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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/connect.c
3 *
Steve French1080ef72011-02-24 18:07:19 +00004 * Copyright (C) International Business Machines Corp., 2002,2011
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * 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
Steve Frenchfb8c4b12007-07-10 01:16:18 +000019 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 */
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
Steve Frenchb8643e12005-04-28 22:41:07 -070031#include <linux/delay.h>
Steve Frenchf1914012005-08-18 09:37:34 -070032#include <linux/completion.h>
Igor Mammedovaaf737a2007-04-03 19:16:43 +000033#include <linux/kthread.h>
Steve French0ae0efa2005-10-10 10:57:19 -070034#include <linux/pagevec.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080035#include <linux/freezer.h>
Igor Mammedov5c2503a2009-04-21 19:31:05 +040036#include <linux/namei.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <asm/uaccess.h>
38#include <asm/processor.h>
Jeff Layton50b64e32009-06-02 06:55:20 -040039#include <linux/inet.h>
Paul Gortmaker143cb492011-07-01 14:23:34 -040040#include <linux/module.h>
Jeff Layton8a8798a2012-01-17 16:09:15 -050041#include <keys/user-type.h>
Steve French0e2beda2009-01-30 21:24:41 +000042#include <net/ipv6.h>
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040043#include <linux/parser.h>
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#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"
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +053054#include "fscache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
56#define CIFS_PORT 445
57#define RFC1001_PORT 139
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059extern mempool_t *cifs_req_poolp;
60
Jeff Layton2de970f2010-10-06 19:51:12 -040061/* FIXME: should these be tunable? */
Jeff Layton9d002df2010-10-06 19:51:11 -040062#define TLINK_ERROR_EXPIRE (1 * HZ)
Jeff Layton2de970f2010-10-06 19:51:12 -040063#define TLINK_IDLE_EXPIRE (600 * HZ)
Jeff Layton9d002df2010-10-06 19:51:11 -040064
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040065enum {
66
67 /* Mount options that take no arguments */
68 Opt_user_xattr, Opt_nouser_xattr,
69 Opt_forceuid, Opt_noforceuid,
Jeff Layton72bd4812012-10-03 16:02:36 -040070 Opt_forcegid, Opt_noforcegid,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040071 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,
Jeff Layton1b359202012-09-19 15:20:27 -070086 Opt_sign, Opt_seal, Opt_noac,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040087 Opt_fsc, Opt_mfsymlinks,
Jeff Laytond8162552012-03-23 14:40:56 -040088 Opt_multiuser, Opt_sloppy,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040089
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,
Jeff Layton73a999f2013-03-22 08:42:57 -040098 Opt_domain, Opt_srcaddr, Opt_iocharset,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -040099 Opt_netbiosname, Opt_servern,
Jeff Layton23db65f2012-05-15 12:20:51 -0400100 Opt_ver, Opt_vers, Opt_sec, Opt_cache,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400101
102 /* Mount options to be ignored */
103 Opt_ignore,
104
105 /* Options which could be blank */
106 Opt_blank_pass,
Sachin Prabhu4fe9e962012-04-10 18:12:27 +0100107 Opt_blank_user,
108 Opt_blank_ip,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400109
110 Opt_err
111};
112
113static const match_table_t cifs_mount_option_tokens = {
114
115 { Opt_user_xattr, "user_xattr" },
116 { Opt_nouser_xattr, "nouser_xattr" },
117 { Opt_forceuid, "forceuid" },
118 { Opt_noforceuid, "noforceuid" },
Jeff Layton72bd4812012-10-03 16:02:36 -0400119 { Opt_forcegid, "forcegid" },
120 { Opt_noforcegid, "noforcegid" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400121 { Opt_noblocksend, "noblocksend" },
122 { Opt_noautotune, "noautotune" },
123 { Opt_hard, "hard" },
124 { Opt_soft, "soft" },
125 { Opt_perm, "perm" },
126 { Opt_noperm, "noperm" },
127 { Opt_mapchars, "mapchars" },
128 { Opt_nomapchars, "nomapchars" },
129 { Opt_sfu, "sfu" },
130 { Opt_nosfu, "nosfu" },
131 { Opt_nodfs, "nodfs" },
132 { Opt_posixpaths, "posixpaths" },
133 { Opt_noposixpaths, "noposixpaths" },
134 { Opt_nounix, "nounix" },
135 { Opt_nounix, "nolinux" },
136 { Opt_nocase, "nocase" },
137 { Opt_nocase, "ignorecase" },
138 { Opt_brl, "brl" },
139 { Opt_nobrl, "nobrl" },
140 { Opt_nobrl, "nolock" },
141 { Opt_forcemandatorylock, "forcemandatorylock" },
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +0400142 { Opt_forcemandatorylock, "forcemand" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400143 { Opt_setuids, "setuids" },
144 { Opt_nosetuids, "nosetuids" },
145 { Opt_dynperm, "dynperm" },
146 { Opt_nodynperm, "nodynperm" },
147 { Opt_nohard, "nohard" },
148 { Opt_nosoft, "nosoft" },
149 { Opt_nointr, "nointr" },
150 { Opt_intr, "intr" },
151 { Opt_nostrictsync, "nostrictsync" },
152 { Opt_strictsync, "strictsync" },
153 { Opt_serverino, "serverino" },
154 { Opt_noserverino, "noserverino" },
155 { Opt_rwpidforward, "rwpidforward" },
156 { Opt_cifsacl, "cifsacl" },
157 { Opt_nocifsacl, "nocifsacl" },
158 { Opt_acl, "acl" },
159 { Opt_noacl, "noacl" },
160 { Opt_locallease, "locallease" },
161 { Opt_sign, "sign" },
162 { Opt_seal, "seal" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400163 { Opt_noac, "noac" },
164 { Opt_fsc, "fsc" },
165 { Opt_mfsymlinks, "mfsymlinks" },
166 { Opt_multiuser, "multiuser" },
Jeff Laytond8162552012-03-23 14:40:56 -0400167 { Opt_sloppy, "sloppy" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400168
169 { Opt_backupuid, "backupuid=%s" },
170 { Opt_backupgid, "backupgid=%s" },
171 { Opt_uid, "uid=%s" },
172 { Opt_cruid, "cruid=%s" },
173 { Opt_gid, "gid=%s" },
174 { Opt_file_mode, "file_mode=%s" },
175 { Opt_dirmode, "dirmode=%s" },
176 { Opt_dirmode, "dir_mode=%s" },
177 { Opt_port, "port=%s" },
178 { Opt_rsize, "rsize=%s" },
179 { Opt_wsize, "wsize=%s" },
180 { Opt_actimeo, "actimeo=%s" },
181
Sachin Prabhu4fe9e962012-04-10 18:12:27 +0100182 { Opt_blank_user, "user=" },
183 { Opt_blank_user, "username=" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400184 { Opt_user, "user=%s" },
185 { Opt_user, "username=%s" },
186 { Opt_blank_pass, "pass=" },
Jesper Nilsson3c15b4c2012-11-29 17:31:16 +0100187 { Opt_blank_pass, "password=" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400188 { Opt_pass, "pass=%s" },
189 { Opt_pass, "password=%s" },
Sachin Prabhu4fe9e962012-04-10 18:12:27 +0100190 { Opt_blank_ip, "ip=" },
191 { Opt_blank_ip, "addr=" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400192 { Opt_ip, "ip=%s" },
193 { Opt_ip, "addr=%s" },
Jeff Layton73a999f2013-03-22 08:42:57 -0400194 { Opt_ignore, "unc=%s" },
195 { Opt_ignore, "target=%s" },
196 { Opt_ignore, "path=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400197 { Opt_domain, "dom=%s" },
198 { Opt_domain, "domain=%s" },
199 { Opt_domain, "workgroup=%s" },
200 { Opt_srcaddr, "srcaddr=%s" },
Jeff Layton73a999f2013-03-22 08:42:57 -0400201 { Opt_ignore, "prefixpath=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400202 { Opt_iocharset, "iocharset=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400203 { Opt_netbiosname, "netbiosname=%s" },
204 { Opt_servern, "servern=%s" },
205 { Opt_ver, "ver=%s" },
Jeff Layton23db65f2012-05-15 12:20:51 -0400206 { Opt_vers, "vers=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400207 { Opt_sec, "sec=%s" },
Jeff Layton15b6a472012-05-16 07:50:15 -0400208 { Opt_cache, "cache=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400209
210 { Opt_ignore, "cred" },
211 { Opt_ignore, "credentials" },
Jeff Laytona557b972012-05-02 14:02:40 -0400212 { Opt_ignore, "cred=%s" },
213 { Opt_ignore, "credentials=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400214 { Opt_ignore, "guest" },
215 { Opt_ignore, "rw" },
216 { Opt_ignore, "ro" },
217 { Opt_ignore, "suid" },
218 { Opt_ignore, "nosuid" },
219 { Opt_ignore, "exec" },
220 { Opt_ignore, "noexec" },
221 { Opt_ignore, "nodev" },
222 { Opt_ignore, "noauto" },
223 { Opt_ignore, "dev" },
224 { Opt_ignore, "mand" },
225 { Opt_ignore, "nomand" },
226 { Opt_ignore, "_netdev" },
227
228 { Opt_err, NULL }
229};
230
231enum {
232 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
233 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
Jeff Layton76596242012-07-23 20:34:17 -0400234 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
235 Opt_sec_ntlmv2i, Opt_sec_lanman,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400236 Opt_sec_none,
237
238 Opt_sec_err
239};
240
241static const match_table_t cifs_secflavor_tokens = {
242 { Opt_sec_krb5, "krb5" },
243 { Opt_sec_krb5i, "krb5i" },
244 { Opt_sec_krb5p, "krb5p" },
245 { Opt_sec_ntlmsspi, "ntlmsspi" },
246 { Opt_sec_ntlmssp, "ntlmssp" },
247 { Opt_ntlm, "ntlm" },
248 { Opt_sec_ntlmi, "ntlmi" },
Jeff Layton76596242012-07-23 20:34:17 -0400249 { Opt_sec_ntlmv2, "nontlm" },
250 { Opt_sec_ntlmv2, "ntlmv2" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400251 { Opt_sec_ntlmv2i, "ntlmv2i" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400252 { Opt_sec_lanman, "lanman" },
253 { Opt_sec_none, "none" },
254
255 { Opt_sec_err, NULL }
256};
257
Jeff Layton15b6a472012-05-16 07:50:15 -0400258/* cache flavors */
259enum {
260 Opt_cache_loose,
261 Opt_cache_strict,
262 Opt_cache_none,
263 Opt_cache_err
264};
265
266static const match_table_t cifs_cacheflavor_tokens = {
267 { Opt_cache_loose, "loose" },
268 { Opt_cache_strict, "strict" },
269 { Opt_cache_none, "none" },
270 { Opt_cache_err, NULL }
271};
272
Jeff Layton23db65f2012-05-15 12:20:51 -0400273static const match_table_t cifs_smb_version_tokens = {
274 { Smb_1, SMB1_VERSION_STRING },
Steve Frenchdd446b12012-11-28 23:21:06 -0600275 { Smb_20, SMB20_VERSION_STRING},
Steve French1080ef72011-02-24 18:07:19 +0000276 { Smb_21, SMB21_VERSION_STRING },
Steve Frenche4aa25e2012-10-01 12:26:22 -0500277 { Smb_30, SMB30_VERSION_STRING },
Jeff Layton23db65f2012-05-15 12:20:51 -0400278};
279
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300280static int ip_connect(struct TCP_Server_Info *server);
281static int generic_ip_connect(struct TCP_Server_Info *server);
Jeff Laytonb647c352010-10-28 11:16:44 -0400282static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
Jeff Layton2de970f2010-10-06 19:51:12 -0400283static void cifs_prune_tlinks(struct work_struct *work);
Jeff Laytonb9bce2e2011-07-06 08:10:39 -0400284static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
285 const char *devname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Jeff Laytond5c56052008-12-01 18:42:33 -0500287/*
288 * cifs tcp session reconnection
289 *
290 * mark tcp session as reconnecting so temporarily locked
291 * mark all smb sessions as reconnecting for tcp session
292 * reconnect tcp session
293 * wake up waiters on reconnection? - (not needed currently)
294 */
Pavel Shilovsky28ea5292012-05-23 16:18:00 +0400295int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296cifs_reconnect(struct TCP_Server_Info *server)
297{
298 int rc = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500299 struct list_head *tmp, *tmp2;
Steve French96daf2b2011-05-27 04:34:02 +0000300 struct cifs_ses *ses;
301 struct cifs_tcon *tcon;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000302 struct mid_q_entry *mid_entry;
Jeff Layton3c1105d2011-05-22 07:09:13 -0400303 struct list_head retry_list;
Steve French50c2f752007-07-13 00:33:32 +0000304
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000306 if (server->tcpStatus == CifsExiting) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000307 /* the demux thread will exit normally
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 next time through the loop */
309 spin_unlock(&GlobalMid_Lock);
310 return rc;
311 } else
312 server->tcpStatus = CifsNeedReconnect;
313 spin_unlock(&GlobalMid_Lock);
314 server->maxBuf = 0;
Pavel Shilovskyaa24d1e2011-12-27 16:23:34 +0400315#ifdef CONFIG_CIFS_SMB2
316 server->max_read = 0;
317#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
Joe Perchesf96637b2013-05-04 22:12:25 -0500319 cifs_dbg(FYI, "Reconnecting tcp session\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321 /* before reconnecting the tcp session, mark the smb session (uid)
322 and the tid bad so they are not used until reconnected */
Joe Perchesf96637b2013-05-04 22:12:25 -0500323 cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n",
324 __func__);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530325 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -0500326 list_for_each(tmp, &server->smb_ses_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000327 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
Jeff Layton14fbf502008-11-14 13:53:46 -0500328 ses->need_reconnect = true;
329 ses->ipc_tid = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500330 list_for_each(tmp2, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000331 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500332 tcon->need_reconnect = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530335 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500336
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 /* do not want to be sending data on a socket we are freeing */
Joe Perchesf96637b2013-05-04 22:12:25 -0500338 cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
Jeff Layton72ca5452008-12-01 07:09:36 -0500339 mutex_lock(&server->srv_mutex);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000340 if (server->ssocket) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500341 cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n",
342 server->ssocket->state, server->ssocket->flags);
Trond Myklebust91cf45f2007-11-12 18:10:39 -0800343 kernel_sock_shutdown(server->ssocket, SHUT_WR);
Joe Perchesf96637b2013-05-04 22:12:25 -0500344 cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n",
345 server->ssocket->state, server->ssocket->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 sock_release(server->ssocket);
347 server->ssocket = NULL;
348 }
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500349 server->sequence_number = 0;
350 server->session_estab = false;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500351 kfree(server->session_key.response);
352 server->session_key.response = NULL;
353 server->session_key.len = 0;
Steve Frenchfda35942011-01-20 18:06:34 +0000354 server->lstrp = jiffies;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500355 mutex_unlock(&server->srv_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500357 /* mark submitted MIDs for retry and issue callback */
Jeff Layton3c1105d2011-05-22 07:09:13 -0400358 INIT_LIST_HEAD(&retry_list);
Joe Perchesf96637b2013-05-04 22:12:25 -0500359 cifs_dbg(FYI, "%s: moving mids to private list\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 spin_lock(&GlobalMid_Lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500361 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
362 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400363 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
364 mid_entry->mid_state = MID_RETRY_NEEDED;
Jeff Layton3c1105d2011-05-22 07:09:13 -0400365 list_move(&mid_entry->qhead, &retry_list);
366 }
367 spin_unlock(&GlobalMid_Lock);
368
Joe Perchesf96637b2013-05-04 22:12:25 -0500369 cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
Jeff Layton3c1105d2011-05-22 07:09:13 -0400370 list_for_each_safe(tmp, tmp2, &retry_list) {
371 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500372 list_del_init(&mid_entry->qhead);
373 mid_entry->callback(mid_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Jeff Layton7fdbaa12011-06-10 16:14:57 -0400376 do {
Steve French6c3d8902006-07-31 22:46:20 +0000377 try_to_freeze();
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300378
379 /* we should try only the port we connected to before */
380 rc = generic_ip_connect(server);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000381 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500382 cifs_dbg(FYI, "reconnect error %d\n", rc);
Steve French0cb766a2005-04-28 22:41:11 -0700383 msleep(3000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 } else {
385 atomic_inc(&tcpSesReconnectCount);
386 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000387 if (server->tcpStatus != CifsExiting)
Steve Frenchfd88ce92011-04-12 01:01:14 +0000388 server->tcpStatus = CifsNeedNegotiate;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000389 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 }
Jeff Layton7fdbaa12011-06-10 16:14:57 -0400391 } while (server->tcpStatus == CifsNeedReconnect);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 return rc;
394}
395
Jeff Laytonc74093b2011-01-11 07:24:23 -0500396static void
397cifs_echo_request(struct work_struct *work)
398{
399 int rc;
400 struct TCP_Server_Info *server = container_of(work,
401 struct TCP_Server_Info, echo.work);
402
Jeff Layton247ec9b2011-02-04 17:09:50 -0500403 /*
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400404 * We cannot send an echo if it is disabled or until the
405 * NEGOTIATE_PROTOCOL request is done, which is indicated by
406 * server->ops->need_neg() == true. Also, no need to ping if
407 * we got a response recently.
Jeff Layton247ec9b2011-02-04 17:09:50 -0500408 */
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400409 if (!server->ops->need_neg || server->ops->need_neg(server) ||
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400410 (server->ops->can_echo && !server->ops->can_echo(server)) ||
Jeff Layton247ec9b2011-02-04 17:09:50 -0500411 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
Jeff Laytonc74093b2011-01-11 07:24:23 -0500412 goto requeue_echo;
413
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400414 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
Jeff Laytonc74093b2011-01-11 07:24:23 -0500415 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -0500416 cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
417 server->hostname);
Jeff Laytonc74093b2011-01-11 07:24:23 -0500418
419requeue_echo:
Jeff Laytonda472fc2012-03-23 14:40:53 -0400420 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
Jeff Laytonc74093b2011-01-11 07:24:23 -0500421}
422
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400423static bool
Jeff Layton2a37ef92011-10-19 15:29:23 -0400424allocate_buffers(struct TCP_Server_Info *server)
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400425{
Jeff Layton2a37ef92011-10-19 15:29:23 -0400426 if (!server->bigbuf) {
427 server->bigbuf = (char *)cifs_buf_get();
428 if (!server->bigbuf) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500429 cifs_dbg(VFS, "No memory for large SMB response\n");
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400430 msleep(3000);
431 /* retry will check if exiting */
432 return false;
433 }
Jeff Layton2a37ef92011-10-19 15:29:23 -0400434 } else if (server->large_buf) {
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400435 /* we are reusing a dirty large buf, clear its start */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400436 memset(server->bigbuf, 0, HEADER_SIZE(server));
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400437 }
438
Jeff Layton2a37ef92011-10-19 15:29:23 -0400439 if (!server->smallbuf) {
440 server->smallbuf = (char *)cifs_small_buf_get();
441 if (!server->smallbuf) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500442 cifs_dbg(VFS, "No memory for SMB response\n");
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400443 msleep(1000);
444 /* retry will check if exiting */
445 return false;
446 }
447 /* beginning of smb buffer is cleared in our buf_get */
448 } else {
449 /* if existing small buf clear beginning */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400450 memset(server->smallbuf, 0, HEADER_SIZE(server));
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400451 }
452
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400453 return true;
454}
455
Jeff Laytonba749e62011-10-11 06:41:32 -0400456static bool
457server_unresponsive(struct TCP_Server_Info *server)
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400458{
Pavel Shilovsky6dae51a2012-02-21 16:50:23 +0300459 /*
460 * We need to wait 2 echo intervals to make sure we handle such
461 * situations right:
462 * 1s client sends a normal SMB request
463 * 2s client gets a response
464 * 30s echo workqueue job pops, and decides we got a response recently
465 * and don't need to send another
466 * ...
467 * 65s kernel_recvmsg times out, and we see that we haven't gotten
468 * a response in >60s.
