Loading...
Note: File does not exist in v6.13.7.
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
37static int
38change_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
70static void
71smb2_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
102static void
103smb2_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
110static int *
111smb2_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
123static unsigned int
124smb2_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
131static int
132smb2_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
178static __u64
179smb2_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
189static struct mid_q_entry *
190smb2_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
214static void
215smb2_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
227static bool
228smb2_need_neg(struct TCP_Server_Info *server)
229{
230 return server->max_read == 0;
231}
232
233static int
234smb2_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
245static unsigned int
246smb2_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
270static unsigned int
271smb2_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
297static int
298SMB3_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
325static void
326smb3_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
359static void
360smb2_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
387static int
388smb2_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
419static int
420smb2_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
428static int
429smb2_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
449static ssize_t
450move_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
528out:
529 return (ssize_t)rc;
530}
531
532static ssize_t
533smb2_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
607static int
608smb2_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
663static bool
664smb2_can_echo(struct TCP_Server_Info *server)
665{
666 return server->echoes;
667}
668
669static void
670smb2_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
681static void
682smb2_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
712static void
713smb2_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
778static void
779smb2_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
792static void
793smb2_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
799static int
800SMB2_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
824req_res_key_exit:
825 kfree(res_key);
826 return rc;
827}
828
829static ssize_t
830smb2_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
949cchunk_out:
950 kfree(pcchunk);
951 kfree(retbuf);
952 if (rc)
953 return rc;
954 else
955 return total_bytes_written;
956}
957
958static int
959smb2_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
965static unsigned int
966smb2_read_data_offset(char *buf)
967{
968 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
969 return rsp->DataOffset;
970}
971
972static unsigned int
973smb2_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
984static int
985smb2_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
994static int
995smb2_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 */
1006static 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
1052static int
1053smb2_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
1076static int
1077smb2_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
1116duplicate_extents_out:
1117 return rc;
1118}
1119
1120static int
1121smb2_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
1128static int
1129smb3_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
1150static int
1151smb3_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
1196static int
1197smb2_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
1237static int
1238smb2_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
1246static int
1247smb2_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*/
1257static bool
1258smb2_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
1275static bool
1276smb2_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
1287static int
1288smb2_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
1300static int
1301smb2_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
1327static bool
1328smb2_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
1334static int
1335smb2_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
1345static void
1346smb2_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
1351static void
1352smb2_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
1357static void
1358smb2_new_lease_key(struct cifs_fid *fid)
1359{
1360 generate_random_uuid(fid->lease_key);
1361}
1362
1363static int
1364smb2_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) && (rc != -EOPNOTSUPP))
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
1460static int
1461smb2_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 kvec err_iov = {NULL, 0};
1471 struct smb2_err_rsp *err_buf;
1472 struct smb2_symlink_err_rsp *symlink;
1473 unsigned int sub_len;
1474 unsigned int sub_offset;
1475 unsigned int print_len;
1476 unsigned int print_offset;
1477 struct cifs_ses *ses = tcon->ses;
1478 struct TCP_Server_Info *server = ses->server;
1479
1480 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1481
1482 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1483 if (!utf16_path)
1484 return -ENOMEM;
1485
1486 oparms.tcon = tcon;
1487 oparms.desired_access = FILE_READ_ATTRIBUTES;
1488 oparms.disposition = FILE_OPEN;
1489 oparms.create_options = 0;
1490 oparms.fid = &fid;
1491 oparms.reconnect = false;
1492
1493 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov);
1494
1495 if (!rc || !err_iov.iov_base) {
1496 kfree(utf16_path);
1497 return -ENOENT;
1498 }
1499
1500 err_buf = err_iov.iov_base;
1501 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1502 err_iov.iov_len + server->vals->header_preamble_size < SMB2_SYMLINK_STRUCT_SIZE) {
1503 kfree(utf16_path);
1504 return -ENOENT;
1505 }
1506
1507 /* open must fail on symlink - reset rc */
1508 rc = 0;
1509 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1510 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1511 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1512 print_len = le16_to_cpu(symlink->PrintNameLength);
1513 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1514
1515 if (err_iov.iov_len + server->vals->header_preamble_size <
1516 SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1517 kfree(utf16_path);
1518 return -ENOENT;
1519 }
1520
1521 if (err_iov.iov_len + server->vals->header_preamble_size <
1522 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1523 kfree(utf16_path);
1524 return -ENOENT;
1525 }
1526
1527 *target_path = cifs_strndup_from_utf16(
1528 (char *)symlink->PathBuffer + sub_offset,
1529 sub_len, true, cifs_sb->local_nls);
1530 if (!(*target_path)) {
1531 kfree(utf16_path);
1532 return -ENOMEM;
1533 }
1534 convert_delimiter(*target_path, '/');
1535 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1536 kfree(utf16_path);
1537 return rc;
1538}
1539
1540#ifdef CONFIG_CIFS_ACL
1541static struct cifs_ntsd *
1542get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb,
1543 const struct cifs_fid *cifsfid, u32 *pacllen)
1544{
1545 struct cifs_ntsd *pntsd = NULL;
1546 unsigned int xid;
1547 int rc = -EOPNOTSUPP;
1548 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1549
1550 if (IS_ERR(tlink))
1551 return ERR_CAST(tlink);
1552
1553 xid = get_xid();
1554 cifs_dbg(FYI, "trying to get acl\n");
1555
1556 rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid,
1557 cifsfid->volatile_fid, (void **)&pntsd, pacllen);
1558 free_xid(xid);
1559
1560 cifs_put_tlink(tlink);
1561
1562 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1563 if (rc)
1564 return ERR_PTR(rc);
1565 return pntsd;
1566
1567}
1568
1569static struct cifs_ntsd *
1570get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
1571 const char *path, u32 *pacllen)
1572{
1573 struct cifs_ntsd *pntsd = NULL;
1574 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1575 unsigned int xid;
1576 int rc;
1577 struct cifs_tcon *tcon;
1578 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1579 struct cifs_fid fid;
1580 struct cifs_open_parms oparms;
1581 __le16 *utf16_path;
1582
1583 cifs_dbg(FYI, "get smb3 acl for path %s\n", path);
1584 if (IS_ERR(tlink))
1585 return ERR_CAST(tlink);
1586
1587 tcon = tlink_tcon(tlink);
1588 xid = get_xid();
1589
1590 if (backup_cred(cifs_sb))
1591 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1592 else
1593 oparms.create_options = 0;
1594
1595 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1596 if (!utf16_path)
1597 return ERR_PTR(-ENOMEM);
1598
1599 oparms.tcon = tcon;
