projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
video: fbdev: replace strnicmp with strncasecmp
[deliverable/linux.git] / fs / cifs / connect.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/cifs/connect.c
3 *
1080ef75 4 * Copyright (C) International Business Machines Corp., 2002,2011
1da177e4
LT		 5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
fb8c4b14 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1da177e4
LT		 20 */
21#include <linux/fs.h>
22#include <linux/net.h>
23#include <linux/string.h>
24#include <linux/list.h>
25#include <linux/wait.h>
5a0e3ad6 26#include <linux/slab.h>
1da177e4
LT		 27#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
b8643e1b 31#include <linux/delay.h>
f191401f 32#include <linux/completion.h>
aaf737ad 33#include <linux/kthread.h>
0ae0efad 34#include <linux/pagevec.h>
7dfb7103 35#include <linux/freezer.h>
5c2503a8 36#include <linux/namei.h>
1da177e4
LT		 37#include <asm/uaccess.h>
38#include <asm/processor.h>
50b64e3b 39#include <linux/inet.h>
143cb494 40#include <linux/module.h>
8a8798a5 41#include <keys/user-type.h>
0e2bedaa 42#include <net/ipv6.h>
8830d7e0
SP		 43#include <linux/parser.h>
44
1da177e4
LT		 45#include "cifspdu.h"
46#include "cifsglob.h"
47#include "cifsproto.h"
48#include "cifs_unicode.h"
49#include "cifs_debug.h"
50#include "cifs_fs_sb.h"
51#include "ntlmssp.h"
52#include "nterr.h"
53#include "rfc1002pdu.h"
488f1d2d 54#include "fscache.h"
1da177e4
LT		 55
56#define CIFS_PORT 445
57#define RFC1001_PORT 139
58
1da177e4
LT		 59extern mempool_t *cifs_req_poolp;
60
2de970ff 61/* FIXME: should these be tunable? */
9d002df4 62#define TLINK_ERROR_EXPIRE (1 * HZ)
2de970ff 63#define TLINK_IDLE_EXPIRE (600 * HZ)
9d002df4 64
8830d7e0
SP		 65enum {
66
67 /* Mount options that take no arguments */
68 Opt_user_xattr, Opt_nouser_xattr,
69 Opt_forceuid, Opt_noforceuid,
72bd481f 70 Opt_forcegid, Opt_noforcegid,
8830d7e0
SP		 71 Opt_noblocksend, Opt_noautotune,
72 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
73 Opt_mapchars, Opt_nomapchars, Opt_sfu,
74 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
75 Opt_noposixpaths, Opt_nounix,
76 Opt_nocase,
77 Opt_brl, Opt_nobrl,
78 Opt_forcemandatorylock, Opt_setuids,
79 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
80 Opt_nohard, Opt_nosoft,
81 Opt_nointr, Opt_intr,
82 Opt_nostrictsync, Opt_strictsync,
83 Opt_serverino, Opt_noserverino,
84 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
85 Opt_acl, Opt_noacl, Opt_locallease,
1b359204 86 Opt_sign, Opt_seal, Opt_noac,
8830d7e0 87 Opt_fsc, Opt_mfsymlinks,
a0b3df5c 88 Opt_multiuser, Opt_sloppy, Opt_nosharesock,
8830d7e0
SP		 89
90 /* Mount options which take numeric value */
91 Opt_backupuid, Opt_backupgid, Opt_uid,
92 Opt_cruid, Opt_gid, Opt_file_mode,
93 Opt_dirmode, Opt_port,
94 Opt_rsize, Opt_wsize, Opt_actimeo,
95
96 /* Mount options which take string value */
97 Opt_user, Opt_pass, Opt_ip,
73a999fa 98 Opt_domain, Opt_srcaddr, Opt_iocharset,
8830d7e0 99 Opt_netbiosname, Opt_servern,
23db65f5 100 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
8830d7e0
SP		 101
102 /* Mount options to be ignored */
103 Opt_ignore,
104
105 /* Options which could be blank */
106 Opt_blank_pass,
4fe9e963
SP		 107 Opt_blank_user,
108 Opt_blank_ip,
8830d7e0
SP		 109
110 Opt_err
111};
112
113static const match_table_t cifs_mount_option_tokens = {
114
115 { Opt_user_xattr, "user_xattr" },
116 { Opt_nouser_xattr, "nouser_xattr" },
117 { Opt_forceuid, "forceuid" },
118 { Opt_noforceuid, "noforceuid" },
72bd481f
JL		 119 { Opt_forcegid, "forcegid" },
120 { Opt_noforcegid, "noforcegid" },
8830d7e0
SP		 121 { Opt_noblocksend, "noblocksend" },
122 { Opt_noautotune, "noautotune" },
123 { Opt_hard, "hard" },
124 { Opt_soft, "soft" },
125 { Opt_perm, "perm" },
126 { Opt_noperm, "noperm" },
127 { Opt_mapchars, "mapchars" },
128 { Opt_nomapchars, "nomapchars" },
129 { Opt_sfu, "sfu" },
130 { Opt_nosfu, "nosfu" },
131 { Opt_nodfs, "nodfs" },
132 { Opt_posixpaths, "posixpaths" },
133 { Opt_noposixpaths, "noposixpaths" },
134 { Opt_nounix, "nounix" },
135 { Opt_nounix, "nolinux" },
136 { Opt_nocase, "nocase" },
137 { Opt_nocase, "ignorecase" },
138 { Opt_brl, "brl" },
139 { Opt_nobrl, "nobrl" },
140 { Opt_nobrl, "nolock" },
141 { Opt_forcemandatorylock, "forcemandatorylock" },
5cfdddcf 142 { Opt_forcemandatorylock, "forcemand" },
8830d7e0
SP		 143 { Opt_setuids, "setuids" },
144 { Opt_nosetuids, "nosetuids" },
145 { Opt_dynperm, "dynperm" },
146 { Opt_nodynperm, "nodynperm" },
147 { Opt_nohard, "nohard" },
148 { Opt_nosoft, "nosoft" },
149 { Opt_nointr, "nointr" },
150 { Opt_intr, "intr" },
151 { Opt_nostrictsync, "nostrictsync" },
152 { Opt_strictsync, "strictsync" },
153 { Opt_serverino, "serverino" },
154 { Opt_noserverino, "noserverino" },
155 { Opt_rwpidforward, "rwpidforward" },
156 { Opt_cifsacl, "cifsacl" },
157 { Opt_nocifsacl, "nocifsacl" },
158 { Opt_acl, "acl" },
159 { Opt_noacl, "noacl" },
160 { Opt_locallease, "locallease" },
161 { Opt_sign, "sign" },
162 { Opt_seal, "seal" },
8830d7e0
SP		 163 { Opt_noac, "noac" },
164 { Opt_fsc, "fsc" },
165 { Opt_mfsymlinks, "mfsymlinks" },
166 { Opt_multiuser, "multiuser" },
d8162558 167 { Opt_sloppy, "sloppy" },
a0b3df5c 168 { Opt_nosharesock, "nosharesock" },
8830d7e0
SP		 169
170 { Opt_backupuid, "backupuid=%s" },
171 { Opt_backupgid, "backupgid=%s" },
172 { Opt_uid, "uid=%s" },
173 { Opt_cruid, "cruid=%s" },
174 { Opt_gid, "gid=%s" },
175 { Opt_file_mode, "file_mode=%s" },
176 { Opt_dirmode, "dirmode=%s" },
177 { Opt_dirmode, "dir_mode=%s" },
178 { Opt_port, "port=%s" },
179 { Opt_rsize, "rsize=%s" },
180 { Opt_wsize, "wsize=%s" },
181 { Opt_actimeo, "actimeo=%s" },
182
4fe9e963
SP		 183 { Opt_blank_user, "user=" },
184 { Opt_blank_user, "username=" },
8830d7e0
SP		 185 { Opt_user, "user=%s" },
186 { Opt_user, "username=%s" },
187 { Opt_blank_pass, "pass=" },
3c15b4cf 188 { Opt_blank_pass, "password=" },
8830d7e0
SP		 189 { Opt_pass, "pass=%s" },
190 { Opt_pass, "password=%s" },
4fe9e963
SP		 191 { Opt_blank_ip, "ip=" },
192 { Opt_blank_ip, "addr=" },
8830d7e0
SP		 193 { Opt_ip, "ip=%s" },
194 { Opt_ip, "addr=%s" },
73a999fa
JL		 195 { Opt_ignore, "unc=%s" },
196 { Opt_ignore, "target=%s" },
197 { Opt_ignore, "path=%s" },
8830d7e0
SP		 198 { Opt_domain, "dom=%s" },
199 { Opt_domain, "domain=%s" },
200 { Opt_domain, "workgroup=%s" },
201 { Opt_srcaddr, "srcaddr=%s" },
73a999fa 202 { Opt_ignore, "prefixpath=%s" },
8830d7e0 203 { Opt_iocharset, "iocharset=%s" },
8830d7e0
SP		 204 { Opt_netbiosname, "netbiosname=%s" },
205 { Opt_servern, "servern=%s" },
206 { Opt_ver, "ver=%s" },
23db65f5 207 { Opt_vers, "vers=%s" },
8830d7e0 208 { Opt_sec, "sec=%s" },
15b6a473 209 { Opt_cache, "cache=%s" },
8830d7e0
SP		 210
211 { Opt_ignore, "cred" },
212 { Opt_ignore, "credentials" },
a557b976
JL		 213 { Opt_ignore, "cred=%s" },
214 { Opt_ignore, "credentials=%s" },
8830d7e0
SP		 215 { Opt_ignore, "guest" },
216 { Opt_ignore, "rw" },
217 { Opt_ignore, "ro" },
218 { Opt_ignore, "suid" },
219 { Opt_ignore, "nosuid" },
220 { Opt_ignore, "exec" },
221 { Opt_ignore, "noexec" },
222 { Opt_ignore, "nodev" },
223 { Opt_ignore, "noauto" },
224 { Opt_ignore, "dev" },
225 { Opt_ignore, "mand" },
226 { Opt_ignore, "nomand" },
227 { Opt_ignore, "_netdev" },
228
229 { Opt_err, NULL }
230};
231
232enum {
233 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
234 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
7659624f
JL		 235 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
236 Opt_sec_ntlmv2i, Opt_sec_lanman,
8830d7e0
SP		 237 Opt_sec_none,
238
239 Opt_sec_err
240};
241
242static const match_table_t cifs_secflavor_tokens = {
243 { Opt_sec_krb5, "krb5" },
244 { Opt_sec_krb5i, "krb5i" },
245 { Opt_sec_krb5p, "krb5p" },
246 { Opt_sec_ntlmsspi, "ntlmsspi" },
247 { Opt_sec_ntlmssp, "ntlmssp" },
248 { Opt_ntlm, "ntlm" },
249 { Opt_sec_ntlmi, "ntlmi" },
7659624f
JL		 250 { Opt_sec_ntlmv2, "nontlm" },
251 { Opt_sec_ntlmv2, "ntlmv2" },
8830d7e0 252 { Opt_sec_ntlmv2i, "ntlmv2i" },
8830d7e0
SP		 253 { Opt_sec_lanman, "lanman" },
254 { Opt_sec_none, "none" },
255
256 { Opt_sec_err, NULL }
257};
258
15b6a473
JL		 259/* cache flavors */
260enum {
261 Opt_cache_loose,
262 Opt_cache_strict,
263 Opt_cache_none,
264 Opt_cache_err
265};
266
267static const match_table_t cifs_cacheflavor_tokens = {
268 { Opt_cache_loose, "loose" },
269 { Opt_cache_strict, "strict" },
270 { Opt_cache_none, "none" },
271 { Opt_cache_err, NULL }
272};
273
23db65f5
JL		 274static const match_table_t cifs_smb_version_tokens = {
275 { Smb_1, SMB1_VERSION_STRING },
dd446b16 276 { Smb_20, SMB20_VERSION_STRING},
1080ef75 277 { Smb_21, SMB21_VERSION_STRING },
e4aa25e7 278 { Smb_30, SMB30_VERSION_STRING },
20b6d8b4 279 { Smb_302, SMB302_VERSION_STRING },
23db65f5
JL		 280};
281
a9f1b85e
PS		 282static int ip_connect(struct TCP_Server_Info *server);
283static int generic_ip_connect(struct TCP_Server_Info *server);
b647c35f 284static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
2de970ff 285static void cifs_prune_tlinks(struct work_struct *work);
b9bce2e9
JL		 286static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
287 const char *devname);
1da177e4 288
d5c5605c
JL		 289/*
290 * cifs tcp session reconnection
291 *
292 * mark tcp session as reconnecting so temporarily locked
293 * mark all smb sessions as reconnecting for tcp session
294 * reconnect tcp session
295 * wake up waiters on reconnection? - (not needed currently)
296 */
28ea5290 297int
1da177e4
LT		 298cifs_reconnect(struct TCP_Server_Info *server)
299{
300 int rc = 0;
f1987b44 301 struct list_head *tmp, *tmp2;
96daf2b0
SF		 302 struct cifs_ses *ses;
303 struct cifs_tcon *tcon;
fb8c4b14 304 struct mid_q_entry *mid_entry;
3c1105df 305 struct list_head retry_list;
50c2f753 306
1da177e4 307 spin_lock(&GlobalMid_Lock);
469ee614 308 if (server->tcpStatus == CifsExiting) {
fb8c4b14 309 /* the demux thread will exit normally
1da177e4
LT		 310 next time through the loop */
311 spin_unlock(&GlobalMid_Lock);
312 return rc;
313 } else
314 server->tcpStatus = CifsNeedReconnect;
315 spin_unlock(&GlobalMid_Lock);
316 server->maxBuf = 0;
aa24d1e9
PS		 317#ifdef CONFIG_CIFS_SMB2
318 server->max_read = 0;
319#endif
1da177e4 320
f96637be 321 cifs_dbg(FYI, "Reconnecting tcp session\n");
1da177e4
LT		 322
323 /* before reconnecting the tcp session, mark the smb session (uid)
324 and the tid bad so they are not used until reconnected */
f96637be
JP		 325 cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n",
326 __func__);
3f9bcca7 327 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 328 list_for_each(tmp, &server->smb_ses_list) {
96daf2b0 329 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
14fbf50d
JL		 330 ses->need_reconnect = true;
331 ses->ipc_tid = 0;
f1987b44 332 list_for_each(tmp2, &ses->tcon_list) {
96daf2b0 333 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
3b795210 334 tcon->need_reconnect = true;
1da177e4 335 }
1da177e4 336 }
3f9bcca7 337 spin_unlock(&cifs_tcp_ses_lock);
2b84a36c 338
1da177e4 339 /* do not want to be sending data on a socket we are freeing */
f96637be 340 cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
72ca545b 341 mutex_lock(&server->srv_mutex);
fb8c4b14 342 if (server->ssocket) {
f96637be
JP		 343 cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n",
344 server->ssocket->state, server->ssocket->flags);
91cf45f0 345 kernel_sock_shutdown(server->ssocket, SHUT_WR);
f96637be
JP		 346 cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n",
347 server->ssocket->state, server->ssocket->flags);
1da177e4
LT		 348 sock_release(server->ssocket);
349 server->ssocket = NULL;
350 }
5d0d2882
SP		 351 server->sequence_number = 0;
352 server->session_estab = false;
21e73393
SP		 353 kfree(server->session_key.response);
354 server->session_key.response = NULL;
355 server->session_key.len = 0;
fda35943 356 server->lstrp = jiffies;
2b84a36c 357 mutex_unlock(&server->srv_mutex);
1da177e4 358
2b84a36c 359 /* mark submitted MIDs for retry and issue callback */
3c1105df 360 INIT_LIST_HEAD(&retry_list);
f96637be 361 cifs_dbg(FYI, "%s: moving mids to private list\n", __func__);
1da177e4 362 spin_lock(&GlobalMid_Lock);
2b84a36c
JL		 363 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
364 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1
PS		 365 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
366 mid_entry->mid_state = MID_RETRY_NEEDED;
3c1105df
JL		 367 list_move(&mid_entry->qhead, &retry_list);
368 }
369 spin_unlock(&GlobalMid_Lock);
370
f96637be 371 cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
3c1105df
JL		 372 list_for_each_safe(tmp, tmp2, &retry_list) {
373 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
2b84a36c
JL		 374 list_del_init(&mid_entry->qhead);
375 mid_entry->callback(mid_entry);
1da177e4 376 }
1da177e4 377
7fdbaa1b 378 do {
6c3d8909 379 try_to_freeze();
a9f1b85e
PS		 380
381 /* we should try only the port we connected to before */
73e216a8 382 mutex_lock(&server->srv_mutex);
a9f1b85e 383 rc = generic_ip_connect(server);
fb8c4b14 384 if (rc) {
f96637be 385 cifs_dbg(FYI, "reconnect error %d\n", rc);
0cb766ae 386 msleep(3000);
1da177e4
LT		 387 } else {
388 atomic_inc(&tcpSesReconnectCount);
389 spin_lock(&GlobalMid_Lock);
469ee614 390 if (server->tcpStatus != CifsExiting)
fd88ce93 391 server->tcpStatus = CifsNeedNegotiate;
fb8c4b14 392 spin_unlock(&GlobalMid_Lock);
1da177e4 393 }
73e216a8 394 mutex_unlock(&server->srv_mutex);
7fdbaa1b 395 } while (server->tcpStatus == CifsNeedReconnect);
2b84a36c 396
1da177e4
LT		 397 return rc;
398}
399
c74093b6
JL		 400static void
401cifs_echo_request(struct work_struct *work)
402{
403 int rc;
404 struct TCP_Server_Info *server = container_of(work,
405 struct TCP_Server_Info, echo.work);
406
247ec9b4 407 /*
f6d76178
PS		 408 * We cannot send an echo if it is disabled or until the
409 * NEGOTIATE_PROTOCOL request is done, which is indicated by
410 * server->ops->need_neg() == true. Also, no need to ping if
411 * we got a response recently.
247ec9b4 412 */
286170aa 413 if (!server->ops->need_neg || server->ops->need_neg(server) ||
f6d76178 414 (server->ops->can_echo && !server->ops->can_echo(server)) ||
247ec9b4 415 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
c74093b6
JL		 416 goto requeue_echo;
417
f6d76178 418 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
c74093b6 419 if (rc)
f96637be
JP		 420 cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
421 server->hostname);
c74093b6
JL		 422
423requeue_echo:
da472fc8 424 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
c74093b6
JL		 425}
426
3d9c2472 427static bool
2a37ef94 428allocate_buffers(struct TCP_Server_Info *server)
3d9c2472 429{
2a37ef94
JL		 430 if (!server->bigbuf) {
431 server->bigbuf = (char *)cifs_buf_get();
432 if (!server->bigbuf) {
f96637be 433 cifs_dbg(VFS, "No memory for large SMB response\n");
3d9c2472
PS		 434 msleep(3000);
435 /* retry will check if exiting */
436 return false;
437 }
2a37ef94 438 } else if (server->large_buf) {
3d9c2472 439 /* we are reusing a dirty large buf, clear its start */
1887f601 440 memset(server->bigbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 441 }
442
2a37ef94
JL		 443 if (!server->smallbuf) {
444 server->smallbuf = (char *)cifs_small_buf_get();
445 if (!server->smallbuf) {
f96637be 446 cifs_dbg(VFS, "No memory for SMB response\n");
3d9c2472
PS		 447 msleep(1000);
448 /* retry will check if exiting */
449 return false;
450 }
451 /* beginning of smb buffer is cleared in our buf_get */
452 } else {
453 /* if existing small buf clear beginning */
1887f601 454 memset(server->smallbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 455 }
456
3d9c2472
PS		 457 return true;
458}
459
ba749e6d
JL		 460static bool
461server_unresponsive(struct TCP_Server_Info *server)
462{
6dae51a5
PS		 463 /*
464 * We need to wait 2 echo intervals to make sure we handle such
465 * situations right:
466 * 1s client sends a normal SMB request
467 * 2s client gets a response
468 * 30s echo workqueue job pops, and decides we got a response recently
469 * and don't need to send another
470 * ...
