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[thirdparty/linux.git] / fs / cifs / smb2ops.c
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 <crypto/aead.h>
14 #include "cifsglob.h"
15 #include "smb2pdu.h"
16 #include "smb2proto.h"
17 #include "cifsproto.h"
18 #include "cifs_debug.h"
19 #include "cifs_unicode.h"
20 #include "smb2status.h"
21 #include "smb2glob.h"
22 #include "cifs_ioctl.h"
23 #include "smbdirect.h"
24
25 /* Change credits for different ops and return the total number of credits */
26 static int
27 change_conf(struct TCP_Server_Info *server)
28 {
29 server->credits += server->echo_credits + server->oplock_credits;
30 server->oplock_credits = server->echo_credits = 0;
31 switch (server->credits) {
32 case 0:
33 return 0;
34 case 1:
35 server->echoes = false;
36 server->oplocks = false;
37 break;
38 case 2:
39 server->echoes = true;
40 server->oplocks = false;
41 server->echo_credits = 1;
42 break;
43 default:
44 server->echoes = true;
45 if (enable_oplocks) {
46 server->oplocks = true;
47 server->oplock_credits = 1;
48 } else
49 server->oplocks = false;
50
51 server->echo_credits = 1;
52 }
53 server->credits -= server->echo_credits + server->oplock_credits;
54 return server->credits + server->echo_credits + server->oplock_credits;
55 }
56
57 static void
58 smb2_add_credits(struct TCP_Server_Info *server,
59 const struct cifs_credits *credits, const int optype)
60 {
61 int *val, rc = -1;
62 unsigned int add = credits->value;
63 unsigned int instance = credits->instance;
64 bool reconnect_detected = false;
65
66 spin_lock(&server->req_lock);
67 val = server->ops->get_credits_field(server, optype);
68
69 /* eg found case where write overlapping reconnect messed up credits */
70 if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
71 trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
72 server->hostname, *val);
73 if ((instance == 0) || (instance == server->reconnect_instance))
74 *val += add;
75 else
76 reconnect_detected = true;
77
78 if (*val > 65000) {
79 *val = 65000; /* Don't get near 64K credits, avoid srv bugs */
80 printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
81 }
82 server->in_flight--;
83 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
84 rc = change_conf(server);
85 /*
86 * Sometimes server returns 0 credits on oplock break ack - we need to
87 * rebalance credits in this case.
88 */
89 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
90 server->oplocks) {
91 if (server->credits > 1) {
92 server->credits--;
93 server->oplock_credits++;
94 }
95 }
96 spin_unlock(&server->req_lock);
97 wake_up(&server->request_q);
98
99 if (reconnect_detected)
100 cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
101 add, instance);
102
103 if (server->tcpStatus == CifsNeedReconnect
104 || server->tcpStatus == CifsExiting)
105 return;
106
107 switch (rc) {
108 case -1:
109 /* change_conf hasn't been executed */
110 break;
111 case 0:
112 cifs_dbg(VFS, "Possible client or server bug - zero credits\n");
113 break;
114 case 1:
115 cifs_dbg(VFS, "disabling echoes and oplocks\n");
116 break;
117 case 2:
118 cifs_dbg(FYI, "disabling oplocks\n");
119 break;
120 default:
121 cifs_dbg(FYI, "add %u credits total=%d\n", add, rc);
122 }
123 }
124
125 static void
126 smb2_set_credits(struct TCP_Server_Info *server, const int val)
127 {
128 spin_lock(&server->req_lock);
129 server->credits = val;
130 if (val == 1)
131 server->reconnect_instance++;
132 spin_unlock(&server->req_lock);
133 /* don't log while holding the lock */
134 if (val == 1)
135 cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n");
136 }
137
138 static int *
139 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
140 {
141 switch (optype) {
142 case CIFS_ECHO_OP:
143 return &server->echo_credits;
144 case CIFS_OBREAK_OP:
145 return &server->oplock_credits;
146 default:
147 return &server->credits;
148 }
149 }
150
151 static unsigned int
152 smb2_get_credits(struct mid_q_entry *mid)
153 {
154 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)mid->resp_buf;
155
156 if (mid->mid_state == MID_RESPONSE_RECEIVED
157 || mid->mid_state == MID_RESPONSE_MALFORMED)
158 return le16_to_cpu(shdr->CreditRequest);
159
160 return 0;
161 }
162
163 static int
164 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
165 unsigned int *num, struct cifs_credits *credits)
166 {
167 int rc = 0;
168 unsigned int scredits;
169
170 spin_lock(&server->req_lock);
171 while (1) {
172 if (server->credits <= 0) {
173 spin_unlock(&server->req_lock);
174 cifs_num_waiters_inc(server);
175 rc = wait_event_killable(server->request_q,
176 has_credits(server, &server->credits, 1));
177 cifs_num_waiters_dec(server);
178 if (rc)
179 return rc;
180 spin_lock(&server->req_lock);
181 } else {
182 if (server->tcpStatus == CifsExiting) {
183 spin_unlock(&server->req_lock);
184 return -ENOENT;
185 }
186
187 scredits = server->credits;
188 /* can deadlock with reopen */
189 if (scredits <= 8) {
190 *num = SMB2_MAX_BUFFER_SIZE;
191 credits->value = 0;
192 credits->instance = 0;
193 break;
194 }
195
196 /* leave some credits for reopen and other ops */
197 scredits -= 8;
198 *num = min_t(unsigned int, size,
199 scredits * SMB2_MAX_BUFFER_SIZE);
200
201 credits->value =
202 DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
203 credits->instance = server->reconnect_instance;
204 server->credits -= credits->value;
205 server->in_flight++;
206 break;
207 }
208 }
209 spin_unlock(&server->req_lock);
210 return rc;
211 }
212
213 static int
214 smb2_adjust_credits(struct TCP_Server_Info *server,
215 struct cifs_credits *credits,
216 const unsigned int payload_size)
217 {
218 int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
219
220 if (!credits->value || credits->value == new_val)
221 return 0;
222
223 if (credits->value < new_val) {
224 WARN_ONCE(1, "request has less credits (%d) than required (%d)",
225 credits->value, new_val);
226 return -ENOTSUPP;
227 }
228
229 spin_lock(&server->req_lock);
230
231 if (server->reconnect_instance != credits->instance) {
232 spin_unlock(&server->req_lock);
233 cifs_dbg(VFS, "trying to return %d credits to old session\n",
234 credits->value - new_val);
235 return -EAGAIN;
236 }
237
238 server->credits += credits->value - new_val;
239 spin_unlock(&server->req_lock);
240 wake_up(&server->request_q);
241 credits->value = new_val;
242 return 0;
243 }
244
245 static __u64
246 smb2_get_next_mid(struct TCP_Server_Info *server)
247 {
248 __u64 mid;
249 /* for SMB2 we need the current value */
250 spin_lock(&GlobalMid_Lock);
251 mid = server->CurrentMid++;
252 spin_unlock(&GlobalMid_Lock);
253 return mid;
254 }
255
256 static void
257 smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
258 {
259 spin_lock(&GlobalMid_Lock);
260 if (server->CurrentMid >= val)
261 server->CurrentMid -= val;
262 spin_unlock(&GlobalMid_Lock);
263 }
264
265 static struct mid_q_entry *
266 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
267 {
268 struct mid_q_entry *mid;
269 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
270 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
271
272 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
273 cifs_dbg(VFS, "Encrypted frame parsing not supported yet\n");
274 return NULL;
275 }
276
277 spin_lock(&GlobalMid_Lock);
278 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
279 if ((mid->mid == wire_mid) &&
280 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
281 (mid->command == shdr->Command)) {
282 kref_get(&mid->refcount);
283 spin_unlock(&GlobalMid_Lock);
284 return mid;
285 }
286 }
287 spin_unlock(&GlobalMid_Lock);
288 return NULL;
289 }
290
291 static void
292 smb2_dump_detail(void *buf, struct TCP_Server_Info *server)
293 {
294 #ifdef CONFIG_CIFS_DEBUG2
295 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
296
297 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
298 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
299 shdr->ProcessId);
300 cifs_dbg(VFS, "smb buf %p len %u\n", buf,
301 server->ops->calc_smb_size(buf, server));
302 #endif
303 }
304
305 static bool
306 smb2_need_neg(struct TCP_Server_Info *server)
307 {
308 return server->max_read == 0;
309 }
310
311 static int
312 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
313 {
314 int rc;
315
316 ses->server->CurrentMid = 0;
317 rc = SMB2_negotiate(xid, ses);
318 /* BB we probably don't need to retry with modern servers */
319 if (rc == -EAGAIN)
320 rc = -EHOSTDOWN;
321 return rc;
322 }
323
324 static unsigned int
325 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
326 {
327 struct TCP_Server_Info *server = tcon->ses->server;
328 unsigned int wsize;
329
330 /* start with specified wsize, or default */
331 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
332 wsize = min_t(unsigned int, wsize, server->max_write);
333 #ifdef CONFIG_CIFS_SMB_DIRECT
334 if (server->rdma) {
335 if (server->sign)
336 wsize = min_t(unsigned int,
337 wsize, server->smbd_conn->max_fragmented_send_size);
338 else
339 wsize = min_t(unsigned int,
340 wsize, server->smbd_conn->max_readwrite_size);
341 }
342 #endif
343 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
344 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
345
346 return wsize;
347 }
348
349 static unsigned int
350 smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
351 {
352 struct TCP_Server_Info *server = tcon->ses->server;
353 unsigned int wsize;
354
355 /* start with specified wsize, or default */
356 wsize = volume_info->wsize ? volume_info->wsize : SMB3_DEFAULT_IOSIZE;
357 wsize = min_t(unsigned int, wsize, server->max_write);
358 #ifdef CONFIG_CIFS_SMB_DIRECT
359 if (server->rdma) {
360 if (server->sign)
361 wsize = min_t(unsigned int,
362 wsize, server->smbd_conn->max_fragmented_send_size);
363 else
364 wsize = min_t(unsigned int,
365 wsize, server->smbd_conn->max_readwrite_size);
366 }
367 #endif
368 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
369 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
370
371 return wsize;
372 }
373
374 static unsigned int
375 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
376 {
377 struct TCP_Server_Info *server = tcon->ses->server;
378 unsigned int rsize;
379
380 /* start with specified rsize, or default */
381 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
382 rsize = min_t(unsigned int, rsize, server->max_read);
383 #ifdef CONFIG_CIFS_SMB_DIRECT
384 if (server->rdma) {
385 if (server->sign)
386 rsize = min_t(unsigned int,
387 rsize, server->smbd_conn->max_fragmented_recv_size);
388 else
389 rsize = min_t(unsigned int,
390 rsize, server->smbd_conn->max_readwrite_size);
391 }
392 #endif
393
394 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
395 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
396
397 return rsize;
398 }
399
400 static unsigned int
401 smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
402 {
403 struct TCP_Server_Info *server = tcon->ses->server;
404 unsigned int rsize;
405
406 /* start with specified rsize, or default */
407 rsize = volume_info->rsize ? volume_info->rsize : SMB3_DEFAULT_IOSIZE;
408 rsize = min_t(unsigned int, rsize, server->max_read);
409 #ifdef CONFIG_CIFS_SMB_DIRECT
410 if (server->rdma) {
411 if (server->sign)
412 rsize = min_t(unsigned int,
413 rsize, server->smbd_conn->max_fragmented_recv_size);
414 else
415 rsize = min_t(unsigned int,
416 rsize, server->smbd_conn->max_readwrite_size);
417 }
418 #endif
419
420 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
421 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
422
423 return rsize;
424 }
425
426 static int
427 parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
428 size_t buf_len,
429 struct cifs_server_iface **iface_list,
430 size_t *iface_count)
431 {
432 struct network_interface_info_ioctl_rsp *p;
433 struct sockaddr_in *addr4;
434 struct sockaddr_in6 *addr6;
435 struct iface_info_ipv4 *p4;
436 struct iface_info_ipv6 *p6;
437 struct cifs_server_iface *info;
438 ssize_t bytes_left;
439 size_t next = 0;
440 int nb_iface = 0;
441 int rc = 0;
442
443 *iface_list = NULL;
444 *iface_count = 0;
445
446 /*
447 * Fist pass: count and sanity check
448 */
449
450 bytes_left = buf_len;
451 p = buf;
452 while (bytes_left >= sizeof(*p)) {
453 nb_iface++;
454 next = le32_to_cpu(p->Next);
455 if (!next) {
456 bytes_left -= sizeof(*p);
457 break;
458 }
459 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
460 bytes_left -= next;
461 }
462
463 if (!nb_iface) {
464 cifs_dbg(VFS, "%s: malformed interface info\n", __func__);
465 rc = -EINVAL;
466 goto out;
467 }
468
469 if (bytes_left || p->Next)
470 cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);
471
472
473 /*
474 * Second pass: extract info to internal structure
475 */
476
477 *iface_list = kcalloc(nb_iface, sizeof(**iface_list), GFP_KERNEL);
478 if (!*iface_list) {
479 rc = -ENOMEM;
480 goto out;
481 }
482
483 info = *iface_list;
484 bytes_left = buf_len;
485 p = buf;
486 while (bytes_left >= sizeof(*p)) {
487 info->speed = le64_to_cpu(p->LinkSpeed);
488 info->rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE);
489 info->rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE);
490
491 cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, *iface_count);
492 cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed);
493 cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__,
494 le32_to_cpu(p->Capability));
495
496 switch (p->Family) {
497 /*
498 * The kernel and wire socket structures have the same
499 * layout and use network byte order but make the
500 * conversion explicit in case either one changes.
501 */
502 case INTERNETWORK:
503 addr4 = (struct sockaddr_in *)&info->sockaddr;
504 p4 = (struct iface_info_ipv4 *)p->Buffer;
505 addr4->sin_family = AF_INET;
506 memcpy(&addr4->sin_addr, &p4->IPv4Address, 4);
507
508 /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */
509 addr4->sin_port = cpu_to_be16(CIFS_PORT);
510
511 cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__,
512 &addr4->sin_addr);
513 break;
514 case INTERNETWORKV6:
515 addr6 = (struct sockaddr_in6 *)&info->sockaddr;
516 p6 = (struct iface_info_ipv6 *)p->Buffer;
517 addr6->sin6_family = AF_INET6;
518 memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16);
519
520 /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */
521 addr6->sin6_flowinfo = 0;
522 addr6->sin6_scope_id = 0;
523 addr6->sin6_port = cpu_to_be16(CIFS_PORT);
524
525 cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__,
526 &addr6->sin6_addr);
527 break;
528 default:
529 cifs_dbg(VFS,
530 "%s: skipping unsupported socket family\n",
531 __func__);
532 goto next_iface;
533 }
534
535 (*iface_count)++;
536 info++;
537 next_iface:
538 next = le32_to_cpu(p->Next);
539 if (!next)
540 break;
541 p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next);
542 bytes_left -= next;
543 }
544
545 if (!*iface_count) {
546 rc = -EINVAL;
547 goto out;
548 }
549
550 out:
551 if (rc) {
552 kfree(*iface_list);
553 *iface_count = 0;
554 *iface_list = NULL;
555 }
556 return rc;
557 }
558
559
560 static int
561 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
562 {
563 int rc;
564 unsigned int ret_data_len = 0;
565 struct network_interface_info_ioctl_rsp *out_buf = NULL;
566 struct cifs_server_iface *iface_list;
567 size_t iface_count;
568 struct cifs_ses *ses = tcon->ses;
569
570 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
571 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
572 NULL /* no data input */, 0 /* no data input */,
573 CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
574 if (rc == -EOPNOTSUPP) {
575 cifs_dbg(FYI,
576 "server does not support query network interfaces\n");
577 goto out;
578 } else if (rc != 0) {
579 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
580 goto out;
581 }
582
583 rc = parse_server_interfaces(out_buf, ret_data_len,
584 &iface_list, &iface_count);
585 if (rc)
586 goto out;
587
588 spin_lock(&ses->iface_lock);
589 kfree(ses->iface_list);
590 ses->iface_list = iface_list;
591 ses->iface_count = iface_count;
592 ses->iface_last_update = jiffies;
593 spin_unlock(&ses->iface_lock);
594
595 out:
596 kfree(out_buf);
597 return rc;
598 }
599
600 static void
601 smb2_close_cached_fid(struct kref *ref)
602 {
603 struct cached_fid *cfid = container_of(ref, struct cached_fid,
604 refcount);
605
606 if (cfid->is_valid) {
607 cifs_dbg(FYI, "clear cached root file handle\n");
608 SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
609 cfid->fid->volatile_fid);
610 cfid->is_valid = false;
611 cfid->file_all_info_is_valid = false;
612 }
613 }
614
615 void close_shroot(struct cached_fid *cfid)
616 {
617 mutex_lock(&cfid->fid_mutex);
618 kref_put(&cfid->refcount, smb2_close_cached_fid);
619 mutex_unlock(&cfid->fid_mutex);
620 }
621
622 void
623 smb2_cached_lease_break(struct work_struct *work)
624 {
625 struct cached_fid *cfid = container_of(work,
626 struct cached_fid, lease_break);
627
628 close_shroot(cfid);
629 }
630
631 /*
632 * Open the directory at the root of a share
633 */
634 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
635 {
636 struct cifs_ses *ses = tcon->ses;
637 struct TCP_Server_Info *server = ses->server;
638 struct cifs_open_parms oparms;
639 struct smb2_create_rsp *o_rsp = NULL;
640 struct smb2_query_info_rsp *qi_rsp = NULL;
641 int resp_buftype[2];
642 struct smb_rqst rqst[2];
643 struct kvec rsp_iov[2];
644 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
645 struct kvec qi_iov[1];
646 int rc, flags = 0;
647 __le16 utf16_path = 0; /* Null - since an open of top of share */
648 u8 oplock = SMB2_OPLOCK_LEVEL_II;
649
650 mutex_lock(&tcon->crfid.fid_mutex);
651 if (tcon->crfid.is_valid) {
652 cifs_dbg(FYI, "found a cached root file handle\n");
653 memcpy(pfid, tcon->crfid.fid, sizeof(struct cifs_fid));
654 kref_get(&tcon->crfid.refcount);
655 mutex_unlock(&tcon->crfid.fid_mutex);
656 return 0;
657 }
658
659 if (smb3_encryption_required(tcon))
660 flags |= CIFS_TRANSFORM_REQ;
661
662 memset(rqst, 0, sizeof(rqst));
663 resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
664 memset(rsp_iov, 0, sizeof(rsp_iov));
665
666 /* Open */
667 memset(&open_iov, 0, sizeof(open_iov));
668 rqst[0].rq_iov = open_iov;
669 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
670
671 oparms.tcon = tcon;
672 oparms.create_options = 0;
673 oparms.desired_access = FILE_READ_ATTRIBUTES;
674 oparms.disposition = FILE_OPEN;
675 oparms.fid = pfid;
676 oparms.reconnect = false;
677
678 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
679 if (rc)
680 goto oshr_exit;
681 smb2_set_next_command(tcon, &rqst[0]);
682
683 memset(&qi_iov, 0, sizeof(qi_iov));
684 rqst[1].rq_iov = qi_iov;
685 rqst[1].rq_nvec = 1;
686
687 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
688 COMPOUND_FID, FILE_ALL_INFORMATION,
689 SMB2_O_INFO_FILE, 0,
690 sizeof(struct smb2_file_all_info) +
691 PATH_MAX * 2, 0, NULL);
692 if (rc)
693 goto oshr_exit;
694
695 smb2_set_related(&rqst[1]);
696
697 /*
698 * We do not hold the lock for the open because in case
699 * SMB2_open needs to reconnect, it will end up calling
700 * cifs_mark_open_files_invalid() which takes the lock again
701 * thus causing a deadlock
702 */
703
704 mutex_unlock(&tcon->crfid.fid_mutex);
705 rc = compound_send_recv(xid, ses, flags, 2, rqst,
706 resp_buftype, rsp_iov);
707 mutex_lock(&tcon->crfid.fid_mutex);
708
709 /*
710 * Now we need to check again as the cached root might have
711 * been successfully re-opened from a concurrent process
712 */
713
714 if (tcon->crfid.is_valid) {
715 /* work was already done */
716
717 /* stash fids for close() later */
718 struct cifs_fid fid = {
719 .persistent_fid = pfid->persistent_fid,
720 .volatile_fid = pfid->volatile_fid,
721 };
722
723 /*
724 * caller expects this func to set pfid to a valid
725 * cached root, so we copy the existing one and get a
726 * reference.
