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Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
[mirror_ubuntu-artful-kernel.git] / fs / cifs / connect.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/cifs/connect.c
3 *
1080ef75 4 * Copyright (C) International Business Machines Corp., 2002,2011
1da177e4
LT		 5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
fb8c4b14 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1da177e4
LT		 20 */
21#include <linux/fs.h>
22#include <linux/net.h>
23#include <linux/string.h>
24#include <linux/list.h>
25#include <linux/wait.h>
5a0e3ad6 26#include <linux/slab.h>
1da177e4
LT		 27#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
b8643e1b 31#include <linux/delay.h>
f191401f 32#include <linux/completion.h>
aaf737ad 33#include <linux/kthread.h>
0ae0efad 34#include <linux/pagevec.h>
7dfb7103 35#include <linux/freezer.h>
5c2503a8 36#include <linux/namei.h>
1da177e4
LT		 37#include <asm/uaccess.h>
38#include <asm/processor.h>
50b64e3b 39#include <linux/inet.h>
143cb494 40#include <linux/module.h>
8a8798a5 41#include <keys/user-type.h>
0e2bedaa 42#include <net/ipv6.h>
8830d7e0
SP		 43#include <linux/parser.h>
44
1da177e4
LT		 45#include "cifspdu.h"
46#include "cifsglob.h"
47#include "cifsproto.h"
48#include "cifs_unicode.h"
49#include "cifs_debug.h"
50#include "cifs_fs_sb.h"
51#include "ntlmssp.h"
52#include "nterr.h"
53#include "rfc1002pdu.h"
488f1d2d 54#include "fscache.h"
1da177e4
LT		 55
56#define CIFS_PORT 445
57#define RFC1001_PORT 139
58
1da177e4
LT		 59extern mempool_t *cifs_req_poolp;
60
2de970ff 61/* FIXME: should these be tunable? */
9d002df4 62#define TLINK_ERROR_EXPIRE (1 * HZ)
2de970ff 63#define TLINK_IDLE_EXPIRE (600 * HZ)
9d002df4 64
8830d7e0
SP		 65enum {
66
67 /* Mount options that take no arguments */
68 Opt_user_xattr, Opt_nouser_xattr,
69 Opt_forceuid, Opt_noforceuid,
72bd481f 70 Opt_forcegid, Opt_noforcegid,
8830d7e0
SP		 71 Opt_noblocksend, Opt_noautotune,
72 Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
73 Opt_mapchars, Opt_nomapchars, Opt_sfu,
74 Opt_nosfu, Opt_nodfs, Opt_posixpaths,
75 Opt_noposixpaths, Opt_nounix,
76 Opt_nocase,
77 Opt_brl, Opt_nobrl,
78 Opt_forcemandatorylock, Opt_setuids,
79 Opt_nosetuids, Opt_dynperm, Opt_nodynperm,
80 Opt_nohard, Opt_nosoft,
81 Opt_nointr, Opt_intr,
82 Opt_nostrictsync, Opt_strictsync,
83 Opt_serverino, Opt_noserverino,
84 Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl,
85 Opt_acl, Opt_noacl, Opt_locallease,
1b359204 86 Opt_sign, Opt_seal, Opt_noac,
8830d7e0 87 Opt_fsc, Opt_mfsymlinks,
d8162558 88 Opt_multiuser, Opt_sloppy,
8830d7e0
SP		 89
90 /* Mount options which take numeric value */
91 Opt_backupuid, Opt_backupgid, Opt_uid,
92 Opt_cruid, Opt_gid, Opt_file_mode,
93 Opt_dirmode, Opt_port,
94 Opt_rsize, Opt_wsize, Opt_actimeo,
95
96 /* Mount options which take string value */
97 Opt_user, Opt_pass, Opt_ip,
98 Opt_unc, Opt_domain,
99 Opt_srcaddr, Opt_prefixpath,
25189643 100 Opt_iocharset,
8830d7e0 101 Opt_netbiosname, Opt_servern,
23db65f5 102 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
8830d7e0
SP		 103
104 /* Mount options to be ignored */
105 Opt_ignore,
106
107 /* Options which could be blank */
108 Opt_blank_pass,
4fe9e963
SP		 109 Opt_blank_user,
110 Opt_blank_ip,
8830d7e0
SP		 111
112 Opt_err
113};
114
115static const match_table_t cifs_mount_option_tokens = {
116
117 { Opt_user_xattr, "user_xattr" },
118 { Opt_nouser_xattr, "nouser_xattr" },
119 { Opt_forceuid, "forceuid" },
120 { Opt_noforceuid, "noforceuid" },
72bd481f
JL		 121 { Opt_forcegid, "forcegid" },
122 { Opt_noforcegid, "noforcegid" },
8830d7e0
SP		 123 { Opt_noblocksend, "noblocksend" },
124 { Opt_noautotune, "noautotune" },
125 { Opt_hard, "hard" },
126 { Opt_soft, "soft" },
127 { Opt_perm, "perm" },
128 { Opt_noperm, "noperm" },
129 { Opt_mapchars, "mapchars" },
130 { Opt_nomapchars, "nomapchars" },
131 { Opt_sfu, "sfu" },
132 { Opt_nosfu, "nosfu" },
133 { Opt_nodfs, "nodfs" },
134 { Opt_posixpaths, "posixpaths" },
135 { Opt_noposixpaths, "noposixpaths" },
136 { Opt_nounix, "nounix" },
137 { Opt_nounix, "nolinux" },
138 { Opt_nocase, "nocase" },
139 { Opt_nocase, "ignorecase" },
140 { Opt_brl, "brl" },
141 { Opt_nobrl, "nobrl" },
142 { Opt_nobrl, "nolock" },
143 { Opt_forcemandatorylock, "forcemandatorylock" },
5cfdddcf 144 { Opt_forcemandatorylock, "forcemand" },
8830d7e0
SP		 145 { Opt_setuids, "setuids" },
146 { Opt_nosetuids, "nosetuids" },
147 { Opt_dynperm, "dynperm" },
148 { Opt_nodynperm, "nodynperm" },
149 { Opt_nohard, "nohard" },
150 { Opt_nosoft, "nosoft" },
151 { Opt_nointr, "nointr" },
152 { Opt_intr, "intr" },
153 { Opt_nostrictsync, "nostrictsync" },
154 { Opt_strictsync, "strictsync" },
155 { Opt_serverino, "serverino" },
156 { Opt_noserverino, "noserverino" },
157 { Opt_rwpidforward, "rwpidforward" },
158 { Opt_cifsacl, "cifsacl" },
159 { Opt_nocifsacl, "nocifsacl" },
160 { Opt_acl, "acl" },
161 { Opt_noacl, "noacl" },
162 { Opt_locallease, "locallease" },
163 { Opt_sign, "sign" },
164 { Opt_seal, "seal" },
8830d7e0
SP		 165 { Opt_noac, "noac" },
166 { Opt_fsc, "fsc" },
167 { Opt_mfsymlinks, "mfsymlinks" },
168 { Opt_multiuser, "multiuser" },
d8162558 169 { Opt_sloppy, "sloppy" },
8830d7e0
SP		 170
171 { Opt_backupuid, "backupuid=%s" },
172 { Opt_backupgid, "backupgid=%s" },
173 { Opt_uid, "uid=%s" },
174 { Opt_cruid, "cruid=%s" },
175 { Opt_gid, "gid=%s" },
176 { Opt_file_mode, "file_mode=%s" },
177 { Opt_dirmode, "dirmode=%s" },
178 { Opt_dirmode, "dir_mode=%s" },
179 { Opt_port, "port=%s" },
180 { Opt_rsize, "rsize=%s" },
181 { Opt_wsize, "wsize=%s" },
182 { Opt_actimeo, "actimeo=%s" },
183
4fe9e963
SP		 184 { Opt_blank_user, "user=" },
185 { Opt_blank_user, "username=" },
8830d7e0
SP		 186 { Opt_user, "user=%s" },
187 { Opt_user, "username=%s" },
188 { Opt_blank_pass, "pass=" },
3c15b4cf 189 { Opt_blank_pass, "password=" },
8830d7e0
SP		 190 { Opt_pass, "pass=%s" },
191 { Opt_pass, "password=%s" },
4fe9e963
SP		 192 { Opt_blank_ip, "ip=" },
193 { Opt_blank_ip, "addr=" },
8830d7e0
SP		 194 { Opt_ip, "ip=%s" },
195 { Opt_ip, "addr=%s" },
196 { Opt_unc, "unc=%s" },
197 { Opt_unc, "target=%s" },
198 { Opt_unc, "path=%s" },
199 { Opt_domain, "dom=%s" },
200 { Opt_domain, "domain=%s" },
201 { Opt_domain, "workgroup=%s" },
202 { Opt_srcaddr, "srcaddr=%s" },
203 { Opt_prefixpath, "prefixpath=%s" },
204 { Opt_iocharset, "iocharset=%s" },
8830d7e0
SP		 205 { Opt_netbiosname, "netbiosname=%s" },
206 { Opt_servern, "servern=%s" },
207 { Opt_ver, "ver=%s" },
23db65f5 208 { Opt_vers, "vers=%s" },
8830d7e0 209 { Opt_sec, "sec=%s" },
15b6a473 210 { Opt_cache, "cache=%s" },
8830d7e0
SP		 211
212 { Opt_ignore, "cred" },
213 { Opt_ignore, "credentials" },
a557b976
JL		 214 { Opt_ignore, "cred=%s" },
215 { Opt_ignore, "credentials=%s" },
8830d7e0
SP		 216 { Opt_ignore, "guest" },
217 { Opt_ignore, "rw" },
218 { Opt_ignore, "ro" },
219 { Opt_ignore, "suid" },
220 { Opt_ignore, "nosuid" },
221 { Opt_ignore, "exec" },
222 { Opt_ignore, "noexec" },
223 { Opt_ignore, "nodev" },
224 { Opt_ignore, "noauto" },
225 { Opt_ignore, "dev" },
226 { Opt_ignore, "mand" },
227 { Opt_ignore, "nomand" },
228 { Opt_ignore, "_netdev" },
229
230 { Opt_err, NULL }
231};
232
233enum {
234 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
235 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
7659624f
JL		 236 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
237 Opt_sec_ntlmv2i, Opt_sec_lanman,
8830d7e0
SP		 238 Opt_sec_none,
239
240 Opt_sec_err
241};
242
243static const match_table_t cifs_secflavor_tokens = {
244 { Opt_sec_krb5, "krb5" },
245 { Opt_sec_krb5i, "krb5i" },
246 { Opt_sec_krb5p, "krb5p" },
247 { Opt_sec_ntlmsspi, "ntlmsspi" },
248 { Opt_sec_ntlmssp, "ntlmssp" },
249 { Opt_ntlm, "ntlm" },
250 { Opt_sec_ntlmi, "ntlmi" },
7659624f
JL		 251 { Opt_sec_ntlmv2, "nontlm" },
252 { Opt_sec_ntlmv2, "ntlmv2" },
8830d7e0 253 { Opt_sec_ntlmv2i, "ntlmv2i" },
8830d7e0
SP		 254 { Opt_sec_lanman, "lanman" },
255 { Opt_sec_none, "none" },
256
257 { Opt_sec_err, NULL }
258};
259
15b6a473
JL		 260/* cache flavors */
261enum {
262 Opt_cache_loose,
263 Opt_cache_strict,
264 Opt_cache_none,
265 Opt_cache_err
266};
267
268static const match_table_t cifs_cacheflavor_tokens = {
269 { Opt_cache_loose, "loose" },
270 { Opt_cache_strict, "strict" },
271 { Opt_cache_none, "none" },
272 { Opt_cache_err, NULL }
273};
274
23db65f5
JL		 275static const match_table_t cifs_smb_version_tokens = {
276 { Smb_1, SMB1_VERSION_STRING },
dd446b16 277 { Smb_20, SMB20_VERSION_STRING},
1080ef75 278 { Smb_21, SMB21_VERSION_STRING },
e4aa25e7 279 { Smb_30, SMB30_VERSION_STRING },
23db65f5
JL		 280};
281
a9f1b85e
PS		 282static int ip_connect(struct TCP_Server_Info *server);
283static int generic_ip_connect(struct TCP_Server_Info *server);
b647c35f 284static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
2de970ff 285static void cifs_prune_tlinks(struct work_struct *work);
b9bce2e9
JL		 286static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
287 const char *devname);
1da177e4 288
d5c5605c
JL		 289/*
290 * cifs tcp session reconnection
291 *
292 * mark tcp session as reconnecting so temporarily locked
293 * mark all smb sessions as reconnecting for tcp session
294 * reconnect tcp session
295 * wake up waiters on reconnection? - (not needed currently)
296 */
28ea5290 297int
1da177e4
LT		 298cifs_reconnect(struct TCP_Server_Info *server)
299{
300 int rc = 0;
f1987b44 301 struct list_head *tmp, *tmp2;
96daf2b0
SF		 302 struct cifs_ses *ses;
303 struct cifs_tcon *tcon;
fb8c4b14 304 struct mid_q_entry *mid_entry;
3c1105df 305 struct list_head retry_list;
50c2f753 306
1da177e4 307 spin_lock(&GlobalMid_Lock);
469ee614 308 if (server->tcpStatus == CifsExiting) {
fb8c4b14 309 /* the demux thread will exit normally
1da177e4
LT		 310 next time through the loop */
311 spin_unlock(&GlobalMid_Lock);
312 return rc;
313 } else
314 server->tcpStatus = CifsNeedReconnect;
315 spin_unlock(&GlobalMid_Lock);
316 server->maxBuf = 0;
aa24d1e9
PS		 317#ifdef CONFIG_CIFS_SMB2
318 server->max_read = 0;
319#endif
1da177e4 320
b6b38f70 321 cFYI(1, "Reconnecting tcp session");
1da177e4
LT		 322
323 /* before reconnecting the tcp session, mark the smb session (uid)
324 and the tid bad so they are not used until reconnected */
2b84a36c 325 cFYI(1, "%s: marking sessions and tcons for reconnect", __func__);
3f9bcca7 326 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 327 list_for_each(tmp, &server->smb_ses_list) {
96daf2b0 328 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
14fbf50d
JL		 329 ses->need_reconnect = true;
330 ses->ipc_tid = 0;
f1987b44 331 list_for_each(tmp2, &ses->tcon_list) {
96daf2b0 332 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
3b795210 333 tcon->need_reconnect = true;
1da177e4 334 }
1da177e4 335 }
3f9bcca7 336 spin_unlock(&cifs_tcp_ses_lock);
2b84a36c 337
1da177e4 338 /* do not want to be sending data on a socket we are freeing */
2b84a36c 339 cFYI(1, "%s: tearing down socket", __func__);
72ca545b 340 mutex_lock(&server->srv_mutex);
fb8c4b14 341 if (server->ssocket) {
b6b38f70
JP		 342 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
343 server->ssocket->flags);
91cf45f0 344 kernel_sock_shutdown(server->ssocket, SHUT_WR);
b6b38f70 345 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
467a8f8d 346 server->ssocket->state,
b6b38f70 347 server->ssocket->flags);
1da177e4
LT		 348 sock_release(server->ssocket);
349 server->ssocket = NULL;
350 }
5d0d2882
SP		 351 server->sequence_number = 0;
352 server->session_estab = false;
21e73393
SP		 353 kfree(server->session_key.response);
354 server->session_key.response = NULL;
355 server->session_key.len = 0;
fda35943 356 server->lstrp = jiffies;
2b84a36c 357 mutex_unlock(&server->srv_mutex);
1da177e4 358
2b84a36c 359 /* mark submitted MIDs for retry and issue callback */
3c1105df
JL		 360 INIT_LIST_HEAD(&retry_list);
361 cFYI(1, "%s: moving mids to private list", __func__);
1da177e4 362 spin_lock(&GlobalMid_Lock);
2b84a36c
JL		 363 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
364 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1
PS		 365 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
366 mid_entry->mid_state = MID_RETRY_NEEDED;
3c1105df
JL		 367 list_move(&mid_entry->qhead, &retry_list);
368 }
369 spin_unlock(&GlobalMid_Lock);
370
371 cFYI(1, "%s: issuing mid callbacks", __func__);
372 list_for_each_safe(tmp, tmp2, &retry_list) {
373 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
2b84a36c
JL		 374 list_del_init(&mid_entry->qhead);
375 mid_entry->callback(mid_entry);
1da177e4 376 }
1da177e4 377
7fdbaa1b 378 do {
6c3d8909 379 try_to_freeze();
a9f1b85e
PS		 380
381 /* we should try only the port we connected to before */
382 rc = generic_ip_connect(server);
fb8c4b14 383 if (rc) {
b6b38f70 384 cFYI(1, "reconnect error %d", rc);
0cb766ae 385 msleep(3000);
1da177e4
LT		 386 } else {
387 atomic_inc(&tcpSesReconnectCount);
388 spin_lock(&GlobalMid_Lock);
469ee614 389 if (server->tcpStatus != CifsExiting)
fd88ce93 390 server->tcpStatus = CifsNeedNegotiate;
fb8c4b14 391 spin_unlock(&GlobalMid_Lock);
1da177e4 392 }
7fdbaa1b 393 } while (server->tcpStatus == CifsNeedReconnect);
2b84a36c 394
1da177e4
LT		 395 return rc;
396}
397
c74093b6
JL		 398static void
399cifs_echo_request(struct work_struct *work)
400{
401 int rc;
402 struct TCP_Server_Info *server = container_of(work,
403 struct TCP_Server_Info, echo.work);
404
247ec9b4 405 /*
f6d76178
PS		 406 * We cannot send an echo if it is disabled or until the
407 * NEGOTIATE_PROTOCOL request is done, which is indicated by
408 * server->ops->need_neg() == true. Also, no need to ping if
409 * we got a response recently.
247ec9b4 410 */
286170aa 411 if (!server->ops->need_neg || server->ops->need_neg(server) ||
f6d76178 412 (server->ops->can_echo && !server->ops->can_echo(server)) ||
247ec9b4 413 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
c74093b6
JL		 414 goto requeue_echo;
415
f6d76178 416 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
c74093b6
JL		 417 if (rc)
418 cFYI(1, "Unable to send echo request to server: %s",
419 server->hostname);
420
421requeue_echo:
da472fc8 422 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
c74093b6
JL		 423}
424
3d9c2472 425static bool
2a37ef94 426allocate_buffers(struct TCP_Server_Info *server)
3d9c2472 427{
2a37ef94
JL		 428 if (!server->bigbuf) {
429 server->bigbuf = (char *)cifs_buf_get();
430 if (!server->bigbuf) {
3d9c2472
PS		 431 cERROR(1, "No memory for large SMB response");
432 msleep(3000);
433 /* retry will check if exiting */
434 return false;
435 }
2a37ef94 436 } else if (server->large_buf) {
3d9c2472 437 /* we are reusing a dirty large buf, clear its start */
1887f601 438 memset(server->bigbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 439 }
440
2a37ef94
JL		 441 if (!server->smallbuf) {
442 server->smallbuf = (char *)cifs_small_buf_get();
443 if (!server->smallbuf) {
3d9c2472
PS		 444 cERROR(1, "No memory for SMB response");
445 msleep(1000);
446 /* retry will check if exiting */
447 return false;
448 }
449 /* beginning of smb buffer is cleared in our buf_get */
450 } else {
451 /* if existing small buf clear beginning */
1887f601 452 memset(server->smallbuf, 0, HEADER_SIZE(server));
3d9c2472
PS		 453 }
454
3d9c2472
PS		 455 return true;
456}
457
ba749e6d
JL		 458static bool
459server_unresponsive(struct TCP_Server_Info *server)
460{
6dae51a5
PS		 461 /*
462 * We need to wait 2 echo intervals to make sure we handle such
463 * situations right:
464 * 1s client sends a normal SMB request
465 * 2s client gets a response
466 * 30s echo workqueue job pops, and decides we got a response recently
467 * and don't need to send another
468 * ...
469 * 65s kernel_recvmsg times out, and we see that we haven't gotten
470 * a response in >60s.