469 */
470 if (server->tcpStatus == CifsGood &&
471 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500472 cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n",
473 server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ);
Jeff Laytonba749e62011-10-11 06:41:32 -0400474 cifs_reconnect(server);
475 wake_up(&server->response_q);
476 return true;
477 }
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400478
Jeff Laytonba749e62011-10-11 06:41:32 -0400479 return false;
480}
481
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400482/*
483 * kvec_array_init - clone a kvec array, and advance into it
484 * @new: pointer to memory for cloned array
485 * @iov: pointer to original array
486 * @nr_segs: number of members in original array
487 * @bytes: number of bytes to advance into the cloned array
488 *
489 * This function will copy the array provided in iov to a section of memory
490 * and advance the specified number of bytes into the new array. It returns
491 * the number of segments in the new array. "new" must be at least as big as
492 * the original iov array.
493 */
494static unsigned int
495kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
496 size_t bytes)
497{
498 size_t base = 0;
499
500 while (bytes || !iov->iov_len) {
501 int copy = min(bytes, iov->iov_len);
502
503 bytes -= copy;
504 base += copy;
505 if (iov->iov_len == base) {
506 iov++;
507 nr_segs--;
508 base = 0;
509 }
510 }
511 memcpy(new, iov, sizeof(*iov) * nr_segs);
512 new->iov_base += base;
513 new->iov_len -= base;
514 return nr_segs;
515}
516
Jeff Layton1041e3f2011-10-19 15:28:27 -0400517static struct kvec *
518get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
519{
520 struct kvec *new_iov;
521
522 if (server->iov && nr_segs <= server->nr_iov)
523 return server->iov;
524
525 /* not big enough -- allocate a new one and release the old */
526 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
527 if (new_iov) {
528 kfree(server->iov);
529 server->iov = new_iov;
530 server->nr_iov = nr_segs;
531 }
532 return new_iov;
533}
534
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400535int
536cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
537 unsigned int nr_segs, unsigned int to_read)
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400538{
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400539 int length = 0;
540 int total_read;
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400541 unsigned int segs;
Jeff Laytone831e6c2011-10-11 06:41:32 -0400542 struct msghdr smb_msg;
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400543 struct kvec *iov;
544
Jeff Layton1041e3f2011-10-19 15:28:27 -0400545 iov = get_server_iovec(server, nr_segs);
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400546 if (!iov)
547 return -ENOMEM;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400548
Jeff Laytone831e6c2011-10-11 06:41:32 -0400549 smb_msg.msg_control = NULL;
550 smb_msg.msg_controllen = 0;
551
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400552 for (total_read = 0; to_read; total_read += length, to_read -= length) {
Jeff Layton95edcff2011-12-01 20:22:41 -0500553 try_to_freeze();
554
Jeff Laytonba749e62011-10-11 06:41:32 -0400555 if (server_unresponsive(server)) {
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400556 total_read = -EAGAIN;
Jeff Laytonba749e62011-10-11 06:41:32 -0400557 break;
558 }
559
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400560 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
561
562 length = kernel_recvmsg(server->ssocket, &smb_msg,
563 iov, segs, to_read, 0);
564
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400565 if (server->tcpStatus == CifsExiting) {
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400566 total_read = -ESHUTDOWN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400567 break;
568 } else if (server->tcpStatus == CifsNeedReconnect) {
569 cifs_reconnect(server);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400570 total_read = -EAGAIN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400571 break;
572 } else if (length == -ERESTARTSYS ||
573 length == -EAGAIN ||
574 length == -EINTR) {
575 /*
576 * Minimum sleep to prevent looping, allowing socket
577 * to clear and app threads to set tcpStatus
578 * CifsNeedReconnect if server hung.
579 */
580 usleep_range(1000, 2000);
581 length = 0;
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400582 continue;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400583 } else if (length <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500584 cifs_dbg(FYI, "Received no data or error: expecting %d\n"
585 "got %d", to_read, length);
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400586 cifs_reconnect(server);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400587 total_read = -EAGAIN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400588 break;
589 }
590 }
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400591 return total_read;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400592}
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400593
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400594int
595cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
596 unsigned int to_read)
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400597{
598 struct kvec iov;
599
600 iov.iov_base = buf;
601 iov.iov_len = to_read;
602
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400603 return cifs_readv_from_socket(server, &iov, 1, to_read);
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400604}
605
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400606static bool
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400607is_smb_response(struct TCP_Server_Info *server, unsigned char type)
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400608{
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400609 /*
610 * The first byte big endian of the length field,
611 * is actually not part of the length but the type
612 * with the most common, zero, as regular data.
613 */
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400614 switch (type) {
615 case RFC1002_SESSION_MESSAGE:
616 /* Regular SMB response */
617 return true;
618 case RFC1002_SESSION_KEEP_ALIVE:
Joe Perchesf96637b2013-05-04 22:12:25 -0500619 cifs_dbg(FYI, "RFC 1002 session keep alive\n");
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400620 break;
621 case RFC1002_POSITIVE_SESSION_RESPONSE:
Joe Perchesf96637b2013-05-04 22:12:25 -0500622 cifs_dbg(FYI, "RFC 1002 positive session response\n");
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400623 break;
624 case RFC1002_NEGATIVE_SESSION_RESPONSE:
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400625 /*
626 * We get this from Windows 98 instead of an error on
627 * SMB negprot response.
628 */
Joe Perchesf96637b2013-05-04 22:12:25 -0500629 cifs_dbg(FYI, "RFC 1002 negative session response\n");
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400630 /* give server a second to clean up */
631 msleep(1000);
632 /*
633 * Always try 445 first on reconnect since we get NACK
634 * on some if we ever connected to port 139 (the NACK
635 * is since we do not begin with RFC1001 session
636 * initialize frame).
637 */
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400638 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400639 cifs_reconnect(server);
640 wake_up(&server->response_q);
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400641 break;
642 default:
Joe Perchesf96637b2013-05-04 22:12:25 -0500643 cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400644 cifs_reconnect(server);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400645 }
646
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400647 return false;
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400648}
649
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400650void
651dequeue_mid(struct mid_q_entry *mid, bool malformed)
Jeff Laytonea1f4502011-10-19 15:29:05 -0400652{
653#ifdef CONFIG_CIFS_STATS2
654 mid->when_received = jiffies;
655#endif
656 spin_lock(&GlobalMid_Lock);
657 if (!malformed)
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400658 mid->mid_state = MID_RESPONSE_RECEIVED;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400659 else
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400660 mid->mid_state = MID_RESPONSE_MALFORMED;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400661 list_del_init(&mid->qhead);
662 spin_unlock(&GlobalMid_Lock);
663}
664
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400665static void
666handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400667 char *buf, int malformed)
Jeff Laytonea1f4502011-10-19 15:29:05 -0400668{
Pavel Shilovsky316cf942012-05-23 14:31:03 +0400669 if (server->ops->check_trans2 &&
670 server->ops->check_trans2(mid, server, buf, malformed))
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400671 return;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400672 mid->resp_buf = buf;
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400673 mid->large_buf = server->large_buf;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400674 /* Was previous buf put in mpx struct for multi-rsp? */
675 if (!mid->multiRsp) {
676 /* smb buffer will be freed by user thread */
677 if (server->large_buf)
678 server->bigbuf = NULL;
679 else
680 server->smallbuf = NULL;
681 }
Jeff Laytonffc00e22011-10-19 15:29:13 -0400682 dequeue_mid(mid, malformed);
Pavel Shilovskyad69bae2011-08-01 13:19:43 +0400683}
684
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400685static void clean_demultiplex_info(struct TCP_Server_Info *server)
686{
687 int length;
688
689 /* take it off the list, if it's not already */
690 spin_lock(&cifs_tcp_ses_lock);
691 list_del_init(&server->tcp_ses_list);
692 spin_unlock(&cifs_tcp_ses_lock);
693
694 spin_lock(&GlobalMid_Lock);
695 server->tcpStatus = CifsExiting;
696 spin_unlock(&GlobalMid_Lock);
697 wake_up_all(&server->response_q);
698
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400699 /* check if we have blocked requests that need to free */
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300700 spin_lock(&server->req_lock);
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400701 if (server->credits <= 0)
702 server->credits = 1;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300703 spin_unlock(&server->req_lock);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400704 /*
705 * Although there should not be any requests blocked on this queue it
706 * can not hurt to be paranoid and try to wake up requests that may
707 * haven been blocked when more than 50 at time were on the wire to the
708 * same server - they now will see the session is in exit state and get
709 * out of SendReceive.
710 */
711 wake_up_all(&server->request_q);
712 /* give those requests time to exit */
713 msleep(125);
714
715 if (server->ssocket) {
716 sock_release(server->ssocket);
717 server->ssocket = NULL;
718 }
719
720 if (!list_empty(&server->pending_mid_q)) {
721 struct list_head dispose_list;
722 struct mid_q_entry *mid_entry;
723 struct list_head *tmp, *tmp2;
724
725 INIT_LIST_HEAD(&dispose_list);
726 spin_lock(&GlobalMid_Lock);
727 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
728 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Joe Perchesf96637b2013-05-04 22:12:25 -0500729 cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid);
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400730 mid_entry->mid_state = MID_SHUTDOWN;
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400731 list_move(&mid_entry->qhead, &dispose_list);
732 }
733 spin_unlock(&GlobalMid_Lock);
734
735 /* now walk dispose list and issue callbacks */
736 list_for_each_safe(tmp, tmp2, &dispose_list) {
737 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Joe Perchesf96637b2013-05-04 22:12:25 -0500738 cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400739 list_del_init(&mid_entry->qhead);
740 mid_entry->callback(mid_entry);
741 }
742 /* 1/8th of sec is more than enough time for them to exit */
743 msleep(125);
744 }
745
746 if (!list_empty(&server->pending_mid_q)) {
747 /*
748 * mpx threads have not exited yet give them at least the smb
749 * send timeout time for long ops.
750 *
751 * Due to delays on oplock break requests, we need to wait at
752 * least 45 seconds before giving up on a request getting a
753 * response and going ahead and killing cifsd.
754 */
Joe Perchesf96637b2013-05-04 22:12:25 -0500755 cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400756 msleep(46000);
757 /*
758 * If threads still have not exited they are probably never
759 * coming home not much else we can do but free the memory.
760 */
761 }
762
763 kfree(server->hostname);
Jeff Layton1041e3f2011-10-19 15:28:27 -0400764 kfree(server->iov);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400765 kfree(server);
766
767 length = atomic_dec_return(&tcpSesAllocCount);
768 if (length > 0)
769 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
770 GFP_KERNEL);
771}
772
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400773static int
Jeff Laytone9097ab2011-10-19 15:29:40 -0400774standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
775{
776 int length;
777 char *buf = server->smallbuf;
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400778 unsigned int pdu_length = get_rfc1002_length(buf);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400779
780 /* make sure this will fit in a large buffer */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400781 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500782 cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400783 cifs_reconnect(server);
784 wake_up(&server->response_q);
785 return -EAGAIN;
786 }
787
788 /* switch to large buffer if too big for a small one */
789 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
790 server->large_buf = true;
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400791 memcpy(server->bigbuf, buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400792 buf = server->bigbuf;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400793 }
794
795 /* now read the rest */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400796 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
797 pdu_length - HEADER_SIZE(server) + 1 + 4);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400798 if (length < 0)
799 return length;
800 server->total_read += length;
801
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400802 dump_smb(buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400803
804 /*
805 * We know that we received enough to get to the MID as we
806 * checked the pdu_length earlier. Now check to see
807 * if the rest of the header is OK. We borrow the length
808 * var for the rest of the loop to avoid a new stack var.
809 *
810 * 48 bytes is enough to display the header and a little bit
811 * into the payload for debugging purposes.
812 */
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400813 length = server->ops->check_message(buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400814 if (length != 0)
815 cifs_dump_mem("Bad SMB: ", buf,
816 min_t(unsigned int, server->total_read, 48));
817
Pavel Shilovsky2e44b282012-09-18 16:20:33 -0700818 if (server->ops->is_status_pending &&
819 server->ops->is_status_pending(buf, server, length))
820 return -1;
821
Jeff Laytonff4fa4a2012-02-07 06:31:05 -0500822 if (!mid)
823 return length;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400824
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400825 handle_mid(mid, server, buf, length);
Jeff Laytonff4fa4a2012-02-07 06:31:05 -0500826 return 0;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400827}
828
829static int
Al Viro7c97c202011-06-21 08:51:28 -0400830cifs_demultiplex_thread(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831{
832 int length;
Al Viro7c97c202011-06-21 08:51:28 -0400833 struct TCP_Server_Info *server = p;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400834 unsigned int pdu_length;
835 char *buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 struct task_struct *task_to_wake = NULL;
837 struct mid_q_entry *mid_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 current->flags |= PF_MEMALLOC;
Joe Perchesf96637b2013-05-04 22:12:25 -0500840 cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
Jeff Layton93d0ec82008-08-02 08:00:48 -0400841
842 length = atomic_inc_return(&tcpSesAllocCount);
843 if (length > 1)
Steve French26f57362007-08-30 22:09:15 +0000844 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
845 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700847 set_freezable();
Jeff Layton469ee612008-10-16 18:46:39 +0000848 while (server->tcpStatus != CifsExiting) {
Steve Frenchede13272005-08-30 20:10:14 -0700849 if (try_to_freeze())
850 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700851
Jeff Layton2a37ef92011-10-19 15:29:23 -0400852 if (!allocate_buffers(server))
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400853 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700854
Jeff Layton2a37ef92011-10-19 15:29:23 -0400855 server->large_buf = false;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400856 buf = server->smallbuf;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000857 pdu_length = 4; /* enough to get RFC1001 header */
Steve Frenchfda35942011-01-20 18:06:34 +0000858
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400859 length = cifs_read_from_socket(server, buf, pdu_length);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400860 if (length < 0)
Steve Frenchfda35942011-01-20 18:06:34 +0000861 continue;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400862 server->total_read = length;
Steve French67010fb2005-04-28 22:41:09 -0700863
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400864 /*
865 * The right amount was read from socket - 4 bytes,
866 * so we can now interpret the length field.
867 */
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400868 pdu_length = get_rfc1002_length(buf);
Steve French46810cb2005-04-28 22:41:09 -0700869
Joe Perchesf96637b2013-05-04 22:12:25 -0500870 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400871 if (!is_smb_response(server, buf[0]))
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000872 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700873
Jeff Layton89482a52011-10-19 15:28:57 -0400874 /* make sure we have enough to get to the MID */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400875 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500876 cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
877 pdu_length);
Jeff Layton89482a52011-10-19 15:28:57 -0400878 cifs_reconnect(server);
879 wake_up(&server->response_q);
880 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700881 }
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400882
Jeff Layton89482a52011-10-19 15:28:57 -0400883 /* read down to the MID */
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400884 length = cifs_read_from_socket(server, buf + 4,
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400885 HEADER_SIZE(server) - 1 - 4);
Jeff Layton89482a52011-10-19 15:28:57 -0400886 if (length < 0)
887 continue;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400888 server->total_read += length;
Jeff Layton89482a52011-10-19 15:28:57 -0400889
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400890 mid_entry = server->ops->find_mid(server, buf);
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400891
Jeff Layton44d22d82011-10-19 15:29:49 -0400892 if (!mid_entry || !mid_entry->receive)
893 length = standard_receive3(server, mid_entry);
894 else
895 length = mid_entry->receive(server, mid_entry);
896
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400897 if (length < 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700898 continue;
899
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400900 if (server->large_buf)
Jeff Laytone9097ab2011-10-19 15:29:40 -0400901 buf = server->bigbuf;
Steve Frenche4eb2952005-04-28 22:41:09 -0700902
Steve Frenchfda35942011-01-20 18:06:34 +0000903 server->lstrp = jiffies;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500904 if (mid_entry != NULL) {
Jeff Layton2a37ef92011-10-19 15:29:23 -0400905 if (!mid_entry->multiRsp || mid_entry->multiEnd)
906 mid_entry->callback(mid_entry);
Pavel Shilovsky7f0adb52012-05-28 15:50:10 +0400907 } else if (!server->ops->is_oplock_break ||
908 !server->ops->is_oplock_break(buf, server)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500909 cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
910 atomic_read(&midCount));
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400911 cifs_dump_mem("Received Data is: ", buf,
912 HEADER_SIZE(server));
Steve French39798772006-05-31 22:40:51 +0000913#ifdef CONFIG_CIFS_DEBUG2
Pavel Shilovsky7f0adb52012-05-28 15:50:10 +0400914 if (server->ops->dump_detail)
915 server->ops->dump_detail(buf);
Steve French39798772006-05-31 22:40:51 +0000916 cifs_dump_mids(server);
917#endif /* CIFS_DEBUG2 */
Steve French50c2f752007-07-13 00:33:32 +0000918
Steve Frenche4eb2952005-04-28 22:41:09 -0700919 }
920 } /* end while !EXITING */
921
Justin P. Mattockfd62cb72011-02-24 22:15:02 -0800922 /* buffer usually freed in free_mid - need to free it here on exit */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400923 cifs_buf_release(server->bigbuf);
924 if (server->smallbuf) /* no sense logging a debug message if NULL */
925 cifs_small_buf_release(server->smallbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400927 task_to_wake = xchg(&server->tsk, NULL);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400928 clean_demultiplex_info(server);
Steve French50c2f752007-07-13 00:33:32 +0000929
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400930 /* if server->tsk was NULL then wait for a signal before exiting */
931 if (!task_to_wake) {
932 set_current_state(TASK_INTERRUPTIBLE);
933 while (!signal_pending(current)) {
934 schedule();
935 set_current_state(TASK_INTERRUPTIBLE);
936 }
937 set_current_state(TASK_RUNNING);
938 }
939
Jeff Layton0468a2c2008-12-01 07:09:35 -0500940 module_put_and_exit(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941}
942
Jeff Laytonc359cf32007-11-16 22:22:06 +0000943/* extract the host portion of the UNC string */
944static char *
945extract_hostname(const char *unc)
946{
947 const char *src;
948 char *dst, *delim;
949 unsigned int len;
950
951 /* skip double chars at beginning of string */
952 /* BB: check validity of these bytes? */
953 src = unc + 2;
954
955 /* delimiter between hostname and sharename is always '\\' now */
956 delim = strchr(src, '\\');
957 if (!delim)
958 return ERR_PTR(-EINVAL);
959
960 len = delim - src;
961 dst = kmalloc((len + 1), GFP_KERNEL);
962 if (dst == NULL)
963 return ERR_PTR(-ENOMEM);
964
965 memcpy(dst, src, len);
966 dst[len] = '\0';
967
968 return dst;
969}
970
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400971static int get_option_ul(substring_t args[], unsigned long *option)
972{
973 int rc;
974 char *string;
975
976 string = match_strdup(args);
977 if (string == NULL)
978 return -ENOMEM;
Sachin Prabhubfa890a2012-04-13 14:04:32 +0100979 rc = kstrtoul(string, 0, option);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400980 kfree(string);
981
982 return rc;
983}
984
Eric W. Biederman3da46562013-02-06 01:37:39 -0800985static int get_option_uid(substring_t args[], kuid_t *result)
986{
987 unsigned long value;
988 kuid_t uid;
989 int rc;
990
991 rc = get_option_ul(args, &value);
992 if (rc)
993 return rc;
994
995 uid = make_kuid(current_user_ns(), value);
996 if (!uid_valid(uid))
997 return -EINVAL;
998
999 *result = uid;
1000 return 0;
1001}
1002
1003static int get_option_gid(substring_t args[], kgid_t *result)
1004{
1005 unsigned long value;
1006 kgid_t gid;
1007 int rc;
1008
1009 rc = get_option_ul(args, &value);
1010 if (rc)
1011 return rc;
1012
1013 gid = make_kgid(current_user_ns(), value);
1014 if (!gid_valid(gid))
1015 return -EINVAL;
1016
1017 *result = gid;
1018 return 0;
1019}
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001020
1021static int cifs_parse_security_flavors(char *value,
1022 struct smb_vol *vol)
1023{
1024
1025 substring_t args[MAX_OPT_ARGS];
1026
1027 switch (match_token(value, cifs_secflavor_tokens, args)) {
1028 case Opt_sec_krb5:
Martijn de Gouw0b7bc842012-10-24 11:45:46 +02001029 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_SIGN;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001030 break;
1031 case Opt_sec_krb5i:
1032 vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN;
1033 break;
1034 case Opt_sec_krb5p:
1035 /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */
Joe Perchesf96637b2013-05-04 22:12:25 -05001036 cifs_dbg(VFS, "Krb5 cifs privacy not supported\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001037 break;
1038 case Opt_sec_ntlmssp:
1039 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
1040 break;
1041 case Opt_sec_ntlmsspi:
1042 vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN;
1043 break;
1044 case Opt_ntlm:
1045 /* ntlm is default so can be turned off too */
1046 vol->secFlg |= CIFSSEC_MAY_NTLM;
1047 break;
1048 case Opt_sec_ntlmi:
1049 vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN;
1050 break;
Jeff Layton76596242012-07-23 20:34:17 -04001051 case Opt_sec_ntlmv2:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001052 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1053 break;
1054 case Opt_sec_ntlmv2i:
1055 vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN;
1056 break;
1057#ifdef CONFIG_CIFS_WEAK_PW_HASH
1058 case Opt_sec_lanman:
1059 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1060 break;
1061#endif
1062 case Opt_sec_none:
1063 vol->nullauth = 1;
1064 break;
1065 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001066 cifs_dbg(VFS, "bad security option: %s\n", value);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001067 return 1;
1068 }
1069
1070 return 0;
1071}
1072
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073static int
Jeff Layton15b6a472012-05-16 07:50:15 -04001074cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1075{
1076 substring_t args[MAX_OPT_ARGS];
1077
1078 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1079 case Opt_cache_loose:
1080 vol->direct_io = false;
1081 vol->strict_io = false;
1082 break;
1083 case Opt_cache_strict:
1084 vol->direct_io = false;
1085 vol->strict_io = true;
1086 break;
1087 case Opt_cache_none:
1088 vol->direct_io = true;
1089 vol->strict_io = false;
1090 break;
1091 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001092 cifs_dbg(VFS, "bad cache= option: %s\n", value);
Jeff Layton15b6a472012-05-16 07:50:15 -04001093 return 1;
1094 }
1095 return 0;
1096}
1097
1098static int
Jeff Layton23db65f2012-05-15 12:20:51 -04001099cifs_parse_smb_version(char *value, struct smb_vol *vol)
1100{
1101 substring_t args[MAX_OPT_ARGS];
1102
1103 switch (match_token(value, cifs_smb_version_tokens, args)) {
1104 case Smb_1:
1105 vol->ops = &smb1_operations;
1106 vol->vals = &smb1_values;
1107 break;
Steve French1080ef72011-02-24 18:07:19 +00001108#ifdef CONFIG_CIFS_SMB2
Steve Frenchdd446b12012-11-28 23:21:06 -06001109 case Smb_20:
1110 vol->ops = &smb21_operations; /* currently identical with 2.1 */
1111 vol->vals = &smb20_values;
1112 break;
Steve French1080ef72011-02-24 18:07:19 +00001113 case Smb_21:
1114 vol->ops = &smb21_operations;
1115 vol->vals = &smb21_values;
1116 break;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001117 case Smb_30:
Steve French38107d42012-12-08 22:08:06 -06001118 vol->ops = &smb30_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001119 vol->vals = &smb30_values;
1120 break;
Steve French1080ef72011-02-24 18:07:19 +00001121#endif
Jeff Layton23db65f2012-05-15 12:20:51 -04001122 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001123 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
Jeff Layton23db65f2012-05-15 12:20:51 -04001124 return 1;
1125 }
1126 return 0;
1127}
1128
Jeff Laytond387a5c2012-12-10 06:10:46 -05001129/*
1130 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1131 * fields with the result. Returns 0 on success and an error otherwise.