727 */
728 memcpy(pfid, tcon->crfid.fid, sizeof(*pfid));
729 kref_get(&tcon->crfid.refcount);
730
731 mutex_unlock(&tcon->crfid.fid_mutex);
732
733 if (rc == 0) {
734 /* close extra handle outside of crit sec */
735 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
736 }
737 goto oshr_free;
738 }
739
740 /* Cached root is still invalid, continue normaly */
741
742 if (rc)
743 goto oshr_exit;
744
745 o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
746 oparms.fid->persistent_fid = o_rsp->PersistentFileId;
747 oparms.fid->volatile_fid = o_rsp->VolatileFileId;
748 #ifdef CONFIG_CIFS_DEBUG2
749 oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
750 #endif /* CIFS_DEBUG2 */
751
752 memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
753 tcon->crfid.tcon = tcon;
754 tcon->crfid.is_valid = true;
755 kref_init(&tcon->crfid.refcount);
756
757 /* BB TBD check to see if oplock level check can be removed below */
758 if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
759 kref_get(&tcon->crfid.refcount);
760 smb2_parse_contexts(server, o_rsp,
761 &oparms.fid->epoch,
762 oparms.fid->lease_key, &oplock, NULL);
763 } else
764 goto oshr_exit;
765
766 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
767 if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
768 goto oshr_exit;
769 if (!smb2_validate_and_copy_iov(
770 le16_to_cpu(qi_rsp->OutputBufferOffset),
771 sizeof(struct smb2_file_all_info),
772 &rsp_iov[1], sizeof(struct smb2_file_all_info),
773 (char *)&tcon->crfid.file_all_info))
774 tcon->crfid.file_all_info_is_valid = 1;
775
776 oshr_exit:
777 mutex_unlock(&tcon->crfid.fid_mutex);
778 oshr_free:
779 SMB2_open_free(&rqst[0]);
780 SMB2_query_info_free(&rqst[1]);
781 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
782 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
783 return rc;
784 }
785
786 static void
787 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
788 {
789 int rc;
790 __le16 srch_path = 0; /* Null - open root of share */
791 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
792 struct cifs_open_parms oparms;
793 struct cifs_fid fid;
794 bool no_cached_open = tcon->nohandlecache;
795
796 oparms.tcon = tcon;
797 oparms.desired_access = FILE_READ_ATTRIBUTES;
798 oparms.disposition = FILE_OPEN;
799 oparms.create_options = 0;
800 oparms.fid = &fid;
801 oparms.reconnect = false;
802
803 if (no_cached_open)
804 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL,
805 NULL);
806 else
807 rc = open_shroot(xid, tcon, &fid);
808
809 if (rc)
810 return;
811
812 SMB3_request_interfaces(xid, tcon);
813
814 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
815 FS_ATTRIBUTE_INFORMATION);
816 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
817 FS_DEVICE_INFORMATION);
818 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
819 FS_VOLUME_INFORMATION);
820 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
821 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
822 if (no_cached_open)
823 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
824 else
825 close_shroot(&tcon->crfid);
826 }
827
828 static void
829 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
830 {
831 int rc;
832 __le16 srch_path = 0; /* Null - open root of share */
833 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
834 struct cifs_open_parms oparms;
835 struct cifs_fid fid;
836
837 oparms.tcon = tcon;
838 oparms.desired_access = FILE_READ_ATTRIBUTES;
839 oparms.disposition = FILE_OPEN;
840 oparms.create_options = 0;
841 oparms.fid = &fid;
842 oparms.reconnect = false;
843
844 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
845 if (rc)
846 return;
847
848 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
849 FS_ATTRIBUTE_INFORMATION);
850 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
851 FS_DEVICE_INFORMATION);
852 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
853 }
854
855 static int
856 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
857 struct cifs_sb_info *cifs_sb, const char *full_path)
858 {
859 int rc;
860 __le16 *utf16_path;
861 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
862 struct cifs_open_parms oparms;
863 struct cifs_fid fid;
864
865 if ((*full_path == 0) && tcon->crfid.is_valid)
866 return 0;
867
868 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
869 if (!utf16_path)
870 return -ENOMEM;
871
872 oparms.tcon = tcon;
873 oparms.desired_access = FILE_READ_ATTRIBUTES;
874 oparms.disposition = FILE_OPEN;
875 if (backup_cred(cifs_sb))
876 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
877 else
878 oparms.create_options = 0;
879 oparms.fid = &fid;
880 oparms.reconnect = false;
881
882 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
883 if (rc) {
884 kfree(utf16_path);
885 return rc;
886 }
887
888 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
889 kfree(utf16_path);
890 return rc;
891 }
892
893 static int
894 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
895 struct cifs_sb_info *cifs_sb, const char *full_path,
896 u64 *uniqueid, FILE_ALL_INFO *data)
897 {
898 *uniqueid = le64_to_cpu(data->IndexNumber);
899 return 0;
900 }
901
902 static int
903 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
904 struct cifs_fid *fid, FILE_ALL_INFO *data)
905 {
906 int rc;
907 struct smb2_file_all_info *smb2_data;
908
909 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
910 GFP_KERNEL);
911 if (smb2_data == NULL)
912 return -ENOMEM;
913
914 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
915 smb2_data);
916 if (!rc)
917 move_smb2_info_to_cifs(data, smb2_data);
918 kfree(smb2_data);
919 return rc;
920 }
921
922 #ifdef CONFIG_CIFS_XATTR
923 static ssize_t
924 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
925 struct smb2_file_full_ea_info *src, size_t src_size,
926 const unsigned char *ea_name)
927 {
928 int rc = 0;
929 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
930 char *name, *value;
931 size_t buf_size = dst_size;
932 size_t name_len, value_len, user_name_len;
933
934 while (src_size > 0) {
935 name = &src->ea_data[0];
936 name_len = (size_t)src->ea_name_length;
937 value = &src->ea_data[src->ea_name_length + 1];
938 value_len = (size_t)le16_to_cpu(src->ea_value_length);
939
940 if (name_len == 0)
941 break;
942
943 if (src_size < 8 + name_len + 1 + value_len) {
944 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
945 rc = -EIO;
946 goto out;
947 }
948
949 if (ea_name) {
950 if (ea_name_len == name_len &&
951 memcmp(ea_name, name, name_len) == 0) {
952 rc = value_len;
953 if (dst_size == 0)
954 goto out;
955 if (dst_size < value_len) {
956 rc = -ERANGE;
957 goto out;
958 }
959 memcpy(dst, value, value_len);
960 goto out;
961 }
962 } else {
963 /* 'user.' plus a terminating null */
964 user_name_len = 5 + 1 + name_len;
965
966 if (buf_size == 0) {
967 /* skip copy - calc size only */
968 rc += user_name_len;
969 } else if (dst_size >= user_name_len) {
970 dst_size -= user_name_len;
971 memcpy(dst, "user.", 5);
972 dst += 5;
973 memcpy(dst, src->ea_data, name_len);
974 dst += name_len;
975 *dst = 0;
976 ++dst;
977 rc += user_name_len;
978 } else {
979 /* stop before overrun buffer */
980 rc = -ERANGE;
981 break;
982 }
983 }
984
985 if (!src->next_entry_offset)
986 break;
987
988 if (src_size < le32_to_cpu(src->next_entry_offset)) {
989 /* stop before overrun buffer */
990 rc = -ERANGE;
991 break;
992 }
993 src_size -= le32_to_cpu(src->next_entry_offset);
994 src = (void *)((char *)src +
995 le32_to_cpu(src->next_entry_offset));
996 }
997
998 /* didn't find the named attribute */
999 if (ea_name)
1000 rc = -ENODATA;
1001
1002 out:
1003 return (ssize_t)rc;
1004 }
1005
1006 static ssize_t
1007 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
1008 const unsigned char *path, const unsigned char *ea_name,
1009 char *ea_data, size_t buf_size,
1010 struct cifs_sb_info *cifs_sb)
1011 {
1012 int rc;
1013 __le16 *utf16_path;
1014 struct kvec rsp_iov = {NULL, 0};
1015 int buftype = CIFS_NO_BUFFER;
1016 struct smb2_query_info_rsp *rsp;
1017 struct smb2_file_full_ea_info *info = NULL;
1018
1019 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1020 if (!utf16_path)
1021 return -ENOMEM;
1022
1023 rc = smb2_query_info_compound(xid, tcon, utf16_path,
1024 FILE_READ_EA,
1025 FILE_FULL_EA_INFORMATION,
1026 SMB2_O_INFO_FILE,
1027 CIFSMaxBufSize -
1028 MAX_SMB2_CREATE_RESPONSE_SIZE -
1029 MAX_SMB2_CLOSE_RESPONSE_SIZE,
1030 &rsp_iov, &buftype, cifs_sb);
1031 if (rc) {
1032 /*
1033 * If ea_name is NULL (listxattr) and there are no EAs,
1034 * return 0 as it's not an error. Otherwise, the specified
1035 * ea_name was not found.
1036 */
1037 if (!ea_name && rc == -ENODATA)
1038 rc = 0;
1039 goto qeas_exit;
1040 }
1041
1042 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
1043 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
1044 le32_to_cpu(rsp->OutputBufferLength),
1045 &rsp_iov,
1046 sizeof(struct smb2_file_full_ea_info));
1047 if (rc)
1048 goto qeas_exit;
1049
1050 info = (struct smb2_file_full_ea_info *)(
1051 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
1052 rc = move_smb2_ea_to_cifs(ea_data, buf_size, info,
1053 le32_to_cpu(rsp->OutputBufferLength), ea_name);
1054
1055 qeas_exit:
1056 kfree(utf16_path);
1057 free_rsp_buf(buftype, rsp_iov.iov_base);
1058 return rc;
1059 }
1060
1061
1062 static int
1063 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
1064 const char *path, const char *ea_name, const void *ea_value,
1065 const __u16 ea_value_len, const struct nls_table *nls_codepage,
1066 struct cifs_sb_info *cifs_sb)
1067 {
1068 struct cifs_ses *ses = tcon->ses;
1069 __le16 *utf16_path = NULL;
1070 int ea_name_len = strlen(ea_name);
1071 int flags = 0;
1072 int len;
1073 struct smb_rqst rqst[3];
1074 int resp_buftype[3];
1075 struct kvec rsp_iov[3];
1076 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1077 struct cifs_open_parms oparms;
1078 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1079 struct cifs_fid fid;
1080 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
1081 unsigned int size[1];
1082 void *data[1];
1083 struct smb2_file_full_ea_info *ea = NULL;
1084 struct kvec close_iov[1];
1085 int rc;
1086
1087 if (smb3_encryption_required(tcon))
1088 flags |= CIFS_TRANSFORM_REQ;
1089
1090 if (ea_name_len > 255)
1091 return -EINVAL;
1092
1093 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1094 if (!utf16_path)
1095 return -ENOMEM;
1096
1097 memset(rqst, 0, sizeof(rqst));
1098 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1099 memset(rsp_iov, 0, sizeof(rsp_iov));
1100
1101 if (ses->server->ops->query_all_EAs) {
1102 if (!ea_value) {
1103 rc = ses->server->ops->query_all_EAs(xid, tcon, path,
1104 ea_name, NULL, 0,
1105 cifs_sb);
1106 if (rc == -ENODATA)
1107 goto sea_exit;
1108 }
1109 }
1110
1111 /* Open */
1112 memset(&open_iov, 0, sizeof(open_iov));
1113 rqst[0].rq_iov = open_iov;
1114 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1115
1116 memset(&oparms, 0, sizeof(oparms));
1117 oparms.tcon = tcon;
1118 oparms.desired_access = FILE_WRITE_EA;
1119 oparms.disposition = FILE_OPEN;
1120 if (backup_cred(cifs_sb))
1121 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1122 else
1123 oparms.create_options = 0;
1124 oparms.fid = &fid;
1125 oparms.reconnect = false;
1126
1127 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
1128 if (rc)
1129 goto sea_exit;
1130 smb2_set_next_command(tcon, &rqst[0]);
1131
1132
1133 /* Set Info */
1134 memset(&si_iov, 0, sizeof(si_iov));
1135 rqst[1].rq_iov = si_iov;
1136 rqst[1].rq_nvec = 1;
1137
1138 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
1139 ea = kzalloc(len, GFP_KERNEL);
1140 if (ea == NULL) {
1141 rc = -ENOMEM;
1142 goto sea_exit;
1143 }
1144
1145 ea->ea_name_length = ea_name_len;
1146 ea->ea_value_length = cpu_to_le16(ea_value_len);
1147 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
1148 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
1149
1150 size[0] = len;
1151 data[0] = ea;
1152
1153 rc = SMB2_set_info_init(tcon, &rqst[1], COMPOUND_FID,
1154 COMPOUND_FID, current->tgid,
1155 FILE_FULL_EA_INFORMATION,
1156 SMB2_O_INFO_FILE, 0, data, size);
1157 smb2_set_next_command(tcon, &rqst[1]);
1158 smb2_set_related(&rqst[1]);
1159
1160
1161 /* Close */
1162 memset(&close_iov, 0, sizeof(close_iov));
1163 rqst[2].rq_iov = close_iov;
1164 rqst[2].rq_nvec = 1;
1165 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1166 smb2_set_related(&rqst[2]);
1167
1168 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1169 resp_buftype, rsp_iov);
1170
1171 sea_exit:
1172 kfree(ea);
1173 kfree(utf16_path);
1174 SMB2_open_free(&rqst[0]);
1175 SMB2_set_info_free(&rqst[1]);
1176 SMB2_close_free(&rqst[2]);
1177 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1178 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1179 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1180 return rc;
1181 }
1182 #endif
1183
1184 static bool
1185 smb2_can_echo(struct TCP_Server_Info *server)
1186 {
1187 return server->echoes;
1188 }
1189
1190 static void
1191 smb2_clear_stats(struct cifs_tcon *tcon)
1192 {
1193 int i;
1194
1195 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
1196 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
1197 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
1198 }
1199 }
1200
1201 static void
1202 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
1203 {
1204 seq_puts(m, "\n\tShare Capabilities:");
1205 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
1206 seq_puts(m, " DFS,");
1207 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
1208 seq_puts(m, " CONTINUOUS AVAILABILITY,");
1209 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
1210 seq_puts(m, " SCALEOUT,");
1211 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
1212 seq_puts(m, " CLUSTER,");
1213 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
1214 seq_puts(m, " ASYMMETRIC,");
1215 if (tcon->capabilities == 0)
1216 seq_puts(m, " None");
1217 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
1218 seq_puts(m, " Aligned,");
1219 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
1220 seq_puts(m, " Partition Aligned,");
1221 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
1222 seq_puts(m, " SSD,");
1223 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
1224 seq_puts(m, " TRIM-support,");
1225
1226 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
1227 seq_printf(m, "\n\ttid: 0x%x", tcon->tid);
1228 if (tcon->perf_sector_size)
1229 seq_printf(m, "\tOptimal sector size: 0x%x",
1230 tcon->perf_sector_size);
1231 seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access);
1232 }
1233
1234 static void
1235 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
1236 {
1237 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
1238 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
1239
1240 /*
1241 * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO
1242 * totals (requests sent) since those SMBs are per-session not per tcon
1243 */
1244 seq_printf(m, "\nBytes read: %llu Bytes written: %llu",
1245 (long long)(tcon->bytes_read),
1246 (long long)(tcon->bytes_written));
1247 seq_printf(m, "\nOpen files: %d total (local), %d open on server",
1248 atomic_read(&tcon->num_local_opens),
1249 atomic_read(&tcon->num_remote_opens));
1250 seq_printf(m, "\nTreeConnects: %d total %d failed",
1251 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
1252 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
1253 seq_printf(m, "\nTreeDisconnects: %d total %d failed",
1254 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
1255 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
1256 seq_printf(m, "\nCreates: %d total %d failed",
1257 atomic_read(&sent[SMB2_CREATE_HE]),
1258 atomic_read(&failed[SMB2_CREATE_HE]));
1259 seq_printf(m, "\nCloses: %d total %d failed",
1260 atomic_read(&sent[SMB2_CLOSE_HE]),
1261 atomic_read(&failed[SMB2_CLOSE_HE]));
1262 seq_printf(m, "\nFlushes: %d total %d failed",
1263 atomic_read(&sent[SMB2_FLUSH_HE]),
1264 atomic_read(&failed[SMB2_FLUSH_HE]));
1265 seq_printf(m, "\nReads: %d total %d failed",
1266 atomic_read(&sent[SMB2_READ_HE]),
1267 atomic_read(&failed[SMB2_READ_HE]));
1268 seq_printf(m, "\nWrites: %d total %d failed",
1269 atomic_read(&sent[SMB2_WRITE_HE]),
1270 atomic_read(&failed[SMB2_WRITE_HE]));
1271 seq_printf(m, "\nLocks: %d total %d failed",
1272 atomic_read(&sent[SMB2_LOCK_HE]),
1273 atomic_read(&failed[SMB2_LOCK_HE]));
1274 seq_printf(m, "\nIOCTLs: %d total %d failed",
1275 atomic_read(&sent[SMB2_IOCTL_HE]),
1276 atomic_read(&failed[SMB2_IOCTL_HE]));
1277 seq_printf(m, "\nQueryDirectories: %d total %d failed",
1278 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
1279 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
1280 seq_printf(m, "\nChangeNotifies: %d total %d failed",
1281 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
1282 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
1283 seq_printf(m, "\nQueryInfos: %d total %d failed",
1284 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
1285 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
1286 seq_printf(m, "\nSetInfos: %d total %d failed",
1287 atomic_read(&sent[SMB2_SET_INFO_HE]),
1288 atomic_read(&failed[SMB2_SET_INFO_HE]));
1289 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
1290 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
1291 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
1292 }
1293
1294 static void
1295 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
1296 {
1297 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
1298 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
1299
1300 cfile->fid.persistent_fid = fid->persistent_fid;
1301 cfile->fid.volatile_fid = fid->volatile_fid;
1302 #ifdef CONFIG_CIFS_DEBUG2
1303 cfile->fid.mid = fid->mid;
1304 #endif /* CIFS_DEBUG2 */
1305 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
1306 &fid->purge_cache);
1307 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
1308 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
1309 }
1310
1311 static void
1312 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
1313 struct cifs_fid *fid)
1314 {
1315 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1316 }
1317
1318 static int
1319 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
1320 u64 persistent_fid, u64 volatile_fid,
1321 struct copychunk_ioctl *pcchunk)
1322 {
1323 int rc;
1324 unsigned int ret_data_len;
1325 struct resume_key_req *res_key;
1326
1327 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
1328 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
1329 NULL, 0 /* no input */, CIFSMaxBufSize,
1330 (char **)&res_key, &ret_data_len);
1331
1332 if (rc) {
1333 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
1334 goto req_res_key_exit;
1335 }
1336 if (ret_data_len < sizeof(struct resume_key_req)) {
1337 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
1338 rc = -EINVAL;
1339 goto req_res_key_exit;
1340 }
1341 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
1342
1343 req_res_key_exit:
1344 kfree(res_key);
1345 return rc;
1346 }
1347
1348 static int
1349 smb2_ioctl_query_info(const unsigned int xid,
1350 struct cifs_tcon *tcon,
1351 __le16 *path, int is_dir,
1352 unsigned long p)
1353 {
1354 struct cifs_ses *ses = tcon->ses;
1355 char __user *arg = (char __user *)p;
1356 struct smb_query_info qi;
1357 struct smb_query_info __user *pqi;
1358 int rc = 0;
1359 int flags = 0;
1360 struct smb2_query_info_rsp *qi_rsp = NULL;
1361 struct smb2_ioctl_rsp *io_rsp = NULL;
1362 void *buffer = NULL;
1363 struct smb_rqst rqst[3];
1364 int resp_buftype[3];
1365 struct kvec rsp_iov[3];
1366 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
1367 struct cifs_open_parms oparms;
1368 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1369 struct cifs_fid fid;
1370 struct kvec qi_iov[1];
1371 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
1372 struct kvec close_iov[1];
1373
1374 memset(rqst, 0, sizeof(rqst));
1375 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
1376 memset(rsp_iov, 0, sizeof(rsp_iov));
1377
1378 if (copy_from_user(&qi, arg, sizeof(struct smb_query_info)))
1379 return -EFAULT;
1380
1381 if (qi.output_buffer_length > 1024)
1382 return -EINVAL;
1383
1384 if (!ses || !(ses->server))
1385 return -EIO;
1386
1387 if (smb3_encryption_required(tcon))
1388 flags |= CIFS_TRANSFORM_REQ;
1389
1390 buffer = kmalloc(qi.output_buffer_length, GFP_KERNEL);
1391 if (buffer == NULL)
1392 return -ENOMEM;
1393
1394 if (copy_from_user(buffer, arg + sizeof(struct smb_query_info),
1395 qi.output_buffer_length)) {
1396 rc = -EFAULT;
1397 goto iqinf_exit;
1398 }
1399
1400 /* Open */
1401 memset(&open_iov, 0, sizeof(open_iov));
1402 rqst[0].rq_iov = open_iov;
1403 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
1404
1405 memset(&oparms, 0, sizeof(oparms));
1406 oparms.tcon = tcon;
1407 oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL;
1408 oparms.disposition = FILE_OPEN;
1409 if (is_dir)
1410 oparms.create_options = CREATE_NOT_FILE;
1411 else
1412 oparms.create_options = CREATE_NOT_DIR;
1413 oparms.fid = &fid;
1414 oparms.reconnect = false;
1415
1416 /*
1417 * FSCTL codes encode the special access they need in the fsctl code.
