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CIFS: Fix wrong filename length for SMB2
[mirror_ubuntu-zesty-kernel.git] / fs / cifs / smb2ops.c
1 /*
2 * SMB2 version specific operations
3 *
4 * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
5 *
6 * This library is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published
8 * by the Free Software Foundation.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include <linux/pagemap.h>
21 #include <linux/vfs.h>
22 #include <linux/falloc.h>
23 #include "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
269 if ((rc == 0) && (ret_data_len > 0)) {
270 /* Dump info on first interface */
271 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
272 le32_to_cpu(out_buf->Capability));
273 cifs_dbg(FYI, "Link Speed %lld\n",
274 le64_to_cpu(out_buf->LinkSpeed));
275 } else
276 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
277
278 return rc;
279 }
280 #endif /* STATS2 */
281
282 static void
283 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
284 {
285 int rc;
286 __le16 srch_path = 0; /* Null - open root of share */
287 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
288 struct cifs_open_parms oparms;
289 struct cifs_fid fid;
290
291 oparms.tcon = tcon;
292 oparms.desired_access = FILE_READ_ATTRIBUTES;
293 oparms.disposition = FILE_OPEN;
294 oparms.create_options = 0;
295 oparms.fid = &fid;
296 oparms.reconnect = false;
297
298 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
299 if (rc)
300 return;
301
302 #ifdef CONFIG_CIFS_STATS2
303 SMB3_request_interfaces(xid, tcon);
304 #endif /* STATS2 */
305
306 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
307 FS_ATTRIBUTE_INFORMATION);
308 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
309 FS_DEVICE_INFORMATION);
310 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
311 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
312 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
313 return;
314 }
315
316 static void
317 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
318 {
319 int rc;
320 __le16 srch_path = 0; /* Null - open root of share */
321 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
322 struct cifs_open_parms oparms;
323 struct cifs_fid fid;
324
325 oparms.tcon = tcon;
326 oparms.desired_access = FILE_READ_ATTRIBUTES;
327 oparms.disposition = FILE_OPEN;
328 oparms.create_options = 0;
329 oparms.fid = &fid;
330 oparms.reconnect = false;
331
332 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
333 if (rc)
334 return;
335
336 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
337 FS_ATTRIBUTE_INFORMATION);
338 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
339 FS_DEVICE_INFORMATION);
340 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
341 return;
342 }
343
344 static int
345 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
346 struct cifs_sb_info *cifs_sb, const char *full_path)
347 {
348 int rc;
349 __le16 *utf16_path;
350 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
351 struct cifs_open_parms oparms;
352 struct cifs_fid fid;
353
354 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
355 if (!utf16_path)
356 return -ENOMEM;
357
358 oparms.tcon = tcon;
359 oparms.desired_access = FILE_READ_ATTRIBUTES;
360 oparms.disposition = FILE_OPEN;
361 oparms.create_options = 0;
362 oparms.fid = &fid;
363 oparms.reconnect = false;
364
365 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
366 if (rc) {
367 kfree(utf16_path);
368 return rc;
369 }
370
371 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
372 kfree(utf16_path);
373 return rc;
374 }
375
376 static int
377 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
378 struct cifs_sb_info *cifs_sb, const char *full_path,
379 u64 *uniqueid, FILE_ALL_INFO *data)
380 {
381 *uniqueid = le64_to_cpu(data->IndexNumber);
382 return 0;
383 }
384
385 static int
386 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
387 struct cifs_fid *fid, FILE_ALL_INFO *data)
388 {
389 int rc;
390 struct smb2_file_all_info *smb2_data;
391
392 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
393 GFP_KERNEL);
394 if (smb2_data == NULL)
395 return -ENOMEM;
396
397 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
398 smb2_data);
399 if (!rc)
400 move_smb2_info_to_cifs(data, smb2_data);
401 kfree(smb2_data);
402 return rc;
403 }
404
405 static bool
406 smb2_can_echo(struct TCP_Server_Info *server)
407 {
408 return server->echoes;
409 }
410
411 static void
412 smb2_clear_stats(struct cifs_tcon *tcon)
413 {
414 #ifdef CONFIG_CIFS_STATS
415 int i;
416 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
417 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
418 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
419 }
420 #endif
421 }
422
423 static void
424 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
425 {
426 seq_puts(m, "\n\tShare Capabilities:");
427 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
428 seq_puts(m, " DFS,");
429 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
430 seq_puts(m, " CONTINUOUS AVAILABILITY,");
431 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
432 seq_puts(m, " SCALEOUT,");
433 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
434 seq_puts(m, " CLUSTER,");
435 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
436 seq_puts(m, " ASYMMETRIC,");
437 if (tcon->capabilities == 0)
438 seq_puts(m, " None");
439 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
440 seq_puts(m, " Aligned,");
441 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
442 seq_puts(m, " Partition Aligned,");
443 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
444 seq_puts(m, " SSD,");
445 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
446 seq_puts(m, " TRIM-support,");
447
448 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
449 if (tcon->perf_sector_size)
450 seq_printf(m, "\tOptimal sector size: 0x%x",
451 tcon->perf_sector_size);
452 }
453
454 static void
455 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
456 {
457 #ifdef CONFIG_CIFS_STATS
458 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
459 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
460 seq_printf(m, "\nNegotiates: %d sent %d failed",
461 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
462 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
463 seq_printf(m, "\nSessionSetups: %d sent %d failed",
464 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
465 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
466 seq_printf(m, "\nLogoffs: %d sent %d failed",
467 atomic_read(&sent[SMB2_LOGOFF_HE]),
468 atomic_read(&failed[SMB2_LOGOFF_HE]));
469 seq_printf(m, "\nTreeConnects: %d sent %d failed",
470 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
471 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
472 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
