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Update headers to update various SMB3 ioctl definitions
[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 */
382 rc = generic_ip_connect(server);
fb8c4b14 383 if (rc) {
f96637be 384 cifs_dbg(FYI, "reconnect error %d\n", rc);
0cb766ae 385 msleep(3000);
1da177e4
LT		 386 } else {
387 atomic_inc(&tcpSesReconnectCount);
388 spin_lock(&GlobalMid_Lock);
469ee614 389 if (server->tcpStatus != CifsExiting)
fd88ce93 390 server->tcpStatus = CifsNeedNegotiate;
fb8c4b14 391 spin_unlock(&GlobalMid_Lock);
1da177e4 392 }
7fdbaa1b 393 } while (server->tcpStatus == CifsNeedReconnect);
2b84a36c 394
1da177e4
LT		 395 return rc;
396}
397
c74093b6
JL		 398static void
399cifs_echo_request(struct work_struct *work)
400{
401 int rc;
402 struct TCP_Server_Info *server = container_of(work,
403 struct TCP_Server_Info, echo.work);
404
247ec9b4 405 /*
f6d76178
PS		 406 * We cannot send an echo if it is disabled or until the
407 * NEGOTIATE_PROTOCOL request is done, which is indicated by
408 * server->ops->need_neg() == true. Also, no need to ping if
409 * we got a response recently.
247ec9b4 410 */
286170aa 411 if (!server->ops->need_neg || server->ops->need_neg(server) ||
f6d76178 412 (server->ops->can_echo && !server->ops->can_echo(server)) ||
247ec9b4 413 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
c74093b6
JL		 414 goto requeue_echo;
415
f6d76178 416 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
c74093b6 417 if (rc)
f96637be
JP		 418 cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
419 server->hostname);
c74093b6
JL		 420
421requeue_echo:
da472fc8 422 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
c74093b6
JL		 423}
424
3d9c2472 425static bool
2a37ef94 426allocate_buffers(struct TCP_Server_Info *server)
3d9c2472 427{
2a37ef94
JL		 428 if (!server->bigbuf) {
429 server->bigbuf = (char *)cifs_buf_get();
430 if (!server->bigbuf) {
f96637be 431 cifs_dbg(VFS, "No memory for large SMB response\n");
3d9c2472
PS		 432 msleep(3000);
433 /* retry will check if exiting */
434 return false;
435 }
2a37ef94 436 } else if (server->large_buf) {
3d9c2472 437 /* we are reusing a dirty large buf, clear its start */
1887f601 438 memset(server->bigbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 439 }
440
2a37ef94
JL		 441 if (!server->smallbuf) {
442 server->smallbuf = (char *)cifs_small_buf_get();
443 if (!server->smallbuf) {
f96637be 444 cifs_dbg(VFS, "No memory for SMB response\n");
3d9c2472
PS		 445 msleep(1000);
446 /* retry will check if exiting */
447 return false;
448 }
449 /* beginning of smb buffer is cleared in our buf_get */
450 } else {
451 /* if existing small buf clear beginning */
1887f601 452 memset(server->smallbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 453 }
454
3d9c2472
PS		 455 return true;
456}
457
ba749e6d
JL		 458static bool
459server_unresponsive(struct TCP_Server_Info *server)
460{
6dae51a5
PS		 461 /*
462 * We need to wait 2 echo intervals to make sure we handle such
463 * situations right:
464 * 1s client sends a normal SMB request
465 * 2s client gets a response
466 * 30s echo workqueue job pops, and decides we got a response recently
467 * and don't need to send another
468 * ...
469 * 65s kernel_recvmsg times out, and we see that we haven't gotten
470 * a response in >60s.
471 */
472 if (server->tcpStatus == CifsGood &&
473 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
f96637be
JP		 474 cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n",
475 server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ);
ba749e6d
JL		 476 cifs_reconnect(server);
477 wake_up(&server->response_q);
478 return true;
479 }
480
481 return false;
482}
483
42c4dfc2
JL		 484/*
485 * kvec_array_init - clone a kvec array, and advance into it
486 * @new: pointer to memory for cloned array
487 * @iov: pointer to original array
488 * @nr_segs: number of members in original array
489 * @bytes: number of bytes to advance into the cloned array
490 *
491 * This function will copy the array provided in iov to a section of memory
492 * and advance the specified number of bytes into the new array. It returns
493 * the number of segments in the new array. "new" must be at least as big as
494 * the original iov array.
495 */
496static unsigned int
497kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
498 size_t bytes)
499{
500 size_t base = 0;
501
502 while (bytes || !iov->iov_len) {
503 int copy = min(bytes, iov->iov_len);
504
505 bytes -= copy;
506 base += copy;
507 if (iov->iov_len == base) {
508 iov++;
509 nr_segs--;
510 base = 0;
511 }
512 }
513 memcpy(new, iov, sizeof(*iov) * nr_segs);
514 new->iov_base += base;
515 new->iov_len -= base;
516 return nr_segs;
517}
518
1041e3f9
JL		 519static struct kvec *
520get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
e7015fb1 521{
1041e3f9
JL		 522 struct kvec *new_iov;
523
524 if (server->iov && nr_segs <= server->nr_iov)
525 return server->iov;
526
527 /* not big enough -- allocate a new one and release the old */
528 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
529 if (new_iov) {
530 kfree(server->iov);
531 server->iov = new_iov;
532 server->nr_iov = nr_segs;
533 }
534 return new_iov;
535}
536
e28bc5b1
JL		 537int
538cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
539 unsigned int nr_segs, unsigned int to_read)
e7015fb1 540{
a52c1eb7
JL		 541 int length = 0;
542 int total_read;
42c4dfc2 543 unsigned int segs;
e831e6cf 544 struct msghdr smb_msg;
42c4dfc2
JL		 545 struct kvec *iov;
546
1041e3f9 547 iov = get_server_iovec(server, nr_segs);
42c4dfc2
JL		 548 if (!iov)
549 return -ENOMEM;
e7015fb1 550
e831e6cf
JL		 551 smb_msg.msg_control = NULL;
552 smb_msg.msg_controllen = 0;
553
a52c1eb7 554 for (total_read = 0; to_read; total_read += length, to_read -= length) {
95edcff4
JL		 555 try_to_freeze();
556
ba749e6d 557 if (server_unresponsive(server)) {
a52c1eb7 558 total_read = -EAGAIN;
ba749e6d
JL		 559 break;
560 }
561
42c4dfc2
JL		 562 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
563
564 length = kernel_recvmsg(server->ssocket, &smb_msg,
565 iov, segs, to_read, 0);
e7015fb1 566
e7015fb1 567 if (server->tcpStatus == CifsExiting) {
a52c1eb7 568 total_read = -ESHUTDOWN;
e7015fb1
PS		 569 break;
570 } else if (server->tcpStatus == CifsNeedReconnect) {
571 cifs_reconnect(server);
a52c1eb7 572 total_read = -EAGAIN;
e7015fb1
PS		 573 break;
574 } else if (length == -ERESTARTSYS ||
575 length == -EAGAIN ||
576 length == -EINTR) {
577 /*
578 * Minimum sleep to prevent looping, allowing socket
579 * to clear and app threads to set tcpStatus
580 * CifsNeedReconnect if server hung.
581 */
582 usleep_range(1000, 2000);
583 length = 0;
a52c1eb7 584 continue;
e7015fb1 585 } else if (length <= 0) {
f96637be
JP		 586 cifs_dbg(FYI, "Received no data or error: expecting %d\n"
587 "got %d", to_read, length);
e7015fb1 588 cifs_reconnect(server);
a52c1eb7 589 total_read = -EAGAIN;
e7015fb1
PS		 590 break;
591 }
592 }
a52c1eb7 593 return total_read;
e7015fb1 594}
e7015fb1 595
e28bc5b1
JL		 596int
597cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
598 unsigned int to_read)
42c4dfc2
JL		 599{
600 struct kvec iov;
601
602 iov.iov_base = buf;
603 iov.iov_len = to_read;
604
e28bc5b1 605 return cifs_readv_from_socket(server, &iov, 1, to_read);
e7015fb1
PS		 606}
607
98bac62c 608static bool
fe11e4cc 609is_smb_response(struct TCP_Server_Info *server, unsigned char type)
98bac62c 610{
98bac62c
PS		 611 /*
612 * The first byte big endian of the length field,
613 * is actually not part of the length but the type
614 * with the most common, zero, as regular data.
615 */
fe11e4cc
JL		 616 switch (type) {
617 case RFC1002_SESSION_MESSAGE:
618 /* Regular SMB response */
619 return true;
620 case RFC1002_SESSION_KEEP_ALIVE:
f96637be 621 cifs_dbg(FYI, "RFC 1002 session keep alive\n");
fe11e4cc
JL		 622 break;
623 case RFC1002_POSITIVE_SESSION_RESPONSE:
f96637be 624 cifs_dbg(FYI, "RFC 1002 positive session response\n");
fe11e4cc
JL		 625 break;
626 case RFC1002_NEGATIVE_SESSION_RESPONSE:
98bac62c
PS		 627 /*
628 * We get this from Windows 98 instead of an error on
629 * SMB negprot response.
630 */
f96637be 631 cifs_dbg(FYI, "RFC 1002 negative session response\n");
98bac62c
PS		 632 /* give server a second to clean up */
633 msleep(1000);
634 /*
635 * Always try 445 first on reconnect since we get NACK
636 * on some if we ever connected to port 139 (the NACK
637 * is since we do not begin with RFC1001 session
638 * initialize frame).
639 */
fe11e4cc 640 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
98bac62c
PS		 641 cifs_reconnect(server);
642 wake_up(&server->response_q);
fe11e4cc
JL		 643 break;
644 default:
f96637be 645 cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
98bac62c 646 cifs_reconnect(server);
98bac62c
PS		 647 }
648
fe11e4cc 649 return false;
98bac62c
PS		 650}
651
e28bc5b1
JL		 652void
653dequeue_mid(struct mid_q_entry *mid, bool malformed)
ea1f4502 654{
ad69bae1 655#ifdef CONFIG_CIFS_STATS2
ea1f4502 656 mid->when_received = jiffies;
ad69bae1 657#endif
ea1f4502
JL		 658 spin_lock(&GlobalMid_Lock);
659 if (!malformed)
7c9421e1 660 mid->mid_state = MID_RESPONSE_RECEIVED;
ea1f4502 661 else
7c9421e1 662 mid->mid_state = MID_RESPONSE_MALFORMED;
ea1f4502 663 list_del_init(&mid->qhead);
ad69bae1 664 spin_unlock(&GlobalMid_Lock);
ea1f4502 665}
ad69bae1 666
c8054ebd
JL		 667static void
668handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
d4e4854f 669 char *buf, int malformed)
ea1f4502 670{
316cf94a
PS		 671 if (server->ops->check_trans2 &&
672 server->ops->check_trans2(mid, server, buf, malformed))
c8054ebd 673 return;
ea1f4502 674 mid->resp_buf = buf;
7c9421e1 675 mid->large_buf = server->large_buf;
2a37ef94
JL		 676 /* Was previous buf put in mpx struct for multi-rsp? */
677 if (!mid->multiRsp) {
678 /* smb buffer will be freed by user thread */
679 if (server->large_buf)
680 server->bigbuf = NULL;
681 else
682 server->smallbuf = NULL;
683 }
ffc00e27 684 dequeue_mid(mid, malformed);
ad69bae1
PS		 685}
686
762dfd10
PS		 687static void clean_demultiplex_info(struct TCP_Server_Info *server)
688{
689 int length;
690
691 /* take it off the list, if it's not already */
692 spin_lock(&cifs_tcp_ses_lock);
693 list_del_init(&server->tcp_ses_list);
694 spin_unlock(&cifs_tcp_ses_lock);
695
696 spin_lock(&GlobalMid_Lock);
697 server->tcpStatus = CifsExiting;
698 spin_unlock(&GlobalMid_Lock);
699 wake_up_all(&server->response_q);
700
2d86dbc9 701 /* check if we have blocked requests that need to free */
fc40f9cf 702 spin_lock(&server->req_lock);
2d86dbc9
PS		 703 if (server->credits <= 0)
704 server->credits = 1;
fc40f9cf 705 spin_unlock(&server->req_lock);
762dfd10
PS		 706 /*
707 * Although there should not be any requests blocked on this queue it
708 * can not hurt to be paranoid and try to wake up requests that may
709 * haven been blocked when more than 50 at time were on the wire to the
710 * same server - they now will see the session is in exit state and get
711 * out of SendReceive.
712 */
713 wake_up_all(&server->request_q);
714 /* give those requests time to exit */
715 msleep(125);
716
717 if (server->ssocket) {
718 sock_release(server->ssocket);
719 server->ssocket = NULL;
720 }
721
722 if (!list_empty(&server->pending_mid_q)) {
723 struct list_head dispose_list;
724 struct mid_q_entry *mid_entry;
725 struct list_head *tmp, *tmp2;
726
727 INIT_LIST_HEAD(&dispose_list);
728 spin_lock(&GlobalMid_Lock);
729 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
730 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
f96637be 731 cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid);
7c9421e1 732 mid_entry->mid_state = MID_SHUTDOWN;
762dfd10
PS		 733 list_move(&mid_entry->qhead, &dispose_list);
734 }
735 spin_unlock(&GlobalMid_Lock);
736
737 /* now walk dispose list and issue callbacks */
738 list_for_each_safe(tmp, tmp2, &dispose_list) {
739 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
f96637be 740 cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid);
762dfd10
PS		 741 list_del_init(&mid_entry->qhead);
742 mid_entry->callback(mid_entry);
743 }
744 /* 1/8th of sec is more than enough time for them to exit */
745 msleep(125);
746 }
747
748 if (!list_empty(&server->pending_mid_q)) {
749 /*
750 * mpx threads have not exited yet give them at least the smb
751 * send timeout time for long ops.
752 *
753 * Due to delays on oplock break requests, we need to wait at
754 * least 45 seconds before giving up on a request getting a
755 * response and going ahead and killing cifsd.
756 */
f96637be 757 cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
762dfd10
PS		 758 msleep(46000);
759 /*
760 * If threads still have not exited they are probably never
761 * coming home not much else we can do but free the memory.
762 */
763 }
764
765 kfree(server->hostname);
1041e3f9 766 kfree(server->iov);
762dfd10
PS		 767 kfree(server);
768
769 length = atomic_dec_return(&tcpSesAllocCount);
770 if (length > 0)
771 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
772 GFP_KERNEL);
773}
774
e9097ab4
JL		 775static int
776standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
777{
778 int length;
779 char *buf = server->smallbuf;
d4e4854f 780 unsigned int pdu_length = get_rfc1002_length(buf);
e9097ab4
JL		 781
782 /* make sure this will fit in a large buffer */
1887f601 783 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
f96637be 784 cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
e9097ab4
JL		 785 cifs_reconnect(server);
786 wake_up(&server->response_q);
787 return -EAGAIN;
788 }
789
790 /* switch to large buffer if too big for a small one */
791 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
792 server->large_buf = true;
d4e4854f 793 memcpy(server->bigbuf, buf, server->total_read);
e9097ab4 794 buf = server->bigbuf;
e9097ab4
JL		 795 }
796
797 /* now read the rest */
1887f601
PS		 798 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
799 pdu_length - HEADER_SIZE(server) + 1 + 4);
e9097ab4
JL		 800 if (length < 0)
801 return length;
802 server->total_read += length;
803
d4e4854f 804 dump_smb(buf, server->total_read);
e9097ab4
JL		 805
806 /*
807 * We know that we received enough to get to the MID as we
808 * checked the pdu_length earlier. Now check to see
809 * if the rest of the header is OK. We borrow the length
810 * var for the rest of the loop to avoid a new stack var.
811 *
812 * 48 bytes is enough to display the header and a little bit
813 * into the payload for debugging purposes.
814 */
8aa26f3e 815 length = server->ops->check_message(buf, server->total_read);
e9097ab4
JL		 816 if (length != 0)
817 cifs_dump_mem("Bad SMB: ", buf,
818 min_t(unsigned int, server->total_read, 48));
819
2e44b288
PS		 820 if (server->ops->is_status_pending &&
821 server->ops->is_status_pending(buf, server, length))
822 return -1;
823
ff4fa4a2
JL		 824 if (!mid)
825 return length;
e9097ab4 826
d4e4854f 827 handle_mid(mid, server, buf, length);
ff4fa4a2 828 return 0;
e9097ab4
JL		 829}
830
1da177e4 831static int
7c97c200 832cifs_demultiplex_thread(void *p)
1da177e4
LT		 833{
834 int length;
7c97c200 835 struct TCP_Server_Info *server = p;
2a37ef94
JL		 836 unsigned int pdu_length;
837 char *buf = NULL;
1da177e4
LT		 838 struct task_struct *task_to_wake = NULL;
839 struct mid_q_entry *mid_entry;
1da177e4 840
1da177e4 841 current->flags |= PF_MEMALLOC;
f96637be 842 cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
93d0ec85
JL		 843
844 length = atomic_inc_return(&tcpSesAllocCount);
845 if (length > 1)
26f57364
SF		 846 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
847 GFP_KERNEL);
1da177e4 848
83144186 849 set_freezable();
469ee614 850 while (server->tcpStatus != CifsExiting) {
ede1327e
SF		 851 if (try_to_freeze())
852 continue;
b8643e1b 853
2a37ef94 854 if (!allocate_buffers(server))
3d9c2472 855 continue;
b8643e1b 856
2a37ef94 857 server->large_buf = false;
2a37ef94 858 buf = server->smallbuf;
f01d5e14 859 pdu_length = 4; /* enough to get RFC1001 header */
fda35943 860
e28bc5b1 861 length = cifs_read_from_socket(server, buf, pdu_length);
a52c1eb7 862 if (length < 0)
1da177e4 863 continue;
2a37ef94 864 server->total_read = length;
1da177e4 865
98bac62c
PS		 866 /*
867 * The right amount was read from socket - 4 bytes,
868 * so we can now interpret the length field.