1418 */
1419 if (qi.flags & PASSTHRU_FSCTL) {
1420 switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
1421 case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
1422 oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
1423 break;
1424 case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
1425 oparms.desired_access = GENERIC_ALL;
1426 break;
1427 case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
1428 oparms.desired_access = GENERIC_READ;
1429 break;
1430 case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
1431 oparms.desired_access = GENERIC_WRITE;
1432 break;
1433 }
1434 }
1435
1436 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
1437 if (rc)
1438 goto iqinf_exit;
1439 smb2_set_next_command(tcon, &rqst[0]);
1440
1441 /* Query */
1442 if (qi.flags & PASSTHRU_FSCTL) {
1443 /* Can eventually relax perm check since server enforces too */
1444 if (!capable(CAP_SYS_ADMIN))
1445 rc = -EPERM;
1446 else {
1447 memset(&io_iov, 0, sizeof(io_iov));
1448 rqst[1].rq_iov = io_iov;
1449 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
1450
1451 rc = SMB2_ioctl_init(tcon, &rqst[1],
1452 COMPOUND_FID, COMPOUND_FID,
1453 qi.info_type, true, buffer,
1454 qi.output_buffer_length,
1455 CIFSMaxBufSize);
1456 }
1457 } else if (qi.flags == PASSTHRU_QUERY_INFO) {
1458 memset(&qi_iov, 0, sizeof(qi_iov));
1459 rqst[1].rq_iov = qi_iov;
1460 rqst[1].rq_nvec = 1;
1461
1462 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
1463 COMPOUND_FID, qi.file_info_class,
1464 qi.info_type, qi.additional_information,
1465 qi.input_buffer_length,
1466 qi.output_buffer_length, buffer);
1467 } else { /* unknown flags */
1468 cifs_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
1469 rc = -EINVAL;
1470 }
1471
1472 if (rc)
1473 goto iqinf_exit;
1474 smb2_set_next_command(tcon, &rqst[1]);
1475 smb2_set_related(&rqst[1]);
1476
1477 /* Close */
1478 memset(&close_iov, 0, sizeof(close_iov));
1479 rqst[2].rq_iov = close_iov;
1480 rqst[2].rq_nvec = 1;
1481
1482 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
1483 if (rc)
1484 goto iqinf_exit;
1485 smb2_set_related(&rqst[2]);
1486
1487 rc = compound_send_recv(xid, ses, flags, 3, rqst,
1488 resp_buftype, rsp_iov);
1489 if (rc)
1490 goto iqinf_exit;
1491 if (qi.flags & PASSTHRU_FSCTL) {
1492 pqi = (struct smb_query_info __user *)arg;
1493 io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
1494 if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
1495 qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
1496 if (qi.input_buffer_length > 0 &&
1497 le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length > rsp_iov[1].iov_len) {
1498 rc = -EFAULT;
1499 goto iqinf_exit;
1500 }
1501 if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1502 sizeof(qi.input_buffer_length))) {
1503 rc = -EFAULT;
1504 goto iqinf_exit;
1505 }
1506 if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
1507 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
1508 qi.input_buffer_length)) {
1509 rc = -EFAULT;
1510 goto iqinf_exit;
1511 }
1512 } else {
1513 pqi = (struct smb_query_info __user *)arg;
1514 qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
1515 if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
1516 qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
1517 if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
1518 sizeof(qi.input_buffer_length))) {
1519 rc = -EFAULT;
1520 goto iqinf_exit;
1521 }
1522 if (copy_to_user(pqi + 1, qi_rsp->Buffer, qi.input_buffer_length)) {
1523 rc = -EFAULT;
1524 goto iqinf_exit;
1525 }
1526 }
1527
1528 iqinf_exit:
1529 kfree(buffer);
1530 SMB2_open_free(&rqst[0]);
1531 if (qi.flags & PASSTHRU_FSCTL)
1532 SMB2_ioctl_free(&rqst[1]);
1533 else
1534 SMB2_query_info_free(&rqst[1]);
1535
1536 SMB2_close_free(&rqst[2]);
1537 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
1538 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
1539 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
1540 return rc;
1541 }
1542
1543 static ssize_t
1544 smb2_copychunk_range(const unsigned int xid,
1545 struct cifsFileInfo *srcfile,
1546 struct cifsFileInfo *trgtfile, u64 src_off,
1547 u64 len, u64 dest_off)
1548 {
1549 int rc;
1550 unsigned int ret_data_len;
1551 struct copychunk_ioctl *pcchunk;
1552 struct copychunk_ioctl_rsp *retbuf = NULL;
1553 struct cifs_tcon *tcon;
1554 int chunks_copied = 0;
1555 bool chunk_sizes_updated = false;
1556 ssize_t bytes_written, total_bytes_written = 0;
1557
1558 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
1559
1560 if (pcchunk == NULL)
1561 return -ENOMEM;
1562
1563 cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
1564 /* Request a key from the server to identify the source of the copy */
1565 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
1566 srcfile->fid.persistent_fid,
1567 srcfile->fid.volatile_fid, pcchunk);
1568
1569 /* Note: request_res_key sets res_key null only if rc !=0 */
1570 if (rc)
1571 goto cchunk_out;
1572
1573 /* For now array only one chunk long, will make more flexible later */
1574 pcchunk->ChunkCount = cpu_to_le32(1);
1575 pcchunk->Reserved = 0;
1576 pcchunk->Reserved2 = 0;
1577
1578 tcon = tlink_tcon(trgtfile->tlink);
1579
1580 while (len > 0) {
1581 pcchunk->SourceOffset = cpu_to_le64(src_off);
1582 pcchunk->TargetOffset = cpu_to_le64(dest_off);
1583 pcchunk->Length =
1584 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
1585
1586 /* Request server copy to target from src identified by key */
1587 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1588 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
1589 true /* is_fsctl */, (char *)pcchunk,
1590 sizeof(struct copychunk_ioctl), CIFSMaxBufSize,
1591 (char **)&retbuf, &ret_data_len);
1592 if (rc == 0) {
1593 if (ret_data_len !=
1594 sizeof(struct copychunk_ioctl_rsp)) {
1595 cifs_dbg(VFS, "invalid cchunk response size\n");
1596 rc = -EIO;
1597 goto cchunk_out;
1598 }
1599 if (retbuf->TotalBytesWritten == 0) {
1600 cifs_dbg(FYI, "no bytes copied\n");
1601 rc = -EIO;
1602 goto cchunk_out;
1603 }
1604 /*
1605 * Check if server claimed to write more than we asked
1606 */
1607 if (le32_to_cpu(retbuf->TotalBytesWritten) >
1608 le32_to_cpu(pcchunk->Length)) {
1609 cifs_dbg(VFS, "invalid copy chunk response\n");
1610 rc = -EIO;
1611 goto cchunk_out;
1612 }
1613 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
1614 cifs_dbg(VFS, "invalid num chunks written\n");
1615 rc = -EIO;
1616 goto cchunk_out;
1617 }
1618 chunks_copied++;
1619
1620 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
1621 src_off += bytes_written;
1622 dest_off += bytes_written;
1623 len -= bytes_written;
1624 total_bytes_written += bytes_written;
1625
1626 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
1627 le32_to_cpu(retbuf->ChunksWritten),
1628 le32_to_cpu(retbuf->ChunkBytesWritten),
1629 bytes_written);
1630 } else if (rc == -EINVAL) {
1631 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
1632 goto cchunk_out;
1633
1634 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
1635 le32_to_cpu(retbuf->ChunksWritten),
1636 le32_to_cpu(retbuf->ChunkBytesWritten),
1637 le32_to_cpu(retbuf->TotalBytesWritten));
1638
1639 /*
1640 * Check if this is the first request using these sizes,
1641 * (ie check if copy succeed once with original sizes
1642 * and check if the server gave us different sizes after
1643 * we already updated max sizes on previous request).
1644 * if not then why is the server returning an error now
1645 */
1646 if ((chunks_copied != 0) || chunk_sizes_updated)
1647 goto cchunk_out;
1648
1649 /* Check that server is not asking us to grow size */
1650 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
1651 tcon->max_bytes_chunk)
1652 tcon->max_bytes_chunk =
1653 le32_to_cpu(retbuf->ChunkBytesWritten);
1654 else
1655 goto cchunk_out; /* server gave us bogus size */
1656
1657 /* No need to change MaxChunks since already set to 1 */
1658 chunk_sizes_updated = true;
1659 } else
1660 goto cchunk_out;
1661 }
1662
1663 cchunk_out:
1664 kfree(pcchunk);
1665 kfree(retbuf);
1666 if (rc)
1667 return rc;
1668 else
1669 return total_bytes_written;
1670 }
1671
1672 static int
1673 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
1674 struct cifs_fid *fid)
1675 {
1676 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1677 }
1678
1679 static unsigned int
1680 smb2_read_data_offset(char *buf)
1681 {
1682 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1683
1684 return rsp->DataOffset;
1685 }
1686
1687 static unsigned int
1688 smb2_read_data_length(char *buf, bool in_remaining)
1689 {
1690 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
1691
1692 if (in_remaining)
1693 return le32_to_cpu(rsp->DataRemaining);
1694
1695 return le32_to_cpu(rsp->DataLength);
1696 }
1697
1698
1699 static int
1700 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
1701 struct cifs_io_parms *parms, unsigned int *bytes_read,
1702 char **buf, int *buf_type)
1703 {
1704 parms->persistent_fid = pfid->persistent_fid;
1705 parms->volatile_fid = pfid->volatile_fid;
1706 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
1707 }
1708
1709 static int
1710 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
1711 struct cifs_io_parms *parms, unsigned int *written,
1712 struct kvec *iov, unsigned long nr_segs)
1713 {
1714
1715 parms->persistent_fid = pfid->persistent_fid;
1716 parms->volatile_fid = pfid->volatile_fid;
1717 return SMB2_write(xid, parms, written, iov, nr_segs);
1718 }
1719
1720 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1721 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1722 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1723 {
1724 struct cifsInodeInfo *cifsi;
1725 int rc;
1726
1727 cifsi = CIFS_I(inode);
1728
1729 /* if file already sparse don't bother setting sparse again */
1730 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1731 return true; /* already sparse */
1732
1733 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1734 return true; /* already not sparse */
1735
1736 /*
1737 * Can't check for sparse support on share the usual way via the
1738 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1739 * since Samba server doesn't set the flag on the share, yet
1740 * supports the set sparse FSCTL and returns sparse correctly
1741 * in the file attributes. If we fail setting sparse though we
1742 * mark that server does not support sparse files for this share
1743 * to avoid repeatedly sending the unsupported fsctl to server
1744 * if the file is repeatedly extended.
1745 */
1746 if (tcon->broken_sparse_sup)
1747 return false;
1748
1749 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1750 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1751 true /* is_fctl */,
1752 &setsparse, 1, CIFSMaxBufSize, NULL, NULL);
1753 if (rc) {
1754 tcon->broken_sparse_sup = true;
1755 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1756 return false;
1757 }
1758
1759 if (setsparse)
1760 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1761 else
1762 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1763
1764 return true;
1765 }
1766
1767 static int
1768 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1769 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1770 {
1771 __le64 eof = cpu_to_le64(size);
1772 struct inode *inode;
1773
1774 /*
1775 * If extending file more than one page make sparse. Many Linux fs
1776 * make files sparse by default when extending via ftruncate
1777 */
1778 inode = d_inode(cfile->dentry);
1779
1780 if (!set_alloc && (size > inode->i_size + 8192)) {
1781 __u8 set_sparse = 1;
1782
1783 /* whether set sparse succeeds or not, extend the file */
1784 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1785 }
1786
1787 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1788 cfile->fid.volatile_fid, cfile->pid, &eof);
1789 }
1790
1791 static int
1792 smb2_duplicate_extents(const unsigned int xid,
1793 struct cifsFileInfo *srcfile,
1794 struct cifsFileInfo *trgtfile, u64 src_off,
1795 u64 len, u64 dest_off)
1796 {
1797 int rc;
1798 unsigned int ret_data_len;
1799 struct duplicate_extents_to_file dup_ext_buf;
1800 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1801
1802 /* server fileays advertise duplicate extent support with this flag */
1803 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1804 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1805 return -EOPNOTSUPP;
1806
1807 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1808 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1809 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1810 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1811 dup_ext_buf.ByteCount = cpu_to_le64(len);
1812 cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
1813 src_off, dest_off, len);
1814
1815 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1816 if (rc)
1817 goto duplicate_extents_out;
1818
1819 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1820 trgtfile->fid.volatile_fid,
1821 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1822 true /* is_fsctl */,
1823 (char *)&dup_ext_buf,
1824 sizeof(struct duplicate_extents_to_file),
1825 CIFSMaxBufSize, NULL,
1826 &ret_data_len);
1827
1828 if (ret_data_len > 0)
1829 cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
1830
1831 duplicate_extents_out:
1832 return rc;
1833 }
1834
1835 static int
1836 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1837 struct cifsFileInfo *cfile)
1838 {
1839 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1840 cfile->fid.volatile_fid);
1841 }
1842
1843 static int
1844 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1845 struct cifsFileInfo *cfile)
1846 {
1847 struct fsctl_set_integrity_information_req integr_info;
1848 unsigned int ret_data_len;
1849
1850 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1851 integr_info.Flags = 0;
1852 integr_info.Reserved = 0;
1853
1854 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1855 cfile->fid.volatile_fid,
1856 FSCTL_SET_INTEGRITY_INFORMATION,
1857 true /* is_fsctl */,
1858 (char *)&integr_info,
1859 sizeof(struct fsctl_set_integrity_information_req),
1860 CIFSMaxBufSize, NULL,
1861 &ret_data_len);
1862
1863 }
1864
1865 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
1866 #define GMT_TOKEN_SIZE 50
1867
1868 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
1869
1870 /*
1871 * Input buffer contains (empty) struct smb_snapshot array with size filled in
1872 * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
1873 */
1874 static int
1875 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1876 struct cifsFileInfo *cfile, void __user *ioc_buf)
1877 {
1878 char *retbuf = NULL;
1879 unsigned int ret_data_len = 0;
1880 int rc;
1881 u32 max_response_size;
1882 struct smb_snapshot_array snapshot_in;
1883
1884 /*
1885 * On the first query to enumerate the list of snapshots available
1886 * for this volume the buffer begins with 0 (number of snapshots
1887 * which can be returned is zero since at that point we do not know
1888 * how big the buffer needs to be). On the second query,
1889 * it (ret_data_len) is set to number of snapshots so we can
1890 * know to set the maximum response size larger (see below).
1891 */
1892 if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
1893 return -EFAULT;
1894
1895 /*
1896 * Note that for snapshot queries that servers like Azure expect that
1897 * the first query be minimal size (and just used to get the number/size
1898 * of previous versions) so response size must be specified as EXACTLY
1899 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
1900 * of eight bytes.
1901 */
1902 if (ret_data_len == 0)
1903 max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
1904 else
1905 max_response_size = CIFSMaxBufSize;
1906
1907 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1908 cfile->fid.volatile_fid,
1909 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1910 true /* is_fsctl */,
1911 NULL, 0 /* no input data */, max_response_size,
1912 (char **)&retbuf,
1913 &ret_data_len);
1914 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1915 rc, ret_data_len);
1916 if (rc)
1917 return rc;
1918
1919 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1920 /* Fixup buffer */
1921 if (copy_from_user(&snapshot_in, ioc_buf,
1922 sizeof(struct smb_snapshot_array))) {
1923 rc = -EFAULT;
1924 kfree(retbuf);
1925 return rc;
1926 }
1927
1928 /*
1929 * Check for min size, ie not large enough to fit even one GMT
1930 * token (snapshot). On the first ioctl some users may pass in
1931 * smaller size (or zero) to simply get the size of the array
1932 * so the user space caller can allocate sufficient memory
1933 * and retry the ioctl again with larger array size sufficient
1934 * to hold all of the snapshot GMT tokens on the second try.
