]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - fs/cifs/connect.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'late/dt' into next/dt2
[mirror_ubuntu-artful-kernel.git] / fs / cifs / connect.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/cifs/connect.c
3 *
1080ef75 4 * Copyright (C) International Business Machines Corp., 2002,2011
1da177e4
LT		 5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
fb8c4b14 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1da177e4
LT		 20 */
21#include <linux/fs.h>
22#include <linux/net.h>
23#include <linux/string.h>
24#include <linux/list.h>
25#include <linux/wait.h>
5a0e3ad6 26#include <linux/slab.h>
1da177e4
LT		 27#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
b8643e1b 31#include <linux/delay.h>
f191401f 32#include <linux/completion.h>
aaf737ad 33#include <linux/kthread.h>
0ae0efad 34#include <linux/pagevec.h>
7dfb7103 35#include <linux/freezer.h>
5c2503a8 36#include <linux/namei.h>
1da177e4
LT		 37#include <asm/uaccess.h>
38#include <asm/processor.h>
50b64e3b 39#include <linux/inet.h>
143cb494 40#include <linux/module.h>
8a8798a5 41#include <keys/user-type.h>
0e2bedaa 42#include <net/ipv6.h>
8830d7e0
SP		 43#include <linux/parser.h>
44
1da177e4
LT		 45#include "cifspdu.h"
46#include "cifsglob.h"
47#include "cifsproto.h"
48#include "cifs_unicode.h"
49#include "cifs_debug.h"
50#include "cifs_fs_sb.h"
51#include "ntlmssp.h"
52#include "nterr.h"
53#include "rfc1002pdu.h"
488f1d2d 54#include "fscache.h"
1da177e4
LT		 55
56#define CIFS_PORT 445
57#define RFC1001_PORT 139
58
1da177e4
LT		 59extern mempool_t *cifs_req_poolp;
60
2de970ff 61/* FIXME: should these be tunable? */
9d002df4 62#define TLINK_ERROR_EXPIRE (1 * HZ)
2de970ff 63#define TLINK_IDLE_EXPIRE (600 * HZ)
9d002df4 64
8830d7e0
SP		 65enum {
66
67 /* Mount options that take no arguments */
68 Opt_user_xattr, Opt_nouser_xattr,
69 Opt_forceuid, Opt_noforceuid,
72bd481f 70 Opt_forcegid, Opt_noforcegid,
8830d7e0
SP		 71 Opt_noblocksend, Opt_noautotune,
72 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
73 Opt_mapchars, Opt_nomapchars, Opt_sfu,
74 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
75 Opt_noposixpaths, Opt_nounix,
76 Opt_nocase,
77 Opt_brl, Opt_nobrl,
78 Opt_forcemandatorylock, Opt_setuids,
79 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
80 Opt_nohard, Opt_nosoft,
81 Opt_nointr, Opt_intr,
82 Opt_nostrictsync, Opt_strictsync,
83 Opt_serverino, Opt_noserverino,
84 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
85 Opt_acl, Opt_noacl, Opt_locallease,
1b359204 86 Opt_sign, Opt_seal, Opt_noac,
8830d7e0 87 Opt_fsc, Opt_mfsymlinks,
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,
25189643 100 Opt_iocharset,
8830d7e0 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" },
72bd481f
JL		 121 { Opt_forcegid, "forcegid" },
122 { Opt_noforcegid, "noforcegid" },
8830d7e0
SP		 123 { Opt_noblocksend, "noblocksend" },
124 { Opt_noautotune, "noautotune" },
125 { Opt_hard, "hard" },
126 { Opt_soft, "soft" },
127 { Opt_perm, "perm" },
128 { Opt_noperm, "noperm" },
129 { Opt_mapchars, "mapchars" },
130 { Opt_nomapchars, "nomapchars" },
131 { Opt_sfu, "sfu" },
132 { Opt_nosfu, "nosfu" },
133 { Opt_nodfs, "nodfs" },
134 { Opt_posixpaths, "posixpaths" },
135 { Opt_noposixpaths, "noposixpaths" },
136 { Opt_nounix, "nounix" },
137 { Opt_nounix, "nolinux" },
138 { Opt_nocase, "nocase" },
139 { Opt_nocase, "ignorecase" },
140 { Opt_brl, "brl" },
141 { Opt_nobrl, "nobrl" },
142 { Opt_nobrl, "nolock" },
143 { Opt_forcemandatorylock, "forcemandatorylock" },
5cfdddcf 144 { Opt_forcemandatorylock, "forcemand" },
8830d7e0
SP		 145 { Opt_setuids, "setuids" },
146 { Opt_nosetuids, "nosetuids" },
147 { Opt_dynperm, "dynperm" },
148 { Opt_nodynperm, "nodynperm" },
149 { Opt_nohard, "nohard" },
150 { Opt_nosoft, "nosoft" },
151 { Opt_nointr, "nointr" },
152 { Opt_intr, "intr" },
153 { Opt_nostrictsync, "nostrictsync" },
154 { Opt_strictsync, "strictsync" },
155 { Opt_serverino, "serverino" },
156 { Opt_noserverino, "noserverino" },
157 { Opt_rwpidforward, "rwpidforward" },
158 { Opt_cifsacl, "cifsacl" },
159 { Opt_nocifsacl, "nocifsacl" },
160 { Opt_acl, "acl" },
161 { Opt_noacl, "noacl" },
162 { Opt_locallease, "locallease" },
163 { Opt_sign, "sign" },
164 { Opt_seal, "seal" },
8830d7e0
SP		 165 { Opt_noac, "noac" },
166 { Opt_fsc, "fsc" },
167 { Opt_mfsymlinks, "mfsymlinks" },
168 { Opt_multiuser, "multiuser" },
d8162558 169 { Opt_sloppy, "sloppy" },
8830d7e0
SP		 170
171 { Opt_backupuid, "backupuid=%s" },
172 { Opt_backupgid, "backupgid=%s" },
173 { Opt_uid, "uid=%s" },
174 { Opt_cruid, "cruid=%s" },
175 { Opt_gid, "gid=%s" },
176 { Opt_file_mode, "file_mode=%s" },
177 { Opt_dirmode, "dirmode=%s" },
178 { Opt_dirmode, "dir_mode=%s" },
179 { Opt_port, "port=%s" },
180 { Opt_rsize, "rsize=%s" },
181 { Opt_wsize, "wsize=%s" },
182 { Opt_actimeo, "actimeo=%s" },
183
4fe9e963
SP		 184 { Opt_blank_user, "user=" },
185 { Opt_blank_user, "username=" },
8830d7e0
SP		 186 { Opt_user, "user=%s" },
187 { Opt_user, "username=%s" },
188 { Opt_blank_pass, "pass=" },
3c15b4cf 189 { Opt_blank_pass, "password=" },
8830d7e0
SP		 190 { Opt_pass, "pass=%s" },
191 { Opt_pass, "password=%s" },
4fe9e963
SP		 192 { Opt_blank_ip, "ip=" },
193 { Opt_blank_ip, "addr=" },
8830d7e0
SP		 194 { Opt_ip, "ip=%s" },
195 { Opt_ip, "addr=%s" },
196 { Opt_unc, "unc=%s" },
197 { Opt_unc, "target=%s" },
198 { Opt_unc, "path=%s" },
199 { Opt_domain, "dom=%s" },
200 { Opt_domain, "domain=%s" },
201 { Opt_domain, "workgroup=%s" },
202 { Opt_srcaddr, "srcaddr=%s" },
203 { Opt_prefixpath, "prefixpath=%s" },
204 { Opt_iocharset, "iocharset=%s" },
8830d7e0
SP		 205 { Opt_netbiosname, "netbiosname=%s" },
206 { Opt_servern, "servern=%s" },
207 { Opt_ver, "ver=%s" },
23db65f5 208 { Opt_vers, "vers=%s" },
8830d7e0 209 { Opt_sec, "sec=%s" },
15b6a473 210 { Opt_cache, "cache=%s" },
8830d7e0
SP		 211
212 { Opt_ignore, "cred" },
213 { Opt_ignore, "credentials" },
a557b976
JL		 214 { Opt_ignore, "cred=%s" },
215 { Opt_ignore, "credentials=%s" },
8830d7e0
SP		 216 { Opt_ignore, "guest" },
217 { Opt_ignore, "rw" },
218 { Opt_ignore, "ro" },
219 { Opt_ignore, "suid" },
220 { Opt_ignore, "nosuid" },
221 { Opt_ignore, "exec" },
222 { Opt_ignore, "noexec" },
223 { Opt_ignore, "nodev" },
224 { Opt_ignore, "noauto" },
225 { Opt_ignore, "dev" },
226 { Opt_ignore, "mand" },
227 { Opt_ignore, "nomand" },
228 { Opt_ignore, "_netdev" },
229
230 { Opt_err, NULL }
231};
232
233enum {
234 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
235 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
7659624f
JL		 236 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
237 Opt_sec_ntlmv2i, Opt_sec_lanman,
8830d7e0
SP		 238 Opt_sec_none,
239
240 Opt_sec_err
241};
242
243static const match_table_t cifs_secflavor_tokens = {
244 { Opt_sec_krb5, "krb5" },
245 { Opt_sec_krb5i, "krb5i" },
246 { Opt_sec_krb5p, "krb5p" },
247 { Opt_sec_ntlmsspi, "ntlmsspi" },
248 { Opt_sec_ntlmssp, "ntlmssp" },
249 { Opt_ntlm, "ntlm" },
250 { Opt_sec_ntlmi, "ntlmi" },
7659624f
JL		 251 { Opt_sec_ntlmv2, "nontlm" },
252 { Opt_sec_ntlmv2, "ntlmv2" },
8830d7e0 253 { Opt_sec_ntlmv2i, "ntlmv2i" },
8830d7e0
SP		 254 { Opt_sec_lanman, "lanman" },
255 { Opt_sec_none, "none" },
256
257 { Opt_sec_err, NULL }
258};
259
15b6a473
JL		 260/* cache flavors */
261enum {
262 Opt_cache_loose,
263 Opt_cache_strict,
264 Opt_cache_none,
265 Opt_cache_err
266};
267
268static const match_table_t cifs_cacheflavor_tokens = {
269 { Opt_cache_loose, "loose" },
270 { Opt_cache_strict, "strict" },
271 { Opt_cache_none, "none" },
272 { Opt_cache_err, NULL }
273};
274
23db65f5
JL		 275static const match_table_t cifs_smb_version_tokens = {
276 { Smb_1, SMB1_VERSION_STRING },
dd446b16 277 { Smb_20, SMB20_VERSION_STRING},
1080ef75 278 { Smb_21, SMB21_VERSION_STRING },
e4aa25e7 279 { Smb_30, SMB30_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
3da46565
EB		 989static int get_option_uid(substring_t args[], kuid_t *result)
990{
991 unsigned long value;
992 kuid_t uid;
993 int rc;
994
995 rc = get_option_ul(args, &value);
996 if (rc)
997 return rc;
998
999 uid = make_kuid(current_user_ns(), value);
1000 if (!uid_valid(uid))
1001 return -EINVAL;
1002
1003 *result = uid;
1004 return 0;
1005}
1006
1007static int get_option_gid(substring_t args[], kgid_t *result)
1008{
1009 unsigned long value;
1010 kgid_t gid;
1011 int rc;
1012
1013 rc = get_option_ul(args, &value);
1014 if (rc)
1015 return rc;
1016
1017 gid = make_kgid(current_user_ns(), value);
1018 if (!gid_valid(gid))
1019 return -EINVAL;
1020
1021 *result = gid;
1022 return 0;
1023}
8830d7e0
SP		 1024
1025static int cifs_parse_security_flavors(char *value,
1026 struct smb_vol *vol)
1027{
1028
1029 substring_t args[MAX_OPT_ARGS];
1030
1031 switch (match_token(value, cifs_secflavor_tokens, args)) {
1032 case Opt_sec_krb5:
0b7bc840 1033 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_SIGN;
8830d7e0
SP		 1034 break;
1035 case Opt_sec_krb5i:
1036 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN;
1037 break;
1038 case Opt_sec_krb5p:
1039 /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */
1040 cERROR(1, "Krb5 cifs privacy not supported");
1041 break;
1042 case Opt_sec_ntlmssp:
1043 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
1044 break;
1045 case Opt_sec_ntlmsspi:
1046 vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN;
1047 break;
1048 case Opt_ntlm:
1049 /* ntlm is default so can be turned off too */
1050 vol->secFlg |= CIFSSEC_MAY_NTLM;
1051 break;
1052 case Opt_sec_ntlmi:
1053 vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN;
1054 break;
7659624f 1055 case Opt_sec_ntlmv2:
8830d7e0
SP		 1056 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1057 break;
1058 case Opt_sec_ntlmv2i:
1059 vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN;
1060 break;
1061#ifdef CONFIG_CIFS_WEAK_PW_HASH
1062 case Opt_sec_lanman:
1063 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1064 break;
1065#endif
1066 case Opt_sec_none:
1067 vol->nullauth = 1;
1068 break;
1069 default:
1070 cERROR(1, "bad security option: %s", value);
1071 return 1;
1072 }
1073
1074 return 0;
1075}
1076
15b6a473
JL		 1077static int
1078cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1079{
1080 substring_t args[MAX_OPT_ARGS];
1081
1082 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1083 case Opt_cache_loose:
1084 vol->direct_io = false;
1085 vol->strict_io = false;
1086 break;
1087 case Opt_cache_strict:
1088 vol->direct_io = false;
1089 vol->strict_io = true;
1090 break;
1091 case Opt_cache_none:
1092 vol->direct_io = true;
1093 vol->strict_io = false;
1094 break;
1095 default:
1096 cERROR(1, "bad cache= option: %s", value);
1097 return 1;
1098 }
1099 return 0;
1100}
1101
23db65f5
JL		 1102static int
1103cifs_parse_smb_version(char *value, struct smb_vol *vol)
1104{
1105 substring_t args[MAX_OPT_ARGS];
1106
1107 switch (match_token(value, cifs_smb_version_tokens, args)) {
1108 case Smb_1:
1109 vol->ops = &smb1_operations;
1110 vol->vals = &smb1_values;
1111 break;
1080ef75 1112#ifdef CONFIG_CIFS_SMB2
dd446b16
SF		 1113 case Smb_20:
1114 vol->ops = &smb21_operations; /* currently identical with 2.1 */
1115 vol->vals = &smb20_values;
1116 break;
1080ef75
SF		 1117 case Smb_21:
1118 vol->ops = &smb21_operations;
1119 vol->vals = &smb21_values;
1120 break;
e4aa25e7 1121 case Smb_30:
38107d45 1122 vol->ops = &smb30_operations;
e4aa25e7
SF		 1123 vol->vals = &smb30_values;
1124 break;
1080ef75 1125#endif
23db65f5
JL		 1126 default:
1127 cERROR(1, "Unknown vers= option specified: %s", value);
1128 return 1;
1129 }
1130 return 0;
1131}
1132
d387a5c5
JL		 1133/*
1134 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1135 * fields with the result. Returns 0 on success and an error otherwise.