473 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
474 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
475 seq_printf(m, "\nCreates: %d sent %d failed",
476 atomic_read(&sent[SMB2_CREATE_HE]),
477 atomic_read(&failed[SMB2_CREATE_HE]));
478 seq_printf(m, "\nCloses: %d sent %d failed",
479 atomic_read(&sent[SMB2_CLOSE_HE]),
480 atomic_read(&failed[SMB2_CLOSE_HE]));
481 seq_printf(m, "\nFlushes: %d sent %d failed",
482 atomic_read(&sent[SMB2_FLUSH_HE]),
483 atomic_read(&failed[SMB2_FLUSH_HE]));
484 seq_printf(m, "\nReads: %d sent %d failed",
485 atomic_read(&sent[SMB2_READ_HE]),
486 atomic_read(&failed[SMB2_READ_HE]));
487 seq_printf(m, "\nWrites: %d sent %d failed",
488 atomic_read(&sent[SMB2_WRITE_HE]),
489 atomic_read(&failed[SMB2_WRITE_HE]));
490 seq_printf(m, "\nLocks: %d sent %d failed",
491 atomic_read(&sent[SMB2_LOCK_HE]),
492 atomic_read(&failed[SMB2_LOCK_HE]));
493 seq_printf(m, "\nIOCTLs: %d sent %d failed",
494 atomic_read(&sent[SMB2_IOCTL_HE]),
495 atomic_read(&failed[SMB2_IOCTL_HE]));
496 seq_printf(m, "\nCancels: %d sent %d failed",
497 atomic_read(&sent[SMB2_CANCEL_HE]),
498 atomic_read(&failed[SMB2_CANCEL_HE]));
499 seq_printf(m, "\nEchos: %d sent %d failed",
500 atomic_read(&sent[SMB2_ECHO_HE]),
501 atomic_read(&failed[SMB2_ECHO_HE]));
502 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
503 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
504 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
505 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
506 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
507 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
508 seq_printf(m, "\nQueryInfos: %d sent %d failed",
509 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
510 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
511 seq_printf(m, "\nSetInfos: %d sent %d failed",
512 atomic_read(&sent[SMB2_SET_INFO_HE]),
513 atomic_read(&failed[SMB2_SET_INFO_HE]));
514 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
515 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
516 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
517 #endif
518 }
519
520 static void
521 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
522 {
523 struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
524 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
525
526 cfile->fid.persistent_fid = fid->persistent_fid;
527 cfile->fid.volatile_fid = fid->volatile_fid;
528 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
529 &fid->purge_cache);
530 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
531 }
532
533 static void
534 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
535 struct cifs_fid *fid)
536 {
537 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
538 }
539
540 static int
541 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
542 u64 persistent_fid, u64 volatile_fid,
543 struct copychunk_ioctl *pcchunk)
544 {
545 int rc;
546 unsigned int ret_data_len;
547 struct resume_key_req *res_key;
548
549 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
550 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
551 NULL, 0 /* no input */,
552 (char **)&res_key, &ret_data_len);
553
554 if (rc) {
555 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
556 goto req_res_key_exit;
557 }
558 if (ret_data_len < sizeof(struct resume_key_req)) {
559 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
560 rc = -EINVAL;
561 goto req_res_key_exit;
562 }
563 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
564
565 req_res_key_exit:
566 kfree(res_key);
567 return rc;
568 }
569
570 static int
571 smb2_clone_range(const unsigned int xid,
572 struct cifsFileInfo *srcfile,
573 struct cifsFileInfo *trgtfile, u64 src_off,
574 u64 len, u64 dest_off)
575 {
576 int rc;
577 unsigned int ret_data_len;
578 struct copychunk_ioctl *pcchunk;
579 struct copychunk_ioctl_rsp *retbuf = NULL;
580 struct cifs_tcon *tcon;
581 int chunks_copied = 0;
582 bool chunk_sizes_updated = false;
583
584 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
585
586 if (pcchunk == NULL)
587 return -ENOMEM;
588
589 cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
590 /* Request a key from the server to identify the source of the copy */
591 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
592 srcfile->fid.persistent_fid,
593 srcfile->fid.volatile_fid, pcchunk);
594
595 /* Note: request_res_key sets res_key null only if rc !=0 */
596 if (rc)
597 goto cchunk_out;
598
599 /* For now array only one chunk long, will make more flexible later */
600 pcchunk->ChunkCount = __constant_cpu_to_le32(1);
601 pcchunk->Reserved = 0;
602 pcchunk->Reserved2 = 0;
603
604 tcon = tlink_tcon(trgtfile->tlink);
605
606 while (len > 0) {
607 pcchunk->SourceOffset = cpu_to_le64(src_off);
608 pcchunk->TargetOffset = cpu_to_le64(dest_off);
609 pcchunk->Length =
610 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
611
612 /* Request server copy to target from src identified by key */
613 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
614 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
615 true /* is_fsctl */, (char *)pcchunk,
616 sizeof(struct copychunk_ioctl), (char **)&retbuf,
617 &ret_data_len);
618 if (rc == 0) {
619 if (ret_data_len !=
620 sizeof(struct copychunk_ioctl_rsp)) {
621 cifs_dbg(VFS, "invalid cchunk response size\n");
622 rc = -EIO;
623 goto cchunk_out;
624 }
625 if (retbuf->TotalBytesWritten == 0) {
626 cifs_dbg(FYI, "no bytes copied\n");
627 rc = -EIO;
628 goto cchunk_out;
629 }
630 /*
631 * Check if server claimed to write more than we asked
632 */
633 if (le32_to_cpu(retbuf->TotalBytesWritten) >
634 le32_to_cpu(pcchunk->Length)) {
635 cifs_dbg(VFS, "invalid copy chunk response\n");
636 rc = -EIO;
637 goto cchunk_out;
638 }
639 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
640 cifs_dbg(VFS, "invalid num chunks written\n");
641 rc = -EIO;
642 goto cchunk_out;
643 }
644 chunks_copied++;
645
646 src_off += le32_to_cpu(retbuf->TotalBytesWritten);
647 dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
648 len -= le32_to_cpu(retbuf->TotalBytesWritten);
649
650 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
651 le32_to_cpu(retbuf->ChunksWritten),
652 le32_to_cpu(retbuf->ChunkBytesWritten),
653 le32_to_cpu(retbuf->TotalBytesWritten));
654 } else if (rc == -EINVAL) {
655 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
656 goto cchunk_out;
657
658 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
659 le32_to_cpu(retbuf->ChunksWritten),
660 le32_to_cpu(retbuf->ChunkBytesWritten),
661 le32_to_cpu(retbuf->TotalBytesWritten));
662
663 /*
664 * Check if this is the first request using these sizes,
665 * (ie check if copy succeed once with original sizes
666 * and check if the server gave us different sizes after
667 * we already updated max sizes on previous request).
