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 "cifsglob.h"
23 #include "smb2pdu.h"
24 #include "smb2proto.h"
25 #include "cifsproto.h"
26 #include "cifs_debug.h"
27 #include "smb2status.h"
28 #include "smb2glob.h"
29
30 static int
change_conf(struct TCP_Server_Info * server)31 change_conf(struct TCP_Server_Info *server)
32 {
33 server->credits += server->echo_credits + server->oplock_credits;
34 server->oplock_credits = server->echo_credits = 0;
35 switch (server->credits) {
36 case 0:
37 return -1;
38 case 1:
39 server->echoes = false;
40 server->oplocks = false;
41 cifs_dbg(VFS, "disabling echoes and oplocks\n");
42 break;
43 case 2:
44 server->echoes = true;
45 server->oplocks = false;
46 server->echo_credits = 1;
47 cifs_dbg(FYI, "disabling oplocks\n");
48 break;
49 default:
50 server->echoes = true;
51 server->oplocks = true;
52 server->echo_credits = 1;
53 server->oplock_credits = 1;
54 }
55 server->credits -= server->echo_credits + server->oplock_credits;
56 return 0;
57 }
58
59 static void
smb2_add_credits(struct TCP_Server_Info * server,const unsigned int add,const int optype)60 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
61 const int optype)
62 {
63 int *val, rc = 0;
64 spin_lock(&server->req_lock);
65 val = server->ops->get_credits_field(server, optype);
66 *val += add;
67 server->in_flight--;
68 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
69 rc = change_conf(server);
70 /*
71 * Sometimes server returns 0 credits on oplock break ack - we need to
72 * rebalance credits in this case.
73 */
74 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
75 server->oplocks) {
76 if (server->credits > 1) {
77 server->credits--;
78 server->oplock_credits++;
79 }
80 }
81 spin_unlock(&server->req_lock);
82 wake_up(&server->request_q);
83 if (rc)
84 cifs_reconnect(server);
85 }
86
87 static void
smb2_set_credits(struct TCP_Server_Info * server,const int val)88 smb2_set_credits(struct TCP_Server_Info *server, const int val)
89 {
90 spin_lock(&server->req_lock);
91 server->credits = val;
92 spin_unlock(&server->req_lock);
93 }
94
95 static int *
smb2_get_credits_field(struct TCP_Server_Info * server,const int optype)96 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
97 {
98 switch (optype) {
99 case CIFS_ECHO_OP:
100 return &server->echo_credits;
101 case CIFS_OBREAK_OP:
102 return &server->oplock_credits;
103 default:
104 return &server->credits;
105 }
106 }
107
108 static unsigned int
smb2_get_credits(struct mid_q_entry * mid)109 smb2_get_credits(struct mid_q_entry *mid)
110 {
111 return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
112 }
113
114 static __u64
smb2_get_next_mid(struct TCP_Server_Info * server)115 smb2_get_next_mid(struct TCP_Server_Info *server)
116 {
117 __u64 mid;
118 /* for SMB2 we need the current value */
119 spin_lock(&GlobalMid_Lock);
120 mid = server->CurrentMid++;
121 spin_unlock(&GlobalMid_Lock);
122 return mid;
123 }
124
125 static struct mid_q_entry *
smb2_find_mid(struct TCP_Server_Info * server,char * buf)126 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
127 {
128 struct mid_q_entry *mid;
129 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
130
131 spin_lock(&GlobalMid_Lock);
132 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
133 if ((mid->mid == hdr->MessageId) &&
134 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
135 (mid->command == hdr->Command)) {
136 spin_unlock(&GlobalMid_Lock);
137 return mid;
138 }
139 }
140 spin_unlock(&GlobalMid_Lock);
141 return NULL;
142 }
143
144 static void
smb2_dump_detail(void * buf)145 smb2_dump_detail(void *buf)
146 {
147 #ifdef CONFIG_CIFS_DEBUG2
148 struct smb2_hdr *smb = (struct smb2_hdr *)buf;
149
150 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
151 smb->Command, smb->Status, smb->Flags, smb->MessageId,
152 smb->ProcessId);
153 cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
154 #endif
155 }
156
157 static bool
