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 <uapi/linux/magic.h>
17 #include "cifsfs.h"
18 #include "cifsglob.h"
19 #include "smb2pdu.h"
20 #include "smb2proto.h"
21 #include "cifsproto.h"
22 #include "cifs_debug.h"
23 #include "cifs_unicode.h"
24 #include "smb2status.h"
25 #include "smb2glob.h"
26 #include "cifs_ioctl.h"
27 #include "smbdirect.h"
28 #include "fscache.h"
29 #include "fs_context.h"
30 #include "cached_dir.h"
31
32 /* Change credits for different ops and return the total number of credits */
33 static int
change_conf(struct TCP_Server_Info * server)34 change_conf(struct TCP_Server_Info *server)
35 {
36 server->credits += server->echo_credits + server->oplock_credits;
37 if (server->credits > server->max_credits)
38 server->credits = server->max_credits;
39 server->oplock_credits = server->echo_credits = 0;
40 switch (server->credits) {
41 case 0:
42 return 0;
43 case 1:
44 server->echoes = false;
45 server->oplocks = false;
46 break;
47 case 2:
48 server->echoes = true;
49 server->oplocks = false;
50 server->echo_credits = 1;
51 break;
52 default:
53 server->echoes = true;
54 if (enable_oplocks) {
55 server->oplocks = true;
56 server->oplock_credits = 1;
57 } else
58 server->oplocks = false;
59
60 server->echo_credits = 1;
61 }
62 server->credits -= server->echo_credits + server->oplock_credits;
63 return server->credits + server->echo_credits + server->oplock_credits;
64 }
65
66 static void
smb2_add_credits(struct TCP_Server_Info * server,const struct cifs_credits * credits,const int optype)67 smb2_add_credits(struct TCP_Server_Info *server,
68 const struct cifs_credits *credits, const int optype)
69 {
70 int *val, rc = -1;
71 int scredits, in_flight;
72 unsigned int add = credits->value;
73 unsigned int instance = credits->instance;
74 bool reconnect_detected = false;
75 bool reconnect_with_invalid_credits = false;
76
77 spin_lock(&server->req_lock);
78 val = server->ops->get_credits_field(server, optype);
79
80 /* eg found case where write overlapping reconnect messed up credits */
81 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
82 reconnect_with_invalid_credits = true;
83
84 if ((instance == 0) || (instance == server->reconnect_instance))
85 *val += add;
86 else
87 reconnect_detected = true;
88
89 if (*val > 65000) {
90 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
91 pr_warn_once("server overflowed SMB3 credits\n");
92 trace_smb3_overflow_credits(server->CurrentMid,
93 server->conn_id, server->hostname, *val,
94 add, server->in_flight);
95 }
96 WARN_ON_ONCE(server->in_flight == 0);
97 server->in_flight--;
98 if (server->in_flight == 0 &&
99 ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) &&
100 ((optype & CIFS_OP_MASK) != CIFS_SESS_OP))
101 rc = change_conf(server);
102 /*
103 * Sometimes server returns 0 credits on oplock break ack - we need to
104 * rebalance credits in this case.
105 */
106 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
107 server->oplocks) {
108 if (server->credits > 1) {
109 server->credits--;
110 server->oplock_credits++;
111 }
112 } else if ((server->in_flight > 0) && (server->oplock_credits > 3) &&
113 ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP))
114 /* if now have too many oplock credits, rebalance so don't starve normal ops */
115 change_conf(server);
116
117 scredits = *val;
118 in_flight = server->in_flight;
119 spin_unlock(&server->req_lock);
120 wake_up(&server->request_q);
121
122 if (reconnect_detected) {
123 trace_smb3_reconnect_detected(server->CurrentMid,
124 server->conn_id, server->hostname, scredits, add, in_flight);
125
126 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
127 add, instance);
128 }
129
130 if (reconnect_with_invalid_credits) {
131 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
132 server->conn_id, server->hostname, scredits, add, in_flight);
133 cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n",
134 optype, scredits, add);
135 }
136
137 spin_lock(&server->srv_lock);
138 if (server->tcpStatus == CifsNeedReconnect
139 || server->tcpStatus == CifsExiting) {
140 spin_unlock(&server->srv_lock);
141 return;
142 }
143 spin_unlock(&server->srv_lock);
144
145 switch (rc) {
146 case -1:
147 /* change_conf hasn't been executed */
148 break;
149 case 0:
150 cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
151 break;
152 case 1:
153 cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
154 break;
155 case 2:
156 cifs_dbg(FYI, "disabling oplocks\n");
157 break;
158 default:
159 /* change_conf rebalanced credits for different types */
160 break;
161 }
162
163 trace_smb3_add_credits(server->CurrentMid,
164 server->conn_id, server->hostname, scredits, add, in_flight);
165 cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits);
166 }
167
168 static void
smb2_set_credits(struct TCP_Server_Info * server,const int val)169 smb2_set_credits(struct TCP_Server_Info *server, const int val)
170 {
171 int scredits, in_flight;
172
173 spin_lock(&server->req_lock);
174 server->credits = val;
175 if (val == 1) {
176 server->reconnect_instance++;
177 /*
178 * ChannelSequence updated for all channels in primary channel so that consistent
179 * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1
180 */
181 if (SERVER_IS_CHAN(server))
182 server->primary_server->channel_sequence_num++;
183 else
184 server->channel_sequence_num++;
185 }
186 scredits = server->credits;
187 in_flight = server->in_flight;
188 spin_unlock(&server->req_lock);
189
190 trace_smb3_set_credits(server->CurrentMid,
191 server->conn_id, server->hostname, scredits, val, in_flight);
192 cifs_dbg(FYI, "%s: set %u credits\n", __func__, val);
193
194 /* don't log while holding the lock */
195 if (val == 1)
196 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
197 }
198
199 static int *
smb2_get_credits_field(struct TCP_Server_Info * server,const int optype)200 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
201 {
202 switch (optype) {
203 case CIFS_ECHO_OP:
204 return &server->echo_credits;
205 case CIFS_OBREAK_OP:
206 return &server->oplock_credits;
207 default:
208 return &server->credits;
209 }
210 }
211
212 static unsigned int
smb2_get_credits(struct mid_q_entry * mid)213 smb2_get_credits(struct mid_q_entry *mid)
214 {
215 return mid->credits_received;
216 }
217
218 static int
smb2_wait_mtu_credits(struct TCP_Server_Info * server,unsigned int size,unsigned int * num,struct cifs_credits * credits)219 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
220 unsigned int *num, struct cifs_credits *credits)
221 {
222 int rc = 0;
223 unsigned int scredits, in_flight;
224
225 spin_lock(&server->req_lock);
226 while (1) {
227 spin_unlock(&server->req_lock);
228
229 spin_lock(&server->srv_lock);
230 if (server->tcpStatus == CifsExiting) {
231 spin_unlock(&server->srv_lock);
232 return -ENOENT;
233 }
234 spin_unlock(&server->srv_lock);
235
236 spin_lock(&server->req_lock);
237 if (server->credits <= 0) {
238 spin_unlock(&server->req_lock);
239 cifs_num_waiters_inc(server);
240 rc = wait_event_killable(server->request_q,
241 has_credits(server, &server->credits, 1));
242 cifs_num_waiters_dec(server);
243 if (rc)
244 return rc;
245 spin_lock(&server->req_lock);
246 } else {
247 scredits = server->credits;
248 /* can deadlock with reopen */
249 if (scredits <= 8) {
250 *num = SMB2_MAX_BUFFER_SIZE;
251 credits->value = 0;
252 credits->instance = 0;
253 break;
254 }
255
256 /* leave some credits for reopen and other ops */
257 scredits -= 8;
258 *num = min_t(unsigned int, size,
259 scredits * SMB2_MAX_BUFFER_SIZE);
260
261 credits->value =
262 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
263 credits->instance = server->reconnect_instance;
264 server->credits -= credits->value;
265 server->in_flight++;
266 if (server->in_flight > server->max_in_flight)
267 server->max_in_flight = server->in_flight;
268 break;
269 }
270 }
271 scredits = server->credits;
272 in_flight = server->in_flight;
273 spin_unlock(&server->req_lock);
274
275 trace_smb3_wait_credits(server->CurrentMid,
276 server->conn_id, server->hostname, scredits, -(credits->value), in_flight);
277 cifs_dbg(FYI, "%s: removed %u credits total=%d\n",
278 __func__, credits->value, scredits);
279
280 return rc;
281 }
282
283 static int
smb2_adjust_credits(struct TCP_Server_Info * server,struct cifs_credits * credits,const unsigned int payload_size)284 smb2_adjust_credits(struct TCP_Server_Info *server,
285 struct cifs_credits *credits,
286 const unsigned int payload_size)
287 {
288 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
289 int scredits, in_flight;
290
291 if (!credits->value || credits->value == new_val)
292 return 0;
293
294 if (credits->value < new_val) {
295 trace_smb3_too_many_credits(server->CurrentMid,
296 server->conn_id, server->hostname, 0, credits->value - new_val, 0);
297 cifs_server_dbg(VFS, "request has less credits (%d) than required (%d)",
298 credits->value, new_val);
299
300 return -EOPNOTSUPP;
301 }
302
303 spin_lock(&server->req_lock);
304
305 if (server->reconnect_instance != credits->instance) {
306 scredits = server->credits;
307 in_flight = server->in_flight;
308 spin_unlock(&server->req_lock);
309
310 trace_smb3_reconnect_detected(server->CurrentMid,
311 server->conn_id, server->hostname, scredits,
312 credits->value - new_val, in_flight);
313 cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
314 credits->value - new_val);
315 return -EAGAIN;
316 }
317
318 server->credits += credits->value - new_val;
319 scredits = server->credits;
320 in_flight = server->in_flight;
321 spin_unlock(&server->req_lock);
322 wake_up(&server->request_q);
323
324 trace_smb3_adj_credits(server->CurrentMid,
325 server->conn_id, server->hostname, scredits,
326 credits->value - new_val, in_flight);
327 cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n",
328 __func__, credits->value - new_val, scredits);
329
330 credits->value = new_val;
331
332 return 0;
333 }
334
335 static __u64
smb2_get_next_mid(struct TCP_Server_Info * server)336 smb2_get_next_mid(struct TCP_Server_Info *server)
337 {
338 __u64 mid;
339 /* for SMB2 we need the current value */
340 spin_lock(&server->mid_lock);
341 mid = server->CurrentMid++;
342 spin_unlock(&server->mid_lock);
343 return mid;
344 }
345
346 static void
smb2_revert_current_mid(struct TCP_Server_Info * server,const unsigned int val)347 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
348 {
349 spin_lock(&server->mid_lock);
350 if (server->CurrentMid >= val)
351 server->CurrentMid -= val;
352 spin_unlock(&server->mid_lock);
353 }
354
355 static struct mid_q_entry *
__smb2_find_mid(struct TCP_Server_Info * server,char * buf,bool dequeue)356 __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue)
357 {
358 struct mid_q_entry *mid;
359 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
360 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
361
362 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
363 cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
364 return NULL;
365 }
366
367 spin_lock(&server->mid_lock);
368 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
369 if ((mid->mid == wire_mid) &&
370 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
371 (mid->command == shdr->Command)) {
372 kref_get(&mid->refcount);
373 if (dequeue) {
374 list_del_init(&mid->qhead);
375 mid->mid_flags |= MID_DELETED;
376 }
377 spin_unlock(&server->mid_lock);
378 return mid;
379 }
380 }
381 spin_unlock(&server->mid_lock);
382 return NULL;
383 }
384
385 static struct mid_q_entry *
smb2_find_mid(struct TCP_Server_Info * server,char * buf)386 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
387 {
388 return __smb2_find_mid(server, buf, false);
389 }
390
391 static struct mid_q_entry *
smb2_find_dequeue_mid(struct TCP_Server_Info * server,char * buf)392 smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf)
393 {
394 return __smb2_find_mid(server, buf, true);
395 }
396
397 static void
smb2_dump_detail(void * buf,struct TCP_Server_Info * server)398 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
399 {
400 #ifdef CONFIG_CIFS_DEBUG2
401 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
402
403 cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
404 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
405 shdr->Id.SyncId.ProcessId);
406 if (!server->ops->check_message(buf, server->total_read, server)) {
407 cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
408 server->ops->calc_smb_size(buf));
409 }
410 #endif
411 }
412
413 static bool
smb2_need_neg(struct TCP_Server_Info * server)414 smb2_need_neg(struct TCP_Server_Info *server)
415 {
416 return server->max_read == 0;
417 }
418
419 static int
smb2_negotiate(const unsigned int xid,struct cifs_ses * ses,struct TCP_Server_Info * server)420 smb2_negotiate(const unsigned int xid,
421 struct cifs_ses *ses,
422 struct TCP_Server_Info *server)
423 {
424 int rc;
425
426 spin_lock(&server->mid_lock);
427 server->CurrentMid = 0;
428 spin_unlock(&server->mid_lock);
429 rc = SMB2_negotiate(xid, ses, server);
430 /* BB we probably don't need to retry with modern servers */
431 if (rc == -EAGAIN)
432 rc = -EHOSTDOWN;
433 return rc;
434 }
435
436 static unsigned int
smb2_negotiate_wsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)437 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
438 {
439 struct TCP_Server_Info *server = tcon->ses->server;
440 unsigned int wsize;
441
442 /* start with specified wsize, or default */
443 wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE;
444 wsize = min_t(unsigned int, wsize, server->max_write);
445 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
446 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
447
448 return wsize;
449 }
450
451 static unsigned int
smb3_negotiate_wsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)452 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
453 {
454 struct TCP_Server_Info *server = tcon->ses->server;
455 unsigned int wsize;
456
457 /* start with specified wsize, or default */
458 wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE;
459 wsize = min_t(unsigned int, wsize, server->max_write);
460 #ifdef CONFIG_CIFS_SMB_DIRECT
461 if (server->rdma) {
462 if (server->sign)
463 /*
464 * Account for SMB2 data transfer packet header and
465 * possible encryption header
466 */
467 wsize = min_t(unsigned int,
468 wsize,
469 server->smbd_conn->max_fragmented_send_size -
470 SMB2_READWRITE_PDU_HEADER_SIZE -
471 sizeof(struct smb2_transform_hdr));
472 else
473 wsize = min_t(unsigned int,
474 wsize, server->smbd_conn->max_readwrite_size);
475 }
476 #endif
477 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
478 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
479
480 return wsize;
481 }
482
483 static unsigned int
smb2_negotiate_rsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)484 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
485 {
486 struct TCP_Server_Info *server = tcon->ses->server;
487 unsigned int rsize;
488
489 /* start with specified rsize, or default */
490 rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE;
491 rsize = min_t(unsigned int, rsize, server->max_read);
492
493 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
494 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
495
496 return rsize;
497 }
498
499 static unsigned int
smb3_negotiate_rsize(struct cifs_tcon * tcon,struct smb3_fs_context * ctx)500 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx)
501 {
502 struct TCP_Server_Info *server = tcon->ses->server;
503 unsigned int rsize;
504
505 /* start with specified rsize, or default */
506 rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE;
507 rsize = min_t(unsigned int, rsize, server->max_read);
508 #ifdef CONFIG_CIFS_SMB_DIRECT
509 if (server->rdma) {
510 if (server->sign)
511 /*
512 * Account for SMB2 data transfer packet header and
513 * possible encryption header
514 */
515 rsize = min_t(unsigned int,
516 rsize,
517 server->smbd_conn->max_fragmented_recv_size -
518 SMB2_READWRITE_PDU_HEADER_SIZE -
519 sizeof(struct smb2_transform_hdr));
520 else
521 rsize = min_t(unsigned int,
522 rsize, server->smbd_conn->max_readwrite_size);
523 }
524 #endif
525
526 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
527 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
528
529 return rsize;
530 }
531
532 /*
533 * compare two interfaces a and b
534 * return 0 if everything matches.
535 * return 1 if a is rdma capable, or rss capable, or has higher link speed
536 * return -1 otherwise.
537 */
538 static int
iface_cmp(struct cifs_server_iface * a,struct cifs_server_iface * b)539 iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b)
540 {
541 int cmp_ret = 0;
542
543 WARN_ON(!a || !b);
544 if (a->rdma_capable == b->rdma_capable) {
545 if (a->rss_capable == b->rss_capable) {
546 if (a->speed == b->speed) {
547 cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr,
548 (struct sockaddr *) &b->sockaddr);
549 if (!cmp_ret)
550 return 0;
551 else if (cmp_ret > 0)
552 return 1;
553 else
554 return -1;
555 } else if (a->speed > b->speed)
556 return 1;
557 else
558 return -1;
559 } else if (a->rss_capable > b->rss_capable)
560 return 1;
561 else
562 return -1;
563 } else if (a->rdma_capable > b->rdma_capable)
564 return 1;
565 else
566 return -1;
567 }
568
569 static int
parse_server_interfaces(struct network_interface_info_ioctl_rsp * buf,size_t buf_len,struct cifs_ses * ses,bool in_mount)570 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
571 size_t buf_len, struct cifs_ses *ses, bool in_mount)
572 {
573 struct network_interface_info_ioctl_rsp *p;
574 struct sockaddr_in *addr4;
575 struct sockaddr_in6 *addr6;
576 struct iface_info_ipv4 *p4;
577 struct iface_info_ipv6 *p6;
578 struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL;
579 struct cifs_server_iface tmp_iface;
580 ssize_t bytes_left;
581 size_t next = 0;
582 int nb_iface = 0;
583 int rc = 0, ret = 0;
584
585 bytes_left = buf_len;
586 p = buf;
587
588 spin_lock(&ses->iface_lock);
589 /* do not query too frequently, this time with lock held */
590 if (ses->iface_last_update &&
591 time_before(jiffies, ses->iface_last_update +
592 (SMB_INTERFACE_POLL_INTERVAL * HZ))) {
593 spin_unlock(&ses->iface_lock);
594 return 0;
595 }
596
597 /*
598 * Go through iface_list and mark them as inactive
599 */
600 list_for_each_entry_safe(iface, niface, &ses->iface_list,
601 iface_head)
602 iface->is_active = 0;
603
604 spin_unlock(&ses->iface_lock);
605
606 /*
607 * Samba server e.g. can return an empty interface list in some cases,
608 * which would only be a problem if we were requesting multichannel
609 */
610 if (bytes_left == 0) {
611 /* avoid spamming logs every 10 minutes, so log only in mount */
612 if ((ses->chan_max > 1) && in_mount)
613 cifs_dbg(VFS,
614 "multichannel not available\n"
615 "Empty network interface list returned by server %s\n",
616 ses->server->hostname);
617 rc = -EOPNOTSUPP;
618 ses->iface_last_update = jiffies;
619 goto out;
620 }
621
622 while (bytes_left >= (ssize_t)sizeof(*p)) {
623 memset(&tmp_iface, 0, sizeof(tmp_iface));
624 tmp_iface.speed = le64_to_cpu(p->LinkSpeed);
625 tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0;
626 tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0;
627
628 switch (p->Family) {
629 /*
630 * The kernel and wire socket structures have the same
631 * layout and use network byte order but make the
632 * conversion explicit in case either one changes.
633 */
634 case INTERNETWORK:
635 addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr;
636 p4 = (struct iface_info_ipv4 *)p->Buffer;
637 addr4->sin_family = AF_INET;
638 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
639
640 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
641 addr4->sin_port = cpu_to_be16(CIFS_PORT);
642
643 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
644 &addr4->sin_addr);
645 break;
646 case INTERNETWORKV6:
647 addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr;
648 p6 = (struct iface_info_ipv6 *)p->Buffer;
649 addr6->sin6_family = AF_INET6;
650 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
651
652 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
653 addr6->sin6_flowinfo = 0;
654 addr6->sin6_scope_id = 0;
655 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
656
657 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
658 &addr6->sin6_addr);
659 break;
660 default:
661 cifs_dbg(VFS,
662 "%s: skipping unsupported socket family\n",
663 __func__);
664 goto next_iface;
665 }
666
667 /*
668 * The iface_list is assumed to be sorted by speed.
669 * Check if the new interface exists in that list.
670 * NEVER change iface. it could be in use.