668 * if not then why is the server returning an error now
669 */
670 if ((chunks_copied != 0) || chunk_sizes_updated)
671 goto cchunk_out;
672
673 /* Check that server is not asking us to grow size */
674 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
675 tcon->max_bytes_chunk)
676 tcon->max_bytes_chunk =
677 le32_to_cpu(retbuf->ChunkBytesWritten);
678 else
679 goto cchunk_out; /* server gave us bogus size */
680
681 /* No need to change MaxChunks since already set to 1 */
682 chunk_sizes_updated = true;
683 }
684 }
685
686 cchunk_out:
687 kfree(pcchunk);
688 return rc;
689 }
690
691 static int
692 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
693 struct cifs_fid *fid)
694 {
695 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
696 }
697
698 static unsigned int
699 smb2_read_data_offset(char *buf)
700 {
701 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
702 return rsp->DataOffset;
703 }
704
705 static unsigned int
706 smb2_read_data_length(char *buf)
707 {
708 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
709 return le32_to_cpu(rsp->DataLength);
710 }
711
712
713 static int
714 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
715 struct cifs_io_parms *parms, unsigned int *bytes_read,
716 char **buf, int *buf_type)
717 {
718 parms->persistent_fid = cfile->fid.persistent_fid;
719 parms->volatile_fid = cfile->fid.volatile_fid;
720 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
721 }
722
723 static int
724 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
725 struct cifs_io_parms *parms, unsigned int *written,
726 struct kvec *iov, unsigned long nr_segs)
727 {
728
729 parms->persistent_fid = cfile->fid.persistent_fid;
730 parms->volatile_fid = cfile->fid.volatile_fid;
731 return SMB2_write(xid, parms, written, iov, nr_segs);
732 }
733
734 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
735 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
736 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
737 {
738 struct cifsInodeInfo *cifsi;
739 int rc;
740
741 cifsi = CIFS_I(inode);
742
743 /* if file already sparse don't bother setting sparse again */
744 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
745 return true; /* already sparse */
746
747 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
748 return true; /* already not sparse */
749
750 /*
751 * Can't check for sparse support on share the usual way via the
752 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
753 * since Samba server doesn't set the flag on the share, yet
754 * supports the set sparse FSCTL and returns sparse correctly
755 * in the file attributes. If we fail setting sparse though we
756 * mark that server does not support sparse files for this share
757 * to avoid repeatedly sending the unsupported fsctl to server
758 * if the file is repeatedly extended.
759 */
760 if (tcon->broken_sparse_sup)
761 return false;
762
763 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
764 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
765 true /* is_fctl */, &setsparse, 1, NULL, NULL);
766 if (rc) {
767 tcon->broken_sparse_sup = true;
768 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
769 return false;
770 }
771
772 if (setsparse)
773 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
774 else
775 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
776
777 return true;
778 }
779
780 static int
781 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
782 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
783 {
784 __le64 eof = cpu_to_le64(size);
785 struct inode *inode;
786
787 /*
788 * If extending file more than one page make sparse. Many Linux fs
789 * make files sparse by default when extending via ftruncate
790 */
791 inode = cfile->dentry->d_inode;
792
793 if (!set_alloc && (size > inode->i_size + 8192)) {
794 __u8 set_sparse = 1;
795
796 /* whether set sparse succeeds or not, extend the file */
797 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
798 }
799
800 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
801 cfile->fid.volatile_fid, cfile->pid, &eof, false);
802 }
803
804 static int
805 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
806 struct cifsFileInfo *cfile)
807 {
808 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
809 cfile->fid.volatile_fid);
810 }
811
812 static int
813 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
814 const char *path, struct cifs_sb_info *cifs_sb,
815 struct cifs_fid *fid, __u16 search_flags,
816 struct cifs_search_info *srch_inf)
817 {
818 __le16 *utf16_path;
819 int rc;
820 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
821 struct cifs_open_parms oparms;
822
823 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
824 if (!utf16_path)
825 return -ENOMEM;
826
827 oparms.tcon = tcon;
828 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
829 oparms.disposition = FILE_OPEN;
830 oparms.create_options = 0;
831 oparms.fid = fid;
832 oparms.reconnect = false;
833
834 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
835 kfree(utf16_path);
836 if (rc) {
837 cifs_dbg(VFS, "open dir failed\n");
838 return rc;
839 }
840
841 srch_inf->entries_in_buffer = 0;
842 srch_inf->index_of_last_entry = 0;
843
844 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
845 fid->volatile_fid, 0, srch_inf);
846 if (rc) {
847 cifs_dbg(VFS, "query directory failed\n");
848 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
849 }
850 return rc;
851 }
852
853 static int
854 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
855 struct cifs_fid *fid, __u16 search_flags,
856 struct cifs_search_info *srch_inf)
857 {
858 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
859 fid->volatile_fid, 0, srch_inf);
860 }
861
862 static int
863 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
864 struct cifs_fid *fid)
865 {
866 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
867 }
868
869 /*
870 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
871 * the number of credits and return true. Otherwise - return false.
