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usb: typec: intel_pmc_mux: Add support for USB4
[linux/fpc-iii.git] / fs / cifs / smb2ops.c
blobd9fdafa5eb601123a00a6b5c7c3eb6c42a84fbff
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * SMB2 version specific operations
4 *
5 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
6 */
7
8 #include <linux/pagemap.h>
9 #include <linux/vfs.h>
10 #include <linux/falloc.h>
11 #include <linux/scatterlist.h>
12 #include <linux/uuid.h>
13 #include <linux/sort.h>
14 #include <crypto/aead.h>
15 #include <linux/fiemap.h>
16 #include "cifsfs.h"
17 #include "cifsglob.h"
18 #include "smb2pdu.h"
19 #include "smb2proto.h"
20 #include "cifsproto.h"
21 #include "cifs_debug.h"
22 #include "cifs_unicode.h"
23 #include "smb2status.h"
24 #include "smb2glob.h"
25 #include "cifs_ioctl.h"
26 #include "smbdirect.h"
27
28 /* Change credits for different ops and return the total number of credits */
29 static int
30 change_conf(struct TCP_Server_Info *server)
31 {
32 server->credits += server->echo_credits + server->oplock_credits;
33 server->oplock_credits = server->echo_credits = 0;
34 switch (server->credits) {
35 case 0:
36 return 0;
37 case 1:
38 server->echoes = false;
39 server->oplocks = false;
40 break;
41 case 2:
42 server->echoes = true;
43 server->oplocks = false;
44 server->echo_credits = 1;
45 break;
46 default:
47 server->echoes = true;
48 if (enable_oplocks) {
49 server->oplocks = true;
50 server->oplock_credits = 1;
51 } else
52 server->oplocks = false;
53
54 server->echo_credits = 1;
55 }
56 server->credits -= server->echo_credits + server->oplock_credits;
57 return server->credits + server->echo_credits + server->oplock_credits;
58 }
59
60 static void
61 smb2_add_credits(struct TCP_Server_Info *server,
62 const struct cifs_credits *credits, const int optype)
63 {
64 int *val, rc = -1;
65 unsigned int add = credits->value;
66 unsigned int instance = credits->instance;
67 bool reconnect_detected = false;
68
69 spin_lock(&server->req_lock);
70 val = server->ops->get_credits_field(server, optype);
71
72 /* eg found case where write overlapping reconnect messed up credits */
73 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
74 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
75 server->hostname, *val);
76 if ((instance == 0) || (instance == server->reconnect_instance))
77 *val += add;
78 else
79 reconnect_detected = true;
80
81 if (*val > 65000) {
82 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
83 pr_warn_once("server overflowed SMB3 credits\n");
84 }
85 server->in_flight--;
86 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
87 rc = change_conf(server);
88 /*
89 * Sometimes server returns 0 credits on oplock break ack - we need to
90 * rebalance credits in this case.
91 */
92 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
93 server->oplocks) {
94 if (server->credits > 1) {
95 server->credits--;
96 server->oplock_credits++;
97 }
98 }
99 spin_unlock(&server->req_lock);
100 wake_up(&server->request_q);
101
102 if (reconnect_detected)
103 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
104 add, instance);
105
106 if (server->tcpStatus == CifsNeedReconnect
107 || server->tcpStatus == CifsExiting)
108 return;
109
110 switch (rc) {
111 case -1:
112 /* change_conf hasn't been executed */
113 break;
114 case 0:
115 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
116 break;
117 case 1:
118 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
119 break;
120 case 2:
121 cifs_dbg(FYI, "disabling oplocks\n");
122 break;
123 default:
124 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
125 }
126 }
127
128 static void
129 smb2_set_credits(struct TCP_Server_Info *server, const int val)
130 {
131 spin_lock(&server->req_lock);
132 server->credits = val;
133 if (val == 1)
134 server->reconnect_instance++;
135 spin_unlock(&server->req_lock);
136 /* don't log while holding the lock */
137 if (val == 1)
138 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
139 }
140
141 static int *
142 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
143 {
144 switch (optype) {
145 case CIFS_ECHO_OP:
146 return &server->echo_credits;
147 case CIFS_OBREAK_OP:
148 return &server->oplock_credits;
149 default:
150 return &server->credits;
151 }
152 }
153
154 static unsigned int
155 smb2_get_credits(struct mid_q_entry *mid)
156 {
157 return mid->credits_received;
158 }
159
160 static int
161 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
162 unsigned int *num, struct cifs_credits *credits)
163 {
164 int rc = 0;
165 unsigned int scredits;
166
167 spin_lock(&server->req_lock);
168 while (1) {
169 if (server->credits <= 0) {
170 spin_unlock(&server->req_lock);
171 cifs_num_waiters_inc(server);
172 rc = wait_event_killable(server->request_q,
173 has_credits(server, &server->credits, 1));
174 cifs_num_waiters_dec(server);
175 if (rc)
176 return rc;
177 spin_lock(&server->req_lock);
178 } else {
179 if (server->tcpStatus == CifsExiting) {
180 spin_unlock(&server->req_lock);
181 return -ENOENT;
182 }
183
184 scredits = server->credits;
185 /* can deadlock with reopen */
186 if (scredits <= 8) {
187 *num = SMB2_MAX_BUFFER_SIZE;
188 credits->value = 0;
189 credits->instance = 0;
190 break;
191 }
192
193 /* leave some credits for reopen and other ops */
194 scredits -= 8;
195 *num = min_t(unsigned int, size,
196 scredits * SMB2_MAX_BUFFER_SIZE);
197
198 credits->value =
199 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
200 credits->instance = server->reconnect_instance;
201 server->credits -= credits->value;
202 server->in_flight++;
203 if (server->in_flight > server->max_in_flight)
204 server->max_in_flight = server->in_flight;
205 break;
206 }
207 }
208 spin_unlock(&server->req_lock);
209 return rc;
210 }
211
212 static int
213 smb2_adjust_credits(struct TCP_Server_Info *server,
214 struct cifs_credits *credits,
215 const unsigned int payload_size)
216 {
217 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
218
219 if (!credits->value || credits->value == new_val)
220 return 0;
221
222 if (credits->value < new_val) {
223 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
224 credits->value, new_val);
225 return -ENOTSUPP;
226 }
227
228 spin_lock(&server->req_lock);
229
230 if (server->reconnect_instance != credits->instance) {
231 spin_unlock(&server->req_lock);
232 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
233 credits->value - new_val);
234 return -EAGAIN;
235 }
236
237 server->credits += credits->value - new_val;
238 spin_unlock(&server->req_lock);
239 wake_up(&server->request_q);
240 credits->value = new_val;
241 return 0;
242 }
243
244 static __u64
245 smb2_get_next_mid(struct TCP_Server_Info *server)
246 {
247 __u64 mid;
248 /* for SMB2 we need the current value */
249 spin_lock(&GlobalMid_Lock);
250 mid = server->CurrentMid++;
251 spin_unlock(&GlobalMid_Lock);
252 return mid;
253 }
254
255 static void
256 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
257 {
258 spin_lock(&GlobalMid_Lock);
259 if (server->CurrentMid >= val)
260 server->CurrentMid -= val;
261 spin_unlock(&GlobalMid_Lock);
262 }
263
264 static struct mid_q_entry *
265 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
266 {
267 struct mid_q_entry *mid;
268 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
269 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
270
271 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
272 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
273 return NULL;
274 }
275
276 spin_lock(&GlobalMid_Lock);
277 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
278 if ((mid->mid == wire_mid) &&
279 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
280 (mid->command == shdr->Command)) {
281 kref_get(&mid->refcount);
282 spin_unlock(&GlobalMid_Lock);
283 return mid;
284 }
285 }
286 spin_unlock(&GlobalMid_Lock);
287 return NULL;
288 }
289
290 static void
291 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
292 {
293 #ifdef CONFIG_CIFS_DEBUG2
294 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
295
296 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
297 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
298 shdr->ProcessId);
299 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
300 server->ops->calc_smb_size(buf, server));
301 #endif
302 }
303
304 static bool
305 smb2_need_neg(struct TCP_Server_Info *server)
306 {
307 return server->max_read == 0;
308 }
309
310 static int
311 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
312 {
313 int rc;
314
315 cifs_ses_server(ses)->CurrentMid = 0;
316 rc = SMB2_negotiate(xid, ses);
317 /* BB we probably don't need to retry with modern servers */
318 if (rc == -EAGAIN)
319 rc = -EHOSTDOWN;
320 return rc;
321 }
322
323 static unsigned int
324 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
325 {
326 struct TCP_Server_Info *server = tcon->ses->server;
327 unsigned int wsize;
328
329 /* start with specified wsize, or default */
330 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
331 wsize = min_t(unsigned int, wsize, server->max_write);
332 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
333 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
334
335 return wsize;
336 }
337
338 static unsigned int
339 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
340 {
341 struct TCP_Server_Info *server = tcon->ses->server;
342 unsigned int wsize;
343
344 /* start with specified wsize, or default */
345 wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
346 wsize = min_t(unsigned int, wsize, server->max_write);
347 #ifdef CONFIG_CIFS_SMB_DIRECT
348 if (server->rdma) {
349 if (server->sign)
350 /*
351 * Account for SMB2 data transfer packet header and
352 * possible encryption header
353 */
354 wsize = min_t(unsigned int,
355 wsize,
356 server->smbd_conn->max_fragmented_send_size -
357 SMB2_READWRITE_PDU_HEADER_SIZE -
358 sizeof(struct smb2_transform_hdr));
359 else
360 wsize = min_t(unsigned int,
361 wsize, server->smbd_conn->max_readwrite_size);
362 }
363 #endif
364 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
365 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
366
367 return wsize;
368 }
369
370 static unsigned int
371 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
372 {
373 struct TCP_Server_Info *server = tcon->ses->server;
374 unsigned int rsize;
375
376 /* start with specified rsize, or default */
377 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
378 rsize = min_t(unsigned int, rsize, server->max_read);
379
380 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
381 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
382
383 return rsize;
384 }
385
386 static unsigned int
387 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
388 {
389 struct TCP_Server_Info *server = tcon->ses->server;
390 unsigned int rsize;
391
392 /* start with specified rsize, or default */
393 rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
394 rsize = min_t(unsigned int, rsize, server->max_read);
395 #ifdef CONFIG_CIFS_SMB_DIRECT
396 if (server->rdma) {
397 if (server->sign)
398 /*
399 * Account for SMB2 data transfer packet header and
400 * possible encryption header
401 */
402 rsize = min_t(unsigned int,
403 rsize,
404 server->smbd_conn->max_fragmented_recv_size -
405 SMB2_READWRITE_PDU_HEADER_SIZE -
406 sizeof(struct smb2_transform_hdr));
407 else
408 rsize = min_t(unsigned int,
409 rsize, server->smbd_conn->max_readwrite_size);
410 }
411 #endif
412
413 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
414 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
415
416 return rsize;
417 }
418
419 static int
420 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
421 size_t buf_len,
422 struct cifs_server_iface **iface_list,
423 size_t *iface_count)
424 {
425 struct network_interface_info_ioctl_rsp *p;
426 struct sockaddr_in *addr4;
427 struct sockaddr_in6 *addr6;
428 struct iface_info_ipv4 *p4;
429 struct iface_info_ipv6 *p6;
430 struct cifs_server_iface *info;
431 ssize_t bytes_left;
432 size_t next = 0;
433 int nb_iface = 0;
434 int rc = 0;
435
436 *iface_list = NULL;
437 *iface_count = 0;
438
439 /*
440 * Fist pass: count and sanity check
441 */
442
443 bytes_left = buf_len;
444 p = buf;
445 while (bytes_left >= sizeof(*p)) {
446 nb_iface++;
447 next = le32_to_cpu(p->Next);
448 if (!next) {
449 bytes_left -= sizeof(*p);
450 break;
451 }
452 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
453 bytes_left -= next;
454 }
455
456 if (!nb_iface) {
457 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
458 rc = -EINVAL;
459 goto out;
460 }
461
462 if (bytes_left || p->Next)
463 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
464
465
466 /*
467 * Second pass: extract info to internal structure
468 */
469
470 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
471 if (!*iface_list) {
472 rc = -ENOMEM;
473 goto out;
474 }
475
476 info = *iface_list;
477 bytes_left = buf_len;
478 p = buf;
479 while (bytes_left >= sizeof(*p)) {
480 info->speed = le64_to_cpu(p->LinkSpeed);
481 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
482 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
483
484 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
485 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
486 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
487 le32_to_cpu(p->Capability));
488
489 switch (p->Family) {
490 /*
491 * The kernel and wire socket structures have the same
492 * layout and use network byte order but make the
493 * conversion explicit in case either one changes.
494 */
495 case INTERNETWORK:
496 addr4 = (struct sockaddr_in *)&info->sockaddr;
497 p4 = (struct iface_info_ipv4 *)p->Buffer;
498 addr4->sin_family = AF_INET;
499 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
500
501 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
502 addr4->sin_port = cpu_to_be16(CIFS_PORT);
503
504 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
505 &addr4->sin_addr);
506 break;
507 case INTERNETWORKV6:
508 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
509 p6 = (struct iface_info_ipv6 *)p->Buffer;
510 addr6->sin6_family = AF_INET6;
511 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
512
513 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
514 addr6->sin6_flowinfo = 0;
515 addr6->sin6_scope_id = 0;
516 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
517
518 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
519 &addr6->sin6_addr);
520 break;
521 default:
522 cifs_dbg(VFS,
523 "%s: skipping unsupported socket family\n",
524 __func__);
525 goto next_iface;
526 }
527
528 (*iface_count)++;
529 info++;
530 next_iface:
531 next = le32_to_cpu(p->Next);
532 if (!next)
533 break;
534 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
535 bytes_left -= next;
536 }
537
538 if (!*iface_count) {
539 rc = -EINVAL;
540 goto out;
541 }
542
543 out:
544 if (rc) {
545 kfree(*iface_list);
546 *iface_count = 0;
547 *iface_list = NULL;
548 }
549 return rc;
550 }
551
552 static int compare_iface(const void *ia, const void *ib)
553 {
554 const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
555 const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
556
557 return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
558 }
559
560 static int
561 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
562 {
563 int rc;
564 unsigned int ret_data_len = 0;
565 struct network_interface_info_ioctl_rsp *out_buf = NULL;
566 struct cifs_server_iface *iface_list;
567 size_t iface_count;
568 struct cifs_ses *ses = tcon->ses;
569
570 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
571 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
572 NULL /* no data input */, 0 /* no data input */,
573 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
574 if (rc == -EOPNOTSUPP) {
575 cifs_dbg(FYI,
576 "server does not support query network interfaces\n");
577 goto out;
578 } else if (rc != 0) {
579 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
580 goto out;
581 }
582
583 rc = parse_server_interfaces(out_buf, ret_data_len,
584 &iface_list, &iface_count);
585 if (rc)
586 goto out;
587
588 /* sort interfaces from fastest to slowest */
589 sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
590
591 spin_lock(&ses->iface_lock);
592 kfree(ses->iface_list);
593 ses->iface_list = iface_list;
594 ses->iface_count = iface_count;
595 ses->iface_last_update = jiffies;
596 spin_unlock(&ses->iface_lock);
597
598 out:
599 kfree(out_buf);
600 return rc;
601 }
602
603 static void
604 smb2_close_cached_fid(struct kref *ref)
605 {
606 struct cached_fid *cfid = container_of(ref, struct cached_fid,
607 refcount);
608
609 if (cfid->is_valid) {
610 cifs_dbg(FYI, "clear cached root file handle\n");
611 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
612 cfid->fid->volatile_fid);
613 cfid->is_valid = false;
614 cfid->file_all_info_is_valid = false;
615 cfid->has_lease = false;
616 }
617 }
618
619 void close_shroot(struct cached_fid *cfid)
620 {
621 mutex_lock(&cfid->fid_mutex);
622 kref_put(&cfid->refcount, smb2_close_cached_fid);
623 mutex_unlock(&cfid->fid_mutex);
624 }
625
626 void close_shroot_lease_locked(struct cached_fid *cfid)
627 {
628 if (cfid->has_lease) {
629 cfid->has_lease = false;
630 kref_put(&cfid->refcount, smb2_close_cached_fid);
631 }
632 }
633
634 void close_shroot_lease(struct cached_fid *cfid)
635 {
636 mutex_lock(&cfid->fid_mutex);
637 close_shroot_lease_locked(cfid);
638 mutex_unlock(&cfid->fid_mutex);
639 }
640
641 void
642 smb2_cached_lease_break(struct work_struct *work)
643 {
644 struct cached_fid *cfid = container_of(work,
645 struct cached_fid, lease_break);
646
647 close_shroot_lease(cfid);
648 }
649
650 /*
651 * Open the directory at the root of a share
652 */
653 int open_shroot(unsigned int xid, struct cifs_tcon *tcon,
654 struct cifs_sb_info *cifs_sb, struct cifs_fid *pfid)
655 {
656 struct cifs_ses *ses = tcon->ses;
657 struct TCP_Server_Info *server = ses->server;
658 struct cifs_open_parms oparms;
659 struct smb2_create_rsp *o_rsp = NULL;
660 struct smb2_query_info_rsp *qi_rsp = NULL;
661 int resp_buftype[2];
662 struct smb_rqst rqst[2];
663 struct kvec rsp_iov[2];
664 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
665 struct kvec qi_iov[1];
666 int rc, flags = 0;
667 __le16 utf16_path = 0; /* Null - since an open of top of share */
668 u8 oplock = SMB2_OPLOCK_LEVEL_II;
669
670 mutex_lock(&tcon->crfid.fid_mutex);
671 if (tcon->crfid.is_valid) {
672 cifs_dbg(FYI, "found a cached root file handle\n");
673 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
674 kref_get(&tcon->crfid.refcount);
675 mutex_unlock(&tcon->crfid.fid_mutex);
676 return 0;
677 }
678
679 /*
680 * We do not hold the lock for the open because in case
681 * SMB2_open needs to reconnect, it will end up calling
682 * cifs_mark_open_files_invalid() which takes the lock again
683 * thus causing a deadlock
684 */
685
686 mutex_unlock(&tcon->crfid.fid_mutex);
687
688 if (smb3_encryption_required(tcon))
689 flags |= CIFS_TRANSFORM_REQ;
690
691 if (!server->ops->new_lease_key)
692 return -EIO;
693
694 server->ops->new_lease_key(pfid);
695
696 memset(rqst, 0, sizeof(rqst));
697 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
698 memset(rsp_iov, 0, sizeof(rsp_iov));
699
700 /* Open */
701 memset(&open_iov, 0, sizeof(open_iov));
702 rqst[0].rq_iov = open_iov;
703 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
704
705 oparms.tcon = tcon;
706 oparms.create_options = cifs_create_options(cifs_sb, 0);
707 oparms.desired_access = FILE_READ_ATTRIBUTES;
708 oparms.disposition = FILE_OPEN;
709 oparms.fid = pfid;
710 oparms.reconnect = false;
711
712 rc = SMB2_open_init(tcon, server,
713 &rqst[0], &oplock, &oparms, &utf16_path);
714 if (rc)
715 goto oshr_free;
716 smb2_set_next_command(tcon, &rqst[0]);
717
718 memset(&qi_iov, 0, sizeof(qi_iov));
719 rqst[1].rq_iov = qi_iov;
720 rqst[1].rq_nvec = 1;
721
722 rc = SMB2_query_info_init(tcon, server,
723 &rqst[1], COMPOUND_FID,
724 COMPOUND_FID, FILE_ALL_INFORMATION,
725 SMB2_O_INFO_FILE, 0,
726 sizeof(struct smb2_file_all_info) +
727 PATH_MAX * 2, 0, NULL);
728 if (rc)
729 goto oshr_free;
730
731 smb2_set_related(&rqst[1]);
732
733 rc = compound_send_recv(xid, ses, server,
734 flags, 2, rqst,
735 resp_buftype, rsp_iov);
736 mutex_lock(&tcon->crfid.fid_mutex);
737
738 /*
739 * Now we need to check again as the cached root might have
740 * been successfully re-opened from a concurrent process
741 */
742
743 if (tcon->crfid.is_valid) {
744 /* work was already done */
745
746 /* stash fids for close() later */
747 struct cifs_fid fid = {
748 .persistent_fid = pfid->persistent_fid,
749 .volatile_fid = pfid->volatile_fid,
750 };
751
752 /*
753 * caller expects this func to set pfid to a valid
754 * cached root, so we copy the existing one and get a
755 * reference.
