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
change_conf(struct TCP_Server_Info * server)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 if (enable_oplocks) {
54 server->oplocks = true;
55 server->oplock_credits = 1;
56 } else
57 server->oplocks = false;
58
59 server->echo_credits = 1;
60 }
61 server->credits -= server->echo_credits + server->oplock_credits;
62 return 0;
63 }
64
65 static void
smb2_add_credits(struct TCP_Server_Info * server,const unsigned int add,const int optype)66 smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
67 const int optype)
68 {
69 int *val, rc = 0;
70 spin_lock(&server->req_lock);
71 val = server->ops->get_credits_field(server, optype);
72 *val += add;
73 server->in_flight--;
74 if (server->in_flight == 0 && (optype & CIFS_OP_MASK) != CIFS_NEG_OP)
75 rc = change_conf(server);
76 /*
77 * Sometimes server returns 0 credits on oplock break ack - we need to
78 * rebalance credits in this case.
79 */
80 else if (server->in_flight > 0 && server->oplock_credits == 0 &&
81 server->oplocks) {
82 if (server->credits > 1) {
83 server->credits--;
84 server->oplock_credits++;
85 }
86 }
87 spin_unlock(&server->req_lock);
88 wake_up(&server->request_q);
89 if (rc)
90 cifs_reconnect(server);
91 }
92
93 static void
smb2_set_credits(struct TCP_Server_Info * server,const int val)94 smb2_set_credits(struct TCP_Server_Info *server, const int val)
95 {
96 spin_lock(&server->req_lock);
97 server->credits = val;
98 spin_unlock(&server->req_lock);
99 }
100
101 static int *
smb2_get_credits_field(struct TCP_Server_Info * server,const int optype)102 smb2_get_credits_field(struct TCP_Server_Info *server, const int optype)
103 {
104 switch (optype) {
105 case CIFS_ECHO_OP:
106 return &server->echo_credits;
107 case CIFS_OBREAK_OP:
108 return &server->oplock_credits;
109 default:
110 return &server->credits;
111 }
112 }
113
114 static unsigned int
smb2_get_credits(struct mid_q_entry * mid)115 smb2_get_credits(struct mid_q_entry *mid)
116 {
117 return le16_to_cpu(((struct smb2_hdr *)mid->resp_buf)->CreditRequest);
118 }
119
120 static int
smb2_wait_mtu_credits(struct TCP_Server_Info * server,unsigned int size,unsigned int * num,unsigned int * credits)121 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
122 unsigned int *num, unsigned int *credits)
123 {
124 int rc = 0;
125 unsigned int scredits;
126
127 spin_lock(&server->req_lock);
128 while (1) {
129 if (server->credits <= 0) {
130 spin_unlock(&server->req_lock);
131 cifs_num_waiters_inc(server);
132 rc = wait_event_killable(server->request_q,
133 has_credits(server, &server->credits));
134 cifs_num_waiters_dec(server);
135 if (rc)
136 return rc;
137 spin_lock(&server->req_lock);
138 } else {
139 if (server->tcpStatus == CifsExiting) {
140 spin_unlock(&server->req_lock);
141 return -ENOENT;
142 }
143
144 scredits = server->credits;
145 /* can deadlock with reopen */
146 if (scredits <= 8) {
147 *num = SMB2_MAX_BUFFER_SIZE;
148 *credits = 0;
149 break;
150 }
151
152 /* leave some credits for reopen and other ops */
153 scredits -= 8;
154 *num = min_t(unsigned int, size,
155 scredits * SMB2_MAX_BUFFER_SIZE);
156
157 *credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
158 server->credits -= *credits;
159 server->in_flight++;
160 break;
161 }
162 }
163 spin_unlock(&server->req_lock);
164 return rc;
165 }
166
167 static __u64
smb2_get_next_mid(struct TCP_Server_Info * server)168 smb2_get_next_mid(struct TCP_Server_Info *server)
169 {
170 __u64 mid;
171 /* for SMB2 we need the current value */
172 spin_lock(&GlobalMid_Lock);
173 mid = server->CurrentMid++;
174 spin_unlock(&GlobalMid_Lock);
175 return mid;
176 }
177
178 static struct mid_q_entry *
smb2_find_mid(struct TCP_Server_Info * server,char * buf)179 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
180 {
181 struct mid_q_entry *mid;
182 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
183 __u64 wire_mid = le64_to_cpu(hdr->MessageId);
184
185 spin_lock(&GlobalMid_Lock);
186 list_for_each_entry(mid, &server->pending_mid_q, qhead) {
187 if ((mid->mid == wire_mid) &&
188 (mid->mid_state == MID_REQUEST_SUBMITTED) &&
189 (mid->command == hdr->Command)) {
190 spin_unlock(&GlobalMid_Lock);
191 return mid;
192 }
193 }
194 spin_unlock(&GlobalMid_Lock);
195 return NULL;
196 }
197
198 static void
smb2_dump_detail(void * buf)199 smb2_dump_detail(void *buf)
200 {
201 #ifdef CONFIG_CIFS_DEBUG2
202 struct smb2_hdr *smb = (struct smb2_hdr *)buf;
203
204 cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
205 smb->Command, smb->Status, smb->Flags, smb->MessageId,
206 smb->ProcessId);
207 cifs_dbg(VFS, "smb buf %p len %u\n", smb, smb2_calc_size(smb));
208 #endif
209 }
210
211 static bool
smb2_need_neg(struct TCP_Server_Info * server)212 smb2_need_neg(struct TCP_Server_Info *server)
213 {
214 return server->max_read == 0;
215 }
216
217 static int
smb2_negotiate(const unsigned int xid,struct cifs_ses * ses)218 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
219 {
220 int rc;
221 ses->server->CurrentMid = 0;
222 rc = SMB2_negotiate(xid, ses);
223 /* BB we probably don't need to retry with modern servers */
224 if (rc == -EAGAIN)
225 rc = -EHOSTDOWN;
226 return rc;
227 }
228
229 static unsigned int
smb2_negotiate_wsize(struct cifs_tcon * tcon,struct smb_vol * volume_info)230 smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
231 {
232 struct TCP_Server_Info *server = tcon->ses->server;
233 unsigned int wsize;
234
235 /* start with specified wsize, or default */
236 wsize = volume_info->wsize ? volume_info->wsize : CIFS_DEFAULT_IOSIZE;
237 wsize = min_t(unsigned int, wsize, server->max_write);
238
239 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
240 wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE);
241
242 return wsize;
243 }
244
245 static unsigned int
smb2_negotiate_rsize(struct cifs_tcon * tcon,struct smb_vol * volume_info)246 smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *volume_info)
247 {
248 struct TCP_Server_Info *server = tcon->ses->server;
249 unsigned int rsize;
250
251 /* start with specified rsize, or default */
252 rsize = volume_info->rsize ? volume_info->rsize : CIFS_DEFAULT_IOSIZE;
253 rsize = min_t(unsigned int, rsize, server->max_read);
254
255 if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU))
256 rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE);
257
258 return rsize;
259 }
260
261 #ifdef CONFIG_CIFS_STATS2
262 static int
SMB3_request_interfaces(const unsigned int xid,struct cifs_tcon * tcon)263 SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
264 {
265 int rc;
266 unsigned int ret_data_len = 0;
267 struct network_interface_info_ioctl_rsp *out_buf;
268
269 rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
270 FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
271 NULL /* no data input */, 0 /* no data input */,
272 (char **)&out_buf, &ret_data_len);
273 if (rc != 0)
274 cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
275 else if (ret_data_len < sizeof(struct network_interface_info_ioctl_rsp)) {
276 cifs_dbg(VFS, "server returned bad net interface info buf\n");
277 rc = -EINVAL;
278 } else {
279 /* Dump info on first interface */
280 cifs_dbg(FYI, "Adapter Capability 0x%x\t",
281 le32_to_cpu(out_buf->Capability));
282 cifs_dbg(FYI, "Link Speed %lld\n",
283 le64_to_cpu(out_buf->LinkSpeed));
284 }
285 kfree(out_buf);
286 return rc;
287 }
288 #endif /* STATS2 */
289
290 static void
smb3_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon)291 smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
292 {
293 int rc;
294 __le16 srch_path = 0; /* Null - open root of share */
295 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
296 struct cifs_open_parms oparms;
297 struct cifs_fid fid;
298
299 oparms.tcon = tcon;
300 oparms.desired_access = FILE_READ_ATTRIBUTES;
301 oparms.disposition = FILE_OPEN;
302 oparms.create_options = 0;
303 oparms.fid = &fid;
304 oparms.reconnect = false;
305
306 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
307 if (rc)
308 return;
309
310 #ifdef CONFIG_CIFS_STATS2
311 SMB3_request_interfaces(xid, tcon);
312 #endif /* STATS2 */
313
314 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
315 FS_ATTRIBUTE_INFORMATION);
316 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