671 * Add a new one instead
672 */
673 spin_lock(&ses->iface_lock);
674 list_for_each_entry_safe(iface, niface, &ses->iface_list,
675 iface_head) {
676 ret = iface_cmp(iface, &tmp_iface);
677 if (!ret) {
678 iface->is_active = 1;
679 spin_unlock(&ses->iface_lock);
680 goto next_iface;
681 } else if (ret < 0) {
682 /* all remaining ifaces are slower */
683 kref_get(&iface->refcount);
684 break;
685 }
686 }
687 spin_unlock(&ses->iface_lock);
688
689 /* no match. insert the entry in the list */
690 info = kmalloc(sizeof(struct cifs_server_iface),
691 GFP_KERNEL);
692 if (!info) {
693 rc = -ENOMEM;
694 goto out;
695 }
696 memcpy(info, &tmp_iface, sizeof(tmp_iface));
697
698 /* add this new entry to the list */
699 kref_init(&info->refcount);
700 info->is_active = 1;
701
702 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count);
703 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
704 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
705 le32_to_cpu(p->Capability));
706
707 spin_lock(&ses->iface_lock);
708 if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) {
709 list_add_tail(&info->iface_head, &iface->iface_head);
710 kref_put(&iface->refcount, release_iface);
711 } else
712 list_add_tail(&info->iface_head, &ses->iface_list);
713
714 ses->iface_count++;
715 spin_unlock(&ses->iface_lock);
716 next_iface:
717 nb_iface++;
718 next = le32_to_cpu(p->Next);
719 if (!next) {
720 bytes_left -= sizeof(*p);
721 break;
722 }
723 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
724 bytes_left -= next;
725 }
726
727 if (!nb_iface) {
728 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
729 rc = -EINVAL;
730 goto out;
731 }
732
733 /* Azure rounds the buffer size up 8, to a 16 byte boundary */
734 if ((bytes_left > 8) || p->Next)
735 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
736
737 ses->iface_last_update = jiffies;
738
739 out:
740 /*
741 * Go through the list again and put the inactive entries
742 */
743 spin_lock(&ses->iface_lock);
744 list_for_each_entry_safe(iface, niface, &ses->iface_list,
745 iface_head) {
746 if (!iface->is_active) {
747 list_del(&iface->iface_head);
748 kref_put(&iface->refcount, release_iface);
749 ses->iface_count--;
750 }
751 }
752 spin_unlock(&ses->iface_lock);
753
754 return rc;
755 }
756
757 int
SMB3_request_interfaces(const unsigned int xid,struct cifs_tcon * tcon,bool in_mount)758 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount)
759 {
760 int rc;
761 unsigned int ret_data_len = 0;
762 struct network_interface_info_ioctl_rsp *out_buf = NULL;
763 struct cifs_ses *ses = tcon->ses;
764 struct TCP_Server_Info *pserver;
765
766 /* do not query too frequently */
767 if (ses->iface_last_update &&
768 time_before(jiffies, ses->iface_last_update +
769 (SMB_INTERFACE_POLL_INTERVAL * HZ)))
770 return 0;
771
772 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
773 FSCTL_QUERY_NETWORK_INTERFACE_INFO,
774 NULL /* no data input */, 0 /* no data input */,
775 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
776 if (rc == -EOPNOTSUPP) {
777 cifs_dbg(FYI,
778 "server does not support query network interfaces\n");
779 ret_data_len = 0;
780 } else if (rc != 0) {
781 cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
782 goto out;
783 }
784
785 rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount);
786 if (rc)
787 goto out;
788
789 /* check if iface is still active */
790 spin_lock(&ses->chan_lock);
791 pserver = ses->chans[0].server;
792 if (pserver && !cifs_chan_is_iface_active(ses, pserver)) {
793 spin_unlock(&ses->chan_lock);
794 cifs_chan_update_iface(ses, pserver);
795 spin_lock(&ses->chan_lock);
796 }
797 spin_unlock(&ses->chan_lock);
798
799 out:
800 kfree(out_buf);
801 return rc;
802 }
803
804 static void
smb3_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)805 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
806 struct cifs_sb_info *cifs_sb)
807 {
808 int rc;
809 __le16 srch_path = 0; /* Null - open root of share */
810 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
811 struct cifs_open_parms oparms;
812 struct cifs_fid fid;
813 struct cached_fid *cfid = NULL;
814
815 oparms = (struct cifs_open_parms) {
816 .tcon = tcon,
817 .path = "",
818 .desired_access = FILE_READ_ATTRIBUTES,
819 .disposition = FILE_OPEN,
820 .create_options = cifs_create_options(cifs_sb, 0),
821 .fid = &fid,
822 };
823
824 rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid);
825 if (rc == 0)
826 memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid));
827 else
828 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
829 NULL, NULL);
830 if (rc)
831 return;
832
833 SMB3_request_interfaces(xid, tcon, true /* called during mount */);
834
835 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
836 FS_ATTRIBUTE_INFORMATION);
837 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
838 FS_DEVICE_INFORMATION);
839 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
840 FS_VOLUME_INFORMATION);
841 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
842 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
843 if (cfid == NULL)
844 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
845 else
846 close_cached_dir(cfid);
847 }
848
849 static void
smb2_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb)850 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon,
851 struct cifs_sb_info *cifs_sb)
852 {
853 int rc;
854 __le16 srch_path = 0; /* Null - open root of share */
855 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
856 struct cifs_open_parms oparms;
857 struct cifs_fid fid;
858
859 oparms = (struct cifs_open_parms) {
860 .tcon = tcon,
861 .path = "",
862 .desired_access = FILE_READ_ATTRIBUTES,
863 .disposition = FILE_OPEN,
864 .create_options = cifs_create_options(cifs_sb, 0),
865 .fid = &fid,
866 };
867
868 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
869 NULL, NULL);
870 if (rc)
871 return;
872
873 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
874 FS_ATTRIBUTE_INFORMATION);
875 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
876 FS_DEVICE_INFORMATION);
877 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
878 }
879
880 static int
smb2_is_path_accessible(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path)881 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
882 struct cifs_sb_info *cifs_sb, const char *full_path)
883 {
884 __le16 *utf16_path;
885 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
886 int err_buftype = CIFS_NO_BUFFER;
887 struct cifs_open_parms oparms;
888 struct kvec err_iov = {};
889 struct cifs_fid fid;
890 struct cached_fid *cfid;
891 bool islink;
892 int rc, rc2;
893
894 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid);
895 if (!rc) {
896 if (cfid->has_lease) {
897 close_cached_dir(cfid);
898 return 0;
899 }
900 close_cached_dir(cfid);
901 }
902
903 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
904 if (!utf16_path)
905 return -ENOMEM;
906
907 oparms = (struct cifs_open_parms) {
908 .tcon = tcon,
909 .path = full_path,
910 .desired_access = FILE_READ_ATTRIBUTES,
911 .disposition = FILE_OPEN,
912 .create_options = cifs_create_options(cifs_sb, 0),
913 .fid = &fid,
914 };
915
916 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
917 &err_iov, &err_buftype);
918 if (rc) {
919 struct smb2_hdr *hdr = err_iov.iov_base;
920
921 if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER))
922 goto out;
923
924 if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) {
925 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb,
926 full_path, &islink);
927 if (rc2) {
928 rc = rc2;
929 goto out;
930 }
931 if (islink)
932 rc = -EREMOTE;
933 }
934 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
935 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
936 rc = -EOPNOTSUPP;
937 goto out;
938 }
939
940 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
941
942 out:
943 free_rsp_buf(err_buftype, err_iov.iov_base);
944 kfree(utf16_path);
945 return rc;
946 }
947
smb2_get_srv_inum(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,u64 * uniqueid,struct cifs_open_info_data * data)948 static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
949 struct cifs_sb_info *cifs_sb, const char *full_path,
950 u64 *uniqueid, struct cifs_open_info_data *data)
951 {
952 *uniqueid = le64_to_cpu(data->fi.IndexNumber);
953 return 0;
954 }
955
smb2_query_file_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct cifs_open_info_data * data)956 static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
957 struct cifsFileInfo *cfile, struct cifs_open_info_data *data)
958 {
959 struct cifs_fid *fid = &cfile->fid;
960
961 if (cfile->symlink_target) {
962 data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL);
963 if (!data->symlink_target)
964 return -ENOMEM;
965 }
966 return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi);
967 }
968
969 #ifdef CONFIG_CIFS_XATTR
970 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)971 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
972 struct smb2_file_full_ea_info *src, size_t src_size,
973 const unsigned char *ea_name)
974 {
975 int rc = 0;
976 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
977 char *name, *value;
978 size_t buf_size = dst_size;
979 size_t name_len, value_len, user_name_len;
980
981 while (src_size > 0) {
982 name_len = (size_t)src->ea_name_length;
983 value_len = (size_t)le16_to_cpu(src->ea_value_length);
984
985 if (name_len == 0)
986 break;
987
988 if (src_size < 8 + name_len + 1 + value_len) {
989 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
990 rc = -EIO;
991 goto out;
992 }
993
994 name = &src->ea_data[0];
995 value = &src->ea_data[src->ea_name_length + 1];
996
997 if (ea_name) {
998 if (ea_name_len == name_len &&
999 memcmp(ea_name, name, name_len) == 0) {
1000 rc = value_len;
1001 if (dst_size == 0)
1002 goto out;
1003 if (dst_size < value_len) {
1004 rc = -ERANGE;
1005 goto out;
1006 }
1007 memcpy(dst, value, value_len);
1008 goto out;
1009 }
1010 } else {
1011 /* 'user.' plus a terminating null */
1012 user_name_len = 5 + 1 + name_len;
1013
1014 if (buf_size == 0) {
1015 /* skip copy - calc size only */
1016 rc += user_name_len;
1017 } else if (dst_size >= user_name_len) {
1018 dst_size -= user_name_len;
1019 memcpy(dst, "user.", 5);
1020 dst += 5;
1021 memcpy(dst, src->ea_data, name_len);
1022 dst += name_len;
1023 *dst = 0;
1024 ++dst;
1025 rc += user_name_len;
1026 } else {
1027 /* stop before overrun buffer */
1028 rc = -ERANGE;
1029 break;
1030 }
1031 }
1032
1033 if (!src->next_entry_offset)
1034 break;
1035
1036 if (src_size < le32_to_cpu(src->next_entry_offset)) {
1037 /* stop before overrun buffer */
1038 rc = -ERANGE;
1039 break;
1040 }
1041 src_size -= le32_to_cpu(src->next_entry_offset);
1042 src = (void *)((char *)src +
1043 le32_to_cpu(src->next_entry_offset));
1044 }
1045
1046 /* didn't find the named attribute */
1047 if (ea_name)
1048 rc = -ENODATA;
1049
1050 out:
1051 return (ssize_t)rc;
1052 }
1053
1054 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)1055 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1056 const unsigned char *path, const unsigned char *ea_name,
1057 char *ea_data, size_t buf_size,
1058 struct cifs_sb_info *cifs_sb)
1059 {
1060 int rc;
1061 struct kvec rsp_iov = {NULL, 0};
1062 int buftype = CIFS_NO_BUFFER;
1063 struct smb2_query_info_rsp *rsp;
1064 struct smb2_file_full_ea_info *info = NULL;
1065
1066 rc = smb2_query_info_compound(xid, tcon, path,
1067 FILE_READ_EA,
1068 FILE_FULL_EA_INFORMATION,
1069 SMB2_O_INFO_FILE,
1070 CIFSMaxBufSize -
1071 MAX_SMB2_CREATE_RESPONSE_SIZE -
1072 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1073 &rsp_iov, &buftype, cifs_sb);
1074 if (rc) {
1075 /*
1076 * If ea_name is NULL (listxattr) and there are no EAs,
1077 * return 0 as it's not an error. Otherwise, the specified
1078 * ea_name was not found.
1079 */
1080 if (!ea_name && rc == -ENODATA)
1081 rc = 0;
1082 goto qeas_exit;
1083 }
1084
1085 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1086 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1087 le32_to_cpu(rsp->OutputBufferLength),
1088 &rsp_iov,
1089 sizeof(struct smb2_file_full_ea_info));
1090 if (rc)
1091 goto qeas_exit;
1092
1093 info = (struct smb2_file_full_ea_info *)(
1094 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1095 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1096 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1097
1098 qeas_exit:
1099 free_rsp_buf(buftype, rsp_iov.iov_base);
1100 return rc;
1101 }
1102
1103 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)1104 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1105 const char *path, const char *ea_name, const void *ea_value,
1106 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1107 struct cifs_sb_info *cifs_sb)
1108 {
1109 struct smb2_compound_vars *vars;
1110 struct cifs_ses *ses = tcon->ses;
1111 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1112 struct smb_rqst *rqst;
1113 struct kvec *rsp_iov;
1114 __le16 *utf16_path = NULL;
1115 int ea_name_len = strlen(ea_name);
1116 int flags = CIFS_CP_CREATE_CLOSE_OP;
1117 int len;
1118 int resp_buftype[3];
1119 struct cifs_open_parms oparms;
1120 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1121 struct cifs_fid fid;
1122 unsigned int size[1];
1123 void *data[1];
1124 struct smb2_file_full_ea_info *ea = NULL;
1125 struct smb2_query_info_rsp *rsp;
1126 int rc, used_len = 0;
1127
1128 if (smb3_encryption_required(tcon))
1129 flags |= CIFS_TRANSFORM_REQ;
1130
1131 if (ea_name_len > 255)
1132 return -EINVAL;
1133
1134 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1135 if (!utf16_path)
1136 return -ENOMEM;
1137
1138 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1139 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
1140 if (!vars) {
1141 rc = -ENOMEM;
1142 goto out_free_path;
1143 }
1144 rqst = vars->rqst;
1145 rsp_iov = vars->rsp_iov;
1146
1147 if (ses->server->ops->query_all_EAs) {
1148 if (!ea_value) {
1149 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1150 ea_name, NULL, 0,
1151 cifs_sb);
1152 if (rc == -ENODATA)
1153 goto sea_exit;
1154 } else {
1155 /* If we are adding a attribute we should first check
1156 * if there will be enough space available to store
1157 * the new EA. If not we should not add it since we
1158 * would not be able to even read the EAs back.
1159 */
1160 rc = smb2_query_info_compound(xid, tcon, path,
1161 FILE_READ_EA,
1162 FILE_FULL_EA_INFORMATION,
1163 SMB2_O_INFO_FILE,
1164 CIFSMaxBufSize -
1165 MAX_SMB2_CREATE_RESPONSE_SIZE -
1166 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1167 &rsp_iov[1], &resp_buftype[1], cifs_sb);
1168 if (rc == 0) {
1169 rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1170 used_len = le32_to_cpu(rsp->OutputBufferLength);
1171 }
1172 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1173 resp_buftype[1] = CIFS_NO_BUFFER;
1174 memset(&rsp_iov[1], 0, sizeof(rsp_iov[1]));
1175 rc = 0;
1176
1177 /* Use a fudge factor of 256 bytes in case we collide
1178 * with a different set_EAs command.
1179 */
1180 if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1181 MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 <
1182 used_len + ea_name_len + ea_value_len + 1) {
1183 rc = -ENOSPC;
1184 goto sea_exit;
1185 }
1186 }
1187 }
1188
1189 /* Open */
1190 rqst[0].rq_iov = vars->open_iov;
1191 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1192
1193 oparms = (struct cifs_open_parms) {
1194 .tcon = tcon,
1195 .path = path,
1196 .desired_access = FILE_WRITE_EA,
1197 .disposition = FILE_OPEN,
1198 .create_options = cifs_create_options(cifs_sb, 0),
1199 .fid = &fid,
1200 };
1201
1202 rc = SMB2_open_init(tcon, server,
1203 &rqst[0], &oplock, &oparms, utf16_path);
1204 if (rc)
1205 goto sea_exit;
1206 smb2_set_next_command(tcon, &rqst[0]);
1207
1208
1209 /* Set Info */
1210 rqst[1].rq_iov = vars->si_iov;
1211 rqst[1].rq_nvec = 1;
1212
1213 len = sizeof(*ea) + ea_name_len + ea_value_len + 1;
1214 ea = kzalloc(len, GFP_KERNEL);
1215 if (ea == NULL) {
1216 rc = -ENOMEM;
1217 goto sea_exit;
1218 }
1219
1220 ea->ea_name_length = ea_name_len;
1221 ea->ea_value_length = cpu_to_le16(ea_value_len);
1222 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1223 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1224
1225 size[0] = len;
1226 data[0] = ea;
1227
1228 rc = SMB2_set_info_init(tcon, server,
1229 &rqst[1], COMPOUND_FID,
1230 COMPOUND_FID, current->tgid,
1231 FILE_FULL_EA_INFORMATION,
1232 SMB2_O_INFO_FILE, 0, data, size);
1233 if (rc)
1234 goto sea_exit;
1235 smb2_set_next_command(tcon, &rqst[1]);
1236 smb2_set_related(&rqst[1]);
1237
1238 /* Close */
1239 rqst[2].rq_iov = &vars->close_iov;
1240 rqst[2].rq_nvec = 1;
1241 rc = SMB2_close_init(tcon, server,
1242 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1243 if (rc)
1244 goto sea_exit;
1245 smb2_set_related(&rqst[2]);
1246
1247 rc = compound_send_recv(xid, ses, server,
1248 flags, 3, rqst,
1249 resp_buftype, rsp_iov);
1250 /* no need to bump num_remote_opens because handle immediately closed */
1251
1252 sea_exit:
1253 kfree(ea);
1254 SMB2_open_free(&rqst[0]);
1255 SMB2_set_info_free(&rqst[1]);
1256 SMB2_close_free(&rqst[2]);
1257 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1258 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1259 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1260 kfree(vars);
1261 out_free_path:
1262 kfree(utf16_path);
1263 return rc;
1264 }
1265 #endif
1266
1267 static bool
smb2_can_echo(struct TCP_Server_Info * server)1268 smb2_can_echo(struct TCP_Server_Info *server)
1269 {
1270 return server->echoes;
1271 }
1272
1273 static void
smb2_clear_stats(struct cifs_tcon * tcon)1274 smb2_clear_stats(struct cifs_tcon *tcon)
1275 {
1276 int i;
1277
1278 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1279 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1280 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1281 }
1282 }
1283
1284 static void
smb2_dump_share_caps(struct seq_file * m,struct cifs_tcon * tcon)1285 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1286 {
1287 seq_puts(m, "\n\tShare Capabilities:");
1288 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1289 seq_puts(m, " DFS,");
1290 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1291 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1292 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1293 seq_puts(m, " SCALEOUT,");
1294 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1295 seq_puts(m, " CLUSTER,");
1296 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1297 seq_puts(m, " ASYMMETRIC,");
1298 if (tcon->capabilities == 0)
1299 seq_puts(m, " None");
1300 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1301 seq_puts(m, " Aligned,");
1302 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1303 seq_puts(m, " Partition Aligned,");
1304 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1305 seq_puts(m, " SSD,");
1306 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1307 seq_puts(m, " TRIM-support,");
1308
1309 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1310 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1311 if (tcon->perf_sector_size)
1312 seq_printf(m, "\tOptimal sector size: 0x%x",
1313 tcon->perf_sector_size);
1314 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1315 }
1316
1317 static void
smb2_print_stats(struct seq_file * m,struct cifs_tcon * tcon)1318 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1319 {
1320 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1321 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1322
1323 /*
1324 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1325 * totals (requests sent) since those SMBs are per-session not per tcon
1326 */
1327 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1328 (long long)(tcon->bytes_read),
1329 (long long)(tcon->bytes_written));
1330 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1331 atomic_read(&tcon->num_local_opens),
1332 atomic_read(&tcon->num_remote_opens));
1333 seq_printf(m, "\nTreeConnects: %d total %d failed",
1334 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1335 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1336 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1337 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1338 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1339 seq_printf(m, "\nCreates: %d total %d failed",
1340 atomic_read(&sent[SMB2_CREATE_HE]),
1341 atomic_read(&failed[SMB2_CREATE_HE]));
1342 seq_printf(m, "\nCloses: %d total %d failed",
1343 atomic_read(&sent[SMB2_CLOSE_HE]),
1344 atomic_read(&failed[SMB2_CLOSE_HE]));
1345 seq_printf(m, "\nFlushes: %d total %d failed",
1346 atomic_read(&sent[SMB2_FLUSH_HE]),
1347 atomic_read(&failed[SMB2_FLUSH_HE]));
1348 seq_printf(m, "\nReads: %d total %d failed",
1349 atomic_read(&sent[SMB2_READ_HE]),
1350 atomic_read(&failed[SMB2_READ_HE]));
1351 seq_printf(m, "\nWrites: %d total %d failed",
1352 atomic_read(&sent[SMB2_WRITE_HE]),
1353 atomic_read(&failed[SMB2_WRITE_HE]));
1354 seq_printf(m, "\nLocks: %d total %d failed",
1355 atomic_read(&sent[SMB2_LOCK_HE]),
1356 atomic_read(&failed[SMB2_LOCK_HE]));
1357 seq_printf(m, "\nIOCTLs: %d total %d failed",
1358 atomic_read(&sent[SMB2_IOCTL_HE]),
1359 atomic_read(&failed[SMB2_IOCTL_HE]));
1360 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1361 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1362 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1363 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1364 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1365 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1366 seq_printf(m, "\nQueryInfos: %d total %d failed",
1367 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1368 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1369 seq_printf(m, "\nSetInfos: %d total %d failed",
1370 atomic_read(&sent[SMB2_SET_INFO_HE]),
1371 atomic_read(&failed[SMB2_SET_INFO_HE]));
1372 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1373 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1374 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1375 }
1376
1377 static void
smb2_set_fid(struct cifsFileInfo * cfile,struct cifs_fid * fid,__u32 oplock)1378 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1379 {
1380 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1381 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1382
1383 cfile->fid.persistent_fid = fid->persistent_fid;
1384 cfile->fid.volatile_fid = fid->volatile_fid;
1385 cfile->fid.access = fid->access;
1386 #ifdef CONFIG_CIFS_DEBUG2
1387 cfile->fid.mid = fid->mid;
1388 #endif /* CIFS_DEBUG2 */
1389 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1390 &fid->purge_cache);
1391 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1392 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1393 }
1394
1395 static void
smb2_close_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1396 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1397 struct cifs_fid *fid)
1398 {
1399 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1400 }
1401
1402 static void
smb2_close_getattr(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)1403 smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon,
1404 struct cifsFileInfo *cfile)
1405 {
1406 struct smb2_file_network_open_info file_inf;
1407 struct inode *inode;
1408 int rc;
1409
1410 rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid,
1411 cfile->fid.volatile_fid, &file_inf);
1412 if (rc)
1413 return;
1414
1415 inode = d_inode(cfile->dentry);
1416
1417 spin_lock(&inode->i_lock);
1418 CIFS_I(inode)->time = jiffies;
1419
1420 /* Creation time should not need to be updated on close */
1421 if (file_inf.LastWriteTime)
1422 inode_set_mtime_to_ts(inode,
1423 cifs_NTtimeToUnix(file_inf.LastWriteTime));
1424 if (file_inf.ChangeTime)
1425 inode_set_ctime_to_ts(inode,
1426 cifs_NTtimeToUnix(file_inf.ChangeTime));
1427 if (file_inf.LastAccessTime)
1428 inode_set_atime_to_ts(inode,
1429 cifs_NTtimeToUnix(file_inf.LastAccessTime));
1430
1431 /*
1432 * i_blocks is not related to (i_size / i_blksize),
1433 * but instead 512 byte (2**9) size is required for
1434 * calculating num blocks.
