467d 4438 unsigned int pdu_length = server->pdu_size;
4326ed2f
PS		 4439 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4440 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4441
1fc6ad2f 4442 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4326ed2f 4443 sizeof(struct smb2_sync_hdr)) {
3175eb9b 4444 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4326ed2f
PS		 4445 pdu_length);
4446 cifs_reconnect(server);
4447 wake_up(&server->response_q);
4448 return -ECONNABORTED;
4449 }
4450
1fc6ad2f 4451 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
3175eb9b 4452 cifs_server_dbg(VFS, "Transform message is broken\n");
4326ed2f
PS		 4453 cifs_reconnect(server);
4454 wake_up(&server->response_q);
4455 return -ECONNABORTED;
4456 }
4457
b24df3e3 4458 /* TODO: add support for compounds containing READ. */
6d2f84ee 4459 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
35cf94a3 4460 return receive_encrypted_read(server, &mids[0], num_mids);
6d2f84ee 4461 }
4326ed2f 4462
b24df3e3 4463 return receive_encrypted_standard(server, mids, bufs, num_mids);
4326ed2f
PS		 4464}
4465
4466int
4467smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4468{
4469 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4470
1fc6ad2f 4471 return handle_read_data(server, mid, buf, server->pdu_size,
4326ed2f
PS		 4472 NULL, 0, 0);
4473}
4474
8ce79ec3
RS		 4475static int
4476smb2_next_header(char *buf)
4477{
4478 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4479 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4480
4481 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4482 return sizeof(struct smb2_transform_hdr) +
4483 le32_to_cpu(t_hdr->OriginalMessageSize);
4484
4485 return le32_to_cpu(hdr->NextCommand);
4486}
4487
c847dccf
AA		 4488static int
4489smb2_make_node(unsigned int xid, struct inode *inode,
4490 struct dentry *dentry, struct cifs_tcon *tcon,
4491 char *full_path, umode_t mode, dev_t dev)
4492{
4493 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4494 int rc = -EPERM;
4495 int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
4496 FILE_ALL_INFO *buf = NULL;
4497 struct cifs_io_parms io_parms;
4498 __u32 oplock = 0;
4499 struct cifs_fid fid;
4500 struct cifs_open_parms oparms;
4501 unsigned int bytes_written;
4502 struct win_dev *pdev;
4503 struct kvec iov[2];
4504
4505 /*
4506 * Check if mounted with mount parm 'sfu' mount parm.
4507 * SFU emulation should work with all servers, but only
4508 * supports block and char device (no socket & fifo),
4509 * and was used by default in earlier versions of Windows
4510 */
4511 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4512 goto out;
4513
4514 /*
4515 * TODO: Add ability to create instead via reparse point. Windows (e.g.
4516 * their current NFS server) uses this approach to expose special files
4517 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4518 */
4519
4520 if (!S_ISCHR(mode) && !S_ISBLK(mode))
4521 goto out;
4522
4523 cifs_dbg(FYI, "sfu compat create special file\n");
4524
4525 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4526 if (buf == NULL) {
4527 rc = -ENOMEM;
4528 goto out;
4529 }
4530
4531 if (backup_cred(cifs_sb))
4532 create_options |= CREATE_OPEN_BACKUP_INTENT;
4533
4534 oparms.tcon = tcon;
4535 oparms.cifs_sb = cifs_sb;
4536 oparms.desired_access = GENERIC_WRITE;
4537 oparms.create_options = create_options;
4538 oparms.disposition = FILE_CREATE;
4539 oparms.path = full_path;
4540 oparms.fid = &fid;
4541 oparms.reconnect = false;
4542
4543 if (tcon->ses->server->oplocks)
4544 oplock = REQ_OPLOCK;
4545 else
4546 oplock = 0;
4547 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4548 if (rc)
4549 goto out;
4550
4551 /*
4552 * BB Do not bother to decode buf since no local inode yet to put
4553 * timestamps in, but we can reuse it safely.