317 FS_DEVICE_INFORMATION);
318 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
319 FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */
320 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
321 return;
322 }
323
324 static void
smb2_qfs_tcon(const unsigned int xid,struct cifs_tcon * tcon)325 smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
326 {
327 int rc;
328 __le16 srch_path = 0; /* Null - open root of share */
329 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
330 struct cifs_open_parms oparms;
331 struct cifs_fid fid;
332
333 oparms.tcon = tcon;
334 oparms.desired_access = FILE_READ_ATTRIBUTES;
335 oparms.disposition = FILE_OPEN;
336 oparms.create_options = 0;
337 oparms.fid = &fid;
338 oparms.reconnect = false;
339
340 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
341 if (rc)
342 return;
343
344 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
345 FS_ATTRIBUTE_INFORMATION);
346 SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
347 FS_DEVICE_INFORMATION);
348 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
349 return;
350 }
351
352 static int
smb2_is_path_accessible(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_sb_info * cifs_sb,const char * full_path)353 smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon,
354 struct cifs_sb_info *cifs_sb, const char *full_path)
355 {
356 int rc;
357 __le16 *utf16_path;
358 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
359 struct cifs_open_parms oparms;
360 struct cifs_fid fid;
361
362 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
363 if (!utf16_path)
364 return -ENOMEM;
365
366 oparms.tcon = tcon;
367 oparms.desired_access = FILE_READ_ATTRIBUTES;
368 oparms.disposition = FILE_OPEN;
369 oparms.create_options = 0;
370 oparms.fid = &fid;
371 oparms.reconnect = false;
372
373 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
374 if (rc) {
375 kfree(utf16_path);
376 return rc;
377 }
378
379 rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
380 kfree(utf16_path);
381 return rc;
382 }
383
384 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)385 smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon,
386 struct cifs_sb_info *cifs_sb, const char *full_path,
387 u64 *uniqueid, FILE_ALL_INFO *data)
388 {
389 *uniqueid = le64_to_cpu(data->IndexNumber);
390 return 0;
391 }
392
393 static int
smb2_query_file_info(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid,FILE_ALL_INFO * data)394 smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon,
395 struct cifs_fid *fid, FILE_ALL_INFO *data)
396 {
397 int rc;
398 struct smb2_file_all_info *smb2_data;
399
400 smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
401 GFP_KERNEL);
402 if (smb2_data == NULL)
403 return -ENOMEM;
404
405 rc = SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid,
406 smb2_data);
407 if (!rc)
408 move_smb2_info_to_cifs(data, smb2_data);
409 kfree(smb2_data);
410 return rc;
411 }
412
413 static bool
smb2_can_echo(struct TCP_Server_Info * server)414 smb2_can_echo(struct TCP_Server_Info *server)
415 {
416 return server->echoes;
417 }
418
419 static void
smb2_clear_stats(struct cifs_tcon * tcon)420 smb2_clear_stats(struct cifs_tcon *tcon)
421 {
422 #ifdef CONFIG_CIFS_STATS
423 int i;
424 for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
425 atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
426 atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
427 }
428 #endif
429 }
430
431 static void
smb2_dump_share_caps(struct seq_file * m,struct cifs_tcon * tcon)432 smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon)
433 {
434 seq_puts(m, "\n\tShare Capabilities:");
435 if (tcon->capabilities & SMB2_SHARE_CAP_DFS)
436 seq_puts(m, " DFS,");
437 if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY)
438 seq_puts(m, " CONTINUOUS AVAILABILITY,");
439 if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT)
440 seq_puts(m, " SCALEOUT,");
441 if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER)
442 seq_puts(m, " CLUSTER,");
443 if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC)
444 seq_puts(m, " ASYMMETRIC,");
445 if (tcon->capabilities == 0)
446 seq_puts(m, " None");
447 if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE)
448 seq_puts(m, " Aligned,");
449 if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE)
450 seq_puts(m, " Partition Aligned,");
451 if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY)
452 seq_puts(m, " SSD,");
453 if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED)
454 seq_puts(m, " TRIM-support,");
455
456 seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags);
457 if (tcon->perf_sector_size)
458 seq_printf(m, "\tOptimal sector size: 0x%x",
459 tcon->perf_sector_size);
460 }
461
462 static void
smb2_print_stats(struct seq_file * m,struct cifs_tcon * tcon)463 smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon)
464 {
465 #ifdef CONFIG_CIFS_STATS
466 atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent;
467 atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed;
468 seq_printf(m, "\nNegotiates: %d sent %d failed",
469 atomic_read(&sent[SMB2_NEGOTIATE_HE]),
470 atomic_read(&failed[SMB2_NEGOTIATE_HE]));
471 seq_printf(m, "\nSessionSetups: %d sent %d failed",
472 atomic_read(&sent[SMB2_SESSION_SETUP_HE]),
473 atomic_read(&failed[SMB2_SESSION_SETUP_HE]));
474 seq_printf(m, "\nLogoffs: %d sent %d failed",
475 atomic_read(&sent[SMB2_LOGOFF_HE]),
476 atomic_read(&failed[SMB2_LOGOFF_HE]));
477 seq_printf(m, "\nTreeConnects: %d sent %d failed",
478 atomic_read(&sent[SMB2_TREE_CONNECT_HE]),
479 atomic_read(&failed[SMB2_TREE_CONNECT_HE]));
480 seq_printf(m, "\nTreeDisconnects: %d sent %d failed",
481 atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]),
482 atomic_read(&failed[SMB2_TREE_DISCONNECT_HE]));
483 seq_printf(m, "\nCreates: %d sent %d failed",
484 atomic_read(&sent[SMB2_CREATE_HE]),
485 atomic_read(&failed[SMB2_CREATE_HE]));
486 seq_printf(m, "\nCloses: %d sent %d failed",
487 atomic_read(&sent[SMB2_CLOSE_HE]),
488 atomic_read(&failed[SMB2_CLOSE_HE]));
489 seq_printf(m, "\nFlushes: %d sent %d failed",
490 atomic_read(&sent[SMB2_FLUSH_HE]),
491 atomic_read(&failed[SMB2_FLUSH_HE]));
492 seq_printf(m, "\nReads: %d sent %d failed",
493 atomic_read(&sent[SMB2_READ_HE]),
494 atomic_read(&failed[SMB2_READ_HE]));
495 seq_printf(m, "\nWrites: %d sent %d failed",
496 atomic_read(&sent[SMB2_WRITE_HE]),
497 atomic_read(&failed[SMB2_WRITE_HE]));
498 seq_printf(m, "\nLocks: %d sent %d failed",
499 atomic_read(&sent[SMB2_LOCK_HE]),
500 atomic_read(&failed[SMB2_LOCK_HE]));
501 seq_printf(m, "\nIOCTLs: %d sent %d failed",
502 atomic_read(&sent[SMB2_IOCTL_HE]),
503 atomic_read(&failed[SMB2_IOCTL_HE]));
504 seq_printf(m, "\nCancels: %d sent %d failed",
505 atomic_read(&sent[SMB2_CANCEL_HE]),
506 atomic_read(&failed[SMB2_CANCEL_HE]));
507 seq_printf(m, "\nEchos: %d sent %d failed",
508 atomic_read(&sent[SMB2_ECHO_HE]),
509 atomic_read(&failed[SMB2_ECHO_HE]));
510 seq_printf(m, "\nQueryDirectories: %d sent %d failed",
511 atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]),
512 atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE]));
513 seq_printf(m, "\nChangeNotifies: %d sent %d failed",
514 atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]),
515 atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE]));
516 seq_printf(m, "\nQueryInfos: %d sent %d failed",
517 atomic_read(&sent[SMB2_QUERY_INFO_HE]),
518 atomic_read(&failed[SMB2_QUERY_INFO_HE]));
519 seq_printf(m, "\nSetInfos: %d sent %d failed",
520 atomic_read(&sent[SMB2_SET_INFO_HE]),
521 atomic_read(&failed[SMB2_SET_INFO_HE]));
522 seq_printf(m, "\nOplockBreaks: %d sent %d failed",
523 atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]),
524 atomic_read(&failed[SMB2_OPLOCK_BREAK_HE]));
525 #endif
526 }
527
528 static void
smb2_set_fid(struct cifsFileInfo * cfile,struct cifs_fid * fid,__u32 oplock)529 smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock)
530 {
531 struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry));
532 struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server;
533
534 cfile->fid.persistent_fid = fid->persistent_fid;
535 cfile->fid.volatile_fid = fid->volatile_fid;
