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cifs: get rid of ->f_path.dentry->d_sb uses, add a new helper
[linux-2.6/btrfs-unstable.git] / fs / cifs / smb2ops.c
blobc5f521bcdee247cf0ffc2b2f5af936467fd778aa
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 "cifsglob.h"
24 #include "smb2pdu.h"
25 #include "smb2proto.h"
26 #include "cifsproto.h"
27 #include "cifs_debug.h"
28 #include "cifs_unicode.h"
29 #include "smb2status.h"
30 #include "smb2glob.h"
31
32 static int
33 change_conf(struct TCP_Server_Info *server)
34 {
35 server->credits += server->echo_credits + server->oplock_credits;
36 server->oplock_credits = server->echo_credits = 0;
37 switch (server->credits) {
38 case 0:
39 return -1;
40 case 1:
41 server->echoes = false;
42 server->oplocks = false;
43 cifs_dbg(VFS, "disabling echoes and oplocks\n");
44 break;
45 case 2:
46 server->echoes = true;
47 server->oplocks = false;
48 server->echo_credits = 1;
49 cifs_dbg(FYI, "disabling oplocks\n");
50 break;
51 default:
52 server->echoes = true;
53 server->oplocks = true;
54 server->echo_credits = 1;
55 server->oplock_credits = 1;
56 }
57 server->credits -= server->echo_credits + server->oplock_credits;
58 return 0;
59 }
60
61 static void
62 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
63 const int optype)
64 {
65 int *val, rc = 0;
66 spin_lock(&server->req_lock);
67 val = server->ops->get_credits_field(server, optype);
68 *val += add;
69 server->in_flight--;
70 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
71 rc = change_conf(server);
72 /*
73 * Sometimes server returns 0 credits on oplock break ack - we need to
74 * rebalance credits in this case.
75 */
76 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
77 server->oplocks) {
78 if (server->credits > 1) {
79 server->credits--;
80 server->oplock_credits++;
81 }
82 }
83 spin_unlock(&server->req_lock);
84 wake_up(&server->request_q);
85 if (rc)
86 cifs_reconnect(server);
87 }
88
89 static void
90 smb2_set_credits(struct TCP_Server_Info *server, const int val)
91 {
92 spin_lock(&server->req_lock);
93 server->credits = val;
94 spin_unlock(&server->req_lock);
95 }
96
97 static int *
98 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
99 {
100 switch (optype) {
101 case CIFS_ECHO_OP:
102 return &server->echo_credits;
103 case CIFS_OBREAK_OP:
104 return &server->oplock_credits;
105 default:
106 return &server->credits;
107 }
108 }
109
110 static unsigned int
111 smb2_get_credits(struct mid_q_entry *mid)
112 {
113 return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
114 }
115
116 static int
117 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
118 unsigned int *num, unsigned int *credits)
119 {
120 int rc = 0;
121 unsigned int scredits;
122
123 spin_lock(&server->req_lock);
124 while (1) {
125 if (server->credits <= 0) {
126 spin_unlock(&server->req_lock);
127 cifs_num_waiters_inc(server);
128 rc = wait_event_killable(server->request_q,
129 has_credits(server, &server->credits));
130 cifs_num_waiters_dec(server);
131 if (rc)
132 return rc;
133 spin_lock(&server->req_lock);
134 } else {
135 if (server->tcpStatus == CifsExiting) {
136 spin_unlock(&server->req_lock);
137 return -ENOENT;
138 }
139
140 scredits = server->credits;
141 /* can deadlock with reopen */
142 if (scredits == 1) {
143 *num = SMB2_MAX_BUFFER_SIZE;
144 *credits = 0;
145 break;
146 }
147
148 /* leave one credit for a possible reopen */
149 scredits--;
150 *num = min_t(unsigned int, size,
151 scredits * SMB2_MAX_BUFFER_SIZE);
152
153 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
154 server->credits -= *credits;
155 server->in_flight++;
156 break;
157 }
158 }
159 spin_unlock(&server->req_lock);
160 return rc;
161 }
162
163 static __u64
164 smb2_get_next_mid(struct TCP_Server_Info *server)
165 {
166 __u64 mid;
167 /* for SMB2 we need the current value */
168 spin_lock(&GlobalMid_Lock);
169 mid = server->CurrentMid++;
170 spin_unlock(&GlobalMid_Lock);
171 return mid;
172 }
173
174 static struct mid_q_entry *
175 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
176 {
177 struct mid_q_entry *mid;
178 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
179
180 spin_lock(&GlobalMid_Lock);
181 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
182 if ((mid->mid == hdr->MessageId) &&
183 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
184 (mid->command == hdr->Command)) {
185 spin_unlock(&GlobalMid_Lock);
186 return mid;
187 }
188 }
189 spin_unlock(&GlobalMid_Lock);
190 return NULL;
191 }
192
193 static void
194 smb2_dump_detail(void *buf)
195 {
196 #ifdef CONFIG_CIFS_DEBUG2
197 struct smb2_hdr *smb = (struct smb2_hdr *)buf;
198
199 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
200 smb->Command, smb->Status, smb->Flags, smb->MessageId,
201 smb->ProcessId);
202 cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
203 #endif
204 }
205
206 static bool
207 smb2_need_neg(struct TCP_Server_Info *server)
208 {
209 return server->max_read == 0;
210 }
211
212 static int
213 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
214 {
215 int rc;
216 ses->server->CurrentMid = 0;
217 rc = SMB2_negotiate(xid, ses);
218 /* BB we probably don't need to retry with modern servers */
219 if (rc == -EAGAIN)
220 rc = -EHOSTDOWN;
221 return rc;
222 }
223
224 static unsigned int
225 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
226 {
227 struct TCP_Server_Info *server = tcon->ses->server;
228 unsigned int wsize;
229
230 /* start with specified wsize, or default */
231 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
232 wsize = min_t(unsigned int, wsize, server->max_write);
233
234 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
235 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
236
237 return wsize;
238 }
239
240 static unsigned int
241 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
242 {
243 struct TCP_Server_Info *server = tcon->ses->server;
244 unsigned int rsize;
245
246 /* start with specified rsize, or default */
247 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
248 rsize = min_t(unsigned int, rsize, server->max_read);
249
250 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
251 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
252
253 return rsize;
254 }
255
256 #ifdef CONFIG_CIFS_STATS2
257 static int
258 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
259 {
260 int rc;
261 unsigned int ret_data_len = 0;
262 struct network_interface_info_ioctl_rsp *out_buf;
263
264 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
265 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
266 NULL /* no data input */, 0 /* no data input */,