4554 */
4555
4556 pdev = (struct win_dev *)buf;
4557 io_parms.pid = current->tgid;
4558 io_parms.tcon = tcon;
4559 io_parms.offset = 0;
4560 io_parms.length = sizeof(struct win_dev);
4561 iov[1].iov_base = buf;
4562 iov[1].iov_len = sizeof(struct win_dev);
4563 if (S_ISCHR(mode)) {
4564 memcpy(pdev->type, "IntxCHR", 8);
4565 pdev->major = cpu_to_le64(MAJOR(dev));
4566 pdev->minor = cpu_to_le64(MINOR(dev));
4567 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4568 &bytes_written, iov, 1);
4569 } else if (S_ISBLK(mode)) {
4570 memcpy(pdev->type, "IntxBLK", 8);
4571 pdev->major = cpu_to_le64(MAJOR(dev));
4572 pdev->minor = cpu_to_le64(MINOR(dev));
4573 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4574 &bytes_written, iov, 1);
4575 }
4576 tcon->ses->server->ops->close(xid, tcon, &fid);
4577 d_drop(dentry);
4578
4579 /* FIXME: add code here to set EAs */
4580out:
4581 kfree(buf);
4582 return rc;
4583}
4584
4585
53ef1016 4586struct smb_version_operations smb20_operations = {
027e8eec 4587 .compare_fids = smb2_compare_fids,
2dc7e1c0 4588 .setup_request = smb2_setup_request,
c95b8eed 4589 .setup_async_request = smb2_setup_async_request,
2dc7e1c0 4590 .check_receive = smb2_check_receive,
28ea5290
PS		 4591 .add_credits = smb2_add_credits,
4592 .set_credits = smb2_set_credits,
4593 .get_credits_field = smb2_get_credits_field,
4594 .get_credits = smb2_get_credits,
cb7e9eab 4595 .wait_mtu_credits = cifs_wait_mtu_credits,
2dc7e1c0 4596 .get_next_mid = smb2_get_next_mid,
c781af7e 4597 .revert_current_mid = smb2_revert_current_mid,
09a4707e
PS		 4598 .read_data_offset = smb2_read_data_offset,
4599 .read_data_length = smb2_read_data_length,
4600 .map_error = map_smb2_to_linux_error,
093b2bda
PS		 4601 .find_mid = smb2_find_mid,
4602 .check_message = smb2_check_message,
4603 .dump_detail = smb2_dump_detail,
d60622eb
PS		 4604 .clear_stats = smb2_clear_stats,
4605 .print_stats = smb2_print_stats,
983c88a4 4606 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 4607 .handle_cancelled_mid = smb2_handle_cancelled_mid,
c11f1df5 4608 .downgrade_oplock = smb2_downgrade_oplock,
ec2e4523
PS		 4609 .need_neg = smb2_need_neg,
4610 .negotiate = smb2_negotiate,
3a3bab50
PS		 4611 .negotiate_wsize = smb2_negotiate_wsize,
4612 .negotiate_rsize = smb2_negotiate_rsize,
5478f9ba
PS		 4613 .sess_setup = SMB2_sess_setup,
4614 .logoff = SMB2_logoff,
faaf946a
PS		 4615 .tree_connect = SMB2_tcon,
4616 .tree_disconnect = SMB2_tdis,
34f62640 4617 .qfs_tcon = smb2_qfs_tcon,
2503a0db 4618 .is_path_accessible = smb2_is_path_accessible,
9094fad1
PS		 4619 .can_echo = smb2_can_echo,
4620 .echo = SMB2_echo,
be4cb9e3
PS		 4621 .query_path_info = smb2_query_path_info,
4622 .get_srv_inum = smb2_get_srv_inum,
b7546bc5 4623 .query_file_info = smb2_query_file_info,
c839ff24
PS		 4624 .set_path_size = smb2_set_path_size,
4625 .set_file_size = smb2_set_file_size,
1feeaac7 4626 .set_file_info = smb2_set_file_info,
64a5cfa6 4627 .set_compression = smb2_set_compression,
a0e73183
PS		 4628 .mkdir = smb2_mkdir,
4629 .mkdir_setinfo = smb2_mkdir_setinfo,
1a500f01 4630 .rmdir = smb2_rmdir,
cbe6f439 4631 .unlink = smb2_unlink,
35143eb5 4632 .rename = smb2_rename_path,
568798cc 4633 .create_hardlink = smb2_create_hardlink,
b42bf888 4634 .query_symlink = smb2_query_symlink,
5b23c97d
SP		 4635 .query_mf_symlink = smb3_query_mf_symlink,
4636 .create_mf_symlink = smb3_create_mf_symlink,
f0df737e
PS		 4637 .open = smb2_open_file,
4638 .set_fid = smb2_set_fid,
4639 .close = smb2_close_file,
7a5cfb19 4640 .flush = smb2_flush_file,
09a4707e 4641 .async_readv = smb2_async_readv,
33319141 4642 .async_writev = smb2_async_writev,
d8e05039 4643 .sync_read = smb2_sync_read,
009d3443 4644 .sync_write = smb2_sync_write,
d324f08d