869 */
d4e4854f 870 pdu_length = get_rfc1002_length(buf);
70ca734a 871
f96637be 872 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
fe11e4cc 873 if (!is_smb_response(server, buf[0]))
fb8c4b14 874 continue;
e4eb295d 875
89482a56 876 /* make sure we have enough to get to the MID */
1887f601 877 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
f96637be
JP		 878 cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
879 pdu_length);
89482a56
JL		 880 cifs_reconnect(server);
881 wake_up(&server->response_q);
882 continue;
e4eb295d 883 }
e7015fb1 884
89482a56 885 /* read down to the MID */
e28bc5b1 886 length = cifs_read_from_socket(server, buf + 4,
1887f601 887 HEADER_SIZE(server) - 1 - 4);
89482a56 888 if (length < 0)
e4eb295d 889 continue;
2a37ef94 890 server->total_read += length;
1da177e4 891
8aa26f3e 892 mid_entry = server->ops->find_mid(server, buf);
50c2f753 893
44d22d84
JL		 894 if (!mid_entry || !mid_entry->receive)
895 length = standard_receive3(server, mid_entry);
896 else
897 length = mid_entry->receive(server, mid_entry);
71823baf 898
e9097ab4 899 if (length < 0)
fe11e4cc 900 continue;
1da177e4 901
d4e4854f 902 if (server->large_buf)
2a37ef94 903 buf = server->bigbuf;
fda35943 904
fda35943 905 server->lstrp = jiffies;
2b84a36c 906 if (mid_entry != NULL) {
2a37ef94
JL		 907 if (!mid_entry->multiRsp || mid_entry->multiEnd)
908 mid_entry->callback(mid_entry);
7f0adb53
PS		 909 } else if (!server->ops->is_oplock_break ||
910 !server->ops->is_oplock_break(buf, server)) {
f96637be
JP		 911 cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
912 atomic_read(&midCount));
1887f601
PS		 913 cifs_dump_mem("Received Data is: ", buf,
914 HEADER_SIZE(server));
3979877e 915#ifdef CONFIG_CIFS_DEBUG2
7f0adb53
PS		 916 if (server->ops->dump_detail)
917 server->ops->dump_detail(buf);
3979877e
SF		 918 cifs_dump_mids(server);
919#endif /* CIFS_DEBUG2 */
50c2f753 920
e4eb295d
SF		 921 }
922 } /* end while !EXITING */
923
fd62cb7e 924 /* buffer usually freed in free_mid - need to free it here on exit */
2a37ef94
JL		 925 cifs_buf_release(server->bigbuf);
926 if (server->smallbuf) /* no sense logging a debug message if NULL */
927 cifs_small_buf_release(server->smallbuf);
1da177e4 928
b1c8d2b4 929 task_to_wake = xchg(&server->tsk, NULL);
762dfd10 930 clean_demultiplex_info(server);
50c2f753 931
b1c8d2b4
JL		 932 /* if server->tsk was NULL then wait for a signal before exiting */
933 if (!task_to_wake) {
934 set_current_state(TASK_INTERRUPTIBLE);
935 while (!signal_pending(current)) {
936 schedule();
937 set_current_state(TASK_INTERRUPTIBLE);
938 }
939 set_current_state(TASK_RUNNING);
940 }
941
0468a2cf 942 module_put_and_exit(0);
1da177e4
LT		 943}
944
c359cf3c
JL		 945/* extract the host portion of the UNC string */
946static char *
947extract_hostname(const char *unc)
948{
949 const char *src;
950 char *dst, *delim;
951 unsigned int len;
952
953 /* skip double chars at beginning of string */
954 /* BB: check validity of these bytes? */
955 src = unc + 2;
956
957 /* delimiter between hostname and sharename is always '\\' now */
958 delim = strchr(src, '\\');
959 if (!delim)
960 return ERR_PTR(-EINVAL);
961
962 len = delim - src;
963 dst = kmalloc((len + 1), GFP_KERNEL);
964 if (dst == NULL)
965 return ERR_PTR(-ENOMEM);
966
967 memcpy(dst, src, len);
968 dst[len] = '\0';
969
970 return dst;
971}
972
8830d7e0
SP		 973static int get_option_ul(substring_t args[], unsigned long *option)
974{
975 int rc;
976 char *string;
977
978 string = match_strdup(args);
979 if (string == NULL)
980 return -ENOMEM;
bfa890a3 981 rc = kstrtoul(string, 0, option);
8830d7e0
SP		 982 kfree(string);
983
984 return rc;
985}
986
3da46565
EB		 987static int get_option_uid(substring_t args[], kuid_t *result)
988{
989 unsigned long value;
990 kuid_t uid;
991 int rc;
992
993 rc = get_option_ul(args, &value);
994 if (rc)
995 return rc;
996
997 uid = make_kuid(current_user_ns(), value);
998 if (!uid_valid(uid))
999 return -EINVAL;
1000
1001 *result = uid;
1002 return 0;
1003}
1004
1005static int get_option_gid(substring_t args[], kgid_t *result)
1006{
1007 unsigned long value;
1008 kgid_t gid;
1009 int rc;
1010
1011 rc = get_option_ul(args, &value);
1012 if (rc)
1013 return rc;
1014
1015 gid = make_kgid(current_user_ns(), value);
1016 if (!gid_valid(gid))
1017 return -EINVAL;
1018
1019 *result = gid;
1020 return 0;
1021}
8830d7e0
SP		 1022
1023static int cifs_parse_security_flavors(char *value,
1024 struct smb_vol *vol)
1025{
1026
1027 substring_t args[MAX_OPT_ARGS];
1028
1e3cc57e
JL		 1029 /*
1030 * With mount options, the last one should win. Reset any existing
1031 * settings back to default.
1032 */
1033 vol->sectype = Unspecified;
1034 vol->sign = false;
1035
8830d7e0 1036 switch (match_token(value, cifs_secflavor_tokens, args)) {
3f618223
JL		 1037 case Opt_sec_krb5p:
1038 cifs_dbg(VFS, "sec=krb5p is not supported!\n");
1039 return 1;
1040 case Opt_sec_krb5i:
1041 vol->sign = true;
1042 /* Fallthrough */
8830d7e0 1043 case Opt_sec_krb5:
1e3cc57e 1044 vol->sectype = Kerberos;
8830d7e0 1045 break;
3f618223 1046 case Opt_sec_ntlmsspi:
1e3cc57e 1047 vol->sign = true;
3f618223 1048 /* Fallthrough */
8830d7e0 1049 case Opt_sec_ntlmssp:
1e3cc57e 1050 vol->sectype = RawNTLMSSP;
8830d7e0 1051 break;
3f618223 1052 case Opt_sec_ntlmi:
1e3cc57e 1053 vol->sign = true;
3f618223 1054 /* Fallthrough */
8830d7e0 1055 case Opt_ntlm:
1e3cc57e 1056 vol->sectype = NTLM;
8830d7e0 1057 break;
3f618223 1058 case Opt_sec_ntlmv2i:
1e3cc57e 1059 vol->sign = true;
3f618223 1060 /* Fallthrough */
7659624f 1061 case Opt_sec_ntlmv2:
1e3cc57e 1062 vol->sectype = NTLMv2;
8830d7e0
SP		 1063 break;
1064#ifdef CONFIG_CIFS_WEAK_PW_HASH
1065 case Opt_sec_lanman:
1e3cc57e 1066 vol->sectype = LANMAN;
8830d7e0
SP		 1067 break;
1068#endif
1069 case Opt_sec_none:
1070 vol->nullauth = 1;
1071 break;
1072 default:
f96637be 1073 cifs_dbg(VFS, "bad security option: %s\n", value);
8830d7e0
SP		 1074 return 1;
1075 }
1076
1077 return 0;
1078}
1079
15b6a473
JL		 1080static int
1081cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1082{
1083 substring_t args[MAX_OPT_ARGS];
1084
1085 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1086 case Opt_cache_loose:
1087 vol->direct_io = false;
1088 vol->strict_io = false;
1089 break;
1090 case Opt_cache_strict:
1091 vol->direct_io = false;
1092 vol->strict_io = true;
1093 break;
1094 case Opt_cache_none:
1095 vol->direct_io = true;
1096 vol->strict_io = false;
1097 break;
1098 default:
f96637be 1099 cifs_dbg(VFS, "bad cache= option: %s\n", value);
15b6a473
JL		 1100 return 1;
1101 }
1102 return 0;
1103}
1104
23db65f5
JL		 1105static int
1106cifs_parse_smb_version(char *value, struct smb_vol *vol)
1107{
1108 substring_t args[MAX_OPT_ARGS];
1109
1110 switch (match_token(value, cifs_smb_version_tokens, args)) {
1111 case Smb_1:
1112 vol->ops = &smb1_operations;
1113 vol->vals = &smb1_values;
1114 break;
1080ef75 1115#ifdef CONFIG_CIFS_SMB2
dd446b16
SF		 1116 case Smb_20:
1117 vol->ops = &smb21_operations; /* currently identical with 2.1 */
1118 vol->vals = &smb20_values;
1119 break;
1080ef75
SF		 1120 case Smb_21:
1121 vol->ops = &smb21_operations;
1122 vol->vals = &smb21_values;
1123 break;
e4aa25e7 1124 case Smb_30:
38107d45 1125 vol->ops = &smb30_operations;
e4aa25e7
SF		 1126 vol->vals = &smb30_values;
1127 break;
20b6d8b4
SF		 1128 case Smb_302:
1129 vol->ops = &smb30_operations; /* currently identical with 3.0 */
1130 vol->vals = &smb302_values;
1131 break;
1080ef75 1132#endif
23db65f5 1133 default:
f96637be 1134 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
23db65f5
JL		 1135 return 1;
1136 }
1137 return 0;
1138}
1139
d387a5c5
JL		 1140/*
1141 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1142 * fields with the result. Returns 0 on success and an error otherwise.
1143 */
1144static int
1145cifs_parse_devname(const char *devname, struct smb_vol *vol)
1146{
1147 char *pos;
1148 const char *delims = "/\\";
1149 size_t len;
1150
1151 /* make sure we have a valid UNC double delimiter prefix */
1152 len = strspn(devname, delims);
1153 if (len != 2)
1154 return -EINVAL;
1155
1156 /* find delimiter between host and sharename */
1157 pos = strpbrk(devname + 2, delims);
1158 if (!pos)
1159 return -EINVAL;
1160
1161 /* skip past delimiter */
1162 ++pos;
1163
1164 /* now go until next delimiter or end of string */
1165 len = strcspn(pos, delims);
1166
1167 /* move "pos" up to delimiter or NULL */
1168 pos += len;
1169 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1170 if (!vol->UNC)
1171 return -ENOMEM;
1172
1173 convert_delimiter(vol->UNC, '\\');
1174
1175 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1176 if (!*pos++ || !*pos)
1177 return 0;
1178
1179 vol->prepath = kstrdup(pos, GFP_KERNEL);
1180 if (!vol->prepath)
1181 return -ENOMEM;
1182
1183 return 0;
1184}
1185
1da177e4 1186static int
b946845a 1187cifs_parse_mount_options(const char *mountdata, const char *devname,
50c2f753 1188 struct smb_vol *vol)
1da177e4 1189{
8830d7e0 1190 char *data, *end;
957df453 1191 char *mountdata_copy = NULL, *options;
1da177e4
LT		 1192 unsigned int temp_len, i, j;
1193 char separator[2];
9b9d6b24
JL		 1194 short int override_uid = -1;
1195 short int override_gid = -1;
1196 bool uid_specified = false;
1197 bool gid_specified = false;
d8162558
JL		 1198 bool sloppy = false;
1199 char *invalid = NULL;
88463999 1200 char *nodename = utsname()->nodename;
8830d7e0
SP		 1201 char *string = NULL;
1202 char *tmp_end, *value;
1203 char delim;
b979aaa1
JL		 1204 bool got_ip = false;
1205 unsigned short port = 0;
1206 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1da177e4
LT		 1207
1208 separator[0] = ',';
50c2f753 1209 separator[1] = 0;
8830d7e0 1210 delim = separator[0];
1da177e4 1211
6ee9542a
JL		 1212 /* ensure we always start with zeroed-out smb_vol */
1213 memset(vol, 0, sizeof(*vol));
1214
88463999
JL		 1215 /*
1216 * does not have to be perfect mapping since field is
1217 * informational, only used for servers that do not support
1218 * port 445 and it can be overridden at mount time
1219 */
1397f2ee
JL		 1220 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1221 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
88463999
JL		 1222 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1223
1397f2ee 1224 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
a10faeb2
SF		 1225 /* null target name indicates to use *SMBSERVR default called name
1226 if we end up sending RFC1001 session initialize */
1227 vol->target_rfc1001_name[0] = 0;
3e4b3e1f
JL		 1228 vol->cred_uid = current_uid();
1229 vol->linux_uid = current_uid();
a001e5b5 1230 vol->linux_gid = current_gid();
f55ed1a8
JL		 1231
1232 /* default to only allowing write access to owner of the mount */
1233 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1da177e4
LT		 1234
1235 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
ac67055e
JA		 1236 /* default is always to request posix paths. */
1237 vol->posix_paths = 1;
a0c9217f
JL		 1238 /* default to using server inode numbers where available */
1239 vol->server_ino = 1;
ac67055e 1240
1b359204
JL		 1241 /* default is to use strict cifs caching semantics */
1242 vol->strict_io = true;
1243
6d20e840
SJ		 1244 vol->actimeo = CIFS_DEF_ACTIMEO;
1245
23db65f5
JL		 1246 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1247 vol->ops = &smb1_operations;
1248 vol->vals = &smb1_values;
1249
b946845a
SF		 1250 if (!mountdata)
1251 goto cifs_parse_mount_err;
1252
1253 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1254 if (!mountdata_copy)
1255 goto cifs_parse_mount_err;
1da177e4 1256
b946845a 1257 options = mountdata_copy;
4906e50b 1258 end = options + strlen(options);
8830d7e0 1259
50c2f753 1260 if (strncmp(options, "sep=", 4) == 0) {
fb8c4b14 1261 if (options[4] != 0) {
1da177e4
LT		 1262 separator[0] = options[4];
1263 options += 5;
1264 } else {
f96637be 1265 cifs_dbg(FYI, "Null separator not allowed\n");
1da177e4
LT		 1266 }
1267 }
3d3ea8e6
SP		 1268 vol->backupuid_specified = false; /* no backup intent for a user */
1269 vol->backupgid_specified = false; /* no backup intent for a group */
50c2f753 1270
37d4f99b
JL		 1271 switch (cifs_parse_devname(devname, vol)) {
1272 case 0:
1273 break;
1274 case -ENOMEM:
1275 cifs_dbg(VFS, "Unable to allocate memory for devname.\n");
1276 goto cifs_parse_mount_err;
1277 case -EINVAL:
1278 cifs_dbg(VFS, "Malformed UNC in devname.\n");
1279 goto cifs_parse_mount_err;
1280 default:
1281 cifs_dbg(VFS, "Unknown error parsing devname.\n");
1282 goto cifs_parse_mount_err;
d387a5c5
JL		 1283 }
1284
1da177e4 1285 while ((data = strsep(&options, separator)) != NULL) {
8830d7e0
SP		 1286 substring_t args[MAX_OPT_ARGS];
1287 unsigned long option;
1288 int token;
1289
1da177e4
LT		 1290 if (!*data)
1291 continue;
1da177e4 1292
8830d7e0
SP		 1293 token = match_token(data, cifs_mount_option_tokens, args);
1294
1295 switch (token) {
1296
1297 /* Ingnore the following */
1298 case Opt_ignore:
1299 break;
1300
1301 /* Boolean values */
1302 case Opt_user_xattr:
1da177e4 1303 vol->no_xattr = 0;
8830d7e0
SP		 1304 break;
1305 case Opt_nouser_xattr:
