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
change_conf(struct TCP_Server_Info * server)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
smb2_add_credits(struct TCP_Server_Info * server,const struct cifs_credits * credits,const int optype)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, add);
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 trace_smb3_add_credits(server->CurrentMid,
125 server->hostname, rc, add);
126 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
127 }
128 }
129
130 static void
smb2_set_credits(struct TCP_Server_Info * server,const int val)131 smb2_set_credits(struct TCP_Server_Info *server, const int val)
132 {
133 spin_lock(&server->req_lock);
134 server->credits = val;
135 if (val == 1)
136 server->reconnect_instance++;
137 spin_unlock(&server->req_lock);
138 /* don't log while holding the lock */
139 if (val == 1)
140 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
141 }
142
143 static int *
smb2_get_credits_field(struct TCP_Server_Info * server,const int optype)144 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
145 {
146 switch (optype) {
147 case CIFS_ECHO_OP:
148 return &server->echo_credits;
149 case CIFS_OBREAK_OP:
150 return &server->oplock_credits;
151 default:
152 return &server->credits;
153 }
154 }
155
156 static unsigned int
smb2_get_credits(struct mid_q_entry * mid)157 smb2_get_credits(struct mid_q_entry *mid)
158 {
159 return mid->credits_received;
160 }
161
162 static int
smb2_wait_mtu_credits(struct TCP_Server_Info * server,unsigned int size,unsigned int * num,struct cifs_credits * credits)163 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
164 unsigned int *num, struct cifs_credits *credits)
165 {
166 int rc = 0;
167 unsigned int scredits;
168
169 spin_lock(&server->req_lock);
170 while (1) {
171 if (server->credits <= 0) {
172 spin_unlock(&server->req_lock);
173 cifs_num_waiters_inc(server);
174 rc = wait_event_killable(server->request_q,
175 has_credits(server, &server->credits, 1));
176 cifs_num_waiters_dec(server);
177 if (rc)
178 return rc;
179 spin_lock(&server->req_lock);
180 } else {
181 if (server->tcpStatus == CifsExiting) {
182 spin_unlock(&server->req_lock);
183 return -ENOENT;
184 }
185
186 scredits = server->credits;
187 /* can deadlock with reopen */
188 if (scredits <= 8) {
189 *num = SMB2_MAX_BUFFER_SIZE;
190 credits->value = 0;
191 credits->instance = 0;
192 break;
193 }
194
195 /* leave some credits for reopen and other ops */
196 scredits -= 8;
197 *num = min_t(unsigned int, size,
198 scredits * SMB2_MAX_BUFFER_SIZE);
199
200 credits->value =
201 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
202 credits->instance = server->reconnect_instance;
203 server->credits -= credits->value;
204 server->in_flight++;
205 if (server->in_flight > server->max_in_flight)
206 server->max_in_flight = server->in_flight;
207 break;
208 }
209 }
210 spin_unlock(&server->req_lock);
211 return rc;
212 }
213
214 static int
smb2_adjust_credits(struct TCP_Server_Info * server,struct cifs_credits * credits,const unsigned int payload_size)215 smb2_adjust_credits(struct TCP_Server_Info *server,
216 struct cifs_credits *credits,
217 const unsigned int payload_size)
218 {
219 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
220
221 if (!credits->value || credits->value == new_val)
222 return 0;
223
224 if (credits->value < new_val) {
225 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
226 credits->value, new_val);
227 return -ENOTSUPP;
228 }
229
230 spin_lock(&server->req_lock);
231
232 if (server->reconnect_instance != credits->instance) {
233 spin_unlock(&server->req_lock);
234 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
235 credits->value - new_val);
236 return -EAGAIN;
237 }
238
239 server->credits += credits->value - new_val;
240 spin_unlock(&server->req_lock);
241 wake_up(&server->request_q);
242 credits->value = new_val;
243 return 0;
244 }
245
246 static __u64
smb2_get_next_mid(struct TCP_Server_Info * server)247 smb2_get_next_mid(struct TCP_Server_Info *server)
248 {
249 __u64 mid;
250 /* for SMB2 we need the current value */
251 spin_lock(&GlobalMid_Lock);
252 mid = server->CurrentMid++;
253 spin_unlock(&GlobalMid_Lock);
254 return mid;
255 }
256
257 static void
smb2_revert_current_mid(struct TCP_Server_Info * server,const unsigned int val)258 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
259 {
260 spin_lock(&GlobalMid_Lock);
261 if (server->CurrentMid >= val)
262 server->CurrentMid -= val;
263 spin_unlock(&GlobalMid_Lock);
264 }
265
266 static struct mid_q_entry *
__smb2_find_mid(struct TCP_Server_Info * server,char * buf,bool dequeue)267 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
268 {
269 struct mid_q_entry *mid;
270 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
271 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
272
273 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
274 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
275 return NULL;
276 }
277
278 spin_lock(&GlobalMid_Lock);
279 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
280 if ((mid->mid == wire_mid) &&
281 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
282 (mid->command == shdr->Command)) {
283 kref_get(&mid->refcount);
284 if (dequeue) {
285 list_del_init(&mid->qhead);
286 mid->mid_flags |= MID_DELETED;
287 }
288 spin_unlock(&GlobalMid_Lock);
289 return mid;
290 }
291 }
292 spin_unlock(&GlobalMid_Lock);
293 return NULL;
294 }
295
296 static struct mid_q_entry *
smb2_find_mid(struct TCP_Server_Info * server,char * buf)297 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
298 {
299 return __smb2_find_mid(server, buf, false);
300 }
301
302 static struct mid_q_entry *
smb2_find_dequeue_mid(struct TCP_Server_Info * server,char * buf)303 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
304 {
305 return __smb2_find_mid(server, buf, true);
306 }
307
308 static void
smb2_dump_detail(void * buf,struct TCP_Server_Info * server)309 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
310 {
311 #ifdef CONFIG_CIFS_DEBUG2
312 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
313
314 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
315 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
316 shdr->ProcessId);
317 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
318 server->ops->calc_smb_size(buf, server));
319 #endif
320 }
321
322 static bool
smb2_need_neg(struct TCP_Server_Info * server)323 smb2_need_neg(struct TCP_Server_Info *server)
324 {
325 return server->max_read == 0;
326 }
327
328 static int
smb2_negotiate(const unsigned int xid,struct cifs_ses * ses)329 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
330 {
331 int rc;
332
333 cifs_ses_server(ses)->CurrentMid = 0;
334 rc = SMB2_negotiate(xid, ses);
335 /* BB we probably don't need to retry with modern servers */
336 if (rc == -EAGAIN)
337 rc = -EHOSTDOWN;
338 return rc;
339 }
340
341 static unsigned int
smb2_negotiate_wsize(struct cifs_tcon * tcon,struct smb_vol * volume_info)342 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
343 {
344 struct TCP_Server_Info *server = tcon->ses->server;
345 unsigned int wsize;
346
347 /* start with specified wsize, or default */
348 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
349 wsize = min_t(unsigned int, wsize, server->max_write);
350 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
351 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
352
353 return wsize;
354 }
355
356 static unsigned int
smb3_negotiate_wsize(struct cifs_tcon * tcon,struct smb_vol * volume_info)357 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
358 {
359 struct TCP_Server_Info *server = tcon->ses->server;
360 unsigned int wsize;
361
362 /* start with specified wsize, or default */
363 wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
364 wsize = min_t(unsigned int, wsize, server->max_write);
365 #ifdef CONFIG_CIFS_SMB_DIRECT
366 if (server->rdma) {
367 if (server->sign)
368 /*
369 * Account for SMB2 data transfer packet header and
370 * possible encryption header
371 */
372 wsize = min_t(unsigned int,
373 wsize,
374 server->smbd_conn->max_fragmented_send_size -
375 SMB2_READWRITE_PDU_HEADER_SIZE -
376 sizeof(struct smb2_transform_hdr));
377 else
378 wsize = min_t(unsigned int,
379 wsize, server->smbd_conn->max_readwrite_size);
380 }
381 #endif
382 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
383 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
384
385 return wsize;
386 }
387
388 static unsigned int
smb2_negotiate_rsize(struct cifs_tcon * tcon,struct smb_vol * volume_info)389 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
390 {
391 struct TCP_Server_Info *server = tcon->ses->server;
392 unsigned int rsize;
393
394 /* start with specified rsize, or default */
395 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
396 rsize = min_t(unsigned int, rsize, server->max_read);
397
398 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
399 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
400
401 return rsize;
402 }
403
404 static unsigned int
smb3_negotiate_rsize(struct cifs_tcon * tcon,struct smb_vol * volume_info)405 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
406 {
407 struct TCP_Server_Info *server = tcon->ses->server;
408 unsigned int rsize;
409
410 /* start with specified rsize, or default */
411 rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
412 rsize = min_t(unsigned int, rsize, server->max_read);
413 #ifdef CONFIG_CIFS_SMB_DIRECT
414 if (server->rdma) {
415 if (server->sign)
416 /*
417 * Account for SMB2 data transfer packet header and
418 * possible encryption header
419 */
420 rsize = min_t(unsigned int,
421 rsize,
422 server->smbd_conn->max_fragmented_recv_size -
423 SMB2_READWRITE_PDU_HEADER_SIZE -
424 sizeof(struct smb2_transform_hdr));
425 else
426 rsize = min_t(unsigned int,
427 rsize, server->smbd_conn->max_readwrite_size);
428 }
429 #endif
430
431 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
432 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
433
434 return rsize;
435 }
436
437 static int
parse_server_interfaces(struct network_interface_info_ioctl_rsp * buf,size_t buf_len,struct cifs_server_iface ** iface_list,size_t * iface_count)438 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
439 size_t buf_len,
440 struct cifs_server_iface **iface_list,
441 size_t *iface_count)
442 {
443 struct network_interface_info_ioctl_rsp *p;
444 struct sockaddr_in *addr4;
445 struct sockaddr_in6 *addr6;
446 struct iface_info_ipv4 *p4;
447 struct iface_info_ipv6 *p6;
448 struct cifs_server_iface *info;
449 ssize_t bytes_left;
450 size_t next = 0;
451 int nb_iface = 0;
452 int rc = 0;
453
454 *iface_list = NULL;
455 *iface_count = 0;
456
457 /*
458 * Fist pass: count and sanity check
459 */
460
461 bytes_left = buf_len;
462 p = buf;
463 while (bytes_left >= sizeof(*p)) {
464 nb_iface++;
465 next = le32_to_cpu(p->Next);
466 if (!next) {
467 bytes_left -= sizeof(*p);
468 break;
469 }
470 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
471 bytes_left -= next;
472 }
473
474 if (!nb_iface) {
475 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
476 rc = -EINVAL;
477 goto out;
478 }
479
480 /* Azure rounds the buffer size up 8, to a 16 byte boundary */
481 if ((bytes_left > 8) || p->Next)
482 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
483
484
485 /*
486 * Second pass: extract info to internal structure
487 */
488
489 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
490 if (!*iface_list) {
491 rc = -ENOMEM;
492 goto out;
493 }
494
495 info = *iface_list;
496 bytes_left = buf_len;
497 p = buf;
498 while (bytes_left >= sizeof(*p)) {
499 info->speed = le64_to_cpu(p->LinkSpeed);
500 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
501 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
502
503 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
504 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
505 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
506 le32_to_cpu(p->Capability));
507
508 switch (p->Family) {
509 /*
510 * The kernel and wire socket structures have the same
511 * layout and use network byte order but make the
512 * conversion explicit in case either one changes.
513 */
514 case INTERNETWORK:
515 addr4 = (struct sockaddr_in *)&info->sockaddr;
516 p4 = (struct iface_info_ipv4 *)p->Buffer;
517 addr4->sin_family = AF_INET;
518 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
519
520 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
521 addr4->sin_port = cpu_to_be16(CIFS_PORT);
522
523 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
524 &addr4->sin_addr);
525 break;
526 case INTERNETWORKV6:
527 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
528 p6 = (struct iface_info_ipv6 *)p->Buffer;
529 addr6->sin6_family = AF_INET6;
530 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
531
532 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
533 addr6->sin6_flowinfo = 0;
534 addr6->sin6_scope_id = 0;
535 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
536
537 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
538 &addr6->sin6_addr);
539 break;
540 default:
541 cifs_dbg(VFS,
542 "%s: skipping unsupported socket family\n",
543 __func__);
544 goto next_iface;
545 }
546
547 (*iface_count)++;
548 info++;
549 next_iface:
550 next = le32_to_cpu(p->Next);
551 if (!next)
552 break;
553 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
554 bytes_left -= next;
555 }
556
557 if (!*iface_count) {
558 rc = -EINVAL;
559 goto out;
560 }
561
562 out:
563 if (rc) {
564 kfree(*iface_list);
565 *iface_count = 0;
566 *iface_list = NULL;
567 }
568 return rc;
569 }
570
compare_iface(const void * ia,const void * ib)571 static int compare_iface(const void *ia, const void *ib)
572 {
573 const struct cifs_server_iface *a = (struct cifs_server_iface *)ia;
574 const struct cifs_server_iface *b = (struct cifs_server_iface *)ib;
575
576 return a->speed == b->speed ? 0 : (a->speed > b->speed ? -1 : 1);
577 }
578
579 static int
SMB3_request_interfaces(const unsigned int xid,struct cifs_tcon * tcon)580 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
581 {
582 int rc;
583 unsigned int ret_data_len = 0;
584 struct network_interface_info_ioctl_rsp *out_buf = NULL;
585 struct cifs_server_iface *iface_list;
586 size_t iface_count;
587 struct cifs_ses *ses = tcon->ses;
588
589 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
590 FSCTL_QUERY_NETWORK_INTERFACE_INFO,
591 NULL /* no data input */, 0 /* no data input */,
592 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
593 if (rc == -EOPNOTSUPP) {
594 cifs_dbg(FYI,
595 "server does not support query network interfaces\n");
596 goto out;
597 } else if (rc != 0) {
598 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
599 goto out;
600 }
601
602 rc = parse_server_interfaces(out_buf, ret_data_len,
603 &iface_list, &iface_count);
604 if (rc)
605 goto out;
606
607 /* sort interfaces from fastest to slowest */
608 sort(iface_list, iface_count, sizeof(*iface_list), compare_iface, NULL);
609
610 spin_lock(&ses->iface_lock);
611 kfree(ses->iface_list);
612 ses->iface_list = iface_list;
613 ses->iface_count = iface_count;
614 ses->iface_last_update = jiffies;
615 spin_unlock(&ses->iface_lock);
616
617 out:
618 kfree(out_buf);
619 return rc;
620 }
621
622 static void
smb2_close_cached_fid(struct kref * ref)623 smb2_close_cached_fid(struct kref *ref)
624 {
625 struct cached_fid *cfid = container_of(ref, struct cached_fid,
626 refcount);
627
628 if (cfid->is_valid) {
629 cifs_dbg(FYI, "clear cached root file handle\n");
630 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
631 cfid->fid->volatile_fid);
632 cfid->is_valid = false;
633 cfid->file_all_info_is_valid = false;
634 cfid->has_lease = false;
635 }
636 }
637
close_shroot(struct cached_fid * cfid)638 void close_shroot(struct cached_fid *cfid)
639 {
640 mutex_lock(&cfid->fid_mutex);
641 kref_put(&cfid->refcount, smb2_close_cached_fid);
642 mutex_unlock(&cfid->fid_mutex);
643 }
644
close_shroot_lease_locked(struct cached_fid * cfid)645 void close_shroot_lease_locked(struct cached_fid *cfid)
646 {
647 if (cfid->has_lease) {
648 cfid->has_lease = false;
649 kref_put(&cfid->refcount, smb2_close_cached_fid);
650 }
651 }
652
close_shroot_lease(struct cached_fid * cfid)653 void close_shroot_lease(struct cached_fid *cfid)
654 {
655 mutex_lock(&cfid->fid_mutex);
656 close_shroot_lease_locked(cfid);
657 mutex_unlock(&cfid->fid_mutex);
658 }
659
660 void
smb2_cached_lease_break(struct work_struct * work)661 smb2_cached_lease_break(struct work_struct *work)
662 {
663 struct cached_fid *cfid = container_of(work,
664 struct cached_fid, lease_break);
665
666 close_shroot_lease(cfid);
667 }
668
669 /*
670 * Open the directory at the root of a share
671 */
open_shroot(unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct cached_fid ** cfid)672 int open_shroot(unsigned int xid, struct cifs_tcon *tcon,
673 struct cifs_sb_info *cifs_sb,
674 struct cached_fid **cfid)
675 {
676 struct cifs_ses *ses = tcon->ses;
677 struct TCP_Server_Info *server = ses->server;
678 struct cifs_open_parms oparms;
679 struct smb2_create_rsp *o_rsp = NULL;
680 struct smb2_query_info_rsp *qi_rsp = NULL;
681 int resp_buftype[2];
682 struct smb_rqst rqst[2];
683 struct kvec rsp_iov[2];
684 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
685 struct kvec qi_iov[1];
686 int rc, flags = 0;
687 __le16 utf16_path = 0; /* Null - since an open of top of share */
688 u8 oplock = SMB2_OPLOCK_LEVEL_II;
689 struct cifs_fid *pfid;
690
691 mutex_lock(&tcon->crfid.fid_mutex);
692 if (tcon->crfid.is_valid) {
693 cifs_dbg(FYI, "found a cached root file handle\n");
694 *cfid = &tcon->crfid;
695 kref_get(&tcon->crfid.refcount);
696 mutex_unlock(&tcon->crfid.fid_mutex);
697 return 0;
698 }
699
700 /*
701 * We do not hold the lock for the open because in case
702 * SMB2_open needs to reconnect, it will end up calling
703 * cifs_mark_open_files_invalid() which takes the lock again
704 * thus causing a deadlock
705 */
706
707 mutex_unlock(&tcon->crfid.fid_mutex);
708
709 if (smb3_encryption_required(tcon))
710 flags |= CIFS_TRANSFORM_REQ;
711
712 if (!server->ops->new_lease_key)
713 return -EIO;
714
715 pfid = tcon->crfid.fid;
716 server->ops->new_lease_key(pfid);
717
718 memset(rqst, 0, sizeof(rqst));
719 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
720 memset(rsp_iov, 0, sizeof(rsp_iov));
721
722 /* Open */
723 memset(&open_iov, 0, sizeof(open_iov));
724 rqst[0].rq_iov = open_iov;
725 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
726
727 oparms.tcon = tcon;
728 oparms.create_options = cifs_create_options(cifs_sb, 0);
729 oparms.desired_access = FILE_READ_ATTRIBUTES;
730 oparms.disposition = FILE_OPEN;
731 oparms.fid = pfid;
732 oparms.reconnect = false;
733
734 rc = SMB2_open_init(tcon, server,
735 &rqst[0], &oplock, &oparms, &utf16_path);
736 if (rc)
737 goto oshr_free;
738 smb2_set_next_command(tcon, &rqst[0]);
739
740 memset(&qi_iov, 0, sizeof(qi_iov));
741 rqst[1].rq_iov = qi_iov;
742 rqst[1].rq_nvec = 1;
743
744 rc = SMB2_query_info_init(tcon, server,
745 &rqst[1], COMPOUND_FID,
746 COMPOUND_FID, FILE_ALL_INFORMATION,
747 SMB2_O_INFO_FILE, 0,
748 sizeof(struct smb2_file_all_info) +
749 PATH_MAX * 2, 0, NULL);
750 if (rc)
751 goto oshr_free;
752
753 smb2_set_related(&rqst[1]);
754
755 rc = compound_send_recv(xid, ses, server,
756 flags, 2, rqst,
757 resp_buftype, rsp_iov);
758 mutex_lock(&tcon->crfid.fid_mutex);
759
760 /*
761 * Now we need to check again as the cached root might have
762 * been successfully re-opened from a concurrent process
763 */
764
765 if (tcon->crfid.is_valid) {
766 /* work was already done */
767
768 /* stash fids for close() later */
769 struct cifs_fid fid = {
770 .persistent_fid = pfid->persistent_fid,
771 .volatile_fid = pfid->volatile_fid,
772 };
773
774 /*
775 * caller expects this func to set pfid to a valid
776 * cached root, so we copy the existing one and get a
777 * reference.