1136 */
1137static int
1138cifs_parse_devname(const char *devname, struct smb_vol *vol)
1139{
1140 char *pos;
1141 const char *delims = "/\\";
1142 size_t len;
1143
1144 /* make sure we have a valid UNC double delimiter prefix */
1145 len = strspn(devname, delims);
1146 if (len != 2)
1147 return -EINVAL;
1148
1149 /* find delimiter between host and sharename */
1150 pos = strpbrk(devname + 2, delims);
1151 if (!pos)
1152 return -EINVAL;
1153
1154 /* skip past delimiter */
1155 ++pos;
1156
1157 /* now go until next delimiter or end of string */
1158 len = strcspn(pos, delims);
1159
1160 /* move "pos" up to delimiter or NULL */
1161 pos += len;
1162 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1163 if (!vol->UNC)
1164 return -ENOMEM;
1165
1166 convert_delimiter(vol->UNC, '\\');
1167
1168 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1169 if (!*pos++ || !*pos)
1170 return 0;
1171
1172 vol->prepath = kstrdup(pos, GFP_KERNEL);
1173 if (!vol->prepath)
1174 return -ENOMEM;
1175
1176 return 0;
1177}
1178
1da177e4 1179static int
b946845a 1180cifs_parse_mount_options(const char *mountdata, const char *devname,
50c2f753 1181 struct smb_vol *vol)
1da177e4 1182{
8830d7e0 1183 char *data, *end;
957df453 1184 char *mountdata_copy = NULL, *options;
1da177e4
LT		 1185 unsigned int temp_len, i, j;
1186 char separator[2];
9b9d6b24
JL		 1187 short int override_uid = -1;
1188 short int override_gid = -1;
1189 bool uid_specified = false;
1190 bool gid_specified = false;
d8162558
JL		 1191 bool sloppy = false;
1192 char *invalid = NULL;
88463999 1193 char *nodename = utsname()->nodename;
8830d7e0
SP		 1194 char *string = NULL;
1195 char *tmp_end, *value;
1196 char delim;
b979aaa1
JL		 1197 bool got_ip = false;
1198 unsigned short port = 0;
1199 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1da177e4
LT		 1200
1201 separator[0] = ',';
50c2f753 1202 separator[1] = 0;
8830d7e0 1203 delim = separator[0];
1da177e4 1204
6ee9542a
JL		 1205 /* ensure we always start with zeroed-out smb_vol */
1206 memset(vol, 0, sizeof(*vol));
1207
88463999
JL		 1208 /*
1209 * does not have to be perfect mapping since field is
1210 * informational, only used for servers that do not support
1211 * port 445 and it can be overridden at mount time
1212 */
1397f2ee
JL		 1213 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1214 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
88463999
JL		 1215 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1216
1397f2ee 1217 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
a10faeb2
SF		 1218 /* null target name indicates to use *SMBSERVR default called name
1219 if we end up sending RFC1001 session initialize */
1220 vol->target_rfc1001_name[0] = 0;
3e4b3e1f
JL		 1221 vol->cred_uid = current_uid();
1222 vol->linux_uid = current_uid();
a001e5b5 1223 vol->linux_gid = current_gid();
f55ed1a8
JL		 1224
1225 /* default to only allowing write access to owner of the mount */
1226 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1da177e4
LT		 1227
1228 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
ac67055e
JA		 1229 /* default is always to request posix paths. */
1230 vol->posix_paths = 1;
a0c9217f
JL		 1231 /* default to using server inode numbers where available */
1232 vol->server_ino = 1;
ac67055e 1233
1b359204
JL		 1234 /* default is to use strict cifs caching semantics */
1235 vol->strict_io = true;
1236
6d20e840
SJ		 1237 vol->actimeo = CIFS_DEF_ACTIMEO;
1238
23db65f5
JL		 1239 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1240 vol->ops = &smb1_operations;
1241 vol->vals = &smb1_values;
1242
b946845a
SF		 1243 if (!mountdata)
1244 goto cifs_parse_mount_err;
1245
1246 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1247 if (!mountdata_copy)
1248 goto cifs_parse_mount_err;
1da177e4 1249
b946845a 1250 options = mountdata_copy;
4906e50b 1251 end = options + strlen(options);
8830d7e0 1252
50c2f753 1253 if (strncmp(options, "sep=", 4) == 0) {
fb8c4b14 1254 if (options[4] != 0) {
1da177e4
LT		 1255 separator[0] = options[4];
1256 options += 5;
1257 } else {
b6b38f70 1258 cFYI(1, "Null separator not allowed");
1da177e4
LT		 1259 }
1260 }
3d3ea8e6
SP		 1261 vol->backupuid_specified = false; /* no backup intent for a user */
1262 vol->backupgid_specified = false; /* no backup intent for a group */
50c2f753 1263
d387a5c5
JL		 1264 /*
1265 * For now, we ignore -EINVAL errors under the assumption that the
1266 * unc= and prefixpath= options will be usable.
1267 */
1268 if (cifs_parse_devname(devname, vol) == -ENOMEM) {
1269 printk(KERN_ERR "CIFS: Unable to allocate memory to parse "
1270 "device string.\n");
1271 goto out_nomem;
1272 }
1273
1da177e4 1274 while ((data = strsep(&options, separator)) != NULL) {
8830d7e0
SP		 1275 substring_t args[MAX_OPT_ARGS];
1276 unsigned long option;
1277 int token;
1278
1da177e4
LT		 1279 if (!*data)
1280 continue;
1da177e4 1281
8830d7e0
SP		 1282 token = match_token(data, cifs_mount_option_tokens, args);
1283
1284 switch (token) {
1285
1286 /* Ingnore the following */
1287 case Opt_ignore:
1288 break;
1289
1290 /* Boolean values */
1291 case Opt_user_xattr:
1da177e4 1292 vol->no_xattr = 0;
8830d7e0
SP		 1293 break;
1294 case Opt_nouser_xattr:
1da177e4 1295 vol->no_xattr = 1;
8830d7e0
SP		 1296 break;
1297 case Opt_forceuid:
9b9d6b24 1298 override_uid = 1;
8830d7e0
SP		 1299 break;
1300 case Opt_noforceuid:
9b9d6b24 1301 override_uid = 0;
8830d7e0 1302 break;
72bd481f
JL		 1303 case Opt_forcegid:
1304 override_gid = 1;
1305 break;
1306 case Opt_noforcegid:
1307 override_gid = 0;
1308 break;
8830d7e0 1309 case Opt_noblocksend:
edf1ae40 1310 vol->noblocksnd = 1;
8830d7e0
SP		 1311 break;
1312 case Opt_noautotune:
edf1ae40 1313 vol->noautotune = 1;
8830d7e0
SP		 1314 break;
1315 case Opt_hard:
1da177e4 1316 vol->retry = 1;
8830d7e0
SP		 1317 break;
1318 case Opt_soft:
1da177e4 1319 vol->retry = 0;
8830d7e0
SP		 1320 break;
1321 case Opt_perm:
1da177e4 1322 vol->noperm = 0;
8830d7e0
SP		 1323 break;
1324 case Opt_noperm:
1da177e4 1325 vol->noperm = 1;
8830d7e0
SP		 1326 break;
1327 case Opt_mapchars:
6a0b4824 1328 vol->remap = 1;
8830d7e0
SP		 1329 break;
1330 case Opt_nomapchars:
6a0b4824 1331 vol->remap = 0;
8830d7e0
SP		 1332 break;
1333 case Opt_sfu:
50c2f753 1334 vol->sfu_emul = 1;
8830d7e0
SP		 1335 break;
1336 case Opt_nosfu:
50c2f753 1337 vol->sfu_emul = 0;
8830d7e0
SP		 1338 break;
1339 case Opt_nodfs:
2c1b8615 1340 vol->nodfs = 1;
8830d7e0
SP		 1341 break;
1342 case Opt_posixpaths:
ac67055e 1343 vol->posix_paths = 1;
8830d7e0
SP		 1344 break;
1345 case Opt_noposixpaths:
ac67055e 1346 vol->posix_paths = 0;
8830d7e0
SP		 1347 break;
1348 case Opt_nounix:
c18c842b 1349 vol->no_linux_ext = 1;
8830d7e0
SP		 1350 break;
1351 case Opt_nocase:
50c2f753 1352 vol->nocase = 1;
8830d7e0
SP		 1353 break;
1354 case Opt_brl:
c46fa8ac 1355 vol->nobrl = 0;
8830d7e0
SP		 1356 break;
1357 case Opt_nobrl:
c46fa8ac 1358 vol->nobrl = 1;
5cfdddcf
PS		 1359 /*
1360 * turn off mandatory locking in mode
8830d7e0 1361 * if remote locking is turned off since the
5cfdddcf
PS		 1362 * local vfs will do advisory
1363 */
50c2f753
SF		 1364 if (vol->file_mode ==
1365 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
d3485d37 1366 vol->file_mode = S_IALLUGO;
8830d7e0
SP		 1367 break;
1368 case Opt_forcemandatorylock:
13a6e42a 1369 vol->mand_lock = 1;
8830d7e0
SP		 1370 break;
1371 case Opt_setuids:
1da177e4 1372 vol->setuids = 1;
8830d7e0
SP		 1373 break;
1374 case Opt_nosetuids:
1da177e4 1375 vol->setuids = 0;
8830d7e0
SP		 1376 break;
1377 case Opt_dynperm:
d0a9c078 1378 vol->dynperm = true;
8830d7e0
SP		 1379 break;
1380 case Opt_nodynperm:
d0a9c078 1381 vol->dynperm = false;
8830d7e0
SP		 1382 break;
1383 case Opt_nohard:
1da177e4 1384 vol->retry = 0;
8830d7e0
SP		 1385 break;
1386 case Opt_nosoft:
1da177e4 1387 vol->retry = 1;
8830d7e0
SP		 1388 break;
1389 case Opt_nointr:
1da177e4 1390 vol->intr = 0;
8830d7e0
SP		 1391 break;
1392 case Opt_intr:
1da177e4 1393 vol->intr = 1;
8830d7e0
SP		 1394 break;
1395 case Opt_nostrictsync:
be652445 1396 vol->nostrictsync = 1;
8830d7e0
SP		 1397 break;
1398 case Opt_strictsync:
be652445 1399 vol->nostrictsync = 0;
8830d7e0
SP		 1400 break;
1401 case Opt_serverino:
1da177e4 1402 vol->server_ino = 1;
8830d7e0
SP		 1403 break;
1404 case Opt_noserverino:
1da177e4 1405 vol->server_ino = 0;
8830d7e0
SP		 1406 break;
1407 case Opt_rwpidforward:
d4ffff1f 1408 vol->rwpidforward = 1;
8830d7e0
SP		 1409 break;
1410 case Opt_cifsacl:
0a4b92c0 1411 vol->cifs_acl = 1;
8830d7e0
SP		 1412 break;
1413 case Opt_nocifsacl:
0a4b92c0 1414 vol->cifs_acl = 0;
8830d7e0
SP		 1415 break;
1416 case Opt_acl:
1da177e4 1417 vol->no_psx_acl = 0;
8830d7e0
SP		 1418 break;
1419 case Opt_noacl:
1da177e4 1420 vol->no_psx_acl = 1;
8830d7e0
SP		 1421 break;
1422 case Opt_locallease:
84210e91 1423 vol->local_lease = 1;
8830d7e0
SP		 1424 break;
1425 case Opt_sign:
750d1151 1426 vol->secFlg |= CIFSSEC_MUST_SIGN;
8830d7e0
SP		 1427 break;
1428 case Opt_seal:
95b1cb90 1429 /* we do not do the following in secFlags because seal
8830d7e0
SP		 1430 * is a per tree connection (mount) not a per socket
1431 * or per-smb connection option in the protocol
1432 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1433 */
95b1cb90 1434 vol->seal = 1;
8830d7e0 1435 break;
8830d7e0 1436 case Opt_noac:
50c2f753
SF		 1437 printk(KERN_WARNING "CIFS: Mount option noac not "
1438 "supported. Instead set "
1439 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
8830d7e0
SP		 1440 break;
1441 case Opt_fsc:
607a569d 1442#ifndef CONFIG_CIFS_FSCACHE
83fb086e 1443 cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE "
607a569d 1444 "kernel config option set");
b946845a 1445 goto cifs_parse_mount_err;
607a569d 1446#endif
fa1df75d 1447 vol->fsc = true;
8830d7e0
SP		 1448 break;
1449 case Opt_mfsymlinks:
736a3320 1450 vol->mfsymlinks = true;
8830d7e0
SP		 1451 break;
1452 case Opt_multiuser:
0eb8a132 1453 vol->multiuser = true;
8830d7e0 1454 break;
d8162558
JL		 1455 case Opt_sloppy:
1456 sloppy = true;
1457 break;
8830d7e0
SP		 1458
1459 /* Numeric Values */
1460 case Opt_backupuid:
3da46565 1461 if (get_option_uid(args, &vol->backupuid)) {
3d3ea8e6
SP		 1462 cERROR(1, "%s: Invalid backupuid value",
1463 __func__);
1464 goto cifs_parse_mount_err;
1465 }
1466 vol->backupuid_specified = true;
8830d7e0
SP		 1467 break;
1468 case Opt_backupgid:
3da46565 1469 if (get_option_gid(args, &vol->backupgid)) {
3d3ea8e6
SP		 1470 cERROR(1, "%s: Invalid backupgid value",
1471 __func__);
1472 goto cifs_parse_mount_err;
1473 }
1474 vol->backupgid_specified = true;
8830d7e0
SP		 1475 break;
1476 case Opt_uid:
3da46565 1477 if (get_option_uid(args, &vol->linux_uid)) {
8830d7e0
SP		 1478 cERROR(1, "%s: Invalid uid value",
1479 __func__);
1480 goto cifs_parse_mount_err;
1481 }
8830d7e0
SP		 1482 uid_specified = true;
1483 break;
1484 case Opt_cruid:
3da46565 1485 if (get_option_uid(args, &vol->cred_uid)) {
8830d7e0
SP		 1486 cERROR(1, "%s: Invalid cruid value",
1487 __func__);
1488 goto cifs_parse_mount_err;
1489 }
8830d7e0
SP		 1490 break;
1491 case Opt_gid:
3da46565 1492 if (get_option_gid(args, &vol->linux_gid)) {
8830d7e0
SP		 1493 cERROR(1, "%s: Invalid gid value",
1494 __func__);
1495 goto cifs_parse_mount_err;
1496 }
8830d7e0
SP		 1497 gid_specified = true;
1498 break;
1499 case Opt_file_mode:
1500 if (get_option_ul(args, &option)) {
1501 cERROR(1, "%s: Invalid file_mode value",
1502 __func__);
1503 goto cifs_parse_mount_err;
1504 }
1505 vol->file_mode = option;
1506 break;
1507 case Opt_dirmode:
1508 if (get_option_ul(args, &option)) {
1509 cERROR(1, "%s: Invalid dir_mode value",
1510 __func__);
1511 goto cifs_parse_mount_err;
1512 }
1513 vol->dir_mode = option;
1514 break;
1515 case Opt_port:
b979aaa1
JL		 1516 if (get_option_ul(args, &option) ||
1517 option > USHRT_MAX) {
1518 cERROR(1, "%s: Invalid port value", __func__);
8830d7e0
SP		 1519 goto cifs_parse_mount_err;
1520 }
b979aaa1 1521 port = (unsigned short)option;
8830d7e0
SP		 1522 break;
1523 case Opt_rsize:
1524 if (get_option_ul(args, &option)) {
1525 cERROR(1, "%s: Invalid rsize value",
1526 __func__);
b946845a 1527 goto cifs_parse_mount_err;
8830d7e0
SP		 1528 }
1529 vol->rsize = option;
1530 break;
1531 case Opt_wsize:
1532 if (get_option_ul(args, &option)) {
1533 cERROR(1, "%s: Invalid wsize value",
1534 __func__);
1535 goto cifs_parse_mount_err;
1536 }
1537 vol->wsize = option;
1538 break;
1539 case Opt_actimeo:
1540 if (get_option_ul(args, &option)) {
1541 cERROR(1, "%s: Invalid actimeo value",
1542 __func__);
1543 goto cifs_parse_mount_err;
1544 }
1545 vol->actimeo = HZ * option;
1546 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
1547 cERROR(1, "CIFS: attribute cache"
1548 "timeout too large");
