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cifs: remove support for CIFS_IOC_CHECKUMOUNT ioctl
[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,
70 Opt_noblocksend, Opt_noautotune,
71 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
72 Opt_mapchars, Opt_nomapchars, Opt_sfu,
73 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
74 Opt_noposixpaths, Opt_nounix,
75 Opt_nocase,
76 Opt_brl, Opt_nobrl,
77 Opt_forcemandatorylock, Opt_setuids,
78 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
79 Opt_nohard, Opt_nosoft,
80 Opt_nointr, Opt_intr,
81 Opt_nostrictsync, Opt_strictsync,
82 Opt_serverino, Opt_noserverino,
83 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
84 Opt_acl, Opt_noacl, Opt_locallease,
85 Opt_sign, Opt_seal, Opt_direct,
86 Opt_strictcache, Opt_noac,
87 Opt_fsc, Opt_mfsymlinks,
d8162558 88 Opt_multiuser, Opt_sloppy,
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,
98 Opt_unc, Opt_domain,
99 Opt_srcaddr, Opt_prefixpath,
100 Opt_iocharset, Opt_sockopt,
101 Opt_netbiosname, Opt_servern,
23db65f5 102 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
8830d7e0
SP		 103
104 /* Mount options to be ignored */
105 Opt_ignore,
106
107 /* Options which could be blank */
108 Opt_blank_pass,
4fe9e963
SP		 109 Opt_blank_user,
110 Opt_blank_ip,
8830d7e0
SP		 111
112 Opt_err
113};
114
115static const match_table_t cifs_mount_option_tokens = {
116
117 { Opt_user_xattr, "user_xattr" },
118 { Opt_nouser_xattr, "nouser_xattr" },
119 { Opt_forceuid, "forceuid" },
120 { Opt_noforceuid, "noforceuid" },
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" },
163 { Opt_direct, "direct" },
531c8ff0
JL		 164 { Opt_direct, "directio" },
165 { Opt_direct, "forcedirectio" },
8830d7e0
SP		 166 { Opt_strictcache, "strictcache" },
167 { Opt_noac, "noac" },
168 { Opt_fsc, "fsc" },
169 { Opt_mfsymlinks, "mfsymlinks" },
170 { Opt_multiuser, "multiuser" },
d8162558 171 { Opt_sloppy, "sloppy" },
8830d7e0
SP		 172
173 { Opt_backupuid, "backupuid=%s" },
174 { Opt_backupgid, "backupgid=%s" },
175 { Opt_uid, "uid=%s" },
176 { Opt_cruid, "cruid=%s" },
177 { Opt_gid, "gid=%s" },
178 { Opt_file_mode, "file_mode=%s" },
179 { Opt_dirmode, "dirmode=%s" },
180 { Opt_dirmode, "dir_mode=%s" },
181 { Opt_port, "port=%s" },
182 { Opt_rsize, "rsize=%s" },
183 { Opt_wsize, "wsize=%s" },
184 { Opt_actimeo, "actimeo=%s" },
185
4fe9e963
SP		 186 { Opt_blank_user, "user=" },
187 { Opt_blank_user, "username=" },
8830d7e0
SP		 188 { Opt_user, "user=%s" },
189 { Opt_user, "username=%s" },
190 { Opt_blank_pass, "pass=" },
191 { Opt_pass, "pass=%s" },
192 { Opt_pass, "password=%s" },
4fe9e963
SP		 193 { Opt_blank_ip, "ip=" },
194 { Opt_blank_ip, "addr=" },
8830d7e0
SP		 195 { Opt_ip, "ip=%s" },
196 { Opt_ip, "addr=%s" },
197 { Opt_unc, "unc=%s" },
198 { Opt_unc, "target=%s" },
199 { Opt_unc, "path=%s" },
200 { Opt_domain, "dom=%s" },
201 { Opt_domain, "domain=%s" },
202 { Opt_domain, "workgroup=%s" },
203 { Opt_srcaddr, "srcaddr=%s" },
204 { Opt_prefixpath, "prefixpath=%s" },
205 { Opt_iocharset, "iocharset=%s" },
206 { Opt_sockopt, "sockopt=%s" },
207 { Opt_netbiosname, "netbiosname=%s" },
208 { Opt_servern, "servern=%s" },
209 { Opt_ver, "ver=%s" },
23db65f5 210 { Opt_vers, "vers=%s" },
8830d7e0 211 { Opt_sec, "sec=%s" },
15b6a473 212 { Opt_cache, "cache=%s" },
8830d7e0
SP		 213
214 { Opt_ignore, "cred" },
215 { Opt_ignore, "credentials" },
a557b976
JL		 216 { Opt_ignore, "cred=%s" },
217 { Opt_ignore, "credentials=%s" },
8830d7e0
SP		 218 { Opt_ignore, "guest" },
219 { Opt_ignore, "rw" },
220 { Opt_ignore, "ro" },
221 { Opt_ignore, "suid" },
222 { Opt_ignore, "nosuid" },
223 { Opt_ignore, "exec" },
224 { Opt_ignore, "noexec" },
225 { Opt_ignore, "nodev" },
226 { Opt_ignore, "noauto" },
227 { Opt_ignore, "dev" },
228 { Opt_ignore, "mand" },
229 { Opt_ignore, "nomand" },
230 { Opt_ignore, "_netdev" },
231
232 { Opt_err, NULL }
233};
234
235enum {
236 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
237 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
7659624f
JL		 238 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
239 Opt_sec_ntlmv2i, Opt_sec_lanman,
8830d7e0
SP		 240 Opt_sec_none,
241
242 Opt_sec_err
243};
244
245static const match_table_t cifs_secflavor_tokens = {
246 { Opt_sec_krb5, "krb5" },
247 { Opt_sec_krb5i, "krb5i" },
248 { Opt_sec_krb5p, "krb5p" },
249 { Opt_sec_ntlmsspi, "ntlmsspi" },
250 { Opt_sec_ntlmssp, "ntlmssp" },
251 { Opt_ntlm, "ntlm" },
252 { Opt_sec_ntlmi, "ntlmi" },
7659624f
JL		 253 { Opt_sec_ntlmv2, "nontlm" },
254 { Opt_sec_ntlmv2, "ntlmv2" },
8830d7e0 255 { Opt_sec_ntlmv2i, "ntlmv2i" },
8830d7e0
SP		 256 { Opt_sec_lanman, "lanman" },
257 { Opt_sec_none, "none" },
258
259 { Opt_sec_err, NULL }
260};
261
15b6a473
JL		 262/* cache flavors */
263enum {
264 Opt_cache_loose,
265 Opt_cache_strict,
266 Opt_cache_none,
267 Opt_cache_err
268};
269
270static const match_table_t cifs_cacheflavor_tokens = {
271 { Opt_cache_loose, "loose" },
272 { Opt_cache_strict, "strict" },
273 { Opt_cache_none, "none" },
274 { Opt_cache_err, NULL }
275};
276
23db65f5
JL		 277static const match_table_t cifs_smb_version_tokens = {
278 { Smb_1, SMB1_VERSION_STRING },
1080ef75 279 { Smb_21, SMB21_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
b6b38f70 321 cFYI(1, "Reconnecting tcp session");
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 */
2b84a36c 325 cFYI(1, "%s: marking sessions and tcons for reconnect", __func__);
3f9bcca7 326 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 327 list_for_each(tmp, &server->smb_ses_list) {
96daf2b0 328 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
14fbf50d
JL		 329 ses->need_reconnect = true;
330 ses->ipc_tid = 0;
f1987b44 331 list_for_each(tmp2, &ses->tcon_list) {
96daf2b0 332 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
3b795210 333 tcon->need_reconnect = true;
1da177e4 334 }
1da177e4 335 }
3f9bcca7 336 spin_unlock(&cifs_tcp_ses_lock);
2b84a36c 337
1da177e4 338 /* do not want to be sending data on a socket we are freeing */
2b84a36c 339 cFYI(1, "%s: tearing down socket", __func__);
72ca545b 340 mutex_lock(&server->srv_mutex);
fb8c4b14 341 if (server->ssocket) {
b6b38f70
JP		 342 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
343 server->ssocket->flags);
91cf45f0 344 kernel_sock_shutdown(server->ssocket, SHUT_WR);
b6b38f70 345 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
467a8f8d 346 server->ssocket->state,
b6b38f70 347 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
JL		 360 INIT_LIST_HEAD(&retry_list);
361 cFYI(1, "%s: moving mids to private list", __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
371 cFYI(1, "%s: issuing mid callbacks", __func__);
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 */
382 rc = generic_ip_connect(server);
fb8c4b14 383 if (rc) {
b6b38f70 384 cFYI(1, "reconnect error %d", rc);
0cb766ae 385 msleep(3000);
1da177e4
LT		 386 } else {
387 atomic_inc(&tcpSesReconnectCount);
388 spin_lock(&GlobalMid_Lock);
469ee614 389 if (server->tcpStatus != CifsExiting)
fd88ce93 390 server->tcpStatus = CifsNeedNegotiate;
fb8c4b14 391 spin_unlock(&GlobalMid_Lock);
1da177e4 392 }
7fdbaa1b 393 } while (server->tcpStatus == CifsNeedReconnect);
2b84a36c 394
1da177e4
LT		 395 return rc;
396}
397
c74093b6
JL		 398static void
399cifs_echo_request(struct work_struct *work)
400{
401 int rc;
402 struct TCP_Server_Info *server = container_of(work,
403 struct TCP_Server_Info, echo.work);
404
247ec9b4 405 /*
f6d76178
PS		 406 * We cannot send an echo if it is disabled or until the
407 * NEGOTIATE_PROTOCOL request is done, which is indicated by
408 * server->ops->need_neg() == true. Also, no need to ping if
409 * we got a response recently.
247ec9b4 410 */
286170aa 411 if (!server->ops->need_neg || server->ops->need_neg(server) ||
f6d76178 412 (server->ops->can_echo && !server->ops->can_echo(server)) ||
247ec9b4 413 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
c74093b6
JL		 414 goto requeue_echo;
415
f6d76178 416 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
c74093b6
JL		 417 if (rc)
418 cFYI(1, "Unable to send echo request to server: %s",
419 server->hostname);
420
421requeue_echo:
da472fc8 422 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
c74093b6
JL		 423}
424
3d9c2472 425static bool
2a37ef94 426allocate_buffers(struct TCP_Server_Info *server)
3d9c2472 427{
2a37ef94
JL		 428 if (!server->bigbuf) {
429 server->bigbuf = (char *)cifs_buf_get();
430 if (!server->bigbuf) {
3d9c2472
PS		 431 cERROR(1, "No memory for large SMB response");
432 msleep(3000);
433 /* retry will check if exiting */
434 return false;
435 }
2a37ef94 436 } else if (server->large_buf) {
3d9c2472 437 /* we are reusing a dirty large buf, clear its start */
1887f601 438 memset(server->bigbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 439 }
440
2a37ef94
JL		 441 if (!server->smallbuf) {
442 server->smallbuf = (char *)cifs_small_buf_get();
443 if (!server->smallbuf) {
3d9c2472
PS		 444 cERROR(1, "No memory for SMB response");
445 msleep(1000);
446 /* retry will check if exiting */
447 return false;
448 }
449 /* beginning of smb buffer is cleared in our buf_get */
450 } else {
451 /* if existing small buf clear beginning */
1887f601 452 memset(server->smallbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 453 }
454
3d9c2472
PS		 455 return true;
456}
457
ba749e6d
JL		 458static bool
459server_unresponsive(struct TCP_Server_Info *server)
460{
6dae51a5
PS		 461 /*
462 * We need to wait 2 echo intervals to make sure we handle such
463 * situations right:
464 * 1s client sends a normal SMB request
465 * 2s client gets a response
466 * 30s echo workqueue job pops, and decides we got a response recently
467 * and don't need to send another
468 * ...
469 * 65s kernel_recvmsg times out, and we see that we haven't gotten
470 * a response in >60s.
471 */
472 if (server->tcpStatus == CifsGood &&
473 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
ba749e6d
JL		 474 cERROR(1, "Server %s has not responded in %d seconds. "
475 "Reconnecting...", server->hostname,
6dae51a5 476 (2 * SMB_ECHO_INTERVAL) / HZ);
ba749e6d
JL		 477 cifs_reconnect(server);
478 wake_up(&server->response_q);
479 return true;
480 }
481
482 return false;
483}
484
42c4dfc2
JL		 485/*
486 * kvec_array_init - clone a kvec array, and advance into it
487 * @new: pointer to memory for cloned array
488 * @iov: pointer to original array
489 * @nr_segs: number of members in original array
490 * @bytes: number of bytes to advance into the cloned array
491 *
492 * This function will copy the array provided in iov to a section of memory
493 * and advance the specified number of bytes into the new array. It returns
494 * the number of segments in the new array. "new" must be at least as big as
495 * the original iov array.
496 */
497static unsigned int
498kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
499 size_t bytes)
500{
501 size_t base = 0;
502
503 while (bytes || !iov->iov_len) {
504 int copy = min(bytes, iov->iov_len);
505
506 bytes -= copy;
507 base += copy;
508 if (iov->iov_len == base) {
509 iov++;
510 nr_segs--;
511 base = 0;
512 }
513 }
514 memcpy(new, iov, sizeof(*iov) * nr_segs);
515 new->iov_base += base;
516 new->iov_len -= base;
517 return nr_segs;
518}
519
1041e3f9
JL		 520static struct kvec *
521get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
e7015fb1 522{
1041e3f9
JL		 523 struct kvec *new_iov;
524
525 if (server->iov && nr_segs <= server->nr_iov)
526 return server->iov;
527
528 /* not big enough -- allocate a new one and release the old */
529 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
530 if (new_iov) {
531 kfree(server->iov);
532 server->iov = new_iov;
533 server->nr_iov = nr_segs;
534 }
535 return new_iov;
536}
537
e28bc5b1
JL		 538int
539cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
540 unsigned int nr_segs, unsigned int to_read)
e7015fb1 541{
a52c1eb7
JL		 542 int length = 0;
543 int total_read;
42c4dfc2 544 unsigned int segs;
e831e6cf 545 struct msghdr smb_msg;
42c4dfc2
JL		 546 struct kvec *iov;
547
1041e3f9 548 iov = get_server_iovec(server, nr_segs);
42c4dfc2
JL		 549 if (!iov)
550 return -ENOMEM;
e7015fb1 551
e831e6cf
JL		 552 smb_msg.msg_control = NULL;
553 smb_msg.msg_controllen = 0;
554
a52c1eb7 555 for (total_read = 0; to_read; total_read += length, to_read -= length) {
95edcff4
JL		 556 try_to_freeze();
557
ba749e6d 558 if (server_unresponsive(server)) {
a52c1eb7 559 total_read = -EAGAIN;
ba749e6d
JL		 560 break;
561 }
562
42c4dfc2
JL		 563 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
564
565 length = kernel_recvmsg(server->ssocket, &smb_msg,
566 iov, segs, to_read, 0);
e7015fb1 567
e7015fb1 568 if (server->tcpStatus == CifsExiting) {
a52c1eb7 569 total_read = -ESHUTDOWN;
e7015fb1
PS		 570 break;
571 } else if (server->tcpStatus == CifsNeedReconnect) {
572 cifs_reconnect(server);
a52c1eb7 573 total_read = -EAGAIN;
e7015fb1
PS		 574 break;
575 } else if (length == -ERESTARTSYS ||
576 length == -EAGAIN ||
577 length == -EINTR) {
578 /*
579 * Minimum sleep to prevent looping, allowing socket
580 * to clear and app threads to set tcpStatus
581 * CifsNeedReconnect if server hung.
582 */
583 usleep_range(1000, 2000);
584 length = 0;
a52c1eb7 585 continue;
e7015fb1 586 } else if (length <= 0) {
a52c1eb7
JL		 587 cFYI(1, "Received no data or error: expecting %d "
588 "got %d", to_read, length);
e7015fb1 589 cifs_reconnect(server);
a52c1eb7 590 total_read = -EAGAIN;
e7015fb1
PS		 591 break;
592 }
593 }
a52c1eb7 594 return total_read;
e7015fb1 595}
e7015fb1 596
e28bc5b1
JL		 597int
598cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
599 unsigned int to_read)
42c4dfc2
JL		 600{
601 struct kvec iov;
602
603 iov.iov_base = buf;
604 iov.iov_len = to_read;
605
e28bc5b1 606 return cifs_readv_from_socket(server, &iov, 1, to_read);
e7015fb1
PS		 607}
608
98bac62c 609static bool
fe11e4cc 610is_smb_response(struct TCP_Server_Info *server, unsigned char type)
98bac62c 611{
98bac62c
PS		 612 /*
613 * The first byte big endian of the length field,
614 * is actually not part of the length but the type
615 * with the most common, zero, as regular data.
616 */
fe11e4cc
JL		 617 switch (type) {
618 case RFC1002_SESSION_MESSAGE:
619 /* Regular SMB response */
620 return true;
621 case RFC1002_SESSION_KEEP_ALIVE:
622 cFYI(1, "RFC 1002 session keep alive");
623 break;
624 case RFC1002_POSITIVE_SESSION_RESPONSE:
625 cFYI(1, "RFC 1002 positive session response");
626 break;
627 case RFC1002_NEGATIVE_SESSION_RESPONSE:
98bac62c
PS		 628 /*
629 * We get this from Windows 98 instead of an error on
630 * SMB negprot response.
631 */
fe11e4cc 632 cFYI(1, "RFC 1002 negative session response");
98bac62c
PS		 633 /* give server a second to clean up */
634 msleep(1000);
635 /*
636 * Always try 445 first on reconnect since we get NACK
637 * on some if we ever connected to port 139 (the NACK
638 * is since we do not begin with RFC1001 session
639 * initialize frame).