778 */
779 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
780 kref_get(&tcon->crfid.refcount);
781
782 mutex_unlock(&tcon->crfid.fid_mutex);
783
784 if (rc == 0) {
785 /* close extra handle outside of crit sec */
786 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
787 }
788 rc = 0;
789 goto oshr_free;
790 }
791
792 /* Cached root is still invalid, continue normaly */
793
794 if (rc) {
795 if (rc == -EREMCHG) {
796 tcon->need_reconnect = true;
797 pr_warn_once("server share %s deleted\n",
798 tcon->treeName);
799 }
800 goto oshr_exit;
801 }
802
803 atomic_inc(&tcon->num_remote_opens);
804
805 o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
806 oparms.fid->persistent_fid = o_rsp->PersistentFileId;
807 oparms.fid->volatile_fid = o_rsp->VolatileFileId;
808 #ifdef CONFIG_CIFS_DEBUG2
809 oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
810 #endif /* CIFS_DEBUG2 */
811
812 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
813 tcon->crfid.tcon = tcon;
814 tcon->crfid.is_valid = true;
815 kref_init(&tcon->crfid.refcount);
816
817 /* BB TBD check to see if oplock level check can be removed below */
818 if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
819 kref_get(&tcon->crfid.refcount);
820 tcon->crfid.has_lease = true;
821 smb2_parse_contexts(server, o_rsp,
822 &oparms.fid->epoch,
823 oparms.fid->lease_key, &oplock,
824 NULL, NULL);
825 } else
826 goto oshr_exit;
827
828 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
829 if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
830 goto oshr_exit;
831 if (!smb2_validate_and_copy_iov(
832 le16_to_cpu(qi_rsp->OutputBufferOffset),
833 sizeof(struct smb2_file_all_info),
834 &rsp_iov[1], sizeof(struct smb2_file_all_info),
835 (char *)&tcon->crfid.file_all_info))
836 tcon->crfid.file_all_info_is_valid = true;
837
838 oshr_exit:
839 mutex_unlock(&tcon->crfid.fid_mutex);
840 oshr_free:
841 SMB2_open_free(&rqst[0]);
842 SMB2_query_info_free(&rqst[1]);
843 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
844 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
845 if (rc == 0)
846 *cfid = &tcon->crfid;
847 return rc;
848 }
849
850 static void
smb3_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)851 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
852 struct cifs_sb_info *cifs_sb)
853 {
854 int rc;
855 __le16 srch_path = 0; /* Null - open root of share */
856 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
857 struct cifs_open_parms oparms;
858 struct cifs_fid fid;
859 bool no_cached_open = tcon->nohandlecache;
860 struct cached_fid *cfid = NULL;
861
862 oparms.tcon = tcon;
863 oparms.desired_access = FILE_READ_ATTRIBUTES;
864 oparms.disposition = FILE_OPEN;
865 oparms.create_options = cifs_create_options(cifs_sb, 0);
866 oparms.fid = &fid;
867 oparms.reconnect = false;
868
869 if (no_cached_open) {
870 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
871 NULL, NULL);
872 } else {
873 rc = open_shroot(xid, tcon, cifs_sb, &cfid);
874 if (rc == 0)
875 memcpy(&fid, cfid->fid, sizeof(struct cifs_fid));
876 }
877 if (rc)
878 return;
879
880 SMB3_request_interfaces(xid, tcon);
881
882 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
883 FS_ATTRIBUTE_INFORMATION);
884 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
885 FS_DEVICE_INFORMATION);
886 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
887 FS_VOLUME_INFORMATION);
888 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
889 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
890 if (no_cached_open)
891 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
892 else
893 close_shroot(cfid);
894 }
895
896 static void
smb2_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)897 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
898 struct cifs_sb_info *cifs_sb)
899 {
900 int rc;
901 __le16 srch_path = 0; /* Null - open root of share */
902 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
903 struct cifs_open_parms oparms;
904 struct cifs_fid fid;
905
906 oparms.tcon = tcon;
907 oparms.desired_access = FILE_READ_ATTRIBUTES;
908 oparms.disposition = FILE_OPEN;
909 oparms.create_options = cifs_create_options(cifs_sb, 0);
910 oparms.fid = &fid;
911 oparms.reconnect = false;
912
913 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
914 NULL, NULL);
915 if (rc)
916 return;
917
918 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
919 FS_ATTRIBUTE_INFORMATION);
920 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
921 FS_DEVICE_INFORMATION);
922 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
923 }
924
925 static int
smb2_is_path_accessible(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path)926 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
927 struct cifs_sb_info *cifs_sb, const char *full_path)
928 {
929 int rc;
930 __le16 *utf16_path;
931 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
932 struct cifs_open_parms oparms;
933 struct cifs_fid fid;
934
935 if ((*full_path == 0) && tcon->crfid.is_valid)
936 return 0;
937
938 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
939 if (!utf16_path)
940 return -ENOMEM;
941
942 oparms.tcon = tcon;
943 oparms.desired_access = FILE_READ_ATTRIBUTES;
944 oparms.disposition = FILE_OPEN;
945 oparms.create_options = cifs_create_options(cifs_sb, 0);
946 oparms.fid = &fid;
947 oparms.reconnect = false;
948
949 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
950 NULL);
951 if (rc) {
952 kfree(utf16_path);
953 return rc;
954 }
955
956 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
957 kfree(utf16_path);
958 return rc;
959 }
960
961 static int
smb2_get_srv_inum(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,u64 * uniqueid,FILE_ALL_INFO * data)962 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
963 struct cifs_sb_info *cifs_sb, const char *full_path,
964 u64 *uniqueid, FILE_ALL_INFO *data)
965 {
966 *uniqueid = le64_to_cpu(data->IndexNumber);
967 return 0;
968 }
969
970 static int
smb2_query_file_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid,FILE_ALL_INFO * data)971 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
972 struct cifs_fid *fid, FILE_ALL_INFO *data)
973 {
974 int rc;
975 struct smb2_file_all_info *smb2_data;
976
977 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
978 GFP_KERNEL);
979 if (smb2_data == NULL)
980 return -ENOMEM;
981
982 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
983 smb2_data);
984 if (!rc)
985 move_smb2_info_to_cifs(data, smb2_data);
986 kfree(smb2_data);
987 return rc;
988 }
989
990 #ifdef CONFIG_CIFS_XATTR
991 static ssize_t
move_smb2_ea_to_cifs(char * dst,size_t dst_size,struct smb2_file_full_ea_info * src,size_t src_size,const unsigned char * ea_name)992 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
993 struct smb2_file_full_ea_info *src, size_t src_size,
994 const unsigned char *ea_name)
995 {
996 int rc = 0;
997 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
998 char *name, *value;
999 size_t buf_size = dst_size;
1000 size_t name_len, value_len, user_name_len;
1001
1002 while (src_size > 0) {
1003 name_len = (size_t)src->ea_name_length;
1004 value_len = (size_t)le16_to_cpu(src->ea_value_length);
1005
1006 if (name_len == 0)
1007 break;
1008
1009 if (src_size < 8 + name_len + 1 + value_len) {
1010 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
1011 rc = -EIO;
1012 goto out;
1013 }
1014
1015 name = &src->ea_data[0];
1016 value = &src->ea_data[src->ea_name_length + 1];
1017
1018 if (ea_name) {
1019 if (ea_name_len == name_len &&
1020 memcmp(ea_name, name, name_len) == 0) {
1021 rc = value_len;
1022 if (dst_size == 0)
1023 goto out;
1024 if (dst_size < value_len) {
1025 rc = -ERANGE;
1026 goto out;
1027 }
1028 memcpy(dst, value, value_len);
1029 goto out;
1030 }
1031 } else {
1032 /* 'user.' plus a terminating null */
1033 user_name_len = 5 + 1 + name_len;
1034
1035 if (buf_size == 0) {
1036 /* skip copy - calc size only */
1037 rc += user_name_len;
1038 } else if (dst_size >= user_name_len) {
1039 dst_size -= user_name_len;
1040 memcpy(dst, "user.", 5);
1041 dst += 5;
1042 memcpy(dst, src->ea_data, name_len);
1043 dst += name_len;
1044 *dst = 0;
1045 ++dst;
1046 rc += user_name_len;
1047 } else {
1048 /* stop before overrun buffer */
1049 rc = -ERANGE;
1050 break;
1051 }
1052 }
1053
1054 if (!src->next_entry_offset)
1055 break;
1056
1057 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1058 /* stop before overrun buffer */
1059 rc = -ERANGE;
1060 break;
1061 }
1062 src_size -= le32_to_cpu(src->next_entry_offset);
1063 src = (void *)((char *)src +
1064 le32_to_cpu(src->next_entry_offset));
1065 }
1066
1067 /* didn't find the named attribute */
1068 if (ea_name)
1069 rc = -ENODATA;
1070
1071 out:
1072 return (ssize_t)rc;
1073 }
1074
1075 static ssize_t
smb2_query_eas(const unsigned int xid,struct cifs_tcon * tcon,const unsigned char * path,const unsigned char * ea_name,char * ea_data,size_t buf_size,struct cifs_sb_info * cifs_sb)1076 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1077 const unsigned char *path, const unsigned char *ea_name,
1078 char *ea_data, size_t buf_size,
1079 struct cifs_sb_info *cifs_sb)
1080 {
1081 int rc;
1082 __le16 *utf16_path;
1083 struct kvec rsp_iov = {NULL, 0};
1084 int buftype = CIFS_NO_BUFFER;
1085 struct smb2_query_info_rsp *rsp;
1086 struct smb2_file_full_ea_info *info = NULL;
1087
1088 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1089 if (!utf16_path)
1090 return -ENOMEM;
1091
1092 rc = smb2_query_info_compound(xid, tcon, utf16_path,
1093 FILE_READ_EA,
1094 FILE_FULL_EA_INFORMATION,
1095 SMB2_O_INFO_FILE,
1096 CIFSMaxBufSize -
1097 MAX_SMB2_CREATE_RESPONSE_SIZE -
1098 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1099 &rsp_iov, &buftype, cifs_sb);
1100 if (rc) {
1101 /*
1102 * If ea_name is NULL (listxattr) and there are no EAs,
1103 * return 0 as it's not an error. Otherwise, the specified
1104 * ea_name was not found.
1105 */
1106 if (!ea_name && rc == -ENODATA)
1107 rc = 0;
1108 goto qeas_exit;
1109 }
1110
1111 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1112 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1113 le32_to_cpu(rsp->OutputBufferLength),
1114 &rsp_iov,
1115 sizeof(struct smb2_file_full_ea_info));
1116 if (rc)
1117 goto qeas_exit;
1118
1119 info = (struct smb2_file_full_ea_info *)(
1120 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1121 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1122 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1123
1124 qeas_exit:
1125 kfree(utf16_path);
1126 free_rsp_buf(buftype, rsp_iov.iov_base);
1127 return rc;
1128 }
1129
1130
1131 static int
smb2_set_ea(const unsigned int xid,struct cifs_tcon * tcon,const char * path,const char * ea_name,const void * ea_value,const __u16 ea_value_len,const struct nls_table * nls_codepage,struct cifs_sb_info * cifs_sb)1132 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1133 const char *path, const char *ea_name, const void *ea_value,
1134 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1135 struct cifs_sb_info *cifs_sb)
1136 {
1137 struct cifs_ses *ses = tcon->ses;
1138 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1139 __le16 *utf16_path = NULL;
1140 int ea_name_len = strlen(ea_name);
1141 int flags = CIFS_CP_CREATE_CLOSE_OP;
1142 int len;
1143 struct smb_rqst rqst[3];
1144 int resp_buftype[3];
1145 struct kvec rsp_iov[3];
1146 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1147 struct cifs_open_parms oparms;
1148 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1149 struct cifs_fid fid;
1150 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1151 unsigned int size[1];
1152 void *data[1];
1153 struct smb2_file_full_ea_info *ea = NULL;
1154 struct kvec close_iov[1];
1155 struct smb2_query_info_rsp *rsp;
1156 int rc, used_len = 0;
1157
1158 if (smb3_encryption_required(tcon))
1159 flags |= CIFS_TRANSFORM_REQ;
1160
1161 if (ea_name_len > 255)
1162 return -EINVAL;
1163
1164 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1165 if (!utf16_path)
1166 return -ENOMEM;
1167
1168 memset(rqst, 0, sizeof(rqst));
1169 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1170 memset(rsp_iov, 0, sizeof(rsp_iov));
1171
1172 if (ses->server->ops->query_all_EAs) {
1173 if (!ea_value) {
1174 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1175 ea_name, NULL, 0,
1176 cifs_sb);
1177 if (rc == -ENODATA)
1178 goto sea_exit;
1179 } else {
1180 /* If we are adding a attribute we should first check
1181 * if there will be enough space available to store
1182 * the new EA. If not we should not add it since we
1183 * would not be able to even read the EAs back.
1184 */
1185 rc = smb2_query_info_compound(xid, tcon, utf16_path,
1186 FILE_READ_EA,
1187 FILE_FULL_EA_INFORMATION,
1188 SMB2_O_INFO_FILE,
1189 CIFSMaxBufSize -
1190 MAX_SMB2_CREATE_RESPONSE_SIZE -
1191 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1192 &rsp_iov[1], &resp_buftype[1], cifs_sb);
1193 if (rc == 0) {
1194 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1195 used_len = le32_to_cpu(rsp->OutputBufferLength);
1196 }
1197 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1198 resp_buftype[1] = CIFS_NO_BUFFER;
1199 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1200 rc = 0;
1201
1202 /* Use a fudge factor of 256 bytes in case we collide
1203 * with a different set_EAs command.
1204 */
1205 if(CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1206 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1207 used_len + ea_name_len + ea_value_len + 1) {
1208 rc = -ENOSPC;
1209 goto sea_exit;
1210 }
1211 }
1212 }
1213
1214 /* Open */
1215 memset(&open_iov, 0, sizeof(open_iov));
1216 rqst[0].rq_iov = open_iov;
1217 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1218
1219 memset(&oparms, 0, sizeof(oparms));
1220 oparms.tcon = tcon;
1221 oparms.desired_access = FILE_WRITE_EA;
1222 oparms.disposition = FILE_OPEN;
1223 oparms.create_options = cifs_create_options(cifs_sb, 0);
1224 oparms.fid = &fid;
1225 oparms.reconnect = false;
1226
1227 rc = SMB2_open_init(tcon, server,
1228 &rqst[0], &oplock, &oparms, utf16_path);
1229 if (rc)
1230 goto sea_exit;
1231 smb2_set_next_command(tcon, &rqst[0]);
1232
1233
1234 /* Set Info */
1235 memset(&si_iov, 0, sizeof(si_iov));
1236 rqst[1].rq_iov = si_iov;
1237 rqst[1].rq_nvec = 1;
1238
1239 len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1240 ea = kzalloc(len, GFP_KERNEL);
1241 if (ea == NULL) {
1242 rc = -ENOMEM;
1243 goto sea_exit;
1244 }
1245
1246 ea->ea_name_length = ea_name_len;
1247 ea->ea_value_length = cpu_to_le16(ea_value_len);
1248 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1249 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1250
1251 size[0] = len;
1252 data[0] = ea;
1253
1254 rc = SMB2_set_info_init(tcon, server,
1255 &rqst[1], COMPOUND_FID,
1256 COMPOUND_FID, current->tgid,
1257 FILE_FULL_EA_INFORMATION,
1258 SMB2_O_INFO_FILE, 0, data, size);
1259 if (rc)
1260 goto sea_exit;
1261 smb2_set_next_command(tcon, &rqst[1]);
1262 smb2_set_related(&rqst[1]);
1263
1264
1265 /* Close */
1266 memset(&close_iov, 0, sizeof(close_iov));
1267 rqst[2].rq_iov = close_iov;
1268 rqst[2].rq_nvec = 1;
1269 rc = SMB2_close_init(tcon, server,
1270 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1271 if (rc)
1272 goto sea_exit;
1273 smb2_set_related(&rqst[2]);
1274
1275 rc = compound_send_recv(xid, ses, server,
1276 flags, 3, rqst,
1277 resp_buftype, rsp_iov);
1278 /* no need to bump num_remote_opens because handle immediately closed */
1279
1280 sea_exit:
1281 kfree(ea);
1282 kfree(utf16_path);
1283 SMB2_open_free(&rqst[0]);
1284 SMB2_set_info_free(&rqst[1]);
1285 SMB2_close_free(&rqst[2]);
1286 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1287 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1288 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1289 return rc;
1290 }
1291 #endif
1292
1293 static bool
smb2_can_echo(struct TCP_Server_Info * server)1294 smb2_can_echo(struct TCP_Server_Info *server)
1295 {
1296 return server->echoes;
1297 }
1298
1299 static void
smb2_clear_stats(struct cifs_tcon * tcon)1300 smb2_clear_stats(struct cifs_tcon *tcon)
1301 {
1302 int i;
1303
1304 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1305 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1306 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1307 }
1308 }
1309
1310 static void
smb2_dump_share_caps(struct seq_file * m,struct cifs_tcon * tcon)1311 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1312 {
1313 seq_puts(m, "\n\tShare Capabilities:");
1314 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1315 seq_puts(m, " DFS,");
1316 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1317 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1318 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1319 seq_puts(m, " SCALEOUT,");
1320 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1321 seq_puts(m, " CLUSTER,");
1322 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1323 seq_puts(m, " ASYMMETRIC,");
1324 if (tcon->capabilities == 0)
1325 seq_puts(m, " None");
1326 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1327 seq_puts(m, " Aligned,");
1328 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1329 seq_puts(m, " Partition Aligned,");
1330 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1331 seq_puts(m, " SSD,");
1332 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1333 seq_puts(m, " TRIM-support,");
1334
1335 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1336 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1337 if (tcon->perf_sector_size)
1338 seq_printf(m, "\tOptimal sector size: 0x%x",
1339 tcon->perf_sector_size);
1340 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1341 }
1342
1343 static void
smb2_print_stats(struct seq_file * m,struct cifs_tcon * tcon)1344 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1345 {
1346 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1347 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1348
1349 /*
1350 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1351 * totals (requests sent) since those SMBs are per-session not per tcon
1352 */
1353 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1354 (long long)(tcon->bytes_read),
1355 (long long)(tcon->bytes_written));
1356 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1357 atomic_read(&tcon->num_local_opens),
1358 atomic_read(&tcon->num_remote_opens));
1359 seq_printf(m, "\nTreeConnects: %d total %d failed",
1360 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1361 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1362 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1363 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1364 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1365 seq_printf(m, "\nCreates: %d total %d failed",
1366 atomic_read(&sent[SMB2_CREATE_HE]),
1367 atomic_read(&failed[SMB2_CREATE_HE]));
1368 seq_printf(m, "\nCloses: %d total %d failed",
1369 atomic_read(&sent[SMB2_CLOSE_HE]),
1370 atomic_read(&failed[SMB2_CLOSE_HE]));
1371 seq_printf(m, "\nFlushes: %d total %d failed",
1372 atomic_read(&sent[SMB2_FLUSH_HE]),
1373 atomic_read(&failed[SMB2_FLUSH_HE]));
1374 seq_printf(m, "\nReads: %d total %d failed",
1375 atomic_read(&sent[SMB2_READ_HE]),
1376 atomic_read(&failed[SMB2_READ_HE]));
1377 seq_printf(m, "\nWrites: %d total %d failed",
1378 atomic_read(&sent[SMB2_WRITE_HE]),
1379 atomic_read(&failed[SMB2_WRITE_HE]));
1380 seq_printf(m, "\nLocks: %d total %d failed",
1381 atomic_read(&sent[SMB2_LOCK_HE]),
1382 atomic_read(&failed[SMB2_LOCK_HE]));
1383 seq_printf(m, "\nIOCTLs: %d total %d failed",
1384 atomic_read(&sent[SMB2_IOCTL_HE]),
1385 atomic_read(&failed[SMB2_IOCTL_HE]));
1386 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1387 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1388 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1389 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1390 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1391 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1392 seq_printf(m, "\nQueryInfos: %d total %d failed",
1393 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1394 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1395 seq_printf(m, "\nSetInfos: %d total %d failed",
1396 atomic_read(&sent[SMB2_SET_INFO_HE]),
1397 atomic_read(&failed[SMB2_SET_INFO_HE]));
1398 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1399 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1400 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1401 }
1402
1403 static void
smb2_set_fid(struct cifsFileInfo * cfile,struct cifs_fid * fid,__u32 oplock)1404 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1405 {
1406 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1407 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1408
1409 cfile->fid.persistent_fid = fid->persistent_fid;
1410 cfile->fid.volatile_fid = fid->volatile_fid;
1411 cfile->fid.access = fid->access;
1412 #ifdef CONFIG_CIFS_DEBUG2
1413 cfile->fid.mid = fid->mid;
1414 #endif /* CIFS_DEBUG2 */
1415 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1416 &fid->purge_cache);
1417 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1418 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1419 }
1420
1421 static void
smb2_close_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1422 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1423 struct cifs_fid *fid)
1424 {
1425 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1426 }
1427
1428 static void
smb2_close_getattr(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)1429 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1430 struct cifsFileInfo *cfile)
1431 {
1432 struct smb2_file_network_open_info file_inf;
1433 struct inode *inode;
1434 int rc;
1435
1436 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1437 cfile->fid.volatile_fid, &file_inf);
1438 if (rc)
1439 return;
1440
1441 inode = d_inode(cfile->dentry);
1442
1443 spin_lock(&inode->i_lock);
1444 CIFS_I(inode)->time = jiffies;
1445
1446 /* Creation time should not need to be updated on close */
1447 if (file_inf.LastWriteTime)
1448 inode->i_mtime = cifs_NTtimeToUnix(file_inf.LastWriteTime);
1449 if (file_inf.ChangeTime)
1450 inode->i_ctime = cifs_NTtimeToUnix(file_inf.ChangeTime);
1451 if (file_inf.LastAccessTime)
1452 inode->i_atime = cifs_NTtimeToUnix(file_inf.LastAccessTime);
1453
1454 /*
1455 * i_blocks is not related to (i_size / i_blksize),
1456 * but instead 512 byte (2**9) size is required for
1457 * calculating num blocks.