471 */
472 if (server->tcpStatus == CifsGood &&
473 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
ba749e6d
JL		 474 cERROR(1, "Server %s has not responded in %d seconds. "
475 "Reconnecting...", server->hostname,
6dae51a5 476 (2 * SMB_ECHO_INTERVAL) / HZ);
ba749e6d
JL		 477 cifs_reconnect(server);
478 wake_up(&server->response_q);
479 return true;
480 }
481
482 return false;
483}
484
42c4dfc2
JL		 485/*
486 * kvec_array_init - clone a kvec array, and advance into it
487 * @new: pointer to memory for cloned array
488 * @iov: pointer to original array
489 * @nr_segs: number of members in original array
490 * @bytes: number of bytes to advance into the cloned array
491 *
492 * This function will copy the array provided in iov to a section of memory
493 * and advance the specified number of bytes into the new array. It returns
494 * the number of segments in the new array. "new" must be at least as big as
495 * the original iov array.
496 */
497static unsigned int
498kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
499 size_t bytes)
500{
501 size_t base = 0;
502
503 while (bytes || !iov->iov_len) {
504 int copy = min(bytes, iov->iov_len);
505
506 bytes -= copy;
507 base += copy;
508 if (iov->iov_len == base) {
509 iov++;
510 nr_segs--;
511 base = 0;
512 }
513 }
514 memcpy(new, iov, sizeof(*iov) * nr_segs);
515 new->iov_base += base;
516 new->iov_len -= base;
517 return nr_segs;
518}
519
1041e3f9
JL		 520static struct kvec *
521get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
e7015fb1 522{
1041e3f9
JL		 523 struct kvec *new_iov;
524
525 if (server->iov && nr_segs <= server->nr_iov)
526 return server->iov;
527
528 /* not big enough -- allocate a new one and release the old */
529 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
530 if (new_iov) {
531 kfree(server->iov);
532 server->iov = new_iov;
533 server->nr_iov = nr_segs;
534 }
535 return new_iov;
536}
537
e28bc5b1
JL		 538int
539cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
540 unsigned int nr_segs, unsigned int to_read)
e7015fb1 541{
a52c1eb7
JL		 542 int length = 0;
543 int total_read;
42c4dfc2 544 unsigned int segs;
e831e6cf 545 struct msghdr smb_msg;
42c4dfc2
JL		 546 struct kvec *iov;
547
1041e3f9 548 iov = get_server_iovec(server, nr_segs);
42c4dfc2
JL		 549 if (!iov)
550 return -ENOMEM;
e7015fb1 551
e831e6cf
JL		 552 smb_msg.msg_control = NULL;
553 smb_msg.msg_controllen = 0;
554
a52c1eb7 555 for (total_read = 0; to_read; total_read += length, to_read -= length) {
95edcff4
JL		 556 try_to_freeze();
557
ba749e6d 558 if (server_unresponsive(server)) {
a52c1eb7 559 total_read = -EAGAIN;
ba749e6d
JL		 560 break;
561 }
562
42c4dfc2
JL		 563 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
564
565 length = kernel_recvmsg(server->ssocket, &smb_msg,
566 iov, segs, to_read, 0);
e7015fb1 567
e7015fb1 568 if (server->tcpStatus == CifsExiting) {
a52c1eb7 569 total_read = -ESHUTDOWN;
e7015fb1
PS		 570 break;
571 } else if (server->tcpStatus == CifsNeedReconnect) {
572 cifs_reconnect(server);
a52c1eb7 573 total_read = -EAGAIN;
e7015fb1
PS		 574 break;
575 } else if (length == -ERESTARTSYS ||
576 length == -EAGAIN ||
577 length == -EINTR) {
578 /*
579 * Minimum sleep to prevent looping, allowing socket
580 * to clear and app threads to set tcpStatus
581 * CifsNeedReconnect if server hung.
582 */
583 usleep_range(1000, 2000);
584 length = 0;
a52c1eb7 585 continue;
e7015fb1 586 } else if (length <= 0) {
a52c1eb7
JL		 587 cFYI(1, "Received no data or error: expecting %d "
588 "got %d", to_read, length);
e7015fb1 589 cifs_reconnect(server);
a52c1eb7 590 total_read = -EAGAIN;
e7015fb1
PS		 591 break;
592 }
593 }
a52c1eb7 594 return total_read;
e7015fb1 595}
e7015fb1 596
e28bc5b1
JL		 597int
598cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
599 unsigned int to_read)
42c4dfc2
JL		 600{
601 struct kvec iov;
602
603 iov.iov_base = buf;
604 iov.iov_len = to_read;
605
e28bc5b1 606 return cifs_readv_from_socket(server, &iov, 1, to_read);
e7015fb1
PS		 607}
608
98bac62c 609static bool
fe11e4cc 610is_smb_response(struct TCP_Server_Info *server, unsigned char type)
98bac62c 611{
98bac62c
PS		 612 /*
613 * The first byte big endian of the length field,
614 * is actually not part of the length but the type
615 * with the most common, zero, as regular data.
616 */
fe11e4cc
JL		 617 switch (type) {
618 case RFC1002_SESSION_MESSAGE:
619 /* Regular SMB response */
620 return true;
621 case RFC1002_SESSION_KEEP_ALIVE:
622 cFYI(1, "RFC 1002 session keep alive");
623 break;
624 case RFC1002_POSITIVE_SESSION_RESPONSE:
625 cFYI(1, "RFC 1002 positive session response");
626 break;
627 case RFC1002_NEGATIVE_SESSION_RESPONSE:
98bac62c
PS		 628 /*
629 * We get this from Windows 98 instead of an error on
630 * SMB negprot response.
631 */
fe11e4cc 632 cFYI(1, "RFC 1002 negative session response");
98bac62c
PS		 633 /* give server a second to clean up */
634 msleep(1000);
635 /*
636 * Always try 445 first on reconnect since we get NACK
637 * on some if we ever connected to port 139 (the NACK
638 * is since we do not begin with RFC1001 session
639 * initialize frame).
640 */
fe11e4cc 641 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
98bac62c
PS		 642 cifs_reconnect(server);
643 wake_up(&server->response_q);
fe11e4cc
JL		 644 break;
645 default:
646 cERROR(1, "RFC 1002 unknown response type 0x%x", type);
98bac62c 647 cifs_reconnect(server);
98bac62c
PS		 648 }
649
fe11e4cc 650 return false;
98bac62c
PS		 651}
652
e28bc5b1
JL		 653void
654dequeue_mid(struct mid_q_entry *mid, bool malformed)
ea1f4502 655{
ad69bae1 656#ifdef CONFIG_CIFS_STATS2
ea1f4502 657 mid->when_received = jiffies;
ad69bae1 658#endif
ea1f4502
JL		 659 spin_lock(&GlobalMid_Lock);
660 if (!malformed)
7c9421e1 661 mid->mid_state = MID_RESPONSE_RECEIVED;
ea1f4502 662 else
7c9421e1 663 mid->mid_state = MID_RESPONSE_MALFORMED;
ea1f4502 664 list_del_init(&mid->qhead);
ad69bae1 665 spin_unlock(&GlobalMid_Lock);
ea1f4502 666}
ad69bae1 667
c8054ebd
JL		 668static void
669handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
d4e4854f 670 char *buf, int malformed)
ea1f4502 671{
316cf94a
PS		 672 if (server->ops->check_trans2 &&
673 server->ops->check_trans2(mid, server, buf, malformed))
c8054ebd 674 return;
ea1f4502 675 mid->resp_buf = buf;
7c9421e1 676 mid->large_buf = server->large_buf;
2a37ef94
JL		 677 /* Was previous buf put in mpx struct for multi-rsp? */
678 if (!mid->multiRsp) {
679 /* smb buffer will be freed by user thread */
680 if (server->large_buf)
681 server->bigbuf = NULL;
682 else
683 server->smallbuf = NULL;
684 }
ffc00e27 685 dequeue_mid(mid, malformed);
ad69bae1
PS		 686}
687
762dfd10
PS		 688static void clean_demultiplex_info(struct TCP_Server_Info *server)
689{
690 int length;
691
692 /* take it off the list, if it's not already */
693 spin_lock(&cifs_tcp_ses_lock);
694 list_del_init(&server->tcp_ses_list);
695 spin_unlock(&cifs_tcp_ses_lock);
696
697 spin_lock(&GlobalMid_Lock);
698 server->tcpStatus = CifsExiting;
699 spin_unlock(&GlobalMid_Lock);
700 wake_up_all(&server->response_q);
701
2d86dbc9 702 /* check if we have blocked requests that need to free */
fc40f9cf 703 spin_lock(&server->req_lock);
2d86dbc9
PS		 704 if (server->credits <= 0)
705 server->credits = 1;
fc40f9cf 706 spin_unlock(&server->req_lock);
762dfd10
PS		 707 /*
708 * Although there should not be any requests blocked on this queue it
709 * can not hurt to be paranoid and try to wake up requests that may
710 * haven been blocked when more than 50 at time were on the wire to the
711 * same server - they now will see the session is in exit state and get
712 * out of SendReceive.
713 */
714 wake_up_all(&server->request_q);
715 /* give those requests time to exit */
716 msleep(125);
717
718 if (server->ssocket) {
719 sock_release(server->ssocket);
720 server->ssocket = NULL;
721 }
722
723 if (!list_empty(&server->pending_mid_q)) {
724 struct list_head dispose_list;
725 struct mid_q_entry *mid_entry;
726 struct list_head *tmp, *tmp2;
727
728 INIT_LIST_HEAD(&dispose_list);
729 spin_lock(&GlobalMid_Lock);
730 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
731 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1
PS		 732 cFYI(1, "Clearing mid 0x%llx", mid_entry->mid);
733 mid_entry->mid_state = MID_SHUTDOWN;
762dfd10
PS		 734 list_move(&mid_entry->qhead, &dispose_list);
735 }
736 spin_unlock(&GlobalMid_Lock);
737
738 /* now walk dispose list and issue callbacks */
739 list_for_each_safe(tmp, tmp2, &dispose_list) {
740 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
7c9421e1 741 cFYI(1, "Callback mid 0x%llx", mid_entry->mid);
762dfd10
PS		 742 list_del_init(&mid_entry->qhead);
743 mid_entry->callback(mid_entry);
744 }
745 /* 1/8th of sec is more than enough time for them to exit */
746 msleep(125);
747 }
748
749 if (!list_empty(&server->pending_mid_q)) {
750 /*
751 * mpx threads have not exited yet give them at least the smb
752 * send timeout time for long ops.
753 *
754 * Due to delays on oplock break requests, we need to wait at
755 * least 45 seconds before giving up on a request getting a
756 * response and going ahead and killing cifsd.
757 */
758 cFYI(1, "Wait for exit from demultiplex thread");
759 msleep(46000);
760 /*
761 * If threads still have not exited they are probably never
762 * coming home not much else we can do but free the memory.
763 */
764 }
765
766 kfree(server->hostname);
1041e3f9 767 kfree(server->iov);
762dfd10
PS		 768 kfree(server);
769
770 length = atomic_dec_return(&tcpSesAllocCount);
771 if (length > 0)
772 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
773 GFP_KERNEL);
774}
775
e9097ab4
JL		 776static int
777standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
778{
779 int length;
780 char *buf = server->smallbuf;
d4e4854f 781 unsigned int pdu_length = get_rfc1002_length(buf);
e9097ab4
JL		 782
783 /* make sure this will fit in a large buffer */
1887f601 784 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
e9097ab4
JL		 785 cERROR(1, "SMB response too long (%u bytes)",
786 pdu_length);
787 cifs_reconnect(server);
788 wake_up(&server->response_q);
789 return -EAGAIN;
790 }
791
792 /* switch to large buffer if too big for a small one */
793 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
794 server->large_buf = true;
d4e4854f 795 memcpy(server->bigbuf, buf, server->total_read);
e9097ab4 796 buf = server->bigbuf;
e9097ab4
JL		 797 }
798
799 /* now read the rest */
1887f601
PS		 800 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
801 pdu_length - HEADER_SIZE(server) + 1 + 4);
e9097ab4
JL		 802 if (length < 0)
803 return length;
804 server->total_read += length;
805
d4e4854f 806 dump_smb(buf, server->total_read);
e9097ab4
JL		 807
808 /*
809 * We know that we received enough to get to the MID as we
810 * checked the pdu_length earlier. Now check to see
811 * if the rest of the header is OK. We borrow the length
812 * var for the rest of the loop to avoid a new stack var.
813 *
814 * 48 bytes is enough to display the header and a little bit
815 * into the payload for debugging purposes.
816 */
8aa26f3e 817 length = server->ops->check_message(buf, server->total_read);
e9097ab4
JL		 818 if (length != 0)
819 cifs_dump_mem("Bad SMB: ", buf,
820 min_t(unsigned int, server->total_read, 48));
821
2e44b288
PS		 822 if (server->ops->is_status_pending &&
823 server->ops->is_status_pending(buf, server, length))
824 return -1;
825
ff4fa4a2
JL		 826 if (!mid)
827 return length;
e9097ab4 828
d4e4854f 829 handle_mid(mid, server, buf, length);
ff4fa4a2 830 return 0;
e9097ab4
JL		 831}
832
1da177e4 833static int
7c97c200 834cifs_demultiplex_thread(void *p)
1da177e4
LT		 835{
836 int length;
7c97c200 837 struct TCP_Server_Info *server = p;
2a37ef94
JL		 838 unsigned int pdu_length;
839 char *buf = NULL;
1da177e4
LT		 840 struct task_struct *task_to_wake = NULL;
841 struct mid_q_entry *mid_entry;
1da177e4 842
1da177e4 843 current->flags |= PF_MEMALLOC;
b6b38f70 844 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
93d0ec85
JL		 845
846 length = atomic_inc_return(&tcpSesAllocCount);
847 if (length > 1)
26f57364
SF		 848 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
849 GFP_KERNEL);
1da177e4 850
83144186 851 set_freezable();
469ee614 852 while (server->tcpStatus != CifsExiting) {
ede1327e
SF		 853 if (try_to_freeze())
854 continue;
b8643e1b 855
2a37ef94 856 if (!allocate_buffers(server))
3d9c2472 857 continue;
b8643e1b 858
2a37ef94 859 server->large_buf = false;
2a37ef94 860 buf = server->smallbuf;
f01d5e14 861 pdu_length = 4; /* enough to get RFC1001 header */
fda35943 862
e28bc5b1 863 length = cifs_read_from_socket(server, buf, pdu_length);
a52c1eb7 864 if (length < 0)
1da177e4 865 continue;
2a37ef94 866 server->total_read = length;
1da177e4 867
98bac62c
PS		 868 /*
869 * The right amount was read from socket - 4 bytes,
870 * so we can now interpret the length field.
871 */
d4e4854f 872 pdu_length = get_rfc1002_length(buf);
70ca734a 873
fe11e4cc
JL		 874 cFYI(1, "RFC1002 header 0x%x", pdu_length);
875 if (!is_smb_response(server, buf[0]))
fb8c4b14 876 continue;
e4eb295d 877
89482a56 878 /* make sure we have enough to get to the MID */
1887f601 879 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
89482a56
JL		 880 cERROR(1, "SMB response too short (%u bytes)",
881 pdu_length);
882 cifs_reconnect(server);
883 wake_up(&server->response_q);
884 continue;
e4eb295d 885 }
e7015fb1 886
89482a56 887 /* read down to the MID */
e28bc5b1 888 length = cifs_read_from_socket(server, buf + 4,
1887f601 889 HEADER_SIZE(server) - 1 - 4);
89482a56 890 if (length < 0)
e4eb295d 891 continue;
2a37ef94 892 server->total_read += length;
1da177e4 893
8aa26f3e 894 mid_entry = server->ops->find_mid(server, buf);
50c2f753 895
44d22d84
JL		 896 if (!mid_entry || !mid_entry->receive)
897 length = standard_receive3(server, mid_entry);
898 else
899 length = mid_entry->receive(server, mid_entry);
71823baf 900
e9097ab4 901 if (length < 0)
fe11e4cc 902 continue;
1da177e4 903
d4e4854f 904 if (server->large_buf)
2a37ef94 905 buf = server->bigbuf;
fda35943 906
fda35943 907 server->lstrp = jiffies;
2b84a36c 908 if (mid_entry != NULL) {
2a37ef94
JL		 909 if (!mid_entry->multiRsp || mid_entry->multiEnd)
910 mid_entry->callback(mid_entry);
7f0adb53
PS		 911 } else if (!server->ops->is_oplock_break ||
912 !server->ops->is_oplock_break(buf, server)) {
b6b38f70 913 cERROR(1, "No task to wake, unknown frame received! "
8097531a 914 "NumMids %d", atomic_read(&midCount));
1887f601
PS		 915 cifs_dump_mem("Received Data is: ", buf,
916 HEADER_SIZE(server));
3979877e 917#ifdef CONFIG_CIFS_DEBUG2
7f0adb53
PS		 918 if (server->ops->dump_detail)
919 server->ops->dump_detail(buf);
3979877e
SF		 920 cifs_dump_mids(server);
921#endif /* CIFS_DEBUG2 */
50c2f753 922
e4eb295d
SF		 923 }
924 } /* end while !EXITING */
925
fd62cb7e 926 /* buffer usually freed in free_mid - need to free it here on exit */
2a37ef94
JL		 927 cifs_buf_release(server->bigbuf);
928 if (server->smallbuf) /* no sense logging a debug message if NULL */
929 cifs_small_buf_release(server->smallbuf);
1da177e4 930
b1c8d2b4 931 task_to_wake = xchg(&server->tsk, NULL);
762dfd10 932 clean_demultiplex_info(server);
50c2f753 933
b1c8d2b4
JL		 934 /* if server->tsk was NULL then wait for a signal before exiting */
935 if (!task_to_wake) {
936 set_current_state(TASK_INTERRUPTIBLE);
937 while (!signal_pending(current)) {
938 schedule();
939 set_current_state(TASK_INTERRUPTIBLE);
940 }
941 set_current_state(TASK_RUNNING);
942 }
943
0468a2cf 944 module_put_and_exit(0);
1da177e4
LT		 945}
946
c359cf3c
JL		 947/* extract the host portion of the UNC string */
948static char *
949extract_hostname(const char *unc)
950{
951 const char *src;
952 char *dst, *delim;
953 unsigned int len;
954
955 /* skip double chars at beginning of string */
956 /* BB: check validity of these bytes? */
957 src = unc + 2;
958
959 /* delimiter between hostname and sharename is always '\\' now */
960 delim = strchr(src, '\\');
961 if (!delim)
962 return ERR_PTR(-EINVAL);
963
964 len = delim - src;
965 dst = kmalloc((len + 1), GFP_KERNEL);
966 if (dst == NULL)
967 return ERR_PTR(-ENOMEM);
968
969 memcpy(dst, src, len);
970 dst[len] = '\0';
971
972 return dst;
973}
974
8830d7e0
SP		 975static int get_option_ul(substring_t args[], unsigned long *option)
976{
977 int rc;
978 char *string;
979
980 string = match_strdup(args);
981 if (string == NULL)
982 return -ENOMEM;
bfa890a3 983 rc = kstrtoul(string, 0, option);
8830d7e0
SP		 984 kfree(string);
985
986 return rc;
987}
988
3da46565
EB		 989static int get_option_uid(substring_t args[], kuid_t *result)
990{
991 unsigned long value;
992 kuid_t uid;
993 int rc;
994
995 rc = get_option_ul(args, &value);
996 if (rc)
997 return rc;
998
999 uid = make_kuid(current_user_ns(), value);
1000 if (!uid_valid(uid))
1001 return -EINVAL;
1002
1003 *result = uid;
1004 return 0;
1005}
1006
1007static int get_option_gid(substring_t args[], kgid_t *result)
1008{
1009 unsigned long value;
1010 kgid_t gid;
1011 int rc;
1012
1013 rc = get_option_ul(args, &value);
1014 if (rc)
1015 return rc;
1016
1017 gid = make_kgid(current_user_ns(), value);
1018 if (!gid_valid(gid))
1019 return -EINVAL;
1020
1021 *result = gid;
1022 return 0;
1023}
8830d7e0
SP		 1024
1025static int cifs_parse_security_flavors(char *value,
1026 struct smb_vol *vol)
1027{
1028
1029 substring_t args[MAX_OPT_ARGS];
1030
1031 switch (match_token(value, cifs_secflavor_tokens, args)) {
1032 case Opt_sec_krb5:
0b7bc840 1033 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_SIGN;
8830d7e0
SP		 1034 break;
1035 case Opt_sec_krb5i:
1036 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN;
1037 break;
1038 case Opt_sec_krb5p:
1039 /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */
1040 cERROR(1, "Krb5 cifs privacy not supported");
1041 break;
1042 case Opt_sec_ntlmssp:
1043 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
1044 break;
1045 case Opt_sec_ntlmsspi:
1046 vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN;
1047 break;
1048 case Opt_ntlm:
1049 /* ntlm is default so can be turned off too */
1050 vol->secFlg |= CIFSSEC_MAY_NTLM;
1051 break;
1052 case Opt_sec_ntlmi:
1053 vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN;
1054 break;
7659624f 1055 case Opt_sec_ntlmv2:
8830d7e0
SP		 1056 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1057 break;
1058 case Opt_sec_ntlmv2i:
1059 vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN;
1060 break;
1061#ifdef CONFIG_CIFS_WEAK_PW_HASH
1062 case Opt_sec_lanman:
1063 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1064 break;
1065#endif
1066 case Opt_sec_none:
1067 vol->nullauth = 1;
1068 break;
1069 default:
1070 cERROR(1, "bad security option: %s", value);
1071 return 1;
1072 }
1073
1074 return 0;
1075}
1076
15b6a473
JL		 1077static int
1078cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1079{
1080 substring_t args[MAX_OPT_ARGS];
1081
1082 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1083 case Opt_cache_loose:
1084 vol->direct_io = false;
1085 vol->strict_io = false;
1086 break;
1087 case Opt_cache_strict:
1088 vol->direct_io = false;
1089 vol->strict_io = true;
1090 break;
1091 case Opt_cache_none:
1092 vol->direct_io = true;
1093 vol->strict_io = false;
1094 break;
1095 default:
1096 cERROR(1, "bad cache= option: %s", value);
1097 return 1;
1098 }
1099 return 0;
1100}
1101
23db65f5
JL		 1102static int
1103cifs_parse_smb_version(char *value, struct smb_vol *vol)
1104{
1105 substring_t args[MAX_OPT_ARGS];
1106
1107 switch (match_token(value, cifs_smb_version_tokens, args)) {
1108 case Smb_1:
1109 vol->ops = &smb1_operations;
1110 vol->vals = &smb1_values;
1111 break;
1080ef75 1112#ifdef CONFIG_CIFS_SMB2
dd446b16
SF		 1113 case Smb_20:
1114 vol->ops = &smb21_operations; /* currently identical with 2.1 */
1115 vol->vals = &smb20_values;
1116 break;
1080ef75
SF		 1117 case Smb_21:
1118 vol->ops = &smb21_operations;
1119 vol->vals = &smb21_values;
1120 break;
e4aa25e7 1121 case Smb_30:
38107d45 1122 vol->ops = &smb30_operations;
e4aa25e7
SF		 1123 vol->vals = &smb30_values;
1124 break;
1080ef75 1125#endif
23db65f5
JL		 1126 default:
1127 cERROR(1, "Unknown vers= option specified: %s", value);
1128 return 1;
1129 }
1130 return 0;
1131}
1132
d387a5c5
JL		 1133/*
1134 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1135 * fields with the result. Returns 0 on success and an error otherwise.
