Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/connect.c |
| 3 | * |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2011 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU Lesser General Public License as published |
| 9 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 15 | * the GNU Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public License |
| 18 | * along with this library; if not, write to the Free Software |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | */ |
| 21 | #include <linux/fs.h> |
| 22 | #include <linux/net.h> |
| 23 | #include <linux/string.h> |
| 24 | #include <linux/list.h> |
| 25 | #include <linux/wait.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/pagemap.h> |
| 28 | #include <linux/ctype.h> |
| 29 | #include <linux/utsname.h> |
| 30 | #include <linux/mempool.h> |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 31 | #include <linux/delay.h> |
Steve French | f191401 | 2005-08-18 09:37:34 -0700 | [diff] [blame] | 32 | #include <linux/completion.h> |
Igor Mammedov | aaf737a | 2007-04-03 19:16:43 +0000 | [diff] [blame] | 33 | #include <linux/kthread.h> |
Steve French | 0ae0efa | 2005-10-10 10:57:19 -0700 | [diff] [blame] | 34 | #include <linux/pagevec.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame] | 35 | #include <linux/freezer.h> |
Igor Mammedov | 5c2503a | 2009-04-21 19:31:05 +0400 | [diff] [blame] | 36 | #include <linux/namei.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <asm/uaccess.h> |
| 38 | #include <asm/processor.h> |
Jeff Layton | 50b64e3 | 2009-06-02 06:55:20 -0400 | [diff] [blame] | 39 | #include <linux/inet.h> |
Paul Gortmaker | 143cb49 | 2011-07-01 14:23:34 -0400 | [diff] [blame] | 40 | #include <linux/module.h> |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 41 | #include <keys/user-type.h> |
Steve French | 0e2beda | 2009-01-30 21:24:41 +0000 | [diff] [blame] | 42 | #include <net/ipv6.h> |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 43 | #include <linux/parser.h> |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include "cifspdu.h" |
| 46 | #include "cifsglob.h" |
| 47 | #include "cifsproto.h" |
| 48 | #include "cifs_unicode.h" |
| 49 | #include "cifs_debug.h" |
| 50 | #include "cifs_fs_sb.h" |
| 51 | #include "ntlmssp.h" |
| 52 | #include "nterr.h" |
| 53 | #include "rfc1002pdu.h" |
Suresh Jayaraman | 488f1d2d | 2010-07-05 18:12:15 +0530 | [diff] [blame] | 54 | #include "fscache.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | #define CIFS_PORT 445 |
| 57 | #define RFC1001_PORT 139 |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | extern mempool_t *cifs_req_poolp; |
| 60 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 61 | /* FIXME: should these be tunable? */ |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 62 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 63 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 64 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 65 | enum { |
| 66 | |
| 67 | /* Mount options that take no arguments */ |
| 68 | Opt_user_xattr, Opt_nouser_xattr, |
| 69 | Opt_forceuid, Opt_noforceuid, |
Jeff Layton | 72bd481 | 2012-10-03 16:02:36 -0400 | [diff] [blame] | 70 | Opt_forcegid, Opt_noforcegid, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 71 | Opt_noblocksend, Opt_noautotune, |
| 72 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 73 | Opt_mapposix, Opt_nomapposix, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 74 | Opt_mapchars, Opt_nomapchars, Opt_sfu, |
| 75 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, |
| 76 | Opt_noposixpaths, Opt_nounix, |
| 77 | Opt_nocase, |
| 78 | Opt_brl, Opt_nobrl, |
| 79 | Opt_forcemandatorylock, Opt_setuids, |
| 80 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, |
| 81 | Opt_nohard, Opt_nosoft, |
| 82 | Opt_nointr, Opt_intr, |
| 83 | Opt_nostrictsync, Opt_strictsync, |
| 84 | Opt_serverino, Opt_noserverino, |
| 85 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, |
| 86 | Opt_acl, Opt_noacl, Opt_locallease, |
Jeff Layton | 1b35920 | 2012-09-19 15:20:27 -0700 | [diff] [blame] | 87 | Opt_sign, Opt_seal, Opt_noac, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 88 | Opt_fsc, Opt_mfsymlinks, |
Jeff Layton | a0b3df5 | 2013-05-24 07:40:59 -0400 | [diff] [blame] | 89 | Opt_multiuser, Opt_sloppy, Opt_nosharesock, |
Steve French | b2a3077 | 2015-09-29 21:49:28 -0500 | [diff] [blame] | 90 | Opt_persistent, Opt_nopersistent, |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 91 | Opt_resilient, Opt_noresilient, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 92 | |
| 93 | /* Mount options which take numeric value */ |
| 94 | Opt_backupuid, Opt_backupgid, Opt_uid, |
| 95 | Opt_cruid, Opt_gid, Opt_file_mode, |
| 96 | Opt_dirmode, Opt_port, |
| 97 | Opt_rsize, Opt_wsize, Opt_actimeo, |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 98 | Opt_echo_interval, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 99 | |
| 100 | /* Mount options which take string value */ |
| 101 | Opt_user, Opt_pass, Opt_ip, |
Jeff Layton | 73a999f | 2013-03-22 08:42:57 -0400 | [diff] [blame] | 102 | Opt_domain, Opt_srcaddr, Opt_iocharset, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 103 | Opt_netbiosname, Opt_servern, |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 104 | Opt_ver, Opt_vers, Opt_sec, Opt_cache, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 105 | |
| 106 | /* Mount options to be ignored */ |
| 107 | Opt_ignore, |
| 108 | |
| 109 | /* Options which could be blank */ |
| 110 | Opt_blank_pass, |
Sachin Prabhu | 4fe9e96 | 2012-04-10 18:12:27 +0100 | [diff] [blame] | 111 | Opt_blank_user, |
| 112 | Opt_blank_ip, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 113 | |
| 114 | Opt_err |
| 115 | }; |
| 116 | |
| 117 | static const match_table_t cifs_mount_option_tokens = { |
| 118 | |
| 119 | { Opt_user_xattr, "user_xattr" }, |
| 120 | { Opt_nouser_xattr, "nouser_xattr" }, |
| 121 | { Opt_forceuid, "forceuid" }, |
| 122 | { Opt_noforceuid, "noforceuid" }, |
Jeff Layton | 72bd481 | 2012-10-03 16:02:36 -0400 | [diff] [blame] | 123 | { Opt_forcegid, "forcegid" }, |
| 124 | { Opt_noforcegid, "noforcegid" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 125 | { Opt_noblocksend, "noblocksend" }, |
| 126 | { Opt_noautotune, "noautotune" }, |
| 127 | { Opt_hard, "hard" }, |
| 128 | { Opt_soft, "soft" }, |
| 129 | { Opt_perm, "perm" }, |
| 130 | { Opt_noperm, "noperm" }, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 131 | { Opt_mapchars, "mapchars" }, /* SFU style */ |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 132 | { Opt_nomapchars, "nomapchars" }, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 133 | { Opt_mapposix, "mapposix" }, /* SFM style */ |
| 134 | { Opt_nomapposix, "nomapposix" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 135 | { Opt_sfu, "sfu" }, |
| 136 | { Opt_nosfu, "nosfu" }, |
| 137 | { Opt_nodfs, "nodfs" }, |
| 138 | { Opt_posixpaths, "posixpaths" }, |
| 139 | { Opt_noposixpaths, "noposixpaths" }, |
| 140 | { Opt_nounix, "nounix" }, |
| 141 | { Opt_nounix, "nolinux" }, |
| 142 | { Opt_nocase, "nocase" }, |
| 143 | { Opt_nocase, "ignorecase" }, |
| 144 | { Opt_brl, "brl" }, |
| 145 | { Opt_nobrl, "nobrl" }, |
| 146 | { Opt_nobrl, "nolock" }, |
| 147 | { Opt_forcemandatorylock, "forcemandatorylock" }, |
Pavel Shilovsky | 5cfdddc | 2012-03-27 20:51:15 +0400 | [diff] [blame] | 148 | { Opt_forcemandatorylock, "forcemand" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 149 | { Opt_setuids, "setuids" }, |
| 150 | { Opt_nosetuids, "nosetuids" }, |
| 151 | { Opt_dynperm, "dynperm" }, |
| 152 | { Opt_nodynperm, "nodynperm" }, |
| 153 | { Opt_nohard, "nohard" }, |
| 154 | { Opt_nosoft, "nosoft" }, |
| 155 | { Opt_nointr, "nointr" }, |
| 156 | { Opt_intr, "intr" }, |
| 157 | { Opt_nostrictsync, "nostrictsync" }, |
| 158 | { Opt_strictsync, "strictsync" }, |
| 159 | { Opt_serverino, "serverino" }, |
| 160 | { Opt_noserverino, "noserverino" }, |
| 161 | { Opt_rwpidforward, "rwpidforward" }, |
| 162 | { Opt_cifsacl, "cifsacl" }, |
| 163 | { Opt_nocifsacl, "nocifsacl" }, |
| 164 | { Opt_acl, "acl" }, |
| 165 | { Opt_noacl, "noacl" }, |
| 166 | { Opt_locallease, "locallease" }, |
| 167 | { Opt_sign, "sign" }, |
| 168 | { Opt_seal, "seal" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 169 | { Opt_noac, "noac" }, |
| 170 | { Opt_fsc, "fsc" }, |
| 171 | { Opt_mfsymlinks, "mfsymlinks" }, |
| 172 | { Opt_multiuser, "multiuser" }, |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 173 | { Opt_sloppy, "sloppy" }, |
Jeff Layton | a0b3df5 | 2013-05-24 07:40:59 -0400 | [diff] [blame] | 174 | { Opt_nosharesock, "nosharesock" }, |
Steve French | b2a3077 | 2015-09-29 21:49:28 -0500 | [diff] [blame] | 175 | { Opt_persistent, "persistenthandles"}, |
| 176 | { Opt_nopersistent, "nopersistenthandles"}, |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 177 | { Opt_resilient, "resilienthandles"}, |
| 178 | { Opt_noresilient, "noresilienthandles"}, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 179 | |
| 180 | { Opt_backupuid, "backupuid=%s" }, |
| 181 | { Opt_backupgid, "backupgid=%s" }, |
| 182 | { Opt_uid, "uid=%s" }, |
| 183 | { Opt_cruid, "cruid=%s" }, |
| 184 | { Opt_gid, "gid=%s" }, |
| 185 | { Opt_file_mode, "file_mode=%s" }, |
| 186 | { Opt_dirmode, "dirmode=%s" }, |
| 187 | { Opt_dirmode, "dir_mode=%s" }, |
| 188 | { Opt_port, "port=%s" }, |
| 189 | { Opt_rsize, "rsize=%s" }, |
| 190 | { Opt_wsize, "wsize=%s" }, |
| 191 | { Opt_actimeo, "actimeo=%s" }, |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 192 | { Opt_echo_interval, "echo_interval=%s" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 193 | |
Sachin Prabhu | 4fe9e96 | 2012-04-10 18:12:27 +0100 | [diff] [blame] | 194 | { Opt_blank_user, "user=" }, |
| 195 | { Opt_blank_user, "username=" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 196 | { Opt_user, "user=%s" }, |
| 197 | { Opt_user, "username=%s" }, |
| 198 | { Opt_blank_pass, "pass=" }, |
Jesper Nilsson | 3c15b4c | 2012-11-29 17:31:16 +0100 | [diff] [blame] | 199 | { Opt_blank_pass, "password=" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 200 | { Opt_pass, "pass=%s" }, |
| 201 | { Opt_pass, "password=%s" }, |
Sachin Prabhu | 4fe9e96 | 2012-04-10 18:12:27 +0100 | [diff] [blame] | 202 | { Opt_blank_ip, "ip=" }, |
| 203 | { Opt_blank_ip, "addr=" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 204 | { Opt_ip, "ip=%s" }, |
| 205 | { Opt_ip, "addr=%s" }, |
Jeff Layton | 73a999f | 2013-03-22 08:42:57 -0400 | [diff] [blame] | 206 | { Opt_ignore, "unc=%s" }, |
| 207 | { Opt_ignore, "target=%s" }, |
| 208 | { Opt_ignore, "path=%s" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 209 | { Opt_domain, "dom=%s" }, |
| 210 | { Opt_domain, "domain=%s" }, |
| 211 | { Opt_domain, "workgroup=%s" }, |
| 212 | { Opt_srcaddr, "srcaddr=%s" }, |
Jeff Layton | 73a999f | 2013-03-22 08:42:57 -0400 | [diff] [blame] | 213 | { Opt_ignore, "prefixpath=%s" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 214 | { Opt_iocharset, "iocharset=%s" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 215 | { Opt_netbiosname, "netbiosname=%s" }, |
| 216 | { Opt_servern, "servern=%s" }, |
| 217 | { Opt_ver, "ver=%s" }, |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 218 | { Opt_vers, "vers=%s" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 219 | { Opt_sec, "sec=%s" }, |
Jeff Layton | 15b6a47 | 2012-05-16 07:50:15 -0400 | [diff] [blame] | 220 | { Opt_cache, "cache=%s" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 221 | |
| 222 | { Opt_ignore, "cred" }, |
| 223 | { Opt_ignore, "credentials" }, |
Jeff Layton | a557b97 | 2012-05-02 14:02:40 -0400 | [diff] [blame] | 224 | { Opt_ignore, "cred=%s" }, |
| 225 | { Opt_ignore, "credentials=%s" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 226 | { Opt_ignore, "guest" }, |
| 227 | { Opt_ignore, "rw" }, |
| 228 | { Opt_ignore, "ro" }, |
| 229 | { Opt_ignore, "suid" }, |
| 230 | { Opt_ignore, "nosuid" }, |
| 231 | { Opt_ignore, "exec" }, |
| 232 | { Opt_ignore, "noexec" }, |
| 233 | { Opt_ignore, "nodev" }, |
| 234 | { Opt_ignore, "noauto" }, |
| 235 | { Opt_ignore, "dev" }, |
| 236 | { Opt_ignore, "mand" }, |
| 237 | { Opt_ignore, "nomand" }, |
| 238 | { Opt_ignore, "_netdev" }, |
| 239 | |
| 240 | { Opt_err, NULL } |
| 241 | }; |
| 242 | |
| 243 | enum { |
| 244 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, |
| 245 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, |
Jeff Layton | 7659624 | 2012-07-23 20:34:17 -0400 | [diff] [blame] | 246 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2, |
| 247 | Opt_sec_ntlmv2i, Opt_sec_lanman, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 248 | Opt_sec_none, |
| 249 | |
| 250 | Opt_sec_err |
| 251 | }; |
| 252 | |
| 253 | static const match_table_t cifs_secflavor_tokens = { |
| 254 | { Opt_sec_krb5, "krb5" }, |
| 255 | { Opt_sec_krb5i, "krb5i" }, |
| 256 | { Opt_sec_krb5p, "krb5p" }, |
| 257 | { Opt_sec_ntlmsspi, "ntlmsspi" }, |
| 258 | { Opt_sec_ntlmssp, "ntlmssp" }, |
| 259 | { Opt_ntlm, "ntlm" }, |
| 260 | { Opt_sec_ntlmi, "ntlmi" }, |
Jeff Layton | 7659624 | 2012-07-23 20:34:17 -0400 | [diff] [blame] | 261 | { Opt_sec_ntlmv2, "nontlm" }, |
| 262 | { Opt_sec_ntlmv2, "ntlmv2" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 263 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 264 | { Opt_sec_lanman, "lanman" }, |
| 265 | { Opt_sec_none, "none" }, |
| 266 | |
| 267 | { Opt_sec_err, NULL } |
| 268 | }; |
| 269 | |
Jeff Layton | 15b6a47 | 2012-05-16 07:50:15 -0400 | [diff] [blame] | 270 | /* cache flavors */ |
| 271 | enum { |
| 272 | Opt_cache_loose, |
| 273 | Opt_cache_strict, |
| 274 | Opt_cache_none, |
| 275 | Opt_cache_err |
| 276 | }; |
| 277 | |
| 278 | static const match_table_t cifs_cacheflavor_tokens = { |
| 279 | { Opt_cache_loose, "loose" }, |
| 280 | { Opt_cache_strict, "strict" }, |
| 281 | { Opt_cache_none, "none" }, |
| 282 | { Opt_cache_err, NULL } |
| 283 | }; |
| 284 | |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 285 | static const match_table_t cifs_smb_version_tokens = { |
| 286 | { Smb_1, SMB1_VERSION_STRING }, |
Steve French | dd446b1 | 2012-11-28 23:21:06 -0600 | [diff] [blame] | 287 | { Smb_20, SMB20_VERSION_STRING}, |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 288 | { Smb_21, SMB21_VERSION_STRING }, |
Steve French | e4aa25e | 2012-10-01 12:26:22 -0500 | [diff] [blame] | 289 | { Smb_30, SMB30_VERSION_STRING }, |
Steve French | 20b6d8b | 2013-06-12 22:48:41 -0500 | [diff] [blame] | 290 | { Smb_302, SMB302_VERSION_STRING }, |
Steve French | 5f7fbf7 | 2014-12-17 22:52:58 -0600 | [diff] [blame] | 291 | #ifdef CONFIG_CIFS_SMB311 |
| 292 | { Smb_311, SMB311_VERSION_STRING }, |
Steve French | aab1893 | 2015-06-23 23:37:11 -0500 | [diff] [blame] | 293 | { Smb_311, ALT_SMB311_VERSION_STRING }, |
Steve French | 5f7fbf7 | 2014-12-17 22:52:58 -0600 | [diff] [blame] | 294 | #endif /* SMB311 */ |
| 295 | { Smb_version_err, NULL } |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 296 | }; |
| 297 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 298 | static int ip_connect(struct TCP_Server_Info *server); |
| 299 | static int generic_ip_connect(struct TCP_Server_Info *server); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 300 | static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink); |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 301 | static void cifs_prune_tlinks(struct work_struct *work); |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 302 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
| 303 | const char *devname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
Jeff Layton | d5c5605 | 2008-12-01 18:42:33 -0500 | [diff] [blame] | 305 | /* |
| 306 | * cifs tcp session reconnection |
| 307 | * |
| 308 | * mark tcp session as reconnecting so temporarily locked |
| 309 | * mark all smb sessions as reconnecting for tcp session |
| 310 | * reconnect tcp session |
| 311 | * wake up waiters on reconnection? - (not needed currently) |
| 312 | */ |
Pavel Shilovsky | 28ea529 | 2012-05-23 16:18:00 +0400 | [diff] [blame] | 313 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | cifs_reconnect(struct TCP_Server_Info *server) |
| 315 | { |
| 316 | int rc = 0; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 317 | struct list_head *tmp, *tmp2; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 318 | struct cifs_ses *ses; |
| 319 | struct cifs_tcon *tcon; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 320 | struct mid_q_entry *mid_entry; |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 321 | struct list_head retry_list; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 469ee61 | 2008-10-16 18:46:39 +0000 | [diff] [blame] | 324 | if (server->tcpStatus == CifsExiting) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 325 | /* the demux thread will exit normally |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | next time through the loop */ |
| 327 | spin_unlock(&GlobalMid_Lock); |
| 328 | return rc; |
| 329 | } else |
| 330 | server->tcpStatus = CifsNeedReconnect; |
| 331 | spin_unlock(&GlobalMid_Lock); |
| 332 | server->maxBuf = 0; |
Pavel Shilovsky | aa24d1e | 2011-12-27 16:23:34 +0400 | [diff] [blame] | 333 | #ifdef CONFIG_CIFS_SMB2 |
| 334 | server->max_read = 0; |
| 335 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 337 | cifs_dbg(FYI, "Reconnecting tcp session\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | /* before reconnecting the tcp session, mark the smb session (uid) |
| 340 | and the tid bad so they are not used until reconnected */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 341 | cifs_dbg(FYI, "%s: marking sessions and tcons for reconnect\n", |
| 342 | __func__); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 343 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 344 | list_for_each(tmp, &server->smb_ses_list) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 345 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 346 | ses->need_reconnect = true; |
| 347 | ses->ipc_tid = 0; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 348 | list_for_each(tmp2, &ses->tcon_list) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 349 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 350 | tcon->need_reconnect = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 353 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 354 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | /* do not want to be sending data on a socket we are freeing */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 356 | cifs_dbg(FYI, "%s: tearing down socket\n", __func__); |
Jeff Layton | 72ca545 | 2008-12-01 07:09:36 -0500 | [diff] [blame] | 357 | mutex_lock(&server->srv_mutex); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 358 | if (server->ssocket) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 359 | cifs_dbg(FYI, "State: 0x%x Flags: 0x%lx\n", |
| 360 | server->ssocket->state, server->ssocket->flags); |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 361 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 362 | cifs_dbg(FYI, "Post shutdown state: 0x%x Flags: 0x%lx\n", |
| 363 | server->ssocket->state, server->ssocket->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | sock_release(server->ssocket); |
| 365 | server->ssocket = NULL; |
| 366 | } |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 367 | server->sequence_number = 0; |
| 368 | server->session_estab = false; |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 369 | kfree(server->session_key.response); |
| 370 | server->session_key.response = NULL; |
| 371 | server->session_key.len = 0; |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 372 | server->lstrp = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 374 | /* mark submitted MIDs for retry and issue callback */ |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 375 | INIT_LIST_HEAD(&retry_list); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 376 | cifs_dbg(FYI, "%s: moving mids to private list\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 378 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
| 379 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 380 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
| 381 | mid_entry->mid_state = MID_RETRY_NEEDED; |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 382 | list_move(&mid_entry->qhead, &retry_list); |
| 383 | } |
| 384 | spin_unlock(&GlobalMid_Lock); |
Rabin Vincent | 820962d | 2015-12-23 07:32:41 +0100 | [diff] [blame] | 385 | mutex_unlock(&server->srv_mutex); |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 386 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 387 | cifs_dbg(FYI, "%s: issuing mid callbacks\n", __func__); |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 388 | list_for_each_safe(tmp, tmp2, &retry_list) { |
| 389 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 390 | list_del_init(&mid_entry->qhead); |
| 391 | mid_entry->callback(mid_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Jeff Layton | 7fdbaa1 | 2011-06-10 16:14:57 -0400 | [diff] [blame] | 394 | do { |
Steve French | 6c3d890 | 2006-07-31 22:46:20 +0000 | [diff] [blame] | 395 | try_to_freeze(); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 396 | |
| 397 | /* we should try only the port we connected to before */ |
Jeff Layton | 73e216a | 2013-09-05 08:38:10 -0400 | [diff] [blame] | 398 | mutex_lock(&server->srv_mutex); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 399 | rc = generic_ip_connect(server); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 400 | if (rc) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 401 | cifs_dbg(FYI, "reconnect error %d\n", rc); |
Federico Sauter | 4afe260 | 2015-03-17 17:45:28 +0100 | [diff] [blame] | 402 | mutex_unlock(&server->srv_mutex); |
Steve French | 0cb766a | 2005-04-28 22:41:11 -0700 | [diff] [blame] | 403 | msleep(3000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } else { |
| 405 | atomic_inc(&tcpSesReconnectCount); |
| 406 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 469ee61 | 2008-10-16 18:46:39 +0000 | [diff] [blame] | 407 | if (server->tcpStatus != CifsExiting) |
Steve French | fd88ce9 | 2011-04-12 01:01:14 +0000 | [diff] [blame] | 408 | server->tcpStatus = CifsNeedNegotiate; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 409 | spin_unlock(&GlobalMid_Lock); |
Federico Sauter | 4afe260 | 2015-03-17 17:45:28 +0100 | [diff] [blame] | 410 | mutex_unlock(&server->srv_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
Jeff Layton | 7fdbaa1 | 2011-06-10 16:14:57 -0400 | [diff] [blame] | 412 | } while (server->tcpStatus == CifsNeedReconnect); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | return rc; |
| 415 | } |
| 416 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 417 | static void |
| 418 | cifs_echo_request(struct work_struct *work) |
| 419 | { |
| 420 | int rc; |
| 421 | struct TCP_Server_Info *server = container_of(work, |
| 422 | struct TCP_Server_Info, echo.work); |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 423 | unsigned long echo_interval = server->echo_interval; |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 424 | |
Jeff Layton | 247ec9b | 2011-02-04 17:09:50 -0500 | [diff] [blame] | 425 | /* |
Pavel Shilovsky | f6d7617 | 2012-05-25 14:47:16 +0400 | [diff] [blame] | 426 | * We cannot send an echo if it is disabled or until the |
| 427 | * NEGOTIATE_PROTOCOL request is done, which is indicated by |
| 428 | * server->ops->need_neg() == true. Also, no need to ping if |
| 429 | * we got a response recently. |
Jeff Layton | 247ec9b | 2011-02-04 17:09:50 -0500 | [diff] [blame] | 430 | */ |
Steve French | 4fcd181 | 2016-06-22 20:12:05 -0500 | [diff] [blame] | 431 | |
| 432 | if (server->tcpStatus == CifsNeedReconnect || |
| 433 | server->tcpStatus == CifsExiting || server->tcpStatus == CifsNew || |
Pavel Shilovsky | f6d7617 | 2012-05-25 14:47:16 +0400 | [diff] [blame] | 434 | (server->ops->can_echo && !server->ops->can_echo(server)) || |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 435 | time_before(jiffies, server->lstrp + echo_interval - HZ)) |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 436 | goto requeue_echo; |
| 437 | |
Pavel Shilovsky | f6d7617 | 2012-05-25 14:47:16 +0400 | [diff] [blame] | 438 | rc = server->ops->echo ? server->ops->echo(server) : -ENOSYS; |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 439 | if (rc) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 440 | cifs_dbg(FYI, "Unable to send echo request to server: %s\n", |
| 441 | server->hostname); |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 442 | |
| 443 | requeue_echo: |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 444 | queue_delayed_work(cifsiod_wq, &server->echo, echo_interval); |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 445 | } |
| 446 | |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 447 | static bool |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 448 | allocate_buffers(struct TCP_Server_Info *server) |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 449 | { |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 450 | if (!server->bigbuf) { |
| 451 | server->bigbuf = (char *)cifs_buf_get(); |
| 452 | if (!server->bigbuf) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 453 | cifs_dbg(VFS, "No memory for large SMB response\n"); |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 454 | msleep(3000); |
| 455 | /* retry will check if exiting */ |
| 456 | return false; |
| 457 | } |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 458 | } else if (server->large_buf) { |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 459 | /* we are reusing a dirty large buf, clear its start */ |
Pavel Shilovsky | 1887f60 | 2012-05-17 12:45:31 +0400 | [diff] [blame] | 460 | memset(server->bigbuf, 0, HEADER_SIZE(server)); |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 461 | } |
| 462 | |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 463 | if (!server->smallbuf) { |