PS		 4645 .query_dir_first = smb2_query_dir_first,
4646 .query_dir_next = smb2_query_dir_next,
4647 .close_dir = smb2_close_dir,
4648 .calc_smb_size = smb2_calc_size,
2e44b288 4649 .is_status_pending = smb2_is_status_pending,
511c54a2 4650 .is_session_expired = smb2_is_session_expired,
983c88a4 4651 .oplock_response = smb2_oplock_response,
6fc05c25 4652 .queryfs = smb2_queryfs,
f7ba7fe6
PS		 4653 .mand_lock = smb2_mand_lock,
4654 .mand_unlock_range = smb2_unlock_range,
b140799a 4655 .push_mand_locks = smb2_push_mandatory_locks,
b8c32dbb
PS		 4656 .get_lease_key = smb2_get_lease_key,
4657 .set_lease_key = smb2_set_lease_key,
4658 .new_lease_key = smb2_new_lease_key,
38107d45 4659 .calc_signature = smb2_calc_signature,
53ef1016
PS		 4660 .is_read_op = smb2_is_read_op,
4661 .set_oplock_level = smb2_set_oplock_level,
a41a28bd 4662 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 4663 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 4664 .copychunk_range = smb2_copychunk_range,
7f6c5008 4665 .wp_retry_size = smb2_wp_retry_size,
52755808 4666 .dir_needs_close = smb2_dir_needs_close,
9d49640a 4667 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 4668 .select_sectype = smb2_select_sectype,
95907fea
RS		 4669#ifdef CONFIG_CIFS_XATTR
4670 .query_all_EAs = smb2_query_eas,
5517554e 4671 .set_EA = smb2_set_ea,
95907fea 4672#endif /* CIFS_XATTR */
2f1afe25
SP		 4673 .get_acl = get_smb2_acl,
4674 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 4675 .set_acl = set_smb2_acl,
8ce79ec3 4676 .next_header = smb2_next_header,
f5b05d62 4677 .ioctl_query_info = smb2_ioctl_query_info,
c847dccf 4678 .make_node = smb2_make_node,
2f3ebaba 4679 .fiemap = smb3_fiemap,
dece44e3 4680 .llseek = smb3_llseek,
38107d45
SF		 4681};
4682
53ef1016
PS		 4683struct smb_version_operations smb21_operations = {
4684 .compare_fids = smb2_compare_fids,
4685 .setup_request = smb2_setup_request,
4686 .setup_async_request = smb2_setup_async_request,
4687 .check_receive = smb2_check_receive,
4688 .add_credits = smb2_add_credits,
4689 .set_credits = smb2_set_credits,
4690 .get_credits_field = smb2_get_credits_field,
4691 .get_credits = smb2_get_credits,
cb7e9eab 4692 .wait_mtu_credits = smb2_wait_mtu_credits,
9a1c67e8 4693 .adjust_credits = smb2_adjust_credits,
53ef1016 4694 .get_next_mid = smb2_get_next_mid,
c781af7e 4695 .revert_current_mid = smb2_revert_current_mid,
53ef1016
PS		 4696 .read_data_offset = smb2_read_data_offset,
4697 .read_data_length = smb2_read_data_length,
4698 .map_error = map_smb2_to_linux_error,
4699 .find_mid = smb2_find_mid,
4700 .check_message = smb2_check_message,
4701 .dump_detail = smb2_dump_detail,
4702 .clear_stats = smb2_clear_stats,
4703 .print_stats = smb2_print_stats,
4704 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 4705 .handle_cancelled_mid = smb2_handle_cancelled_mid,
9bd45408 4706 .downgrade_oplock = smb2_downgrade_oplock,
53ef1016
PS		 4707 .need_neg = smb2_need_neg,
4708 .negotiate = smb2_negotiate,
4709 .negotiate_wsize = smb2_negotiate_wsize,
4710 .negotiate_rsize = smb2_negotiate_rsize,
4711 .sess_setup = SMB2_sess_setup,
4712 .logoff = SMB2_logoff,
4713 .tree_connect = SMB2_tcon,
4714 .tree_disconnect = SMB2_tdis,
34f62640 4715 .qfs_tcon = smb2_qfs_tcon,
53ef1016
PS		 4716 .is_path_accessible = smb2_is_path_accessible,
4717 .can_echo = smb2_can_echo,
4718 .echo = SMB2_echo,
4719 .query_path_info = smb2_query_path_info,
4720 .get_srv_inum = smb2_get_srv_inum,
4721 .query_file_info = smb2_query_file_info,
4722 .set_path_size = smb2_set_path_size,
4723 .set_file_size = smb2_set_file_size,
4724 .set_file_info = smb2_set_file_info,
64a5cfa6 4725 .set_compression = smb2_set_compression,
53ef1016
PS		 4726 .mkdir = smb2_mkdir,
4727 .mkdir_setinfo = smb2_mkdir_setinfo,