1435 */
1436 if (le64_to_cpu(file_inf.AllocationSize) > 4096)
1437 inode->i_blocks =
1438 (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9;
1439
1440 /* End of file and Attributes should not have to be updated on close */
1441 spin_unlock(&inode->i_lock);
1442 }
1443
1444 static int
SMB2_request_res_key(const unsigned int xid,struct cifs_tcon * tcon,u64 persistent_fid,u64 volatile_fid,struct copychunk_ioctl * pcchunk)1445 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1446 u64 persistent_fid, u64 volatile_fid,
1447 struct copychunk_ioctl *pcchunk)
1448 {
1449 int rc;
1450 unsigned int ret_data_len;
1451 struct resume_key_req *res_key;
1452
1453 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1454 FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */,
1455 CIFSMaxBufSize, (char **)&res_key, &ret_data_len);
1456
1457 if (rc == -EOPNOTSUPP) {
1458 pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name);
1459 goto req_res_key_exit;
1460 } else if (rc) {
1461 cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1462 goto req_res_key_exit;
1463 }
1464 if (ret_data_len < sizeof(struct resume_key_req)) {
1465 cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
1466 rc = -EINVAL;
1467 goto req_res_key_exit;
1468 }
1469 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1470
1471 req_res_key_exit:
1472 kfree(res_key);
1473 return rc;
1474 }
1475
1476 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)1477 smb2_ioctl_query_info(const unsigned int xid,
1478 struct cifs_tcon *tcon,
1479 struct cifs_sb_info *cifs_sb,
1480 __le16 *path, int is_dir,
1481 unsigned long p)
1482 {
1483 struct smb2_compound_vars *vars;
1484 struct smb_rqst *rqst;
1485 struct kvec *rsp_iov;
1486 struct cifs_ses *ses = tcon->ses;
1487 struct TCP_Server_Info *server = cifs_pick_channel(ses);
1488 char __user *arg = (char __user *)p;
1489 struct smb_query_info qi;
1490 struct smb_query_info __user *pqi;
1491 int rc = 0;
1492 int flags = CIFS_CP_CREATE_CLOSE_OP;
1493 struct smb2_query_info_rsp *qi_rsp = NULL;
1494 struct smb2_ioctl_rsp *io_rsp = NULL;
1495 void *buffer = NULL;
1496 int resp_buftype[3];
1497 struct cifs_open_parms oparms;
1498 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1499 struct cifs_fid fid;
1500 unsigned int size[2];
1501 void *data[2];
1502 int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR;
1503 void (*free_req1_func)(struct smb_rqst *r);
1504
1505 vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
1506 if (vars == NULL)
1507 return -ENOMEM;
1508 rqst = &vars->rqst[0];
1509 rsp_iov = &vars->rsp_iov[0];
1510
1511 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1512
1513 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) {
1514 rc = -EFAULT;
1515 goto free_vars;
1516 }
1517 if (qi.output_buffer_length > 1024) {
1518 rc = -EINVAL;
1519 goto free_vars;
1520 }
1521
1522 if (!ses || !server) {
1523 rc = -EIO;
1524 goto free_vars;
1525 }
1526
1527 if (smb3_encryption_required(tcon))
1528 flags |= CIFS_TRANSFORM_REQ;
1529
1530 if (qi.output_buffer_length) {
1531 buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length);
1532 if (IS_ERR(buffer)) {
1533 rc = PTR_ERR(buffer);
1534 goto free_vars;
1535 }
1536 }
1537
1538 /* Open */
1539 rqst[0].rq_iov = &vars->open_iov[0];
1540 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1541
1542 oparms = (struct cifs_open_parms) {
1543 .tcon = tcon,
1544 .disposition = FILE_OPEN,
1545 .create_options = cifs_create_options(cifs_sb, create_options),
1546 .fid = &fid,
1547 };
1548
1549 if (qi.flags & PASSTHRU_FSCTL) {
1550 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1551 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1552 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1553 break;
1554 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1555 oparms.desired_access = GENERIC_ALL;
1556 break;
1557 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1558 oparms.desired_access = GENERIC_READ;
1559 break;
1560 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1561 oparms.desired_access = GENERIC_WRITE;
1562 break;
1563 }
1564 } else if (qi.flags & PASSTHRU_SET_INFO) {
1565 oparms.desired_access = GENERIC_WRITE;
1566 } else {
1567 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1568 }
1569
1570 rc = SMB2_open_init(tcon, server,
1571 &rqst[0], &oplock, &oparms, path);
1572 if (rc)
1573 goto free_output_buffer;
1574 smb2_set_next_command(tcon, &rqst[0]);
1575
1576 /* Query */
1577 if (qi.flags & PASSTHRU_FSCTL) {
1578 /* Can eventually relax perm check since server enforces too */
1579 if (!capable(CAP_SYS_ADMIN)) {
1580 rc = -EPERM;
1581 goto free_open_req;
1582 }
1583 rqst[1].rq_iov = &vars->io_iov[0];
1584 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1585
1586 rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1587 qi.info_type, buffer, qi.output_buffer_length,
1588 CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE -
1589 MAX_SMB2_CLOSE_RESPONSE_SIZE);
1590 free_req1_func = SMB2_ioctl_free;
1591 } else if (qi.flags == PASSTHRU_SET_INFO) {
1592 /* Can eventually relax perm check since server enforces too */
1593 if (!capable(CAP_SYS_ADMIN)) {
1594 rc = -EPERM;
1595 goto free_open_req;
1596 }
1597 if (qi.output_buffer_length < 8) {
1598 rc = -EINVAL;
1599 goto free_open_req;
1600 }
1601 rqst[1].rq_iov = vars->si_iov;
1602 rqst[1].rq_nvec = 1;
1603
1604 /* MS-FSCC 2.4.13 FileEndOfFileInformation */
1605 size[0] = 8;
1606 data[0] = buffer;
1607
1608 rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID,
1609 current->tgid, FILE_END_OF_FILE_INFORMATION,
1610 SMB2_O_INFO_FILE, 0, data, size);
1611 free_req1_func = SMB2_set_info_free;
1612 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1613 rqst[1].rq_iov = &vars->qi_iov;
1614 rqst[1].rq_nvec = 1;
1615
1616 rc = SMB2_query_info_init(tcon, server,
1617 &rqst[1], COMPOUND_FID,
1618 COMPOUND_FID, qi.file_info_class,
1619 qi.info_type, qi.additional_information,
1620 qi.input_buffer_length,
1621 qi.output_buffer_length, buffer);
1622 free_req1_func = SMB2_query_info_free;
1623 } else { /* unknown flags */
1624 cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n",
1625 qi.flags);
1626 rc = -EINVAL;
1627 }
1628
1629 if (rc)
1630 goto free_open_req;
1631 smb2_set_next_command(tcon, &rqst[1]);
1632 smb2_set_related(&rqst[1]);
1633
1634 /* Close */
1635 rqst[2].rq_iov = &vars->close_iov;
1636 rqst[2].rq_nvec = 1;
1637
1638 rc = SMB2_close_init(tcon, server,
1639 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
1640 if (rc)
1641 goto free_req_1;
1642 smb2_set_related(&rqst[2]);
1643
1644 rc = compound_send_recv(xid, ses, server,
1645 flags, 3, rqst,
1646 resp_buftype, rsp_iov);
1647 if (rc)
1648 goto out;
1649
1650 /* No need to bump num_remote_opens since handle immediately closed */
1651 if (qi.flags & PASSTHRU_FSCTL) {
1652 pqi = (struct smb_query_info __user *)arg;
1653 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1654 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1655 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1656 if (qi.input_buffer_length > 0 &&
1657 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length
1658 > rsp_iov[1].iov_len) {
1659 rc = -EFAULT;
1660 goto out;
1661 }
1662
1663 if (copy_to_user(&pqi->input_buffer_length,
1664 &qi.input_buffer_length,
1665 sizeof(qi.input_buffer_length))) {
1666 rc = -EFAULT;
1667 goto out;
1668 }
1669
1670 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1671 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1672 qi.input_buffer_length))
1673 rc = -EFAULT;
1674 } else {
1675 pqi = (struct smb_query_info __user *)arg;
1676 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1677 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1678 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1679 if (copy_to_user(&pqi->input_buffer_length,
1680 &qi.input_buffer_length,
1681 sizeof(qi.input_buffer_length))) {
1682 rc = -EFAULT;
1683 goto out;
1684 }
1685
1686 if (copy_to_user(pqi + 1, qi_rsp->Buffer,
1687 qi.input_buffer_length))
1688 rc = -EFAULT;
1689 }
1690
1691 out:
1692 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1693 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1694 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1695 SMB2_close_free(&rqst[2]);
1696 free_req_1:
1697 free_req1_func(&rqst[1]);
1698 free_open_req:
1699 SMB2_open_free(&rqst[0]);
1700 free_output_buffer:
1701 kfree(buffer);
1702 free_vars:
1703 kfree(vars);
1704 return rc;
1705 }
1706
1707 static ssize_t
smb2_copychunk_range(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1708 smb2_copychunk_range(const unsigned int xid,
1709 struct cifsFileInfo *srcfile,
1710 struct cifsFileInfo *trgtfile, u64 src_off,
1711 u64 len, u64 dest_off)
1712 {
1713 int rc;
1714 unsigned int ret_data_len;
1715 struct copychunk_ioctl *pcchunk;
1716 struct copychunk_ioctl_rsp *retbuf = NULL;
1717 struct cifs_tcon *tcon;
1718 int chunks_copied = 0;
1719 bool chunk_sizes_updated = false;
1720 ssize_t bytes_written, total_bytes_written = 0;
1721
1722 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1723 if (pcchunk == NULL)
1724 return -ENOMEM;
1725
1726 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1727 /* Request a key from the server to identify the source of the copy */
1728 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1729 srcfile->fid.persistent_fid,
1730 srcfile->fid.volatile_fid, pcchunk);
1731
1732 /* Note: request_res_key sets res_key null only if rc !=0 */
1733 if (rc)
1734 goto cchunk_out;
1735
1736 /* For now array only one chunk long, will make more flexible later */
1737 pcchunk->ChunkCount = cpu_to_le32(1);
1738 pcchunk->Reserved = 0;
1739 pcchunk->Reserved2 = 0;
1740
1741 tcon = tlink_tcon(trgtfile->tlink);
1742
1743 while (len > 0) {
1744 pcchunk->SourceOffset = cpu_to_le64(src_off);
1745 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1746 pcchunk->Length =
1747 cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk));
1748
1749 /* Request server copy to target from src identified by key */
1750 kfree(retbuf);
1751 retbuf = NULL;
1752 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1753 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1754 (char *)pcchunk, sizeof(struct copychunk_ioctl),
1755 CIFSMaxBufSize, (char **)&retbuf, &ret_data_len);
1756 if (rc == 0) {
1757 if (ret_data_len !=
1758 sizeof(struct copychunk_ioctl_rsp)) {
1759 cifs_tcon_dbg(VFS, "Invalid cchunk response size\n");
1760 rc = -EIO;
1761 goto cchunk_out;
1762 }
1763 if (retbuf->TotalBytesWritten == 0) {
1764 cifs_dbg(FYI, "no bytes copied\n");
1765 rc = -EIO;
1766 goto cchunk_out;
1767 }
1768 /*
1769 * Check if server claimed to write more than we asked
1770 */
1771 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1772 le32_to_cpu(pcchunk->Length)) {
1773 cifs_tcon_dbg(VFS, "Invalid copy chunk response\n");
1774 rc = -EIO;
1775 goto cchunk_out;
1776 }
1777 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1778 cifs_tcon_dbg(VFS, "Invalid num chunks written\n");
1779 rc = -EIO;
1780 goto cchunk_out;
1781 }
1782 chunks_copied++;
1783
1784 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1785 src_off += bytes_written;
1786 dest_off += bytes_written;
1787 len -= bytes_written;
1788 total_bytes_written += bytes_written;
1789
1790 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1791 le32_to_cpu(retbuf->ChunksWritten),
1792 le32_to_cpu(retbuf->ChunkBytesWritten),
1793 bytes_written);
1794 } else if (rc == -EINVAL) {
1795 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1796 goto cchunk_out;
1797
1798 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1799 le32_to_cpu(retbuf->ChunksWritten),
1800 le32_to_cpu(retbuf->ChunkBytesWritten),
1801 le32_to_cpu(retbuf->TotalBytesWritten));
1802
1803 /*
1804 * Check if this is the first request using these sizes,
1805 * (ie check if copy succeed once with original sizes
1806 * and check if the server gave us different sizes after
1807 * we already updated max sizes on previous request).
1808 * if not then why is the server returning an error now
1809 */
1810 if ((chunks_copied != 0) || chunk_sizes_updated)
1811 goto cchunk_out;
1812
1813 /* Check that server is not asking us to grow size */
1814 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1815 tcon->max_bytes_chunk)
1816 tcon->max_bytes_chunk =
1817 le32_to_cpu(retbuf->ChunkBytesWritten);
1818 else
1819 goto cchunk_out; /* server gave us bogus size */
1820
1821 /* No need to change MaxChunks since already set to 1 */
1822 chunk_sizes_updated = true;
1823 } else
1824 goto cchunk_out;
1825 }
1826
1827 cchunk_out:
1828 kfree(pcchunk);
1829 kfree(retbuf);
1830 if (rc)
1831 return rc;
1832 else
1833 return total_bytes_written;
1834 }
1835
1836 static int
smb2_flush_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)1837 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1838 struct cifs_fid *fid)
1839 {
1840 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1841 }
1842
1843 static unsigned int
smb2_read_data_offset(char * buf)1844 smb2_read_data_offset(char *buf)
1845 {
1846 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1847
1848 return rsp->DataOffset;
1849 }
1850
1851 static unsigned int
smb2_read_data_length(char * buf,bool in_remaining)1852 smb2_read_data_length(char *buf, bool in_remaining)
1853 {
1854 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1855
1856 if (in_remaining)
1857 return le32_to_cpu(rsp->DataRemaining);
1858
1859 return le32_to_cpu(rsp->DataLength);
1860 }
1861
1862
1863 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)1864 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1865 struct cifs_io_parms *parms, unsigned int *bytes_read,
1866 char **buf, int *buf_type)
1867 {
1868 parms->persistent_fid = pfid->persistent_fid;
1869 parms->volatile_fid = pfid->volatile_fid;
1870 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1871 }
1872
1873 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)1874 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1875 struct cifs_io_parms *parms, unsigned int *written,
1876 struct kvec *iov, unsigned long nr_segs)
1877 {
1878
1879 parms->persistent_fid = pfid->persistent_fid;
1880 parms->volatile_fid = pfid->volatile_fid;
1881 return SMB2_write(xid, parms, written, iov, nr_segs);
1882 }
1883
1884 /* 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)1885 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1886 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1887 {
1888 struct cifsInodeInfo *cifsi;
1889 int rc;
1890
1891 cifsi = CIFS_I(inode);
1892
1893 /* if file already sparse don't bother setting sparse again */
1894 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1895 return true; /* already sparse */
1896
1897 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1898 return true; /* already not sparse */
1899
1900 /*
1901 * Can't check for sparse support on share the usual way via the
1902 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1903 * since Samba server doesn't set the flag on the share, yet
1904 * supports the set sparse FSCTL and returns sparse correctly
1905 * in the file attributes. If we fail setting sparse though we
1906 * mark that server does not support sparse files for this share
1907 * to avoid repeatedly sending the unsupported fsctl to server
1908 * if the file is repeatedly extended.
1909 */
1910 if (tcon->broken_sparse_sup)
1911 return false;
1912
1913 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1914 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1915 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1916 if (rc) {
1917 tcon->broken_sparse_sup = true;
1918 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1919 return false;
1920 }
1921
1922 if (setsparse)
1923 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1924 else
1925 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1926
1927 return true;
1928 }
1929
1930 static int
smb2_set_file_size(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,__u64 size,bool set_alloc)1931 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1932 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1933 {
1934 __le64 eof = cpu_to_le64(size);
1935 struct inode *inode;
1936
1937 /*
1938 * If extending file more than one page make sparse. Many Linux fs
1939 * make files sparse by default when extending via ftruncate
1940 */
1941 inode = d_inode(cfile->dentry);
1942
1943 if (!set_alloc && (size > inode->i_size + 8192)) {
1944 __u8 set_sparse = 1;
1945
1946 /* whether set sparse succeeds or not, extend the file */
1947 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1948 }
1949
1950 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1951 cfile->fid.volatile_fid, cfile->pid, &eof);
1952 }
1953
1954 static int
smb2_duplicate_extents(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)1955 smb2_duplicate_extents(const unsigned int xid,
1956 struct cifsFileInfo *srcfile,
1957 struct cifsFileInfo *trgtfile, u64 src_off,
1958 u64 len, u64 dest_off)
1959 {
1960 int rc;
1961 unsigned int ret_data_len;
1962 struct inode *inode;
1963 struct duplicate_extents_to_file dup_ext_buf;
1964 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1965
1966 /* server fileays advertise duplicate extent support with this flag */
1967 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1968 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1969 return -EOPNOTSUPP;
1970
1971 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1972 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1973 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1974 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1975 dup_ext_buf.ByteCount = cpu_to_le64(len);
1976 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1977 src_off, dest_off, len);
1978
1979 inode = d_inode(trgtfile->dentry);
1980 if (inode->i_size < dest_off + len) {
1981 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1982 if (rc)
1983 goto duplicate_extents_out;
1984
1985 /*
1986 * Although also could set plausible allocation size (i_blocks)
1987 * here in addition to setting the file size, in reflink
1988 * it is likely that the target file is sparse. Its allocation
1989 * size will be queried on next revalidate, but it is important
1990 * to make sure that file's cached size is updated immediately
1991 */
1992 cifs_setsize(inode, dest_off + len);
1993 }
1994 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1995 trgtfile->fid.volatile_fid,
1996 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1997 (char *)&dup_ext_buf,
1998 sizeof(struct duplicate_extents_to_file),
1999 CIFSMaxBufSize, NULL,
2000 &ret_data_len);
2001
2002 if (ret_data_len > 0)
2003 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
2004
2005 duplicate_extents_out:
2006 return rc;
2007 }
2008
2009 static int
smb2_set_compression(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2010 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
2011 struct cifsFileInfo *cfile)
2012 {
2013 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
2014 cfile->fid.volatile_fid);
2015 }
2016
2017 static int
smb3_set_integrity(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)2018 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
2019 struct cifsFileInfo *cfile)
2020 {
2021 struct fsctl_set_integrity_information_req integr_info;
2022 unsigned int ret_data_len;
2023
2024 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
2025 integr_info.Flags = 0;
2026 integr_info.Reserved = 0;
2027
2028 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2029 cfile->fid.volatile_fid,
2030 FSCTL_SET_INTEGRITY_INFORMATION,
2031 (char *)&integr_info,
2032 sizeof(struct fsctl_set_integrity_information_req),
2033 CIFSMaxBufSize, NULL,
2034 &ret_data_len);
2035
2036 }
2037
2038 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
2039 #define GMT_TOKEN_SIZE 50
2040
2041 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
2042
2043 /*
2044 * Input buffer contains (empty) struct smb_snapshot array with size filled in
2045 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
2046 */
2047 static int
smb3_enum_snapshots(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,void __user * ioc_buf)2048 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
2049 struct cifsFileInfo *cfile, void __user *ioc_buf)
2050 {
2051 char *retbuf = NULL;
2052 unsigned int ret_data_len = 0;
2053 int rc;
2054 u32 max_response_size;
2055 struct smb_snapshot_array snapshot_in;
2056
2057 /*
2058 * On the first query to enumerate the list of snapshots available
2059 * for this volume the buffer begins with 0 (number of snapshots
2060 * which can be returned is zero since at that point we do not know
2061 * how big the buffer needs to be). On the second query,
2062 * it (ret_data_len) is set to number of snapshots so we can
2063 * know to set the maximum response size larger (see below).
2064 */
2065 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
2066 return -EFAULT;
2067
2068 /*
2069 * Note that for snapshot queries that servers like Azure expect that
2070 * the first query be minimal size (and just used to get the number/size
2071 * of previous versions) so response size must be specified as EXACTLY
2072 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
2073 * of eight bytes.
2074 */
2075 if (ret_data_len == 0)
2076 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
2077 else
2078 max_response_size = CIFSMaxBufSize;
2079
2080 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2081 cfile->fid.volatile_fid,
2082 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
2083 NULL, 0 /* no input data */, max_response_size,
2084 (char **)&retbuf,
2085 &ret_data_len);
2086 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
2087 rc, ret_data_len);
2088 if (rc)
2089 return rc;
2090
2091 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
2092 /* Fixup buffer */
2093 if (copy_from_user(&snapshot_in, ioc_buf,
2094 sizeof(struct smb_snapshot_array))) {
2095 rc = -EFAULT;
2096 kfree(retbuf);
2097 return rc;
2098 }
2099
2100 /*
2101 * Check for min size, ie not large enough to fit even one GMT
2102 * token (snapshot). On the first ioctl some users may pass in
2103 * smaller size (or zero) to simply get the size of the array
2104 * so the user space caller can allocate sufficient memory
2105 * and retry the ioctl again with larger array size sufficient
2106 * to hold all of the snapshot GMT tokens on the second try.
2107 */
2108 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
2109 ret_data_len = sizeof(struct smb_snapshot_array);
2110
2111 /*
2112 * We return struct SRV_SNAPSHOT_ARRAY, followed by
2113 * the snapshot array (of 50 byte GMT tokens) each
2114 * representing an available previous version of the data
2115 */
2116 if (ret_data_len > (snapshot_in.snapshot_array_size +
2117 sizeof(struct smb_snapshot_array)))
2118 ret_data_len = snapshot_in.snapshot_array_size +
2119 sizeof(struct smb_snapshot_array);
2120
2121 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
2122 rc = -EFAULT;
2123 }
2124
2125 kfree(retbuf);
2126 return rc;
2127 }
2128
2129
2130
2131 static int
smb3_notify(const unsigned int xid,struct file * pfile,void __user * ioc_buf,bool return_changes)2132 smb3_notify(const unsigned int xid, struct file *pfile,
2133 void __user *ioc_buf, bool return_changes)
2134 {
2135 struct smb3_notify_info notify;
2136 struct smb3_notify_info __user *pnotify_buf;
2137 struct dentry *dentry = pfile->f_path.dentry;
2138 struct inode *inode = file_inode(pfile);
2139 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2140 struct cifs_open_parms oparms;
2141 struct cifs_fid fid;
2142 struct cifs_tcon *tcon;
2143 const unsigned char *path;
2144 char *returned_ioctl_info = NULL;
2145 void *page = alloc_dentry_path();
2146 __le16 *utf16_path = NULL;
2147 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2148 int rc = 0;
2149 __u32 ret_len = 0;
2150
2151 path = build_path_from_dentry(dentry, page);
2152 if (IS_ERR(path)) {
2153 rc = PTR_ERR(path);
2154 goto notify_exit;
2155 }
2156
2157 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2158 if (utf16_path == NULL) {
2159 rc = -ENOMEM;
2160 goto notify_exit;
2161 }
2162
2163 if (return_changes) {
2164 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) {
2165 rc = -EFAULT;
2166 goto notify_exit;
2167 }
2168 } else {
2169 if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) {
2170 rc = -EFAULT;
2171 goto notify_exit;
2172 }
2173 notify.data_len = 0;
2174 }
2175
2176 tcon = cifs_sb_master_tcon(cifs_sb);
2177 oparms = (struct cifs_open_parms) {
2178 .tcon = tcon,
2179 .path = path,
2180 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2181 .disposition = FILE_OPEN,
2182 .create_options = cifs_create_options(cifs_sb, 0),
2183 .fid = &fid,
2184 };
2185
2186 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
2187 NULL);
2188 if (rc)
2189 goto notify_exit;
2190
2191 rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid,
2192 notify.watch_tree, notify.completion_filter,
2193 notify.data_len, &returned_ioctl_info, &ret_len);
2194
2195 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2196
2197 cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc);
2198 if (return_changes && (ret_len > 0) && (notify.data_len > 0)) {
2199 if (ret_len > notify.data_len)
2200 ret_len = notify.data_len;
2201 pnotify_buf = (struct smb3_notify_info __user *)ioc_buf;
2202 if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len))
2203 rc = -EFAULT;
2204 else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len)))
2205 rc = -EFAULT;
2206 }
2207 kfree(returned_ioctl_info);
2208 notify_exit:
2209 free_dentry_path(page);
2210 kfree(utf16_path);
2211 return rc;
2212 }
2213
2214 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)2215 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
2216 const char *path, struct cifs_sb_info *cifs_sb,
2217 struct cifs_fid *fid, __u16 search_flags,
2218 struct cifs_search_info *srch_inf)
2219 {
2220 __le16 *utf16_path;
2221 struct smb_rqst rqst[2];
2222 struct kvec rsp_iov[2];
2223 int resp_buftype[2];
2224 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2225 struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE];
2226 int rc, flags = 0;
2227 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2228 struct cifs_open_parms oparms;
2229 struct smb2_query_directory_rsp *qd_rsp = NULL;
2230 struct smb2_create_rsp *op_rsp = NULL;
2231 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
2232 int retry_count = 0;
2233
2234 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2235 if (!utf16_path)
2236 return -ENOMEM;
2237
2238 if (smb3_encryption_required(tcon))
2239 flags |= CIFS_TRANSFORM_REQ;
2240
2241 memset(rqst, 0, sizeof(rqst));
2242 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
2243 memset(rsp_iov, 0, sizeof(rsp_iov));
2244
2245 /* Open */
2246 memset(&open_iov, 0, sizeof(open_iov));
2247 rqst[0].rq_iov = open_iov;
2248 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2249
2250 oparms = (struct cifs_open_parms) {
2251 .tcon = tcon,
2252 .path = path,
2253 .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA,
2254 .disposition = FILE_OPEN,
2255 .create_options = cifs_create_options(cifs_sb, 0),
2256 .fid = fid,
2257 };
2258
2259 rc = SMB2_open_init(tcon, server,
2260 &rqst[0], &oplock, &oparms, utf16_path);
2261 if (rc)
2262 goto qdf_free;
2263 smb2_set_next_command(tcon, &rqst[0]);
2264
2265 /* Query directory */
2266 srch_inf->entries_in_buffer = 0;
2267 srch_inf->index_of_last_entry = 2;
2268
2269 memset(&qd_iov, 0, sizeof(qd_iov));
2270 rqst[1].rq_iov = qd_iov;
2271 rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE;
2272
2273 rc = SMB2_query_directory_init(xid, tcon, server,
2274 &rqst[1],
2275 COMPOUND_FID, COMPOUND_FID,
2276 0, srch_inf->info_level);
2277 if (rc)
2278 goto qdf_free;
2279
2280 smb2_set_related(&rqst[1]);
2281
2282 again:
2283 rc = compound_send_recv(xid, tcon->ses, server,
2284 flags, 2, rqst,
2285 resp_buftype, rsp_iov);
2286
2287 if (rc == -EAGAIN && retry_count++ < 10)
2288 goto again;
2289
2290 /* If the open failed there is nothing to do */
2291 op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
2292 if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) {
2293 cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc);
2294 goto qdf_free;
2295 }
2296 fid->persistent_fid = op_rsp->PersistentFileId;
2297 fid->volatile_fid = op_rsp->VolatileFileId;
2298
2299 /* Anything else than ENODATA means a genuine error */
2300 if (rc && rc != -ENODATA) {
2301 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2302 cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc);
2303 trace_smb3_query_dir_err(xid, fid->persistent_fid,
2304 tcon->tid, tcon->ses->Suid, 0, 0, rc);
2305 goto qdf_free;
2306 }
2307
2308 atomic_inc(&tcon->num_remote_opens);
2309
2310 qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base;
2311 if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) {
2312 trace_smb3_query_dir_done(xid, fid->persistent_fid,
2313 tcon->tid, tcon->ses->Suid, 0, 0);
2314 srch_inf->endOfSearch = true;
2315 rc = 0;
2316 goto qdf_free;
2317 }
2318
2319 rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1],
2320 srch_inf);
2321 if (rc) {
2322 trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid,
2323 tcon->ses->Suid, 0, 0, rc);
2324 goto qdf_free;
2325 }
2326 resp_buftype[1] = CIFS_NO_BUFFER;
2327
2328 trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid,
2329 tcon->ses->Suid, 0, srch_inf->entries_in_buffer);
2330
2331 qdf_free:
2332 kfree(utf16_path);
2333 SMB2_open_free(&rqst[0]);
2334 SMB2_query_directory_free(&rqst[1]);
2335 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2336 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2337 return rc;
2338 }
2339
2340 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)2341 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2342 struct cifs_fid *fid, __u16 search_flags,
2343 struct cifs_search_info *srch_inf)
2344 {
2345 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2346 fid->volatile_fid, 0, srch_inf);
2347 }
2348
2349 static int
smb2_close_dir(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)2350 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2351 struct cifs_fid *fid)
2352 {
2353 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2354 }
2355
2356 /*
2357 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2358 * the number of credits and return true. Otherwise - return false.