| 464 | server->smallbuf = (char *)cifs_small_buf_get(); |
| 465 | if (!server->smallbuf) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 466 | cifs_dbg(VFS, "No memory for SMB response\n"); |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 467 | msleep(1000); |
| 468 | /* retry will check if exiting */ |
| 469 | return false; |
| 470 | } |
| 471 | /* beginning of smb buffer is cleared in our buf_get */ |
| 472 | } else { |
| 473 | /* if existing small buf clear beginning */ |
Pavel Shilovsky | 1887f60 | 2012-05-17 12:45:31 +0400 | [diff] [blame] | 474 | memset(server->smallbuf, 0, HEADER_SIZE(server)); |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 475 | } |
| 476 | |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 477 | return true; |
| 478 | } |
| 479 | |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 480 | static bool |
| 481 | server_unresponsive(struct TCP_Server_Info *server) |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 482 | { |
Pavel Shilovsky | 6dae51a | 2012-02-21 16:50:23 +0300 | [diff] [blame] | 483 | /* |
| 484 | * We need to wait 2 echo intervals to make sure we handle such |
| 485 | * situations right: |
| 486 | * 1s client sends a normal SMB request |
| 487 | * 2s client gets a response |
| 488 | * 30s echo workqueue job pops, and decides we got a response recently |
| 489 | * and don't need to send another |
| 490 | * ... |
| 491 | * 65s kernel_recvmsg times out, and we see that we haven't gotten |
| 492 | * a response in >60s. |
| 493 | */ |
| 494 | if (server->tcpStatus == CifsGood && |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 495 | time_after(jiffies, server->lstrp + 2 * server->echo_interval)) { |
| 496 | cifs_dbg(VFS, "Server %s has not responded in %lu seconds. Reconnecting...\n", |
| 497 | server->hostname, (2 * server->echo_interval) / HZ); |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 498 | cifs_reconnect(server); |
| 499 | wake_up(&server->response_q); |
| 500 | return true; |
| 501 | } |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 502 | |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 503 | return false; |
| 504 | } |
| 505 | |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 506 | static int |
| 507 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct msghdr *smb_msg) |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 508 | { |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 509 | int length = 0; |
| 510 | int total_read; |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 511 | |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 512 | smb_msg->msg_control = NULL; |
| 513 | smb_msg->msg_controllen = 0; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 514 | |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 515 | for (total_read = 0; msg_data_left(smb_msg); total_read += length) { |
Jeff Layton | 95edcff | 2011-12-01 20:22:41 -0500 | [diff] [blame] | 516 | try_to_freeze(); |
| 517 | |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 518 | if (server_unresponsive(server)) |
| 519 | return -ECONNABORTED; |
| 520 | |
| 521 | length = sock_recvmsg(server->ssocket, smb_msg, 0); |
| 522 | |
| 523 | if (server->tcpStatus == CifsExiting) |
| 524 | return -ESHUTDOWN; |
| 525 | |
| 526 | if (server->tcpStatus == CifsNeedReconnect) { |
| 527 | cifs_reconnect(server); |
| 528 | return -ECONNABORTED; |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 529 | } |
| 530 | |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 531 | if (length == -ERESTARTSYS || |
| 532 | length == -EAGAIN || |
| 533 | length == -EINTR) { |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 534 | /* |
| 535 | * Minimum sleep to prevent looping, allowing socket |
| 536 | * to clear and app threads to set tcpStatus |
| 537 | * CifsNeedReconnect if server hung. |
| 538 | */ |
| 539 | usleep_range(1000, 2000); |
| 540 | length = 0; |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 541 | continue; |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | if (length <= 0) { |
Al Viro | 09aab88 | 2015-11-13 03:00:17 -0500 | [diff] [blame] | 545 | cifs_dbg(FYI, "Received no data or error: %d\n", length); |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 546 | cifs_reconnect(server); |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 547 | return -ECONNABORTED; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 548 | } |
| 549 | } |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 550 | return total_read; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 551 | } |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 552 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 553 | int |
| 554 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, |
| 555 | unsigned int to_read) |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 556 | { |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 557 | struct msghdr smb_msg; |
| 558 | struct kvec iov = {.iov_base = buf, .iov_len = to_read}; |
| 559 | iov_iter_kvec(&smb_msg.msg_iter, READ | ITER_KVEC, &iov, 1, to_read); |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 560 | |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 561 | return cifs_readv_from_socket(server, &smb_msg); |
| 562 | } |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 563 | |
Al Viro | 7133566 | 2016-01-09 19:54:50 -0500 | [diff] [blame] | 564 | int |
| 565 | cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page, |
| 566 | unsigned int to_read) |
| 567 | { |
| 568 | struct msghdr smb_msg; |
| 569 | struct bio_vec bv = {.bv_page = page, .bv_len = to_read}; |
| 570 | iov_iter_bvec(&smb_msg.msg_iter, READ | ITER_BVEC, &bv, 1, to_read); |
| 571 | return cifs_readv_from_socket(server, &smb_msg); |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 572 | } |
| 573 | |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 574 | static bool |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 575 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 576 | { |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 577 | /* |
| 578 | * The first byte big endian of the length field, |
| 579 | * is actually not part of the length but the type |
| 580 | * with the most common, zero, as regular data. |
| 581 | */ |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 582 | switch (type) { |
| 583 | case RFC1002_SESSION_MESSAGE: |
| 584 | /* Regular SMB response */ |
| 585 | return true; |
| 586 | case RFC1002_SESSION_KEEP_ALIVE: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 587 | cifs_dbg(FYI, "RFC 1002 session keep alive\n"); |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 588 | break; |
| 589 | case RFC1002_POSITIVE_SESSION_RESPONSE: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 590 | cifs_dbg(FYI, "RFC 1002 positive session response\n"); |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 591 | break; |
| 592 | case RFC1002_NEGATIVE_SESSION_RESPONSE: |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 593 | /* |
| 594 | * We get this from Windows 98 instead of an error on |
| 595 | * SMB negprot response. |
| 596 | */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 597 | cifs_dbg(FYI, "RFC 1002 negative session response\n"); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 598 | /* give server a second to clean up */ |
| 599 | msleep(1000); |
| 600 | /* |
| 601 | * Always try 445 first on reconnect since we get NACK |
| 602 | * on some if we ever connected to port 139 (the NACK |
| 603 | * is since we do not begin with RFC1001 session |
| 604 | * initialize frame). |
| 605 | */ |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 606 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 607 | cifs_reconnect(server); |
| 608 | wake_up(&server->response_q); |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 609 | break; |
| 610 | default: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 611 | cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", type); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 612 | cifs_reconnect(server); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 613 | } |
| 614 | |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 615 | return false; |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 616 | } |
| 617 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 618 | void |
| 619 | dequeue_mid(struct mid_q_entry *mid, bool malformed) |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 620 | { |
| 621 | #ifdef CONFIG_CIFS_STATS2 |
| 622 | mid->when_received = jiffies; |
| 623 | #endif |
| 624 | spin_lock(&GlobalMid_Lock); |
| 625 | if (!malformed) |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 626 | mid->mid_state = MID_RESPONSE_RECEIVED; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 627 | else |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 628 | mid->mid_state = MID_RESPONSE_MALFORMED; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 629 | list_del_init(&mid->qhead); |
| 630 | spin_unlock(&GlobalMid_Lock); |
| 631 | } |
| 632 | |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 633 | static void |
| 634 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 635 | char *buf, int malformed) |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 636 | { |
Pavel Shilovsky | 316cf94 | 2012-05-23 14:31:03 +0400 | [diff] [blame] | 637 | if (server->ops->check_trans2 && |
| 638 | server->ops->check_trans2(mid, server, buf, malformed)) |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 639 | return; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 640 | mid->resp_buf = buf; |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 641 | mid->large_buf = server->large_buf; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 642 | /* Was previous buf put in mpx struct for multi-rsp? */ |
| 643 | if (!mid->multiRsp) { |
| 644 | /* smb buffer will be freed by user thread */ |
| 645 | if (server->large_buf) |
| 646 | server->bigbuf = NULL; |
| 647 | else |
| 648 | server->smallbuf = NULL; |
| 649 | } |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 650 | dequeue_mid(mid, malformed); |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 651 | } |
| 652 | |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 653 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
| 654 | { |
| 655 | int length; |
| 656 | |
| 657 | /* take it off the list, if it's not already */ |
| 658 | spin_lock(&cifs_tcp_ses_lock); |
| 659 | list_del_init(&server->tcp_ses_list); |
| 660 | spin_unlock(&cifs_tcp_ses_lock); |
| 661 | |
| 662 | spin_lock(&GlobalMid_Lock); |
| 663 | server->tcpStatus = CifsExiting; |
| 664 | spin_unlock(&GlobalMid_Lock); |
| 665 | wake_up_all(&server->response_q); |
| 666 | |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 667 | /* check if we have blocked requests that need to free */ |
Pavel Shilovsky | fc40f9c | 2012-02-17 17:09:12 +0300 | [diff] [blame] | 668 | spin_lock(&server->req_lock); |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 669 | if (server->credits <= 0) |
| 670 | server->credits = 1; |
Pavel Shilovsky | fc40f9c | 2012-02-17 17:09:12 +0300 | [diff] [blame] | 671 | spin_unlock(&server->req_lock); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 672 | /* |
| 673 | * Although there should not be any requests blocked on this queue it |
| 674 | * can not hurt to be paranoid and try to wake up requests that may |
| 675 | * haven been blocked when more than 50 at time were on the wire to the |
| 676 | * same server - they now will see the session is in exit state and get |
| 677 | * out of SendReceive. |
| 678 | */ |
| 679 | wake_up_all(&server->request_q); |
| 680 | /* give those requests time to exit */ |
| 681 | msleep(125); |
| 682 | |
| 683 | if (server->ssocket) { |
| 684 | sock_release(server->ssocket); |
| 685 | server->ssocket = NULL; |
| 686 | } |
| 687 | |
| 688 | if (!list_empty(&server->pending_mid_q)) { |
| 689 | struct list_head dispose_list; |
| 690 | struct mid_q_entry *mid_entry; |
| 691 | struct list_head *tmp, *tmp2; |
| 692 | |
| 693 | INIT_LIST_HEAD(&dispose_list); |
| 694 | spin_lock(&GlobalMid_Lock); |
| 695 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
| 696 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 697 | cifs_dbg(FYI, "Clearing mid 0x%llx\n", mid_entry->mid); |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 698 | mid_entry->mid_state = MID_SHUTDOWN; |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 699 | list_move(&mid_entry->qhead, &dispose_list); |
| 700 | } |
| 701 | spin_unlock(&GlobalMid_Lock); |
| 702 | |
| 703 | /* now walk dispose list and issue callbacks */ |
| 704 | list_for_each_safe(tmp, tmp2, &dispose_list) { |
| 705 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 706 | cifs_dbg(FYI, "Callback mid 0x%llx\n", mid_entry->mid); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 707 | list_del_init(&mid_entry->qhead); |
| 708 | mid_entry->callback(mid_entry); |
| 709 | } |
| 710 | /* 1/8th of sec is more than enough time for them to exit */ |
| 711 | msleep(125); |
| 712 | } |
| 713 | |
| 714 | if (!list_empty(&server->pending_mid_q)) { |
| 715 | /* |
| 716 | * mpx threads have not exited yet give them at least the smb |
| 717 | * send timeout time for long ops. |
| 718 | * |
| 719 | * Due to delays on oplock break requests, we need to wait at |
| 720 | * least 45 seconds before giving up on a request getting a |
| 721 | * response and going ahead and killing cifsd. |
| 722 | */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 723 | cifs_dbg(FYI, "Wait for exit from demultiplex thread\n"); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 724 | msleep(46000); |
| 725 | /* |
| 726 | * If threads still have not exited they are probably never |
| 727 | * coming home not much else we can do but free the memory. |
| 728 | */ |
| 729 | } |
| 730 | |
| 731 | kfree(server->hostname); |
| 732 | kfree(server); |
| 733 | |
| 734 | length = atomic_dec_return(&tcpSesAllocCount); |
| 735 | if (length > 0) |
David Rientjes | 11d8336 | 2015-04-14 15:48:21 -0700 | [diff] [blame] | 736 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 737 | } |
| 738 | |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 739 | static int |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 740 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) |
| 741 | { |
| 742 | int length; |
| 743 | char *buf = server->smallbuf; |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 744 | unsigned int pdu_length = get_rfc1002_length(buf); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 745 | |
| 746 | /* make sure this will fit in a large buffer */ |
Pavel Shilovsky | 1887f60 | 2012-05-17 12:45:31 +0400 | [diff] [blame] | 747 | if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server) - 4) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 748 | cifs_dbg(VFS, "SMB response too long (%u bytes)\n", pdu_length); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 749 | cifs_reconnect(server); |
| 750 | wake_up(&server->response_q); |
Pavel Shilovsky | 3fabaa2 | 2014-07-10 09:55:52 +0400 | [diff] [blame] | 751 | return -ECONNABORTED; |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 752 | } |
| 753 | |
| 754 | /* switch to large buffer if too big for a small one */ |
| 755 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
| 756 | server->large_buf = true; |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 757 | memcpy(server->bigbuf, buf, server->total_read); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 758 | buf = server->bigbuf; |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | /* now read the rest */ |
Pavel Shilovsky | 1887f60 | 2012-05-17 12:45:31 +0400 | [diff] [blame] | 762 | length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, |
| 763 | pdu_length - HEADER_SIZE(server) + 1 + 4); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 764 | if (length < 0) |
| 765 | return length; |
| 766 | server->total_read += length; |
| 767 | |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 768 | dump_smb(buf, server->total_read); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 769 | |
| 770 | /* |
| 771 | * We know that we received enough to get to the MID as we |
| 772 | * checked the pdu_length earlier. Now check to see |
| 773 | * if the rest of the header is OK. We borrow the length |
| 774 | * var for the rest of the loop to avoid a new stack var. |
| 775 | * |
| 776 | * 48 bytes is enough to display the header and a little bit |
| 777 | * into the payload for debugging purposes. |
| 778 | */ |
Steve French | 373512e | 2015-12-18 13:05:30 -0600 | [diff] [blame] | 779 | length = server->ops->check_message(buf, server->total_read, server); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 780 | if (length != 0) |
| 781 | cifs_dump_mem("Bad SMB: ", buf, |
| 782 | min_t(unsigned int, server->total_read, 48)); |
| 783 | |
Pavel Shilovsky | 2e44b28 | 2012-09-18 16:20:33 -0700 | [diff] [blame] | 784 | if (server->ops->is_status_pending && |
| 785 | server->ops->is_status_pending(buf, server, length)) |
| 786 | return -1; |
| 787 | |
Jeff Layton | ff4fa4a | 2012-02-07 06:31:05 -0500 | [diff] [blame] | 788 | if (!mid) |
| 789 | return length; |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 790 | |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 791 | handle_mid(mid, server, buf, length); |
Jeff Layton | ff4fa4a | 2012-02-07 06:31:05 -0500 | [diff] [blame] | 792 | return 0; |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 793 | } |
| 794 | |
| 795 | static int |
Al Viro | 7c97c20 | 2011-06-21 08:51:28 -0400 | [diff] [blame] | 796 | cifs_demultiplex_thread(void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | { |
| 798 | int length; |
Al Viro | 7c97c20 | 2011-06-21 08:51:28 -0400 | [diff] [blame] | 799 | struct TCP_Server_Info *server = p; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 800 | unsigned int pdu_length; |
| 801 | char *buf = NULL; |
Steve French | a5c3e1c | 2014-09-16 04:16:19 -0500 | [diff] [blame] | 802 | struct task_struct *task_to_wake = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | struct mid_q_entry *mid_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | current->flags |= PF_MEMALLOC; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 806 | cifs_dbg(FYI, "Demultiplex PID: %d\n", task_pid_nr(current)); |
Jeff Layton | 93d0ec8 | 2008-08-02 08:00:48 -0400 | [diff] [blame] | 807 | |
| 808 | length = atomic_inc_return(&tcpSesAllocCount); |
| 809 | if (length > 1) |
David Rientjes | 11d8336 | 2015-04-14 15:48:21 -0700 | [diff] [blame] | 810 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
Rafael J. Wysocki | 8314418 | 2007-07-17 04:03:35 -0700 | [diff] [blame] | 812 | set_freezable(); |
Jeff Layton | 469ee61 | 2008-10-16 18:46:39 +0000 | [diff] [blame] | 813 | while (server->tcpStatus != CifsExiting) { |
Steve French | ede1327 | 2005-08-30 20:10:14 -0700 | [diff] [blame] | 814 | if (try_to_freeze()) |
| 815 | continue; |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 816 | |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 817 | if (!allocate_buffers(server)) |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 818 | continue; |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 819 | |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 820 | server->large_buf = false; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 821 | buf = server->smallbuf; |
Steve French | f01d5e1 | 2007-08-30 21:13:31 +0000 | [diff] [blame] | 822 | pdu_length = 4; /* enough to get RFC1001 header */ |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 823 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 824 | length = cifs_read_from_socket(server, buf, pdu_length); |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 825 | if (length < 0) |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 826 | continue; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 827 | server->total_read = length; |
Steve French | 67010fb | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 828 | |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 829 | /* |
| 830 | * The right amount was read from socket - 4 bytes, |
| 831 | * so we can now interpret the length field. |
| 832 | */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 833 | pdu_length = get_rfc1002_length(buf); |
Steve French | 46810cb | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 834 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 835 | cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length); |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 836 | if (!is_smb_response(server, buf[0])) |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 837 | continue; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 838 | |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 839 | /* make sure we have enough to get to the MID */ |
Pavel Shilovsky | 1887f60 | 2012-05-17 12:45:31 +0400 | [diff] [blame] | 840 | if (pdu_length < HEADER_SIZE(server) - 1 - 4) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 841 | cifs_dbg(VFS, "SMB response too short (%u bytes)\n", |
| 842 | pdu_length); |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 843 | cifs_reconnect(server); |
| 844 | wake_up(&server->response_q); |
| 845 | continue; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 846 | } |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 847 | |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 848 | /* read down to the MID */ |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 849 | length = cifs_read_from_socket(server, buf + 4, |
Pavel Shilovsky | 1887f60 | 2012-05-17 12:45:31 +0400 | [diff] [blame] | 850 | HEADER_SIZE(server) - 1 - 4); |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 851 | if (length < 0) |
| 852 | continue; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 853 | server->total_read += length; |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 854 | |
Pavel Shilovsky | 8aa26f3 | 2012-05-17 13:25:35 +0400 | [diff] [blame] | 855 | mid_entry = server->ops->find_mid(server, buf); |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 856 | |
Jeff Layton | 44d22d8 | 2011-10-19 15:29:49 -0400 | [diff] [blame] | 857 | if (!mid_entry || !mid_entry->receive) |
| 858 | length = standard_receive3(server, mid_entry); |
| 859 | else |
| 860 | length = mid_entry->receive(server, mid_entry); |
| 861 | |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 862 | if (length < 0) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 863 | continue; |
| 864 | |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 865 | if (server->large_buf) |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 866 | buf = server->bigbuf; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 867 | |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 868 | server->lstrp = jiffies; |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 869 | if (mid_entry != NULL) { |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 870 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
| 871 | mid_entry->callback(mid_entry); |
Pavel Shilovsky | 7f0adb5 | 2012-05-28 15:50:10 +0400 | [diff] [blame] | 872 | } else if (!server->ops->is_oplock_break || |
| 873 | !server->ops->is_oplock_break(buf, server)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 874 | cifs_dbg(VFS, "No task to wake, unknown frame received! NumMids %d\n", |
| 875 | atomic_read(&midCount)); |
Pavel Shilovsky | 1887f60 | 2012-05-17 12:45:31 +0400 | [diff] [blame] | 876 | cifs_dump_mem("Received Data is: ", buf, |
| 877 | HEADER_SIZE(server)); |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 878 | #ifdef CONFIG_CIFS_DEBUG2 |
Pavel Shilovsky | 7f0adb5 | 2012-05-28 15:50:10 +0400 | [diff] [blame] | 879 | if (server->ops->dump_detail) |
| 880 | server->ops->dump_detail(buf); |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 881 | cifs_dump_mids(server); |
| 882 | #endif /* CIFS_DEBUG2 */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 883 | |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 884 | } |
| 885 | } /* end while !EXITING */ |
| 886 | |
Justin P. Mattock | fd62cb7 | 2011-02-24 22:15:02 -0800 | [diff] [blame] | 887 | /* buffer usually freed in free_mid - need to free it here on exit */ |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 888 | cifs_buf_release(server->bigbuf); |
| 889 | if (server->smallbuf) /* no sense logging a debug message if NULL */ |
| 890 | cifs_small_buf_release(server->smallbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | |
Steve French | a5c3e1c | 2014-09-16 04:16:19 -0500 | [diff] [blame] | 892 | task_to_wake = xchg(&server->tsk, NULL); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 893 | clean_demultiplex_info(server); |
Steve French | a5c3e1c | 2014-09-16 04:16:19 -0500 | [diff] [blame] | 894 | |
| 895 | /* if server->tsk was NULL then wait for a signal before exiting */ |
| 896 | if (!task_to_wake) { |
| 897 | set_current_state(TASK_INTERRUPTIBLE); |
| 898 | while (!signal_pending(current)) { |
| 899 | schedule(); |
| 900 | set_current_state(TASK_INTERRUPTIBLE); |
| 901 | } |
| 902 | set_current_state(TASK_RUNNING); |
| 903 | } |
| 904 | |
Jeff Layton | 0468a2c | 2008-12-01 07:09:35 -0500 | [diff] [blame] | 905 | module_put_and_exit(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | } |
| 907 | |
Jeff Layton | c359cf3 | 2007-11-16 22:22:06 +0000 | [diff] [blame] | 908 | /* extract the host portion of the UNC string */ |
| 909 | static char * |
| 910 | extract_hostname(const char *unc) |
| 911 | { |
| 912 | const char *src; |
| 913 | char *dst, *delim; |
| 914 | unsigned int len; |
| 915 | |
| 916 | /* skip double chars at beginning of string */ |
| 917 | /* BB: check validity of these bytes? */ |
| 918 | src = unc + 2; |
| 919 | |
| 920 | /* delimiter between hostname and sharename is always '\\' now */ |
| 921 | delim = strchr(src, '\\'); |
| 922 | if (!delim) |
| 923 | return ERR_PTR(-EINVAL); |
| 924 | |
| 925 | len = delim - src; |
| 926 | dst = kmalloc((len + 1), GFP_KERNEL); |
| 927 | if (dst == NULL) |
| 928 | return ERR_PTR(-ENOMEM); |
