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[CIFS] Fix SMB2 negotiation support to select only one dialect (based on vers=)
[deliverable/linux.git] / fs / cifs / connect.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/cifs/connect.c
3 *
1080ef75 4 * Copyright (C) International Business Machines Corp., 2002,2011
1da177e4
LT		 5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
fb8c4b14 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1da177e4
LT		 20 */
21#include <linux/fs.h>
22#include <linux/net.h>
23#include <linux/string.h>
24#include <linux/list.h>
25#include <linux/wait.h>
5a0e3ad6 26#include <linux/slab.h>
1da177e4
LT		 27#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
b8643e1b 31#include <linux/delay.h>
f191401f 32#include <linux/completion.h>
aaf737ad 33#include <linux/kthread.h>
0ae0efad 34#include <linux/pagevec.h>
7dfb7103 35#include <linux/freezer.h>
5c2503a8 36#include <linux/namei.h>
1da177e4
LT		 37#include <asm/uaccess.h>
38#include <asm/processor.h>
50b64e3b 39#include <linux/inet.h>
143cb494 40#include <linux/module.h>
8a8798a5 41#include <keys/user-type.h>
0e2bedaa 42#include <net/ipv6.h>
8830d7e0
SP		 43#include <linux/parser.h>
44
1da177e4
LT		 45#include "cifspdu.h"
46#include "cifsglob.h"
47#include "cifsproto.h"
48#include "cifs_unicode.h"
49#include "cifs_debug.h"
50#include "cifs_fs_sb.h"
51#include "ntlmssp.h"
52#include "nterr.h"
53#include "rfc1002pdu.h"
488f1d2d 54#include "fscache.h"
1da177e4
LT		 55
56#define CIFS_PORT 445
57#define RFC1001_PORT 139
58
1da177e4
LT		 59extern mempool_t *cifs_req_poolp;
60
2de970ff 61/* FIXME: should these be tunable? */
9d002df4 62#define TLINK_ERROR_EXPIRE (1 * HZ)
2de970ff 63#define TLINK_IDLE_EXPIRE (600 * HZ)
9d002df4 64
8830d7e0
SP		 65enum {
66
67 /* Mount options that take no arguments */
68 Opt_user_xattr, Opt_nouser_xattr,
69 Opt_forceuid, Opt_noforceuid,
70 Opt_noblocksend, Opt_noautotune,
71 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
72 Opt_mapchars, Opt_nomapchars, Opt_sfu,
73 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
74 Opt_noposixpaths, Opt_nounix,
75 Opt_nocase,
76 Opt_brl, Opt_nobrl,
77 Opt_forcemandatorylock, Opt_setuids,
78 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
79 Opt_nohard, Opt_nosoft,
80 Opt_nointr, Opt_intr,
81 Opt_nostrictsync, Opt_strictsync,
82 Opt_serverino, Opt_noserverino,
83 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
84 Opt_acl, Opt_noacl, Opt_locallease,
1b359204 85 Opt_sign, Opt_seal, Opt_noac,
8830d7e0 86 Opt_fsc, Opt_mfsymlinks,
d8162558 87 Opt_multiuser, Opt_sloppy,
8830d7e0
SP		 88
89 /* Mount options which take numeric value */
90 Opt_backupuid, Opt_backupgid, Opt_uid,
91 Opt_cruid, Opt_gid, Opt_file_mode,
92 Opt_dirmode, Opt_port,
93 Opt_rsize, Opt_wsize, Opt_actimeo,
94
95 /* Mount options which take string value */
96 Opt_user, Opt_pass, Opt_ip,
97 Opt_unc, Opt_domain,
98 Opt_srcaddr, Opt_prefixpath,
99 Opt_iocharset, Opt_sockopt,
100 Opt_netbiosname, Opt_servern,
23db65f5 101 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
8830d7e0
SP		 102
103 /* Mount options to be ignored */
104 Opt_ignore,
105
106 /* Options which could be blank */
107 Opt_blank_pass,
4fe9e963
SP		 108 Opt_blank_user,
109 Opt_blank_ip,
8830d7e0
SP		 110
111 Opt_err
112};
113
114static const match_table_t cifs_mount_option_tokens = {
115
116 { Opt_user_xattr, "user_xattr" },
117 { Opt_nouser_xattr, "nouser_xattr" },
118 { Opt_forceuid, "forceuid" },
119 { Opt_noforceuid, "noforceuid" },
120 { Opt_noblocksend, "noblocksend" },
121 { Opt_noautotune, "noautotune" },
122 { Opt_hard, "hard" },
123 { Opt_soft, "soft" },
124 { Opt_perm, "perm" },
125 { Opt_noperm, "noperm" },
126 { Opt_mapchars, "mapchars" },
127 { Opt_nomapchars, "nomapchars" },
128 { Opt_sfu, "sfu" },
129 { Opt_nosfu, "nosfu" },
130 { Opt_nodfs, "nodfs" },
131 { Opt_posixpaths, "posixpaths" },
132 { Opt_noposixpaths, "noposixpaths" },
133 { Opt_nounix, "nounix" },
134 { Opt_nounix, "nolinux" },
135 { Opt_nocase, "nocase" },
136 { Opt_nocase, "ignorecase" },
137 { Opt_brl, "brl" },
138 { Opt_nobrl, "nobrl" },
139 { Opt_nobrl, "nolock" },
140 { Opt_forcemandatorylock, "forcemandatorylock" },
5cfdddcf 141 { Opt_forcemandatorylock, "forcemand" },
8830d7e0
SP		 142 { Opt_setuids, "setuids" },
143 { Opt_nosetuids, "nosetuids" },
144 { Opt_dynperm, "dynperm" },
145 { Opt_nodynperm, "nodynperm" },
146 { Opt_nohard, "nohard" },
147 { Opt_nosoft, "nosoft" },
148 { Opt_nointr, "nointr" },
149 { Opt_intr, "intr" },
150 { Opt_nostrictsync, "nostrictsync" },
151 { Opt_strictsync, "strictsync" },
152 { Opt_serverino, "serverino" },
153 { Opt_noserverino, "noserverino" },
154 { Opt_rwpidforward, "rwpidforward" },
155 { Opt_cifsacl, "cifsacl" },
156 { Opt_nocifsacl, "nocifsacl" },
157 { Opt_acl, "acl" },
158 { Opt_noacl, "noacl" },
159 { Opt_locallease, "locallease" },
160 { Opt_sign, "sign" },
161 { Opt_seal, "seal" },
8830d7e0
SP		 162 { Opt_noac, "noac" },
163 { Opt_fsc, "fsc" },
164 { Opt_mfsymlinks, "mfsymlinks" },
165 { Opt_multiuser, "multiuser" },
d8162558 166 { Opt_sloppy, "sloppy" },
8830d7e0
SP		 167
168 { Opt_backupuid, "backupuid=%s" },
169 { Opt_backupgid, "backupgid=%s" },
170 { Opt_uid, "uid=%s" },
171 { Opt_cruid, "cruid=%s" },
172 { Opt_gid, "gid=%s" },
173 { Opt_file_mode, "file_mode=%s" },
174 { Opt_dirmode, "dirmode=%s" },
175 { Opt_dirmode, "dir_mode=%s" },
176 { Opt_port, "port=%s" },
177 { Opt_rsize, "rsize=%s" },
178 { Opt_wsize, "wsize=%s" },
179 { Opt_actimeo, "actimeo=%s" },
180
4fe9e963
SP		 181 { Opt_blank_user, "user=" },
182 { Opt_blank_user, "username=" },
8830d7e0
SP		 183 { Opt_user, "user=%s" },
184 { Opt_user, "username=%s" },
185 { Opt_blank_pass, "pass=" },
186 { Opt_pass, "pass=%s" },
187 { Opt_pass, "password=%s" },
4fe9e963
SP		 188 { Opt_blank_ip, "ip=" },
189 { Opt_blank_ip, "addr=" },
8830d7e0
SP		 190 { Opt_ip, "ip=%s" },
191 { Opt_ip, "addr=%s" },
192 { Opt_unc, "unc=%s" },
193 { Opt_unc, "target=%s" },
194 { Opt_unc, "path=%s" },
195 { Opt_domain, "dom=%s" },
196 { Opt_domain, "domain=%s" },
197 { Opt_domain, "workgroup=%s" },
198 { Opt_srcaddr, "srcaddr=%s" },
199 { Opt_prefixpath, "prefixpath=%s" },
200 { Opt_iocharset, "iocharset=%s" },
201 { Opt_sockopt, "sockopt=%s" },
202 { Opt_netbiosname, "netbiosname=%s" },
203 { Opt_servern, "servern=%s" },
204 { Opt_ver, "ver=%s" },
23db65f5 205 { Opt_vers, "vers=%s" },
8830d7e0 206 { Opt_sec, "sec=%s" },
15b6a473 207 { Opt_cache, "cache=%s" },
8830d7e0
SP		 208
209 { Opt_ignore, "cred" },
210 { Opt_ignore, "credentials" },
a557b976
JL		 211 { Opt_ignore, "cred=%s" },
212 { Opt_ignore, "credentials=%s" },
8830d7e0
SP		 213 { Opt_ignore, "guest" },
214 { Opt_ignore, "rw" },
215 { Opt_ignore, "ro" },
216 { Opt_ignore, "suid" },
217 { Opt_ignore, "nosuid" },
218 { Opt_ignore, "exec" },
219 { Opt_ignore, "noexec" },
220 { Opt_ignore, "nodev" },
221 { Opt_ignore, "noauto" },
222 { Opt_ignore, "dev" },
223 { Opt_ignore, "mand" },
224 { Opt_ignore, "nomand" },
225 { Opt_ignore, "_netdev" },
226
227 { Opt_err, NULL }
228};
229
230enum {
231 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
232 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
7659624f
JL		 233 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
234 Opt_sec_ntlmv2i, Opt_sec_lanman,
8830d7e0
SP		 235 Opt_sec_none,
236
237 Opt_sec_err
238};
239
240static const match_table_t cifs_secflavor_tokens = {
241 { Opt_sec_krb5, "krb5" },
242 { Opt_sec_krb5i, "krb5i" },
243 { Opt_sec_krb5p, "krb5p" },
244 { Opt_sec_ntlmsspi, "ntlmsspi" },
245 { Opt_sec_ntlmssp, "ntlmssp" },
246 { Opt_ntlm, "ntlm" },
247 { Opt_sec_ntlmi, "ntlmi" },
7659624f
JL		 248 { Opt_sec_ntlmv2, "nontlm" },
249 { Opt_sec_ntlmv2, "ntlmv2" },
8830d7e0 250 { Opt_sec_ntlmv2i, "ntlmv2i" },
8830d7e0
SP		 251 { Opt_sec_lanman, "lanman" },
252 { Opt_sec_none, "none" },
253
254 { Opt_sec_err, NULL }
255};
256
15b6a473
JL		 257/* cache flavors */
258enum {
259 Opt_cache_loose,
260 Opt_cache_strict,
261 Opt_cache_none,
262 Opt_cache_err
263};
264
265static const match_table_t cifs_cacheflavor_tokens = {
266 { Opt_cache_loose, "loose" },
267 { Opt_cache_strict, "strict" },
268 { Opt_cache_none, "none" },
269 { Opt_cache_err, NULL }
270};
271
23db65f5
JL		 272static const match_table_t cifs_smb_version_tokens = {
273 { Smb_1, SMB1_VERSION_STRING },
1080ef75 274 { Smb_21, SMB21_VERSION_STRING },
e4aa25e7 275 { Smb_30, SMB30_VERSION_STRING },
23db65f5
JL		 276};
277
a9f1b85e
PS		 278static int ip_connect(struct TCP_Server_Info *server);
279static int generic_ip_connect(struct TCP_Server_Info *server);
b647c35f 280static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
2de970ff 281static void cifs_prune_tlinks(struct work_struct *work);
b9bce2e9
JL		 282static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
283 const char *devname);
1da177e4 284
d5c5605c
JL		 285/*
286 * cifs tcp session reconnection
287 *
288 * mark tcp session as reconnecting so temporarily locked
289 * mark all smb sessions as reconnecting for tcp session
290 * reconnect tcp session
291 * wake up waiters on reconnection? - (not needed currently)
292 */
28ea5290 293int
1da177e4
LT		 294cifs_reconnect(struct TCP_Server_Info *server)
295{
296 int rc = 0;
f1987b44 297 struct list_head *tmp, *tmp2;
96daf2b0
SF		 298 struct cifs_ses *ses;
299 struct cifs_tcon *tcon;
fb8c4b14 300 struct mid_q_entry *mid_entry;
3c1105df 301 struct list_head retry_list;
50c2f753 302
1da177e4 303 spin_lock(&GlobalMid_Lock);
469ee614 304 if (server->tcpStatus == CifsExiting) {
fb8c4b14 305 /* the demux thread will exit normally
1da177e4
LT		 306 next time through the loop */
307 spin_unlock(&GlobalMid_Lock);
308 return rc;
309 } else
310 server->tcpStatus = CifsNeedReconnect;
311 spin_unlock(&GlobalMid_Lock);
312 server->maxBuf = 0;
aa24d1e9
PS		 313#ifdef CONFIG_CIFS_SMB2
314 server->max_read = 0;
315#endif
1da177e4 316
b6b38f70 317 cFYI(1, "Reconnecting tcp session");
1da177e4
LT		 318
319 /* before reconnecting the tcp session, mark the smb session (uid)
320 and the tid bad so they are not used until reconnected */
2b84a36c 321 cFYI(1, "%s: marking sessions and tcons for reconnect", __func__);
3f9bcca7 322 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 323 list_for_each(tmp, &server->smb_ses_list) {
96daf2b0 324 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
14fbf50d
JL		 325 ses->need_reconnect = true;
326 ses->ipc_tid = 0;
f1987b44 327 list_for_each(tmp2, &ses->tcon_list) {
96daf2b0 328 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
3b795210 329 tcon->need_reconnect = true;
1da177e4 330 }
1da177e4 331 }
3f9bcca7 332 spin_unlock(&cifs_tcp_ses_lock);
2b84a36c 333
1da177e4 334 /* do not want to be sending data on a socket we are freeing */
2b84a36c 335 cFYI(1, "%s: tearing down socket", __func__);
72ca545b 336 mutex_lock(&server->srv_mutex);
fb8c4b14 337 if (server->ssocket) {
b6b38f70
JP		 338 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
339 server->ssocket->flags);
91cf45f0 340 kernel_sock_shutdown(server->ssocket, SHUT_WR);
b6b38f70 341 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
467a8f8d 342 server->ssocket->state,
b6b38f70 343 server->ssocket->flags);
1da177e4
LT		 344 sock_release(server->ssocket);
345 server->ssocket = NULL;
346 }
5d0d2882
SP		 347 server->sequence_number = 0;
348 server->session_estab = false;
21e73393
SP		 349 kfree(server->session_key.response);
350 server->session_key.response = NULL;
351 server->session_key.len = 0;
fda35943 352 server->lstrp = jiffies;
2b84a36c 353 mutex_unlock(&server->srv_mutex);
1da177e4 354
2b84a36c 355 /* mark submitted MIDs for retry and issue callback */
3c1105df
JL		 356 INIT_LIST_HEAD(&retry_list);
357 cFYI(1, "%s: moving mids to private list", __func__);
1da177e4 358 spin_lock(&GlobalMid_Lock);
2b84a36c
JL		 359 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
360 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1
PS		 361 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
362 mid_entry->mid_state = MID_RETRY_NEEDED;
3c1105df
JL		 363 list_move(&mid_entry->qhead, &retry_list);
364 }
365 spin_unlock(&GlobalMid_Lock);
366
367 cFYI(1, "%s: issuing mid callbacks", __func__);
368 list_for_each_safe(tmp, tmp2, &retry_list) {
369 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
2b84a36c
JL		 370 list_del_init(&mid_entry->qhead);
371 mid_entry->callback(mid_entry);
1da177e4 372 }
1da177e4 373
7fdbaa1b 374 do {
6c3d8909 375 try_to_freeze();
a9f1b85e
PS		 376
377 /* we should try only the port we connected to before */
378 rc = generic_ip_connect(server);
fb8c4b14 379 if (rc) {
b6b38f70 380 cFYI(1, "reconnect error %d", rc);
0cb766ae 381 msleep(3000);
1da177e4
LT		 382 } else {
383 atomic_inc(&tcpSesReconnectCount);
384 spin_lock(&GlobalMid_Lock);
469ee614 385 if (server->tcpStatus != CifsExiting)
fd88ce93 386 server->tcpStatus = CifsNeedNegotiate;
fb8c4b14 387 spin_unlock(&GlobalMid_Lock);
1da177e4 388 }
7fdbaa1b 389 } while (server->tcpStatus == CifsNeedReconnect);
2b84a36c 390
1da177e4
LT		 391 return rc;
392}
393
c74093b6
JL		 394static void
395cifs_echo_request(struct work_struct *work)
396{
397 int rc;
398 struct TCP_Server_Info *server = container_of(work,
399 struct TCP_Server_Info, echo.work);
400
247ec9b4 401 /*
f6d76178
PS		 402 * We cannot send an echo if it is disabled or until the
403 * NEGOTIATE_PROTOCOL request is done, which is indicated by
404 * server->ops->need_neg() == true. Also, no need to ping if
405 * we got a response recently.
247ec9b4 406 */
286170aa 407 if (!server->ops->need_neg || server->ops->need_neg(server) ||
f6d76178 408 (server->ops->can_echo && !server->ops->can_echo(server)) ||
247ec9b4 409 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
c74093b6
JL		 410 goto requeue_echo;
411
f6d76178 412 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
c74093b6
JL		 413 if (rc)
414 cFYI(1, "Unable to send echo request to server: %s",
415 server->hostname);
416
417requeue_echo:
da472fc8 418 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
c74093b6
JL		 419}
420
3d9c2472 421static bool
2a37ef94 422allocate_buffers(struct TCP_Server_Info *server)
3d9c2472 423{
2a37ef94
JL		 424 if (!server->bigbuf) {
425 server->bigbuf = (char *)cifs_buf_get();
426 if (!server->bigbuf) {
3d9c2472
PS		 427 cERROR(1, "No memory for large SMB response");
428 msleep(3000);
429 /* retry will check if exiting */
430 return false;
431 }
2a37ef94 432 } else if (server->large_buf) {
3d9c2472 433 /* we are reusing a dirty large buf, clear its start */
1887f601 434 memset(server->bigbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 435 }
436
2a37ef94
JL		 437 if (!server->smallbuf) {
438 server->smallbuf = (char *)cifs_small_buf_get();
439 if (!server->smallbuf) {
3d9c2472
PS		 440 cERROR(1, "No memory for SMB response");
441 msleep(1000);
442 /* retry will check if exiting */
443 return false;
444 }
445 /* beginning of smb buffer is cleared in our buf_get */
446 } else {
447 /* if existing small buf clear beginning */
1887f601 448 memset(server->smallbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 449 }
450
3d9c2472
PS		 451 return true;
452}
453
ba749e6d
JL		 454static bool
455server_unresponsive(struct TCP_Server_Info *server)
456{
6dae51a5
PS		 457 /*
458 * We need to wait 2 echo intervals to make sure we handle such
459 * situations right:
460 * 1s client sends a normal SMB request
461 * 2s client gets a response
462 * 30s echo workqueue job pops, and decides we got a response recently
463 * and don't need to send another
464 * ...
465 * 65s kernel_recvmsg times out, and we see that we haven't gotten
466 * a response in >60s.