1132 */
1133static int
1134cifs_parse_devname(const char *devname, struct smb_vol *vol)
1135{
1136 char *pos;
1137 const char *delims = "/\\";
1138 size_t len;
1139
1140 /* make sure we have a valid UNC double delimiter prefix */
1141 len = strspn(devname, delims);
1142 if (len != 2)
1143 return -EINVAL;
1144
1145 /* find delimiter between host and sharename */
1146 pos = strpbrk(devname + 2, delims);
1147 if (!pos)
1148 return -EINVAL;
1149
1150 /* skip past delimiter */
1151 ++pos;
1152
1153 /* now go until next delimiter or end of string */
1154 len = strcspn(pos, delims);
1155
1156 /* move "pos" up to delimiter or NULL */
1157 pos += len;
1158 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1159 if (!vol->UNC)
1160 return -ENOMEM;
1161
1162 convert_delimiter(vol->UNC, '\\');
1163
1164 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1165 if (!*pos++ || !*pos)
1166 return 0;
1167
1168 vol->prepath = kstrdup(pos, GFP_KERNEL);
1169 if (!vol->prepath)
1170 return -ENOMEM;
1171
1172 return 0;
1173}
1174
Jeff Layton23db65f2012-05-15 12:20:51 -04001175static int
Sean Finneyb9468452011-04-11 13:19:32 +00001176cifs_parse_mount_options(const char *mountdata, const char *devname,
Steve French50c2f752007-07-13 00:33:32 +00001177 struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001178{
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001179 char *data, *end;
Vasily Averin957df452011-06-06 11:33:12 +04001180 char *mountdata_copy = NULL, *options;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 unsigned int temp_len, i, j;
1182 char separator[2];
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001183 short int override_uid = -1;
1184 short int override_gid = -1;
1185 bool uid_specified = false;
1186 bool gid_specified = false;
Jeff Laytond8162552012-03-23 14:40:56 -04001187 bool sloppy = false;
1188 char *invalid = NULL;
Jeff Layton88463992010-11-22 15:31:03 -05001189 char *nodename = utsname()->nodename;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001190 char *string = NULL;
1191 char *tmp_end, *value;
1192 char delim;
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001193 bool got_ip = false;
1194 unsigned short port = 0;
1195 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196
1197 separator[0] = ',';
Steve French50c2f752007-07-13 00:33:32 +00001198 separator[1] = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001199 delim = separator[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
Jeff Layton6ee95422012-11-26 11:09:57 -05001201 /* ensure we always start with zeroed-out smb_vol */
1202 memset(vol, 0, sizeof(*vol));
1203
Jeff Layton88463992010-11-22 15:31:03 -05001204 /*
1205 * does not have to be perfect mapping since field is
1206 * informational, only used for servers that do not support
1207 * port 445 and it can be overridden at mount time
1208 */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001209 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1210 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
Jeff Layton88463992010-11-22 15:31:03 -05001211 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1212
Jeff Layton1397f2e2011-01-07 11:30:28 -05001213 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
Steve Frencha10faeb22005-08-22 21:38:31 -07001214 /* null target name indicates to use *SMBSERVR default called name
1215 if we end up sending RFC1001 session initialize */
1216 vol->target_rfc1001_name[0] = 0;
Jeff Layton3e4b3e12010-07-19 18:00:17 -04001217 vol->cred_uid = current_uid();
1218 vol->linux_uid = current_uid();
David Howellsa001e5b2008-11-14 10:38:47 +11001219 vol->linux_gid = current_gid();
Jeff Laytonf55ed1a2009-05-26 16:28:11 -04001220
1221 /* default to only allowing write access to owner of the mount */
1222 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223
1224 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
Jeremy Allisonac670552005-06-22 17:26:35 -07001225 /* default is always to request posix paths. */
1226 vol->posix_paths = 1;
Jeff Laytona0c92172009-05-27 15:40:47 -04001227 /* default to using server inode numbers where available */
1228 vol->server_ino = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -07001229
Jeff Layton1b359202012-09-19 15:20:27 -07001230 /* default is to use strict cifs caching semantics */
1231 vol->strict_io = true;
1232
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05301233 vol->actimeo = CIFS_DEF_ACTIMEO;
1234
Jeff Layton23db65f2012-05-15 12:20:51 -04001235 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1236 vol->ops = &smb1_operations;
1237 vol->vals = &smb1_values;
1238
Sean Finneyb9468452011-04-11 13:19:32 +00001239 if (!mountdata)
1240 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
Sean Finneyb9468452011-04-11 13:19:32 +00001242 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1243 if (!mountdata_copy)
1244 goto cifs_parse_mount_err;
1245
1246 options = mountdata_copy;
Pavel Shilovsky4906e502011-04-14 22:00:56 +04001247 end = options + strlen(options);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001248
Steve French50c2f752007-07-13 00:33:32 +00001249 if (strncmp(options, "sep=", 4) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001250 if (options[4] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 separator[0] = options[4];
1252 options += 5;
1253 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -05001254 cifs_dbg(FYI, "Null separator not allowed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 }
1256 }
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001257 vol->backupuid_specified = false; /* no backup intent for a user */
1258 vol->backupgid_specified = false; /* no backup intent for a group */
Steve French50c2f752007-07-13 00:33:32 +00001259
Jeff Laytond387a5c2012-12-10 06:10:46 -05001260 /*
1261 * For now, we ignore -EINVAL errors under the assumption that the
1262 * unc= and prefixpath= options will be usable.
1263 */
1264 if (cifs_parse_devname(devname, vol) == -ENOMEM) {
1265 printk(KERN_ERR "CIFS: Unable to allocate memory to parse "
1266 "device string.\n");
1267 goto out_nomem;
1268 }
1269
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 while ((data = strsep(&options, separator)) != NULL) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001271 substring_t args[MAX_OPT_ARGS];
1272 unsigned long option;
1273 int token;
1274
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 if (!*data)
1276 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001278 token = match_token(data, cifs_mount_option_tokens, args);
1279
1280 switch (token) {
1281
1282 /* Ingnore the following */
1283 case Opt_ignore:
1284 break;
1285
1286 /* Boolean values */
1287 case Opt_user_xattr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 vol->no_xattr = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001289 break;
1290 case Opt_nouser_xattr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 vol->no_xattr = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001292 break;
1293 case Opt_forceuid:
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001294 override_uid = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001295 break;
1296 case Opt_noforceuid:
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001297 override_uid = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001298 break;
Jeff Layton72bd4812012-10-03 16:02:36 -04001299 case Opt_forcegid:
1300 override_gid = 1;
1301 break;
1302 case Opt_noforcegid:
1303 override_gid = 0;
1304 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001305 case Opt_noblocksend:
Steve Frenchedf1ae42008-10-29 00:47:57 +00001306 vol->noblocksnd = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001307 break;
1308 case Opt_noautotune:
Steve Frenchedf1ae42008-10-29 00:47:57 +00001309 vol->noautotune = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001310 break;
1311 case Opt_hard:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 vol->retry = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001313 break;
1314 case Opt_soft:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 vol->retry = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001316 break;
1317 case Opt_perm:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 vol->noperm = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001319 break;
1320 case Opt_noperm:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 vol->noperm = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001322 break;
1323 case Opt_mapchars:
Steve French6a0b4822005-04-28 22:41:05 -07001324 vol->remap = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001325 break;
1326 case Opt_nomapchars:
Steve French6a0b4822005-04-28 22:41:05 -07001327 vol->remap = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001328 break;
1329 case Opt_sfu:
Steve French50c2f752007-07-13 00:33:32 +00001330 vol->sfu_emul = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001331 break;
1332 case Opt_nosfu:
Steve French50c2f752007-07-13 00:33:32 +00001333 vol->sfu_emul = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001334 break;
1335 case Opt_nodfs:
Steve French2c1b8612008-10-16 18:35:21 +00001336 vol->nodfs = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001337 break;
1338 case Opt_posixpaths:
Jeremy Allisonac670552005-06-22 17:26:35 -07001339 vol->posix_paths = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001340 break;
1341 case Opt_noposixpaths:
Jeremy Allisonac670552005-06-22 17:26:35 -07001342 vol->posix_paths = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001343 break;
1344 case Opt_nounix:
Steve Frenchc18c8422007-07-18 23:21:09 +00001345 vol->no_linux_ext = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001346 break;
1347 case Opt_nocase:
Steve French50c2f752007-07-13 00:33:32 +00001348 vol->nocase = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001349 break;
1350 case Opt_brl:
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001351 vol->nobrl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001352 break;
1353 case Opt_nobrl:
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001354 vol->nobrl = 1;
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +04001355 /*
1356 * turn off mandatory locking in mode
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001357 * if remote locking is turned off since the
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +04001358 * local vfs will do advisory
1359 */
Steve French50c2f752007-07-13 00:33:32 +00001360 if (vol->file_mode ==
1361 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
Steve Frenchd3485d32005-08-19 11:04:29 -07001362 vol->file_mode = S_IALLUGO;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001363 break;
1364 case Opt_forcemandatorylock:
Steve French13a6e422008-12-02 17:24:33 +00001365 vol->mand_lock = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001366 break;
1367 case Opt_setuids:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 vol->setuids = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001369 break;
1370 case Opt_nosetuids:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 vol->setuids = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001372 break;
1373 case Opt_dynperm:
Jeff Laytond0a9c072008-05-12 22:23:49 +00001374 vol->dynperm = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001375 break;
1376 case Opt_nodynperm:
Jeff Laytond0a9c072008-05-12 22:23:49 +00001377 vol->dynperm = false;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001378 break;
1379 case Opt_nohard:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 vol->retry = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001381 break;
1382 case Opt_nosoft:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 vol->retry = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001384 break;
1385 case Opt_nointr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 vol->intr = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001387 break;
1388 case Opt_intr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 vol->intr = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001390 break;
1391 case Opt_nostrictsync:
Steve Frenchbe652442009-02-23 15:21:59 +00001392 vol->nostrictsync = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001393 break;
1394 case Opt_strictsync:
Steve Frenchbe652442009-02-23 15:21:59 +00001395 vol->nostrictsync = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001396 break;
1397 case Opt_serverino:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398 vol->server_ino = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001399 break;
1400 case Opt_noserverino:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 vol->server_ino = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001402 break;
1403 case Opt_rwpidforward:
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00001404 vol->rwpidforward = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001405 break;
1406 case Opt_cifsacl:
Steve French0a4b92c2006-01-12 15:44:21 -08001407 vol->cifs_acl = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001408 break;
1409 case Opt_nocifsacl:
Steve French0a4b92c2006-01-12 15:44:21 -08001410 vol->cifs_acl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001411 break;
1412 case Opt_acl:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 vol->no_psx_acl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001414 break;
1415 case Opt_noacl:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 vol->no_psx_acl = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001417 break;
1418 case Opt_locallease:
Steve French84210e92008-10-23 04:42:37 +00001419 vol->local_lease = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001420 break;
1421 case Opt_sign:
Steve French750d1152006-06-27 06:28:30 +00001422 vol->secFlg |= CIFSSEC_MUST_SIGN;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001423 break;
1424 case Opt_seal:
Steve French95b1cb92008-05-15 16:44:38 +00001425 /* we do not do the following in secFlags because seal
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001426 * is a per tree connection (mount) not a per socket
1427 * or per-smb connection option in the protocol
1428 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1429 */
Steve French95b1cb92008-05-15 16:44:38 +00001430 vol->seal = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001431 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001432 case Opt_noac:
Steve French50c2f752007-07-13 00:33:32 +00001433 printk(KERN_WARNING "CIFS: Mount option noac not "
1434 "supported. Instead set "
1435 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001436 break;
1437 case Opt_fsc:
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301438#ifndef CONFIG_CIFS_FSCACHE
Joe Perchesf96637b2013-05-04 22:12:25 -05001439 cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001440 goto cifs_parse_mount_err;
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301441#endif
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05301442 vol->fsc = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001443 break;
1444 case Opt_mfsymlinks:
Stefan Metzmacher736a3322010-07-30 14:56:00 +02001445 vol->mfsymlinks = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001446 break;
1447 case Opt_multiuser:
Jeff Layton0eb8a132010-10-06 19:51:12 -04001448 vol->multiuser = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001449 break;
Jeff Laytond8162552012-03-23 14:40:56 -04001450 case Opt_sloppy:
1451 sloppy = true;
1452 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001453
1454 /* Numeric Values */
1455 case Opt_backupuid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001456 if (get_option_uid(args, &vol->backupuid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001457 cifs_dbg(VFS, "%s: Invalid backupuid value\n",
1458 __func__);
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001459 goto cifs_parse_mount_err;
1460 }
1461 vol->backupuid_specified = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001462 break;
1463 case Opt_backupgid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001464 if (get_option_gid(args, &vol->backupgid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001465 cifs_dbg(VFS, "%s: Invalid backupgid value\n",
1466 __func__);
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001467 goto cifs_parse_mount_err;
1468 }
1469 vol->backupgid_specified = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001470 break;
1471 case Opt_uid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001472 if (get_option_uid(args, &vol->linux_uid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001473 cifs_dbg(VFS, "%s: Invalid uid value\n",
1474 __func__);
Sean Finneyb9468452011-04-11 13:19:32 +00001475 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001477 uid_specified = true;
1478 break;
1479 case Opt_cruid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001480 if (get_option_uid(args, &vol->cred_uid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001481 cifs_dbg(VFS, "%s: Invalid cruid value\n",
1482 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001483 goto cifs_parse_mount_err;
1484 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001485 break;
1486 case Opt_gid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001487 if (get_option_gid(args, &vol->linux_gid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001488 cifs_dbg(VFS, "%s: Invalid gid value\n",
1489 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001490 goto cifs_parse_mount_err;
1491 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001492 gid_specified = true;
1493 break;
1494 case Opt_file_mode:
1495 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001496 cifs_dbg(VFS, "%s: Invalid file_mode value\n",
1497 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001498 goto cifs_parse_mount_err;
1499 }
1500 vol->file_mode = option;
1501 break;
1502 case Opt_dirmode:
1503 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001504 cifs_dbg(VFS, "%s: Invalid dir_mode value\n",
1505 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001506 goto cifs_parse_mount_err;
1507 }
1508 vol->dir_mode = option;
1509 break;
1510 case Opt_port:
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001511 if (get_option_ul(args, &option) ||
1512 option > USHRT_MAX) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001513 cifs_dbg(VFS, "%s: Invalid port value\n",
1514 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001515 goto cifs_parse_mount_err;
1516 }
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001517 port = (unsigned short)option;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001518 break;
1519 case Opt_rsize:
1520 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001521 cifs_dbg(VFS, "%s: Invalid rsize value\n",
1522 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001523 goto cifs_parse_mount_err;
1524 }
1525 vol->rsize = option;
1526 break;
1527 case Opt_wsize:
1528 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001529 cifs_dbg(VFS, "%s: Invalid wsize value\n",
1530 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001531 goto cifs_parse_mount_err;
1532 }
1533 vol->wsize = option;
1534 break;
1535 case Opt_actimeo:
1536 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001537 cifs_dbg(VFS, "%s: Invalid actimeo value\n",
1538 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001539 goto cifs_parse_mount_err;
1540 }
1541 vol->actimeo = HZ * option;
1542 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001543 cifs_dbg(VFS, "attribute cache timeout too large\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001544 goto cifs_parse_mount_err;
1545 }
1546 break;
1547
1548 /* String Arguments */
1549
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001550 case Opt_blank_user:
1551 /* null user, ie. anonymous authentication */
1552 vol->nullauth = 1;
1553 vol->username = NULL;
1554 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001555 case Opt_user:
1556 string = match_strdup(args);
1557 if (string == NULL)
1558 goto out_nomem;
1559
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001560 if (strnlen(string, MAX_USERNAME_SIZE) >
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001561 MAX_USERNAME_SIZE) {
1562 printk(KERN_WARNING "CIFS: username too long\n");
1563 goto cifs_parse_mount_err;
1564 }
1565 vol->username = kstrdup(string, GFP_KERNEL);
Joe Perchesf96637b2013-05-04 22:12:25 -05001566 if (!vol->username)
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001567 goto cifs_parse_mount_err;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001568 break;
1569 case Opt_blank_pass:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001570 /* passwords have to be handled differently
1571 * to allow the character used for deliminator
1572 * to be passed within them
1573 */
1574
Sachin Prabhuc369c9a2013-04-09 18:17:41 +01001575 /*
1576 * Check if this is a case where the password
1577 * starts with a delimiter
1578 */
1579 tmp_end = strchr(data, '=');
1580 tmp_end++;
1581 if (!(tmp_end < end && tmp_end[1] == delim)) {
1582 /* No it is not. Set the password to NULL */
1583 vol->password = NULL;
1584 break;
1585 }
1586 /* Yes it is. Drop down to Opt_pass below.*/
1587 case Opt_pass:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001588 /* Obtain the value string */
1589 value = strchr(data, '=');
Sachin Prabhu10238072012-03-28 18:07:08 +01001590 value++;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001591
1592 /* Set tmp_end to end of the string */
1593 tmp_end = (char *) value + strlen(value);
1594
1595 /* Check if following character is the deliminator
1596 * If yes, we have encountered a double deliminator
1597 * reset the NULL character to the deliminator
1598 */
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301599 if (tmp_end < end && tmp_end[1] == delim) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001600 tmp_end[0] = delim;
1601
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301602 /* Keep iterating until we get to a single
1603 * deliminator OR the end
1604 */
1605 while ((tmp_end = strchr(tmp_end, delim))
1606 != NULL && (tmp_end[1] == delim)) {
1607 tmp_end = (char *) &tmp_end[2];
1608 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001609
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301610 /* Reset var options to point to next element */
1611 if (tmp_end) {
1612 tmp_end[0] = '\0';
1613 options = (char *) &tmp_end[1];
1614 } else
1615 /* Reached the end of the mount option
1616 * string */
1617 options = end;
1618 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001619
1620 /* Now build new password string */
1621 temp_len = strlen(value);
1622 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1623 if (vol->password == NULL) {
1624 printk(KERN_WARNING "CIFS: no memory "
1625 "for password\n");
1626 goto cifs_parse_mount_err;
1627 }
1628
1629 for (i = 0, j = 0; i < temp_len; i++, j++) {
1630 vol->password[j] = value[i];
1631 if ((value[i] == delim) &&
1632 value[i+1] == delim)
1633 /* skip the second deliminator */
1634 i++;
1635 }
1636 vol->password[j] = '\0';
1637 break;
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001638 case Opt_blank_ip:
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001639 /* FIXME: should this be an error instead? */
1640 got_ip = false;
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001641 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001642 case Opt_ip:
1643 string = match_strdup(args);
1644 if (string == NULL)
1645 goto out_nomem;
1646
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001647 if (!cifs_convert_address(dstaddr, string,
1648 strlen(string))) {
1649 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1650 string);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001651 goto cifs_parse_mount_err;
1652 }
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001653 got_ip = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001654 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001655 case Opt_domain:
1656 string = match_strdup(args);
1657 if (string == NULL)
1658 goto out_nomem;
1659
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001660 if (strnlen(string, 256) == 256) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001661 printk(KERN_WARNING "CIFS: domain name too"
1662 " long\n");
1663 goto cifs_parse_mount_err;
1664 }
1665
1666 vol->domainname = kstrdup(string, GFP_KERNEL);
1667 if (!vol->domainname) {
1668 printk(KERN_WARNING "CIFS: no memory "
1669 "for domainname\n");
1670 goto cifs_parse_mount_err;
1671 }
Joe Perchesf96637b2013-05-04 22:12:25 -05001672 cifs_dbg(FYI, "Domain name set\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001673 break;
1674 case Opt_srcaddr:
1675 string = match_strdup(args);
1676 if (string == NULL)
1677 goto out_nomem;
1678
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001679 if (!cifs_convert_address(
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001680 (struct sockaddr *)&vol->srcaddr,
1681 string, strlen(string))) {
1682 printk(KERN_WARNING "CIFS: Could not parse"
1683 " srcaddr: %s\n", string);
1684 goto cifs_parse_mount_err;
1685 }
1686 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001687 case Opt_iocharset:
1688 string = match_strdup(args);
1689 if (string == NULL)
1690 goto out_nomem;
1691
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001692 if (strnlen(string, 1024) >= 65) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001693 printk(KERN_WARNING "CIFS: iocharset name "
1694 "too long.\n");
1695 goto cifs_parse_mount_err;
1696 }
1697
1698 if (strnicmp(string, "default", 7) != 0) {
1699 vol->iocharset = kstrdup(string,
1700 GFP_KERNEL);
1701 if (!vol->iocharset) {
1702 printk(KERN_WARNING "CIFS: no memory"
1703 "for charset\n");
1704 goto cifs_parse_mount_err;
1705 }
1706 }
1707 /* if iocharset not set then load_nls_default
1708 * is used by caller
1709 */
Joe Perchesf96637b2013-05-04 22:12:25 -05001710 cifs_dbg(FYI, "iocharset set to %s\n", string);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001711 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001712 case Opt_netbiosname:
1713 string = match_strdup(args);
1714 if (string == NULL)
1715 goto out_nomem;
1716
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001717 memset(vol->source_rfc1001_name, 0x20,
1718 RFC1001_NAME_LEN);
1719 /*
1720 * FIXME: are there cases in which a comma can
1721 * be valid in workstation netbios name (and
1722 * need special handling)?