| 929 | |
| 930 | memcpy(dst, src, len); |
| 931 | dst[len] = '\0'; |
| 932 | |
| 933 | return dst; |
| 934 | } |
| 935 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 936 | static int get_option_ul(substring_t args[], unsigned long *option) |
| 937 | { |
| 938 | int rc; |
| 939 | char *string; |
| 940 | |
| 941 | string = match_strdup(args); |
| 942 | if (string == NULL) |
| 943 | return -ENOMEM; |
Sachin Prabhu | bfa890a | 2012-04-13 14:04:32 +0100 | [diff] [blame] | 944 | rc = kstrtoul(string, 0, option); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 945 | kfree(string); |
| 946 | |
| 947 | return rc; |
| 948 | } |
| 949 | |
Eric W. Biederman | 3da4656 | 2013-02-06 01:37:39 -0800 | [diff] [blame] | 950 | static int get_option_uid(substring_t args[], kuid_t *result) |
| 951 | { |
| 952 | unsigned long value; |
| 953 | kuid_t uid; |
| 954 | int rc; |
| 955 | |
| 956 | rc = get_option_ul(args, &value); |
| 957 | if (rc) |
| 958 | return rc; |
| 959 | |
| 960 | uid = make_kuid(current_user_ns(), value); |
| 961 | if (!uid_valid(uid)) |
| 962 | return -EINVAL; |
| 963 | |
| 964 | *result = uid; |
| 965 | return 0; |
| 966 | } |
| 967 | |
| 968 | static int get_option_gid(substring_t args[], kgid_t *result) |
| 969 | { |
| 970 | unsigned long value; |
| 971 | kgid_t gid; |
| 972 | int rc; |
| 973 | |
| 974 | rc = get_option_ul(args, &value); |
| 975 | if (rc) |
| 976 | return rc; |
| 977 | |
| 978 | gid = make_kgid(current_user_ns(), value); |
| 979 | if (!gid_valid(gid)) |
| 980 | return -EINVAL; |
| 981 | |
| 982 | *result = gid; |
| 983 | return 0; |
| 984 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 985 | |
| 986 | static int cifs_parse_security_flavors(char *value, |
| 987 | struct smb_vol *vol) |
| 988 | { |
| 989 | |
| 990 | substring_t args[MAX_OPT_ARGS]; |
| 991 | |
Jeff Layton | 1e3cc57 | 2013-06-10 17:12:23 -0500 | [diff] [blame] | 992 | /* |
| 993 | * With mount options, the last one should win. Reset any existing |
| 994 | * settings back to default. |
| 995 | */ |
| 996 | vol->sectype = Unspecified; |
| 997 | vol->sign = false; |
| 998 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 999 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 1000 | case Opt_sec_krb5p: |
| 1001 | cifs_dbg(VFS, "sec=krb5p is not supported!\n"); |
| 1002 | return 1; |
| 1003 | case Opt_sec_krb5i: |
| 1004 | vol->sign = true; |
| 1005 | /* Fallthrough */ |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1006 | case Opt_sec_krb5: |
Jeff Layton | 1e3cc57 | 2013-06-10 17:12:23 -0500 | [diff] [blame] | 1007 | vol->sectype = Kerberos; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1008 | break; |
| 1009 | case Opt_sec_ntlmsspi: |
Jeff Layton | 1e3cc57 | 2013-06-10 17:12:23 -0500 | [diff] [blame] | 1010 | vol->sign = true; |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 1011 | /* Fallthrough */ |
| 1012 | case Opt_sec_ntlmssp: |
| 1013 | vol->sectype = RawNTLMSSP; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1014 | break; |
| 1015 | case Opt_sec_ntlmi: |
Jeff Layton | 1e3cc57 | 2013-06-10 17:12:23 -0500 | [diff] [blame] | 1016 | vol->sign = true; |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 1017 | /* Fallthrough */ |
| 1018 | case Opt_ntlm: |
| 1019 | vol->sectype = NTLM; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1020 | break; |
| 1021 | case Opt_sec_ntlmv2i: |
Jeff Layton | 1e3cc57 | 2013-06-10 17:12:23 -0500 | [diff] [blame] | 1022 | vol->sign = true; |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 1023 | /* Fallthrough */ |
| 1024 | case Opt_sec_ntlmv2: |
| 1025 | vol->sectype = NTLMv2; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1026 | break; |
| 1027 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
| 1028 | case Opt_sec_lanman: |
Jeff Layton | 1e3cc57 | 2013-06-10 17:12:23 -0500 | [diff] [blame] | 1029 | vol->sectype = LANMAN; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1030 | break; |
| 1031 | #endif |
| 1032 | case Opt_sec_none: |
| 1033 | vol->nullauth = 1; |
| 1034 | break; |
| 1035 | default: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1036 | cifs_dbg(VFS, "bad security option: %s\n", value); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1037 | return 1; |
| 1038 | } |
| 1039 | |
| 1040 | return 0; |
| 1041 | } |
| 1042 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | static int |
Jeff Layton | 15b6a47 | 2012-05-16 07:50:15 -0400 | [diff] [blame] | 1044 | cifs_parse_cache_flavor(char *value, struct smb_vol *vol) |
| 1045 | { |
| 1046 | substring_t args[MAX_OPT_ARGS]; |
| 1047 | |
| 1048 | switch (match_token(value, cifs_cacheflavor_tokens, args)) { |
| 1049 | case Opt_cache_loose: |
| 1050 | vol->direct_io = false; |
| 1051 | vol->strict_io = false; |
| 1052 | break; |
| 1053 | case Opt_cache_strict: |
| 1054 | vol->direct_io = false; |
| 1055 | vol->strict_io = true; |
| 1056 | break; |
| 1057 | case Opt_cache_none: |
| 1058 | vol->direct_io = true; |
| 1059 | vol->strict_io = false; |
| 1060 | break; |
| 1061 | default: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1062 | cifs_dbg(VFS, "bad cache= option: %s\n", value); |
Jeff Layton | 15b6a47 | 2012-05-16 07:50:15 -0400 | [diff] [blame] | 1063 | return 1; |
| 1064 | } |
| 1065 | return 0; |
| 1066 | } |
| 1067 | |
| 1068 | static int |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 1069 | cifs_parse_smb_version(char *value, struct smb_vol *vol) |
| 1070 | { |
| 1071 | substring_t args[MAX_OPT_ARGS]; |
| 1072 | |
| 1073 | switch (match_token(value, cifs_smb_version_tokens, args)) { |
| 1074 | case Smb_1: |
| 1075 | vol->ops = &smb1_operations; |
| 1076 | vol->vals = &smb1_values; |
| 1077 | break; |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 1078 | #ifdef CONFIG_CIFS_SMB2 |
Steve French | dd446b1 | 2012-11-28 23:21:06 -0600 | [diff] [blame] | 1079 | case Smb_20: |
Pavel Shilovsky | 53ef101 | 2013-09-05 16:11:28 +0400 | [diff] [blame] | 1080 | vol->ops = &smb20_operations; |
Steve French | dd446b1 | 2012-11-28 23:21:06 -0600 | [diff] [blame] | 1081 | vol->vals = &smb20_values; |
| 1082 | break; |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 1083 | case Smb_21: |
| 1084 | vol->ops = &smb21_operations; |
| 1085 | vol->vals = &smb21_values; |
| 1086 | break; |
Steve French | e4aa25e | 2012-10-01 12:26:22 -0500 | [diff] [blame] | 1087 | case Smb_30: |
Steve French | 38107d4 | 2012-12-08 22:08:06 -0600 | [diff] [blame] | 1088 | vol->ops = &smb30_operations; |
Steve French | e4aa25e | 2012-10-01 12:26:22 -0500 | [diff] [blame] | 1089 | vol->vals = &smb30_values; |
| 1090 | break; |
Steve French | 20b6d8b | 2013-06-12 22:48:41 -0500 | [diff] [blame] | 1091 | case Smb_302: |
| 1092 | vol->ops = &smb30_operations; /* currently identical with 3.0 */ |
| 1093 | vol->vals = &smb302_values; |
| 1094 | break; |
Steve French | 5f7fbf7 | 2014-12-17 22:52:58 -0600 | [diff] [blame] | 1095 | #ifdef CONFIG_CIFS_SMB311 |
| 1096 | case Smb_311: |
Steve French | aab1893 | 2015-06-23 23:37:11 -0500 | [diff] [blame] | 1097 | vol->ops = &smb311_operations; |
Steve French | 5f7fbf7 | 2014-12-17 22:52:58 -0600 | [diff] [blame] | 1098 | vol->vals = &smb311_values; |
| 1099 | break; |
| 1100 | #endif /* SMB311 */ |
Steve French | 1080ef7 | 2011-02-24 18:07:19 +0000 | [diff] [blame] | 1101 | #endif |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 1102 | default: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1103 | cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value); |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 1104 | return 1; |
| 1105 | } |
| 1106 | return 0; |
| 1107 | } |
| 1108 | |
Jeff Layton | d387a5c | 2012-12-10 06:10:46 -0500 | [diff] [blame] | 1109 | /* |
| 1110 | * Parse a devname into substrings and populate the vol->UNC and vol->prepath |
| 1111 | * fields with the result. Returns 0 on success and an error otherwise. |
| 1112 | */ |
| 1113 | static int |
| 1114 | cifs_parse_devname(const char *devname, struct smb_vol *vol) |
| 1115 | { |
| 1116 | char *pos; |
| 1117 | const char *delims = "/\\"; |
| 1118 | size_t len; |
| 1119 | |
| 1120 | /* make sure we have a valid UNC double delimiter prefix */ |
| 1121 | len = strspn(devname, delims); |
| 1122 | if (len != 2) |
| 1123 | return -EINVAL; |
| 1124 | |
| 1125 | /* find delimiter between host and sharename */ |
| 1126 | pos = strpbrk(devname + 2, delims); |
| 1127 | if (!pos) |
| 1128 | return -EINVAL; |
| 1129 | |
| 1130 | /* skip past delimiter */ |
| 1131 | ++pos; |
| 1132 | |
| 1133 | /* now go until next delimiter or end of string */ |
| 1134 | len = strcspn(pos, delims); |
| 1135 | |
| 1136 | /* move "pos" up to delimiter or NULL */ |
| 1137 | pos += len; |
| 1138 | vol->UNC = kstrndup(devname, pos - devname, GFP_KERNEL); |
| 1139 | if (!vol->UNC) |
| 1140 | return -ENOMEM; |
| 1141 | |
| 1142 | convert_delimiter(vol->UNC, '\\'); |
| 1143 | |
Sachin Prabhu | 11e3164 | 2016-02-08 13:44:01 +0530 | [diff] [blame] | 1144 | /* skip any delimiter */ |
| 1145 | if (*pos == '/' || *pos == '\\') |
| 1146 | pos++; |
| 1147 | |
| 1148 | /* If pos is NULL then no prepath */ |
| 1149 | if (!*pos) |
Jeff Layton | d387a5c | 2012-12-10 06:10:46 -0500 | [diff] [blame] | 1150 | return 0; |
| 1151 | |
| 1152 | vol->prepath = kstrdup(pos, GFP_KERNEL); |
| 1153 | if (!vol->prepath) |
| 1154 | return -ENOMEM; |
| 1155 | |
| 1156 | return 0; |
| 1157 | } |
| 1158 | |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 1159 | static int |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1160 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1161 | struct smb_vol *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | { |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1163 | char *data, *end; |
Vasily Averin | 957df45 | 2011-06-06 11:33:12 +0400 | [diff] [blame] | 1164 | char *mountdata_copy = NULL, *options; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | unsigned int temp_len, i, j; |
| 1166 | char separator[2]; |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1167 | short int override_uid = -1; |
| 1168 | short int override_gid = -1; |
| 1169 | bool uid_specified = false; |
| 1170 | bool gid_specified = false; |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1171 | bool sloppy = false; |
| 1172 | char *invalid = NULL; |
Jeff Layton | 8846399 | 2010-11-22 15:31:03 -0500 | [diff] [blame] | 1173 | char *nodename = utsname()->nodename; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1174 | char *string = NULL; |
| 1175 | char *tmp_end, *value; |
| 1176 | char delim; |
Jeff Layton | b979aaa | 2012-11-26 11:09:55 -0500 | [diff] [blame] | 1177 | bool got_ip = false; |
| 1178 | unsigned short port = 0; |
| 1179 | struct sockaddr *dstaddr = (struct sockaddr *)&vol->dstaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | |
| 1181 | separator[0] = ','; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1182 | separator[1] = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1183 | delim = separator[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | |
Jeff Layton | 6ee9542 | 2012-11-26 11:09:57 -0500 | [diff] [blame] | 1185 | /* ensure we always start with zeroed-out smb_vol */ |
| 1186 | memset(vol, 0, sizeof(*vol)); |
| 1187 | |
Jeff Layton | 8846399 | 2010-11-22 15:31:03 -0500 | [diff] [blame] | 1188 | /* |
| 1189 | * does not have to be perfect mapping since field is |
| 1190 | * informational, only used for servers that do not support |
| 1191 | * port 445 and it can be overridden at mount time |
| 1192 | */ |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 1193 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
| 1194 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) |
Jeff Layton | 8846399 | 2010-11-22 15:31:03 -0500 | [diff] [blame] | 1195 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
| 1196 | |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 1197 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1198 | /* null target name indicates to use *SMBSERVR default called name |
| 1199 | if we end up sending RFC1001 session initialize */ |
| 1200 | vol->target_rfc1001_name[0] = 0; |
Jeff Layton | 3e4b3e1 | 2010-07-19 18:00:17 -0400 | [diff] [blame] | 1201 | vol->cred_uid = current_uid(); |
| 1202 | vol->linux_uid = current_uid(); |
David Howells | a001e5b | 2008-11-14 10:38:47 +1100 | [diff] [blame] | 1203 | vol->linux_gid = current_gid(); |
Jeff Layton | f55ed1a | 2009-05-26 16:28:11 -0400 | [diff] [blame] | 1204 | |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 1205 | /* |
| 1206 | * default to SFM style remapping of seven reserved characters |
| 1207 | * unless user overrides it or we negotiate CIFS POSIX where |
| 1208 | * it is unnecessary. Can not simultaneously use more than one mapping |
| 1209 | * since then readdir could list files that open could not open |
| 1210 | */ |
| 1211 | vol->remap = true; |
| 1212 | |
Jeff Layton | f55ed1a | 2009-05-26 16:28:11 -0400 | [diff] [blame] | 1213 | /* default to only allowing write access to owner of the mount */ |
| 1214 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
| 1216 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 1217 | /* default is always to request posix paths. */ |
| 1218 | vol->posix_paths = 1; |
Jeff Layton | a0c9217 | 2009-05-27 15:40:47 -0400 | [diff] [blame] | 1219 | /* default to using server inode numbers where available */ |
| 1220 | vol->server_ino = 1; |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 1221 | |
Jeff Layton | 1b35920 | 2012-09-19 15:20:27 -0700 | [diff] [blame] | 1222 | /* default is to use strict cifs caching semantics */ |
| 1223 | vol->strict_io = true; |
| 1224 | |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 1225 | vol->actimeo = CIFS_DEF_ACTIMEO; |
| 1226 | |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 1227 | /* FIXME: add autonegotiation -- for now, SMB1 is default */ |
| 1228 | vol->ops = &smb1_operations; |
| 1229 | vol->vals = &smb1_values; |
| 1230 | |
Rabin Vincent | b782fcc | 2016-07-19 09:25:45 +0200 | [diff] [blame] | 1231 | vol->echo_interval = SMB_ECHO_INTERVAL_DEFAULT; |
| 1232 | |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1233 | if (!mountdata) |
| 1234 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1236 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); |
| 1237 | if (!mountdata_copy) |
| 1238 | goto cifs_parse_mount_err; |
| 1239 | |
| 1240 | options = mountdata_copy; |
Pavel Shilovsky | 4906e50 | 2011-04-14 22:00:56 +0400 | [diff] [blame] | 1241 | end = options + strlen(options); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1242 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1243 | if (strncmp(options, "sep=", 4) == 0) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1244 | if (options[4] != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | separator[0] = options[4]; |
| 1246 | options += 5; |
| 1247 | } else { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1248 | cifs_dbg(FYI, "Null separator not allowed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | } |
| 1250 | } |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 1251 | vol->backupuid_specified = false; /* no backup intent for a user */ |
| 1252 | vol->backupgid_specified = false; /* no backup intent for a group */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1253 | |
Jeff Layton | 37d4f99 | 2013-05-24 07:40:05 -0400 | [diff] [blame] | 1254 | switch (cifs_parse_devname(devname, vol)) { |
| 1255 | case 0: |
| 1256 | break; |
| 1257 | case -ENOMEM: |
| 1258 | cifs_dbg(VFS, "Unable to allocate memory for devname.\n"); |
| 1259 | goto cifs_parse_mount_err; |
| 1260 | case -EINVAL: |
| 1261 | cifs_dbg(VFS, "Malformed UNC in devname.\n"); |
| 1262 | goto cifs_parse_mount_err; |
| 1263 | default: |
| 1264 | cifs_dbg(VFS, "Unknown error parsing devname.\n"); |
| 1265 | goto cifs_parse_mount_err; |
Jeff Layton | d387a5c | 2012-12-10 06:10:46 -0500 | [diff] [blame] | 1266 | } |
| 1267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | while ((data = strsep(&options, separator)) != NULL) { |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1269 | substring_t args[MAX_OPT_ARGS]; |
| 1270 | unsigned long option; |
| 1271 | int token; |
| 1272 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | if (!*data) |
| 1274 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1276 | token = match_token(data, cifs_mount_option_tokens, args); |
| 1277 | |
| 1278 | switch (token) { |
| 1279 | |
| 1280 | /* Ingnore the following */ |
| 1281 | case Opt_ignore: |
| 1282 | break; |
| 1283 | |
| 1284 | /* Boolean values */ |
| 1285 | case Opt_user_xattr: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | vol->no_xattr = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1287 | break; |
| 1288 | case Opt_nouser_xattr: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | vol->no_xattr = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1290 | break; |
| 1291 | case Opt_forceuid: |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1292 | override_uid = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1293 | break; |
| 1294 | case Opt_noforceuid: |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1295 | override_uid = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1296 | break; |
Jeff Layton | 72bd481 | 2012-10-03 16:02:36 -0400 | [diff] [blame] | 1297 | case Opt_forcegid: |
| 1298 | override_gid = 1; |
| 1299 | break; |
| 1300 | case Opt_noforcegid: |
| 1301 | override_gid = 0; |
| 1302 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1303 | case Opt_noblocksend: |
Steve French | edf1ae4 | 2008-10-29 00:47:57 +0000 | [diff] [blame] | 1304 | vol->noblocksnd = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1305 | break; |
| 1306 | case Opt_noautotune: |
Steve French | edf1ae4 | 2008-10-29 00:47:57 +0000 | [diff] [blame] | 1307 | vol->noautotune = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1308 | break; |
| 1309 | case Opt_hard: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | vol->retry = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1311 | break; |
| 1312 | case Opt_soft: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | vol->retry = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1314 | break; |
| 1315 | case Opt_perm: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | vol->noperm = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1317 | break; |
| 1318 | case Opt_noperm: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | vol->noperm = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1320 | break; |
| 1321 | case Opt_mapchars: |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 1322 | vol->sfu_remap = true; |
| 1323 | vol->remap = false; /* disable SFM mapping */ |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1324 | break; |
| 1325 | case Opt_nomapchars: |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 1326 | vol->sfu_remap = false; |
| 1327 | break; |
| 1328 | case Opt_mapposix: |
| 1329 | vol->remap = true; |
| 1330 | vol->sfu_remap = false; /* disable SFU mapping */ |
| 1331 | break; |
| 1332 | case Opt_nomapposix: |
| 1333 | vol->remap = false; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1334 | break; |
| 1335 | case Opt_sfu: |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1336 | vol->sfu_emul = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1337 | break; |
| 1338 | case Opt_nosfu: |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1339 | vol->sfu_emul = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1340 | break; |
| 1341 | case Opt_nodfs: |
Steve French | 2c1b861 | 2008-10-16 18:35:21 +0000 | [diff] [blame] | 1342 | vol->nodfs = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1343 | break; |
| 1344 | case Opt_posixpaths: |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 1345 | vol->posix_paths = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1346 | break; |
| 1347 | case Opt_noposixpaths: |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 1348 | vol->posix_paths = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1349 | break; |
| 1350 | case Opt_nounix: |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 1351 | vol->no_linux_ext = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1352 | break; |
| 1353 | case Opt_nocase: |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1354 | vol->nocase = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1355 | break; |
| 1356 | case Opt_brl: |
Steve French | c46fa8a | 2005-08-18 20:49:57 -0700 | [diff] [blame] | 1357 | vol->nobrl = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1358 | break; |
| 1359 | case Opt_nobrl: |
Steve French | c46fa8a | 2005-08-18 20:49:57 -0700 | [diff] [blame] | 1360 | vol->nobrl = 1; |
Pavel Shilovsky | 5cfdddc | 2012-03-27 20:51:15 +0400 | [diff] [blame] | 1361 | /* |
| 1362 | * turn off mandatory locking in mode |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1363 | * if remote locking is turned off since the |
Pavel Shilovsky | 5cfdddc | 2012-03-27 20:51:15 +0400 | [diff] [blame] | 1364 | * local vfs will do advisory |
| 1365 | */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1366 | if (vol->file_mode == |
| 1367 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) |
Steve French | d3485d3 | 2005-08-19 11:04:29 -0700 | [diff] [blame] | 1368 | vol->file_mode = S_IALLUGO; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1369 | break; |
| 1370 | case Opt_forcemandatorylock: |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 1371 | vol->mand_lock = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1372 | break; |
| 1373 | case Opt_setuids: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | vol->setuids = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1375 | break; |
| 1376 | case Opt_nosetuids: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | vol->setuids = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1378 | break; |
| 1379 | case Opt_dynperm: |
Jeff Layton | d0a9c07 | 2008-05-12 22:23:49 +0000 | [diff] [blame] | 1380 | vol->dynperm = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1381 | break; |
| 1382 | case Opt_nodynperm: |
Jeff Layton | d0a9c07 | 2008-05-12 22:23:49 +0000 | [diff] [blame] | 1383 | vol->dynperm = false; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1384 | break; |
| 1385 | case Opt_nohard: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | vol->retry = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1387 | break; |
| 1388 | case Opt_nosoft: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | vol->retry = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1390 | break; |
| 1391 | case Opt_nointr: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | vol->intr = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1393 | break; |
| 1394 | case Opt_intr: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | vol->intr = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1396 | break; |
| 1397 | case Opt_nostrictsync: |
Steve French | be65244 | 2009-02-23 15:21:59 +0000 | [diff] [blame] | 1398 | vol->nostrictsync = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1399 | break; |
| 1400 | case Opt_strictsync: |
Steve French | be65244 | 2009-02-23 15:21:59 +0000 | [diff] [blame] | 1401 | vol->nostrictsync = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1402 | break; |
| 1403 | case Opt_serverino: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | vol->server_ino = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1405 | break; |
| 1406 | case Opt_noserverino: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | vol->server_ino = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1408 | break; |
| 1409 | case Opt_rwpidforward: |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 1410 | vol->rwpidforward = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1411 | break; |
| 1412 | case Opt_cifsacl: |
Steve French | 0a4b92c | 2006-01-12 15:44:21 -0800 | [diff] [blame] | 1413 | vol->cifs_acl = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1414 | break; |
| 1415 | case Opt_nocifsacl: |
Steve French | 0a4b92c | 2006-01-12 15:44:21 -0800 | [diff] [blame] | 1416 | vol->cifs_acl = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1417 | break; |
| 1418 | case Opt_acl: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | vol->no_psx_acl = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1420 | break; |
| 1421 | case Opt_noacl: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | vol->no_psx_acl = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1423 | break; |
| 1424 | case Opt_locallease: |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 1425 | vol->local_lease = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1426 | break; |
| 1427 | case Opt_sign: |
Jeff Layton | 1e3cc57 | 2013-06-10 17:12:23 -0500 | [diff] [blame] | 1428 | vol->sign = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1429 | break; |
| 1430 | case Opt_seal: |
Steve French | 95b1cb9 | 2008-05-15 16:44:38 +0000 | [diff] [blame] | 1431 | /* we do not do the following in secFlags because seal |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1432 | * is a per tree connection (mount) not a per socket |
| 1433 | * or per-smb connection option in the protocol |
| 1434 | * vol->secFlg |= CIFSSEC_MUST_SEAL; |
| 1435 | */ |
Steve French | 95b1cb9 | 2008-05-15 16:44:38 +0000 | [diff] [blame] | 1436 | vol->seal = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1437 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1438 | case Opt_noac: |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1439 | pr_warn("CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1440 | break; |
| 1441 | case Opt_fsc: |
Suresh Jayaraman | 607a569 | 2010-11-24 17:49:05 +0530 | [diff] [blame] | 1442 | #ifndef CONFIG_CIFS_FSCACHE |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1443 | cifs_dbg(VFS, "FS-Cache support needs CONFIG_CIFS_FSCACHE kernel config option set\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1444 | goto cifs_parse_mount_err; |
Suresh Jayaraman | 607a569 | 2010-11-24 17:49:05 +0530 | [diff] [blame] | 1445 | #endif |