467 */
468 if (server->tcpStatus == CifsGood &&
469 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
ba749e6d
JL		 470 cERROR(1, "Server %s has not responded in %d seconds. "
471 "Reconnecting...", server->hostname,
6dae51a5 472 (2 * SMB_ECHO_INTERVAL) / HZ);
ba749e6d
JL		 473 cifs_reconnect(server);
474 wake_up(&server->response_q);
475 return true;
476 }
477
478 return false;
479}
480
42c4dfc2
JL		 481/*
482 * kvec_array_init - clone a kvec array, and advance into it
483 * @new: pointer to memory for cloned array
484 * @iov: pointer to original array
485 * @nr_segs: number of members in original array
486 * @bytes: number of bytes to advance into the cloned array
487 *
488 * This function will copy the array provided in iov to a section of memory
489 * and advance the specified number of bytes into the new array. It returns
490 * the number of segments in the new array. "new" must be at least as big as
491 * the original iov array.
492 */
493static unsigned int
494kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
495 size_t bytes)
496{
497 size_t base = 0;
498
499 while (bytes || !iov->iov_len) {
500 int copy = min(bytes, iov->iov_len);
501
502 bytes -= copy;
503 base += copy;
504 if (iov->iov_len == base) {
505 iov++;
506 nr_segs--;
507 base = 0;
508 }
509 }
510 memcpy(new, iov, sizeof(*iov) * nr_segs);
511 new->iov_base += base;
512 new->iov_len -= base;
513 return nr_segs;
514}
515
1041e3f9
JL		 516static struct kvec *
517get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
e7015fb1 518{
1041e3f9
JL		 519 struct kvec *new_iov;
520
521 if (server->iov && nr_segs <= server->nr_iov)
522 return server->iov;
523
524 /* not big enough -- allocate a new one and release the old */
525 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
526 if (new_iov) {
527 kfree(server->iov);
528 server->iov = new_iov;
529 server->nr_iov = nr_segs;
530 }
531 return new_iov;
532}
533
e28bc5b1
JL		 534int
535cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
536 unsigned int nr_segs, unsigned int to_read)
e7015fb1 537{
a52c1eb7
JL		 538 int length = 0;
539 int total_read;
42c4dfc2 540 unsigned int segs;
e831e6cf 541 struct msghdr smb_msg;
42c4dfc2
JL		 542 struct kvec *iov;
543
1041e3f9 544 iov = get_server_iovec(server, nr_segs);
42c4dfc2
JL		 545 if (!iov)
546 return -ENOMEM;
e7015fb1 547
e831e6cf
JL		 548 smb_msg.msg_control = NULL;
549 smb_msg.msg_controllen = 0;
550
a52c1eb7 551 for (total_read = 0; to_read; total_read += length, to_read -= length) {
95edcff4
JL		 552 try_to_freeze();
553
ba749e6d 554 if (server_unresponsive(server)) {
a52c1eb7 555 total_read = -EAGAIN;
ba749e6d
JL		 556 break;
557 }
558
42c4dfc2
JL		 559 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
560
561 length = kernel_recvmsg(server->ssocket, &smb_msg,
562 iov, segs, to_read, 0);
e7015fb1 563
e7015fb1 564 if (server->tcpStatus == CifsExiting) {
a52c1eb7 565 total_read = -ESHUTDOWN;
e7015fb1
PS		 566 break;
567 } else if (server->tcpStatus == CifsNeedReconnect) {
568 cifs_reconnect(server);
a52c1eb7 569 total_read = -EAGAIN;
e7015fb1
PS		 570 break;
571 } else if (length == -ERESTARTSYS ||
572 length == -EAGAIN ||
573 length == -EINTR) {
574 /*
575 * Minimum sleep to prevent looping, allowing socket
576 * to clear and app threads to set tcpStatus
577 * CifsNeedReconnect if server hung.
578 */
579 usleep_range(1000, 2000);
580 length = 0;
a52c1eb7 581 continue;
e7015fb1 582 } else if (length <= 0) {
a52c1eb7
JL		 583 cFYI(1, "Received no data or error: expecting %d "
584 "got %d", to_read, length);
e7015fb1 585 cifs_reconnect(server);
a52c1eb7 586 total_read = -EAGAIN;
e7015fb1
PS		 587 break;
588 }
589 }
a52c1eb7 590 return total_read;
e7015fb1 591}
e7015fb1 592
e28bc5b1
JL		 593int
594cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
595 unsigned int to_read)
42c4dfc2
JL		 596{
597 struct kvec iov;
598
599 iov.iov_base = buf;
600 iov.iov_len = to_read;
601
e28bc5b1 602 return cifs_readv_from_socket(server, &iov, 1, to_read);
e7015fb1
PS		 603}
604
98bac62c 605static bool
fe11e4cc 606is_smb_response(struct TCP_Server_Info *server, unsigned char type)
98bac62c 607{
98bac62c
PS		 608 /*
609 * The first byte big endian of the length field,
610 * is actually not part of the length but the type
611 * with the most common, zero, as regular data.
612 */
fe11e4cc
JL		 613 switch (type) {
614 case RFC1002_SESSION_MESSAGE:
615 /* Regular SMB response */
616 return true;
617 case RFC1002_SESSION_KEEP_ALIVE:
618 cFYI(1, "RFC 1002 session keep alive");
619 break;
620 case RFC1002_POSITIVE_SESSION_RESPONSE:
621 cFYI(1, "RFC 1002 positive session response");
622 break;
623 case RFC1002_NEGATIVE_SESSION_RESPONSE:
98bac62c
PS		 624 /*
625 * We get this from Windows 98 instead of an error on
626 * SMB negprot response.
627 */
fe11e4cc 628 cFYI(1, "RFC 1002 negative session response");
98bac62c
PS		 629 /* give server a second to clean up */
630 msleep(1000);
631 /*
632 * Always try 445 first on reconnect since we get NACK
633 * on some if we ever connected to port 139 (the NACK
634 * is since we do not begin with RFC1001 session
635 * initialize frame).
636 */
fe11e4cc 637 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
98bac62c
PS		 638 cifs_reconnect(server);
639 wake_up(&server->response_q);
fe11e4cc
JL		 640 break;
641 default:
642 cERROR(1, "RFC 1002 unknown response type 0x%x", type);
98bac62c 643 cifs_reconnect(server);
98bac62c
PS		 644 }
645
fe11e4cc 646 return false;
98bac62c
PS		 647}
648
e28bc5b1
JL		 649void
650dequeue_mid(struct mid_q_entry *mid, bool malformed)
ea1f4502 651{
ad69bae1 652#ifdef CONFIG_CIFS_STATS2
ea1f4502 653 mid->when_received = jiffies;
ad69bae1 654#endif
ea1f4502
JL		 655 spin_lock(&GlobalMid_Lock);
656 if (!malformed)
7c9421e1 657 mid->mid_state = MID_RESPONSE_RECEIVED;
ea1f4502 658 else
7c9421e1 659 mid->mid_state = MID_RESPONSE_MALFORMED;
ea1f4502 660 list_del_init(&mid->qhead);
ad69bae1 661 spin_unlock(&GlobalMid_Lock);
ea1f4502 662}
ad69bae1 663
c8054ebd
JL		 664static void
665handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
d4e4854f 666 char *buf, int malformed)
ea1f4502 667{
316cf94a
PS		 668 if (server->ops->check_trans2 &&
669 server->ops->check_trans2(mid, server, buf, malformed))
c8054ebd 670 return;
ea1f4502 671 mid->resp_buf = buf;
7c9421e1 672 mid->large_buf = server->large_buf;
2a37ef94
JL		 673 /* Was previous buf put in mpx struct for multi-rsp? */
674 if (!mid->multiRsp) {
675 /* smb buffer will be freed by user thread */
676 if (server->large_buf)
677 server->bigbuf = NULL;
678 else
679 server->smallbuf = NULL;
680 }
ffc00e27 681 dequeue_mid(mid, malformed);
ad69bae1
PS		 682}
683
762dfd10
PS		 684static void clean_demultiplex_info(struct TCP_Server_Info *server)
685{
686 int length;
687
688 /* take it off the list, if it's not already */
689 spin_lock(&cifs_tcp_ses_lock);
690 list_del_init(&server->tcp_ses_list);
691 spin_unlock(&cifs_tcp_ses_lock);
692
693 spin_lock(&GlobalMid_Lock);
694 server->tcpStatus = CifsExiting;
695 spin_unlock(&GlobalMid_Lock);
696 wake_up_all(&server->response_q);
697
2d86dbc9 698 /* check if we have blocked requests that need to free */
fc40f9cf 699 spin_lock(&server->req_lock);
2d86dbc9
PS		 700 if (server->credits <= 0)
701 server->credits = 1;
fc40f9cf 702 spin_unlock(&server->req_lock);
762dfd10
PS		 703 /*
704 * Although there should not be any requests blocked on this queue it
705 * can not hurt to be paranoid and try to wake up requests that may
706 * haven been blocked when more than 50 at time were on the wire to the
707 * same server - they now will see the session is in exit state and get
708 * out of SendReceive.
709 */
710 wake_up_all(&server->request_q);
711 /* give those requests time to exit */
712 msleep(125);
713
714 if (server->ssocket) {
715 sock_release(server->ssocket);
716 server->ssocket = NULL;
717 }
718
719 if (!list_empty(&server->pending_mid_q)) {
720 struct list_head dispose_list;
721 struct mid_q_entry *mid_entry;
722 struct list_head *tmp, *tmp2;
723
724 INIT_LIST_HEAD(&dispose_list);
725 spin_lock(&GlobalMid_Lock);
726 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
727 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1
PS		 728 cFYI(1, "Clearing mid 0x%llx", mid_entry->mid);
729 mid_entry->mid_state = MID_SHUTDOWN;
762dfd10
PS		 730 list_move(&mid_entry->qhead, &dispose_list);
731 }
732 spin_unlock(&GlobalMid_Lock);
733
734 /* now walk dispose list and issue callbacks */
735 list_for_each_safe(tmp, tmp2, &dispose_list) {
736 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1 737 cFYI(1, "Callback mid 0x%llx", mid_entry->mid);
762dfd10
PS		 738 list_del_init(&mid_entry->qhead);
739 mid_entry->callback(mid_entry);
740 }
741 /* 1/8th of sec is more than enough time for them to exit */
742 msleep(125);
743 }
744
745 if (!list_empty(&server->pending_mid_q)) {
746 /*
747 * mpx threads have not exited yet give them at least the smb
748 * send timeout time for long ops.
749 *
750 * Due to delays on oplock break requests, we need to wait at
751 * least 45 seconds before giving up on a request getting a
752 * response and going ahead and killing cifsd.
753 */
754 cFYI(1, "Wait for exit from demultiplex thread");
755 msleep(46000);
756 /*
757 * If threads still have not exited they are probably never
758 * coming home not much else we can do but free the memory.
759 */
760 }
761
762 kfree(server->hostname);
1041e3f9 763 kfree(server->iov);
762dfd10
PS		 764 kfree(server);
765
766 length = atomic_dec_return(&tcpSesAllocCount);
767 if (length > 0)
768 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
769 GFP_KERNEL);
770}
771
e9097ab4
JL		 772static int
773standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
774{
775 int length;
776 char *buf = server->smallbuf;
d4e4854f 777 unsigned int pdu_length = get_rfc1002_length(buf);
e9097ab4
JL		 778
779 /* make sure this will fit in a large buffer */
1887f601 780 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
e9097ab4
JL		 781 cERROR(1, "SMB response too long (%u bytes)",
782 pdu_length);
783 cifs_reconnect(server);
784 wake_up(&server->response_q);
785 return -EAGAIN;
786 }
787
788 /* switch to large buffer if too big for a small one */
789 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
790 server->large_buf = true;
d4e4854f 791 memcpy(server->bigbuf, buf, server->total_read);
e9097ab4 792 buf = server->bigbuf;
e9097ab4
JL		 793 }
794
795 /* now read the rest */
1887f601
PS		 796 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
797 pdu_length - HEADER_SIZE(server) + 1 + 4);
e9097ab4
JL		 798 if (length < 0)
799 return length;
800 server->total_read += length;
801
d4e4854f 802 dump_smb(buf, server->total_read);
e9097ab4
JL		 803
804 /*
805 * We know that we received enough to get to the MID as we
806 * checked the pdu_length earlier. Now check to see
807 * if the rest of the header is OK. We borrow the length
808 * var for the rest of the loop to avoid a new stack var.
809 *
810 * 48 bytes is enough to display the header and a little bit
811 * into the payload for debugging purposes.
812 */
8aa26f3e 813 length = server->ops->check_message(buf, server->total_read);
e9097ab4
JL		 814 if (length != 0)
815 cifs_dump_mem("Bad SMB: ", buf,
816 min_t(unsigned int, server->total_read, 48));
817
2e44b288
PS		 818 if (server->ops->is_status_pending &&
819 server->ops->is_status_pending(buf, server, length))
820 return -1;
821
ff4fa4a2
JL		 822 if (!mid)
823 return length;
e9097ab4 824
d4e4854f 825 handle_mid(mid, server, buf, length);
ff4fa4a2 826 return 0;
e9097ab4
JL		 827}
828
1da177e4 829static int
7c97c200 830cifs_demultiplex_thread(void *p)
1da177e4
LT		 831{
832 int length;
7c97c200 833 struct TCP_Server_Info *server = p;
2a37ef94
JL		 834 unsigned int pdu_length;
835 char *buf = NULL;
1da177e4
LT		 836 struct task_struct *task_to_wake = NULL;
837 struct mid_q_entry *mid_entry;
1da177e4 838
1da177e4 839 current->flags |= PF_MEMALLOC;
b6b38f70 840 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
93d0ec85
JL		 841
842 length = atomic_inc_return(&tcpSesAllocCount);
843 if (length > 1)
26f57364
SF		 844 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
845 GFP_KERNEL);
1da177e4 846
83144186 847 set_freezable();
469ee614 848 while (server->tcpStatus != CifsExiting) {
ede1327e
SF		 849 if (try_to_freeze())
850 continue;
b8643e1b 851
2a37ef94 852 if (!allocate_buffers(server))
3d9c2472 853 continue;
b8643e1b 854
2a37ef94 855 server->large_buf = false;
2a37ef94 856 buf = server->smallbuf;
f01d5e14 857 pdu_length = 4; /* enough to get RFC1001 header */
fda35943 858
e28bc5b1 859 length = cifs_read_from_socket(server, buf, pdu_length);
a52c1eb7 860 if (length < 0)
1da177e4 861 continue;
2a37ef94 862 server->total_read = length;
1da177e4 863
98bac62c
PS		 864 /*
865 * The right amount was read from socket - 4 bytes,
866 * so we can now interpret the length field.