640 */
fe11e4cc 641 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
98bac62c
PS		 642 cifs_reconnect(server);
643 wake_up(&server->response_q);
fe11e4cc
JL		 644 break;
645 default:
646 cERROR(1, "RFC 1002 unknown response type 0x%x", type);
98bac62c 647 cifs_reconnect(server);
98bac62c
PS		 648 }
649
fe11e4cc 650 return false;
98bac62c
PS		 651}
652
e28bc5b1
JL		 653void
654dequeue_mid(struct mid_q_entry *mid, bool malformed)
ea1f4502 655{
ad69bae1 656#ifdef CONFIG_CIFS_STATS2
ea1f4502 657 mid->when_received = jiffies;
ad69bae1 658#endif
ea1f4502
JL		 659 spin_lock(&GlobalMid_Lock);
660 if (!malformed)
7c9421e1 661 mid->mid_state = MID_RESPONSE_RECEIVED;
ea1f4502 662 else
7c9421e1 663 mid->mid_state = MID_RESPONSE_MALFORMED;
ea1f4502 664 list_del_init(&mid->qhead);
ad69bae1 665 spin_unlock(&GlobalMid_Lock);
ea1f4502 666}
ad69bae1 667
c8054ebd
JL		 668static void
669handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
d4e4854f 670 char *buf, int malformed)
ea1f4502 671{
316cf94a
PS		 672 if (server->ops->check_trans2 &&
673 server->ops->check_trans2(mid, server, buf, malformed))
c8054ebd 674 return;
ea1f4502 675 mid->resp_buf = buf;
7c9421e1 676 mid->large_buf = server->large_buf;
2a37ef94
JL		 677 /* Was previous buf put in mpx struct for multi-rsp? */
678 if (!mid->multiRsp) {
679 /* smb buffer will be freed by user thread */
680 if (server->large_buf)
681 server->bigbuf = NULL;
682 else
683 server->smallbuf = NULL;
684 }
ffc00e27 685 dequeue_mid(mid, malformed);
ad69bae1
PS		 686}
687
762dfd10
PS		 688static void clean_demultiplex_info(struct TCP_Server_Info *server)
689{
690 int length;
691
692 /* take it off the list, if it's not already */
693 spin_lock(&cifs_tcp_ses_lock);
694 list_del_init(&server->tcp_ses_list);
695 spin_unlock(&cifs_tcp_ses_lock);
696
697 spin_lock(&GlobalMid_Lock);
698 server->tcpStatus = CifsExiting;
699 spin_unlock(&GlobalMid_Lock);
700 wake_up_all(&server->response_q);
701
2d86dbc9 702 /* check if we have blocked requests that need to free */
fc40f9cf 703 spin_lock(&server->req_lock);
2d86dbc9
PS		 704 if (server->credits <= 0)
705 server->credits = 1;
fc40f9cf 706 spin_unlock(&server->req_lock);
762dfd10
PS		 707 /*
708 * Although there should not be any requests blocked on this queue it
709 * can not hurt to be paranoid and try to wake up requests that may
710 * haven been blocked when more than 50 at time were on the wire to the
711 * same server - they now will see the session is in exit state and get
712 * out of SendReceive.
713 */
714 wake_up_all(&server->request_q);
715 /* give those requests time to exit */
716 msleep(125);
717
718 if (server->ssocket) {
719 sock_release(server->ssocket);
720 server->ssocket = NULL;
721 }
722
723 if (!list_empty(&server->pending_mid_q)) {
724 struct list_head dispose_list;
725 struct mid_q_entry *mid_entry;
726 struct list_head *tmp, *tmp2;
727
728 INIT_LIST_HEAD(&dispose_list);
729 spin_lock(&GlobalMid_Lock);
730 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
731 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1
PS		 732 cFYI(1, "Clearing mid 0x%llx", mid_entry->mid);
733 mid_entry->mid_state = MID_SHUTDOWN;
762dfd10
PS		 734 list_move(&mid_entry->qhead, &dispose_list);
735 }
736 spin_unlock(&GlobalMid_Lock);
737
738 /* now walk dispose list and issue callbacks */
739 list_for_each_safe(tmp, tmp2, &dispose_list) {
740 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1 741 cFYI(1, "Callback mid 0x%llx", mid_entry->mid);
762dfd10
PS		 742 list_del_init(&mid_entry->qhead);
743 mid_entry->callback(mid_entry);
744 }
745 /* 1/8th of sec is more than enough time for them to exit */
746 msleep(125);
747 }
748
749 if (!list_empty(&server->pending_mid_q)) {
750 /*
751 * mpx threads have not exited yet give them at least the smb
752 * send timeout time for long ops.
753 *
754 * Due to delays on oplock break requests, we need to wait at
755 * least 45 seconds before giving up on a request getting a
756 * response and going ahead and killing cifsd.
757 */
758 cFYI(1, "Wait for exit from demultiplex thread");
759 msleep(46000);
760 /*
761 * If threads still have not exited they are probably never
762 * coming home not much else we can do but free the memory.
763 */
764 }
765
766 kfree(server->hostname);
1041e3f9 767 kfree(server->iov);
762dfd10
PS		 768 kfree(server);
769
770 length = atomic_dec_return(&tcpSesAllocCount);
771 if (length > 0)
772 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
773 GFP_KERNEL);
774}
775
e9097ab4
JL		 776static int
777standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
778{
779 int length;
780 char *buf = server->smallbuf;
d4e4854f 781 unsigned int pdu_length = get_rfc1002_length(buf);
e9097ab4
JL		 782
783 /* make sure this will fit in a large buffer */
1887f601 784 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
e9097ab4
JL		 785 cERROR(1, "SMB response too long (%u bytes)",
786 pdu_length);
787 cifs_reconnect(server);
788 wake_up(&server->response_q);
789 return -EAGAIN;
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;
1da177e4
LT		 840 struct task_struct *task_to_wake = NULL;
841 struct mid_q_entry *mid_entry;
1da177e4 842
1da177e4 843 current->flags |= PF_MEMALLOC;
b6b38f70 844 cFYI(1, "Demultiplex PID: %d", 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
fe11e4cc
JL		 874 cFYI(1, "RFC1002 header 0x%x", pdu_length);
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) {
89482a56
JL		 880 cERROR(1, "SMB response too short (%u bytes)",
881 pdu_length);
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)) {
b6b38f70 913 cERROR(1, "No task to wake, unknown frame received! "
8097531a 914 "NumMids %d", 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
b1c8d2b4 931 task_to_wake = xchg(&server->tsk, NULL);
762dfd10 932 clean_demultiplex_info(server);
50c2f753 933
b1c8d2b4
JL		 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
989
990static int cifs_parse_security_flavors(char *value,
991 struct smb_vol *vol)
992{
993
994 substring_t args[MAX_OPT_ARGS];
995
996 switch (match_token(value, cifs_secflavor_tokens, args)) {
997 case Opt_sec_krb5:
998 vol->secFlg |= CIFSSEC_MAY_KRB5;
999 break;
1000 case Opt_sec_krb5i:
1001 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN;
1002 break;
1003 case Opt_sec_krb5p:
1004 /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */
1005 cERROR(1, "Krb5 cifs privacy not supported");
1006 break;
1007 case Opt_sec_ntlmssp:
1008 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
1009 break;
1010 case Opt_sec_ntlmsspi:
1011 vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN;
1012 break;
1013 case Opt_ntlm:
1014 /* ntlm is default so can be turned off too */
1015 vol->secFlg |= CIFSSEC_MAY_NTLM;
1016 break;
1017 case Opt_sec_ntlmi:
1018 vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN;
1019 break;
7659624f 1020 case Opt_sec_ntlmv2:
8830d7e0
SP		 1021 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1022 break;
1023 case Opt_sec_ntlmv2i:
1024 vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN;
1025 break;
1026#ifdef CONFIG_CIFS_WEAK_PW_HASH
1027 case Opt_sec_lanman:
1028 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1029 break;
1030#endif
1031 case Opt_sec_none:
1032 vol->nullauth = 1;
1033 break;
1034 default:
1035 cERROR(1, "bad security option: %s", value);
1036 return 1;
1037 }
1038
1039 return 0;
1040}
1041
15b6a473
JL		 1042static int
1043cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1044{
1045 substring_t args[MAX_OPT_ARGS];
1046
1047 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1048 case Opt_cache_loose:
1049 vol->direct_io = false;
1050 vol->strict_io = false;
1051 break;
1052 case Opt_cache_strict:
1053 vol->direct_io = false;
1054 vol->strict_io = true;
1055 break;
1056 case Opt_cache_none:
1057 vol->direct_io = true;
1058 vol->strict_io = false;
1059 break;
1060 default:
1061 cERROR(1, "bad cache= option: %s", value);
1062 return 1;
1063 }
1064 return 0;
1065}
1066
23db65f5
JL		 1067static int
1068cifs_parse_smb_version(char *value, struct smb_vol *vol)
1069{
1070 substring_t args[MAX_OPT_ARGS];
1071
1072 switch (match_token(value, cifs_smb_version_tokens, args)) {
1073 case Smb_1:
1074 vol->ops = &smb1_operations;
1075 vol->vals = &smb1_values;
1076 break;
1080ef75
SF		 1077#ifdef CONFIG_CIFS_SMB2
1078 case Smb_21:
1079 vol->ops = &smb21_operations;
1080 vol->vals = &smb21_values;
1081 break;
1082#endif
23db65f5
JL		 1083 default:
1084 cERROR(1, "Unknown vers= option specified: %s", value);
1085 return 1;
1086 }
1087 return 0;
1088}
1089
1da177e4 1090static int
b946845a 1091cifs_parse_mount_options(const char *mountdata, const char *devname,
50c2f753 1092 struct smb_vol *vol)
1da177e4 1093{
8830d7e0 1094 char *data, *end;
957df453 1095 char *mountdata_copy = NULL, *options;
1da177e4
LT		 1096 unsigned int temp_len, i, j;
1097 char separator[2];
9b9d6b24
JL		 1098 short int override_uid = -1;
1099 short int override_gid = -1;
1100 bool uid_specified = false;
1101 bool gid_specified = false;
d8162558
JL		 1102 bool sloppy = false;
1103 char *invalid = NULL;
88463999 1104 char *nodename = utsname()->nodename;
8830d7e0
SP		 1105 char *string = NULL;
1106 char *tmp_end, *value;
1107 char delim;
296838b1
JL		 1108 bool cache_specified = false;
1109 static bool cache_warned = false;
1da177e4
LT		 1110
1111 separator[0] = ',';
50c2f753 1112 separator[1] = 0;
8830d7e0 1113 delim = separator[0];
1da177e4 1114
88463999
JL		 1115 /*
1116 * does not have to be perfect mapping since field is
1117 * informational, only used for servers that do not support
1118 * port 445 and it can be overridden at mount time
1119 */
1397f2ee
JL		 1120 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1121 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
88463999
JL		 1122 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1123
1397f2ee 1124 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
a10faeb2
SF		 1125 /* null target name indicates to use *SMBSERVR default called name
1126 if we end up sending RFC1001 session initialize */
1127 vol->target_rfc1001_name[0] = 0;
3e4b3e1f
JL		 1128 vol->cred_uid = current_uid();
1129 vol->linux_uid = current_uid();
a001e5b5 1130 vol->linux_gid = current_gid();
f55ed1a8
JL		 1131
1132 /* default to only allowing write access to owner of the mount */
1133 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1da177e4
LT		 1134
1135 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
ac67055e
JA		 1136 /* default is always to request posix paths. */
1137 vol->posix_paths = 1;
a0c9217f
JL		 1138 /* default to using server inode numbers where available */
1139 vol->server_ino = 1;
ac67055e 1140
6d20e840
SJ		 1141 vol->actimeo = CIFS_DEF_ACTIMEO;
1142
23db65f5
JL		 1143 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1144 vol->ops = &smb1_operations;
1145 vol->vals = &smb1_values;
1146
b946845a
SF		 1147 if (!mountdata)
1148 goto cifs_parse_mount_err;
1149
1150 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1151 if (!mountdata_copy)
1152 goto cifs_parse_mount_err;
1da177e4 1153
b946845a 1154 options = mountdata_copy;
4906e50b 1155 end = options + strlen(options);
8830d7e0 1156
50c2f753 1157 if (strncmp(options, "sep=", 4) == 0) {
fb8c4b14 1158 if (options[4] != 0) {
1da177e4
LT		 1159 separator[0] = options[4];
1160 options += 5;
1161 } else {
b6b38f70 1162 cFYI(1, "Null separator not allowed");
1da177e4
LT		 1163 }
1164 }
3d3ea8e6
SP		 1165 vol->backupuid_specified = false; /* no backup intent for a user */
1166 vol->backupgid_specified = false; /* no backup intent for a group */
50c2f753 1167
1da177e4 1168 while ((data = strsep(&options, separator)) != NULL) {
8830d7e0
SP		 1169 substring_t args[MAX_OPT_ARGS];
1170 unsigned long option;
1171 int token;
1172
1da177e4
LT		 1173 if (!*data)
1174 continue;
1da177e4 1175
8830d7e0
SP		 1176 token = match_token(data, cifs_mount_option_tokens, args);
1177
1178 switch (token) {
1179
1180 /* Ingnore the following */
1181 case Opt_ignore:
1182 break;
1183
1184 /* Boolean values */
1185 case Opt_user_xattr:
1da177e4 1186 vol->no_xattr = 0;
8830d7e0
SP		 1187 break;
1188 case Opt_nouser_xattr:
1da177e4 1189 vol->no_xattr = 1;
8830d7e0
SP		 1190 break;
1191 case Opt_forceuid:
9b9d6b24 1192 override_uid = 1;
8830d7e0
SP		 1193 break;
1194 case Opt_noforceuid:
9b9d6b24 1195 override_uid = 0;
8830d7e0
SP		 1196 break;
1197 case Opt_noblocksend:
edf1ae40 1198 vol->noblocksnd = 1;
8830d7e0
SP		 1199 break;
1200 case Opt_noautotune:
edf1ae40 1201 vol->noautotune = 1;
8830d7e0
SP		 1202 break;
1203 case Opt_hard:
1da177e4 1204 vol->retry = 1;
8830d7e0
SP		 1205 break;
1206 case Opt_soft:
1da177e4 1207 vol->retry = 0;
8830d7e0
SP		 1208 break;
1209 case Opt_perm:
1da177e4 1210 vol->noperm = 0;
8830d7e0
SP		 1211 break;
1212 case Opt_noperm:
1da177e4 1213 vol->noperm = 1;
8830d7e0
SP		 1214 break;
1215 case Opt_mapchars:
6a0b4824 1216 vol->remap = 1;
8830d7e0
SP		 1217 break;
1218 case Opt_nomapchars:
6a0b4824 1219 vol->remap = 0;
8830d7e0
SP		 1220 break;
1221 case Opt_sfu:
50c2f753 1222 vol->sfu_emul = 1;
8830d7e0
SP		 1223 break;
1224 case Opt_nosfu:
50c2f753 1225 vol->sfu_emul = 0;
8830d7e0
SP		 1226 break;
1227 case Opt_nodfs:
2c1b8615 1228 vol->nodfs = 1;
8830d7e0
SP		 1229 break;
1230 case Opt_posixpaths:
ac67055e 1231 vol->posix_paths = 1;
8830d7e0
SP		 1232 break;
1233 case Opt_noposixpaths:
ac67055e 1234 vol->posix_paths = 0;
8830d7e0
SP		 1235 break;
1236 case Opt_nounix:
c18c842b 1237 vol->no_linux_ext = 1;
8830d7e0
SP		 1238 break;
1239 case Opt_nocase:
50c2f753 1240 vol->nocase = 1;
8830d7e0
SP		 1241 break;
1242 case Opt_brl:
c46fa8ac 1243 vol->nobrl = 0;
8830d7e0
SP		 1244 break;
1245 case Opt_nobrl:
c46fa8ac 1246 vol->nobrl = 1;
5cfdddcf
PS		 1247 /*
1248 * turn off mandatory locking in mode
8830d7e0 1249 * if remote locking is turned off since the
5cfdddcf
PS		 1250 * local vfs will do advisory
1251 */
50c2f753
SF		 1252 if (vol->file_mode ==
1253 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
d3485d37 1254 vol->file_mode = S_IALLUGO;
8830d7e0
SP		 1255 break;
1256 case Opt_forcemandatorylock:
13a6e42a 1257 vol->mand_lock = 1;
8830d7e0
SP		 1258 break;
1259 case Opt_setuids:
1da177e4 1260 vol->setuids = 1;
8830d7e0
SP		 1261 break;
1262 case Opt_nosetuids:
1da177e4 1263 vol->setuids = 0;
8830d7e0
SP		 1264 break;
1265 case Opt_dynperm:
d0a9c078 1266 vol->dynperm = true;
8830d7e0
SP		 1267 break;
1268 case Opt_nodynperm:
d0a9c078 1269 vol->dynperm = false;
8830d7e0
SP		 1270 break;
1271 case Opt_nohard:
1da177e4 1272 vol->retry = 0;
8830d7e0
SP		 1273 break;
1274 case Opt_nosoft:
1da177e4 1275 vol->retry = 1;
8830d7e0
SP		 1276 break;
1277 case Opt_nointr:
1da177e4 1278 vol->intr = 0;
8830d7e0
SP		 1279 break;
1280 case Opt_intr:
1da177e4 1281 vol->intr = 1;
8830d7e0
SP		 1282 break;
1283 case Opt_nostrictsync:
be652445 1284 vol->nostrictsync = 1;
8830d7e0
SP		 1285 break;
1286 case Opt_strictsync:
be652445 1287 vol->nostrictsync = 0;
8830d7e0
SP		 1288 break;
1289 case Opt_serverino:
1da177e4 1290 vol->server_ino = 1;
8830d7e0
SP		 1291 break;
1292 case Opt_noserverino:
1da177e4 1293 vol->server_ino = 0;
8830d7e0
SP		 1294 break;
1295 case Opt_rwpidforward:
d4ffff1f 1296 vol->rwpidforward = 1;
8830d7e0
SP		 1297 break;
1298 case Opt_cifsacl:
0a4b92c0 1299 vol->cifs_acl = 1;
8830d7e0
SP		 1300 break;
1301 case Opt_nocifsacl:
0a4b92c0 1302 vol->cifs_acl = 0;
8830d7e0
SP		 1303 break;
1304 case Opt_acl:
1da177e4 1305 vol->no_psx_acl = 0;
8830d7e0
SP		 1306 break;
1307 case Opt_noacl:
1da177e4 1308 vol->no_psx_acl = 1;
8830d7e0
SP		 1309 break;
1310 case Opt_locallease:
84210e91 1311 vol->local_lease = 1;
8830d7e0
SP		 1312 break;
1313 case Opt_sign:
750d1151 1314 vol->secFlg |= CIFSSEC_MUST_SIGN;
8830d7e0
SP		 1315 break;
