1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20#include <linux/pagemap.h>
21#include <linux/vfs.h>
22#include "cifsglob.h"
23#include "smb2pdu.h"
24#include "smb2proto.h"
25#include "cifsproto.h"
26#include "cifs_debug.h"
27#include "cifs_unicode.h"
28#include "smb2status.h"
29#include "smb2glob.h"
30
31static int
32change_conf(struct TCP_Server_Info *server)
33{
34 server->credits += server->echo_credits + server->oplock_credits;
35 server->oplock_credits = server->echo_credits = 0;
36 switch (server->credits) {
37 case 0:
38 return -1;
39 case 1:
40 server->echoes = false;
41 server->oplocks = false;
42 cifs_dbg(VFS, "disabling echoes and oplocks\n");
43 break;
44 case 2:
45 server->echoes = true;
46 server->oplocks = false;
47 server->echo_credits = 1;
48 cifs_dbg(FYI, "disabling oplocks\n");
49 break;
50 default:
51 server->echoes = true;
52 server->oplocks = true;
53 server->echo_credits = 1;
54 server->oplock_credits = 1;
55 }
56 server->credits -= server->echo_credits + server->oplock_credits;
57 return 0;
58}
59
60static void
61smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
62 const int optype)
63{
64 int *val, rc = 0;
65 spin_lock(&server->req_lock);
66 val = server->ops->get_credits_field(server, optype);
67 *val += add;
68 server->in_flight--;
69 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
70 rc = change_conf(server);
71
72
73
74
75 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
76 server->oplocks) {
77 if (server->credits > 1) {
78 server->credits--;
79 server->oplock_credits++;
80 }
81 }
82 spin_unlock(&server->req_lock);
83 wake_up(&server->request_q);
84 if (rc)
85 cifs_reconnect(server);
86}
87
88static void
89smb2_set_credits(struct TCP_Server_Info *server, const int val)
90{
91 spin_lock(&server->req_lock);
92 server->credits = val;
93 spin_unlock(&server->req_lock);
94}
95
96static int *
97smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
98{
99 switch (optype) {
100 case CIFS_ECHO_OP:
101 return &server->echo_credits;
102 case CIFS_OBREAK_OP:
103 return &server->oplock_credits;
104 default:
105 return &server->credits;
106 }
107}
108
109static unsigned int
110smb2_get_credits(struct mid_q_entry *mid)
111{
112 return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
113}
114
115static __u64
116smb2_get_next_mid(struct TCP_Server_Info *server)
117{
118 __u64 mid;
119
120 spin_lock(&GlobalMid_Lock);
121 mid = server->CurrentMid++;
122 spin_unlock(&GlobalMid_Lock);
123 return mid;
124}
125
126static struct mid_q_entry *
127smb2_find_mid(struct TCP_Server_Info *server, char *buf)
128{
129 struct mid_q_entry *mid;
130 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
131
132 spin_lock(&GlobalMid_Lock);
133 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
134 if ((mid->mid == hdr->MessageId) &&
135 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
136 (mid->command == hdr->Command)) {
137 spin_unlock(&GlobalMid_Lock);
138 return mid;
139 }
140 }
141 spin_unlock(&GlobalMid_Lock);
142 return NULL;
143}
144
145static void
146smb2_dump_detail(void *buf)
147{
148#ifdef CONFIG_CIFS_DEBUG2
149 struct smb2_hdr *smb = (struct smb2_hdr *)buf;
150
151 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
152 smb->Command, smb->Status, smb->Flags, smb->MessageId,
153 smb->ProcessId);
154 cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
155#endif
156}
157
158static bool
159smb2_need_neg(struct TCP_Server_Info *server)
160{
161 return server->max_read == 0;
162}
163
164static int
165smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
166{
167 int rc;
168 ses->server->CurrentMid = 0;
169 rc = SMB2_negotiate(xid, ses);
170
171 if (rc == -EAGAIN)
172 rc = -EHOSTDOWN;
173 return rc;
174}
175
176static unsigned int
177smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
178{
179 struct TCP_Server_Info *server = tcon->ses->server;
180 unsigned int wsize;
181
182
183 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
184 wsize = min_t(unsigned int, wsize, server->max_write);
185
186
187
188
189 wsize = min_t(unsigned int, wsize, 2 << 15);
190
191 return wsize;
192}
193
194static unsigned int
195smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
196{
197 struct TCP_Server_Info *server = tcon->ses->server;
198 unsigned int rsize;
199
200
201 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
202 rsize = min_t(unsigned int, rsize, server->max_read);