756 */
757 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
758 kref_get(&tcon->crfid.refcount);
759
760 mutex_unlock(&tcon->crfid.fid_mutex);
761
762 if (rc == 0) {
763 /* close extra handle outside of crit sec */
764 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
765 }
766 rc = 0;
767 goto oshr_free;
768 }
769
770 /* Cached root is still invalid, continue normaly */
771
772 if (rc) {
773 if (rc == -EREMCHG) {
774 tcon->need_reconnect = true;
775 pr_warn_once("server share %s deleted\n",
776 tcon->treeName);
777 }
778 goto oshr_exit;
779 }
780
781 atomic_inc(&tcon->num_remote_opens);
782
783 o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
784 oparms.fid->persistent_fid = o_rsp->PersistentFileId;
785 oparms.fid->volatile_fid = o_rsp->VolatileFileId;
786 #ifdef CONFIG_CIFS_DEBUG2
787 oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
788 #endif /* CIFS_DEBUG2 */
789
790 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
791 tcon->crfid.tcon = tcon;
792 tcon->crfid.is_valid = true;
793 kref_init(&tcon->crfid.refcount);
794
795 /* BB TBD check to see if oplock level check can be removed below */
796 if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
797 kref_get(&tcon->crfid.refcount);
798 tcon->crfid.has_lease = true;
799 smb2_parse_contexts(server, o_rsp,
800 &oparms.fid->epoch,
801 oparms.fid->lease_key, &oplock,
802 NULL, NULL);
803 } else
804 goto oshr_exit;
805
806 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
807 if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
808 goto oshr_exit;
809 if (!smb2_validate_and_copy_iov(
810 le16_to_cpu(qi_rsp->OutputBufferOffset),
811 sizeof(struct smb2_file_all_info),
812 &rsp_iov[1], sizeof(struct smb2_file_all_info),
813 (char *)&tcon->crfid.file_all_info))
814 tcon->crfid.file_all_info_is_valid = true;
815
816 oshr_exit:
817 mutex_unlock(&tcon->crfid.fid_mutex);
818 oshr_free:
819 SMB2_open_free(&rqst[0]);
820 SMB2_query_info_free(&rqst[1]);
821 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
822 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
823 return rc;
824 }
825
826 static void
827 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
828 struct cifs_sb_info *cifs_sb)
829 {
830 int rc;
831 __le16 srch_path = 0; /* Null - open root of share */
832 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
833 struct cifs_open_parms oparms;
834 struct cifs_fid fid;
835 bool no_cached_open = tcon->nohandlecache;
836
837 oparms.tcon = tcon;
838 oparms.desired_access = FILE_READ_ATTRIBUTES;
839 oparms.disposition = FILE_OPEN;
840 oparms.create_options = cifs_create_options(cifs_sb, 0);
841 oparms.fid = &fid;
842 oparms.reconnect = false;
843
844 if (no_cached_open)
845 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
846 NULL, NULL);
847 else
848 rc = open_shroot(xid, tcon, cifs_sb, &fid);
849
850 if (rc)
851 return;
852
853 SMB3_request_interfaces(xid, tcon);
854
855 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
856 FS_ATTRIBUTE_INFORMATION);
857 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
858 FS_DEVICE_INFORMATION);
859 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
860 FS_VOLUME_INFORMATION);
861 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
862 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
863 if (no_cached_open)
864 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
865 else
866 close_shroot(&tcon->crfid);
867 }
868
869 static void
870 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
871 struct cifs_sb_info *cifs_sb)
872 {
873 int rc;
874 __le16 srch_path = 0; /* Null - open root of share */
875 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
876 struct cifs_open_parms oparms;
877 struct cifs_fid fid;
878
879 oparms.tcon = tcon;
880 oparms.desired_access = FILE_READ_ATTRIBUTES;
881 oparms.disposition = FILE_OPEN;
882 oparms.create_options = cifs_create_options(cifs_sb, 0);
883 oparms.fid = &fid;
884 oparms.reconnect = false;
885
886 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
887 NULL, NULL);
888 if (rc)
889 return;
890
891 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
892 FS_ATTRIBUTE_INFORMATION);
893 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
894 FS_DEVICE_INFORMATION);
895 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
896 }
897
898 static int
899 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
900 struct cifs_sb_info *cifs_sb, const char *full_path)
901 {
902 int rc;
903 __le16 *utf16_path;
904 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
905 struct cifs_open_parms oparms;
906 struct cifs_fid fid;
907
908 if ((*full_path == 0) && tcon->crfid.is_valid)
909 return 0;
910
911 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
912 if (!utf16_path)
913 return -ENOMEM;
914
915 oparms.tcon = tcon;
916 oparms.desired_access = FILE_READ_ATTRIBUTES;
917 oparms.disposition = FILE_OPEN;
918 oparms.create_options = cifs_create_options(cifs_sb, 0);
919 oparms.fid = &fid;
920 oparms.reconnect = false;
921
922 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
923 NULL);
924 if (rc) {
925 kfree(utf16_path);
926 return rc;
927 }
928
929 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
930 kfree(utf16_path);
931 return rc;
932 }
933
934 static int
935 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
936 struct cifs_sb_info *cifs_sb, const char *full_path,
937 u64 *uniqueid, FILE_ALL_INFO *data)
938 {
939 *uniqueid = le64_to_cpu(data->IndexNumber);
940 return 0;
941 }
942
943 static int
944 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
945 struct cifs_fid *fid, FILE_ALL_INFO *data)
946 {
947 int rc;
948 struct smb2_file_all_info *smb2_data;
949
950 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
951 GFP_KERNEL);
952 if (smb2_data == NULL)
953 return -ENOMEM;
954
955 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
956 smb2_data);
957 if (!rc)
958 move_smb2_info_to_cifs(data, smb2_data);
959 kfree(smb2_data);
960 return rc;
961 }
962
963 #ifdef CONFIG_CIFS_XATTR
964 static ssize_t
965 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
966 struct smb2_file_full_ea_info *src, size_t src_size,
967 const unsigned char *ea_name)
968 {
969 int rc = 0;
970 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
971 char *name, *value;
972 size_t buf_size = dst_size;
973 size_t name_len, value_len, user_name_len;
974
975 while (src_size > 0) {
976 name = &src->ea_data[0];
977 name_len = (size_t)src->ea_name_length;
978 value = &src->ea_data[src->ea_name_length + 1];
979 value_len = (size_t)le16_to_cpu(src->ea_value_length);
980
981 if (name_len == 0)
982 break;
983
984 if (src_size < 8 + name_len + 1 + value_len) {
985 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
986 rc = -EIO;
987 goto out;
988 }
989
990 if (ea_name) {
991 if (ea_name_len == name_len &&
992 memcmp(ea_name, name, name_len) == 0) {
993 rc = value_len;
994 if (dst_size == 0)
995 goto out;
996 if (dst_size < value_len) {
997 rc = -ERANGE;
998 goto out;
999 }
1000 memcpy(dst, value, value_len);
1001 goto out;
1002 }
1003 } else {
1004 /* 'user.' plus a terminating null */
1005 user_name_len = 5 + 1 + name_len;
1006
1007 if (buf_size == 0) {
1008 /* skip copy - calc size only */
1009 rc += user_name_len;
1010 } else if (dst_size >= user_name_len) {
1011 dst_size -= user_name_len;
1012 memcpy(dst, "user.", 5);
1013 dst += 5;
1014 memcpy(dst, src->ea_data, name_len);
1015 dst += name_len;
1016 *dst = 0;
1017 ++dst;
1018 rc += user_name_len;
1019 } else {
1020 /* stop before overrun buffer */
1021 rc = -ERANGE;
1022 break;
1023 }
1024 }
1025
1026 if (!src->next_entry_offset)
1027 break;
1028
1029 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1030 /* stop before overrun buffer */
1031 rc = -ERANGE;
1032 break;
1033 }
1034 src_size -= le32_to_cpu(src->next_entry_offset);
1035 src = (void *)((char *)src +
1036 le32_to_cpu(src->next_entry_offset));
1037 }
1038
1039 /* didn't find the named attribute */
1040 if (ea_name)
1041 rc = -ENODATA;
1042
1043 out:
1044 return (ssize_t)rc;
1045 }
1046
1047 static ssize_t
1048 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1049 const unsigned char *path, const unsigned char *ea_name,
1050 char *ea_data, size_t buf_size,
1051 struct cifs_sb_info *cifs_sb)
1052 {
1053 int rc;
1054 __le16 *utf16_path;
1055 struct kvec rsp_iov = {NULL, 0};
1056 int buftype = CIFS_NO_BUFFER;
1057 struct smb2_query_info_rsp *rsp;
1058 struct smb2_file_full_ea_info *info = NULL;
1059
1060 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1061 if (!utf16_path)
1062 return -ENOMEM;
1063
1064 rc = smb2_query_info_compound(xid, tcon, utf16_path,
1065 FILE_READ_EA,
1066 FILE_FULL_EA_INFORMATION,
1067 SMB2_O_INFO_FILE,
1068 CIFSMaxBufSize -
1069 MAX_SMB2_CREATE_RESPONSE_SIZE -
1070 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1071 &rsp_iov, &buftype, cifs_sb);
1072 if (rc) {
1073 /*
1074 * If ea_name is NULL (listxattr) and there are no EAs,
1075 * return 0 as it's not an error. Otherwise, the specified
1076 * ea_name was not found.
1077 */
1078 if (!ea_name && rc == -ENODATA)
1079 rc = 0;
1080 goto qeas_exit;
1081 }
1082
1083 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1084 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1085 le32_to_cpu(rsp->OutputBufferLength),
1086 &rsp_iov,
1087 sizeof(struct smb2_file_full_ea_info));
1088 if (rc)
1089 goto qeas_exit;
1090
1091 info = (struct smb2_file_full_ea_info *)(
1092 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1093 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1094 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1095
1096 qeas_exit:
1097 kfree(utf16_path);
1098 free_rsp_buf(buftype, rsp_iov.iov_base);
1099 return rc;
1100 }
1101
1102
1103 static int
1104 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1105 const char *path, const char *ea_name, const void *ea_value,
1106 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1107 struct cifs_sb_info *cifs_sb)
1108 {
1109 struct cifs_ses *ses = tcon->ses;
1110 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1111 __le16 *utf16_path = NULL;
1112 int ea_name_len = strlen(ea_name);
1113 int flags = 0;
1114 int len;
1115 struct smb_rqst rqst[3];
1116 int resp_buftype[3];
1117 struct kvec rsp_iov[3];
1118 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1119 struct cifs_open_parms oparms;
1120 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1121 struct cifs_fid fid;
1122 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1123 unsigned int size[1];
1124 void *data[1];
1125 struct smb2_file_full_ea_info *ea = NULL;
1126 struct kvec close_iov[1];
1127 struct smb2_query_info_rsp *rsp;
1128 int rc, used_len = 0;
1129
1130 if (smb3_encryption_required(tcon))
1131 flags |= CIFS_TRANSFORM_REQ;
1132
1133 if (ea_name_len > 255)
1134 return -EINVAL;
1135
1136 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1137 if (!utf16_path)
1138 return -ENOMEM;
1139
1140 memset(rqst, 0, sizeof(rqst));
1141 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1142 memset(rsp_iov, 0, sizeof(rsp_iov));
1143
1144 if (ses->server->ops->query_all_EAs) {
1145 if (!ea_value) {
1146 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1147 ea_name, NULL, 0,
1148 cifs_sb);
1149 if (rc == -ENODATA)
1150 goto sea_exit;
1151 } else {
1152 /* If we are adding a attribute we should first check
1153 * if there will be enough space available to store
1154 * the new EA. If not we should not add it since we
1155 * would not be able to even read the EAs back.
1156 */
1157 rc = smb2_query_info_compound(xid, tcon, utf16_path,
1158 FILE_READ_EA,
1159 FILE_FULL_EA_INFORMATION,
1160 SMB2_O_INFO_FILE,
1161 CIFSMaxBufSize -
1162 MAX_SMB2_CREATE_RESPONSE_SIZE -
1163 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1164 &rsp_iov[1], &resp_buftype[1], cifs_sb);
1165 if (rc == 0) {
1166 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1167 used_len = le32_to_cpu(rsp->OutputBufferLength);
1168 }
1169 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1170 resp_buftype[1] = CIFS_NO_BUFFER;
1171 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1172 rc = 0;
1173
1174 /* Use a fudge factor of 256 bytes in case we collide
1175 * with a different set_EAs command.
1176 */
1177 if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1178 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1179 used_len + ea_name_len + ea_value_len + 1) {
1180 rc = -ENOSPC;
1181 goto sea_exit;
1182 }
1183 }
1184 }
1185
1186 /* Open */
1187 memset(&open_iov, 0, sizeof(open_iov));
1188 rqst[0].rq_iov = open_iov;
1189 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1190
1191 memset(&oparms, 0, sizeof(oparms));
1192 oparms.tcon = tcon;
1193 oparms.desired_access = FILE_WRITE_EA;
1194 oparms.disposition = FILE_OPEN;
1195 oparms.create_options = cifs_create_options(cifs_sb, 0);
1196 oparms.fid = &fid;
1197 oparms.reconnect = false;
1198
1199 rc = SMB2_open_init(tcon, server,
1200 &rqst[0], &oplock, &oparms, utf16_path);
1201 if (rc)
1202 goto sea_exit;
1203 smb2_set_next_command(tcon, &rqst[0]);
1204
1205
1206 /* Set Info */
1207 memset(&si_iov, 0, sizeof(si_iov));
1208 rqst[1].rq_iov = si_iov;
1209 rqst[1].rq_nvec = 1;
1210
1211 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1212 ea = kzalloc(len, GFP_KERNEL);
1213 if (ea == NULL) {
1214 rc = -ENOMEM;
1215 goto sea_exit;
1216 }
1217
1218 ea->ea_name_length = ea_name_len;
1219 ea->ea_value_length = cpu_to_le16(ea_value_len);
1220 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1221 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1222
1223 size[0] = len;
1224 data[0] = ea;
1225
1226 rc = SMB2_set_info_init(tcon, server,
1227 &rqst[1], COMPOUND_FID,
1228 COMPOUND_FID, current->tgid,
1229 FILE_FULL_EA_INFORMATION,
1230 SMB2_O_INFO_FILE, 0, data, size);
1231 smb2_set_next_command(tcon, &rqst[1]);
1232 smb2_set_related(&rqst[1]);
1233
1234
1235 /* Close */
1236 memset(&close_iov, 0, sizeof(close_iov));
1237 rqst[2].rq_iov = close_iov;
1238 rqst[2].rq_nvec = 1;
1239 rc = SMB2_close_init(tcon, server,
1240 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1241 smb2_set_related(&rqst[2]);
1242
1243 rc = compound_send_recv(xid, ses, server,
1244 flags, 3, rqst,
1245 resp_buftype, rsp_iov);
1246 /* no need to bump num_remote_opens because handle immediately closed */
1247
1248 sea_exit:
1249 kfree(ea);
1250 kfree(utf16_path);
1251 SMB2_open_free(&rqst[0]);
1252 SMB2_set_info_free(&rqst[1]);
1253 SMB2_close_free(&rqst[2]);
1254 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1255 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1256 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1257 return rc;
1258 }
1259 #endif
1260
1261 static bool
1262 smb2_can_echo(struct TCP_Server_Info *server)
1263 {
1264 return server->echoes;
1265 }
1266
1267 static void
1268 smb2_clear_stats(struct cifs_tcon *tcon)
1269 {
1270 int i;
1271
1272 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1273 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1274 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1275 }
1276 }
1277
1278 static void
1279 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1280 {
1281 seq_puts(m, "\n\tShare Capabilities:");
1282 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1283 seq_puts(m, " DFS,");
1284 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1285 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1286 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1287 seq_puts(m, " SCALEOUT,");
1288 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1289 seq_puts(m, " CLUSTER,");
1290 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1291 seq_puts(m, " ASYMMETRIC,");
1292 if (tcon->capabilities == 0)
1293 seq_puts(m, " None");
1294 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1295 seq_puts(m, " Aligned,");
1296 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1297 seq_puts(m, " Partition Aligned,");
1298 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1299 seq_puts(m, " SSD,");
1300 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1301 seq_puts(m, " TRIM-support,");
1302
1303 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1304 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1305 if (tcon->perf_sector_size)
1306 seq_printf(m, "\tOptimal sector size: 0x%x",
1307 tcon->perf_sector_size);
1308 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1309 }
1310
1311 static void
1312 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1313 {
1314 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1315 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1316
1317 /*
1318 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1319 * totals (requests sent) since those SMBs are per-session not per tcon
1320 */
1321 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1322 (long long)(tcon->bytes_read),
1323 (long long)(tcon->bytes_written));
1324 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1325 atomic_read(&tcon->num_local_opens),
1326 atomic_read(&tcon->num_remote_opens));
1327 seq_printf(m, "\nTreeConnects: %d total %d failed",
1328 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1329 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1330 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1331 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1332 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1333 seq_printf(m, "\nCreates: %d total %d failed",
1334 atomic_read(&sent[SMB2_CREATE_HE]),
1335 atomic_read(&failed[SMB2_CREATE_HE]));
1336 seq_printf(m, "\nCloses: %d total %d failed",
1337 atomic_read(&sent[SMB2_CLOSE_HE]),
1338 atomic_read(&failed[SMB2_CLOSE_HE]));
1339 seq_printf(m, "\nFlushes: %d total %d failed",
1340 atomic_read(&sent[SMB2_FLUSH_HE]),
1341 atomic_read(&failed[SMB2_FLUSH_HE]));
1342 seq_printf(m, "\nReads: %d total %d failed",
1343 atomic_read(&sent[SMB2_READ_HE]),
1344 atomic_read(&failed[SMB2_READ_HE]));
1345 seq_printf(m, "\nWrites: %d total %d failed",
1346 atomic_read(&sent[SMB2_WRITE_HE]),
1347 atomic_read(&failed[SMB2_WRITE_HE]));
1348 seq_printf(m, "\nLocks: %d total %d failed",
1349 atomic_read(&sent[SMB2_LOCK_HE]),
1350 atomic_read(&failed[SMB2_LOCK_HE]));
1351 seq_printf(m, "\nIOCTLs: %d total %d failed",
1352 atomic_read(&sent[SMB2_IOCTL_HE]),
1353 atomic_read(&failed[SMB2_IOCTL_HE]));
1354 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1355 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1356 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1357 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1358 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1359 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1360 seq_printf(m, "\nQueryInfos: %d total %d failed",
1361 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1362 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1363 seq_printf(m, "\nSetInfos: %d total %d failed",
1364 atomic_read(&sent[SMB2_SET_INFO_HE]),
1365 atomic_read(&failed[SMB2_SET_INFO_HE]));
1366 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1367 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1368 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1369 }
1370
1371 static void
1372 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1373 {
1374 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1375 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1376
1377 cfile->fid.persistent_fid = fid->persistent_fid;
1378 cfile->fid.volatile_fid = fid->volatile_fid;
1379 cfile->fid.access = fid->access;
1380 #ifdef CONFIG_CIFS_DEBUG2
1381 cfile->fid.mid = fid->mid;
1382 #endif /* CIFS_DEBUG2 */
1383 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1384 &fid->purge_cache);
1385 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1386 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1387 }
1388
1389 static void
1390 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1391 struct cifs_fid *fid)
1392 {
1393 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1394 }
1395
1396 static void
1397 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1398 struct cifsFileInfo *cfile)
1399 {
1400 struct smb2_file_network_open_info file_inf;
1401 struct inode *inode;
1402 int rc;
1403
1404 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1405 cfile->fid.volatile_fid, &file_inf);
1406 if (rc)
1407 return;
1408
1409 inode = d_inode(cfile->dentry);
1410
1411 spin_lock(&inode->i_lock);
1412 CIFS_I(inode)->time = jiffies;
1413
1414 /* Creation time should not need to be updated on close */
1415 if (file_inf.LastWriteTime)
1416 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1417 if (file_inf.ChangeTime)
1418 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1419 if (file_inf.LastAccessTime)
1420 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1421
1422 /*
1423 * i_blocks is not related to (i_size / i_blksize),
1424 * but instead 512 byte (2**9) size is required for
1425 * calculating num blocks.