267 (char **)&out_buf, &ret_data_len);
268 if (rc != 0)
269 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
270 else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
271 cifs_dbg(VFS, "server returned bad net interface info buf\n");
272 rc = -EINVAL;
273 } else {
274 /* Dump info on first interface */
275 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
276 le32_to_cpu(out_buf->Capability));
277 cifs_dbg(FYI, "Link Speed %lld\n",
278 le64_to_cpu(out_buf->LinkSpeed));
279 }
280
281 return rc;
282 }
283 #endif /* STATS2 */
284
285 static void
286 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
287 {
288 int rc;
289 __le16 srch_path = 0; /* Null - open root of share */
290 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
291 struct cifs_open_parms oparms;
292 struct cifs_fid fid;
293
294 oparms.tcon = tcon;
295 oparms.desired_access = FILE_READ_ATTRIBUTES;
296 oparms.disposition = FILE_OPEN;
297 oparms.create_options = 0;
298 oparms.fid = &fid;
299 oparms.reconnect = false;
300
301 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
302 if (rc)
303 return;
304
305 #ifdef CONFIG_CIFS_STATS2
306 SMB3_request_interfaces(xid, tcon);
307 #endif /* STATS2 */
308
309 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
310 FS_ATTRIBUTE_INFORMATION);
311 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
312 FS_DEVICE_INFORMATION);
313 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
314 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
315 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
316 return;
317 }
318
319 static void
320 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
321 {
322 int rc;
323 __le16 srch_path = 0; /* Null - open root of share */
324 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
325 struct cifs_open_parms oparms;
326 struct cifs_fid fid;
327
328 oparms.tcon = tcon;
329 oparms.desired_access = FILE_READ_ATTRIBUTES;
330 oparms.disposition = FILE_OPEN;
331 oparms.create_options = 0;
332 oparms.fid = &fid;
333 oparms.reconnect = false;
334
335 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
336 if (rc)
337 return;
338
339 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
340 FS_ATTRIBUTE_INFORMATION);
341 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
342 FS_DEVICE_INFORMATION);
343 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
344 return;
345 }
346
347 static int
348 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
349 struct cifs_sb_info *cifs_sb, const char *full_path)
350 {
351 int rc;
352 __le16 *utf16_path;
353 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
354 struct cifs_open_parms oparms;
355 struct cifs_fid fid;
356
357 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
358 if (!utf16_path)
359 return -ENOMEM;
360
361 oparms.tcon = tcon;
362 oparms.desired_access = FILE_READ_ATTRIBUTES;
363 oparms.disposition = FILE_OPEN;
364 oparms.create_options = 0;
365 oparms.fid = &fid;
366 oparms.reconnect = false;
367
368 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
369 if (rc) {
370 kfree(utf16_path);
371 return rc;
372 }
373
374 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
375 kfree(utf16_path);
376 return rc;
377 }
378
379 static int
380 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
381 struct cifs_sb_info *cifs_sb, const char *full_path,
382 u64 *uniqueid, FILE_ALL_INFO *data)
383 {
384 *uniqueid = le64_to_cpu(data->IndexNumber);
385 return 0;
386 }
387
388 static int
389 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
390 struct cifs_fid *fid, FILE_ALL_INFO *data)
391 {
392 int rc;
393 struct smb2_file_all_info *smb2_data;
394
395 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
396 GFP_KERNEL);
397 if (smb2_data == NULL)
398 return -ENOMEM;
399
400 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
401 smb2_data);
402 if (!rc)
403 move_smb2_info_to_cifs(data, smb2_data);
404 kfree(smb2_data);
405 return rc;
406 }
407
408 static bool
409 smb2_can_echo(struct TCP_Server_Info *server)
410 {
411 return server->echoes;
412 }
413
414 static void
415 smb2_clear_stats(struct cifs_tcon *tcon)
416 {
417 #ifdef CONFIG_CIFS_STATS
418 int i;
419 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
420 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
421 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
422 }
423 #endif
424 }
425
426 static void
427 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
428 {
429 seq_puts(m, "\n\tShare Capabilities:");
430 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
431 seq_puts(m, " DFS,");
432 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
433 seq_puts(m, " CONTINUOUS AVAILABILITY,");
434 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
435 seq_puts(m, " SCALEOUT,");
436 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
437 seq_puts(m, " CLUSTER,");
438 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
439 seq_puts(m, " ASYMMETRIC,");
440 if (tcon->capabilities == 0)
441 seq_puts(m, " None");
442 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
443 seq_puts(m, " Aligned,");
444 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
445 seq_puts(m, " Partition Aligned,");
446 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
447 seq_puts(m, " SSD,");
448 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
449 seq_puts(m, " TRIM-support,");
450
451 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
452 if (tcon->perf_sector_size)
453 seq_printf(m, "\tOptimal sector size: 0x%x",
454 tcon->perf_sector_size);
455 }
456
457 static void
458 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
459 {
460 #ifdef CONFIG_CIFS_STATS
461 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
462 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
463 seq_printf(m, "\nNegotiates: %d sent %d failed",
464 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
465 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
466 seq_printf(m, "\nSessionSetups: %d sent %d failed",
467 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
468 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
469 seq_printf(m, "\nLogoffs: %d sent %d failed",
470 atomic_read(&sent[SMB2_LOGOFF_HE]),
471 atomic_read(&failed[SMB2_LOGOFF_HE]));
472 seq_printf(m, "\nTreeConnects: %d sent %d failed",
473 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
474 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
475 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
476 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
477 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
478 seq_printf(m, "\nCreates: %d sent %d failed",
479 atomic_read(&sent[SMB2_CREATE_HE]),