1316 case Opt_seal:
95b1cb90 1317 /* we do not do the following in secFlags because seal
8830d7e0
SP		 1318 * is a per tree connection (mount) not a per socket
1319 * or per-smb connection option in the protocol
1320 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1321 */
95b1cb90 1322 vol->seal = 1;
8830d7e0
SP		 1323 break;
1324 case Opt_direct:
296838b1 1325 cache_specified = true;
15b6a473
JL		 1326 vol->direct_io = true;
1327 vol->strict_io = false;
09983b2f
JL		 1328 cERROR(1, "The \"directio\" option will be removed in "
1329 "3.7. Please switch to the \"cache=none\" "
1330 "option.");
8830d7e0
SP		 1331 break;
1332 case Opt_strictcache:
296838b1 1333 cache_specified = true;
15b6a473
JL		 1334 vol->direct_io = false;
1335 vol->strict_io = true;
09983b2f
JL		 1336 cERROR(1, "The \"strictcache\" option will be removed "
1337 "in 3.7. Please switch to the \"cache=strict\" "
1338 "option.");
8830d7e0
SP		 1339 break;
1340 case Opt_noac:
50c2f753
SF		 1341 printk(KERN_WARNING "CIFS: Mount option noac not "
1342 "supported. Instead set "
1343 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
8830d7e0
SP		 1344 break;
1345 case Opt_fsc:
607a569d 1346#ifndef CONFIG_CIFS_FSCACHE
83fb086e 1347 cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE "
607a569d 1348 "kernel config option set");
b946845a 1349 goto cifs_parse_mount_err;
607a569d 1350#endif
fa1df75d 1351 vol->fsc = true;
8830d7e0
SP		 1352 break;
1353 case Opt_mfsymlinks:
736a3320 1354 vol->mfsymlinks = true;
8830d7e0
SP		 1355 break;
1356 case Opt_multiuser:
0eb8a132 1357 vol->multiuser = true;
8830d7e0 1358 break;
d8162558
JL		 1359 case Opt_sloppy:
1360 sloppy = true;
1361 break;
8830d7e0
SP		 1362
1363 /* Numeric Values */
1364 case Opt_backupuid:
1365 if (get_option_ul(args, &option)) {
3d3ea8e6
SP		 1366 cERROR(1, "%s: Invalid backupuid value",
1367 __func__);
1368 goto cifs_parse_mount_err;
1369 }
8830d7e0 1370 vol->backupuid = option;
3d3ea8e6 1371 vol->backupuid_specified = true;
8830d7e0
SP		 1372 break;
1373 case Opt_backupgid:
1374 if (get_option_ul(args, &option)) {
3d3ea8e6
SP		 1375 cERROR(1, "%s: Invalid backupgid value",
1376 __func__);
1377 goto cifs_parse_mount_err;
1378 }
8830d7e0 1379 vol->backupgid = option;
3d3ea8e6 1380 vol->backupgid_specified = true;
8830d7e0
SP		 1381 break;
1382 case Opt_uid:
1383 if (get_option_ul(args, &option)) {
1384 cERROR(1, "%s: Invalid uid value",
1385 __func__);
1386 goto cifs_parse_mount_err;
1387 }
1388 vol->linux_uid = option;
1389 uid_specified = true;
1390 break;
1391 case Opt_cruid:
1392 if (get_option_ul(args, &option)) {
1393 cERROR(1, "%s: Invalid cruid value",
1394 __func__);
1395 goto cifs_parse_mount_err;
1396 }
1397 vol->cred_uid = option;
1398 break;
1399 case Opt_gid:
1400 if (get_option_ul(args, &option)) {
1401 cERROR(1, "%s: Invalid gid value",
1402 __func__);
1403 goto cifs_parse_mount_err;
1404 }
1405 vol->linux_gid = option;
1406 gid_specified = true;
1407 break;
1408 case Opt_file_mode:
1409 if (get_option_ul(args, &option)) {
1410 cERROR(1, "%s: Invalid file_mode value",
1411 __func__);
1412 goto cifs_parse_mount_err;
1413 }
1414 vol->file_mode = option;
1415 break;
1416 case Opt_dirmode:
1417 if (get_option_ul(args, &option)) {
1418 cERROR(1, "%s: Invalid dir_mode value",
1419 __func__);
1420 goto cifs_parse_mount_err;
1421 }
1422 vol->dir_mode = option;
1423 break;
1424 case Opt_port:
1425 if (get_option_ul(args, &option)) {
1426 cERROR(1, "%s: Invalid port value",
1427 __func__);
1428 goto cifs_parse_mount_err;
1429 }
1430 vol->port = option;
1431 break;
1432 case Opt_rsize:
1433 if (get_option_ul(args, &option)) {
1434 cERROR(1, "%s: Invalid rsize value",
1435 __func__);
b946845a 1436 goto cifs_parse_mount_err;
8830d7e0
SP		 1437 }
1438 vol->rsize = option;
1439 break;
1440 case Opt_wsize:
1441 if (get_option_ul(args, &option)) {
1442 cERROR(1, "%s: Invalid wsize value",
1443 __func__);
1444 goto cifs_parse_mount_err;
1445 }
1446 vol->wsize = option;
1447 break;
1448 case Opt_actimeo:
1449 if (get_option_ul(args, &option)) {
1450 cERROR(1, "%s: Invalid actimeo value",
1451 __func__);
1452 goto cifs_parse_mount_err;
1453 }
1454 vol->actimeo = HZ * option;
1455 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
1456 cERROR(1, "CIFS: attribute cache"
1457 "timeout too large");
1458 goto cifs_parse_mount_err;
1459 }
1460 break;
1461
1462 /* String Arguments */
1463
4fe9e963
SP		 1464 case Opt_blank_user:
1465 /* null user, ie. anonymous authentication */
1466 vol->nullauth = 1;
1467 vol->username = NULL;
1468 break;
8830d7e0
SP		 1469 case Opt_user:
1470 string = match_strdup(args);
1471 if (string == NULL)
1472 goto out_nomem;
1473
4fe9e963 1474 if (strnlen(string, MAX_USERNAME_SIZE) >
8830d7e0
SP		 1475 MAX_USERNAME_SIZE) {
1476 printk(KERN_WARNING "CIFS: username too long\n");
1477 goto cifs_parse_mount_err;
1478 }
1479 vol->username = kstrdup(string, GFP_KERNEL);
1480 if (!vol->username) {
1481 printk(KERN_WARNING "CIFS: no memory "
1482 "for username\n");
1483 goto cifs_parse_mount_err;
1484 }
1485 break;
1486 case Opt_blank_pass:
1487 vol->password = NULL;
1488 break;
1489 case Opt_pass:
1490 /* passwords have to be handled differently
1491 * to allow the character used for deliminator
1492 * to be passed within them
1493 */
1494
1495 /* Obtain the value string */
1496 value = strchr(data, '=');
10238074 1497 value++;
8830d7e0
SP		 1498
1499 /* Set tmp_end to end of the string */
1500 tmp_end = (char *) value + strlen(value);
1501
1502 /* Check if following character is the deliminator
1503 * If yes, we have encountered a double deliminator
1504 * reset the NULL character to the deliminator
1505 */
e73f843a 1506 if (tmp_end < end && tmp_end[1] == delim) {
8830d7e0
SP		 1507 tmp_end[0] = delim;
1508
e73f843a
SJ		 1509 /* Keep iterating until we get to a single
1510 * deliminator OR the end
1511 */
1512 while ((tmp_end = strchr(tmp_end, delim))
1513 != NULL && (tmp_end[1] == delim)) {
1514 tmp_end = (char *) &tmp_end[2];
1515 }
1516
1517 /* Reset var options to point to next element */
1518 if (tmp_end) {
1519 tmp_end[0] = '\0';
1520 options = (char *) &tmp_end[1];
1521 } else
1522 /* Reached the end of the mount option
1523 * string */
1524 options = end;
8830d7e0
SP		 1525 }
1526
8830d7e0
SP		 1527 /* Now build new password string */
1528 temp_len = strlen(value);
1529 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1530 if (vol->password == NULL) {
1531 printk(KERN_WARNING "CIFS: no memory "
1532 "for password\n");
1533 goto cifs_parse_mount_err;
1534 }
1535
1536 for (i = 0, j = 0; i < temp_len; i++, j++) {
1537 vol->password[j] = value[i];
1538 if ((value[i] == delim) &&
1539 value[i+1] == delim)
1540 /* skip the second deliminator */
1541 i++;
1542 }
1543 vol->password[j] = '\0';
1544 break;
4fe9e963
SP		 1545 case Opt_blank_ip:
1546 vol->UNCip = NULL;
1547 break;
8830d7e0
SP		 1548 case Opt_ip:
1549 string = match_strdup(args);
1550 if (string == NULL)
1551 goto out_nomem;
1552
4fe9e963 1553 if (strnlen(string, INET6_ADDRSTRLEN) >
8830d7e0
SP		 1554 INET6_ADDRSTRLEN) {
1555 printk(KERN_WARNING "CIFS: ip address "
1556 "too long\n");
1557 goto cifs_parse_mount_err;
1558 }
1559 vol->UNCip = kstrdup(string, GFP_KERNEL);
1560 if (!vol->UNCip) {
1561 printk(KERN_WARNING "CIFS: no memory "
1562 "for UNC IP\n");
1563 goto cifs_parse_mount_err;
1564 }
1565 break;
1566 case Opt_unc:
1567 string = match_strdup(args);
1568 if (string == NULL)
1569 goto out_nomem;
1570
8830d7e0
SP		 1571 temp_len = strnlen(string, 300);
1572 if (temp_len == 300) {
1573 printk(KERN_WARNING "CIFS: UNC name too long\n");
1574 goto cifs_parse_mount_err;
1575 }
1576
e4b41fb9
SP		 1577 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1578 if (vol->UNC == NULL) {
1579 printk(KERN_WARNING "CIFS: no memory for UNC\n");
1580 goto cifs_parse_mount_err;
1581 }
1582 strcpy(vol->UNC, string);
1583
8830d7e0 1584 if (strncmp(string, "//", 2) == 0) {
1da177e4
LT		 1585 vol->UNC[0] = '\\';
1586 vol->UNC[1] = '\\';
8830d7e0 1587 } else if (strncmp(string, "\\\\", 2) != 0) {
50c2f753 1588 printk(KERN_WARNING "CIFS: UNC Path does not "
8830d7e0 1589 "begin with // or \\\\\n");
b946845a 1590 goto cifs_parse_mount_err;
1da177e4 1591 }
8830d7e0 1592
8830d7e0
SP		 1593 break;
1594 case Opt_domain:
1595 string = match_strdup(args);
1596 if (string == NULL)
1597 goto out_nomem;
1598
4fe9e963 1599 if (strnlen(string, 256) == 256) {
8830d7e0
SP		 1600 printk(KERN_WARNING "CIFS: domain name too"
1601 " long\n");
1602 goto cifs_parse_mount_err;
1603 }
1604
1605 vol->domainname = kstrdup(string, GFP_KERNEL);
1606 if (!vol->domainname) {
1607 printk(KERN_WARNING "CIFS: no memory "
1608 "for domainname\n");
1609 goto cifs_parse_mount_err;
1610 }
1611 cFYI(1, "Domain name set");
1612 break;
1613 case Opt_srcaddr:
1614 string = match_strdup(args);
1615 if (string == NULL)
1616 goto out_nomem;
1617
4fe9e963 1618 if (!cifs_convert_address(
8830d7e0
SP		 1619 (struct sockaddr *)&vol->srcaddr,
1620 string, strlen(string))) {
1621 printk(KERN_WARNING "CIFS: Could not parse"
1622 " srcaddr: %s\n", string);
1623 goto cifs_parse_mount_err;
1624 }
1625 break;
1626 case Opt_prefixpath:
1627 string = match_strdup(args);
1628 if (string == NULL)
1629 goto out_nomem;
1630
8830d7e0
SP		 1631 temp_len = strnlen(string, 1024);
1632 if (string[0] != '/')
1633 temp_len++; /* missing leading slash */
1634 if (temp_len > 1024) {
1635 printk(KERN_WARNING "CIFS: prefix too long\n");
1636 goto cifs_parse_mount_err;
1637 }
1638
1639 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1640 if (vol->prepath == NULL) {
1641 printk(KERN_WARNING "CIFS: no memory "
1642 "for path prefix\n");
1643 goto cifs_parse_mount_err;
1644 }
1645
1646 if (string[0] != '/') {
1647 vol->prepath[0] = '/';
1648 strcpy(vol->prepath+1, string);
1649 } else
1650 strcpy(vol->prepath, string);
1651
1652 break;
1653 case Opt_iocharset:
1654 string = match_strdup(args);
1655 if (string == NULL)
1656 goto out_nomem;
1657
4fe9e963 1658 if (strnlen(string, 1024) >= 65) {
8830d7e0
SP		 1659 printk(KERN_WARNING "CIFS: iocharset name "
1660 "too long.\n");
1661 goto cifs_parse_mount_err;
1662 }
1663
1664 if (strnicmp(string, "default", 7) != 0) {
1665 vol->iocharset = kstrdup(string,
1666 GFP_KERNEL);
1667 if (!vol->iocharset) {
1668 printk(KERN_WARNING "CIFS: no memory"
1669 "for charset\n");
1670 goto cifs_parse_mount_err;
1671 }
1672 }
1673 /* if iocharset not set then load_nls_default
1674 * is used by caller
1675 */
1676 cFYI(1, "iocharset set to %s", string);
1677 break;
1678 case Opt_sockopt:
1679 string = match_strdup(args);
1680 if (string == NULL)
1681 goto out_nomem;
1682
67c1f529
JL		 1683 if (strnicmp(string, "TCP_NODELAY", 11) == 0) {
1684 printk(KERN_WARNING "CIFS: the "
1685 "sockopt=TCP_NODELAY option has been "
1686 "deprecated and will be removed "
1687 "in 3.9\n");
8830d7e0 1688 vol->sockopt_tcp_nodelay = 1;
67c1f529 1689 }
8830d7e0
SP		 1690 break;
1691 case Opt_netbiosname:
1692 string = match_strdup(args);
1693 if (string == NULL)
1694 goto out_nomem;
1695
8830d7e0
SP		 1696 memset(vol->source_rfc1001_name, 0x20,
1697 RFC1001_NAME_LEN);
1698 /*
1699 * FIXME: are there cases in which a comma can
1700 * be valid in workstation netbios name (and
1701 * need special handling)?
1702 */
1703 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1704 /* don't ucase netbiosname for user */
1705 if (string[i] == 0)
1706 break;
1707 vol->source_rfc1001_name[i] = string[i];
1708 }
1709 /* The string has 16th byte zero still from
1710 * set at top of the function
1711 */
1712 if (i == RFC1001_NAME_LEN && string[i] != 0)
1713 printk(KERN_WARNING "CIFS: netbiosname"
1714 " longer than 15 truncated.\n");
1715
1716 break;
1717 case Opt_servern:
1718 /* servernetbiosname specified override *SMBSERVER */
1719 string = match_strdup(args);
1720 if (string == NULL)
1721 goto out_nomem;
1722
8830d7e0
SP		 1723 /* last byte, type, is 0x20 for servr type */
1724 memset(vol->target_rfc1001_name, 0x20,
1725 RFC1001_NAME_LEN_WITH_NULL);
1726
1727 /* BB are there cases in which a comma can be
1728 valid in this workstation netbios name
1729 (and need special handling)? */
1730
1731 /* user or mount helper must uppercase the
1732 netbios name */
1733 for (i = 0; i < 15; i++) {
1734 if (string[i] == 0)
1735 break;
1736 vol->target_rfc1001_name[i] = string[i];
1737 }
1738 /* The string has 16th byte zero still from
1739 set at top of the function */
1740 if (i == RFC1001_NAME_LEN && string[i] != 0)
1741 printk(KERN_WARNING "CIFS: server net"
1742 "biosname longer than 15 truncated.\n");
1743 break;
1744 case Opt_ver:
1745 string = match_strdup(args);
1746 if (string == NULL)
1747 goto out_nomem;
1748
5249af32 1749 if (strnicmp(string, "1", 1) == 0) {
8830d7e0
SP		 1750 /* This is the default */
1751 break;
1752 }
1753 /* For all other value, error */
1754 printk(KERN_WARNING "CIFS: Invalid version"
1755 " specified\n");
b946845a 1756 goto cifs_parse_mount_err;
23db65f5
JL		 1757 case Opt_vers:
1758 string = match_strdup(args);
1759 if (string == NULL)
1760 goto out_nomem;
1761
1762 if (cifs_parse_smb_version(string, vol) != 0)
1763 goto cifs_parse_mount_err;
1764 break;
8830d7e0
SP		 1765 case Opt_sec:
1766 string = match_strdup(args);
1767 if (string == NULL)
1768 goto out_nomem;
1769
8830d7e0
SP		 1770 if (cifs_parse_security_flavors(string, vol) != 0)
1771 goto cifs_parse_mount_err;
1772 break;
15b6a473 1773 case Opt_cache:
296838b1 1774 cache_specified = true;
15b6a473
JL		 1775 string = match_strdup(args);
1776 if (string == NULL)
1777 goto out_nomem;
1778
1779 if (cifs_parse_cache_flavor(string, vol) != 0)
1780 goto cifs_parse_mount_err;
1781 break;
8830d7e0 1782 default:
d8162558
JL		 1783 /*
1784 * An option we don't recognize. Save it off for later
1785 * if we haven't already found one
1786 */
1787 if (!invalid)
1788 invalid = data;
8830d7e0 1789 break;
1da177e4 1790 }
8830d7e0
SP		 1791 /* Free up any allocated string */
1792 kfree(string);
1793 string = NULL;
1da177e4 1794 }
0eb8a132 1795
d8162558
JL		 1796 if (!sloppy && invalid) {
1797 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1798 goto cifs_parse_mount_err;
1799 }
1800
8a8798a5
JL		 1801#ifndef CONFIG_KEYS
1802 /* Muliuser mounts require CONFIG_KEYS support */
1803 if (vol->multiuser) {
1804 cERROR(1, "Multiuser mounts require kernels with "
1805 "CONFIG_KEYS enabled.");
b946845a 1806 goto cifs_parse_mount_err;
0eb8a132 1807 }
8a8798a5 1808#endif
0eb8a132 1809
fb8c4b14 1810 if (vol->UNCip == NULL)
1da177e4
LT		 1811 vol->UNCip = &vol->UNC[2];
1812
9b9d6b24
JL		 1813 if (uid_specified)
1814 vol->override_uid = override_uid;
1815 else if (override_uid == 1)
1816 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1817 "specified with no uid= option.\n");
1818
1819 if (gid_specified)
1820 vol->override_gid = override_gid;
1821 else if (override_gid == 1)
1822 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1823 "specified with no gid= option.\n");
1824
296838b1
JL		 1825 /* FIXME: remove this block in 3.7 */
1826 if (!cache_specified && !cache_warned) {
1827 cache_warned = true;
1828 printk(KERN_NOTICE "CIFS: no cache= option specified, using "
1829 "\"cache=loose\". This default will change "
1830 "to \"cache=strict\" in 3.7.\n");
1831 }
1832
b946845a 1833 kfree(mountdata_copy);
1da177e4 1834 return 0;
b946845a 1835
8830d7e0
SP		 1836out_nomem:
1837 printk(KERN_WARNING "Could not allocate temporary buffer\n");
b946845a 1838cifs_parse_mount_err:
8830d7e0 1839 kfree(string);
b946845a
SF		 1840 kfree(mountdata_copy);
1841 return 1;
1da177e4
LT		 1842}
1843
3eb9a889
BG		 1844/** Returns true if srcaddr isn't specified and rhs isn't
1845 * specified, or if srcaddr is specified and
1846 * matches the IP address of the rhs argument.
