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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 */
382 rc = generic_ip_connect(server);
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000383 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500384 cifs_dbg(FYI, "reconnect error %d\n", rc);
Steve French0cb766a2005-04-28 22:41:11 -0700385 msleep(3000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 } else {
387 atomic_inc(&tcpSesReconnectCount);
388 spin_lock(&GlobalMid_Lock);
Jeff Layton469ee612008-10-16 18:46:39 +0000389 if (server->tcpStatus != CifsExiting)
Steve Frenchfd88ce92011-04-12 01:01:14 +0000390 server->tcpStatus = CifsNeedNegotiate;
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000391 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 }
Jeff Layton7fdbaa12011-06-10 16:14:57 -0400393 } while (server->tcpStatus == CifsNeedReconnect);
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 return rc;
396}
397
Jeff Laytonc74093b2011-01-11 07:24:23 -0500398static void
399cifs_echo_request(struct work_struct *work)
400{
401 int rc;
402 struct TCP_Server_Info *server = container_of(work,
403 struct TCP_Server_Info, echo.work);
404
Jeff Layton247ec9b2011-02-04 17:09:50 -0500405 /*
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400406 * We cannot send an echo if it is disabled or until the
407 * NEGOTIATE_PROTOCOL request is done, which is indicated by
408 * server->ops->need_neg() == true. Also, no need to ping if
409 * we got a response recently.
Jeff Layton247ec9b2011-02-04 17:09:50 -0500410 */
Pavel Shilovsky286170a2012-05-25 10:43:58 +0400411 if (!server->ops->need_neg || server->ops->need_neg(server) ||
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400412 (server->ops->can_echo && !server->ops->can_echo(server)) ||
Jeff Layton247ec9b2011-02-04 17:09:50 -0500413 time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ))
Jeff Laytonc74093b2011-01-11 07:24:23 -0500414 goto requeue_echo;
415
Pavel Shilovskyf6d76172012-05-25 14:47:16 +0400416 rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS;
Jeff Laytonc74093b2011-01-11 07:24:23 -0500417 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -0500418 cifs_dbg(FYI, "Unable to send echo request to server: %s\n",
419 server->hostname);
Jeff Laytonc74093b2011-01-11 07:24:23 -0500420
421requeue_echo:
Jeff Laytonda472fc2012-03-23 14:40:53 -0400422 queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL);
Jeff Laytonc74093b2011-01-11 07:24:23 -0500423}
424
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400425static bool
Jeff Layton2a37ef92011-10-19 15:29:23 -0400426allocate_buffers(struct TCP_Server_Info *server)
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400427{
Jeff Layton2a37ef92011-10-19 15:29:23 -0400428 if (!server->bigbuf) {
429 server->bigbuf = (char *)cifs_buf_get();
430 if (!server->bigbuf) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500431 cifs_dbg(VFS, "No memory for large SMB response\n");
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400432 msleep(3000);
433 /* retry will check if exiting */
434 return false;
435 }
Jeff Layton2a37ef92011-10-19 15:29:23 -0400436 } else if (server->large_buf) {
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400437 /* we are reusing a dirty large buf, clear its start */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400438 memset(server->bigbuf, 0, HEADER_SIZE(server));
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400439 }
440
Jeff Layton2a37ef92011-10-19 15:29:23 -0400441 if (!server->smallbuf) {
442 server->smallbuf = (char *)cifs_small_buf_get();
443 if (!server->smallbuf) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500444 cifs_dbg(VFS, "No memory for SMB response\n");
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400445 msleep(1000);
446 /* retry will check if exiting */
447 return false;
448 }
449 /* beginning of smb buffer is cleared in our buf_get */
450 } else {
451 /* if existing small buf clear beginning */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400452 memset(server->smallbuf, 0, HEADER_SIZE(server));
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400453 }
454
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400455 return true;
456}
457
Jeff Laytonba749e62011-10-11 06:41:32 -0400458static bool
459server_unresponsive(struct TCP_Server_Info *server)
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400460{
Pavel Shilovsky6dae51a2012-02-21 16:50:23 +0300461 /*
462 * We need to wait 2 echo intervals to make sure we handle such
463 * situations right:
464 * 1s client sends a normal SMB request
465 * 2s client gets a response
466 * 30s echo workqueue job pops, and decides we got a response recently
467 * and don't need to send another
468 * ...
469 * 65s kernel_recvmsg times out, and we see that we haven't gotten
470 * a response in >60s.
471 */
472 if (server->tcpStatus == CifsGood &&
473 time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500474 cifs_dbg(VFS, "Server %s has not responded in %d seconds. Reconnecting...\n",
475 server->hostname, (2 * SMB_ECHO_INTERVAL) / HZ);
Jeff Laytonba749e62011-10-11 06:41:32 -0400476 cifs_reconnect(server);
477 wake_up(&server->response_q);
478 return true;
479 }
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400480
Jeff Laytonba749e62011-10-11 06:41:32 -0400481 return false;
482}
483
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400484/*
485 * kvec_array_init - clone a kvec array, and advance into it
486 * @new: pointer to memory for cloned array
487 * @iov: pointer to original array
488 * @nr_segs: number of members in original array
489 * @bytes: number of bytes to advance into the cloned array
490 *
491 * This function will copy the array provided in iov to a section of memory
492 * and advance the specified number of bytes into the new array. It returns
493 * the number of segments in the new array. "new" must be at least as big as
494 * the original iov array.
495 */
496static unsigned int
497kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs,
498 size_t bytes)
499{
500 size_t base = 0;
501
502 while (bytes || !iov->iov_len) {
503 int copy = min(bytes, iov->iov_len);
504
505 bytes -= copy;
506 base += copy;
507 if (iov->iov_len == base) {
508 iov++;
509 nr_segs--;
510 base = 0;
511 }
512 }
513 memcpy(new, iov, sizeof(*iov) * nr_segs);
514 new->iov_base += base;
515 new->iov_len -= base;
516 return nr_segs;
517}
518
Jeff Layton1041e3f2011-10-19 15:28:27 -0400519static struct kvec *
520get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs)
521{
522 struct kvec *new_iov;
523
524 if (server->iov && nr_segs <= server->nr_iov)
525 return server->iov;
526
527 /* not big enough -- allocate a new one and release the old */
528 new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS);
529 if (new_iov) {
530 kfree(server->iov);
531 server->iov = new_iov;
532 server->nr_iov = nr_segs;
533 }
534 return new_iov;
535}
536
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400537int
538cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig,
539 unsigned int nr_segs, unsigned int to_read)
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400540{
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400541 int length = 0;
542 int total_read;
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400543 unsigned int segs;
Jeff Laytone831e6c2011-10-11 06:41:32 -0400544 struct msghdr smb_msg;
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400545 struct kvec *iov;
546
Jeff Layton1041e3f2011-10-19 15:28:27 -0400547 iov = get_server_iovec(server, nr_segs);
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400548 if (!iov)
549 return -ENOMEM;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400550
Jeff Laytone831e6c2011-10-11 06:41:32 -0400551 smb_msg.msg_control = NULL;
552 smb_msg.msg_controllen = 0;
553
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400554 for (total_read = 0; to_read; total_read += length, to_read -= length) {
Jeff Layton95edcff2011-12-01 20:22:41 -0500555 try_to_freeze();
556
Jeff Laytonba749e62011-10-11 06:41:32 -0400557 if (server_unresponsive(server)) {
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400558 total_read = -EAGAIN;
Jeff Laytonba749e62011-10-11 06:41:32 -0400559 break;
560 }
561
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400562 segs = kvec_array_init(iov, iov_orig, nr_segs, total_read);
563
564 length = kernel_recvmsg(server->ssocket, &smb_msg,
565 iov, segs, to_read, 0);
566
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400567 if (server->tcpStatus == CifsExiting) {
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400568 total_read = -ESHUTDOWN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400569 break;
570 } else if (server->tcpStatus == CifsNeedReconnect) {
571 cifs_reconnect(server);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400572 total_read = -EAGAIN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400573 break;
574 } else if (length == -ERESTARTSYS ||
575 length == -EAGAIN ||
576 length == -EINTR) {
577 /*
578 * Minimum sleep to prevent looping, allowing socket
579 * to clear and app threads to set tcpStatus
580 * CifsNeedReconnect if server hung.
581 */
582 usleep_range(1000, 2000);
583 length = 0;
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400584 continue;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400585 } else if (length <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500586 cifs_dbg(FYI, "Received no data or error: expecting %d\n"
587 "got %d", to_read, length);
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400588 cifs_reconnect(server);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400589 total_read = -EAGAIN;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400590 break;
591 }
592 }
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400593 return total_read;
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400594}
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400595
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400596int
597cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
598 unsigned int to_read)
Jeff Layton42c4dfc2011-10-19 15:28:17 -0400599{
600 struct kvec iov;
601
602 iov.iov_base = buf;
603 iov.iov_len = to_read;
604
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400605 return cifs_readv_from_socket(server, &iov, 1, to_read);
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400606}
607
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400608static bool
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400609is_smb_response(struct TCP_Server_Info *server, unsigned char type)
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400610{
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400611 /*
612 * The first byte big endian of the length field,
613 * is actually not part of the length but the type
614 * with the most common, zero, as regular data.
615 */
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400616 switch (type) {
617 case RFC1002_SESSION_MESSAGE:
618 /* Regular SMB response */
619 return true;
620 case RFC1002_SESSION_KEEP_ALIVE:
Joe Perchesf96637b2013-05-04 22:12:25 -0500621 cifs_dbg(FYI, "RFC 1002 session keep alive\n");
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400622 break;
623 case RFC1002_POSITIVE_SESSION_RESPONSE:
Joe Perchesf96637b2013-05-04 22:12:25 -0500624 cifs_dbg(FYI, "RFC 1002 positive session response\n");
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400625 break;
626 case RFC1002_NEGATIVE_SESSION_RESPONSE:
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400627 /*
628 * We get this from Windows 98 instead of an error on
629 * SMB negprot response.
630 */
Joe Perchesf96637b2013-05-04 22:12:25 -0500631 cifs_dbg(FYI, "RFC 1002 negative session response\n");
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400632 /* give server a second to clean up */
633 msleep(1000);
634 /*
635 * Always try 445 first on reconnect since we get NACK
636 * on some if we ever connected to port 139 (the NACK
637 * is since we do not begin with RFC1001 session
638 * initialize frame).
639 */
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400640 cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400641 cifs_reconnect(server);
642 wake_up(&server->response_q);
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400643 break;
644 default:
Joe Perchesf96637b2013-05-04 22:12:25 -0500645 cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400646 cifs_reconnect(server);
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400647 }
648
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400649 return false;
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400650}
651
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400652void
653dequeue_mid(struct mid_q_entry *mid, bool malformed)
Jeff Laytonea1f4502011-10-19 15:29:05 -0400654{
655#ifdef CONFIG_CIFS_STATS2
656 mid->when_received = jiffies;
657#endif
658 spin_lock(&GlobalMid_Lock);
659 if (!malformed)
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400660 mid->mid_state = MID_RESPONSE_RECEIVED;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400661 else
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400662 mid->mid_state = MID_RESPONSE_MALFORMED;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400663 list_del_init(&mid->qhead);
664 spin_unlock(&GlobalMid_Lock);
665}
666
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400667static void
668handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server,
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400669 char *buf, int malformed)
Jeff Laytonea1f4502011-10-19 15:29:05 -0400670{
Pavel Shilovsky316cf942012-05-23 14:31:03 +0400671 if (server->ops->check_trans2 &&
672 server->ops->check_trans2(mid, server, buf, malformed))
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400673 return;
Jeff Laytonea1f4502011-10-19 15:29:05 -0400674 mid->resp_buf = buf;
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400675 mid->large_buf = server->large_buf;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400676 /* Was previous buf put in mpx struct for multi-rsp? */
677 if (!mid->multiRsp) {
678 /* smb buffer will be freed by user thread */
679 if (server->large_buf)
680 server->bigbuf = NULL;
681 else
682 server->smallbuf = NULL;
683 }
Jeff Laytonffc00e22011-10-19 15:29:13 -0400684 dequeue_mid(mid, malformed);
Pavel Shilovskyad69bae2011-08-01 13:19:43 +0400685}
686
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400687static void clean_demultiplex_info(struct TCP_Server_Info *server)
688{
689 int length;
690
691 /* take it off the list, if it's not already */
692 spin_lock(&cifs_tcp_ses_lock);
693 list_del_init(&server->tcp_ses_list);
694 spin_unlock(&cifs_tcp_ses_lock);
695
696 spin_lock(&GlobalMid_Lock);
697 server->tcpStatus = CifsExiting;
698 spin_unlock(&GlobalMid_Lock);
699 wake_up_all(&server->response_q);
700
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400701 /* check if we have blocked requests that need to free */
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300702 spin_lock(&server->req_lock);
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +0400703 if (server->credits <= 0)
704 server->credits = 1;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +0300705 spin_unlock(&server->req_lock);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400706 /*
707 * Although there should not be any requests blocked on this queue it
708 * can not hurt to be paranoid and try to wake up requests that may
709 * haven been blocked when more than 50 at time were on the wire to the
710 * same server - they now will see the session is in exit state and get
711 * out of SendReceive.
712 */
713 wake_up_all(&server->request_q);
714 /* give those requests time to exit */
715 msleep(125);
716
717 if (server->ssocket) {
718 sock_release(server->ssocket);
719 server->ssocket = NULL;
720 }
721
722 if (!list_empty(&server->pending_mid_q)) {
723 struct list_head dispose_list;
724 struct mid_q_entry *mid_entry;
725 struct list_head *tmp, *tmp2;
726
727 INIT_LIST_HEAD(&dispose_list);
728 spin_lock(&GlobalMid_Lock);
729 list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
730 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Joe Perchesf96637b2013-05-04 22:12:25 -0500731 cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid);
Pavel Shilovsky7c9421e2012-03-23 14:28:03 -0400732 mid_entry->mid_state = MID_SHUTDOWN;
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400733 list_move(&mid_entry->qhead, &dispose_list);
734 }
735 spin_unlock(&GlobalMid_Lock);
736
737 /* now walk dispose list and issue callbacks */
738 list_for_each_safe(tmp, tmp2, &dispose_list) {
739 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
Joe Perchesf96637b2013-05-04 22:12:25 -0500740 cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400741 list_del_init(&mid_entry->qhead);
742 mid_entry->callback(mid_entry);
743 }
744 /* 1/8th of sec is more than enough time for them to exit */
745 msleep(125);
746 }
747
748 if (!list_empty(&server->pending_mid_q)) {
749 /*
750 * mpx threads have not exited yet give them at least the smb
751 * send timeout time for long ops.
752 *
753 * Due to delays on oplock break requests, we need to wait at
754 * least 45 seconds before giving up on a request getting a
755 * response and going ahead and killing cifsd.
756 */
Joe Perchesf96637b2013-05-04 22:12:25 -0500757 cifs_dbg(FYI, "Wait for exit from demultiplex thread\n");
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400758 msleep(46000);
759 /*
760 * If threads still have not exited they are probably never
761 * coming home not much else we can do but free the memory.
762 */
763 }
764
765 kfree(server->hostname);
Jeff Layton1041e3f2011-10-19 15:28:27 -0400766 kfree(server->iov);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400767 kfree(server);
768
769 length = atomic_dec_return(&tcpSesAllocCount);
770 if (length > 0)
771 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
772 GFP_KERNEL);
773}
774
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400775static int
Jeff Laytone9097ab2011-10-19 15:29:40 -0400776standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid)
777{
778 int length;
779 char *buf = server->smallbuf;
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400780 unsigned int pdu_length = get_rfc1002_length(buf);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400781
782 /* make sure this will fit in a large buffer */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400783 if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500784 cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400785 cifs_reconnect(server);
786 wake_up(&server->response_q);
787 return -EAGAIN;
788 }
789
790 /* switch to large buffer if too big for a small one */
791 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
792 server->large_buf = true;
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400793 memcpy(server->bigbuf, buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400794 buf = server->bigbuf;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400795 }
796
797 /* now read the rest */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400798 length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1,
799 pdu_length - HEADER_SIZE(server) + 1 + 4);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400800 if (length < 0)
801 return length;
802 server->total_read += length;
803
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400804 dump_smb(buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400805
806 /*
807 * We know that we received enough to get to the MID as we
808 * checked the pdu_length earlier. Now check to see
809 * if the rest of the header is OK. We borrow the length
810 * var for the rest of the loop to avoid a new stack var.
811 *
812 * 48 bytes is enough to display the header and a little bit
813 * into the payload for debugging purposes.
814 */
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400815 length = server->ops->check_message(buf, server->total_read);
Jeff Laytone9097ab2011-10-19 15:29:40 -0400816 if (length != 0)
817 cifs_dump_mem("Bad SMB: ", buf,
818 min_t(unsigned int, server->total_read, 48));
819
Pavel Shilovsky2e44b282012-09-18 16:20:33 -0700820 if (server->ops->is_status_pending &&
821 server->ops->is_status_pending(buf, server, length))
822 return -1;
823
Jeff Laytonff4fa4a2012-02-07 06:31:05 -0500824 if (!mid)
825 return length;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400826
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400827 handle_mid(mid, server, buf, length);
Jeff Laytonff4fa4a2012-02-07 06:31:05 -0500828 return 0;
Jeff Laytone9097ab2011-10-19 15:29:40 -0400829}
830
831static int
Al Viro7c97c202011-06-21 08:51:28 -0400832cifs_demultiplex_thread(void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833{
834 int length;
Al Viro7c97c202011-06-21 08:51:28 -0400835 struct TCP_Server_Info *server = p;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400836 unsigned int pdu_length;
837 char *buf = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 struct task_struct *task_to_wake = NULL;
839 struct mid_q_entry *mid_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 current->flags |= PF_MEMALLOC;
Joe Perchesf96637b2013-05-04 22:12:25 -0500842 cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current));
Jeff Layton93d0ec82008-08-02 08:00:48 -0400843
844 length = atomic_inc_return(&tcpSesAllocCount);
845 if (length > 1)
Steve French26f57362007-08-30 22:09:15 +0000846 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
847 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Rafael J. Wysocki83144182007-07-17 04:03:35 -0700849 set_freezable();
Jeff Layton469ee612008-10-16 18:46:39 +0000850 while (server->tcpStatus != CifsExiting) {
Steve Frenchede13272005-08-30 20:10:14 -0700851 if (try_to_freeze())
852 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700853
Jeff Layton2a37ef92011-10-19 15:29:23 -0400854 if (!allocate_buffers(server))
Pavel Shilovsky3d9c2472011-08-01 13:19:40 +0400855 continue;
Steve Frenchb8643e12005-04-28 22:41:07 -0700856
Jeff Layton2a37ef92011-10-19 15:29:23 -0400857 server->large_buf = false;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400858 buf = server->smallbuf;
Steve Frenchf01d5e12007-08-30 21:13:31 +0000859 pdu_length = 4; /* enough to get RFC1001 header */
Steve Frenchfda35942011-01-20 18:06:34 +0000860
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400861 length = cifs_read_from_socket(server, buf, pdu_length);
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400862 if (length < 0)
Steve Frenchfda35942011-01-20 18:06:34 +0000863 continue;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400864 server->total_read = length;
Steve French67010fb2005-04-28 22:41:09 -0700865
Pavel Shilovsky98bac622011-08-01 13:19:42 +0400866 /*
867 * The right amount was read from socket - 4 bytes,
868 * so we can now interpret the length field.
