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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 Laytona0b3df52013-05-24 07:40:59 -040088 Opt_multiuser, Opt_sloppy, Opt_nosharesock,
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" },
Jeff Laytona0b3df52013-05-24 07:40:59 -0400168 { Opt_nosharesock, "nosharesock" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400169
170 { Opt_backupuid, "backupuid=%s" },
171 { Opt_backupgid, "backupgid=%s" },
172 { Opt_uid, "uid=%s" },
173 { Opt_cruid, "cruid=%s" },
174 { Opt_gid, "gid=%s" },
175 { Opt_file_mode, "file_mode=%s" },
176 { Opt_dirmode, "dirmode=%s" },
177 { Opt_dirmode, "dir_mode=%s" },
178 { Opt_port, "port=%s" },
179 { Opt_rsize, "rsize=%s" },
180 { Opt_wsize, "wsize=%s" },
181 { Opt_actimeo, "actimeo=%s" },
182
Sachin Prabhu4fe9e962012-04-10 18:12:27 +0100183 { Opt_blank_user, "user=" },
184 { Opt_blank_user, "username=" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400185 { Opt_user, "user=%s" },
186 { Opt_user, "username=%s" },
187 { Opt_blank_pass, "pass=" },
Jesper Nilsson3c15b4c2012-11-29 17:31:16 +0100188 { Opt_blank_pass, "password=" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400189 { Opt_pass, "pass=%s" },
190 { Opt_pass, "password=%s" },
Sachin Prabhu4fe9e962012-04-10 18:12:27 +0100191 { Opt_blank_ip, "ip=" },
192 { Opt_blank_ip, "addr=" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400193 { Opt_ip, "ip=%s" },
194 { Opt_ip, "addr=%s" },
Jeff Layton73a999f2013-03-22 08:42:57 -0400195 { Opt_ignore, "unc=%s" },
196 { Opt_ignore, "target=%s" },
197 { Opt_ignore, "path=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400198 { Opt_domain, "dom=%s" },
199 { Opt_domain, "domain=%s" },
200 { Opt_domain, "workgroup=%s" },
201 { Opt_srcaddr, "srcaddr=%s" },
Jeff Layton73a999f2013-03-22 08:42:57 -0400202 { Opt_ignore, "prefixpath=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400203 { Opt_iocharset, "iocharset=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400204 { Opt_netbiosname, "netbiosname=%s" },
205 { Opt_servern, "servern=%s" },
206 { Opt_ver, "ver=%s" },
Jeff Layton23db65f2012-05-15 12:20:51 -0400207 { Opt_vers, "vers=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400208 { Opt_sec, "sec=%s" },
Jeff Layton15b6a472012-05-16 07:50:15 -0400209 { Opt_cache, "cache=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400210
211 { Opt_ignore, "cred" },
212 { Opt_ignore, "credentials" },
Jeff Laytona557b972012-05-02 14:02:40 -0400213 { Opt_ignore, "cred=%s" },
214 { Opt_ignore, "credentials=%s" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400215 { Opt_ignore, "guest" },
216 { Opt_ignore, "rw" },
217 { Opt_ignore, "ro" },
218 { Opt_ignore, "suid" },
219 { Opt_ignore, "nosuid" },
220 { Opt_ignore, "exec" },
221 { Opt_ignore, "noexec" },
222 { Opt_ignore, "nodev" },
223 { Opt_ignore, "noauto" },
224 { Opt_ignore, "dev" },
225 { Opt_ignore, "mand" },
226 { Opt_ignore, "nomand" },
227 { Opt_ignore, "_netdev" },
228
229 { Opt_err, NULL }
230};
231
232enum {
233 Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p,
234 Opt_sec_ntlmsspi, Opt_sec_ntlmssp,
Jeff Layton76596242012-07-23 20:34:17 -0400235 Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2,
236 Opt_sec_ntlmv2i, Opt_sec_lanman,
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400237 Opt_sec_none,
238
239 Opt_sec_err
240};
241
242static const match_table_t cifs_secflavor_tokens = {
243 { Opt_sec_krb5, "krb5" },
244 { Opt_sec_krb5i, "krb5i" },
245 { Opt_sec_krb5p, "krb5p" },
246 { Opt_sec_ntlmsspi, "ntlmsspi" },
247 { Opt_sec_ntlmssp, "ntlmssp" },
248 { Opt_ntlm, "ntlm" },
249 { Opt_sec_ntlmi, "ntlmi" },
Jeff Layton76596242012-07-23 20:34:17 -0400250 { Opt_sec_ntlmv2, "nontlm" },
251 { Opt_sec_ntlmv2, "ntlmv2" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400252 { Opt_sec_ntlmv2i, "ntlmv2i" },
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400253 { Opt_sec_lanman, "lanman" },
254 { Opt_sec_none, "none" },
255
256 { Opt_sec_err, NULL }
257};
258
Jeff Layton15b6a472012-05-16 07:50:15 -0400259/* cache flavors */
260enum {
261 Opt_cache_loose,
262 Opt_cache_strict,
263 Opt_cache_none,
264 Opt_cache_err
265};
266
267static const match_table_t cifs_cacheflavor_tokens = {
268 { Opt_cache_loose, "loose" },
269 { Opt_cache_strict, "strict" },
270 { Opt_cache_none, "none" },
271 { Opt_cache_err, NULL }
272};
273
Jeff Layton23db65f2012-05-15 12:20:51 -0400274static const match_table_t cifs_smb_version_tokens = {
275 { Smb_1, SMB1_VERSION_STRING },
Steve Frenchdd446b12012-11-28 23:21:06 -0600276 { Smb_20, SMB20_VERSION_STRING},
Steve French1080ef72011-02-24 18:07:19 +0000277 { Smb_21, SMB21_VERSION_STRING },
Steve Frenche4aa25e2012-10-01 12:26:22 -0500278 { Smb_30, SMB30_VERSION_STRING },
Steve French20b6d8b2013-06-12 22:48:41 -0500279 { Smb_302, SMB302_VERSION_STRING },
Jeff Layton23db65f2012-05-15 12:20:51 -0400280};
281
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300282static int ip_connect(struct TCP_Server_Info *server);
283static int generic_ip_connect(struct TCP_Server_Info *server);
Jeff Laytonb647c352010-10-28 11:16:44 -0400284static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
Jeff Layton2de970f2010-10-06 19:51:12 -0400285static void cifs_prune_tlinks(struct work_struct *work);
Jeff Laytonb9bce2e2011-07-06 08:10:39 -0400286static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
287 const char *devname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Jeff Laytond5c56052008-12-01 18:42:33 -0500289/*
290 * cifs tcp session reconnection
291 *
292 * mark tcp session as reconnecting so temporarily locked
293 * mark all smb sessions as reconnecting for tcp session
294 * reconnect tcp session
295 * wake up waiters on reconnection? - (not needed currently)
296 */
Pavel Shilovsky28ea5292012-05-23 16:18:00 +0400297int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298cifs_reconnect(struct TCP_Server_Info *server)
299{
300 int rc = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500301 struct list_head *tmp, *tmp2;
Steve French96daf2b2011-05-27 04:34:02 +0000302 struct cifs_ses *ses;
303 struct cifs_tcon *tcon;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000304 struct mid_q_entry *mid_entry;
Jeff Layton3c1105d2011-05-22 07:09:13 -0400305 struct list_head retry_list;
Steve French50c2f752007-07-13 00:33:32 +0000306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000308 if (server->tcpStatus == CifsExiting) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000309 /* the demux thread will exit normally
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 next time through the loop */
311 spin_unlock(&GlobalMid_Lock);
312 return rc;
313 } else
314 server->tcpStatus = CifsNeedReconnect;
315 spin_unlock(&GlobalMid_Lock);
316 server->maxBuf = 0;
Pavel Shilovskyaa24d1e2011-12-27 16:23:34 +0400317#ifdef CONFIG_CIFS_SMB2
318 server->max_read = 0;
319#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Joe Perchesf96637b2013-05-04 22:12:25 -0500321 cifs_dbg(FYI, "Reconnecting tcp session\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323 /* before reconnecting the tcp session, mark the smb session (uid)
324 and the tid bad so they are not used until reconnected */
Joe Perchesf96637b2013-05-04 22:12:25 -0500325 cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n",
326 __func__);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530327 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -0500328 list_for_each(tmp, &server->smb_ses_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000329 ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
Jeff Layton14fbf502008-11-14 13:53:46 -0500330 ses->need_reconnect = true;
331 ses->ipc_tid = 0;
Jeff Laytonf1987b42008-11-15 11:12:47 -0500332 list_for_each(tmp2, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +0000333 tcon = list_entry(tmp2, struct cifs_tcon, tcon_list);
Jeff Laytonf1987b42008-11-15 11:12:47 -0500334 tcon->need_reconnect = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +0530337 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 /* do not want to be sending data on a socket we are freeing */
Joe Perchesf96637b2013-05-04 22:12:25 -0500340 cifs_dbg(FYI, "%s: tearing down socket\n", __func__);
Jeff Layton72ca5452008-12-01 07:09:36 -0500341 mutex_lock(&server->srv_mutex);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000342 if (server->ssocket) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500343 cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n",
344 server->ssocket->state, server->ssocket->flags);
Trond Myklebust91cf45f2007-11-12 18:10:39 -0800345 kernel_sock_shutdown(server->ssocket, SHUT_WR);
Joe Perchesf96637b2013-05-04 22:12:25 -0500346 cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n",
347 server->ssocket->state, server->ssocket->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 sock_release(server->ssocket);
349 server->ssocket = NULL;
350 }
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -0500351 server->sequence_number = 0;
352 server->session_estab = false;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -0500353 kfree(server->session_key.response);
354 server->session_key.response = NULL;
355 server->session_key.len = 0;
Steve Frenchfda35942011-01-20 18:06:34 +0000356 server->lstrp = jiffies;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500357 mutex_unlock(&server->srv_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500359 /* mark submitted MIDs for retry and issue callback */
Jeff Layton3c1105d2011-05-22 07:09:13 -0400360 INIT_LIST_HEAD(&retry_list);
Joe Perchesf96637b2013-05-04 22:12:25 -0500361 cifs_dbg(FYI, "%s: moving mids to private list\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 spin_lock(&GlobalMid_Lock);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500363 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
364 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400365 if (mid_entry->mid_state == MID_REQUEST_SUBMITTED)
366 mid_entry->mid_state = MID_RETRY_NEEDED;
Jeff Layton3c1105d2011-05-22 07:09:13 -0400367 list_move(&mid_entry->qhead, &retry_list);
368 }
369 spin_unlock(&GlobalMid_Lock);
370
Joe Perchesf96637b2013-05-04 22:12:25 -0500371 cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__);
Jeff Layton3c1105d2011-05-22 07:09:13 -0400372 list_for_each_safe(tmp, tmp2, &retry_list) {
373 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500374 list_del_init(&mid_entry->qhead);
375 mid_entry->callback(mid_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Jeff Layton7fdbaa12011-06-10 16:14:57 -0400378 do {
Steve French6c3d8902006-07-31 22:46:20 +0000379 try_to_freeze();
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300380
381 /* we should try only the port we connected to before */
Jeff Layton73e216a2013-09-05 08:38:10 -0400382 mutex_lock(&server->srv_mutex);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +0300383 rc = generic_ip_connect(server);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000384 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500385 cifs_dbg(FYI, "reconnect error %d\n", rc);
Steve French0cb766a2005-04-28 22:41:11 -0700386 msleep(3000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 } else {
388 atomic_inc(&tcpSesReconnectCount);
389 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000390 if (server->tcpStatus != CifsExiting)
Steve Frenchfd88ce92011-04-12 01:01:14 +0000391 server->tcpStatus = CifsNeedNegotiate;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000392 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 }
Jeff Layton73e216a2013-09-05 08:38:10 -0400394 mutex_unlock(&server->srv_mutex);
Jeff Layton7fdbaa12011-06-10 16:14:57 -0400395 } while (server->tcpStatus == CifsNeedReconnect);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 return rc;
398}
399
Jeff Laytonc74093b2011-01-11 07:24:23 -0500400static void
401cifs_echo_request(struct work_struct *work)
402{
403 int rc;
404 struct TCP_Server_Info *server = container_of(work,
405 struct TCP_Server_Info, echo.work);
406
Jeff Layton247ec9b2011-02-04 17:09:50 -0500407 /*
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400408 * We cannot send an echo if it is disabled or until the
409 * NEGOTIATE_PROTOCOL request is done, which is indicated by
410 * server->ops->need_neg() == true. Also, no need to ping if
411 * we got a response recently.
Jeff Layton247ec9b2011-02-04 17:09:50 -0500412 */
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400413 if (!server->ops->need_neg || server->ops->need_neg(server) ||
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400414 (server->ops->can_echo && !server->ops->can_echo(server)) ||
Jeff Layton247ec9b2011-02-04 17:09:50 -0500415 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
Jeff Laytonc74093b2011-01-11 07:24:23 -0500416 goto requeue_echo;
417
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400418 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
Jeff Laytonc74093b2011-01-11 07:24:23 -0500419 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -0500420 cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
421 server->hostname);
Jeff Laytonc74093b2011-01-11 07:24:23 -0500422
423requeue_echo:
Jeff Laytonda472fc2012-03-23 14:40:53 -0400424 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
Jeff Laytonc74093b2011-01-11 07:24:23 -0500425}
426
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400427static bool
Jeff Layton2a37ef92011-10-19 15:29:23 -0400428allocate_buffers(struct TCP_Server_Info *server)
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400429{
Jeff Layton2a37ef92011-10-19 15:29:23 -0400430 if (!server->bigbuf) {
431 server->bigbuf = (char *)cifs_buf_get();
432 if (!server->bigbuf) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500433 cifs_dbg(VFS, "No memory for large SMB response\n");
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400434 msleep(3000);
435 /* retry will check if exiting */
436 return false;
437 }
Jeff Layton2a37ef92011-10-19 15:29:23 -0400438 } else if (server->large_buf) {
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400439 /* we are reusing a dirty large buf, clear its start */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400440 memset(server->bigbuf, 0, HEADER_SIZE(server));
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400441 }
442
Jeff Layton2a37ef92011-10-19 15:29:23 -0400443 if (!server->smallbuf) {
444 server->smallbuf = (char *)cifs_small_buf_get();
445 if (!server->smallbuf) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500446 cifs_dbg(VFS, "No memory for SMB response\n");
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400447 msleep(1000);
448 /* retry will check if exiting */
449 return false;
450 }
451 /* beginning of smb buffer is cleared in our buf_get */
452 } else {
453 /* if existing small buf clear beginning */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400454 memset(server->smallbuf, 0, HEADER_SIZE(server));
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400455 }
456
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400457 return true;
458}
459
Jeff Laytonba749e62011-10-11 06:41:32 -0400460static bool
461server_unresponsive(struct TCP_Server_Info *server)
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400462{
Pavel Shilovsky6dae51a2012-02-21 16:50:23 +0300463 /*
464 * We need to wait 2 echo intervals to make sure we handle such
465 * situations right:
466 * 1s client sends a normal SMB request
467 * 2s client gets a response
468 * 30s echo workqueue job pops, and decides we got a response recently
469 * and don't need to send another
470 * ...
471 * 65s kernel_recvmsg times out, and we see that we haven't gotten
472 * a response in >60s.
473 */
474 if (server->tcpStatus == CifsGood &&
475 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500476 cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n",
477 server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ);
Jeff Laytonba749e62011-10-11 06:41:32 -0400478 cifs_reconnect(server);
479 wake_up(&server->response_q);
480 return true;
481 }
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400482
Jeff Laytonba749e62011-10-11 06:41:32 -0400483 return false;
484}
485
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400486/*
487 * kvec_array_init - clone a kvec array, and advance into it
488 * @new: pointer to memory for cloned array
489 * @iov: pointer to original array
490 * @nr_segs: number of members in original array
491 * @bytes: number of bytes to advance into the cloned array
492 *
493 * This function will copy the array provided in iov to a section of memory
494 * and advance the specified number of bytes into the new array. It returns
495 * the number of segments in the new array. "new" must be at least as big as
496 * the original iov array.
497 */
498static unsigned int
499kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
500 size_t bytes)
501{
502 size_t base = 0;
503
504 while (bytes || !iov->iov_len) {
505 int copy = min(bytes, iov->iov_len);
506
507 bytes -= copy;
508 base += copy;
509 if (iov->iov_len == base) {
510 iov++;
511 nr_segs--;
512 base = 0;
513 }
514 }
515 memcpy(new, iov, sizeof(*iov) * nr_segs);
516 new->iov_base += base;
517 new->iov_len -= base;
518 return nr_segs;
519}
520
Jeff Layton1041e3f2011-10-19 15:28:27 -0400521static struct kvec *
522get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
523{
524 struct kvec *new_iov;
525
526 if (server->iov && nr_segs <= server->nr_iov)
527 return server->iov;
528
529 /* not big enough -- allocate a new one and release the old */
530 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
531 if (new_iov) {
532 kfree(server->iov);
533 server->iov = new_iov;
534 server->nr_iov = nr_segs;
535 }
536 return new_iov;
537}
538
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400539int
540cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
541 unsigned int nr_segs, unsigned int to_read)
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400542{
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400543 int length = 0;
544 int total_read;
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400545 unsigned int segs;
Jeff Laytone831e6c2011-10-11 06:41:32 -0400546 struct msghdr smb_msg;
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400547 struct kvec *iov;
548
Jeff Layton1041e3f2011-10-19 15:28:27 -0400549 iov = get_server_iovec(server, nr_segs);
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400550 if (!iov)
551 return -ENOMEM;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400552
Jeff Laytone831e6c2011-10-11 06:41:32 -0400553 smb_msg.msg_control = NULL;
554 smb_msg.msg_controllen = 0;
555
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400556 for (total_read = 0; to_read; total_read += length, to_read -= length) {
Jeff Layton95edcff2011-12-01 20:22:41 -0500557 try_to_freeze();
558
Jeff Laytonba749e62011-10-11 06:41:32 -0400559 if (server_unresponsive(server)) {
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400560 total_read = -EAGAIN;
Jeff Laytonba749e62011-10-11 06:41:32 -0400561 break;
562 }
563
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400564 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
565
566 length = kernel_recvmsg(server->ssocket, &smb_msg,
567 iov, segs, to_read, 0);
568
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400569 if (server->tcpStatus == CifsExiting) {
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400570 total_read = -ESHUTDOWN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400571 break;
572 } else if (server->tcpStatus == CifsNeedReconnect) {
573 cifs_reconnect(server);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400574 total_read = -EAGAIN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400575 break;
576 } else if (length == -ERESTARTSYS ||
577 length == -EAGAIN ||
578 length == -EINTR) {
579 /*
580 * Minimum sleep to prevent looping, allowing socket
581 * to clear and app threads to set tcpStatus
582 * CifsNeedReconnect if server hung.
583 */
584 usleep_range(1000, 2000);
585 length = 0;
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400586 continue;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400587 } else if (length <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500588 cifs_dbg(FYI, "Received no data or error: expecting %d\n"
589 "got %d", to_read, length);
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400590 cifs_reconnect(server);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400591 total_read = -EAGAIN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400592 break;
593 }
594 }
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400595 return total_read;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400596}
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400597
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400598int
599cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
600 unsigned int to_read)
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400601{
602 struct kvec iov;
603
604 iov.iov_base = buf;
605 iov.iov_len = to_read;
606
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400607 return cifs_readv_from_socket(server, &iov, 1, to_read);
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400608}
609
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400610static bool
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400611is_smb_response(struct TCP_Server_Info *server, unsigned char type)
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400612{
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400613 /*
614 * The first byte big endian of the length field,
615 * is actually not part of the length but the type
616 * with the most common, zero, as regular data.