1847 */
1848static bool
1849srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1850{
1851 switch (srcaddr->sa_family) {
1852 case AF_UNSPEC:
1853 return (rhs->sa_family == AF_UNSPEC);
1854 case AF_INET: {
1855 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1856 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1857 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1858 }
1859 case AF_INET6: {
1860 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
1861 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs;
1862 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1863 }
1864 default:
1865 WARN_ON(1);
1866 return false; /* don't expect to be here */
1867 }
1868}
1869
4b886136
PS		 1870/*
1871 * If no port is specified in addr structure, we try to match with 445 port
1872 * and if it fails - with 139 ports. It should be called only if address
1873 * families of server and addr are equal.
1874 */
1875static bool
1876match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1877{
6da97910 1878 __be16 port, *sport;
4b886136
PS		 1879
1880 switch (addr->sa_family) {
1881 case AF_INET:
1882 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1883 port = ((struct sockaddr_in *) addr)->sin_port;
1884 break;
1885 case AF_INET6:
1886 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1887 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1888 break;
1889 default:
1890 WARN_ON(1);
1891 return false;
1892 }
1893
1894 if (!port) {
1895 port = htons(CIFS_PORT);
1896 if (port == *sport)
1897 return true;
1898
1899 port = htons(RFC1001_PORT);
1900 }
1901
1902 return port == *sport;
1903}
3eb9a889 1904
4515148e 1905static bool
3eb9a889
BG		 1906match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1907 struct sockaddr *srcaddr)
4515148e 1908{
4515148e 1909 switch (addr->sa_family) {
a9f1b85e
PS		 1910 case AF_INET: {
1911 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1912 struct sockaddr_in *srv_addr4 =
1913 (struct sockaddr_in *)&server->dstaddr;
1914
1915 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
4515148e 1916 return false;
4515148e 1917 break;
a9f1b85e
PS		 1918 }
1919 case AF_INET6: {
1920 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1921 struct sockaddr_in6 *srv_addr6 =
1922 (struct sockaddr_in6 *)&server->dstaddr;
1923
4515148e 1924 if (!ipv6_addr_equal(&addr6->sin6_addr,
a9f1b85e 1925 &srv_addr6->sin6_addr))
4515148e 1926 return false;
a9f1b85e 1927 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
4515148e 1928 return false;
4515148e
JL		 1929 break;
1930 }
a9f1b85e
PS		 1931 default:
1932 WARN_ON(1);
1933 return false; /* don't expect to be here */
1934 }
4515148e 1935
3eb9a889
BG		 1936 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1937 return false;
1938
4515148e
JL		 1939 return true;
1940}
1941
daf5b0b6
JL		 1942static bool
1943match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1944{
1945 unsigned int secFlags;
1946
1947 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1948 secFlags = vol->secFlg;
1949 else
1950 secFlags = global_secflags | vol->secFlg;
1951
1952 switch (server->secType) {
1953 case LANMAN:
1954 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1955 return false;
1956 break;
1957 case NTLMv2:
1958 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1959 return false;
1960 break;
1961 case NTLM:
1962 if (!(secFlags & CIFSSEC_MAY_NTLM))
1963 return false;
1964 break;
1965 case Kerberos:
1966 if (!(secFlags & CIFSSEC_MAY_KRB5))
1967 return false;
1968 break;
1969 case RawNTLMSSP:
1970 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
1971 return false;
1972 break;
1973 default:
1974 /* shouldn't happen */
1975 return false;
1976 }
1977
25985edc 1978 /* now check if signing mode is acceptable */
daf5b0b6 1979 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
96daf2b0 1980 (server->sec_mode & SECMODE_SIGN_REQUIRED))
daf5b0b6
JL		 1981 return false;
1982 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
96daf2b0 1983 (server->sec_mode &
daf5b0b6
JL		 1984 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
1985 return false;
1986
1987 return true;
1988}
1989
37bb04e5
PS		 1990static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
1991 struct smb_vol *vol)
1992{
23db65f5
JL		 1993 if ((server->vals != vol->vals) || (server->ops != vol->ops))
1994 return 0;
1995
37bb04e5
PS		 1996 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
1997 return 0;
1998
1999 if (!match_address(server, addr,
2000 (struct sockaddr *)&vol->srcaddr))
2001 return 0;
2002
2003 if (!match_port(server, addr))
2004 return 0;
2005
2006 if (!match_security(server, vol))
2007 return 0;
2008
2009 return 1;
2010}
2011
e7ddee90 2012static struct TCP_Server_Info *
daf5b0b6 2013cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
1da177e4 2014{
e7ddee90 2015 struct TCP_Server_Info *server;
e7ddee90 2016
3f9bcca7 2017 spin_lock(&cifs_tcp_ses_lock);
4515148e 2018 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
37bb04e5 2019 if (!match_server(server, addr, vol))
daf5b0b6
JL		 2020 continue;
2021
e7ddee90 2022 ++server->srv_count;
3f9bcca7 2023 spin_unlock(&cifs_tcp_ses_lock);
b6b38f70 2024 cFYI(1, "Existing tcp session with server found");
e7ddee90 2025 return server;
1da177e4 2026 }
3f9bcca7 2027 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2028 return NULL;
2029}
1b20d672 2030
14fbf50d 2031static void
e7ddee90 2032cifs_put_tcp_session(struct TCP_Server_Info *server)
1da177e4 2033{
e7ddee90 2034 struct task_struct *task;
1b20d672 2035
3f9bcca7 2036 spin_lock(&cifs_tcp_ses_lock);
e7ddee90 2037 if (--server->srv_count > 0) {
3f9bcca7 2038 spin_unlock(&cifs_tcp_ses_lock);
e7ddee90 2039 return;
1da177e4 2040 }
1b20d672 2041
f1d0c998
RL		 2042 put_net(cifs_net_ns(server));
2043
e7ddee90 2044 list_del_init(&server->tcp_ses_list);
3f9bcca7 2045 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2046
c74093b6
JL		 2047 cancel_delayed_work_sync(&server->echo);
2048
e7ddee90
JL		 2049 spin_lock(&GlobalMid_Lock);
2050 server->tcpStatus = CifsExiting;
2051 spin_unlock(&GlobalMid_Lock);
dea570e0 2052
d2b91521 2053 cifs_crypto_shash_release(server);
488f1d2d
SJ		 2054 cifs_fscache_release_client_cookie(server);
2055
21e73393
SP		 2056 kfree(server->session_key.response);
2057 server->session_key.response = NULL;
2058 server->session_key.len = 0;
2059
e7ddee90
JL		 2060 task = xchg(&server->tsk, NULL);
2061 if (task)
2062 force_sig(SIGKILL, task);
1da177e4
LT		 2063}
2064
63c038c2
JL		 2065static struct TCP_Server_Info *
2066cifs_get_tcp_session(struct smb_vol *volume_info)
2067{
2068 struct TCP_Server_Info *tcp_ses = NULL;
a9ac49d3 2069 struct sockaddr_storage addr;
63c038c2
JL		 2070 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
2071 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
2072 int rc;
2073
a9ac49d3 2074 memset(&addr, 0, sizeof(struct sockaddr_storage));
63c038c2 2075
b6b38f70 2076 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
63c038c2 2077
1e68b2b2 2078 if (volume_info->UNCip && volume_info->UNC) {
50d97160
JL		 2079 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
2080 volume_info->UNCip,
67b7626a 2081 strlen(volume_info->UNCip),
50d97160 2082 volume_info->port);
1e68b2b2 2083 if (!rc) {
63c038c2
JL		 2084 /* we failed translating address */
2085 rc = -EINVAL;
2086 goto out_err;
2087 }
63c038c2
JL		 2088 } else if (volume_info->UNCip) {
2089 /* BB using ip addr as tcp_ses name to connect to the
2090 DFS root below */
b6b38f70 2091 cERROR(1, "Connecting to DFS root not implemented yet");
63c038c2
JL		 2092 rc = -EINVAL;
2093 goto out_err;
2094 } else /* which tcp_sess DFS root would we conect to */ {
b6b38f70
JP		 2095 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
2096 "unc=//192.168.1.100/public) specified");
63c038c2
JL		 2097 rc = -EINVAL;
2098 goto out_err;
2099 }
2100
2101 /* see if we already have a matching tcp_ses */
daf5b0b6 2102 tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
63c038c2
JL		 2103 if (tcp_ses)
2104 return tcp_ses;
2105
2106 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2107 if (!tcp_ses) {
2108 rc = -ENOMEM;
2109 goto out_err;
2110 }
2111
d2b91521
SP		 2112 rc = cifs_crypto_shash_allocate(tcp_ses);
2113 if (rc) {
2114 cERROR(1, "could not setup hash structures rc %d", rc);
2115 goto out_err;
2116 }
2117
23db65f5
JL		 2118 tcp_ses->ops = volume_info->ops;
2119 tcp_ses->vals = volume_info->vals;
f1d0c998 2120 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
63c038c2
JL		 2121 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2122 if (IS_ERR(tcp_ses->hostname)) {
2123 rc = PTR_ERR(tcp_ses->hostname);
f7c5445a 2124 goto out_err_crypto_release;
63c038c2
JL		 2125 }
2126
2127 tcp_ses->noblocksnd = volume_info->noblocksnd;
2128 tcp_ses->noautotune = volume_info->noautotune;
6a5fa236 2129 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
fc40f9cf 2130 tcp_ses->in_flight = 0;
2d86dbc9 2131 tcp_ses->credits = 1;
63c038c2
JL		 2132 init_waitqueue_head(&tcp_ses->response_q);
2133 init_waitqueue_head(&tcp_ses->request_q);
2134 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2135 mutex_init(&tcp_ses->srv_mutex);
2136 memcpy(tcp_ses->workstation_RFC1001_name,
2137 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2138 memcpy(tcp_ses->server_RFC1001_name,
2139 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
5d0d2882 2140 tcp_ses->session_estab = false;
63c038c2 2141 tcp_ses->sequence_number = 0;
fda35943 2142 tcp_ses->lstrp = jiffies;
58fa015f 2143 spin_lock_init(&tcp_ses->req_lock);
63c038c2
JL		 2144 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2145 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
c74093b6 2146 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
63c038c2
JL		 2147
2148 /*
2149 * at this point we are the only ones with the pointer
2150 * to the struct since the kernel thread not created yet
2151 * no need to spinlock this init of tcpStatus or srv_count
2152 */
2153 tcp_ses->tcpStatus = CifsNew;
3eb9a889
BG		 2154 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2155 sizeof(tcp_ses->srcaddr));
63c038c2
JL		 2156 ++tcp_ses->srv_count;
2157
a9ac49d3 2158 if (addr.ss_family == AF_INET6) {
b6b38f70 2159 cFYI(1, "attempting ipv6 connect");
63c038c2
JL		 2160 /* BB should we allow ipv6 on port 139? */
2161 /* other OS never observed in Wild doing 139 with v6 */
a9f1b85e
PS		 2162 memcpy(&tcp_ses->dstaddr, sin_server6,
2163 sizeof(struct sockaddr_in6));
2164 } else
2165 memcpy(&tcp_ses->dstaddr, sin_server,
2166 sizeof(struct sockaddr_in));
2167
2168 rc = ip_connect(tcp_ses);
63c038c2 2169 if (rc < 0) {
b6b38f70 2170 cERROR(1, "Error connecting to socket. Aborting operation");
f7c5445a 2171 goto out_err_crypto_release;
63c038c2
JL		 2172 }
2173
2174 /*
2175 * since we're in a cifs function already, we know that
2176 * this will succeed. No need for try_module_get().
