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[thirdparty/kernel/stable.git] / fs / cifs / smb2ops.c
1 /*
2 * SMB2 version specific operations
3 *
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
5 *
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include <linux/pagemap.h>
21 #include <linux/vfs.h>
22 #include <linux/falloc.h>
23 #include <linux/scatterlist.h>
24 #include <linux/uuid.h>
25 #include <crypto/aead.h>
26 #include "cifsglob.h"
27 #include "smb2pdu.h"
28 #include "smb2proto.h"
29 #include "cifsproto.h"
30 #include "cifs_debug.h"
31 #include "cifs_unicode.h"
32 #include "smb2status.h"
33 #include "smb2glob.h"
34 #include "cifs_ioctl.h"
35 #include "smbdirect.h"
36
37 static int
38 change_conf(struct TCP_Server_Info *server)
39 {
40 server->credits += server->echo_credits + server->oplock_credits;
41 server->oplock_credits = server->echo_credits = 0;
42 switch (server->credits) {
43 case 0:
44 return -1;
45 case 1:
46 server->echoes = false;
47 server->oplocks = false;
48 cifs_dbg(VFS, "disabling echoes and oplocks\n");
49 break;
50 case 2:
51 server->echoes = true;
52 server->oplocks = false;
53 server->echo_credits = 1;
54 cifs_dbg(FYI, "disabling oplocks\n");
55 break;
56 default:
57 server->echoes = true;
58 if (enable_oplocks) {
59 server->oplocks = true;
60 server->oplock_credits = 1;
61 } else
62 server->oplocks = false;
63
64 server->echo_credits = 1;
65 }
66 server->credits -= server->echo_credits + server->oplock_credits;
67 return 0;
68 }
69
70 static void
71 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
72 const int optype)
73 {
74 int *val, rc = 0;
75 spin_lock(&server->req_lock);
76 val = server->ops->get_credits_field(server, optype);
77 *val += add;
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 if (rc)
99 cifs_reconnect(server);
100 }
101
102 static void
103 smb2_set_credits(struct TCP_Server_Info *server, const int val)
104 {
105 spin_lock(&server->req_lock);
106 server->credits = val;
107 spin_unlock(&server->req_lock);
108 }
109
110 static int *
111 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
112 {
113 switch (optype) {
114 case CIFS_ECHO_OP:
115 return &server->echo_credits;
116 case CIFS_OBREAK_OP:
117 return &server->oplock_credits;
118 default:
119 return &server->credits;
120 }
121 }
122
123 static unsigned int
124 smb2_get_credits(struct mid_q_entry *mid)
125 {
126 struct smb2_sync_hdr *shdr = get_sync_hdr(mid->resp_buf);
127
128 return le16_to_cpu(shdr->CreditRequest);
129 }
130
131 static int
132 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
133 unsigned int *num, unsigned int *credits)
134 {
135 int rc = 0;
136 unsigned int scredits;
137
138 spin_lock(&server->req_lock);
139 while (1) {
140 if (server->credits <= 0) {
141 spin_unlock(&server->req_lock);
142 cifs_num_waiters_inc(server);
143 rc = wait_event_killable(server->request_q,
144 has_credits(server, &server->credits));
145 cifs_num_waiters_dec(server);
146 if (rc)
147 return rc;
148 spin_lock(&server->req_lock);
149 } else {
150 if (server->tcpStatus == CifsExiting) {
151 spin_unlock(&server->req_lock);
152 return -ENOENT;
153 }
154
155 scredits = server->credits;
156 /* can deadlock with reopen */
157 if (scredits == 1) {
158 *num = SMB2_MAX_BUFFER_SIZE;
159 *credits = 0;
160 break;
161 }
162
163 /* leave one credit for a possible reopen */
164 scredits--;
165 *num = min_t(unsigned int, size,
166 scredits * SMB2_MAX_BUFFER_SIZE);
167
168 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
169 server->credits -= *credits;
170 server->in_flight++;
171 break;
172 }
173 }
174 spin_unlock(&server->req_lock);
175 return rc;
176 }
177
178 static __u64
179 smb2_get_next_mid(struct TCP_Server_Info *server)
180 {
181 __u64 mid;
182 /* for SMB2 we need the current value */
183 spin_lock(&GlobalMid_Lock);
184 mid = server->CurrentMid++;
185 spin_unlock(&GlobalMid_Lock);
186 return mid;
187 }
188
189 static struct mid_q_entry *
190 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
191 {
192 struct mid_q_entry *mid;
193 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
194 __u64 wire_mid = le64_to_cpu(shdr->MessageId);
195
196 if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
197 cifs_dbg(VFS, "encrypted frame parsing not supported yet");
198 return NULL;
199 }
200
201 spin_lock(&GlobalMid_Lock);
202 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
203 if ((mid->mid == wire_mid) &&
204 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
205 (mid->command == shdr->Command)) {
206 spin_unlock(&GlobalMid_Lock);
207 return mid;
208 }
209 }
210 spin_unlock(&GlobalMid_Lock);
211 return NULL;
212 }
213
214 static void
215 smb2_dump_detail(void *buf)
216 {
217 #ifdef CONFIG_CIFS_DEBUG2
218 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
219
220 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
221 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
222 shdr->ProcessId);
223 cifs_dbg(VFS, "smb buf %p len %u\n", buf, smb2_calc_size(buf));
224 #endif
225 }
226
227 static bool
228 smb2_need_neg(struct TCP_Server_Info *server)
229 {
230 return server->max_read == 0;
231 }
232
233 static int
234 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
235 {
236 int rc;
237 ses->server->CurrentMid = 0;
238 rc = SMB2_negotiate(xid, ses);
239 /* BB we probably don't need to retry with modern servers */
240 if (rc == -EAGAIN)
241 rc = -EHOSTDOWN;
242 return rc;
243 }
244
245 static unsigned int
246 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
247 {
248 struct TCP_Server_Info *server = tcon->ses->server;
249 unsigned int wsize;
250
251 /* start with specified wsize, or default */
252 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
253 wsize = min_t(unsigned int, wsize, server->max_write);
254 #ifdef CONFIG_CIFS_SMB_DIRECT
255 if (server->rdma) {
256 if (server->sign)
257 wsize = min_t(unsigned int,
258 wsize, server->smbd_conn->max_fragmented_send_size);
259 else
260 wsize = min_t(unsigned int,
261 wsize, server->smbd_conn->max_readwrite_size);
262 }
263 #endif
264 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
265 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
266
267 return wsize;
268 }
269
270 static unsigned int
271 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
272 {
273 struct TCP_Server_Info *server = tcon->ses->server;
274 unsigned int rsize;
275
276 /* start with specified rsize, or default */
277 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
278 rsize = min_t(unsigned int, rsize, server->max_read);
279 #ifdef CONFIG_CIFS_SMB_DIRECT
280 if (server->rdma) {
281 if (server->sign)
282 rsize = min_t(unsigned int,
283 rsize, server->smbd_conn->max_fragmented_recv_size);
284 else
285 rsize = min_t(unsigned int,
286 rsize, server->smbd_conn->max_readwrite_size);
287 }
288 #endif
289
290 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
291 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
292
293 return rsize;
294 }
295
296 #ifdef CONFIG_CIFS_STATS2
297 static int
298 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
299 {
300 int rc;
301 unsigned int ret_data_len = 0;
302 struct network_interface_info_ioctl_rsp *out_buf;
303
304 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
305 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
306 NULL /* no data input */, 0 /* no data input */,
307 (char **)&out_buf, &ret_data_len);
308 if (rc != 0)
309 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
310 else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
311 cifs_dbg(VFS, "server returned bad net interface info buf\n");
312 rc = -EINVAL;
313 } else {
314 /* Dump info on first interface */
315 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
316 le32_to_cpu(out_buf->Capability));
317 cifs_dbg(FYI, "Link Speed %lld\n",
318 le64_to_cpu(out_buf->LinkSpeed));
319 }
320 kfree(out_buf);
321 return rc;
322 }
323 #endif /* STATS2 */
324
325 static void
326 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
327 {
328 int rc;
329 __le16 srch_path = 0; /* Null - open root of share */
330 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
331 struct cifs_open_parms oparms;
332 struct cifs_fid fid;
333
334 oparms.tcon = tcon;
335 oparms.desired_access = FILE_READ_ATTRIBUTES;
336 oparms.disposition = FILE_OPEN;
337 oparms.create_options = 0;
338 oparms.fid = &fid;
339 oparms.reconnect = false;
340
341 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
342 if (rc)
343 return;
344
345 #ifdef CONFIG_CIFS_STATS2
346 SMB3_request_interfaces(xid, tcon);
347 #endif /* STATS2 */
348
349 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
350 FS_ATTRIBUTE_INFORMATION);
351 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
352 FS_DEVICE_INFORMATION);
353 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
354 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
355 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
356 return;
357 }
358
359 static void
360 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
361 {
362 int rc;
363 __le16 srch_path = 0; /* Null - open root of share */
364 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
365 struct cifs_open_parms oparms;
366 struct cifs_fid fid;
367
368 oparms.tcon = tcon;
369 oparms.desired_access = FILE_READ_ATTRIBUTES;
370 oparms.disposition = FILE_OPEN;
371 oparms.create_options = 0;
372 oparms.fid = &fid;
373 oparms.reconnect = false;
374
375 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
376 if (rc)
377 return;
378
379 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
380 FS_ATTRIBUTE_INFORMATION);
381 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
382 FS_DEVICE_INFORMATION);
383 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
384 return;
385 }
386
387 static int
388 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
389 struct cifs_sb_info *cifs_sb, const char *full_path)
390 {
391 int rc;
392 __le16 *utf16_path;
393 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
394 struct cifs_open_parms oparms;
395 struct cifs_fid fid;
396
397 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
398 if (!utf16_path)
399 return -ENOMEM;
400
401 oparms.tcon = tcon;
402 oparms.desired_access = FILE_READ_ATTRIBUTES;
403 oparms.disposition = FILE_OPEN;
404 oparms.create_options = 0;
405 oparms.fid = &fid;
406 oparms.reconnect = false;
407
408 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
409 if (rc) {
410 kfree(utf16_path);
411 return rc;
412 }
413
414 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
415 kfree(utf16_path);
416 return rc;
417 }
418
419 static int
420 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
421 struct cifs_sb_info *cifs_sb, const char *full_path,
422 u64 *uniqueid, FILE_ALL_INFO *data)
423 {
424 *uniqueid = le64_to_cpu(data->IndexNumber);
425 return 0;
426 }
427
428 static int
429 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
430 struct cifs_fid *fid, FILE_ALL_INFO *data)
431 {
432 int rc;
433 struct smb2_file_all_info *smb2_data;
434
435 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
436 GFP_KERNEL);
437 if (smb2_data == NULL)
438 return -ENOMEM;
439
440 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
441 smb2_data);
442 if (!rc)
443 move_smb2_info_to_cifs(data, smb2_data);
444 kfree(smb2_data);
445 return rc;
446 }
447
448 #ifdef CONFIG_CIFS_XATTR
449 static ssize_t
450 move_smb2_ea_to_cifs(char *dst, size_t dst_size,
451 struct smb2_file_full_ea_info *src, size_t src_size,
452 const unsigned char *ea_name)
453 {
454 int rc = 0;
455 unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0;
456 char *name, *value;
457 size_t name_len, value_len, user_name_len;
458
459 while (src_size > 0) {
460 name = &src->ea_data[0];
461 name_len = (size_t)src->ea_name_length;
462 value = &src->ea_data[src->ea_name_length + 1];
463 value_len = (size_t)le16_to_cpu(src->ea_value_length);
464
465 if (name_len == 0) {
466 break;
467 }
468
469 if (src_size < 8 + name_len + 1 + value_len) {
470 cifs_dbg(FYI, "EA entry goes beyond length of list\n");
471 rc = -EIO;
472 goto out;
473 }
474
475 if (ea_name) {
476 if (ea_name_len == name_len &&
477 memcmp(ea_name, name, name_len) == 0) {
478 rc = value_len;
479 if (dst_size == 0)
480 goto out;
481 if (dst_size < value_len) {
482 rc = -ERANGE;
483 goto out;
484 }
485 memcpy(dst, value, value_len);
486 goto out;
487 }
488 } else {
489 /* 'user.' plus a terminating null */
490 user_name_len = 5 + 1 + name_len;
491
492 rc += user_name_len;
493
494 if (dst_size >= user_name_len) {
495 dst_size -= user_name_len;
496 memcpy(dst, "user.", 5);
497 dst += 5;
498 memcpy(dst, src->ea_data, name_len);
499 dst += name_len;
500 *dst = 0;
501 ++dst;
502 } else if (dst_size == 0) {
503 /* skip copy - calc size only */
504 } else {
505 /* stop before overrun buffer */
506 rc = -ERANGE;
507 break;
508 }
509 }
510
511 if (!src->next_entry_offset)
512 break;
513
514 if (src_size < le32_to_cpu(src->next_entry_offset)) {
515 /* stop before overrun buffer */
516 rc = -ERANGE;
517 break;
518 }
519 src_size -= le32_to_cpu(src->next_entry_offset);
520 src = (void *)((char *)src +
521 le32_to_cpu(src->next_entry_offset));
522 }
523
524 /* didn't find the named attribute */
525 if (ea_name)
526 rc = -ENODATA;
527
528 out:
529 return (ssize_t)rc;
530 }
531
532 static ssize_t
533 smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
534 const unsigned char *path, const unsigned char *ea_name,
535 char *ea_data, size_t buf_size,
536 struct cifs_sb_info *cifs_sb)
537 {
538 int rc;
539 __le16 *utf16_path;
540 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
541 struct cifs_open_parms oparms;
542 struct cifs_fid fid;
543 struct smb2_file_full_ea_info *smb2_data;
544 int ea_buf_size = SMB2_MIN_EA_BUF;
545
546 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
547 if (!utf16_path)
548 return -ENOMEM;
549
550 oparms.tcon = tcon;
551 oparms.desired_access = FILE_READ_EA;
552 oparms.disposition = FILE_OPEN;
553 oparms.create_options = 0;
554 oparms.fid = &fid;
555 oparms.reconnect = false;
556
557 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
558 kfree(utf16_path);
559 if (rc) {
560 cifs_dbg(FYI, "open failed rc=%d\n", rc);
561 return rc;
562 }
563
564 while (1) {
565 smb2_data = kzalloc(ea_buf_size, GFP_KERNEL);
566 if (smb2_data == NULL) {
567 SMB2_close(xid, tcon, fid.persistent_fid,
568 fid.volatile_fid);
569 return -ENOMEM;
570 }
571
572 rc = SMB2_query_eas(xid, tcon, fid.persistent_fid,
573 fid.volatile_fid,
574 ea_buf_size, smb2_data);
575
576 if (rc != -E2BIG)
577 break;
578
579 kfree(smb2_data);
580 ea_buf_size <<= 1;
581
582 if (ea_buf_size > SMB2_MAX_EA_BUF) {
583 cifs_dbg(VFS, "EA size is too large\n");
584 SMB2_close(xid, tcon, fid.persistent_fid,
585 fid.volatile_fid);
586 return -ENOMEM;
587 }
588 }
589
590 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
591
592 /*
593 * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
594 * not an error. Otherwise, the specified ea_name was not found.