smb2_need_neg(struct TCP_Server_Info * server)158 smb2_need_neg(struct TCP_Server_Info *server)
159 {
160 return server->max_read == 0;
161 }
162
163 static int
smb2_negotiate(const unsigned int xid,struct cifs_ses * ses)164 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
165 {
166 int rc;
167 ses->server->CurrentMid = 0;
168 rc = SMB2_negotiate(xid, ses);
169 /* BB we probably don't need to retry with modern servers */
170 if (rc == -EAGAIN)
171 rc = -EHOSTDOWN;
172 return rc;
173 }
174
175 static unsigned int
smb2_negotiate_wsize(struct cifs_tcon * tcon,struct smb_vol * volume_info)176 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
177 {
178 struct TCP_Server_Info *server = tcon->ses->server;
179 unsigned int wsize;
180
181 /* start with specified wsize, or default */
182 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
183 wsize = min_t(unsigned int, wsize, server->max_write);
184 /*
185 * limit write size to 2 ** 16, because we don't support multicredit
186 * requests now.
187 */
188 wsize = min_t(unsigned int, wsize, 2 << 15);
189
190 return wsize;
191 }
192
193 static unsigned int
smb2_negotiate_rsize(struct cifs_tcon * tcon,struct smb_vol * volume_info)194 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
195 {
196 struct TCP_Server_Info *server = tcon->ses->server;
197 unsigned int rsize;
198
199 /* start with specified rsize, or default */
200 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
201 rsize = min_t(unsigned int, rsize, server->max_read);
202 /*
203 * limit write size to 2 ** 16, because we don't support multicredit
204 * requests now.
205 */
206 rsize = min_t(unsigned int, rsize, 2 << 15);
207
208 return rsize;
209 }
210
211 static int
smb2_is_path_accessible(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path)212 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
213 struct cifs_sb_info *cifs_sb, const char *full_path)
214 {
215 int rc;
216 __u64 persistent_fid, volatile_fid;
217 __le16 *utf16_path;
218 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
219
220 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
221 if (!utf16_path)
222 return -ENOMEM;
223
224 rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
225 FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL);
226 if (rc) {
227 kfree(utf16_path);
228 return rc;
229 }
230
231 rc = SMB2_close(xid, tcon, persistent_fid, volatile_fid);
232 kfree(utf16_path);
233 return rc;
234 }
235
236 static int
smb2_get_srv_inum(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path,u64 * uniqueid,FILE_ALL_INFO * data)237 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
238 struct cifs_sb_info *cifs_sb, const char *full_path,
239 u64 *uniqueid, FILE_ALL_INFO *data)
240 {
241 *uniqueid = le64_to_cpu(data->IndexNumber);
242 return 0;
243 }
244
245 static int
smb2_query_file_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid,FILE_ALL_INFO * data)246 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
247 struct cifs_fid *fid, FILE_ALL_INFO *data)
248 {
249 int rc;
250 struct smb2_file_all_info *smb2_data;
251
252 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + MAX_NAME * 2,
253 GFP_KERNEL);
254 if (smb2_data == NULL)
255 return -ENOMEM;
256
257 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
258 smb2_data);
259 if (!rc)
260 move_smb2_info_to_cifs(data, smb2_data);
261 kfree(smb2_data);
262 return rc;
263 }
264
265 static bool
smb2_can_echo(struct TCP_Server_Info * server)266 smb2_can_echo(struct TCP_Server_Info *server)
267 {
268 return server->echoes;
269 }
270
271 static void
smb2_clear_stats(struct cifs_tcon * tcon)272 smb2_clear_stats(struct cifs_tcon *tcon)
273 {
274 #ifdef CONFIG_CIFS_STATS
275 int i;
276 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
277 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
278 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
279 }
280 #endif
281 }
282
283 static void
smb2_print_stats(struct seq_file * m,struct cifs_tcon * tcon)284 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