203
204
205
206
207 rsize = min_t(unsigned int, rsize, 2 << 15);
208
209 return rsize;
210}
211
212static int
213smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
214 struct cifs_sb_info *cifs_sb, const char *full_path)
215{
216 int rc;
217 __le16 *utf16_path;
218 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
219 struct cifs_open_parms oparms;
220 struct cifs_fid fid;
221
222 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
223 if (!utf16_path)
224 return -ENOMEM;
225
226 oparms.tcon = tcon;
227 oparms.desired_access = FILE_READ_ATTRIBUTES;
228 oparms.disposition = FILE_OPEN;
229 oparms.create_options = 0;
230 oparms.fid = &fid;
231 oparms.reconnect = false;
232
233 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
234 if (rc) {
235 kfree(utf16_path);
236 return rc;
237 }
238
239 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
240 kfree(utf16_path);
241 return rc;
242}
243
244static int
245smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
246 struct cifs_sb_info *cifs_sb, const char *full_path,
247 u64 *uniqueid, FILE_ALL_INFO *data)
248{
249 *uniqueid = le64_to_cpu(data->IndexNumber);
250 return 0;
251}
252
253static int
254smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
255 struct cifs_fid *fid, FILE_ALL_INFO *data)
256{
257 int rc;
258 struct smb2_file_all_info *smb2_data;
259
260 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
261 GFP_KERNEL);
262 if (smb2_data == NULL)
263 return -ENOMEM;
264
265 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
266 smb2_data);
267 if (!rc)
268 move_smb2_info_to_cifs(data, smb2_data);
269 kfree(smb2_data);
270 return rc;
271}
272
273static bool
274smb2_can_echo(struct TCP_Server_Info *server)
275{
276 return server->echoes;
277}
278
279static void
280smb2_clear_stats(struct cifs_tcon *tcon)
281{
282#ifdef CONFIG_CIFS_STATS
283 int i;
284 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
285 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
286 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
287 }
288#endif
289}
290
291static void
292smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
293{
294 seq_puts(m, "\n\tShare Capabilities:");
295 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
296 seq_puts(m, " DFS,");
297 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
298 seq_puts(m, " CONTINUOUS AVAILABILITY,");
299 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
300 seq_puts(m, " SCALEOUT,");
301 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
302 seq_puts(m, " CLUSTER,");
303 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
304 seq_puts(m, " ASYMMETRIC,");
305 if (tcon->capabilities == 0)
306 seq_puts(m, " None");
307 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
308}
309
310static void
311smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
312{
313#ifdef CONFIG_CIFS_STATS
314 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
315 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
316 seq_printf(m, "\nNegotiates: %d sent %d failed",
317 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
318 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
319 seq_printf(m, "\nSessionSetups: %d sent %d failed",
320 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
321 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
322 seq_printf(m, "\nLogoffs: %d sent %d failed",
323 atomic_read(&sent[SMB2_LOGOFF_HE]),
324 atomic_read(&failed[SMB2_LOGOFF_HE]));
325 seq_printf(m, "\nTreeConnects: %d sent %d failed",
326 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
327 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
328 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
329 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
330 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
331 seq_printf(m, "\nCreates: %d sent %d failed",
332 atomic_read(&sent[SMB2_CREATE_HE]),
333 atomic_read(&failed[SMB2_CREATE_HE]));
334 seq_printf(m, "\nCloses: %d sent %d failed",
335 atomic_read(&sent[SMB2_CLOSE_HE]),
336 atomic_read(&failed[SMB2_CLOSE_HE]));
337 seq_printf(m, "\nFlushes: %d sent %d failed",
338 atomic_read(&sent[SMB2_FLUSH_HE]),
339 atomic_read(&failed[SMB2_FLUSH_HE]));
340 seq_printf(m, "\nReads: %d sent %d failed",
341 atomic_read(&sent[SMB2_READ_HE]),
342 atomic_read(&failed[SMB2_READ_HE]));
343 seq_printf(m, "\nWrites: %d sent %d failed",
344 atomic_read(&sent[SMB2_WRITE_HE]),