1549 goto cifs_parse_mount_err;
1550 }
1551 break;
1552
1553 /* String Arguments */
1554
4fe9e963
SP		 1555 case Opt_blank_user:
1556 /* null user, ie. anonymous authentication */
1557 vol->nullauth = 1;
1558 vol->username = NULL;
1559 break;
8830d7e0
SP		 1560 case Opt_user:
1561 string = match_strdup(args);
1562 if (string == NULL)
1563 goto out_nomem;
1564
4fe9e963 1565 if (strnlen(string, MAX_USERNAME_SIZE) >
8830d7e0
SP		 1566 MAX_USERNAME_SIZE) {
1567 printk(KERN_WARNING "CIFS: username too long\n");
1568 goto cifs_parse_mount_err;
1569 }
1570 vol->username = kstrdup(string, GFP_KERNEL);
1571 if (!vol->username) {
1572 printk(KERN_WARNING "CIFS: no memory "
1573 "for username\n");
1574 goto cifs_parse_mount_err;
1575 }
1576 break;
1577 case Opt_blank_pass:
8830d7e0
SP		 1578 /* passwords have to be handled differently
1579 * to allow the character used for deliminator
1580 * to be passed within them
1581 */
1582
c369c9a4
SP		 1583 /*
1584 * Check if this is a case where the password
1585 * starts with a delimiter
1586 */
1587 tmp_end = strchr(data, '=');
1588 tmp_end++;
1589 if (!(tmp_end < end && tmp_end[1] == delim)) {
1590 /* No it is not. Set the password to NULL */
1591 vol->password = NULL;
1592 break;
1593 }
1594 /* Yes it is. Drop down to Opt_pass below.*/
1595 case Opt_pass:
8830d7e0
SP		 1596 /* Obtain the value string */
1597 value = strchr(data, '=');
10238074 1598 value++;
8830d7e0
SP		 1599
1600 /* Set tmp_end to end of the string */
1601 tmp_end = (char *) value + strlen(value);
1602
1603 /* Check if following character is the deliminator
1604 * If yes, we have encountered a double deliminator
1605 * reset the NULL character to the deliminator
1606 */
e73f843a 1607 if (tmp_end < end && tmp_end[1] == delim) {
8830d7e0
SP		 1608 tmp_end[0] = delim;
1609
e73f843a
SJ		 1610 /* Keep iterating until we get to a single
1611 * deliminator OR the end
1612 */
1613 while ((tmp_end = strchr(tmp_end, delim))
1614 != NULL && (tmp_end[1] == delim)) {
1615 tmp_end = (char *) &tmp_end[2];
1616 }
1617
1618 /* Reset var options to point to next element */
1619 if (tmp_end) {
1620 tmp_end[0] = '\0';
1621 options = (char *) &tmp_end[1];
1622 } else
1623 /* Reached the end of the mount option
1624 * string */
1625 options = end;
8830d7e0
SP		 1626 }
1627
8830d7e0
SP		 1628 /* Now build new password string */
1629 temp_len = strlen(value);
1630 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1631 if (vol->password == NULL) {
1632 printk(KERN_WARNING "CIFS: no memory "
1633 "for password\n");
1634 goto cifs_parse_mount_err;
1635 }
1636
1637 for (i = 0, j = 0; i < temp_len; i++, j++) {
1638 vol->password[j] = value[i];
1639 if ((value[i] == delim) &&
1640 value[i+1] == delim)
1641 /* skip the second deliminator */
1642 i++;
1643 }
1644 vol->password[j] = '\0';
1645 break;
4fe9e963 1646 case Opt_blank_ip:
b979aaa1
JL		 1647 /* FIXME: should this be an error instead? */
1648 got_ip = false;
4fe9e963 1649 break;
8830d7e0
SP		 1650 case Opt_ip:
1651 string = match_strdup(args);
1652 if (string == NULL)
1653 goto out_nomem;
1654
b979aaa1
JL		 1655 if (!cifs_convert_address(dstaddr, string,
1656 strlen(string))) {
1657 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1658 string);
8830d7e0
SP		 1659 goto cifs_parse_mount_err;
1660 }
b979aaa1 1661 got_ip = true;
8830d7e0
SP		 1662 break;
1663 case Opt_unc:
d387a5c5 1664 string = vol->UNC;
62a1a439 1665 vol->UNC = match_strdup(args);
8367224b 1666 if (vol->UNC == NULL)
8830d7e0
SP		 1667 goto out_nomem;
1668
62a1a439
JL		 1669 convert_delimiter(vol->UNC, '\\');
1670 if (vol->UNC[0] != '\\' || vol->UNC[1] != '\\') {
d387a5c5 1671 printk(KERN_ERR "CIFS: UNC Path does not "
62a1a439 1672 "begin with // or \\\\\n");
b946845a 1673 goto cifs_parse_mount_err;
1da177e4 1674 }
8830d7e0 1675
d387a5c5
JL		 1676 /* Compare old unc= option to new one */
1677 if (!string || strcmp(string, vol->UNC))
1678 printk(KERN_WARNING "CIFS: the value of the "
1679 "unc= mount option does not match the "
1680 "device string. Using the unc= option "
1681 "for now. In 3.10, that option will "
1682 "be ignored and the contents of the "
1683 "device string will be used "
1684 "instead. (%s != %s)\n", string,
1685 vol->UNC);
8830d7e0
SP		 1686 break;
1687 case Opt_domain:
1688 string = match_strdup(args);
1689 if (string == NULL)
1690 goto out_nomem;
1691
4fe9e963 1692 if (strnlen(string, 256) == 256) {
8830d7e0
SP		 1693 printk(KERN_WARNING "CIFS: domain name too"
1694 " long\n");
1695 goto cifs_parse_mount_err;
1696 }
1697
1698 vol->domainname = kstrdup(string, GFP_KERNEL);
1699 if (!vol->domainname) {
1700 printk(KERN_WARNING "CIFS: no memory "
1701 "for domainname\n");
1702 goto cifs_parse_mount_err;
1703 }
1704 cFYI(1, "Domain name set");
1705 break;
1706 case Opt_srcaddr:
1707 string = match_strdup(args);
1708 if (string == NULL)
1709 goto out_nomem;
1710
4fe9e963 1711 if (!cifs_convert_address(
8830d7e0
SP		 1712 (struct sockaddr *)&vol->srcaddr,
1713 string, strlen(string))) {
1714 printk(KERN_WARNING "CIFS: Could not parse"
1715 " srcaddr: %s\n", string);
1716 goto cifs_parse_mount_err;
1717 }
1718 break;
1719 case Opt_prefixpath:
839db3d1
JL		 1720 /* skip over any leading delimiter */
1721 if (*args[0].from == '/' || *args[0].from == '\\')
1722 args[0].from++;
8830d7e0 1723
d387a5c5 1724 string = vol->prepath;
839db3d1 1725 vol->prepath = match_strdup(args);
8367224b 1726 if (vol->prepath == NULL)
839db3d1 1727 goto out_nomem;
d387a5c5
JL		 1728 /* Compare old prefixpath= option to new one */
1729 if (!string || strcmp(string, vol->prepath))
1730 printk(KERN_WARNING "CIFS: the value of the "
1731 "prefixpath= mount option does not "
1732 "match the device string. Using the "
1733 "prefixpath= option for now. In 3.10, "
1734 "that option will be ignored and the "
1735 "contents of the device string will be "
1736 "used instead.(%s != %s)\n", string,
1737 vol->prepath);
8830d7e0
SP		 1738 break;
1739 case Opt_iocharset:
1740 string = match_strdup(args);
1741 if (string == NULL)
1742 goto out_nomem;
1743
4fe9e963 1744 if (strnlen(string, 1024) >= 65) {
8830d7e0
SP		 1745 printk(KERN_WARNING "CIFS: iocharset name "
1746 "too long.\n");
1747 goto cifs_parse_mount_err;
1748 }
1749
1750 if (strnicmp(string, "default", 7) != 0) {
1751 vol->iocharset = kstrdup(string,
1752 GFP_KERNEL);
1753 if (!vol->iocharset) {
1754 printk(KERN_WARNING "CIFS: no memory"
1755 "for charset\n");
1756 goto cifs_parse_mount_err;
1757 }
1758 }
1759 /* if iocharset not set then load_nls_default
1760 * is used by caller
1761 */
1762 cFYI(1, "iocharset set to %s", string);
1763 break;
8830d7e0
SP		 1764 case Opt_netbiosname:
1765 string = match_strdup(args);
1766 if (string == NULL)
1767 goto out_nomem;
1768
8830d7e0
SP		 1769 memset(vol->source_rfc1001_name, 0x20,
1770 RFC1001_NAME_LEN);
1771 /*
1772 * FIXME: are there cases in which a comma can
1773 * be valid in workstation netbios name (and
1774 * need special handling)?
1775 */
1776 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1777 /* don't ucase netbiosname for user */
1778 if (string[i] == 0)
1779 break;
1780 vol->source_rfc1001_name[i] = string[i];
1781 }
1782 /* The string has 16th byte zero still from
1783 * set at top of the function
1784 */
1785 if (i == RFC1001_NAME_LEN && string[i] != 0)
1786 printk(KERN_WARNING "CIFS: netbiosname"
1787 " longer than 15 truncated.\n");
1788
1789 break;
1790 case Opt_servern:
1791 /* servernetbiosname specified override *SMBSERVER */
1792 string = match_strdup(args);
1793 if (string == NULL)
1794 goto out_nomem;
1795
8830d7e0
SP		 1796 /* last byte, type, is 0x20 for servr type */
1797 memset(vol->target_rfc1001_name, 0x20,
1798 RFC1001_NAME_LEN_WITH_NULL);
1799
1800 /* BB are there cases in which a comma can be
1801 valid in this workstation netbios name
1802 (and need special handling)? */
1803
1804 /* user or mount helper must uppercase the
1805 netbios name */
1806 for (i = 0; i < 15; i++) {
1807 if (string[i] == 0)
1808 break;
1809 vol->target_rfc1001_name[i] = string[i];
1810 }
1811 /* The string has 16th byte zero still from
1812 set at top of the function */
1813 if (i == RFC1001_NAME_LEN && string[i] != 0)
1814 printk(KERN_WARNING "CIFS: server net"
1815 "biosname longer than 15 truncated.\n");
1816 break;
1817 case Opt_ver:
1818 string = match_strdup(args);
1819 if (string == NULL)
1820 goto out_nomem;
1821
5249af32 1822 if (strnicmp(string, "1", 1) == 0) {
8830d7e0
SP		 1823 /* This is the default */
1824 break;
1825 }
1826 /* For all other value, error */
1827 printk(KERN_WARNING "CIFS: Invalid version"
1828 " specified\n");
b946845a 1829 goto cifs_parse_mount_err;
23db65f5
JL		 1830 case Opt_vers:
1831 string = match_strdup(args);
1832 if (string == NULL)
1833 goto out_nomem;
1834
1835 if (cifs_parse_smb_version(string, vol) != 0)
1836 goto cifs_parse_mount_err;
1837 break;
8830d7e0
SP		 1838 case Opt_sec:
1839 string = match_strdup(args);
1840 if (string == NULL)
1841 goto out_nomem;
1842
8830d7e0
SP		 1843 if (cifs_parse_security_flavors(string, vol) != 0)
1844 goto cifs_parse_mount_err;
1845 break;
15b6a473
JL		 1846 case Opt_cache:
1847 string = match_strdup(args);
1848 if (string == NULL)
1849 goto out_nomem;
1850
1851 if (cifs_parse_cache_flavor(string, vol) != 0)
1852 goto cifs_parse_mount_err;
1853 break;
8830d7e0 1854 default:
d8162558
JL		 1855 /*
1856 * An option we don't recognize. Save it off for later
1857 * if we haven't already found one
1858 */
1859 if (!invalid)
1860 invalid = data;
8830d7e0 1861 break;
1da177e4 1862 }
8830d7e0
SP		 1863 /* Free up any allocated string */
1864 kfree(string);
1865 string = NULL;
1da177e4 1866 }
0eb8a132 1867
d8162558
JL		 1868 if (!sloppy && invalid) {
1869 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1870 goto cifs_parse_mount_err;
1871 }
1872
8a8798a5
JL		 1873#ifndef CONFIG_KEYS
1874 /* Muliuser mounts require CONFIG_KEYS support */
1875 if (vol->multiuser) {
1876 cERROR(1, "Multiuser mounts require kernels with "
1877 "CONFIG_KEYS enabled.");
b946845a 1878 goto cifs_parse_mount_err;
0eb8a132 1879 }
8a8798a5 1880#endif
e5e69abd 1881 if (!vol->UNC) {
d387a5c5
JL		 1882 cERROR(1, "CIFS mount error: No usable UNC path provided in "
1883 "device string or in unc= option!");
e5e69abd
JL		 1884 goto cifs_parse_mount_err;
1885 }
0eb8a132 1886
62a1a439
JL		 1887 /* make sure UNC has a share name */
1888 if (!strchr(vol->UNC + 3, '\\')) {
1889 cERROR(1, "Malformed UNC. Unable to find share name.");
1890 goto cifs_parse_mount_err;
1891 }
1892
b979aaa1
JL		 1893 if (!got_ip) {
1894 /* No ip= option specified? Try to get it from UNC */
1895 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1896 strlen(&vol->UNC[2]))) {
1897 printk(KERN_ERR "Unable to determine destination "
1898 "address.\n");
1899 goto cifs_parse_mount_err;
1900 }
1901 }
1902
1903 /* set the port that we got earlier */
1904 cifs_set_port(dstaddr, port);
1da177e4 1905
9b9d6b24
JL		 1906 if (uid_specified)
1907 vol->override_uid = override_uid;
1908 else if (override_uid == 1)
1909 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1910 "specified with no uid= option.\n");
1911
1912 if (gid_specified)
1913 vol->override_gid = override_gid;
1914 else if (override_gid == 1)
1915 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1916 "specified with no gid= option.\n");
1917
b946845a 1918 kfree(mountdata_copy);
1da177e4 1919 return 0;
b946845a 1920
8830d7e0
SP		 1921out_nomem:
1922 printk(KERN_WARNING "Could not allocate temporary buffer\n");
b946845a 1923cifs_parse_mount_err:
8830d7e0 1924 kfree(string);
b946845a
SF		 1925 kfree(mountdata_copy);
1926 return 1;
1da177e4
LT		 1927}
1928
3eb9a889
BG		 1929/** Returns true if srcaddr isn't specified and rhs isn't
1930 * specified, or if srcaddr is specified and
1931 * matches the IP address of the rhs argument.
1932 */
1933static bool
1934srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1935{
1936 switch (srcaddr->sa_family) {
1937 case AF_UNSPEC:
1938 return (rhs->sa_family == AF_UNSPEC);
1939 case AF_INET: {
1940 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1941 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1942 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1943 }
1944 case AF_INET6: {
1945 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
e3e2775c 1946 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
3eb9a889
BG		 1947 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1948 }
1949 default:
1950 WARN_ON(1);
1951 return false; /* don't expect to be here */
1952 }
1953}
1954
4b886136
PS		 1955/*
1956 * If no port is specified in addr structure, we try to match with 445 port
1957 * and if it fails - with 139 ports. It should be called only if address
1958 * families of server and addr are equal.