1723 */
1724 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1725 /* don't ucase netbiosname for user */
1726 if (string[i] == 0)
1727 break;
1728 vol->source_rfc1001_name[i] = string[i];
1729 }
1730 /* The string has 16th byte zero still from
1731 * set at top of the function
1732 */
1733 if (i == RFC1001_NAME_LEN && string[i] != 0)
1734 printk(KERN_WARNING "CIFS: netbiosname"
1735 " longer than 15 truncated.\n");
1736
1737 break;
1738 case Opt_servern:
1739 /* servernetbiosname specified override *SMBSERVER */
1740 string = match_strdup(args);
1741 if (string == NULL)
1742 goto out_nomem;
1743
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001744 /* last byte, type, is 0x20 for servr type */
1745 memset(vol->target_rfc1001_name, 0x20,
1746 RFC1001_NAME_LEN_WITH_NULL);
1747
1748 /* BB are there cases in which a comma can be
1749 valid in this workstation netbios name
1750 (and need special handling)? */
1751
1752 /* user or mount helper must uppercase the
1753 netbios name */
1754 for (i = 0; i < 15; i++) {
1755 if (string[i] == 0)
1756 break;
1757 vol->target_rfc1001_name[i] = string[i];
1758 }
1759 /* The string has 16th byte zero still from
1760 set at top of the function */
1761 if (i == RFC1001_NAME_LEN && string[i] != 0)
1762 printk(KERN_WARNING "CIFS: server net"
1763 "biosname longer than 15 truncated.\n");
1764 break;
1765 case Opt_ver:
1766 string = match_strdup(args);
1767 if (string == NULL)
1768 goto out_nomem;
1769
Jeff Layton5249af32012-05-15 12:04:03 -04001770 if (strnicmp(string, "1", 1) == 0) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001771 /* This is the default */
1772 break;
1773 }
1774 /* For all other value, error */
1775 printk(KERN_WARNING "CIFS: Invalid version"
1776 " specified\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001777 goto cifs_parse_mount_err;
Jeff Layton23db65f2012-05-15 12:20:51 -04001778 case Opt_vers:
1779 string = match_strdup(args);
1780 if (string == NULL)
1781 goto out_nomem;
1782
1783 if (cifs_parse_smb_version(string, vol) != 0)
1784 goto cifs_parse_mount_err;
1785 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001786 case Opt_sec:
1787 string = match_strdup(args);
1788 if (string == NULL)
1789 goto out_nomem;
1790
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001791 if (cifs_parse_security_flavors(string, vol) != 0)
1792 goto cifs_parse_mount_err;
1793 break;
Jeff Layton15b6a472012-05-16 07:50:15 -04001794 case Opt_cache:
1795 string = match_strdup(args);
1796 if (string == NULL)
1797 goto out_nomem;
1798
1799 if (cifs_parse_cache_flavor(string, vol) != 0)
1800 goto cifs_parse_mount_err;
1801 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001802 default:
Jeff Laytond8162552012-03-23 14:40:56 -04001803 /*
1804 * An option we don't recognize. Save it off for later
1805 * if we haven't already found one
1806 */
1807 if (!invalid)
1808 invalid = data;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001809 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001811 /* Free up any allocated string */
1812 kfree(string);
1813 string = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001815
Jeff Laytond8162552012-03-23 14:40:56 -04001816 if (!sloppy && invalid) {
1817 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1818 goto cifs_parse_mount_err;
1819 }
1820
Jeff Layton8a8798a2012-01-17 16:09:15 -05001821#ifndef CONFIG_KEYS
1822 /* Muliuser mounts require CONFIG_KEYS support */
1823 if (vol->multiuser) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001824 cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001825 goto cifs_parse_mount_err;
Jeff Layton0eb8a132010-10-06 19:51:12 -04001826 }
Jeff Layton8a8798a2012-01-17 16:09:15 -05001827#endif
Jeff Laytone5e69ab2012-11-25 08:00:42 -05001828 if (!vol->UNC) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001829 cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string or in unc= option!\n");
Jeff Laytone5e69ab2012-11-25 08:00:42 -05001830 goto cifs_parse_mount_err;
1831 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001832
Jeff Layton62a1a432012-12-10 06:10:45 -05001833 /* make sure UNC has a share name */
1834 if (!strchr(vol->UNC + 3, '\\')) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001835 cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n");
Jeff Layton62a1a432012-12-10 06:10:45 -05001836 goto cifs_parse_mount_err;
1837 }
1838
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001839 if (!got_ip) {
1840 /* No ip= option specified? Try to get it from UNC */
1841 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1842 strlen(&vol->UNC[2]))) {
1843 printk(KERN_ERR "Unable to determine destination "
1844 "address.\n");
1845 goto cifs_parse_mount_err;
1846 }
1847 }
1848
1849 /* set the port that we got earlier */
1850 cifs_set_port(dstaddr, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001852 if (uid_specified)
1853 vol->override_uid = override_uid;
1854 else if (override_uid == 1)
1855 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1856 "specified with no uid= option.\n");
1857
1858 if (gid_specified)
1859 vol->override_gid = override_gid;
1860 else if (override_gid == 1)
1861 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1862 "specified with no gid= option.\n");
1863
Sean Finneyb9468452011-04-11 13:19:32 +00001864 kfree(mountdata_copy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865 return 0;
Sean Finneyb9468452011-04-11 13:19:32 +00001866
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001867out_nomem:
1868 printk(KERN_WARNING "Could not allocate temporary buffer\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001869cifs_parse_mount_err:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001870 kfree(string);
Sean Finneyb9468452011-04-11 13:19:32 +00001871 kfree(mountdata_copy);
1872 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873}
1874
Ben Greear3eb9a882010-09-01 17:06:02 -07001875/** Returns true if srcaddr isn't specified and rhs isn't
1876 * specified, or if srcaddr is specified and
1877 * matches the IP address of the rhs argument.
1878 */
Jeff Layton45151482010-07-06 20:43:02 -04001879static bool
Ben Greear3eb9a882010-09-01 17:06:02 -07001880srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1881{
1882 switch (srcaddr->sa_family) {
1883 case AF_UNSPEC:
1884 return (rhs->sa_family == AF_UNSPEC);
1885 case AF_INET: {
1886 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1887 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1888 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1889 }
1890 case AF_INET6: {
1891 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
Nickolai Zeldoviche3e27752013-01-16 21:36:17 -05001892 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
Ben Greear3eb9a882010-09-01 17:06:02 -07001893 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1894 }
1895 default:
1896 WARN_ON(1);
1897 return false; /* don't expect to be here */
1898 }
1899}
1900
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001901/*
1902 * If no port is specified in addr structure, we try to match with 445 port
1903 * and if it fails - with 139 ports. It should be called only if address
1904 * families of server and addr are equal.
1905 */
1906static bool
1907match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1908{
Steve French6da97912011-03-13 18:55:55 +00001909 __be16 port, *sport;
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001910
1911 switch (addr->sa_family) {
1912 case AF_INET:
1913 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1914 port = ((struct sockaddr_in *) addr)->sin_port;
1915 break;
1916 case AF_INET6:
1917 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1918 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1919 break;
1920 default:
1921 WARN_ON(1);
1922 return false;
1923 }
1924
1925 if (!port) {
1926 port = htons(CIFS_PORT);
1927 if (port == *sport)
1928 return true;
1929
1930 port = htons(RFC1001_PORT);
1931 }
1932
1933 return port == *sport;
1934}
Ben Greear3eb9a882010-09-01 17:06:02 -07001935
1936static bool
1937match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1938 struct sockaddr *srcaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939{
Jeff Layton45151482010-07-06 20:43:02 -04001940 switch (addr->sa_family) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001941 case AF_INET: {
1942 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1943 struct sockaddr_in *srv_addr4 =
1944 (struct sockaddr_in *)&server->dstaddr;
1945
1946 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
Jeff Layton45151482010-07-06 20:43:02 -04001947 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001948 break;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001949 }
1950 case AF_INET6: {
1951 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1952 struct sockaddr_in6 *srv_addr6 =
1953 (struct sockaddr_in6 *)&server->dstaddr;
1954
Jeff Layton45151482010-07-06 20:43:02 -04001955 if (!ipv6_addr_equal(&addr6->sin6_addr,
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001956 &srv_addr6->sin6_addr))
Jeff Layton45151482010-07-06 20:43:02 -04001957 return false;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001958 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
Jeff Layton45151482010-07-06 20:43:02 -04001959 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001960 break;
1961 }
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001962 default:
1963 WARN_ON(1);
1964 return false; /* don't expect to be here */
1965 }
Jeff Layton45151482010-07-06 20:43:02 -04001966
Ben Greear3eb9a882010-09-01 17:06:02 -07001967 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1968 return false;
1969
Jeff Layton45151482010-07-06 20:43:02 -04001970 return true;
1971}
1972
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001973static bool
1974match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1975{
1976 unsigned int secFlags;
1977
1978 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1979 secFlags = vol->secFlg;
1980 else
1981 secFlags = global_secflags | vol->secFlg;
1982
1983 switch (server->secType) {
1984 case LANMAN:
1985 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1986 return false;
1987 break;
1988 case NTLMv2:
1989 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1990 return false;
1991 break;
1992 case NTLM:
1993 if (!(secFlags & CIFSSEC_MAY_NTLM))
1994 return false;
1995 break;
1996 case Kerberos:
1997 if (!(secFlags & CIFSSEC_MAY_KRB5))
1998 return false;
1999 break;
2000 case RawNTLMSSP:
2001 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
2002 return false;
2003 break;
2004 default:
2005 /* shouldn't happen */
2006 return false;
2007 }
2008
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002009 /* now check if signing mode is acceptable */
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002010 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
Steve French96daf2b2011-05-27 04:34:02 +00002011 (server->sec_mode & SECMODE_SIGN_REQUIRED))
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002012 return false;
2013 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
Steve French96daf2b2011-05-27 04:34:02 +00002014 (server->sec_mode &
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002015 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
2016 return false;
2017
2018 return true;
2019}
2020
Jeff Layton9fa114f2012-11-26 11:09:57 -05002021static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002022{
Jeff Layton9fa114f2012-11-26 11:09:57 -05002023 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2024
Jeff Layton23db65f2012-05-15 12:20:51 -04002025 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2026 return 0;
2027
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002028 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2029 return 0;
2030
2031 if (!match_address(server, addr,
2032 (struct sockaddr *)&vol->srcaddr))
2033 return 0;
2034
2035 if (!match_port(server, addr))
2036 return 0;
2037
2038 if (!match_security(server, vol))
2039 return 0;
2040
2041 return 1;
2042}
2043
Jeff Layton45151482010-07-06 20:43:02 -04002044static struct TCP_Server_Info *
Jeff Layton9fa114f2012-11-26 11:09:57 -05002045cifs_find_tcp_session(struct smb_vol *vol)
Jeff Layton45151482010-07-06 20:43:02 -04002046{
Jeff Laytone7ddee92008-11-14 13:44:38 -05002047 struct TCP_Server_Info *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302049 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton45151482010-07-06 20:43:02 -04002050 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
Jeff Layton9fa114f2012-11-26 11:09:57 -05002051 if (!match_server(server, vol))
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002052 continue;
2053
Jeff Laytone7ddee92008-11-14 13:44:38 -05002054 ++server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302055 spin_unlock(&cifs_tcp_ses_lock);
Joe Perchesf96637b2013-05-04 22:12:25 -05002056 cifs_dbg(FYI, "Existing tcp session with server found\n");
Jeff Laytone7ddee92008-11-14 13:44:38 -05002057 return server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302059 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 return NULL;
2061}
2062
Jeff Layton14fbf502008-11-14 13:53:46 -05002063static void
Jeff Laytone7ddee92008-11-14 13:44:38 -05002064cifs_put_tcp_session(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065{
Jeff Laytone7ddee92008-11-14 13:44:38 -05002066 struct task_struct *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302068 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002069 if (--server->srv_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302070 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002071 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072 }
Steve Frenchdea570e02008-05-06 22:05:51 +00002073
Rob Landleyf1d0c992011-01-22 15:44:05 -06002074 put_net(cifs_net_ns(server));
2075
Jeff Laytone7ddee92008-11-14 13:44:38 -05002076 list_del_init(&server->tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302077 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002078
Jeff Laytonc74093b2011-01-11 07:24:23 -05002079 cancel_delayed_work_sync(&server->echo);
2080
Jeff Laytone7ddee92008-11-14 13:44:38 -05002081 spin_lock(&GlobalMid_Lock);
2082 server->tcpStatus = CifsExiting;
2083 spin_unlock(&GlobalMid_Lock);
2084
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002085 cifs_crypto_shash_release(server);
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05302086 cifs_fscache_release_client_cookie(server);
2087
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05002088 kfree(server->session_key.response);
2089 server->session_key.response = NULL;
2090 server->session_key.len = 0;
2091
Jeff Laytone7ddee92008-11-14 13:44:38 -05002092 task = xchg(&server->tsk, NULL);
2093 if (task)
2094 force_sig(SIGKILL, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095}
2096
Jeff Layton63c038c2008-12-01 18:41:46 -05002097static struct TCP_Server_Info *
2098cifs_get_tcp_session(struct smb_vol *volume_info)
2099{
2100 struct TCP_Server_Info *tcp_ses = NULL;
Jeff Layton63c038c2008-12-01 18:41:46 -05002101 int rc;
2102
Joe Perchesf96637b2013-05-04 22:12:25 -05002103 cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC);
Jeff Layton63c038c2008-12-01 18:41:46 -05002104
2105 /* see if we already have a matching tcp_ses */
Jeff Layton9fa114f2012-11-26 11:09:57 -05002106 tcp_ses = cifs_find_tcp_session(volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05002107 if (tcp_ses)
2108 return tcp_ses;
2109
2110 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2111 if (!tcp_ses) {
2112 rc = -ENOMEM;
2113 goto out_err;
2114 }
2115
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002116 rc = cifs_crypto_shash_allocate(tcp_ses);
2117 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002118 cifs_dbg(VFS, "could not setup hash structures rc %d\n", rc);
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002119 goto out_err;
2120 }
2121
Jeff Layton23db65f2012-05-15 12:20:51 -04002122 tcp_ses->ops = volume_info->ops;
2123 tcp_ses->vals = volume_info->vals;
Rob Landleyf1d0c992011-01-22 15:44:05 -06002124 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
Jeff Layton63c038c2008-12-01 18:41:46 -05002125 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2126 if (IS_ERR(tcp_ses->hostname)) {
2127 rc = PTR_ERR(tcp_ses->hostname);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002128 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002129 }
2130
2131 tcp_ses->noblocksnd = volume_info->noblocksnd;
2132 tcp_ses->noautotune = volume_info->noautotune;
Steve French6a5fa2362010-01-01 01:28:43 +00002133 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +03002134 tcp_ses->in_flight = 0;
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +04002135 tcp_ses->credits = 1;
Jeff Layton63c038c2008-12-01 18:41:46 -05002136 init_waitqueue_head(&tcp_ses->response_q);
2137 init_waitqueue_head(&tcp_ses->request_q);
2138 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2139 mutex_init(&tcp_ses->srv_mutex);
2140 memcpy(tcp_ses->workstation_RFC1001_name,
2141 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2142 memcpy(tcp_ses->server_RFC1001_name,
2143 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05002144 tcp_ses->session_estab = false;
Jeff Layton63c038c2008-12-01 18:41:46 -05002145 tcp_ses->sequence_number = 0;
Steve Frenchfda35942011-01-20 18:06:34 +00002146 tcp_ses->lstrp = jiffies;
Jeff Layton58fa0152012-05-01 17:41:16 -04002147 spin_lock_init(&tcp_ses->req_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002148 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2149 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
Jeff Laytonc74093b2011-01-11 07:24:23 -05002150 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
Jeff Layton9fa114f2012-11-26 11:09:57 -05002151 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2152 sizeof(tcp_ses->srcaddr));
2153 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2154 sizeof(tcp_ses->dstaddr));
Jeff Layton63c038c2008-12-01 18:41:46 -05002155 /*
2156 * at this point we are the only ones with the pointer
2157 * to the struct since the kernel thread not created yet
2158 * no need to spinlock this init of tcpStatus or srv_count
2159 */
2160 tcp_ses->tcpStatus = CifsNew;
2161 ++tcp_ses->srv_count;
2162
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002163 rc = ip_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05002164 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002165 cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002166 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002167 }
2168
2169 /*
2170 * since we're in a cifs function already, we know that
2171 * this will succeed. No need for try_module_get().