1136 */
1137static int
1138cifs_parse_devname(const char *devname, struct smb_vol *vol)
1139{
1140 char *pos;
1141 const char *delims = "/\\";
1142 size_t len;
1143
1144 /* make sure we have a valid UNC double delimiter prefix */
1145 len = strspn(devname, delims);
1146 if (len != 2)
1147 return -EINVAL;
1148
1149 /* find delimiter between host and sharename */
1150 pos = strpbrk(devname + 2, delims);
1151 if (!pos)
1152 return -EINVAL;
1153
1154 /* skip past delimiter */
1155 ++pos;
1156
1157 /* now go until next delimiter or end of string */
1158 len = strcspn(pos, delims);
1159
1160 /* move "pos" up to delimiter or NULL */
1161 pos += len;
1162 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1163 if (!vol->UNC)
1164 return -ENOMEM;
1165
1166 convert_delimiter(vol->UNC, '\\');
1167
1168 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1169 if (!*pos++ || !*pos)
1170 return 0;
1171
1172 vol->prepath = kstrdup(pos, GFP_KERNEL);
1173 if (!vol->prepath)
1174 return -ENOMEM;
1175
1176 return 0;
1177}
1178
1da177e4 1179static int
b946845a 1180cifs_parse_mount_options(const char *mountdata, const char *devname,
50c2f753 1181 struct smb_vol *vol)
1da177e4 1182{
8830d7e0 1183 char *data, *end;
957df453 1184 char *mountdata_copy = NULL, *options;
1da177e4
LT		 1185 unsigned int temp_len, i, j;
1186 char separator[2];
9b9d6b24
JL		 1187 short int override_uid = -1;
1188 short int override_gid = -1;
1189 bool uid_specified = false;
1190 bool gid_specified = false;
d8162558
JL		 1191 bool sloppy = false;
1192 char *invalid = NULL;
88463999 1193 char *nodename = utsname()->nodename;
8830d7e0
SP		 1194 char *string = NULL;
1195 char *tmp_end, *value;
1196 char delim;
b979aaa1
JL		 1197 bool got_ip = false;
1198 unsigned short port = 0;
1199 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
1da177e4
LT		 1200
1201 separator[0] = ',';
50c2f753 1202 separator[1] = 0;
8830d7e0 1203 delim = separator[0];
1da177e4 1204
6ee9542a
JL		 1205 /* ensure we always start with zeroed-out smb_vol */
1206 memset(vol, 0, sizeof(*vol));
1207
88463999
JL		 1208 /*
1209 * does not have to be perfect mapping since field is
1210 * informational, only used for servers that do not support
1211 * port 445 and it can be overridden at mount time
1212 */
1397f2ee
JL		 1213 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1214 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
88463999
JL		 1215 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1216
1397f2ee 1217 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
a10faeb2
SF		 1218 /* null target name indicates to use *SMBSERVR default called name
1219 if we end up sending RFC1001 session initialize */
1220 vol->target_rfc1001_name[0] = 0;
3e4b3e1f
JL		 1221 vol->cred_uid = current_uid();
1222 vol->linux_uid = current_uid();
a001e5b5 1223 vol->linux_gid = current_gid();
f55ed1a8
JL		 1224
1225 /* default to only allowing write access to owner of the mount */
1226 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
1da177e4
LT		 1227
1228 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
ac67055e
JA		 1229 /* default is always to request posix paths. */
1230 vol->posix_paths = 1;
a0c9217f
JL		 1231 /* default to using server inode numbers where available */
1232 vol->server_ino = 1;
ac67055e 1233
1b359204
JL		 1234 /* default is to use strict cifs caching semantics */
1235 vol->strict_io = true;
1236
6d20e840
SJ		 1237 vol->actimeo = CIFS_DEF_ACTIMEO;
1238
23db65f5
JL		 1239 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1240 vol->ops = &smb1_operations;
1241 vol->vals = &smb1_values;
1242
b946845a
SF		 1243 if (!mountdata)
1244 goto cifs_parse_mount_err;
1245
1246 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1247 if (!mountdata_copy)
1248 goto cifs_parse_mount_err;
1da177e4 1249
b946845a 1250 options = mountdata_copy;
4906e50b 1251 end = options + strlen(options);
8830d7e0 1252
50c2f753 1253 if (strncmp(options, "sep=", 4) == 0) {
fb8c4b14 1254 if (options[4] != 0) {
1da177e4
LT		 1255 separator[0] = options[4];
1256 options += 5;
1257 } else {
b6b38f70 1258 cFYI(1, "Null separator not allowed");
1da177e4
LT		 1259 }
1260 }
3d3ea8e6
SP		 1261 vol->backupuid_specified = false; /* no backup intent for a user */
1262 vol->backupgid_specified = false; /* no backup intent for a group */
50c2f753 1263
d387a5c5
JL		 1264 /*
1265 * For now, we ignore -EINVAL errors under the assumption that the
1266 * unc= and prefixpath= options will be usable.
1267 */
1268 if (cifs_parse_devname(devname, vol) == -ENOMEM) {
1269 printk(KERN_ERR "CIFS: Unable to allocate memory to parse "
1270 "device string.\n");
1271 goto out_nomem;
1272 }
1273
1da177e4 1274 while ((data = strsep(&options, separator)) != NULL) {
8830d7e0
SP		 1275 substring_t args[MAX_OPT_ARGS];
1276 unsigned long option;
1277 int token;
1278
1da177e4
LT		 1279 if (!*data)
1280 continue;
1da177e4 1281
8830d7e0
SP		 1282 token = match_token(data, cifs_mount_option_tokens, args);
1283
1284 switch (token) {
1285
1286 /* Ingnore the following */
1287 case Opt_ignore:
1288 break;
1289
1290 /* Boolean values */
1291 case Opt_user_xattr:
1da177e4 1292 vol->no_xattr = 0;
8830d7e0
SP		 1293 break;
1294 case Opt_nouser_xattr:
1da177e4 1295 vol->no_xattr = 1;
8830d7e0
SP		 1296 break;
1297 case Opt_forceuid:
9b9d6b24 1298 override_uid = 1;
8830d7e0
SP		 1299 break;
1300 case Opt_noforceuid:
9b9d6b24 1301 override_uid = 0;
8830d7e0 1302 break;
72bd481f
JL		 1303 case Opt_forcegid:
1304 override_gid = 1;
1305 break;
1306 case Opt_noforcegid:
1307 override_gid = 0;
1308 break;
8830d7e0 1309 case Opt_noblocksend:
edf1ae40 1310 vol->noblocksnd = 1;
8830d7e0
SP		 1311 break;
1312 case Opt_noautotune:
edf1ae40 1313 vol->noautotune = 1;
8830d7e0
SP		 1314 break;
1315 case Opt_hard:
1da177e4 1316 vol->retry = 1;
8830d7e0
SP		 1317 break;
1318 case Opt_soft:
1da177e4 1319 vol->retry = 0;
8830d7e0
SP		 1320 break;
1321 case Opt_perm:
1da177e4 1322 vol->noperm = 0;
8830d7e0
SP		 1323 break;
1324 case Opt_noperm:
1da177e4 1325 vol->noperm = 1;
8830d7e0
SP		 1326 break;
1327 case Opt_mapchars:
6a0b4824 1328 vol->remap = 1;
8830d7e0
SP		 1329 break;
1330 case Opt_nomapchars:
6a0b4824 1331 vol->remap = 0;
8830d7e0
SP		 1332 break;
1333 case Opt_sfu:
50c2f753 1334 vol->sfu_emul = 1;
8830d7e0
SP		 1335 break;
1336 case Opt_nosfu:
50c2f753 1337 vol->sfu_emul = 0;
8830d7e0
SP		 1338 break;
1339 case Opt_nodfs:
2c1b8615 1340 vol->nodfs = 1;
8830d7e0
SP		 1341 break;
1342 case Opt_posixpaths:
ac67055e 1343 vol->posix_paths = 1;
8830d7e0
SP		 1344 break;
1345 case Opt_noposixpaths:
ac67055e 1346 vol->posix_paths = 0;
8830d7e0
SP		 1347 break;
1348 case Opt_nounix:
c18c842b 1349 vol->no_linux_ext = 1;
8830d7e0
SP		 1350 break;
1351 case Opt_nocase:
50c2f753 1352 vol->nocase = 1;
8830d7e0
SP		 1353 break;
1354 case Opt_brl:
c46fa8ac 1355 vol->nobrl = 0;
8830d7e0
SP		 1356 break;
1357 case Opt_nobrl:
c46fa8ac 1358 vol->nobrl = 1;
5cfdddcf
PS		 1359 /*
1360 * turn off mandatory locking in mode
8830d7e0 1361 * if remote locking is turned off since the
5cfdddcf
PS		 1362 * local vfs will do advisory
1363 */
50c2f753
SF		 1364 if (vol->file_mode ==
1365 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
d3485d37 1366 vol->file_mode = S_IALLUGO;
8830d7e0
SP		 1367 break;
1368 case Opt_forcemandatorylock:
13a6e42a 1369 vol->mand_lock = 1;
8830d7e0
SP		 1370 break;
1371 case Opt_setuids:
1da177e4 1372 vol->setuids = 1;
8830d7e0
SP		 1373 break;
1374 case Opt_nosetuids:
1da177e4 1375 vol->setuids = 0;
8830d7e0
SP		 1376 break;
1377 case Opt_dynperm:
d0a9c078 1378 vol->dynperm = true;
8830d7e0
SP		 1379 break;
1380 case Opt_nodynperm:
d0a9c078 1381 vol->dynperm = false;
8830d7e0
SP		 1382 break;
1383 case Opt_nohard:
1da177e4 1384 vol->retry = 0;
8830d7e0
SP		 1385 break;
1386 case Opt_nosoft:
1da177e4 1387 vol->retry = 1;
8830d7e0
SP		 1388 break;
1389 case Opt_nointr:
1da177e4 1390 vol->intr = 0;
8830d7e0
SP		 1391 break;
1392 case Opt_intr:
1da177e4 1393 vol->intr = 1;
8830d7e0
SP		 1394 break;
1395 case Opt_nostrictsync:
be652445 1396 vol->nostrictsync = 1;
8830d7e0
SP		 1397 break;
1398 case Opt_strictsync:
be652445 1399 vol->nostrictsync = 0;
8830d7e0
SP		 1400 break;
1401 case Opt_serverino:
1da177e4 1402 vol->server_ino = 1;
8830d7e0
SP		 1403 break;
1404 case Opt_noserverino:
1da177e4 1405 vol->server_ino = 0;
8830d7e0
SP		 1406 break;
1407 case Opt_rwpidforward:
d4ffff1f 1408 vol->rwpidforward = 1;
8830d7e0
SP		 1409 break;
1410 case Opt_cifsacl:
0a4b92c0 1411 vol->cifs_acl = 1;
8830d7e0
SP		 1412 break;
1413 case Opt_nocifsacl:
0a4b92c0 1414 vol->cifs_acl = 0;
8830d7e0
SP		 1415 break;
1416 case Opt_acl:
1da177e4 1417 vol->no_psx_acl = 0;
8830d7e0
SP		 1418 break;
1419 case Opt_noacl:
1da177e4 1420 vol->no_psx_acl = 1;
8830d7e0
SP		 1421 break;
1422 case Opt_locallease:
84210e91 1423 vol->local_lease = 1;
8830d7e0
SP		 1424 break;
1425 case Opt_sign:
750d1151 1426 vol->secFlg |= CIFSSEC_MUST_SIGN;
8830d7e0
SP		 1427 break;
1428 case Opt_seal:
95b1cb90 1429 /* we do not do the following in secFlags because seal
8830d7e0
SP		 1430 * is a per tree connection (mount) not a per socket
1431 * or per-smb connection option in the protocol
1432 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1433 */
95b1cb90 1434 vol->seal = 1;
8830d7e0 1435 break;
8830d7e0 1436 case Opt_noac:
50c2f753
SF		 1437 printk(KERN_WARNING "CIFS: Mount option noac not "
1438 "supported. Instead set "
1439 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
8830d7e0
SP		 1440 break;
1441 case Opt_fsc:
607a569d 1442#ifndef CONFIG_CIFS_FSCACHE
83fb086e 1443 cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE "
607a569d 1444 "kernel config option set");
b946845a 1445 goto cifs_parse_mount_err;
607a569d 1446#endif
fa1df75d 1447 vol->fsc = true;
8830d7e0
SP		 1448 break;
1449 case Opt_mfsymlinks:
736a3320 1450 vol->mfsymlinks = true;
8830d7e0
SP		 1451 break;
1452 case Opt_multiuser:
0eb8a132 1453 vol->multiuser = true;
8830d7e0 1454 break;
d8162558
JL		 1455 case Opt_sloppy:
1456 sloppy = true;
1457 break;
8830d7e0
SP		 1458
1459 /* Numeric Values */
1460 case Opt_backupuid:
3da46565 1461 if (get_option_uid(args, &vol->backupuid)) {
3d3ea8e6
SP		 1462 cERROR(1, "%s: Invalid backupuid value",
1463 __func__);
1464 goto cifs_parse_mount_err;
1465 }
1466 vol->backupuid_specified = true;
8830d7e0
SP		 1467 break;
1468 case Opt_backupgid:
3da46565 1469 if (get_option_gid(args, &vol->backupgid)) {
3d3ea8e6
SP		 1470 cERROR(1, "%s: Invalid backupgid value",
1471 __func__);
1472 goto cifs_parse_mount_err;
1473 }
1474 vol->backupgid_specified = true;
8830d7e0
SP		 1475 break;
1476 case Opt_uid:
3da46565 1477 if (get_option_uid(args, &vol->linux_uid)) {
8830d7e0
SP		 1478 cERROR(1, "%s: Invalid uid value",
1479 __func__);
1480 goto cifs_parse_mount_err;
1481 }
8830d7e0
SP		 1482 uid_specified = true;
1483 break;
1484 case Opt_cruid:
3da46565 1485 if (get_option_uid(args, &vol->cred_uid)) {
8830d7e0
SP		 1486 cERROR(1, "%s: Invalid cruid value",
1487 __func__);
1488 goto cifs_parse_mount_err;
1489 }
8830d7e0
SP		 1490 break;
1491 case Opt_gid:
3da46565 1492 if (get_option_gid(args, &vol->linux_gid)) {
8830d7e0
SP		 1493 cERROR(1, "%s: Invalid gid value",
1494 __func__);
1495 goto cifs_parse_mount_err;
1496 }
8830d7e0
SP		 1497 gid_specified = true;
1498 break;
1499 case Opt_file_mode:
1500 if (get_option_ul(args, &option)) {
1501 cERROR(1, "%s: Invalid file_mode value",
1502 __func__);
1503 goto cifs_parse_mount_err;
1504 }
1505 vol->file_mode = option;
1506 break;
1507 case Opt_dirmode:
1508 if (get_option_ul(args, &option)) {
1509 cERROR(1, "%s: Invalid dir_mode value",
1510 __func__);
1511 goto cifs_parse_mount_err;
1512 }
1513 vol->dir_mode = option;
1514 break;
1515 case Opt_port:
b979aaa1
JL		 1516 if (get_option_ul(args, &option) ||
1517 option > USHRT_MAX) {
1518 cERROR(1, "%s: Invalid port value", __func__);
8830d7e0
SP		 1519 goto cifs_parse_mount_err;
1520 }
b979aaa1 1521 port = (unsigned short)option;
8830d7e0
SP		 1522 break;
1523 case Opt_rsize:
1524 if (get_option_ul(args, &option)) {
1525 cERROR(1, "%s: Invalid rsize value",
1526 __func__);
b946845a 1527 goto cifs_parse_mount_err;
8830d7e0
SP		 1528 }
1529 vol->rsize = option;
1530 break;
1531 case Opt_wsize:
1532 if (get_option_ul(args, &option)) {
1533 cERROR(1, "%s: Invalid wsize value",
1534 __func__);
1535 goto cifs_parse_mount_err;
1536 }
1537 vol->wsize = option;
1538 break;
1539 case Opt_actimeo:
1540 if (get_option_ul(args, &option)) {
1541 cERROR(1, "%s: Invalid actimeo value",
1542 __func__);
1543 goto cifs_parse_mount_err;
1544 }
1545 vol->actimeo = HZ * option;
1546 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
1547 cERROR(1, "CIFS: attribute cache"
1548 "timeout too large");
1549 goto cifs_parse_mount_err;
1550 }
1551 break;
1552
1553 /* String Arguments */
1554
4fe9e963
SP		 1555 case Opt_blank_user:
1556 /* null user, ie. anonymous authentication */
1557 vol->nullauth = 1;
1558 vol->username = NULL;
1559 break;
8830d7e0
SP		 1560 case Opt_user:
1561 string = match_strdup(args);
1562 if (string == NULL)
1563 goto out_nomem;
1564
4fe9e963 1565 if (strnlen(string, MAX_USERNAME_SIZE) >
8830d7e0
SP		 1566 MAX_USERNAME_SIZE) {
1567 printk(KERN_WARNING "CIFS: username too long\n");
1568 goto cifs_parse_mount_err;
1569 }
1570 vol->username = kstrdup(string, GFP_KERNEL);
1571 if (!vol->username) {
1572 printk(KERN_WARNING "CIFS: no memory "
1573 "for username\n");
1574 goto cifs_parse_mount_err;
1575 }
1576 break;
1577 case Opt_blank_pass:
1578 vol->password = NULL;
1579 break;
1580 case Opt_pass:
1581 /* passwords have to be handled differently
1582 * to allow the character used for deliminator
1583 * to be passed within them
1584 */
1585
1586 /* Obtain the value string */
1587 value = strchr(data, '=');
10238074 1588 value++;
8830d7e0
SP		 1589
1590 /* Set tmp_end to end of the string */
1591 tmp_end = (char *) value + strlen(value);
1592
1593 /* Check if following character is the deliminator
1594 * If yes, we have encountered a double deliminator
1595 * reset the NULL character to the deliminator
1596 */
e73f843a 1597 if (tmp_end < end && tmp_end[1] == delim) {
8830d7e0
SP		 1598 tmp_end[0] = delim;
1599
e73f843a
SJ		 1600 /* Keep iterating until we get to a single
1601 * deliminator OR the end
1602 */
1603 while ((tmp_end = strchr(tmp_end, delim))
1604 != NULL && (tmp_end[1] == delim)) {
1605 tmp_end = (char *) &tmp_end[2];
1606 }
1607
1608 /* Reset var options to point to next element */
1609 if (tmp_end) {
1610 tmp_end[0] = '\0';
1611 options = (char *) &tmp_end[1];
1612 } else
1613 /* Reached the end of the mount option
1614 * string */
1615 options = end;
8830d7e0
SP		 1616 }
1617
8830d7e0
SP		 1618 /* Now build new password string */
1619 temp_len = strlen(value);
1620 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1621 if (vol->password == NULL) {
1622 printk(KERN_WARNING "CIFS: no memory "
1623 "for password\n");
1624 goto cifs_parse_mount_err;
1625 }
1626
1627 for (i = 0, j = 0; i < temp_len; i++, j++) {
1628 vol->password[j] = value[i];
1629 if ((value[i] == delim) &&
1630 value[i+1] == delim)
1631 /* skip the second deliminator */
1632 i++;
1633 }
1634 vol->password[j] = '\0';
1635 break;
4fe9e963 1636 case Opt_blank_ip:
b979aaa1
JL		 1637 /* FIXME: should this be an error instead? */
1638 got_ip = false;
4fe9e963 1639 break;
8830d7e0
SP		 1640 case Opt_ip:
1641 string = match_strdup(args);
1642 if (string == NULL)
1643 goto out_nomem;
1644
b979aaa1
JL		 1645 if (!cifs_convert_address(dstaddr, string,
1646 strlen(string))) {
1647 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1648 string);
8830d7e0
SP		 1649 goto cifs_parse_mount_err;
1650 }
b979aaa1 1651 got_ip = true;
8830d7e0
SP		 1652 break;
1653 case Opt_unc:
d387a5c5 1654 string = vol->UNC;
62a1a439 1655 vol->UNC = match_strdup(args);
8367224b 1656 if (vol->UNC == NULL)
8830d7e0
SP		 1657 goto out_nomem;
1658
62a1a439
JL		 1659 convert_delimiter(vol->UNC, '\\');
1660 if (vol->UNC[0] != '\\' || vol->UNC[1] != '\\') {
d387a5c5 1661 printk(KERN_ERR "CIFS: UNC Path does not "
62a1a439 1662 "begin with // or \\\\\n");
b946845a 1663 goto cifs_parse_mount_err;
1da177e4 1664 }
8830d7e0 1665
d387a5c5
JL		 1666 /* Compare old unc= option to new one */
1667 if (!string || strcmp(string, vol->UNC))
1668 printk(KERN_WARNING "CIFS: the value of the "
1669 "unc= mount option does not match the "
1670 "device string. Using the unc= option "
1671 "for now. In 3.10, that option will "
1672 "be ignored and the contents of the "
1673 "device string will be used "
1674 "instead. (%s != %s)\n", string,
1675 vol->UNC);
8830d7e0
SP		 1676 break;
1677 case Opt_domain:
1678 string = match_strdup(args);
1679 if (string == NULL)
1680 goto out_nomem;
1681
4fe9e963 1682 if (strnlen(string, 256) == 256) {
8830d7e0
SP		 1683 printk(KERN_WARNING "CIFS: domain name too"