2177 */
2178 __module_get(THIS_MODULE);
7c97c200 2179 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
63c038c2
JL		 2180 tcp_ses, "cifsd");
2181 if (IS_ERR(tcp_ses->tsk)) {
2182 rc = PTR_ERR(tcp_ses->tsk);
b6b38f70 2183 cERROR(1, "error %d create cifsd thread", rc);
63c038c2 2184 module_put(THIS_MODULE);
f7c5445a 2185 goto out_err_crypto_release;
63c038c2 2186 }
fd88ce93 2187 tcp_ses->tcpStatus = CifsNeedNegotiate;
63c038c2
JL		 2188
2189 /* thread spawned, put it on the list */
3f9bcca7 2190 spin_lock(&cifs_tcp_ses_lock);
63c038c2 2191 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
3f9bcca7 2192 spin_unlock(&cifs_tcp_ses_lock);
63c038c2 2193
488f1d2d
SJ		 2194 cifs_fscache_get_client_cookie(tcp_ses);
2195
c74093b6 2196 /* queue echo request delayed work */
da472fc8 2197 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
c74093b6 2198
63c038c2
JL		 2199 return tcp_ses;
2200
f7c5445a 2201out_err_crypto_release:
d2b91521
SP		 2202 cifs_crypto_shash_release(tcp_ses);
2203
f1d0c998
RL		 2204 put_net(cifs_net_ns(tcp_ses));
2205
63c038c2
JL		 2206out_err:
2207 if (tcp_ses) {
8347a5cd
SF		 2208 if (!IS_ERR(tcp_ses->hostname))
2209 kfree(tcp_ses->hostname);
63c038c2
JL		 2210 if (tcp_ses->ssocket)
2211 sock_release(tcp_ses->ssocket);
2212 kfree(tcp_ses);
2213 }
2214 return ERR_PTR(rc);
2215}
2216
96daf2b0 2217static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
37bb04e5
PS		 2218{
2219 switch (ses->server->secType) {
2220 case Kerberos:
2221 if (vol->cred_uid != ses->cred_uid)
2222 return 0;
2223 break;
2224 default:
04febabc
JL		 2225 /* NULL username means anonymous session */
2226 if (ses->user_name == NULL) {
2227 if (!vol->nullauth)
2228 return 0;
2229 break;
2230 }
2231
37bb04e5 2232 /* anything else takes username/password */
04febabc
JL		 2233 if (strncmp(ses->user_name,
2234 vol->username ? vol->username : "",
37bb04e5
PS		 2235 MAX_USERNAME_SIZE))
2236 return 0;
2237 if (strlen(vol->username) != 0 &&
2238 ses->password != NULL &&
2239 strncmp(ses->password,
2240 vol->password ? vol->password : "",
2241 MAX_PASSWORD_SIZE))
2242 return 0;
2243 }
2244 return 1;
2245}
2246
96daf2b0 2247static struct cifs_ses *
4ff67b72 2248cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1da177e4 2249{
96daf2b0 2250 struct cifs_ses *ses;
dea570e0 2251
3f9bcca7 2252 spin_lock(&cifs_tcp_ses_lock);
4ff67b72 2253 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
37bb04e5
PS		 2254 if (!match_session(ses, vol))
2255 continue;
14fbf50d 2256 ++ses->ses_count;
3f9bcca7 2257 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2258 return ses;
2259 }
3f9bcca7 2260 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2261 return NULL;
2262}
dea570e0 2263
14fbf50d 2264static void
96daf2b0 2265cifs_put_smb_ses(struct cifs_ses *ses)
14fbf50d 2266{
58c45c58 2267 unsigned int xid;
14fbf50d 2268 struct TCP_Server_Info *server = ses->server;
dea570e0 2269
ac3aa2f8 2270 cFYI(1, "%s: ses_count=%d", __func__, ses->ses_count);
3f9bcca7 2271 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 2272 if (--ses->ses_count > 0) {
3f9bcca7 2273 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2274 return;
2275 }
dea570e0 2276
14fbf50d 2277 list_del_init(&ses->smb_ses_list);
3f9bcca7 2278 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2279
58c45c58 2280 if (ses->status == CifsGood && server->ops->logoff) {
6d5786a3 2281 xid = get_xid();
58c45c58 2282 server->ops->logoff(xid, ses);
6d5786a3 2283 _free_xid(xid);
14fbf50d
JL		 2284 }
2285 sesInfoFree(ses);
2286 cifs_put_tcp_session(server);
2287}
dea570e0 2288
8a8798a5
JL		 2289#ifdef CONFIG_KEYS
2290
2291/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
2292#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
2293
2294/* Populate username and pw fields from keyring if possible */
2295static int
2296cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2297{
2298 int rc = 0;
2299 char *desc, *delim, *payload;
2300 ssize_t len;
2301 struct key *key;
2302 struct TCP_Server_Info *server = ses->server;
2303 struct sockaddr_in *sa;
2304 struct sockaddr_in6 *sa6;
2305 struct user_key_payload *upayload;
2306
2307 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2308 if (!desc)
2309 return -ENOMEM;
2310
2311 /* try to find an address key first */
2312 switch (server->dstaddr.ss_family) {
2313 case AF_INET:
2314 sa = (struct sockaddr_in *)&server->dstaddr;
2315 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2316 break;
2317 case AF_INET6:
2318 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2319 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2320 break;
2321 default:
2322 cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family);
2323 rc = -EINVAL;
2324 goto out_err;
2325 }
2326
2327 cFYI(1, "%s: desc=%s", __func__, desc);
2328 key = request_key(&key_type_logon, desc, "");
2329 if (IS_ERR(key)) {
2330 if (!ses->domainName) {
2331 cFYI(1, "domainName is NULL");
2332 rc = PTR_ERR(key);
2333 goto out_err;
2334 }
2335
2336 /* didn't work, try to find a domain key */
2337 sprintf(desc, "cifs:d:%s", ses->domainName);
2338 cFYI(1, "%s: desc=%s", __func__, desc);
2339 key = request_key(&key_type_logon, desc, "");
2340 if (IS_ERR(key)) {
2341 rc = PTR_ERR(key);
2342 goto out_err;
2343 }
2344 }
2345
2346 down_read(&key->sem);
2347 upayload = key->payload.data;
2348 if (IS_ERR_OR_NULL(upayload)) {
4edc53c1 2349 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
8a8798a5
JL		 2350 goto out_key_put;
2351 }
2352
2353 /* find first : in payload */
2354 payload = (char *)upayload->data;
2355 delim = strnchr(payload, upayload->datalen, ':');
2356 cFYI(1, "payload=%s", payload);
2357 if (!delim) {
2358 cFYI(1, "Unable to find ':' in payload (datalen=%d)",
2359 upayload->datalen);
2360 rc = -EINVAL;
2361 goto out_key_put;
2362 }
2363
2364 len = delim - payload;
2365 if (len > MAX_USERNAME_SIZE || len <= 0) {
000f9bb8 2366 cFYI(1, "Bad value from username search (len=%zd)", len);
8a8798a5
JL		 2367 rc = -EINVAL;
2368 goto out_key_put;
2369 }
2370
2371 vol->username = kstrndup(payload, len, GFP_KERNEL);
2372 if (!vol->username) {
000f9bb8 2373 cFYI(1, "Unable to allocate %zd bytes for username", len);
8a8798a5
JL		 2374 rc = -ENOMEM;
2375 goto out_key_put;
2376 }
2377 cFYI(1, "%s: username=%s", __func__, vol->username);
2378
2379 len = key->datalen - (len + 1);
2380 if (len > MAX_PASSWORD_SIZE || len <= 0) {
000f9bb8 2381 cFYI(1, "Bad len for password search (len=%zd)", len);
8a8798a5
JL		 2382 rc = -EINVAL;
2383 kfree(vol->username);
2384 vol->username = NULL;
2385 goto out_key_put;
2386 }
2387
2388 ++delim;
2389 vol->password = kstrndup(delim, len, GFP_KERNEL);
2390 if (!vol->password) {
000f9bb8 2391 cFYI(1, "Unable to allocate %zd bytes for password", len);
8a8798a5
JL		 2392 rc = -ENOMEM;
2393 kfree(vol->username);
2394 vol->username = NULL;
2395 goto out_key_put;
2396 }
2397
2398out_key_put:
2399 up_read(&key->sem);
2400 key_put(key);
2401out_err:
2402 kfree(desc);
2403 cFYI(1, "%s: returning %d", __func__, rc);
2404 return rc;
2405}
2406#else /* ! CONFIG_KEYS */
2407static inline int
2408cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2409 struct cifs_ses *ses __attribute__((unused)))
2410{
2411 return -ENOSYS;
2412}
2413#endif /* CONFIG_KEYS */
2414
d9b94201
SF		 2415static bool warned_on_ntlm; /* globals init to false automatically */
2416
96daf2b0 2417static struct cifs_ses *
36988c76
JL		 2418cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2419{
286170aa
PS		 2420 int rc = -ENOMEM;
2421 unsigned int xid;
96daf2b0 2422 struct cifs_ses *ses;
a9f1b85e
PS		 2423 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2424 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
36988c76 2425
6d5786a3 2426 xid = get_xid();
36988c76 2427
4ff67b72 2428 ses = cifs_find_smb_ses(server, volume_info);
36988c76
JL		 2429 if (ses) {
2430 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
2431
36988c76 2432 mutex_lock(&ses->session_mutex);
198b5682
JL		 2433 rc = cifs_negotiate_protocol(xid, ses);
2434 if (rc) {
2435 mutex_unlock(&ses->session_mutex);
2436 /* problem -- put our ses reference */
2437 cifs_put_smb_ses(ses);
6d5786a3 2438 free_xid(xid);
198b5682
JL		 2439 return ERR_PTR(rc);
2440 }
36988c76
JL		 2441 if (ses->need_reconnect) {
2442 cFYI(1, "Session needs reconnect");
2443 rc = cifs_setup_session(xid, ses,
2444 volume_info->local_nls);
2445 if (rc) {
2446 mutex_unlock(&ses->session_mutex);
2447 /* problem -- put our reference */
2448 cifs_put_smb_ses(ses);
6d5786a3 2449 free_xid(xid);
36988c76
JL		 2450 return ERR_PTR(rc);
2451 }
2452 }
2453 mutex_unlock(&ses->session_mutex);
460cf341
JL		 2454
2455 /* existing SMB ses has a server reference already */
2456 cifs_put_tcp_session(server);
6d5786a3 2457 free_xid(xid);
36988c76
JL		 2458 return ses;
2459 }
2460
2461 cFYI(1, "Existing smb sess not found");
2462 ses = sesInfoAlloc();
2463 if (ses == NULL)
2464 goto get_ses_fail;
2465
2466 /* new SMB session uses our server ref */
2467 ses->server = server;
a9f1b85e
PS		 2468 if (server->dstaddr.ss_family == AF_INET6)
2469 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
36988c76 2470 else
a9f1b85e 2471 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
36988c76 2472
8727c8a8
SF		 2473 if (volume_info->username) {
2474 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2475 if (!ses->user_name)
2476 goto get_ses_fail;
2477 }
36988c76
JL		 2478
2479 /* volume_info->password freed at unmount */
2480 if (volume_info->password) {
2481 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2482 if (!ses->password)
2483 goto get_ses_fail;
2484 }
2485 if (volume_info->domainname) {
d3686d54
SP		 2486 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2487 if (!ses->domainName)
2488 goto get_ses_fail;
36988c76 2489 }
3e4b3e1f 2490 ses->cred_uid = volume_info->cred_uid;
36988c76 2491 ses->linux_uid = volume_info->linux_uid;
d9b94201
SF		 2492
2493 /* ntlmv2 is much stronger than ntlm security, and has been broadly
2494 supported for many years, time to update default security mechanism */
2495 if ((volume_info->secFlg == 0) && warned_on_ntlm == false) {
2496 warned_on_ntlm = true;
2497 cERROR(1, "default security mechanism requested. The default "
2498 "security mechanism will be upgraded from ntlm to "
225de11e 2499 "ntlmv2 in kernel release 3.3");
d9b94201 2500 }
36988c76
JL		 2501 ses->overrideSecFlg = volume_info->secFlg;
2502
2503 mutex_lock(&ses->session_mutex);
198b5682
JL		 2504 rc = cifs_negotiate_protocol(xid, ses);
2505 if (!rc)
2506 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
36988c76 2507 mutex_unlock(&ses->session_mutex);
c8e56f1f 2508 if (rc)
36988c76
JL		 2509 goto get_ses_fail;
2510
2511 /* success, put it on the list */
3f9bcca7 2512 spin_lock(&cifs_tcp_ses_lock);
36988c76 2513 list_add(&ses->smb_ses_list, &server->smb_ses_list);
3f9bcca7 2514 spin_unlock(&cifs_tcp_ses_lock);
36988c76 2515
6d5786a3 2516 free_xid(xid);
36988c76
JL		 2517 return ses;
2518
2519get_ses_fail:
2520 sesInfoFree(ses);
6d5786a3 2521 free_xid(xid);
36988c76
JL		 2522 return ERR_PTR(rc);
2523}
2524
96daf2b0 2525static int match_tcon(struct cifs_tcon *tcon, const char *unc)
37bb04e5
PS		 2526{
2527 if (tcon->tidStatus == CifsExiting)
2528 return 0;
2529 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2530 return 0;
2531 return 1;
2532}
2533
96daf2b0
SF		 2534static struct cifs_tcon *
2535cifs_find_tcon(struct cifs_ses *ses, const char *unc)
f1987b44
JL		 2536{
2537 struct list_head *tmp;
96daf2b0 2538 struct cifs_tcon *tcon;
f1987b44 2539
3f9bcca7 2540 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2541 list_for_each(tmp, &ses->tcon_list) {
96daf2b0 2542 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
37bb04e5 2543 if (!match_tcon(tcon, unc))
f1987b44 2544 continue;
f1987b44 2545 ++tcon->tc_count;
3f9bcca7 2546 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2547 return tcon;
1da177e4 2548 }
3f9bcca7 2549 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2550 return NULL;
2551}
2552
f1987b44 2553static void
96daf2b0 2554cifs_put_tcon(struct cifs_tcon *tcon)
f1987b44 2555{
2e6e02ab 2556 unsigned int xid;
96daf2b0 2557 struct cifs_ses *ses = tcon->ses;
f1987b44 2558
ac3aa2f8 2559 cFYI(1, "%s: tc_count=%d", __func__, tcon->tc_count);
3f9bcca7 2560 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2561 if (--tcon->tc_count > 0) {
3f9bcca7 2562 spin_unlock(&cifs_tcp_ses_lock);
f1987b44
JL		 2563 return;
2564 }
2565
2566 list_del_init(&tcon->tcon_list);
3f9bcca7 2567 spin_unlock(&cifs_tcp_ses_lock);
f1987b44 2568
6d5786a3 2569 xid = get_xid();
2e6e02ab
PS		 2570 if (ses->server->ops->tree_disconnect)
2571 ses->server->ops->tree_disconnect(xid, tcon);
6d5786a3 2572 _free_xid(xid);
f1987b44 2573
d03382ce 2574 cifs_fscache_release_super_cookie(tcon);
9f841593 2575 tconInfoFree(tcon);
f1987b44
JL		 2576 cifs_put_smb_ses(ses);
2577}
2578
96daf2b0
SF		 2579static struct cifs_tcon *
2580cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
d00c28de
JL		 2581{
2582 int rc, xid;
96daf2b0 2583 struct cifs_tcon *tcon;
d00c28de
JL		 2584
2585 tcon = cifs_find_tcon(ses, volume_info->UNC);
2586 if (tcon) {
2587 cFYI(1, "Found match on UNC path");
2588 /* existing tcon already has a reference */
2589 cifs_put_smb_ses(ses);
2590 if (tcon->seal != volume_info->seal)
2591 cERROR(1, "transport encryption setting "
2592 "conflicts with existing tid");
2593 return tcon;
2594 }
2595
2e6e02ab
PS		 2596 if (!ses->server->ops->tree_connect) {
2597 rc = -ENOSYS;
2598 goto out_fail;
2599 }
2600
d00c28de
JL		 2601 tcon = tconInfoAlloc();
2602 if (tcon == NULL) {
2603 rc = -ENOMEM;
2604 goto out_fail;
2605 }
2606
2607 tcon->ses = ses;
2608 if (volume_info->password) {
2609 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2610 if (!tcon->password) {
2611 rc = -ENOMEM;
2612 goto out_fail;
2613 }
2614 }
2615
2616 if (strchr(volume_info->UNC + 3, '\\') == NULL
2617 && strchr(volume_info->UNC + 3, '/') == NULL) {
2618 cERROR(1, "Missing share name");
2619 rc = -ENODEV;
2620 goto out_fail;
2621 }
2622
2e6e02ab
PS		 2623 /*
2624 * BB Do we need to wrap session_mutex around this TCon call and Unix
2625 * SetFS as we do on SessSetup and reconnect?
2626 */
6d5786a3 2627 xid = get_xid();
2e6e02ab
PS		 2628 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2629 volume_info->local_nls);
6d5786a3 2630 free_xid(xid);
2e6e02ab 2631 cFYI(1, "Tcon rc = %d", rc);
d00c28de
JL		 2632 if (rc)
2633 goto out_fail;
2634
2635 if (volume_info->nodfs) {
2636 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2637 cFYI(1, "DFS disabled (%d)", tcon->Flags);
2638 }
2639 tcon->seal = volume_info->seal;
2e6e02ab
PS		 2640 /*
2641 * We can have only one retry value for a connection to a share so for
2642 * resources mounted more than once to the same server share the last
2643 * value passed in for the retry flag is used.
2644 */
d00c28de
JL		 2645 tcon->retry = volume_info->retry;
2646 tcon->nocase = volume_info->nocase;
2647 tcon->local_lease = volume_info->local_lease;
233839b1 2648 INIT_LIST_HEAD(&tcon->pending_opens);
d00c28de 2649
3f9bcca7 2650 spin_lock(&cifs_tcp_ses_lock);
d00c28de 2651 list_add(&tcon->tcon_list, &ses->tcon_list);
3f9bcca7 2652 spin_unlock(&cifs_tcp_ses_lock);
d00c28de 2653
d03382ce
SJ		 2654 cifs_fscache_get_super_cookie(tcon);
2655
d00c28de
JL		 2656 return tcon;
2657
2658out_fail:
2659 tconInfoFree(tcon);
2660 return ERR_PTR(rc);
2661}
2662
9d002df4
JL		 2663void
2664cifs_put_tlink(struct tcon_link *tlink)
2665{
2666 if (!tlink || IS_ERR(tlink))
2667 return;
2668
2669 if (!atomic_dec_and_test(&tlink->tl_count) ||
2670 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2671 tlink->tl_time = jiffies;
2672 return;
2673 }
2674
2675 if (!IS_ERR(tlink_tcon(tlink)))
2676 cifs_put_tcon(tlink_tcon(tlink));
2677 kfree(tlink);
2678 return;
2679}
d00c28de 2680
25c7f41e 2681static inline struct tcon_link *
cd51875d
PS		 2682cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2683{
2684 return cifs_sb->master_tlink;
2685}
25c7f41e
PS		 2686
2687static int
2688compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2689{
2690 struct cifs_sb_info *old = CIFS_SB(sb);
2691 struct cifs_sb_info *new = mnt_data->cifs_sb;
2692
2693 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2694 return 0;
2695
2696 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2697 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2698 return 0;
2699
25c7f41e 2700 /*
5eba8ab3
JL		 2701 * We want to share sb only if we don't specify an r/wsize or
2702 * specified r/wsize is greater than or equal to existing one.
25c7f41e
PS		 2703 */
2704 if (new->wsize && new->wsize < old->wsize)
2705 return 0;
2706
5eba8ab3
JL		 2707 if (new->rsize && new->rsize < old->rsize)
2708 return 0;
2709
25c7f41e
PS		 2710 if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid)
2711 return 0;
2712
2713 if (old->mnt_file_mode != new->mnt_file_mode ||
2714 old->mnt_dir_mode != new->mnt_dir_mode)
2715 return 0;
2716
2717 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2718 return 0;
2719
2720 if (old->actimeo != new->actimeo)
2721 return 0;
2722
2723 return 1;
2724}
2725
2726int
2727cifs_match_super(struct super_block *sb, void *data)
2728{
2729 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2730 struct smb_vol *volume_info;
2731 struct cifs_sb_info *cifs_sb;
2732 struct TCP_Server_Info *tcp_srv;
96daf2b0
SF		 2733 struct cifs_ses *ses;
2734 struct cifs_tcon *tcon;
25c7f41e
PS		 2735 struct tcon_link *tlink;
2736 struct sockaddr_storage addr;
2737 int rc = 0;
2738
2739 memset(&addr, 0, sizeof(struct sockaddr_storage));
2740
2741 spin_lock(&cifs_tcp_ses_lock);
2742 cifs_sb = CIFS_SB(sb);
2743 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2744 if (IS_ERR(tlink)) {
2745 spin_unlock(&cifs_tcp_ses_lock);
2746 return rc;
2747 }
2748 tcon = tlink_tcon(tlink);
2749 ses = tcon->ses;
2750 tcp_srv = ses->server;
2751
2752 volume_info = mnt_data->vol;
2753
2754 if (!volume_info->UNCip || !volume_info->UNC)
2755 goto out;
2756
2757 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
2758 volume_info->UNCip,
2759 strlen(volume_info->UNCip),
2760 volume_info->port);
2761 if (!rc)
2762 goto out;
2763
2764 if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) ||
2765 !match_session(ses, volume_info) ||
2766 !match_tcon(tcon, volume_info->UNC)) {
2767 rc = 0;
2768 goto out;
2769 }
2770
2771 rc = compare_mount_options(sb, mnt_data);
2772out:
25c7f41e 2773 spin_unlock(&cifs_tcp_ses_lock);
f484b5d0 2774 cifs_put_tlink(tlink);
25c7f41e
PS		 2775 return rc;
2776}
2777
1da177e4 2778int
b669f33c 2779get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2e6e02ab
PS		 2780 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2781 struct dfs_info3_param **referrals, int remap)
1da177e4
LT		 2782{
2783 char *temp_unc;
2784 int rc = 0;
2785
b669f33c 2786 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2e6e02ab
PS		 2787 return -ENOSYS;
2788
2789 *num_referrals = 0;
2790 *referrals = NULL;
1da177e4 2791
2e6e02ab 2792 if (ses->ipc_tid == 0) {
1da177e4 2793 temp_unc = kmalloc(2 /* for slashes */ +
2e6e02ab
PS		 2794 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2795 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
1da177e4
LT		 2796 if (temp_unc == NULL)
2797 return -ENOMEM;
2798 temp_unc[0] = '\\';
2799 temp_unc[1] = '\\';
2e6e02ab
PS		 2800 strcpy(temp_unc + 2, ses->serverName);
2801 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2802 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2803 nls_codepage);
2804 cFYI(1, "Tcon rc = %d ipc_tid = %d", rc, ses->ipc_tid);
1da177e4
LT		 2805 kfree(temp_unc);
2806 }
2807 if (rc == 0)
b669f33c
PS		 2808 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2809 referrals, num_referrals,
2810 nls_codepage, remap);
2e6e02ab
PS		 2811 /*
2812 * BB - map targetUNCs to dfs_info3 structures, here or in
b669f33c 2813 * ses->server->ops->get_dfs_refer.