867 */
d4e4854f 868 pdu_length = get_rfc1002_length(buf);
70ca734a 869
fe11e4cc
JL		 870 cFYI(1, "RFC1002 header 0x%x", pdu_length);
871 if (!is_smb_response(server, buf[0]))
fb8c4b14 872 continue;
e4eb295d 873
89482a56 874 /* make sure we have enough to get to the MID */
1887f601 875 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
89482a56
JL		 876 cERROR(1, "SMB response too short (%u bytes)",
877 pdu_length);
878 cifs_reconnect(server);
879 wake_up(&server->response_q);
880 continue;
e4eb295d 881 }
e7015fb1 882
89482a56 883 /* read down to the MID */
e28bc5b1 884 length = cifs_read_from_socket(server, buf + 4,
1887f601 885 HEADER_SIZE(server) - 1 - 4);
89482a56 886 if (length < 0)
e4eb295d 887 continue;
2a37ef94 888 server->total_read += length;
1da177e4 889
8aa26f3e 890 mid_entry = server->ops->find_mid(server, buf);
50c2f753 891
44d22d84
JL		 892 if (!mid_entry || !mid_entry->receive)
893 length = standard_receive3(server, mid_entry);
894 else
895 length = mid_entry->receive(server, mid_entry);
71823baf 896
e9097ab4 897 if (length < 0)
fe11e4cc 898 continue;
1da177e4 899
d4e4854f 900 if (server->large_buf)
2a37ef94 901 buf = server->bigbuf;
fda35943 902
fda35943 903 server->lstrp = jiffies;
2b84a36c 904 if (mid_entry != NULL) {
2a37ef94
JL		 905 if (!mid_entry->multiRsp || mid_entry->multiEnd)
906 mid_entry->callback(mid_entry);
7f0adb53
PS		 907 } else if (!server->ops->is_oplock_break ||
908 !server->ops->is_oplock_break(buf, server)) {
b6b38f70 909 cERROR(1, "No task to wake, unknown frame received! "
8097531a 910 "NumMids %d", atomic_read(&midCount));
1887f601
PS		 911 cifs_dump_mem("Received Data is: ", buf,
912 HEADER_SIZE(server));
3979877e 913#ifdef CONFIG_CIFS_DEBUG2
7f0adb53
PS		 914 if (server->ops->dump_detail)
915 server->ops->dump_detail(buf);
3979877e
SF		 916 cifs_dump_mids(server);
917#endif /* CIFS_DEBUG2 */
50c2f753 918
e4eb295d
SF		 919 }
920 } /* end while !EXITING */
921
fd62cb7e 922 /* buffer usually freed in free_mid - need to free it here on exit */
2a37ef94
JL		 923 cifs_buf_release(server->bigbuf);
924 if (server->smallbuf) /* no sense logging a debug message if NULL */
925 cifs_small_buf_release(server->smallbuf);
1da177e4 926
b1c8d2b4 927 task_to_wake = xchg(&server->tsk, NULL);
762dfd10 928 clean_demultiplex_info(server);
50c2f753 929
b1c8d2b4
JL		 930 /* if server->tsk was NULL then wait for a signal before exiting */
931 if (!task_to_wake) {
932 set_current_state(TASK_INTERRUPTIBLE);
933 while (!signal_pending(current)) {
934 schedule();
935 set_current_state(TASK_INTERRUPTIBLE);
936 }
937 set_current_state(TASK_RUNNING);
938 }
939
0468a2cf 940 module_put_and_exit(0);
1da177e4
LT		 941}
942
c359cf3c
JL		 943/* extract the host portion of the UNC string */
944static char *
945extract_hostname(const char *unc)
946{
947 const char *src;
948 char *dst, *delim;
949 unsigned int len;
950
951 /* skip double chars at beginning of string */
952 /* BB: check validity of these bytes? */
953 src = unc + 2;
954
955 /* delimiter between hostname and sharename is always '\\' now */
956 delim = strchr(src, '\\');
957 if (!delim)
958 return ERR_PTR(-EINVAL);
959
960 len = delim - src;
961 dst = kmalloc((len + 1), GFP_KERNEL);
962 if (dst == NULL)
963 return ERR_PTR(-ENOMEM);
964
965 memcpy(dst, src, len);
966 dst[len] = '\0';
967
968 return dst;
969}
970
8830d7e0
SP		 971static int get_option_ul(substring_t args[], unsigned long *option)
972{
973 int rc;
974 char *string;
975
976 string = match_strdup(args);
977 if (string == NULL)
978 return -ENOMEM;
bfa890a3 979 rc = kstrtoul(string, 0, option);
8830d7e0
SP		 980 kfree(string);
981
982 return rc;
983}
984
985
986static int cifs_parse_security_flavors(char *value,
987 struct smb_vol *vol)
988{
989
990 substring_t args[MAX_OPT_ARGS];
991
992 switch (match_token(value, cifs_secflavor_tokens, args)) {
993 case Opt_sec_krb5:
994 vol->secFlg |= CIFSSEC_MAY_KRB5;
995 break;
996 case Opt_sec_krb5i:
997 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN;
998 break;
999 case Opt_sec_krb5p:
1000 /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */
1001 cERROR(1, "Krb5 cifs privacy not supported");
1002 break;
1003 case Opt_sec_ntlmssp:
1004 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
1005 break;
1006 case Opt_sec_ntlmsspi:
1007 vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN;
1008 break;
1009 case Opt_ntlm:
1010 /* ntlm is default so can be turned off too */
1011 vol->secFlg |= CIFSSEC_MAY_NTLM;
1012 break;
1013 case Opt_sec_ntlmi:
1014 vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN;
1015 break;
7659624f 1016 case Opt_sec_ntlmv2:
8830d7e0
SP		 1017 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1018 break;
1019 case Opt_sec_ntlmv2i:
1020 vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN;
1021 break;
1022#ifdef CONFIG_CIFS_WEAK_PW_HASH
1023 case Opt_sec_lanman:
1024 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1025 break;
1026#endif
1027 case Opt_sec_none:
1028 vol->nullauth = 1;
1029 break;
1030 default:
1031 cERROR(1, "bad security option: %s", value);
1032 return 1;
1033 }
1034
1035 return 0;
1036}
1037
15b6a473
JL		 1038static int
1039cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1040{
1041 substring_t args[MAX_OPT_ARGS];
1042
1043 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1044 case Opt_cache_loose:
1045 vol->direct_io = false;
1046 vol->strict_io = false;
1047 break;
1048 case Opt_cache_strict:
1049 vol->direct_io = false;
1050 vol->strict_io = true;
1051 break;
1052 case Opt_cache_none:
1053 vol->direct_io = true;
1054 vol->strict_io = false;
1055 break;
1056 default:
1057 cERROR(1, "bad cache= option: %s", value);
1058 return 1;
1059 }
1060 return 0;
1061}
1062
23db65f5
JL		 1063static int
1064cifs_parse_smb_version(char *value, struct smb_vol *vol)
1065{
1066 substring_t args[MAX_OPT_ARGS];
1067
1068 switch (match_token(value, cifs_smb_version_tokens, args)) {
1069 case Smb_1:
1070 vol->ops = &smb1_operations;
1071 vol->vals = &smb1_values;
1072 break;
1080ef75
SF		 1073#ifdef CONFIG_CIFS_SMB2
1074 case Smb_21:
1075 vol->ops = &smb21_operations;
1076 vol->vals = &smb21_values;
1077 break;
e4aa25e7
SF		 1078 case Smb_30:
1079 vol->ops = &smb21_operations; /* currently identical with 2.1 */
1080 vol->vals = &smb30_values;
1081 break;
1080ef75 1082#endif
23db65f5
JL		 1083 default:
1084 cERROR(1, "Unknown vers= option specified: %s", value);
1085 return 1;
1086 }
1087 return 0;
1088}
1089
1da177e4 1090static int
b946845a 1091cifs_parse_mount_options(const char *mountdata, const char *devname,
50c2f753 1092 struct smb_vol *vol)
1da177e4 1093{
8830d7e0 1094 char *data, *end;
957df453 1095 char *mountdata_copy = NULL, *options;
1da177e4
LT		 1096 unsigned int temp_len, i, j;
1097 char separator[2];
9b9d6b24
JL		 1098 short int override_uid = -1;
1099 short int override_gid = -1;
1100 bool uid_specified = false;
1101 bool gid_specified = false;
d8162558
JL		 1102 bool sloppy = false;
1103 char *invalid = NULL;
88463999 1104 char *nodename = utsname()->nodename;
8830d7e0
SP		 1105 char *string = NULL;
1106 char *tmp_end, *value;
1107 char delim;
1da177e4
LT		 1108
1109 separator[0] = ',';
50c2f753 1110 separator[1] = 0;
8830d7e0 1111 delim = separator[0];
1da177e4 1112
88463999
JL		 1113 /*
1114 * does not have to be perfect mapping since field is
1115 * informational, only used for servers that do not support
1116 * port 445 and it can be overridden at mount time
1117 */
1397f2ee
JL		 1118 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1119 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
88463999
JL		 1120 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1121
1397f2ee 1122 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
a10faeb2
SF		 1123 /* null target name indicates to use *SMBSERVR default called name
1124 if we end up sending RFC1001 session initialize */
1125 vol->target_rfc1001_name[0] = 0;
3e4b3e1f
JL		 1126 vol->cred_uid = current_uid();
1127 vol->linux_uid = current_uid();
a001e5b5 1128 vol->linux_gid = current_gid();
f55ed1a8
JL		 1129
1130 /* default to only allowing write access to owner of the mount */
1131 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1da177e4
LT		 1132
1133 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
ac67055e
JA		 1134 /* default is always to request posix paths. */
1135 vol->posix_paths = 1;
a0c9217f
JL		 1136 /* default to using server inode numbers where available */
1137 vol->server_ino = 1;
ac67055e 1138
1b359204
JL		 1139 /* default is to use strict cifs caching semantics */
1140 vol->strict_io = true;
1141
6d20e840
SJ		 1142 vol->actimeo = CIFS_DEF_ACTIMEO;
1143
23db65f5
JL		 1144 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1145 vol->ops = &smb1_operations;
1146 vol->vals = &smb1_values;
1147
b946845a
SF		 1148 if (!mountdata)
1149 goto cifs_parse_mount_err;
1150
1151 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1152 if (!mountdata_copy)
1153 goto cifs_parse_mount_err;
1da177e4 1154
b946845a 1155 options = mountdata_copy;
4906e50b 1156 end = options + strlen(options);
8830d7e0 1157
50c2f753 1158 if (strncmp(options, "sep=", 4) == 0) {
fb8c4b14 1159 if (options[4] != 0) {
1da177e4
LT		 1160 separator[0] = options[4];
1161 options += 5;
1162 } else {
b6b38f70 1163 cFYI(1, "Null separator not allowed");
1da177e4
LT		 1164 }
1165 }
3d3ea8e6
SP		 1166 vol->backupuid_specified = false; /* no backup intent for a user */
1167 vol->backupgid_specified = false; /* no backup intent for a group */
50c2f753 1168
1da177e4 1169 while ((data = strsep(&options, separator)) != NULL) {
8830d7e0
SP		 1170 substring_t args[MAX_OPT_ARGS];
1171 unsigned long option;
1172 int token;
1173
1da177e4
LT		 1174 if (!*data)
1175 continue;
1da177e4 1176
8830d7e0
SP		 1177 token = match_token(data, cifs_mount_option_tokens, args);
1178
1179 switch (token) {
1180
1181 /* Ingnore the following */
1182 case Opt_ignore:
1183 break;
1184
1185 /* Boolean values */
1186 case Opt_user_xattr:
1da177e4 1187 vol->no_xattr = 0;
8830d7e0
SP		 1188 break;
1189 case Opt_nouser_xattr:
1da177e4 1190 vol->no_xattr = 1;
8830d7e0
SP		 1191 break;
1192 case Opt_forceuid:
9b9d6b24 1193 override_uid = 1;
8830d7e0
SP		 1194 break;
1195 case Opt_noforceuid:
9b9d6b24 1196 override_uid = 0;
8830d7e0
SP		 1197 break;
1198 case Opt_noblocksend:
edf1ae40 1199 vol->noblocksnd = 1;
8830d7e0
SP		 1200 break;
1201 case Opt_noautotune:
edf1ae40 1202 vol->noautotune = 1;
8830d7e0
SP		 1203 break;
1204 case Opt_hard:
1da177e4 1205 vol->retry = 1;
8830d7e0
SP		 1206 break;
1207 case Opt_soft:
1da177e4 1208 vol->retry = 0;
8830d7e0
SP		 1209 break;
1210 case Opt_perm:
1da177e4 1211 vol->noperm = 0;
8830d7e0
SP		 1212 break;
1213 case Opt_noperm:
1da177e4 1214 vol->noperm = 1;
8830d7e0
SP		 1215 break;
1216 case Opt_mapchars:
6a0b4824 1217 vol->remap = 1;
8830d7e0
SP		 1218 break;
1219 case Opt_nomapchars:
6a0b4824 1220 vol->remap = 0;
8830d7e0
SP		 1221 break;
1222 case Opt_sfu:
50c2f753 1223 vol->sfu_emul = 1;
8830d7e0
SP		 1224 break;
1225 case Opt_nosfu:
50c2f753 1226 vol->sfu_emul = 0;
8830d7e0
SP		 1227 break;
1228 case Opt_nodfs:
2c1b8615 1229 vol->nodfs = 1;
8830d7e0
SP		 1230 break;
1231 case Opt_posixpaths:
ac67055e 1232 vol->posix_paths = 1;
8830d7e0
SP		 1233 break;
1234 case Opt_noposixpaths:
ac67055e 1235 vol->posix_paths = 0;
8830d7e0
SP		 1236 break;
1237 case Opt_nounix:
c18c842b 1238 vol->no_linux_ext = 1;
8830d7e0
SP		 1239 break;
1240 case Opt_nocase:
50c2f753 1241 vol->nocase = 1;
8830d7e0
SP		 1242 break;
1243 case Opt_brl:
c46fa8ac 1244 vol->nobrl = 0;
8830d7e0
SP		 1245 break;
1246 case Opt_nobrl:
c46fa8ac 1247 vol->nobrl = 1;
5cfdddcf
PS		 1248 /*
1249 * turn off mandatory locking in mode
8830d7e0 1250 * if remote locking is turned off since the
5cfdddcf
PS		 1251 * local vfs will do advisory
1252 */
50c2f753
SF		 1253 if (vol->file_mode ==
1254 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
d3485d37 1255 vol->file_mode = S_IALLUGO;
8830d7e0
SP		 1256 break;
1257 case Opt_forcemandatorylock:
13a6e42a 1258 vol->mand_lock = 1;
8830d7e0
SP		 1259 break;
1260 case Opt_setuids:
1da177e4 1261 vol->setuids = 1;
8830d7e0
SP		 1262 break;
1263 case Opt_nosetuids:
1da177e4 1264 vol->setuids = 0;
8830d7e0
SP		 1265 break;
1266 case Opt_dynperm:
d0a9c078 1267 vol->dynperm = true;
8830d7e0
SP		 1268 break;
1269 case Opt_nodynperm:
d0a9c078 1270 vol->dynperm = false;
8830d7e0
SP		 1271 break;
1272 case Opt_nohard:
1da177e4 1273 vol->retry = 0;
8830d7e0
SP		 1274 break;
1275 case Opt_nosoft:
1da177e4 1276 vol->retry = 1;
8830d7e0
SP		 1277 break;
1278 case Opt_nointr:
1da177e4 1279 vol->intr = 0;
8830d7e0
SP		 1280 break;
1281 case Opt_intr:
1da177e4 1282 vol->intr = 1;
8830d7e0
SP		 1283 break;
1284 case Opt_nostrictsync:
be652445 1285 vol->nostrictsync = 1;
8830d7e0
SP		 1286 break;
1287 case Opt_strictsync:
be652445 1288 vol->nostrictsync = 0;
8830d7e0
SP		 1289 break;
1290 case Opt_serverino:
1da177e4 1291 vol->server_ino = 1;
8830d7e0
SP		 1292 break;
1293 case Opt_noserverino:
1da177e4 1294 vol->server_ino = 0;
8830d7e0
SP		 1295 break;
1296 case Opt_rwpidforward:
d4ffff1f 1297 vol->rwpidforward = 1;
8830d7e0
SP		 1298 break;
1299 case Opt_cifsacl:
0a4b92c0 1300 vol->cifs_acl = 1;
8830d7e0
SP		 1301 break;
1302 case Opt_nocifsacl:
0a4b92c0 1303 vol->cifs_acl = 0;
8830d7e0
SP		 1304 break;
1305 case Opt_acl:
1da177e4 1306 vol->no_psx_acl = 0;
8830d7e0
SP		 1307 break;
1308 case Opt_noacl:
1da177e4 1309 vol->no_psx_acl = 1;
8830d7e0
SP		 1310 break;
1311 case Opt_locallease:
84210e91 1312 vol->local_lease = 1;
8830d7e0
SP		 1313 break;
1314 case Opt_sign:
750d1151 1315 vol->secFlg |= CIFSSEC_MUST_SIGN;
8830d7e0
SP		 1316 break;
1317 case Opt_seal:
95b1cb90 1318 /* we do not do the following in secFlags because seal
8830d7e0
SP		 1319 * is a per tree connection (mount) not a per socket
1320 * or per-smb connection option in the protocol
1321 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1322 */
95b1cb90 1323 vol->seal = 1;
8830d7e0 1324 break;
8830d7e0 1325 case Opt_noac:
50c2f753
SF		 1326 printk(KERN_WARNING "CIFS: Mount option noac not "
1327 "supported. Instead set "
1328 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
8830d7e0
SP		 1329 break;
1330 case Opt_fsc:
607a569d 1331#ifndef CONFIG_CIFS_FSCACHE
83fb086e 1332 cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE "
607a569d 1333 "kernel config option set");
b946845a 1334 goto cifs_parse_mount_err;
607a569d 1335#endif
fa1df75d 1336 vol->fsc = true;
8830d7e0
SP		 1337 break;
1338 case Opt_mfsymlinks:
736a3320 1339 vol->mfsymlinks = true;
8830d7e0
SP		 1340 break;
1341 case Opt_multiuser:
0eb8a132 1342 vol->multiuser = true;
8830d7e0 1343 break;
d8162558
JL		 1344 case Opt_sloppy:
1345 sloppy = true;
1346 break;
8830d7e0
SP		 1347
1348 /* Numeric Values */
1349 case Opt_backupuid:
1350 if (get_option_ul(args, &option)) {
3d3ea8e6
SP		 1351 cERROR(1, "%s: Invalid backupuid value",
1352 __func__);
1353 goto cifs_parse_mount_err;
1354 }
8830d7e0 1355 vol->backupuid = option;
3d3ea8e6 1356 vol->backupuid_specified = true;
8830d7e0
SP		 1357 break;
1358 case Opt_backupgid:
1359 if (get_option_ul(args, &option)) {
3d3ea8e6
SP		 1360 cERROR(1, "%s: Invalid backupgid value",
1361 __func__);
1362 goto cifs_parse_mount_err;
1363 }
8830d7e0 1364 vol->backupgid = option;
3d3ea8e6 1365 vol->backupgid_specified = true;
8830d7e0
SP		 1366 break;
1367 case Opt_uid:
1368 if (get_option_ul(args, &option)) {
1369 cERROR(1, "%s: Invalid uid value",
1370 __func__);
1371 goto cifs_parse_mount_err;
1372 }
1373 vol->linux_uid = option;
1374 uid_specified = true;
1375 break;
1376 case Opt_cruid:
1377 if (get_option_ul(args, &option)) {
1378 cERROR(1, "%s: Invalid cruid value",
1379 __func__);
1380 goto cifs_parse_mount_err;
1381 }
1382 vol->cred_uid = option;
1383 break;
1384 case Opt_gid:
1385 if (get_option_ul(args, &option)) {
1386 cERROR(1, "%s: Invalid gid value",
1387 __func__);
1388 goto cifs_parse_mount_err;
1389 }
1390 vol->linux_gid = option;
1391 gid_specified = true;
1392 break;
1393 case Opt_file_mode:
1394 if (get_option_ul(args, &option)) {
1395 cERROR(1, "%s: Invalid file_mode value",
1396 __func__);
1397 goto cifs_parse_mount_err;
1398 }
1399 vol->file_mode = option;
1400 break;
1401 case Opt_dirmode:
1402 if (get_option_ul(args, &option)) {
1403 cERROR(1, "%s: Invalid dir_mode value",
1404 __func__);
1405 goto cifs_parse_mount_err;
1406 }
1407 vol->dir_mode = option;
1408 break;
1409 case Opt_port:
1410 if (get_option_ul(args, &option)) {
1411 cERROR(1, "%s: Invalid port value",
1412 __func__);
1413 goto cifs_parse_mount_err;
1414 }
1415 vol->port = option;
1416 break;
1417 case Opt_rsize:
1418 if (get_option_ul(args, &option)) {
1419 cERROR(1, "%s: Invalid rsize value",
1420 __func__);
b946845a 1421 goto cifs_parse_mount_err;
8830d7e0
SP		 1422 }
1423 vol->rsize = option;
1424 break;
1425 case Opt_wsize:
1426 if (get_option_ul(args, &option)) {
1427 cERROR(1, "%s: Invalid wsize value",
1428 __func__);
1429 goto cifs_parse_mount_err;
1430 }
1431 vol->wsize = option;
1432 break;
1433 case Opt_actimeo:
1434 if (get_option_ul(args, &option)) {
1435 cERROR(1, "%s: Invalid actimeo value",
1436 __func__);
1437 goto cifs_parse_mount_err;
1438 }
1439 vol->actimeo = HZ * option;
1440 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
1441 cERROR(1, "CIFS: attribute cache"
1442 "timeout too large");
1443 goto cifs_parse_mount_err;
1444 }
1445 break;
1446
1447 /* String Arguments */
1448
4fe9e963
SP		 1449 case Opt_blank_user:
1450 /* null user, ie. anonymous authentication */
1451 vol->nullauth = 1;
1452 vol->username = NULL;
1453 break;
8830d7e0
SP		 1454 case Opt_user:
1455 string = match_strdup(args);
1456 if (string == NULL)
1457 goto out_nomem;
1458
4fe9e963 1459 if (strnlen(string, MAX_USERNAME_SIZE) >
8830d7e0
SP		 1460 MAX_USERNAME_SIZE) {
1461 printk(KERN_WARNING "CIFS: username too long\n");
1462 goto cifs_parse_mount_err;
1463 }
1464 vol->username = kstrdup(string, GFP_KERNEL);
1465 if (!vol->username) {
1466 printk(KERN_WARNING "CIFS: no memory "
1467 "for username\n");
1468 goto cifs_parse_mount_err;
1469 }
1470 break;
1471 case Opt_blank_pass:
1472 vol->password = NULL;
1473 break;
1474 case Opt_pass:
1475 /* passwords have to be handled differently
1476 * to allow the character used for deliminator
1477 * to be passed within them
1478 */
1479
1480 /* Obtain the value string */
1481 value = strchr(data, '=');
10238074 1482 value++;
8830d7e0
SP		 1483
1484 /* Set tmp_end to end of the string */
1485 tmp_end = (char *) value + strlen(value);
1486
1487 /* Check if following character is the deliminator
1488 * If yes, we have encountered a double deliminator
1489 * reset the NULL character to the deliminator
1490 */
e73f843a 1491 if (tmp_end < end && tmp_end[1] == delim) {
8830d7e0
SP		 1492 tmp_end[0] = delim;
1493
e73f843a
SJ		 1494 /* Keep iterating until we get to a single
1495 * deliminator OR the end
1496 */
1497 while ((tmp_end = strchr(tmp_end, delim))
1498 != NULL && (tmp_end[1] == delim)) {
1499 tmp_end = (char *) &tmp_end[2];
1500 }
1501
1502 /* Reset var options to point to next element */
1503 if (tmp_end) {
1504 tmp_end[0] = '\0';
1505 options = (char *) &tmp_end[1];
1506 } else
1507 /* Reached the end of the mount option
1508 * string */
1509 options = end;
8830d7e0
SP		 1510 }
1511
8830d7e0
SP		 1512 /* Now build new password string */
1513 temp_len = strlen(value);
1514 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1515 if (vol->password == NULL) {
1516 printk(KERN_WARNING "CIFS: no memory "
1517 "for password\n");
1518 goto cifs_parse_mount_err;
1519 }
1520
1521 for (i = 0, j = 0; i < temp_len; i++, j++) {
1522 vol->password[j] = value[i];
1523 if ((value[i] == delim) &&
1524 value[i+1] == delim)
1525 /* skip the second deliminator */
1526 i++;
1527 }
1528 vol->password[j] = '\0';
1529 break;
4fe9e963
SP		 1530 case Opt_blank_ip:
1531 vol->UNCip = NULL;
1532 break;
8830d7e0
SP		 1533 case Opt_ip:
1534 string = match_strdup(args);
1535 if (string == NULL)
1536 goto out_nomem;
1537
4fe9e963 1538 if (strnlen(string, INET6_ADDRSTRLEN) >
8830d7e0
SP		 1539 INET6_ADDRSTRLEN) {
1540 printk(KERN_WARNING "CIFS: ip address "
1541 "too long\n");
1542 goto cifs_parse_mount_err;
1543 }
1544 vol->UNCip = kstrdup(string, GFP_KERNEL);
1545 if (!vol->UNCip) {
1546 printk(KERN_WARNING "CIFS: no memory "
1547 "for UNC IP\n");
1548 goto cifs_parse_mount_err;
1549 }
1550 break;
1551 case Opt_unc:
1552 string = match_strdup(args);
1553 if (string == NULL)
1554 goto out_nomem;
1555
8830d7e0
SP		 1556 temp_len = strnlen(string, 300);
1557 if (temp_len == 300) {
1558 printk(KERN_WARNING "CIFS: UNC name too long\n");
1559 goto cifs_parse_mount_err;
1560 }
1561
e4b41fb9
SP		 1562 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1563 if (vol->UNC == NULL) {
1564 printk(KERN_WARNING "CIFS: no memory for UNC\n");
1565 goto cifs_parse_mount_err;
1566 }
1567 strcpy(vol->UNC, string);
1568
8830d7e0 1569 if (strncmp(string, "//", 2) == 0) {
1da177e4
LT		 1570 vol->UNC[0] = '\\';
1571 vol->UNC[1] = '\\';
8830d7e0 1572 } else if (strncmp(string, "\\\\", 2) != 0) {
50c2f753 1573 printk(KERN_WARNING "CIFS: UNC Path does not "
8830d7e0 1574 "begin with // or \\\\\n");
b946845a 1575 goto cifs_parse_mount_err;
1da177e4 1576 }
8830d7e0 1577
8830d7e0
SP		 1578 break;
1579 case Opt_domain:
1580 string = match_strdup(args);
1581 if (string == NULL)
1582 goto out_nomem;
1583
4fe9e963 1584 if (strnlen(string, 256) == 256) {
8830d7e0
SP		 1585 printk(KERN_WARNING "CIFS: domain name too"
1586 " long\n");
1587 goto cifs_parse_mount_err;
1588 }
1589
1590 vol->domainname = kstrdup(string, GFP_KERNEL);
1591 if (!vol->domainname) {
1592 printk(KERN_WARNING "CIFS: no memory "
1593 "for domainname\n");
1594 goto cifs_parse_mount_err;
1595 }
1596 cFYI(1, "Domain name set");
1597 break;
1598 case Opt_srcaddr:
1599 string = match_strdup(args);
1600 if (string == NULL)
1601 goto out_nomem;
1602
4fe9e963 1603 if (!cifs_convert_address(
8830d7e0
SP		 1604 (struct sockaddr *)&vol->srcaddr,
1605 string, strlen(string))) {
1606 printk(KERN_WARNING "CIFS: Could not parse"
1607 " srcaddr: %s\n", string);
1608 goto cifs_parse_mount_err;
1609 }
1610 break;
1611 case Opt_prefixpath:
1612 string = match_strdup(args);
1613 if (string == NULL)
1614 goto out_nomem;
1615
8830d7e0
SP		 1616 temp_len = strnlen(string, 1024);
1617 if (string[0] != '/')
1618 temp_len++; /* missing leading slash */
1619 if (temp_len > 1024) {
1620 printk(KERN_WARNING "CIFS: prefix too long\n");
1621 goto cifs_parse_mount_err;
1622 }
1623
1624 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1625 if (vol->prepath == NULL) {
1626 printk(KERN_WARNING "CIFS: no memory "
1627 "for path prefix\n");
1628 goto cifs_parse_mount_err;
1629 }
1630
1631 if (string[0] != '/') {
1632 vol->prepath[0] = '/';
1633 strcpy(vol->prepath+1, string);
1634 } else
1635 strcpy(vol->prepath, string);
1636
1637 break;
1638 case Opt_iocharset:
1639 string = match_strdup(args);
1640 if (string == NULL)
1641 goto out_nomem;
1642
4fe9e963 1643 if (strnlen(string, 1024) >= 65) {
8830d7e0
SP		 1644 printk(KERN_WARNING "CIFS: iocharset name "
1645 "too long.\n");
1646 goto cifs_parse_mount_err;
1647 }
1648
1649 if (strnicmp(string, "default", 7) != 0) {
1650 vol->iocharset = kstrdup(string,
1651 GFP_KERNEL);
1652 if (!vol->iocharset) {
1653 printk(KERN_WARNING "CIFS: no memory"
1654 "for charset\n");
1655 goto cifs_parse_mount_err;
1656 }
1657 }
1658 /* if iocharset not set then load_nls_default
1659 * is used by caller
1660 */
1661 cFYI(1, "iocharset set to %s", string);
1662 break;
1663 case Opt_sockopt:
1664 string = match_strdup(args);
1665 if (string == NULL)
1666 goto out_nomem;
1667
67c1f529
JL		 1668 if (strnicmp(string, "TCP_NODELAY", 11) == 0) {
1669 printk(KERN_WARNING "CIFS: the "
1670 "sockopt=TCP_NODELAY option has been "
1671 "deprecated and will be removed "
1672 "in 3.9\n");
8830d7e0 1673 vol->sockopt_tcp_nodelay = 1;
67c1f529 1674 }
8830d7e0
SP		 1675 break;
1676 case Opt_netbiosname:
1677 string = match_strdup(args);
1678 if (string == NULL)
1679 goto out_nomem;
1680
8830d7e0
SP		 1681 memset(vol->source_rfc1001_name, 0x20,
1682 RFC1001_NAME_LEN);
1683 /*
1684 * FIXME: are there cases in which a comma can
1685 * be valid in workstation netbios name (and
1686 * need special handling)?