1684 " long\n");
1685 goto cifs_parse_mount_err;
1686 }
1687
1688 vol->domainname = kstrdup(string, GFP_KERNEL);
1689 if (!vol->domainname) {
1690 printk(KERN_WARNING "CIFS: no memory "
1691 "for domainname\n");
1692 goto cifs_parse_mount_err;
1693 }
1694 cFYI(1, "Domain name set");
1695 break;
1696 case Opt_srcaddr:
1697 string = match_strdup(args);
1698 if (string == NULL)
1699 goto out_nomem;
1700
4fe9e963 1701 if (!cifs_convert_address(
8830d7e0
SP		 1702 (struct sockaddr *)&vol->srcaddr,
1703 string, strlen(string))) {
1704 printk(KERN_WARNING "CIFS: Could not parse"
1705 " srcaddr: %s\n", string);
1706 goto cifs_parse_mount_err;
1707 }
1708 break;
1709 case Opt_prefixpath:
839db3d1
JL		 1710 /* skip over any leading delimiter */
1711 if (*args[0].from == '/' || *args[0].from == '\\')
1712 args[0].from++;
8830d7e0 1713
d387a5c5 1714 string = vol->prepath;
839db3d1 1715 vol->prepath = match_strdup(args);
8367224b 1716 if (vol->prepath == NULL)
839db3d1 1717 goto out_nomem;
d387a5c5
JL		 1718 /* Compare old prefixpath= option to new one */
1719 if (!string || strcmp(string, vol->prepath))
1720 printk(KERN_WARNING "CIFS: the value of the "
1721 "prefixpath= mount option does not "
1722 "match the device string. Using the "
1723 "prefixpath= option for now. In 3.10, "
1724 "that option will be ignored and the "
1725 "contents of the device string will be "
1726 "used instead.(%s != %s)\n", string,
1727 vol->prepath);
8830d7e0
SP		 1728 break;
1729 case Opt_iocharset:
1730 string = match_strdup(args);
1731 if (string == NULL)
1732 goto out_nomem;
1733
4fe9e963 1734 if (strnlen(string, 1024) >= 65) {
8830d7e0
SP		 1735 printk(KERN_WARNING "CIFS: iocharset name "
1736 "too long.\n");
1737 goto cifs_parse_mount_err;
1738 }
1739
1740 if (strnicmp(string, "default", 7) != 0) {
1741 vol->iocharset = kstrdup(string,
1742 GFP_KERNEL);
1743 if (!vol->iocharset) {
1744 printk(KERN_WARNING "CIFS: no memory"
1745 "for charset\n");
1746 goto cifs_parse_mount_err;
1747 }
1748 }
1749 /* if iocharset not set then load_nls_default
1750 * is used by caller
1751 */
1752 cFYI(1, "iocharset set to %s", string);
1753 break;
8830d7e0
SP		 1754 case Opt_netbiosname:
1755 string = match_strdup(args);
1756 if (string == NULL)
1757 goto out_nomem;
1758
8830d7e0
SP		 1759 memset(vol->source_rfc1001_name, 0x20,
1760 RFC1001_NAME_LEN);
1761 /*
1762 * FIXME: are there cases in which a comma can
1763 * be valid in workstation netbios name (and
1764 * need special handling)?
1765 */
1766 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1767 /* don't ucase netbiosname for user */
1768 if (string[i] == 0)
1769 break;
1770 vol->source_rfc1001_name[i] = string[i];
1771 }
1772 /* The string has 16th byte zero still from
1773 * set at top of the function
1774 */
1775 if (i == RFC1001_NAME_LEN && string[i] != 0)
1776 printk(KERN_WARNING "CIFS: netbiosname"
1777 " longer than 15 truncated.\n");
1778
1779 break;
1780 case Opt_servern:
1781 /* servernetbiosname specified override *SMBSERVER */
1782 string = match_strdup(args);
1783 if (string == NULL)
1784 goto out_nomem;
1785
8830d7e0
SP		 1786 /* last byte, type, is 0x20 for servr type */
1787 memset(vol->target_rfc1001_name, 0x20,
1788 RFC1001_NAME_LEN_WITH_NULL);
1789
1790 /* BB are there cases in which a comma can be
1791 valid in this workstation netbios name
1792 (and need special handling)? */
1793
1794 /* user or mount helper must uppercase the
1795 netbios name */
1796 for (i = 0; i < 15; i++) {
1797 if (string[i] == 0)
1798 break;
1799 vol->target_rfc1001_name[i] = string[i];
1800 }
1801 /* The string has 16th byte zero still from
1802 set at top of the function */
1803 if (i == RFC1001_NAME_LEN && string[i] != 0)
1804 printk(KERN_WARNING "CIFS: server net"
1805 "biosname longer than 15 truncated.\n");
1806 break;
1807 case Opt_ver:
1808 string = match_strdup(args);
1809 if (string == NULL)
1810 goto out_nomem;
1811
5249af32 1812 if (strnicmp(string, "1", 1) == 0) {
8830d7e0
SP		 1813 /* This is the default */
1814 break;
1815 }
1816 /* For all other value, error */
1817 printk(KERN_WARNING "CIFS: Invalid version"
1818 " specified\n");
b946845a 1819 goto cifs_parse_mount_err;
23db65f5
JL		 1820 case Opt_vers:
1821 string = match_strdup(args);
1822 if (string == NULL)
1823 goto out_nomem;
1824
1825 if (cifs_parse_smb_version(string, vol) != 0)
1826 goto cifs_parse_mount_err;
1827 break;
8830d7e0
SP		 1828 case Opt_sec:
1829 string = match_strdup(args);
1830 if (string == NULL)
1831 goto out_nomem;
1832
8830d7e0
SP		 1833 if (cifs_parse_security_flavors(string, vol) != 0)
1834 goto cifs_parse_mount_err;
1835 break;
15b6a473
JL		 1836 case Opt_cache:
1837 string = match_strdup(args);
1838 if (string == NULL)
1839 goto out_nomem;
1840
1841 if (cifs_parse_cache_flavor(string, vol) != 0)
1842 goto cifs_parse_mount_err;
1843 break;
8830d7e0 1844 default:
d8162558
JL		 1845 /*
1846 * An option we don't recognize. Save it off for later
1847 * if we haven't already found one
1848 */
1849 if (!invalid)
1850 invalid = data;
8830d7e0 1851 break;
1da177e4 1852 }
8830d7e0
SP		 1853 /* Free up any allocated string */
1854 kfree(string);
1855 string = NULL;
1da177e4 1856 }
0eb8a132 1857
d8162558
JL		 1858 if (!sloppy && invalid) {
1859 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1860 goto cifs_parse_mount_err;
1861 }
1862
8a8798a5
JL		 1863#ifndef CONFIG_KEYS
1864 /* Muliuser mounts require CONFIG_KEYS support */
1865 if (vol->multiuser) {
1866 cERROR(1, "Multiuser mounts require kernels with "
1867 "CONFIG_KEYS enabled.");
b946845a 1868 goto cifs_parse_mount_err;
0eb8a132 1869 }
8a8798a5 1870#endif
e5e69abd 1871 if (!vol->UNC) {
d387a5c5
JL		 1872 cERROR(1, "CIFS mount error: No usable UNC path provided in "
1873 "device string or in unc= option!");
e5e69abd
JL		 1874 goto cifs_parse_mount_err;
1875 }
0eb8a132 1876
62a1a439
JL		 1877 /* make sure UNC has a share name */
1878 if (!strchr(vol->UNC + 3, '\\')) {
1879 cERROR(1, "Malformed UNC. Unable to find share name.");
1880 goto cifs_parse_mount_err;
1881 }
1882
b979aaa1
JL		 1883 if (!got_ip) {
1884 /* No ip= option specified? Try to get it from UNC */
1885 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1886 strlen(&vol->UNC[2]))) {
1887 printk(KERN_ERR "Unable to determine destination "
1888 "address.\n");
1889 goto cifs_parse_mount_err;
1890 }
1891 }
1892
1893 /* set the port that we got earlier */
1894 cifs_set_port(dstaddr, port);
1da177e4 1895
9b9d6b24
JL		 1896 if (uid_specified)
1897 vol->override_uid = override_uid;
1898 else if (override_uid == 1)
1899 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1900 "specified with no uid= option.\n");
1901
1902 if (gid_specified)
1903 vol->override_gid = override_gid;
1904 else if (override_gid == 1)
1905 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1906 "specified with no gid= option.\n");
1907
b946845a 1908 kfree(mountdata_copy);
1da177e4 1909 return 0;
b946845a 1910
8830d7e0
SP		 1911out_nomem:
1912 printk(KERN_WARNING "Could not allocate temporary buffer\n");
b946845a 1913cifs_parse_mount_err:
8830d7e0 1914 kfree(string);
b946845a
SF		 1915 kfree(mountdata_copy);
1916 return 1;
1da177e4
LT		 1917}
1918
3eb9a889
BG		 1919/** Returns true if srcaddr isn't specified and rhs isn't
1920 * specified, or if srcaddr is specified and
1921 * matches the IP address of the rhs argument.
1922 */
1923static bool
1924srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1925{
1926 switch (srcaddr->sa_family) {
1927 case AF_UNSPEC:
1928 return (rhs->sa_family == AF_UNSPEC);
1929 case AF_INET: {
1930 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1931 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1932 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1933 }
1934 case AF_INET6: {
1935 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
e3e2775c 1936 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
3eb9a889
BG		 1937 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1938 }
1939 default:
1940 WARN_ON(1);
1941 return false; /* don't expect to be here */
1942 }
1943}
1944
4b886136
PS		 1945/*
1946 * If no port is specified in addr structure, we try to match with 445 port
1947 * and if it fails - with 139 ports. It should be called only if address
1948 * families of server and addr are equal.
1949 */
1950static bool
1951match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1952{
6da97910 1953 __be16 port, *sport;
4b886136
PS		 1954
1955 switch (addr->sa_family) {
1956 case AF_INET:
1957 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1958 port = ((struct sockaddr_in *) addr)->sin_port;
1959 break;
1960 case AF_INET6:
1961 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1962 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1963 break;
1964 default:
1965 WARN_ON(1);
1966 return false;
1967 }
1968
1969 if (!port) {
1970 port = htons(CIFS_PORT);
1971 if (port == *sport)
1972 return true;
1973
1974 port = htons(RFC1001_PORT);
1975 }
1976
1977 return port == *sport;
1978}
3eb9a889 1979
4515148e 1980static bool
3eb9a889
BG		 1981match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1982 struct sockaddr *srcaddr)
4515148e 1983{
4515148e 1984 switch (addr->sa_family) {
a9f1b85e
PS		 1985 case AF_INET: {
1986 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1987 struct sockaddr_in *srv_addr4 =
1988 (struct sockaddr_in *)&server->dstaddr;
1989
1990 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
4515148e 1991 return false;
4515148e 1992 break;
a9f1b85e
PS		 1993 }
1994 case AF_INET6: {
1995 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1996 struct sockaddr_in6 *srv_addr6 =
1997 (struct sockaddr_in6 *)&server->dstaddr;
1998
4515148e 1999 if (!ipv6_addr_equal(&addr6->sin6_addr,
a9f1b85e 2000 &srv_addr6->sin6_addr))
4515148e 2001 return false;
a9f1b85e 2002 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
4515148e 2003 return false;
4515148e
JL		 2004 break;
2005 }
a9f1b85e
PS		 2006 default:
2007 WARN_ON(1);
2008 return false; /* don't expect to be here */
2009 }
4515148e 2010
3eb9a889
BG		 2011 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
2012 return false;
2013
4515148e
JL		 2014 return true;
2015}
2016
daf5b0b6
JL		 2017static bool
2018match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
2019{
2020 unsigned int secFlags;
2021
2022 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
2023 secFlags = vol->secFlg;
2024 else
2025 secFlags = global_secflags | vol->secFlg;
2026
2027 switch (server->secType) {
2028 case LANMAN:
2029 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
2030 return false;
2031 break;
2032 case NTLMv2:
2033 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
2034 return false;
2035 break;
2036 case NTLM:
2037 if (!(secFlags & CIFSSEC_MAY_NTLM))
2038 return false;
2039 break;
2040 case Kerberos:
2041 if (!(secFlags & CIFSSEC_MAY_KRB5))
2042 return false;
2043 break;
2044 case RawNTLMSSP:
2045 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
2046 return false;
2047 break;
2048 default:
2049 /* shouldn't happen */
2050 return false;
2051 }
2052
25985edc 2053 /* now check if signing mode is acceptable */
daf5b0b6 2054 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
96daf2b0 2055 (server->sec_mode & SECMODE_SIGN_REQUIRED))
daf5b0b6
JL		 2056 return false;
2057 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
96daf2b0 2058 (server->sec_mode &
daf5b0b6
JL		 2059 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
2060 return false;
2061
2062 return true;
2063}
2064
9fa114f7 2065static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
37bb04e5 2066{
9fa114f7
JL		 2067 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2068
23db65f5
JL		 2069 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2070 return 0;
2071
37bb04e5
PS		 2072 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2073 return 0;
2074
2075 if (!match_address(server, addr,
2076 (struct sockaddr *)&vol->srcaddr))
2077 return 0;
2078
2079 if (!match_port(server, addr))
2080 return 0;
2081
2082 if (!match_security(server, vol))
2083 return 0;
2084
2085 return 1;
2086}
2087
e7ddee90 2088static struct TCP_Server_Info *
9fa114f7 2089cifs_find_tcp_session(struct smb_vol *vol)
1da177e4 2090{
e7ddee90 2091 struct TCP_Server_Info *server;
e7ddee90 2092
3f9bcca7 2093 spin_lock(&cifs_tcp_ses_lock);
4515148e 2094 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
9fa114f7 2095 if (!match_server(server, vol))
daf5b0b6
JL		 2096 continue;
2097
e7ddee90 2098 ++server->srv_count;
3f9bcca7 2099 spin_unlock(&cifs_tcp_ses_lock);
b6b38f70 2100 cFYI(1, "Existing tcp session with server found");
e7ddee90 2101 return server;
1da177e4 2102 }
3f9bcca7 2103 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2104 return NULL;
2105}
1b20d672 2106
14fbf50d 2107static void
e7ddee90 2108cifs_put_tcp_session(struct TCP_Server_Info *server)
1da177e4 2109{
e7ddee90 2110 struct task_struct *task;
1b20d672 2111
3f9bcca7 2112 spin_lock(&cifs_tcp_ses_lock);
e7ddee90 2113 if (--server->srv_count > 0) {
3f9bcca7 2114 spin_unlock(&cifs_tcp_ses_lock);
e7ddee90 2115 return;
1da177e4 2116 }
1b20d672 2117
f1d0c998
RL		 2118 put_net(cifs_net_ns(server));
2119
e7ddee90 2120 list_del_init(&server->tcp_ses_list);
3f9bcca7 2121 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2122
c74093b6
JL		 2123 cancel_delayed_work_sync(&server->echo);
2124
e7ddee90
JL		 2125 spin_lock(&GlobalMid_Lock);
2126 server->tcpStatus = CifsExiting;
2127 spin_unlock(&GlobalMid_Lock);
dea570e0 2128
d2b91521 2129 cifs_crypto_shash_release(server);
488f1d2d
SJ		 2130 cifs_fscache_release_client_cookie(server);
2131
21e73393
SP		 2132 kfree(server->session_key.response);
2133 server->session_key.response = NULL;
2134 server->session_key.len = 0;
2135
e7ddee90
JL		 2136 task = xchg(&server->tsk, NULL);
2137 if (task)
2138 force_sig(SIGKILL, task);
1da177e4
LT		 2139}
2140
63c038c2
JL		 2141static struct TCP_Server_Info *
2142cifs_get_tcp_session(struct smb_vol *volume_info)
2143{
2144 struct TCP_Server_Info *tcp_ses = NULL;
63c038c2
JL		 2145 int rc;
2146
b979aaa1 2147 cFYI(1, "UNC: %s", volume_info->UNC);
63c038c2
JL		 2148
2149 /* see if we already have a matching tcp_ses */
9fa114f7 2150 tcp_ses = cifs_find_tcp_session(volume_info);
63c038c2
JL		 2151 if (tcp_ses)
2152 return tcp_ses;
2153
2154 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2155 if (!tcp_ses) {
2156 rc = -ENOMEM;
2157 goto out_err;
2158 }
2159
d2b91521
SP		 2160 rc = cifs_crypto_shash_allocate(tcp_ses);
2161 if (rc) {
2162 cERROR(1, "could not setup hash structures rc %d", rc);
2163 goto out_err;
2164 }
2165
23db65f5
JL		 2166 tcp_ses->ops = volume_info->ops;
2167 tcp_ses->vals = volume_info->vals;
f1d0c998 2168 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
63c038c2
JL		 2169 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2170 if (IS_ERR(tcp_ses->hostname)) {
2171 rc = PTR_ERR(tcp_ses->hostname);
f7c5445a 2172 goto out_err_crypto_release;
63c038c2
JL		 2173 }
2174
2175 tcp_ses->noblocksnd = volume_info->noblocksnd;
2176 tcp_ses->noautotune = volume_info->noautotune;
6a5fa236 2177 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
fc40f9cf 2178 tcp_ses->in_flight = 0;
2d86dbc9 2179 tcp_ses->credits = 1;
63c038c2
JL		 2180 init_waitqueue_head(&tcp_ses->response_q);
2181 init_waitqueue_head(&tcp_ses->request_q);
2182 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2183 mutex_init(&tcp_ses->srv_mutex);
2184 memcpy(tcp_ses->workstation_RFC1001_name,
2185 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2186 memcpy(tcp_ses->server_RFC1001_name,
2187 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
5d0d2882 2188 tcp_ses->session_estab = false;
63c038c2 2189 tcp_ses->sequence_number = 0;
fda35943 2190 tcp_ses->lstrp = jiffies;
58fa015f 2191 spin_lock_init(&tcp_ses->req_lock);
63c038c2
JL		 2192 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2193 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
c74093b6 2194 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
9fa114f7
JL		 2195 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2196 sizeof(tcp_ses->srcaddr));
2197 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2198 sizeof(tcp_ses->dstaddr));
63c038c2
JL		 2199 /*
2200 * at this point we are the only ones with the pointer
2201 * to the struct since the kernel thread not created yet
2202 * no need to spinlock this init of tcpStatus or srv_count
2203 */
2204 tcp_ses->tcpStatus = CifsNew;
2205 ++tcp_ses->srv_count;
2206
a9f1b85e 2207 rc = ip_connect(tcp_ses);
63c038c2 2208 if (rc < 0) {
b6b38f70 2209 cERROR(1, "Error connecting to socket. Aborting operation");
f7c5445a 2210 goto out_err_crypto_release;
63c038c2
JL		 2211 }
2212
2213 /*
2214 * since we're in a cifs function already, we know that
2215 * this will succeed. No need for try_module_get().