471 * 65s kernel_recvmsg times out, and we see that we haven't gotten
472 * a response in >60s.
473 */
474 if (server->tcpStatus == CifsGood &&
475 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
f96637be
JP		 476 cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n",
477 server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ);
ba749e6d
JL		 478 cifs_reconnect(server);
479 wake_up(&server->response_q);
480 return true;
481 }
482
483 return false;
484}
485
42c4dfc2
JL		 486/*
487 * kvec_array_init - clone a kvec array, and advance into it
488 * @new: pointer to memory for cloned array
489 * @iov: pointer to original array
490 * @nr_segs: number of members in original array
491 * @bytes: number of bytes to advance into the cloned array
492 *
493 * This function will copy the array provided in iov to a section of memory
494 * and advance the specified number of bytes into the new array. It returns
495 * the number of segments in the new array. "new" must be at least as big as
496 * the original iov array.
497 */
498static unsigned int
499kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
500 size_t bytes)
501{
502 size_t base = 0;
503
504 while (bytes || !iov->iov_len) {
505 int copy = min(bytes, iov->iov_len);
506
507 bytes -= copy;
508 base += copy;
509 if (iov->iov_len == base) {
510 iov++;
511 nr_segs--;
512 base = 0;
513 }
514 }
515 memcpy(new, iov, sizeof(*iov) * nr_segs);
516 new->iov_base += base;
517 new->iov_len -= base;
518 return nr_segs;
519}
520
1041e3f9
JL		 521static struct kvec *
522get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
e7015fb1 523{
1041e3f9
JL		 524 struct kvec *new_iov;
525
526 if (server->iov && nr_segs <= server->nr_iov)
527 return server->iov;
528
529 /* not big enough -- allocate a new one and release the old */
530 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
531 if (new_iov) {
532 kfree(server->iov);
533 server->iov = new_iov;
534 server->nr_iov = nr_segs;
535 }
536 return new_iov;
537}
538
e28bc5b1
JL		 539int
540cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
541 unsigned int nr_segs, unsigned int to_read)
e7015fb1 542{
a52c1eb7
JL		 543 int length = 0;
544 int total_read;
42c4dfc2 545 unsigned int segs;
e831e6cf 546 struct msghdr smb_msg;
42c4dfc2
JL		 547 struct kvec *iov;
548
1041e3f9 549 iov = get_server_iovec(server, nr_segs);
42c4dfc2
JL		 550 if (!iov)
551 return -ENOMEM;
e7015fb1 552
e831e6cf
JL		 553 smb_msg.msg_control = NULL;
554 smb_msg.msg_controllen = 0;
555
a52c1eb7 556 for (total_read = 0; to_read; total_read += length, to_read -= length) {
95edcff4
JL		 557 try_to_freeze();
558
ba749e6d 559 if (server_unresponsive(server)) {
3fabaa27 560 total_read = -ECONNABORTED;
ba749e6d
JL		 561 break;
562 }
563
42c4dfc2
JL		 564 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
565
566 length = kernel_recvmsg(server->ssocket, &smb_msg,
567 iov, segs, to_read, 0);
e7015fb1 568
e7015fb1 569 if (server->tcpStatus == CifsExiting) {
a52c1eb7 570 total_read = -ESHUTDOWN;
e7015fb1
PS		 571 break;
572 } else if (server->tcpStatus == CifsNeedReconnect) {
573 cifs_reconnect(server);
3fabaa27 574 total_read = -ECONNABORTED;
e7015fb1
PS		 575 break;
576 } else if (length == -ERESTARTSYS ||
577 length == -EAGAIN ||
578 length == -EINTR) {
579 /*
580 * Minimum sleep to prevent looping, allowing socket
581 * to clear and app threads to set tcpStatus
582 * CifsNeedReconnect if server hung.
583 */
584 usleep_range(1000, 2000);
585 length = 0;
a52c1eb7 586 continue;
e7015fb1 587 } else if (length <= 0) {
f96637be
JP		 588 cifs_dbg(FYI, "Received no data or error: expecting %d\n"
589 "got %d", to_read, length);
e7015fb1 590 cifs_reconnect(server);
3fabaa27 591 total_read = -ECONNABORTED;
e7015fb1
PS		 592 break;
593 }
594 }
a52c1eb7 595 return total_read;
e7015fb1 596}
e7015fb1 597
e28bc5b1
JL		 598int
599cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
600 unsigned int to_read)
42c4dfc2
JL		 601{
602 struct kvec iov;
603
604 iov.iov_base = buf;
605 iov.iov_len = to_read;
606
e28bc5b1 607 return cifs_readv_from_socket(server, &iov, 1, to_read);
e7015fb1
PS		 608}
609
98bac62c 610static bool
fe11e4cc 611is_smb_response(struct TCP_Server_Info *server, unsigned char type)
98bac62c 612{
98bac62c
PS		 613 /*
614 * The first byte big endian of the length field,
615 * is actually not part of the length but the type
616 * with the most common, zero, as regular data.
617 */
fe11e4cc
JL		 618 switch (type) {
619 case RFC1002_SESSION_MESSAGE:
620 /* Regular SMB response */
621 return true;
622 case RFC1002_SESSION_KEEP_ALIVE:
f96637be 623 cifs_dbg(FYI, "RFC 1002 session keep alive\n");
fe11e4cc
JL		 624 break;
625 case RFC1002_POSITIVE_SESSION_RESPONSE:
f96637be 626 cifs_dbg(FYI, "RFC 1002 positive session response\n");
fe11e4cc
JL		 627 break;
628 case RFC1002_NEGATIVE_SESSION_RESPONSE:
98bac62c
PS		 629 /*
630 * We get this from Windows 98 instead of an error on
631 * SMB negprot response.
632 */
f96637be 633 cifs_dbg(FYI, "RFC 1002 negative session response\n");
98bac62c
PS		 634 /* give server a second to clean up */
635 msleep(1000);
636 /*
637 * Always try 445 first on reconnect since we get NACK
638 * on some if we ever connected to port 139 (the NACK
639 * is since we do not begin with RFC1001 session
640 * initialize frame).
641 */
fe11e4cc 642 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
98bac62c
PS		 643 cifs_reconnect(server);
644 wake_up(&server->response_q);
fe11e4cc
JL		 645 break;
646 default:
f96637be 647 cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
98bac62c 648 cifs_reconnect(server);
98bac62c
PS		 649 }
650
fe11e4cc 651 return false;
98bac62c
PS		 652}
653
e28bc5b1
JL		 654void
655dequeue_mid(struct mid_q_entry *mid, bool malformed)
ea1f4502 656{
ad69bae1 657#ifdef CONFIG_CIFS_STATS2
ea1f4502 658 mid->when_received = jiffies;
ad69bae1 659#endif
ea1f4502
JL		 660 spin_lock(&GlobalMid_Lock);
661 if (!malformed)
7c9421e1 662 mid->mid_state = MID_RESPONSE_RECEIVED;
ea1f4502 663 else
7c9421e1 664 mid->mid_state = MID_RESPONSE_MALFORMED;
ea1f4502 665 list_del_init(&mid->qhead);
ad69bae1 666 spin_unlock(&GlobalMid_Lock);
ea1f4502 667}
ad69bae1 668
c8054ebd
JL		 669static void
670handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
d4e4854f 671 char *buf, int malformed)
ea1f4502 672{
316cf94a
PS		 673 if (server->ops->check_trans2 &&
674 server->ops->check_trans2(mid, server, buf, malformed))
c8054ebd 675 return;
ea1f4502 676 mid->resp_buf = buf;
7c9421e1 677 mid->large_buf = server->large_buf;
2a37ef94
JL		 678 /* Was previous buf put in mpx struct for multi-rsp? */
679 if (!mid->multiRsp) {
680 /* smb buffer will be freed by user thread */
681 if (server->large_buf)
682 server->bigbuf = NULL;
683 else
684 server->smallbuf = NULL;
685 }
ffc00e27 686 dequeue_mid(mid, malformed);
ad69bae1
PS		 687}
688
762dfd10
PS		 689static void clean_demultiplex_info(struct TCP_Server_Info *server)
690{
691 int length;
692
693 /* take it off the list, if it's not already */
694 spin_lock(&cifs_tcp_ses_lock);
695 list_del_init(&server->tcp_ses_list);
696 spin_unlock(&cifs_tcp_ses_lock);
697
698 spin_lock(&GlobalMid_Lock);
699 server->tcpStatus = CifsExiting;
700 spin_unlock(&GlobalMid_Lock);
701 wake_up_all(&server->response_q);
702
2d86dbc9 703 /* check if we have blocked requests that need to free */
fc40f9cf 704 spin_lock(&server->req_lock);
2d86dbc9
PS		 705 if (server->credits <= 0)
706 server->credits = 1;
fc40f9cf 707 spin_unlock(&server->req_lock);
762dfd10
PS		 708 /*
709 * Although there should not be any requests blocked on this queue it
710 * can not hurt to be paranoid and try to wake up requests that may
711 * haven been blocked when more than 50 at time were on the wire to the
712 * same server - they now will see the session is in exit state and get
713 * out of SendReceive.
714 */
715 wake_up_all(&server->request_q);
716 /* give those requests time to exit */
717 msleep(125);
718
719 if (server->ssocket) {
720 sock_release(server->ssocket);
721 server->ssocket = NULL;
722 }
723
724 if (!list_empty(&server->pending_mid_q)) {
725 struct list_head dispose_list;
726 struct mid_q_entry *mid_entry;
727 struct list_head *tmp, *tmp2;
728
729 INIT_LIST_HEAD(&dispose_list);
730 spin_lock(&GlobalMid_Lock);
731 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
732 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
f96637be 733 cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid);
7c9421e1 734 mid_entry->mid_state = MID_SHUTDOWN;
762dfd10
PS		 735 list_move(&mid_entry->qhead, &dispose_list);
736 }
737 spin_unlock(&GlobalMid_Lock);
738
739 /* now walk dispose list and issue callbacks */
740 list_for_each_safe(tmp, tmp2, &dispose_list) {
741 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
f96637be 742 cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid);
762dfd10
PS		 743 list_del_init(&mid_entry->qhead);
744 mid_entry->callback(mid_entry);
745 }
746 /* 1/8th of sec is more than enough time for them to exit */
747 msleep(125);
748 }
749
750 if (!list_empty(&server->pending_mid_q)) {
751 /*
752 * mpx threads have not exited yet give them at least the smb
753 * send timeout time for long ops.
754 *
755 * Due to delays on oplock break requests, we need to wait at
756 * least 45 seconds before giving up on a request getting a
757 * response and going ahead and killing cifsd.
758 */
f96637be 759 cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
762dfd10
PS		 760 msleep(46000);
761 /*
762 * If threads still have not exited they are probably never
763 * coming home not much else we can do but free the memory.
764 */
765 }
766
767 kfree(server->hostname);
1041e3f9 768 kfree(server->iov);
762dfd10
PS		 769 kfree(server);
770
771 length = atomic_dec_return(&tcpSesAllocCount);
772 if (length > 0)
773 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
774 GFP_KERNEL);
775}
776
e9097ab4
JL		 777static int
778standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
779{
780 int length;
781 char *buf = server->smallbuf;
d4e4854f 782 unsigned int pdu_length = get_rfc1002_length(buf);
e9097ab4
JL		 783
784 /* make sure this will fit in a large buffer */
1887f601 785 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
f96637be 786 cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
e9097ab4
JL		 787 cifs_reconnect(server);
788 wake_up(&server->response_q);
3fabaa27 789 return -ECONNABORTED;
e9097ab4
JL		 790 }
791
792 /* switch to large buffer if too big for a small one */
793 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
794 server->large_buf = true;
d4e4854f 795 memcpy(server->bigbuf, buf, server->total_read);
e9097ab4 796 buf = server->bigbuf;
e9097ab4
JL		 797 }
798
799 /* now read the rest */
1887f601
PS		 800 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
801 pdu_length - HEADER_SIZE(server) + 1 + 4);
e9097ab4
JL		 802 if (length < 0)
803 return length;
804 server->total_read += length;
805
d4e4854f 806 dump_smb(buf, server->total_read);
e9097ab4
JL		 807
808 /*
809 * We know that we received enough to get to the MID as we
810 * checked the pdu_length earlier. Now check to see
811 * if the rest of the header is OK. We borrow the length
812 * var for the rest of the loop to avoid a new stack var.
813 *
814 * 48 bytes is enough to display the header and a little bit
815 * into the payload for debugging purposes.
816 */
8aa26f3e 817 length = server->ops->check_message(buf, server->total_read);
e9097ab4
JL		 818 if (length != 0)
819 cifs_dump_mem("Bad SMB: ", buf,
820 min_t(unsigned int, server->total_read, 48));
821
2e44b288
PS		 822 if (server->ops->is_status_pending &&
823 server->ops->is_status_pending(buf, server, length))
824 return -1;
825
ff4fa4a2
JL		 826 if (!mid)
827 return length;
e9097ab4 828
d4e4854f 829 handle_mid(mid, server, buf, length);
ff4fa4a2 830 return 0;
e9097ab4
JL		 831}
832
1da177e4 833static int
7c97c200 834cifs_demultiplex_thread(void *p)
1da177e4
LT		 835{
836 int length;
7c97c200 837 struct TCP_Server_Info *server = p;
2a37ef94
JL		 838 unsigned int pdu_length;
839 char *buf = NULL;
a5c3e1c7 840 struct task_struct *task_to_wake = NULL;
1da177e4 841 struct mid_q_entry *mid_entry;
1da177e4 842
1da177e4 843 current->flags |= PF_MEMALLOC;
f96637be 844 cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
93d0ec85
JL		 845
846 length = atomic_inc_return(&tcpSesAllocCount);
847 if (length > 1)
26f57364
SF		 848 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
849 GFP_KERNEL);
1da177e4 850
83144186 851 set_freezable();
469ee614 852 while (server->tcpStatus != CifsExiting) {
ede1327e
SF		 853 if (try_to_freeze())
854 continue;
b8643e1b 855
2a37ef94 856 if (!allocate_buffers(server))
3d9c2472 857 continue;
b8643e1b 858
2a37ef94 859 server->large_buf = false;
2a37ef94 860 buf = server->smallbuf;
f01d5e14 861 pdu_length = 4; /* enough to get RFC1001 header */
fda35943 862
e28bc5b1 863 length = cifs_read_from_socket(server, buf, pdu_length);
a52c1eb7 864 if (length < 0)
1da177e4 865 continue;
2a37ef94 866 server->total_read = length;
1da177e4 867
98bac62c
PS		 868 /*
869 * The right amount was read from socket - 4 bytes,
870 * so we can now interpret the length field.
871 */
d4e4854f 872 pdu_length = get_rfc1002_length(buf);
70ca734a 873
f96637be 874 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
fe11e4cc 875 if (!is_smb_response(server, buf[0]))
fb8c4b14 876 continue;
e4eb295d 877
89482a56 878 /* make sure we have enough to get to the MID */
1887f601 879 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
f96637be
JP		 880 cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
881 pdu_length);
89482a56
JL		 882 cifs_reconnect(server);
883 wake_up(&server->response_q);
884 continue;
e4eb295d 885 }
e7015fb1 886
89482a56 887 /* read down to the MID */
e28bc5b1 888 length = cifs_read_from_socket(server, buf + 4,
1887f601 889 HEADER_SIZE(server) - 1 - 4);
89482a56 890 if (length < 0)
e4eb295d 891 continue;
2a37ef94 892 server->total_read += length;
1da177e4 893
8aa26f3e 894 mid_entry = server->ops->find_mid(server, buf);
50c2f753 895
44d22d84
JL		 896 if (!mid_entry || !mid_entry->receive)
897 length = standard_receive3(server, mid_entry);
898 else
899 length = mid_entry->receive(server, mid_entry);
71823baf 900
e9097ab4 901 if (length < 0)
fe11e4cc 902 continue;
1da177e4 903
d4e4854f 904 if (server->large_buf)
2a37ef94 905 buf = server->bigbuf;
fda35943 906
fda35943 907 server->lstrp = jiffies;
2b84a36c 908 if (mid_entry != NULL) {
2a37ef94
JL		 909 if (!mid_entry->multiRsp || mid_entry->multiEnd)
910 mid_entry->callback(mid_entry);
7f0adb53
PS		 911 } else if (!server->ops->is_oplock_break ||
912 !server->ops->is_oplock_break(buf, server)) {
f96637be
JP		 913 cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
914 atomic_read(&midCount));
1887f601
PS		 915 cifs_dump_mem("Received Data is: ", buf,
916 HEADER_SIZE(server));
3979877e 917#ifdef CONFIG_CIFS_DEBUG2
7f0adb53
PS		 918 if (server->ops->dump_detail)
919 server->ops->dump_detail(buf);
3979877e
SF		 920 cifs_dump_mids(server);
921#endif /* CIFS_DEBUG2 */
50c2f753 922
e4eb295d
SF		 923 }
924 } /* end while !EXITING */
925
fd62cb7e 926 /* buffer usually freed in free_mid - need to free it here on exit */
2a37ef94
JL		 927 cifs_buf_release(server->bigbuf);
928 if (server->smallbuf) /* no sense logging a debug message if NULL */
929 cifs_small_buf_release(server->smallbuf);
1da177e4 930
a5c3e1c7 931 task_to_wake = xchg(&server->tsk, NULL);
762dfd10 932 clean_demultiplex_info(server);
a5c3e1c7
SF		 933
934 /* if server->tsk was NULL then wait for a signal before exiting */
935 if (!task_to_wake) {
936 set_current_state(TASK_INTERRUPTIBLE);
937 while (!signal_pending(current)) {
938 schedule();
939 set_current_state(TASK_INTERRUPTIBLE);
940 }
941 set_current_state(TASK_RUNNING);
942 }
943
0468a2cf 944 module_put_and_exit(0);
1da177e4
LT		 945}
946
c359cf3c
JL		 947/* extract the host portion of the UNC string */
948static char *
949extract_hostname(const char *unc)
950{
951 const char *src;
952 char *dst, *delim;
953 unsigned int len;
954
955 /* skip double chars at beginning of string */
956 /* BB: check validity of these bytes? */
957 src = unc + 2;
958
959 /* delimiter between hostname and sharename is always '\\' now */
960 delim = strchr(src, '\\');
961 if (!delim)
962 return ERR_PTR(-EINVAL);
963
964 len = delim - src;
965 dst = kmalloc((len + 1), GFP_KERNEL);
966 if (dst == NULL)
967 return ERR_PTR(-ENOMEM);
968
969 memcpy(dst, src, len);
970 dst[len] = '\0';
971
972 return dst;
973}
974
8830d7e0
SP		 975static int get_option_ul(substring_t args[], unsigned long *option)
976{
977 int rc;
978 char *string;
979
980 string = match_strdup(args);
981 if (string == NULL)
982 return -ENOMEM;
bfa890a3 983 rc = kstrtoul(string, 0, option);
8830d7e0
SP		 984 kfree(string);
985
986 return rc;
987}
988
3da46565
EB		 989static int get_option_uid(substring_t args[], kuid_t *result)
990{
991 unsigned long value;
992 kuid_t uid;
993 int rc;
994
995 rc = get_option_ul(args, &value);
996 if (rc)
997 return rc;
998
999 uid = make_kuid(current_user_ns(), value);
1000 if (!uid_valid(uid))
1001 return -EINVAL;
1002
1003 *result = uid;
1004 return 0;
1005}
1006
1007static int get_option_gid(substring_t args[], kgid_t *result)
1008{
1009 unsigned long value;
1010 kgid_t gid;
1011 int rc;
1012
1013 rc = get_option_ul(args, &value);
1014 if (rc)
1015 return rc;
1016
1017 gid = make_kgid(current_user_ns(), value);
1018 if (!gid_valid(gid))
1019 return -EINVAL;
1020
1021 *result = gid;
1022 return 0;
1023}
8830d7e0
SP		 1024
1025static int cifs_parse_security_flavors(char *value,
1026 struct smb_vol *vol)
1027{
1028
1029 substring_t args[MAX_OPT_ARGS];
1030
1e3cc57e
JL		 1031 /*
1032 * With mount options, the last one should win. Reset any existing
1033 * settings back to default.