480 atomic_read(&failed[SMB2_CREATE_HE]));
481 seq_printf(m, "\nCloses: %d sent %d failed",
482 atomic_read(&sent[SMB2_CLOSE_HE]),
483 atomic_read(&failed[SMB2_CLOSE_HE]));
484 seq_printf(m, "\nFlushes: %d sent %d failed",
485 atomic_read(&sent[SMB2_FLUSH_HE]),
486 atomic_read(&failed[SMB2_FLUSH_HE]));
487 seq_printf(m, "\nReads: %d sent %d failed",
488 atomic_read(&sent[SMB2_READ_HE]),
489 atomic_read(&failed[SMB2_READ_HE]));
490 seq_printf(m, "\nWrites: %d sent %d failed",
491 atomic_read(&sent[SMB2_WRITE_HE]),
492 atomic_read(&failed[SMB2_WRITE_HE]));
493 seq_printf(m, "\nLocks: %d sent %d failed",
494 atomic_read(&sent[SMB2_LOCK_HE]),
495 atomic_read(&failed[SMB2_LOCK_HE]));
496 seq_printf(m, "\nIOCTLs: %d sent %d failed",
497 atomic_read(&sent[SMB2_IOCTL_HE]),
498 atomic_read(&failed[SMB2_IOCTL_HE]));
499 seq_printf(m, "\nCancels: %d sent %d failed",
500 atomic_read(&sent[SMB2_CANCEL_HE]),
501 atomic_read(&failed[SMB2_CANCEL_HE]));
502 seq_printf(m, "\nEchos: %d sent %d failed",
503 atomic_read(&sent[SMB2_ECHO_HE]),
504 atomic_read(&failed[SMB2_ECHO_HE]));
505 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
506 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
507 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
508 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
509 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
510 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
511 seq_printf(m, "\nQueryInfos: %d sent %d failed",
512 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
513 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
514 seq_printf(m, "\nSetInfos: %d sent %d failed",
515 atomic_read(&sent[SMB2_SET_INFO_HE]),
516 atomic_read(&failed[SMB2_SET_INFO_HE]));
517 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
518 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
519 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
520 #endif
521 }
522
523 static void
524 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
525 {
526 struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
527 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
528
529 cfile->fid.persistent_fid = fid->persistent_fid;
530 cfile->fid.volatile_fid = fid->volatile_fid;
531 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
532 &fid->purge_cache);
533 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
534 }
535
536 static void
537 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
538 struct cifs_fid *fid)
539 {
540 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
541 }
542
543 static int
544 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
545 u64 persistent_fid, u64 volatile_fid,
546 struct copychunk_ioctl *pcchunk)
547 {
548 int rc;
549 unsigned int ret_data_len;
550 struct resume_key_req *res_key;
551
552 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
553 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
554 NULL, 0 /* no input */,
555 (char **)&res_key, &ret_data_len);
556
557 if (rc) {
558 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
559 goto req_res_key_exit;
560 }
561 if (ret_data_len < sizeof(struct resume_key_req)) {
562 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
563 rc = -EINVAL;
564 goto req_res_key_exit;
565 }
566 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
567
568 req_res_key_exit:
569 kfree(res_key);
570 return rc;
571 }
572
573 static int
574 smb2_clone_range(const unsigned int xid,
575 struct cifsFileInfo *srcfile,
576 struct cifsFileInfo *trgtfile, u64 src_off,
577 u64 len, u64 dest_off)
578 {
579 int rc;
580 unsigned int ret_data_len;
581 struct copychunk_ioctl *pcchunk;
582 struct copychunk_ioctl_rsp *retbuf = NULL;
583 struct cifs_tcon *tcon;
584 int chunks_copied = 0;
585 bool chunk_sizes_updated = false;
586
587 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
588
589 if (pcchunk == NULL)
590 return -ENOMEM;
591
592 cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
593 /* Request a key from the server to identify the source of the copy */
594 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
595 srcfile->fid.persistent_fid,
596 srcfile->fid.volatile_fid, pcchunk);
597
598 /* Note: request_res_key sets res_key null only if rc !=0 */
599 if (rc)
600 goto cchunk_out;
601
602 /* For now array only one chunk long, will make more flexible later */
603 pcchunk->ChunkCount = __constant_cpu_to_le32(1);
604 pcchunk->Reserved = 0;
605 pcchunk->Reserved2 = 0;
606
607 tcon = tlink_tcon(trgtfile->tlink);
608
609 while (len > 0) {
610 pcchunk->SourceOffset = cpu_to_le64(src_off);
611 pcchunk->TargetOffset = cpu_to_le64(dest_off);
612 pcchunk->Length =
613 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
614
615 /* Request server copy to target from src identified by key */
616 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
617 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
618 true /* is_fsctl */, (char *)pcchunk,
619 sizeof(struct copychunk_ioctl), (char **)&retbuf,
620 &ret_data_len);
621 if (rc == 0) {
622 if (ret_data_len !=
623 sizeof(struct copychunk_ioctl_rsp)) {
624 cifs_dbg(VFS, "invalid cchunk response size\n");
625 rc = -EIO;
626 goto cchunk_out;
627 }
628 if (retbuf->TotalBytesWritten == 0) {
629 cifs_dbg(FYI, "no bytes copied\n");
630 rc = -EIO;
631 goto cchunk_out;
632 }
633 /*
634 * Check if server claimed to write more than we asked
635 */
636 if (le32_to_cpu(retbuf->TotalBytesWritten) >
637 le32_to_cpu(pcchunk->Length)) {
638 cifs_dbg(VFS, "invalid copy chunk response\n");
639 rc = -EIO;
640 goto cchunk_out;
641 }
642 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
643 cifs_dbg(VFS, "invalid num chunks written\n");
644 rc = -EIO;
645 goto cchunk_out;
646 }
647 chunks_copied++;
648
649 src_off += le32_to_cpu(retbuf->TotalBytesWritten);
650 dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
651 len -= le32_to_cpu(retbuf->TotalBytesWritten);
652
653 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
654 le32_to_cpu(retbuf->ChunksWritten),
655 le32_to_cpu(retbuf->ChunkBytesWritten),
656 le32_to_cpu(retbuf->TotalBytesWritten));
657 } else if (rc == -EINVAL) {
658 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
659 goto cchunk_out;
660
661 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
662 le32_to_cpu(retbuf->ChunksWritten),
663 le32_to_cpu(retbuf->ChunkBytesWritten),
664 le32_to_cpu(retbuf->TotalBytesWritten));
665
666 /*
667 * Check if this is the first request using these sizes,
668 * (ie check if copy succeed once with original sizes
669 * and check if the server gave us different sizes after
670 * we already updated max sizes on previous request).