1426 */
1427 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1428 inode->i_blocks =
1429 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1430
1431 /* End of file and Attributes should not have to be updated on close */
1432 spin_unlock(&inode->i_lock);
1433 }
1434
1435 static int
1436 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1437 u64 persistent_fid, u64 volatile_fid,
1438 struct copychunk_ioctl *pcchunk)
1439 {
1440 int rc;
1441 unsigned int ret_data_len;
1442 struct resume_key_req *res_key;
1443
1444 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1445 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1446 NULL, 0 /* no input */, CIFSMaxBufSize,
1447 (char **)&res_key, &ret_data_len);
1448
1449 if (rc) {
1450 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1451 goto req_res_key_exit;
1452 }
1453 if (ret_data_len < sizeof(struct resume_key_req)) {
1454 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1455 rc = -EINVAL;
1456 goto req_res_key_exit;
1457 }
1458 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1459
1460 req_res_key_exit:
1461 kfree(res_key);
1462 return rc;
1463 }
1464
1465 struct iqi_vars {
1466 struct smb_rqst rqst[3];
1467 struct kvec rsp_iov[3];
1468 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1469 struct kvec qi_iov[1];
1470 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1471 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1472 struct kvec close_iov[1];
1473 };
1474
1475 static int
1476 smb2_ioctl_query_info(const unsigned int xid,
1477 struct cifs_tcon *tcon,
1478 struct cifs_sb_info *cifs_sb,
1479 __le16 *path, int is_dir,
1480 unsigned long p)
1481 {
1482 struct iqi_vars *vars;
1483 struct smb_rqst *rqst;
1484 struct kvec *rsp_iov;
1485 struct cifs_ses *ses = tcon->ses;
1486 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1487 char __user *arg = (char __user *)p;
1488 struct smb_query_info qi;
1489 struct smb_query_info __user *pqi;
1490 int rc = 0;
1491 int flags = 0;
1492 struct smb2_query_info_rsp *qi_rsp = NULL;
1493 struct smb2_ioctl_rsp *io_rsp = NULL;
1494 void *buffer = NULL;
1495 int resp_buftype[3];
1496 struct cifs_open_parms oparms;
1497 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1498 struct cifs_fid fid;
1499 unsigned int size[2];
1500 void *data[2];
1501 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1502
1503 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1504 if (vars == NULL)
1505 return -ENOMEM;
1506 rqst = &vars->rqst[0];
1507 rsp_iov = &vars->rsp_iov[0];
1508
1509 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1510
1511 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1512 goto e_fault;
1513
1514 if (qi.output_buffer_length > 1024) {
1515 kfree(vars);
1516 return -EINVAL;
1517 }
1518
1519 if (!ses || !server) {
1520 kfree(vars);
1521 return -EIO;
1522 }
1523
1524 if (smb3_encryption_required(tcon))
1525 flags |= CIFS_TRANSFORM_REQ;
1526
1527 buffer = memdup_user(arg + sizeof(struct smb_query_info),
1528 qi.output_buffer_length);
1529 if (IS_ERR(buffer)) {
1530 kfree(vars);
1531 return PTR_ERR(buffer);
1532 }
1533
1534 /* Open */
1535 rqst[0].rq_iov = &vars->open_iov[0];
1536 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1537
1538 memset(&oparms, 0, sizeof(oparms));
1539 oparms.tcon = tcon;
1540 oparms.disposition = FILE_OPEN;
1541 oparms.create_options = cifs_create_options(cifs_sb, create_options);
1542 oparms.fid = &fid;
1543 oparms.reconnect = false;
1544
1545 if (qi.flags & PASSTHRU_FSCTL) {
1546 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1547 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1548 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1549 break;
1550 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1551 oparms.desired_access = GENERIC_ALL;
1552 break;
1553 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1554 oparms.desired_access = GENERIC_READ;
1555 break;
1556 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1557 oparms.desired_access = GENERIC_WRITE;
1558 break;
1559 }
1560 } else if (qi.flags & PASSTHRU_SET_INFO) {
1561 oparms.desired_access = GENERIC_WRITE;
1562 } else {
1563 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1564 }
1565
1566 rc = SMB2_open_init(tcon, server,
1567 &rqst[0], &oplock, &oparms, path);
1568 if (rc)
1569 goto iqinf_exit;
1570 smb2_set_next_command(tcon, &rqst[0]);
1571
1572 /* Query */
1573 if (qi.flags & PASSTHRU_FSCTL) {
1574 /* Can eventually relax perm check since server enforces too */
1575 if (!capable(CAP_SYS_ADMIN))
1576 rc = -EPERM;
1577 else {
1578 rqst[1].rq_iov = &vars->io_iov[0];
1579 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1580
1581 rc = SMB2_ioctl_init(tcon, server,
1582 &rqst[1],
1583 COMPOUND_FID, COMPOUND_FID,
1584 qi.info_type, true, buffer,
1585 qi.output_buffer_length,
1586 CIFSMaxBufSize -
1587 MAX_SMB2_CREATE_RESPONSE_SIZE -
1588 MAX_SMB2_CLOSE_RESPONSE_SIZE);
1589 }
1590 } else if (qi.flags == PASSTHRU_SET_INFO) {
1591 /* Can eventually relax perm check since server enforces too */
1592 if (!capable(CAP_SYS_ADMIN))
1593 rc = -EPERM;
1594 else {
1595 rqst[1].rq_iov = &vars->si_iov[0];
1596 rqst[1].rq_nvec = 1;
1597
1598 size[0] = 8;
1599 data[0] = buffer;
1600
1601 rc = SMB2_set_info_init(tcon, server,
1602 &rqst[1],
1603 COMPOUND_FID, COMPOUND_FID,
1604 current->tgid,
1605 FILE_END_OF_FILE_INFORMATION,
1606 SMB2_O_INFO_FILE, 0, data, size);
1607 }
1608 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1609 rqst[1].rq_iov = &vars->qi_iov[0];
1610 rqst[1].rq_nvec = 1;
1611
1612 rc = SMB2_query_info_init(tcon, server,
1613 &rqst[1], COMPOUND_FID,
1614 COMPOUND_FID, qi.file_info_class,
1615 qi.info_type, qi.additional_information,
1616 qi.input_buffer_length,
1617 qi.output_buffer_length, buffer);
1618 } else { /* unknown flags */
1619 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1620 qi.flags);
1621 rc = -EINVAL;
1622 }
1623
1624 if (rc)
1625 goto iqinf_exit;
1626 smb2_set_next_command(tcon, &rqst[1]);
1627 smb2_set_related(&rqst[1]);
1628
1629 /* Close */
1630 rqst[2].rq_iov = &vars->close_iov[0];
1631 rqst[2].rq_nvec = 1;
1632
1633 rc = SMB2_close_init(tcon, server,
1634 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1635 if (rc)
1636 goto iqinf_exit;
1637 smb2_set_related(&rqst[2]);
1638
1639 rc = compound_send_recv(xid, ses, server,
1640 flags, 3, rqst,
1641 resp_buftype, rsp_iov);
1642 if (rc)
1643 goto iqinf_exit;
1644
1645 /* No need to bump num_remote_opens since handle immediately closed */
1646 if (qi.flags & PASSTHRU_FSCTL) {
1647 pqi = (struct smb_query_info __user *)arg;
1648 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1649 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1650 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1651 if (qi.input_buffer_length > 0 &&
1652 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1653 > rsp_iov[1].iov_len)
1654 goto e_fault;
1655
1656 if (copy_to_user(&pqi->input_buffer_length,
1657 &qi.input_buffer_length,
1658 sizeof(qi.input_buffer_length)))
1659 goto e_fault;
1660
1661 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1662 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1663 qi.input_buffer_length))
1664 goto e_fault;
1665 } else {
1666 pqi = (struct smb_query_info __user *)arg;
1667 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1668 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1669 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1670 if (copy_to_user(&pqi->input_buffer_length,
1671 &qi.input_buffer_length,
1672 sizeof(qi.input_buffer_length)))
1673 goto e_fault;
1674
1675 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1676 qi.input_buffer_length))
1677 goto e_fault;
1678 }
1679
1680 iqinf_exit:
1681 kfree(vars);
1682 kfree(buffer);
1683 SMB2_open_free(&rqst[0]);
1684 if (qi.flags & PASSTHRU_FSCTL)
1685 SMB2_ioctl_free(&rqst[1]);
1686 else
1687 SMB2_query_info_free(&rqst[1]);
1688
1689 SMB2_close_free(&rqst[2]);
1690 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1691 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1692 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1693 return rc;
1694
1695 e_fault:
1696 rc = -EFAULT;
1697 goto iqinf_exit;
1698 }
1699
1700 static ssize_t
1701 smb2_copychunk_range(const unsigned int xid,
1702 struct cifsFileInfo *srcfile,
1703 struct cifsFileInfo *trgtfile, u64 src_off,
1704 u64 len, u64 dest_off)
1705 {
1706 int rc;
1707 unsigned int ret_data_len;
1708 struct copychunk_ioctl *pcchunk;
1709 struct copychunk_ioctl_rsp *retbuf = NULL;
1710 struct cifs_tcon *tcon;
1711 int chunks_copied = 0;
1712 bool chunk_sizes_updated = false;
1713 ssize_t bytes_written, total_bytes_written = 0;
1714
1715 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1716
1717 if (pcchunk == NULL)
1718 return -ENOMEM;
1719
1720 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1721 /* Request a key from the server to identify the source of the copy */
1722 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1723 srcfile->fid.persistent_fid,
1724 srcfile->fid.volatile_fid, pcchunk);
1725
1726 /* Note: request_res_key sets res_key null only if rc !=0 */
1727 if (rc)
1728 goto cchunk_out;
1729
1730 /* For now array only one chunk long, will make more flexible later */
1731 pcchunk->ChunkCount = cpu_to_le32(1);
1732 pcchunk->Reserved = 0;
1733 pcchunk->Reserved2 = 0;
1734
1735 tcon = tlink_tcon(trgtfile->tlink);
1736
1737 while (len > 0) {
1738 pcchunk->SourceOffset = cpu_to_le64(src_off);
1739 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1740 pcchunk->Length =
1741 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1742
1743 /* Request server copy to target from src identified by key */
1744 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1745 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1746 true /* is_fsctl */, (char *)pcchunk,
1747 sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1748 (char **)&retbuf, &ret_data_len);
1749 if (rc == 0) {
1750 if (ret_data_len !=
1751 sizeof(struct copychunk_ioctl_rsp)) {
1752 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1753 rc = -EIO;
1754 goto cchunk_out;
1755 }
1756 if (retbuf->TotalBytesWritten == 0) {
1757 cifs_dbg(FYI, "no bytes copied\n");
1758 rc = -EIO;
1759 goto cchunk_out;
1760 }
1761 /*
1762 * Check if server claimed to write more than we asked
1763 */
1764 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1765 le32_to_cpu(pcchunk->Length)) {
1766 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1767 rc = -EIO;
1768 goto cchunk_out;
1769 }
1770 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1771 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1772 rc = -EIO;
1773 goto cchunk_out;
1774 }
1775 chunks_copied++;
1776
1777 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1778 src_off += bytes_written;
1779 dest_off += bytes_written;
1780 len -= bytes_written;
1781 total_bytes_written += bytes_written;
1782
1783 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1784 le32_to_cpu(retbuf->ChunksWritten),
1785 le32_to_cpu(retbuf->ChunkBytesWritten),
1786 bytes_written);
1787 } else if (rc == -EINVAL) {
1788 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1789 goto cchunk_out;
1790
1791 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1792 le32_to_cpu(retbuf->ChunksWritten),
1793 le32_to_cpu(retbuf->ChunkBytesWritten),
1794 le32_to_cpu(retbuf->TotalBytesWritten));
1795
1796 /*
1797 * Check if this is the first request using these sizes,
1798 * (ie check if copy succeed once with original sizes
1799 * and check if the server gave us different sizes after
1800 * we already updated max sizes on previous request).
1801 * if not then why is the server returning an error now
1802 */
1803 if ((chunks_copied != 0) || chunk_sizes_updated)
1804 goto cchunk_out;
1805
1806 /* Check that server is not asking us to grow size */
1807 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1808 tcon->max_bytes_chunk)
1809 tcon->max_bytes_chunk =
1810 le32_to_cpu(retbuf->ChunkBytesWritten);
1811 else
1812 goto cchunk_out; /* server gave us bogus size */
1813
1814 /* No need to change MaxChunks since already set to 1 */
1815 chunk_sizes_updated = true;
1816 } else
1817 goto cchunk_out;
1818 }
1819
1820 cchunk_out:
1821 kfree(pcchunk);
1822 kfree(retbuf);
1823 if (rc)
1824 return rc;
1825 else
1826 return total_bytes_written;
1827 }
1828
1829 static int
1830 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1831 struct cifs_fid *fid)
1832 {
1833 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1834 }
1835
1836 static unsigned int
1837 smb2_read_data_offset(char *buf)
1838 {
1839 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1840
1841 return rsp->DataOffset;
1842 }
1843
1844 static unsigned int
1845 smb2_read_data_length(char *buf, bool in_remaining)
1846 {
1847 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1848
1849 if (in_remaining)
1850 return le32_to_cpu(rsp->DataRemaining);
1851
1852 return le32_to_cpu(rsp->DataLength);
1853 }
1854
1855
1856 static int
1857 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1858 struct cifs_io_parms *parms, unsigned int *bytes_read,
1859 char **buf, int *buf_type)
1860 {
1861 parms->persistent_fid = pfid->persistent_fid;
1862 parms->volatile_fid = pfid->volatile_fid;
1863 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1864 }
1865
1866 static int
1867 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1868 struct cifs_io_parms *parms, unsigned int *written,
1869 struct kvec *iov, unsigned long nr_segs)
1870 {
1871
1872 parms->persistent_fid = pfid->persistent_fid;
1873 parms->volatile_fid = pfid->volatile_fid;
1874 return SMB2_write(xid, parms, written, iov, nr_segs);
1875 }
1876
1877 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1878 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1879 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1880 {
1881 struct cifsInodeInfo *cifsi;
1882 int rc;
1883
1884 cifsi = CIFS_I(inode);
1885
1886 /* if file already sparse don't bother setting sparse again */
1887 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1888 return true; /* already sparse */
1889
1890 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1891 return true; /* already not sparse */
1892
1893 /*
1894 * Can't check for sparse support on share the usual way via the
1895 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1896 * since Samba server doesn't set the flag on the share, yet
1897 * supports the set sparse FSCTL and returns sparse correctly
1898 * in the file attributes. If we fail setting sparse though we
1899 * mark that server does not support sparse files for this share
1900 * to avoid repeatedly sending the unsupported fsctl to server
1901 * if the file is repeatedly extended.
1902 */
1903 if (tcon->broken_sparse_sup)
1904 return false;
1905
1906 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1907 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1908 true /* is_fctl */,
1909 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1910 if (rc) {
1911 tcon->broken_sparse_sup = true;
1912 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1913 return false;
1914 }
1915
1916 if (setsparse)
1917 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1918 else
1919 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1920
1921 return true;
1922 }
1923
1924 static int
1925 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1926 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1927 {
1928 __le64 eof = cpu_to_le64(size);
1929 struct inode *inode;
1930
1931 /*
1932 * If extending file more than one page make sparse. Many Linux fs
1933 * make files sparse by default when extending via ftruncate
1934 */
1935 inode = d_inode(cfile->dentry);
1936
1937 if (!set_alloc && (size > inode->i_size + 8192)) {
1938 __u8 set_sparse = 1;
1939
1940 /* whether set sparse succeeds or not, extend the file */
1941 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1942 }
1943
1944 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1945 cfile->fid.volatile_fid, cfile->pid, &eof);
1946 }
1947
1948 static int
1949 smb2_duplicate_extents(const unsigned int xid,
1950 struct cifsFileInfo *srcfile,
1951 struct cifsFileInfo *trgtfile, u64 src_off,
1952 u64 len, u64 dest_off)
1953 {
1954 int rc;
1955 unsigned int ret_data_len;
1956 struct duplicate_extents_to_file dup_ext_buf;
1957 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1958
1959 /* server fileays advertise duplicate extent support with this flag */
1960 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1961 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1962 return -EOPNOTSUPP;
1963
1964 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1965 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1966 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1967 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1968 dup_ext_buf.ByteCount = cpu_to_le64(len);
1969 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1970 src_off, dest_off, len);
1971
1972 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1973 if (rc)
1974 goto duplicate_extents_out;
1975
1976 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1977 trgtfile->fid.volatile_fid,
1978 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1979 true /* is_fsctl */,
1980 (char *)&dup_ext_buf,
1981 sizeof(struct duplicate_extents_to_file),
1982 CIFSMaxBufSize, NULL,
1983 &ret_data_len);
1984
1985 if (ret_data_len > 0)
1986 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1987
1988 duplicate_extents_out:
1989 return rc;
1990 }
1991
1992 static int
1993 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1994 struct cifsFileInfo *cfile)
1995 {
1996 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1997 cfile->fid.volatile_fid);
1998 }
1999
2000 static int
2001 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2002 struct cifsFileInfo *cfile)
2003 {
2004 struct fsctl_set_integrity_information_req integr_info;
2005 unsigned int ret_data_len;
2006
2007 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2008 integr_info.Flags = 0;
2009 integr_info.Reserved = 0;
2010
2011 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2012 cfile->fid.volatile_fid,
2013 FSCTL_SET_INTEGRITY_INFORMATION,
2014 true /* is_fsctl */,
2015 (char *)&integr_info,
2016 sizeof(struct fsctl_set_integrity_information_req),
2017 CIFSMaxBufSize, NULL,
2018 &ret_data_len);
2019
2020 }
2021
2022 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2023 #define GMT_TOKEN_SIZE 50
2024
2025 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2026
2027 /*
2028 * Input buffer contains (empty) struct smb_snapshot array with size filled in
2029 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2030 */
2031 static int
2032 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2033 struct cifsFileInfo *cfile, void __user *ioc_buf)
2034 {
2035 char *retbuf = NULL;
2036 unsigned int ret_data_len = 0;
2037 int rc;
2038 u32 max_response_size;
2039 struct smb_snapshot_array snapshot_in;
2040
2041 /*
2042 * On the first query to enumerate the list of snapshots available
2043 * for this volume the buffer begins with 0 (number of snapshots
2044 * which can be returned is zero since at that point we do not know
2045 * how big the buffer needs to be). On the second query,
2046 * it (ret_data_len) is set to number of snapshots so we can
2047 * know to set the maximum response size larger (see below).
2048 */
2049 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2050 return -EFAULT;
2051
2052 /*
2053 * Note that for snapshot queries that servers like Azure expect that
2054 * the first query be minimal size (and just used to get the number/size
2055 * of previous versions) so response size must be specified as EXACTLY
2056 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2057 * of eight bytes.
2058 */
2059 if (ret_data_len == 0)
2060 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2061 else
2062 max_response_size = CIFSMaxBufSize;
2063
2064 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2065 cfile->fid.volatile_fid,
2066 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2067 true /* is_fsctl */,
2068 NULL, 0 /* no input data */, max_response_size,
2069 (char **)&retbuf,
2070 &ret_data_len);
2071 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2072 rc, ret_data_len);
2073 if (rc)
2074 return rc;
2075
2076 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2077 /* Fixup buffer */
2078 if (copy_from_user(&snapshot_in, ioc_buf,
2079 sizeof(struct smb_snapshot_array))) {
2080 rc = -EFAULT;
2081 kfree(retbuf);
2082 return rc;
2083 }
2084
2085 /*
2086 * Check for min size, ie not large enough to fit even one GMT
2087 * token (snapshot). On the first ioctl some users may pass in
2088 * smaller size (or zero) to simply get the size of the array
2089 * so the user space caller can allocate sufficient memory
2090 * and retry the ioctl again with larger array size sufficient
2091 * to hold all of the snapshot GMT tokens on the second try.