4728 .rmdir = smb2_rmdir,
4729 .unlink = smb2_unlink,
4730 .rename = smb2_rename_path,
4731 .create_hardlink = smb2_create_hardlink,
4732 .query_symlink = smb2_query_symlink,
c22870ea 4733 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 4734 .create_mf_symlink = smb3_create_mf_symlink,
53ef1016
PS		 4735 .open = smb2_open_file,
4736 .set_fid = smb2_set_fid,
4737 .close = smb2_close_file,
4738 .flush = smb2_flush_file,
4739 .async_readv = smb2_async_readv,
4740 .async_writev = smb2_async_writev,
4741 .sync_read = smb2_sync_read,
4742 .sync_write = smb2_sync_write,
4743 .query_dir_first = smb2_query_dir_first,
4744 .query_dir_next = smb2_query_dir_next,
4745 .close_dir = smb2_close_dir,
4746 .calc_smb_size = smb2_calc_size,
4747 .is_status_pending = smb2_is_status_pending,
511c54a2 4748 .is_session_expired = smb2_is_session_expired,
53ef1016
PS		 4749 .oplock_response = smb2_oplock_response,
4750 .queryfs = smb2_queryfs,
4751 .mand_lock = smb2_mand_lock,
4752 .mand_unlock_range = smb2_unlock_range,
4753 .push_mand_locks = smb2_push_mandatory_locks,
4754 .get_lease_key = smb2_get_lease_key,
4755 .set_lease_key = smb2_set_lease_key,
4756 .new_lease_key = smb2_new_lease_key,
4757 .calc_signature = smb2_calc_signature,
4758 .is_read_op = smb21_is_read_op,
4759 .set_oplock_level = smb21_set_oplock_level,
a41a28bd 4760 .create_lease_buf = smb2_create_lease_buf,
b5c7cde3 4761 .parse_lease_buf = smb2_parse_lease_buf,
312bbc59 4762 .copychunk_range = smb2_copychunk_range,
7f6c5008 4763 .wp_retry_size = smb2_wp_retry_size,
52755808 4764 .dir_needs_close = smb2_dir_needs_close,
834170c8 4765 .enum_snapshots = smb3_enum_snapshots,
9d49640a 4766 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 4767 .select_sectype = smb2_select_sectype,
95907fea
RS		 4768#ifdef CONFIG_CIFS_XATTR
4769 .query_all_EAs = smb2_query_eas,
5517554e 4770 .set_EA = smb2_set_ea,
95907fea 4771#endif /* CIFS_XATTR */
2f1afe25
SP		 4772 .get_acl = get_smb2_acl,
4773 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 4774 .set_acl = set_smb2_acl,
8ce79ec3 4775 .next_header = smb2_next_header,
f5b05d62 4776 .ioctl_query_info = smb2_ioctl_query_info,
c847dccf 4777 .make_node = smb2_make_node,
2f3ebaba 4778 .fiemap = smb3_fiemap,
dece44e3 4779 .llseek = smb3_llseek,
53ef1016 4780};
38107d45
SF		 4781
4782struct smb_version_operations smb30_operations = {
4783 .compare_fids = smb2_compare_fids,
4784 .setup_request = smb2_setup_request,
4785 .setup_async_request = smb2_setup_async_request,
4786 .check_receive = smb2_check_receive,
4787 .add_credits = smb2_add_credits,
4788 .set_credits = smb2_set_credits,
4789 .get_credits_field = smb2_get_credits_field,
4790 .get_credits = smb2_get_credits,
cb7e9eab 4791 .wait_mtu_credits = smb2_wait_mtu_credits,
9a1c67e8 4792 .adjust_credits = smb2_adjust_credits,
38107d45 4793 .get_next_mid = smb2_get_next_mid,
c781af7e 4794 .revert_current_mid = smb2_revert_current_mid,
38107d45
SF		 4795 .read_data_offset = smb2_read_data_offset,
4796 .read_data_length = smb2_read_data_length,
4797 .map_error = map_smb2_to_linux_error,
4798 .find_mid = smb2_find_mid,
4799 .check_message = smb2_check_message,
4800 .dump_detail = smb2_dump_detail,
4801 .clear_stats = smb2_clear_stats,
4802 .print_stats = smb2_print_stats,
769ee6a4 4803 .dump_share_caps = smb2_dump_share_caps,
38107d45 4804 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 4805 .handle_cancelled_mid = smb2_handle_cancelled_mid,
9bd45408 4806 .downgrade_oplock = smb3_downgrade_oplock,
38107d45
SF		 4807 .need_neg = smb2_need_neg,
4808 .negotiate = smb2_negotiate,
3d621230
SF		 4809 .negotiate_wsize = smb3_negotiate_wsize,
4810 .negotiate_rsize = smb3_negotiate_rsize,
38107d45
SF		 4811 .sess_setup = SMB2_sess_setup,
4812 .logoff = SMB2_logoff,