671 * if not then why is the server returning an error now
672 */
673 if ((chunks_copied != 0) || chunk_sizes_updated)
674 goto cchunk_out;
675
676 /* Check that server is not asking us to grow size */
677 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
678 tcon->max_bytes_chunk)
679 tcon->max_bytes_chunk =
680 le32_to_cpu(retbuf->ChunkBytesWritten);
681 else
682 goto cchunk_out; /* server gave us bogus size */
683
684 /* No need to change MaxChunks since already set to 1 */
685 chunk_sizes_updated = true;
686 }
687 }
688
689 cchunk_out:
690 kfree(pcchunk);
691 return rc;
692 }
693
694 static int
695 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
696 struct cifs_fid *fid)
697 {
698 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
699 }
700
701 static unsigned int
702 smb2_read_data_offset(char *buf)
703 {
704 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
705 return rsp->DataOffset;
706 }
707
708 static unsigned int
709 smb2_read_data_length(char *buf)
710 {
711 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
712 return le32_to_cpu(rsp->DataLength);
713 }
714
715
716 static int
717 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
718 struct cifs_io_parms *parms, unsigned int *bytes_read,
719 char **buf, int *buf_type)
720 {
721 parms->persistent_fid = pfid->persistent_fid;
722 parms->volatile_fid = pfid->volatile_fid;
723 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
724 }
725
726 static int
727 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
728 struct cifs_io_parms *parms, unsigned int *written,
729 struct kvec *iov, unsigned long nr_segs)
730 {
731
732 parms->persistent_fid = pfid->persistent_fid;
733 parms->volatile_fid = pfid->volatile_fid;
734 return SMB2_write(xid, parms, written, iov, nr_segs);
735 }
736
737 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
738 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
739 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
740 {
741 struct cifsInodeInfo *cifsi;
742 int rc;
743
744 cifsi = CIFS_I(inode);
745
746 /* if file already sparse don't bother setting sparse again */
747 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
748 return true; /* already sparse */
749
750 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
751 return true; /* already not sparse */
752
753 /*
754 * Can't check for sparse support on share the usual way via the
755 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
756 * since Samba server doesn't set the flag on the share, yet
757 * supports the set sparse FSCTL and returns sparse correctly
758 * in the file attributes. If we fail setting sparse though we
759 * mark that server does not support sparse files for this share
760 * to avoid repeatedly sending the unsupported fsctl to server
761 * if the file is repeatedly extended.
762 */
763 if (tcon->broken_sparse_sup)
764 return false;
765
766 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
767 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
768 true /* is_fctl */, &setsparse, 1, NULL, NULL);
769 if (rc) {
770 tcon->broken_sparse_sup = true;
771 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
772 return false;
773 }
774
775 if (setsparse)
776 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
777 else
778 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
779
780 return true;
781 }
782
783 static int
784 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
785 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
786 {
787 __le64 eof = cpu_to_le64(size);
788 struct inode *inode;
789
790 /*
791 * If extending file more than one page make sparse. Many Linux fs
792 * make files sparse by default when extending via ftruncate
793 */
794 inode = cfile->dentry->d_inode;
795
796 if (!set_alloc && (size > inode->i_size + 8192)) {
797 __u8 set_sparse = 1;
798
799 /* whether set sparse succeeds or not, extend the file */
800 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
801 }
802
803 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
804 cfile->fid.volatile_fid, cfile->pid, &eof, false);
805 }
806
807 static int
808 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
809 struct cifsFileInfo *cfile)
810 {
811 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
812 cfile->fid.volatile_fid);
813 }
814
815 static int
816 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
817 const char *path, struct cifs_sb_info *cifs_sb,
818 struct cifs_fid *fid, __u16 search_flags,
819 struct cifs_search_info *srch_inf)
820 {
821 __le16 *utf16_path;
822 int rc;
823 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
824 struct cifs_open_parms oparms;
825
826 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
827 if (!utf16_path)
828 return -ENOMEM;
829
830 oparms.tcon = tcon;
831 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
832 oparms.disposition = FILE_OPEN;
833 oparms.create_options = 0;
834 oparms.fid = fid;
835 oparms.reconnect = false;
836
837 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
838 kfree(utf16_path);
839 if (rc) {
840 cifs_dbg(VFS, "open dir failed\n");
841 return rc;
842 }
843
844 srch_inf->entries_in_buffer = 0;
845 srch_inf->index_of_last_entry = 0;
846
847 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
848 fid->volatile_fid, 0, srch_inf);
849 if (rc) {
850 cifs_dbg(VFS, "query directory failed\n");
851 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
852 }
853 return rc;
854 }
855
856 static int
857 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
858 struct cifs_fid *fid, __u16 search_flags,
859 struct cifs_search_info *srch_inf)
860 {
861 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
862 fid->volatile_fid, 0, srch_inf);
863 }
864
865 static int
866 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
867 struct cifs_fid *fid)
868 {
869 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
870 }
871
872 /*
873 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
874 * the number of credits and return true. Otherwise - return false.
