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cifs: Move string length definitions to uapi
[deliverable/linux.git] / fs / cifs / connect.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/cifs/connect.c
3 *
1080ef75 4 * Copyright (C) International Business Machines Corp., 2002,2011
1da177e4
LT		 5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
fb8c4b14 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1da177e4
LT		 20 */
21#include <linux/fs.h>
22#include <linux/net.h>
23#include <linux/string.h>
24#include <linux/list.h>
25#include <linux/wait.h>
5a0e3ad6 26#include <linux/slab.h>
1da177e4
LT		 27#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
b8643e1b 31#include <linux/delay.h>
f191401f 32#include <linux/completion.h>
aaf737ad 33#include <linux/kthread.h>
0ae0efad 34#include <linux/pagevec.h>
7dfb7103 35#include <linux/freezer.h>
5c2503a8 36#include <linux/namei.h>
1da177e4
LT		 37#include <asm/uaccess.h>
38#include <asm/processor.h>
50b64e3b 39#include <linux/inet.h>
143cb494 40#include <linux/module.h>
8a8798a5 41#include <keys/user-type.h>
0e2bedaa 42#include <net/ipv6.h>
8830d7e0
SP		 43#include <linux/parser.h>
44
1da177e4
LT		 45#include "cifspdu.h"
46#include "cifsglob.h"
47#include "cifsproto.h"
48#include "cifs_unicode.h"
49#include "cifs_debug.h"
50#include "cifs_fs_sb.h"
51#include "ntlmssp.h"
52#include "nterr.h"
53#include "rfc1002pdu.h"
488f1d2d 54#include "fscache.h"
1da177e4
LT		 55
56#define CIFS_PORT 445
57#define RFC1001_PORT 139
58
1da177e4
LT		 59extern mempool_t *cifs_req_poolp;
60
2de970ff 61/* FIXME: should these be tunable? */
9d002df4 62#define TLINK_ERROR_EXPIRE (1 * HZ)
2de970ff 63#define TLINK_IDLE_EXPIRE (600 * HZ)
9d002df4 64
8830d7e0
SP		 65enum {
66
67 /* Mount options that take no arguments */
68 Opt_user_xattr, Opt_nouser_xattr,
69 Opt_forceuid, Opt_noforceuid,
72bd481f 70 Opt_forcegid, Opt_noforcegid,
8830d7e0
SP		 71 Opt_noblocksend, Opt_noautotune,
72 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
73 Opt_mapchars, Opt_nomapchars, Opt_sfu,
74 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
75 Opt_noposixpaths, Opt_nounix,
76 Opt_nocase,
77 Opt_brl, Opt_nobrl,
78 Opt_forcemandatorylock, Opt_setuids,
79 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
80 Opt_nohard, Opt_nosoft,
81 Opt_nointr, Opt_intr,
82 Opt_nostrictsync, Opt_strictsync,
83 Opt_serverino, Opt_noserverino,
84 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
85 Opt_acl, Opt_noacl, Opt_locallease,
1b359204 86 Opt_sign, Opt_seal, Opt_noac,
8830d7e0 87 Opt_fsc, Opt_mfsymlinks,
a0b3df5c 88 Opt_multiuser, Opt_sloppy, Opt_nosharesock,
8830d7e0
SP		 89
90 /* Mount options which take numeric value */
91 Opt_backupuid, Opt_backupgid, Opt_uid,
92 Opt_cruid, Opt_gid, Opt_file_mode,
93 Opt_dirmode, Opt_port,
94 Opt_rsize, Opt_wsize, Opt_actimeo,
95
96 /* Mount options which take string value */
97 Opt_user, Opt_pass, Opt_ip,
73a999fa 98 Opt_domain, Opt_srcaddr, Opt_iocharset,
8830d7e0 99 Opt_netbiosname, Opt_servern,
23db65f5 100 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
8830d7e0
SP		 101
102 /* Mount options to be ignored */
103 Opt_ignore,
104
105 /* Options which could be blank */
106 Opt_blank_pass,
4fe9e963
SP		 107 Opt_blank_user,
108 Opt_blank_ip,
8830d7e0
SP		 109
110 Opt_err
111};
112
113static const match_table_t cifs_mount_option_tokens = {
114
115 { Opt_user_xattr, "user_xattr" },
116 { Opt_nouser_xattr, "nouser_xattr" },
117 { Opt_forceuid, "forceuid" },
118 { Opt_noforceuid, "noforceuid" },
72bd481f
JL		 119 { Opt_forcegid, "forcegid" },
120 { Opt_noforcegid, "noforcegid" },
8830d7e0
SP		 121 { Opt_noblocksend, "noblocksend" },
122 { Opt_noautotune, "noautotune" },
123 { Opt_hard, "hard" },
124 { Opt_soft, "soft" },
125 { Opt_perm, "perm" },
126 { Opt_noperm, "noperm" },
127 { Opt_mapchars, "mapchars" },
128 { Opt_nomapchars, "nomapchars" },
129 { Opt_sfu, "sfu" },
130 { Opt_nosfu, "nosfu" },
131 { Opt_nodfs, "nodfs" },
132 { Opt_posixpaths, "posixpaths" },
133 { Opt_noposixpaths, "noposixpaths" },
134 { Opt_nounix, "nounix" },
135 { Opt_nounix, "nolinux" },
136 { Opt_nocase, "nocase" },
137 { Opt_nocase, "ignorecase" },
138 { Opt_brl, "brl" },
139 { Opt_nobrl, "nobrl" },
140 { Opt_nobrl, "nolock" },
141 { Opt_forcemandatorylock, "forcemandatorylock" },
5cfdddcf 142 { Opt_forcemandatorylock, "forcemand" },
8830d7e0
SP		 143 { Opt_setuids, "setuids" },
144 { Opt_nosetuids, "nosetuids" },
145 { Opt_dynperm, "dynperm" },
146 { Opt_nodynperm, "nodynperm" },
147 { Opt_nohard, "nohard" },
148 { Opt_nosoft, "nosoft" },
149 { Opt_nointr, "nointr" },
150 { Opt_intr, "intr" },
151 { Opt_nostrictsync, "nostrictsync" },
152 { Opt_strictsync, "strictsync" },
153 { Opt_serverino, "serverino" },
154 { Opt_noserverino, "noserverino" },
155 { Opt_rwpidforward, "rwpidforward" },
156 { Opt_cifsacl, "cifsacl" },
157 { Opt_nocifsacl, "nocifsacl" },
158 { Opt_acl, "acl" },
159 { Opt_noacl, "noacl" },
160 { Opt_locallease, "locallease" },
161 { Opt_sign, "sign" },
162 { Opt_seal, "seal" },
8830d7e0
SP		 163 { Opt_noac, "noac" },
164 { Opt_fsc, "fsc" },
165 { Opt_mfsymlinks, "mfsymlinks" },
166 { Opt_multiuser, "multiuser" },
d8162558 167 { Opt_sloppy, "sloppy" },
a0b3df5c 168 { Opt_nosharesock, "nosharesock" },
8830d7e0
SP		 169
170 { Opt_backupuid, "backupuid=%s" },
171 { Opt_backupgid, "backupgid=%s" },
172 { Opt_uid, "uid=%s" },
173 { Opt_cruid, "cruid=%s" },
174 { Opt_gid, "gid=%s" },
175 { Opt_file_mode, "file_mode=%s" },
176 { Opt_dirmode, "dirmode=%s" },
177 { Opt_dirmode, "dir_mode=%s" },
178 { Opt_port, "port=%s" },
179 { Opt_rsize, "rsize=%s" },
180 { Opt_wsize, "wsize=%s" },
181 { Opt_actimeo, "actimeo=%s" },
182
4fe9e963
SP		 183 { Opt_blank_user, "user=" },
184 { Opt_blank_user, "username=" },
8830d7e0
SP		 185 { Opt_user, "user=%s" },
186 { Opt_user, "username=%s" },
187 { Opt_blank_pass, "pass=" },
3c15b4cf 188 { Opt_blank_pass, "password=" },
8830d7e0
SP		 189 { Opt_pass, "pass=%s" },
190 { Opt_pass, "password=%s" },
4fe9e963
SP		 191 { Opt_blank_ip, "ip=" },
192 { Opt_blank_ip, "addr=" },
8830d7e0
SP		 193 { Opt_ip, "ip=%s" },
194 { Opt_ip, "addr=%s" },
73a999fa
JL		 195 { Opt_ignore, "unc=%s" },
196 { Opt_ignore, "target=%s" },
197 { Opt_ignore, "path=%s" },
8830d7e0
SP		 198 { Opt_domain, "dom=%s" },
199 { Opt_domain, "domain=%s" },
200 { Opt_domain, "workgroup=%s" },
201 { Opt_srcaddr, "srcaddr=%s" },
73a999fa 202 { Opt_ignore, "prefixpath=%s" },
8830d7e0 203 { Opt_iocharset, "iocharset=%s" },
8830d7e0
SP		 204 { Opt_netbiosname, "netbiosname=%s" },
205 { Opt_servern, "servern=%s" },
206 { Opt_ver, "ver=%s" },
23db65f5 207 { Opt_vers, "vers=%s" },
8830d7e0 208 { Opt_sec, "sec=%s" },
15b6a473 209 { Opt_cache, "cache=%s" },
8830d7e0
SP		 210
211 { Opt_ignore, "cred" },
212 { Opt_ignore, "credentials" },
a557b976
JL		 213 { Opt_ignore, "cred=%s" },
214 { Opt_ignore, "credentials=%s" },
8830d7e0
SP		 215 { Opt_ignore, "guest" },
216 { Opt_ignore, "rw" },
217 { Opt_ignore, "ro" },
218 { Opt_ignore, "suid" },
219 { Opt_ignore, "nosuid" },
220 { Opt_ignore, "exec" },
221 { Opt_ignore, "noexec" },
222 { Opt_ignore, "nodev" },
223 { Opt_ignore, "noauto" },
224 { Opt_ignore, "dev" },
225 { Opt_ignore, "mand" },
226 { Opt_ignore, "nomand" },
227 { Opt_ignore, "_netdev" },
228
229 { Opt_err, NULL }
230};
231
232enum {
233 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
234 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
7659624f
JL		 235 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
236 Opt_sec_ntlmv2i, Opt_sec_lanman,
8830d7e0
SP		 237 Opt_sec_none,
238
239 Opt_sec_err
240};
241
242static const match_table_t cifs_secflavor_tokens = {
243 { Opt_sec_krb5, "krb5" },
244 { Opt_sec_krb5i, "krb5i" },
245 { Opt_sec_krb5p, "krb5p" },
246 { Opt_sec_ntlmsspi, "ntlmsspi" },
247 { Opt_sec_ntlmssp, "ntlmssp" },
248 { Opt_ntlm, "ntlm" },
249 { Opt_sec_ntlmi, "ntlmi" },
7659624f
JL		 250 { Opt_sec_ntlmv2, "nontlm" },
251 { Opt_sec_ntlmv2, "ntlmv2" },
8830d7e0 252 { Opt_sec_ntlmv2i, "ntlmv2i" },
8830d7e0
SP		 253 { Opt_sec_lanman, "lanman" },
254 { Opt_sec_none, "none" },
255
256 { Opt_sec_err, NULL }
257};
258
15b6a473
JL		 259/* cache flavors */
260enum {
261 Opt_cache_loose,
262 Opt_cache_strict,
263 Opt_cache_none,
264 Opt_cache_err
265};
266
267static const match_table_t cifs_cacheflavor_tokens = {
268 { Opt_cache_loose, "loose" },
269 { Opt_cache_strict, "strict" },
270 { Opt_cache_none, "none" },
271 { Opt_cache_err, NULL }
272};
273
23db65f5
JL		 274static const match_table_t cifs_smb_version_tokens = {
275 { Smb_1, SMB1_VERSION_STRING },
dd446b16 276 { Smb_20, SMB20_VERSION_STRING},
1080ef75 277 { Smb_21, SMB21_VERSION_STRING },
e4aa25e7 278 { Smb_30, SMB30_VERSION_STRING },
20b6d8b4 279 { Smb_302, SMB302_VERSION_STRING },
23db65f5
JL		 280};
281
a9f1b85e
PS		 282static int ip_connect(struct TCP_Server_Info *server);
283static int generic_ip_connect(struct TCP_Server_Info *server);
b647c35f 284static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
2de970ff 285static void cifs_prune_tlinks(struct work_struct *work);
b9bce2e9
JL		 286static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
287 const char *devname);
1da177e4 288
d5c5605c
JL		 289/*
290 * cifs tcp session reconnection
291 *
292 * mark tcp session as reconnecting so temporarily locked
293 * mark all smb sessions as reconnecting for tcp session
294 * reconnect tcp session
295 * wake up waiters on reconnection? - (not needed currently)
296 */
28ea5290 297int
1da177e4
LT		 298cifs_reconnect(struct TCP_Server_Info *server)
299{
300 int rc = 0;
f1987b44 301 struct list_head *tmp, *tmp2;
96daf2b0
SF		 302 struct cifs_ses *ses;
303 struct cifs_tcon *tcon;
fb8c4b14 304 struct mid_q_entry *mid_entry;
3c1105df 305 struct list_head retry_list;
50c2f753 306
1da177e4 307 spin_lock(&GlobalMid_Lock);
469ee614 308 if (server->tcpStatus == CifsExiting) {
fb8c4b14 309 /* the demux thread will exit normally
1da177e4
LT		 310 next time through the loop */
311 spin_unlock(&GlobalMid_Lock);
312 return rc;
313 } else
314 server->tcpStatus = CifsNeedReconnect;
315 spin_unlock(&GlobalMid_Lock);
316 server->maxBuf = 0;
aa24d1e9
PS		 317#ifdef CONFIG_CIFS_SMB2
318 server->max_read = 0;
319#endif
1da177e4 320
f96637be 321 cifs_dbg(FYI, "Reconnecting tcp session\n");
1da177e4
LT		 322
323 /* before reconnecting the tcp session, mark the smb session (uid)
324 and the tid bad so they are not used until reconnected */
f96637be
JP		 325 cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n",
326 __func__);
3f9bcca7 327 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 328 list_for_each(tmp, &server->smb_ses_list) {
96daf2b0 329 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
14fbf50d
JL		 330 ses->need_reconnect = true;
331 ses->ipc_tid = 0;
f1987b44 332 list_for_each(tmp2, &ses->tcon_list) {
96daf2b0 333 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
3b795210 334 tcon->need_reconnect = true;
1da177e4 335 }
1da177e4 336 }
3f9bcca7 337 spin_unlock(&cifs_tcp_ses_lock);
2b84a36c 338
1da177e4 339 /* do not want to be sending data on a socket we are freeing */
f96637be 340 cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
72ca545b 341 mutex_lock(&server->srv_mutex);
fb8c4b14 342 if (server->ssocket) {
f96637be
JP		 343 cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n",
344 server->ssocket->state, server->ssocket->flags);
91cf45f0 345 kernel_sock_shutdown(server->ssocket, SHUT_WR);
f96637be
JP		 346 cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n",
347 server->ssocket->state, server->ssocket->flags);
1da177e4
LT		 348 sock_release(server->ssocket);
349 server->ssocket = NULL;
350 }
5d0d2882
SP		 351 server->sequence_number = 0;
352 server->session_estab = false;
21e73393
SP		 353 kfree(server->session_key.response);
354 server->session_key.response = NULL;
355 server->session_key.len = 0;
fda35943 356 server->lstrp = jiffies;
2b84a36c 357 mutex_unlock(&server->srv_mutex);
1da177e4 358
2b84a36c 359 /* mark submitted MIDs for retry and issue callback */
3c1105df 360 INIT_LIST_HEAD(&retry_list);
f96637be 361 cifs_dbg(FYI, "%s: moving mids to private list\n", __func__);
1da177e4 362 spin_lock(&GlobalMid_Lock);
2b84a36c
JL		 363 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
364 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1
PS		 365 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
366 mid_entry->mid_state = MID_RETRY_NEEDED;
3c1105df
JL		 367 list_move(&mid_entry->qhead, &retry_list);
368 }
369 spin_unlock(&GlobalMid_Lock);
370
f96637be 371 cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
3c1105df
JL		 372 list_for_each_safe(tmp, tmp2, &retry_list) {
373 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
2b84a36c
JL		 374 list_del_init(&mid_entry->qhead);
375 mid_entry->callback(mid_entry);
1da177e4 376 }
1da177e4 377
7fdbaa1b 378 do {
6c3d8909 379 try_to_freeze();
a9f1b85e
PS		 380
381 /* we should try only the port we connected to before */
73e216a8 382 mutex_lock(&server->srv_mutex);
a9f1b85e 383 rc = generic_ip_connect(server);
fb8c4b14 384 if (rc) {
f96637be 385 cifs_dbg(FYI, "reconnect error %d\n", rc);
0cb766ae 386 msleep(3000);
1da177e4
LT		 387 } else {
388 atomic_inc(&tcpSesReconnectCount);
389 spin_lock(&GlobalMid_Lock);
469ee614 390 if (server->tcpStatus != CifsExiting)
fd88ce93 391 server->tcpStatus = CifsNeedNegotiate;
fb8c4b14 392 spin_unlock(&GlobalMid_Lock);
1da177e4 393 }
73e216a8 394 mutex_unlock(&server->srv_mutex);
7fdbaa1b 395 } while (server->tcpStatus == CifsNeedReconnect);
2b84a36c 396
1da177e4
LT		 397 return rc;
398}
399
c74093b6
JL		 400static void
401cifs_echo_request(struct work_struct *work)
402{
403 int rc;
404 struct TCP_Server_Info *server = container_of(work,
405 struct TCP_Server_Info, echo.work);
406
247ec9b4 407 /*
f6d76178
PS		 408 * We cannot send an echo if it is disabled or until the
409 * NEGOTIATE_PROTOCOL request is done, which is indicated by
410 * server->ops->need_neg() == true. Also, no need to ping if
411 * we got a response recently.
247ec9b4 412 */
286170aa 413 if (!server->ops->need_neg || server->ops->need_neg(server) ||
f6d76178 414 (server->ops->can_echo && !server->ops->can_echo(server)) ||
247ec9b4 415 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
c74093b6
JL		 416 goto requeue_echo;
417
f6d76178 418 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
c74093b6 419 if (rc)
f96637be
JP		 420 cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
421 server->hostname);
c74093b6
JL		 422
423requeue_echo:
da472fc8 424 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
c74093b6
JL		 425}
426
3d9c2472 427static bool
2a37ef94 428allocate_buffers(struct TCP_Server_Info *server)
3d9c2472 429{
2a37ef94
JL		 430 if (!server->bigbuf) {
431 server->bigbuf = (char *)cifs_buf_get();
432 if (!server->bigbuf) {
f96637be 433 cifs_dbg(VFS, "No memory for large SMB response\n");
3d9c2472
PS		 434 msleep(3000);
435 /* retry will check if exiting */
436 return false;
437 }
2a37ef94 438 } else if (server->large_buf) {
3d9c2472 439 /* we are reusing a dirty large buf, clear its start */
1887f601 440 memset(server->bigbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 441 }
442
2a37ef94
JL		 443 if (!server->smallbuf) {
444 server->smallbuf = (char *)cifs_small_buf_get();
445 if (!server->smallbuf) {
f96637be 446 cifs_dbg(VFS, "No memory for SMB response\n");
3d9c2472
PS		 447 msleep(1000);
448 /* retry will check if exiting */
449 return false;
450 }
451 /* beginning of smb buffer is cleared in our buf_get */
452 } else {
453 /* if existing small buf clear beginning */
1887f601 454 memset(server->smallbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 455 }
456
3d9c2472
PS		 457 return true;
458}
459
ba749e6d
JL		 460static bool
461server_unresponsive(struct TCP_Server_Info *server)
462{
6dae51a5
PS		 463 /*
464 * We need to wait 2 echo intervals to make sure we handle such
465 * situations right:
466 * 1s client sends a normal SMB request
467 * 2s client gets a response
468 * 30s echo workqueue job pops, and decides we got a response recently
469 * and don't need to send another
470 * ...