4813 .tree_connect = SMB2_tcon,
4814 .tree_disconnect = SMB2_tdis,
af6a12ea 4815 .qfs_tcon = smb3_qfs_tcon,
38107d45
SF		 4816 .is_path_accessible = smb2_is_path_accessible,
4817 .can_echo = smb2_can_echo,
4818 .echo = SMB2_echo,
4819 .query_path_info = smb2_query_path_info,
4820 .get_srv_inum = smb2_get_srv_inum,
4821 .query_file_info = smb2_query_file_info,
4822 .set_path_size = smb2_set_path_size,
4823 .set_file_size = smb2_set_file_size,
4824 .set_file_info = smb2_set_file_info,
64a5cfa6 4825 .set_compression = smb2_set_compression,
38107d45
SF		 4826 .mkdir = smb2_mkdir,
4827 .mkdir_setinfo = smb2_mkdir_setinfo,
4828 .rmdir = smb2_rmdir,
4829 .unlink = smb2_unlink,
4830 .rename = smb2_rename_path,
4831 .create_hardlink = smb2_create_hardlink,
b42bf888 4832 .query_symlink = smb2_query_symlink,
c22870ea 4833 .query_mf_symlink = smb3_query_mf_symlink,
5ab97578 4834 .create_mf_symlink = smb3_create_mf_symlink,
38107d45
SF		 4835 .open = smb2_open_file,
4836 .set_fid = smb2_set_fid,
4837 .close = smb2_close_file,
43f8a6a7 4838 .close_getattr = smb2_close_getattr,
38107d45
SF		 4839 .flush = smb2_flush_file,
4840 .async_readv = smb2_async_readv,
4841 .async_writev = smb2_async_writev,
4842 .sync_read = smb2_sync_read,
4843 .sync_write = smb2_sync_write,
4844 .query_dir_first = smb2_query_dir_first,
4845 .query_dir_next = smb2_query_dir_next,
4846 .close_dir = smb2_close_dir,
4847 .calc_smb_size = smb2_calc_size,
4848 .is_status_pending = smb2_is_status_pending,
511c54a2 4849 .is_session_expired = smb2_is_session_expired,
38107d45
SF		 4850 .oplock_response = smb2_oplock_response,
4851 .queryfs = smb2_queryfs,
4852 .mand_lock = smb2_mand_lock,
4853 .mand_unlock_range = smb2_unlock_range,
4854 .push_mand_locks = smb2_push_mandatory_locks,
4855 .get_lease_key = smb2_get_lease_key,
4856 .set_lease_key = smb2_set_lease_key,
4857 .new_lease_key = smb2_new_lease_key,
373512ec 4858 .generate_signingkey = generate_smb30signingkey,
38107d45 4859 .calc_signature = smb3_calc_signature,
b3152e2c 4860 .set_integrity = smb3_set_integrity,
53ef1016 4861 .is_read_op = smb21_is_read_op,
42873b0a 4862 .set_oplock_level = smb3_set_oplock_level,
f047390a
PS		 4863 .create_lease_buf = smb3_create_lease_buf,
4864 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 4865 .copychunk_range = smb2_copychunk_range,
ca9e7a1c 4866 .duplicate_extents = smb2_duplicate_extents,
ff1c038a 4867 .validate_negotiate = smb3_validate_negotiate,
7f6c5008 4868 .wp_retry_size = smb2_wp_retry_size,
52755808 4869 .dir_needs_close = smb2_dir_needs_close,
31742c5a 4870 .fallocate = smb3_fallocate,
834170c8 4871 .enum_snapshots = smb3_enum_snapshots,
026e93dc 4872 .init_transform_rq = smb3_init_transform_rq,
4326ed2f
PS		 4873 .is_transform_hdr = smb3_is_transform_hdr,
4874 .receive_transform = smb3_receive_transform,
9d49640a 4875 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 4876 .select_sectype = smb2_select_sectype,
95907fea
RS		 4877#ifdef CONFIG_CIFS_XATTR
4878 .query_all_EAs = smb2_query_eas,
5517554e 4879 .set_EA = smb2_set_ea,
95907fea 4880#endif /* CIFS_XATTR */
2f1afe25
SP		 4881 .get_acl = get_smb2_acl,
4882 .get_acl_by_fid = get_smb2_acl_by_fid,
366ed846 4883 .set_acl = set_smb2_acl,
8ce79ec3 4884 .next_header = smb2_next_header,
f5b05d62 4885 .ioctl_query_info = smb2_ioctl_query_info,
c847dccf 4886 .make_node = smb2_make_node,
2f3ebaba 4887 .fiemap = smb3_fiemap,
dece44e3 4888 .llseek = smb3_llseek,
1080ef75
SF		 4889};
4890
aab1893d
SF		 4891struct smb_version_operations smb311_operations = {
4892 .compare_fids = smb2_compare_fids,
4893 .setup_request = smb2_setup_request,
4894 .setup_async_request = smb2_setup_async_request,
4895 .check_receive = smb2_check_receive,
4896 .add_credits = smb2_add_credits,