872 */
873 static bool
874 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
875 {
876 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
877
878 if (hdr->Status != STATUS_PENDING)
879 return false;
880
881 if (!length) {
882 spin_lock(&server->req_lock);
883 server->credits += le16_to_cpu(hdr->CreditRequest);
884 spin_unlock(&server->req_lock);
885 wake_up(&server->request_q);
886 }
887
888 return true;
889 }
890
891 static int
892 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
893 struct cifsInodeInfo *cinode)
894 {
895 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
896 return SMB2_lease_break(0, tcon, cinode->lease_key,
897 smb2_get_lease_state(cinode));
898
899 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
900 fid->volatile_fid,
901 CIFS_CACHE_READ(cinode) ? 1 : 0);
902 }
903
904 static int
905 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
906 struct kstatfs *buf)
907 {
908 int rc;
909 __le16 srch_path = 0; /* Null - open root of share */
910 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
911 struct cifs_open_parms oparms;
912 struct cifs_fid fid;
913
914 oparms.tcon = tcon;
915 oparms.desired_access = FILE_READ_ATTRIBUTES;
916 oparms.disposition = FILE_OPEN;
917 oparms.create_options = 0;
918 oparms.fid = &fid;
919 oparms.reconnect = false;
920
921 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
922 if (rc)
923 return rc;
924 buf->f_type = SMB2_MAGIC_NUMBER;
925 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
926 buf);
927 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
928 return rc;
929 }
930
931 static bool
932 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
933 {
934 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
935 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
936 }
937
938 static int
939 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
940 __u64 length, __u32 type, int lock, int unlock, bool wait)
941 {
942 if (unlock && !lock)
943 type = SMB2_LOCKFLAG_UNLOCK;
944 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
945 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
946 current->tgid, length, offset, type, wait);
947 }
948
949 static void
950 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
951 {
952 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
953 }
954
955 static void
956 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
957 {
958 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
959 }
960
961 static void
962 smb2_new_lease_key(struct cifs_fid *fid)
963 {
964 get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
965 }
966
967 static int
968 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
969 const char *full_path, char **target_path,
970 struct cifs_sb_info *cifs_sb)
971 {
972 int rc;
973 __le16 *utf16_path;
974 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
975 struct cifs_open_parms oparms;
976 struct cifs_fid fid;
977 struct smb2_err_rsp *err_buf = NULL;
978 struct smb2_symlink_err_rsp *symlink;
979 unsigned int sub_len, sub_offset;
980
981 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
982
983 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
984 if (!utf16_path)
985 return -ENOMEM;
986
987 oparms.tcon = tcon;
988 oparms.desired_access = FILE_READ_ATTRIBUTES;
989 oparms.disposition = FILE_OPEN;
990 oparms.create_options = 0;
991 oparms.fid = &fid;
992 oparms.reconnect = false;
993
994 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
995
996 if (!rc || !err_buf) {
997 kfree(utf16_path);
998 return -ENOENT;
999 }
1000 /* open must fail on symlink - reset rc */
1001 rc = 0;
1002 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1003 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1004 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1005 *target_path = cifs_strndup_from_utf16(
1006 (char *)symlink->PathBuffer + sub_offset,
1007 sub_len, true, cifs_sb->local_nls);
1008 if (!(*target_path)) {
1009 kfree(utf16_path);
1010 return -ENOMEM;
1011 }
1012 convert_delimiter(*target_path, '/');
1013 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1014 kfree(utf16_path);
1015 return rc;
1016 }
1017
1018 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1019 loff_t offset, loff_t len, bool keep_size)
1020 {
1021 struct inode *inode;
1022 struct cifsInodeInfo *cifsi;
1023 struct cifsFileInfo *cfile = file->private_data;
1024 struct file_zero_data_information fsctl_buf;
1025 long rc;
1026 unsigned int xid;
1027
1028 xid = get_xid();
1029
1030 inode = cfile->dentry->d_inode;
1031 cifsi = CIFS_I(inode);
1032
1033 /* if file not oplocked can't be sure whether asking to extend size */
1034 if (!CIFS_CACHE_READ(cifsi))
1035 if (keep_size == false)
1036 return -EOPNOTSUPP;
1037
1038 /*
1039 * Must check if file sparse since fallocate -z (zero range) assumes
1040 * non-sparse allocation
1041 */
1042 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1043 return -EOPNOTSUPP;
1044
1045 /*
1046 * need to make sure we are not asked to extend the file since the SMB3
1047 * fsctl does not change the file size. In the future we could change
1048 * this to zero the first part of the range then set the file size
1049 * which for a non sparse file would zero the newly extended range
1050 */
1051 if (keep_size == false)
1052 if (i_size_read(inode) < offset + len)
1053 return -EOPNOTSUPP;
1054