Suresh Jayaraman | fa1df75 | 2010-07-05 18:13:36 +0530 | [diff] [blame] | 1446 | vol->fsc = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1447 | break; |
| 1448 | case Opt_mfsymlinks: |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 1449 | vol->mfsymlinks = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1450 | break; |
| 1451 | case Opt_multiuser: |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1452 | vol->multiuser = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1453 | break; |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1454 | case Opt_sloppy: |
| 1455 | sloppy = true; |
| 1456 | break; |
Jeff Layton | a0b3df5 | 2013-05-24 07:40:59 -0400 | [diff] [blame] | 1457 | case Opt_nosharesock: |
| 1458 | vol->nosharesock = true; |
| 1459 | break; |
Steve French | b2a3077 | 2015-09-29 21:49:28 -0500 | [diff] [blame] | 1460 | case Opt_nopersistent: |
| 1461 | vol->nopersistent = true; |
| 1462 | if (vol->persistent) { |
| 1463 | cifs_dbg(VFS, |
| 1464 | "persistenthandles mount options conflict\n"); |
| 1465 | goto cifs_parse_mount_err; |
| 1466 | } |
| 1467 | break; |
| 1468 | case Opt_persistent: |
| 1469 | vol->persistent = true; |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 1470 | if ((vol->nopersistent) || (vol->resilient)) { |
Steve French | b2a3077 | 2015-09-29 21:49:28 -0500 | [diff] [blame] | 1471 | cifs_dbg(VFS, |
| 1472 | "persistenthandles mount options conflict\n"); |
| 1473 | goto cifs_parse_mount_err; |
| 1474 | } |
| 1475 | break; |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 1476 | case Opt_resilient: |
| 1477 | vol->resilient = true; |
| 1478 | if (vol->persistent) { |
| 1479 | cifs_dbg(VFS, |
| 1480 | "persistenthandles mount options conflict\n"); |
| 1481 | goto cifs_parse_mount_err; |
| 1482 | } |
| 1483 | break; |
| 1484 | case Opt_noresilient: |
| 1485 | vol->resilient = false; /* already the default */ |
| 1486 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1487 | |
| 1488 | /* Numeric Values */ |
| 1489 | case Opt_backupuid: |
Eric W. Biederman | 3da4656 | 2013-02-06 01:37:39 -0800 | [diff] [blame] | 1490 | if (get_option_uid(args, &vol->backupuid)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1491 | cifs_dbg(VFS, "%s: Invalid backupuid value\n", |
| 1492 | __func__); |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 1493 | goto cifs_parse_mount_err; |
| 1494 | } |
| 1495 | vol->backupuid_specified = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1496 | break; |
| 1497 | case Opt_backupgid: |
Eric W. Biederman | 3da4656 | 2013-02-06 01:37:39 -0800 | [diff] [blame] | 1498 | if (get_option_gid(args, &vol->backupgid)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1499 | cifs_dbg(VFS, "%s: Invalid backupgid value\n", |
| 1500 | __func__); |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 1501 | goto cifs_parse_mount_err; |
| 1502 | } |
| 1503 | vol->backupgid_specified = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1504 | break; |
| 1505 | case Opt_uid: |
Eric W. Biederman | 3da4656 | 2013-02-06 01:37:39 -0800 | [diff] [blame] | 1506 | if (get_option_uid(args, &vol->linux_uid)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1507 | cifs_dbg(VFS, "%s: Invalid uid value\n", |
| 1508 | __func__); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1509 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1511 | uid_specified = true; |
| 1512 | break; |
| 1513 | case Opt_cruid: |
Eric W. Biederman | 3da4656 | 2013-02-06 01:37:39 -0800 | [diff] [blame] | 1514 | if (get_option_uid(args, &vol->cred_uid)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1515 | cifs_dbg(VFS, "%s: Invalid cruid value\n", |
| 1516 | __func__); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1517 | goto cifs_parse_mount_err; |
| 1518 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1519 | break; |
| 1520 | case Opt_gid: |
Eric W. Biederman | 3da4656 | 2013-02-06 01:37:39 -0800 | [diff] [blame] | 1521 | if (get_option_gid(args, &vol->linux_gid)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1522 | cifs_dbg(VFS, "%s: Invalid gid value\n", |
| 1523 | __func__); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1524 | goto cifs_parse_mount_err; |
| 1525 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1526 | gid_specified = true; |
| 1527 | break; |
| 1528 | case Opt_file_mode: |
| 1529 | if (get_option_ul(args, &option)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1530 | cifs_dbg(VFS, "%s: Invalid file_mode value\n", |
| 1531 | __func__); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1532 | goto cifs_parse_mount_err; |
| 1533 | } |
| 1534 | vol->file_mode = option; |
| 1535 | break; |
| 1536 | case Opt_dirmode: |
| 1537 | if (get_option_ul(args, &option)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1538 | cifs_dbg(VFS, "%s: Invalid dir_mode value\n", |
| 1539 | __func__); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1540 | goto cifs_parse_mount_err; |
| 1541 | } |
| 1542 | vol->dir_mode = option; |
| 1543 | break; |
| 1544 | case Opt_port: |
Jeff Layton | b979aaa | 2012-11-26 11:09:55 -0500 | [diff] [blame] | 1545 | if (get_option_ul(args, &option) || |
| 1546 | option > USHRT_MAX) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1547 | cifs_dbg(VFS, "%s: Invalid port value\n", |
| 1548 | __func__); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1549 | goto cifs_parse_mount_err; |
| 1550 | } |
Jeff Layton | b979aaa | 2012-11-26 11:09:55 -0500 | [diff] [blame] | 1551 | port = (unsigned short)option; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1552 | break; |
| 1553 | case Opt_rsize: |
| 1554 | if (get_option_ul(args, &option)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1555 | cifs_dbg(VFS, "%s: Invalid rsize value\n", |
| 1556 | __func__); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1557 | goto cifs_parse_mount_err; |
| 1558 | } |
| 1559 | vol->rsize = option; |
| 1560 | break; |
| 1561 | case Opt_wsize: |
| 1562 | if (get_option_ul(args, &option)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1563 | cifs_dbg(VFS, "%s: Invalid wsize value\n", |
| 1564 | __func__); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1565 | goto cifs_parse_mount_err; |
| 1566 | } |
| 1567 | vol->wsize = option; |
| 1568 | break; |
| 1569 | case Opt_actimeo: |
| 1570 | if (get_option_ul(args, &option)) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1571 | cifs_dbg(VFS, "%s: Invalid actimeo value\n", |
| 1572 | __func__); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1573 | goto cifs_parse_mount_err; |
| 1574 | } |
| 1575 | vol->actimeo = HZ * option; |
| 1576 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1577 | cifs_dbg(VFS, "attribute cache timeout too large\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1578 | goto cifs_parse_mount_err; |
| 1579 | } |
| 1580 | break; |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 1581 | case Opt_echo_interval: |
| 1582 | if (get_option_ul(args, &option)) { |
| 1583 | cifs_dbg(VFS, "%s: Invalid echo interval value\n", |
| 1584 | __func__); |
| 1585 | goto cifs_parse_mount_err; |
| 1586 | } |
| 1587 | vol->echo_interval = option; |
| 1588 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1589 | |
| 1590 | /* String Arguments */ |
| 1591 | |
Sachin Prabhu | 4fe9e96 | 2012-04-10 18:12:27 +0100 | [diff] [blame] | 1592 | case Opt_blank_user: |
| 1593 | /* null user, ie. anonymous authentication */ |
| 1594 | vol->nullauth = 1; |
| 1595 | vol->username = NULL; |
| 1596 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1597 | case Opt_user: |
| 1598 | string = match_strdup(args); |
| 1599 | if (string == NULL) |
| 1600 | goto out_nomem; |
| 1601 | |
Scott Lovenberg | 8c3a2b4 | 2013-08-09 08:47:17 -0400 | [diff] [blame] | 1602 | if (strnlen(string, CIFS_MAX_USERNAME_LEN) > |
| 1603 | CIFS_MAX_USERNAME_LEN) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1604 | pr_warn("CIFS: username too long\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1605 | goto cifs_parse_mount_err; |
| 1606 | } |
Taesoo Kim | 2bd50fb | 2015-03-21 19:08:30 -0400 | [diff] [blame] | 1607 | |
| 1608 | kfree(vol->username); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1609 | vol->username = kstrdup(string, GFP_KERNEL); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1610 | if (!vol->username) |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1611 | goto cifs_parse_mount_err; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1612 | break; |
| 1613 | case Opt_blank_pass: |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1614 | /* passwords have to be handled differently |
| 1615 | * to allow the character used for deliminator |
| 1616 | * to be passed within them |
| 1617 | */ |
| 1618 | |
Sachin Prabhu | c369c9a | 2013-04-09 18:17:41 +0100 | [diff] [blame] | 1619 | /* |
| 1620 | * Check if this is a case where the password |
| 1621 | * starts with a delimiter |
| 1622 | */ |
| 1623 | tmp_end = strchr(data, '='); |
| 1624 | tmp_end++; |
| 1625 | if (!(tmp_end < end && tmp_end[1] == delim)) { |
| 1626 | /* No it is not. Set the password to NULL */ |
Namjae Jeon | d6ccf49 | 2014-08-21 19:11:20 +0900 | [diff] [blame] | 1627 | kfree(vol->password); |
Sachin Prabhu | c369c9a | 2013-04-09 18:17:41 +0100 | [diff] [blame] | 1628 | vol->password = NULL; |
| 1629 | break; |
| 1630 | } |
| 1631 | /* Yes it is. Drop down to Opt_pass below.*/ |
| 1632 | case Opt_pass: |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1633 | /* Obtain the value string */ |
| 1634 | value = strchr(data, '='); |
Sachin Prabhu | 1023807 | 2012-03-28 18:07:08 +0100 | [diff] [blame] | 1635 | value++; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1636 | |
| 1637 | /* Set tmp_end to end of the string */ |
| 1638 | tmp_end = (char *) value + strlen(value); |
| 1639 | |
| 1640 | /* Check if following character is the deliminator |
| 1641 | * If yes, we have encountered a double deliminator |
| 1642 | * reset the NULL character to the deliminator |
| 1643 | */ |
Suresh Jayaraman | e73f843 | 2012-06-12 07:15:50 +0530 | [diff] [blame] | 1644 | if (tmp_end < end && tmp_end[1] == delim) { |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1645 | tmp_end[0] = delim; |
| 1646 | |
Suresh Jayaraman | e73f843 | 2012-06-12 07:15:50 +0530 | [diff] [blame] | 1647 | /* Keep iterating until we get to a single |
| 1648 | * deliminator OR the end |
| 1649 | */ |
| 1650 | while ((tmp_end = strchr(tmp_end, delim)) |
| 1651 | != NULL && (tmp_end[1] == delim)) { |
| 1652 | tmp_end = (char *) &tmp_end[2]; |
| 1653 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1654 | |
Suresh Jayaraman | e73f843 | 2012-06-12 07:15:50 +0530 | [diff] [blame] | 1655 | /* Reset var options to point to next element */ |
| 1656 | if (tmp_end) { |
| 1657 | tmp_end[0] = '\0'; |
| 1658 | options = (char *) &tmp_end[1]; |
| 1659 | } else |
| 1660 | /* Reached the end of the mount option |
| 1661 | * string */ |
| 1662 | options = end; |
| 1663 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1664 | |
Namjae Jeon | d6ccf49 | 2014-08-21 19:11:20 +0900 | [diff] [blame] | 1665 | kfree(vol->password); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1666 | /* Now build new password string */ |
| 1667 | temp_len = strlen(value); |
| 1668 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
| 1669 | if (vol->password == NULL) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1670 | pr_warn("CIFS: no memory for password\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1671 | goto cifs_parse_mount_err; |
| 1672 | } |
| 1673 | |
| 1674 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
| 1675 | vol->password[j] = value[i]; |
| 1676 | if ((value[i] == delim) && |
| 1677 | value[i+1] == delim) |
| 1678 | /* skip the second deliminator */ |
| 1679 | i++; |
| 1680 | } |
| 1681 | vol->password[j] = '\0'; |
| 1682 | break; |
Sachin Prabhu | 4fe9e96 | 2012-04-10 18:12:27 +0100 | [diff] [blame] | 1683 | case Opt_blank_ip: |
Jeff Layton | b979aaa | 2012-11-26 11:09:55 -0500 | [diff] [blame] | 1684 | /* FIXME: should this be an error instead? */ |
| 1685 | got_ip = false; |
Sachin Prabhu | 4fe9e96 | 2012-04-10 18:12:27 +0100 | [diff] [blame] | 1686 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1687 | case Opt_ip: |
| 1688 | string = match_strdup(args); |
| 1689 | if (string == NULL) |
| 1690 | goto out_nomem; |
| 1691 | |
Jeff Layton | b979aaa | 2012-11-26 11:09:55 -0500 | [diff] [blame] | 1692 | if (!cifs_convert_address(dstaddr, string, |
| 1693 | strlen(string))) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1694 | pr_err("CIFS: bad ip= option (%s).\n", string); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1695 | goto cifs_parse_mount_err; |
| 1696 | } |
Jeff Layton | b979aaa | 2012-11-26 11:09:55 -0500 | [diff] [blame] | 1697 | got_ip = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1698 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1699 | case Opt_domain: |
| 1700 | string = match_strdup(args); |
| 1701 | if (string == NULL) |
| 1702 | goto out_nomem; |
| 1703 | |
Chen Gang | 057d633 | 2013-07-19 09:01:36 +0800 | [diff] [blame] | 1704 | if (strnlen(string, CIFS_MAX_DOMAINNAME_LEN) |
| 1705 | == CIFS_MAX_DOMAINNAME_LEN) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1706 | pr_warn("CIFS: domain name too long\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1707 | goto cifs_parse_mount_err; |
| 1708 | } |
| 1709 | |
Taesoo Kim | 2bd50fb | 2015-03-21 19:08:30 -0400 | [diff] [blame] | 1710 | kfree(vol->domainname); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1711 | vol->domainname = kstrdup(string, GFP_KERNEL); |
| 1712 | if (!vol->domainname) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1713 | pr_warn("CIFS: no memory for domainname\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1714 | goto cifs_parse_mount_err; |
| 1715 | } |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1716 | cifs_dbg(FYI, "Domain name set\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1717 | break; |
| 1718 | case Opt_srcaddr: |
| 1719 | string = match_strdup(args); |
| 1720 | if (string == NULL) |
| 1721 | goto out_nomem; |
| 1722 | |
Sachin Prabhu | 4fe9e96 | 2012-04-10 18:12:27 +0100 | [diff] [blame] | 1723 | if (!cifs_convert_address( |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1724 | (struct sockaddr *)&vol->srcaddr, |
| 1725 | string, strlen(string))) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1726 | pr_warn("CIFS: Could not parse srcaddr: %s\n", |
| 1727 | string); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1728 | goto cifs_parse_mount_err; |
| 1729 | } |
| 1730 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1731 | case Opt_iocharset: |
| 1732 | string = match_strdup(args); |
| 1733 | if (string == NULL) |
| 1734 | goto out_nomem; |
| 1735 | |
Sachin Prabhu | 4fe9e96 | 2012-04-10 18:12:27 +0100 | [diff] [blame] | 1736 | if (strnlen(string, 1024) >= 65) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1737 | pr_warn("CIFS: iocharset name too long.\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1738 | goto cifs_parse_mount_err; |
| 1739 | } |
| 1740 | |
Rasmus Villemoes | 87e747c | 2014-10-13 15:54:35 -0700 | [diff] [blame] | 1741 | if (strncasecmp(string, "default", 7) != 0) { |
Taesoo Kim | 2bd50fb | 2015-03-21 19:08:30 -0400 | [diff] [blame] | 1742 | kfree(vol->iocharset); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1743 | vol->iocharset = kstrdup(string, |
| 1744 | GFP_KERNEL); |
| 1745 | if (!vol->iocharset) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1746 | pr_warn("CIFS: no memory for charset\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1747 | goto cifs_parse_mount_err; |
| 1748 | } |
| 1749 | } |
| 1750 | /* if iocharset not set then load_nls_default |
| 1751 | * is used by caller |
| 1752 | */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1753 | cifs_dbg(FYI, "iocharset set to %s\n", string); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1754 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1755 | case Opt_netbiosname: |
| 1756 | string = match_strdup(args); |
| 1757 | if (string == NULL) |
| 1758 | goto out_nomem; |
| 1759 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1760 | memset(vol->source_rfc1001_name, 0x20, |
| 1761 | RFC1001_NAME_LEN); |
| 1762 | /* |
| 1763 | * FIXME: are there cases in which a comma can |
| 1764 | * be valid in workstation netbios name (and |
| 1765 | * need special handling)? |
| 1766 | */ |
| 1767 | for (i = 0; i < RFC1001_NAME_LEN; i++) { |
| 1768 | /* don't ucase netbiosname for user */ |
| 1769 | if (string[i] == 0) |
| 1770 | break; |
| 1771 | vol->source_rfc1001_name[i] = string[i]; |
| 1772 | } |
| 1773 | /* The string has 16th byte zero still from |
| 1774 | * set at top of the function |
| 1775 | */ |
| 1776 | if (i == RFC1001_NAME_LEN && string[i] != 0) |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1777 | pr_warn("CIFS: netbiosname longer than 15 truncated.\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1778 | break; |
| 1779 | case Opt_servern: |
| 1780 | /* servernetbiosname specified override *SMBSERVER */ |
| 1781 | string = match_strdup(args); |
| 1782 | if (string == NULL) |
| 1783 | goto out_nomem; |
| 1784 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1785 | /* last byte, type, is 0x20 for servr type */ |
| 1786 | memset(vol->target_rfc1001_name, 0x20, |
| 1787 | RFC1001_NAME_LEN_WITH_NULL); |
| 1788 | |
| 1789 | /* BB are there cases in which a comma can be |
| 1790 | valid in this workstation netbios name |
| 1791 | (and need special handling)? */ |
| 1792 | |
| 1793 | /* user or mount helper must uppercase the |
| 1794 | netbios name */ |
| 1795 | for (i = 0; i < 15; i++) { |
| 1796 | if (string[i] == 0) |
| 1797 | break; |
| 1798 | vol->target_rfc1001_name[i] = string[i]; |
| 1799 | } |
| 1800 | /* The string has 16th byte zero still from |
| 1801 | set at top of the function */ |
| 1802 | if (i == RFC1001_NAME_LEN && string[i] != 0) |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1803 | pr_warn("CIFS: server netbiosname longer than 15 truncated.\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1804 | break; |
| 1805 | case Opt_ver: |
| 1806 | string = match_strdup(args); |
| 1807 | if (string == NULL) |
| 1808 | goto out_nomem; |
| 1809 | |
Rasmus Villemoes | 87e747c | 2014-10-13 15:54:35 -0700 | [diff] [blame] | 1810 | if (strncasecmp(string, "1", 1) == 0) { |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1811 | /* This is the default */ |
| 1812 | break; |
| 1813 | } |
| 1814 | /* For all other value, error */ |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1815 | pr_warn("CIFS: Invalid version specified\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1816 | goto cifs_parse_mount_err; |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 1817 | case Opt_vers: |
| 1818 | string = match_strdup(args); |
| 1819 | if (string == NULL) |
| 1820 | goto out_nomem; |
| 1821 | |
| 1822 | if (cifs_parse_smb_version(string, vol) != 0) |
| 1823 | goto cifs_parse_mount_err; |
| 1824 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1825 | case Opt_sec: |
| 1826 | string = match_strdup(args); |
| 1827 | if (string == NULL) |
| 1828 | goto out_nomem; |
| 1829 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1830 | if (cifs_parse_security_flavors(string, vol) != 0) |
| 1831 | goto cifs_parse_mount_err; |
| 1832 | break; |
Jeff Layton | 15b6a47 | 2012-05-16 07:50:15 -0400 | [diff] [blame] | 1833 | case Opt_cache: |
| 1834 | string = match_strdup(args); |
| 1835 | if (string == NULL) |
| 1836 | goto out_nomem; |
| 1837 | |
| 1838 | if (cifs_parse_cache_flavor(string, vol) != 0) |
| 1839 | goto cifs_parse_mount_err; |
| 1840 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1841 | default: |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1842 | /* |
| 1843 | * An option we don't recognize. Save it off for later |
| 1844 | * if we haven't already found one |
| 1845 | */ |
| 1846 | if (!invalid) |
| 1847 | invalid = data; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1848 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1850 | /* Free up any allocated string */ |
| 1851 | kfree(string); |
| 1852 | string = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | } |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1854 | |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1855 | if (!sloppy && invalid) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1856 | pr_err("CIFS: Unknown mount option \"%s\"\n", invalid); |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1857 | goto cifs_parse_mount_err; |
| 1858 | } |
| 1859 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 1860 | #ifndef CONFIG_KEYS |
| 1861 | /* Muliuser mounts require CONFIG_KEYS support */ |
| 1862 | if (vol->multiuser) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1863 | cifs_dbg(VFS, "Multiuser mounts require kernels with CONFIG_KEYS enabled\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1864 | goto cifs_parse_mount_err; |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1865 | } |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 1866 | #endif |
Jeff Layton | e5e69ab | 2012-11-25 08:00:42 -0500 | [diff] [blame] | 1867 | if (!vol->UNC) { |
Jeff Layton | 37d4f99 | 2013-05-24 07:40:05 -0400 | [diff] [blame] | 1868 | cifs_dbg(VFS, "CIFS mount error: No usable UNC path provided in device string!\n"); |
Jeff Layton | e5e69ab | 2012-11-25 08:00:42 -0500 | [diff] [blame] | 1869 | goto cifs_parse_mount_err; |
| 1870 | } |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1871 | |
Jeff Layton | 62a1a43 | 2012-12-10 06:10:45 -0500 | [diff] [blame] | 1872 | /* make sure UNC has a share name */ |
| 1873 | if (!strchr(vol->UNC + 3, '\\')) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 1874 | cifs_dbg(VFS, "Malformed UNC. Unable to find share name.\n"); |
Jeff Layton | 62a1a43 | 2012-12-10 06:10:45 -0500 | [diff] [blame] | 1875 | goto cifs_parse_mount_err; |
| 1876 | } |
| 1877 | |
Jeff Layton | b979aaa | 2012-11-26 11:09:55 -0500 | [diff] [blame] | 1878 | if (!got_ip) { |
| 1879 | /* No ip= option specified? Try to get it from UNC */ |
| 1880 | if (!cifs_convert_address(dstaddr, &vol->UNC[2], |
| 1881 | strlen(&vol->UNC[2]))) { |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1882 | pr_err("Unable to determine destination address.\n"); |
Jeff Layton | b979aaa | 2012-11-26 11:09:55 -0500 | [diff] [blame] | 1883 | goto cifs_parse_mount_err; |
| 1884 | } |
| 1885 | } |
| 1886 | |
| 1887 | /* set the port that we got earlier */ |
| 1888 | cifs_set_port(dstaddr, port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1890 | if (uid_specified) |
| 1891 | vol->override_uid = override_uid; |
| 1892 | else if (override_uid == 1) |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1893 | pr_notice("CIFS: ignoring forceuid mount option specified with no uid= option.\n"); |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1894 | |
| 1895 | if (gid_specified) |
| 1896 | vol->override_gid = override_gid; |
| 1897 | else if (override_gid == 1) |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1898 | pr_notice("CIFS: ignoring forcegid mount option specified with no gid= option.\n"); |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1899 | |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1900 | kfree(mountdata_copy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | return 0; |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1902 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1903 | out_nomem: |
Andy Shevchenko | 0b456f0 | 2014-08-27 16:49:44 +0300 | [diff] [blame] | 1904 | pr_warn("Could not allocate temporary buffer\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1905 | cifs_parse_mount_err: |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1906 | kfree(string); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1907 | kfree(mountdata_copy); |
| 1908 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | } |
| 1910 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1911 | /** Returns true if srcaddr isn't specified and rhs isn't |
| 1912 | * specified, or if srcaddr is specified and |
| 1913 | * matches the IP address of the rhs argument. |
| 1914 | */ |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1915 | static bool |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1916 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) |
| 1917 | { |
| 1918 | switch (srcaddr->sa_family) { |
| 1919 | case AF_UNSPEC: |
| 1920 | return (rhs->sa_family == AF_UNSPEC); |
| 1921 | case AF_INET: { |
| 1922 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; |
| 1923 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; |
| 1924 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); |
| 1925 | } |
| 1926 | case AF_INET6: { |
| 1927 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; |
Nickolai Zeldovich | e3e2775 | 2013-01-16 21:36:17 -0500 | [diff] [blame] | 1928 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)rhs; |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1929 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
| 1930 | } |
| 1931 | default: |
| 1932 | WARN_ON(1); |
| 1933 | return false; /* don't expect to be here */ |
| 1934 | } |
| 1935 | } |
| 1936 | |
Pavel Shilovsky | 4b88613 | 2010-12-13 22:18:07 +0300 | [diff] [blame] | 1937 | /* |
| 1938 | * If no port is specified in addr structure, we try to match with 445 port |
| 1939 | * and if it fails - with 139 ports. It should be called only if address |
| 1940 | * families of server and addr are equal. |
| 1941 | */ |
| 1942 | static bool |
| 1943 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) |
| 1944 | { |
Steve French | 6da9791 | 2011-03-13 18:55:55 +0000 | [diff] [blame] | 1945 | __be16 port, *sport; |
Pavel Shilovsky | 4b88613 | 2010-12-13 22:18:07 +0300 | [diff] [blame] | 1946 | |
| 1947 | switch (addr->sa_family) { |
| 1948 | case AF_INET: |
| 1949 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; |
| 1950 | port = ((struct sockaddr_in *) addr)->sin_port; |
| 1951 | break; |
| 1952 | case AF_INET6: |