4897 .set_credits = smb2_set_credits,
4898 .get_credits_field = smb2_get_credits_field,
4899 .get_credits = smb2_get_credits,
4900 .wait_mtu_credits = smb2_wait_mtu_credits,
9a1c67e8 4901 .adjust_credits = smb2_adjust_credits,
aab1893d 4902 .get_next_mid = smb2_get_next_mid,
c781af7e 4903 .revert_current_mid = smb2_revert_current_mid,
aab1893d
SF		 4904 .read_data_offset = smb2_read_data_offset,
4905 .read_data_length = smb2_read_data_length,
4906 .map_error = map_smb2_to_linux_error,
4907 .find_mid = smb2_find_mid,
4908 .check_message = smb2_check_message,
4909 .dump_detail = smb2_dump_detail,
4910 .clear_stats = smb2_clear_stats,
4911 .print_stats = smb2_print_stats,
4912 .dump_share_caps = smb2_dump_share_caps,
4913 .is_oplock_break = smb2_is_valid_oplock_break,
38bd4906 4914 .handle_cancelled_mid = smb2_handle_cancelled_mid,
9bd45408 4915 .downgrade_oplock = smb3_downgrade_oplock,
aab1893d
SF		 4916 .need_neg = smb2_need_neg,
4917 .negotiate = smb2_negotiate,
3d621230
SF		 4918 .negotiate_wsize = smb3_negotiate_wsize,
4919 .negotiate_rsize = smb3_negotiate_rsize,
aab1893d
SF		 4920 .sess_setup = SMB2_sess_setup,
4921 .logoff = SMB2_logoff,
4922 .tree_connect = SMB2_tcon,
4923 .tree_disconnect = SMB2_tdis,
4924 .qfs_tcon = smb3_qfs_tcon,
4925 .is_path_accessible = smb2_is_path_accessible,
4926 .can_echo = smb2_can_echo,
4927 .echo = SMB2_echo,
4928 .query_path_info = smb2_query_path_info,
4929 .get_srv_inum = smb2_get_srv_inum,
4930 .query_file_info = smb2_query_file_info,
4931 .set_path_size = smb2_set_path_size,
4932 .set_file_size = smb2_set_file_size,
4933 .set_file_info = smb2_set_file_info,
4934 .set_compression = smb2_set_compression,
4935 .mkdir = smb2_mkdir,
4936 .mkdir_setinfo = smb2_mkdir_setinfo,
bea851b8 4937 .posix_mkdir = smb311_posix_mkdir,
aab1893d
SF		 4938 .rmdir = smb2_rmdir,
4939 .unlink = smb2_unlink,
4940 .rename = smb2_rename_path,
4941 .create_hardlink = smb2_create_hardlink,
4942 .query_symlink = smb2_query_symlink,
4943 .query_mf_symlink = smb3_query_mf_symlink,
4944 .create_mf_symlink = smb3_create_mf_symlink,
4945 .open = smb2_open_file,
4946 .set_fid = smb2_set_fid,
4947 .close = smb2_close_file,
43f8a6a7 4948 .close_getattr = smb2_close_getattr,
aab1893d
SF		 4949 .flush = smb2_flush_file,
4950 .async_readv = smb2_async_readv,
4951 .async_writev = smb2_async_writev,
4952 .sync_read = smb2_sync_read,
4953 .sync_write = smb2_sync_write,
4954 .query_dir_first = smb2_query_dir_first,
4955 .query_dir_next = smb2_query_dir_next,
4956 .close_dir = smb2_close_dir,
4957 .calc_smb_size = smb2_calc_size,
4958 .is_status_pending = smb2_is_status_pending,
511c54a2 4959 .is_session_expired = smb2_is_session_expired,
aab1893d 4960 .oplock_response = smb2_oplock_response,
2d304217 4961 .queryfs = smb311_queryfs,
aab1893d
SF		 4962 .mand_lock = smb2_mand_lock,
4963 .mand_unlock_range = smb2_unlock_range,
4964 .push_mand_locks = smb2_push_mandatory_locks,
4965 .get_lease_key = smb2_get_lease_key,
4966 .set_lease_key = smb2_set_lease_key,
4967 .new_lease_key = smb2_new_lease_key,
373512ec 4968 .generate_signingkey = generate_smb311signingkey,
aab1893d 4969 .calc_signature = smb3_calc_signature,
b3152e2c 4970 .set_integrity = smb3_set_integrity,
aab1893d
SF		 4971 .is_read_op = smb21_is_read_op,
4972 .set_oplock_level = smb3_set_oplock_level,
4973 .create_lease_buf = smb3_create_lease_buf,
4974 .parse_lease_buf = smb3_parse_lease_buf,
312bbc59 4975 .copychunk_range = smb2_copychunk_range,
02b16665 4976 .duplicate_extents = smb2_duplicate_extents,
aab1893d
SF		 4977/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
4978 .wp_retry_size = smb2_wp_retry_size,
4979 .dir_needs_close = smb2_dir_needs_close,
4980 .fallocate = smb3_fallocate,
834170c8 4981 .enum_snapshots = smb3_enum_snapshots,