2e6e02ab 2814 */
1da177e4
LT		 2815
2816 return rc;
2817}
2818
09e50d55
JL		 2819#ifdef CONFIG_DEBUG_LOCK_ALLOC
2820static struct lock_class_key cifs_key[2];
2821static struct lock_class_key cifs_slock_key[2];
2822
2823static inline void
2824cifs_reclassify_socket4(struct socket *sock)
2825{
2826 struct sock *sk = sock->sk;
2827 BUG_ON(sock_owned_by_user(sk));
2828 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2829 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2830}
2831
2832static inline void
2833cifs_reclassify_socket6(struct socket *sock)
2834{
2835 struct sock *sk = sock->sk;
2836 BUG_ON(sock_owned_by_user(sk));
2837 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2838 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2839}
2840#else
2841static inline void
2842cifs_reclassify_socket4(struct socket *sock)
2843{
2844}
2845
2846static inline void
2847cifs_reclassify_socket6(struct socket *sock)
2848{
2849}
2850#endif
2851
1da177e4 2852/* See RFC1001 section 14 on representation of Netbios names */
50c2f753 2853static void rfc1002mangle(char *target, char *source, unsigned int length)
1da177e4 2854{
50c2f753 2855 unsigned int i, j;
1da177e4 2856
50c2f753 2857 for (i = 0, j = 0; i < (length); i++) {
1da177e4
LT		 2858 /* mask a nibble at a time and encode */
2859 target[j] = 'A' + (0x0F & (source[i] >> 4));
2860 target[j+1] = 'A' + (0x0F & source[i]);
50c2f753 2861 j += 2;
1da177e4
LT		 2862 }
2863
2864}
2865
3eb9a889
BG		 2866static int
2867bind_socket(struct TCP_Server_Info *server)
2868{
2869 int rc = 0;
2870 if (server->srcaddr.ss_family != AF_UNSPEC) {
2871 /* Bind to the specified local IP address */
2872 struct socket *socket = server->ssocket;
2873 rc = socket->ops->bind(socket,
2874 (struct sockaddr *) &server->srcaddr,
2875 sizeof(server->srcaddr));
2876 if (rc < 0) {
2877 struct sockaddr_in *saddr4;
2878 struct sockaddr_in6 *saddr6;
2879 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2880 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2881 if (saddr6->sin6_family == AF_INET6)
2882 cERROR(1, "cifs: "
ac3aa2f8 2883 "Failed to bind to: %pI6c, error: %d",
3eb9a889
BG		 2884 &saddr6->sin6_addr, rc);
2885 else
2886 cERROR(1, "cifs: "
ac3aa2f8 2887 "Failed to bind to: %pI4, error: %d",
3eb9a889
BG		 2888 &saddr4->sin_addr.s_addr, rc);
2889 }
2890 }
2891 return rc;
2892}
1da177e4
LT		 2893
2894static int
a9f1b85e 2895ip_rfc1001_connect(struct TCP_Server_Info *server)
1da177e4
LT		 2896{
2897 int rc = 0;
a9f1b85e
PS		 2898 /*
2899 * some servers require RFC1001 sessinit before sending
2900 * negprot - BB check reconnection in case where second
2901 * sessinit is sent but no second negprot
2902 */
2903 struct rfc1002_session_packet *ses_init_buf;
2904 struct smb_hdr *smb_buf;
2905 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2906 GFP_KERNEL);
2907 if (ses_init_buf) {
2908 ses_init_buf->trailer.session_req.called_len = 32;
2909
2910 if (server->server_RFC1001_name &&
2911 server->server_RFC1001_name[0] != 0)
2912 rfc1002mangle(ses_init_buf->trailer.
2913 session_req.called_name,
2914 server->server_RFC1001_name,
2915 RFC1001_NAME_LEN_WITH_NULL);
2916 else
2917 rfc1002mangle(ses_init_buf->trailer.
2918 session_req.called_name,
2919 DEFAULT_CIFS_CALLED_NAME,
2920 RFC1001_NAME_LEN_WITH_NULL);
2921
2922 ses_init_buf->trailer.session_req.calling_len = 32;
2923
2924 /*
2925 * calling name ends in null (byte 16) from old smb
2926 * convention.
2927 */
2928 if (server->workstation_RFC1001_name &&
2929 server->workstation_RFC1001_name[0] != 0)
2930 rfc1002mangle(ses_init_buf->trailer.
2931 session_req.calling_name,
2932 server->workstation_RFC1001_name,
2933 RFC1001_NAME_LEN_WITH_NULL);
2934 else
2935 rfc1002mangle(ses_init_buf->trailer.
2936 session_req.calling_name,
2937 "LINUX_CIFS_CLNT",
2938 RFC1001_NAME_LEN_WITH_NULL);
2939
2940 ses_init_buf->trailer.session_req.scope1 = 0;
2941 ses_init_buf->trailer.session_req.scope2 = 0;
2942 smb_buf = (struct smb_hdr *)ses_init_buf;
2943
2944 /* sizeof RFC1002_SESSION_REQUEST with no scope */
be8e3b00 2945 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
a9f1b85e
PS		 2946 rc = smb_send(server, smb_buf, 0x44);
2947 kfree(ses_init_buf);
2948 /*
2949 * RFC1001 layer in at least one server
2950 * requires very short break before negprot
2951 * presumably because not expecting negprot
2952 * to follow so fast. This is a simple
2953 * solution that works without
2954 * complicating the code and causes no
2955 * significant slowing down on mount
2956 * for everyone else
2957 */
2958 usleep_range(1000, 2000);
2959 }
2960 /*
2961 * else the negprot may still work without this
2962 * even though malloc failed
2963 */
2964
2965 return rc;
2966}
2967
2968static int
2969generic_ip_connect(struct TCP_Server_Info *server)
2970{
2971 int rc = 0;
6da97910 2972 __be16 sport;
a9f1b85e 2973 int slen, sfamily;
bcf4b106 2974 struct socket *socket = server->ssocket;
a9f1b85e
PS		 2975 struct sockaddr *saddr;
2976
2977 saddr = (struct sockaddr *) &server->dstaddr;
2978
2979 if (server->dstaddr.ss_family == AF_INET6) {
2980 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2981 slen = sizeof(struct sockaddr_in6);
2982 sfamily = AF_INET6;
2983 } else {
2984 sport = ((struct sockaddr_in *) saddr)->sin_port;
2985 slen = sizeof(struct sockaddr_in);
2986 sfamily = AF_INET;
2987 }
1da177e4 2988
bcf4b106 2989 if (socket == NULL) {
f1d0c998
RL		 2990 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2991 IPPROTO_TCP, &socket, 1);
1da177e4 2992 if (rc < 0) {
b6b38f70 2993 cERROR(1, "Error %d creating socket", rc);
a9f1b85e 2994 server->ssocket = NULL;
1da177e4 2995 return rc;
1da177e4 2996 }
bcf4b106
JL		 2997
2998 /* BB other socket options to set KEEPALIVE, NODELAY? */
b6b38f70 2999 cFYI(1, "Socket created");
bcf4b106
JL		 3000 server->ssocket = socket;
3001 socket->sk->sk_allocation = GFP_NOFS;
a9f1b85e
PS		 3002 if (sfamily == AF_INET6)
3003 cifs_reclassify_socket6(socket);
3004 else
3005 cifs_reclassify_socket4(socket);
1da177e4
LT		 3006 }
3007
3eb9a889
BG		 3008 rc = bind_socket(server);
3009 if (rc < 0)
3010 return rc;
3011
bcf4b106
JL		 3012 /*
3013 * Eventually check for other socket options to change from
a9f1b85e
PS		 3014 * the default. sock_setsockopt not used because it expects
3015 * user space buffer
bcf4b106
JL		 3016 */
3017 socket->sk->sk_rcvtimeo = 7 * HZ;
da505c38 3018 socket->sk->sk_sndtimeo = 5 * HZ;
edf1ae40 3019
b387eaeb 3020 /* make the bufsizes depend on wsize/rsize and max requests */
bcf4b106
JL		 3021 if (server->noautotune) {
3022 if (socket->sk->sk_sndbuf < (200 * 1024))
3023 socket->sk->sk_sndbuf = 200 * 1024;
3024 if (socket->sk->sk_rcvbuf < (140 * 1024))
3025 socket->sk->sk_rcvbuf = 140 * 1024;
edf1ae40 3026 }
1da177e4 3027
6a5fa236 3028 if (server->tcp_nodelay) {
a9f1b85e 3029 int val = 1;
6a5fa236
SF		 3030 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
3031 (char *)&val, sizeof(val));
3032 if (rc)
b6b38f70 3033 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
6a5fa236
SF		 3034 }
3035
b6b38f70 3036 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
bcf4b106 3037 socket->sk->sk_sndbuf,
b6b38f70 3038 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
bcf4b106 3039
ee1b3ea9
JL		 3040 rc = socket->ops->connect(socket, saddr, slen, 0);
3041 if (rc < 0) {
3042 cFYI(1, "Error %d connecting to server", rc);
3043 sock_release(socket);
3044 server->ssocket = NULL;
3045 return rc;
3046 }
3047
a9f1b85e
PS		 3048 if (sport == htons(RFC1001_PORT))
3049 rc = ip_rfc1001_connect(server);
50c2f753 3050
1da177e4
LT		 3051 return rc;
3052}
3053
3054static int
a9f1b85e 3055ip_connect(struct TCP_Server_Info *server)
1da177e4 3056{
6da97910 3057 __be16 *sport;
a9f1b85e
PS		 3058 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3059 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
1da177e4 3060
a9f1b85e
PS		 3061 if (server->dstaddr.ss_family == AF_INET6)
3062 sport = &addr6->sin6_port;
3063 else
3064 sport = &addr->sin_port;
1da177e4 3065
a9f1b85e
PS		 3066 if (*sport == 0) {
3067 int rc;
1da177e4 3068
a9f1b85e
PS		 3069 /* try with 445 port at first */
3070 *sport = htons(CIFS_PORT);
3eb9a889 3071
a9f1b85e 3072 rc = generic_ip_connect(server);
1da177e4 3073 if (rc >= 0)
a9f1b85e 3074 return rc;
6a5fa236 3075
a9f1b85e
PS		 3076 /* if it failed, try with 139 port */
3077 *sport = htons(RFC1001_PORT);
6a5fa236
SF		 3078 }
3079
a9f1b85e 3080 return generic_ip_connect(server);
1da177e4
LT		 3081}
3082
6d5786a3 3083void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
2c6292ae 3084 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
8af18971
SF		 3085{
3086 /* if we are reconnecting then should we check to see if
3087 * any requested capabilities changed locally e.g. via
3088 * remount but we can not do much about it here
3089 * if they have (even if we could detect it by the following)
3090 * Perhaps we could add a backpointer to array of sb from tcon
3091 * or if we change to make all sb to same share the same
3092 * sb as NFS - then we only have one backpointer to sb.
3093 * What if we wanted to mount the server share twice once with
3094 * and once without posixacls or posix paths? */
3095 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
50c2f753 3096
c18c842b
SF		 3097 if (vol_info && vol_info->no_linux_ext) {
3098 tcon->fsUnixInfo.Capability = 0;
3099 tcon->unix_ext = 0; /* Unix Extensions disabled */
b6b38f70 3100 cFYI(1, "Linux protocol extensions disabled");
c18c842b
SF		 3101 return;
3102 } else if (vol_info)
3103 tcon->unix_ext = 1; /* Unix Extensions supported */
3104
3105 if (tcon->unix_ext == 0) {
b6b38f70 3106 cFYI(1, "Unix extensions disabled so not set on reconnect");
c18c842b
SF		 3107 return;
3108 }
50c2f753 3109
fb8c4b14 3110 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
8af18971 3111 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
6848b733 3112 cFYI(1, "unix caps which server supports %lld", cap);
8af18971
SF		 3113 /* check for reconnect case in which we do not
3114 want to change the mount behavior if we can avoid it */
fb8c4b14 3115 if (vol_info == NULL) {
50c2f753 3116 /* turn off POSIX ACL and PATHNAMES if not set
8af18971
SF		 3117 originally at mount time */
3118 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3119 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
11b6d645
IM		 3120 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3121 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
b6b38f70 3122 cERROR(1, "POSIXPATH support change");
8af18971 3123 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
11b6d645 3124 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
b6b38f70
JP		 3125 cERROR(1, "possible reconnect error");
3126 cERROR(1, "server disabled POSIX path support");
11b6d645 3127 }
8af18971 3128 }
50c2f753 3129
6848b733
SF		 3130 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3131 cERROR(1, "per-share encryption not supported yet");
3132
8af18971 3133 cap &= CIFS_UNIX_CAP_MASK;
75865f8c 3134 if (vol_info && vol_info->no_psx_acl)
8af18971 3135 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
75865f8c 3136 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
b6b38f70 3137 cFYI(1, "negotiated posix acl support");
2c6292ae
AV		 3138 if (cifs_sb)
3139 cifs_sb->mnt_cifs_flags |=
3140 CIFS_MOUNT_POSIXACL;
8af18971
SF		 3141 }
3142
75865f8c 3143 if (vol_info && vol_info->posix_paths == 0)
8af18971 3144 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
75865f8c 3145 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
b6b38f70 3146 cFYI(1, "negotiate posix pathnames");
2c6292ae
AV		 3147 if (cifs_sb)
3148 cifs_sb->mnt_cifs_flags |=
8af18971
SF		 3149 CIFS_MOUNT_POSIX_PATHS;
3150 }
50c2f753 3151
b6b38f70 3152 cFYI(1, "Negotiate caps 0x%x", (int)cap);
8af18971 3153#ifdef CONFIG_CIFS_DEBUG2
75865f8c 3154 if (cap & CIFS_UNIX_FCNTL_CAP)
b6b38f70 3155 cFYI(1, "FCNTL cap");
75865f8c 3156 if (cap & CIFS_UNIX_EXTATTR_CAP)
b6b38f70 3157 cFYI(1, "EXTATTR cap");
75865f8c 3158 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
b6b38f70 3159 cFYI(1, "POSIX path cap");
75865f8c 3160 if (cap & CIFS_UNIX_XATTR_CAP)
b6b38f70 3161 cFYI(1, "XATTR cap");
75865f8c 3162 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
b6b38f70 3163 cFYI(1, "POSIX ACL cap");
75865f8c 3164 if (cap & CIFS_UNIX_LARGE_READ_CAP)
b6b38f70 3165 cFYI(1, "very large read cap");
75865f8c 3166 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
b6b38f70 3167 cFYI(1, "very large write cap");
6848b733
SF		 3168 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
3169 cFYI(1, "transport encryption cap");
3170 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3171 cFYI(1, "mandatory transport encryption cap");
8af18971
SF		 3172#endif /* CIFS_DEBUG2 */
3173 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
442aa310 3174 if (vol_info == NULL) {
b6b38f70 3175 cFYI(1, "resetting capabilities failed");
442aa310 3176 } else
b6b38f70 3177 cERROR(1, "Negotiating Unix capabilities "
ac3aa2f8
JL		 3178 "with the server failed. Consider "
3179 "mounting with the Unix Extensions "
3180 "disabled if problems are found "
5a44b319 3181 "by specifying the nounix mount "
b6b38f70 3182 "option.");
5a44b319 3183
8af18971
SF		 3184 }
3185 }
3186}
3187
724d9f1c
PS		 3188void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3189 struct cifs_sb_info *cifs_sb)
b1c8d2b4 3190{
2de970ff
JL		 3191 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3192
2ced6f69
AV		 3193 spin_lock_init(&cifs_sb->tlink_tree_lock);
3194 cifs_sb->tlink_tree = RB_ROOT;
3195
25c7f41e 3196 /*
5eba8ab3
JL		 3197 * Temporarily set r/wsize for matching superblock. If we end up using
3198 * new sb then client will later negotiate it downward if needed.