1935 */
1936 if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE)
1937 ret_data_len = sizeof(struct smb_snapshot_array);
1938
1939 /*
1940 * We return struct SRV_SNAPSHOT_ARRAY, followed by
1941 * the snapshot array (of 50 byte GMT tokens) each
1942 * representing an available previous version of the data
1943 */
1944 if (ret_data_len > (snapshot_in.snapshot_array_size +
1945 sizeof(struct smb_snapshot_array)))
1946 ret_data_len = snapshot_in.snapshot_array_size +
1947 sizeof(struct smb_snapshot_array);
1948
1949 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1950 rc = -EFAULT;
1951 }
1952
1953 kfree(retbuf);
1954 return rc;
1955 }
1956
1957 static int
1958 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1959 const char *path, struct cifs_sb_info *cifs_sb,
1960 struct cifs_fid *fid, __u16 search_flags,
1961 struct cifs_search_info *srch_inf)
1962 {
1963 __le16 *utf16_path;
1964 int rc;
1965 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1966 struct cifs_open_parms oparms;
1967
1968 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1969 if (!utf16_path)
1970 return -ENOMEM;
1971
1972 oparms.tcon = tcon;
1973 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1974 oparms.disposition = FILE_OPEN;
1975 if (backup_cred(cifs_sb))
1976 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1977 else
1978 oparms.create_options = 0;
1979 oparms.fid = fid;
1980 oparms.reconnect = false;
1981
1982 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
1983 kfree(utf16_path);
1984 if (rc) {
1985 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1986 return rc;
1987 }
1988
1989 srch_inf->entries_in_buffer = 0;
1990 srch_inf->index_of_last_entry = 2;
1991
1992 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1993 fid->volatile_fid, 0, srch_inf);
1994 if (rc) {
1995 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1996 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1997 }
1998 return rc;
1999 }
2000
2001 static int
2002 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
2003 struct cifs_fid *fid, __u16 search_flags,
2004 struct cifs_search_info *srch_inf)
2005 {
2006 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
2007 fid->volatile_fid, 0, srch_inf);
2008 }
2009
2010 static int
2011 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
2012 struct cifs_fid *fid)
2013 {
2014 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
2015 }
2016
2017 /*
2018 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
2019 * the number of credits and return true. Otherwise - return false.
2020 */
2021 static bool
2022 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
2023 {
2024 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2025
2026 if (shdr->Status != STATUS_PENDING)
2027 return false;
2028
2029 if (shdr->CreditRequest) {
2030 spin_lock(&server->req_lock);
2031 server->credits += le16_to_cpu(shdr->CreditRequest);
2032 spin_unlock(&server->req_lock);
2033 wake_up(&server->request_q);
2034 }
2035
2036 return true;
2037 }
2038
2039 static bool
2040 smb2_is_session_expired(char *buf)
2041 {
2042 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
2043
2044 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED &&
2045 shdr->Status != STATUS_USER_SESSION_DELETED)
2046 return false;
2047
2048 trace_smb3_ses_expired(shdr->TreeId, shdr->SessionId,
2049 le16_to_cpu(shdr->Command),
2050 le64_to_cpu(shdr->MessageId));
2051 cifs_dbg(FYI, "Session expired or deleted\n");
2052
2053 return true;
2054 }
2055
2056 static int
2057 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
2058 struct cifsInodeInfo *cinode)
2059 {
2060 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
2061 return SMB2_lease_break(0, tcon, cinode->lease_key,
2062 smb2_get_lease_state(cinode));
2063
2064 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
2065 fid->volatile_fid,
2066 CIFS_CACHE_READ(cinode) ? 1 : 0);
2067 }
2068
2069 void
2070 smb2_set_related(struct smb_rqst *rqst)
2071 {
2072 struct smb2_sync_hdr *shdr;
2073
2074 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2075 if (shdr == NULL) {
2076 cifs_dbg(FYI, "shdr NULL in smb2_set_related\n");
2077 return;
2078 }
2079 shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS;
2080 }
2081
2082 char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0};
2083
2084 void
2085 smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst)
2086 {
2087 struct smb2_sync_hdr *shdr;
2088 struct cifs_ses *ses = tcon->ses;
2089 struct TCP_Server_Info *server = ses->server;
2090 unsigned long len = smb_rqst_len(server, rqst);
2091 int i, num_padding;
2092
2093 shdr = (struct smb2_sync_hdr *)(rqst->rq_iov[0].iov_base);
2094 if (shdr == NULL) {
2095 cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n");
2096 return;
2097 }
2098
2099 /* SMB headers in a compound are 8 byte aligned. */
2100
2101 /* No padding needed */
2102 if (!(len & 7))
2103 goto finished;
2104
2105 num_padding = 8 - (len & 7);
2106 if (!smb3_encryption_required(tcon)) {
2107 /*
2108 * If we do not have encryption then we can just add an extra
2109 * iov for the padding.
2110 */
2111 rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding;
2112 rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding;
2113 rqst->rq_nvec++;
2114 len += num_padding;
2115 } else {
2116 /*
2117 * We can not add a small padding iov for the encryption case
2118 * because the encryption framework can not handle the padding
2119 * iovs.
2120 * We have to flatten this into a single buffer and add
2121 * the padding to it.
2122 */
2123 for (i = 1; i < rqst->rq_nvec; i++) {
2124 memcpy(rqst->rq_iov[0].iov_base +
2125 rqst->rq_iov[0].iov_len,
2126 rqst->rq_iov[i].iov_base,
2127 rqst->rq_iov[i].iov_len);
2128 rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len;
2129 }
2130 memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len,
2131 0, num_padding);
2132 rqst->rq_iov[0].iov_len += num_padding;
2133 len += num_padding;
2134 rqst->rq_nvec = 1;
2135 }
2136
2137 finished:
2138 shdr->NextCommand = cpu_to_le32(len);
2139 }
2140
2141 /*
2142 * Passes the query info response back to the caller on success.
2143 * Caller need to free this with free_rsp_buf().
2144 */
2145 int
2146 smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon,
2147 __le16 *utf16_path, u32 desired_access,
2148 u32 class, u32 type, u32 output_len,
2149 struct kvec *rsp, int *buftype,
2150 struct cifs_sb_info *cifs_sb)
2151 {
2152 struct cifs_ses *ses = tcon->ses;
2153 int flags = 0;
2154 struct smb_rqst rqst[3];
2155 int resp_buftype[3];
2156 struct kvec rsp_iov[3];
2157 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2158 struct kvec qi_iov[1];
2159 struct kvec close_iov[1];
2160 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2161 struct cifs_open_parms oparms;
2162 struct cifs_fid fid;
2163 int rc;
2164
2165 if (smb3_encryption_required(tcon))
2166 flags |= CIFS_TRANSFORM_REQ;
2167
2168 memset(rqst, 0, sizeof(rqst));
2169 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2170 memset(rsp_iov, 0, sizeof(rsp_iov));
2171
2172 memset(&open_iov, 0, sizeof(open_iov));
2173 rqst[0].rq_iov = open_iov;
2174 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2175
2176 oparms.tcon = tcon;
2177 oparms.desired_access = desired_access;
2178 oparms.disposition = FILE_OPEN;
2179 if (cifs_sb && backup_cred(cifs_sb))
2180 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2181 else
2182 oparms.create_options = 0;
2183 oparms.fid = &fid;
2184 oparms.reconnect = false;
2185
2186 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2187 if (rc)
2188 goto qic_exit;
2189 smb2_set_next_command(tcon, &rqst[0]);
2190
2191 memset(&qi_iov, 0, sizeof(qi_iov));
2192 rqst[1].rq_iov = qi_iov;
2193 rqst[1].rq_nvec = 1;
2194
2195 rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
2196 class, type, 0,
2197 output_len, 0,
2198 NULL);
2199 if (rc)
2200 goto qic_exit;
2201 smb2_set_next_command(tcon, &rqst[1]);
2202 smb2_set_related(&rqst[1]);
2203
2204 memset(&close_iov, 0, sizeof(close_iov));
2205 rqst[2].rq_iov = close_iov;
2206 rqst[2].rq_nvec = 1;
2207
2208 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
2209 if (rc)
2210 goto qic_exit;
2211 smb2_set_related(&rqst[2]);
2212
2213 rc = compound_send_recv(xid, ses, flags, 3, rqst,
2214 resp_buftype, rsp_iov);
2215 if (rc) {
2216 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2217 goto qic_exit;
2218 }
2219 *rsp = rsp_iov[1];
2220 *buftype = resp_buftype[1];
2221
2222 qic_exit:
2223 SMB2_open_free(&rqst[0]);
2224 SMB2_query_info_free(&rqst[1]);
2225 SMB2_close_free(&rqst[2]);
2226 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2227 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2228 return rc;
2229 }
2230
2231 static int
2232 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2233 struct kstatfs *buf)
2234 {
2235 struct smb2_query_info_rsp *rsp;
2236 struct smb2_fs_full_size_info *info = NULL;
2237 __le16 utf16_path = 0; /* Null - open root of share */
2238 struct kvec rsp_iov = {NULL, 0};
2239 int buftype = CIFS_NO_BUFFER;
2240 int rc;
2241
2242
2243 rc = smb2_query_info_compound(xid, tcon, &utf16_path,
2244 FILE_READ_ATTRIBUTES,
2245 FS_FULL_SIZE_INFORMATION,
2246 SMB2_O_INFO_FILESYSTEM,
2247 sizeof(struct smb2_fs_full_size_info),
2248 &rsp_iov, &buftype, NULL);
2249 if (rc)
2250 goto qfs_exit;
2251
2252 rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
2253 buf->f_type = SMB2_MAGIC_NUMBER;
2254 info = (struct smb2_fs_full_size_info *)(
2255 le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp);
2256 rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
2257 le32_to_cpu(rsp->OutputBufferLength),
2258 &rsp_iov,
2259 sizeof(struct smb2_fs_full_size_info));
2260 if (!rc)
2261 smb2_copy_fs_info_to_kstatfs(info, buf);
2262
2263 qfs_exit:
2264 free_rsp_buf(buftype, rsp_iov.iov_base);
2265 return rc;
2266 }
2267
2268 static int
2269 smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
2270 struct kstatfs *buf)
2271 {
2272 int rc;
2273 __le16 srch_path = 0; /* Null - open root of share */
2274 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2275 struct cifs_open_parms oparms;
2276 struct cifs_fid fid;
2277
2278 if (!tcon->posix_extensions)
2279 return smb2_queryfs(xid, tcon, buf);
2280
2281 oparms.tcon = tcon;
2282 oparms.desired_access = FILE_READ_ATTRIBUTES;
2283 oparms.disposition = FILE_OPEN;
2284 oparms.create_options = 0;
2285 oparms.fid = &fid;
2286 oparms.reconnect = false;
2287
2288 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL);
2289 if (rc)
2290 return rc;
2291
2292 rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid,
2293 fid.volatile_fid, buf);
2294 buf->f_type = SMB2_MAGIC_NUMBER;
2295 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2296 return rc;
2297 }
2298
2299 static bool
2300 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
2301 {
2302 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
2303 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
2304 }
2305
2306 static int
2307 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
2308 __u64 length, __u32 type, int lock, int unlock, bool wait)
2309 {
2310 if (unlock && !lock)
2311 type = SMB2_LOCKFLAG_UNLOCK;
2312 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
2313 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
2314 current->tgid, length, offset, type, wait);
2315 }
2316
2317 static void
2318 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
2319 {
2320 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
2321 }
2322
2323 static void
2324 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
2325 {
2326 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
2327 }
2328
2329 static void
2330 smb2_new_lease_key(struct cifs_fid *fid)
2331 {
2332 generate_random_uuid(fid->lease_key);
2333 }
2334
2335 static int
2336 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
2337 const char *search_name,
2338 struct dfs_info3_param **target_nodes,
2339 unsigned int *num_of_nodes,
2340 const struct nls_table *nls_codepage, int remap)
2341 {
2342 int rc;
2343 __le16 *utf16_path = NULL;
2344 int utf16_path_len = 0;
2345 struct cifs_tcon *tcon;
2346 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
2347 struct get_dfs_referral_rsp *dfs_rsp = NULL;
2348 u32 dfs_req_size = 0, dfs_rsp_size = 0;
2349
2350 cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
2351
2352 /*
2353 * Try to use the IPC tcon, otherwise just use any
2354 */
2355 tcon = ses->tcon_ipc;
2356 if (tcon == NULL) {
2357 spin_lock(&cifs_tcp_ses_lock);
2358 tcon = list_first_entry_or_null(&ses->tcon_list,
2359 struct cifs_tcon,
2360 tcon_list);
2361 if (tcon)
2362 tcon->tc_count++;
2363 spin_unlock(&cifs_tcp_ses_lock);
2364 }
2365
2366 if (tcon == NULL) {
2367 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
2368 ses);
2369 rc = -ENOTCONN;
2370 goto out;
2371 }
2372
2373 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
2374 &utf16_path_len,
2375 nls_codepage, remap);
2376 if (!utf16_path) {
2377 rc = -ENOMEM;
2378 goto out;
2379 }
2380
2381 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
2382 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
2383 if (!dfs_req) {
2384 rc = -ENOMEM;
2385 goto out;
2386 }
2387
2388 /* Highest DFS referral version understood */
2389 dfs_req->MaxReferralLevel = DFS_VERSION;
2390
2391 /* Path to resolve in an UTF-16 null-terminated string */
2392 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
2393
2394 do {
2395 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
2396 FSCTL_DFS_GET_REFERRALS,
2397 true /* is_fsctl */,
2398 (char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
2399 (char **)&dfs_rsp, &dfs_rsp_size);
2400 } while (rc == -EAGAIN);
2401
2402 if (rc) {
2403 if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
2404 cifs_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
2405 goto out;
2406 }
2407
2408 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
2409 num_of_nodes, target_nodes,
2410 nls_codepage, remap, search_name,
2411 true /* is_unicode */);
2412 if (rc) {
2413 cifs_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
2414 goto out;
2415 }
2416
2417 out:
2418 if (tcon && !tcon->ipc) {
2419 /* ipc tcons are not refcounted */
2420 spin_lock(&cifs_tcp_ses_lock);
2421 tcon->tc_count--;
2422 spin_unlock(&cifs_tcp_ses_lock);
2423 }
2424 kfree(utf16_path);
2425 kfree(dfs_req);
2426 kfree(dfs_rsp);
2427 return rc;
2428 }
2429
2430 static int
2431 parse_reparse_posix(struct reparse_posix_data *symlink_buf,
2432 u32 plen, char **target_path,
2433 struct cifs_sb_info *cifs_sb)
2434 {
2435 unsigned int len;
2436
2437 /* See MS-FSCC 2.1.2.6 for the 'NFS' style reparse tags */
2438 len = le16_to_cpu(symlink_buf->ReparseDataLength);
2439
2440 if (le64_to_cpu(symlink_buf->InodeType) != NFS_SPECFILE_LNK) {
2441 cifs_dbg(VFS, "%lld not a supported symlink type\n",
2442 le64_to_cpu(symlink_buf->InodeType));
2443 return -EOPNOTSUPP;
2444 }
2445
2446 *target_path = cifs_strndup_from_utf16(
2447 symlink_buf->PathBuffer,
2448 len, true, cifs_sb->local_nls);
2449 if (!(*target_path))
2450 return -ENOMEM;
2451
2452 convert_delimiter(*target_path, '/');
2453 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2454
2455 return 0;
2456 }
2457
2458 static int
2459 parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
2460 u32 plen, char **target_path,
2461 struct cifs_sb_info *cifs_sb)
2462 {
2463 unsigned int sub_len;
2464 unsigned int sub_offset;
2465
2466 /* We handle Symbolic Link reparse tag here. See: MS-FSCC 2.1.2.4 */
2467
2468 sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
2469 sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
2470 if (sub_offset + 20 > plen ||
2471 sub_offset + sub_len + 20 > plen) {
2472 cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
2473 return -EIO;
2474 }
2475
2476 *target_path = cifs_strndup_from_utf16(
2477 symlink_buf->PathBuffer + sub_offset,
2478 sub_len, true, cifs_sb->local_nls);
2479 if (!(*target_path))
2480 return -ENOMEM;
2481
2482 convert_delimiter(*target_path, '/');
2483 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2484
2485 return 0;
2486 }
2487
2488 static int
2489 parse_reparse_point(struct reparse_data_buffer *buf,
2490 u32 plen, char **target_path,
2491 struct cifs_sb_info *cifs_sb)
2492 {
2493 if (plen < sizeof(struct reparse_data_buffer)) {
2494 cifs_dbg(VFS, "reparse buffer is too small. Must be "
2495 "at least 8 bytes but was %d\n", plen);
2496 return -EIO;
2497 }
2498
2499 if (plen < le16_to_cpu(buf->ReparseDataLength) +
2500 sizeof(struct reparse_data_buffer)) {
2501 cifs_dbg(VFS, "srv returned invalid reparse buf "
2502 "length: %d\n", plen);
2503 return -EIO;
2504 }
2505
2506 /* See MS-FSCC 2.1.2 */
2507 switch (le32_to_cpu(buf->ReparseTag)) {
2508 case IO_REPARSE_TAG_NFS:
2509 return parse_reparse_posix(
2510 (struct reparse_posix_data *)buf,
2511 plen, target_path, cifs_sb);
2512 case IO_REPARSE_TAG_SYMLINK:
2513 return parse_reparse_symlink(
2514 (struct reparse_symlink_data_buffer *)buf,
2515 plen, target_path, cifs_sb);
2516 default:
2517 cifs_dbg(VFS, "srv returned unknown symlink buffer "
2518 "tag:0x%08x\n", le32_to_cpu(buf->ReparseTag));
2519 return -EOPNOTSUPP;
2520 }
2521 }
2522
2523 #define SMB2_SYMLINK_STRUCT_SIZE \
2524 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
2525
2526 static int
2527 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
2528 struct cifs_sb_info *cifs_sb, const char *full_path,
2529 char **target_path, bool is_reparse_point)
2530 {
2531 int rc;
2532 __le16 *utf16_path = NULL;
2533 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2534 struct cifs_open_parms oparms;
2535 struct cifs_fid fid;
2536 struct kvec err_iov = {NULL, 0};
2537 struct smb2_err_rsp *err_buf = NULL;
2538 struct smb2_symlink_err_rsp *symlink;
2539 unsigned int sub_len;
2540 unsigned int sub_offset;
2541 unsigned int print_len;
2542 unsigned int print_offset;
2543 int flags = 0;
2544 struct smb_rqst rqst[3];
2545 int resp_buftype[3];
2546 struct kvec rsp_iov[3];
2547 struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
2548 struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
2549 struct kvec close_iov[1];
2550 struct smb2_create_rsp *create_rsp;
2551 struct smb2_ioctl_rsp *ioctl_rsp;
2552 struct reparse_data_buffer *reparse_buf;
2553 u32 plen;
2554
2555 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
2556
2557 *target_path = NULL;
2558
2559 if (smb3_encryption_required(tcon))
2560 flags |= CIFS_TRANSFORM_REQ;
2561
2562 memset(rqst, 0, sizeof(rqst));
2563 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
2564 memset(rsp_iov, 0, sizeof(rsp_iov));
2565
2566 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
2567 if (!utf16_path)
2568 return -ENOMEM;
2569
2570 /* Open */
2571 memset(&open_iov, 0, sizeof(open_iov));
2572 rqst[0].rq_iov = open_iov;
2573 rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
2574
2575 memset(&oparms, 0, sizeof(oparms));
2576 oparms.tcon = tcon;
2577 oparms.desired_access = FILE_READ_ATTRIBUTES;
2578 oparms.disposition = FILE_OPEN;
2579
2580 if (backup_cred(cifs_sb))
2581 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2582 else
2583 oparms.create_options = 0;
2584 if (is_reparse_point)
2585 oparms.create_options = OPEN_REPARSE_POINT;
2586
2587 oparms.fid = &fid;
2588 oparms.reconnect = false;
2589
2590 rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
2591 if (rc)
2592 goto querty_exit;
2593 smb2_set_next_command(tcon, &rqst[0]);
2594
2595
2596 /* IOCTL */
2597 memset(&io_iov, 0, sizeof(io_iov));
2598 rqst[1].rq_iov = io_iov;
2599 rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
2600
2601 rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
2602 fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
2603 true /* is_fctl */, NULL, 0, CIFSMaxBufSize);
2604 if (rc)
2605 goto querty_exit;
2606
2607 smb2_set_next_command(tcon, &rqst[1]);
2608 smb2_set_related(&rqst[1]);
2609
2610
2611 /* Close */
2612 memset(&close_iov, 0, sizeof(close_iov));
2613 rqst[2].rq_iov = close_iov;
2614 rqst[2].rq_nvec = 1;
2615
2616 rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
2617 if (rc)
2618 goto querty_exit;
2619
2620 smb2_set_related(&rqst[2]);
2621
2622 rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
2623 resp_buftype, rsp_iov);
2624
2625 create_rsp = rsp_iov[0].iov_base;
2626 if (create_rsp && create_rsp->sync_hdr.Status)
2627 err_iov = rsp_iov[0];
2628 ioctl_rsp = rsp_iov[1].iov_base;
2629
2630 /*
2631 * Open was successful and we got an ioctl response.