2216 */
2217 __module_get(THIS_MODULE);
7c97c200 2218 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
63c038c2
JL		 2219 tcp_ses, "cifsd");
2220 if (IS_ERR(tcp_ses->tsk)) {
2221 rc = PTR_ERR(tcp_ses->tsk);
b6b38f70 2222 cERROR(1, "error %d create cifsd thread", rc);
63c038c2 2223 module_put(THIS_MODULE);
f7c5445a 2224 goto out_err_crypto_release;
63c038c2 2225 }
fd88ce93 2226 tcp_ses->tcpStatus = CifsNeedNegotiate;
63c038c2
JL		 2227
2228 /* thread spawned, put it on the list */
3f9bcca7 2229 spin_lock(&cifs_tcp_ses_lock);
63c038c2 2230 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
3f9bcca7 2231 spin_unlock(&cifs_tcp_ses_lock);
63c038c2 2232
488f1d2d
SJ		 2233 cifs_fscache_get_client_cookie(tcp_ses);
2234
c74093b6 2235 /* queue echo request delayed work */
da472fc8 2236 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
c74093b6 2237
63c038c2
JL		 2238 return tcp_ses;
2239
f7c5445a 2240out_err_crypto_release:
d2b91521
SP		 2241 cifs_crypto_shash_release(tcp_ses);
2242
f1d0c998
RL		 2243 put_net(cifs_net_ns(tcp_ses));
2244
63c038c2
JL		 2245out_err:
2246 if (tcp_ses) {
8347a5cd
SF		 2247 if (!IS_ERR(tcp_ses->hostname))
2248 kfree(tcp_ses->hostname);
63c038c2
JL		 2249 if (tcp_ses->ssocket)
2250 sock_release(tcp_ses->ssocket);
2251 kfree(tcp_ses);
2252 }
2253 return ERR_PTR(rc);
2254}
2255
96daf2b0 2256static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
37bb04e5
PS		 2257{
2258 switch (ses->server->secType) {
2259 case Kerberos:
64ed39dd 2260 if (!uid_eq(vol->cred_uid, ses->cred_uid))
37bb04e5
PS		 2261 return 0;
2262 break;
2263 default:
04febabc
JL		 2264 /* NULL username means anonymous session */
2265 if (ses->user_name == NULL) {
2266 if (!vol->nullauth)
2267 return 0;
2268 break;
2269 }
2270
37bb04e5 2271 /* anything else takes username/password */
04febabc
JL		 2272 if (strncmp(ses->user_name,
2273 vol->username ? vol->username : "",
37bb04e5
PS		 2274 MAX_USERNAME_SIZE))
2275 return 0;
2276 if (strlen(vol->username) != 0 &&
2277 ses->password != NULL &&
2278 strncmp(ses->password,
2279 vol->password ? vol->password : "",
2280 MAX_PASSWORD_SIZE))
2281 return 0;
2282 }
2283 return 1;
2284}
2285
96daf2b0 2286static struct cifs_ses *
4ff67b72 2287cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1da177e4 2288{
96daf2b0 2289 struct cifs_ses *ses;
dea570e0 2290
3f9bcca7 2291 spin_lock(&cifs_tcp_ses_lock);
4ff67b72 2292 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
37bb04e5
PS		 2293 if (!match_session(ses, vol))
2294 continue;
14fbf50d 2295 ++ses->ses_count;
3f9bcca7 2296 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2297 return ses;
2298 }
3f9bcca7 2299 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2300 return NULL;
2301}
dea570e0 2302
14fbf50d 2303static void
96daf2b0 2304cifs_put_smb_ses(struct cifs_ses *ses)
14fbf50d 2305{
58c45c58 2306 unsigned int xid;
14fbf50d 2307 struct TCP_Server_Info *server = ses->server;
dea570e0 2308
ac3aa2f8 2309 cFYI(1, "%s: ses_count=%d", __func__, ses->ses_count);
3f9bcca7 2310 spin_lock(&cifs_tcp_ses_lock);
14fbf50d 2311 if (--ses->ses_count > 0) {
3f9bcca7 2312 spin_unlock(&cifs_tcp_ses_lock);
14fbf50d
JL		 2313 return;
2314 }
dea570e0 2315
14fbf50d 2316 list_del_init(&ses->smb_ses_list);
3f9bcca7 2317 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2318
58c45c58 2319 if (ses->status == CifsGood && server->ops->logoff) {
6d5786a3 2320 xid = get_xid();
58c45c58 2321 server->ops->logoff(xid, ses);
6d5786a3 2322 _free_xid(xid);
14fbf50d
JL		 2323 }
2324 sesInfoFree(ses);
2325 cifs_put_tcp_session(server);
2326}
dea570e0 2327
8a8798a5
JL		 2328#ifdef CONFIG_KEYS
2329
2330/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
2331#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
2332
2333/* Populate username and pw fields from keyring if possible */
2334static int
2335cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2336{
2337 int rc = 0;
2338 char *desc, *delim, *payload;
2339 ssize_t len;
2340 struct key *key;
2341 struct TCP_Server_Info *server = ses->server;
2342 struct sockaddr_in *sa;
2343 struct sockaddr_in6 *sa6;
2344 struct user_key_payload *upayload;
2345
2346 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2347 if (!desc)
2348 return -ENOMEM;
2349
2350 /* try to find an address key first */
2351 switch (server->dstaddr.ss_family) {
2352 case AF_INET:
2353 sa = (struct sockaddr_in *)&server->dstaddr;
2354 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2355 break;
2356 case AF_INET6:
2357 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2358 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2359 break;
2360 default:
2361 cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family);
2362 rc = -EINVAL;
2363 goto out_err;
2364 }
2365
2366 cFYI(1, "%s: desc=%s", __func__, desc);
2367 key = request_key(&key_type_logon, desc, "");
2368 if (IS_ERR(key)) {
2369 if (!ses->domainName) {
2370 cFYI(1, "domainName is NULL");
2371 rc = PTR_ERR(key);
2372 goto out_err;
2373 }
2374
2375 /* didn't work, try to find a domain key */
2376 sprintf(desc, "cifs:d:%s", ses->domainName);
2377 cFYI(1, "%s: desc=%s", __func__, desc);
2378 key = request_key(&key_type_logon, desc, "");
2379 if (IS_ERR(key)) {
2380 rc = PTR_ERR(key);
2381 goto out_err;
2382 }
2383 }
2384
2385 down_read(&key->sem);
2386 upayload = key->payload.data;
2387 if (IS_ERR_OR_NULL(upayload)) {
4edc53c1 2388 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
8a8798a5
JL		 2389 goto out_key_put;
2390 }
2391
2392 /* find first : in payload */
2393 payload = (char *)upayload->data;
2394 delim = strnchr(payload, upayload->datalen, ':');
2395 cFYI(1, "payload=%s", payload);
2396 if (!delim) {
2397 cFYI(1, "Unable to find ':' in payload (datalen=%d)",
2398 upayload->datalen);
2399 rc = -EINVAL;
2400 goto out_key_put;
2401 }
2402
2403 len = delim - payload;
2404 if (len > MAX_USERNAME_SIZE || len <= 0) {
000f9bb8 2405 cFYI(1, "Bad value from username search (len=%zd)", len);
8a8798a5
JL		 2406 rc = -EINVAL;
2407 goto out_key_put;
2408 }
2409
2410 vol->username = kstrndup(payload, len, GFP_KERNEL);
2411 if (!vol->username) {
000f9bb8 2412 cFYI(1, "Unable to allocate %zd bytes for username", len);
8a8798a5
JL		 2413 rc = -ENOMEM;
2414 goto out_key_put;
2415 }
2416 cFYI(1, "%s: username=%s", __func__, vol->username);
2417
2418 len = key->datalen - (len + 1);
2419 if (len > MAX_PASSWORD_SIZE || len <= 0) {
000f9bb8 2420 cFYI(1, "Bad len for password search (len=%zd)", len);
8a8798a5
JL		 2421 rc = -EINVAL;
2422 kfree(vol->username);
2423 vol->username = NULL;
2424 goto out_key_put;
2425 }
2426
2427 ++delim;
2428 vol->password = kstrndup(delim, len, GFP_KERNEL);
2429 if (!vol->password) {
000f9bb8 2430 cFYI(1, "Unable to allocate %zd bytes for password", len);
8a8798a5
JL		 2431 rc = -ENOMEM;
2432 kfree(vol->username);
2433 vol->username = NULL;
2434 goto out_key_put;
2435 }
2436
2437out_key_put:
2438 up_read(&key->sem);
2439 key_put(key);
2440out_err:
2441 kfree(desc);
2442 cFYI(1, "%s: returning %d", __func__, rc);
2443 return rc;
2444}
2445#else /* ! CONFIG_KEYS */
2446static inline int
2447cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2448 struct cifs_ses *ses __attribute__((unused)))
2449{
2450 return -ENOSYS;
2451}
2452#endif /* CONFIG_KEYS */
2453
96daf2b0 2454static struct cifs_ses *
36988c76
JL		 2455cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2456{
286170aa
PS		 2457 int rc = -ENOMEM;
2458 unsigned int xid;
96daf2b0 2459 struct cifs_ses *ses;
a9f1b85e
PS		 2460 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2461 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
36988c76 2462
6d5786a3 2463 xid = get_xid();
36988c76 2464
4ff67b72 2465 ses = cifs_find_smb_ses(server, volume_info);
36988c76
JL		 2466 if (ses) {
2467 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
2468
36988c76 2469 mutex_lock(&ses->session_mutex);
198b5682
JL		 2470 rc = cifs_negotiate_protocol(xid, ses);
2471 if (rc) {
2472 mutex_unlock(&ses->session_mutex);
2473 /* problem -- put our ses reference */
2474 cifs_put_smb_ses(ses);
6d5786a3 2475 free_xid(xid);
198b5682
JL		 2476 return ERR_PTR(rc);
2477 }
36988c76
JL		 2478 if (ses->need_reconnect) {
2479 cFYI(1, "Session needs reconnect");
2480 rc = cifs_setup_session(xid, ses,
2481 volume_info->local_nls);
2482 if (rc) {
2483 mutex_unlock(&ses->session_mutex);
2484 /* problem -- put our reference */
2485 cifs_put_smb_ses(ses);
6d5786a3 2486 free_xid(xid);
36988c76
JL		 2487 return ERR_PTR(rc);
2488 }
2489 }
2490 mutex_unlock(&ses->session_mutex);
460cf341
JL		 2491
2492 /* existing SMB ses has a server reference already */
2493 cifs_put_tcp_session(server);
6d5786a3 2494 free_xid(xid);
36988c76
JL		 2495 return ses;
2496 }
2497
2498 cFYI(1, "Existing smb sess not found");
2499 ses = sesInfoAlloc();
2500 if (ses == NULL)
2501 goto get_ses_fail;
2502
2503 /* new SMB session uses our server ref */
2504 ses->server = server;
a9f1b85e
PS		 2505 if (server->dstaddr.ss_family == AF_INET6)
2506 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
36988c76 2507 else
a9f1b85e 2508 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
36988c76 2509
8727c8a8
SF		 2510 if (volume_info->username) {
2511 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2512 if (!ses->user_name)
2513 goto get_ses_fail;
2514 }
36988c76
JL		 2515
2516 /* volume_info->password freed at unmount */
2517 if (volume_info->password) {
2518 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2519 if (!ses->password)
2520 goto get_ses_fail;
2521 }
2522 if (volume_info->domainname) {
d3686d54
SP		 2523 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2524 if (!ses->domainName)
2525 goto get_ses_fail;
36988c76 2526 }
3e4b3e1f 2527 ses->cred_uid = volume_info->cred_uid;
36988c76 2528 ses->linux_uid = volume_info->linux_uid;
d9b94201 2529
36988c76
JL		 2530 ses->overrideSecFlg = volume_info->secFlg;
2531
2532 mutex_lock(&ses->session_mutex);
198b5682
JL		 2533 rc = cifs_negotiate_protocol(xid, ses);
2534 if (!rc)
2535 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
36988c76 2536 mutex_unlock(&ses->session_mutex);
c8e56f1f 2537 if (rc)
36988c76
JL		 2538 goto get_ses_fail;
2539
2540 /* success, put it on the list */
3f9bcca7 2541 spin_lock(&cifs_tcp_ses_lock);
36988c76 2542 list_add(&ses->smb_ses_list, &server->smb_ses_list);
3f9bcca7 2543 spin_unlock(&cifs_tcp_ses_lock);
36988c76 2544
6d5786a3 2545 free_xid(xid);
36988c76
JL		 2546 return ses;
2547
2548get_ses_fail:
2549 sesInfoFree(ses);
6d5786a3 2550 free_xid(xid);
36988c76
JL		 2551 return ERR_PTR(rc);
2552}
2553
96daf2b0 2554static int match_tcon(struct cifs_tcon *tcon, const char *unc)
37bb04e5
PS		 2555{
2556 if (tcon->tidStatus == CifsExiting)
2557 return 0;
2558 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2559 return 0;
2560 return 1;
2561}
2562
96daf2b0
SF		 2563static struct cifs_tcon *
2564cifs_find_tcon(struct cifs_ses *ses, const char *unc)
f1987b44
JL		 2565{
2566 struct list_head *tmp;
96daf2b0 2567 struct cifs_tcon *tcon;
f1987b44 2568
3f9bcca7 2569 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2570 list_for_each(tmp, &ses->tcon_list) {
96daf2b0 2571 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
37bb04e5 2572 if (!match_tcon(tcon, unc))
f1987b44 2573 continue;
f1987b44 2574 ++tcon->tc_count;
3f9bcca7 2575 spin_unlock(&cifs_tcp_ses_lock);
dea570e0 2576 return tcon;
1da177e4 2577 }
3f9bcca7 2578 spin_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 2579 return NULL;
2580}
2581
f1987b44 2582static void
96daf2b0 2583cifs_put_tcon(struct cifs_tcon *tcon)
f1987b44 2584{
2e6e02ab 2585 unsigned int xid;
96daf2b0 2586 struct cifs_ses *ses = tcon->ses;
f1987b44 2587
ac3aa2f8 2588 cFYI(1, "%s: tc_count=%d", __func__, tcon->tc_count);
3f9bcca7 2589 spin_lock(&cifs_tcp_ses_lock);
f1987b44 2590 if (--tcon->tc_count > 0) {
3f9bcca7 2591 spin_unlock(&cifs_tcp_ses_lock);
f1987b44
JL		 2592 return;
2593 }
2594
2595 list_del_init(&tcon->tcon_list);
3f9bcca7 2596 spin_unlock(&cifs_tcp_ses_lock);
f1987b44 2597
6d5786a3 2598 xid = get_xid();
2e6e02ab
PS		 2599 if (ses->server->ops->tree_disconnect)
2600 ses->server->ops->tree_disconnect(xid, tcon);
6d5786a3 2601 _free_xid(xid);
f1987b44 2602
d03382ce 2603 cifs_fscache_release_super_cookie(tcon);
9f841593 2604 tconInfoFree(tcon);
f1987b44
JL		 2605 cifs_put_smb_ses(ses);
2606}
2607
96daf2b0
SF		 2608static struct cifs_tcon *
2609cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
d00c28de
JL		 2610{
2611 int rc, xid;
96daf2b0 2612 struct cifs_tcon *tcon;
d00c28de
JL		 2613
2614 tcon = cifs_find_tcon(ses, volume_info->UNC);
2615 if (tcon) {
2616 cFYI(1, "Found match on UNC path");
2617 /* existing tcon already has a reference */
2618 cifs_put_smb_ses(ses);
2619 if (tcon->seal != volume_info->seal)
2620 cERROR(1, "transport encryption setting "
2621 "conflicts with existing tid");
2622 return tcon;
2623 }
2624
2e6e02ab
PS		 2625 if (!ses->server->ops->tree_connect) {
2626 rc = -ENOSYS;
2627 goto out_fail;
2628 }
2629
d00c28de
JL		 2630 tcon = tconInfoAlloc();
2631 if (tcon == NULL) {
2632 rc = -ENOMEM;
2633 goto out_fail;
2634 }
2635
2636 tcon->ses = ses;
2637 if (volume_info->password) {
2638 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2639 if (!tcon->password) {
2640 rc = -ENOMEM;
2641 goto out_fail;
2642 }
2643 }
2644
2e6e02ab
PS		 2645 /*
2646 * BB Do we need to wrap session_mutex around this TCon call and Unix
2647 * SetFS as we do on SessSetup and reconnect?