1600 oparms.desired_access = READ_CONTROL;
1601 oparms.disposition = FILE_OPEN;
1602 oparms.fid = &fid;
1603 oparms.reconnect = false;
1604
1605 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1606 kfree(utf16_path);
1607 if (!rc) {
1608 rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1609 fid.volatile_fid, (void **)&pntsd, pacllen);
1610 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1611 }
1612
1613 cifs_put_tlink(tlink);
1614 free_xid(xid);
1615
1616 cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen);
1617 if (rc)
1618 return ERR_PTR(rc);
1619 return pntsd;
1620}
1621
1622#ifdef CONFIG_CIFS_ACL
1623static int
1624set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
1625 struct inode *inode, const char *path, int aclflag)
1626{
1627 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1628 unsigned int xid;
1629 int rc, access_flags = 0;
1630 struct cifs_tcon *tcon;
1631 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1632 struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
1633 struct cifs_fid fid;
1634 struct cifs_open_parms oparms;
1635 __le16 *utf16_path;
1636
1637 cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
1638 if (IS_ERR(tlink))
1639 return PTR_ERR(tlink);
1640
1641 tcon = tlink_tcon(tlink);
1642 xid = get_xid();
1643
1644 if (backup_cred(cifs_sb))
1645 oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
1646 else
1647 oparms.create_options = 0;
1648
1649 if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
1650 access_flags = WRITE_OWNER;
1651 else
1652 access_flags = WRITE_DAC;
1653
1654 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
1655 if (!utf16_path)
1656 return -ENOMEM;
1657
1658 oparms.tcon = tcon;
1659 oparms.desired_access = access_flags;
1660 oparms.disposition = FILE_OPEN;
1661 oparms.path = path;
1662 oparms.fid = &fid;
1663 oparms.reconnect = false;
1664
1665 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
1666 kfree(utf16_path);
1667 if (!rc) {
1668 rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
1669 fid.volatile_fid, pnntsd, acllen, aclflag);
1670 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1671 }
1672
1673 cifs_put_tlink(tlink);
1674 free_xid(xid);
1675 return rc;
1676}
1677#endif /* CIFS_ACL */
1678
1679/* Retrieve an ACL from the server */
1680static struct cifs_ntsd *
1681get_smb2_acl(struct cifs_sb_info *cifs_sb,
1682 struct inode *inode, const char *path,
1683 u32 *pacllen)
1684{
1685 struct cifs_ntsd *pntsd = NULL;
1686 struct cifsFileInfo *open_file = NULL;
1687
1688 if (inode)
1689 open_file = find_readable_file(CIFS_I(inode), true);
1690 if (!open_file)
1691 return get_smb2_acl_by_path(cifs_sb, path, pacllen);
1692
1693 pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen);
1694 cifsFileInfo_put(open_file);
1695 return pntsd;
1696}
1697#endif
1698
1699static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1700 loff_t offset, loff_t len, bool keep_size)
1701{
1702 struct inode *inode;
1703 struct cifsInodeInfo *cifsi;
1704 struct cifsFileInfo *cfile = file->private_data;
1705 struct file_zero_data_information fsctl_buf;
1706 long rc;
1707 unsigned int xid;
1708
1709 xid = get_xid();
1710
1711 inode = d_inode(cfile->dentry);
1712 cifsi = CIFS_I(inode);
1713
1714 /* if file not oplocked can't be sure whether asking to extend size */
1715 if (!CIFS_CACHE_READ(cifsi))
1716 if (keep_size == false)
1717 return -EOPNOTSUPP;
1718
1719 /*
1720 * Must check if file sparse since fallocate -z (zero range) assumes
1721 * non-sparse allocation
1722 */
1723 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1724 return -EOPNOTSUPP;
1725
1726 /*
1727 * need to make sure we are not asked to extend the file since the SMB3
1728 * fsctl does not change the file size. In the future we could change
1729 * this to zero the first part of the range then set the file size
1730 * which for a non sparse file would zero the newly extended range
1731 */
1732 if (keep_size == false)
1733 if (i_size_read(inode) < offset + len)
1734 return -EOPNOTSUPP;
1735
1736 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1737
1738 fsctl_buf.FileOffset = cpu_to_le64(offset);
1739 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1740
1741 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1742 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1743 true /* is_fctl */, (char *)&fsctl_buf,
1744 sizeof(struct file_zero_data_information), NULL, NULL);
1745 free_xid(xid);
1746 return rc;
1747}
1748
1749static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1750 loff_t offset, loff_t len)
1751{
1752 struct inode *inode;
1753 struct cifsInodeInfo *cifsi;
1754 struct cifsFileInfo *cfile = file->private_data;
1755 struct file_zero_data_information fsctl_buf;
1756 long rc;
1757 unsigned int xid;
1758 __u8 set_sparse = 1;
1759
1760 xid = get_xid();
1761
1762 inode = d_inode(cfile->dentry);
1763 cifsi = CIFS_I(inode);
1764
1765 /* Need to make file sparse, if not already, before freeing range. */
1766 /* Consider adding equivalent for compressed since it could also work */
1767 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1768 return -EOPNOTSUPP;
1769
1770 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1771
1772 fsctl_buf.FileOffset = cpu_to_le64(offset);
1773 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1774
1775 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1776 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1777 true /* is_fctl */, (char *)&fsctl_buf,
1778 sizeof(struct file_zero_data_information), NULL, NULL);
1779 free_xid(xid);
1780 return rc;
1781}
1782
1783static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1784 loff_t off, loff_t len, bool keep_size)
1785{
1786 struct inode *inode;
1787 struct cifsInodeInfo *cifsi;
1788 struct cifsFileInfo *cfile = file->private_data;
1789 long rc = -EOPNOTSUPP;
1790 unsigned int xid;
1791
1792 xid = get_xid();
1793
1794 inode = d_inode(cfile->dentry);
1795 cifsi = CIFS_I(inode);
1796
1797 /* if file not oplocked can't be sure whether asking to extend size */
1798 if (!CIFS_CACHE_READ(cifsi))
1799 if (keep_size == false)
1800 return -EOPNOTSUPP;
1801
1802 /*
1803 * Files are non-sparse by default so falloc may be a no-op
1804 * Must check if file sparse. If not sparse, and not extending
1805 * then no need to do anything since file already allocated
1806 */
1807 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1808 if (keep_size == true)
1809 return 0;
1810 /* check if extending file */
1811 else if (i_size_read(inode) >= off + len)
1812 /* not extending file and already not sparse */
1813 return 0;
1814 /* BB: in future add else clause to extend file */
1815 else
1816 return -EOPNOTSUPP;
1817 }
1818
1819 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1820 /*
1821 * Check if falloc starts within first few pages of file
1822 * and ends within a few pages of the end of file to
1823 * ensure that most of file is being forced to be
1824 * fallocated now. If so then setting whole file sparse
1825 * ie potentially making a few extra pages at the beginning
1826 * or end of the file non-sparse via set_sparse is harmless.
1827 */
1828 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1829 return -EOPNOTSUPP;
1830
1831 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1832 }
1833 /* BB: else ... in future add code to extend file and set sparse */
1834
1835
1836 free_xid(xid);
1837 return rc;
1838}
1839
1840
1841static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1842 loff_t off, loff_t len)
1843{
1844 /* KEEP_SIZE already checked for by do_fallocate */
1845 if (mode & FALLOC_FL_PUNCH_HOLE)
1846 return smb3_punch_hole(file, tcon, off, len);
1847 else if (mode & FALLOC_FL_ZERO_RANGE) {
1848 if (mode & FALLOC_FL_KEEP_SIZE)
1849 return smb3_zero_range(file, tcon, off, len, true);
1850 return smb3_zero_range(file, tcon, off, len, false);
1851 } else if (mode == FALLOC_FL_KEEP_SIZE)
1852 return smb3_simple_falloc(file, tcon, off, len, true);
1853 else if (mode == 0)
1854 return smb3_simple_falloc(file, tcon, off, len, false);
1855
1856 return -EOPNOTSUPP;
1857}
1858
1859static void
1860smb2_downgrade_oplock(struct TCP_Server_Info *server,
1861 struct cifsInodeInfo *cinode, bool set_level2)
1862{
1863 if (set_level2)
1864 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1865 0, NULL);
1866 else
1867 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1868}
1869
1870static void
1871smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1872 unsigned int epoch, bool *purge_cache)
1873{
1874 oplock &= 0xFF;
1875 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1876 return;
1877 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1878 cinode->oplock = CIFS_CACHE_RHW_FLG;
1879 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1880 &cinode->vfs_inode);