1da177e4 1306 vol->no_xattr = 1;
8830d7e0
SP		 1307 break;
1308 case Opt_forceuid:
9b9d6b24 1309 override_uid = 1;
8830d7e0
SP		 1310 break;
1311 case Opt_noforceuid:
9b9d6b24 1312 override_uid = 0;
8830d7e0 1313 break;
72bd481f
JL		 1314 case Opt_forcegid:
1315 override_gid = 1;
1316 break;
1317 case Opt_noforcegid:
1318 override_gid = 0;
1319 break;
8830d7e0 1320 case Opt_noblocksend:
edf1ae40 1321 vol->noblocksnd = 1;
8830d7e0
SP		 1322 break;
1323 case Opt_noautotune:
edf1ae40 1324 vol->noautotune = 1;
8830d7e0
SP		 1325 break;
1326 case Opt_hard:
1da177e4 1327 vol->retry = 1;
8830d7e0
SP		 1328 break;
1329 case Opt_soft:
1da177e4 1330 vol->retry = 0;
8830d7e0
SP		 1331 break;
1332 case Opt_perm:
1da177e4 1333 vol->noperm = 0;
8830d7e0
SP		 1334 break;
1335 case Opt_noperm:
1da177e4 1336 vol->noperm = 1;
8830d7e0
SP		 1337 break;
1338 case Opt_mapchars:
6a0b4824 1339 vol->remap = 1;
8830d7e0
SP		 1340 break;
1341 case Opt_nomapchars:
6a0b4824 1342 vol->remap = 0;
8830d7e0
SP		 1343 break;
1344 case Opt_sfu:
50c2f753 1345 vol->sfu_emul = 1;
8830d7e0
SP		 1346 break;
1347 case Opt_nosfu:
50c2f753 1348 vol->sfu_emul = 0;
8830d7e0
SP		 1349 break;
1350 case Opt_nodfs:
2c1b8615 1351 vol->nodfs = 1;
8830d7e0
SP		 1352 break;
1353 case Opt_posixpaths:
ac67055e 1354 vol->posix_paths = 1;
8830d7e0
SP		 1355 break;
1356 case Opt_noposixpaths:
ac67055e 1357 vol->posix_paths = 0;
8830d7e0
SP		 1358 break;
1359 case Opt_nounix:
c18c842b 1360 vol->no_linux_ext = 1;
8830d7e0
SP		 1361 break;
1362 case Opt_nocase:
50c2f753 1363 vol->nocase = 1;
8830d7e0
SP		 1364 break;
1365 case Opt_brl:
c46fa8ac 1366 vol->nobrl = 0;
8830d7e0
SP		 1367 break;
1368 case Opt_nobrl:
c46fa8ac 1369 vol->nobrl = 1;
5cfdddcf
PS		 1370 /*
1371 * turn off mandatory locking in mode
8830d7e0 1372 * if remote locking is turned off since the
5cfdddcf
PS		 1373 * local vfs will do advisory
1374 */
50c2f753
SF		 1375 if (vol->file_mode ==
1376 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
d3485d37 1377 vol->file_mode = S_IALLUGO;
8830d7e0
SP		 1378 break;
1379 case Opt_forcemandatorylock:
13a6e42a 1380 vol->mand_lock = 1;
8830d7e0
SP		 1381 break;
1382 case Opt_setuids:
1da177e4 1383 vol->setuids = 1;
8830d7e0
SP		 1384 break;
1385 case Opt_nosetuids:
1da177e4 1386 vol->setuids = 0;
8830d7e0
SP		 1387 break;
1388 case Opt_dynperm:
d0a9c078 1389 vol->dynperm = true;
8830d7e0
SP		 1390 break;
1391 case Opt_nodynperm:
d0a9c078 1392 vol->dynperm = false;
8830d7e0
SP		 1393 break;
1394 case Opt_nohard:
1da177e4 1395 vol->retry = 0;
8830d7e0
SP		 1396 break;
1397 case Opt_nosoft:
1da177e4 1398 vol->retry = 1;
8830d7e0
SP		 1399 break;
1400 case Opt_nointr:
1da177e4 1401 vol->intr = 0;
8830d7e0
SP		 1402 break;
1403 case Opt_intr:
1da177e4 1404 vol->intr = 1;
8830d7e0
SP		 1405 break;
1406 case Opt_nostrictsync:
be652445 1407 vol->nostrictsync = 1;
8830d7e0
SP		 1408 break;
1409 case Opt_strictsync:
be652445 1410 vol->nostrictsync = 0;
8830d7e0
SP		 1411 break;
1412 case Opt_serverino:
1da177e4 1413 vol->server_ino = 1;
8830d7e0
SP		 1414 break;
1415 case Opt_noserverino:
1da177e4 1416 vol->server_ino = 0;
8830d7e0
SP		 1417 break;
1418 case Opt_rwpidforward:
d4ffff1f 1419 vol->rwpidforward = 1;
8830d7e0
SP		 1420 break;
1421 case Opt_cifsacl:
0a4b92c0 1422 vol->cifs_acl = 1;
8830d7e0
SP		 1423 break;
1424 case Opt_nocifsacl:
0a4b92c0 1425 vol->cifs_acl = 0;
8830d7e0
SP		 1426 break;
1427 case Opt_acl:
1da177e4 1428 vol->no_psx_acl = 0;
8830d7e0
SP		 1429 break;
1430 case Opt_noacl:
1da177e4 1431 vol->no_psx_acl = 1;
8830d7e0
SP		 1432 break;
1433 case Opt_locallease:
84210e91 1434 vol->local_lease = 1;
8830d7e0
SP		 1435 break;
1436 case Opt_sign:
1e3cc57e 1437 vol->sign = true;
8830d7e0
SP		 1438 break;
1439 case Opt_seal:
95b1cb90 1440 /* we do not do the following in secFlags because seal
8830d7e0
SP		 1441 * is a per tree connection (mount) not a per socket
1442 * or per-smb connection option in the protocol
1443 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1444 */
95b1cb90 1445 vol->seal = 1;
8830d7e0 1446 break;
8830d7e0 1447 case Opt_noac:
50c2f753
SF		 1448 printk(KERN_WARNING "CIFS: Mount option noac not "
1449 "supported. Instead set "
1450 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
8830d7e0
SP		 1451 break;
1452 case Opt_fsc:
607a569d 1453#ifndef CONFIG_CIFS_FSCACHE
f96637be 1454 cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
b946845a 1455 goto cifs_parse_mount_err;
607a569d 1456#endif
fa1df75d 1457 vol->fsc = true;
8830d7e0
SP		 1458 break;
1459 case Opt_mfsymlinks:
736a3320 1460 vol->mfsymlinks = true;
8830d7e0
SP		 1461 break;
1462 case Opt_multiuser:
0eb8a132 1463 vol->multiuser = true;
8830d7e0 1464 break;
d8162558
JL		 1465 case Opt_sloppy:
1466 sloppy = true;
1467 break;
a0b3df5c
JL		 1468 case Opt_nosharesock:
1469 vol->nosharesock = true;
1470 break;
8830d7e0
SP		 1471
1472 /* Numeric Values */
1473 case Opt_backupuid:
3da46565 1474 if (get_option_uid(args, &vol->backupuid)) {
f96637be
JP		 1475 cifs_dbg(VFS, "%s: Invalid backupuid value\n",
1476 __func__);
3d3ea8e6
SP		 1477 goto cifs_parse_mount_err;
1478 }
1479 vol->backupuid_specified = true;
8830d7e0
SP		 1480 break;
1481 case Opt_backupgid:
3da46565 1482 if (get_option_gid(args, &vol->backupgid)) {
f96637be
JP		 1483 cifs_dbg(VFS, "%s: Invalid backupgid value\n",
1484 __func__);
3d3ea8e6
SP		 1485 goto cifs_parse_mount_err;
1486 }
1487 vol->backupgid_specified = true;
8830d7e0
SP		 1488 break;
1489 case Opt_uid:
3da46565 1490 if (get_option_uid(args, &vol->linux_uid)) {
f96637be
JP		 1491 cifs_dbg(VFS, "%s: Invalid uid value\n",
1492 __func__);
8830d7e0
SP		 1493 goto cifs_parse_mount_err;
1494 }
8830d7e0
SP		 1495 uid_specified = true;
1496 break;
1497 case Opt_cruid:
3da46565 1498 if (get_option_uid(args, &vol->cred_uid)) {
f96637be
JP		 1499 cifs_dbg(VFS, "%s: Invalid cruid value\n",
1500 __func__);
8830d7e0
SP		 1501 goto cifs_parse_mount_err;
1502 }
8830d7e0
SP		 1503 break;
1504 case Opt_gid:
3da46565 1505 if (get_option_gid(args, &vol->linux_gid)) {
f96637be
JP		 1506 cifs_dbg(VFS, "%s: Invalid gid value\n",
1507 __func__);
8830d7e0
SP		 1508 goto cifs_parse_mount_err;
1509 }
8830d7e0
SP		 1510 gid_specified = true;
1511 break;
1512 case Opt_file_mode:
1513 if (get_option_ul(args, &option)) {
f96637be
JP		 1514 cifs_dbg(VFS, "%s: Invalid file_mode value\n",
1515 __func__);
8830d7e0
SP		 1516 goto cifs_parse_mount_err;
1517 }
1518 vol->file_mode = option;
1519 break;
1520 case Opt_dirmode:
1521 if (get_option_ul(args, &option)) {
f96637be
JP		 1522 cifs_dbg(VFS, "%s: Invalid dir_mode value\n",
1523 __func__);
8830d7e0
SP		 1524 goto cifs_parse_mount_err;
1525 }
1526 vol->dir_mode = option;
1527 break;
1528 case Opt_port:
b979aaa1
JL		 1529 if (get_option_ul(args, &option) ||
1530 option > USHRT_MAX) {
f96637be
JP		 1531 cifs_dbg(VFS, "%s: Invalid port value\n",
1532 __func__);
8830d7e0
SP		 1533 goto cifs_parse_mount_err;
1534 }
b979aaa1 1535 port = (unsigned short)option;
8830d7e0
SP		 1536 break;
1537 case Opt_rsize:
1538 if (get_option_ul(args, &option)) {
f96637be
JP		 1539 cifs_dbg(VFS, "%s: Invalid rsize value\n",
1540 __func__);
b946845a 1541 goto cifs_parse_mount_err;
8830d7e0
SP		 1542 }
1543 vol->rsize = option;
1544 break;
1545 case Opt_wsize:
1546 if (get_option_ul(args, &option)) {
f96637be
JP		 1547 cifs_dbg(VFS, "%s: Invalid wsize value\n",
1548 __func__);
8830d7e0
SP		 1549 goto cifs_parse_mount_err;
1550 }
1551 vol->wsize = option;
1552 break;
1553 case Opt_actimeo:
1554 if (get_option_ul(args, &option)) {
f96637be
JP		 1555 cifs_dbg(VFS, "%s: Invalid actimeo value\n",
1556 __func__);
8830d7e0
SP		 1557 goto cifs_parse_mount_err;
1558 }
1559 vol->actimeo = HZ * option;
1560 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
f96637be 1561 cifs_dbg(VFS, "attribute cache timeout too large\n");
8830d7e0
SP		 1562 goto cifs_parse_mount_err;
1563 }
1564 break;
1565
1566 /* String Arguments */
1567
4fe9e963
SP		 1568 case Opt_blank_user:
1569 /* null user, ie. anonymous authentication */
1570 vol->nullauth = 1;
1571 vol->username = NULL;
1572 break;
8830d7e0
SP		 1573 case Opt_user:
1574 string = match_strdup(args);
1575 if (string == NULL)
1576 goto out_nomem;
1577
4fe9e963 1578 if (strnlen(string, MAX_USERNAME_SIZE) >
8830d7e0
SP		 1579 MAX_USERNAME_SIZE) {
1580 printk(KERN_WARNING "CIFS: username too long\n");
1581 goto cifs_parse_mount_err;
1582 }
1583 vol->username = kstrdup(string, GFP_KERNEL);
f96637be 1584 if (!vol->username)
8830d7e0 1585 goto cifs_parse_mount_err;
8830d7e0
SP		 1586 break;
1587 case Opt_blank_pass:
8830d7e0
SP		 1588 /* passwords have to be handled differently
1589 * to allow the character used for deliminator
1590 * to be passed within them
1591 */
1592
c369c9a4
SP		 1593 /*
1594 * Check if this is a case where the password
1595 * starts with a delimiter
1596 */
1597 tmp_end = strchr(data, '=');
1598 tmp_end++;
1599 if (!(tmp_end < end && tmp_end[1] == delim)) {
1600 /* No it is not. Set the password to NULL */
1601 vol->password = NULL;
1602 break;
1603 }
1604 /* Yes it is. Drop down to Opt_pass below.*/
1605 case Opt_pass:
8830d7e0
SP		 1606 /* Obtain the value string */
1607 value = strchr(data, '=');
10238074 1608 value++;
8830d7e0
SP		 1609
1610 /* Set tmp_end to end of the string */
1611 tmp_end = (char *) value + strlen(value);
1612
1613 /* Check if following character is the deliminator
1614 * If yes, we have encountered a double deliminator
1615 * reset the NULL character to the deliminator
1616 */
e73f843a 1617 if (tmp_end < end && tmp_end[1] == delim) {
8830d7e0
SP		 1618 tmp_end[0] = delim;
1619
e73f843a
SJ		 1620 /* Keep iterating until we get to a single
1621 * deliminator OR the end
1622 */
1623 while ((tmp_end = strchr(tmp_end, delim))
1624 != NULL && (tmp_end[1] == delim)) {
1625 tmp_end = (char *) &tmp_end[2];
1626 }
1627
1628 /* Reset var options to point to next element */
1629 if (tmp_end) {
1630 tmp_end[0] = '\0';
1631 options = (char *) &tmp_end[1];
1632 } else
1633 /* Reached the end of the mount option
1634 * string */
1635 options = end;
8830d7e0
SP		 1636 }
1637
8830d7e0
SP		 1638 /* Now build new password string */
1639 temp_len = strlen(value);
1640 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1641 if (vol->password == NULL) {
1642 printk(KERN_WARNING "CIFS: no memory "
1643 "for password\n");
1644 goto cifs_parse_mount_err;
1645 }
1646
1647 for (i = 0, j = 0; i < temp_len; i++, j++) {
1648 vol->password[j] = value[i];
1649 if ((value[i] == delim) &&
1650 value[i+1] == delim)
1651 /* skip the second deliminator */
1652 i++;
1653 }
1654 vol->password[j] = '\0';
1655 break;
4fe9e963 1656 case Opt_blank_ip:
b979aaa1
JL		 1657 /* FIXME: should this be an error instead? */
1658 got_ip = false;
4fe9e963 1659 break;
8830d7e0
SP		 1660 case Opt_ip:
1661 string = match_strdup(args);
1662 if (string == NULL)
1663 goto out_nomem;
1664
b979aaa1
JL		 1665 if (!cifs_convert_address(dstaddr, string,
1666 strlen(string))) {
1667 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1668 string);
8830d7e0
SP		 1669 goto cifs_parse_mount_err;
1670 }
b979aaa1 1671 got_ip = true;
8830d7e0 1672 break;
8830d7e0
SP		 1673 case Opt_domain:
1674 string = match_strdup(args);
1675 if (string == NULL)
1676 goto out_nomem;
1677
4fe9e963 1678 if (strnlen(string, 256) == 256) {
8830d7e0
SP		 1679 printk(KERN_WARNING "CIFS: domain name too"
1680 " long\n");
1681 goto cifs_parse_mount_err;
1682 }
1683
1684 vol->domainname = kstrdup(string, GFP_KERNEL);
1685 if (!vol->domainname) {
1686 printk(KERN_WARNING "CIFS: no memory "
1687 "for domainname\n");
1688 goto cifs_parse_mount_err;
1689 }
f96637be 1690 cifs_dbg(FYI, "Domain name set\n");
8830d7e0
SP		 1691 break;
1692 case Opt_srcaddr:
1693 string = match_strdup(args);
1694 if (string == NULL)
1695 goto out_nomem;
1696
4fe9e963 1697 if (!cifs_convert_address(
8830d7e0
SP		 1698 (struct sockaddr *)&vol->srcaddr,
1699 string, strlen(string))) {
1700 printk(KERN_WARNING "CIFS: Could not parse"
1701 " srcaddr: %s\n", string);
1702 goto cifs_parse_mount_err;
1703 }
1704 break;
8830d7e0
SP		 1705 case Opt_iocharset:
1706 string = match_strdup(args);
1707 if (string == NULL)
1708 goto out_nomem;
1709
4fe9e963 1710 if (strnlen(string, 1024) >= 65) {
8830d7e0
SP		 1711 printk(KERN_WARNING "CIFS: iocharset name "
1712 "too long.\n");
1713 goto cifs_parse_mount_err;
1714 }
1715
1716 if (strnicmp(string, "default", 7) != 0) {
1717 vol->iocharset = kstrdup(string,
1718 GFP_KERNEL);
1719 if (!vol->iocharset) {
1720 printk(KERN_WARNING "CIFS: no memory"
1721 "for charset\n");
1722 goto cifs_parse_mount_err;
1723 }
1724 }
1725 /* if iocharset not set then load_nls_default
1726 * is used by caller
1727 */
f96637be 1728 cifs_dbg(FYI, "iocharset set to %s\n", string);
8830d7e0 1729 break;
8830d7e0
SP		 1730 case Opt_netbiosname:
1731 string = match_strdup(args);
1732 if (string == NULL)
1733 goto out_nomem;
1734
8830d7e0
SP		 1735 memset(vol->source_rfc1001_name, 0x20,
1736 RFC1001_NAME_LEN);
1737 /*
1738 * FIXME: are there cases in which a comma can
1739 * be valid in workstation netbios name (and
1740 * need special handling)?