1959 */
1960static bool
1961match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1962{
6da97910 1963 __be16 port, *sport;
4b886136
PS		 1964
1965 switch (addr->sa_family) {
1966 case AF_INET:
1967 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1968 port = ((struct sockaddr_in *) addr)->sin_port;
1969 break;
1970 case AF_INET6:
1971 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1972 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1973 break;
1974 default:
1975 WARN_ON(1);
1976 return false;
1977 }
1978
1979 if (!port) {
1980 port = htons(CIFS_PORT);
1981 if (port == *sport)
1982 return true;
1983
1984 port = htons(RFC1001_PORT);
1985 }
1986
1987 return port == *sport;
1988}
3eb9a889 1989
4515148e 1990static bool
3eb9a889
BG		 1991match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1992 struct sockaddr *srcaddr)
4515148e 1993{
4515148e 1994 switch (addr->sa_family) {
a9f1b85e
PS		 1995 case AF_INET: {
1996 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1997 struct sockaddr_in *srv_addr4 =
1998 (struct sockaddr_in *)&server->dstaddr;
1999
2000 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
4515148e 2001 return false;
4515148e 2002 break;
a9f1b85e
PS		 2003 }
2004 case AF_INET6: {
2005 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
2006 struct sockaddr_in6 *srv_addr6 =
2007 (struct sockaddr_in6 *)&server->dstaddr;
2008
4515148e 2009 if (!ipv6_addr_equal(&addr6->sin6_addr,
a9f1b85e 2010 &srv_addr6->sin6_addr))
4515148e 2011 return false;
a9f1b85e 2012 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
4515148e 2013 return false;
4515148e
JL		 2014 break;
2015 }
a9f1b85e
PS		 2016 default:
2017 WARN_ON(1);
2018 return false; /* don't expect to be here */
2019 }
4515148e 2020
3eb9a889
BG		 2021 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
2022 return false;
2023
4515148e
JL		 2024 return true;
2025}
2026
daf5b0b6
JL		 2027static bool
2028match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
2029{
2030 unsigned int secFlags;
2031
2032 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
2033 secFlags = vol->secFlg;
2034 else
2035 secFlags = global_secflags | vol->secFlg;
2036
2037 switch (server->secType) {
2038 case LANMAN:
2039 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
2040 return false;
2041 break;
2042 case NTLMv2:
2043 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
2044 return false;
2045 break;
2046 case NTLM:
2047 if (!(secFlags & CIFSSEC_MAY_NTLM))
2048 return false;
2049 break;
2050 case Kerberos:
2051 if (!(secFlags & CIFSSEC_MAY_KRB5))
2052 return false;
2053 break;
2054 case RawNTLMSSP:
2055 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
2056 return false;
2057 break;
2058 default:
2059 /* shouldn't happen */
2060 return false;
2061 }
2062
25985edc 2063 /* now check if signing mode is acceptable */
daf5b0b6 2064 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
96daf2b0 2065 (server->sec_mode & SECMODE_SIGN_REQUIRED))
daf5b0b6
JL		 2066 return false;
2067 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
96daf2b0 2068 (server->sec_mode &
daf5b0b6
JL		 2069 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
2070 return false;
2071
2072 return true;
2073}
2074
9fa114f7 2075static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
37bb04e5 2076{
9fa114f7
JL		 2077 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2078
23db65f5
JL		 2079 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2080 return 0;
2081
37bb04e5
PS		 2082 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2083 return 0;
2084
2085 if (!match_address(server, addr,
2086 (struct sockaddr *)&vol->srcaddr))
2087 return 0;
2088
2089 if (!match_port(server, addr))
2090 return 0;
2091
2092 if (!match_security(server, vol))
2093 return 0;
2094
2095 return 1;
2096}
2097
e7ddee90 2098static struct TCP_Server_Info *
9fa114f7 2099cifs_find_tcp_session(struct smb_vol *vol)
1da177e4 2100{
e7ddee90 2101 struct TCP_Server_Info *server;
e7ddee90 2102
3f9bcca7 2103 spin_lock(&cifs_tcp_ses_lock);
4515148e 2104 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
9fa114f7 2105 if (!match_server(server, vol))
daf5b0b6
JL		 2106 continue;
2107
e7ddee90 2108 ++server->srv_count;
3f9bcca7 2109 spin_unlock(&cifs_tcp_ses_lock);
b6b38f70 2110 cFYI(1, "Existing tcp session with server found");
e7ddee90 2111 return server;
1da177e4 2112 }
3f9bcca7 2113 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2114 return NULL;
2115}
1b20d672 2116
14fbf50d 2117static void
e7ddee90 2118cifs_put_tcp_session(struct TCP_Server_Info *server)
1da177e4 2119{
e7ddee90 2120 struct task_struct *task;
1b20d672 2121
3f9bcca7 2122 spin_lock(&cifs_tcp_ses_lock);
e7ddee90 2123 if (--server->srv_count > 0) {
3f9bcca7 2124 spin_unlock(&cifs_tcp_ses_lock);
e7ddee90 2125 return;
1da177e4 2126 }
1b20d672 2127
f1d0c998
RL		 2128 put_net(cifs_net_ns(server));
2129
e7ddee90 2130 list_del_init(&server->tcp_ses_list);
3f9bcca7 2131 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2132
c74093b6
JL		 2133 cancel_delayed_work_sync(&server->echo);
2134
e7ddee90
JL		 2135 spin_lock(&GlobalMid_Lock);
2136 server->tcpStatus = CifsExiting;
2137 spin_unlock(&GlobalMid_Lock);
dea570e0 2138
d2b91521 2139 cifs_crypto_shash_release(server);
488f1d2d
SJ		 2140 cifs_fscache_release_client_cookie(server);
2141
21e73393
SP		 2142 kfree(server->session_key.response);
2143 server->session_key.response = NULL;
2144 server->session_key.len = 0;
2145
e7ddee90
JL		 2146 task = xchg(&server->tsk, NULL);
2147 if (task)
2148 force_sig(SIGKILL, task);
1da177e4
LT		 2149}
2150
63c038c2
JL		 2151static struct TCP_Server_Info *
2152cifs_get_tcp_session(struct smb_vol *volume_info)
2153{
2154 struct TCP_Server_Info *tcp_ses = NULL;
63c038c2
JL		 2155 int rc;
2156
b979aaa1 2157 cFYI(1, "UNC: %s", volume_info->UNC);
63c038c2
JL		 2158
2159 /* see if we already have a matching tcp_ses */
9fa114f7 2160 tcp_ses = cifs_find_tcp_session(volume_info);
63c038c2
JL		 2161 if (tcp_ses)
2162 return tcp_ses;
2163
2164 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2165 if (!tcp_ses) {
2166 rc = -ENOMEM;
2167 goto out_err;
2168 }
2169
d2b91521
SP		 2170 rc = cifs_crypto_shash_allocate(tcp_ses);
2171 if (rc) {
2172 cERROR(1, "could not setup hash structures rc %d", rc);
2173 goto out_err;
2174 }
2175
23db65f5
JL		 2176 tcp_ses->ops = volume_info->ops;
2177 tcp_ses->vals = volume_info->vals;
f1d0c998 2178 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
63c038c2
JL		 2179 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2180 if (IS_ERR(tcp_ses->hostname)) {
2181 rc = PTR_ERR(tcp_ses->hostname);
f7c5445a 2182 goto out_err_crypto_release;
63c038c2
JL		 2183 }
2184
2185 tcp_ses->noblocksnd = volume_info->noblocksnd;
2186 tcp_ses->noautotune = volume_info->noautotune;
6a5fa236 2187 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
fc40f9cf 2188 tcp_ses->in_flight = 0;
2d86dbc9 2189 tcp_ses->credits = 1;
63c038c2
JL		 2190 init_waitqueue_head(&tcp_ses->response_q);
2191 init_waitqueue_head(&tcp_ses->request_q);
2192 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2193 mutex_init(&tcp_ses->srv_mutex);
2194 memcpy(tcp_ses->workstation_RFC1001_name,
2195 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2196 memcpy(tcp_ses->server_RFC1001_name,
2197 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
5d0d2882 2198 tcp_ses->session_estab = false;
63c038c2 2199 tcp_ses->sequence_number = 0;
fda35943 2200 tcp_ses->lstrp = jiffies;
58fa015f 2201 spin_lock_init(&tcp_ses->req_lock);
63c038c2
JL		 2202 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2203 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
c74093b6 2204 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
9fa114f7
JL		 2205 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2206 sizeof(tcp_ses->srcaddr));
2207 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2208 sizeof(tcp_ses->dstaddr));
63c038c2
JL		 2209 /*
2210 * at this point we are the only ones with the pointer
2211 * to the struct since the kernel thread not created yet
2212 * no need to spinlock this init of tcpStatus or srv_count
2213 */
2214 tcp_ses->tcpStatus = CifsNew;
2215 ++tcp_ses->srv_count;
2216
a9f1b85e 2217 rc = ip_connect(tcp_ses);
63c038c2 2218 if (rc < 0) {
b6b38f70 2219 cERROR(1, "Error connecting to socket. Aborting operation");
f7c5445a 2220 goto out_err_crypto_release;
63c038c2
JL		 2221 }
2222
2223 /*
2224 * since we're in a cifs function already, we know that
2225 * this will succeed. No need for try_module_get().
2226 */
2227 __module_get(THIS_MODULE);
7c97c200 2228 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
63c038c2
JL		 2229 tcp_ses, "cifsd");
2230 if (IS_ERR(tcp_ses->tsk)) {
2231 rc = PTR_ERR(tcp_ses->tsk);
b6b38f70 2232 cERROR(1, "error %d create cifsd thread", rc);
63c038c2 2233 module_put(THIS_MODULE);
f7c5445a 2234 goto out_err_crypto_release;
63c038c2 2235 }
fd88ce93 2236 tcp_ses->tcpStatus = CifsNeedNegotiate;
63c038c2
JL		 2237
2238 /* thread spawned, put it on the list */
3f9bcca7 2239 spin_lock(&cifs_tcp_ses_lock);
63c038c2 2240 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
3f9bcca7 2241 spin_unlock(&cifs_tcp_ses_lock);
63c038c2 2242
488f1d2d
SJ		 2243 cifs_fscache_get_client_cookie(tcp_ses);
2244
c74093b6 2245 /* queue echo request delayed work */
da472fc8 2246 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
c74093b6 2247
63c038c2
JL		 2248 return tcp_ses;
2249
f7c5445a 2250out_err_crypto_release:
d2b91521
SP		 2251 cifs_crypto_shash_release(tcp_ses);
2252
f1d0c998
RL		 2253 put_net(cifs_net_ns(tcp_ses));
2254
63c038c2
JL		 2255out_err:
2256 if (tcp_ses) {
8347a5cd
SF		 2257 if (!IS_ERR(tcp_ses->hostname))
2258 kfree(tcp_ses->hostname);
63c038c2
JL		 2259 if (tcp_ses->ssocket)
2260 sock_release(tcp_ses->ssocket);
2261 kfree(tcp_ses);
2262 }
2263 return ERR_PTR(rc);
2264}
2265
96daf2b0 2266static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
37bb04e5
PS		 2267{
2268 switch (ses->server->secType) {
2269 case Kerberos:
64ed39dd 2270 if (!uid_eq(vol->cred_uid, ses->cred_uid))
37bb04e5
PS		 2271 return 0;
2272 break;
2273 default:
04febabc
JL		 2274 /* NULL username means anonymous session */
2275 if (ses->user_name == NULL) {
2276 if (!vol->nullauth)
2277 return 0;
2278 break;
2279 }
2280
37bb04e5 2281 /* anything else takes username/password */
04febabc
JL		 2282 if (strncmp(ses->user_name,
2283 vol->username ? vol->username : "",
37bb04e5
PS		 2284 MAX_USERNAME_SIZE))
2285 return 0;
2286 if (strlen(vol->username) != 0 &&
2287 ses->password != NULL &&
2288 strncmp(ses->password,
2289 vol->password ? vol->password : "",
2290 MAX_PASSWORD_SIZE))
2291 return 0;
2292 }
2293 return 1;
2294}
2295
96daf2b0 2296static struct cifs_ses *
4ff67b72 2297cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1da177e4 2298{
96daf2b0 2299 struct cifs_ses *ses;
dea570e0 2300
3f9bcca7 2301 spin_lock(&cifs_tcp_ses_lock);
4ff67b72 2302 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
37bb04e5
PS		 2303 if (!match_session(ses, vol))
2304 continue;
14fbf50d 2305 ++ses->ses_count;
3f9bcca7 2306 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2307 return ses;
2308 }
3f9bcca7 2309 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2310 return NULL;
2311}
dea570e0 2312
14fbf50d 2313static void
96daf2b0 2314cifs_put_smb_ses(struct cifs_ses *ses)
14fbf50d 2315{
58c45c58 2316 unsigned int xid;
14fbf50d 2317 struct TCP_Server_Info *server = ses->server;
dea570e0 2318
ac3aa2f8 2319 cFYI(1, "%s: ses_count=%d", __func__, ses->ses_count);
3f9bcca7 2320 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 2321 if (--ses->ses_count > 0) {
3f9bcca7 2322 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2323 return;
2324 }
dea570e0 2325
14fbf50d 2326 list_del_init(&ses->smb_ses_list);
3f9bcca7 2327 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2328
58c45c58 2329 if (ses->status == CifsGood && server->ops->logoff) {
6d5786a3 2330 xid = get_xid();
58c45c58 2331 server->ops->logoff(xid, ses);
6d5786a3 2332 _free_xid(xid);
14fbf50d
JL		 2333 }
2334 sesInfoFree(ses);
2335 cifs_put_tcp_session(server);
2336}
dea570e0 2337
8a8798a5
JL		 2338#ifdef CONFIG_KEYS
2339
2340/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
2341#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
2342
2343/* Populate username and pw fields from keyring if possible */
2344static int
2345cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2346{
2347 int rc = 0;
2348 char *desc, *delim, *payload;
2349 ssize_t len;
2350 struct key *key;
2351 struct TCP_Server_Info *server = ses->server;
2352 struct sockaddr_in *sa;
2353 struct sockaddr_in6 *sa6;
2354 struct user_key_payload *upayload;
2355
2356 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2357 if (!desc)
2358 return -ENOMEM;
2359
2360 /* try to find an address key first */
2361 switch (server->dstaddr.ss_family) {
2362 case AF_INET:
2363 sa = (struct sockaddr_in *)&server->dstaddr;
2364 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2365 break;
2366 case AF_INET6:
2367 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2368 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2369 break;
2370 default:
2371 cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family);
2372 rc = -EINVAL;
2373 goto out_err;
2374 }
2375
2376 cFYI(1, "%s: desc=%s", __func__, desc);
2377 key = request_key(&key_type_logon, desc, "");
2378 if (IS_ERR(key)) {
2379 if (!ses->domainName) {
2380 cFYI(1, "domainName is NULL");
2381 rc = PTR_ERR(key);
2382 goto out_err;
2383 }
2384
2385 /* didn't work, try to find a domain key */
2386 sprintf(desc, "cifs:d:%s", ses->domainName);
2387 cFYI(1, "%s: desc=%s", __func__, desc);
2388 key = request_key(&key_type_logon, desc, "");
2389 if (IS_ERR(key)) {
2390 rc = PTR_ERR(key);
2391 goto out_err;
2392 }
2393 }
2394
2395 down_read(&key->sem);
2396 upayload = key->payload.data;
2397 if (IS_ERR_OR_NULL(upayload)) {
4edc53c1 2398 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
8a8798a5
JL		 2399 goto out_key_put;
2400 }
2401
2402 /* find first : in payload */
2403 payload = (char *)upayload->data;
2404 delim = strnchr(payload, upayload->datalen, ':');
2405 cFYI(1, "payload=%s", payload);
2406 if (!delim) {
2407 cFYI(1, "Unable to find ':' in payload (datalen=%d)",
2408 upayload->datalen);
2409 rc = -EINVAL;
2410 goto out_key_put;
2411 }
2412
2413 len = delim - payload;
2414 if (len > MAX_USERNAME_SIZE || len <= 0) {
000f9bb8 2415 cFYI(1, "Bad value from username search (len=%zd)", len);
8a8798a5
JL		 2416 rc = -EINVAL;
2417 goto out_key_put;
2418 }
2419
2420 vol->username = kstrndup(payload, len, GFP_KERNEL);
2421 if (!vol->username) {
000f9bb8 2422 cFYI(1, "Unable to allocate %zd bytes for username", len);
8a8798a5
JL		 2423 rc = -ENOMEM;
2424 goto out_key_put;
2425 }
2426 cFYI(1, "%s: username=%s", __func__, vol->username);
2427
2428 len = key->datalen - (len + 1);
2429 if (len > MAX_PASSWORD_SIZE || len <= 0) {
000f9bb8 2430 cFYI(1, "Bad len for password search (len=%zd)", len);
8a8798a5
JL		 2431 rc = -EINVAL;
2432 kfree(vol->username);
2433 vol->username = NULL;
2434 goto out_key_put;
2435 }
2436
2437 ++delim;
2438 vol->password = kstrndup(delim, len, GFP_KERNEL);
2439 if (!vol->password) {
000f9bb8 2440 cFYI(1, "Unable to allocate %zd bytes for password", len);
8a8798a5