869 */
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400870 pdu_length = get_rfc1002_length(buf);
Steve French46810cb2005-04-28 22:41:09 -0700871
Joe Perchesf96637b2013-05-04 22:12:25 -0500872 cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
Jeff Laytonfe11e4c2011-10-11 06:41:32 -0400873 if (!is_smb_response(server, buf[0]))
Steve Frenchfb8c4b12007-07-10 01:16:18 +0000874 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700875
Jeff Layton89482a52011-10-19 15:28:57 -0400876 /* make sure we have enough to get to the MID */
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400877 if (pdu_length < HEADER_SIZE(server) - 1 - 4) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500878 cifs_dbg(VFS, "SMB response too short (%u bytes)\n",
879 pdu_length);
Jeff Layton89482a52011-10-19 15:28:57 -0400880 cifs_reconnect(server);
881 wake_up(&server->response_q);
882 continue;
Steve Frenche4eb2952005-04-28 22:41:09 -0700883 }
Pavel Shilovskye7015fb2011-08-01 13:19:41 +0400884
Jeff Layton89482a52011-10-19 15:28:57 -0400885 /* read down to the MID */
Jeff Laytone28bc5b2011-10-19 15:30:07 -0400886 length = cifs_read_from_socket(server, buf + 4,
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400887 HEADER_SIZE(server) - 1 - 4);
Jeff Layton89482a52011-10-19 15:28:57 -0400888 if (length < 0)
889 continue;
Jeff Layton2a37ef92011-10-19 15:29:23 -0400890 server->total_read += length;
Jeff Layton89482a52011-10-19 15:28:57 -0400891
Pavel Shilovsky8aa26f32012-05-17 13:25:35 +0400892 mid_entry = server->ops->find_mid(server, buf);
Jeff Laytonc8054eb2011-10-19 15:29:31 -0400893
Jeff Layton44d22d82011-10-19 15:29:49 -0400894 if (!mid_entry || !mid_entry->receive)
895 length = standard_receive3(server, mid_entry);
896 else
897 length = mid_entry->receive(server, mid_entry);
898
Jeff Laytona52c1eb2011-10-11 06:41:32 -0400899 if (length < 0)
Steve Frenche4eb2952005-04-28 22:41:09 -0700900 continue;
901
Pavel Shilovskyd4e48542012-03-23 14:28:02 -0400902 if (server->large_buf)
Jeff Laytone9097ab2011-10-19 15:29:40 -0400903 buf = server->bigbuf;
Steve Frenche4eb2952005-04-28 22:41:09 -0700904
Steve Frenchfda35942011-01-20 18:06:34 +0000905 server->lstrp = jiffies;
Jeff Layton2b84a36c2011-01-11 07:24:21 -0500906 if (mid_entry != NULL) {
Jeff Layton2a37ef92011-10-19 15:29:23 -0400907 if (!mid_entry->multiRsp || mid_entry->multiEnd)
908 mid_entry->callback(mid_entry);
Pavel Shilovsky7f0adb52012-05-28 15:50:10 +0400909 } else if (!server->ops->is_oplock_break ||
910 !server->ops->is_oplock_break(buf, server)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500911 cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n",
912 atomic_read(&midCount));
Pavel Shilovsky1887f602012-05-17 12:45:31 +0400913 cifs_dump_mem("Received Data is: ", buf,
914 HEADER_SIZE(server));
Steve French39798772006-05-31 22:40:51 +0000915#ifdef CONFIG_CIFS_DEBUG2
Pavel Shilovsky7f0adb52012-05-28 15:50:10 +0400916 if (server->ops->dump_detail)
917 server->ops->dump_detail(buf);
Steve French39798772006-05-31 22:40:51 +0000918 cifs_dump_mids(server);
919#endif /* CIFS_DEBUG2 */
Steve French50c2f752007-07-13 00:33:32 +0000920
Steve Frenche4eb2952005-04-28 22:41:09 -0700921 }
922 } /* end while !EXITING */
923
Justin P. Mattockfd62cb72011-02-24 22:15:02 -0800924 /* buffer usually freed in free_mid - need to free it here on exit */
Jeff Layton2a37ef92011-10-19 15:29:23 -0400925 cifs_buf_release(server->bigbuf);
926 if (server->smallbuf) /* no sense logging a debug message if NULL */
927 cifs_small_buf_release(server->smallbuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400929 task_to_wake = xchg(&server->tsk, NULL);
Pavel Shilovsky762dfd12011-08-01 13:19:44 +0400930 clean_demultiplex_info(server);
Steve French50c2f752007-07-13 00:33:32 +0000931
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -0400932 /* if server->tsk was NULL then wait for a signal before exiting */
933 if (!task_to_wake) {
934 set_current_state(TASK_INTERRUPTIBLE);
935 while (!signal_pending(current)) {
936 schedule();
937 set_current_state(TASK_INTERRUPTIBLE);
938 }
939 set_current_state(TASK_RUNNING);
940 }
941
Jeff Layton0468a2c2008-12-01 07:09:35 -0500942 module_put_and_exit(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943}
944
Jeff Laytonc359cf32007-11-16 22:22:06 +0000945/* extract the host portion of the UNC string */
946static char *
947extract_hostname(const char *unc)
948{
949 const char *src;
950 char *dst, *delim;
951 unsigned int len;
952
953 /* skip double chars at beginning of string */
954 /* BB: check validity of these bytes? */
955 src = unc + 2;
956
957 /* delimiter between hostname and sharename is always '\\' now */
958 delim = strchr(src, '\\');
959 if (!delim)
960 return ERR_PTR(-EINVAL);
961
962 len = delim - src;
963 dst = kmalloc((len + 1), GFP_KERNEL);
964 if (dst == NULL)
965 return ERR_PTR(-ENOMEM);
966
967 memcpy(dst, src, len);
968 dst[len] = '\0';
969
970 return dst;
971}
972
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400973static int get_option_ul(substring_t args[], unsigned long *option)
974{
975 int rc;
976 char *string;
977
978 string = match_strdup(args);
979 if (string == NULL)
980 return -ENOMEM;
Sachin Prabhubfa890a2012-04-13 14:04:32 +0100981 rc = kstrtoul(string, 0, option);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -0400982 kfree(string);
983
984 return rc;
985}
986
Eric W. Biederman3da46562013-02-06 01:37:39 -0800987static int get_option_uid(substring_t args[], kuid_t *result)
988{
989 unsigned long value;
990 kuid_t uid;
991 int rc;
992
993 rc = get_option_ul(args, &value);
994 if (rc)
995 return rc;
996
997 uid = make_kuid(current_user_ns(), value);
998 if (!uid_valid(uid))
999 return -EINVAL;
1000
1001 *result = uid;
1002 return 0;
1003}
1004
1005static int get_option_gid(substring_t args[], kgid_t *result)
1006{
1007 unsigned long value;
1008 kgid_t gid;
1009 int rc;
1010
1011 rc = get_option_ul(args, &value);
1012 if (rc)
1013 return rc;
1014
1015 gid = make_kgid(current_user_ns(), value);
1016 if (!gid_valid(gid))
1017 return -EINVAL;
1018
1019 *result = gid;
1020 return 0;
1021}
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001022
1023static int cifs_parse_security_flavors(char *value,
1024 struct smb_vol *vol)
1025{
1026
1027 substring_t args[MAX_OPT_ARGS];
1028
Jeff Layton1e3cc572013-06-10 17:12:23 -05001029 /*
1030 * With mount options, the last one should win. Reset any existing
1031 * settings back to default.
1032 */
1033 vol->sectype = Unspecified;
1034 vol->sign = false;
1035
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001036 switch (match_token(value, cifs_secflavor_tokens, args)) {
Jeff Layton3f618222013-06-12 19:52:14 -05001037 case Opt_sec_krb5p:
1038 cifs_dbg(VFS, "sec=krb5p is not supported!\n");
1039 return 1;
1040 case Opt_sec_krb5i:
1041 vol->sign = true;
1042 /* Fallthrough */
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001043 case Opt_sec_krb5:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001044 vol->sectype = Kerberos;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001045 break;
1046 case Opt_sec_ntlmsspi:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001047 vol->sign = true;
Jeff Layton3f618222013-06-12 19:52:14 -05001048 /* Fallthrough */
1049 case Opt_sec_ntlmssp:
1050 vol->sectype = RawNTLMSSP;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001051 break;
1052 case Opt_sec_ntlmi:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001053 vol->sign = true;
Jeff Layton3f618222013-06-12 19:52:14 -05001054 /* Fallthrough */
1055 case Opt_ntlm:
1056 vol->sectype = NTLM;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001057 break;
1058 case Opt_sec_ntlmv2i:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001059 vol->sign = true;
Jeff Layton3f618222013-06-12 19:52:14 -05001060 /* Fallthrough */
1061 case Opt_sec_ntlmv2:
1062 vol->sectype = NTLMv2;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001063 break;
1064#ifdef CONFIG_CIFS_WEAK_PW_HASH
1065 case Opt_sec_lanman:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001066 vol->sectype = LANMAN;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001067 break;
1068#endif
1069 case Opt_sec_none:
1070 vol->nullauth = 1;
1071 break;
1072 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001073 cifs_dbg(VFS, "bad security option: %s\n", value);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001074 return 1;
1075 }
1076
1077 return 0;
1078}
1079
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080static int
Jeff Layton15b6a472012-05-16 07:50:15 -04001081cifs_parse_cache_flavor(char *value, struct smb_vol *vol)
1082{
1083 substring_t args[MAX_OPT_ARGS];
1084
1085 switch (match_token(value, cifs_cacheflavor_tokens, args)) {
1086 case Opt_cache_loose:
1087 vol->direct_io = false;
1088 vol->strict_io = false;
1089 break;
1090 case Opt_cache_strict:
1091 vol->direct_io = false;
1092 vol->strict_io = true;
1093 break;
1094 case Opt_cache_none:
1095 vol->direct_io = true;
1096 vol->strict_io = false;
1097 break;
1098 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001099 cifs_dbg(VFS, "bad cache= option: %s\n", value);
Jeff Layton15b6a472012-05-16 07:50:15 -04001100 return 1;
1101 }
1102 return 0;
1103}
1104
1105static int
Jeff Layton23db65f2012-05-15 12:20:51 -04001106cifs_parse_smb_version(char *value, struct smb_vol *vol)
1107{
1108 substring_t args[MAX_OPT_ARGS];
1109
1110 switch (match_token(value, cifs_smb_version_tokens, args)) {
1111 case Smb_1:
1112 vol->ops = &smb1_operations;
1113 vol->vals = &smb1_values;
1114 break;
Steve French1080ef72011-02-24 18:07:19 +00001115#ifdef CONFIG_CIFS_SMB2
Steve Frenchdd446b12012-11-28 23:21:06 -06001116 case Smb_20:
1117 vol->ops = &smb21_operations; /* currently identical with 2.1 */
1118 vol->vals = &smb20_values;
1119 break;
Steve French1080ef72011-02-24 18:07:19 +00001120 case Smb_21:
1121 vol->ops = &smb21_operations;
1122 vol->vals = &smb21_values;
1123 break;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001124 case Smb_30:
Steve French38107d42012-12-08 22:08:06 -06001125 vol->ops = &smb30_operations;
Steve Frenche4aa25e2012-10-01 12:26:22 -05001126 vol->vals = &smb30_values;
1127 break;
Steve French20b6d8b2013-06-12 22:48:41 -05001128 case Smb_302:
1129 vol->ops = &smb30_operations; /* currently identical with 3.0 */
1130 vol->vals = &smb302_values;
1131 break;
Steve French1080ef72011-02-24 18:07:19 +00001132#endif
Jeff Layton23db65f2012-05-15 12:20:51 -04001133 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05001134 cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);
Jeff Layton23db65f2012-05-15 12:20:51 -04001135 return 1;
1136 }
1137 return 0;
1138}
1139
Jeff Laytond387a5c2012-12-10 06:10:46 -05001140/*
1141 * Parse a devname into substrings and populate the vol->UNC and vol->prepath
1142 * fields with the result. Returns 0 on success and an error otherwise.
1143 */
1144static int
1145cifs_parse_devname(const char *devname, struct smb_vol *vol)
1146{
1147 char *pos;
1148 const char *delims = "/\\";
1149 size_t len;
1150
1151 /* make sure we have a valid UNC double delimiter prefix */
1152 len = strspn(devname, delims);
1153 if (len != 2)
1154 return -EINVAL;
1155
1156 /* find delimiter between host and sharename */
1157 pos = strpbrk(devname + 2, delims);
1158 if (!pos)
1159 return -EINVAL;
1160
1161 /* skip past delimiter */
1162 ++pos;
1163
1164 /* now go until next delimiter or end of string */
1165 len = strcspn(pos, delims);
1166
1167 /* move "pos" up to delimiter or NULL */
1168 pos += len;
1169 vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL);
1170 if (!vol->UNC)
1171 return -ENOMEM;
1172
1173 convert_delimiter(vol->UNC, '\\');
1174
1175 /* If pos is NULL, or is a bogus trailing delimiter then no prepath */
1176 if (!*pos++ || !*pos)
1177 return 0;
1178
1179 vol->prepath = kstrdup(pos, GFP_KERNEL);
1180 if (!vol->prepath)
1181 return -ENOMEM;
1182
1183 return 0;
1184}
1185
Jeff Layton23db65f2012-05-15 12:20:51 -04001186static int
Sean Finneyb9468452011-04-11 13:19:32 +00001187cifs_parse_mount_options(const char *mountdata, const char *devname,
Steve French50c2f752007-07-13 00:33:32 +00001188 struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189{
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001190 char *data, *end;
Vasily Averin957df452011-06-06 11:33:12 +04001191 char *mountdata_copy = NULL, *options;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 unsigned int temp_len, i, j;
1193 char separator[2];
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001194 short int override_uid = -1;
1195 short int override_gid = -1;
1196 bool uid_specified = false;
1197 bool gid_specified = false;
Jeff Laytond8162552012-03-23 14:40:56 -04001198 bool sloppy = false;
1199 char *invalid = NULL;
Jeff Layton88463992010-11-22 15:31:03 -05001200 char *nodename = utsname()->nodename;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001201 char *string = NULL;
1202 char *tmp_end, *value;
1203 char delim;
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001204 bool got_ip = false;
1205 unsigned short port = 0;
1206 struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
1208 separator[0] = ',';
Steve French50c2f752007-07-13 00:33:32 +00001209 separator[1] = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001210 delim = separator[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211
Jeff Layton6ee95422012-11-26 11:09:57 -05001212 /* ensure we always start with zeroed-out smb_vol */
1213 memset(vol, 0, sizeof(*vol));
1214
Jeff Layton88463992010-11-22 15:31:03 -05001215 /*
1216 * does not have to be perfect mapping since field is
1217 * informational, only used for servers that do not support
1218 * port 445 and it can be overridden at mount time
1219 */
Jeff Layton1397f2e2011-01-07 11:30:28 -05001220 memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN);
1221 for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++)
Jeff Layton88463992010-11-22 15:31:03 -05001222 vol->source_rfc1001_name[i] = toupper(nodename[i]);
1223
Jeff Layton1397f2e2011-01-07 11:30:28 -05001224 vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0;
Steve Frencha10faeb22005-08-22 21:38:31 -07001225 /* null target name indicates to use *SMBSERVR default called name
1226 if we end up sending RFC1001 session initialize */
1227 vol->target_rfc1001_name[0] = 0;
Jeff Layton3e4b3e12010-07-19 18:00:17 -04001228 vol->cred_uid = current_uid();
1229 vol->linux_uid = current_uid();
David Howellsa001e5b2008-11-14 10:38:47 +11001230 vol->linux_gid = current_gid();
Jeff Laytonf55ed1a2009-05-26 16:28:11 -04001231
1232 /* default to only allowing write access to owner of the mount */
1233 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
1235 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
Jeremy Allisonac670552005-06-22 17:26:35 -07001236 /* default is always to request posix paths. */
1237 vol->posix_paths = 1;
Jeff Laytona0c92172009-05-27 15:40:47 -04001238 /* default to using server inode numbers where available */
1239 vol->server_ino = 1;
Jeremy Allisonac670552005-06-22 17:26:35 -07001240
Jeff Layton1b359202012-09-19 15:20:27 -07001241 /* default is to use strict cifs caching semantics */
1242 vol->strict_io = true;
1243
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05301244 vol->actimeo = CIFS_DEF_ACTIMEO;
1245
Jeff Layton23db65f2012-05-15 12:20:51 -04001246 /* FIXME: add autonegotiation -- for now, SMB1 is default */
1247 vol->ops = &smb1_operations;
1248 vol->vals = &smb1_values;
1249
Sean Finneyb9468452011-04-11 13:19:32 +00001250 if (!mountdata)
1251 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
Sean Finneyb9468452011-04-11 13:19:32 +00001253 mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL);
1254 if (!mountdata_copy)
1255 goto cifs_parse_mount_err;
1256
1257 options = mountdata_copy;
Pavel Shilovsky4906e502011-04-14 22:00:56 +04001258 end = options + strlen(options);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001259
Steve French50c2f752007-07-13 00:33:32 +00001260 if (strncmp(options, "sep=", 4) == 0) {
Steve Frenchfb8c4b12007-07-10 01:16:18 +00001261 if (options[4] != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 separator[0] = options[4];
1263 options += 5;
1264 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -05001265 cifs_dbg(FYI, "Null separator not allowed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 }
1267 }
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001268 vol->backupuid_specified = false; /* no backup intent for a user */
1269 vol->backupgid_specified = false; /* no backup intent for a group */
Steve French50c2f752007-07-13 00:33:32 +00001270
Jeff Layton37d4f992013-05-24 07:40:05 -04001271 switch (cifs_parse_devname(devname, vol)) {
1272 case 0:
1273 break;
1274 case -ENOMEM:
1275 cifs_dbg(VFS, "Unable to allocate memory for devname.\n");
1276 goto cifs_parse_mount_err;
1277 case -EINVAL:
1278 cifs_dbg(VFS, "Malformed UNC in devname.\n");
1279 goto cifs_parse_mount_err;
1280 default:
1281 cifs_dbg(VFS, "Unknown error parsing devname.\n");
1282 goto cifs_parse_mount_err;
Jeff Laytond387a5c2012-12-10 06:10:46 -05001283 }
1284
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285 while ((data = strsep(&options, separator)) != NULL) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001286 substring_t args[MAX_OPT_ARGS];
1287 unsigned long option;
1288 int token;
1289
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 if (!*data)
1291 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001293 token = match_token(data, cifs_mount_option_tokens, args);
1294
1295 switch (token) {
1296
1297 /* Ingnore the following */
1298 case Opt_ignore:
1299 break;
1300
1301 /* Boolean values */
1302 case Opt_user_xattr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 vol->no_xattr = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001304 break;
1305 case Opt_nouser_xattr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 vol->no_xattr = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001307 break;
1308 case Opt_forceuid:
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001309 override_uid = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001310 break;
1311 case Opt_noforceuid:
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001312 override_uid = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001313 break;
Jeff Layton72bd4812012-10-03 16:02:36 -04001314 case Opt_forcegid:
1315 override_gid = 1;
1316 break;
1317 case Opt_noforcegid:
1318 override_gid = 0;
1319 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001320 case Opt_noblocksend:
Steve Frenchedf1ae42008-10-29 00:47:57 +00001321 vol->noblocksnd = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001322 break;
1323 case Opt_noautotune:
Steve Frenchedf1ae42008-10-29 00:47:57 +00001324 vol->noautotune = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001325 break;
1326 case Opt_hard:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 vol->retry = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001328 break;
1329 case Opt_soft:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 vol->retry = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001331 break;
1332 case Opt_perm:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 vol->noperm = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001334 break;
1335 case Opt_noperm:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 vol->noperm = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001337 break;
1338 case Opt_mapchars:
Steve French6a0b4822005-04-28 22:41:05 -07001339 vol->remap = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001340 break;
1341 case Opt_nomapchars:
Steve French6a0b4822005-04-28 22:41:05 -07001342 vol->remap = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001343 break;
1344 case Opt_sfu:
Steve French50c2f752007-07-13 00:33:32 +00001345 vol->sfu_emul = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001346 break;
1347 case Opt_nosfu:
Steve French50c2f752007-07-13 00:33:32 +00001348 vol->sfu_emul = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001349 break;
1350 case Opt_nodfs:
Steve French2c1b8612008-10-16 18:35:21 +00001351 vol->nodfs = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001352 break;
1353 case Opt_posixpaths:
Jeremy Allisonac670552005-06-22 17:26:35 -07001354 vol->posix_paths = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001355 break;
1356 case Opt_noposixpaths:
Jeremy Allisonac670552005-06-22 17:26:35 -07001357 vol->posix_paths = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001358 break;
1359 case Opt_nounix:
Steve Frenchc18c8422007-07-18 23:21:09 +00001360 vol->no_linux_ext = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001361 break;
1362 case Opt_nocase:
Steve French50c2f752007-07-13 00:33:32 +00001363 vol->nocase = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001364 break;
1365 case Opt_brl:
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001366 vol->nobrl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001367 break;
1368 case Opt_nobrl:
Steve Frenchc46fa8a2005-08-18 20:49:57 -07001369 vol->nobrl = 1;
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +04001370 /*
1371 * turn off mandatory locking in mode
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001372 * if remote locking is turned off since the
Pavel Shilovsky5cfdddc2012-03-27 20:51:15 +04001373 * local vfs will do advisory
1374 */
Steve French50c2f752007-07-13 00:33:32 +00001375 if (vol->file_mode ==
1376 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
Steve Frenchd3485d32005-08-19 11:04:29 -07001377 vol->file_mode = S_IALLUGO;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001378 break;
1379 case Opt_forcemandatorylock:
Steve French13a6e422008-12-02 17:24:33 +00001380 vol->mand_lock = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001381 break;
1382 case Opt_setuids:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 vol->setuids = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001384 break;
1385 case Opt_nosetuids:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 vol->setuids = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001387 break;
1388 case Opt_dynperm:
Jeff Laytond0a9c072008-05-12 22:23:49 +00001389 vol->dynperm = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001390 break;
1391 case Opt_nodynperm:
Jeff Laytond0a9c072008-05-12 22:23:49 +00001392 vol->dynperm = false;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001393 break;