595 */
596 if (!rc)
597 rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
598 SMB2_MAX_EA_BUF, ea_name);
599 else if (!ea_name && rc == -ENODATA)
600 rc = 0;
601
602 kfree(smb2_data);
603 return rc;
604 }
605
606
607 static int
608 smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
609 const char *path, const char *ea_name, const void *ea_value,
610 const __u16 ea_value_len, const struct nls_table *nls_codepage,
611 struct cifs_sb_info *cifs_sb)
612 {
613 int rc;
614 __le16 *utf16_path;
615 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
616 struct cifs_open_parms oparms;
617 struct cifs_fid fid;
618 struct smb2_file_full_ea_info *ea;
619 int ea_name_len = strlen(ea_name);
620 int len;
621
622 if (ea_name_len > 255)
623 return -EINVAL;
624
625 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
626 if (!utf16_path)
627 return -ENOMEM;
628
629 oparms.tcon = tcon;
630 oparms.desired_access = FILE_WRITE_EA;
631 oparms.disposition = FILE_OPEN;
632 oparms.create_options = 0;
633 oparms.fid = &fid;
634 oparms.reconnect = false;
635
636 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
637 kfree(utf16_path);
638 if (rc) {
639 cifs_dbg(FYI, "open failed rc=%d\n", rc);
640 return rc;
641 }
642
643 len = sizeof(ea) + ea_name_len + ea_value_len + 1;
644 ea = kzalloc(len, GFP_KERNEL);
645 if (ea == NULL) {
646 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
647 return -ENOMEM;
648 }
649
650 ea->ea_name_length = ea_name_len;
651 ea->ea_value_length = cpu_to_le16(ea_value_len);
652 memcpy(ea->ea_data, ea_name, ea_name_len + 1);
653 memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len);
654
655 rc = SMB2_set_ea(xid, tcon, fid.persistent_fid, fid.volatile_fid, ea,
656 len);
657 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
658
659 return rc;
660 }
661 #endif
662
663 static bool
664 smb2_can_echo(struct TCP_Server_Info *server)
665 {
666 return server->echoes;
667 }
668
669 static void
670 smb2_clear_stats(struct cifs_tcon *tcon)
671 {
672 #ifdef CONFIG_CIFS_STATS
673 int i;
674 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
675 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
676 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
677 }
678 #endif
679 }
680
681 static void
682 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
683 {
684 seq_puts(m, "\n\tShare Capabilities:");
685 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
686 seq_puts(m, " DFS,");
687 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
688 seq_puts(m, " CONTINUOUS AVAILABILITY,");
689 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
690 seq_puts(m, " SCALEOUT,");
691 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
692 seq_puts(m, " CLUSTER,");
693 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
694 seq_puts(m, " ASYMMETRIC,");
695 if (tcon->capabilities == 0)
696 seq_puts(m, " None");
697 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
698 seq_puts(m, " Aligned,");
699 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
700 seq_puts(m, " Partition Aligned,");
701 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
702 seq_puts(m, " SSD,");
703 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
704 seq_puts(m, " TRIM-support,");
705
706 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
707 if (tcon->perf_sector_size)
708 seq_printf(m, "\tOptimal sector size: 0x%x",
709 tcon->perf_sector_size);
710 }
711
712 static void
713 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
714 {
715 #ifdef CONFIG_CIFS_STATS
716 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
717 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
718 seq_printf(m, "\nNegotiates: %d sent %d failed",
719 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
720 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
721 seq_printf(m, "\nSessionSetups: %d sent %d failed",
722 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
723 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
724 seq_printf(m, "\nLogoffs: %d sent %d failed",
725 atomic_read(&sent[SMB2_LOGOFF_HE]),
726 atomic_read(&failed[SMB2_LOGOFF_HE]));
727 seq_printf(m, "\nTreeConnects: %d sent %d failed",
728 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
729 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
730 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
731 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
732 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
733 seq_printf(m, "\nCreates: %d sent %d failed",
734 atomic_read(&sent[SMB2_CREATE_HE]),
735 atomic_read(&failed[SMB2_CREATE_HE]));
736 seq_printf(m, "\nCloses: %d sent %d failed",
737 atomic_read(&sent[SMB2_CLOSE_HE]),
738 atomic_read(&failed[SMB2_CLOSE_HE]));
739 seq_printf(m, "\nFlushes: %d sent %d failed",
740 atomic_read(&sent[SMB2_FLUSH_HE]),
741 atomic_read(&failed[SMB2_FLUSH_HE]));
742 seq_printf(m, "\nReads: %d sent %d failed",
743 atomic_read(&sent[SMB2_READ_HE]),
744 atomic_read(&failed[SMB2_READ_HE]));
745 seq_printf(m, "\nWrites: %d sent %d failed",
746 atomic_read(&sent[SMB2_WRITE_HE]),
747 atomic_read(&failed[SMB2_WRITE_HE]));
748 seq_printf(m, "\nLocks: %d sent %d failed",
749 atomic_read(&sent[SMB2_LOCK_HE]),
750 atomic_read(&failed[SMB2_LOCK_HE]));
751 seq_printf(m, "\nIOCTLs: %d sent %d failed",
752 atomic_read(&sent[SMB2_IOCTL_HE]),
753 atomic_read(&failed[SMB2_IOCTL_HE]));
754 seq_printf(m, "\nCancels: %d sent %d failed",
755 atomic_read(&sent[SMB2_CANCEL_HE]),
756 atomic_read(&failed[SMB2_CANCEL_HE]));
757 seq_printf(m, "\nEchos: %d sent %d failed",
758 atomic_read(&sent[SMB2_ECHO_HE]),
759 atomic_read(&failed[SMB2_ECHO_HE]));
760 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
761 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
762 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
763 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
764 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
765 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
766 seq_printf(m, "\nQueryInfos: %d sent %d failed",
767 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
768 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
769 seq_printf(m, "\nSetInfos: %d sent %d failed",
770 atomic_read(&sent[SMB2_SET_INFO_HE]),
771 atomic_read(&failed[SMB2_SET_INFO_HE]));
772 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
773 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
774 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
775 #endif
776 }
777
778 static void
779 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
780 {
781 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
782 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
783
784 cfile->fid.persistent_fid = fid->persistent_fid;
785 cfile->fid.volatile_fid = fid->volatile_fid;
786 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
787 &fid->purge_cache);
788 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
789 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
790 }
791
792 static void
793 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
794 struct cifs_fid *fid)
795 {
796 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
797 }
798
799 static int
800 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
801 u64 persistent_fid, u64 volatile_fid,
802 struct copychunk_ioctl *pcchunk)
803 {
804 int rc;
805 unsigned int ret_data_len;
806 struct resume_key_req *res_key;
807
808 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
809 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
810 NULL, 0 /* no input */,
811 (char **)&res_key, &ret_data_len);
812
813 if (rc) {
814 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
815 goto req_res_key_exit;
816 }
817 if (ret_data_len < sizeof(struct resume_key_req)) {
818 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
819 rc = -EINVAL;
820 goto req_res_key_exit;
821 }
822 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
823
824 req_res_key_exit:
825 kfree(res_key);
826 return rc;
827 }
828
829 static ssize_t
830 smb2_copychunk_range(const unsigned int xid,
831 struct cifsFileInfo *srcfile,
832 struct cifsFileInfo *trgtfile, u64 src_off,
833 u64 len, u64 dest_off)
834 {
835 int rc;
836 unsigned int ret_data_len;
837 struct copychunk_ioctl *pcchunk;
838 struct copychunk_ioctl_rsp *retbuf = NULL;
839 struct cifs_tcon *tcon;
840 int chunks_copied = 0;
841 bool chunk_sizes_updated = false;
842 ssize_t bytes_written, total_bytes_written = 0;
843
844 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
845
846 if (pcchunk == NULL)
847 return -ENOMEM;
848
849 cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
850 /* Request a key from the server to identify the source of the copy */
851 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
852 srcfile->fid.persistent_fid,
853 srcfile->fid.volatile_fid, pcchunk);
854
855 /* Note: request_res_key sets res_key null only if rc !=0 */
856 if (rc)
857 goto cchunk_out;
858
859 /* For now array only one chunk long, will make more flexible later */
860 pcchunk->ChunkCount = cpu_to_le32(1);
861 pcchunk->Reserved = 0;
862 pcchunk->Reserved2 = 0;
863
864 tcon = tlink_tcon(trgtfile->tlink);
865
866 while (len > 0) {
867 pcchunk->SourceOffset = cpu_to_le64(src_off);
868 pcchunk->TargetOffset = cpu_to_le64(dest_off);
869 pcchunk->Length =
870 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
871
872 /* Request server copy to target from src identified by key */
873 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
874 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
875 true /* is_fsctl */, (char *)pcchunk,
876 sizeof(struct copychunk_ioctl), (char **)&retbuf,
877 &ret_data_len);
878 if (rc == 0) {
879 if (ret_data_len !=
880 sizeof(struct copychunk_ioctl_rsp)) {
881 cifs_dbg(VFS, "invalid cchunk response size\n");
882 rc = -EIO;
883 goto cchunk_out;
884 }
885 if (retbuf->TotalBytesWritten == 0) {
886 cifs_dbg(FYI, "no bytes copied\n");
887 rc = -EIO;
888 goto cchunk_out;
889 }
890 /*
891 * Check if server claimed to write more than we asked
892 */
893 if (le32_to_cpu(retbuf->TotalBytesWritten) >
894 le32_to_cpu(pcchunk->Length)) {
895 cifs_dbg(VFS, "invalid copy chunk response\n");
896 rc = -EIO;
897 goto cchunk_out;
898 }
899 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
900 cifs_dbg(VFS, "invalid num chunks written\n");
901 rc = -EIO;
902 goto cchunk_out;
903 }
904 chunks_copied++;
905
906 bytes_written = le32_to_cpu(retbuf->TotalBytesWritten);
907 src_off += bytes_written;
908 dest_off += bytes_written;
909 len -= bytes_written;
910 total_bytes_written += bytes_written;
911
912 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n",
913 le32_to_cpu(retbuf->ChunksWritten),
914 le32_to_cpu(retbuf->ChunkBytesWritten),
915 bytes_written);
916 } else if (rc == -EINVAL) {
917 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
918 goto cchunk_out;
919
920 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
921 le32_to_cpu(retbuf->ChunksWritten),
922 le32_to_cpu(retbuf->ChunkBytesWritten),
923 le32_to_cpu(retbuf->TotalBytesWritten));
924
925 /*
926 * Check if this is the first request using these sizes,
927 * (ie check if copy succeed once with original sizes
928 * and check if the server gave us different sizes after
929 * we already updated max sizes on previous request).