JL		 2441 rc = -ENOMEM;
2442 kfree(vol->username);
2443 vol->username = NULL;
2444 goto out_key_put;
2445 }
2446
2447out_key_put:
2448 up_read(&key->sem);
2449 key_put(key);
2450out_err:
2451 kfree(desc);
2452 cFYI(1, "%s: returning %d", __func__, rc);
2453 return rc;
2454}
2455#else /* ! CONFIG_KEYS */
2456static inline int
2457cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2458 struct cifs_ses *ses __attribute__((unused)))
2459{
2460 return -ENOSYS;
2461}
2462#endif /* CONFIG_KEYS */
2463
96daf2b0 2464static struct cifs_ses *
36988c76
JL		 2465cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2466{
286170aa
PS		 2467 int rc = -ENOMEM;
2468 unsigned int xid;
96daf2b0 2469 struct cifs_ses *ses;
a9f1b85e
PS		 2470 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2471 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
36988c76 2472
6d5786a3 2473 xid = get_xid();
36988c76 2474
4ff67b72 2475 ses = cifs_find_smb_ses(server, volume_info);
36988c76
JL		 2476 if (ses) {
2477 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
2478
36988c76 2479 mutex_lock(&ses->session_mutex);
198b5682
JL		 2480 rc = cifs_negotiate_protocol(xid, ses);
2481 if (rc) {
2482 mutex_unlock(&ses->session_mutex);
2483 /* problem -- put our ses reference */
2484 cifs_put_smb_ses(ses);
6d5786a3 2485 free_xid(xid);
198b5682
JL		 2486 return ERR_PTR(rc);
2487 }
36988c76
JL		 2488 if (ses->need_reconnect) {
2489 cFYI(1, "Session needs reconnect");
2490 rc = cifs_setup_session(xid, ses,
2491 volume_info->local_nls);
2492 if (rc) {
2493 mutex_unlock(&ses->session_mutex);
2494 /* problem -- put our reference */
2495 cifs_put_smb_ses(ses);
6d5786a3 2496 free_xid(xid);
36988c76
JL		 2497 return ERR_PTR(rc);
2498 }
2499 }
2500 mutex_unlock(&ses->session_mutex);
460cf341
JL		 2501
2502 /* existing SMB ses has a server reference already */
2503 cifs_put_tcp_session(server);
6d5786a3 2504 free_xid(xid);
36988c76
JL		 2505 return ses;
2506 }
2507
2508 cFYI(1, "Existing smb sess not found");
2509 ses = sesInfoAlloc();
2510 if (ses == NULL)
2511 goto get_ses_fail;
2512
2513 /* new SMB session uses our server ref */
2514 ses->server = server;
a9f1b85e
PS		 2515 if (server->dstaddr.ss_family == AF_INET6)
2516 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
36988c76 2517 else
a9f1b85e 2518 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
36988c76 2519
8727c8a8
SF		 2520 if (volume_info->username) {
2521 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2522 if (!ses->user_name)
2523 goto get_ses_fail;
2524 }
36988c76
JL		 2525
2526 /* volume_info->password freed at unmount */
2527 if (volume_info->password) {
2528 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2529 if (!ses->password)
2530 goto get_ses_fail;
2531 }
2532 if (volume_info->domainname) {
d3686d54
SP		 2533 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2534 if (!ses->domainName)
2535 goto get_ses_fail;
36988c76 2536 }
3e4b3e1f 2537 ses->cred_uid = volume_info->cred_uid;
36988c76 2538 ses->linux_uid = volume_info->linux_uid;
d9b94201 2539
36988c76
JL		 2540 ses->overrideSecFlg = volume_info->secFlg;
2541
2542 mutex_lock(&ses->session_mutex);
198b5682
JL		 2543 rc = cifs_negotiate_protocol(xid, ses);
2544 if (!rc)
2545 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
36988c76 2546 mutex_unlock(&ses->session_mutex);
c8e56f1f 2547 if (rc)
36988c76
JL		 2548 goto get_ses_fail;
2549
2550 /* success, put it on the list */
3f9bcca7 2551 spin_lock(&cifs_tcp_ses_lock);
36988c76 2552 list_add(&ses->smb_ses_list, &server->smb_ses_list);
3f9bcca7 2553 spin_unlock(&cifs_tcp_ses_lock);
36988c76 2554
6d5786a3 2555 free_xid(xid);
36988c76
JL		 2556 return ses;
2557
2558get_ses_fail:
2559 sesInfoFree(ses);
6d5786a3 2560 free_xid(xid);
36988c76
JL		 2561 return ERR_PTR(rc);
2562}
2563
96daf2b0 2564static int match_tcon(struct cifs_tcon *tcon, const char *unc)
37bb04e5
PS		 2565{
2566 if (tcon->tidStatus == CifsExiting)
2567 return 0;
2568 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2569 return 0;
2570 return 1;
2571}
2572
96daf2b0
SF		 2573static struct cifs_tcon *
2574cifs_find_tcon(struct cifs_ses *ses, const char *unc)
f1987b44
JL		 2575{
2576 struct list_head *tmp;
96daf2b0 2577 struct cifs_tcon *tcon;
f1987b44 2578
3f9bcca7 2579 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2580 list_for_each(tmp, &ses->tcon_list) {
96daf2b0 2581 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
37bb04e5 2582 if (!match_tcon(tcon, unc))
f1987b44 2583 continue;
f1987b44 2584 ++tcon->tc_count;
3f9bcca7 2585 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2586 return tcon;
1da177e4 2587 }
3f9bcca7 2588 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2589 return NULL;
2590}
2591
f1987b44 2592static void
96daf2b0 2593cifs_put_tcon(struct cifs_tcon *tcon)
f1987b44 2594{
2e6e02ab 2595 unsigned int xid;
96daf2b0 2596 struct cifs_ses *ses = tcon->ses;
f1987b44 2597
ac3aa2f8 2598 cFYI(1, "%s: tc_count=%d", __func__, tcon->tc_count);
3f9bcca7 2599 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2600 if (--tcon->tc_count > 0) {
3f9bcca7 2601 spin_unlock(&cifs_tcp_ses_lock);
f1987b44
JL		 2602 return;
2603 }
2604
2605 list_del_init(&tcon->tcon_list);
3f9bcca7 2606 spin_unlock(&cifs_tcp_ses_lock);
f1987b44 2607
6d5786a3 2608 xid = get_xid();
2e6e02ab
PS		 2609 if (ses->server->ops->tree_disconnect)
2610 ses->server->ops->tree_disconnect(xid, tcon);
6d5786a3 2611 _free_xid(xid);
f1987b44 2612
d03382ce 2613 cifs_fscache_release_super_cookie(tcon);
9f841593 2614 tconInfoFree(tcon);
f1987b44
JL		 2615 cifs_put_smb_ses(ses);
2616}
2617
96daf2b0
SF		 2618static struct cifs_tcon *
2619cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
d00c28de
JL		 2620{
2621 int rc, xid;
96daf2b0 2622 struct cifs_tcon *tcon;
d00c28de
JL		 2623
2624 tcon = cifs_find_tcon(ses, volume_info->UNC);
2625 if (tcon) {
2626 cFYI(1, "Found match on UNC path");
2627 /* existing tcon already has a reference */
2628 cifs_put_smb_ses(ses);
2629 if (tcon->seal != volume_info->seal)
2630 cERROR(1, "transport encryption setting "
2631 "conflicts with existing tid");
2632 return tcon;
2633 }
2634
2e6e02ab
PS		 2635 if (!ses->server->ops->tree_connect) {
2636 rc = -ENOSYS;
2637 goto out_fail;
2638 }
2639
d00c28de
JL		 2640 tcon = tconInfoAlloc();
2641 if (tcon == NULL) {
2642 rc = -ENOMEM;
2643 goto out_fail;
2644 }
2645
2646 tcon->ses = ses;
2647 if (volume_info->password) {
2648 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2649 if (!tcon->password) {
2650 rc = -ENOMEM;
2651 goto out_fail;
2652 }
2653 }
2654
2e6e02ab
PS		 2655 /*
2656 * BB Do we need to wrap session_mutex around this TCon call and Unix
2657 * SetFS as we do on SessSetup and reconnect?
2658 */
6d5786a3 2659 xid = get_xid();
2e6e02ab
PS		 2660 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2661 volume_info->local_nls);
6d5786a3 2662 free_xid(xid);
2e6e02ab 2663 cFYI(1, "Tcon rc = %d", rc);
d00c28de
JL		 2664 if (rc)
2665 goto out_fail;
2666
2667 if (volume_info->nodfs) {
2668 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2669 cFYI(1, "DFS disabled (%d)", tcon->Flags);
2670 }
2671 tcon->seal = volume_info->seal;
2e6e02ab
PS		 2672 /*
2673 * We can have only one retry value for a connection to a share so for
2674 * resources mounted more than once to the same server share the last
2675 * value passed in for the retry flag is used.
2676 */
d00c28de
JL		 2677 tcon->retry = volume_info->retry;
2678 tcon->nocase = volume_info->nocase;
2679 tcon->local_lease = volume_info->local_lease;
233839b1 2680 INIT_LIST_HEAD(&tcon->pending_opens);
d00c28de 2681
3f9bcca7 2682 spin_lock(&cifs_tcp_ses_lock);
d00c28de 2683 list_add(&tcon->tcon_list, &ses->tcon_list);
3f9bcca7 2684 spin_unlock(&cifs_tcp_ses_lock);
d00c28de 2685
d03382ce
SJ		 2686 cifs_fscache_get_super_cookie(tcon);
2687
d00c28de
JL		 2688 return tcon;
2689
2690out_fail:
2691 tconInfoFree(tcon);
2692 return ERR_PTR(rc);
2693}
2694
9d002df4
JL		 2695void
2696cifs_put_tlink(struct tcon_link *tlink)
2697{
2698 if (!tlink || IS_ERR(tlink))
2699 return;
2700
2701 if (!atomic_dec_and_test(&tlink->tl_count) ||
2702 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2703 tlink->tl_time = jiffies;
2704 return;
2705 }
2706
2707 if (!IS_ERR(tlink_tcon(tlink)))
2708 cifs_put_tcon(tlink_tcon(tlink));
2709 kfree(tlink);
2710 return;
2711}
d00c28de 2712
25c7f41e 2713static inline struct tcon_link *
cd51875d
PS		 2714cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2715{
2716 return cifs_sb->master_tlink;
2717}
25c7f41e
PS		 2718
2719static int
2720compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2721{
2722 struct cifs_sb_info *old = CIFS_SB(sb);
2723 struct cifs_sb_info *new = mnt_data->cifs_sb;
2724
2725 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2726 return 0;
2727
2728 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2729 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2730 return 0;
2731
25c7f41e 2732 /*
5eba8ab3
JL		 2733 * We want to share sb only if we don't specify an r/wsize or
2734 * specified r/wsize is greater than or equal to existing one.
25c7f41e
PS		 2735 */
2736 if (new->wsize && new->wsize < old->wsize)
2737 return 0;
2738
5eba8ab3
JL		 2739 if (new->rsize && new->rsize < old->rsize)
2740 return 0;
2741
1f68233c 2742 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
25c7f41e
PS		 2743 return 0;
2744
2745 if (old->mnt_file_mode != new->mnt_file_mode ||
2746 old->mnt_dir_mode != new->mnt_dir_mode)
2747 return 0;
2748
2749 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2750 return 0;
2751
2752 if (old->actimeo != new->actimeo)
2753 return 0;
2754
2755 return 1;
2756}
2757
2758int
2759cifs_match_super(struct super_block *sb, void *data)
2760{
2761 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2762 struct smb_vol *volume_info;
2763 struct cifs_sb_info *cifs_sb;
2764 struct TCP_Server_Info *tcp_srv;
96daf2b0
SF		 2765 struct cifs_ses *ses;
2766 struct cifs_tcon *tcon;
25c7f41e 2767 struct tcon_link *tlink;
25c7f41e
PS		 2768 int rc = 0;
2769
25c7f41e
PS		 2770 spin_lock(&cifs_tcp_ses_lock);
2771 cifs_sb = CIFS_SB(sb);
2772 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2773 if (IS_ERR(tlink)) {
2774 spin_unlock(&cifs_tcp_ses_lock);
2775 return rc;
2776 }
2777 tcon = tlink_tcon(tlink);
2778 ses = tcon->ses;
2779 tcp_srv = ses->server;
2780
2781 volume_info = mnt_data->vol;
2782
9fa114f7 2783 if (!match_server(tcp_srv, volume_info) ||
25c7f41e
PS		 2784 !match_session(ses, volume_info) ||
2785 !match_tcon(tcon, volume_info->UNC)) {
2786 rc = 0;
2787 goto out;
2788 }
2789
2790 rc = compare_mount_options(sb, mnt_data);
2791out:
25c7f41e 2792 spin_unlock(&cifs_tcp_ses_lock);
f484b5d0 2793 cifs_put_tlink(tlink);
25c7f41e
PS		 2794 return rc;
2795}
2796
1da177e4 2797int
b669f33c 2798get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2e6e02ab
PS		 2799 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2800 struct dfs_info3_param **referrals, int remap)
1da177e4
LT		 2801{
2802 char *temp_unc;
2803 int rc = 0;
2804
b669f33c 2805 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2e6e02ab
PS		 2806 return -ENOSYS;
2807
2808 *num_referrals = 0;
2809 *referrals = NULL;
1da177e4 2810
2e6e02ab 2811 if (ses->ipc_tid == 0) {
1da177e4 2812 temp_unc = kmalloc(2 /* for slashes */ +
2e6e02ab
PS		 2813 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2814 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
1da177e4
LT		 2815 if (temp_unc == NULL)
2816 return -ENOMEM;
2817 temp_unc[0] = '\\';
2818 temp_unc[1] = '\\';
2e6e02ab
PS		 2819 strcpy(temp_unc + 2, ses->serverName);
2820 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2821 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2822 nls_codepage);
2823 cFYI(1, "Tcon rc = %d ipc_tid = %d", rc, ses->ipc_tid);
1da177e4
LT		 2824 kfree(temp_unc);
2825 }
2826 if (rc == 0)
b669f33c
PS		 2827 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2828 referrals, num_referrals,
2829 nls_codepage, remap);
2e6e02ab
PS		 2830 /*
2831 * BB - map targetUNCs to dfs_info3 structures, here or in
b669f33c 2832 * ses->server->ops->get_dfs_refer.
2e6e02ab 2833 */
1da177e4
LT		 2834
2835 return rc;
2836}
2837
09e50d55
JL		 2838#ifdef CONFIG_DEBUG_LOCK_ALLOC
2839static struct lock_class_key cifs_key[2];
2840static struct lock_class_key cifs_slock_key[2];
2841
2842static inline void
2843cifs_reclassify_socket4(struct socket *sock)
2844{
2845 struct sock *sk = sock->sk;
2846 BUG_ON(sock_owned_by_user(sk));
2847 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2848 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2849}
2850
2851static inline void
2852cifs_reclassify_socket6(struct socket *sock)
2853{
2854 struct sock *sk = sock->sk;
2855 BUG_ON(sock_owned_by_user(sk));
2856 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2857 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2858}
2859#else
2860static inline void
2861cifs_reclassify_socket4(struct socket *sock)
2862{
2863}
2864
2865static inline void
2866cifs_reclassify_socket6(struct socket *sock)
2867{
2868}
2869#endif
2870
1da177e4 2871/* See RFC1001 section 14 on representation of Netbios names */
50c2f753 2872static void rfc1002mangle(char *target, char *source, unsigned int length)
1da177e4 2873{
50c2f753 2874 unsigned int i, j;
1da177e4 2875
50c2f753 2876 for (i = 0, j = 0; i < (length); i++) {
1da177e4
LT		 2877 /* mask a nibble at a time and encode */
2878 target[j] = 'A' + (0x0F & (source[i] >> 4));
2879 target[j+1] = 'A' + (0x0F & source[i]);
50c2f753 2880 j += 2;
1da177e4
LT		 2881 }
2882
2883}
2884
3eb9a889
BG		 2885static int
2886bind_socket(struct TCP_Server_Info *server)
2887{
2888 int rc = 0;
2889 if (server->srcaddr.ss_family != AF_UNSPEC) {
2890 /* Bind to the specified local IP address */
2891 struct socket *socket = server->ssocket;
2892 rc = socket->ops->bind(socket,
2893 (struct sockaddr *) &server->srcaddr,
2894 sizeof(server->srcaddr));
2895 if (rc < 0) {
2896 struct sockaddr_in *saddr4;
2897 struct sockaddr_in6 *saddr6;
2898 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2899 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2900 if (saddr6->sin6_family == AF_INET6)
2901 cERROR(1, "cifs: "
ac3aa2f8 2902 "Failed to bind to: %pI6c, error: %d",
3eb9a889
BG		 2903 &saddr6->sin6_addr, rc);
2904 else
2905 cERROR(1, "cifs: "
ac3aa2f8 2906 "Failed to bind to: %pI4, error: %d",
3eb9a889
BG		 2907 &saddr4->sin_addr.s_addr, rc);
2908 }
2909 }
2910 return rc;
2911}
1da177e4
LT		 2912
2913static int
a9f1b85e 2914ip_rfc1001_connect(struct TCP_Server_Info *server)
1da177e4
LT		 2915{
2916 int rc = 0;
a9f1b85e
PS		 2917 /*
2918 * some servers require RFC1001 sessinit before sending
2919 * negprot - BB check reconnection in case where second
2920 * sessinit is sent but no second negprot
2921 */
2922 struct rfc1002_session_packet *ses_init_buf;
2923 struct smb_hdr *smb_buf;
2924 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2925 GFP_KERNEL);
2926 if (ses_init_buf) {
2927 ses_init_buf->trailer.session_req.called_len = 32;
2928
2929 if (server->server_RFC1001_name &&
2930 server->server_RFC1001_name[0] != 0)
2931 rfc1002mangle(ses_init_buf->trailer.
2932 session_req.called_name,
2933 server->server_RFC1001_name,
2934 RFC1001_NAME_LEN_WITH_NULL);
2935 else
2936 rfc1002mangle(ses_init_buf->trailer.