2172 */
2173 __module_get(THIS_MODULE);
Al Viro7c97c202011-06-21 08:51:28 -04002174 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
Jeff Layton63c038c2008-12-01 18:41:46 -05002175 tcp_ses, "cifsd");
2176 if (IS_ERR(tcp_ses->tsk)) {
2177 rc = PTR_ERR(tcp_ses->tsk);
Joe Perchesf96637b2013-05-04 22:12:25 -05002178 cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
Jeff Layton63c038c2008-12-01 18:41:46 -05002179 module_put(THIS_MODULE);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002180 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002181 }
Steve Frenchfd88ce92011-04-12 01:01:14 +00002182 tcp_ses->tcpStatus = CifsNeedNegotiate;
Jeff Layton63c038c2008-12-01 18:41:46 -05002183
2184 /* thread spawned, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302185 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002186 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302187 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002188
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05302189 cifs_fscache_get_client_cookie(tcp_ses);
2190
Jeff Laytonc74093b2011-01-11 07:24:23 -05002191 /* queue echo request delayed work */
Jeff Laytonda472fc2012-03-23 14:40:53 -04002192 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
Jeff Laytonc74093b2011-01-11 07:24:23 -05002193
Jeff Layton63c038c2008-12-01 18:41:46 -05002194 return tcp_ses;
2195
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002196out_err_crypto_release:
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002197 cifs_crypto_shash_release(tcp_ses);
2198
Rob Landleyf1d0c992011-01-22 15:44:05 -06002199 put_net(cifs_net_ns(tcp_ses));
2200
Jeff Layton63c038c2008-12-01 18:41:46 -05002201out_err:
2202 if (tcp_ses) {
Steve French8347a5c2009-10-06 18:31:29 +00002203 if (!IS_ERR(tcp_ses->hostname))
2204 kfree(tcp_ses->hostname);
Jeff Layton63c038c2008-12-01 18:41:46 -05002205 if (tcp_ses->ssocket)
2206 sock_release(tcp_ses->ssocket);
2207 kfree(tcp_ses);
2208 }
2209 return ERR_PTR(rc);
2210}
2211
Steve French96daf2b2011-05-27 04:34:02 +00002212static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002213{
2214 switch (ses->server->secType) {
2215 case Kerberos:
Eric W. Biederman64ed39d2013-02-06 02:30:39 -08002216 if (!uid_eq(vol->cred_uid, ses->cred_uid))
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002217 return 0;
2218 break;
2219 default:
Jeff Layton04febab2012-01-17 16:09:15 -05002220 /* NULL username means anonymous session */
2221 if (ses->user_name == NULL) {
2222 if (!vol->nullauth)
2223 return 0;
2224 break;
2225 }
2226
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002227 /* anything else takes username/password */
Jeff Layton04febab2012-01-17 16:09:15 -05002228 if (strncmp(ses->user_name,
2229 vol->username ? vol->username : "",
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002230 MAX_USERNAME_SIZE))
2231 return 0;
2232 if (strlen(vol->username) != 0 &&
2233 ses->password != NULL &&
2234 strncmp(ses->password,
2235 vol->password ? vol->password : "",
2236 MAX_PASSWORD_SIZE))
2237 return 0;
2238 }
2239 return 1;
2240}
2241
Steve French96daf2b2011-05-27 04:34:02 +00002242static struct cifs_ses *
Jeff Layton4ff67b72010-07-06 20:43:02 -04002243cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244{
Steve French96daf2b2011-05-27 04:34:02 +00002245 struct cifs_ses *ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002246
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302247 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton4ff67b72010-07-06 20:43:02 -04002248 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002249 if (!match_session(ses, vol))
2250 continue;
Jeff Layton14fbf502008-11-14 13:53:46 -05002251 ++ses->ses_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302252 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002253 return ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302255 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256 return NULL;
2257}
2258
Jeff Layton14fbf502008-11-14 13:53:46 -05002259static void
Steve French96daf2b2011-05-27 04:34:02 +00002260cifs_put_smb_ses(struct cifs_ses *ses)
Jeff Layton14fbf502008-11-14 13:53:46 -05002261{
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04002262 unsigned int xid;
Jeff Layton14fbf502008-11-14 13:53:46 -05002263 struct TCP_Server_Info *server = ses->server;
2264
Joe Perchesf96637b2013-05-04 22:12:25 -05002265 cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302266 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002267 if (--ses->ses_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302268 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002269 return;
2270 }
2271
2272 list_del_init(&ses->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302273 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002274
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04002275 if (ses->status == CifsGood && server->ops->logoff) {
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002276 xid = get_xid();
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04002277 server->ops->logoff(xid, ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002278 _free_xid(xid);
Jeff Layton14fbf502008-11-14 13:53:46 -05002279 }
2280 sesInfoFree(ses);
2281 cifs_put_tcp_session(server);
2282}
2283
Jeff Layton8a8798a2012-01-17 16:09:15 -05002284#ifdef CONFIG_KEYS
2285
2286/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
2287#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
2288
2289/* Populate username and pw fields from keyring if possible */
2290static int
2291cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2292{
2293 int rc = 0;
2294 char *desc, *delim, *payload;
2295 ssize_t len;
2296 struct key *key;
2297 struct TCP_Server_Info *server = ses->server;
2298 struct sockaddr_in *sa;
2299 struct sockaddr_in6 *sa6;
2300 struct user_key_payload *upayload;
2301
2302 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2303 if (!desc)
2304 return -ENOMEM;
2305
2306 /* try to find an address key first */
2307 switch (server->dstaddr.ss_family) {
2308 case AF_INET:
2309 sa = (struct sockaddr_in *)&server->dstaddr;
2310 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2311 break;
2312 case AF_INET6:
2313 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2314 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2315 break;
2316 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05002317 cifs_dbg(FYI, "Bad ss_family (%hu)\n",
2318 server->dstaddr.ss_family);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002319 rc = -EINVAL;
2320 goto out_err;
2321 }
2322
Joe Perchesf96637b2013-05-04 22:12:25 -05002323 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002324 key = request_key(&key_type_logon, desc, "");
2325 if (IS_ERR(key)) {
2326 if (!ses->domainName) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002327 cifs_dbg(FYI, "domainName is NULL\n");
Jeff Layton8a8798a2012-01-17 16:09:15 -05002328 rc = PTR_ERR(key);
2329 goto out_err;
2330 }
2331
2332 /* didn't work, try to find a domain key */
2333 sprintf(desc, "cifs:d:%s", ses->domainName);
Joe Perchesf96637b2013-05-04 22:12:25 -05002334 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002335 key = request_key(&key_type_logon, desc, "");
2336 if (IS_ERR(key)) {
2337 rc = PTR_ERR(key);
2338 goto out_err;
2339 }
2340 }
2341
2342 down_read(&key->sem);
2343 upayload = key->payload.data;
2344 if (IS_ERR_OR_NULL(upayload)) {
Jeff Layton4edc53c2012-02-07 06:30:51 -05002345 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
Jeff Layton8a8798a2012-01-17 16:09:15 -05002346 goto out_key_put;
2347 }
2348
2349 /* find first : in payload */
2350 payload = (char *)upayload->data;
2351 delim = strnchr(payload, upayload->datalen, ':');
Joe Perchesf96637b2013-05-04 22:12:25 -05002352 cifs_dbg(FYI, "payload=%s\n", payload);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002353 if (!delim) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002354 cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
2355 upayload->datalen);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002356 rc = -EINVAL;
2357 goto out_key_put;
2358 }
2359
2360 len = delim - payload;
2361 if (len > MAX_USERNAME_SIZE || len <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002362 cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
2363 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002364 rc = -EINVAL;
2365 goto out_key_put;
2366 }
2367
2368 vol->username = kstrndup(payload, len, GFP_KERNEL);
2369 if (!vol->username) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002370 cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
2371 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002372 rc = -ENOMEM;
2373 goto out_key_put;
2374 }
Joe Perchesf96637b2013-05-04 22:12:25 -05002375 cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002376
2377 len = key->datalen - (len + 1);
2378 if (len > MAX_PASSWORD_SIZE || len <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002379 cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002380 rc = -EINVAL;
2381 kfree(vol->username);
2382 vol->username = NULL;
2383 goto out_key_put;
2384 }
2385
2386 ++delim;
2387 vol->password = kstrndup(delim, len, GFP_KERNEL);
2388 if (!vol->password) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002389 cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
2390 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002391 rc = -ENOMEM;
2392 kfree(vol->username);
2393 vol->username = NULL;
2394 goto out_key_put;
2395 }
2396
2397out_key_put:
2398 up_read(&key->sem);
2399 key_put(key);
2400out_err:
2401 kfree(desc);
Joe Perchesf96637b2013-05-04 22:12:25 -05002402 cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002403 return rc;
2404}
2405#else /* ! CONFIG_KEYS */
2406static inline int
2407cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2408 struct cifs_ses *ses __attribute__((unused)))
2409{
2410 return -ENOSYS;
2411}
2412#endif /* CONFIG_KEYS */
2413
Steve French96daf2b2011-05-27 04:34:02 +00002414static struct cifs_ses *
Jeff Layton36988c72010-04-24 07:57:43 -04002415cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2416{
Pavel Shilovsky286170a2012-05-25 10:43:58 +04002417 int rc = -ENOMEM;
2418 unsigned int xid;
Steve French96daf2b2011-05-27 04:34:02 +00002419 struct cifs_ses *ses;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002420 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2421 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
Jeff Layton36988c72010-04-24 07:57:43 -04002422
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002423 xid = get_xid();
Jeff Layton36988c72010-04-24 07:57:43 -04002424
Jeff Layton4ff67b72010-07-06 20:43:02 -04002425 ses = cifs_find_smb_ses(server, volume_info);
Jeff Layton36988c72010-04-24 07:57:43 -04002426 if (ses) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002427 cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
2428 ses->status);
Jeff Layton36988c72010-04-24 07:57:43 -04002429
Jeff Layton36988c72010-04-24 07:57:43 -04002430 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04002431 rc = cifs_negotiate_protocol(xid, ses);
2432 if (rc) {
2433 mutex_unlock(&ses->session_mutex);
2434 /* problem -- put our ses reference */
2435 cifs_put_smb_ses(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002436 free_xid(xid);
Jeff Layton198b5682010-04-24 07:57:48 -04002437 return ERR_PTR(rc);
2438 }
Jeff Layton36988c72010-04-24 07:57:43 -04002439 if (ses->need_reconnect) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002440 cifs_dbg(FYI, "Session needs reconnect\n");
Jeff Layton36988c72010-04-24 07:57:43 -04002441 rc = cifs_setup_session(xid, ses,
2442 volume_info->local_nls);
2443 if (rc) {
2444 mutex_unlock(&ses->session_mutex);
2445 /* problem -- put our reference */
2446 cifs_put_smb_ses(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002447 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002448 return ERR_PTR(rc);
2449 }
2450 }
2451 mutex_unlock(&ses->session_mutex);
Jeff Layton460cf342010-09-14 11:38:24 -04002452
2453 /* existing SMB ses has a server reference already */
2454 cifs_put_tcp_session(server);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002455 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002456 return ses;
2457 }
2458
Joe Perchesf96637b2013-05-04 22:12:25 -05002459 cifs_dbg(FYI, "Existing smb sess not found\n");
Jeff Layton36988c72010-04-24 07:57:43 -04002460 ses = sesInfoAlloc();
2461 if (ses == NULL)
2462 goto get_ses_fail;
2463
2464 /* new SMB session uses our server ref */
2465 ses->server = server;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002466 if (server->dstaddr.ss_family == AF_INET6)
2467 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04002468 else
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002469 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04002470
Steve French8727c8a2011-02-25 01:11:56 -06002471 if (volume_info->username) {
2472 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2473 if (!ses->user_name)
2474 goto get_ses_fail;
2475 }
Jeff Layton36988c72010-04-24 07:57:43 -04002476
2477 /* volume_info->password freed at unmount */
2478 if (volume_info->password) {
2479 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2480 if (!ses->password)
2481 goto get_ses_fail;
2482 }
2483 if (volume_info->domainname) {
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05002484 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2485 if (!ses->domainName)
2486 goto get_ses_fail;
Jeff Layton36988c72010-04-24 07:57:43 -04002487 }
Jeff Layton3e4b3e12010-07-19 18:00:17 -04002488 ses->cred_uid = volume_info->cred_uid;
Jeff Layton36988c72010-04-24 07:57:43 -04002489 ses->linux_uid = volume_info->linux_uid;
Steve Frenchd9b94202011-04-12 01:24:57 +00002490
Jeff Layton36988c72010-04-24 07:57:43 -04002491 ses->overrideSecFlg = volume_info->secFlg;
2492
2493 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04002494 rc = cifs_negotiate_protocol(xid, ses);
2495 if (!rc)
2496 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
Jeff Layton36988c72010-04-24 07:57:43 -04002497 mutex_unlock(&ses->session_mutex);
Steve Frenchc8e56f12010-09-08 21:10:58 +00002498 if (rc)
Jeff Layton36988c72010-04-24 07:57:43 -04002499 goto get_ses_fail;
2500
2501 /* success, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302502 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002503 list_add(&ses->smb_ses_list, &server->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302504 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002505
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002506 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002507 return ses;
2508
2509get_ses_fail:
2510 sesInfoFree(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002511 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002512 return ERR_PTR(rc);
2513}
2514
Steve French96daf2b2011-05-27 04:34:02 +00002515static int match_tcon(struct cifs_tcon *tcon, const char *unc)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002516{
2517 if (tcon->tidStatus == CifsExiting)
2518 return 0;
2519 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2520 return 0;
2521 return 1;
2522}
2523
Steve French96daf2b2011-05-27 04:34:02 +00002524static struct cifs_tcon *
2525cifs_find_tcon(struct cifs_ses *ses, const char *unc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526{
2527 struct list_head *tmp;
Steve French96daf2b2011-05-27 04:34:02 +00002528 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302530 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002531 list_for_each(tmp, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +00002532 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002533 if (!match_tcon(tcon, unc))
Jeff Laytonf1987b42008-11-15 11:12:47 -05002534 continue;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002535 ++tcon->tc_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302536 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537 return tcon;
2538 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302539 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540 return NULL;
2541}
2542
Jeff Laytonf1987b42008-11-15 11:12:47 -05002543static void
Steve French96daf2b2011-05-27 04:34:02 +00002544cifs_put_tcon(struct cifs_tcon *tcon)
Jeff Laytonf1987b42008-11-15 11:12:47 -05002545{
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002546 unsigned int xid;
Steve French96daf2b2011-05-27 04:34:02 +00002547 struct cifs_ses *ses = tcon->ses;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002548
Joe Perchesf96637b2013-05-04 22:12:25 -05002549 cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302550 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002551 if (--tcon->tc_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302552 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002553 return;
2554 }
2555
2556 list_del_init(&tcon->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302557 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002558
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002559 xid = get_xid();
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002560 if (ses->server->ops->tree_disconnect)
2561 ses->server->ops->tree_disconnect(xid, tcon);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002562 _free_xid(xid);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002563
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302564 cifs_fscache_release_super_cookie(tcon);
Steve French9f841592010-07-23 20:37:53 +00002565 tconInfoFree(tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002566 cifs_put_smb_ses(ses);
2567}
2568
Steve French96daf2b2011-05-27 04:34:02 +00002569static struct cifs_tcon *
2570cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
Jeff Laytond00c28d2010-04-24 07:57:44 -04002571{
2572 int rc, xid;
Steve French96daf2b2011-05-27 04:34:02 +00002573 struct cifs_tcon *tcon;
Jeff Laytond00c28d2010-04-24 07:57:44 -04002574
2575 tcon = cifs_find_tcon(ses, volume_info->UNC);
2576 if (tcon) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002577 cifs_dbg(FYI, "Found match on UNC path\n");
Jeff Laytond00c28d2010-04-24 07:57:44 -04002578 /* existing tcon already has a reference */
2579 cifs_put_smb_ses(ses);
2580 if (tcon->seal != volume_info->seal)
Joe Perchesf96637b2013-05-04 22:12:25 -05002581 cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
Jeff Laytond00c28d2010-04-24 07:57:44 -04002582 return tcon;
2583 }
2584
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002585 if (!ses->server->ops->tree_connect) {
2586 rc = -ENOSYS;
2587 goto out_fail;
2588 }
2589
Jeff Laytond00c28d2010-04-24 07:57:44 -04002590 tcon = tconInfoAlloc();
2591 if (tcon == NULL) {
2592 rc = -ENOMEM;
2593 goto out_fail;
2594 }
2595
2596 tcon->ses = ses;
2597 if (volume_info->password) {
2598 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2599 if (!tcon->password) {
2600 rc = -ENOMEM;
2601 goto out_fail;
2602 }
2603 }
2604
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002605 /*
2606 * BB Do we need to wrap session_mutex around this TCon call and Unix
2607 * SetFS as we do on SessSetup and reconnect?
2608 */
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002609 xid = get_xid();
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002610 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2611 volume_info->local_nls);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002612 free_xid(xid);
Joe Perchesf96637b2013-05-04 22:12:25 -05002613 cifs_dbg(FYI, "Tcon rc = %d\n", rc);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002614 if (rc)
2615 goto out_fail;
2616
2617 if (volume_info->nodfs) {
2618 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
Joe Perchesf96637b2013-05-04 22:12:25 -05002619 cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002620 }
2621 tcon->seal = volume_info->seal;
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002622 /*
2623 * We can have only one retry value for a connection to a share so for
2624 * resources mounted more than once to the same server share the last
2625 * value passed in for the retry flag is used.
2626 */
Jeff Laytond00c28d2010-04-24 07:57:44 -04002627 tcon->retry = volume_info->retry;
2628 tcon->nocase = volume_info->nocase;
2629 tcon->local_lease = volume_info->local_lease;
Pavel Shilovsky233839b2012-09-19 06:22:45 -07002630 INIT_LIST_HEAD(&tcon->pending_opens);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002631
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302632 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002633 list_add(&tcon->tcon_list, &ses->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302634 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002635
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302636 cifs_fscache_get_super_cookie(tcon);
2637
Jeff Laytond00c28d2010-04-24 07:57:44 -04002638 return tcon;
2639
2640out_fail:
2641 tconInfoFree(tcon);
2642 return ERR_PTR(rc);
2643}
2644
Jeff Layton9d002df2010-10-06 19:51:11 -04002645void
2646cifs_put_tlink(struct tcon_link *tlink)
2647{
2648 if (!tlink || IS_ERR(tlink))
2649 return;
2650
2651 if (!atomic_dec_and_test(&tlink->tl_count) ||
2652 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2653 tlink->tl_time = jiffies;
2654 return;
2655 }
2656
2657 if (!IS_ERR(tlink_tcon(tlink)))
2658 cifs_put_tcon(tlink_tcon(tlink));
2659 kfree(tlink);
2660 return;
2661}
Jeff Laytond00c28d2010-04-24 07:57:44 -04002662
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002663static inline struct tcon_link *
Pavel Shilovskycd518752011-06-09 12:58:53 +04002664cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2665{
2666 return cifs_sb->master_tlink;
2667}
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002668
2669static int
2670compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2671{
2672 struct cifs_sb_info *old = CIFS_SB(sb);
2673 struct cifs_sb_info *new = mnt_data->cifs_sb;
2674
2675 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2676 return 0;
2677
2678 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2679 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2680 return 0;
2681
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002682 /*
Jeff Layton5eba8ab2011-10-19 15:30:26 -04002683 * We want to share sb only if we don't specify an r/wsize or
2684 * specified r/wsize is greater than or equal to existing one.