536 server->ops->set_oplock_level(cinode, oplock, fid->epoch,
537 &fid->purge_cache);
538 cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode);
539 memcpy(cfile->fid.create_guid, fid->create_guid, 16);
540 }
541
542 static void
smb2_close_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)543 smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon,
544 struct cifs_fid *fid)
545 {
546 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
547 }
548
549 static int
SMB2_request_res_key(const unsigned int xid,struct cifs_tcon * tcon,u64 persistent_fid,u64 volatile_fid,struct copychunk_ioctl * pcchunk)550 SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
551 u64 persistent_fid, u64 volatile_fid,
552 struct copychunk_ioctl *pcchunk)
553 {
554 int rc;
555 unsigned int ret_data_len;
556 struct resume_key_req *res_key;
557
558 rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
559 FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
560 NULL, 0 /* no input */,
561 (char **)&res_key, &ret_data_len);
562
563 if (rc) {
564 cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
565 goto req_res_key_exit;
566 }
567 if (ret_data_len < sizeof(struct resume_key_req)) {
568 cifs_dbg(VFS, "Invalid refcopy resume key length\n");
569 rc = -EINVAL;
570 goto req_res_key_exit;
571 }
572 memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE);
573
574 req_res_key_exit:
575 kfree(res_key);
576 return rc;
577 }
578
579 static int
smb2_clone_range(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)580 smb2_clone_range(const unsigned int xid,
581 struct cifsFileInfo *srcfile,
582 struct cifsFileInfo *trgtfile, u64 src_off,
583 u64 len, u64 dest_off)
584 {
585 int rc;
586 unsigned int ret_data_len;
587 struct copychunk_ioctl *pcchunk;
588 struct copychunk_ioctl_rsp *retbuf = NULL;
589 struct cifs_tcon *tcon;
590 int chunks_copied = 0;
591 bool chunk_sizes_updated = false;
592
593 pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL);
594
595 if (pcchunk == NULL)
596 return -ENOMEM;
597
598 cifs_dbg(FYI, "in smb2_clone_range - about to call request res key\n");
599 /* Request a key from the server to identify the source of the copy */
600 rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
601 srcfile->fid.persistent_fid,
602 srcfile->fid.volatile_fid, pcchunk);
603
604 /* Note: request_res_key sets res_key null only if rc !=0 */
605 if (rc)
606 goto cchunk_out;
607
608 /* For now array only one chunk long, will make more flexible later */
609 pcchunk->ChunkCount = cpu_to_le32(1);
610 pcchunk->Reserved = 0;
611 pcchunk->Reserved2 = 0;
612
613 tcon = tlink_tcon(trgtfile->tlink);
614
615 while (len > 0) {
616 pcchunk->SourceOffset = cpu_to_le64(src_off);
617 pcchunk->TargetOffset = cpu_to_le64(dest_off);
618 pcchunk->Length =
619 cpu_to_le32(min_t(u32, len, tcon->max_bytes_chunk));
620
621 /* Request server copy to target from src identified by key */
622 kfree(retbuf);
623 retbuf = NULL;
624 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
625 trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
626 true /* is_fsctl */, (char *)pcchunk,
627 sizeof(struct copychunk_ioctl), (char **)&retbuf,
628 &ret_data_len);
629 if (rc == 0) {
630 if (ret_data_len !=
631 sizeof(struct copychunk_ioctl_rsp)) {
632 cifs_dbg(VFS, "invalid cchunk response size\n");
633 rc = -EIO;
634 goto cchunk_out;
635 }
636 if (retbuf->TotalBytesWritten == 0) {
637 cifs_dbg(FYI, "no bytes copied\n");
638 rc = -EIO;
639 goto cchunk_out;
640 }
641 /*
642 * Check if server claimed to write more than we asked
643 */
644 if (le32_to_cpu(retbuf->TotalBytesWritten) >
645 le32_to_cpu(pcchunk->Length)) {
646 cifs_dbg(VFS, "invalid copy chunk response\n");
647 rc = -EIO;
648 goto cchunk_out;
649 }
650 if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
651 cifs_dbg(VFS, "invalid num chunks written\n");
652 rc = -EIO;
653 goto cchunk_out;
654 }
655 chunks_copied++;
656
657 src_off += le32_to_cpu(retbuf->TotalBytesWritten);
658 dest_off += le32_to_cpu(retbuf->TotalBytesWritten);
659 len -= le32_to_cpu(retbuf->TotalBytesWritten);
660
661 cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %d\n",
662 le32_to_cpu(retbuf->ChunksWritten),
663 le32_to_cpu(retbuf->ChunkBytesWritten),
664 le32_to_cpu(retbuf->TotalBytesWritten));
665 } else if (rc == -EINVAL) {
666 if (ret_data_len != sizeof(struct copychunk_ioctl_rsp))
667 goto cchunk_out;
668
669 cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n",
670 le32_to_cpu(retbuf->ChunksWritten),
671 le32_to_cpu(retbuf->ChunkBytesWritten),
672 le32_to_cpu(retbuf->TotalBytesWritten));
673
674 /*
675 * Check if this is the first request using these sizes,
676 * (ie check if copy succeed once with original sizes
677 * and check if the server gave us different sizes after
678 * we already updated max sizes on previous request).
679 * if not then why is the server returning an error now
680 */
681 if ((chunks_copied != 0) || chunk_sizes_updated)
682 goto cchunk_out;
683
684 /* Check that server is not asking us to grow size */
685 if (le32_to_cpu(retbuf->ChunkBytesWritten) <
686 tcon->max_bytes_chunk)
687 tcon->max_bytes_chunk =
688 le32_to_cpu(retbuf->ChunkBytesWritten);
689 else
690 goto cchunk_out; /* server gave us bogus size */
691
692 /* No need to change MaxChunks since already set to 1 */
693 chunk_sizes_updated = true;
694 } else
695 goto cchunk_out;
696 }
697
698 cchunk_out:
699 kfree(pcchunk);
700 kfree(retbuf);
701 return rc;
702 }
703
704 static int
smb2_flush_file(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)705 smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon,
706 struct cifs_fid *fid)
707 {
708 return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid);
709 }
710
711 static unsigned int
smb2_read_data_offset(char * buf)712 smb2_read_data_offset(char *buf)
713 {
714 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
715 return rsp->DataOffset;
716 }
717
718 static unsigned int
smb2_read_data_length(char * buf)719 smb2_read_data_length(char *buf)
720 {
721 struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
722 return le32_to_cpu(rsp->DataLength);
723 }
724
725
726 static int
smb2_sync_read(const unsigned int xid,struct cifs_fid * pfid,struct cifs_io_parms * parms,unsigned int * bytes_read,char ** buf,int * buf_type)727 smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid,
728 struct cifs_io_parms *parms, unsigned int *bytes_read,
729 char **buf, int *buf_type)
730 {
731 parms->persistent_fid = pfid->persistent_fid;
732 parms->volatile_fid = pfid->volatile_fid;
733 return SMB2_read(xid, parms, bytes_read, buf, buf_type);
734 }
735
736 static int
smb2_sync_write(const unsigned int xid,struct cifs_fid * pfid,struct cifs_io_parms * parms,unsigned int * written,struct kvec * iov,unsigned long nr_segs)737 smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid,
738 struct cifs_io_parms *parms, unsigned int *written,
739 struct kvec *iov, unsigned long nr_segs)
740 {
741
742 parms->persistent_fid = pfid->persistent_fid;
743 parms->volatile_fid = pfid->volatile_fid;
744 return SMB2_write(xid, parms, written, iov, nr_segs);
745 }
746
747 /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */
smb2_set_sparse(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,struct inode * inode,__u8 setsparse)748 static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
749 struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse)
750 {
751 struct cifsInodeInfo *cifsi;
752 int rc;
753
754 cifsi = CIFS_I(inode);
755
756 /* if file already sparse don't bother setting sparse again */
757 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse)
758 return true; /* already sparse */
759
760 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse)
761 return true; /* already not sparse */
762
763 /*
764 * Can't check for sparse support on share the usual way via the
765 * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share
766 * since Samba server doesn't set the flag on the share, yet
767 * supports the set sparse FSCTL and returns sparse correctly
768 * in the file attributes. If we fail setting sparse though we
769 * mark that server does not support sparse files for this share
770 * to avoid repeatedly sending the unsupported fsctl to server
771 * if the file is repeatedly extended.