285 {
286 #ifdef CONFIG_CIFS_STATS
287 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
288 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
289 seq_printf(m, "\nNegotiates: %d sent %d failed",
290 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
291 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
292 seq_printf(m, "\nSessionSetups: %d sent %d failed",
293 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
294 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
295 #define SMB2LOGOFF 0x0002 /* trivial request/resp */
296 seq_printf(m, "\nLogoffs: %d sent %d failed",
297 atomic_read(&sent[SMB2_LOGOFF_HE]),
298 atomic_read(&failed[SMB2_LOGOFF_HE]));
299 seq_printf(m, "\nTreeConnects: %d sent %d failed",
300 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
301 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
302 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
303 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
304 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
305 seq_printf(m, "\nCreates: %d sent %d failed",
306 atomic_read(&sent[SMB2_CREATE_HE]),
307 atomic_read(&failed[SMB2_CREATE_HE]));
308 seq_printf(m, "\nCloses: %d sent %d failed",
309 atomic_read(&sent[SMB2_CLOSE_HE]),
310 atomic_read(&failed[SMB2_CLOSE_HE]));
311 seq_printf(m, "\nFlushes: %d sent %d failed",
312 atomic_read(&sent[SMB2_FLUSH_HE]),
313 atomic_read(&failed[SMB2_FLUSH_HE]));
314 seq_printf(m, "\nReads: %d sent %d failed",
315 atomic_read(&sent[SMB2_READ_HE]),
316 atomic_read(&failed[SMB2_READ_HE]));
317 seq_printf(m, "\nWrites: %d sent %d failed",
318 atomic_read(&sent[SMB2_WRITE_HE]),
319 atomic_read(&failed[SMB2_WRITE_HE]));
320 seq_printf(m, "\nLocks: %d sent %d failed",
321 atomic_read(&sent[SMB2_LOCK_HE]),
322 atomic_read(&failed[SMB2_LOCK_HE]));
323 seq_printf(m, "\nIOCTLs: %d sent %d failed",
324 atomic_read(&sent[SMB2_IOCTL_HE]),
325 atomic_read(&failed[SMB2_IOCTL_HE]));
326 seq_printf(m, "\nCancels: %d sent %d failed",
327 atomic_read(&sent[SMB2_CANCEL_HE]),
328 atomic_read(&failed[SMB2_CANCEL_HE]));
329 seq_printf(m, "\nEchos: %d sent %d failed",
330 atomic_read(&sent[SMB2_ECHO_HE]),
331 atomic_read(&failed[SMB2_ECHO_HE]));
332 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
333 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
334 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
335 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
336 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
337 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
338 seq_printf(m, "\nQueryInfos: %d sent %d failed",
339 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
340 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
341 seq_printf(m, "\nSetInfos: %d sent %d failed",
342 atomic_read(&sent[SMB2_SET_INFO_HE]),
343 atomic_read(&failed[SMB2_SET_INFO_HE]));
344 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
345 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
346 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
347 #endif
348 }
349
350 static void
smb2_set_fid(struct cifsFileInfo * cfile,struct cifs_fid * fid,__u32 oplock)351 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
352 {
353 struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode);
354 cfile->fid.persistent_fid = fid->persistent_fid;
355 cfile->fid.volatile_fid = fid->volatile_fid;
356 smb2_set_oplock_level(cinode, oplock);
357 cinode->can_cache_brlcks = cinode->clientCanCacheAll;
358 }
359
360 static void
smb2_close_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)361 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
362 struct cifs_fid *fid)
363 {
364 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
365 }
366
367 static int
smb2_flush_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)368 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
369 struct cifs_fid *fid)
370 {