2092 */
2093 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2094 ret_data_len = sizeof(struct smb_snapshot_array);
2095
2096 /*
2097 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2098 * the snapshot array (of 50 byte GMT tokens) each
2099 * representing an available previous version of the data
2100 */
2101 if (ret_data_len > (snapshot_in.snapshot_array_size +
2102 sizeof(struct smb_snapshot_array)))
2103 ret_data_len = snapshot_in.snapshot_array_size +
2104 sizeof(struct smb_snapshot_array);
2105
2106 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2107 rc = -EFAULT;
2108 }
2109
2110 kfree(retbuf);
2111 return rc;
2112 }
2113
2114
2115
2116 static int
2117 smb3_notify(const unsigned int xid, struct file *pfile,
2118 void __user *ioc_buf)
2119 {
2120 struct smb3_notify notify;
2121 struct dentry *dentry = pfile->f_path.dentry;
2122 struct inode *inode = file_inode(pfile);
2123 struct cifs_sb_info *cifs_sb;
2124 struct cifs_open_parms oparms;
2125 struct cifs_fid fid;
2126 struct cifs_tcon *tcon;
2127 unsigned char *path = NULL;
2128 __le16 *utf16_path = NULL;
2129 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2130 int rc = 0;
2131
2132 path = build_path_from_dentry(dentry);
2133 if (path == NULL)
2134 return -ENOMEM;
2135
2136 cifs_sb = CIFS_SB(inode->i_sb);
2137
2138 utf16_path = cifs_convert_path_to_utf16(path + 1, cifs_sb);
2139 if (utf16_path == NULL) {
2140 rc = -ENOMEM;
2141 goto notify_exit;
2142 }
2143
2144 if (copy_from_user(&notify, ioc_buf, sizeof(struct smb3_notify))) {
2145 rc = -EFAULT;
2146 goto notify_exit;
2147 }
2148
2149 tcon = cifs_sb_master_tcon(cifs_sb);
2150 oparms.tcon = tcon;
2151 oparms.desired_access = FILE_READ_ATTRIBUTES;
2152 oparms.disposition = FILE_OPEN;
2153 oparms.create_options = cifs_create_options(cifs_sb, 0);
2154 oparms.fid = &fid;
2155 oparms.reconnect = false;
2156
2157 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2158 NULL);
2159 if (rc)
2160 goto notify_exit;
2161
2162 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2163 notify.watch_tree, notify.completion_filter);
2164
2165 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2166
2167 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2168
2169 notify_exit:
2170 kfree(path);
2171 kfree(utf16_path);
2172 return rc;
2173 }
2174
2175 static int
2176 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2177 const char *path, struct cifs_sb_info *cifs_sb,
2178 struct cifs_fid *fid, __u16 search_flags,
2179 struct cifs_search_info *srch_inf)
2180 {
2181 __le16 *utf16_path;
2182 struct smb_rqst rqst[2];
2183 struct kvec rsp_iov[2];
2184 int resp_buftype[2];
2185 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2186 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2187 int rc, flags = 0;
2188 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2189 struct cifs_open_parms oparms;
2190 struct smb2_query_directory_rsp *qd_rsp = NULL;
2191 struct smb2_create_rsp *op_rsp = NULL;
2192 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2193
2194 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2195 if (!utf16_path)
2196 return -ENOMEM;
2197
2198 if (smb3_encryption_required(tcon))
2199 flags |= CIFS_TRANSFORM_REQ;
2200
2201 memset(rqst, 0, sizeof(rqst));
2202 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2203 memset(rsp_iov, 0, sizeof(rsp_iov));
2204
2205 /* Open */
2206 memset(&open_iov, 0, sizeof(open_iov));
2207 rqst[0].rq_iov = open_iov;
2208 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2209
2210 oparms.tcon = tcon;
2211 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2212 oparms.disposition = FILE_OPEN;
2213 oparms.create_options = cifs_create_options(cifs_sb, 0);
2214 oparms.fid = fid;
2215 oparms.reconnect = false;
2216
2217 rc = SMB2_open_init(tcon, server,
2218 &rqst[0], &oplock, &oparms, utf16_path);
2219 if (rc)
2220 goto qdf_free;
2221 smb2_set_next_command(tcon, &rqst[0]);
2222
2223 /* Query directory */
2224 srch_inf->entries_in_buffer = 0;
2225 srch_inf->index_of_last_entry = 2;
2226
2227 memset(&qd_iov, 0, sizeof(qd_iov));
2228 rqst[1].rq_iov = qd_iov;
2229 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2230
2231 rc = SMB2_query_directory_init(xid, tcon, server,
2232 &rqst[1],
2233 COMPOUND_FID, COMPOUND_FID,
2234 0, srch_inf->info_level);
2235 if (rc)
2236 goto qdf_free;
2237
2238 smb2_set_related(&rqst[1]);
2239
2240 rc = compound_send_recv(xid, tcon->ses, server,
2241 flags, 2, rqst,
2242 resp_buftype, rsp_iov);
2243
2244 /* If the open failed there is nothing to do */
2245 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2246 if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2247 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2248 goto qdf_free;
2249 }
2250 fid->persistent_fid = op_rsp->PersistentFileId;
2251 fid->volatile_fid = op_rsp->VolatileFileId;
2252
2253 /* Anything else than ENODATA means a genuine error */
2254 if (rc && rc != -ENODATA) {
2255 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2256 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2257 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2258 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2259 goto qdf_free;
2260 }
2261
2262 atomic_inc(&tcon->num_remote_opens);
2263
2264 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2265 if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2266 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2267 tcon->tid, tcon->ses->Suid, 0, 0);
2268 srch_inf->endOfSearch = true;
2269 rc = 0;
2270 goto qdf_free;
2271 }
2272
2273 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2274 srch_inf);
2275 if (rc) {
2276 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2277 tcon->ses->Suid, 0, 0, rc);
2278 goto qdf_free;
2279 }
2280 resp_buftype[1] = CIFS_NO_BUFFER;
2281
2282 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2283 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2284
2285 qdf_free:
2286 kfree(utf16_path);
2287 SMB2_open_free(&rqst[0]);
2288 SMB2_query_directory_free(&rqst[1]);
2289 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2290 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2291 return rc;
2292 }
2293
2294 static int
2295 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2296 struct cifs_fid *fid, __u16 search_flags,
2297 struct cifs_search_info *srch_inf)
2298 {
2299 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2300 fid->volatile_fid, 0, srch_inf);
2301 }
2302
2303 static int
2304 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2305 struct cifs_fid *fid)
2306 {
2307 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2308 }
2309
2310 /*
2311 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2312 * the number of credits and return true. Otherwise - return false.
2313 */
2314 static bool
2315 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2316 {
2317 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2318
2319 if (shdr->Status != STATUS_PENDING)
2320 return false;
2321
2322 if (shdr->CreditRequest) {
2323 spin_lock(&server->req_lock);
2324 server->credits += le16_to_cpu(shdr->CreditRequest);
2325 spin_unlock(&server->req_lock);
2326 wake_up(&server->request_q);
2327 }
2328
2329 return true;
2330 }
2331
2332 static bool
2333 smb2_is_session_expired(char *buf)
2334 {
2335 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2336
2337 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2338 shdr->Status != STATUS_USER_SESSION_DELETED)
2339 return false;
2340
2341 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2342 le16_to_cpu(shdr->Command),
2343 le64_to_cpu(shdr->MessageId));
2344 cifs_dbg(FYI, "Session expired or deleted\n");
2345
2346 return true;
2347 }
2348
2349 static int
2350 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2351 struct cifsInodeInfo *cinode)
2352 {
2353 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2354 return SMB2_lease_break(0, tcon, cinode->lease_key,
2355 smb2_get_lease_state(cinode));
2356
2357 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2358 fid->volatile_fid,
2359 CIFS_CACHE_READ(cinode) ? 1 : 0);
2360 }
2361
2362 void
2363 smb2_set_related(struct smb_rqst *rqst)
2364 {
2365 struct smb2_sync_hdr *shdr;
2366
2367 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2368 if (shdr == NULL) {
2369 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2370 return;
2371 }
2372 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2373 }
2374
2375 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2376
2377 void
2378 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2379 {
2380 struct smb2_sync_hdr *shdr;
2381 struct cifs_ses *ses = tcon->ses;
2382 struct TCP_Server_Info *server = ses->server;
2383 unsigned long len = smb_rqst_len(server, rqst);
2384 int i, num_padding;
2385
2386 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2387 if (shdr == NULL) {
2388 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2389 return;
2390 }
2391
2392 /* SMB headers in a compound are 8 byte aligned. */
2393
2394 /* No padding needed */
2395 if (!(len & 7))
2396 goto finished;
2397
2398 num_padding = 8 - (len & 7);
2399 if (!smb3_encryption_required(tcon)) {
2400 /*
2401 * If we do not have encryption then we can just add an extra
2402 * iov for the padding.
2403 */
2404 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2405 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2406 rqst->rq_nvec++;
2407 len += num_padding;
2408 } else {
2409 /*
2410 * We can not add a small padding iov for the encryption case
2411 * because the encryption framework can not handle the padding
2412 * iovs.
2413 * We have to flatten this into a single buffer and add
2414 * the padding to it.
2415 */
2416 for (i = 1; i < rqst->rq_nvec; i++) {
2417 memcpy(rqst->rq_iov[0].iov_base +
2418 rqst->rq_iov[0].iov_len,
2419 rqst->rq_iov[i].iov_base,
2420 rqst->rq_iov[i].iov_len);
2421 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2422 }
2423 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2424 0, num_padding);
2425 rqst->rq_iov[0].iov_len += num_padding;
2426 len += num_padding;
2427 rqst->rq_nvec = 1;
2428 }
2429
2430 finished:
2431 shdr->NextCommand = cpu_to_le32(len);
2432 }
2433
2434 /*
2435 * Passes the query info response back to the caller on success.
2436 * Caller need to free this with free_rsp_buf().
2437 */
2438 int
2439 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2440 __le16 *utf16_path, u32 desired_access,
2441 u32 class, u32 type, u32 output_len,
2442 struct kvec *rsp, int *buftype,
2443 struct cifs_sb_info *cifs_sb)
2444 {
2445 struct cifs_ses *ses = tcon->ses;
2446 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2447 int flags = 0;
2448 struct smb_rqst rqst[3];
2449 int resp_buftype[3];
2450 struct kvec rsp_iov[3];
2451 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2452 struct kvec qi_iov[1];
2453 struct kvec close_iov[1];
2454 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2455 struct cifs_open_parms oparms;
2456 struct cifs_fid fid;
2457 int rc;
2458
2459 if (smb3_encryption_required(tcon))
2460 flags |= CIFS_TRANSFORM_REQ;
2461
2462 memset(rqst, 0, sizeof(rqst));
2463 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2464 memset(rsp_iov, 0, sizeof(rsp_iov));
2465
2466 memset(&open_iov, 0, sizeof(open_iov));
2467 rqst[0].rq_iov = open_iov;
2468 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2469
2470 oparms.tcon = tcon;
2471 oparms.desired_access = desired_access;
2472 oparms.disposition = FILE_OPEN;
2473 oparms.create_options = cifs_create_options(cifs_sb, 0);
2474 oparms.fid = &fid;
2475 oparms.reconnect = false;
2476
2477 rc = SMB2_open_init(tcon, server,
2478 &rqst[0], &oplock, &oparms, utf16_path);
2479 if (rc)
2480 goto qic_exit;
2481 smb2_set_next_command(tcon, &rqst[0]);
2482
2483 memset(&qi_iov, 0, sizeof(qi_iov));
2484 rqst[1].rq_iov = qi_iov;
2485 rqst[1].rq_nvec = 1;
2486
2487 rc = SMB2_query_info_init(tcon, server,
2488 &rqst[1], COMPOUND_FID, COMPOUND_FID,
2489 class, type, 0,
2490 output_len, 0,
2491 NULL);
2492 if (rc)
2493 goto qic_exit;
2494 smb2_set_next_command(tcon, &rqst[1]);
2495 smb2_set_related(&rqst[1]);
2496
2497 memset(&close_iov, 0, sizeof(close_iov));
2498 rqst[2].rq_iov = close_iov;
2499 rqst[2].rq_nvec = 1;
2500
2501 rc = SMB2_close_init(tcon, server,
2502 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2503 if (rc)
2504 goto qic_exit;
2505 smb2_set_related(&rqst[2]);
2506
2507 rc = compound_send_recv(xid, ses, server,
2508 flags, 3, rqst,
2509 resp_buftype, rsp_iov);
2510 if (rc) {
2511 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2512 if (rc == -EREMCHG) {
2513 tcon->need_reconnect = true;
2514 pr_warn_once("server share %s deleted\n",
2515 tcon->treeName);
2516 }
2517 goto qic_exit;
2518 }
2519 *rsp = rsp_iov[1];
2520 *buftype = resp_buftype[1];
2521
2522 qic_exit:
2523 SMB2_open_free(&rqst[0]);
2524 SMB2_query_info_free(&rqst[1]);
2525 SMB2_close_free(&rqst[2]);
2526 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2527 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2528 return rc;
2529 }
2530
2531 static int
2532 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2533 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2534 {
2535 struct smb2_query_info_rsp *rsp;
2536 struct smb2_fs_full_size_info *info = NULL;
2537 __le16 utf16_path = 0; /* Null - open root of share */
2538 struct kvec rsp_iov = {NULL, 0};
2539 int buftype = CIFS_NO_BUFFER;
2540 int rc;
2541
2542
2543 rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2544 FILE_READ_ATTRIBUTES,
2545 FS_FULL_SIZE_INFORMATION,
2546 SMB2_O_INFO_FILESYSTEM,
2547 sizeof(struct smb2_fs_full_size_info),
2548 &rsp_iov, &buftype, cifs_sb);
2549 if (rc)
2550 goto qfs_exit;
2551
2552 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2553 buf->f_type = SMB2_MAGIC_NUMBER;
2554 info = (struct smb2_fs_full_size_info *)(
2555 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2556 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2557 le32_to_cpu(rsp->OutputBufferLength),
2558 &rsp_iov,
2559 sizeof(struct smb2_fs_full_size_info));
2560 if (!rc)
2561 smb2_copy_fs_info_to_kstatfs(info, buf);
2562
2563 qfs_exit:
2564 free_rsp_buf(buftype, rsp_iov.iov_base);
2565 return rc;
2566 }
2567
2568 static int
2569 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2570 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2571 {
2572 int rc;
2573 __le16 srch_path = 0; /* Null - open root of share */
2574 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2575 struct cifs_open_parms oparms;
2576 struct cifs_fid fid;
2577
2578 if (!tcon->posix_extensions)
2579 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2580
2581 oparms.tcon = tcon;
2582 oparms.desired_access = FILE_READ_ATTRIBUTES;
2583 oparms.disposition = FILE_OPEN;
2584 oparms.create_options = cifs_create_options(cifs_sb, 0);
2585 oparms.fid = &fid;
2586 oparms.reconnect = false;
2587
2588 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2589 NULL, NULL);
2590 if (rc)
2591 return rc;
2592
2593 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2594 fid.volatile_fid, buf);
2595 buf->f_type = SMB2_MAGIC_NUMBER;
2596 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2597 return rc;
2598 }
2599
2600 static bool
2601 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2602 {
2603 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2604 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2605 }
2606
2607 static int
2608 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2609 __u64 length, __u32 type, int lock, int unlock, bool wait)
2610 {
2611 if (unlock && !lock)
2612 type = SMB2_LOCKFLAG_UNLOCK;
2613 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2614 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2615 current->tgid, length, offset, type, wait);
2616 }
2617
2618 static void
2619 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2620 {
2621 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2622 }
2623
2624 static void
2625 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2626 {
2627 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2628 }
2629
2630 static void
2631 smb2_new_lease_key(struct cifs_fid *fid)
2632 {
2633 generate_random_uuid(fid->lease_key);
2634 }
2635
2636 static int
2637 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2638 const char *search_name,
2639 struct dfs_info3_param **target_nodes,
2640 unsigned int *num_of_nodes,
2641 const struct nls_table *nls_codepage, int remap)
2642 {
2643 int rc;
2644 __le16 *utf16_path = NULL;
2645 int utf16_path_len = 0;
2646 struct cifs_tcon *tcon;
2647 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2648 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2649 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2650
2651 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2652
2653 /*
2654 * Try to use the IPC tcon, otherwise just use any
2655 */
2656 tcon = ses->tcon_ipc;
2657 if (tcon == NULL) {
2658 spin_lock(&cifs_tcp_ses_lock);
2659 tcon = list_first_entry_or_null(&ses->tcon_list,
2660 struct cifs_tcon,
2661 tcon_list);
2662 if (tcon)
2663 tcon->tc_count++;
2664 spin_unlock(&cifs_tcp_ses_lock);
2665 }
2666
2667 if (tcon == NULL) {
2668 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2669 ses);
2670 rc = -ENOTCONN;
2671 goto out;
2672 }
2673
2674 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2675 &utf16_path_len,
2676 nls_codepage, remap);
2677 if (!utf16_path) {
2678 rc = -ENOMEM;
2679 goto out;
2680 }
2681
2682 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2683 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2684 if (!dfs_req) {
2685 rc = -ENOMEM;
2686 goto out;
2687 }
2688
2689 /* Highest DFS referral version understood */
2690 dfs_req->MaxReferralLevel = DFS_VERSION;
2691
2692 /* Path to resolve in an UTF-16 null-terminated string */
2693 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2694
2695 do {
2696 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2697 FSCTL_DFS_GET_REFERRALS,
2698 true /* is_fsctl */,
2699 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2700 (char **)&dfs_rsp, &dfs_rsp_size);
2701 } while (rc == -EAGAIN);
2702
2703 if (rc) {
2704 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2705 cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2706 goto out;
2707 }
2708
2709 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2710 num_of_nodes, target_nodes,
2711 nls_codepage, remap, search_name,
2712 true /* is_unicode */);
2713 if (rc) {
2714 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2715 goto out;
2716 }
2717
2718 out:
2719 if (tcon && !tcon->ipc) {
2720 /* ipc tcons are not refcounted */
2721 spin_lock(&cifs_tcp_ses_lock);
2722 tcon->tc_count--;
2723 spin_unlock(&cifs_tcp_ses_lock);
2724 }
2725 kfree(utf16_path);
2726 kfree(dfs_req);
2727 kfree(dfs_rsp);
2728 return rc;
2729 }
2730
2731 static int
2732 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2733 u32 plen, char **target_path,
2734 struct cifs_sb_info *cifs_sb)
2735 {
2736 unsigned int len;
2737
2738 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2739 len = le16_to_cpu(symlink_buf->ReparseDataLength);
2740
2741 if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2742 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2743 le64_to_cpu(symlink_buf->InodeType));
2744 return -EOPNOTSUPP;
2745 }
2746
2747 *target_path = cifs_strndup_from_utf16(
2748 symlink_buf->PathBuffer,
2749 len, true, cifs_sb->local_nls);
2750 if (!(*target_path))
2751 return -ENOMEM;
2752
2753 convert_delimiter(*target_path, '/');
2754 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2755
2756 return 0;
2757 }
2758
2759 static int
2760 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2761 u32 plen, char **target_path,
2762 struct cifs_sb_info *cifs_sb)
2763 {
2764 unsigned int sub_len;
2765 unsigned int sub_offset;
2766
2767 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2768
2769 sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2770 sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2771 if (sub_offset + 20 > plen ||
2772 sub_offset + sub_len + 20 > plen) {
2773 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2774 return -EIO;
2775 }
2776
2777 *target_path = cifs_strndup_from_utf16(
2778 symlink_buf->PathBuffer + sub_offset,
2779 sub_len, true, cifs_sb->local_nls);
2780 if (!(*target_path))
2781 return -ENOMEM;
2782
2783 convert_delimiter(*target_path, '/');
2784 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2785
2786 return 0;
2787 }
2788
2789 static int
2790 parse_reparse_point(struct reparse_data_buffer *buf,
2791 u32 plen, char **target_path,
2792 struct cifs_sb_info *cifs_sb)
2793 {
2794 if (plen < sizeof(struct reparse_data_buffer)) {
2795 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2796 plen);
2797 return -EIO;
2798 }
2799
2800 if (plen < le16_to_cpu(buf->ReparseDataLength) +
2801 sizeof(struct reparse_data_buffer)) {
2802 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2803 plen);
2804 return -EIO;
2805 }
2806
2807 /* See MS-FSCC 2.1.2 */
2808 switch (le32_to_cpu(buf->ReparseTag)) {
2809 case IO_REPARSE_TAG_NFS:
2810 return parse_reparse_posix(
2811 (struct reparse_posix_data *)buf,
2812 plen, target_path, cifs_sb);
2813 case IO_REPARSE_TAG_SYMLINK:
2814 return parse_reparse_symlink(
2815 (struct reparse_symlink_data_buffer *)buf,
2816 plen, target_path, cifs_sb);
2817 default:
2818 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2819 le32_to_cpu(buf->ReparseTag));
2820 return -EOPNOTSUPP;
2821 }
2822 }
2823
2824 #define SMB2_SYMLINK_STRUCT_SIZE \
2825 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2826
2827 static int
2828 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2829 struct cifs_sb_info *cifs_sb, const char *full_path,
2830 char **target_path, bool is_reparse_point)
2831 {
2832 int rc;
2833 __le16 *utf16_path = NULL;
2834 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2835 struct cifs_open_parms oparms;
2836 struct cifs_fid fid;
2837 struct kvec err_iov = {NULL, 0};
2838 struct smb2_err_rsp *err_buf = NULL;
2839 struct smb2_symlink_err_rsp *symlink;
2840 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2841 unsigned int sub_len;
2842 unsigned int sub_offset;
2843 unsigned int print_len;
2844 unsigned int print_offset;
2845 int flags = 0;
2846 struct smb_rqst rqst[3];
2847 int resp_buftype[3];
2848 struct kvec rsp_iov[3];
2849 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2850 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2851 struct kvec close_iov[1];
2852 struct smb2_create_rsp *create_rsp;
2853 struct smb2_ioctl_rsp *ioctl_rsp;
2854 struct reparse_data_buffer *reparse_buf;
2855 int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2856 u32 plen;
2857
2858 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2859
2860 *target_path = NULL;
2861
2862 if (smb3_encryption_required(tcon))
2863 flags |= CIFS_TRANSFORM_REQ;
2864
2865 memset(rqst, 0, sizeof(rqst));
2866 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2867 memset(rsp_iov, 0, sizeof(rsp_iov));
2868
2869 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2870 if (!utf16_path)
2871 return -ENOMEM;
2872
2873 /* Open */
2874 memset(&open_iov, 0, sizeof(open_iov));
2875 rqst[0].rq_iov = open_iov;
2876 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2877
2878 memset(&oparms, 0, sizeof(oparms));
2879 oparms.tcon = tcon;
2880 oparms.desired_access = FILE_READ_ATTRIBUTES;
2881 oparms.disposition = FILE_OPEN;
2882 oparms.create_options = cifs_create_options(cifs_sb, create_options);
2883 oparms.fid = &fid;
2884 oparms.reconnect = false;
2885
2886 rc = SMB2_open_init(tcon, server,
2887 &rqst[0], &oplock, &oparms, utf16_path);
2888 if (rc)
2889 goto querty_exit;
2890 smb2_set_next_command(tcon, &rqst[0]);
2891
2892
2893 /* IOCTL */
2894 memset(&io_iov, 0, sizeof(io_iov));
2895 rqst[1].rq_iov = io_iov;
2896 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2897
2898 rc = SMB2_ioctl_init(tcon, server,
2899 &rqst[1], fid.persistent_fid,
2900 fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2901 true /* is_fctl */, NULL, 0,
2902 CIFSMaxBufSize -
2903 MAX_SMB2_CREATE_RESPONSE_SIZE -
2904 MAX_SMB2_CLOSE_RESPONSE_SIZE);
2905 if (rc)
2906 goto querty_exit;
2907
2908 smb2_set_next_command(tcon, &rqst[1]);
2909 smb2_set_related(&rqst[1]);
2910
2911
2912 /* Close */
2913 memset(&close_iov, 0, sizeof(close_iov));
2914 rqst[2].rq_iov = close_iov;
2915 rqst[2].rq_nvec = 1;
2916
2917 rc = SMB2_close_init(tcon, server,
2918 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2919 if (rc)
2920 goto querty_exit;
2921
2922 smb2_set_related(&rqst[2]);
2923
2924 rc = compound_send_recv(xid, tcon->ses, server,
2925 flags, 3, rqst,
2926 resp_buftype, rsp_iov);
2927
2928 create_rsp = rsp_iov[0].iov_base;
2929 if (create_rsp && create_rsp->sync_hdr.Status)
2930 err_iov = rsp_iov[0];
2931 ioctl_rsp = rsp_iov[1].iov_base;
2932
2933 /*
2934 * Open was successful and we got an ioctl response.