1881 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1882 cinode->oplock = CIFS_CACHE_RW_FLG;
1883 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1884 &cinode->vfs_inode);
1885 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1886 cinode->oplock = CIFS_CACHE_READ_FLG;
1887 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1888 &cinode->vfs_inode);
1889 } else
1890 cinode->oplock = 0;
1891}
1892
1893static void
1894smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1895 unsigned int epoch, bool *purge_cache)
1896{
1897 char message[5] = {0};
1898
1899 oplock &= 0xFF;
1900 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1901 return;
1902
1903 cinode->oplock = 0;
1904 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1905 cinode->oplock |= CIFS_CACHE_READ_FLG;
1906 strcat(message, "R");
1907 }
1908 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1909 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1910 strcat(message, "H");
1911 }
1912 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1913 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1914 strcat(message, "W");
1915 }
1916 if (!cinode->oplock)
1917 strcat(message, "None");
1918 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1919 &cinode->vfs_inode);
1920}
1921
1922static void
1923smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1924 unsigned int epoch, bool *purge_cache)
1925{
1926 unsigned int old_oplock = cinode->oplock;
1927
1928 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1929
1930 if (purge_cache) {
1931 *purge_cache = false;
1932 if (old_oplock == CIFS_CACHE_READ_FLG) {
1933 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1934 (epoch - cinode->epoch > 0))
1935 *purge_cache = true;
1936 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1937 (epoch - cinode->epoch > 1))
1938 *purge_cache = true;
1939 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1940 (epoch - cinode->epoch > 1))
1941 *purge_cache = true;
1942 else if (cinode->oplock == 0 &&
1943 (epoch - cinode->epoch > 0))
1944 *purge_cache = true;
1945 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1946 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1947 (epoch - cinode->epoch > 0))
1948 *purge_cache = true;
1949 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1950 (epoch - cinode->epoch > 1))
1951 *purge_cache = true;
1952 }
1953 cinode->epoch = epoch;
1954 }
1955}
1956
1957static bool
1958smb2_is_read_op(__u32 oplock)
1959{
1960 return oplock == SMB2_OPLOCK_LEVEL_II;
1961}
1962
1963static bool
1964smb21_is_read_op(__u32 oplock)
1965{
1966 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1967 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1968}
1969
1970static __le32
1971map_oplock_to_lease(u8 oplock)
1972{
1973 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1974 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1975 else if (oplock == SMB2_OPLOCK_LEVEL_II)
1976 return SMB2_LEASE_READ_CACHING;
1977 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1978 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1979 SMB2_LEASE_WRITE_CACHING;
1980 return 0;
1981}
1982
1983static char *
1984smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1985{
1986 struct create_lease *buf;
1987
1988 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1989 if (!buf)
1990 return NULL;
1991
1992 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1993 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1994 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1995
1996 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1997 (struct create_lease, lcontext));
1998 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1999 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2000 (struct create_lease, Name));
2001 buf->ccontext.NameLength = cpu_to_le16(4);
2002 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2003 buf->Name[0] = 'R';
2004 buf->Name[1] = 'q';
2005 buf->Name[2] = 'L';
2006 buf->Name[3] = 's';
2007 return (char *)buf;
2008}
2009
2010static char *
2011smb3_create_lease_buf(u8 *lease_key, u8 oplock)
2012{
2013 struct create_lease_v2 *buf;
2014
2015 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
2016 if (!buf)
2017 return NULL;
2018
2019 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
2020 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
2021 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
2022
2023 buf->ccontext.DataOffset = cpu_to_le16(offsetof
2024 (struct create_lease_v2, lcontext));
2025 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
2026 buf->ccontext.NameOffset = cpu_to_le16(offsetof
2027 (struct create_lease_v2, Name));
2028 buf->ccontext.NameLength = cpu_to_le16(4);
2029 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
2030 buf->Name[0] = 'R';
2031 buf->Name[1] = 'q';
2032 buf->Name[2] = 'L';
2033 buf->Name[3] = 's';
2034 return (char *)buf;
2035}
2036
2037static __u8
2038smb2_parse_lease_buf(void *buf, unsigned int *epoch)
2039{
2040 struct create_lease *lc = (struct create_lease *)buf;
2041
2042 *epoch = 0; /* not used */
2043 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2044 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2045 return le32_to_cpu(lc->lcontext.LeaseState);
2046}
2047
2048static __u8
2049smb3_parse_lease_buf(void *buf, unsigned int *epoch)
2050{
2051 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
2052
2053 *epoch = le16_to_cpu(lc->lcontext.Epoch);
2054 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
2055 return SMB2_OPLOCK_LEVEL_NOCHANGE;
2056 return le32_to_cpu(lc->lcontext.LeaseState);
2057}
2058
2059static unsigned int
2060smb2_wp_retry_size(struct inode *inode)
2061{
2062 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
2063 SMB2_MAX_BUFFER_SIZE);
2064}
2065
2066static bool
2067smb2_dir_needs_close(struct cifsFileInfo *cfile)
2068{
2069 return !cfile->invalidHandle;
2070}
2071
2072static void
2073fill_transform_hdr(struct TCP_Server_Info *server,
2074 struct smb2_transform_hdr *tr_hdr, struct smb_rqst *old_rq)
2075{
2076 struct smb2_sync_hdr *shdr =
2077 (struct smb2_sync_hdr *)old_rq->rq_iov[1].iov_base;
2078 unsigned int orig_len = get_rfc1002_length(old_rq->rq_iov[0].iov_base);
2079
2080 memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr));
2081 tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
2082 tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
2083 tr_hdr->Flags = cpu_to_le16(0x01);
2084 get_random_bytes(&tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2085 memcpy(&tr_hdr->SessionId, &shdr->SessionId, 8);
2086 inc_rfc1001_len(tr_hdr, sizeof(struct smb2_transform_hdr) - server->vals->header_preamble_size);
2087 inc_rfc1001_len(tr_hdr, orig_len);
2088}
2089
2090/* We can not use the normal sg_set_buf() as we will sometimes pass a
2091 * stack object as buf.
2092 */
2093static inline void smb2_sg_set_buf(struct scatterlist *sg, const void *buf,
2094 unsigned int buflen)
2095{
2096 sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
2097}
2098
2099static struct scatterlist *
2100init_sg(struct smb_rqst *rqst, u8 *sign)
2101{
2102 unsigned int sg_len = rqst->rq_nvec + rqst->rq_npages + 1;
2103 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 24;
2104 struct scatterlist *sg;
2105 unsigned int i;
2106 unsigned int j;
2107
2108 sg = kmalloc_array(sg_len, sizeof(struct scatterlist), GFP_KERNEL);
2109 if (!sg)
2110 return NULL;
2111
2112 sg_init_table(sg, sg_len);
2113 smb2_sg_set_buf(&sg[0], rqst->rq_iov[0].iov_base + 24, assoc_data_len);
2114 for (i = 1; i < rqst->rq_nvec; i++)
2115 smb2_sg_set_buf(&sg[i], rqst->rq_iov[i].iov_base,
2116 rqst->rq_iov[i].iov_len);
2117 for (j = 0; i < sg_len - 1; i++, j++) {
2118 unsigned int len = (j < rqst->rq_npages - 1) ? rqst->rq_pagesz
2119 : rqst->rq_tailsz;
2120 sg_set_page(&sg[i], rqst->rq_pages[j], len, 0);
2121 }
2122 smb2_sg_set_buf(&sg[sg_len - 1], sign, SMB2_SIGNATURE_SIZE);
2123 return sg;
2124}
2125
2126static int
2127smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key)
2128{
2129 struct cifs_ses *ses;
2130 u8 *ses_enc_key;
2131
2132 spin_lock(&cifs_tcp_ses_lock);
2133 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
2134 if (ses->Suid != ses_id)
2135 continue;
2136 ses_enc_key = enc ? ses->smb3encryptionkey :
2137 ses->smb3decryptionkey;
2138 memcpy(key, ses_enc_key, SMB3_SIGN_KEY_SIZE);
2139 spin_unlock(&cifs_tcp_ses_lock);
2140 return 0;
2141 }
2142 spin_unlock(&cifs_tcp_ses_lock);
2143
2144 return 1;
2145}
2146/*
2147 * Encrypt or decrypt @rqst message. @rqst has the following format:
2148 * iov[0] - transform header (associate data),
2149 * iov[1-N] and pages - data to encrypt.
2150 * On success return encrypted data in iov[1-N] and pages, leave iov[0]
2151 * untouched.