371 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
372 }
373
374 static unsigned int
smb2_read_data_offset(char * buf)375 smb2_read_data_offset(char *buf)
376 {
377 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
378 return rsp->DataOffset;
379 }
380
381 static unsigned int
smb2_read_data_length(char * buf)382 smb2_read_data_length(char *buf)
383 {
384 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
385 return le32_to_cpu(rsp->DataLength);
386 }
387
388
389 static int
smb2_sync_read(const unsigned int xid,struct cifsFileInfo * cfile,struct cifs_io_parms * parms,unsigned int * bytes_read,char ** buf,int * buf_type)390 smb2_sync_read(const unsigned int xid, struct cifsFileInfo *cfile,
391 struct cifs_io_parms *parms, unsigned int *bytes_read,
392 char **buf, int *buf_type)
393 {
394 parms->persistent_fid = cfile->fid.persistent_fid;
395 parms->volatile_fid = cfile->fid.volatile_fid;
396 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
397 }
398
399 static int
smb2_sync_write(const unsigned int xid,struct cifsFileInfo * cfile,struct cifs_io_parms * parms,unsigned int * written,struct kvec * iov,unsigned long nr_segs)400 smb2_sync_write(const unsigned int xid, struct cifsFileInfo *cfile,
401 struct cifs_io_parms *parms, unsigned int *written,
402 struct kvec *iov, unsigned long nr_segs)
403 {
404
405 parms->persistent_fid = cfile->fid.persistent_fid;
406 parms->volatile_fid = cfile->fid.volatile_fid;
407 return SMB2_write(xid, parms, written, iov, nr_segs);
408 }
409
410 static int
smb2_set_file_size(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,__u64 size,bool set_alloc)411 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
412 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
413 {
414 __le64 eof = cpu_to_le64(size);
415 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
416 cfile->fid.volatile_fid, cfile->pid, &eof);
417 }
418
419 static int
smb2_query_dir_first(const unsigned int xid,struct cifs_tcon * tcon,const char * path,struct cifs_sb_info * cifs_sb,struct cifs_fid * fid,__u16 search_flags,struct cifs_search_info * srch_inf)420 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
421 const char *path, struct cifs_sb_info *cifs_sb,
422 struct cifs_fid *fid, __u16 search_flags,
423 struct cifs_search_info *srch_inf)
424 {
425 __le16 *utf16_path;
426 int rc;
427 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
428 __u64 persistent_fid, volatile_fid;
429
430 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
431 if (!utf16_path)
432 return -ENOMEM;
433
434 rc = SMB2_open(xid, tcon, utf16_path, &persistent_fid, &volatile_fid,
435 FILE_READ_ATTRIBUTES | FILE_READ_DATA, FILE_OPEN, 0, 0,
436 &oplock, NULL);
437 kfree(utf16_path);
438 if (rc) {
439 cifs_dbg(VFS, "open dir failed\n");
440 return rc;
441 }
442
443 srch_inf->entries_in_buffer = 0;
444 srch_inf->index_of_last_entry = 0;
445 fid->persistent_fid = persistent_fid;
446 fid->volatile_fid = volatile_fid;
447
448 rc = SMB2_query_directory(xid, tcon, persistent_fid, volatile_fid, 0,
449 srch_inf);
450 if (rc) {
451 cifs_dbg(VFS, "query directory failed\n");
452 SMB2_close(xid, tcon, persistent_fid, volatile_fid);
453 }
454 return rc;
455 }
456
457 static int
smb2_query_dir_next(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid,__u16 search_flags,struct cifs_search_info * srch_inf)458 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
459 struct cifs_fid *fid, __u16 search_flags,
460 struct cifs_search_info *srch_inf)
461 {
462 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
463 fid->volatile_fid, 0, srch_inf);
464 }
465
466 static int
smb2_close_dir(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)467 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
468 struct cifs_fid *fid)
469 {
470 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
471 }
472
473 /*
474 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
475 * the number of credits and return true. Otherwise - return false.