1394 case Opt_nohard:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 vol->retry = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001396 break;
1397 case Opt_nosoft:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398 vol->retry = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001399 break;
1400 case Opt_nointr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 vol->intr = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001402 break;
1403 case Opt_intr:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 vol->intr = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001405 break;
1406 case Opt_nostrictsync:
Steve Frenchbe652442009-02-23 15:21:59 +00001407 vol->nostrictsync = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001408 break;
1409 case Opt_strictsync:
Steve Frenchbe652442009-02-23 15:21:59 +00001410 vol->nostrictsync = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001411 break;
1412 case Opt_serverino:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 vol->server_ino = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001414 break;
1415 case Opt_noserverino:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 vol->server_ino = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001417 break;
1418 case Opt_rwpidforward:
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00001419 vol->rwpidforward = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001420 break;
1421 case Opt_cifsacl:
Steve French0a4b92c2006-01-12 15:44:21 -08001422 vol->cifs_acl = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001423 break;
1424 case Opt_nocifsacl:
Steve French0a4b92c2006-01-12 15:44:21 -08001425 vol->cifs_acl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001426 break;
1427 case Opt_acl:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 vol->no_psx_acl = 0;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001429 break;
1430 case Opt_noacl:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001431 vol->no_psx_acl = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001432 break;
1433 case Opt_locallease:
Steve French84210e92008-10-23 04:42:37 +00001434 vol->local_lease = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001435 break;
1436 case Opt_sign:
Jeff Layton1e3cc572013-06-10 17:12:23 -05001437 vol->sign = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001438 break;
1439 case Opt_seal:
Steve French95b1cb92008-05-15 16:44:38 +00001440 /* we do not do the following in secFlags because seal
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001441 * is a per tree connection (mount) not a per socket
1442 * or per-smb connection option in the protocol
1443 * vol->secFlg |= CIFSSEC_MUST_SEAL;
1444 */
Steve French95b1cb92008-05-15 16:44:38 +00001445 vol->seal = 1;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001446 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001447 case Opt_noac:
Steve French50c2f752007-07-13 00:33:32 +00001448 printk(KERN_WARNING "CIFS: Mount option noac not "
1449 "supported. Instead set "
1450 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001451 break;
1452 case Opt_fsc:
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301453#ifndef CONFIG_CIFS_FSCACHE
Joe Perchesf96637b2013-05-04 22:12:25 -05001454 cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001455 goto cifs_parse_mount_err;
Suresh Jayaraman607a5692010-11-24 17:49:05 +05301456#endif
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05301457 vol->fsc = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001458 break;
1459 case Opt_mfsymlinks:
Stefan Metzmacher736a3322010-07-30 14:56:00 +02001460 vol->mfsymlinks = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001461 break;
1462 case Opt_multiuser:
Jeff Layton0eb8a132010-10-06 19:51:12 -04001463 vol->multiuser = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001464 break;
Jeff Laytond8162552012-03-23 14:40:56 -04001465 case Opt_sloppy:
1466 sloppy = true;
1467 break;
Jeff Laytona0b3df52013-05-24 07:40:59 -04001468 case Opt_nosharesock:
1469 vol->nosharesock = true;
1470 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001471
1472 /* Numeric Values */
1473 case Opt_backupuid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001474 if (get_option_uid(args, &vol->backupuid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001475 cifs_dbg(VFS, "%s: Invalid backupuid value\n",
1476 __func__);
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001477 goto cifs_parse_mount_err;
1478 }
1479 vol->backupuid_specified = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001480 break;
1481 case Opt_backupgid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001482 if (get_option_gid(args, &vol->backupgid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001483 cifs_dbg(VFS, "%s: Invalid backupgid value\n",
1484 __func__);
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05001485 goto cifs_parse_mount_err;
1486 }
1487 vol->backupgid_specified = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001488 break;
1489 case Opt_uid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001490 if (get_option_uid(args, &vol->linux_uid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001491 cifs_dbg(VFS, "%s: Invalid uid value\n",
1492 __func__);
Sean Finneyb9468452011-04-11 13:19:32 +00001493 goto cifs_parse_mount_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001494 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001495 uid_specified = true;
1496 break;
1497 case Opt_cruid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001498 if (get_option_uid(args, &vol->cred_uid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001499 cifs_dbg(VFS, "%s: Invalid cruid value\n",
1500 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001501 goto cifs_parse_mount_err;
1502 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001503 break;
1504 case Opt_gid:
Eric W. Biederman3da46562013-02-06 01:37:39 -08001505 if (get_option_gid(args, &vol->linux_gid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001506 cifs_dbg(VFS, "%s: Invalid gid value\n",
1507 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001508 goto cifs_parse_mount_err;
1509 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001510 gid_specified = true;
1511 break;
1512 case Opt_file_mode:
1513 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001514 cifs_dbg(VFS, "%s: Invalid file_mode value\n",
1515 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001516 goto cifs_parse_mount_err;
1517 }
1518 vol->file_mode = option;
1519 break;
1520 case Opt_dirmode:
1521 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001522 cifs_dbg(VFS, "%s: Invalid dir_mode value\n",
1523 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001524 goto cifs_parse_mount_err;
1525 }
1526 vol->dir_mode = option;
1527 break;
1528 case Opt_port:
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001529 if (get_option_ul(args, &option) ||
1530 option > USHRT_MAX) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001531 cifs_dbg(VFS, "%s: Invalid port value\n",
1532 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001533 goto cifs_parse_mount_err;
1534 }
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001535 port = (unsigned short)option;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001536 break;
1537 case Opt_rsize:
1538 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001539 cifs_dbg(VFS, "%s: Invalid rsize value\n",
1540 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001541 goto cifs_parse_mount_err;
1542 }
1543 vol->rsize = option;
1544 break;
1545 case Opt_wsize:
1546 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001547 cifs_dbg(VFS, "%s: Invalid wsize value\n",
1548 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001549 goto cifs_parse_mount_err;
1550 }
1551 vol->wsize = option;
1552 break;
1553 case Opt_actimeo:
1554 if (get_option_ul(args, &option)) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001555 cifs_dbg(VFS, "%s: Invalid actimeo value\n",
1556 __func__);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001557 goto cifs_parse_mount_err;
1558 }
1559 vol->actimeo = HZ * option;
1560 if (vol->actimeo > CIFS_MAX_ACTIMEO) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001561 cifs_dbg(VFS, "attribute cache timeout too large\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001562 goto cifs_parse_mount_err;
1563 }
1564 break;
1565
1566 /* String Arguments */
1567
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001568 case Opt_blank_user:
1569 /* null user, ie. anonymous authentication */
1570 vol->nullauth = 1;
1571 vol->username = NULL;
1572 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001573 case Opt_user:
1574 string = match_strdup(args);
1575 if (string == NULL)
1576 goto out_nomem;
1577
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001578 if (strnlen(string, MAX_USERNAME_SIZE) >
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001579 MAX_USERNAME_SIZE) {
1580 printk(KERN_WARNING "CIFS: username too long\n");
1581 goto cifs_parse_mount_err;
1582 }
1583 vol->username = kstrdup(string, GFP_KERNEL);
Joe Perchesf96637b2013-05-04 22:12:25 -05001584 if (!vol->username)
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001585 goto cifs_parse_mount_err;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001586 break;
1587 case Opt_blank_pass:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001588 /* passwords have to be handled differently
1589 * to allow the character used for deliminator
1590 * to be passed within them
1591 */
1592
Sachin Prabhuc369c9a2013-04-09 18:17:41 +01001593 /*
1594 * Check if this is a case where the password
1595 * starts with a delimiter
1596 */
1597 tmp_end = strchr(data, '=');
1598 tmp_end++;
1599 if (!(tmp_end < end && tmp_end[1] == delim)) {
1600 /* No it is not. Set the password to NULL */
1601 vol->password = NULL;
1602 break;
1603 }
1604 /* Yes it is. Drop down to Opt_pass below.*/
1605 case Opt_pass:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001606 /* Obtain the value string */
1607 value = strchr(data, '=');
Sachin Prabhu10238072012-03-28 18:07:08 +01001608 value++;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001609
1610 /* Set tmp_end to end of the string */
1611 tmp_end = (char *) value + strlen(value);
1612
1613 /* Check if following character is the deliminator
1614 * If yes, we have encountered a double deliminator
1615 * reset the NULL character to the deliminator
1616 */
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301617 if (tmp_end < end && tmp_end[1] == delim) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001618 tmp_end[0] = delim;
1619
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301620 /* Keep iterating until we get to a single
1621 * deliminator OR the end
1622 */
1623 while ((tmp_end = strchr(tmp_end, delim))
1624 != NULL && (tmp_end[1] == delim)) {
1625 tmp_end = (char *) &tmp_end[2];
1626 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001627
Suresh Jayaramane73f8432012-06-12 07:15:50 +05301628 /* Reset var options to point to next element */
1629 if (tmp_end) {
1630 tmp_end[0] = '\0';
1631 options = (char *) &tmp_end[1];
1632 } else
1633 /* Reached the end of the mount option
1634 * string */
1635 options = end;
1636 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001637
1638 /* Now build new password string */
1639 temp_len = strlen(value);
1640 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
1641 if (vol->password == NULL) {
1642 printk(KERN_WARNING "CIFS: no memory "
1643 "for password\n");
1644 goto cifs_parse_mount_err;
1645 }
1646
1647 for (i = 0, j = 0; i < temp_len; i++, j++) {
1648 vol->password[j] = value[i];
1649 if ((value[i] == delim) &&
1650 value[i+1] == delim)
1651 /* skip the second deliminator */
1652 i++;
1653 }
1654 vol->password[j] = '\0';
1655 break;
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001656 case Opt_blank_ip:
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001657 /* FIXME: should this be an error instead? */
1658 got_ip = false;
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001659 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001660 case Opt_ip:
1661 string = match_strdup(args);
1662 if (string == NULL)
1663 goto out_nomem;
1664
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001665 if (!cifs_convert_address(dstaddr, string,
1666 strlen(string))) {
1667 printk(KERN_ERR "CIFS: bad ip= option (%s).\n",
1668 string);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001669 goto cifs_parse_mount_err;
1670 }
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001671 got_ip = true;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001672 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001673 case Opt_domain:
1674 string = match_strdup(args);
1675 if (string == NULL)
1676 goto out_nomem;
1677
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001678 if (strnlen(string, 256) == 256) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001679 printk(KERN_WARNING "CIFS: domain name too"
1680 " long\n");
1681 goto cifs_parse_mount_err;
1682 }
1683
1684 vol->domainname = kstrdup(string, GFP_KERNEL);
1685 if (!vol->domainname) {
1686 printk(KERN_WARNING "CIFS: no memory "
1687 "for domainname\n");
1688 goto cifs_parse_mount_err;
1689 }
Joe Perchesf96637b2013-05-04 22:12:25 -05001690 cifs_dbg(FYI, "Domain name set\n");
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001691 break;
1692 case Opt_srcaddr:
1693 string = match_strdup(args);
1694 if (string == NULL)
1695 goto out_nomem;
1696
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001697 if (!cifs_convert_address(
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001698 (struct sockaddr *)&vol->srcaddr,
1699 string, strlen(string))) {
1700 printk(KERN_WARNING "CIFS: Could not parse"
1701 " srcaddr: %s\n", string);
1702 goto cifs_parse_mount_err;
1703 }
1704 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001705 case Opt_iocharset:
1706 string = match_strdup(args);
1707 if (string == NULL)
1708 goto out_nomem;
1709
Sachin Prabhu4fe9e962012-04-10 18:12:27 +01001710 if (strnlen(string, 1024) >= 65) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001711 printk(KERN_WARNING "CIFS: iocharset name "
1712 "too long.\n");
1713 goto cifs_parse_mount_err;
1714 }
1715
1716 if (strnicmp(string, "default", 7) != 0) {
1717 vol->iocharset = kstrdup(string,
1718 GFP_KERNEL);
1719 if (!vol->iocharset) {
1720 printk(KERN_WARNING "CIFS: no memory"
1721 "for charset\n");
1722 goto cifs_parse_mount_err;
1723 }
1724 }
1725 /* if iocharset not set then load_nls_default
1726 * is used by caller
1727 */
Joe Perchesf96637b2013-05-04 22:12:25 -05001728 cifs_dbg(FYI, "iocharset set to %s\n", string);
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001729 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001730 case Opt_netbiosname:
1731 string = match_strdup(args);
1732 if (string == NULL)
1733 goto out_nomem;
1734
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001735 memset(vol->source_rfc1001_name, 0x20,
1736 RFC1001_NAME_LEN);
1737 /*
1738 * FIXME: are there cases in which a comma can
1739 * be valid in workstation netbios name (and
1740 * need special handling)?
1741 */
1742 for (i = 0; i < RFC1001_NAME_LEN; i++) {
1743 /* don't ucase netbiosname for user */
1744 if (string[i] == 0)
1745 break;
1746 vol->source_rfc1001_name[i] = string[i];
1747 }
1748 /* The string has 16th byte zero still from
1749 * set at top of the function
1750 */
1751 if (i == RFC1001_NAME_LEN && string[i] != 0)
1752 printk(KERN_WARNING "CIFS: netbiosname"
1753 " longer than 15 truncated.\n");
1754
1755 break;
1756 case Opt_servern:
1757 /* servernetbiosname specified override *SMBSERVER */
1758 string = match_strdup(args);
1759 if (string == NULL)
1760 goto out_nomem;
1761
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001762 /* last byte, type, is 0x20 for servr type */
1763 memset(vol->target_rfc1001_name, 0x20,
1764 RFC1001_NAME_LEN_WITH_NULL);
1765
1766 /* BB are there cases in which a comma can be
1767 valid in this workstation netbios name
1768 (and need special handling)? */
1769
1770 /* user or mount helper must uppercase the
1771 netbios name */
1772 for (i = 0; i < 15; i++) {
1773 if (string[i] == 0)
1774 break;
1775 vol->target_rfc1001_name[i] = string[i];
1776 }
1777 /* The string has 16th byte zero still from
1778 set at top of the function */
1779 if (i == RFC1001_NAME_LEN && string[i] != 0)
1780 printk(KERN_WARNING "CIFS: server net"
1781 "biosname longer than 15 truncated.\n");
1782 break;
1783 case Opt_ver:
1784 string = match_strdup(args);
1785 if (string == NULL)
1786 goto out_nomem;
1787
Jeff Layton5249af32012-05-15 12:04:03 -04001788 if (strnicmp(string, "1", 1) == 0) {
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001789 /* This is the default */
1790 break;
1791 }
1792 /* For all other value, error */
1793 printk(KERN_WARNING "CIFS: Invalid version"
1794 " specified\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001795 goto cifs_parse_mount_err;
Jeff Layton23db65f2012-05-15 12:20:51 -04001796 case Opt_vers:
1797 string = match_strdup(args);
1798 if (string == NULL)
1799 goto out_nomem;
1800
1801 if (cifs_parse_smb_version(string, vol) != 0)
1802 goto cifs_parse_mount_err;
1803 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001804 case Opt_sec:
1805 string = match_strdup(args);
1806 if (string == NULL)
1807 goto out_nomem;
1808
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001809 if (cifs_parse_security_flavors(string, vol) != 0)
1810 goto cifs_parse_mount_err;
1811 break;
Jeff Layton15b6a472012-05-16 07:50:15 -04001812 case Opt_cache:
1813 string = match_strdup(args);
1814 if (string == NULL)
1815 goto out_nomem;
1816
1817 if (cifs_parse_cache_flavor(string, vol) != 0)
1818 goto cifs_parse_mount_err;
1819 break;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001820 default:
Jeff Laytond8162552012-03-23 14:40:56 -04001821 /*
1822 * An option we don't recognize. Save it off for later
1823 * if we haven't already found one
1824 */
1825 if (!invalid)
1826 invalid = data;
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001827 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001828 }
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001829 /* Free up any allocated string */
1830 kfree(string);
1831 string = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001832 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001833
Jeff Laytond8162552012-03-23 14:40:56 -04001834 if (!sloppy && invalid) {
1835 printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid);
1836 goto cifs_parse_mount_err;
1837 }
1838
Jeff Layton8a8798a2012-01-17 16:09:15 -05001839#ifndef CONFIG_KEYS
1840 /* Muliuser mounts require CONFIG_KEYS support */
1841 if (vol->multiuser) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001842 cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001843 goto cifs_parse_mount_err;
Jeff Layton0eb8a132010-10-06 19:51:12 -04001844 }
Jeff Layton8a8798a2012-01-17 16:09:15 -05001845#endif
Jeff Laytone5e69ab2012-11-25 08:00:42 -05001846 if (!vol->UNC) {
Jeff Layton37d4f992013-05-24 07:40:05 -04001847 cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n");
Jeff Laytone5e69ab2012-11-25 08:00:42 -05001848 goto cifs_parse_mount_err;
1849 }
Jeff Layton0eb8a132010-10-06 19:51:12 -04001850
Jeff Layton62a1a432012-12-10 06:10:45 -05001851 /* make sure UNC has a share name */
1852 if (!strchr(vol->UNC + 3, '\\')) {
Joe Perchesf96637b2013-05-04 22:12:25 -05001853 cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n");
Jeff Layton62a1a432012-12-10 06:10:45 -05001854 goto cifs_parse_mount_err;
1855 }
1856
Jeff Laytonb979aaa2012-11-26 11:09:55 -05001857 if (!got_ip) {
1858 /* No ip= option specified? Try to get it from UNC */
1859 if (!cifs_convert_address(dstaddr, &vol->UNC[2],
1860 strlen(&vol->UNC[2]))) {
1861 printk(KERN_ERR "Unable to determine destination "
1862 "address.\n");
1863 goto cifs_parse_mount_err;
1864 }
1865 }
1866
1867 /* set the port that we got earlier */
1868 cifs_set_port(dstaddr, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869
Jeff Layton9b9d6b242009-07-31 06:56:09 -04001870 if (uid_specified)
1871 vol->override_uid = override_uid;
1872 else if (override_uid == 1)
1873 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1874 "specified with no uid= option.\n");
1875
1876 if (gid_specified)
1877 vol->override_gid = override_gid;
1878 else if (override_gid == 1)
1879 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1880 "specified with no gid= option.\n");
1881
Sean Finneyb9468452011-04-11 13:19:32 +00001882 kfree(mountdata_copy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 return 0;
Sean Finneyb9468452011-04-11 13:19:32 +00001884
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001885out_nomem:
1886 printk(KERN_WARNING "Could not allocate temporary buffer\n");
Sean Finneyb9468452011-04-11 13:19:32 +00001887cifs_parse_mount_err:
Sachin Prabhu8830d7e2012-03-23 14:40:56 -04001888 kfree(string);
Sean Finneyb9468452011-04-11 13:19:32 +00001889 kfree(mountdata_copy);
1890 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891}
1892
Ben Greear3eb9a882010-09-01 17:06:02 -07001893/** Returns true if srcaddr isn't specified and rhs isn't
1894 * specified, or if srcaddr is specified and
1895 * matches the IP address of the rhs argument.
1896 */
Jeff Layton45151482010-07-06 20:43:02 -04001897static bool
Ben Greear3eb9a882010-09-01 17:06:02 -07001898srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
1899{
1900 switch (srcaddr->sa_family) {
1901 case AF_UNSPEC:
1902 return (rhs->sa_family == AF_UNSPEC);
1903 case AF_INET: {
1904 struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr;
1905 struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs;
1906 return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr);
1907 }
1908 case AF_INET6: {
1909 struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr;
Nickolai Zeldoviche3e27752013-01-16 21:36:17 -05001910 struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs;
Ben Greear3eb9a882010-09-01 17:06:02 -07001911 return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr);
1912 }
1913 default:
1914 WARN_ON(1);
1915 return false; /* don't expect to be here */
1916 }
1917}
1918
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001919/*
1920 * If no port is specified in addr structure, we try to match with 445 port
1921 * and if it fails - with 139 ports. It should be called only if address
1922 * families of server and addr are equal.