1741 */
1742 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1743 /* don't ucase netbiosname for user */
1744 if (string[i] == 0)
1745 break;
1746 vol->source_rfc1001_name[i] = string[i];
1747 }
1748 /* The string has 16th byte zero still from
1749 * set at top of the function
1750 */
1751 if (i == RFC1001_NAME_LEN && string[i] != 0)
1752 printk(KERN_WARNING "CIFS: netbiosname"
1753 " longer than 15 truncated.\n");
1754
1755 break;
1756 case Opt_servern:
1757 /* servernetbiosname specified override *SMBSERVER */
1758 string = match_strdup(args);
1759 if (string == NULL)
1760 goto out_nomem;
1761
8830d7e0
SP		 1762 /* last byte, type, is 0x20 for servr type */
1763 memset(vol->target_rfc1001_name, 0x20,
1764 RFC1001_NAME_LEN_WITH_NULL);
1765
1766 /* BB are there cases in which a comma can be
1767 valid in this workstation netbios name
1768 (and need special handling)? */
1769
1770 /* user or mount helper must uppercase the
1771 netbios name */
1772 for (i = 0; i < 15; i++) {
1773 if (string[i] == 0)
1774 break;
1775 vol->target_rfc1001_name[i] = string[i];
1776 }
1777 /* The string has 16th byte zero still from
1778 set at top of the function */
1779 if (i == RFC1001_NAME_LEN && string[i] != 0)
1780 printk(KERN_WARNING "CIFS: server net"
1781 "biosname longer than 15 truncated.\n");
1782 break;
1783 case Opt_ver:
1784 string = match_strdup(args);
1785 if (string == NULL)
1786 goto out_nomem;
1787
5249af32 1788 if (strnicmp(string, "1", 1) == 0) {
8830d7e0
SP		 1789 /* This is the default */
1790 break;
1791 }
1792 /* For all other value, error */
1793 printk(KERN_WARNING "CIFS: Invalid version"
1794 " specified\n");
b946845a 1795 goto cifs_parse_mount_err;
23db65f5
JL		 1796 case Opt_vers:
1797 string = match_strdup(args);
1798 if (string == NULL)
1799 goto out_nomem;
1800
1801 if (cifs_parse_smb_version(string, vol) != 0)
1802 goto cifs_parse_mount_err;
1803 break;
8830d7e0
SP		 1804 case Opt_sec:
1805 string = match_strdup(args);
1806 if (string == NULL)
1807 goto out_nomem;
1808
8830d7e0
SP		 1809 if (cifs_parse_security_flavors(string, vol) != 0)
1810 goto cifs_parse_mount_err;
1811 break;
15b6a473
JL		 1812 case Opt_cache:
1813 string = match_strdup(args);
1814 if (string == NULL)
1815 goto out_nomem;
1816
1817 if (cifs_parse_cache_flavor(string, vol) != 0)
1818 goto cifs_parse_mount_err;
1819 break;
8830d7e0 1820 default:
d8162558
JL		 1821 /*
1822 * An option we don't recognize. Save it off for later
1823 * if we haven't already found one
1824 */
1825 if (!invalid)
1826 invalid = data;
8830d7e0 1827 break;
1da177e4 1828 }
8830d7e0
SP		 1829 /* Free up any allocated string */
1830 kfree(string);
1831 string = NULL;
1da177e4 1832 }
0eb8a132 1833
d8162558
JL		 1834 if (!sloppy && invalid) {
1835 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1836 goto cifs_parse_mount_err;
1837 }
1838
8a8798a5
JL		 1839#ifndef CONFIG_KEYS
1840 /* Muliuser mounts require CONFIG_KEYS support */
1841 if (vol->multiuser) {
f96637be 1842 cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
b946845a 1843 goto cifs_parse_mount_err;
0eb8a132 1844 }
8a8798a5 1845#endif
e5e69abd 1846 if (!vol->UNC) {
37d4f99b 1847 cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n");
e5e69abd
JL		 1848 goto cifs_parse_mount_err;
1849 }
0eb8a132 1850
62a1a439
JL		 1851 /* make sure UNC has a share name */
1852 if (!strchr(vol->UNC + 3, '\\')) {
f96637be 1853 cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n");
62a1a439
JL		 1854 goto cifs_parse_mount_err;
1855 }
1856
b979aaa1
JL		 1857 if (!got_ip) {
1858 /* No ip= option specified? Try to get it from UNC */
1859 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1860 strlen(&vol->UNC[2]))) {
1861 printk(KERN_ERR "Unable to determine destination "
1862 "address.\n");
1863 goto cifs_parse_mount_err;
1864 }
1865 }
1866
1867 /* set the port that we got earlier */
1868 cifs_set_port(dstaddr, port);
1da177e4 1869
9b9d6b24
JL		 1870 if (uid_specified)
1871 vol->override_uid = override_uid;
1872 else if (override_uid == 1)
1873 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1874 "specified with no uid= option.\n");
1875
1876 if (gid_specified)
1877 vol->override_gid = override_gid;
1878 else if (override_gid == 1)
1879 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1880 "specified with no gid= option.\n");
1881
b946845a 1882 kfree(mountdata_copy);
1da177e4 1883 return 0;
b946845a 1884
8830d7e0
SP		 1885out_nomem:
1886 printk(KERN_WARNING "Could not allocate temporary buffer\n");
b946845a 1887cifs_parse_mount_err:
8830d7e0 1888 kfree(string);
b946845a
SF		 1889 kfree(mountdata_copy);
1890 return 1;
1da177e4
LT		 1891}
1892
3eb9a889
BG		 1893/** Returns true if srcaddr isn't specified and rhs isn't
1894 * specified, or if srcaddr is specified and
1895 * matches the IP address of the rhs argument.
1896 */
1897static bool
1898srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1899{
1900 switch (srcaddr->sa_family) {
1901 case AF_UNSPEC:
1902 return (rhs->sa_family == AF_UNSPEC);
1903 case AF_INET: {
1904 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1905 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1906 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1907 }
1908 case AF_INET6: {
1909 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
e3e2775c 1910 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
3eb9a889
BG		 1911 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1912 }
1913 default:
1914 WARN_ON(1);
1915 return false; /* don't expect to be here */
1916 }
1917}
1918
4b886136
PS		 1919/*
1920 * If no port is specified in addr structure, we try to match with 445 port
1921 * and if it fails - with 139 ports. It should be called only if address
1922 * families of server and addr are equal.
1923 */
1924static bool
1925match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1926{
6da97910 1927 __be16 port, *sport;
4b886136
PS		 1928
1929 switch (addr->sa_family) {
1930 case AF_INET:
1931 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1932 port = ((struct sockaddr_in *) addr)->sin_port;
1933 break;
1934 case AF_INET6:
1935 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1936 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1937 break;
1938 default:
1939 WARN_ON(1);
1940 return false;
1941 }
1942
1943 if (!port) {
1944 port = htons(CIFS_PORT);
1945 if (port == *sport)
1946 return true;
1947
1948 port = htons(RFC1001_PORT);
1949 }
1950
1951 return port == *sport;
1952}
3eb9a889 1953
4515148e 1954static bool
3eb9a889
BG		 1955match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1956 struct sockaddr *srcaddr)
4515148e 1957{
4515148e 1958 switch (addr->sa_family) {
a9f1b85e
PS		 1959 case AF_INET: {
1960 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1961 struct sockaddr_in *srv_addr4 =
1962 (struct sockaddr_in *)&server->dstaddr;
1963
1964 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
4515148e 1965 return false;
4515148e 1966 break;
a9f1b85e
PS		 1967 }
1968 case AF_INET6: {
1969 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1970 struct sockaddr_in6 *srv_addr6 =
1971 (struct sockaddr_in6 *)&server->dstaddr;
1972
4515148e 1973 if (!ipv6_addr_equal(&addr6->sin6_addr,
a9f1b85e 1974 &srv_addr6->sin6_addr))
4515148e 1975 return false;
a9f1b85e 1976 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
4515148e 1977 return false;
4515148e
JL		 1978 break;
1979 }
a9f1b85e
PS		 1980 default:
1981 WARN_ON(1);
1982 return false; /* don't expect to be here */
1983 }
4515148e 1984
3eb9a889
BG		 1985 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1986 return false;
1987
4515148e
JL		 1988 return true;
1989}
1990
daf5b0b6
JL		 1991static bool
1992match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1993{
3f618223
JL		 1994 /*
1995 * The select_sectype function should either return the vol->sectype
1996 * that was specified, or "Unspecified" if that sectype was not
1997 * compatible with the given NEGOTIATE request.
1998 */
1999 if (select_sectype(server, vol->sectype) == Unspecified)
daf5b0b6 2000 return false;
daf5b0b6 2001
3f618223
JL		 2002 /*
2003 * Now check if signing mode is acceptable. No need to check
2004 * global_secflags at this point since if MUST_SIGN is set then
2005 * the server->sign had better be too.
2006 */
38d77c50
JL		 2007 if (vol->sign && !server->sign)
2008 return false;
daf5b0b6
JL		 2009
2010 return true;
2011}
2012
9fa114f7 2013static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
37bb04e5 2014{
9fa114f7
JL		 2015 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2016
a0b3df5c
JL		 2017 if (vol->nosharesock)
2018 return 0;
2019
23db65f5
JL		 2020 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2021 return 0;
2022
37bb04e5
PS		 2023 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2024 return 0;
2025
2026 if (!match_address(server, addr,
2027 (struct sockaddr *)&vol->srcaddr))
2028 return 0;
2029
2030 if (!match_port(server, addr))
2031 return 0;
2032
2033 if (!match_security(server, vol))
2034 return 0;
2035
2036 return 1;
2037}
2038
e7ddee90 2039static struct TCP_Server_Info *
9fa114f7 2040cifs_find_tcp_session(struct smb_vol *vol)
1da177e4 2041{
e7ddee90 2042 struct TCP_Server_Info *server;
e7ddee90 2043
3f9bcca7 2044 spin_lock(&cifs_tcp_ses_lock);
4515148e 2045 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
9fa114f7 2046 if (!match_server(server, vol))
daf5b0b6
JL		 2047 continue;
2048
e7ddee90 2049 ++server->srv_count;
3f9bcca7 2050 spin_unlock(&cifs_tcp_ses_lock);
f96637be 2051 cifs_dbg(FYI, "Existing tcp session with server found\n");
e7ddee90 2052 return server;
1da177e4 2053 }
3f9bcca7 2054 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2055 return NULL;
2056}
1b20d672 2057
14fbf50d 2058static void
e7ddee90 2059cifs_put_tcp_session(struct TCP_Server_Info *server)
1da177e4 2060{
e7ddee90 2061 struct task_struct *task;
1b20d672 2062
3f9bcca7 2063 spin_lock(&cifs_tcp_ses_lock);
e7ddee90 2064 if (--server->srv_count > 0) {
3f9bcca7 2065 spin_unlock(&cifs_tcp_ses_lock);
e7ddee90 2066 return;
1da177e4 2067 }
1b20d672 2068
f1d0c998
RL		 2069 put_net(cifs_net_ns(server));
2070
e7ddee90 2071 list_del_init(&server->tcp_ses_list);
3f9bcca7 2072 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2073
c74093b6
JL		 2074 cancel_delayed_work_sync(&server->echo);
2075
e7ddee90
JL		 2076 spin_lock(&GlobalMid_Lock);
2077 server->tcpStatus = CifsExiting;
2078 spin_unlock(&GlobalMid_Lock);
dea570e0 2079
d2b91521 2080 cifs_crypto_shash_release(server);
488f1d2d
SJ		 2081 cifs_fscache_release_client_cookie(server);
2082
21e73393
SP		 2083 kfree(server->session_key.response);
2084 server->session_key.response = NULL;
2085 server->session_key.len = 0;
2086
e7ddee90
JL		 2087 task = xchg(&server->tsk, NULL);
2088 if (task)
2089 force_sig(SIGKILL, task);
1da177e4
LT		 2090}
2091
63c038c2
JL		 2092static struct TCP_Server_Info *
2093cifs_get_tcp_session(struct smb_vol *volume_info)
2094{
2095 struct TCP_Server_Info *tcp_ses = NULL;
63c038c2
JL		 2096 int rc;
2097
f96637be 2098 cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC);
63c038c2
JL		 2099
2100 /* see if we already have a matching tcp_ses */
9fa114f7 2101 tcp_ses = cifs_find_tcp_session(volume_info);
63c038c2
JL		 2102 if (tcp_ses)
2103 return tcp_ses;
2104
2105 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2106 if (!tcp_ses) {
2107 rc = -ENOMEM;
2108 goto out_err;
2109 }
2110
d2b91521
SP		 2111 rc = cifs_crypto_shash_allocate(tcp_ses);
2112 if (rc) {
f96637be 2113 cifs_dbg(VFS, "could not setup hash structures rc %d\n", rc);
d2b91521
SP		 2114 goto out_err;
2115 }
2116
23db65f5
JL		 2117 tcp_ses->ops = volume_info->ops;
2118 tcp_ses->vals = volume_info->vals;
f1d0c998 2119 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
63c038c2
JL		 2120 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2121 if (IS_ERR(tcp_ses->hostname)) {
2122 rc = PTR_ERR(tcp_ses->hostname);
f7c5445a 2123 goto out_err_crypto_release;
63c038c2
JL		 2124 }
2125
2126 tcp_ses->noblocksnd = volume_info->noblocksnd;
2127 tcp_ses->noautotune = volume_info->noautotune;
6a5fa236 2128 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
fc40f9cf 2129 tcp_ses->in_flight = 0;
2d86dbc9 2130 tcp_ses->credits = 1;
63c038c2
JL		 2131 init_waitqueue_head(&tcp_ses->response_q);
2132 init_waitqueue_head(&tcp_ses->request_q);
2133 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2134 mutex_init(&tcp_ses->srv_mutex);
2135 memcpy(tcp_ses->workstation_RFC1001_name,
2136 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2137 memcpy(tcp_ses->server_RFC1001_name,
2138 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
5d0d2882 2139 tcp_ses->session_estab = false;
63c038c2 2140 tcp_ses->sequence_number = 0;
fda35943 2141 tcp_ses->lstrp = jiffies;
58fa015f 2142 spin_lock_init(&tcp_ses->req_lock);
63c038c2
JL		 2143 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2144 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
c74093b6 2145 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
9fa114f7
JL		 2146 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2147 sizeof(tcp_ses->srcaddr));
2148 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2149 sizeof(tcp_ses->dstaddr));
63c038c2
JL		 2150 /*
2151 * at this point we are the only ones with the pointer
2152 * to the struct since the kernel thread not created yet
2153 * no need to spinlock this init of tcpStatus or srv_count
2154 */
2155 tcp_ses->tcpStatus = CifsNew;
2156 ++tcp_ses->srv_count;
2157
a9f1b85e 2158 rc = ip_connect(tcp_ses);
63c038c2 2159 if (rc < 0) {
f96637be 2160 cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
f7c5445a 2161 goto out_err_crypto_release;
63c038c2
JL		 2162 }
2163
2164 /*
2165 * since we're in a cifs function already, we know that
2166 * this will succeed. No need for try_module_get().