476 */
477 static bool
smb2_is_status_pending(char * buf,struct TCP_Server_Info * server,int length)478 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
479 {
480 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
481
482 if (hdr->Status != STATUS_PENDING)
483 return false;
484
485 if (!length) {
486 spin_lock(&server->req_lock);
487 server->credits += le16_to_cpu(hdr->CreditRequest);
488 spin_unlock(&server->req_lock);
489 wake_up(&server->request_q);
490 }
491
492 return true;
493 }
494
495 static int
smb2_oplock_response(struct cifs_tcon * tcon,struct cifs_fid * fid,struct cifsInodeInfo * cinode)496 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
497 struct cifsInodeInfo *cinode)
498 {
499 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
500 return SMB2_lease_break(0, tcon, cinode->lease_key,
501 smb2_get_lease_state(cinode));
502
503 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
504 fid->volatile_fid,
505 cinode->clientCanCacheRead ? 1 : 0);
506 }
507
508 static int
smb2_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct kstatfs * buf)509 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
510 struct kstatfs *buf)
511 {
512 int rc;
513 u64 persistent_fid, volatile_fid;
514 __le16 srch_path = 0; /* Null - open root of share */
515 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
516
517 rc = SMB2_open(xid, tcon, &srch_path, &persistent_fid, &volatile_fid,
518 FILE_READ_ATTRIBUTES, FILE_OPEN, 0, 0, &oplock, NULL);
519 if (rc)
520 return rc;
521 buf->f_type = SMB2_MAGIC_NUMBER;
522 rc = SMB2_QFS_info(xid, tcon, persistent_fid, volatile_fid, buf);
523 SMB2_close(xid, tcon, persistent_fid, volatile_fid);
524 return rc;
525 }
526
527 static bool
smb2_compare_fids(struct cifsFileInfo * ob1,struct cifsFileInfo * ob2)528 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
529 {
530 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
531 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
532 }
533
534 static int
smb2_mand_lock(const unsigned int xid,struct cifsFileInfo * cfile,__u64 offset,__u64 length,__u32 type,int lock,int unlock,bool wait)535 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
536 __u64 length, __u32 type, int lock, int unlock, bool wait)
537 {
538 if (unlock && !lock)
539 type = SMB2_LOCKFLAG_UNLOCK;
540 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
541 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
542 current->tgid, length, offset, type, wait);
543 }
544
545 static void
smb2_get_lease_key(struct inode * inode,struct cifs_fid * fid)546 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
547 {
548 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
549 }
550
551 static void
smb2_set_lease_key(struct inode * inode,struct cifs_fid * fid)552 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
553 {
554 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
555 }
556
557 static void
smb2_new_lease_key(struct cifs_fid * fid)558 smb2_new_lease_key(struct cifs_fid *fid)
559 {
560 get_random_bytes(fid->lease_key, SMB2_LEASE_KEY_SIZE);
561 }
562
563 struct smb_version_operations smb21_operations = {
564 .compare_fids = smb2_compare_fids,
565 .setup_request = smb2_setup_request,
566 .setup_async_request = smb2_setup_async_request,
567 .check_receive = smb2_check_receive,
568 .add_credits = smb2_add_credits,
569 .set_credits = smb2_set_credits,