25c7f41e 3199 */
5eba8ab3 3200 cifs_sb->rsize = pvolume_info->rsize;
25c7f41e
PS		 3201 cifs_sb->wsize = pvolume_info->wsize;
3202
3b795210
SF		 3203 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3204 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3205 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3206 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
5206efd6 3207 cFYI(1, "file mode: 0x%hx dir mode: 0x%hx",
b6b38f70 3208 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3b795210 3209
6d20e840 3210 cifs_sb->actimeo = pvolume_info->actimeo;
724d9f1c 3211 cifs_sb->local_nls = pvolume_info->local_nls;
6d20e840 3212
3b795210
SF		 3213 if (pvolume_info->noperm)
3214 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3215 if (pvolume_info->setuids)
3216 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3217 if (pvolume_info->server_ino)
3218 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3219 if (pvolume_info->remap)
3220 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3221 if (pvolume_info->no_xattr)
3222 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3223 if (pvolume_info->sfu_emul)
3224 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3225 if (pvolume_info->nobrl)
3226 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
be652445 3227 if (pvolume_info->nostrictsync)
4717bed6 3228 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
13a6e42a
SF		 3229 if (pvolume_info->mand_lock)
3230 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
d4ffff1f
PS		 3231 if (pvolume_info->rwpidforward)
3232 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3b795210
SF		 3233 if (pvolume_info->cifs_acl)
3234 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3c7c87fd 3235 if (pvolume_info->backupuid_specified) {
3d3ea8e6 3236 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3c7c87fd
SP		 3237 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3238 }
3239 if (pvolume_info->backupgid_specified) {
3d3ea8e6 3240 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3c7c87fd
SP		 3241 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3242 }
3b795210
SF		 3243 if (pvolume_info->override_uid)
3244 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3245 if (pvolume_info->override_gid)
3246 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3247 if (pvolume_info->dynperm)
3248 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
fa1df75d
SJ		 3249 if (pvolume_info->fsc)
3250 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
0eb8a132
JL		 3251 if (pvolume_info->multiuser)
3252 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3253 CIFS_MOUNT_NO_PERM);
d39454ff
PS		 3254 if (pvolume_info->strict_io)
3255 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3b795210 3256 if (pvolume_info->direct_io) {
b6b38f70 3257 cFYI(1, "mounting share using direct i/o");
3b795210
SF		 3258 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3259 }
736a3320
SM		 3260 if (pvolume_info->mfsymlinks) {
3261 if (pvolume_info->sfu_emul) {
3262 cERROR(1, "mount option mfsymlinks ignored if sfu "
3263 "mount option is used");
3264 } else {
3265 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3266 }
3267 }
3b795210
SF		 3268
3269 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
b6b38f70
JP		 3270 cERROR(1, "mount option dynperm ignored if cifsacl "
3271 "mount option supported");
b1c8d2b4
JL		 3272}
3273
b9bce2e9
JL		 3274static void
3275cleanup_volume_info_contents(struct smb_vol *volume_info)
1bfe73c2 3276{
b946845a 3277 kfree(volume_info->username);
1bfe73c2 3278 kzfree(volume_info->password);
13589c43
SF		 3279 if (volume_info->UNCip != volume_info->UNC + 2)
3280 kfree(volume_info->UNCip);
95c75454 3281 kfree(volume_info->UNC);
b946845a
SF		 3282 kfree(volume_info->domainname);
3283 kfree(volume_info->iocharset);
1bfe73c2 3284 kfree(volume_info->prepath);
b9bce2e9
JL		 3285}
3286
3287void
3288cifs_cleanup_volume_info(struct smb_vol *volume_info)
3289{
3290 if (!volume_info)
3291 return;
3292 cleanup_volume_info_contents(volume_info);
1bfe73c2 3293 kfree(volume_info);
1bfe73c2
IM		 3294}
3295
b9bce2e9 3296
2d6d589d 3297#ifdef CONFIG_CIFS_DFS_UPCALL
1bfe73c2
IM		 3298/* build_path_to_root returns full path to root when
3299 * we do not have an exiting connection (tcon) */
3300static char *
b2a0fa15 3301build_unc_path_to_root(const struct smb_vol *vol,
1bfe73c2
IM		 3302 const struct cifs_sb_info *cifs_sb)
3303{
b2a0fa15
JL		 3304 char *full_path, *pos;
3305 unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0;
3306 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
1bfe73c2 3307
b2a0fa15 3308 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
1bfe73c2
IM		 3309 if (full_path == NULL)
3310 return ERR_PTR(-ENOMEM);
3311
b2a0fa15
JL		 3312 strncpy(full_path, vol->UNC, unc_len);
3313 pos = full_path + unc_len;
3314
3315 if (pplen) {
3316 strncpy(pos, vol->prepath, pplen);
3317 pos += pplen;
3318 }
3319
3320 *pos = '\0'; /* add trailing null */
f87d39d9 3321 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
b2a0fa15 3322 cFYI(1, "%s: full_path=%s", __func__, full_path);
1bfe73c2
IM		 3323 return full_path;
3324}
dd613945
SF		 3325
3326/*
3327 * Perform a dfs referral query for a share and (optionally) prefix
3328 *
046462ab
SF		 3329 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3330 * to a string containing updated options for the submount. Otherwise it
3331 * will be left untouched.
dd613945
SF		 3332 *
3333 * Returns the rc from get_dfs_path to the caller, which can be used to
3334 * determine whether there were referrals.
3335 */
3336static int
b669f33c 3337expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
dd613945 3338 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
046462ab 3339 int check_prefix)
dd613945
SF		 3340{
3341 int rc;
3342 unsigned int num_referrals = 0;
3343 struct dfs_info3_param *referrals = NULL;
3344 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3345
3346 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3347 if (IS_ERR(full_path))
3348 return PTR_ERR(full_path);
3349
3350 /* For DFS paths, skip the first '\' of the UNC */
3351 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3352
b669f33c 3353 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
dd613945
SF		 3354 &num_referrals, &referrals,
3355 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3356
3357 if (!rc && num_referrals > 0) {
3358 char *fake_devname = NULL;
3359
3360 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3361 full_path + 1, referrals,
3362 &fake_devname);
3363
3364 free_dfs_info_array(referrals, num_referrals);
046462ab 3365
dd613945
SF		 3366 if (IS_ERR(mdata)) {
3367 rc = PTR_ERR(mdata);
3368 mdata = NULL;
b9bce2e9
JL		 3369 } else {
3370 cleanup_volume_info_contents(volume_info);
3371 memset(volume_info, '\0', sizeof(*volume_info));
3372 rc = cifs_setup_volume_info(volume_info, mdata,
3373 fake_devname);
dd613945 3374 }
b9bce2e9
JL		 3375 kfree(fake_devname);
3376 kfree(cifs_sb->mountdata);
046462ab 3377 cifs_sb->mountdata = mdata;
dd613945
SF		 3378 }
3379 kfree(full_path);
3380 return rc;
3381}
2d6d589d 3382#endif
1bfe73c2 3383
04db79b0
JL		 3384static int
3385cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3386 const char *devname)
1da177e4 3387{
724d9f1c 3388 int rc = 0;
1da177e4 3389
04db79b0
JL		 3390 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3391 return -EINVAL;
1da177e4 3392
23db65f5 3393
7586b765 3394 if (volume_info->nullauth) {
04febabc
JL		 3395 cFYI(1, "Anonymous login");
3396 kfree(volume_info->username);
3397 volume_info->username = NULL;
7586b765 3398 } else if (volume_info->username) {
1da177e4 3399 /* BB fixme parse for domain name here */
b6b38f70 3400 cFYI(1, "Username: %s", volume_info->username);
1da177e4 3401 } else {
bf820679 3402 cifserror("No username specified");
50c2f753
SF		 3403 /* In userspace mount helper we can get user name from alternate
3404 locations such as env variables and files on disk */
04db79b0 3405 return -EINVAL;
1da177e4
LT		 3406 }
3407
1da177e4 3408 /* this is needed for ASCII cp to Unicode converts */
7586b765 3409 if (volume_info->iocharset == NULL) {
a5fc4ce0
JL		 3410 /* load_nls_default cannot return null */
3411 volume_info->local_nls = load_nls_default();
1da177e4 3412 } else {
a5fc4ce0
JL		 3413 volume_info->local_nls = load_nls(volume_info->iocharset);
3414 if (volume_info->local_nls == NULL) {
b6b38f70
JP		 3415 cERROR(1, "CIFS mount error: iocharset %s not found",
3416 volume_info->iocharset);
04db79b0 3417 return -ELIBACC;
1da177e4
LT		 3418 }
3419 }
724d9f1c 3420
724d9f1c
PS		 3421 return rc;
3422}
3423
04db79b0
JL		 3424struct smb_vol *
3425cifs_get_volume_info(char *mount_data, const char *devname)
3426{
3427 int rc;
3428 struct smb_vol *volume_info;
3429
3430 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
3431 if (!volume_info)
3432 return ERR_PTR(-ENOMEM);
3433
3434 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3435 if (rc) {
3436 cifs_cleanup_volume_info(volume_info);
3437 volume_info = ERR_PTR(rc);
3438 }
3439
3440 return volume_info;
3441}
3442
724d9f1c 3443int
2c6292ae 3444cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
724d9f1c 3445{
1daaae8f 3446 int rc;
6d5786a3 3447 unsigned int xid;
af4281dc 3448 struct cifs_ses *ses;
96daf2b0 3449 struct cifs_tcon *tcon;
af4281dc 3450 struct TCP_Server_Info *server;
724d9f1c
PS		 3451 char *full_path;
3452 struct tcon_link *tlink;
3453#ifdef CONFIG_CIFS_DFS_UPCALL
3454 int referral_walks_count = 0;
20547490 3455#endif
dd854466
AV		 3456
3457 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3458 if (rc)
3459 return rc;
3460
20547490 3461#ifdef CONFIG_CIFS_DFS_UPCALL
724d9f1c
PS		 3462try_mount_again:
3463 /* cleanup activities if we're chasing a referral */
3464 if (referral_walks_count) {
3465 if (tcon)
3466 cifs_put_tcon(tcon);
af4281dc
PS		 3467 else if (ses)
3468 cifs_put_smb_ses(ses);
724d9f1c 3469
6d5786a3 3470 free_xid(xid);
724d9f1c
PS		 3471 }
3472#endif
1daaae8f 3473 rc = 0;
724d9f1c 3474 tcon = NULL;
af4281dc
PS		 3475 ses = NULL;
3476 server = NULL;
724d9f1c
PS		 3477 full_path = NULL;
3478 tlink = NULL;
3479
6d5786a3 3480 xid = get_xid();
1da177e4 3481
63c038c2 3482 /* get a reference to a tcp session */
af4281dc
PS		 3483 server = cifs_get_tcp_session(volume_info);
3484 if (IS_ERR(server)) {
3485 rc = PTR_ERR(server);
dd854466 3486 bdi_destroy(&cifs_sb->bdi);
63c038c2 3487 goto out;
1da177e4
LT		 3488 }
3489
36988c76 3490 /* get a reference to a SMB session */
af4281dc
PS		 3491 ses = cifs_get_smb_ses(server, volume_info);
3492 if (IS_ERR(ses)) {
3493 rc = PTR_ERR(ses);
3494 ses = NULL;
36988c76 3495 goto mount_fail_check;
1da177e4 3496 }
50c2f753 3497
d00c28de 3498 /* search for existing tcon to this server share */
af4281dc 3499 tcon = cifs_get_tcon(ses, volume_info);
d00c28de
JL		 3500 if (IS_ERR(tcon)) {
3501 rc = PTR_ERR(tcon);
3502 tcon = NULL;
1bfe73c2 3503 goto remote_path_check;
d00c28de 3504 }
1bfe73c2 3505
d82c2df5 3506 /* tell server which Unix caps we support */
29e20f9c 3507 if (cap_unix(tcon->ses)) {
d82c2df5
SF		 3508 /* reset of caps checks mount to see if unix extensions
3509 disabled for just this mount */
2c6292ae 3510 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
6848b733
SF		 3511 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3512 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3513 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3514 rc = -EACCES;
3515 goto mount_fail_check;
3516 }
3517 } else
d82c2df5 3518 tcon->unix_ext = 0; /* server does not support them */
c18c842b 3519
af4281dc
PS		 3520 /* do not care if a following call succeed - informational */
3521 if (!tcon->ipc && server->ops->qfs_tcon)
3522 server->ops->qfs_tcon(xid, tcon);
6848b733 3523
24985c53
PS		 3524 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3525 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
f7910cbd 3526
66bfaadc 3527 /* tune readahead according to rsize */
8f71465c 3528 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
f7910cbd 3529
1bfe73c2 3530remote_path_check:
c1508ca2
SF		 3531#ifdef CONFIG_CIFS_DFS_UPCALL
3532 /*
3533 * Perform an unconditional check for whether there are DFS
3534 * referrals for this path without prefix, to provide support
3535 * for DFS referrals from w2k8 servers which don't seem to respond
3536 * with PATH_NOT_COVERED to requests that include the prefix.
3537 * Chase the referral if found, otherwise continue normally.
3538 */
3539 if (referral_walks_count == 0) {
af4281dc
PS		 3540 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3541 false);
c1508ca2
SF		 3542 if (!refrc) {
3543 referral_walks_count++;
3544 goto try_mount_again;
3545 }
3546 }
3547#endif
3548
f87d39d9 3549 /* check if a whole path is not remote */
70945643 3550 if (!rc && tcon) {
68889f26
PS		 3551 if (!server->ops->is_path_accessible) {
3552 rc = -ENOSYS;
3553 goto mount_fail_check;
3554 }
e4cce94c 3555 /* build_path_to_root works only when we have a valid tcon */
9224dfc2 3556 full_path = build_path_to_root(volume_info, cifs_sb, tcon);
e4cce94c
IM		 3557 if (full_path == NULL) {
3558 rc = -ENOMEM;
3559 goto mount_fail_check;
3560 }
68889f26
PS		 3561 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3562 full_path);
03ceace5 3563 if (rc != 0 && rc != -EREMOTE) {
e4cce94c
IM		 3564 kfree(full_path);
3565 goto mount_fail_check;
3566 }
3567 kfree(full_path);
3568 }
3569
1bfe73c2
IM		 3570 /* get referral if needed */
3571 if (rc == -EREMOTE) {
d036f50f 3572#ifdef CONFIG_CIFS_DFS_UPCALL
5c2503a8
IM		 3573 if (referral_walks_count > MAX_NESTED_LINKS) {
3574 /*
3575 * BB: when we implement proper loop detection,
3576 * we will remove this check. But now we need it
3577 * to prevent an indefinite loop if 'DFS tree' is
3578 * misconfigured (i.e. has loops).
3579 */
3580 rc = -ELOOP;
3581 goto mount_fail_check;
3582 }
1bfe73c2 3583
af4281dc 3584 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
7b91e266 3585
dd613945 3586 if (!rc) {
5c2503a8 3587 referral_walks_count++;
1bfe73c2
IM		 3588 goto try_mount_again;
3589 }
dd613945 3590 goto mount_fail_check;
d036f50f
SF		 3591#else /* No DFS support, return error on mount */
3592 rc = -EOPNOTSUPP;
3593#endif
1bfe73c2
IM		 3594 }
3595
9d002df4
JL		 3596 if (rc)
3597 goto mount_fail_check;
3598
3599 /* now, hang the tcon off of the superblock */
3600 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3601 if (tlink == NULL) {
3602 rc = -ENOMEM;
3603 goto mount_fail_check;
3604 }
3605
af4281dc 3606 tlink->tl_uid = ses->linux_uid;
9d002df4
JL		 3607 tlink->tl_tcon = tcon;
3608 tlink->tl_time = jiffies;
3609 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3610 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3611
b647c35f 3612 cifs_sb->master_tlink = tlink;
9d002df4 3613 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 3614 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
9d002df4 3615 spin_unlock(&cifs_sb->tlink_tree_lock);
413e661c 3616
da472fc8 3617 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 3618 TLINK_IDLE_EXPIRE);
3619
1bfe73c2
IM		 3620mount_fail_check:
3621 /* on error free sesinfo and tcon struct if needed */
3622 if (rc) {
1bfe73c2 3623 /* If find_unc succeeded then rc == 0 so we can not end */
25985edc 3624 /* up accidentally freeing someone elses tcon struct */
1bfe73c2
IM		 3625 if (tcon)
3626 cifs_put_tcon(tcon);
af4281dc
PS		 3627 else if (ses)
3628 cifs_put_smb_ses(ses);
1bfe73c2 3629 else
af4281dc 3630 cifs_put_tcp_session(server);
dd854466 3631 bdi_destroy(&cifs_sb->bdi);
1bfe73c2
IM		 3632 }
3633
70fe7dc0 3634out:
6d5786a3 3635 free_xid(xid);
1da177e4
LT		 3636 return rc;
3637}
3638
8d1bca32
JL		 3639/*
3640 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3641 * pointer may be NULL.