1458 */
1459 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1460 inode->i_blocks =
1461 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1462
1463 /* End of file and Attributes should not have to be updated on close */
1464 spin_unlock(&inode->i_lock);
1465 }
1466
1467 static int
SMB2_request_res_key(const unsigned int xid,struct cifs_tcon * tcon,u64 persistent_fid,u64 volatile_fid,struct copychunk_ioctl * pcchunk)1468 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1469 u64 persistent_fid, u64 volatile_fid,
1470 struct copychunk_ioctl *pcchunk)
1471 {
1472 int rc;
1473 unsigned int ret_data_len;
1474 struct resume_key_req *res_key;
1475
1476 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1477 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1478 CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1479
1480 if (rc) {
1481 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1482 goto req_res_key_exit;
1483 }
1484 if (ret_data_len < sizeof(struct resume_key_req)) {
1485 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1486 rc = -EINVAL;
1487 goto req_res_key_exit;
1488 }
1489 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1490
1491 req_res_key_exit:
1492 kfree(res_key);
1493 return rc;
1494 }
1495
1496 struct iqi_vars {
1497 struct smb_rqst rqst[3];
1498 struct kvec rsp_iov[3];
1499 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1500 struct kvec qi_iov[1];
1501 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1502 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1503 struct kvec close_iov[1];
1504 };
1505
1506 static int
smb2_ioctl_query_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,__le16 * path,int is_dir,unsigned long p)1507 smb2_ioctl_query_info(const unsigned int xid,
1508 struct cifs_tcon *tcon,
1509 struct cifs_sb_info *cifs_sb,
1510 __le16 *path, int is_dir,
1511 unsigned long p)
1512 {
1513 struct iqi_vars *vars;
1514 struct smb_rqst *rqst;
1515 struct kvec *rsp_iov;
1516 struct cifs_ses *ses = tcon->ses;
1517 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1518 char __user *arg = (char __user *)p;
1519 struct smb_query_info qi;
1520 struct smb_query_info __user *pqi;
1521 int rc = 0;
1522 int flags = CIFS_CP_CREATE_CLOSE_OP;
1523 struct smb2_query_info_rsp *qi_rsp = NULL;
1524 struct smb2_ioctl_rsp *io_rsp = NULL;
1525 void *buffer = NULL;
1526 int resp_buftype[3];
1527 struct cifs_open_parms oparms;
1528 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1529 struct cifs_fid fid;
1530 unsigned int size[2];
1531 void *data[2];
1532 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1533 void (*free_req1_func)(struct smb_rqst *r);
1534
1535 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1536 if (vars == NULL)
1537 return -ENOMEM;
1538 rqst = &vars->rqst[0];
1539 rsp_iov = &vars->rsp_iov[0];
1540
1541 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1542
1543 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1544 rc = -EFAULT;
1545 goto free_vars;
1546 }
1547 if (qi.output_buffer_length > 1024) {
1548 rc = -EINVAL;
1549 goto free_vars;
1550 }
1551
1552 if (!ses || !server) {
1553 rc = -EIO;
1554 goto free_vars;
1555 }
1556
1557 if (smb3_encryption_required(tcon))
1558 flags |= CIFS_TRANSFORM_REQ;
1559
1560 if (qi.output_buffer_length) {
1561 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1562 if (IS_ERR(buffer)) {
1563 rc = PTR_ERR(buffer);
1564 goto free_vars;
1565 }
1566 }
1567
1568 /* Open */
1569 rqst[0].rq_iov = &vars->open_iov[0];
1570 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1571
1572 memset(&oparms, 0, sizeof(oparms));
1573 oparms.tcon = tcon;
1574 oparms.disposition = FILE_OPEN;
1575 oparms.create_options = cifs_create_options(cifs_sb, create_options);
1576 oparms.fid = &fid;
1577 oparms.reconnect = false;
1578
1579 if (qi.flags & PASSTHRU_FSCTL) {
1580 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1581 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1582 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1583 break;
1584 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1585 oparms.desired_access = GENERIC_ALL;
1586 break;
1587 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1588 oparms.desired_access = GENERIC_READ;
1589 break;
1590 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1591 oparms.desired_access = GENERIC_WRITE;
1592 break;
1593 }
1594 } else if (qi.flags & PASSTHRU_SET_INFO) {
1595 oparms.desired_access = GENERIC_WRITE;
1596 } else {
1597 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1598 }
1599
1600 rc = SMB2_open_init(tcon, server,
1601 &rqst[0], &oplock, &oparms, path);
1602 if (rc)
1603 goto free_output_buffer;
1604 smb2_set_next_command(tcon, &rqst[0]);
1605
1606 /* Query */
1607 if (qi.flags & PASSTHRU_FSCTL) {
1608 /* Can eventually relax perm check since server enforces too */
1609 if (!capable(CAP_SYS_ADMIN)) {
1610 rc = -EPERM;
1611 goto free_open_req;
1612 }
1613 rqst[1].rq_iov = &vars->io_iov[0];
1614 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1615
1616 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1617 qi.info_type, buffer, qi.output_buffer_length,
1618 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1619 MAX_SMB2_CLOSE_RESPONSE_SIZE);
1620 free_req1_func = SMB2_ioctl_free;
1621 } else if (qi.flags == PASSTHRU_SET_INFO) {
1622 /* Can eventually relax perm check since server enforces too */
1623 if (!capable(CAP_SYS_ADMIN)) {
1624 rc = -EPERM;
1625 goto free_open_req;
1626 }
1627 if (qi.output_buffer_length < 8) {
1628 rc = -EINVAL;
1629 goto free_open_req;
1630 }
1631 rqst[1].rq_iov = &vars->si_iov[0];
1632 rqst[1].rq_nvec = 1;
1633
1634 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1635 size[0] = 8;
1636 data[0] = buffer;
1637
1638 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1639 current->tgid, FILE_END_OF_FILE_INFORMATION,
1640 SMB2_O_INFO_FILE, 0, data, size);
1641 free_req1_func = SMB2_set_info_free;
1642 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1643 rqst[1].rq_iov = &vars->qi_iov[0];
1644 rqst[1].rq_nvec = 1;
1645
1646 rc = SMB2_query_info_init(tcon, server,
1647 &rqst[1], COMPOUND_FID,
1648 COMPOUND_FID, qi.file_info_class,
1649 qi.info_type, qi.additional_information,
1650 qi.input_buffer_length,
1651 qi.output_buffer_length, buffer);
1652 free_req1_func = SMB2_query_info_free;
1653 } else { /* unknown flags */
1654 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1655 qi.flags);
1656 rc = -EINVAL;
1657 }
1658
1659 if (rc)
1660 goto free_open_req;
1661 smb2_set_next_command(tcon, &rqst[1]);
1662 smb2_set_related(&rqst[1]);
1663
1664 /* Close */
1665 rqst[2].rq_iov = &vars->close_iov[0];
1666 rqst[2].rq_nvec = 1;
1667
1668 rc = SMB2_close_init(tcon, server,
1669 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1670 if (rc)
1671 goto free_req_1;
1672 smb2_set_related(&rqst[2]);
1673
1674 rc = compound_send_recv(xid, ses, server,
1675 flags, 3, rqst,
1676 resp_buftype, rsp_iov);
1677 if (rc)
1678 goto out;
1679
1680 /* No need to bump num_remote_opens since handle immediately closed */
1681 if (qi.flags & PASSTHRU_FSCTL) {
1682 pqi = (struct smb_query_info __user *)arg;
1683 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1684 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1685 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1686 if (qi.input_buffer_length > 0 &&
1687 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1688 > rsp_iov[1].iov_len) {
1689 rc = -EFAULT;
1690 goto out;
1691 }
1692
1693 if (copy_to_user(&pqi->input_buffer_length,
1694 &qi.input_buffer_length,
1695 sizeof(qi.input_buffer_length))) {
1696 rc = -EFAULT;
1697 goto out;
1698 }
1699
1700 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1701 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1702 qi.input_buffer_length))
1703 rc = -EFAULT;
1704 } else {
1705 pqi = (struct smb_query_info __user *)arg;
1706 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1707 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1708 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1709 if (copy_to_user(&pqi->input_buffer_length,
1710 &qi.input_buffer_length,
1711 sizeof(qi.input_buffer_length))) {
1712 rc = -EFAULT;
1713 goto out;
1714 }
1715
1716 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1717 qi.input_buffer_length))
1718 rc = -EFAULT;
1719 }
1720
1721 out:
1722 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1723 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1724 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1725 SMB2_close_free(&rqst[2]);
1726 free_req_1:
1727 free_req1_func(&rqst[1]);
1728 free_open_req:
1729 SMB2_open_free(&rqst[0]);
1730 free_output_buffer:
1731 kfree(buffer);
1732 free_vars:
1733 kfree(vars);
1734 return rc;
1735 }
1736
1737 static ssize_t
smb2_copychunk_range(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1738 smb2_copychunk_range(const unsigned int xid,
1739 struct cifsFileInfo *srcfile,
1740 struct cifsFileInfo *trgtfile, u64 src_off,
1741 u64 len, u64 dest_off)
1742 {
1743 int rc;
1744 unsigned int ret_data_len;
1745 struct copychunk_ioctl *pcchunk;
1746 struct copychunk_ioctl_rsp *retbuf = NULL;
1747 struct cifs_tcon *tcon;
1748 int chunks_copied = 0;
1749 bool chunk_sizes_updated = false;
1750 ssize_t bytes_written, total_bytes_written = 0;
1751 struct inode *inode;
1752
1753 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1754
1755 /*
1756 * We need to flush all unwritten data before we can send the
1757 * copychunk ioctl to the server.
1758 */
1759 inode = d_inode(trgtfile->dentry);
1760 filemap_write_and_wait(inode->i_mapping);
1761
1762 if (pcchunk == NULL)
1763 return -ENOMEM;
1764
1765 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1766 /* Request a key from the server to identify the source of the copy */
1767 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1768 srcfile->fid.persistent_fid,
1769 srcfile->fid.volatile_fid, pcchunk);
1770
1771 /* Note: request_res_key sets res_key null only if rc !=0 */
1772 if (rc)
1773 goto cchunk_out;
1774
1775 /* For now array only one chunk long, will make more flexible later */
1776 pcchunk->ChunkCount = cpu_to_le32(1);
1777 pcchunk->Reserved = 0;
1778 pcchunk->Reserved2 = 0;
1779
1780 tcon = tlink_tcon(trgtfile->tlink);
1781
1782 while (len > 0) {
1783 pcchunk->SourceOffset = cpu_to_le64(src_off);
1784 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1785 pcchunk->Length =
1786 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1787
1788 /* Request server copy to target from src identified by key */
1789 kfree(retbuf);
1790 retbuf = NULL;
1791 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1792 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1793 (char *)pcchunk, sizeof(struct copychunk_ioctl),
1794 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1795 if (rc == 0) {
1796 if (ret_data_len !=
1797 sizeof(struct copychunk_ioctl_rsp)) {
1798 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1799 rc = -EIO;
1800 goto cchunk_out;
1801 }
1802 if (retbuf->TotalBytesWritten == 0) {
1803 cifs_dbg(FYI, "no bytes copied\n");
1804 rc = -EIO;
1805 goto cchunk_out;
1806 }
1807 /*
1808 * Check if server claimed to write more than we asked
1809 */
1810 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1811 le32_to_cpu(pcchunk->Length)) {
1812 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1813 rc = -EIO;
1814 goto cchunk_out;
1815 }
1816 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1817 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1818 rc = -EIO;
1819 goto cchunk_out;
1820 }
1821 chunks_copied++;
1822
1823 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1824 src_off += bytes_written;
1825 dest_off += bytes_written;
1826 len -= bytes_written;
1827 total_bytes_written += bytes_written;
1828
1829 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1830 le32_to_cpu(retbuf->ChunksWritten),
1831 le32_to_cpu(retbuf->ChunkBytesWritten),
1832 bytes_written);
1833 } else if (rc == -EINVAL) {
1834 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1835 goto cchunk_out;
1836
1837 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1838 le32_to_cpu(retbuf->ChunksWritten),
1839 le32_to_cpu(retbuf->ChunkBytesWritten),
1840 le32_to_cpu(retbuf->TotalBytesWritten));
1841
1842 /*
1843 * Check if this is the first request using these sizes,
1844 * (ie check if copy succeed once with original sizes
1845 * and check if the server gave us different sizes after
1846 * we already updated max sizes on previous request).
1847 * if not then why is the server returning an error now
1848 */
1849 if ((chunks_copied != 0) || chunk_sizes_updated)
1850 goto cchunk_out;
1851
1852 /* Check that server is not asking us to grow size */
1853 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1854 tcon->max_bytes_chunk)
1855 tcon->max_bytes_chunk =
1856 le32_to_cpu(retbuf->ChunkBytesWritten);
1857 else
1858 goto cchunk_out; /* server gave us bogus size */
1859
1860 /* No need to change MaxChunks since already set to 1 */
1861 chunk_sizes_updated = true;
1862 } else
1863 goto cchunk_out;
1864 }
1865
1866 cchunk_out:
1867 kfree(pcchunk);
1868 kfree(retbuf);
1869 if (rc)
1870 return rc;
1871 else
1872 return total_bytes_written;
1873 }
1874
1875 static int
smb2_flush_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1876 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1877 struct cifs_fid *fid)
1878 {
1879 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1880 }
1881
1882 static unsigned int
smb2_read_data_offset(char * buf)1883 smb2_read_data_offset(char *buf)
1884 {
1885 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1886
1887 return rsp->DataOffset;
1888 }
1889
1890 static unsigned int
smb2_read_data_length(char * buf,bool in_remaining)1891 smb2_read_data_length(char *buf, bool in_remaining)
1892 {
1893 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1894
1895 if (in_remaining)
1896 return le32_to_cpu(rsp->DataRemaining);
1897
1898 return le32_to_cpu(rsp->DataLength);
1899 }
1900
1901
1902 static int
smb2_sync_read(const unsigned int xid,struct cifs_fid * pfid,struct cifs_io_parms * parms,unsigned int * bytes_read,char ** buf,int * buf_type)1903 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1904 struct cifs_io_parms *parms, unsigned int *bytes_read,
1905 char **buf, int *buf_type)
1906 {
1907 parms->persistent_fid = pfid->persistent_fid;
1908 parms->volatile_fid = pfid->volatile_fid;
1909 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1910 }
1911
1912 static int
smb2_sync_write(const unsigned int xid,struct cifs_fid * pfid,struct cifs_io_parms * parms,unsigned int * written,struct kvec * iov,unsigned long nr_segs)1913 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1914 struct cifs_io_parms *parms, unsigned int *written,
1915 struct kvec *iov, unsigned long nr_segs)
1916 {
1917
1918 parms->persistent_fid = pfid->persistent_fid;
1919 parms->volatile_fid = pfid->volatile_fid;
1920 return SMB2_write(xid, parms, written, iov, nr_segs);
1921 }
1922
1923 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
smb2_set_sparse(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct inode * inode,__u8 setsparse)1924 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1925 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1926 {
1927 struct cifsInodeInfo *cifsi;
1928 int rc;
1929
1930 cifsi = CIFS_I(inode);
1931
1932 /* if file already sparse don't bother setting sparse again */
1933 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1934 return true; /* already sparse */
1935
1936 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1937 return true; /* already not sparse */
1938
1939 /*
1940 * Can't check for sparse support on share the usual way via the
1941 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1942 * since Samba server doesn't set the flag on the share, yet
1943 * supports the set sparse FSCTL and returns sparse correctly
1944 * in the file attributes. If we fail setting sparse though we
1945 * mark that server does not support sparse files for this share
1946 * to avoid repeatedly sending the unsupported fsctl to server
1947 * if the file is repeatedly extended.
1948 */
1949 if (tcon->broken_sparse_sup)
1950 return false;
1951
1952 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1953 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1954 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1955 if (rc) {
1956 tcon->broken_sparse_sup = true;
1957 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1958 return false;
1959 }
1960
1961 if (setsparse)
1962 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1963 else
1964 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1965
1966 return true;
1967 }
1968
1969 static int
smb2_set_file_size(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,__u64 size,bool set_alloc)1970 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1971 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1972 {
1973 __le64 eof = cpu_to_le64(size);
1974 struct inode *inode;
1975
1976 /*
1977 * If extending file more than one page make sparse. Many Linux fs
1978 * make files sparse by default when extending via ftruncate
1979 */
1980 inode = d_inode(cfile->dentry);
1981
1982 if (!set_alloc && (size > inode->i_size + 8192)) {
1983 __u8 set_sparse = 1;
1984
1985 /* whether set sparse succeeds or not, extend the file */
1986 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1987 }
1988
1989 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1990 cfile->fid.volatile_fid, cfile->pid, &eof);
1991 }
1992
1993 static int
smb2_duplicate_extents(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1994 smb2_duplicate_extents(const unsigned int xid,
1995 struct cifsFileInfo *srcfile,
1996 struct cifsFileInfo *trgtfile, u64 src_off,
1997 u64 len, u64 dest_off)
1998 {
1999 int rc;
2000 unsigned int ret_data_len;
2001 struct inode *inode;
2002 struct duplicate_extents_to_file dup_ext_buf;
2003 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
2004
2005 /* server fileays advertise duplicate extent support with this flag */
2006 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
2007 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
2008 return -EOPNOTSUPP;
2009
2010 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
2011 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
2012 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
2013 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
2014 dup_ext_buf.ByteCount = cpu_to_le64(len);
2015 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
2016 src_off, dest_off, len);
2017
2018 inode = d_inode(trgtfile->dentry);
2019 if (inode->i_size < dest_off + len) {
2020 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
2021 if (rc)
2022 goto duplicate_extents_out;
2023
2024 /*
2025 * Although also could set plausible allocation size (i_blocks)
2026 * here in addition to setting the file size, in reflink
2027 * it is likely that the target file is sparse. Its allocation
2028 * size will be queried on next revalidate, but it is important
2029 * to make sure that file's cached size is updated immediately
2030 */
2031 cifs_setsize(inode, dest_off + len);
2032 }
2033 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
2034 trgtfile->fid.volatile_fid,
2035 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
2036 (char *)&dup_ext_buf,
2037 sizeof(struct duplicate_extents_to_file),
2038 CIFSMaxBufSize, NULL,
2039 &ret_data_len);
2040
2041 if (ret_data_len > 0)
2042 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2043
2044 duplicate_extents_out:
2045 return rc;
2046 }
2047
2048 static int
smb2_set_compression(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2049 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2050 struct cifsFileInfo *cfile)
2051 {
2052 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2053 cfile->fid.volatile_fid);
2054 }
2055
2056 static int
smb3_set_integrity(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2057 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2058 struct cifsFileInfo *cfile)
2059 {
2060 struct fsctl_set_integrity_information_req integr_info;
2061 unsigned int ret_data_len;
2062
2063 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2064 integr_info.Flags = 0;
2065 integr_info.Reserved = 0;
2066
2067 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2068 cfile->fid.volatile_fid,
2069 FSCTL_SET_INTEGRITY_INFORMATION,
2070 (char *)&integr_info,
2071 sizeof(struct fsctl_set_integrity_information_req),
2072 CIFSMaxBufSize, NULL,
2073 &ret_data_len);
2074
2075 }
2076
2077 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2078 #define GMT_TOKEN_SIZE 50
2079
2080 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2081
2082 /*
2083 * Input buffer contains (empty) struct smb_snapshot array with size filled in
2084 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2085 */
2086 static int
smb3_enum_snapshots(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,void __user * ioc_buf)2087 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2088 struct cifsFileInfo *cfile, void __user *ioc_buf)
2089 {
2090 char *retbuf = NULL;
2091 unsigned int ret_data_len = 0;
2092 int rc;
2093 u32 max_response_size;
2094 struct smb_snapshot_array snapshot_in;
2095
2096 /*
2097 * On the first query to enumerate the list of snapshots available
2098 * for this volume the buffer begins with 0 (number of snapshots
2099 * which can be returned is zero since at that point we do not know
2100 * how big the buffer needs to be). On the second query,
2101 * it (ret_data_len) is set to number of snapshots so we can
2102 * know to set the maximum response size larger (see below).
2103 */
2104 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2105 return -EFAULT;
2106
2107 /*
2108 * Note that for snapshot queries that servers like Azure expect that
2109 * the first query be minimal size (and just used to get the number/size
2110 * of previous versions) so response size must be specified as EXACTLY
2111 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2112 * of eight bytes.
2113 */
2114 if (ret_data_len == 0)
2115 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2116 else
2117 max_response_size = CIFSMaxBufSize;
2118
2119 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2120 cfile->fid.volatile_fid,
2121 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2122 NULL, 0 /* no input data */, max_response_size,
2123 (char **)&retbuf,
2124 &ret_data_len);
2125 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2126 rc, ret_data_len);
2127 if (rc)
2128 return rc;
2129
2130 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2131 /* Fixup buffer */
2132 if (copy_from_user(&snapshot_in, ioc_buf,
2133 sizeof(struct smb_snapshot_array))) {
2134 rc = -EFAULT;
2135 kfree(retbuf);
2136 return rc;
2137 }
2138
2139 /*
2140 * Check for min size, ie not large enough to fit even one GMT
2141 * token (snapshot). On the first ioctl some users may pass in
2142 * smaller size (or zero) to simply get the size of the array
2143 * so the user space caller can allocate sufficient memory
2144 * and retry the ioctl again with larger array size sufficient
2145 * to hold all of the snapshot GMT tokens on the second try.
2146 */
2147 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2148 ret_data_len = sizeof(struct smb_snapshot_array);
2149
2150 /*
2151 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2152 * the snapshot array (of 50 byte GMT tokens) each
2153 * representing an available previous version of the data
2154 */
2155 if (ret_data_len > (snapshot_in.snapshot_array_size +
2156 sizeof(struct smb_snapshot_array)))
2157 ret_data_len = snapshot_in.snapshot_array_size +
2158 sizeof(struct smb_snapshot_array);
2159
2160 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2161 rc = -EFAULT;
2162 }
2163
2164 kfree(retbuf);
2165 return rc;
2166 }
2167
2168
2169
2170 static int
smb3_notify(const unsigned int xid,struct file * pfile,void __user * ioc_buf)2171 smb3_notify(const unsigned int xid, struct file *pfile,
2172 void __user *ioc_buf)
2173 {
2174 struct smb3_notify notify;
2175 struct dentry *dentry = pfile->f_path.dentry;
2176 struct inode *inode = file_inode(pfile);
2177 struct cifs_sb_info *cifs_sb;
2178 struct cifs_open_parms oparms;
2179 struct cifs_fid fid;
2180 struct cifs_tcon *tcon;
2181 unsigned char *path = NULL;
2182 __le16 *utf16_path = NULL;
2183 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2184 int rc = 0;
2185
2186 path = build_path_from_dentry(dentry);
2187 if (path == NULL)
2188 return -ENOMEM;
2189
2190 cifs_sb = CIFS_SB(inode->i_sb);
2191
2192 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2193 if (utf16_path == NULL) {
2194 rc = -ENOMEM;
2195 goto notify_exit;
2196 }
2197
2198 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) {
2199 rc = -EFAULT;
2200 goto notify_exit;
2201 }
2202
2203 tcon = cifs_sb_master_tcon(cifs_sb);
2204 oparms.tcon = tcon;
2205 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2206 oparms.disposition = FILE_OPEN;
2207 oparms.create_options = cifs_create_options(cifs_sb, 0);
2208 oparms.fid = &fid;
2209 oparms.reconnect = false;
2210
2211 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2212 NULL);
2213 if (rc)
2214 goto notify_exit;
2215
2216 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2217 notify.watch_tree, notify.completion_filter);
2218
2219 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2220
2221 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2222
2223 notify_exit:
2224 kfree(path);
2225 kfree(utf16_path);
2226 return rc;
2227 }
2228
2229 static int
smb2_query_dir_first(const unsigned int xid,struct cifs_tcon * tcon,const char * path,struct cifs_sb_info * cifs_sb,struct cifs_fid * fid,__u16 search_flags,struct cifs_search_info * srch_inf)2230 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2231 const char *path, struct cifs_sb_info *cifs_sb,
2232 struct cifs_fid *fid, __u16 search_flags,
2233 struct cifs_search_info *srch_inf)
2234 {
2235 __le16 *utf16_path;
2236 struct smb_rqst rqst[2];
2237 struct kvec rsp_iov[2];
2238 int resp_buftype[2];
2239 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2240 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2241 int rc, flags = 0;
2242 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2243 struct cifs_open_parms oparms;
2244 struct smb2_query_directory_rsp *qd_rsp = NULL;
2245 struct smb2_create_rsp *op_rsp = NULL;
2246 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2247
2248 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2249 if (!utf16_path)
2250 return -ENOMEM;
2251
2252 if (smb3_encryption_required(tcon))
2253 flags |= CIFS_TRANSFORM_REQ;
2254
2255 memset(rqst, 0, sizeof(rqst));
2256 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2257 memset(rsp_iov, 0, sizeof(rsp_iov));
2258
2259 /* Open */
2260 memset(&open_iov, 0, sizeof(open_iov));
2261 rqst[0].rq_iov = open_iov;
2262 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2263
2264 oparms.tcon = tcon;
2265 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
2266 oparms.disposition = FILE_OPEN;
2267 oparms.create_options = cifs_create_options(cifs_sb, 0);
2268 oparms.fid = fid;
2269 oparms.reconnect = false;
2270
2271 rc = SMB2_open_init(tcon, server,
2272 &rqst[0], &oplock, &oparms, utf16_path);
2273 if (rc)
2274 goto qdf_free;
2275 smb2_set_next_command(tcon, &rqst[0]);
2276
2277 /* Query directory */
2278 srch_inf->entries_in_buffer = 0;
2279 srch_inf->index_of_last_entry = 2;
2280
2281 memset(&qd_iov, 0, sizeof(qd_iov));
2282 rqst[1].rq_iov = qd_iov;
2283 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2284
2285 rc = SMB2_query_directory_init(xid, tcon, server,
2286 &rqst[1],
2287 COMPOUND_FID, COMPOUND_FID,
2288 0, srch_inf->info_level);
2289 if (rc)
2290 goto qdf_free;
2291
2292 smb2_set_related(&rqst[1]);
2293
2294 rc = compound_send_recv(xid, tcon->ses, server,
2295 flags, 2, rqst,
2296 resp_buftype, rsp_iov);
2297
2298 /* If the open failed there is nothing to do */
2299 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2300 if (op_rsp == NULL || op_rsp->sync_hdr.Status != STATUS_SUCCESS) {
2301 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2302 goto qdf_free;
2303 }
2304 fid->persistent_fid = op_rsp->PersistentFileId;
2305 fid->volatile_fid = op_rsp->VolatileFileId;
2306
2307 /* Anything else than ENODATA means a genuine error */
2308 if (rc && rc != -ENODATA) {
2309 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2310 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2311 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2312 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2313 goto qdf_free;
2314 }
2315
2316 atomic_inc(&tcon->num_remote_opens);
2317
2318 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2319 if (qd_rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
2320 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2321 tcon->tid, tcon->ses->Suid, 0, 0);
2322 srch_inf->endOfSearch = true;
2323 rc = 0;
2324 goto qdf_free;
2325 }
2326
2327 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2328 srch_inf);
2329 if (rc) {
2330 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2331 tcon->ses->Suid, 0, 0, rc);
2332 goto qdf_free;
2333 }
2334 resp_buftype[1] = CIFS_NO_BUFFER;
2335
2336 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2337 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2338
2339 qdf_free:
2340 kfree(utf16_path);
2341 SMB2_open_free(&rqst[0]);
2342 SMB2_query_directory_free(&rqst[1]);
2343 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2344 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2345 return rc;
2346 }
2347
2348 static int
smb2_query_dir_next(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid,__u16 search_flags,struct cifs_search_info * srch_inf)2349 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2350 struct cifs_fid *fid, __u16 search_flags,
2351 struct cifs_search_info *srch_inf)
2352 {
2353 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2354 fid->volatile_fid, 0, srch_inf);
2355 }
2356
2357 static int
smb2_close_dir(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)2358 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2359 struct cifs_fid *fid)
2360 {
2361 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2362 }
2363
2364 /*
2365 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2366 * the number of credits and return true. Otherwise - return false.