2152 */
2153static int
2154crypt_message(struct TCP_Server_Info *server, struct smb_rqst *rqst, int enc)
2155{
2156 struct smb2_transform_hdr *tr_hdr =
2157 (struct smb2_transform_hdr *)rqst->rq_iov[0].iov_base;
2158 unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20 - server->vals->header_preamble_size;
2159 int rc = 0;
2160 struct scatterlist *sg;
2161 u8 sign[SMB2_SIGNATURE_SIZE] = {};
2162 u8 key[SMB3_SIGN_KEY_SIZE];
2163 struct aead_request *req;
2164 char *iv;
2165 unsigned int iv_len;
2166 DECLARE_CRYPTO_WAIT(wait);
2167 struct crypto_aead *tfm;
2168 unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2169
2170 rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
2171 if (rc) {
2172 cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
2173 enc ? "en" : "de");
2174 return 0;
2175 }
2176
2177 rc = smb3_crypto_aead_allocate(server);
2178 if (rc) {
2179 cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
2180 return rc;
2181 }
2182
2183 tfm = enc ? server->secmech.ccmaesencrypt :
2184 server->secmech.ccmaesdecrypt;
2185 rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
2186 if (rc) {
2187 cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
2188 return rc;
2189 }
2190
2191 rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
2192 if (rc) {
2193 cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
2194 return rc;
2195 }
2196
2197 req = aead_request_alloc(tfm, GFP_KERNEL);
2198 if (!req) {
2199 cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
2200 return -ENOMEM;
2201 }
2202
2203 if (!enc) {
2204 memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE);
2205 crypt_len += SMB2_SIGNATURE_SIZE;
2206 }
2207
2208 sg = init_sg(rqst, sign);
2209 if (!sg) {
2210 cifs_dbg(VFS, "%s: Failed to init sg", __func__);
2211 rc = -ENOMEM;
2212 goto free_req;
2213 }
2214
2215 iv_len = crypto_aead_ivsize(tfm);
2216 iv = kzalloc(iv_len, GFP_KERNEL);
2217 if (!iv) {
2218 cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
2219 rc = -ENOMEM;
2220 goto free_sg;
2221 }
2222 iv[0] = 3;
2223 memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES128CMM_NONCE);
2224
2225 aead_request_set_crypt(req, sg, sg, crypt_len, iv);
2226 aead_request_set_ad(req, assoc_data_len);
2227
2228 aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
2229 crypto_req_done, &wait);
2230
2231 rc = crypto_wait_req(enc ? crypto_aead_encrypt(req)
2232 : crypto_aead_decrypt(req), &wait);
2233
2234 if (!rc && enc)
2235 memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE);
2236
2237 kfree(iv);
2238free_sg:
2239 kfree(sg);
2240free_req:
2241 kfree(req);
2242 return rc;
2243}
2244
2245static int
2246smb3_init_transform_rq(struct TCP_Server_Info *server, struct smb_rqst *new_rq,
2247 struct smb_rqst *old_rq)
2248{
2249 struct kvec *iov;
2250 struct page **pages;
2251 struct smb2_transform_hdr *tr_hdr;
2252 unsigned int npages = old_rq->rq_npages;
2253 int i;
2254 int rc = -ENOMEM;
2255
2256 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2257 if (!pages)
2258 return rc;
2259
2260 new_rq->rq_pages = pages;
2261 new_rq->rq_npages = old_rq->rq_npages;
2262 new_rq->rq_pagesz = old_rq->rq_pagesz;
2263 new_rq->rq_tailsz = old_rq->rq_tailsz;
2264
2265 for (i = 0; i < npages; i++) {
2266 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2267 if (!pages[i])
2268 goto err_free_pages;
2269 }
2270
2271 iov = kmalloc_array(old_rq->rq_nvec, sizeof(struct kvec), GFP_KERNEL);
2272 if (!iov)
2273 goto err_free_pages;
2274
2275 /* copy all iovs from the old except the 1st one (rfc1002 length) */
2276 memcpy(&iov[1], &old_rq->rq_iov[1],
2277 sizeof(struct kvec) * (old_rq->rq_nvec - 1));
2278 new_rq->rq_iov = iov;
2279 new_rq->rq_nvec = old_rq->rq_nvec;
2280
2281 tr_hdr = kmalloc(sizeof(struct smb2_transform_hdr), GFP_KERNEL);
2282 if (!tr_hdr)
2283 goto err_free_iov;
2284
2285 /* fill the 1st iov with a transform header */
2286 fill_transform_hdr(server, tr_hdr, old_rq);
2287 new_rq->rq_iov[0].iov_base = tr_hdr;
2288 new_rq->rq_iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2289
2290 /* copy pages form the old */
2291 for (i = 0; i < npages; i++) {
2292 char *dst = kmap(new_rq->rq_pages[i]);
2293 char *src = kmap(old_rq->rq_pages[i]);
2294 unsigned int len = (i < npages - 1) ? new_rq->rq_pagesz :
2295 new_rq->rq_tailsz;
2296 memcpy(dst, src, len);
2297 kunmap(new_rq->rq_pages[i]);
2298 kunmap(old_rq->rq_pages[i]);
2299 }
2300
2301 rc = crypt_message(server, new_rq, 1);
2302 cifs_dbg(FYI, "encrypt message returned %d", rc);
2303 if (rc)
2304 goto err_free_tr_hdr;
2305
2306 return rc;
2307
2308err_free_tr_hdr:
2309 kfree(tr_hdr);
2310err_free_iov:
2311 kfree(iov);
2312err_free_pages:
2313 for (i = i - 1; i >= 0; i--)
2314 put_page(pages[i]);
2315 kfree(pages);
2316 return rc;
2317}
2318
2319static void
2320smb3_free_transform_rq(struct smb_rqst *rqst)
2321{
2322 int i = rqst->rq_npages - 1;
2323
2324 for (; i >= 0; i--)
2325 put_page(rqst->rq_pages[i]);
2326 kfree(rqst->rq_pages);
2327 /* free transform header */
2328 kfree(rqst->rq_iov[0].iov_base);
2329 kfree(rqst->rq_iov);
2330}
2331
2332static int
2333smb3_is_transform_hdr(void *buf)
2334{
2335 struct smb2_transform_hdr *trhdr = buf;
2336
2337 return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
2338}
2339
2340static int
2341decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
2342 unsigned int buf_data_size, struct page **pages,
2343 unsigned int npages, unsigned int page_data_size)
2344{
2345 struct kvec iov[2];
2346 struct smb_rqst rqst = {NULL};
2347 struct smb2_hdr *hdr;
2348 int rc;
2349
2350 iov[0].iov_base = buf;
2351 iov[0].iov_len = sizeof(struct smb2_transform_hdr);
2352 iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr);
2353 iov[1].iov_len = buf_data_size;
2354
2355 rqst.rq_iov = iov;
2356 rqst.rq_nvec = 2;
2357 rqst.rq_pages = pages;
2358 rqst.rq_npages = npages;
2359 rqst.rq_pagesz = PAGE_SIZE;
2360 rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
2361
2362 rc = crypt_message(server, &rqst, 0);
2363 cifs_dbg(FYI, "decrypt message returned %d\n", rc);
2364
2365 if (rc)
2366 return rc;
2367
2368 memmove(buf + server->vals->header_preamble_size, iov[1].iov_base, buf_data_size);
2369 hdr = (struct smb2_hdr *)buf;
2370 hdr->smb2_buf_length = cpu_to_be32(buf_data_size + page_data_size);
2371 server->total_read = buf_data_size + page_data_size + server->vals->header_preamble_size;
2372
2373 return rc;
2374}
2375
2376static int
2377read_data_into_pages(struct TCP_Server_Info *server, struct page **pages,
2378 unsigned int npages, unsigned int len)
2379{
2380 int i;
2381 int length;
2382
2383 for (i = 0; i < npages; i++) {
2384 struct page *page = pages[i];
2385 size_t n;
2386
2387 n = len;
2388 if (len >= PAGE_SIZE) {
2389 /* enough data to fill the page */
2390 n = PAGE_SIZE;
2391 len -= n;
2392 } else {
2393 zero_user(page, len, PAGE_SIZE - len);
2394 len = 0;
2395 }
2396 length = cifs_read_page_from_socket(server, page, n);
2397 if (length < 0)
2398 return length;
2399 server->total_read += length;
2400 }
2401
2402 return 0;
2403}
2404
2405static int
2406init_read_bvec(struct page **pages, unsigned int npages, unsigned int data_size,
2407 unsigned int cur_off, struct bio_vec **page_vec)
2408{
2409 struct bio_vec *bvec;
2410 int i;
2411
2412 bvec = kcalloc(npages, sizeof(struct bio_vec), GFP_KERNEL);
2413 if (!bvec)
2414 return -ENOMEM;
2415
2416 for (i = 0; i < npages; i++) {
2417 bvec[i].bv_page = pages[i];
2418 bvec[i].bv_offset = (i == 0) ? cur_off : 0;
2419 bvec[i].bv_len = min_t(unsigned int, PAGE_SIZE, data_size);
2420 data_size -= bvec[i].bv_len;
2421 }
2422
2423 if (data_size != 0) {
2424 cifs_dbg(VFS, "%s: something went wrong\n", __func__);
2425 kfree(bvec);
2426 return -EIO;
2427 }
2428
2429 *page_vec = bvec;
2430 return 0;
2431}
2432
2433static int
2434handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
2435 char *buf, unsigned int buf_len, struct page **pages,
2436 unsigned int npages, unsigned int page_data_size)
2437{
2438 unsigned int data_offset;
2439 unsigned int data_len;
2440 unsigned int cur_off;
2441 unsigned int cur_page_idx;
2442 unsigned int pad_len;
2443 struct cifs_readdata *rdata = mid->callback_data;
2444 struct smb2_sync_hdr *shdr = get_sync_hdr(buf);
2445 struct bio_vec *bvec = NULL;
2446 struct iov_iter iter;
2447 struct kvec iov;
2448 int length;
2449 bool use_rdma_mr = false;
2450
2451 if (shdr->Command != SMB2_READ) {
2452 cifs_dbg(VFS, "only big read responses are supported\n");
2453 return -ENOTSUPP;
2454 }
2455
2456 if (server->ops->is_session_expired &&
2457 server->ops->is_session_expired(buf)) {
2458 cifs_reconnect(server);
2459 wake_up(&server->response_q);
2460 return -1;
2461 }
2462
2463 if (server->ops->is_status_pending &&
2464 server->ops->is_status_pending(buf, server, 0))
2465 return -1;
2466
2467 rdata->result = server->ops->map_error(buf, false);
2468 if (rdata->result != 0) {
2469 cifs_dbg(FYI, "%s: server returned error %d\n",
2470 __func__, rdata->result);
2471 dequeue_mid(mid, rdata->result);
2472 return 0;
2473 }
2474
2475 data_offset = server->ops->read_data_offset(buf) + server->vals->header_preamble_size;
2476#ifdef CONFIG_CIFS_SMB_DIRECT
2477 use_rdma_mr = rdata->mr;
2478#endif
2479 data_len = server->ops->read_data_length(buf, use_rdma_mr);
2480
2481 if (data_offset < server->vals->read_rsp_size) {
2482 /*
2483 * win2k8 sometimes sends an offset of 0 when the read
2484 * is beyond the EOF. Treat it as if the data starts just after
2485 * the header.