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002685 */
2686 if (new->wsize && new->wsize < old->wsize)
2687 return 0;
2688
Jeff Layton5eba8ab2011-10-19 15:30:26 -04002689 if (new->rsize && new->rsize < old->rsize)
2690 return 0;
2691
Eric W. Biederman1f682332013-02-06 01:20:20 -08002692 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002693 return 0;
2694
2695 if (old->mnt_file_mode != new->mnt_file_mode ||
2696 old->mnt_dir_mode != new->mnt_dir_mode)
2697 return 0;
2698
2699 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2700 return 0;
2701
2702 if (old->actimeo != new->actimeo)
2703 return 0;
2704
2705 return 1;
2706}
2707
2708int
2709cifs_match_super(struct super_block *sb, void *data)
2710{
2711 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2712 struct smb_vol *volume_info;
2713 struct cifs_sb_info *cifs_sb;
2714 struct TCP_Server_Info *tcp_srv;
Steve French96daf2b2011-05-27 04:34:02 +00002715 struct cifs_ses *ses;
2716 struct cifs_tcon *tcon;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002717 struct tcon_link *tlink;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002718 int rc = 0;
2719
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002720 spin_lock(&cifs_tcp_ses_lock);
2721 cifs_sb = CIFS_SB(sb);
2722 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2723 if (IS_ERR(tlink)) {
2724 spin_unlock(&cifs_tcp_ses_lock);
2725 return rc;
2726 }
2727 tcon = tlink_tcon(tlink);
2728 ses = tcon->ses;
2729 tcp_srv = ses->server;
2730
2731 volume_info = mnt_data->vol;
2732
Jeff Layton9fa114f2012-11-26 11:09:57 -05002733 if (!match_server(tcp_srv, volume_info) ||
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002734 !match_session(ses, volume_info) ||
2735 !match_tcon(tcon, volume_info->UNC)) {
2736 rc = 0;
2737 goto out;
2738 }
2739
2740 rc = compare_mount_options(sb, mnt_data);
2741out:
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002742 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf484b5d02011-07-11 10:16:34 -04002743 cifs_put_tlink(tlink);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002744 return rc;
2745}
2746
Linus Torvalds1da177e2005-04-16 15:20:36 -07002747int
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002748get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002749 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2750 struct dfs_info3_param **referrals, int remap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002751{
2752 char *temp_unc;
2753 int rc = 0;
2754
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002755 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002756 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002757
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002758 *num_referrals = 0;
2759 *referrals = NULL;
2760
2761 if (ses->ipc_tid == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762 temp_unc = kmalloc(2 /* for slashes */ +
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002763 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2764 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002765 if (temp_unc == NULL)
2766 return -ENOMEM;
2767 temp_unc[0] = '\\';
2768 temp_unc[1] = '\\';
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002769 strcpy(temp_unc + 2, ses->serverName);
2770 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2771 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2772 nls_codepage);
Joe Perchesf96637b2013-05-04 22:12:25 -05002773 cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774 kfree(temp_unc);
2775 }
2776 if (rc == 0)
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002777 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2778 referrals, num_referrals,
2779 nls_codepage, remap);
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002780 /*
2781 * BB - map targetUNCs to dfs_info3 structures, here or in
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002782 * ses->server->ops->get_dfs_refer.
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002783 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002784
2785 return rc;
2786}
2787
Jeff Layton09e50d52008-07-23 10:11:19 -04002788#ifdef CONFIG_DEBUG_LOCK_ALLOC
2789static struct lock_class_key cifs_key[2];
2790static struct lock_class_key cifs_slock_key[2];
2791
2792static inline void
2793cifs_reclassify_socket4(struct socket *sock)
2794{
2795 struct sock *sk = sock->sk;
2796 BUG_ON(sock_owned_by_user(sk));
2797 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2798 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2799}
2800
2801static inline void
2802cifs_reclassify_socket6(struct socket *sock)
2803{
2804 struct sock *sk = sock->sk;
2805 BUG_ON(sock_owned_by_user(sk));
2806 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2807 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2808}
2809#else
2810static inline void
2811cifs_reclassify_socket4(struct socket *sock)
2812{
2813}
2814
2815static inline void
2816cifs_reclassify_socket6(struct socket *sock)
2817{
2818}
2819#endif
2820
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821/* See RFC1001 section 14 on representation of Netbios names */
Steve French50c2f752007-07-13 00:33:32 +00002822static void rfc1002mangle(char *target, char *source, unsigned int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002823{
Steve French50c2f752007-07-13 00:33:32 +00002824 unsigned int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002825
Steve French50c2f752007-07-13 00:33:32 +00002826 for (i = 0, j = 0; i < (length); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002827 /* mask a nibble at a time and encode */
2828 target[j] = 'A' + (0x0F & (source[i] >> 4));
2829 target[j+1] = 'A' + (0x0F & source[i]);
Steve French50c2f752007-07-13 00:33:32 +00002830 j += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002831 }
2832
2833}
2834
Ben Greear3eb9a882010-09-01 17:06:02 -07002835static int
2836bind_socket(struct TCP_Server_Info *server)
2837{
2838 int rc = 0;
2839 if (server->srcaddr.ss_family != AF_UNSPEC) {
2840 /* Bind to the specified local IP address */
2841 struct socket *socket = server->ssocket;
2842 rc = socket->ops->bind(socket,
2843 (struct sockaddr *) &server->srcaddr,
2844 sizeof(server->srcaddr));
2845 if (rc < 0) {
2846 struct sockaddr_in *saddr4;
2847 struct sockaddr_in6 *saddr6;
2848 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2849 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2850 if (saddr6->sin6_family == AF_INET6)
Joe Perchesf96637b2013-05-04 22:12:25 -05002851 cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
2852 &saddr6->sin6_addr, rc);
Ben Greear3eb9a882010-09-01 17:06:02 -07002853 else
Joe Perchesf96637b2013-05-04 22:12:25 -05002854 cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
2855 &saddr4->sin_addr.s_addr, rc);
Ben Greear3eb9a882010-09-01 17:06:02 -07002856 }
2857 }
2858 return rc;
2859}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002860
2861static int
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002862ip_rfc1001_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002863{
2864 int rc = 0;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002865 /*
2866 * some servers require RFC1001 sessinit before sending
2867 * negprot - BB check reconnection in case where second
2868 * sessinit is sent but no second negprot
2869 */
2870 struct rfc1002_session_packet *ses_init_buf;
2871 struct smb_hdr *smb_buf;
2872 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2873 GFP_KERNEL);
2874 if (ses_init_buf) {
2875 ses_init_buf->trailer.session_req.called_len = 32;
2876
2877 if (server->server_RFC1001_name &&
2878 server->server_RFC1001_name[0] != 0)
2879 rfc1002mangle(ses_init_buf->trailer.
2880 session_req.called_name,
2881 server->server_RFC1001_name,
2882 RFC1001_NAME_LEN_WITH_NULL);
2883 else
2884 rfc1002mangle(ses_init_buf->trailer.
2885 session_req.called_name,
2886 DEFAULT_CIFS_CALLED_NAME,
2887 RFC1001_NAME_LEN_WITH_NULL);
2888
2889 ses_init_buf->trailer.session_req.calling_len = 32;
2890
2891 /*
2892 * calling name ends in null (byte 16) from old smb
2893 * convention.
2894 */
2895 if (server->workstation_RFC1001_name &&
2896 server->workstation_RFC1001_name[0] != 0)
2897 rfc1002mangle(ses_init_buf->trailer.
2898 session_req.calling_name,
2899 server->workstation_RFC1001_name,
2900 RFC1001_NAME_LEN_WITH_NULL);
2901 else
2902 rfc1002mangle(ses_init_buf->trailer.
2903 session_req.calling_name,
2904 "LINUX_CIFS_CLNT",
2905 RFC1001_NAME_LEN_WITH_NULL);
2906
2907 ses_init_buf->trailer.session_req.scope1 = 0;
2908 ses_init_buf->trailer.session_req.scope2 = 0;
2909 smb_buf = (struct smb_hdr *)ses_init_buf;
2910
2911 /* sizeof RFC1002_SESSION_REQUEST with no scope */
Steve Frenchbe8e3b02011-04-29 05:40:20 +00002912 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002913 rc = smb_send(server, smb_buf, 0x44);
2914 kfree(ses_init_buf);
2915 /*
2916 * RFC1001 layer in at least one server
2917 * requires very short break before negprot
2918 * presumably because not expecting negprot
2919 * to follow so fast. This is a simple
2920 * solution that works without
2921 * complicating the code and causes no
2922 * significant slowing down on mount
2923 * for everyone else
2924 */
2925 usleep_range(1000, 2000);
2926 }
2927 /*
2928 * else the negprot may still work without this
2929 * even though malloc failed
2930 */
2931
2932 return rc;
2933}
2934
2935static int
2936generic_ip_connect(struct TCP_Server_Info *server)
2937{
2938 int rc = 0;
Steve French6da97912011-03-13 18:55:55 +00002939 __be16 sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002940 int slen, sfamily;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002941 struct socket *socket = server->ssocket;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002942 struct sockaddr *saddr;
2943
2944 saddr = (struct sockaddr *) &server->dstaddr;
2945
2946 if (server->dstaddr.ss_family == AF_INET6) {
2947 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2948 slen = sizeof(struct sockaddr_in6);
2949 sfamily = AF_INET6;
2950 } else {
2951 sport = ((struct sockaddr_in *) saddr)->sin_port;
2952 slen = sizeof(struct sockaddr_in);
2953 sfamily = AF_INET;
2954 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002955
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002956 if (socket == NULL) {
Rob Landleyf1d0c992011-01-22 15:44:05 -06002957 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2958 IPPROTO_TCP, &socket, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002959 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002960 cifs_dbg(VFS, "Error %d creating socket\n", rc);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002961 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002963 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002964
2965 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesf96637b2013-05-04 22:12:25 -05002966 cifs_dbg(FYI, "Socket created\n");
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002967 server->ssocket = socket;
2968 socket->sk->sk_allocation = GFP_NOFS;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002969 if (sfamily == AF_INET6)
2970 cifs_reclassify_socket6(socket);
2971 else
2972 cifs_reclassify_socket4(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002973 }
2974
Ben Greear3eb9a882010-09-01 17:06:02 -07002975 rc = bind_socket(server);
2976 if (rc < 0)
2977 return rc;
2978
Jeff Laytond5c56052008-12-01 18:42:33 -05002979 /*
2980 * Eventually check for other socket options to change from
2981 * the default. sock_setsockopt not used because it expects
2982 * user space buffer
2983 */
2984 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00002985 socket->sk->sk_sndtimeo = 5 * HZ;
Steve French6a5fa2362010-01-01 01:28:43 +00002986
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002987 /* make the bufsizes depend on wsize/rsize and max requests */
2988 if (server->noautotune) {
2989 if (socket->sk->sk_sndbuf < (200 * 1024))
2990 socket->sk->sk_sndbuf = 200 * 1024;
2991 if (socket->sk->sk_rcvbuf < (140 * 1024))
2992 socket->sk->sk_rcvbuf = 140 * 1024;
2993 }
2994
Steve French6a5fa2362010-01-01 01:28:43 +00002995 if (server->tcp_nodelay) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002996 int val = 1;
Steve French6a5fa2362010-01-01 01:28:43 +00002997 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2998 (char *)&val, sizeof(val));
2999 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -05003000 cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n",
3001 rc);
Steve French6a5fa2362010-01-01 01:28:43 +00003002 }
3003
Joe Perchesf96637b2013-05-04 22:12:25 -05003004 cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003005 socket->sk->sk_sndbuf,
3006 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
3007
Jeff Laytonee1b3ea2011-06-21 07:18:26 -04003008 rc = socket->ops->connect(socket, saddr, slen, 0);
3009 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003010 cifs_dbg(FYI, "Error %d connecting to server\n", rc);
Jeff Laytonee1b3ea2011-06-21 07:18:26 -04003011 sock_release(socket);
3012 server->ssocket = NULL;
3013 return rc;
3014 }
3015
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003016 if (sport == htons(RFC1001_PORT))
3017 rc = ip_rfc1001_connect(server);
Steve French50c2f752007-07-13 00:33:32 +00003018
Linus Torvalds1da177e2005-04-16 15:20:36 -07003019 return rc;
3020}
3021
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003022static int
3023ip_connect(struct TCP_Server_Info *server)
3024{
Steve French6da97912011-03-13 18:55:55 +00003025 __be16 *sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003026 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3027 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
3028
3029 if (server->dstaddr.ss_family == AF_INET6)
3030 sport = &addr6->sin6_port;
3031 else
3032 sport = &addr->sin_port;
3033
3034 if (*sport == 0) {
3035 int rc;
3036
3037 /* try with 445 port at first */
3038 *sport = htons(CIFS_PORT);
3039
3040 rc = generic_ip_connect(server);
3041 if (rc >= 0)
3042 return rc;
3043
3044 /* if it failed, try with 139 port */
3045 *sport = htons(RFC1001_PORT);
3046 }
3047
3048 return generic_ip_connect(server);
3049}
3050
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003051void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
Al Viro2c6292a2011-06-17 09:05:48 -04003052 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
Steve French8af18972007-02-14 04:42:51 +00003053{
3054 /* if we are reconnecting then should we check to see if
3055 * any requested capabilities changed locally e.g. via
3056 * remount but we can not do much about it here
3057 * if they have (even if we could detect it by the following)
3058 * Perhaps we could add a backpointer to array of sb from tcon
3059 * or if we change to make all sb to same share the same
3060 * sb as NFS - then we only have one backpointer to sb.
3061 * What if we wanted to mount the server share twice once with
3062 * and once without posixacls or posix paths? */
3063 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00003064
Steve Frenchc18c8422007-07-18 23:21:09 +00003065 if (vol_info && vol_info->no_linux_ext) {
3066 tcon->fsUnixInfo.Capability = 0;
3067 tcon->unix_ext = 0; /* Unix Extensions disabled */
Joe Perchesf96637b2013-05-04 22:12:25 -05003068 cifs_dbg(FYI, "Linux protocol extensions disabled\n");
Steve Frenchc18c8422007-07-18 23:21:09 +00003069 return;
3070 } else if (vol_info)
3071 tcon->unix_ext = 1; /* Unix Extensions supported */
3072
3073 if (tcon->unix_ext == 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003074 cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
Steve Frenchc18c8422007-07-18 23:21:09 +00003075 return;
3076 }
Steve French50c2f752007-07-13 00:33:32 +00003077
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003078 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
Steve French8af18972007-02-14 04:42:51 +00003079 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Joe Perchesf96637b2013-05-04 22:12:25 -05003080 cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
Steve French8af18972007-02-14 04:42:51 +00003081 /* check for reconnect case in which we do not
3082 want to change the mount behavior if we can avoid it */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003083 if (vol_info == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003084 /* turn off POSIX ACL and PATHNAMES if not set
Steve French8af18972007-02-14 04:42:51 +00003085 originally at mount time */
3086 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3087 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00003088 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3089 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003090 cifs_dbg(VFS, "POSIXPATH support change\n");
Steve French8af18972007-02-14 04:42:51 +00003091 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00003092 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003093 cifs_dbg(VFS, "possible reconnect error\n");
3094 cifs_dbg(VFS, "server disabled POSIX path support\n");
Igor Mammedov11b6d642008-02-15 19:06:04 +00003095 }
Steve French8af18972007-02-14 04:42:51 +00003096 }
Steve French50c2f752007-07-13 00:33:32 +00003097
Steve French6848b732011-05-26 18:38:54 +00003098 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003099 cifs_dbg(VFS, "per-share encryption not supported yet\n");
Steve French6848b732011-05-26 18:38:54 +00003100
Steve French8af18972007-02-14 04:42:51 +00003101 cap &= CIFS_UNIX_CAP_MASK;
Steve French75865f8c2007-06-24 18:30:48 +00003102 if (vol_info && vol_info->no_psx_acl)
Steve French8af18972007-02-14 04:42:51 +00003103 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00003104 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003105 cifs_dbg(FYI, "negotiated posix acl support\n");
Al Viro2c6292a2011-06-17 09:05:48 -04003106 if (cifs_sb)
3107 cifs_sb->mnt_cifs_flags |=
3108 CIFS_MOUNT_POSIXACL;
Steve French8af18972007-02-14 04:42:51 +00003109 }
3110
Steve French75865f8c2007-06-24 18:30:48 +00003111 if (vol_info && vol_info->posix_paths == 0)
Steve French8af18972007-02-14 04:42:51 +00003112 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00003113 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003114 cifs_dbg(FYI, "negotiate posix pathnames\n");
Al Viro2c6292a2011-06-17 09:05:48 -04003115 if (cifs_sb)
3116 cifs_sb->mnt_cifs_flags |=
Steve French8af18972007-02-14 04:42:51 +00003117 CIFS_MOUNT_POSIX_PATHS;
3118 }
Steve French50c2f752007-07-13 00:33:32 +00003119
Joe Perchesf96637b2013-05-04 22:12:25 -05003120 cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
Steve French8af18972007-02-14 04:42:51 +00003121#ifdef CONFIG_CIFS_DEBUG2
Steve French75865f8c2007-06-24 18:30:48 +00003122 if (cap & CIFS_UNIX_FCNTL_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003123 cifs_dbg(FYI, "FCNTL cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003124 if (cap & CIFS_UNIX_EXTATTR_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003125 cifs_dbg(FYI, "EXTATTR cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003126 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003127 cifs_dbg(FYI, "POSIX path cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003128 if (cap & CIFS_UNIX_XATTR_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003129 cifs_dbg(FYI, "XATTR cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003130 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003131 cifs_dbg(FYI, "POSIX ACL cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003132 if (cap & CIFS_UNIX_LARGE_READ_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003133 cifs_dbg(FYI, "very large read cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003134 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003135 cifs_dbg(FYI, "very large write cap\n");
Steve French6848b732011-05-26 18:38:54 +00003136 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003137 cifs_dbg(FYI, "transport encryption cap\n");
Steve French6848b732011-05-26 18:38:54 +00003138 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003139 cifs_dbg(FYI, "mandatory transport encryption cap\n");
Steve French8af18972007-02-14 04:42:51 +00003140#endif /* CIFS_DEBUG2 */
3141 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
Steve French442aa312007-09-24 20:25:46 +00003142 if (vol_info == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003143 cifs_dbg(FYI, "resetting capabilities failed\n");
Steve French442aa312007-09-24 20:25:46 +00003144 } else
Joe Perchesf96637b2013-05-04 22:12:25 -05003145 cifs_dbg(VFS, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n");
Steve French5a44b312007-09-20 15:16:24 +00003146
Steve French8af18972007-02-14 04:42:51 +00003147 }
3148 }
3149}
3150
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003151void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3152 struct cifs_sb_info *cifs_sb)
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04003153{
Jeff Layton2de970f2010-10-06 19:51:12 -04003154 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3155
Al Viro2ced6f62011-06-17 09:20:04 -04003156 spin_lock_init(&cifs_sb->tlink_tree_lock);
3157 cifs_sb->tlink_tree = RB_ROOT;
3158
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003159 /*
Jeff Layton5eba8ab2011-10-19 15:30:26 -04003160 * Temporarily set r/wsize for matching superblock. If we end up using
3161 * new sb then client will later negotiate it downward if needed.