471 * 65s kernel_recvmsg times out, and we see that we haven't gotten
472 * a response in >60s.
473 */
474 if (server->tcpStatus == CifsGood &&
475 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
f96637be
JP		 476 cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n",
477 server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ);
ba749e6d
JL		 478 cifs_reconnect(server);
479 wake_up(&server->response_q);
480 return true;
481 }
482
483 return false;
484}
485
42c4dfc2
JL		 486/*
487 * kvec_array_init - clone a kvec array, and advance into it
488 * @new: pointer to memory for cloned array
489 * @iov: pointer to original array
490 * @nr_segs: number of members in original array
491 * @bytes: number of bytes to advance into the cloned array
492 *
493 * This function will copy the array provided in iov to a section of memory
494 * and advance the specified number of bytes into the new array. It returns
495 * the number of segments in the new array. "new" must be at least as big as
496 * the original iov array.
497 */
498static unsigned int
499kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
500 size_t bytes)
501{
502 size_t base = 0;
503
504 while (bytes || !iov->iov_len) {
505 int copy = min(bytes, iov->iov_len);
506
507 bytes -= copy;
508 base += copy;
509 if (iov->iov_len == base) {
510 iov++;
511 nr_segs--;
512 base = 0;
513 }
514 }
515 memcpy(new, iov, sizeof(*iov) * nr_segs);
516 new->iov_base += base;
517 new->iov_len -= base;
518 return nr_segs;
519}
520
1041e3f9
JL		 521static struct kvec *
522get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
e7015fb1 523{
1041e3f9
JL		 524 struct kvec *new_iov;
525
526 if (server->iov && nr_segs <= server->nr_iov)
527 return server->iov;
528
529 /* not big enough -- allocate a new one and release the old */
530 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
531 if (new_iov) {
532 kfree(server->iov);
533 server->iov = new_iov;
534 server->nr_iov = nr_segs;
535 }
536 return new_iov;
537}
538
e28bc5b1
JL		 539int
540cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
541 unsigned int nr_segs, unsigned int to_read)
e7015fb1 542{
a52c1eb7
JL		 543 int length = 0;
544 int total_read;
42c4dfc2 545 unsigned int segs;
e831e6cf 546 struct msghdr smb_msg;
42c4dfc2
JL		 547 struct kvec *iov;
548
1041e3f9 549 iov = get_server_iovec(server, nr_segs);
42c4dfc2
JL		 550 if (!iov)
551 return -ENOMEM;
e7015fb1 552
e831e6cf
JL		 553 smb_msg.msg_control = NULL;
554 smb_msg.msg_controllen = 0;
555
a52c1eb7 556 for (total_read = 0; to_read; total_read += length, to_read -= length) {
95edcff4
JL		 557 try_to_freeze();
558
ba749e6d 559 if (server_unresponsive(server)) {
a52c1eb7 560 total_read = -EAGAIN;
ba749e6d
JL		 561 break;
562 }
563
42c4dfc2
JL		 564 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
565
566 length = kernel_recvmsg(server->ssocket, &smb_msg,
567 iov, segs, to_read, 0);
e7015fb1 568
e7015fb1 569 if (server->tcpStatus == CifsExiting) {
a52c1eb7 570 total_read = -ESHUTDOWN;
e7015fb1
PS		 571 break;
572 } else if (server->tcpStatus == CifsNeedReconnect) {
573 cifs_reconnect(server);
a52c1eb7 574 total_read = -EAGAIN;
e7015fb1
PS		 575 break;
576 } else if (length == -ERESTARTSYS ||
577 length == -EAGAIN ||
578 length == -EINTR) {
579 /*
580 * Minimum sleep to prevent looping, allowing socket
581 * to clear and app threads to set tcpStatus
582 * CifsNeedReconnect if server hung.
583 */
584 usleep_range(1000, 2000);
585 length = 0;
a52c1eb7 586 continue;
e7015fb1 587 } else if (length <= 0) {
f96637be
JP		 588 cifs_dbg(FYI, "Received no data or error: expecting %d\n"
589 "got %d", to_read, length);
e7015fb1 590 cifs_reconnect(server);
a52c1eb7 591 total_read = -EAGAIN;
e7015fb1
PS		 592 break;
593 }
594 }
a52c1eb7 595 return total_read;
e7015fb1 596}
e7015fb1 597
e28bc5b1
JL		 598int
599cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
600 unsigned int to_read)
42c4dfc2
JL		 601{
602 struct kvec iov;
603
604 iov.iov_base = buf;
605 iov.iov_len = to_read;
606
e28bc5b1 607 return cifs_readv_from_socket(server, &iov, 1, to_read);
e7015fb1
PS		 608}
609
98bac62c 610static bool
fe11e4cc 611is_smb_response(struct TCP_Server_Info *server, unsigned char type)
98bac62c 612{
98bac62c
PS		 613 /*
614 * The first byte big endian of the length field,
615 * is actually not part of the length but the type
616 * with the most common, zero, as regular data.
617 */
fe11e4cc
JL		 618 switch (type) {
619 case RFC1002_SESSION_MESSAGE:
620 /* Regular SMB response */
621 return true;
622 case RFC1002_SESSION_KEEP_ALIVE:
f96637be 623 cifs_dbg(FYI, "RFC 1002 session keep alive\n");
fe11e4cc
JL		 624 break;
625 case RFC1002_POSITIVE_SESSION_RESPONSE:
f96637be 626 cifs_dbg(FYI, "RFC 1002 positive session response\n");
fe11e4cc
JL		 627 break;
628 case RFC1002_NEGATIVE_SESSION_RESPONSE:
98bac62c
PS		 629 /*
630 * We get this from Windows 98 instead of an error on
631 * SMB negprot response.
632 */
f96637be 633 cifs_dbg(FYI, "RFC 1002 negative session response\n");
98bac62c
PS		 634 /* give server a second to clean up */
635 msleep(1000);
636 /*
637 * Always try 445 first on reconnect since we get NACK
638 * on some if we ever connected to port 139 (the NACK
639 * is since we do not begin with RFC1001 session
640 * initialize frame).
641 */
fe11e4cc 642 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
98bac62c
PS		 643 cifs_reconnect(server);
644 wake_up(&server->response_q);
fe11e4cc
JL		 645 break;
646 default:
f96637be 647 cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
98bac62c 648 cifs_reconnect(server);
98bac62c
PS		 649 }
650
fe11e4cc 651 return false;
98bac62c
PS		 652}
653
e28bc5b1
JL		 654void
655dequeue_mid(struct mid_q_entry *mid, bool malformed)
ea1f4502 656{
ad69bae1 657#ifdef CONFIG_CIFS_STATS2
ea1f4502 658 mid->when_received = jiffies;
ad69bae1 659#endif
ea1f4502
JL		 660 spin_lock(&GlobalMid_Lock);
661 if (!malformed)
7c9421e1 662 mid->mid_state = MID_RESPONSE_RECEIVED;
ea1f4502 663 else
7c9421e1 664 mid->mid_state = MID_RESPONSE_MALFORMED;
ea1f4502 665 list_del_init(&mid->qhead);
ad69bae1 666 spin_unlock(&GlobalMid_Lock);
ea1f4502 667}
ad69bae1 668
c8054ebd
JL		 669static void
670handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
d4e4854f 671 char *buf, int malformed)
ea1f4502 672{
316cf94a
PS		 673 if (server->ops->check_trans2 &&
674 server->ops->check_trans2(mid, server, buf, malformed))
c8054ebd 675 return;
ea1f4502 676 mid->resp_buf = buf;
7c9421e1 677 mid->large_buf = server->large_buf;
2a37ef94
JL		 678 /* Was previous buf put in mpx struct for multi-rsp? */
679 if (!mid->multiRsp) {
680 /* smb buffer will be freed by user thread */
681 if (server->large_buf)
682 server->bigbuf = NULL;
683 else
684 server->smallbuf = NULL;
685 }
ffc00e27 686 dequeue_mid(mid, malformed);
ad69bae1
PS		 687}
688
762dfd10
PS		 689static void clean_demultiplex_info(struct TCP_Server_Info *server)
690{
691 int length;
692
693 /* take it off the list, if it's not already */
694 spin_lock(&cifs_tcp_ses_lock);
695 list_del_init(&server->tcp_ses_list);
696 spin_unlock(&cifs_tcp_ses_lock);
697
698 spin_lock(&GlobalMid_Lock);
699 server->tcpStatus = CifsExiting;
700 spin_unlock(&GlobalMid_Lock);
701 wake_up_all(&server->response_q);
702
2d86dbc9 703 /* check if we have blocked requests that need to free */
fc40f9cf 704 spin_lock(&server->req_lock);
2d86dbc9
PS		 705 if (server->credits <= 0)
706 server->credits = 1;
fc40f9cf 707 spin_unlock(&server->req_lock);
762dfd10
PS		 708 /*
709 * Although there should not be any requests blocked on this queue it
710 * can not hurt to be paranoid and try to wake up requests that may
711 * haven been blocked when more than 50 at time were on the wire to the
712 * same server - they now will see the session is in exit state and get
713 * out of SendReceive.
714 */
715 wake_up_all(&server->request_q);
716 /* give those requests time to exit */
717 msleep(125);
718
719 if (server->ssocket) {
720 sock_release(server->ssocket);
721 server->ssocket = NULL;
722 }
723
724 if (!list_empty(&server->pending_mid_q)) {
725 struct list_head dispose_list;
726 struct mid_q_entry *mid_entry;
727 struct list_head *tmp, *tmp2;
728
729 INIT_LIST_HEAD(&dispose_list);
730 spin_lock(&GlobalMid_Lock);
731 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
732 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
f96637be 733 cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid);
7c9421e1 734 mid_entry->mid_state = MID_SHUTDOWN;
762dfd10
PS		 735 list_move(&mid_entry->qhead, &dispose_list);
736 }
737 spin_unlock(&GlobalMid_Lock);
738
739 /* now walk dispose list and issue callbacks */
740 list_for_each_safe(tmp, tmp2, &dispose_list) {
741 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
f96637be 742 cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid);
762dfd10
PS		 743 list_del_init(&mid_entry->qhead);
744 mid_entry->callback(mid_entry);
745 }
746 /* 1/8th of sec is more than enough time for them to exit */
747 msleep(125);
748 }
749
750 if (!list_empty(&server->pending_mid_q)) {
751 /*
752 * mpx threads have not exited yet give them at least the smb
753 * send timeout time for long ops.
754 *
755 * Due to delays on oplock break requests, we need to wait at
756 * least 45 seconds before giving up on a request getting a
757 * response and going ahead and killing cifsd.
758 */
f96637be 759 cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
762dfd10
PS		 760 msleep(46000);
761 /*
762 * If threads still have not exited they are probably never
763 * coming home not much else we can do but free the memory.
764 */
765 }
766
767 kfree(server->hostname);
1041e3f9 768 kfree(server->iov);
762dfd10
PS		 769 kfree(server);
770
771 length = atomic_dec_return(&tcpSesAllocCount);
772 if (length > 0)
773 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
774 GFP_KERNEL);
775}
776
e9097ab4
JL		 777static int
778standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
779{
780 int length;
781 char *buf = server->smallbuf;
d4e4854f 782 unsigned int pdu_length = get_rfc1002_length(buf);
e9097ab4
JL		 783
784 /* make sure this will fit in a large buffer */
1887f601 785 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
f96637be 786 cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
e9097ab4
JL		 787 cifs_reconnect(server);
788 wake_up(&server->response_q);
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;
f96637be 844 cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
93d0ec85
JL		 845
846 length = atomic_inc_return(&tcpSesAllocCount);
847 if (length > 1)
26f57364
SF		 848 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
849 GFP_KERNEL);
1da177e4 850
83144186 851 set_freezable();
469ee614 852 while (server->tcpStatus != CifsExiting) {
ede1327e
SF		 853 if (try_to_freeze())
854 continue;
b8643e1b 855
2a37ef94 856 if (!allocate_buffers(server))
3d9c2472 857 continue;
b8643e1b 858
2a37ef94 859 server->large_buf = false;
2a37ef94 860 buf = server->smallbuf;
f01d5e14 861 pdu_length = 4; /* enough to get RFC1001 header */
fda35943 862
e28bc5b1 863 length = cifs_read_from_socket(server, buf, pdu_length);
a52c1eb7 864 if (length < 0)
1da177e4 865 continue;
2a37ef94 866 server->total_read = length;
1da177e4 867
98bac62c
PS		 868 /*
869 * The right amount was read from socket - 4 bytes,
870 * so we can now interpret the length field.
871 */
d4e4854f 872 pdu_length = get_rfc1002_length(buf);
70ca734a 873
f96637be 874 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
fe11e4cc 875 if (!is_smb_response(server, buf[0]))
fb8c4b14 876 continue;
e4eb295d 877
89482a56 878 /* make sure we have enough to get to the MID */
1887f601 879 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
f96637be
JP		 880 cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
881 pdu_length);
89482a56
JL		 882 cifs_reconnect(server);
883 wake_up(&server->response_q);
884 continue;
e4eb295d 885 }
e7015fb1 886
89482a56 887 /* read down to the MID */
e28bc5b1 888 length = cifs_read_from_socket(server, buf + 4,
1887f601 889 HEADER_SIZE(server) - 1 - 4);
89482a56 890 if (length < 0)
e4eb295d 891 continue;
2a37ef94 892 server->total_read += length;
1da177e4 893
8aa26f3e 894 mid_entry = server->ops->find_mid(server, buf);
50c2f753 895
44d22d84
JL		 896 if (!mid_entry || !mid_entry->receive)
897 length = standard_receive3(server, mid_entry);
898 else
899 length = mid_entry->receive(server, mid_entry);
71823baf 900
e9097ab4 901 if (length < 0)
fe11e4cc 902 continue;
1da177e4 903
d4e4854f 904 if (server->large_buf)
2a37ef94 905 buf = server->bigbuf;
fda35943 906
fda35943 907 server->lstrp = jiffies;
2b84a36c 908 if (mid_entry != NULL) {
2a37ef94
JL		 909 if (!mid_entry->multiRsp || mid_entry->multiEnd)
910 mid_entry->callback(mid_entry);
7f0adb53
PS		 911 } else if (!server->ops->is_oplock_break ||
912 !server->ops->is_oplock_break(buf, server)) {
f96637be
JP		 913 cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
914 atomic_read(&midCount));
1887f601
PS		 915 cifs_dump_mem("Received Data is: ", buf,
916 HEADER_SIZE(server));
3979877e 917#ifdef CONFIG_CIFS_DEBUG2
7f0adb53
PS		 918 if (server->ops->dump_detail)
919 server->ops->dump_detail(buf);
3979877e
SF		 920 cifs_dump_mids(server);
921#endif /* CIFS_DEBUG2 */
50c2f753 922
e4eb295d
SF		 923 }
924 } /* end while !EXITING */
925
fd62cb7e 926 /* buffer usually freed in free_mid - need to free it here on exit */
2a37ef94
JL		 927 cifs_buf_release(server->bigbuf);
928 if (server->smallbuf) /* no sense logging a debug message if NULL */
929 cifs_small_buf_release(server->smallbuf);
1da177e4 930
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
1e3cc57e
JL		 1031 /*
1032 * With mount options, the last one should win. Reset any existing
1033 * settings back to default.
1034 */
1035 vol->sectype = Unspecified;
1036 vol->sign = false;
1037
8830d7e0 1038 switch (match_token(value, cifs_secflavor_tokens, args)) {
3f618223
JL		 1039 case Opt_sec_krb5p:
1040 cifs_dbg(VFS, "sec=krb5p is not supported!\n");
1041 return 1;
1042 case Opt_sec_krb5i:
1043 vol->sign = true;
1044 /* Fallthrough */
8830d7e0 1045 case Opt_sec_krb5:
1e3cc57e 1046 vol->sectype = Kerberos;
8830d7e0 1047 break;
3f618223 1048 case Opt_sec_ntlmsspi:
1e3cc57e 1049 vol->sign = true;
3f618223 1050 /* Fallthrough */
8830d7e0 1051 case Opt_sec_ntlmssp:
1e3cc57e 1052 vol->sectype = RawNTLMSSP;
8830d7e0 1053 break;
3f618223 1054 case Opt_sec_ntlmi:
1e3cc57e 1055 vol->sign = true;
3f618223 1056 /* Fallthrough */
8830d7e0 1057 case Opt_ntlm:
1e3cc57e 1058 vol->sectype = NTLM;
8830d7e0 1059 break;
3f618223 1060 case Opt_sec_ntlmv2i:
1e3cc57e 1061 vol->sign = true;
3f618223 1062 /* Fallthrough */
7659624f 1063 case Opt_sec_ntlmv2:
1e3cc57e 1064 vol->sectype = NTLMv2;
8830d7e0
SP		 1065 break;
1066#ifdef CONFIG_CIFS_WEAK_PW_HASH
1067 case Opt_sec_lanman:
1e3cc57e 1068 vol->sectype = LANMAN;
8830d7e0
SP		 1069 break;
1070#endif
1071 case Opt_sec_none:
1072 vol->nullauth = 1;
1073 break;
1074 default:
f96637be 1075 cifs_dbg(VFS, "bad security option: %s\n", value);
8830d7e0
SP		 1076 return 1;
1077 }
1078
1079 return 0;
1080}
1081
15b6a473
JL		 1082static int
1083cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1084{
1085 substring_t args[MAX_OPT_ARGS];
1086
1087 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1088 case Opt_cache_loose:
1089 vol->direct_io = false;
1090 vol->strict_io = false;
1091 break;
1092 case Opt_cache_strict:
1093 vol->direct_io = false;
1094 vol->strict_io = true;
1095 break;
1096 case Opt_cache_none:
1097 vol->direct_io = true;
1098 vol->strict_io = false;
1099 break;
1100 default:
f96637be 1101 cifs_dbg(VFS, "bad cache= option: %s\n", value);
15b6a473
JL		 1102 return 1;
1103 }
1104 return 0;
1105}
1106
23db65f5
JL		 1107static int
1108cifs_parse_smb_version(char *value, struct smb_vol *vol)
1109{
1110 substring_t args[MAX_OPT_ARGS];
1111
1112 switch (match_token(value, cifs_smb_version_tokens, args)) {
1113 case Smb_1:
1114 vol->ops = &smb1_operations;
1115 vol->vals = &smb1_values;
1116 break;
1080ef75 1117#ifdef CONFIG_CIFS_SMB2
dd446b16
SF		 1118 case Smb_20:
1119 vol->ops = &smb21_operations; /* currently identical with 2.1 */
1120 vol->vals = &smb20_values;
1121 break;
1080ef75
SF		 1122 case Smb_21:
1123 vol->ops = &smb21_operations;
1124 vol->vals = &smb21_values;
1125 break;
e4aa25e7 1126 case Smb_30:
38107d45 1127 vol->ops = &smb30_operations;
e4aa25e7
SF		 1128 vol->vals = &smb30_values;
1129 break;
20b6d8b4
SF		 1130 case Smb_302:
1131 vol->ops = &smb30_operations; /* currently identical with 3.0 */
1132 vol->vals = &smb302_values;
1133 break;
1080ef75 1134#endif
23db65f5 1135 default:
f96637be 1136 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
23db65f5
JL		 1137 return 1;
1138 }
1139 return 0;
1140}
1141
d387a5c5
JL		 1142/*
1143 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1144 * fields with the result. Returns 0 on success and an error otherwise.