026e93dc 4982 .init_transform_rq = smb3_init_transform_rq,
4326ed2f
PS		 4983 .is_transform_hdr = smb3_is_transform_hdr,
4984 .receive_transform = smb3_receive_transform,
9d49640a 4985 .get_dfs_refer = smb2_get_dfs_refer,
ef65aaed 4986 .select_sectype = smb2_select_sectype,
95907fea
RS		 4987#ifdef CONFIG_CIFS_XATTR
4988 .query_all_EAs = smb2_query_eas,
5517554e 4989 .set_EA = smb2_set_ea,
95907fea 4990#endif /* CIFS_XATTR */
c1777df1
RS		 4991 .get_acl = get_smb2_acl,
4992 .get_acl_by_fid = get_smb2_acl_by_fid,
4993 .set_acl = set_smb2_acl,
8ce79ec3 4994 .next_header = smb2_next_header,
f5b05d62 4995 .ioctl_query_info = smb2_ioctl_query_info,
c847dccf 4996 .make_node = smb2_make_node,
2f3ebaba 4997 .fiemap = smb3_fiemap,
dece44e3 4998 .llseek = smb3_llseek,
aab1893d 4999};
aab1893d 5000
dd446b16
SF		 5001struct smb_version_values smb20_values = {
5002 .version_string = SMB20_VERSION_STRING,
5003 .protocol_id = SMB20_PROT_ID,
5004 .req_capabilities = 0, /* MBZ */
5005 .large_lock_type = 0,
5006 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5007 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5008 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 5009 .header_size = sizeof(struct smb2_sync_hdr),
5010 .header_preamble_size = 0,
dd446b16
SF		 5011 .max_header_size = MAX_SMB2_HDR_SIZE,
5012 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5013 .lock_cmd = SMB2_LOCK,
5014 .cap_unix = 0,
5015 .cap_nt_find = SMB2_NT_FIND,
5016 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 5017 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5018 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 5019 .create_lease_size = sizeof(struct create_lease),
dd446b16
SF		 5020};
5021
1080ef75
SF		 5022struct smb_version_values smb21_values = {
5023 .version_string = SMB21_VERSION_STRING,
e4aa25e7
SF		 5024 .protocol_id = SMB21_PROT_ID,
5025 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5026 .large_lock_type = 0,
5027 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5028 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5029 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 5030 .header_size = sizeof(struct smb2_sync_hdr),
5031 .header_preamble_size = 0,
e4aa25e7
SF		 5032 .max_header_size = MAX_SMB2_HDR_SIZE,
5033 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5034 .lock_cmd = SMB2_LOCK,
5035 .cap_unix = 0,
5036 .cap_nt_find = SMB2_NT_FIND,
5037 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 5038 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5039 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
a41a28bd 5040 .create_lease_size = sizeof(struct create_lease),
e4aa25e7
SF		 5041};
5042
9764c02f
SF		 5043struct smb_version_values smb3any_values = {
5044 .version_string = SMB3ANY_VERSION_STRING,
5045 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
f8015683 5046 .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		 5047 .large_lock_type = 0,
5048 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5049 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5050 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 5051 .header_size = sizeof(struct smb2_sync_hdr),
5052 .header_preamble_size = 0,
9764c02f
SF		 5053 .max_header_size = MAX_SMB2_HDR_SIZE,
5054 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5055 .lock_cmd = SMB2_LOCK,
5056 .cap_unix = 0,
5057 .cap_nt_find = SMB2_NT_FIND,
5058 .cap_large_files = SMB2_LARGE_FILES,
5059 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5060 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5061 .create_lease_size = sizeof(struct create_lease_v2),
5062};
5063
5064struct smb_version_values smbdefault_values = {
5065 .version_string = SMBDEFAULT_VERSION_STRING,