345 atomic_read(&failed[SMB2_WRITE_HE]));
346 seq_printf(m, "\nLocks: %d sent %d failed",
347 atomic_read(&sent[SMB2_LOCK_HE]),
348 atomic_read(&failed[SMB2_LOCK_HE]));
349 seq_printf(m, "\nIOCTLs: %d sent %d failed",
350 atomic_read(&sent[SMB2_IOCTL_HE]),
351 atomic_read(&failed[SMB2_IOCTL_HE]));
352 seq_printf(m, "\nCancels: %d sent %d failed",
353 atomic_read(&sent[SMB2_CANCEL_HE]),
354 atomic_read(&failed[SMB2_CANCEL_HE]));
355 seq_printf(m, "\nEchos: %d sent %d failed",
356 atomic_read(&sent[SMB2_ECHO_HE]),
357 atomic_read(&failed[SMB2_ECHO_HE]));
358 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
359 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
360 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
361 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
362 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
363 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
364 seq_printf(m, "\nQueryInfos: %d sent %d failed",
365 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
366 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
367 seq_printf(m, "\nSetInfos: %d sent %d failed",
368 atomic_read(&sent[SMB2_SET_INFO_HE]),
369 atomic_read(&failed[SMB2_SET_INFO_HE]));
370 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
371 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
372 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
373#endif
374}
375
376static void
377smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
378{
379 struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
380 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
381
382 cfile->fid.persistent_fid = fid->persistent_fid;
383 cfile->fid.volatile_fid = fid->volatile_fid;
384 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
385 &fid->purge_cache);
386 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
387}
388
389static void
390smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
391 struct cifs_fid *fid)
392{
393 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
394}
395
396static int
397smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
398 struct cifs_fid *fid)
399{
400 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
401}
402
403static unsigned int
404smb2_read_data_offset(char *buf)
405{
406 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
407 return rsp->DataOffset;
408}
409
410static unsigned int
411smb2_read_data_length(char *buf)
412{
413 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
414 return le32_to_cpu(rsp->DataLength);
415}
416
417
418static int
419smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
420 struct cifs_io_parms *parms, unsigned int *bytes_read,
421 char **buf, int *buf_type)
422{
423 parms->persistent_fid = cfile->fid.persistent_fid;
424 parms->volatile_fid = cfile->fid.volatile_fid;
425 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
426}
427
428static int
429smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
430 struct cifs_io_parms *parms, unsigned int *written,
431 struct kvec *iov, unsigned long nr_segs)
432{
433
434 parms->persistent_fid = cfile->fid.persistent_fid;
435 parms->volatile_fid = cfile->fid.volatile_fid;
436 return SMB2_write(xid, parms, written, iov, nr_segs);
437}
438
439static int
440smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
441 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
442{
443 __le64 eof = cpu_to_le64(size);
444 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
445 cfile->fid.volatile_fid, cfile->pid, &eof);
446}
447
448static int
449smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
450 const char *path, struct cifs_sb_info *cifs_sb,
451 struct cifs_fid *fid, __u16 search_flags,
452 struct cifs_search_info *srch_inf)
453{
454 __le16 *utf16_path;
455 int rc;
456 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
457 struct cifs_open_parms oparms;
458
459 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
460 if (!utf16_path)
461 return -ENOMEM;
462
463 oparms.tcon = tcon;
464 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
465 oparms.disposition = FILE_OPEN;
466 oparms.create_options = 0;
467 oparms.fid = fid;
468 oparms.reconnect = false;
469
470 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
471 kfree(utf16_path);
472 if (rc) {
473 cifs_dbg(VFS, "open dir failed\n");
474 return rc;
475 }
476
477 srch_inf->entries_in_buffer = 0;