1923 */
1924static bool
1925match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
1926{
Steve French6da97912011-03-13 18:55:55 +00001927 __be16 port, *sport;
Pavel Shilovsky4b886132010-12-13 22:18:07 +03001928
1929 switch (addr->sa_family) {
1930 case AF_INET:
1931 sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
1932 port = ((struct sockaddr_in *) addr)->sin_port;
1933 break;
1934 case AF_INET6:
1935 sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port;
1936 port = ((struct sockaddr_in6 *) addr)->sin6_port;
1937 break;
1938 default:
1939 WARN_ON(1);
1940 return false;
1941 }
1942
1943 if (!port) {
1944 port = htons(CIFS_PORT);
1945 if (port == *sport)
1946 return true;
1947
1948 port = htons(RFC1001_PORT);
1949 }
1950
1951 return port == *sport;
1952}
Ben Greear3eb9a882010-09-01 17:06:02 -07001953
1954static bool
1955match_address(struct TCP_Server_Info *server, struct sockaddr *addr,
1956 struct sockaddr *srcaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001957{
Jeff Layton45151482010-07-06 20:43:02 -04001958 switch (addr->sa_family) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001959 case AF_INET: {
1960 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1961 struct sockaddr_in *srv_addr4 =
1962 (struct sockaddr_in *)&server->dstaddr;
1963
1964 if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr)
Jeff Layton45151482010-07-06 20:43:02 -04001965 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001966 break;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001967 }
1968 case AF_INET6: {
1969 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1970 struct sockaddr_in6 *srv_addr6 =
1971 (struct sockaddr_in6 *)&server->dstaddr;
1972
Jeff Layton45151482010-07-06 20:43:02 -04001973 if (!ipv6_addr_equal(&addr6->sin6_addr,
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001974 &srv_addr6->sin6_addr))
Jeff Layton45151482010-07-06 20:43:02 -04001975 return false;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001976 if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id)
Jeff Layton45151482010-07-06 20:43:02 -04001977 return false;
Jeff Layton45151482010-07-06 20:43:02 -04001978 break;
1979 }
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03001980 default:
1981 WARN_ON(1);
1982 return false; /* don't expect to be here */
1983 }
Jeff Layton45151482010-07-06 20:43:02 -04001984
Ben Greear3eb9a882010-09-01 17:06:02 -07001985 if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr))
1986 return false;
1987
Jeff Layton45151482010-07-06 20:43:02 -04001988 return true;
1989}
1990
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04001991static bool
1992match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1993{
Jeff Layton3f618222013-06-12 19:52:14 -05001994 /*
1995 * The select_sectype function should either return the vol->sectype
1996 * that was specified, or "Unspecified" if that sectype was not
1997 * compatible with the given NEGOTIATE request.
1998 */
1999 if (select_sectype(server, vol->sectype) == Unspecified)
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002000 return false;
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002001
Jeff Layton3f618222013-06-12 19:52:14 -05002002 /*
2003 * Now check if signing mode is acceptable. No need to check
2004 * global_secflags at this point since if MUST_SIGN is set then
2005 * the server->sign had better be too.
2006 */
Jeff Layton38d77c52013-05-26 07:01:00 -04002007 if (vol->sign && !server->sign)
2008 return false;
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002009
2010 return true;
2011}
2012
Jeff Layton9fa114f2012-11-26 11:09:57 -05002013static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002014{
Jeff Layton9fa114f2012-11-26 11:09:57 -05002015 struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr;
2016
Jeff Laytona0b3df52013-05-24 07:40:59 -04002017 if (vol->nosharesock)
2018 return 0;
2019
Jeff Layton23db65f2012-05-15 12:20:51 -04002020 if ((server->vals != vol->vals) || (server->ops != vol->ops))
2021 return 0;
2022
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002023 if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns))
2024 return 0;
2025
2026 if (!match_address(server, addr,
2027 (struct sockaddr *)&vol->srcaddr))
2028 return 0;
2029
2030 if (!match_port(server, addr))
2031 return 0;
2032
2033 if (!match_security(server, vol))
2034 return 0;
2035
2036 return 1;
2037}
2038
Jeff Layton45151482010-07-06 20:43:02 -04002039static struct TCP_Server_Info *
Jeff Layton9fa114f2012-11-26 11:09:57 -05002040cifs_find_tcp_session(struct smb_vol *vol)
Jeff Layton45151482010-07-06 20:43:02 -04002041{
Jeff Laytone7ddee92008-11-14 13:44:38 -05002042 struct TCP_Server_Info *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302044 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton45151482010-07-06 20:43:02 -04002045 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
Jeff Layton9fa114f2012-11-26 11:09:57 -05002046 if (!match_server(server, vol))
Jeff Laytondaf5b0b2010-07-06 20:43:02 -04002047 continue;
2048
Jeff Laytone7ddee92008-11-14 13:44:38 -05002049 ++server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302050 spin_unlock(&cifs_tcp_ses_lock);
Joe Perchesf96637b2013-05-04 22:12:25 -05002051 cifs_dbg(FYI, "Existing tcp session with server found\n");
Jeff Laytone7ddee92008-11-14 13:44:38 -05002052 return server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002053 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302054 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002055 return NULL;
2056}
2057
Jeff Layton14fbf502008-11-14 13:53:46 -05002058static void
Jeff Laytone7ddee92008-11-14 13:44:38 -05002059cifs_put_tcp_session(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060{
Jeff Laytone7ddee92008-11-14 13:44:38 -05002061 struct task_struct *task;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002062
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302063 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002064 if (--server->srv_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302065 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002066 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002067 }
Steve Frenchdea570e02008-05-06 22:05:51 +00002068
Rob Landleyf1d0c992011-01-22 15:44:05 -06002069 put_net(cifs_net_ns(server));
2070
Jeff Laytone7ddee92008-11-14 13:44:38 -05002071 list_del_init(&server->tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302072 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytone7ddee92008-11-14 13:44:38 -05002073
Jeff Laytonc74093b2011-01-11 07:24:23 -05002074 cancel_delayed_work_sync(&server->echo);
2075
Jeff Laytone7ddee92008-11-14 13:44:38 -05002076 spin_lock(&GlobalMid_Lock);
2077 server->tcpStatus = CifsExiting;
2078 spin_unlock(&GlobalMid_Lock);
2079
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002080 cifs_crypto_shash_release(server);
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05302081 cifs_fscache_release_client_cookie(server);
2082
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05002083 kfree(server->session_key.response);
2084 server->session_key.response = NULL;
2085 server->session_key.len = 0;
2086
Jeff Laytone7ddee92008-11-14 13:44:38 -05002087 task = xchg(&server->tsk, NULL);
2088 if (task)
2089 force_sig(SIGKILL, task);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090}
2091
Jeff Layton63c038c2008-12-01 18:41:46 -05002092static struct TCP_Server_Info *
2093cifs_get_tcp_session(struct smb_vol *volume_info)
2094{
2095 struct TCP_Server_Info *tcp_ses = NULL;
Jeff Layton63c038c2008-12-01 18:41:46 -05002096 int rc;
2097
Joe Perchesf96637b2013-05-04 22:12:25 -05002098 cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC);
Jeff Layton63c038c2008-12-01 18:41:46 -05002099
2100 /* see if we already have a matching tcp_ses */
Jeff Layton9fa114f2012-11-26 11:09:57 -05002101 tcp_ses = cifs_find_tcp_session(volume_info);
Jeff Layton63c038c2008-12-01 18:41:46 -05002102 if (tcp_ses)
2103 return tcp_ses;
2104
2105 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
2106 if (!tcp_ses) {
2107 rc = -ENOMEM;
2108 goto out_err;
2109 }
2110
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002111 rc = cifs_crypto_shash_allocate(tcp_ses);
2112 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002113 cifs_dbg(VFS, "could not setup hash structures rc %d\n", rc);
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002114 goto out_err;
2115 }
2116
Jeff Layton23db65f2012-05-15 12:20:51 -04002117 tcp_ses->ops = volume_info->ops;
2118 tcp_ses->vals = volume_info->vals;
Rob Landleyf1d0c992011-01-22 15:44:05 -06002119 cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
Jeff Layton63c038c2008-12-01 18:41:46 -05002120 tcp_ses->hostname = extract_hostname(volume_info->UNC);
2121 if (IS_ERR(tcp_ses->hostname)) {
2122 rc = PTR_ERR(tcp_ses->hostname);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002123 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002124 }
2125
2126 tcp_ses->noblocksnd = volume_info->noblocksnd;
2127 tcp_ses->noautotune = volume_info->noautotune;
Steve French6a5fa2362010-01-01 01:28:43 +00002128 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
Pavel Shilovskyfc40f9c2012-02-17 17:09:12 +03002129 tcp_ses->in_flight = 0;
Pavel Shilovsky2d86dbc2012-02-06 15:59:18 +04002130 tcp_ses->credits = 1;
Jeff Layton63c038c2008-12-01 18:41:46 -05002131 init_waitqueue_head(&tcp_ses->response_q);
2132 init_waitqueue_head(&tcp_ses->request_q);
2133 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
2134 mutex_init(&tcp_ses->srv_mutex);
2135 memcpy(tcp_ses->workstation_RFC1001_name,
2136 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
2137 memcpy(tcp_ses->server_RFC1001_name,
2138 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05002139 tcp_ses->session_estab = false;
Jeff Layton63c038c2008-12-01 18:41:46 -05002140 tcp_ses->sequence_number = 0;
Steve Frenchfda35942011-01-20 18:06:34 +00002141 tcp_ses->lstrp = jiffies;
Jeff Layton58fa0152012-05-01 17:41:16 -04002142 spin_lock_init(&tcp_ses->req_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002143 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
2144 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
Jeff Laytonc74093b2011-01-11 07:24:23 -05002145 INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);
Jeff Layton9fa114f2012-11-26 11:09:57 -05002146 memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr,
2147 sizeof(tcp_ses->srcaddr));
2148 memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr,
2149 sizeof(tcp_ses->dstaddr));
Jeff Layton63c038c2008-12-01 18:41:46 -05002150 /*
2151 * at this point we are the only ones with the pointer
2152 * to the struct since the kernel thread not created yet
2153 * no need to spinlock this init of tcpStatus or srv_count
2154 */
2155 tcp_ses->tcpStatus = CifsNew;
2156 ++tcp_ses->srv_count;
2157
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002158 rc = ip_connect(tcp_ses);
Jeff Layton63c038c2008-12-01 18:41:46 -05002159 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002160 cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n");
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002161 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002162 }
2163
2164 /*
2165 * since we're in a cifs function already, we know that
2166 * this will succeed. No need for try_module_get().
2167 */
2168 __module_get(THIS_MODULE);
Al Viro7c97c202011-06-21 08:51:28 -04002169 tcp_ses->tsk = kthread_run(cifs_demultiplex_thread,
Jeff Layton63c038c2008-12-01 18:41:46 -05002170 tcp_ses, "cifsd");
2171 if (IS_ERR(tcp_ses->tsk)) {
2172 rc = PTR_ERR(tcp_ses->tsk);
Joe Perchesf96637b2013-05-04 22:12:25 -05002173 cifs_dbg(VFS, "error %d create cifsd thread\n", rc);
Jeff Layton63c038c2008-12-01 18:41:46 -05002174 module_put(THIS_MODULE);
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002175 goto out_err_crypto_release;
Jeff Layton63c038c2008-12-01 18:41:46 -05002176 }
Steve Frenchfd88ce92011-04-12 01:01:14 +00002177 tcp_ses->tcpStatus = CifsNeedNegotiate;
Jeff Layton63c038c2008-12-01 18:41:46 -05002178
2179 /* thread spawned, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302180 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002181 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302182 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton63c038c2008-12-01 18:41:46 -05002183
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +05302184 cifs_fscache_get_client_cookie(tcp_ses);
2185
Jeff Laytonc74093b2011-01-11 07:24:23 -05002186 /* queue echo request delayed work */
Jeff Laytonda472fc2012-03-23 14:40:53 -04002187 queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL);
Jeff Laytonc74093b2011-01-11 07:24:23 -05002188
Jeff Layton63c038c2008-12-01 18:41:46 -05002189 return tcp_ses;
2190
Shirish Pargaonkarf7c54452010-10-26 18:10:24 -05002191out_err_crypto_release:
Shirish Pargaonkard2b91522010-10-21 14:25:08 -05002192 cifs_crypto_shash_release(tcp_ses);
2193
Rob Landleyf1d0c992011-01-22 15:44:05 -06002194 put_net(cifs_net_ns(tcp_ses));
2195
Jeff Layton63c038c2008-12-01 18:41:46 -05002196out_err:
2197 if (tcp_ses) {
Steve French8347a5c2009-10-06 18:31:29 +00002198 if (!IS_ERR(tcp_ses->hostname))
2199 kfree(tcp_ses->hostname);
Jeff Layton63c038c2008-12-01 18:41:46 -05002200 if (tcp_ses->ssocket)
2201 sock_release(tcp_ses->ssocket);
2202 kfree(tcp_ses);
2203 }
2204 return ERR_PTR(rc);
2205}
2206
Steve French96daf2b2011-05-27 04:34:02 +00002207static int match_session(struct cifs_ses *ses, struct smb_vol *vol)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002208{
Jeff Layton3f618222013-06-12 19:52:14 -05002209 if (vol->sectype != Unspecified &&
2210 vol->sectype != ses->sectype)
2211 return 0;
2212
2213 switch (ses->sectype) {
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002214 case Kerberos:
Eric W. Biederman64ed39d2013-02-06 02:30:39 -08002215 if (!uid_eq(vol->cred_uid, ses->cred_uid))
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002216 return 0;
2217 break;
2218 default:
Jeff Layton04febab2012-01-17 16:09:15 -05002219 /* NULL username means anonymous session */
2220 if (ses->user_name == NULL) {
2221 if (!vol->nullauth)
2222 return 0;
2223 break;
2224 }
2225
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002226 /* anything else takes username/password */
Jeff Layton04febab2012-01-17 16:09:15 -05002227 if (strncmp(ses->user_name,
2228 vol->username ? vol->username : "",
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002229 MAX_USERNAME_SIZE))
2230 return 0;
2231 if (strlen(vol->username) != 0 &&
2232 ses->password != NULL &&
2233 strncmp(ses->password,
2234 vol->password ? vol->password : "",
2235 MAX_PASSWORD_SIZE))
2236 return 0;
2237 }
2238 return 1;
2239}
2240
Steve French96daf2b2011-05-27 04:34:02 +00002241static struct cifs_ses *
Jeff Layton4ff67b72010-07-06 20:43:02 -04002242cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002243{
Steve French96daf2b2011-05-27 04:34:02 +00002244 struct cifs_ses *ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002245
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302246 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton4ff67b72010-07-06 20:43:02 -04002247 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002248 if (!match_session(ses, vol))
2249 continue;
Jeff Layton14fbf502008-11-14 13:53:46 -05002250 ++ses->ses_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302251 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002252 return ses;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302254 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002255 return NULL;
2256}
2257
Jeff Layton14fbf502008-11-14 13:53:46 -05002258static void
Steve French96daf2b2011-05-27 04:34:02 +00002259cifs_put_smb_ses(struct cifs_ses *ses)
Jeff Layton14fbf502008-11-14 13:53:46 -05002260{
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04002261 unsigned int xid;
Jeff Layton14fbf502008-11-14 13:53:46 -05002262 struct TCP_Server_Info *server = ses->server;
2263
Joe Perchesf96637b2013-05-04 22:12:25 -05002264 cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302265 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002266 if (--ses->ses_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302267 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002268 return;
2269 }
2270
2271 list_del_init(&ses->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302272 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton14fbf502008-11-14 13:53:46 -05002273
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04002274 if (ses->status == CifsGood && server->ops->logoff) {
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002275 xid = get_xid();
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04002276 server->ops->logoff(xid, ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002277 _free_xid(xid);
Jeff Layton14fbf502008-11-14 13:53:46 -05002278 }
2279 sesInfoFree(ses);
2280 cifs_put_tcp_session(server);
2281}
2282
Jeff Layton8a8798a2012-01-17 16:09:15 -05002283#ifdef CONFIG_KEYS
2284
2285/* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */
2286#define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1)
2287
2288/* Populate username and pw fields from keyring if possible */
2289static int
2290cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses)
2291{
2292 int rc = 0;
2293 char *desc, *delim, *payload;
2294 ssize_t len;
2295 struct key *key;
2296 struct TCP_Server_Info *server = ses->server;
2297 struct sockaddr_in *sa;
2298 struct sockaddr_in6 *sa6;
2299 struct user_key_payload *upayload;
2300
2301 desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL);
2302 if (!desc)
2303 return -ENOMEM;
2304
2305 /* try to find an address key first */
2306 switch (server->dstaddr.ss_family) {
2307 case AF_INET:
2308 sa = (struct sockaddr_in *)&server->dstaddr;
2309 sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr);
2310 break;
2311 case AF_INET6:
2312 sa6 = (struct sockaddr_in6 *)&server->dstaddr;
2313 sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr);
2314 break;
2315 default:
Joe Perchesf96637b2013-05-04 22:12:25 -05002316 cifs_dbg(FYI, "Bad ss_family (%hu)\n",
2317 server->dstaddr.ss_family);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002318 rc = -EINVAL;
2319 goto out_err;
2320 }
2321
Joe Perchesf96637b2013-05-04 22:12:25 -05002322 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002323 key = request_key(&key_type_logon, desc, "");
2324 if (IS_ERR(key)) {
2325 if (!ses->domainName) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002326 cifs_dbg(FYI, "domainName is NULL\n");
Jeff Layton8a8798a2012-01-17 16:09:15 -05002327 rc = PTR_ERR(key);
2328 goto out_err;
2329 }
2330
2331 /* didn't work, try to find a domain key */
2332 sprintf(desc, "cifs:d:%s", ses->domainName);
Joe Perchesf96637b2013-05-04 22:12:25 -05002333 cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002334 key = request_key(&key_type_logon, desc, "");
2335 if (IS_ERR(key)) {
2336 rc = PTR_ERR(key);
2337 goto out_err;
2338 }
2339 }
2340
2341 down_read(&key->sem);
2342 upayload = key->payload.data;
2343 if (IS_ERR_OR_NULL(upayload)) {
Jeff Layton4edc53c2012-02-07 06:30:51 -05002344 rc = upayload ? PTR_ERR(upayload) : -EINVAL;
Jeff Layton8a8798a2012-01-17 16:09:15 -05002345 goto out_key_put;
2346 }
2347
2348 /* find first : in payload */
2349 payload = (char *)upayload->data;
2350 delim = strnchr(payload, upayload->datalen, ':');
Joe Perchesf96637b2013-05-04 22:12:25 -05002351 cifs_dbg(FYI, "payload=%s\n", payload);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002352 if (!delim) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002353 cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n",
2354 upayload->datalen);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002355 rc = -EINVAL;
2356 goto out_key_put;
2357 }
2358
2359 len = delim - payload;
2360 if (len > MAX_USERNAME_SIZE || len <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002361 cifs_dbg(FYI, "Bad value from username search (len=%zd)\n",
2362 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002363 rc = -EINVAL;
2364 goto out_key_put;
2365 }
2366
2367 vol->username = kstrndup(payload, len, GFP_KERNEL);
2368 if (!vol->username) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002369 cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n",
2370 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002371 rc = -ENOMEM;
2372 goto out_key_put;
2373 }
Joe Perchesf96637b2013-05-04 22:12:25 -05002374 cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002375
2376 len = key->datalen - (len + 1);
2377 if (len > MAX_PASSWORD_SIZE || len <= 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002378 cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002379 rc = -EINVAL;
2380 kfree(vol->username);
2381 vol->username = NULL;
2382 goto out_key_put;
2383 }
2384
2385 ++delim;
2386 vol->password = kstrndup(delim, len, GFP_KERNEL);
2387 if (!vol->password) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002388 cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n",
2389 len);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002390 rc = -ENOMEM;
2391 kfree(vol->username);
2392 vol->username = NULL;
2393 goto out_key_put;
2394 }
2395
2396out_key_put:
2397 up_read(&key->sem);
2398 key_put(key);
2399out_err:
2400 kfree(desc);
Joe Perchesf96637b2013-05-04 22:12:25 -05002401 cifs_dbg(FYI, "%s: returning %d\n", __func__, rc);
Jeff Layton8a8798a2012-01-17 16:09:15 -05002402 return rc;
2403}
2404#else /* ! CONFIG_KEYS */
2405static inline int
2406cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