930 * if not then why is the server returning an error now
931 */
932 if ((chunks_copied != 0) || chunk_sizes_updated)
933 goto cchunk_out;
934
935 /* Check that server is not asking us to grow size */
936 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
937 tcon->max_bytes_chunk)
938 tcon->max_bytes_chunk =
939 le32_to_cpu(retbuf->ChunkBytesWritten);
940 else
941 goto cchunk_out; /* server gave us bogus size */
942
943 /* No need to change MaxChunks since already set to 1 */
944 chunk_sizes_updated = true;
945 } else
946 goto cchunk_out;
947 }
948
949 cchunk_out:
950 kfree(pcchunk);
951 kfree(retbuf);
952 if (rc)
953 return rc;
954 else
955 return total_bytes_written;
956 }
957
958 static int
959 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
960 struct cifs_fid *fid)
961 {
962 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
963 }
964
965 static unsigned int
966 smb2_read_data_offset(char *buf)
967 {
968 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
969 return rsp->DataOffset;
970 }
971
972 static unsigned int
973 smb2_read_data_length(char *buf, bool in_remaining)
974 {
975 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
976
977 if (in_remaining)
978 return le32_to_cpu(rsp->DataRemaining);
979
980 return le32_to_cpu(rsp->DataLength);
981 }
982
983
984 static int
985 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
986 struct cifs_io_parms *parms, unsigned int *bytes_read,
987 char **buf, int *buf_type)
988 {
989 parms->persistent_fid = pfid->persistent_fid;
990 parms->volatile_fid = pfid->volatile_fid;
991 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
992 }
993
994 static int
995 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
996 struct cifs_io_parms *parms, unsigned int *written,
997 struct kvec *iov, unsigned long nr_segs)
998 {
999
1000 parms->persistent_fid = pfid->persistent_fid;
1001 parms->volatile_fid = pfid->volatile_fid;
1002 return SMB2_write(xid, parms, written, iov, nr_segs);
1003 }
1004
1005 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
1006 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
1007 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
1008 {
1009 struct cifsInodeInfo *cifsi;
1010 int rc;
1011
1012 cifsi = CIFS_I(inode);
1013
1014 /* if file already sparse don't bother setting sparse again */
1015 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
1016 return true; /* already sparse */
1017
1018 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
1019 return true; /* already not sparse */
1020
1021 /*
1022 * Can't check for sparse support on share the usual way via the
1023 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
1024 * since Samba server doesn't set the flag on the share, yet
1025 * supports the set sparse FSCTL and returns sparse correctly
1026 * in the file attributes. If we fail setting sparse though we
1027 * mark that server does not support sparse files for this share
1028 * to avoid repeatedly sending the unsupported fsctl to server
1029 * if the file is repeatedly extended.
1030 */
1031 if (tcon->broken_sparse_sup)
1032 return false;
1033
1034 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1035 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
1036 true /* is_fctl */,
1037 &setsparse, 1, NULL, NULL);
1038 if (rc) {
1039 tcon->broken_sparse_sup = true;
1040 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
1041 return false;
1042 }
1043
1044 if (setsparse)
1045 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
1046 else
1047 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
1048
1049 return true;
1050 }
1051
1052 static int
1053 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
1054 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
1055 {
1056 __le64 eof = cpu_to_le64(size);
1057 struct inode *inode;
1058
1059 /*
1060 * If extending file more than one page make sparse. Many Linux fs
1061 * make files sparse by default when extending via ftruncate
1062 */
1063 inode = d_inode(cfile->dentry);
1064
1065 if (!set_alloc && (size > inode->i_size + 8192)) {
1066 __u8 set_sparse = 1;
1067
1068 /* whether set sparse succeeds or not, extend the file */
1069 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
1070 }
1071
1072 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
1073 cfile->fid.volatile_fid, cfile->pid, &eof, false);
1074 }
1075
1076 static int
1077 smb2_duplicate_extents(const unsigned int xid,
1078 struct cifsFileInfo *srcfile,
1079 struct cifsFileInfo *trgtfile, u64 src_off,
1080 u64 len, u64 dest_off)
1081 {
1082 int rc;
1083 unsigned int ret_data_len;
1084 struct duplicate_extents_to_file dup_ext_buf;
1085 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
1086
1087 /* server fileays advertise duplicate extent support with this flag */
1088 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
1089 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
1090 return -EOPNOTSUPP;
1091
1092 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
1093 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
1094 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
1095 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
1096 dup_ext_buf.ByteCount = cpu_to_le64(len);
1097 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
1098 src_off, dest_off, len);
1099
1100 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
1101 if (rc)
1102 goto duplicate_extents_out;
1103
1104 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
1105 trgtfile->fid.volatile_fid,
1106 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
1107 true /* is_fsctl */,
1108 (char *)&dup_ext_buf,
1109 sizeof(struct duplicate_extents_to_file),
1110 NULL,
1111 &ret_data_len);
1112
1113 if (ret_data_len > 0)
1114 cifs_dbg(FYI, "non-zero response length in duplicate extents");
1115
1116 duplicate_extents_out:
1117 return rc;
1118 }
1119
1120 static int
1121 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
1122 struct cifsFileInfo *cfile)
1123 {
1124 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
1125 cfile->fid.volatile_fid);
1126 }
1127
1128 static int
1129 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
1130 struct cifsFileInfo *cfile)
1131 {
1132 struct fsctl_set_integrity_information_req integr_info;
1133 unsigned int ret_data_len;
1134
1135 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
1136 integr_info.Flags = 0;
1137 integr_info.Reserved = 0;
1138
1139 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1140 cfile->fid.volatile_fid,
1141 FSCTL_SET_INTEGRITY_INFORMATION,
1142 true /* is_fsctl */,
1143 (char *)&integr_info,
1144 sizeof(struct fsctl_set_integrity_information_req),
1145 NULL,
1146 &ret_data_len);
1147
1148 }
1149
1150 static int
1151 smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
1152 struct cifsFileInfo *cfile, void __user *ioc_buf)
1153 {
1154 char *retbuf = NULL;
1155 unsigned int ret_data_len = 0;
1156 int rc;
1157 struct smb_snapshot_array snapshot_in;
1158
1159 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1160 cfile->fid.volatile_fid,
1161 FSCTL_SRV_ENUMERATE_SNAPSHOTS,
1162 true /* is_fsctl */,
1163 NULL, 0 /* no input data */,
1164 (char **)&retbuf,
1165 &ret_data_len);
1166 cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
1167 rc, ret_data_len);
1168 if (rc)
1169 return rc;
1170
1171 if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) {
1172 /* Fixup buffer */
1173 if (copy_from_user(&snapshot_in, ioc_buf,
1174 sizeof(struct smb_snapshot_array))) {
1175 rc = -EFAULT;
1176 kfree(retbuf);
1177 return rc;
1178 }
1179 if (snapshot_in.snapshot_array_size < sizeof(struct smb_snapshot_array)) {
1180 rc = -ERANGE;
1181 kfree(retbuf);
1182 return rc;
1183 }
1184
1185 if (ret_data_len > snapshot_in.snapshot_array_size)
1186 ret_data_len = snapshot_in.snapshot_array_size;
1187
1188 if (copy_to_user(ioc_buf, retbuf, ret_data_len))
1189 rc = -EFAULT;
1190 }
1191
1192 kfree(retbuf);
1193 return rc;
1194 }
1195
1196 static int
1197 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
1198 const char *path, struct cifs_sb_info *cifs_sb,
1199 struct cifs_fid *fid, __u16 search_flags,
1200 struct cifs_search_info *srch_inf)
1201 {
1202 __le16 *utf16_path;
1203 int rc;
1204 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1205 struct cifs_open_parms oparms;
1206
1207 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1208 if (!utf16_path)
1209 return -ENOMEM;
1210
1211 oparms.tcon = tcon;
1212 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
1213 oparms.disposition = FILE_OPEN;
1214 oparms.create_options = 0;
1215 oparms.fid = fid;
1216 oparms.reconnect = false;
1217
1218 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1219 kfree(utf16_path);
1220 if (rc) {
1221 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
1222 return rc;
1223 }
1224
1225 srch_inf->entries_in_buffer = 0;
1226 srch_inf->index_of_last_entry = 0;
1227
1228 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
1229 fid->volatile_fid, 0, srch_inf);
1230 if (rc) {
1231 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
1232 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1233 }
1234 return rc;
1235 }
1236
1237 static int
1238 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
1239 struct cifs_fid *fid, __u16 search_flags,
1240 struct cifs_search_info *srch_inf)
1241 {
1242 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
1243 fid->volatile_fid, 0, srch_inf);
1244 }
1245
1246 static int
1247 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
1248 struct cifs_fid *fid)
1249 {
1250 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
1251 }
1252
1253 /*
1254 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
1255 * the number of credits and return true. Otherwise - return false.