2367 */
2368 static bool
smb2_is_status_pending(char * buf,struct TCP_Server_Info * server)2369 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2370 {
2371 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2372
2373 if (shdr->Status != STATUS_PENDING)
2374 return false;
2375
2376 if (shdr->CreditRequest) {
2377 spin_lock(&server->req_lock);
2378 server->credits += le16_to_cpu(shdr->CreditRequest);
2379 spin_unlock(&server->req_lock);
2380 wake_up(&server->request_q);
2381 }
2382
2383 return true;
2384 }
2385
2386 static bool
smb2_is_session_expired(char * buf)2387 smb2_is_session_expired(char *buf)
2388 {
2389 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2390
2391 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2392 shdr->Status != STATUS_USER_SESSION_DELETED)
2393 return false;
2394
2395 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2396 le16_to_cpu(shdr->Command),
2397 le64_to_cpu(shdr->MessageId));
2398 cifs_dbg(FYI, "Session expired or deleted\n");
2399
2400 return true;
2401 }
2402
2403 static bool
smb2_is_status_io_timeout(char * buf)2404 smb2_is_status_io_timeout(char *buf)
2405 {
2406 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2407
2408 if (shdr->Status == STATUS_IO_TIMEOUT)
2409 return true;
2410 else
2411 return false;
2412 }
2413
2414 static int
smb2_oplock_response(struct cifs_tcon * tcon,struct cifs_fid * fid,struct cifsInodeInfo * cinode)2415 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2416 struct cifsInodeInfo *cinode)
2417 {
2418 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2419 return SMB2_lease_break(0, tcon, cinode->lease_key,
2420 smb2_get_lease_state(cinode));
2421
2422 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2423 fid->volatile_fid,
2424 CIFS_CACHE_READ(cinode) ? 1 : 0);
2425 }
2426
2427 void
smb2_set_related(struct smb_rqst * rqst)2428 smb2_set_related(struct smb_rqst *rqst)
2429 {
2430 struct smb2_sync_hdr *shdr;
2431
2432 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2433 if (shdr == NULL) {
2434 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2435 return;
2436 }
2437 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2438 }
2439
2440 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2441
2442 void
smb2_set_next_command(struct cifs_tcon * tcon,struct smb_rqst * rqst)2443 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2444 {
2445 struct smb2_sync_hdr *shdr;
2446 struct cifs_ses *ses = tcon->ses;
2447 struct TCP_Server_Info *server = ses->server;
2448 unsigned long len = smb_rqst_len(server, rqst);
2449 int i, num_padding;
2450
2451 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2452 if (shdr == NULL) {
2453 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2454 return;
2455 }
2456
2457 /* SMB headers in a compound are 8 byte aligned. */
2458
2459 /* No padding needed */
2460 if (!(len & 7))
2461 goto finished;
2462
2463 num_padding = 8 - (len & 7);
2464 if (!smb3_encryption_required(tcon)) {
2465 /*
2466 * If we do not have encryption then we can just add an extra
2467 * iov for the padding.
2468 */
2469 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2470 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2471 rqst->rq_nvec++;
2472 len += num_padding;
2473 } else {
2474 /*
2475 * We can not add a small padding iov for the encryption case
2476 * because the encryption framework can not handle the padding
2477 * iovs.
2478 * We have to flatten this into a single buffer and add
2479 * the padding to it.
2480 */
2481 for (i = 1; i < rqst->rq_nvec; i++) {
2482 memcpy(rqst->rq_iov[0].iov_base +
2483 rqst->rq_iov[0].iov_len,
2484 rqst->rq_iov[i].iov_base,
2485 rqst->rq_iov[i].iov_len);
2486 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2487 }
2488 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2489 0, num_padding);
2490 rqst->rq_iov[0].iov_len += num_padding;
2491 len += num_padding;
2492 rqst->rq_nvec = 1;
2493 }
2494
2495 finished:
2496 shdr->NextCommand = cpu_to_le32(len);
2497 }
2498
2499 /*
2500 * Passes the query info response back to the caller on success.
2501 * Caller need to free this with free_rsp_buf().
2502 */
2503 int
smb2_query_info_compound(const unsigned int xid,struct cifs_tcon * tcon,__le16 * utf16_path,u32 desired_access,u32 class,u32 type,u32 output_len,struct kvec * rsp,int * buftype,struct cifs_sb_info * cifs_sb)2504 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2505 __le16 *utf16_path, u32 desired_access,
2506 u32 class, u32 type, u32 output_len,
2507 struct kvec *rsp, int *buftype,
2508 struct cifs_sb_info *cifs_sb)
2509 {
2510 struct cifs_ses *ses = tcon->ses;
2511 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2512 int flags = CIFS_CP_CREATE_CLOSE_OP;
2513 struct smb_rqst rqst[3];
2514 int resp_buftype[3];
2515 struct kvec rsp_iov[3];
2516 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2517 struct kvec qi_iov[1];
2518 struct kvec close_iov[1];
2519 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2520 struct cifs_open_parms oparms;
2521 struct cifs_fid fid;
2522 int rc;
2523
2524 if (smb3_encryption_required(tcon))
2525 flags |= CIFS_TRANSFORM_REQ;
2526
2527 memset(rqst, 0, sizeof(rqst));
2528 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2529 memset(rsp_iov, 0, sizeof(rsp_iov));
2530
2531 memset(&open_iov, 0, sizeof(open_iov));
2532 rqst[0].rq_iov = open_iov;
2533 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2534
2535 oparms.tcon = tcon;
2536 oparms.desired_access = desired_access;
2537 oparms.disposition = FILE_OPEN;
2538 oparms.create_options = cifs_create_options(cifs_sb, 0);
2539 oparms.fid = &fid;
2540 oparms.reconnect = false;
2541
2542 rc = SMB2_open_init(tcon, server,
2543 &rqst[0], &oplock, &oparms, utf16_path);
2544 if (rc)
2545 goto qic_exit;
2546 smb2_set_next_command(tcon, &rqst[0]);
2547
2548 memset(&qi_iov, 0, sizeof(qi_iov));
2549 rqst[1].rq_iov = qi_iov;
2550 rqst[1].rq_nvec = 1;
2551
2552 rc = SMB2_query_info_init(tcon, server,
2553 &rqst[1], COMPOUND_FID, COMPOUND_FID,
2554 class, type, 0,
2555 output_len, 0,
2556 NULL);
2557 if (rc)
2558 goto qic_exit;
2559 smb2_set_next_command(tcon, &rqst[1]);
2560 smb2_set_related(&rqst[1]);
2561
2562 memset(&close_iov, 0, sizeof(close_iov));
2563 rqst[2].rq_iov = close_iov;
2564 rqst[2].rq_nvec = 1;
2565
2566 rc = SMB2_close_init(tcon, server,
2567 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2568 if (rc)
2569 goto qic_exit;
2570 smb2_set_related(&rqst[2]);
2571
2572 rc = compound_send_recv(xid, ses, server,
2573 flags, 3, rqst,
2574 resp_buftype, rsp_iov);
2575 if (rc) {
2576 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2577 if (rc == -EREMCHG) {
2578 tcon->need_reconnect = true;
2579 pr_warn_once("server share %s deleted\n",
2580 tcon->treeName);
2581 }
2582 goto qic_exit;
2583 }
2584 *rsp = rsp_iov[1];
2585 *buftype = resp_buftype[1];
2586
2587 qic_exit:
2588 SMB2_open_free(&rqst[0]);
2589 SMB2_query_info_free(&rqst[1]);
2590 SMB2_close_free(&rqst[2]);
2591 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2592 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2593 return rc;
2594 }
2595
2596 static int
smb2_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2597 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2598 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2599 {
2600 struct smb2_query_info_rsp *rsp;
2601 struct smb2_fs_full_size_info *info = NULL;
2602 __le16 utf16_path = 0; /* Null - open root of share */
2603 struct kvec rsp_iov = {NULL, 0};
2604 int buftype = CIFS_NO_BUFFER;
2605 int rc;
2606
2607
2608 rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2609 FILE_READ_ATTRIBUTES,
2610 FS_FULL_SIZE_INFORMATION,
2611 SMB2_O_INFO_FILESYSTEM,
2612 sizeof(struct smb2_fs_full_size_info),
2613 &rsp_iov, &buftype, cifs_sb);
2614 if (rc)
2615 goto qfs_exit;
2616
2617 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2618 buf->f_type = SMB2_MAGIC_NUMBER;
2619 info = (struct smb2_fs_full_size_info *)(
2620 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2621 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2622 le32_to_cpu(rsp->OutputBufferLength),
2623 &rsp_iov,
2624 sizeof(struct smb2_fs_full_size_info));
2625 if (!rc)
2626 smb2_copy_fs_info_to_kstatfs(info, buf);
2627
2628 qfs_exit:
2629 free_rsp_buf(buftype, rsp_iov.iov_base);
2630 return rc;
2631 }
2632
2633 static int
smb311_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2634 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2635 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2636 {
2637 int rc;
2638 __le16 srch_path = 0; /* Null - open root of share */
2639 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2640 struct cifs_open_parms oparms;
2641 struct cifs_fid fid;
2642
2643 if (!tcon->posix_extensions)
2644 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2645
2646 oparms.tcon = tcon;
2647 oparms.desired_access = FILE_READ_ATTRIBUTES;
2648 oparms.disposition = FILE_OPEN;
2649 oparms.create_options = cifs_create_options(cifs_sb, 0);
2650 oparms.fid = &fid;
2651 oparms.reconnect = false;
2652
2653 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2654 NULL, NULL);
2655 if (rc)
2656 return rc;
2657
2658 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2659 fid.volatile_fid, buf);
2660 buf->f_type = SMB2_MAGIC_NUMBER;
2661 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2662 return rc;
2663 }
2664
2665 static bool
smb2_compare_fids(struct cifsFileInfo * ob1,struct cifsFileInfo * ob2)2666 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2667 {
2668 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2669 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2670 }
2671
2672 static int
smb2_mand_lock(const unsigned int xid,struct cifsFileInfo * cfile,__u64 offset,__u64 length,__u32 type,int lock,int unlock,bool wait)2673 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2674 __u64 length, __u32 type, int lock, int unlock, bool wait)
2675 {
2676 if (unlock && !lock)
2677 type = SMB2_LOCKFLAG_UNLOCK;
2678 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2679 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2680 current->tgid, length, offset, type, wait);
2681 }
2682
2683 static void
smb2_get_lease_key(struct inode * inode,struct cifs_fid * fid)2684 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2685 {
2686 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2687 }
2688
2689 static void
smb2_set_lease_key(struct inode * inode,struct cifs_fid * fid)2690 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2691 {
2692 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2693 }
2694
2695 static void
smb2_new_lease_key(struct cifs_fid * fid)2696 smb2_new_lease_key(struct cifs_fid *fid)
2697 {
2698 generate_random_uuid(fid->lease_key);
2699 }
2700
2701 static int
smb2_get_dfs_refer(const unsigned int xid,struct cifs_ses * ses,const char * search_name,struct dfs_info3_param ** target_nodes,unsigned int * num_of_nodes,const struct nls_table * nls_codepage,int remap)2702 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2703 const char *search_name,
2704 struct dfs_info3_param **target_nodes,
2705 unsigned int *num_of_nodes,
2706 const struct nls_table *nls_codepage, int remap)
2707 {
2708 int rc;
2709 __le16 *utf16_path = NULL;
2710 int utf16_path_len = 0;
2711 struct cifs_tcon *tcon;
2712 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2713 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2714 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2715
2716 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2717
2718 /*
2719 * Try to use the IPC tcon, otherwise just use any
2720 */
2721 tcon = ses->tcon_ipc;
2722 if (tcon == NULL) {
2723 spin_lock(&cifs_tcp_ses_lock);
2724 tcon = list_first_entry_or_null(&ses->tcon_list,
2725 struct cifs_tcon,
2726 tcon_list);
2727 if (tcon)
2728 tcon->tc_count++;
2729 spin_unlock(&cifs_tcp_ses_lock);
2730 }
2731
2732 if (tcon == NULL) {
2733 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2734 ses);
2735 rc = -ENOTCONN;
2736 goto out;
2737 }
2738
2739 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2740 &utf16_path_len,
2741 nls_codepage, remap);
2742 if (!utf16_path) {
2743 rc = -ENOMEM;
2744 goto out;
2745 }
2746
2747 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2748 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2749 if (!dfs_req) {
2750 rc = -ENOMEM;
2751 goto out;
2752 }
2753
2754 /* Highest DFS referral version understood */
2755 dfs_req->MaxReferralLevel = DFS_VERSION;
2756
2757 /* Path to resolve in an UTF-16 null-terminated string */
2758 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2759
2760 do {
2761 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2762 FSCTL_DFS_GET_REFERRALS,
2763 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2764 (char **)&dfs_rsp, &dfs_rsp_size);
2765 } while (rc == -EAGAIN);
2766
2767 if (rc) {
2768 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2769 cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2770 goto out;
2771 }
2772
2773 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2774 num_of_nodes, target_nodes,
2775 nls_codepage, remap, search_name,
2776 true /* is_unicode */);
2777 if (rc) {
2778 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2779 goto out;
2780 }
2781
2782 out:
2783 if (tcon && !tcon->ipc) {
2784 /* ipc tcons are not refcounted */
2785 spin_lock(&cifs_tcp_ses_lock);
2786 tcon->tc_count--;
2787 spin_unlock(&cifs_tcp_ses_lock);
2788 }
2789 kfree(utf16_path);
2790 kfree(dfs_req);
2791 kfree(dfs_rsp);
2792 return rc;
2793 }
2794
2795 static int
parse_reparse_posix(struct reparse_posix_data * symlink_buf,u32 plen,char ** target_path,struct cifs_sb_info * cifs_sb)2796 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2797 u32 plen, char **target_path,
2798 struct cifs_sb_info *cifs_sb)
2799 {
2800 unsigned int len;
2801
2802 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2803 len = le16_to_cpu(symlink_buf->ReparseDataLength);
2804
2805 if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2806 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2807 le64_to_cpu(symlink_buf->InodeType));
2808 return -EOPNOTSUPP;
2809 }
2810
2811 *target_path = cifs_strndup_from_utf16(
2812 symlink_buf->PathBuffer,
2813 len, true, cifs_sb->local_nls);
2814 if (!(*target_path))
2815 return -ENOMEM;
2816
2817 convert_delimiter(*target_path, '/');
2818 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2819
2820 return 0;
2821 }
2822
2823 static int
parse_reparse_symlink(struct reparse_symlink_data_buffer * symlink_buf,u32 plen,char ** target_path,struct cifs_sb_info * cifs_sb)2824 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2825 u32 plen, char **target_path,
2826 struct cifs_sb_info *cifs_sb)
2827 {
2828 unsigned int sub_len;
2829 unsigned int sub_offset;
2830
2831 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2832
2833 sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2834 sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2835 if (sub_offset + 20 > plen ||
2836 sub_offset + sub_len + 20 > plen) {
2837 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2838 return -EIO;
2839 }
2840
2841 *target_path = cifs_strndup_from_utf16(
2842 symlink_buf->PathBuffer + sub_offset,
2843 sub_len, true, cifs_sb->local_nls);
2844 if (!(*target_path))
2845 return -ENOMEM;
2846
2847 convert_delimiter(*target_path, '/');
2848 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2849
2850 return 0;
2851 }
2852
2853 static int
parse_reparse_point(struct reparse_data_buffer * buf,u32 plen,char ** target_path,struct cifs_sb_info * cifs_sb)2854 parse_reparse_point(struct reparse_data_buffer *buf,
2855 u32 plen, char **target_path,
2856 struct cifs_sb_info *cifs_sb)
2857 {
2858 if (plen < sizeof(struct reparse_data_buffer)) {
2859 cifs_dbg(VFS, "reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2860 plen);
2861 return -EIO;
2862 }
2863
2864 if (plen < le16_to_cpu(buf->ReparseDataLength) +
2865 sizeof(struct reparse_data_buffer)) {
2866 cifs_dbg(VFS, "srv returned invalid reparse buf length: %d\n",
2867 plen);
2868 return -EIO;
2869 }
2870
2871 /* See MS-FSCC 2.1.2 */
2872 switch (le32_to_cpu(buf->ReparseTag)) {
2873 case IO_REPARSE_TAG_NFS:
2874 return parse_reparse_posix(
2875 (struct reparse_posix_data *)buf,
2876 plen, target_path, cifs_sb);
2877 case IO_REPARSE_TAG_SYMLINK:
2878 return parse_reparse_symlink(
2879 (struct reparse_symlink_data_buffer *)buf,
2880 plen, target_path, cifs_sb);
2881 default:
2882 cifs_dbg(VFS, "srv returned unknown symlink buffer tag:0x%08x\n",
2883 le32_to_cpu(buf->ReparseTag));
2884 return -EOPNOTSUPP;
2885 }
2886 }
2887
2888 #define SMB2_SYMLINK_STRUCT_SIZE \
2889 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2890
2891 static int
smb2_query_symlink(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,char ** target_path,bool is_reparse_point)2892 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2893 struct cifs_sb_info *cifs_sb, const char *full_path,
2894 char **target_path, bool is_reparse_point)
2895 {
2896 int rc;
2897 __le16 *utf16_path = NULL;
2898 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2899 struct cifs_open_parms oparms;
2900 struct cifs_fid fid;
2901 struct kvec err_iov = {NULL, 0};
2902 struct smb2_err_rsp *err_buf = NULL;
2903 struct smb2_symlink_err_rsp *symlink;
2904 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2905 unsigned int sub_len;
2906 unsigned int sub_offset;
2907 unsigned int print_len;
2908 unsigned int print_offset;
2909 int flags = CIFS_CP_CREATE_CLOSE_OP;
2910 struct smb_rqst rqst[3];
2911 int resp_buftype[3];
2912 struct kvec rsp_iov[3];
2913 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2914 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2915 struct kvec close_iov[1];
2916 struct smb2_create_rsp *create_rsp;
2917 struct smb2_ioctl_rsp *ioctl_rsp;
2918 struct reparse_data_buffer *reparse_buf;
2919 int create_options = is_reparse_point ? OPEN_REPARSE_POINT : 0;
2920 u32 plen;
2921
2922 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2923
2924 *target_path = NULL;
2925
2926 if (smb3_encryption_required(tcon))
2927 flags |= CIFS_TRANSFORM_REQ;
2928
2929 memset(rqst, 0, sizeof(rqst));
2930 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2931 memset(rsp_iov, 0, sizeof(rsp_iov));
2932
2933 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2934 if (!utf16_path)
2935 return -ENOMEM;
2936
2937 /* Open */
2938 memset(&open_iov, 0, sizeof(open_iov));
2939 rqst[0].rq_iov = open_iov;
2940 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2941
2942 memset(&oparms, 0, sizeof(oparms));
2943 oparms.tcon = tcon;
2944 oparms.desired_access = FILE_READ_ATTRIBUTES;
2945 oparms.disposition = FILE_OPEN;
2946 oparms.create_options = cifs_create_options(cifs_sb, create_options);
2947 oparms.fid = &fid;
2948 oparms.reconnect = false;
2949
2950 rc = SMB2_open_init(tcon, server,
2951 &rqst[0], &oplock, &oparms, utf16_path);
2952 if (rc)
2953 goto querty_exit;
2954 smb2_set_next_command(tcon, &rqst[0]);
2955
2956
2957 /* IOCTL */
2958 memset(&io_iov, 0, sizeof(io_iov));
2959 rqst[1].rq_iov = io_iov;
2960 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2961
2962 rc = SMB2_ioctl_init(tcon, server,
2963 &rqst[1], fid.persistent_fid,
2964 fid.volatile_fid, FSCTL_GET_REPARSE_POINT, NULL, 0,
2965 CIFSMaxBufSize -
2966 MAX_SMB2_CREATE_RESPONSE_SIZE -
2967 MAX_SMB2_CLOSE_RESPONSE_SIZE);
2968 if (rc)
2969 goto querty_exit;
2970
2971 smb2_set_next_command(tcon, &rqst[1]);
2972 smb2_set_related(&rqst[1]);
2973
2974
2975 /* Close */
2976 memset(&close_iov, 0, sizeof(close_iov));
2977 rqst[2].rq_iov = close_iov;
2978 rqst[2].rq_nvec = 1;
2979
2980 rc = SMB2_close_init(tcon, server,
2981 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2982 if (rc)
2983 goto querty_exit;
2984
2985 smb2_set_related(&rqst[2]);
2986
2987 rc = compound_send_recv(xid, tcon->ses, server,
2988 flags, 3, rqst,
2989 resp_buftype, rsp_iov);
2990
2991 create_rsp = rsp_iov[0].iov_base;
2992 if (create_rsp && create_rsp->sync_hdr.Status)
2993 err_iov = rsp_iov[0];
2994 ioctl_rsp = rsp_iov[1].iov_base;
2995
2996 /*
2997 * Open was successful and we got an ioctl response.