2935 */
2936 if ((rc == 0) && (is_reparse_point)) {
2937 /* See MS-FSCC 2.3.23 */
2938
2939 reparse_buf = (struct reparse_data_buffer *)
2940 ((char *)ioctl_rsp +
2941 le32_to_cpu(ioctl_rsp->OutputOffset));
2942 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2943
2944 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2945 rsp_iov[1].iov_len) {
2946 cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2947 plen);
2948 rc = -EIO;
2949 goto querty_exit;
2950 }
2951
2952 rc = parse_reparse_point(reparse_buf, plen, target_path,
2953 cifs_sb);
2954 goto querty_exit;
2955 }
2956
2957 if (!rc || !err_iov.iov_base) {
2958 rc = -ENOENT;
2959 goto querty_exit;
2960 }
2961
2962 err_buf = err_iov.iov_base;
2963 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2964 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2965 rc = -EINVAL;
2966 goto querty_exit;
2967 }
2968
2969 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2970 if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2971 le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2972 rc = -EINVAL;
2973 goto querty_exit;
2974 }
2975
2976 /* open must fail on symlink - reset rc */
2977 rc = 0;
2978 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2979 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2980 print_len = le16_to_cpu(symlink->PrintNameLength);
2981 print_offset = le16_to_cpu(symlink->PrintNameOffset);
2982
2983 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2984 rc = -EINVAL;
2985 goto querty_exit;
2986 }
2987
2988 if (err_iov.iov_len <
2989 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2990 rc = -EINVAL;
2991 goto querty_exit;
2992 }
2993
2994 *target_path = cifs_strndup_from_utf16(
2995 (char *)symlink->PathBuffer + sub_offset,
2996 sub_len, true, cifs_sb->local_nls);
2997 if (!(*target_path)) {
2998 rc = -ENOMEM;
2999 goto querty_exit;
3000 }
3001 convert_delimiter(*target_path, '/');
3002 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
3003
3004 querty_exit:
3005 cifs_dbg(FYI, "query symlink rc %d\n", rc);
3006 kfree(utf16_path);
3007 SMB2_open_free(&rqst[0]);
3008 SMB2_ioctl_free(&rqst[1]);
3009 SMB2_close_free(&rqst[2]);
3010 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3011 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3012 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3013 return rc;
3014 }
3015
3016 static struct cifs_ntsd *
3017 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3018 const struct cifs_fid *cifsfid, u32 *pacllen)
3019 {
3020 struct cifs_ntsd *pntsd = NULL;
3021 unsigned int xid;
3022 int rc = -EOPNOTSUPP;
3023 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3024
3025 if (IS_ERR(tlink))
3026 return ERR_CAST(tlink);
3027
3028 xid = get_xid();
3029 cifs_dbg(FYI, "trying to get acl\n");
3030
3031 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3032 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
3033 free_xid(xid);
3034
3035 cifs_put_tlink(tlink);
3036
3037 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3038 if (rc)
3039 return ERR_PTR(rc);
3040 return pntsd;
3041
3042 }
3043
3044 static struct cifs_ntsd *
3045 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3046 const char *path, u32 *pacllen)
3047 {
3048 struct cifs_ntsd *pntsd = NULL;
3049 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3050 unsigned int xid;
3051 int rc;
3052 struct cifs_tcon *tcon;
3053 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3054 struct cifs_fid fid;
3055 struct cifs_open_parms oparms;
3056 __le16 *utf16_path;
3057
3058 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3059 if (IS_ERR(tlink))
3060 return ERR_CAST(tlink);
3061
3062 tcon = tlink_tcon(tlink);
3063 xid = get_xid();
3064
3065 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3066 if (!utf16_path) {
3067 rc = -ENOMEM;
3068 free_xid(xid);
3069 return ERR_PTR(rc);
3070 }
3071
3072 oparms.tcon = tcon;
3073 oparms.desired_access = READ_CONTROL;
3074 oparms.disposition = FILE_OPEN;
3075 oparms.create_options = cifs_create_options(cifs_sb, 0);
3076 oparms.fid = &fid;
3077 oparms.reconnect = false;
3078
3079 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3080 NULL);
3081 kfree(utf16_path);
3082 if (!rc) {
3083 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3084 fid.volatile_fid, (void **)&pntsd, pacllen);
3085 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3086 }
3087
3088 cifs_put_tlink(tlink);
3089 free_xid(xid);
3090
3091 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3092 if (rc)
3093 return ERR_PTR(rc);
3094 return pntsd;
3095 }
3096
3097 static int
3098 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3099 struct inode *inode, const char *path, int aclflag)
3100 {
3101 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3102 unsigned int xid;
3103 int rc, access_flags = 0;
3104 struct cifs_tcon *tcon;
3105 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3106 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3107 struct cifs_fid fid;
3108 struct cifs_open_parms oparms;
3109 __le16 *utf16_path;
3110
3111 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3112 if (IS_ERR(tlink))
3113 return PTR_ERR(tlink);
3114
3115 tcon = tlink_tcon(tlink);
3116 xid = get_xid();
3117
3118 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
3119 access_flags = WRITE_OWNER;
3120 else
3121 access_flags = WRITE_DAC;
3122
3123 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3124 if (!utf16_path) {
3125 rc = -ENOMEM;
3126 free_xid(xid);
3127 return rc;
3128 }
3129
3130 oparms.tcon = tcon;
3131 oparms.desired_access = access_flags;
3132 oparms.create_options = cifs_create_options(cifs_sb, 0);
3133 oparms.disposition = FILE_OPEN;
3134 oparms.path = path;
3135 oparms.fid = &fid;
3136 oparms.reconnect = false;
3137
3138 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3139 NULL, NULL);
3140 kfree(utf16_path);
3141 if (!rc) {
3142 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3143 fid.volatile_fid, pnntsd, acllen, aclflag);
3144 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3145 }
3146
3147 cifs_put_tlink(tlink);
3148 free_xid(xid);
3149 return rc;
3150 }
3151
3152 /* Retrieve an ACL from the server */
3153 static struct cifs_ntsd *
3154 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3155 struct inode *inode, const char *path,
3156 u32 *pacllen)
3157 {
3158 struct cifs_ntsd *pntsd = NULL;
3159 struct cifsFileInfo *open_file = NULL;
3160
3161 if (inode)
3162 open_file = find_readable_file(CIFS_I(inode), true);
3163 if (!open_file)
3164 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3165
3166 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3167 cifsFileInfo_put(open_file);
3168 return pntsd;
3169 }
3170
3171 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3172 loff_t offset, loff_t len, bool keep_size)
3173 {
3174 struct cifs_ses *ses = tcon->ses;
3175 struct inode *inode;
3176 struct cifsInodeInfo *cifsi;
3177 struct cifsFileInfo *cfile = file->private_data;
3178 struct file_zero_data_information fsctl_buf;
3179 long rc;
3180 unsigned int xid;
3181 __le64 eof;
3182
3183 xid = get_xid();
3184
3185 inode = d_inode(cfile->dentry);
3186 cifsi = CIFS_I(inode);
3187
3188 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3189 ses->Suid, offset, len);
3190
3191 /*
3192 * We zero the range through ioctl, so we need remove the page caches
3193 * first, otherwise the data may be inconsistent with the server.
3194 */
3195 truncate_pagecache_range(inode, offset, offset + len - 1);
3196
3197 /* if file not oplocked can't be sure whether asking to extend size */
3198 if (!CIFS_CACHE_READ(cifsi))
3199 if (keep_size == false) {
3200 rc = -EOPNOTSUPP;
3201 trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3202 tcon->tid, ses->Suid, offset, len, rc);
3203 free_xid(xid);
3204 return rc;
3205 }
3206
3207 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3208
3209 fsctl_buf.FileOffset = cpu_to_le64(offset);
3210 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3211
3212 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3213 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
3214 (char *)&fsctl_buf,
3215 sizeof(struct file_zero_data_information),
3216 0, NULL, NULL);
3217 if (rc)
3218 goto zero_range_exit;
3219
3220 /*
3221 * do we also need to change the size of the file?
3222 */
3223 if (keep_size == false && i_size_read(inode) < offset + len) {
3224 eof = cpu_to_le64(offset + len);
3225 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3226 cfile->fid.volatile_fid, cfile->pid, &eof);
3227 }
3228
3229 zero_range_exit:
3230 free_xid(xid);
3231 if (rc)
3232 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3233 ses->Suid, offset, len, rc);
3234 else
3235 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3236 ses->Suid, offset, len);
3237 return rc;
3238 }
3239
3240 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3241 loff_t offset, loff_t len)
3242 {
3243 struct inode *inode;
3244 struct cifsFileInfo *cfile = file->private_data;
3245 struct file_zero_data_information fsctl_buf;
3246 long rc;
3247 unsigned int xid;
3248 __u8 set_sparse = 1;
3249
3250 xid = get_xid();
3251
3252 inode = d_inode(cfile->dentry);
3253
3254 /* Need to make file sparse, if not already, before freeing range. */
3255 /* Consider adding equivalent for compressed since it could also work */
3256 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3257 rc = -EOPNOTSUPP;
3258 free_xid(xid);
3259 return rc;
3260 }
3261
3262 /*
3263 * We implement the punch hole through ioctl, so we need remove the page
3264 * caches first, otherwise the data may be inconsistent with the server.
3265 */
3266 truncate_pagecache_range(inode, offset, offset + len - 1);
3267
3268 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3269
3270 fsctl_buf.FileOffset = cpu_to_le64(offset);
3271 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3272
3273 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3274 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3275 true /* is_fctl */, (char *)&fsctl_buf,
3276 sizeof(struct file_zero_data_information),
3277 CIFSMaxBufSize, NULL, NULL);
3278 free_xid(xid);
3279 return rc;
3280 }
3281
3282 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3283 loff_t off, loff_t len, bool keep_size)
3284 {
3285 struct inode *inode;
3286 struct cifsInodeInfo *cifsi;
3287 struct cifsFileInfo *cfile = file->private_data;
3288 long rc = -EOPNOTSUPP;
3289 unsigned int xid;
3290 __le64 eof;
3291
3292 xid = get_xid();
3293
3294 inode = d_inode(cfile->dentry);
3295 cifsi = CIFS_I(inode);
3296
3297 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3298 tcon->ses->Suid, off, len);
3299 /* if file not oplocked can't be sure whether asking to extend size */
3300 if (!CIFS_CACHE_READ(cifsi))
3301 if (keep_size == false) {
3302 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3303 tcon->tid, tcon->ses->Suid, off, len, rc);
3304 free_xid(xid);
3305 return rc;
3306 }
3307
3308 /*
3309 * Extending the file
3310 */
3311 if ((keep_size == false) && i_size_read(inode) < off + len) {
3312 rc = inode_newsize_ok(inode, off + len);
3313 if (rc)
3314 goto out;
3315
3316 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0)
3317 smb2_set_sparse(xid, tcon, cfile, inode, false);
3318
3319 eof = cpu_to_le64(off + len);
3320 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3321 cfile->fid.volatile_fid, cfile->pid, &eof);
3322 if (rc == 0) {
3323 cifsi->server_eof = off + len;
3324 cifs_setsize(inode, off + len);
3325 cifs_truncate_page(inode->i_mapping, inode->i_size);
3326 truncate_setsize(inode, off + len);
3327 }
3328 goto out;
3329 }
3330
3331 /*
3332 * Files are non-sparse by default so falloc may be a no-op
3333 * Must check if file sparse. If not sparse, and since we are not
3334 * extending then no need to do anything since file already allocated
3335 */
3336 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3337 rc = 0;
3338 goto out;
3339 }
3340
3341 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3342 /*
3343 * Check if falloc starts within first few pages of file
3344 * and ends within a few pages of the end of file to
3345 * ensure that most of file is being forced to be
3346 * fallocated now. If so then setting whole file sparse
3347 * ie potentially making a few extra pages at the beginning
3348 * or end of the file non-sparse via set_sparse is harmless.
3349 */
3350 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3351 rc = -EOPNOTSUPP;
3352 goto out;
3353 }
3354 }
3355
3356 smb2_set_sparse(xid, tcon, cfile, inode, false);
3357 rc = 0;
3358
3359 out:
3360 if (rc)
3361 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3362 tcon->ses->Suid, off, len, rc);
3363 else
3364 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3365 tcon->ses->Suid, off, len);
3366
3367 free_xid(xid);
3368 return rc;
3369 }
3370
3371 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3372 {
3373 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3374 struct cifsInodeInfo *cifsi;
3375 struct inode *inode;
3376 int rc = 0;
3377 struct file_allocated_range_buffer in_data, *out_data = NULL;
3378 u32 out_data_len;
3379 unsigned int xid;
3380
3381 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3382 return generic_file_llseek(file, offset, whence);
3383
3384 inode = d_inode(cfile->dentry);
3385 cifsi = CIFS_I(inode);
3386
3387 if (offset < 0 || offset >= i_size_read(inode))
3388 return -ENXIO;
3389
3390 xid = get_xid();
3391 /*
3392 * We need to be sure that all dirty pages are written as they
3393 * might fill holes on the server.