875 */
876 static bool
877 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
878 {
879 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
880
881 if (hdr->Status != STATUS_PENDING)
882 return false;
883
884 if (!length) {
885 spin_lock(&server->req_lock);
886 server->credits += le16_to_cpu(hdr->CreditRequest);
887 spin_unlock(&server->req_lock);
888 wake_up(&server->request_q);
889 }
890
891 return true;
892 }
893
894 static int
895 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
896 struct cifsInodeInfo *cinode)
897 {
898 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
899 return SMB2_lease_break(0, tcon, cinode->lease_key,
900 smb2_get_lease_state(cinode));
901
902 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
903 fid->volatile_fid,
904 CIFS_CACHE_READ(cinode) ? 1 : 0);
905 }
906
907 static int
908 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
909 struct kstatfs *buf)
910 {
911 int rc;
912 __le16 srch_path = 0; /* Null - open root of share */
913 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
914 struct cifs_open_parms oparms;
915 struct cifs_fid fid;
916
917 oparms.tcon = tcon;
918 oparms.desired_access = FILE_READ_ATTRIBUTES;
919 oparms.disposition = FILE_OPEN;
920 oparms.create_options = 0;
921 oparms.fid = &fid;
922 oparms.reconnect = false;
923
924 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
925 if (rc)
926 return rc;
927 buf->f_type = SMB2_MAGIC_NUMBER;
928 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
929 buf);
930 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
931 return rc;
932 }
933
934 static bool
935 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
936 {
937 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
938 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
939 }
940
941 static int
942 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
943 __u64 length, __u32 type, int lock, int unlock, bool wait)
944 {
945 if (unlock && !lock)
946 type = SMB2_LOCKFLAG_UNLOCK;
947 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
948 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
949 current->tgid, length, offset, type, wait);
950 }
951
952 static void
953 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
954 {
955 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
956 }
957
958 static void
959 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
960 {
961 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
962 }
963
964 static void
965 smb2_new_lease_key(struct cifs_fid *fid)
966 {
967 get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
968 }
969
970 static int
971 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
972 const char *full_path, char **target_path,
973 struct cifs_sb_info *cifs_sb)
974 {
975 int rc;
976 __le16 *utf16_path;
977 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
978 struct cifs_open_parms oparms;
979 struct cifs_fid fid;
980 struct smb2_err_rsp *err_buf = NULL;
981 struct smb2_symlink_err_rsp *symlink;
982 unsigned int sub_len, sub_offset;
983
984 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
985
986 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
987 if (!utf16_path)
988 return -ENOMEM;
989
990 oparms.tcon = tcon;
991 oparms.desired_access = FILE_READ_ATTRIBUTES;
992 oparms.disposition = FILE_OPEN;
993 oparms.create_options = 0;
994 oparms.fid = &fid;
995 oparms.reconnect = false;
996
997 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
998
999 if (!rc || !err_buf) {
1000 kfree(utf16_path);
1001 return -ENOENT;
1002 }
1003 /* open must fail on symlink - reset rc */
1004 rc = 0;
1005 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1006 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1007 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1008 *target_path = cifs_strndup_from_utf16(
1009 (char *)symlink->PathBuffer + sub_offset,
1010 sub_len, true, cifs_sb->local_nls);
1011 if (!(*target_path)) {
1012 kfree(utf16_path);
1013 return -ENOMEM;
1014 }
1015 convert_delimiter(*target_path, '/');
1016 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1017 kfree(utf16_path);
1018 return rc;
1019 }
1020
1021 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1022 loff_t offset, loff_t len, bool keep_size)
1023 {
1024 struct inode *inode;
1025 struct cifsInodeInfo *cifsi;
1026 struct cifsFileInfo *cfile = file->private_data;
1027 struct file_zero_data_information fsctl_buf;
1028 long rc;
1029 unsigned int xid;
1030
1031 xid = get_xid();
1032
1033 inode = cfile->dentry->d_inode;
1034 cifsi = CIFS_I(inode);
1035
1036 /* if file not oplocked can't be sure whether asking to extend size */
1037 if (!CIFS_CACHE_READ(cifsi))
1038 if (keep_size == false)
1039 return -EOPNOTSUPP;
1040
1041 /*
1042 * Must check if file sparse since fallocate -z (zero range) assumes
1043 * non-sparse allocation
1044 */
1045 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1046 return -EOPNOTSUPP;
1047
1048 /*
1049 * need to make sure we are not asked to extend the file since the SMB3
1050 * fsctl does not change the file size. In the future we could change
1051 * this to zero the first part of the range then set the file size
1052 * which for a non sparse file would zero the newly extended range
1053 */
1054 if (keep_size == false)
1055 if (i_size_read(inode) < offset + len)
1056 return -EOPNOTSUPP;
1057
1058 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1059
1060 fsctl_buf.FileOffset = cpu_to_le64(offset);
1061 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1062
1063 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1064 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1065 true /* is_fctl */, (char *)&fsctl_buf,
1066 sizeof(struct file_zero_data_information), NULL, NULL);
1067 free_xid(xid);
1068 return rc;
1069 }
1070
1071 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1072 loff_t offset, loff_t len)
1073 {
1074 struct inode *inode;
1075 struct cifsInodeInfo *cifsi;
1076 struct cifsFileInfo *cfile = file->private_data;
1077 struct file_zero_data_information fsctl_buf;
1078 long rc;
1079 unsigned int xid;
1080 __u8 set_sparse = 1;
1081
1082 xid = get_xid();
1083
1084 inode = cfile->dentry->d_inode;
1085 cifsi = CIFS_I(inode);
1086
1087 /* Need to make file sparse, if not already, before freeing range. */
1088 /* Consider adding equivalent for compressed since it could also work */
1089 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1090 return -EOPNOTSUPP;
1091
1092 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1093
1094 fsctl_buf.FileOffset = cpu_to_le64(offset);
1095 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1096
1097 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1098 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1099 true /* is_fctl */, (char *)&fsctl_buf,