772 */
773 if (tcon->broken_sparse_sup)
774 return false;
775
776 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
777 cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
778 true /* is_fctl */, &setsparse, 1, NULL, NULL);
779 if (rc) {
780 tcon->broken_sparse_sup = true;
781 cifs_dbg(FYI, "set sparse rc = %d\n", rc);
782 return false;
783 }
784
785 if (setsparse)
786 cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE;
787 else
788 cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE);
789
790 return true;
791 }
792
793 static int
smb2_set_file_size(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile,__u64 size,bool set_alloc)794 smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon,
795 struct cifsFileInfo *cfile, __u64 size, bool set_alloc)
796 {
797 __le64 eof = cpu_to_le64(size);
798 struct inode *inode;
799
800 /*
801 * If extending file more than one page make sparse. Many Linux fs
802 * make files sparse by default when extending via ftruncate
803 */
804 inode = d_inode(cfile->dentry);
805
806 if (!set_alloc && (size > inode->i_size + 8192)) {
807 __u8 set_sparse = 1;
808
809 /* whether set sparse succeeds or not, extend the file */
810 smb2_set_sparse(xid, tcon, cfile, inode, set_sparse);
811 }
812
813 return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
814 cfile->fid.volatile_fid, cfile->pid, &eof, false);
815 }
816
817 static int
smb2_duplicate_extents(const unsigned int xid,struct cifsFileInfo * srcfile,struct cifsFileInfo * trgtfile,u64 src_off,u64 len,u64 dest_off)818 smb2_duplicate_extents(const unsigned int xid,
819 struct cifsFileInfo *srcfile,
820 struct cifsFileInfo *trgtfile, u64 src_off,
821 u64 len, u64 dest_off)
822 {
823 int rc;
824 unsigned int ret_data_len;
825 struct duplicate_extents_to_file dup_ext_buf;
826 struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink);
827
828 /* server fileays advertise duplicate extent support with this flag */
829 if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) &
830 FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0)
831 return -EOPNOTSUPP;
832
833 dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid;
834 dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid;
835 dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
836 dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
837 dup_ext_buf.ByteCount = cpu_to_le64(len);
838 cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
839 src_off, dest_off, len);
840
841 rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
842 if (rc)
843 goto duplicate_extents_out;
844
845 rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
846 trgtfile->fid.volatile_fid,
847 FSCTL_DUPLICATE_EXTENTS_TO_FILE,
848 true /* is_fsctl */, (char *)&dup_ext_buf,
849 sizeof(struct duplicate_extents_to_file),
850 NULL,
851 &ret_data_len);
852
853 if (ret_data_len > 0)
854 cifs_dbg(FYI, "non-zero response length in duplicate extents");
855
856 duplicate_extents_out:
857 return rc;
858 }
859
860 static int
smb2_set_compression(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)861 smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
862 struct cifsFileInfo *cfile)
863 {
864 return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid,
865 cfile->fid.volatile_fid);
866 }
867
868 static int
smb3_set_integrity(const unsigned int xid,struct cifs_tcon * tcon,struct cifsFileInfo * cfile)869 smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
870 struct cifsFileInfo *cfile)
871 {
872 struct fsctl_set_integrity_information_req integr_info;
873 unsigned int ret_data_len;
874
875 integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED);
876 integr_info.Flags = 0;
877 integr_info.Reserved = 0;
878
879 return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
880 cfile->fid.volatile_fid,
881 FSCTL_SET_INTEGRITY_INFORMATION,
882 true /* is_fsctl */, (char *)&integr_info,
883 sizeof(struct fsctl_set_integrity_information_req),
884 NULL,
885 &ret_data_len);
886
887 }
888
889 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)890 smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon,
891 const char *path, struct cifs_sb_info *cifs_sb,
892 struct cifs_fid *fid, __u16 search_flags,
893 struct cifs_search_info *srch_inf)
894 {
895 __le16 *utf16_path;
896 int rc;
897 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
898 struct cifs_open_parms oparms;
899
900 utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
901 if (!utf16_path)
902 return -ENOMEM;
903
904 oparms.tcon = tcon;
905 oparms.desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA;
906 oparms.disposition = FILE_OPEN;
907 oparms.create_options = 0;
908 oparms.fid = fid;
909 oparms.reconnect = false;
910
911 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
912 kfree(utf16_path);
913 if (rc) {
914 cifs_dbg(FYI, "open dir failed rc=%d\n", rc);
915 return rc;
916 }
917
918 srch_inf->entries_in_buffer = 0;
919 srch_inf->index_of_last_entry = 2;
920
921 rc = SMB2_query_directory(xid, tcon, fid->persistent_fid,
922 fid->volatile_fid, 0, srch_inf);
923 if (rc) {
924 cifs_dbg(FYI, "query directory failed rc=%d\n", rc);
925 SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
926 }
927 return rc;
928 }
929
930 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)931 smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon,
932 struct cifs_fid *fid, __u16 search_flags,
933 struct cifs_search_info *srch_inf)
934 {
935 return SMB2_query_directory(xid, tcon, fid->persistent_fid,
936 fid->volatile_fid, 0, srch_inf);
937 }
938
939 static int
smb2_close_dir(const unsigned int xid,struct cifs_tcon * tcon,struct cifs_fid * fid)940 smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
941 struct cifs_fid *fid)
942 {
943 return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid);
944 }
945
946 /*
947 * If we negotiate SMB2 protocol and get STATUS_PENDING - update
948 * the number of credits and return true. Otherwise - return false.
949 */
950 static bool
smb2_is_status_pending(char * buf,struct TCP_Server_Info * server,int length)951 smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
952 {
953 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
954
955 if (hdr->Status != STATUS_PENDING)
956 return false;
957
958 if (!length) {
959 spin_lock(&server->req_lock);
960 server->credits += le16_to_cpu(hdr->CreditRequest);
961 spin_unlock(&server->req_lock);
962 wake_up(&server->request_q);
963 }
964
965 return true;
966 }
967
968 static bool
smb2_is_session_expired(char * buf)969 smb2_is_session_expired(char *buf)
970 {
971 struct smb2_hdr *hdr = (struct smb2_hdr *)buf;
972
973 if (hdr->Status != STATUS_NETWORK_SESSION_EXPIRED)
974 return false;
975
976 cifs_dbg(FYI, "Session expired\n");
977 return true;
978 }
979
980 static int
smb2_oplock_response(struct cifs_tcon * tcon,struct cifs_fid * fid,struct cifsInodeInfo * cinode)981 smb2_oplock_response(struct cifs_tcon *tcon, struct cifs_fid *fid,
982 struct cifsInodeInfo *cinode)
983 {
984 if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING)
985 return SMB2_lease_break(0, tcon, cinode->lease_key,
986 smb2_get_lease_state(cinode));
987
988 return SMB2_oplock_break(0, tcon, fid->persistent_fid,
989 fid->volatile_fid,
990 CIFS_CACHE_READ(cinode) ? 1 : 0);
991 }
992
993 static int
smb2_queryfs(const unsigned int xid,struct cifs_tcon * tcon,struct kstatfs * buf)994 smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
995 struct kstatfs *buf)
996 {
997 int rc;
998 __le16 srch_path = 0; /* Null - open root of share */
999 u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1000 struct cifs_open_parms oparms;
1001 struct cifs_fid fid;
1002
1003 oparms.tcon = tcon;
1004 oparms.desired_access = FILE_READ_ATTRIBUTES;
1005 oparms.disposition = FILE_OPEN;
1006 oparms.create_options = 0;
1007 oparms.fid = &fid;
1008 oparms.reconnect = false;
1009
1010 rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL);
1011 if (rc)
1012 return rc;
1013 buf->f_type = SMB2_MAGIC_NUMBER;
1014 rc = SMB2_QFS_info(xid, tcon, fid.persistent_fid, fid.volatile_fid,
1015 buf);
1016 SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
1017 return rc;
1018 }
1019
1020 static bool
smb2_compare_fids(struct cifsFileInfo * ob1,struct cifsFileInfo * ob2)1021 smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
1022 {
1023 return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
1024 ob1->fid.volatile_fid == ob2->fid.volatile_fid;
1025 }
1026
1027 static int
smb2_mand_lock(const unsigned int xid,struct cifsFileInfo * cfile,__u64 offset,__u64 length,__u32 type,int lock,int unlock,bool wait)1028 smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
1029 __u64 length, __u32 type, int lock, int unlock, bool wait)
1030 {
1031 if (unlock && !lock)
1032 type = SMB2_LOCKFLAG_UNLOCK;
1033 return SMB2_lock(xid, tlink_tcon(cfile->tlink),
1034 cfile->fid.persistent_fid, cfile->fid.volatile_fid,
1035 current->tgid, length, offset, type, wait);
1036 }
1037
1038 static void
smb2_get_lease_key(struct inode * inode,struct cifs_fid * fid)1039 smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid)
1040 {
1041 memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE);
1042 }
1043
1044 static void
smb2_set_lease_key(struct inode * inode,struct cifs_fid * fid)1045 smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid)
1046 {
1047 memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE);
1048 }
1049
1050 static void
smb2_new_lease_key(struct cifs_fid * fid)1051 smb2_new_lease_key(struct cifs_fid *fid)
1052 {
1053 generate_random_uuid(fid->lease_key);
1054 }
1055
1056 #define SMB2_SYMLINK_STRUCT_SIZE \
1057 (sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
1058
1059 static int
smb2_query_symlink(const unsigned int xid,struct cifs_tcon * tcon,const char * full_path,char ** target_path,struct cifs_sb_info * cifs_sb)1060 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
1061 const char *full_path, char **target_path,
1062 struct cifs_sb_info *cifs_sb)
1063 {
1064 int rc;
1065 __le16 *utf16_path;
1066 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
1067 struct cifs_open_parms oparms;
1068 struct cifs_fid fid;
1069 struct smb2_err_rsp *err_buf = NULL;
1070 struct smb2_symlink_err_rsp *symlink;
1071 unsigned int sub_len;
1072 unsigned int sub_offset;
1073 unsigned int print_len;
1074 unsigned int print_offset;
1075
1076 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
1077
1078 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
1079 if (!utf16_path)
1080 return -ENOMEM;
1081
1082 oparms.tcon = tcon;
1083 oparms.desired_access = FILE_READ_ATTRIBUTES;
1084 oparms.disposition = FILE_OPEN;
1085 oparms.create_options = 0;
1086 oparms.fid = &fid;
1087 oparms.reconnect = false;
1088
1089 rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_buf);
1090
1091 if (!rc || !err_buf) {
1092 kfree(utf16_path);
1093 return -ENOENT;
1094 }
1095
1096 if (le32_to_cpu(err_buf->ByteCount) < sizeof(struct smb2_symlink_err_rsp) ||
1097 get_rfc1002_length(err_buf) + 4 < SMB2_SYMLINK_STRUCT_SIZE) {
1098 kfree(utf16_path);
1099 return -ENOENT;
1100 }
1101
1102 /* open must fail on symlink - reset rc */
1103 rc = 0;
1104 symlink = (struct smb2_symlink_err_rsp *)err_buf->ErrorData;
1105 sub_len = le16_to_cpu(symlink->SubstituteNameLength);
1106 sub_offset = le16_to_cpu(symlink->SubstituteNameOffset);
1107 print_len = le16_to_cpu(symlink->PrintNameLength);
1108 print_offset = le16_to_cpu(symlink->PrintNameOffset);
1109
1110 if (get_rfc1002_length(err_buf) + 4 <
1111 SMB2_SYMLINK_STRUCT_SIZE + sub_offset + sub_len) {
1112 kfree(utf16_path);
1113 return -ENOENT;
1114 }
1115
1116 if (get_rfc1002_length(err_buf) + 4 <
1117 SMB2_SYMLINK_STRUCT_SIZE + print_offset + print_len) {
1118 kfree(utf16_path);
1119 return -ENOENT;
1120 }
1121
1122 *target_path = cifs_strndup_from_utf16(
1123 (char *)symlink->PathBuffer + sub_offset,
1124 sub_len, true, cifs_sb->local_nls);
1125 if (!(*target_path)) {
1126 kfree(utf16_path);
1127 return -ENOMEM;
1128 }
1129 convert_delimiter(*target_path, '/');
1130 cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
1131 kfree(utf16_path);
1132 return rc;
1133 }
1134
smb3_zero_range(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len,bool keep_size)1135 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
1136 loff_t offset, loff_t len, bool keep_size)
1137 {
1138 struct inode *inode;
1139 struct cifsInodeInfo *cifsi;
1140 struct cifsFileInfo *cfile = file->private_data;
1141 struct file_zero_data_information fsctl_buf;
1142 long rc;
1143 unsigned int xid;
1144
1145 xid = get_xid();
1146
1147 inode = d_inode(cfile->dentry);
1148 cifsi = CIFS_I(inode);
1149
1150 /*
1151 * We zero the range through ioctl, so we need remove the page caches
1152 * first, otherwise the data may be inconsistent with the server.