3394 * Note that we also MUST flush any written pages since at least
3395 * some servers (Windows2016) will not reflect recent writes in
3396 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3397 */
3398 wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3399 if (wrcfile) {
3400 filemap_write_and_wait(inode->i_mapping);
3401 smb2_flush_file(xid, tcon, &wrcfile->fid);
3402 cifsFileInfo_put(wrcfile);
3403 }
3404
3405 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3406 if (whence == SEEK_HOLE)
3407 offset = i_size_read(inode);
3408 goto lseek_exit;
3409 }
3410
3411 in_data.file_offset = cpu_to_le64(offset);
3412 in_data.length = cpu_to_le64(i_size_read(inode));
3413
3414 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3415 cfile->fid.volatile_fid,
3416 FSCTL_QUERY_ALLOCATED_RANGES, true,
3417 (char *)&in_data, sizeof(in_data),
3418 sizeof(struct file_allocated_range_buffer),
3419 (char **)&out_data, &out_data_len);
3420 if (rc == -E2BIG)
3421 rc = 0;
3422 if (rc)
3423 goto lseek_exit;
3424
3425 if (whence == SEEK_HOLE && out_data_len == 0)
3426 goto lseek_exit;
3427
3428 if (whence == SEEK_DATA && out_data_len == 0) {
3429 rc = -ENXIO;
3430 goto lseek_exit;
3431 }
3432
3433 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3434 rc = -EINVAL;
3435 goto lseek_exit;
3436 }
3437 if (whence == SEEK_DATA) {
3438 offset = le64_to_cpu(out_data->file_offset);
3439 goto lseek_exit;
3440 }
3441 if (offset < le64_to_cpu(out_data->file_offset))
3442 goto lseek_exit;
3443
3444 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3445
3446 lseek_exit:
3447 free_xid(xid);
3448 kfree(out_data);
3449 if (!rc)
3450 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3451 else
3452 return rc;
3453 }
3454
3455 static int smb3_fiemap(struct cifs_tcon *tcon,
3456 struct cifsFileInfo *cfile,
3457 struct fiemap_extent_info *fei, u64 start, u64 len)
3458 {
3459 unsigned int xid;
3460 struct file_allocated_range_buffer in_data, *out_data;
3461 u32 out_data_len;
3462 int i, num, rc, flags, last_blob;
3463 u64 next;
3464
3465 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3466 if (rc)
3467 return rc;
3468
3469 xid = get_xid();
3470 again:
3471 in_data.file_offset = cpu_to_le64(start);
3472 in_data.length = cpu_to_le64(len);
3473
3474 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3475 cfile->fid.volatile_fid,
3476 FSCTL_QUERY_ALLOCATED_RANGES, true,
3477 (char *)&in_data, sizeof(in_data),
3478 1024 * sizeof(struct file_allocated_range_buffer),
3479 (char **)&out_data, &out_data_len);
3480 if (rc == -E2BIG) {
3481 last_blob = 0;
3482 rc = 0;
3483 } else
3484 last_blob = 1;
3485 if (rc)
3486 goto out;
3487
3488 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3489 rc = -EINVAL;
3490 goto out;
3491 }
3492 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3493 rc = -EINVAL;
3494 goto out;
3495 }
3496
3497 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3498 for (i = 0; i < num; i++) {
3499 flags = 0;
3500 if (i == num - 1 && last_blob)
3501 flags |= FIEMAP_EXTENT_LAST;
3502
3503 rc = fiemap_fill_next_extent(fei,
3504 le64_to_cpu(out_data[i].file_offset),
3505 le64_to_cpu(out_data[i].file_offset),
3506 le64_to_cpu(out_data[i].length),
3507 flags);
3508 if (rc < 0)
3509 goto out;
3510 if (rc == 1) {
3511 rc = 0;
3512 goto out;
3513 }
3514 }
3515
3516 if (!last_blob) {
3517 next = le64_to_cpu(out_data[num - 1].file_offset) +
3518 le64_to_cpu(out_data[num - 1].length);
3519 len = len - (next - start);
3520 start = next;
3521 goto again;
3522 }
3523
3524 out:
3525 free_xid(xid);
3526 kfree(out_data);
3527 return rc;
3528 }
3529
3530 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3531 loff_t off, loff_t len)
3532 {
3533 /* KEEP_SIZE already checked for by do_fallocate */
3534 if (mode & FALLOC_FL_PUNCH_HOLE)
3535 return smb3_punch_hole(file, tcon, off, len);
3536 else if (mode & FALLOC_FL_ZERO_RANGE) {
3537 if (mode & FALLOC_FL_KEEP_SIZE)
3538 return smb3_zero_range(file, tcon, off, len, true);
3539 return smb3_zero_range(file, tcon, off, len, false);
3540 } else if (mode == FALLOC_FL_KEEP_SIZE)
3541 return smb3_simple_falloc(file, tcon, off, len, true);
3542 else if (mode == 0)
3543 return smb3_simple_falloc(file, tcon, off, len, false);
3544
3545 return -EOPNOTSUPP;
3546 }
3547
3548 static void
3549 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3550 struct cifsInodeInfo *cinode, __u32 oplock,
3551 unsigned int epoch, bool *purge_cache)
3552 {
3553 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3554 }
3555
3556 static void
3557 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3558 unsigned int epoch, bool *purge_cache);
3559
3560 static void
3561 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3562 struct cifsInodeInfo *cinode, __u32 oplock,
3563 unsigned int epoch, bool *purge_cache)
3564 {
3565 unsigned int old_state = cinode->oplock;
3566 unsigned int old_epoch = cinode->epoch;
3567 unsigned int new_state;
3568
3569 if (epoch > old_epoch) {
3570 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3571 cinode->epoch = epoch;
3572 }
3573
3574 new_state = cinode->oplock;
3575 *purge_cache = false;
3576
3577 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3578 (new_state & CIFS_CACHE_READ_FLG) == 0)
3579 *purge_cache = true;
3580 else if (old_state == new_state && (epoch - old_epoch > 1))
3581 *purge_cache = true;
3582 }
3583
3584 static void
3585 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3586 unsigned int epoch, bool *purge_cache)
3587 {
3588 oplock &= 0xFF;
3589 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3590 return;
3591 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3592 cinode->oplock = CIFS_CACHE_RHW_FLG;
3593 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3594 &cinode->vfs_inode);
3595 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3596 cinode->oplock = CIFS_CACHE_RW_FLG;
3597 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3598 &cinode->vfs_inode);
3599 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3600 cinode->oplock = CIFS_CACHE_READ_FLG;
3601 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3602 &cinode->vfs_inode);
3603 } else
3604 cinode->oplock = 0;
3605 }
3606
3607 static void
3608 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3609 unsigned int epoch, bool *purge_cache)
3610 {
3611 char message[5] = {0};
3612 unsigned int new_oplock = 0;
3613
3614 oplock &= 0xFF;
3615 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3616 return;
3617
3618 /* Check if the server granted an oplock rather than a lease */
3619 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3620 return smb2_set_oplock_level(cinode, oplock, epoch,
3621 purge_cache);
3622
3623 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3624 new_oplock |= CIFS_CACHE_READ_FLG;
3625 strcat(message, "R");
3626 }
3627 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3628 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3629 strcat(message, "H");
3630 }
3631 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3632 new_oplock |= CIFS_CACHE_WRITE_FLG;
3633 strcat(message, "W");
3634 }
3635 if (!new_oplock)
3636 strncpy(message, "None", sizeof(message));
3637
3638 cinode->oplock = new_oplock;
3639 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3640 &cinode->vfs_inode);
3641 }
3642
3643 static void
3644 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3645 unsigned int epoch, bool *purge_cache)
3646 {
3647 unsigned int old_oplock = cinode->oplock;
3648
3649 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3650
3651 if (purge_cache) {
3652 *purge_cache = false;
3653 if (old_oplock == CIFS_CACHE_READ_FLG) {
3654 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3655 (epoch - cinode->epoch > 0))
3656 *purge_cache = true;
3657 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3658 (epoch - cinode->epoch > 1))
3659 *purge_cache = true;
3660 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3661 (epoch - cinode->epoch > 1))
3662 *purge_cache = true;
3663 else if (cinode->oplock == 0 &&
3664 (epoch - cinode->epoch > 0))
3665 *purge_cache = true;
3666 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3667 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3668 (epoch - cinode->epoch > 0))
3669 *purge_cache = true;
3670 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3671 (epoch - cinode->epoch > 1))
3672 *purge_cache = true;
3673 }
3674 cinode->epoch = epoch;
3675 }
3676 }
3677
3678 static bool
3679 smb2_is_read_op(__u32 oplock)
3680 {
3681 return oplock == SMB2_OPLOCK_LEVEL_II;
3682 }
3683
3684 static bool
3685 smb21_is_read_op(__u32 oplock)
3686 {
3687 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3688 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3689 }
3690
3691 static __le32
3692 map_oplock_to_lease(u8 oplock)
3693 {
3694 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3695 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3696 else if (oplock == SMB2_OPLOCK_LEVEL_II)
3697 return SMB2_LEASE_READ_CACHING;
3698 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3699 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3700 SMB2_LEASE_WRITE_CACHING;
3701 return 0;
3702 }
3703
3704 static char *
3705 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3706 {
3707 struct create_lease *buf;
3708
3709 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3710 if (!buf)
3711 return NULL;
3712
3713 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3714 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3715
3716 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3717 (struct create_lease, lcontext));
3718 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3719 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3720 (struct create_lease, Name));
3721 buf->ccontext.NameLength = cpu_to_le16(4);
3722 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3723 buf->Name[0] = 'R';
3724 buf->Name[1] = 'q';
3725 buf->Name[2] = 'L';
3726 buf->Name[3] = 's';
3727 return (char *)buf;
3728 }
3729
3730 static char *
3731 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3732 {
3733 struct create_lease_v2 *buf;
3734
3735 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3736 if (!buf)
3737 return NULL;
3738
3739 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3740 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3741
3742 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3743 (struct create_lease_v2, lcontext));
3744 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3745 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3746 (struct create_lease_v2, Name));
3747 buf->ccontext.NameLength = cpu_to_le16(4);
3748 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3749 buf->Name[0] = 'R';
3750 buf->Name[1] = 'q';
3751 buf->Name[2] = 'L';
3752 buf->Name[3] = 's';
3753 return (char *)buf;
3754 }
3755
3756 static __u8
3757 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3758 {
3759 struct create_lease *lc = (struct create_lease *)buf;
3760
3761 *epoch = 0; /* not used */
3762 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3763 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3764 return le32_to_cpu(lc->lcontext.LeaseState);
3765 }
3766
3767 static __u8
3768 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3769 {
3770 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3771
3772 *epoch = le16_to_cpu(lc->lcontext.Epoch);
3773 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3774 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3775 if (lease_key)
3776 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3777 return le32_to_cpu(lc->lcontext.LeaseState);
3778 }
3779
3780 static unsigned int
3781 smb2_wp_retry_size(struct inode *inode)
3782 {
3783 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3784 SMB2_MAX_BUFFER_SIZE);
3785 }
3786
3787 static bool
3788 smb2_dir_needs_close(struct cifsFileInfo *cfile)
3789 {
3790 return !cfile->invalidHandle;
3791 }
3792
3793 static void
3794 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3795 struct smb_rqst *old_rq, __le16 cipher_type)
3796 {
3797 struct smb2_sync_hdr *shdr =
3798 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3799
3800 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3801 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3802 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3803 tr_hdr->Flags = cpu_to_le16(0x01);
3804 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3805 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3806 else
3807 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3808 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3809 }
3810
3811 /* We can not use the normal sg_set_buf() as we will sometimes pass a
3812 * stack object as buf.
3813 */
3814 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3815 unsigned int buflen)
3816 {
3817 void *addr;
3818 /*
3819 * VMAP_STACK (at least) puts stack into the vmalloc address space
3820 */
3821 if (is_vmalloc_addr(buf))
3822 addr = vmalloc_to_page(buf);
3823 else
3824 addr = virt_to_page(buf);
3825 sg_set_page(sg, addr, buflen, offset_in_page(buf));
3826 }
3827
3828 /* Assumes the first rqst has a transform header as the first iov.
3829 * I.e.
3830 * rqst[0].rq_iov[0] is transform header
3831 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3832 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3833 */
3834 static struct scatterlist *
3835 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3836 {
3837 unsigned int sg_len;
3838 struct scatterlist *sg;
3839 unsigned int i;
3840 unsigned int j;
3841 unsigned int idx = 0;
3842 int skip;
3843
3844 sg_len = 1;
3845 for (i = 0; i < num_rqst; i++)
3846 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3847
3848 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3849 if (!sg)
3850 return NULL;
3851
3852 sg_init_table(sg, sg_len);
3853 for (i = 0; i < num_rqst; i++) {
3854 for (j = 0; j < rqst[i].rq_nvec; j++) {
3855 /*
3856 * The first rqst has a transform header where the
3857 * first 20 bytes are not part of the encrypted blob
3858 */
3859 skip = (i == 0) && (j == 0) ? 20 : 0;
3860 smb2_sg_set_buf(&sg[idx++],
3861 rqst[i].rq_iov[j].iov_base + skip,
3862 rqst[i].rq_iov[j].iov_len - skip);
3863 }
3864
3865 for (j = 0; j < rqst[i].rq_npages; j++) {
3866 unsigned int len, offset;
3867
3868 rqst_page_get_length(&rqst[i], j, &len, &offset);
3869 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3870 }
3871 }
3872 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3873 return sg;
3874 }
3875
3876 static int
3877 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3878 {
3879 struct cifs_ses *ses;
3880 u8 *ses_enc_key;
3881
3882 spin_lock(&cifs_tcp_ses_lock);
3883 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
3884 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3885 if (ses->Suid == ses_id) {
3886 ses_enc_key = enc ? ses->smb3encryptionkey :
3887 ses->smb3decryptionkey;
3888 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3889 spin_unlock(&cifs_tcp_ses_lock);
3890 return 0;
3891 }
3892 }
3893 }
3894 spin_unlock(&cifs_tcp_ses_lock);
3895
3896 return 1;
3897 }
3898 /*
3899 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3900 * iov[0] - transform header (associate data),
3901 * iov[1-N] - SMB2 header and pages - data to encrypt.
3902 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3903 * untouched.
3904 */
3905 static int
3906 crypt_message(struct TCP_Server_Info *server, int num_rqst,
3907 struct smb_rqst *rqst, int enc)
3908 {
3909 struct smb2_transform_hdr *tr_hdr =
3910 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3911 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3912 int rc = 0;
3913 struct scatterlist *sg;
3914 u8 sign[SMB2_SIGNATURE_SIZE] = {};
3915 u8 key[SMB3_SIGN_KEY_SIZE];
3916 struct aead_request *req;
3917 char *iv;
3918 unsigned int iv_len;
3919 DECLARE_CRYPTO_WAIT(wait);
3920 struct crypto_aead *tfm;
3921 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3922
3923 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3924 if (rc) {
3925 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3926 enc ? "en" : "de");
3927 return 0;
3928 }
3929
3930 rc = smb3_crypto_aead_allocate(server);
3931 if (rc) {
3932 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3933 return rc;
3934 }
3935
3936 tfm = enc ? server->secmech.ccmaesencrypt :
3937 server->secmech.ccmaesdecrypt;
3938 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3939 if (rc) {
3940 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3941 return rc;
3942 }
3943
3944 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3945 if (rc) {
3946 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3947 return rc;
3948 }
3949
3950 req = aead_request_alloc(tfm, GFP_KERNEL);
3951 if (!req) {
3952 cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3953 return -ENOMEM;
3954 }
3955
3956 if (!enc) {
3957 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3958 crypt_len += SMB2_SIGNATURE_SIZE;
3959 }
3960
3961 sg = init_sg(num_rqst, rqst, sign);
3962 if (!sg) {
3963 cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
3964 rc = -ENOMEM;
3965 goto free_req;
3966 }
3967
3968 iv_len = crypto_aead_ivsize(tfm);
3969 iv = kzalloc(iv_len, GFP_KERNEL);
3970 if (!iv) {
3971 cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3972 rc = -ENOMEM;
3973 goto free_sg;
3974 }
3975
3976 if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3977 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3978 else {
3979 iv[0] = 3;
3980 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3981 }
3982
3983 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3984 aead_request_set_ad(req, assoc_data_len);
3985
3986 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3987 crypto_req_done, &wait);
3988
3989 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3990 : crypto_aead_decrypt(req), &wait);
3991
3992 if (!rc && enc)
3993 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3994
3995 kfree(iv);
3996 free_sg:
3997 kfree(sg);
3998 free_req:
3999 kfree(req);
4000 return rc;
4001 }
4002
4003 void
4004 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4005 {
4006 int i, j;
4007
4008 for (i = 0; i < num_rqst; i++) {
4009 if (rqst[i].rq_pages) {
4010 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4011 put_page(rqst[i].rq_pages[j]);
4012 kfree(rqst[i].rq_pages);
4013 }
4014 }
4015 }
4016
4017 /*
4018 * This function will initialize new_rq and encrypt the content.
4019 * The first entry, new_rq[0], only contains a single iov which contains
4020 * a smb2_transform_hdr and is pre-allocated by the caller.
4021 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4022 *
4023 * The end result is an array of smb_rqst structures where the first structure
4024 * only contains a single iov for the transform header which we then can pass
4025 * to crypt_message().
4026 *
4027 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4028 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4029 */
4030 static int
4031 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4032 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4033 {
4034 struct page **pages;
4035 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4036 unsigned int npages;
4037 unsigned int orig_len = 0;
4038 int i, j;
4039 int rc = -ENOMEM;
4040
4041 for (i = 1; i < num_rqst; i++) {
4042 npages = old_rq[i - 1].rq_npages;
4043 pages = kmalloc_array(npages, sizeof(struct page *),
4044 GFP_KERNEL);
4045 if (!pages)
4046 goto err_free;
4047
4048 new_rq[i].rq_pages = pages;
4049 new_rq[i].rq_npages = npages;
4050 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
4051 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
4052 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
4053 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
4054 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
4055
4056 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
4057
4058 for (j = 0; j < npages; j++) {
4059 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4060 if (!pages[j])
4061 goto err_free;
4062 }
4063
4064 /* copy pages form the old */
4065 for (j = 0; j < npages; j++) {
4066 char *dst, *src;
4067 unsigned int offset, len;
4068
4069 rqst_page_get_length(&new_rq[i], j, &len, &offset);
4070
4071 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4072 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4073
4074 memcpy(dst, src, len);
4075 kunmap(new_rq[i].rq_pages[j]);
4076 kunmap(old_rq[i - 1].rq_pages[j]);
4077 }
4078 }
4079
4080 /* fill the 1st iov with a transform header */
4081 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4082
4083 rc = crypt_message(server, num_rqst, new_rq, 1);
4084 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4085 if (rc)
4086 goto err_free;
4087
4088 return rc;
4089
4090 err_free:
4091 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4092 return rc;
4093 }
4094
4095 static int
4096 smb3_is_transform_hdr(void *buf)
4097 {
4098 struct smb2_transform_hdr *trhdr = buf;
4099
4100 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4101 }
4102
4103 static int
4104 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4105 unsigned int buf_data_size, struct page **pages,
4106 unsigned int npages, unsigned int page_data_size)
4107 {
4108 struct kvec iov[2];
4109 struct smb_rqst rqst = {NULL};
4110 int rc;
4111
4112 iov[0].iov_base = buf;
4113 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4114 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4115 iov[1].iov_len = buf_data_size;
4116
4117 rqst.rq_iov = iov;
4118 rqst.rq_nvec = 2;
4119 rqst.rq_pages = pages;
4120 rqst.rq_npages = npages;
4121 rqst.rq_pagesz = PAGE_SIZE;
4122 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4123
4124 rc = crypt_message(server, 1, &rqst, 0);
4125 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4126
4127 if (rc)
4128 return rc;
4129
4130 memmove(buf, iov[1].iov_base, buf_data_size);
4131
4132 server->total_read = buf_data_size + page_data_size;
4133
4134 return rc;
4135 }
4136
4137 static int
4138 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4139 unsigned int npages, unsigned int len)
4140 {
4141 int i;
4142 int length;
4143
4144 for (i = 0; i < npages; i++) {
4145 struct page *page = pages[i];
4146 size_t n;
4147
4148 n = len;
4149 if (len >= PAGE_SIZE) {
4150 /* enough data to fill the page */
4151 n = PAGE_SIZE;
4152 len -= n;
4153 } else {
4154 zero_user(page, len, PAGE_SIZE - len);
4155 len = 0;
4156 }
4157 length = cifs_read_page_from_socket(server, page, 0, n);
4158 if (length < 0)
4159 return length;
4160 server->total_read += length;
4161 }
4162
4163 return 0;
4164 }
4165
4166 static int
4167 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4168 unsigned int cur_off, struct bio_vec **page_vec)
4169 {
4170 struct bio_vec *bvec;
4171 int i;
4172
4173 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4174 if (!bvec)
4175 return -ENOMEM;
4176
4177 for (i = 0; i < npages; i++) {
4178 bvec[i].bv_page = pages[i];
4179 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4180 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4181 data_size -= bvec[i].bv_len;
4182 }
4183
4184 if (data_size != 0) {
4185 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4186 kfree(bvec);
4187 return -EIO;
4188 }
4189
4190 *page_vec = bvec;
4191 return 0;
4192 }
4193
4194 static int
4195 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4196 char *buf, unsigned int buf_len, struct page **pages,
4197 unsigned int npages, unsigned int page_data_size)
4198 {
4199 unsigned int data_offset;
4200 unsigned int data_len;
4201 unsigned int cur_off;
4202 unsigned int cur_page_idx;
4203 unsigned int pad_len;
4204 struct cifs_readdata *rdata = mid->callback_data;
4205 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4206 struct bio_vec *bvec = NULL;
4207 struct iov_iter iter;
4208 struct kvec iov;
4209 int length;
4210 bool use_rdma_mr = false;
4211
4212 if (shdr->Command != SMB2_READ) {
4213 cifs_server_dbg(VFS, "only big read responses are supported\n");
4214 return -ENOTSUPP;
4215 }
4216
4217 if (server->ops->is_session_expired &&
4218 server->ops->is_session_expired(buf)) {
4219 cifs_reconnect(server);
4220 return -1;
4221 }
4222
4223 if (server->ops->is_status_pending &&
4224 server->ops->is_status_pending(buf, server))
4225 return -1;
4226
4227 /* set up first two iov to get credits */
4228 rdata->iov[0].iov_base = buf;
4229 rdata->iov[0].iov_len = 0;
4230 rdata->iov[1].iov_base = buf;
4231 rdata->iov[1].iov_len =
4232 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4233 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4234 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4235 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4236 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4237
4238 rdata->result = server->ops->map_error(buf, true);
4239 if (rdata->result != 0) {
4240 cifs_dbg(FYI, "%s: server returned error %d\n",
4241 __func__, rdata->result);
4242 /* normal error on read response */
4243 dequeue_mid(mid, false);
4244 return 0;
4245 }
4246
4247 data_offset = server->ops->read_data_offset(buf);
4248 #ifdef CONFIG_CIFS_SMB_DIRECT
4249 use_rdma_mr = rdata->mr;
4250 #endif
4251 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4252
4253 if (data_offset < server->vals->read_rsp_size) {
4254 /*
4255 * win2k8 sometimes sends an offset of 0 when the read
4256 * is beyond the EOF. Treat it as if the data starts just after
4257 * the header.