1256 */
1257 static bool
1258 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
1259 {
1260 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1261
1262 if (shdr->Status != STATUS_PENDING)
1263 return false;
1264
1265 if (!length) {
1266 spin_lock(&server->req_lock);
1267 server->credits += le16_to_cpu(shdr->CreditRequest);
1268 spin_unlock(&server->req_lock);
1269 wake_up(&server->request_q);
1270 }
1271
1272 return true;
1273 }
1274
1275 static bool
1276 smb2_is_session_expired(char *buf)
1277 {
1278 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
1279
1280 if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
1281 return false;
1282
1283 cifs_dbg(FYI, "Session expired\n");
1284 return true;
1285 }
1286
1287 static int
1288 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
1289 struct cifsInodeInfo *cinode)
1290 {
1291 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
1292 return SMB2_lease_break(0, tcon, cinode->lease_key,
1293 smb2_get_lease_state(cinode));
1294
1295 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
1296 fid->volatile_fid,
1297 CIFS_CACHE_READ(cinode) ? 1 : 0);
1298 }
1299
1300 static int
1301 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
1302 struct kstatfs *buf)
1303 {
1304 int rc;
1305 __le16 srch_path = 0; /* Null - open root of share */
1306 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1307 struct cifs_open_parms oparms;
1308 struct cifs_fid fid;
1309
1310 oparms.tcon = tcon;
1311 oparms.desired_access = FILE_READ_ATTRIBUTES;
1312 oparms.disposition = FILE_OPEN;
1313 oparms.create_options = 0;
1314 oparms.fid = &fid;
1315 oparms.reconnect = false;
1316
1317 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1318 if (rc)
1319 return rc;
1320 buf->f_type = SMB2_MAGIC_NUMBER;
1321 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1322 buf);
1323 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1324 return rc;
1325 }
1326
1327 static bool
1328 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1329 {
1330 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1331 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1332 }
1333
1334 static int
1335 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1336 __u64 length, __u32 type, int lock, int unlock, bool wait)
1337 {
1338 if (unlock && !lock)
1339 type = SMB2_LOCKFLAG_UNLOCK;
1340 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1341 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1342 current->tgid, length, offset, type, wait);
1343 }
1344
1345 static void
1346 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1347 {
1348 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1349 }
1350
1351 static void
1352 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1353 {
1354 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1355 }
1356
1357 static void
1358 smb2_new_lease_key(struct cifs_fid *fid)
1359 {
1360 generate_random_uuid(fid->lease_key);
1361 }
1362
1363 static int
1364 smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
1365 const char *search_name,
1366 struct dfs_info3_param **target_nodes,
1367 unsigned int *num_of_nodes,
1368 const struct nls_table *nls_codepage, int remap)
1369 {
1370 int rc;
1371 __le16 *utf16_path = NULL;
1372 int utf16_path_len = 0;
1373 struct cifs_tcon *tcon;
1374 struct fsctl_get_dfs_referral_req *dfs_req = NULL;
1375 struct get_dfs_referral_rsp *dfs_rsp = NULL;
1376 u32 dfs_req_size = 0, dfs_rsp_size = 0;
1377
1378 cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
1379
1380 /*
1381 * Try to use the IPC tcon, otherwise just use any
1382 */
1383 tcon = ses->tcon_ipc;
1384 if (tcon == NULL) {
1385 spin_lock(&cifs_tcp_ses_lock);
1386 tcon = list_first_entry_or_null(&ses->tcon_list,
1387 struct cifs_tcon,
1388 tcon_list);
1389 if (tcon)
1390 tcon->tc_count++;
1391 spin_unlock(&cifs_tcp_ses_lock);
1392 }
1393
1394 if (tcon == NULL) {
1395 cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n",
1396 ses);
1397 rc = -ENOTCONN;
1398 goto out;
1399 }
1400
1401 utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX,
1402 &utf16_path_len,
1403 nls_codepage, remap);
1404 if (!utf16_path) {
1405 rc = -ENOMEM;
1406 goto out;
1407 }
1408
1409 dfs_req_size = sizeof(*dfs_req) + utf16_path_len;
1410 dfs_req = kzalloc(dfs_req_size, GFP_KERNEL);
1411 if (!dfs_req) {
1412 rc = -ENOMEM;
1413 goto out;
1414 }
1415
1416 /* Highest DFS referral version understood */
1417 dfs_req->MaxReferralLevel = DFS_VERSION;
1418
1419 /* Path to resolve in an UTF-16 null-terminated string */
1420 memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len);
1421
1422 do {
1423 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
1424 FSCTL_DFS_GET_REFERRALS,
1425 true /* is_fsctl */,
1426 (char *)dfs_req, dfs_req_size,
1427 (char **)&dfs_rsp, &dfs_rsp_size);
1428 } while (rc == -EAGAIN);
1429
1430 if (rc) {
1431 if (rc != -ENOENT)
1432 cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
1433 goto out;
1434 }
1435
1436 rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size,
1437 num_of_nodes, target_nodes,
1438 nls_codepage, remap, search_name,
1439 true /* is_unicode */);
1440 if (rc) {
1441 cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
1442 goto out;
1443 }
1444
1445 out:
1446 if (tcon && !tcon->ipc) {
1447 /* ipc tcons are not refcounted */
1448 spin_lock(&cifs_tcp_ses_lock);
1449 tcon->tc_count--;
1450 spin_unlock(&cifs_tcp_ses_lock);
1451 }
1452 kfree(utf16_path);
1453 kfree(dfs_req);
1454 kfree(dfs_rsp);
1455 return rc;
1456 }
1457 #define SMB2_SYMLINK_STRUCT_SIZE \
1458 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1459
1460 static int
1461 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1462 const char *full_path, char **target_path,
1463 struct cifs_sb_info *cifs_sb)
1464 {
1465 int rc;
1466 __le16 *utf16_path;
1467 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1468 struct cifs_open_parms oparms;
1469 struct cifs_fid fid;
1470 struct smb2_err_rsp *err_buf = NULL;
1471 struct smb2_symlink_err_rsp *symlink;
1472 unsigned int sub_len;
1473 unsigned int sub_offset;
1474 unsigned int print_len;
1475 unsigned int print_offset;
1476
1477 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1478
1479 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1480 if (!utf16_path)
1481 return -ENOMEM;
1482
1483 oparms.tcon = tcon;
1484 oparms.desired_access = FILE_READ_ATTRIBUTES;
1485 oparms.disposition = FILE_OPEN;
1486 oparms.create_options = 0;
1487 oparms.fid = &fid;
1488 oparms.reconnect = false;
1489
1490 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1491
1492 if (!rc || !err_buf) {
1493 kfree(utf16_path);
1494 return -ENOENT;
1495 }
1496
1497 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1498 get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1499 kfree(utf16_path);
1500 return -ENOENT;
1501 }
1502
1503 /* open must fail on symlink - reset rc */
1504 rc = 0;
1505 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1506 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1507 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1508 print_len = le16_to_cpu(symlink->PrintNameLength);
1509 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1510
1511 if (get_rfc1002_length(err_buf) + 4 <
1512 SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1513 kfree(utf16_path);
1514 return -ENOENT;
1515 }
1516
1517 if (get_rfc1002_length(err_buf) + 4 <
1518 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1519 kfree(utf16_path);
1520 return -ENOENT;
1521 }
1522
1523 *target_path = cifs_strndup_from_utf16(
1524 (char *)symlink->PathBuffer + sub_offset,
1525 sub_len, true, cifs_sb->local_nls);
1526 if (!(*target_path)) {
1527 kfree(utf16_path);
1528 return -ENOMEM;
1529 }
1530 convert_delimiter(*target_path, '/');
1531 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1532 kfree(utf16_path);
1533 return rc;
1534 }
1535
1536 #ifdef CONFIG_CIFS_ACL
1537 static struct cifs_ntsd *
1538 get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1539 const struct cifs_fid *cifsfid, u32 *pacllen)
1540 {
1541 struct cifs_ntsd *pntsd = NULL;
1542 unsigned int xid;
1543 int rc = -EOPNOTSUPP;
1544 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1545
1546 if (IS_ERR(tlink))
1547 return ERR_CAST(tlink);
1548
1549 xid = get_xid();
1550 cifs_dbg(FYI, "trying to get acl\n");
1551
1552 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1553 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1554 free_xid(xid);
1555
1556 cifs_put_tlink(tlink);
1557
1558 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1559 if (rc)
1560 return ERR_PTR(rc);
1561 return pntsd;
1562
1563 }
1564
1565 static struct cifs_ntsd *
1566 get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1567 const char *path, u32 *pacllen)
1568 {
1569 struct cifs_ntsd *pntsd = NULL;
1570 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1571 unsigned int xid;
1572 int rc;
1573 struct cifs_tcon *tcon;
1574 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1575 struct cifs_fid fid;
1576 struct cifs_open_parms oparms;
1577 __le16 *utf16_path;
1578
1579 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1580 if (IS_ERR(tlink))
1581 return ERR_CAST(tlink);
1582
1583 tcon = tlink_tcon(tlink);
1584 xid = get_xid();
1585
1586 if (backup_cred(cifs_sb))
1587 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1588 else
1589 oparms.create_options = 0;
1590
1591 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1592 if (!utf16_path)
1593 return ERR_PTR(-ENOMEM);
1594
1595 oparms.tcon = tcon;
1596 oparms.desired_access = READ_CONTROL;
1597 oparms.disposition = FILE_OPEN;
1598 oparms.fid = &fid;
1599 oparms.reconnect = false;
1600
1601 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1602 kfree(utf16_path);
1603 if (!rc) {
1604 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1605 fid.volatile_fid, (void **)&pntsd, pacllen);
1606 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1607 }
1608
1609 cifs_put_tlink(tlink);
1610 free_xid(xid);
1611
1612 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1613 if (rc)
1614 return ERR_PTR(rc);
1615 return pntsd;
1616 }
1617
1618 #ifdef CONFIG_CIFS_ACL
1619 static int
1620 set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1621 struct inode *inode, const char *path, int aclflag)
1622 {
1623 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1624 unsigned int xid;
1625 int rc, access_flags = 0;
1626 struct cifs_tcon *tcon;
1627 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1628 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1629 struct cifs_fid fid;
1630 struct cifs_open_parms oparms;
1631 __le16 *utf16_path;
1632
1633 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1634 if (IS_ERR(tlink))
1635 return PTR_ERR(tlink);
1636
1637 tcon = tlink_tcon(tlink);
1638 xid = get_xid();
1639
1640 if (backup_cred(cifs_sb))
1641 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1642 else
1643 oparms.create_options = 0;
1644
1645 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1646 access_flags = WRITE_OWNER;
1647 else
1648 access_flags = WRITE_DAC;
1649
1650 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1651 if (!utf16_path)
1652 return -ENOMEM;
1653
1654 oparms.tcon = tcon;
1655 oparms.desired_access = access_flags;
1656 oparms.disposition = FILE_OPEN;
1657 oparms.path = path;
1658 oparms.fid = &fid;
1659 oparms.reconnect = false;
1660
1661 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1662 kfree(utf16_path);
1663 if (!rc) {
1664 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1665 fid.volatile_fid, pnntsd, acllen, aclflag);
1666 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1667 }
1668
1669 cifs_put_tlink(tlink);
1670 free_xid(xid);
1671 return rc;
1672 }
1673 #endif /* CIFS_ACL */
1674
1675 /* Retrieve an ACL from the server */
1676 static struct cifs_ntsd *
1677 get_smb2_acl(struct cifs_sb_info *cifs_sb,
1678 struct inode *inode, const char *path,
1679 u32 *pacllen)
1680 {
1681 struct cifs_ntsd *pntsd = NULL;
1682 struct cifsFileInfo *open_file = NULL;
1683
1684 if (inode)
1685 open_file = find_readable_file(CIFS_I(inode), true);
1686 if (!open_file)
1687 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1688
1689 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1690 cifsFileInfo_put(open_file);
1691 return pntsd;
1692 }
1693 #endif
1694
1695 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1696 loff_t offset, loff_t len, bool keep_size)
1697 {
1698 struct inode *inode;
1699 struct cifsInodeInfo *cifsi;
1700 struct cifsFileInfo *cfile = file->private_data;
1701 struct file_zero_data_information fsctl_buf;
1702 long rc;
1703 unsigned int xid;
1704
1705 xid = get_xid();
1706
1707 inode = d_inode(cfile->dentry);
1708 cifsi = CIFS_I(inode);
1709
1710 /* if file not oplocked can't be sure whether asking to extend size */
1711 if (!CIFS_CACHE_READ(cifsi))
1712 if (keep_size == false)
1713 return -EOPNOTSUPP;
1714
1715 /*
1716 * Must check if file sparse since fallocate -z (zero range) assumes
1717 * non-sparse allocation
1718 */
1719 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1720 return -EOPNOTSUPP;
1721
1722 /*
1723 * need to make sure we are not asked to extend the file since the SMB3
1724 * fsctl does not change the file size. In the future we could change
1725 * this to zero the first part of the range then set the file size
1726 * which for a non sparse file would zero the newly extended range
1727 */
1728 if (keep_size == false)
1729 if (i_size_read(inode) < offset + len)
1730 return -EOPNOTSUPP;
1731
1732 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1733
1734 fsctl_buf.FileOffset = cpu_to_le64(offset);
1735 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1736
1737 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1738 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1739 true /* is_fctl */, (char *)&fsctl_buf,
1740 sizeof(struct file_zero_data_information), NULL, NULL);
1741 free_xid(xid);
1742 return rc;
1743 }
1744
1745 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1746 loff_t offset, loff_t len)
1747 {
1748 struct inode *inode;
1749 struct cifsInodeInfo *cifsi;
1750 struct cifsFileInfo *cfile = file->private_data;
1751 struct file_zero_data_information fsctl_buf;
1752 long rc;
1753 unsigned int xid;
1754 __u8 set_sparse = 1;
1755
1756 xid = get_xid();
1757
1758 inode = d_inode(cfile->dentry);
1759 cifsi = CIFS_I(inode);
1760
1761 /* Need to make file sparse, if not already, before freeing range. */
1762 /* Consider adding equivalent for compressed since it could also work */
1763 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1764 return -EOPNOTSUPP;
1765
1766 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1767
1768 fsctl_buf.FileOffset = cpu_to_le64(offset);
1769 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1770
1771 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1772 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1773 true /* is_fctl */, (char *)&fsctl_buf,
1774 sizeof(struct file_zero_data_information), NULL, NULL);
1775 free_xid(xid);
1776 return rc;
1777 }
1778
1779 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1780 loff_t off, loff_t len, bool keep_size)
1781 {
1782 struct inode *inode;
1783 struct cifsInodeInfo *cifsi;
1784 struct cifsFileInfo *cfile = file->private_data;
1785 long rc = -EOPNOTSUPP;
1786 unsigned int xid;
1787
1788 xid = get_xid();
1789
1790 inode = d_inode(cfile->dentry);
1791 cifsi = CIFS_I(inode);
1792
1793 /* if file not oplocked can't be sure whether asking to extend size */
1794 if (!CIFS_CACHE_READ(cifsi))
1795 if (keep_size == false)
1796 return -EOPNOTSUPP;
1797
1798 /*
1799 * Files are non-sparse by default so falloc may be a no-op
1800 * Must check if file sparse. If not sparse, and not extending
1801 * then no need to do anything since file already allocated
1802 */
1803 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1804 if (keep_size == true)
1805 return 0;
1806 /* check if extending file */
1807 else if (i_size_read(inode) >= off + len)
1808 /* not extending file and already not sparse */
1809 return 0;
1810 /* BB: in future add else clause to extend file */
1811 else
1812 return -EOPNOTSUPP;
1813 }
1814
1815 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1816 /*
1817 * Check if falloc starts within first few pages of file
1818 * and ends within a few pages of the end of file to
1819 * ensure that most of file is being forced to be
1820 * fallocated now. If so then setting whole file sparse
1821 * ie potentially making a few extra pages at the beginning
1822 * or end of the file non-sparse via set_sparse is harmless.