2167 */
2168 __module_get(THIS_MODULE);
7c97c200 2169 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
63c038c2
JL		 2170 tcp_ses, "cifsd");
2171 if (IS_ERR(tcp_ses->tsk)) {
2172 rc = PTR_ERR(tcp_ses->tsk);
f96637be 2173 cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
63c038c2 2174 module_put(THIS_MODULE);
f7c5445a 2175 goto out_err_crypto_release;
63c038c2 2176 }
fd88ce93 2177 tcp_ses->tcpStatus = CifsNeedNegotiate;
63c038c2
JL		 2178
2179 /* thread spawned, put it on the list */
3f9bcca7 2180 spin_lock(&cifs_tcp_ses_lock);
63c038c2 2181 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
3f9bcca7 2182 spin_unlock(&cifs_tcp_ses_lock);
63c038c2 2183
488f1d2d
SJ		 2184 cifs_fscache_get_client_cookie(tcp_ses);
2185
c74093b6 2186 /* queue echo request delayed work */
da472fc8 2187 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
c74093b6 2188
63c038c2
JL		 2189 return tcp_ses;
2190
f7c5445a 2191out_err_crypto_release:
d2b91521
SP		 2192 cifs_crypto_shash_release(tcp_ses);
2193
f1d0c998
RL		 2194 put_net(cifs_net_ns(tcp_ses));
2195
63c038c2
JL		 2196out_err:
2197 if (tcp_ses) {
8347a5cd
SF		 2198 if (!IS_ERR(tcp_ses->hostname))
2199 kfree(tcp_ses->hostname);
63c038c2
JL		 2200 if (tcp_ses->ssocket)
2201 sock_release(tcp_ses->ssocket);
2202 kfree(tcp_ses);
2203 }
2204 return ERR_PTR(rc);
2205}
2206
96daf2b0 2207static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
37bb04e5 2208{
3f618223
JL		 2209 if (vol->sectype != Unspecified &&
2210 vol->sectype != ses->sectype)
2211 return 0;
2212
2213 switch (ses->sectype) {
37bb04e5 2214 case Kerberos:
64ed39dd 2215 if (!uid_eq(vol->cred_uid, ses->cred_uid))
37bb04e5
PS		 2216 return 0;
2217 break;
2218 default:
04febabc
JL		 2219 /* NULL username means anonymous session */
2220 if (ses->user_name == NULL) {
2221 if (!vol->nullauth)
2222 return 0;
2223 break;
2224 }
2225
37bb04e5 2226 /* anything else takes username/password */
04febabc
JL		 2227 if (strncmp(ses->user_name,
2228 vol->username ? vol->username : "",
37bb04e5
PS		 2229 MAX_USERNAME_SIZE))
2230 return 0;
2231 if (strlen(vol->username) != 0 &&
2232 ses->password != NULL &&
2233 strncmp(ses->password,
2234 vol->password ? vol->password : "",
2235 MAX_PASSWORD_SIZE))
2236 return 0;
2237 }
2238 return 1;
2239}
2240
96daf2b0 2241static struct cifs_ses *
4ff67b72 2242cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1da177e4 2243{
96daf2b0 2244 struct cifs_ses *ses;
dea570e0 2245
3f9bcca7 2246 spin_lock(&cifs_tcp_ses_lock);
4ff67b72 2247 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
37bb04e5
PS		 2248 if (!match_session(ses, vol))
2249 continue;
14fbf50d 2250 ++ses->ses_count;
3f9bcca7 2251 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2252 return ses;
2253 }
3f9bcca7 2254 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2255 return NULL;
2256}
dea570e0 2257
14fbf50d 2258static void
96daf2b0 2259cifs_put_smb_ses(struct cifs_ses *ses)
14fbf50d 2260{
58c45c58 2261 unsigned int xid;
14fbf50d 2262 struct TCP_Server_Info *server = ses->server;
dea570e0 2263
f96637be 2264 cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
3f9bcca7 2265 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 2266 if (--ses->ses_count > 0) {
3f9bcca7 2267 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2268 return;
2269 }
dea570e0 2270
14fbf50d 2271 list_del_init(&ses->smb_ses_list);
3f9bcca7 2272 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2273
58c45c58 2274 if (ses->status == CifsGood && server->ops->logoff) {
6d5786a3 2275 xid = get_xid();
58c45c58 2276 server->ops->logoff(xid, ses);
6d5786a3 2277 _free_xid(xid);
14fbf50d
JL		 2278 }
2279 sesInfoFree(ses);
2280 cifs_put_tcp_session(server);
2281}
dea570e0 2282
8a8798a5
JL		 2283#ifdef CONFIG_KEYS
2284
2285/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
2286#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
2287
2288/* Populate username and pw fields from keyring if possible */
2289static int
2290cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2291{
2292 int rc = 0;
2293 char *desc, *delim, *payload;
2294 ssize_t len;
2295 struct key *key;
2296 struct TCP_Server_Info *server = ses->server;
2297 struct sockaddr_in *sa;
2298 struct sockaddr_in6 *sa6;
2299 struct user_key_payload *upayload;
2300
2301 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2302 if (!desc)
2303 return -ENOMEM;
2304
2305 /* try to find an address key first */
2306 switch (server->dstaddr.ss_family) {
2307 case AF_INET:
2308 sa = (struct sockaddr_in *)&server->dstaddr;
2309 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2310 break;
2311 case AF_INET6:
2312 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2313 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2314 break;
2315 default:
f96637be
JP		 2316 cifs_dbg(FYI, "Bad ss_family (%hu)\n",
2317 server->dstaddr.ss_family);
8a8798a5
JL		 2318 rc = -EINVAL;
2319 goto out_err;
2320 }
2321
f96637be 2322 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
8a8798a5
JL		 2323 key = request_key(&key_type_logon, desc, "");
2324 if (IS_ERR(key)) {
2325 if (!ses->domainName) {
f96637be 2326 cifs_dbg(FYI, "domainName is NULL\n");
8a8798a5
JL		 2327 rc = PTR_ERR(key);
2328 goto out_err;
2329 }
2330
2331 /* didn't work, try to find a domain key */
2332 sprintf(desc, "cifs:d:%s", ses->domainName);
f96637be 2333 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
8a8798a5
JL		 2334 key = request_key(&key_type_logon, desc, "");
2335 if (IS_ERR(key)) {
2336 rc = PTR_ERR(key);
2337 goto out_err;
2338 }
2339 }
2340
2341 down_read(&key->sem);
2342 upayload = key->payload.data;
2343 if (IS_ERR_OR_NULL(upayload)) {
4edc53c1 2344 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
8a8798a5
JL		 2345 goto out_key_put;
2346 }
2347
2348 /* find first : in payload */
2349 payload = (char *)upayload->data;
2350 delim = strnchr(payload, upayload->datalen, ':');
f96637be 2351 cifs_dbg(FYI, "payload=%s\n", payload);
8a8798a5 2352 if (!delim) {
f96637be
JP		 2353 cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
2354 upayload->datalen);
8a8798a5
JL		 2355 rc = -EINVAL;
2356 goto out_key_put;
2357 }
2358
2359 len = delim - payload;
2360 if (len > MAX_USERNAME_SIZE || len <= 0) {
f96637be
JP		 2361 cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
2362 len);
8a8798a5
JL		 2363 rc = -EINVAL;
2364 goto out_key_put;
2365 }
2366
2367 vol->username = kstrndup(payload, len, GFP_KERNEL);
2368 if (!vol->username) {
f96637be
JP		 2369 cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
2370 len);
8a8798a5
JL		 2371 rc = -ENOMEM;
2372 goto out_key_put;
2373 }
f96637be 2374 cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
8a8798a5
JL		 2375
2376 len = key->datalen - (len + 1);
2377 if (len > MAX_PASSWORD_SIZE || len <= 0) {
f96637be 2378 cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
8a8798a5
JL		 2379 rc = -EINVAL;
2380 kfree(vol->username);
2381 vol->username = NULL;
2382 goto out_key_put;
2383 }
2384
2385 ++delim;
2386 vol->password = kstrndup(delim, len, GFP_KERNEL);
2387 if (!vol->password) {
f96637be
JP		 2388 cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
2389 len);
8a8798a5
JL		 2390 rc = -ENOMEM;
2391 kfree(vol->username);
2392 vol->username = NULL;
2393 goto out_key_put;
2394 }
2395
2396out_key_put:
2397 up_read(&key->sem);
2398 key_put(key);
2399out_err:
2400 kfree(desc);
f96637be 2401 cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
8a8798a5
JL		 2402 return rc;
2403}
2404#else /* ! CONFIG_KEYS */
2405static inline int
2406cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2407 struct cifs_ses *ses __attribute__((unused)))
2408{
2409 return -ENOSYS;
2410}
2411#endif /* CONFIG_KEYS */
2412
96daf2b0 2413static struct cifs_ses *
36988c76
JL		 2414cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2415{
286170aa
PS		 2416 int rc = -ENOMEM;
2417 unsigned int xid;
96daf2b0 2418 struct cifs_ses *ses;
a9f1b85e
PS		 2419 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2420 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
36988c76 2421
6d5786a3 2422 xid = get_xid();
36988c76 2423
4ff67b72 2424 ses = cifs_find_smb_ses(server, volume_info);
36988c76 2425 if (ses) {
f96637be
JP		 2426 cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
2427 ses->status);
36988c76 2428
36988c76 2429 mutex_lock(&ses->session_mutex);
198b5682
JL		 2430 rc = cifs_negotiate_protocol(xid, ses);
2431 if (rc) {
2432 mutex_unlock(&ses->session_mutex);
2433 /* problem -- put our ses reference */
2434 cifs_put_smb_ses(ses);
6d5786a3 2435 free_xid(xid);
198b5682
JL		 2436 return ERR_PTR(rc);
2437 }
36988c76 2438 if (ses->need_reconnect) {
f96637be 2439 cifs_dbg(FYI, "Session needs reconnect\n");
36988c76
JL		 2440 rc = cifs_setup_session(xid, ses,
2441 volume_info->local_nls);
2442 if (rc) {
2443 mutex_unlock(&ses->session_mutex);
2444 /* problem -- put our reference */
2445 cifs_put_smb_ses(ses);
6d5786a3 2446 free_xid(xid);
36988c76
JL		 2447 return ERR_PTR(rc);
2448 }
2449 }
2450 mutex_unlock(&ses->session_mutex);
460cf341
JL		 2451
2452 /* existing SMB ses has a server reference already */
2453 cifs_put_tcp_session(server);
6d5786a3 2454 free_xid(xid);
36988c76
JL		 2455 return ses;
2456 }
2457
f96637be 2458 cifs_dbg(FYI, "Existing smb sess not found\n");
36988c76
JL		 2459 ses = sesInfoAlloc();
2460 if (ses == NULL)
2461 goto get_ses_fail;
2462
2463 /* new SMB session uses our server ref */
2464 ses->server = server;
a9f1b85e
PS		 2465 if (server->dstaddr.ss_family == AF_INET6)
2466 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
36988c76 2467 else
a9f1b85e 2468 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
36988c76 2469
8727c8a8
SF		 2470 if (volume_info->username) {
2471 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2472 if (!ses->user_name)
2473 goto get_ses_fail;
2474 }
36988c76
JL		 2475
2476 /* volume_info->password freed at unmount */
2477 if (volume_info->password) {
2478 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2479 if (!ses->password)
2480 goto get_ses_fail;
2481 }
2482 if (volume_info->domainname) {
d3686d54
SP		 2483 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2484 if (!ses->domainName)
2485 goto get_ses_fail;
36988c76 2486 }
3e4b3e1f 2487 ses->cred_uid = volume_info->cred_uid;
36988c76 2488 ses->linux_uid = volume_info->linux_uid;
d9b94201 2489
28e11bd8
JL		 2490 ses->sectype = volume_info->sectype;
2491 ses->sign = volume_info->sign;
36988c76
JL		 2492
2493 mutex_lock(&ses->session_mutex);
198b5682
JL		 2494 rc = cifs_negotiate_protocol(xid, ses);
2495 if (!rc)
2496 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
36988c76 2497 mutex_unlock(&ses->session_mutex);
c8e56f1f 2498 if (rc)
36988c76
JL		 2499 goto get_ses_fail;
2500
2501 /* success, put it on the list */
3f9bcca7 2502 spin_lock(&cifs_tcp_ses_lock);
36988c76 2503 list_add(&ses->smb_ses_list, &server->smb_ses_list);
3f9bcca7 2504 spin_unlock(&cifs_tcp_ses_lock);
36988c76 2505
6d5786a3 2506 free_xid(xid);
36988c76
JL		 2507 return ses;
2508
2509get_ses_fail:
2510 sesInfoFree(ses);
6d5786a3 2511 free_xid(xid);
36988c76
JL		 2512 return ERR_PTR(rc);
2513}
2514
96daf2b0 2515static int match_tcon(struct cifs_tcon *tcon, const char *unc)
37bb04e5
PS		 2516{
2517 if (tcon->tidStatus == CifsExiting)
2518 return 0;
2519 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2520 return 0;
2521 return 1;
2522}
2523
96daf2b0
SF		 2524static struct cifs_tcon *
2525cifs_find_tcon(struct cifs_ses *ses, const char *unc)
f1987b44
JL		 2526{
2527 struct list_head *tmp;
96daf2b0 2528 struct cifs_tcon *tcon;
f1987b44 2529
3f9bcca7 2530 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2531 list_for_each(tmp, &ses->tcon_list) {
96daf2b0 2532 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
37bb04e5 2533 if (!match_tcon(tcon, unc))
f1987b44 2534 continue;
f1987b44 2535 ++tcon->tc_count;
3f9bcca7 2536 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2537 return tcon;
1da177e4 2538 }
3f9bcca7 2539 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2540 return NULL;
2541}
2542
f1987b44 2543static void
96daf2b0 2544cifs_put_tcon(struct cifs_tcon *tcon)
f1987b44 2545{
2e6e02ab 2546 unsigned int xid;
96daf2b0 2547 struct cifs_ses *ses = tcon->ses;
f1987b44 2548
f96637be 2549 cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
3f9bcca7 2550 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2551 if (--tcon->tc_count > 0) {
3f9bcca7 2552 spin_unlock(&cifs_tcp_ses_lock);
f1987b44
JL		 2553 return;
2554 }
2555
2556 list_del_init(&tcon->tcon_list);
3f9bcca7 2557 spin_unlock(&cifs_tcp_ses_lock);
f1987b44 2558
6d5786a3 2559 xid = get_xid();
2e6e02ab
PS		 2560 if (ses->server->ops->tree_disconnect)
2561 ses->server->ops->tree_disconnect(xid, tcon);
6d5786a3 2562 _free_xid(xid);
f1987b44 2563
d03382ce 2564 cifs_fscache_release_super_cookie(tcon);
9f841593 2565 tconInfoFree(tcon);
f1987b44
JL		 2566 cifs_put_smb_ses(ses);
2567}
2568
96daf2b0
SF		 2569static struct cifs_tcon *
2570cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
d00c28de
JL		 2571{
2572 int rc, xid;
96daf2b0 2573 struct cifs_tcon *tcon;
d00c28de
JL		 2574
2575 tcon = cifs_find_tcon(ses, volume_info->UNC);
2576 if (tcon) {
f96637be 2577 cifs_dbg(FYI, "Found match on UNC path\n");
d00c28de
JL		 2578 /* existing tcon already has a reference */
2579 cifs_put_smb_ses(ses);
2580 if (tcon->seal != volume_info->seal)
f96637be 2581 cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
d00c28de
JL		 2582 return tcon;
2583 }
2584
2e6e02ab
PS		 2585 if (!ses->server->ops->tree_connect) {
2586 rc = -ENOSYS;
2587 goto out_fail;
2588 }
2589
d00c28de
JL		 2590 tcon = tconInfoAlloc();
2591 if (tcon == NULL) {
2592 rc = -ENOMEM;
2593 goto out_fail;
2594 }
2595
2596 tcon->ses = ses;
2597 if (volume_info->password) {
2598 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2599 if (!tcon->password) {
2600 rc = -ENOMEM;
2601 goto out_fail;
2602 }
2603 }
2604
2e6e02ab
PS		 2605 /*
2606 * BB Do we need to wrap session_mutex around this TCon call and Unix
2607 * SetFS as we do on SessSetup and reconnect?
2608 */
6d5786a3 2609 xid = get_xid();
2e6e02ab
PS		 2610 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2611 volume_info->local_nls);
6d5786a3 2612 free_xid(xid);
f96637be 2613 cifs_dbg(FYI, "Tcon rc = %d\n", rc);
d00c28de
JL		 2614 if (rc)
2615 goto out_fail;
2616
2617 if (volume_info->nodfs) {
2618 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
f96637be 2619 cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
d00c28de
JL		 2620 }
2621 tcon->seal = volume_info->seal;
2e6e02ab
PS		 2622 /*
2623 * We can have only one retry value for a connection to a share so for
2624 * resources mounted more than once to the same server share the last
2625 * value passed in for the retry flag is used.
2626 */
d00c28de
JL		 2627 tcon->retry = volume_info->retry;
2628 tcon->nocase = volume_info->nocase;
2629 tcon->local_lease = volume_info->local_lease;
233839b1 2630 INIT_LIST_HEAD(&tcon->pending_opens);
d00c28de 2631
3f9bcca7 2632 spin_lock(&cifs_tcp_ses_lock);
d00c28de 2633 list_add(&tcon->tcon_list, &ses->tcon_list);
3f9bcca7 2634 spin_unlock(&cifs_tcp_ses_lock);
d00c28de 2635
d03382ce
SJ		 2636 cifs_fscache_get_super_cookie(tcon);
2637
d00c28de
JL		 2638 return tcon;
2639
2640out_fail:
2641 tconInfoFree(tcon);
2642 return ERR_PTR(rc);
2643}
2644
9d002df4
JL		 2645void
2646cifs_put_tlink(struct tcon_link *tlink)
2647{
2648 if (!tlink || IS_ERR(tlink))
2649 return;
2650
2651 if (!atomic_dec_and_test(&tlink->tl_count) ||
2652 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2653 tlink->tl_time = jiffies;
2654 return;
2655 }
2656
2657 if (!IS_ERR(tlink_tcon(tlink)))
2658 cifs_put_tcon(tlink_tcon(tlink));
2659 kfree(tlink);
2660 return;
2661}
d00c28de 2662
25c7f41e 2663static inline struct tcon_link *
cd51875d
PS		 2664cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2665{
2666 return cifs_sb->master_tlink;
2667}
25c7f41e
PS		 2668
2669static int
2670compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2671{
2672 struct cifs_sb_info *old = CIFS_SB(sb);
2673 struct cifs_sb_info *new = mnt_data->cifs_sb;
2674
2675 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2676 return 0;
2677
2678 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2679 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2680 return 0;
2681
25c7f41e 2682 /*
5eba8ab3
JL		 2683 * We want to share sb only if we don't specify an r/wsize or
2684 * specified r/wsize is greater than or equal to existing one.
25c7f41e
PS		 2685 */
2686 if (new->wsize && new->wsize < old->wsize)
2687 return 0;
2688
5eba8ab3
JL		 2689 if (new->rsize && new->rsize < old->rsize)
2690 return 0;
2691
1f68233c 2692 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
25c7f41e
PS		 2693 return 0;
2694
2695 if (old->mnt_file_mode != new->mnt_file_mode ||
2696 old->mnt_dir_mode != new->mnt_dir_mode)
2697 return 0;
2698
2699 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2700 return 0;
2701
2702 if (old->actimeo != new->actimeo)
2703 return 0;
2704
2705 return 1;
2706}
2707
2708int
2709cifs_match_super(struct super_block *sb, void *data)
2710{
2711 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2712 struct smb_vol *volume_info;
2713 struct cifs_sb_info *cifs_sb;
2714 struct TCP_Server_Info *tcp_srv;
96daf2b0
SF		 2715 struct cifs_ses *ses;
2716 struct cifs_tcon *tcon;
25c7f41e 2717 struct tcon_link *tlink;
25c7f41e
PS		 2718 int rc = 0;
2719
25c7f41e
PS		 2720 spin_lock(&cifs_tcp_ses_lock);
2721 cifs_sb = CIFS_SB(sb);
2722 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2723 if (IS_ERR(tlink)) {
2724 spin_unlock(&cifs_tcp_ses_lock);
2725 return rc;
2726 }
2727 tcon = tlink_tcon(tlink);
2728 ses = tcon->ses;
2729 tcp_srv = ses->server;
2730
2731 volume_info = mnt_data->vol;
2732
9fa114f7 2733 if (!match_server(tcp_srv, volume_info) ||
25c7f41e
PS		 2734 !match_session(ses, volume_info) ||
2735 !match_tcon(tcon, volume_info->UNC)) {
2736 rc = 0;
2737 goto out;
2738 }
2739
2740 rc = compare_mount_options(sb, mnt_data);
2741out:
25c7f41e 2742 spin_unlock(&cifs_tcp_ses_lock);
f484b5d0 2743 cifs_put_tlink(tlink);
25c7f41e
PS		 2744 return rc;
2745}
2746
1da177e4 2747int
b669f33c 2748get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2e6e02ab
PS		 2749 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2750 struct dfs_info3_param **referrals, int remap)
1da177e4
LT		 2751{
2752 char *temp_unc;
2753 int rc = 0;
2754
b669f33c 2755 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2e6e02ab
PS		 2756 return -ENOSYS;
2757
2758 *num_referrals = 0;
2759 *referrals = NULL;
1da177e4 2760
2e6e02ab 2761 if (ses->ipc_tid == 0) {
1da177e4 2762 temp_unc = kmalloc(2 /* for slashes */ +
2e6e02ab
PS		 2763 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2764 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
1da177e4
LT		 2765 if (temp_unc == NULL)
2766 return -ENOMEM;
2767 temp_unc[0] = '\\';
2768 temp_unc[1] = '\\';
2e6e02ab
PS		 2769 strcpy(temp_unc + 2, ses->serverName);
2770 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2771 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2772 nls_codepage);
f96637be 2773 cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid);
1da177e4
LT		 2774 kfree(temp_unc);
2775 }
2776 if (rc == 0)
b669f33c
PS		 2777 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2778 referrals, num_referrals,
2779 nls_codepage, remap);
2e6e02ab
PS		 2780 /*
2781 * BB - map targetUNCs to dfs_info3 structures, here or in
b669f33c 2782 * ses->server->ops->get_dfs_refer.