2407 struct cifs_ses *ses __attribute__((unused)))
2408{
2409 return -ENOSYS;
2410}
2411#endif /* CONFIG_KEYS */
2412
Steve French96daf2b2011-05-27 04:34:02 +00002413static struct cifs_ses *
Jeff Layton36988c72010-04-24 07:57:43 -04002414cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
2415{
Pavel Shilovsky286170a2012-05-25 10:43:58 +04002416 int rc = -ENOMEM;
2417 unsigned int xid;
Steve French96daf2b2011-05-27 04:34:02 +00002418 struct cifs_ses *ses;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002419 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
2420 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
Jeff Layton36988c72010-04-24 07:57:43 -04002421
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002422 xid = get_xid();
Jeff Layton36988c72010-04-24 07:57:43 -04002423
Jeff Layton4ff67b72010-07-06 20:43:02 -04002424 ses = cifs_find_smb_ses(server, volume_info);
Jeff Layton36988c72010-04-24 07:57:43 -04002425 if (ses) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002426 cifs_dbg(FYI, "Existing smb sess found (status=%d)\n",
2427 ses->status);
Jeff Layton36988c72010-04-24 07:57:43 -04002428
Jeff Layton36988c72010-04-24 07:57:43 -04002429 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04002430 rc = cifs_negotiate_protocol(xid, ses);
2431 if (rc) {
2432 mutex_unlock(&ses->session_mutex);
2433 /* problem -- put our ses reference */
2434 cifs_put_smb_ses(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002435 free_xid(xid);
Jeff Layton198b5682010-04-24 07:57:48 -04002436 return ERR_PTR(rc);
2437 }
Jeff Layton36988c72010-04-24 07:57:43 -04002438 if (ses->need_reconnect) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002439 cifs_dbg(FYI, "Session needs reconnect\n");
Jeff Layton36988c72010-04-24 07:57:43 -04002440 rc = cifs_setup_session(xid, ses,
2441 volume_info->local_nls);
2442 if (rc) {
2443 mutex_unlock(&ses->session_mutex);
2444 /* problem -- put our reference */
2445 cifs_put_smb_ses(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002446 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002447 return ERR_PTR(rc);
2448 }
2449 }
2450 mutex_unlock(&ses->session_mutex);
Jeff Layton460cf342010-09-14 11:38:24 -04002451
2452 /* existing SMB ses has a server reference already */
2453 cifs_put_tcp_session(server);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002454 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002455 return ses;
2456 }
2457
Joe Perchesf96637b2013-05-04 22:12:25 -05002458 cifs_dbg(FYI, "Existing smb sess not found\n");
Jeff Layton36988c72010-04-24 07:57:43 -04002459 ses = sesInfoAlloc();
2460 if (ses == NULL)
2461 goto get_ses_fail;
2462
2463 /* new SMB session uses our server ref */
2464 ses->server = server;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002465 if (server->dstaddr.ss_family == AF_INET6)
2466 sprintf(ses->serverName, "%pI6", &addr6->sin6_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04002467 else
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002468 sprintf(ses->serverName, "%pI4", &addr->sin_addr);
Jeff Layton36988c72010-04-24 07:57:43 -04002469
Steve French8727c8a2011-02-25 01:11:56 -06002470 if (volume_info->username) {
2471 ses->user_name = kstrdup(volume_info->username, GFP_KERNEL);
2472 if (!ses->user_name)
2473 goto get_ses_fail;
2474 }
Jeff Layton36988c72010-04-24 07:57:43 -04002475
2476 /* volume_info->password freed at unmount */
2477 if (volume_info->password) {
2478 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
2479 if (!ses->password)
2480 goto get_ses_fail;
2481 }
2482 if (volume_info->domainname) {
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05002483 ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL);
2484 if (!ses->domainName)
2485 goto get_ses_fail;
Jeff Layton36988c72010-04-24 07:57:43 -04002486 }
Jeff Layton3e4b3e12010-07-19 18:00:17 -04002487 ses->cred_uid = volume_info->cred_uid;
Jeff Layton36988c72010-04-24 07:57:43 -04002488 ses->linux_uid = volume_info->linux_uid;
Steve Frenchd9b94202011-04-12 01:24:57 +00002489
Jeff Layton28e11bd2013-05-26 07:01:00 -04002490 ses->sectype = volume_info->sectype;
2491 ses->sign = volume_info->sign;
Jeff Layton36988c72010-04-24 07:57:43 -04002492
2493 mutex_lock(&ses->session_mutex);
Jeff Layton198b5682010-04-24 07:57:48 -04002494 rc = cifs_negotiate_protocol(xid, ses);
2495 if (!rc)
2496 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
Jeff Layton36988c72010-04-24 07:57:43 -04002497 mutex_unlock(&ses->session_mutex);
Steve Frenchc8e56f12010-09-08 21:10:58 +00002498 if (rc)
Jeff Layton36988c72010-04-24 07:57:43 -04002499 goto get_ses_fail;
2500
2501 /* success, put it on the list */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302502 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002503 list_add(&ses->smb_ses_list, &server->smb_ses_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302504 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton36988c72010-04-24 07:57:43 -04002505
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002506 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002507 return ses;
2508
2509get_ses_fail:
2510 sesInfoFree(ses);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002511 free_xid(xid);
Jeff Layton36988c72010-04-24 07:57:43 -04002512 return ERR_PTR(rc);
2513}
2514
Steve French96daf2b2011-05-27 04:34:02 +00002515static int match_tcon(struct cifs_tcon *tcon, const char *unc)
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002516{
2517 if (tcon->tidStatus == CifsExiting)
2518 return 0;
2519 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
2520 return 0;
2521 return 1;
2522}
2523
Steve French96daf2b2011-05-27 04:34:02 +00002524static struct cifs_tcon *
2525cifs_find_tcon(struct cifs_ses *ses, const char *unc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526{
2527 struct list_head *tmp;
Steve French96daf2b2011-05-27 04:34:02 +00002528 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302530 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002531 list_for_each(tmp, &ses->tcon_list) {
Steve French96daf2b2011-05-27 04:34:02 +00002532 tcon = list_entry(tmp, struct cifs_tcon, tcon_list);
Pavel Shilovsky37bb04e2011-05-05 09:55:11 +00002533 if (!match_tcon(tcon, unc))
Jeff Laytonf1987b42008-11-15 11:12:47 -05002534 continue;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002535 ++tcon->tc_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302536 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537 return tcon;
2538 }
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302539 spin_unlock(&cifs_tcp_ses_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540 return NULL;
2541}
2542
Jeff Laytonf1987b42008-11-15 11:12:47 -05002543static void
Steve French96daf2b2011-05-27 04:34:02 +00002544cifs_put_tcon(struct cifs_tcon *tcon)
Jeff Laytonf1987b42008-11-15 11:12:47 -05002545{
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002546 unsigned int xid;
Steve French96daf2b2011-05-27 04:34:02 +00002547 struct cifs_ses *ses = tcon->ses;
Jeff Laytonf1987b42008-11-15 11:12:47 -05002548
Joe Perchesf96637b2013-05-04 22:12:25 -05002549 cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302550 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002551 if (--tcon->tc_count > 0) {
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302552 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002553 return;
2554 }
2555
2556 list_del_init(&tcon->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302557 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002558
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002559 xid = get_xid();
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002560 if (ses->server->ops->tree_disconnect)
2561 ses->server->ops->tree_disconnect(xid, tcon);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002562 _free_xid(xid);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002563
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302564 cifs_fscache_release_super_cookie(tcon);
Steve French9f841592010-07-23 20:37:53 +00002565 tconInfoFree(tcon);
Jeff Laytonf1987b42008-11-15 11:12:47 -05002566 cifs_put_smb_ses(ses);
2567}
2568
Steve French96daf2b2011-05-27 04:34:02 +00002569static struct cifs_tcon *
2570cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
Jeff Laytond00c28d2010-04-24 07:57:44 -04002571{
2572 int rc, xid;
Steve French96daf2b2011-05-27 04:34:02 +00002573 struct cifs_tcon *tcon;
Jeff Laytond00c28d2010-04-24 07:57:44 -04002574
2575 tcon = cifs_find_tcon(ses, volume_info->UNC);
2576 if (tcon) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002577 cifs_dbg(FYI, "Found match on UNC path\n");
Jeff Laytond00c28d2010-04-24 07:57:44 -04002578 /* existing tcon already has a reference */
2579 cifs_put_smb_ses(ses);
2580 if (tcon->seal != volume_info->seal)
Joe Perchesf96637b2013-05-04 22:12:25 -05002581 cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n");
Jeff Laytond00c28d2010-04-24 07:57:44 -04002582 return tcon;
2583 }
2584
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002585 if (!ses->server->ops->tree_connect) {
2586 rc = -ENOSYS;
2587 goto out_fail;
2588 }
2589
Jeff Laytond00c28d2010-04-24 07:57:44 -04002590 tcon = tconInfoAlloc();
2591 if (tcon == NULL) {
2592 rc = -ENOMEM;
2593 goto out_fail;
2594 }
2595
2596 tcon->ses = ses;
2597 if (volume_info->password) {
2598 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
2599 if (!tcon->password) {
2600 rc = -ENOMEM;
2601 goto out_fail;
2602 }
2603 }
2604
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002605 /*
2606 * BB Do we need to wrap session_mutex around this TCon call and Unix
2607 * SetFS as we do on SessSetup and reconnect?
2608 */
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002609 xid = get_xid();
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002610 rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon,
2611 volume_info->local_nls);
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04002612 free_xid(xid);
Joe Perchesf96637b2013-05-04 22:12:25 -05002613 cifs_dbg(FYI, "Tcon rc = %d\n", rc);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002614 if (rc)
2615 goto out_fail;
2616
2617 if (volume_info->nodfs) {
2618 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
Joe Perchesf96637b2013-05-04 22:12:25 -05002619 cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002620 }
2621 tcon->seal = volume_info->seal;
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002622 /*
2623 * We can have only one retry value for a connection to a share so for
2624 * resources mounted more than once to the same server share the last
2625 * value passed in for the retry flag is used.
2626 */
Jeff Laytond00c28d2010-04-24 07:57:44 -04002627 tcon->retry = volume_info->retry;
2628 tcon->nocase = volume_info->nocase;
2629 tcon->local_lease = volume_info->local_lease;
Pavel Shilovsky233839b2012-09-19 06:22:45 -07002630 INIT_LIST_HEAD(&tcon->pending_opens);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002631
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302632 spin_lock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002633 list_add(&tcon->tcon_list, &ses->tcon_list);
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05302634 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytond00c28d2010-04-24 07:57:44 -04002635
Suresh Jayaramand03382c2010-07-05 18:12:27 +05302636 cifs_fscache_get_super_cookie(tcon);
2637
Jeff Laytond00c28d2010-04-24 07:57:44 -04002638 return tcon;
2639
2640out_fail:
2641 tconInfoFree(tcon);
2642 return ERR_PTR(rc);
2643}
2644
Jeff Layton9d002df2010-10-06 19:51:11 -04002645void
2646cifs_put_tlink(struct tcon_link *tlink)
2647{
2648 if (!tlink || IS_ERR(tlink))
2649 return;
2650
2651 if (!atomic_dec_and_test(&tlink->tl_count) ||
2652 test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) {
2653 tlink->tl_time = jiffies;
2654 return;
2655 }
2656
2657 if (!IS_ERR(tlink_tcon(tlink)))
2658 cifs_put_tcon(tlink_tcon(tlink));
2659 kfree(tlink);
2660 return;
2661}
Jeff Laytond00c28d2010-04-24 07:57:44 -04002662
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002663static inline struct tcon_link *
Pavel Shilovskycd518752011-06-09 12:58:53 +04002664cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb)
2665{
2666 return cifs_sb->master_tlink;
2667}
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002668
2669static int
2670compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data)
2671{
2672 struct cifs_sb_info *old = CIFS_SB(sb);
2673 struct cifs_sb_info *new = mnt_data->cifs_sb;
2674
2675 if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK))
2676 return 0;
2677
2678 if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) !=
2679 (new->mnt_cifs_flags & CIFS_MOUNT_MASK))
2680 return 0;
2681
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002682 /*
Jeff Layton5eba8ab2011-10-19 15:30:26 -04002683 * We want to share sb only if we don't specify an r/wsize or
2684 * specified r/wsize is greater than or equal to existing one.
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002685 */
2686 if (new->wsize && new->wsize < old->wsize)
2687 return 0;
2688
Jeff Layton5eba8ab2011-10-19 15:30:26 -04002689 if (new->rsize && new->rsize < old->rsize)
2690 return 0;
2691
Eric W. Biederman1f682332013-02-06 01:20:20 -08002692 if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid))
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002693 return 0;
2694
2695 if (old->mnt_file_mode != new->mnt_file_mode ||
2696 old->mnt_dir_mode != new->mnt_dir_mode)
2697 return 0;
2698
2699 if (strcmp(old->local_nls->charset, new->local_nls->charset))
2700 return 0;
2701
2702 if (old->actimeo != new->actimeo)
2703 return 0;
2704
2705 return 1;
2706}
2707
2708int
2709cifs_match_super(struct super_block *sb, void *data)
2710{
2711 struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data;
2712 struct smb_vol *volume_info;
2713 struct cifs_sb_info *cifs_sb;
2714 struct TCP_Server_Info *tcp_srv;
Steve French96daf2b2011-05-27 04:34:02 +00002715 struct cifs_ses *ses;
2716 struct cifs_tcon *tcon;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002717 struct tcon_link *tlink;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002718 int rc = 0;
2719
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002720 spin_lock(&cifs_tcp_ses_lock);
2721 cifs_sb = CIFS_SB(sb);
2722 tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
2723 if (IS_ERR(tlink)) {
2724 spin_unlock(&cifs_tcp_ses_lock);
2725 return rc;
2726 }
2727 tcon = tlink_tcon(tlink);
2728 ses = tcon->ses;
2729 tcp_srv = ses->server;
2730
2731 volume_info = mnt_data->vol;
2732
Jeff Layton9fa114f2012-11-26 11:09:57 -05002733 if (!match_server(tcp_srv, volume_info) ||
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002734 !match_session(ses, volume_info) ||
2735 !match_tcon(tcon, volume_info->UNC)) {
2736 rc = 0;
2737 goto out;
2738 }
2739
2740 rc = compare_mount_options(sb, mnt_data);
2741out:
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002742 spin_unlock(&cifs_tcp_ses_lock);
Jeff Laytonf484b5d02011-07-11 10:16:34 -04002743 cifs_put_tlink(tlink);
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04002744 return rc;
2745}
2746
Linus Torvalds1da177e2005-04-16 15:20:36 -07002747int
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002748get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path,
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002749 const struct nls_table *nls_codepage, unsigned int *num_referrals,
2750 struct dfs_info3_param **referrals, int remap)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002751{
2752 char *temp_unc;
2753 int rc = 0;
2754
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002755 if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer)
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002756 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002757
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002758 *num_referrals = 0;
2759 *referrals = NULL;
2760
2761 if (ses->ipc_tid == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762 temp_unc = kmalloc(2 /* for slashes */ +
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002763 strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2)
2764 + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002765 if (temp_unc == NULL)
2766 return -ENOMEM;
2767 temp_unc[0] = '\\';
2768 temp_unc[1] = '\\';
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002769 strcpy(temp_unc + 2, ses->serverName);
2770 strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$");
2771 rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL,
2772 nls_codepage);
Joe Perchesf96637b2013-05-04 22:12:25 -05002773 cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002774 kfree(temp_unc);
2775 }
2776 if (rc == 0)
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002777 rc = ses->server->ops->get_dfs_refer(xid, ses, old_path,
2778 referrals, num_referrals,
2779 nls_codepage, remap);
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002780 /*
2781 * BB - map targetUNCs to dfs_info3 structures, here or in
Pavel Shilovskyb669f332012-05-27 20:21:53 +04002782 * ses->server->ops->get_dfs_refer.
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04002783 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002784
2785 return rc;
2786}
2787
Jeff Layton09e50d52008-07-23 10:11:19 -04002788#ifdef CONFIG_DEBUG_LOCK_ALLOC
2789static struct lock_class_key cifs_key[2];
2790static struct lock_class_key cifs_slock_key[2];
2791
2792static inline void
2793cifs_reclassify_socket4(struct socket *sock)
2794{
2795 struct sock *sk = sock->sk;
2796 BUG_ON(sock_owned_by_user(sk));
2797 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
2798 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
2799}
2800
2801static inline void
2802cifs_reclassify_socket6(struct socket *sock)
2803{
2804 struct sock *sk = sock->sk;
2805 BUG_ON(sock_owned_by_user(sk));
2806 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
2807 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
2808}
2809#else
2810static inline void
2811cifs_reclassify_socket4(struct socket *sock)
2812{
2813}
2814
2815static inline void
2816cifs_reclassify_socket6(struct socket *sock)
2817{
2818}
2819#endif
2820
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821/* See RFC1001 section 14 on representation of Netbios names */
Steve French50c2f752007-07-13 00:33:32 +00002822static void rfc1002mangle(char *target, char *source, unsigned int length)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002823{
Steve French50c2f752007-07-13 00:33:32 +00002824 unsigned int i, j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002825
Steve French50c2f752007-07-13 00:33:32 +00002826 for (i = 0, j = 0; i < (length); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002827 /* mask a nibble at a time and encode */
2828 target[j] = 'A' + (0x0F & (source[i] >> 4));
2829 target[j+1] = 'A' + (0x0F & source[i]);
Steve French50c2f752007-07-13 00:33:32 +00002830 j += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002831 }
2832
2833}
2834
Ben Greear3eb9a882010-09-01 17:06:02 -07002835static int
2836bind_socket(struct TCP_Server_Info *server)
2837{
2838 int rc = 0;
2839 if (server->srcaddr.ss_family != AF_UNSPEC) {
2840 /* Bind to the specified local IP address */
2841 struct socket *socket = server->ssocket;
2842 rc = socket->ops->bind(socket,
2843 (struct sockaddr *) &server->srcaddr,
2844 sizeof(server->srcaddr));
2845 if (rc < 0) {
2846 struct sockaddr_in *saddr4;
2847 struct sockaddr_in6 *saddr6;
2848 saddr4 = (struct sockaddr_in *)&server->srcaddr;
2849 saddr6 = (struct sockaddr_in6 *)&server->srcaddr;
2850 if (saddr6->sin6_family == AF_INET6)
Joe Perchesf96637b2013-05-04 22:12:25 -05002851 cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n",
2852 &saddr6->sin6_addr, rc);
Ben Greear3eb9a882010-09-01 17:06:02 -07002853 else
Joe Perchesf96637b2013-05-04 22:12:25 -05002854 cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n",
2855 &saddr4->sin_addr.s_addr, rc);
Ben Greear3eb9a882010-09-01 17:06:02 -07002856 }
2857 }
2858 return rc;
2859}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002860
2861static int
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002862ip_rfc1001_connect(struct TCP_Server_Info *server)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002863{
2864 int rc = 0;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002865 /*
2866 * some servers require RFC1001 sessinit before sending
2867 * negprot - BB check reconnection in case where second
2868 * sessinit is sent but no second negprot
2869 */
2870 struct rfc1002_session_packet *ses_init_buf;
2871 struct smb_hdr *smb_buf;
2872 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2873 GFP_KERNEL);
2874 if (ses_init_buf) {
2875 ses_init_buf->trailer.session_req.called_len = 32;
2876
2877 if (server->server_RFC1001_name &&
2878 server->server_RFC1001_name[0] != 0)
2879 rfc1002mangle(ses_init_buf->trailer.
2880 session_req.called_name,
2881 server->server_RFC1001_name,
2882 RFC1001_NAME_LEN_WITH_NULL);
2883 else
2884 rfc1002mangle(ses_init_buf->trailer.
2885 session_req.called_name,
2886 DEFAULT_CIFS_CALLED_NAME,
2887 RFC1001_NAME_LEN_WITH_NULL);
2888
2889 ses_init_buf->trailer.session_req.calling_len = 32;
2890
2891 /*
2892 * calling name ends in null (byte 16) from old smb
2893 * convention.
2894 */
2895 if (server->workstation_RFC1001_name &&
2896 server->workstation_RFC1001_name[0] != 0)
2897 rfc1002mangle(ses_init_buf->trailer.
2898 session_req.calling_name,
2899 server->workstation_RFC1001_name,
2900 RFC1001_NAME_LEN_WITH_NULL);
2901 else
2902 rfc1002mangle(ses_init_buf->trailer.