| 1953 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; |
| 1954 | port = ((struct sockaddr_in6 *) addr)->sin6_port; |
| 1955 | break; |
| 1956 | default: |
| 1957 | WARN_ON(1); |
| 1958 | return false; |
| 1959 | } |
| 1960 | |
| 1961 | if (!port) { |
| 1962 | port = htons(CIFS_PORT); |
| 1963 | if (port == *sport) |
| 1964 | return true; |
| 1965 | |
| 1966 | port = htons(RFC1001_PORT); |
| 1967 | } |
| 1968 | |
| 1969 | return port == *sport; |
| 1970 | } |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1971 | |
| 1972 | static bool |
| 1973 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
| 1974 | struct sockaddr *srcaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | { |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1976 | switch (addr->sa_family) { |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1977 | case AF_INET: { |
| 1978 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; |
| 1979 | struct sockaddr_in *srv_addr4 = |
| 1980 | (struct sockaddr_in *)&server->dstaddr; |
| 1981 | |
| 1982 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1983 | return false; |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1984 | break; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1985 | } |
| 1986 | case AF_INET6: { |
| 1987 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; |
| 1988 | struct sockaddr_in6 *srv_addr6 = |
| 1989 | (struct sockaddr_in6 *)&server->dstaddr; |
| 1990 | |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1991 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1992 | &srv_addr6->sin6_addr)) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1993 | return false; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1994 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1995 | return false; |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1996 | break; |
| 1997 | } |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 1998 | default: |
| 1999 | WARN_ON(1); |
| 2000 | return false; /* don't expect to be here */ |
| 2001 | } |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2002 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 2003 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
| 2004 | return false; |
| 2005 | |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2006 | return true; |
| 2007 | } |
| 2008 | |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2009 | static bool |
| 2010 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) |
| 2011 | { |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 2012 | /* |
| 2013 | * The select_sectype function should either return the vol->sectype |
| 2014 | * that was specified, or "Unspecified" if that sectype was not |
| 2015 | * compatible with the given NEGOTIATE request. |
| 2016 | */ |
| 2017 | if (select_sectype(server, vol->sectype) == Unspecified) |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2018 | return false; |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2019 | |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 2020 | /* |
| 2021 | * Now check if signing mode is acceptable. No need to check |
| 2022 | * global_secflags at this point since if MUST_SIGN is set then |
| 2023 | * the server->sign had better be too. |
| 2024 | */ |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 2025 | if (vol->sign && !server->sign) |
| 2026 | return false; |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2027 | |
| 2028 | return true; |
| 2029 | } |
| 2030 | |
Jeff Layton | 9fa114f | 2012-11-26 11:09:57 -0500 | [diff] [blame] | 2031 | static int match_server(struct TCP_Server_Info *server, struct smb_vol *vol) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2032 | { |
Jeff Layton | 9fa114f | 2012-11-26 11:09:57 -0500 | [diff] [blame] | 2033 | struct sockaddr *addr = (struct sockaddr *)&vol->dstaddr; |
| 2034 | |
Jeff Layton | a0b3df5 | 2013-05-24 07:40:59 -0400 | [diff] [blame] | 2035 | if (vol->nosharesock) |
| 2036 | return 0; |
| 2037 | |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 2038 | if ((server->vals != vol->vals) || (server->ops != vol->ops)) |
| 2039 | return 0; |
| 2040 | |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2041 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
| 2042 | return 0; |
| 2043 | |
| 2044 | if (!match_address(server, addr, |
| 2045 | (struct sockaddr *)&vol->srcaddr)) |
| 2046 | return 0; |
| 2047 | |
| 2048 | if (!match_port(server, addr)) |
| 2049 | return 0; |
| 2050 | |
| 2051 | if (!match_security(server, vol)) |
| 2052 | return 0; |
| 2053 | |
Rabin Vincent | b782fcc | 2016-07-19 09:25:45 +0200 | [diff] [blame] | 2054 | if (server->echo_interval != vol->echo_interval * HZ) |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 2055 | return 0; |
| 2056 | |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2057 | return 1; |
| 2058 | } |
| 2059 | |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2060 | static struct TCP_Server_Info * |
Jeff Layton | 9fa114f | 2012-11-26 11:09:57 -0500 | [diff] [blame] | 2061 | cifs_find_tcp_session(struct smb_vol *vol) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2062 | { |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2063 | struct TCP_Server_Info *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2065 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2066 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
Jeff Layton | 9fa114f | 2012-11-26 11:09:57 -0500 | [diff] [blame] | 2067 | if (!match_server(server, vol)) |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2068 | continue; |
| 2069 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2070 | ++server->srv_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2071 | spin_unlock(&cifs_tcp_ses_lock); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2072 | cifs_dbg(FYI, "Existing tcp session with server found\n"); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2073 | return server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2075 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | return NULL; |
| 2077 | } |
| 2078 | |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2079 | static void |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2080 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | { |
Steve French | a5c3e1c | 2014-09-16 04:16:19 -0500 | [diff] [blame] | 2082 | struct task_struct *task; |
| 2083 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2084 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2085 | if (--server->srv_count > 0) { |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2086 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2087 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | } |
Steve French | dea570e0 | 2008-05-06 22:05:51 +0000 | [diff] [blame] | 2089 | |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 2090 | put_net(cifs_net_ns(server)); |
| 2091 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2092 | list_del_init(&server->tcp_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2093 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2094 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 2095 | cancel_delayed_work_sync(&server->echo); |
| 2096 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2097 | spin_lock(&GlobalMid_Lock); |
| 2098 | server->tcpStatus = CifsExiting; |
| 2099 | spin_unlock(&GlobalMid_Lock); |
| 2100 | |
Shirish Pargaonkar | d2b9152 | 2010-10-21 14:25:08 -0500 | [diff] [blame] | 2101 | cifs_crypto_shash_release(server); |
Suresh Jayaraman | 488f1d2d | 2010-07-05 18:12:15 +0530 | [diff] [blame] | 2102 | cifs_fscache_release_client_cookie(server); |
| 2103 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 2104 | kfree(server->session_key.response); |
| 2105 | server->session_key.response = NULL; |
| 2106 | server->session_key.len = 0; |
Steve French | a5c3e1c | 2014-09-16 04:16:19 -0500 | [diff] [blame] | 2107 | |
| 2108 | task = xchg(&server->tsk, NULL); |
| 2109 | if (task) |
| 2110 | force_sig(SIGKILL, task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | } |
| 2112 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2113 | static struct TCP_Server_Info * |
| 2114 | cifs_get_tcp_session(struct smb_vol *volume_info) |
| 2115 | { |
| 2116 | struct TCP_Server_Info *tcp_ses = NULL; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2117 | int rc; |
| 2118 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2119 | cifs_dbg(FYI, "UNC: %s\n", volume_info->UNC); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2120 | |
| 2121 | /* see if we already have a matching tcp_ses */ |
Jeff Layton | 9fa114f | 2012-11-26 11:09:57 -0500 | [diff] [blame] | 2122 | tcp_ses = cifs_find_tcp_session(volume_info); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2123 | if (tcp_ses) |
| 2124 | return tcp_ses; |
| 2125 | |
| 2126 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); |
| 2127 | if (!tcp_ses) { |
| 2128 | rc = -ENOMEM; |
| 2129 | goto out_err; |
| 2130 | } |
| 2131 | |
Jeff Layton | 23db65f | 2012-05-15 12:20:51 -0400 | [diff] [blame] | 2132 | tcp_ses->ops = volume_info->ops; |
| 2133 | tcp_ses->vals = volume_info->vals; |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 2134 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2135 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
| 2136 | if (IS_ERR(tcp_ses->hostname)) { |
| 2137 | rc = PTR_ERR(tcp_ses->hostname); |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 2138 | goto out_err_crypto_release; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2139 | } |
| 2140 | |
| 2141 | tcp_ses->noblocksnd = volume_info->noblocksnd; |
| 2142 | tcp_ses->noautotune = volume_info->noautotune; |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 2143 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
Pavel Shilovsky | fc40f9c | 2012-02-17 17:09:12 +0300 | [diff] [blame] | 2144 | tcp_ses->in_flight = 0; |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 2145 | tcp_ses->credits = 1; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2146 | init_waitqueue_head(&tcp_ses->response_q); |
| 2147 | init_waitqueue_head(&tcp_ses->request_q); |
| 2148 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); |
| 2149 | mutex_init(&tcp_ses->srv_mutex); |
| 2150 | memcpy(tcp_ses->workstation_RFC1001_name, |
| 2151 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); |
| 2152 | memcpy(tcp_ses->server_RFC1001_name, |
| 2153 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 2154 | tcp_ses->session_estab = false; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2155 | tcp_ses->sequence_number = 0; |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 2156 | tcp_ses->lstrp = jiffies; |
Jeff Layton | 58fa015 | 2012-05-01 17:41:16 -0400 | [diff] [blame] | 2157 | spin_lock_init(&tcp_ses->req_lock); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2158 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
| 2159 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 2160 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
Jeff Layton | 9fa114f | 2012-11-26 11:09:57 -0500 | [diff] [blame] | 2161 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
| 2162 | sizeof(tcp_ses->srcaddr)); |
| 2163 | memcpy(&tcp_ses->dstaddr, &volume_info->dstaddr, |
| 2164 | sizeof(tcp_ses->dstaddr)); |
Sachin Prabhu | 39552ea | 2014-05-13 00:48:12 +0100 | [diff] [blame] | 2165 | #ifdef CONFIG_CIFS_SMB2 |
| 2166 | get_random_bytes(tcp_ses->client_guid, SMB2_CLIENT_GUID_SIZE); |
| 2167 | #endif |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2168 | /* |
| 2169 | * at this point we are the only ones with the pointer |
| 2170 | * to the struct since the kernel thread not created yet |
| 2171 | * no need to spinlock this init of tcpStatus or srv_count |
| 2172 | */ |
| 2173 | tcp_ses->tcpStatus = CifsNew; |
| 2174 | ++tcp_ses->srv_count; |
| 2175 | |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 2176 | if (volume_info->echo_interval >= SMB_ECHO_INTERVAL_MIN && |
| 2177 | volume_info->echo_interval <= SMB_ECHO_INTERVAL_MAX) |
| 2178 | tcp_ses->echo_interval = volume_info->echo_interval * HZ; |
| 2179 | else |
| 2180 | tcp_ses->echo_interval = SMB_ECHO_INTERVAL_DEFAULT * HZ; |
| 2181 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2182 | rc = ip_connect(tcp_ses); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2183 | if (rc < 0) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2184 | cifs_dbg(VFS, "Error connecting to socket. Aborting operation.\n"); |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 2185 | goto out_err_crypto_release; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2186 | } |
| 2187 | |
| 2188 | /* |
| 2189 | * since we're in a cifs function already, we know that |
| 2190 | * this will succeed. No need for try_module_get(). |
| 2191 | */ |
| 2192 | __module_get(THIS_MODULE); |
Al Viro | 7c97c20 | 2011-06-21 08:51:28 -0400 | [diff] [blame] | 2193 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2194 | tcp_ses, "cifsd"); |
| 2195 | if (IS_ERR(tcp_ses->tsk)) { |
| 2196 | rc = PTR_ERR(tcp_ses->tsk); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2197 | cifs_dbg(VFS, "error %d create cifsd thread\n", rc); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2198 | module_put(THIS_MODULE); |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 2199 | goto out_err_crypto_release; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2200 | } |
Steve French | fd88ce9 | 2011-04-12 01:01:14 +0000 | [diff] [blame] | 2201 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2202 | |
| 2203 | /* thread spawned, put it on the list */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2204 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2205 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2206 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2207 | |
Suresh Jayaraman | 488f1d2d | 2010-07-05 18:12:15 +0530 | [diff] [blame] | 2208 | cifs_fscache_get_client_cookie(tcp_ses); |
| 2209 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 2210 | /* queue echo request delayed work */ |
Steve French | adfeb3e | 2015-12-18 12:31:36 -0600 | [diff] [blame] | 2211 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, tcp_ses->echo_interval); |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 2212 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2213 | return tcp_ses; |
| 2214 | |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 2215 | out_err_crypto_release: |
Shirish Pargaonkar | d2b9152 | 2010-10-21 14:25:08 -0500 | [diff] [blame] | 2216 | cifs_crypto_shash_release(tcp_ses); |
| 2217 | |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 2218 | put_net(cifs_net_ns(tcp_ses)); |
| 2219 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2220 | out_err: |
| 2221 | if (tcp_ses) { |
Steve French | 8347a5c | 2009-10-06 18:31:29 +0000 | [diff] [blame] | 2222 | if (!IS_ERR(tcp_ses->hostname)) |
| 2223 | kfree(tcp_ses->hostname); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2224 | if (tcp_ses->ssocket) |
| 2225 | sock_release(tcp_ses->ssocket); |
| 2226 | kfree(tcp_ses); |
| 2227 | } |
| 2228 | return ERR_PTR(rc); |
| 2229 | } |
| 2230 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2231 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2232 | { |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 2233 | if (vol->sectype != Unspecified && |
| 2234 | vol->sectype != ses->sectype) |
| 2235 | return 0; |
| 2236 | |
| 2237 | switch (ses->sectype) { |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2238 | case Kerberos: |
Eric W. Biederman | 64ed39d | 2013-02-06 02:30:39 -0800 | [diff] [blame] | 2239 | if (!uid_eq(vol->cred_uid, ses->cred_uid)) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2240 | return 0; |
| 2241 | break; |
| 2242 | default: |
Jeff Layton | 04febab | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2243 | /* NULL username means anonymous session */ |
| 2244 | if (ses->user_name == NULL) { |
| 2245 | if (!vol->nullauth) |
| 2246 | return 0; |
| 2247 | break; |
| 2248 | } |
| 2249 | |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2250 | /* anything else takes username/password */ |
Jeff Layton | 04febab | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2251 | if (strncmp(ses->user_name, |
| 2252 | vol->username ? vol->username : "", |
Scott Lovenberg | 8c3a2b4 | 2013-08-09 08:47:17 -0400 | [diff] [blame] | 2253 | CIFS_MAX_USERNAME_LEN)) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2254 | return 0; |
Jeff Layton | 08b37d5 | 2014-05-23 06:53:10 -0400 | [diff] [blame] | 2255 | if ((vol->username && strlen(vol->username) != 0) && |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2256 | ses->password != NULL && |
| 2257 | strncmp(ses->password, |
| 2258 | vol->password ? vol->password : "", |
Scott Lovenberg | 8c3a2b4 | 2013-08-09 08:47:17 -0400 | [diff] [blame] | 2259 | CIFS_MAX_PASSWORD_LEN)) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2260 | return 0; |
| 2261 | } |
| 2262 | return 1; |
| 2263 | } |
| 2264 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2265 | static struct cifs_ses * |
Jeff Layton | 4ff67b7 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2266 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2268 | struct cifs_ses *ses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2270 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 4ff67b7 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2271 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
Shirish Pargaonkar | 7f48558 | 2013-10-12 10:06:03 -0500 | [diff] [blame] | 2272 | if (ses->status == CifsExiting) |
| 2273 | continue; |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2274 | if (!match_session(ses, vol)) |
| 2275 | continue; |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2276 | ++ses->ses_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2277 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2278 | return ses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2279 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2280 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2281 | return NULL; |
| 2282 | } |
| 2283 | |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2284 | static void |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2285 | cifs_put_smb_ses(struct cifs_ses *ses) |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2286 | { |
Shirish Pargaonkar | 7f48558 | 2013-10-12 10:06:03 -0500 | [diff] [blame] | 2287 | unsigned int rc, xid; |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2288 | struct TCP_Server_Info *server = ses->server; |
| 2289 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2290 | cifs_dbg(FYI, "%s: ses_count=%d\n", __func__, ses->ses_count); |
Shirish Pargaonkar | 7f48558 | 2013-10-12 10:06:03 -0500 | [diff] [blame] | 2291 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2292 | spin_lock(&cifs_tcp_ses_lock); |
Shirish Pargaonkar | 7f48558 | 2013-10-12 10:06:03 -0500 | [diff] [blame] | 2293 | if (ses->status == CifsExiting) { |
| 2294 | spin_unlock(&cifs_tcp_ses_lock); |
| 2295 | return; |
| 2296 | } |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2297 | if (--ses->ses_count > 0) { |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2298 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2299 | return; |
| 2300 | } |
Shirish Pargaonkar | 7f48558 | 2013-10-12 10:06:03 -0500 | [diff] [blame] | 2301 | if (ses->status == CifsGood) |
| 2302 | ses->status = CifsExiting; |
| 2303 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2304 | |
Shirish Pargaonkar | 7f48558 | 2013-10-12 10:06:03 -0500 | [diff] [blame] | 2305 | if (ses->status == CifsExiting && server->ops->logoff) { |
| 2306 | xid = get_xid(); |
| 2307 | rc = server->ops->logoff(xid, ses); |
| 2308 | if (rc) |
| 2309 | cifs_dbg(VFS, "%s: Session Logoff failure rc=%d\n", |
| 2310 | __func__, rc); |
| 2311 | _free_xid(xid); |
| 2312 | } |
| 2313 | |
| 2314 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2315 | list_del_init(&ses->smb_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2316 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2317 | |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2318 | sesInfoFree(ses); |
| 2319 | cifs_put_tcp_session(server); |
| 2320 | } |
| 2321 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2322 | #ifdef CONFIG_KEYS |
| 2323 | |
Chen Gang | 057d633 | 2013-07-19 09:01:36 +0800 | [diff] [blame] | 2324 | /* strlen("cifs:a:") + CIFS_MAX_DOMAINNAME_LEN + 1 */ |
| 2325 | #define CIFSCREDS_DESC_SIZE (7 + CIFS_MAX_DOMAINNAME_LEN + 1) |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2326 | |
| 2327 | /* Populate username and pw fields from keyring if possible */ |
| 2328 | static int |
| 2329 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) |
| 2330 | { |
| 2331 | int rc = 0; |
David Howells | 146aa8b | 2015-10-21 14:04:48 +0100 | [diff] [blame] | 2332 | const char *delim, *payload; |
| 2333 | char *desc; |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2334 | ssize_t len; |
| 2335 | struct key *key; |
| 2336 | struct TCP_Server_Info *server = ses->server; |
| 2337 | struct sockaddr_in *sa; |
| 2338 | struct sockaddr_in6 *sa6; |
David Howells | 146aa8b | 2015-10-21 14:04:48 +0100 | [diff] [blame] | 2339 | const struct user_key_payload *upayload; |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2340 | |
| 2341 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); |
| 2342 | if (!desc) |
| 2343 | return -ENOMEM; |
| 2344 | |
| 2345 | /* try to find an address key first */ |
| 2346 | switch (server->dstaddr.ss_family) { |
| 2347 | case AF_INET: |
| 2348 | sa = (struct sockaddr_in *)&server->dstaddr; |
| 2349 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); |
| 2350 | break; |
| 2351 | case AF_INET6: |
| 2352 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; |
| 2353 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); |
| 2354 | break; |
| 2355 | default: |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2356 | cifs_dbg(FYI, "Bad ss_family (%hu)\n", |
| 2357 | server->dstaddr.ss_family); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2358 | rc = -EINVAL; |
| 2359 | goto out_err; |
| 2360 | } |
| 2361 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2362 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2363 | key = request_key(&key_type_logon, desc, ""); |
| 2364 | if (IS_ERR(key)) { |
| 2365 | if (!ses->domainName) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2366 | cifs_dbg(FYI, "domainName is NULL\n"); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2367 | rc = PTR_ERR(key); |
| 2368 | goto out_err; |
| 2369 | } |
| 2370 | |
| 2371 | /* didn't work, try to find a domain key */ |
| 2372 | sprintf(desc, "cifs:d:%s", ses->domainName); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2373 | cifs_dbg(FYI, "%s: desc=%s\n", __func__, desc); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2374 | key = request_key(&key_type_logon, desc, ""); |
| 2375 | if (IS_ERR(key)) { |
| 2376 | rc = PTR_ERR(key); |
| 2377 | goto out_err; |
| 2378 | } |
| 2379 | } |
| 2380 | |
| 2381 | down_read(&key->sem); |
David Howells | 146aa8b | 2015-10-21 14:04:48 +0100 | [diff] [blame] | 2382 | upayload = user_key_payload(key); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2383 | if (IS_ERR_OR_NULL(upayload)) { |
Jeff Layton | 4edc53c | 2012-02-07 06:30:51 -0500 | [diff] [blame] | 2384 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2385 | goto out_key_put; |
| 2386 | } |
| 2387 | |
| 2388 | /* find first : in payload */ |
David Howells | 146aa8b | 2015-10-21 14:04:48 +0100 | [diff] [blame] | 2389 | payload = upayload->data; |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2390 | delim = strnchr(payload, upayload->datalen, ':'); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2391 | cifs_dbg(FYI, "payload=%s\n", payload); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2392 | if (!delim) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2393 | cifs_dbg(FYI, "Unable to find ':' in payload (datalen=%d)\n", |
| 2394 | upayload->datalen); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2395 | rc = -EINVAL; |
| 2396 | goto out_key_put; |
| 2397 | } |
| 2398 | |
| 2399 | len = delim - payload; |
Scott Lovenberg | 8c3a2b4 | 2013-08-09 08:47:17 -0400 | [diff] [blame] | 2400 | if (len > CIFS_MAX_USERNAME_LEN || len <= 0) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2401 | cifs_dbg(FYI, "Bad value from username search (len=%zd)\n", |
| 2402 | len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2403 | rc = -EINVAL; |
| 2404 | goto out_key_put; |
| 2405 | } |
| 2406 | |
| 2407 | vol->username = kstrndup(payload, len, GFP_KERNEL); |
| 2408 | if (!vol->username) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2409 | cifs_dbg(FYI, "Unable to allocate %zd bytes for username\n", |
| 2410 | len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2411 | rc = -ENOMEM; |
| 2412 | goto out_key_put; |
| 2413 | } |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2414 | cifs_dbg(FYI, "%s: username=%s\n", __func__, vol->username); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2415 | |
| 2416 | len = key->datalen - (len + 1); |
Scott Lovenberg | 8c3a2b4 | 2013-08-09 08:47:17 -0400 | [diff] [blame] | 2417 | if (len > CIFS_MAX_PASSWORD_LEN || len <= 0) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2418 | cifs_dbg(FYI, "Bad len for password search (len=%zd)\n", len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2419 | rc = -EINVAL; |
| 2420 | kfree(vol->username); |
| 2421 | vol->username = NULL; |
| 2422 | goto out_key_put; |
| 2423 | } |
| 2424 | |
| 2425 | ++delim; |
| 2426 | vol->password = kstrndup(delim, len, GFP_KERNEL); |
| 2427 | if (!vol->password) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2428 | cifs_dbg(FYI, "Unable to allocate %zd bytes for password\n", |
| 2429 | len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2430 | rc = -ENOMEM; |
| 2431 | kfree(vol->username); |
| 2432 | vol->username = NULL; |
| 2433 | goto out_key_put; |
| 2434 | } |
| 2435 | |
| 2436 | out_key_put: |