2486 */
2487 cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n",
2488 __func__, data_offset);
2489 data_offset = server->vals->read_rsp_size;
2490 } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) {
2491 /* data_offset is beyond the end of smallbuf */
2492 cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n",
2493 __func__, data_offset);
2494 rdata->result = -EIO;
2495 dequeue_mid(mid, rdata->result);
2496 return 0;
2497 }
2498
2499 pad_len = data_offset - server->vals->read_rsp_size;
2500
2501 if (buf_len <= data_offset) {
2502 /* read response payload is in pages */
2503 cur_page_idx = pad_len / PAGE_SIZE;
2504 cur_off = pad_len % PAGE_SIZE;
2505
2506 if (cur_page_idx != 0) {
2507 /* data offset is beyond the 1st page of response */
2508 cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n",
2509 __func__, data_offset);
2510 rdata->result = -EIO;
2511 dequeue_mid(mid, rdata->result);
2512 return 0;
2513 }
2514
2515 if (data_len > page_data_size - pad_len) {
2516 /* data_len is corrupt -- discard frame */
2517 rdata->result = -EIO;
2518 dequeue_mid(mid, rdata->result);
2519 return 0;
2520 }
2521
2522 rdata->result = init_read_bvec(pages, npages, page_data_size,
2523 cur_off, &bvec);
2524 if (rdata->result != 0) {
2525 dequeue_mid(mid, rdata->result);
2526 return 0;
2527 }
2528
2529 iov_iter_bvec(&iter, WRITE | ITER_BVEC, bvec, npages, data_len);
2530 } else if (buf_len >= data_offset + data_len) {
2531 /* read response payload is in buf */
2532 WARN_ONCE(npages > 0, "read data can be either in buf or in pages");
2533 iov.iov_base = buf + data_offset;
2534 iov.iov_len = data_len;
2535 iov_iter_kvec(&iter, WRITE | ITER_KVEC, &iov, 1, data_len);
2536 } else {
2537 /* read response payload cannot be in both buf and pages */
2538 WARN_ONCE(1, "buf can not contain only a part of read data");
2539 rdata->result = -EIO;
2540 dequeue_mid(mid, rdata->result);
2541 return 0;
2542 }
2543
2544 /* set up first iov for signature check */
2545 rdata->iov[0].iov_base = buf;
2546 rdata->iov[0].iov_len = 4;
2547 rdata->iov[1].iov_base = buf + 4;
2548 rdata->iov[1].iov_len = server->vals->read_rsp_size - 4;
2549 cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
2550 rdata->iov[0].iov_base, server->vals->read_rsp_size);
2551
2552 length = rdata->copy_into_pages(server, rdata, &iter);
2553
2554 kfree(bvec);
2555
2556 if (length < 0)
2557 return length;
2558
2559 dequeue_mid(mid, false);
2560 return length;
2561}
2562
2563static int
2564receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2565{
2566 char *buf = server->smallbuf;
2567 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2568 unsigned int npages;
2569 struct page **pages;
2570 unsigned int len;
2571 unsigned int buflen = server->pdu_size + server->vals->header_preamble_size;
2572 int rc;
2573 int i = 0;
2574
2575 len = min_t(unsigned int, buflen, server->vals->read_rsp_size -
2576 server->vals->header_preamble_size +
2577 sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1;
2578
2579 rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len);
2580 if (rc < 0)
2581 return rc;
2582 server->total_read += rc;
2583
2584 len = le32_to_cpu(tr_hdr->OriginalMessageSize) +
2585 server->vals->header_preamble_size -
2586 server->vals->read_rsp_size;
2587 npages = DIV_ROUND_UP(len, PAGE_SIZE);
2588
2589 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
2590 if (!pages) {
2591 rc = -ENOMEM;
2592 goto discard_data;
2593 }
2594
2595 for (; i < npages; i++) {
2596 pages[i] = alloc_page(GFP_KERNEL|__GFP_HIGHMEM);
2597 if (!pages[i]) {
2598 rc = -ENOMEM;
2599 goto discard_data;
2600 }
2601 }
2602
2603 /* read read data into pages */
2604 rc = read_data_into_pages(server, pages, npages, len);
2605 if (rc)
2606 goto free_pages;
2607
2608 rc = cifs_discard_remaining_data(server);
2609 if (rc)
2610 goto free_pages;
2611
2612 rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size -
2613 server->vals->header_preamble_size,
2614 pages, npages, len);
2615 if (rc)
2616 goto free_pages;
2617
2618 *mid = smb2_find_mid(server, buf);
2619 if (*mid == NULL)
2620 cifs_dbg(FYI, "mid not found\n");
2621 else {
2622 cifs_dbg(FYI, "mid found\n");
2623 (*mid)->decrypted = true;
2624 rc = handle_read_data(server, *mid, buf,
2625 server->vals->read_rsp_size,
2626 pages, npages, len);
2627 }
2628
2629free_pages:
2630 for (i = i - 1; i >= 0; i--)
2631 put_page(pages[i]);
2632 kfree(pages);
2633 return rc;
2634discard_data:
2635 cifs_discard_remaining_data(server);
2636 goto free_pages;
2637}
2638
2639static int
2640receive_encrypted_standard(struct TCP_Server_Info *server,
2641 struct mid_q_entry **mid)
2642{
2643 int length;
2644 char *buf = server->smallbuf;
2645 unsigned int pdu_length = server->pdu_size;
2646 unsigned int buf_size;
2647 struct mid_q_entry *mid_entry;
2648
2649 /* switch to large buffer if too big for a small one */
2650 if (pdu_length + server->vals->header_preamble_size > MAX_CIFS_SMALL_BUFFER_SIZE) {
2651 server->large_buf = true;
2652 memcpy(server->bigbuf, buf, server->total_read);
2653 buf = server->bigbuf;
2654 }
2655
2656 /* now read the rest */
2657 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
2658 pdu_length - HEADER_SIZE(server) + 1 +
2659 server->vals->header_preamble_size);
2660 if (length < 0)
2661 return length;
2662 server->total_read += length;
2663
2664 buf_size = pdu_length + server->vals->header_preamble_size - sizeof(struct smb2_transform_hdr);
2665 length = decrypt_raw_data(server, buf, buf_size, NULL, 0, 0);
2666 if (length)
2667 return length;
2668
2669 mid_entry = smb2_find_mid(server, buf);
2670 if (mid_entry == NULL)
2671 cifs_dbg(FYI, "mid not found\n");
2672 else {
2673 cifs_dbg(FYI, "mid found\n");
2674 mid_entry->decrypted = true;
2675 }
2676
2677 *mid = mid_entry;
2678
2679 if (mid_entry && mid_entry->handle)
2680 return mid_entry->handle(server, mid_entry);
2681
2682 return cifs_handle_standard(server, mid_entry);
2683}
2684
2685static int
2686smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mid)
2687{
2688 char *buf = server->smallbuf;
2689 unsigned int pdu_length = server->pdu_size;
2690 struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf;
2691 unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize);
2692
2693 if (pdu_length + server->vals->header_preamble_size < sizeof(struct smb2_transform_hdr) +
2694 sizeof(struct smb2_sync_hdr)) {
2695 cifs_dbg(VFS, "Transform message is too small (%u)\n",
2696 pdu_length);
2697 cifs_reconnect(server);
2698 wake_up(&server->response_q);
2699 return -ECONNABORTED;
2700 }
2701
2702 if (pdu_length + server->vals->header_preamble_size < orig_len + sizeof(struct smb2_transform_hdr)) {
2703 cifs_dbg(VFS, "Transform message is broken\n");
2704 cifs_reconnect(server);
2705 wake_up(&server->response_q);
2706 return -ECONNABORTED;
2707 }
2708
2709 if (pdu_length + server->vals->header_preamble_size > CIFSMaxBufSize + MAX_HEADER_SIZE(server))
2710 return receive_encrypted_read(server, mid);
2711
2712 return receive_encrypted_standard(server, mid);
2713}
2714
2715int
2716smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid)
2717{
2718 char *buf = server->large_buf ? server->bigbuf : server->smallbuf;
2719
2720 return handle_read_data(server, mid, buf, server->pdu_size +
2721 server->vals->header_preamble_size,