4258 */
4259 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4260 __func__, data_offset);
4261 data_offset = server->vals->read_rsp_size;
4262 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4263 /* data_offset is beyond the end of smallbuf */
4264 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4265 __func__, data_offset);
4266 rdata->result = -EIO;
4267 dequeue_mid(mid, rdata->result);
4268 return 0;
4269 }
4270
4271 pad_len = data_offset - server->vals->read_rsp_size;
4272
4273 if (buf_len <= data_offset) {
4274 /* read response payload is in pages */
4275 cur_page_idx = pad_len / PAGE_SIZE;
4276 cur_off = pad_len % PAGE_SIZE;
4277
4278 if (cur_page_idx != 0) {
4279 /* data offset is beyond the 1st page of response */
4280 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4281 __func__, data_offset);
4282 rdata->result = -EIO;
4283 dequeue_mid(mid, rdata->result);
4284 return 0;
4285 }
4286
4287 if (data_len > page_data_size - pad_len) {
4288 /* data_len is corrupt -- discard frame */
4289 rdata->result = -EIO;
4290 dequeue_mid(mid, rdata->result);
4291 return 0;
4292 }
4293
4294 rdata->result = init_read_bvec(pages, npages, page_data_size,
4295 cur_off, &bvec);
4296 if (rdata->result != 0) {
4297 dequeue_mid(mid, rdata->result);
4298 return 0;
4299 }
4300
4301 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4302 } else if (buf_len >= data_offset + data_len) {
4303 /* read response payload is in buf */
4304 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4305 iov.iov_base = buf + data_offset;
4306 iov.iov_len = data_len;
4307 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4308 } else {
4309 /* read response payload cannot be in both buf and pages */
4310 WARN_ONCE(1, "buf can not contain only a part of read data");
4311 rdata->result = -EIO;
4312 dequeue_mid(mid, rdata->result);
4313 return 0;
4314 }
4315
4316 length = rdata->copy_into_pages(server, rdata, &iter);
4317
4318 kfree(bvec);
4319
4320 if (length < 0)
4321 return length;
4322
4323 dequeue_mid(mid, false);
4324 return length;
4325 }
4326
4327 struct smb2_decrypt_work {
4328 struct work_struct decrypt;
4329 struct TCP_Server_Info *server;
4330 struct page **ppages;
4331 char *buf;
4332 unsigned int npages;
4333 unsigned int len;
4334 };
4335
4336
4337 static void smb2_decrypt_offload(struct work_struct *work)
4338 {
4339 struct smb2_decrypt_work *dw = container_of(work,
4340 struct smb2_decrypt_work, decrypt);
4341 int i, rc;
4342 struct mid_q_entry *mid;
4343
4344 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4345 dw->ppages, dw->npages, dw->len);
4346 if (rc) {
4347 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4348 goto free_pages;
4349 }
4350
4351 dw->server->lstrp = jiffies;
4352 mid = smb2_find_mid(dw->server, dw->buf);
4353 if (mid == NULL)
4354 cifs_dbg(FYI, "mid not found\n");
4355 else {
4356 mid->decrypted = true;
4357 rc = handle_read_data(dw->server, mid, dw->buf,
4358 dw->server->vals->read_rsp_size,
4359 dw->ppages, dw->npages, dw->len);
4360 mid->callback(mid);
4361 cifs_mid_q_entry_release(mid);
4362 }
4363
4364 free_pages:
4365 for (i = dw->npages-1; i >= 0; i--)
4366 put_page(dw->ppages[i]);
4367
4368 kfree(dw->ppages);
4369 cifs_small_buf_release(dw->buf);
4370 kfree(dw);
4371 }
4372
4373
4374 static int
4375 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4376 int *num_mids)
4377 {
4378 char *buf = server->smallbuf;
4379 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4380 unsigned int npages;
4381 struct page **pages;
4382 unsigned int len;
4383 unsigned int buflen = server->pdu_size;
4384 int rc;
4385 int i = 0;
4386 struct smb2_decrypt_work *dw;
4387
4388 *num_mids = 1;
4389 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4390 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4391
4392 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4393 if (rc < 0)
4394 return rc;
4395 server->total_read += rc;
4396
4397 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4398 server->vals->read_rsp_size;
4399 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4400
4401 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4402 if (!pages) {
4403 rc = -ENOMEM;
4404 goto discard_data;
4405 }
4406
4407 for (; i < npages; i++) {
4408 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4409 if (!pages[i]) {
4410 rc = -ENOMEM;
4411 goto discard_data;
4412 }
4413 }
4414
4415 /* read read data into pages */
4416 rc = read_data_into_pages(server, pages, npages, len);
4417 if (rc)
4418 goto free_pages;
4419
4420 rc = cifs_discard_remaining_data(server);
4421 if (rc)
4422 goto free_pages;
4423
4424 /*
4425 * For large reads, offload to different thread for better performance,
4426 * use more cores decrypting which can be expensive
4427 */
4428
4429 if ((server->min_offload) && (server->in_flight > 1) &&
4430 (server->pdu_size >= server->min_offload)) {
4431 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4432 if (dw == NULL)
4433 goto non_offloaded_decrypt;
4434
4435 dw->buf = server->smallbuf;
4436 server->smallbuf = (char *)cifs_small_buf_get();
4437
4438 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4439
4440 dw->npages = npages;
4441 dw->server = server;
4442 dw->ppages = pages;
4443 dw->len = len;
4444 queue_work(decrypt_wq, &dw->decrypt);
4445 *num_mids = 0; /* worker thread takes care of finding mid */
4446 return -1;
4447 }
4448
4449 non_offloaded_decrypt:
4450 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4451 pages, npages, len);
4452 if (rc)
4453 goto free_pages;
4454
4455 *mid = smb2_find_mid(server, buf);
4456 if (*mid == NULL)
4457 cifs_dbg(FYI, "mid not found\n");
4458 else {
4459 cifs_dbg(FYI, "mid found\n");
4460 (*mid)->decrypted = true;
4461 rc = handle_read_data(server, *mid, buf,
4462 server->vals->read_rsp_size,
4463 pages, npages, len);
4464 }
4465
4466 free_pages:
4467 for (i = i - 1; i >= 0; i--)
4468 put_page(pages[i]);
4469 kfree(pages);
4470 return rc;
4471 discard_data:
4472 cifs_discard_remaining_data(server);
4473 goto free_pages;
4474 }
4475
4476 static int
4477 receive_encrypted_standard(struct TCP_Server_Info *server,
4478 struct mid_q_entry **mids, char **bufs,
4479 int *num_mids)
4480 {
4481 int ret, length;
4482 char *buf = server->smallbuf;
4483 struct smb2_sync_hdr *shdr;
4484 unsigned int pdu_length = server->pdu_size;
4485 unsigned int buf_size;
4486 struct mid_q_entry *mid_entry;
4487 int next_is_large;
4488 char *next_buffer = NULL;
4489
4490 *num_mids = 0;
4491
4492 /* switch to large buffer if too big for a small one */
4493 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4494 server->large_buf = true;
4495 memcpy(server->bigbuf, buf, server->total_read);
4496 buf = server->bigbuf;
4497 }
4498
4499 /* now read the rest */
4500 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4501 pdu_length - HEADER_SIZE(server) + 1);
4502 if (length < 0)
4503 return length;
4504 server->total_read += length;
4505
4506 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4507 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4508 if (length)
4509 return length;
4510
4511 next_is_large = server->large_buf;
4512 one_more:
4513 shdr = (struct smb2_sync_hdr *)buf;
4514 if (shdr->NextCommand) {
4515 if (next_is_large)
4516 next_buffer = (char *)cifs_buf_get();
4517 else
4518 next_buffer = (char *)cifs_small_buf_get();
4519 memcpy(next_buffer,
4520 buf + le32_to_cpu(shdr->NextCommand),
4521 pdu_length - le32_to_cpu(shdr->NextCommand));
4522 }
4523
4524 mid_entry = smb2_find_mid(server, buf);
4525 if (mid_entry == NULL)
4526 cifs_dbg(FYI, "mid not found\n");
4527 else {
4528 cifs_dbg(FYI, "mid found\n");
4529 mid_entry->decrypted = true;
4530 mid_entry->resp_buf_size = server->pdu_size;
4531 }
4532
4533 if (*num_mids >= MAX_COMPOUND) {
4534 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4535 return -1;
4536 }
4537 bufs[*num_mids] = buf;
4538 mids[(*num_mids)++] = mid_entry;
4539
4540 if (mid_entry && mid_entry->handle)
4541 ret = mid_entry->handle(server, mid_entry);
4542 else
4543 ret = cifs_handle_standard(server, mid_entry);
4544
4545 if (ret == 0 && shdr->NextCommand) {
4546 pdu_length -= le32_to_cpu(shdr->NextCommand);
4547 server->large_buf = next_is_large;
4548 if (next_is_large)
4549 server->bigbuf = buf = next_buffer;
4550 else
4551 server->smallbuf = buf = next_buffer;
4552 goto one_more;
4553 } else if (ret != 0) {
4554 /*
4555 * ret != 0 here means that we didn't get to handle_mid() thus
4556 * server->smallbuf and server->bigbuf are still valid. We need
4557 * to free next_buffer because it is not going to be used
4558 * anywhere.
4559 */
4560 if (next_is_large)
4561 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4562 else
4563 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4564 }
4565
4566 return ret;
4567 }
4568
4569 static int
4570 smb3_receive_transform(struct TCP_Server_Info *server,
4571 struct mid_q_entry **mids, char **bufs, int *num_mids)
4572 {
4573 char *buf = server->smallbuf;
4574 unsigned int pdu_length = server->pdu_size;
4575 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4576 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4577
4578 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4579 sizeof(struct smb2_sync_hdr)) {
4580 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4581 pdu_length);
4582 cifs_reconnect(server);
4583 return -ECONNABORTED;
4584 }
4585
4586 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4587 cifs_server_dbg(VFS, "Transform message is broken\n");
4588 cifs_reconnect(server);
4589 return -ECONNABORTED;
4590 }
4591
4592 /* TODO: add support for compounds containing READ. */
4593 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4594 return receive_encrypted_read(server, &mids[0], num_mids);
4595 }
4596
4597 return receive_encrypted_standard(server, mids, bufs, num_mids);
4598 }
4599
4600 int
4601 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4602 {
4603 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4604
4605 return handle_read_data(server, mid, buf, server->pdu_size,
4606 NULL, 0, 0);
4607 }
4608
4609 static int
4610 smb2_next_header(char *buf)
4611 {
4612 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4613 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4614
4615 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4616 return sizeof(struct smb2_transform_hdr) +
4617 le32_to_cpu(t_hdr->OriginalMessageSize);
4618
4619 return le32_to_cpu(hdr->NextCommand);
4620 }
4621
4622 static int
4623 smb2_make_node(unsigned int xid, struct inode *inode,
4624 struct dentry *dentry, struct cifs_tcon *tcon,
4625 char *full_path, umode_t mode, dev_t dev)
4626 {
4627 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4628 int rc = -EPERM;
4629 FILE_ALL_INFO *buf = NULL;
4630 struct cifs_io_parms io_parms = {0};
4631 __u32 oplock = 0;
4632 struct cifs_fid fid;
4633 struct cifs_open_parms oparms;
4634 unsigned int bytes_written;
4635 struct win_dev *pdev;
4636 struct kvec iov[2];
4637
4638 /*
4639 * Check if mounted with mount parm 'sfu' mount parm.
4640 * SFU emulation should work with all servers, but only
4641 * supports block and char device (no socket & fifo),
4642 * and was used by default in earlier versions of Windows
4643 */
4644 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4645 goto out;
4646
4647 /*
4648 * TODO: Add ability to create instead via reparse point. Windows (e.g.
4649 * their current NFS server) uses this approach to expose special files
4650 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4651 */
4652
4653 if (!S_ISCHR(mode) && !S_ISBLK(mode))
4654 goto out;
4655
4656 cifs_dbg(FYI, "sfu compat create special file\n");
4657
4658 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4659 if (buf == NULL) {
4660 rc = -ENOMEM;
4661 goto out;
4662 }
4663
4664 oparms.tcon = tcon;
4665 oparms.cifs_sb = cifs_sb;
4666 oparms.desired_access = GENERIC_WRITE;
4667 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
4668 CREATE_OPTION_SPECIAL);
4669 oparms.disposition = FILE_CREATE;
4670 oparms.path = full_path;
4671 oparms.fid = &fid;
4672 oparms.reconnect = false;
4673
4674 if (tcon->ses->server->oplocks)
4675 oplock = REQ_OPLOCK;
4676 else
4677 oplock = 0;
4678 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4679 if (rc)
4680 goto out;
4681
4682 /*
4683 * BB Do not bother to decode buf since no local inode yet to put
4684 * timestamps in, but we can reuse it safely.
4685 */
4686
4687 pdev = (struct win_dev *)buf;
4688 io_parms.pid = current->tgid;
4689 io_parms.tcon = tcon;
4690 io_parms.offset = 0;
4691 io_parms.length = sizeof(struct win_dev);
4692 iov[1].iov_base = buf;
4693 iov[1].iov_len = sizeof(struct win_dev);
4694 if (S_ISCHR(mode)) {
4695 memcpy(pdev->type, "IntxCHR", 8);
4696 pdev->major = cpu_to_le64(MAJOR(dev));
4697 pdev->minor = cpu_to_le64(MINOR(dev));
4698 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4699 &bytes_written, iov, 1);
4700 } else if (S_ISBLK(mode)) {
4701 memcpy(pdev->type, "IntxBLK", 8);
4702 pdev->major = cpu_to_le64(MAJOR(dev));
4703 pdev->minor = cpu_to_le64(MINOR(dev));
4704 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4705 &bytes_written, iov, 1);
4706 }
4707 tcon->ses->server->ops->close(xid, tcon, &fid);
4708 d_drop(dentry);
4709
4710 /* FIXME: add code here to set EAs */
4711 out:
4712 kfree(buf);
4713 return rc;
4714 }
4715
4716
4717 struct smb_version_operations smb20_operations = {
4718 .compare_fids = smb2_compare_fids,
4719 .setup_request = smb2_setup_request,
4720 .setup_async_request = smb2_setup_async_request,
4721 .check_receive = smb2_check_receive,
4722 .add_credits = smb2_add_credits,
4723 .set_credits = smb2_set_credits,
4724 .get_credits_field = smb2_get_credits_field,
4725 .get_credits = smb2_get_credits,
4726 .wait_mtu_credits = cifs_wait_mtu_credits,
4727 .get_next_mid = smb2_get_next_mid,
4728 .revert_current_mid = smb2_revert_current_mid,
4729 .read_data_offset = smb2_read_data_offset,
4730 .read_data_length = smb2_read_data_length,
4731 .map_error = map_smb2_to_linux_error,
4732 .find_mid = smb2_find_mid,
4733 .check_message = smb2_check_message,
4734 .dump_detail = smb2_dump_detail,
4735 .clear_stats = smb2_clear_stats,
4736 .print_stats = smb2_print_stats,
4737 .is_oplock_break = smb2_is_valid_oplock_break,
4738 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4739 .downgrade_oplock = smb2_downgrade_oplock,
4740 .need_neg = smb2_need_neg,
4741 .negotiate = smb2_negotiate,
4742 .negotiate_wsize = smb2_negotiate_wsize,
4743 .negotiate_rsize = smb2_negotiate_rsize,
4744 .sess_setup = SMB2_sess_setup,
4745 .logoff = SMB2_logoff,
4746 .tree_connect = SMB2_tcon,
4747 .tree_disconnect = SMB2_tdis,
4748 .qfs_tcon = smb2_qfs_tcon,
4749 .is_path_accessible = smb2_is_path_accessible,
4750 .can_echo = smb2_can_echo,
4751 .echo = SMB2_echo,
4752 .query_path_info = smb2_query_path_info,
4753 .get_srv_inum = smb2_get_srv_inum,
4754 .query_file_info = smb2_query_file_info,
4755 .set_path_size = smb2_set_path_size,
4756 .set_file_size = smb2_set_file_size,
4757 .set_file_info = smb2_set_file_info,
4758 .set_compression = smb2_set_compression,
4759 .mkdir = smb2_mkdir,
4760 .mkdir_setinfo = smb2_mkdir_setinfo,
4761 .rmdir = smb2_rmdir,
4762 .unlink = smb2_unlink,
4763 .rename = smb2_rename_path,
4764 .create_hardlink = smb2_create_hardlink,
4765 .query_symlink = smb2_query_symlink,
4766 .query_mf_symlink = smb3_query_mf_symlink,
4767 .create_mf_symlink = smb3_create_mf_symlink,
4768 .open = smb2_open_file,
4769 .set_fid = smb2_set_fid,
4770 .close = smb2_close_file,
4771 .flush = smb2_flush_file,
4772 .async_readv = smb2_async_readv,
4773 .async_writev = smb2_async_writev,
4774 .sync_read = smb2_sync_read,
4775 .sync_write = smb2_sync_write,
4776 .query_dir_first = smb2_query_dir_first,
4777 .query_dir_next = smb2_query_dir_next,
4778 .close_dir = smb2_close_dir,
4779 .calc_smb_size = smb2_calc_size,
4780 .is_status_pending = smb2_is_status_pending,
4781 .is_session_expired = smb2_is_session_expired,
4782 .oplock_response = smb2_oplock_response,
4783 .queryfs = smb2_queryfs,
4784 .mand_lock = smb2_mand_lock,
4785 .mand_unlock_range = smb2_unlock_range,
4786 .push_mand_locks = smb2_push_mandatory_locks,
4787 .get_lease_key = smb2_get_lease_key,
4788 .set_lease_key = smb2_set_lease_key,
4789 .new_lease_key = smb2_new_lease_key,
4790 .calc_signature = smb2_calc_signature,
4791 .is_read_op = smb2_is_read_op,
4792 .set_oplock_level = smb2_set_oplock_level,
4793 .create_lease_buf = smb2_create_lease_buf,
4794 .parse_lease_buf = smb2_parse_lease_buf,
4795 .copychunk_range = smb2_copychunk_range,
4796 .wp_retry_size = smb2_wp_retry_size,
4797 .dir_needs_close = smb2_dir_needs_close,
4798 .get_dfs_refer = smb2_get_dfs_refer,
4799 .select_sectype = smb2_select_sectype,
4800 #ifdef CONFIG_CIFS_XATTR
4801 .query_all_EAs = smb2_query_eas,
4802 .set_EA = smb2_set_ea,
4803 #endif /* CIFS_XATTR */
4804 .get_acl = get_smb2_acl,
4805 .get_acl_by_fid = get_smb2_acl_by_fid,
4806 .set_acl = set_smb2_acl,
4807 .next_header = smb2_next_header,
4808 .ioctl_query_info = smb2_ioctl_query_info,
4809 .make_node = smb2_make_node,
4810 .fiemap = smb3_fiemap,
4811 .llseek = smb3_llseek,
4812 };
4813
4814 struct smb_version_operations smb21_operations = {
4815 .compare_fids = smb2_compare_fids,
4816 .setup_request = smb2_setup_request,
4817 .setup_async_request = smb2_setup_async_request,
4818 .check_receive = smb2_check_receive,
4819 .add_credits = smb2_add_credits,
4820 .set_credits = smb2_set_credits,
4821 .get_credits_field = smb2_get_credits_field,
4822 .get_credits = smb2_get_credits,
4823 .wait_mtu_credits = smb2_wait_mtu_credits,
4824 .adjust_credits = smb2_adjust_credits,
4825 .get_next_mid = smb2_get_next_mid,
4826 .revert_current_mid = smb2_revert_current_mid,
4827 .read_data_offset = smb2_read_data_offset,
4828 .read_data_length = smb2_read_data_length,
4829 .map_error = map_smb2_to_linux_error,
4830 .find_mid = smb2_find_mid,
4831 .check_message = smb2_check_message,
4832 .dump_detail = smb2_dump_detail,
4833 .clear_stats = smb2_clear_stats,
4834 .print_stats = smb2_print_stats,
4835 .is_oplock_break = smb2_is_valid_oplock_break,