2648 */
6d5786a3 2649 xid = get_xid();
2e6e02ab
PS		 2650 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2651 volume_info->local_nls);
6d5786a3 2652 free_xid(xid);
2e6e02ab 2653 cFYI(1, "Tcon rc = %d", rc);
d00c28de
JL		 2654 if (rc)
2655 goto out_fail;
2656
2657 if (volume_info->nodfs) {
2658 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2659 cFYI(1, "DFS disabled (%d)", tcon->Flags);
2660 }
2661 tcon->seal = volume_info->seal;
2e6e02ab
PS		 2662 /*
2663 * We can have only one retry value for a connection to a share so for
2664 * resources mounted more than once to the same server share the last
2665 * value passed in for the retry flag is used.
2666 */
d00c28de
JL		 2667 tcon->retry = volume_info->retry;
2668 tcon->nocase = volume_info->nocase;
2669 tcon->local_lease = volume_info->local_lease;
233839b1 2670 INIT_LIST_HEAD(&tcon->pending_opens);
d00c28de 2671
3f9bcca7 2672 spin_lock(&cifs_tcp_ses_lock);
d00c28de 2673 list_add(&tcon->tcon_list, &ses->tcon_list);
3f9bcca7 2674 spin_unlock(&cifs_tcp_ses_lock);
d00c28de 2675
d03382ce
SJ		 2676 cifs_fscache_get_super_cookie(tcon);
2677
d00c28de
JL		 2678 return tcon;
2679
2680out_fail:
2681 tconInfoFree(tcon);
2682 return ERR_PTR(rc);
2683}
2684
9d002df4
JL		 2685void
2686cifs_put_tlink(struct tcon_link *tlink)
2687{
2688 if (!tlink || IS_ERR(tlink))
2689 return;
2690
2691 if (!atomic_dec_and_test(&tlink->tl_count) ||
2692 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2693 tlink->tl_time = jiffies;
2694 return;
2695 }
2696
2697 if (!IS_ERR(tlink_tcon(tlink)))
2698 cifs_put_tcon(tlink_tcon(tlink));
2699 kfree(tlink);
2700 return;
2701}
d00c28de 2702
25c7f41e 2703static inline struct tcon_link *
cd51875d
PS		 2704cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2705{
2706 return cifs_sb->master_tlink;
2707}
25c7f41e
PS		 2708
2709static int
2710compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2711{
2712 struct cifs_sb_info *old = CIFS_SB(sb);
2713 struct cifs_sb_info *new = mnt_data->cifs_sb;
2714
2715 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2716 return 0;
2717
2718 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2719 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2720 return 0;
2721
25c7f41e 2722 /*
5eba8ab3
JL		 2723 * We want to share sb only if we don't specify an r/wsize or
2724 * specified r/wsize is greater than or equal to existing one.
25c7f41e
PS		 2725 */
2726 if (new->wsize && new->wsize < old->wsize)
2727 return 0;
2728
5eba8ab3
JL		 2729 if (new->rsize && new->rsize < old->rsize)
2730 return 0;
2731
1f68233c 2732 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
25c7f41e
PS		 2733 return 0;
2734
2735 if (old->mnt_file_mode != new->mnt_file_mode ||
2736 old->mnt_dir_mode != new->mnt_dir_mode)
2737 return 0;
2738
2739 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2740 return 0;
2741
2742 if (old->actimeo != new->actimeo)
2743 return 0;
2744
2745 return 1;
2746}
2747
2748int
2749cifs_match_super(struct super_block *sb, void *data)
2750{
2751 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2752 struct smb_vol *volume_info;
2753 struct cifs_sb_info *cifs_sb;
2754 struct TCP_Server_Info *tcp_srv;
96daf2b0
SF		 2755 struct cifs_ses *ses;
2756 struct cifs_tcon *tcon;
25c7f41e 2757 struct tcon_link *tlink;
25c7f41e
PS		 2758 int rc = 0;
2759
25c7f41e
PS		 2760 spin_lock(&cifs_tcp_ses_lock);
2761 cifs_sb = CIFS_SB(sb);
2762 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2763 if (IS_ERR(tlink)) {
2764 spin_unlock(&cifs_tcp_ses_lock);
2765 return rc;
2766 }
2767 tcon = tlink_tcon(tlink);
2768 ses = tcon->ses;
2769 tcp_srv = ses->server;
2770
2771 volume_info = mnt_data->vol;
2772
9fa114f7 2773 if (!match_server(tcp_srv, volume_info) ||
25c7f41e
PS		 2774 !match_session(ses, volume_info) ||
2775 !match_tcon(tcon, volume_info->UNC)) {
2776 rc = 0;
2777 goto out;
2778 }
2779
2780 rc = compare_mount_options(sb, mnt_data);
2781out:
25c7f41e 2782 spin_unlock(&cifs_tcp_ses_lock);
f484b5d0 2783 cifs_put_tlink(tlink);
25c7f41e
PS		 2784 return rc;
2785}
2786
1da177e4 2787int
b669f33c 2788get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
2e6e02ab
PS		 2789 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2790 struct dfs_info3_param **referrals, int remap)
1da177e4
LT		 2791{
2792 char *temp_unc;
2793 int rc = 0;
2794
b669f33c 2795 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
2e6e02ab
PS		 2796 return -ENOSYS;
2797
2798 *num_referrals = 0;
2799 *referrals = NULL;
1da177e4 2800
2e6e02ab 2801 if (ses->ipc_tid == 0) {
1da177e4 2802 temp_unc = kmalloc(2 /* for slashes */ +
2e6e02ab
PS		 2803 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2804 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
1da177e4
LT		 2805 if (temp_unc == NULL)
2806 return -ENOMEM;
2807 temp_unc[0] = '\\';
2808 temp_unc[1] = '\\';
2e6e02ab
PS		 2809 strcpy(temp_unc + 2, ses->serverName);
2810 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2811 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2812 nls_codepage);
2813 cFYI(1, "Tcon rc = %d ipc_tid = %d", rc, ses->ipc_tid);
1da177e4
LT		 2814 kfree(temp_unc);
2815 }
2816 if (rc == 0)
b669f33c
PS		 2817 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2818 referrals, num_referrals,
2819 nls_codepage, remap);
2e6e02ab
PS		 2820 /*
2821 * BB - map targetUNCs to dfs_info3 structures, here or in
b669f33c 2822 * ses->server->ops->get_dfs_refer.
2e6e02ab 2823 */
1da177e4
LT		 2824
2825 return rc;
2826}
2827
09e50d55
JL		 2828#ifdef CONFIG_DEBUG_LOCK_ALLOC
2829static struct lock_class_key cifs_key[2];
2830static struct lock_class_key cifs_slock_key[2];
2831
2832static inline void
2833cifs_reclassify_socket4(struct socket *sock)
2834{
2835 struct sock *sk = sock->sk;
2836 BUG_ON(sock_owned_by_user(sk));
2837 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2838 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2839}
2840
2841static inline void
2842cifs_reclassify_socket6(struct socket *sock)
2843{
2844 struct sock *sk = sock->sk;
2845 BUG_ON(sock_owned_by_user(sk));
2846 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2847 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2848}
2849#else
2850static inline void
2851cifs_reclassify_socket4(struct socket *sock)
2852{
2853}
2854
2855static inline void
2856cifs_reclassify_socket6(struct socket *sock)
2857{
2858}
2859#endif
2860
1da177e4 2861/* See RFC1001 section 14 on representation of Netbios names */
50c2f753 2862static void rfc1002mangle(char *target, char *source, unsigned int length)
1da177e4 2863{
50c2f753 2864 unsigned int i, j;
1da177e4 2865
50c2f753 2866 for (i = 0, j = 0; i < (length); i++) {
1da177e4
LT		 2867 /* mask a nibble at a time and encode */
2868 target[j] = 'A' + (0x0F & (source[i] >> 4));
2869 target[j+1] = 'A' + (0x0F & source[i]);
50c2f753 2870 j += 2;
1da177e4
LT		 2871 }
2872
2873}
2874
3eb9a889
BG		 2875static int
2876bind_socket(struct TCP_Server_Info *server)
2877{
2878 int rc = 0;
2879 if (server->srcaddr.ss_family != AF_UNSPEC) {
2880 /* Bind to the specified local IP address */
2881 struct socket *socket = server->ssocket;
2882 rc = socket->ops->bind(socket,
2883 (struct sockaddr *) &server->srcaddr,
2884 sizeof(server->srcaddr));
2885 if (rc < 0) {
2886 struct sockaddr_in *saddr4;
2887 struct sockaddr_in6 *saddr6;
2888 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2889 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2890 if (saddr6->sin6_family == AF_INET6)
2891 cERROR(1, "cifs: "
ac3aa2f8 2892 "Failed to bind to: %pI6c, error: %d",
3eb9a889
BG		 2893 &saddr6->sin6_addr, rc);
2894 else
2895 cERROR(1, "cifs: "
ac3aa2f8 2896 "Failed to bind to: %pI4, error: %d",
3eb9a889
BG		 2897 &saddr4->sin_addr.s_addr, rc);
2898 }
2899 }
2900 return rc;
2901}
1da177e4
LT		 2902
2903static int
a9f1b85e 2904ip_rfc1001_connect(struct TCP_Server_Info *server)
1da177e4
LT		 2905{
2906 int rc = 0;
a9f1b85e
PS		 2907 /*
2908 * some servers require RFC1001 sessinit before sending
2909 * negprot - BB check reconnection in case where second
2910 * sessinit is sent but no second negprot
2911 */
2912 struct rfc1002_session_packet *ses_init_buf;
2913 struct smb_hdr *smb_buf;
2914 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2915 GFP_KERNEL);
2916 if (ses_init_buf) {
2917 ses_init_buf->trailer.session_req.called_len = 32;
2918
2919 if (server->server_RFC1001_name &&
2920 server->server_RFC1001_name[0] != 0)
2921 rfc1002mangle(ses_init_buf->trailer.
2922 session_req.called_name,
2923 server->server_RFC1001_name,
2924 RFC1001_NAME_LEN_WITH_NULL);
2925 else
2926 rfc1002mangle(ses_init_buf->trailer.
2927 session_req.called_name,
2928 DEFAULT_CIFS_CALLED_NAME,
2929 RFC1001_NAME_LEN_WITH_NULL);
2930
2931 ses_init_buf->trailer.session_req.calling_len = 32;
2932
2933 /*
2934 * calling name ends in null (byte 16) from old smb
2935 * convention.
2936 */
2937 if (server->workstation_RFC1001_name &&
2938 server->workstation_RFC1001_name[0] != 0)
2939 rfc1002mangle(ses_init_buf->trailer.
2940 session_req.calling_name,
2941 server->workstation_RFC1001_name,
2942 RFC1001_NAME_LEN_WITH_NULL);
2943 else
2944 rfc1002mangle(ses_init_buf->trailer.
2945 session_req.calling_name,
2946 "LINUX_CIFS_CLNT",
2947 RFC1001_NAME_LEN_WITH_NULL);
2948
2949 ses_init_buf->trailer.session_req.scope1 = 0;
2950 ses_init_buf->trailer.session_req.scope2 = 0;
2951 smb_buf = (struct smb_hdr *)ses_init_buf;
2952
2953 /* sizeof RFC1002_SESSION_REQUEST with no scope */
be8e3b00 2954 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
a9f1b85e
PS		 2955 rc = smb_send(server, smb_buf, 0x44);
2956 kfree(ses_init_buf);
2957 /*
2958 * RFC1001 layer in at least one server
2959 * requires very short break before negprot
2960 * presumably because not expecting negprot
2961 * to follow so fast. This is a simple
2962 * solution that works without
2963 * complicating the code and causes no
2964 * significant slowing down on mount
2965 * for everyone else
2966 */
2967 usleep_range(1000, 2000);
2968 }
2969 /*
2970 * else the negprot may still work without this
2971 * even though malloc failed
2972 */
2973
2974 return rc;
2975}
2976
2977static int
2978generic_ip_connect(struct TCP_Server_Info *server)
2979{
2980 int rc = 0;
6da97910 2981 __be16 sport;
a9f1b85e 2982 int slen, sfamily;
bcf4b106 2983 struct socket *socket = server->ssocket;
a9f1b85e
PS		 2984 struct sockaddr *saddr;
2985
2986 saddr = (struct sockaddr *) &server->dstaddr;
2987
2988 if (server->dstaddr.ss_family == AF_INET6) {
2989 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2990 slen = sizeof(struct sockaddr_in6);
2991 sfamily = AF_INET6;
2992 } else {
2993 sport = ((struct sockaddr_in *) saddr)->sin_port;
2994 slen = sizeof(struct sockaddr_in);
2995 sfamily = AF_INET;
2996 }
1da177e4 2997
bcf4b106 2998 if (socket == NULL) {
f1d0c998
RL		 2999 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
3000 IPPROTO_TCP, &socket, 1);
1da177e4 3001 if (rc < 0) {
b6b38f70 3002 cERROR(1, "Error %d creating socket", rc);
a9f1b85e 3003 server->ssocket = NULL;
1da177e4 3004 return rc;
1da177e4 3005 }
bcf4b106
JL		 3006
3007 /* BB other socket options to set KEEPALIVE, NODELAY? */
b6b38f70 3008 cFYI(1, "Socket created");
bcf4b106
JL		 3009 server->ssocket = socket;
3010 socket->sk->sk_allocation = GFP_NOFS;
a9f1b85e
PS		 3011 if (sfamily == AF_INET6)
3012 cifs_reclassify_socket6(socket);
3013 else
3014 cifs_reclassify_socket4(socket);
1da177e4
LT		 3015 }
3016
3eb9a889
BG		 3017 rc = bind_socket(server);
3018 if (rc < 0)
3019 return rc;
3020
bcf4b106
JL		 3021 /*
3022 * Eventually check for other socket options to change from
a9f1b85e
PS		 3023 * the default. sock_setsockopt not used because it expects
3024 * user space buffer
bcf4b106
JL		 3025 */
3026 socket->sk->sk_rcvtimeo = 7 * HZ;
da505c38 3027 socket->sk->sk_sndtimeo = 5 * HZ;
edf1ae40 3028
b387eaeb 3029 /* make the bufsizes depend on wsize/rsize and max requests */
bcf4b106
JL		 3030 if (server->noautotune) {
3031 if (socket->sk->sk_sndbuf < (200 * 1024))
3032 socket->sk->sk_sndbuf = 200 * 1024;
3033 if (socket->sk->sk_rcvbuf < (140 * 1024))
3034 socket->sk->sk_rcvbuf = 140 * 1024;
edf1ae40 3035 }
1da177e4 3036
6a5fa236 3037 if (server->tcp_nodelay) {
a9f1b85e 3038 int val = 1;
6a5fa236
SF		 3039 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
3040 (char *)&val, sizeof(val));
3041 if (rc)
b6b38f70 3042 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
6a5fa236
SF		 3043 }
3044
b6b38f70 3045 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
bcf4b106 3046 socket->sk->sk_sndbuf,
b6b38f70 3047 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
bcf4b106 3048
ee1b3ea9
JL		 3049 rc = socket->ops->connect(socket, saddr, slen, 0);
3050 if (rc < 0) {
3051 cFYI(1, "Error %d connecting to server", rc);
3052 sock_release(socket);
3053 server->ssocket = NULL;
3054 return rc;
3055 }
3056
a9f1b85e
PS		 3057 if (sport == htons(RFC1001_PORT))
3058 rc = ip_rfc1001_connect(server);
50c2f753 3059
1da177e4
LT		 3060 return rc;
3061}
3062
3063static int
a9f1b85e 3064ip_connect(struct TCP_Server_Info *server)
1da177e4 3065{
6da97910 3066 __be16 *sport;
a9f1b85e
PS		 3067 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3068 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
1da177e4 3069
a9f1b85e
PS		 3070 if (server->dstaddr.ss_family == AF_INET6)
3071 sport = &addr6->sin6_port;
3072 else
3073 sport = &addr->sin_port;
1da177e4 3074
a9f1b85e
PS		 3075 if (*sport == 0) {
3076 int rc;
1da177e4 3077
a9f1b85e
PS		 3078 /* try with 445 port at first */
3079 *sport = htons(CIFS_PORT);
3eb9a889 3080
a9f1b85e 3081 rc = generic_ip_connect(server);
1da177e4 3082 if (rc >= 0)
a9f1b85e 3083 return rc;
6a5fa236 3084
a9f1b85e
PS		 3085 /* if it failed, try with 139 port */
3086 *sport = htons(RFC1001_PORT);
6a5fa236
SF		 3087 }
3088
a9f1b85e 3089 return generic_ip_connect(server);
1da177e4
LT		 3090}
3091
6d5786a3 3092void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
2c6292ae 3093 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
8af18971
SF		 3094{
3095 /* if we are reconnecting then should we check to see if
3096 * any requested capabilities changed locally e.g. via
3097 * remount but we can not do much about it here
3098 * if they have (even if we could detect it by the following)
3099 * Perhaps we could add a backpointer to array of sb from tcon
3100 * or if we change to make all sb to same share the same
3101 * sb as NFS - then we only have one backpointer to sb.