1687 */
1688 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1689 /* don't ucase netbiosname for user */
1690 if (string[i] == 0)
1691 break;
1692 vol->source_rfc1001_name[i] = string[i];
1693 }
1694 /* The string has 16th byte zero still from
1695 * set at top of the function
1696 */
1697 if (i == RFC1001_NAME_LEN && string[i] != 0)
1698 printk(KERN_WARNING "CIFS: netbiosname"
1699 " longer than 15 truncated.\n");
1700
1701 break;
1702 case Opt_servern:
1703 /* servernetbiosname specified override *SMBSERVER */
1704 string = match_strdup(args);
1705 if (string == NULL)
1706 goto out_nomem;
1707
8830d7e0
SP		 1708 /* last byte, type, is 0x20 for servr type */
1709 memset(vol->target_rfc1001_name, 0x20,
1710 RFC1001_NAME_LEN_WITH_NULL);
1711
1712 /* BB are there cases in which a comma can be
1713 valid in this workstation netbios name
1714 (and need special handling)? */
1715
1716 /* user or mount helper must uppercase the
1717 netbios name */
1718 for (i = 0; i < 15; i++) {
1719 if (string[i] == 0)
1720 break;
1721 vol->target_rfc1001_name[i] = string[i];
1722 }
1723 /* The string has 16th byte zero still from
1724 set at top of the function */
1725 if (i == RFC1001_NAME_LEN && string[i] != 0)
1726 printk(KERN_WARNING "CIFS: server net"
1727 "biosname longer than 15 truncated.\n");
1728 break;
1729 case Opt_ver:
1730 string = match_strdup(args);
1731 if (string == NULL)
1732 goto out_nomem;
1733
5249af32 1734 if (strnicmp(string, "1", 1) == 0) {
8830d7e0
SP		 1735 /* This is the default */
1736 break;
1737 }
1738 /* For all other value, error */
1739 printk(KERN_WARNING "CIFS: Invalid version"
1740 " specified\n");
b946845a 1741 goto cifs_parse_mount_err;
23db65f5
JL		 1742 case Opt_vers:
1743 string = match_strdup(args);
1744 if (string == NULL)
1745 goto out_nomem;
1746
1747 if (cifs_parse_smb_version(string, vol) != 0)
1748 goto cifs_parse_mount_err;
1749 break;
8830d7e0
SP		 1750 case Opt_sec:
1751 string = match_strdup(args);
1752 if (string == NULL)
1753 goto out_nomem;
1754
8830d7e0
SP		 1755 if (cifs_parse_security_flavors(string, vol) != 0)
1756 goto cifs_parse_mount_err;
1757 break;
15b6a473
JL		 1758 case Opt_cache:
1759 string = match_strdup(args);
1760 if (string == NULL)
1761 goto out_nomem;
1762
1763 if (cifs_parse_cache_flavor(string, vol) != 0)
1764 goto cifs_parse_mount_err;
1765 break;
8830d7e0 1766 default:
d8162558
JL		 1767 /*
1768 * An option we don't recognize. Save it off for later
1769 * if we haven't already found one
1770 */
1771 if (!invalid)
1772 invalid = data;
8830d7e0 1773 break;
1da177e4 1774 }
8830d7e0
SP		 1775 /* Free up any allocated string */
1776 kfree(string);
1777 string = NULL;
1da177e4 1778 }
0eb8a132 1779
d8162558
JL		 1780 if (!sloppy && invalid) {
1781 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1782 goto cifs_parse_mount_err;
1783 }
1784
8a8798a5
JL		 1785#ifndef CONFIG_KEYS
1786 /* Muliuser mounts require CONFIG_KEYS support */
1787 if (vol->multiuser) {
1788 cERROR(1, "Multiuser mounts require kernels with "
1789 "CONFIG_KEYS enabled.");
b946845a 1790 goto cifs_parse_mount_err;
0eb8a132 1791 }
8a8798a5 1792#endif
0eb8a132 1793
fb8c4b14 1794 if (vol->UNCip == NULL)
1da177e4
LT		 1795 vol->UNCip = &vol->UNC[2];
1796
9b9d6b24
JL		 1797 if (uid_specified)
1798 vol->override_uid = override_uid;
1799 else if (override_uid == 1)
1800 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1801 "specified with no uid= option.\n");
1802
1803 if (gid_specified)
1804 vol->override_gid = override_gid;
1805 else if (override_gid == 1)
1806 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1807 "specified with no gid= option.\n");
1808
b946845a 1809 kfree(mountdata_copy);
1da177e4 1810 return 0;
b946845a 1811
8830d7e0
SP		 1812out_nomem:
1813 printk(KERN_WARNING "Could not allocate temporary buffer\n");
b946845a 1814cifs_parse_mount_err:
8830d7e0 1815 kfree(string);
b946845a
SF		 1816 kfree(mountdata_copy);
1817 return 1;
1da177e4
LT		 1818}
1819
3eb9a889
BG		 1820/** Returns true if srcaddr isn't specified and rhs isn't
1821 * specified, or if srcaddr is specified and
1822 * matches the IP address of the rhs argument.
1823 */
1824static bool
1825srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1826{
1827 switch (srcaddr->sa_family) {
1828 case AF_UNSPEC:
1829 return (rhs->sa_family == AF_UNSPEC);
1830 case AF_INET: {
1831 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1832 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1833 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1834 }
1835 case AF_INET6: {
1836 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
1837 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs;
1838 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1839 }
1840 default:
1841 WARN_ON(1);
1842 return false; /* don't expect to be here */
1843 }
1844}
1845
4b886136
PS		 1846/*
1847 * If no port is specified in addr structure, we try to match with 445 port
1848 * and if it fails - with 139 ports. It should be called only if address
1849 * families of server and addr are equal.
1850 */
1851static bool
1852match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1853{
6da97910 1854 __be16 port, *sport;
4b886136
PS		 1855
1856 switch (addr->sa_family) {
1857 case AF_INET:
1858 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1859 port = ((struct sockaddr_in *) addr)->sin_port;
1860 break;
1861 case AF_INET6:
1862 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1863 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1864 break;
1865 default:
1866 WARN_ON(1);
1867 return false;
1868 }
1869
1870 if (!port) {
1871 port = htons(CIFS_PORT);
1872 if (port == *sport)
1873 return true;
1874
1875 port = htons(RFC1001_PORT);
1876 }
1877
1878 return port == *sport;
1879}
3eb9a889 1880
4515148e 1881static bool
3eb9a889
BG		 1882match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1883 struct sockaddr *srcaddr)
4515148e 1884{
4515148e 1885 switch (addr->sa_family) {
a9f1b85e
PS		 1886 case AF_INET: {
1887 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1888 struct sockaddr_in *srv_addr4 =
1889 (struct sockaddr_in *)&server->dstaddr;
1890
1891 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
4515148e 1892 return false;
4515148e 1893 break;
a9f1b85e
PS		 1894 }
1895 case AF_INET6: {
1896 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1897 struct sockaddr_in6 *srv_addr6 =
1898 (struct sockaddr_in6 *)&server->dstaddr;
1899
4515148e 1900 if (!ipv6_addr_equal(&addr6->sin6_addr,
a9f1b85e 1901 &srv_addr6->sin6_addr))
4515148e 1902 return false;
a9f1b85e 1903 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
4515148e 1904 return false;
4515148e
JL		 1905 break;
1906 }
a9f1b85e
PS		 1907 default:
1908 WARN_ON(1);
1909 return false; /* don't expect to be here */
1910 }
4515148e 1911
3eb9a889
BG		 1912 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1913 return false;
1914
4515148e
JL		 1915 return true;
1916}
1917
daf5b0b6
JL		 1918static bool
1919match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1920{
1921 unsigned int secFlags;
1922
1923 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1924 secFlags = vol->secFlg;
1925 else
1926 secFlags = global_secflags | vol->secFlg;
1927
1928 switch (server->secType) {
1929 case LANMAN:
1930 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1931 return false;
1932 break;
1933 case NTLMv2:
1934 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1935 return false;
1936 break;
1937 case NTLM:
1938 if (!(secFlags & CIFSSEC_MAY_NTLM))
1939 return false;
1940 break;
1941 case Kerberos:
1942 if (!(secFlags & CIFSSEC_MAY_KRB5))
1943 return false;
1944 break;
1945 case RawNTLMSSP:
1946 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
1947 return false;
1948 break;
1949 default:
1950 /* shouldn't happen */
1951 return false;
1952 }
1953
25985edc 1954 /* now check if signing mode is acceptable */
daf5b0b6 1955 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
96daf2b0 1956 (server->sec_mode & SECMODE_SIGN_REQUIRED))
daf5b0b6
JL		 1957 return false;
1958 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
96daf2b0 1959 (server->sec_mode &
daf5b0b6
JL		 1960 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
1961 return false;
1962
1963 return true;
1964}
1965
37bb04e5
PS		 1966static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr,
1967 struct smb_vol *vol)
1968{
23db65f5
JL		 1969 if ((server->vals != vol->vals) || (server->ops != vol->ops))
1970 return 0;
1971
37bb04e5
PS		 1972 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
1973 return 0;
1974
1975 if (!match_address(server, addr,
1976 (struct sockaddr *)&vol->srcaddr))
1977 return 0;
1978
1979 if (!match_port(server, addr))
1980 return 0;
1981
1982 if (!match_security(server, vol))
1983 return 0;
1984
1985 return 1;
1986}
1987
e7ddee90 1988static struct TCP_Server_Info *
daf5b0b6 1989cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
1da177e4 1990{
e7ddee90 1991 struct TCP_Server_Info *server;
e7ddee90 1992
3f9bcca7 1993 spin_lock(&cifs_tcp_ses_lock);
4515148e 1994 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
37bb04e5 1995 if (!match_server(server, addr, vol))
daf5b0b6
JL		 1996 continue;
1997
e7ddee90 1998 ++server->srv_count;
3f9bcca7 1999 spin_unlock(&cifs_tcp_ses_lock);
b6b38f70 2000 cFYI(1, "Existing tcp session with server found");
e7ddee90 2001 return server;
1da177e4 2002 }
3f9bcca7 2003 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2004 return NULL;
2005}
1b20d672 2006
14fbf50d 2007static void
e7ddee90 2008cifs_put_tcp_session(struct TCP_Server_Info *server)
1da177e4 2009{
e7ddee90 2010 struct task_struct *task;
1b20d672 2011
3f9bcca7 2012 spin_lock(&cifs_tcp_ses_lock);
e7ddee90 2013 if (--server->srv_count > 0) {
3f9bcca7 2014 spin_unlock(&cifs_tcp_ses_lock);
e7ddee90 2015 return;
1da177e4 2016 }
1b20d672 2017
f1d0c998
RL		 2018 put_net(cifs_net_ns(server));
2019
e7ddee90 2020 list_del_init(&server->tcp_ses_list);
3f9bcca7 2021 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2022
c74093b6
JL		 2023 cancel_delayed_work_sync(&server->echo);
2024
e7ddee90
JL		 2025 spin_lock(&GlobalMid_Lock);
2026 server->tcpStatus = CifsExiting;
2027 spin_unlock(&GlobalMid_Lock);
dea570e0 2028
d2b91521 2029 cifs_crypto_shash_release(server);
488f1d2d
SJ		 2030 cifs_fscache_release_client_cookie(server);
2031
21e73393
SP		 2032 kfree(server->session_key.response);
2033 server->session_key.response = NULL;
2034 server->session_key.len = 0;
2035
e7ddee90
JL		 2036 task = xchg(&server->tsk, NULL);
2037 if (task)
2038 force_sig(SIGKILL, task);
1da177e4
LT		 2039}
2040
63c038c2
JL		 2041static struct TCP_Server_Info *
2042cifs_get_tcp_session(struct smb_vol *volume_info)
2043{
2044 struct TCP_Server_Info *tcp_ses = NULL;
a9ac49d3 2045 struct sockaddr_storage addr;
63c038c2
JL		 2046 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
2047 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
2048 int rc;
2049
a9ac49d3 2050 memset(&addr, 0, sizeof(struct sockaddr_storage));
63c038c2 2051
b6b38f70 2052 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
63c038c2 2053
1e68b2b2 2054 if (volume_info->UNCip && volume_info->UNC) {
50d97160
JL		 2055 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
2056 volume_info->UNCip,
67b7626a 2057 strlen(volume_info->UNCip),
50d97160 2058 volume_info->port);
1e68b2b2 2059 if (!rc) {
63c038c2
JL		 2060 /* we failed translating address */
2061 rc = -EINVAL;
2062 goto out_err;
2063 }
63c038c2
JL		 2064 } else if (volume_info->UNCip) {
2065 /* BB using ip addr as tcp_ses name to connect to the
2066 DFS root below */
b6b38f70 2067 cERROR(1, "Connecting to DFS root not implemented yet");
63c038c2
JL		 2068 rc = -EINVAL;
2069 goto out_err;
2070 } else /* which tcp_sess DFS root would we conect to */ {
b6b38f70
JP		 2071 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
2072 "unc=//192.168.1.100/public) specified");
63c038c2
JL		 2073 rc = -EINVAL;
2074 goto out_err;
2075 }
2076
2077 /* see if we already have a matching tcp_ses */
daf5b0b6 2078 tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
63c038c2
JL		 2079 if (tcp_ses)
2080 return tcp_ses;
2081
2082 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2083 if (!tcp_ses) {
2084 rc = -ENOMEM;
2085 goto out_err;
2086 }
2087
d2b91521
SP		 2088 rc = cifs_crypto_shash_allocate(tcp_ses);
2089 if (rc) {
2090 cERROR(1, "could not setup hash structures rc %d", rc);
2091 goto out_err;
2092 }
2093
23db65f5
JL		 2094 tcp_ses->ops = volume_info->ops;
2095 tcp_ses->vals = volume_info->vals;
f1d0c998 2096 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
63c038c2
JL		 2097 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2098 if (IS_ERR(tcp_ses->hostname)) {
2099 rc = PTR_ERR(tcp_ses->hostname);
f7c5445a 2100 goto out_err_crypto_release;
63c038c2
JL		 2101 }
2102
2103 tcp_ses->noblocksnd = volume_info->noblocksnd;
2104 tcp_ses->noautotune = volume_info->noautotune;
6a5fa236 2105 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
fc40f9cf 2106 tcp_ses->in_flight = 0;
2d86dbc9 2107 tcp_ses->credits = 1;
63c038c2
JL		 2108 init_waitqueue_head(&tcp_ses->response_q);
2109 init_waitqueue_head(&tcp_ses->request_q);
2110 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2111 mutex_init(&tcp_ses->srv_mutex);
2112 memcpy(tcp_ses->workstation_RFC1001_name,
2113 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2114 memcpy(tcp_ses->server_RFC1001_name,
2115 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
5d0d2882 2116 tcp_ses->session_estab = false;
63c038c2 2117 tcp_ses->sequence_number = 0;
fda35943 2118 tcp_ses->lstrp = jiffies;
58fa015f 2119 spin_lock_init(&tcp_ses->req_lock);
63c038c2
JL		 2120 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2121 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
c74093b6 2122 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
63c038c2
JL		 2123
2124 /*
2125 * at this point we are the only ones with the pointer
2126 * to the struct since the kernel thread not created yet
2127 * no need to spinlock this init of tcpStatus or srv_count
2128 */
2129 tcp_ses->tcpStatus = CifsNew;
3eb9a889
BG		 2130 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2131 sizeof(tcp_ses->srcaddr));
63c038c2
JL		 2132 ++tcp_ses->srv_count;
2133
a9ac49d3 2134 if (addr.ss_family == AF_INET6) {
b6b38f70 2135 cFYI(1, "attempting ipv6 connect");
63c038c2
JL		 2136 /* BB should we allow ipv6 on port 139? */
2137 /* other OS never observed in Wild doing 139 with v6 */
a9f1b85e
PS		 2138 memcpy(&tcp_ses->dstaddr, sin_server6,
2139 sizeof(struct sockaddr_in6));
2140 } else
2141 memcpy(&tcp_ses->dstaddr, sin_server,
2142 sizeof(struct sockaddr_in));
2143
2144 rc = ip_connect(tcp_ses);
63c038c2 2145 if (rc < 0) {
b6b38f70 2146 cERROR(1, "Error connecting to socket. Aborting operation");
f7c5445a 2147 goto out_err_crypto_release;
63c038c2
JL		 2148 }
2149
2150 /*
2151 * since we're in a cifs function already, we know that
2152 * this will succeed. No need for try_module_get().