2998 */
2999 if ((rc == 0) && (is_reparse_point)) {
3000 /* See MS-FSCC 2.3.23 */
3001
3002 reparse_buf = (struct reparse_data_buffer *)
3003 ((char *)ioctl_rsp +
3004 le32_to_cpu(ioctl_rsp->OutputOffset));
3005 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3006
3007 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3008 rsp_iov[1].iov_len) {
3009 cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
3010 plen);
3011 rc = -EIO;
3012 goto querty_exit;
3013 }
3014
3015 rc = parse_reparse_point(reparse_buf, plen, target_path,
3016 cifs_sb);
3017 goto querty_exit;
3018 }
3019
3020 if (!rc || !err_iov.iov_base) {
3021 rc = -ENOENT;
3022 goto querty_exit;
3023 }
3024
3025 err_buf = err_iov.iov_base;
3026 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
3027 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
3028 rc = -EINVAL;
3029 goto querty_exit;
3030 }
3031
3032 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
3033 if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
3034 le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
3035 rc = -EINVAL;
3036 goto querty_exit;
3037 }
3038
3039 /* open must fail on symlink - reset rc */
3040 rc = 0;
3041 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
3042 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
3043 print_len = le16_to_cpu(symlink->PrintNameLength);
3044 print_offset = le16_to_cpu(symlink->PrintNameOffset);
3045
3046 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
3047 rc = -EINVAL;
3048 goto querty_exit;
3049 }
3050
3051 if (err_iov.iov_len <
3052 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
3053 rc = -EINVAL;
3054 goto querty_exit;
3055 }
3056
3057 *target_path = cifs_strndup_from_utf16(
3058 (char *)symlink->PathBuffer + sub_offset,
3059 sub_len, true, cifs_sb->local_nls);
3060 if (!(*target_path)) {
3061 rc = -ENOMEM;
3062 goto querty_exit;
3063 }
3064 convert_delimiter(*target_path, '/');
3065 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
3066
3067 querty_exit:
3068 cifs_dbg(FYI, "query symlink rc %d\n", rc);
3069 kfree(utf16_path);
3070 SMB2_open_free(&rqst[0]);
3071 SMB2_ioctl_free(&rqst[1]);
3072 SMB2_close_free(&rqst[2]);
3073 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3074 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3075 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3076 return rc;
3077 }
3078
3079 int
smb2_query_reparse_tag(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,__u32 * tag)3080 smb2_query_reparse_tag(const unsigned int xid, struct cifs_tcon *tcon,
3081 struct cifs_sb_info *cifs_sb, const char *full_path,
3082 __u32 *tag)
3083 {
3084 int rc;
3085 __le16 *utf16_path = NULL;
3086 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3087 struct cifs_open_parms oparms;
3088 struct cifs_fid fid;
3089 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3090 int flags = CIFS_CP_CREATE_CLOSE_OP;
3091 struct smb_rqst rqst[3];
3092 int resp_buftype[3];
3093 struct kvec rsp_iov[3];
3094 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
3095 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
3096 struct kvec close_iov[1];
3097 struct smb2_ioctl_rsp *ioctl_rsp;
3098 struct reparse_data_buffer *reparse_buf;
3099 u32 plen;
3100
3101 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3102
3103 if (smb3_encryption_required(tcon))
3104 flags |= CIFS_TRANSFORM_REQ;
3105
3106 memset(rqst, 0, sizeof(rqst));
3107 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3108 memset(rsp_iov, 0, sizeof(rsp_iov));
3109
3110 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3111 if (!utf16_path)
3112 return -ENOMEM;
3113
3114 /*
3115 * setup smb2open - TODO add optimization to call cifs_get_readable_path
3116 * to see if there is a handle already open that we can use
3117 */
3118 memset(&open_iov, 0, sizeof(open_iov));
3119 rqst[0].rq_iov = open_iov;
3120 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3121
3122 memset(&oparms, 0, sizeof(oparms));
3123 oparms.tcon = tcon;
3124 oparms.desired_access = FILE_READ_ATTRIBUTES;
3125 oparms.disposition = FILE_OPEN;
3126 oparms.create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT);
3127 oparms.fid = &fid;
3128 oparms.reconnect = false;
3129
3130 rc = SMB2_open_init(tcon, server,
3131 &rqst[0], &oplock, &oparms, utf16_path);
3132 if (rc)
3133 goto query_rp_exit;
3134 smb2_set_next_command(tcon, &rqst[0]);
3135
3136
3137 /* IOCTL */
3138 memset(&io_iov, 0, sizeof(io_iov));
3139 rqst[1].rq_iov = io_iov;
3140 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3141
3142 rc = SMB2_ioctl_init(tcon, server,
3143 &rqst[1], COMPOUND_FID,
3144 COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3145 CIFSMaxBufSize -
3146 MAX_SMB2_CREATE_RESPONSE_SIZE -
3147 MAX_SMB2_CLOSE_RESPONSE_SIZE);
3148 if (rc)
3149 goto query_rp_exit;
3150
3151 smb2_set_next_command(tcon, &rqst[1]);
3152 smb2_set_related(&rqst[1]);
3153
3154
3155 /* Close */
3156 memset(&close_iov, 0, sizeof(close_iov));
3157 rqst[2].rq_iov = close_iov;
3158 rqst[2].rq_nvec = 1;
3159
3160 rc = SMB2_close_init(tcon, server,
3161 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3162 if (rc)
3163 goto query_rp_exit;
3164
3165 smb2_set_related(&rqst[2]);
3166
3167 rc = compound_send_recv(xid, tcon->ses, server,
3168 flags, 3, rqst,
3169 resp_buftype, rsp_iov);
3170
3171 ioctl_rsp = rsp_iov[1].iov_base;
3172
3173 /*
3174 * Open was successful and we got an ioctl response.
3175 */
3176 if (rc == 0) {
3177 /* See MS-FSCC 2.3.23 */
3178
3179 reparse_buf = (struct reparse_data_buffer *)
3180 ((char *)ioctl_rsp +
3181 le32_to_cpu(ioctl_rsp->OutputOffset));
3182 plen = le32_to_cpu(ioctl_rsp->OutputCount);
3183
3184 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
3185 rsp_iov[1].iov_len) {
3186 cifs_tcon_dbg(FYI, "srv returned invalid ioctl len: %d\n",
3187 plen);
3188 rc = -EIO;
3189 goto query_rp_exit;
3190 }
3191 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3192 }
3193
3194 query_rp_exit:
3195 kfree(utf16_path);
3196 SMB2_open_free(&rqst[0]);
3197 SMB2_ioctl_free(&rqst[1]);
3198 SMB2_close_free(&rqst[2]);
3199 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3200 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3201 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3202 return rc;
3203 }
3204
3205 static struct cifs_ntsd *
get_smb2_acl_by_fid(struct cifs_sb_info * cifs_sb,const struct cifs_fid * cifsfid,u32 * pacllen)3206 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3207 const struct cifs_fid *cifsfid, u32 *pacllen)
3208 {
3209 struct cifs_ntsd *pntsd = NULL;
3210 unsigned int xid;
3211 int rc = -EOPNOTSUPP;
3212 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3213
3214 if (IS_ERR(tlink))
3215 return ERR_CAST(tlink);
3216
3217 xid = get_xid();
3218 cifs_dbg(FYI, "trying to get acl\n");
3219
3220 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3221 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
3222 free_xid(xid);
3223
3224 cifs_put_tlink(tlink);
3225
3226 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3227 if (rc)
3228 return ERR_PTR(rc);
3229 return pntsd;
3230
3231 }
3232
3233 static struct cifs_ntsd *
get_smb2_acl_by_path(struct cifs_sb_info * cifs_sb,const char * path,u32 * pacllen)3234 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3235 const char *path, u32 *pacllen)
3236 {
3237 struct cifs_ntsd *pntsd = NULL;
3238 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3239 unsigned int xid;
3240 int rc;
3241 struct cifs_tcon *tcon;
3242 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3243 struct cifs_fid fid;
3244 struct cifs_open_parms oparms;
3245 __le16 *utf16_path;
3246
3247 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3248 if (IS_ERR(tlink))
3249 return ERR_CAST(tlink);
3250
3251 tcon = tlink_tcon(tlink);
3252 xid = get_xid();
3253
3254 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3255 if (!utf16_path) {
3256 rc = -ENOMEM;
3257 free_xid(xid);
3258 return ERR_PTR(rc);
3259 }
3260
3261 oparms.tcon = tcon;
3262 oparms.desired_access = READ_CONTROL;
3263 oparms.disposition = FILE_OPEN;
3264 /*
3265 * When querying an ACL, even if the file is a symlink we want to open
3266 * the source not the target, and so the protocol requires that the
3267 * client specify this flag when opening a reparse point
3268 */
3269 oparms.create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT;
3270 oparms.fid = &fid;
3271 oparms.reconnect = false;
3272
3273 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3274 NULL);
3275 kfree(utf16_path);
3276 if (!rc) {
3277 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3278 fid.volatile_fid, (void **)&pntsd, pacllen);
3279 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3280 }
3281
3282 cifs_put_tlink(tlink);
3283 free_xid(xid);
3284
3285 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3286 if (rc)
3287 return ERR_PTR(rc);
3288 return pntsd;
3289 }
3290
3291 static int
set_smb2_acl(struct cifs_ntsd * pnntsd,__u32 acllen,struct inode * inode,const char * path,int aclflag)3292 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3293 struct inode *inode, const char *path, int aclflag)
3294 {
3295 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3296 unsigned int xid;
3297 int rc, access_flags = 0;
3298 struct cifs_tcon *tcon;
3299 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3300 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3301 struct cifs_fid fid;
3302 struct cifs_open_parms oparms;
3303 __le16 *utf16_path;
3304
3305 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3306 if (IS_ERR(tlink))
3307 return PTR_ERR(tlink);
3308
3309 tcon = tlink_tcon(tlink);
3310 xid = get_xid();
3311
3312 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
3313 access_flags = WRITE_OWNER;
3314 else
3315 access_flags = WRITE_DAC;
3316
3317 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3318 if (!utf16_path) {
3319 rc = -ENOMEM;
3320 free_xid(xid);
3321 return rc;
3322 }
3323
3324 oparms.tcon = tcon;
3325 oparms.desired_access = access_flags;
3326 oparms.create_options = cifs_create_options(cifs_sb, 0);
3327 oparms.disposition = FILE_OPEN;
3328 oparms.path = path;
3329 oparms.fid = &fid;
3330 oparms.reconnect = false;
3331
3332 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3333 NULL, NULL);
3334 kfree(utf16_path);
3335 if (!rc) {
3336 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3337 fid.volatile_fid, pnntsd, acllen, aclflag);
3338 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3339 }
3340
3341 cifs_put_tlink(tlink);
3342 free_xid(xid);
3343 return rc;
3344 }
3345
3346 /* Retrieve an ACL from the server */
3347 static struct cifs_ntsd *
get_smb2_acl(struct cifs_sb_info * cifs_sb,struct inode * inode,const char * path,u32 * pacllen)3348 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3349 struct inode *inode, const char *path,
3350 u32 *pacllen)
3351 {
3352 struct cifs_ntsd *pntsd = NULL;
3353 struct cifsFileInfo *open_file = NULL;
3354
3355 if (inode)
3356 open_file = find_readable_file(CIFS_I(inode), true);
3357 if (!open_file)
3358 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
3359
3360 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
3361 cifsFileInfo_put(open_file);
3362 return pntsd;
3363 }
3364
smb3_zero_range(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len,bool keep_size)3365 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3366 loff_t offset, loff_t len, bool keep_size)
3367 {
3368 struct cifs_ses *ses = tcon->ses;
3369 struct inode *inode;
3370 struct cifsInodeInfo *cifsi;
3371 struct cifsFileInfo *cfile = file->private_data;
3372 struct file_zero_data_information fsctl_buf;
3373 long rc;
3374 unsigned int xid;
3375 __le64 eof;
3376
3377 xid = get_xid();
3378
3379 inode = d_inode(cfile->dentry);
3380 cifsi = CIFS_I(inode);
3381
3382 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3383 ses->Suid, offset, len);
3384
3385 /*
3386 * We zero the range through ioctl, so we need remove the page caches
3387 * first, otherwise the data may be inconsistent with the server.
3388 */
3389 truncate_pagecache_range(inode, offset, offset + len - 1);
3390
3391 /* if file not oplocked can't be sure whether asking to extend size */
3392 if (!CIFS_CACHE_READ(cifsi))
3393 if (keep_size == false) {
3394 rc = -EOPNOTSUPP;
3395 trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
3396 tcon->tid, ses->Suid, offset, len, rc);
3397 free_xid(xid);
3398 return rc;
3399 }
3400
3401 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3402
3403 fsctl_buf.FileOffset = cpu_to_le64(offset);
3404 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3405
3406 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3407 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3408 (char *)&fsctl_buf,
3409 sizeof(struct file_zero_data_information),
3410 0, NULL, NULL);
3411 if (rc)
3412 goto zero_range_exit;
3413
3414 /*
3415 * do we also need to change the size of the file?
3416 */
3417 if (keep_size == false && i_size_read(inode) < offset + len) {
3418 eof = cpu_to_le64(offset + len);
3419 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3420 cfile->fid.volatile_fid, cfile->pid, &eof);
3421 }
3422
3423 zero_range_exit:
3424 free_xid(xid);
3425 if (rc)
3426 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3427 ses->Suid, offset, len, rc);
3428 else
3429 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3430 ses->Suid, offset, len);
3431 return rc;
3432 }
3433
smb3_punch_hole(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len)3434 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3435 loff_t offset, loff_t len)
3436 {
3437 struct inode *inode = file_inode(file);
3438 struct cifsFileInfo *cfile = file->private_data;
3439 struct file_zero_data_information fsctl_buf;
3440 long rc;
3441 unsigned int xid;
3442 __u8 set_sparse = 1;
3443
3444 xid = get_xid();
3445
3446 inode_lock(inode);
3447 /* Need to make file sparse, if not already, before freeing range. */
3448 /* Consider adding equivalent for compressed since it could also work */
3449 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3450 rc = -EOPNOTSUPP;
3451 goto out;
3452 }
3453
3454 /*
3455 * We implement the punch hole through ioctl, so we need remove the page
3456 * caches first, otherwise the data may be inconsistent with the server.
3457 */
3458 truncate_pagecache_range(inode, offset, offset + len - 1);
3459
3460 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3461
3462 fsctl_buf.FileOffset = cpu_to_le64(offset);
3463 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3464
3465 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3466 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3467 (char *)&fsctl_buf,
3468 sizeof(struct file_zero_data_information),
3469 CIFSMaxBufSize, NULL, NULL);
3470 out:
3471 inode_unlock(inode);
3472 free_xid(xid);
3473 return rc;
3474 }
3475
smb3_simple_fallocate_write_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len,char * buf)3476 static int smb3_simple_fallocate_write_range(unsigned int xid,
3477 struct cifs_tcon *tcon,
3478 struct cifsFileInfo *cfile,
3479 loff_t off, loff_t len,
3480 char *buf)
3481 {
3482 struct cifs_io_parms io_parms = {0};
3483 int nbytes;
3484 int rc = 0;
3485 struct kvec iov[2];
3486
3487 io_parms.netfid = cfile->fid.netfid;
3488 io_parms.pid = current->tgid;
3489 io_parms.tcon = tcon;
3490 io_parms.persistent_fid = cfile->fid.persistent_fid;
3491 io_parms.volatile_fid = cfile->fid.volatile_fid;
3492
3493 while (len) {
3494 io_parms.offset = off;
3495 io_parms.length = len;
3496 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3497 io_parms.length = SMB2_MAX_BUFFER_SIZE;
3498 /* iov[0] is reserved for smb header */
3499 iov[1].iov_base = buf;
3500 iov[1].iov_len = io_parms.length;
3501 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3502 if (rc)
3503 break;
3504 if (nbytes > len)
3505 return -EINVAL;
3506 buf += nbytes;
3507 off += nbytes;
3508 len -= nbytes;
3509 }
3510 return rc;
3511 }
3512
smb3_simple_fallocate_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len)3513 static int smb3_simple_fallocate_range(unsigned int xid,
3514 struct cifs_tcon *tcon,
3515 struct cifsFileInfo *cfile,
3516 loff_t off, loff_t len)
3517 {
3518 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3519 u32 out_data_len;
3520 char *buf = NULL;
3521 loff_t l;
3522 int rc;
3523
3524 in_data.file_offset = cpu_to_le64(off);
3525 in_data.length = cpu_to_le64(len);
3526 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3527 cfile->fid.volatile_fid,
3528 FSCTL_QUERY_ALLOCATED_RANGES,
3529 (char *)&in_data, sizeof(in_data),
3530 1024 * sizeof(struct file_allocated_range_buffer),
3531 (char **)&out_data, &out_data_len);
3532 if (rc)
3533 goto out;
3534
3535 buf = kzalloc(1024 * 1024, GFP_KERNEL);
3536 if (buf == NULL) {
3537 rc = -ENOMEM;
3538 goto out;
3539 }
3540
3541 tmp_data = out_data;
3542 while (len) {
3543 /*
3544 * The rest of the region is unmapped so write it all.
3545 */
3546 if (out_data_len == 0) {
3547 rc = smb3_simple_fallocate_write_range(xid, tcon,
3548 cfile, off, len, buf);
3549 goto out;
3550 }
3551
3552 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3553 rc = -EINVAL;
3554 goto out;
3555 }
3556
3557 if (off < le64_to_cpu(tmp_data->file_offset)) {
3558 /*
3559 * We are at a hole. Write until the end of the region
3560 * or until the next allocated data,
3561 * whichever comes next.
3562 */
3563 l = le64_to_cpu(tmp_data->file_offset) - off;
3564 if (len < l)
3565 l = len;
3566 rc = smb3_simple_fallocate_write_range(xid, tcon,
3567 cfile, off, l, buf);
3568 if (rc)
3569 goto out;
3570 off = off + l;
3571 len = len - l;
3572 if (len == 0)
3573 goto out;
3574 }
3575 /*
3576 * We are at a section of allocated data, just skip forward
3577 * until the end of the data or the end of the region
3578 * we are supposed to fallocate, whichever comes first.
3579 */
3580 l = le64_to_cpu(tmp_data->length);
3581 if (len < l)
3582 l = len;
3583 off += l;
3584 len -= l;
3585
3586 tmp_data = &tmp_data[1];
3587 out_data_len -= sizeof(struct file_allocated_range_buffer);
3588 }
3589
3590 out:
3591 kfree(out_data);
3592 kfree(buf);
3593 return rc;
3594 }
3595
3596
smb3_simple_falloc(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len,bool keep_size)3597 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3598 loff_t off, loff_t len, bool keep_size)
3599 {
3600 struct inode *inode;
3601 struct cifsInodeInfo *cifsi;
3602 struct cifsFileInfo *cfile = file->private_data;
3603 long rc = -EOPNOTSUPP;
3604 unsigned int xid;
3605 __le64 eof;
3606
3607 xid = get_xid();
3608
3609 inode = d_inode(cfile->dentry);
3610 cifsi = CIFS_I(inode);
3611
3612 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3613 tcon->ses->Suid, off, len);
3614 /* if file not oplocked can't be sure whether asking to extend size */
3615 if (!CIFS_CACHE_READ(cifsi))
3616 if (keep_size == false) {
3617 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3618 tcon->tid, tcon->ses->Suid, off, len, rc);
3619 free_xid(xid);
3620 return rc;
3621 }
3622
3623 /*
3624 * Extending the file
3625 */
3626 if ((keep_size == false) && i_size_read(inode) < off + len) {
3627 rc = inode_newsize_ok(inode, off + len);
3628 if (rc)
3629 goto out;
3630
3631 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3632 smb2_set_sparse(xid, tcon, cfile, inode, false);
3633
3634 eof = cpu_to_le64(off + len);
3635 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3636 cfile->fid.volatile_fid, cfile->pid, &eof);
3637 if (rc == 0) {
3638 cifsi->server_eof = off + len;
3639 cifs_setsize(inode, off + len);
3640 cifs_truncate_page(inode->i_mapping, inode->i_size);
3641 truncate_setsize(inode, off + len);
3642 }
3643 goto out;
3644 }
3645
3646 /*
3647 * Files are non-sparse by default so falloc may be a no-op
3648 * Must check if file sparse. If not sparse, and since we are not
3649 * extending then no need to do anything since file already allocated
3650 */
3651 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3652 rc = 0;
3653 goto out;
3654 }
3655
3656 if (keep_size == true) {
3657 /*
3658 * We can not preallocate pages beyond the end of the file
3659 * in SMB2
3660 */
3661 if (off >= i_size_read(inode)) {
3662 rc = 0;
3663 goto out;
3664 }
3665 /*
3666 * For fallocates that are partially beyond the end of file,
3667 * clamp len so we only fallocate up to the end of file.
3668 */
3669 if (off + len > i_size_read(inode)) {
3670 len = i_size_read(inode) - off;
3671 }
3672 }
3673
3674 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3675 /*
3676 * At this point, we are trying to fallocate an internal
3677 * regions of a sparse file. Since smb2 does not have a
3678 * fallocate command we have two otions on how to emulate this.
3679 * We can either turn the entire file to become non-sparse
3680 * which we only do if the fallocate is for virtually
3681 * the whole file, or we can overwrite the region with zeroes
3682 * using SMB2_write, which could be prohibitevly expensive
3683 * if len is large.
3684 */
3685 /*
3686 * We are only trying to fallocate a small region so
3687 * just write it with zero.
3688 */
3689 if (len <= 1024 * 1024) {
3690 rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3691 off, len);
3692 goto out;
3693 }
3694
3695 /*
3696 * Check if falloc starts within first few pages of file
3697 * and ends within a few pages of the end of file to
3698 * ensure that most of file is being forced to be
3699 * fallocated now. If so then setting whole file sparse
3700 * ie potentially making a few extra pages at the beginning
3701 * or end of the file non-sparse via set_sparse is harmless.
3702 */
3703 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3704 rc = -EOPNOTSUPP;
3705 goto out;
3706 }
3707 }
3708
3709 smb2_set_sparse(xid, tcon, cfile, inode, false);
3710 rc = 0;
3711
3712 out:
3713 if (rc)
3714 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3715 tcon->ses->Suid, off, len, rc);
3716 else
3717 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3718 tcon->ses->Suid, off, len);
3719
3720 free_xid(xid);
3721 return rc;
3722 }
3723
smb3_llseek(struct file * file,struct cifs_tcon * tcon,loff_t offset,int whence)3724 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3725 {
3726 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3727 struct cifsInodeInfo *cifsi;
3728 struct inode *inode;
3729 int rc = 0;
3730 struct file_allocated_range_buffer in_data, *out_data = NULL;
3731 u32 out_data_len;
3732 unsigned int xid;
3733
3734 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3735 return generic_file_llseek(file, offset, whence);
3736
3737 inode = d_inode(cfile->dentry);
3738 cifsi = CIFS_I(inode);
3739
3740 if (offset < 0 || offset >= i_size_read(inode))
3741 return -ENXIO;
3742
3743 xid = get_xid();
3744 /*
3745 * We need to be sure that all dirty pages are written as they
3746 * might fill holes on the server.