617 */
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400618 switch (type) {
619 case RFC1002_SESSION_MESSAGE:
620 /* Regular SMB response */
621 return true;
622 case RFC1002_SESSION_KEEP_ALIVE:
Joe Perchesf96637b2013-05-04 22:12:25 -0500623 cifs_dbg(FYI, "RFC 1002 session keep alive\n");
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400624 break;
625 case RFC1002_POSITIVE_SESSION_RESPONSE:
Joe Perchesf96637b2013-05-04 22:12:25 -0500626 cifs_dbg(FYI, "RFC 1002 positive session response\n");
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400627 break;
628 case RFC1002_NEGATIVE_SESSION_RESPONSE:
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400629 /*
630 * We get this from Windows 98 instead of an error on
631 * SMB negprot response.
632 */
Joe Perchesf96637b2013-05-04 22:12:25 -0500633 cifs_dbg(FYI, "RFC 1002 negative session response\n");
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400634 /* give server a second to clean up */
635 msleep(1000);
636 /*
637 * Always try 445 first on reconnect since we get NACK
638 * on some if we ever connected to port 139 (the NACK
639 * is since we do not begin with RFC1001 session
640 * initialize frame).
641 */
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400642 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400643 cifs_reconnect(server);
644 wake_up(&server->response_q);
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400645 break;
646 default:
Joe Perchesf96637b2013-05-04 22:12:25 -0500647 cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400648 cifs_reconnect(server);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400649 }
650
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400651 return false;
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400652}
653
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400654void
655dequeue_mid(struct mid_q_entry *mid, bool malformed)
Jeff Laytonea1f4502011-10-19 15:29:05 -0400656{
657#ifdef CONFIG_CIFS_STATS2
658 mid->when_received = jiffies;
659#endif
660 spin_lock(&GlobalMid_Lock);
661 if (!malformed)
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400662 mid->mid_state = MID_RESPONSE_RECEIVED;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400663 else
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400664 mid->mid_state = MID_RESPONSE_MALFORMED;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400665 list_del_init(&mid->qhead);
666 spin_unlock(&GlobalMid_Lock);
667}
668
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400669static void
670handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400671 char *buf, int malformed)
Jeff Laytonea1f4502011-10-19 15:29:05 -0400672{
Pavel Shilovsky316cf942012-05-23 14:31:03 +0400673 if (server->ops->check_trans2 &&
674 server->ops->check_trans2(mid, server, buf, malformed))
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400675 return;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400676 mid->resp_buf = buf;
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400677 mid->large_buf = server->large_buf;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400678 /* Was previous buf put in mpx struct for multi-rsp? */
679 if (!mid->multiRsp) {
680 /* smb buffer will be freed by user thread */
681 if (server->large_buf)
682 server->bigbuf = NULL;
683 else
684 server->smallbuf = NULL;
685 }
Jeff Laytonffc00e22011-10-19 15:29:13 -0400686 dequeue_mid(mid, malformed);
Pavel Shilovskyad69bae2011-08-01 13:19:43 +0400687}
688
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400689static void clean_demultiplex_info(struct TCP_Server_Info *server)
690{
691 int length;
692
693 /* take it off the list, if it's not already */
694 spin_lock(&cifs_tcp_ses_lock);
695 list_del_init(&server->tcp_ses_list);
696 spin_unlock(&cifs_tcp_ses_lock);
697
698 spin_lock(&GlobalMid_Lock);
699 server->tcpStatus = CifsExiting;
700 spin_unlock(&GlobalMid_Lock);
701 wake_up_all(&server->response_q);
702
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400703 /* check if we have blocked requests that need to free */
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300704 spin_lock(&server->req_lock);
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400705 if (server->credits <= 0)
706 server->credits = 1;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300707 spin_unlock(&server->req_lock);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400708 /*
709 * Although there should not be any requests blocked on this queue it
710 * can not hurt to be paranoid and try to wake up requests that may
711 * haven been blocked when more than 50 at time were on the wire to the
712 * same server - they now will see the session is in exit state and get
713 * out of SendReceive.
714 */
715 wake_up_all(&server->request_q);
716 /* give those requests time to exit */
717 msleep(125);
718
719 if (server->ssocket) {
720 sock_release(server->ssocket);
721 server->ssocket = NULL;
722 }
723
724 if (!list_empty(&server->pending_mid_q)) {
725 struct list_head dispose_list;
726 struct mid_q_entry *mid_entry;
727 struct list_head *tmp, *tmp2;
728
729 INIT_LIST_HEAD(&dispose_list);
730 spin_lock(&GlobalMid_Lock);
731 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
732 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Joe Perchesf96637b2013-05-04 22:12:25 -0500733 cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid);
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400734 mid_entry->mid_state = MID_SHUTDOWN;
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400735 list_move(&mid_entry->qhead, &dispose_list);
736 }
737 spin_unlock(&GlobalMid_Lock);
738
739 /* now walk dispose list and issue callbacks */
740 list_for_each_safe(tmp, tmp2, &dispose_list) {
741 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Joe Perchesf96637b2013-05-04 22:12:25 -0500742 cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400743 list_del_init(&mid_entry->qhead);
744 mid_entry->callback(mid_entry);
745 }
746 /* 1/8th of sec is more than enough time for them to exit */
747 msleep(125);
748 }
749
750 if (!list_empty(&server->pending_mid_q)) {
751 /*
752 * mpx threads have not exited yet give them at least the smb
753 * send timeout time for long ops.
754 *
755 * Due to delays on oplock break requests, we need to wait at
756 * least 45 seconds before giving up on a request getting a
757 * response and going ahead and killing cifsd.
758 */
Joe Perchesf96637b2013-05-04 22:12:25 -0500759 cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400760 msleep(46000);
761 /*
762 * If threads still have not exited they are probably never
763 * coming home not much else we can do but free the memory.
764 */
765 }
766
767 kfree(server->hostname);
Jeff Layton1041e3f2011-10-19 15:28:27 -0400768 kfree(server->iov);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400769 kfree(server);
770
771 length = atomic_dec_return(&tcpSesAllocCount);
772 if (length > 0)
773 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
774 GFP_KERNEL);
775}
776
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400777static int
Jeff Laytone9097ab2011-10-19 15:29:40 -0400778standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
779{
780 int length;
781 char *buf = server->smallbuf;
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400782 unsigned int pdu_length = get_rfc1002_length(buf);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400783
784 /* make sure this will fit in a large buffer */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400785 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500786 cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400787 cifs_reconnect(server);
788 wake_up(&server->response_q);
789 return -EAGAIN;
790 }
791
792 /* switch to large buffer if too big for a small one */
793 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
794 server->large_buf = true;
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400795 memcpy(server->bigbuf, buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400796 buf = server->bigbuf;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400797 }
798
799 /* now read the rest */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400800 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
801 pdu_length - HEADER_SIZE(server) + 1 + 4);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400802 if (length < 0)
803 return length;
804 server->total_read += length;
805
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400806 dump_smb(buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400807
808 /*
809 * We know that we received enough to get to the MID as we
810 * checked the pdu_length earlier. Now check to see
811 * if the rest of the header is OK. We borrow the length
812 * var for the rest of the loop to avoid a new stack var.
813 *
814 * 48 bytes is enough to display the header and a little bit
815 * into the payload for debugging purposes.
816 */
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400817 length = server->ops->check_message(buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400818 if (length != 0)
819 cifs_dump_mem("Bad SMB: ", buf,
820 min_t(unsigned int, server->total_read, 48));
821
Pavel Shilovsky2e44b282012-09-18 16:20:33 -0700822 if (server->ops->is_status_pending &&
823 server->ops->is_status_pending(buf, server, length))
824 return -1;
825
Jeff Laytonff4fa4a2012-02-07 06:31:05 -0500826 if (!mid)
827 return length;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400828
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400829 handle_mid(mid, server, buf, length);
Jeff Laytonff4fa4a2012-02-07 06:31:05 -0500830 return 0;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400831}
832
833static int
Al Viro7c97c202011-06-21 08:51:28 -0400834cifs_demultiplex_thread(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835{
836 int length;
Al Viro7c97c202011-06-21 08:51:28 -0400837 struct TCP_Server_Info *server = p;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400838 unsigned int pdu_length;
839 char *buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 struct task_struct *task_to_wake = NULL;
841 struct mid_q_entry *mid_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 current->flags |= PF_MEMALLOC;
Joe Perchesf96637b2013-05-04 22:12:25 -0500844 cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
Jeff Layton93d0ec82008-08-02 08:00:48 -0400845
846 length = atomic_inc_return(&tcpSesAllocCount);
847 if (length > 1)
Steve French26f57362007-08-30 22:09:15 +0000848 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
849 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700851 set_freezable();
Jeff Layton469ee612008-10-16 18:46:39 +0000852 while (server->tcpStatus != CifsExiting) {
Steve Frenchede13272005-08-30 20:10:14 -0700853 if (try_to_freeze())
854 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700855
Jeff Layton2a37ef92011-10-19 15:29:23 -0400856 if (!allocate_buffers(server))
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400857 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700858
Jeff Layton2a37ef92011-10-19 15:29:23 -0400859 server->large_buf = false;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400860 buf = server->smallbuf;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000861 pdu_length = 4; /* enough to get RFC1001 header */
Steve Frenchfda35942011-01-20 18:06:34 +0000862
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400863 length = cifs_read_from_socket(server, buf, pdu_length);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400864 if (length < 0)
Steve Frenchfda35942011-01-20 18:06:34 +0000865 continue;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400866 server->total_read = length;
Steve French67010fb2005-04-28 22:41:09 -0700867
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400868 /*
869 * The right amount was read from socket - 4 bytes,
870 * so we can now interpret the length field.
871 */
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400872 pdu_length = get_rfc1002_length(buf);
Steve French46810cb2005-04-28 22:41:09 -0700873
Joe Perchesf96637b2013-05-04 22:12:25 -0500874 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400875 if (!is_smb_response(server, buf[0]))
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000876 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700877
Jeff Layton89482a52011-10-19 15:28:57 -0400878 /* make sure we have enough to get to the MID */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400879 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500880 cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
881 pdu_length);
Jeff Layton89482a52011-10-19 15:28:57 -0400882 cifs_reconnect(server);
883 wake_up(&server->response_q);
884 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700885 }
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400886
Jeff Layton89482a52011-10-19 15:28:57 -0400887 /* read down to the MID */
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400888 length = cifs_read_from_socket(server, buf + 4,
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400889 HEADER_SIZE(server) - 1 - 4);
Jeff Layton89482a52011-10-19 15:28:57 -0400890 if (length < 0)
891 continue;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400892 server->total_read += length;
Jeff Layton89482a52011-10-19 15:28:57 -0400893
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400894 mid_entry = server->ops->find_mid(server, buf);
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400895
Jeff Layton44d22d82011-10-19 15:29:49 -0400896 if (!mid_entry || !mid_entry->receive)
897 length = standard_receive3(server, mid_entry);
898 else
899 length = mid_entry->receive(server, mid_entry);
900
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400901 if (length < 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700902 continue;
903
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400904 if (server->large_buf)
Jeff Laytone9097ab2011-10-19 15:29:40 -0400905 buf = server->bigbuf;
Steve Frenche4eb2952005-04-28 22:41:09 -0700906
Steve Frenchfda35942011-01-20 18:06:34 +0000907 server->lstrp = jiffies;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500908 if (mid_entry != NULL) {
Jeff Layton2a37ef92011-10-19 15:29:23 -0400909 if (!mid_entry->multiRsp || mid_entry->multiEnd)
910 mid_entry->callback(mid_entry);
Pavel Shilovsky7f0adb52012-05-28 15:50:10 +0400911 } else if (!server->ops->is_oplock_break ||
912 !server->ops->is_oplock_break(buf, server)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500913 cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
914 atomic_read(&midCount));
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400915 cifs_dump_mem("Received Data is: ", buf,
916 HEADER_SIZE(server));
Steve French39798772006-05-31 22:40:51 +0000917#ifdef CONFIG_CIFS_DEBUG2
Pavel Shilovsky7f0adb52012-05-28 15:50:10 +0400918 if (server->ops->dump_detail)
919 server->ops->dump_detail(buf);
Steve French39798772006-05-31 22:40:51 +0000920 cifs_dump_mids(server);
921#endif /* CIFS_DEBUG2 */
Steve French50c2f752007-07-13 00:33:32 +0000922
Steve Frenche4eb2952005-04-28 22:41:09 -0700923 }
924 } /* end while !EXITING */
925
Justin P. Mattockfd62cb72011-02-24 22:15:02 -0800926 /* buffer usually freed in free_mid - need to free it here on exit */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400927 cifs_buf_release(server->bigbuf);
928 if (server->smallbuf) /* no sense logging a debug message if NULL */
929 cifs_small_buf_release(server->smallbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400931 task_to_wake = xchg(&server->tsk, NULL);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400932 clean_demultiplex_info(server);
Steve French50c2f752007-07-13 00:33:32 +0000933
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400934 /* if server->tsk was NULL then wait for a signal before exiting */
935 if (!task_to_wake) {
936 set_current_state(TASK_INTERRUPTIBLE);
937 while (!signal_pending(current)) {
938 schedule();
939 set_current_state(TASK_INTERRUPTIBLE);
940 }
941 set_current_state(TASK_RUNNING);
942 }
943
Jeff Layton0468a2c2008-12-01 07:09:35 -0500944 module_put_and_exit(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945}
946
Jeff Laytonc359cf32007-11-16 22:22:06 +0000947/* extract the host portion of the UNC string */
948static char *
949extract_hostname(const char *unc)
950{
951 const char *src;
952 char *dst, *delim;
953 unsigned int len;
954
955 /* skip double chars at beginning of string */
956 /* BB: check validity of these bytes? */
957 src = unc + 2;
958
959 /* delimiter between hostname and sharename is always '\\' now */
960 delim = strchr(src, '\\');
961 if (!delim)
962 return ERR_PTR(-EINVAL);
963
964 len = delim - src;
965 dst = kmalloc((len + 1), GFP_KERNEL);
966 if (dst == NULL)
967 return ERR_PTR(-ENOMEM);
968
969 memcpy(dst, src, len);
970 dst[len] = '\0';
971
972 return dst;
973}
974
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400975static int get_option_ul(substring_t args[], unsigned long *option)
976{
977 int rc;
978 char *string;
979
980 string = match_strdup(args);
981 if (string == NULL)
982 return -ENOMEM;
Sachin Prabhubfa890a2012-04-13 14:04:32 +0100983 rc = kstrtoul(string, 0, option);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400984 kfree(string);
985
986 return rc;
987}
988
Eric W. Biederman3da46562013-02-06 01:37:39 -0800989static int get_option_uid(substring_t args[], kuid_t *result)
990{
991 unsigned long value;
992 kuid_t uid;
993 int rc;
994
995 rc = get_option_ul(args, &value);
996 if (rc)
997 return rc;
998
999 uid = make_kuid(current_user_ns(), value);
1000 if (!uid_valid(uid))
1001 return -EINVAL;
1002
1003 *result = uid;
1004 return 0;
1005}
1006
1007static int get_option_gid(substring_t args[], kgid_t *result)
1008{
1009 unsigned long value;
1010 kgid_t gid;
1011 int rc;
1012
1013 rc = get_option_ul(args, &value);
1014 if (rc)
1015 return rc;
1016
1017 gid = make_kgid(current_user_ns(), value);
1018 if (!gid_valid(gid))
1019 return -EINVAL;
1020
1021 *result = gid;
1022 return 0;
1023}
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001024
1025static int cifs_parse_security_flavors(char *value,
1026 struct smb_vol *vol)
1027{
1028
1029 substring_t args[MAX_OPT_ARGS];
1030
Jeff Layton1e3cc572013-06-10 17:12:23 -05001031 /*
1032 * With mount options, the last one should win. Reset any existing
1033 * settings back to default.
1034 */
1035 vol->sectype = Unspecified;
1036 vol->sign = false;
1037
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001038 switch (match_token(value, cifs_secflavor_tokens, args)) {
Jeff Layton3f618222013-06-12 19:52:14 -05001039 case Opt_sec_krb5p:
1040 cifs_dbg(VFS, "sec=krb5p is not supported!\n");
1041 return 1;
1042 case Opt_sec_krb5i:
1043 vol->sign = true;
1044 /* Fallthrough */
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001045 case Opt_sec_krb5:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001046 vol->sectype = Kerberos;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001047 break;
1048 case Opt_sec_ntlmsspi:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001049 vol->sign = true;
Jeff Layton3f618222013-06-12 19:52:14 -05001050 /* Fallthrough */
1051 case Opt_sec_ntlmssp:
1052 vol->sectype = RawNTLMSSP;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001053 break;
1054 case Opt_sec_ntlmi:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001055 vol->sign = true;
Jeff Layton3f618222013-06-12 19:52:14 -05001056 /* Fallthrough */
1057 case Opt_ntlm:
1058 vol->sectype = NTLM;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001059 break;
1060 case Opt_sec_ntlmv2i:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001061 vol->sign = true;
Jeff Layton3f618222013-06-12 19:52:14 -05001062 /* Fallthrough */
1063 case Opt_sec_ntlmv2:
1064 vol->sectype = NTLMv2;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001065 break;
1066#ifdef CONFIG_CIFS_WEAK_PW_HASH
1067 case Opt_sec_lanman:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001068 vol->sectype = LANMAN;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001069 break;
1070#endif
1071 case Opt_sec_none:
1072 vol->nullauth = 1;
1073 break;
1074 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001075 cifs_dbg(VFS, "bad security option: %s\n", value);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001076 return 1;
1077 }
1078
1079 return 0;
1080}
1081
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082static int
Jeff Layton15b6a472012-05-16 07:50:15 -04001083cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1084{
1085 substring_t args[MAX_OPT_ARGS];
1086
1087 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1088 case Opt_cache_loose:
1089 vol->direct_io = false;
1090 vol->strict_io = false;
1091 break;
1092 case Opt_cache_strict:
1093 vol->direct_io = false;
1094 vol->strict_io = true;
1095 break;
1096 case Opt_cache_none:
1097 vol->direct_io = true;
1098 vol->strict_io = false;
1099 break;
1100 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001101 cifs_dbg(VFS, "bad cache= option: %s\n", value);
Jeff Layton15b6a472012-05-16 07:50:15 -04001102 return 1;
1103 }
1104 return 0;
1105}
1106
1107static int
Jeff Layton23db65f2012-05-15 12:20:51 -04001108cifs_parse_smb_version(char *value, struct smb_vol *vol)
1109{
1110 substring_t args[MAX_OPT_ARGS];
1111
1112 switch (match_token(value, cifs_smb_version_tokens, args)) {
1113 case Smb_1:
1114 vol->ops = &smb1_operations;
1115 vol->vals = &smb1_values;
1116 break;
Steve French1080ef72011-02-24 18:07:19 +00001117#ifdef CONFIG_CIFS_SMB2
Steve Frenchdd446b12012-11-28 23:21:06 -06001118 case Smb_20:
Pavel Shilovsky53ef1012013-09-05 16:11:28 +04001119 vol->ops = &smb20_operations;
Steve Frenchdd446b12012-11-28 23:21:06 -06001120 vol->vals = &smb20_values;
1121 break;
Steve French1080ef72011-02-24 18:07:19 +00001122 case Smb_21:
1123 vol->ops = &smb21_operations;
1124 vol->vals = &smb21_values;
1125 break;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001126 case Smb_30:
Steve French38107d42012-12-08 22:08:06 -06001127 vol->ops = &smb30_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001128 vol->vals = &smb30_values;
1129 break;
Steve French20b6d8b2013-06-12 22:48:41 -05001130 case Smb_302:
1131 vol->ops = &smb30_operations; /* currently identical with 3.0 */
1132 vol->vals = &smb302_values;
1133 break;
Steve French1080ef72011-02-24 18:07:19 +00001134#endif
Jeff Layton23db65f2012-05-15 12:20:51 -04001135 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001136 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
Jeff Layton23db65f2012-05-15 12:20:51 -04001137 return 1;
1138 }
1139 return 0;
1140}
1141
Jeff Laytond387a5c2012-12-10 06:10:46 -05001142/*
1143 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1144 * fields with the result. Returns 0 on success and an error otherwise.