2632 */
2633 if ((rc == 0) && (is_reparse_point)) {
2634 /* See MS-FSCC 2.3.23 */
2635
2636 reparse_buf = (struct reparse_data_buffer *)
2637 ((char *)ioctl_rsp +
2638 le32_to_cpu(ioctl_rsp->OutputOffset));
2639 plen = le32_to_cpu(ioctl_rsp->OutputCount);
2640
2641 if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
2642 rsp_iov[1].iov_len) {
2643 cifs_dbg(VFS, "srv returned invalid ioctl len: %d\n",
2644 plen);
2645 rc = -EIO;
2646 goto querty_exit;
2647 }
2648
2649 rc = parse_reparse_point(reparse_buf, plen, target_path,
2650 cifs_sb);
2651 goto querty_exit;
2652 }
2653
2654 if (!rc || !err_iov.iov_base) {
2655 rc = -ENOENT;
2656 goto querty_exit;
2657 }
2658
2659 err_buf = err_iov.iov_base;
2660 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
2661 err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE) {
2662 rc = -EINVAL;
2663 goto querty_exit;
2664 }
2665
2666 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
2667 if (le32_to_cpu(symlink->SymLinkErrorTag) != SYMLINK_ERROR_TAG ||
2668 le32_to_cpu(symlink->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
2669 rc = -EINVAL;
2670 goto querty_exit;
2671 }
2672
2673 /* open must fail on symlink - reset rc */
2674 rc = 0;
2675 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
2676 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
2677 print_len = le16_to_cpu(symlink->PrintNameLength);
2678 print_offset = le16_to_cpu(symlink->PrintNameOffset);
2679
2680 if (err_iov.iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
2681 rc = -EINVAL;
2682 goto querty_exit;
2683 }
2684
2685 if (err_iov.iov_len <
2686 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
2687 rc = -EINVAL;
2688 goto querty_exit;
2689 }
2690
2691 *target_path = cifs_strndup_from_utf16(
2692 (char *)symlink->PathBuffer + sub_offset,
2693 sub_len, true, cifs_sb->local_nls);
2694 if (!(*target_path)) {
2695 rc = -ENOMEM;
2696 goto querty_exit;
2697 }
2698 convert_delimiter(*target_path, '/');
2699 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
2700
2701 querty_exit:
2702 cifs_dbg(FYI, "query symlink rc %d\n", rc);
2703 kfree(utf16_path);
2704 SMB2_open_free(&rqst[0]);
2705 SMB2_ioctl_free(&rqst[1]);
2706 SMB2_close_free(&rqst[2]);
2707 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
2708 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
2709 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
2710 return rc;
2711 }
2712
2713 static struct cifs_ntsd *
2714 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
2715 const struct cifs_fid *cifsfid, u32 *pacllen)
2716 {
2717 struct cifs_ntsd *pntsd = NULL;
2718 unsigned int xid;
2719 int rc = -EOPNOTSUPP;
2720 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2721
2722 if (IS_ERR(tlink))
2723 return ERR_CAST(tlink);
2724
2725 xid = get_xid();
2726 cifs_dbg(FYI, "trying to get acl\n");
2727
2728 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
2729 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
2730 free_xid(xid);
2731
2732 cifs_put_tlink(tlink);
2733
2734 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2735 if (rc)
2736 return ERR_PTR(rc);
2737 return pntsd;
2738
2739 }
2740
2741 static struct cifs_ntsd *
2742 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
2743 const char *path, u32 *pacllen)
2744 {
2745 struct cifs_ntsd *pntsd = NULL;
2746 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2747 unsigned int xid;
2748 int rc;
2749 struct cifs_tcon *tcon;
2750 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2751 struct cifs_fid fid;
2752 struct cifs_open_parms oparms;
2753 __le16 *utf16_path;
2754
2755 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
2756 if (IS_ERR(tlink))
2757 return ERR_CAST(tlink);
2758
2759 tcon = tlink_tcon(tlink);
2760 xid = get_xid();
2761
2762 if (backup_cred(cifs_sb))
2763 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2764 else
2765 oparms.create_options = 0;
2766
2767 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2768 if (!utf16_path) {
2769 rc = -ENOMEM;
2770 free_xid(xid);
2771 return ERR_PTR(rc);
2772 }
2773
2774 oparms.tcon = tcon;
2775 oparms.desired_access = READ_CONTROL;
2776 oparms.disposition = FILE_OPEN;
2777 oparms.fid = &fid;
2778 oparms.reconnect = false;
2779
2780 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2781 kfree(utf16_path);
2782 if (!rc) {
2783 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2784 fid.volatile_fid, (void **)&pntsd, pacllen);
2785 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2786 }
2787
2788 cifs_put_tlink(tlink);
2789 free_xid(xid);
2790
2791 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
2792 if (rc)
2793 return ERR_PTR(rc);
2794 return pntsd;
2795 }
2796
2797 static int
2798 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
2799 struct inode *inode, const char *path, int aclflag)
2800 {
2801 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
2802 unsigned int xid;
2803 int rc, access_flags = 0;
2804 struct cifs_tcon *tcon;
2805 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
2806 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
2807 struct cifs_fid fid;
2808 struct cifs_open_parms oparms;
2809 __le16 *utf16_path;
2810
2811 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
2812 if (IS_ERR(tlink))
2813 return PTR_ERR(tlink);
2814
2815 tcon = tlink_tcon(tlink);
2816 xid = get_xid();
2817
2818 if (backup_cred(cifs_sb))
2819 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
2820 else
2821 oparms.create_options = 0;
2822
2823 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
2824 access_flags = WRITE_OWNER;
2825 else
2826 access_flags = WRITE_DAC;
2827
2828 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
2829 if (!utf16_path) {
2830 rc = -ENOMEM;
2831 free_xid(xid);
2832 return rc;
2833 }
2834
2835 oparms.tcon = tcon;
2836 oparms.desired_access = access_flags;
2837 oparms.disposition = FILE_OPEN;
2838 oparms.path = path;
2839 oparms.fid = &fid;
2840 oparms.reconnect = false;
2841
2842 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL);
2843 kfree(utf16_path);
2844 if (!rc) {
2845 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
2846 fid.volatile_fid, pnntsd, acllen, aclflag);
2847 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
2848 }
2849
2850 cifs_put_tlink(tlink);
2851 free_xid(xid);
2852 return rc;
2853 }
2854
2855 /* Retrieve an ACL from the server */
2856 static struct cifs_ntsd *
2857 get_smb2_acl(struct cifs_sb_info *cifs_sb,
2858 struct inode *inode, const char *path,
2859 u32 *pacllen)
2860 {
2861 struct cifs_ntsd *pntsd = NULL;
2862 struct cifsFileInfo *open_file = NULL;
2863
2864 if (inode)
2865 open_file = find_readable_file(CIFS_I(inode), true);
2866 if (!open_file)
2867 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
2868
2869 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
2870 cifsFileInfo_put(open_file);
2871 return pntsd;
2872 }
2873
2874 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
2875 loff_t offset, loff_t len, bool keep_size)
2876 {
2877 struct cifs_ses *ses = tcon->ses;
2878 struct inode *inode;
2879 struct cifsInodeInfo *cifsi;
2880 struct cifsFileInfo *cfile = file->private_data;
2881 struct file_zero_data_information fsctl_buf;
2882 long rc;
2883 unsigned int xid;
2884 __le64 eof;
2885
2886 xid = get_xid();
2887
2888 inode = d_inode(cfile->dentry);
2889 cifsi = CIFS_I(inode);
2890
2891 trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
2892 ses->Suid, offset, len);
2893
2894
2895 /* if file not oplocked can't be sure whether asking to extend size */
2896 if (!CIFS_CACHE_READ(cifsi))
2897 if (keep_size == false) {
2898 rc = -EOPNOTSUPP;
2899 trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
2900 tcon->tid, ses->Suid, offset, len, rc);
2901 free_xid(xid);
2902 return rc;
2903 }
2904
2905 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
2906
2907 fsctl_buf.FileOffset = cpu_to_le64(offset);
2908 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2909
2910 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2911 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
2912 (char *)&fsctl_buf,
2913 sizeof(struct file_zero_data_information),
2914 0, NULL, NULL);
2915 if (rc)
2916 goto zero_range_exit;
2917
2918 /*
2919 * do we also need to change the size of the file?
2920 */
2921 if (keep_size == false && i_size_read(inode) < offset + len) {
2922 eof = cpu_to_le64(offset + len);
2923 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
2924 cfile->fid.volatile_fid, cfile->pid, &eof);
2925 }
2926
2927 zero_range_exit:
2928 free_xid(xid);
2929 if (rc)
2930 trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
2931 ses->Suid, offset, len, rc);
2932 else
2933 trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
2934 ses->Suid, offset, len);
2935 return rc;
2936 }
2937
2938 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
2939 loff_t offset, loff_t len)
2940 {
2941 struct inode *inode;
2942 struct cifsInodeInfo *cifsi;
2943 struct cifsFileInfo *cfile = file->private_data;
2944 struct file_zero_data_information fsctl_buf;
2945 long rc;
2946 unsigned int xid;
2947 __u8 set_sparse = 1;
2948
2949 xid = get_xid();
2950
2951 inode = d_inode(cfile->dentry);
2952 cifsi = CIFS_I(inode);
2953
2954 /* Need to make file sparse, if not already, before freeing range. */
2955 /* Consider adding equivalent for compressed since it could also work */
2956 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) {
2957 rc = -EOPNOTSUPP;
2958 free_xid(xid);
2959 return rc;
2960 }
2961
2962 cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
2963
2964 fsctl_buf.FileOffset = cpu_to_le64(offset);
2965 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
2966
2967 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
2968 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
2969 true /* is_fctl */, (char *)&fsctl_buf,
2970 sizeof(struct file_zero_data_information),
2971 CIFSMaxBufSize, NULL, NULL);
2972 free_xid(xid);
2973 return rc;
2974 }
2975
2976 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
2977 loff_t off, loff_t len, bool keep_size)
2978 {
2979 struct inode *inode;
2980 struct cifsInodeInfo *cifsi;
2981 struct cifsFileInfo *cfile = file->private_data;
2982 long rc = -EOPNOTSUPP;
2983 unsigned int xid;
2984 __le64 eof;
2985
2986 xid = get_xid();
2987
2988 inode = d_inode(cfile->dentry);
2989 cifsi = CIFS_I(inode);
2990
2991 trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
2992 tcon->ses->Suid, off, len);
2993 /* if file not oplocked can't be sure whether asking to extend size */
2994 if (!CIFS_CACHE_READ(cifsi))
2995 if (keep_size == false) {
2996 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
2997 tcon->tid, tcon->ses->Suid, off, len, rc);
2998 free_xid(xid);
2999 return rc;
3000 }
3001
3002 /*
3003 * Files are non-sparse by default so falloc may be a no-op
3004 * Must check if file sparse. If not sparse, and not extending
3005 * then no need to do anything since file already allocated
3006 */
3007 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
3008 if (keep_size == true)
3009 rc = 0;
3010 /* check if extending file */
3011 else if (i_size_read(inode) >= off + len)
3012 /* not extending file and already not sparse */
3013 rc = 0;
3014 /* BB: in future add else clause to extend file */
3015 else
3016 rc = -EOPNOTSUPP;
3017 if (rc)
3018 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3019 tcon->tid, tcon->ses->Suid, off, len, rc);
3020 else
3021 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid,
3022 tcon->tid, tcon->ses->Suid, off, len);
3023 free_xid(xid);
3024 return rc;
3025 }
3026
3027 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
3028 /*
3029 * Check if falloc starts within first few pages of file
3030 * and ends within a few pages of the end of file to
3031 * ensure that most of file is being forced to be
3032 * fallocated now. If so then setting whole file sparse
3033 * ie potentially making a few extra pages at the beginning
3034 * or end of the file non-sparse via set_sparse is harmless.
3035 */
3036 if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
3037 rc = -EOPNOTSUPP;
3038 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
3039 tcon->tid, tcon->ses->Suid, off, len, rc);
3040 free_xid(xid);
3041 return rc;
3042 }
3043
3044 smb2_set_sparse(xid, tcon, cfile, inode, false);
3045 rc = 0;
3046 } else {
3047 smb2_set_sparse(xid, tcon, cfile, inode, false);
3048 rc = 0;
3049 if (i_size_read(inode) < off + len) {
3050 eof = cpu_to_le64(off + len);
3051 rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
3052 cfile->fid.volatile_fid, cfile->pid,
3053 &eof);
3054 }
3055 }
3056
3057 if (rc)
3058 trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
3059 tcon->ses->Suid, off, len, rc);
3060 else
3061 trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
3062 tcon->ses->Suid, off, len);
3063
3064 free_xid(xid);
3065 return rc;
3066 }
3067
3068 static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
3069 {
3070 struct cifsFileInfo *wrcfile, *cfile = file->private_data;
3071 struct cifsInodeInfo *cifsi;
3072 struct inode *inode;
3073 int rc = 0;
3074 struct file_allocated_range_buffer in_data, *out_data = NULL;
3075 u32 out_data_len;
3076 unsigned int xid;
3077
3078 if (whence != SEEK_HOLE && whence != SEEK_DATA)
3079 return generic_file_llseek(file, offset, whence);
3080
3081 inode = d_inode(cfile->dentry);
3082 cifsi = CIFS_I(inode);
3083
3084 if (offset < 0 || offset >= i_size_read(inode))
3085 return -ENXIO;
3086
3087 xid = get_xid();
3088 /*
3089 * We need to be sure that all dirty pages are written as they
3090 * might fill holes on the server.