2e6e02ab 2783 */
1da177e4
LT		 2784
2785 return rc;
2786}
2787
09e50d55
JL		 2788#ifdef CONFIG_DEBUG_LOCK_ALLOC
2789static struct lock_class_key cifs_key[2];
2790static struct lock_class_key cifs_slock_key[2];
2791
2792static inline void
2793cifs_reclassify_socket4(struct socket *sock)
2794{
2795 struct sock *sk = sock->sk;
2796 BUG_ON(sock_owned_by_user(sk));
2797 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2798 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2799}
2800
2801static inline void
2802cifs_reclassify_socket6(struct socket *sock)
2803{
2804 struct sock *sk = sock->sk;
2805 BUG_ON(sock_owned_by_user(sk));
2806 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2807 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2808}
2809#else
2810static inline void
2811cifs_reclassify_socket4(struct socket *sock)
2812{
2813}
2814
2815static inline void
2816cifs_reclassify_socket6(struct socket *sock)
2817{
2818}
2819#endif
2820
1da177e4 2821/* See RFC1001 section 14 on representation of Netbios names */
50c2f753 2822static void rfc1002mangle(char *target, char *source, unsigned int length)
1da177e4 2823{
50c2f753 2824 unsigned int i, j;
1da177e4 2825
50c2f753 2826 for (i = 0, j = 0; i < (length); i++) {
1da177e4
LT		 2827 /* mask a nibble at a time and encode */
2828 target[j] = 'A' + (0x0F & (source[i] >> 4));
2829 target[j+1] = 'A' + (0x0F & source[i]);
50c2f753 2830 j += 2;
1da177e4
LT		 2831 }
2832
2833}
2834
3eb9a889
BG		 2835static int
2836bind_socket(struct TCP_Server_Info *server)
2837{
2838 int rc = 0;
2839 if (server->srcaddr.ss_family != AF_UNSPEC) {
2840 /* Bind to the specified local IP address */
2841 struct socket *socket = server->ssocket;
2842 rc = socket->ops->bind(socket,
2843 (struct sockaddr *) &server->srcaddr,
2844 sizeof(server->srcaddr));
2845 if (rc < 0) {
2846 struct sockaddr_in *saddr4;
2847 struct sockaddr_in6 *saddr6;
2848 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2849 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2850 if (saddr6->sin6_family == AF_INET6)
f96637be
JP		 2851 cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
2852 &saddr6->sin6_addr, rc);
3eb9a889 2853 else
f96637be
JP		 2854 cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
2855 &saddr4->sin_addr.s_addr, rc);
3eb9a889
BG		 2856 }
2857 }
2858 return rc;
2859}
1da177e4
LT		 2860
2861static int
a9f1b85e 2862ip_rfc1001_connect(struct TCP_Server_Info *server)
1da177e4
LT		 2863{
2864 int rc = 0;
a9f1b85e
PS		 2865 /*
2866 * some servers require RFC1001 sessinit before sending
2867 * negprot - BB check reconnection in case where second
2868 * sessinit is sent but no second negprot
2869 */
2870 struct rfc1002_session_packet *ses_init_buf;
2871 struct smb_hdr *smb_buf;
2872 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2873 GFP_KERNEL);
2874 if (ses_init_buf) {
2875 ses_init_buf->trailer.session_req.called_len = 32;
2876
2877 if (server->server_RFC1001_name &&
2878 server->server_RFC1001_name[0] != 0)
2879 rfc1002mangle(ses_init_buf->trailer.
2880 session_req.called_name,
2881 server->server_RFC1001_name,
2882 RFC1001_NAME_LEN_WITH_NULL);
2883 else
2884 rfc1002mangle(ses_init_buf->trailer.
2885 session_req.called_name,
2886 DEFAULT_CIFS_CALLED_NAME,
2887 RFC1001_NAME_LEN_WITH_NULL);
2888
2889 ses_init_buf->trailer.session_req.calling_len = 32;
2890
2891 /*
2892 * calling name ends in null (byte 16) from old smb
2893 * convention.
2894 */
2895 if (server->workstation_RFC1001_name &&
2896 server->workstation_RFC1001_name[0] != 0)
2897 rfc1002mangle(ses_init_buf->trailer.
2898 session_req.calling_name,
2899 server->workstation_RFC1001_name,
2900 RFC1001_NAME_LEN_WITH_NULL);
2901 else
2902 rfc1002mangle(ses_init_buf->trailer.
2903 session_req.calling_name,
2904 "LINUX_CIFS_CLNT",
2905 RFC1001_NAME_LEN_WITH_NULL);
2906
2907 ses_init_buf->trailer.session_req.scope1 = 0;
2908 ses_init_buf->trailer.session_req.scope2 = 0;
2909 smb_buf = (struct smb_hdr *)ses_init_buf;
2910
2911 /* sizeof RFC1002_SESSION_REQUEST with no scope */
be8e3b00 2912 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
a9f1b85e
PS		 2913 rc = smb_send(server, smb_buf, 0x44);
2914 kfree(ses_init_buf);
2915 /*
2916 * RFC1001 layer in at least one server
2917 * requires very short break before negprot
2918 * presumably because not expecting negprot
2919 * to follow so fast. This is a simple
2920 * solution that works without
2921 * complicating the code and causes no
2922 * significant slowing down on mount
2923 * for everyone else
2924 */
2925 usleep_range(1000, 2000);
2926 }
2927 /*
2928 * else the negprot may still work without this
2929 * even though malloc failed
2930 */
2931
2932 return rc;
2933}
2934
2935static int
2936generic_ip_connect(struct TCP_Server_Info *server)
2937{
2938 int rc = 0;
6da97910 2939 __be16 sport;
a9f1b85e 2940 int slen, sfamily;
bcf4b106 2941 struct socket *socket = server->ssocket;
a9f1b85e
PS		 2942 struct sockaddr *saddr;
2943
2944 saddr = (struct sockaddr *) &server->dstaddr;
2945
2946 if (server->dstaddr.ss_family == AF_INET6) {
2947 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2948 slen = sizeof(struct sockaddr_in6);
2949 sfamily = AF_INET6;
2950 } else {
2951 sport = ((struct sockaddr_in *) saddr)->sin_port;
2952 slen = sizeof(struct sockaddr_in);
2953 sfamily = AF_INET;
2954 }
1da177e4 2955
bcf4b106 2956 if (socket == NULL) {
f1d0c998
RL		 2957 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2958 IPPROTO_TCP, &socket, 1);
1da177e4 2959 if (rc < 0) {
f96637be 2960 cifs_dbg(VFS, "Error %d creating socket\n", rc);
a9f1b85e 2961 server->ssocket = NULL;
1da177e4 2962 return rc;
1da177e4 2963 }
bcf4b106
JL		 2964
2965 /* BB other socket options to set KEEPALIVE, NODELAY? */
f96637be 2966 cifs_dbg(FYI, "Socket created\n");
bcf4b106
JL		 2967 server->ssocket = socket;
2968 socket->sk->sk_allocation = GFP_NOFS;
a9f1b85e
PS		 2969 if (sfamily == AF_INET6)
2970 cifs_reclassify_socket6(socket);
2971 else
2972 cifs_reclassify_socket4(socket);
1da177e4
LT		 2973 }
2974
3eb9a889
BG		 2975 rc = bind_socket(server);
2976 if (rc < 0)
2977 return rc;
2978
bcf4b106
JL		 2979 /*
2980 * Eventually check for other socket options to change from
a9f1b85e
PS		 2981 * the default. sock_setsockopt not used because it expects
2982 * user space buffer
bcf4b106
JL		 2983 */
2984 socket->sk->sk_rcvtimeo = 7 * HZ;
da505c38 2985 socket->sk->sk_sndtimeo = 5 * HZ;
edf1ae40 2986
b387eaeb 2987 /* make the bufsizes depend on wsize/rsize and max requests */
bcf4b106
JL		 2988 if (server->noautotune) {
2989 if (socket->sk->sk_sndbuf < (200 * 1024))
2990 socket->sk->sk_sndbuf = 200 * 1024;
2991 if (socket->sk->sk_rcvbuf < (140 * 1024))
2992 socket->sk->sk_rcvbuf = 140 * 1024;
edf1ae40 2993 }
1da177e4 2994
6a5fa236 2995 if (server->tcp_nodelay) {
a9f1b85e 2996 int val = 1;
6a5fa236
SF		 2997 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2998 (char *)&val, sizeof(val));
2999 if (rc)
f96637be
JP		 3000 cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n",
3001 rc);
6a5fa236
SF		 3002 }
3003
f96637be 3004 cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
bcf4b106 3005 socket->sk->sk_sndbuf,
b6b38f70 3006 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
bcf4b106 3007
ee1b3ea9
JL		 3008 rc = socket->ops->connect(socket, saddr, slen, 0);
3009 if (rc < 0) {
f96637be 3010 cifs_dbg(FYI, "Error %d connecting to server\n", rc);
ee1b3ea9
JL		 3011 sock_release(socket);
3012 server->ssocket = NULL;
3013 return rc;
3014 }
3015
a9f1b85e
PS		 3016 if (sport == htons(RFC1001_PORT))
3017 rc = ip_rfc1001_connect(server);
50c2f753 3018
1da177e4
LT		 3019 return rc;
3020}
3021
3022static int
a9f1b85e 3023ip_connect(struct TCP_Server_Info *server)
1da177e4 3024{
6da97910 3025 __be16 *sport;
a9f1b85e
PS		 3026 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3027 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
1da177e4 3028
a9f1b85e
PS		 3029 if (server->dstaddr.ss_family == AF_INET6)
3030 sport = &addr6->sin6_port;
3031 else
3032 sport = &addr->sin_port;
1da177e4 3033
a9f1b85e
PS		 3034 if (*sport == 0) {
3035 int rc;
1da177e4 3036
a9f1b85e
PS		 3037 /* try with 445 port at first */
3038 *sport = htons(CIFS_PORT);
3eb9a889 3039
a9f1b85e 3040 rc = generic_ip_connect(server);
1da177e4 3041 if (rc >= 0)
a9f1b85e 3042 return rc;
6a5fa236 3043
a9f1b85e
PS		 3044 /* if it failed, try with 139 port */
3045 *sport = htons(RFC1001_PORT);
6a5fa236
SF		 3046 }
3047
a9f1b85e 3048 return generic_ip_connect(server);
1da177e4
LT		 3049}
3050
6d5786a3 3051void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
2c6292ae 3052 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
8af18971
SF		 3053{
3054 /* if we are reconnecting then should we check to see if
3055 * any requested capabilities changed locally e.g. via
3056 * remount but we can not do much about it here
3057 * if they have (even if we could detect it by the following)
3058 * Perhaps we could add a backpointer to array of sb from tcon
3059 * or if we change to make all sb to same share the same
3060 * sb as NFS - then we only have one backpointer to sb.
3061 * What if we wanted to mount the server share twice once with
3062 * and once without posixacls or posix paths? */
3063 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
50c2f753 3064
c18c842b
SF		 3065 if (vol_info && vol_info->no_linux_ext) {
3066 tcon->fsUnixInfo.Capability = 0;
3067 tcon->unix_ext = 0; /* Unix Extensions disabled */
f96637be 3068 cifs_dbg(FYI, "Linux protocol extensions disabled\n");
c18c842b
SF		 3069 return;
3070 } else if (vol_info)
3071 tcon->unix_ext = 1; /* Unix Extensions supported */
3072
3073 if (tcon->unix_ext == 0) {
f96637be 3074 cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
c18c842b
SF		 3075 return;
3076 }
50c2f753 3077
fb8c4b14 3078 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
8af18971 3079 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
f96637be 3080 cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
8af18971
SF		 3081 /* check for reconnect case in which we do not
3082 want to change the mount behavior if we can avoid it */
fb8c4b14 3083 if (vol_info == NULL) {
50c2f753 3084 /* turn off POSIX ACL and PATHNAMES if not set
8af18971
SF		 3085 originally at mount time */
3086 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3087 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
11b6d645
IM		 3088 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3089 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
f96637be 3090 cifs_dbg(VFS, "POSIXPATH support change\n");
8af18971 3091 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
11b6d645 3092 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
f96637be
JP		 3093 cifs_dbg(VFS, "possible reconnect error\n");
3094 cifs_dbg(VFS, "server disabled POSIX path support\n");
11b6d645 3095 }
8af18971 3096 }
50c2f753 3097
6848b733 3098 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
f96637be 3099 cifs_dbg(VFS, "per-share encryption not supported yet\n");
6848b733 3100
8af18971 3101 cap &= CIFS_UNIX_CAP_MASK;
75865f8c 3102 if (vol_info && vol_info->no_psx_acl)
8af18971 3103 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
75865f8c 3104 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
f96637be 3105 cifs_dbg(FYI, "negotiated posix acl support\n");
2c6292ae
AV		 3106 if (cifs_sb)
3107 cifs_sb->mnt_cifs_flags |=
3108 CIFS_MOUNT_POSIXACL;
8af18971
SF		 3109 }
3110
75865f8c 3111 if (vol_info && vol_info->posix_paths == 0)
8af18971 3112 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
75865f8c 3113 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
f96637be 3114 cifs_dbg(FYI, "negotiate posix pathnames\n");
2c6292ae
AV		 3115 if (cifs_sb)
3116 cifs_sb->mnt_cifs_flags |=
8af18971
SF		 3117 CIFS_MOUNT_POSIX_PATHS;
3118 }
50c2f753 3119
f96637be 3120 cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
8af18971 3121#ifdef CONFIG_CIFS_DEBUG2
75865f8c 3122 if (cap & CIFS_UNIX_FCNTL_CAP)
f96637be 3123 cifs_dbg(FYI, "FCNTL cap\n");
75865f8c 3124 if (cap & CIFS_UNIX_EXTATTR_CAP)
f96637be 3125 cifs_dbg(FYI, "EXTATTR cap\n");
75865f8c 3126 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
f96637be 3127 cifs_dbg(FYI, "POSIX path cap\n");
75865f8c 3128 if (cap & CIFS_UNIX_XATTR_CAP)
f96637be 3129 cifs_dbg(FYI, "XATTR cap\n");
75865f8c 3130 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
f96637be 3131 cifs_dbg(FYI, "POSIX ACL cap\n");
75865f8c 3132 if (cap & CIFS_UNIX_LARGE_READ_CAP)
f96637be 3133 cifs_dbg(FYI, "very large read cap\n");
75865f8c 3134 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
f96637be 3135 cifs_dbg(FYI, "very large write cap\n");
6848b733 3136 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
f96637be 3137 cifs_dbg(FYI, "transport encryption cap\n");
6848b733 3138 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
f96637be 3139 cifs_dbg(FYI, "mandatory transport encryption cap\n");
8af18971
SF		 3140#endif /* CIFS_DEBUG2 */
3141 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
442aa310 3142 if (vol_info == NULL) {
f96637be 3143 cifs_dbg(FYI, "resetting capabilities failed\n");
442aa310 3144 } else
f96637be 3145 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 3146
8af18971
SF		 3147 }
3148 }
3149}
3150
724d9f1c
PS		 3151void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3152 struct cifs_sb_info *cifs_sb)
b1c8d2b4 3153{
2de970ff
JL		 3154 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3155
2ced6f69
AV		 3156 spin_lock_init(&cifs_sb->tlink_tree_lock);
3157 cifs_sb->tlink_tree = RB_ROOT;
3158
25c7f41e 3159 /*
5eba8ab3
JL		 3160 * Temporarily set r/wsize for matching superblock. If we end up using
3161 * new sb then client will later negotiate it downward if needed.