3747 * Note that we also MUST flush any written pages since at least
3748 * some servers (Windows2016) will not reflect recent writes in
3749 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3750 */
3751 wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3752 if (wrcfile) {
3753 filemap_write_and_wait(inode->i_mapping);
3754 smb2_flush_file(xid, tcon, &wrcfile->fid);
3755 cifsFileInfo_put(wrcfile);
3756 }
3757
3758 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3759 if (whence == SEEK_HOLE)
3760 offset = i_size_read(inode);
3761 goto lseek_exit;
3762 }
3763
3764 in_data.file_offset = cpu_to_le64(offset);
3765 in_data.length = cpu_to_le64(i_size_read(inode));
3766
3767 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3768 cfile->fid.volatile_fid,
3769 FSCTL_QUERY_ALLOCATED_RANGES,
3770 (char *)&in_data, sizeof(in_data),
3771 sizeof(struct file_allocated_range_buffer),
3772 (char **)&out_data, &out_data_len);
3773 if (rc == -E2BIG)
3774 rc = 0;
3775 if (rc)
3776 goto lseek_exit;
3777
3778 if (whence == SEEK_HOLE && out_data_len == 0)
3779 goto lseek_exit;
3780
3781 if (whence == SEEK_DATA && out_data_len == 0) {
3782 rc = -ENXIO;
3783 goto lseek_exit;
3784 }
3785
3786 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3787 rc = -EINVAL;
3788 goto lseek_exit;
3789 }
3790 if (whence == SEEK_DATA) {
3791 offset = le64_to_cpu(out_data->file_offset);
3792 goto lseek_exit;
3793 }
3794 if (offset < le64_to_cpu(out_data->file_offset))
3795 goto lseek_exit;
3796
3797 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3798
3799 lseek_exit:
3800 free_xid(xid);
3801 kfree(out_data);
3802 if (!rc)
3803 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3804 else
3805 return rc;
3806 }
3807
smb3_fiemap(struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct fiemap_extent_info * fei,u64 start,u64 len)3808 static int smb3_fiemap(struct cifs_tcon *tcon,
3809 struct cifsFileInfo *cfile,
3810 struct fiemap_extent_info *fei, u64 start, u64 len)
3811 {
3812 unsigned int xid;
3813 struct file_allocated_range_buffer in_data, *out_data;
3814 u32 out_data_len;
3815 int i, num, rc, flags, last_blob;
3816 u64 next;
3817
3818 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3819 if (rc)
3820 return rc;
3821
3822 xid = get_xid();
3823 again:
3824 in_data.file_offset = cpu_to_le64(start);
3825 in_data.length = cpu_to_le64(len);
3826
3827 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3828 cfile->fid.volatile_fid,
3829 FSCTL_QUERY_ALLOCATED_RANGES,
3830 (char *)&in_data, sizeof(in_data),
3831 1024 * sizeof(struct file_allocated_range_buffer),
3832 (char **)&out_data, &out_data_len);
3833 if (rc == -E2BIG) {
3834 last_blob = 0;
3835 rc = 0;
3836 } else
3837 last_blob = 1;
3838 if (rc)
3839 goto out;
3840
3841 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3842 rc = -EINVAL;
3843 goto out;
3844 }
3845 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3846 rc = -EINVAL;
3847 goto out;
3848 }
3849
3850 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3851 for (i = 0; i < num; i++) {
3852 flags = 0;
3853 if (i == num - 1 && last_blob)
3854 flags |= FIEMAP_EXTENT_LAST;
3855
3856 rc = fiemap_fill_next_extent(fei,
3857 le64_to_cpu(out_data[i].file_offset),
3858 le64_to_cpu(out_data[i].file_offset),
3859 le64_to_cpu(out_data[i].length),
3860 flags);
3861 if (rc < 0)
3862 goto out;
3863 if (rc == 1) {
3864 rc = 0;
3865 goto out;
3866 }
3867 }
3868
3869 if (!last_blob) {
3870 next = le64_to_cpu(out_data[num - 1].file_offset) +
3871 le64_to_cpu(out_data[num - 1].length);
3872 len = len - (next - start);
3873 start = next;
3874 goto again;
3875 }
3876
3877 out:
3878 free_xid(xid);
3879 kfree(out_data);
3880 return rc;
3881 }
3882
smb3_fallocate(struct file * file,struct cifs_tcon * tcon,int mode,loff_t off,loff_t len)3883 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3884 loff_t off, loff_t len)
3885 {
3886 /* KEEP_SIZE already checked for by do_fallocate */
3887 if (mode & FALLOC_FL_PUNCH_HOLE)
3888 return smb3_punch_hole(file, tcon, off, len);
3889 else if (mode & FALLOC_FL_ZERO_RANGE) {
3890 if (mode & FALLOC_FL_KEEP_SIZE)
3891 return smb3_zero_range(file, tcon, off, len, true);
3892 return smb3_zero_range(file, tcon, off, len, false);
3893 } else if (mode == FALLOC_FL_KEEP_SIZE)
3894 return smb3_simple_falloc(file, tcon, off, len, true);
3895 else if (mode == 0)
3896 return smb3_simple_falloc(file, tcon, off, len, false);
3897
3898 return -EOPNOTSUPP;
3899 }
3900
3901 static void
smb2_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3902 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3903 struct cifsInodeInfo *cinode, __u32 oplock,
3904 unsigned int epoch, bool *purge_cache)
3905 {
3906 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3907 }
3908
3909 static void
3910 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3911 unsigned int epoch, bool *purge_cache);
3912
3913 static void
smb3_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3914 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3915 struct cifsInodeInfo *cinode, __u32 oplock,
3916 unsigned int epoch, bool *purge_cache)
3917 {
3918 unsigned int old_state = cinode->oplock;
3919 unsigned int old_epoch = cinode->epoch;
3920 unsigned int new_state;
3921
3922 if (epoch > old_epoch) {
3923 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3924 cinode->epoch = epoch;
3925 }
3926
3927 new_state = cinode->oplock;
3928 *purge_cache = false;
3929
3930 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3931 (new_state & CIFS_CACHE_READ_FLG) == 0)
3932 *purge_cache = true;
3933 else if (old_state == new_state && (epoch - old_epoch > 1))
3934 *purge_cache = true;
3935 }
3936
3937 static void
smb2_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3938 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3939 unsigned int epoch, bool *purge_cache)
3940 {
3941 oplock &= 0xFF;
3942 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3943 return;
3944 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3945 cinode->oplock = CIFS_CACHE_RHW_FLG;
3946 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3947 &cinode->vfs_inode);
3948 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3949 cinode->oplock = CIFS_CACHE_RW_FLG;
3950 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3951 &cinode->vfs_inode);
3952 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3953 cinode->oplock = CIFS_CACHE_READ_FLG;
3954 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3955 &cinode->vfs_inode);
3956 } else
3957 cinode->oplock = 0;
3958 }
3959
3960 static void
smb21_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3961 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3962 unsigned int epoch, bool *purge_cache)
3963 {
3964 char message[5] = {0};
3965 unsigned int new_oplock = 0;
3966
3967 oplock &= 0xFF;
3968 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3969 return;
3970
3971 /* Check if the server granted an oplock rather than a lease */
3972 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3973 return smb2_set_oplock_level(cinode, oplock, epoch,
3974 purge_cache);
3975
3976 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3977 new_oplock |= CIFS_CACHE_READ_FLG;
3978 strcat(message, "R");
3979 }
3980 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3981 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3982 strcat(message, "H");
3983 }
3984 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3985 new_oplock |= CIFS_CACHE_WRITE_FLG;
3986 strcat(message, "W");
3987 }
3988 if (!new_oplock)
3989 strncpy(message, "None", sizeof(message));
3990
3991 cinode->oplock = new_oplock;
3992 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3993 &cinode->vfs_inode);
3994 }
3995
3996 static void
smb3_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3997 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3998 unsigned int epoch, bool *purge_cache)
3999 {
4000 unsigned int old_oplock = cinode->oplock;
4001
4002 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4003
4004 if (purge_cache) {
4005 *purge_cache = false;
4006 if (old_oplock == CIFS_CACHE_READ_FLG) {
4007 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4008 (epoch - cinode->epoch > 0))
4009 *purge_cache = true;
4010 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4011 (epoch - cinode->epoch > 1))
4012 *purge_cache = true;
4013 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4014 (epoch - cinode->epoch > 1))
4015 *purge_cache = true;
4016 else if (cinode->oplock == 0 &&
4017 (epoch - cinode->epoch > 0))
4018 *purge_cache = true;
4019 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4020 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4021 (epoch - cinode->epoch > 0))
4022 *purge_cache = true;
4023 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4024 (epoch - cinode->epoch > 1))
4025 *purge_cache = true;
4026 }
4027 cinode->epoch = epoch;
4028 }
4029 }
4030
4031 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4032 static bool
smb2_is_read_op(__u32 oplock)4033 smb2_is_read_op(__u32 oplock)
4034 {
4035 return oplock == SMB2_OPLOCK_LEVEL_II;
4036 }
4037 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4038
4039 static bool
smb21_is_read_op(__u32 oplock)4040 smb21_is_read_op(__u32 oplock)
4041 {
4042 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4043 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4044 }
4045
4046 static __le32
map_oplock_to_lease(u8 oplock)4047 map_oplock_to_lease(u8 oplock)
4048 {
4049 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4050 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
4051 else if (oplock == SMB2_OPLOCK_LEVEL_II)
4052 return SMB2_LEASE_READ_CACHING;
4053 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4054 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
4055 SMB2_LEASE_WRITE_CACHING;
4056 return 0;
4057 }
4058
4059 static char *
smb2_create_lease_buf(u8 * lease_key,u8 oplock)4060 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4061 {
4062 struct create_lease *buf;
4063
4064 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4065 if (!buf)
4066 return NULL;
4067
4068 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4069 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4070
4071 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4072 (struct create_lease, lcontext));
4073 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4074 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4075 (struct create_lease, Name));
4076 buf->ccontext.NameLength = cpu_to_le16(4);
4077 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4078 buf->Name[0] = 'R';
4079 buf->Name[1] = 'q';
4080 buf->Name[2] = 'L';
4081 buf->Name[3] = 's';
4082 return (char *)buf;
4083 }
4084
4085 static char *
smb3_create_lease_buf(u8 * lease_key,u8 oplock)4086 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4087 {
4088 struct create_lease_v2 *buf;
4089
4090 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4091 if (!buf)
4092 return NULL;
4093
4094 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4095 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4096
4097 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4098 (struct create_lease_v2, lcontext));
4099 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4100 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4101 (struct create_lease_v2, Name));
4102 buf->ccontext.NameLength = cpu_to_le16(4);
4103 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4104 buf->Name[0] = 'R';
4105 buf->Name[1] = 'q';
4106 buf->Name[2] = 'L';
4107 buf->Name[3] = 's';
4108 return (char *)buf;
4109 }
4110
4111 static __u8
smb2_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4112 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4113 {
4114 struct create_lease *lc = (struct create_lease *)buf;
4115
4116 *epoch = 0; /* not used */
4117 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4118 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4119 return le32_to_cpu(lc->lcontext.LeaseState);
4120 }
4121
4122 static __u8
smb3_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4123 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4124 {
4125 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4126
4127 *epoch = le16_to_cpu(lc->lcontext.Epoch);
4128 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
4129 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4130 if (lease_key)
4131 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4132 return le32_to_cpu(lc->lcontext.LeaseState);
4133 }
4134
4135 static unsigned int
smb2_wp_retry_size(struct inode * inode)4136 smb2_wp_retry_size(struct inode *inode)
4137 {
4138 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
4139 SMB2_MAX_BUFFER_SIZE);
4140 }
4141
4142 static bool
smb2_dir_needs_close(struct cifsFileInfo * cfile)4143 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4144 {
4145 return !cfile->invalidHandle;
4146 }
4147
4148 static void
fill_transform_hdr(struct smb2_transform_hdr * tr_hdr,unsigned int orig_len,struct smb_rqst * old_rq,__le16 cipher_type)4149 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4150 struct smb_rqst *old_rq, __le16 cipher_type)
4151 {
4152 struct smb2_sync_hdr *shdr =
4153 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
4154
4155 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4156 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4157 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4158 tr_hdr->Flags = cpu_to_le16(0x01);
4159 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4160 (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4161 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4162 else
4163 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4164 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4165 }
4166
smb2_aead_req_alloc(struct crypto_aead * tfm,const struct smb_rqst * rqst,int num_rqst,const u8 * sig,u8 ** iv,struct aead_request ** req,struct scatterlist ** sgl,unsigned int * num_sgs)4167 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4168 int num_rqst, const u8 *sig, u8 **iv,
4169 struct aead_request **req, struct scatterlist **sgl,
4170 unsigned int *num_sgs)
4171 {
4172 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4173 unsigned int iv_size = crypto_aead_ivsize(tfm);
4174 unsigned int len;
4175 u8 *p;
4176
4177 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4178
4179 len = iv_size;
4180 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4181 len = ALIGN(len, crypto_tfm_ctx_alignment());
4182 len += req_size;
4183 len = ALIGN(len, __alignof__(struct scatterlist));
4184 len += *num_sgs * sizeof(**sgl);
4185
4186 p = kmalloc(len, GFP_ATOMIC);
4187 if (!p)
4188 return NULL;
4189
4190 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4191 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4192 crypto_tfm_ctx_alignment());
4193 *sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4194 __alignof__(struct scatterlist));
4195 return p;
4196 }
4197
smb2_get_aead_req(struct crypto_aead * tfm,const struct smb_rqst * rqst,int num_rqst,const u8 * sig,u8 ** iv,struct aead_request ** req,struct scatterlist ** sgl)4198 static void *smb2_get_aead_req(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4199 int num_rqst, const u8 *sig, u8 **iv,
4200 struct aead_request **req, struct scatterlist **sgl)
4201 {
4202 unsigned int off, len, skip;
4203 struct scatterlist *sg;
4204 unsigned int num_sgs;
4205 unsigned long addr;
4206 int i, j;
4207 void *p;
4208
4209 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, sgl, &num_sgs);
4210 if (!p)
4211 return NULL;
4212
4213 sg_init_table(*sgl, num_sgs);
4214 sg = *sgl;
4215
4216 /* Assumes the first rqst has a transform header as the first iov.
4217 * I.e.
4218 * rqst[0].rq_iov[0] is transform header
4219 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
4220 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
4221 */
4222 for (i = 0; i < num_rqst; i++) {
4223 /*
4224 * The first rqst has a transform header where the
4225 * first 20 bytes are not part of the encrypted blob.
4226 */
4227 for (j = 0; j < rqst[i].rq_nvec; j++) {
4228 struct kvec *iov = &rqst[i].rq_iov[j];
4229
4230 skip = (i == 0) && (j == 0) ? 20 : 0;
4231 addr = (unsigned long)iov->iov_base + skip;
4232 len = iov->iov_len - skip;
4233 sg = cifs_sg_set_buf(sg, (void *)addr, len);
4234 }
4235 for (j = 0; j < rqst[i].rq_npages; j++) {
4236 rqst_page_get_length(&rqst[i], j, &len, &off);
4237 sg_set_page(sg++, rqst[i].rq_pages[j], len, off);
4238 }
4239 }
4240 cifs_sg_set_buf(sg, sig, SMB2_SIGNATURE_SIZE);
4241
4242 return p;
4243 }
4244
4245 static int
smb2_get_enc_key(struct TCP_Server_Info * server,__u64 ses_id,int enc,u8 * key)4246 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4247 {
4248 struct cifs_ses *ses;
4249 u8 *ses_enc_key;
4250
4251 spin_lock(&cifs_tcp_ses_lock);
4252 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
4253 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
4254 if (ses->Suid == ses_id) {
4255 ses_enc_key = enc ? ses->smb3encryptionkey :
4256 ses->smb3decryptionkey;
4257 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4258 spin_unlock(&cifs_tcp_ses_lock);
4259 return 0;
4260 }
4261 }
4262 }
4263 spin_unlock(&cifs_tcp_ses_lock);
4264
4265 return -EAGAIN;
4266 }
4267 /*
4268 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4269 * iov[0] - transform header (associate data),
4270 * iov[1-N] - SMB2 header and pages - data to encrypt.
4271 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4272 * untouched.
4273 */
4274 static int
crypt_message(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * rqst,int enc)4275 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4276 struct smb_rqst *rqst, int enc)
4277 {
4278 struct smb2_transform_hdr *tr_hdr =
4279 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4280 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4281 int rc = 0;
4282 struct scatterlist *sg;
4283 u8 sign[SMB2_SIGNATURE_SIZE] = {};
4284 u8 key[SMB3_ENC_DEC_KEY_SIZE];
4285 struct aead_request *req;
4286 u8 *iv;
4287 DECLARE_CRYPTO_WAIT(wait);
4288 struct crypto_aead *tfm;
4289 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4290 void *creq;
4291
4292 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
4293 if (rc) {
4294 cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
4295 enc ? "en" : "de");
4296 return rc;
4297 }
4298
4299 rc = smb3_crypto_aead_allocate(server);
4300 if (rc) {
4301 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4302 return rc;
4303 }
4304
4305 tfm = enc ? server->secmech.ccmaesencrypt :
4306 server->secmech.ccmaesdecrypt;
4307
4308 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4309 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4310 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4311 else
4312 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4313
4314 if (rc) {
4315 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4316 return rc;
4317 }
4318
4319 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4320 if (rc) {
4321 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4322 return rc;
4323 }
4324
4325 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg);
4326 if (unlikely(!creq))
4327 return -ENOMEM;
4328
4329 if (!enc) {
4330 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4331 crypt_len += SMB2_SIGNATURE_SIZE;
4332 }
4333
4334 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4335 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4336 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4337 else {
4338 iv[0] = 3;
4339 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4340 }
4341
4342 aead_request_set_tfm(req, tfm);
4343 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4344 aead_request_set_ad(req, assoc_data_len);
4345
4346 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4347 crypto_req_done, &wait);
4348
4349 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4350 : crypto_aead_decrypt(req), &wait);
4351
4352 if (!rc && enc)
4353 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4354
4355 kfree_sensitive(creq);
4356 return rc;
4357 }
4358
4359 void
smb3_free_compound_rqst(int num_rqst,struct smb_rqst * rqst)4360 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4361 {
4362 int i, j;
4363
4364 for (i = 0; i < num_rqst; i++) {
4365 if (rqst[i].rq_pages) {
4366 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
4367 put_page(rqst[i].rq_pages[j]);
4368 kfree(rqst[i].rq_pages);
4369 }
4370 }
4371 }
4372
4373 /*
4374 * This function will initialize new_rq and encrypt the content.
4375 * The first entry, new_rq[0], only contains a single iov which contains
4376 * a smb2_transform_hdr and is pre-allocated by the caller.
4377 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4378 *
4379 * The end result is an array of smb_rqst structures where the first structure
4380 * only contains a single iov for the transform header which we then can pass
4381 * to crypt_message().
4382 *
4383 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4384 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4385 */
4386 static int
smb3_init_transform_rq(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * new_rq,struct smb_rqst * old_rq)4387 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4388 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4389 {
4390 struct page **pages;
4391 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4392 unsigned int npages;
4393 unsigned int orig_len = 0;
4394 int i, j;
4395 int rc = -ENOMEM;
4396
4397 for (i = 1; i < num_rqst; i++) {
4398 npages = old_rq[i - 1].rq_npages;
4399 pages = kmalloc_array(npages, sizeof(struct page *),
4400 GFP_KERNEL);
4401 if (!pages)
4402 goto err_free;
4403
4404 new_rq[i].rq_pages = pages;
4405 new_rq[i].rq_npages = npages;
4406 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
4407 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
4408 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
4409 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
4410 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
4411
4412 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
4413
4414 for (j = 0; j < npages; j++) {
4415 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4416 if (!pages[j])
4417 goto err_free;
4418 }
4419
4420 /* copy pages form the old */
4421 for (j = 0; j < npages; j++) {
4422 char *dst, *src;
4423 unsigned int offset, len;
4424
4425 rqst_page_get_length(&new_rq[i], j, &len, &offset);
4426
4427 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
4428 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
4429
4430 memcpy(dst, src, len);
4431 kunmap(new_rq[i].rq_pages[j]);
4432 kunmap(old_rq[i - 1].rq_pages[j]);
4433 }
4434 }
4435
4436 /* fill the 1st iov with a transform header */
4437 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4438
4439 rc = crypt_message(server, num_rqst, new_rq, 1);
4440 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4441 if (rc)
4442 goto err_free;
4443
4444 return rc;
4445
4446 err_free:
4447 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4448 return rc;
4449 }
4450
4451 static int
smb3_is_transform_hdr(void * buf)4452 smb3_is_transform_hdr(void *buf)
4453 {
4454 struct smb2_transform_hdr *trhdr = buf;
4455
4456 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4457 }
4458
4459 static int
decrypt_raw_data(struct TCP_Server_Info * server,char * buf,unsigned int buf_data_size,struct page ** pages,unsigned int npages,unsigned int page_data_size,bool is_offloaded)4460 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4461 unsigned int buf_data_size, struct page **pages,
4462 unsigned int npages, unsigned int page_data_size,
4463 bool is_offloaded)
4464 {
4465 struct kvec iov[2];
4466 struct smb_rqst rqst = {NULL};
4467 int rc;
4468
4469 iov[0].iov_base = buf;
4470 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4471 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4472 iov[1].iov_len = buf_data_size;
4473
4474 rqst.rq_iov = iov;
4475 rqst.rq_nvec = 2;
4476 rqst.rq_pages = pages;
4477 rqst.rq_npages = npages;
4478 rqst.rq_pagesz = PAGE_SIZE;
4479 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
4480
4481 rc = crypt_message(server, 1, &rqst, 0);
4482 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4483
4484 if (rc)
4485 return rc;
4486
4487 memmove(buf, iov[1].iov_base, buf_data_size);
4488
4489 if (!is_offloaded)
4490 server->total_read = buf_data_size + page_data_size;
4491
4492 return rc;
4493 }
4494
4495 static int
read_data_into_pages(struct TCP_Server_Info * server,struct page ** pages,unsigned int npages,unsigned int len)4496 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
4497 unsigned int npages, unsigned int len)
4498 {
4499 int i;
4500 int length;
4501
4502 for (i = 0; i < npages; i++) {
4503 struct page *page = pages[i];
4504 size_t n;
4505
4506 n = len;
4507 if (len >= PAGE_SIZE) {
4508 /* enough data to fill the page */
4509 n = PAGE_SIZE;
4510 len -= n;
4511 } else {
4512 zero_user(page, len, PAGE_SIZE - len);
4513 len = 0;
4514 }
4515 length = cifs_read_page_from_socket(server, page, 0, n);
4516 if (length < 0)
4517 return length;
4518 server->total_read += length;
4519 }
4520
4521 return 0;
4522 }
4523
4524 static int
init_read_bvec(struct page ** pages,unsigned int npages,unsigned int data_size,unsigned int cur_off,struct bio_vec ** page_vec)4525 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
4526 unsigned int cur_off, struct bio_vec **page_vec)
4527 {
4528 struct bio_vec *bvec;
4529 int i;
4530
4531 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
4532 if (!bvec)
4533 return -ENOMEM;
4534
4535 for (i = 0; i < npages; i++) {
4536 bvec[i].bv_page = pages[i];
4537 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
4538 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
4539 data_size -= bvec[i].bv_len;
4540 }
4541
4542 if (data_size != 0) {
4543 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4544 kfree(bvec);
4545 return -EIO;
4546 }
4547
4548 *page_vec = bvec;
4549 return 0;
4550 }
4551
4552 static int
handle_read_data(struct TCP_Server_Info * server,struct mid_q_entry * mid,char * buf,unsigned int buf_len,struct page ** pages,unsigned int npages,unsigned int page_data_size,bool is_offloaded)4553 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4554 char *buf, unsigned int buf_len, struct page **pages,
4555 unsigned int npages, unsigned int page_data_size,
4556 bool is_offloaded)
4557 {
4558 unsigned int data_offset;
4559 unsigned int data_len;
4560 unsigned int cur_off;
4561 unsigned int cur_page_idx;
4562 unsigned int pad_len;
4563 struct cifs_readdata *rdata = mid->callback_data;
4564 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
4565 struct bio_vec *bvec = NULL;
4566 struct iov_iter iter;
4567 struct kvec iov;
4568 int length;
4569 bool use_rdma_mr = false;
4570
4571 if (shdr->Command != SMB2_READ) {
4572 cifs_server_dbg(VFS, "only big read responses are supported\n");
4573 return -ENOTSUPP;
4574 }
4575
4576 if (server->ops->is_session_expired &&
4577 server->ops->is_session_expired(buf)) {
4578 if (!is_offloaded)
4579 cifs_reconnect(server);
4580 return -1;
4581 }
4582
4583 if (server->ops->is_status_pending &&
4584 server->ops->is_status_pending(buf, server))
4585 return -1;
4586
4587 /* set up first two iov to get credits */
4588 rdata->iov[0].iov_base = buf;
4589 rdata->iov[0].iov_len = 0;
4590 rdata->iov[1].iov_base = buf;
4591 rdata->iov[1].iov_len =
4592 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4593 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4594 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4595 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4596 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4597
4598 rdata->result = server->ops->map_error(buf, true);
4599 if (rdata->result != 0) {
4600 cifs_dbg(FYI, "%s: server returned error %d\n",
4601 __func__, rdata->result);
4602 /* normal error on read response */
4603 if (is_offloaded)
4604 mid->mid_state = MID_RESPONSE_RECEIVED;
4605 else
4606 dequeue_mid(mid, false);
4607 return 0;
4608 }
4609
4610 data_offset = server->ops->read_data_offset(buf);
4611 #ifdef CONFIG_CIFS_SMB_DIRECT
4612 use_rdma_mr = rdata->mr;
4613 #endif
4614 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4615
4616 if (data_offset < server->vals->read_rsp_size) {
4617 /*
4618 * win2k8 sometimes sends an offset of 0 when the read
4619 * is beyond the EOF. Treat it as if the data starts just after
4620 * the header.