1034 */
1035 vol->sectype = Unspecified;
1036 vol->sign = false;
1037
8830d7e0 1038 switch (match_token(value, cifs_secflavor_tokens, args)) {
3f618223
JL		 1039 case Opt_sec_krb5p:
1040 cifs_dbg(VFS, "sec=krb5p is not supported!\n");
1041 return 1;
1042 case Opt_sec_krb5i:
1043 vol->sign = true;
1044 /* Fallthrough */
8830d7e0 1045 case Opt_sec_krb5:
1e3cc57e 1046 vol->sectype = Kerberos;
8830d7e0 1047 break;
3f618223 1048 case Opt_sec_ntlmsspi:
1e3cc57e 1049 vol->sign = true;
3f618223 1050 /* Fallthrough */
8830d7e0 1051 case Opt_sec_ntlmssp:
1e3cc57e 1052 vol->sectype = RawNTLMSSP;
8830d7e0 1053 break;
3f618223 1054 case Opt_sec_ntlmi:
1e3cc57e 1055 vol->sign = true;
3f618223 1056 /* Fallthrough */
8830d7e0 1057 case Opt_ntlm:
1e3cc57e 1058 vol->sectype = NTLM;
8830d7e0 1059 break;
3f618223 1060 case Opt_sec_ntlmv2i:
1e3cc57e 1061 vol->sign = true;
3f618223 1062 /* Fallthrough */
7659624f 1063 case Opt_sec_ntlmv2:
1e3cc57e 1064 vol->sectype = NTLMv2;
8830d7e0
SP		 1065 break;
1066#ifdef CONFIG_CIFS_WEAK_PW_HASH
1067 case Opt_sec_lanman:
1e3cc57e 1068 vol->sectype = LANMAN;
8830d7e0
SP		 1069 break;
1070#endif
1071 case Opt_sec_none:
1072 vol->nullauth = 1;
1073 break;
1074 default:
f96637be 1075 cifs_dbg(VFS, "bad security option: %s\n", value);
8830d7e0
SP		 1076 return 1;
1077 }
1078
1079 return 0;
1080}
1081
15b6a473
JL		 1082static int
1083cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1084{
1085 substring_t args[MAX_OPT_ARGS];
1086
1087 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1088 case Opt_cache_loose:
1089 vol->direct_io = false;
1090 vol->strict_io = false;
1091 break;
1092 case Opt_cache_strict:
1093 vol->direct_io = false;
1094 vol->strict_io = true;
1095 break;
1096 case Opt_cache_none:
1097 vol->direct_io = true;
1098 vol->strict_io = false;
1099 break;
1100 default:
f96637be 1101 cifs_dbg(VFS, "bad cache= option: %s\n", value);
15b6a473
JL		 1102 return 1;
1103 }
1104 return 0;
1105}
1106
23db65f5
JL		 1107static int
1108cifs_parse_smb_version(char *value, struct smb_vol *vol)
1109{
1110 substring_t args[MAX_OPT_ARGS];
1111
1112 switch (match_token(value, cifs_smb_version_tokens, args)) {
1113 case Smb_1:
1114 vol->ops = &smb1_operations;
1115 vol->vals = &smb1_values;
1116 break;
1080ef75 1117#ifdef CONFIG_CIFS_SMB2
dd446b16 1118 case Smb_20:
53ef1016 1119 vol->ops = &smb20_operations;
dd446b16
SF		 1120 vol->vals = &smb20_values;
1121 break;
1080ef75
SF		 1122 case Smb_21:
1123 vol->ops = &smb21_operations;
1124 vol->vals = &smb21_values;
1125 break;
e4aa25e7 1126 case Smb_30:
38107d45 1127 vol->ops = &smb30_operations;
e4aa25e7
SF		 1128 vol->vals = &smb30_values;
1129 break;
20b6d8b4
SF		 1130 case Smb_302:
1131 vol->ops = &smb30_operations; /* currently identical with 3.0 */
1132 vol->vals = &smb302_values;
1133 break;
1080ef75 1134#endif
23db65f5 1135 default:
f96637be 1136 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
23db65f5
JL		 1137 return 1;
1138 }
1139 return 0;
1140}
1141
d387a5c5
JL		 1142/*
1143 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1144 * fields with the result. Returns 0 on success and an error otherwise.
1145 */
1146static int
1147cifs_parse_devname(const char *devname, struct smb_vol *vol)
1148{
1149 char *pos;
1150 const char *delims = "/\\";
1151 size_t len;
1152
1153 /* make sure we have a valid UNC double delimiter prefix */
1154 len = strspn(devname, delims);
1155 if (len != 2)
1156 return -EINVAL;
1157
1158 /* find delimiter between host and sharename */
1159 pos = strpbrk(devname + 2, delims);
1160 if (!pos)
1161 return -EINVAL;
1162
1163 /* skip past delimiter */
1164 ++pos;
1165
1166 /* now go until next delimiter or end of string */
1167 len = strcspn(pos, delims);
1168
1169 /* move "pos" up to delimiter or NULL */
1170 pos += len;
1171 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1172 if (!vol->UNC)
1173 return -ENOMEM;
1174
1175 convert_delimiter(vol->UNC, '\\');
1176
1177 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1178 if (!*pos++ || !*pos)
1179 return 0;
1180
1181 vol->prepath = kstrdup(pos, GFP_KERNEL);
1182 if (!vol->prepath)
1183 return -ENOMEM;
1184
1185 return 0;
1186}
1187
1da177e4 1188static int
b946845a 1189cifs_parse_mount_options(const char *mountdata, const char *devname,
50c2f753 1190 struct smb_vol *vol)
1da177e4 1191{
8830d7e0 1192 char *data, *end;
957df453 1193 char *mountdata_copy = NULL, *options;
1da177e4
LT		 1194 unsigned int temp_len, i, j;
1195 char separator[2];
9b9d6b24
JL		 1196 short int override_uid = -1;
1197 short int override_gid = -1;
1198 bool uid_specified = false;
1199 bool gid_specified = false;
d8162558
JL		 1200 bool sloppy = false;
1201 char *invalid = NULL;
88463999 1202 char *nodename = utsname()->nodename;
8830d7e0
SP		 1203 char *string = NULL;
1204 char *tmp_end, *value;
1205 char delim;
b979aaa1
JL		 1206 bool got_ip = false;
1207 unsigned short port = 0;
1208 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1da177e4
LT		 1209
1210 separator[0] = ',';
50c2f753 1211 separator[1] = 0;
8830d7e0 1212 delim = separator[0];
1da177e4 1213
6ee9542a
JL		 1214 /* ensure we always start with zeroed-out smb_vol */
1215 memset(vol, 0, sizeof(*vol));
1216
88463999
JL		 1217 /*
1218 * does not have to be perfect mapping since field is
1219 * informational, only used for servers that do not support
1220 * port 445 and it can be overridden at mount time
1221 */
1397f2ee
JL		 1222 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1223 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
88463999
JL		 1224 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1225
1397f2ee 1226 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
a10faeb2
SF		 1227 /* null target name indicates to use *SMBSERVR default called name
1228 if we end up sending RFC1001 session initialize */
1229 vol->target_rfc1001_name[0] = 0;
3e4b3e1f
JL		 1230 vol->cred_uid = current_uid();
1231 vol->linux_uid = current_uid();
a001e5b5 1232 vol->linux_gid = current_gid();
f55ed1a8
JL		 1233
1234 /* default to only allowing write access to owner of the mount */
1235 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1da177e4
LT		 1236
1237 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
ac67055e
JA		 1238 /* default is always to request posix paths. */
1239 vol->posix_paths = 1;
a0c9217f
JL		 1240 /* default to using server inode numbers where available */
1241 vol->server_ino = 1;
ac67055e 1242
1b359204
JL		 1243 /* default is to use strict cifs caching semantics */
1244 vol->strict_io = true;
1245
6d20e840
SJ		 1246 vol->actimeo = CIFS_DEF_ACTIMEO;
1247
23db65f5
JL		 1248 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1249 vol->ops = &smb1_operations;
1250 vol->vals = &smb1_values;
1251
b946845a
SF		 1252 if (!mountdata)
1253 goto cifs_parse_mount_err;
1254
1255 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1256 if (!mountdata_copy)
1257 goto cifs_parse_mount_err;
1da177e4 1258
b946845a 1259 options = mountdata_copy;
4906e50b 1260 end = options + strlen(options);
8830d7e0 1261
50c2f753 1262 if (strncmp(options, "sep=", 4) == 0) {
fb8c4b14 1263 if (options[4] != 0) {
1da177e4
LT		 1264 separator[0] = options[4];
1265 options += 5;
1266 } else {
f96637be 1267 cifs_dbg(FYI, "Null separator not allowed\n");
1da177e4
LT		 1268 }
1269 }
3d3ea8e6
SP		 1270 vol->backupuid_specified = false; /* no backup intent for a user */
1271 vol->backupgid_specified = false; /* no backup intent for a group */
50c2f753 1272
37d4f99b
JL		 1273 switch (cifs_parse_devname(devname, vol)) {
1274 case 0:
1275 break;
1276 case -ENOMEM:
1277 cifs_dbg(VFS, "Unable to allocate memory for devname.\n");
1278 goto cifs_parse_mount_err;
1279 case -EINVAL:
1280 cifs_dbg(VFS, "Malformed UNC in devname.\n");
1281 goto cifs_parse_mount_err;
1282 default:
1283 cifs_dbg(VFS, "Unknown error parsing devname.\n");
1284 goto cifs_parse_mount_err;
d387a5c5
JL		 1285 }
1286
1da177e4 1287 while ((data = strsep(&options, separator)) != NULL) {
8830d7e0
SP		 1288 substring_t args[MAX_OPT_ARGS];
1289 unsigned long option;
1290 int token;
1291
1da177e4
LT		 1292 if (!*data)
1293 continue;
1da177e4 1294
8830d7e0
SP		 1295 token = match_token(data, cifs_mount_option_tokens, args);
1296
1297 switch (token) {
1298
1299 /* Ingnore the following */
1300 case Opt_ignore:
1301 break;
1302
1303 /* Boolean values */
1304 case Opt_user_xattr:
1da177e4 1305 vol->no_xattr = 0;
8830d7e0
SP		 1306 break;
1307 case Opt_nouser_xattr:
1da177e4 1308 vol->no_xattr = 1;
8830d7e0
SP		 1309 break;
1310 case Opt_forceuid:
9b9d6b24 1311 override_uid = 1;
8830d7e0
SP		 1312 break;
1313 case Opt_noforceuid:
9b9d6b24 1314 override_uid = 0;
8830d7e0 1315 break;
72bd481f
JL		 1316 case Opt_forcegid:
1317 override_gid = 1;
1318 break;
1319 case Opt_noforcegid:
1320 override_gid = 0;
1321 break;
8830d7e0 1322 case Opt_noblocksend:
edf1ae40 1323 vol->noblocksnd = 1;
8830d7e0
SP		 1324 break;
1325 case Opt_noautotune:
edf1ae40 1326 vol->noautotune = 1;
8830d7e0
SP		 1327 break;
1328 case Opt_hard:
1da177e4 1329 vol->retry = 1;
8830d7e0
SP		 1330 break;
1331 case Opt_soft:
1da177e4 1332 vol->retry = 0;
8830d7e0
SP		 1333 break;
1334 case Opt_perm:
1da177e4 1335 vol->noperm = 0;
8830d7e0
SP		 1336 break;
1337 case Opt_noperm:
1da177e4 1338 vol->noperm = 1;
8830d7e0
SP		 1339 break;
1340 case Opt_mapchars:
6a0b4824 1341 vol->remap = 1;
8830d7e0
SP		 1342 break;
1343 case Opt_nomapchars:
6a0b4824 1344 vol->remap = 0;
8830d7e0
SP		 1345 break;
1346 case Opt_sfu:
50c2f753 1347 vol->sfu_emul = 1;
8830d7e0
SP		 1348 break;
1349 case Opt_nosfu:
50c2f753 1350 vol->sfu_emul = 0;
8830d7e0
SP		 1351 break;
1352 case Opt_nodfs:
2c1b8615 1353 vol->nodfs = 1;
8830d7e0
SP		 1354 break;
1355 case Opt_posixpaths:
ac67055e 1356 vol->posix_paths = 1;
8830d7e0
SP		 1357 break;
1358 case Opt_noposixpaths:
ac67055e 1359 vol->posix_paths = 0;
8830d7e0
SP		 1360 break;
1361 case Opt_nounix:
c18c842b 1362 vol->no_linux_ext = 1;
8830d7e0
SP		 1363 break;
1364 case Opt_nocase:
50c2f753 1365 vol->nocase = 1;
8830d7e0
SP		 1366 break;
1367 case Opt_brl:
c46fa8ac 1368 vol->nobrl = 0;
8830d7e0
SP		 1369 break;
1370 case Opt_nobrl:
c46fa8ac 1371 vol->nobrl = 1;
5cfdddcf
PS		 1372 /*
1373 * turn off mandatory locking in mode
8830d7e0 1374 * if remote locking is turned off since the
5cfdddcf
PS		 1375 * local vfs will do advisory
1376 */
50c2f753
SF		 1377 if (vol->file_mode ==
1378 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
d3485d37 1379 vol->file_mode = S_IALLUGO;
8830d7e0
SP		 1380 break;
1381 case Opt_forcemandatorylock:
13a6e42a 1382 vol->mand_lock = 1;
8830d7e0
SP		 1383 break;
1384 case Opt_setuids:
1da177e4 1385 vol->setuids = 1;
8830d7e0
SP		 1386 break;
1387 case Opt_nosetuids:
1da177e4 1388 vol->setuids = 0;
8830d7e0
SP		 1389 break;
1390 case Opt_dynperm:
d0a9c078 1391 vol->dynperm = true;
8830d7e0
SP		 1392 break;
1393 case Opt_nodynperm:
d0a9c078 1394 vol->dynperm = false;
8830d7e0
SP		 1395 break;
1396 case Opt_nohard:
1da177e4 1397 vol->retry = 0;
8830d7e0
SP		 1398 break;
1399 case Opt_nosoft:
1da177e4 1400 vol->retry = 1;
8830d7e0
SP		 1401 break;
1402 case Opt_nointr:
1da177e4 1403 vol->intr = 0;
8830d7e0
SP		 1404 break;
1405 case Opt_intr:
1da177e4 1406 vol->intr = 1;
8830d7e0
SP		 1407 break;
1408 case Opt_nostrictsync:
be652445 1409 vol->nostrictsync = 1;
8830d7e0
SP		 1410 break;
1411 case Opt_strictsync:
be652445 1412 vol->nostrictsync = 0;
8830d7e0
SP		 1413 break;
1414 case Opt_serverino:
1da177e4 1415 vol->server_ino = 1;
8830d7e0
SP		 1416 break;
1417 case Opt_noserverino:
1da177e4 1418 vol->server_ino = 0;
8830d7e0
SP		 1419 break;
1420 case Opt_rwpidforward:
d4ffff1f 1421 vol->rwpidforward = 1;
8830d7e0
SP		 1422 break;
1423 case Opt_cifsacl:
0a4b92c0 1424 vol->cifs_acl = 1;
8830d7e0
SP		 1425 break;
1426 case Opt_nocifsacl:
0a4b92c0 1427 vol->cifs_acl = 0;
8830d7e0
SP		 1428 break;
1429 case Opt_acl:
1da177e4 1430 vol->no_psx_acl = 0;
8830d7e0
SP		 1431 break;
1432 case Opt_noacl:
1da177e4 1433 vol->no_psx_acl = 1;
8830d7e0
SP		 1434 break;
1435 case Opt_locallease:
84210e91 1436 vol->local_lease = 1;
8830d7e0
SP		 1437 break;
1438 case Opt_sign:
1e3cc57e 1439 vol->sign = true;
8830d7e0
SP		 1440 break;
1441 case Opt_seal:
95b1cb90 1442 /* we do not do the following in secFlags because seal
8830d7e0
SP		 1443 * is a per tree connection (mount) not a per socket
1444 * or per-smb connection option in the protocol
1445 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1446 */
95b1cb90 1447 vol->seal = 1;
8830d7e0 1448 break;
8830d7e0 1449 case Opt_noac:
50c2f753
SF		 1450 printk(KERN_WARNING "CIFS: Mount option noac not "
1451 "supported. Instead set "
1452 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
8830d7e0
SP		 1453 break;
1454 case Opt_fsc:
607a569d 1455#ifndef CONFIG_CIFS_FSCACHE
f96637be 1456 cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
b946845a 1457 goto cifs_parse_mount_err;
607a569d 1458#endif
fa1df75d 1459 vol->fsc = true;
8830d7e0
SP		 1460 break;
1461 case Opt_mfsymlinks:
736a3320 1462 vol->mfsymlinks = true;
8830d7e0
SP		 1463 break;
1464 case Opt_multiuser:
0eb8a132 1465 vol->multiuser = true;
8830d7e0 1466 break;
d8162558
JL		 1467 case Opt_sloppy:
1468 sloppy = true;
1469 break;
a0b3df5c
JL		 1470 case Opt_nosharesock:
1471 vol->nosharesock = true;
1472 break;
8830d7e0
SP		 1473
1474 /* Numeric Values */
1475 case Opt_backupuid:
3da46565 1476 if (get_option_uid(args, &vol->backupuid)) {
f96637be
JP		 1477 cifs_dbg(VFS, "%s: Invalid backupuid value\n",
1478 __func__);
3d3ea8e6
SP		 1479 goto cifs_parse_mount_err;
1480 }
1481 vol->backupuid_specified = true;
8830d7e0
SP		 1482 break;
1483 case Opt_backupgid:
3da46565 1484 if (get_option_gid(args, &vol->backupgid)) {
f96637be
JP		 1485 cifs_dbg(VFS, "%s: Invalid backupgid value\n",
1486 __func__);
3d3ea8e6
SP		 1487 goto cifs_parse_mount_err;
1488 }
1489 vol->backupgid_specified = true;
8830d7e0
SP		 1490 break;
1491 case Opt_uid:
3da46565 1492 if (get_option_uid(args, &vol->linux_uid)) {
f96637be
JP		 1493 cifs_dbg(VFS, "%s: Invalid uid value\n",
1494 __func__);
8830d7e0
SP		 1495 goto cifs_parse_mount_err;
1496 }
8830d7e0
SP		 1497 uid_specified = true;
1498 break;
1499 case Opt_cruid:
3da46565 1500 if (get_option_uid(args, &vol->cred_uid)) {
f96637be
JP		 1501 cifs_dbg(VFS, "%s: Invalid cruid value\n",
1502 __func__);
8830d7e0
SP		 1503 goto cifs_parse_mount_err;
1504 }
8830d7e0
SP		 1505 break;
1506 case Opt_gid:
3da46565 1507 if (get_option_gid(args, &vol->linux_gid)) {
f96637be
JP		 1508 cifs_dbg(VFS, "%s: Invalid gid value\n",
1509 __func__);
8830d7e0
SP		 1510 goto cifs_parse_mount_err;
1511 }
8830d7e0
SP		 1512 gid_specified = true;
1513 break;
1514 case Opt_file_mode:
1515 if (get_option_ul(args, &option)) {
f96637be
JP		 1516 cifs_dbg(VFS, "%s: Invalid file_mode value\n",
1517 __func__);
8830d7e0
SP		 1518 goto cifs_parse_mount_err;
1519 }
1520 vol->file_mode = option;
1521 break;
1522 case Opt_dirmode:
1523 if (get_option_ul(args, &option)) {
f96637be