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003162 */
Jeff Layton5eba8ab2011-10-19 15:30:26 -04003163 cifs_sb->rsize = pvolume_info->rsize;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003164 cifs_sb->wsize = pvolume_info->wsize;
3165
Steve French3b795212008-11-13 19:45:32 +00003166 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3167 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3168 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3169 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
Joe Perchesf96637b2013-05-04 22:12:25 -05003170 cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n",
3171 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
Steve French3b795212008-11-13 19:45:32 +00003172
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05303173 cifs_sb->actimeo = pvolume_info->actimeo;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003174 cifs_sb->local_nls = pvolume_info->local_nls;
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05303175
Steve French3b795212008-11-13 19:45:32 +00003176 if (pvolume_info->noperm)
3177 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3178 if (pvolume_info->setuids)
3179 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3180 if (pvolume_info->server_ino)
3181 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3182 if (pvolume_info->remap)
3183 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3184 if (pvolume_info->no_xattr)
3185 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3186 if (pvolume_info->sfu_emul)
3187 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3188 if (pvolume_info->nobrl)
3189 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
Steve Frenchbe652442009-02-23 15:21:59 +00003190 if (pvolume_info->nostrictsync)
Steve French4717bed2009-02-24 14:44:19 +00003191 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
Steve French13a6e422008-12-02 17:24:33 +00003192 if (pvolume_info->mand_lock)
3193 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00003194 if (pvolume_info->rwpidforward)
3195 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
Steve French3b795212008-11-13 19:45:32 +00003196 if (pvolume_info->cifs_acl)
3197 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003198 if (pvolume_info->backupuid_specified) {
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05003199 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003200 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3201 }
3202 if (pvolume_info->backupgid_specified) {
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05003203 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003204 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3205 }
Steve French3b795212008-11-13 19:45:32 +00003206 if (pvolume_info->override_uid)
3207 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3208 if (pvolume_info->override_gid)
3209 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3210 if (pvolume_info->dynperm)
3211 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05303212 if (pvolume_info->fsc)
3213 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
Jeff Layton0eb8a132010-10-06 19:51:12 -04003214 if (pvolume_info->multiuser)
3215 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3216 CIFS_MOUNT_NO_PERM);
Pavel Shilovskyd39454f2011-01-24 14:16:35 -05003217 if (pvolume_info->strict_io)
3218 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
Steve French3b795212008-11-13 19:45:32 +00003219 if (pvolume_info->direct_io) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003220 cifs_dbg(FYI, "mounting share using direct i/o\n");
Steve French3b795212008-11-13 19:45:32 +00003221 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3222 }
Stefan Metzmacher736a3322010-07-30 14:56:00 +02003223 if (pvolume_info->mfsymlinks) {
3224 if (pvolume_info->sfu_emul) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003225 cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n");
Stefan Metzmacher736a3322010-07-30 14:56:00 +02003226 } else {
3227 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3228 }
3229 }
Steve French3b795212008-11-13 19:45:32 +00003230
3231 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
Joe Perchesf96637b2013-05-04 22:12:25 -05003232 cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04003233}
3234
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003235static void
3236cleanup_volume_info_contents(struct smb_vol *volume_info)
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003237{
Sean Finneyb9468452011-04-11 13:19:32 +00003238 kfree(volume_info->username);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003239 kzfree(volume_info->password);
Jesper Juhl95c75452011-08-27 18:58:34 +02003240 kfree(volume_info->UNC);
Sean Finneyb9468452011-04-11 13:19:32 +00003241 kfree(volume_info->domainname);
3242 kfree(volume_info->iocharset);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003243 kfree(volume_info->prepath);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003244}
3245
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003246void
3247cifs_cleanup_volume_info(struct smb_vol *volume_info)
3248{
3249 if (!volume_info)
3250 return;
3251 cleanup_volume_info_contents(volume_info);
3252 kfree(volume_info);
3253}
3254
3255
Steve French2d6d5892009-04-09 00:36:44 +00003256#ifdef CONFIG_CIFS_DFS_UPCALL
Steve French6d3ea7e2012-11-28 22:34:41 -06003257/*
3258 * cifs_build_path_to_root returns full path to root when we do not have an
3259 * exiting connection (tcon)
3260 */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003261static char *
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003262build_unc_path_to_root(const struct smb_vol *vol,
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003263 const struct cifs_sb_info *cifs_sb)
3264{
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003265 char *full_path, *pos;
Jeff Layton839db3d2012-12-10 06:10:45 -05003266 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003267 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003268
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003269 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003270 if (full_path == NULL)
3271 return ERR_PTR(-ENOMEM);
3272
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003273 strncpy(full_path, vol->UNC, unc_len);
3274 pos = full_path + unc_len;
3275
3276 if (pplen) {
Jeff Layton839db3d2012-12-10 06:10:45 -05003277 *pos++ = CIFS_DIR_SEP(cifs_sb);
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003278 strncpy(pos, vol->prepath, pplen);
3279 pos += pplen;
3280 }
3281
3282 *pos = '\0'; /* add trailing null */
Steve Frenchf87d39d2011-05-27 03:50:55 +00003283 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
Joe Perchesf96637b2013-05-04 22:12:25 -05003284 cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003285 return full_path;
3286}
Sean Finneydd613942011-04-11 13:19:30 +00003287
3288/*
3289 * Perform a dfs referral query for a share and (optionally) prefix
3290 *
Sean Finney046462a2011-04-11 13:19:33 +00003291 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3292 * to a string containing updated options for the submount. Otherwise it
3293 * will be left untouched.
Sean Finneydd613942011-04-11 13:19:30 +00003294 *
3295 * Returns the rc from get_dfs_path to the caller, which can be used to
3296 * determine whether there were referrals.
3297 */
3298static int
Pavel Shilovskyb669f332012-05-27 20:21:53 +04003299expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
Sean Finneydd613942011-04-11 13:19:30 +00003300 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
Sean Finney046462a2011-04-11 13:19:33 +00003301 int check_prefix)
Sean Finneydd613942011-04-11 13:19:30 +00003302{
3303 int rc;
3304 unsigned int num_referrals = 0;
3305 struct dfs_info3_param *referrals = NULL;
3306 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3307
3308 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3309 if (IS_ERR(full_path))
3310 return PTR_ERR(full_path);
3311
3312 /* For DFS paths, skip the first '\' of the UNC */
3313 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3314
Pavel Shilovskyb669f332012-05-27 20:21:53 +04003315 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
Sean Finneydd613942011-04-11 13:19:30 +00003316 &num_referrals, &referrals,
3317 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3318
3319 if (!rc && num_referrals > 0) {
3320 char *fake_devname = NULL;
3321
3322 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3323 full_path + 1, referrals,
3324 &fake_devname);
3325
3326 free_dfs_info_array(referrals, num_referrals);
Sean Finney046462a2011-04-11 13:19:33 +00003327
Sean Finneydd613942011-04-11 13:19:30 +00003328 if (IS_ERR(mdata)) {
3329 rc = PTR_ERR(mdata);
3330 mdata = NULL;
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003331 } else {
3332 cleanup_volume_info_contents(volume_info);
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003333 rc = cifs_setup_volume_info(volume_info, mdata,
3334 fake_devname);
Sean Finneydd613942011-04-11 13:19:30 +00003335 }
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003336 kfree(fake_devname);
3337 kfree(cifs_sb->mountdata);
Sean Finney046462a2011-04-11 13:19:33 +00003338 cifs_sb->mountdata = mdata;
Sean Finneydd613942011-04-11 13:19:30 +00003339 }
3340 kfree(full_path);
3341 return rc;
3342}
Steve French2d6d5892009-04-09 00:36:44 +00003343#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003344
Jeff Layton04db79b2011-07-06 08:10:38 -04003345static int
3346cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3347 const char *devname)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003348{
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003349 int rc = 0;
Sean Finneydd613942011-04-11 13:19:30 +00003350
Jeff Layton04db79b2011-07-06 08:10:38 -04003351 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3352 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003353
Jeff Layton7586b762008-12-01 18:41:49 -05003354 if (volume_info->nullauth) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003355 cifs_dbg(FYI, "Anonymous login\n");
Jeff Layton04febab2012-01-17 16:09:15 -05003356 kfree(volume_info->username);
3357 volume_info->username = NULL;
Jeff Layton7586b762008-12-01 18:41:49 -05003358 } else if (volume_info->username) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003359 /* BB fixme parse for domain name here */
Joe Perchesf96637b2013-05-04 22:12:25 -05003360 cifs_dbg(FYI, "Username: %s\n", volume_info->username);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003361 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -05003362 cifs_dbg(VFS, "No username specified\n");
Steve French50c2f752007-07-13 00:33:32 +00003363 /* In userspace mount helper we can get user name from alternate
3364 locations such as env variables and files on disk */
Jeff Layton04db79b2011-07-06 08:10:38 -04003365 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366 }
3367
Linus Torvalds1da177e2005-04-16 15:20:36 -07003368 /* this is needed for ASCII cp to Unicode converts */
Jeff Layton7586b762008-12-01 18:41:49 -05003369 if (volume_info->iocharset == NULL) {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003370 /* load_nls_default cannot return null */
3371 volume_info->local_nls = load_nls_default();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003372 } else {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003373 volume_info->local_nls = load_nls(volume_info->iocharset);
3374 if (volume_info->local_nls == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003375 cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
Joe Perchesb6b38f72010-04-21 03:50:45 +00003376 volume_info->iocharset);
Jeff Layton04db79b2011-07-06 08:10:38 -04003377 return -ELIBACC;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378 }
3379 }
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003380
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003381 return rc;
Jeff Layton04db79b2011-07-06 08:10:38 -04003382}
3383
3384struct smb_vol *
3385cifs_get_volume_info(char *mount_data, const char *devname)
3386{
3387 int rc;
3388 struct smb_vol *volume_info;
3389
Jeff Layton6ee95422012-11-26 11:09:57 -05003390 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
Jeff Layton04db79b2011-07-06 08:10:38 -04003391 if (!volume_info)
3392 return ERR_PTR(-ENOMEM);
3393
3394 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3395 if (rc) {
3396 cifs_cleanup_volume_info(volume_info);
3397 volume_info = ERR_PTR(rc);
3398 }
3399
3400 return volume_info;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003401}
3402
3403int
Al Viro2c6292a2011-06-17 09:05:48 -04003404cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003405{
Jeff Layton1daaae82012-03-21 06:30:40 -04003406 int rc;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003407 unsigned int xid;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003408 struct cifs_ses *ses;
Steve French96daf2b2011-05-27 04:34:02 +00003409 struct cifs_tcon *tcon;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003410 struct TCP_Server_Info *server;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003411 char *full_path;
3412 struct tcon_link *tlink;
3413#ifdef CONFIG_CIFS_DFS_UPCALL
3414 int referral_walks_count = 0;
Jeff Layton20547492011-07-09 12:21:07 -04003415#endif
Al Virodd854462011-06-17 08:24:42 -04003416
3417 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3418 if (rc)
3419 return rc;
3420
Jeff Layton20547492011-07-09 12:21:07 -04003421#ifdef CONFIG_CIFS_DFS_UPCALL
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003422try_mount_again:
3423 /* cleanup activities if we're chasing a referral */
3424 if (referral_walks_count) {
3425 if (tcon)
3426 cifs_put_tcon(tcon);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003427 else if (ses)
3428 cifs_put_smb_ses(ses);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003429
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003430 free_xid(xid);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003431 }
3432#endif
Jeff Layton1daaae82012-03-21 06:30:40 -04003433 rc = 0;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003434 tcon = NULL;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003435 ses = NULL;
3436 server = NULL;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003437 full_path = NULL;
3438 tlink = NULL;
3439
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003440 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003441
Jeff Layton63c038c2008-12-01 18:41:46 -05003442 /* get a reference to a tcp session */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003443 server = cifs_get_tcp_session(volume_info);
3444 if (IS_ERR(server)) {
3445 rc = PTR_ERR(server);
Al Virodd854462011-06-17 08:24:42 -04003446 bdi_destroy(&cifs_sb->bdi);
Jeff Layton63c038c2008-12-01 18:41:46 -05003447 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003448 }
3449
Jeff Layton36988c72010-04-24 07:57:43 -04003450 /* get a reference to a SMB session */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003451 ses = cifs_get_smb_ses(server, volume_info);
3452 if (IS_ERR(ses)) {
3453 rc = PTR_ERR(ses);
3454 ses = NULL;
Jeff Layton36988c72010-04-24 07:57:43 -04003455 goto mount_fail_check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003456 }
Steve French50c2f752007-07-13 00:33:32 +00003457
Jeff Laytond00c28d2010-04-24 07:57:44 -04003458 /* search for existing tcon to this server share */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003459 tcon = cifs_get_tcon(ses, volume_info);
Jeff Laytond00c28d2010-04-24 07:57:44 -04003460 if (IS_ERR(tcon)) {
3461 rc = PTR_ERR(tcon);
3462 tcon = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003463 goto remote_path_check;
Jeff Laytond00c28d2010-04-24 07:57:44 -04003464 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003465
Steve French6848b732011-05-26 18:38:54 +00003466 /* tell server which Unix caps we support */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003467 if (cap_unix(tcon->ses)) {
Steve French6848b732011-05-26 18:38:54 +00003468 /* reset of caps checks mount to see if unix extensions
3469 disabled for just this mount */
Al Viro2c6292a2011-06-17 09:05:48 -04003470 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
Steve French6848b732011-05-26 18:38:54 +00003471 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3472 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3473 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3474 rc = -EACCES;
3475 goto mount_fail_check;
3476 }
3477 } else
3478 tcon->unix_ext = 0; /* server does not support them */
3479
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003480 /* do not care if a following call succeed - informational */
3481 if (!tcon->ipc && server->ops->qfs_tcon)
3482 server->ops->qfs_tcon(xid, tcon);
Steve Frenchd82c2df2008-11-15 00:07:26 +00003483
Pavel Shilovsky24985c52012-09-18 16:20:28 -07003484 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3485 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
Jeff Laytonf7910cb2011-05-19 16:22:58 -04003486
Jeff Layton66bfaad2011-10-19 15:30:35 -04003487 /* tune readahead according to rsize */
Jeff Layton8f714652012-05-01 17:41:49 -04003488 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
Jeff Layton03ceace2010-12-06 21:07:33 -05003489
Igor Mammedove4cce942009-02-10 14:10:26 +03003490remote_path_check:
3491#ifdef CONFIG_CIFS_DFS_UPCALL
3492 /*
3493 * Perform an unconditional check for whether there are DFS
3494 * referrals for this path without prefix, to provide support
3495 * for DFS referrals from w2k8 servers which don't seem to respond
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003496 * with PATH_NOT_COVERED to requests that include the prefix.
3497 * Chase the referral if found, otherwise continue normally.
Steve Frenchd036f502009-04-03 03:12:08 +00003498 */
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003499 if (referral_walks_count == 0) {
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003500 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3501 false);
Steve Frencheeac8042006-01-13 21:34:58 -08003502 if (!refrc) {
Steve French4523cc32007-04-30 20:13:06 +00003503 referral_walks_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003504 goto try_mount_again;
3505 }
3506 }
3507#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003508
Steve Frenchf87d39d2011-05-27 03:50:55 +00003509 /* check if a whole path is not remote */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003510 if (!rc && tcon) {
Pavel Shilovsky68889f22012-05-25 14:40:22 +04003511 if (!server->ops->is_path_accessible) {
3512 rc = -ENOSYS;
3513 goto mount_fail_check;
3514 }
Steve French6d3ea7e2012-11-28 22:34:41 -06003515 /*
3516 * cifs_build_path_to_root works only when we have a valid tcon
3517 */
3518 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003519 if (full_path == NULL) {
3520 rc = -ENOMEM;
3521 goto mount_fail_check;
3522 }
Pavel Shilovsky68889f22012-05-25 14:40:22 +04003523 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3524 full_path);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003525 if (rc != 0 && rc != -EREMOTE) {
3526 kfree(full_path);
3527 goto mount_fail_check;
3528 }
3529 kfree(full_path);
3530 }
3531
3532 /* get referral if needed */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003533 if (rc == -EREMOTE) {
3534#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003535 if (referral_walks_count > MAX_NESTED_LINKS) {
3536 /*
3537 * BB: when we implement proper loop detection,
3538 * we will remove this check. But now we need it
3539 * to prevent an indefinite loop if 'DFS tree' is
3540 * misconfigured (i.e. has loops).
3541 */
3542 rc = -ELOOP;
3543 goto mount_fail_check;
3544 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003545
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003546 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
Jeff Layton7b91e262009-07-23 15:22:30 -04003547
Sean Finneydd613942011-04-11 13:19:30 +00003548 if (!rc) {
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003549 referral_walks_count++;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003550 goto try_mount_again;
3551 }
Sean Finneydd613942011-04-11 13:19:30 +00003552 goto mount_fail_check;
Steve Frenchd036f502009-04-03 03:12:08 +00003553#else /* No DFS support, return error on mount */
3554 rc = -EOPNOTSUPP;
3555#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003556 }
3557
Jeff Layton9d002df2010-10-06 19:51:11 -04003558 if (rc)
3559 goto mount_fail_check;
3560
3561 /* now, hang the tcon off of the superblock */
3562 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3563 if (tlink == NULL) {
3564 rc = -ENOMEM;
3565 goto mount_fail_check;
3566 }
3567
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003568 tlink->tl_uid = ses->linux_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -04003569 tlink->tl_tcon = tcon;
3570 tlink->tl_time = jiffies;
3571 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3572 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3573
Jeff Layton413e6612010-10-28 13:33:38 -04003574 cifs_sb->master_tlink = tlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04003575 spin_lock(&cifs_sb->tlink_tree_lock);
3576 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3577 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton413e6612010-10-28 13:33:38 -04003578
Jeff Laytonda472fc2012-03-23 14:40:53 -04003579 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
Jeff Layton2de970f2010-10-06 19:51:12 -04003580 TLINK_IDLE_EXPIRE);
3581
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003582mount_fail_check:
3583 /* on error free sesinfo and tcon struct if needed */
3584 if (rc) {
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003585 /* If find_unc succeeded then rc == 0 so we can not end */
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003586 /* up accidentally freeing someone elses tcon struct */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003587 if (tcon)
3588 cifs_put_tcon(tcon);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003589 else if (ses)
3590 cifs_put_smb_ses(ses);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003591 else
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003592 cifs_put_tcp_session(server);
Al Virodd854462011-06-17 08:24:42 -04003593 bdi_destroy(&cifs_sb->bdi);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003594 }
3595
Linus Torvalds1da177e2005-04-16 15:20:36 -07003596out:
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003597 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003598 return rc;
3599}
3600
Jeff Layton8d1bca32011-06-11 21:17:10 -04003601/*
3602 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3603 * pointer may be NULL.