1055 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1056
1057 fsctl_buf.FileOffset = cpu_to_le64(offset);
1058 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1059
1060 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1061 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1062 true /* is_fctl */, (char *)&fsctl_buf,
1063 sizeof(struct file_zero_data_information), NULL, NULL);
1064 free_xid(xid);
1065 return rc;
1066 }
1067
1068 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1069 loff_t offset, loff_t len)
1070 {
1071 struct inode *inode;
1072 struct cifsInodeInfo *cifsi;
1073 struct cifsFileInfo *cfile = file->private_data;
1074 struct file_zero_data_information fsctl_buf;
1075 long rc;
1076 unsigned int xid;
1077 __u8 set_sparse = 1;
1078
1079 xid = get_xid();
1080
1081 inode = cfile->dentry->d_inode;
1082 cifsi = CIFS_I(inode);
1083
1084 /* Need to make file sparse, if not already, before freeing range. */
1085 /* Consider adding equivalent for compressed since it could also work */
1086 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1087 return -EOPNOTSUPP;
1088
1089 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1090
1091 fsctl_buf.FileOffset = cpu_to_le64(offset);
1092 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1093
1094 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1095 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1096 true /* is_fctl */, (char *)&fsctl_buf,
1097 sizeof(struct file_zero_data_information), NULL, NULL);
1098 free_xid(xid);
1099 return rc;
1100 }
1101
1102 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1103 loff_t off, loff_t len)
1104 {
1105 /* KEEP_SIZE already checked for by do_fallocate */
1106 if (mode & FALLOC_FL_PUNCH_HOLE)
1107 return smb3_punch_hole(file, tcon, off, len);
1108 else if (mode & FALLOC_FL_ZERO_RANGE) {
1109 if (mode & FALLOC_FL_KEEP_SIZE)
1110 return smb3_zero_range(file, tcon, off, len, true);
1111 return smb3_zero_range(file, tcon, off, len, false);
1112 }
1113
1114 return -EOPNOTSUPP;
1115 }
1116
1117 static void
1118 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1119 struct cifsInodeInfo *cinode, bool set_level2)
1120 {
1121 if (set_level2)
1122 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1123 0, NULL);
1124 else
1125 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1126 }
1127
1128 static void
1129 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1130 unsigned int epoch, bool *purge_cache)
1131 {
1132 oplock &= 0xFF;
1133 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1134 return;
1135 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1136 cinode->oplock = CIFS_CACHE_RHW_FLG;
1137 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1138 &cinode->vfs_inode);
1139 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1140 cinode->oplock = CIFS_CACHE_RW_FLG;
1141 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1142 &cinode->vfs_inode);
1143 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1144 cinode->oplock = CIFS_CACHE_READ_FLG;
1145 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1146 &cinode->vfs_inode);
1147 } else
1148 cinode->oplock = 0;
1149 }
1150
1151 static void
1152 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1153 unsigned int epoch, bool *purge_cache)
1154 {
1155 char message[5] = {0};
1156
1157 oplock &= 0xFF;
1158 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1159 return;
1160
1161 cinode->oplock = 0;
1162 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1163 cinode->oplock |= CIFS_CACHE_READ_FLG;
1164 strcat(message, "R");
1165 }
1166 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1167 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
1168 strcat(message, "H");
1169 }
1170 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1171 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
1172 strcat(message, "W");
1173 }
1174 if (!cinode->oplock)
1175 strcat(message, "None");
1176 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1177 &cinode->vfs_inode);
1178 }
1179
1180 static void
1181 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1182 unsigned int epoch, bool *purge_cache)
1183 {
1184 unsigned int old_oplock = cinode->oplock;
1185
1186 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1187
1188 if (purge_cache) {
1189 *purge_cache = false;
1190 if (old_oplock == CIFS_CACHE_READ_FLG) {
1191 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1192 (epoch - cinode->epoch > 0))
1193 *purge_cache = true;
1194 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1195 (epoch - cinode->epoch > 1))
1196 *purge_cache = true;
1197 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1198 (epoch - cinode->epoch > 1))
1199 *purge_cache = true;
1200 else if (cinode->oplock == 0 &&
1201 (epoch - cinode->epoch > 0))
1202 *purge_cache = true;
1203 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1204 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1205 (epoch - cinode->epoch > 0))
1206 *purge_cache = true;
1207 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1208 (epoch - cinode->epoch > 1))
1209 *purge_cache = true;
1210 }
1211 cinode->epoch = epoch;
1212 }
1213 }
1214
1215 static bool
1216 smb2_is_read_op(__u32 oplock)
1217 {
1218 return oplock == SMB2_OPLOCK_LEVEL_II;
1219 }
1220
1221 static bool
1222 smb21_is_read_op(__u32 oplock)
1223 {