JP		 1524 cifs_dbg(VFS, "%s: Invalid dir_mode value\n",
1525 __func__);
8830d7e0
SP		 1526 goto cifs_parse_mount_err;
1527 }
1528 vol->dir_mode = option;
1529 break;
1530 case Opt_port:
b979aaa1
JL		 1531 if (get_option_ul(args, &option) ||
1532 option > USHRT_MAX) {
f96637be
JP		 1533 cifs_dbg(VFS, "%s: Invalid port value\n",
1534 __func__);
8830d7e0
SP		 1535 goto cifs_parse_mount_err;
1536 }
b979aaa1 1537 port = (unsigned short)option;
8830d7e0
SP		 1538 break;
1539 case Opt_rsize:
1540 if (get_option_ul(args, &option)) {
f96637be
JP		 1541 cifs_dbg(VFS, "%s: Invalid rsize value\n",
1542 __func__);
b946845a 1543 goto cifs_parse_mount_err;
8830d7e0
SP		 1544 }
1545 vol->rsize = option;
1546 break;
1547 case Opt_wsize:
1548 if (get_option_ul(args, &option)) {
f96637be
JP		 1549 cifs_dbg(VFS, "%s: Invalid wsize value\n",
1550 __func__);
8830d7e0
SP		 1551 goto cifs_parse_mount_err;
1552 }
1553 vol->wsize = option;
1554 break;
1555 case Opt_actimeo:
1556 if (get_option_ul(args, &option)) {
f96637be
JP		 1557 cifs_dbg(VFS, "%s: Invalid actimeo value\n",
1558 __func__);
8830d7e0
SP		 1559 goto cifs_parse_mount_err;
1560 }
1561 vol->actimeo = HZ * option;
1562 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
f96637be 1563 cifs_dbg(VFS, "attribute cache timeout too large\n");
8830d7e0
SP		 1564 goto cifs_parse_mount_err;
1565 }
1566 break;
1567
1568 /* String Arguments */
1569
4fe9e963
SP		 1570 case Opt_blank_user:
1571 /* null user, ie. anonymous authentication */
1572 vol->nullauth = 1;
1573 vol->username = NULL;
1574 break;
8830d7e0
SP		 1575 case Opt_user:
1576 string = match_strdup(args);
1577 if (string == NULL)
1578 goto out_nomem;
1579
8c3a2b4c
SL		 1580 if (strnlen(string, CIFS_MAX_USERNAME_LEN) >
1581 CIFS_MAX_USERNAME_LEN) {
8830d7e0
SP		 1582 printk(KERN_WARNING "CIFS: username too long\n");
1583 goto cifs_parse_mount_err;
1584 }
1585 vol->username = kstrdup(string, GFP_KERNEL);
f96637be 1586 if (!vol->username)
8830d7e0 1587 goto cifs_parse_mount_err;
8830d7e0
SP		 1588 break;
1589 case Opt_blank_pass:
8830d7e0
SP		 1590 /* passwords have to be handled differently
1591 * to allow the character used for deliminator
1592 * to be passed within them
1593 */
1594
c369c9a4
SP		 1595 /*
1596 * Check if this is a case where the password
1597 * starts with a delimiter
1598 */
1599 tmp_end = strchr(data, '=');
1600 tmp_end++;
1601 if (!(tmp_end < end && tmp_end[1] == delim)) {
1602 /* No it is not. Set the password to NULL */
d6ccf499 1603 kfree(vol->password);
c369c9a4
SP		 1604 vol->password = NULL;
1605 break;
1606 }
1607 /* Yes it is. Drop down to Opt_pass below.*/
1608 case Opt_pass:
8830d7e0
SP		 1609 /* Obtain the value string */
1610 value = strchr(data, '=');
10238074 1611 value++;
8830d7e0
SP		 1612
1613 /* Set tmp_end to end of the string */
1614 tmp_end = (char *) value + strlen(value);
1615
1616 /* Check if following character is the deliminator
1617 * If yes, we have encountered a double deliminator
1618 * reset the NULL character to the deliminator
1619 */
e73f843a 1620 if (tmp_end < end && tmp_end[1] == delim) {
8830d7e0
SP		 1621 tmp_end[0] = delim;
1622
e73f843a
SJ		 1623 /* Keep iterating until we get to a single
1624 * deliminator OR the end
1625 */
1626 while ((tmp_end = strchr(tmp_end, delim))
1627 != NULL && (tmp_end[1] == delim)) {
1628 tmp_end = (char *) &tmp_end[2];
1629 }
1630
1631 /* Reset var options to point to next element */
1632 if (tmp_end) {
1633 tmp_end[0] = '\0';
1634 options = (char *) &tmp_end[1];
1635 } else
1636 /* Reached the end of the mount option
1637 * string */
1638 options = end;
8830d7e0
SP		 1639 }
1640
d6ccf499 1641 kfree(vol->password);
8830d7e0
SP		 1642 /* Now build new password string */
1643 temp_len = strlen(value);
1644 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1645 if (vol->password == NULL) {
1646 printk(KERN_WARNING "CIFS: no memory "
1647 "for password\n");
1648 goto cifs_parse_mount_err;
1649 }
1650
1651 for (i = 0, j = 0; i < temp_len; i++, j++) {
1652 vol->password[j] = value[i];
1653 if ((value[i] == delim) &&
1654 value[i+1] == delim)
1655 /* skip the second deliminator */
1656 i++;
1657 }
1658 vol->password[j] = '\0';
1659 break;
4fe9e963 1660 case Opt_blank_ip:
b979aaa1
JL		 1661 /* FIXME: should this be an error instead? */
1662 got_ip = false;
4fe9e963 1663 break;
8830d7e0
SP		 1664 case Opt_ip:
1665 string = match_strdup(args);
1666 if (string == NULL)
1667 goto out_nomem;
1668
b979aaa1
JL		 1669 if (!cifs_convert_address(dstaddr, string,
1670 strlen(string))) {
1671 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1672 string);
8830d7e0
SP		 1673 goto cifs_parse_mount_err;
1674 }
b979aaa1 1675 got_ip = true;
8830d7e0 1676 break;
8830d7e0
SP		 1677 case Opt_domain:
1678 string = match_strdup(args);
1679 if (string == NULL)
1680 goto out_nomem;
1681
057d6332
CG		 1682 if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN)
1683 == CIFS_MAX_DOMAINNAME_LEN) {
8830d7e0
SP		 1684 printk(KERN_WARNING "CIFS: domain name too"
1685 " long\n");
1686 goto cifs_parse_mount_err;
1687 }
1688
1689 vol->domainname = kstrdup(string, GFP_KERNEL);
1690 if (!vol->domainname) {
1691 printk(KERN_WARNING "CIFS: no memory "
1692 "for domainname\n");
1693 goto cifs_parse_mount_err;
1694 }
f96637be 1695 cifs_dbg(FYI, "Domain name set\n");
8830d7e0
SP		 1696 break;
1697 case Opt_srcaddr:
1698 string = match_strdup(args);
1699 if (string == NULL)
1700 goto out_nomem;
1701
4fe9e963 1702 if (!cifs_convert_address(
8830d7e0
SP		 1703 (struct sockaddr *)&vol->srcaddr,
1704 string, strlen(string))) {
1705 printk(KERN_WARNING "CIFS: Could not parse"
1706 " srcaddr: %s\n", string);
1707 goto cifs_parse_mount_err;
1708 }
1709 break;
8830d7e0
SP		 1710 case Opt_iocharset:
1711 string = match_strdup(args);
1712 if (string == NULL)
1713 goto out_nomem;
1714
4fe9e963 1715 if (strnlen(string, 1024) >= 65) {
8830d7e0
SP		 1716 printk(KERN_WARNING "CIFS: iocharset name "
1717 "too long.\n");
1718 goto cifs_parse_mount_err;
1719 }
1720
1721 if (strnicmp(string, "default", 7) != 0) {
1722 vol->iocharset = kstrdup(string,
1723 GFP_KERNEL);
1724 if (!vol->iocharset) {
1725 printk(KERN_WARNING "CIFS: no memory"
1726 "for charset\n");
1727 goto cifs_parse_mount_err;
1728 }
1729 }
1730 /* if iocharset not set then load_nls_default
1731 * is used by caller
1732 */
f96637be 1733 cifs_dbg(FYI, "iocharset set to %s\n", string);
8830d7e0 1734 break;
8830d7e0
SP		 1735 case Opt_netbiosname:
1736 string = match_strdup(args);
1737 if (string == NULL)
1738 goto out_nomem;
1739
8830d7e0
SP		 1740 memset(vol->source_rfc1001_name, 0x20,
1741 RFC1001_NAME_LEN);
1742 /*
1743 * FIXME: are there cases in which a comma can
1744 * be valid in workstation netbios name (and
1745 * need special handling)?
1746 */
1747 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1748 /* don't ucase netbiosname for user */
1749 if (string[i] == 0)
1750 break;
1751 vol->source_rfc1001_name[i] = string[i];
1752 }
1753 /* The string has 16th byte zero still from
1754 * set at top of the function
1755 */
1756 if (i == RFC1001_NAME_LEN && string[i] != 0)
1757 printk(KERN_WARNING "CIFS: netbiosname"
1758 " longer than 15 truncated.\n");
1759
1760 break;
1761 case Opt_servern:
1762 /* servernetbiosname specified override *SMBSERVER */
1763 string = match_strdup(args);
1764 if (string == NULL)
1765 goto out_nomem;
1766
8830d7e0
SP		 1767 /* last byte, type, is 0x20 for servr type */
1768 memset(vol->target_rfc1001_name, 0x20,
1769 RFC1001_NAME_LEN_WITH_NULL);
1770
1771 /* BB are there cases in which a comma can be
1772 valid in this workstation netbios name
1773 (and need special handling)? */
1774
1775 /* user or mount helper must uppercase the
1776 netbios name */
1777 for (i = 0; i < 15; i++) {
1778 if (string[i] == 0)
1779 break;
1780 vol->target_rfc1001_name[i] = string[i];
1781 }
1782 /* The string has 16th byte zero still from
1783 set at top of the function */
1784 if (i == RFC1001_NAME_LEN && string[i] != 0)
1785 printk(KERN_WARNING "CIFS: server net"
1786 "biosname longer than 15 truncated.\n");
1787 break;
1788 case Opt_ver:
1789 string = match_strdup(args);
1790 if (string == NULL)
1791 goto out_nomem;
1792
5249af32 1793 if (strnicmp(string, "1", 1) == 0) {
8830d7e0
SP		 1794 /* This is the default */
1795 break;
1796 }
1797 /* For all other value, error */
1798 printk(KERN_WARNING "CIFS: Invalid version"
1799 " specified\n");
b946845a 1800 goto cifs_parse_mount_err;
23db65f5
JL		 1801 case Opt_vers:
1802 string = match_strdup(args);
1803 if (string == NULL)
1804 goto out_nomem;
1805
1806 if (cifs_parse_smb_version(string, vol) != 0)
1807 goto cifs_parse_mount_err;
1808 break;
8830d7e0
SP		 1809 case Opt_sec:
1810 string = match_strdup(args);
1811 if (string == NULL)
1812 goto out_nomem;
1813
8830d7e0
SP		 1814 if (cifs_parse_security_flavors(string, vol) != 0)
1815 goto cifs_parse_mount_err;
1816 break;
15b6a473
JL		 1817 case Opt_cache:
1818 string = match_strdup(args);
1819 if (string == NULL)
1820 goto out_nomem;
1821
1822 if (cifs_parse_cache_flavor(string, vol) != 0)
1823 goto cifs_parse_mount_err;
1824 break;
8830d7e0 1825 default:
d8162558
JL		 1826 /*
1827 * An option we don't recognize. Save it off for later
1828 * if we haven't already found one
1829 */
1830 if (!invalid)
1831 invalid = data;
8830d7e0 1832 break;
1da177e4 1833 }
8830d7e0
SP		 1834 /* Free up any allocated string */
1835 kfree(string);
1836 string = NULL;
1da177e4 1837 }
0eb8a132 1838
d8162558
JL		 1839 if (!sloppy && invalid) {
1840 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1841 goto cifs_parse_mount_err;
1842 }
1843
8a8798a5
JL		 1844#ifndef CONFIG_KEYS
1845 /* Muliuser mounts require CONFIG_KEYS support */
1846 if (vol->multiuser) {
f96637be 1847 cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
b946845a 1848 goto cifs_parse_mount_err;
0eb8a132 1849 }
8a8798a5 1850#endif
e5e69abd 1851 if (!vol->UNC) {
37d4f99b 1852 cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n");
e5e69abd
JL		 1853 goto cifs_parse_mount_err;
1854 }
0eb8a132 1855
62a1a439
JL		 1856 /* make sure UNC has a share name */
1857 if (!strchr(vol->UNC + 3, '\\')) {
f96637be 1858 cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n");
62a1a439
JL		 1859 goto cifs_parse_mount_err;
1860 }
1861
b979aaa1
JL		 1862 if (!got_ip) {
1863 /* No ip= option specified? Try to get it from UNC */
1864 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1865 strlen(&vol->UNC[2]))) {
1866 printk(KERN_ERR "Unable to determine destination "
1867 "address.\n");
1868 goto cifs_parse_mount_err;
1869 }
1870 }
1871
1872 /* set the port that we got earlier */
1873 cifs_set_port(dstaddr, port);
1da177e4 1874
9b9d6b24
JL		 1875 if (uid_specified)
1876 vol->override_uid = override_uid;
1877 else if (override_uid == 1)
1878 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1879 "specified with no uid= option.\n");
1880
1881 if (gid_specified)
1882 vol->override_gid = override_gid;
1883 else if (override_gid == 1)
1884 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1885 "specified with no gid= option.\n");
1886
b946845a 1887 kfree(mountdata_copy);
1da177e4 1888 return 0;
b946845a 1889
8830d7e0
SP		 1890out_nomem:
1891 printk(KERN_WARNING "Could not allocate temporary buffer\n");
b946845a 1892cifs_parse_mount_err:
8830d7e0 1893 kfree(string);
b946845a
SF		 1894 kfree(mountdata_copy);
1895 return 1;
1da177e4
LT		 1896}
1897
3eb9a889
BG		 1898/** Returns true if srcaddr isn't specified and rhs isn't
1899 * specified, or if srcaddr is specified and
1900 * matches the IP address of the rhs argument.
1901 */
1902static bool
1903srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1904{
1905 switch (srcaddr->sa_family) {
1906 case AF_UNSPEC:
1907 return (rhs->sa_family == AF_UNSPEC);
1908 case AF_INET: {
1909 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1910 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1911 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1912 }
1913 case AF_INET6: {
1914 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
e3e2775c 1915 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
3eb9a889
BG		 1916 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1917 }
1918 default:
1919 WARN_ON(1);
1920 return false; /* don't expect to be here */
1921 }
1922}
1923
4b886136
PS		 1924/*
1925 * If no port is specified in addr structure, we try to match with 445 port
1926 * and if it fails - with 139 ports. It should be called only if address
1927 * families of server and addr are equal.
1928 */
1929static bool
1930match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1931{
6da97910 1932 __be16 port, *sport;
4b886136
PS		 1933
1934 switch (addr->sa_family) {
1935 case AF_INET:
1936 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1937 port = ((struct sockaddr_in *) addr)->sin_port;
1938 break;
1939 case AF_INET6:
1940 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1941 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1942 break;
1943 default:
1944 WARN_ON(1);
1945 return false;
1946 }
1947
1948 if (!port) {
1949 port = htons(CIFS_PORT);
1950 if (port == *sport)
1951 return true;
1952
1953 port = htons(RFC1001_PORT);
1954 }
1955
1956 return port == *sport;
1957}
3eb9a889 1958
4515148e 1959static bool
3eb9a889
BG		 1960match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1961 struct sockaddr *srcaddr)
4515148e 1962{
4515148e 1963 switch (addr->sa_family) {
a9f1b85e
PS		 1964 case AF_INET: {
1965 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1966 struct sockaddr_in *srv_addr4 =
1967 (struct sockaddr_in *)&server->dstaddr;
1968
1969 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
4515148e 1970 return false;
4515148e 1971 break;
a9f1b85e
PS		 1972 }
1973 case AF_INET6: {
1974 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1975 struct sockaddr_in6 *srv_addr6 =
1976 (struct sockaddr_in6 *)&server->dstaddr;
1977
4515148e 1978 if (!ipv6_addr_equal(&addr6->sin6_addr,
a9f1b85e 1979 &srv_addr6->sin6_addr))
4515148e 1980 return false;
a9f1b85e 1981 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
4515148e 1982 return false;
4515148e
JL		 1983 break;
1984 }
a9f1b85e
PS		 1985 default:
1986 WARN_ON(1);
1987 return false; /* don't expect to be here */
1988 }
4515148e 1989
3eb9a889
BG		 1990 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1991 return false;
1992
4515148e
JL		 1993 return true;
1994}
1995
daf5b0b6
JL		 1996static bool
1997match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1998{
3f618223
JL		 1999 /*
2000 * The select_sectype function should either return the vol->sectype
2001 * that was specified, or "Unspecified" if that sectype was not
2002 * compatible with the given NEGOTIATE request.
2003 */
2004 if (select_sectype(server, vol->sectype) == Unspecified)
daf5b0b6 2005 return false;
daf5b0b6 2006
3f618223
JL		 2007 /*
2008 * Now check if signing mode is acceptable. No need to check
2009 * global_secflags at this point since if MUST_SIGN is set then
2010 * the server->sign had better be too.