1145 */
1146static int
1147cifs_parse_devname(const char *devname, struct smb_vol *vol)
1148{
1149 char *pos;
1150 const char *delims = "/\\";
1151 size_t len;
1152
1153 /* make sure we have a valid UNC double delimiter prefix */
1154 len = strspn(devname, delims);
1155 if (len != 2)
1156 return -EINVAL;
1157
1158 /* find delimiter between host and sharename */
1159 pos = strpbrk(devname + 2, delims);
1160 if (!pos)
1161 return -EINVAL;
1162
1163 /* skip past delimiter */
1164 ++pos;
1165
1166 /* now go until next delimiter or end of string */
1167 len = strcspn(pos, delims);
1168
1169 /* move "pos" up to delimiter or NULL */
1170 pos += len;
1171 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1172 if (!vol->UNC)
1173 return -ENOMEM;
1174
1175 convert_delimiter(vol->UNC, '\\');
1176
1177 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1178 if (!*pos++ || !*pos)
1179 return 0;
1180
1181 vol->prepath = kstrdup(pos, GFP_KERNEL);
1182 if (!vol->prepath)
1183 return -ENOMEM;
1184
1185 return 0;
1186}
1187
1da177e4 1188static int
b946845a 1189cifs_parse_mount_options(const char *mountdata, const char *devname,
50c2f753 1190 struct smb_vol *vol)
1da177e4 1191{
8830d7e0 1192 char *data, *end;
957df453 1193 char *mountdata_copy = NULL, *options;
1da177e4
LT		 1194 unsigned int temp_len, i, j;
1195 char separator[2];
9b9d6b24
JL		 1196 short int override_uid = -1;
1197 short int override_gid = -1;
1198 bool uid_specified = false;
1199 bool gid_specified = false;
d8162558
JL		 1200 bool sloppy = false;
1201 char *invalid = NULL;
88463999 1202 char *nodename = utsname()->nodename;
8830d7e0
SP		 1203 char *string = NULL;
1204 char *tmp_end, *value;
1205 char delim;
b979aaa1
JL		 1206 bool got_ip = false;
1207 unsigned short port = 0;
1208 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1da177e4
LT		 1209
1210 separator[0] = ',';
50c2f753 1211 separator[1] = 0;
8830d7e0 1212 delim = separator[0];
1da177e4 1213
6ee9542a
JL		 1214 /* ensure we always start with zeroed-out smb_vol */
1215 memset(vol, 0, sizeof(*vol));
1216
88463999
JL		 1217 /*
1218 * does not have to be perfect mapping since field is
1219 * informational, only used for servers that do not support
1220 * port 445 and it can be overridden at mount time
1221 */
1397f2ee
JL		 1222 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1223 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
88463999
JL		 1224 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1225
1397f2ee 1226 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
a10faeb2
SF		 1227 /* null target name indicates to use *SMBSERVR default called name
1228 if we end up sending RFC1001 session initialize */
1229 vol->target_rfc1001_name[0] = 0;
3e4b3e1f
JL		 1230 vol->cred_uid = current_uid();
1231 vol->linux_uid = current_uid();
a001e5b5 1232 vol->linux_gid = current_gid();
f55ed1a8
JL		 1233
1234 /* default to only allowing write access to owner of the mount */
1235 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1da177e4
LT		 1236
1237 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
ac67055e
JA		 1238 /* default is always to request posix paths. */
1239 vol->posix_paths = 1;
a0c9217f
JL		 1240 /* default to using server inode numbers where available */
1241 vol->server_ino = 1;
ac67055e 1242
1b359204
JL		 1243 /* default is to use strict cifs caching semantics */
1244 vol->strict_io = true;
1245
6d20e840
SJ		 1246 vol->actimeo = CIFS_DEF_ACTIMEO;
1247
23db65f5
JL		 1248 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1249 vol->ops = &smb1_operations;
1250 vol->vals = &smb1_values;
1251
b946845a
SF		 1252 if (!mountdata)
1253 goto cifs_parse_mount_err;
1254
1255 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1256 if (!mountdata_copy)
1257 goto cifs_parse_mount_err;
1da177e4 1258
b946845a 1259 options = mountdata_copy;
4906e50b 1260 end = options + strlen(options);
8830d7e0 1261
50c2f753 1262 if (strncmp(options, "sep=", 4) == 0) {
fb8c4b14 1263 if (options[4] != 0) {
1da177e4
LT		 1264 separator[0] = options[4];
1265 options += 5;
1266 } else {
f96637be 1267 cifs_dbg(FYI, "Null separator not allowed\n");
1da177e4
LT		 1268 }
1269 }
3d3ea8e6
SP		 1270 vol->backupuid_specified = false; /* no backup intent for a user */
1271 vol->backupgid_specified = false; /* no backup intent for a group */
50c2f753 1272
37d4f99b
JL		 1273 switch (cifs_parse_devname(devname, vol)) {
1274 case 0:
1275 break;
1276 case -ENOMEM:
1277 cifs_dbg(VFS, "Unable to allocate memory for devname.\n");
1278 goto cifs_parse_mount_err;
1279 case -EINVAL:
1280 cifs_dbg(VFS, "Malformed UNC in devname.\n");
1281 goto cifs_parse_mount_err;
1282 default:
1283 cifs_dbg(VFS, "Unknown error parsing devname.\n");
1284 goto cifs_parse_mount_err;
d387a5c5
JL		 1285 }
1286
1da177e4 1287 while ((data = strsep(&options, separator)) != NULL) {
8830d7e0
SP		 1288 substring_t args[MAX_OPT_ARGS];
1289 unsigned long option;
1290 int token;
1291
1da177e4
LT		 1292 if (!*data)
1293 continue;
1da177e4 1294
8830d7e0
SP		 1295 token = match_token(data, cifs_mount_option_tokens, args);
1296
1297 switch (token) {
1298
1299 /* Ingnore the following */
1300 case Opt_ignore:
1301 break;
1302
1303 /* Boolean values */
1304 case Opt_user_xattr:
1da177e4 1305 vol->no_xattr = 0;
8830d7e0
SP		 1306 break;
1307 case Opt_nouser_xattr:
1da177e4 1308 vol->no_xattr = 1;
8830d7e0
SP		 1309 break;
1310 case Opt_forceuid:
9b9d6b24 1311 override_uid = 1;
8830d7e0
SP		 1312 break;
1313 case Opt_noforceuid:
9b9d6b24 1314 override_uid = 0;
8830d7e0 1315 break;
72bd481f
JL		 1316 case Opt_forcegid:
1317 override_gid = 1;
1318 break;
1319 case Opt_noforcegid:
1320 override_gid = 0;
1321 break;
8830d7e0 1322 case Opt_noblocksend:
edf1ae40 1323 vol->noblocksnd = 1;
8830d7e0
SP		 1324 break;
1325 case Opt_noautotune:
edf1ae40 1326 vol->noautotune = 1;
8830d7e0
SP		 1327 break;
1328 case Opt_hard:
1da177e4 1329 vol->retry = 1;
8830d7e0
SP		 1330 break;
1331 case Opt_soft:
1da177e4 1332 vol->retry = 0;
8830d7e0
SP		 1333 break;
1334 case Opt_perm:
1da177e4 1335 vol->noperm = 0;
8830d7e0
SP		 1336 break;
1337 case Opt_noperm:
1da177e4 1338 vol->noperm = 1;
8830d7e0
SP		 1339 break;
1340 case Opt_mapchars:
6a0b4824 1341 vol->remap = 1;
8830d7e0
SP		 1342 break;
1343 case Opt_nomapchars:
6a0b4824 1344 vol->remap = 0;
8830d7e0
SP		 1345 break;
1346 case Opt_sfu:
50c2f753 1347 vol->sfu_emul = 1;
8830d7e0
SP		 1348 break;
1349 case Opt_nosfu:
50c2f753 1350 vol->sfu_emul = 0;
8830d7e0
SP		 1351 break;
1352 case Opt_nodfs:
2c1b8615 1353 vol->nodfs = 1;
8830d7e0
SP		 1354 break;
1355 case Opt_posixpaths:
ac67055e 1356 vol->posix_paths = 1;
8830d7e0
SP		 1357 break;
1358 case Opt_noposixpaths:
ac67055e 1359 vol->posix_paths = 0;
8830d7e0
SP		 1360 break;
1361 case Opt_nounix:
c18c842b 1362 vol->no_linux_ext = 1;
8830d7e0
SP		 1363 break;
1364 case Opt_nocase:
50c2f753 1365 vol->nocase = 1;
8830d7e0
SP		 1366 break;
1367 case Opt_brl:
c46fa8ac 1368 vol->nobrl = 0;
8830d7e0
SP		 1369 break;
1370 case Opt_nobrl:
c46fa8ac 1371 vol->nobrl = 1;
5cfdddcf
PS		 1372 /*
1373 * turn off mandatory locking in mode
8830d7e0 1374 * if remote locking is turned off since the
5cfdddcf
PS		 1375 * local vfs will do advisory
1376 */
50c2f753
SF		 1377 if (vol->file_mode ==
1378 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
d3485d37 1379 vol->file_mode = S_IALLUGO;
8830d7e0
SP		 1380 break;
1381 case Opt_forcemandatorylock:
13a6e42a 1382 vol->mand_lock = 1;
8830d7e0
SP		 1383 break;
1384 case Opt_setuids:
1da177e4 1385 vol->setuids = 1;
8830d7e0
SP		 1386 break;
1387 case Opt_nosetuids:
1da177e4 1388 vol->setuids = 0;
8830d7e0
SP		 1389 break;
1390 case Opt_dynperm:
d0a9c078 1391 vol->dynperm = true;
8830d7e0
SP		 1392 break;
1393 case Opt_nodynperm:
d0a9c078 1394 vol->dynperm = false;
8830d7e0
SP		 1395 break;
1396 case Opt_nohard:
1da177e4 1397 vol->retry = 0;
8830d7e0
SP		 1398 break;
1399 case Opt_nosoft:
1da177e4 1400 vol->retry = 1;
8830d7e0
SP		 1401 break;
1402 case Opt_nointr:
1da177e4 1403 vol->intr = 0;
8830d7e0
SP		 1404 break;
1405 case Opt_intr:
1da177e4 1406 vol->intr = 1;
8830d7e0
SP		 1407 break;
1408 case Opt_nostrictsync:
be652445 1409 vol->nostrictsync = 1;
8830d7e0
SP		 1410 break;
1411 case Opt_strictsync:
be652445 1412 vol->nostrictsync = 0;
8830d7e0
SP		 1413 break;
1414 case Opt_serverino:
1da177e4 1415 vol->server_ino = 1;
8830d7e0
SP		 1416 break;
1417 case Opt_noserverino:
1da177e4 1418 vol->server_ino = 0;
8830d7e0
SP		 1419 break;
1420 case Opt_rwpidforward:
d4ffff1f 1421 vol->rwpidforward = 1;
8830d7e0
SP		 1422 break;
1423 case Opt_cifsacl:
0a4b92c0 1424 vol->cifs_acl = 1;
8830d7e0
SP		 1425 break;
1426 case Opt_nocifsacl:
0a4b92c0 1427 vol->cifs_acl = 0;
8830d7e0
SP		 1428 break;
1429 case Opt_acl:
1da177e4 1430 vol->no_psx_acl = 0;
8830d7e0
SP		 1431 break;
1432 case Opt_noacl:
1da177e4 1433 vol->no_psx_acl = 1;
8830d7e0
SP		 1434 break;
1435 case Opt_locallease:
84210e91 1436 vol->local_lease = 1;
8830d7e0
SP		 1437 break;
1438 case Opt_sign:
1e3cc57e 1439 vol->sign = true;
8830d7e0
SP		 1440 break;
1441 case Opt_seal:
95b1cb90 1442 /* we do not do the following in secFlags because seal
8830d7e0
SP		 1443 * is a per tree connection (mount) not a per socket
1444 * or per-smb connection option in the protocol
1445 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1446 */
95b1cb90 1447 vol->seal = 1;
8830d7e0 1448 break;
8830d7e0 1449 case Opt_noac:
50c2f753
SF		 1450 printk(KERN_WARNING "CIFS: Mount option noac not "
1451 "supported. Instead set "
1452 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
8830d7e0
SP		 1453 break;
1454 case Opt_fsc:
607a569d 1455#ifndef CONFIG_CIFS_FSCACHE
f96637be 1456 cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
b946845a 1457 goto cifs_parse_mount_err;
607a569d 1458#endif
fa1df75d 1459 vol->fsc = true;
8830d7e0
SP		 1460 break;
1461 case Opt_mfsymlinks:
736a3320 1462 vol->mfsymlinks = true;
8830d7e0
SP		 1463 break;
1464 case Opt_multiuser:
0eb8a132 1465 vol->multiuser = true;
8830d7e0 1466 break;
d8162558
JL		 1467 case Opt_sloppy:
1468 sloppy = true;
1469 break;
a0b3df5c
JL		 1470 case Opt_nosharesock:
1471 vol->nosharesock = true;
1472 break;
8830d7e0
SP		 1473
1474 /* Numeric Values */
1475 case Opt_backupuid:
3da46565 1476 if (get_option_uid(args, &vol->backupuid)) {
f96637be
JP		 1477 cifs_dbg(VFS, "%s: Invalid backupuid value\n",
1478 __func__);
3d3ea8e6
SP		 1479 goto cifs_parse_mount_err;
1480 }
1481 vol->backupuid_specified = true;
8830d7e0
SP		 1482 break;
1483 case Opt_backupgid:
3da46565 1484 if (get_option_gid(args, &vol->backupgid)) {
f96637be
JP		 1485 cifs_dbg(VFS, "%s: Invalid backupgid value\n",
1486 __func__);
3d3ea8e6
SP		 1487 goto cifs_parse_mount_err;
1488 }
1489 vol->backupgid_specified = true;
8830d7e0
SP		 1490 break;
1491 case Opt_uid:
3da46565 1492 if (get_option_uid(args, &vol->linux_uid)) {
f96637be
JP		 1493 cifs_dbg(VFS, "%s: Invalid uid value\n",
1494 __func__);
8830d7e0
SP		 1495 goto cifs_parse_mount_err;
1496 }
8830d7e0
SP		 1497 uid_specified = true;
1498 break;
1499 case Opt_cruid:
3da46565 1500 if (get_option_uid(args, &vol->cred_uid)) {
f96637be
JP		 1501 cifs_dbg(VFS, "%s: Invalid cruid value\n",
1502 __func__);
8830d7e0
SP		 1503 goto cifs_parse_mount_err;
1504 }
8830d7e0
SP		 1505 break;
1506 case Opt_gid:
3da46565 1507 if (get_option_gid(args, &vol->linux_gid)) {
f96637be
JP		 1508 cifs_dbg(VFS, "%s: Invalid gid value\n",
1509 __func__);
8830d7e0
SP		 1510 goto cifs_parse_mount_err;
1511 }
8830d7e0
SP		 1512 gid_specified = true;
1513 break;
1514 case Opt_file_mode:
1515 if (get_option_ul(args, &option)) {
f96637be
JP		 1516 cifs_dbg(VFS, "%s: Invalid file_mode value\n",
1517 __func__);
8830d7e0
SP		 1518 goto cifs_parse_mount_err;
1519 }
1520 vol->file_mode = option;
1521 break;
1522 case Opt_dirmode:
1523 if (get_option_ul(args, &option)) {
f96637be
JP		 1524 cifs_dbg(VFS, "%s: Invalid dir_mode value\n",
1525 __func__);
8830d7e0
SP		 1526 goto cifs_parse_mount_err;
1527 }
1528 vol->dir_mode = option;
1529 break;
1530 case Opt_port:
b979aaa1
JL		 1531 if (get_option_ul(args, &option) ||
1532 option > USHRT_MAX) {
f96637be
JP		 1533 cifs_dbg(VFS, "%s: Invalid port value\n",
1534 __func__);
8830d7e0
SP		 1535 goto cifs_parse_mount_err;
1536 }
b979aaa1 1537 port = (unsigned short)option;
8830d7e0
SP		 1538 break;
1539 case Opt_rsize:
1540 if (get_option_ul(args, &option)) {
f96637be
JP		 1541 cifs_dbg(VFS, "%s: Invalid rsize value\n",
1542 __func__);
b946845a 1543 goto cifs_parse_mount_err;
8830d7e0
SP		 1544 }
1545 vol->rsize = option;
1546 break;
1547 case Opt_wsize:
1548 if (get_option_ul(args, &option)) {
f96637be
JP		 1549 cifs_dbg(VFS, "%s: Invalid wsize value\n",
1550 __func__);
8830d7e0
SP		 1551 goto cifs_parse_mount_err;
1552 }
1553 vol->wsize = option;
1554 break;
1555 case Opt_actimeo:
1556 if (get_option_ul(args, &option)) {
f96637be
JP		 1557 cifs_dbg(VFS, "%s: Invalid actimeo value\n",
1558 __func__);
8830d7e0
SP		 1559 goto cifs_parse_mount_err;
1560 }
1561 vol->actimeo = HZ * option;
1562 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
f96637be 1563 cifs_dbg(VFS, "attribute cache timeout too large\n");
8830d7e0
SP		 1564 goto cifs_parse_mount_err;
1565 }
1566 break;
1567
1568 /* String Arguments */
1569
4fe9e963
SP		 1570 case Opt_blank_user:
1571 /* null user, ie. anonymous authentication */
1572 vol->nullauth = 1;
1573 vol->username = NULL;
1574 break;
8830d7e0
SP		 1575 case Opt_user:
1576 string = match_strdup(args);
1577 if (string == NULL)
1578 goto out_nomem;
1579
8c3a2b4c
SL		 1580 if (strnlen(string, CIFS_MAX_USERNAME_LEN) >
1581 CIFS_MAX_USERNAME_LEN) {
8830d7e0
SP		 1582 printk(KERN_WARNING "CIFS: username too long\n");
1583 goto cifs_parse_mount_err;
1584 }
1585 vol->username = kstrdup(string, GFP_KERNEL);
f96637be 1586 if (!vol->username)
8830d7e0 1587 goto cifs_parse_mount_err;
8830d7e0
SP		 1588 break;
1589 case Opt_blank_pass:
8830d7e0
SP		 1590 /* passwords have to be handled differently
1591 * to allow the character used for deliminator
1592 * to be passed within them
1593 */
1594
c369c9a4
SP		 1595 /*
1596 * Check if this is a case where the password
1597 * starts with a delimiter
1598 */
1599 tmp_end = strchr(data, '=');
1600 tmp_end++;
1601 if (!(tmp_end < end && tmp_end[1] == delim)) {
1602 /* No it is not. Set the password to NULL */
1603 vol->password = NULL;
1604 break;
1605 }
1606 /* Yes it is. Drop down to Opt_pass below.*/
1607 case Opt_pass:
8830d7e0
SP		 1608 /* Obtain the value string */
1609 value = strchr(data, '=');
10238074 1610 value++;
8830d7e0
SP		 1611
1612 /* Set tmp_end to end of the string */
1613 tmp_end = (char *) value + strlen(value);
1614
1615 /* Check if following character is the deliminator
1616 * If yes, we have encountered a double deliminator
1617 * reset the NULL character to the deliminator
1618 */
e73f843a 1619 if (tmp_end < end && tmp_end[1] == delim) {
8830d7e0
SP		 1620 tmp_end[0] = delim;
1621
e73f843a
SJ		 1622 /* Keep iterating until we get to a single
1623 * deliminator OR the end
1624 */
1625 while ((tmp_end = strchr(tmp_end, delim))
1626 != NULL && (tmp_end[1] == delim)) {
1627 tmp_end = (char *) &tmp_end[2];
1628 }
1629
1630 /* Reset var options to point to next element */
1631 if (tmp_end) {
1632 tmp_end[0] = '\0';
1633 options = (char *) &tmp_end[1];
1634 } else
1635 /* Reached the end of the mount option
1636 * string */
1637 options = end;
8830d7e0
SP		 1638 }
1639
8830d7e0
SP		 1640 /* Now build new password string */
1641 temp_len = strlen(value);
1642 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1643 if (vol->password == NULL) {
1644 printk(KERN_WARNING "CIFS: no memory "
1645 "for password\n");
1646 goto cifs_parse_mount_err;
1647 }
1648
1649 for (i = 0, j = 0; i < temp_len; i++, j++) {
1650 vol->password[j] = value[i];
1651 if ((value[i] == delim) &&
1652 value[i+1] == delim)
1653 /* skip the second deliminator */
1654 i++;
1655 }
1656 vol->password[j] = '\0';
1657 break;
4fe9e963 1658 case Opt_blank_ip:
b979aaa1
JL		 1659 /* FIXME: should this be an error instead? */
1660 got_ip = false;