3642 */
1da177e4 3643int
2e6e02ab 3644CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
96daf2b0 3645 const char *tree, struct cifs_tcon *tcon,
1da177e4
LT		 3646 const struct nls_table *nls_codepage)
3647{
3648 struct smb_hdr *smb_buffer;
3649 struct smb_hdr *smb_buffer_response;
3650 TCONX_REQ *pSMB;
3651 TCONX_RSP *pSMBr;
3652 unsigned char *bcc_ptr;
3653 int rc = 0;
690c522f
JL		 3654 int length;
3655 __u16 bytes_left, count;
1da177e4
LT		 3656
3657 if (ses == NULL)
3658 return -EIO;
3659
3660 smb_buffer = cifs_buf_get();
ca43e3be 3661 if (smb_buffer == NULL)
1da177e4 3662 return -ENOMEM;
ca43e3be 3663
1da177e4
LT		 3664 smb_buffer_response = smb_buffer;
3665
3666 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3667 NULL /*no tid */ , 4 /*wct */ );
1982c344 3668
88257360 3669 smb_buffer->Mid = get_next_mid(ses->server);
1da177e4
LT		 3670 smb_buffer->Uid = ses->Suid;
3671 pSMB = (TCONX_REQ *) smb_buffer;
3672 pSMBr = (TCONX_RSP *) smb_buffer_response;
3673
3674 pSMB->AndXCommand = 0xFF;
3675 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
1da177e4 3676 bcc_ptr = &pSMB->Password[0];
8d1bca32 3677 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
eeac8047 3678 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
7c7b25bc 3679 *bcc_ptr = 0; /* password is null byte */
eeac8047 3680 bcc_ptr++; /* skip password */
7c7b25bc 3681 /* already aligned so no need to do it below */
eeac8047 3682 } else {
540b2e37 3683 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
eeac8047
SF		 3684 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3685 specified as required (when that support is added to
3686 the vfs in the future) as only NTLM or the much
7c7b25bc 3687 weaker LANMAN (which we do not send by default) is accepted
eeac8047
SF		 3688 by Samba (not sure whether other servers allow
3689 NTLMv2 password here) */
7c7b25bc 3690#ifdef CONFIG_CIFS_WEAK_PW_HASH
04912d6a 3691 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
00e485b0 3692 (ses->server->secType == LANMAN))
d3ba50b1 3693 calc_lanman_hash(tcon->password, ses->server->cryptkey,
96daf2b0 3694 ses->server->sec_mode &
4e53a3fb
JL		 3695 SECMODE_PW_ENCRYPT ? true : false,
3696 bcc_ptr);
7c7b25bc
SF		 3697 else
3698#endif /* CIFS_WEAK_PW_HASH */
ee2c9258 3699 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
9ef5992e 3700 bcc_ptr, nls_codepage);
eeac8047 3701
540b2e37 3702 bcc_ptr += CIFS_AUTH_RESP_SIZE;
fb8c4b14 3703 if (ses->capabilities & CAP_UNICODE) {
7c7b25bc
SF		 3704 /* must align unicode strings */
3705 *bcc_ptr = 0; /* null byte password */
3706 bcc_ptr++;
3707 }
eeac8047 3708 }
1da177e4 3709
96daf2b0 3710 if (ses->server->sec_mode &
a878fb22 3711 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1da177e4
LT		 3712 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3713
3714 if (ses->capabilities & CAP_STATUS32) {
3715 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3716 }
3717 if (ses->capabilities & CAP_DFS) {
3718 smb_buffer->Flags2 |= SMBFLG2_DFS;
3719 }
3720 if (ses->capabilities & CAP_UNICODE) {
3721 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3722 length =
acbbb76a 3723 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
50c2f753 3724 6 /* max utf8 char length in bytes */ *
a878fb22
SF		 3725 (/* server len*/ + 256 /* share len */), nls_codepage);
3726 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
1da177e4
LT		 3727 bcc_ptr += 2; /* skip trailing null */
3728 } else { /* ASCII */
1da177e4
LT		 3729 strcpy(bcc_ptr, tree);
3730 bcc_ptr += strlen(tree) + 1;
3731 }
3732 strcpy(bcc_ptr, "?????");
3733 bcc_ptr += strlen("?????");
3734 bcc_ptr += 1;
3735 count = bcc_ptr - &pSMB->Password[0];
be8e3b00
SF		 3736 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3737 pSMB->hdr.smb_buf_length) + count);
1da177e4
LT		 3738 pSMB->ByteCount = cpu_to_le16(count);
3739
133672ef 3740 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
7749981e 3741 0);
1da177e4 3742
1da177e4
LT		 3743 /* above now done in SendReceive */
3744 if ((rc == 0) && (tcon != NULL)) {
0e0d2cf3
SF		 3745 bool is_unicode;
3746
1da177e4 3747 tcon->tidStatus = CifsGood;
3b795210 3748 tcon->need_reconnect = false;
1da177e4
LT		 3749 tcon->tid = smb_buffer_response->Tid;
3750 bcc_ptr = pByteArea(smb_buffer_response);
690c522f 3751 bytes_left = get_bcc(smb_buffer_response);
cc20c031 3752 length = strnlen(bcc_ptr, bytes_left - 2);
0e0d2cf3
SF		 3753 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3754 is_unicode = true;
3755 else
3756 is_unicode = false;
3757
cc20c031 3758
50c2f753 3759 /* skip service field (NB: this field is always ASCII) */
7f8ed420
SF		 3760 if (length == 3) {
3761 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3762 (bcc_ptr[2] == 'C')) {
b6b38f70 3763 cFYI(1, "IPC connection");
7f8ed420
SF		 3764 tcon->ipc = 1;
3765 }
3766 } else if (length == 2) {
3767 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3768 /* the most common case */
b6b38f70 3769 cFYI(1, "disk share connection");
7f8ed420
SF		 3770 }
3771 }
50c2f753 3772 bcc_ptr += length + 1;
cc20c031 3773 bytes_left -= (length + 1);
1da177e4 3774 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
cc20c031
JL		 3775
3776 /* mostly informational -- no need to fail on error here */
90a98b2f 3777 kfree(tcon->nativeFileSystem);
acbbb76a 3778 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
0e0d2cf3 3779 bytes_left, is_unicode,
cc20c031
JL		 3780 nls_codepage);
3781
b6b38f70 3782 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
cc20c031 3783
fb8c4b14 3784 if ((smb_buffer_response->WordCount == 3) ||
1a4e15a0
SF		 3785 (smb_buffer_response->WordCount == 7))
3786 /* field is in same location */
3979877e
SF		 3787 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3788 else
3789 tcon->Flags = 0;
b6b38f70 3790 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
1da177e4 3791 } else if ((rc == 0) && tcon == NULL) {
50c2f753 3792 /* all we need to save for IPC$ connection */
1da177e4
LT		 3793 ses->ipc_tid = smb_buffer_response->Tid;
3794 }
3795
a8a11d39 3796 cifs_buf_release(smb_buffer);
1da177e4
LT		 3797 return rc;
3798}
3799
2a9b9951
AV		 3800void
3801cifs_umount(struct cifs_sb_info *cifs_sb)
1da177e4 3802{
b647c35f
JL		 3803 struct rb_root *root = &cifs_sb->tlink_tree;
3804 struct rb_node *node;
3805 struct tcon_link *tlink;
9d002df4 3806
2de970ff
JL		 3807 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3808
b647c35f
JL		 3809 spin_lock(&cifs_sb->tlink_tree_lock);
3810 while ((node = rb_first(root))) {
3811 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3812 cifs_get_tlink(tlink);
3813 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3814 rb_erase(node, root);
1da177e4 3815
b647c35f
JL		 3816 spin_unlock(&cifs_sb->tlink_tree_lock);
3817 cifs_put_tlink(tlink);
3818 spin_lock(&cifs_sb->tlink_tree_lock);
3819 }
3820 spin_unlock(&cifs_sb->tlink_tree_lock);
50c2f753 3821
dd854466 3822 bdi_destroy(&cifs_sb->bdi);
d757d71b
AV		 3823 kfree(cifs_sb->mountdata);
3824 unload_nls(cifs_sb->local_nls);
3825 kfree(cifs_sb);
50c2f753 3826}
1da177e4 3827
286170aa
PS		 3828int
3829cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
1da177e4
LT		 3830{
3831 int rc = 0;
198b5682 3832 struct TCP_Server_Info *server = ses->server;
1da177e4 3833
286170aa
PS		 3834 if (!server->ops->need_neg || !server->ops->negotiate)
3835 return -ENOSYS;
3836
198b5682 3837 /* only send once per connect */
286170aa 3838 if (!server->ops->need_neg(server))
198b5682
JL		 3839 return 0;
3840
45275789 3841 set_credits(server, 1);
286170aa
PS		 3842
3843 rc = server->ops->negotiate(xid, ses);
198b5682
JL		 3844 if (rc == 0) {
3845 spin_lock(&GlobalMid_Lock);
7fdbaa1b 3846 if (server->tcpStatus == CifsNeedNegotiate)
198b5682
JL		 3847 server->tcpStatus = CifsGood;
3848 else
3849 rc = -EHOSTDOWN;
3850 spin_unlock(&GlobalMid_Lock);
198b5682
JL		 3851 }
3852
3853 return rc;
3854}
3855
58c45c58
PS		 3856int
3857cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3858 struct nls_table *nls_info)
198b5682 3859{
58c45c58 3860 int rc = -ENOSYS;
198b5682 3861 struct TCP_Server_Info *server = ses->server;
26b994fa 3862
198b5682
JL		 3863 ses->flags = 0;
3864 ses->capabilities = server->capabilities;
26b994fa 3865 if (linuxExtEnabled == 0)
29e20f9c 3866 ses->capabilities &= (~server->vals->cap_unix);
20418acd 3867
b6b38f70 3868 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
96daf2b0 3869 server->sec_mode, server->capabilities, server->timeAdj);
cb7691b6 3870
58c45c58
PS		 3871 if (server->ops->sess_setup)
3872 rc = server->ops->sess_setup(xid, ses, nls_info);
3873
26b994fa 3874 if (rc) {
b6b38f70 3875 cERROR(1, "Send error in SessSetup = %d", rc);
26b994fa 3876 } else {
5d0d2882
SP		 3877 mutex_lock(&ses->server->srv_mutex);
3878 if (!server->session_estab) {
21e73393 3879 server->session_key.response = ses->auth_key.response;
5d0d2882 3880 server->session_key.len = ses->auth_key.len;
21e73393
SP		 3881 server->sequence_number = 0x2;
3882 server->session_estab = true;
3883 ses->auth_key.response = NULL;
5d0d2882
SP		 3884 }
3885 mutex_unlock(&server->srv_mutex);
3886
b6b38f70 3887 cFYI(1, "CIFS Session Established successfully");
20418acd 3888 spin_lock(&GlobalMid_Lock);
198b5682
JL		 3889 ses->status = CifsGood;
3890 ses->need_reconnect = false;
20418acd 3891 spin_unlock(&GlobalMid_Lock);
1da177e4 3892 }
26b994fa 3893
21e73393
SP		 3894 kfree(ses->auth_key.response);
3895 ses->auth_key.response = NULL;
3896 ses->auth_key.len = 0;
d3686d54
SP		 3897 kfree(ses->ntlmssp);
3898 ses->ntlmssp = NULL;
21e73393 3899
1da177e4
LT		 3900 return rc;
3901}
3902
8a8798a5
JL		 3903static int
3904cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3905{
3906 switch (ses->server->secType) {
3907 case Kerberos:
3908 vol->secFlg = CIFSSEC_MUST_KRB5;
3909 return 0;
3910 case NTLMv2:
3911 vol->secFlg = CIFSSEC_MUST_NTLMV2;
3912 break;
3913 case NTLM:
3914 vol->secFlg = CIFSSEC_MUST_NTLM;
3915 break;
3916 case RawNTLMSSP:
3917 vol->secFlg = CIFSSEC_MUST_NTLMSSP;
3918 break;
3919 case LANMAN:
3920 vol->secFlg = CIFSSEC_MUST_LANMAN;
3921 break;
3922 }
3923
3924 return cifs_set_cifscreds(vol, ses);
3925}
3926
96daf2b0 3927static struct cifs_tcon *
9d002df4
JL		 3928cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid)
3929{
8a8798a5 3930 int rc;
96daf2b0
SF		 3931 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3932 struct cifs_ses *ses;
3933 struct cifs_tcon *tcon = NULL;
9d002df4 3934 struct smb_vol *vol_info;
9d002df4
JL		 3935
3936 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
803ab977
DC		 3937 if (vol_info == NULL)
3938 return ERR_PTR(-ENOMEM);
9d002df4 3939
9d002df4
JL		 3940 vol_info->local_nls = cifs_sb->local_nls;
3941 vol_info->linux_uid = fsuid;
3942 vol_info->cred_uid = fsuid;
3943 vol_info->UNC = master_tcon->treeName;
3944 vol_info->retry = master_tcon->retry;
3945 vol_info->nocase = master_tcon->nocase;
3946 vol_info->local_lease = master_tcon->local_lease;
3947 vol_info->no_linux_ext = !master_tcon->unix_ext;
3948
8a8798a5
JL		 3949 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3950 if (rc) {
3951 tcon = ERR_PTR(rc);
3952 goto out;
3953 }
9d002df4
JL		 3954
3955 /* get a reference for the same TCP session */
3f9bcca7 3956 spin_lock(&cifs_tcp_ses_lock);
9d002df4 3957 ++master_tcon->ses->server->srv_count;
3f9bcca7 3958 spin_unlock(&cifs_tcp_ses_lock);
9d002df4
JL		 3959
3960 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3961 if (IS_ERR(ses)) {
96daf2b0 3962 tcon = (struct cifs_tcon *)ses;
9d002df4
JL		 3963 cifs_put_tcp_session(master_tcon->ses->server);
3964 goto out;
3965 }
3966
3967 tcon = cifs_get_tcon(ses, vol_info);
3968 if (IS_ERR(tcon)) {
3969 cifs_put_smb_ses(ses);
3970 goto out;
3971 }
3972
29e20f9c 3973 if (cap_unix(ses))
9d002df4
JL		 3974 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3975out:
8a8798a5
JL		 3976 kfree(vol_info->username);
3977 kfree(vol_info->password);
9d002df4
JL		 3978 kfree(vol_info);
3979
3980 return tcon;
3981}
3982
96daf2b0 3983struct cifs_tcon *
9d002df4
JL		 3984cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3985{
3986 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3987}
3988
3989static int
3990cifs_sb_tcon_pending_wait(void *unused)
3991{
3992 schedule();
3993 return signal_pending(current) ? -ERESTARTSYS : 0;
3994}
3995
b647c35f
JL		 3996/* find and return a tlink with given uid */
3997static struct tcon_link *
3998tlink_rb_search(struct rb_root *root, uid_t uid)
3999{
4000 struct rb_node *node = root->rb_node;
4001 struct tcon_link *tlink;
4002
4003 while (node) {
4004 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
4005
4006 if (tlink->tl_uid > uid)
4007 node = node->rb_left;
4008 else if (tlink->tl_uid < uid)
4009 node = node->rb_right;
4010 else
4011 return tlink;
4012 }
4013 return NULL;
4014}
4015
4016/* insert a tcon_link into the tree */
4017static void
4018tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
4019{
4020 struct rb_node **new = &(root->rb_node), *parent = NULL;
4021 struct tcon_link *tlink;
4022
4023 while (*new) {
4024 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
4025 parent = *new;
4026
4027 if (tlink->tl_uid > new_tlink->tl_uid)
4028 new = &((*new)->rb_left);
4029 else
4030 new = &((*new)->rb_right);
4031 }
4032
4033 rb_link_node(&new_tlink->tl_rbnode, parent, new);
4034 rb_insert_color(&new_tlink->tl_rbnode, root);
4035}
4036
9d002df4
JL		 4037/*
4038 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
4039 * current task.
4040 *
4041 * If the superblock doesn't refer to a multiuser mount, then just return
4042 * the master tcon for the mount.
4043 *
6ef933a3 4044 * First, search the rbtree for an existing tcon for this fsuid. If one
9d002df4
JL		 4045 * exists, then check to see if it's pending construction. If it is then wait
4046 * for construction to complete. Once it's no longer pending, check to see if
4047 * it failed and either return an error or retry construction, depending on
4048 * the timeout.
4049 *
4050 * If one doesn't exist then insert a new tcon_link struct into the tree and
4051 * try to construct a new one.
4052 */
4053struct tcon_link *
4054cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4055{
4056 int ret;
b647c35f 4057 uid_t fsuid = current_fsuid();
9d002df4
JL		 4058 struct tcon_link *tlink, *newtlink;
4059
4060 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4061 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4062
4063 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 4064 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4065 if (tlink)
4066 cifs_get_tlink(tlink);
4067 spin_unlock(&cifs_sb->tlink_tree_lock);
4068
4069 if (tlink == NULL) {
4070 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4071 if (newtlink == NULL)
4072 return ERR_PTR(-ENOMEM);
b647c35f 4073 newtlink->tl_uid = fsuid;
9d002df4
JL		 4074 newtlink->tl_tcon = ERR_PTR(-EACCES);
4075 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4076 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4077 cifs_get_tlink(newtlink);
4078
9d002df4
JL		 4079 spin_lock(&cifs_sb->tlink_tree_lock);
4080 /* was one inserted after previous search? */
b647c35f 4081 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4082 if (tlink) {
4083 cifs_get_tlink(tlink);
4084 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4085 kfree(newtlink);
4086 goto wait_for_construction;
4087 }
9d002df4 4088 tlink = newtlink;
b647c35f
JL		 4089 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4090 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4091 } else {
4092wait_for_construction:
4093 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4094 cifs_sb_tcon_pending_wait,
4095 TASK_INTERRUPTIBLE);
4096 if (ret) {
4097 cifs_put_tlink(tlink);
4098 return ERR_PTR(ret);
4099 }
4100
4101 /* if it's good, return it */
4102 if (!IS_ERR(tlink->tl_tcon))
4103 return tlink;
4104
4105 /* return error if we tried this already recently */
4106 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4107 cifs_put_tlink(tlink);
4108 return ERR_PTR(-EACCES);
4109 }
4110
4111 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4112 goto wait_for_construction;
4113 }
4114
4115 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4116 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4117 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4118
4119 if (IS_ERR(tlink->tl_tcon)) {
4120 cifs_put_tlink(tlink);
4121 return ERR_PTR(-EACCES);
4122 }
4123
4124 return tlink;
4125}
2de970ff
JL		 4126
4127/*
4128 * periodic workqueue job that scans tcon_tree for a superblock and closes
4129 * out tcons.
4130 */
4131static void
4132cifs_prune_tlinks(struct work_struct *work)
4133{
4134 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4135 prune_tlinks.work);
b647c35f
JL		 4136 struct rb_root *root = &cifs_sb->tlink_tree;
4137 struct rb_node *node = rb_first(root);
4138 struct rb_node *tmp;
4139 struct tcon_link *tlink;
2de970ff 4140
b647c35f
JL		 4141 /*
4142 * Because we drop the spinlock in the loop in order to put the tlink
4143 * it's not guarded against removal of links from the tree. The only
4144 * places that remove entries from the tree are this function and
4145 * umounts. Because this function is non-reentrant and is canceled
4146 * before umount can proceed, this is safe.
4147 */
4148 spin_lock(&cifs_sb->tlink_tree_lock);
4149 node = rb_first(root);
4150 while (node != NULL) {
4151 tmp = node;
4152 node = rb_next(tmp);
4153 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4154
4155 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4156 atomic_read(&tlink->tl_count) != 0 ||
4157 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4158 continue;
2de970ff 4159
b647c35f
JL		 4160 cifs_get_tlink(tlink);
4161 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4162 rb_erase(tmp, root);
4163
4164 spin_unlock(&cifs_sb->tlink_tree_lock);
4165 cifs_put_tlink(tlink);
4166 spin_lock(&cifs_sb->tlink_tree_lock);
4167 }
4168 spin_unlock(&cifs_sb->tlink_tree_lock);
2de970ff 4169
da472fc8 4170 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 4171 TLINK_IDLE_EXPIRE);
4172}
Linux kernel - Deliverables
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