2153 */
2154 __module_get(THIS_MODULE);
7c97c200 2155 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
63c038c2
JL		 2156 tcp_ses, "cifsd");
2157 if (IS_ERR(tcp_ses->tsk)) {
2158 rc = PTR_ERR(tcp_ses->tsk);
b6b38f70 2159 cERROR(1, "error %d create cifsd thread", rc);
63c038c2 2160 module_put(THIS_MODULE);
f7c5445a 2161 goto out_err_crypto_release;
63c038c2 2162 }
fd88ce93 2163 tcp_ses->tcpStatus = CifsNeedNegotiate;
63c038c2
JL		 2164
2165 /* thread spawned, put it on the list */
3f9bcca7 2166 spin_lock(&cifs_tcp_ses_lock);
63c038c2 2167 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
3f9bcca7 2168 spin_unlock(&cifs_tcp_ses_lock);
63c038c2 2169
488f1d2d
SJ		 2170 cifs_fscache_get_client_cookie(tcp_ses);
2171
c74093b6 2172 /* queue echo request delayed work */
da472fc8 2173 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
c74093b6 2174
63c038c2
JL		 2175 return tcp_ses;
2176
f7c5445a 2177out_err_crypto_release:
d2b91521
SP		 2178 cifs_crypto_shash_release(tcp_ses);
2179
f1d0c998
RL		 2180 put_net(cifs_net_ns(tcp_ses));
2181
63c038c2
JL		 2182out_err:
2183 if (tcp_ses) {
8347a5cd
SF		 2184 if (!IS_ERR(tcp_ses->hostname))
2185 kfree(tcp_ses->hostname);
63c038c2
JL		 2186 if (tcp_ses->ssocket)
2187 sock_release(tcp_ses->ssocket);
2188 kfree(tcp_ses);
2189 }
2190 return ERR_PTR(rc);
2191}
2192
96daf2b0 2193static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
37bb04e5
PS		 2194{
2195 switch (ses->server->secType) {
2196 case Kerberos:
2197 if (vol->cred_uid != ses->cred_uid)
2198 return 0;
2199 break;
2200 default:
04febabc
JL		 2201 /* NULL username means anonymous session */
2202 if (ses->user_name == NULL) {
2203 if (!vol->nullauth)
2204 return 0;
2205 break;
2206 }
2207
37bb04e5 2208 /* anything else takes username/password */
04febabc
JL		 2209 if (strncmp(ses->user_name,
2210 vol->username ? vol->username : "",
37bb04e5
PS		 2211 MAX_USERNAME_SIZE))
2212 return 0;
2213 if (strlen(vol->username) != 0 &&
2214 ses->password != NULL &&
2215 strncmp(ses->password,
2216 vol->password ? vol->password : "",
2217 MAX_PASSWORD_SIZE))
2218 return 0;
2219 }
2220 return 1;
2221}
2222
96daf2b0 2223static struct cifs_ses *
4ff67b72 2224cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1da177e4 2225{
96daf2b0 2226 struct cifs_ses *ses;
dea570e0 2227
3f9bcca7 2228 spin_lock(&cifs_tcp_ses_lock);
4ff67b72 2229 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
37bb04e5
PS		 2230 if (!match_session(ses, vol))
2231 continue;
14fbf50d 2232 ++ses->ses_count;
3f9bcca7 2233 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2234 return ses;
2235 }
3f9bcca7 2236 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2237 return NULL;
2238}
dea570e0 2239
14fbf50d 2240static void
96daf2b0 2241cifs_put_smb_ses(struct cifs_ses *ses)
14fbf50d 2242{
58c45c58 2243 unsigned int xid;
14fbf50d 2244 struct TCP_Server_Info *server = ses->server;
dea570e0 2245
ac3aa2f8 2246 cFYI(1, "%s: ses_count=%d", __func__, ses->ses_count);
3f9bcca7 2247 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 2248 if (--ses->ses_count > 0) {
3f9bcca7 2249 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2250 return;
2251 }
dea570e0 2252
14fbf50d 2253 list_del_init(&ses->smb_ses_list);
3f9bcca7 2254 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2255
58c45c58 2256 if (ses->status == CifsGood && server->ops->logoff) {
6d5786a3 2257 xid = get_xid();
58c45c58 2258 server->ops->logoff(xid, ses);
6d5786a3 2259 _free_xid(xid);
14fbf50d
JL		 2260 }
2261 sesInfoFree(ses);
2262 cifs_put_tcp_session(server);
2263}
dea570e0 2264
8a8798a5
JL		 2265#ifdef CONFIG_KEYS
2266
2267/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
2268#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
2269
2270/* Populate username and pw fields from keyring if possible */
2271static int
2272cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2273{
2274 int rc = 0;
2275 char *desc, *delim, *payload;
2276 ssize_t len;
2277 struct key *key;
2278 struct TCP_Server_Info *server = ses->server;
2279 struct sockaddr_in *sa;
2280 struct sockaddr_in6 *sa6;
2281 struct user_key_payload *upayload;
2282
2283 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2284 if (!desc)
2285 return -ENOMEM;
2286
2287 /* try to find an address key first */
2288 switch (server->dstaddr.ss_family) {
2289 case AF_INET:
2290 sa = (struct sockaddr_in *)&server->dstaddr;
2291 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2292 break;
2293 case AF_INET6:
2294 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2295 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2296 break;
2297 default:
2298 cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family);
2299 rc = -EINVAL;
2300 goto out_err;
2301 }
2302
2303 cFYI(1, "%s: desc=%s", __func__, desc);
2304 key = request_key(&key_type_logon, desc, "");
2305 if (IS_ERR(key)) {
2306 if (!ses->domainName) {
2307 cFYI(1, "domainName is NULL");
2308 rc = PTR_ERR(key);
2309 goto out_err;
2310 }
2311
2312 /* didn't work, try to find a domain key */
2313 sprintf(desc, "cifs:d:%s", ses->domainName);
2314 cFYI(1, "%s: desc=%s", __func__, desc);
2315 key = request_key(&key_type_logon, desc, "");
2316 if (IS_ERR(key)) {
2317 rc = PTR_ERR(key);
2318 goto out_err;
2319 }
2320 }
2321
2322 down_read(&key->sem);
2323 upayload = key->payload.data;
2324 if (IS_ERR_OR_NULL(upayload)) {
4edc53c1 2325 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
8a8798a5
JL		 2326 goto out_key_put;
2327 }
2328
2329 /* find first : in payload */
2330 payload = (char *)upayload->data;
2331 delim = strnchr(payload, upayload->datalen, ':');
2332 cFYI(1, "payload=%s", payload);
2333 if (!delim) {
2334 cFYI(1, "Unable to find ':' in payload (datalen=%d)",
2335 upayload->datalen);
2336 rc = -EINVAL;
2337 goto out_key_put;
2338 }
2339
2340 len = delim - payload;
2341 if (len > MAX_USERNAME_SIZE || len <= 0) {
000f9bb8 2342 cFYI(1, "Bad value from username search (len=%zd)", len);
8a8798a5
JL		 2343 rc = -EINVAL;
2344 goto out_key_put;
2345 }
2346
2347 vol->username = kstrndup(payload, len, GFP_KERNEL);
2348 if (!vol->username) {
000f9bb8 2349 cFYI(1, "Unable to allocate %zd bytes for username", len);
8a8798a5
JL		 2350 rc = -ENOMEM;
2351 goto out_key_put;
2352 }
2353 cFYI(1, "%s: username=%s", __func__, vol->username);
2354
2355 len = key->datalen - (len + 1);
2356 if (len > MAX_PASSWORD_SIZE || len <= 0) {
000f9bb8 2357 cFYI(1, "Bad len for password search (len=%zd)", len);
8a8798a5
JL		 2358 rc = -EINVAL;
2359 kfree(vol->username);
2360 vol->username = NULL;
2361 goto out_key_put;
2362 }
2363
2364 ++delim;
2365 vol->password = kstrndup(delim, len, GFP_KERNEL);
2366 if (!vol->password) {
000f9bb8 2367 cFYI(1, "Unable to allocate %zd bytes for password", len);
8a8798a5
JL		 2368 rc = -ENOMEM;
2369 kfree(vol->username);
2370 vol->username = NULL;
2371 goto out_key_put;
2372 }
2373
2374out_key_put:
2375 up_read(&key->sem);
2376 key_put(key);
2377out_err:
2378 kfree(desc);
2379 cFYI(1, "%s: returning %d", __func__, rc);
2380 return rc;
2381}
2382#else /* ! CONFIG_KEYS */
2383static inline int
2384cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2385 struct cifs_ses *ses __attribute__((unused)))
2386{
2387 return -ENOSYS;
2388}
2389#endif /* CONFIG_KEYS */
2390
d9b94201
SF		 2391static bool warned_on_ntlm; /* globals init to false automatically */
2392
96daf2b0 2393static struct cifs_ses *
36988c76
JL		 2394cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2395{
286170aa
PS		 2396 int rc = -ENOMEM;
2397 unsigned int xid;
96daf2b0 2398 struct cifs_ses *ses;
a9f1b85e
PS		 2399 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2400 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
36988c76 2401
6d5786a3 2402 xid = get_xid();
36988c76 2403
4ff67b72 2404 ses = cifs_find_smb_ses(server, volume_info);
36988c76
JL		 2405 if (ses) {
2406 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
2407
36988c76 2408 mutex_lock(&ses->session_mutex);
198b5682
JL		 2409 rc = cifs_negotiate_protocol(xid, ses);
2410 if (rc) {
2411 mutex_unlock(&ses->session_mutex);
2412 /* problem -- put our ses reference */
2413 cifs_put_smb_ses(ses);
6d5786a3 2414 free_xid(xid);
198b5682
JL		 2415 return ERR_PTR(rc);
2416 }
36988c76
JL		 2417 if (ses->need_reconnect) {
2418 cFYI(1, "Session needs reconnect");
2419 rc = cifs_setup_session(xid, ses,
2420 volume_info->local_nls);
2421 if (rc) {
2422 mutex_unlock(&ses->session_mutex);
2423 /* problem -- put our reference */
2424 cifs_put_smb_ses(ses);
6d5786a3 2425 free_xid(xid);
36988c76
JL		 2426 return ERR_PTR(rc);
2427 }
2428 }
2429 mutex_unlock(&ses->session_mutex);
460cf341
JL		 2430
2431 /* existing SMB ses has a server reference already */
2432 cifs_put_tcp_session(server);
6d5786a3 2433 free_xid(xid);
36988c76
JL		 2434 return ses;
2435 }
2436
2437 cFYI(1, "Existing smb sess not found");
2438 ses = sesInfoAlloc();
2439 if (ses == NULL)
2440 goto get_ses_fail;
2441
2442 /* new SMB session uses our server ref */
2443 ses->server = server;
a9f1b85e
PS		 2444 if (server->dstaddr.ss_family == AF_INET6)
2445 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
36988c76 2446 else
a9f1b85e 2447 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
36988c76 2448
8727c8a8
SF		 2449 if (volume_info->username) {
2450 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2451 if (!ses->user_name)
2452 goto get_ses_fail;
2453 }
36988c76
JL		 2454
2455 /* volume_info->password freed at unmount */
2456 if (volume_info->password) {
2457 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2458 if (!ses->password)
2459 goto get_ses_fail;
2460 }
2461 if (volume_info->domainname) {
d3686d54
SP		 2462 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2463 if (!ses->domainName)
2464 goto get_ses_fail;
36988c76 2465 }
3e4b3e1f 2466 ses->cred_uid = volume_info->cred_uid;
36988c76 2467 ses->linux_uid = volume_info->linux_uid;
d9b94201
SF		 2468
2469 /* ntlmv2 is much stronger than ntlm security, and has been broadly
2470 supported for many years, time to update default security mechanism */
2471 if ((volume_info->secFlg == 0) && warned_on_ntlm == false) {
2472 warned_on_ntlm = true;
2473 cERROR(1, "default security mechanism requested. The default "
2474 "security mechanism will be upgraded from ntlm to "
225de11e 2475 "ntlmv2 in kernel release 3.3");
d9b94201 2476 }
36988c76
JL		 2477 ses->overrideSecFlg = volume_info->secFlg;
2478
2479 mutex_lock(&ses->session_mutex);
198b5682
JL		 2480 rc = cifs_negotiate_protocol(xid, ses);
2481 if (!rc)
2482 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
36988c76 2483 mutex_unlock(&ses->session_mutex);
c8e56f1f 2484 if (rc)
36988c76
JL		 2485 goto get_ses_fail;
2486
2487 /* success, put it on the list */
3f9bcca7 2488 spin_lock(&cifs_tcp_ses_lock);
36988c76 2489 list_add(&ses->smb_ses_list, &server->smb_ses_list);
3f9bcca7 2490 spin_unlock(&cifs_tcp_ses_lock);
36988c76 2491
6d5786a3 2492 free_xid(xid);
36988c76
JL		 2493 return ses;
2494
2495get_ses_fail:
2496 sesInfoFree(ses);
6d5786a3 2497 free_xid(xid);
36988c76
JL		 2498 return ERR_PTR(rc);
2499}
2500
96daf2b0 2501static int match_tcon(struct cifs_tcon *tcon, const char *unc)
37bb04e5
PS		 2502{
2503 if (tcon->tidStatus == CifsExiting)
2504 return 0;
2505 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2506 return 0;
2507 return 1;
2508}
2509
96daf2b0
SF		 2510static struct cifs_tcon *
2511cifs_find_tcon(struct cifs_ses *ses, const char *unc)
f1987b44
JL		 2512{
2513 struct list_head *tmp;
96daf2b0 2514 struct cifs_tcon *tcon;
f1987b44 2515
3f9bcca7 2516 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2517 list_for_each(tmp, &ses->tcon_list) {
96daf2b0 2518 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
37bb04e5 2519 if (!match_tcon(tcon, unc))
f1987b44 2520 continue;
f1987b44 2521 ++tcon->tc_count;
3f9bcca7 2522 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2523 return tcon;
1da177e4 2524 }
3f9bcca7 2525 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2526 return NULL;
2527}
2528
f1987b44 2529static void
96daf2b0 2530cifs_put_tcon(struct cifs_tcon *tcon)
f1987b44 2531{
2e6e02ab 2532 unsigned int xid;
96daf2b0 2533 struct cifs_ses *ses = tcon->ses;
f1987b44 2534
ac3aa2f8 2535 cFYI(1, "%s: tc_count=%d", __func__, tcon->tc_count);
3f9bcca7 2536 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2537 if (--tcon->tc_count > 0) {
3f9bcca7 2538 spin_unlock(&cifs_tcp_ses_lock);
f1987b44
JL		 2539 return;
2540 }
2541
2542 list_del_init(&tcon->tcon_list);
3f9bcca7 2543 spin_unlock(&cifs_tcp_ses_lock);
f1987b44 2544
6d5786a3 2545 xid = get_xid();
2e6e02ab
PS		 2546 if (ses->server->ops->tree_disconnect)
2547 ses->server->ops->tree_disconnect(xid, tcon);
6d5786a3 2548 _free_xid(xid);
f1987b44 2549
d03382ce 2550 cifs_fscache_release_super_cookie(tcon);
9f841593 2551 tconInfoFree(tcon);
f1987b44
JL		 2552 cifs_put_smb_ses(ses);
2553}
2554
96daf2b0
SF		 2555static struct cifs_tcon *
2556cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
d00c28de
JL		 2557{
2558 int rc, xid;
96daf2b0 2559 struct cifs_tcon *tcon;
d00c28de
JL		 2560
2561 tcon = cifs_find_tcon(ses, volume_info->UNC);
2562 if (tcon) {
2563 cFYI(1, "Found match on UNC path");
2564 /* existing tcon already has a reference */
2565 cifs_put_smb_ses(ses);
2566 if (tcon->seal != volume_info->seal)
2567 cERROR(1, "transport encryption setting "
2568 "conflicts with existing tid");
2569 return tcon;
2570 }
2571
2e6e02ab
PS		 2572 if (!ses->server->ops->tree_connect) {
2573 rc = -ENOSYS;
2574 goto out_fail;
2575 }
2576
d00c28de
JL		 2577 tcon = tconInfoAlloc();
2578 if (tcon == NULL) {
2579 rc = -ENOMEM;
2580 goto out_fail;
2581 }
2582
2583 tcon->ses = ses;
2584 if (volume_info->password) {
2585 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2586 if (!tcon->password) {
2587 rc = -ENOMEM;
2588 goto out_fail;
2589 }
2590 }
2591
2592 if (strchr(volume_info->UNC + 3, '\\') == NULL
2593 && strchr(volume_info->UNC + 3, '/') == NULL) {
2594 cERROR(1, "Missing share name");
2595 rc = -ENODEV;
2596 goto out_fail;
2597 }
2598
2e6e02ab
PS		 2599 /*
2600 * BB Do we need to wrap session_mutex around this TCon call and Unix
2601 * SetFS as we do on SessSetup and reconnect?