1224 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1225 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1226 }
1227
1228 static __le32
1229 map_oplock_to_lease(u8 oplock)
1230 {
1231 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1232 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1233 else if (oplock == SMB2_OPLOCK_LEVEL_II)
1234 return SMB2_LEASE_READ_CACHING;
1235 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1236 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1237 SMB2_LEASE_WRITE_CACHING;
1238 return 0;
1239 }
1240
1241 static char *
1242 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1243 {
1244 struct create_lease *buf;
1245
1246 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1247 if (!buf)
1248 return NULL;
1249
1250 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1251 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1252 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1253
1254 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1255 (struct create_lease, lcontext));
1256 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1257 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1258 (struct create_lease, Name));
1259 buf->ccontext.NameLength = cpu_to_le16(4);
1260 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1261 buf->Name[0] = 'R';
1262 buf->Name[1] = 'q';
1263 buf->Name[2] = 'L';
1264 buf->Name[3] = 's';
1265 return (char *)buf;
1266 }
1267
1268 static char *
1269 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1270 {
1271 struct create_lease_v2 *buf;
1272
1273 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1274 if (!buf)
1275 return NULL;
1276
1277 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1278 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1279 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1280
1281 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1282 (struct create_lease_v2, lcontext));
1283 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1284 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1285 (struct create_lease_v2, Name));
1286 buf->ccontext.NameLength = cpu_to_le16(4);
1287 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1288 buf->Name[0] = 'R';
1289 buf->Name[1] = 'q';
1290 buf->Name[2] = 'L';
1291 buf->Name[3] = 's';
1292 return (char *)buf;
1293 }
1294
1295 static __u8
1296 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1297 {
1298 struct create_lease *lc = (struct create_lease *)buf;
1299
1300 *epoch = 0; /* not used */
1301 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1302 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1303 return le32_to_cpu(lc->lcontext.LeaseState);
1304 }
1305
1306 static __u8
1307 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1308 {
1309 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1310
1311 *epoch = le16_to_cpu(lc->lcontext.Epoch);
1312 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1313 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1314 return le32_to_cpu(lc->lcontext.LeaseState);
1315 }
1316
1317 static unsigned int
1318 smb2_wp_retry_size(struct inode *inode)
1319 {
1320 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1321 SMB2_MAX_BUFFER_SIZE);
1322 }
1323
1324 static bool
1325 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1326 {
1327 return !cfile->invalidHandle;
1328 }
1329
1330 struct smb_version_operations smb20_operations = {
1331 .compare_fids = smb2_compare_fids,
1332 .setup_request = smb2_setup_request,
1333 .setup_async_request = smb2_setup_async_request,
1334 .check_receive = smb2_check_receive,
1335 .add_credits = smb2_add_credits,
1336 .set_credits = smb2_set_credits,
1337 .get_credits_field = smb2_get_credits_field,
1338 .get_credits = smb2_get_credits,
1339 .wait_mtu_credits = cifs_wait_mtu_credits,
1340 .get_next_mid = smb2_get_next_mid,
1341 .read_data_offset = smb2_read_data_offset,
1342 .read_data_length = smb2_read_data_length,
1343 .map_error = map_smb2_to_linux_error,
1344 .find_mid = smb2_find_mid,
1345 .check_message = smb2_check_message,
1346 .dump_detail = smb2_dump_detail,
1347 .clear_stats = smb2_clear_stats,
1348 .print_stats = smb2_print_stats,
1349 .is_oplock_break = smb2_is_valid_oplock_break,
1350 .downgrade_oplock = smb2_downgrade_oplock,
1351 .need_neg = smb2_need_neg,
1352 .negotiate = smb2_negotiate,
1353 .negotiate_wsize = smb2_negotiate_wsize,
1354 .negotiate_rsize = smb2_negotiate_rsize,
1355 .sess_setup = SMB2_sess_setup,
1356 .logoff = SMB2_logoff,
1357 .tree_connect = SMB2_tcon,
1358 .tree_disconnect = SMB2_tdis,
1359 .qfs_tcon = smb2_qfs_tcon,
1360 .is_path_accessible = smb2_is_path_accessible,
1361 .can_echo = smb2_can_echo,
1362 .echo = SMB2_echo,
1363 .query_path_info = smb2_query_path_info,
1364 .get_srv_inum = smb2_get_srv_inum,
1365 .query_file_info = smb2_query_file_info,
1366 .set_path_size = smb2_set_path_size,
1367 .set_file_size = smb2_set_file_size,
1368 .set_file_info = smb2_set_file_info,
1369 .set_compression = smb2_set_compression,
1370 .mkdir = smb2_mkdir,
1371 .mkdir_setinfo = smb2_mkdir_setinfo,
1372 .rmdir = smb2_rmdir,
1373 .unlink = smb2_unlink,
1374 .rename = smb2_rename_path,
1375 .create_hardlink = smb2_create_hardlink,
1376 .query_symlink = smb2_query_symlink,
1377 .open = smb2_open_file,
1378 .set_fid = smb2_set_fid,
1379 .close = smb2_close_file,
1380 .flush = smb2_flush_file,
1381 .async_readv = smb2_async_readv,