3604 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003605int
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04003606CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
Steve French96daf2b2011-05-27 04:34:02 +00003607 const char *tree, struct cifs_tcon *tcon,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003608 const struct nls_table *nls_codepage)
3609{
3610 struct smb_hdr *smb_buffer;
3611 struct smb_hdr *smb_buffer_response;
3612 TCONX_REQ *pSMB;
3613 TCONX_RSP *pSMBr;
3614 unsigned char *bcc_ptr;
3615 int rc = 0;
Jeff Layton690c5222011-01-20 13:36:51 -05003616 int length;
3617 __u16 bytes_left, count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003618
3619 if (ses == NULL)
3620 return -EIO;
3621
3622 smb_buffer = cifs_buf_get();
Steve Frenchca43e3b2009-09-01 17:20:50 +00003623 if (smb_buffer == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003624 return -ENOMEM;
Steve Frenchca43e3b2009-09-01 17:20:50 +00003625
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626 smb_buffer_response = smb_buffer;
3627
3628 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3629 NULL /*no tid */ , 4 /*wct */ );
Steve French1982c342005-08-17 12:38:22 -07003630
Pavel Shilovsky88257362012-05-23 14:01:59 +04003631 smb_buffer->Mid = get_next_mid(ses->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003632 smb_buffer->Uid = ses->Suid;
3633 pSMB = (TCONX_REQ *) smb_buffer;
3634 pSMBr = (TCONX_RSP *) smb_buffer_response;
3635
3636 pSMB->AndXCommand = 0xFF;
3637 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003638 bcc_ptr = &pSMB->Password[0];
Jeff Layton8d1bca32011-06-11 21:17:10 -04003639 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
Steve Frencheeac8042006-01-13 21:34:58 -08003640 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
Steve French7c7b25b2006-06-01 19:20:10 +00003641 *bcc_ptr = 0; /* password is null byte */
Steve Frencheeac8042006-01-13 21:34:58 -08003642 bcc_ptr++; /* skip password */
Steve French7c7b25b2006-06-01 19:20:10 +00003643 /* already aligned so no need to do it below */
Steve Frencheeac8042006-01-13 21:34:58 -08003644 } else {
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003645 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
Steve Frencheeac8042006-01-13 21:34:58 -08003646 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3647 specified as required (when that support is added to
3648 the vfs in the future) as only NTLM or the much
Steve French7c7b25b2006-06-01 19:20:10 +00003649 weaker LANMAN (which we do not send by default) is accepted
Steve Frencheeac8042006-01-13 21:34:58 -08003650 by Samba (not sure whether other servers allow
3651 NTLMv2 password here) */
Steve French7c7b25b2006-06-01 19:20:10 +00003652#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton04912d62010-04-24 07:57:45 -04003653 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
Jeff Layton00e485b2008-12-05 20:41:21 -05003654 (ses->server->secType == LANMAN))
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -05003655 calc_lanman_hash(tcon->password, ses->server->cryptkey,
Steve French96daf2b2011-05-27 04:34:02 +00003656 ses->server->sec_mode &
Jeff Layton4e53a3f2008-12-05 20:41:21 -05003657 SECMODE_PW_ENCRYPT ? true : false,
3658 bcc_ptr);
Steve French7c7b25b2006-06-01 19:20:10 +00003659 else
3660#endif /* CIFS_WEAK_PW_HASH */
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -06003661 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
Shirish Pargaonkar9ef59922011-10-20 13:21:59 -05003662 bcc_ptr, nls_codepage);
Steve Frencheeac8042006-01-13 21:34:58 -08003663
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003664 bcc_ptr += CIFS_AUTH_RESP_SIZE;
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003665 if (ses->capabilities & CAP_UNICODE) {
Steve French7c7b25b2006-06-01 19:20:10 +00003666 /* must align unicode strings */
3667 *bcc_ptr = 0; /* null byte password */
3668 bcc_ptr++;
3669 }
Steve Frencheeac8042006-01-13 21:34:58 -08003670 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003671
Steve French96daf2b2011-05-27 04:34:02 +00003672 if (ses->server->sec_mode &
Steve Frencha878fb22006-05-30 18:04:19 +00003673 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003674 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3675
3676 if (ses->capabilities & CAP_STATUS32) {
3677 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3678 }
3679 if (ses->capabilities & CAP_DFS) {
3680 smb_buffer->Flags2 |= SMBFLG2_DFS;
3681 }
3682 if (ses->capabilities & CAP_UNICODE) {
3683 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3684 length =
Steve Frenchacbbb762012-01-18 22:32:33 -06003685 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
Steve French50c2f752007-07-13 00:33:32 +00003686 6 /* max utf8 char length in bytes */ *
Steve Frencha878fb22006-05-30 18:04:19 +00003687 (/* server len*/ + 256 /* share len */), nls_codepage);
3688 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003689 bcc_ptr += 2; /* skip trailing null */
3690 } else { /* ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003691 strcpy(bcc_ptr, tree);
3692 bcc_ptr += strlen(tree) + 1;
3693 }
3694 strcpy(bcc_ptr, "?????");
3695 bcc_ptr += strlen("?????");
3696 bcc_ptr += 1;
3697 count = bcc_ptr - &pSMB->Password[0];
Steve Frenchbe8e3b02011-04-29 05:40:20 +00003698 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3699 pSMB->hdr.smb_buf_length) + count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003700 pSMB->ByteCount = cpu_to_le16(count);
3701
Steve French133672e2007-11-13 22:41:37 +00003702 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
Jeff Layton77499812011-01-11 07:24:23 -05003703 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003704
Linus Torvalds1da177e2005-04-16 15:20:36 -07003705 /* above now done in SendReceive */
3706 if ((rc == 0) && (tcon != NULL)) {
Steve French0e0d2cf2009-05-01 05:27:32 +00003707 bool is_unicode;
3708
Linus Torvalds1da177e2005-04-16 15:20:36 -07003709 tcon->tidStatus = CifsGood;
Steve French3b795212008-11-13 19:45:32 +00003710 tcon->need_reconnect = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003711 tcon->tid = smb_buffer_response->Tid;
3712 bcc_ptr = pByteArea(smb_buffer_response);
Jeff Layton690c5222011-01-20 13:36:51 -05003713 bytes_left = get_bcc(smb_buffer_response);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003714 length = strnlen(bcc_ptr, bytes_left - 2);
Steve French0e0d2cf2009-05-01 05:27:32 +00003715 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3716 is_unicode = true;
3717 else
3718 is_unicode = false;
3719
Jeff Laytoncc20c032009-04-30 07:16:21 -04003720
Steve French50c2f752007-07-13 00:33:32 +00003721 /* skip service field (NB: this field is always ASCII) */
Steve French7f8ed422007-09-28 22:28:55 +00003722 if (length == 3) {
3723 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3724 (bcc_ptr[2] == 'C')) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003725 cifs_dbg(FYI, "IPC connection\n");
Steve French7f8ed422007-09-28 22:28:55 +00003726 tcon->ipc = 1;
3727 }
3728 } else if (length == 2) {
3729 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3730 /* the most common case */
Joe Perchesf96637b2013-05-04 22:12:25 -05003731 cifs_dbg(FYI, "disk share connection\n");
Steve French7f8ed422007-09-28 22:28:55 +00003732 }
3733 }
Steve French50c2f752007-07-13 00:33:32 +00003734 bcc_ptr += length + 1;
Jeff Laytoncc20c032009-04-30 07:16:21 -04003735 bytes_left -= (length + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003736 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003737
3738 /* mostly informational -- no need to fail on error here */
Jeff Layton90a98b22009-07-20 13:40:52 -04003739 kfree(tcon->nativeFileSystem);
Steve Frenchacbbb762012-01-18 22:32:33 -06003740 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
Steve French0e0d2cf2009-05-01 05:27:32 +00003741 bytes_left, is_unicode,
Jeff Laytoncc20c032009-04-30 07:16:21 -04003742 nls_codepage);
3743
Joe Perchesf96637b2013-05-04 22:12:25 -05003744 cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003745
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003746 if ((smb_buffer_response->WordCount == 3) ||
Steve French1a4e15a2006-10-12 21:33:51 +00003747 (smb_buffer_response->WordCount == 7))
3748 /* field is in same location */
Steve French39798772006-05-31 22:40:51 +00003749 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3750 else
3751 tcon->Flags = 0;
Joe Perchesf96637b2013-05-04 22:12:25 -05003752 cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003753 } else if ((rc == 0) && tcon == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003754 /* all we need to save for IPC$ connection */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003755 ses->ipc_tid = smb_buffer_response->Tid;
3756 }
3757
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +00003758 cifs_buf_release(smb_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003759 return rc;
3760}
3761
Al Viro2a9b9952011-06-17 09:27:16 -04003762void
3763cifs_umount(struct cifs_sb_info *cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003764{
Jeff Laytonb647c352010-10-28 11:16:44 -04003765 struct rb_root *root = &cifs_sb->tlink_tree;
3766 struct rb_node *node;
3767 struct tcon_link *tlink;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003768
Jeff Layton2de970f2010-10-06 19:51:12 -04003769 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3770
Jeff Laytonb647c352010-10-28 11:16:44 -04003771 spin_lock(&cifs_sb->tlink_tree_lock);
3772 while ((node = rb_first(root))) {
3773 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3774 cifs_get_tlink(tlink);
3775 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3776 rb_erase(node, root);
Steve French50c2f752007-07-13 00:33:32 +00003777
Jeff Laytonb647c352010-10-28 11:16:44 -04003778 spin_unlock(&cifs_sb->tlink_tree_lock);
3779 cifs_put_tlink(tlink);
3780 spin_lock(&cifs_sb->tlink_tree_lock);
3781 }
3782 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003783
Al Virodd854462011-06-17 08:24:42 -04003784 bdi_destroy(&cifs_sb->bdi);
Al Virod757d712011-06-17 09:42:43 -04003785 kfree(cifs_sb->mountdata);
3786 unload_nls(cifs_sb->local_nls);
3787 kfree(cifs_sb);
Steve French50c2f752007-07-13 00:33:32 +00003788}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003789
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003790int
3791cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003792{
3793 int rc = 0;
Jeff Layton198b5682010-04-24 07:57:48 -04003794 struct TCP_Server_Info *server = ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003795
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003796 if (!server->ops->need_neg || !server->ops->negotiate)
3797 return -ENOSYS;
3798
Jeff Layton198b5682010-04-24 07:57:48 -04003799 /* only send once per connect */
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003800 if (!server->ops->need_neg(server))
Jeff Layton198b5682010-04-24 07:57:48 -04003801 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003802
Pavel Shilovsky45275782012-05-17 17:53:29 +04003803 set_credits(server, 1);
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003804
3805 rc = server->ops->negotiate(xid, ses);
Jeff Layton198b5682010-04-24 07:57:48 -04003806 if (rc == 0) {
3807 spin_lock(&GlobalMid_Lock);
Jeff Layton7fdbaa12011-06-10 16:14:57 -04003808 if (server->tcpStatus == CifsNeedNegotiate)
Jeff Layton198b5682010-04-24 07:57:48 -04003809 server->tcpStatus = CifsGood;
3810 else
3811 rc = -EHOSTDOWN;
3812 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003813 }
Steve French26b994f2008-08-06 05:11:33 +00003814
Jeff Layton198b5682010-04-24 07:57:48 -04003815 return rc;
3816}
Steve French26b994f2008-08-06 05:11:33 +00003817
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003818int
3819cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3820 struct nls_table *nls_info)
Jeff Layton198b5682010-04-24 07:57:48 -04003821{
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003822 int rc = -ENOSYS;
Jeff Layton198b5682010-04-24 07:57:48 -04003823 struct TCP_Server_Info *server = ses->server;
3824
3825 ses->flags = 0;
3826 ses->capabilities = server->capabilities;
Steve French26b994f2008-08-06 05:11:33 +00003827 if (linuxExtEnabled == 0)
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003828 ses->capabilities &= (~server->vals->cap_unix);
Steve French20418ac2009-04-30 16:13:32 +00003829
Joe Perchesf96637b2013-05-04 22:12:25 -05003830 cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
Steve French96daf2b2011-05-27 04:34:02 +00003831 server->sec_mode, server->capabilities, server->timeAdj);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04003832
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003833 if (server->ops->sess_setup)
3834 rc = server->ops->sess_setup(xid, ses, nls_info);
3835
Steve French26b994f2008-08-06 05:11:33 +00003836 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003837 cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
Steve French26b994f2008-08-06 05:11:33 +00003838 } else {
Dan Carpenterb13ce4b2013-04-10 14:43:00 +03003839 mutex_lock(&server->srv_mutex);
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003840 if (!server->session_estab) {
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003841 server->session_key.response = ses->auth_key.response;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003842 server->session_key.len = ses->auth_key.len;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003843 server->sequence_number = 0x2;
3844 server->session_estab = true;
3845 ses->auth_key.response = NULL;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003846 }
3847 mutex_unlock(&server->srv_mutex);
3848
Joe Perchesf96637b2013-05-04 22:12:25 -05003849 cifs_dbg(FYI, "CIFS Session Established successfully\n");
Steve French20418ac2009-04-30 16:13:32 +00003850 spin_lock(&GlobalMid_Lock);
Jeff Layton198b5682010-04-24 07:57:48 -04003851 ses->status = CifsGood;
3852 ses->need_reconnect = false;
Steve French20418ac2009-04-30 16:13:32 +00003853 spin_unlock(&GlobalMid_Lock);
Steve French26b994f2008-08-06 05:11:33 +00003854 }
3855
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003856 kfree(ses->auth_key.response);
3857 ses->auth_key.response = NULL;
3858 ses->auth_key.len = 0;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05003859 kfree(ses->ntlmssp);
3860 ses->ntlmssp = NULL;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003861
Linus Torvalds1da177e2005-04-16 15:20:36 -07003862 return rc;
3863}
3864
Jeff Layton8a8798a2012-01-17 16:09:15 -05003865static int
3866cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3867{
3868 switch (ses->server->secType) {
3869 case Kerberos:
3870 vol->secFlg = CIFSSEC_MUST_KRB5;
3871 return 0;
3872 case NTLMv2:
3873 vol->secFlg = CIFSSEC_MUST_NTLMV2;
3874 break;
3875 case NTLM:
3876 vol->secFlg = CIFSSEC_MUST_NTLM;
3877 break;
3878 case RawNTLMSSP:
3879 vol->secFlg = CIFSSEC_MUST_NTLMSSP;
3880 break;
3881 case LANMAN:
3882 vol->secFlg = CIFSSEC_MUST_LANMAN;
3883 break;
3884 }
3885
3886 return cifs_set_cifscreds(vol, ses);
3887}
3888
Steve French96daf2b2011-05-27 04:34:02 +00003889static struct cifs_tcon *
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003890cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
Jeff Layton9d002df2010-10-06 19:51:11 -04003891{
Jeff Layton8a8798a2012-01-17 16:09:15 -05003892 int rc;
Steve French96daf2b2011-05-27 04:34:02 +00003893 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3894 struct cifs_ses *ses;
3895 struct cifs_tcon *tcon = NULL;
Jeff Layton9d002df2010-10-06 19:51:11 -04003896 struct smb_vol *vol_info;
Jeff Layton9d002df2010-10-06 19:51:11 -04003897
3898 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
Dan Carpenter803ab972012-01-24 11:39:22 +03003899 if (vol_info == NULL)
3900 return ERR_PTR(-ENOMEM);
Jeff Layton9d002df2010-10-06 19:51:11 -04003901
Jeff Layton9d002df2010-10-06 19:51:11 -04003902 vol_info->local_nls = cifs_sb->local_nls;
3903 vol_info->linux_uid = fsuid;
3904 vol_info->cred_uid = fsuid;
3905 vol_info->UNC = master_tcon->treeName;
3906 vol_info->retry = master_tcon->retry;
3907 vol_info->nocase = master_tcon->nocase;
3908 vol_info->local_lease = master_tcon->local_lease;
3909 vol_info->no_linux_ext = !master_tcon->unix_ext;
3910
Jeff Layton8a8798a2012-01-17 16:09:15 -05003911 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3912 if (rc) {
3913 tcon = ERR_PTR(rc);
3914 goto out;
3915 }
Jeff Layton9d002df2010-10-06 19:51:11 -04003916
3917 /* get a reference for the same TCP session */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303918 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003919 ++master_tcon->ses->server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303920 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003921
3922 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3923 if (IS_ERR(ses)) {
Steve French96daf2b2011-05-27 04:34:02 +00003924 tcon = (struct cifs_tcon *)ses;
Jeff Layton9d002df2010-10-06 19:51:11 -04003925 cifs_put_tcp_session(master_tcon->ses->server);
3926 goto out;
3927 }
3928
3929 tcon = cifs_get_tcon(ses, vol_info);
3930 if (IS_ERR(tcon)) {
3931 cifs_put_smb_ses(ses);
3932 goto out;
3933 }
3934
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003935 if (cap_unix(ses))
Jeff Layton9d002df2010-10-06 19:51:11 -04003936 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3937out:
Jeff Layton8a8798a2012-01-17 16:09:15 -05003938 kfree(vol_info->username);
3939 kfree(vol_info->password);
Jeff Layton9d002df2010-10-06 19:51:11 -04003940 kfree(vol_info);
3941
3942 return tcon;
3943}
3944
Steve French96daf2b2011-05-27 04:34:02 +00003945struct cifs_tcon *
Jeff Layton9d002df2010-10-06 19:51:11 -04003946cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3947{
3948 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3949}
3950
3951static int
3952cifs_sb_tcon_pending_wait(void *unused)
3953{
3954 schedule();
3955 return signal_pending(current) ? -ERESTARTSYS : 0;
3956}
3957
Jeff Laytonb647c352010-10-28 11:16:44 -04003958/* find and return a tlink with given uid */
3959static struct tcon_link *
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003960tlink_rb_search(struct rb_root *root, kuid_t uid)
Jeff Laytonb647c352010-10-28 11:16:44 -04003961{
3962 struct rb_node *node = root->rb_node;
3963 struct tcon_link *tlink;
3964
3965 while (node) {
3966 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3967
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003968 if (uid_gt(tlink->tl_uid, uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003969 node = node->rb_left;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003970 else if (uid_lt(tlink->tl_uid, uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003971 node = node->rb_right;
3972 else
3973 return tlink;
3974 }
3975 return NULL;
3976}
3977
3978/* insert a tcon_link into the tree */
3979static void
3980tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3981{
3982 struct rb_node **new = &(root->rb_node), *parent = NULL;
3983 struct tcon_link *tlink;
3984
3985 while (*new) {
3986 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3987 parent = *new;
3988
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003989 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003990 new = &((*new)->rb_left);
3991 else
3992 new = &((*new)->rb_right);
3993 }
3994
3995 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3996 rb_insert_color(&new_tlink->tl_rbnode, root);
3997}
3998
Jeff Layton9d002df2010-10-06 19:51:11 -04003999/*
4000 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
4001 * current task.
4002 *
4003 * If the superblock doesn't refer to a multiuser mount, then just return
4004 * the master tcon for the mount.
4005 *
Suresh Jayaraman6ef933a2010-11-03 10:53:49 +05304006 * First, search the rbtree for an existing tcon for this fsuid. If one
Jeff Layton9d002df2010-10-06 19:51:11 -04004007 * exists, then check to see if it's pending construction. If it is then wait
4008 * for construction to complete. Once it's no longer pending, check to see if
4009 * it failed and either return an error or retry construction, depending on
4010 * the timeout.
4011 *
4012 * If one doesn't exist then insert a new tcon_link struct into the tree and
4013 * try to construct a new one.
4014 */
4015struct tcon_link *
4016cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4017{
4018 int ret;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08004019 kuid_t fsuid = current_fsuid();
Jeff Layton9d002df2010-10-06 19:51:11 -04004020 struct tcon_link *tlink, *newtlink;
4021
4022 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4023 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4024
4025 spin_lock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04004026 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04004027 if (tlink)
4028 cifs_get_tlink(tlink);
4029 spin_unlock(&cifs_sb->tlink_tree_lock);
4030
4031 if (tlink == NULL) {
4032 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4033 if (newtlink == NULL)
4034 return ERR_PTR(-ENOMEM);
Jeff Laytonb647c352010-10-28 11:16:44 -04004035 newtlink->tl_uid = fsuid;
Jeff Layton9d002df2010-10-06 19:51:11 -04004036 newtlink->tl_tcon = ERR_PTR(-EACCES);
4037 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4038 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4039 cifs_get_tlink(newtlink);
4040
Jeff Layton9d002df2010-10-06 19:51:11 -04004041 spin_lock(&cifs_sb->tlink_tree_lock);
4042 /* was one inserted after previous search? */
Jeff Laytonb647c352010-10-28 11:16:44 -04004043 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04004044 if (tlink) {
4045 cifs_get_tlink(tlink);
4046 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04004047 kfree(newtlink);
4048 goto wait_for_construction;
4049 }
Jeff Layton9d002df2010-10-06 19:51:11 -04004050 tlink = newtlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04004051 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4052 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04004053 } else {
4054wait_for_construction:
4055 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4056 cifs_sb_tcon_pending_wait,
4057 TASK_INTERRUPTIBLE);
4058 if (ret) {
4059 cifs_put_tlink(tlink);
4060 return ERR_PTR(ret);
4061 }
4062
4063 /* if it's good, return it */
4064 if (!IS_ERR(tlink->tl_tcon))
4065 return tlink;
4066
4067 /* return error if we tried this already recently */
4068 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4069 cifs_put_tlink(tlink);
4070 return ERR_PTR(-EACCES);
4071 }
4072
4073 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4074 goto wait_for_construction;
4075 }
4076
4077 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4078 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4079 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4080
4081 if (IS_ERR(tlink->tl_tcon)) {
4082 cifs_put_tlink(tlink);
4083 return ERR_PTR(-EACCES);
4084 }
4085
4086 return tlink;
4087}
Jeff Layton2de970f2010-10-06 19:51:12 -04004088
4089/*
4090 * periodic workqueue job that scans tcon_tree for a superblock and closes
4091 * out tcons.
4092 */
4093static void
4094cifs_prune_tlinks(struct work_struct *work)
4095{
4096 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4097 prune_tlinks.work);
Jeff Laytonb647c352010-10-28 11:16:44 -04004098 struct rb_root *root = &cifs_sb->tlink_tree;
4099 struct rb_node *node = rb_first(root);
4100 struct rb_node *tmp;
4101 struct tcon_link *tlink;
Jeff Layton2de970f2010-10-06 19:51:12 -04004102
Jeff Laytonb647c352010-10-28 11:16:44 -04004103 /*
4104 * Because we drop the spinlock in the loop in order to put the tlink
4105 * it's not guarded against removal of links from the tree. The only
4106 * places that remove entries from the tree are this function and
4107 * umounts. Because this function is non-reentrant and is canceled
4108 * before umount can proceed, this is safe.
4109 */
4110 spin_lock(&cifs_sb->tlink_tree_lock);
4111 node = rb_first(root);
4112 while (node != NULL) {
4113 tmp = node;
4114 node = rb_next(tmp);
4115 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4116
4117 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4118 atomic_read(&tlink->tl_count) != 0 ||
4119 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4120 continue;
4121
4122 cifs_get_tlink(tlink);
4123 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4124 rb_erase(tmp, root);
4125
Jeff Layton2de970f2010-10-06 19:51:12 -04004126 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04004127 cifs_put_tlink(tlink);
4128 spin_lock(&cifs_sb->tlink_tree_lock);
4129 }
4130 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton2de970f2010-10-06 19:51:12 -04004131
Jeff Laytonda472fc2012-03-23 14:40:53 -04004132 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
Jeff Layton2de970f2010-10-06 19:51:12 -04004133 TLINK_IDLE_EXPIRE);
4134}