| 2437 | up_read(&key->sem); |
| 2438 | key_put(key); |
| 2439 | out_err: |
| 2440 | kfree(desc); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2441 | cifs_dbg(FYI, "%s: returning %d\n", __func__, rc); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2442 | return rc; |
| 2443 | } |
| 2444 | #else /* ! CONFIG_KEYS */ |
| 2445 | static inline int |
| 2446 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), |
| 2447 | struct cifs_ses *ses __attribute__((unused))) |
| 2448 | { |
| 2449 | return -ENOSYS; |
| 2450 | } |
| 2451 | #endif /* CONFIG_KEYS */ |
| 2452 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2453 | static struct cifs_ses * |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2454 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
| 2455 | { |
Pavel Shilovsky | 286170a | 2012-05-25 10:43:58 +0400 | [diff] [blame] | 2456 | int rc = -ENOMEM; |
| 2457 | unsigned int xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2458 | struct cifs_ses *ses; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2459 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
| 2460 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2461 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2462 | xid = get_xid(); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2463 | |
Jeff Layton | 4ff67b7 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2464 | ses = cifs_find_smb_ses(server, volume_info); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2465 | if (ses) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2466 | cifs_dbg(FYI, "Existing smb sess found (status=%d)\n", |
| 2467 | ses->status); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2468 | |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2469 | mutex_lock(&ses->session_mutex); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 2470 | rc = cifs_negotiate_protocol(xid, ses); |
| 2471 | if (rc) { |
| 2472 | mutex_unlock(&ses->session_mutex); |
| 2473 | /* problem -- put our ses reference */ |
| 2474 | cifs_put_smb_ses(ses); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2475 | free_xid(xid); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 2476 | return ERR_PTR(rc); |
| 2477 | } |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2478 | if (ses->need_reconnect) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2479 | cifs_dbg(FYI, "Session needs reconnect\n"); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2480 | rc = cifs_setup_session(xid, ses, |
| 2481 | volume_info->local_nls); |
| 2482 | if (rc) { |
| 2483 | mutex_unlock(&ses->session_mutex); |
| 2484 | /* problem -- put our reference */ |
| 2485 | cifs_put_smb_ses(ses); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2486 | free_xid(xid); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2487 | return ERR_PTR(rc); |
| 2488 | } |
| 2489 | } |
| 2490 | mutex_unlock(&ses->session_mutex); |
Jeff Layton | 460cf34 | 2010-09-14 11:38:24 -0400 | [diff] [blame] | 2491 | |
| 2492 | /* existing SMB ses has a server reference already */ |
| 2493 | cifs_put_tcp_session(server); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2494 | free_xid(xid); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2495 | return ses; |
| 2496 | } |
| 2497 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2498 | cifs_dbg(FYI, "Existing smb sess not found\n"); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2499 | ses = sesInfoAlloc(); |
| 2500 | if (ses == NULL) |
| 2501 | goto get_ses_fail; |
| 2502 | |
| 2503 | /* new SMB session uses our server ref */ |
| 2504 | ses->server = server; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2505 | if (server->dstaddr.ss_family == AF_INET6) |
| 2506 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2507 | else |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2508 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2509 | |
Steve French | 8727c8a | 2011-02-25 01:11:56 -0600 | [diff] [blame] | 2510 | if (volume_info->username) { |
| 2511 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); |
| 2512 | if (!ses->user_name) |
| 2513 | goto get_ses_fail; |
| 2514 | } |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2515 | |
| 2516 | /* volume_info->password freed at unmount */ |
| 2517 | if (volume_info->password) { |
| 2518 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); |
| 2519 | if (!ses->password) |
| 2520 | goto get_ses_fail; |
| 2521 | } |
| 2522 | if (volume_info->domainname) { |
Shirish Pargaonkar | d3686d5 | 2010-10-28 09:53:07 -0500 | [diff] [blame] | 2523 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
| 2524 | if (!ses->domainName) |
| 2525 | goto get_ses_fail; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2526 | } |
Jeff Layton | 3e4b3e1 | 2010-07-19 18:00:17 -0400 | [diff] [blame] | 2527 | ses->cred_uid = volume_info->cred_uid; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2528 | ses->linux_uid = volume_info->linux_uid; |
Steve French | d9b9420 | 2011-04-12 01:24:57 +0000 | [diff] [blame] | 2529 | |
Jeff Layton | 28e11bd | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 2530 | ses->sectype = volume_info->sectype; |
| 2531 | ses->sign = volume_info->sign; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2532 | |
| 2533 | mutex_lock(&ses->session_mutex); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 2534 | rc = cifs_negotiate_protocol(xid, ses); |
| 2535 | if (!rc) |
| 2536 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2537 | mutex_unlock(&ses->session_mutex); |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 2538 | if (rc) |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2539 | goto get_ses_fail; |
| 2540 | |
| 2541 | /* success, put it on the list */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2542 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2543 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2544 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2545 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2546 | free_xid(xid); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2547 | return ses; |
| 2548 | |
| 2549 | get_ses_fail: |
| 2550 | sesInfoFree(ses); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2551 | free_xid(xid); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2552 | return ERR_PTR(rc); |
| 2553 | } |
| 2554 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2555 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2556 | { |
| 2557 | if (tcon->tidStatus == CifsExiting) |
| 2558 | return 0; |
| 2559 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) |
| 2560 | return 0; |
| 2561 | return 1; |
| 2562 | } |
| 2563 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2564 | static struct cifs_tcon * |
| 2565 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | { |
| 2567 | struct list_head *tmp; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2568 | struct cifs_tcon *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2570 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2571 | list_for_each(tmp, &ses->tcon_list) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2572 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2573 | if (!match_tcon(tcon, unc)) |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2574 | continue; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2575 | ++tcon->tc_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2576 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2577 | return tcon; |
| 2578 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2579 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2580 | return NULL; |
| 2581 | } |
| 2582 | |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2583 | static void |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2584 | cifs_put_tcon(struct cifs_tcon *tcon) |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2585 | { |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2586 | unsigned int xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2587 | struct cifs_ses *ses = tcon->ses; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2588 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2589 | cifs_dbg(FYI, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2590 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2591 | if (--tcon->tc_count > 0) { |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2592 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2593 | return; |
| 2594 | } |
| 2595 | |
| 2596 | list_del_init(&tcon->tcon_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2597 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2598 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2599 | xid = get_xid(); |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2600 | if (ses->server->ops->tree_disconnect) |
| 2601 | ses->server->ops->tree_disconnect(xid, tcon); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2602 | _free_xid(xid); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2603 | |
Suresh Jayaraman | d03382c | 2010-07-05 18:12:27 +0530 | [diff] [blame] | 2604 | cifs_fscache_release_super_cookie(tcon); |
Steve French | 9f84159 | 2010-07-23 20:37:53 +0000 | [diff] [blame] | 2605 | tconInfoFree(tcon); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2606 | cifs_put_smb_ses(ses); |
| 2607 | } |
| 2608 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2609 | static struct cifs_tcon * |
| 2610 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2611 | { |
| 2612 | int rc, xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2613 | struct cifs_tcon *tcon; |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2614 | |
| 2615 | tcon = cifs_find_tcon(ses, volume_info->UNC); |
| 2616 | if (tcon) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2617 | cifs_dbg(FYI, "Found match on UNC path\n"); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2618 | /* existing tcon already has a reference */ |
| 2619 | cifs_put_smb_ses(ses); |
| 2620 | if (tcon->seal != volume_info->seal) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2621 | cifs_dbg(VFS, "transport encryption setting conflicts with existing tid\n"); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2622 | return tcon; |
| 2623 | } |
| 2624 | |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2625 | if (!ses->server->ops->tree_connect) { |
| 2626 | rc = -ENOSYS; |
| 2627 | goto out_fail; |
| 2628 | } |
| 2629 | |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2630 | tcon = tconInfoAlloc(); |
| 2631 | if (tcon == NULL) { |
| 2632 | rc = -ENOMEM; |
| 2633 | goto out_fail; |
| 2634 | } |
| 2635 | |
| 2636 | tcon->ses = ses; |
| 2637 | if (volume_info->password) { |
| 2638 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); |
| 2639 | if (!tcon->password) { |
| 2640 | rc = -ENOMEM; |
| 2641 | goto out_fail; |
| 2642 | } |
| 2643 | } |
| 2644 | |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2645 | /* |
| 2646 | * BB Do we need to wrap session_mutex around this TCon call and Unix |
| 2647 | * SetFS as we do on SessSetup and reconnect? |
| 2648 | */ |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2649 | xid = get_xid(); |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2650 | rc = ses->server->ops->tree_connect(xid, ses, volume_info->UNC, tcon, |
| 2651 | volume_info->local_nls); |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 2652 | free_xid(xid); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2653 | cifs_dbg(FYI, "Tcon rc = %d\n", rc); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2654 | if (rc) |
| 2655 | goto out_fail; |
| 2656 | |
| 2657 | if (volume_info->nodfs) { |
| 2658 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2659 | cifs_dbg(FYI, "DFS disabled (%d)\n", tcon->Flags); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2660 | } |
| 2661 | tcon->seal = volume_info->seal; |
Steve French | b618f00 | 2015-11-03 09:15:03 -0600 | [diff] [blame] | 2662 | tcon->use_persistent = false; |
| 2663 | /* check if SMB2 or later, CIFS does not support persistent handles */ |
| 2664 | if (volume_info->persistent) { |
| 2665 | if (ses->server->vals->protocol_id == 0) { |
| 2666 | cifs_dbg(VFS, |
| 2667 | "SMB3 or later required for persistent handles\n"); |
| 2668 | rc = -EOPNOTSUPP; |
| 2669 | goto out_fail; |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 2670 | #ifdef CONFIG_CIFS_SMB2 |
Steve French | b618f00 | 2015-11-03 09:15:03 -0600 | [diff] [blame] | 2671 | } else if (ses->server->capabilities & |
| 2672 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) |
| 2673 | tcon->use_persistent = true; |
| 2674 | else /* persistent handles requested but not supported */ { |
| 2675 | cifs_dbg(VFS, |
| 2676 | "Persistent handles not supported on share\n"); |
| 2677 | rc = -EOPNOTSUPP; |
| 2678 | goto out_fail; |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 2679 | #endif /* CONFIG_CIFS_SMB2 */ |
Steve French | b618f00 | 2015-11-03 09:15:03 -0600 | [diff] [blame] | 2680 | } |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 2681 | #ifdef CONFIG_CIFS_SMB2 |
Steve French | b618f00 | 2015-11-03 09:15:03 -0600 | [diff] [blame] | 2682 | } else if ((tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) |
| 2683 | && (ses->server->capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) |
| 2684 | && (volume_info->nopersistent == false)) { |
| 2685 | cifs_dbg(FYI, "enabling persistent handles\n"); |
| 2686 | tcon->use_persistent = true; |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 2687 | #endif /* CONFIG_CIFS_SMB2 */ |
| 2688 | } else if (volume_info->resilient) { |
| 2689 | if (ses->server->vals->protocol_id == 0) { |
| 2690 | cifs_dbg(VFS, |
| 2691 | "SMB2.1 or later required for resilient handles\n"); |
| 2692 | rc = -EOPNOTSUPP; |
| 2693 | goto out_fail; |
| 2694 | } |
| 2695 | tcon->use_resilient = true; |
Steve French | b618f00 | 2015-11-03 09:15:03 -0600 | [diff] [blame] | 2696 | } |
| 2697 | |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2698 | /* |
| 2699 | * We can have only one retry value for a connection to a share so for |
| 2700 | * resources mounted more than once to the same server share the last |
| 2701 | * value passed in for the retry flag is used. |
| 2702 | */ |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2703 | tcon->retry = volume_info->retry; |
| 2704 | tcon->nocase = volume_info->nocase; |
| 2705 | tcon->local_lease = volume_info->local_lease; |
Pavel Shilovsky | 233839b | 2012-09-19 06:22:45 -0700 | [diff] [blame] | 2706 | INIT_LIST_HEAD(&tcon->pending_opens); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2707 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2708 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2709 | list_add(&tcon->tcon_list, &ses->tcon_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2710 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2711 | |
Suresh Jayaraman | d03382c | 2010-07-05 18:12:27 +0530 | [diff] [blame] | 2712 | cifs_fscache_get_super_cookie(tcon); |
| 2713 | |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2714 | return tcon; |
| 2715 | |
| 2716 | out_fail: |
| 2717 | tconInfoFree(tcon); |
| 2718 | return ERR_PTR(rc); |
| 2719 | } |
| 2720 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 2721 | void |
| 2722 | cifs_put_tlink(struct tcon_link *tlink) |
| 2723 | { |
| 2724 | if (!tlink || IS_ERR(tlink)) |
| 2725 | return; |
| 2726 | |
| 2727 | if (!atomic_dec_and_test(&tlink->tl_count) || |
| 2728 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { |
| 2729 | tlink->tl_time = jiffies; |
| 2730 | return; |
| 2731 | } |
| 2732 | |
| 2733 | if (!IS_ERR(tlink_tcon(tlink))) |
| 2734 | cifs_put_tcon(tlink_tcon(tlink)); |
| 2735 | kfree(tlink); |
| 2736 | return; |
| 2737 | } |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2738 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2739 | static inline struct tcon_link * |
Pavel Shilovsky | cd51875 | 2011-06-09 12:58:53 +0400 | [diff] [blame] | 2740 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
| 2741 | { |
| 2742 | return cifs_sb->master_tlink; |
| 2743 | } |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2744 | |
| 2745 | static int |
| 2746 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) |
| 2747 | { |
| 2748 | struct cifs_sb_info *old = CIFS_SB(sb); |
| 2749 | struct cifs_sb_info *new = mnt_data->cifs_sb; |
| 2750 | |
| 2751 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) |
| 2752 | return 0; |
| 2753 | |
| 2754 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != |
| 2755 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) |
| 2756 | return 0; |
| 2757 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2758 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 2759 | * We want to share sb only if we don't specify an r/wsize or |
| 2760 | * specified r/wsize is greater than or equal to existing one. |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2761 | */ |
| 2762 | if (new->wsize && new->wsize < old->wsize) |
| 2763 | return 0; |
| 2764 | |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 2765 | if (new->rsize && new->rsize < old->rsize) |
| 2766 | return 0; |
| 2767 | |
Eric W. Biederman | 1f68233 | 2013-02-06 01:20:20 -0800 | [diff] [blame] | 2768 | if (!uid_eq(old->mnt_uid, new->mnt_uid) || !gid_eq(old->mnt_gid, new->mnt_gid)) |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2769 | return 0; |
| 2770 | |
| 2771 | if (old->mnt_file_mode != new->mnt_file_mode || |
| 2772 | old->mnt_dir_mode != new->mnt_dir_mode) |
| 2773 | return 0; |
| 2774 | |
| 2775 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) |
| 2776 | return 0; |
| 2777 | |
| 2778 | if (old->actimeo != new->actimeo) |
| 2779 | return 0; |
| 2780 | |
| 2781 | return 1; |
| 2782 | } |
| 2783 | |
| 2784 | int |
| 2785 | cifs_match_super(struct super_block *sb, void *data) |
| 2786 | { |
| 2787 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; |
| 2788 | struct smb_vol *volume_info; |
| 2789 | struct cifs_sb_info *cifs_sb; |
| 2790 | struct TCP_Server_Info *tcp_srv; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2791 | struct cifs_ses *ses; |
| 2792 | struct cifs_tcon *tcon; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2793 | struct tcon_link *tlink; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2794 | int rc = 0; |
| 2795 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2796 | spin_lock(&cifs_tcp_ses_lock); |
| 2797 | cifs_sb = CIFS_SB(sb); |
| 2798 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); |
| 2799 | if (IS_ERR(tlink)) { |
| 2800 | spin_unlock(&cifs_tcp_ses_lock); |
| 2801 | return rc; |
| 2802 | } |
| 2803 | tcon = tlink_tcon(tlink); |
| 2804 | ses = tcon->ses; |
| 2805 | tcp_srv = ses->server; |
| 2806 | |
| 2807 | volume_info = mnt_data->vol; |
| 2808 | |
Jeff Layton | 9fa114f | 2012-11-26 11:09:57 -0500 | [diff] [blame] | 2809 | if (!match_server(tcp_srv, volume_info) || |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2810 | !match_session(ses, volume_info) || |
| 2811 | !match_tcon(tcon, volume_info->UNC)) { |
| 2812 | rc = 0; |
| 2813 | goto out; |
| 2814 | } |
| 2815 | |
| 2816 | rc = compare_mount_options(sb, mnt_data); |
| 2817 | out: |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2818 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f484b5d0 | 2011-07-11 10:16:34 -0400 | [diff] [blame] | 2819 | cifs_put_tlink(tlink); |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2820 | return rc; |
| 2821 | } |
| 2822 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2823 | int |
Pavel Shilovsky | b669f33 | 2012-05-27 20:21:53 +0400 | [diff] [blame] | 2824 | get_dfs_path(const unsigned int xid, struct cifs_ses *ses, const char *old_path, |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2825 | const struct nls_table *nls_codepage, unsigned int *num_referrals, |
| 2826 | struct dfs_info3_param **referrals, int remap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2827 | { |
| 2828 | char *temp_unc; |
| 2829 | int rc = 0; |
| 2830 | |
Pavel Shilovsky | b669f33 | 2012-05-27 20:21:53 +0400 | [diff] [blame] | 2831 | if (!ses->server->ops->tree_connect || !ses->server->ops->get_dfs_refer) |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2832 | return -ENOSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2833 | |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2834 | *num_referrals = 0; |
| 2835 | *referrals = NULL; |
| 2836 | |
| 2837 | if (ses->ipc_tid == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | temp_unc = kmalloc(2 /* for slashes */ + |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2839 | strnlen(ses->serverName, SERVER_NAME_LEN_WITH_NULL * 2) |
| 2840 | + 1 + 4 /* slash IPC$ */ + 2, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2841 | if (temp_unc == NULL) |
| 2842 | return -ENOMEM; |
| 2843 | temp_unc[0] = '\\'; |
| 2844 | temp_unc[1] = '\\'; |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2845 | strcpy(temp_unc + 2, ses->serverName); |
| 2846 | strcpy(temp_unc + 2 + strlen(ses->serverName), "\\IPC$"); |
| 2847 | rc = ses->server->ops->tree_connect(xid, ses, temp_unc, NULL, |
| 2848 | nls_codepage); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2849 | cifs_dbg(FYI, "Tcon rc = %d ipc_tid = %d\n", rc, ses->ipc_tid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | kfree(temp_unc); |
| 2851 | } |
| 2852 | if (rc == 0) |
Pavel Shilovsky | b669f33 | 2012-05-27 20:21:53 +0400 | [diff] [blame] | 2853 | rc = ses->server->ops->get_dfs_refer(xid, ses, old_path, |
| 2854 | referrals, num_referrals, |
| 2855 | nls_codepage, remap); |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2856 | /* |
| 2857 | * BB - map targetUNCs to dfs_info3 structures, here or in |
Pavel Shilovsky | b669f33 | 2012-05-27 20:21:53 +0400 | [diff] [blame] | 2858 | * ses->server->ops->get_dfs_refer. |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 2859 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2860 | |
| 2861 | return rc; |
| 2862 | } |
| 2863 | |
Jeff Layton | 09e50d5 | 2008-07-23 10:11:19 -0400 | [diff] [blame] | 2864 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 2865 | static struct lock_class_key cifs_key[2]; |
| 2866 | static struct lock_class_key cifs_slock_key[2]; |
| 2867 | |
| 2868 | static inline void |
| 2869 | cifs_reclassify_socket4(struct socket *sock) |
| 2870 | { |
| 2871 | struct sock *sk = sock->sk; |
Hannes Frederic Sowa | fafc4e1 | 2016-04-08 15:11:27 +0200 | [diff] [blame] | 2872 | BUG_ON(!sock_allow_reclassification(sk)); |
Jeff Layton | 09e50d5 | 2008-07-23 10:11:19 -0400 | [diff] [blame] | 2873 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
| 2874 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); |
| 2875 | } |
| 2876 | |
| 2877 | static inline void |
| 2878 | cifs_reclassify_socket6(struct socket *sock) |
| 2879 | { |
| 2880 | struct sock *sk = sock->sk; |
Hannes Frederic Sowa | fafc4e1 | 2016-04-08 15:11:27 +0200 | [diff] [blame] | 2881 | BUG_ON(!sock_allow_reclassification(sk)); |
Jeff Layton | 09e50d5 | 2008-07-23 10:11:19 -0400 | [diff] [blame] | 2882 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
| 2883 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); |
| 2884 | } |
| 2885 | #else |
| 2886 | static inline void |
| 2887 | cifs_reclassify_socket4(struct socket *sock) |
| 2888 | { |
| 2889 | } |
| 2890 | |
| 2891 | static inline void |
| 2892 | cifs_reclassify_socket6(struct socket *sock) |
| 2893 | { |
| 2894 | } |
| 2895 | #endif |
| 2896 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2897 | /* See RFC1001 section 14 on representation of Netbios names */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2898 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2899 | { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2900 | unsigned int i, j; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2902 | for (i = 0, j = 0; i < (length); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2903 | /* mask a nibble at a time and encode */ |
| 2904 | target[j] = 'A' + (0x0F & (source[i] >> 4)); |
| 2905 | target[j+1] = 'A' + (0x0F & source[i]); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2906 | j += 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2907 | } |
| 2908 | |
| 2909 | } |
| 2910 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 2911 | static int |
| 2912 | bind_socket(struct TCP_Server_Info *server) |
| 2913 | { |
| 2914 | int rc = 0; |
| 2915 | if (server->srcaddr.ss_family != AF_UNSPEC) { |
| 2916 | /* Bind to the specified local IP address */ |
| 2917 | struct socket *socket = server->ssocket; |
| 2918 | rc = socket->ops->bind(socket, |
| 2919 | (struct sockaddr *) &server->srcaddr, |
| 2920 | sizeof(server->srcaddr)); |
| 2921 | if (rc < 0) { |
| 2922 | struct sockaddr_in *saddr4; |
| 2923 | struct sockaddr_in6 *saddr6; |
| 2924 | saddr4 = (struct sockaddr_in *)&server->srcaddr; |
| 2925 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; |
| 2926 | if (saddr6->sin6_family == AF_INET6) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2927 | cifs_dbg(VFS, "Failed to bind to: %pI6c, error: %d\n", |
| 2928 | &saddr6->sin6_addr, rc); |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 2929 | else |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 2930 | cifs_dbg(VFS, "Failed to bind to: %pI4, error: %d\n", |
| 2931 | &saddr4->sin_addr.s_addr, rc); |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 2932 | } |
| 2933 | } |
| 2934 | return rc; |
| 2935 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2936 | |
| 2937 | static int |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2938 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2939 | { |
| 2940 | int rc = 0; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2941 | /* |
| 2942 | * some servers require RFC1001 sessinit before sending |
| 2943 | * negprot - BB check reconnection in case where second |
| 2944 | * sessinit is sent but no second negprot |
| 2945 | */ |
| 2946 | struct rfc1002_session_packet *ses_init_buf; |
| 2947 | struct smb_hdr *smb_buf; |
| 2948 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), |
| 2949 | GFP_KERNEL); |