2011 */
38d77c50
JL		 2012 if (vol->sign && !server->sign)
2013 return false;
daf5b0b6
JL		 2014
2015 return true;
2016}
2017
9fa114f7 2018static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
37bb04e5 2019{
9fa114f7
JL		 2020 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2021
a0b3df5c
JL		 2022 if (vol->nosharesock)
2023 return 0;
2024
23db65f5
JL		 2025 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2026 return 0;
2027
37bb04e5
PS		 2028 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2029 return 0;
2030
2031 if (!match_address(server, addr,
2032 (struct sockaddr *)&vol->srcaddr))
2033 return 0;
2034
2035 if (!match_port(server, addr))
2036 return 0;
2037
2038 if (!match_security(server, vol))
2039 return 0;
2040
2041 return 1;
2042}
2043
e7ddee90 2044static struct TCP_Server_Info *
9fa114f7 2045cifs_find_tcp_session(struct smb_vol *vol)
1da177e4 2046{
e7ddee90 2047 struct TCP_Server_Info *server;
e7ddee90 2048
3f9bcca7 2049 spin_lock(&cifs_tcp_ses_lock);
4515148e 2050 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
9fa114f7 2051 if (!match_server(server, vol))
daf5b0b6
JL		 2052 continue;
2053
e7ddee90 2054 ++server->srv_count;
3f9bcca7 2055 spin_unlock(&cifs_tcp_ses_lock);
f96637be 2056 cifs_dbg(FYI, "Existing tcp session with server found\n");
e7ddee90 2057 return server;
1da177e4 2058 }
3f9bcca7 2059 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2060 return NULL;
2061}
1b20d672 2062
14fbf50d 2063static void
e7ddee90 2064cifs_put_tcp_session(struct TCP_Server_Info *server)
1da177e4 2065{
a5c3e1c7
SF		 2066 struct task_struct *task;
2067
3f9bcca7 2068 spin_lock(&cifs_tcp_ses_lock);
e7ddee90 2069 if (--server->srv_count > 0) {
3f9bcca7 2070 spin_unlock(&cifs_tcp_ses_lock);
e7ddee90 2071 return;
1da177e4 2072 }
1b20d672 2073
f1d0c998
RL		 2074 put_net(cifs_net_ns(server));
2075
e7ddee90 2076 list_del_init(&server->tcp_ses_list);
3f9bcca7 2077 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2078
c74093b6
JL		 2079 cancel_delayed_work_sync(&server->echo);
2080
e7ddee90
JL		 2081 spin_lock(&GlobalMid_Lock);
2082 server->tcpStatus = CifsExiting;
2083 spin_unlock(&GlobalMid_Lock);
dea570e0 2084
d2b91521 2085 cifs_crypto_shash_release(server);
488f1d2d
SJ		 2086 cifs_fscache_release_client_cookie(server);
2087
21e73393
SP		 2088 kfree(server->session_key.response);
2089 server->session_key.response = NULL;
2090 server->session_key.len = 0;
a5c3e1c7
SF		 2091
2092 task = xchg(&server->tsk, NULL);
2093 if (task)
2094 force_sig(SIGKILL, task);
1da177e4
LT		 2095}
2096
63c038c2
JL		 2097static struct TCP_Server_Info *
2098cifs_get_tcp_session(struct smb_vol *volume_info)
2099{
2100 struct TCP_Server_Info *tcp_ses = NULL;
63c038c2
JL		 2101 int rc;
2102
f96637be 2103 cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC);
63c038c2
JL		 2104
2105 /* see if we already have a matching tcp_ses */
9fa114f7 2106 tcp_ses = cifs_find_tcp_session(volume_info);
63c038c2
JL		 2107 if (tcp_ses)
2108 return tcp_ses;
2109
2110 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2111 if (!tcp_ses) {
2112 rc = -ENOMEM;
2113 goto out_err;
2114 }
2115
23db65f5
JL		 2116 tcp_ses->ops = volume_info->ops;
2117 tcp_ses->vals = volume_info->vals;
f1d0c998 2118 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
63c038c2
JL		 2119 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2120 if (IS_ERR(tcp_ses->hostname)) {
2121 rc = PTR_ERR(tcp_ses->hostname);
f7c5445a 2122 goto out_err_crypto_release;
63c038c2
JL		 2123 }
2124
2125 tcp_ses->noblocksnd = volume_info->noblocksnd;
2126 tcp_ses->noautotune = volume_info->noautotune;
6a5fa236 2127 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
fc40f9cf 2128 tcp_ses->in_flight = 0;
2d86dbc9 2129 tcp_ses->credits = 1;
63c038c2
JL		 2130 init_waitqueue_head(&tcp_ses->response_q);
2131 init_waitqueue_head(&tcp_ses->request_q);
2132 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2133 mutex_init(&tcp_ses->srv_mutex);
2134 memcpy(tcp_ses->workstation_RFC1001_name,
2135 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2136 memcpy(tcp_ses->server_RFC1001_name,
2137 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
5d0d2882 2138 tcp_ses->session_estab = false;
63c038c2 2139 tcp_ses->sequence_number = 0;
fda35943 2140 tcp_ses->lstrp = jiffies;
58fa015f 2141 spin_lock_init(&tcp_ses->req_lock);
63c038c2
JL		 2142 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2143 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
c74093b6 2144 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
9fa114f7
JL		 2145 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2146 sizeof(tcp_ses->srcaddr));
2147 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2148 sizeof(tcp_ses->dstaddr));
39552ea8
SP		 2149#ifdef CONFIG_CIFS_SMB2
2150 get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE);
2151#endif
63c038c2
JL		 2152 /*
2153 * at this point we are the only ones with the pointer
2154 * to the struct since the kernel thread not created yet
2155 * no need to spinlock this init of tcpStatus or srv_count
2156 */
2157 tcp_ses->tcpStatus = CifsNew;
2158 ++tcp_ses->srv_count;
2159
a9f1b85e 2160 rc = ip_connect(tcp_ses);
63c038c2 2161 if (rc < 0) {
f96637be 2162 cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
f7c5445a 2163 goto out_err_crypto_release;
63c038c2
JL		 2164 }
2165
2166 /*
2167 * since we're in a cifs function already, we know that
2168 * this will succeed. No need for try_module_get().
2169 */
2170 __module_get(THIS_MODULE);
7c97c200 2171 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
63c038c2
JL		 2172 tcp_ses, "cifsd");
2173 if (IS_ERR(tcp_ses->tsk)) {
2174 rc = PTR_ERR(tcp_ses->tsk);
f96637be 2175 cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
63c038c2 2176 module_put(THIS_MODULE);
f7c5445a 2177 goto out_err_crypto_release;
63c038c2 2178 }
fd88ce93 2179 tcp_ses->tcpStatus = CifsNeedNegotiate;
63c038c2
JL		 2180
2181 /* thread spawned, put it on the list */
3f9bcca7 2182 spin_lock(&cifs_tcp_ses_lock);
63c038c2 2183 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
3f9bcca7 2184 spin_unlock(&cifs_tcp_ses_lock);
63c038c2 2185
488f1d2d
SJ		 2186 cifs_fscache_get_client_cookie(tcp_ses);
2187
c74093b6 2188 /* queue echo request delayed work */
da472fc8 2189 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
c74093b6 2190
63c038c2
JL		 2191 return tcp_ses;
2192
f7c5445a 2193out_err_crypto_release:
d2b91521
SP		 2194 cifs_crypto_shash_release(tcp_ses);
2195
f1d0c998
RL		 2196 put_net(cifs_net_ns(tcp_ses));
2197
63c038c2
JL		 2198out_err:
2199 if (tcp_ses) {
8347a5cd
SF		 2200 if (!IS_ERR(tcp_ses->hostname))
2201 kfree(tcp_ses->hostname);
63c038c2
JL		 2202 if (tcp_ses->ssocket)
2203 sock_release(tcp_ses->ssocket);
2204 kfree(tcp_ses);
2205 }
2206 return ERR_PTR(rc);
2207}
2208
96daf2b0 2209static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
37bb04e5 2210{
3f618223
JL		 2211 if (vol->sectype != Unspecified &&
2212 vol->sectype != ses->sectype)
2213 return 0;
2214
2215 switch (ses->sectype) {
37bb04e5 2216 case Kerberos:
64ed39dd 2217 if (!uid_eq(vol->cred_uid, ses->cred_uid))
37bb04e5
PS		 2218 return 0;
2219 break;
2220 default:
04febabc
JL		 2221 /* NULL username means anonymous session */
2222 if (ses->user_name == NULL) {
2223 if (!vol->nullauth)
2224 return 0;
2225 break;
2226 }
2227
37bb04e5 2228 /* anything else takes username/password */
04febabc
JL		 2229 if (strncmp(ses->user_name,
2230 vol->username ? vol->username : "",
8c3a2b4c 2231 CIFS_MAX_USERNAME_LEN))
37bb04e5 2232 return 0;
08b37d51 2233 if ((vol->username && strlen(vol->username) != 0) &&
37bb04e5
PS		 2234 ses->password != NULL &&
2235 strncmp(ses->password,
2236 vol->password ? vol->password : "",
8c3a2b4c 2237 CIFS_MAX_PASSWORD_LEN))
37bb04e5
PS		 2238 return 0;
2239 }
2240 return 1;
2241}
2242
96daf2b0 2243static struct cifs_ses *
4ff67b72 2244cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1da177e4 2245{
96daf2b0 2246 struct cifs_ses *ses;
dea570e0 2247
3f9bcca7 2248 spin_lock(&cifs_tcp_ses_lock);
4ff67b72 2249 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
7f48558e
SP		 2250 if (ses->status == CifsExiting)
2251 continue;
37bb04e5
PS		 2252 if (!match_session(ses, vol))
2253 continue;
14fbf50d 2254 ++ses->ses_count;
3f9bcca7 2255 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2256 return ses;
2257 }
3f9bcca7 2258 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2259 return NULL;
2260}
dea570e0 2261
14fbf50d 2262static void
96daf2b0 2263cifs_put_smb_ses(struct cifs_ses *ses)
14fbf50d 2264{
7f48558e 2265 unsigned int rc, xid;
14fbf50d 2266 struct TCP_Server_Info *server = ses->server;
dea570e0 2267
f96637be 2268 cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
7f48558e 2269
3f9bcca7 2270 spin_lock(&cifs_tcp_ses_lock);
7f48558e
SP		 2271 if (ses->status == CifsExiting) {
2272 spin_unlock(&cifs_tcp_ses_lock);
2273 return;
2274 }
14fbf50d 2275 if (--ses->ses_count > 0) {
3f9bcca7 2276 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2277 return;
2278 }
7f48558e
SP		 2279 if (ses->status == CifsGood)
2280 ses->status = CifsExiting;
3f9bcca7 2281 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2282
7f48558e 2283 if (ses->status == CifsExiting && server->ops->logoff) {
6d5786a3 2284 xid = get_xid();
7f48558e
SP		 2285 rc = server->ops->logoff(xid, ses);
2286 if (rc)
2287 cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n",
2288 __func__, rc);
6d5786a3 2289 _free_xid(xid);
14fbf50d 2290 }
7f48558e
SP		 2291
2292 spin_lock(&cifs_tcp_ses_lock);
2293 list_del_init(&ses->smb_ses_list);
2294 spin_unlock(&cifs_tcp_ses_lock);
2295
14fbf50d
JL		 2296 sesInfoFree(ses);
2297 cifs_put_tcp_session(server);
2298}
dea570e0 2299
8a8798a5
JL		 2300#ifdef CONFIG_KEYS
2301
057d6332
CG		 2302/* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
2303#define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
8a8798a5
JL		 2304
2305/* Populate username and pw fields from keyring if possible */
2306static int
2307cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2308{
2309 int rc = 0;
2310 char *desc, *delim, *payload;
2311 ssize_t len;
2312 struct key *key;
2313 struct TCP_Server_Info *server = ses->server;
2314 struct sockaddr_in *sa;
2315 struct sockaddr_in6 *sa6;
2316 struct user_key_payload *upayload;
2317
2318 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2319 if (!desc)
2320 return -ENOMEM;
2321
2322 /* try to find an address key first */
2323 switch (server->dstaddr.ss_family) {
2324 case AF_INET:
2325 sa = (struct sockaddr_in *)&server->dstaddr;
2326 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2327 break;
2328 case AF_INET6:
2329 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2330 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2331 break;
2332 default:
f96637be
JP		 2333 cifs_dbg(FYI, "Bad ss_family (%hu)\n",
2334 server->dstaddr.ss_family);
8a8798a5
JL		 2335 rc = -EINVAL;
2336 goto out_err;
2337 }
2338
f96637be 2339 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
8a8798a5
JL		 2340 key = request_key(&key_type_logon, desc, "");
2341 if (IS_ERR(key)) {
2342 if (!ses->domainName) {
f96637be 2343 cifs_dbg(FYI, "domainName is NULL\n");
8a8798a5
JL		 2344 rc = PTR_ERR(key);
2345 goto out_err;
2346 }
2347
2348 /* didn't work, try to find a domain key */
2349 sprintf(desc, "cifs:d:%s", ses->domainName);
f96637be 2350 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
8a8798a5
JL		 2351 key = request_key(&key_type_logon, desc, "");
2352 if (IS_ERR(key)) {
2353 rc = PTR_ERR(key);
2354 goto out_err;
2355 }
2356 }
2357
2358 down_read(&key->sem);
2359 upayload = key->payload.data;
2360 if (IS_ERR_OR_NULL(upayload)) {
4edc53c1 2361 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
8a8798a5
JL		 2362 goto out_key_put;
2363 }
2364
2365 /* find first : in payload */
2366 payload = (char *)upayload->data;
2367 delim = strnchr(payload, upayload->datalen, ':');
f96637be 2368 cifs_dbg(FYI, "payload=%s\n", payload);
8a8798a5 2369 if (!delim) {
f96637be
JP		 2370 cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
2371 upayload->datalen);
8a8798a5
JL		 2372 rc = -EINVAL;
2373 goto out_key_put;
2374 }
2375
2376 len = delim - payload;
8c3a2b4c 2377 if (len > CIFS_MAX_USERNAME_LEN || len <= 0) {
f96637be
JP		 2378 cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
2379 len);
8a8798a5
JL		 2380 rc = -EINVAL;
2381 goto out_key_put;
2382 }
2383
2384 vol->username = kstrndup(payload, len, GFP_KERNEL);
2385 if (!vol->username) {
f96637be
JP		 2386 cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
2387 len);
8a8798a5
JL		 2388 rc = -ENOMEM;
2389 goto out_key_put;
2390 }
f96637be 2391 cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
8a8798a5
JL		 2392
2393 len = key->datalen - (len + 1);
8c3a2b4c 2394 if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) {
f96637be 2395 cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
8a8798a5
JL		 2396 rc = -EINVAL;
2397 kfree(vol->username);
2398 vol->username = NULL;
2399 goto out_key_put;
2400 }
2401
2402 ++delim;
2403 vol->password = kstrndup(delim, len, GFP_KERNEL);
2404 if (!vol->password) {
f96637be
JP		 2405 cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
2406 len);
8a8798a5
JL		 2407 rc = -ENOMEM;
2408 kfree(vol->username);
2409 vol->username = NULL;
2410 goto out_key_put;
2411 }
2412
2413out_key_put:
2414 up_read(&key->sem);
2415 key_put(key);
2416out_err:
2417 kfree(desc);
f96637be 2418 cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
8a8798a5
JL		 2419 return rc;
2420}
2421#else /* ! CONFIG_KEYS */
2422static inline int
2423cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2424 struct cifs_ses *ses __attribute__((unused)))
2425{
2426 return -ENOSYS;
2427}
2428#endif /* CONFIG_KEYS */
2429
96daf2b0 2430static struct cifs_ses *
36988c76
JL		 2431cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2432{
286170aa
PS		 2433 int rc = -ENOMEM;
2434 unsigned int xid;
96daf2b0 2435 struct cifs_ses *ses;
a9f1b85e
PS		 2436 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2437 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
36988c76 2438
6d5786a3 2439 xid = get_xid();
36988c76 2440
4ff67b72 2441 ses = cifs_find_smb_ses(server, volume_info);
36988c76 2442 if (ses) {
f96637be
JP		 2443 cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
2444 ses->status);
36988c76 2445
36988c76 2446 mutex_lock(&ses->session_mutex);
198b5682
JL		 2447 rc = cifs_negotiate_protocol(xid, ses);
2448 if (rc) {
2449 mutex_unlock(&ses->session_mutex);
2450 /* problem -- put our ses reference */
2451 cifs_put_smb_ses(ses);
6d5786a3 2452 free_xid(xid);
198b5682
JL		 2453 return ERR_PTR(rc);
2454 }
36988c76 2455 if (ses->need_reconnect) {
f96637be 2456 cifs_dbg(FYI, "Session needs reconnect\n");
36988c76
JL		 2457 rc = cifs_setup_session(xid, ses,
2458 volume_info->local_nls);
2459 if (rc) {
2460 mutex_unlock(&ses->session_mutex);
2461 /* problem -- put our reference */
2462 cifs_put_smb_ses(ses);
6d5786a3 2463 free_xid(xid);
36988c76
JL		 2464 return ERR_PTR(rc);
2465 }
2466 }
2467 mutex_unlock(&ses->session_mutex);
460cf341
JL		 2468
2469 /* existing SMB ses has a server reference already */
2470 cifs_put_tcp_session(server);
6d5786a3 2471 free_xid(xid);
36988c76
JL		 2472 return ses;
2473 }
2474
f96637be 2475 cifs_dbg(FYI, "Existing smb sess not found\n");
36988c76
JL		 2476 ses = sesInfoAlloc();
2477 if (ses == NULL)
2478 goto get_ses_fail;
2479
2480 /* new SMB session uses our server ref */
2481 ses->server = server;
a9f1b85e
PS		 2482 if (server->dstaddr.ss_family == AF_INET6)
2483 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
36988c76 2484 else
a9f1b85e 2485 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
36988c76 2486
8727c8a8
SF		 2487 if (volume_info->username) {
2488 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2489 if (!ses->user_name)
2490 goto get_ses_fail;
2491 }
36988c76
JL		 2492
2493 /* volume_info->password freed at unmount */
2494 if (volume_info->password) {
2495 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2496 if (!ses->password)
2497 goto get_ses_fail;
2498 }
2499 if (volume_info->domainname) {
d3686d54
SP		 2500 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2501 if (!ses->domainName)
2502 goto get_ses_fail;
36988c76 2503 }
3e4b3e1f 2504 ses->cred_uid = volume_info->cred_uid;
36988c76 2505 ses->linux_uid = volume_info->linux_uid;
d9b94201 2506
28e11bd8
JL		 2507 ses->sectype = volume_info->sectype;
2508 ses->sign = volume_info->sign;
36988c76
JL		 2509
2510 mutex_lock(&ses->session_mutex);
198b5682
JL		 2511 rc = cifs_negotiate_protocol(xid, ses);
2512 if (!rc)
2513 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
36988c76 2514 mutex_unlock(&ses->session_mutex);
c8e56f1f 2515 if (rc)
36988c76
JL		 2516 goto get_ses_fail;
2517
2518 /* success, put it on the list */
3f9bcca7 2519 spin_lock(&cifs_tcp_ses_lock);
36988c76 2520 list_add(&ses->smb_ses_list, &server->smb_ses_list);
3f9bcca7 2521 spin_unlock(&cifs_tcp_ses_lock);
36988c76 2522
6d5786a3 2523 free_xid(xid);
36988c76
JL		 2524 return ses;
2525
2526get_ses_fail:
2527 sesInfoFree(ses);
6d5786a3 2528 free_xid(xid);
36988c76
JL		 2529 return ERR_PTR(rc);
2530}
2531
96daf2b0 2532static int match_tcon(struct cifs_tcon *tcon, const char *unc)
37bb04e5
PS		 2533{
2534 if (tcon->tidStatus == CifsExiting)
2535 return 0;
2536 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2537 return 0;
2538 return 1;
2539}
2540
96daf2b0
SF		 2541static struct cifs_tcon *
2542cifs_find_tcon(struct cifs_ses *ses, const char *unc)
f1987b44
JL		 2543{
2544 struct list_head *tmp;
96daf2b0 2545 struct cifs_tcon *tcon;
f1987b44 2546
3f9bcca7 2547 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2548 list_for_each(tmp, &ses->tcon_list) {
96daf2b0 2549 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
37bb04e5 2550 if (!match_tcon(tcon, unc))
f1987b44 2551 continue;
f1987b44 2552 ++tcon->tc_count;
3f9bcca7 2553 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2554 return tcon;
1da177e4 2555 }
3f9bcca7 2556 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2557 return NULL;
2558}
2559
f1987b44 2560static void
96daf2b0 2561cifs_put_tcon(struct cifs_tcon *tcon)
f1987b44 2562{
2e6e02ab 2563 unsigned int xid;
96daf2b0 2564 struct cifs_ses *ses = tcon->ses;
f1987b44 2565
f96637be 2566 cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
3f9bcca7 2567 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2568 if (--tcon->tc_count > 0) {
3f9bcca7 2569 spin_unlock(&cifs_tcp_ses_lock);
f1987b44
JL		 2570 return;
2571 }
2572
2573 list_del_init(&tcon->tcon_list);
3f9bcca7 2574 spin_unlock(&cifs_tcp_ses_lock);
f1987b44 2575
6d5786a3 2576 xid = get_xid();
2e6e02ab
PS		 2577 if (ses->server->ops->tree_disconnect)
2578 ses->server->ops->tree_disconnect(xid, tcon);
6d5786a3 2579 _free_xid(xid);
f1987b44 2580
d03382ce 2581 cifs_fscache_release_super_cookie(tcon);
9f841593 2582 tconInfoFree(tcon);
f1987b44
JL		 2583 cifs_put_smb_ses(ses);
2584}
2585
96daf2b0
SF		 2586static struct cifs_tcon *
2587cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
d00c28de
JL		 2588{
2589 int rc, xid;
96daf2b0 2590 struct cifs_tcon *tcon;
d00c28de
JL		 2591
2592 tcon = cifs_find_tcon(ses, volume_info->UNC);
2593 if (tcon) {
f96637be 2594 cifs_dbg(FYI, "Found match on UNC path\n");
d00c28de
JL		 2595 /* existing tcon already has a reference */
2596 cifs_put_smb_ses(ses);
2597 if (tcon->seal != volume_info->seal)
f96637be 2598 cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
d00c28de
JL		 2599 return tcon;
2600 }
2601
2e6e02ab
PS		 2602 if (!ses->server->ops->tree_connect) {
2603 rc = -ENOSYS;
2604 goto out_fail;
2605 }
2606
d00c28de
JL		 2607 tcon = tconInfoAlloc();
2608 if (tcon == NULL) {
2609 rc = -ENOMEM;
2610 goto out_fail;
2611 }
2612
2613 tcon->ses = ses;
2614 if (volume_info->password) {
2615 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2616 if (!tcon->password) {
2617 rc = -ENOMEM;
2618 goto out_fail;
2619 }
2620 }
2621
2e6e02ab
PS		 2622 /*
2623 * BB Do we need to wrap session_mutex around this TCon call and Unix
2624 * SetFS as we do on SessSetup and reconnect?