1145 */
1146static int
1147cifs_parse_devname(const char *devname, struct smb_vol *vol)
1148{
1149 char *pos;
1150 const char *delims = "/\\";
1151 size_t len;
1152
1153 /* make sure we have a valid UNC double delimiter prefix */
1154 len = strspn(devname, delims);
1155 if (len != 2)
1156 return -EINVAL;
1157
1158 /* find delimiter between host and sharename */
1159 pos = strpbrk(devname + 2, delims);
1160 if (!pos)
1161 return -EINVAL;
1162
1163 /* skip past delimiter */
1164 ++pos;
1165
1166 /* now go until next delimiter or end of string */
1167 len = strcspn(pos, delims);
1168
1169 /* move "pos" up to delimiter or NULL */
1170 pos += len;
1171 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1172 if (!vol->UNC)
1173 return -ENOMEM;
1174
1175 convert_delimiter(vol->UNC, '\\');
1176
1177 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1178 if (!*pos++ || !*pos)
1179 return 0;
1180
1181 vol->prepath = kstrdup(pos, GFP_KERNEL);
1182 if (!vol->prepath)
1183 return -ENOMEM;
1184
1185 return 0;
1186}
1187
Jeff Layton23db65f2012-05-15 12:20:51 -04001188static int
Sean Finneyb9468452011-04-11 13:19:32 +00001189cifs_parse_mount_options(const char *mountdata, const char *devname,
Steve French50c2f752007-07-13 00:33:32 +00001190 struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191{
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001192 char *data, *end;
Vasily Averin957df452011-06-06 11:33:12 +04001193 char *mountdata_copy = NULL, *options;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 unsigned int temp_len, i, j;
1195 char separator[2];
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001196 short int override_uid = -1;
1197 short int override_gid = -1;
1198 bool uid_specified = false;
1199 bool gid_specified = false;
Jeff Laytond8162552012-03-23 14:40:56 -04001200 bool sloppy = false;
1201 char *invalid = NULL;
Jeff Layton88463992010-11-22 15:31:03 -05001202 char *nodename = utsname()->nodename;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001203 char *string = NULL;
1204 char *tmp_end, *value;
1205 char delim;
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001206 bool got_ip = false;
1207 unsigned short port = 0;
1208 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001209
1210 separator[0] = ',';
Steve French50c2f752007-07-13 00:33:32 +00001211 separator[1] = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001212 delim = separator[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
Jeff Layton6ee95422012-11-26 11:09:57 -05001214 /* ensure we always start with zeroed-out smb_vol */
1215 memset(vol, 0, sizeof(*vol));
1216
Jeff Layton88463992010-11-22 15:31:03 -05001217 /*
1218 * does not have to be perfect mapping since field is
1219 * informational, only used for servers that do not support
1220 * port 445 and it can be overridden at mount time
1221 */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001222 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1223 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
Jeff Layton88463992010-11-22 15:31:03 -05001224 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1225
Jeff Layton1397f2e2011-01-07 11:30:28 -05001226 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
Steve Frencha10faeb22005-08-22 21:38:31 -07001227 /* null target name indicates to use *SMBSERVR default called name
1228 if we end up sending RFC1001 session initialize */
1229 vol->target_rfc1001_name[0] = 0;
Jeff Layton3e4b3e12010-07-19 18:00:17 -04001230 vol->cred_uid = current_uid();
1231 vol->linux_uid = current_uid();
David Howellsa001e5b2008-11-14 10:38:47 +11001232 vol->linux_gid = current_gid();
Jeff Laytonf55ed1a2009-05-26 16:28:11 -04001233
1234 /* default to only allowing write access to owner of the mount */
1235 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236
1237 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
Jeremy Allisonac670552005-06-22 17:26:35 -07001238 /* default is always to request posix paths. */
1239 vol->posix_paths = 1;
Jeff Laytona0c92172009-05-27 15:40:47 -04001240 /* default to using server inode numbers where available */
1241 vol->server_ino = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -07001242
Jeff Layton1b359202012-09-19 15:20:27 -07001243 /* default is to use strict cifs caching semantics */
1244 vol->strict_io = true;
1245
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05301246 vol->actimeo = CIFS_DEF_ACTIMEO;
1247
Jeff Layton23db65f2012-05-15 12:20:51 -04001248 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1249 vol->ops = &smb1_operations;
1250 vol->vals = &smb1_values;
1251
Sean Finneyb9468452011-04-11 13:19:32 +00001252 if (!mountdata)
1253 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
Sean Finneyb9468452011-04-11 13:19:32 +00001255 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1256 if (!mountdata_copy)
1257 goto cifs_parse_mount_err;
1258
1259 options = mountdata_copy;
Pavel Shilovsky4906e502011-04-14 22:00:56 +04001260 end = options + strlen(options);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001261
Steve French50c2f752007-07-13 00:33:32 +00001262 if (strncmp(options, "sep=", 4) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001263 if (options[4] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264 separator[0] = options[4];
1265 options += 5;
1266 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -05001267 cifs_dbg(FYI, "Null separator not allowed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 }
1269 }
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001270 vol->backupuid_specified = false; /* no backup intent for a user */
1271 vol->backupgid_specified = false; /* no backup intent for a group */
Steve French50c2f752007-07-13 00:33:32 +00001272
Jeff Layton37d4f992013-05-24 07:40:05 -04001273 switch (cifs_parse_devname(devname, vol)) {
1274 case 0:
1275 break;
1276 case -ENOMEM:
1277 cifs_dbg(VFS, "Unable to allocate memory for devname.\n");
1278 goto cifs_parse_mount_err;
1279 case -EINVAL:
1280 cifs_dbg(VFS, "Malformed UNC in devname.\n");
1281 goto cifs_parse_mount_err;
1282 default:
1283 cifs_dbg(VFS, "Unknown error parsing devname.\n");
1284 goto cifs_parse_mount_err;
Jeff Laytond387a5c2012-12-10 06:10:46 -05001285 }
1286
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 while ((data = strsep(&options, separator)) != NULL) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001288 substring_t args[MAX_OPT_ARGS];
1289 unsigned long option;
1290 int token;
1291
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 if (!*data)
1293 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001295 token = match_token(data, cifs_mount_option_tokens, args);
1296
1297 switch (token) {
1298
1299 /* Ingnore the following */
1300 case Opt_ignore:
1301 break;
1302
1303 /* Boolean values */
1304 case Opt_user_xattr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 vol->no_xattr = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001306 break;
1307 case Opt_nouser_xattr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 vol->no_xattr = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001309 break;
1310 case Opt_forceuid:
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001311 override_uid = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001312 break;
1313 case Opt_noforceuid:
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001314 override_uid = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001315 break;
Jeff Layton72bd4812012-10-03 16:02:36 -04001316 case Opt_forcegid:
1317 override_gid = 1;
1318 break;
1319 case Opt_noforcegid:
1320 override_gid = 0;
1321 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001322 case Opt_noblocksend:
Steve Frenchedf1ae42008-10-29 00:47:57 +00001323 vol->noblocksnd = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001324 break;
1325 case Opt_noautotune:
Steve Frenchedf1ae42008-10-29 00:47:57 +00001326 vol->noautotune = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001327 break;
1328 case Opt_hard:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 vol->retry = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001330 break;
1331 case Opt_soft:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 vol->retry = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001333 break;
1334 case Opt_perm:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 vol->noperm = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001336 break;
1337 case Opt_noperm:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 vol->noperm = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001339 break;
1340 case Opt_mapchars:
Steve French6a0b4822005-04-28 22:41:05 -07001341 vol->remap = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001342 break;
1343 case Opt_nomapchars:
Steve French6a0b4822005-04-28 22:41:05 -07001344 vol->remap = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001345 break;
1346 case Opt_sfu:
Steve French50c2f752007-07-13 00:33:32 +00001347 vol->sfu_emul = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001348 break;
1349 case Opt_nosfu:
Steve French50c2f752007-07-13 00:33:32 +00001350 vol->sfu_emul = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001351 break;
1352 case Opt_nodfs:
Steve French2c1b8612008-10-16 18:35:21 +00001353 vol->nodfs = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001354 break;
1355 case Opt_posixpaths:
Jeremy Allisonac670552005-06-22 17:26:35 -07001356 vol->posix_paths = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001357 break;
1358 case Opt_noposixpaths:
Jeremy Allisonac670552005-06-22 17:26:35 -07001359 vol->posix_paths = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001360 break;
1361 case Opt_nounix:
Steve Frenchc18c8422007-07-18 23:21:09 +00001362 vol->no_linux_ext = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001363 break;
1364 case Opt_nocase:
Steve French50c2f752007-07-13 00:33:32 +00001365 vol->nocase = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001366 break;
1367 case Opt_brl:
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001368 vol->nobrl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001369 break;
1370 case Opt_nobrl:
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001371 vol->nobrl = 1;
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +04001372 /*
1373 * turn off mandatory locking in mode
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001374 * if remote locking is turned off since the
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +04001375 * local vfs will do advisory
1376 */
Steve French50c2f752007-07-13 00:33:32 +00001377 if (vol->file_mode ==
1378 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
Steve Frenchd3485d32005-08-19 11:04:29 -07001379 vol->file_mode = S_IALLUGO;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001380 break;
1381 case Opt_forcemandatorylock:
Steve French13a6e422008-12-02 17:24:33 +00001382 vol->mand_lock = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001383 break;
1384 case Opt_setuids:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 vol->setuids = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001386 break;
1387 case Opt_nosetuids:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001388 vol->setuids = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001389 break;
1390 case Opt_dynperm:
Jeff Laytond0a9c072008-05-12 22:23:49 +00001391 vol->dynperm = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001392 break;
1393 case Opt_nodynperm:
Jeff Laytond0a9c072008-05-12 22:23:49 +00001394 vol->dynperm = false;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001395 break;
1396 case Opt_nohard:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 vol->retry = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001398 break;
1399 case Opt_nosoft:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400 vol->retry = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001401 break;
1402 case Opt_nointr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403 vol->intr = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001404 break;
1405 case Opt_intr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 vol->intr = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001407 break;
1408 case Opt_nostrictsync:
Steve Frenchbe652442009-02-23 15:21:59 +00001409 vol->nostrictsync = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001410 break;
1411 case Opt_strictsync:
Steve Frenchbe652442009-02-23 15:21:59 +00001412 vol->nostrictsync = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001413 break;
1414 case Opt_serverino:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 vol->server_ino = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001416 break;
1417 case Opt_noserverino:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 vol->server_ino = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001419 break;
1420 case Opt_rwpidforward:
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00001421 vol->rwpidforward = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001422 break;
1423 case Opt_cifsacl:
Steve French0a4b92c2006-01-12 15:44:21 -08001424 vol->cifs_acl = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001425 break;
1426 case Opt_nocifsacl:
Steve French0a4b92c2006-01-12 15:44:21 -08001427 vol->cifs_acl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001428 break;
1429 case Opt_acl:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 vol->no_psx_acl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001431 break;
1432 case Opt_noacl:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433 vol->no_psx_acl = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001434 break;
1435 case Opt_locallease:
Steve French84210e92008-10-23 04:42:37 +00001436 vol->local_lease = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001437 break;
1438 case Opt_sign:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001439 vol->sign = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001440 break;
1441 case Opt_seal:
Steve French95b1cb92008-05-15 16:44:38 +00001442 /* we do not do the following in secFlags because seal
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001443 * is a per tree connection (mount) not a per socket
1444 * or per-smb connection option in the protocol
1445 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1446 */
Steve French95b1cb92008-05-15 16:44:38 +00001447 vol->seal = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001448 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001449 case Opt_noac:
Steve French50c2f752007-07-13 00:33:32 +00001450 printk(KERN_WARNING "CIFS: Mount option noac not "
1451 "supported. Instead set "
1452 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001453 break;
1454 case Opt_fsc:
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301455#ifndef CONFIG_CIFS_FSCACHE
Joe Perchesf96637b2013-05-04 22:12:25 -05001456 cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001457 goto cifs_parse_mount_err;
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301458#endif
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05301459 vol->fsc = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001460 break;
1461 case Opt_mfsymlinks:
Stefan Metzmacher736a3322010-07-30 14:56:00 +02001462 vol->mfsymlinks = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001463 break;
1464 case Opt_multiuser:
Jeff Layton0eb8a132010-10-06 19:51:12 -04001465 vol->multiuser = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001466 break;
Jeff Laytond8162552012-03-23 14:40:56 -04001467 case Opt_sloppy:
1468 sloppy = true;
1469 break;
Jeff Laytona0b3df52013-05-24 07:40:59 -04001470 case Opt_nosharesock:
1471 vol->nosharesock = true;
1472 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001473
1474 /* Numeric Values */
1475 case Opt_backupuid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001476 if (get_option_uid(args, &vol->backupuid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001477 cifs_dbg(VFS, "%s: Invalid backupuid value\n",
1478 __func__);
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001479 goto cifs_parse_mount_err;
1480 }
1481 vol->backupuid_specified = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001482 break;
1483 case Opt_backupgid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001484 if (get_option_gid(args, &vol->backupgid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001485 cifs_dbg(VFS, "%s: Invalid backupgid value\n",
1486 __func__);
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001487 goto cifs_parse_mount_err;
1488 }
1489 vol->backupgid_specified = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001490 break;
1491 case Opt_uid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001492 if (get_option_uid(args, &vol->linux_uid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001493 cifs_dbg(VFS, "%s: Invalid uid value\n",
1494 __func__);
Sean Finneyb9468452011-04-11 13:19:32 +00001495 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001497 uid_specified = true;
1498 break;
1499 case Opt_cruid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001500 if (get_option_uid(args, &vol->cred_uid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001501 cifs_dbg(VFS, "%s: Invalid cruid value\n",
1502 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001503 goto cifs_parse_mount_err;
1504 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001505 break;
1506 case Opt_gid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001507 if (get_option_gid(args, &vol->linux_gid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001508 cifs_dbg(VFS, "%s: Invalid gid value\n",
1509 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001510 goto cifs_parse_mount_err;
1511 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001512 gid_specified = true;
1513 break;
1514 case Opt_file_mode:
1515 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001516 cifs_dbg(VFS, "%s: Invalid file_mode value\n",
1517 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001518 goto cifs_parse_mount_err;
1519 }
1520 vol->file_mode = option;
1521 break;
1522 case Opt_dirmode:
1523 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001524 cifs_dbg(VFS, "%s: Invalid dir_mode value\n",
1525 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001526 goto cifs_parse_mount_err;
1527 }
1528 vol->dir_mode = option;
1529 break;
1530 case Opt_port:
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001531 if (get_option_ul(args, &option) ||
1532 option > USHRT_MAX) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001533 cifs_dbg(VFS, "%s: Invalid port value\n",
1534 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001535 goto cifs_parse_mount_err;
1536 }
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001537 port = (unsigned short)option;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001538 break;
1539 case Opt_rsize:
1540 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001541 cifs_dbg(VFS, "%s: Invalid rsize value\n",
1542 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001543 goto cifs_parse_mount_err;
1544 }
1545 vol->rsize = option;
1546 break;
1547 case Opt_wsize:
1548 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001549 cifs_dbg(VFS, "%s: Invalid wsize value\n",
1550 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001551 goto cifs_parse_mount_err;
1552 }
1553 vol->wsize = option;
1554 break;
1555 case Opt_actimeo:
1556 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001557 cifs_dbg(VFS, "%s: Invalid actimeo value\n",
1558 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001559 goto cifs_parse_mount_err;
1560 }
1561 vol->actimeo = HZ * option;
1562 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001563 cifs_dbg(VFS, "attribute cache timeout too large\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001564 goto cifs_parse_mount_err;
1565 }
1566 break;
1567
1568 /* String Arguments */
1569
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001570 case Opt_blank_user:
1571 /* null user, ie. anonymous authentication */
1572 vol->nullauth = 1;
1573 vol->username = NULL;
1574 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001575 case Opt_user:
1576 string = match_strdup(args);
1577 if (string == NULL)
1578 goto out_nomem;
1579
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04001580 if (strnlen(string, CIFS_MAX_USERNAME_LEN) >
1581 CIFS_MAX_USERNAME_LEN) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001582 printk(KERN_WARNING "CIFS: username too long\n");
1583 goto cifs_parse_mount_err;
1584 }
1585 vol->username = kstrdup(string, GFP_KERNEL);
Joe Perchesf96637b2013-05-04 22:12:25 -05001586 if (!vol->username)
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001587 goto cifs_parse_mount_err;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001588 break;
1589 case Opt_blank_pass:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001590 /* passwords have to be handled differently
1591 * to allow the character used for deliminator
1592 * to be passed within them
1593 */
1594
Sachin Prabhuc369c9a2013-04-09 18:17:41 +01001595 /*
1596 * Check if this is a case where the password
1597 * starts with a delimiter
1598 */
1599 tmp_end = strchr(data, '=');
1600 tmp_end++;
1601 if (!(tmp_end < end && tmp_end[1] == delim)) {
1602 /* No it is not. Set the password to NULL */
1603 vol->password = NULL;
1604 break;
1605 }
1606 /* Yes it is. Drop down to Opt_pass below.*/
1607 case Opt_pass:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001608 /* Obtain the value string */
1609 value = strchr(data, '=');
Sachin Prabhu10238072012-03-28 18:07:08 +01001610 value++;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001611
1612 /* Set tmp_end to end of the string */
1613 tmp_end = (char *) value + strlen(value);
1614
1615 /* Check if following character is the deliminator
1616 * If yes, we have encountered a double deliminator
1617 * reset the NULL character to the deliminator
1618 */
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301619 if (tmp_end < end && tmp_end[1] == delim) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001620 tmp_end[0] = delim;
1621
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301622 /* Keep iterating until we get to a single
1623 * deliminator OR the end
1624 */
1625 while ((tmp_end = strchr(tmp_end, delim))
1626 != NULL && (tmp_end[1] == delim)) {
1627 tmp_end = (char *) &tmp_end[2];
1628 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001629
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301630 /* Reset var options to point to next element */
1631 if (tmp_end) {
1632 tmp_end[0] = '\0';
1633 options = (char *) &tmp_end[1];
1634 } else
1635 /* Reached the end of the mount option
1636 * string */
1637 options = end;
1638 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001639
1640 /* Now build new password string */
1641 temp_len = strlen(value);
1642 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1643 if (vol->password == NULL) {
1644 printk(KERN_WARNING "CIFS: no memory "
1645 "for password\n");
1646 goto cifs_parse_mount_err;
1647 }
1648
1649 for (i = 0, j = 0; i < temp_len; i++, j++) {
1650 vol->password[j] = value[i];
1651 if ((value[i] == delim) &&
1652 value[i+1] == delim)
1653 /* skip the second deliminator */
1654 i++;
1655 }
1656 vol->password[j] = '\0';
1657 break;
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001658 case Opt_blank_ip:
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001659 /* FIXME: should this be an error instead? */
1660 got_ip = false;
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001661 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001662 case Opt_ip:
1663 string = match_strdup(args);
1664 if (string == NULL)
1665 goto out_nomem;
1666
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001667 if (!cifs_convert_address(dstaddr, string,
1668 strlen(string))) {
1669 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1670 string);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001671 goto cifs_parse_mount_err;
1672 }
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001673 got_ip = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001674 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001675 case Opt_domain:
1676 string = match_strdup(args);
1677 if (string == NULL)
1678 goto out_nomem;
1679
Chen Gang057d6332013-07-19 09:01:36 +08001680 if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN)
1681 == CIFS_MAX_DOMAINNAME_LEN) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001682 printk(KERN_WARNING "CIFS: domain name too"
1683 " long\n");
1684 goto cifs_parse_mount_err;
1685 }
1686
1687 vol->domainname = kstrdup(string, GFP_KERNEL);
1688 if (!vol->domainname) {
1689 printk(KERN_WARNING "CIFS: no memory "
1690 "for domainname\n");
1691 goto cifs_parse_mount_err;
1692 }
Joe Perchesf96637b2013-05-04 22:12:25 -05001693 cifs_dbg(FYI, "Domain name set\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001694 break;
1695 case Opt_srcaddr:
1696 string = match_strdup(args);
1697 if (string == NULL)
1698 goto out_nomem;
1699
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001700 if (!cifs_convert_address(
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001701 (struct sockaddr *)&vol->srcaddr,
1702 string, strlen(string))) {
1703 printk(KERN_WARNING "CIFS: Could not parse"
1704 " srcaddr: %s\n", string);
1705 goto cifs_parse_mount_err;
1706 }
1707 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001708 case Opt_iocharset:
1709 string = match_strdup(args);
1710 if (string == NULL)
1711 goto out_nomem;
1712
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001713 if (strnlen(string, 1024) >= 65) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001714 printk(KERN_WARNING "CIFS: iocharset name "
1715 "too long.\n");
1716 goto cifs_parse_mount_err;
1717 }
1718
1719 if (strnicmp(string, "default", 7) != 0) {
1720 vol->iocharset = kstrdup(string,
1721 GFP_KERNEL);
1722 if (!vol->iocharset) {
1723 printk(KERN_WARNING "CIFS: no memory"
1724 "for charset\n");
1725 goto cifs_parse_mount_err;
1726 }
1727 }
1728 /* if iocharset not set then load_nls_default
1729 * is used by caller
1730 */
Joe Perchesf96637b2013-05-04 22:12:25 -05001731 cifs_dbg(FYI, "iocharset set to %s\n", string);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001732 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001733 case Opt_netbiosname:
1734 string = match_strdup(args);
1735 if (string == NULL)
1736 goto out_nomem;
1737
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001738 memset(vol->source_rfc1001_name, 0x20,
1739 RFC1001_NAME_LEN);
1740 /*
1741 * FIXME: are there cases in which a comma can
1742 * be valid in workstation netbios name (and
1743 * need special handling)?