478 srch_inf->index_of_last_entry = 0;
479
480 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
481 fid->volatile_fid, 0, srch_inf);
482 if (rc) {
483 cifs_dbg(VFS, "query directory failed\n");
484 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
485 }
486 return rc;
487}
488
489static int
490smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
491 struct cifs_fid *fid, __u16 search_flags,
492 struct cifs_search_info *srch_inf)
493{
494 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
495 fid->volatile_fid, 0, srch_inf);
496}
497
498static int
499smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
500 struct cifs_fid *fid)
501{
502 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
503}
504
505
506
507
508
509static bool
510smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
511{
512 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
513
514 if (hdr->Status != STATUS_PENDING)
515 return false;
516
517 if (!length) {
518 spin_lock(&server->req_lock);
519 server->credits += le16_to_cpu(hdr->CreditRequest);
520 spin_unlock(&server->req_lock);
521 wake_up(&server->request_q);
522 }
523
524 return true;
525}
526
527static int
528smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
529 struct cifsInodeInfo *cinode)
530{
531 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
532 return SMB2_lease_break(0, tcon, cinode->lease_key,
533 smb2_get_lease_state(cinode));
534
535 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
536 fid->volatile_fid,
537 CIFS_CACHE_READ(cinode) ? 1 : 0);
538}
539
540static int
541smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
542 struct kstatfs *buf)
543{
544 int rc;
545 __le16 srch_path = 0;
546 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
547 struct cifs_open_parms oparms;
548 struct cifs_fid fid;
549
550 oparms.tcon = tcon;
551 oparms.desired_access = FILE_READ_ATTRIBUTES;
552 oparms.disposition = FILE_OPEN;
553 oparms.create_options = 0;
554 oparms.fid = &fid;
555 oparms.reconnect = false;
556
557 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
558 if (rc)
559 return rc;
560 buf->f_type = SMB2_MAGIC_NUMBER;
561 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
562 buf);
563 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
564 return rc;
565}
566
567static bool
568smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
569{
570 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
571 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
572}
573
574static int
575smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
576 __u64 length, __u32 type, int lock, int unlock, bool wait)
577{
578 if (unlock && !lock)
579 type = SMB2_LOCKFLAG_UNLOCK;
580 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
581 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
582 current->tgid, length, offset, type, wait);
583}
584
585static void
586smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
587{
588 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
589}
590
591static void
592smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
593{
594 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
595}
596
597static void
598smb2_new_lease_key(struct cifs_fid *fid)
599{
600 get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
601}
602
603static int
604smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
605 const char *full_path, char **target_path,
606 struct cifs_sb_info *cifs_sb)
607{
608 int rc;
609 __le16 *utf16_path;
610 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
611 struct cifs_open_parms oparms;
612 struct cifs_fid fid;
613 struct smb2_err_rsp *err_buf = NULL;
614 struct smb2_symlink_err_rsp *symlink;
615 unsigned int sub_len, sub_offset;
616
617 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
618
619 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
620 if (!utf16_path)
621 return -ENOMEM;
622
623 oparms.tcon = tcon;
624 oparms.desired_access = FILE_READ_ATTRIBUTES;
625 oparms.disposition = FILE_OPEN;
626 oparms.create_options = 0;
627 oparms.fid = &fid;
628 oparms.reconnect = false;
629
630 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
631
632 if (!rc || !err_buf) {
633 kfree(utf16_path);
634 return -ENOENT;
635 }
636
637 rc = 0;
638 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
639 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
640 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