1382 .async_writev = smb2_async_writev,
1383 .sync_read = smb2_sync_read,
1384 .sync_write = smb2_sync_write,
1385 .query_dir_first = smb2_query_dir_first,
1386 .query_dir_next = smb2_query_dir_next,
1387 .close_dir = smb2_close_dir,
1388 .calc_smb_size = smb2_calc_size,
1389 .is_status_pending = smb2_is_status_pending,
1390 .oplock_response = smb2_oplock_response,
1391 .queryfs = smb2_queryfs,
1392 .mand_lock = smb2_mand_lock,
1393 .mand_unlock_range = smb2_unlock_range,
1394 .push_mand_locks = smb2_push_mandatory_locks,
1395 .get_lease_key = smb2_get_lease_key,
1396 .set_lease_key = smb2_set_lease_key,
1397 .new_lease_key = smb2_new_lease_key,
1398 .calc_signature = smb2_calc_signature,
1399 .is_read_op = smb2_is_read_op,
1400 .set_oplock_level = smb2_set_oplock_level,
1401 .create_lease_buf = smb2_create_lease_buf,
1402 .parse_lease_buf = smb2_parse_lease_buf,
1403 .clone_range = smb2_clone_range,
1404 .wp_retry_size = smb2_wp_retry_size,
1405 .dir_needs_close = smb2_dir_needs_close,
1406 };
1407
1408 struct smb_version_operations smb21_operations = {
1409 .compare_fids = smb2_compare_fids,
1410 .setup_request = smb2_setup_request,
1411 .setup_async_request = smb2_setup_async_request,
1412 .check_receive = smb2_check_receive,
1413 .add_credits = smb2_add_credits,
1414 .set_credits = smb2_set_credits,
1415 .get_credits_field = smb2_get_credits_field,
1416 .get_credits = smb2_get_credits,
1417 .wait_mtu_credits = smb2_wait_mtu_credits,
1418 .get_next_mid = smb2_get_next_mid,
1419 .read_data_offset = smb2_read_data_offset,
1420 .read_data_length = smb2_read_data_length,
1421 .map_error = map_smb2_to_linux_error,
1422 .find_mid = smb2_find_mid,
1423 .check_message = smb2_check_message,
1424 .dump_detail = smb2_dump_detail,
1425 .clear_stats = smb2_clear_stats,
1426 .print_stats = smb2_print_stats,
1427 .is_oplock_break = smb2_is_valid_oplock_break,
1428 .downgrade_oplock = smb2_downgrade_oplock,
1429 .need_neg = smb2_need_neg,
1430 .negotiate = smb2_negotiate,
1431 .negotiate_wsize = smb2_negotiate_wsize,
1432 .negotiate_rsize = smb2_negotiate_rsize,
1433 .sess_setup = SMB2_sess_setup,
1434 .logoff = SMB2_logoff,
1435 .tree_connect = SMB2_tcon,
1436 .tree_disconnect = SMB2_tdis,
1437 .qfs_tcon = smb2_qfs_tcon,
1438 .is_path_accessible = smb2_is_path_accessible,
1439 .can_echo = smb2_can_echo,
1440 .echo = SMB2_echo,
1441 .query_path_info = smb2_query_path_info,
1442 .get_srv_inum = smb2_get_srv_inum,
1443 .query_file_info = smb2_query_file_info,
1444 .set_path_size = smb2_set_path_size,
1445 .set_file_size = smb2_set_file_size,
1446 .set_file_info = smb2_set_file_info,
1447 .set_compression = smb2_set_compression,
1448 .mkdir = smb2_mkdir,
1449 .mkdir_setinfo = smb2_mkdir_setinfo,
1450 .rmdir = smb2_rmdir,
1451 .unlink = smb2_unlink,
1452 .rename = smb2_rename_path,
1453 .create_hardlink = smb2_create_hardlink,
1454 .query_symlink = smb2_query_symlink,
1455 .open = smb2_open_file,
1456 .set_fid = smb2_set_fid,
1457 .close = smb2_close_file,
1458 .flush = smb2_flush_file,
1459 .async_readv = smb2_async_readv,
1460 .async_writev = smb2_async_writev,
1461 .sync_read = smb2_sync_read,
1462 .sync_write = smb2_sync_write,
1463 .query_dir_first = smb2_query_dir_first,
1464 .query_dir_next = smb2_query_dir_next,
1465 .close_dir = smb2_close_dir,
1466 .calc_smb_size = smb2_calc_size,
1467 .is_status_pending = smb2_is_status_pending,
1468 .oplock_response = smb2_oplock_response,
1469 .queryfs = smb2_queryfs,
1470 .mand_lock = smb2_mand_lock,
1471 .mand_unlock_range = smb2_unlock_range,
1472 .push_mand_locks = smb2_push_mandatory_locks,
1473 .get_lease_key = smb2_get_lease_key,
1474 .set_lease_key = smb2_set_lease_key,
1475 .new_lease_key = smb2_new_lease_key,
1476 .calc_signature = smb2_calc_signature,
1477 .is_read_op = smb21_is_read_op,
1478 .set_oplock_level = smb21_set_oplock_level,
1479 .create_lease_buf = smb2_create_lease_buf,
1480 .parse_lease_buf = smb2_parse_lease_buf,
1481 .clone_range = smb2_clone_range,
1482 .wp_retry_size = smb2_wp_retry_size,
1483 .dir_needs_close = smb2_dir_needs_close,
1484 };
1485
1486 struct smb_version_operations smb30_operations = {
1487 .compare_fids = smb2_compare_fids,
1488 .setup_request = smb2_setup_request,
1489 .setup_async_request = smb2_setup_async_request,
1490 .check_receive = smb2_check_receive,
1491 .add_credits = smb2_add_credits,
1492 .set_credits = smb2_set_credits,
1493 .get_credits_field = smb2_get_credits_field,
1494 .get_credits = smb2_get_credits,
1495 .wait_mtu_credits = smb2_wait_mtu_credits,
1496 .get_next_mid = smb2_get_next_mid,
1497 .read_data_offset = smb2_read_data_offset,
1498 .read_data_length = smb2_read_data_length,
1499 .map_error = map_smb2_to_linux_error,
1500 .find_mid = smb2_find_mid,
1501 .check_message = smb2_check_message,
1502 .dump_detail = smb2_dump_detail,
1503 .clear_stats = smb2_clear_stats,
1504 .print_stats = smb2_print_stats,
1505 .dump_share_caps = smb2_dump_share_caps,
1506 .is_oplock_break = smb2_is_valid_oplock_break,
1507 .downgrade_oplock = smb2_downgrade_oplock,
1508 .need_neg = smb2_need_neg,
1509 .negotiate = smb2_negotiate,
1510 .negotiate_wsize = smb2_negotiate_wsize,
1511 .negotiate_rsize = smb2_negotiate_rsize,
1512 .sess_setup = SMB2_sess_setup,
1513 .logoff = SMB2_logoff,
1514 .tree_connect = SMB2_tcon,
1515 .tree_disconnect = SMB2_tdis,
1516 .qfs_tcon = smb3_qfs_tcon,