1744 */
1745 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1746 /* don't ucase netbiosname for user */
1747 if (string[i] == 0)
1748 break;
1749 vol->source_rfc1001_name[i] = string[i];
1750 }
1751 /* The string has 16th byte zero still from
1752 * set at top of the function
1753 */
1754 if (i == RFC1001_NAME_LEN && string[i] != 0)
1755 printk(KERN_WARNING "CIFS: netbiosname"
1756 " longer than 15 truncated.\n");
1757
1758 break;
1759 case Opt_servern:
1760 /* servernetbiosname specified override *SMBSERVER */
1761 string = match_strdup(args);
1762 if (string == NULL)
1763 goto out_nomem;
1764
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001765 /* last byte, type, is 0x20 for servr type */
1766 memset(vol->target_rfc1001_name, 0x20,
1767 RFC1001_NAME_LEN_WITH_NULL);
1768
1769 /* BB are there cases in which a comma can be
1770 valid in this workstation netbios name
1771 (and need special handling)? */
1772
1773 /* user or mount helper must uppercase the
1774 netbios name */
1775 for (i = 0; i < 15; i++) {
1776 if (string[i] == 0)
1777 break;
1778 vol->target_rfc1001_name[i] = string[i];
1779 }
1780 /* The string has 16th byte zero still from
1781 set at top of the function */
1782 if (i == RFC1001_NAME_LEN && string[i] != 0)
1783 printk(KERN_WARNING "CIFS: server net"
1784 "biosname longer than 15 truncated.\n");
1785 break;
1786 case Opt_ver:
1787 string = match_strdup(args);
1788 if (string == NULL)
1789 goto out_nomem;
1790
Jeff Layton5249af32012-05-15 12:04:03 -04001791 if (strnicmp(string, "1", 1) == 0) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001792 /* This is the default */
1793 break;
1794 }
1795 /* For all other value, error */
1796 printk(KERN_WARNING "CIFS: Invalid version"
1797 " specified\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001798 goto cifs_parse_mount_err;
Jeff Layton23db65f2012-05-15 12:20:51 -04001799 case Opt_vers:
1800 string = match_strdup(args);
1801 if (string == NULL)
1802 goto out_nomem;
1803
1804 if (cifs_parse_smb_version(string, vol) != 0)
1805 goto cifs_parse_mount_err;
1806 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001807 case Opt_sec:
1808 string = match_strdup(args);
1809 if (string == NULL)
1810 goto out_nomem;
1811
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001812 if (cifs_parse_security_flavors(string, vol) != 0)
1813 goto cifs_parse_mount_err;
1814 break;
Jeff Layton15b6a472012-05-16 07:50:15 -04001815 case Opt_cache:
1816 string = match_strdup(args);
1817 if (string == NULL)
1818 goto out_nomem;
1819
1820 if (cifs_parse_cache_flavor(string, vol) != 0)
1821 goto cifs_parse_mount_err;
1822 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001823 default:
Jeff Laytond8162552012-03-23 14:40:56 -04001824 /*
1825 * An option we don't recognize. Save it off for later
1826 * if we haven't already found one
1827 */
1828 if (!invalid)
1829 invalid = data;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001830 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001832 /* Free up any allocated string */
1833 kfree(string);
1834 string = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001836
Jeff Laytond8162552012-03-23 14:40:56 -04001837 if (!sloppy && invalid) {
1838 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1839 goto cifs_parse_mount_err;
1840 }
1841
Jeff Layton8a8798a2012-01-17 16:09:15 -05001842#ifndef CONFIG_KEYS
1843 /* Muliuser mounts require CONFIG_KEYS support */
1844 if (vol->multiuser) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001845 cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001846 goto cifs_parse_mount_err;
Jeff Layton0eb8a132010-10-06 19:51:12 -04001847 }
Jeff Layton8a8798a2012-01-17 16:09:15 -05001848#endif
Jeff Laytone5e69ab2012-11-25 08:00:42 -05001849 if (!vol->UNC) {
Jeff Layton37d4f992013-05-24 07:40:05 -04001850 cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n");
Jeff Laytone5e69ab2012-11-25 08:00:42 -05001851 goto cifs_parse_mount_err;
1852 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001853
Jeff Layton62a1a432012-12-10 06:10:45 -05001854 /* make sure UNC has a share name */
1855 if (!strchr(vol->UNC + 3, '\\')) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001856 cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n");
Jeff Layton62a1a432012-12-10 06:10:45 -05001857 goto cifs_parse_mount_err;
1858 }
1859
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001860 if (!got_ip) {
1861 /* No ip= option specified? Try to get it from UNC */
1862 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1863 strlen(&vol->UNC[2]))) {
1864 printk(KERN_ERR "Unable to determine destination "
1865 "address.\n");
1866 goto cifs_parse_mount_err;
1867 }
1868 }
1869
1870 /* set the port that we got earlier */
1871 cifs_set_port(dstaddr, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001872
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001873 if (uid_specified)
1874 vol->override_uid = override_uid;
1875 else if (override_uid == 1)
1876 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1877 "specified with no uid= option.\n");
1878
1879 if (gid_specified)
1880 vol->override_gid = override_gid;
1881 else if (override_gid == 1)
1882 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1883 "specified with no gid= option.\n");
1884
Sean Finneyb9468452011-04-11 13:19:32 +00001885 kfree(mountdata_copy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 return 0;
Sean Finneyb9468452011-04-11 13:19:32 +00001887
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001888out_nomem:
1889 printk(KERN_WARNING "Could not allocate temporary buffer\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001890cifs_parse_mount_err:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001891 kfree(string);
Sean Finneyb9468452011-04-11 13:19:32 +00001892 kfree(mountdata_copy);
1893 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894}
1895
Ben Greear3eb9a882010-09-01 17:06:02 -07001896/** Returns true if srcaddr isn't specified and rhs isn't
1897 * specified, or if srcaddr is specified and
1898 * matches the IP address of the rhs argument.
1899 */
Jeff Layton45151482010-07-06 20:43:02 -04001900static bool
Ben Greear3eb9a882010-09-01 17:06:02 -07001901srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1902{
1903 switch (srcaddr->sa_family) {
1904 case AF_UNSPEC:
1905 return (rhs->sa_family == AF_UNSPEC);
1906 case AF_INET: {
1907 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1908 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1909 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1910 }
1911 case AF_INET6: {
1912 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
Nickolai Zeldoviche3e27752013-01-16 21:36:17 -05001913 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
Ben Greear3eb9a882010-09-01 17:06:02 -07001914 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1915 }
1916 default:
1917 WARN_ON(1);
1918 return false; /* don't expect to be here */
1919 }
1920}
1921
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001922/*
1923 * If no port is specified in addr structure, we try to match with 445 port
1924 * and if it fails - with 139 ports. It should be called only if address
1925 * families of server and addr are equal.
1926 */
1927static bool
1928match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1929{
Steve French6da97912011-03-13 18:55:55 +00001930 __be16 port, *sport;
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001931
1932 switch (addr->sa_family) {
1933 case AF_INET:
1934 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1935 port = ((struct sockaddr_in *) addr)->sin_port;
1936 break;
1937 case AF_INET6:
1938 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1939 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1940 break;
1941 default:
1942 WARN_ON(1);
1943 return false;
1944 }
1945
1946 if (!port) {
1947 port = htons(CIFS_PORT);
1948 if (port == *sport)
1949 return true;
1950
1951 port = htons(RFC1001_PORT);
1952 }
1953
1954 return port == *sport;
1955}
Ben Greear3eb9a882010-09-01 17:06:02 -07001956
1957static bool
1958match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1959 struct sockaddr *srcaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960{
Jeff Layton45151482010-07-06 20:43:02 -04001961 switch (addr->sa_family) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001962 case AF_INET: {
1963 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1964 struct sockaddr_in *srv_addr4 =
1965 (struct sockaddr_in *)&server->dstaddr;
1966
1967 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
Jeff Layton45151482010-07-06 20:43:02 -04001968 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001969 break;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001970 }
1971 case AF_INET6: {
1972 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1973 struct sockaddr_in6 *srv_addr6 =
1974 (struct sockaddr_in6 *)&server->dstaddr;
1975
Jeff Layton45151482010-07-06 20:43:02 -04001976 if (!ipv6_addr_equal(&addr6->sin6_addr,
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001977 &srv_addr6->sin6_addr))
Jeff Layton45151482010-07-06 20:43:02 -04001978 return false;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001979 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
Jeff Layton45151482010-07-06 20:43:02 -04001980 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001981 break;
1982 }
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001983 default:
1984 WARN_ON(1);
1985 return false; /* don't expect to be here */
1986 }
Jeff Layton45151482010-07-06 20:43:02 -04001987
Ben Greear3eb9a882010-09-01 17:06:02 -07001988 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1989 return false;
1990
Jeff Layton45151482010-07-06 20:43:02 -04001991 return true;
1992}
1993
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001994static bool
1995match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1996{
Jeff Layton3f618222013-06-12 19:52:14 -05001997 /*
1998 * The select_sectype function should either return the vol->sectype
1999 * that was specified, or "Unspecified" if that sectype was not
2000 * compatible with the given NEGOTIATE request.
2001 */
2002 if (select_sectype(server, vol->sectype) == Unspecified)
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002003 return false;
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002004
Jeff Layton3f618222013-06-12 19:52:14 -05002005 /*
2006 * Now check if signing mode is acceptable. No need to check
2007 * global_secflags at this point since if MUST_SIGN is set then
2008 * the server->sign had better be too.
2009 */
Jeff Layton38d77c52013-05-26 07:01:00 -04002010 if (vol->sign && !server->sign)
2011 return false;
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002012
2013 return true;
2014}
2015
Jeff Layton9fa114f2012-11-26 11:09:57 -05002016static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002017{
Jeff Layton9fa114f2012-11-26 11:09:57 -05002018 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2019
Jeff Laytona0b3df52013-05-24 07:40:59 -04002020 if (vol->nosharesock)
2021 return 0;
2022
Jeff Layton23db65f2012-05-15 12:20:51 -04002023 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2024 return 0;
2025
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002026 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2027 return 0;
2028
2029 if (!match_address(server, addr,
2030 (struct sockaddr *)&vol->srcaddr))
2031 return 0;
2032
2033 if (!match_port(server, addr))
2034 return 0;
2035
2036 if (!match_security(server, vol))
2037 return 0;
2038
2039 return 1;
2040}
2041
Jeff Layton45151482010-07-06 20:43:02 -04002042static struct TCP_Server_Info *
Jeff Layton9fa114f2012-11-26 11:09:57 -05002043cifs_find_tcp_session(struct smb_vol *vol)
Jeff Layton45151482010-07-06 20:43:02 -04002044{
Jeff Laytone7ddee92008-11-14 13:44:38 -05002045 struct TCP_Server_Info *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302047 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton45151482010-07-06 20:43:02 -04002048 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
Jeff Layton9fa114f2012-11-26 11:09:57 -05002049 if (!match_server(server, vol))
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002050 continue;
2051
Jeff Laytone7ddee92008-11-14 13:44:38 -05002052 ++server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302053 spin_unlock(&cifs_tcp_ses_lock);
Joe Perchesf96637b2013-05-04 22:12:25 -05002054 cifs_dbg(FYI, "Existing tcp session with server found\n");
Jeff Laytone7ddee92008-11-14 13:44:38 -05002055 return server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302057 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058 return NULL;
2059}
2060
Jeff Layton14fbf502008-11-14 13:53:46 -05002061static void
Jeff Laytone7ddee92008-11-14 13:44:38 -05002062cifs_put_tcp_session(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063{
Jeff Laytone7ddee92008-11-14 13:44:38 -05002064 struct task_struct *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002065
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302066 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002067 if (--server->srv_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302068 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002069 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070 }
Steve Frenchdea570e02008-05-06 22:05:51 +00002071
Rob Landleyf1d0c992011-01-22 15:44:05 -06002072 put_net(cifs_net_ns(server));
2073
Jeff Laytone7ddee92008-11-14 13:44:38 -05002074 list_del_init(&server->tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302075 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002076
Jeff Laytonc74093b2011-01-11 07:24:23 -05002077 cancel_delayed_work_sync(&server->echo);
2078
Jeff Laytone7ddee92008-11-14 13:44:38 -05002079 spin_lock(&GlobalMid_Lock);
2080 server->tcpStatus = CifsExiting;
2081 spin_unlock(&GlobalMid_Lock);
2082
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002083 cifs_crypto_shash_release(server);
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05302084 cifs_fscache_release_client_cookie(server);
2085
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05002086 kfree(server->session_key.response);
2087 server->session_key.response = NULL;
2088 server->session_key.len = 0;
2089
Jeff Laytone7ddee92008-11-14 13:44:38 -05002090 task = xchg(&server->tsk, NULL);
2091 if (task)
2092 force_sig(SIGKILL, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093}
2094
Jeff Layton63c038c2008-12-01 18:41:46 -05002095static struct TCP_Server_Info *
2096cifs_get_tcp_session(struct smb_vol *volume_info)
2097{
2098 struct TCP_Server_Info *tcp_ses = NULL;
Jeff Layton63c038c2008-12-01 18:41:46 -05002099 int rc;
2100
Joe Perchesf96637b2013-05-04 22:12:25 -05002101 cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC);
Jeff Layton63c038c2008-12-01 18:41:46 -05002102
2103 /* see if we already have a matching tcp_ses */
Jeff Layton9fa114f2012-11-26 11:09:57 -05002104 tcp_ses = cifs_find_tcp_session(volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05002105 if (tcp_ses)
2106 return tcp_ses;
2107
2108 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2109 if (!tcp_ses) {
2110 rc = -ENOMEM;
2111 goto out_err;
2112 }
2113
Jeff Layton23db65f2012-05-15 12:20:51 -04002114 tcp_ses->ops = volume_info->ops;
2115 tcp_ses->vals = volume_info->vals;
Rob Landleyf1d0c992011-01-22 15:44:05 -06002116 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
Jeff Layton63c038c2008-12-01 18:41:46 -05002117 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2118 if (IS_ERR(tcp_ses->hostname)) {
2119 rc = PTR_ERR(tcp_ses->hostname);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002120 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002121 }
2122
2123 tcp_ses->noblocksnd = volume_info->noblocksnd;
2124 tcp_ses->noautotune = volume_info->noautotune;
Steve French6a5fa2362010-01-01 01:28:43 +00002125 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +03002126 tcp_ses->in_flight = 0;
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +04002127 tcp_ses->credits = 1;
Jeff Layton63c038c2008-12-01 18:41:46 -05002128 init_waitqueue_head(&tcp_ses->response_q);
2129 init_waitqueue_head(&tcp_ses->request_q);
2130 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2131 mutex_init(&tcp_ses->srv_mutex);
2132 memcpy(tcp_ses->workstation_RFC1001_name,
2133 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2134 memcpy(tcp_ses->server_RFC1001_name,
2135 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05002136 tcp_ses->session_estab = false;
Jeff Layton63c038c2008-12-01 18:41:46 -05002137 tcp_ses->sequence_number = 0;
Steve Frenchfda35942011-01-20 18:06:34 +00002138 tcp_ses->lstrp = jiffies;
Jeff Layton58fa0152012-05-01 17:41:16 -04002139 spin_lock_init(&tcp_ses->req_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002140 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2141 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
Jeff Laytonc74093b2011-01-11 07:24:23 -05002142 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
Jeff Layton9fa114f2012-11-26 11:09:57 -05002143 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2144 sizeof(tcp_ses->srcaddr));
2145 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2146 sizeof(tcp_ses->dstaddr));
Jeff Layton63c038c2008-12-01 18:41:46 -05002147 /*
2148 * at this point we are the only ones with the pointer
2149 * to the struct since the kernel thread not created yet
2150 * no need to spinlock this init of tcpStatus or srv_count
2151 */
2152 tcp_ses->tcpStatus = CifsNew;
2153 ++tcp_ses->srv_count;
2154
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002155 rc = ip_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05002156 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002157 cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002158 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002159 }
2160
2161 /*
2162 * since we're in a cifs function already, we know that
2163 * this will succeed. No need for try_module_get().