2903 session_req.calling_name,
2904 "LINUX_CIFS_CLNT",
2905 RFC1001_NAME_LEN_WITH_NULL);
2906
2907 ses_init_buf->trailer.session_req.scope1 = 0;
2908 ses_init_buf->trailer.session_req.scope2 = 0;
2909 smb_buf = (struct smb_hdr *)ses_init_buf;
2910
2911 /* sizeof RFC1002_SESSION_REQUEST with no scope */
Steve Frenchbe8e3b02011-04-29 05:40:20 +00002912 smb_buf->smb_buf_length = cpu_to_be32(0x81000044);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002913 rc = smb_send(server, smb_buf, 0x44);
2914 kfree(ses_init_buf);
2915 /*
2916 * RFC1001 layer in at least one server
2917 * requires very short break before negprot
2918 * presumably because not expecting negprot
2919 * to follow so fast. This is a simple
2920 * solution that works without
2921 * complicating the code and causes no
2922 * significant slowing down on mount
2923 * for everyone else
2924 */
2925 usleep_range(1000, 2000);
2926 }
2927 /*
2928 * else the negprot may still work without this
2929 * even though malloc failed
2930 */
2931
2932 return rc;
2933}
2934
2935static int
2936generic_ip_connect(struct TCP_Server_Info *server)
2937{
2938 int rc = 0;
Steve French6da97912011-03-13 18:55:55 +00002939 __be16 sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002940 int slen, sfamily;
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002941 struct socket *socket = server->ssocket;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002942 struct sockaddr *saddr;
2943
2944 saddr = (struct sockaddr *) &server->dstaddr;
2945
2946 if (server->dstaddr.ss_family == AF_INET6) {
2947 sport = ((struct sockaddr_in6 *) saddr)->sin6_port;
2948 slen = sizeof(struct sockaddr_in6);
2949 sfamily = AF_INET6;
2950 } else {
2951 sport = ((struct sockaddr_in *) saddr)->sin_port;
2952 slen = sizeof(struct sockaddr_in);
2953 sfamily = AF_INET;
2954 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002955
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002956 if (socket == NULL) {
Rob Landleyf1d0c992011-01-22 15:44:05 -06002957 rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM,
2958 IPPROTO_TCP, &socket, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002959 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05002960 cifs_dbg(VFS, "Error %d creating socket\n", rc);
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002961 server->ssocket = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002962 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002963 }
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002964
2965 /* BB other socket options to set KEEPALIVE, NODELAY? */
Joe Perchesf96637b2013-05-04 22:12:25 -05002966 cifs_dbg(FYI, "Socket created\n");
Jeff Laytonbcf4b102008-12-01 18:42:15 -05002967 server->ssocket = socket;
2968 socket->sk->sk_allocation = GFP_NOFS;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002969 if (sfamily == AF_INET6)
2970 cifs_reclassify_socket6(socket);
2971 else
2972 cifs_reclassify_socket4(socket);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002973 }
2974
Ben Greear3eb9a882010-09-01 17:06:02 -07002975 rc = bind_socket(server);
2976 if (rc < 0)
2977 return rc;
2978
Jeff Laytond5c56052008-12-01 18:42:33 -05002979 /*
2980 * Eventually check for other socket options to change from
2981 * the default. sock_setsockopt not used because it expects
2982 * user space buffer
2983 */
2984 socket->sk->sk_rcvtimeo = 7 * HZ;
Steve Frenchda505c32009-01-19 03:49:35 +00002985 socket->sk->sk_sndtimeo = 5 * HZ;
Steve French6a5fa2362010-01-01 01:28:43 +00002986
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002987 /* make the bufsizes depend on wsize/rsize and max requests */
2988 if (server->noautotune) {
2989 if (socket->sk->sk_sndbuf < (200 * 1024))
2990 socket->sk->sk_sndbuf = 200 * 1024;
2991 if (socket->sk->sk_rcvbuf < (140 * 1024))
2992 socket->sk->sk_rcvbuf = 140 * 1024;
2993 }
2994
Steve French6a5fa2362010-01-01 01:28:43 +00002995 if (server->tcp_nodelay) {
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03002996 int val = 1;
Steve French6a5fa2362010-01-01 01:28:43 +00002997 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2998 (char *)&val, sizeof(val));
2999 if (rc)
Joe Perchesf96637b2013-05-04 22:12:25 -05003000 cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n",
3001 rc);
Steve French6a5fa2362010-01-01 01:28:43 +00003002 }
3003
Joe Perchesf96637b2013-05-04 22:12:25 -05003004 cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n",
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003005 socket->sk->sk_sndbuf,
3006 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
3007
Jeff Laytonee1b3ea2011-06-21 07:18:26 -04003008 rc = socket->ops->connect(socket, saddr, slen, 0);
3009 if (rc < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003010 cifs_dbg(FYI, "Error %d connecting to server\n", rc);
Jeff Laytonee1b3ea2011-06-21 07:18:26 -04003011 sock_release(socket);
3012 server->ssocket = NULL;
3013 return rc;
3014 }
3015
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003016 if (sport == htons(RFC1001_PORT))
3017 rc = ip_rfc1001_connect(server);
Steve French50c2f752007-07-13 00:33:32 +00003018
Linus Torvalds1da177e2005-04-16 15:20:36 -07003019 return rc;
3020}
3021
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003022static int
3023ip_connect(struct TCP_Server_Info *server)
3024{
Steve French6da97912011-03-13 18:55:55 +00003025 __be16 *sport;
Pavel Shilovskya9f1b852010-12-13 19:08:35 +03003026 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr;
3027 struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr;
3028
3029 if (server->dstaddr.ss_family == AF_INET6)
3030 sport = &addr6->sin6_port;
3031 else
3032 sport = &addr->sin_port;
3033
3034 if (*sport == 0) {
3035 int rc;
3036
3037 /* try with 445 port at first */
3038 *sport = htons(CIFS_PORT);
3039
3040 rc = generic_ip_connect(server);
3041 if (rc >= 0)
3042 return rc;
3043
3044 /* if it failed, try with 139 port */
3045 *sport = htons(RFC1001_PORT);
3046 }
3047
3048 return generic_ip_connect(server);
3049}
3050
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003051void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon,
Al Viro2c6292a2011-06-17 09:05:48 -04003052 struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info)
Steve French8af18972007-02-14 04:42:51 +00003053{
3054 /* if we are reconnecting then should we check to see if
3055 * any requested capabilities changed locally e.g. via
3056 * remount but we can not do much about it here
3057 * if they have (even if we could detect it by the following)
3058 * Perhaps we could add a backpointer to array of sb from tcon
3059 * or if we change to make all sb to same share the same
3060 * sb as NFS - then we only have one backpointer to sb.
3061 * What if we wanted to mount the server share twice once with
3062 * and once without posixacls or posix paths? */
3063 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Steve French50c2f752007-07-13 00:33:32 +00003064
Steve Frenchc18c8422007-07-18 23:21:09 +00003065 if (vol_info && vol_info->no_linux_ext) {
3066 tcon->fsUnixInfo.Capability = 0;
3067 tcon->unix_ext = 0; /* Unix Extensions disabled */
Joe Perchesf96637b2013-05-04 22:12:25 -05003068 cifs_dbg(FYI, "Linux protocol extensions disabled\n");
Steve Frenchc18c8422007-07-18 23:21:09 +00003069 return;
3070 } else if (vol_info)
3071 tcon->unix_ext = 1; /* Unix Extensions supported */
3072
3073 if (tcon->unix_ext == 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003074 cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n");
Steve Frenchc18c8422007-07-18 23:21:09 +00003075 return;
3076 }
Steve French50c2f752007-07-13 00:33:32 +00003077
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003078 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
Steve French8af18972007-02-14 04:42:51 +00003079 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
Joe Perchesf96637b2013-05-04 22:12:25 -05003080 cifs_dbg(FYI, "unix caps which server supports %lld\n", cap);
Steve French8af18972007-02-14 04:42:51 +00003081 /* check for reconnect case in which we do not
3082 want to change the mount behavior if we can avoid it */
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003083 if (vol_info == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003084 /* turn off POSIX ACL and PATHNAMES if not set
Steve French8af18972007-02-14 04:42:51 +00003085 originally at mount time */
3086 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
3087 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00003088 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
3089 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003090 cifs_dbg(VFS, "POSIXPATH support change\n");
Steve French8af18972007-02-14 04:42:51 +00003091 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Igor Mammedov11b6d642008-02-15 19:06:04 +00003092 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003093 cifs_dbg(VFS, "possible reconnect error\n");
3094 cifs_dbg(VFS, "server disabled POSIX path support\n");
Igor Mammedov11b6d642008-02-15 19:06:04 +00003095 }
Steve French8af18972007-02-14 04:42:51 +00003096 }
Steve French50c2f752007-07-13 00:33:32 +00003097
Steve French6848b732011-05-26 18:38:54 +00003098 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003099 cifs_dbg(VFS, "per-share encryption not supported yet\n");
Steve French6848b732011-05-26 18:38:54 +00003100
Steve French8af18972007-02-14 04:42:51 +00003101 cap &= CIFS_UNIX_CAP_MASK;
Steve French75865f8c2007-06-24 18:30:48 +00003102 if (vol_info && vol_info->no_psx_acl)
Steve French8af18972007-02-14 04:42:51 +00003103 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00003104 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003105 cifs_dbg(FYI, "negotiated posix acl support\n");
Al Viro2c6292a2011-06-17 09:05:48 -04003106 if (cifs_sb)
3107 cifs_sb->mnt_cifs_flags |=
3108 CIFS_MOUNT_POSIXACL;
Steve French8af18972007-02-14 04:42:51 +00003109 }
3110
Steve French75865f8c2007-06-24 18:30:48 +00003111 if (vol_info && vol_info->posix_paths == 0)
Steve French8af18972007-02-14 04:42:51 +00003112 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
Steve French75865f8c2007-06-24 18:30:48 +00003113 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003114 cifs_dbg(FYI, "negotiate posix pathnames\n");
Al Viro2c6292a2011-06-17 09:05:48 -04003115 if (cifs_sb)
3116 cifs_sb->mnt_cifs_flags |=
Steve French8af18972007-02-14 04:42:51 +00003117 CIFS_MOUNT_POSIX_PATHS;
3118 }
Steve French50c2f752007-07-13 00:33:32 +00003119
Joe Perchesf96637b2013-05-04 22:12:25 -05003120 cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap);
Steve French8af18972007-02-14 04:42:51 +00003121#ifdef CONFIG_CIFS_DEBUG2
Steve French75865f8c2007-06-24 18:30:48 +00003122 if (cap & CIFS_UNIX_FCNTL_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003123 cifs_dbg(FYI, "FCNTL cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003124 if (cap & CIFS_UNIX_EXTATTR_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003125 cifs_dbg(FYI, "EXTATTR cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003126 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003127 cifs_dbg(FYI, "POSIX path cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003128 if (cap & CIFS_UNIX_XATTR_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003129 cifs_dbg(FYI, "XATTR cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003130 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003131 cifs_dbg(FYI, "POSIX ACL cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003132 if (cap & CIFS_UNIX_LARGE_READ_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003133 cifs_dbg(FYI, "very large read cap\n");
Steve French75865f8c2007-06-24 18:30:48 +00003134 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003135 cifs_dbg(FYI, "very large write cap\n");
Steve French6848b732011-05-26 18:38:54 +00003136 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003137 cifs_dbg(FYI, "transport encryption cap\n");
Steve French6848b732011-05-26 18:38:54 +00003138 if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)
Joe Perchesf96637b2013-05-04 22:12:25 -05003139 cifs_dbg(FYI, "mandatory transport encryption cap\n");
Steve French8af18972007-02-14 04:42:51 +00003140#endif /* CIFS_DEBUG2 */
3141 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
Steve French442aa312007-09-24 20:25:46 +00003142 if (vol_info == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003143 cifs_dbg(FYI, "resetting capabilities failed\n");
Steve French442aa312007-09-24 20:25:46 +00003144 } else
Joe Perchesf96637b2013-05-04 22:12:25 -05003145 cifs_dbg(VFS, "Negotiating Unix capabilities with the server failed. Consider mounting with the Unix Extensions disabled if problems are found by specifying the nounix mount option.\n");
Steve French5a44b312007-09-20 15:16:24 +00003146
Steve French8af18972007-02-14 04:42:51 +00003147 }
3148 }
3149}
3150
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003151void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
3152 struct cifs_sb_info *cifs_sb)
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04003153{
Jeff Layton2de970f2010-10-06 19:51:12 -04003154 INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks);
3155
Al Viro2ced6f62011-06-17 09:20:04 -04003156 spin_lock_init(&cifs_sb->tlink_tree_lock);
3157 cifs_sb->tlink_tree = RB_ROOT;
3158
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003159 /*
Jeff Layton5eba8ab2011-10-19 15:30:26 -04003160 * Temporarily set r/wsize for matching superblock. If we end up using
3161 * new sb then client will later negotiate it downward if needed.
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003162 */
Jeff Layton5eba8ab2011-10-19 15:30:26 -04003163 cifs_sb->rsize = pvolume_info->rsize;
Pavel Shilovsky25c7f412011-05-26 23:35:47 +04003164 cifs_sb->wsize = pvolume_info->wsize;
3165
Steve French3b795212008-11-13 19:45:32 +00003166 cifs_sb->mnt_uid = pvolume_info->linux_uid;
3167 cifs_sb->mnt_gid = pvolume_info->linux_gid;
3168 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
3169 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
Joe Perchesf96637b2013-05-04 22:12:25 -05003170 cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n",
3171 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
Steve French3b795212008-11-13 19:45:32 +00003172
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05303173 cifs_sb->actimeo = pvolume_info->actimeo;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003174 cifs_sb->local_nls = pvolume_info->local_nls;
Suresh Jayaraman6d20e842010-12-01 14:42:28 +05303175
Steve French3b795212008-11-13 19:45:32 +00003176 if (pvolume_info->noperm)
3177 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
3178 if (pvolume_info->setuids)
3179 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
3180 if (pvolume_info->server_ino)
3181 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
3182 if (pvolume_info->remap)
3183 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
3184 if (pvolume_info->no_xattr)
3185 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
3186 if (pvolume_info->sfu_emul)
3187 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
3188 if (pvolume_info->nobrl)
3189 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
Steve Frenchbe652442009-02-23 15:21:59 +00003190 if (pvolume_info->nostrictsync)
Steve French4717bed2009-02-24 14:44:19 +00003191 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
Steve French13a6e422008-12-02 17:24:33 +00003192 if (pvolume_info->mand_lock)
3193 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
Pavel Shilovskyd4ffff12011-05-26 06:02:00 +00003194 if (pvolume_info->rwpidforward)
3195 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD;
Steve French3b795212008-11-13 19:45:32 +00003196 if (pvolume_info->cifs_acl)
3197 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003198 if (pvolume_info->backupuid_specified) {
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05003199 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003200 cifs_sb->mnt_backupuid = pvolume_info->backupuid;
3201 }
3202 if (pvolume_info->backupgid_specified) {
Shirish Pargaonkar3d3ea8e2011-09-26 09:56:44 -05003203 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID;
Sachin Prabhu3c7c87f2012-04-24 15:28:14 +01003204 cifs_sb->mnt_backupgid = pvolume_info->backupgid;
3205 }
Steve French3b795212008-11-13 19:45:32 +00003206 if (pvolume_info->override_uid)
3207 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
3208 if (pvolume_info->override_gid)
3209 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
3210 if (pvolume_info->dynperm)
3211 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
Suresh Jayaramanfa1df752010-07-05 18:13:36 +05303212 if (pvolume_info->fsc)
3213 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
Jeff Layton0eb8a132010-10-06 19:51:12 -04003214 if (pvolume_info->multiuser)
3215 cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER |
3216 CIFS_MOUNT_NO_PERM);
Pavel Shilovskyd39454f2011-01-24 14:16:35 -05003217 if (pvolume_info->strict_io)
3218 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO;
Steve French3b795212008-11-13 19:45:32 +00003219 if (pvolume_info->direct_io) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003220 cifs_dbg(FYI, "mounting share using direct i/o\n");
Steve French3b795212008-11-13 19:45:32 +00003221 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
3222 }
Stefan Metzmacher736a3322010-07-30 14:56:00 +02003223 if (pvolume_info->mfsymlinks) {
3224 if (pvolume_info->sfu_emul) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003225 cifs_dbg(VFS, "mount option mfsymlinks ignored if sfu mount option is used\n");
Stefan Metzmacher736a3322010-07-30 14:56:00 +02003226 } else {
3227 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS;
3228 }
3229 }
Steve French3b795212008-11-13 19:45:32 +00003230
3231 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
Joe Perchesf96637b2013-05-04 22:12:25 -05003232 cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n");
Jeff Laytonb1c8d2b2008-10-22 13:57:07 -04003233}
3234
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003235static void
3236cleanup_volume_info_contents(struct smb_vol *volume_info)
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003237{
Sean Finneyb9468452011-04-11 13:19:32 +00003238 kfree(volume_info->username);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003239 kzfree(volume_info->password);
Jesper Juhl95c75452011-08-27 18:58:34 +02003240 kfree(volume_info->UNC);
Sean Finneyb9468452011-04-11 13:19:32 +00003241 kfree(volume_info->domainname);
3242 kfree(volume_info->iocharset);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003243 kfree(volume_info->prepath);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003244}
3245
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003246void
3247cifs_cleanup_volume_info(struct smb_vol *volume_info)
3248{
3249 if (!volume_info)
3250 return;
3251 cleanup_volume_info_contents(volume_info);
3252 kfree(volume_info);
3253}
3254
3255
Steve French2d6d5892009-04-09 00:36:44 +00003256#ifdef CONFIG_CIFS_DFS_UPCALL
Steve French6d3ea7e2012-11-28 22:34:41 -06003257/*
3258 * cifs_build_path_to_root returns full path to root when we do not have an
3259 * exiting connection (tcon)
3260 */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003261static char *
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003262build_unc_path_to_root(const struct smb_vol *vol,
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003263 const struct cifs_sb_info *cifs_sb)
3264{
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003265 char *full_path, *pos;
Jeff Layton839db3d2012-12-10 06:10:45 -05003266 unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0;
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003267 unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003268
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003269 full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003270 if (full_path == NULL)
3271 return ERR_PTR(-ENOMEM);
3272
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003273 strncpy(full_path, vol->UNC, unc_len);
3274 pos = full_path + unc_len;
3275
3276 if (pplen) {
Jeff Layton1fc29ba2013-05-31 10:00:18 -04003277 *pos = CIFS_DIR_SEP(cifs_sb);
3278 strncpy(pos + 1, vol->prepath, pplen);
Jeff Laytonb2a0fa12011-07-06 08:10:36 -04003279 pos += pplen;
3280 }
3281
3282 *pos = '\0'; /* add trailing null */
Steve Frenchf87d39d2011-05-27 03:50:55 +00003283 convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
Joe Perchesf96637b2013-05-04 22:12:25 -05003284 cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003285 return full_path;
3286}
Sean Finneydd613942011-04-11 13:19:30 +00003287
3288/*
3289 * Perform a dfs referral query for a share and (optionally) prefix
3290 *
Sean Finney046462a2011-04-11 13:19:33 +00003291 * If a referral is found, cifs_sb->mountdata will be (re-)allocated
3292 * to a string containing updated options for the submount. Otherwise it
3293 * will be left untouched.
Sean Finneydd613942011-04-11 13:19:30 +00003294 *
3295 * Returns the rc from get_dfs_path to the caller, which can be used to
3296 * determine whether there were referrals.