2937 session_req.called_name,
2938 DEFAULT_CIFS_CALLED_NAME,
2939 RFC1001_NAME_LEN_WITH_NULL);
2940
2941 ses_init_buf->trailer.session_req.calling_len = 32;
2942
2943 /*
2944 * calling name ends in null (byte 16) from old smb
2945 * convention.
2946 */
2947 if (server->workstation_RFC1001_name &&
2948 server->workstation_RFC1001_name[0] != 0)
2949 rfc1002mangle(ses_init_buf->trailer.
2950 session_req.calling_name,
2951 server->workstation_RFC1001_name,
2952 RFC1001_NAME_LEN_WITH_NULL);
2953 else
2954 rfc1002mangle(ses_init_buf->trailer.
2955 session_req.calling_name,
2956 "LINUX_CIFS_CLNT",
2957 RFC1001_NAME_LEN_WITH_NULL);
2958
2959 ses_init_buf->trailer.session_req.scope1 = 0;
2960 ses_init_buf->trailer.session_req.scope2 = 0;
2961 smb_buf = (struct smb_hdr *)ses_init_buf;
2962
2963 /* sizeof RFC1002_SESSION_REQUEST with no scope */
be8e3b00 2964 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
a9f1b85e
PS		 2965 rc = smb_send(server, smb_buf, 0x44);
2966 kfree(ses_init_buf);
2967 /*
2968 * RFC1001 layer in at least one server
2969 * requires very short break before negprot
2970 * presumably because not expecting negprot
2971 * to follow so fast. This is a simple
2972 * solution that works without
2973 * complicating the code and causes no
2974 * significant slowing down on mount
2975 * for everyone else
2976 */
2977 usleep_range(1000, 2000);
2978 }
2979 /*
2980 * else the negprot may still work without this
2981 * even though malloc failed
2982 */
2983
2984 return rc;
2985}
2986
2987static int
2988generic_ip_connect(struct TCP_Server_Info *server)
2989{
2990 int rc = 0;
6da97910 2991 __be16 sport;
a9f1b85e 2992 int slen, sfamily;
bcf4b106 2993 struct socket *socket = server->ssocket;
a9f1b85e
PS		 2994 struct sockaddr *saddr;
2995
2996 saddr = (struct sockaddr *) &server->dstaddr;
2997
2998 if (server->dstaddr.ss_family == AF_INET6) {
2999 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
3000 slen = sizeof(struct sockaddr_in6);
3001 sfamily = AF_INET6;
3002 } else {
3003 sport = ((struct sockaddr_in *) saddr)->sin_port;
3004 slen = sizeof(struct sockaddr_in);
3005 sfamily = AF_INET;
3006 }
1da177e4 3007
bcf4b106 3008 if (socket == NULL) {
f1d0c998
RL		 3009 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
3010 IPPROTO_TCP, &socket, 1);
1da177e4 3011 if (rc < 0) {
b6b38f70 3012 cERROR(1, "Error %d creating socket", rc);
a9f1b85e 3013 server->ssocket = NULL;
1da177e4 3014 return rc;
1da177e4 3015 }
bcf4b106
JL		 3016
3017 /* BB other socket options to set KEEPALIVE, NODELAY? */
b6b38f70 3018 cFYI(1, "Socket created");
bcf4b106
JL		 3019 server->ssocket = socket;
3020 socket->sk->sk_allocation = GFP_NOFS;
a9f1b85e
PS		 3021 if (sfamily == AF_INET6)
3022 cifs_reclassify_socket6(socket);
3023 else
3024 cifs_reclassify_socket4(socket);
1da177e4
LT		 3025 }
3026
3eb9a889
BG		 3027 rc = bind_socket(server);
3028 if (rc < 0)
3029 return rc;
3030
bcf4b106
JL		 3031 /*
3032 * Eventually check for other socket options to change from
a9f1b85e
PS		 3033 * the default. sock_setsockopt not used because it expects
3034 * user space buffer
bcf4b106
JL		 3035 */
3036 socket->sk->sk_rcvtimeo = 7 * HZ;
da505c38 3037 socket->sk->sk_sndtimeo = 5 * HZ;
edf1ae40 3038
b387eaeb 3039 /* make the bufsizes depend on wsize/rsize and max requests */
bcf4b106
JL		 3040 if (server->noautotune) {
3041 if (socket->sk->sk_sndbuf < (200 * 1024))
3042 socket->sk->sk_sndbuf = 200 * 1024;
3043 if (socket->sk->sk_rcvbuf < (140 * 1024))
3044 socket->sk->sk_rcvbuf = 140 * 1024;
edf1ae40 3045 }
1da177e4 3046
6a5fa236 3047 if (server->tcp_nodelay) {
a9f1b85e 3048 int val = 1;
6a5fa236
SF		 3049 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
3050 (char *)&val, sizeof(val));
3051 if (rc)
b6b38f70 3052 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
6a5fa236
SF		 3053 }
3054
b6b38f70 3055 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
bcf4b106 3056 socket->sk->sk_sndbuf,
b6b38f70 3057 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
bcf4b106 3058
ee1b3ea9
JL		 3059 rc = socket->ops->connect(socket, saddr, slen, 0);
3060 if (rc < 0) {
3061 cFYI(1, "Error %d connecting to server", rc);
3062 sock_release(socket);
3063 server->ssocket = NULL;
3064 return rc;
3065 }
3066
a9f1b85e
PS		 3067 if (sport == htons(RFC1001_PORT))
3068 rc = ip_rfc1001_connect(server);
50c2f753 3069
1da177e4
LT		 3070 return rc;
3071}
3072
3073static int
a9f1b85e 3074ip_connect(struct TCP_Server_Info *server)
1da177e4 3075{
6da97910 3076 __be16 *sport;
a9f1b85e
PS		 3077 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3078 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
1da177e4 3079
a9f1b85e
PS		 3080 if (server->dstaddr.ss_family == AF_INET6)
3081 sport = &addr6->sin6_port;
3082 else
3083 sport = &addr->sin_port;
1da177e4 3084
a9f1b85e
PS		 3085 if (*sport == 0) {
3086 int rc;
1da177e4 3087
a9f1b85e
PS		 3088 /* try with 445 port at first */
3089 *sport = htons(CIFS_PORT);
3eb9a889 3090
a9f1b85e 3091 rc = generic_ip_connect(server);
1da177e4 3092 if (rc >= 0)
a9f1b85e 3093 return rc;
6a5fa236 3094
a9f1b85e
PS		 3095 /* if it failed, try with 139 port */
3096 *sport = htons(RFC1001_PORT);
6a5fa236
SF		 3097 }
3098
a9f1b85e 3099 return generic_ip_connect(server);
1da177e4
LT		 3100}
3101
6d5786a3 3102void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
2c6292ae 3103 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
8af18971
SF		 3104{
3105 /* if we are reconnecting then should we check to see if
3106 * any requested capabilities changed locally e.g. via
3107 * remount but we can not do much about it here
3108 * if they have (even if we could detect it by the following)
3109 * Perhaps we could add a backpointer to array of sb from tcon
3110 * or if we change to make all sb to same share the same
3111 * sb as NFS - then we only have one backpointer to sb.
3112 * What if we wanted to mount the server share twice once with
3113 * and once without posixacls or posix paths? */
3114 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
50c2f753 3115
c18c842b
SF		 3116 if (vol_info && vol_info->no_linux_ext) {
3117 tcon->fsUnixInfo.Capability = 0;
3118 tcon->unix_ext = 0; /* Unix Extensions disabled */
b6b38f70 3119 cFYI(1, "Linux protocol extensions disabled");
c18c842b
SF		 3120 return;
3121 } else if (vol_info)
3122 tcon->unix_ext = 1; /* Unix Extensions supported */
3123
3124 if (tcon->unix_ext == 0) {
b6b38f70 3125 cFYI(1, "Unix extensions disabled so not set on reconnect");
c18c842b
SF		 3126 return;
3127 }
50c2f753 3128
fb8c4b14 3129 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
8af18971 3130 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
6848b733 3131 cFYI(1, "unix caps which server supports %lld", cap);
8af18971
SF		 3132 /* check for reconnect case in which we do not
3133 want to change the mount behavior if we can avoid it */
fb8c4b14 3134 if (vol_info == NULL) {
50c2f753 3135 /* turn off POSIX ACL and PATHNAMES if not set
8af18971
SF		 3136 originally at mount time */
3137 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3138 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
11b6d645
IM		 3139 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3140 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
b6b38f70 3141 cERROR(1, "POSIXPATH support change");
8af18971 3142 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
11b6d645 3143 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
b6b38f70
JP		 3144 cERROR(1, "possible reconnect error");
3145 cERROR(1, "server disabled POSIX path support");
11b6d645 3146 }
8af18971 3147 }
50c2f753 3148
6848b733
SF		 3149 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3150 cERROR(1, "per-share encryption not supported yet");
3151
8af18971 3152 cap &= CIFS_UNIX_CAP_MASK;
75865f8c 3153 if (vol_info && vol_info->no_psx_acl)
8af18971 3154 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
75865f8c 3155 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
b6b38f70 3156 cFYI(1, "negotiated posix acl support");
2c6292ae
AV		 3157 if (cifs_sb)
3158 cifs_sb->mnt_cifs_flags |=
3159 CIFS_MOUNT_POSIXACL;
8af18971
SF		 3160 }
3161
75865f8c 3162 if (vol_info && vol_info->posix_paths == 0)
8af18971 3163 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
75865f8c 3164 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
b6b38f70 3165 cFYI(1, "negotiate posix pathnames");
2c6292ae
AV		 3166 if (cifs_sb)
3167 cifs_sb->mnt_cifs_flags |=
8af18971
SF		 3168 CIFS_MOUNT_POSIX_PATHS;
3169 }
50c2f753 3170
b6b38f70 3171 cFYI(1, "Negotiate caps 0x%x", (int)cap);
8af18971 3172#ifdef CONFIG_CIFS_DEBUG2
75865f8c 3173 if (cap & CIFS_UNIX_FCNTL_CAP)
b6b38f70 3174 cFYI(1, "FCNTL cap");
75865f8c 3175 if (cap & CIFS_UNIX_EXTATTR_CAP)
b6b38f70 3176 cFYI(1, "EXTATTR cap");
75865f8c 3177 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
b6b38f70 3178 cFYI(1, "POSIX path cap");
75865f8c 3179 if (cap & CIFS_UNIX_XATTR_CAP)
b6b38f70 3180 cFYI(1, "XATTR cap");
75865f8c 3181 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
b6b38f70 3182 cFYI(1, "POSIX ACL cap");
75865f8c 3183 if (cap & CIFS_UNIX_LARGE_READ_CAP)
b6b38f70 3184 cFYI(1, "very large read cap");
75865f8c 3185 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
b6b38f70 3186 cFYI(1, "very large write cap");
6848b733
SF		 3187 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
3188 cFYI(1, "transport encryption cap");
3189 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3190 cFYI(1, "mandatory transport encryption cap");
8af18971
SF		 3191#endif /* CIFS_DEBUG2 */
3192 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
442aa310 3193 if (vol_info == NULL) {
b6b38f70 3194 cFYI(1, "resetting capabilities failed");
442aa310 3195 } else
b6b38f70 3196 cERROR(1, "Negotiating Unix capabilities "
ac3aa2f8
JL		 3197 "with the server failed. Consider "
3198 "mounting with the Unix Extensions "
3199 "disabled if problems are found "
5a44b319 3200 "by specifying the nounix mount "
b6b38f70 3201 "option.");
5a44b319 3202
8af18971
SF		 3203 }
3204 }
3205}
3206
724d9f1c
PS		 3207void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3208 struct cifs_sb_info *cifs_sb)
b1c8d2b4 3209{
2de970ff
JL		 3210 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3211
2ced6f69
AV		 3212 spin_lock_init(&cifs_sb->tlink_tree_lock);
3213 cifs_sb->tlink_tree = RB_ROOT;
3214
25c7f41e 3215 /*
5eba8ab3
JL		 3216 * Temporarily set r/wsize for matching superblock. If we end up using
3217 * new sb then client will later negotiate it downward if needed.
25c7f41e 3218 */
5eba8ab3 3219 cifs_sb->rsize = pvolume_info->rsize;
25c7f41e
PS		 3220 cifs_sb->wsize = pvolume_info->wsize;
3221
3b795210
SF		 3222 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3223 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3224 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3225 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
5206efd6 3226 cFYI(1, "file mode: 0x%hx dir mode: 0x%hx",
b6b38f70 3227 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3b795210 3228
6d20e840 3229 cifs_sb->actimeo = pvolume_info->actimeo;
724d9f1c 3230 cifs_sb->local_nls = pvolume_info->local_nls;
6d20e840 3231
3b795210
SF		 3232 if (pvolume_info->noperm)
3233 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3234 if (pvolume_info->setuids)
3235 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3236 if (pvolume_info->server_ino)
3237 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3238 if (pvolume_info->remap)
3239 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3240 if (pvolume_info->no_xattr)
3241 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3242 if (pvolume_info->sfu_emul)
3243 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3244 if (pvolume_info->nobrl)
3245 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
be652445 3246 if (pvolume_info->nostrictsync)
4717bed6 3247 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
13a6e42a
SF		 3248 if (pvolume_info->mand_lock)
3249 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
d4ffff1f
PS		 3250 if (pvolume_info->rwpidforward)
3251 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3b795210
SF		 3252 if (pvolume_info->cifs_acl)
3253 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3c7c87fd 3254 if (pvolume_info->backupuid_specified) {
3d3ea8e6 3255 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3c7c87fd
SP		 3256 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3257 }
3258 if (pvolume_info->backupgid_specified) {
3d3ea8e6 3259 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3c7c87fd
SP		 3260 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3261 }
3b795210
SF		 3262 if (pvolume_info->override_uid)
3263 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3264 if (pvolume_info->override_gid)
3265 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3266 if (pvolume_info->dynperm)
3267 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
fa1df75d
SJ		 3268 if (pvolume_info->fsc)
3269 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
0eb8a132
JL		 3270 if (pvolume_info->multiuser)
3271 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3272 CIFS_MOUNT_NO_PERM);
d39454ff
PS		 3273 if (pvolume_info->strict_io)
3274 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3b795210 3275 if (pvolume_info->direct_io) {
b6b38f70 3276 cFYI(1, "mounting share using direct i/o");
3b795210
SF		 3277 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3278 }
736a3320
SM		 3279 if (pvolume_info->mfsymlinks) {
3280 if (pvolume_info->sfu_emul) {
3281 cERROR(1, "mount option mfsymlinks ignored if sfu "
3282 "mount option is used");
3283 } else {
3284 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3285 }
3286 }
3b795210
SF		 3287
3288 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
b6b38f70
JP		 3289 cERROR(1, "mount option dynperm ignored if cifsacl "
3290 "mount option supported");
b1c8d2b4
JL		 3291}
3292
b9bce2e9
JL		 3293static void
3294cleanup_volume_info_contents(struct smb_vol *volume_info)
1bfe73c2 3295{
b946845a 3296 kfree(volume_info->username);
1bfe73c2 3297 kzfree(volume_info->password);
95c75454 3298 kfree(volume_info->UNC);
b946845a
SF		 3299 kfree(volume_info->domainname);
3300 kfree(volume_info->iocharset);
1bfe73c2 3301 kfree(volume_info->prepath);
b9bce2e9
JL		 3302}
3303
3304void
3305cifs_cleanup_volume_info(struct smb_vol *volume_info)
3306{
3307 if (!volume_info)
3308 return;
3309 cleanup_volume_info_contents(volume_info);
1bfe73c2 3310 kfree(volume_info);
1bfe73c2
IM		 3311}
3312
b9bce2e9 3313
2d6d589d 3314#ifdef CONFIG_CIFS_DFS_UPCALL
6d3ea7e4
SF		 3315/*
3316 * cifs_build_path_to_root returns full path to root when we do not have an
3317 * exiting connection (tcon)
3318 */
1bfe73c2 3319static char *
b2a0fa15 3320build_unc_path_to_root(const struct smb_vol *vol,
1bfe73c2
IM		 3321 const struct cifs_sb_info *cifs_sb)
3322{
b2a0fa15 3323 char *full_path, *pos;
839db3d1 3324 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
b2a0fa15 3325 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
1bfe73c2 3326
b2a0fa15 3327 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
1bfe73c2
IM		 3328 if (full_path == NULL)
3329 return ERR_PTR(-ENOMEM);
3330
b2a0fa15
JL		 3331 strncpy(full_path, vol->UNC, unc_len);
3332 pos = full_path + unc_len;
3333
3334 if (pplen) {
839db3d1 3335 *pos++ = CIFS_DIR_SEP(cifs_sb);
b2a0fa15
JL		 3336 strncpy(pos, vol->prepath, pplen);
3337 pos += pplen;
3338 }
3339
3340 *pos = '\0'; /* add trailing null */
f87d39d9 3341 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
b2a0fa15 3342 cFYI(1, "%s: full_path=%s", __func__, full_path);
1bfe73c2
IM		 3343 return full_path;
3344}
dd613945
SF		 3345
3346/*
3347 * Perform a dfs referral query for a share and (optionally) prefix
3348 *
046462ab
SF		 3349 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3350 * to a string containing updated options for the submount. Otherwise it
3351 * will be left untouched.
dd613945
SF		 3352 *
3353 * Returns the rc from get_dfs_path to the caller, which can be used to
3354 * determine whether there were referrals.