4fe9e963 1661 break;
8830d7e0
SP		 1662 case Opt_ip:
1663 string = match_strdup(args);
1664 if (string == NULL)
1665 goto out_nomem;
1666
b979aaa1
JL		 1667 if (!cifs_convert_address(dstaddr, string,
1668 strlen(string))) {
1669 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1670 string);
8830d7e0
SP		 1671 goto cifs_parse_mount_err;
1672 }
b979aaa1 1673 got_ip = true;
8830d7e0 1674 break;
8830d7e0
SP		 1675 case Opt_domain:
1676 string = match_strdup(args);
1677 if (string == NULL)
1678 goto out_nomem;
1679
057d6332
CG		 1680 if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN)
1681 == CIFS_MAX_DOMAINNAME_LEN) {
8830d7e0
SP		 1682 printk(KERN_WARNING "CIFS: domain name too"
1683 " long\n");
1684 goto cifs_parse_mount_err;
1685 }
1686
1687 vol->domainname = kstrdup(string, GFP_KERNEL);
1688 if (!vol->domainname) {
1689 printk(KERN_WARNING "CIFS: no memory "
1690 "for domainname\n");
1691 goto cifs_parse_mount_err;
1692 }
f96637be 1693 cifs_dbg(FYI, "Domain name set\n");
8830d7e0
SP		 1694 break;
1695 case Opt_srcaddr:
1696 string = match_strdup(args);
1697 if (string == NULL)
1698 goto out_nomem;
1699
4fe9e963 1700 if (!cifs_convert_address(
8830d7e0
SP		 1701 (struct sockaddr *)&vol->srcaddr,
1702 string, strlen(string))) {
1703 printk(KERN_WARNING "CIFS: Could not parse"
1704 " srcaddr: %s\n", string);
1705 goto cifs_parse_mount_err;
1706 }
1707 break;
8830d7e0
SP		 1708 case Opt_iocharset:
1709 string = match_strdup(args);
1710 if (string == NULL)
1711 goto out_nomem;
1712
4fe9e963 1713 if (strnlen(string, 1024) >= 65) {
8830d7e0
SP		 1714 printk(KERN_WARNING "CIFS: iocharset name "
1715 "too long.\n");
1716 goto cifs_parse_mount_err;
1717 }
1718
1719 if (strnicmp(string, "default", 7) != 0) {
1720 vol->iocharset = kstrdup(string,
1721 GFP_KERNEL);
1722 if (!vol->iocharset) {
1723 printk(KERN_WARNING "CIFS: no memory"
1724 "for charset\n");
1725 goto cifs_parse_mount_err;
1726 }
1727 }
1728 /* if iocharset not set then load_nls_default
1729 * is used by caller
1730 */
f96637be 1731 cifs_dbg(FYI, "iocharset set to %s\n", string);
8830d7e0 1732 break;
8830d7e0
SP		 1733 case Opt_netbiosname:
1734 string = match_strdup(args);
1735 if (string == NULL)
1736 goto out_nomem;
1737
8830d7e0
SP		 1738 memset(vol->source_rfc1001_name, 0x20,
1739 RFC1001_NAME_LEN);
1740 /*
1741 * FIXME: are there cases in which a comma can
1742 * be valid in workstation netbios name (and
1743 * need special handling)?
1744 */
1745 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1746 /* don't ucase netbiosname for user */
1747 if (string[i] == 0)
1748 break;
1749 vol->source_rfc1001_name[i] = string[i];
1750 }
1751 /* The string has 16th byte zero still from
1752 * set at top of the function
1753 */
1754 if (i == RFC1001_NAME_LEN && string[i] != 0)
1755 printk(KERN_WARNING "CIFS: netbiosname"
1756 " longer than 15 truncated.\n");
1757
1758 break;
1759 case Opt_servern:
1760 /* servernetbiosname specified override *SMBSERVER */
1761 string = match_strdup(args);
1762 if (string == NULL)
1763 goto out_nomem;
1764
8830d7e0
SP		 1765 /* last byte, type, is 0x20 for servr type */
1766 memset(vol->target_rfc1001_name, 0x20,
1767 RFC1001_NAME_LEN_WITH_NULL);
1768
1769 /* BB are there cases in which a comma can be
1770 valid in this workstation netbios name
1771 (and need special handling)? */
1772
1773 /* user or mount helper must uppercase the
1774 netbios name */
1775 for (i = 0; i < 15; i++) {
1776 if (string[i] == 0)
1777 break;
1778 vol->target_rfc1001_name[i] = string[i];
1779 }
1780 /* The string has 16th byte zero still from
1781 set at top of the function */
1782 if (i == RFC1001_NAME_LEN && string[i] != 0)
1783 printk(KERN_WARNING "CIFS: server net"
1784 "biosname longer than 15 truncated.\n");
1785 break;
1786 case Opt_ver:
1787 string = match_strdup(args);
1788 if (string == NULL)
1789 goto out_nomem;
1790
5249af32 1791 if (strnicmp(string, "1", 1) == 0) {
8830d7e0
SP		 1792 /* This is the default */
1793 break;
1794 }
1795 /* For all other value, error */
1796 printk(KERN_WARNING "CIFS: Invalid version"
1797 " specified\n");
b946845a 1798 goto cifs_parse_mount_err;
23db65f5
JL		 1799 case Opt_vers:
1800 string = match_strdup(args);
1801 if (string == NULL)
1802 goto out_nomem;
1803
1804 if (cifs_parse_smb_version(string, vol) != 0)
1805 goto cifs_parse_mount_err;
1806 break;
8830d7e0
SP		 1807 case Opt_sec:
1808 string = match_strdup(args);
1809 if (string == NULL)
1810 goto out_nomem;
1811
8830d7e0
SP		 1812 if (cifs_parse_security_flavors(string, vol) != 0)
1813 goto cifs_parse_mount_err;
1814 break;
15b6a473
JL		 1815 case Opt_cache:
1816 string = match_strdup(args);
1817 if (string == NULL)
1818 goto out_nomem;
1819
1820 if (cifs_parse_cache_flavor(string, vol) != 0)
1821 goto cifs_parse_mount_err;
1822 break;
8830d7e0 1823 default:
d8162558
JL		 1824 /*
1825 * An option we don't recognize. Save it off for later
1826 * if we haven't already found one
1827 */
1828 if (!invalid)
1829 invalid = data;
8830d7e0 1830 break;
1da177e4 1831 }
8830d7e0
SP		 1832 /* Free up any allocated string */
1833 kfree(string);
1834 string = NULL;
1da177e4 1835 }
0eb8a132 1836
d8162558
JL		 1837 if (!sloppy && invalid) {
1838 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1839 goto cifs_parse_mount_err;
1840 }
1841
8a8798a5
JL		 1842#ifndef CONFIG_KEYS
1843 /* Muliuser mounts require CONFIG_KEYS support */
1844 if (vol->multiuser) {
f96637be 1845 cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
b946845a 1846 goto cifs_parse_mount_err;
0eb8a132 1847 }
8a8798a5 1848#endif
e5e69abd 1849 if (!vol->UNC) {
37d4f99b 1850 cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n");
e5e69abd
JL		 1851 goto cifs_parse_mount_err;
1852 }
0eb8a132 1853
62a1a439
JL		 1854 /* make sure UNC has a share name */
1855 if (!strchr(vol->UNC + 3, '\\')) {
f96637be 1856 cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n");
62a1a439
JL		 1857 goto cifs_parse_mount_err;
1858 }
1859
b979aaa1
JL		 1860 if (!got_ip) {
1861 /* No ip= option specified? Try to get it from UNC */
1862 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1863 strlen(&vol->UNC[2]))) {
1864 printk(KERN_ERR "Unable to determine destination "
1865 "address.\n");
1866 goto cifs_parse_mount_err;
1867 }
1868 }
1869
1870 /* set the port that we got earlier */
1871 cifs_set_port(dstaddr, port);
1da177e4 1872
9b9d6b24
JL		 1873 if (uid_specified)
1874 vol->override_uid = override_uid;
1875 else if (override_uid == 1)
1876 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1877 "specified with no uid= option.\n");
1878
1879 if (gid_specified)
1880 vol->override_gid = override_gid;
1881 else if (override_gid == 1)
1882 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1883 "specified with no gid= option.\n");
1884
b946845a 1885 kfree(mountdata_copy);
1da177e4 1886 return 0;
b946845a 1887
8830d7e0
SP		 1888out_nomem:
1889 printk(KERN_WARNING "Could not allocate temporary buffer\n");
b946845a 1890cifs_parse_mount_err:
8830d7e0 1891 kfree(string);
b946845a
SF		 1892 kfree(mountdata_copy);
1893 return 1;
1da177e4
LT		 1894}
1895
3eb9a889
BG		 1896/** Returns true if srcaddr isn't specified and rhs isn't
1897 * specified, or if srcaddr is specified and
1898 * matches the IP address of the rhs argument.
1899 */
1900static bool
1901srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1902{
1903 switch (srcaddr->sa_family) {
1904 case AF_UNSPEC:
1905 return (rhs->sa_family == AF_UNSPEC);
1906 case AF_INET: {
1907 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1908 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1909 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1910 }
1911 case AF_INET6: {
1912 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
e3e2775c 1913 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
3eb9a889
BG		 1914 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1915 }
1916 default:
1917 WARN_ON(1);
1918 return false; /* don't expect to be here */
1919 }
1920}
1921
4b886136
PS		 1922/*
1923 * If no port is specified in addr structure, we try to match with 445 port
1924 * and if it fails - with 139 ports. It should be called only if address
1925 * families of server and addr are equal.
1926 */
1927static bool
1928match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1929{
6da97910 1930 __be16 port, *sport;
4b886136
PS		 1931
1932 switch (addr->sa_family) {
1933 case AF_INET:
1934 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1935 port = ((struct sockaddr_in *) addr)->sin_port;
1936 break;
1937 case AF_INET6:
1938 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1939 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1940 break;
1941 default:
1942 WARN_ON(1);
1943 return false;
1944 }
1945
1946 if (!port) {
1947 port = htons(CIFS_PORT);
1948 if (port == *sport)
1949 return true;
1950
1951 port = htons(RFC1001_PORT);
1952 }
1953
1954 return port == *sport;
1955}
3eb9a889 1956
4515148e 1957static bool
3eb9a889
BG		 1958match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1959 struct sockaddr *srcaddr)
4515148e 1960{
4515148e 1961 switch (addr->sa_family) {
a9f1b85e
PS		 1962 case AF_INET: {
1963 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1964 struct sockaddr_in *srv_addr4 =
1965 (struct sockaddr_in *)&server->dstaddr;
1966
1967 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
4515148e 1968 return false;
4515148e 1969 break;
a9f1b85e
PS		 1970 }
1971 case AF_INET6: {
1972 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1973 struct sockaddr_in6 *srv_addr6 =
1974 (struct sockaddr_in6 *)&server->dstaddr;
1975
4515148e 1976 if (!ipv6_addr_equal(&addr6->sin6_addr,
a9f1b85e 1977 &srv_addr6->sin6_addr))
4515148e 1978 return false;
a9f1b85e 1979 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
4515148e 1980 return false;
4515148e
JL		 1981 break;
1982 }
a9f1b85e
PS		 1983 default:
1984 WARN_ON(1);
1985 return false; /* don't expect to be here */
1986 }
4515148e 1987
3eb9a889
BG		 1988 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1989 return false;
1990
4515148e
JL		 1991 return true;
1992}
1993
daf5b0b6
JL		 1994static bool
1995match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1996{
3f618223
JL		 1997 /*
1998 * The select_sectype function should either return the vol->sectype
1999 * that was specified, or "Unspecified" if that sectype was not
2000 * compatible with the given NEGOTIATE request.
2001 */
2002 if (select_sectype(server, vol->sectype) == Unspecified)
daf5b0b6 2003 return false;
daf5b0b6 2004
3f618223
JL		 2005 /*
2006 * Now check if signing mode is acceptable. No need to check
2007 * global_secflags at this point since if MUST_SIGN is set then
2008 * the server->sign had better be too.
2009 */
38d77c50
JL		 2010 if (vol->sign && !server->sign)
2011 return false;
daf5b0b6
JL		 2012
2013 return true;
2014}
2015
9fa114f7 2016static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
37bb04e5 2017{
9fa114f7
JL		 2018 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2019
a0b3df5c
JL		 2020 if (vol->nosharesock)
2021 return 0;
2022
23db65f5
JL		 2023 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2024 return 0;
2025
37bb04e5
PS		 2026 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2027 return 0;
2028
2029 if (!match_address(server, addr,
2030 (struct sockaddr *)&vol->srcaddr))
2031 return 0;
2032
2033 if (!match_port(server, addr))
2034 return 0;
2035
2036 if (!match_security(server, vol))
2037 return 0;
2038
2039 return 1;
2040}
2041
e7ddee90 2042static struct TCP_Server_Info *
9fa114f7 2043cifs_find_tcp_session(struct smb_vol *vol)
1da177e4 2044{
e7ddee90 2045 struct TCP_Server_Info *server;
e7ddee90 2046
3f9bcca7 2047 spin_lock(&cifs_tcp_ses_lock);
4515148e 2048 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
9fa114f7 2049 if (!match_server(server, vol))
daf5b0b6
JL		 2050 continue;
2051
e7ddee90 2052 ++server->srv_count;
3f9bcca7 2053 spin_unlock(&cifs_tcp_ses_lock);
f96637be 2054 cifs_dbg(FYI, "Existing tcp session with server found\n");
e7ddee90 2055 return server;
1da177e4 2056 }
3f9bcca7 2057 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2058 return NULL;
2059}
1b20d672 2060
14fbf50d 2061static void
e7ddee90 2062cifs_put_tcp_session(struct TCP_Server_Info *server)
1da177e4 2063{
e7ddee90 2064 struct task_struct *task;
1b20d672 2065
3f9bcca7 2066 spin_lock(&cifs_tcp_ses_lock);
e7ddee90 2067 if (--server->srv_count > 0) {
3f9bcca7 2068 spin_unlock(&cifs_tcp_ses_lock);
e7ddee90 2069 return;
1da177e4 2070 }
1b20d672 2071
f1d0c998
RL		 2072 put_net(cifs_net_ns(server));
2073
e7ddee90 2074 list_del_init(&server->tcp_ses_list);
3f9bcca7 2075 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2076
c74093b6
JL		 2077 cancel_delayed_work_sync(&server->echo);
2078
e7ddee90
JL		 2079 spin_lock(&GlobalMid_Lock);
2080 server->tcpStatus = CifsExiting;
2081 spin_unlock(&GlobalMid_Lock);
dea570e0 2082
d2b91521 2083 cifs_crypto_shash_release(server);
488f1d2d
SJ		 2084 cifs_fscache_release_client_cookie(server);
2085
21e73393
SP		 2086 kfree(server->session_key.response);
2087 server->session_key.response = NULL;
2088 server->session_key.len = 0;
2089
e7ddee90
JL		 2090 task = xchg(&server->tsk, NULL);
2091 if (task)
2092 force_sig(SIGKILL, task);
1da177e4
LT		 2093}
2094
63c038c2
JL		 2095static struct TCP_Server_Info *
2096cifs_get_tcp_session(struct smb_vol *volume_info)
2097{
2098 struct TCP_Server_Info *tcp_ses = NULL;
63c038c2
JL		 2099 int rc;
2100
f96637be 2101 cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC);
63c038c2
JL		 2102
2103 /* see if we already have a matching tcp_ses */
9fa114f7 2104 tcp_ses = cifs_find_tcp_session(volume_info);
63c038c2
JL		 2105 if (tcp_ses)
2106 return tcp_ses;
2107
2108 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2109 if (!tcp_ses) {
2110 rc = -ENOMEM;
2111 goto out_err;
2112 }
2113
23db65f5
JL		 2114 tcp_ses->ops = volume_info->ops;
2115 tcp_ses->vals = volume_info->vals;
f1d0c998 2116 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
63c038c2
JL		 2117 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2118 if (IS_ERR(tcp_ses->hostname)) {
2119 rc = PTR_ERR(tcp_ses->hostname);
f7c5445a 2120 goto out_err_crypto_release;
63c038c2
JL		 2121 }
2122
2123 tcp_ses->noblocksnd = volume_info->noblocksnd;
2124 tcp_ses->noautotune = volume_info->noautotune;
6a5fa236 2125 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
fc40f9cf 2126 tcp_ses->in_flight = 0;
2d86dbc9 2127 tcp_ses->credits = 1;
63c038c2
JL		 2128 init_waitqueue_head(&tcp_ses->response_q);
2129 init_waitqueue_head(&tcp_ses->request_q);
2130 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2131 mutex_init(&tcp_ses->srv_mutex);
2132 memcpy(tcp_ses->workstation_RFC1001_name,
2133 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2134 memcpy(tcp_ses->server_RFC1001_name,
2135 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
5d0d2882 2136 tcp_ses->session_estab = false;
63c038c2 2137 tcp_ses->sequence_number = 0;
fda35943 2138 tcp_ses->lstrp = jiffies;
58fa015f 2139 spin_lock_init(&tcp_ses->req_lock);
63c038c2
JL		 2140 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2141 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
c74093b6 2142 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
9fa114f7
JL		 2143 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2144 sizeof(tcp_ses->srcaddr));
2145 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2146 sizeof(tcp_ses->dstaddr));
63c038c2
JL		 2147 /*
2148 * at this point we are the only ones with the pointer
2149 * to the struct since the kernel thread not created yet
2150 * no need to spinlock this init of tcpStatus or srv_count
2151 */
2152 tcp_ses->tcpStatus = CifsNew;
2153 ++tcp_ses->srv_count;
2154
a9f1b85e 2155 rc = ip_connect(tcp_ses);
63c038c2 2156 if (rc < 0) {
f96637be 2157 cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
f7c5445a 2158 goto out_err_crypto_release;
63c038c2
JL		 2159 }
2160
2161 /*
2162 * since we're in a cifs function already, we know that
2163 * this will succeed. No need for try_module_get().