1100 sizeof(struct file_zero_data_information), NULL, NULL);
1101 free_xid(xid);
1102 return rc;
1103 }
1104
1105 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1106 loff_t off, loff_t len)
1107 {
1108 /* KEEP_SIZE already checked for by do_fallocate */
1109 if (mode & FALLOC_FL_PUNCH_HOLE)
1110 return smb3_punch_hole(file, tcon, off, len);
1111 else if (mode & FALLOC_FL_ZERO_RANGE) {
1112 if (mode & FALLOC_FL_KEEP_SIZE)
1113 return smb3_zero_range(file, tcon, off, len, true);
1114 return smb3_zero_range(file, tcon, off, len, false);
1115 }
1116
1117 return -EOPNOTSUPP;
1118 }
1119
1120 static void
1121 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1122 struct cifsInodeInfo *cinode, bool set_level2)
1123 {
1124 if (set_level2)
1125 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1126 0, NULL);
1127 else
1128 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1129 }
1130
1131 static void
1132 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1133 unsigned int epoch, bool *purge_cache)
1134 {
1135 oplock &= 0xFF;
1136 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1137 return;
1138 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1139 cinode->oplock = CIFS_CACHE_RHW_FLG;
1140 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1141 &cinode->vfs_inode);
1142 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1143 cinode->oplock = CIFS_CACHE_RW_FLG;
1144 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1145 &cinode->vfs_inode);
1146 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1147 cinode->oplock = CIFS_CACHE_READ_FLG;
1148 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1149 &cinode->vfs_inode);
1150 } else
1151 cinode->oplock = 0;
1152 }
1153
1154 static void
1155 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1156 unsigned int epoch, bool *purge_cache)
1157 {
1158 char message[5] = {0};
1159
1160 oplock &= 0xFF;
1161 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1162 return;
1163
1164 cinode->oplock = 0;
1165 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1166 cinode->oplock |= CIFS_CACHE_READ_FLG;
1167 strcat(message, "R");
1168 }
1169 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1170 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1171 strcat(message, "H");
1172 }
1173 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1174 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1175 strcat(message, "W");
1176 }
1177 if (!cinode->oplock)
1178 strcat(message, "None");
1179 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1180 &cinode->vfs_inode);
1181 }
1182
1183 static void
1184 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1185 unsigned int epoch, bool *purge_cache)
1186 {
1187 unsigned int old_oplock = cinode->oplock;
1188
1189 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1190
1191 if (purge_cache) {
1192 *purge_cache = false;
1193 if (old_oplock == CIFS_CACHE_READ_FLG) {
1194 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1195 (epoch - cinode->epoch > 0))
1196 *purge_cache = true;
1197 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1198 (epoch - cinode->epoch > 1))
1199 *purge_cache = true;
1200 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1201 (epoch - cinode->epoch > 1))
1202 *purge_cache = true;
1203 else if (cinode->oplock == 0 &&
1204 (epoch - cinode->epoch > 0))
1205 *purge_cache = true;
1206 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1207 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1208 (epoch - cinode->epoch > 0))
1209 *purge_cache = true;
1210 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1211 (epoch - cinode->epoch > 1))
1212 *purge_cache = true;
1213 }
1214 cinode->epoch = epoch;
1215 }
1216 }
1217
1218 static bool
1219 smb2_is_read_op(__u32 oplock)
1220 {
1221 return oplock == SMB2_OPLOCK_LEVEL_II;
1222 }
1223
1224 static bool
1225 smb21_is_read_op(__u32 oplock)
1226 {
1227 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1228 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1229 }
1230
1231 static __le32
1232 map_oplock_to_lease(u8 oplock)
1233 {
1234 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1235 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1236 else if (oplock == SMB2_OPLOCK_LEVEL_II)
1237 return SMB2_LEASE_READ_CACHING;
1238 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1239 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1240 SMB2_LEASE_WRITE_CACHING;
1241 return 0;
1242 }
1243
1244 static char *
1245 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1246 {
1247 struct create_lease *buf;
1248
1249 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1250 if (!buf)
1251 return NULL;
1252
1253 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1254 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1255 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1256
1257 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1258 (struct create_lease, lcontext));
1259 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1260 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1261 (struct create_lease, Name));
1262 buf->ccontext.NameLength = cpu_to_le16(4);
1263 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1264 buf->Name[0] = 'R';
1265 buf->Name[1] = 'q';
1266 buf->Name[2] = 'L';
1267 buf->Name[3] = 's';
1268 return (char *)buf;
1269 }
1270
1271 static char *
1272 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1273 {
1274 struct create_lease_v2 *buf;
1275
1276 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1277 if (!buf)
1278 return NULL;
1279
1280 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1281 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1282 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1283
1284 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1285 (struct create_lease_v2, lcontext));
1286 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1287 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1288 (struct create_lease_v2, Name));
1289 buf->ccontext.NameLength = cpu_to_le16(4);
1290 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1291 buf->Name[0] = 'R';
1292 buf->Name[1] = 'q';
1293 buf->Name[2] = 'L';
1294 buf->Name[3] = 's';
1295 return (char *)buf;
1296 }
1297
1298 static __u8
1299 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1300 {
1301 struct create_lease *lc = (struct create_lease *)buf;
1302
1303 *epoch = 0; /* not used */
1304 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1305 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1306 return le32_to_cpu(lc->lcontext.LeaseState);
1307 }
1308
1309 static __u8
1310 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1311 {