2359 */
2360 static bool
smb2_is_status_pending(char * buf,struct TCP_Server_Info * server)2361 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2362 {
2363 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2364 int scredits, in_flight;
2365
2366 if (shdr->Status != STATUS_PENDING)
2367 return false;
2368
2369 if (shdr->CreditRequest) {
2370 spin_lock(&server->req_lock);
2371 server->credits += le16_to_cpu(shdr->CreditRequest);
2372 scredits = server->credits;
2373 in_flight = server->in_flight;
2374 spin_unlock(&server->req_lock);
2375 wake_up(&server->request_q);
2376
2377 trace_smb3_pend_credits(server->CurrentMid,
2378 server->conn_id, server->hostname, scredits,
2379 le16_to_cpu(shdr->CreditRequest), in_flight);
2380 cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n",
2381 __func__, le16_to_cpu(shdr->CreditRequest), scredits);
2382 }
2383
2384 return true;
2385 }
2386
2387 static bool
smb2_is_session_expired(char * buf)2388 smb2_is_session_expired(char *buf)
2389 {
2390 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2391
2392 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2393 shdr->Status != STATUS_USER_SESSION_DELETED)
2394 return false;
2395
2396 trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId),
2397 le64_to_cpu(shdr->SessionId),
2398 le16_to_cpu(shdr->Command),
2399 le64_to_cpu(shdr->MessageId));
2400 cifs_dbg(FYI, "Session expired or deleted\n");
2401
2402 return true;
2403 }
2404
2405 static bool
smb2_is_status_io_timeout(char * buf)2406 smb2_is_status_io_timeout(char *buf)
2407 {
2408 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2409
2410 if (shdr->Status == STATUS_IO_TIMEOUT)
2411 return true;
2412 else
2413 return false;
2414 }
2415
2416 static bool
smb2_is_network_name_deleted(char * buf,struct TCP_Server_Info * server)2417 smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server)
2418 {
2419 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
2420 struct TCP_Server_Info *pserver;
2421 struct cifs_ses *ses;
2422 struct cifs_tcon *tcon;
2423
2424 if (shdr->Status != STATUS_NETWORK_NAME_DELETED)
2425 return false;
2426
2427 /* If server is a channel, select the primary channel */
2428 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
2429
2430 spin_lock(&cifs_tcp_ses_lock);
2431 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
2432 list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
2433 if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) {
2434 spin_lock(&tcon->tc_lock);
2435 tcon->need_reconnect = true;
2436 spin_unlock(&tcon->tc_lock);
2437 spin_unlock(&cifs_tcp_ses_lock);
2438 pr_warn_once("Server share %s deleted.\n",
2439 tcon->tree_name);
2440 return true;
2441 }
2442 }
2443 }
2444 spin_unlock(&cifs_tcp_ses_lock);
2445
2446 return false;
2447 }
2448
2449 static int
smb2_oplock_response(struct cifs_tcon * tcon,__u64 persistent_fid,__u64 volatile_fid,__u16 net_fid,struct cifsInodeInfo * cinode)2450 smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid,
2451 __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode)
2452 {
2453 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2454 return SMB2_lease_break(0, tcon, cinode->lease_key,
2455 smb2_get_lease_state(cinode));
2456
2457 return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid,
2458 CIFS_CACHE_READ(cinode) ? 1 : 0);
2459 }
2460
2461 void
smb2_set_related(struct smb_rqst * rqst)2462 smb2_set_related(struct smb_rqst *rqst)
2463 {
2464 struct smb2_hdr *shdr;
2465
2466 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2467 if (shdr == NULL) {
2468 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2469 return;
2470 }
2471 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2472 }
2473
2474 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2475
2476 void
smb2_set_next_command(struct cifs_tcon * tcon,struct smb_rqst * rqst)2477 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2478 {
2479 struct smb2_hdr *shdr;
2480 struct cifs_ses *ses = tcon->ses;
2481 struct TCP_Server_Info *server = ses->server;
2482 unsigned long len = smb_rqst_len(server, rqst);
2483 int i, num_padding;
2484
2485 shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base);
2486 if (shdr == NULL) {
2487 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2488 return;
2489 }
2490
2491 /* SMB headers in a compound are 8 byte aligned. */
2492
2493 /* No padding needed */
2494 if (!(len & 7))
2495 goto finished;
2496
2497 num_padding = 8 - (len & 7);
2498 if (!smb3_encryption_required(tcon)) {
2499 /*
2500 * If we do not have encryption then we can just add an extra
2501 * iov for the padding.
2502 */
2503 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2504 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2505 rqst->rq_nvec++;
2506 len += num_padding;
2507 } else {
2508 /*
2509 * We can not add a small padding iov for the encryption case
2510 * because the encryption framework can not handle the padding
2511 * iovs.
2512 * We have to flatten this into a single buffer and add
2513 * the padding to it.
2514 */
2515 for (i = 1; i < rqst->rq_nvec; i++) {
2516 memcpy(rqst->rq_iov[0].iov_base +
2517 rqst->rq_iov[0].iov_len,
2518 rqst->rq_iov[i].iov_base,
2519 rqst->rq_iov[i].iov_len);
2520 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2521 }
2522 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2523 0, num_padding);
2524 rqst->rq_iov[0].iov_len += num_padding;
2525 len += num_padding;
2526 rqst->rq_nvec = 1;
2527 }
2528
2529 finished:
2530 shdr->NextCommand = cpu_to_le32(len);
2531 }
2532
2533 /*
2534 * Passes the query info response back to the caller on success.
2535 * Caller need to free this with free_rsp_buf().
2536 */
2537 int
smb2_query_info_compound(const unsigned int xid,struct cifs_tcon * tcon,const char * path,u32 desired_access,u32 class,u32 type,u32 output_len,struct kvec * rsp,int * buftype,struct cifs_sb_info * cifs_sb)2538 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2539 const char *path, u32 desired_access,
2540 u32 class, u32 type, u32 output_len,
2541 struct kvec *rsp, int *buftype,
2542 struct cifs_sb_info *cifs_sb)
2543 {
2544 struct smb2_compound_vars *vars;
2545 struct cifs_ses *ses = tcon->ses;
2546 struct TCP_Server_Info *server = cifs_pick_channel(ses);
2547 int flags = CIFS_CP_CREATE_CLOSE_OP;
2548 struct smb_rqst *rqst;
2549 int resp_buftype[3];
2550 struct kvec *rsp_iov;
2551 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2552 struct cifs_open_parms oparms;
2553 struct cifs_fid fid;
2554 int rc;
2555 __le16 *utf16_path;
2556 struct cached_fid *cfid = NULL;
2557
2558 if (!path)
2559 path = "";
2560 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2561 if (!utf16_path)
2562 return -ENOMEM;
2563
2564 if (smb3_encryption_required(tcon))
2565 flags |= CIFS_TRANSFORM_REQ;
2566
2567 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2568 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
2569 if (!vars) {
2570 rc = -ENOMEM;
2571 goto out_free_path;
2572 }
2573 rqst = vars->rqst;
2574 rsp_iov = vars->rsp_iov;
2575
2576 /*
2577 * We can only call this for things we know are directories.
2578 */
2579 if (!strcmp(path, ""))
2580 open_cached_dir(xid, tcon, path, cifs_sb, false,
2581 &cfid); /* cfid null if open dir failed */
2582
2583 rqst[0].rq_iov = vars->open_iov;
2584 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2585
2586 oparms = (struct cifs_open_parms) {
2587 .tcon = tcon,
2588 .path = path,
2589 .desired_access = desired_access,
2590 .disposition = FILE_OPEN,
2591 .create_options = cifs_create_options(cifs_sb, 0),
2592 .fid = &fid,
2593 };
2594
2595 rc = SMB2_open_init(tcon, server,
2596 &rqst[0], &oplock, &oparms, utf16_path);
2597 if (rc)
2598 goto qic_exit;
2599 smb2_set_next_command(tcon, &rqst[0]);
2600
2601 rqst[1].rq_iov = &vars->qi_iov;
2602 rqst[1].rq_nvec = 1;
2603
2604 if (cfid) {
2605 rc = SMB2_query_info_init(tcon, server,
2606 &rqst[1],
2607 cfid->fid.persistent_fid,
2608 cfid->fid.volatile_fid,
2609 class, type, 0,
2610 output_len, 0,
2611 NULL);
2612 } else {
2613 rc = SMB2_query_info_init(tcon, server,
2614 &rqst[1],
2615 COMPOUND_FID,
2616 COMPOUND_FID,
2617 class, type, 0,
2618 output_len, 0,
2619 NULL);
2620 }
2621 if (rc)
2622 goto qic_exit;
2623 if (!cfid) {
2624 smb2_set_next_command(tcon, &rqst[1]);
2625 smb2_set_related(&rqst[1]);
2626 }
2627
2628 rqst[2].rq_iov = &vars->close_iov;
2629 rqst[2].rq_nvec = 1;
2630
2631 rc = SMB2_close_init(tcon, server,
2632 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
2633 if (rc)
2634 goto qic_exit;
2635 smb2_set_related(&rqst[2]);
2636
2637 if (cfid) {
2638 rc = compound_send_recv(xid, ses, server,
2639 flags, 1, &rqst[1],
2640 &resp_buftype[1], &rsp_iov[1]);
2641 } else {
2642 rc = compound_send_recv(xid, ses, server,
2643 flags, 3, rqst,
2644 resp_buftype, rsp_iov);
2645 }
2646 if (rc) {
2647 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2648 if (rc == -EREMCHG) {
2649 tcon->need_reconnect = true;
2650 pr_warn_once("server share %s deleted\n",
2651 tcon->tree_name);
2652 }
2653 goto qic_exit;
2654 }
2655 *rsp = rsp_iov[1];
2656 *buftype = resp_buftype[1];
2657
2658 qic_exit:
2659 SMB2_open_free(&rqst[0]);
2660 SMB2_query_info_free(&rqst[1]);
2661 SMB2_close_free(&rqst[2]);
2662 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2663 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2664 if (cfid)
2665 close_cached_dir(cfid);
2666 kfree(vars);
2667 out_free_path:
2668 kfree(utf16_path);
2669 return rc;
2670 }
2671
2672 static int
smb2_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2673 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2674 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2675 {
2676 struct smb2_query_info_rsp *rsp;
2677 struct smb2_fs_full_size_info *info = NULL;
2678 struct kvec rsp_iov = {NULL, 0};
2679 int buftype = CIFS_NO_BUFFER;
2680 int rc;
2681
2682
2683 rc = smb2_query_info_compound(xid, tcon, "",
2684 FILE_READ_ATTRIBUTES,
2685 FS_FULL_SIZE_INFORMATION,
2686 SMB2_O_INFO_FILESYSTEM,
2687 sizeof(struct smb2_fs_full_size_info),
2688 &rsp_iov, &buftype, cifs_sb);
2689 if (rc)
2690 goto qfs_exit;
2691
2692 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2693 buf->f_type = SMB2_SUPER_MAGIC;
2694 info = (struct smb2_fs_full_size_info *)(
2695 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2696 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2697 le32_to_cpu(rsp->OutputBufferLength),
2698 &rsp_iov,
2699 sizeof(struct smb2_fs_full_size_info));
2700 if (!rc)
2701 smb2_copy_fs_info_to_kstatfs(info, buf);
2702
2703 qfs_exit:
2704 trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc);
2705 free_rsp_buf(buftype, rsp_iov.iov_base);
2706 return rc;
2707 }
2708
2709 static int
smb311_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,struct kstatfs * buf)2710 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2711 struct cifs_sb_info *cifs_sb, struct kstatfs *buf)
2712 {
2713 int rc;
2714 __le16 srch_path = 0; /* Null - open root of share */
2715 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2716 struct cifs_open_parms oparms;
2717 struct cifs_fid fid;
2718
2719 if (!tcon->posix_extensions)
2720 return smb2_queryfs(xid, tcon, cifs_sb, buf);
2721
2722 oparms = (struct cifs_open_parms) {
2723 .tcon = tcon,
2724 .path = "",
2725 .desired_access = FILE_READ_ATTRIBUTES,
2726 .disposition = FILE_OPEN,
2727 .create_options = cifs_create_options(cifs_sb, 0),
2728 .fid = &fid,
2729 };
2730
2731 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
2732 NULL, NULL);
2733 if (rc)
2734 return rc;
2735
2736 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2737 fid.volatile_fid, buf);
2738 buf->f_type = SMB2_SUPER_MAGIC;
2739 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2740 return rc;
2741 }
2742
2743 static bool
smb2_compare_fids(struct cifsFileInfo * ob1,struct cifsFileInfo * ob2)2744 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2745 {
2746 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2747 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2748 }
2749
2750 static int
smb2_mand_lock(const unsigned int xid,struct cifsFileInfo * cfile,__u64 offset,__u64 length,__u32 type,int lock,int unlock,bool wait)2751 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2752 __u64 length, __u32 type, int lock, int unlock, bool wait)
2753 {
2754 if (unlock && !lock)
2755 type = SMB2_LOCKFLAG_UNLOCK;
2756 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2757 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2758 current->tgid, length, offset, type, wait);
2759 }
2760
2761 static void
smb2_get_lease_key(struct inode * inode,struct cifs_fid * fid)2762 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2763 {
2764 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2765 }
2766
2767 static void
smb2_set_lease_key(struct inode * inode,struct cifs_fid * fid)2768 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2769 {
2770 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2771 }
2772
2773 static void
smb2_new_lease_key(struct cifs_fid * fid)2774 smb2_new_lease_key(struct cifs_fid *fid)
2775 {
2776 generate_random_uuid(fid->lease_key);
2777 }
2778
2779 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)2780 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2781 const char *search_name,
2782 struct dfs_info3_param **target_nodes,
2783 unsigned int *num_of_nodes,
2784 const struct nls_table *nls_codepage, int remap)
2785 {
2786 int rc;
2787 __le16 *utf16_path = NULL;
2788 int utf16_path_len = 0;
2789 struct cifs_tcon *tcon;
2790 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2791 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2792 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2793 int retry_count = 0;
2794
2795 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2796
2797 /*
2798 * Try to use the IPC tcon, otherwise just use any
2799 */
2800 tcon = ses->tcon_ipc;
2801 if (tcon == NULL) {
2802 spin_lock(&cifs_tcp_ses_lock);
2803 tcon = list_first_entry_or_null(&ses->tcon_list,
2804 struct cifs_tcon,
2805 tcon_list);
2806 if (tcon)
2807 tcon->tc_count++;
2808 spin_unlock(&cifs_tcp_ses_lock);
2809 }
2810
2811 if (tcon == NULL) {
2812 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2813 ses);
2814 rc = -ENOTCONN;
2815 goto out;
2816 }
2817
2818 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2819 &utf16_path_len,
2820 nls_codepage, remap);
2821 if (!utf16_path) {
2822 rc = -ENOMEM;
2823 goto out;
2824 }
2825
2826 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2827 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2828 if (!dfs_req) {
2829 rc = -ENOMEM;
2830 goto out;
2831 }
2832
2833 /* Highest DFS referral version understood */
2834 dfs_req->MaxReferralLevel = DFS_VERSION;
2835
2836 /* Path to resolve in an UTF-16 null-terminated string */
2837 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2838
2839 do {
2840 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2841 FSCTL_DFS_GET_REFERRALS,
2842 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2843 (char **)&dfs_rsp, &dfs_rsp_size);
2844 if (!is_retryable_error(rc))
2845 break;
2846 usleep_range(512, 2048);
2847 } while (++retry_count < 5);
2848
2849 if (!rc && !dfs_rsp)
2850 rc = -EIO;
2851 if (rc) {
2852 if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP)
2853 cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc);
2854 goto out;
2855 }
2856
2857 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2858 num_of_nodes, target_nodes,
2859 nls_codepage, remap, search_name,
2860 true /* is_unicode */);
2861 if (rc) {
2862 cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2863 goto out;
2864 }
2865
2866 out:
2867 if (tcon && !tcon->ipc) {
2868 /* ipc tcons are not refcounted */
2869 spin_lock(&cifs_tcp_ses_lock);
2870 tcon->tc_count--;
2871 /* tc_count can never go negative */
2872 WARN_ON(tcon->tc_count < 0);
2873 spin_unlock(&cifs_tcp_ses_lock);
2874 }
2875 kfree(utf16_path);
2876 kfree(dfs_req);
2877 kfree(dfs_rsp);
2878 return rc;
2879 }
2880
2881 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
parse_reparse_posix(struct reparse_posix_data * buf,struct cifs_sb_info * cifs_sb,struct cifs_open_info_data * data)2882 static int parse_reparse_posix(struct reparse_posix_data *buf,
2883 struct cifs_sb_info *cifs_sb,
2884 struct cifs_open_info_data *data)
2885 {
2886 unsigned int len;
2887 u64 type;
2888
2889 switch ((type = le64_to_cpu(buf->InodeType))) {
2890 case NFS_SPECFILE_LNK:
2891 len = le16_to_cpu(buf->ReparseDataLength);
2892 data->symlink_target = cifs_strndup_from_utf16(buf->DataBuffer,
2893 len, true,
2894 cifs_sb->local_nls);
2895 if (!data->symlink_target)
2896 return -ENOMEM;
2897 convert_delimiter(data->symlink_target, '/');
2898 cifs_dbg(FYI, "%s: target path: %s\n",
2899 __func__, data->symlink_target);
2900 break;
2901 case NFS_SPECFILE_CHR:
2902 case NFS_SPECFILE_BLK:
2903 case NFS_SPECFILE_FIFO:
2904 case NFS_SPECFILE_SOCK:
2905 break;
2906 default:
2907 cifs_dbg(VFS, "%s: unhandled inode type: 0x%llx\n",
2908 __func__, type);
2909 return -EOPNOTSUPP;
2910 }
2911 return 0;
2912 }
2913
parse_reparse_symlink(struct reparse_symlink_data_buffer * sym,u32 plen,bool unicode,struct cifs_sb_info * cifs_sb,struct cifs_open_info_data * data)2914 static int parse_reparse_symlink(struct reparse_symlink_data_buffer *sym,
2915 u32 plen, bool unicode,
2916 struct cifs_sb_info *cifs_sb,
2917 struct cifs_open_info_data *data)
2918 {
2919 unsigned int len;
2920 unsigned int offs;
2921
2922 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2923
2924 offs = le16_to_cpu(sym->SubstituteNameOffset);
2925 len = le16_to_cpu(sym->SubstituteNameLength);
2926 if (offs + 20 > plen || offs + len + 20 > plen) {
2927 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2928 return -EIO;
2929 }
2930
2931 data->symlink_target = cifs_strndup_from_utf16(sym->PathBuffer + offs,
2932 len, unicode,
2933 cifs_sb->local_nls);
2934 if (!data->symlink_target)
2935 return -ENOMEM;
2936
2937 convert_delimiter(data->symlink_target, '/');
2938 cifs_dbg(FYI, "%s: target path: %s\n", __func__, data->symlink_target);
2939
2940 return 0;
2941 }
2942
parse_reparse_point(struct reparse_data_buffer * buf,u32 plen,struct cifs_sb_info * cifs_sb,bool unicode,struct cifs_open_info_data * data)2943 int parse_reparse_point(struct reparse_data_buffer *buf,
2944 u32 plen, struct cifs_sb_info *cifs_sb,
2945 bool unicode, struct cifs_open_info_data *data)
2946 {
2947 if (plen < sizeof(*buf)) {
2948 cifs_dbg(VFS, "%s: reparse buffer is too small. Must be at least 8 bytes but was %d\n",
2949 __func__, plen);
2950 return -EIO;
2951 }
2952
2953 if (plen < le16_to_cpu(buf->ReparseDataLength) + sizeof(*buf)) {
2954 cifs_dbg(VFS, "%s: invalid reparse buf length: %d\n",
2955 __func__, plen);
2956 return -EIO;
2957 }
2958
2959 data->reparse.buf = buf;
2960
2961 /* See MS-FSCC 2.1.2 */
2962 switch (le32_to_cpu(buf->ReparseTag)) {
2963 case IO_REPARSE_TAG_NFS:
2964 return parse_reparse_posix((struct reparse_posix_data *)buf,
2965 cifs_sb, data);
2966 case IO_REPARSE_TAG_SYMLINK:
2967 return parse_reparse_symlink(
2968 (struct reparse_symlink_data_buffer *)buf,
2969 plen, unicode, cifs_sb, data);
2970 case IO_REPARSE_TAG_LX_SYMLINK:
2971 case IO_REPARSE_TAG_AF_UNIX:
2972 case IO_REPARSE_TAG_LX_FIFO:
2973 case IO_REPARSE_TAG_LX_CHR:
2974 case IO_REPARSE_TAG_LX_BLK:
2975 return 0;
2976 default:
2977 cifs_dbg(VFS, "%s: unhandled reparse tag: 0x%08x\n",
2978 __func__, le32_to_cpu(buf->ReparseTag));
2979 return -EOPNOTSUPP;
2980 }
2981 }
2982
smb2_parse_reparse_point(struct cifs_sb_info * cifs_sb,struct kvec * rsp_iov,struct cifs_open_info_data * data)2983 static int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
2984 struct kvec *rsp_iov,
2985 struct cifs_open_info_data *data)
2986 {
2987 struct reparse_data_buffer *buf;
2988 struct smb2_ioctl_rsp *io = rsp_iov->iov_base;
2989 u32 plen = le32_to_cpu(io->OutputCount);
2990
2991 buf = (struct reparse_data_buffer *)((u8 *)io +
2992 le32_to_cpu(io->OutputOffset));
2993 return parse_reparse_point(buf, plen, cifs_sb, true, data);
2994 }
2995
smb2_query_reparse_point(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,u32 * tag,struct kvec * rsp,int * rsp_buftype)2996 static int smb2_query_reparse_point(const unsigned int xid,
2997 struct cifs_tcon *tcon,
2998 struct cifs_sb_info *cifs_sb,
2999 const char *full_path,
3000 u32 *tag, struct kvec *rsp,
3001 int *rsp_buftype)
3002 {
3003 struct smb2_compound_vars *vars;
3004 int rc;
3005 __le16 *utf16_path = NULL;
3006 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3007 struct cifs_open_parms oparms;
3008 struct cifs_fid fid;
3009 struct TCP_Server_Info *server = cifs_pick_channel(tcon->ses);
3010 int flags = CIFS_CP_CREATE_CLOSE_OP;
3011 struct smb_rqst *rqst;
3012 int resp_buftype[3];
3013 struct kvec *rsp_iov;
3014 struct smb2_ioctl_rsp *ioctl_rsp;
3015 struct reparse_data_buffer *reparse_buf;
3016 u32 off, count, len;
3017
3018 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
3019
3020 if (smb3_encryption_required(tcon))
3021 flags |= CIFS_TRANSFORM_REQ;
3022
3023 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
3024 if (!utf16_path)
3025 return -ENOMEM;
3026
3027 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
3028 vars = kzalloc(sizeof(*vars), GFP_KERNEL);
3029 if (!vars) {
3030 rc = -ENOMEM;
3031 goto out_free_path;
3032 }
3033 rqst = vars->rqst;
3034 rsp_iov = vars->rsp_iov;
3035
3036 /*
3037 * setup smb2open - TODO add optimization to call cifs_get_readable_path
3038 * to see if there is a handle already open that we can use
3039 */
3040 rqst[0].rq_iov = vars->open_iov;
3041 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
3042
3043 oparms = (struct cifs_open_parms) {
3044 .tcon = tcon,
3045 .path = full_path,
3046 .desired_access = FILE_READ_ATTRIBUTES,
3047 .disposition = FILE_OPEN,
3048 .create_options = cifs_create_options(cifs_sb, OPEN_REPARSE_POINT),
3049 .fid = &fid,
3050 };
3051
3052 rc = SMB2_open_init(tcon, server,
3053 &rqst[0], &oplock, &oparms, utf16_path);
3054 if (rc)
3055 goto query_rp_exit;
3056 smb2_set_next_command(tcon, &rqst[0]);
3057
3058
3059 /* IOCTL */
3060 rqst[1].rq_iov = vars->io_iov;
3061 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
3062
3063 rc = SMB2_ioctl_init(tcon, server,
3064 &rqst[1], COMPOUND_FID,
3065 COMPOUND_FID, FSCTL_GET_REPARSE_POINT, NULL, 0,
3066 CIFSMaxBufSize -
3067 MAX_SMB2_CREATE_RESPONSE_SIZE -
3068 MAX_SMB2_CLOSE_RESPONSE_SIZE);
3069 if (rc)
3070 goto query_rp_exit;
3071
3072 smb2_set_next_command(tcon, &rqst[1]);
3073 smb2_set_related(&rqst[1]);
3074
3075 /* Close */
3076 rqst[2].rq_iov = &vars->close_iov;
3077 rqst[2].rq_nvec = 1;
3078
3079 rc = SMB2_close_init(tcon, server,
3080 &rqst[2], COMPOUND_FID, COMPOUND_FID, false);
3081 if (rc)
3082 goto query_rp_exit;
3083
3084 smb2_set_related(&rqst[2]);
3085
3086 rc = compound_send_recv(xid, tcon->ses, server,
3087 flags, 3, rqst,
3088 resp_buftype, rsp_iov);
3089
3090 ioctl_rsp = rsp_iov[1].iov_base;
3091
3092 /*
3093 * Open was successful and we got an ioctl response.