641 *target_path = cifs_strndup_from_utf16(
642 (char *)symlink->PathBuffer + sub_offset,
643 sub_len, true, cifs_sb->local_nls);
644 if (!(*target_path)) {
645 kfree(utf16_path);
646 return -ENOMEM;
647 }
648 convert_delimiter(*target_path, '/');
649 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
650 kfree(utf16_path);
651 return rc;
652}
653
654static void
655smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
656 unsigned int epoch, bool *purge_cache)
657{
658 oplock &= 0xFF;
659 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
660 return;
661 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
662 cinode->oplock = CIFS_CACHE_RHW_FLG;
663 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
664 &cinode->vfs_inode);
665 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
666 cinode->oplock = CIFS_CACHE_RW_FLG;
667 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
668 &cinode->vfs_inode);
669 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
670 cinode->oplock = CIFS_CACHE_READ_FLG;
671 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
672 &cinode->vfs_inode);
673 } else
674 cinode->oplock = 0;
675}
676
677static void
678smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
679 unsigned int epoch, bool *purge_cache)
680{
681 char message[5] = {0};
682
683 oplock &= 0xFF;
684 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
685 return;
686
687 cinode->oplock = 0;
688 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
689 cinode->oplock |= CIFS_CACHE_READ_FLG;
690 strcat(message, "R");
691 }
692 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
693 cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
694 strcat(message, "H");
695 }
696 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
697 cinode->oplock |= CIFS_CACHE_WRITE_FLG;
698 strcat(message, "W");
699 }
700 if (!cinode->oplock)
701 strcat(message, "None");
702 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
703 &cinode->vfs_inode);
704}
705
706static void
707smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
708 unsigned int epoch, bool *purge_cache)
709{
710 unsigned int old_oplock = cinode->oplock;
711
712 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
713
714 if (purge_cache) {
715 *purge_cache = false;
716 if (old_oplock == CIFS_CACHE_READ_FLG) {
717 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
718 (epoch - cinode->epoch > 0))
719 *purge_cache = true;
720 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
721 (epoch - cinode->epoch > 1))
722 *purge_cache = true;
723 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
724 (epoch - cinode->epoch > 1))
725 *purge_cache = true;
726 else if (cinode->oplock == 0 &&
727 (epoch - cinode->epoch > 0))
728 *purge_cache = true;
729 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
730 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
731 (epoch - cinode->epoch > 0))
732 *purge_cache = true;
733 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
734 (epoch - cinode->epoch > 1))
735 *purge_cache = true;
736 }
737 cinode->epoch = epoch;
738 }
739}
740
741static bool
742smb2_is_read_op(__u32 oplock)
743{
744 return oplock == SMB2_OPLOCK_LEVEL_II;
745}
746
747static bool
748smb21_is_read_op(__u32 oplock)
749{
750 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
751 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
752}
753
754static __le32
755map_oplock_to_lease(u8 oplock)
756{
757 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
758 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
759 else if (oplock == SMB2_OPLOCK_LEVEL_II)
760 return SMB2_LEASE_READ_CACHING;
761 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
762 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
763 SMB2_LEASE_WRITE_CACHING;
764 return 0;
765}
766
767static char *
768smb2_create_lease_buf(u8 *lease_key, u8 oplock)
769{
770 struct create_lease *buf;
771
772 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
773 if (!buf)
774 return NULL;
775
776 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
777 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
778 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
779
780 buf->ccontext.DataOffset = cpu_to_le16(offsetof
781 (struct create_lease, lcontext));
782 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
783 buf->ccontext.NameOffset = cpu_to_le16(offsetof