3091 * Note that we also MUST flush any written pages since at least
3092 * some servers (Windows2016) will not reflect recent writes in
3093 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
3094 */
3095 wrcfile = find_writable_file(cifsi, false);
3096 if (wrcfile) {
3097 filemap_write_and_wait(inode->i_mapping);
3098 smb2_flush_file(xid, tcon, &wrcfile->fid);
3099 cifsFileInfo_put(wrcfile);
3100 }
3101
3102 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
3103 if (whence == SEEK_HOLE)
3104 offset = i_size_read(inode);
3105 goto lseek_exit;
3106 }
3107
3108 in_data.file_offset = cpu_to_le64(offset);
3109 in_data.length = cpu_to_le64(i_size_read(inode));
3110
3111 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3112 cfile->fid.volatile_fid,
3113 FSCTL_QUERY_ALLOCATED_RANGES, true,
3114 (char *)&in_data, sizeof(in_data),
3115 sizeof(struct file_allocated_range_buffer),
3116 (char **)&out_data, &out_data_len);
3117 if (rc == -E2BIG)
3118 rc = 0;
3119 if (rc)
3120 goto lseek_exit;
3121
3122 if (whence == SEEK_HOLE && out_data_len == 0)
3123 goto lseek_exit;
3124
3125 if (whence == SEEK_DATA && out_data_len == 0) {
3126 rc = -ENXIO;
3127 goto lseek_exit;
3128 }
3129
3130 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3131 rc = -EINVAL;
3132 goto lseek_exit;
3133 }
3134 if (whence == SEEK_DATA) {
3135 offset = le64_to_cpu(out_data->file_offset);
3136 goto lseek_exit;
3137 }
3138 if (offset < le64_to_cpu(out_data->file_offset))
3139 goto lseek_exit;
3140
3141 offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
3142
3143 lseek_exit:
3144 free_xid(xid);
3145 kfree(out_data);
3146 if (!rc)
3147 return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
3148 else
3149 return rc;
3150 }
3151
3152 static int smb3_fiemap(struct cifs_tcon *tcon,
3153 struct cifsFileInfo *cfile,
3154 struct fiemap_extent_info *fei, u64 start, u64 len)
3155 {
3156 unsigned int xid;
3157 struct file_allocated_range_buffer in_data, *out_data;
3158 u32 out_data_len;
3159 int i, num, rc, flags, last_blob;
3160 u64 next;
3161
3162 if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
3163 return -EBADR;
3164
3165 xid = get_xid();
3166 again:
3167 in_data.file_offset = cpu_to_le64(start);
3168 in_data.length = cpu_to_le64(len);
3169
3170 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
3171 cfile->fid.volatile_fid,
3172 FSCTL_QUERY_ALLOCATED_RANGES, true,
3173 (char *)&in_data, sizeof(in_data),
3174 1024 * sizeof(struct file_allocated_range_buffer),
3175 (char **)&out_data, &out_data_len);
3176 if (rc == -E2BIG) {
3177 last_blob = 0;
3178 rc = 0;
3179 } else
3180 last_blob = 1;
3181 if (rc)
3182 goto out;
3183
3184 if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
3185 rc = -EINVAL;
3186 goto out;
3187 }
3188 if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
3189 rc = -EINVAL;
3190 goto out;
3191 }
3192
3193 num = out_data_len / sizeof(struct file_allocated_range_buffer);
3194 for (i = 0; i < num; i++) {
3195 flags = 0;
3196 if (i == num - 1 && last_blob)
3197 flags |= FIEMAP_EXTENT_LAST;
3198
3199 rc = fiemap_fill_next_extent(fei,
3200 le64_to_cpu(out_data[i].file_offset),
3201 le64_to_cpu(out_data[i].file_offset),
3202 le64_to_cpu(out_data[i].length),
3203 flags);
3204 if (rc < 0)
3205 goto out;
3206 if (rc == 1) {
3207 rc = 0;
3208 goto out;
3209 }
3210 }
3211
3212 if (!last_blob) {
3213 next = le64_to_cpu(out_data[num - 1].file_offset) +
3214 le64_to_cpu(out_data[num - 1].length);
3215 len = len - (next - start);
3216 start = next;
3217 goto again;
3218 }
3219
3220 out:
3221 free_xid(xid);
3222 kfree(out_data);
3223 return rc;
3224 }
3225
3226 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
3227 loff_t off, loff_t len)
3228 {
3229 /* KEEP_SIZE already checked for by do_fallocate */
3230 if (mode & FALLOC_FL_PUNCH_HOLE)
3231 return smb3_punch_hole(file, tcon, off, len);
3232 else if (mode & FALLOC_FL_ZERO_RANGE) {
3233 if (mode & FALLOC_FL_KEEP_SIZE)
3234 return smb3_zero_range(file, tcon, off, len, true);
3235 return smb3_zero_range(file, tcon, off, len, false);
3236 } else if (mode == FALLOC_FL_KEEP_SIZE)
3237 return smb3_simple_falloc(file, tcon, off, len, true);
3238 else if (mode == 0)
3239 return smb3_simple_falloc(file, tcon, off, len, false);
3240
3241 return -EOPNOTSUPP;
3242 }
3243
3244 static void
3245 smb2_downgrade_oplock(struct TCP_Server_Info *server,
3246 struct cifsInodeInfo *cinode, bool set_level2)
3247 {
3248 if (set_level2)
3249 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
3250 0, NULL);
3251 else
3252 server->ops->set_oplock_level(cinode, 0, 0, NULL);
3253 }
3254
3255 static void
3256 smb21_downgrade_oplock(struct TCP_Server_Info *server,
3257 struct cifsInodeInfo *cinode, bool set_level2)
3258 {
3259 server->ops->set_oplock_level(cinode,
3260 set_level2 ? SMB2_LEASE_READ_CACHING_HE :
3261 0, 0, NULL);
3262 }
3263
3264 static void
3265 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3266 unsigned int epoch, bool *purge_cache)
3267 {
3268 oplock &= 0xFF;
3269 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3270 return;
3271 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
3272 cinode->oplock = CIFS_CACHE_RHW_FLG;
3273 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
3274 &cinode->vfs_inode);
3275 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
3276 cinode->oplock = CIFS_CACHE_RW_FLG;
3277 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
3278 &cinode->vfs_inode);
3279 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
3280 cinode->oplock = CIFS_CACHE_READ_FLG;
3281 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
3282 &cinode->vfs_inode);
3283 } else
3284 cinode->oplock = 0;
3285 }
3286
3287 static void
3288 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3289 unsigned int epoch, bool *purge_cache)
3290 {
3291 char message[5] = {0};
3292 unsigned int new_oplock = 0;
3293
3294 oplock &= 0xFF;
3295 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
3296 return;
3297
3298 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
3299 new_oplock |= CIFS_CACHE_READ_FLG;
3300 strcat(message, "R");
3301 }
3302 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
3303 new_oplock |= CIFS_CACHE_HANDLE_FLG;
3304 strcat(message, "H");
3305 }
3306 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
3307 new_oplock |= CIFS_CACHE_WRITE_FLG;
3308 strcat(message, "W");
3309 }
3310 if (!new_oplock)
3311 strncpy(message, "None", sizeof(message));
3312
3313 cinode->oplock = new_oplock;
3314 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
3315 &cinode->vfs_inode);
3316 }
3317
3318 static void
3319 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
3320 unsigned int epoch, bool *purge_cache)
3321 {
3322 unsigned int old_oplock = cinode->oplock;
3323
3324 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
3325
3326 if (purge_cache) {
3327 *purge_cache = false;
3328 if (old_oplock == CIFS_CACHE_READ_FLG) {
3329 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
3330 (epoch - cinode->epoch > 0))
3331 *purge_cache = true;
3332 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3333 (epoch - cinode->epoch > 1))
3334 *purge_cache = true;
3335 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3336 (epoch - cinode->epoch > 1))
3337 *purge_cache = true;
3338 else if (cinode->oplock == 0 &&
3339 (epoch - cinode->epoch > 0))
3340 *purge_cache = true;
3341 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
3342 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
3343 (epoch - cinode->epoch > 0))
3344 *purge_cache = true;
3345 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
3346 (epoch - cinode->epoch > 1))
3347 *purge_cache = true;
3348 }
3349 cinode->epoch = epoch;
3350 }
3351 }
3352
3353 static bool
3354 smb2_is_read_op(__u32 oplock)
3355 {
3356 return oplock == SMB2_OPLOCK_LEVEL_II;
3357 }
3358
3359 static bool
3360 smb21_is_read_op(__u32 oplock)
3361 {
3362 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
3363 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
3364 }
3365
3366 static __le32
3367 map_oplock_to_lease(u8 oplock)
3368 {
3369 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
3370 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
3371 else if (oplock == SMB2_OPLOCK_LEVEL_II)
3372 return SMB2_LEASE_READ_CACHING;
3373 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
3374 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
3375 SMB2_LEASE_WRITE_CACHING;
3376 return 0;
3377 }
3378
3379 static char *
3380 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
3381 {
3382 struct create_lease *buf;
3383
3384 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
3385 if (!buf)
3386 return NULL;
3387
3388 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3389 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3390
3391 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3392 (struct create_lease, lcontext));
3393 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
3394 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3395 (struct create_lease, Name));
3396 buf->ccontext.NameLength = cpu_to_le16(4);
3397 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3398 buf->Name[0] = 'R';
3399 buf->Name[1] = 'q';
3400 buf->Name[2] = 'L';
3401 buf->Name[3] = 's';
3402 return (char *)buf;
3403 }
3404
3405 static char *
3406 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
3407 {
3408 struct create_lease_v2 *buf;
3409
3410 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
3411 if (!buf)
3412 return NULL;
3413
3414 memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE);
3415 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
3416
3417 buf->ccontext.DataOffset = cpu_to_le16(offsetof
3418 (struct create_lease_v2, lcontext));
3419 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
3420 buf->ccontext.NameOffset = cpu_to_le16(offsetof
3421 (struct create_lease_v2, Name));
3422 buf->ccontext.NameLength = cpu_to_le16(4);
3423 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
3424 buf->Name[0] = 'R';
3425 buf->Name[1] = 'q';
3426 buf->Name[2] = 'L';
3427 buf->Name[3] = 's';
3428 return (char *)buf;
3429 }
3430
3431 static __u8
3432 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3433 {
3434 struct create_lease *lc = (struct create_lease *)buf;
3435
3436 *epoch = 0; /* not used */
3437 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3438 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3439 return le32_to_cpu(lc->lcontext.LeaseState);
3440 }
3441
3442 static __u8
3443 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key)
3444 {
3445 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
3446
3447 *epoch = le16_to_cpu(lc->lcontext.Epoch);
3448 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
3449 return SMB2_OPLOCK_LEVEL_NOCHANGE;
3450 if (lease_key)
3451 memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
3452 return le32_to_cpu(lc->lcontext.LeaseState);
3453 }
3454
3455 static unsigned int
3456 smb2_wp_retry_size(struct inode *inode)
3457 {
3458 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
3459 SMB2_MAX_BUFFER_SIZE);
3460 }
3461
3462 static bool
3463 smb2_dir_needs_close(struct cifsFileInfo *cfile)
3464 {
3465 return !cfile->invalidHandle;
3466 }
3467
3468 static void
3469 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len,
3470 struct smb_rqst *old_rq, __le16 cipher_type)
3471 {
3472 struct smb2_sync_hdr *shdr =
3473 (struct smb2_sync_hdr *)old_rq->rq_iov[0].iov_base;
3474
3475 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
3476 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
3477 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
3478 tr_hdr->Flags = cpu_to_le16(0x01);
3479 if (cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3480 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3481 else
3482 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3483 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
3484 }
3485
3486 /* We can not use the normal sg_set_buf() as we will sometimes pass a
3487 * stack object as buf.
3488 */
3489 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
3490 unsigned int buflen)
3491 {
3492 sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
3493 }
3494
3495 /* Assumes the first rqst has a transform header as the first iov.
3496 * I.e.
3497 * rqst[0].rq_iov[0] is transform header
3498 * rqst[0].rq_iov[1+] data to be encrypted/decrypted
3499 * rqst[1+].rq_iov[0+] data to be encrypted/decrypted
3500 */
3501 static struct scatterlist *
3502 init_sg(int num_rqst, struct smb_rqst *rqst, u8 *sign)
3503 {
3504 unsigned int sg_len;
3505 struct scatterlist *sg;
3506 unsigned int i;
3507 unsigned int j;
3508 unsigned int idx = 0;
3509 int skip;
3510
3511 sg_len = 1;
3512 for (i = 0; i < num_rqst; i++)
3513 sg_len += rqst[i].rq_nvec + rqst[i].rq_npages;
3514
3515 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
3516 if (!sg)
3517 return NULL;
3518
3519 sg_init_table(sg, sg_len);
3520 for (i = 0; i < num_rqst; i++) {
3521 for (j = 0; j < rqst[i].rq_nvec; j++) {
3522 /*
3523 * The first rqst has a transform header where the
3524 * first 20 bytes are not part of the encrypted blob
3525 */
3526 skip = (i == 0) && (j == 0) ? 20 : 0;
3527 smb2_sg_set_buf(&sg[idx++],
3528 rqst[i].rq_iov[j].iov_base + skip,
3529 rqst[i].rq_iov[j].iov_len - skip);
3530 }
3531
3532 for (j = 0; j < rqst[i].rq_npages; j++) {
3533 unsigned int len, offset;
3534
3535 rqst_page_get_length(&rqst[i], j, &len, &offset);
3536 sg_set_page(&sg[idx++], rqst[i].rq_pages[j], len, offset);
3537 }
3538 }
3539 smb2_sg_set_buf(&sg[idx], sign, SMB2_SIGNATURE_SIZE);
3540 return sg;
3541 }
3542
3543 static int
3544 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
3545 {
3546 struct cifs_ses *ses;
3547 u8 *ses_enc_key;
3548
3549 spin_lock(&cifs_tcp_ses_lock);
3550 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
3551 if (ses->Suid != ses_id)
3552 continue;
3553 ses_enc_key = enc ? ses->smb3encryptionkey :
3554 ses->smb3decryptionkey;
3555 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
3556 spin_unlock(&cifs_tcp_ses_lock);
3557 return 0;
3558 }
3559 spin_unlock(&cifs_tcp_ses_lock);
3560
3561 return 1;
3562 }
3563 /*
3564 * Encrypt or decrypt @rqst message. @rqst[0] has the following format:
3565 * iov[0] - transform header (associate data),
3566 * iov[1-N] - SMB2 header and pages - data to encrypt.
3567 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
3568 * untouched.
3569 */
3570 static int
3571 crypt_message(struct TCP_Server_Info *server, int num_rqst,
3572 struct smb_rqst *rqst, int enc)
3573 {
3574 struct smb2_transform_hdr *tr_hdr =
3575 (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base;
3576 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20;
3577 int rc = 0;
3578 struct scatterlist *sg;
3579 u8 sign[SMB2_SIGNATURE_SIZE] = {};
3580 u8 key[SMB3_SIGN_KEY_SIZE];
3581 struct aead_request *req;
3582 char *iv;
3583 unsigned int iv_len;
3584 DECLARE_CRYPTO_WAIT(wait);
3585 struct crypto_aead *tfm;
3586 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
3587
3588 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
3589 if (rc) {
3590 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
3591 enc ? "en" : "de");
3592 return 0;
3593 }
3594
3595 rc = smb3_crypto_aead_allocate(server);
3596 if (rc) {
3597 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
3598 return rc;
3599 }
3600
3601 tfm = enc ? server->secmech.ccmaesencrypt :
3602 server->secmech.ccmaesdecrypt;
3603 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
3604 if (rc) {
3605 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
3606 return rc;
3607 }
3608
3609 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
3610 if (rc) {
3611 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
3612 return rc;
3613 }
3614
3615 req = aead_request_alloc(tfm, GFP_KERNEL);
3616 if (!req) {
3617 cifs_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
3618 return -ENOMEM;
3619 }
3620
3621 if (!enc) {
3622 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
3623 crypt_len += SMB2_SIGNATURE_SIZE;
3624 }
3625
3626 sg = init_sg(num_rqst, rqst, sign);
3627 if (!sg) {
3628 cifs_dbg(VFS, "%s: Failed to init sg\n", __func__);
3629 rc = -ENOMEM;
3630 goto free_req;
3631 }
3632
3633 iv_len = crypto_aead_ivsize(tfm);
3634 iv = kzalloc(iv_len, GFP_KERNEL);
3635 if (!iv) {
3636 cifs_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
3637 rc = -ENOMEM;
3638 goto free_sg;
3639 }
3640
3641 if (server->cipher_type == SMB2_ENCRYPTION_AES128_GCM)
3642 memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES128GCM_NONCE);
3643 else {
3644 iv[0] = 3;
3645 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CCM_NONCE);
3646 }
3647
3648 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
3649 aead_request_set_ad(req, assoc_data_len);
3650
3651 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
3652 crypto_req_done, &wait);
3653
3654 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
3655 : crypto_aead_decrypt(req), &wait);
3656
3657 if (!rc && enc)
3658 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
3659
3660 kfree(iv);
3661 free_sg:
3662 kfree(sg);
3663 free_req:
3664 kfree(req);
3665 return rc;
3666 }
3667
3668 void
3669 smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst)
3670 {
3671 int i, j;
3672
3673 for (i = 0; i < num_rqst; i++) {
3674 if (rqst[i].rq_pages) {
3675 for (j = rqst[i].rq_npages - 1; j >= 0; j--)
3676 put_page(rqst[i].rq_pages[j]);
3677 kfree(rqst[i].rq_pages);
3678 }
3679 }
3680 }
3681
3682 /*
3683 * This function will initialize new_rq and encrypt the content.
3684 * The first entry, new_rq[0], only contains a single iov which contains
3685 * a smb2_transform_hdr and is pre-allocated by the caller.
3686 * This function then populates new_rq[1+] with the content from olq_rq[0+].
3687 *
3688 * The end result is an array of smb_rqst structures where the first structure
3689 * only contains a single iov for the transform header which we then can pass
3690 * to crypt_message().
3691 *
3692 * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller
3693 * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests
3694 */
3695 static int
3696 smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
3697 struct smb_rqst *new_rq, struct smb_rqst *old_rq)
3698 {
3699 struct page **pages;
3700 struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base;
3701 unsigned int npages;
3702 unsigned int orig_len = 0;
3703 int i, j;
3704 int rc = -ENOMEM;
3705
3706 for (i = 1; i < num_rqst; i++) {
3707 npages = old_rq[i - 1].rq_npages;
3708 pages = kmalloc_array(npages, sizeof(struct page *),
3709 GFP_KERNEL);
3710 if (!pages)
3711 goto err_free;
3712
3713 new_rq[i].rq_pages = pages;
3714 new_rq[i].rq_npages = npages;
3715 new_rq[i].rq_offset = old_rq[i - 1].rq_offset;
3716 new_rq[i].rq_pagesz = old_rq[i - 1].rq_pagesz;
3717 new_rq[i].rq_tailsz = old_rq[i - 1].rq_tailsz;
3718 new_rq[i].rq_iov = old_rq[i - 1].rq_iov;
3719 new_rq[i].rq_nvec = old_rq[i - 1].rq_nvec;
3720
3721 orig_len += smb_rqst_len(server, &old_rq[i - 1]);
3722
3723 for (j = 0; j < npages; j++) {
3724 pages[j] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
3725 if (!pages[j])
3726 goto err_free;
3727 }
3728
3729 /* copy pages form the old */
3730 for (j = 0; j < npages; j++) {
3731 char *dst, *src;
3732 unsigned int offset, len;
3733
3734 rqst_page_get_length(&new_rq[i], j, &len, &offset);
3735
3736 dst = (char *) kmap(new_rq[i].rq_pages[j]) + offset;
3737 src = (char *) kmap(old_rq[i - 1].rq_pages[j]) + offset;
3738
3739 memcpy(dst, src, len);
3740 kunmap(new_rq[i].rq_pages[j]);
3741 kunmap(old_rq[i - 1].rq_pages[j]);
3742 }
3743 }
3744
3745 /* fill the 1st iov with a transform header */
3746 fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type);
3747
3748 rc = crypt_message(server, num_rqst, new_rq, 1);
3749 cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
3750 if (rc)
3751 goto err_free;
3752
3753 return rc;
3754
3755 err_free:
3756 smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]);
3757 return rc;
3758 }
3759
3760 static int
3761 smb3_is_transform_hdr(void *buf)
3762 {
3763 struct smb2_transform_hdr *trhdr = buf;
3764
3765 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
3766 }
3767
3768 static int
3769 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
3770 unsigned int buf_data_size, struct page **pages,
3771 unsigned int npages, unsigned int page_data_size)
3772 {
3773 struct kvec iov[2];
3774 struct smb_rqst rqst = {NULL};
3775 int rc;
3776
3777 iov[0].iov_base = buf;
3778 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
3779 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
3780 iov[1].iov_len = buf_data_size;
3781
3782 rqst.rq_iov = iov;
3783 rqst.rq_nvec = 2;
3784 rqst.rq_pages = pages;
3785 rqst.rq_npages = npages;
3786 rqst.rq_pagesz = PAGE_SIZE;
3787 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
3788
3789 rc = crypt_message(server, 1, &rqst, 0);
3790 cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
3791
3792 if (rc)
3793 return rc;
3794
3795 memmove(buf, iov[1].iov_base, buf_data_size);
3796
3797 server->total_read = buf_data_size + page_data_size;
3798
3799 return rc;
3800 }
3801
3802 static int
3803 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
3804 unsigned int npages, unsigned int len)
3805 {
3806 int i;
3807 int length;
3808
3809 for (i = 0; i < npages; i++) {
3810 struct page *page = pages[i];
3811 size_t n;
3812
3813 n = len;
3814 if (len >= PAGE_SIZE) {
3815 /* enough data to fill the page */
3816 n = PAGE_SIZE;
3817 len -= n;
3818 } else {
3819 zero_user(page, len, PAGE_SIZE - len);
3820 len = 0;
3821 }
3822 length = cifs_read_page_from_socket(server, page, 0, n);
3823 if (length < 0)
3824 return length;
3825 server->total_read += length;
3826 }
3827
3828 return 0;
3829 }
3830
3831 static int
3832 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
3833 unsigned int cur_off, struct bio_vec **page_vec)
3834 {
3835 struct bio_vec *bvec;
3836 int i;
3837
3838 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
3839 if (!bvec)
3840 return -ENOMEM;
3841
3842 for (i = 0; i < npages; i++) {
3843 bvec[i].bv_page = pages[i];
3844 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
3845 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
3846 data_size -= bvec[i].bv_len;
3847 }
3848
3849 if (data_size != 0) {
3850 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
3851 kfree(bvec);
3852 return -EIO;
3853 }
3854
3855 *page_vec = bvec;
3856 return 0;
3857 }
3858
3859 static int
3860 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
3861 char *buf, unsigned int buf_len, struct page **pages,
3862 unsigned int npages, unsigned int page_data_size)
3863 {
3864 unsigned int data_offset;
3865 unsigned int data_len;
3866 unsigned int cur_off;
3867 unsigned int cur_page_idx;
3868 unsigned int pad_len;
3869 struct cifs_readdata *rdata = mid->callback_data;
3870 struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
3871 struct bio_vec *bvec = NULL;
3872 struct iov_iter iter;
3873 struct kvec iov;
3874 int length;
3875 bool use_rdma_mr = false;
3876
3877 if (shdr->Command != SMB2_READ) {
3878 cifs_dbg(VFS, "only big read responses are supported\n");
3879 return -ENOTSUPP;
3880 }
3881
3882 if (server->ops->is_session_expired &&
3883 server->ops->is_session_expired(buf)) {
3884 cifs_reconnect(server);
3885 wake_up(&server->response_q);
3886 return -1;
3887 }
3888
3889 if (server->ops->is_status_pending &&
3890 server->ops->is_status_pending(buf, server))
3891 return -1;
3892
3893 /* set up first two iov to get credits */
3894 rdata->iov[0].iov_base = buf;
3895 rdata->iov[0].iov_len = 0;
3896 rdata->iov[1].iov_base = buf;
3897 rdata->iov[1].iov_len =
3898 min_t(unsigned int, buf_len, server->vals->read_rsp_size);
3899 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
3900 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
3901 cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
3902 rdata->iov[1].iov_base, rdata->iov[1].iov_len);
3903
3904 rdata->result = server->ops->map_error(buf, true);
3905 if (rdata->result != 0) {
3906 cifs_dbg(FYI, "%s: server returned error %d\n",
3907 __func__, rdata->result);
3908 /* normal error on read response */
3909 dequeue_mid(mid, false);
3910 return 0;
3911 }
3912
3913 data_offset = server->ops->read_data_offset(buf);
3914 #ifdef CONFIG_CIFS_SMB_DIRECT
3915 use_rdma_mr = rdata->mr;
3916 #endif
3917 data_len = server->ops->read_data_length(buf, use_rdma_mr);
3918
3919 if (data_offset < server->vals->read_rsp_size) {
3920 /*
3921 * win2k8 sometimes sends an offset of 0 when the read
3922 * is beyond the EOF. Treat it as if the data starts just after
3923 * the header.