3094 */
3095 if (rc == 0) {
3096 /* See MS-FSCC 2.3.23 */
3097 off = le32_to_cpu(ioctl_rsp->OutputOffset);
3098 count = le32_to_cpu(ioctl_rsp->OutputCount);
3099 if (check_add_overflow(off, count, &len) ||
3100 len > rsp_iov[1].iov_len) {
3101 cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3102 __func__, off, count);
3103 rc = -EIO;
3104 goto query_rp_exit;
3105 }
3106
3107 reparse_buf = (void *)((u8 *)ioctl_rsp + off);
3108 len = sizeof(*reparse_buf);
3109 if (count < len ||
3110 count < le16_to_cpu(reparse_buf->ReparseDataLength) + len) {
3111 cifs_tcon_dbg(VFS, "%s: invalid ioctl: off=%d count=%d\n",
3112 __func__, off, count);
3113 rc = -EIO;
3114 goto query_rp_exit;
3115 }
3116 *tag = le32_to_cpu(reparse_buf->ReparseTag);
3117 *rsp = rsp_iov[1];
3118 *rsp_buftype = resp_buftype[1];
3119 resp_buftype[1] = CIFS_NO_BUFFER;
3120 }
3121
3122 query_rp_exit:
3123 SMB2_open_free(&rqst[0]);
3124 SMB2_ioctl_free(&rqst[1]);
3125 SMB2_close_free(&rqst[2]);
3126 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
3127 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
3128 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
3129 kfree(vars);
3130 out_free_path:
3131 kfree(utf16_path);
3132 return rc;
3133 }
3134
3135 static struct cifs_ntsd *
get_smb2_acl_by_fid(struct cifs_sb_info * cifs_sb,const struct cifs_fid * cifsfid,u32 * pacllen,u32 info)3136 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
3137 const struct cifs_fid *cifsfid, u32 *pacllen, u32 info)
3138 {
3139 struct cifs_ntsd *pntsd = NULL;
3140 unsigned int xid;
3141 int rc = -EOPNOTSUPP;
3142 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3143
3144 if (IS_ERR(tlink))
3145 return ERR_CAST(tlink);
3146
3147 xid = get_xid();
3148 cifs_dbg(FYI, "trying to get acl\n");
3149
3150 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
3151 cifsfid->volatile_fid, (void **)&pntsd, pacllen,
3152 info);
3153 free_xid(xid);
3154
3155 cifs_put_tlink(tlink);
3156
3157 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3158 if (rc)
3159 return ERR_PTR(rc);
3160 return pntsd;
3161
3162 }
3163
3164 static struct cifs_ntsd *
get_smb2_acl_by_path(struct cifs_sb_info * cifs_sb,const char * path,u32 * pacllen,u32 info)3165 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
3166 const char *path, u32 *pacllen, u32 info)
3167 {
3168 struct cifs_ntsd *pntsd = NULL;
3169 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3170 unsigned int xid;
3171 int rc;
3172 struct cifs_tcon *tcon;
3173 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3174 struct cifs_fid fid;
3175 struct cifs_open_parms oparms;
3176 __le16 *utf16_path;
3177
3178 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
3179 if (IS_ERR(tlink))
3180 return ERR_CAST(tlink);
3181
3182 tcon = tlink_tcon(tlink);
3183 xid = get_xid();
3184
3185 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3186 if (!utf16_path) {
3187 rc = -ENOMEM;
3188 free_xid(xid);
3189 return ERR_PTR(rc);
3190 }
3191
3192 oparms = (struct cifs_open_parms) {
3193 .tcon = tcon,
3194 .path = path,
3195 .desired_access = READ_CONTROL,
3196 .disposition = FILE_OPEN,
3197 /*
3198 * When querying an ACL, even if the file is a symlink
3199 * we want to open the source not the target, and so
3200 * the protocol requires that the client specify this
3201 * flag when opening a reparse point
3202 */
3203 .create_options = cifs_create_options(cifs_sb, 0) |
3204 OPEN_REPARSE_POINT,
3205 .fid = &fid,
3206 };
3207
3208 if (info & SACL_SECINFO)
3209 oparms.desired_access |= SYSTEM_SECURITY;
3210
3211 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL,
3212 NULL);
3213 kfree(utf16_path);
3214 if (!rc) {
3215 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3216 fid.volatile_fid, (void **)&pntsd, pacllen,
3217 info);
3218 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3219 }
3220
3221 cifs_put_tlink(tlink);
3222 free_xid(xid);
3223
3224 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
3225 if (rc)
3226 return ERR_PTR(rc);
3227 return pntsd;
3228 }
3229
3230 static int
set_smb2_acl(struct cifs_ntsd * pnntsd,__u32 acllen,struct inode * inode,const char * path,int aclflag)3231 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
3232 struct inode *inode, const char *path, int aclflag)
3233 {
3234 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
3235 unsigned int xid;
3236 int rc, access_flags = 0;
3237 struct cifs_tcon *tcon;
3238 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
3239 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
3240 struct cifs_fid fid;
3241 struct cifs_open_parms oparms;
3242 __le16 *utf16_path;
3243
3244 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
3245 if (IS_ERR(tlink))
3246 return PTR_ERR(tlink);
3247
3248 tcon = tlink_tcon(tlink);
3249 xid = get_xid();
3250
3251 if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP)
3252 access_flags |= WRITE_OWNER;
3253 if (aclflag & CIFS_ACL_SACL)
3254 access_flags |= SYSTEM_SECURITY;
3255 if (aclflag & CIFS_ACL_DACL)
3256 access_flags |= WRITE_DAC;
3257
3258 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
3259 if (!utf16_path) {
3260 rc = -ENOMEM;
3261 free_xid(xid);
3262 return rc;
3263 }
3264
3265 oparms = (struct cifs_open_parms) {
3266 .tcon = tcon,
3267 .desired_access = access_flags,
3268 .create_options = cifs_create_options(cifs_sb, 0),
3269 .disposition = FILE_OPEN,
3270 .path = path,
3271 .fid = &fid,
3272 };
3273
3274 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
3275 NULL, NULL);
3276 kfree(utf16_path);
3277 if (!rc) {
3278 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
3279 fid.volatile_fid, pnntsd, acllen, aclflag);
3280 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
3281 }
3282
3283 cifs_put_tlink(tlink);
3284 free_xid(xid);
3285 return rc;
3286 }
3287
3288 /* Retrieve an ACL from the server */
3289 static struct cifs_ntsd *
get_smb2_acl(struct cifs_sb_info * cifs_sb,struct inode * inode,const char * path,u32 * pacllen,u32 info)3290 get_smb2_acl(struct cifs_sb_info *cifs_sb,
3291 struct inode *inode, const char *path,
3292 u32 *pacllen, u32 info)
3293 {
3294 struct cifs_ntsd *pntsd = NULL;
3295 struct cifsFileInfo *open_file = NULL;
3296
3297 if (inode && !(info & SACL_SECINFO))
3298 open_file = find_readable_file(CIFS_I(inode), true);
3299 if (!open_file || (info & SACL_SECINFO))
3300 return get_smb2_acl_by_path(cifs_sb, path, pacllen, info);
3301
3302 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info);
3303 cifsFileInfo_put(open_file);
3304 return pntsd;
3305 }
3306
smb3_zero_data(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len,unsigned int xid)3307 static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon,
3308 loff_t offset, loff_t len, unsigned int xid)
3309 {
3310 struct cifsFileInfo *cfile = file->private_data;
3311 struct file_zero_data_information fsctl_buf;
3312
3313 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3314
3315 fsctl_buf.FileOffset = cpu_to_le64(offset);
3316 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3317
3318 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3319 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3320 (char *)&fsctl_buf,
3321 sizeof(struct file_zero_data_information),
3322 0, NULL, NULL);
3323 }
3324
smb3_zero_range(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len,bool keep_size)3325 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
3326 loff_t offset, loff_t len, bool keep_size)
3327 {
3328 struct cifs_ses *ses = tcon->ses;
3329 struct inode *inode = file_inode(file);
3330 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3331 struct cifsFileInfo *cfile = file->private_data;
3332 unsigned long long new_size;
3333 long rc;
3334 unsigned int xid;
3335 __le64 eof;
3336
3337 xid = get_xid();
3338
3339 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3340 ses->Suid, offset, len);
3341
3342 inode_lock(inode);
3343 filemap_invalidate_lock(inode->i_mapping);
3344
3345 /*
3346 * We zero the range through ioctl, so we need remove the page caches
3347 * first, otherwise the data may be inconsistent with the server.
3348 */
3349 truncate_pagecache_range(inode, offset, offset + len - 1);
3350
3351 /* if file not oplocked can't be sure whether asking to extend size */
3352 rc = -EOPNOTSUPP;
3353 if (keep_size == false && !CIFS_CACHE_READ(cifsi))
3354 goto zero_range_exit;
3355
3356 rc = smb3_zero_data(file, tcon, offset, len, xid);
3357 if (rc < 0)
3358 goto zero_range_exit;
3359
3360 /*
3361 * do we also need to change the size of the file?
3362 */
3363 new_size = offset + len;
3364 if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) {
3365 eof = cpu_to_le64(new_size);
3366 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3367 cfile->fid.volatile_fid, cfile->pid, &eof);
3368 if (rc >= 0) {
3369 truncate_setsize(inode, new_size);
3370 fscache_resize_cookie(cifs_inode_cookie(inode), new_size);
3371 }
3372 }
3373
3374 zero_range_exit:
3375 filemap_invalidate_unlock(inode->i_mapping);
3376 inode_unlock(inode);
3377 free_xid(xid);
3378 if (rc)
3379 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
3380 ses->Suid, offset, len, rc);
3381 else
3382 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
3383 ses->Suid, offset, len);
3384 return rc;
3385 }
3386
smb3_punch_hole(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len)3387 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
3388 loff_t offset, loff_t len)
3389 {
3390 struct inode *inode = file_inode(file);
3391 struct cifsFileInfo *cfile = file->private_data;
3392 struct file_zero_data_information fsctl_buf;
3393 long rc;
3394 unsigned int xid;
3395 __u8 set_sparse = 1;
3396
3397 xid = get_xid();
3398
3399 inode_lock(inode);
3400 /* Need to make file sparse, if not already, before freeing range. */
3401 /* Consider adding equivalent for compressed since it could also work */
3402 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
3403 rc = -EOPNOTSUPP;
3404 goto out;
3405 }
3406
3407 filemap_invalidate_lock(inode->i_mapping);
3408 /*
3409 * We implement the punch hole through ioctl, so we need remove the page
3410 * caches first, otherwise the data may be inconsistent with the server.
3411 */
3412 truncate_pagecache_range(inode, offset, offset + len - 1);
3413
3414 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
3415
3416 fsctl_buf.FileOffset = cpu_to_le64(offset);
3417 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
3418
3419 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3420 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
3421 (char *)&fsctl_buf,
3422 sizeof(struct file_zero_data_information),
3423 CIFSMaxBufSize, NULL, NULL);
3424 filemap_invalidate_unlock(inode->i_mapping);
3425 out:
3426 inode_unlock(inode);
3427 free_xid(xid);
3428 return rc;
3429 }
3430
smb3_simple_fallocate_write_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len,char * buf)3431 static int smb3_simple_fallocate_write_range(unsigned int xid,
3432 struct cifs_tcon *tcon,
3433 struct cifsFileInfo *cfile,
3434 loff_t off, loff_t len,
3435 char *buf)
3436 {
3437 struct cifs_io_parms io_parms = {0};
3438 int nbytes;
3439 int rc = 0;
3440 struct kvec iov[2];
3441
3442 io_parms.netfid = cfile->fid.netfid;
3443 io_parms.pid = current->tgid;
3444 io_parms.tcon = tcon;
3445 io_parms.persistent_fid = cfile->fid.persistent_fid;
3446 io_parms.volatile_fid = cfile->fid.volatile_fid;
3447
3448 while (len) {
3449 io_parms.offset = off;
3450 io_parms.length = len;
3451 if (io_parms.length > SMB2_MAX_BUFFER_SIZE)
3452 io_parms.length = SMB2_MAX_BUFFER_SIZE;
3453 /* iov[0] is reserved for smb header */
3454 iov[1].iov_base = buf;
3455 iov[1].iov_len = io_parms.length;
3456 rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1);
3457 if (rc)
3458 break;
3459 if (nbytes > len)
3460 return -EINVAL;
3461 buf += nbytes;
3462 off += nbytes;
3463 len -= nbytes;
3464 }
3465 return rc;
3466 }
3467
smb3_simple_fallocate_range(unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,loff_t off,loff_t len)3468 static int smb3_simple_fallocate_range(unsigned int xid,
3469 struct cifs_tcon *tcon,
3470 struct cifsFileInfo *cfile,
3471 loff_t off, loff_t len)
3472 {
3473 struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data;
3474 u32 out_data_len;
3475 char *buf = NULL;
3476 loff_t l;
3477 int rc;
3478
3479 in_data.file_offset = cpu_to_le64(off);
3480 in_data.length = cpu_to_le64(len);
3481 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3482 cfile->fid.volatile_fid,
3483 FSCTL_QUERY_ALLOCATED_RANGES,
3484 (char *)&in_data, sizeof(in_data),
3485 1024 * sizeof(struct file_allocated_range_buffer),
3486 (char **)&out_data, &out_data_len);
3487 if (rc)
3488 goto out;
3489
3490 buf = kzalloc(1024 * 1024, GFP_KERNEL);
3491 if (buf == NULL) {
3492 rc = -ENOMEM;
3493 goto out;
3494 }
3495
3496 tmp_data = out_data;
3497 while (len) {
3498 /*
3499 * The rest of the region is unmapped so write it all.
3500 */
3501 if (out_data_len == 0) {
3502 rc = smb3_simple_fallocate_write_range(xid, tcon,
3503 cfile, off, len, buf);
3504 goto out;
3505 }
3506
3507 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3508 rc = -EINVAL;
3509 goto out;
3510 }
3511
3512 if (off < le64_to_cpu(tmp_data->file_offset)) {
3513 /*
3514 * We are at a hole. Write until the end of the region
3515 * or until the next allocated data,
3516 * whichever comes next.
3517 */
3518 l = le64_to_cpu(tmp_data->file_offset) - off;
3519 if (len < l)
3520 l = len;
3521 rc = smb3_simple_fallocate_write_range(xid, tcon,
3522 cfile, off, l, buf);
3523 if (rc)
3524 goto out;
3525 off = off + l;
3526 len = len - l;
3527 if (len == 0)
3528 goto out;
3529 }
3530 /*
3531 * We are at a section of allocated data, just skip forward
3532 * until the end of the data or the end of the region
3533 * we are supposed to fallocate, whichever comes first.
3534 */
3535 l = le64_to_cpu(tmp_data->length);
3536 if (len < l)
3537 l = len;
3538 off += l;
3539 len -= l;
3540
3541 tmp_data = &tmp_data[1];
3542 out_data_len -= sizeof(struct file_allocated_range_buffer);
3543 }
3544
3545 out:
3546 kfree(out_data);
3547 kfree(buf);
3548 return rc;
3549 }
3550
3551
smb3_simple_falloc(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len,bool keep_size)3552 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
3553 loff_t off, loff_t len, bool keep_size)
3554 {
3555 struct inode *inode;
3556 struct cifsInodeInfo *cifsi;
3557 struct cifsFileInfo *cfile = file->private_data;
3558 long rc = -EOPNOTSUPP;
3559 unsigned int xid;
3560 __le64 eof;
3561
3562 xid = get_xid();
3563
3564 inode = d_inode(cfile->dentry);
3565 cifsi = CIFS_I(inode);
3566
3567 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
3568 tcon->ses->Suid, off, len);
3569 /* if file not oplocked can't be sure whether asking to extend size */
3570 if (!CIFS_CACHE_READ(cifsi))
3571 if (keep_size == false) {
3572 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3573 tcon->tid, tcon->ses->Suid, off, len, rc);
3574 free_xid(xid);
3575 return rc;
3576 }
3577
3578 /*
3579 * Extending the file
3580 */
3581 if ((keep_size == false) && i_size_read(inode) < off + len) {
3582 rc = inode_newsize_ok(inode, off + len);
3583 if (rc)
3584 goto out;
3585
3586 if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)
3587 smb2_set_sparse(xid, tcon, cfile, inode, false);
3588
3589 eof = cpu_to_le64(off + len);
3590 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3591 cfile->fid.volatile_fid, cfile->pid, &eof);
3592 if (rc == 0) {
3593 cifsi->server_eof = off + len;
3594 cifs_setsize(inode, off + len);
3595 cifs_truncate_page(inode->i_mapping, inode->i_size);
3596 truncate_setsize(inode, off + len);
3597 }
3598 goto out;
3599 }
3600
3601 /*
3602 * Files are non-sparse by default so falloc may be a no-op
3603 * Must check if file sparse. If not sparse, and since we are not
3604 * extending then no need to do anything since file already allocated
3605 */
3606 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3607 rc = 0;
3608 goto out;
3609 }
3610
3611 if (keep_size == true) {
3612 /*
3613 * We can not preallocate pages beyond the end of the file
3614 * in SMB2
3615 */
3616 if (off >= i_size_read(inode)) {
3617 rc = 0;
3618 goto out;
3619 }
3620 /*
3621 * For fallocates that are partially beyond the end of file,
3622 * clamp len so we only fallocate up to the end of file.
3623 */
3624 if (off + len > i_size_read(inode)) {
3625 len = i_size_read(inode) - off;
3626 }
3627 }
3628
3629 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3630 /*
3631 * At this point, we are trying to fallocate an internal
3632 * regions of a sparse file. Since smb2 does not have a
3633 * fallocate command we have two otions on how to emulate this.
3634 * We can either turn the entire file to become non-sparse
3635 * which we only do if the fallocate is for virtually
3636 * the whole file, or we can overwrite the region with zeroes
3637 * using SMB2_write, which could be prohibitevly expensive
3638 * if len is large.
3639 */
3640 /*
3641 * We are only trying to fallocate a small region so
3642 * just write it with zero.
3643 */
3644 if (len <= 1024 * 1024) {
3645 rc = smb3_simple_fallocate_range(xid, tcon, cfile,
3646 off, len);
3647 goto out;
3648 }
3649
3650 /*
3651 * Check if falloc starts within first few pages of file
3652 * and ends within a few pages of the end of file to
3653 * ensure that most of file is being forced to be
3654 * fallocated now. If so then setting whole file sparse
3655 * ie potentially making a few extra pages at the beginning
3656 * or end of the file non-sparse via set_sparse is harmless.
3657 */
3658 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3659 rc = -EOPNOTSUPP;
3660 goto out;
3661 }
3662 }
3663
3664 smb2_set_sparse(xid, tcon, cfile, inode, false);
3665 rc = 0;
3666
3667 out:
3668 if (rc)
3669 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3670 tcon->ses->Suid, off, len, rc);
3671 else
3672 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3673 tcon->ses->Suid, off, len);
3674
3675 free_xid(xid);
3676 return rc;
3677 }
3678
smb3_collapse_range(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len)3679 static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon,
3680 loff_t off, loff_t len)
3681 {
3682 int rc;
3683 unsigned int xid;
3684 struct inode *inode = file_inode(file);
3685 struct cifsFileInfo *cfile = file->private_data;
3686 struct cifsInodeInfo *cifsi = CIFS_I(inode);
3687 __le64 eof;
3688 loff_t old_eof;
3689
3690 xid = get_xid();
3691
3692 inode_lock(inode);
3693
3694 old_eof = i_size_read(inode);
3695 if ((off >= old_eof) ||
3696 off + len >= old_eof) {
3697 rc = -EINVAL;
3698 goto out;
3699 }
3700
3701 filemap_invalidate_lock(inode->i_mapping);
3702 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1);
3703 if (rc < 0)
3704 goto out_2;
3705
3706 truncate_pagecache_range(inode, off, old_eof);
3707
3708 rc = smb2_copychunk_range(xid, cfile, cfile, off + len,
3709 old_eof - off - len, off);
3710 if (rc < 0)
3711 goto out_2;
3712
3713 eof = cpu_to_le64(old_eof - len);
3714 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3715 cfile->fid.volatile_fid, cfile->pid, &eof);
3716 if (rc < 0)
3717 goto out_2;
3718
3719 rc = 0;
3720
3721 cifsi->server_eof = i_size_read(inode) - len;
3722 truncate_setsize(inode, cifsi->server_eof);
3723 fscache_resize_cookie(cifs_inode_cookie(inode), cifsi->server_eof);
3724 out_2:
3725 filemap_invalidate_unlock(inode->i_mapping);
3726 out:
3727 inode_unlock(inode);
3728 free_xid(xid);
3729 return rc;
3730 }
3731
smb3_insert_range(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len)3732 static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon,
3733 loff_t off, loff_t len)
3734 {
3735 int rc;
3736 unsigned int xid;
3737 struct cifsFileInfo *cfile = file->private_data;
3738 struct inode *inode = file_inode(file);
3739 __le64 eof;
3740 __u64 count, old_eof;
3741
3742 xid = get_xid();
3743
3744 inode_lock(inode);
3745
3746 old_eof = i_size_read(inode);
3747 if (off >= old_eof) {
3748 rc = -EINVAL;
3749 goto out;
3750 }
3751
3752 count = old_eof - off;
3753 eof = cpu_to_le64(old_eof + len);
3754
3755 filemap_invalidate_lock(inode->i_mapping);
3756 rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof + len - 1);
3757 if (rc < 0)
3758 goto out_2;
3759 truncate_pagecache_range(inode, off, old_eof);
3760
3761 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3762 cfile->fid.volatile_fid, cfile->pid, &eof);
3763 if (rc < 0)
3764 goto out_2;
3765
3766 truncate_setsize(inode, old_eof + len);
3767 fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode));
3768
3769 rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len);
3770 if (rc < 0)
3771 goto out_2;
3772
3773 rc = smb3_zero_data(file, tcon, off, len, xid);
3774 if (rc < 0)
3775 goto out_2;
3776
3777 rc = 0;
3778 out_2:
3779 filemap_invalidate_unlock(inode->i_mapping);
3780 out:
3781 inode_unlock(inode);
3782 free_xid(xid);
3783 return rc;
3784 }
3785
smb3_llseek(struct file * file,struct cifs_tcon * tcon,loff_t offset,int whence)3786 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3787 {
3788 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3789 struct cifsInodeInfo *cifsi;
3790 struct inode *inode;
3791 int rc = 0;
3792 struct file_allocated_range_buffer in_data, *out_data = NULL;
3793 u32 out_data_len;
3794 unsigned int xid;
3795
3796 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3797 return generic_file_llseek(file, offset, whence);
3798
3799 inode = d_inode(cfile->dentry);
3800 cifsi = CIFS_I(inode);
3801
3802 if (offset < 0 || offset >= i_size_read(inode))
3803 return -ENXIO;
3804
3805 xid = get_xid();
3806 /*
3807 * We need to be sure that all dirty pages are written as they
3808 * might fill holes on the server.