2164 */
2165 __module_get(THIS_MODULE);
Al Viro7c97c202011-06-21 08:51:28 -04002166 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
Jeff Layton63c038c2008-12-01 18:41:46 -05002167 tcp_ses, "cifsd");
2168 if (IS_ERR(tcp_ses->tsk)) {
2169 rc = PTR_ERR(tcp_ses->tsk);
Joe Perchesf96637b2013-05-04 22:12:25 -05002170 cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
Jeff Layton63c038c2008-12-01 18:41:46 -05002171 module_put(THIS_MODULE);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002172 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002173 }
Steve Frenchfd88ce92011-04-12 01:01:14 +00002174 tcp_ses->tcpStatus = CifsNeedNegotiate;
Jeff Layton63c038c2008-12-01 18:41:46 -05002175
2176 /* thread spawned, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302177 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002178 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302179 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002180
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05302181 cifs_fscache_get_client_cookie(tcp_ses);
2182
Jeff Laytonc74093b2011-01-11 07:24:23 -05002183 /* queue echo request delayed work */
Jeff Laytonda472fc2012-03-23 14:40:53 -04002184 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
Jeff Laytonc74093b2011-01-11 07:24:23 -05002185
Jeff Layton63c038c2008-12-01 18:41:46 -05002186 return tcp_ses;
2187
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002188out_err_crypto_release:
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002189 cifs_crypto_shash_release(tcp_ses);
2190
Rob Landleyf1d0c992011-01-22 15:44:05 -06002191 put_net(cifs_net_ns(tcp_ses));
2192
Jeff Layton63c038c2008-12-01 18:41:46 -05002193out_err:
2194 if (tcp_ses) {
Steve French8347a5c2009-10-06 18:31:29 +00002195 if (!IS_ERR(tcp_ses->hostname))
2196 kfree(tcp_ses->hostname);
Jeff Layton63c038c2008-12-01 18:41:46 -05002197 if (tcp_ses->ssocket)
2198 sock_release(tcp_ses->ssocket);
2199 kfree(tcp_ses);
2200 }
2201 return ERR_PTR(rc);
2202}
2203
Steve French96daf2b2011-05-27 04:34:02 +00002204static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002205{
Jeff Layton3f618222013-06-12 19:52:14 -05002206 if (vol->sectype != Unspecified &&
2207 vol->sectype != ses->sectype)
2208 return 0;
2209
2210 switch (ses->sectype) {
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002211 case Kerberos:
Eric W. Biederman64ed39d2013-02-06 02:30:39 -08002212 if (!uid_eq(vol->cred_uid, ses->cred_uid))
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002213 return 0;
2214 break;
2215 default:
Jeff Layton04febab2012-01-17 16:09:15 -05002216 /* NULL username means anonymous session */
2217 if (ses->user_name == NULL) {
2218 if (!vol->nullauth)
2219 return 0;
2220 break;
2221 }
2222
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002223 /* anything else takes username/password */
Jeff Layton04febab2012-01-17 16:09:15 -05002224 if (strncmp(ses->user_name,
2225 vol->username ? vol->username : "",
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04002226 CIFS_MAX_USERNAME_LEN))
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002227 return 0;
2228 if (strlen(vol->username) != 0 &&
2229 ses->password != NULL &&
2230 strncmp(ses->password,
2231 vol->password ? vol->password : "",
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04002232 CIFS_MAX_PASSWORD_LEN))
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002233 return 0;
2234 }
2235 return 1;
2236}
2237
Steve French96daf2b2011-05-27 04:34:02 +00002238static struct cifs_ses *
Jeff Layton4ff67b72010-07-06 20:43:02 -04002239cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240{
Steve French96daf2b2011-05-27 04:34:02 +00002241 struct cifs_ses *ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302243 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton4ff67b72010-07-06 20:43:02 -04002244 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002245 if (ses->status == CifsExiting)
2246 continue;
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002247 if (!match_session(ses, vol))
2248 continue;
Jeff Layton14fbf502008-11-14 13:53:46 -05002249 ++ses->ses_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302250 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002251 return ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002252 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302253 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 return NULL;
2255}
2256
Jeff Layton14fbf502008-11-14 13:53:46 -05002257static void
Steve French96daf2b2011-05-27 04:34:02 +00002258cifs_put_smb_ses(struct cifs_ses *ses)
Jeff Layton14fbf502008-11-14 13:53:46 -05002259{
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002260 unsigned int rc, xid;
Jeff Layton14fbf502008-11-14 13:53:46 -05002261 struct TCP_Server_Info *server = ses->server;
2262
Joe Perchesf96637b2013-05-04 22:12:25 -05002263 cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002264
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302265 spin_lock(&cifs_tcp_ses_lock);
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002266 if (ses->status == CifsExiting) {
2267 spin_unlock(&cifs_tcp_ses_lock);
2268 return;
2269 }
Jeff Layton14fbf502008-11-14 13:53:46 -05002270 if (--ses->ses_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302271 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002272 return;
2273 }
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002274 if (ses->status == CifsGood)
2275 ses->status = CifsExiting;
2276 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002277
Shirish Pargaonkar7f485582013-10-12 10:06:03 -05002278 if (ses->status == CifsExiting && server->ops->logoff) {
2279 xid = get_xid();
2280 rc = server->ops->logoff(xid, ses);
2281 if (rc)
2282 cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n",
2283 __func__, rc);
2284 _free_xid(xid);
2285 }
2286
2287 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002288 list_del_init(&ses->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302289 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002290
Jeff Layton14fbf502008-11-14 13:53:46 -05002291 sesInfoFree(ses);
2292 cifs_put_tcp_session(server);
2293}
2294
Jeff Layton8a8798a2012-01-17 16:09:15 -05002295#ifdef CONFIG_KEYS
2296
Chen Gang057d6332013-07-19 09:01:36 +08002297/* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */
2298#define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1)
Jeff Layton8a8798a2012-01-17 16:09:15 -05002299
2300/* Populate username and pw fields from keyring if possible */
2301static int
2302cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2303{
2304 int rc = 0;
2305 char *desc, *delim, *payload;
2306 ssize_t len;
2307 struct key *key;
2308 struct TCP_Server_Info *server = ses->server;
2309 struct sockaddr_in *sa;
2310 struct sockaddr_in6 *sa6;
2311 struct user_key_payload *upayload;
2312
2313 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2314 if (!desc)
2315 return -ENOMEM;
2316
2317 /* try to find an address key first */
2318 switch (server->dstaddr.ss_family) {
2319 case AF_INET:
2320 sa = (struct sockaddr_in *)&server->dstaddr;
2321 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2322 break;
2323 case AF_INET6:
2324 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2325 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2326 break;
2327 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05002328 cifs_dbg(FYI, "Bad ss_family (%hu)\n",
2329 server->dstaddr.ss_family);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002330 rc = -EINVAL;
2331 goto out_err;
2332 }
2333
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 if (!ses->domainName) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002338 cifs_dbg(FYI, "domainName is NULL\n");
Jeff Layton8a8798a2012-01-17 16:09:15 -05002339 rc = PTR_ERR(key);
2340 goto out_err;
2341 }
2342
2343 /* didn't work, try to find a domain key */
2344 sprintf(desc, "cifs:d:%s", ses->domainName);
Joe Perchesf96637b2013-05-04 22:12:25 -05002345 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002346 key = request_key(&key_type_logon, desc, "");
2347 if (IS_ERR(key)) {
2348 rc = PTR_ERR(key);
2349 goto out_err;
2350 }
2351 }
2352
2353 down_read(&key->sem);
2354 upayload = key->payload.data;
2355 if (IS_ERR_OR_NULL(upayload)) {
Jeff Layton4edc53c2012-02-07 06:30:51 -05002356 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
Jeff Layton8a8798a2012-01-17 16:09:15 -05002357 goto out_key_put;
2358 }
2359
2360 /* find first : in payload */
2361 payload = (char *)upayload->data;
2362 delim = strnchr(payload, upayload->datalen, ':');
Joe Perchesf96637b2013-05-04 22:12:25 -05002363 cifs_dbg(FYI, "payload=%s\n", payload);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002364 if (!delim) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002365 cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
2366 upayload->datalen);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002367 rc = -EINVAL;
2368 goto out_key_put;
2369 }
2370
2371 len = delim - payload;
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04002372 if (len > CIFS_MAX_USERNAME_LEN || len <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002373 cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
2374 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002375 rc = -EINVAL;
2376 goto out_key_put;
2377 }
2378
2379 vol->username = kstrndup(payload, len, GFP_KERNEL);
2380 if (!vol->username) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002381 cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
2382 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002383 rc = -ENOMEM;
2384 goto out_key_put;
2385 }
Joe Perchesf96637b2013-05-04 22:12:25 -05002386 cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002387
2388 len = key->datalen - (len + 1);
Scott Lovenberg8c3a2b42013-08-09 08:47:17 -04002389 if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002390 cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002391 rc = -EINVAL;
2392 kfree(vol->username);
2393 vol->username = NULL;
2394 goto out_key_put;
2395 }
2396
2397 ++delim;
2398 vol->password = kstrndup(delim, len, GFP_KERNEL);
2399 if (!vol->password) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002400 cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
2401 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002402 rc = -ENOMEM;
2403 kfree(vol->username);
2404 vol->username = NULL;
2405 goto out_key_put;
2406 }
2407
2408out_key_put:
2409 up_read(&key->sem);
2410 key_put(key);
2411out_err:
2412 kfree(desc);
Joe Perchesf96637b2013-05-04 22:12:25 -05002413 cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002414 return rc;
2415}
2416#else /* ! CONFIG_KEYS */
2417static inline int
2418cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2419 struct cifs_ses *ses __attribute__((unused)))
2420{
2421 return -ENOSYS;
2422}
2423#endif /* CONFIG_KEYS */
2424
Steve French96daf2b2011-05-27 04:34:02 +00002425static struct cifs_ses *
Jeff Layton36988c72010-04-24 07:57:43 -04002426cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2427{
Pavel Shilovsky286170a2012-05-25 10:43:58 +04002428 int rc = -ENOMEM;
2429 unsigned int xid;
Steve French96daf2b2011-05-27 04:34:02 +00002430 struct cifs_ses *ses;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002431 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2432 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
Jeff Layton36988c72010-04-24 07:57:43 -04002433
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002434 xid = get_xid();
Jeff Layton36988c72010-04-24 07:57:43 -04002435
Jeff Layton4ff67b72010-07-06 20:43:02 -04002436 ses = cifs_find_smb_ses(server, volume_info);
Jeff Layton36988c72010-04-24 07:57:43 -04002437 if (ses) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002438 cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
2439 ses->status);
Jeff Layton36988c72010-04-24 07:57:43 -04002440
Jeff Layton36988c72010-04-24 07:57:43 -04002441 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04002442 rc = cifs_negotiate_protocol(xid, ses);
2443 if (rc) {
2444 mutex_unlock(&ses->session_mutex);
2445 /* problem -- put our ses reference */
2446 cifs_put_smb_ses(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002447 free_xid(xid);
Jeff Layton198b5682010-04-24 07:57:48 -04002448 return ERR_PTR(rc);
2449 }
Jeff Layton36988c72010-04-24 07:57:43 -04002450 if (ses->need_reconnect) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002451 cifs_dbg(FYI, "Session needs reconnect\n");
Jeff Layton36988c72010-04-24 07:57:43 -04002452 rc = cifs_setup_session(xid, ses,
2453 volume_info->local_nls);
2454 if (rc) {
2455 mutex_unlock(&ses->session_mutex);
2456 /* problem -- put our reference */
2457 cifs_put_smb_ses(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002458 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002459 return ERR_PTR(rc);
2460 }
2461 }
2462 mutex_unlock(&ses->session_mutex);
Jeff Layton460cf342010-09-14 11:38:24 -04002463
2464 /* existing SMB ses has a server reference already */
2465 cifs_put_tcp_session(server);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002466 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002467 return ses;
2468 }
2469
Joe Perchesf96637b2013-05-04 22:12:25 -05002470 cifs_dbg(FYI, "Existing smb sess not found\n");
Jeff Layton36988c72010-04-24 07:57:43 -04002471 ses = sesInfoAlloc();
2472 if (ses == NULL)
2473 goto get_ses_fail;
2474
2475 /* new SMB session uses our server ref */
2476 ses->server = server;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002477 if (server->dstaddr.ss_family == AF_INET6)
2478 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04002479 else
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002480 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04002481
Steve French8727c8a2011-02-25 01:11:56 -06002482 if (volume_info->username) {
2483 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2484 if (!ses->user_name)
2485 goto get_ses_fail;
2486 }
Jeff Layton36988c72010-04-24 07:57:43 -04002487
2488 /* volume_info->password freed at unmount */
2489 if (volume_info->password) {
2490 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2491 if (!ses->password)
2492 goto get_ses_fail;
2493 }
2494 if (volume_info->domainname) {
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05002495 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2496 if (!ses->domainName)
2497 goto get_ses_fail;
Jeff Layton36988c72010-04-24 07:57:43 -04002498 }
Jeff Layton3e4b3e12010-07-19 18:00:17 -04002499 ses->cred_uid = volume_info->cred_uid;
Jeff Layton36988c72010-04-24 07:57:43 -04002500 ses->linux_uid = volume_info->linux_uid;
Steve Frenchd9b94202011-04-12 01:24:57 +00002501
Jeff Layton28e11bd2013-05-26 07:01:00 -04002502 ses->sectype = volume_info->sectype;
2503 ses->sign = volume_info->sign;
Jeff Layton36988c72010-04-24 07:57:43 -04002504
2505 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04002506 rc = cifs_negotiate_protocol(xid, ses);
2507 if (!rc)
2508 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
Jeff Layton36988c72010-04-24 07:57:43 -04002509 mutex_unlock(&ses->session_mutex);
Steve Frenchc8e56f12010-09-08 21:10:58 +00002510 if (rc)
Jeff Layton36988c72010-04-24 07:57:43 -04002511 goto get_ses_fail;
2512
2513 /* success, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302514 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002515 list_add(&ses->smb_ses_list, &server->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302516 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002517
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002518 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002519 return ses;
2520
2521get_ses_fail:
2522 sesInfoFree(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002523 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002524 return ERR_PTR(rc);
2525}
2526
Steve French96daf2b2011-05-27 04:34:02 +00002527static int match_tcon(struct cifs_tcon *tcon, const char *unc)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002528{
2529 if (tcon->tidStatus == CifsExiting)
2530 return 0;
2531 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2532 return 0;
2533 return 1;
2534}
2535
Steve French96daf2b2011-05-27 04:34:02 +00002536static struct cifs_tcon *
2537cifs_find_tcon(struct cifs_ses *ses, const char *unc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002538{
2539 struct list_head *tmp;
Steve French96daf2b2011-05-27 04:34:02 +00002540 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302542 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002543 list_for_each(tmp, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +00002544 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002545 if (!match_tcon(tcon, unc))
Jeff Laytonf1987b42008-11-15 11:12:47 -05002546 continue;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002547 ++tcon->tc_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302548 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549 return tcon;
2550 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302551 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002552 return NULL;
2553}
2554
Jeff Laytonf1987b42008-11-15 11:12:47 -05002555static void
Steve French96daf2b2011-05-27 04:34:02 +00002556cifs_put_tcon(struct cifs_tcon *tcon)
Jeff Laytonf1987b42008-11-15 11:12:47 -05002557{
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002558 unsigned int xid;
Steve French96daf2b2011-05-27 04:34:02 +00002559 struct cifs_ses *ses = tcon->ses;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002560
Joe Perchesf96637b2013-05-04 22:12:25 -05002561 cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302562 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002563 if (--tcon->tc_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302564 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002565 return;
2566 }
2567
2568 list_del_init(&tcon->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302569 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002570
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002571 xid = get_xid();
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002572 if (ses->server->ops->tree_disconnect)
2573 ses->server->ops->tree_disconnect(xid, tcon);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002574 _free_xid(xid);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002575
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302576 cifs_fscache_release_super_cookie(tcon);
Steve French9f841592010-07-23 20:37:53 +00002577 tconInfoFree(tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002578 cifs_put_smb_ses(ses);
2579}
2580
Steve French96daf2b2011-05-27 04:34:02 +00002581static struct cifs_tcon *
2582cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
Jeff Laytond00c28d2010-04-24 07:57:44 -04002583{
2584 int rc, xid;
Steve French96daf2b2011-05-27 04:34:02 +00002585 struct cifs_tcon *tcon;
Jeff Laytond00c28d2010-04-24 07:57:44 -04002586
2587 tcon = cifs_find_tcon(ses, volume_info->UNC);
2588 if (tcon) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002589 cifs_dbg(FYI, "Found match on UNC path\n");
Jeff Laytond00c28d2010-04-24 07:57:44 -04002590 /* existing tcon already has a reference */
2591 cifs_put_smb_ses(ses);
2592 if (tcon->seal != volume_info->seal)
Joe Perchesf96637b2013-05-04 22:12:25 -05002593 cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
Jeff Laytond00c28d2010-04-24 07:57:44 -04002594 return tcon;
2595 }
2596
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002597 if (!ses->server->ops->tree_connect) {
2598 rc = -ENOSYS;
2599 goto out_fail;
2600 }
2601
Jeff Laytond00c28d2010-04-24 07:57:44 -04002602 tcon = tconInfoAlloc();
2603 if (tcon == NULL) {
2604 rc = -ENOMEM;
2605 goto out_fail;
2606 }
2607
2608 tcon->ses = ses;
2609 if (volume_info->password) {
2610 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2611 if (!tcon->password) {
2612 rc = -ENOMEM;
2613 goto out_fail;
2614 }
2615 }
2616
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002617 /*
2618 * BB Do we need to wrap session_mutex around this TCon call and Unix
2619 * SetFS as we do on SessSetup and reconnect?
2620 */
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002621 xid = get_xid();
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002622 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2623 volume_info->local_nls);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002624 free_xid(xid);
Joe Perchesf96637b2013-05-04 22:12:25 -05002625 cifs_dbg(FYI, "Tcon rc = %d\n", rc);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002626 if (rc)
2627 goto out_fail;
2628
2629 if (volume_info->nodfs) {
2630 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
Joe Perchesf96637b2013-05-04 22:12:25 -05002631 cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002632 }
2633 tcon->seal = volume_info->seal;
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002634 /*
2635 * We can have only one retry value for a connection to a share so for
2636 * resources mounted more than once to the same server share the last
2637 * value passed in for the retry flag is used.
2638 */
Jeff Laytond00c28d2010-04-24 07:57:44 -04002639 tcon->retry = volume_info->retry;
2640 tcon->nocase = volume_info->nocase;
2641 tcon->local_lease = volume_info->local_lease;
Pavel Shilovsky233839b2012-09-19 06:22:45 -07002642 INIT_LIST_HEAD(&tcon->pending_opens);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002643
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302644 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002645 list_add(&tcon->tcon_list, &ses->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302646 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002647
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302648 cifs_fscache_get_super_cookie(tcon);
2649
Jeff Laytond00c28d2010-04-24 07:57:44 -04002650 return tcon;
2651
2652out_fail:
2653 tconInfoFree(tcon);
2654 return ERR_PTR(rc);
2655}
2656
Jeff Layton9d002df2010-10-06 19:51:11 -04002657void
2658cifs_put_tlink(struct tcon_link *tlink)
2659{
2660 if (!tlink || IS_ERR(tlink))
2661 return;
2662
2663 if (!atomic_dec_and_test(&tlink->tl_count) ||
2664 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2665 tlink->tl_time = jiffies;
2666 return;
2667 }
2668
2669 if (!IS_ERR(tlink_tcon(tlink)))
2670 cifs_put_tcon(tlink_tcon(tlink));
2671 kfree(tlink);
2672 return;
2673}
Jeff Laytond00c28d2010-04-24 07:57:44 -04002674
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002675static inline struct tcon_link *
Pavel Shilovskycd518752011-06-09 12:58:53 +04002676cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2677{
2678 return cifs_sb->master_tlink;
2679}
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002680
2681static int
2682compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2683{
2684 struct cifs_sb_info *old = CIFS_SB(sb);
2685 struct cifs_sb_info *new = mnt_data->cifs_sb;
2686
2687 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2688 return 0;
2689
2690 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2691 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2692 return 0;
2693
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002694 /*
Jeff Layton5eba8ab2011-10-19 15:30:26 -04002695 * We want to share sb only if we don't specify an r/wsize or
2696 * specified r/wsize is greater than or equal to existing one.