3297 */
3298static int
Pavel Shilovskyb669f332012-05-27 20:21:53 +04003299expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses,
Sean Finneydd613942011-04-11 13:19:30 +00003300 struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb,
Sean Finney046462a2011-04-11 13:19:33 +00003301 int check_prefix)
Sean Finneydd613942011-04-11 13:19:30 +00003302{
3303 int rc;
3304 unsigned int num_referrals = 0;
3305 struct dfs_info3_param *referrals = NULL;
3306 char *full_path = NULL, *ref_path = NULL, *mdata = NULL;
3307
3308 full_path = build_unc_path_to_root(volume_info, cifs_sb);
3309 if (IS_ERR(full_path))
3310 return PTR_ERR(full_path);
3311
3312 /* For DFS paths, skip the first '\' of the UNC */
3313 ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1;
3314
Pavel Shilovskyb669f332012-05-27 20:21:53 +04003315 rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls,
Sean Finneydd613942011-04-11 13:19:30 +00003316 &num_referrals, &referrals,
3317 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
3318
3319 if (!rc && num_referrals > 0) {
3320 char *fake_devname = NULL;
3321
3322 mdata = cifs_compose_mount_options(cifs_sb->mountdata,
3323 full_path + 1, referrals,
3324 &fake_devname);
3325
3326 free_dfs_info_array(referrals, num_referrals);
Sean Finney046462a2011-04-11 13:19:33 +00003327
Sean Finneydd613942011-04-11 13:19:30 +00003328 if (IS_ERR(mdata)) {
3329 rc = PTR_ERR(mdata);
3330 mdata = NULL;
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003331 } else {
3332 cleanup_volume_info_contents(volume_info);
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003333 rc = cifs_setup_volume_info(volume_info, mdata,
3334 fake_devname);
Sean Finneydd613942011-04-11 13:19:30 +00003335 }
Jeff Laytonb9bce2e2011-07-06 08:10:39 -04003336 kfree(fake_devname);
3337 kfree(cifs_sb->mountdata);
Sean Finney046462a2011-04-11 13:19:33 +00003338 cifs_sb->mountdata = mdata;
Sean Finneydd613942011-04-11 13:19:30 +00003339 }
3340 kfree(full_path);
3341 return rc;
3342}
Steve French2d6d5892009-04-09 00:36:44 +00003343#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003344
Jeff Layton04db79b2011-07-06 08:10:38 -04003345static int
3346cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
3347 const char *devname)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003348{
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003349 int rc = 0;
Sean Finneydd613942011-04-11 13:19:30 +00003350
Jeff Layton04db79b2011-07-06 08:10:38 -04003351 if (cifs_parse_mount_options(mount_data, devname, volume_info))
3352 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003353
Jeff Layton7586b762008-12-01 18:41:49 -05003354 if (volume_info->nullauth) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003355 cifs_dbg(FYI, "Anonymous login\n");
Jeff Layton04febab2012-01-17 16:09:15 -05003356 kfree(volume_info->username);
3357 volume_info->username = NULL;
Jeff Layton7586b762008-12-01 18:41:49 -05003358 } else if (volume_info->username) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003359 /* BB fixme parse for domain name here */
Joe Perchesf96637b2013-05-04 22:12:25 -05003360 cifs_dbg(FYI, "Username: %s\n", volume_info->username);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003361 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -05003362 cifs_dbg(VFS, "No username specified\n");
Steve French50c2f752007-07-13 00:33:32 +00003363 /* In userspace mount helper we can get user name from alternate
3364 locations such as env variables and files on disk */
Jeff Layton04db79b2011-07-06 08:10:38 -04003365 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366 }
3367
Linus Torvalds1da177e2005-04-16 15:20:36 -07003368 /* this is needed for ASCII cp to Unicode converts */
Jeff Layton7586b762008-12-01 18:41:49 -05003369 if (volume_info->iocharset == NULL) {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003370 /* load_nls_default cannot return null */
3371 volume_info->local_nls = load_nls_default();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003372 } else {
Jeff Laytona5fc4ce2010-04-24 07:57:42 -04003373 volume_info->local_nls = load_nls(volume_info->iocharset);
3374 if (volume_info->local_nls == NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003375 cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n",
Joe Perchesb6b38f72010-04-21 03:50:45 +00003376 volume_info->iocharset);
Jeff Layton04db79b2011-07-06 08:10:38 -04003377 return -ELIBACC;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378 }
3379 }
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003380
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003381 return rc;
Jeff Layton04db79b2011-07-06 08:10:38 -04003382}
3383
3384struct smb_vol *
3385cifs_get_volume_info(char *mount_data, const char *devname)
3386{
3387 int rc;
3388 struct smb_vol *volume_info;
3389
Jeff Layton6ee95422012-11-26 11:09:57 -05003390 volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL);
Jeff Layton04db79b2011-07-06 08:10:38 -04003391 if (!volume_info)
3392 return ERR_PTR(-ENOMEM);
3393
3394 rc = cifs_setup_volume_info(volume_info, mount_data, devname);
3395 if (rc) {
3396 cifs_cleanup_volume_info(volume_info);
3397 volume_info = ERR_PTR(rc);
3398 }
3399
3400 return volume_info;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003401}
3402
3403int
Al Viro2c6292a2011-06-17 09:05:48 -04003404cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003405{
Jeff Layton1daaae82012-03-21 06:30:40 -04003406 int rc;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003407 unsigned int xid;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003408 struct cifs_ses *ses;
Steve French96daf2b2011-05-27 04:34:02 +00003409 struct cifs_tcon *tcon;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003410 struct TCP_Server_Info *server;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003411 char *full_path;
3412 struct tcon_link *tlink;
3413#ifdef CONFIG_CIFS_DFS_UPCALL
3414 int referral_walks_count = 0;
Jeff Layton20547492011-07-09 12:21:07 -04003415#endif
Al Virodd854462011-06-17 08:24:42 -04003416
3417 rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
3418 if (rc)
3419 return rc;
3420
Jeff Layton20547492011-07-09 12:21:07 -04003421#ifdef CONFIG_CIFS_DFS_UPCALL
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003422try_mount_again:
3423 /* cleanup activities if we're chasing a referral */
3424 if (referral_walks_count) {
3425 if (tcon)
3426 cifs_put_tcon(tcon);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003427 else if (ses)
3428 cifs_put_smb_ses(ses);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003429
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003430 free_xid(xid);
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003431 }
3432#endif
Jeff Layton1daaae82012-03-21 06:30:40 -04003433 rc = 0;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003434 tcon = NULL;
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003435 ses = NULL;
3436 server = NULL;
Pavel Shilovsky724d9f12011-05-05 09:55:12 +00003437 full_path = NULL;
3438 tlink = NULL;
3439
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003440 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003441
Jeff Layton63c038c2008-12-01 18:41:46 -05003442 /* get a reference to a tcp session */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003443 server = cifs_get_tcp_session(volume_info);
3444 if (IS_ERR(server)) {
3445 rc = PTR_ERR(server);
Al Virodd854462011-06-17 08:24:42 -04003446 bdi_destroy(&cifs_sb->bdi);
Jeff Layton63c038c2008-12-01 18:41:46 -05003447 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003448 }
3449
Jeff Layton36988c72010-04-24 07:57:43 -04003450 /* get a reference to a SMB session */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003451 ses = cifs_get_smb_ses(server, volume_info);
3452 if (IS_ERR(ses)) {
3453 rc = PTR_ERR(ses);
3454 ses = NULL;
Jeff Layton36988c72010-04-24 07:57:43 -04003455 goto mount_fail_check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003456 }
Steve French50c2f752007-07-13 00:33:32 +00003457
Jeff Laytond00c28d2010-04-24 07:57:44 -04003458 /* search for existing tcon to this server share */
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003459 tcon = cifs_get_tcon(ses, volume_info);
Jeff Laytond00c28d2010-04-24 07:57:44 -04003460 if (IS_ERR(tcon)) {
3461 rc = PTR_ERR(tcon);
3462 tcon = NULL;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003463 goto remote_path_check;
Jeff Laytond00c28d2010-04-24 07:57:44 -04003464 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003465
Steve French6848b732011-05-26 18:38:54 +00003466 /* tell server which Unix caps we support */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003467 if (cap_unix(tcon->ses)) {
Steve French6848b732011-05-26 18:38:54 +00003468 /* reset of caps checks mount to see if unix extensions
3469 disabled for just this mount */
Al Viro2c6292a2011-06-17 09:05:48 -04003470 reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info);
Steve French6848b732011-05-26 18:38:54 +00003471 if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) &&
3472 (le64_to_cpu(tcon->fsUnixInfo.Capability) &
3473 CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) {
3474 rc = -EACCES;
3475 goto mount_fail_check;
3476 }
3477 } else
3478 tcon->unix_ext = 0; /* server does not support them */
3479
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003480 /* do not care if a following call succeed - informational */
3481 if (!tcon->ipc && server->ops->qfs_tcon)
3482 server->ops->qfs_tcon(xid, tcon);
Steve Frenchd82c2df2008-11-15 00:07:26 +00003483
Pavel Shilovsky24985c52012-09-18 16:20:28 -07003484 cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info);
3485 cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info);
Jeff Laytonf7910cb2011-05-19 16:22:58 -04003486
Jeff Layton66bfaad2011-10-19 15:30:35 -04003487 /* tune readahead according to rsize */
Jeff Layton8f714652012-05-01 17:41:49 -04003488 cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_CACHE_SIZE;
Jeff Layton03ceace2010-12-06 21:07:33 -05003489
Igor Mammedove4cce942009-02-10 14:10:26 +03003490remote_path_check:
3491#ifdef CONFIG_CIFS_DFS_UPCALL
3492 /*
3493 * Perform an unconditional check for whether there are DFS
3494 * referrals for this path without prefix, to provide support
3495 * for DFS referrals from w2k8 servers which don't seem to respond
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003496 * with PATH_NOT_COVERED to requests that include the prefix.
3497 * Chase the referral if found, otherwise continue normally.
Steve Frenchd036f502009-04-03 03:12:08 +00003498 */
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003499 if (referral_walks_count == 0) {
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003500 int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb,
3501 false);
Steve Frencheeac8042006-01-13 21:34:58 -08003502 if (!refrc) {
Steve French4523cc32007-04-30 20:13:06 +00003503 referral_walks_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003504 goto try_mount_again;
3505 }
3506 }
3507#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003508
Steve Frenchf87d39d2011-05-27 03:50:55 +00003509 /* check if a whole path is not remote */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003510 if (!rc && tcon) {
Pavel Shilovsky68889f22012-05-25 14:40:22 +04003511 if (!server->ops->is_path_accessible) {
3512 rc = -ENOSYS;
3513 goto mount_fail_check;
3514 }
Steve French6d3ea7e2012-11-28 22:34:41 -06003515 /*
3516 * cifs_build_path_to_root works only when we have a valid tcon
3517 */
3518 full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003519 if (full_path == NULL) {
3520 rc = -ENOMEM;
3521 goto mount_fail_check;
3522 }
Pavel Shilovsky68889f22012-05-25 14:40:22 +04003523 rc = server->ops->is_path_accessible(xid, tcon, cifs_sb,
3524 full_path);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003525 if (rc != 0 && rc != -EREMOTE) {
3526 kfree(full_path);
3527 goto mount_fail_check;
3528 }
3529 kfree(full_path);
3530 }
3531
3532 /* get referral if needed */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003533 if (rc == -EREMOTE) {
3534#ifdef CONFIG_CIFS_DFS_UPCALL
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003535 if (referral_walks_count > MAX_NESTED_LINKS) {
3536 /*
3537 * BB: when we implement proper loop detection,
3538 * we will remove this check. But now we need it
3539 * to prevent an indefinite loop if 'DFS tree' is
3540 * misconfigured (i.e. has loops).
3541 */
3542 rc = -ELOOP;
3543 goto mount_fail_check;
3544 }
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003545
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003546 rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true);
Jeff Layton7b91e262009-07-23 15:22:30 -04003547
Sean Finneydd613942011-04-11 13:19:30 +00003548 if (!rc) {
Igor Mammedov5c2503a2009-04-21 19:31:05 +04003549 referral_walks_count++;
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003550 goto try_mount_again;
3551 }
Sean Finneydd613942011-04-11 13:19:30 +00003552 goto mount_fail_check;
Steve Frenchd036f502009-04-03 03:12:08 +00003553#else /* No DFS support, return error on mount */
3554 rc = -EOPNOTSUPP;
3555#endif
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003556 }
3557
Jeff Layton9d002df2010-10-06 19:51:11 -04003558 if (rc)
3559 goto mount_fail_check;
3560
3561 /* now, hang the tcon off of the superblock */
3562 tlink = kzalloc(sizeof *tlink, GFP_KERNEL);
3563 if (tlink == NULL) {
3564 rc = -ENOMEM;
3565 goto mount_fail_check;
3566 }
3567
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003568 tlink->tl_uid = ses->linux_uid;
Jeff Layton9d002df2010-10-06 19:51:11 -04003569 tlink->tl_tcon = tcon;
3570 tlink->tl_time = jiffies;
3571 set_bit(TCON_LINK_MASTER, &tlink->tl_flags);
3572 set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3573
Jeff Layton413e6612010-10-28 13:33:38 -04003574 cifs_sb->master_tlink = tlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04003575 spin_lock(&cifs_sb->tlink_tree_lock);
3576 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
3577 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton413e6612010-10-28 13:33:38 -04003578
Jeff Laytonda472fc2012-03-23 14:40:53 -04003579 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
Jeff Layton2de970f2010-10-06 19:51:12 -04003580 TLINK_IDLE_EXPIRE);
3581
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003582mount_fail_check:
3583 /* on error free sesinfo and tcon struct if needed */
3584 if (rc) {
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003585 /* If find_unc succeeded then rc == 0 so we can not end */
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003586 /* up accidentally freeing someone elses tcon struct */
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003587 if (tcon)
3588 cifs_put_tcon(tcon);
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003589 else if (ses)
3590 cifs_put_smb_ses(ses);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003591 else
Pavel Shilovskyaf4281d2012-05-27 20:48:35 +04003592 cifs_put_tcp_session(server);
Al Virodd854462011-06-17 08:24:42 -04003593 bdi_destroy(&cifs_sb->bdi);
Igor Mammedov1bfe73c2009-04-01 17:54:42 +04003594 }
3595
Linus Torvalds1da177e2005-04-16 15:20:36 -07003596out:
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +04003597 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003598 return rc;
3599}
3600
Jeff Layton8d1bca32011-06-11 21:17:10 -04003601/*
3602 * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon
3603 * pointer may be NULL.
3604 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003605int
Pavel Shilovsky2e6e02a2012-05-25 11:11:39 +04003606CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
Steve French96daf2b2011-05-27 04:34:02 +00003607 const char *tree, struct cifs_tcon *tcon,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003608 const struct nls_table *nls_codepage)
3609{
3610 struct smb_hdr *smb_buffer;
3611 struct smb_hdr *smb_buffer_response;
3612 TCONX_REQ *pSMB;
3613 TCONX_RSP *pSMBr;
3614 unsigned char *bcc_ptr;
3615 int rc = 0;
Jeff Layton690c5222011-01-20 13:36:51 -05003616 int length;
3617 __u16 bytes_left, count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003618
3619 if (ses == NULL)
3620 return -EIO;
3621
3622 smb_buffer = cifs_buf_get();
Steve Frenchca43e3b2009-09-01 17:20:50 +00003623 if (smb_buffer == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003624 return -ENOMEM;
Steve Frenchca43e3b2009-09-01 17:20:50 +00003625
Linus Torvalds1da177e2005-04-16 15:20:36 -07003626 smb_buffer_response = smb_buffer;
3627
3628 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3629 NULL /*no tid */ , 4 /*wct */ );
Steve French1982c342005-08-17 12:38:22 -07003630
Pavel Shilovsky88257362012-05-23 14:01:59 +04003631 smb_buffer->Mid = get_next_mid(ses->server);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003632 smb_buffer->Uid = ses->Suid;
3633 pSMB = (TCONX_REQ *) smb_buffer;
3634 pSMBr = (TCONX_RSP *) smb_buffer_response;
3635
3636 pSMB->AndXCommand = 0xFF;
3637 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003638 bcc_ptr = &pSMB->Password[0];
Jeff Layton8d1bca32011-06-11 21:17:10 -04003639 if (!tcon || (ses->server->sec_mode & SECMODE_USER)) {
Steve Frencheeac8042006-01-13 21:34:58 -08003640 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
Steve French7c7b25b2006-06-01 19:20:10 +00003641 *bcc_ptr = 0; /* password is null byte */
Steve Frencheeac8042006-01-13 21:34:58 -08003642 bcc_ptr++; /* skip password */
Steve French7c7b25b2006-06-01 19:20:10 +00003643 /* already aligned so no need to do it below */
Steve Frencheeac8042006-01-13 21:34:58 -08003644 } else {
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003645 pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE);
Steve Frencheeac8042006-01-13 21:34:58 -08003646 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3647 specified as required (when that support is added to
3648 the vfs in the future) as only NTLM or the much
Steve French7c7b25b2006-06-01 19:20:10 +00003649 weaker LANMAN (which we do not send by default) is accepted
Steve Frencheeac8042006-01-13 21:34:58 -08003650 by Samba (not sure whether other servers allow
3651 NTLMv2 password here) */
Steve French7c7b25b2006-06-01 19:20:10 +00003652#ifdef CONFIG_CIFS_WEAK_PW_HASH
Jeff Layton04912d62010-04-24 07:57:45 -04003653 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
Jeff Layton3f618222013-06-12 19:52:14 -05003654 (ses->sectype == LANMAN))
Shirish Pargaonkard3ba50b2010-10-27 15:20:36 -05003655 calc_lanman_hash(tcon->password, ses->server->cryptkey,
Steve French96daf2b2011-05-27 04:34:02 +00003656 ses->server->sec_mode &
Jeff Layton4e53a3f2008-12-05 20:41:21 -05003657 SECMODE_PW_ENCRYPT ? true : false,
3658 bcc_ptr);
Steve French7c7b25b2006-06-01 19:20:10 +00003659 else
3660#endif /* CIFS_WEAK_PW_HASH */
Shirish Pargaonkaree2c9252011-01-27 09:58:04 -06003661 rc = SMBNTencrypt(tcon->password, ses->server->cryptkey,
Shirish Pargaonkar9ef59922011-10-20 13:21:59 -05003662 bcc_ptr, nls_codepage);
Steve Frencheeac8042006-01-13 21:34:58 -08003663
Shirish Pargaonkar540b2e32011-01-18 22:33:54 -06003664 bcc_ptr += CIFS_AUTH_RESP_SIZE;
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003665 if (ses->capabilities & CAP_UNICODE) {
Steve French7c7b25b2006-06-01 19:20:10 +00003666 /* must align unicode strings */
3667 *bcc_ptr = 0; /* null byte password */
3668 bcc_ptr++;
3669 }
Steve Frencheeac8042006-01-13 21:34:58 -08003670 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003671
Jeff Layton38d77c52013-05-26 07:01:00 -04003672 if (ses->server->sign)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003673 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3674
3675 if (ses->capabilities & CAP_STATUS32) {
3676 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3677 }
3678 if (ses->capabilities & CAP_DFS) {
3679 smb_buffer->Flags2 |= SMBFLG2_DFS;
3680 }
3681 if (ses->capabilities & CAP_UNICODE) {
3682 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3683 length =
Steve Frenchacbbb762012-01-18 22:32:33 -06003684 cifs_strtoUTF16((__le16 *) bcc_ptr, tree,
Steve French50c2f752007-07-13 00:33:32 +00003685 6 /* max utf8 char length in bytes */ *
Steve Frencha878fb22006-05-30 18:04:19 +00003686 (/* server len*/ + 256 /* share len */), nls_codepage);
3687 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003688 bcc_ptr += 2; /* skip trailing null */