3102 * What if we wanted to mount the server share twice once with
3103 * and once without posixacls or posix paths? */
3104 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
50c2f753 3105
c18c842b
SF		 3106 if (vol_info && vol_info->no_linux_ext) {
3107 tcon->fsUnixInfo.Capability = 0;
3108 tcon->unix_ext = 0; /* Unix Extensions disabled */
b6b38f70 3109 cFYI(1, "Linux protocol extensions disabled");
c18c842b
SF		 3110 return;
3111 } else if (vol_info)
3112 tcon->unix_ext = 1; /* Unix Extensions supported */
3113
3114 if (tcon->unix_ext == 0) {
b6b38f70 3115 cFYI(1, "Unix extensions disabled so not set on reconnect");
c18c842b
SF		 3116 return;
3117 }
50c2f753 3118
fb8c4b14 3119 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
8af18971 3120 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
6848b733 3121 cFYI(1, "unix caps which server supports %lld", cap);
8af18971
SF		 3122 /* check for reconnect case in which we do not
3123 want to change the mount behavior if we can avoid it */
fb8c4b14 3124 if (vol_info == NULL) {
50c2f753 3125 /* turn off POSIX ACL and PATHNAMES if not set
8af18971
SF		 3126 originally at mount time */
3127 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3128 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
11b6d645
IM		 3129 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3130 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
b6b38f70 3131 cERROR(1, "POSIXPATH support change");
8af18971 3132 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
11b6d645 3133 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
b6b38f70
JP		 3134 cERROR(1, "possible reconnect error");
3135 cERROR(1, "server disabled POSIX path support");
11b6d645 3136 }
8af18971 3137 }
50c2f753 3138
6848b733
SF		 3139 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3140 cERROR(1, "per-share encryption not supported yet");
3141
8af18971 3142 cap &= CIFS_UNIX_CAP_MASK;
75865f8c 3143 if (vol_info && vol_info->no_psx_acl)
8af18971 3144 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
75865f8c 3145 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
b6b38f70 3146 cFYI(1, "negotiated posix acl support");
2c6292ae
AV		 3147 if (cifs_sb)
3148 cifs_sb->mnt_cifs_flags |=
3149 CIFS_MOUNT_POSIXACL;
8af18971
SF		 3150 }
3151
75865f8c 3152 if (vol_info && vol_info->posix_paths == 0)
8af18971 3153 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
75865f8c 3154 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
b6b38f70 3155 cFYI(1, "negotiate posix pathnames");
2c6292ae
AV		 3156 if (cifs_sb)
3157 cifs_sb->mnt_cifs_flags |=
8af18971
SF		 3158 CIFS_MOUNT_POSIX_PATHS;
3159 }
50c2f753 3160
b6b38f70 3161 cFYI(1, "Negotiate caps 0x%x", (int)cap);
8af18971 3162#ifdef CONFIG_CIFS_DEBUG2
75865f8c 3163 if (cap & CIFS_UNIX_FCNTL_CAP)
b6b38f70 3164 cFYI(1, "FCNTL cap");
75865f8c 3165 if (cap & CIFS_UNIX_EXTATTR_CAP)
b6b38f70 3166 cFYI(1, "EXTATTR cap");
75865f8c 3167 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
b6b38f70 3168 cFYI(1, "POSIX path cap");
75865f8c 3169 if (cap & CIFS_UNIX_XATTR_CAP)
b6b38f70 3170 cFYI(1, "XATTR cap");
75865f8c 3171 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
b6b38f70 3172 cFYI(1, "POSIX ACL cap");
75865f8c 3173 if (cap & CIFS_UNIX_LARGE_READ_CAP)
b6b38f70 3174 cFYI(1, "very large read cap");
75865f8c 3175 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
b6b38f70 3176 cFYI(1, "very large write cap");
6848b733
SF		 3177 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
3178 cFYI(1, "transport encryption cap");
3179 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
3180 cFYI(1, "mandatory transport encryption cap");
8af18971
SF		 3181#endif /* CIFS_DEBUG2 */
3182 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
442aa310 3183 if (vol_info == NULL) {
b6b38f70 3184 cFYI(1, "resetting capabilities failed");
442aa310 3185 } else
b6b38f70 3186 cERROR(1, "Negotiating Unix capabilities "
ac3aa2f8
JL		 3187 "with the server failed. Consider "
3188 "mounting with the Unix Extensions "
3189 "disabled if problems are found "
5a44b319 3190 "by specifying the nounix mount "
b6b38f70 3191 "option.");
5a44b319 3192
8af18971
SF		 3193 }
3194 }
3195}
3196
724d9f1c
PS		 3197void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3198 struct cifs_sb_info *cifs_sb)
b1c8d2b4 3199{
2de970ff
JL		 3200 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3201
2ced6f69
AV		 3202 spin_lock_init(&cifs_sb->tlink_tree_lock);
3203 cifs_sb->tlink_tree = RB_ROOT;
3204
25c7f41e 3205 /*
5eba8ab3
JL		 3206 * Temporarily set r/wsize for matching superblock. If we end up using
3207 * new sb then client will later negotiate it downward if needed.
25c7f41e 3208 */
5eba8ab3 3209 cifs_sb->rsize = pvolume_info->rsize;
25c7f41e
PS		 3210 cifs_sb->wsize = pvolume_info->wsize;
3211
3b795210
SF		 3212 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3213 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3214 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3215 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
5206efd6 3216 cFYI(1, "file mode: 0x%hx dir mode: 0x%hx",
b6b38f70 3217 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
3b795210 3218
6d20e840 3219 cifs_sb->actimeo = pvolume_info->actimeo;
724d9f1c 3220 cifs_sb->local_nls = pvolume_info->local_nls;
6d20e840 3221
3b795210
SF		 3222 if (pvolume_info->noperm)
3223 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3224 if (pvolume_info->setuids)
3225 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3226 if (pvolume_info->server_ino)
3227 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3228 if (pvolume_info->remap)
3229 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3230 if (pvolume_info->no_xattr)
3231 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3232 if (pvolume_info->sfu_emul)
3233 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3234 if (pvolume_info->nobrl)
3235 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
be652445 3236 if (pvolume_info->nostrictsync)
4717bed6 3237 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
13a6e42a
SF		 3238 if (pvolume_info->mand_lock)
3239 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
d4ffff1f
PS		 3240 if (pvolume_info->rwpidforward)
3241 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
3b795210
SF		 3242 if (pvolume_info->cifs_acl)
3243 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
3c7c87fd 3244 if (pvolume_info->backupuid_specified) {
3d3ea8e6 3245 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
3c7c87fd
SP		 3246 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3247 }
3248 if (pvolume_info->backupgid_specified) {
3d3ea8e6 3249 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
3c7c87fd
SP		 3250 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3251 }
3b795210
SF		 3252 if (pvolume_info->override_uid)
3253 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3254 if (pvolume_info->override_gid)
3255 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3256 if (pvolume_info->dynperm)
3257 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
fa1df75d
SJ		 3258 if (pvolume_info->fsc)
3259 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
0eb8a132
JL		 3260 if (pvolume_info->multiuser)
3261 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3262 CIFS_MOUNT_NO_PERM);
d39454ff
PS		 3263 if (pvolume_info->strict_io)
3264 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
3b795210 3265 if (pvolume_info->direct_io) {
b6b38f70 3266 cFYI(1, "mounting share using direct i/o");
3b795210
SF		 3267 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3268 }
736a3320
SM		 3269 if (pvolume_info->mfsymlinks) {
3270 if (pvolume_info->sfu_emul) {
3271 cERROR(1, "mount option mfsymlinks ignored if sfu "
3272 "mount option is used");
3273 } else {
3274 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3275 }
3276 }
3b795210
SF		 3277
3278 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
b6b38f70
JP		 3279 cERROR(1, "mount option dynperm ignored if cifsacl "
3280 "mount option supported");
b1c8d2b4
JL		 3281}
3282
b9bce2e9
JL		 3283static void
3284cleanup_volume_info_contents(struct smb_vol *volume_info)
1bfe73c2 3285{
b946845a 3286 kfree(volume_info->username);
1bfe73c2 3287 kzfree(volume_info->password);
95c75454 3288 kfree(volume_info->UNC);
b946845a
SF		 3289 kfree(volume_info->domainname);
3290 kfree(volume_info->iocharset);
1bfe73c2 3291 kfree(volume_info->prepath);
b9bce2e9
JL		 3292}
3293
3294void
3295cifs_cleanup_volume_info(struct smb_vol *volume_info)
3296{
3297 if (!volume_info)
3298 return;
3299 cleanup_volume_info_contents(volume_info);
1bfe73c2 3300 kfree(volume_info);
1bfe73c2
IM		 3301}
3302
b9bce2e9 3303
2d6d589d 3304#ifdef CONFIG_CIFS_DFS_UPCALL
6d3ea7e4
SF		 3305/*
3306 * cifs_build_path_to_root returns full path to root when we do not have an
3307 * exiting connection (tcon)
3308 */
1bfe73c2 3309static char *
b2a0fa15 3310build_unc_path_to_root(const struct smb_vol *vol,
1bfe73c2
IM		 3311 const struct cifs_sb_info *cifs_sb)
3312{
b2a0fa15 3313 char *full_path, *pos;
839db3d1 3314 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
b2a0fa15 3315 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
1bfe73c2 3316
b2a0fa15 3317 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
1bfe73c2
IM		 3318 if (full_path == NULL)
3319 return ERR_PTR(-ENOMEM);
3320
b2a0fa15
JL		 3321 strncpy(full_path, vol->UNC, unc_len);
3322 pos = full_path + unc_len;
3323
3324 if (pplen) {
839db3d1 3325 *pos++ = CIFS_DIR_SEP(cifs_sb);
b2a0fa15
JL		 3326 strncpy(pos, vol->prepath, pplen);
3327 pos += pplen;
3328 }
3329
3330 *pos = '\0'; /* add trailing null */
f87d39d9 3331 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
b2a0fa15 3332 cFYI(1, "%s: full_path=%s", __func__, full_path);
1bfe73c2
IM		 3333 return full_path;
3334}
dd613945
SF		 3335
3336/*
3337 * Perform a dfs referral query for a share and (optionally) prefix
3338 *
046462ab
SF		 3339 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3340 * to a string containing updated options for the submount. Otherwise it
3341 * will be left untouched.
dd613945
SF		 3342 *
3343 * Returns the rc from get_dfs_path to the caller, which can be used to
3344 * determine whether there were referrals.
3345 */
3346static int
b669f33c 3347expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
dd613945 3348 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
046462ab 3349 int check_prefix)
dd613945
SF		 3350{
3351 int rc;
3352 unsigned int num_referrals = 0;
3353 struct dfs_info3_param *referrals = NULL;
3354 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3355
3356 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3357 if (IS_ERR(full_path))
3358 return PTR_ERR(full_path);
3359
3360 /* For DFS paths, skip the first '\' of the UNC */
3361 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3362
b669f33c 3363 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
dd613945
SF		 3364 &num_referrals, &referrals,
3365 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3366
3367 if (!rc && num_referrals > 0) {
3368 char *fake_devname = NULL;
3369
3370 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3371 full_path + 1, referrals,
3372 &fake_devname);
3373
3374 free_dfs_info_array(referrals, num_referrals);
046462ab 3375
dd613945
SF		 3376 if (IS_ERR(mdata)) {
3377 rc = PTR_ERR(mdata);
3378 mdata = NULL;
b9bce2e9
JL		 3379 } else {
3380 cleanup_volume_info_contents(volume_info);
b9bce2e9
JL		 3381 rc = cifs_setup_volume_info(volume_info, mdata,
3382 fake_devname);
dd613945 3383 }
b9bce2e9
JL		 3384 kfree(fake_devname);
3385 kfree(cifs_sb->mountdata);
046462ab 3386 cifs_sb->mountdata = mdata;
dd613945
SF		 3387 }
3388 kfree(full_path);
3389 return rc;
3390}
2d6d589d 3391#endif
1bfe73c2 3392
04db79b0
JL		 3393static int
3394cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3395 const char *devname)
1da177e4 3396{
724d9f1c 3397 int rc = 0;
1da177e4 3398
04db79b0
JL		 3399 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3400 return -EINVAL;
1da177e4 3401
7586b765 3402 if (volume_info->nullauth) {
04febabc
JL		 3403 cFYI(1, "Anonymous login");
3404 kfree(volume_info->username);
3405 volume_info->username = NULL;
7586b765 3406 } else if (volume_info->username) {
1da177e4 3407 /* BB fixme parse for domain name here */
b6b38f70 3408 cFYI(1, "Username: %s", volume_info->username);
1da177e4 3409 } else {
bf820679 3410 cifserror("No username specified");
50c2f753
SF		 3411 /* In userspace mount helper we can get user name from alternate
3412 locations such as env variables and files on disk */
04db79b0 3413 return -EINVAL;
1da177e4
LT		 3414 }
3415
1da177e4 3416 /* this is needed for ASCII cp to Unicode converts */
7586b765 3417 if (volume_info->iocharset == NULL) {
a5fc4ce0
JL		 3418 /* load_nls_default cannot return null */
3419 volume_info->local_nls = load_nls_default();
1da177e4 3420 } else {
a5fc4ce0
JL		 3421 volume_info->local_nls = load_nls(volume_info->iocharset);
3422 if (volume_info->local_nls == NULL) {
b6b38f70
JP		 3423 cERROR(1, "CIFS mount error: iocharset %s not found",
3424 volume_info->iocharset);
04db79b0 3425 return -ELIBACC;
1da177e4
LT		 3426 }
3427 }
724d9f1c 3428
724d9f1c
PS		 3429 return rc;
3430}
3431
04db79b0
JL		 3432struct smb_vol *
3433cifs_get_volume_info(char *mount_data, const char *devname)
3434{
3435 int rc;
3436 struct smb_vol *volume_info;
3437
6ee9542a 3438 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
04db79b0
JL		 3439 if (!volume_info)
3440 return ERR_PTR(-ENOMEM);
3441
3442 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3443 if (rc) {
3444 cifs_cleanup_volume_info(volume_info);
3445 volume_info = ERR_PTR(rc);
3446 }
3447
3448 return volume_info;
3449}
3450
724d9f1c 3451int
2c6292ae 3452cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
724d9f1c 3453{
1daaae8f 3454 int rc;
6d5786a3 3455 unsigned int xid;
af4281dc 3456 struct cifs_ses *ses;
96daf2b0 3457 struct cifs_tcon *tcon;
af4281dc 3458 struct TCP_Server_Info *server;
724d9f1c
PS		 3459 char *full_path;
3460 struct tcon_link *tlink;
3461#ifdef CONFIG_CIFS_DFS_UPCALL
3462 int referral_walks_count = 0;
20547490 3463#endif
dd854466
AV		 3464
3465 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3466 if (rc)
3467 return rc;
3468
20547490 3469#ifdef CONFIG_CIFS_DFS_UPCALL
724d9f1c
PS		 3470try_mount_again:
3471 /* cleanup activities if we're chasing a referral */
3472 if (referral_walks_count) {
3473 if (tcon)
3474 cifs_put_tcon(tcon);
af4281dc
PS		 3475 else if (ses)
3476 cifs_put_smb_ses(ses);
724d9f1c 3477
6d5786a3 3478 free_xid(xid);
724d9f1c
PS		 3479 }
3480#endif
1daaae8f 3481 rc = 0;
724d9f1c 3482 tcon = NULL;
af4281dc
PS		 3483 ses = NULL;
3484 server = NULL;
724d9f1c
PS		 3485 full_path = NULL;
3486 tlink = NULL;
3487
6d5786a3 3488 xid = get_xid();
1da177e4 3489
63c038c2 3490 /* get a reference to a tcp session */
af4281dc
PS		 3491 server = cifs_get_tcp_session(volume_info);
3492 if (IS_ERR(server)) {
3493 rc = PTR_ERR(server);
dd854466 3494 bdi_destroy(&cifs_sb->bdi);
63c038c2 3495 goto out;
1da177e4
LT		 3496 }
3497
36988c76 3498 /* get a reference to a SMB session */
af4281dc
PS		 3499 ses = cifs_get_smb_ses(server, volume_info);
3500 if (IS_ERR(ses)) {
3501 rc = PTR_ERR(ses);
3502 ses = NULL;
36988c76 3503 goto mount_fail_check;
1da177e4 3504 }
50c2f753 3505
d00c28de 3506 /* search for existing tcon to this server share */
af4281dc 3507 tcon = cifs_get_tcon(ses, volume_info);
d00c28de
JL		 3508 if (IS_ERR(tcon)) {
3509 rc = PTR_ERR(tcon);
3510 tcon = NULL;
1bfe73c2 3511 goto remote_path_check;
d00c28de 3512 }
1bfe73c2 3513
d82c2df5 3514 /* tell server which Unix caps we support */
29e20f9c 3515 if (cap_unix(tcon->ses)) {
d82c2df5
SF		 3516 /* reset of caps checks mount to see if unix extensions
3517 disabled for just this mount */
2c6292ae 3518 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
6848b733
SF		 3519 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3520 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3521 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3522 rc = -EACCES;
3523 goto mount_fail_check;
3524 }
3525 } else
d82c2df5 3526 tcon->unix_ext = 0; /* server does not support them */
c18c842b 3527
af4281dc
PS		 3528 /* do not care if a following call succeed - informational */
3529 if (!tcon->ipc && server->ops->qfs_tcon)
3530 server->ops->qfs_tcon(xid, tcon);
6848b733 3531
24985c53
PS		 3532 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3533 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
f7910cbd 3534
66bfaadc 3535 /* tune readahead according to rsize */
8f71465c 3536 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
f7910cbd 3537
1bfe73c2 3538remote_path_check:
c1508ca2
SF		 3539#ifdef CONFIG_CIFS_DFS_UPCALL
3540 /*
3541 * Perform an unconditional check for whether there are DFS
3542 * referrals for this path without prefix, to provide support
3543 * for DFS referrals from w2k8 servers which don't seem to respond
3544 * with PATH_NOT_COVERED to requests that include the prefix.
3545 * Chase the referral if found, otherwise continue normally.
3546 */
3547 if (referral_walks_count == 0) {
af4281dc
PS		 3548 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3549 false);
c1508ca2
SF		 3550 if (!refrc) {
3551 referral_walks_count++;
3552 goto try_mount_again;
3553 }
3554 }
3555#endif
3556
f87d39d9 3557 /* check if a whole path is not remote */
70945643 3558 if (!rc && tcon) {
68889f26
PS		 3559 if (!server->ops->is_path_accessible) {
3560 rc = -ENOSYS;
3561 goto mount_fail_check;
3562 }
6d3ea7e4
SF		 3563 /*
3564 * cifs_build_path_to_root works only when we have a valid tcon
3565 */
3566 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
e4cce94c
IM		 3567 if (full_path == NULL) {
3568 rc = -ENOMEM;
3569 goto mount_fail_check;
3570 }
68889f26
PS		 3571 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3572 full_path);
03ceace5 3573 if (rc != 0 && rc != -EREMOTE) {
e4cce94c
IM		 3574 kfree(full_path);
3575 goto mount_fail_check;
3576 }
3577 kfree(full_path);
3578 }
3579
1bfe73c2
IM		 3580 /* get referral if needed */
3581 if (rc == -EREMOTE) {
d036f50f 3582#ifdef CONFIG_CIFS_DFS_UPCALL
5c2503a8
IM		 3583 if (referral_walks_count > MAX_NESTED_LINKS) {
3584 /*
3585 * BB: when we implement proper loop detection,
3586 * we will remove this check. But now we need it
3587 * to prevent an indefinite loop if 'DFS tree' is
3588 * misconfigured (i.e. has loops).
3589 */
3590 rc = -ELOOP;
3591 goto mount_fail_check;
3592 }
1bfe73c2 3593
af4281dc 3594 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
7b91e266 3595
dd613945 3596 if (!rc) {
5c2503a8 3597 referral_walks_count++;
1bfe73c2
IM		 3598 goto try_mount_again;
3599 }
dd613945 3600 goto mount_fail_check;
d036f50f
SF		 3601#else /* No DFS support, return error on mount */
3602 rc = -EOPNOTSUPP;
3603#endif
1bfe73c2
IM		 3604 }
3605
9d002df4
JL		 3606 if (rc)
3607 goto mount_fail_check;
3608
3609 /* now, hang the tcon off of the superblock */
3610 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3611 if (tlink == NULL) {
3612 rc = -ENOMEM;
3613 goto mount_fail_check;
3614 }
3615
af4281dc 3616 tlink->tl_uid = ses->linux_uid;
9d002df4
JL		 3617 tlink->tl_tcon = tcon;
3618 tlink->tl_time = jiffies;
3619 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3620 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3621
b647c35f 3622 cifs_sb->master_tlink = tlink;
9d002df4 3623 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 3624 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
9d002df4 3625 spin_unlock(&cifs_sb->tlink_tree_lock);
413e661c 3626
da472fc8 3627 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 3628 TLINK_IDLE_EXPIRE);
3629
1bfe73c2
IM		 3630mount_fail_check:
3631 /* on error free sesinfo and tcon struct if needed */
3632 if (rc) {
1bfe73c2 3633 /* If find_unc succeeded then rc == 0 so we can not end */
25985edc 3634 /* up accidentally freeing someone elses tcon struct */
1bfe73c2
IM		 3635 if (tcon)
3636 cifs_put_tcon(tcon);
af4281dc
PS		 3637 else if (ses)
3638 cifs_put_smb_ses(ses);
1bfe73c2 3639 else
af4281dc 3640 cifs_put_tcp_session(server);
dd854466 3641 bdi_destroy(&cifs_sb->bdi);
1bfe73c2
IM		 3642 }
3643
70fe7dc0 3644out:
6d5786a3 3645 free_xid(xid);
1da177e4
LT		 3646 return rc;
3647}
3648
8d1bca32
JL		 3649/*
3650 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3651 * pointer may be NULL.