2722 NULL, 0, 0);
2723}
2724
2725struct smb_version_operations smb20_operations = {
2726 .compare_fids = smb2_compare_fids,
2727 .setup_request = smb2_setup_request,
2728 .setup_async_request = smb2_setup_async_request,
2729 .check_receive = smb2_check_receive,
2730 .add_credits = smb2_add_credits,
2731 .set_credits = smb2_set_credits,
2732 .get_credits_field = smb2_get_credits_field,
2733 .get_credits = smb2_get_credits,
2734 .wait_mtu_credits = cifs_wait_mtu_credits,
2735 .get_next_mid = smb2_get_next_mid,
2736 .read_data_offset = smb2_read_data_offset,
2737 .read_data_length = smb2_read_data_length,
2738 .map_error = map_smb2_to_linux_error,
2739 .find_mid = smb2_find_mid,
2740 .check_message = smb2_check_message,
2741 .dump_detail = smb2_dump_detail,
2742 .clear_stats = smb2_clear_stats,
2743 .print_stats = smb2_print_stats,
2744 .is_oplock_break = smb2_is_valid_oplock_break,
2745 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2746 .downgrade_oplock = smb2_downgrade_oplock,
2747 .need_neg = smb2_need_neg,
2748 .negotiate = smb2_negotiate,
2749 .negotiate_wsize = smb2_negotiate_wsize,
2750 .negotiate_rsize = smb2_negotiate_rsize,
2751 .sess_setup = SMB2_sess_setup,
2752 .logoff = SMB2_logoff,
2753 .tree_connect = SMB2_tcon,
2754 .tree_disconnect = SMB2_tdis,
2755 .qfs_tcon = smb2_qfs_tcon,
2756 .is_path_accessible = smb2_is_path_accessible,
2757 .can_echo = smb2_can_echo,
2758 .echo = SMB2_echo,
2759 .query_path_info = smb2_query_path_info,
2760 .get_srv_inum = smb2_get_srv_inum,
2761 .query_file_info = smb2_query_file_info,
2762 .set_path_size = smb2_set_path_size,
2763 .set_file_size = smb2_set_file_size,
2764 .set_file_info = smb2_set_file_info,
2765 .set_compression = smb2_set_compression,
2766 .mkdir = smb2_mkdir,
2767 .mkdir_setinfo = smb2_mkdir_setinfo,
2768 .rmdir = smb2_rmdir,
2769 .unlink = smb2_unlink,
2770 .rename = smb2_rename_path,
2771 .create_hardlink = smb2_create_hardlink,
2772 .query_symlink = smb2_query_symlink,
2773 .query_mf_symlink = smb3_query_mf_symlink,
2774 .create_mf_symlink = smb3_create_mf_symlink,
2775 .open = smb2_open_file,
2776 .set_fid = smb2_set_fid,
2777 .close = smb2_close_file,
2778 .flush = smb2_flush_file,
2779 .async_readv = smb2_async_readv,
2780 .async_writev = smb2_async_writev,
2781 .sync_read = smb2_sync_read,
2782 .sync_write = smb2_sync_write,
2783 .query_dir_first = smb2_query_dir_first,
2784 .query_dir_next = smb2_query_dir_next,
2785 .close_dir = smb2_close_dir,
2786 .calc_smb_size = smb2_calc_size,
2787 .is_status_pending = smb2_is_status_pending,
2788 .is_session_expired = smb2_is_session_expired,
2789 .oplock_response = smb2_oplock_response,
2790 .queryfs = smb2_queryfs,
2791 .mand_lock = smb2_mand_lock,
2792 .mand_unlock_range = smb2_unlock_range,
2793 .push_mand_locks = smb2_push_mandatory_locks,
2794 .get_lease_key = smb2_get_lease_key,
2795 .set_lease_key = smb2_set_lease_key,
2796 .new_lease_key = smb2_new_lease_key,
2797 .calc_signature = smb2_calc_signature,
2798 .is_read_op = smb2_is_read_op,
2799 .set_oplock_level = smb2_set_oplock_level,
2800 .create_lease_buf = smb2_create_lease_buf,
2801 .parse_lease_buf = smb2_parse_lease_buf,
2802 .copychunk_range = smb2_copychunk_range,
2803 .wp_retry_size = smb2_wp_retry_size,
2804 .dir_needs_close = smb2_dir_needs_close,
2805 .get_dfs_refer = smb2_get_dfs_refer,
2806 .select_sectype = smb2_select_sectype,
2807#ifdef CONFIG_CIFS_XATTR
2808 .query_all_EAs = smb2_query_eas,
2809 .set_EA = smb2_set_ea,
2810#endif /* CIFS_XATTR */
2811#ifdef CONFIG_CIFS_ACL
2812 .get_acl = get_smb2_acl,
2813 .get_acl_by_fid = get_smb2_acl_by_fid,
2814 .set_acl = set_smb2_acl,
2815#endif /* CIFS_ACL */
2816};
2817
2818struct smb_version_operations smb21_operations = {
2819 .compare_fids = smb2_compare_fids,
2820 .setup_request = smb2_setup_request,
2821 .setup_async_request = smb2_setup_async_request,
2822 .check_receive = smb2_check_receive,
2823 .add_credits = smb2_add_credits,
2824 .set_credits = smb2_set_credits,
2825 .get_credits_field = smb2_get_credits_field,
2826 .get_credits = smb2_get_credits,
2827 .wait_mtu_credits = smb2_wait_mtu_credits,
2828 .get_next_mid = smb2_get_next_mid,
2829 .read_data_offset = smb2_read_data_offset,
2830 .read_data_length = smb2_read_data_length,
2831 .map_error = map_smb2_to_linux_error,
2832 .find_mid = smb2_find_mid,
2833 .check_message = smb2_check_message,
2834 .dump_detail = smb2_dump_detail,
2835 .clear_stats = smb2_clear_stats,
2836 .print_stats = smb2_print_stats,
2837 .is_oplock_break = smb2_is_valid_oplock_break,
2838 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2839 .downgrade_oplock = smb2_downgrade_oplock,
2840 .need_neg = smb2_need_neg,
2841 .negotiate = smb2_negotiate,
2842 .negotiate_wsize = smb2_negotiate_wsize,
2843 .negotiate_rsize = smb2_negotiate_rsize,
2844 .sess_setup = SMB2_sess_setup,
2845 .logoff = SMB2_logoff,
2846 .tree_connect = SMB2_tcon,
2847 .tree_disconnect = SMB2_tdis,
2848 .qfs_tcon = smb2_qfs_tcon,
2849 .is_path_accessible = smb2_is_path_accessible,
2850 .can_echo = smb2_can_echo,
2851 .echo = SMB2_echo,
2852 .query_path_info = smb2_query_path_info,
2853 .get_srv_inum = smb2_get_srv_inum,
2854 .query_file_info = smb2_query_file_info,
2855 .set_path_size = smb2_set_path_size,
2856 .set_file_size = smb2_set_file_size,
2857 .set_file_info = smb2_set_file_info,
2858 .set_compression = smb2_set_compression,
2859 .mkdir = smb2_mkdir,
2860 .mkdir_setinfo = smb2_mkdir_setinfo,
2861 .rmdir = smb2_rmdir,
2862 .unlink = smb2_unlink,
2863 .rename = smb2_rename_path,
2864 .create_hardlink = smb2_create_hardlink,
2865 .query_symlink = smb2_query_symlink,
2866 .query_mf_symlink = smb3_query_mf_symlink,
2867 .create_mf_symlink = smb3_create_mf_symlink,
2868 .open = smb2_open_file,
2869 .set_fid = smb2_set_fid,
2870 .close = smb2_close_file,
2871 .flush = smb2_flush_file,
2872 .async_readv = smb2_async_readv,
2873 .async_writev = smb2_async_writev,
2874 .sync_read = smb2_sync_read,
2875 .sync_write = smb2_sync_write,
2876 .query_dir_first = smb2_query_dir_first,
2877 .query_dir_next = smb2_query_dir_next,
2878 .close_dir = smb2_close_dir,
2879 .calc_smb_size = smb2_calc_size,
2880 .is_status_pending = smb2_is_status_pending,
2881 .is_session_expired = smb2_is_session_expired,
2882 .oplock_response = smb2_oplock_response,
2883 .queryfs = smb2_queryfs,
2884 .mand_lock = smb2_mand_lock,
2885 .mand_unlock_range = smb2_unlock_range,
2886 .push_mand_locks = smb2_push_mandatory_locks,
2887 .get_lease_key = smb2_get_lease_key,
2888 .set_lease_key = smb2_set_lease_key,
2889 .new_lease_key = smb2_new_lease_key,
2890 .calc_signature = smb2_calc_signature,
2891 .is_read_op = smb21_is_read_op,
2892 .set_oplock_level = smb21_set_oplock_level,
2893 .create_lease_buf = smb2_create_lease_buf,
2894 .parse_lease_buf = smb2_parse_lease_buf,
2895 .copychunk_range = smb2_copychunk_range,
2896 .wp_retry_size = smb2_wp_retry_size,
2897 .dir_needs_close = smb2_dir_needs_close,
2898 .enum_snapshots = smb3_enum_snapshots,
2899 .get_dfs_refer = smb2_get_dfs_refer,
2900 .select_sectype = smb2_select_sectype,
2901#ifdef CONFIG_CIFS_XATTR
2902 .query_all_EAs = smb2_query_eas,
2903 .set_EA = smb2_set_ea,
2904#endif /* CIFS_XATTR */
2905#ifdef CONFIG_CIFS_ACL
2906 .get_acl = get_smb2_acl,