2164 */
2165 __module_get(THIS_MODULE);
7c97c200 2166 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
63c038c2
JL		 2167 tcp_ses, "cifsd");
2168 if (IS_ERR(tcp_ses->tsk)) {
2169 rc = PTR_ERR(tcp_ses->tsk);
f96637be 2170 cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
63c038c2 2171 module_put(THIS_MODULE);
f7c5445a 2172 goto out_err_crypto_release;
63c038c2 2173 }
fd88ce93 2174 tcp_ses->tcpStatus = CifsNeedNegotiate;
63c038c2
JL		 2175
2176 /* thread spawned, put it on the list */
3f9bcca7 2177 spin_lock(&cifs_tcp_ses_lock);
63c038c2 2178 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
3f9bcca7 2179 spin_unlock(&cifs_tcp_ses_lock);
63c038c2 2180
488f1d2d
SJ		 2181 cifs_fscache_get_client_cookie(tcp_ses);
2182
c74093b6 2183 /* queue echo request delayed work */
da472fc8 2184 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
c74093b6 2185
63c038c2
JL		 2186 return tcp_ses;
2187
f7c5445a 2188out_err_crypto_release:
d2b91521
SP		 2189 cifs_crypto_shash_release(tcp_ses);
2190
f1d0c998
RL		 2191 put_net(cifs_net_ns(tcp_ses));
2192
63c038c2
JL		 2193out_err:
2194 if (tcp_ses) {
8347a5cd
SF		 2195 if (!IS_ERR(tcp_ses->hostname))
2196 kfree(tcp_ses->hostname);
63c038c2
JL		 2197 if (tcp_ses->ssocket)
2198 sock_release(tcp_ses->ssocket);
2199 kfree(tcp_ses);
2200 }
2201 return ERR_PTR(rc);
2202}
2203
96daf2b0 2204static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
37bb04e5 2205{
3f618223
JL		 2206 if (vol->sectype != Unspecified &&
2207 vol->sectype != ses->sectype)
2208 return 0;
2209
2210 switch (ses->sectype) {
37bb04e5 2211 case Kerberos:
64ed39dd 2212 if (!uid_eq(vol->cred_uid, ses->cred_uid))
37bb04e5
PS		 2213 return 0;
2214 break;
2215 default:
04febabc
JL		 2216 /* NULL username means anonymous session */
2217 if (ses->user_name == NULL) {
2218 if (!vol->nullauth)
2219 return 0;
2220 break;
2221 }
2222
37bb04e5 2223 /* anything else takes username/password */
04febabc
JL		 2224 if (strncmp(ses->user_name,
2225 vol->username ? vol->username : "",
8c3a2b4c 2226 CIFS_MAX_USERNAME_LEN))
37bb04e5
PS		 2227 return 0;
2228 if (strlen(vol->username) != 0 &&
2229 ses->password != NULL &&
2230 strncmp(ses->password,
2231 vol->password ? vol->password : "",
8c3a2b4c 2232 CIFS_MAX_PASSWORD_LEN))
37bb04e5
PS		 2233 return 0;
2234 }
2235 return 1;
2236}
2237
96daf2b0 2238static struct cifs_ses *
4ff67b72 2239cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1da177e4 2240{
96daf2b0 2241 struct cifs_ses *ses;
dea570e0 2242
3f9bcca7 2243 spin_lock(&cifs_tcp_ses_lock);
4ff67b72 2244 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
37bb04e5
PS		 2245 if (!match_session(ses, vol))
2246 continue;
14fbf50d 2247 ++ses->ses_count;
3f9bcca7 2248 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2249 return ses;
2250 }
3f9bcca7 2251 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2252 return NULL;
2253}
dea570e0 2254
14fbf50d 2255static void
96daf2b0 2256cifs_put_smb_ses(struct cifs_ses *ses)
14fbf50d 2257{
58c45c58 2258 unsigned int xid;
14fbf50d 2259 struct TCP_Server_Info *server = ses->server;
dea570e0 2260
f96637be 2261 cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
3f9bcca7 2262 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 2263 if (--ses->ses_count > 0) {
3f9bcca7 2264 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2265 return;
2266 }
dea570e0 2267
14fbf50d 2268 list_del_init(&ses->smb_ses_list);
3f9bcca7 2269 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2270
58c45c58 2271 if (ses->status == CifsGood && server->ops->logoff) {
6d5786a3 2272 xid = get_xid();
58c45c58 2273 server->ops->logoff(xid, ses);
6d5786a3 2274 _free_xid(xid);
14fbf50d
JL		 2275 }
2276 sesInfoFree(ses);
2277 cifs_put_tcp_session(server);
2278}
dea570e0 2279
8a8798a5
JL		 2280#ifdef CONFIG_KEYS
2281
057d6332
CG		 2282/* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
2283#define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
8a8798a5
JL		 2284
2285/* Populate username and pw fields from keyring if possible */
2286static int
2287cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2288{
2289 int rc = 0;
2290 char *desc, *delim, *payload;
2291 ssize_t len;
2292 struct key *key;
2293 struct TCP_Server_Info *server = ses->server;
2294 struct sockaddr_in *sa;
2295 struct sockaddr_in6 *sa6;
2296 struct user_key_payload *upayload;
2297
2298 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2299 if (!desc)
2300 return -ENOMEM;
2301
2302 /* try to find an address key first */
2303 switch (server->dstaddr.ss_family) {
2304 case AF_INET:
2305 sa = (struct sockaddr_in *)&server->dstaddr;
2306 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2307 break;
2308 case AF_INET6:
2309 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2310 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2311 break;
2312 default:
f96637be
JP		 2313 cifs_dbg(FYI, "Bad ss_family (%hu)\n",
2314 server->dstaddr.ss_family);
8a8798a5
JL		 2315 rc = -EINVAL;
2316 goto out_err;
2317 }
2318
f96637be 2319 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
8a8798a5
JL		 2320 key = request_key(&key_type_logon, desc, "");
2321 if (IS_ERR(key)) {
2322 if (!ses->domainName) {
f96637be 2323 cifs_dbg(FYI, "domainName is NULL\n");
8a8798a5
JL		 2324 rc = PTR_ERR(key);
2325 goto out_err;
2326 }
2327
2328 /* didn't work, try to find a domain key */
2329 sprintf(desc, "cifs:d:%s", ses->domainName);
f96637be 2330 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
8a8798a5
JL		 2331 key = request_key(&key_type_logon, desc, "");
2332 if (IS_ERR(key)) {
2333 rc = PTR_ERR(key);
2334 goto out_err;
2335 }
2336 }
2337
2338 down_read(&key->sem);
2339 upayload = key->payload.data;
2340 if (IS_ERR_OR_NULL(upayload)) {
4edc53c1 2341 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
8a8798a5
JL		 2342 goto out_key_put;
2343 }
2344
2345 /* find first : in payload */
2346 payload = (char *)upayload->data;
2347 delim = strnchr(payload, upayload->datalen, ':');
f96637be 2348 cifs_dbg(FYI, "payload=%s\n", payload);
8a8798a5 2349 if (!delim) {
f96637be
JP		 2350 cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
2351 upayload->datalen);
8a8798a5
JL		 2352 rc = -EINVAL;
2353 goto out_key_put;
2354 }
2355
2356 len = delim - payload;
8c3a2b4c 2357 if (len > CIFS_MAX_USERNAME_LEN || len <= 0) {
f96637be
JP		 2358 cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
2359 len);
8a8798a5
JL		 2360 rc = -EINVAL;
2361 goto out_key_put;
2362 }
2363
2364 vol->username = kstrndup(payload, len, GFP_KERNEL);
2365 if (!vol->username) {
f96637be
JP		 2366 cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
2367 len);
8a8798a5
JL		 2368 rc = -ENOMEM;
2369 goto out_key_put;
2370 }
f96637be 2371 cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
8a8798a5
JL		 2372
2373 len = key->datalen - (len + 1);
8c3a2b4c 2374 if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) {
f96637be 2375 cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
8a8798a5
JL		 2376 rc = -EINVAL;
2377 kfree(vol->username);
2378 vol->username = NULL;
2379 goto out_key_put;
2380 }
2381
2382 ++delim;
2383 vol->password = kstrndup(delim, len, GFP_KERNEL);
2384 if (!vol->password) {
f96637be
JP		 2385 cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
2386 len);
8a8798a5
JL		 2387 rc = -ENOMEM;
2388 kfree(vol->username);
2389 vol->username = NULL;
2390 goto out_key_put;
2391 }
2392
2393out_key_put:
2394 up_read(&key->sem);
2395 key_put(key);
2396out_err:
2397 kfree(desc);
f96637be 2398 cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
8a8798a5
JL		 2399 return rc;
2400}
2401#else /* ! CONFIG_KEYS */
2402static inline int
2403cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2404 struct cifs_ses *ses __attribute__((unused)))
2405{
2406 return -ENOSYS;
2407}
2408#endif /* CONFIG_KEYS */
2409
96daf2b0 2410static struct cifs_ses *
36988c76
JL		 2411cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2412{
286170aa
PS		 2413 int rc = -ENOMEM;
2414 unsigned int xid;
96daf2b0 2415 struct cifs_ses *ses;
a9f1b85e
PS		 2416 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2417 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
36988c76 2418
6d5786a3 2419 xid = get_xid();
36988c76 2420
4ff67b72 2421 ses = cifs_find_smb_ses(server, volume_info);
36988c76 2422 if (ses) {
f96637be
JP		 2423 cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
2424 ses->status);
36988c76 2425
36988c76 2426 mutex_lock(&ses->session_mutex);
198b5682
JL		 2427 rc = cifs_negotiate_protocol(xid, ses);
2428 if (rc) {
2429 mutex_unlock(&ses->session_mutex);
2430 /* problem -- put our ses reference */
2431 cifs_put_smb_ses(ses);
6d5786a3 2432 free_xid(xid);
198b5682
JL		 2433 return ERR_PTR(rc);
2434 }
36988c76 2435 if (ses->need_reconnect) {
f96637be 2436 cifs_dbg(FYI, "Session needs reconnect\n");
36988c76
JL		 2437 rc = cifs_setup_session(xid, ses,
2438 volume_info->local_nls);
2439 if (rc) {
2440 mutex_unlock(&ses->session_mutex);
2441 /* problem -- put our reference */
2442 cifs_put_smb_ses(ses);
6d5786a3 2443 free_xid(xid);
36988c76
JL		 2444 return ERR_PTR(rc);
2445 }
2446 }
2447 mutex_unlock(&ses->session_mutex);
460cf341
JL		 2448
2449 /* existing SMB ses has a server reference already */
2450 cifs_put_tcp_session(server);
6d5786a3 2451 free_xid(xid);
36988c76
JL		 2452 return ses;
2453 }
2454
f96637be 2455 cifs_dbg(FYI, "Existing smb sess not found\n");
36988c76
JL		 2456 ses = sesInfoAlloc();
2457 if (ses == NULL)
2458 goto get_ses_fail;
2459
2460 /* new SMB session uses our server ref */
2461 ses->server = server;
a9f1b85e
PS		 2462 if (server->dstaddr.ss_family == AF_INET6)
2463 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
36988c76 2464 else
a9f1b85e 2465 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
36988c76 2466
8727c8a8
SF		 2467 if (volume_info->username) {
2468 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2469 if (!ses->user_name)
2470 goto get_ses_fail;
2471 }
36988c76
JL		 2472
2473 /* volume_info->password freed at unmount */
2474 if (volume_info->password) {
2475 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2476 if (!ses->password)
2477 goto get_ses_fail;
2478 }
2479 if (volume_info->domainname) {
d3686d54
SP		 2480 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2481 if (!ses->domainName)
2482 goto get_ses_fail;
36988c76 2483 }
3e4b3e1f 2484 ses->cred_uid = volume_info->cred_uid;
36988c76 2485 ses->linux_uid = volume_info->linux_uid;
d9b94201 2486
28e11bd8
JL		 2487 ses->sectype = volume_info->sectype;
2488 ses->sign = volume_info->sign;
36988c76
JL		 2489
2490 mutex_lock(&ses->session_mutex);
198b5682
JL		 2491 rc = cifs_negotiate_protocol(xid, ses);
2492 if (!rc)
2493 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
36988c76 2494 mutex_unlock(&ses->session_mutex);
c8e56f1f 2495 if (rc)
36988c76
JL		 2496 goto get_ses_fail;
2497
2498 /* success, put it on the list */
3f9bcca7 2499 spin_lock(&cifs_tcp_ses_lock);
36988c76 2500 list_add(&ses->smb_ses_list, &server->smb_ses_list);
3f9bcca7 2501 spin_unlock(&cifs_tcp_ses_lock);
36988c76 2502
6d5786a3 2503 free_xid(xid);
36988c76
JL		 2504 return ses;
2505
2506get_ses_fail:
2507 sesInfoFree(ses);
6d5786a3 2508 free_xid(xid);
36988c76
JL		 2509 return ERR_PTR(rc);
2510}
2511
96daf2b0 2512static int match_tcon(struct cifs_tcon *tcon, const char *unc)
37bb04e5
PS		 2513{
2514 if (tcon->tidStatus == CifsExiting)
2515 return 0;
2516 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2517 return 0;
2518 return 1;
2519}
2520
96daf2b0
SF		 2521static struct cifs_tcon *
2522cifs_find_tcon(struct cifs_ses *ses, const char *unc)
f1987b44
JL		 2523{
2524 struct list_head *tmp;
96daf2b0 2525 struct cifs_tcon *tcon;
f1987b44 2526
3f9bcca7 2527 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2528 list_for_each(tmp, &ses->tcon_list) {
96daf2b0 2529 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
37bb04e5 2530 if (!match_tcon(tcon, unc))
f1987b44 2531 continue;
f1987b44 2532 ++tcon->tc_count;
3f9bcca7 2533 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2534 return tcon;
1da177e4 2535 }
3f9bcca7 2536 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2537 return NULL;
2538}
2539
f1987b44 2540static void
96daf2b0 2541cifs_put_tcon(struct cifs_tcon *tcon)
f1987b44 2542{
2e6e02ab 2543 unsigned int xid;
96daf2b0 2544 struct cifs_ses *ses = tcon->ses;
f1987b44 2545
f96637be 2546 cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
3f9bcca7 2547 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2548 if (--tcon->tc_count > 0) {
3f9bcca7 2549 spin_unlock(&cifs_tcp_ses_lock);
f1987b44
JL		 2550 return;
2551 }
2552
2553 list_del_init(&tcon->tcon_list);
3f9bcca7 2554 spin_unlock(&cifs_tcp_ses_lock);
f1987b44 2555
6d5786a3 2556 xid = get_xid();
2e6e02ab
PS		 2557 if (ses->server->ops->tree_disconnect)
2558 ses->server->ops->tree_disconnect(xid, tcon);
6d5786a3 2559 _free_xid(xid);
f1987b44 2560
d03382ce 2561 cifs_fscache_release_super_cookie(tcon);
9f841593 2562 tconInfoFree(tcon);
f1987b44
JL		 2563 cifs_put_smb_ses(ses);
2564}
2565
96daf2b0
SF		 2566static struct cifs_tcon *
2567cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
d00c28de
JL		 2568{
2569 int rc, xid;
96daf2b0 2570 struct cifs_tcon *tcon;
d00c28de
JL		 2571
2572 tcon = cifs_find_tcon(ses, volume_info->UNC);
2573 if (tcon) {
f96637be 2574 cifs_dbg(FYI, "Found match on UNC path\n");
d00c28de
JL		 2575 /* existing tcon already has a reference */
2576 cifs_put_smb_ses(ses);
2577 if (tcon->seal != volume_info->seal)
f96637be 2578 cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
d00c28de
JL		 2579 return tcon;
2580 }
2581
2e6e02ab
PS		 2582 if (!ses->server->ops->tree_connect) {
2583 rc = -ENOSYS;
2584 goto out_fail;
2585 }
2586
d00c28de
JL		 2587 tcon = tconInfoAlloc();
2588 if (tcon == NULL) {
2589 rc = -ENOMEM;
2590 goto out_fail;
2591 }
2592
2593 tcon->ses = ses;
2594 if (volume_info->password) {
2595 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2596 if (!tcon->password) {
2597 rc = -ENOMEM;
2598 goto out_fail;
2599 }
2600 }
2601
2e6e02ab
PS		 2602 /*
2603 * BB Do we need to wrap session_mutex around this TCon call and Unix
2604 * SetFS as we do on SessSetup and reconnect?
2605 */
6d5786a3 2606 xid = get_xid();
2e6e02ab
PS		 2607 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2608 volume_info->local_nls);
6d5786a3 2609 free_xid(xid);
f96637be 2610 cifs_dbg(FYI, "Tcon rc = %d\n", rc);
d00c28de
JL		 2611 if (rc)
2612 goto out_fail;
2613
2614 if (volume_info->nodfs) {
2615 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
f96637be 2616 cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
d00c28de
JL		 2617 }
2618 tcon->seal = volume_info->seal;
2e6e02ab
PS		 2619 /*
2620 * We can have only one retry value for a connection to a share so for
2621 * resources mounted more than once to the same server share the last
2622 * value passed in for the retry flag is used.