4621 */
4622 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4623 __func__, data_offset);
4624 data_offset = server->vals->read_rsp_size;
4625 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4626 /* data_offset is beyond the end of smallbuf */
4627 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4628 __func__, data_offset);
4629 rdata->result = -EIO;
4630 if (is_offloaded)
4631 mid->mid_state = MID_RESPONSE_MALFORMED;
4632 else
4633 dequeue_mid(mid, rdata->result);
4634 return 0;
4635 }
4636
4637 pad_len = data_offset - server->vals->read_rsp_size;
4638
4639 if (buf_len <= data_offset) {
4640 /* read response payload is in pages */
4641 cur_page_idx = pad_len / PAGE_SIZE;
4642 cur_off = pad_len % PAGE_SIZE;
4643
4644 if (cur_page_idx != 0) {
4645 /* data offset is beyond the 1st page of response */
4646 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4647 __func__, data_offset);
4648 rdata->result = -EIO;
4649 if (is_offloaded)
4650 mid->mid_state = MID_RESPONSE_MALFORMED;
4651 else
4652 dequeue_mid(mid, rdata->result);
4653 return 0;
4654 }
4655
4656 if (data_len > page_data_size - pad_len) {
4657 /* data_len is corrupt -- discard frame */
4658 rdata->result = -EIO;
4659 if (is_offloaded)
4660 mid->mid_state = MID_RESPONSE_MALFORMED;
4661 else
4662 dequeue_mid(mid, rdata->result);
4663 return 0;
4664 }
4665
4666 rdata->result = init_read_bvec(pages, npages, page_data_size,
4667 cur_off, &bvec);
4668 if (rdata->result != 0) {
4669 if (is_offloaded)
4670 mid->mid_state = MID_RESPONSE_MALFORMED;
4671 else
4672 dequeue_mid(mid, rdata->result);
4673 return 0;
4674 }
4675
4676 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
4677 } else if (buf_len >= data_offset + data_len) {
4678 /* read response payload is in buf */
4679 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
4680 iov.iov_base = buf + data_offset;
4681 iov.iov_len = data_len;
4682 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
4683 } else {
4684 /* read response payload cannot be in both buf and pages */
4685 WARN_ONCE(1, "buf can not contain only a part of read data");
4686 rdata->result = -EIO;
4687 if (is_offloaded)
4688 mid->mid_state = MID_RESPONSE_MALFORMED;
4689 else
4690 dequeue_mid(mid, rdata->result);
4691 return 0;
4692 }
4693
4694 length = rdata->copy_into_pages(server, rdata, &iter);
4695
4696 kfree(bvec);
4697
4698 if (length < 0)
4699 return length;
4700
4701 if (is_offloaded)
4702 mid->mid_state = MID_RESPONSE_RECEIVED;
4703 else
4704 dequeue_mid(mid, false);
4705 return length;
4706 }
4707
4708 struct smb2_decrypt_work {
4709 struct work_struct decrypt;
4710 struct TCP_Server_Info *server;
4711 struct page **ppages;
4712 char *buf;
4713 unsigned int npages;
4714 unsigned int len;
4715 };
4716
4717
smb2_decrypt_offload(struct work_struct * work)4718 static void smb2_decrypt_offload(struct work_struct *work)
4719 {
4720 struct smb2_decrypt_work *dw = container_of(work,
4721 struct smb2_decrypt_work, decrypt);
4722 int i, rc;
4723 struct mid_q_entry *mid;
4724
4725 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4726 dw->ppages, dw->npages, dw->len, true);
4727 if (rc) {
4728 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4729 goto free_pages;
4730 }
4731
4732 dw->server->lstrp = jiffies;
4733 mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4734 if (mid == NULL)
4735 cifs_dbg(FYI, "mid not found\n");
4736 else {
4737 mid->decrypted = true;
4738 rc = handle_read_data(dw->server, mid, dw->buf,
4739 dw->server->vals->read_rsp_size,
4740 dw->ppages, dw->npages, dw->len,
4741 true);
4742 if (rc >= 0) {
4743 #ifdef CONFIG_CIFS_STATS2
4744 mid->when_received = jiffies;
4745 #endif
4746 mid->callback(mid);
4747 } else {
4748 spin_lock(&GlobalMid_Lock);
4749 if (dw->server->tcpStatus == CifsNeedReconnect) {
4750 mid->mid_state = MID_RETRY_NEEDED;
4751 spin_unlock(&GlobalMid_Lock);
4752 mid->callback(mid);
4753 } else {
4754 mid->mid_state = MID_REQUEST_SUBMITTED;
4755 mid->mid_flags &= ~(MID_DELETED);
4756 list_add_tail(&mid->qhead,
4757 &dw->server->pending_mid_q);
4758 spin_unlock(&GlobalMid_Lock);
4759 }
4760 }
4761 cifs_mid_q_entry_release(mid);
4762 }
4763
4764 free_pages:
4765 for (i = dw->npages-1; i >= 0; i--)
4766 put_page(dw->ppages[i]);
4767
4768 kfree(dw->ppages);
4769 cifs_small_buf_release(dw->buf);
4770 kfree(dw);
4771 }
4772
4773
4774 static int
receive_encrypted_read(struct TCP_Server_Info * server,struct mid_q_entry ** mid,int * num_mids)4775 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4776 int *num_mids)
4777 {
4778 char *buf = server->smallbuf;
4779 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4780 unsigned int npages;
4781 struct page **pages;
4782 unsigned int len;
4783 unsigned int buflen = server->pdu_size;
4784 int rc;
4785 int i = 0;
4786 struct smb2_decrypt_work *dw;
4787
4788 *num_mids = 1;
4789 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4790 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4791
4792 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4793 if (rc < 0)
4794 return rc;
4795 server->total_read += rc;
4796
4797 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4798 server->vals->read_rsp_size;
4799 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4800
4801 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4802 if (!pages) {
4803 rc = -ENOMEM;
4804 goto discard_data;
4805 }
4806
4807 for (; i < npages; i++) {
4808 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4809 if (!pages[i]) {
4810 rc = -ENOMEM;
4811 goto discard_data;
4812 }
4813 }
4814
4815 /* read read data into pages */
4816 rc = read_data_into_pages(server, pages, npages, len);
4817 if (rc)
4818 goto free_pages;
4819
4820 rc = cifs_discard_remaining_data(server);
4821 if (rc)
4822 goto free_pages;
4823
4824 /*
4825 * For large reads, offload to different thread for better performance,
4826 * use more cores decrypting which can be expensive
4827 */
4828
4829 if ((server->min_offload) && (server->in_flight > 1) &&
4830 (server->pdu_size >= server->min_offload)) {
4831 dw = kmalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4832 if (dw == NULL)
4833 goto non_offloaded_decrypt;
4834
4835 dw->buf = server->smallbuf;
4836 server->smallbuf = (char *)cifs_small_buf_get();
4837
4838 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4839
4840 dw->npages = npages;
4841 dw->server = server;
4842 dw->ppages = pages;
4843 dw->len = len;
4844 queue_work(decrypt_wq, &dw->decrypt);
4845 *num_mids = 0; /* worker thread takes care of finding mid */
4846 return -1;
4847 }
4848
4849 non_offloaded_decrypt:
4850 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4851 pages, npages, len, false);
4852 if (rc)
4853 goto free_pages;
4854
4855 *mid = smb2_find_mid(server, buf);
4856 if (*mid == NULL)
4857 cifs_dbg(FYI, "mid not found\n");
4858 else {
4859 cifs_dbg(FYI, "mid found\n");
4860 (*mid)->decrypted = true;
4861 rc = handle_read_data(server, *mid, buf,
4862 server->vals->read_rsp_size,
4863 pages, npages, len, false);
4864 }
4865
4866 free_pages:
4867 for (i = i - 1; i >= 0; i--)
4868 put_page(pages[i]);
4869 kfree(pages);
4870 return rc;
4871 discard_data:
4872 cifs_discard_remaining_data(server);
4873 goto free_pages;
4874 }
4875
4876 static int
receive_encrypted_standard(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)4877 receive_encrypted_standard(struct TCP_Server_Info *server,
4878 struct mid_q_entry **mids, char **bufs,
4879 int *num_mids)
4880 {
4881 int ret, length;
4882 char *buf = server->smallbuf;
4883 struct smb2_sync_hdr *shdr;
4884 unsigned int pdu_length = server->pdu_size;
4885 unsigned int buf_size;
4886 struct mid_q_entry *mid_entry;
4887 int next_is_large;
4888 char *next_buffer = NULL;
4889
4890 *num_mids = 0;
4891
4892 /* switch to large buffer if too big for a small one */
4893 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4894 server->large_buf = true;
4895 memcpy(server->bigbuf, buf, server->total_read);
4896 buf = server->bigbuf;
4897 }
4898
4899 /* now read the rest */
4900 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4901 pdu_length - HEADER_SIZE(server) + 1);
4902 if (length < 0)
4903 return length;
4904 server->total_read += length;
4905
4906 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4907 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0, false);
4908 if (length)
4909 return length;
4910
4911 next_is_large = server->large_buf;
4912 one_more:
4913 shdr = (struct smb2_sync_hdr *)buf;
4914 if (shdr->NextCommand) {
4915 if (next_is_large)
4916 next_buffer = (char *)cifs_buf_get();
4917 else
4918 next_buffer = (char *)cifs_small_buf_get();
4919 memcpy(next_buffer,
4920 buf + le32_to_cpu(shdr->NextCommand),
4921 pdu_length - le32_to_cpu(shdr->NextCommand));
4922 }
4923
4924 mid_entry = smb2_find_mid(server, buf);
4925 if (mid_entry == NULL)
4926 cifs_dbg(FYI, "mid not found\n");
4927 else {
4928 cifs_dbg(FYI, "mid found\n");
4929 mid_entry->decrypted = true;
4930 mid_entry->resp_buf_size = server->pdu_size;
4931 }
4932
4933 if (*num_mids >= MAX_COMPOUND) {
4934 cifs_server_dbg(VFS, "too many PDUs in compound\n");
4935 return -1;
4936 }
4937 bufs[*num_mids] = buf;
4938 mids[(*num_mids)++] = mid_entry;
4939
4940 if (mid_entry && mid_entry->handle)
4941 ret = mid_entry->handle(server, mid_entry);
4942 else
4943 ret = cifs_handle_standard(server, mid_entry);
4944
4945 if (ret == 0 && shdr->NextCommand) {
4946 pdu_length -= le32_to_cpu(shdr->NextCommand);
4947 server->large_buf = next_is_large;
4948 if (next_is_large)
4949 server->bigbuf = buf = next_buffer;
4950 else
4951 server->smallbuf = buf = next_buffer;
4952 goto one_more;
4953 } else if (ret != 0) {
4954 /*
4955 * ret != 0 here means that we didn't get to handle_mid() thus
4956 * server->smallbuf and server->bigbuf are still valid. We need
4957 * to free next_buffer because it is not going to be used
4958 * anywhere.
4959 */
4960 if (next_is_large)
4961 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
4962 else
4963 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
4964 }
4965
4966 return ret;
4967 }
4968
4969 static int
smb3_receive_transform(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)4970 smb3_receive_transform(struct TCP_Server_Info *server,
4971 struct mid_q_entry **mids, char **bufs, int *num_mids)
4972 {
4973 char *buf = server->smallbuf;
4974 unsigned int pdu_length = server->pdu_size;
4975 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4976 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4977
4978 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4979 sizeof(struct smb2_sync_hdr)) {
4980 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
4981 pdu_length);
4982 cifs_reconnect(server);
4983 return -ECONNABORTED;
4984 }
4985
4986 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4987 cifs_server_dbg(VFS, "Transform message is broken\n");
4988 cifs_reconnect(server);
4989 return -ECONNABORTED;
4990 }
4991
4992 /* TODO: add support for compounds containing READ. */
4993 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4994 return receive_encrypted_read(server, &mids[0], num_mids);
4995 }
4996
4997 return receive_encrypted_standard(server, mids, bufs, num_mids);
4998 }
4999
5000 int
smb3_handle_read_data(struct TCP_Server_Info * server,struct mid_q_entry * mid)5001 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5002 {
5003 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5004
5005 return handle_read_data(server, mid, buf, server->pdu_size,
5006 NULL, 0, 0, false);
5007 }
5008
5009 static int
smb2_next_header(char * buf)5010 smb2_next_header(char *buf)
5011 {
5012 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
5013 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5014
5015 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
5016 return sizeof(struct smb2_transform_hdr) +
5017 le32_to_cpu(t_hdr->OriginalMessageSize);
5018
5019 return le32_to_cpu(hdr->NextCommand);
5020 }
5021
5022 static int
smb2_make_node(unsigned int xid,struct inode * inode,struct dentry * dentry,struct cifs_tcon * tcon,char * full_path,umode_t mode,dev_t dev)5023 smb2_make_node(unsigned int xid, struct inode *inode,
5024 struct dentry *dentry, struct cifs_tcon *tcon,
5025 char *full_path, umode_t mode, dev_t dev)
5026 {
5027 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5028 int rc = -EPERM;
5029 FILE_ALL_INFO *buf = NULL;
5030 struct cifs_io_parms io_parms = {0};
5031 __u32 oplock = 0;
5032 struct cifs_fid fid;
5033 struct cifs_open_parms oparms;
5034 unsigned int bytes_written;
5035 struct win_dev *pdev;
5036 struct kvec iov[2];
5037
5038 /*
5039 * Check if mounted with mount parm 'sfu' mount parm.
5040 * SFU emulation should work with all servers, but only
5041 * supports block and char device (no socket & fifo),
5042 * and was used by default in earlier versions of Windows
5043 */
5044 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5045 goto out;
5046
5047 /*
5048 * TODO: Add ability to create instead via reparse point. Windows (e.g.
5049 * their current NFS server) uses this approach to expose special files
5050 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5051 */
5052
5053 if (!S_ISCHR(mode) && !S_ISBLK(mode))
5054 goto out;
5055
5056 cifs_dbg(FYI, "sfu compat create special file\n");
5057
5058 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
5059 if (buf == NULL) {
5060 rc = -ENOMEM;
5061 goto out;
5062 }
5063
5064 oparms.tcon = tcon;
5065 oparms.cifs_sb = cifs_sb;
5066 oparms.desired_access = GENERIC_WRITE;
5067 oparms.create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5068 CREATE_OPTION_SPECIAL);
5069 oparms.disposition = FILE_CREATE;
5070 oparms.path = full_path;
5071 oparms.fid = &fid;
5072 oparms.reconnect = false;
5073
5074 if (tcon->ses->server->oplocks)
5075 oplock = REQ_OPLOCK;
5076 else
5077 oplock = 0;
5078 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
5079 if (rc)
5080 goto out;
5081
5082 /*
5083 * BB Do not bother to decode buf since no local inode yet to put
5084 * timestamps in, but we can reuse it safely.