570 .get_credits_field = smb2_get_credits_field,
571 .get_credits = smb2_get_credits,
572 .get_next_mid = smb2_get_next_mid,
573 .read_data_offset = smb2_read_data_offset,
574 .read_data_length = smb2_read_data_length,
575 .map_error = map_smb2_to_linux_error,
576 .find_mid = smb2_find_mid,
577 .check_message = smb2_check_message,
578 .dump_detail = smb2_dump_detail,
579 .clear_stats = smb2_clear_stats,
580 .print_stats = smb2_print_stats,
581 .is_oplock_break = smb2_is_valid_oplock_break,
582 .need_neg = smb2_need_neg,
583 .negotiate = smb2_negotiate,
584 .negotiate_wsize = smb2_negotiate_wsize,
585 .negotiate_rsize = smb2_negotiate_rsize,
586 .sess_setup = SMB2_sess_setup,
587 .logoff = SMB2_logoff,
588 .tree_connect = SMB2_tcon,
589 .tree_disconnect = SMB2_tdis,
590 .is_path_accessible = smb2_is_path_accessible,
591 .can_echo = smb2_can_echo,
592 .echo = SMB2_echo,
593 .query_path_info = smb2_query_path_info,
594 .get_srv_inum = smb2_get_srv_inum,
595 .query_file_info = smb2_query_file_info,
596 .set_path_size = smb2_set_path_size,
597 .set_file_size = smb2_set_file_size,
598 .set_file_info = smb2_set_file_info,
599 .mkdir = smb2_mkdir,
600 .mkdir_setinfo = smb2_mkdir_setinfo,
601 .rmdir = smb2_rmdir,
602 .unlink = smb2_unlink,
603 .rename = smb2_rename_path,
604 .create_hardlink = smb2_create_hardlink,
605 .open = smb2_open_file,
606 .set_fid = smb2_set_fid,
607 .close = smb2_close_file,
608 .flush = smb2_flush_file,
609 .async_readv = smb2_async_readv,
610 .async_writev = smb2_async_writev,
611 .sync_read = smb2_sync_read,
612 .sync_write = smb2_sync_write,
613 .query_dir_first = smb2_query_dir_first,
614 .query_dir_next = smb2_query_dir_next,
615 .close_dir = smb2_close_dir,
616 .calc_smb_size = smb2_calc_size,
617 .is_status_pending = smb2_is_status_pending,
618 .oplock_response = smb2_oplock_response,
619 .queryfs = smb2_queryfs,
620 .mand_lock = smb2_mand_lock,
621 .mand_unlock_range = smb2_unlock_range,
622 .push_mand_locks = smb2_push_mandatory_locks,
623 .get_lease_key = smb2_get_lease_key,
624 .set_lease_key = smb2_set_lease_key,
625 .new_lease_key = smb2_new_lease_key,
626 .calc_signature = smb2_calc_signature,
627 };
628
629
630 struct smb_version_operations smb30_operations = {
631 .compare_fids = smb2_compare_fids,
632 .setup_request = smb2_setup_request,
633 .setup_async_request = smb2_setup_async_request,
634 .check_receive = smb2_check_receive,
635 .add_credits = smb2_add_credits,
636 .set_credits = smb2_set_credits,
637 .get_credits_field = smb2_get_credits_field,
638 .get_credits = smb2_get_credits,
639 .get_next_mid = smb2_get_next_mid,
640 .read_data_offset = smb2_read_data_offset,
641 .read_data_length = smb2_read_data_length,
642 .map_error = map_smb2_to_linux_error,
643 .find_mid = smb2_find_mid,
644 .check_message = smb2_check_message,
645 .dump_detail = smb2_dump_detail,
646 .clear_stats = smb2_clear_stats,
647 .print_stats = smb2_print_stats,
648 .is_oplock_break = smb2_is_valid_oplock_break,
649 .need_neg = smb2_need_neg,
650 .negotiate = smb2_negotiate,
651 .negotiate_wsize = smb2_negotiate_wsize,
652 .negotiate_rsize = smb2_negotiate_rsize,
653 .sess_setup = SMB2_sess_setup,
654 .logoff = SMB2_logoff,
655 .tree_connect = SMB2_tcon,
656 .tree_disconnect = SMB2_tdis,
657 .is_path_accessible = smb2_is_path_accessible,
658 .can_echo = smb2_can_echo,
659 .echo = SMB2_echo,