| 2950 | if (ses_init_buf) { |
| 2951 | ses_init_buf->trailer.session_req.called_len = 32; |
| 2952 | |
Colin Ian King | 997152f | 2016-01-25 16:25:54 +0000 | [diff] [blame] | 2953 | if (server->server_RFC1001_name[0] != 0) |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2954 | rfc1002mangle(ses_init_buf->trailer. |
| 2955 | session_req.called_name, |
| 2956 | server->server_RFC1001_name, |
| 2957 | RFC1001_NAME_LEN_WITH_NULL); |
| 2958 | else |
| 2959 | rfc1002mangle(ses_init_buf->trailer. |
| 2960 | session_req.called_name, |
| 2961 | DEFAULT_CIFS_CALLED_NAME, |
| 2962 | RFC1001_NAME_LEN_WITH_NULL); |
| 2963 | |
| 2964 | ses_init_buf->trailer.session_req.calling_len = 32; |
| 2965 | |
| 2966 | /* |
| 2967 | * calling name ends in null (byte 16) from old smb |
| 2968 | * convention. |
| 2969 | */ |
Steve French | c85c35f | 2015-03-27 01:15:02 -0500 | [diff] [blame] | 2970 | if (server->workstation_RFC1001_name[0] != 0) |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2971 | rfc1002mangle(ses_init_buf->trailer. |
| 2972 | session_req.calling_name, |
| 2973 | server->workstation_RFC1001_name, |
| 2974 | RFC1001_NAME_LEN_WITH_NULL); |
| 2975 | else |
| 2976 | rfc1002mangle(ses_init_buf->trailer. |
| 2977 | session_req.calling_name, |
| 2978 | "LINUX_CIFS_CLNT", |
| 2979 | RFC1001_NAME_LEN_WITH_NULL); |
| 2980 | |
| 2981 | ses_init_buf->trailer.session_req.scope1 = 0; |
| 2982 | ses_init_buf->trailer.session_req.scope2 = 0; |
| 2983 | smb_buf = (struct smb_hdr *)ses_init_buf; |
| 2984 | |
| 2985 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ |
Steve French | be8e3b0 | 2011-04-29 05:40:20 +0000 | [diff] [blame] | 2986 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2987 | rc = smb_send(server, smb_buf, 0x44); |
| 2988 | kfree(ses_init_buf); |
| 2989 | /* |
| 2990 | * RFC1001 layer in at least one server |
| 2991 | * requires very short break before negprot |
| 2992 | * presumably because not expecting negprot |
| 2993 | * to follow so fast. This is a simple |
| 2994 | * solution that works without |
| 2995 | * complicating the code and causes no |
| 2996 | * significant slowing down on mount |
| 2997 | * for everyone else |
| 2998 | */ |
| 2999 | usleep_range(1000, 2000); |
| 3000 | } |
| 3001 | /* |
| 3002 | * else the negprot may still work without this |
| 3003 | * even though malloc failed |
| 3004 | */ |
| 3005 | |
| 3006 | return rc; |
| 3007 | } |
| 3008 | |
| 3009 | static int |
| 3010 | generic_ip_connect(struct TCP_Server_Info *server) |
| 3011 | { |
| 3012 | int rc = 0; |
Steve French | 6da9791 | 2011-03-13 18:55:55 +0000 | [diff] [blame] | 3013 | __be16 sport; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3014 | int slen, sfamily; |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 3015 | struct socket *socket = server->ssocket; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3016 | struct sockaddr *saddr; |
| 3017 | |
| 3018 | saddr = (struct sockaddr *) &server->dstaddr; |
| 3019 | |
| 3020 | if (server->dstaddr.ss_family == AF_INET6) { |
| 3021 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; |
| 3022 | slen = sizeof(struct sockaddr_in6); |
| 3023 | sfamily = AF_INET6; |
| 3024 | } else { |
| 3025 | sport = ((struct sockaddr_in *) saddr)->sin_port; |
| 3026 | slen = sizeof(struct sockaddr_in); |
| 3027 | sfamily = AF_INET; |
| 3028 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3029 | |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 3030 | if (socket == NULL) { |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 3031 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
| 3032 | IPPROTO_TCP, &socket, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3033 | if (rc < 0) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3034 | cifs_dbg(VFS, "Error %d creating socket\n", rc); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3035 | server->ssocket = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3036 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3037 | } |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 3038 | |
| 3039 | /* BB other socket options to set KEEPALIVE, NODELAY? */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3040 | cifs_dbg(FYI, "Socket created\n"); |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 3041 | server->ssocket = socket; |
| 3042 | socket->sk->sk_allocation = GFP_NOFS; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3043 | if (sfamily == AF_INET6) |
| 3044 | cifs_reclassify_socket6(socket); |
| 3045 | else |
| 3046 | cifs_reclassify_socket4(socket); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3047 | } |
| 3048 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 3049 | rc = bind_socket(server); |
| 3050 | if (rc < 0) |
| 3051 | return rc; |
| 3052 | |
Jeff Layton | d5c5605 | 2008-12-01 18:42:33 -0500 | [diff] [blame] | 3053 | /* |
| 3054 | * Eventually check for other socket options to change from |
| 3055 | * the default. sock_setsockopt not used because it expects |
| 3056 | * user space buffer |
| 3057 | */ |
| 3058 | socket->sk->sk_rcvtimeo = 7 * HZ; |
Steve French | da505c3 | 2009-01-19 03:49:35 +0000 | [diff] [blame] | 3059 | socket->sk->sk_sndtimeo = 5 * HZ; |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 3060 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3061 | /* make the bufsizes depend on wsize/rsize and max requests */ |
| 3062 | if (server->noautotune) { |
| 3063 | if (socket->sk->sk_sndbuf < (200 * 1024)) |
| 3064 | socket->sk->sk_sndbuf = 200 * 1024; |
| 3065 | if (socket->sk->sk_rcvbuf < (140 * 1024)) |
| 3066 | socket->sk->sk_rcvbuf = 140 * 1024; |
| 3067 | } |
| 3068 | |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 3069 | if (server->tcp_nodelay) { |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3070 | int val = 1; |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 3071 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
| 3072 | (char *)&val, sizeof(val)); |
| 3073 | if (rc) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3074 | cifs_dbg(FYI, "set TCP_NODELAY socket option error %d\n", |
| 3075 | rc); |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 3076 | } |
| 3077 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3078 | cifs_dbg(FYI, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx\n", |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3079 | socket->sk->sk_sndbuf, |
| 3080 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
| 3081 | |
Jeff Layton | ee1b3ea | 2011-06-21 07:18:26 -0400 | [diff] [blame] | 3082 | rc = socket->ops->connect(socket, saddr, slen, 0); |
| 3083 | if (rc < 0) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3084 | cifs_dbg(FYI, "Error %d connecting to server\n", rc); |
Jeff Layton | ee1b3ea | 2011-06-21 07:18:26 -0400 | [diff] [blame] | 3085 | sock_release(socket); |
| 3086 | server->ssocket = NULL; |
| 3087 | return rc; |
| 3088 | } |
| 3089 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3090 | if (sport == htons(RFC1001_PORT)) |
| 3091 | rc = ip_rfc1001_connect(server); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3092 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3093 | return rc; |
| 3094 | } |
| 3095 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3096 | static int |
| 3097 | ip_connect(struct TCP_Server_Info *server) |
| 3098 | { |
Steve French | 6da9791 | 2011-03-13 18:55:55 +0000 | [diff] [blame] | 3099 | __be16 *sport; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3100 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
| 3101 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
| 3102 | |
| 3103 | if (server->dstaddr.ss_family == AF_INET6) |
| 3104 | sport = &addr6->sin6_port; |
| 3105 | else |
| 3106 | sport = &addr->sin_port; |
| 3107 | |
| 3108 | if (*sport == 0) { |
| 3109 | int rc; |
| 3110 | |
| 3111 | /* try with 445 port at first */ |
| 3112 | *sport = htons(CIFS_PORT); |
| 3113 | |
| 3114 | rc = generic_ip_connect(server); |
| 3115 | if (rc >= 0) |
| 3116 | return rc; |
| 3117 | |
| 3118 | /* if it failed, try with 139 port */ |
| 3119 | *sport = htons(RFC1001_PORT); |
| 3120 | } |
| 3121 | |
| 3122 | return generic_ip_connect(server); |
| 3123 | } |
| 3124 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 3125 | void reset_cifs_unix_caps(unsigned int xid, struct cifs_tcon *tcon, |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3126 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3127 | { |
| 3128 | /* if we are reconnecting then should we check to see if |
| 3129 | * any requested capabilities changed locally e.g. via |
| 3130 | * remount but we can not do much about it here |
| 3131 | * if they have (even if we could detect it by the following) |
| 3132 | * Perhaps we could add a backpointer to array of sb from tcon |
| 3133 | * or if we change to make all sb to same share the same |
| 3134 | * sb as NFS - then we only have one backpointer to sb. |
| 3135 | * What if we wanted to mount the server share twice once with |
| 3136 | * and once without posixacls or posix paths? */ |
| 3137 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3138 | |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 3139 | if (vol_info && vol_info->no_linux_ext) { |
| 3140 | tcon->fsUnixInfo.Capability = 0; |
| 3141 | tcon->unix_ext = 0; /* Unix Extensions disabled */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3142 | cifs_dbg(FYI, "Linux protocol extensions disabled\n"); |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 3143 | return; |
| 3144 | } else if (vol_info) |
| 3145 | tcon->unix_ext = 1; /* Unix Extensions supported */ |
| 3146 | |
| 3147 | if (tcon->unix_ext == 0) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3148 | cifs_dbg(FYI, "Unix extensions disabled so not set on reconnect\n"); |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 3149 | return; |
| 3150 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3151 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 3152 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3153 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3154 | cifs_dbg(FYI, "unix caps which server supports %lld\n", cap); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3155 | /* check for reconnect case in which we do not |
| 3156 | want to change the mount behavior if we can avoid it */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 3157 | if (vol_info == NULL) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3158 | /* turn off POSIX ACL and PATHNAMES if not set |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3159 | originally at mount time */ |
| 3160 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) |
| 3161 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
Igor Mammedov | 11b6d64 | 2008-02-15 19:06:04 +0000 | [diff] [blame] | 3162 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
| 3163 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3164 | cifs_dbg(VFS, "POSIXPATH support change\n"); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3165 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
Igor Mammedov | 11b6d64 | 2008-02-15 19:06:04 +0000 | [diff] [blame] | 3166 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3167 | cifs_dbg(VFS, "possible reconnect error\n"); |
| 3168 | cifs_dbg(VFS, "server disabled POSIX path support\n"); |
Igor Mammedov | 11b6d64 | 2008-02-15 19:06:04 +0000 | [diff] [blame] | 3169 | } |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3170 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3171 | |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3172 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3173 | cifs_dbg(VFS, "per-share encryption not supported yet\n"); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3174 | |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3175 | cap &= CIFS_UNIX_CAP_MASK; |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3176 | if (vol_info && vol_info->no_psx_acl) |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3177 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3178 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3179 | cifs_dbg(FYI, "negotiated posix acl support\n"); |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3180 | if (cifs_sb) |
| 3181 | cifs_sb->mnt_cifs_flags |= |
| 3182 | CIFS_MOUNT_POSIXACL; |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3183 | } |
| 3184 | |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3185 | if (vol_info && vol_info->posix_paths == 0) |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3186 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3187 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3188 | cifs_dbg(FYI, "negotiate posix pathnames\n"); |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3189 | if (cifs_sb) |
| 3190 | cifs_sb->mnt_cifs_flags |= |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3191 | CIFS_MOUNT_POSIX_PATHS; |
| 3192 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3193 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3194 | cifs_dbg(FYI, "Negotiate caps 0x%x\n", (int)cap); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3195 | #ifdef CONFIG_CIFS_DEBUG2 |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3196 | if (cap & CIFS_UNIX_FCNTL_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3197 | cifs_dbg(FYI, "FCNTL cap\n"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3198 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3199 | cifs_dbg(FYI, "EXTATTR cap\n"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3200 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3201 | cifs_dbg(FYI, "POSIX path cap\n"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3202 | if (cap & CIFS_UNIX_XATTR_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3203 | cifs_dbg(FYI, "XATTR cap\n"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3204 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3205 | cifs_dbg(FYI, "POSIX ACL cap\n"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3206 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3207 | cifs_dbg(FYI, "very large read cap\n"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3208 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3209 | cifs_dbg(FYI, "very large write cap\n"); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3210 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3211 | cifs_dbg(FYI, "transport encryption cap\n"); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3212 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3213 | cifs_dbg(FYI, "mandatory transport encryption cap\n"); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3214 | #endif /* CIFS_DEBUG2 */ |
| 3215 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { |
Steve French | 442aa31 | 2007-09-24 20:25:46 +0000 | [diff] [blame] | 3216 | if (vol_info == NULL) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3217 | cifs_dbg(FYI, "resetting capabilities failed\n"); |
Steve French | 442aa31 | 2007-09-24 20:25:46 +0000 | [diff] [blame] | 3218 | } else |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3219 | 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 French | 5a44b31 | 2007-09-20 15:16:24 +0000 | [diff] [blame] | 3220 | |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3221 | } |
| 3222 | } |
| 3223 | } |
| 3224 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3225 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
| 3226 | struct cifs_sb_info *cifs_sb) |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 3227 | { |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3228 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
| 3229 | |
Al Viro | 2ced6f6 | 2011-06-17 09:20:04 -0400 | [diff] [blame] | 3230 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
| 3231 | cifs_sb->tlink_tree = RB_ROOT; |
| 3232 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 3233 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3234 | * Temporarily set r/wsize for matching superblock. If we end up using |
| 3235 | * new sb then client will later negotiate it downward if needed. |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 3236 | */ |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3237 | cifs_sb->rsize = pvolume_info->rsize; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 3238 | cifs_sb->wsize = pvolume_info->wsize; |
| 3239 | |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3240 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
| 3241 | cifs_sb->mnt_gid = pvolume_info->linux_gid; |
| 3242 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; |
| 3243 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3244 | cifs_dbg(FYI, "file mode: 0x%hx dir mode: 0x%hx\n", |
| 3245 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3246 | |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 3247 | cifs_sb->actimeo = pvolume_info->actimeo; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3248 | cifs_sb->local_nls = pvolume_info->local_nls; |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 3249 | |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3250 | if (pvolume_info->noperm) |
| 3251 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; |
| 3252 | if (pvolume_info->setuids) |
| 3253 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; |
| 3254 | if (pvolume_info->server_ino) |
| 3255 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; |
| 3256 | if (pvolume_info->remap) |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 3257 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SFM_CHR; |
| 3258 | if (pvolume_info->sfu_remap) |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3259 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
| 3260 | if (pvolume_info->no_xattr) |
| 3261 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; |
| 3262 | if (pvolume_info->sfu_emul) |
| 3263 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; |
| 3264 | if (pvolume_info->nobrl) |
| 3265 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; |
Steve French | be65244 | 2009-02-23 15:21:59 +0000 | [diff] [blame] | 3266 | if (pvolume_info->nostrictsync) |
Steve French | 4717bed | 2009-02-24 14:44:19 +0000 | [diff] [blame] | 3267 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 3268 | if (pvolume_info->mand_lock) |
| 3269 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 3270 | if (pvolume_info->rwpidforward) |
| 3271 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3272 | if (pvolume_info->cifs_acl) |
| 3273 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; |
Sachin Prabhu | 3c7c87f | 2012-04-24 15:28:14 +0100 | [diff] [blame] | 3274 | if (pvolume_info->backupuid_specified) { |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 3275 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
Sachin Prabhu | 3c7c87f | 2012-04-24 15:28:14 +0100 | [diff] [blame] | 3276 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
| 3277 | } |
| 3278 | if (pvolume_info->backupgid_specified) { |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 3279 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
Sachin Prabhu | 3c7c87f | 2012-04-24 15:28:14 +0100 | [diff] [blame] | 3280 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
| 3281 | } |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3282 | if (pvolume_info->override_uid) |
| 3283 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; |
| 3284 | if (pvolume_info->override_gid) |
| 3285 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; |
| 3286 | if (pvolume_info->dynperm) |
| 3287 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; |
Suresh Jayaraman | fa1df75 | 2010-07-05 18:13:36 +0530 | [diff] [blame] | 3288 | if (pvolume_info->fsc) |
| 3289 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3290 | if (pvolume_info->multiuser) |
| 3291 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | |
| 3292 | CIFS_MOUNT_NO_PERM); |
Pavel Shilovsky | d39454f | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 3293 | if (pvolume_info->strict_io) |
| 3294 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3295 | if (pvolume_info->direct_io) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3296 | cifs_dbg(FYI, "mounting share using direct i/o\n"); |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3297 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
| 3298 | } |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 3299 | if (pvolume_info->mfsymlinks) { |
| 3300 | if (pvolume_info->sfu_emul) { |
Steve French | db8b631 | 2014-09-22 05:13:55 -0500 | [diff] [blame] | 3301 | /* |
| 3302 | * Our SFU ("Services for Unix" emulation does not allow |
| 3303 | * creating symlinks but does allow reading existing SFU |
| 3304 | * symlinks (it does allow both creating and reading SFU |
| 3305 | * style mknod and FIFOs though). When "mfsymlinks" and |
| 3306 | * "sfu" are both enabled at the same time, it allows |
| 3307 | * reading both types of symlinks, but will only create |
| 3308 | * them with mfsymlinks format. This allows better |
| 3309 | * Apple compatibility (probably better for Samba too) |
| 3310 | * while still recognizing old Windows style symlinks. |
| 3311 | */ |
| 3312 | cifs_dbg(VFS, "mount options mfsymlinks and sfu both enabled\n"); |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 3313 | } |
Steve French | db8b631 | 2014-09-22 05:13:55 -0500 | [diff] [blame] | 3314 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 3315 | } |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3316 | |
| 3317 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3318 | cifs_dbg(VFS, "mount option dynperm ignored if cifsacl mount option supported\n"); |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 3319 | } |
| 3320 | |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3321 | static void |
| 3322 | cleanup_volume_info_contents(struct smb_vol *volume_info) |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3323 | { |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 3324 | kfree(volume_info->username); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3325 | kzfree(volume_info->password); |
Jesper Juhl | 95c7545 | 2011-08-27 18:58:34 +0200 | [diff] [blame] | 3326 | kfree(volume_info->UNC); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 3327 | kfree(volume_info->domainname); |
| 3328 | kfree(volume_info->iocharset); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3329 | kfree(volume_info->prepath); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3330 | } |
| 3331 | |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3332 | void |
| 3333 | cifs_cleanup_volume_info(struct smb_vol *volume_info) |
| 3334 | { |
| 3335 | if (!volume_info) |
| 3336 | return; |
| 3337 | cleanup_volume_info_contents(volume_info); |
| 3338 | kfree(volume_info); |
| 3339 | } |
| 3340 | |
| 3341 | |
Steve French | 2d6d589 | 2009-04-09 00:36:44 +0000 | [diff] [blame] | 3342 | #ifdef CONFIG_CIFS_DFS_UPCALL |
Steve French | 6d3ea7e | 2012-11-28 22:34:41 -0600 | [diff] [blame] | 3343 | /* |
| 3344 | * cifs_build_path_to_root returns full path to root when we do not have an |
| 3345 | * exiting connection (tcon) |
| 3346 | */ |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3347 | static char * |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3348 | build_unc_path_to_root(const struct smb_vol *vol, |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3349 | const struct cifs_sb_info *cifs_sb) |
| 3350 | { |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3351 | char *full_path, *pos; |
Jeff Layton | 839db3d | 2012-12-10 06:10:45 -0500 | [diff] [blame] | 3352 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) + 1 : 0; |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3353 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3354 | |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3355 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3356 | if (full_path == NULL) |
| 3357 | return ERR_PTR(-ENOMEM); |
| 3358 | |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3359 | strncpy(full_path, vol->UNC, unc_len); |
| 3360 | pos = full_path + unc_len; |
| 3361 | |
| 3362 | if (pplen) { |
Jeff Layton | 1fc29ba | 2013-05-31 10:00:18 -0400 | [diff] [blame] | 3363 | *pos = CIFS_DIR_SEP(cifs_sb); |
| 3364 | strncpy(pos + 1, vol->prepath, pplen); |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3365 | pos += pplen; |
| 3366 | } |
| 3367 | |
| 3368 | *pos = '\0'; /* add trailing null */ |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 3369 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3370 | cifs_dbg(FYI, "%s: full_path=%s\n", __func__, full_path); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3371 | return full_path; |
| 3372 | } |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3373 | |
| 3374 | /* |
| 3375 | * Perform a dfs referral query for a share and (optionally) prefix |
| 3376 | * |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3377 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
| 3378 | * to a string containing updated options for the submount. Otherwise it |
| 3379 | * will be left untouched. |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3380 | * |
| 3381 | * Returns the rc from get_dfs_path to the caller, which can be used to |
| 3382 | * determine whether there were referrals. |
| 3383 | */ |
| 3384 | static int |
Pavel Shilovsky | b669f33 | 2012-05-27 20:21:53 +0400 | [diff] [blame] | 3385 | expand_dfs_referral(const unsigned int xid, struct cifs_ses *ses, |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3386 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3387 | int check_prefix) |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3388 | { |
| 3389 | int rc; |
| 3390 | unsigned int num_referrals = 0; |
| 3391 | struct dfs_info3_param *referrals = NULL; |
| 3392 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; |
| 3393 | |
| 3394 | full_path = build_unc_path_to_root(volume_info, cifs_sb); |
| 3395 | if (IS_ERR(full_path)) |
| 3396 | return PTR_ERR(full_path); |
| 3397 | |
| 3398 | /* For DFS paths, skip the first '\' of the UNC */ |