1823 */
1824 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1825 return -EOPNOTSUPP;
1826
1827 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1828 }
1829 /* BB: else ... in future add code to extend file and set sparse */
1830
1831
1832 free_xid(xid);
1833 return rc;
1834 }
1835
1836
1837 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1838 loff_t off, loff_t len)
1839 {
1840 /* KEEP_SIZE already checked for by do_fallocate */
1841 if (mode & FALLOC_FL_PUNCH_HOLE)
1842 return smb3_punch_hole(file, tcon, off, len);
1843 else if (mode & FALLOC_FL_ZERO_RANGE) {
1844 if (mode & FALLOC_FL_KEEP_SIZE)
1845 return smb3_zero_range(file, tcon, off, len, true);
1846 return smb3_zero_range(file, tcon, off, len, false);
1847 } else if (mode == FALLOC_FL_KEEP_SIZE)
1848 return smb3_simple_falloc(file, tcon, off, len, true);
1849 else if (mode == 0)
1850 return smb3_simple_falloc(file, tcon, off, len, false);
1851
1852 return -EOPNOTSUPP;
1853 }
1854
1855 static void
1856 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1857 struct cifsInodeInfo *cinode, bool set_level2)
1858 {
1859 if (set_level2)
1860 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1861 0, NULL);
1862 else
1863 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1864 }
1865
1866 static void
1867 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1868 unsigned int epoch, bool *purge_cache)
1869 {
1870 oplock &= 0xFF;
1871 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1872 return;
1873 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1874 cinode->oplock = CIFS_CACHE_RHW_FLG;
1875 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1876 &cinode->vfs_inode);
1877 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1878 cinode->oplock = CIFS_CACHE_RW_FLG;
1879 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1880 &cinode->vfs_inode);
1881 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1882 cinode->oplock = CIFS_CACHE_READ_FLG;
1883 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1884 &cinode->vfs_inode);
1885 } else
1886 cinode->oplock = 0;
1887 }
1888
1889 static void
1890 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1891 unsigned int epoch, bool *purge_cache)
1892 {
1893 char message[5] = {0};
1894
1895 oplock &= 0xFF;
1896 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1897 return;
1898
1899 cinode->oplock = 0;
1900 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1901 cinode->oplock |= CIFS_CACHE_READ_FLG;
1902 strcat(message, "R");
1903 }
1904 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1905 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1906 strcat(message, "H");
1907 }
1908 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1909 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1910 strcat(message, "W");
1911 }
1912 if (!cinode->oplock)
1913 strcat(message, "None");
1914 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1915 &cinode->vfs_inode);
1916 }
1917
1918 static void
1919 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1920 unsigned int epoch, bool *purge_cache)
1921 {
1922 unsigned int old_oplock = cinode->oplock;
1923
1924 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1925
1926 if (purge_cache) {
1927 *purge_cache = false;
1928 if (old_oplock == CIFS_CACHE_READ_FLG) {
1929 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1930 (epoch - cinode->epoch > 0))
1931 *purge_cache = true;
1932 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1933 (epoch - cinode->epoch > 1))
1934 *purge_cache = true;
1935 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1936 (epoch - cinode->epoch > 1))
1937 *purge_cache = true;
1938 else if (cinode->oplock == 0 &&
1939 (epoch - cinode->epoch > 0))
1940 *purge_cache = true;
1941 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1942 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1943 (epoch - cinode->epoch > 0))
1944 *purge_cache = true;
1945 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1946 (epoch - cinode->epoch > 1))
1947 *purge_cache = true;
1948 }
1949 cinode->epoch = epoch;
1950 }
1951 }
1952
1953 static bool
1954 smb2_is_read_op(__u32 oplock)
1955 {
1956 return oplock == SMB2_OPLOCK_LEVEL_II;
1957 }
1958
1959 static bool
1960 smb21_is_read_op(__u32 oplock)
1961 {
1962 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1963 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1964 }
1965
1966 static __le32
1967 map_oplock_to_lease(u8 oplock)
1968 {
1969 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1970 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1971 else if (oplock == SMB2_OPLOCK_LEVEL_II)
1972 return SMB2_LEASE_READ_CACHING;
1973 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1974 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1975 SMB2_LEASE_WRITE_CACHING;
1976 return 0;
1977 }
1978
1979 static char *
1980 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1981 {
1982 struct create_lease *buf;
1983
1984 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1985 if (!buf)
1986 return NULL;
1987
1988 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1989 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1990 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1991
1992 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1993 (struct create_lease, lcontext));
1994 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1995 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1996 (struct create_lease, Name));
1997 buf->ccontext.NameLength = cpu_to_le16(4);
1998 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1999 buf->Name[0] = 'R';
2000 buf->Name[1] = 'q';
2001 buf->Name[2] = 'L';
2002 buf->Name[3] = 's';
2003 return (char *)buf;
2004 }
2005
2006 static char *
2007 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2008 {
2009 struct create_lease_v2 *buf;
2010
2011 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2012 if (!buf)
2013 return NULL;
2014
2015 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2016 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2017 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2018
2019 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2020 (struct create_lease_v2, lcontext));
2021 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2022 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2023 (struct create_lease_v2, Name));
2024 buf->ccontext.NameLength = cpu_to_le16(4);
2025 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2026 buf->Name[0] = 'R';
2027 buf->Name[1] = 'q';
2028 buf->Name[2] = 'L';
2029 buf->Name[3] = 's';
2030 return (char *)buf;
2031 }
2032
2033 static __u8
2034 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
2035 {
2036 struct create_lease *lc = (struct create_lease *)buf;
2037
2038 *epoch = 0; /* not used */
2039 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2040 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2041 return le32_to_cpu(lc->lcontext.LeaseState);
2042 }
2043
2044 static __u8
2045 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
2046 {
2047 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2048
2049 *epoch = le16_to_cpu(lc->lcontext.Epoch);
2050 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2051 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2052 return le32_to_cpu(lc->lcontext.LeaseState);
2053 }
2054
2055 static unsigned int
2056 smb2_wp_retry_size(struct inode *inode)
2057 {
2058 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2059 SMB2_MAX_BUFFER_SIZE);
2060 }
2061
2062 static bool
2063 smb2_dir_needs_close(struct cifsFileInfo *cfile)
2064 {
2065 return !cfile->invalidHandle;
2066 }
2067
2068 static void
2069 fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
2070 {
2071 struct smb2_sync_hdr *shdr =
2072 (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
2073 unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
2074
2075 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2076 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2077 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2078 tr_hdr->Flags = cpu_to_le16(0x01);
2079 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2080 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2081 inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - 4);
2082 inc_rfc1001_len(tr_hdr, orig_len);
2083 }
2084
2085 /* We can not use the normal sg_set_buf() as we will sometimes pass a
2086 * stack object as buf.
2087 */
2088 static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2089 unsigned int buflen)
2090 {
2091 sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2092 }
2093
2094 static struct scatterlist *
2095 init_sg(struct smb_rqst *rqst, u8 *sign)
2096 {
2097 unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2098 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2099 struct scatterlist *sg;
2100 unsigned int i;
2101 unsigned int j;
2102
2103 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2104 if (!sg)
2105 return NULL;
2106
2107 sg_init_table(sg, sg_len);
2108 smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
2109 for (i = 1; i < rqst->rq_nvec; i++)
2110 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2111 rqst->rq_iov[i].iov_len);
2112 for (j = 0; i < sg_len - 1; i++, j++) {
2113 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
2114 : rqst->rq_tailsz;
2115 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
2116 }
2117 smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2118 return sg;
2119 }
2120
2121 static int
2122 smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2123 {
2124 struct cifs_ses *ses;
2125 u8 *ses_enc_key;
2126
2127 spin_lock(&cifs_tcp_ses_lock);
2128 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2129 if (ses->Suid != ses_id)
2130 continue;
2131 ses_enc_key = enc ? ses->smb3encryptionkey :
2132 ses->smb3decryptionkey;
2133 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2134 spin_unlock(&cifs_tcp_ses_lock);
2135 return 0;
2136 }
2137 spin_unlock(&cifs_tcp_ses_lock);
2138
2139 return 1;
2140 }
2141 /*
2142 * Encrypt or decrypt @rqst message. @rqst has the following format:
2143 * iov[0] - transform header (associate data),
2144 * iov[1-N] and pages - data to encrypt.
2145 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2146 * untouched.
2147 */
2148 static int
2149 crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2150 {
2151 struct smb2_transform_hdr *tr_hdr =
2152 (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2153 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2154 int rc = 0;
2155 struct scatterlist *sg;
2156 u8 sign[SMB2_SIGNATURE_SIZE] = {};
2157 u8 key[SMB3_SIGN_KEY_SIZE];
2158 struct aead_request *req;
2159 char *iv;
2160 unsigned int iv_len;
2161 DECLARE_CRYPTO_WAIT(wait);
2162 struct crypto_aead *tfm;
2163 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2164
2165 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2166 if (rc) {
2167 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2168 enc ? "en" : "de");
2169 return 0;
2170 }
2171
2172 rc = smb3_crypto_aead_allocate(server);
2173 if (rc) {
2174 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2175 return rc;
2176 }
2177
2178 tfm = enc ? server->secmech.ccmaesencrypt :
2179 server->secmech.ccmaesdecrypt;
2180 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2181 if (rc) {
2182 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2183 return rc;
2184 }
2185
2186 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2187 if (rc) {
2188 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2189 return rc;
2190 }
2191
2192 req = aead_request_alloc(tfm, GFP_KERNEL);
2193 if (!req) {
2194 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2195 return -ENOMEM;
2196 }
2197
2198 if (!enc) {
2199 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2200 crypt_len += SMB2_SIGNATURE_SIZE;
2201 }
2202
2203 sg = init_sg(rqst, sign);
2204 if (!sg) {
2205 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2206 rc = -ENOMEM;