1312 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1313
1314 *epoch = le16_to_cpu(lc->lcontext.Epoch);
1315 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1316 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1317 return le32_to_cpu(lc->lcontext.LeaseState);
1318 }
1319
1320 static unsigned int
1321 smb2_wp_retry_size(struct inode *inode)
1322 {
1323 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1324 SMB2_MAX_BUFFER_SIZE);
1325 }
1326
1327 static bool
1328 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1329 {
1330 return !cfile->invalidHandle;
1331 }
1332
1333 struct smb_version_operations smb20_operations = {
1334 .compare_fids = smb2_compare_fids,
1335 .setup_request = smb2_setup_request,
1336 .setup_async_request = smb2_setup_async_request,
1337 .check_receive = smb2_check_receive,
1338 .add_credits = smb2_add_credits,
1339 .set_credits = smb2_set_credits,
1340 .get_credits_field = smb2_get_credits_field,
1341 .get_credits = smb2_get_credits,
1342 .wait_mtu_credits = cifs_wait_mtu_credits,
1343 .get_next_mid = smb2_get_next_mid,
1344 .read_data_offset = smb2_read_data_offset,
1345 .read_data_length = smb2_read_data_length,
1346 .map_error = map_smb2_to_linux_error,
1347 .find_mid = smb2_find_mid,
1348 .check_message = smb2_check_message,
1349 .dump_detail = smb2_dump_detail,
1350 .clear_stats = smb2_clear_stats,
1351 .print_stats = smb2_print_stats,
1352 .is_oplock_break = smb2_is_valid_oplock_break,
1353 .downgrade_oplock = smb2_downgrade_oplock,
1354 .need_neg = smb2_need_neg,
1355 .negotiate = smb2_negotiate,
1356 .negotiate_wsize = smb2_negotiate_wsize,
1357 .negotiate_rsize = smb2_negotiate_rsize,
1358 .sess_setup = SMB2_sess_setup,
1359 .logoff = SMB2_logoff,
1360 .tree_connect = SMB2_tcon,
1361 .tree_disconnect = SMB2_tdis,
1362 .qfs_tcon = smb2_qfs_tcon,
1363 .is_path_accessible = smb2_is_path_accessible,
1364 .can_echo = smb2_can_echo,
1365 .echo = SMB2_echo,
1366 .query_path_info = smb2_query_path_info,
1367 .get_srv_inum = smb2_get_srv_inum,
1368 .query_file_info = smb2_query_file_info,
1369 .set_path_size = smb2_set_path_size,
1370 .set_file_size = smb2_set_file_size,
1371 .set_file_info = smb2_set_file_info,
1372 .set_compression = smb2_set_compression,
1373 .mkdir = smb2_mkdir,
1374 .mkdir_setinfo = smb2_mkdir_setinfo,
1375 .rmdir = smb2_rmdir,
1376 .unlink = smb2_unlink,
1377 .rename = smb2_rename_path,
1378 .create_hardlink = smb2_create_hardlink,
1379 .query_symlink = smb2_query_symlink,
1380 .open = smb2_open_file,
1381 .set_fid = smb2_set_fid,
1382 .close = smb2_close_file,
1383 .flush = smb2_flush_file,
1384 .async_readv = smb2_async_readv,
1385 .async_writev = smb2_async_writev,
1386 .sync_read = smb2_sync_read,
1387 .sync_write = smb2_sync_write,
1388 .query_dir_first = smb2_query_dir_first,
1389 .query_dir_next = smb2_query_dir_next,
1390 .close_dir = smb2_close_dir,
1391 .calc_smb_size = smb2_calc_size,
1392 .is_status_pending = smb2_is_status_pending,
1393 .oplock_response = smb2_oplock_response,
1394 .queryfs = smb2_queryfs,
1395 .mand_lock = smb2_mand_lock,
1396 .mand_unlock_range = smb2_unlock_range,
1397 .push_mand_locks = smb2_push_mandatory_locks,
1398 .get_lease_key = smb2_get_lease_key,
1399 .set_lease_key = smb2_set_lease_key,
1400 .new_lease_key = smb2_new_lease_key,
1401 .calc_signature = smb2_calc_signature,
1402 .is_read_op = smb2_is_read_op,
1403 .set_oplock_level = smb2_set_oplock_level,
1404 .create_lease_buf = smb2_create_lease_buf,
1405 .parse_lease_buf = smb2_parse_lease_buf,
1406 .clone_range = smb2_clone_range,
1407 .wp_retry_size = smb2_wp_retry_size,
1408 .dir_needs_close = smb2_dir_needs_close,
1409 };
1410
1411 struct smb_version_operations smb21_operations = {
1412 .compare_fids = smb2_compare_fids,
1413 .setup_request = smb2_setup_request,
1414 .setup_async_request = smb2_setup_async_request,
1415 .check_receive = smb2_check_receive,
1416 .add_credits = smb2_add_credits,
1417 .set_credits = smb2_set_credits,
1418 .get_credits_field = smb2_get_credits_field,
1419 .get_credits = smb2_get_credits,
1420 .wait_mtu_credits = smb2_wait_mtu_credits,
1421 .get_next_mid = smb2_get_next_mid,
1422 .read_data_offset = smb2_read_data_offset,
1423 .read_data_length = smb2_read_data_length,
1424 .map_error = map_smb2_to_linux_error,
1425 .find_mid = smb2_find_mid,
1426 .check_message = smb2_check_message,
1427 .dump_detail = smb2_dump_detail,
1428 .clear_stats = smb2_clear_stats,
1429 .print_stats = smb2_print_stats,
1430 .is_oplock_break = smb2_is_valid_oplock_break,
1431 .downgrade_oplock = smb2_downgrade_oplock,
1432 .need_neg = smb2_need_neg,
1433 .negotiate = smb2_negotiate,
1434 .negotiate_wsize = smb2_negotiate_wsize,
1435 .negotiate_rsize = smb2_negotiate_rsize,
1436 .sess_setup = SMB2_sess_setup,
1437 .logoff = SMB2_logoff,
1438 .tree_connect = SMB2_tcon,
1439 .tree_disconnect = SMB2_tdis,
1440 .qfs_tcon = smb2_qfs_tcon,
1441 .is_path_accessible = smb2_is_path_accessible,
1442 .can_echo = smb2_can_echo,
1443 .echo = SMB2_echo,
1444 .query_path_info = smb2_query_path_info,
1445 .get_srv_inum = smb2_get_srv_inum,
1446 .query_file_info = smb2_query_file_info,
1447 .set_path_size = smb2_set_path_size,
1448 .set_file_size = smb2_set_file_size,
1449 .set_file_info = smb2_set_file_info,
1450 .set_compression = smb2_set_compression,
1451 .mkdir = smb2_mkdir,
1452 .mkdir_setinfo = smb2_mkdir_setinfo,
1453 .rmdir = smb2_rmdir,
1454 .unlink = smb2_unlink,
1455 .rename = smb2_rename_path,
1456 .create_hardlink = smb2_create_hardlink,
1457 .query_symlink = smb2_query_symlink,
1458 .query_mf_symlink = smb3_query_mf_symlink,
1459 .create_mf_symlink = smb3_create_mf_symlink,
1460 .open = smb2_open_file,
1461 .set_fid = smb2_set_fid,
1462 .close = smb2_close_file,
1463 .flush = smb2_flush_file,
1464 .async_readv = smb2_async_readv,
1465 .async_writev = smb2_async_writev,
1466 .sync_read = smb2_sync_read,
1467 .sync_write = smb2_sync_write,
1468 .query_dir_first = smb2_query_dir_first,
1469 .query_dir_next = smb2_query_dir_next,
1470 .close_dir = smb2_close_dir,
1471 .calc_smb_size = smb2_calc_size,
1472 .is_status_pending = smb2_is_status_pending,
1473 .oplock_response = smb2_oplock_response,
1474 .queryfs = smb2_queryfs,
1475 .mand_lock = smb2_mand_lock,
1476 .mand_unlock_range = smb2_unlock_range,
1477 .push_mand_locks = smb2_push_mandatory_locks,
1478 .get_lease_key = smb2_get_lease_key,
1479 .set_lease_key = smb2_set_lease_key,
1480 .new_lease_key = smb2_new_lease_key,
1481 .calc_signature = smb2_calc_signature,
1482 .is_read_op = smb21_is_read_op,
1483 .set_oplock_level = smb21_set_oplock_level,
1484 .create_lease_buf = smb2_create_lease_buf,
1485 .parse_lease_buf = smb2_parse_lease_buf,
1486 .clone_range = smb2_clone_range,
1487 .wp_retry_size = smb2_wp_retry_size,
1488 .dir_needs_close = smb2_dir_needs_close,