3924 */
3925 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
3926 __func__, data_offset);
3927 data_offset = server->vals->read_rsp_size;
3928 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
3929 /* data_offset is beyond the end of smallbuf */
3930 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
3931 __func__, data_offset);
3932 rdata->result = -EIO;
3933 dequeue_mid(mid, rdata->result);
3934 return 0;
3935 }
3936
3937 pad_len = data_offset - server->vals->read_rsp_size;
3938
3939 if (buf_len <= data_offset) {
3940 /* read response payload is in pages */
3941 cur_page_idx = pad_len / PAGE_SIZE;
3942 cur_off = pad_len % PAGE_SIZE;
3943
3944 if (cur_page_idx != 0) {
3945 /* data offset is beyond the 1st page of response */
3946 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
3947 __func__, data_offset);
3948 rdata->result = -EIO;
3949 dequeue_mid(mid, rdata->result);
3950 return 0;
3951 }
3952
3953 if (data_len > page_data_size - pad_len) {
3954 /* data_len is corrupt -- discard frame */
3955 rdata->result = -EIO;
3956 dequeue_mid(mid, rdata->result);
3957 return 0;
3958 }
3959
3960 rdata->result = init_read_bvec(pages, npages, page_data_size,
3961 cur_off, &bvec);
3962 if (rdata->result != 0) {
3963 dequeue_mid(mid, rdata->result);
3964 return 0;
3965 }
3966
3967 iov_iter_bvec(&iter, WRITE, bvec, npages, data_len);
3968 } else if (buf_len >= data_offset + data_len) {
3969 /* read response payload is in buf */
3970 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
3971 iov.iov_base = buf + data_offset;
3972 iov.iov_len = data_len;
3973 iov_iter_kvec(&iter, WRITE, &iov, 1, data_len);
3974 } else {
3975 /* read response payload cannot be in both buf and pages */
3976 WARN_ONCE(1, "buf can not contain only a part of read data");
3977 rdata->result = -EIO;
3978 dequeue_mid(mid, rdata->result);
3979 return 0;
3980 }
3981
3982 length = rdata->copy_into_pages(server, rdata, &iter);
3983
3984 kfree(bvec);
3985
3986 if (length < 0)
3987 return length;
3988
3989 dequeue_mid(mid, false);
3990 return length;
3991 }
3992
3993 static int
3994 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
3995 {
3996 char *buf = server->smallbuf;
3997 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
3998 unsigned int npages;
3999 struct page **pages;
4000 unsigned int len;
4001 unsigned int buflen = server->pdu_size;
4002 int rc;
4003 int i = 0;
4004
4005 len = min_t(unsigned int, buflen, server->vals->read_rsp_size +
4006 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
4007
4008 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
4009 if (rc < 0)
4010 return rc;
4011 server->total_read += rc;
4012
4013 len = le32_to_cpu(tr_hdr->OriginalMessageSize) -
4014 server->vals->read_rsp_size;
4015 npages = DIV_ROUND_UP(len, PAGE_SIZE);
4016
4017 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
4018 if (!pages) {
4019 rc = -ENOMEM;
4020 goto discard_data;
4021 }
4022
4023 for (; i < npages; i++) {
4024 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
4025 if (!pages[i]) {
4026 rc = -ENOMEM;
4027 goto discard_data;
4028 }
4029 }
4030
4031 /* read read data into pages */
4032 rc = read_data_into_pages(server, pages, npages, len);
4033 if (rc)
4034 goto free_pages;
4035
4036 rc = cifs_discard_remaining_data(server);
4037 if (rc)
4038 goto free_pages;
4039
4040 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size,
4041 pages, npages, len);
4042 if (rc)
4043 goto free_pages;
4044
4045 *mid = smb2_find_mid(server, buf);
4046 if (*mid == NULL)
4047 cifs_dbg(FYI, "mid not found\n");
4048 else {
4049 cifs_dbg(FYI, "mid found\n");
4050 (*mid)->decrypted = true;
4051 rc = handle_read_data(server, *mid, buf,
4052 server->vals->read_rsp_size,
4053 pages, npages, len);
4054 }
4055
4056 free_pages:
4057 for (i = i - 1; i >= 0; i--)
4058 put_page(pages[i]);
4059 kfree(pages);
4060 return rc;
4061 discard_data:
4062 cifs_discard_remaining_data(server);
4063 goto free_pages;
4064 }
4065
4066 static int
4067 receive_encrypted_standard(struct TCP_Server_Info *server,
4068 struct mid_q_entry **mids, char **bufs,
4069 int *num_mids)
4070 {
4071 int ret, length;
4072 char *buf = server->smallbuf;
4073 char *tmpbuf;
4074 struct smb2_sync_hdr *shdr;
4075 unsigned int pdu_length = server->pdu_size;
4076 unsigned int buf_size;
4077 struct mid_q_entry *mid_entry;
4078 int next_is_large;
4079 char *next_buffer = NULL;
4080
4081 *num_mids = 0;
4082
4083 /* switch to large buffer if too big for a small one */
4084 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) {
4085 server->large_buf = true;
4086 memcpy(server->bigbuf, buf, server->total_read);
4087 buf = server->bigbuf;
4088 }
4089
4090 /* now read the rest */
4091 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
4092 pdu_length - HEADER_SIZE(server) + 1);
4093 if (length < 0)
4094 return length;
4095 server->total_read += length;
4096
4097 buf_size = pdu_length - sizeof(struct smb2_transform_hdr);
4098 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
4099 if (length)
4100 return length;
4101
4102 next_is_large = server->large_buf;
4103 one_more:
4104 shdr = (struct smb2_sync_hdr *)buf;
4105 if (shdr->NextCommand) {
4106 if (next_is_large) {
4107 tmpbuf = server->bigbuf;
4108 next_buffer = (char *)cifs_buf_get();
4109 } else {
4110 tmpbuf = server->smallbuf;
4111 next_buffer = (char *)cifs_small_buf_get();
4112 }
4113 memcpy(next_buffer,
4114 tmpbuf + le32_to_cpu(shdr->NextCommand),
4115 pdu_length - le32_to_cpu(shdr->NextCommand));
4116 }
4117
4118 mid_entry = smb2_find_mid(server, buf);
4119 if (mid_entry == NULL)
4120 cifs_dbg(FYI, "mid not found\n");
4121 else {
4122 cifs_dbg(FYI, "mid found\n");
4123 mid_entry->decrypted = true;
4124 mid_entry->resp_buf_size = server->pdu_size;
4125 }
4126
4127 if (*num_mids >= MAX_COMPOUND) {
4128 cifs_dbg(VFS, "too many PDUs in compound\n");
4129 return -1;
4130 }
4131 bufs[*num_mids] = buf;
4132 mids[(*num_mids)++] = mid_entry;
4133
4134 if (mid_entry && mid_entry->handle)
4135 ret = mid_entry->handle(server, mid_entry);
4136 else
4137 ret = cifs_handle_standard(server, mid_entry);
4138
4139 if (ret == 0 && shdr->NextCommand) {
4140 pdu_length -= le32_to_cpu(shdr->NextCommand);
4141 server->large_buf = next_is_large;
4142 if (next_is_large)
4143 server->bigbuf = next_buffer;
4144 else
4145 server->smallbuf = next_buffer;
4146
4147 buf += le32_to_cpu(shdr->NextCommand);
4148 goto one_more;
4149 }
4150
4151 return ret;
4152 }
4153
4154 static int
4155 smb3_receive_transform(struct TCP_Server_Info *server,
4156 struct mid_q_entry **mids, char **bufs, int *num_mids)
4157 {
4158 char *buf = server->smallbuf;
4159 unsigned int pdu_length = server->pdu_size;
4160 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
4161 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
4162
4163 if (pdu_length < sizeof(struct smb2_transform_hdr) +
4164 sizeof(struct smb2_sync_hdr)) {
4165 cifs_dbg(VFS, "Transform message is too small (%u)\n",
4166 pdu_length);
4167 cifs_reconnect(server);
4168 wake_up(&server->response_q);
4169 return -ECONNABORTED;
4170 }
4171
4172 if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
4173 cifs_dbg(VFS, "Transform message is broken\n");
4174 cifs_reconnect(server);
4175 wake_up(&server->response_q);
4176 return -ECONNABORTED;
4177 }
4178
4179 /* TODO: add support for compounds containing READ. */
4180 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) {
4181 *num_mids = 1;
4182 return receive_encrypted_read(server, &mids[0]);
4183 }
4184
4185 return receive_encrypted_standard(server, mids, bufs, num_mids);
4186 }
4187
4188 int
4189 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
4190 {
4191 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
4192
4193 return handle_read_data(server, mid, buf, server->pdu_size,
4194 NULL, 0, 0);
4195 }
4196
4197 static int
4198 smb2_next_header(char *buf)
4199 {
4200 struct smb2_sync_hdr *hdr = (struct smb2_sync_hdr *)buf;
4201 struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf;
4202
4203 if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM)
4204 return sizeof(struct smb2_transform_hdr) +
4205 le32_to_cpu(t_hdr->OriginalMessageSize);
4206
4207 return le32_to_cpu(hdr->NextCommand);
4208 }
4209
4210 static int
4211 smb2_make_node(unsigned int xid, struct inode *inode,
4212 struct dentry *dentry, struct cifs_tcon *tcon,
4213 char *full_path, umode_t mode, dev_t dev)
4214 {
4215 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
4216 int rc = -EPERM;
4217 int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
4218 FILE_ALL_INFO *buf = NULL;
4219 struct cifs_io_parms io_parms;
4220 __u32 oplock = 0;
4221 struct cifs_fid fid;
4222 struct cifs_open_parms oparms;
4223 unsigned int bytes_written;
4224 struct win_dev *pdev;
4225 struct kvec iov[2];
4226
4227 /*
4228 * Check if mounted with mount parm 'sfu' mount parm.
4229 * SFU emulation should work with all servers, but only
4230 * supports block and char device (no socket & fifo),
4231 * and was used by default in earlier versions of Windows
4232 */
4233 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
4234 goto out;
4235
4236 /*
4237 * TODO: Add ability to create instead via reparse point. Windows (e.g.
4238 * their current NFS server) uses this approach to expose special files
4239 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
4240 */
4241
4242 if (!S_ISCHR(mode) && !S_ISBLK(mode))
4243 goto out;
4244
4245 cifs_dbg(FYI, "sfu compat create special file\n");
4246
4247 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
4248 if (buf == NULL) {
4249 rc = -ENOMEM;
4250 goto out;
4251 }
4252
4253 if (backup_cred(cifs_sb))
4254 create_options |= CREATE_OPEN_BACKUP_INTENT;
4255
4256 oparms.tcon = tcon;
4257 oparms.cifs_sb = cifs_sb;
4258 oparms.desired_access = GENERIC_WRITE;
4259 oparms.create_options = create_options;
4260 oparms.disposition = FILE_CREATE;
4261 oparms.path = full_path;
4262 oparms.fid = &fid;
4263 oparms.reconnect = false;
4264
4265 if (tcon->ses->server->oplocks)
4266 oplock = REQ_OPLOCK;
4267 else
4268 oplock = 0;
4269 rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
4270 if (rc)
4271 goto out;
4272
4273 /*
4274 * BB Do not bother to decode buf since no local inode yet to put
4275 * timestamps in, but we can reuse it safely.
4276 */
4277
4278 pdev = (struct win_dev *)buf;
4279 io_parms.pid = current->tgid;
4280 io_parms.tcon = tcon;
4281 io_parms.offset = 0;
4282 io_parms.length = sizeof(struct win_dev);
4283 iov[1].iov_base = buf;
4284 iov[1].iov_len = sizeof(struct win_dev);
4285 if (S_ISCHR(mode)) {
4286 memcpy(pdev->type, "IntxCHR", 8);
4287 pdev->major = cpu_to_le64(MAJOR(dev));
4288 pdev->minor = cpu_to_le64(MINOR(dev));
4289 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4290 &bytes_written, iov, 1);
4291 } else if (S_ISBLK(mode)) {
4292 memcpy(pdev->type, "IntxBLK", 8);
4293 pdev->major = cpu_to_le64(MAJOR(dev));
4294 pdev->minor = cpu_to_le64(MINOR(dev));
4295 rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
4296 &bytes_written, iov, 1);
4297 }
4298 tcon->ses->server->ops->close(xid, tcon, &fid);
4299 d_drop(dentry);
4300
4301 /* FIXME: add code here to set EAs */
4302 out:
4303 kfree(buf);
4304 return rc;
4305 }
4306
4307
4308 struct smb_version_operations smb20_operations = {
4309 .compare_fids = smb2_compare_fids,
4310 .setup_request = smb2_setup_request,
4311 .setup_async_request = smb2_setup_async_request,
4312 .check_receive = smb2_check_receive,
4313 .add_credits = smb2_add_credits,
4314 .set_credits = smb2_set_credits,
4315 .get_credits_field = smb2_get_credits_field,
4316 .get_credits = smb2_get_credits,
4317 .wait_mtu_credits = cifs_wait_mtu_credits,
4318 .get_next_mid = smb2_get_next_mid,
4319 .revert_current_mid = smb2_revert_current_mid,
4320 .read_data_offset = smb2_read_data_offset,
4321 .read_data_length = smb2_read_data_length,
4322 .map_error = map_smb2_to_linux_error,
4323 .find_mid = smb2_find_mid,
4324 .check_message = smb2_check_message,
4325 .dump_detail = smb2_dump_detail,
4326 .clear_stats = smb2_clear_stats,
4327 .print_stats = smb2_print_stats,
4328 .is_oplock_break = smb2_is_valid_oplock_break,
4329 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4330 .downgrade_oplock = smb2_downgrade_oplock,
4331 .need_neg = smb2_need_neg,
4332 .negotiate = smb2_negotiate,
4333 .negotiate_wsize = smb2_negotiate_wsize,
4334 .negotiate_rsize = smb2_negotiate_rsize,
4335 .sess_setup = SMB2_sess_setup,
4336 .logoff = SMB2_logoff,
4337 .tree_connect = SMB2_tcon,
4338 .tree_disconnect = SMB2_tdis,
4339 .qfs_tcon = smb2_qfs_tcon,
4340 .is_path_accessible = smb2_is_path_accessible,
4341 .can_echo = smb2_can_echo,
4342 .echo = SMB2_echo,
4343 .query_path_info = smb2_query_path_info,
4344 .get_srv_inum = smb2_get_srv_inum,
4345 .query_file_info = smb2_query_file_info,
4346 .set_path_size = smb2_set_path_size,
4347 .set_file_size = smb2_set_file_size,
4348 .set_file_info = smb2_set_file_info,
4349 .set_compression = smb2_set_compression,
4350 .mkdir = smb2_mkdir,
4351 .mkdir_setinfo = smb2_mkdir_setinfo,
4352 .rmdir = smb2_rmdir,
4353 .unlink = smb2_unlink,
4354 .rename = smb2_rename_path,
4355 .create_hardlink = smb2_create_hardlink,
4356 .query_symlink = smb2_query_symlink,
4357 .query_mf_symlink = smb3_query_mf_symlink,
4358 .create_mf_symlink = smb3_create_mf_symlink,
4359 .open = smb2_open_file,
4360 .set_fid = smb2_set_fid,
4361 .close = smb2_close_file,
4362 .flush = smb2_flush_file,
4363 .async_readv = smb2_async_readv,
4364 .async_writev = smb2_async_writev,
4365 .sync_read = smb2_sync_read,
4366 .sync_write = smb2_sync_write,
4367 .query_dir_first = smb2_query_dir_first,
4368 .query_dir_next = smb2_query_dir_next,
4369 .close_dir = smb2_close_dir,
4370 .calc_smb_size = smb2_calc_size,
4371 .is_status_pending = smb2_is_status_pending,
4372 .is_session_expired = smb2_is_session_expired,
4373 .oplock_response = smb2_oplock_response,
4374 .queryfs = smb2_queryfs,
4375 .mand_lock = smb2_mand_lock,
4376 .mand_unlock_range = smb2_unlock_range,
4377 .push_mand_locks = smb2_push_mandatory_locks,
4378 .get_lease_key = smb2_get_lease_key,
4379 .set_lease_key = smb2_set_lease_key,
4380 .new_lease_key = smb2_new_lease_key,
4381 .calc_signature = smb2_calc_signature,
4382 .is_read_op = smb2_is_read_op,
4383 .set_oplock_level = smb2_set_oplock_level,
4384 .create_lease_buf = smb2_create_lease_buf,
4385 .parse_lease_buf = smb2_parse_lease_buf,
4386 .copychunk_range = smb2_copychunk_range,
4387 .wp_retry_size = smb2_wp_retry_size,
4388 .dir_needs_close = smb2_dir_needs_close,
4389 .get_dfs_refer = smb2_get_dfs_refer,
4390 .select_sectype = smb2_select_sectype,
4391 #ifdef CONFIG_CIFS_XATTR
4392 .query_all_EAs = smb2_query_eas,
4393 .set_EA = smb2_set_ea,
4394 #endif /* CIFS_XATTR */
4395 .get_acl = get_smb2_acl,
4396 .get_acl_by_fid = get_smb2_acl_by_fid,
4397 .set_acl = set_smb2_acl,
4398 .next_header = smb2_next_header,
4399 .ioctl_query_info = smb2_ioctl_query_info,
4400 .make_node = smb2_make_node,
4401 .fiemap = smb3_fiemap,
4402 .llseek = smb3_llseek,
4403 };
4404
4405 struct smb_version_operations smb21_operations = {
4406 .compare_fids = smb2_compare_fids,
4407 .setup_request = smb2_setup_request,
4408 .setup_async_request = smb2_setup_async_request,
4409 .check_receive = smb2_check_receive,
4410 .add_credits = smb2_add_credits,
4411 .set_credits = smb2_set_credits,
4412 .get_credits_field = smb2_get_credits_field,
4413 .get_credits = smb2_get_credits,
4414 .wait_mtu_credits = smb2_wait_mtu_credits,
4415 .adjust_credits = smb2_adjust_credits,
4416 .get_next_mid = smb2_get_next_mid,
4417 .revert_current_mid = smb2_revert_current_mid,
4418 .read_data_offset = smb2_read_data_offset,
4419 .read_data_length = smb2_read_data_length,
4420 .map_error = map_smb2_to_linux_error,
4421 .find_mid = smb2_find_mid,
4422 .check_message = smb2_check_message,
4423 .dump_detail = smb2_dump_detail,
4424 .clear_stats = smb2_clear_stats,
4425 .print_stats = smb2_print_stats,
4426 .is_oplock_break = smb2_is_valid_oplock_break,
4427 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4428 .downgrade_oplock = smb21_downgrade_oplock,
4429 .need_neg = smb2_need_neg,
4430 .negotiate = smb2_negotiate,
4431 .negotiate_wsize = smb2_negotiate_wsize,
4432 .negotiate_rsize = smb2_negotiate_rsize,
4433 .sess_setup = SMB2_sess_setup,
4434 .logoff = SMB2_logoff,
4435 .tree_connect = SMB2_tcon,
4436 .tree_disconnect = SMB2_tdis,
4437 .qfs_tcon = smb2_qfs_tcon,
4438 .is_path_accessible = smb2_is_path_accessible,
4439 .can_echo = smb2_can_echo,
4440 .echo = SMB2_echo,
4441 .query_path_info = smb2_query_path_info,
4442 .get_srv_inum = smb2_get_srv_inum,
4443 .query_file_info = smb2_query_file_info,
4444 .set_path_size = smb2_set_path_size,
4445 .set_file_size = smb2_set_file_size,
4446 .set_file_info = smb2_set_file_info,
4447 .set_compression = smb2_set_compression,
4448 .mkdir = smb2_mkdir,
4449 .mkdir_setinfo = smb2_mkdir_setinfo,
4450 .rmdir = smb2_rmdir,
4451 .unlink = smb2_unlink,