2602 */
6d5786a3 2603 xid = get_xid();
2e6e02ab
PS		 2604 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2605 volume_info->local_nls);
6d5786a3 2606 free_xid(xid);
2e6e02ab 2607 cFYI(1, "Tcon rc = %d", rc);
d00c28de
JL		 2608 if (rc)
2609 goto out_fail;
2610
2611 if (volume_info->nodfs) {
2612 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2613 cFYI(1, "DFS disabled (%d)", tcon->Flags);
2614 }
2615 tcon->seal = volume_info->seal;
2e6e02ab
PS		 2616 /*
2617 * We can have only one retry value for a connection to a share so for
2618 * resources mounted more than once to the same server share the last
2619 * value passed in for the retry flag is used.
2620 */
d00c28de
JL		 2621 tcon->retry = volume_info->retry;
2622 tcon->nocase = volume_info->nocase;
2623 tcon->local_lease = volume_info->local_lease;
233839b1 2624 INIT_LIST_HEAD(&tcon->pending_opens);
d00c28de 2625
3f9bcca7 2626 spin_lock(&cifs_tcp_ses_lock);
d00c28de 2627 list_add(&tcon->tcon_list, &ses->tcon_list);
3f9bcca7 2628 spin_unlock(&cifs_tcp_ses_lock);
d00c28de 2629
d03382ce
SJ		 2630 cifs_fscache_get_super_cookie(tcon);
2631
d00c28de
JL		 2632 return tcon;
2633
2634out_fail:
2635 tconInfoFree(tcon);
2636 return ERR_PTR(rc);
2637}
2638
9d002df4
JL		 2639void
2640cifs_put_tlink(struct tcon_link *tlink)
2641{
2642 if (!tlink || IS_ERR(tlink))
2643 return;
2644
2645 if (!atomic_dec_and_test(&tlink->tl_count) ||
2646 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2647 tlink->tl_time = jiffies;
2648 return;
2649 }
2650
2651 if (!IS_ERR(tlink_tcon(tlink)))
2652 cifs_put_tcon(tlink_tcon(tlink));
2653 kfree(tlink);
2654 return;
2655}
d00c28de 2656
25c7f41e 2657static inline struct tcon_link *
cd51875d
PS		 2658cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2659{
2660 return cifs_sb->master_tlink;
2661}
25c7f41e
PS		 2662
2663static int
2664compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2665{
2666 struct cifs_sb_info *old = CIFS_SB(sb);
2667 struct cifs_sb_info *new = mnt_data->cifs_sb;
2668
2669 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2670 return 0;
2671
2672 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2673 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2674 return 0;
2675
25c7f41e 2676 /*
5eba8ab3
JL		 2677 * We want to share sb only if we don't specify an r/wsize or
2678 * specified r/wsize is greater than or equal to existing one.
25c7f41e
PS		 2679 */
2680 if (new->wsize && new->wsize < old->wsize)
2681 return 0;
2682
5eba8ab3
JL		 2683 if (new->rsize && new->rsize < old->rsize)
2684 return 0;
2685
25c7f41e
PS		 2686 if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid)
2687 return 0;
2688
2689 if (old->mnt_file_mode != new->mnt_file_mode ||
2690 old->mnt_dir_mode != new->mnt_dir_mode)
2691 return 0;
2692
2693 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2694 return 0;
2695
2696 if (old->actimeo != new->actimeo)
2697 return 0;
2698
2699 return 1;
2700}
2701
2702int
2703cifs_match_super(struct super_block *sb, void *data)
2704{
2705 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2706 struct smb_vol *volume_info;
2707 struct cifs_sb_info *cifs_sb;
2708 struct TCP_Server_Info *tcp_srv;
96daf2b0
SF		 2709 struct cifs_ses *ses;
2710 struct cifs_tcon *tcon;
25c7f41e
PS		 2711 struct tcon_link *tlink;
2712 struct sockaddr_storage addr;
2713 int rc = 0;
2714
2715 memset(&addr, 0, sizeof(struct sockaddr_storage));
2716
2717 spin_lock(&cifs_tcp_ses_lock);
2718 cifs_sb = CIFS_SB(sb);
2719 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2720 if (IS_ERR(tlink)) {
2721 spin_unlock(&cifs_tcp_ses_lock);
2722 return rc;
2723 }
2724 tcon = tlink_tcon(tlink);
2725 ses = tcon->ses;
2726 tcp_srv = ses->server;
2727
2728 volume_info = mnt_data->vol;
2729
2730 if (!volume_info->UNCip || !volume_info->UNC)
2731 goto out;
2732
2733 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
2734 volume_info->UNCip,
2735 strlen(volume_info->UNCip),
2736 volume_info->port);
2737 if (!rc)
2738 goto out;
2739
2740 if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) ||
2741 !match_session(ses, volume_info) ||
2742 !match_tcon(tcon, volume_info->UNC)) {
2743 rc = 0;
2744 goto out;
2745 }
2746
2747 rc = compare_mount_options(sb, mnt_data);
2748out:
25c7f41e 2749 spin_unlock(&cifs_tcp_ses_lock);
f484b5d0 2750 cifs_put_tlink(tlink);
25c7f41e
PS		 2751 return rc;
2752}
2753
1da177e4 2754int
b669f33c 2755get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2e6e02ab
PS		 2756 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2757 struct dfs_info3_param **referrals, int remap)
1da177e4
LT		 2758{
2759 char *temp_unc;
2760 int rc = 0;
2761
b669f33c 2762 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2e6e02ab
PS		 2763 return -ENOSYS;
2764
2765 *num_referrals = 0;
2766 *referrals = NULL;
1da177e4 2767
2e6e02ab 2768 if (ses->ipc_tid == 0) {
1da177e4 2769 temp_unc = kmalloc(2 /* for slashes */ +
2e6e02ab
PS		 2770 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2771 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
1da177e4
LT		 2772 if (temp_unc == NULL)
2773 return -ENOMEM;
2774 temp_unc[0] = '\\';
2775 temp_unc[1] = '\\';
2e6e02ab
PS		 2776 strcpy(temp_unc + 2, ses->serverName);
2777 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2778 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2779 nls_codepage);
2780 cFYI(1, "Tcon rc = %d ipc_tid = %d", rc, ses->ipc_tid);
1da177e4
LT		 2781 kfree(temp_unc);
2782 }
2783 if (rc == 0)
b669f33c
PS		 2784 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2785 referrals, num_referrals,
2786 nls_codepage, remap);
2e6e02ab
PS		 2787 /*
2788 * BB - map targetUNCs to dfs_info3 structures, here or in
b669f33c 2789 * ses->server->ops->get_dfs_refer.
2e6e02ab 2790 */
1da177e4
LT		 2791
2792 return rc;
2793}
2794
09e50d55
JL		 2795#ifdef CONFIG_DEBUG_LOCK_ALLOC
2796static struct lock_class_key cifs_key[2];
2797static struct lock_class_key cifs_slock_key[2];
2798
2799static inline void
2800cifs_reclassify_socket4(struct socket *sock)
2801{
2802 struct sock *sk = sock->sk;
2803 BUG_ON(sock_owned_by_user(sk));
2804 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2805 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2806}
2807
2808static inline void
2809cifs_reclassify_socket6(struct socket *sock)
2810{
2811 struct sock *sk = sock->sk;
2812 BUG_ON(sock_owned_by_user(sk));
2813 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2814 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2815}
2816#else
2817static inline void
2818cifs_reclassify_socket4(struct socket *sock)
2819{
2820}
2821
2822static inline void
2823cifs_reclassify_socket6(struct socket *sock)
2824{
2825}
2826#endif
2827
1da177e4 2828/* See RFC1001 section 14 on representation of Netbios names */
50c2f753 2829static void rfc1002mangle(char *target, char *source, unsigned int length)
1da177e4 2830{
50c2f753 2831 unsigned int i, j;
1da177e4 2832
50c2f753 2833 for (i = 0, j = 0; i < (length); i++) {
1da177e4
LT		 2834 /* mask a nibble at a time and encode */
2835 target[j] = 'A' + (0x0F & (source[i] >> 4));
2836 target[j+1] = 'A' + (0x0F & source[i]);
50c2f753 2837 j += 2;
1da177e4
LT		 2838 }
2839
2840}
2841
3eb9a889
BG		 2842static int
2843bind_socket(struct TCP_Server_Info *server)
2844{
2845 int rc = 0;
2846 if (server->srcaddr.ss_family != AF_UNSPEC) {
2847 /* Bind to the specified local IP address */
2848 struct socket *socket = server->ssocket;
2849 rc = socket->ops->bind(socket,
2850 (struct sockaddr *) &server->srcaddr,
2851 sizeof(server->srcaddr));
2852 if (rc < 0) {
2853 struct sockaddr_in *saddr4;
2854 struct sockaddr_in6 *saddr6;
2855 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2856 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2857 if (saddr6->sin6_family == AF_INET6)
2858 cERROR(1, "cifs: "
ac3aa2f8 2859 "Failed to bind to: %pI6c, error: %d",
3eb9a889
BG		 2860 &saddr6->sin6_addr, rc);
2861 else
2862 cERROR(1, "cifs: "
ac3aa2f8 2863 "Failed to bind to: %pI4, error: %d",
3eb9a889
BG		 2864 &saddr4->sin_addr.s_addr, rc);
2865 }
2866 }
2867 return rc;
2868}
1da177e4
LT		 2869
2870static int
a9f1b85e 2871ip_rfc1001_connect(struct TCP_Server_Info *server)
1da177e4
LT		 2872{
2873 int rc = 0;
a9f1b85e
PS		 2874 /*
2875 * some servers require RFC1001 sessinit before sending
2876 * negprot - BB check reconnection in case where second
2877 * sessinit is sent but no second negprot
2878 */
2879 struct rfc1002_session_packet *ses_init_buf;
2880 struct smb_hdr *smb_buf;
2881 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2882 GFP_KERNEL);
2883 if (ses_init_buf) {
2884 ses_init_buf->trailer.session_req.called_len = 32;
2885
2886 if (server->server_RFC1001_name &&
2887 server->server_RFC1001_name[0] != 0)
2888 rfc1002mangle(ses_init_buf->trailer.
2889 session_req.called_name,
2890 server->server_RFC1001_name,
2891 RFC1001_NAME_LEN_WITH_NULL);
2892 else
2893 rfc1002mangle(ses_init_buf->trailer.
2894 session_req.called_name,
2895 DEFAULT_CIFS_CALLED_NAME,
2896 RFC1001_NAME_LEN_WITH_NULL);
2897
2898 ses_init_buf->trailer.session_req.calling_len = 32;
2899
2900 /*
2901 * calling name ends in null (byte 16) from old smb
2902 * convention.
2903 */
2904 if (server->workstation_RFC1001_name &&
2905 server->workstation_RFC1001_name[0] != 0)
2906 rfc1002mangle(ses_init_buf->trailer.
2907 session_req.calling_name,
2908 server->workstation_RFC1001_name,
2909 RFC1001_NAME_LEN_WITH_NULL);
2910 else
2911 rfc1002mangle(ses_init_buf->trailer.
2912 session_req.calling_name,
2913 "LINUX_CIFS_CLNT",
2914 RFC1001_NAME_LEN_WITH_NULL);
2915
2916 ses_init_buf->trailer.session_req.scope1 = 0;
2917 ses_init_buf->trailer.session_req.scope2 = 0;
2918 smb_buf = (struct smb_hdr *)ses_init_buf;
2919
2920 /* sizeof RFC1002_SESSION_REQUEST with no scope */
be8e3b00 2921 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
a9f1b85e
PS		 2922 rc = smb_send(server, smb_buf, 0x44);
2923 kfree(ses_init_buf);
2924 /*
2925 * RFC1001 layer in at least one server
2926 * requires very short break before negprot
2927 * presumably because not expecting negprot
2928 * to follow so fast. This is a simple
2929 * solution that works without
2930 * complicating the code and causes no
2931 * significant slowing down on mount
2932 * for everyone else
2933 */
2934 usleep_range(1000, 2000);
2935 }
2936 /*
2937 * else the negprot may still work without this
2938 * even though malloc failed
2939 */
2940
2941 return rc;
2942}
2943
2944static int
2945generic_ip_connect(struct TCP_Server_Info *server)
2946{
2947 int rc = 0;
6da97910 2948 __be16 sport;
a9f1b85e 2949 int slen, sfamily;
bcf4b106 2950 struct socket *socket = server->ssocket;
a9f1b85e
PS		 2951 struct sockaddr *saddr;
2952
2953 saddr = (struct sockaddr *) &server->dstaddr;
2954
2955 if (server->dstaddr.ss_family == AF_INET6) {
2956 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2957 slen = sizeof(struct sockaddr_in6);
2958 sfamily = AF_INET6;
2959 } else {
2960 sport = ((struct sockaddr_in *) saddr)->sin_port;
2961 slen = sizeof(struct sockaddr_in);
2962 sfamily = AF_INET;
2963 }
1da177e4 2964
bcf4b106 2965 if (socket == NULL) {
f1d0c998
RL		 2966 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2967 IPPROTO_TCP, &socket, 1);
1da177e4 2968 if (rc < 0) {
b6b38f70 2969 cERROR(1, "Error %d creating socket", rc);
a9f1b85e 2970 server->ssocket = NULL;
1da177e4 2971 return rc;
1da177e4 2972 }
bcf4b106
JL		 2973
2974 /* BB other socket options to set KEEPALIVE, NODELAY? */
b6b38f70 2975 cFYI(1, "Socket created");
bcf4b106
JL		 2976 server->ssocket = socket;
2977 socket->sk->sk_allocation = GFP_NOFS;
a9f1b85e
PS		 2978 if (sfamily == AF_INET6)
2979 cifs_reclassify_socket6(socket);
2980 else
2981 cifs_reclassify_socket4(socket);
1da177e4
LT		 2982 }
2983
3eb9a889
BG		 2984 rc = bind_socket(server);
2985 if (rc < 0)
2986 return rc;
2987
bcf4b106
JL		 2988 /*
2989 * Eventually check for other socket options to change from
a9f1b85e
PS		 2990 * the default. sock_setsockopt not used because it expects
2991 * user space buffer
bcf4b106
JL		 2992 */
2993 socket->sk->sk_rcvtimeo = 7 * HZ;
da505c38 2994 socket->sk->sk_sndtimeo = 5 * HZ;
edf1ae40 2995
b387eaeb 2996 /* make the bufsizes depend on wsize/rsize and max requests */
bcf4b106
JL		 2997 if (server->noautotune) {
2998 if (socket->sk->sk_sndbuf < (200 * 1024))
2999 socket->sk->sk_sndbuf = 200 * 1024;
3000 if (socket->sk->sk_rcvbuf < (140 * 1024))
3001 socket->sk->sk_rcvbuf = 140 * 1024;
edf1ae40 3002 }
1da177e4 3003
6a5fa236 3004 if (server->tcp_nodelay) {
a9f1b85e 3005 int val = 1;
6a5fa236
SF		 3006 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
3007 (char *)&val, sizeof(val));
3008 if (rc)
b6b38f70 3009 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
6a5fa236
SF		 3010 }
3011
b6b38f70 3012 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
bcf4b106 3013 socket->sk->sk_sndbuf,
b6b38f70 3014 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
bcf4b106 3015
ee1b3ea9
JL		 3016 rc = socket->ops->connect(socket, saddr, slen, 0);
3017 if (rc < 0) {
3018 cFYI(1, "Error %d connecting to server", rc);
3019 sock_release(socket);
3020 server->ssocket = NULL;
3021 return rc;
3022 }
3023
a9f1b85e
PS		 3024 if (sport == htons(RFC1001_PORT))
3025 rc = ip_rfc1001_connect(server);
50c2f753 3026
1da177e4
LT		 3027 return rc;
3028}
3029
3030static int
a9f1b85e 3031ip_connect(struct TCP_Server_Info *server)
1da177e4 3032{
6da97910 3033 __be16 *sport;
a9f1b85e
PS		 3034 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3035 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
1da177e4 3036
a9f1b85e
PS		 3037 if (server->dstaddr.ss_family == AF_INET6)
3038 sport = &addr6->sin6_port;
3039 else
3040 sport = &addr->sin_port;
1da177e4 3041
a9f1b85e
PS		 3042 if (*sport == 0) {
3043 int rc;
1da177e4 3044
a9f1b85e
PS		 3045 /* try with 445 port at first */
3046 *sport = htons(CIFS_PORT);
3eb9a889 3047
a9f1b85e 3048 rc = generic_ip_connect(server);
1da177e4 3049 if (rc >= 0)
a9f1b85e 3050 return rc;
6a5fa236 3051
a9f1b85e
PS		 3052 /* if it failed, try with 139 port */
3053 *sport = htons(RFC1001_PORT);
6a5fa236
SF		 3054 }
3055
a9f1b85e 3056 return generic_ip_connect(server);
1da177e4
LT		 3057}
3058
6d5786a3 3059void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
2c6292ae 3060 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
8af18971
SF		 3061{
3062 /* if we are reconnecting then should we check to see if
3063 * any requested capabilities changed locally e.g. via
3064 * remount but we can not do much about it here
3065 * if they have (even if we could detect it by the following)
3066 * Perhaps we could add a backpointer to array of sb from tcon
3067 * or if we change to make all sb to same share the same
3068 * sb as NFS - then we only have one backpointer to sb.
3069 * What if we wanted to mount the server share twice once with
3070 * and once without posixacls or posix paths? */
3071 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
50c2f753 3072
c18c842b
SF		 3073 if (vol_info && vol_info->no_linux_ext) {
3074 tcon->fsUnixInfo.Capability = 0;
3075 tcon->unix_ext = 0; /* Unix Extensions disabled */
b6b38f70 3076 cFYI(1, "Linux protocol extensions disabled");
c18c842b
SF		 3077 return;
3078 } else if (vol_info)
3079 tcon->unix_ext = 1; /* Unix Extensions supported */
3080
3081 if (tcon->unix_ext == 0) {
b6b38f70 3082 cFYI(1, "Unix extensions disabled so not set on reconnect");
c18c842b
SF		 3083 return;
3084 }
50c2f753 3085
fb8c4b14 3086 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
8af18971 3087 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
6848b733 3088 cFYI(1, "unix caps which server supports %lld", cap);
8af18971
SF		 3089 /* check for reconnect case in which we do not
3090 want to change the mount behavior if we can avoid it */
fb8c4b14 3091 if (vol_info == NULL) {
50c2f753 3092 /* turn off POSIX ACL and PATHNAMES if not set
8af18971
SF		 3093 originally at mount time */
3094 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3095 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
11b6d645
IM		 3096 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3097 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
b6b38f70 3098 cERROR(1, "POSIXPATH support change");
8af18971 3099 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
11b6d645 3100 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
b6b38f70
JP		 3101 cERROR(1, "possible reconnect error");
3102 cERROR(1, "server disabled POSIX path support");
11b6d645 3103 }
8af18971 3104 }
50c2f753 3105
6848b733
SF		 3106 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3107 cERROR(1, "per-share encryption not supported yet");
3108
8af18971 3109 cap &= CIFS_UNIX_CAP_MASK;
75865f8c 3110 if (vol_info && vol_info->no_psx_acl)
8af18971 3111 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
75865f8c 3112 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
b6b38f70 3113 cFYI(1, "negotiated posix acl support");
2c6292ae
AV		 3114 if (cifs_sb)
3115 cifs_sb->mnt_cifs_flags |=
3116 CIFS_MOUNT_POSIXACL;
8af18971
SF		 3117 }
3118
75865f8c 3119 if (vol_info && vol_info->posix_paths == 0)
8af18971 3120 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
75865f8c 3121 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
b6b38f70 3122 cFYI(1, "negotiate posix pathnames");
2c6292ae
AV		 3123 if (cifs_sb)
3124 cifs_sb->mnt_cifs_flags |=
8af18971
SF		 3125 CIFS_MOUNT_POSIX_PATHS;
3126 }
50c2f753 3127
b6b38f70 3128 cFYI(1, "Negotiate caps 0x%x", (int)cap);
8af18971 3129#ifdef CONFIG_CIFS_DEBUG2
75865f8c 3130 if (cap & CIFS_UNIX_FCNTL_CAP)
b6b38f70 3131 cFYI(1, "FCNTL cap");
75865f8c 3132 if (cap & CIFS_UNIX_EXTATTR_CAP)
b6b38f70 3133 cFYI(1, "EXTATTR cap");
75865f8c 3134 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
b6b38f70 3135 cFYI(1, "POSIX path cap");
75865f8c 3136 if (cap & CIFS_UNIX_XATTR_CAP)
b6b38f70 3137 cFYI(1, "XATTR cap");
75865f8c 3138 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
b6b38f70 3139 cFYI(1, "POSIX ACL cap");
75865f8c 3140 if (cap & CIFS_UNIX_LARGE_READ_CAP)
b6b38f70 3141 cFYI(1, "very large read cap");
75865f8c 3142 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
b6b38f70 3143 cFYI(1, "very large write cap");
6848b733
SF		 3144 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
3145 cFYI(1, "transport encryption cap");
3146 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3147 cFYI(1, "mandatory transport encryption cap");
8af18971
SF		 3148#endif /* CIFS_DEBUG2 */
3149 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
442aa310 3150 if (vol_info == NULL) {
b6b38f70 3151 cFYI(1, "resetting capabilities failed");
442aa310 3152 } else
b6b38f70 3153 cERROR(1, "Negotiating Unix capabilities "
ac3aa2f8
JL		 3154 "with the server failed. Consider "
3155 "mounting with the Unix Extensions "
3156 "disabled if problems are found "
5a44b319 3157 "by specifying the nounix mount "
b6b38f70 3158 "option.");
5a44b319 3159
8af18971
SF		 3160 }
3161 }
3162}
3163
724d9f1c
PS		 3164void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3165 struct cifs_sb_info *cifs_sb)
b1c8d2b4 3166{
2de970ff
JL		 3167 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3168
2ced6f69
AV		 3169 spin_lock_init(&cifs_sb->tlink_tree_lock);
3170 cifs_sb->tlink_tree = RB_ROOT;
3171
25c7f41e 3172 /*
5eba8ab3
JL		 3173 * Temporarily set r/wsize for matching superblock. If we end up using
3174 * new sb then client will later negotiate it downward if needed.