2623 */
d00c28de
JL		 2624 tcon->retry = volume_info->retry;
2625 tcon->nocase = volume_info->nocase;
2626 tcon->local_lease = volume_info->local_lease;
233839b1 2627 INIT_LIST_HEAD(&tcon->pending_opens);
d00c28de 2628
3f9bcca7 2629 spin_lock(&cifs_tcp_ses_lock);
d00c28de 2630 list_add(&tcon->tcon_list, &ses->tcon_list);
3f9bcca7 2631 spin_unlock(&cifs_tcp_ses_lock);
d00c28de 2632
d03382ce
SJ		 2633 cifs_fscache_get_super_cookie(tcon);
2634
d00c28de
JL		 2635 return tcon;
2636
2637out_fail:
2638 tconInfoFree(tcon);
2639 return ERR_PTR(rc);
2640}
2641
9d002df4
JL		 2642void
2643cifs_put_tlink(struct tcon_link *tlink)
2644{
2645 if (!tlink || IS_ERR(tlink))
2646 return;
2647
2648 if (!atomic_dec_and_test(&tlink->tl_count) ||
2649 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2650 tlink->tl_time = jiffies;
2651 return;
2652 }
2653
2654 if (!IS_ERR(tlink_tcon(tlink)))
2655 cifs_put_tcon(tlink_tcon(tlink));
2656 kfree(tlink);
2657 return;
2658}
d00c28de 2659
25c7f41e 2660static inline struct tcon_link *
cd51875d
PS		 2661cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2662{
2663 return cifs_sb->master_tlink;
2664}
25c7f41e
PS		 2665
2666static int
2667compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2668{
2669 struct cifs_sb_info *old = CIFS_SB(sb);
2670 struct cifs_sb_info *new = mnt_data->cifs_sb;
2671
2672 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2673 return 0;
2674
2675 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2676 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2677 return 0;
2678
25c7f41e 2679 /*
5eba8ab3
JL		 2680 * We want to share sb only if we don't specify an r/wsize or
2681 * specified r/wsize is greater than or equal to existing one.
25c7f41e
PS		 2682 */
2683 if (new->wsize && new->wsize < old->wsize)
2684 return 0;
2685
5eba8ab3
JL		 2686 if (new->rsize && new->rsize < old->rsize)
2687 return 0;
2688
1f68233c 2689 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
25c7f41e
PS		 2690 return 0;
2691
2692 if (old->mnt_file_mode != new->mnt_file_mode ||
2693 old->mnt_dir_mode != new->mnt_dir_mode)
2694 return 0;
2695
2696 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2697 return 0;
2698
2699 if (old->actimeo != new->actimeo)
2700 return 0;
2701
2702 return 1;
2703}
2704
2705int
2706cifs_match_super(struct super_block *sb, void *data)
2707{
2708 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2709 struct smb_vol *volume_info;
2710 struct cifs_sb_info *cifs_sb;
2711 struct TCP_Server_Info *tcp_srv;
96daf2b0
SF		 2712 struct cifs_ses *ses;
2713 struct cifs_tcon *tcon;
25c7f41e 2714 struct tcon_link *tlink;
25c7f41e
PS		 2715 int rc = 0;
2716
25c7f41e
PS		 2717 spin_lock(&cifs_tcp_ses_lock);
2718 cifs_sb = CIFS_SB(sb);
2719 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2720 if (IS_ERR(tlink)) {
2721 spin_unlock(&cifs_tcp_ses_lock);
2722 return rc;
2723 }
2724 tcon = tlink_tcon(tlink);
2725 ses = tcon->ses;
2726 tcp_srv = ses->server;
2727
2728 volume_info = mnt_data->vol;
2729
9fa114f7 2730 if (!match_server(tcp_srv, volume_info) ||
25c7f41e
PS		 2731 !match_session(ses, volume_info) ||
2732 !match_tcon(tcon, volume_info->UNC)) {
2733 rc = 0;
2734 goto out;
2735 }
2736
2737 rc = compare_mount_options(sb, mnt_data);
2738out:
25c7f41e 2739 spin_unlock(&cifs_tcp_ses_lock);
f484b5d0 2740 cifs_put_tlink(tlink);
25c7f41e
PS		 2741 return rc;
2742}
2743
1da177e4 2744int
b669f33c 2745get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2e6e02ab
PS		 2746 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2747 struct dfs_info3_param **referrals, int remap)
1da177e4
LT		 2748{
2749 char *temp_unc;
2750 int rc = 0;
2751
b669f33c 2752 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2e6e02ab
PS		 2753 return -ENOSYS;
2754
2755 *num_referrals = 0;
2756 *referrals = NULL;
1da177e4 2757
2e6e02ab 2758 if (ses->ipc_tid == 0) {
1da177e4 2759 temp_unc = kmalloc(2 /* for slashes */ +
2e6e02ab
PS		 2760 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2761 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
1da177e4
LT		 2762 if (temp_unc == NULL)
2763 return -ENOMEM;
2764 temp_unc[0] = '\\';
2765 temp_unc[1] = '\\';
2e6e02ab
PS		 2766 strcpy(temp_unc + 2, ses->serverName);
2767 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2768 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2769 nls_codepage);
f96637be 2770 cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid);
1da177e4
LT		 2771 kfree(temp_unc);
2772 }
2773 if (rc == 0)
b669f33c
PS		 2774 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2775 referrals, num_referrals,
2776 nls_codepage, remap);
2e6e02ab
PS		 2777 /*
2778 * BB - map targetUNCs to dfs_info3 structures, here or in
b669f33c 2779 * ses->server->ops->get_dfs_refer.
2e6e02ab 2780 */
1da177e4
LT		 2781
2782 return rc;
2783}
2784
09e50d55
JL		 2785#ifdef CONFIG_DEBUG_LOCK_ALLOC
2786static struct lock_class_key cifs_key[2];
2787static struct lock_class_key cifs_slock_key[2];
2788
2789static inline void
2790cifs_reclassify_socket4(struct socket *sock)
2791{
2792 struct sock *sk = sock->sk;
2793 BUG_ON(sock_owned_by_user(sk));
2794 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2795 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2796}
2797
2798static inline void
2799cifs_reclassify_socket6(struct socket *sock)
2800{
2801 struct sock *sk = sock->sk;
2802 BUG_ON(sock_owned_by_user(sk));
2803 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2804 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2805}
2806#else
2807static inline void
2808cifs_reclassify_socket4(struct socket *sock)
2809{
2810}
2811
2812static inline void
2813cifs_reclassify_socket6(struct socket *sock)
2814{
2815}
2816#endif
2817
1da177e4 2818/* See RFC1001 section 14 on representation of Netbios names */
50c2f753 2819static void rfc1002mangle(char *target, char *source, unsigned int length)
1da177e4 2820{
50c2f753 2821 unsigned int i, j;
1da177e4 2822
50c2f753 2823 for (i = 0, j = 0; i < (length); i++) {
1da177e4
LT		 2824 /* mask a nibble at a time and encode */
2825 target[j] = 'A' + (0x0F & (source[i] >> 4));
2826 target[j+1] = 'A' + (0x0F & source[i]);
50c2f753 2827 j += 2;
1da177e4
LT		 2828 }
2829
2830}
2831
3eb9a889
BG		 2832static int
2833bind_socket(struct TCP_Server_Info *server)
2834{
2835 int rc = 0;
2836 if (server->srcaddr.ss_family != AF_UNSPEC) {
2837 /* Bind to the specified local IP address */
2838 struct socket *socket = server->ssocket;
2839 rc = socket->ops->bind(socket,
2840 (struct sockaddr *) &server->srcaddr,
2841 sizeof(server->srcaddr));
2842 if (rc < 0) {
2843 struct sockaddr_in *saddr4;
2844 struct sockaddr_in6 *saddr6;
2845 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2846 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2847 if (saddr6->sin6_family == AF_INET6)
f96637be
JP		 2848 cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
2849 &saddr6->sin6_addr, rc);
3eb9a889 2850 else
f96637be
JP		 2851 cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
2852 &saddr4->sin_addr.s_addr, rc);
3eb9a889
BG		 2853 }
2854 }
2855 return rc;
2856}
1da177e4
LT		 2857
2858static int
a9f1b85e 2859ip_rfc1001_connect(struct TCP_Server_Info *server)
1da177e4
LT		 2860{
2861 int rc = 0;
a9f1b85e
PS		 2862 /*
2863 * some servers require RFC1001 sessinit before sending
2864 * negprot - BB check reconnection in case where second
2865 * sessinit is sent but no second negprot
2866 */
2867 struct rfc1002_session_packet *ses_init_buf;
2868 struct smb_hdr *smb_buf;
2869 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2870 GFP_KERNEL);
2871 if (ses_init_buf) {
2872 ses_init_buf->trailer.session_req.called_len = 32;
2873
2874 if (server->server_RFC1001_name &&
2875 server->server_RFC1001_name[0] != 0)
2876 rfc1002mangle(ses_init_buf->trailer.
2877 session_req.called_name,
2878 server->server_RFC1001_name,
2879 RFC1001_NAME_LEN_WITH_NULL);
2880 else
2881 rfc1002mangle(ses_init_buf->trailer.
2882 session_req.called_name,
2883 DEFAULT_CIFS_CALLED_NAME,
2884 RFC1001_NAME_LEN_WITH_NULL);
2885
2886 ses_init_buf->trailer.session_req.calling_len = 32;
2887
2888 /*
2889 * calling name ends in null (byte 16) from old smb
2890 * convention.
2891 */
2892 if (server->workstation_RFC1001_name &&
2893 server->workstation_RFC1001_name[0] != 0)
2894 rfc1002mangle(ses_init_buf->trailer.
2895 session_req.calling_name,
2896 server->workstation_RFC1001_name,
2897 RFC1001_NAME_LEN_WITH_NULL);
2898 else
2899 rfc1002mangle(ses_init_buf->trailer.
2900 session_req.calling_name,
2901 "LINUX_CIFS_CLNT",
2902 RFC1001_NAME_LEN_WITH_NULL);
2903
2904 ses_init_buf->trailer.session_req.scope1 = 0;
2905 ses_init_buf->trailer.session_req.scope2 = 0;
2906 smb_buf = (struct smb_hdr *)ses_init_buf;
2907
2908 /* sizeof RFC1002_SESSION_REQUEST with no scope */
be8e3b00 2909 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
a9f1b85e
PS		 2910 rc = smb_send(server, smb_buf, 0x44);
2911 kfree(ses_init_buf);
2912 /*
2913 * RFC1001 layer in at least one server
2914 * requires very short break before negprot
2915 * presumably because not expecting negprot
2916 * to follow so fast. This is a simple
2917 * solution that works without
2918 * complicating the code and causes no
2919 * significant slowing down on mount
2920 * for everyone else
2921 */
2922 usleep_range(1000, 2000);
2923 }
2924 /*
2925 * else the negprot may still work without this
2926 * even though malloc failed
2927 */
2928
2929 return rc;
2930}
2931
2932static int
2933generic_ip_connect(struct TCP_Server_Info *server)
2934{
2935 int rc = 0;
6da97910 2936 __be16 sport;
a9f1b85e 2937 int slen, sfamily;
bcf4b106 2938 struct socket *socket = server->ssocket;
a9f1b85e
PS		 2939 struct sockaddr *saddr;
2940
2941 saddr = (struct sockaddr *) &server->dstaddr;
2942
2943 if (server->dstaddr.ss_family == AF_INET6) {
2944 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2945 slen = sizeof(struct sockaddr_in6);
2946 sfamily = AF_INET6;
2947 } else {
2948 sport = ((struct sockaddr_in *) saddr)->sin_port;
2949 slen = sizeof(struct sockaddr_in);
2950 sfamily = AF_INET;
2951 }
1da177e4 2952
bcf4b106 2953 if (socket == NULL) {
f1d0c998
RL		 2954 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2955 IPPROTO_TCP, &socket, 1);
1da177e4 2956 if (rc < 0) {
f96637be 2957 cifs_dbg(VFS, "Error %d creating socket\n", rc);
a9f1b85e 2958 server->ssocket = NULL;
1da177e4 2959 return rc;
1da177e4 2960 }
bcf4b106
JL		 2961
2962 /* BB other socket options to set KEEPALIVE, NODELAY? */
f96637be 2963 cifs_dbg(FYI, "Socket created\n");
bcf4b106
JL		 2964 server->ssocket = socket;
2965 socket->sk->sk_allocation = GFP_NOFS;
a9f1b85e
PS		 2966 if (sfamily == AF_INET6)
2967 cifs_reclassify_socket6(socket);
2968 else
2969 cifs_reclassify_socket4(socket);
1da177e4
LT		 2970 }
2971
3eb9a889
BG		 2972 rc = bind_socket(server);
2973 if (rc < 0)
2974 return rc;
2975
bcf4b106
JL		 2976 /*
2977 * Eventually check for other socket options to change from
a9f1b85e
PS		 2978 * the default. sock_setsockopt not used because it expects
2979 * user space buffer
bcf4b106
JL		 2980 */
2981 socket->sk->sk_rcvtimeo = 7 * HZ;
da505c38 2982 socket->sk->sk_sndtimeo = 5 * HZ;
edf1ae40 2983
b387eaeb 2984 /* make the bufsizes depend on wsize/rsize and max requests */
bcf4b106
JL		 2985 if (server->noautotune) {
2986 if (socket->sk->sk_sndbuf < (200 * 1024))
2987 socket->sk->sk_sndbuf = 200 * 1024;
2988 if (socket->sk->sk_rcvbuf < (140 * 1024))
2989 socket->sk->sk_rcvbuf = 140 * 1024;
edf1ae40 2990 }
1da177e4 2991
6a5fa236 2992 if (server->tcp_nodelay) {
a9f1b85e 2993 int val = 1;
6a5fa236
SF		 2994 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2995 (char *)&val, sizeof(val));
2996 if (rc)
f96637be
JP		 2997 cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n",
2998 rc);
6a5fa236
SF		 2999 }
3000
f96637be 3001 cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
bcf4b106 3002 socket->sk->sk_sndbuf,
b6b38f70 3003 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
bcf4b106 3004
ee1b3ea9
JL		 3005 rc = socket->ops->connect(socket, saddr, slen, 0);
3006 if (rc < 0) {
f96637be 3007 cifs_dbg(FYI, "Error %d connecting to server\n", rc);
ee1b3ea9
JL		 3008 sock_release(socket);
3009 server->ssocket = NULL;
3010 return rc;
3011 }
3012
a9f1b85e
PS		 3013 if (sport == htons(RFC1001_PORT))
3014 rc = ip_rfc1001_connect(server);
50c2f753 3015
1da177e4
LT		 3016 return rc;
3017}
3018
3019static int
a9f1b85e 3020ip_connect(struct TCP_Server_Info *server)
1da177e4 3021{
6da97910 3022 __be16 *sport;
a9f1b85e
PS		 3023 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3024 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
1da177e4 3025
a9f1b85e
PS		 3026 if (server->dstaddr.ss_family == AF_INET6)
3027 sport = &addr6->sin6_port;
3028 else
3029 sport = &addr->sin_port;
1da177e4 3030
a9f1b85e
PS		 3031 if (*sport == 0) {
3032 int rc;
1da177e4 3033
a9f1b85e
PS		 3034 /* try with 445 port at first */
3035 *sport = htons(CIFS_PORT);
3eb9a889 3036
a9f1b85e 3037 rc = generic_ip_connect(server);
1da177e4 3038 if (rc >= 0)
a9f1b85e 3039 return rc;
6a5fa236 3040
a9f1b85e
PS		 3041 /* if it failed, try with 139 port */
3042 *sport = htons(RFC1001_PORT);
6a5fa236
SF		 3043 }
3044
a9f1b85e 3045 return generic_ip_connect(server);
1da177e4
LT		 3046}
3047
6d5786a3 3048void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
2c6292ae 3049 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
8af18971
SF		 3050{
3051 /* if we are reconnecting then should we check to see if
3052 * any requested capabilities changed locally e.g. via
3053 * remount but we can not do much about it here
3054 * if they have (even if we could detect it by the following)
3055 * Perhaps we could add a backpointer to array of sb from tcon
3056 * or if we change to make all sb to same share the same
3057 * sb as NFS - then we only have one backpointer to sb.
3058 * What if we wanted to mount the server share twice once with
3059 * and once without posixacls or posix paths? */
3060 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
50c2f753 3061
c18c842b
SF		 3062 if (vol_info && vol_info->no_linux_ext) {
3063 tcon->fsUnixInfo.Capability = 0;
3064 tcon->unix_ext = 0; /* Unix Extensions disabled */
f96637be 3065 cifs_dbg(FYI, "Linux protocol extensions disabled\n");
c18c842b
SF		 3066 return;
3067 } else if (vol_info)
3068 tcon->unix_ext = 1; /* Unix Extensions supported */
3069
3070 if (tcon->unix_ext == 0) {
f96637be 3071 cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
c18c842b
SF		 3072 return;
3073 }
50c2f753 3074
fb8c4b14 3075 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
8af18971 3076 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
f96637be 3077 cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
8af18971
SF		 3078 /* check for reconnect case in which we do not
3079 want to change the mount behavior if we can avoid it */
fb8c4b14 3080 if (vol_info == NULL) {
50c2f753 3081 /* turn off POSIX ACL and PATHNAMES if not set
8af18971
SF		 3082 originally at mount time */
3083 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3084 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
11b6d645
IM		 3085 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3086 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
f96637be 3087 cifs_dbg(VFS, "POSIXPATH support change\n");
8af18971 3088 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
11b6d645 3089 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
f96637be
JP		 3090 cifs_dbg(VFS, "possible reconnect error\n");
3091 cifs_dbg(VFS, "server disabled POSIX path support\n");
11b6d645 3092 }
8af18971 3093 }
50c2f753 3094
6848b733 3095 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
f96637be 3096 cifs_dbg(VFS, "per-share encryption not supported yet\n");
6848b733 3097
8af18971 3098 cap &= CIFS_UNIX_CAP_MASK;
75865f8c 3099 if (vol_info && vol_info->no_psx_acl)
8af18971 3100 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
75865f8c 3101 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
f96637be 3102 cifs_dbg(FYI, "negotiated posix acl support\n");
2c6292ae
AV		 3103 if (cifs_sb)
3104 cifs_sb->mnt_cifs_flags |=
3105 CIFS_MOUNT_POSIXACL;
8af18971
SF		 3106 }
3107
75865f8c 3108 if (vol_info && vol_info->posix_paths == 0)
8af18971 3109 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
75865f8c 3110 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
f96637be 3111 cifs_dbg(FYI, "negotiate posix pathnames\n");
2c6292ae
AV		 3112 if (cifs_sb)
3113 cifs_sb->mnt_cifs_flags |=
8af18971
SF		 3114 CIFS_MOUNT_POSIX_PATHS;
3115 }
50c2f753 3116
f96637be 3117 cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
8af18971 3118#ifdef CONFIG_CIFS_DEBUG2
75865f8c 3119 if (cap & CIFS_UNIX_FCNTL_CAP)
f96637be 3120 cifs_dbg(FYI, "FCNTL cap\n");
75865f8c 3121 if (cap & CIFS_UNIX_EXTATTR_CAP)
f96637be 3122 cifs_dbg(FYI, "EXTATTR cap\n");
75865f8c 3123 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
f96637be 3124 cifs_dbg(FYI, "POSIX path cap\n");
75865f8c 3125 if (cap & CIFS_UNIX_XATTR_CAP)
f96637be 3126 cifs_dbg(FYI, "XATTR cap\n");
75865f8c 3127 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
f96637be 3128 cifs_dbg(FYI, "POSIX ACL cap\n");
75865f8c 3129 if (cap & CIFS_UNIX_LARGE_READ_CAP)
f96637be 3130 cifs_dbg(FYI, "very large read cap\n");
75865f8c 3131 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
f96637be 3132 cifs_dbg(FYI, "very large write cap\n");
6848b733 3133 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
f96637be 3134 cifs_dbg(FYI, "transport encryption cap\n");
6848b733 3135 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
f96637be 3136 cifs_dbg(FYI, "mandatory transport encryption cap\n");
8af18971
SF		 3137#endif /* CIFS_DEBUG2 */
3138 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
442aa310 3139 if (vol_info == NULL) {
f96637be 3140 cifs_dbg(FYI, "resetting capabilities failed\n");
442aa310 3141 } else
f96637be 3142 cifs_dbg(VFS, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n");
5a44b319 3143
8af18971
SF		 3144 }
3145 }
3146}
3147
724d9f1c
PS		 3148void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3149 struct cifs_sb_info *cifs_sb)
b1c8d2b4 3150{
2de970ff
JL		 3151 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3152
2ced6f69
AV		 3153 spin_lock_init(&cifs_sb->tlink_tree_lock);
3154 cifs_sb->tlink_tree = RB_ROOT;
3155
25c7f41e 3156 /*
5eba8ab3
JL		 3157 * Temporarily set r/wsize for matching superblock. If we end up using
3158 * new sb then client will later negotiate it downward if needed.