4836 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4837 .downgrade_oplock = smb2_downgrade_oplock,
4838 .need_neg = smb2_need_neg,
4839 .negotiate = smb2_negotiate,
4840 .negotiate_wsize = smb2_negotiate_wsize,
4841 .negotiate_rsize = smb2_negotiate_rsize,
4842 .sess_setup = SMB2_sess_setup,
4843 .logoff = SMB2_logoff,
4844 .tree_connect = SMB2_tcon,
4845 .tree_disconnect = SMB2_tdis,
4846 .qfs_tcon = smb2_qfs_tcon,
4847 .is_path_accessible = smb2_is_path_accessible,
4848 .can_echo = smb2_can_echo,
4849 .echo = SMB2_echo,
4850 .query_path_info = smb2_query_path_info,
4851 .get_srv_inum = smb2_get_srv_inum,
4852 .query_file_info = smb2_query_file_info,
4853 .set_path_size = smb2_set_path_size,
4854 .set_file_size = smb2_set_file_size,
4855 .set_file_info = smb2_set_file_info,
4856 .set_compression = smb2_set_compression,
4857 .mkdir = smb2_mkdir,
4858 .mkdir_setinfo = smb2_mkdir_setinfo,
4859 .rmdir = smb2_rmdir,
4860 .unlink = smb2_unlink,
4861 .rename = smb2_rename_path,
4862 .create_hardlink = smb2_create_hardlink,
4863 .query_symlink = smb2_query_symlink,
4864 .query_mf_symlink = smb3_query_mf_symlink,
4865 .create_mf_symlink = smb3_create_mf_symlink,
4866 .open = smb2_open_file,
4867 .set_fid = smb2_set_fid,
4868 .close = smb2_close_file,
4869 .flush = smb2_flush_file,
4870 .async_readv = smb2_async_readv,
4871 .async_writev = smb2_async_writev,
4872 .sync_read = smb2_sync_read,
4873 .sync_write = smb2_sync_write,
4874 .query_dir_first = smb2_query_dir_first,
4875 .query_dir_next = smb2_query_dir_next,
4876 .close_dir = smb2_close_dir,
4877 .calc_smb_size = smb2_calc_size,
4878 .is_status_pending = smb2_is_status_pending,
4879 .is_session_expired = smb2_is_session_expired,
4880 .oplock_response = smb2_oplock_response,
4881 .queryfs = smb2_queryfs,
4882 .mand_lock = smb2_mand_lock,
4883 .mand_unlock_range = smb2_unlock_range,
4884 .push_mand_locks = smb2_push_mandatory_locks,
4885 .get_lease_key = smb2_get_lease_key,
4886 .set_lease_key = smb2_set_lease_key,
4887 .new_lease_key = smb2_new_lease_key,
4888 .calc_signature = smb2_calc_signature,
4889 .is_read_op = smb21_is_read_op,
4890 .set_oplock_level = smb21_set_oplock_level,
4891 .create_lease_buf = smb2_create_lease_buf,
4892 .parse_lease_buf = smb2_parse_lease_buf,
4893 .copychunk_range = smb2_copychunk_range,
4894 .wp_retry_size = smb2_wp_retry_size,
4895 .dir_needs_close = smb2_dir_needs_close,
4896 .enum_snapshots = smb3_enum_snapshots,
4897 .notify = smb3_notify,
4898 .get_dfs_refer = smb2_get_dfs_refer,
4899 .select_sectype = smb2_select_sectype,
4900 #ifdef CONFIG_CIFS_XATTR
4901 .query_all_EAs = smb2_query_eas,
4902 .set_EA = smb2_set_ea,
4903 #endif /* CIFS_XATTR */
4904 .get_acl = get_smb2_acl,
4905 .get_acl_by_fid = get_smb2_acl_by_fid,
4906 .set_acl = set_smb2_acl,
4907 .next_header = smb2_next_header,
4908 .ioctl_query_info = smb2_ioctl_query_info,
4909 .make_node = smb2_make_node,
4910 .fiemap = smb3_fiemap,
4911 .llseek = smb3_llseek,
4912 };
4913
4914 struct smb_version_operations smb30_operations = {
4915 .compare_fids = smb2_compare_fids,
4916 .setup_request = smb2_setup_request,
4917 .setup_async_request = smb2_setup_async_request,
4918 .check_receive = smb2_check_receive,
4919 .add_credits = smb2_add_credits,
4920 .set_credits = smb2_set_credits,
4921 .get_credits_field = smb2_get_credits_field,
4922 .get_credits = smb2_get_credits,
4923 .wait_mtu_credits = smb2_wait_mtu_credits,
4924 .adjust_credits = smb2_adjust_credits,
4925 .get_next_mid = smb2_get_next_mid,
4926 .revert_current_mid = smb2_revert_current_mid,
4927 .read_data_offset = smb2_read_data_offset,
4928 .read_data_length = smb2_read_data_length,
4929 .map_error = map_smb2_to_linux_error,
4930 .find_mid = smb2_find_mid,
4931 .check_message = smb2_check_message,
4932 .dump_detail = smb2_dump_detail,
4933 .clear_stats = smb2_clear_stats,
4934 .print_stats = smb2_print_stats,
4935 .dump_share_caps = smb2_dump_share_caps,
4936 .is_oplock_break = smb2_is_valid_oplock_break,
4937 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4938 .downgrade_oplock = smb3_downgrade_oplock,
4939 .need_neg = smb2_need_neg,
4940 .negotiate = smb2_negotiate,
4941 .negotiate_wsize = smb3_negotiate_wsize,
4942 .negotiate_rsize = smb3_negotiate_rsize,
4943 .sess_setup = SMB2_sess_setup,
4944 .logoff = SMB2_logoff,
4945 .tree_connect = SMB2_tcon,
4946 .tree_disconnect = SMB2_tdis,
4947 .qfs_tcon = smb3_qfs_tcon,
4948 .is_path_accessible = smb2_is_path_accessible,
4949 .can_echo = smb2_can_echo,
4950 .echo = SMB2_echo,
4951 .query_path_info = smb2_query_path_info,
4952 .get_srv_inum = smb2_get_srv_inum,
4953 .query_file_info = smb2_query_file_info,
4954 .set_path_size = smb2_set_path_size,
4955 .set_file_size = smb2_set_file_size,
4956 .set_file_info = smb2_set_file_info,
4957 .set_compression = smb2_set_compression,
4958 .mkdir = smb2_mkdir,
4959 .mkdir_setinfo = smb2_mkdir_setinfo,
4960 .rmdir = smb2_rmdir,
4961 .unlink = smb2_unlink,
4962 .rename = smb2_rename_path,
4963 .create_hardlink = smb2_create_hardlink,
4964 .query_symlink = smb2_query_symlink,
4965 .query_mf_symlink = smb3_query_mf_symlink,
4966 .create_mf_symlink = smb3_create_mf_symlink,
4967 .open = smb2_open_file,
4968 .set_fid = smb2_set_fid,
4969 .close = smb2_close_file,
4970 .close_getattr = smb2_close_getattr,
4971 .flush = smb2_flush_file,
4972 .async_readv = smb2_async_readv,
4973 .async_writev = smb2_async_writev,
4974 .sync_read = smb2_sync_read,
4975 .sync_write = smb2_sync_write,
4976 .query_dir_first = smb2_query_dir_first,
4977 .query_dir_next = smb2_query_dir_next,
4978 .close_dir = smb2_close_dir,
4979 .calc_smb_size = smb2_calc_size,
4980 .is_status_pending = smb2_is_status_pending,
4981 .is_session_expired = smb2_is_session_expired,
4982 .oplock_response = smb2_oplock_response,
4983 .queryfs = smb2_queryfs,
4984 .mand_lock = smb2_mand_lock,
4985 .mand_unlock_range = smb2_unlock_range,
4986 .push_mand_locks = smb2_push_mandatory_locks,
4987 .get_lease_key = smb2_get_lease_key,
4988 .set_lease_key = smb2_set_lease_key,
4989 .new_lease_key = smb2_new_lease_key,
4990 .generate_signingkey = generate_smb30signingkey,
4991 .calc_signature = smb3_calc_signature,
4992 .set_integrity = smb3_set_integrity,
4993 .is_read_op = smb21_is_read_op,
4994 .set_oplock_level = smb3_set_oplock_level,
4995 .create_lease_buf = smb3_create_lease_buf,
4996 .parse_lease_buf = smb3_parse_lease_buf,
4997 .copychunk_range = smb2_copychunk_range,
4998 .duplicate_extents = smb2_duplicate_extents,
4999 .validate_negotiate = smb3_validate_negotiate,
5000 .wp_retry_size = smb2_wp_retry_size,
5001 .dir_needs_close = smb2_dir_needs_close,
5002 .fallocate = smb3_fallocate,
5003 .enum_snapshots = smb3_enum_snapshots,
5004 .notify = smb3_notify,
5005 .init_transform_rq = smb3_init_transform_rq,
5006 .is_transform_hdr = smb3_is_transform_hdr,
5007 .receive_transform = smb3_receive_transform,
5008 .get_dfs_refer = smb2_get_dfs_refer,
5009 .select_sectype = smb2_select_sectype,
5010 #ifdef CONFIG_CIFS_XATTR
5011 .query_all_EAs = smb2_query_eas,
5012 .set_EA = smb2_set_ea,
5013 #endif /* CIFS_XATTR */
5014 .get_acl = get_smb2_acl,
5015 .get_acl_by_fid = get_smb2_acl_by_fid,
5016 .set_acl = set_smb2_acl,
5017 .next_header = smb2_next_header,
5018 .ioctl_query_info = smb2_ioctl_query_info,
5019 .make_node = smb2_make_node,
5020 .fiemap = smb3_fiemap,
5021 .llseek = smb3_llseek,
5022 };
5023
5024 struct smb_version_operations smb311_operations = {
5025 .compare_fids = smb2_compare_fids,
5026 .setup_request = smb2_setup_request,
5027 .setup_async_request = smb2_setup_async_request,
5028 .check_receive = smb2_check_receive,
5029 .add_credits = smb2_add_credits,
5030 .set_credits = smb2_set_credits,
5031 .get_credits_field = smb2_get_credits_field,
5032 .get_credits = smb2_get_credits,
5033 .wait_mtu_credits = smb2_wait_mtu_credits,
5034 .adjust_credits = smb2_adjust_credits,
5035 .get_next_mid = smb2_get_next_mid,
5036 .revert_current_mid = smb2_revert_current_mid,
5037 .read_data_offset = smb2_read_data_offset,
5038 .read_data_length = smb2_read_data_length,
5039 .map_error = map_smb2_to_linux_error,
5040 .find_mid = smb2_find_mid,
5041 .check_message = smb2_check_message,
5042 .dump_detail = smb2_dump_detail,
5043 .clear_stats = smb2_clear_stats,
5044 .print_stats = smb2_print_stats,
5045 .dump_share_caps = smb2_dump_share_caps,
5046 .is_oplock_break = smb2_is_valid_oplock_break,
5047 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5048 .downgrade_oplock = smb3_downgrade_oplock,
5049 .need_neg = smb2_need_neg,
5050 .negotiate = smb2_negotiate,
5051 .negotiate_wsize = smb3_negotiate_wsize,
5052 .negotiate_rsize = smb3_negotiate_rsize,
5053 .sess_setup = SMB2_sess_setup,
5054 .logoff = SMB2_logoff,
5055 .tree_connect = SMB2_tcon,
5056 .tree_disconnect = SMB2_tdis,
5057 .qfs_tcon = smb3_qfs_tcon,
5058 .is_path_accessible = smb2_is_path_accessible,
5059 .can_echo = smb2_can_echo,
5060 .echo = SMB2_echo,
5061 .query_path_info = smb2_query_path_info,
5062 .get_srv_inum = smb2_get_srv_inum,
5063 .query_file_info = smb2_query_file_info,
5064 .set_path_size = smb2_set_path_size,
5065 .set_file_size = smb2_set_file_size,
5066 .set_file_info = smb2_set_file_info,
5067 .set_compression = smb2_set_compression,
5068 .mkdir = smb2_mkdir,
5069 .mkdir_setinfo = smb2_mkdir_setinfo,
5070 .posix_mkdir = smb311_posix_mkdir,
5071 .rmdir = smb2_rmdir,
5072 .unlink = smb2_unlink,
5073 .rename = smb2_rename_path,
5074 .create_hardlink = smb2_create_hardlink,
5075 .query_symlink = smb2_query_symlink,
5076 .query_mf_symlink = smb3_query_mf_symlink,
5077 .create_mf_symlink = smb3_create_mf_symlink,
5078 .open = smb2_open_file,
5079 .set_fid = smb2_set_fid,
5080 .close = smb2_close_file,
5081 .close_getattr = smb2_close_getattr,
5082 .flush = smb2_flush_file,
5083 .async_readv = smb2_async_readv,
5084 .async_writev = smb2_async_writev,
5085 .sync_read = smb2_sync_read,
5086 .sync_write = smb2_sync_write,
5087 .query_dir_first = smb2_query_dir_first,
5088 .query_dir_next = smb2_query_dir_next,
5089 .close_dir = smb2_close_dir,
5090 .calc_smb_size = smb2_calc_size,
5091 .is_status_pending = smb2_is_status_pending,
5092 .is_session_expired = smb2_is_session_expired,
5093 .oplock_response = smb2_oplock_response,
5094 .queryfs = smb311_queryfs,
5095 .mand_lock = smb2_mand_lock,
5096 .mand_unlock_range = smb2_unlock_range,
5097 .push_mand_locks = smb2_push_mandatory_locks,
5098 .get_lease_key = smb2_get_lease_key,
5099 .set_lease_key = smb2_set_lease_key,
5100 .new_lease_key = smb2_new_lease_key,
5101 .generate_signingkey = generate_smb311signingkey,
5102 .calc_signature = smb3_calc_signature,
5103 .set_integrity = smb3_set_integrity,
5104 .is_read_op = smb21_is_read_op,
5105 .set_oplock_level = smb3_set_oplock_level,
5106 .create_lease_buf = smb3_create_lease_buf,
5107 .parse_lease_buf = smb3_parse_lease_buf,
5108 .copychunk_range = smb2_copychunk_range,
5109 .duplicate_extents = smb2_duplicate_extents,
5110 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5111 .wp_retry_size = smb2_wp_retry_size,
5112 .dir_needs_close = smb2_dir_needs_close,
5113 .fallocate = smb3_fallocate,
5114 .enum_snapshots = smb3_enum_snapshots,
5115 .notify = smb3_notify,
5116 .init_transform_rq = smb3_init_transform_rq,
5117 .is_transform_hdr = smb3_is_transform_hdr,
5118 .receive_transform = smb3_receive_transform,
5119 .get_dfs_refer = smb2_get_dfs_refer,
5120 .select_sectype = smb2_select_sectype,
5121 #ifdef CONFIG_CIFS_XATTR
5122 .query_all_EAs = smb2_query_eas,
5123 .set_EA = smb2_set_ea,
5124 #endif /* CIFS_XATTR */
5125 .get_acl = get_smb2_acl,
5126 .get_acl_by_fid = get_smb2_acl_by_fid,
5127 .set_acl = set_smb2_acl,
5128 .next_header = smb2_next_header,
5129 .ioctl_query_info = smb2_ioctl_query_info,
5130 .make_node = smb2_make_node,
5131 .fiemap = smb3_fiemap,
5132 .llseek = smb3_llseek,
5133 };
5134
5135 struct smb_version_values smb20_values = {
5136 .version_string = SMB20_VERSION_STRING,
5137 .protocol_id = SMB20_PROT_ID,
5138 .req_capabilities = 0, /* MBZ */
5139 .large_lock_type = 0,
5140 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5141 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5142 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5143 .header_size = sizeof(struct smb2_sync_hdr),
5144 .header_preamble_size = 0,
5145 .max_header_size = MAX_SMB2_HDR_SIZE,
5146 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5147 .lock_cmd = SMB2_LOCK,
5148 .cap_unix = 0,
5149 .cap_nt_find = SMB2_NT_FIND,
5150 .cap_large_files = SMB2_LARGE_FILES,
5151 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5152 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5153 .create_lease_size = sizeof(struct create_lease),
5154 };
5155
5156 struct smb_version_values smb21_values = {
5157 .version_string = SMB21_VERSION_STRING,
5158 .protocol_id = SMB21_PROT_ID,
5159 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5160 .large_lock_type = 0,
5161 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5162 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5163 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5164 .header_size = sizeof(struct smb2_sync_hdr),
5165 .header_preamble_size = 0,
5166 .max_header_size = MAX_SMB2_HDR_SIZE,
5167 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5168 .lock_cmd = SMB2_LOCK,
5169 .cap_unix = 0,
5170 .cap_nt_find = SMB2_NT_FIND,
5171 .cap_large_files = SMB2_LARGE_FILES,
5172 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5173 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5174 .create_lease_size = sizeof(struct create_lease),
5175 };
5176
5177 struct smb_version_values smb3any_values = {
5178 .version_string = SMB3ANY_VERSION_STRING,
5179 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5180 .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,
5181 .large_lock_type = 0,
5182 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5183 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5184 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5185 .header_size = sizeof(struct smb2_sync_hdr),
5186 .header_preamble_size = 0,
5187 .max_header_size = MAX_SMB2_HDR_SIZE,
5188 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5189 .lock_cmd = SMB2_LOCK,
5190 .cap_unix = 0,
5191 .cap_nt_find = SMB2_NT_FIND,
5192 .cap_large_files = SMB2_LARGE_FILES,
5193 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5194 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5195 .create_lease_size = sizeof(struct create_lease_v2),
5196 };
5197
5198 struct smb_version_values smbdefault_values = {
5199 .version_string = SMBDEFAULT_VERSION_STRING,
5200 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5201 .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,
5202 .large_lock_type = 0,
5203 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5204 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5205 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5206 .header_size = sizeof(struct smb2_sync_hdr),
5207 .header_preamble_size = 0,
5208 .max_header_size = MAX_SMB2_HDR_SIZE,
5209 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5210 .lock_cmd = SMB2_LOCK,
5211 .cap_unix = 0,
5212 .cap_nt_find = SMB2_NT_FIND,
5213 .cap_large_files = SMB2_LARGE_FILES,
5214 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5215 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5216 .create_lease_size = sizeof(struct create_lease_v2),
5217 };
5218
5219 struct smb_version_values smb30_values = {
5220 .version_string = SMB30_VERSION_STRING,
5221 .protocol_id = SMB30_PROT_ID,
5222 .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,
5223 .large_lock_type = 0,
5224 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5225 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5226 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5227 .header_size = sizeof(struct smb2_sync_hdr),
5228 .header_preamble_size = 0,
5229 .max_header_size = MAX_SMB2_HDR_SIZE,
5230 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5231 .lock_cmd = SMB2_LOCK,
5232 .cap_unix = 0,
5233 .cap_nt_find = SMB2_NT_FIND,
5234 .cap_large_files = SMB2_LARGE_FILES,
5235 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5236 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5237 .create_lease_size = sizeof(struct create_lease_v2),
5238 };
5239
5240 struct smb_version_values smb302_values = {
5241 .version_string = SMB302_VERSION_STRING,
5242 .protocol_id = SMB302_PROT_ID,
5243 .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,
5244 .large_lock_type = 0,
5245 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5246 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5247 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5248 .header_size = sizeof(struct smb2_sync_hdr),
5249 .header_preamble_size = 0,
5250 .max_header_size = MAX_SMB2_HDR_SIZE,
5251 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5252 .lock_cmd = SMB2_LOCK,
5253 .cap_unix = 0,
5254 .cap_nt_find = SMB2_NT_FIND,
5255 .cap_large_files = SMB2_LARGE_FILES,
5256 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5257 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5258 .create_lease_size = sizeof(struct create_lease_v2),
5259 };
5260
5261 struct smb_version_values smb311_values = {
5262 .version_string = SMB311_VERSION_STRING,
5263 .protocol_id = SMB311_PROT_ID,
5264 .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,
5265 .large_lock_type = 0,
5266 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5267 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5268 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5269 .header_size = sizeof(struct smb2_sync_hdr),
5270 .header_preamble_size = 0,
5271 .max_header_size = MAX_SMB2_HDR_SIZE,
5272 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5273 .lock_cmd = SMB2_LOCK,
5274 .cap_unix = 0,
5275 .cap_nt_find = SMB2_NT_FIND,
5276 .cap_large_files = SMB2_LARGE_FILES,
5277 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5278 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5279 .create_lease_size = sizeof(struct create_lease_v2),
5280 };
Linux with added FPC-III support