2625 */
6d5786a3 2626 xid = get_xid();
2e6e02ab
PS		 2627 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2628 volume_info->local_nls);
6d5786a3 2629 free_xid(xid);
f96637be 2630 cifs_dbg(FYI, "Tcon rc = %d\n", rc);
d00c28de
JL		 2631 if (rc)
2632 goto out_fail;
2633
2634 if (volume_info->nodfs) {
2635 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
f96637be 2636 cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
d00c28de
JL		 2637 }
2638 tcon->seal = volume_info->seal;
2e6e02ab
PS		 2639 /*
2640 * We can have only one retry value for a connection to a share so for
2641 * resources mounted more than once to the same server share the last
2642 * value passed in for the retry flag is used.
2643 */
d00c28de
JL		 2644 tcon->retry = volume_info->retry;
2645 tcon->nocase = volume_info->nocase;
2646 tcon->local_lease = volume_info->local_lease;
233839b1 2647 INIT_LIST_HEAD(&tcon->pending_opens);
d00c28de 2648
3f9bcca7 2649 spin_lock(&cifs_tcp_ses_lock);
d00c28de 2650 list_add(&tcon->tcon_list, &ses->tcon_list);
3f9bcca7 2651 spin_unlock(&cifs_tcp_ses_lock);
d00c28de 2652
d03382ce
SJ		 2653 cifs_fscache_get_super_cookie(tcon);
2654
d00c28de
JL		 2655 return tcon;
2656
2657out_fail:
2658 tconInfoFree(tcon);
2659 return ERR_PTR(rc);
2660}
2661
9d002df4
JL		 2662void
2663cifs_put_tlink(struct tcon_link *tlink)
2664{
2665 if (!tlink || IS_ERR(tlink))
2666 return;
2667
2668 if (!atomic_dec_and_test(&tlink->tl_count) ||
2669 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2670 tlink->tl_time = jiffies;
2671 return;
2672 }
2673
2674 if (!IS_ERR(tlink_tcon(tlink)))
2675 cifs_put_tcon(tlink_tcon(tlink));
2676 kfree(tlink);
2677 return;
2678}
d00c28de 2679
25c7f41e 2680static inline struct tcon_link *
cd51875d
PS		 2681cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2682{
2683 return cifs_sb->master_tlink;
2684}
25c7f41e
PS		 2685
2686static int
2687compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2688{
2689 struct cifs_sb_info *old = CIFS_SB(sb);
2690 struct cifs_sb_info *new = mnt_data->cifs_sb;
2691
2692 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2693 return 0;
2694
2695 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2696 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2697 return 0;
2698
25c7f41e 2699 /*
5eba8ab3
JL		 2700 * We want to share sb only if we don't specify an r/wsize or
2701 * specified r/wsize is greater than or equal to existing one.
25c7f41e
PS		 2702 */
2703 if (new->wsize && new->wsize < old->wsize)
2704 return 0;
2705
5eba8ab3
JL		 2706 if (new->rsize && new->rsize < old->rsize)
2707 return 0;
2708
1f68233c 2709 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
25c7f41e
PS		 2710 return 0;
2711
2712 if (old->mnt_file_mode != new->mnt_file_mode ||
2713 old->mnt_dir_mode != new->mnt_dir_mode)
2714 return 0;
2715
2716 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2717 return 0;
2718
2719 if (old->actimeo != new->actimeo)
2720 return 0;
2721
2722 return 1;
2723}
2724
2725int
2726cifs_match_super(struct super_block *sb, void *data)
2727{
2728 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2729 struct smb_vol *volume_info;
2730 struct cifs_sb_info *cifs_sb;
2731 struct TCP_Server_Info *tcp_srv;
96daf2b0
SF		 2732 struct cifs_ses *ses;
2733 struct cifs_tcon *tcon;
25c7f41e 2734 struct tcon_link *tlink;
25c7f41e
PS		 2735 int rc = 0;
2736
25c7f41e
PS		 2737 spin_lock(&cifs_tcp_ses_lock);
2738 cifs_sb = CIFS_SB(sb);
2739 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2740 if (IS_ERR(tlink)) {
2741 spin_unlock(&cifs_tcp_ses_lock);
2742 return rc;
2743 }
2744 tcon = tlink_tcon(tlink);
2745 ses = tcon->ses;
2746 tcp_srv = ses->server;
2747
2748 volume_info = mnt_data->vol;
2749
9fa114f7 2750 if (!match_server(tcp_srv, volume_info) ||
25c7f41e
PS		 2751 !match_session(ses, volume_info) ||
2752 !match_tcon(tcon, volume_info->UNC)) {
2753 rc = 0;
2754 goto out;
2755 }
2756
2757 rc = compare_mount_options(sb, mnt_data);
2758out:
25c7f41e 2759 spin_unlock(&cifs_tcp_ses_lock);
f484b5d0 2760 cifs_put_tlink(tlink);
25c7f41e
PS		 2761 return rc;
2762}
2763
1da177e4 2764int
b669f33c 2765get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2e6e02ab
PS		 2766 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2767 struct dfs_info3_param **referrals, int remap)
1da177e4
LT		 2768{
2769 char *temp_unc;
2770 int rc = 0;
2771
b669f33c 2772 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2e6e02ab
PS		 2773 return -ENOSYS;
2774
2775 *num_referrals = 0;
2776 *referrals = NULL;
1da177e4 2777
2e6e02ab 2778 if (ses->ipc_tid == 0) {
1da177e4 2779 temp_unc = kmalloc(2 /* for slashes */ +
2e6e02ab
PS		 2780 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2781 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
1da177e4
LT		 2782 if (temp_unc == NULL)
2783 return -ENOMEM;
2784 temp_unc[0] = '\\';
2785 temp_unc[1] = '\\';
2e6e02ab
PS		 2786 strcpy(temp_unc + 2, ses->serverName);
2787 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2788 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2789 nls_codepage);
f96637be 2790 cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid);
1da177e4
LT		 2791 kfree(temp_unc);
2792 }
2793 if (rc == 0)
b669f33c
PS		 2794 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2795 referrals, num_referrals,
2796 nls_codepage, remap);
2e6e02ab
PS		 2797 /*
2798 * BB - map targetUNCs to dfs_info3 structures, here or in
b669f33c 2799 * ses->server->ops->get_dfs_refer.
2e6e02ab 2800 */
1da177e4
LT		 2801
2802 return rc;
2803}
2804
09e50d55
JL		 2805#ifdef CONFIG_DEBUG_LOCK_ALLOC
2806static struct lock_class_key cifs_key[2];
2807static struct lock_class_key cifs_slock_key[2];
2808
2809static inline void
2810cifs_reclassify_socket4(struct socket *sock)
2811{
2812 struct sock *sk = sock->sk;
2813 BUG_ON(sock_owned_by_user(sk));
2814 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2815 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2816}
2817
2818static inline void
2819cifs_reclassify_socket6(struct socket *sock)
2820{
2821 struct sock *sk = sock->sk;
2822 BUG_ON(sock_owned_by_user(sk));
2823 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2824 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2825}
2826#else
2827static inline void
2828cifs_reclassify_socket4(struct socket *sock)
2829{
2830}
2831
2832static inline void
2833cifs_reclassify_socket6(struct socket *sock)
2834{
2835}
2836#endif
2837
1da177e4 2838/* See RFC1001 section 14 on representation of Netbios names */
50c2f753 2839static void rfc1002mangle(char *target, char *source, unsigned int length)
1da177e4 2840{
50c2f753 2841 unsigned int i, j;
1da177e4 2842
50c2f753 2843 for (i = 0, j = 0; i < (length); i++) {
1da177e4
LT		 2844 /* mask a nibble at a time and encode */
2845 target[j] = 'A' + (0x0F & (source[i] >> 4));
2846 target[j+1] = 'A' + (0x0F & source[i]);
50c2f753 2847 j += 2;
1da177e4
LT		 2848 }
2849
2850}
2851
3eb9a889
BG		 2852static int
2853bind_socket(struct TCP_Server_Info *server)
2854{
2855 int rc = 0;
2856 if (server->srcaddr.ss_family != AF_UNSPEC) {
2857 /* Bind to the specified local IP address */
2858 struct socket *socket = server->ssocket;
2859 rc = socket->ops->bind(socket,
2860 (struct sockaddr *) &server->srcaddr,
2861 sizeof(server->srcaddr));
2862 if (rc < 0) {
2863 struct sockaddr_in *saddr4;
2864 struct sockaddr_in6 *saddr6;
2865 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2866 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2867 if (saddr6->sin6_family == AF_INET6)
f96637be
JP		 2868 cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
2869 &saddr6->sin6_addr, rc);
3eb9a889 2870 else
f96637be
JP		 2871 cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
2872 &saddr4->sin_addr.s_addr, rc);
3eb9a889
BG		 2873 }
2874 }
2875 return rc;
2876}
1da177e4
LT		 2877
2878static int
a9f1b85e 2879ip_rfc1001_connect(struct TCP_Server_Info *server)
1da177e4
LT		 2880{
2881 int rc = 0;
a9f1b85e
PS		 2882 /*
2883 * some servers require RFC1001 sessinit before sending
2884 * negprot - BB check reconnection in case where second
2885 * sessinit is sent but no second negprot
2886 */
2887 struct rfc1002_session_packet *ses_init_buf;
2888 struct smb_hdr *smb_buf;
2889 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2890 GFP_KERNEL);
2891 if (ses_init_buf) {
2892 ses_init_buf->trailer.session_req.called_len = 32;
2893
2894 if (server->server_RFC1001_name &&
2895 server->server_RFC1001_name[0] != 0)
2896 rfc1002mangle(ses_init_buf->trailer.
2897 session_req.called_name,
2898 server->server_RFC1001_name,
2899 RFC1001_NAME_LEN_WITH_NULL);
2900 else
2901 rfc1002mangle(ses_init_buf->trailer.
2902 session_req.called_name,
2903 DEFAULT_CIFS_CALLED_NAME,
2904 RFC1001_NAME_LEN_WITH_NULL);
2905
2906 ses_init_buf->trailer.session_req.calling_len = 32;
2907
2908 /*
2909 * calling name ends in null (byte 16) from old smb
2910 * convention.
2911 */
2912 if (server->workstation_RFC1001_name &&
2913 server->workstation_RFC1001_name[0] != 0)
2914 rfc1002mangle(ses_init_buf->trailer.
2915 session_req.calling_name,
2916 server->workstation_RFC1001_name,
2917 RFC1001_NAME_LEN_WITH_NULL);
2918 else
2919 rfc1002mangle(ses_init_buf->trailer.
2920 session_req.calling_name,
2921 "LINUX_CIFS_CLNT",
2922 RFC1001_NAME_LEN_WITH_NULL);
2923
2924 ses_init_buf->trailer.session_req.scope1 = 0;
2925 ses_init_buf->trailer.session_req.scope2 = 0;
2926 smb_buf = (struct smb_hdr *)ses_init_buf;
2927
2928 /* sizeof RFC1002_SESSION_REQUEST with no scope */
be8e3b00 2929 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
a9f1b85e
PS		 2930 rc = smb_send(server, smb_buf, 0x44);
2931 kfree(ses_init_buf);
2932 /*
2933 * RFC1001 layer in at least one server
2934 * requires very short break before negprot
2935 * presumably because not expecting negprot
2936 * to follow so fast. This is a simple
2937 * solution that works without
2938 * complicating the code and causes no
2939 * significant slowing down on mount
2940 * for everyone else
2941 */
2942 usleep_range(1000, 2000);
2943 }
2944 /*
2945 * else the negprot may still work without this
2946 * even though malloc failed
2947 */
2948
2949 return rc;
2950}
2951
2952static int
2953generic_ip_connect(struct TCP_Server_Info *server)
2954{
2955 int rc = 0;
6da97910 2956 __be16 sport;
a9f1b85e 2957 int slen, sfamily;
bcf4b106 2958 struct socket *socket = server->ssocket;
a9f1b85e
PS		 2959 struct sockaddr *saddr;
2960
2961 saddr = (struct sockaddr *) &server->dstaddr;
2962
2963 if (server->dstaddr.ss_family == AF_INET6) {
2964 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2965 slen = sizeof(struct sockaddr_in6);
2966 sfamily = AF_INET6;
2967 } else {
2968 sport = ((struct sockaddr_in *) saddr)->sin_port;
2969 slen = sizeof(struct sockaddr_in);
2970 sfamily = AF_INET;
2971 }
1da177e4 2972
bcf4b106 2973 if (socket == NULL) {
f1d0c998
RL		 2974 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2975 IPPROTO_TCP, &socket, 1);
1da177e4 2976 if (rc < 0) {
f96637be 2977 cifs_dbg(VFS, "Error %d creating socket\n", rc);
a9f1b85e 2978 server->ssocket = NULL;
1da177e4 2979 return rc;
1da177e4 2980 }
bcf4b106
JL		 2981
2982 /* BB other socket options to set KEEPALIVE, NODELAY? */
f96637be 2983 cifs_dbg(FYI, "Socket created\n");
bcf4b106
JL		 2984 server->ssocket = socket;
2985 socket->sk->sk_allocation = GFP_NOFS;
a9f1b85e
PS		 2986 if (sfamily == AF_INET6)
2987 cifs_reclassify_socket6(socket);
2988 else
2989 cifs_reclassify_socket4(socket);
1da177e4
LT		 2990 }
2991
3eb9a889
BG		 2992 rc = bind_socket(server);
2993 if (rc < 0)
2994 return rc;
2995
bcf4b106
JL		 2996 /*
2997 * Eventually check for other socket options to change from
a9f1b85e
PS		 2998 * the default. sock_setsockopt not used because it expects
2999 * user space buffer
bcf4b106
JL		 3000 */
3001 socket->sk->sk_rcvtimeo = 7 * HZ;
da505c38 3002 socket->sk->sk_sndtimeo = 5 * HZ;
edf1ae40 3003
b387eaeb 3004 /* make the bufsizes depend on wsize/rsize and max requests */
bcf4b106
JL		 3005 if (server->noautotune) {
3006 if (socket->sk->sk_sndbuf < (200 * 1024))
3007 socket->sk->sk_sndbuf = 200 * 1024;
3008 if (socket->sk->sk_rcvbuf < (140 * 1024))
3009 socket->sk->sk_rcvbuf = 140 * 1024;
edf1ae40 3010 }
1da177e4 3011
6a5fa236 3012 if (server->tcp_nodelay) {
a9f1b85e 3013 int val = 1;
6a5fa236
SF		 3014 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
3015 (char *)&val, sizeof(val));
3016 if (rc)
f96637be
JP		 3017 cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n",
3018 rc);
6a5fa236
SF		 3019 }
3020
f96637be 3021 cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
bcf4b106 3022 socket->sk->sk_sndbuf,
b6b38f70 3023 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
bcf4b106 3024
ee1b3ea9
JL		 3025 rc = socket->ops->connect(socket, saddr, slen, 0);
3026 if (rc < 0) {
f96637be 3027 cifs_dbg(FYI, "Error %d connecting to server\n", rc);
ee1b3ea9
JL		 3028 sock_release(socket);
3029 server->ssocket = NULL;
3030 return rc;
3031 }
3032
a9f1b85e
PS		 3033 if (sport == htons(RFC1001_PORT))
3034 rc = ip_rfc1001_connect(server);
50c2f753 3035
1da177e4
LT		 3036 return rc;
3037}
3038
3039static int
a9f1b85e 3040ip_connect(struct TCP_Server_Info *server)
1da177e4 3041{
6da97910 3042 __be16 *sport;
a9f1b85e
PS		 3043 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3044 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
1da177e4 3045
a9f1b85e
PS		 3046 if (server->dstaddr.ss_family == AF_INET6)
3047 sport = &addr6->sin6_port;
3048 else
3049 sport = &addr->sin_port;
1da177e4 3050
a9f1b85e
PS		 3051 if (*sport == 0) {
3052 int rc;
1da177e4 3053
a9f1b85e
PS		 3054 /* try with 445 port at first */
3055 *sport = htons(CIFS_PORT);
3eb9a889 3056
a9f1b85e 3057 rc = generic_ip_connect(server);
1da177e4 3058 if (rc >= 0)
a9f1b85e 3059 return rc;
6a5fa236 3060
a9f1b85e
PS		 3061 /* if it failed, try with 139 port */
3062 *sport = htons(RFC1001_PORT);
6a5fa236
SF		 3063 }
3064
a9f1b85e 3065 return generic_ip_connect(server);
1da177e4
LT		 3066}
3067
6d5786a3 3068void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
2c6292ae 3069 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
8af18971
SF		 3070{
3071 /* if we are reconnecting then should we check to see if
3072 * any requested capabilities changed locally e.g. via
3073 * remount but we can not do much about it here
3074 * if they have (even if we could detect it by the following)
3075 * Perhaps we could add a backpointer to array of sb from tcon
3076 * or if we change to make all sb to same share the same
3077 * sb as NFS - then we only have one backpointer to sb.