2907 .get_acl_by_fid = get_smb2_acl_by_fid,
2908 .set_acl = set_smb2_acl,
2909#endif /* CIFS_ACL */
2910};
2911
2912struct smb_version_operations smb30_operations = {
2913 .compare_fids = smb2_compare_fids,
2914 .setup_request = smb2_setup_request,
2915 .setup_async_request = smb2_setup_async_request,
2916 .check_receive = smb2_check_receive,
2917 .add_credits = smb2_add_credits,
2918 .set_credits = smb2_set_credits,
2919 .get_credits_field = smb2_get_credits_field,
2920 .get_credits = smb2_get_credits,
2921 .wait_mtu_credits = smb2_wait_mtu_credits,
2922 .get_next_mid = smb2_get_next_mid,
2923 .read_data_offset = smb2_read_data_offset,
2924 .read_data_length = smb2_read_data_length,
2925 .map_error = map_smb2_to_linux_error,
2926 .find_mid = smb2_find_mid,
2927 .check_message = smb2_check_message,
2928 .dump_detail = smb2_dump_detail,
2929 .clear_stats = smb2_clear_stats,
2930 .print_stats = smb2_print_stats,
2931 .dump_share_caps = smb2_dump_share_caps,
2932 .is_oplock_break = smb2_is_valid_oplock_break,
2933 .handle_cancelled_mid = smb2_handle_cancelled_mid,
2934 .downgrade_oplock = smb2_downgrade_oplock,
2935 .need_neg = smb2_need_neg,
2936 .negotiate = smb2_negotiate,
2937 .negotiate_wsize = smb2_negotiate_wsize,
2938 .negotiate_rsize = smb2_negotiate_rsize,
2939 .sess_setup = SMB2_sess_setup,
2940 .logoff = SMB2_logoff,
2941 .tree_connect = SMB2_tcon,
2942 .tree_disconnect = SMB2_tdis,
2943 .qfs_tcon = smb3_qfs_tcon,
2944 .is_path_accessible = smb2_is_path_accessible,
2945 .can_echo = smb2_can_echo,
2946 .echo = SMB2_echo,
2947 .query_path_info = smb2_query_path_info,
2948 .get_srv_inum = smb2_get_srv_inum,
2949 .query_file_info = smb2_query_file_info,
2950 .set_path_size = smb2_set_path_size,
2951 .set_file_size = smb2_set_file_size,
2952 .set_file_info = smb2_set_file_info,
2953 .set_compression = smb2_set_compression,
2954 .mkdir = smb2_mkdir,
2955 .mkdir_setinfo = smb2_mkdir_setinfo,
2956 .rmdir = smb2_rmdir,
2957 .unlink = smb2_unlink,
2958 .rename = smb2_rename_path,
2959 .create_hardlink = smb2_create_hardlink,
2960 .query_symlink = smb2_query_symlink,
2961 .query_mf_symlink = smb3_query_mf_symlink,
2962 .create_mf_symlink = smb3_create_mf_symlink,
2963 .open = smb2_open_file,
2964 .set_fid = smb2_set_fid,
2965 .close = smb2_close_file,
2966 .flush = smb2_flush_file,
2967 .async_readv = smb2_async_readv,
2968 .async_writev = smb2_async_writev,
2969 .sync_read = smb2_sync_read,
2970 .sync_write = smb2_sync_write,
2971 .query_dir_first = smb2_query_dir_first,
2972 .query_dir_next = smb2_query_dir_next,
2973 .close_dir = smb2_close_dir,
2974 .calc_smb_size = smb2_calc_size,
2975 .is_status_pending = smb2_is_status_pending,
2976 .is_session_expired = smb2_is_session_expired,
2977 .oplock_response = smb2_oplock_response,
2978 .queryfs = smb2_queryfs,
2979 .mand_lock = smb2_mand_lock,
2980 .mand_unlock_range = smb2_unlock_range,
2981 .push_mand_locks = smb2_push_mandatory_locks,
2982 .get_lease_key = smb2_get_lease_key,
2983 .set_lease_key = smb2_set_lease_key,
2984 .new_lease_key = smb2_new_lease_key,
2985 .generate_signingkey = generate_smb30signingkey,
2986 .calc_signature = smb3_calc_signature,
2987 .set_integrity = smb3_set_integrity,
2988 .is_read_op = smb21_is_read_op,
2989 .set_oplock_level = smb3_set_oplock_level,
2990 .create_lease_buf = smb3_create_lease_buf,
2991 .parse_lease_buf = smb3_parse_lease_buf,
2992 .copychunk_range = smb2_copychunk_range,
2993 .duplicate_extents = smb2_duplicate_extents,
2994 .validate_negotiate = smb3_validate_negotiate,
2995 .wp_retry_size = smb2_wp_retry_size,
2996 .dir_needs_close = smb2_dir_needs_close,
2997 .fallocate = smb3_fallocate,
2998 .enum_snapshots = smb3_enum_snapshots,
2999 .init_transform_rq = smb3_init_transform_rq,
3000 .free_transform_rq = smb3_free_transform_rq,
3001 .is_transform_hdr = smb3_is_transform_hdr,
3002 .receive_transform = smb3_receive_transform,
3003 .get_dfs_refer = smb2_get_dfs_refer,
3004 .select_sectype = smb2_select_sectype,
3005#ifdef CONFIG_CIFS_XATTR
3006 .query_all_EAs = smb2_query_eas,
3007 .set_EA = smb2_set_ea,
3008#endif /* CIFS_XATTR */
3009#ifdef CONFIG_CIFS_ACL
3010 .get_acl = get_smb2_acl,
3011 .get_acl_by_fid = get_smb2_acl_by_fid,
3012 .set_acl = set_smb2_acl,
3013#endif /* CIFS_ACL */
3014};
3015
3016#ifdef CONFIG_CIFS_SMB311
3017struct smb_version_operations smb311_operations = {
3018 .compare_fids = smb2_compare_fids,
3019 .setup_request = smb2_setup_request,
3020 .setup_async_request = smb2_setup_async_request,
3021 .check_receive = smb2_check_receive,
3022 .add_credits = smb2_add_credits,
3023 .set_credits = smb2_set_credits,
3024 .get_credits_field = smb2_get_credits_field,
3025 .get_credits = smb2_get_credits,
3026 .wait_mtu_credits = smb2_wait_mtu_credits,
3027 .get_next_mid = smb2_get_next_mid,
3028 .read_data_offset = smb2_read_data_offset,
3029 .read_data_length = smb2_read_data_length,
3030 .map_error = map_smb2_to_linux_error,
3031 .find_mid = smb2_find_mid,
3032 .check_message = smb2_check_message,
3033 .dump_detail = smb2_dump_detail,
3034 .clear_stats = smb2_clear_stats,
3035 .print_stats = smb2_print_stats,
3036 .dump_share_caps = smb2_dump_share_caps,
3037 .is_oplock_break = smb2_is_valid_oplock_break,
3038 .handle_cancelled_mid = smb2_handle_cancelled_mid,
3039 .downgrade_oplock = smb2_downgrade_oplock,
3040 .need_neg = smb2_need_neg,
3041 .negotiate = smb2_negotiate,
3042 .negotiate_wsize = smb2_negotiate_wsize,
3043 .negotiate_rsize = smb2_negotiate_rsize,
3044 .sess_setup = SMB2_sess_setup,
3045 .logoff = SMB2_logoff,
3046 .tree_connect = SMB2_tcon,
3047 .tree_disconnect = SMB2_tdis,
3048 .qfs_tcon = smb3_qfs_tcon,
3049 .is_path_accessible = smb2_is_path_accessible,
3050 .can_echo = smb2_can_echo,
3051 .echo = SMB2_echo,
3052 .query_path_info = smb2_query_path_info,
3053 .get_srv_inum = smb2_get_srv_inum,
3054 .query_file_info = smb2_query_file_info,
3055 .set_path_size = smb2_set_path_size,
3056 .set_file_size = smb2_set_file_size,
3057 .set_file_info = smb2_set_file_info,
3058 .set_compression = smb2_set_compression,
3059 .mkdir = smb2_mkdir,
3060 .mkdir_setinfo = smb2_mkdir_setinfo,
3061 .rmdir = smb2_rmdir,
3062 .unlink = smb2_unlink,
3063 .rename = smb2_rename_path,
3064 .create_hardlink = smb2_create_hardlink,
3065 .query_symlink = smb2_query_symlink,
3066 .query_mf_symlink = smb3_query_mf_symlink,
3067 .create_mf_symlink = smb3_create_mf_symlink,
3068 .open = smb2_open_file,
3069 .set_fid = smb2_set_fid,
3070 .close = smb2_close_file,
3071 .flush = smb2_flush_file,
3072 .async_readv = smb2_async_readv,
3073 .async_writev = smb2_async_writev,
3074 .sync_read = smb2_sync_read,
3075 .sync_write = smb2_sync_write,
3076 .query_dir_first = smb2_query_dir_first,
3077 .query_dir_next = smb2_query_dir_next,
3078 .close_dir = smb2_close_dir,
3079 .calc_smb_size = smb2_calc_size,
3080 .is_status_pending = smb2_is_status_pending,
3081 .is_session_expired = smb2_is_session_expired,
3082 .oplock_response = smb2_oplock_response,
3083 .queryfs = smb2_queryfs,
3084 .mand_lock = smb2_mand_lock,
3085 .mand_unlock_range = smb2_unlock_range,
3086 .push_mand_locks = smb2_push_mandatory_locks,
3087 .get_lease_key = smb2_get_lease_key,
3088 .set_lease_key = smb2_set_lease_key,
3089 .new_lease_key = smb2_new_lease_key,
3090 .generate_signingkey = generate_smb311signingkey,