2207 goto free_req;
2208 }
2209
2210 iv_len = crypto_aead_ivsize(tfm);
2211 iv = kzalloc(iv_len, GFP_KERNEL);
2212 if (!iv) {
2213 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2214 rc = -ENOMEM;
2215 goto free_sg;
2216 }
2217 iv[0] = 3;
2218 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2219
2220 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2221 aead_request_set_ad(req, assoc_data_len);
2222
2223 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2224 crypto_req_done, &wait);
2225
2226 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2227 : crypto_aead_decrypt(req), &wait);
2228
2229 if (!rc && enc)
2230 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2231
2232 kfree(iv);
2233 free_sg:
2234 kfree(sg);
2235 free_req:
2236 kfree(req);
2237 return rc;
2238 }
2239
2240 static int
2241 smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2242 struct smb_rqst *old_rq)
2243 {
2244 struct kvec *iov;
2245 struct page **pages;
2246 struct smb2_transform_hdr *tr_hdr;
2247 unsigned int npages = old_rq->rq_npages;
2248 int i;
2249 int rc = -ENOMEM;
2250
2251 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2252 if (!pages)
2253 return rc;
2254
2255 new_rq->rq_pages = pages;
2256 new_rq->rq_npages = old_rq->rq_npages;
2257 new_rq->rq_pagesz = old_rq->rq_pagesz;
2258 new_rq->rq_tailsz = old_rq->rq_tailsz;
2259
2260 for (i = 0; i < npages; i++) {
2261 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2262 if (!pages[i])
2263 goto err_free_pages;
2264 }
2265
2266 iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
2267 if (!iov)
2268 goto err_free_pages;
2269
2270 /* copy all iovs from the old except the 1st one (rfc1002 length) */
2271 memcpy(&iov[1], &old_rq->rq_iov[1],
2272 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
2273 new_rq->rq_iov = iov;
2274 new_rq->rq_nvec = old_rq->rq_nvec;
2275
2276 tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2277 if (!tr_hdr)
2278 goto err_free_iov;
2279
2280 /* fill the 1st iov with a transform header */
2281 fill_transform_hdr(tr_hdr, old_rq);
2282 new_rq->rq_iov[0].iov_base = tr_hdr;
2283 new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2284
2285 /* copy pages form the old */
2286 for (i = 0; i < npages; i++) {
2287 char *dst = kmap(new_rq->rq_pages[i]);
2288 char *src = kmap(old_rq->rq_pages[i]);
2289 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
2290 new_rq->rq_tailsz;
2291 memcpy(dst, src, len);
2292 kunmap(new_rq->rq_pages[i]);
2293 kunmap(old_rq->rq_pages[i]);
2294 }
2295
2296 rc = crypt_message(server, new_rq, 1);
2297 cifs_dbg(FYI, "encrypt message returned %d", rc);
2298 if (rc)
2299 goto err_free_tr_hdr;
2300
2301 return rc;
2302
2303 err_free_tr_hdr:
2304 kfree(tr_hdr);
2305 err_free_iov:
2306 kfree(iov);
2307 err_free_pages:
2308 for (i = i - 1; i >= 0; i--)
2309 put_page(pages[i]);
2310 kfree(pages);
2311 return rc;
2312 }
2313
2314 static void
2315 smb3_free_transform_rq(struct smb_rqst *rqst)
2316 {
2317 int i = rqst->rq_npages - 1;
2318
2319 for (; i >= 0; i--)
2320 put_page(rqst->rq_pages[i]);
2321 kfree(rqst->rq_pages);
2322 /* free transform header */
2323 kfree(rqst->rq_iov[0].iov_base);
2324 kfree(rqst->rq_iov);
2325 }
2326
2327 static int
2328 smb3_is_transform_hdr(void *buf)
2329 {
2330 struct smb2_transform_hdr *trhdr = buf;
2331
2332 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2333 }
2334
2335 static int
2336 decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2337 unsigned int buf_data_size, struct page **pages,
2338 unsigned int npages, unsigned int page_data_size)
2339 {
2340 struct kvec iov[2];
2341 struct smb_rqst rqst = {NULL};
2342 struct smb2_hdr *hdr;
2343 int rc;
2344
2345 iov[0].iov_base = buf;
2346 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2347 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2348 iov[1].iov_len = buf_data_size;
2349
2350 rqst.rq_iov = iov;
2351 rqst.rq_nvec = 2;
2352 rqst.rq_pages = pages;
2353 rqst.rq_npages = npages;
2354 rqst.rq_pagesz = PAGE_SIZE;
2355 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2356
2357 rc = crypt_message(server, &rqst, 0);
2358 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2359
2360 if (rc)
2361 return rc;
2362
2363 memmove(buf + 4, iov[1].iov_base, buf_data_size);
2364 hdr = (struct smb2_hdr *)buf;
2365 hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
2366 server->total_read = buf_data_size + page_data_size + 4;
2367
2368 return rc;
2369 }
2370
2371 static int
2372 read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2373 unsigned int npages, unsigned int len)
2374 {
2375 int i;
2376 int length;
2377
2378 for (i = 0; i < npages; i++) {
2379 struct page *page = pages[i];
2380 size_t n;
2381
2382 n = len;
2383 if (len >= PAGE_SIZE) {
2384 /* enough data to fill the page */
2385 n = PAGE_SIZE;
2386 len -= n;
2387 } else {
2388 zero_user(page, len, PAGE_SIZE - len);
2389 len = 0;
2390 }
2391 length = cifs_read_page_from_socket(server, page, n);
2392 if (length < 0)
2393 return length;
2394 server->total_read += length;
2395 }
2396
2397 return 0;
2398 }
2399
2400 static int
2401 init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2402 unsigned int cur_off, struct bio_vec **page_vec)
2403 {
2404 struct bio_vec *bvec;
2405 int i;
2406
2407 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2408 if (!bvec)
2409 return -ENOMEM;
2410
2411 for (i = 0; i < npages; i++) {
2412 bvec[i].bv_page = pages[i];
2413 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2414 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2415 data_size -= bvec[i].bv_len;
2416 }
2417
2418 if (data_size != 0) {
2419 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2420 kfree(bvec);
2421 return -EIO;
2422 }
2423
2424 *page_vec = bvec;
2425 return 0;
2426 }
2427
2428 static int
2429 handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2430 char *buf, unsigned int buf_len, struct page **pages,
2431 unsigned int npages, unsigned int page_data_size)
2432 {
2433 unsigned int data_offset;
2434 unsigned int data_len;
2435 unsigned int cur_off;
2436 unsigned int cur_page_idx;
2437 unsigned int pad_len;
2438 struct cifs_readdata *rdata = mid->callback_data;
2439 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2440 struct bio_vec *bvec = NULL;
2441 struct iov_iter iter;
2442 struct kvec iov;
2443 int length;
2444 bool use_rdma_mr = false;
2445
2446 if (shdr->Command != SMB2_READ) {
2447 cifs_dbg(VFS, "only big read responses are supported\n");
2448 return -ENOTSUPP;
2449 }
2450
2451 if (server->ops->is_session_expired &&
2452 server->ops->is_session_expired(buf)) {
2453 cifs_reconnect(server);
2454 wake_up(&server->response_q);
2455 return -1;
2456 }
2457
2458 if (server->ops->is_status_pending &&
2459 server->ops->is_status_pending(buf, server, 0))
2460 return -1;
2461
2462 rdata->result = server->ops->map_error(buf, false);
2463 if (rdata->result != 0) {
2464 cifs_dbg(FYI, "%s: server returned error %d\n",
2465 __func__, rdata->result);
2466 dequeue_mid(mid, rdata->result);
2467 return 0;
2468 }
2469
2470 data_offset = server->ops->read_data_offset(buf) + 4;
2471 #ifdef CONFIG_CIFS_SMB_DIRECT
2472 use_rdma_mr = rdata->mr;
2473 #endif
2474 data_len = server->ops->read_data_length(buf, use_rdma_mr);
2475
2476 if (data_offset < server->vals->read_rsp_size) {
2477 /*
2478 * win2k8 sometimes sends an offset of 0 when the read
2479 * is beyond the EOF. Treat it as if the data starts just after
2480 * the header.
2481 */
2482 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2483 __func__, data_offset);
2484 data_offset = server->vals->read_rsp_size;
2485 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2486 /* data_offset is beyond the end of smallbuf */
2487 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2488 __func__, data_offset);
2489 rdata->result = -EIO;
2490 dequeue_mid(mid, rdata->result);
2491 return 0;
2492 }
2493
2494 pad_len = data_offset - server->vals->read_rsp_size;
2495
2496 if (buf_len <= data_offset) {
2497 /* read response payload is in pages */
2498 cur_page_idx = pad_len / PAGE_SIZE;
2499 cur_off = pad_len % PAGE_SIZE;
2500
2501 if (cur_page_idx != 0) {
2502 /* data offset is beyond the 1st page of response */
2503 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2504 __func__, data_offset);
2505 rdata->result = -EIO;
2506 dequeue_mid(mid, rdata->result);
2507 return 0;
2508 }
2509
2510 if (data_len > page_data_size - pad_len) {
2511 /* data_len is corrupt -- discard frame */
2512 rdata->result = -EIO;
2513 dequeue_mid(mid, rdata->result);
2514 return 0;
2515 }
2516
2517 rdata->result = init_read_bvec(pages, npages, page_data_size,
2518 cur_off, &bvec);
2519 if (rdata->result != 0) {
2520 dequeue_mid(mid, rdata->result);
2521 return 0;
2522 }
2523
2524 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2525 } else if (buf_len >= data_offset + data_len) {
2526 /* read response payload is in buf */
2527 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2528 iov.iov_base = buf + data_offset;
2529 iov.iov_len = data_len;
2530 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2531 } else {
2532 /* read response payload cannot be in both buf and pages */
2533 WARN_ONCE(1, "buf can not contain only a part of read data");
2534 rdata->result = -EIO;
2535 dequeue_mid(mid, rdata->result);
2536 return 0;
2537 }
2538
2539 /* set up first iov for signature check */
2540 rdata->iov[0].iov_base = buf;
2541 rdata->iov[0].iov_len = 4;
2542 rdata->iov[1].iov_base = buf + 4;
2543 rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2544 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2545 rdata->iov[0].iov_base, server->vals->read_rsp_size);
2546
2547 length = rdata->copy_into_pages(server, rdata, &iter);
2548
2549 kfree(bvec);
2550
2551 if (length < 0)
2552 return length;
2553
2554 dequeue_mid(mid, false);
2555 return length;
2556 }
2557
2558 static int
2559 receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2560 {
2561 char *buf = server->smallbuf;
2562 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2563 unsigned int npages;
2564 struct page **pages;
2565 unsigned int len;
2566 unsigned int buflen = get_rfc1002_length(buf) + 4;
2567 int rc;
2568 int i = 0;
2569
2570 len = min_t(unsigned int, buflen, server->vals->read_rsp_size - 4 +
2571 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2572
2573 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2574 if (rc < 0)
2575 return rc;
2576 server->total_read += rc;
2577
2578 len = le32_to_cpu(tr_hdr->OriginalMessageSize) + 4 -
2579 server->vals->read_rsp_size;
2580 npages = DIV_ROUND_UP(len, PAGE_SIZE);
2581
2582 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2583 if (!pages) {
2584 rc = -ENOMEM;
2585 goto discard_data;
2586 }
2587
2588 for (; i < npages; i++) {
2589 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2590 if (!pages[i]) {
2591 rc = -ENOMEM;
2592 goto discard_data;
2593 }
2594 }
2595
2596 /* read read data into pages */
2597 rc = read_data_into_pages(server, pages, npages, len);
2598 if (rc)
2599 goto free_pages;
2600
2601 rc = cifs_discard_remaining_data(server);
2602 if (rc)
2603 goto free_pages;
2604
2605 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size - 4,
2606 pages, npages, len);
2607 if (rc)
2608 goto free_pages;
2609
2610 *mid = smb2_find_mid(server, buf);
2611 if (*mid == NULL)
2612 cifs_dbg(FYI, "mid not found\n");
2613 else {
2614 cifs_dbg(FYI, "mid found\n");
2615 (*mid)->decrypted = true;
2616 rc = handle_read_data(server, *mid, buf,
2617 server->vals->read_rsp_size,
2618 pages, npages, len);
2619 }
2620
2621 free_pages:
2622 for (i = i - 1; i >= 0; i--)
2623 put_page(pages[i]);
2624 kfree(pages);
2625 return rc;
2626 discard_data:
2627 cifs_discard_remaining_data(server);
2628 goto free_pages;
2629 }
2630
2631 static int
2632 receive_encrypted_standard(struct TCP_Server_Info *server,
2633 struct mid_q_entry **mid)
2634 {
2635 int length;
2636 char *buf = server->smallbuf;
2637 unsigned int pdu_length = get_rfc1002_length(buf);