3809 * Note that we also MUST flush any written pages since at least
3810 * some servers (Windows2016) will not reflect recent writes in
3811 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3812 */
3813 wrcfile = find_writable_file(cifsi, FIND_WR_ANY);
3814 if (wrcfile) {
3815 filemap_write_and_wait(inode->i_mapping);
3816 smb2_flush_file(xid, tcon, &wrcfile->fid);
3817 cifsFileInfo_put(wrcfile);
3818 }
3819
3820 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3821 if (whence == SEEK_HOLE)
3822 offset = i_size_read(inode);
3823 goto lseek_exit;
3824 }
3825
3826 in_data.file_offset = cpu_to_le64(offset);
3827 in_data.length = cpu_to_le64(i_size_read(inode));
3828
3829 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3830 cfile->fid.volatile_fid,
3831 FSCTL_QUERY_ALLOCATED_RANGES,
3832 (char *)&in_data, sizeof(in_data),
3833 sizeof(struct file_allocated_range_buffer),
3834 (char **)&out_data, &out_data_len);
3835 if (rc == -E2BIG)
3836 rc = 0;
3837 if (rc)
3838 goto lseek_exit;
3839
3840 if (whence == SEEK_HOLE && out_data_len == 0)
3841 goto lseek_exit;
3842
3843 if (whence == SEEK_DATA && out_data_len == 0) {
3844 rc = -ENXIO;
3845 goto lseek_exit;
3846 }
3847
3848 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3849 rc = -EINVAL;
3850 goto lseek_exit;
3851 }
3852 if (whence == SEEK_DATA) {
3853 offset = le64_to_cpu(out_data->file_offset);
3854 goto lseek_exit;
3855 }
3856 if (offset < le64_to_cpu(out_data->file_offset))
3857 goto lseek_exit;
3858
3859 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3860
3861 lseek_exit:
3862 free_xid(xid);
3863 kfree(out_data);
3864 if (!rc)
3865 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3866 else
3867 return rc;
3868 }
3869
smb3_fiemap(struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct fiemap_extent_info * fei,u64 start,u64 len)3870 static int smb3_fiemap(struct cifs_tcon *tcon,
3871 struct cifsFileInfo *cfile,
3872 struct fiemap_extent_info *fei, u64 start, u64 len)
3873 {
3874 unsigned int xid;
3875 struct file_allocated_range_buffer in_data, *out_data;
3876 u32 out_data_len;
3877 int i, num, rc, flags, last_blob;
3878 u64 next;
3879
3880 rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
3881 if (rc)
3882 return rc;
3883
3884 xid = get_xid();
3885 again:
3886 in_data.file_offset = cpu_to_le64(start);
3887 in_data.length = cpu_to_le64(len);
3888
3889 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3890 cfile->fid.volatile_fid,
3891 FSCTL_QUERY_ALLOCATED_RANGES,
3892 (char *)&in_data, sizeof(in_data),
3893 1024 * sizeof(struct file_allocated_range_buffer),
3894 (char **)&out_data, &out_data_len);
3895 if (rc == -E2BIG) {
3896 last_blob = 0;
3897 rc = 0;
3898 } else
3899 last_blob = 1;
3900 if (rc)
3901 goto out;
3902
3903 if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) {
3904 rc = -EINVAL;
3905 goto out;
3906 }
3907 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3908 rc = -EINVAL;
3909 goto out;
3910 }
3911
3912 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3913 for (i = 0; i < num; i++) {
3914 flags = 0;
3915 if (i == num - 1 && last_blob)
3916 flags |= FIEMAP_EXTENT_LAST;
3917
3918 rc = fiemap_fill_next_extent(fei,
3919 le64_to_cpu(out_data[i].file_offset),
3920 le64_to_cpu(out_data[i].file_offset),
3921 le64_to_cpu(out_data[i].length),
3922 flags);
3923 if (rc < 0)
3924 goto out;
3925 if (rc == 1) {
3926 rc = 0;
3927 goto out;
3928 }
3929 }
3930
3931 if (!last_blob) {
3932 next = le64_to_cpu(out_data[num - 1].file_offset) +
3933 le64_to_cpu(out_data[num - 1].length);
3934 len = len - (next - start);
3935 start = next;
3936 goto again;
3937 }
3938
3939 out:
3940 free_xid(xid);
3941 kfree(out_data);
3942 return rc;
3943 }
3944
smb3_fallocate(struct file * file,struct cifs_tcon * tcon,int mode,loff_t off,loff_t len)3945 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3946 loff_t off, loff_t len)
3947 {
3948 /* KEEP_SIZE already checked for by do_fallocate */
3949 if (mode & FALLOC_FL_PUNCH_HOLE)
3950 return smb3_punch_hole(file, tcon, off, len);
3951 else if (mode & FALLOC_FL_ZERO_RANGE) {
3952 if (mode & FALLOC_FL_KEEP_SIZE)
3953 return smb3_zero_range(file, tcon, off, len, true);
3954 return smb3_zero_range(file, tcon, off, len, false);
3955 } else if (mode == FALLOC_FL_KEEP_SIZE)
3956 return smb3_simple_falloc(file, tcon, off, len, true);
3957 else if (mode == FALLOC_FL_COLLAPSE_RANGE)
3958 return smb3_collapse_range(file, tcon, off, len);
3959 else if (mode == FALLOC_FL_INSERT_RANGE)
3960 return smb3_insert_range(file, tcon, off, len);
3961 else if (mode == 0)
3962 return smb3_simple_falloc(file, tcon, off, len, false);
3963
3964 return -EOPNOTSUPP;
3965 }
3966
3967 static void
smb2_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3968 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3969 struct cifsInodeInfo *cinode, __u32 oplock,
3970 unsigned int epoch, bool *purge_cache)
3971 {
3972 server->ops->set_oplock_level(cinode, oplock, 0, NULL);
3973 }
3974
3975 static void
3976 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3977 unsigned int epoch, bool *purge_cache);
3978
3979 static void
smb3_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)3980 smb3_downgrade_oplock(struct TCP_Server_Info *server,
3981 struct cifsInodeInfo *cinode, __u32 oplock,
3982 unsigned int epoch, bool *purge_cache)
3983 {
3984 unsigned int old_state = cinode->oplock;
3985 unsigned int old_epoch = cinode->epoch;
3986 unsigned int new_state;
3987
3988 if (epoch > old_epoch) {
3989 smb21_set_oplock_level(cinode, oplock, 0, NULL);
3990 cinode->epoch = epoch;
3991 }
3992
3993 new_state = cinode->oplock;
3994 *purge_cache = false;
3995
3996 if ((old_state & CIFS_CACHE_READ_FLG) != 0 &&
3997 (new_state & CIFS_CACHE_READ_FLG) == 0)
3998 *purge_cache = true;
3999 else if (old_state == new_state && (epoch - old_epoch > 1))
4000 *purge_cache = true;
4001 }
4002
4003 static void
smb2_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)4004 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4005 unsigned int epoch, bool *purge_cache)
4006 {
4007 oplock &= 0xFF;
4008 cinode->lease_granted = false;
4009 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4010 return;
4011 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
4012 cinode->oplock = CIFS_CACHE_RHW_FLG;
4013 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
4014 &cinode->netfs.inode);
4015 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
4016 cinode->oplock = CIFS_CACHE_RW_FLG;
4017 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
4018 &cinode->netfs.inode);
4019 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
4020 cinode->oplock = CIFS_CACHE_READ_FLG;
4021 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
4022 &cinode->netfs.inode);
4023 } else
4024 cinode->oplock = 0;
4025 }
4026
4027 static void
smb21_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)4028 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4029 unsigned int epoch, bool *purge_cache)
4030 {
4031 char message[5] = {0};
4032 unsigned int new_oplock = 0;
4033
4034 oplock &= 0xFF;
4035 cinode->lease_granted = true;
4036 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
4037 return;
4038
4039 /* Check if the server granted an oplock rather than a lease */
4040 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4041 return smb2_set_oplock_level(cinode, oplock, epoch,
4042 purge_cache);
4043
4044 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
4045 new_oplock |= CIFS_CACHE_READ_FLG;
4046 strcat(message, "R");
4047 }
4048 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
4049 new_oplock |= CIFS_CACHE_HANDLE_FLG;
4050 strcat(message, "H");
4051 }
4052 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
4053 new_oplock |= CIFS_CACHE_WRITE_FLG;
4054 strcat(message, "W");
4055 }
4056 if (!new_oplock)
4057 strncpy(message, "None", sizeof(message));
4058
4059 cinode->oplock = new_oplock;
4060 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
4061 &cinode->netfs.inode);
4062 }
4063
4064 static void
smb3_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)4065 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
4066 unsigned int epoch, bool *purge_cache)
4067 {
4068 unsigned int old_oplock = cinode->oplock;
4069
4070 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
4071
4072 if (purge_cache) {
4073 *purge_cache = false;
4074 if (old_oplock == CIFS_CACHE_READ_FLG) {
4075 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
4076 (epoch - cinode->epoch > 0))
4077 *purge_cache = true;
4078 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4079 (epoch - cinode->epoch > 1))
4080 *purge_cache = true;
4081 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4082 (epoch - cinode->epoch > 1))
4083 *purge_cache = true;
4084 else if (cinode->oplock == 0 &&
4085 (epoch - cinode->epoch > 0))
4086 *purge_cache = true;
4087 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
4088 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
4089 (epoch - cinode->epoch > 0))
4090 *purge_cache = true;
4091 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
4092 (epoch - cinode->epoch > 1))
4093 *purge_cache = true;
4094 }
4095 cinode->epoch = epoch;
4096 }
4097 }
4098
4099 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
4100 static bool
smb2_is_read_op(__u32 oplock)4101 smb2_is_read_op(__u32 oplock)
4102 {
4103 return oplock == SMB2_OPLOCK_LEVEL_II;
4104 }
4105 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
4106
4107 static bool
smb21_is_read_op(__u32 oplock)4108 smb21_is_read_op(__u32 oplock)
4109 {
4110 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
4111 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
4112 }
4113
4114 static __le32
map_oplock_to_lease(u8 oplock)4115 map_oplock_to_lease(u8 oplock)
4116 {
4117 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
4118 return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE;
4119 else if (oplock == SMB2_OPLOCK_LEVEL_II)
4120 return SMB2_LEASE_READ_CACHING_LE;
4121 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
4122 return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE |
4123 SMB2_LEASE_WRITE_CACHING_LE;
4124 return 0;
4125 }
4126
4127 static char *
smb2_create_lease_buf(u8 * lease_key,u8 oplock)4128 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
4129 {
4130 struct create_lease *buf;
4131
4132 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
4133 if (!buf)
4134 return NULL;
4135
4136 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4137 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4138
4139 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4140 (struct create_lease, lcontext));
4141 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
4142 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4143 (struct create_lease, Name));
4144 buf->ccontext.NameLength = cpu_to_le16(4);
4145 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4146 buf->Name[0] = 'R';
4147 buf->Name[1] = 'q';
4148 buf->Name[2] = 'L';
4149 buf->Name[3] = 's';
4150 return (char *)buf;
4151 }
4152
4153 static char *
smb3_create_lease_buf(u8 * lease_key,u8 oplock)4154 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
4155 {
4156 struct create_lease_v2 *buf;
4157
4158 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
4159 if (!buf)
4160 return NULL;
4161
4162 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
4163 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
4164
4165 buf->ccontext.DataOffset = cpu_to_le16(offsetof
4166 (struct create_lease_v2, lcontext));
4167 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
4168 buf->ccontext.NameOffset = cpu_to_le16(offsetof
4169 (struct create_lease_v2, Name));
4170 buf->ccontext.NameLength = cpu_to_le16(4);
4171 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
4172 buf->Name[0] = 'R';
4173 buf->Name[1] = 'q';
4174 buf->Name[2] = 'L';
4175 buf->Name[3] = 's';
4176 return (char *)buf;
4177 }
4178
4179 static __u8
smb2_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4180 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4181 {
4182 struct create_lease *lc = (struct create_lease *)buf;
4183
4184 *epoch = 0; /* not used */
4185 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4186 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4187 return le32_to_cpu(lc->lcontext.LeaseState);
4188 }
4189
4190 static __u8
smb3_parse_lease_buf(void * buf,unsigned int * epoch,char * lease_key)4191 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
4192 {
4193 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
4194
4195 *epoch = le16_to_cpu(lc->lcontext.Epoch);
4196 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE)
4197 return SMB2_OPLOCK_LEVEL_NOCHANGE;
4198 if (lease_key)
4199 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
4200 return le32_to_cpu(lc->lcontext.LeaseState);
4201 }
4202
4203 static unsigned int
smb2_wp_retry_size(struct inode * inode)4204 smb2_wp_retry_size(struct inode *inode)
4205 {
4206 return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize,
4207 SMB2_MAX_BUFFER_SIZE);
4208 }
4209
4210 static bool
smb2_dir_needs_close(struct cifsFileInfo * cfile)4211 smb2_dir_needs_close(struct cifsFileInfo *cfile)
4212 {
4213 return !cfile->invalidHandle;
4214 }
4215
4216 static void
fill_transform_hdr(struct smb2_transform_hdr * tr_hdr,unsigned int orig_len,struct smb_rqst * old_rq,__le16 cipher_type)4217 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
4218 struct smb_rqst *old_rq, __le16 cipher_type)
4219 {
4220 struct smb2_hdr *shdr =
4221 (struct smb2_hdr *)old_rq->rq_iov[0].iov_base;
4222
4223 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
4224 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
4225 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
4226 tr_hdr->Flags = cpu_to_le16(0x01);
4227 if ((cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4228 (cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4229 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4230 else
4231 get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4232 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
4233 }
4234
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 sg_table * sgt,unsigned int * num_sgs,size_t * sensitive_size)4235 static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst,
4236 int num_rqst, const u8 *sig, u8 **iv,
4237 struct aead_request **req, struct sg_table *sgt,
4238 unsigned int *num_sgs, size_t *sensitive_size)
4239 {
4240 unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm);
4241 unsigned int iv_size = crypto_aead_ivsize(tfm);
4242 unsigned int len;
4243 u8 *p;
4244
4245 *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig);
4246 if (IS_ERR_VALUE((long)(int)*num_sgs))
4247 return ERR_PTR(*num_sgs);
4248
4249 len = iv_size;
4250 len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1);
4251 len = ALIGN(len, crypto_tfm_ctx_alignment());
4252 len += req_size;
4253 len = ALIGN(len, __alignof__(struct scatterlist));
4254 len += array_size(*num_sgs, sizeof(struct scatterlist));
4255 *sensitive_size = len;
4256
4257 p = kvzalloc(len, GFP_NOFS);
4258 if (!p)
4259 return ERR_PTR(-ENOMEM);
4260
4261 *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1);
4262 *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size,
4263 crypto_tfm_ctx_alignment());
4264 sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size,
4265 __alignof__(struct scatterlist));
4266 return p;
4267 }
4268
smb2_get_aead_req(struct crypto_aead * tfm,struct smb_rqst * rqst,int num_rqst,const u8 * sig,u8 ** iv,struct aead_request ** req,struct scatterlist ** sgl,size_t * sensitive_size)4269 static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst,
4270 int num_rqst, const u8 *sig, u8 **iv,
4271 struct aead_request **req, struct scatterlist **sgl,
4272 size_t *sensitive_size)
4273 {
4274 struct sg_table sgtable = {};
4275 unsigned int skip, num_sgs, i, j;
4276 ssize_t rc;
4277 void *p;
4278
4279 p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable,
4280 &num_sgs, sensitive_size);
4281 if (IS_ERR(p))
4282 return ERR_CAST(p);
4283
4284 sg_init_marker(sgtable.sgl, num_sgs);
4285
4286 /*
4287 * The first rqst has a transform header where the
4288 * first 20 bytes are not part of the encrypted blob.
4289 */
4290 skip = 20;
4291
4292 for (i = 0; i < num_rqst; i++) {
4293 struct iov_iter *iter = &rqst[i].rq_iter;
4294 size_t count = iov_iter_count(iter);
4295
4296 for (j = 0; j < rqst[i].rq_nvec; j++) {
4297 cifs_sg_set_buf(&sgtable,
4298 rqst[i].rq_iov[j].iov_base + skip,
4299 rqst[i].rq_iov[j].iov_len - skip);
4300
4301 /* See the above comment on the 'skip' assignment */
4302 skip = 0;
4303 }
4304 sgtable.orig_nents = sgtable.nents;
4305
4306 rc = extract_iter_to_sg(iter, count, &sgtable,
4307 num_sgs - sgtable.nents, 0);
4308 iov_iter_revert(iter, rc);
4309 sgtable.orig_nents = sgtable.nents;
4310 }
4311
4312 cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE);
4313 sg_mark_end(&sgtable.sgl[sgtable.nents - 1]);
4314 *sgl = sgtable.sgl;
4315 return p;
4316 }
4317
4318 static int
smb2_get_enc_key(struct TCP_Server_Info * server,__u64 ses_id,int enc,u8 * key)4319 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
4320 {
4321 struct TCP_Server_Info *pserver;
4322 struct cifs_ses *ses;
4323 u8 *ses_enc_key;
4324
4325 /* If server is a channel, select the primary channel */
4326 pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
4327
4328 spin_lock(&cifs_tcp_ses_lock);
4329 list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) {
4330 if (ses->Suid == ses_id) {
4331 spin_lock(&ses->ses_lock);
4332 ses_enc_key = enc ? ses->smb3encryptionkey :
4333 ses->smb3decryptionkey;
4334 memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE);
4335 spin_unlock(&ses->ses_lock);
4336 spin_unlock(&cifs_tcp_ses_lock);
4337 return 0;
4338 }
4339 }
4340 spin_unlock(&cifs_tcp_ses_lock);
4341
4342 trace_smb3_ses_not_found(ses_id);
4343
4344 return -EAGAIN;
4345 }
4346 /*
4347 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
4348 * iov[0] - transform header (associate data),
4349 * iov[1-N] - SMB2 header and pages - data to encrypt.
4350 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
4351 * untouched.
4352 */
4353 static int
crypt_message(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * rqst,int enc)4354 crypt_message(struct TCP_Server_Info *server, int num_rqst,
4355 struct smb_rqst *rqst, int enc)
4356 {
4357 struct smb2_transform_hdr *tr_hdr =
4358 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
4359 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
4360 int rc = 0;
4361 struct scatterlist *sg;
4362 u8 sign[SMB2_SIGNATURE_SIZE] = {};
4363 u8 key[SMB3_ENC_DEC_KEY_SIZE];
4364 struct aead_request *req;
4365 u8 *iv;
4366 DECLARE_CRYPTO_WAIT(wait);
4367 struct crypto_aead *tfm;
4368 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4369 void *creq;
4370 size_t sensitive_size;
4371
4372 rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key);
4373 if (rc) {
4374 cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__,
4375 enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId));
4376 return rc;
4377 }
4378
4379 rc = smb3_crypto_aead_allocate(server);
4380 if (rc) {
4381 cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
4382 return rc;
4383 }
4384
4385 tfm = enc ? server->secmech.enc : server->secmech.dec;
4386
4387 if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) ||
4388 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4389 rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE);
4390 else
4391 rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE);
4392
4393 if (rc) {
4394 cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
4395 return rc;
4396 }
4397
4398 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
4399 if (rc) {
4400 cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
4401 return rc;
4402 }
4403
4404 creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg,
4405 &sensitive_size);
4406 if (IS_ERR(creq))
4407 return PTR_ERR(creq);
4408
4409 if (!enc) {
4410 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
4411 crypt_len += SMB2_SIGNATURE_SIZE;
4412 }
4413
4414 if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) ||
4415 (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM))
4416 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
4417 else {
4418 iv[0] = 3;
4419 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
4420 }
4421
4422 aead_request_set_tfm(req, tfm);
4423 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
4424 aead_request_set_ad(req, assoc_data_len);
4425
4426 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
4427 crypto_req_done, &wait);
4428
4429 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
4430 : crypto_aead_decrypt(req), &wait);
4431
4432 if (!rc && enc)
4433 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
4434
4435 kvfree_sensitive(creq, sensitive_size);
4436 return rc;
4437 }
4438
4439 /*
4440 * Clear a read buffer, discarding the folios which have XA_MARK_0 set.
4441 */
cifs_clear_xarray_buffer(struct xarray * buffer)4442 static void cifs_clear_xarray_buffer(struct xarray *buffer)
4443 {
4444 struct folio *folio;
4445
4446 XA_STATE(xas, buffer, 0);
4447
4448 rcu_read_lock();
4449 xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) {
4450 folio_put(folio);
4451 }
4452 rcu_read_unlock();
4453 xa_destroy(buffer);
4454 }
4455
4456 void
smb3_free_compound_rqst(int num_rqst,struct smb_rqst * rqst)4457 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
4458 {
4459 int i;
4460
4461 for (i = 0; i < num_rqst; i++)
4462 if (!xa_empty(&rqst[i].rq_buffer))
4463 cifs_clear_xarray_buffer(&rqst[i].rq_buffer);
4464 }
4465
4466 /*
4467 * This function will initialize new_rq and encrypt the content.
4468 * The first entry, new_rq[0], only contains a single iov which contains
4469 * a smb2_transform_hdr and is pre-allocated by the caller.
4470 * This function then populates new_rq[1+] with the content from olq_rq[0+].
4471 *
4472 * The end result is an array of smb_rqst structures where the first structure
4473 * only contains a single iov for the transform header which we then can pass
4474 * to crypt_message().
4475 *
4476 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
4477 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
4478 */
4479 static int
smb3_init_transform_rq(struct TCP_Server_Info * server,int num_rqst,struct smb_rqst * new_rq,struct smb_rqst * old_rq)4480 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
4481 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
4482 {
4483 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
4484 struct page *page;
4485 unsigned int orig_len = 0;
4486 int i, j;
4487 int rc = -ENOMEM;
4488
4489 for (i = 1; i < num_rqst; i++) {
4490 struct smb_rqst *old = &old_rq[i - 1];
4491 struct smb_rqst *new = &new_rq[i];
4492 struct xarray *buffer = &new->rq_buffer;
4493 size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0;
4494
4495 orig_len += smb_rqst_len(server, old);
4496 new->rq_iov = old->rq_iov;
4497 new->rq_nvec = old->rq_nvec;
4498
4499 xa_init(buffer);
4500
4501 if (size > 0) {
4502 unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE);
4503
4504 for (j = 0; j < npages; j++) {
4505 void *o;
4506
4507 rc = -ENOMEM;
4508 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4509 if (!page)
4510 goto err_free;
4511 page->index = j;
4512 o = xa_store(buffer, j, page, GFP_KERNEL);
4513 if (xa_is_err(o)) {
4514 rc = xa_err(o);
4515 put_page(page);
4516 goto err_free;
4517 }
4518
4519 xa_set_mark(buffer, j, XA_MARK_0);
4520
4521 seg = min_t(size_t, size - copied, PAGE_SIZE);
4522 if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) {
4523 rc = -EFAULT;
4524 goto err_free;
4525 }
4526 copied += seg;
4527 }
4528 iov_iter_xarray(&new->rq_iter, ITER_SOURCE,
4529 buffer, 0, size);
4530 new->rq_iter_size = size;
4531 }
4532 }
4533
4534 /* fill the 1st iov with a transform header */
4535 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
4536
4537 rc = crypt_message(server, num_rqst, new_rq, 1);
4538 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
4539 if (rc)
4540 goto err_free;
4541
4542 return rc;
4543
4544 err_free:
4545 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
4546 return rc;
4547 }
4548
4549 static int
smb3_is_transform_hdr(void * buf)4550 smb3_is_transform_hdr(void *buf)
4551 {
4552 struct smb2_transform_hdr *trhdr = buf;
4553
4554 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
4555 }
4556
4557 static int
decrypt_raw_data(struct TCP_Server_Info * server,char * buf,unsigned int buf_data_size,struct iov_iter * iter,bool is_offloaded)4558 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
4559 unsigned int buf_data_size, struct iov_iter *iter,
4560 bool is_offloaded)
4561 {
4562 struct kvec iov[2];
4563 struct smb_rqst rqst = {NULL};
4564 size_t iter_size = 0;
4565 int rc;
4566
4567 iov[0].iov_base = buf;
4568 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
4569 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
4570 iov[1].iov_len = buf_data_size;
4571
4572 rqst.rq_iov = iov;
4573 rqst.rq_nvec = 2;
4574 if (iter) {
4575 rqst.rq_iter = *iter;
4576 rqst.rq_iter_size = iov_iter_count(iter);
4577 iter_size = iov_iter_count(iter);
4578 }
4579
4580 rc = crypt_message(server, 1, &rqst, 0);
4581 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
4582
4583 if (rc)
4584 return rc;
4585
4586 memmove(buf, iov[1].iov_base, buf_data_size);
4587
4588 if (!is_offloaded)
4589 server->total_read = buf_data_size + iter_size;
4590
4591 return rc;
4592 }
4593
4594 static int
cifs_copy_pages_to_iter(struct xarray * pages,unsigned int data_size,unsigned int skip,struct iov_iter * iter)4595 cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size,
4596 unsigned int skip, struct iov_iter *iter)
4597 {
4598 struct page *page;
4599 unsigned long index;
4600
4601 xa_for_each(pages, index, page) {
4602 size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size);
4603
4604 n = copy_page_to_iter(page, skip, len, iter);
4605 if (n != len) {
4606 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
4607 return -EIO;
4608 }
4609 data_size -= n;
4610 skip = 0;
4611 }
4612
4613 return 0;
4614 }
4615
4616 static int
handle_read_data(struct TCP_Server_Info * server,struct mid_q_entry * mid,char * buf,unsigned int buf_len,struct xarray * pages,unsigned int pages_len,bool is_offloaded)4617 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
4618 char *buf, unsigned int buf_len, struct xarray *pages,
4619 unsigned int pages_len, bool is_offloaded)
4620 {
4621 unsigned int data_offset;
4622 unsigned int data_len;
4623 unsigned int cur_off;
4624 unsigned int cur_page_idx;
4625 unsigned int pad_len;
4626 struct cifs_readdata *rdata = mid->callback_data;
4627 struct smb2_hdr *shdr = (struct smb2_hdr *)buf;
4628 int length;
4629 bool use_rdma_mr = false;
4630
4631 if (shdr->Command != SMB2_READ) {
4632 cifs_server_dbg(VFS, "only big read responses are supported\n");
4633 return -EOPNOTSUPP;
4634 }
4635
4636 if (server->ops->is_session_expired &&
4637 server->ops->is_session_expired(buf)) {
4638 if (!is_offloaded)
4639 cifs_reconnect(server, true);
4640 return -1;
4641 }
4642
4643 if (server->ops->is_status_pending &&
4644 server->ops->is_status_pending(buf, server))
4645 return -1;
4646
4647 /* set up first two iov to get credits */
4648 rdata->iov[0].iov_base = buf;
4649 rdata->iov[0].iov_len = 0;
4650 rdata->iov[1].iov_base = buf;
4651 rdata->iov[1].iov_len =
4652 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
4653 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
4654 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
4655 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
4656 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
4657
4658 rdata->result = server->ops->map_error(buf, true);
4659 if (rdata->result != 0) {
4660 cifs_dbg(FYI, "%s: server returned error %d\n",
4661 __func__, rdata->result);
4662 /* normal error on read response */
4663 if (is_offloaded)
4664 mid->mid_state = MID_RESPONSE_RECEIVED;
4665 else
4666 dequeue_mid(mid, false);
4667 return 0;
4668 }
4669
4670 data_offset = server->ops->read_data_offset(buf);
4671 #ifdef CONFIG_CIFS_SMB_DIRECT
4672 use_rdma_mr = rdata->mr;
4673 #endif
4674 data_len = server->ops->read_data_length(buf, use_rdma_mr);
4675
4676 if (data_offset < server->vals->read_rsp_size) {
4677 /*
4678 * win2k8 sometimes sends an offset of 0 when the read
4679 * is beyond the EOF. Treat it as if the data starts just after
4680 * the header.