3652 */
1da177e4 3653int
2e6e02ab 3654CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
96daf2b0 3655 const char *tree, struct cifs_tcon *tcon,
1da177e4
LT		 3656 const struct nls_table *nls_codepage)
3657{
3658 struct smb_hdr *smb_buffer;
3659 struct smb_hdr *smb_buffer_response;
3660 TCONX_REQ *pSMB;
3661 TCONX_RSP *pSMBr;
3662 unsigned char *bcc_ptr;
3663 int rc = 0;
690c522f
JL		 3664 int length;
3665 __u16 bytes_left, count;
1da177e4
LT		 3666
3667 if (ses == NULL)
3668 return -EIO;
3669
3670 smb_buffer = cifs_buf_get();
ca43e3be 3671 if (smb_buffer == NULL)
1da177e4 3672 return -ENOMEM;
ca43e3be 3673
1da177e4
LT		 3674 smb_buffer_response = smb_buffer;
3675
3676 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3677 NULL /*no tid */ , 4 /*wct */ );
1982c344 3678
88257360 3679 smb_buffer->Mid = get_next_mid(ses->server);
1da177e4
LT		 3680 smb_buffer->Uid = ses->Suid;
3681 pSMB = (TCONX_REQ *) smb_buffer;
3682 pSMBr = (TCONX_RSP *) smb_buffer_response;
3683
3684 pSMB->AndXCommand = 0xFF;
3685 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
1da177e4 3686 bcc_ptr = &pSMB->Password[0];
8d1bca32 3687 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
eeac8047 3688 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
7c7b25bc 3689 *bcc_ptr = 0; /* password is null byte */
eeac8047 3690 bcc_ptr++; /* skip password */
7c7b25bc 3691 /* already aligned so no need to do it below */
eeac8047 3692 } else {
540b2e37 3693 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
eeac8047
SF		 3694 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3695 specified as required (when that support is added to
3696 the vfs in the future) as only NTLM or the much
7c7b25bc 3697 weaker LANMAN (which we do not send by default) is accepted
eeac8047
SF		 3698 by Samba (not sure whether other servers allow
3699 NTLMv2 password here) */
7c7b25bc 3700#ifdef CONFIG_CIFS_WEAK_PW_HASH
04912d6a 3701 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
00e485b0 3702 (ses->server->secType == LANMAN))
d3ba50b1 3703 calc_lanman_hash(tcon->password, ses->server->cryptkey,
96daf2b0 3704 ses->server->sec_mode &
4e53a3fb
JL		 3705 SECMODE_PW_ENCRYPT ? true : false,
3706 bcc_ptr);
7c7b25bc
SF		 3707 else
3708#endif /* CIFS_WEAK_PW_HASH */
ee2c9258 3709 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
9ef5992e 3710 bcc_ptr, nls_codepage);
eeac8047 3711
540b2e37 3712 bcc_ptr += CIFS_AUTH_RESP_SIZE;
fb8c4b14 3713 if (ses->capabilities & CAP_UNICODE) {
7c7b25bc
SF		 3714 /* must align unicode strings */
3715 *bcc_ptr = 0; /* null byte password */
3716 bcc_ptr++;
3717 }
eeac8047 3718 }
1da177e4 3719
96daf2b0 3720 if (ses->server->sec_mode &
a878fb22 3721 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1da177e4
LT		 3722 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3723
3724 if (ses->capabilities & CAP_STATUS32) {
3725 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3726 }
3727 if (ses->capabilities & CAP_DFS) {
3728 smb_buffer->Flags2 |= SMBFLG2_DFS;
3729 }
3730 if (ses->capabilities & CAP_UNICODE) {
3731 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3732 length =
acbbb76a 3733 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
50c2f753 3734 6 /* max utf8 char length in bytes */ *
a878fb22
SF		 3735 (/* server len*/ + 256 /* share len */), nls_codepage);
3736 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
1da177e4
LT		 3737 bcc_ptr += 2; /* skip trailing null */
3738 } else { /* ASCII */
1da177e4
LT		 3739 strcpy(bcc_ptr, tree);
3740 bcc_ptr += strlen(tree) + 1;
3741 }
3742 strcpy(bcc_ptr, "?????");
3743 bcc_ptr += strlen("?????");
3744 bcc_ptr += 1;
3745 count = bcc_ptr - &pSMB->Password[0];
be8e3b00
SF		 3746 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3747 pSMB->hdr.smb_buf_length) + count);
1da177e4
LT		 3748 pSMB->ByteCount = cpu_to_le16(count);
3749
133672ef 3750 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
7749981e 3751 0);
1da177e4 3752
1da177e4
LT		 3753 /* above now done in SendReceive */
3754 if ((rc == 0) && (tcon != NULL)) {
0e0d2cf3
SF		 3755 bool is_unicode;
3756
1da177e4 3757 tcon->tidStatus = CifsGood;
3b795210 3758 tcon->need_reconnect = false;
1da177e4
LT		 3759 tcon->tid = smb_buffer_response->Tid;
3760 bcc_ptr = pByteArea(smb_buffer_response);
690c522f 3761 bytes_left = get_bcc(smb_buffer_response);
cc20c031 3762 length = strnlen(bcc_ptr, bytes_left - 2);
0e0d2cf3
SF		 3763 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3764 is_unicode = true;
3765 else
3766 is_unicode = false;
3767
cc20c031 3768
50c2f753 3769 /* skip service field (NB: this field is always ASCII) */
7f8ed420
SF		 3770 if (length == 3) {
3771 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3772 (bcc_ptr[2] == 'C')) {
b6b38f70 3773 cFYI(1, "IPC connection");
7f8ed420
SF		 3774 tcon->ipc = 1;
3775 }
3776 } else if (length == 2) {
3777 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3778 /* the most common case */
b6b38f70 3779 cFYI(1, "disk share connection");
7f8ed420
SF		 3780 }
3781 }
50c2f753 3782 bcc_ptr += length + 1;
cc20c031 3783 bytes_left -= (length + 1);
1da177e4 3784 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
cc20c031
JL		 3785
3786 /* mostly informational -- no need to fail on error here */
90a98b2f 3787 kfree(tcon->nativeFileSystem);
acbbb76a 3788 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
0e0d2cf3 3789 bytes_left, is_unicode,
cc20c031
JL		 3790 nls_codepage);
3791
b6b38f70 3792 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
cc20c031 3793
fb8c4b14 3794 if ((smb_buffer_response->WordCount == 3) ||
1a4e15a0
SF		 3795 (smb_buffer_response->WordCount == 7))
3796 /* field is in same location */
3979877e
SF		 3797 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3798 else
3799 tcon->Flags = 0;
b6b38f70 3800 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
1da177e4 3801 } else if ((rc == 0) && tcon == NULL) {
50c2f753 3802 /* all we need to save for IPC$ connection */
1da177e4
LT		 3803 ses->ipc_tid = smb_buffer_response->Tid;
3804 }
3805
a8a11d39 3806 cifs_buf_release(smb_buffer);
1da177e4
LT		 3807 return rc;
3808}
3809
2a9b9951
AV		 3810void
3811cifs_umount(struct cifs_sb_info *cifs_sb)
1da177e4 3812{
b647c35f
JL		 3813 struct rb_root *root = &cifs_sb->tlink_tree;
3814 struct rb_node *node;
3815 struct tcon_link *tlink;
9d002df4 3816
2de970ff
JL		 3817 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3818
b647c35f
JL		 3819 spin_lock(&cifs_sb->tlink_tree_lock);
3820 while ((node = rb_first(root))) {
3821 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3822 cifs_get_tlink(tlink);
3823 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3824 rb_erase(node, root);
1da177e4 3825
b647c35f
JL		 3826 spin_unlock(&cifs_sb->tlink_tree_lock);
3827 cifs_put_tlink(tlink);
3828 spin_lock(&cifs_sb->tlink_tree_lock);
3829 }
3830 spin_unlock(&cifs_sb->tlink_tree_lock);
50c2f753 3831
dd854466 3832 bdi_destroy(&cifs_sb->bdi);
d757d71b
AV		 3833 kfree(cifs_sb->mountdata);
3834 unload_nls(cifs_sb->local_nls);
3835 kfree(cifs_sb);
50c2f753 3836}
1da177e4 3837
286170aa
PS		 3838int
3839cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
1da177e4
LT		 3840{
3841 int rc = 0;
198b5682 3842 struct TCP_Server_Info *server = ses->server;
1da177e4 3843
286170aa
PS		 3844 if (!server->ops->need_neg || !server->ops->negotiate)
3845 return -ENOSYS;
3846
198b5682 3847 /* only send once per connect */
286170aa 3848 if (!server->ops->need_neg(server))
198b5682
JL		 3849 return 0;
3850
45275789 3851 set_credits(server, 1);
286170aa
PS		 3852
3853 rc = server->ops->negotiate(xid, ses);
198b5682
JL		 3854 if (rc == 0) {
3855 spin_lock(&GlobalMid_Lock);
7fdbaa1b 3856 if (server->tcpStatus == CifsNeedNegotiate)
198b5682
JL		 3857 server->tcpStatus = CifsGood;
3858 else
3859 rc = -EHOSTDOWN;
3860 spin_unlock(&GlobalMid_Lock);
198b5682
JL		 3861 }
3862
3863 return rc;
3864}
3865
58c45c58
PS		 3866int
3867cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3868 struct nls_table *nls_info)
198b5682 3869{
58c45c58 3870 int rc = -ENOSYS;
198b5682 3871 struct TCP_Server_Info *server = ses->server;
26b994fa 3872
198b5682
JL		 3873 ses->flags = 0;
3874 ses->capabilities = server->capabilities;
26b994fa 3875 if (linuxExtEnabled == 0)
29e20f9c 3876 ses->capabilities &= (~server->vals->cap_unix);
20418acd 3877
b6b38f70 3878 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
96daf2b0 3879 server->sec_mode, server->capabilities, server->timeAdj);
cb7691b6 3880
58c45c58
PS		 3881 if (server->ops->sess_setup)
3882 rc = server->ops->sess_setup(xid, ses, nls_info);
3883
26b994fa 3884 if (rc) {
b6b38f70 3885 cERROR(1, "Send error in SessSetup = %d", rc);
26b994fa 3886 } else {
5d0d2882
SP		 3887 mutex_lock(&ses->server->srv_mutex);
3888 if (!server->session_estab) {
21e73393 3889 server->session_key.response = ses->auth_key.response;
5d0d2882 3890 server->session_key.len = ses->auth_key.len;
21e73393
SP		 3891 server->sequence_number = 0x2;
3892 server->session_estab = true;
3893 ses->auth_key.response = NULL;
5d0d2882
SP		 3894 }
3895 mutex_unlock(&server->srv_mutex);
3896
b6b38f70 3897 cFYI(1, "CIFS Session Established successfully");
20418acd 3898 spin_lock(&GlobalMid_Lock);
198b5682
JL		 3899 ses->status = CifsGood;
3900 ses->need_reconnect = false;
20418acd 3901 spin_unlock(&GlobalMid_Lock);
1da177e4 3902 }
26b994fa 3903
21e73393
SP		 3904 kfree(ses->auth_key.response);
3905 ses->auth_key.response = NULL;
3906 ses->auth_key.len = 0;
d3686d54
SP		 3907 kfree(ses->ntlmssp);
3908 ses->ntlmssp = NULL;
21e73393 3909
1da177e4
LT		 3910 return rc;
3911}
3912
8a8798a5
JL		 3913static int
3914cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3915{
3916 switch (ses->server->secType) {
3917 case Kerberos:
3918 vol->secFlg = CIFSSEC_MUST_KRB5;
3919 return 0;
3920 case NTLMv2:
3921 vol->secFlg = CIFSSEC_MUST_NTLMV2;
3922 break;
3923 case NTLM:
3924 vol->secFlg = CIFSSEC_MUST_NTLM;
3925 break;
3926 case RawNTLMSSP:
3927 vol->secFlg = CIFSSEC_MUST_NTLMSSP;
3928 break;
3929 case LANMAN:
3930 vol->secFlg = CIFSSEC_MUST_LANMAN;
3931 break;
3932 }
3933
3934 return cifs_set_cifscreds(vol, ses);
3935}
3936
96daf2b0 3937static struct cifs_tcon *
6d4a0832 3938cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
9d002df4 3939{
8a8798a5 3940 int rc;
96daf2b0
SF		 3941 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3942 struct cifs_ses *ses;
3943 struct cifs_tcon *tcon = NULL;
9d002df4 3944 struct smb_vol *vol_info;
9d002df4
JL		 3945
3946 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
803ab977
DC		 3947 if (vol_info == NULL)
3948 return ERR_PTR(-ENOMEM);
9d002df4 3949
9d002df4
JL		 3950 vol_info->local_nls = cifs_sb->local_nls;
3951 vol_info->linux_uid = fsuid;
3952 vol_info->cred_uid = fsuid;
3953 vol_info->UNC = master_tcon->treeName;
3954 vol_info->retry = master_tcon->retry;
3955 vol_info->nocase = master_tcon->nocase;
3956 vol_info->local_lease = master_tcon->local_lease;
3957 vol_info->no_linux_ext = !master_tcon->unix_ext;
3958
8a8798a5
JL		 3959 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3960 if (rc) {
3961 tcon = ERR_PTR(rc);
3962 goto out;
3963 }
9d002df4
JL		 3964
3965 /* get a reference for the same TCP session */
3f9bcca7 3966 spin_lock(&cifs_tcp_ses_lock);
9d002df4 3967 ++master_tcon->ses->server->srv_count;
3f9bcca7 3968 spin_unlock(&cifs_tcp_ses_lock);
9d002df4
JL		 3969
3970 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3971 if (IS_ERR(ses)) {
96daf2b0 3972 tcon = (struct cifs_tcon *)ses;
9d002df4
JL		 3973 cifs_put_tcp_session(master_tcon->ses->server);
3974 goto out;
3975 }
3976
3977 tcon = cifs_get_tcon(ses, vol_info);
3978 if (IS_ERR(tcon)) {
3979 cifs_put_smb_ses(ses);
3980 goto out;
3981 }
3982
29e20f9c 3983 if (cap_unix(ses))
9d002df4
JL		 3984 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3985out:
8a8798a5
JL		 3986 kfree(vol_info->username);
3987 kfree(vol_info->password);
9d002df4
JL		 3988 kfree(vol_info);
3989
3990 return tcon;
3991}
3992
96daf2b0 3993struct cifs_tcon *
9d002df4
JL		 3994cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3995{
3996 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3997}
3998
3999static int
4000cifs_sb_tcon_pending_wait(void *unused)
4001{
4002 schedule();
4003 return signal_pending(current) ? -ERESTARTSYS : 0;
4004}
4005
b647c35f
JL		 4006/* find and return a tlink with given uid */
4007static struct tcon_link *
6d4a0832 4008tlink_rb_search(struct rb_root *root, kuid_t uid)
b647c35f
JL		 4009{
4010 struct rb_node *node = root->rb_node;
4011 struct tcon_link *tlink;
4012
4013 while (node) {
4014 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
4015
6d4a0832 4016 if (uid_gt(tlink->tl_uid, uid))
b647c35f 4017 node = node->rb_left;
6d4a0832 4018 else if (uid_lt(tlink->tl_uid, uid))
b647c35f
JL		 4019 node = node->rb_right;
4020 else
4021 return tlink;
4022 }
4023 return NULL;
4024}
4025
4026/* insert a tcon_link into the tree */
4027static void
4028tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
4029{
4030 struct rb_node **new = &(root->rb_node), *parent = NULL;
4031 struct tcon_link *tlink;
4032
4033 while (*new) {
4034 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
4035 parent = *new;
4036
6d4a0832 4037 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
b647c35f
JL		 4038 new = &((*new)->rb_left);
4039 else
4040 new = &((*new)->rb_right);
4041 }
4042
4043 rb_link_node(&new_tlink->tl_rbnode, parent, new);
4044 rb_insert_color(&new_tlink->tl_rbnode, root);
4045}
4046
9d002df4
JL		 4047/*
4048 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
4049 * current task.
4050 *
4051 * If the superblock doesn't refer to a multiuser mount, then just return
4052 * the master tcon for the mount.
4053 *
6ef933a3 4054 * First, search the rbtree for an existing tcon for this fsuid. If one
9d002df4
JL		 4055 * exists, then check to see if it's pending construction. If it is then wait
4056 * for construction to complete. Once it's no longer pending, check to see if
4057 * it failed and either return an error or retry construction, depending on
4058 * the timeout.
4059 *
4060 * If one doesn't exist then insert a new tcon_link struct into the tree and
4061 * try to construct a new one.
4062 */
4063struct tcon_link *
4064cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4065{
4066 int ret;
6d4a0832 4067 kuid_t fsuid = current_fsuid();
9d002df4
JL		 4068 struct tcon_link *tlink, *newtlink;
4069
4070 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4071 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4072
4073 spin_lock(&cifs_sb->tlink_tree_lock);
b647c35f 4074 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4075 if (tlink)
4076 cifs_get_tlink(tlink);
4077 spin_unlock(&cifs_sb->tlink_tree_lock);
4078
4079 if (tlink == NULL) {
4080 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4081 if (newtlink == NULL)
4082 return ERR_PTR(-ENOMEM);
b647c35f 4083 newtlink->tl_uid = fsuid;
9d002df4
JL		 4084 newtlink->tl_tcon = ERR_PTR(-EACCES);
4085 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4086 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4087 cifs_get_tlink(newtlink);
4088
9d002df4
JL		 4089 spin_lock(&cifs_sb->tlink_tree_lock);
4090 /* was one inserted after previous search? */
b647c35f 4091 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
9d002df4
JL		 4092 if (tlink) {
4093 cifs_get_tlink(tlink);
4094 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4095 kfree(newtlink);
4096 goto wait_for_construction;
4097 }
9d002df4 4098 tlink = newtlink;
b647c35f
JL		 4099 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4100 spin_unlock(&cifs_sb->tlink_tree_lock);
9d002df4
JL		 4101 } else {
4102wait_for_construction:
4103 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4104 cifs_sb_tcon_pending_wait,
4105 TASK_INTERRUPTIBLE);
4106 if (ret) {
4107 cifs_put_tlink(tlink);
4108 return ERR_PTR(ret);
4109 }
4110
4111 /* if it's good, return it */
4112 if (!IS_ERR(tlink->tl_tcon))
4113 return tlink;
4114
4115 /* return error if we tried this already recently */
4116 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4117 cifs_put_tlink(tlink);
4118 return ERR_PTR(-EACCES);
4119 }
4120
4121 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4122 goto wait_for_construction;
4123 }
4124
4125 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4126 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4127 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4128
4129 if (IS_ERR(tlink->tl_tcon)) {
4130 cifs_put_tlink(tlink);
4131 return ERR_PTR(-EACCES);
4132 }
4133
4134 return tlink;
4135}
2de970ff
JL		 4136
4137/*
4138 * periodic workqueue job that scans tcon_tree for a superblock and closes
4139 * out tcons.
4140 */
4141static void
4142cifs_prune_tlinks(struct work_struct *work)
4143{
4144 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4145 prune_tlinks.work);
b647c35f
JL		 4146 struct rb_root *root = &cifs_sb->tlink_tree;
4147 struct rb_node *node = rb_first(root);
4148 struct rb_node *tmp;
4149 struct tcon_link *tlink;
2de970ff 4150
b647c35f
JL		 4151 /*
4152 * Because we drop the spinlock in the loop in order to put the tlink
4153 * it's not guarded against removal of links from the tree. The only
4154 * places that remove entries from the tree are this function and
4155 * umounts. Because this function is non-reentrant and is canceled
4156 * before umount can proceed, this is safe.
4157 */
4158 spin_lock(&cifs_sb->tlink_tree_lock);
4159 node = rb_first(root);
4160 while (node != NULL) {
4161 tmp = node;
4162 node = rb_next(tmp);
4163 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4164
4165 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4166 atomic_read(&tlink->tl_count) != 0 ||
4167 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4168 continue;
2de970ff 4169
b647c35f
JL		 4170 cifs_get_tlink(tlink);
4171 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4172 rb_erase(tmp, root);
4173
4174 spin_unlock(&cifs_sb->tlink_tree_lock);
4175 cifs_put_tlink(tlink);
4176 spin_lock(&cifs_sb->tlink_tree_lock);
4177 }
4178 spin_unlock(&cifs_sb->tlink_tree_lock);
2de970ff 4179
da472fc8 4180 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
2de970ff
JL		 4181 TLINK_IDLE_EXPIRE);
4182}
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