3355 */
3356static int
b669f33c 3357expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
dd613945 3358 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
046462ab 3359 int check_prefix)
dd613945
SF		 3360{
3361 int rc;
3362 unsigned int num_referrals = 0;
3363 struct dfs_info3_param *referrals = NULL;
3364 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3365
3366 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3367 if (IS_ERR(full_path))
3368 return PTR_ERR(full_path);
3369
3370 /* For DFS paths, skip the first '\' of the UNC */
3371 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3372
b669f33c 3373 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
dd613945
SF		 3374 &num_referrals, &referrals,
3375 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3376
3377 if (!rc && num_referrals > 0) {
3378 char *fake_devname = NULL;
3379
3380 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3381 full_path + 1, referrals,
3382 &fake_devname);
3383
3384 free_dfs_info_array(referrals, num_referrals);
046462ab 3385
dd613945
SF		 3386 if (IS_ERR(mdata)) {
3387 rc = PTR_ERR(mdata);
3388 mdata = NULL;
b9bce2e9
JL		 3389 } else {
3390 cleanup_volume_info_contents(volume_info);
b9bce2e9
JL		 3391 rc = cifs_setup_volume_info(volume_info, mdata,
3392 fake_devname);
dd613945 3393 }
b9bce2e9
JL		 3394 kfree(fake_devname);
3395 kfree(cifs_sb->mountdata);
046462ab 3396 cifs_sb->mountdata = mdata;
dd613945
SF		 3397 }
3398 kfree(full_path);
3399 return rc;
3400}
2d6d589d 3401#endif
1bfe73c2 3402
04db79b0
JL		 3403static int
3404cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3405 const char *devname)
1da177e4 3406{
724d9f1c 3407 int rc = 0;
1da177e4 3408
04db79b0
JL		 3409 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3410 return -EINVAL;
1da177e4 3411
7586b765 3412 if (volume_info->nullauth) {
04febabc
JL		 3413 cFYI(1, "Anonymous login");
3414 kfree(volume_info->username);
3415 volume_info->username = NULL;
7586b765 3416 } else if (volume_info->username) {
1da177e4 3417 /* BB fixme parse for domain name here */
b6b38f70 3418 cFYI(1, "Username: %s", volume_info->username);
1da177e4 3419 } else {
bf820679 3420 cifserror("No username specified");
50c2f753
SF		 3421 /* In userspace mount helper we can get user name from alternate
3422 locations such as env variables and files on disk */
04db79b0 3423 return -EINVAL;
1da177e4
LT		 3424 }
3425
1da177e4 3426 /* this is needed for ASCII cp to Unicode converts */
7586b765 3427 if (volume_info->iocharset == NULL) {
a5fc4ce0
JL		 3428 /* load_nls_default cannot return null */
3429 volume_info->local_nls = load_nls_default();
1da177e4 3430 } else {
a5fc4ce0
JL		 3431 volume_info->local_nls = load_nls(volume_info->iocharset);
3432 if (volume_info->local_nls == NULL) {
b6b38f70
JP		 3433 cERROR(1, "CIFS mount error: iocharset %s not found",
3434 volume_info->iocharset);
04db79b0 3435 return -ELIBACC;
1da177e4
LT		 3436 }
3437 }
724d9f1c 3438
724d9f1c
PS		 3439 return rc;
3440}
3441
04db79b0
JL		 3442struct smb_vol *
3443cifs_get_volume_info(char *mount_data, const char *devname)
3444{
3445 int rc;
3446 struct smb_vol *volume_info;
3447
6ee9542a 3448 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
04db79b0
JL		 3449 if (!volume_info)
3450 return ERR_PTR(-ENOMEM);
3451
3452 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3453 if (rc) {
3454 cifs_cleanup_volume_info(volume_info);
3455 volume_info = ERR_PTR(rc);
3456 }
3457
3458 return volume_info;
3459}
3460
724d9f1c 3461int
2c6292ae 3462cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
724d9f1c 3463{
1daaae8f 3464 int rc;
6d5786a3 3465 unsigned int xid;
af4281dc 3466 struct cifs_ses *ses;
96daf2b0 3467 struct cifs_tcon *tcon;
af4281dc 3468 struct TCP_Server_Info *server;
724d9f1c
PS		 3469 char *full_path;
3470 struct tcon_link *tlink;
3471#ifdef CONFIG_CIFS_DFS_UPCALL
3472 int referral_walks_count = 0;
20547490 3473#endif
dd854466
AV		 3474
3475 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3476 if (rc)
3477 return rc;
3478
20547490 3479#ifdef CONFIG_CIFS_DFS_UPCALL
724d9f1c
PS		 3480try_mount_again:
3481 /* cleanup activities if we're chasing a referral */
3482 if (referral_walks_count) {
3483 if (tcon)
3484 cifs_put_tcon(tcon);
af4281dc
PS		 3485 else if (ses)
3486 cifs_put_smb_ses(ses);
724d9f1c 3487
6d5786a3 3488 free_xid(xid);
724d9f1c
PS		 3489 }
3490#endif
1daaae8f 3491 rc = 0;
724d9f1c 3492 tcon = NULL;
af4281dc
PS		 3493 ses = NULL;
3494 server = NULL;
724d9f1c
PS		 3495 full_path = NULL;
3496 tlink = NULL;
3497
6d5786a3 3498 xid = get_xid();
1da177e4 3499
63c038c2 3500 /* get a reference to a tcp session */
af4281dc
PS		 3501 server = cifs_get_tcp_session(volume_info);
3502 if (IS_ERR(server)) {
3503 rc = PTR_ERR(server);
dd854466 3504 bdi_destroy(&cifs_sb->bdi);
63c038c2 3505 goto out;
1da177e4
LT		 3506 }
3507
36988c76 3508 /* get a reference to a SMB session */
af4281dc
PS		 3509 ses = cifs_get_smb_ses(server, volume_info);
3510 if (IS_ERR(ses)) {
3511 rc = PTR_ERR(ses);
3512 ses = NULL;
36988c76 3513 goto mount_fail_check;
1da177e4 3514 }
50c2f753 3515
d00c28de 3516 /* search for existing tcon to this server share */
af4281dc 3517 tcon = cifs_get_tcon(ses, volume_info);
d00c28de
JL		 3518 if (IS_ERR(tcon)) {
3519 rc = PTR_ERR(tcon);
3520 tcon = NULL;
1bfe73c2 3521 goto remote_path_check;
d00c28de 3522 }
1bfe73c2 3523
d82c2df5 3524 /* tell server which Unix caps we support */
29e20f9c 3525 if (cap_unix(tcon->ses)) {
d82c2df5
SF		 3526 /* reset of caps checks mount to see if unix extensions
3527 disabled for just this mount */
2c6292ae 3528 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
6848b733
SF		 3529 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3530 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3531 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3532 rc = -EACCES;
3533 goto mount_fail_check;
3534 }
3535 } else
d82c2df5 3536 tcon->unix_ext = 0; /* server does not support them */
c18c842b 3537
af4281dc
PS		 3538 /* do not care if a following call succeed - informational */
3539 if (!tcon->ipc && server->ops->qfs_tcon)
3540 server->ops->qfs_tcon(xid, tcon);
6848b733 3541
24985c53
PS		 3542 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3543 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
f7910cbd 3544
66bfaadc 3545 /* tune readahead according to rsize */
8f71465c 3546 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
f7910cbd 3547
1bfe73c2 3548remote_path_check:
c1508ca2
SF		 3549#ifdef CONFIG_CIFS_DFS_UPCALL
3550 /*
3551 * Perform an unconditional check for whether there are DFS
3552 * referrals for this path without prefix, to provide support
3553 * for DFS referrals from w2k8 servers which don't seem to respond
3554 * with PATH_NOT_COVERED to requests that include the prefix.
3555 * Chase the referral if found, otherwise continue normally.
3556 */
3557 if (referral_walks_count == 0) {
af4281dc
PS		 3558 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3559 false);
c1508ca2
SF		 3560 if (!refrc) {
3561 referral_walks_count++;
3562 goto try_mount_again;
3563 }
3564 }
3565#endif
3566
f87d39d9 3567 /* check if a whole path is not remote */
70945643 3568 if (!rc && tcon) {
68889f26
PS		 3569 if (!server->ops->is_path_accessible) {
3570 rc = -ENOSYS;
3571 goto mount_fail_check;
3572 }
6d3ea7e4
SF		 3573 /*
3574 * cifs_build_path_to_root works only when we have a valid tcon
3575 */
3576 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
e4cce94c
IM		 3577 if (full_path == NULL) {
3578 rc = -ENOMEM;
3579 goto mount_fail_check;
3580 }
68889f26
PS		 3581 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3582 full_path);
03ceace5 3583 if (rc != 0 && rc != -EREMOTE) {
e4cce94c
IM		 3584 kfree(full_path);
3585 goto mount_fail_check;
3586 }
3587 kfree(full_path);
3588 }
3589
1bfe73c2
IM		 3590 /* get referral if needed */
3591 if (rc == -EREMOTE) {
d036f50f 3592#ifdef CONFIG_CIFS_DFS_UPCALL
5c2503a8
IM		 3593 if (referral_walks_count > MAX_NESTED_LINKS) {
3594 /*
3595 * BB: when we implement proper loop detection,
3596 * we will remove this check. But now we need it
3597 * to prevent an indefinite loop if 'DFS tree' is
3598 * misconfigured (i.e. has loops).
3599 */
3600 rc = -ELOOP;
3601 goto mount_fail_check;
3602 }
1bfe73c2 3603
af4281dc 3604 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
7b91e266 3605
dd613945 3606 if (!rc) {
5c2503a8 3607 referral_walks_count++;
1bfe73c2
IM		 3608 goto try_mount_again;
3609 }
dd613945 3610 goto mount_fail_check;
d036f50f
SF		 3611#else /* No DFS support, return error on mount */
3612 rc = -EOPNOTSUPP;
3613#endif
1bfe73c2
IM		 3614 }
3615
9d002df4
JL		 3616 if (rc)
3617 goto mount_fail_check;
3618
3619 /* now, hang the tcon off of the superblock */
3620 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3621 if (tlink == NULL) {
3622 rc = -ENOMEM;
3623 goto mount_fail_check;
3624 }
3625
af4281dc 3626 tlink->tl_uid = ses->linux_uid;
9d002df4
JL		 3627 tlink->tl_tcon = tcon;
3628 tlink->tl_time = jiffies;
3629 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3630 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3631
b647c35f 3632 cifs_sb->master_tlink = tlink;
9d002df4 3633 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 3634 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
9d002df4 3635 spin_unlock(&cifs_sb->tlink_tree_lock);
413e661c 3636
da472fc8 3637 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 3638 TLINK_IDLE_EXPIRE);
3639
1bfe73c2
IM		 3640mount_fail_check:
3641 /* on error free sesinfo and tcon struct if needed */
3642 if (rc) {
1bfe73c2 3643 /* If find_unc succeeded then rc == 0 so we can not end */
25985edc 3644 /* up accidentally freeing someone elses tcon struct */
1bfe73c2
IM		 3645 if (tcon)
3646 cifs_put_tcon(tcon);
af4281dc
PS		 3647 else if (ses)
3648 cifs_put_smb_ses(ses);
1bfe73c2 3649 else
af4281dc 3650 cifs_put_tcp_session(server);
dd854466 3651 bdi_destroy(&cifs_sb->bdi);
1bfe73c2
IM		 3652 }
3653
70fe7dc0 3654out:
6d5786a3 3655 free_xid(xid);
1da177e4
LT		 3656 return rc;
3657}
3658
8d1bca32
JL		 3659/*
3660 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3661 * pointer may be NULL.