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002697 */
2698 if (new->wsize && new->wsize < old->wsize)
2699 return 0;
2700
Jeff Layton5eba8ab2011-10-19 15:30:26 -04002701 if (new->rsize && new->rsize < old->rsize)
2702 return 0;
2703
Eric W. Biederman1f682332013-02-06 01:20:20 -08002704 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002705 return 0;
2706
2707 if (old->mnt_file_mode != new->mnt_file_mode ||
2708 old->mnt_dir_mode != new->mnt_dir_mode)
2709 return 0;
2710
2711 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2712 return 0;
2713
2714 if (old->actimeo != new->actimeo)
2715 return 0;
2716
2717 return 1;
2718}
2719
2720int
2721cifs_match_super(struct super_block *sb, void *data)
2722{
2723 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2724 struct smb_vol *volume_info;
2725 struct cifs_sb_info *cifs_sb;
2726 struct TCP_Server_Info *tcp_srv;
Steve French96daf2b2011-05-27 04:34:02 +00002727 struct cifs_ses *ses;
2728 struct cifs_tcon *tcon;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002729 struct tcon_link *tlink;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002730 int rc = 0;
2731
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002732 spin_lock(&cifs_tcp_ses_lock);
2733 cifs_sb = CIFS_SB(sb);
2734 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2735 if (IS_ERR(tlink)) {
2736 spin_unlock(&cifs_tcp_ses_lock);
2737 return rc;
2738 }
2739 tcon = tlink_tcon(tlink);
2740 ses = tcon->ses;
2741 tcp_srv = ses->server;
2742
2743 volume_info = mnt_data->vol;
2744
Jeff Layton9fa114f2012-11-26 11:09:57 -05002745 if (!match_server(tcp_srv, volume_info) ||
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002746 !match_session(ses, volume_info) ||
2747 !match_tcon(tcon, volume_info->UNC)) {
2748 rc = 0;
2749 goto out;
2750 }
2751
2752 rc = compare_mount_options(sb, mnt_data);
2753out:
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002754 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf484b5d02011-07-11 10:16:34 -04002755 cifs_put_tlink(tlink);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002756 return rc;
2757}
2758
Linus Torvalds1da177e2005-04-16 15:20:36 -07002759int
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002760get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002761 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2762 struct dfs_info3_param **referrals, int remap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002763{
2764 char *temp_unc;
2765 int rc = 0;
2766
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002767 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002768 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002770 *num_referrals = 0;
2771 *referrals = NULL;
2772
2773 if (ses->ipc_tid == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774 temp_unc = kmalloc(2 /* for slashes */ +
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002775 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2776 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002777 if (temp_unc == NULL)
2778 return -ENOMEM;
2779 temp_unc[0] = '\\';
2780 temp_unc[1] = '\\';
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002781 strcpy(temp_unc + 2, ses->serverName);
2782 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2783 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2784 nls_codepage);
Joe Perchesf96637b2013-05-04 22:12:25 -05002785 cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002786 kfree(temp_unc);
2787 }
2788 if (rc == 0)
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002789 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2790 referrals, num_referrals,
2791 nls_codepage, remap);
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002792 /*
2793 * BB - map targetUNCs to dfs_info3 structures, here or in
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002794 * ses->server->ops->get_dfs_refer.
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002795 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002796
2797 return rc;
2798}
2799
Jeff Layton09e50d52008-07-23 10:11:19 -04002800#ifdef CONFIG_DEBUG_LOCK_ALLOC
2801static struct lock_class_key cifs_key[2];
2802static struct lock_class_key cifs_slock_key[2];
2803
2804static inline void
2805cifs_reclassify_socket4(struct socket *sock)
2806{
2807 struct sock *sk = sock->sk;
2808 BUG_ON(sock_owned_by_user(sk));
2809 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2810 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2811}
2812
2813static inline void
2814cifs_reclassify_socket6(struct socket *sock)
2815{
2816 struct sock *sk = sock->sk;
2817 BUG_ON(sock_owned_by_user(sk));
2818 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2819 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2820}
2821#else
2822static inline void
2823cifs_reclassify_socket4(struct socket *sock)
2824{
2825}
2826
2827static inline void
2828cifs_reclassify_socket6(struct socket *sock)
2829{
2830}
2831#endif
2832
Linus Torvalds1da177e2005-04-16 15:20:36 -07002833/* See RFC1001 section 14 on representation of Netbios names */
Steve French50c2f752007-07-13 00:33:32 +00002834static void rfc1002mangle(char *target, char *source, unsigned int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002835{
Steve French50c2f752007-07-13 00:33:32 +00002836 unsigned int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002837
Steve French50c2f752007-07-13 00:33:32 +00002838 for (i = 0, j = 0; i < (length); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002839 /* mask a nibble at a time and encode */
2840 target[j] = 'A' + (0x0F & (source[i] >> 4));
2841 target[j+1] = 'A' + (0x0F & source[i]);
Steve French50c2f752007-07-13 00:33:32 +00002842 j += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002843 }
2844
2845}
2846
Ben Greear3eb9a882010-09-01 17:06:02 -07002847static int
2848bind_socket(struct TCP_Server_Info *server)
2849{
2850 int rc = 0;
2851 if (server->srcaddr.ss_family != AF_UNSPEC) {
2852 /* Bind to the specified local IP address */
2853 struct socket *socket = server->ssocket;
2854 rc = socket->ops->bind(socket,
2855 (struct sockaddr *) &server->srcaddr,
2856 sizeof(server->srcaddr));
2857 if (rc < 0) {
2858 struct sockaddr_in *saddr4;
2859 struct sockaddr_in6 *saddr6;
2860 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2861 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2862 if (saddr6->sin6_family == AF_INET6)
Joe Perchesf96637b2013-05-04 22:12:25 -05002863 cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
2864 &saddr6->sin6_addr, rc);
Ben Greear3eb9a882010-09-01 17:06:02 -07002865 else
Joe Perchesf96637b2013-05-04 22:12:25 -05002866 cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
2867 &saddr4->sin_addr.s_addr, rc);
Ben Greear3eb9a882010-09-01 17:06:02 -07002868 }
2869 }
2870 return rc;
2871}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002872
2873static int
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002874ip_rfc1001_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002875{
2876 int rc = 0;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002877 /*
2878 * some servers require RFC1001 sessinit before sending
2879 * negprot - BB check reconnection in case where second
2880 * sessinit is sent but no second negprot
2881 */
2882 struct rfc1002_session_packet *ses_init_buf;
2883 struct smb_hdr *smb_buf;
2884 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2885 GFP_KERNEL);
2886 if (ses_init_buf) {
2887 ses_init_buf->trailer.session_req.called_len = 32;
2888
2889 if (server->server_RFC1001_name &&
2890 server->server_RFC1001_name[0] != 0)
2891 rfc1002mangle(ses_init_buf->trailer.
2892 session_req.called_name,
2893 server->server_RFC1001_name,
2894 RFC1001_NAME_LEN_WITH_NULL);
2895 else
2896 rfc1002mangle(ses_init_buf->trailer.
2897 session_req.called_name,
2898 DEFAULT_CIFS_CALLED_NAME,
2899 RFC1001_NAME_LEN_WITH_NULL);
2900
2901 ses_init_buf->trailer.session_req.calling_len = 32;
2902
2903 /*
2904 * calling name ends in null (byte 16) from old smb
2905 * convention.
2906 */
2907 if (server->workstation_RFC1001_name &&
2908 server->workstation_RFC1001_name[0] != 0)
2909 rfc1002mangle(ses_init_buf->trailer.
2910 session_req.calling_name,
2911 server->workstation_RFC1001_name,
2912 RFC1001_NAME_LEN_WITH_NULL);
2913 else
2914 rfc1002mangle(ses_init_buf->trailer.
2915 session_req.calling_name,
2916 "LINUX_CIFS_CLNT",
2917 RFC1001_NAME_LEN_WITH_NULL);
2918
2919 ses_init_buf->trailer.session_req.scope1 = 0;
2920 ses_init_buf->trailer.session_req.scope2 = 0;
2921 smb_buf = (struct smb_hdr *)ses_init_buf;
2922
2923 /* sizeof RFC1002_SESSION_REQUEST with no scope */
Steve Frenchbe8e3b02011-04-29 05:40:20 +00002924 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002925 rc = smb_send(server, smb_buf, 0x44);
2926 kfree(ses_init_buf);
2927 /*
2928 * RFC1001 layer in at least one server
2929 * requires very short break before negprot
2930 * presumably because not expecting negprot
2931 * to follow so fast. This is a simple
2932 * solution that works without
2933 * complicating the code and causes no
2934 * significant slowing down on mount
2935 * for everyone else
2936 */
2937 usleep_range(1000, 2000);
2938 }
2939 /*
2940 * else the negprot may still work without this
2941 * even though malloc failed
2942 */
2943
2944 return rc;
2945}
2946
2947static int
2948generic_ip_connect(struct TCP_Server_Info *server)
2949{
2950 int rc = 0;
Steve French6da97912011-03-13 18:55:55 +00002951 __be16 sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002952 int slen, sfamily;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002953 struct socket *socket = server->ssocket;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002954 struct sockaddr *saddr;
2955
2956 saddr = (struct sockaddr *) &server->dstaddr;
2957
2958 if (server->dstaddr.ss_family == AF_INET6) {
2959 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2960 slen = sizeof(struct sockaddr_in6);
2961 sfamily = AF_INET6;
2962 } else {
2963 sport = ((struct sockaddr_in *) saddr)->sin_port;
2964 slen = sizeof(struct sockaddr_in);
2965 sfamily = AF_INET;
2966 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002967
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002968 if (socket == NULL) {
Rob Landleyf1d0c992011-01-22 15:44:05 -06002969 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2970 IPPROTO_TCP, &socket, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002971 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002972 cifs_dbg(VFS, "Error %d creating socket\n", rc);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002973 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002974 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002975 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002976
2977 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesf96637b2013-05-04 22:12:25 -05002978 cifs_dbg(FYI, "Socket created\n");
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002979 server->ssocket = socket;
2980 socket->sk->sk_allocation = GFP_NOFS;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002981 if (sfamily == AF_INET6)
2982 cifs_reclassify_socket6(socket);
2983 else
2984 cifs_reclassify_socket4(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002985 }
2986
Ben Greear3eb9a882010-09-01 17:06:02 -07002987 rc = bind_socket(server);
2988 if (rc < 0)
2989 return rc;
2990
Jeff Laytond5c56052008-12-01 18:42:33 -05002991 /*
2992 * Eventually check for other socket options to change from
2993 * the default. sock_setsockopt not used because it expects
2994 * user space buffer
2995 */
2996 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00002997 socket->sk->sk_sndtimeo = 5 * HZ;
Steve French6a5fa2362010-01-01 01:28:43 +00002998
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002999 /* make the bufsizes depend on wsize/rsize and max requests */
3000 if (server->noautotune) {
3001 if (socket->sk->sk_sndbuf < (200 * 1024))
3002 socket->sk->sk_sndbuf = 200 * 1024;
3003 if (socket->sk->sk_rcvbuf < (140 * 1024))
3004 socket->sk->sk_rcvbuf = 140 * 1024;
3005 }
3006
Steve French6a5fa2362010-01-01 01:28:43 +00003007 if (server->tcp_nodelay) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003008 int val = 1;
Steve French6a5fa2362010-01-01 01:28:43 +00003009 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
3010 (char *)&val, sizeof(val));
3011 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -05003012 cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n",
3013 rc);
Steve French6a5fa2362010-01-01 01:28:43 +00003014 }
3015
Joe Perchesf96637b2013-05-04 22:12:25 -05003016 cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003017 socket->sk->sk_sndbuf,
3018 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
3019
Jeff Laytonee1b3ea2011-06-21 07:18:26 -04003020 rc = socket->ops->connect(socket, saddr, slen, 0);
3021 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003022 cifs_dbg(FYI, "Error %d connecting to server\n", rc);
Jeff Laytonee1b3ea2011-06-21 07:18:26 -04003023 sock_release(socket);
3024 server->ssocket = NULL;
3025 return rc;
3026 }
3027
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003028 if (sport == htons(RFC1001_PORT))
3029 rc = ip_rfc1001_connect(server);
Steve French50c2f752007-07-13 00:33:32 +00003030
Linus Torvalds1da177e2005-04-16 15:20:36 -07003031 return rc;
3032}
3033
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003034static int
3035ip_connect(struct TCP_Server_Info *server)
3036{
Steve French6da97912011-03-13 18:55:55 +00003037 __be16 *sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003038 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3039 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
3040
3041 if (server->dstaddr.ss_family == AF_INET6)
3042 sport = &addr6->sin6_port;
3043 else
3044 sport = &addr->sin_port;
3045
3046 if (*sport == 0) {
3047 int rc;
3048
3049 /* try with 445 port at first */
3050 *sport = htons(CIFS_PORT);
3051
3052 rc = generic_ip_connect(server);
3053 if (rc >= 0)
3054 return rc;
3055
3056 /* if it failed, try with 139 port */
3057 *sport = htons(RFC1001_PORT);
3058 }
3059
3060 return generic_ip_connect(server);
3061}
3062
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003063void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
Al Viro2c6292a2011-06-17 09:05:48 -04003064 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
Steve French8af18972007-02-14 04:42:51 +00003065{
3066 /* if we are reconnecting then should we check to see if
3067 * any requested capabilities changed locally e.g. via
3068 * remount but we can not do much about it here
3069 * if they have (even if we could detect it by the following)
3070 * Perhaps we could add a backpointer to array of sb from tcon
3071 * or if we change to make all sb to same share the same
3072 * sb as NFS - then we only have one backpointer to sb.
3073 * What if we wanted to mount the server share twice once with
3074 * and once without posixacls or posix paths? */
3075 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00003076
Steve Frenchc18c8422007-07-18 23:21:09 +00003077 if (vol_info && vol_info->no_linux_ext) {
3078 tcon->fsUnixInfo.Capability = 0;
3079 tcon->unix_ext = 0; /* Unix Extensions disabled */
Joe Perchesf96637b2013-05-04 22:12:25 -05003080 cifs_dbg(FYI, "Linux protocol extensions disabled\n");
Steve Frenchc18c8422007-07-18 23:21:09 +00003081 return;
3082 } else if (vol_info)
3083 tcon->unix_ext = 1; /* Unix Extensions supported */
3084
3085 if (tcon->unix_ext == 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003086 cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
Steve Frenchc18c8422007-07-18 23:21:09 +00003087 return;
3088 }
Steve French50c2f752007-07-13 00:33:32 +00003089
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003090 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
Steve French8af18972007-02-14 04:42:51 +00003091 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Joe Perchesf96637b2013-05-04 22:12:25 -05003092 cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
Steve French8af18972007-02-14 04:42:51 +00003093 /* check for reconnect case in which we do not
3094 want to change the mount behavior if we can avoid it */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003095 if (vol_info == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003096 /* turn off POSIX ACL and PATHNAMES if not set
Steve French8af18972007-02-14 04:42:51 +00003097 originally at mount time */
3098 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3099 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00003100 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3101 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003102 cifs_dbg(VFS, "POSIXPATH support change\n");
Steve French8af18972007-02-14 04:42:51 +00003103 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00003104 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003105 cifs_dbg(VFS, "possible reconnect error\n");
3106 cifs_dbg(VFS, "server disabled POSIX path support\n");
Igor Mammedov11b6d642008-02-15 19:06:04 +00003107 }
Steve French8af18972007-02-14 04:42:51 +00003108 }
Steve French50c2f752007-07-13 00:33:32 +00003109
Steve French6848b732011-05-26 18:38:54 +00003110 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003111 cifs_dbg(VFS, "per-share encryption not supported yet\n");
Steve French6848b732011-05-26 18:38:54 +00003112
Steve French8af18972007-02-14 04:42:51 +00003113 cap &= CIFS_UNIX_CAP_MASK;
Steve French75865f8c2007-06-24 18:30:48 +00003114 if (vol_info && vol_info->no_psx_acl)
Steve French8af18972007-02-14 04:42:51 +00003115 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00003116 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003117 cifs_dbg(FYI, "negotiated posix acl support\n");
Al Viro2c6292a2011-06-17 09:05:48 -04003118 if (cifs_sb)
3119 cifs_sb->mnt_cifs_flags |=
3120 CIFS_MOUNT_POSIXACL;
Steve French8af18972007-02-14 04:42:51 +00003121 }
3122
Steve French75865f8c2007-06-24 18:30:48 +00003123 if (vol_info && vol_info->posix_paths == 0)
Steve French8af18972007-02-14 04:42:51 +00003124 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00003125 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003126 cifs_dbg(FYI, "negotiate posix pathnames\n");
Al Viro2c6292a2011-06-17 09:05:48 -04003127 if (cifs_sb)
3128 cifs_sb->mnt_cifs_flags |=
Steve French8af18972007-02-14 04:42:51 +00003129 CIFS_MOUNT_POSIX_PATHS;
3130 }
Steve French50c2f752007-07-13 00:33:32 +00003131
Joe Perchesf96637b2013-05-04 22:12:25 -05003132 cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
Steve French8af18972007-02-14 04:42:51 +00003133#ifdef CONFIG_CIFS_DEBUG2
Steve French75865f8c2007-06-24 18:30:48 +00003134 if (cap & CIFS_UNIX_FCNTL_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003135 cifs_dbg(FYI, "FCNTL cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003136 if (cap & CIFS_UNIX_EXTATTR_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003137 cifs_dbg(FYI, "EXTATTR cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003138 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003139 cifs_dbg(FYI, "POSIX path cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003140 if (cap & CIFS_UNIX_XATTR_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003141 cifs_dbg(FYI, "XATTR cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003142 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003143 cifs_dbg(FYI, "POSIX ACL cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003144 if (cap & CIFS_UNIX_LARGE_READ_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003145 cifs_dbg(FYI, "very large read cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003146 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003147 cifs_dbg(FYI, "very large write cap\n");
Steve French6848b732011-05-26 18:38:54 +00003148 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003149 cifs_dbg(FYI, "transport encryption cap\n");
Steve French6848b732011-05-26 18:38:54 +00003150 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003151 cifs_dbg(FYI, "mandatory transport encryption cap\n");
Steve French8af18972007-02-14 04:42:51 +00003152#endif /* CIFS_DEBUG2 */
3153 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
Steve French442aa312007-09-24 20:25:46 +00003154 if (vol_info == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003155 cifs_dbg(FYI, "resetting capabilities failed\n");
Steve French442aa312007-09-24 20:25:46 +00003156 } else
Joe Perchesf96637b2013-05-04 22:12:25 -05003157 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 +00003158
Steve French8af18972007-02-14 04:42:51 +00003159 }
3160 }
3161}
3162
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003163void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3164 struct cifs_sb_info *cifs_sb)
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04003165{
Jeff Layton2de970f2010-10-06 19:51:12 -04003166 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3167
Al Viro2ced6f62011-06-17 09:20:04 -04003168 spin_lock_init(&cifs_sb->tlink_tree_lock);
3169 cifs_sb->tlink_tree = RB_ROOT;
3170
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003171 /*
Jeff Layton5eba8ab2011-10-19 15:30:26 -04003172 * Temporarily set r/wsize for matching superblock. If we end up using
3173 * new sb then client will later negotiate it downward if needed.