3078 * What if we wanted to mount the server share twice once with
3079 * and once without posixacls or posix paths? */
3080 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
50c2f753 3081
c18c842b
SF		 3082 if (vol_info && vol_info->no_linux_ext) {
3083 tcon->fsUnixInfo.Capability = 0;
3084 tcon->unix_ext = 0; /* Unix Extensions disabled */
f96637be 3085 cifs_dbg(FYI, "Linux protocol extensions disabled\n");
c18c842b
SF		 3086 return;
3087 } else if (vol_info)
3088 tcon->unix_ext = 1; /* Unix Extensions supported */
3089
3090 if (tcon->unix_ext == 0) {
f96637be 3091 cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
c18c842b
SF		 3092 return;
3093 }
50c2f753 3094
fb8c4b14 3095 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
8af18971 3096 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
f96637be 3097 cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
8af18971
SF		 3098 /* check for reconnect case in which we do not
3099 want to change the mount behavior if we can avoid it */
fb8c4b14 3100 if (vol_info == NULL) {
50c2f753 3101 /* turn off POSIX ACL and PATHNAMES if not set
8af18971
SF		 3102 originally at mount time */
3103 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3104 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
11b6d645
IM		 3105 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3106 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
f96637be 3107 cifs_dbg(VFS, "POSIXPATH support change\n");
8af18971 3108 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
11b6d645 3109 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
f96637be
JP		 3110 cifs_dbg(VFS, "possible reconnect error\n");
3111 cifs_dbg(VFS, "server disabled POSIX path support\n");
11b6d645 3112 }
8af18971 3113 }
50c2f753 3114
6848b733 3115 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
f96637be 3116 cifs_dbg(VFS, "per-share encryption not supported yet\n");
6848b733 3117
8af18971 3118 cap &= CIFS_UNIX_CAP_MASK;
75865f8c 3119 if (vol_info && vol_info->no_psx_acl)
8af18971 3120 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
75865f8c 3121 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
f96637be 3122 cifs_dbg(FYI, "negotiated posix acl support\n");
2c6292ae
AV		 3123 if (cifs_sb)
3124 cifs_sb->mnt_cifs_flags |=
3125 CIFS_MOUNT_POSIXACL;
8af18971
SF		 3126 }
3127
75865f8c 3128 if (vol_info && vol_info->posix_paths == 0)
8af18971 3129 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
75865f8c 3130 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
f96637be 3131 cifs_dbg(FYI, "negotiate posix pathnames\n");
2c6292ae
AV		 3132 if (cifs_sb)
3133 cifs_sb->mnt_cifs_flags |=
8af18971
SF		 3134 CIFS_MOUNT_POSIX_PATHS;
3135 }
50c2f753 3136
f96637be 3137 cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
8af18971 3138#ifdef CONFIG_CIFS_DEBUG2
75865f8c 3139 if (cap & CIFS_UNIX_FCNTL_CAP)
f96637be 3140 cifs_dbg(FYI, "FCNTL cap\n");
75865f8c 3141 if (cap & CIFS_UNIX_EXTATTR_CAP)
f96637be 3142 cifs_dbg(FYI, "EXTATTR cap\n");
75865f8c 3143 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
f96637be 3144 cifs_dbg(FYI, "POSIX path cap\n");
75865f8c 3145 if (cap & CIFS_UNIX_XATTR_CAP)
f96637be 3146 cifs_dbg(FYI, "XATTR cap\n");
75865f8c 3147 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
f96637be 3148 cifs_dbg(FYI, "POSIX ACL cap\n");
75865f8c 3149 if (cap & CIFS_UNIX_LARGE_READ_CAP)
f96637be 3150 cifs_dbg(FYI, "very large read cap\n");
75865f8c 3151 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
f96637be 3152 cifs_dbg(FYI, "very large write cap\n");
6848b733 3153 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
f96637be 3154 cifs_dbg(FYI, "transport encryption cap\n");
6848b733 3155 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
f96637be 3156 cifs_dbg(FYI, "mandatory transport encryption cap\n");
8af18971
SF		 3157#endif /* CIFS_DEBUG2 */
3158 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
442aa310 3159 if (vol_info == NULL) {
f96637be 3160 cifs_dbg(FYI, "resetting capabilities failed\n");
442aa310 3161 } else
f96637be 3162 cifs_dbg(VFS, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n");
5a44b319 3163
8af18971
SF		 3164 }
3165 }
3166}
3167
724d9f1c
PS		 3168void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3169 struct cifs_sb_info *cifs_sb)
b1c8d2b4 3170{
2de970ff
JL		 3171 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3172
2ced6f69
AV		 3173 spin_lock_init(&cifs_sb->tlink_tree_lock);
3174 cifs_sb->tlink_tree = RB_ROOT;
3175
25c7f41e 3176 /*
5eba8ab3
JL		 3177 * Temporarily set r/wsize for matching superblock. If we end up using
3178 * new sb then client will later negotiate it downward if needed.
25c7f41e 3179 */
5eba8ab3 3180 cifs_sb->rsize = pvolume_info->rsize;
25c7f41e
PS		 3181 cifs_sb->wsize = pvolume_info->wsize;
3182
3b795210
SF		 3183 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3184 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3185 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3186 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
f96637be
JP		 3187 cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n",
3188 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3b795210 3189
6d20e840 3190 cifs_sb->actimeo = pvolume_info->actimeo;
724d9f1c 3191 cifs_sb->local_nls = pvolume_info->local_nls;
6d20e840 3192
3b795210
SF		 3193 if (pvolume_info->noperm)
3194 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3195 if (pvolume_info->setuids)
3196 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3197 if (pvolume_info->server_ino)
3198 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3199 if (pvolume_info->remap)
3200 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3201 if (pvolume_info->no_xattr)
3202 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3203 if (pvolume_info->sfu_emul)
3204 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3205 if (pvolume_info->nobrl)
3206 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
be652445 3207 if (pvolume_info->nostrictsync)
4717bed6 3208 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
13a6e42a
SF		 3209 if (pvolume_info->mand_lock)
3210 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
d4ffff1f
PS		 3211 if (pvolume_info->rwpidforward)
3212 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3b795210
SF		 3213 if (pvolume_info->cifs_acl)
3214 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3c7c87fd 3215 if (pvolume_info->backupuid_specified) {
3d3ea8e6 3216 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3c7c87fd
SP		 3217 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3218 }
3219 if (pvolume_info->backupgid_specified) {
3d3ea8e6 3220 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3c7c87fd
SP		 3221 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3222 }
3b795210
SF		 3223 if (pvolume_info->override_uid)
3224 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3225 if (pvolume_info->override_gid)
3226 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3227 if (pvolume_info->dynperm)
3228 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
fa1df75d
SJ		 3229 if (pvolume_info->fsc)
3230 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
0eb8a132
JL		 3231 if (pvolume_info->multiuser)
3232 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3233 CIFS_MOUNT_NO_PERM);
d39454ff
PS		 3234 if (pvolume_info->strict_io)
3235 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3b795210 3236 if (pvolume_info->direct_io) {
f96637be 3237 cifs_dbg(FYI, "mounting share using direct i/o\n");
3b795210
SF		 3238 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3239 }
736a3320
SM		 3240 if (pvolume_info->mfsymlinks) {
3241 if (pvolume_info->sfu_emul) {
f96637be 3242 cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n");
736a3320
SM		 3243 } else {
3244 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3245 }
3246 }
3b795210
SF		 3247
3248 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
f96637be 3249 cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
b1c8d2b4
JL		 3250}
3251
b9bce2e9
JL		 3252static void
3253cleanup_volume_info_contents(struct smb_vol *volume_info)
1bfe73c2 3254{
b946845a 3255 kfree(volume_info->username);
1bfe73c2 3256 kzfree(volume_info->password);
95c75454 3257 kfree(volume_info->UNC);
b946845a
SF		 3258 kfree(volume_info->domainname);
3259 kfree(volume_info->iocharset);
1bfe73c2 3260 kfree(volume_info->prepath);
b9bce2e9
JL		 3261}
3262
3263void
3264cifs_cleanup_volume_info(struct smb_vol *volume_info)
3265{
3266 if (!volume_info)
3267 return;
3268 cleanup_volume_info_contents(volume_info);
1bfe73c2 3269 kfree(volume_info);
1bfe73c2
IM		 3270}
3271
b9bce2e9 3272
2d6d589d 3273#ifdef CONFIG_CIFS_DFS_UPCALL
6d3ea7e4
SF		 3274/*
3275 * cifs_build_path_to_root returns full path to root when we do not have an
3276 * exiting connection (tcon)
3277 */
1bfe73c2 3278static char *
b2a0fa15 3279build_unc_path_to_root(const struct smb_vol *vol,
1bfe73c2
IM		 3280 const struct cifs_sb_info *cifs_sb)
3281{
b2a0fa15 3282 char *full_path, *pos;
839db3d1 3283 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
b2a0fa15 3284 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
1bfe73c2 3285
b2a0fa15 3286 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
1bfe73c2
IM		 3287 if (full_path == NULL)
3288 return ERR_PTR(-ENOMEM);
3289
b2a0fa15
JL		 3290 strncpy(full_path, vol->UNC, unc_len);
3291 pos = full_path + unc_len;
3292
3293 if (pplen) {
1fc29bac
JL		 3294 *pos = CIFS_DIR_SEP(cifs_sb);
3295 strncpy(pos + 1, vol->prepath, pplen);
b2a0fa15
JL		 3296 pos += pplen;
3297 }
3298
3299 *pos = '\0'; /* add trailing null */
f87d39d9 3300 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
f96637be 3301 cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path);
1bfe73c2
IM		 3302 return full_path;
3303}
dd613945
SF		 3304
3305/*
3306 * Perform a dfs referral query for a share and (optionally) prefix
3307 *
046462ab
SF		 3308 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3309 * to a string containing updated options for the submount. Otherwise it
3310 * will be left untouched.
dd613945
SF		 3311 *
3312 * Returns the rc from get_dfs_path to the caller, which can be used to
3313 * determine whether there were referrals.
3314 */
3315static int
b669f33c 3316expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
dd613945 3317 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
046462ab 3318 int check_prefix)
dd613945
SF		 3319{
3320 int rc;
3321 unsigned int num_referrals = 0;
3322 struct dfs_info3_param *referrals = NULL;
3323 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3324
3325 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3326 if (IS_ERR(full_path))
3327 return PTR_ERR(full_path);
3328
3329 /* For DFS paths, skip the first '\' of the UNC */
3330 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3331
b669f33c 3332 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
dd613945
SF		 3333 &num_referrals, &referrals,
3334 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3335
3336 if (!rc && num_referrals > 0) {
3337 char *fake_devname = NULL;
3338
3339 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3340 full_path + 1, referrals,
3341 &fake_devname);
3342
3343 free_dfs_info_array(referrals, num_referrals);
046462ab 3344
dd613945
SF		 3345 if (IS_ERR(mdata)) {
3346 rc = PTR_ERR(mdata);
3347 mdata = NULL;
b9bce2e9
JL		 3348 } else {
3349 cleanup_volume_info_contents(volume_info);
b9bce2e9
JL		 3350 rc = cifs_setup_volume_info(volume_info, mdata,
3351 fake_devname);
dd613945 3352 }
b9bce2e9
JL		 3353 kfree(fake_devname);
3354 kfree(cifs_sb->mountdata);
046462ab 3355 cifs_sb->mountdata = mdata;
dd613945
SF		 3356 }
3357 kfree(full_path);
3358 return rc;
3359}
2d6d589d 3360#endif
1bfe73c2 3361
04db79b0
JL		 3362static int
3363cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3364 const char *devname)
1da177e4 3365{
724d9f1c 3366 int rc = 0;
1da177e4 3367
04db79b0
JL		 3368 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3369 return -EINVAL;
1da177e4 3370
7586b765 3371 if (volume_info->nullauth) {
f96637be 3372 cifs_dbg(FYI, "Anonymous login\n");
04febabc
JL		 3373 kfree(volume_info->username);
3374 volume_info->username = NULL;
7586b765 3375 } else if (volume_info->username) {
1da177e4 3376 /* BB fixme parse for domain name here */
f96637be 3377 cifs_dbg(FYI, "Username: %s\n", volume_info->username);
1da177e4 3378 } else {
f96637be 3379 cifs_dbg(VFS, "No username specified\n");
50c2f753
SF		 3380 /* In userspace mount helper we can get user name from alternate
3381 locations such as env variables and files on disk */
04db79b0 3382 return -EINVAL;
1da177e4
LT		 3383 }
3384
1da177e4 3385 /* this is needed for ASCII cp to Unicode converts */
7586b765 3386 if (volume_info->iocharset == NULL) {
a5fc4ce0
JL		 3387 /* load_nls_default cannot return null */
3388 volume_info->local_nls = load_nls_default();
1da177e4 3389 } else {
a5fc4ce0
JL		 3390 volume_info->local_nls = load_nls(volume_info->iocharset);
3391 if (volume_info->local_nls == NULL) {
f96637be 3392 cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
b6b38f70 3393 volume_info->iocharset);
04db79b0 3394 return -ELIBACC;
1da177e4
LT		 3395 }
3396 }
724d9f1c 3397
724d9f1c
PS		 3398 return rc;
3399}
3400
04db79b0
JL		 3401struct smb_vol *
3402cifs_get_volume_info(char *mount_data, const char *devname)
3403{
3404 int rc;
3405 struct smb_vol *volume_info;
3406
6ee9542a 3407 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
04db79b0
JL		 3408 if (!volume_info)
3409 return ERR_PTR(-ENOMEM);
3410
3411 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3412 if (rc) {
3413 cifs_cleanup_volume_info(volume_info);
3414 volume_info = ERR_PTR(rc);
3415 }
3416
3417 return volume_info;
3418}
3419
724d9f1c 3420int
2c6292ae 3421cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
724d9f1c 3422{
1daaae8f 3423 int rc;
6d5786a3 3424 unsigned int xid;
af4281dc 3425 struct cifs_ses *ses;
96daf2b0 3426 struct cifs_tcon *tcon;
af4281dc 3427 struct TCP_Server_Info *server;
724d9f1c
PS		 3428 char *full_path;
3429 struct tcon_link *tlink;
3430#ifdef CONFIG_CIFS_DFS_UPCALL
3431 int referral_walks_count = 0;
20547490 3432#endif
dd854466
AV		 3433
3434 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3435 if (rc)
3436 return rc;
3437
20547490 3438#ifdef CONFIG_CIFS_DFS_UPCALL
724d9f1c
PS		 3439try_mount_again:
3440 /* cleanup activities if we're chasing a referral */
3441 if (referral_walks_count) {
3442 if (tcon)
3443 cifs_put_tcon(tcon);
af4281dc
PS		 3444 else if (ses)
3445 cifs_put_smb_ses(ses);
724d9f1c 3446
6d5786a3 3447 free_xid(xid);
724d9f1c
PS		 3448 }
3449#endif
1daaae8f 3450 rc = 0;
724d9f1c 3451 tcon = NULL;
af4281dc
PS		 3452 ses = NULL;
3453 server = NULL;
724d9f1c
PS		 3454 full_path = NULL;
3455 tlink = NULL;
3456
6d5786a3 3457 xid = get_xid();
1da177e4 3458
63c038c2 3459 /* get a reference to a tcp session */
af4281dc
PS		 3460 server = cifs_get_tcp_session(volume_info);
3461 if (IS_ERR(server)) {
3462 rc = PTR_ERR(server);
dd854466 3463 bdi_destroy(&cifs_sb->bdi);
63c038c2 3464 goto out;
1da177e4
LT		 3465 }
3466
36988c76 3467 /* get a reference to a SMB session */
af4281dc
PS		 3468 ses = cifs_get_smb_ses(server, volume_info);
3469 if (IS_ERR(ses)) {
3470 rc = PTR_ERR(ses);
3471 ses = NULL;
36988c76 3472 goto mount_fail_check;
1da177e4 3473 }
50c2f753 3474
d00c28de 3475 /* search for existing tcon to this server share */
af4281dc 3476 tcon = cifs_get_tcon(ses, volume_info);
d00c28de
JL		 3477 if (IS_ERR(tcon)) {
3478 rc = PTR_ERR(tcon);
3479 tcon = NULL;
1bfe73c2 3480 goto remote_path_check;
d00c28de 3481 }
1bfe73c2 3482
d82c2df5 3483 /* tell server which Unix caps we support */
29e20f9c 3484 if (cap_unix(tcon->ses)) {
d82c2df5
SF		 3485 /* reset of caps checks mount to see if unix extensions
3486 disabled for just this mount */
2c6292ae 3487 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
6848b733
SF		 3488 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3489 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3490 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3491 rc = -EACCES;
3492 goto mount_fail_check;
3493 }
3494 } else
d82c2df5 3495 tcon->unix_ext = 0; /* server does not support them */
c18c842b 3496
af4281dc
PS		 3497 /* do not care if a following call succeed - informational */
3498 if (!tcon->ipc && server->ops->qfs_tcon)
3499 server->ops->qfs_tcon(xid, tcon);
6848b733 3500
24985c53
PS		 3501 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3502 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
f7910cbd 3503
66bfaadc 3504 /* tune readahead according to rsize */
8f71465c 3505 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
f7910cbd 3506
1bfe73c2 3507remote_path_check:
c1508ca2
SF		 3508#ifdef CONFIG_CIFS_DFS_UPCALL
3509 /*
3510 * Perform an unconditional check for whether there are DFS
3511 * referrals for this path without prefix, to provide support
3512 * for DFS referrals from w2k8 servers which don't seem to respond
3513 * with PATH_NOT_COVERED to requests that include the prefix.
3514 * Chase the referral if found, otherwise continue normally.
3515 */
3516 if (referral_walks_count == 0) {
af4281dc
PS		 3517 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3518 false);
c1508ca2
SF		 3519 if (!refrc) {
3520 referral_walks_count++;
3521 goto try_mount_again;
3522 }
3523 }
3524#endif
3525
f87d39d9 3526 /* check if a whole path is not remote */
70945643 3527 if (!rc && tcon) {
68889f26
PS		 3528 if (!server->ops->is_path_accessible) {
3529 rc = -ENOSYS;
3530 goto mount_fail_check;
3531 }
6d3ea7e4
SF		 3532 /*
3533 * cifs_build_path_to_root works only when we have a valid tcon
3534 */
3535 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
e4cce94c
IM		 3536 if (full_path == NULL) {
3537 rc = -ENOMEM;
3538 goto mount_fail_check;
3539 }
68889f26
PS		 3540 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3541 full_path);
03ceace5 3542 if (rc != 0 && rc != -EREMOTE) {
e4cce94c
IM		 3543 kfree(full_path);
3544 goto mount_fail_check;
3545 }
3546 kfree(full_path);
3547 }
3548
1bfe73c2
IM		 3549 /* get referral if needed */
3550 if (rc == -EREMOTE) {
d036f50f 3551#ifdef CONFIG_CIFS_DFS_UPCALL
5c2503a8
IM		 3552 if (referral_walks_count > MAX_NESTED_LINKS) {
3553 /*
3554 * BB: when we implement proper loop detection,
3555 * we will remove this check. But now we need it
3556 * to prevent an indefinite loop if 'DFS tree' is
3557 * misconfigured (i.e. has loops).
3558 */
3559 rc = -ELOOP;
3560 goto mount_fail_check;
3561 }
1bfe73c2 3562
af4281dc 3563 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
7b91e266 3564
dd613945 3565 if (!rc) {
5c2503a8 3566 referral_walks_count++;
1bfe73c2
IM		 3567 goto try_mount_again;
3568 }
dd613945 3569 goto mount_fail_check;
d036f50f
SF		 3570#else /* No DFS support, return error on mount */
3571 rc = -EOPNOTSUPP;
3572#endif
1bfe73c2
IM		 3573 }
3574
9d002df4
JL		 3575 if (rc)
3576 goto mount_fail_check;
3577
3578 /* now, hang the tcon off of the superblock */
3579 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3580 if (tlink == NULL) {
3581 rc = -ENOMEM;
3582 goto mount_fail_check;
3583 }
3584
af4281dc 3585 tlink->tl_uid = ses->linux_uid;
9d002df4
JL		 3586 tlink->tl_tcon = tcon;
3587 tlink->tl_time = jiffies;
3588 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3589 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3590
b647c35f 3591 cifs_sb->master_tlink = tlink;
9d002df4 3592 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 3593 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
9d002df4 3594 spin_unlock(&cifs_sb->tlink_tree_lock);
413e661c 3595
da472fc8 3596 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 3597 TLINK_IDLE_EXPIRE);
3598
1bfe73c2
IM		 3599mount_fail_check:
3600 /* on error free sesinfo and tcon struct if needed */
3601 if (rc) {
1bfe73c2 3602 /* If find_unc succeeded then rc == 0 so we can not end */
25985edc 3603 /* up accidentally freeing someone elses tcon struct */
1bfe73c2
IM		 3604 if (tcon)
3605 cifs_put_tcon(tcon);
af4281dc
PS		 3606 else if (ses)
3607 cifs_put_smb_ses(ses);
1bfe73c2 3608 else
af4281dc 3609 cifs_put_tcp_session(server);
dd854466 3610 bdi_destroy(&cifs_sb->bdi);
1bfe73c2
IM		 3611 }
3612
70fe7dc0 3613out:
6d5786a3 3614 free_xid(xid);
1da177e4
LT		 3615 return rc;
3616}
3617
8d1bca32
JL		 3618/*
3619 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3620 * pointer may be NULL.