4681 */
4682 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
4683 __func__, data_offset);
4684 data_offset = server->vals->read_rsp_size;
4685 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
4686 /* data_offset is beyond the end of smallbuf */
4687 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
4688 __func__, data_offset);
4689 rdata->result = -EIO;
4690 if (is_offloaded)
4691 mid->mid_state = MID_RESPONSE_MALFORMED;
4692 else
4693 dequeue_mid(mid, rdata->result);
4694 return 0;
4695 }
4696
4697 pad_len = data_offset - server->vals->read_rsp_size;
4698
4699 if (buf_len <= data_offset) {
4700 /* read response payload is in pages */
4701 cur_page_idx = pad_len / PAGE_SIZE;
4702 cur_off = pad_len % PAGE_SIZE;
4703
4704 if (cur_page_idx != 0) {
4705 /* data offset is beyond the 1st page of response */
4706 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
4707 __func__, data_offset);
4708 rdata->result = -EIO;
4709 if (is_offloaded)
4710 mid->mid_state = MID_RESPONSE_MALFORMED;
4711 else
4712 dequeue_mid(mid, rdata->result);
4713 return 0;
4714 }
4715
4716 if (data_len > pages_len - pad_len) {
4717 /* data_len is corrupt -- discard frame */
4718 rdata->result = -EIO;
4719 if (is_offloaded)
4720 mid->mid_state = MID_RESPONSE_MALFORMED;
4721 else
4722 dequeue_mid(mid, rdata->result);
4723 return 0;
4724 }
4725
4726 /* Copy the data to the output I/O iterator. */
4727 rdata->result = cifs_copy_pages_to_iter(pages, pages_len,
4728 cur_off, &rdata->iter);
4729 if (rdata->result != 0) {
4730 if (is_offloaded)
4731 mid->mid_state = MID_RESPONSE_MALFORMED;
4732 else
4733 dequeue_mid(mid, rdata->result);
4734 return 0;
4735 }
4736 rdata->got_bytes = pages_len;
4737
4738 } else if (buf_len >= data_offset + data_len) {
4739 /* read response payload is in buf */
4740 WARN_ONCE(pages && !xa_empty(pages),
4741 "read data can be either in buf or in pages");
4742 length = copy_to_iter(buf + data_offset, data_len, &rdata->iter);
4743 if (length < 0)
4744 return length;
4745 rdata->got_bytes = data_len;
4746 } else {
4747 /* read response payload cannot be in both buf and pages */
4748 WARN_ONCE(1, "buf can not contain only a part of read data");
4749 rdata->result = -EIO;
4750 if (is_offloaded)
4751 mid->mid_state = MID_RESPONSE_MALFORMED;
4752 else
4753 dequeue_mid(mid, rdata->result);
4754 return 0;
4755 }
4756
4757 if (is_offloaded)
4758 mid->mid_state = MID_RESPONSE_RECEIVED;
4759 else
4760 dequeue_mid(mid, false);
4761 return 0;
4762 }
4763
4764 struct smb2_decrypt_work {
4765 struct work_struct decrypt;
4766 struct TCP_Server_Info *server;
4767 struct xarray buffer;
4768 char *buf;
4769 unsigned int len;
4770 };
4771
4772
smb2_decrypt_offload(struct work_struct * work)4773 static void smb2_decrypt_offload(struct work_struct *work)
4774 {
4775 struct smb2_decrypt_work *dw = container_of(work,
4776 struct smb2_decrypt_work, decrypt);
4777 int rc;
4778 struct mid_q_entry *mid;
4779 struct iov_iter iter;
4780
4781 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len);
4782 rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size,
4783 &iter, true);
4784 if (rc) {
4785 cifs_dbg(VFS, "error decrypting rc=%d\n", rc);
4786 goto free_pages;
4787 }
4788
4789 dw->server->lstrp = jiffies;
4790 mid = smb2_find_dequeue_mid(dw->server, dw->buf);
4791 if (mid == NULL)
4792 cifs_dbg(FYI, "mid not found\n");
4793 else {
4794 mid->decrypted = true;
4795 rc = handle_read_data(dw->server, mid, dw->buf,
4796 dw->server->vals->read_rsp_size,
4797 &dw->buffer, dw->len,
4798 true);
4799 if (rc >= 0) {
4800 #ifdef CONFIG_CIFS_STATS2
4801 mid->when_received = jiffies;
4802 #endif
4803 if (dw->server->ops->is_network_name_deleted)
4804 dw->server->ops->is_network_name_deleted(dw->buf,
4805 dw->server);
4806
4807 mid->callback(mid);
4808 } else {
4809 spin_lock(&dw->server->srv_lock);
4810 if (dw->server->tcpStatus == CifsNeedReconnect) {
4811 spin_lock(&dw->server->mid_lock);
4812 mid->mid_state = MID_RETRY_NEEDED;
4813 spin_unlock(&dw->server->mid_lock);
4814 spin_unlock(&dw->server->srv_lock);
4815 mid->callback(mid);
4816 } else {
4817 spin_lock(&dw->server->mid_lock);
4818 mid->mid_state = MID_REQUEST_SUBMITTED;
4819 mid->mid_flags &= ~(MID_DELETED);
4820 list_add_tail(&mid->qhead,
4821 &dw->server->pending_mid_q);
4822 spin_unlock(&dw->server->mid_lock);
4823 spin_unlock(&dw->server->srv_lock);
4824 }
4825 }
4826 release_mid(mid);
4827 }
4828
4829 free_pages:
4830 cifs_clear_xarray_buffer(&dw->buffer);
4831 cifs_small_buf_release(dw->buf);
4832 kfree(dw);
4833 }
4834
4835
4836 static int
receive_encrypted_read(struct TCP_Server_Info * server,struct mid_q_entry ** mid,int * num_mids)4837 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid,
4838 int *num_mids)
4839 {
4840 struct page *page;
4841 char *buf = server->smallbuf;
4842 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4843 struct iov_iter iter;
4844 unsigned int len, npages;
4845 unsigned int buflen = server->pdu_size;
4846 int rc;
4847 int i = 0;
4848 struct smb2_decrypt_work *dw;
4849
4850 dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL);
4851 if (!dw)
4852 return -ENOMEM;
4853 xa_init(&dw->buffer);
4854 INIT_WORK(&dw->decrypt, smb2_decrypt_offload);
4855 dw->server = server;
4856
4857 *num_mids = 1;
4858 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4859 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4860
4861 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4862 if (rc < 0)
4863 goto free_dw;
4864 server->total_read += rc;
4865
4866 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4867 server->vals->read_rsp_size;
4868 dw->len = len;
4869 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4870
4871 rc = -ENOMEM;
4872 for (; i < npages; i++) {
4873 void *old;
4874
4875 page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4876 if (!page)
4877 goto discard_data;
4878 page->index = i;
4879 old = xa_store(&dw->buffer, i, page, GFP_KERNEL);
4880 if (xa_is_err(old)) {
4881 rc = xa_err(old);
4882 put_page(page);
4883 goto discard_data;
4884 }
4885 xa_set_mark(&dw->buffer, i, XA_MARK_0);
4886 }
4887
4888 iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE);
4889
4890 /* Read the data into the buffer and clear excess bufferage. */
4891 rc = cifs_read_iter_from_socket(server, &iter, dw->len);
4892 if (rc < 0)
4893 goto discard_data;
4894
4895 server->total_read += rc;
4896 if (rc < npages * PAGE_SIZE)
4897 iov_iter_zero(npages * PAGE_SIZE - rc, &iter);
4898 iov_iter_revert(&iter, npages * PAGE_SIZE);
4899 iov_iter_truncate(&iter, dw->len);
4900
4901 rc = cifs_discard_remaining_data(server);
4902 if (rc)
4903 goto free_pages;
4904
4905 /*
4906 * For large reads, offload to different thread for better performance,
4907 * use more cores decrypting which can be expensive
4908 */
4909
4910 if ((server->min_offload) && (server->in_flight > 1) &&
4911 (server->pdu_size >= server->min_offload)) {
4912 dw->buf = server->smallbuf;
4913 server->smallbuf = (char *)cifs_small_buf_get();
4914
4915 queue_work(decrypt_wq, &dw->decrypt);
4916 *num_mids = 0; /* worker thread takes care of finding mid */
4917 return -1;
4918 }
4919
4920 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4921 &iter, false);
4922 if (rc)
4923 goto free_pages;
4924
4925 *mid = smb2_find_mid(server, buf);
4926 if (*mid == NULL) {
4927 cifs_dbg(FYI, "mid not found\n");
4928 } else {
4929 cifs_dbg(FYI, "mid found\n");
4930 (*mid)->decrypted = true;
4931 rc = handle_read_data(server, *mid, buf,
4932 server->vals->read_rsp_size,
4933 &dw->buffer, dw->len, false);
4934 if (rc >= 0) {
4935 if (server->ops->is_network_name_deleted) {
4936 server->ops->is_network_name_deleted(buf,
4937 server);
4938 }
4939 }
4940 }
4941
4942 free_pages:
4943 cifs_clear_xarray_buffer(&dw->buffer);
4944 free_dw:
4945 kfree(dw);
4946 return rc;
4947 discard_data:
4948 cifs_discard_remaining_data(server);
4949 goto free_pages;
4950 }
4951
4952 static int
receive_encrypted_standard(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)4953 receive_encrypted_standard(struct TCP_Server_Info *server,
4954 struct mid_q_entry **mids, char **bufs,
4955 int *num_mids)
4956 {
4957 int ret, length;
4958 char *buf = server->smallbuf;
4959 struct smb2_hdr *shdr;
4960 unsigned int pdu_length = server->pdu_size;
4961 unsigned int buf_size;
4962 unsigned int next_cmd;
4963 struct mid_q_entry *mid_entry;
4964 int next_is_large;
4965 char *next_buffer = NULL;
4966
4967 *num_mids = 0;
4968
4969 /* switch to large buffer if too big for a small one */
4970 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4971 server->large_buf = true;
4972 memcpy(server->bigbuf, buf, server->total_read);
4973 buf = server->bigbuf;
4974 }
4975
4976 /* now read the rest */
4977 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4978 pdu_length - HEADER_SIZE(server) + 1);
4979 if (length < 0)
4980 return length;
4981 server->total_read += length;
4982
4983 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4984 length = decrypt_raw_data(server, buf, buf_size, NULL, false);
4985 if (length)
4986 return length;
4987
4988 next_is_large = server->large_buf;
4989 one_more:
4990 shdr = (struct smb2_hdr *)buf;
4991 next_cmd = le32_to_cpu(shdr->NextCommand);
4992 if (next_cmd) {
4993 if (WARN_ON_ONCE(next_cmd > pdu_length))
4994 return -1;
4995 if (next_is_large)
4996 next_buffer = (char *)cifs_buf_get();
4997 else
4998 next_buffer = (char *)cifs_small_buf_get();
4999 memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd);
5000 }
5001
5002 mid_entry = smb2_find_mid(server, buf);
5003 if (mid_entry == NULL)
5004 cifs_dbg(FYI, "mid not found\n");
5005 else {
5006 cifs_dbg(FYI, "mid found\n");
5007 mid_entry->decrypted = true;
5008 mid_entry->resp_buf_size = server->pdu_size;
5009 }
5010
5011 if (*num_mids >= MAX_COMPOUND) {
5012 cifs_server_dbg(VFS, "too many PDUs in compound\n");
5013 return -1;
5014 }
5015 bufs[*num_mids] = buf;
5016 mids[(*num_mids)++] = mid_entry;
5017
5018 if (mid_entry && mid_entry->handle)
5019 ret = mid_entry->handle(server, mid_entry);
5020 else
5021 ret = cifs_handle_standard(server, mid_entry);
5022
5023 if (ret == 0 && next_cmd) {
5024 pdu_length -= next_cmd;
5025 server->large_buf = next_is_large;
5026 if (next_is_large)
5027 server->bigbuf = buf = next_buffer;
5028 else
5029 server->smallbuf = buf = next_buffer;
5030 goto one_more;
5031 } else if (ret != 0) {
5032 /*
5033 * ret != 0 here means that we didn't get to handle_mid() thus
5034 * server->smallbuf and server->bigbuf are still valid. We need
5035 * to free next_buffer because it is not going to be used
5036 * anywhere.
5037 */
5038 if (next_is_large)
5039 free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer);
5040 else
5041 free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer);
5042 }
5043
5044 return ret;
5045 }
5046
5047 static int
smb3_receive_transform(struct TCP_Server_Info * server,struct mid_q_entry ** mids,char ** bufs,int * num_mids)5048 smb3_receive_transform(struct TCP_Server_Info *server,
5049 struct mid_q_entry **mids, char **bufs, int *num_mids)
5050 {
5051 char *buf = server->smallbuf;
5052 unsigned int pdu_length = server->pdu_size;
5053 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
5054 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
5055
5056 if (pdu_length < sizeof(struct smb2_transform_hdr) +
5057 sizeof(struct smb2_hdr)) {
5058 cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
5059 pdu_length);
5060 cifs_reconnect(server, true);
5061 return -ECONNABORTED;
5062 }
5063
5064 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
5065 cifs_server_dbg(VFS, "Transform message is broken\n");
5066 cifs_reconnect(server, true);
5067 return -ECONNABORTED;
5068 }
5069
5070 /* TODO: add support for compounds containing READ. */
5071 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
5072 return receive_encrypted_read(server, &mids[0], num_mids);
5073 }
5074
5075 return receive_encrypted_standard(server, mids, bufs, num_mids);
5076 }
5077
5078 int
smb3_handle_read_data(struct TCP_Server_Info * server,struct mid_q_entry * mid)5079 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
5080 {
5081 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
5082
5083 return handle_read_data(server, mid, buf, server->pdu_size,
5084 NULL, 0, false);
5085 }
5086
smb2_next_header(struct TCP_Server_Info * server,char * buf,unsigned int * noff)5087 static int smb2_next_header(struct TCP_Server_Info *server, char *buf,
5088 unsigned int *noff)
5089 {
5090 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
5091 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
5092
5093 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
5094 *noff = le32_to_cpu(t_hdr->OriginalMessageSize);
5095 if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff)))
5096 return -EINVAL;
5097 } else {
5098 *noff = le32_to_cpu(hdr->NextCommand);
5099 }
5100 if (unlikely(*noff && *noff < MID_HEADER_SIZE(server)))
5101 return -EINVAL;
5102 return 0;
5103 }
5104
5105 static int
smb2_make_node(unsigned int xid,struct inode * inode,struct dentry * dentry,struct cifs_tcon * tcon,const char * full_path,umode_t mode,dev_t dev)5106 smb2_make_node(unsigned int xid, struct inode *inode,
5107 struct dentry *dentry, struct cifs_tcon *tcon,
5108 const char *full_path, umode_t mode, dev_t dev)
5109 {
5110 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
5111 int rc = -EPERM;
5112 struct cifs_open_info_data buf = {};
5113 struct cifs_io_parms io_parms = {0};
5114 __u32 oplock = 0;
5115 struct cifs_fid fid;
5116 struct cifs_open_parms oparms;
5117 unsigned int bytes_written;
5118 struct win_dev *pdev;
5119 struct kvec iov[2];
5120
5121 /*
5122 * Check if mounted with mount parm 'sfu' mount parm.
5123 * SFU emulation should work with all servers, but only
5124 * supports block and char device (no socket & fifo),
5125 * and was used by default in earlier versions of Windows
5126 */
5127 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
5128 return rc;
5129
5130 /*
5131 * TODO: Add ability to create instead via reparse point. Windows (e.g.
5132 * their current NFS server) uses this approach to expose special files
5133 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
5134 */
5135
5136 if (!S_ISCHR(mode) && !S_ISBLK(mode) && !S_ISFIFO(mode))
5137 return rc;
5138
5139 cifs_dbg(FYI, "sfu compat create special file\n");
5140
5141 oparms = (struct cifs_open_parms) {
5142 .tcon = tcon,
5143 .cifs_sb = cifs_sb,
5144 .desired_access = GENERIC_WRITE,
5145 .create_options = cifs_create_options(cifs_sb, CREATE_NOT_DIR |
5146 CREATE_OPTION_SPECIAL),
5147 .disposition = FILE_CREATE,
5148 .path = full_path,
5149 .fid = &fid,
5150 };
5151
5152 if (tcon->ses->server->oplocks)
5153 oplock = REQ_OPLOCK;
5154 else
5155 oplock = 0;
5156 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, &buf);
5157 if (rc)
5158 return rc;
5159
5160 /*
5161 * BB Do not bother to decode buf since no local inode yet to put
5162 * timestamps in, but we can reuse it safely.