25c7f41e 3159 */
5eba8ab3 3160 cifs_sb->rsize = pvolume_info->rsize;
25c7f41e
PS		 3161 cifs_sb->wsize = pvolume_info->wsize;
3162
3b795210
SF		 3163 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3164 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3165 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3166 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
f96637be
JP		 3167 cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n",
3168 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3b795210 3169
6d20e840 3170 cifs_sb->actimeo = pvolume_info->actimeo;
724d9f1c 3171 cifs_sb->local_nls = pvolume_info->local_nls;
6d20e840 3172
3b795210
SF		 3173 if (pvolume_info->noperm)
3174 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3175 if (pvolume_info->setuids)
3176 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3177 if (pvolume_info->server_ino)
3178 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3179 if (pvolume_info->remap)
3180 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3181 if (pvolume_info->no_xattr)
3182 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3183 if (pvolume_info->sfu_emul)
3184 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3185 if (pvolume_info->nobrl)
3186 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
be652445 3187 if (pvolume_info->nostrictsync)
4717bed6 3188 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
13a6e42a
SF		 3189 if (pvolume_info->mand_lock)
3190 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
d4ffff1f
PS		 3191 if (pvolume_info->rwpidforward)
3192 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3b795210
SF		 3193 if (pvolume_info->cifs_acl)
3194 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3c7c87fd 3195 if (pvolume_info->backupuid_specified) {
3d3ea8e6 3196 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3c7c87fd
SP		 3197 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3198 }
3199 if (pvolume_info->backupgid_specified) {
3d3ea8e6 3200 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3c7c87fd
SP		 3201 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3202 }
3b795210
SF		 3203 if (pvolume_info->override_uid)
3204 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3205 if (pvolume_info->override_gid)
3206 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3207 if (pvolume_info->dynperm)
3208 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
fa1df75d
SJ		 3209 if (pvolume_info->fsc)
3210 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
0eb8a132
JL		 3211 if (pvolume_info->multiuser)
3212 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3213 CIFS_MOUNT_NO_PERM);
d39454ff
PS		 3214 if (pvolume_info->strict_io)
3215 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3b795210 3216 if (pvolume_info->direct_io) {
f96637be 3217 cifs_dbg(FYI, "mounting share using direct i/o\n");
3b795210
SF		 3218 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3219 }
736a3320
SM		 3220 if (pvolume_info->mfsymlinks) {
3221 if (pvolume_info->sfu_emul) {
f96637be 3222 cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n");
736a3320
SM		 3223 } else {
3224 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3225 }
3226 }
3b795210
SF		 3227
3228 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
f96637be 3229 cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
b1c8d2b4
JL		 3230}
3231
b9bce2e9
JL		 3232static void
3233cleanup_volume_info_contents(struct smb_vol *volume_info)
1bfe73c2 3234{
b946845a 3235 kfree(volume_info->username);
1bfe73c2 3236 kzfree(volume_info->password);
95c75454 3237 kfree(volume_info->UNC);
b946845a
SF		 3238 kfree(volume_info->domainname);
3239 kfree(volume_info->iocharset);
1bfe73c2 3240 kfree(volume_info->prepath);
b9bce2e9
JL		 3241}
3242
3243void
3244cifs_cleanup_volume_info(struct smb_vol *volume_info)
3245{
3246 if (!volume_info)
3247 return;
3248 cleanup_volume_info_contents(volume_info);
1bfe73c2 3249 kfree(volume_info);
1bfe73c2
IM		 3250}
3251
b9bce2e9 3252
2d6d589d 3253#ifdef CONFIG_CIFS_DFS_UPCALL
6d3ea7e4
SF		 3254/*
3255 * cifs_build_path_to_root returns full path to root when we do not have an
3256 * exiting connection (tcon)
3257 */
1bfe73c2 3258static char *
b2a0fa15 3259build_unc_path_to_root(const struct smb_vol *vol,
1bfe73c2
IM		 3260 const struct cifs_sb_info *cifs_sb)
3261{
b2a0fa15 3262 char *full_path, *pos;
839db3d1 3263 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
b2a0fa15 3264 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
1bfe73c2 3265
b2a0fa15 3266 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
1bfe73c2
IM		 3267 if (full_path == NULL)
3268 return ERR_PTR(-ENOMEM);
3269
b2a0fa15
JL		 3270 strncpy(full_path, vol->UNC, unc_len);
3271 pos = full_path + unc_len;
3272
3273 if (pplen) {
1fc29bac
JL		 3274 *pos = CIFS_DIR_SEP(cifs_sb);
3275 strncpy(pos + 1, vol->prepath, pplen);
b2a0fa15
JL		 3276 pos += pplen;
3277 }
3278
3279 *pos = '\0'; /* add trailing null */
f87d39d9 3280 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
f96637be 3281 cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path);
1bfe73c2
IM		 3282 return full_path;
3283}
dd613945
SF		 3284
3285/*
3286 * Perform a dfs referral query for a share and (optionally) prefix
3287 *
046462ab
SF		 3288 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3289 * to a string containing updated options for the submount. Otherwise it
3290 * will be left untouched.
dd613945
SF		 3291 *
3292 * Returns the rc from get_dfs_path to the caller, which can be used to
3293 * determine whether there were referrals.
3294 */
3295static int
b669f33c 3296expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
dd613945 3297 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
046462ab 3298 int check_prefix)
dd613945
SF		 3299{
3300 int rc;
3301 unsigned int num_referrals = 0;
3302 struct dfs_info3_param *referrals = NULL;
3303 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3304
3305 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3306 if (IS_ERR(full_path))
3307 return PTR_ERR(full_path);
3308
3309 /* For DFS paths, skip the first '\' of the UNC */
3310 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3311
b669f33c 3312 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
dd613945
SF		 3313 &num_referrals, &referrals,
3314 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3315
3316 if (!rc && num_referrals > 0) {
3317 char *fake_devname = NULL;
3318
3319 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3320 full_path + 1, referrals,
3321 &fake_devname);
3322
3323 free_dfs_info_array(referrals, num_referrals);
046462ab 3324
dd613945
SF		 3325 if (IS_ERR(mdata)) {
3326 rc = PTR_ERR(mdata);
3327 mdata = NULL;
b9bce2e9
JL		 3328 } else {
3329 cleanup_volume_info_contents(volume_info);
b9bce2e9
JL		 3330 rc = cifs_setup_volume_info(volume_info, mdata,
3331 fake_devname);
dd613945 3332 }
b9bce2e9
JL		 3333 kfree(fake_devname);
3334 kfree(cifs_sb->mountdata);
046462ab 3335 cifs_sb->mountdata = mdata;
dd613945
SF		 3336 }
3337 kfree(full_path);
3338 return rc;
3339}
2d6d589d 3340#endif
1bfe73c2 3341
04db79b0
JL		 3342static int
3343cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3344 const char *devname)
1da177e4 3345{
724d9f1c 3346 int rc = 0;
1da177e4 3347
04db79b0
JL		 3348 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3349 return -EINVAL;
1da177e4 3350
7586b765 3351 if (volume_info->nullauth) {
f96637be 3352 cifs_dbg(FYI, "Anonymous login\n");
04febabc
JL		 3353 kfree(volume_info->username);
3354 volume_info->username = NULL;
7586b765 3355 } else if (volume_info->username) {
1da177e4 3356 /* BB fixme parse for domain name here */
f96637be 3357 cifs_dbg(FYI, "Username: %s\n", volume_info->username);
1da177e4 3358 } else {
f96637be 3359 cifs_dbg(VFS, "No username specified\n");
50c2f753
SF		 3360 /* In userspace mount helper we can get user name from alternate
3361 locations such as env variables and files on disk */
04db79b0 3362 return -EINVAL;
1da177e4
LT		 3363 }
3364
1da177e4 3365 /* this is needed for ASCII cp to Unicode converts */
7586b765 3366 if (volume_info->iocharset == NULL) {
a5fc4ce0
JL		 3367 /* load_nls_default cannot return null */
3368 volume_info->local_nls = load_nls_default();
1da177e4 3369 } else {
a5fc4ce0
JL		 3370 volume_info->local_nls = load_nls(volume_info->iocharset);
3371 if (volume_info->local_nls == NULL) {
f96637be 3372 cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
b6b38f70 3373 volume_info->iocharset);
04db79b0 3374 return -ELIBACC;
1da177e4
LT		 3375 }
3376 }
724d9f1c 3377
724d9f1c
PS		 3378 return rc;
3379}
3380
04db79b0
JL		 3381struct smb_vol *
3382cifs_get_volume_info(char *mount_data, const char *devname)
3383{
3384 int rc;
3385 struct smb_vol *volume_info;
3386
6ee9542a 3387 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
04db79b0
JL		 3388 if (!volume_info)
3389 return ERR_PTR(-ENOMEM);
3390
3391 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3392 if (rc) {
3393 cifs_cleanup_volume_info(volume_info);
3394 volume_info = ERR_PTR(rc);
3395 }
3396
3397 return volume_info;
3398}
3399
724d9f1c 3400int
2c6292ae 3401cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
724d9f1c 3402{
1daaae8f 3403 int rc;
6d5786a3 3404 unsigned int xid;
af4281dc 3405 struct cifs_ses *ses;
96daf2b0 3406 struct cifs_tcon *tcon;
af4281dc 3407 struct TCP_Server_Info *server;
724d9f1c
PS		 3408 char *full_path;
3409 struct tcon_link *tlink;
3410#ifdef CONFIG_CIFS_DFS_UPCALL
3411 int referral_walks_count = 0;
20547490 3412#endif
dd854466
AV		 3413
3414 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3415 if (rc)
3416 return rc;
3417
20547490 3418#ifdef CONFIG_CIFS_DFS_UPCALL
724d9f1c
PS		 3419try_mount_again:
3420 /* cleanup activities if we're chasing a referral */
3421 if (referral_walks_count) {
3422 if (tcon)
3423 cifs_put_tcon(tcon);
af4281dc
PS		 3424 else if (ses)
3425 cifs_put_smb_ses(ses);
724d9f1c 3426
6d5786a3 3427 free_xid(xid);
724d9f1c
PS		 3428 }
3429#endif
1daaae8f 3430 rc = 0;
724d9f1c 3431 tcon = NULL;
af4281dc
PS		 3432 ses = NULL;
3433 server = NULL;
724d9f1c
PS		 3434 full_path = NULL;
3435 tlink = NULL;
3436
6d5786a3 3437 xid = get_xid();
1da177e4 3438
63c038c2 3439 /* get a reference to a tcp session */
af4281dc
PS		 3440 server = cifs_get_tcp_session(volume_info);
3441 if (IS_ERR(server)) {
3442 rc = PTR_ERR(server);
dd854466 3443 bdi_destroy(&cifs_sb->bdi);
63c038c2 3444 goto out;
1da177e4
LT		 3445 }
3446
36988c76 3447 /* get a reference to a SMB session */
af4281dc
PS		 3448 ses = cifs_get_smb_ses(server, volume_info);
3449 if (IS_ERR(ses)) {
3450 rc = PTR_ERR(ses);
3451 ses = NULL;
36988c76 3452 goto mount_fail_check;
1da177e4 3453 }
50c2f753 3454
d00c28de 3455 /* search for existing tcon to this server share */
af4281dc 3456 tcon = cifs_get_tcon(ses, volume_info);
d00c28de
JL		 3457 if (IS_ERR(tcon)) {
3458 rc = PTR_ERR(tcon);
3459 tcon = NULL;
1bfe73c2 3460 goto remote_path_check;
d00c28de 3461 }
1bfe73c2 3462
d82c2df5 3463 /* tell server which Unix caps we support */
29e20f9c 3464 if (cap_unix(tcon->ses)) {
d82c2df5
SF		 3465 /* reset of caps checks mount to see if unix extensions
3466 disabled for just this mount */
2c6292ae 3467 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
6848b733
SF		 3468 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3469 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3470 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3471 rc = -EACCES;
3472 goto mount_fail_check;
3473 }
3474 } else
d82c2df5 3475 tcon->unix_ext = 0; /* server does not support them */
c18c842b 3476
af4281dc
PS		 3477 /* do not care if a following call succeed - informational */
3478 if (!tcon->ipc && server->ops->qfs_tcon)
3479 server->ops->qfs_tcon(xid, tcon);
6848b733 3480
24985c53
PS		 3481 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3482 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
f7910cbd 3483
66bfaadc 3484 /* tune readahead according to rsize */
8f71465c 3485 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
f7910cbd 3486
1bfe73c2 3487remote_path_check:
c1508ca2
SF		 3488#ifdef CONFIG_CIFS_DFS_UPCALL
3489 /*
3490 * Perform an unconditional check for whether there are DFS
3491 * referrals for this path without prefix, to provide support
3492 * for DFS referrals from w2k8 servers which don't seem to respond
3493 * with PATH_NOT_COVERED to requests that include the prefix.
3494 * Chase the referral if found, otherwise continue normally.
3495 */
3496 if (referral_walks_count == 0) {
af4281dc
PS		 3497 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3498 false);
c1508ca2
SF		 3499 if (!refrc) {
3500 referral_walks_count++;
3501 goto try_mount_again;
3502 }
3503 }
3504#endif
3505
f87d39d9 3506 /* check if a whole path is not remote */
70945643 3507 if (!rc && tcon) {
68889f26
PS		 3508 if (!server->ops->is_path_accessible) {
3509 rc = -ENOSYS;
3510 goto mount_fail_check;
3511 }
6d3ea7e4
SF		 3512 /*
3513 * cifs_build_path_to_root works only when we have a valid tcon
3514 */
3515 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
e4cce94c
IM		 3516 if (full_path == NULL) {
3517 rc = -ENOMEM;
3518 goto mount_fail_check;
3519 }
68889f26
PS		 3520 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3521 full_path);
03ceace5 3522 if (rc != 0 && rc != -EREMOTE) {
e4cce94c
IM		 3523 kfree(full_path);
3524 goto mount_fail_check;
3525 }
3526 kfree(full_path);
3527 }
3528
1bfe73c2
IM		 3529 /* get referral if needed */
3530 if (rc == -EREMOTE) {
d036f50f 3531#ifdef CONFIG_CIFS_DFS_UPCALL
5c2503a8
IM		 3532 if (referral_walks_count > MAX_NESTED_LINKS) {
3533 /*
3534 * BB: when we implement proper loop detection,
3535 * we will remove this check. But now we need it
3536 * to prevent an indefinite loop if 'DFS tree' is
3537 * misconfigured (i.e. has loops).
3538 */
3539 rc = -ELOOP;
3540 goto mount_fail_check;
3541 }
1bfe73c2 3542
af4281dc 3543 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
7b91e266 3544
dd613945 3545 if (!rc) {
5c2503a8 3546 referral_walks_count++;
1bfe73c2
IM		 3547 goto try_mount_again;
3548 }
dd613945 3549 goto mount_fail_check;
d036f50f
SF		 3550#else /* No DFS support, return error on mount */
3551 rc = -EOPNOTSUPP;
3552#endif
1bfe73c2
IM		 3553 }
3554
9d002df4
JL		 3555 if (rc)
3556 goto mount_fail_check;
3557
3558 /* now, hang the tcon off of the superblock */
3559 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3560 if (tlink == NULL) {
3561 rc = -ENOMEM;
3562 goto mount_fail_check;
3563 }
3564
af4281dc 3565 tlink->tl_uid = ses->linux_uid;
9d002df4
JL		 3566 tlink->tl_tcon = tcon;
3567 tlink->tl_time = jiffies;
3568 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3569 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3570
b647c35f 3571 cifs_sb->master_tlink = tlink;
9d002df4 3572 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 3573 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
9d002df4 3574 spin_unlock(&cifs_sb->tlink_tree_lock);
413e661c 3575
da472fc8 3576 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 3577 TLINK_IDLE_EXPIRE);
3578
1bfe73c2
IM		 3579mount_fail_check:
3580 /* on error free sesinfo and tcon struct if needed */
3581 if (rc) {
1bfe73c2 3582 /* If find_unc succeeded then rc == 0 so we can not end */
25985edc 3583 /* up accidentally freeing someone elses tcon struct */
1bfe73c2
IM		 3584 if (tcon)
3585 cifs_put_tcon(tcon);
af4281dc
PS		 3586 else if (ses)
3587 cifs_put_smb_ses(ses);
1bfe73c2 3588 else
af4281dc 3589 cifs_put_tcp_session(server);
dd854466 3590 bdi_destroy(&cifs_sb->bdi);
1bfe73c2
IM		 3591 }
3592
70fe7dc0 3593out:
6d5786a3 3594 free_xid(xid);
1da177e4
LT		 3595 return rc;
3596}
3597
8d1bca32
JL		 3598/*
3599 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3600 * pointer may be NULL.