1153 */
1154 truncate_pagecache_range(inode, offset, offset + len - 1);
1155
1156 /* if file not oplocked can't be sure whether asking to extend size */
1157 if (!CIFS_CACHE_READ(cifsi))
1158 if (keep_size == false)
1159 return -EOPNOTSUPP;
1160
1161 /*
1162 * Must check if file sparse since fallocate -z (zero range) assumes
1163 * non-sparse allocation
1164 */
1165 if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE))
1166 return -EOPNOTSUPP;
1167
1168 /*
1169 * need to make sure we are not asked to extend the file since the SMB3
1170 * fsctl does not change the file size. In the future we could change
1171 * this to zero the first part of the range then set the file size
1172 * which for a non sparse file would zero the newly extended range
1173 */
1174 if (keep_size == false)
1175 if (i_size_read(inode) < offset + len)
1176 return -EOPNOTSUPP;
1177
1178 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1179
1180 fsctl_buf.FileOffset = cpu_to_le64(offset);
1181 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1182
1183 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1184 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1185 true /* is_fctl */, (char *)&fsctl_buf,
1186 sizeof(struct file_zero_data_information), NULL, NULL);
1187 free_xid(xid);
1188 return rc;
1189 }
1190
smb3_punch_hole(struct file * file,struct cifs_tcon * tcon,loff_t offset,loff_t len)1191 static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
1192 loff_t offset, loff_t len)
1193 {
1194 struct inode *inode;
1195 struct cifsInodeInfo *cifsi;
1196 struct cifsFileInfo *cfile = file->private_data;
1197 struct file_zero_data_information fsctl_buf;
1198 long rc;
1199 unsigned int xid;
1200 __u8 set_sparse = 1;
1201
1202 xid = get_xid();
1203
1204 inode = d_inode(cfile->dentry);
1205 cifsi = CIFS_I(inode);
1206
1207 /* Need to make file sparse, if not already, before freeing range. */
1208 /* Consider adding equivalent for compressed since it could also work */
1209 if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse))
1210 return -EOPNOTSUPP;
1211
1212 /*
1213 * We implement the punch hole through ioctl, so we need remove the page
1214 * caches first, otherwise the data may be inconsistent with the server.
1215 */
1216 truncate_pagecache_range(inode, offset, offset + len - 1);
1217
1218 cifs_dbg(FYI, "offset %lld len %lld", offset, len);
1219
1220 fsctl_buf.FileOffset = cpu_to_le64(offset);
1221 fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
1222
1223 rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
1224 cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
1225 true /* is_fctl */, (char *)&fsctl_buf,
1226 sizeof(struct file_zero_data_information), NULL, NULL);
1227 free_xid(xid);
1228 return rc;
1229 }
1230
smb3_simple_falloc(struct file * file,struct cifs_tcon * tcon,loff_t off,loff_t len,bool keep_size)1231 static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
1232 loff_t off, loff_t len, bool keep_size)
1233 {
1234 struct inode *inode;
1235 struct cifsInodeInfo *cifsi;
1236 struct cifsFileInfo *cfile = file->private_data;
1237 long rc = -EOPNOTSUPP;
1238 unsigned int xid;
1239
1240 xid = get_xid();
1241
1242 inode = d_inode(cfile->dentry);
1243 cifsi = CIFS_I(inode);
1244
1245 /* if file not oplocked can't be sure whether asking to extend size */
1246 if (!CIFS_CACHE_READ(cifsi))
1247 if (keep_size == false)
1248 return -EOPNOTSUPP;
1249
1250 /*
1251 * Files are non-sparse by default so falloc may be a no-op
1252 * Must check if file sparse. If not sparse, and not extending
1253 * then no need to do anything since file already allocated
1254 */
1255 if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) {
1256 if (keep_size == true)
1257 return 0;
1258 /* check if extending file */
1259 else if (i_size_read(inode) >= off + len)
1260 /* not extending file and already not sparse */
1261 return 0;
1262 /* BB: in future add else clause to extend file */
1263 else
1264 return -EOPNOTSUPP;
1265 }
1266
1267 if ((keep_size == true) || (i_size_read(inode) >= off + len)) {
1268 /*
1269 * Check if falloc starts within first few pages of file
1270 * and ends within a few pages of the end of file to
1271 * ensure that most of file is being forced to be
1272 * fallocated now. If so then setting whole file sparse
1273 * ie potentially making a few extra pages at the beginning
1274 * or end of the file non-sparse via set_sparse is harmless.
1275 */
1276 if ((off > 8192) || (off + len + 8192 < i_size_read(inode)))
1277 return -EOPNOTSUPP;
1278
1279 rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
1280 }
1281 /* BB: else ... in future add code to extend file and set sparse */
1282
1283
1284 free_xid(xid);
1285 return rc;
1286 }
1287
1288
smb3_fallocate(struct file * file,struct cifs_tcon * tcon,int mode,loff_t off,loff_t len)1289 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
1290 loff_t off, loff_t len)
1291 {
1292 /* KEEP_SIZE already checked for by do_fallocate */
1293 if (mode & FALLOC_FL_PUNCH_HOLE)
1294 return smb3_punch_hole(file, tcon, off, len);
1295 else if (mode & FALLOC_FL_ZERO_RANGE) {
1296 if (mode & FALLOC_FL_KEEP_SIZE)
1297 return smb3_zero_range(file, tcon, off, len, true);
1298 return smb3_zero_range(file, tcon, off, len, false);
1299 } else if (mode == FALLOC_FL_KEEP_SIZE)
1300 return smb3_simple_falloc(file, tcon, off, len, true);
1301 else if (mode == 0)
1302 return smb3_simple_falloc(file, tcon, off, len, false);
1303
1304 return -EOPNOTSUPP;
1305 }
1306
1307 static void
smb2_downgrade_oplock(struct TCP_Server_Info * server,struct cifsInodeInfo * cinode,bool set_level2)1308 smb2_downgrade_oplock(struct TCP_Server_Info *server,
1309 struct cifsInodeInfo *cinode, bool set_level2)
1310 {
1311 if (set_level2)
1312 server->ops->set_oplock_level(cinode, SMB2_OPLOCK_LEVEL_II,
1313 0, NULL);
1314 else
1315 server->ops->set_oplock_level(cinode, 0, 0, NULL);
1316 }
1317
1318 static void
smb2_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)1319 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1320 unsigned int epoch, bool *purge_cache)
1321 {
1322 oplock &= 0xFF;
1323 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1324 return;
1325 if (oplock == SMB2_OPLOCK_LEVEL_BATCH) {
1326 cinode->oplock = CIFS_CACHE_RHW_FLG;
1327 cifs_dbg(FYI, "Batch Oplock granted on inode %p\n",
1328 &cinode->vfs_inode);
1329 } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) {
1330 cinode->oplock = CIFS_CACHE_RW_FLG;
1331 cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n",
1332 &cinode->vfs_inode);
1333 } else if (oplock == SMB2_OPLOCK_LEVEL_II) {
1334 cinode->oplock = CIFS_CACHE_READ_FLG;
1335 cifs_dbg(FYI, "Level II Oplock granted on inode %p\n",
1336 &cinode->vfs_inode);
1337 } else
1338 cinode->oplock = 0;
1339 }
1340
1341 static void
smb21_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)1342 smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1343 unsigned int epoch, bool *purge_cache)
1344 {
1345 char message[5] = {0};
1346 unsigned int new_oplock = 0;
1347
1348 oplock &= 0xFF;
1349 if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
1350 return;
1351
1352 /* Check if the server granted an oplock rather than a lease */
1353 if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1354 return smb2_set_oplock_level(cinode, oplock, epoch,
1355 purge_cache);
1356
1357 if (oplock & SMB2_LEASE_READ_CACHING_HE) {
1358 new_oplock |= CIFS_CACHE_READ_FLG;
1359 strcat(message, "R");
1360 }
1361 if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
1362 new_oplock |= CIFS_CACHE_HANDLE_FLG;
1363 strcat(message, "H");
1364 }
1365 if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
1366 new_oplock |= CIFS_CACHE_WRITE_FLG;
1367 strcat(message, "W");
1368 }
1369 if (!new_oplock)