3662 */
1da177e4 3663int
2e6e02ab 3664CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
96daf2b0 3665 const char *tree, struct cifs_tcon *tcon,
1da177e4
LT		 3666 const struct nls_table *nls_codepage)
3667{
3668 struct smb_hdr *smb_buffer;
3669 struct smb_hdr *smb_buffer_response;
3670 TCONX_REQ *pSMB;
3671 TCONX_RSP *pSMBr;
3672 unsigned char *bcc_ptr;
3673 int rc = 0;
690c522f
JL		 3674 int length;
3675 __u16 bytes_left, count;
1da177e4
LT		 3676
3677 if (ses == NULL)
3678 return -EIO;
3679
3680 smb_buffer = cifs_buf_get();
ca43e3be 3681 if (smb_buffer == NULL)
1da177e4 3682 return -ENOMEM;
ca43e3be 3683
1da177e4
LT		 3684 smb_buffer_response = smb_buffer;
3685
3686 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3687 NULL /*no tid */ , 4 /*wct */ );
1982c344 3688
88257360 3689 smb_buffer->Mid = get_next_mid(ses->server);
1da177e4
LT		 3690 smb_buffer->Uid = ses->Suid;
3691 pSMB = (TCONX_REQ *) smb_buffer;
3692 pSMBr = (TCONX_RSP *) smb_buffer_response;
3693
3694 pSMB->AndXCommand = 0xFF;
3695 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
1da177e4 3696 bcc_ptr = &pSMB->Password[0];
8d1bca32 3697 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
eeac8047 3698 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
7c7b25bc 3699 *bcc_ptr = 0; /* password is null byte */
eeac8047 3700 bcc_ptr++; /* skip password */
7c7b25bc 3701 /* already aligned so no need to do it below */
eeac8047 3702 } else {
540b2e37 3703 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
eeac8047
SF		 3704 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3705 specified as required (when that support is added to
3706 the vfs in the future) as only NTLM or the much
7c7b25bc 3707 weaker LANMAN (which we do not send by default) is accepted
eeac8047
SF		 3708 by Samba (not sure whether other servers allow
3709 NTLMv2 password here) */
7c7b25bc 3710#ifdef CONFIG_CIFS_WEAK_PW_HASH
04912d6a 3711 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
00e485b0 3712 (ses->server->secType == LANMAN))
d3ba50b1 3713 calc_lanman_hash(tcon->password, ses->server->cryptkey,
96daf2b0 3714 ses->server->sec_mode &
4e53a3fb
JL		 3715 SECMODE_PW_ENCRYPT ? true : false,
3716 bcc_ptr);
7c7b25bc
SF		 3717 else
3718#endif /* CIFS_WEAK_PW_HASH */
ee2c9258 3719 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
9ef5992e 3720 bcc_ptr, nls_codepage);
eeac8047 3721
540b2e37 3722 bcc_ptr += CIFS_AUTH_RESP_SIZE;
fb8c4b14 3723 if (ses->capabilities & CAP_UNICODE) {
7c7b25bc
SF		 3724 /* must align unicode strings */
3725 *bcc_ptr = 0; /* null byte password */
3726 bcc_ptr++;
3727 }
eeac8047 3728 }
1da177e4 3729
96daf2b0 3730 if (ses->server->sec_mode &
a878fb22 3731 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1da177e4
LT		 3732 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3733
3734 if (ses->capabilities & CAP_STATUS32) {
3735 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3736 }
3737 if (ses->capabilities & CAP_DFS) {
3738 smb_buffer->Flags2 |= SMBFLG2_DFS;
3739 }
3740 if (ses->capabilities & CAP_UNICODE) {
3741 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3742 length =
acbbb76a 3743 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
50c2f753 3744 6 /* max utf8 char length in bytes */ *
a878fb22
SF		 3745 (/* server len*/ + 256 /* share len */), nls_codepage);
3746 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
1da177e4
LT		 3747 bcc_ptr += 2; /* skip trailing null */
3748 } else { /* ASCII */
1da177e4
LT		 3749 strcpy(bcc_ptr, tree);
3750 bcc_ptr += strlen(tree) + 1;
3751 }
3752 strcpy(bcc_ptr, "?????");
3753 bcc_ptr += strlen("?????");
3754 bcc_ptr += 1;
3755 count = bcc_ptr - &pSMB->Password[0];
be8e3b00
SF		 3756 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3757 pSMB->hdr.smb_buf_length) + count);
1da177e4
LT		 3758 pSMB->ByteCount = cpu_to_le16(count);
3759
133672ef 3760 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
7749981e 3761 0);
1da177e4 3762
1da177e4
LT		 3763 /* above now done in SendReceive */
3764 if ((rc == 0) && (tcon != NULL)) {
0e0d2cf3
SF		 3765 bool is_unicode;
3766
1da177e4 3767 tcon->tidStatus = CifsGood;
3b795210 3768 tcon->need_reconnect = false;
1da177e4
LT		 3769 tcon->tid = smb_buffer_response->Tid;
3770 bcc_ptr = pByteArea(smb_buffer_response);
690c522f 3771 bytes_left = get_bcc(smb_buffer_response);
cc20c031 3772 length = strnlen(bcc_ptr, bytes_left - 2);
0e0d2cf3
SF		 3773 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3774 is_unicode = true;
3775 else
3776 is_unicode = false;
3777
cc20c031 3778
50c2f753 3779 /* skip service field (NB: this field is always ASCII) */
7f8ed420
SF		 3780 if (length == 3) {
3781 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3782 (bcc_ptr[2] == 'C')) {
b6b38f70 3783 cFYI(1, "IPC connection");
7f8ed420
SF		 3784 tcon->ipc = 1;
3785 }
3786 } else if (length == 2) {
3787 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3788 /* the most common case */
b6b38f70 3789 cFYI(1, "disk share connection");
7f8ed420
SF		 3790 }
3791 }
50c2f753 3792 bcc_ptr += length + 1;
cc20c031 3793 bytes_left -= (length + 1);
1da177e4 3794 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
cc20c031
JL		 3795
3796 /* mostly informational -- no need to fail on error here */
90a98b2f 3797 kfree(tcon->nativeFileSystem);
acbbb76a 3798 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
0e0d2cf3 3799 bytes_left, is_unicode,
cc20c031
JL		 3800 nls_codepage);
3801
b6b38f70 3802 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
cc20c031 3803
fb8c4b14 3804 if ((smb_buffer_response->WordCount == 3) ||
1a4e15a0
SF		 3805 (smb_buffer_response->WordCount == 7))
3806 /* field is in same location */
3979877e
SF		 3807 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3808 else
3809 tcon->Flags = 0;
b6b38f70 3810 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
1da177e4 3811 } else if ((rc == 0) && tcon == NULL) {
50c2f753 3812 /* all we need to save for IPC$ connection */
1da177e4
LT		 3813 ses->ipc_tid = smb_buffer_response->Tid;
3814 }
3815
a8a11d39 3816 cifs_buf_release(smb_buffer);
1da177e4
LT		 3817 return rc;
3818}
3819
2a9b9951
AV		 3820void
3821cifs_umount(struct cifs_sb_info *cifs_sb)
1da177e4 3822{
b647c35f
JL		 3823 struct rb_root *root = &cifs_sb->tlink_tree;
3824 struct rb_node *node;
3825 struct tcon_link *tlink;
9d002df4 3826
2de970ff
JL		 3827 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3828
b647c35f
JL		 3829 spin_lock(&cifs_sb->tlink_tree_lock);
3830 while ((node = rb_first(root))) {
3831 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3832 cifs_get_tlink(tlink);
3833 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3834 rb_erase(node, root);
1da177e4 3835
b647c35f
JL		 3836 spin_unlock(&cifs_sb->tlink_tree_lock);
3837 cifs_put_tlink(tlink);
3838 spin_lock(&cifs_sb->tlink_tree_lock);
3839 }
3840 spin_unlock(&cifs_sb->tlink_tree_lock);
50c2f753 3841
dd854466 3842 bdi_destroy(&cifs_sb->bdi);
d757d71b
AV		 3843 kfree(cifs_sb->mountdata);
3844 unload_nls(cifs_sb->local_nls);
3845 kfree(cifs_sb);
50c2f753 3846}
1da177e4 3847
286170aa
PS		 3848int
3849cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
1da177e4
LT		 3850{
3851 int rc = 0;
198b5682 3852 struct TCP_Server_Info *server = ses->server;
1da177e4 3853
286170aa
PS		 3854 if (!server->ops->need_neg || !server->ops->negotiate)
3855 return -ENOSYS;
3856
198b5682 3857 /* only send once per connect */
286170aa 3858 if (!server->ops->need_neg(server))
198b5682
JL		 3859 return 0;
3860
45275789 3861 set_credits(server, 1);
286170aa
PS		 3862
3863 rc = server->ops->negotiate(xid, ses);
198b5682
JL		 3864 if (rc == 0) {
3865 spin_lock(&GlobalMid_Lock);
7fdbaa1b 3866 if (server->tcpStatus == CifsNeedNegotiate)
198b5682
JL		 3867 server->tcpStatus = CifsGood;
3868 else
3869 rc = -EHOSTDOWN;
3870 spin_unlock(&GlobalMid_Lock);
198b5682
JL		 3871 }
3872
3873 return rc;
3874}
3875
58c45c58
PS		 3876int
3877cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3878 struct nls_table *nls_info)
198b5682 3879{
58c45c58 3880 int rc = -ENOSYS;
198b5682 3881 struct TCP_Server_Info *server = ses->server;
26b994fa 3882
198b5682
JL		 3883 ses->flags = 0;
3884 ses->capabilities = server->capabilities;
26b994fa 3885 if (linuxExtEnabled == 0)
29e20f9c 3886 ses->capabilities &= (~server->vals->cap_unix);
20418acd 3887
b6b38f70 3888 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
96daf2b0 3889 server->sec_mode, server->capabilities, server->timeAdj);
cb7691b6 3890
58c45c58
PS		 3891 if (server->ops->sess_setup)
3892 rc = server->ops->sess_setup(xid, ses, nls_info);
3893
26b994fa 3894 if (rc) {
b6b38f70 3895 cERROR(1, "Send error in SessSetup = %d", rc);
26b994fa 3896 } else {
5d0d2882
SP		 3897 mutex_lock(&ses->server->srv_mutex);
3898 if (!server->session_estab) {
21e73393 3899 server->session_key.response = ses->auth_key.response;
5d0d2882 3900 server->session_key.len = ses->auth_key.len;
21e73393
SP		 3901 server->sequence_number = 0x2;
3902 server->session_estab = true;
3903 ses->auth_key.response = NULL;
5d0d2882
SP		 3904 }
3905 mutex_unlock(&server->srv_mutex);
3906
b6b38f70 3907 cFYI(1, "CIFS Session Established successfully");
20418acd 3908 spin_lock(&GlobalMid_Lock);
198b5682
JL		 3909 ses->status = CifsGood;
3910 ses->need_reconnect = false;
20418acd 3911 spin_unlock(&GlobalMid_Lock);
1da177e4 3912 }
26b994fa 3913
21e73393
SP		 3914 kfree(ses->auth_key.response);
3915 ses->auth_key.response = NULL;
3916 ses->auth_key.len = 0;
d3686d54
SP		 3917 kfree(ses->ntlmssp);
3918 ses->ntlmssp = NULL;
21e73393 3919
1da177e4
LT		 3920 return rc;
3921}
3922
8a8798a5
JL		 3923static int
3924cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3925{
3926 switch (ses->server->secType) {
3927 case Kerberos:
3928 vol->secFlg = CIFSSEC_MUST_KRB5;
3929 return 0;
3930 case NTLMv2:
3931 vol->secFlg = CIFSSEC_MUST_NTLMV2;
3932 break;
3933 case NTLM:
3934 vol->secFlg = CIFSSEC_MUST_NTLM;
3935 break;
3936 case RawNTLMSSP:
3937 vol->secFlg = CIFSSEC_MUST_NTLMSSP;
3938 break;
3939 case LANMAN:
3940 vol->secFlg = CIFSSEC_MUST_LANMAN;
3941 break;
3942 }
3943
3944 return cifs_set_cifscreds(vol, ses);
3945}
3946
96daf2b0 3947static struct cifs_tcon *
6d4a0832 3948cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
9d002df4 3949{
8a8798a5 3950 int rc;
96daf2b0
SF		 3951 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3952 struct cifs_ses *ses;
3953 struct cifs_tcon *tcon = NULL;
9d002df4 3954 struct smb_vol *vol_info;
9d002df4
JL		 3955
3956 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
803ab977
DC		 3957 if (vol_info == NULL)
3958 return ERR_PTR(-ENOMEM);
9d002df4 3959
9d002df4
JL		 3960 vol_info->local_nls = cifs_sb->local_nls;
3961 vol_info->linux_uid = fsuid;
3962 vol_info->cred_uid = fsuid;
3963 vol_info->UNC = master_tcon->treeName;
3964 vol_info->retry = master_tcon->retry;
3965 vol_info->nocase = master_tcon->nocase;
3966 vol_info->local_lease = master_tcon->local_lease;
3967 vol_info->no_linux_ext = !master_tcon->unix_ext;
3968
8a8798a5
JL		 3969 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3970 if (rc) {
3971 tcon = ERR_PTR(rc);
3972 goto out;
3973 }
9d002df4
JL		 3974
3975 /* get a reference for the same TCP session */
3f9bcca7 3976 spin_lock(&cifs_tcp_ses_lock);
9d002df4 3977 ++master_tcon->ses->server->srv_count;
3f9bcca7 3978 spin_unlock(&cifs_tcp_ses_lock);
9d002df4
JL		 3979
3980 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3981 if (IS_ERR(ses)) {
96daf2b0 3982 tcon = (struct cifs_tcon *)ses;
9d002df4
JL		 3983 cifs_put_tcp_session(master_tcon->ses->server);
3984 goto out;
3985 }
3986
3987 tcon = cifs_get_tcon(ses, vol_info);
3988 if (IS_ERR(tcon)) {
3989 cifs_put_smb_ses(ses);
3990 goto out;
3991 }
3992
29e20f9c 3993 if (cap_unix(ses))
9d002df4
JL		 3994 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3995out:
8a8798a5
JL		 3996 kfree(vol_info->username);
3997 kfree(vol_info->password);
9d002df4
JL		 3998 kfree(vol_info);
3999
4000 return tcon;
4001}
4002
96daf2b0 4003struct cifs_tcon *
9d002df4
JL		 4004cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
4005{
4006 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
4007}
4008
4009static int
4010cifs_sb_tcon_pending_wait(void *unused)
4011{
4012 schedule();
4013 return signal_pending(current) ? -ERESTARTSYS : 0;
4014}
4015
b647c35f
JL		 4016/* find and return a tlink with given uid */
4017static struct tcon_link *
6d4a0832 4018tlink_rb_search(struct rb_root *root, kuid_t uid)
b647c35f
JL		 4019{
4020 struct rb_node *node = root->rb_node;
4021 struct tcon_link *tlink;
4022
4023 while (node) {
4024 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
4025
6d4a0832 4026 if (uid_gt(tlink->tl_uid, uid))
b647c35f 4027 node = node->rb_left;
6d4a0832 4028 else if (uid_lt(tlink->tl_uid, uid))
b647c35f
JL		 4029 node = node->rb_right;
4030 else
4031 return tlink;
4032 }
4033 return NULL;
4034}
4035
4036/* insert a tcon_link into the tree */
4037static void
4038tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
4039{
4040 struct rb_node **new = &(root->rb_node), *parent = NULL;
4041 struct tcon_link *tlink;
4042
4043 while (*new) {
4044 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
4045 parent = *new;
4046
6d4a0832 4047 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
b647c35f
JL		 4048 new = &((*new)->rb_left);
4049 else
4050 new = &((*new)->rb_right);
4051 }
4052
4053 rb_link_node(&new_tlink->tl_rbnode, parent, new);
4054 rb_insert_color(&new_tlink->tl_rbnode, root);
4055}
4056
9d002df4
JL		 4057/*
4058 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
4059 * current task.
4060 *
4061 * If the superblock doesn't refer to a multiuser mount, then just return
4062 * the master tcon for the mount.
4063 *
6ef933a3 4064 * First, search the rbtree for an existing tcon for this fsuid. If one
9d002df4
JL		 4065 * exists, then check to see if it's pending construction. If it is then wait
4066 * for construction to complete. Once it's no longer pending, check to see if
4067 * it failed and either return an error or retry construction, depending on
4068 * the timeout.
4069 *
4070 * If one doesn't exist then insert a new tcon_link struct into the tree and
4071 * try to construct a new one.
4072 */
4073struct tcon_link *
4074cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4075{
4076 int ret;
6d4a0832 4077 kuid_t fsuid = current_fsuid();
9d002df4
JL		 4078 struct tcon_link *tlink, *newtlink;
4079
4080 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4081 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4082
4083 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 4084 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4085 if (tlink)
4086 cifs_get_tlink(tlink);
4087 spin_unlock(&cifs_sb->tlink_tree_lock);
4088
4089 if (tlink == NULL) {
4090 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4091 if (newtlink == NULL)
4092 return ERR_PTR(-ENOMEM);
b647c35f 4093 newtlink->tl_uid = fsuid;
9d002df4
JL		 4094 newtlink->tl_tcon = ERR_PTR(-EACCES);
4095 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4096 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4097 cifs_get_tlink(newtlink);
4098
9d002df4
JL		 4099 spin_lock(&cifs_sb->tlink_tree_lock);
4100 /* was one inserted after previous search? */
b647c35f 4101 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4102 if (tlink) {
4103 cifs_get_tlink(tlink);
4104 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4105 kfree(newtlink);
4106 goto wait_for_construction;
4107 }
9d002df4 4108 tlink = newtlink;
b647c35f
JL		 4109 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4110 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4111 } else {
4112wait_for_construction:
4113 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4114 cifs_sb_tcon_pending_wait,
4115 TASK_INTERRUPTIBLE);
4116 if (ret) {
4117 cifs_put_tlink(tlink);
4118 return ERR_PTR(ret);
4119 }
4120
4121 /* if it's good, return it */
4122 if (!IS_ERR(tlink->tl_tcon))
4123 return tlink;
4124
4125 /* return error if we tried this already recently */
4126 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4127 cifs_put_tlink(tlink);
4128 return ERR_PTR(-EACCES);
4129 }
4130
4131 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4132 goto wait_for_construction;
4133 }
4134
4135 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4136 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4137 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4138
4139 if (IS_ERR(tlink->tl_tcon)) {
4140 cifs_put_tlink(tlink);
4141 return ERR_PTR(-EACCES);
4142 }
4143
4144 return tlink;
4145}
2de970ff
JL		 4146
4147/*
4148 * periodic workqueue job that scans tcon_tree for a superblock and closes
4149 * out tcons.
4150 */
4151static void
4152cifs_prune_tlinks(struct work_struct *work)
4153{
4154 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4155 prune_tlinks.work);
b647c35f
JL		 4156 struct rb_root *root = &cifs_sb->tlink_tree;
4157 struct rb_node *node = rb_first(root);
4158 struct rb_node *tmp;
4159 struct tcon_link *tlink;
2de970ff 4160
b647c35f
JL		 4161 /*
4162 * Because we drop the spinlock in the loop in order to put the tlink
4163 * it's not guarded against removal of links from the tree. The only
4164 * places that remove entries from the tree are this function and
4165 * umounts. Because this function is non-reentrant and is canceled
4166 * before umount can proceed, this is safe.
4167 */
4168 spin_lock(&cifs_sb->tlink_tree_lock);
4169 node = rb_first(root);
4170 while (node != NULL) {
4171 tmp = node;
4172 node = rb_next(tmp);
4173 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4174
4175 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4176 atomic_read(&tlink->tl_count) != 0 ||
4177 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4178 continue;
2de970ff 4179
b647c35f
JL		 4180 cifs_get_tlink(tlink);
4181 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4182 rb_erase(tmp, root);
4183
4184 spin_unlock(&cifs_sb->tlink_tree_lock);
4185 cifs_put_tlink(tlink);
4186 spin_lock(&cifs_sb->tlink_tree_lock);
4187 }
4188 spin_unlock(&cifs_sb->tlink_tree_lock);
2de970ff 4189
da472fc8 4190 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 4191 TLINK_IDLE_EXPIRE);
4192}
Ubuntu Artful kernel mirror