2638 unsigned int buf_size;
2639 struct mid_q_entry *mid_entry;
2640
2641 /* switch to large buffer if too big for a small one */
2642 if (pdu_length + 4 > MAX_CIFS_SMALL_BUFFER_SIZE) {
2643 server->large_buf = true;
2644 memcpy(server->bigbuf, buf, server->total_read);
2645 buf = server->bigbuf;
2646 }
2647
2648 /* now read the rest */
2649 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2650 pdu_length - HEADER_SIZE(server) + 1 + 4);
2651 if (length < 0)
2652 return length;
2653 server->total_read += length;
2654
2655 buf_size = pdu_length + 4 - sizeof(struct smb2_transform_hdr);
2656 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2657 if (length)
2658 return length;
2659
2660 mid_entry = smb2_find_mid(server, buf);
2661 if (mid_entry == NULL)
2662 cifs_dbg(FYI, "mid not found\n");
2663 else {
2664 cifs_dbg(FYI, "mid found\n");
2665 mid_entry->decrypted = true;
2666 }
2667
2668 *mid = mid_entry;
2669
2670 if (mid_entry && mid_entry->handle)
2671 return mid_entry->handle(server, mid_entry);
2672
2673 return cifs_handle_standard(server, mid_entry);
2674 }
2675
2676 static int
2677 smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2678 {
2679 char *buf = server->smallbuf;
2680 unsigned int pdu_length = get_rfc1002_length(buf);
2681 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2682 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2683
2684 if (pdu_length + 4 < sizeof(struct smb2_transform_hdr) +
2685 sizeof(struct smb2_sync_hdr)) {
2686 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2687 pdu_length);
2688 cifs_reconnect(server);
2689 wake_up(&server->response_q);
2690 return -ECONNABORTED;
2691 }
2692
2693 if (pdu_length + 4 < orig_len + sizeof(struct smb2_transform_hdr)) {
2694 cifs_dbg(VFS, "Transform message is broken\n");
2695 cifs_reconnect(server);
2696 wake_up(&server->response_q);
2697 return -ECONNABORTED;
2698 }
2699
2700 if (pdu_length + 4 > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2701 return receive_encrypted_read(server, mid);
2702
2703 return receive_encrypted_standard(server, mid);
2704 }
2705
2706 int
2707 smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2708 {
2709 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2710
2711 return handle_read_data(server, mid, buf, get_rfc1002_length(buf) + 4,
2712 NULL, 0, 0);
2713 }
2714
2715 struct smb_version_operations smb20_operations = {
2716 .compare_fids = smb2_compare_fids,
2717 .setup_request = smb2_setup_request,
2718 .setup_async_request = smb2_setup_async_request,
2719 .check_receive = smb2_check_receive,
2720 .add_credits = smb2_add_credits,
2721 .set_credits = smb2_set_credits,
2722 .get_credits_field = smb2_get_credits_field,
2723 .get_credits = smb2_get_credits,
2724 .wait_mtu_credits = cifs_wait_mtu_credits,
2725 .get_next_mid = smb2_get_next_mid,
2726 .read_data_offset = smb2_read_data_offset,
2727 .read_data_length = smb2_read_data_length,
2728 .map_error = map_smb2_to_linux_error,
2729 .find_mid = smb2_find_mid,
2730 .check_message = smb2_check_message,
2731 .dump_detail = smb2_dump_detail,
2732 .clear_stats = smb2_clear_stats,
2733 .print_stats = smb2_print_stats,
2734 .is_oplock_break = smb2_is_valid_oplock_break,
2735 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2736 .downgrade_oplock = smb2_downgrade_oplock,
2737 .need_neg = smb2_need_neg,
2738 .negotiate = smb2_negotiate,
2739 .negotiate_wsize = smb2_negotiate_wsize,
2740 .negotiate_rsize = smb2_negotiate_rsize,
2741 .sess_setup = SMB2_sess_setup,
2742 .logoff = SMB2_logoff,
2743 .tree_connect = SMB2_tcon,
2744 .tree_disconnect = SMB2_tdis,
2745 .qfs_tcon = smb2_qfs_tcon,
2746 .is_path_accessible = smb2_is_path_accessible,
2747 .can_echo = smb2_can_echo,
2748 .echo = SMB2_echo,
2749 .query_path_info = smb2_query_path_info,
2750 .get_srv_inum = smb2_get_srv_inum,
2751 .query_file_info = smb2_query_file_info,
2752 .set_path_size = smb2_set_path_size,
2753 .set_file_size = smb2_set_file_size,
2754 .set_file_info = smb2_set_file_info,
2755 .set_compression = smb2_set_compression,
2756 .mkdir = smb2_mkdir,
2757 .mkdir_setinfo = smb2_mkdir_setinfo,
2758 .rmdir = smb2_rmdir,
2759 .unlink = smb2_unlink,
2760 .rename = smb2_rename_path,
2761 .create_hardlink = smb2_create_hardlink,
2762 .query_symlink = smb2_query_symlink,
2763 .query_mf_symlink = smb3_query_mf_symlink,
2764 .create_mf_symlink = smb3_create_mf_symlink,
2765 .open = smb2_open_file,
2766 .set_fid = smb2_set_fid,
2767 .close = smb2_close_file,
2768 .flush = smb2_flush_file,
2769 .async_readv = smb2_async_readv,
2770 .async_writev = smb2_async_writev,
2771 .sync_read = smb2_sync_read,
2772 .sync_write = smb2_sync_write,
2773 .query_dir_first = smb2_query_dir_first,
2774 .query_dir_next = smb2_query_dir_next,
2775 .close_dir = smb2_close_dir,
2776 .calc_smb_size = smb2_calc_size,
2777 .is_status_pending = smb2_is_status_pending,
2778 .is_session_expired = smb2_is_session_expired,
2779 .oplock_response = smb2_oplock_response,
2780 .queryfs = smb2_queryfs,
2781 .mand_lock = smb2_mand_lock,
2782 .mand_unlock_range = smb2_unlock_range,
2783 .push_mand_locks = smb2_push_mandatory_locks,
2784 .get_lease_key = smb2_get_lease_key,
2785 .set_lease_key = smb2_set_lease_key,
2786 .new_lease_key = smb2_new_lease_key,
2787 .calc_signature = smb2_calc_signature,
2788 .is_read_op = smb2_is_read_op,
2789 .set_oplock_level = smb2_set_oplock_level,
2790 .create_lease_buf = smb2_create_lease_buf,
2791 .parse_lease_buf = smb2_parse_lease_buf,
2792 .copychunk_range = smb2_copychunk_range,
2793 .wp_retry_size = smb2_wp_retry_size,
2794 .dir_needs_close = smb2_dir_needs_close,
2795 .get_dfs_refer = smb2_get_dfs_refer,
2796 .select_sectype = smb2_select_sectype,
2797 #ifdef CONFIG_CIFS_XATTR
2798 .query_all_EAs = smb2_query_eas,
2799 .set_EA = smb2_set_ea,
2800 #endif /* CIFS_XATTR */
2801 #ifdef CONFIG_CIFS_ACL
2802 .get_acl = get_smb2_acl,
2803 .get_acl_by_fid = get_smb2_acl_by_fid,
2804 .set_acl = set_smb2_acl,
2805 #endif /* CIFS_ACL */
2806 };
2807
2808 struct smb_version_operations smb21_operations = {
2809 .compare_fids = smb2_compare_fids,
2810 .setup_request = smb2_setup_request,
2811 .setup_async_request = smb2_setup_async_request,
2812 .check_receive = smb2_check_receive,
2813 .add_credits = smb2_add_credits,
2814 .set_credits = smb2_set_credits,
2815 .get_credits_field = smb2_get_credits_field,
2816 .get_credits = smb2_get_credits,
2817 .wait_mtu_credits = smb2_wait_mtu_credits,
2818 .get_next_mid = smb2_get_next_mid,
2819 .read_data_offset = smb2_read_data_offset,
2820 .read_data_length = smb2_read_data_length,
2821 .map_error = map_smb2_to_linux_error,
2822 .find_mid = smb2_find_mid,
2823 .check_message = smb2_check_message,
2824 .dump_detail = smb2_dump_detail,
2825 .clear_stats = smb2_clear_stats,
2826 .print_stats = smb2_print_stats,
2827 .is_oplock_break = smb2_is_valid_oplock_break,
2828 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2829 .downgrade_oplock = smb2_downgrade_oplock,
2830 .need_neg = smb2_need_neg,
2831 .negotiate = smb2_negotiate,
2832 .negotiate_wsize = smb2_negotiate_wsize,
2833 .negotiate_rsize = smb2_negotiate_rsize,
2834 .sess_setup = SMB2_sess_setup,
2835 .logoff = SMB2_logoff,
2836 .tree_connect = SMB2_tcon,
2837 .tree_disconnect = SMB2_tdis,
2838 .qfs_tcon = smb2_qfs_tcon,
2839 .is_path_accessible = smb2_is_path_accessible,
2840 .can_echo = smb2_can_echo,
2841 .echo = SMB2_echo,
2842 .query_path_info = smb2_query_path_info,
2843 .get_srv_inum = smb2_get_srv_inum,
2844 .query_file_info = smb2_query_file_info,
2845 .set_path_size = smb2_set_path_size,
2846 .set_file_size = smb2_set_file_size,
2847 .set_file_info = smb2_set_file_info,
2848 .set_compression = smb2_set_compression,
2849 .mkdir = smb2_mkdir,
2850 .mkdir_setinfo = smb2_mkdir_setinfo,
2851 .rmdir = smb2_rmdir,
2852 .unlink = smb2_unlink,
2853 .rename = smb2_rename_path,
2854 .create_hardlink = smb2_create_hardlink,
2855 .query_symlink = smb2_query_symlink,
2856 .query_mf_symlink = smb3_query_mf_symlink,
2857 .create_mf_symlink = smb3_create_mf_symlink,
2858 .open = smb2_open_file,
2859 .set_fid = smb2_set_fid,
2860 .close = smb2_close_file,
2861 .flush = smb2_flush_file,
2862 .async_readv = smb2_async_readv,
2863 .async_writev = smb2_async_writev,
2864 .sync_read = smb2_sync_read,
2865 .sync_write = smb2_sync_write,
2866 .query_dir_first = smb2_query_dir_first,
2867 .query_dir_next = smb2_query_dir_next,
2868 .close_dir = smb2_close_dir,
2869 .calc_smb_size = smb2_calc_size,
2870 .is_status_pending = smb2_is_status_pending,
2871 .is_session_expired = smb2_is_session_expired,
2872 .oplock_response = smb2_oplock_response,
2873 .queryfs = smb2_queryfs,
2874 .mand_lock = smb2_mand_lock,
2875 .mand_unlock_range = smb2_unlock_range,
2876 .push_mand_locks = smb2_push_mandatory_locks,
2877 .get_lease_key = smb2_get_lease_key,
2878 .set_lease_key = smb2_set_lease_key,
2879 .new_lease_key = smb2_new_lease_key,
2880 .calc_signature = smb2_calc_signature,
2881 .is_read_op = smb21_is_read_op,
2882 .set_oplock_level = smb21_set_oplock_level,
2883 .create_lease_buf = smb2_create_lease_buf,
2884 .parse_lease_buf = smb2_parse_lease_buf,
2885 .copychunk_range = smb2_copychunk_range,
2886 .wp_retry_size = smb2_wp_retry_size,
2887 .dir_needs_close = smb2_dir_needs_close,
2888 .enum_snapshots = smb3_enum_snapshots,
2889 .get_dfs_refer = smb2_get_dfs_refer,
2890 .select_sectype = smb2_select_sectype,
2891 #ifdef CONFIG_CIFS_XATTR
2892 .query_all_EAs = smb2_query_eas,
2893 .set_EA = smb2_set_ea,
2894 #endif /* CIFS_XATTR */
2895 #ifdef CONFIG_CIFS_ACL
2896 .get_acl = get_smb2_acl,
2897 .get_acl_by_fid = get_smb2_acl_by_fid,
2898 .set_acl = set_smb2_acl,
2899 #endif /* CIFS_ACL */
2900 };
2901
2902 struct smb_version_operations smb30_operations = {
2903 .compare_fids = smb2_compare_fids,
2904 .setup_request = smb2_setup_request,
2905 .setup_async_request = smb2_setup_async_request,
2906 .check_receive = smb2_check_receive,
2907 .add_credits = smb2_add_credits,
2908 .set_credits = smb2_set_credits,
2909 .get_credits_field = smb2_get_credits_field,
2910 .get_credits = smb2_get_credits,
2911 .wait_mtu_credits = smb2_wait_mtu_credits,
2912 .get_next_mid = smb2_get_next_mid,
2913 .read_data_offset = smb2_read_data_offset,
2914 .read_data_length = smb2_read_data_length,
2915 .map_error = map_smb2_to_linux_error,
2916 .find_mid = smb2_find_mid,
2917 .check_message = smb2_check_message,
2918 .dump_detail = smb2_dump_detail,
2919 .clear_stats = smb2_clear_stats,
2920 .print_stats = smb2_print_stats,
2921 .dump_share_caps = smb2_dump_share_caps,
2922 .is_oplock_break = smb2_is_valid_oplock_break,
2923 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2924 .downgrade_oplock = smb2_downgrade_oplock,
2925 .need_neg = smb2_need_neg,
2926 .negotiate = smb2_negotiate,
2927 .negotiate_wsize = smb2_negotiate_wsize,
2928 .negotiate_rsize = smb2_negotiate_rsize,
2929 .sess_setup = SMB2_sess_setup,
2930 .logoff = SMB2_logoff,
2931 .tree_connect = SMB2_tcon,
2932 .tree_disconnect = SMB2_tdis,
2933 .qfs_tcon = smb3_qfs_tcon,
2934 .is_path_accessible = smb2_is_path_accessible,
2935 .can_echo = smb2_can_echo,
2936 .echo = SMB2_echo,
2937 .query_path_info = smb2_query_path_info,
2938 .get_srv_inum = smb2_get_srv_inum,
2939 .query_file_info = smb2_query_file_info,
2940 .set_path_size = smb2_set_path_size,
2941 .set_file_size = smb2_set_file_size,
2942 .set_file_info = smb2_set_file_info,
2943 .set_compression = smb2_set_compression,
2944 .mkdir = smb2_mkdir,
2945 .mkdir_setinfo = smb2_mkdir_setinfo,
2946 .rmdir = smb2_rmdir,
2947 .unlink = smb2_unlink,
2948 .rename = smb2_rename_path,
2949 .create_hardlink = smb2_create_hardlink,
2950 .query_symlink = smb2_query_symlink,
2951 .query_mf_symlink = smb3_query_mf_symlink,
2952 .create_mf_symlink = smb3_create_mf_symlink,
2953 .open = smb2_open_file,
2954 .set_fid = smb2_set_fid,
2955 .close = smb2_close_file,
2956 .flush = smb2_flush_file,
2957 .async_readv = smb2_async_readv,
2958 .async_writev = smb2_async_writev,
2959 .sync_read = smb2_sync_read,