1370 strncpy(message, "None", sizeof(message));
1371
1372 cinode->oplock = new_oplock;
1373 cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
1374 &cinode->vfs_inode);
1375 }
1376
1377 static void
smb3_set_oplock_level(struct cifsInodeInfo * cinode,__u32 oplock,unsigned int epoch,bool * purge_cache)1378 smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
1379 unsigned int epoch, bool *purge_cache)
1380 {
1381 unsigned int old_oplock = cinode->oplock;
1382
1383 smb21_set_oplock_level(cinode, oplock, epoch, purge_cache);
1384
1385 if (purge_cache) {
1386 *purge_cache = false;
1387 if (old_oplock == CIFS_CACHE_READ_FLG) {
1388 if (cinode->oplock == CIFS_CACHE_READ_FLG &&
1389 (epoch - cinode->epoch > 0))
1390 *purge_cache = true;
1391 else if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1392 (epoch - cinode->epoch > 1))
1393 *purge_cache = true;
1394 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1395 (epoch - cinode->epoch > 1))
1396 *purge_cache = true;
1397 else if (cinode->oplock == 0 &&
1398 (epoch - cinode->epoch > 0))
1399 *purge_cache = true;
1400 } else if (old_oplock == CIFS_CACHE_RH_FLG) {
1401 if (cinode->oplock == CIFS_CACHE_RH_FLG &&
1402 (epoch - cinode->epoch > 0))
1403 *purge_cache = true;
1404 else if (cinode->oplock == CIFS_CACHE_RHW_FLG &&
1405 (epoch - cinode->epoch > 1))
1406 *purge_cache = true;
1407 }
1408 cinode->epoch = epoch;
1409 }
1410 }
1411
1412 static bool
smb2_is_read_op(__u32 oplock)1413 smb2_is_read_op(__u32 oplock)
1414 {
1415 return oplock == SMB2_OPLOCK_LEVEL_II;
1416 }
1417
1418 static bool
smb21_is_read_op(__u32 oplock)1419 smb21_is_read_op(__u32 oplock)
1420 {
1421 return (oplock & SMB2_LEASE_READ_CACHING_HE) &&
1422 !(oplock & SMB2_LEASE_WRITE_CACHING_HE);
1423 }
1424
1425 static __le32
map_oplock_to_lease(u8 oplock)1426 map_oplock_to_lease(u8 oplock)
1427 {
1428 if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE)
1429 return SMB2_LEASE_WRITE_CACHING | SMB2_LEASE_READ_CACHING;
1430 else if (oplock == SMB2_OPLOCK_LEVEL_II)
1431 return SMB2_LEASE_READ_CACHING;
1432 else if (oplock == SMB2_OPLOCK_LEVEL_BATCH)
1433 return SMB2_LEASE_HANDLE_CACHING | SMB2_LEASE_READ_CACHING |
1434 SMB2_LEASE_WRITE_CACHING;
1435 return 0;
1436 }
1437
1438 static char *
smb2_create_lease_buf(u8 * lease_key,u8 oplock)1439 smb2_create_lease_buf(u8 *lease_key, u8 oplock)
1440 {
1441 struct create_lease *buf;
1442
1443 buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL);
1444 if (!buf)
1445 return NULL;
1446
1447 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1448 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1449 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1450
1451 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1452 (struct create_lease, lcontext));
1453 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context));
1454 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1455 (struct create_lease, Name));
1456 buf->ccontext.NameLength = cpu_to_le16(4);
1457 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1458 buf->Name[0] = 'R';
1459 buf->Name[1] = 'q';
1460 buf->Name[2] = 'L';
1461 buf->Name[3] = 's';
1462 return (char *)buf;
1463 }
1464
1465 static char *
smb3_create_lease_buf(u8 * lease_key,u8 oplock)1466 smb3_create_lease_buf(u8 *lease_key, u8 oplock)
1467 {
1468 struct create_lease_v2 *buf;
1469
1470 buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL);
1471 if (!buf)
1472 return NULL;
1473
1474 buf->lcontext.LeaseKeyLow = cpu_to_le64(*((u64 *)lease_key));
1475 buf->lcontext.LeaseKeyHigh = cpu_to_le64(*((u64 *)(lease_key + 8)));
1476 buf->lcontext.LeaseState = map_oplock_to_lease(oplock);
1477
1478 buf->ccontext.DataOffset = cpu_to_le16(offsetof
1479 (struct create_lease_v2, lcontext));
1480 buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2));
1481 buf->ccontext.NameOffset = cpu_to_le16(offsetof
1482 (struct create_lease_v2, Name));
1483 buf->ccontext.NameLength = cpu_to_le16(4);
1484 /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
1485 buf->Name[0] = 'R';
1486 buf->Name[1] = 'q';
1487 buf->Name[2] = 'L';
1488 buf->Name[3] = 's';
1489 return (char *)buf;
1490 }
1491
1492 static __u8
smb2_parse_lease_buf(void * buf,unsigned int * epoch)1493 smb2_parse_lease_buf(void *buf, unsigned int *epoch)
1494 {
1495 struct create_lease *lc = (struct create_lease *)buf;
1496
1497 *epoch = 0; /* not used */
1498 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1499 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1500 return le32_to_cpu(lc->lcontext.LeaseState);
1501 }
1502
1503 static __u8
smb3_parse_lease_buf(void * buf,unsigned int * epoch)1504 smb3_parse_lease_buf(void *buf, unsigned int *epoch)
1505 {
1506 struct create_lease_v2 *lc = (struct create_lease_v2 *)buf;
1507
1508 *epoch = le16_to_cpu(lc->lcontext.Epoch);
1509 if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)
1510 return SMB2_OPLOCK_LEVEL_NOCHANGE;
1511 return le32_to_cpu(lc->lcontext.LeaseState);
1512 }
1513
1514 static unsigned int
smb2_wp_retry_size(struct inode * inode)1515 smb2_wp_retry_size(struct inode *inode)
1516 {
1517 return min_t(unsigned int, CIFS_SB(inode->i_sb)->wsize,
1518 SMB2_MAX_BUFFER_SIZE);
1519 }
1520
1521 static bool
smb2_dir_needs_close(struct cifsFileInfo * cfile)1522 smb2_dir_needs_close(struct cifsFileInfo *cfile)
1523 {
1524 return !cfile->invalidHandle;
1525 }
1526
1527 struct smb_version_operations smb20_operations = {
1528 .compare_fids = smb2_compare_fids,
1529 .setup_request = smb2_setup_request,
1530 .setup_async_request = smb2_setup_async_request,
1531 .check_receive = smb2_check_receive,
1532 .add_credits = smb2_add_credits,
1533 .set_credits = smb2_set_credits,
1534 .get_credits_field = smb2_get_credits_field,
1535 .get_credits = smb2_get_credits,
1536 .wait_mtu_credits = cifs_wait_mtu_credits,
1537 .get_next_mid = smb2_get_next_mid,
1538 .read_data_offset = smb2_read_data_offset,
1539 .read_data_length = smb2_read_data_length,
1540 .map_error = map_smb2_to_linux_error,
1541 .find_mid = smb2_find_mid,
1542 .check_message = smb2_check_message,
1543 .dump_detail = smb2_dump_detail,
1544 .clear_stats = smb2_clear_stats,
1545 .print_stats = smb2_print_stats,
1546 .is_oplock_break = smb2_is_valid_oplock_break,
1547 .handle_cancelled_mid = smb2_handle_cancelled_mid,
1548 .downgrade_oplock = smb2_downgrade_oplock,
1549 .need_neg = smb2_need_neg,
1550 .negotiate = smb2_negotiate,
1551 .negotiate_wsize = smb2_negotiate_wsize,
1552 .negotiate_rsize = smb2_negotiate_rsize,
1553 .sess_setup = SMB2_sess_setup,
1554 .logoff = SMB2_logoff,
1555 .tree_connect = SMB2_tcon,
1556 .tree_disconnect = SMB2_tdis,
1557 .qfs_tcon = smb2_qfs_tcon,
1558 .is_path_accessible = smb2_is_path_accessible,
1559 .can_echo = smb2_can_echo,
1560 .echo = SMB2_echo,
1561 .query_path_info = smb2_query_path_info,
1562 .get_srv_inum = smb2_get_srv_inum,
1563 .query_file_info = smb2_query_file_info,
1564 .set_path_size = smb2_set_path_size,
1565 .set_file_size = smb2_set_file_size,
1566 .set_file_info = smb2_set_file_info,
1567 .set_compression = smb2_set_compression,
1568 .mkdir = smb2_mkdir,
1569 .mkdir_setinfo = smb2_mkdir_setinfo,
1570 .rmdir = smb2_rmdir,
1571 .unlink = smb2_unlink,
1572 .rename = smb2_rename_path,
1573 .create_hardlink = smb2_create_hardlink,
1574 .query_symlink = smb2_query_symlink,
1575 .open = smb2_open_file,
1576 .set_fid = smb2_set_fid,
1577 .close = smb2_close_file,
1578 .flush = smb2_flush_file,
1579 .async_readv = smb2_async_readv,
1580 .async_writev = smb2_async_writev,
1581 .sync_read = smb2_sync_read,
1582 .sync_write = smb2_sync_write,
1583 .query_dir_first = smb2_query_dir_first,
1584 .query_dir_next = smb2_query_dir_next,
1585 .close_dir = smb2_close_dir,
1586 .calc_smb_size = smb2_calc_size,