784 (struct create_lease, Name));
785 buf->ccontext.NameLength = cpu_to_le16(4);
786 buf->Name[0] = 'R';
787 buf->Name[1] = 'q';
788 buf->Name[2] = 'L';
789 buf->Name[3] = 's';
790 return (char *)buf;
791}
792
793static char *
794smb3_create_lease_buf(u8 *lease_key, u8 oplock)
795{
796 struct create_lease_v2 *buf;
797
798 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
799 if (!buf)
800 return NULL;
801
802 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
803 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
804 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
805
806 buf->ccontext.DataOffset = cpu_to_le16(offsetof
807 (struct create_lease_v2, lcontext));
808 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
809 buf->ccontext.NameOffset = cpu_to_le16(offsetof
810 (struct create_lease_v2, Name));
811 buf->ccontext.NameLength = cpu_to_le16(4);
812 buf->Name[0] = 'R';
813 buf->Name[1] = 'q';
814 buf->Name[2] = 'L';
815 buf->Name[3] = 's';
816 return (char *)buf;
817}
818
819static __u8
820smb2_parse_lease_buf(void *buf, unsigned int *epoch)
821{
822 struct create_lease *lc = (struct create_lease *)buf;
823
824 *epoch = 0;
825 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
826 return SMB2_OPLOCK_LEVEL_NOCHANGE;
827 return le32_to_cpu(lc->lcontext.LeaseState);
828}
829
830static __u8
831smb3_parse_lease_buf(void *buf, unsigned int *epoch)
832{
833 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
834
835 *epoch = le16_to_cpu(lc->lcontext.Epoch);
836 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
837 return SMB2_OPLOCK_LEVEL_NOCHANGE;
838 return le32_to_cpu(lc->lcontext.LeaseState);
839}
840
841struct smb_version_operations smb20_operations = {
842 .compare_fids = smb2_compare_fids,
843 .setup_request = smb2_setup_request,
844 .setup_async_request = smb2_setup_async_request,
845 .check_receive = smb2_check_receive,
846 .add_credits = smb2_add_credits,
847 .set_credits = smb2_set_credits,
848 .get_credits_field = smb2_get_credits_field,
849 .get_credits = smb2_get_credits,
850 .get_next_mid = smb2_get_next_mid,
851 .read_data_offset = smb2_read_data_offset,
852 .read_data_length = smb2_read_data_length,
853 .map_error = map_smb2_to_linux_error,
854 .find_mid = smb2_find_mid,
855 .check_message = smb2_check_message,
856 .dump_detail = smb2_dump_detail,
857 .clear_stats = smb2_clear_stats,
858 .print_stats = smb2_print_stats,
859 .is_oplock_break = smb2_is_valid_oplock_break,
860 .need_neg = smb2_need_neg,
861 .negotiate = smb2_negotiate,
862 .negotiate_wsize = smb2_negotiate_wsize,
863 .negotiate_rsize = smb2_negotiate_rsize,
864 .sess_setup = SMB2_sess_setup,
865 .logoff = SMB2_logoff,
866 .tree_connect = SMB2_tcon,
867 .tree_disconnect = SMB2_tdis,
868 .is_path_accessible = smb2_is_path_accessible,
869 .can_echo = smb2_can_echo,
870 .echo = SMB2_echo,
871 .query_path_info = smb2_query_path_info,
872 .get_srv_inum = smb2_get_srv_inum,
873 .query_file_info = smb2_query_file_info,
874 .set_path_size = smb2_set_path_size,
875 .set_file_size = smb2_set_file_size,
876 .set_file_info = smb2_set_file_info,
877 .mkdir = smb2_mkdir,
878 .mkdir_setinfo = smb2_mkdir_setinfo,
879 .rmdir = smb2_rmdir,
880 .unlink = smb2_unlink,
881 .rename = smb2_rename_path,
882 .create_hardlink = smb2_create_hardlink,
883 .query_symlink = smb2_query_symlink,
884 .open = smb2_open_file,
885 .set_fid = smb2_set_fid,
886 .close = smb2_close_file,
887 .flush = smb2_flush_file,
888 .async_readv = smb2_async_readv,
889 .async_writev = smb2_async_writev,
890 .sync_read = smb2_sync_read,
891 .sync_write = smb2_sync_write,
892 .query_dir_first = smb2_query_dir_first,
893 .query_dir_next = smb2_query_dir_next,
894 .close_dir = smb2_close_dir,
895 .calc_smb_size = smb2_calc_size,
896 .is_status_pending = smb2_is_status_pending,
897 .oplock_response = smb2_oplock_response,
898 .queryfs = smb2_queryfs,
899 .mand_lock = smb2_mand_lock,
900 .mand_unlock_range = smb2_unlock_range,
901 .push_mand_locks = smb2_push_mandatory_locks,
902 .get_lease_key = smb2_get_lease_key,
903 .set_lease_key = smb2_set_lease_key,
904 .new_lease_key = smb2_new_lease_key,
905 .calc_signature = smb2_calc_signature,
906 .is_read_op = smb2_is_read_op,
907 .set_oplock_level = smb2_set_oplock_level,
908 .create_lease_buf = smb2_create_lease_buf,
909 .parse_lease_buf = smb2_parse_lease_buf,
910};
911
912struct smb_version_operations smb21_operations = {