5085 */
5086
5087 pdev = (struct win_dev *)buf;
5088 io_parms.pid = current->tgid;
5089 io_parms.tcon = tcon;
5090 io_parms.offset = 0;
5091 io_parms.length = sizeof(struct win_dev);
5092 iov[1].iov_base = buf;
5093 iov[1].iov_len = sizeof(struct win_dev);
5094 if (S_ISCHR(mode)) {
5095 memcpy(pdev->type, "IntxCHR", 8);
5096 pdev->major = cpu_to_le64(MAJOR(dev));
5097 pdev->minor = cpu_to_le64(MINOR(dev));
5098 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5099 &bytes_written, iov, 1);
5100 } else if (S_ISBLK(mode)) {
5101 memcpy(pdev->type, "IntxBLK", 8);
5102 pdev->major = cpu_to_le64(MAJOR(dev));
5103 pdev->minor = cpu_to_le64(MINOR(dev));
5104 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5105 &bytes_written, iov, 1);
5106 }
5107 tcon->ses->server->ops->close(xid, tcon, &fid);
5108 d_drop(dentry);
5109
5110 /* FIXME: add code here to set EAs */
5111 out:
5112 kfree(buf);
5113 return rc;
5114 }
5115
5116 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5117 struct smb_version_operations smb20_operations = {
5118 .compare_fids = smb2_compare_fids,
5119 .setup_request = smb2_setup_request,
5120 .setup_async_request = smb2_setup_async_request,
5121 .check_receive = smb2_check_receive,
5122 .add_credits = smb2_add_credits,
5123 .set_credits = smb2_set_credits,
5124 .get_credits_field = smb2_get_credits_field,
5125 .get_credits = smb2_get_credits,
5126 .wait_mtu_credits = cifs_wait_mtu_credits,
5127 .get_next_mid = smb2_get_next_mid,
5128 .revert_current_mid = smb2_revert_current_mid,
5129 .read_data_offset = smb2_read_data_offset,
5130 .read_data_length = smb2_read_data_length,
5131 .map_error = map_smb2_to_linux_error,
5132 .find_mid = smb2_find_mid,
5133 .check_message = smb2_check_message,
5134 .dump_detail = smb2_dump_detail,
5135 .clear_stats = smb2_clear_stats,
5136 .print_stats = smb2_print_stats,
5137 .is_oplock_break = smb2_is_valid_oplock_break,
5138 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5139 .downgrade_oplock = smb2_downgrade_oplock,
5140 .need_neg = smb2_need_neg,
5141 .negotiate = smb2_negotiate,
5142 .negotiate_wsize = smb2_negotiate_wsize,
5143 .negotiate_rsize = smb2_negotiate_rsize,
5144 .sess_setup = SMB2_sess_setup,
5145 .logoff = SMB2_logoff,
5146 .tree_connect = SMB2_tcon,
5147 .tree_disconnect = SMB2_tdis,
5148 .qfs_tcon = smb2_qfs_tcon,
5149 .is_path_accessible = smb2_is_path_accessible,
5150 .can_echo = smb2_can_echo,
5151 .echo = SMB2_echo,
5152 .query_path_info = smb2_query_path_info,
5153 .get_srv_inum = smb2_get_srv_inum,
5154 .query_file_info = smb2_query_file_info,
5155 .set_path_size = smb2_set_path_size,
5156 .set_file_size = smb2_set_file_size,
5157 .set_file_info = smb2_set_file_info,
5158 .set_compression = smb2_set_compression,
5159 .mkdir = smb2_mkdir,
5160 .mkdir_setinfo = smb2_mkdir_setinfo,
5161 .rmdir = smb2_rmdir,
5162 .unlink = smb2_unlink,
5163 .rename = smb2_rename_path,
5164 .create_hardlink = smb2_create_hardlink,
5165 .query_symlink = smb2_query_symlink,
5166 .query_mf_symlink = smb3_query_mf_symlink,
5167 .create_mf_symlink = smb3_create_mf_symlink,
5168 .open = smb2_open_file,
5169 .set_fid = smb2_set_fid,
5170 .close = smb2_close_file,
5171 .flush = smb2_flush_file,
5172 .async_readv = smb2_async_readv,
5173 .async_writev = smb2_async_writev,
5174 .sync_read = smb2_sync_read,
5175 .sync_write = smb2_sync_write,
5176 .query_dir_first = smb2_query_dir_first,
5177 .query_dir_next = smb2_query_dir_next,
5178 .close_dir = smb2_close_dir,
5179 .calc_smb_size = smb2_calc_size,
5180 .is_status_pending = smb2_is_status_pending,
5181 .is_session_expired = smb2_is_session_expired,
5182 .oplock_response = smb2_oplock_response,
5183 .queryfs = smb2_queryfs,
5184 .mand_lock = smb2_mand_lock,
5185 .mand_unlock_range = smb2_unlock_range,
5186 .push_mand_locks = smb2_push_mandatory_locks,
5187 .get_lease_key = smb2_get_lease_key,
5188 .set_lease_key = smb2_set_lease_key,
5189 .new_lease_key = smb2_new_lease_key,
5190 .calc_signature = smb2_calc_signature,
5191 .is_read_op = smb2_is_read_op,
5192 .set_oplock_level = smb2_set_oplock_level,
5193 .create_lease_buf = smb2_create_lease_buf,
5194 .parse_lease_buf = smb2_parse_lease_buf,
5195 .copychunk_range = smb2_copychunk_range,
5196 .wp_retry_size = smb2_wp_retry_size,
5197 .dir_needs_close = smb2_dir_needs_close,
5198 .get_dfs_refer = smb2_get_dfs_refer,
5199 .select_sectype = smb2_select_sectype,
5200 #ifdef CONFIG_CIFS_XATTR
5201 .query_all_EAs = smb2_query_eas,
5202 .set_EA = smb2_set_ea,
5203 #endif /* CIFS_XATTR */
5204 .get_acl = get_smb2_acl,
5205 .get_acl_by_fid = get_smb2_acl_by_fid,
5206 .set_acl = set_smb2_acl,
5207 .next_header = smb2_next_header,
5208 .ioctl_query_info = smb2_ioctl_query_info,
5209 .make_node = smb2_make_node,
5210 .fiemap = smb3_fiemap,
5211 .llseek = smb3_llseek,
5212 .is_status_io_timeout = smb2_is_status_io_timeout,
5213 };
5214 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5215
5216 struct smb_version_operations smb21_operations = {
5217 .compare_fids = smb2_compare_fids,
5218 .setup_request = smb2_setup_request,
5219 .setup_async_request = smb2_setup_async_request,
5220 .check_receive = smb2_check_receive,
5221 .add_credits = smb2_add_credits,
5222 .set_credits = smb2_set_credits,
5223 .get_credits_field = smb2_get_credits_field,
5224 .get_credits = smb2_get_credits,
5225 .wait_mtu_credits = smb2_wait_mtu_credits,
5226 .adjust_credits = smb2_adjust_credits,
5227 .get_next_mid = smb2_get_next_mid,
5228 .revert_current_mid = smb2_revert_current_mid,
5229 .read_data_offset = smb2_read_data_offset,
5230 .read_data_length = smb2_read_data_length,
5231 .map_error = map_smb2_to_linux_error,
5232 .find_mid = smb2_find_mid,
5233 .check_message = smb2_check_message,
5234 .dump_detail = smb2_dump_detail,
5235 .clear_stats = smb2_clear_stats,
5236 .print_stats = smb2_print_stats,
5237 .is_oplock_break = smb2_is_valid_oplock_break,
5238 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5239 .downgrade_oplock = smb2_downgrade_oplock,
5240 .need_neg = smb2_need_neg,
5241 .negotiate = smb2_negotiate,
5242 .negotiate_wsize = smb2_negotiate_wsize,
5243 .negotiate_rsize = smb2_negotiate_rsize,
5244 .sess_setup = SMB2_sess_setup,
5245 .logoff = SMB2_logoff,
5246 .tree_connect = SMB2_tcon,
5247 .tree_disconnect = SMB2_tdis,
5248 .qfs_tcon = smb2_qfs_tcon,
5249 .is_path_accessible = smb2_is_path_accessible,
5250 .can_echo = smb2_can_echo,
5251 .echo = SMB2_echo,
5252 .query_path_info = smb2_query_path_info,
5253 .get_srv_inum = smb2_get_srv_inum,
5254 .query_file_info = smb2_query_file_info,
5255 .set_path_size = smb2_set_path_size,
5256 .set_file_size = smb2_set_file_size,
5257 .set_file_info = smb2_set_file_info,
5258 .set_compression = smb2_set_compression,
5259 .mkdir = smb2_mkdir,
5260 .mkdir_setinfo = smb2_mkdir_setinfo,
5261 .rmdir = smb2_rmdir,
5262 .unlink = smb2_unlink,
5263 .rename = smb2_rename_path,
5264 .create_hardlink = smb2_create_hardlink,
5265 .query_symlink = smb2_query_symlink,
5266 .query_mf_symlink = smb3_query_mf_symlink,
5267 .create_mf_symlink = smb3_create_mf_symlink,
5268 .open = smb2_open_file,
5269 .set_fid = smb2_set_fid,
5270 .close = smb2_close_file,
5271 .flush = smb2_flush_file,
5272 .async_readv = smb2_async_readv,
5273 .async_writev = smb2_async_writev,
5274 .sync_read = smb2_sync_read,
5275 .sync_write = smb2_sync_write,
5276 .query_dir_first = smb2_query_dir_first,
5277 .query_dir_next = smb2_query_dir_next,
5278 .close_dir = smb2_close_dir,
5279 .calc_smb_size = smb2_calc_size,
5280 .is_status_pending = smb2_is_status_pending,
5281 .is_session_expired = smb2_is_session_expired,
5282 .oplock_response = smb2_oplock_response,
5283 .queryfs = smb2_queryfs,
5284 .mand_lock = smb2_mand_lock,
5285 .mand_unlock_range = smb2_unlock_range,
5286 .push_mand_locks = smb2_push_mandatory_locks,
5287 .get_lease_key = smb2_get_lease_key,
5288 .set_lease_key = smb2_set_lease_key,
5289 .new_lease_key = smb2_new_lease_key,
5290 .calc_signature = smb2_calc_signature,
5291 .is_read_op = smb21_is_read_op,
5292 .set_oplock_level = smb21_set_oplock_level,
5293 .create_lease_buf = smb2_create_lease_buf,
5294 .parse_lease_buf = smb2_parse_lease_buf,
5295 .copychunk_range = smb2_copychunk_range,
5296 .wp_retry_size = smb2_wp_retry_size,
5297 .dir_needs_close = smb2_dir_needs_close,
5298 .enum_snapshots = smb3_enum_snapshots,
5299 .notify = smb3_notify,
5300 .get_dfs_refer = smb2_get_dfs_refer,
5301 .select_sectype = smb2_select_sectype,
5302 #ifdef CONFIG_CIFS_XATTR
5303 .query_all_EAs = smb2_query_eas,
5304 .set_EA = smb2_set_ea,
5305 #endif /* CIFS_XATTR */
5306 .get_acl = get_smb2_acl,
5307 .get_acl_by_fid = get_smb2_acl_by_fid,
5308 .set_acl = set_smb2_acl,
5309 .next_header = smb2_next_header,
5310 .ioctl_query_info = smb2_ioctl_query_info,
5311 .make_node = smb2_make_node,
5312 .fiemap = smb3_fiemap,
5313 .llseek = smb3_llseek,
5314 .is_status_io_timeout = smb2_is_status_io_timeout,
5315 };
5316
5317 struct smb_version_operations smb30_operations = {
5318 .compare_fids = smb2_compare_fids,
5319 .setup_request = smb2_setup_request,
5320 .setup_async_request = smb2_setup_async_request,
5321 .check_receive = smb2_check_receive,
5322 .add_credits = smb2_add_credits,
5323 .set_credits = smb2_set_credits,
5324 .get_credits_field = smb2_get_credits_field,
5325 .get_credits = smb2_get_credits,
5326 .wait_mtu_credits = smb2_wait_mtu_credits,
5327 .adjust_credits = smb2_adjust_credits,
5328 .get_next_mid = smb2_get_next_mid,
5329 .revert_current_mid = smb2_revert_current_mid,
5330 .read_data_offset = smb2_read_data_offset,
5331 .read_data_length = smb2_read_data_length,
5332 .map_error = map_smb2_to_linux_error,
5333 .find_mid = smb2_find_mid,
5334 .check_message = smb2_check_message,
5335 .dump_detail = smb2_dump_detail,
5336 .clear_stats = smb2_clear_stats,
5337 .print_stats = smb2_print_stats,
5338 .dump_share_caps = smb2_dump_share_caps,
5339 .is_oplock_break = smb2_is_valid_oplock_break,
5340 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5341 .downgrade_oplock = smb3_downgrade_oplock,
5342 .need_neg = smb2_need_neg,
5343 .negotiate = smb2_negotiate,
5344 .negotiate_wsize = smb3_negotiate_wsize,
5345 .negotiate_rsize = smb3_negotiate_rsize,
5346 .sess_setup = SMB2_sess_setup,
5347 .logoff = SMB2_logoff,
5348 .tree_connect = SMB2_tcon,
5349 .tree_disconnect = SMB2_tdis,
5350 .qfs_tcon = smb3_qfs_tcon,
5351 .is_path_accessible = smb2_is_path_accessible,
5352 .can_echo = smb2_can_echo,
5353 .echo = SMB2_echo,
5354 .query_path_info = smb2_query_path_info,
5355 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5356 .query_reparse_tag = smb2_query_reparse_tag,
5357 .get_srv_inum = smb2_get_srv_inum,
5358 .query_file_info = smb2_query_file_info,
5359 .set_path_size = smb2_set_path_size,
5360 .set_file_size = smb2_set_file_size,
5361 .set_file_info = smb2_set_file_info,
5362 .set_compression = smb2_set_compression,
5363 .mkdir = smb2_mkdir,
5364 .mkdir_setinfo = smb2_mkdir_setinfo,
5365 .rmdir = smb2_rmdir,
5366 .unlink = smb2_unlink,
5367 .rename = smb2_rename_path,
5368 .create_hardlink = smb2_create_hardlink,
5369 .query_symlink = smb2_query_symlink,
5370 .query_mf_symlink = smb3_query_mf_symlink,
5371 .create_mf_symlink = smb3_create_mf_symlink,
5372 .open = smb2_open_file,
5373 .set_fid = smb2_set_fid,
5374 .close = smb2_close_file,
5375 .close_getattr = smb2_close_getattr,
5376 .flush = smb2_flush_file,
5377 .async_readv = smb2_async_readv,
5378 .async_writev = smb2_async_writev,
5379 .sync_read = smb2_sync_read,
5380 .sync_write = smb2_sync_write,
5381 .query_dir_first = smb2_query_dir_first,
5382 .query_dir_next = smb2_query_dir_next,
5383 .close_dir = smb2_close_dir,
5384 .calc_smb_size = smb2_calc_size,
5385 .is_status_pending = smb2_is_status_pending,
5386 .is_session_expired = smb2_is_session_expired,
5387 .oplock_response = smb2_oplock_response,
5388 .queryfs = smb2_queryfs,
5389 .mand_lock = smb2_mand_lock,
5390 .mand_unlock_range = smb2_unlock_range,
5391 .push_mand_locks = smb2_push_mandatory_locks,
5392 .get_lease_key = smb2_get_lease_key,
5393 .set_lease_key = smb2_set_lease_key,
5394 .new_lease_key = smb2_new_lease_key,
5395 .generate_signingkey = generate_smb30signingkey,
5396 .calc_signature = smb3_calc_signature,
5397 .set_integrity = smb3_set_integrity,
5398 .is_read_op = smb21_is_read_op,
5399 .set_oplock_level = smb3_set_oplock_level,
5400 .create_lease_buf = smb3_create_lease_buf,
5401 .parse_lease_buf = smb3_parse_lease_buf,
5402 .copychunk_range = smb2_copychunk_range,
5403 .duplicate_extents = smb2_duplicate_extents,
5404 .validate_negotiate = smb3_validate_negotiate,
5405 .wp_retry_size = smb2_wp_retry_size,
5406 .dir_needs_close = smb2_dir_needs_close,
5407 .fallocate = smb3_fallocate,
5408 .enum_snapshots = smb3_enum_snapshots,
5409 .notify = smb3_notify,
5410 .init_transform_rq = smb3_init_transform_rq,
5411 .is_transform_hdr = smb3_is_transform_hdr,
5412 .receive_transform = smb3_receive_transform,
5413 .get_dfs_refer = smb2_get_dfs_refer,
5414 .select_sectype = smb2_select_sectype,
5415 #ifdef CONFIG_CIFS_XATTR
5416 .query_all_EAs = smb2_query_eas,
5417 .set_EA = smb2_set_ea,
5418 #endif /* CIFS_XATTR */
5419 .get_acl = get_smb2_acl,
5420 .get_acl_by_fid = get_smb2_acl_by_fid,
5421 .set_acl = set_smb2_acl,
5422 .next_header = smb2_next_header,
5423 .ioctl_query_info = smb2_ioctl_query_info,
5424 .make_node = smb2_make_node,
5425 .fiemap = smb3_fiemap,
5426 .llseek = smb3_llseek,
5427 .is_status_io_timeout = smb2_is_status_io_timeout,
5428 };
5429
5430 struct smb_version_operations smb311_operations = {
5431 .compare_fids = smb2_compare_fids,
5432 .setup_request = smb2_setup_request,
5433 .setup_async_request = smb2_setup_async_request,
5434 .check_receive = smb2_check_receive,
5435 .add_credits = smb2_add_credits,
5436 .set_credits = smb2_set_credits,
5437 .get_credits_field = smb2_get_credits_field,
5438 .get_credits = smb2_get_credits,
5439 .wait_mtu_credits = smb2_wait_mtu_credits,
5440 .adjust_credits = smb2_adjust_credits,
5441 .get_next_mid = smb2_get_next_mid,
5442 .revert_current_mid = smb2_revert_current_mid,
5443 .read_data_offset = smb2_read_data_offset,
5444 .read_data_length = smb2_read_data_length,
5445 .map_error = map_smb2_to_linux_error,
5446 .find_mid = smb2_find_mid,
5447 .check_message = smb2_check_message,
5448 .dump_detail = smb2_dump_detail,
5449 .clear_stats = smb2_clear_stats,
5450 .print_stats = smb2_print_stats,
5451 .dump_share_caps = smb2_dump_share_caps,
5452 .is_oplock_break = smb2_is_valid_oplock_break,
5453 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5454 .downgrade_oplock = smb3_downgrade_oplock,
5455 .need_neg = smb2_need_neg,
5456 .negotiate = smb2_negotiate,
5457 .negotiate_wsize = smb3_negotiate_wsize,
5458 .negotiate_rsize = smb3_negotiate_rsize,
5459 .sess_setup = SMB2_sess_setup,
5460 .logoff = SMB2_logoff,
5461 .tree_connect = SMB2_tcon,
5462 .tree_disconnect = SMB2_tdis,
5463 .qfs_tcon = smb3_qfs_tcon,
5464 .is_path_accessible = smb2_is_path_accessible,
5465 .can_echo = smb2_can_echo,
5466 .echo = SMB2_echo,
5467 .query_path_info = smb2_query_path_info,
5468 .query_reparse_tag = smb2_query_reparse_tag,
5469 .get_srv_inum = smb2_get_srv_inum,
5470 .query_file_info = smb2_query_file_info,
5471 .set_path_size = smb2_set_path_size,
5472 .set_file_size = smb2_set_file_size,
5473 .set_file_info = smb2_set_file_info,
5474 .set_compression = smb2_set_compression,
5475 .mkdir = smb2_mkdir,
5476 .mkdir_setinfo = smb2_mkdir_setinfo,
5477 .posix_mkdir = smb311_posix_mkdir,
5478 .rmdir = smb2_rmdir,
5479 .unlink = smb2_unlink,
5480 .rename = smb2_rename_path,
5481 .create_hardlink = smb2_create_hardlink,
5482 .query_symlink = smb2_query_symlink,
5483 .query_mf_symlink = smb3_query_mf_symlink,
5484 .create_mf_symlink = smb3_create_mf_symlink,
5485 .open = smb2_open_file,
5486 .set_fid = smb2_set_fid,
5487 .close = smb2_close_file,
5488 .close_getattr = smb2_close_getattr,
5489 .flush = smb2_flush_file,
5490 .async_readv = smb2_async_readv,
5491 .async_writev = smb2_async_writev,
5492 .sync_read = smb2_sync_read,
5493 .sync_write = smb2_sync_write,
5494 .query_dir_first = smb2_query_dir_first,
5495 .query_dir_next = smb2_query_dir_next,
5496 .close_dir = smb2_close_dir,
5497 .calc_smb_size = smb2_calc_size,
5498 .is_status_pending = smb2_is_status_pending,
5499 .is_session_expired = smb2_is_session_expired,
5500 .oplock_response = smb2_oplock_response,
5501 .queryfs = smb311_queryfs,
5502 .mand_lock = smb2_mand_lock,
5503 .mand_unlock_range = smb2_unlock_range,
5504 .push_mand_locks = smb2_push_mandatory_locks,
5505 .get_lease_key = smb2_get_lease_key,
5506 .set_lease_key = smb2_set_lease_key,
5507 .new_lease_key = smb2_new_lease_key,
5508 .generate_signingkey = generate_smb311signingkey,
5509 .calc_signature = smb3_calc_signature,
5510 .set_integrity = smb3_set_integrity,
5511 .is_read_op = smb21_is_read_op,
5512 .set_oplock_level = smb3_set_oplock_level,
5513 .create_lease_buf = smb3_create_lease_buf,
5514 .parse_lease_buf = smb3_parse_lease_buf,
5515 .copychunk_range = smb2_copychunk_range,
5516 .duplicate_extents = smb2_duplicate_extents,
5517 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5518 .wp_retry_size = smb2_wp_retry_size,
5519 .dir_needs_close = smb2_dir_needs_close,
5520 .fallocate = smb3_fallocate,
5521 .enum_snapshots = smb3_enum_snapshots,
5522 .notify = smb3_notify,
5523 .init_transform_rq = smb3_init_transform_rq,
5524 .is_transform_hdr = smb3_is_transform_hdr,
5525 .receive_transform = smb3_receive_transform,
5526 .get_dfs_refer = smb2_get_dfs_refer,
5527 .select_sectype = smb2_select_sectype,
5528 #ifdef CONFIG_CIFS_XATTR
5529 .query_all_EAs = smb2_query_eas,
5530 .set_EA = smb2_set_ea,
5531 #endif /* CIFS_XATTR */
5532 .get_acl = get_smb2_acl,
5533 .get_acl_by_fid = get_smb2_acl_by_fid,
5534 .set_acl = set_smb2_acl,
5535 .next_header = smb2_next_header,
5536 .ioctl_query_info = smb2_ioctl_query_info,
5537 .make_node = smb2_make_node,
5538 .fiemap = smb3_fiemap,
5539 .llseek = smb3_llseek,
5540 .is_status_io_timeout = smb2_is_status_io_timeout,
5541 };
5542
5543 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5544 struct smb_version_values smb20_values = {
5545 .version_string = SMB20_VERSION_STRING,
5546 .protocol_id = SMB20_PROT_ID,
5547 .req_capabilities = 0, /* MBZ */
5548 .large_lock_type = 0,
5549 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5550 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5551 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5552 .header_size = sizeof(struct smb2_sync_hdr),
5553 .header_preamble_size = 0,
5554 .max_header_size = MAX_SMB2_HDR_SIZE,
5555 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5556 .lock_cmd = SMB2_LOCK,
5557 .cap_unix = 0,
5558 .cap_nt_find = SMB2_NT_FIND,
5559 .cap_large_files = SMB2_LARGE_FILES,
5560 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5561 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5562 .create_lease_size = sizeof(struct create_lease),
5563 };
5564 #endif /* ALLOW_INSECURE_LEGACY */
5565
5566 struct smb_version_values smb21_values = {
5567 .version_string = SMB21_VERSION_STRING,
5568 .protocol_id = SMB21_PROT_ID,
5569 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5570 .large_lock_type = 0,
5571 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5572 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5573 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5574 .header_size = sizeof(struct smb2_sync_hdr),
5575 .header_preamble_size = 0,
5576 .max_header_size = MAX_SMB2_HDR_SIZE,
5577 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5578 .lock_cmd = SMB2_LOCK,
5579 .cap_unix = 0,
5580 .cap_nt_find = SMB2_NT_FIND,
5581 .cap_large_files = SMB2_LARGE_FILES,
5582 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5583 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5584 .create_lease_size = sizeof(struct create_lease),
5585 };
5586
5587 struct smb_version_values smb3any_values = {
5588 .version_string = SMB3ANY_VERSION_STRING,
5589 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5590 .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,
5591 .large_lock_type = 0,
5592 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5593 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5594 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5595 .header_size = sizeof(struct smb2_sync_hdr),
5596 .header_preamble_size = 0,
5597 .max_header_size = MAX_SMB2_HDR_SIZE,
5598 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5599 .lock_cmd = SMB2_LOCK,
5600 .cap_unix = 0,
5601 .cap_nt_find = SMB2_NT_FIND,
5602 .cap_large_files = SMB2_LARGE_FILES,
5603 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5604 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5605 .create_lease_size = sizeof(struct create_lease_v2),
5606 };
5607
5608 struct smb_version_values smbdefault_values = {
5609 .version_string = SMBDEFAULT_VERSION_STRING,
5610 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5611 .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,
5612 .large_lock_type = 0,
5613 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5614 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5615 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5616 .header_size = sizeof(struct smb2_sync_hdr),
5617 .header_preamble_size = 0,
5618 .max_header_size = MAX_SMB2_HDR_SIZE,
5619 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5620 .lock_cmd = SMB2_LOCK,
5621 .cap_unix = 0,
5622 .cap_nt_find = SMB2_NT_FIND,
5623 .cap_large_files = SMB2_LARGE_FILES,
5624 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5625 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5626 .create_lease_size = sizeof(struct create_lease_v2),
5627 };
5628
5629 struct smb_version_values smb30_values = {
5630 .version_string = SMB30_VERSION_STRING,
5631 .protocol_id = SMB30_PROT_ID,
5632 .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,
5633 .large_lock_type = 0,
5634 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5635 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5636 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5637 .header_size = sizeof(struct smb2_sync_hdr),
5638 .header_preamble_size = 0,
5639 .max_header_size = MAX_SMB2_HDR_SIZE,
5640 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5641 .lock_cmd = SMB2_LOCK,
5642 .cap_unix = 0,
5643 .cap_nt_find = SMB2_NT_FIND,
5644 .cap_large_files = SMB2_LARGE_FILES,
5645 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5646 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5647 .create_lease_size = sizeof(struct create_lease_v2),
5648 };
5649
5650 struct smb_version_values smb302_values = {
5651 .version_string = SMB302_VERSION_STRING,
5652 .protocol_id = SMB302_PROT_ID,
5653 .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,
5654 .large_lock_type = 0,
5655 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5656 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5657 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5658 .header_size = sizeof(struct smb2_sync_hdr),
5659 .header_preamble_size = 0,
5660 .max_header_size = MAX_SMB2_HDR_SIZE,
5661 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5662 .lock_cmd = SMB2_LOCK,
5663 .cap_unix = 0,
5664 .cap_nt_find = SMB2_NT_FIND,
5665 .cap_large_files = SMB2_LARGE_FILES,
5666 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5667 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5668 .create_lease_size = sizeof(struct create_lease_v2),
5669 };
5670
5671 struct smb_version_values smb311_values = {
5672 .version_string = SMB311_VERSION_STRING,
5673 .protocol_id = SMB311_PROT_ID,
5674 .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,
5675 .large_lock_type = 0,
5676 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
5677 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
5678 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5679 .header_size = sizeof(struct smb2_sync_hdr),
5680 .header_preamble_size = 0,
5681 .max_header_size = MAX_SMB2_HDR_SIZE,
5682 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
5683 .lock_cmd = SMB2_LOCK,
5684 .cap_unix = 0,
5685 .cap_nt_find = SMB2_NT_FIND,
5686 .cap_large_files = SMB2_LARGE_FILES,
5687 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5688 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5689 .create_lease_size = sizeof(struct create_lease_v2),
5690 };
5691