1587 .is_status_pending = smb2_is_status_pending,
1588 .is_session_expired = smb2_is_session_expired,
1589 .oplock_response = smb2_oplock_response,
1590 .queryfs = smb2_queryfs,
1591 .mand_lock = smb2_mand_lock,
1592 .mand_unlock_range = smb2_unlock_range,
1593 .push_mand_locks = smb2_push_mandatory_locks,
1594 .get_lease_key = smb2_get_lease_key,
1595 .set_lease_key = smb2_set_lease_key,
1596 .new_lease_key = smb2_new_lease_key,
1597 .calc_signature = smb2_calc_signature,
1598 .is_read_op = smb2_is_read_op,
1599 .set_oplock_level = smb2_set_oplock_level,
1600 .create_lease_buf = smb2_create_lease_buf,
1601 .parse_lease_buf = smb2_parse_lease_buf,
1602 .clone_range = smb2_clone_range,
1603 .wp_retry_size = smb2_wp_retry_size,
1604 .dir_needs_close = smb2_dir_needs_close,
1605 };
1606
1607 struct smb_version_operations smb21_operations = {
1608 .compare_fids = smb2_compare_fids,
1609 .setup_request = smb2_setup_request,
1610 .setup_async_request = smb2_setup_async_request,
1611 .check_receive = smb2_check_receive,
1612 .add_credits = smb2_add_credits,
1613 .set_credits = smb2_set_credits,
1614 .get_credits_field = smb2_get_credits_field,
1615 .get_credits = smb2_get_credits,
1616 .wait_mtu_credits = smb2_wait_mtu_credits,
1617 .get_next_mid = smb2_get_next_mid,
1618 .read_data_offset = smb2_read_data_offset,
1619 .read_data_length = smb2_read_data_length,
1620 .map_error = map_smb2_to_linux_error,
1621 .find_mid = smb2_find_mid,
1622 .check_message = smb2_check_message,
1623 .dump_detail = smb2_dump_detail,
1624 .clear_stats = smb2_clear_stats,
1625 .print_stats = smb2_print_stats,
1626 .is_oplock_break = smb2_is_valid_oplock_break,
1627 .handle_cancelled_mid = smb2_handle_cancelled_mid,
1628 .downgrade_oplock = smb2_downgrade_oplock,
1629 .need_neg = smb2_need_neg,
1630 .negotiate = smb2_negotiate,
1631 .negotiate_wsize = smb2_negotiate_wsize,
1632 .negotiate_rsize = smb2_negotiate_rsize,
1633 .sess_setup = SMB2_sess_setup,
1634 .logoff = SMB2_logoff,
1635 .tree_connect = SMB2_tcon,
1636 .tree_disconnect = SMB2_tdis,
1637 .qfs_tcon = smb2_qfs_tcon,
1638 .is_path_accessible = smb2_is_path_accessible,
1639 .can_echo = smb2_can_echo,
1640 .echo = SMB2_echo,
1641 .query_path_info = smb2_query_path_info,
1642 .get_srv_inum = smb2_get_srv_inum,
1643 .query_file_info = smb2_query_file_info,
1644 .set_path_size = smb2_set_path_size,
1645 .set_file_size = smb2_set_file_size,
1646 .set_file_info = smb2_set_file_info,
1647 .set_compression = smb2_set_compression,
1648 .mkdir = smb2_mkdir,
1649 .mkdir_setinfo = smb2_mkdir_setinfo,
1650 .rmdir = smb2_rmdir,
1651 .unlink = smb2_unlink,
1652 .rename = smb2_rename_path,
1653 .create_hardlink = smb2_create_hardlink,
1654 .query_symlink = smb2_query_symlink,
1655 .query_mf_symlink = smb3_query_mf_symlink,
1656 .create_mf_symlink = smb3_create_mf_symlink,
1657 .open = smb2_open_file,
1658 .set_fid = smb2_set_fid,
1659 .close = smb2_close_file,
1660 .flush = smb2_flush_file,
1661 .async_readv = smb2_async_readv,
1662 .async_writev = smb2_async_writev,
1663 .sync_read = smb2_sync_read,
1664 .sync_write = smb2_sync_write,
1665 .query_dir_first = smb2_query_dir_first,
1666 .query_dir_next = smb2_query_dir_next,
1667 .close_dir = smb2_close_dir,
1668 .calc_smb_size = smb2_calc_size,
1669 .is_status_pending = smb2_is_status_pending,
1670 .is_session_expired = smb2_is_session_expired,
1671 .oplock_response = smb2_oplock_response,
1672 .queryfs = smb2_queryfs,
1673 .mand_lock = smb2_mand_lock,
1674 .mand_unlock_range = smb2_unlock_range,
1675 .push_mand_locks = smb2_push_mandatory_locks,
1676 .get_lease_key = smb2_get_lease_key,
1677 .set_lease_key = smb2_set_lease_key,
1678 .new_lease_key = smb2_new_lease_key,
1679 .calc_signature = smb2_calc_signature,
1680 .is_read_op = smb21_is_read_op,
1681 .set_oplock_level = smb21_set_oplock_level,
1682 .create_lease_buf = smb2_create_lease_buf,
1683 .parse_lease_buf = smb2_parse_lease_buf,
1684 .clone_range = smb2_clone_range,
1685 .wp_retry_size = smb2_wp_retry_size,
1686 .dir_needs_close = smb2_dir_needs_close,
1687 };
1688
1689 struct smb_version_operations smb30_operations = {
1690 .compare_fids = smb2_compare_fids,
1691 .setup_request = smb2_setup_request,
1692 .setup_async_request = smb2_setup_async_request,
1693 .check_receive = smb2_check_receive,
1694 .add_credits = smb2_add_credits,
1695 .set_credits = smb2_set_credits,
1696 .get_credits_field = smb2_get_credits_field,
1697 .get_credits = smb2_get_credits,
1698 .wait_mtu_credits = smb2_wait_mtu_credits,
1699 .get_next_mid = smb2_get_next_mid,
1700 .read_data_offset = smb2_read_data_offset,
1701 .read_data_length = smb2_read_data_length,
1702 .map_error = map_smb2_to_linux_error,
1703 .find_mid = smb2_find_mid,
1704 .check_message = smb2_check_message,
1705 .dump_detail = smb2_dump_detail,
1706 .clear_stats = smb2_clear_stats,
1707 .print_stats = smb2_print_stats,
1708 .dump_share_caps = smb2_dump_share_caps,
1709 .is_oplock_break = smb2_is_valid_oplock_break,
1710 .handle_cancelled_mid = smb2_handle_cancelled_mid,
1711 .downgrade_oplock = smb2_downgrade_oplock,
1712 .need_neg = smb2_need_neg,
1713 .negotiate = smb2_negotiate,
1714 .negotiate_wsize = smb2_negotiate_wsize,
1715 .negotiate_rsize = smb2_negotiate_rsize,
1716 .sess_setup = SMB2_sess_setup,
1717 .logoff = SMB2_logoff,
1718 .tree_connect = SMB2_tcon,
1719 .tree_disconnect = SMB2_tdis,
1720 .qfs_tcon = smb3_qfs_tcon,
1721 .is_path_accessible = smb2_is_path_accessible,
1722 .can_echo = smb2_can_echo,
1723 .echo = SMB2_echo,
1724 .query_path_info = smb2_query_path_info,
1725 .get_srv_inum = smb2_get_srv_inum,
1726 .query_file_info = smb2_query_file_info,
1727 .set_path_size = smb2_set_path_size,
1728 .set_file_size = smb2_set_file_size,
1729 .set_file_info = smb2_set_file_info,
1730 .set_compression = smb2_set_compression,
1731 .mkdir = smb2_mkdir,
1732 .mkdir_setinfo = smb2_mkdir_setinfo,
1733 .rmdir = smb2_rmdir,
1734 .unlink = smb2_unlink,
1735 .rename = smb2_rename_path,
1736 .create_hardlink = smb2_create_hardlink,
1737 .query_symlink = smb2_query_symlink,
1738 .query_mf_symlink = smb3_query_mf_symlink,
1739 .create_mf_symlink = smb3_create_mf_symlink,
1740 .open = smb2_open_file,
1741 .set_fid = smb2_set_fid,
1742 .close = smb2_close_file,
1743 .flush = smb2_flush_file,
1744 .async_readv = smb2_async_readv,
1745 .async_writev = smb2_async_writev,
1746 .sync_read = smb2_sync_read,
1747 .sync_write = smb2_sync_write,
1748 .query_dir_first = smb2_query_dir_first,
1749 .query_dir_next = smb2_query_dir_next,
1750 .close_dir = smb2_close_dir,
1751 .calc_smb_size = smb2_calc_size,
1752 .is_status_pending = smb2_is_status_pending,
1753 .is_session_expired = smb2_is_session_expired,
1754 .oplock_response = smb2_oplock_response,
1755 .queryfs = smb2_queryfs,
1756 .mand_lock = smb2_mand_lock,
1757 .mand_unlock_range = smb2_unlock_range,
1758 .push_mand_locks = smb2_push_mandatory_locks,
1759 .get_lease_key = smb2_get_lease_key,
1760 .set_lease_key = smb2_set_lease_key,
1761 .new_lease_key = smb2_new_lease_key,
1762 .generate_signingkey = generate_smb3signingkey,
1763 .calc_signature = smb3_calc_signature,
1764 .set_integrity = smb3_set_integrity,
1765 .is_read_op = smb21_is_read_op,
1766 .set_oplock_level = smb3_set_oplock_level,
1767 .create_lease_buf = smb3_create_lease_buf,
1768 .parse_lease_buf = smb3_parse_lease_buf,
1769 .clone_range = smb2_clone_range,
1770 .duplicate_extents = smb2_duplicate_extents,
1771 .validate_negotiate = smb3_validate_negotiate,
1772 .wp_retry_size = smb2_wp_retry_size,
1773 .dir_needs_close = smb2_dir_needs_close,
1774 .fallocate = smb3_fallocate,
1775 };
1776
1777 #ifdef CONFIG_CIFS_SMB311
1778 struct smb_version_operations smb311_operations = {
1779 .compare_fids = smb2_compare_fids,