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003174 */
Jeff Layton5eba8ab2011-10-19 15:30:26 -04003175 cifs_sb->rsize = pvolume_info->rsize;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003176 cifs_sb->wsize = pvolume_info->wsize;
3177
Steve French3b795212008-11-13 19:45:32 +00003178 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3179 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3180 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3181 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
Joe Perchesf96637b2013-05-04 22:12:25 -05003182 cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n",
3183 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
Steve French3b795212008-11-13 19:45:32 +00003184
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05303185 cifs_sb->actimeo = pvolume_info->actimeo;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003186 cifs_sb->local_nls = pvolume_info->local_nls;
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05303187
Steve French3b795212008-11-13 19:45:32 +00003188 if (pvolume_info->noperm)
3189 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3190 if (pvolume_info->setuids)
3191 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3192 if (pvolume_info->server_ino)
3193 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3194 if (pvolume_info->remap)
3195 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3196 if (pvolume_info->no_xattr)
3197 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3198 if (pvolume_info->sfu_emul)
3199 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3200 if (pvolume_info->nobrl)
3201 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
Steve Frenchbe652442009-02-23 15:21:59 +00003202 if (pvolume_info->nostrictsync)
Steve French4717bed2009-02-24 14:44:19 +00003203 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
Steve French13a6e422008-12-02 17:24:33 +00003204 if (pvolume_info->mand_lock)
3205 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00003206 if (pvolume_info->rwpidforward)
3207 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
Steve French3b795212008-11-13 19:45:32 +00003208 if (pvolume_info->cifs_acl)
3209 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003210 if (pvolume_info->backupuid_specified) {
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05003211 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003212 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3213 }
3214 if (pvolume_info->backupgid_specified) {
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05003215 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003216 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3217 }
Steve French3b795212008-11-13 19:45:32 +00003218 if (pvolume_info->override_uid)
3219 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3220 if (pvolume_info->override_gid)
3221 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3222 if (pvolume_info->dynperm)
3223 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05303224 if (pvolume_info->fsc)
3225 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
Jeff Layton0eb8a132010-10-06 19:51:12 -04003226 if (pvolume_info->multiuser)
3227 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3228 CIFS_MOUNT_NO_PERM);
Pavel Shilovskyd39454f2011-01-24 14:16:35 -05003229 if (pvolume_info->strict_io)
3230 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
Steve French3b795212008-11-13 19:45:32 +00003231 if (pvolume_info->direct_io) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003232 cifs_dbg(FYI, "mounting share using direct i/o\n");
Steve French3b795212008-11-13 19:45:32 +00003233 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3234 }
Stefan Metzmacher736a3322010-07-30 14:56:00 +02003235 if (pvolume_info->mfsymlinks) {
3236 if (pvolume_info->sfu_emul) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003237 cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n");
Stefan Metzmacher736a3322010-07-30 14:56:00 +02003238 } else {
3239 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3240 }
3241 }
Steve French3b795212008-11-13 19:45:32 +00003242
3243 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
Joe Perchesf96637b2013-05-04 22:12:25 -05003244 cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04003245}
3246
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003247static void
3248cleanup_volume_info_contents(struct smb_vol *volume_info)
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003249{
Sean Finneyb9468452011-04-11 13:19:32 +00003250 kfree(volume_info->username);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003251 kzfree(volume_info->password);
Jesper Juhl95c75452011-08-27 18:58:34 +02003252 kfree(volume_info->UNC);
Sean Finneyb9468452011-04-11 13:19:32 +00003253 kfree(volume_info->domainname);
3254 kfree(volume_info->iocharset);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003255 kfree(volume_info->prepath);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003256}
3257
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003258void
3259cifs_cleanup_volume_info(struct smb_vol *volume_info)
3260{
3261 if (!volume_info)
3262 return;
3263 cleanup_volume_info_contents(volume_info);
3264 kfree(volume_info);
3265}
3266
3267
Steve French2d6d5892009-04-09 00:36:44 +00003268#ifdef CONFIG_CIFS_DFS_UPCALL
Steve French6d3ea7e2012-11-28 22:34:41 -06003269/*
3270 * cifs_build_path_to_root returns full path to root when we do not have an
3271 * exiting connection (tcon)
3272 */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003273static char *
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003274build_unc_path_to_root(const struct smb_vol *vol,
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003275 const struct cifs_sb_info *cifs_sb)
3276{
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003277 char *full_path, *pos;
Jeff Layton839db3d2012-12-10 06:10:45 -05003278 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003279 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003280
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003281 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003282 if (full_path == NULL)
3283 return ERR_PTR(-ENOMEM);
3284
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003285 strncpy(full_path, vol->UNC, unc_len);
3286 pos = full_path + unc_len;
3287
3288 if (pplen) {
Jeff Layton1fc29ba2013-05-31 10:00:18 -04003289 *pos = CIFS_DIR_SEP(cifs_sb);
3290 strncpy(pos + 1, vol->prepath, pplen);
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003291 pos += pplen;
3292 }
3293
3294 *pos = '\0'; /* add trailing null */
Steve Frenchf87d39d2011-05-27 03:50:55 +00003295 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
Joe Perchesf96637b2013-05-04 22:12:25 -05003296 cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003297 return full_path;
3298}
Sean Finneydd613942011-04-11 13:19:30 +00003299
3300/*
3301 * Perform a dfs referral query for a share and (optionally) prefix
3302 *
Sean Finney046462a2011-04-11 13:19:33 +00003303 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3304 * to a string containing updated options for the submount. Otherwise it
3305 * will be left untouched.
Sean Finneydd613942011-04-11 13:19:30 +00003306 *
3307 * Returns the rc from get_dfs_path to the caller, which can be used to
3308 * determine whether there were referrals.
3309 */
3310static int
Pavel Shilovskyb669f332012-05-27 20:21:53 +04003311expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
Sean Finneydd613942011-04-11 13:19:30 +00003312 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
Sean Finney046462a2011-04-11 13:19:33 +00003313 int check_prefix)
Sean Finneydd613942011-04-11 13:19:30 +00003314{
3315 int rc;
3316 unsigned int num_referrals = 0;
3317 struct dfs_info3_param *referrals = NULL;
3318 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3319
3320 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3321 if (IS_ERR(full_path))
3322 return PTR_ERR(full_path);
3323
3324 /* For DFS paths, skip the first '\' of the UNC */
3325 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3326
Pavel Shilovskyb669f332012-05-27 20:21:53 +04003327 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
Sean Finneydd613942011-04-11 13:19:30 +00003328 &num_referrals, &referrals,
3329 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3330
3331 if (!rc && num_referrals > 0) {
3332 char *fake_devname = NULL;
3333
3334 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3335 full_path + 1, referrals,
3336 &fake_devname);
3337
3338 free_dfs_info_array(referrals, num_referrals);
Sean Finney046462a2011-04-11 13:19:33 +00003339
Sean Finneydd613942011-04-11 13:19:30 +00003340 if (IS_ERR(mdata)) {
3341 rc = PTR_ERR(mdata);
3342 mdata = NULL;
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003343 } else {
3344 cleanup_volume_info_contents(volume_info);
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003345 rc = cifs_setup_volume_info(volume_info, mdata,
3346 fake_devname);
Sean Finneydd613942011-04-11 13:19:30 +00003347 }
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003348 kfree(fake_devname);
3349 kfree(cifs_sb->mountdata);
Sean Finney046462a2011-04-11 13:19:33 +00003350 cifs_sb->mountdata = mdata;
Sean Finneydd613942011-04-11 13:19:30 +00003351 }
3352 kfree(full_path);
3353 return rc;
3354}
Steve French2d6d5892009-04-09 00:36:44 +00003355#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003356
Jeff Layton04db79b2011-07-06 08:10:38 -04003357static int
3358cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3359 const char *devname)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003360{
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003361 int rc = 0;
Sean Finneydd613942011-04-11 13:19:30 +00003362
Jeff Layton04db79b2011-07-06 08:10:38 -04003363 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3364 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003365
Jeff Layton7586b762008-12-01 18:41:49 -05003366 if (volume_info->nullauth) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003367 cifs_dbg(FYI, "Anonymous login\n");
Jeff Layton04febab2012-01-17 16:09:15 -05003368 kfree(volume_info->username);
3369 volume_info->username = NULL;
Jeff Layton7586b762008-12-01 18:41:49 -05003370 } else if (volume_info->username) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003371 /* BB fixme parse for domain name here */
Joe Perchesf96637b2013-05-04 22:12:25 -05003372 cifs_dbg(FYI, "Username: %s\n", volume_info->username);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -05003374 cifs_dbg(VFS, "No username specified\n");
Steve French50c2f752007-07-13 00:33:32 +00003375 /* In userspace mount helper we can get user name from alternate
3376 locations such as env variables and files on disk */
Jeff Layton04db79b2011-07-06 08:10:38 -04003377 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378 }
3379
Linus Torvalds1da177e2005-04-16 15:20:36 -07003380 /* this is needed for ASCII cp to Unicode converts */
Jeff Layton7586b762008-12-01 18:41:49 -05003381 if (volume_info->iocharset == NULL) {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003382 /* load_nls_default cannot return null */
3383 volume_info->local_nls = load_nls_default();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003384 } else {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003385 volume_info->local_nls = load_nls(volume_info->iocharset);
3386 if (volume_info->local_nls == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003387 cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
Joe Perchesb6b38f72010-04-21 03:50:45 +00003388 volume_info->iocharset);
Jeff Layton04db79b2011-07-06 08:10:38 -04003389 return -ELIBACC;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003390 }
3391 }
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003392
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003393 return rc;
Jeff Layton04db79b2011-07-06 08:10:38 -04003394}
3395
3396struct smb_vol *
3397cifs_get_volume_info(char *mount_data, const char *devname)
3398{
3399 int rc;
3400 struct smb_vol *volume_info;
3401
Jeff Layton6ee95422012-11-26 11:09:57 -05003402 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
Jeff Layton04db79b2011-07-06 08:10:38 -04003403 if (!volume_info)
3404 return ERR_PTR(-ENOMEM);
3405
3406 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3407 if (rc) {
3408 cifs_cleanup_volume_info(volume_info);
3409 volume_info = ERR_PTR(rc);
3410 }
3411
3412 return volume_info;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003413}
3414
3415int
Al Viro2c6292a2011-06-17 09:05:48 -04003416cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003417{
Jeff Layton1daaae82012-03-21 06:30:40 -04003418 int rc;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003419 unsigned int xid;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003420 struct cifs_ses *ses;
Steve French96daf2b2011-05-27 04:34:02 +00003421 struct cifs_tcon *tcon;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003422 struct TCP_Server_Info *server;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003423 char *full_path;
3424 struct tcon_link *tlink;
3425#ifdef CONFIG_CIFS_DFS_UPCALL
3426 int referral_walks_count = 0;
Jeff Layton20547492011-07-09 12:21:07 -04003427#endif
Al Virodd854462011-06-17 08:24:42 -04003428
3429 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3430 if (rc)
3431 return rc;
3432
Jeff Layton20547492011-07-09 12:21:07 -04003433#ifdef CONFIG_CIFS_DFS_UPCALL
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003434try_mount_again:
3435 /* cleanup activities if we're chasing a referral */
3436 if (referral_walks_count) {
3437 if (tcon)
3438 cifs_put_tcon(tcon);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003439 else if (ses)
3440 cifs_put_smb_ses(ses);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003441
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003442 free_xid(xid);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003443 }
3444#endif
Jeff Layton1daaae82012-03-21 06:30:40 -04003445 rc = 0;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003446 tcon = NULL;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003447 ses = NULL;
3448 server = NULL;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003449 full_path = NULL;
3450 tlink = NULL;
3451
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003452 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003453
Jeff Layton63c038c2008-12-01 18:41:46 -05003454 /* get a reference to a tcp session */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003455 server = cifs_get_tcp_session(volume_info);
3456 if (IS_ERR(server)) {
3457 rc = PTR_ERR(server);
Al Virodd854462011-06-17 08:24:42 -04003458 bdi_destroy(&cifs_sb->bdi);
Jeff Layton63c038c2008-12-01 18:41:46 -05003459 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003460 }
3461
Jeff Layton36988c72010-04-24 07:57:43 -04003462 /* get a reference to a SMB session */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003463 ses = cifs_get_smb_ses(server, volume_info);
3464 if (IS_ERR(ses)) {
3465 rc = PTR_ERR(ses);
3466 ses = NULL;
Jeff Layton36988c72010-04-24 07:57:43 -04003467 goto mount_fail_check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003468 }
Steve French50c2f752007-07-13 00:33:32 +00003469
Jeff Laytond00c28d2010-04-24 07:57:44 -04003470 /* search for existing tcon to this server share */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003471 tcon = cifs_get_tcon(ses, volume_info);
Jeff Laytond00c28d2010-04-24 07:57:44 -04003472 if (IS_ERR(tcon)) {
3473 rc = PTR_ERR(tcon);
3474 tcon = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003475 goto remote_path_check;
Jeff Laytond00c28d2010-04-24 07:57:44 -04003476 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003477
Steve French6848b732011-05-26 18:38:54 +00003478 /* tell server which Unix caps we support */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003479 if (cap_unix(tcon->ses)) {
Steve French6848b732011-05-26 18:38:54 +00003480 /* reset of caps checks mount to see if unix extensions
3481 disabled for just this mount */
Al Viro2c6292a2011-06-17 09:05:48 -04003482 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
Steve French6848b732011-05-26 18:38:54 +00003483 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3484 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3485 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3486 rc = -EACCES;
3487 goto mount_fail_check;
3488 }
3489 } else
3490 tcon->unix_ext = 0; /* server does not support them */
3491
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003492 /* do not care if a following call succeed - informational */
3493 if (!tcon->ipc && server->ops->qfs_tcon)
3494 server->ops->qfs_tcon(xid, tcon);
Steve Frenchd82c2df2008-11-15 00:07:26 +00003495
Pavel Shilovsky24985c52012-09-18 16:20:28 -07003496 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3497 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
Jeff Laytonf7910cb2011-05-19 16:22:58 -04003498
Jeff Layton66bfaad2011-10-19 15:30:35 -04003499 /* tune readahead according to rsize */
Jeff Layton8f714652012-05-01 17:41:49 -04003500 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
Jeff Layton03ceace2010-12-06 21:07:33 -05003501
Igor Mammedove4cce942009-02-10 14:10:26 +03003502remote_path_check:
3503#ifdef CONFIG_CIFS_DFS_UPCALL
3504 /*
3505 * Perform an unconditional check for whether there are DFS
3506 * referrals for this path without prefix, to provide support
3507 * for DFS referrals from w2k8 servers which don't seem to respond
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003508 * with PATH_NOT_COVERED to requests that include the prefix.
3509 * Chase the referral if found, otherwise continue normally.
Steve Frenchd036f502009-04-03 03:12:08 +00003510 */
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003511 if (referral_walks_count == 0) {
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003512 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3513 false);
Steve Frencheeac8042006-01-13 21:34:58 -08003514 if (!refrc) {
Steve French4523cc32007-04-30 20:13:06 +00003515 referral_walks_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003516 goto try_mount_again;
3517 }
3518 }
3519#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003520
Steve Frenchf87d39d2011-05-27 03:50:55 +00003521 /* check if a whole path is not remote */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003522 if (!rc && tcon) {
Pavel Shilovsky68889f22012-05-25 14:40:22 +04003523 if (!server->ops->is_path_accessible) {
3524 rc = -ENOSYS;
3525 goto mount_fail_check;
3526 }
Steve French6d3ea7e2012-11-28 22:34:41 -06003527 /*
3528 * cifs_build_path_to_root works only when we have a valid tcon
3529 */
3530 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003531 if (full_path == NULL) {
3532 rc = -ENOMEM;
3533 goto mount_fail_check;
3534 }
Pavel Shilovsky68889f22012-05-25 14:40:22 +04003535 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3536 full_path);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003537 if (rc != 0 && rc != -EREMOTE) {
3538 kfree(full_path);
3539 goto mount_fail_check;
3540 }
3541 kfree(full_path);
3542 }
3543
3544 /* get referral if needed */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003545 if (rc == -EREMOTE) {
3546#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003547 if (referral_walks_count > MAX_NESTED_LINKS) {
3548 /*
3549 * BB: when we implement proper loop detection,
3550 * we will remove this check. But now we need it
3551 * to prevent an indefinite loop if 'DFS tree' is
3552 * misconfigured (i.e. has loops).
3553 */
3554 rc = -ELOOP;
3555 goto mount_fail_check;
3556 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003557
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003558 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
Jeff Layton7b91e262009-07-23 15:22:30 -04003559
Sean Finneydd613942011-04-11 13:19:30 +00003560 if (!rc) {
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003561 referral_walks_count++;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003562 goto try_mount_again;
3563 }
Sean Finneydd613942011-04-11 13:19:30 +00003564 goto mount_fail_check;
Steve Frenchd036f502009-04-03 03:12:08 +00003565#else /* No DFS support, return error on mount */
3566 rc = -EOPNOTSUPP;
3567#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003568 }
3569
Jeff Layton9d002df2010-10-06 19:51:11 -04003570 if (rc)
3571 goto mount_fail_check;
3572
3573 /* now, hang the tcon off of the superblock */
3574 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3575 if (tlink == NULL) {
3576 rc = -ENOMEM;
3577 goto mount_fail_check;
3578 }
3579
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003580 tlink->tl_uid = ses->linux_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -04003581 tlink->tl_tcon = tcon;
3582 tlink->tl_time = jiffies;
3583 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3584 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3585
Jeff Layton413e6612010-10-28 13:33:38 -04003586 cifs_sb->master_tlink = tlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04003587 spin_lock(&cifs_sb->tlink_tree_lock);
3588 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3589 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton413e6612010-10-28 13:33:38 -04003590
Jeff Laytonda472fc2012-03-23 14:40:53 -04003591 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
Jeff Layton2de970f2010-10-06 19:51:12 -04003592 TLINK_IDLE_EXPIRE);
3593
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003594mount_fail_check:
3595 /* on error free sesinfo and tcon struct if needed */
3596 if (rc) {
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003597 /* If find_unc succeeded then rc == 0 so we can not end */
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003598 /* up accidentally freeing someone elses tcon struct */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003599 if (tcon)
3600 cifs_put_tcon(tcon);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003601 else if (ses)
3602 cifs_put_smb_ses(ses);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003603 else
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003604 cifs_put_tcp_session(server);
Al Virodd854462011-06-17 08:24:42 -04003605 bdi_destroy(&cifs_sb->bdi);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003606 }
3607
Linus Torvalds1da177e2005-04-16 15:20:36 -07003608out:
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003609 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003610 return rc;
3611}
3612
Jeff Layton8d1bca32011-06-11 21:17:10 -04003613/*
3614 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3615 * pointer may be NULL.