25c7f41e 3175 */
5eba8ab3 3176 cifs_sb->rsize = pvolume_info->rsize;
25c7f41e
PS		 3177 cifs_sb->wsize = pvolume_info->wsize;
3178
3b795210
SF		 3179 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3180 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3181 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3182 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
5206efd6 3183 cFYI(1, "file mode: 0x%hx dir mode: 0x%hx",
b6b38f70 3184 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3b795210 3185
6d20e840 3186 cifs_sb->actimeo = pvolume_info->actimeo;
724d9f1c 3187 cifs_sb->local_nls = pvolume_info->local_nls;
6d20e840 3188
3b795210
SF		 3189 if (pvolume_info->noperm)
3190 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3191 if (pvolume_info->setuids)
3192 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3193 if (pvolume_info->server_ino)
3194 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3195 if (pvolume_info->remap)
3196 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3197 if (pvolume_info->no_xattr)
3198 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3199 if (pvolume_info->sfu_emul)
3200 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3201 if (pvolume_info->nobrl)
3202 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
be652445 3203 if (pvolume_info->nostrictsync)
4717bed6 3204 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
13a6e42a
SF		 3205 if (pvolume_info->mand_lock)
3206 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
d4ffff1f
PS		 3207 if (pvolume_info->rwpidforward)
3208 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3b795210
SF		 3209 if (pvolume_info->cifs_acl)
3210 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3c7c87fd 3211 if (pvolume_info->backupuid_specified) {
3d3ea8e6 3212 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3c7c87fd
SP		 3213 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3214 }
3215 if (pvolume_info->backupgid_specified) {
3d3ea8e6 3216 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3c7c87fd
SP		 3217 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3218 }
3b795210
SF		 3219 if (pvolume_info->override_uid)
3220 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3221 if (pvolume_info->override_gid)
3222 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3223 if (pvolume_info->dynperm)
3224 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
fa1df75d
SJ		 3225 if (pvolume_info->fsc)
3226 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
0eb8a132
JL		 3227 if (pvolume_info->multiuser)
3228 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3229 CIFS_MOUNT_NO_PERM);
d39454ff
PS		 3230 if (pvolume_info->strict_io)
3231 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3b795210 3232 if (pvolume_info->direct_io) {
b6b38f70 3233 cFYI(1, "mounting share using direct i/o");
3b795210
SF		 3234 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3235 }
736a3320
SM		 3236 if (pvolume_info->mfsymlinks) {
3237 if (pvolume_info->sfu_emul) {
3238 cERROR(1, "mount option mfsymlinks ignored if sfu "
3239 "mount option is used");
3240 } else {
3241 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3242 }
3243 }
3b795210
SF		 3244
3245 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
b6b38f70
JP		 3246 cERROR(1, "mount option dynperm ignored if cifsacl "
3247 "mount option supported");
b1c8d2b4
JL		 3248}
3249
b9bce2e9
JL		 3250static void
3251cleanup_volume_info_contents(struct smb_vol *volume_info)
1bfe73c2 3252{
b946845a 3253 kfree(volume_info->username);
1bfe73c2 3254 kzfree(volume_info->password);
13589c43
SF		 3255 if (volume_info->UNCip != volume_info->UNC + 2)
3256 kfree(volume_info->UNCip);
95c75454 3257 kfree(volume_info->UNC);
b946845a
SF		 3258 kfree(volume_info->domainname);
3259 kfree(volume_info->iocharset);
1bfe73c2 3260 kfree(volume_info->prepath);
b9bce2e9
JL		 3261}
3262
3263void
3264cifs_cleanup_volume_info(struct smb_vol *volume_info)
3265{
3266 if (!volume_info)
3267 return;
3268 cleanup_volume_info_contents(volume_info);
1bfe73c2 3269 kfree(volume_info);
1bfe73c2
IM		 3270}
3271
b9bce2e9 3272
2d6d589d 3273#ifdef CONFIG_CIFS_DFS_UPCALL
1bfe73c2
IM		 3274/* build_path_to_root returns full path to root when
3275 * we do not have an exiting connection (tcon) */
3276static char *
b2a0fa15 3277build_unc_path_to_root(const struct smb_vol *vol,
1bfe73c2
IM		 3278 const struct cifs_sb_info *cifs_sb)
3279{
b2a0fa15
JL		 3280 char *full_path, *pos;
3281 unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0;
3282 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
1bfe73c2 3283
b2a0fa15 3284 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
1bfe73c2
IM		 3285 if (full_path == NULL)
3286 return ERR_PTR(-ENOMEM);
3287
b2a0fa15
JL		 3288 strncpy(full_path, vol->UNC, unc_len);
3289 pos = full_path + unc_len;
3290
3291 if (pplen) {
3292 strncpy(pos, vol->prepath, pplen);
3293 pos += pplen;
3294 }
3295
3296 *pos = '\0'; /* add trailing null */
f87d39d9 3297 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
b2a0fa15 3298 cFYI(1, "%s: full_path=%s", __func__, full_path);
1bfe73c2
IM		 3299 return full_path;
3300}
dd613945
SF		 3301
3302/*
3303 * Perform a dfs referral query for a share and (optionally) prefix
3304 *
046462ab
SF		 3305 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3306 * to a string containing updated options for the submount. Otherwise it
3307 * will be left untouched.
dd613945
SF		 3308 *
3309 * Returns the rc from get_dfs_path to the caller, which can be used to
3310 * determine whether there were referrals.
3311 */
3312static int
b669f33c 3313expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
dd613945 3314 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
046462ab 3315 int check_prefix)
dd613945
SF		 3316{
3317 int rc;
3318 unsigned int num_referrals = 0;
3319 struct dfs_info3_param *referrals = NULL;
3320 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3321
3322 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3323 if (IS_ERR(full_path))
3324 return PTR_ERR(full_path);
3325
3326 /* For DFS paths, skip the first '\' of the UNC */
3327 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3328
b669f33c 3329 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
dd613945
SF		 3330 &num_referrals, &referrals,
3331 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3332
3333 if (!rc && num_referrals > 0) {
3334 char *fake_devname = NULL;
3335
3336 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3337 full_path + 1, referrals,
3338 &fake_devname);
3339
3340 free_dfs_info_array(referrals, num_referrals);
046462ab 3341
dd613945
SF		 3342 if (IS_ERR(mdata)) {
3343 rc = PTR_ERR(mdata);
3344 mdata = NULL;
b9bce2e9
JL		 3345 } else {
3346 cleanup_volume_info_contents(volume_info);
3347 memset(volume_info, '\0', sizeof(*volume_info));
3348 rc = cifs_setup_volume_info(volume_info, mdata,
3349 fake_devname);
dd613945 3350 }
b9bce2e9
JL		 3351 kfree(fake_devname);
3352 kfree(cifs_sb->mountdata);
046462ab 3353 cifs_sb->mountdata = mdata;
dd613945
SF		 3354 }
3355 kfree(full_path);
3356 return rc;
3357}
2d6d589d 3358#endif
1bfe73c2 3359
04db79b0
JL		 3360static int
3361cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3362 const char *devname)
1da177e4 3363{
724d9f1c 3364 int rc = 0;
1da177e4 3365
04db79b0
JL		 3366 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3367 return -EINVAL;
1da177e4 3368
23db65f5 3369
7586b765 3370 if (volume_info->nullauth) {
04febabc
JL		 3371 cFYI(1, "Anonymous login");
3372 kfree(volume_info->username);
3373 volume_info->username = NULL;
7586b765 3374 } else if (volume_info->username) {
1da177e4 3375 /* BB fixme parse for domain name here */
b6b38f70 3376 cFYI(1, "Username: %s", volume_info->username);
1da177e4 3377 } else {
bf820679 3378 cifserror("No username specified");
50c2f753
SF		 3379 /* In userspace mount helper we can get user name from alternate
3380 locations such as env variables and files on disk */
04db79b0 3381 return -EINVAL;
1da177e4
LT		 3382 }
3383
1da177e4 3384 /* this is needed for ASCII cp to Unicode converts */
7586b765 3385 if (volume_info->iocharset == NULL) {
a5fc4ce0
JL		 3386 /* load_nls_default cannot return null */
3387 volume_info->local_nls = load_nls_default();
1da177e4 3388 } else {
a5fc4ce0
JL		 3389 volume_info->local_nls = load_nls(volume_info->iocharset);
3390 if (volume_info->local_nls == NULL) {
b6b38f70
JP		 3391 cERROR(1, "CIFS mount error: iocharset %s not found",
3392 volume_info->iocharset);
04db79b0 3393 return -ELIBACC;
1da177e4
LT		 3394 }
3395 }
724d9f1c 3396
724d9f1c
PS		 3397 return rc;
3398}
3399
04db79b0
JL		 3400struct smb_vol *
3401cifs_get_volume_info(char *mount_data, const char *devname)
3402{
3403 int rc;
3404 struct smb_vol *volume_info;
3405
3406 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
3407 if (!volume_info)
3408 return ERR_PTR(-ENOMEM);
3409
3410 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3411 if (rc) {
3412 cifs_cleanup_volume_info(volume_info);
3413 volume_info = ERR_PTR(rc);
3414 }
3415
3416 return volume_info;
3417}
3418
724d9f1c 3419int
2c6292ae 3420cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
724d9f1c 3421{
1daaae8f 3422 int rc;
6d5786a3 3423 unsigned int xid;
af4281dc 3424 struct cifs_ses *ses;
96daf2b0 3425 struct cifs_tcon *tcon;
af4281dc 3426 struct TCP_Server_Info *server;
724d9f1c
PS		 3427 char *full_path;
3428 struct tcon_link *tlink;
3429#ifdef CONFIG_CIFS_DFS_UPCALL
3430 int referral_walks_count = 0;
20547490 3431#endif
dd854466
AV		 3432
3433 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3434 if (rc)
3435 return rc;
3436
20547490 3437#ifdef CONFIG_CIFS_DFS_UPCALL
724d9f1c
PS		 3438try_mount_again:
3439 /* cleanup activities if we're chasing a referral */
3440 if (referral_walks_count) {
3441 if (tcon)
3442 cifs_put_tcon(tcon);
af4281dc
PS		 3443 else if (ses)
3444 cifs_put_smb_ses(ses);
724d9f1c 3445
6d5786a3 3446 free_xid(xid);
724d9f1c
PS		 3447 }
3448#endif
1daaae8f 3449 rc = 0;
724d9f1c 3450 tcon = NULL;
af4281dc
PS		 3451 ses = NULL;
3452 server = NULL;
724d9f1c
PS		 3453 full_path = NULL;
3454 tlink = NULL;
3455
6d5786a3 3456 xid = get_xid();
1da177e4 3457
63c038c2 3458 /* get a reference to a tcp session */
af4281dc
PS		 3459 server = cifs_get_tcp_session(volume_info);
3460 if (IS_ERR(server)) {
3461 rc = PTR_ERR(server);
dd854466 3462 bdi_destroy(&cifs_sb->bdi);
63c038c2 3463 goto out;
1da177e4
LT		 3464 }
3465
36988c76 3466 /* get a reference to a SMB session */
af4281dc
PS		 3467 ses = cifs_get_smb_ses(server, volume_info);
3468 if (IS_ERR(ses)) {
3469 rc = PTR_ERR(ses);
3470 ses = NULL;
36988c76 3471 goto mount_fail_check;
1da177e4 3472 }
50c2f753 3473
d00c28de 3474 /* search for existing tcon to this server share */
af4281dc 3475 tcon = cifs_get_tcon(ses, volume_info);
d00c28de
JL		 3476 if (IS_ERR(tcon)) {
3477 rc = PTR_ERR(tcon);
3478 tcon = NULL;
1bfe73c2 3479 goto remote_path_check;
d00c28de 3480 }
1bfe73c2 3481
d82c2df5 3482 /* tell server which Unix caps we support */
29e20f9c 3483 if (cap_unix(tcon->ses)) {
d82c2df5
SF		 3484 /* reset of caps checks mount to see if unix extensions
3485 disabled for just this mount */
2c6292ae 3486 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
6848b733
SF		 3487 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3488 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3489 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3490 rc = -EACCES;
3491 goto mount_fail_check;
3492 }
3493 } else
d82c2df5 3494 tcon->unix_ext = 0; /* server does not support them */
c18c842b 3495
af4281dc
PS		 3496 /* do not care if a following call succeed - informational */
3497 if (!tcon->ipc && server->ops->qfs_tcon)
3498 server->ops->qfs_tcon(xid, tcon);
6848b733 3499
24985c53
PS		 3500 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3501 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
f7910cbd 3502
66bfaadc 3503 /* tune readahead according to rsize */
8f71465c 3504 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
f7910cbd 3505
1bfe73c2 3506remote_path_check:
c1508ca2
SF		 3507#ifdef CONFIG_CIFS_DFS_UPCALL
3508 /*
3509 * Perform an unconditional check for whether there are DFS
3510 * referrals for this path without prefix, to provide support
3511 * for DFS referrals from w2k8 servers which don't seem to respond
3512 * with PATH_NOT_COVERED to requests that include the prefix.
3513 * Chase the referral if found, otherwise continue normally.
3514 */
3515 if (referral_walks_count == 0) {
af4281dc
PS		 3516 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3517 false);
c1508ca2
SF		 3518 if (!refrc) {
3519 referral_walks_count++;
3520 goto try_mount_again;
3521 }
3522 }
3523#endif
3524
f87d39d9 3525 /* check if a whole path is not remote */
70945643 3526 if (!rc && tcon) {
68889f26
PS		 3527 if (!server->ops->is_path_accessible) {
3528 rc = -ENOSYS;
3529 goto mount_fail_check;
3530 }
e4cce94c 3531 /* build_path_to_root works only when we have a valid tcon */
9224dfc2 3532 full_path = build_path_to_root(volume_info, cifs_sb, tcon);
e4cce94c
IM		 3533 if (full_path == NULL) {
3534 rc = -ENOMEM;
3535 goto mount_fail_check;
3536 }
68889f26
PS		 3537 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3538 full_path);
03ceace5 3539 if (rc != 0 && rc != -EREMOTE) {
e4cce94c
IM		 3540 kfree(full_path);
3541 goto mount_fail_check;
3542 }
3543 kfree(full_path);
3544 }
3545
1bfe73c2
IM		 3546 /* get referral if needed */
3547 if (rc == -EREMOTE) {
d036f50f 3548#ifdef CONFIG_CIFS_DFS_UPCALL
5c2503a8
IM		 3549 if (referral_walks_count > MAX_NESTED_LINKS) {
3550 /*
3551 * BB: when we implement proper loop detection,
3552 * we will remove this check. But now we need it
3553 * to prevent an indefinite loop if 'DFS tree' is
3554 * misconfigured (i.e. has loops).
3555 */
3556 rc = -ELOOP;
3557 goto mount_fail_check;
3558 }
1bfe73c2 3559
af4281dc 3560 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
7b91e266 3561
dd613945 3562 if (!rc) {
5c2503a8 3563 referral_walks_count++;
1bfe73c2
IM		 3564 goto try_mount_again;
3565 }
dd613945 3566 goto mount_fail_check;
d036f50f
SF		 3567#else /* No DFS support, return error on mount */
3568 rc = -EOPNOTSUPP;
3569#endif
1bfe73c2
IM		 3570 }
3571
9d002df4
JL		 3572 if (rc)
3573 goto mount_fail_check;
3574
3575 /* now, hang the tcon off of the superblock */
3576 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3577 if (tlink == NULL) {
3578 rc = -ENOMEM;
3579 goto mount_fail_check;
3580 }
3581
af4281dc 3582 tlink->tl_uid = ses->linux_uid;
9d002df4
JL		 3583 tlink->tl_tcon = tcon;
3584 tlink->tl_time = jiffies;
3585 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3586 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3587
b647c35f 3588 cifs_sb->master_tlink = tlink;
9d002df4 3589 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 3590 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
9d002df4 3591 spin_unlock(&cifs_sb->tlink_tree_lock);
413e661c 3592
da472fc8 3593 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 3594 TLINK_IDLE_EXPIRE);
3595
1bfe73c2
IM		 3596mount_fail_check:
3597 /* on error free sesinfo and tcon struct if needed */
3598 if (rc) {
1bfe73c2 3599 /* If find_unc succeeded then rc == 0 so we can not end */
25985edc 3600 /* up accidentally freeing someone elses tcon struct */
1bfe73c2
IM		 3601 if (tcon)
3602 cifs_put_tcon(tcon);
af4281dc
PS		 3603 else if (ses)
3604 cifs_put_smb_ses(ses);
1bfe73c2 3605 else
af4281dc 3606 cifs_put_tcp_session(server);
dd854466 3607 bdi_destroy(&cifs_sb->bdi);
1bfe73c2
IM		 3608 }
3609
70fe7dc0 3610out:
6d5786a3 3611 free_xid(xid);
1da177e4
LT		 3612 return rc;
3613}
3614
8d1bca32
JL		 3615/*
3616 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3617 * pointer may be NULL.