1780 .setup_request = smb2_setup_request,
1781 .setup_async_request = smb2_setup_async_request,
1782 .check_receive = smb2_check_receive,
1783 .add_credits = smb2_add_credits,
1784 .set_credits = smb2_set_credits,
1785 .get_credits_field = smb2_get_credits_field,
1786 .get_credits = smb2_get_credits,
1787 .wait_mtu_credits = smb2_wait_mtu_credits,
1788 .get_next_mid = smb2_get_next_mid,
1789 .read_data_offset = smb2_read_data_offset,
1790 .read_data_length = smb2_read_data_length,
1791 .map_error = map_smb2_to_linux_error,
1792 .find_mid = smb2_find_mid,
1793 .check_message = smb2_check_message,
1794 .dump_detail = smb2_dump_detail,
1795 .clear_stats = smb2_clear_stats,
1796 .print_stats = smb2_print_stats,
1797 .dump_share_caps = smb2_dump_share_caps,
1798 .is_oplock_break = smb2_is_valid_oplock_break,
1799 .handle_cancelled_mid = smb2_handle_cancelled_mid,
1800 .downgrade_oplock = smb2_downgrade_oplock,
1801 .need_neg = smb2_need_neg,
1802 .negotiate = smb2_negotiate,
1803 .negotiate_wsize = smb2_negotiate_wsize,
1804 .negotiate_rsize = smb2_negotiate_rsize,
1805 .sess_setup = SMB2_sess_setup,
1806 .logoff = SMB2_logoff,
1807 .tree_connect = SMB2_tcon,
1808 .tree_disconnect = SMB2_tdis,
1809 .qfs_tcon = smb3_qfs_tcon,
1810 .is_path_accessible = smb2_is_path_accessible,
1811 .can_echo = smb2_can_echo,
1812 .echo = SMB2_echo,
1813 .query_path_info = smb2_query_path_info,
1814 .get_srv_inum = smb2_get_srv_inum,
1815 .query_file_info = smb2_query_file_info,
1816 .set_path_size = smb2_set_path_size,
1817 .set_file_size = smb2_set_file_size,
1818 .set_file_info = smb2_set_file_info,
1819 .set_compression = smb2_set_compression,
1820 .mkdir = smb2_mkdir,
1821 .mkdir_setinfo = smb2_mkdir_setinfo,
1822 .rmdir = smb2_rmdir,
1823 .unlink = smb2_unlink,
1824 .rename = smb2_rename_path,
1825 .create_hardlink = smb2_create_hardlink,
1826 .query_symlink = smb2_query_symlink,
1827 .query_mf_symlink = smb3_query_mf_symlink,
1828 .create_mf_symlink = smb3_create_mf_symlink,
1829 .open = smb2_open_file,
1830 .set_fid = smb2_set_fid,
1831 .close = smb2_close_file,
1832 .flush = smb2_flush_file,
1833 .async_readv = smb2_async_readv,
1834 .async_writev = smb2_async_writev,
1835 .sync_read = smb2_sync_read,
1836 .sync_write = smb2_sync_write,
1837 .query_dir_first = smb2_query_dir_first,
1838 .query_dir_next = smb2_query_dir_next,
1839 .close_dir = smb2_close_dir,
1840 .calc_smb_size = smb2_calc_size,
1841 .is_status_pending = smb2_is_status_pending,
1842 .is_session_expired = smb2_is_session_expired,
1843 .oplock_response = smb2_oplock_response,
1844 .queryfs = smb2_queryfs,
1845 .mand_lock = smb2_mand_lock,
1846 .mand_unlock_range = smb2_unlock_range,
1847 .push_mand_locks = smb2_push_mandatory_locks,
1848 .get_lease_key = smb2_get_lease_key,
1849 .set_lease_key = smb2_set_lease_key,
1850 .new_lease_key = smb2_new_lease_key,
1851 .generate_signingkey = generate_smb3signingkey,
1852 .calc_signature = smb3_calc_signature,
1853 .set_integrity = smb3_set_integrity,
1854 .is_read_op = smb21_is_read_op,
1855 .set_oplock_level = smb3_set_oplock_level,
1856 .create_lease_buf = smb3_create_lease_buf,
1857 .parse_lease_buf = smb3_parse_lease_buf,
1858 .clone_range = smb2_clone_range,
1859 .duplicate_extents = smb2_duplicate_extents,
1860 /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */
1861 .wp_retry_size = smb2_wp_retry_size,
1862 .dir_needs_close = smb2_dir_needs_close,
1863 .fallocate = smb3_fallocate,
1864 };
1865 #endif /* CIFS_SMB311 */
1866
1867 struct smb_version_values smb20_values = {
1868 .version_string = SMB20_VERSION_STRING,
1869 .protocol_id = SMB20_PROT_ID,
1870 .req_capabilities = 0, /* MBZ */
1871 .large_lock_type = 0,
1872 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1873 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1874 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1875 .header_size = sizeof(struct smb2_hdr),
1876 .max_header_size = MAX_SMB2_HDR_SIZE,
1877 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1878 .lock_cmd = SMB2_LOCK,
1879 .cap_unix = 0,
1880 .cap_nt_find = SMB2_NT_FIND,
1881 .cap_large_files = SMB2_LARGE_FILES,
1882 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1883 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1884 .create_lease_size = sizeof(struct create_lease),
1885 };
1886
1887 struct smb_version_values smb21_values = {
1888 .version_string = SMB21_VERSION_STRING,
1889 .protocol_id = SMB21_PROT_ID,
1890 .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */
1891 .large_lock_type = 0,
1892 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1893 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1894 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1895 .header_size = sizeof(struct smb2_hdr),
1896 .max_header_size = MAX_SMB2_HDR_SIZE,
1897 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1898 .lock_cmd = SMB2_LOCK,
1899 .cap_unix = 0,
1900 .cap_nt_find = SMB2_NT_FIND,
1901 .cap_large_files = SMB2_LARGE_FILES,
1902 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1903 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1904 .create_lease_size = sizeof(struct create_lease),
1905 };
1906
1907 struct smb_version_values smb30_values = {
1908 .version_string = SMB30_VERSION_STRING,
1909 .protocol_id = SMB30_PROT_ID,
1910 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1911 .large_lock_type = 0,
1912 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1913 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1914 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1915 .header_size = sizeof(struct smb2_hdr),
1916 .max_header_size = MAX_SMB2_HDR_SIZE,
1917 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1918 .lock_cmd = SMB2_LOCK,
1919 .cap_unix = 0,
1920 .cap_nt_find = SMB2_NT_FIND,
1921 .cap_large_files = SMB2_LARGE_FILES,
1922 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1923 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1924 .create_lease_size = sizeof(struct create_lease_v2),
1925 };
1926
1927 struct smb_version_values smb302_values = {
1928 .version_string = SMB302_VERSION_STRING,
1929 .protocol_id = SMB302_PROT_ID,
1930 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1931 .large_lock_type = 0,
1932 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1933 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1934 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1935 .header_size = sizeof(struct smb2_hdr),
1936 .max_header_size = MAX_SMB2_HDR_SIZE,
1937 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1938 .lock_cmd = SMB2_LOCK,
1939 .cap_unix = 0,
1940 .cap_nt_find = SMB2_NT_FIND,
1941 .cap_large_files = SMB2_LARGE_FILES,
1942 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1943 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1944 .create_lease_size = sizeof(struct create_lease_v2),
1945 };
1946
1947 #ifdef CONFIG_CIFS_SMB311
1948 struct smb_version_values smb311_values = {
1949 .version_string = SMB311_VERSION_STRING,
1950 .protocol_id = SMB311_PROT_ID,
1951 .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES,
1952 .large_lock_type = 0,
1953 .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
1954 .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
1955 .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
1956 .header_size = sizeof(struct smb2_hdr),
1957 .max_header_size = MAX_SMB2_HDR_SIZE,
1958 .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
1959 .lock_cmd = SMB2_LOCK,
1960 .cap_unix = 0,
1961 .cap_nt_find = SMB2_NT_FIND,
1962 .cap_large_files = SMB2_LARGE_FILES,
1963 .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED,
1964 .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED,
1965 .create_lease_size = sizeof(struct create_lease_v2),
1966 };
1967 #endif /* SMB311 */
1968