25c7f41e 3162 */
5eba8ab3 3163 cifs_sb->rsize = pvolume_info->rsize;
25c7f41e
PS		 3164 cifs_sb->wsize = pvolume_info->wsize;
3165
3b795210
SF		 3166 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3167 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3168 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3169 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
f96637be
JP		 3170 cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n",
3171 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3b795210 3172
6d20e840 3173 cifs_sb->actimeo = pvolume_info->actimeo;
724d9f1c 3174 cifs_sb->local_nls = pvolume_info->local_nls;
6d20e840 3175
3b795210
SF		 3176 if (pvolume_info->noperm)
3177 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3178 if (pvolume_info->setuids)
3179 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3180 if (pvolume_info->server_ino)
3181 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3182 if (pvolume_info->remap)
3183 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3184 if (pvolume_info->no_xattr)
3185 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3186 if (pvolume_info->sfu_emul)
3187 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3188 if (pvolume_info->nobrl)
3189 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
be652445 3190 if (pvolume_info->nostrictsync)
4717bed6 3191 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
13a6e42a
SF		 3192 if (pvolume_info->mand_lock)
3193 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
d4ffff1f
PS		 3194 if (pvolume_info->rwpidforward)
3195 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3b795210
SF		 3196 if (pvolume_info->cifs_acl)
3197 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3c7c87fd 3198 if (pvolume_info->backupuid_specified) {
3d3ea8e6 3199 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3c7c87fd
SP		 3200 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3201 }
3202 if (pvolume_info->backupgid_specified) {
3d3ea8e6 3203 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3c7c87fd
SP		 3204 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3205 }
3b795210
SF		 3206 if (pvolume_info->override_uid)
3207 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3208 if (pvolume_info->override_gid)
3209 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3210 if (pvolume_info->dynperm)
3211 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
fa1df75d
SJ		 3212 if (pvolume_info->fsc)
3213 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
0eb8a132
JL		 3214 if (pvolume_info->multiuser)
3215 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3216 CIFS_MOUNT_NO_PERM);
d39454ff
PS		 3217 if (pvolume_info->strict_io)
3218 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3b795210 3219 if (pvolume_info->direct_io) {
f96637be 3220 cifs_dbg(FYI, "mounting share using direct i/o\n");
3b795210
SF		 3221 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3222 }
736a3320
SM		 3223 if (pvolume_info->mfsymlinks) {
3224 if (pvolume_info->sfu_emul) {
f96637be 3225 cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n");
736a3320
SM		 3226 } else {
3227 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3228 }
3229 }
3b795210
SF		 3230
3231 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
f96637be 3232 cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
b1c8d2b4
JL		 3233}
3234
b9bce2e9
JL		 3235static void
3236cleanup_volume_info_contents(struct smb_vol *volume_info)
1bfe73c2 3237{
b946845a 3238 kfree(volume_info->username);
1bfe73c2 3239 kzfree(volume_info->password);
95c75454 3240 kfree(volume_info->UNC);
b946845a
SF		 3241 kfree(volume_info->domainname);
3242 kfree(volume_info->iocharset);
1bfe73c2 3243 kfree(volume_info->prepath);
b9bce2e9
JL		 3244}
3245
3246void
3247cifs_cleanup_volume_info(struct smb_vol *volume_info)
3248{
3249 if (!volume_info)
3250 return;
3251 cleanup_volume_info_contents(volume_info);
1bfe73c2 3252 kfree(volume_info);
1bfe73c2
IM		 3253}
3254
b9bce2e9 3255
2d6d589d 3256#ifdef CONFIG_CIFS_DFS_UPCALL
6d3ea7e4
SF		 3257/*
3258 * cifs_build_path_to_root returns full path to root when we do not have an
3259 * exiting connection (tcon)
3260 */
1bfe73c2 3261static char *
b2a0fa15 3262build_unc_path_to_root(const struct smb_vol *vol,
1bfe73c2
IM		 3263 const struct cifs_sb_info *cifs_sb)
3264{
b2a0fa15 3265 char *full_path, *pos;
839db3d1 3266 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
b2a0fa15 3267 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
1bfe73c2 3268
b2a0fa15 3269 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
1bfe73c2
IM		 3270 if (full_path == NULL)
3271 return ERR_PTR(-ENOMEM);
3272
b2a0fa15
JL		 3273 strncpy(full_path, vol->UNC, unc_len);
3274 pos = full_path + unc_len;
3275
3276 if (pplen) {
1fc29bac
JL		 3277 *pos = CIFS_DIR_SEP(cifs_sb);
3278 strncpy(pos + 1, vol->prepath, pplen);
b2a0fa15
JL		 3279 pos += pplen;
3280 }
3281
3282 *pos = '\0'; /* add trailing null */
f87d39d9 3283 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
f96637be 3284 cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path);
1bfe73c2
IM		 3285 return full_path;
3286}
dd613945
SF		 3287
3288/*
3289 * Perform a dfs referral query for a share and (optionally) prefix
3290 *
046462ab
SF		 3291 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3292 * to a string containing updated options for the submount. Otherwise it
3293 * will be left untouched.
dd613945
SF		 3294 *
3295 * Returns the rc from get_dfs_path to the caller, which can be used to
3296 * determine whether there were referrals.
3297 */
3298static int
b669f33c 3299expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
dd613945 3300 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
046462ab 3301 int check_prefix)
dd613945
SF		 3302{
3303 int rc;
3304 unsigned int num_referrals = 0;
3305 struct dfs_info3_param *referrals = NULL;
3306 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3307
3308 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3309 if (IS_ERR(full_path))
3310 return PTR_ERR(full_path);
3311
3312 /* For DFS paths, skip the first '\' of the UNC */
3313 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3314
b669f33c 3315 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
dd613945
SF		 3316 &num_referrals, &referrals,
3317 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3318
3319 if (!rc && num_referrals > 0) {
3320 char *fake_devname = NULL;
3321
3322 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3323 full_path + 1, referrals,
3324 &fake_devname);
3325
3326 free_dfs_info_array(referrals, num_referrals);
046462ab 3327
dd613945
SF		 3328 if (IS_ERR(mdata)) {
3329 rc = PTR_ERR(mdata);
3330 mdata = NULL;
b9bce2e9
JL		 3331 } else {
3332 cleanup_volume_info_contents(volume_info);
b9bce2e9
JL		 3333 rc = cifs_setup_volume_info(volume_info, mdata,
3334 fake_devname);
dd613945 3335 }
b9bce2e9
JL		 3336 kfree(fake_devname);
3337 kfree(cifs_sb->mountdata);
046462ab 3338 cifs_sb->mountdata = mdata;
dd613945
SF		 3339 }
3340 kfree(full_path);
3341 return rc;
3342}
2d6d589d 3343#endif
1bfe73c2 3344
04db79b0
JL		 3345static int
3346cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3347 const char *devname)
1da177e4 3348{
724d9f1c 3349 int rc = 0;
1da177e4 3350
04db79b0
JL		 3351 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3352 return -EINVAL;
1da177e4 3353
7586b765 3354 if (volume_info->nullauth) {
f96637be 3355 cifs_dbg(FYI, "Anonymous login\n");
04febabc
JL		 3356 kfree(volume_info->username);
3357 volume_info->username = NULL;
7586b765 3358 } else if (volume_info->username) {
1da177e4 3359 /* BB fixme parse for domain name here */
f96637be 3360 cifs_dbg(FYI, "Username: %s\n", volume_info->username);
1da177e4 3361 } else {
f96637be 3362 cifs_dbg(VFS, "No username specified\n");
50c2f753
SF		 3363 /* In userspace mount helper we can get user name from alternate
3364 locations such as env variables and files on disk */
04db79b0 3365 return -EINVAL;
1da177e4
LT		 3366 }
3367
1da177e4 3368 /* this is needed for ASCII cp to Unicode converts */
7586b765 3369 if (volume_info->iocharset == NULL) {
a5fc4ce0
JL		 3370 /* load_nls_default cannot return null */
3371 volume_info->local_nls = load_nls_default();
1da177e4 3372 } else {
a5fc4ce0
JL		 3373 volume_info->local_nls = load_nls(volume_info->iocharset);
3374 if (volume_info->local_nls == NULL) {
f96637be 3375 cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
b6b38f70 3376 volume_info->iocharset);
04db79b0 3377 return -ELIBACC;
1da177e4
LT		 3378 }
3379 }
724d9f1c 3380
724d9f1c
PS		 3381 return rc;
3382}
3383
04db79b0
JL		 3384struct smb_vol *
3385cifs_get_volume_info(char *mount_data, const char *devname)
3386{
3387 int rc;
3388 struct smb_vol *volume_info;
3389
6ee9542a 3390 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
04db79b0
JL		 3391 if (!volume_info)
3392 return ERR_PTR(-ENOMEM);
3393
3394 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3395 if (rc) {
3396 cifs_cleanup_volume_info(volume_info);
3397 volume_info = ERR_PTR(rc);
3398 }
3399
3400 return volume_info;
3401}
3402
724d9f1c 3403int
2c6292ae 3404cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
724d9f1c 3405{
1daaae8f 3406 int rc;
6d5786a3 3407 unsigned int xid;
af4281dc 3408 struct cifs_ses *ses;
96daf2b0 3409 struct cifs_tcon *tcon;
af4281dc 3410 struct TCP_Server_Info *server;
724d9f1c
PS		 3411 char *full_path;
3412 struct tcon_link *tlink;
3413#ifdef CONFIG_CIFS_DFS_UPCALL
3414 int referral_walks_count = 0;
20547490 3415#endif
dd854466
AV		 3416
3417 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3418 if (rc)
3419 return rc;
3420
20547490 3421#ifdef CONFIG_CIFS_DFS_UPCALL
724d9f1c
PS		 3422try_mount_again:
3423 /* cleanup activities if we're chasing a referral */
3424 if (referral_walks_count) {
3425 if (tcon)
3426 cifs_put_tcon(tcon);
af4281dc
PS		 3427 else if (ses)
3428 cifs_put_smb_ses(ses);
724d9f1c 3429
6d5786a3 3430 free_xid(xid);
724d9f1c
PS		 3431 }
3432#endif
1daaae8f 3433 rc = 0;
724d9f1c 3434 tcon = NULL;
af4281dc
PS		 3435 ses = NULL;
3436 server = NULL;
724d9f1c
PS		 3437 full_path = NULL;
3438 tlink = NULL;
3439
6d5786a3 3440 xid = get_xid();
1da177e4 3441
63c038c2 3442 /* get a reference to a tcp session */
af4281dc
PS		 3443 server = cifs_get_tcp_session(volume_info);
3444 if (IS_ERR(server)) {
3445 rc = PTR_ERR(server);
dd854466 3446 bdi_destroy(&cifs_sb->bdi);
63c038c2 3447 goto out;
1da177e4
LT		 3448 }
3449
36988c76 3450 /* get a reference to a SMB session */
af4281dc
PS		 3451 ses = cifs_get_smb_ses(server, volume_info);
3452 if (IS_ERR(ses)) {
3453 rc = PTR_ERR(ses);
3454 ses = NULL;
36988c76 3455 goto mount_fail_check;
1da177e4 3456 }
50c2f753 3457
d00c28de 3458 /* search for existing tcon to this server share */
af4281dc 3459 tcon = cifs_get_tcon(ses, volume_info);
d00c28de
JL		 3460 if (IS_ERR(tcon)) {
3461 rc = PTR_ERR(tcon);
3462 tcon = NULL;
1bfe73c2 3463 goto remote_path_check;
d00c28de 3464 }
1bfe73c2 3465
d82c2df5 3466 /* tell server which Unix caps we support */
29e20f9c 3467 if (cap_unix(tcon->ses)) {
d82c2df5
SF		 3468 /* reset of caps checks mount to see if unix extensions
3469 disabled for just this mount */
2c6292ae 3470 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
6848b733
SF		 3471 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3472 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3473 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3474 rc = -EACCES;
3475 goto mount_fail_check;
3476 }
3477 } else
d82c2df5 3478 tcon->unix_ext = 0; /* server does not support them */
c18c842b 3479
af4281dc
PS		 3480 /* do not care if a following call succeed - informational */
3481 if (!tcon->ipc && server->ops->qfs_tcon)
3482 server->ops->qfs_tcon(xid, tcon);
6848b733 3483
24985c53
PS		 3484 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3485 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
f7910cbd 3486
66bfaadc 3487 /* tune readahead according to rsize */
8f71465c 3488 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
f7910cbd 3489
1bfe73c2 3490remote_path_check:
c1508ca2
SF		 3491#ifdef CONFIG_CIFS_DFS_UPCALL
3492 /*
3493 * Perform an unconditional check for whether there are DFS
3494 * referrals for this path without prefix, to provide support
3495 * for DFS referrals from w2k8 servers which don't seem to respond
3496 * with PATH_NOT_COVERED to requests that include the prefix.
3497 * Chase the referral if found, otherwise continue normally.
3498 */
3499 if (referral_walks_count == 0) {
af4281dc
PS		 3500 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3501 false);
c1508ca2
SF		 3502 if (!refrc) {
3503 referral_walks_count++;
3504 goto try_mount_again;
3505 }
3506 }
3507#endif
3508
f87d39d9 3509 /* check if a whole path is not remote */
70945643 3510 if (!rc && tcon) {
68889f26
PS		 3511 if (!server->ops->is_path_accessible) {
3512 rc = -ENOSYS;
3513 goto mount_fail_check;
3514 }
6d3ea7e4
SF		 3515 /*
3516 * cifs_build_path_to_root works only when we have a valid tcon
3517 */
3518 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
e4cce94c
IM		 3519 if (full_path == NULL) {
3520 rc = -ENOMEM;
3521 goto mount_fail_check;
3522 }
68889f26
PS		 3523 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3524 full_path);
03ceace5 3525 if (rc != 0 && rc != -EREMOTE) {
e4cce94c
IM		 3526 kfree(full_path);
3527 goto mount_fail_check;
3528 }
3529 kfree(full_path);
3530 }
3531
1bfe73c2
IM		 3532 /* get referral if needed */
3533 if (rc == -EREMOTE) {
d036f50f 3534#ifdef CONFIG_CIFS_DFS_UPCALL
5c2503a8
IM		 3535 if (referral_walks_count > MAX_NESTED_LINKS) {
3536 /*
3537 * BB: when we implement proper loop detection,
3538 * we will remove this check. But now we need it
3539 * to prevent an indefinite loop if 'DFS tree' is
3540 * misconfigured (i.e. has loops).
3541 */
3542 rc = -ELOOP;
3543 goto mount_fail_check;
3544 }
1bfe73c2 3545
af4281dc 3546 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
7b91e266 3547
dd613945 3548 if (!rc) {
5c2503a8 3549 referral_walks_count++;
1bfe73c2
IM		 3550 goto try_mount_again;
3551 }
dd613945 3552 goto mount_fail_check;
d036f50f
SF		 3553#else /* No DFS support, return error on mount */
3554 rc = -EOPNOTSUPP;
3555#endif
1bfe73c2
IM		 3556 }
3557
9d002df4
JL		 3558 if (rc)
3559 goto mount_fail_check;
3560
3561 /* now, hang the tcon off of the superblock */
3562 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3563 if (tlink == NULL) {
3564 rc = -ENOMEM;
3565 goto mount_fail_check;
3566 }
3567
af4281dc 3568 tlink->tl_uid = ses->linux_uid;
9d002df4
JL		 3569 tlink->tl_tcon = tcon;
3570 tlink->tl_time = jiffies;
3571 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3572 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3573
b647c35f 3574 cifs_sb->master_tlink = tlink;
9d002df4 3575 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 3576 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
9d002df4 3577 spin_unlock(&cifs_sb->tlink_tree_lock);
413e661c 3578
da472fc8 3579 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 3580 TLINK_IDLE_EXPIRE);
3581
1bfe73c2
IM		 3582mount_fail_check:
3583 /* on error free sesinfo and tcon struct if needed */
3584 if (rc) {
1bfe73c2 3585 /* If find_unc succeeded then rc == 0 so we can not end */
25985edc 3586 /* up accidentally freeing someone elses tcon struct */
1bfe73c2
IM		 3587 if (tcon)
3588 cifs_put_tcon(tcon);
af4281dc
PS		 3589 else if (ses)
3590 cifs_put_smb_ses(ses);
1bfe73c2 3591 else
af4281dc 3592 cifs_put_tcp_session(server);
dd854466 3593 bdi_destroy(&cifs_sb->bdi);
1bfe73c2
IM		 3594 }
3595
70fe7dc0 3596out:
6d5786a3 3597 free_xid(xid);
1da177e4
LT		 3598 return rc;
3599}
3600
8d1bca32
JL		 3601/*
3602 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3603 * pointer may be NULL.