4452 .rename = smb2_rename_path,
4453 .create_hardlink = smb2_create_hardlink,
4454 .query_symlink = smb2_query_symlink,
4455 .query_mf_symlink = smb3_query_mf_symlink,
4456 .create_mf_symlink = smb3_create_mf_symlink,
4457 .open = smb2_open_file,
4458 .set_fid = smb2_set_fid,
4459 .close = smb2_close_file,
4460 .flush = smb2_flush_file,
4461 .async_readv = smb2_async_readv,
4462 .async_writev = smb2_async_writev,
4463 .sync_read = smb2_sync_read,
4464 .sync_write = smb2_sync_write,
4465 .query_dir_first = smb2_query_dir_first,
4466 .query_dir_next = smb2_query_dir_next,
4467 .close_dir = smb2_close_dir,
4468 .calc_smb_size = smb2_calc_size,
4469 .is_status_pending = smb2_is_status_pending,
4470 .is_session_expired = smb2_is_session_expired,
4471 .oplock_response = smb2_oplock_response,
4472 .queryfs = smb2_queryfs,
4473 .mand_lock = smb2_mand_lock,
4474 .mand_unlock_range = smb2_unlock_range,
4475 .push_mand_locks = smb2_push_mandatory_locks,
4476 .get_lease_key = smb2_get_lease_key,
4477 .set_lease_key = smb2_set_lease_key,
4478 .new_lease_key = smb2_new_lease_key,
4479 .calc_signature = smb2_calc_signature,
4480 .is_read_op = smb21_is_read_op,
4481 .set_oplock_level = smb21_set_oplock_level,
4482 .create_lease_buf = smb2_create_lease_buf,
4483 .parse_lease_buf = smb2_parse_lease_buf,
4484 .copychunk_range = smb2_copychunk_range,
4485 .wp_retry_size = smb2_wp_retry_size,
4486 .dir_needs_close = smb2_dir_needs_close,
4487 .enum_snapshots = smb3_enum_snapshots,
4488 .get_dfs_refer = smb2_get_dfs_refer,
4489 .select_sectype = smb2_select_sectype,
4490 #ifdef CONFIG_CIFS_XATTR
4491 .query_all_EAs = smb2_query_eas,
4492 .set_EA = smb2_set_ea,
4493 #endif /* CIFS_XATTR */
4494 .get_acl = get_smb2_acl,
4495 .get_acl_by_fid = get_smb2_acl_by_fid,
4496 .set_acl = set_smb2_acl,
4497 .next_header = smb2_next_header,
4498 .ioctl_query_info = smb2_ioctl_query_info,
4499 .make_node = smb2_make_node,
4500 .fiemap = smb3_fiemap,
4501 .llseek = smb3_llseek,
4502 };
4503
4504 struct smb_version_operations smb30_operations = {
4505 .compare_fids = smb2_compare_fids,
4506 .setup_request = smb2_setup_request,
4507 .setup_async_request = smb2_setup_async_request,
4508 .check_receive = smb2_check_receive,
4509 .add_credits = smb2_add_credits,
4510 .set_credits = smb2_set_credits,
4511 .get_credits_field = smb2_get_credits_field,
4512 .get_credits = smb2_get_credits,
4513 .wait_mtu_credits = smb2_wait_mtu_credits,
4514 .adjust_credits = smb2_adjust_credits,
4515 .get_next_mid = smb2_get_next_mid,
4516 .revert_current_mid = smb2_revert_current_mid,
4517 .read_data_offset = smb2_read_data_offset,
4518 .read_data_length = smb2_read_data_length,
4519 .map_error = map_smb2_to_linux_error,
4520 .find_mid = smb2_find_mid,
4521 .check_message = smb2_check_message,
4522 .dump_detail = smb2_dump_detail,
4523 .clear_stats = smb2_clear_stats,
4524 .print_stats = smb2_print_stats,
4525 .dump_share_caps = smb2_dump_share_caps,
4526 .is_oplock_break = smb2_is_valid_oplock_break,
4527 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4528 .downgrade_oplock = smb21_downgrade_oplock,
4529 .need_neg = smb2_need_neg,
4530 .negotiate = smb2_negotiate,
4531 .negotiate_wsize = smb3_negotiate_wsize,
4532 .negotiate_rsize = smb3_negotiate_rsize,
4533 .sess_setup = SMB2_sess_setup,
4534 .logoff = SMB2_logoff,
4535 .tree_connect = SMB2_tcon,
4536 .tree_disconnect = SMB2_tdis,
4537 .qfs_tcon = smb3_qfs_tcon,
4538 .is_path_accessible = smb2_is_path_accessible,
4539 .can_echo = smb2_can_echo,
4540 .echo = SMB2_echo,
4541 .query_path_info = smb2_query_path_info,
4542 .get_srv_inum = smb2_get_srv_inum,
4543 .query_file_info = smb2_query_file_info,
4544 .set_path_size = smb2_set_path_size,
4545 .set_file_size = smb2_set_file_size,
4546 .set_file_info = smb2_set_file_info,
4547 .set_compression = smb2_set_compression,
4548 .mkdir = smb2_mkdir,
4549 .mkdir_setinfo = smb2_mkdir_setinfo,
4550 .rmdir = smb2_rmdir,
4551 .unlink = smb2_unlink,
4552 .rename = smb2_rename_path,
4553 .create_hardlink = smb2_create_hardlink,
4554 .query_symlink = smb2_query_symlink,
4555 .query_mf_symlink = smb3_query_mf_symlink,
4556 .create_mf_symlink = smb3_create_mf_symlink,
4557 .open = smb2_open_file,
4558 .set_fid = smb2_set_fid,
4559 .close = smb2_close_file,
4560 .flush = smb2_flush_file,
4561 .async_readv = smb2_async_readv,
4562 .async_writev = smb2_async_writev,
4563 .sync_read = smb2_sync_read,
4564 .sync_write = smb2_sync_write,
4565 .query_dir_first = smb2_query_dir_first,
4566 .query_dir_next = smb2_query_dir_next,
4567 .close_dir = smb2_close_dir,
4568 .calc_smb_size = smb2_calc_size,
4569 .is_status_pending = smb2_is_status_pending,
4570 .is_session_expired = smb2_is_session_expired,
4571 .oplock_response = smb2_oplock_response,
4572 .queryfs = smb2_queryfs,
4573 .mand_lock = smb2_mand_lock,
4574 .mand_unlock_range = smb2_unlock_range,
4575 .push_mand_locks = smb2_push_mandatory_locks,
4576 .get_lease_key = smb2_get_lease_key,
4577 .set_lease_key = smb2_set_lease_key,
4578 .new_lease_key = smb2_new_lease_key,
4579 .generate_signingkey = generate_smb30signingkey,
4580 .calc_signature = smb3_calc_signature,
4581 .set_integrity = smb3_set_integrity,
4582 .is_read_op = smb21_is_read_op,
4583 .set_oplock_level = smb3_set_oplock_level,
4584 .create_lease_buf = smb3_create_lease_buf,
4585 .parse_lease_buf = smb3_parse_lease_buf,
4586 .copychunk_range = smb2_copychunk_range,
4587 .duplicate_extents = smb2_duplicate_extents,
4588 .validate_negotiate = smb3_validate_negotiate,
4589 .wp_retry_size = smb2_wp_retry_size,
4590 .dir_needs_close = smb2_dir_needs_close,
4591 .fallocate = smb3_fallocate,
4592 .enum_snapshots = smb3_enum_snapshots,
4593 .init_transform_rq = smb3_init_transform_rq,
4594 .is_transform_hdr = smb3_is_transform_hdr,
4595 .receive_transform = smb3_receive_transform,
4596 .get_dfs_refer = smb2_get_dfs_refer,
4597 .select_sectype = smb2_select_sectype,
4598 #ifdef CONFIG_CIFS_XATTR
4599 .query_all_EAs = smb2_query_eas,
4600 .set_EA = smb2_set_ea,
4601 #endif /* CIFS_XATTR */
4602 .get_acl = get_smb2_acl,
4603 .get_acl_by_fid = get_smb2_acl_by_fid,
4604 .set_acl = set_smb2_acl,
4605 .next_header = smb2_next_header,
4606 .ioctl_query_info = smb2_ioctl_query_info,
4607 .make_node = smb2_make_node,
4608 .fiemap = smb3_fiemap,
4609 .llseek = smb3_llseek,
4610 };
4611
4612 struct smb_version_operations smb311_operations = {
4613 .compare_fids = smb2_compare_fids,
4614 .setup_request = smb2_setup_request,
4615 .setup_async_request = smb2_setup_async_request,
4616 .check_receive = smb2_check_receive,
4617 .add_credits = smb2_add_credits,
4618 .set_credits = smb2_set_credits,
4619 .get_credits_field = smb2_get_credits_field,
4620 .get_credits = smb2_get_credits,
4621 .wait_mtu_credits = smb2_wait_mtu_credits,
4622 .adjust_credits = smb2_adjust_credits,
4623 .get_next_mid = smb2_get_next_mid,
4624 .revert_current_mid = smb2_revert_current_mid,
4625 .read_data_offset = smb2_read_data_offset,
4626 .read_data_length = smb2_read_data_length,
4627 .map_error = map_smb2_to_linux_error,
4628 .find_mid = smb2_find_mid,
4629 .check_message = smb2_check_message,
4630 .dump_detail = smb2_dump_detail,
4631 .clear_stats = smb2_clear_stats,
4632 .print_stats = smb2_print_stats,
4633 .dump_share_caps = smb2_dump_share_caps,
4634 .is_oplock_break = smb2_is_valid_oplock_break,
4635 .handle_cancelled_mid = smb2_handle_cancelled_mid,
4636 .downgrade_oplock = smb21_downgrade_oplock,
4637 .need_neg = smb2_need_neg,
4638 .negotiate = smb2_negotiate,
4639 .negotiate_wsize = smb3_negotiate_wsize,
4640 .negotiate_rsize = smb3_negotiate_rsize,
4641 .sess_setup = SMB2_sess_setup,
4642 .logoff = SMB2_logoff,
4643 .tree_connect = SMB2_tcon,
4644 .tree_disconnect = SMB2_tdis,
4645 .qfs_tcon = smb3_qfs_tcon,
4646 .is_path_accessible = smb2_is_path_accessible,
4647 .can_echo = smb2_can_echo,
4648 .echo = SMB2_echo,
4649 .query_path_info = smb2_query_path_info,
4650 .get_srv_inum = smb2_get_srv_inum,
4651 .query_file_info = smb2_query_file_info,
4652 .set_path_size = smb2_set_path_size,
4653 .set_file_size = smb2_set_file_size,
4654 .set_file_info = smb2_set_file_info,
4655 .set_compression = smb2_set_compression,
4656 .mkdir = smb2_mkdir,
4657 .mkdir_setinfo = smb2_mkdir_setinfo,
4658 .posix_mkdir = smb311_posix_mkdir,
4659 .rmdir = smb2_rmdir,
4660 .unlink = smb2_unlink,
4661 .rename = smb2_rename_path,
4662 .create_hardlink = smb2_create_hardlink,
4663 .query_symlink = smb2_query_symlink,
4664 .query_mf_symlink = smb3_query_mf_symlink,
4665 .create_mf_symlink = smb3_create_mf_symlink,
4666 .open = smb2_open_file,
4667 .set_fid = smb2_set_fid,
4668 .close = smb2_close_file,
4669 .flush = smb2_flush_file,
4670 .async_readv = smb2_async_readv,
4671 .async_writev = smb2_async_writev,
4672 .sync_read = smb2_sync_read,
4673 .sync_write = smb2_sync_write,
4674 .query_dir_first = smb2_query_dir_first,
4675 .query_dir_next = smb2_query_dir_next,
4676 .close_dir = smb2_close_dir,
4677 .calc_smb_size = smb2_calc_size,
4678 .is_status_pending = smb2_is_status_pending,
4679 .is_session_expired = smb2_is_session_expired,
4680 .oplock_response = smb2_oplock_response,
4681 .queryfs = smb311_queryfs,
4682 .mand_lock = smb2_mand_lock,
4683 .mand_unlock_range = smb2_unlock_range,
4684 .push_mand_locks = smb2_push_mandatory_locks,
4685 .get_lease_key = smb2_get_lease_key,
4686 .set_lease_key = smb2_set_lease_key,
4687 .new_lease_key = smb2_new_lease_key,
4688 .generate_signingkey = generate_smb311signingkey,
4689 .calc_signature = smb3_calc_signature,
4690 .set_integrity = smb3_set_integrity,
4691 .is_read_op = smb21_is_read_op,
4692 .set_oplock_level = smb3_set_oplock_level,
4693 .create_lease_buf = smb3_create_lease_buf,
4694 .parse_lease_buf = smb3_parse_lease_buf,
4695 .copychunk_range = smb2_copychunk_range,
4696 .duplicate_extents = smb2_duplicate_extents,
4697 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
4698 .wp_retry_size = smb2_wp_retry_size,
4699 .dir_needs_close = smb2_dir_needs_close,
4700 .fallocate = smb3_fallocate,
4701 .enum_snapshots = smb3_enum_snapshots,
4702 .init_transform_rq = smb3_init_transform_rq,
4703 .is_transform_hdr = smb3_is_transform_hdr,
4704 .receive_transform = smb3_receive_transform,
4705 .get_dfs_refer = smb2_get_dfs_refer,
4706 .select_sectype = smb2_select_sectype,
4707 #ifdef CONFIG_CIFS_XATTR
4708 .query_all_EAs = smb2_query_eas,
4709 .set_EA = smb2_set_ea,
4710 #endif /* CIFS_XATTR */
4711 .get_acl = get_smb2_acl,
4712 .get_acl_by_fid = get_smb2_acl_by_fid,
4713 .set_acl = set_smb2_acl,
4714 .next_header = smb2_next_header,
4715 .ioctl_query_info = smb2_ioctl_query_info,
4716 .make_node = smb2_make_node,
4717 .fiemap = smb3_fiemap,
4718 .llseek = smb3_llseek,
4719 };
4720
4721 struct smb_version_values smb20_values = {
4722 .version_string = SMB20_VERSION_STRING,
4723 .protocol_id = SMB20_PROT_ID,
4724 .req_capabilities = 0, /* MBZ */
4725 .large_lock_type = 0,
4726 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4727 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4728 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4729 .header_size = sizeof(struct smb2_sync_hdr),
4730 .header_preamble_size = 0,
4731 .max_header_size = MAX_SMB2_HDR_SIZE,
4732 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4733 .lock_cmd = SMB2_LOCK,
4734 .cap_unix = 0,
4735 .cap_nt_find = SMB2_NT_FIND,
4736 .cap_large_files = SMB2_LARGE_FILES,
4737 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4738 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4739 .create_lease_size = sizeof(struct create_lease),
4740 };
4741
4742 struct smb_version_values smb21_values = {
4743 .version_string = SMB21_VERSION_STRING,
4744 .protocol_id = SMB21_PROT_ID,
4745 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
4746 .large_lock_type = 0,
4747 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4748 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4749 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4750 .header_size = sizeof(struct smb2_sync_hdr),
4751 .header_preamble_size = 0,
4752 .max_header_size = MAX_SMB2_HDR_SIZE,
4753 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4754 .lock_cmd = SMB2_LOCK,
4755 .cap_unix = 0,
4756 .cap_nt_find = SMB2_NT_FIND,
4757 .cap_large_files = SMB2_LARGE_FILES,
4758 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4759 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4760 .create_lease_size = sizeof(struct create_lease),
4761 };
4762
4763 struct smb_version_values smb3any_values = {
4764 .version_string = SMB3ANY_VERSION_STRING,
4765 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
4766 .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,
4767 .large_lock_type = 0,
4768 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4769 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4770 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4771 .header_size = sizeof(struct smb2_sync_hdr),
4772 .header_preamble_size = 0,
4773 .max_header_size = MAX_SMB2_HDR_SIZE,
4774 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4775 .lock_cmd = SMB2_LOCK,
4776 .cap_unix = 0,
4777 .cap_nt_find = SMB2_NT_FIND,
4778 .cap_large_files = SMB2_LARGE_FILES,
4779 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4780 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4781 .create_lease_size = sizeof(struct create_lease_v2),
4782 };
4783
4784 struct smb_version_values smbdefault_values = {
4785 .version_string = SMBDEFAULT_VERSION_STRING,
4786 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
4787 .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,
4788 .large_lock_type = 0,
4789 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4790 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4791 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4792 .header_size = sizeof(struct smb2_sync_hdr),
4793 .header_preamble_size = 0,
4794 .max_header_size = MAX_SMB2_HDR_SIZE,
4795 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4796 .lock_cmd = SMB2_LOCK,
4797 .cap_unix = 0,
4798 .cap_nt_find = SMB2_NT_FIND,
4799 .cap_large_files = SMB2_LARGE_FILES,
4800 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4801 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4802 .create_lease_size = sizeof(struct create_lease_v2),
4803 };
4804
4805 struct smb_version_values smb30_values = {
4806 .version_string = SMB30_VERSION_STRING,
4807 .protocol_id = SMB30_PROT_ID,
4808 .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,
4809 .large_lock_type = 0,
4810 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4811 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4812 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4813 .header_size = sizeof(struct smb2_sync_hdr),
4814 .header_preamble_size = 0,
4815 .max_header_size = MAX_SMB2_HDR_SIZE,
4816 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4817 .lock_cmd = SMB2_LOCK,
4818 .cap_unix = 0,
4819 .cap_nt_find = SMB2_NT_FIND,
4820 .cap_large_files = SMB2_LARGE_FILES,
4821 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4822 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4823 .create_lease_size = sizeof(struct create_lease_v2),
4824 };
4825
4826 struct smb_version_values smb302_values = {
4827 .version_string = SMB302_VERSION_STRING,
4828 .protocol_id = SMB302_PROT_ID,
4829 .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,
4830 .large_lock_type = 0,
4831 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4832 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4833 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4834 .header_size = sizeof(struct smb2_sync_hdr),
4835 .header_preamble_size = 0,
4836 .max_header_size = MAX_SMB2_HDR_SIZE,
4837 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4838 .lock_cmd = SMB2_LOCK,
4839 .cap_unix = 0,
4840 .cap_nt_find = SMB2_NT_FIND,
4841 .cap_large_files = SMB2_LARGE_FILES,
4842 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4843 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4844 .create_lease_size = sizeof(struct create_lease_v2),
4845 };
4846
4847 struct smb_version_values smb311_values = {
4848 .version_string = SMB311_VERSION_STRING,
4849 .protocol_id = SMB311_PROT_ID,
4850 .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,
4851 .large_lock_type = 0,
4852 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
4853 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
4854 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
4855 .header_size = sizeof(struct smb2_sync_hdr),
4856 .header_preamble_size = 0,
4857 .max_header_size = MAX_SMB2_HDR_SIZE,
4858 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
4859 .lock_cmd = SMB2_LOCK,
4860 .cap_unix = 0,
4861 .cap_nt_find = SMB2_NT_FIND,
4862 .cap_large_files = SMB2_LARGE_FILES,
4863 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
4864 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
4865 .create_lease_size = sizeof(struct create_lease_v2),
4866 };
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