3601 */
1da177e4 3602int
2e6e02ab 3603CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
96daf2b0 3604 const char *tree, struct cifs_tcon *tcon,
1da177e4
LT		 3605 const struct nls_table *nls_codepage)
3606{
3607 struct smb_hdr *smb_buffer;
3608 struct smb_hdr *smb_buffer_response;
3609 TCONX_REQ *pSMB;
3610 TCONX_RSP *pSMBr;
3611 unsigned char *bcc_ptr;
3612 int rc = 0;
690c522f
JL		 3613 int length;
3614 __u16 bytes_left, count;
1da177e4
LT		 3615
3616 if (ses == NULL)
3617 return -EIO;
3618
3619 smb_buffer = cifs_buf_get();
ca43e3be 3620 if (smb_buffer == NULL)
1da177e4 3621 return -ENOMEM;
ca43e3be 3622
1da177e4
LT		 3623 smb_buffer_response = smb_buffer;
3624
3625 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3626 NULL /*no tid */ , 4 /*wct */ );
1982c344 3627
88257360 3628 smb_buffer->Mid = get_next_mid(ses->server);
1da177e4
LT		 3629 smb_buffer->Uid = ses->Suid;
3630 pSMB = (TCONX_REQ *) smb_buffer;
3631 pSMBr = (TCONX_RSP *) smb_buffer_response;
3632
3633 pSMB->AndXCommand = 0xFF;
3634 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
1da177e4 3635 bcc_ptr = &pSMB->Password[0];
8d1bca32 3636 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
eeac8047 3637 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
7c7b25bc 3638 *bcc_ptr = 0; /* password is null byte */
eeac8047 3639 bcc_ptr++; /* skip password */
7c7b25bc 3640 /* already aligned so no need to do it below */
eeac8047 3641 } else {
540b2e37 3642 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
eeac8047
SF		 3643 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3644 specified as required (when that support is added to
3645 the vfs in the future) as only NTLM or the much
7c7b25bc 3646 weaker LANMAN (which we do not send by default) is accepted
eeac8047
SF		 3647 by Samba (not sure whether other servers allow
3648 NTLMv2 password here) */
7c7b25bc 3649#ifdef CONFIG_CIFS_WEAK_PW_HASH
04912d6a 3650 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
3f618223 3651 (ses->sectype == LANMAN))
d3ba50b1 3652 calc_lanman_hash(tcon->password, ses->server->cryptkey,
96daf2b0 3653 ses->server->sec_mode &
4e53a3fb
JL		 3654 SECMODE_PW_ENCRYPT ? true : false,
3655 bcc_ptr);
7c7b25bc
SF		 3656 else
3657#endif /* CIFS_WEAK_PW_HASH */
ee2c9258 3658 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
9ef5992e 3659 bcc_ptr, nls_codepage);
eeac8047 3660
540b2e37 3661 bcc_ptr += CIFS_AUTH_RESP_SIZE;
fb8c4b14 3662 if (ses->capabilities & CAP_UNICODE) {
7c7b25bc
SF		 3663 /* must align unicode strings */
3664 *bcc_ptr = 0; /* null byte password */
3665 bcc_ptr++;
3666 }
eeac8047 3667 }
1da177e4 3668
38d77c50 3669 if (ses->server->sign)
1da177e4
LT		 3670 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3671
3672 if (ses->capabilities & CAP_STATUS32) {
3673 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3674 }
3675 if (ses->capabilities & CAP_DFS) {
3676 smb_buffer->Flags2 |= SMBFLG2_DFS;
3677 }
3678 if (ses->capabilities & CAP_UNICODE) {
3679 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3680 length =
acbbb76a 3681 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
50c2f753 3682 6 /* max utf8 char length in bytes */ *
a878fb22
SF		 3683 (/* server len*/ + 256 /* share len */), nls_codepage);
3684 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
1da177e4
LT		 3685 bcc_ptr += 2; /* skip trailing null */
3686 } else { /* ASCII */
1da177e4
LT		 3687 strcpy(bcc_ptr, tree);
3688 bcc_ptr += strlen(tree) + 1;
3689 }
3690 strcpy(bcc_ptr, "?????");
3691 bcc_ptr += strlen("?????");
3692 bcc_ptr += 1;
3693 count = bcc_ptr - &pSMB->Password[0];
be8e3b00
SF		 3694 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3695 pSMB->hdr.smb_buf_length) + count);
1da177e4
LT		 3696 pSMB->ByteCount = cpu_to_le16(count);
3697
133672ef 3698 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
7749981e 3699 0);
1da177e4 3700
1da177e4
LT		 3701 /* above now done in SendReceive */
3702 if ((rc == 0) && (tcon != NULL)) {
0e0d2cf3
SF		 3703 bool is_unicode;
3704
1da177e4 3705 tcon->tidStatus = CifsGood;
3b795210 3706 tcon->need_reconnect = false;
1da177e4
LT		 3707 tcon->tid = smb_buffer_response->Tid;
3708 bcc_ptr = pByteArea(smb_buffer_response);
690c522f 3709 bytes_left = get_bcc(smb_buffer_response);
cc20c031 3710 length = strnlen(bcc_ptr, bytes_left - 2);
0e0d2cf3
SF		 3711 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3712 is_unicode = true;
3713 else
3714 is_unicode = false;
3715
cc20c031 3716
50c2f753 3717 /* skip service field (NB: this field is always ASCII) */
7f8ed420
SF		 3718 if (length == 3) {
3719 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3720 (bcc_ptr[2] == 'C')) {
f96637be 3721 cifs_dbg(FYI, "IPC connection\n");
7f8ed420
SF		 3722 tcon->ipc = 1;
3723 }
3724 } else if (length == 2) {
3725 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3726 /* the most common case */
f96637be 3727 cifs_dbg(FYI, "disk share connection\n");
7f8ed420
SF		 3728 }
3729 }
50c2f753 3730 bcc_ptr += length + 1;
cc20c031 3731 bytes_left -= (length + 1);
46b51d08 3732 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
cc20c031
JL		 3733
3734 /* mostly informational -- no need to fail on error here */
90a98b2f 3735 kfree(tcon->nativeFileSystem);
acbbb76a 3736 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
0e0d2cf3 3737 bytes_left, is_unicode,
cc20c031
JL		 3738 nls_codepage);
3739
f96637be 3740 cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
cc20c031 3741
fb8c4b14 3742 if ((smb_buffer_response->WordCount == 3) ||
1a4e15a0
SF		 3743 (smb_buffer_response->WordCount == 7))
3744 /* field is in same location */
3979877e
SF		 3745 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3746 else
3747 tcon->Flags = 0;
f96637be 3748 cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
1da177e4 3749 } else if ((rc == 0) && tcon == NULL) {
50c2f753 3750 /* all we need to save for IPC$ connection */
1da177e4
LT		 3751 ses->ipc_tid = smb_buffer_response->Tid;
3752 }
3753
a8a11d39 3754 cifs_buf_release(smb_buffer);
1da177e4
LT		 3755 return rc;
3756}
3757
2a9b9951
AV		 3758void
3759cifs_umount(struct cifs_sb_info *cifs_sb)
1da177e4 3760{
b647c35f
JL		 3761 struct rb_root *root = &cifs_sb->tlink_tree;
3762 struct rb_node *node;
3763 struct tcon_link *tlink;
9d002df4 3764
2de970ff
JL		 3765 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3766
b647c35f
JL		 3767 spin_lock(&cifs_sb->tlink_tree_lock);
3768 while ((node = rb_first(root))) {
3769 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3770 cifs_get_tlink(tlink);
3771 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3772 rb_erase(node, root);
1da177e4 3773
b647c35f
JL		 3774 spin_unlock(&cifs_sb->tlink_tree_lock);
3775 cifs_put_tlink(tlink);
3776 spin_lock(&cifs_sb->tlink_tree_lock);
3777 }
3778 spin_unlock(&cifs_sb->tlink_tree_lock);
50c2f753 3779
dd854466 3780 bdi_destroy(&cifs_sb->bdi);
d757d71b
AV		 3781 kfree(cifs_sb->mountdata);
3782 unload_nls(cifs_sb->local_nls);
3783 kfree(cifs_sb);
50c2f753 3784}
1da177e4 3785
286170aa
PS		 3786int
3787cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
1da177e4
LT		 3788{
3789 int rc = 0;
198b5682 3790 struct TCP_Server_Info *server = ses->server;
1da177e4 3791
286170aa
PS		 3792 if (!server->ops->need_neg || !server->ops->negotiate)
3793 return -ENOSYS;
3794
198b5682 3795 /* only send once per connect */
286170aa 3796 if (!server->ops->need_neg(server))
198b5682
JL		 3797 return 0;
3798
45275789 3799 set_credits(server, 1);
286170aa
PS		 3800
3801 rc = server->ops->negotiate(xid, ses);
198b5682
JL		 3802 if (rc == 0) {
3803 spin_lock(&GlobalMid_Lock);
7fdbaa1b 3804 if (server->tcpStatus == CifsNeedNegotiate)
198b5682
JL		 3805 server->tcpStatus = CifsGood;
3806 else
3807 rc = -EHOSTDOWN;
3808 spin_unlock(&GlobalMid_Lock);
198b5682
JL		 3809 }
3810
3811 return rc;
3812}
3813
58c45c58
PS		 3814int
3815cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3816 struct nls_table *nls_info)
198b5682 3817{
58c45c58 3818 int rc = -ENOSYS;
198b5682 3819 struct TCP_Server_Info *server = ses->server;
26b994fa 3820
198b5682 3821 ses->capabilities = server->capabilities;
26b994fa 3822 if (linuxExtEnabled == 0)
29e20f9c 3823 ses->capabilities &= (~server->vals->cap_unix);
20418acd 3824
f96637be 3825 cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
96daf2b0 3826 server->sec_mode, server->capabilities, server->timeAdj);
cb7691b6 3827
58c45c58
PS		 3828 if (server->ops->sess_setup)
3829 rc = server->ops->sess_setup(xid, ses, nls_info);
3830
26b994fa 3831 if (rc) {
f96637be 3832 cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
26b994fa 3833 } else {
b13ce4bb 3834 mutex_lock(&server->srv_mutex);
5d0d2882 3835 if (!server->session_estab) {
21e73393 3836 server->session_key.response = ses->auth_key.response;
5d0d2882 3837 server->session_key.len = ses->auth_key.len;
21e73393
SP		 3838 server->sequence_number = 0x2;
3839 server->session_estab = true;
3840 ses->auth_key.response = NULL;
e65a5cb4
SF		 3841 if (server->ops->generate_signingkey)
3842 server->ops->generate_signingkey(server);
5d0d2882
SP		 3843 }
3844 mutex_unlock(&server->srv_mutex);
3845
f96637be 3846 cifs_dbg(FYI, "CIFS Session Established successfully\n");
20418acd 3847 spin_lock(&GlobalMid_Lock);
198b5682
JL		 3848 ses->status = CifsGood;
3849 ses->need_reconnect = false;
20418acd 3850 spin_unlock(&GlobalMid_Lock);
1da177e4 3851 }
26b994fa 3852
21e73393
SP		 3853 kfree(ses->auth_key.response);
3854 ses->auth_key.response = NULL;
3855 ses->auth_key.len = 0;
d3686d54
SP		 3856 kfree(ses->ntlmssp);
3857 ses->ntlmssp = NULL;
21e73393 3858
1da177e4
LT		 3859 return rc;
3860}
3861
8a8798a5
JL		 3862static int
3863cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3864{
3f618223
JL		 3865 vol->sectype = ses->sectype;
3866
3867 /* krb5 is special, since we don't need username or pw */
3868 if (vol->sectype == Kerberos)
8a8798a5 3869 return 0;
8a8798a5
JL		 3870
3871 return cifs_set_cifscreds(vol, ses);
3872}
3873
96daf2b0 3874static struct cifs_tcon *
6d4a0832 3875cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
9d002df4 3876{
8a8798a5 3877 int rc;
96daf2b0
SF		 3878 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3879 struct cifs_ses *ses;
3880 struct cifs_tcon *tcon = NULL;
9d002df4 3881 struct smb_vol *vol_info;
9d002df4
JL		 3882
3883 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
803ab977
DC		 3884 if (vol_info == NULL)
3885 return ERR_PTR(-ENOMEM);
9d002df4 3886
9d002df4
JL		 3887 vol_info->local_nls = cifs_sb->local_nls;
3888 vol_info->linux_uid = fsuid;
3889 vol_info->cred_uid = fsuid;
3890 vol_info->UNC = master_tcon->treeName;
3891 vol_info->retry = master_tcon->retry;
3892 vol_info->nocase = master_tcon->nocase;
3893 vol_info->local_lease = master_tcon->local_lease;
3894 vol_info->no_linux_ext = !master_tcon->unix_ext;
28e11bd8
JL		 3895 vol_info->sectype = master_tcon->ses->sectype;
3896 vol_info->sign = master_tcon->ses->sign;
9d002df4 3897
8a8798a5
JL		 3898 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3899 if (rc) {
3900 tcon = ERR_PTR(rc);
3901 goto out;
3902 }
9d002df4
JL		 3903
3904 /* get a reference for the same TCP session */
3f9bcca7 3905 spin_lock(&cifs_tcp_ses_lock);
9d002df4 3906 ++master_tcon->ses->server->srv_count;
3f9bcca7 3907 spin_unlock(&cifs_tcp_ses_lock);
9d002df4
JL		 3908
3909 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3910 if (IS_ERR(ses)) {
96daf2b0 3911 tcon = (struct cifs_tcon *)ses;
9d002df4
JL		 3912 cifs_put_tcp_session(master_tcon->ses->server);
3913 goto out;
3914 }
3915
3916 tcon = cifs_get_tcon(ses, vol_info);
3917 if (IS_ERR(tcon)) {
3918 cifs_put_smb_ses(ses);
3919 goto out;
3920 }
3921
29e20f9c 3922 if (cap_unix(ses))
9d002df4
JL		 3923 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3924out:
8a8798a5
JL		 3925 kfree(vol_info->username);
3926 kfree(vol_info->password);
9d002df4
JL		 3927 kfree(vol_info);
3928
3929 return tcon;
3930}
3931
96daf2b0 3932struct cifs_tcon *
9d002df4
JL		 3933cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3934{
3935 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3936}
3937
3938static int
3939cifs_sb_tcon_pending_wait(void *unused)
3940{
3941 schedule();
3942 return signal_pending(current) ? -ERESTARTSYS : 0;
3943}
3944
b647c35f
JL		 3945/* find and return a tlink with given uid */
3946static struct tcon_link *
6d4a0832 3947tlink_rb_search(struct rb_root *root, kuid_t uid)
b647c35f
JL		 3948{
3949 struct rb_node *node = root->rb_node;
3950 struct tcon_link *tlink;
3951
3952 while (node) {
3953 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3954
6d4a0832 3955 if (uid_gt(tlink->tl_uid, uid))
b647c35f 3956 node = node->rb_left;
6d4a0832 3957 else if (uid_lt(tlink->tl_uid, uid))
b647c35f
JL		 3958 node = node->rb_right;
3959 else
3960 return tlink;
3961 }
3962 return NULL;
3963}
3964
3965/* insert a tcon_link into the tree */
3966static void
3967tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3968{
3969 struct rb_node **new = &(root->rb_node), *parent = NULL;
3970 struct tcon_link *tlink;
3971
3972 while (*new) {
3973 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3974 parent = *new;
3975
6d4a0832 3976 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
b647c35f
JL		 3977 new = &((*new)->rb_left);
3978 else
3979 new = &((*new)->rb_right);
3980 }
3981
3982 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3983 rb_insert_color(&new_tlink->tl_rbnode, root);
3984}
3985
9d002df4
JL		 3986/*
3987 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3988 * current task.
3989 *
3990 * If the superblock doesn't refer to a multiuser mount, then just return
3991 * the master tcon for the mount.
3992 *
6ef933a3 3993 * First, search the rbtree for an existing tcon for this fsuid. If one
9d002df4
JL		 3994 * exists, then check to see if it's pending construction. If it is then wait
3995 * for construction to complete. Once it's no longer pending, check to see if
3996 * it failed and either return an error or retry construction, depending on
3997 * the timeout.
3998 *
3999 * If one doesn't exist then insert a new tcon_link struct into the tree and
4000 * try to construct a new one.
4001 */
4002struct tcon_link *
4003cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4004{
4005 int ret;
6d4a0832 4006 kuid_t fsuid = current_fsuid();
9d002df4
JL		 4007 struct tcon_link *tlink, *newtlink;
4008
4009 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4010 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4011
4012 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 4013 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4014 if (tlink)
4015 cifs_get_tlink(tlink);
4016 spin_unlock(&cifs_sb->tlink_tree_lock);
4017
4018 if (tlink == NULL) {
4019 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4020 if (newtlink == NULL)
4021 return ERR_PTR(-ENOMEM);
b647c35f 4022 newtlink->tl_uid = fsuid;
9d002df4
JL		 4023 newtlink->tl_tcon = ERR_PTR(-EACCES);
4024 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4025 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4026 cifs_get_tlink(newtlink);
4027
9d002df4
JL		 4028 spin_lock(&cifs_sb->tlink_tree_lock);
4029 /* was one inserted after previous search? */
b647c35f 4030 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4031 if (tlink) {
4032 cifs_get_tlink(tlink);
4033 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4034 kfree(newtlink);
4035 goto wait_for_construction;
4036 }
9d002df4 4037 tlink = newtlink;
b647c35f
JL		 4038 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4039 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4040 } else {
4041wait_for_construction:
4042 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4043 cifs_sb_tcon_pending_wait,
4044 TASK_INTERRUPTIBLE);
4045 if (ret) {
4046 cifs_put_tlink(tlink);
4047 return ERR_PTR(ret);
4048 }
4049
4050 /* if it's good, return it */
4051 if (!IS_ERR(tlink->tl_tcon))
4052 return tlink;
4053
4054 /* return error if we tried this already recently */
4055 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4056 cifs_put_tlink(tlink);
4057 return ERR_PTR(-EACCES);
4058 }
4059
4060 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4061 goto wait_for_construction;
4062 }
4063
4064 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4065 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4066 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4067
4068 if (IS_ERR(tlink->tl_tcon)) {
4069 cifs_put_tlink(tlink);
4070 return ERR_PTR(-EACCES);
4071 }
4072
4073 return tlink;
4074}
2de970ff
JL		 4075
4076/*
4077 * periodic workqueue job that scans tcon_tree for a superblock and closes
4078 * out tcons.
4079 */
4080static void
4081cifs_prune_tlinks(struct work_struct *work)
4082{
4083 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4084 prune_tlinks.work);
b647c35f
JL		 4085 struct rb_root *root = &cifs_sb->tlink_tree;
4086 struct rb_node *node = rb_first(root);
4087 struct rb_node *tmp;
4088 struct tcon_link *tlink;
2de970ff 4089
b647c35f
JL		 4090 /*
4091 * Because we drop the spinlock in the loop in order to put the tlink
4092 * it's not guarded against removal of links from the tree. The only
4093 * places that remove entries from the tree are this function and
4094 * umounts. Because this function is non-reentrant and is canceled
4095 * before umount can proceed, this is safe.
4096 */
4097 spin_lock(&cifs_sb->tlink_tree_lock);
4098 node = rb_first(root);
4099 while (node != NULL) {
4100 tmp = node;
4101 node = rb_next(tmp);
4102 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4103
4104 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4105 atomic_read(&tlink->tl_count) != 0 ||
4106 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4107 continue;
2de970ff 4108
b647c35f
JL		 4109 cifs_get_tlink(tlink);
4110 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4111 rb_erase(tmp, root);
4112
4113 spin_unlock(&cifs_sb->tlink_tree_lock);
4114 cifs_put_tlink(tlink);
4115 spin_lock(&cifs_sb->tlink_tree_lock);
4116 }
4117 spin_unlock(&cifs_sb->tlink_tree_lock);
2de970ff 4118
da472fc8 4119 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 4120 TLINK_IDLE_EXPIRE);
4121}
Linux kernel - Deliverables
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