1517 .is_path_accessible = smb2_is_path_accessible,
1518 .can_echo = smb2_can_echo,
1519 .echo = SMB2_echo,
1520 .query_path_info = smb2_query_path_info,
1521 .get_srv_inum = smb2_get_srv_inum,
1522 .query_file_info = smb2_query_file_info,
1523 .set_path_size = smb2_set_path_size,
1524 .set_file_size = smb2_set_file_size,
1525 .set_file_info = smb2_set_file_info,
1526 .set_compression = smb2_set_compression,
1527 .mkdir = smb2_mkdir,
1528 .mkdir_setinfo = smb2_mkdir_setinfo,
1529 .rmdir = smb2_rmdir,
1530 .unlink = smb2_unlink,
1531 .rename = smb2_rename_path,
1532 .create_hardlink = smb2_create_hardlink,
1533 .query_symlink = smb2_query_symlink,
1534 .open = smb2_open_file,
1535 .set_fid = smb2_set_fid,
1536 .close = smb2_close_file,
1537 .flush = smb2_flush_file,
1538 .async_readv = smb2_async_readv,
1539 .async_writev = smb2_async_writev,
1540 .sync_read = smb2_sync_read,
1541 .sync_write = smb2_sync_write,
1542 .query_dir_first = smb2_query_dir_first,
1543 .query_dir_next = smb2_query_dir_next,
1544 .close_dir = smb2_close_dir,
1545 .calc_smb_size = smb2_calc_size,
1546 .is_status_pending = smb2_is_status_pending,
1547 .oplock_response = smb2_oplock_response,
1548 .queryfs = smb2_queryfs,
1549 .mand_lock = smb2_mand_lock,
1550 .mand_unlock_range = smb2_unlock_range,
1551 .push_mand_locks = smb2_push_mandatory_locks,
1552 .get_lease_key = smb2_get_lease_key,
1553 .set_lease_key = smb2_set_lease_key,
1554 .new_lease_key = smb2_new_lease_key,
1555 .generate_signingkey = generate_smb3signingkey,
1556 .calc_signature = smb3_calc_signature,
1557 .is_read_op = smb21_is_read_op,
1558 .set_oplock_level = smb3_set_oplock_level,
1559 .create_lease_buf = smb3_create_lease_buf,
1560 .parse_lease_buf = smb3_parse_lease_buf,
1561 .clone_range = smb2_clone_range,
1562 .validate_negotiate = smb3_validate_negotiate,
1563 .wp_retry_size = smb2_wp_retry_size,
1564 .dir_needs_close = smb2_dir_needs_close,
1565 .fallocate = smb3_fallocate,
1566 };
1567
1568 struct smb_version_values smb20_values = {
1569 .version_string = SMB20_VERSION_STRING,
1570 .protocol_id = SMB20_PROT_ID,
1571 .req_capabilities = 0, /* MBZ */
1572 .large_lock_type = 0,
1573 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1574 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1575 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1576 .header_size = sizeof(struct smb2_hdr),
1577 .max_header_size = MAX_SMB2_HDR_SIZE,
1578 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1579 .lock_cmd = SMB2_LOCK,
1580 .cap_unix = 0,
1581 .cap_nt_find = SMB2_NT_FIND,
1582 .cap_large_files = SMB2_LARGE_FILES,
1583 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1584 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1585 .create_lease_size = sizeof(struct create_lease),
1586 };
1587
1588 struct smb_version_values smb21_values = {
1589 .version_string = SMB21_VERSION_STRING,
1590 .protocol_id = SMB21_PROT_ID,
1591 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1592 .large_lock_type = 0,
1593 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1594 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1595 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1596 .header_size = sizeof(struct smb2_hdr),
1597 .max_header_size = MAX_SMB2_HDR_SIZE,
1598 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1599 .lock_cmd = SMB2_LOCK,
1600 .cap_unix = 0,
1601 .cap_nt_find = SMB2_NT_FIND,
1602 .cap_large_files = SMB2_LARGE_FILES,
1603 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1604 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1605 .create_lease_size = sizeof(struct create_lease),
1606 };
1607
1608 struct smb_version_values smb30_values = {
1609 .version_string = SMB30_VERSION_STRING,
1610 .protocol_id = SMB30_PROT_ID,
1611 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1612 .large_lock_type = 0,
1613 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1614 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1615 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1616 .header_size = sizeof(struct smb2_hdr),
1617 .max_header_size = MAX_SMB2_HDR_SIZE,
1618 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1619 .lock_cmd = SMB2_LOCK,
1620 .cap_unix = 0,
1621 .cap_nt_find = SMB2_NT_FIND,
1622 .cap_large_files = SMB2_LARGE_FILES,
1623 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1624 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1625 .create_lease_size = sizeof(struct create_lease_v2),
1626 };
1627
1628 struct smb_version_values smb302_values = {
1629 .version_string = SMB302_VERSION_STRING,
1630 .protocol_id = SMB302_PROT_ID,
1631 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1632 .large_lock_type = 0,
1633 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1634 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1635 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1636 .header_size = sizeof(struct smb2_hdr),
1637 .max_header_size = MAX_SMB2_HDR_SIZE,
1638 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1639 .lock_cmd = SMB2_LOCK,
1640 .cap_unix = 0,
1641 .cap_nt_find = SMB2_NT_FIND,
1642 .cap_large_files = SMB2_LARGE_FILES,
1643 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1644 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1645 .create_lease_size = sizeof(struct create_lease_v2),
1646 };
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