660 .query_path_info = smb2_query_path_info,
661 .get_srv_inum = smb2_get_srv_inum,
662 .query_file_info = smb2_query_file_info,
663 .set_path_size = smb2_set_path_size,
664 .set_file_size = smb2_set_file_size,
665 .set_file_info = smb2_set_file_info,
666 .mkdir = smb2_mkdir,
667 .mkdir_setinfo = smb2_mkdir_setinfo,
668 .rmdir = smb2_rmdir,
669 .unlink = smb2_unlink,
670 .rename = smb2_rename_path,
671 .create_hardlink = smb2_create_hardlink,
672 .open = smb2_open_file,
673 .set_fid = smb2_set_fid,
674 .close = smb2_close_file,
675 .flush = smb2_flush_file,
676 .async_readv = smb2_async_readv,
677 .async_writev = smb2_async_writev,
678 .sync_read = smb2_sync_read,
679 .sync_write = smb2_sync_write,
680 .query_dir_first = smb2_query_dir_first,
681 .query_dir_next = smb2_query_dir_next,
682 .close_dir = smb2_close_dir,
683 .calc_smb_size = smb2_calc_size,
684 .is_status_pending = smb2_is_status_pending,
685 .oplock_response = smb2_oplock_response,
686 .queryfs = smb2_queryfs,
687 .mand_lock = smb2_mand_lock,
688 .mand_unlock_range = smb2_unlock_range,
689 .push_mand_locks = smb2_push_mandatory_locks,
690 .get_lease_key = smb2_get_lease_key,
691 .set_lease_key = smb2_set_lease_key,
692 .new_lease_key = smb2_new_lease_key,
693 .calc_signature = smb3_calc_signature,
694 };
695
696 struct smb_version_values smb20_values = {
697 .version_string = SMB20_VERSION_STRING,
698 .protocol_id = SMB20_PROT_ID,
699 .req_capabilities = 0, /* MBZ */
700 .large_lock_type = 0,
701 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
702 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
703 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
704 .header_size = sizeof(struct smb2_hdr),
705 .max_header_size = MAX_SMB2_HDR_SIZE,
706 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
707 .lock_cmd = SMB2_LOCK,
708 .cap_unix = 0,
709 .cap_nt_find = SMB2_NT_FIND,
710 .cap_large_files = SMB2_LARGE_FILES,
711 .oplock_read = SMB2_OPLOCK_LEVEL_II,
712 };
713
714 struct smb_version_values smb21_values = {
715 .version_string = SMB21_VERSION_STRING,
716 .protocol_id = SMB21_PROT_ID,
717 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
718 .large_lock_type = 0,
719 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
720 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
721 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
722 .header_size = sizeof(struct smb2_hdr),
723 .max_header_size = MAX_SMB2_HDR_SIZE,
724 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
725 .lock_cmd = SMB2_LOCK,
726 .cap_unix = 0,
727 .cap_nt_find = SMB2_NT_FIND,
728 .cap_large_files = SMB2_LARGE_FILES,
729 .oplock_read = SMB2_OPLOCK_LEVEL_II,
730 };
731
732 struct smb_version_values smb30_values = {
733 .version_string = SMB30_VERSION_STRING,
734 .protocol_id = SMB30_PROT_ID,
735 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU,
736 .large_lock_type = 0,
737 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
738 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
739 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
740 .header_size = sizeof(struct smb2_hdr),
741 .max_header_size = MAX_SMB2_HDR_SIZE,
742 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
743 .lock_cmd = SMB2_LOCK,
744 .cap_unix = 0,
745 .cap_nt_find = SMB2_NT_FIND,
746 .cap_large_files = SMB2_LARGE_FILES,
747 .oplock_read = SMB2_OPLOCK_LEVEL_II,
748 };
749