3618 */
1da177e4 3619int
2e6e02ab 3620CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
96daf2b0 3621 const char *tree, struct cifs_tcon *tcon,
1da177e4
LT		 3622 const struct nls_table *nls_codepage)
3623{
3624 struct smb_hdr *smb_buffer;
3625 struct smb_hdr *smb_buffer_response;
3626 TCONX_REQ *pSMB;
3627 TCONX_RSP *pSMBr;
3628 unsigned char *bcc_ptr;
3629 int rc = 0;
690c522f
JL		 3630 int length;
3631 __u16 bytes_left, count;
1da177e4
LT		 3632
3633 if (ses == NULL)
3634 return -EIO;
3635
3636 smb_buffer = cifs_buf_get();
ca43e3be 3637 if (smb_buffer == NULL)
1da177e4 3638 return -ENOMEM;
ca43e3be 3639
1da177e4
LT		 3640 smb_buffer_response = smb_buffer;
3641
3642 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3643 NULL /*no tid */ , 4 /*wct */ );
1982c344 3644
88257360 3645 smb_buffer->Mid = get_next_mid(ses->server);
1da177e4
LT		 3646 smb_buffer->Uid = ses->Suid;
3647 pSMB = (TCONX_REQ *) smb_buffer;
3648 pSMBr = (TCONX_RSP *) smb_buffer_response;
3649
3650 pSMB->AndXCommand = 0xFF;
3651 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
1da177e4 3652 bcc_ptr = &pSMB->Password[0];
8d1bca32 3653 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
eeac8047 3654 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
7c7b25bc 3655 *bcc_ptr = 0; /* password is null byte */
eeac8047 3656 bcc_ptr++; /* skip password */
7c7b25bc 3657 /* already aligned so no need to do it below */
eeac8047 3658 } else {
540b2e37 3659 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
eeac8047
SF		 3660 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3661 specified as required (when that support is added to
3662 the vfs in the future) as only NTLM or the much
7c7b25bc 3663 weaker LANMAN (which we do not send by default) is accepted
eeac8047
SF		 3664 by Samba (not sure whether other servers allow
3665 NTLMv2 password here) */
7c7b25bc 3666#ifdef CONFIG_CIFS_WEAK_PW_HASH
04912d6a 3667 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
00e485b0 3668 (ses->server->secType == LANMAN))
d3ba50b1 3669 calc_lanman_hash(tcon->password, ses->server->cryptkey,
96daf2b0 3670 ses->server->sec_mode &
4e53a3fb
JL		 3671 SECMODE_PW_ENCRYPT ? true : false,
3672 bcc_ptr);
7c7b25bc
SF		 3673 else
3674#endif /* CIFS_WEAK_PW_HASH */
ee2c9258 3675 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
9ef5992e 3676 bcc_ptr, nls_codepage);
eeac8047 3677
540b2e37 3678 bcc_ptr += CIFS_AUTH_RESP_SIZE;
fb8c4b14 3679 if (ses->capabilities & CAP_UNICODE) {
7c7b25bc
SF		 3680 /* must align unicode strings */
3681 *bcc_ptr = 0; /* null byte password */
3682 bcc_ptr++;
3683 }
eeac8047 3684 }
1da177e4 3685
96daf2b0 3686 if (ses->server->sec_mode &
a878fb22 3687 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1da177e4
LT		 3688 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3689
3690 if (ses->capabilities & CAP_STATUS32) {
3691 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3692 }
3693 if (ses->capabilities & CAP_DFS) {
3694 smb_buffer->Flags2 |= SMBFLG2_DFS;
3695 }
3696 if (ses->capabilities & CAP_UNICODE) {
3697 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3698 length =
acbbb76a 3699 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
50c2f753 3700 6 /* max utf8 char length in bytes */ *
a878fb22
SF		 3701 (/* server len*/ + 256 /* share len */), nls_codepage);
3702 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
1da177e4
LT		 3703 bcc_ptr += 2; /* skip trailing null */
3704 } else { /* ASCII */
1da177e4
LT		 3705 strcpy(bcc_ptr, tree);
3706 bcc_ptr += strlen(tree) + 1;
3707 }
3708 strcpy(bcc_ptr, "?????");
3709 bcc_ptr += strlen("?????");
3710 bcc_ptr += 1;
3711 count = bcc_ptr - &pSMB->Password[0];
be8e3b00
SF		 3712 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3713 pSMB->hdr.smb_buf_length) + count);
1da177e4
LT		 3714 pSMB->ByteCount = cpu_to_le16(count);
3715
133672ef 3716 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
7749981e 3717 0);
1da177e4 3718
1da177e4
LT		 3719 /* above now done in SendReceive */
3720 if ((rc == 0) && (tcon != NULL)) {
0e0d2cf3
SF		 3721 bool is_unicode;
3722
1da177e4 3723 tcon->tidStatus = CifsGood;
3b795210 3724 tcon->need_reconnect = false;
1da177e4
LT		 3725 tcon->tid = smb_buffer_response->Tid;
3726 bcc_ptr = pByteArea(smb_buffer_response);
690c522f 3727 bytes_left = get_bcc(smb_buffer_response);
cc20c031 3728 length = strnlen(bcc_ptr, bytes_left - 2);
0e0d2cf3
SF		 3729 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3730 is_unicode = true;
3731 else
3732 is_unicode = false;
3733
cc20c031 3734
50c2f753 3735 /* skip service field (NB: this field is always ASCII) */
7f8ed420
SF		 3736 if (length == 3) {
3737 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3738 (bcc_ptr[2] == 'C')) {
b6b38f70 3739 cFYI(1, "IPC connection");
7f8ed420
SF		 3740 tcon->ipc = 1;
3741 }
3742 } else if (length == 2) {
3743 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3744 /* the most common case */
b6b38f70 3745 cFYI(1, "disk share connection");
7f8ed420
SF		 3746 }
3747 }
50c2f753 3748 bcc_ptr += length + 1;
cc20c031 3749 bytes_left -= (length + 1);
1da177e4 3750 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
cc20c031
JL		 3751
3752 /* mostly informational -- no need to fail on error here */
90a98b2f 3753 kfree(tcon->nativeFileSystem);
acbbb76a 3754 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
0e0d2cf3 3755 bytes_left, is_unicode,
cc20c031
JL		 3756 nls_codepage);
3757
b6b38f70 3758 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
cc20c031 3759
fb8c4b14 3760 if ((smb_buffer_response->WordCount == 3) ||
1a4e15a0
SF		 3761 (smb_buffer_response->WordCount == 7))
3762 /* field is in same location */
3979877e
SF		 3763 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3764 else
3765 tcon->Flags = 0;
b6b38f70 3766 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
1da177e4 3767 } else if ((rc == 0) && tcon == NULL) {
50c2f753 3768 /* all we need to save for IPC$ connection */
1da177e4
LT		 3769 ses->ipc_tid = smb_buffer_response->Tid;
3770 }
3771
a8a11d39 3772 cifs_buf_release(smb_buffer);
1da177e4
LT		 3773 return rc;
3774}
3775
2a9b9951
AV		 3776void
3777cifs_umount(struct cifs_sb_info *cifs_sb)
1da177e4 3778{
b647c35f
JL		 3779 struct rb_root *root = &cifs_sb->tlink_tree;
3780 struct rb_node *node;
3781 struct tcon_link *tlink;
9d002df4 3782
2de970ff
JL		 3783 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3784
b647c35f
JL		 3785 spin_lock(&cifs_sb->tlink_tree_lock);
3786 while ((node = rb_first(root))) {
3787 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3788 cifs_get_tlink(tlink);
3789 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3790 rb_erase(node, root);
1da177e4 3791
b647c35f
JL		 3792 spin_unlock(&cifs_sb->tlink_tree_lock);
3793 cifs_put_tlink(tlink);
3794 spin_lock(&cifs_sb->tlink_tree_lock);
3795 }
3796 spin_unlock(&cifs_sb->tlink_tree_lock);
50c2f753 3797
dd854466 3798 bdi_destroy(&cifs_sb->bdi);
d757d71b
AV		 3799 kfree(cifs_sb->mountdata);
3800 unload_nls(cifs_sb->local_nls);
3801 kfree(cifs_sb);
50c2f753 3802}
1da177e4 3803
286170aa
PS		 3804int
3805cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
1da177e4
LT		 3806{
3807 int rc = 0;
198b5682 3808 struct TCP_Server_Info *server = ses->server;
1da177e4 3809
286170aa
PS		 3810 if (!server->ops->need_neg || !server->ops->negotiate)
3811 return -ENOSYS;
3812
198b5682 3813 /* only send once per connect */
286170aa 3814 if (!server->ops->need_neg(server))
198b5682
JL		 3815 return 0;
3816
45275789 3817 set_credits(server, 1);
286170aa
PS		 3818
3819 rc = server->ops->negotiate(xid, ses);
198b5682
JL		 3820 if (rc == 0) {
3821 spin_lock(&GlobalMid_Lock);
7fdbaa1b 3822 if (server->tcpStatus == CifsNeedNegotiate)
198b5682
JL		 3823 server->tcpStatus = CifsGood;
3824 else
3825 rc = -EHOSTDOWN;
3826 spin_unlock(&GlobalMid_Lock);
198b5682
JL		 3827 }
3828
3829 return rc;
3830}
3831
58c45c58
PS		 3832int
3833cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3834 struct nls_table *nls_info)
198b5682 3835{
58c45c58 3836 int rc = -ENOSYS;
198b5682 3837 struct TCP_Server_Info *server = ses->server;
26b994fa 3838
198b5682
JL		 3839 ses->flags = 0;
3840 ses->capabilities = server->capabilities;
26b994fa 3841 if (linuxExtEnabled == 0)
29e20f9c 3842 ses->capabilities &= (~server->vals->cap_unix);
20418acd 3843
b6b38f70 3844 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
96daf2b0 3845 server->sec_mode, server->capabilities, server->timeAdj);
cb7691b6 3846
58c45c58
PS		 3847 if (server->ops->sess_setup)
3848 rc = server->ops->sess_setup(xid, ses, nls_info);
3849
26b994fa 3850 if (rc) {
b6b38f70 3851 cERROR(1, "Send error in SessSetup = %d", rc);
26b994fa 3852 } else {
5d0d2882
SP		 3853 mutex_lock(&ses->server->srv_mutex);
3854 if (!server->session_estab) {
21e73393 3855 server->session_key.response = ses->auth_key.response;
5d0d2882 3856 server->session_key.len = ses->auth_key.len;
21e73393
SP		 3857 server->sequence_number = 0x2;
3858 server->session_estab = true;
3859 ses->auth_key.response = NULL;
5d0d2882
SP		 3860 }
3861 mutex_unlock(&server->srv_mutex);
3862
b6b38f70 3863 cFYI(1, "CIFS Session Established successfully");
20418acd 3864 spin_lock(&GlobalMid_Lock);
198b5682
JL		 3865 ses->status = CifsGood;
3866 ses->need_reconnect = false;
20418acd 3867 spin_unlock(&GlobalMid_Lock);
1da177e4 3868 }
26b994fa 3869
21e73393
SP		 3870 kfree(ses->auth_key.response);
3871 ses->auth_key.response = NULL;
3872 ses->auth_key.len = 0;
d3686d54
SP		 3873 kfree(ses->ntlmssp);
3874 ses->ntlmssp = NULL;
21e73393 3875
1da177e4
LT		 3876 return rc;
3877}
3878
8a8798a5
JL		 3879static int
3880cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3881{
3882 switch (ses->server->secType) {
3883 case Kerberos:
3884 vol->secFlg = CIFSSEC_MUST_KRB5;
3885 return 0;
3886 case NTLMv2:
3887 vol->secFlg = CIFSSEC_MUST_NTLMV2;
3888 break;
3889 case NTLM:
3890 vol->secFlg = CIFSSEC_MUST_NTLM;
3891 break;
3892 case RawNTLMSSP:
3893 vol->secFlg = CIFSSEC_MUST_NTLMSSP;
3894 break;
3895 case LANMAN:
3896 vol->secFlg = CIFSSEC_MUST_LANMAN;
3897 break;
3898 }
3899
3900 return cifs_set_cifscreds(vol, ses);
3901}
3902
96daf2b0 3903static struct cifs_tcon *
9d002df4
JL		 3904cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid)
3905{
8a8798a5 3906 int rc;
96daf2b0
SF		 3907 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3908 struct cifs_ses *ses;
3909 struct cifs_tcon *tcon = NULL;
9d002df4 3910 struct smb_vol *vol_info;
9d002df4
JL		 3911
3912 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
803ab977
DC		 3913 if (vol_info == NULL)
3914 return ERR_PTR(-ENOMEM);
9d002df4 3915
9d002df4
JL		 3916 vol_info->local_nls = cifs_sb->local_nls;
3917 vol_info->linux_uid = fsuid;
3918 vol_info->cred_uid = fsuid;
3919 vol_info->UNC = master_tcon->treeName;
3920 vol_info->retry = master_tcon->retry;
3921 vol_info->nocase = master_tcon->nocase;
3922 vol_info->local_lease = master_tcon->local_lease;
3923 vol_info->no_linux_ext = !master_tcon->unix_ext;
3924
8a8798a5
JL		 3925 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3926 if (rc) {
3927 tcon = ERR_PTR(rc);
3928 goto out;
3929 }
9d002df4
JL		 3930
3931 /* get a reference for the same TCP session */
3f9bcca7 3932 spin_lock(&cifs_tcp_ses_lock);
9d002df4 3933 ++master_tcon->ses->server->srv_count;
3f9bcca7 3934 spin_unlock(&cifs_tcp_ses_lock);
9d002df4
JL		 3935
3936 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3937 if (IS_ERR(ses)) {
96daf2b0 3938 tcon = (struct cifs_tcon *)ses;
9d002df4
JL		 3939 cifs_put_tcp_session(master_tcon->ses->server);
3940 goto out;
3941 }
3942
3943 tcon = cifs_get_tcon(ses, vol_info);
3944 if (IS_ERR(tcon)) {
3945 cifs_put_smb_ses(ses);
3946 goto out;
3947 }
3948
29e20f9c 3949 if (cap_unix(ses))
9d002df4
JL		 3950 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3951out:
8a8798a5
JL		 3952 kfree(vol_info->username);
3953 kfree(vol_info->password);
9d002df4
JL		 3954 kfree(vol_info);
3955
3956 return tcon;
3957}
3958
96daf2b0 3959struct cifs_tcon *
9d002df4
JL		 3960cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3961{
3962 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3963}
3964
3965static int
3966cifs_sb_tcon_pending_wait(void *unused)
3967{
3968 schedule();
3969 return signal_pending(current) ? -ERESTARTSYS : 0;
3970}
3971
b647c35f
JL		 3972/* find and return a tlink with given uid */
3973static struct tcon_link *
3974tlink_rb_search(struct rb_root *root, uid_t uid)
3975{
3976 struct rb_node *node = root->rb_node;
3977 struct tcon_link *tlink;
3978
3979 while (node) {
3980 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3981
3982 if (tlink->tl_uid > uid)
3983 node = node->rb_left;
3984 else if (tlink->tl_uid < uid)
3985 node = node->rb_right;
3986 else
3987 return tlink;
3988 }
3989 return NULL;
3990}
3991
3992/* insert a tcon_link into the tree */
3993static void
3994tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3995{
3996 struct rb_node **new = &(root->rb_node), *parent = NULL;
3997 struct tcon_link *tlink;
3998
3999 while (*new) {
4000 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
4001 parent = *new;
4002
4003 if (tlink->tl_uid > new_tlink->tl_uid)
4004 new = &((*new)->rb_left);
4005 else
4006 new = &((*new)->rb_right);
4007 }
4008
4009 rb_link_node(&new_tlink->tl_rbnode, parent, new);
4010 rb_insert_color(&new_tlink->tl_rbnode, root);
4011}
4012
9d002df4
JL		 4013/*
4014 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
4015 * current task.
4016 *
4017 * If the superblock doesn't refer to a multiuser mount, then just return
4018 * the master tcon for the mount.
4019 *
6ef933a3 4020 * First, search the rbtree for an existing tcon for this fsuid. If one
9d002df4
JL		 4021 * exists, then check to see if it's pending construction. If it is then wait
4022 * for construction to complete. Once it's no longer pending, check to see if
4023 * it failed and either return an error or retry construction, depending on
4024 * the timeout.
4025 *
4026 * If one doesn't exist then insert a new tcon_link struct into the tree and
4027 * try to construct a new one.
4028 */
4029struct tcon_link *
4030cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4031{
4032 int ret;
b647c35f 4033 uid_t fsuid = current_fsuid();
9d002df4
JL		 4034 struct tcon_link *tlink, *newtlink;
4035
4036 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4037 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4038
4039 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 4040 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4041 if (tlink)
4042 cifs_get_tlink(tlink);
4043 spin_unlock(&cifs_sb->tlink_tree_lock);
4044
4045 if (tlink == NULL) {
4046 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4047 if (newtlink == NULL)
4048 return ERR_PTR(-ENOMEM);
b647c35f 4049 newtlink->tl_uid = fsuid;
9d002df4
JL		 4050 newtlink->tl_tcon = ERR_PTR(-EACCES);
4051 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4052 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4053 cifs_get_tlink(newtlink);
4054
9d002df4
JL		 4055 spin_lock(&cifs_sb->tlink_tree_lock);
4056 /* was one inserted after previous search? */
b647c35f 4057 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4058 if (tlink) {
4059 cifs_get_tlink(tlink);
4060 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4061 kfree(newtlink);
4062 goto wait_for_construction;
4063 }
9d002df4 4064 tlink = newtlink;
b647c35f
JL		 4065 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4066 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4067 } else {
4068wait_for_construction:
4069 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4070 cifs_sb_tcon_pending_wait,
4071 TASK_INTERRUPTIBLE);
4072 if (ret) {
4073 cifs_put_tlink(tlink);
4074 return ERR_PTR(ret);
4075 }
4076
4077 /* if it's good, return it */
4078 if (!IS_ERR(tlink->tl_tcon))
4079 return tlink;
4080
4081 /* return error if we tried this already recently */
4082 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4083 cifs_put_tlink(tlink);
4084 return ERR_PTR(-EACCES);
4085 }
4086
4087 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4088 goto wait_for_construction;
4089 }
4090
4091 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4092 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4093 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4094
4095 if (IS_ERR(tlink->tl_tcon)) {
4096 cifs_put_tlink(tlink);
4097 return ERR_PTR(-EACCES);
4098 }
4099
4100 return tlink;
4101}
2de970ff
JL		 4102
4103/*
4104 * periodic workqueue job that scans tcon_tree for a superblock and closes
4105 * out tcons.
4106 */
4107static void
4108cifs_prune_tlinks(struct work_struct *work)
4109{
4110 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4111 prune_tlinks.work);
b647c35f
JL		 4112 struct rb_root *root = &cifs_sb->tlink_tree;
4113 struct rb_node *node = rb_first(root);
4114 struct rb_node *tmp;
4115 struct tcon_link *tlink;
2de970ff 4116
b647c35f
JL		 4117 /*
4118 * Because we drop the spinlock in the loop in order to put the tlink
4119 * it's not guarded against removal of links from the tree. The only
4120 * places that remove entries from the tree are this function and
4121 * umounts. Because this function is non-reentrant and is canceled
4122 * before umount can proceed, this is safe.
4123 */
4124 spin_lock(&cifs_sb->tlink_tree_lock);
4125 node = rb_first(root);
4126 while (node != NULL) {
4127 tmp = node;
4128 node = rb_next(tmp);
4129 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4130
4131 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4132 atomic_read(&tlink->tl_count) != 0 ||
4133 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4134 continue;
2de970ff 4135
b647c35f
JL		 4136 cifs_get_tlink(tlink);
4137 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4138 rb_erase(tmp, root);
4139
4140 spin_unlock(&cifs_sb->tlink_tree_lock);
4141 cifs_put_tlink(tlink);
4142 spin_lock(&cifs_sb->tlink_tree_lock);
4143 }
4144 spin_unlock(&cifs_sb->tlink_tree_lock);
2de970ff 4145
da472fc8 4146 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 4147 TLINK_IDLE_EXPIRE);
4148}
Linux kernel - Deliverables
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