3604 */
1da177e4 3605int
2e6e02ab 3606CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
96daf2b0 3607 const char *tree, struct cifs_tcon *tcon,
1da177e4
LT		 3608 const struct nls_table *nls_codepage)
3609{
3610 struct smb_hdr *smb_buffer;
3611 struct smb_hdr *smb_buffer_response;
3612 TCONX_REQ *pSMB;
3613 TCONX_RSP *pSMBr;
3614 unsigned char *bcc_ptr;
3615 int rc = 0;
690c522f
JL		 3616 int length;
3617 __u16 bytes_left, count;
1da177e4
LT		 3618
3619 if (ses == NULL)
3620 return -EIO;
3621
3622 smb_buffer = cifs_buf_get();
ca43e3be 3623 if (smb_buffer == NULL)
1da177e4 3624 return -ENOMEM;
ca43e3be 3625
1da177e4
LT		 3626 smb_buffer_response = smb_buffer;
3627
3628 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3629 NULL /*no tid */ , 4 /*wct */ );
1982c344 3630
88257360 3631 smb_buffer->Mid = get_next_mid(ses->server);
1da177e4
LT		 3632 smb_buffer->Uid = ses->Suid;
3633 pSMB = (TCONX_REQ *) smb_buffer;
3634 pSMBr = (TCONX_RSP *) smb_buffer_response;
3635
3636 pSMB->AndXCommand = 0xFF;
3637 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
1da177e4 3638 bcc_ptr = &pSMB->Password[0];
8d1bca32 3639 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
eeac8047 3640 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
7c7b25bc 3641 *bcc_ptr = 0; /* password is null byte */
eeac8047 3642 bcc_ptr++; /* skip password */
7c7b25bc 3643 /* already aligned so no need to do it below */
eeac8047 3644 } else {
540b2e37 3645 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
eeac8047
SF		 3646 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3647 specified as required (when that support is added to
3648 the vfs in the future) as only NTLM or the much
7c7b25bc 3649 weaker LANMAN (which we do not send by default) is accepted
eeac8047
SF		 3650 by Samba (not sure whether other servers allow
3651 NTLMv2 password here) */
7c7b25bc 3652#ifdef CONFIG_CIFS_WEAK_PW_HASH
04912d6a 3653 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
3f618223 3654 (ses->sectype == LANMAN))
d3ba50b1 3655 calc_lanman_hash(tcon->password, ses->server->cryptkey,
96daf2b0 3656 ses->server->sec_mode &
4e53a3fb
JL		 3657 SECMODE_PW_ENCRYPT ? true : false,
3658 bcc_ptr);
7c7b25bc
SF		 3659 else
3660#endif /* CIFS_WEAK_PW_HASH */
ee2c9258 3661 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
9ef5992e 3662 bcc_ptr, nls_codepage);
eeac8047 3663
540b2e37 3664 bcc_ptr += CIFS_AUTH_RESP_SIZE;
fb8c4b14 3665 if (ses->capabilities & CAP_UNICODE) {
7c7b25bc
SF		 3666 /* must align unicode strings */
3667 *bcc_ptr = 0; /* null byte password */
3668 bcc_ptr++;
3669 }
eeac8047 3670 }
1da177e4 3671
38d77c50 3672 if (ses->server->sign)
1da177e4
LT		 3673 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3674
3675 if (ses->capabilities & CAP_STATUS32) {
3676 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3677 }
3678 if (ses->capabilities & CAP_DFS) {
3679 smb_buffer->Flags2 |= SMBFLG2_DFS;
3680 }
3681 if (ses->capabilities & CAP_UNICODE) {
3682 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3683 length =
acbbb76a 3684 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
50c2f753 3685 6 /* max utf8 char length in bytes */ *
a878fb22
SF		 3686 (/* server len*/ + 256 /* share len */), nls_codepage);
3687 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
1da177e4
LT		 3688 bcc_ptr += 2; /* skip trailing null */
3689 } else { /* ASCII */
1da177e4
LT		 3690 strcpy(bcc_ptr, tree);
3691 bcc_ptr += strlen(tree) + 1;
3692 }
3693 strcpy(bcc_ptr, "?????");
3694 bcc_ptr += strlen("?????");
3695 bcc_ptr += 1;
3696 count = bcc_ptr - &pSMB->Password[0];
be8e3b00
SF		 3697 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3698 pSMB->hdr.smb_buf_length) + count);
1da177e4
LT		 3699 pSMB->ByteCount = cpu_to_le16(count);
3700
133672ef 3701 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
7749981e 3702 0);
1da177e4 3703
1da177e4
LT		 3704 /* above now done in SendReceive */
3705 if ((rc == 0) && (tcon != NULL)) {
0e0d2cf3
SF		 3706 bool is_unicode;
3707
1da177e4 3708 tcon->tidStatus = CifsGood;
3b795210 3709 tcon->need_reconnect = false;
1da177e4
LT		 3710 tcon->tid = smb_buffer_response->Tid;
3711 bcc_ptr = pByteArea(smb_buffer_response);
690c522f 3712 bytes_left = get_bcc(smb_buffer_response);
cc20c031 3713 length = strnlen(bcc_ptr, bytes_left - 2);
0e0d2cf3
SF		 3714 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3715 is_unicode = true;
3716 else
3717 is_unicode = false;
3718
cc20c031 3719
50c2f753 3720 /* skip service field (NB: this field is always ASCII) */
7f8ed420
SF		 3721 if (length == 3) {
3722 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3723 (bcc_ptr[2] == 'C')) {
f96637be 3724 cifs_dbg(FYI, "IPC connection\n");
7f8ed420
SF		 3725 tcon->ipc = 1;
3726 }
3727 } else if (length == 2) {
3728 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3729 /* the most common case */
f96637be 3730 cifs_dbg(FYI, "disk share connection\n");
7f8ed420
SF		 3731 }
3732 }
50c2f753 3733 bcc_ptr += length + 1;
cc20c031 3734 bytes_left -= (length + 1);
1da177e4 3735 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
cc20c031
JL		 3736
3737 /* mostly informational -- no need to fail on error here */
90a98b2f 3738 kfree(tcon->nativeFileSystem);
acbbb76a 3739 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
0e0d2cf3 3740 bytes_left, is_unicode,
cc20c031
JL		 3741 nls_codepage);
3742
f96637be 3743 cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
cc20c031 3744
fb8c4b14 3745 if ((smb_buffer_response->WordCount == 3) ||
1a4e15a0
SF		 3746 (smb_buffer_response->WordCount == 7))
3747 /* field is in same location */
3979877e
SF		 3748 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3749 else
3750 tcon->Flags = 0;
f96637be 3751 cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
1da177e4 3752 } else if ((rc == 0) && tcon == NULL) {
50c2f753 3753 /* all we need to save for IPC$ connection */
1da177e4
LT		 3754 ses->ipc_tid = smb_buffer_response->Tid;
3755 }
3756
a8a11d39 3757 cifs_buf_release(smb_buffer);
1da177e4
LT		 3758 return rc;
3759}
3760
2a9b9951
AV		 3761void
3762cifs_umount(struct cifs_sb_info *cifs_sb)
1da177e4 3763{
b647c35f
JL		 3764 struct rb_root *root = &cifs_sb->tlink_tree;
3765 struct rb_node *node;
3766 struct tcon_link *tlink;
9d002df4 3767
2de970ff
JL		 3768 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3769
b647c35f
JL		 3770 spin_lock(&cifs_sb->tlink_tree_lock);
3771 while ((node = rb_first(root))) {
3772 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3773 cifs_get_tlink(tlink);
3774 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3775 rb_erase(node, root);
1da177e4 3776
b647c35f
JL		 3777 spin_unlock(&cifs_sb->tlink_tree_lock);
3778 cifs_put_tlink(tlink);
3779 spin_lock(&cifs_sb->tlink_tree_lock);
3780 }
3781 spin_unlock(&cifs_sb->tlink_tree_lock);
50c2f753 3782
dd854466 3783 bdi_destroy(&cifs_sb->bdi);
d757d71b
AV		 3784 kfree(cifs_sb->mountdata);
3785 unload_nls(cifs_sb->local_nls);
3786 kfree(cifs_sb);
50c2f753 3787}
1da177e4 3788
286170aa
PS		 3789int
3790cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
1da177e4
LT		 3791{
3792 int rc = 0;
198b5682 3793 struct TCP_Server_Info *server = ses->server;
1da177e4 3794
286170aa
PS		 3795 if (!server->ops->need_neg || !server->ops->negotiate)
3796 return -ENOSYS;
3797
198b5682 3798 /* only send once per connect */
286170aa 3799 if (!server->ops->need_neg(server))
198b5682
JL		 3800 return 0;
3801
45275789 3802 set_credits(server, 1);
286170aa
PS		 3803
3804 rc = server->ops->negotiate(xid, ses);
198b5682
JL		 3805 if (rc == 0) {
3806 spin_lock(&GlobalMid_Lock);
7fdbaa1b 3807 if (server->tcpStatus == CifsNeedNegotiate)
198b5682
JL		 3808 server->tcpStatus = CifsGood;
3809 else
3810 rc = -EHOSTDOWN;
3811 spin_unlock(&GlobalMid_Lock);
198b5682
JL		 3812 }
3813
3814 return rc;
3815}
3816
58c45c58
PS		 3817int
3818cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3819 struct nls_table *nls_info)
198b5682 3820{
58c45c58 3821 int rc = -ENOSYS;
198b5682 3822 struct TCP_Server_Info *server = ses->server;
26b994fa 3823
198b5682 3824 ses->capabilities = server->capabilities;
26b994fa 3825 if (linuxExtEnabled == 0)
29e20f9c 3826 ses->capabilities &= (~server->vals->cap_unix);
20418acd 3827
f96637be 3828 cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
96daf2b0 3829 server->sec_mode, server->capabilities, server->timeAdj);
cb7691b6 3830
58c45c58
PS		 3831 if (server->ops->sess_setup)
3832 rc = server->ops->sess_setup(xid, ses, nls_info);
3833
26b994fa 3834 if (rc) {
f96637be 3835 cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
26b994fa 3836 } else {
b13ce4bb 3837 mutex_lock(&server->srv_mutex);
5d0d2882 3838 if (!server->session_estab) {
21e73393 3839 server->session_key.response = ses->auth_key.response;
5d0d2882 3840 server->session_key.len = ses->auth_key.len;
21e73393
SP		 3841 server->sequence_number = 0x2;
3842 server->session_estab = true;
3843 ses->auth_key.response = NULL;
5d0d2882
SP		 3844 }
3845 mutex_unlock(&server->srv_mutex);
3846
f96637be 3847 cifs_dbg(FYI, "CIFS Session Established successfully\n");
20418acd 3848 spin_lock(&GlobalMid_Lock);
198b5682
JL		 3849 ses->status = CifsGood;
3850 ses->need_reconnect = false;
20418acd 3851 spin_unlock(&GlobalMid_Lock);
1da177e4 3852 }
26b994fa 3853
21e73393
SP		 3854 kfree(ses->auth_key.response);
3855 ses->auth_key.response = NULL;
3856 ses->auth_key.len = 0;
d3686d54
SP		 3857 kfree(ses->ntlmssp);
3858 ses->ntlmssp = NULL;
21e73393 3859
1da177e4
LT		 3860 return rc;
3861}
3862
8a8798a5
JL		 3863static int
3864cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3865{
3f618223
JL		 3866 vol->sectype = ses->sectype;
3867
3868 /* krb5 is special, since we don't need username or pw */
3869 if (vol->sectype == Kerberos)
8a8798a5 3870 return 0;
8a8798a5
JL		 3871
3872 return cifs_set_cifscreds(vol, ses);
3873}
3874
96daf2b0 3875static struct cifs_tcon *
6d4a0832 3876cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
9d002df4 3877{
8a8798a5 3878 int rc;
96daf2b0
SF		 3879 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3880 struct cifs_ses *ses;
3881 struct cifs_tcon *tcon = NULL;
9d002df4 3882 struct smb_vol *vol_info;
9d002df4
JL		 3883
3884 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
803ab977
DC		 3885 if (vol_info == NULL)
3886 return ERR_PTR(-ENOMEM);
9d002df4 3887
9d002df4
JL		 3888 vol_info->local_nls = cifs_sb->local_nls;
3889 vol_info->linux_uid = fsuid;
3890 vol_info->cred_uid = fsuid;
3891 vol_info->UNC = master_tcon->treeName;
3892 vol_info->retry = master_tcon->retry;
3893 vol_info->nocase = master_tcon->nocase;
3894 vol_info->local_lease = master_tcon->local_lease;
3895 vol_info->no_linux_ext = !master_tcon->unix_ext;
28e11bd8
JL		 3896 vol_info->sectype = master_tcon->ses->sectype;
3897 vol_info->sign = master_tcon->ses->sign;
9d002df4 3898
8a8798a5
JL		 3899 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3900 if (rc) {
3901 tcon = ERR_PTR(rc);
3902 goto out;
3903 }
9d002df4
JL		 3904
3905 /* get a reference for the same TCP session */
3f9bcca7 3906 spin_lock(&cifs_tcp_ses_lock);
9d002df4 3907 ++master_tcon->ses->server->srv_count;
3f9bcca7 3908 spin_unlock(&cifs_tcp_ses_lock);
9d002df4
JL		 3909
3910 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3911 if (IS_ERR(ses)) {
96daf2b0 3912 tcon = (struct cifs_tcon *)ses;
9d002df4
JL		 3913 cifs_put_tcp_session(master_tcon->ses->server);
3914 goto out;
3915 }
3916
3917 tcon = cifs_get_tcon(ses, vol_info);
3918 if (IS_ERR(tcon)) {
3919 cifs_put_smb_ses(ses);
3920 goto out;
3921 }
3922
29e20f9c 3923 if (cap_unix(ses))
9d002df4
JL		 3924 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3925out:
8a8798a5
JL		 3926 kfree(vol_info->username);
3927 kfree(vol_info->password);
9d002df4
JL		 3928 kfree(vol_info);
3929
3930 return tcon;
3931}
3932
96daf2b0 3933struct cifs_tcon *
9d002df4
JL		 3934cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3935{
3936 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3937}
3938
3939static int
3940cifs_sb_tcon_pending_wait(void *unused)
3941{
3942 schedule();
3943 return signal_pending(current) ? -ERESTARTSYS : 0;
3944}
3945
b647c35f
JL		 3946/* find and return a tlink with given uid */
3947static struct tcon_link *
6d4a0832 3948tlink_rb_search(struct rb_root *root, kuid_t uid)
b647c35f
JL		 3949{
3950 struct rb_node *node = root->rb_node;
3951 struct tcon_link *tlink;
3952
3953 while (node) {
3954 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3955
6d4a0832 3956 if (uid_gt(tlink->tl_uid, uid))
b647c35f 3957 node = node->rb_left;
6d4a0832 3958 else if (uid_lt(tlink->tl_uid, uid))
b647c35f
JL		 3959 node = node->rb_right;
3960 else
3961 return tlink;
3962 }
3963 return NULL;
3964}
3965
3966/* insert a tcon_link into the tree */
3967static void
3968tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3969{
3970 struct rb_node **new = &(root->rb_node), *parent = NULL;
3971 struct tcon_link *tlink;
3972
3973 while (*new) {
3974 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3975 parent = *new;
3976
6d4a0832 3977 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
b647c35f
JL		 3978 new = &((*new)->rb_left);
3979 else
3980 new = &((*new)->rb_right);
3981 }
3982
3983 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3984 rb_insert_color(&new_tlink->tl_rbnode, root);
3985}
3986
9d002df4
JL		 3987/*
3988 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3989 * current task.
3990 *
3991 * If the superblock doesn't refer to a multiuser mount, then just return
3992 * the master tcon for the mount.
3993 *
6ef933a3 3994 * First, search the rbtree for an existing tcon for this fsuid. If one
9d002df4
JL		 3995 * exists, then check to see if it's pending construction. If it is then wait
3996 * for construction to complete. Once it's no longer pending, check to see if
3997 * it failed and either return an error or retry construction, depending on
3998 * the timeout.
3999 *
4000 * If one doesn't exist then insert a new tcon_link struct into the tree and
4001 * try to construct a new one.
4002 */
4003struct tcon_link *
4004cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4005{
4006 int ret;
6d4a0832 4007 kuid_t fsuid = current_fsuid();
9d002df4
JL		 4008 struct tcon_link *tlink, *newtlink;
4009
4010 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4011 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4012
4013 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 4014 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4015 if (tlink)
4016 cifs_get_tlink(tlink);
4017 spin_unlock(&cifs_sb->tlink_tree_lock);
4018
4019 if (tlink == NULL) {
4020 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4021 if (newtlink == NULL)
4022 return ERR_PTR(-ENOMEM);
b647c35f 4023 newtlink->tl_uid = fsuid;
9d002df4
JL		 4024 newtlink->tl_tcon = ERR_PTR(-EACCES);
4025 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4026 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4027 cifs_get_tlink(newtlink);
4028
9d002df4
JL		 4029 spin_lock(&cifs_sb->tlink_tree_lock);
4030 /* was one inserted after previous search? */
b647c35f 4031 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4032 if (tlink) {
4033 cifs_get_tlink(tlink);
4034 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4035 kfree(newtlink);
4036 goto wait_for_construction;
4037 }
9d002df4 4038 tlink = newtlink;
b647c35f
JL		 4039 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4040 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4041 } else {
4042wait_for_construction:
4043 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4044 cifs_sb_tcon_pending_wait,
4045 TASK_INTERRUPTIBLE);
4046 if (ret) {
4047 cifs_put_tlink(tlink);
4048 return ERR_PTR(ret);
4049 }
4050
4051 /* if it's good, return it */
4052 if (!IS_ERR(tlink->tl_tcon))
4053 return tlink;
4054
4055 /* return error if we tried this already recently */
4056 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4057 cifs_put_tlink(tlink);
4058 return ERR_PTR(-EACCES);
4059 }
4060
4061 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4062 goto wait_for_construction;
4063 }
4064
4065 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4066 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4067 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4068
4069 if (IS_ERR(tlink->tl_tcon)) {
4070 cifs_put_tlink(tlink);
4071 return ERR_PTR(-EACCES);
4072 }
4073
4074 return tlink;
4075}
2de970ff
JL		 4076
4077/*
4078 * periodic workqueue job that scans tcon_tree for a superblock and closes
4079 * out tcons.
4080 */
4081static void
4082cifs_prune_tlinks(struct work_struct *work)
4083{
4084 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4085 prune_tlinks.work);
b647c35f
JL		 4086 struct rb_root *root = &cifs_sb->tlink_tree;
4087 struct rb_node *node = rb_first(root);
4088 struct rb_node *tmp;
4089 struct tcon_link *tlink;
2de970ff 4090
b647c35f
JL		 4091 /*
4092 * Because we drop the spinlock in the loop in order to put the tlink
4093 * it's not guarded against removal of links from the tree. The only
4094 * places that remove entries from the tree are this function and
4095 * umounts. Because this function is non-reentrant and is canceled
4096 * before umount can proceed, this is safe.
4097 */
4098 spin_lock(&cifs_sb->tlink_tree_lock);
4099 node = rb_first(root);
4100 while (node != NULL) {
4101 tmp = node;
4102 node = rb_next(tmp);
4103 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4104
4105 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4106 atomic_read(&tlink->tl_count) != 0 ||
4107 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4108 continue;
2de970ff 4109
b647c35f
JL		 4110 cifs_get_tlink(tlink);
4111 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4112 rb_erase(tmp, root);
4113
4114 spin_unlock(&cifs_sb->tlink_tree_lock);
4115 cifs_put_tlink(tlink);
4116 spin_lock(&cifs_sb->tlink_tree_lock);
4117 }
4118 spin_unlock(&cifs_sb->tlink_tree_lock);
2de970ff 4119
da472fc8 4120 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 4121 TLINK_IDLE_EXPIRE);
4122}
Linux kernel - Deliverables
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