5066 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
f8015683 5067 .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		 5068 .large_lock_type = 0,
5069 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5070 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5071 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 5072 .header_size = sizeof(struct smb2_sync_hdr),
5073 .header_preamble_size = 0,
9764c02f
SF		 5074 .max_header_size = MAX_SMB2_HDR_SIZE,
5075 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5076 .lock_cmd = SMB2_LOCK,
5077 .cap_unix = 0,
5078 .cap_nt_find = SMB2_NT_FIND,
5079 .cap_large_files = SMB2_LARGE_FILES,
5080 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5081 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5082 .create_lease_size = sizeof(struct create_lease_v2),
5083};
5084
e4aa25e7
SF		 5085struct smb_version_values smb30_values = {
5086 .version_string = SMB30_VERSION_STRING,
5087 .protocol_id = SMB30_PROT_ID,
f8015683 5088 .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		 5089 .large_lock_type = 0,
5090 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5091 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5092 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 5093 .header_size = sizeof(struct smb2_sync_hdr),
5094 .header_preamble_size = 0,
093b2bda 5095 .max_header_size = MAX_SMB2_HDR_SIZE,
09a4707e 5096 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
2dc7e1c0 5097 .lock_cmd = SMB2_LOCK,
29e20f9c
PS		 5098 .cap_unix = 0,
5099 .cap_nt_find = SMB2_NT_FIND,
5100 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 5101 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5102 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 5103 .create_lease_size = sizeof(struct create_lease_v2),
1080ef75 5104};
20b6d8b4
SF		 5105
5106struct smb_version_values smb302_values = {
5107 .version_string = SMB302_VERSION_STRING,
5108 .protocol_id = SMB302_PROT_ID,
f8015683 5109 .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		 5110 .large_lock_type = 0,
5111 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5112 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5113 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 5114 .header_size = sizeof(struct smb2_sync_hdr),
5115 .header_preamble_size = 0,
20b6d8b4
SF		 5116 .max_header_size = MAX_SMB2_HDR_SIZE,
5117 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5118 .lock_cmd = SMB2_LOCK,
5119 .cap_unix = 0,
5120 .cap_nt_find = SMB2_NT_FIND,
5121 .cap_large_files = SMB2_LARGE_FILES,
50285882
JL		 5122 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5123 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
f047390a 5124 .create_lease_size = sizeof(struct create_lease_v2),
20b6d8b4 5125};
5f7fbf73 5126
5f7fbf73
SF		 5127struct smb_version_values smb311_values = {
5128 .version_string = SMB311_VERSION_STRING,
5129 .protocol_id = SMB311_PROT_ID,
f8015683 5130 .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		 5131 .large_lock_type = 0,
5132 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5133 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5134 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
977b6170
RS		 5135 .header_size = sizeof(struct smb2_sync_hdr),
5136 .header_preamble_size = 0,
5f7fbf73
SF		 5137 .max_header_size = MAX_SMB2_HDR_SIZE,
5138 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5139 .lock_cmd = SMB2_LOCK,
5140 .cap_unix = 0,
5141 .cap_nt_find = SMB2_NT_FIND,
5142 .cap_large_files = SMB2_LARGE_FILES,
5143 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5144 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5145 .create_lease_size = sizeof(struct create_lease_v2),
5146};
Ubuntu Hirsute Linux kernel mirror