3616 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003617int
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04003618CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
Steve French96daf2b2011-05-27 04:34:02 +00003619 const char *tree, struct cifs_tcon *tcon,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003620 const struct nls_table *nls_codepage)
3621{
3622 struct smb_hdr *smb_buffer;
3623 struct smb_hdr *smb_buffer_response;
3624 TCONX_REQ *pSMB;
3625 TCONX_RSP *pSMBr;
3626 unsigned char *bcc_ptr;
3627 int rc = 0;
Jeff Layton690c5222011-01-20 13:36:51 -05003628 int length;
3629 __u16 bytes_left, count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003630
3631 if (ses == NULL)
3632 return -EIO;
3633
3634 smb_buffer = cifs_buf_get();
Steve Frenchca43e3b2009-09-01 17:20:50 +00003635 if (smb_buffer == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003636 return -ENOMEM;
Steve Frenchca43e3b2009-09-01 17:20:50 +00003637
Linus Torvalds1da177e2005-04-16 15:20:36 -07003638 smb_buffer_response = smb_buffer;
3639
3640 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3641 NULL /*no tid */ , 4 /*wct */ );
Steve French1982c342005-08-17 12:38:22 -07003642
Pavel Shilovsky88257362012-05-23 14:01:59 +04003643 smb_buffer->Mid = get_next_mid(ses->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003644 smb_buffer->Uid = ses->Suid;
3645 pSMB = (TCONX_REQ *) smb_buffer;
3646 pSMBr = (TCONX_RSP *) smb_buffer_response;
3647
3648 pSMB->AndXCommand = 0xFF;
3649 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003650 bcc_ptr = &pSMB->Password[0];
Jeff Layton8d1bca32011-06-11 21:17:10 -04003651 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
Steve Frencheeac8042006-01-13 21:34:58 -08003652 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
Steve French7c7b25b2006-06-01 19:20:10 +00003653 *bcc_ptr = 0; /* password is null byte */
Steve Frencheeac8042006-01-13 21:34:58 -08003654 bcc_ptr++; /* skip password */
Steve French7c7b25b2006-06-01 19:20:10 +00003655 /* already aligned so no need to do it below */
Steve Frencheeac8042006-01-13 21:34:58 -08003656 } else {
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003657 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
Steve Frencheeac8042006-01-13 21:34:58 -08003658 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3659 specified as required (when that support is added to
3660 the vfs in the future) as only NTLM or the much
Steve French7c7b25b2006-06-01 19:20:10 +00003661 weaker LANMAN (which we do not send by default) is accepted
Steve Frencheeac8042006-01-13 21:34:58 -08003662 by Samba (not sure whether other servers allow
3663 NTLMv2 password here) */
Steve French7c7b25b2006-06-01 19:20:10 +00003664#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton04912d62010-04-24 07:57:45 -04003665 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
Jeff Layton3f618222013-06-12 19:52:14 -05003666 (ses->sectype == LANMAN))
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -05003667 calc_lanman_hash(tcon->password, ses->server->cryptkey,
Steve French96daf2b2011-05-27 04:34:02 +00003668 ses->server->sec_mode &
Jeff Layton4e53a3f2008-12-05 20:41:21 -05003669 SECMODE_PW_ENCRYPT ? true : false,
3670 bcc_ptr);
Steve French7c7b25b2006-06-01 19:20:10 +00003671 else
3672#endif /* CIFS_WEAK_PW_HASH */
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -06003673 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
Shirish Pargaonkar9ef59922011-10-20 13:21:59 -05003674 bcc_ptr, nls_codepage);
Steve Frencheeac8042006-01-13 21:34:58 -08003675
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003676 bcc_ptr += CIFS_AUTH_RESP_SIZE;
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003677 if (ses->capabilities & CAP_UNICODE) {
Steve French7c7b25b2006-06-01 19:20:10 +00003678 /* must align unicode strings */
3679 *bcc_ptr = 0; /* null byte password */
3680 bcc_ptr++;
3681 }
Steve Frencheeac8042006-01-13 21:34:58 -08003682 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003683
Jeff Layton38d77c52013-05-26 07:01:00 -04003684 if (ses->server->sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003685 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3686
3687 if (ses->capabilities & CAP_STATUS32) {
3688 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3689 }
3690 if (ses->capabilities & CAP_DFS) {
3691 smb_buffer->Flags2 |= SMBFLG2_DFS;
3692 }
3693 if (ses->capabilities & CAP_UNICODE) {
3694 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3695 length =
Steve Frenchacbbb762012-01-18 22:32:33 -06003696 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
Steve French50c2f752007-07-13 00:33:32 +00003697 6 /* max utf8 char length in bytes */ *
Steve Frencha878fb22006-05-30 18:04:19 +00003698 (/* server len*/ + 256 /* share len */), nls_codepage);
3699 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003700 bcc_ptr += 2; /* skip trailing null */
3701 } else { /* ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003702 strcpy(bcc_ptr, tree);
3703 bcc_ptr += strlen(tree) + 1;
3704 }
3705 strcpy(bcc_ptr, "?????");
3706 bcc_ptr += strlen("?????");
3707 bcc_ptr += 1;
3708 count = bcc_ptr - &pSMB->Password[0];
Steve Frenchbe8e3b02011-04-29 05:40:20 +00003709 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3710 pSMB->hdr.smb_buf_length) + count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003711 pSMB->ByteCount = cpu_to_le16(count);
3712
Steve French133672e2007-11-13 22:41:37 +00003713 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
Jeff Layton77499812011-01-11 07:24:23 -05003714 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003715
Linus Torvalds1da177e2005-04-16 15:20:36 -07003716 /* above now done in SendReceive */
3717 if ((rc == 0) && (tcon != NULL)) {
Steve French0e0d2cf2009-05-01 05:27:32 +00003718 bool is_unicode;
3719
Linus Torvalds1da177e2005-04-16 15:20:36 -07003720 tcon->tidStatus = CifsGood;
Steve French3b795212008-11-13 19:45:32 +00003721 tcon->need_reconnect = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003722 tcon->tid = smb_buffer_response->Tid;
3723 bcc_ptr = pByteArea(smb_buffer_response);
Jeff Layton690c5222011-01-20 13:36:51 -05003724 bytes_left = get_bcc(smb_buffer_response);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003725 length = strnlen(bcc_ptr, bytes_left - 2);
Steve French0e0d2cf2009-05-01 05:27:32 +00003726 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3727 is_unicode = true;
3728 else
3729 is_unicode = false;
3730
Jeff Laytoncc20c032009-04-30 07:16:21 -04003731
Steve French50c2f752007-07-13 00:33:32 +00003732 /* skip service field (NB: this field is always ASCII) */
Steve French7f8ed422007-09-28 22:28:55 +00003733 if (length == 3) {
3734 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3735 (bcc_ptr[2] == 'C')) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003736 cifs_dbg(FYI, "IPC connection\n");
Steve French7f8ed422007-09-28 22:28:55 +00003737 tcon->ipc = 1;
3738 }
3739 } else if (length == 2) {
3740 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3741 /* the most common case */
Joe Perchesf96637b2013-05-04 22:12:25 -05003742 cifs_dbg(FYI, "disk share connection\n");
Steve French7f8ed422007-09-28 22:28:55 +00003743 }
3744 }
Steve French50c2f752007-07-13 00:33:32 +00003745 bcc_ptr += length + 1;
Jeff Laytoncc20c032009-04-30 07:16:21 -04003746 bytes_left -= (length + 1);
Zhao Hongjiang46b51d02013-06-24 01:57:47 -05003747 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
Jeff Laytoncc20c032009-04-30 07:16:21 -04003748
3749 /* mostly informational -- no need to fail on error here */
Jeff Layton90a98b22009-07-20 13:40:52 -04003750 kfree(tcon->nativeFileSystem);
Steve Frenchacbbb762012-01-18 22:32:33 -06003751 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
Steve French0e0d2cf2009-05-01 05:27:32 +00003752 bytes_left, is_unicode,
Jeff Laytoncc20c032009-04-30 07:16:21 -04003753 nls_codepage);
3754
Joe Perchesf96637b2013-05-04 22:12:25 -05003755 cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003756
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003757 if ((smb_buffer_response->WordCount == 3) ||
Steve French1a4e15a2006-10-12 21:33:51 +00003758 (smb_buffer_response->WordCount == 7))
3759 /* field is in same location */
Steve French39798772006-05-31 22:40:51 +00003760 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3761 else
3762 tcon->Flags = 0;
Joe Perchesf96637b2013-05-04 22:12:25 -05003763 cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003764 } else if ((rc == 0) && tcon == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003765 /* all we need to save for IPC$ connection */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003766 ses->ipc_tid = smb_buffer_response->Tid;
3767 }
3768
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +00003769 cifs_buf_release(smb_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003770 return rc;
3771}
3772
Al Viro2e32cf52013-10-03 12:53:37 -04003773static void delayed_free(struct rcu_head *p)
3774{
3775 struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu);
3776 unload_nls(sbi->local_nls);
3777 kfree(sbi);
3778}
3779
Al Viro2a9b9952011-06-17 09:27:16 -04003780void
3781cifs_umount(struct cifs_sb_info *cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003782{
Jeff Laytonb647c352010-10-28 11:16:44 -04003783 struct rb_root *root = &cifs_sb->tlink_tree;
3784 struct rb_node *node;
3785 struct tcon_link *tlink;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003786
Jeff Layton2de970f2010-10-06 19:51:12 -04003787 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3788
Jeff Laytonb647c352010-10-28 11:16:44 -04003789 spin_lock(&cifs_sb->tlink_tree_lock);
3790 while ((node = rb_first(root))) {
3791 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3792 cifs_get_tlink(tlink);
3793 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3794 rb_erase(node, root);
Steve French50c2f752007-07-13 00:33:32 +00003795
Jeff Laytonb647c352010-10-28 11:16:44 -04003796 spin_unlock(&cifs_sb->tlink_tree_lock);
3797 cifs_put_tlink(tlink);
3798 spin_lock(&cifs_sb->tlink_tree_lock);
3799 }
3800 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003801
Al Virodd854462011-06-17 08:24:42 -04003802 bdi_destroy(&cifs_sb->bdi);
Al Virod757d712011-06-17 09:42:43 -04003803 kfree(cifs_sb->mountdata);
Al Viro2e32cf52013-10-03 12:53:37 -04003804 call_rcu(&cifs_sb->rcu, delayed_free);
Steve French50c2f752007-07-13 00:33:32 +00003805}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003806
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003807int
3808cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003809{
3810 int rc = 0;
Jeff Layton198b5682010-04-24 07:57:48 -04003811 struct TCP_Server_Info *server = ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003812
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003813 if (!server->ops->need_neg || !server->ops->negotiate)
3814 return -ENOSYS;
3815
Jeff Layton198b5682010-04-24 07:57:48 -04003816 /* only send once per connect */
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003817 if (!server->ops->need_neg(server))
Jeff Layton198b5682010-04-24 07:57:48 -04003818 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003819
Pavel Shilovsky45275782012-05-17 17:53:29 +04003820 set_credits(server, 1);
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003821
3822 rc = server->ops->negotiate(xid, ses);
Jeff Layton198b5682010-04-24 07:57:48 -04003823 if (rc == 0) {
3824 spin_lock(&GlobalMid_Lock);
Jeff Layton7fdbaa12011-06-10 16:14:57 -04003825 if (server->tcpStatus == CifsNeedNegotiate)
Jeff Layton198b5682010-04-24 07:57:48 -04003826 server->tcpStatus = CifsGood;
3827 else
3828 rc = -EHOSTDOWN;
3829 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003830 }
Steve French26b994f2008-08-06 05:11:33 +00003831
Jeff Layton198b5682010-04-24 07:57:48 -04003832 return rc;
3833}
Steve French26b994f2008-08-06 05:11:33 +00003834
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003835int
3836cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3837 struct nls_table *nls_info)
Jeff Layton198b5682010-04-24 07:57:48 -04003838{
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003839 int rc = -ENOSYS;
Jeff Layton198b5682010-04-24 07:57:48 -04003840 struct TCP_Server_Info *server = ses->server;
3841
Jeff Layton198b5682010-04-24 07:57:48 -04003842 ses->capabilities = server->capabilities;
Steve French26b994f2008-08-06 05:11:33 +00003843 if (linuxExtEnabled == 0)
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003844 ses->capabilities &= (~server->vals->cap_unix);
Steve French20418ac2009-04-30 16:13:32 +00003845
Joe Perchesf96637b2013-05-04 22:12:25 -05003846 cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
Steve French96daf2b2011-05-27 04:34:02 +00003847 server->sec_mode, server->capabilities, server->timeAdj);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04003848
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003849 if (server->ops->sess_setup)
3850 rc = server->ops->sess_setup(xid, ses, nls_info);
3851
Shirish Pargaonkard4e63bd2013-08-29 08:35:09 -05003852 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -05003853 cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003854
Linus Torvalds1da177e2005-04-16 15:20:36 -07003855 return rc;
3856}
3857
Jeff Layton8a8798a2012-01-17 16:09:15 -05003858static int
3859cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3860{
Jeff Layton3f618222013-06-12 19:52:14 -05003861 vol->sectype = ses->sectype;
3862
3863 /* krb5 is special, since we don't need username or pw */
3864 if (vol->sectype == Kerberos)
Jeff Layton8a8798a2012-01-17 16:09:15 -05003865 return 0;
Jeff Layton8a8798a2012-01-17 16:09:15 -05003866
3867 return cifs_set_cifscreds(vol, ses);
3868}
3869
Steve French96daf2b2011-05-27 04:34:02 +00003870static struct cifs_tcon *
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003871cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
Jeff Layton9d002df2010-10-06 19:51:11 -04003872{
Jeff Layton8a8798a2012-01-17 16:09:15 -05003873 int rc;
Steve French96daf2b2011-05-27 04:34:02 +00003874 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3875 struct cifs_ses *ses;
3876 struct cifs_tcon *tcon = NULL;
Jeff Layton9d002df2010-10-06 19:51:11 -04003877 struct smb_vol *vol_info;
Jeff Layton9d002df2010-10-06 19:51:11 -04003878
3879 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
Dan Carpenter803ab972012-01-24 11:39:22 +03003880 if (vol_info == NULL)
3881 return ERR_PTR(-ENOMEM);
Jeff Layton9d002df2010-10-06 19:51:11 -04003882
Jeff Layton9d002df2010-10-06 19:51:11 -04003883 vol_info->local_nls = cifs_sb->local_nls;
3884 vol_info->linux_uid = fsuid;
3885 vol_info->cred_uid = fsuid;
3886 vol_info->UNC = master_tcon->treeName;
3887 vol_info->retry = master_tcon->retry;
3888 vol_info->nocase = master_tcon->nocase;
3889 vol_info->local_lease = master_tcon->local_lease;
3890 vol_info->no_linux_ext = !master_tcon->unix_ext;
Jeff Layton28e11bd2013-05-26 07:01:00 -04003891 vol_info->sectype = master_tcon->ses->sectype;
3892 vol_info->sign = master_tcon->ses->sign;
Jeff Layton9d002df2010-10-06 19:51:11 -04003893
Jeff Layton8a8798a2012-01-17 16:09:15 -05003894 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3895 if (rc) {
3896 tcon = ERR_PTR(rc);
3897 goto out;
3898 }
Jeff Layton9d002df2010-10-06 19:51:11 -04003899
3900 /* get a reference for the same TCP session */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303901 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003902 ++master_tcon->ses->server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303903 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003904
3905 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3906 if (IS_ERR(ses)) {
Steve French96daf2b2011-05-27 04:34:02 +00003907 tcon = (struct cifs_tcon *)ses;
Jeff Layton9d002df2010-10-06 19:51:11 -04003908 cifs_put_tcp_session(master_tcon->ses->server);
3909 goto out;
3910 }
3911
3912 tcon = cifs_get_tcon(ses, vol_info);
3913 if (IS_ERR(tcon)) {
3914 cifs_put_smb_ses(ses);
3915 goto out;
3916 }
3917
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003918 if (cap_unix(ses))
Jeff Layton9d002df2010-10-06 19:51:11 -04003919 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3920out:
Jeff Layton8a8798a2012-01-17 16:09:15 -05003921 kfree(vol_info->username);
3922 kfree(vol_info->password);
Jeff Layton9d002df2010-10-06 19:51:11 -04003923 kfree(vol_info);
3924
3925 return tcon;
3926}
3927
Steve French96daf2b2011-05-27 04:34:02 +00003928struct cifs_tcon *
Jeff Layton9d002df2010-10-06 19:51:11 -04003929cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3930{
3931 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3932}
3933
3934static int
3935cifs_sb_tcon_pending_wait(void *unused)
3936{
3937 schedule();
3938 return signal_pending(current) ? -ERESTARTSYS : 0;
3939}
3940
Jeff Laytonb647c352010-10-28 11:16:44 -04003941/* find and return a tlink with given uid */
3942static struct tcon_link *
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003943tlink_rb_search(struct rb_root *root, kuid_t uid)
Jeff Laytonb647c352010-10-28 11:16:44 -04003944{
3945 struct rb_node *node = root->rb_node;
3946 struct tcon_link *tlink;
3947
3948 while (node) {
3949 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3950
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003951 if (uid_gt(tlink->tl_uid, uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003952 node = node->rb_left;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003953 else if (uid_lt(tlink->tl_uid, uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003954 node = node->rb_right;
3955 else
3956 return tlink;
3957 }
3958 return NULL;
3959}
3960
3961/* insert a tcon_link into the tree */
3962static void
3963tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3964{
3965 struct rb_node **new = &(root->rb_node), *parent = NULL;
3966 struct tcon_link *tlink;
3967
3968 while (*new) {
3969 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3970 parent = *new;
3971
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003972 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003973 new = &((*new)->rb_left);
3974 else
3975 new = &((*new)->rb_right);
3976 }
3977
3978 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3979 rb_insert_color(&new_tlink->tl_rbnode, root);
3980}
3981
Jeff Layton9d002df2010-10-06 19:51:11 -04003982/*
3983 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3984 * current task.
3985 *
3986 * If the superblock doesn't refer to a multiuser mount, then just return
3987 * the master tcon for the mount.
3988 *
Suresh Jayaraman6ef933a2010-11-03 10:53:49 +05303989 * First, search the rbtree for an existing tcon for this fsuid. If one
Jeff Layton9d002df2010-10-06 19:51:11 -04003990 * exists, then check to see if it's pending construction. If it is then wait
3991 * for construction to complete. Once it's no longer pending, check to see if
3992 * it failed and either return an error or retry construction, depending on
3993 * the timeout.
3994 *
3995 * If one doesn't exist then insert a new tcon_link struct into the tree and
3996 * try to construct a new one.
3997 */
3998struct tcon_link *
3999cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4000{
4001 int ret;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08004002 kuid_t fsuid = current_fsuid();
Jeff Layton9d002df2010-10-06 19:51:11 -04004003 struct tcon_link *tlink, *newtlink;
4004
4005 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4006 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4007
4008 spin_lock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04004009 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04004010 if (tlink)
4011 cifs_get_tlink(tlink);
4012 spin_unlock(&cifs_sb->tlink_tree_lock);
4013
4014 if (tlink == NULL) {
4015 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4016 if (newtlink == NULL)
4017 return ERR_PTR(-ENOMEM);
Jeff Laytonb647c352010-10-28 11:16:44 -04004018 newtlink->tl_uid = fsuid;
Jeff Layton9d002df2010-10-06 19:51:11 -04004019 newtlink->tl_tcon = ERR_PTR(-EACCES);
4020 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4021 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4022 cifs_get_tlink(newtlink);
4023
Jeff Layton9d002df2010-10-06 19:51:11 -04004024 spin_lock(&cifs_sb->tlink_tree_lock);
4025 /* was one inserted after previous search? */
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);
Jeff Layton9d002df2010-10-06 19:51:11 -04004030 kfree(newtlink);
4031 goto wait_for_construction;
4032 }
Jeff Layton9d002df2010-10-06 19:51:11 -04004033 tlink = newtlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04004034 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4035 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04004036 } else {
4037wait_for_construction:
4038 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4039 cifs_sb_tcon_pending_wait,
4040 TASK_INTERRUPTIBLE);
4041 if (ret) {
4042 cifs_put_tlink(tlink);
4043 return ERR_PTR(ret);
4044 }
4045
4046 /* if it's good, return it */
4047 if (!IS_ERR(tlink->tl_tcon))
4048 return tlink;
4049
4050 /* return error if we tried this already recently */
4051 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4052 cifs_put_tlink(tlink);
4053 return ERR_PTR(-EACCES);
4054 }
4055
4056 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4057 goto wait_for_construction;
4058 }
4059
4060 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4061 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4062 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4063
4064 if (IS_ERR(tlink->tl_tcon)) {
4065 cifs_put_tlink(tlink);
4066 return ERR_PTR(-EACCES);
4067 }
4068
4069 return tlink;
4070}
Jeff Layton2de970f2010-10-06 19:51:12 -04004071
4072/*
4073 * periodic workqueue job that scans tcon_tree for a superblock and closes
4074 * out tcons.
4075 */
4076static void
4077cifs_prune_tlinks(struct work_struct *work)
4078{
4079 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4080 prune_tlinks.work);
Jeff Laytonb647c352010-10-28 11:16:44 -04004081 struct rb_root *root = &cifs_sb->tlink_tree;
4082 struct rb_node *node = rb_first(root);
4083 struct rb_node *tmp;
4084 struct tcon_link *tlink;
Jeff Layton2de970f2010-10-06 19:51:12 -04004085
Jeff Laytonb647c352010-10-28 11:16:44 -04004086 /*
4087 * Because we drop the spinlock in the loop in order to put the tlink
4088 * it's not guarded against removal of links from the tree. The only
4089 * places that remove entries from the tree are this function and
4090 * umounts. Because this function is non-reentrant and is canceled
4091 * before umount can proceed, this is safe.
4092 */
4093 spin_lock(&cifs_sb->tlink_tree_lock);
4094 node = rb_first(root);
4095 while (node != NULL) {
4096 tmp = node;
4097 node = rb_next(tmp);
4098 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4099
4100 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4101 atomic_read(&tlink->tl_count) != 0 ||
4102 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4103 continue;
4104
4105 cifs_get_tlink(tlink);
4106 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4107 rb_erase(tmp, root);
4108
Jeff Layton2de970f2010-10-06 19:51:12 -04004109 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04004110 cifs_put_tlink(tlink);
4111 spin_lock(&cifs_sb->tlink_tree_lock);
4112 }
4113 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton2de970f2010-10-06 19:51:12 -04004114
Jeff Laytonda472fc2012-03-23 14:40:53 -04004115 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
Jeff Layton2de970f2010-10-06 19:51:12 -04004116 TLINK_IDLE_EXPIRE);
4117}