913 .compare_fids = smb2_compare_fids,
914 .setup_request = smb2_setup_request,
915 .setup_async_request = smb2_setup_async_request,
916 .check_receive = smb2_check_receive,
917 .add_credits = smb2_add_credits,
918 .set_credits = smb2_set_credits,
919 .get_credits_field = smb2_get_credits_field,
920 .get_credits = smb2_get_credits,
921 .get_next_mid = smb2_get_next_mid,
922 .read_data_offset = smb2_read_data_offset,
923 .read_data_length = smb2_read_data_length,
924 .map_error = map_smb2_to_linux_error,
925 .find_mid = smb2_find_mid,
926 .check_message = smb2_check_message,
927 .dump_detail = smb2_dump_detail,
928 .clear_stats = smb2_clear_stats,
929 .print_stats = smb2_print_stats,
930 .is_oplock_break = smb2_is_valid_oplock_break,
931 .need_neg = smb2_need_neg,
932 .negotiate = smb2_negotiate,
933 .negotiate_wsize = smb2_negotiate_wsize,
934 .negotiate_rsize = smb2_negotiate_rsize,
935 .sess_setup = SMB2_sess_setup,
936 .logoff = SMB2_logoff,
937 .tree_connect = SMB2_tcon,
938 .tree_disconnect = SMB2_tdis,
939 .is_path_accessible = smb2_is_path_accessible,
940 .can_echo = smb2_can_echo,
941 .echo = SMB2_echo,
942 .query_path_info = smb2_query_path_info,
943 .get_srv_inum = smb2_get_srv_inum,
944 .query_file_info = smb2_query_file_info,
945 .set_path_size = smb2_set_path_size,
946 .set_file_size = smb2_set_file_size,
947 .set_file_info = smb2_set_file_info,
948 .mkdir = smb2_mkdir,
949 .mkdir_setinfo = smb2_mkdir_setinfo,
950 .rmdir = smb2_rmdir,
951 .unlink = smb2_unlink,
952 .rename = smb2_rename_path,
953 .create_hardlink = smb2_create_hardlink,
954 .query_symlink = smb2_query_symlink,
955 .open = smb2_open_file,
956 .set_fid = smb2_set_fid,
957 .close = smb2_close_file,
958 .flush = smb2_flush_file,
959 .async_readv = smb2_async_readv,
960 .async_writev = smb2_async_writev,
961 .sync_read = smb2_sync_read,
962 .sync_write = smb2_sync_write,
963 .query_dir_first = smb2_query_dir_first,
964 .query_dir_next = smb2_query_dir_next,
965 .close_dir = smb2_close_dir,
966 .calc_smb_size = smb2_calc_size,
967 .is_status_pending = smb2_is_status_pending,
968 .oplock_response = smb2_oplock_response,
969 .queryfs = smb2_queryfs,
970 .mand_lock = smb2_mand_lock,
971 .mand_unlock_range = smb2_unlock_range,
972 .push_mand_locks = smb2_push_mandatory_locks,
973 .get_lease_key = smb2_get_lease_key,
974 .set_lease_key = smb2_set_lease_key,
975 .new_lease_key = smb2_new_lease_key,
976 .calc_signature = smb2_calc_signature,
977 .is_read_op = smb21_is_read_op,
978 .set_oplock_level = smb21_set_oplock_level,
979 .create_lease_buf = smb2_create_lease_buf,
980 .parse_lease_buf = smb2_parse_lease_buf,
981};
982
983struct smb_version_operations smb30_operations = {
984 .compare_fids = smb2_compare_fids,
985 .setup_request = smb2_setup_request,
986 .setup_async_request = smb2_setup_async_request,
987 .check_receive = smb2_check_receive,
988 .add_credits = smb2_add_credits,
989 .set_credits = smb2_set_credits,
990 .get_credits_field = smb2_get_credits_field,
991 .get_credits = smb2_get_credits,
992 .get_next_mid = smb2_get_next_mid,
993 .read_data_offset = smb2_read_data_offset,
994 .read_data_length = smb2_read_data_length,
995 .map_error = map_smb2_to_linux_error,
996 .find_mid = smb2_find_mid,
997 .check_message = smb2_check_message,
998 .dump_detail = smb2_dump_detail,
999 .clear_stats = smb2_clear_stats,
1000 .print_stats = smb2_print_stats,
1001 .dump_share_caps = smb2_dump_share_caps,
1002 .is_oplock_break = smb2_is_valid_oplock_break,
1003 .need_neg = smb2_need_neg,
1004 .negotiate = smb2_negotiate,
1005 .negotiate_wsize = smb2_negotiate_wsize,
1006 .negotiate_rsize = smb2_negotiate_rsize,
1007 .sess_setup = SMB2_sess_setup,
1008 .logoff = SMB2_logoff,
1009 .tree_connect = SMB2_tcon,
1010 .tree_disconnect = SMB2_tdis,
1011 .is_path_accessible = smb2_is_path_accessible,
1012 .can_echo = smb2_can_echo,
1013 .echo = SMB2_echo,
1014 .query_path_info = smb2_query_path_info,
1015 .get_srv_inum = smb2_get_srv_inum,
1016 .query_file_info = smb2_query_file_info,
1017 .set_path_size = smb2_set_path_size,
1018 .set_file_size = smb2_set_file_size,
1019 .set_file_info = smb2_set_file_info,
1020 .mkdir = smb2_mkdir,
1021 .mkdir_setinfo = smb2_mkdir_setinfo,
1022 .rmdir = smb2_rmdir,
1023 .unlink = smb2_unlink,
1024 .rename = smb2_rename_path,
1025 .create_hardlink = smb2_create_hardlink,
1026 .query_symlink = smb2_query_symlink,