3689 } else { /* ASCII */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003690 strcpy(bcc_ptr, tree);
3691 bcc_ptr += strlen(tree) + 1;
3692 }
3693 strcpy(bcc_ptr, "?????");
3694 bcc_ptr += strlen("?????");
3695 bcc_ptr += 1;
3696 count = bcc_ptr - &pSMB->Password[0];
Steve Frenchbe8e3b02011-04-29 05:40:20 +00003697 pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu(
3698 pSMB->hdr.smb_buf_length) + count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003699 pSMB->ByteCount = cpu_to_le16(count);
3700
Steve French133672e2007-11-13 22:41:37 +00003701 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
Jeff Layton77499812011-01-11 07:24:23 -05003702 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003703
Linus Torvalds1da177e2005-04-16 15:20:36 -07003704 /* above now done in SendReceive */
3705 if ((rc == 0) && (tcon != NULL)) {
Steve French0e0d2cf2009-05-01 05:27:32 +00003706 bool is_unicode;
3707
Linus Torvalds1da177e2005-04-16 15:20:36 -07003708 tcon->tidStatus = CifsGood;
Steve French3b795212008-11-13 19:45:32 +00003709 tcon->need_reconnect = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003710 tcon->tid = smb_buffer_response->Tid;
3711 bcc_ptr = pByteArea(smb_buffer_response);
Jeff Layton690c5222011-01-20 13:36:51 -05003712 bytes_left = get_bcc(smb_buffer_response);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003713 length = strnlen(bcc_ptr, bytes_left - 2);
Steve French0e0d2cf2009-05-01 05:27:32 +00003714 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
3715 is_unicode = true;
3716 else
3717 is_unicode = false;
3718
Jeff Laytoncc20c032009-04-30 07:16:21 -04003719
Steve French50c2f752007-07-13 00:33:32 +00003720 /* skip service field (NB: this field is always ASCII) */
Steve French7f8ed422007-09-28 22:28:55 +00003721 if (length == 3) {
3722 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3723 (bcc_ptr[2] == 'C')) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003724 cifs_dbg(FYI, "IPC connection\n");
Steve French7f8ed422007-09-28 22:28:55 +00003725 tcon->ipc = 1;
3726 }
3727 } else if (length == 2) {
3728 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3729 /* the most common case */
Joe Perchesf96637b2013-05-04 22:12:25 -05003730 cifs_dbg(FYI, "disk share connection\n");
Steve French7f8ed422007-09-28 22:28:55 +00003731 }
3732 }
Steve French50c2f752007-07-13 00:33:32 +00003733 bcc_ptr += length + 1;
Jeff Laytoncc20c032009-04-30 07:16:21 -04003734 bytes_left -= (length + 1);
Zhao Hongjiang46b51d02013-06-24 01:57:47 -05003735 strlcpy(tcon->treeName, tree, sizeof(tcon->treeName));
Jeff Laytoncc20c032009-04-30 07:16:21 -04003736
3737 /* mostly informational -- no need to fail on error here */
Jeff Layton90a98b22009-07-20 13:40:52 -04003738 kfree(tcon->nativeFileSystem);
Steve Frenchacbbb762012-01-18 22:32:33 -06003739 tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr,
Steve French0e0d2cf2009-05-01 05:27:32 +00003740 bytes_left, is_unicode,
Jeff Laytoncc20c032009-04-30 07:16:21 -04003741 nls_codepage);
3742
Joe Perchesf96637b2013-05-04 22:12:25 -05003743 cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem);
Jeff Laytoncc20c032009-04-30 07:16:21 -04003744
Steve Frenchfb8c4b12007-07-10 01:16:18 +00003745 if ((smb_buffer_response->WordCount == 3) ||
Steve French1a4e15a2006-10-12 21:33:51 +00003746 (smb_buffer_response->WordCount == 7))
3747 /* field is in same location */
Steve French39798772006-05-31 22:40:51 +00003748 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3749 else
3750 tcon->Flags = 0;
Joe Perchesf96637b2013-05-04 22:12:25 -05003751 cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003752 } else if ((rc == 0) && tcon == NULL) {
Steve French50c2f752007-07-13 00:33:32 +00003753 /* all we need to save for IPC$ connection */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003754 ses->ipc_tid = smb_buffer_response->Tid;
3755 }
3756
Mariusz Kozlowskia8a11d32007-10-03 16:41:24 +00003757 cifs_buf_release(smb_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003758 return rc;
3759}
3760
Al Viro2a9b9952011-06-17 09:27:16 -04003761void
3762cifs_umount(struct cifs_sb_info *cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003763{
Jeff Laytonb647c352010-10-28 11:16:44 -04003764 struct rb_root *root = &cifs_sb->tlink_tree;
3765 struct rb_node *node;
3766 struct tcon_link *tlink;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003767
Jeff Layton2de970f2010-10-06 19:51:12 -04003768 cancel_delayed_work_sync(&cifs_sb->prune_tlinks);
3769
Jeff Laytonb647c352010-10-28 11:16:44 -04003770 spin_lock(&cifs_sb->tlink_tree_lock);
3771 while ((node = rb_first(root))) {
3772 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3773 cifs_get_tlink(tlink);
3774 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
3775 rb_erase(node, root);
Steve French50c2f752007-07-13 00:33:32 +00003776
Jeff Laytonb647c352010-10-28 11:16:44 -04003777 spin_unlock(&cifs_sb->tlink_tree_lock);
3778 cifs_put_tlink(tlink);
3779 spin_lock(&cifs_sb->tlink_tree_lock);
3780 }
3781 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003782
Al Virodd854462011-06-17 08:24:42 -04003783 bdi_destroy(&cifs_sb->bdi);
Al Virod757d712011-06-17 09:42:43 -04003784 kfree(cifs_sb->mountdata);
3785 unload_nls(cifs_sb->local_nls);
3786 kfree(cifs_sb);
Steve French50c2f752007-07-13 00:33:32 +00003787}
Linus Torvalds1da177e2005-04-16 15:20:36 -07003788
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003789int
3790cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003791{
3792 int rc = 0;
Jeff Layton198b5682010-04-24 07:57:48 -04003793 struct TCP_Server_Info *server = ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003794
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003795 if (!server->ops->need_neg || !server->ops->negotiate)
3796 return -ENOSYS;
3797
Jeff Layton198b5682010-04-24 07:57:48 -04003798 /* only send once per connect */
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003799 if (!server->ops->need_neg(server))
Jeff Layton198b5682010-04-24 07:57:48 -04003800 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003801
Pavel Shilovsky45275782012-05-17 17:53:29 +04003802 set_credits(server, 1);
Pavel Shilovsky286170a2012-05-25 10:43:58 +04003803
3804 rc = server->ops->negotiate(xid, ses);
Jeff Layton198b5682010-04-24 07:57:48 -04003805 if (rc == 0) {
3806 spin_lock(&GlobalMid_Lock);
Jeff Layton7fdbaa12011-06-10 16:14:57 -04003807 if (server->tcpStatus == CifsNeedNegotiate)
Jeff Layton198b5682010-04-24 07:57:48 -04003808 server->tcpStatus = CifsGood;
3809 else
3810 rc = -EHOSTDOWN;
3811 spin_unlock(&GlobalMid_Lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003812 }
Steve French26b994f2008-08-06 05:11:33 +00003813
Jeff Layton198b5682010-04-24 07:57:48 -04003814 return rc;
3815}
Steve French26b994f2008-08-06 05:11:33 +00003816
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003817int
3818cifs_setup_session(const unsigned int xid, struct cifs_ses *ses,
3819 struct nls_table *nls_info)
Jeff Layton198b5682010-04-24 07:57:48 -04003820{
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003821 int rc = -ENOSYS;
Jeff Layton198b5682010-04-24 07:57:48 -04003822 struct TCP_Server_Info *server = ses->server;
3823
Jeff Layton198b5682010-04-24 07:57:48 -04003824 ses->capabilities = server->capabilities;
Steve French26b994f2008-08-06 05:11:33 +00003825 if (linuxExtEnabled == 0)
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003826 ses->capabilities &= (~server->vals->cap_unix);
Steve French20418ac2009-04-30 16:13:32 +00003827
Joe Perchesf96637b2013-05-04 22:12:25 -05003828 cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
Steve French96daf2b2011-05-27 04:34:02 +00003829 server->sec_mode, server->capabilities, server->timeAdj);
Jeff Laytoncb7691b2008-08-18 15:41:05 -04003830
Pavel Shilovsky58c45c52012-05-25 10:54:49 +04003831 if (server->ops->sess_setup)
3832 rc = server->ops->sess_setup(xid, ses, nls_info);
3833
Steve French26b994f2008-08-06 05:11:33 +00003834 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -05003835 cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc);
Steve French26b994f2008-08-06 05:11:33 +00003836 } else {
Dan Carpenterb13ce4b2013-04-10 14:43:00 +03003837 mutex_lock(&server->srv_mutex);
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003838 if (!server->session_estab) {
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003839 server->session_key.response = ses->auth_key.response;
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003840 server->session_key.len = ses->auth_key.len;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003841 server->sequence_number = 0x2;
3842 server->session_estab = true;
3843 ses->auth_key.response = NULL;
Steve Frenche65a5cb2013-06-27 01:06:50 -05003844 if (server->ops->generate_signingkey)
3845 server->ops->generate_signingkey(server);
Shirish Pargaonkar5d0d2882010-10-13 18:15:00 -05003846 }
3847 mutex_unlock(&server->srv_mutex);
3848
Joe Perchesf96637b2013-05-04 22:12:25 -05003849 cifs_dbg(FYI, "CIFS Session Established successfully\n");
Steve French20418ac2009-04-30 16:13:32 +00003850 spin_lock(&GlobalMid_Lock);
Jeff Layton198b5682010-04-24 07:57:48 -04003851 ses->status = CifsGood;
3852 ses->need_reconnect = false;
Steve French20418ac2009-04-30 16:13:32 +00003853 spin_unlock(&GlobalMid_Lock);
Steve French26b994f2008-08-06 05:11:33 +00003854 }
3855
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003856 kfree(ses->auth_key.response);
3857 ses->auth_key.response = NULL;
3858 ses->auth_key.len = 0;
Shirish Pargaonkard3686d52010-10-28 09:53:07 -05003859 kfree(ses->ntlmssp);
3860 ses->ntlmssp = NULL;
Shirish Pargaonkar21e73392010-10-21 06:42:55 -05003861
Linus Torvalds1da177e2005-04-16 15:20:36 -07003862 return rc;
3863}
3864
Jeff Layton8a8798a2012-01-17 16:09:15 -05003865static int
3866cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses)
3867{
Jeff Layton3f618222013-06-12 19:52:14 -05003868 vol->sectype = ses->sectype;
3869
3870 /* krb5 is special, since we don't need username or pw */
3871 if (vol->sectype == Kerberos)
Jeff Layton8a8798a2012-01-17 16:09:15 -05003872 return 0;
Jeff Layton8a8798a2012-01-17 16:09:15 -05003873
3874 return cifs_set_cifscreds(vol, ses);
3875}
3876
Steve French96daf2b2011-05-27 04:34:02 +00003877static struct cifs_tcon *
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003878cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
Jeff Layton9d002df2010-10-06 19:51:11 -04003879{
Jeff Layton8a8798a2012-01-17 16:09:15 -05003880 int rc;
Steve French96daf2b2011-05-27 04:34:02 +00003881 struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb);
3882 struct cifs_ses *ses;
3883 struct cifs_tcon *tcon = NULL;
Jeff Layton9d002df2010-10-06 19:51:11 -04003884 struct smb_vol *vol_info;
Jeff Layton9d002df2010-10-06 19:51:11 -04003885
3886 vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL);
Dan Carpenter803ab972012-01-24 11:39:22 +03003887 if (vol_info == NULL)
3888 return ERR_PTR(-ENOMEM);
Jeff Layton9d002df2010-10-06 19:51:11 -04003889
Jeff Layton9d002df2010-10-06 19:51:11 -04003890 vol_info->local_nls = cifs_sb->local_nls;
3891 vol_info->linux_uid = fsuid;
3892 vol_info->cred_uid = fsuid;
3893 vol_info->UNC = master_tcon->treeName;
3894 vol_info->retry = master_tcon->retry;
3895 vol_info->nocase = master_tcon->nocase;
3896 vol_info->local_lease = master_tcon->local_lease;
3897 vol_info->no_linux_ext = !master_tcon->unix_ext;
Jeff Layton28e11bd2013-05-26 07:01:00 -04003898 vol_info->sectype = master_tcon->ses->sectype;
3899 vol_info->sign = master_tcon->ses->sign;
Jeff Layton9d002df2010-10-06 19:51:11 -04003900
Jeff Layton8a8798a2012-01-17 16:09:15 -05003901 rc = cifs_set_vol_auth(vol_info, master_tcon->ses);
3902 if (rc) {
3903 tcon = ERR_PTR(rc);
3904 goto out;
3905 }
Jeff Layton9d002df2010-10-06 19:51:11 -04003906
3907 /* get a reference for the same TCP session */
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303908 spin_lock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003909 ++master_tcon->ses->server->srv_count;
Suresh Jayaraman3f9bcca2010-10-18 23:29:37 +05303910 spin_unlock(&cifs_tcp_ses_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04003911
3912 ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info);
3913 if (IS_ERR(ses)) {
Steve French96daf2b2011-05-27 04:34:02 +00003914 tcon = (struct cifs_tcon *)ses;
Jeff Layton9d002df2010-10-06 19:51:11 -04003915 cifs_put_tcp_session(master_tcon->ses->server);
3916 goto out;
3917 }
3918
3919 tcon = cifs_get_tcon(ses, vol_info);
3920 if (IS_ERR(tcon)) {
3921 cifs_put_smb_ses(ses);
3922 goto out;
3923 }
3924
Pavel Shilovsky29e20f92012-07-13 13:58:14 +04003925 if (cap_unix(ses))
Jeff Layton9d002df2010-10-06 19:51:11 -04003926 reset_cifs_unix_caps(0, tcon, NULL, vol_info);
3927out:
Jeff Layton8a8798a2012-01-17 16:09:15 -05003928 kfree(vol_info->username);
3929 kfree(vol_info->password);
Jeff Layton9d002df2010-10-06 19:51:11 -04003930 kfree(vol_info);
3931
3932 return tcon;
3933}
3934
Steve French96daf2b2011-05-27 04:34:02 +00003935struct cifs_tcon *
Jeff Layton9d002df2010-10-06 19:51:11 -04003936cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb)
3937{
3938 return tlink_tcon(cifs_sb_master_tlink(cifs_sb));
3939}
3940
3941static int
3942cifs_sb_tcon_pending_wait(void *unused)
3943{
3944 schedule();
3945 return signal_pending(current) ? -ERESTARTSYS : 0;
3946}
3947
Jeff Laytonb647c352010-10-28 11:16:44 -04003948/* find and return a tlink with given uid */
3949static struct tcon_link *
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003950tlink_rb_search(struct rb_root *root, kuid_t uid)
Jeff Laytonb647c352010-10-28 11:16:44 -04003951{
3952 struct rb_node *node = root->rb_node;
3953 struct tcon_link *tlink;
3954
3955 while (node) {
3956 tlink = rb_entry(node, struct tcon_link, tl_rbnode);
3957
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003958 if (uid_gt(tlink->tl_uid, uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003959 node = node->rb_left;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003960 else if (uid_lt(tlink->tl_uid, uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003961 node = node->rb_right;
3962 else
3963 return tlink;
3964 }
3965 return NULL;
3966}
3967
3968/* insert a tcon_link into the tree */
3969static void
3970tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink)
3971{
3972 struct rb_node **new = &(root->rb_node), *parent = NULL;
3973 struct tcon_link *tlink;
3974
3975 while (*new) {
3976 tlink = rb_entry(*new, struct tcon_link, tl_rbnode);
3977 parent = *new;
3978
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08003979 if (uid_gt(tlink->tl_uid, new_tlink->tl_uid))
Jeff Laytonb647c352010-10-28 11:16:44 -04003980 new = &((*new)->rb_left);
3981 else
3982 new = &((*new)->rb_right);
3983 }
3984
3985 rb_link_node(&new_tlink->tl_rbnode, parent, new);
3986 rb_insert_color(&new_tlink->tl_rbnode, root);
3987}
3988
Jeff Layton9d002df2010-10-06 19:51:11 -04003989/*
3990 * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the
3991 * current task.
3992 *
3993 * If the superblock doesn't refer to a multiuser mount, then just return
3994 * the master tcon for the mount.
3995 *
Suresh Jayaraman6ef933a2010-11-03 10:53:49 +05303996 * First, search the rbtree for an existing tcon for this fsuid. If one
Jeff Layton9d002df2010-10-06 19:51:11 -04003997 * exists, then check to see if it's pending construction. If it is then wait
3998 * for construction to complete. Once it's no longer pending, check to see if
3999 * it failed and either return an error or retry construction, depending on
4000 * the timeout.
4001 *
4002 * If one doesn't exist then insert a new tcon_link struct into the tree and
4003 * try to construct a new one.
4004 */
4005struct tcon_link *
4006cifs_sb_tlink(struct cifs_sb_info *cifs_sb)
4007{
4008 int ret;
Eric W. Biederman6d4a0832013-02-06 01:48:56 -08004009 kuid_t fsuid = current_fsuid();
Jeff Layton9d002df2010-10-06 19:51:11 -04004010 struct tcon_link *tlink, *newtlink;
4011
4012 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER))
4013 return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb));
4014
4015 spin_lock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04004016 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04004017 if (tlink)
4018 cifs_get_tlink(tlink);
4019 spin_unlock(&cifs_sb->tlink_tree_lock);
4020
4021 if (tlink == NULL) {
4022 newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL);
4023 if (newtlink == NULL)
4024 return ERR_PTR(-ENOMEM);
Jeff Laytonb647c352010-10-28 11:16:44 -04004025 newtlink->tl_uid = fsuid;
Jeff Layton9d002df2010-10-06 19:51:11 -04004026 newtlink->tl_tcon = ERR_PTR(-EACCES);
4027 set_bit(TCON_LINK_PENDING, &newtlink->tl_flags);
4028 set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags);
4029 cifs_get_tlink(newtlink);
4030
Jeff Layton9d002df2010-10-06 19:51:11 -04004031 spin_lock(&cifs_sb->tlink_tree_lock);
4032 /* was one inserted after previous search? */
Jeff Laytonb647c352010-10-28 11:16:44 -04004033 tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid);
Jeff Layton9d002df2010-10-06 19:51:11 -04004034 if (tlink) {
4035 cifs_get_tlink(tlink);
4036 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04004037 kfree(newtlink);
4038 goto wait_for_construction;
4039 }
Jeff Layton9d002df2010-10-06 19:51:11 -04004040 tlink = newtlink;
Jeff Laytonb647c352010-10-28 11:16:44 -04004041 tlink_rb_insert(&cifs_sb->tlink_tree, tlink);
4042 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton9d002df2010-10-06 19:51:11 -04004043 } else {
4044wait_for_construction:
4045 ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING,
4046 cifs_sb_tcon_pending_wait,
4047 TASK_INTERRUPTIBLE);
4048 if (ret) {
4049 cifs_put_tlink(tlink);
4050 return ERR_PTR(ret);
4051 }
4052
4053 /* if it's good, return it */
4054 if (!IS_ERR(tlink->tl_tcon))
4055 return tlink;
4056
4057 /* return error if we tried this already recently */
4058 if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) {
4059 cifs_put_tlink(tlink);
4060 return ERR_PTR(-EACCES);
4061 }
4062
4063 if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags))
4064 goto wait_for_construction;
4065 }
4066
4067 tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid);
4068 clear_bit(TCON_LINK_PENDING, &tlink->tl_flags);
4069 wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING);
4070
4071 if (IS_ERR(tlink->tl_tcon)) {
4072 cifs_put_tlink(tlink);
4073 return ERR_PTR(-EACCES);
4074 }
4075
4076 return tlink;
4077}
Jeff Layton2de970f2010-10-06 19:51:12 -04004078
4079/*
4080 * periodic workqueue job that scans tcon_tree for a superblock and closes
4081 * out tcons.
4082 */
4083static void
4084cifs_prune_tlinks(struct work_struct *work)
4085{
4086 struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info,
4087 prune_tlinks.work);
Jeff Laytonb647c352010-10-28 11:16:44 -04004088 struct rb_root *root = &cifs_sb->tlink_tree;
4089 struct rb_node *node = rb_first(root);
4090 struct rb_node *tmp;
4091 struct tcon_link *tlink;
Jeff Layton2de970f2010-10-06 19:51:12 -04004092
Jeff Laytonb647c352010-10-28 11:16:44 -04004093 /*
4094 * Because we drop the spinlock in the loop in order to put the tlink
4095 * it's not guarded against removal of links from the tree. The only
4096 * places that remove entries from the tree are this function and
4097 * umounts. Because this function is non-reentrant and is canceled
4098 * before umount can proceed, this is safe.
4099 */
4100 spin_lock(&cifs_sb->tlink_tree_lock);
4101 node = rb_first(root);
4102 while (node != NULL) {
4103 tmp = node;
4104 node = rb_next(tmp);
4105 tlink = rb_entry(tmp, struct tcon_link, tl_rbnode);
4106
4107 if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) ||
4108 atomic_read(&tlink->tl_count) != 0 ||
4109 time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies))
4110 continue;
4111
4112 cifs_get_tlink(tlink);
4113 clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags);
4114 rb_erase(tmp, root);
4115
Jeff Layton2de970f2010-10-06 19:51:12 -04004116 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Laytonb647c352010-10-28 11:16:44 -04004117 cifs_put_tlink(tlink);
4118 spin_lock(&cifs_sb->tlink_tree_lock);
4119 }
4120 spin_unlock(&cifs_sb->tlink_tree_lock);
Jeff Layton2de970f2010-10-06 19:51:12 -04004121
Jeff Laytonda472fc2012-03-23 14:40:53 -04004122 queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks,
Jeff Layton2de970f2010-10-06 19:51:12 -04004123 TLINK_IDLE_EXPIRE);
4124}