3621 */
1da177e4 3622int
2e6e02ab 3623CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
96daf2b0 3624 const char *tree, struct cifs_tcon *tcon,
1da177e4
LT		 3625 const struct nls_table *nls_codepage)
3626{
3627 struct smb_hdr *smb_buffer;
3628 struct smb_hdr *smb_buffer_response;
3629 TCONX_REQ *pSMB;
3630 TCONX_RSP *pSMBr;
3631 unsigned char *bcc_ptr;
3632 int rc = 0;
690c522f
JL		 3633 int length;
3634 __u16 bytes_left, count;
1da177e4
LT		 3635
3636 if (ses == NULL)
3637 return -EIO;
3638
3639 smb_buffer = cifs_buf_get();
ca43e3be 3640 if (smb_buffer == NULL)
1da177e4 3641 return -ENOMEM;
ca43e3be 3642
1da177e4
LT		 3643 smb_buffer_response = smb_buffer;
3644
3645 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3646 NULL /*no tid */ , 4 /*wct */ );
1982c344 3647
88257360 3648 smb_buffer->Mid = get_next_mid(ses->server);
1da177e4
LT		 3649 smb_buffer->Uid = ses->Suid;
3650 pSMB = (TCONX_REQ *) smb_buffer;
3651 pSMBr = (TCONX_RSP *) smb_buffer_response;
3652
3653 pSMB->AndXCommand = 0xFF;
3654 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
1da177e4 3655 bcc_ptr = &pSMB->Password[0];
8d1bca32 3656 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
eeac8047 3657 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
7c7b25bc 3658 *bcc_ptr = 0; /* password is null byte */
eeac8047 3659 bcc_ptr++; /* skip password */
7c7b25bc 3660 /* already aligned so no need to do it below */
eeac8047 3661 } else {
540b2e37 3662 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
eeac8047
SF		 3663 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3664 specified as required (when that support is added to
3665 the vfs in the future) as only NTLM or the much
7c7b25bc 3666 weaker LANMAN (which we do not send by default) is accepted
eeac8047
SF		 3667 by Samba (not sure whether other servers allow
3668 NTLMv2 password here) */
7c7b25bc 3669#ifdef CONFIG_CIFS_WEAK_PW_HASH
04912d6a 3670 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
3f618223 3671 (ses->sectype == LANMAN))
d3ba50b1 3672 calc_lanman_hash(tcon->password, ses->server->cryptkey,
96daf2b0 3673 ses->server->sec_mode &
4e53a3fb
JL		 3674 SECMODE_PW_ENCRYPT ? true : false,
3675 bcc_ptr);
7c7b25bc
SF		 3676 else
3677#endif /* CIFS_WEAK_PW_HASH */
ee2c9258 3678 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
9ef5992e 3679 bcc_ptr, nls_codepage);
eeac8047 3680
540b2e37 3681 bcc_ptr += CIFS_AUTH_RESP_SIZE;
fb8c4b14 3682 if (ses->capabilities & CAP_UNICODE) {
7c7b25bc
SF		 3683 /* must align unicode strings */
3684 *bcc_ptr = 0; /* null byte password */
3685 bcc_ptr++;
3686 }
eeac8047 3687 }
1da177e4 3688
38d77c50 3689 if (ses->server->sign)
1da177e4
LT		 3690 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3691
3692 if (ses->capabilities & CAP_STATUS32) {
3693 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3694 }
3695 if (ses->capabilities & CAP_DFS) {
3696 smb_buffer->Flags2 |= SMBFLG2_DFS;
3697 }
3698 if (ses->capabilities & CAP_UNICODE) {
3699 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3700 length =
acbbb76a 3701 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
50c2f753 3702 6 /* max utf8 char length in bytes */ *
a878fb22
SF		 3703 (/* server len*/ + 256 /* share len */), nls_codepage);
3704 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
1da177e4
LT		 3705 bcc_ptr += 2; /* skip trailing null */
3706 } else { /* ASCII */
1da177e4
LT		 3707 strcpy(bcc_ptr, tree);
3708 bcc_ptr += strlen(tree) + 1;
3709 }
3710 strcpy(bcc_ptr, "?????");
3711 bcc_ptr += strlen("?????");
3712 bcc_ptr += 1;
3713 count = bcc_ptr - &pSMB->Password[0];
be8e3b00
SF		 3714 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3715 pSMB->hdr.smb_buf_length) + count);
1da177e4
LT		 3716 pSMB->ByteCount = cpu_to_le16(count);
3717
133672ef 3718 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
7749981e 3719 0);
1da177e4 3720
1da177e4
LT		 3721 /* above now done in SendReceive */
3722 if ((rc == 0) && (tcon != NULL)) {
0e0d2cf3
SF		 3723 bool is_unicode;
3724
1da177e4 3725 tcon->tidStatus = CifsGood;
3b795210 3726 tcon->need_reconnect = false;
1da177e4
LT		 3727 tcon->tid = smb_buffer_response->Tid;
3728 bcc_ptr = pByteArea(smb_buffer_response);
690c522f 3729 bytes_left = get_bcc(smb_buffer_response);
cc20c031 3730 length = strnlen(bcc_ptr, bytes_left - 2);
0e0d2cf3
SF		 3731 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3732 is_unicode = true;
3733 else
3734 is_unicode = false;
3735
cc20c031 3736
50c2f753 3737 /* skip service field (NB: this field is always ASCII) */
7f8ed420
SF		 3738 if (length == 3) {
3739 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3740 (bcc_ptr[2] == 'C')) {
f96637be 3741 cifs_dbg(FYI, "IPC connection\n");
7f8ed420
SF		 3742 tcon->ipc = 1;
3743 }
3744 } else if (length == 2) {
3745 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3746 /* the most common case */
f96637be 3747 cifs_dbg(FYI, "disk share connection\n");
7f8ed420
SF		 3748 }
3749 }
50c2f753 3750 bcc_ptr += length + 1;
cc20c031 3751 bytes_left -= (length + 1);
46b51d08 3752 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
cc20c031
JL		 3753
3754 /* mostly informational -- no need to fail on error here */
90a98b2f 3755 kfree(tcon->nativeFileSystem);
acbbb76a 3756 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
0e0d2cf3 3757 bytes_left, is_unicode,
cc20c031
JL		 3758 nls_codepage);
3759
f96637be 3760 cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
cc20c031 3761
fb8c4b14 3762 if ((smb_buffer_response->WordCount == 3) ||
1a4e15a0
SF		 3763 (smb_buffer_response->WordCount == 7))
3764 /* field is in same location */
3979877e
SF		 3765 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3766 else
3767 tcon->Flags = 0;
f96637be 3768 cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
1da177e4 3769 } else if ((rc == 0) && tcon == NULL) {
50c2f753 3770 /* all we need to save for IPC$ connection */
1da177e4
LT		 3771 ses->ipc_tid = smb_buffer_response->Tid;
3772 }
3773
a8a11d39 3774 cifs_buf_release(smb_buffer);
1da177e4
LT		 3775 return rc;
3776}
3777
2e32cf5e
AV		 3778static void delayed_free(struct rcu_head *p)
3779{
3780 struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu);
3781 unload_nls(sbi->local_nls);
3782 kfree(sbi);
3783}
3784
2a9b9951
AV		 3785void
3786cifs_umount(struct cifs_sb_info *cifs_sb)
1da177e4 3787{
b647c35f
JL		 3788 struct rb_root *root = &cifs_sb->tlink_tree;
3789 struct rb_node *node;
3790 struct tcon_link *tlink;
9d002df4 3791
2de970ff
JL		 3792 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3793
b647c35f
JL		 3794 spin_lock(&cifs_sb->tlink_tree_lock);
3795 while ((node = rb_first(root))) {
3796 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3797 cifs_get_tlink(tlink);
3798 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3799 rb_erase(node, root);
1da177e4 3800
b647c35f
JL		 3801 spin_unlock(&cifs_sb->tlink_tree_lock);
3802 cifs_put_tlink(tlink);
3803 spin_lock(&cifs_sb->tlink_tree_lock);
3804 }
3805 spin_unlock(&cifs_sb->tlink_tree_lock);
50c2f753 3806
dd854466 3807 bdi_destroy(&cifs_sb->bdi);
d757d71b 3808 kfree(cifs_sb->mountdata);
2e32cf5e 3809 call_rcu(&cifs_sb->rcu, delayed_free);
50c2f753 3810}
1da177e4 3811
286170aa
PS		 3812int
3813cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
1da177e4
LT		 3814{
3815 int rc = 0;
198b5682 3816 struct TCP_Server_Info *server = ses->server;
1da177e4 3817
286170aa
PS		 3818 if (!server->ops->need_neg || !server->ops->negotiate)
3819 return -ENOSYS;
3820
198b5682 3821 /* only send once per connect */
286170aa 3822 if (!server->ops->need_neg(server))
198b5682
JL		 3823 return 0;
3824
45275789 3825 set_credits(server, 1);
286170aa
PS		 3826
3827 rc = server->ops->negotiate(xid, ses);
198b5682
JL		 3828 if (rc == 0) {
3829 spin_lock(&GlobalMid_Lock);
7fdbaa1b 3830 if (server->tcpStatus == CifsNeedNegotiate)
198b5682
JL		 3831 server->tcpStatus = CifsGood;
3832 else
3833 rc = -EHOSTDOWN;
3834 spin_unlock(&GlobalMid_Lock);
198b5682
JL		 3835 }
3836
3837 return rc;
3838}
3839
58c45c58
PS		 3840int
3841cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3842 struct nls_table *nls_info)
198b5682 3843{
58c45c58 3844 int rc = -ENOSYS;
198b5682 3845 struct TCP_Server_Info *server = ses->server;
26b994fa 3846
198b5682 3847 ses->capabilities = server->capabilities;
26b994fa 3848 if (linuxExtEnabled == 0)
29e20f9c 3849 ses->capabilities &= (~server->vals->cap_unix);
20418acd 3850
f96637be 3851 cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
96daf2b0 3852 server->sec_mode, server->capabilities, server->timeAdj);
cb7691b6 3853
58c45c58
PS		 3854 if (server->ops->sess_setup)
3855 rc = server->ops->sess_setup(xid, ses, nls_info);
3856
d4e63bd6 3857 if (rc)
f96637be 3858 cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
21e73393 3859
1da177e4
LT		 3860 return rc;
3861}
3862
8a8798a5
JL		 3863static int
3864cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3865{
3f618223
JL		 3866 vol->sectype = ses->sectype;
3867
3868 /* krb5 is special, since we don't need username or pw */
3869 if (vol->sectype == Kerberos)
8a8798a5 3870 return 0;
8a8798a5
JL		 3871
3872 return cifs_set_cifscreds(vol, ses);
3873}
3874
96daf2b0 3875static struct cifs_tcon *
6d4a0832 3876cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
9d002df4 3877{
8a8798a5 3878 int rc;
96daf2b0
SF		 3879 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3880 struct cifs_ses *ses;
3881 struct cifs_tcon *tcon = NULL;
9d002df4 3882 struct smb_vol *vol_info;
9d002df4
JL		 3883
3884 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
803ab977
DC		 3885 if (vol_info == NULL)
3886 return ERR_PTR(-ENOMEM);
9d002df4 3887
9d002df4
JL		 3888 vol_info->local_nls = cifs_sb->local_nls;
3889 vol_info->linux_uid = fsuid;
3890 vol_info->cred_uid = fsuid;
3891 vol_info->UNC = master_tcon->treeName;
3892 vol_info->retry = master_tcon->retry;
3893 vol_info->nocase = master_tcon->nocase;
3894 vol_info->local_lease = master_tcon->local_lease;
3895 vol_info->no_linux_ext = !master_tcon->unix_ext;
28e11bd8
JL		 3896 vol_info->sectype = master_tcon->ses->sectype;
3897 vol_info->sign = master_tcon->ses->sign;
9d002df4 3898
8a8798a5
JL		 3899 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3900 if (rc) {
3901 tcon = ERR_PTR(rc);
3902 goto out;
3903 }
9d002df4
JL		 3904
3905 /* get a reference for the same TCP session */
3f9bcca7 3906 spin_lock(&cifs_tcp_ses_lock);
9d002df4 3907 ++master_tcon->ses->server->srv_count;
3f9bcca7 3908 spin_unlock(&cifs_tcp_ses_lock);
9d002df4
JL		 3909
3910 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3911 if (IS_ERR(ses)) {
96daf2b0 3912 tcon = (struct cifs_tcon *)ses;
9d002df4
JL		 3913 cifs_put_tcp_session(master_tcon->ses->server);
3914 goto out;
3915 }
3916
3917 tcon = cifs_get_tcon(ses, vol_info);
3918 if (IS_ERR(tcon)) {
3919 cifs_put_smb_ses(ses);
3920 goto out;
3921 }
3922
29e20f9c 3923 if (cap_unix(ses))
9d002df4
JL		 3924 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3925out:
8a8798a5
JL		 3926 kfree(vol_info->username);
3927 kfree(vol_info->password);
9d002df4
JL		 3928 kfree(vol_info);
3929
3930 return tcon;
3931}
3932
96daf2b0 3933struct cifs_tcon *
9d002df4
JL		 3934cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3935{
3936 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3937}
3938
b647c35f
JL		 3939/* find and return a tlink with given uid */
3940static struct tcon_link *
6d4a0832 3941tlink_rb_search(struct rb_root *root, kuid_t uid)
b647c35f
JL		 3942{
3943 struct rb_node *node = root->rb_node;
3944 struct tcon_link *tlink;
3945
3946 while (node) {
3947 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3948
6d4a0832 3949 if (uid_gt(tlink->tl_uid, uid))
b647c35f 3950 node = node->rb_left;
6d4a0832 3951 else if (uid_lt(tlink->tl_uid, uid))
b647c35f
JL		 3952 node = node->rb_right;
3953 else
3954 return tlink;
3955 }
3956 return NULL;
3957}
3958
3959/* insert a tcon_link into the tree */
3960static void
3961tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3962{
3963 struct rb_node **new = &(root->rb_node), *parent = NULL;
3964 struct tcon_link *tlink;
3965
3966 while (*new) {
3967 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3968 parent = *new;
3969
6d4a0832 3970 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
b647c35f
JL		 3971 new = &((*new)->rb_left);
3972 else
3973 new = &((*new)->rb_right);
3974 }
3975
3976 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3977 rb_insert_color(&new_tlink->tl_rbnode, root);
3978}
3979
9d002df4
JL		 3980/*
3981 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3982 * current task.
3983 *
3984 * If the superblock doesn't refer to a multiuser mount, then just return
3985 * the master tcon for the mount.
3986 *
6ef933a3 3987 * First, search the rbtree for an existing tcon for this fsuid. If one
9d002df4
JL		 3988 * exists, then check to see if it's pending construction. If it is then wait
3989 * for construction to complete. Once it's no longer pending, check to see if
3990 * it failed and either return an error or retry construction, depending on
3991 * the timeout.
3992 *
3993 * If one doesn't exist then insert a new tcon_link struct into the tree and
3994 * try to construct a new one.
3995 */
3996struct tcon_link *
3997cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
3998{
3999 int ret;
6d4a0832 4000 kuid_t fsuid = current_fsuid();
9d002df4
JL		 4001 struct tcon_link *tlink, *newtlink;
4002
4003 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4004 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4005
4006 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 4007 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4008 if (tlink)
4009 cifs_get_tlink(tlink);
4010 spin_unlock(&cifs_sb->tlink_tree_lock);
4011
4012 if (tlink == NULL) {
4013 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4014 if (newtlink == NULL)
4015 return ERR_PTR(-ENOMEM);
b647c35f 4016 newtlink->tl_uid = fsuid;
9d002df4
JL		 4017 newtlink->tl_tcon = ERR_PTR(-EACCES);
4018 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4019 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4020 cifs_get_tlink(newtlink);
4021
9d002df4
JL		 4022 spin_lock(&cifs_sb->tlink_tree_lock);
4023 /* was one inserted after previous search? */
b647c35f 4024 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4025 if (tlink) {
4026 cifs_get_tlink(tlink);
4027 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4028 kfree(newtlink);
4029 goto wait_for_construction;
4030 }
9d002df4 4031 tlink = newtlink;
b647c35f
JL		 4032 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4033 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4034 } else {
4035wait_for_construction:
4036 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
9d002df4
JL		 4037 TASK_INTERRUPTIBLE);
4038 if (ret) {
4039 cifs_put_tlink(tlink);
74316201 4040 return ERR_PTR(-ERESTARTSYS);
9d002df4
JL		 4041 }
4042
4043 /* if it's good, return it */
4044 if (!IS_ERR(tlink->tl_tcon))
4045 return tlink;
4046
4047 /* return error if we tried this already recently */
4048 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4049 cifs_put_tlink(tlink);
4050 return ERR_PTR(-EACCES);
4051 }
4052
4053 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4054 goto wait_for_construction;
4055 }
4056
4057 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4058 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4059 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4060
4061 if (IS_ERR(tlink->tl_tcon)) {
4062 cifs_put_tlink(tlink);
4063 return ERR_PTR(-EACCES);
4064 }
4065
4066 return tlink;
4067}
2de970ff
JL		 4068
4069/*
4070 * periodic workqueue job that scans tcon_tree for a superblock and closes
4071 * out tcons.
4072 */
4073static void
4074cifs_prune_tlinks(struct work_struct *work)
4075{
4076 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4077 prune_tlinks.work);
b647c35f
JL		 4078 struct rb_root *root = &cifs_sb->tlink_tree;
4079 struct rb_node *node = rb_first(root);
4080 struct rb_node *tmp;
4081 struct tcon_link *tlink;
2de970ff 4082
b647c35f
JL		 4083 /*
4084 * Because we drop the spinlock in the loop in order to put the tlink
4085 * it's not guarded against removal of links from the tree. The only
4086 * places that remove entries from the tree are this function and
4087 * umounts. Because this function is non-reentrant and is canceled
4088 * before umount can proceed, this is safe.
4089 */
4090 spin_lock(&cifs_sb->tlink_tree_lock);
4091 node = rb_first(root);
4092 while (node != NULL) {
4093 tmp = node;
4094 node = rb_next(tmp);
4095 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4096
4097 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4098 atomic_read(&tlink->tl_count) != 0 ||
4099 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4100 continue;
2de970ff 4101
b647c35f
JL		 4102 cifs_get_tlink(tlink);
4103 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4104 rb_erase(tmp, root);
4105
4106 spin_unlock(&cifs_sb->tlink_tree_lock);
4107 cifs_put_tlink(tlink);
4108 spin_lock(&cifs_sb->tlink_tree_lock);
4109 }
4110 spin_unlock(&cifs_sb->tlink_tree_lock);
2de970ff 4111
da472fc8 4112 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 4113 TLINK_IDLE_EXPIRE);
4114}
Linux kernel - Deliverables
This page took 0.930908 seconds and 5 git commands to generate.