2960 .sync_write = smb2_sync_write,
2961 .query_dir_first = smb2_query_dir_first,
2962 .query_dir_next = smb2_query_dir_next,
2963 .close_dir = smb2_close_dir,
2964 .calc_smb_size = smb2_calc_size,
2965 .is_status_pending = smb2_is_status_pending,
2966 .is_session_expired = smb2_is_session_expired,
2967 .oplock_response = smb2_oplock_response,
2968 .queryfs = smb2_queryfs,
2969 .mand_lock = smb2_mand_lock,
2970 .mand_unlock_range = smb2_unlock_range,
2971 .push_mand_locks = smb2_push_mandatory_locks,
2972 .get_lease_key = smb2_get_lease_key,
2973 .set_lease_key = smb2_set_lease_key,
2974 .new_lease_key = smb2_new_lease_key,
2975 .generate_signingkey = generate_smb30signingkey,
2976 .calc_signature = smb3_calc_signature,
2977 .set_integrity = smb3_set_integrity,
2978 .is_read_op = smb21_is_read_op,
2979 .set_oplock_level = smb3_set_oplock_level,
2980 .create_lease_buf = smb3_create_lease_buf,
2981 .parse_lease_buf = smb3_parse_lease_buf,
2982 .copychunk_range = smb2_copychunk_range,
2983 .duplicate_extents = smb2_duplicate_extents,
2984 .validate_negotiate = smb3_validate_negotiate,
2985 .wp_retry_size = smb2_wp_retry_size,
2986 .dir_needs_close = smb2_dir_needs_close,
2987 .fallocate = smb3_fallocate,
2988 .enum_snapshots = smb3_enum_snapshots,
2989 .init_transform_rq = smb3_init_transform_rq,
2990 .free_transform_rq = smb3_free_transform_rq,
2991 .is_transform_hdr = smb3_is_transform_hdr,
2992 .receive_transform = smb3_receive_transform,
2993 .get_dfs_refer = smb2_get_dfs_refer,
2994 .select_sectype = smb2_select_sectype,
2995 #ifdef CONFIG_CIFS_XATTR
2996 .query_all_EAs = smb2_query_eas,
2997 .set_EA = smb2_set_ea,
2998 #endif /* CIFS_XATTR */
2999 #ifdef CONFIG_CIFS_ACL
3000 .get_acl = get_smb2_acl,
3001 .get_acl_by_fid = get_smb2_acl_by_fid,
3002 .set_acl = set_smb2_acl,
3003 #endif /* CIFS_ACL */
3004 };
3005
3006 #ifdef CONFIG_CIFS_SMB311
3007 struct smb_version_operations smb311_operations = {
3008 .compare_fids = smb2_compare_fids,
3009 .setup_request = smb2_setup_request,
3010 .setup_async_request = smb2_setup_async_request,
3011 .check_receive = smb2_check_receive,
3012 .add_credits = smb2_add_credits,
3013 .set_credits = smb2_set_credits,
3014 .get_credits_field = smb2_get_credits_field,
3015 .get_credits = smb2_get_credits,
3016 .wait_mtu_credits = smb2_wait_mtu_credits,
3017 .get_next_mid = smb2_get_next_mid,
3018 .read_data_offset = smb2_read_data_offset,
3019 .read_data_length = smb2_read_data_length,
3020 .map_error = map_smb2_to_linux_error,
3021 .find_mid = smb2_find_mid,
3022 .check_message = smb2_check_message,
3023 .dump_detail = smb2_dump_detail,
3024 .clear_stats = smb2_clear_stats,
3025 .print_stats = smb2_print_stats,
3026 .dump_share_caps = smb2_dump_share_caps,
3027 .is_oplock_break = smb2_is_valid_oplock_break,
3028 .handle_cancelled_mid = smb2_handle_cancelled_mid,
3029 .downgrade_oplock = smb2_downgrade_oplock,
3030 .need_neg = smb2_need_neg,
3031 .negotiate = smb2_negotiate,
3032 .negotiate_wsize = smb2_negotiate_wsize,
3033 .negotiate_rsize = smb2_negotiate_rsize,
3034 .sess_setup = SMB2_sess_setup,
3035 .logoff = SMB2_logoff,
3036 .tree_connect = SMB2_tcon,
3037 .tree_disconnect = SMB2_tdis,
3038 .qfs_tcon = smb3_qfs_tcon,
3039 .is_path_accessible = smb2_is_path_accessible,
3040 .can_echo = smb2_can_echo,
3041 .echo = SMB2_echo,
3042 .query_path_info = smb2_query_path_info,
3043 .get_srv_inum = smb2_get_srv_inum,
3044 .query_file_info = smb2_query_file_info,
3045 .set_path_size = smb2_set_path_size,
3046 .set_file_size = smb2_set_file_size,
3047 .set_file_info = smb2_set_file_info,
3048 .set_compression = smb2_set_compression,
3049 .mkdir = smb2_mkdir,
3050 .mkdir_setinfo = smb2_mkdir_setinfo,
3051 .rmdir = smb2_rmdir,
3052 .unlink = smb2_unlink,
3053 .rename = smb2_rename_path,
3054 .create_hardlink = smb2_create_hardlink,
3055 .query_symlink = smb2_query_symlink,
3056 .query_mf_symlink = smb3_query_mf_symlink,
3057 .create_mf_symlink = smb3_create_mf_symlink,
3058 .open = smb2_open_file,
3059 .set_fid = smb2_set_fid,
3060 .close = smb2_close_file,
3061 .flush = smb2_flush_file,
3062 .async_readv = smb2_async_readv,
3063 .async_writev = smb2_async_writev,
3064 .sync_read = smb2_sync_read,
3065 .sync_write = smb2_sync_write,
3066 .query_dir_first = smb2_query_dir_first,
3067 .query_dir_next = smb2_query_dir_next,
3068 .close_dir = smb2_close_dir,
3069 .calc_smb_size = smb2_calc_size,
3070 .is_status_pending = smb2_is_status_pending,
3071 .is_session_expired = smb2_is_session_expired,
3072 .oplock_response = smb2_oplock_response,
3073 .queryfs = smb2_queryfs,
3074 .mand_lock = smb2_mand_lock,
3075 .mand_unlock_range = smb2_unlock_range,
3076 .push_mand_locks = smb2_push_mandatory_locks,
3077 .get_lease_key = smb2_get_lease_key,
3078 .set_lease_key = smb2_set_lease_key,
3079 .new_lease_key = smb2_new_lease_key,
3080 .generate_signingkey = generate_smb311signingkey,
3081 .calc_signature = smb3_calc_signature,
3082 .set_integrity = smb3_set_integrity,
3083 .is_read_op = smb21_is_read_op,
3084 .set_oplock_level = smb3_set_oplock_level,
3085 .create_lease_buf = smb3_create_lease_buf,
3086 .parse_lease_buf = smb3_parse_lease_buf,
3087 .copychunk_range = smb2_copychunk_range,
3088 .duplicate_extents = smb2_duplicate_extents,
3089 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3090 .wp_retry_size = smb2_wp_retry_size,
3091 .dir_needs_close = smb2_dir_needs_close,
3092 .fallocate = smb3_fallocate,
3093 .enum_snapshots = smb3_enum_snapshots,
3094 .init_transform_rq = smb3_init_transform_rq,
3095 .free_transform_rq = smb3_free_transform_rq,
3096 .is_transform_hdr = smb3_is_transform_hdr,
3097 .receive_transform = smb3_receive_transform,
3098 .get_dfs_refer = smb2_get_dfs_refer,
3099 .select_sectype = smb2_select_sectype,
3100 #ifdef CONFIG_CIFS_XATTR
3101 .query_all_EAs = smb2_query_eas,
3102 .set_EA = smb2_set_ea,
3103 #endif /* CIFS_XATTR */
3104 };
3105 #endif /* CIFS_SMB311 */
3106
3107 struct smb_version_values smb20_values = {
3108 .version_string = SMB20_VERSION_STRING,
3109 .protocol_id = SMB20_PROT_ID,
3110 .req_capabilities = 0, /* MBZ */
3111 .large_lock_type = 0,
3112 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3113 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3114 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3115 .header_size = sizeof(struct smb2_hdr),
3116 .max_header_size = MAX_SMB2_HDR_SIZE,
3117 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3118 .lock_cmd = SMB2_LOCK,
3119 .cap_unix = 0,
3120 .cap_nt_find = SMB2_NT_FIND,
3121 .cap_large_files = SMB2_LARGE_FILES,
3122 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3123 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3124 .create_lease_size = sizeof(struct create_lease),
3125 };
3126
3127 struct smb_version_values smb21_values = {
3128 .version_string = SMB21_VERSION_STRING,
3129 .protocol_id = SMB21_PROT_ID,
3130 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3131 .large_lock_type = 0,
3132 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3133 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3134 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3135 .header_size = sizeof(struct smb2_hdr),
3136 .max_header_size = MAX_SMB2_HDR_SIZE,
3137 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3138 .lock_cmd = SMB2_LOCK,
3139 .cap_unix = 0,
3140 .cap_nt_find = SMB2_NT_FIND,
3141 .cap_large_files = SMB2_LARGE_FILES,
3142 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3143 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3144 .create_lease_size = sizeof(struct create_lease),
3145 };
3146
3147 struct smb_version_values smb3any_values = {
3148 .version_string = SMB3ANY_VERSION_STRING,
3149 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3150 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3151 .large_lock_type = 0,
3152 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3153 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3154 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3155 .header_size = sizeof(struct smb2_hdr),
3156 .max_header_size = MAX_SMB2_HDR_SIZE,
3157 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3158 .lock_cmd = SMB2_LOCK,
3159 .cap_unix = 0,
3160 .cap_nt_find = SMB2_NT_FIND,
3161 .cap_large_files = SMB2_LARGE_FILES,
3162 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3163 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3164 .create_lease_size = sizeof(struct create_lease_v2),
3165 };
3166
3167 struct smb_version_values smbdefault_values = {
3168 .version_string = SMBDEFAULT_VERSION_STRING,
3169 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3170 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3171 .large_lock_type = 0,
3172 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3173 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3174 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3175 .header_size = sizeof(struct smb2_hdr),
3176 .max_header_size = MAX_SMB2_HDR_SIZE,
3177 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3178 .lock_cmd = SMB2_LOCK,
3179 .cap_unix = 0,
3180 .cap_nt_find = SMB2_NT_FIND,
3181 .cap_large_files = SMB2_LARGE_FILES,
3182 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3183 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3184 .create_lease_size = sizeof(struct create_lease_v2),
3185 };
3186
3187 struct smb_version_values smb30_values = {
3188 .version_string = SMB30_VERSION_STRING,
3189 .protocol_id = SMB30_PROT_ID,
3190 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3191 .large_lock_type = 0,
3192 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3193 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3194 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3195 .header_size = sizeof(struct smb2_hdr),
3196 .max_header_size = MAX_SMB2_HDR_SIZE,
3197 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3198 .lock_cmd = SMB2_LOCK,
3199 .cap_unix = 0,
3200 .cap_nt_find = SMB2_NT_FIND,
3201 .cap_large_files = SMB2_LARGE_FILES,
3202 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3203 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3204 .create_lease_size = sizeof(struct create_lease_v2),
3205 };
3206
3207 struct smb_version_values smb302_values = {
3208 .version_string = SMB302_VERSION_STRING,
3209 .protocol_id = SMB302_PROT_ID,
3210 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3211 .large_lock_type = 0,
3212 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3213 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3214 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3215 .header_size = sizeof(struct smb2_hdr),
3216 .max_header_size = MAX_SMB2_HDR_SIZE,
3217 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3218 .lock_cmd = SMB2_LOCK,
3219 .cap_unix = 0,
3220 .cap_nt_find = SMB2_NT_FIND,
3221 .cap_large_files = SMB2_LARGE_FILES,
3222 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3223 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3224 .create_lease_size = sizeof(struct create_lease_v2),
3225 };
3226
3227 #ifdef CONFIG_CIFS_SMB311
3228 struct smb_version_values smb311_values = {
3229 .version_string = SMB311_VERSION_STRING,
3230 .protocol_id = SMB311_PROT_ID,
3231 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3232 .large_lock_type = 0,
3233 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3234 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3235 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3236 .header_size = sizeof(struct smb2_hdr),
3237 .max_header_size = MAX_SMB2_HDR_SIZE,
3238 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3239 .lock_cmd = SMB2_LOCK,
3240 .cap_unix = 0,
3241 .cap_nt_find = SMB2_NT_FIND,
3242 .cap_large_files = SMB2_LARGE_FILES,
3243 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3244 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3245 .create_lease_size = sizeof(struct create_lease_v2),
3246 };
3247 #endif /* SMB311 */
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