1027 .open = smb2_open_file,
1028 .set_fid = smb2_set_fid,
1029 .close = smb2_close_file,
1030 .flush = smb2_flush_file,
1031 .async_readv = smb2_async_readv,
1032 .async_writev = smb2_async_writev,
1033 .sync_read = smb2_sync_read,
1034 .sync_write = smb2_sync_write,
1035 .query_dir_first = smb2_query_dir_first,
1036 .query_dir_next = smb2_query_dir_next,
1037 .close_dir = smb2_close_dir,
1038 .calc_smb_size = smb2_calc_size,
1039 .is_status_pending = smb2_is_status_pending,
1040 .oplock_response = smb2_oplock_response,
1041 .queryfs = smb2_queryfs,
1042 .mand_lock = smb2_mand_lock,
1043 .mand_unlock_range = smb2_unlock_range,
1044 .push_mand_locks = smb2_push_mandatory_locks,
1045 .get_lease_key = smb2_get_lease_key,
1046 .set_lease_key = smb2_set_lease_key,
1047 .new_lease_key = smb2_new_lease_key,
1048 .generate_signingkey = generate_smb3signingkey,
1049 .calc_signature = smb3_calc_signature,
1050 .is_read_op = smb21_is_read_op,
1051 .set_oplock_level = smb3_set_oplock_level,
1052 .create_lease_buf = smb3_create_lease_buf,
1053 .parse_lease_buf = smb3_parse_lease_buf,
1054};
1055
1056struct smb_version_values smb20_values = {
1057 .version_string = SMB20_VERSION_STRING,
1058 .protocol_id = SMB20_PROT_ID,
1059 .req_capabilities = 0,
1060 .large_lock_type = 0,
1061 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1062 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1063 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1064 .header_size = sizeof(struct smb2_hdr),
1065 .max_header_size = MAX_SMB2_HDR_SIZE,
1066 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1067 .lock_cmd = SMB2_LOCK,
1068 .cap_unix = 0,
1069 .cap_nt_find = SMB2_NT_FIND,
1070 .cap_large_files = SMB2_LARGE_FILES,
1071 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1072 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1073 .create_lease_size = sizeof(struct create_lease),
1074};
1075
1076struct smb_version_values smb21_values = {
1077 .version_string = SMB21_VERSION_STRING,
1078 .protocol_id = SMB21_PROT_ID,
1079 .req_capabilities = 0,
1080 .large_lock_type = 0,
1081 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1082 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1083 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1084 .header_size = sizeof(struct smb2_hdr),
1085 .max_header_size = MAX_SMB2_HDR_SIZE,
1086 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1087 .lock_cmd = SMB2_LOCK,
1088 .cap_unix = 0,
1089 .cap_nt_find = SMB2_NT_FIND,
1090 .cap_large_files = SMB2_LARGE_FILES,
1091 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1092 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1093 .create_lease_size = sizeof(struct create_lease),
1094};
1095
1096struct smb_version_values smb30_values = {
1097 .version_string = SMB30_VERSION_STRING,
1098 .protocol_id = SMB30_PROT_ID,
1099 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1100 .large_lock_type = 0,
1101 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1102 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1103 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1104 .header_size = sizeof(struct smb2_hdr),
1105 .max_header_size = MAX_SMB2_HDR_SIZE,
1106 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1107 .lock_cmd = SMB2_LOCK,
1108 .cap_unix = 0,
1109 .cap_nt_find = SMB2_NT_FIND,
1110 .cap_large_files = SMB2_LARGE_FILES,
1111 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1112 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1113 .create_lease_size = sizeof(struct create_lease_v2),
1114};
1115
1116struct smb_version_values smb302_values = {
1117 .version_string = SMB302_VERSION_STRING,
1118 .protocol_id = SMB302_PROT_ID,
1119 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
1120 .large_lock_type = 0,
1121 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1122 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1123 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1124 .header_size = sizeof(struct smb2_hdr),
1125 .max_header_size = MAX_SMB2_HDR_SIZE,
1126 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1127 .lock_cmd = SMB2_LOCK,
1128 .cap_unix = 0,
1129 .cap_nt_find = SMB2_NT_FIND,
1130 .cap_large_files = SMB2_LARGE_FILES,
1131 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1132 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1133 .create_lease_size = sizeof(struct create_lease_v2),
1134};
1135