5163 */
5164
5165 pdev = (struct win_dev *)&buf.fi;
5166 io_parms.pid = current->tgid;
5167 io_parms.tcon = tcon;
5168 io_parms.offset = 0;
5169 io_parms.length = sizeof(struct win_dev);
5170 iov[1].iov_base = &buf.fi;
5171 iov[1].iov_len = sizeof(struct win_dev);
5172 if (S_ISCHR(mode)) {
5173 memcpy(pdev->type, "IntxCHR", 8);
5174 pdev->major = cpu_to_le64(MAJOR(dev));
5175 pdev->minor = cpu_to_le64(MINOR(dev));
5176 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5177 &bytes_written, iov, 1);
5178 } else if (S_ISBLK(mode)) {
5179 memcpy(pdev->type, "IntxBLK", 8);
5180 pdev->major = cpu_to_le64(MAJOR(dev));
5181 pdev->minor = cpu_to_le64(MINOR(dev));
5182 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5183 &bytes_written, iov, 1);
5184 } else if (S_ISFIFO(mode)) {
5185 memcpy(pdev->type, "LnxFIFO", 8);
5186 pdev->major = 0;
5187 pdev->minor = 0;
5188 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
5189 &bytes_written, iov, 1);
5190 }
5191 tcon->ses->server->ops->close(xid, tcon, &fid);
5192 d_drop(dentry);
5193
5194 /* FIXME: add code here to set EAs */
5195
5196 cifs_free_open_info(&buf);
5197 return rc;
5198 }
5199
5200 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5201 struct smb_version_operations smb20_operations = {
5202 .compare_fids = smb2_compare_fids,
5203 .setup_request = smb2_setup_request,
5204 .setup_async_request = smb2_setup_async_request,
5205 .check_receive = smb2_check_receive,
5206 .add_credits = smb2_add_credits,
5207 .set_credits = smb2_set_credits,
5208 .get_credits_field = smb2_get_credits_field,
5209 .get_credits = smb2_get_credits,
5210 .wait_mtu_credits = cifs_wait_mtu_credits,
5211 .get_next_mid = smb2_get_next_mid,
5212 .revert_current_mid = smb2_revert_current_mid,
5213 .read_data_offset = smb2_read_data_offset,
5214 .read_data_length = smb2_read_data_length,
5215 .map_error = map_smb2_to_linux_error,
5216 .find_mid = smb2_find_mid,
5217 .check_message = smb2_check_message,
5218 .dump_detail = smb2_dump_detail,
5219 .clear_stats = smb2_clear_stats,
5220 .print_stats = smb2_print_stats,
5221 .is_oplock_break = smb2_is_valid_oplock_break,
5222 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5223 .downgrade_oplock = smb2_downgrade_oplock,
5224 .need_neg = smb2_need_neg,
5225 .negotiate = smb2_negotiate,
5226 .negotiate_wsize = smb2_negotiate_wsize,
5227 .negotiate_rsize = smb2_negotiate_rsize,
5228 .sess_setup = SMB2_sess_setup,
5229 .logoff = SMB2_logoff,
5230 .tree_connect = SMB2_tcon,
5231 .tree_disconnect = SMB2_tdis,
5232 .qfs_tcon = smb2_qfs_tcon,
5233 .is_path_accessible = smb2_is_path_accessible,
5234 .can_echo = smb2_can_echo,
5235 .echo = SMB2_echo,
5236 .query_path_info = smb2_query_path_info,
5237 .query_reparse_point = smb2_query_reparse_point,
5238 .get_srv_inum = smb2_get_srv_inum,
5239 .query_file_info = smb2_query_file_info,
5240 .set_path_size = smb2_set_path_size,
5241 .set_file_size = smb2_set_file_size,
5242 .set_file_info = smb2_set_file_info,
5243 .set_compression = smb2_set_compression,
5244 .mkdir = smb2_mkdir,
5245 .mkdir_setinfo = smb2_mkdir_setinfo,
5246 .rmdir = smb2_rmdir,
5247 .unlink = smb2_unlink,
5248 .rename = smb2_rename_path,
5249 .create_hardlink = smb2_create_hardlink,
5250 .parse_reparse_point = smb2_parse_reparse_point,
5251 .query_mf_symlink = smb3_query_mf_symlink,
5252 .create_mf_symlink = smb3_create_mf_symlink,
5253 .open = smb2_open_file,
5254 .set_fid = smb2_set_fid,
5255 .close = smb2_close_file,
5256 .flush = smb2_flush_file,
5257 .async_readv = smb2_async_readv,
5258 .async_writev = smb2_async_writev,
5259 .sync_read = smb2_sync_read,
5260 .sync_write = smb2_sync_write,
5261 .query_dir_first = smb2_query_dir_first,
5262 .query_dir_next = smb2_query_dir_next,
5263 .close_dir = smb2_close_dir,
5264 .calc_smb_size = smb2_calc_size,
5265 .is_status_pending = smb2_is_status_pending,
5266 .is_session_expired = smb2_is_session_expired,
5267 .oplock_response = smb2_oplock_response,
5268 .queryfs = smb2_queryfs,
5269 .mand_lock = smb2_mand_lock,
5270 .mand_unlock_range = smb2_unlock_range,
5271 .push_mand_locks = smb2_push_mandatory_locks,
5272 .get_lease_key = smb2_get_lease_key,
5273 .set_lease_key = smb2_set_lease_key,
5274 .new_lease_key = smb2_new_lease_key,
5275 .calc_signature = smb2_calc_signature,
5276 .is_read_op = smb2_is_read_op,
5277 .set_oplock_level = smb2_set_oplock_level,
5278 .create_lease_buf = smb2_create_lease_buf,
5279 .parse_lease_buf = smb2_parse_lease_buf,
5280 .copychunk_range = smb2_copychunk_range,
5281 .wp_retry_size = smb2_wp_retry_size,
5282 .dir_needs_close = smb2_dir_needs_close,
5283 .get_dfs_refer = smb2_get_dfs_refer,
5284 .select_sectype = smb2_select_sectype,
5285 #ifdef CONFIG_CIFS_XATTR
5286 .query_all_EAs = smb2_query_eas,
5287 .set_EA = smb2_set_ea,
5288 #endif /* CIFS_XATTR */
5289 .get_acl = get_smb2_acl,
5290 .get_acl_by_fid = get_smb2_acl_by_fid,
5291 .set_acl = set_smb2_acl,
5292 .next_header = smb2_next_header,
5293 .ioctl_query_info = smb2_ioctl_query_info,
5294 .make_node = smb2_make_node,
5295 .fiemap = smb3_fiemap,
5296 .llseek = smb3_llseek,
5297 .is_status_io_timeout = smb2_is_status_io_timeout,
5298 .is_network_name_deleted = smb2_is_network_name_deleted,
5299 };
5300 #endif /* CIFS_ALLOW_INSECURE_LEGACY */
5301
5302 struct smb_version_operations smb21_operations = {
5303 .compare_fids = smb2_compare_fids,
5304 .setup_request = smb2_setup_request,
5305 .setup_async_request = smb2_setup_async_request,
5306 .check_receive = smb2_check_receive,
5307 .add_credits = smb2_add_credits,
5308 .set_credits = smb2_set_credits,
5309 .get_credits_field = smb2_get_credits_field,
5310 .get_credits = smb2_get_credits,
5311 .wait_mtu_credits = smb2_wait_mtu_credits,
5312 .adjust_credits = smb2_adjust_credits,
5313 .get_next_mid = smb2_get_next_mid,
5314 .revert_current_mid = smb2_revert_current_mid,
5315 .read_data_offset = smb2_read_data_offset,
5316 .read_data_length = smb2_read_data_length,
5317 .map_error = map_smb2_to_linux_error,
5318 .find_mid = smb2_find_mid,
5319 .check_message = smb2_check_message,
5320 .dump_detail = smb2_dump_detail,
5321 .clear_stats = smb2_clear_stats,
5322 .print_stats = smb2_print_stats,
5323 .is_oplock_break = smb2_is_valid_oplock_break,
5324 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5325 .downgrade_oplock = smb2_downgrade_oplock,
5326 .need_neg = smb2_need_neg,
5327 .negotiate = smb2_negotiate,
5328 .negotiate_wsize = smb2_negotiate_wsize,
5329 .negotiate_rsize = smb2_negotiate_rsize,
5330 .sess_setup = SMB2_sess_setup,
5331 .logoff = SMB2_logoff,
5332 .tree_connect = SMB2_tcon,
5333 .tree_disconnect = SMB2_tdis,
5334 .qfs_tcon = smb2_qfs_tcon,
5335 .is_path_accessible = smb2_is_path_accessible,
5336 .can_echo = smb2_can_echo,
5337 .echo = SMB2_echo,
5338 .query_path_info = smb2_query_path_info,
5339 .query_reparse_point = smb2_query_reparse_point,
5340 .get_srv_inum = smb2_get_srv_inum,
5341 .query_file_info = smb2_query_file_info,
5342 .set_path_size = smb2_set_path_size,
5343 .set_file_size = smb2_set_file_size,
5344 .set_file_info = smb2_set_file_info,
5345 .set_compression = smb2_set_compression,
5346 .mkdir = smb2_mkdir,
5347 .mkdir_setinfo = smb2_mkdir_setinfo,
5348 .rmdir = smb2_rmdir,
5349 .unlink = smb2_unlink,
5350 .rename = smb2_rename_path,
5351 .create_hardlink = smb2_create_hardlink,
5352 .parse_reparse_point = smb2_parse_reparse_point,
5353 .query_mf_symlink = smb3_query_mf_symlink,
5354 .create_mf_symlink = smb3_create_mf_symlink,
5355 .open = smb2_open_file,
5356 .set_fid = smb2_set_fid,
5357 .close = smb2_close_file,
5358 .flush = smb2_flush_file,
5359 .async_readv = smb2_async_readv,
5360 .async_writev = smb2_async_writev,
5361 .sync_read = smb2_sync_read,
5362 .sync_write = smb2_sync_write,
5363 .query_dir_first = smb2_query_dir_first,
5364 .query_dir_next = smb2_query_dir_next,
5365 .close_dir = smb2_close_dir,
5366 .calc_smb_size = smb2_calc_size,
5367 .is_status_pending = smb2_is_status_pending,
5368 .is_session_expired = smb2_is_session_expired,
5369 .oplock_response = smb2_oplock_response,
5370 .queryfs = smb2_queryfs,
5371 .mand_lock = smb2_mand_lock,
5372 .mand_unlock_range = smb2_unlock_range,
5373 .push_mand_locks = smb2_push_mandatory_locks,
5374 .get_lease_key = smb2_get_lease_key,
5375 .set_lease_key = smb2_set_lease_key,
5376 .new_lease_key = smb2_new_lease_key,
5377 .calc_signature = smb2_calc_signature,
5378 .is_read_op = smb21_is_read_op,
5379 .set_oplock_level = smb21_set_oplock_level,
5380 .create_lease_buf = smb2_create_lease_buf,
5381 .parse_lease_buf = smb2_parse_lease_buf,
5382 .copychunk_range = smb2_copychunk_range,
5383 .wp_retry_size = smb2_wp_retry_size,
5384 .dir_needs_close = smb2_dir_needs_close,
5385 .enum_snapshots = smb3_enum_snapshots,
5386 .notify = smb3_notify,
5387 .get_dfs_refer = smb2_get_dfs_refer,
5388 .select_sectype = smb2_select_sectype,
5389 #ifdef CONFIG_CIFS_XATTR
5390 .query_all_EAs = smb2_query_eas,
5391 .set_EA = smb2_set_ea,
5392 #endif /* CIFS_XATTR */
5393 .get_acl = get_smb2_acl,
5394 .get_acl_by_fid = get_smb2_acl_by_fid,
5395 .set_acl = set_smb2_acl,
5396 .next_header = smb2_next_header,
5397 .ioctl_query_info = smb2_ioctl_query_info,
5398 .make_node = smb2_make_node,
5399 .fiemap = smb3_fiemap,
5400 .llseek = smb3_llseek,
5401 .is_status_io_timeout = smb2_is_status_io_timeout,
5402 .is_network_name_deleted = smb2_is_network_name_deleted,
5403 };
5404
5405 struct smb_version_operations smb30_operations = {
5406 .compare_fids = smb2_compare_fids,
5407 .setup_request = smb2_setup_request,
5408 .setup_async_request = smb2_setup_async_request,
5409 .check_receive = smb2_check_receive,
5410 .add_credits = smb2_add_credits,
5411 .set_credits = smb2_set_credits,
5412 .get_credits_field = smb2_get_credits_field,
5413 .get_credits = smb2_get_credits,
5414 .wait_mtu_credits = smb2_wait_mtu_credits,
5415 .adjust_credits = smb2_adjust_credits,
5416 .get_next_mid = smb2_get_next_mid,
5417 .revert_current_mid = smb2_revert_current_mid,
5418 .read_data_offset = smb2_read_data_offset,
5419 .read_data_length = smb2_read_data_length,
5420 .map_error = map_smb2_to_linux_error,
5421 .find_mid = smb2_find_mid,
5422 .check_message = smb2_check_message,
5423 .dump_detail = smb2_dump_detail,
5424 .clear_stats = smb2_clear_stats,
5425 .print_stats = smb2_print_stats,
5426 .dump_share_caps = smb2_dump_share_caps,
5427 .is_oplock_break = smb2_is_valid_oplock_break,
5428 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5429 .downgrade_oplock = smb3_downgrade_oplock,
5430 .need_neg = smb2_need_neg,
5431 .negotiate = smb2_negotiate,
5432 .negotiate_wsize = smb3_negotiate_wsize,
5433 .negotiate_rsize = smb3_negotiate_rsize,
5434 .sess_setup = SMB2_sess_setup,
5435 .logoff = SMB2_logoff,
5436 .tree_connect = SMB2_tcon,
5437 .tree_disconnect = SMB2_tdis,
5438 .qfs_tcon = smb3_qfs_tcon,
5439 .is_path_accessible = smb2_is_path_accessible,
5440 .can_echo = smb2_can_echo,
5441 .echo = SMB2_echo,
5442 .query_path_info = smb2_query_path_info,
5443 /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */
5444 .query_reparse_point = smb2_query_reparse_point,
5445 .get_srv_inum = smb2_get_srv_inum,
5446 .query_file_info = smb2_query_file_info,
5447 .set_path_size = smb2_set_path_size,
5448 .set_file_size = smb2_set_file_size,
5449 .set_file_info = smb2_set_file_info,
5450 .set_compression = smb2_set_compression,
5451 .mkdir = smb2_mkdir,
5452 .mkdir_setinfo = smb2_mkdir_setinfo,
5453 .rmdir = smb2_rmdir,
5454 .unlink = smb2_unlink,
5455 .rename = smb2_rename_path,
5456 .create_hardlink = smb2_create_hardlink,
5457 .parse_reparse_point = smb2_parse_reparse_point,
5458 .query_mf_symlink = smb3_query_mf_symlink,
5459 .create_mf_symlink = smb3_create_mf_symlink,
5460 .open = smb2_open_file,
5461 .set_fid = smb2_set_fid,
5462 .close = smb2_close_file,
5463 .close_getattr = smb2_close_getattr,
5464 .flush = smb2_flush_file,
5465 .async_readv = smb2_async_readv,
5466 .async_writev = smb2_async_writev,
5467 .sync_read = smb2_sync_read,
5468 .sync_write = smb2_sync_write,
5469 .query_dir_first = smb2_query_dir_first,
5470 .query_dir_next = smb2_query_dir_next,
5471 .close_dir = smb2_close_dir,
5472 .calc_smb_size = smb2_calc_size,
5473 .is_status_pending = smb2_is_status_pending,
5474 .is_session_expired = smb2_is_session_expired,
5475 .oplock_response = smb2_oplock_response,
5476 .queryfs = smb2_queryfs,
5477 .mand_lock = smb2_mand_lock,
5478 .mand_unlock_range = smb2_unlock_range,
5479 .push_mand_locks = smb2_push_mandatory_locks,
5480 .get_lease_key = smb2_get_lease_key,
5481 .set_lease_key = smb2_set_lease_key,
5482 .new_lease_key = smb2_new_lease_key,
5483 .generate_signingkey = generate_smb30signingkey,
5484 .calc_signature = smb3_calc_signature,
5485 .set_integrity = smb3_set_integrity,
5486 .is_read_op = smb21_is_read_op,
5487 .set_oplock_level = smb3_set_oplock_level,
5488 .create_lease_buf = smb3_create_lease_buf,
5489 .parse_lease_buf = smb3_parse_lease_buf,
5490 .copychunk_range = smb2_copychunk_range,
5491 .duplicate_extents = smb2_duplicate_extents,
5492 .validate_negotiate = smb3_validate_negotiate,
5493 .wp_retry_size = smb2_wp_retry_size,
5494 .dir_needs_close = smb2_dir_needs_close,
5495 .fallocate = smb3_fallocate,
5496 .enum_snapshots = smb3_enum_snapshots,
5497 .notify = smb3_notify,
5498 .init_transform_rq = smb3_init_transform_rq,
5499 .is_transform_hdr = smb3_is_transform_hdr,
5500 .receive_transform = smb3_receive_transform,
5501 .get_dfs_refer = smb2_get_dfs_refer,
5502 .select_sectype = smb2_select_sectype,
5503 #ifdef CONFIG_CIFS_XATTR
5504 .query_all_EAs = smb2_query_eas,
5505 .set_EA = smb2_set_ea,
5506 #endif /* CIFS_XATTR */
5507 .get_acl = get_smb2_acl,
5508 .get_acl_by_fid = get_smb2_acl_by_fid,
5509 .set_acl = set_smb2_acl,
5510 .next_header = smb2_next_header,
5511 .ioctl_query_info = smb2_ioctl_query_info,
5512 .make_node = smb2_make_node,
5513 .fiemap = smb3_fiemap,
5514 .llseek = smb3_llseek,
5515 .is_status_io_timeout = smb2_is_status_io_timeout,
5516 .is_network_name_deleted = smb2_is_network_name_deleted,
5517 };
5518
5519 struct smb_version_operations smb311_operations = {
5520 .compare_fids = smb2_compare_fids,
5521 .setup_request = smb2_setup_request,
5522 .setup_async_request = smb2_setup_async_request,
5523 .check_receive = smb2_check_receive,
5524 .add_credits = smb2_add_credits,
5525 .set_credits = smb2_set_credits,
5526 .get_credits_field = smb2_get_credits_field,
5527 .get_credits = smb2_get_credits,
5528 .wait_mtu_credits = smb2_wait_mtu_credits,
5529 .adjust_credits = smb2_adjust_credits,
5530 .get_next_mid = smb2_get_next_mid,
5531 .revert_current_mid = smb2_revert_current_mid,
5532 .read_data_offset = smb2_read_data_offset,
5533 .read_data_length = smb2_read_data_length,
5534 .map_error = map_smb2_to_linux_error,
5535 .find_mid = smb2_find_mid,
5536 .check_message = smb2_check_message,
5537 .dump_detail = smb2_dump_detail,
5538 .clear_stats = smb2_clear_stats,
5539 .print_stats = smb2_print_stats,
5540 .dump_share_caps = smb2_dump_share_caps,
5541 .is_oplock_break = smb2_is_valid_oplock_break,
5542 .handle_cancelled_mid = smb2_handle_cancelled_mid,
5543 .downgrade_oplock = smb3_downgrade_oplock,
5544 .need_neg = smb2_need_neg,
5545 .negotiate = smb2_negotiate,
5546 .negotiate_wsize = smb3_negotiate_wsize,
5547 .negotiate_rsize = smb3_negotiate_rsize,
5548 .sess_setup = SMB2_sess_setup,
5549 .logoff = SMB2_logoff,
5550 .tree_connect = SMB2_tcon,
5551 .tree_disconnect = SMB2_tdis,
5552 .qfs_tcon = smb3_qfs_tcon,
5553 .is_path_accessible = smb2_is_path_accessible,
5554 .can_echo = smb2_can_echo,
5555 .echo = SMB2_echo,
5556 .query_path_info = smb2_query_path_info,
5557 .query_reparse_point = smb2_query_reparse_point,
5558 .get_srv_inum = smb2_get_srv_inum,
5559 .query_file_info = smb2_query_file_info,
5560 .set_path_size = smb2_set_path_size,
5561 .set_file_size = smb2_set_file_size,
5562 .set_file_info = smb2_set_file_info,
5563 .set_compression = smb2_set_compression,
5564 .mkdir = smb2_mkdir,
5565 .mkdir_setinfo = smb2_mkdir_setinfo,
5566 .posix_mkdir = smb311_posix_mkdir,
5567 .rmdir = smb2_rmdir,
5568 .unlink = smb2_unlink,
5569 .rename = smb2_rename_path,
5570 .create_hardlink = smb2_create_hardlink,
5571 .parse_reparse_point = smb2_parse_reparse_point,
5572 .query_mf_symlink = smb3_query_mf_symlink,
5573 .create_mf_symlink = smb3_create_mf_symlink,
5574 .open = smb2_open_file,
5575 .set_fid = smb2_set_fid,
5576 .close = smb2_close_file,
5577 .close_getattr = smb2_close_getattr,
5578 .flush = smb2_flush_file,
5579 .async_readv = smb2_async_readv,
5580 .async_writev = smb2_async_writev,
5581 .sync_read = smb2_sync_read,
5582 .sync_write = smb2_sync_write,
5583 .query_dir_first = smb2_query_dir_first,
5584 .query_dir_next = smb2_query_dir_next,
5585 .close_dir = smb2_close_dir,
5586 .calc_smb_size = smb2_calc_size,
5587 .is_status_pending = smb2_is_status_pending,
5588 .is_session_expired = smb2_is_session_expired,
5589 .oplock_response = smb2_oplock_response,
5590 .queryfs = smb311_queryfs,
5591 .mand_lock = smb2_mand_lock,
5592 .mand_unlock_range = smb2_unlock_range,
5593 .push_mand_locks = smb2_push_mandatory_locks,
5594 .get_lease_key = smb2_get_lease_key,
5595 .set_lease_key = smb2_set_lease_key,
5596 .new_lease_key = smb2_new_lease_key,
5597 .generate_signingkey = generate_smb311signingkey,
5598 .calc_signature = smb3_calc_signature,
5599 .set_integrity = smb3_set_integrity,
5600 .is_read_op = smb21_is_read_op,
5601 .set_oplock_level = smb3_set_oplock_level,
5602 .create_lease_buf = smb3_create_lease_buf,
5603 .parse_lease_buf = smb3_parse_lease_buf,
5604 .copychunk_range = smb2_copychunk_range,
5605 .duplicate_extents = smb2_duplicate_extents,
5606 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
5607 .wp_retry_size = smb2_wp_retry_size,
5608 .dir_needs_close = smb2_dir_needs_close,
5609 .fallocate = smb3_fallocate,
5610 .enum_snapshots = smb3_enum_snapshots,
5611 .notify = smb3_notify,
5612 .init_transform_rq = smb3_init_transform_rq,
5613 .is_transform_hdr = smb3_is_transform_hdr,
5614 .receive_transform = smb3_receive_transform,
5615 .get_dfs_refer = smb2_get_dfs_refer,
5616 .select_sectype = smb2_select_sectype,
5617 #ifdef CONFIG_CIFS_XATTR
5618 .query_all_EAs = smb2_query_eas,
5619 .set_EA = smb2_set_ea,
5620 #endif /* CIFS_XATTR */
5621 .get_acl = get_smb2_acl,
5622 .get_acl_by_fid = get_smb2_acl_by_fid,
5623 .set_acl = set_smb2_acl,
5624 .next_header = smb2_next_header,
5625 .ioctl_query_info = smb2_ioctl_query_info,
5626 .make_node = smb2_make_node,
5627 .fiemap = smb3_fiemap,
5628 .llseek = smb3_llseek,
5629 .is_status_io_timeout = smb2_is_status_io_timeout,
5630 .is_network_name_deleted = smb2_is_network_name_deleted,
5631 };
5632
5633 #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
5634 struct smb_version_values smb20_values = {
5635 .version_string = SMB20_VERSION_STRING,
5636 .protocol_id = SMB20_PROT_ID,
5637 .req_capabilities = 0, /* MBZ */
5638 .large_lock_type = 0,
5639 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5640 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5641 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5642 .header_size = sizeof(struct smb2_hdr),
5643 .header_preamble_size = 0,
5644 .max_header_size = MAX_SMB2_HDR_SIZE,
5645 .read_rsp_size = sizeof(struct smb2_read_rsp),
5646 .lock_cmd = SMB2_LOCK,
5647 .cap_unix = 0,
5648 .cap_nt_find = SMB2_NT_FIND,
5649 .cap_large_files = SMB2_LARGE_FILES,
5650 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5651 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5652 .create_lease_size = sizeof(struct create_lease),
5653 };
5654 #endif /* ALLOW_INSECURE_LEGACY */
5655
5656 struct smb_version_values smb21_values = {
5657 .version_string = SMB21_VERSION_STRING,
5658 .protocol_id = SMB21_PROT_ID,
5659 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
5660 .large_lock_type = 0,
5661 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5662 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5663 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5664 .header_size = sizeof(struct smb2_hdr),
5665 .header_preamble_size = 0,
5666 .max_header_size = MAX_SMB2_HDR_SIZE,
5667 .read_rsp_size = sizeof(struct smb2_read_rsp),
5668 .lock_cmd = SMB2_LOCK,
5669 .cap_unix = 0,
5670 .cap_nt_find = SMB2_NT_FIND,
5671 .cap_large_files = SMB2_LARGE_FILES,
5672 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5673 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5674 .create_lease_size = sizeof(struct create_lease),
5675 };
5676
5677 struct smb_version_values smb3any_values = {
5678 .version_string = SMB3ANY_VERSION_STRING,
5679 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5680 .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,
5681 .large_lock_type = 0,
5682 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5683 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5684 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5685 .header_size = sizeof(struct smb2_hdr),
5686 .header_preamble_size = 0,
5687 .max_header_size = MAX_SMB2_HDR_SIZE,
5688 .read_rsp_size = sizeof(struct smb2_read_rsp),
5689 .lock_cmd = SMB2_LOCK,
5690 .cap_unix = 0,
5691 .cap_nt_find = SMB2_NT_FIND,
5692 .cap_large_files = SMB2_LARGE_FILES,
5693 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5694 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5695 .create_lease_size = sizeof(struct create_lease_v2),
5696 };
5697
5698 struct smb_version_values smbdefault_values = {
5699 .version_string = SMBDEFAULT_VERSION_STRING,
5700 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
5701 .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,
5702 .large_lock_type = 0,
5703 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5704 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5705 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5706 .header_size = sizeof(struct smb2_hdr),
5707 .header_preamble_size = 0,
5708 .max_header_size = MAX_SMB2_HDR_SIZE,
5709 .read_rsp_size = sizeof(struct smb2_read_rsp),
5710 .lock_cmd = SMB2_LOCK,
5711 .cap_unix = 0,
5712 .cap_nt_find = SMB2_NT_FIND,
5713 .cap_large_files = SMB2_LARGE_FILES,
5714 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5715 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5716 .create_lease_size = sizeof(struct create_lease_v2),
5717 };
5718
5719 struct smb_version_values smb30_values = {
5720 .version_string = SMB30_VERSION_STRING,
5721 .protocol_id = SMB30_PROT_ID,
5722 .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,
5723 .large_lock_type = 0,
5724 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5725 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5726 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5727 .header_size = sizeof(struct smb2_hdr),
5728 .header_preamble_size = 0,
5729 .max_header_size = MAX_SMB2_HDR_SIZE,
5730 .read_rsp_size = sizeof(struct smb2_read_rsp),
5731 .lock_cmd = SMB2_LOCK,
5732 .cap_unix = 0,
5733 .cap_nt_find = SMB2_NT_FIND,
5734 .cap_large_files = SMB2_LARGE_FILES,
5735 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5736 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5737 .create_lease_size = sizeof(struct create_lease_v2),
5738 };
5739
5740 struct smb_version_values smb302_values = {
5741 .version_string = SMB302_VERSION_STRING,
5742 .protocol_id = SMB302_PROT_ID,
5743 .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,
5744 .large_lock_type = 0,
5745 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5746 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5747 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5748 .header_size = sizeof(struct smb2_hdr),
5749 .header_preamble_size = 0,
5750 .max_header_size = MAX_SMB2_HDR_SIZE,
5751 .read_rsp_size = sizeof(struct smb2_read_rsp),
5752 .lock_cmd = SMB2_LOCK,
5753 .cap_unix = 0,
5754 .cap_nt_find = SMB2_NT_FIND,
5755 .cap_large_files = SMB2_LARGE_FILES,
5756 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5757 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5758 .create_lease_size = sizeof(struct create_lease_v2),
5759 };
5760
5761 struct smb_version_values smb311_values = {
5762 .version_string = SMB311_VERSION_STRING,
5763 .protocol_id = SMB311_PROT_ID,
5764 .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,
5765 .large_lock_type = 0,
5766 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE,
5767 .shared_lock_type = SMB2_LOCKFLAG_SHARED,
5768 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
5769 .header_size = sizeof(struct smb2_hdr),
5770 .header_preamble_size = 0,
5771 .max_header_size = MAX_SMB2_HDR_SIZE,
5772 .read_rsp_size = sizeof(struct smb2_read_rsp),
5773 .lock_cmd = SMB2_LOCK,
5774 .cap_unix = 0,
5775 .cap_nt_find = SMB2_NT_FIND,
5776 .cap_large_files = SMB2_LARGE_FILES,
5777 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
5778 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
5779 .create_lease_size = sizeof(struct create_lease_v2),
5780 };
5781