3091 .calc_signature = smb3_calc_signature,
3092 .set_integrity = smb3_set_integrity,
3093 .is_read_op = smb21_is_read_op,
3094 .set_oplock_level = smb3_set_oplock_level,
3095 .create_lease_buf = smb3_create_lease_buf,
3096 .parse_lease_buf = smb3_parse_lease_buf,
3097 .copychunk_range = smb2_copychunk_range,
3098 .duplicate_extents = smb2_duplicate_extents,
3099/* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
3100 .wp_retry_size = smb2_wp_retry_size,
3101 .dir_needs_close = smb2_dir_needs_close,
3102 .fallocate = smb3_fallocate,
3103 .enum_snapshots = smb3_enum_snapshots,
3104 .init_transform_rq = smb3_init_transform_rq,
3105 .free_transform_rq = smb3_free_transform_rq,
3106 .is_transform_hdr = smb3_is_transform_hdr,
3107 .receive_transform = smb3_receive_transform,
3108 .get_dfs_refer = smb2_get_dfs_refer,
3109 .select_sectype = smb2_select_sectype,
3110#ifdef CONFIG_CIFS_XATTR
3111 .query_all_EAs = smb2_query_eas,
3112 .set_EA = smb2_set_ea,
3113#endif /* CIFS_XATTR */
3114};
3115#endif /* CIFS_SMB311 */
3116
3117struct smb_version_values smb20_values = {
3118 .version_string = SMB20_VERSION_STRING,
3119 .protocol_id = SMB20_PROT_ID,
3120 .req_capabilities = 0, /* MBZ */
3121 .large_lock_type = 0,
3122 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3123 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3124 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3125 .header_size = sizeof(struct smb2_hdr),
3126 .header_preamble_size = 4,
3127 .max_header_size = MAX_SMB2_HDR_SIZE,
3128 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3129 .lock_cmd = SMB2_LOCK,
3130 .cap_unix = 0,
3131 .cap_nt_find = SMB2_NT_FIND,
3132 .cap_large_files = SMB2_LARGE_FILES,
3133 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3134 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3135 .create_lease_size = sizeof(struct create_lease),
3136};
3137
3138struct smb_version_values smb21_values = {
3139 .version_string = SMB21_VERSION_STRING,
3140 .protocol_id = SMB21_PROT_ID,
3141 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
3142 .large_lock_type = 0,
3143 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3144 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3145 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3146 .header_size = sizeof(struct smb2_hdr),
3147 .header_preamble_size = 4,
3148 .max_header_size = MAX_SMB2_HDR_SIZE,
3149 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3150 .lock_cmd = SMB2_LOCK,
3151 .cap_unix = 0,
3152 .cap_nt_find = SMB2_NT_FIND,
3153 .cap_large_files = SMB2_LARGE_FILES,
3154 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3155 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3156 .create_lease_size = sizeof(struct create_lease),
3157};
3158
3159struct smb_version_values smb3any_values = {
3160 .version_string = SMB3ANY_VERSION_STRING,
3161 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3162 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3163 .large_lock_type = 0,
3164 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3165 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3166 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3167 .header_size = sizeof(struct smb2_hdr),
3168 .header_preamble_size = 4,
3169 .max_header_size = MAX_SMB2_HDR_SIZE,
3170 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3171 .lock_cmd = SMB2_LOCK,
3172 .cap_unix = 0,
3173 .cap_nt_find = SMB2_NT_FIND,
3174 .cap_large_files = SMB2_LARGE_FILES,
3175 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3176 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3177 .create_lease_size = sizeof(struct create_lease_v2),
3178};
3179
3180struct smb_version_values smbdefault_values = {
3181 .version_string = SMBDEFAULT_VERSION_STRING,
3182 .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */
3183 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3184 .large_lock_type = 0,
3185 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3186 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3187 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3188 .header_size = sizeof(struct smb2_hdr),
3189 .header_preamble_size = 4,
3190 .max_header_size = MAX_SMB2_HDR_SIZE,
3191 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3192 .lock_cmd = SMB2_LOCK,
3193 .cap_unix = 0,
3194 .cap_nt_find = SMB2_NT_FIND,
3195 .cap_large_files = SMB2_LARGE_FILES,
3196 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3197 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3198 .create_lease_size = sizeof(struct create_lease_v2),
3199};
3200
3201struct smb_version_values smb30_values = {
3202 .version_string = SMB30_VERSION_STRING,
3203 .protocol_id = SMB30_PROT_ID,
3204 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3205 .large_lock_type = 0,
3206 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3207 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3208 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3209 .header_size = sizeof(struct smb2_hdr),
3210 .header_preamble_size = 4,
3211 .max_header_size = MAX_SMB2_HDR_SIZE,
3212 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3213 .lock_cmd = SMB2_LOCK,
3214 .cap_unix = 0,
3215 .cap_nt_find = SMB2_NT_FIND,
3216 .cap_large_files = SMB2_LARGE_FILES,
3217 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3218 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3219 .create_lease_size = sizeof(struct create_lease_v2),
3220};
3221
3222struct smb_version_values smb302_values = {
3223 .version_string = SMB302_VERSION_STRING,
3224 .protocol_id = SMB302_PROT_ID,
3225 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3226 .large_lock_type = 0,
3227 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3228 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3229 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3230 .header_size = sizeof(struct smb2_hdr),
3231 .header_preamble_size = 4,
3232 .max_header_size = MAX_SMB2_HDR_SIZE,
3233 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3234 .lock_cmd = SMB2_LOCK,
3235 .cap_unix = 0,
3236 .cap_nt_find = SMB2_NT_FIND,
3237 .cap_large_files = SMB2_LARGE_FILES,
3238 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3239 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3240 .create_lease_size = sizeof(struct create_lease_v2),
3241};
3242
3243#ifdef CONFIG_CIFS_SMB311
3244struct smb_version_values smb311_values = {
3245 .version_string = SMB311_VERSION_STRING,
3246 .protocol_id = SMB311_PROT_ID,
3247 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION,
3248 .large_lock_type = 0,
3249 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
3250 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
3251 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
3252 .header_size = sizeof(struct smb2_hdr),
3253 .header_preamble_size = 4,
3254 .max_header_size = MAX_SMB2_HDR_SIZE,
3255 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
3256 .lock_cmd = SMB2_LOCK,
3257 .cap_unix = 0,
3258 .cap_nt_find = SMB2_NT_FIND,
3259 .cap_large_files = SMB2_LARGE_FILES,
3260 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
3261 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
3262 .create_lease_size = sizeof(struct create_lease_v2),
3263};
3264#endif /* SMB311 */