1489 };
1490
1491 struct smb_version_operations smb30_operations = {
1492 .compare_fids = smb2_compare_fids,
1493 .setup_request = smb2_setup_request,
1494 .setup_async_request = smb2_setup_async_request,
1495 .check_receive = smb2_check_receive,
1496 .add_credits = smb2_add_credits,
1497 .set_credits = smb2_set_credits,
1498 .get_credits_field = smb2_get_credits_field,
1499 .get_credits = smb2_get_credits,
1500 .wait_mtu_credits = smb2_wait_mtu_credits,
1501 .get_next_mid = smb2_get_next_mid,
1502 .read_data_offset = smb2_read_data_offset,
1503 .read_data_length = smb2_read_data_length,
1504 .map_error = map_smb2_to_linux_error,
1505 .find_mid = smb2_find_mid,
1506 .check_message = smb2_check_message,
1507 .dump_detail = smb2_dump_detail,
1508 .clear_stats = smb2_clear_stats,
1509 .print_stats = smb2_print_stats,
1510 .dump_share_caps = smb2_dump_share_caps,
1511 .is_oplock_break = smb2_is_valid_oplock_break,
1512 .downgrade_oplock = smb2_downgrade_oplock,
1513 .need_neg = smb2_need_neg,
1514 .negotiate = smb2_negotiate,
1515 .negotiate_wsize = smb2_negotiate_wsize,
1516 .negotiate_rsize = smb2_negotiate_rsize,
1517 .sess_setup = SMB2_sess_setup,
1518 .logoff = SMB2_logoff,
1519 .tree_connect = SMB2_tcon,
1520 .tree_disconnect = SMB2_tdis,
1521 .qfs_tcon = smb3_qfs_tcon,
1522 .is_path_accessible = smb2_is_path_accessible,
1523 .can_echo = smb2_can_echo,
1524 .echo = SMB2_echo,
1525 .query_path_info = smb2_query_path_info,
1526 .get_srv_inum = smb2_get_srv_inum,
1527 .query_file_info = smb2_query_file_info,
1528 .set_path_size = smb2_set_path_size,
1529 .set_file_size = smb2_set_file_size,
1530 .set_file_info = smb2_set_file_info,
1531 .set_compression = smb2_set_compression,
1532 .mkdir = smb2_mkdir,
1533 .mkdir_setinfo = smb2_mkdir_setinfo,
1534 .rmdir = smb2_rmdir,
1535 .unlink = smb2_unlink,
1536 .rename = smb2_rename_path,
1537 .create_hardlink = smb2_create_hardlink,
1538 .query_symlink = smb2_query_symlink,
1539 .query_mf_symlink = smb3_query_mf_symlink,
1540 .create_mf_symlink = smb3_create_mf_symlink,
1541 .open = smb2_open_file,
1542 .set_fid = smb2_set_fid,
1543 .close = smb2_close_file,
1544 .flush = smb2_flush_file,
1545 .async_readv = smb2_async_readv,
1546 .async_writev = smb2_async_writev,
1547 .sync_read = smb2_sync_read,
1548 .sync_write = smb2_sync_write,
1549 .query_dir_first = smb2_query_dir_first,
1550 .query_dir_next = smb2_query_dir_next,
1551 .close_dir = smb2_close_dir,
1552 .calc_smb_size = smb2_calc_size,
1553 .is_status_pending = smb2_is_status_pending,
1554 .oplock_response = smb2_oplock_response,
1555 .queryfs = smb2_queryfs,
1556 .mand_lock = smb2_mand_lock,
1557 .mand_unlock_range = smb2_unlock_range,
1558 .push_mand_locks = smb2_push_mandatory_locks,
1559 .get_lease_key = smb2_get_lease_key,
1560 .set_lease_key = smb2_set_lease_key,
1561 .new_lease_key = smb2_new_lease_key,
1562 .generate_signingkey = generate_smb3signingkey,
1563 .calc_signature = smb3_calc_signature,
1564 .is_read_op = smb21_is_read_op,
1565 .set_oplock_level = smb3_set_oplock_level,
1566 .create_lease_buf = smb3_create_lease_buf,
1567 .parse_lease_buf = smb3_parse_lease_buf,
1568 .clone_range = smb2_clone_range,
1569 .validate_negotiate = smb3_validate_negotiate,
1570 .wp_retry_size = smb2_wp_retry_size,
1571 .dir_needs_close = smb2_dir_needs_close,
1572 .fallocate = smb3_fallocate,
1573 };
1574
1575 struct smb_version_values smb20_values = {
1576 .version_string = SMB20_VERSION_STRING,
1577 .protocol_id = SMB20_PROT_ID,
1578 .req_capabilities = 0, /* MBZ */
1579 .large_lock_type = 0,
1580 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1581 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1582 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1583 .header_size = sizeof(struct smb2_hdr),
1584 .max_header_size = MAX_SMB2_HDR_SIZE,
1585 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1586 .lock_cmd = SMB2_LOCK,
1587 .cap_unix = 0,
1588 .cap_nt_find = SMB2_NT_FIND,
1589 .cap_large_files = SMB2_LARGE_FILES,
1590 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1591 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1592 .create_lease_size = sizeof(struct create_lease),
1593 };
1594
1595 struct smb_version_values smb21_values = {
1596 .version_string = SMB21_VERSION_STRING,
1597 .protocol_id = SMB21_PROT_ID,
1598 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1599 .large_lock_type = 0,
1600 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1601 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1602 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1603 .header_size = sizeof(struct smb2_hdr),
1604 .max_header_size = MAX_SMB2_HDR_SIZE,
1605 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1606 .lock_cmd = SMB2_LOCK,
1607 .cap_unix = 0,
1608 .cap_nt_find = SMB2_NT_FIND,
1609 .cap_large_files = SMB2_LARGE_FILES,
1610 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1611 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1612 .create_lease_size = sizeof(struct create_lease),
1613 };
1614
1615 struct smb_version_values smb30_values = {
1616 .version_string = SMB30_VERSION_STRING,
1617 .protocol_id = SMB30_PROT_ID,
1618 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1619 .large_lock_type = 0,
1620 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1621 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1622 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1623 .header_size = sizeof(struct smb2_hdr),
1624 .max_header_size = MAX_SMB2_HDR_SIZE,
1625 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1626 .lock_cmd = SMB2_LOCK,
1627 .cap_unix = 0,
1628 .cap_nt_find = SMB2_NT_FIND,
1629 .cap_large_files = SMB2_LARGE_FILES,
1630 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1631 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1632 .create_lease_size = sizeof(struct create_lease_v2),
1633 };
1634
1635 struct smb_version_values smb302_values = {
1636 .version_string = SMB302_VERSION_STRING,
1637 .protocol_id = SMB302_PROT_ID,
1638 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1639 .large_lock_type = 0,
1640 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1641 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1642 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1643 .header_size = sizeof(struct smb2_hdr),
1644 .max_header_size = MAX_SMB2_HDR_SIZE,
1645 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1646 .lock_cmd = SMB2_LOCK,
1647 .cap_unix = 0,
1648 .cap_nt_find = SMB2_NT_FIND,
1649 .cap_large_files = SMB2_LARGE_FILES,
1650 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1651 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1652 .create_lease_size = sizeof(struct create_lease_v2),
1653 };
(deprecated) Btrfs devel tree