| 3399 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; |
| 3400 | |
Pavel Shilovsky | b669f33 | 2012-05-27 20:21:53 +0400 | [diff] [blame] | 3401 | rc = get_dfs_path(xid, ses, ref_path, cifs_sb->local_nls, |
Steve French | 2baa268 | 2014-09-27 02:19:01 -0500 | [diff] [blame] | 3402 | &num_referrals, &referrals, cifs_remap(cifs_sb)); |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3403 | |
| 3404 | if (!rc && num_referrals > 0) { |
| 3405 | char *fake_devname = NULL; |
| 3406 | |
| 3407 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, |
| 3408 | full_path + 1, referrals, |
| 3409 | &fake_devname); |
| 3410 | |
| 3411 | free_dfs_info_array(referrals, num_referrals); |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3412 | |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3413 | if (IS_ERR(mdata)) { |
| 3414 | rc = PTR_ERR(mdata); |
| 3415 | mdata = NULL; |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3416 | } else { |
| 3417 | cleanup_volume_info_contents(volume_info); |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3418 | rc = cifs_setup_volume_info(volume_info, mdata, |
| 3419 | fake_devname); |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3420 | } |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3421 | kfree(fake_devname); |
| 3422 | kfree(cifs_sb->mountdata); |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3423 | cifs_sb->mountdata = mdata; |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3424 | } |
| 3425 | kfree(full_path); |
| 3426 | return rc; |
| 3427 | } |
Steve French | 2d6d589 | 2009-04-09 00:36:44 +0000 | [diff] [blame] | 3428 | #endif |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3429 | |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3430 | static int |
| 3431 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
| 3432 | const char *devname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3433 | { |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3434 | int rc = 0; |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3435 | |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3436 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
| 3437 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3438 | |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3439 | if (volume_info->nullauth) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3440 | cifs_dbg(FYI, "Anonymous login\n"); |
Jeff Layton | 04febab | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 3441 | kfree(volume_info->username); |
| 3442 | volume_info->username = NULL; |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3443 | } else if (volume_info->username) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3444 | /* BB fixme parse for domain name here */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3445 | cifs_dbg(FYI, "Username: %s\n", volume_info->username); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3446 | } else { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3447 | cifs_dbg(VFS, "No username specified\n"); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3448 | /* In userspace mount helper we can get user name from alternate |
| 3449 | locations such as env variables and files on disk */ |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3450 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3451 | } |
| 3452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3453 | /* this is needed for ASCII cp to Unicode converts */ |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3454 | if (volume_info->iocharset == NULL) { |
Jeff Layton | a5fc4ce | 2010-04-24 07:57:42 -0400 | [diff] [blame] | 3455 | /* load_nls_default cannot return null */ |
| 3456 | volume_info->local_nls = load_nls_default(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3457 | } else { |
Jeff Layton | a5fc4ce | 2010-04-24 07:57:42 -0400 | [diff] [blame] | 3458 | volume_info->local_nls = load_nls(volume_info->iocharset); |
| 3459 | if (volume_info->local_nls == NULL) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3460 | cifs_dbg(VFS, "CIFS mount error: iocharset %s not found\n", |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3461 | volume_info->iocharset); |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3462 | return -ELIBACC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3463 | } |
| 3464 | } |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3465 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3466 | return rc; |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3467 | } |
| 3468 | |
| 3469 | struct smb_vol * |
| 3470 | cifs_get_volume_info(char *mount_data, const char *devname) |
| 3471 | { |
| 3472 | int rc; |
| 3473 | struct smb_vol *volume_info; |
| 3474 | |
Jeff Layton | 6ee9542 | 2012-11-26 11:09:57 -0500 | [diff] [blame] | 3475 | volume_info = kmalloc(sizeof(struct smb_vol), GFP_KERNEL); |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3476 | if (!volume_info) |
| 3477 | return ERR_PTR(-ENOMEM); |
| 3478 | |
| 3479 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); |
| 3480 | if (rc) { |
| 3481 | cifs_cleanup_volume_info(volume_info); |
| 3482 | volume_info = ERR_PTR(rc); |
| 3483 | } |
| 3484 | |
| 3485 | return volume_info; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3486 | } |
| 3487 | |
Aurelien Aptel | a6b5058 | 2016-05-25 19:59:09 +0200 | [diff] [blame] | 3488 | static int |
| 3489 | cifs_are_all_path_components_accessible(struct TCP_Server_Info *server, |
| 3490 | unsigned int xid, |
| 3491 | struct cifs_tcon *tcon, |
| 3492 | struct cifs_sb_info *cifs_sb, |
| 3493 | char *full_path) |
| 3494 | { |
| 3495 | int rc; |
| 3496 | char *s; |
| 3497 | char sep, tmp; |
| 3498 | |
| 3499 | sep = CIFS_DIR_SEP(cifs_sb); |
| 3500 | s = full_path; |
| 3501 | |
| 3502 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, ""); |
| 3503 | while (rc == 0) { |
| 3504 | /* skip separators */ |
| 3505 | while (*s == sep) |
| 3506 | s++; |
| 3507 | if (!*s) |
| 3508 | break; |
| 3509 | /* next separator */ |
| 3510 | while (*s && *s != sep) |
| 3511 | s++; |
| 3512 | |
| 3513 | /* |
| 3514 | * temporarily null-terminate the path at the end of |
| 3515 | * the current component |
| 3516 | */ |
| 3517 | tmp = *s; |
| 3518 | *s = 0; |
| 3519 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
| 3520 | full_path); |
| 3521 | *s = tmp; |
| 3522 | } |
| 3523 | return rc; |
| 3524 | } |
| 3525 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3526 | int |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3527 | cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info) |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3528 | { |
Jeff Layton | 1daaae8 | 2012-03-21 06:30:40 -0400 | [diff] [blame] | 3529 | int rc; |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 3530 | unsigned int xid; |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3531 | struct cifs_ses *ses; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3532 | struct cifs_tcon *tcon; |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3533 | struct TCP_Server_Info *server; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3534 | char *full_path; |
| 3535 | struct tcon_link *tlink; |
| 3536 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 3537 | int referral_walks_count = 0; |
Jeff Layton | 2054749 | 2011-07-09 12:21:07 -0400 | [diff] [blame] | 3538 | #endif |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3539 | |
Christoph Hellwig | b4caecd | 2015-01-14 10:42:32 +0100 | [diff] [blame] | 3540 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs"); |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3541 | if (rc) |
| 3542 | return rc; |
| 3543 | |
Jeff Layton | 2054749 | 2011-07-09 12:21:07 -0400 | [diff] [blame] | 3544 | #ifdef CONFIG_CIFS_DFS_UPCALL |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3545 | try_mount_again: |
| 3546 | /* cleanup activities if we're chasing a referral */ |
| 3547 | if (referral_walks_count) { |
| 3548 | if (tcon) |
| 3549 | cifs_put_tcon(tcon); |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3550 | else if (ses) |
| 3551 | cifs_put_smb_ses(ses); |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3552 | |
Sachin Prabhu | 1dfd18d | 2015-06-16 16:36:17 +0100 | [diff] [blame] | 3553 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_POSIX_PATHS; |
| 3554 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 3555 | free_xid(xid); |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3556 | } |
| 3557 | #endif |
Jeff Layton | 1daaae8 | 2012-03-21 06:30:40 -0400 | [diff] [blame] | 3558 | rc = 0; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3559 | tcon = NULL; |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3560 | ses = NULL; |
| 3561 | server = NULL; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3562 | full_path = NULL; |
| 3563 | tlink = NULL; |
| 3564 | |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 3565 | xid = get_xid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3566 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 3567 | /* get a reference to a tcp session */ |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3568 | server = cifs_get_tcp_session(volume_info); |
| 3569 | if (IS_ERR(server)) { |
| 3570 | rc = PTR_ERR(server); |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3571 | bdi_destroy(&cifs_sb->bdi); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 3572 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3573 | } |
| 3574 | |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 3575 | /* get a reference to a SMB session */ |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3576 | ses = cifs_get_smb_ses(server, volume_info); |
| 3577 | if (IS_ERR(ses)) { |
| 3578 | rc = PTR_ERR(ses); |
| 3579 | ses = NULL; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 3580 | goto mount_fail_check; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3581 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3582 | |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 3583 | #ifdef CONFIG_CIFS_SMB2 |
Steve French | b618f00 | 2015-11-03 09:15:03 -0600 | [diff] [blame] | 3584 | if ((volume_info->persistent == true) && ((ses->server->capabilities & |
| 3585 | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES) == 0)) { |
| 3586 | cifs_dbg(VFS, "persistent handles not supported by server\n"); |
| 3587 | rc = -EOPNOTSUPP; |
| 3588 | goto mount_fail_check; |
| 3589 | } |
Steve French | 592fafe | 2015-11-03 10:08:53 -0600 | [diff] [blame] | 3590 | #endif /* CONFIG_CIFS_SMB2*/ |
| 3591 | |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 3592 | /* search for existing tcon to this server share */ |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3593 | tcon = cifs_get_tcon(ses, volume_info); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 3594 | if (IS_ERR(tcon)) { |
| 3595 | rc = PTR_ERR(tcon); |
| 3596 | tcon = NULL; |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3597 | goto remote_path_check; |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 3598 | } |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3599 | |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3600 | /* tell server which Unix caps we support */ |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 3601 | if (cap_unix(tcon->ses)) { |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3602 | /* reset of caps checks mount to see if unix extensions |
| 3603 | disabled for just this mount */ |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3604 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3605 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
| 3606 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & |
| 3607 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { |
| 3608 | rc = -EACCES; |
| 3609 | goto mount_fail_check; |
| 3610 | } |
| 3611 | } else |
| 3612 | tcon->unix_ext = 0; /* server does not support them */ |
| 3613 | |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3614 | /* do not care if a following call succeed - informational */ |
| 3615 | if (!tcon->ipc && server->ops->qfs_tcon) |
| 3616 | server->ops->qfs_tcon(xid, tcon); |
Steve French | d82c2df | 2008-11-15 00:07:26 +0000 | [diff] [blame] | 3617 | |
Pavel Shilovsky | 24985c5 | 2012-09-18 16:20:28 -0700 | [diff] [blame] | 3618 | cifs_sb->wsize = server->ops->negotiate_wsize(tcon, volume_info); |
| 3619 | cifs_sb->rsize = server->ops->negotiate_rsize(tcon, volume_info); |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3620 | |
Jeff Layton | 66bfaad | 2011-10-19 15:30:35 -0400 | [diff] [blame] | 3621 | /* tune readahead according to rsize */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 3622 | cifs_sb->bdi.ra_pages = cifs_sb->rsize / PAGE_SIZE; |
Jeff Layton | 03ceace | 2010-12-06 21:07:33 -0500 | [diff] [blame] | 3623 | |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3624 | remote_path_check: |
| 3625 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 3626 | /* |
| 3627 | * Perform an unconditional check for whether there are DFS |
| 3628 | * referrals for this path without prefix, to provide support |
| 3629 | * for DFS referrals from w2k8 servers which don't seem to respond |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3630 | * with PATH_NOT_COVERED to requests that include the prefix. |
| 3631 | * Chase the referral if found, otherwise continue normally. |
Steve French | d036f50 | 2009-04-03 03:12:08 +0000 | [diff] [blame] | 3632 | */ |
Igor Mammedov | 5c2503a | 2009-04-21 19:31:05 +0400 | [diff] [blame] | 3633 | if (referral_walks_count == 0) { |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3634 | int refrc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, |
| 3635 | false); |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3636 | if (!refrc) { |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 3637 | referral_walks_count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3638 | goto try_mount_again; |
| 3639 | } |
| 3640 | } |
| 3641 | #endif |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3642 | |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 3643 | /* check if a whole path is not remote */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3644 | if (!rc && tcon) { |
Pavel Shilovsky | 68889f2 | 2012-05-25 14:40:22 +0400 | [diff] [blame] | 3645 | if (!server->ops->is_path_accessible) { |
| 3646 | rc = -ENOSYS; |
| 3647 | goto mount_fail_check; |
| 3648 | } |
Steve French | 6d3ea7e | 2012-11-28 22:34:41 -0600 | [diff] [blame] | 3649 | /* |
| 3650 | * cifs_build_path_to_root works only when we have a valid tcon |
| 3651 | */ |
| 3652 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3653 | if (full_path == NULL) { |
| 3654 | rc = -ENOMEM; |
| 3655 | goto mount_fail_check; |
| 3656 | } |
Pavel Shilovsky | 68889f2 | 2012-05-25 14:40:22 +0400 | [diff] [blame] | 3657 | rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, |
| 3658 | full_path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | if (rc != 0 && rc != -EREMOTE) { |
| 3660 | kfree(full_path); |
| 3661 | goto mount_fail_check; |
| 3662 | } |
Aurelien Aptel | a6b5058 | 2016-05-25 19:59:09 +0200 | [diff] [blame] | 3663 | |
| 3664 | rc = cifs_are_all_path_components_accessible(server, |
| 3665 | xid, tcon, cifs_sb, |
| 3666 | full_path); |
| 3667 | if (rc != 0) { |
| 3668 | cifs_dbg(VFS, "cannot query dirs between root and final path, " |
| 3669 | "enabling CIFS_MOUNT_USE_PREFIX_PATH\n"); |
| 3670 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_USE_PREFIX_PATH; |
| 3671 | rc = 0; |
| 3672 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3673 | kfree(full_path); |
| 3674 | } |
| 3675 | |
| 3676 | /* get referral if needed */ |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3677 | if (rc == -EREMOTE) { |
| 3678 | #ifdef CONFIG_CIFS_DFS_UPCALL |
Igor Mammedov | 5c2503a | 2009-04-21 19:31:05 +0400 | [diff] [blame] | 3679 | if (referral_walks_count > MAX_NESTED_LINKS) { |
| 3680 | /* |
| 3681 | * BB: when we implement proper loop detection, |
| 3682 | * we will remove this check. But now we need it |
| 3683 | * to prevent an indefinite loop if 'DFS tree' is |
| 3684 | * misconfigured (i.e. has loops). |
| 3685 | */ |
| 3686 | rc = -ELOOP; |
| 3687 | goto mount_fail_check; |
| 3688 | } |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3689 | |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3690 | rc = expand_dfs_referral(xid, ses, volume_info, cifs_sb, true); |
Jeff Layton | 7b91e26 | 2009-07-23 15:22:30 -0400 | [diff] [blame] | 3691 | |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3692 | if (!rc) { |
Igor Mammedov | 5c2503a | 2009-04-21 19:31:05 +0400 | [diff] [blame] | 3693 | referral_walks_count++; |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3694 | goto try_mount_again; |
| 3695 | } |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3696 | goto mount_fail_check; |
Steve French | d036f50 | 2009-04-03 03:12:08 +0000 | [diff] [blame] | 3697 | #else /* No DFS support, return error on mount */ |
| 3698 | rc = -EOPNOTSUPP; |
| 3699 | #endif |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3700 | } |
| 3701 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3702 | if (rc) |
| 3703 | goto mount_fail_check; |
| 3704 | |
| 3705 | /* now, hang the tcon off of the superblock */ |
| 3706 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); |
| 3707 | if (tlink == NULL) { |
| 3708 | rc = -ENOMEM; |
| 3709 | goto mount_fail_check; |
| 3710 | } |
| 3711 | |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3712 | tlink->tl_uid = ses->linux_uid; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3713 | tlink->tl_tcon = tcon; |
| 3714 | tlink->tl_time = jiffies; |
| 3715 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); |
| 3716 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); |
| 3717 | |
Jeff Layton | 413e661 | 2010-10-28 13:33:38 -0400 | [diff] [blame] | 3718 | cifs_sb->master_tlink = tlink; |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3719 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 3720 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
| 3721 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 413e661 | 2010-10-28 13:33:38 -0400 | [diff] [blame] | 3722 | |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 3723 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3724 | TLINK_IDLE_EXPIRE); |
| 3725 | |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3726 | mount_fail_check: |
| 3727 | /* on error free sesinfo and tcon struct if needed */ |
| 3728 | if (rc) { |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3729 | /* If find_unc succeeded then rc == 0 so we can not end */ |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3730 | /* up accidentally freeing someone elses tcon struct */ |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3731 | if (tcon) |
| 3732 | cifs_put_tcon(tcon); |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3733 | else if (ses) |
| 3734 | cifs_put_smb_ses(ses); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3735 | else |
Pavel Shilovsky | af4281d | 2012-05-27 20:48:35 +0400 | [diff] [blame] | 3736 | cifs_put_tcp_session(server); |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3737 | bdi_destroy(&cifs_sb->bdi); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3738 | } |
| 3739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3740 | out: |
Pavel Shilovsky | 6d5786a | 2012-06-20 11:21:16 +0400 | [diff] [blame] | 3741 | free_xid(xid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3742 | return rc; |
| 3743 | } |
| 3744 | |
Jeff Layton | 8d1bca3 | 2011-06-11 21:17:10 -0400 | [diff] [blame] | 3745 | /* |
| 3746 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon |
| 3747 | * pointer may be NULL. |
| 3748 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3749 | int |
Pavel Shilovsky | 2e6e02a | 2012-05-25 11:11:39 +0400 | [diff] [blame] | 3750 | CIFSTCon(const unsigned int xid, struct cifs_ses *ses, |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3751 | const char *tree, struct cifs_tcon *tcon, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3752 | const struct nls_table *nls_codepage) |
| 3753 | { |
| 3754 | struct smb_hdr *smb_buffer; |
| 3755 | struct smb_hdr *smb_buffer_response; |
| 3756 | TCONX_REQ *pSMB; |
| 3757 | TCONX_RSP *pSMBr; |
| 3758 | unsigned char *bcc_ptr; |
| 3759 | int rc = 0; |
Jeff Layton | 690c522 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 3760 | int length; |
| 3761 | __u16 bytes_left, count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3762 | |
| 3763 | if (ses == NULL) |
| 3764 | return -EIO; |
| 3765 | |
| 3766 | smb_buffer = cifs_buf_get(); |
Steve French | ca43e3b | 2009-09-01 17:20:50 +0000 | [diff] [blame] | 3767 | if (smb_buffer == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3768 | return -ENOMEM; |
Steve French | ca43e3b | 2009-09-01 17:20:50 +0000 | [diff] [blame] | 3769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3770 | smb_buffer_response = smb_buffer; |
| 3771 | |
| 3772 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, |
| 3773 | NULL /*no tid */ , 4 /*wct */ ); |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 3774 | |
Pavel Shilovsky | 8825736 | 2012-05-23 14:01:59 +0400 | [diff] [blame] | 3775 | smb_buffer->Mid = get_next_mid(ses->server); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3776 | smb_buffer->Uid = ses->Suid; |
| 3777 | pSMB = (TCONX_REQ *) smb_buffer; |
| 3778 | pSMBr = (TCONX_RSP *) smb_buffer_response; |
| 3779 | |
| 3780 | pSMB->AndXCommand = 0xFF; |
| 3781 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3782 | bcc_ptr = &pSMB->Password[0]; |
Jeff Layton | 8d1bca3 | 2011-06-11 21:17:10 -0400 | [diff] [blame] | 3783 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3784 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3785 | *bcc_ptr = 0; /* password is null byte */ |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3786 | bcc_ptr++; /* skip password */ |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3787 | /* already aligned so no need to do it below */ |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3788 | } else { |
Shirish Pargaonkar | 540b2e3 | 2011-01-18 22:33:54 -0600 | [diff] [blame] | 3789 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3790 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
| 3791 | specified as required (when that support is added to |
| 3792 | the vfs in the future) as only NTLM or the much |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3793 | weaker LANMAN (which we do not send by default) is accepted |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3794 | by Samba (not sure whether other servers allow |
| 3795 | NTLMv2 password here) */ |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3796 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
Jeff Layton | 04912d6 | 2010-04-24 07:57:45 -0400 | [diff] [blame] | 3797 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 3798 | (ses->sectype == LANMAN)) |
Shirish Pargaonkar | d3ba50b | 2010-10-27 15:20:36 -0500 | [diff] [blame] | 3799 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3800 | ses->server->sec_mode & |
Jeff Layton | 4e53a3f | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 3801 | SECMODE_PW_ENCRYPT ? true : false, |
| 3802 | bcc_ptr); |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3803 | else |
| 3804 | #endif /* CIFS_WEAK_PW_HASH */ |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 3805 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
Shirish Pargaonkar | 9ef5992 | 2011-10-20 13:21:59 -0500 | [diff] [blame] | 3806 | bcc_ptr, nls_codepage); |
Steve French | f3a31a2 | 2015-03-26 19:23:20 -0500 | [diff] [blame] | 3807 | if (rc) { |
| 3808 | cifs_dbg(FYI, "%s Can't generate NTLM rsp. Error: %d\n", |
| 3809 | __func__, rc); |
| 3810 | cifs_buf_release(smb_buffer); |
| 3811 | return rc; |
| 3812 | } |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3813 | |
Shirish Pargaonkar | 540b2e3 | 2011-01-18 22:33:54 -0600 | [diff] [blame] | 3814 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 3815 | if (ses->capabilities & CAP_UNICODE) { |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3816 | /* must align unicode strings */ |
| 3817 | *bcc_ptr = 0; /* null byte password */ |
| 3818 | bcc_ptr++; |
| 3819 | } |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3820 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3821 | |
Jeff Layton | 38d77c5 | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 3822 | if (ses->server->sign) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3823 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
| 3824 | |
| 3825 | if (ses->capabilities & CAP_STATUS32) { |
| 3826 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; |
| 3827 | } |
| 3828 | if (ses->capabilities & CAP_DFS) { |
| 3829 | smb_buffer->Flags2 |= SMBFLG2_DFS; |
| 3830 | } |
| 3831 | if (ses->capabilities & CAP_UNICODE) { |
| 3832 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; |
| 3833 | length = |
Steve French | acbbb76 | 2012-01-18 22:32:33 -0600 | [diff] [blame] | 3834 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3835 | 6 /* max utf8 char length in bytes */ * |
Steve French | a878fb2 | 2006-05-30 18:04:19 +0000 | [diff] [blame] | 3836 | (/* server len*/ + 256 /* share len */), nls_codepage); |
| 3837 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3838 | bcc_ptr += 2; /* skip trailing null */ |
| 3839 | } else { /* ASCII */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | strcpy(bcc_ptr, tree); |
| 3841 | bcc_ptr += strlen(tree) + 1; |
| 3842 | } |
| 3843 | strcpy(bcc_ptr, "?????"); |
| 3844 | bcc_ptr += strlen("?????"); |
| 3845 | bcc_ptr += 1; |
| 3846 | count = bcc_ptr - &pSMB->Password[0]; |
Steve French | be8e3b0 | 2011-04-29 05:40:20 +0000 | [diff] [blame] | 3847 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
| 3848 | pSMB->hdr.smb_buf_length) + count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3849 | pSMB->ByteCount = cpu_to_le16(count); |
| 3850 | |
Steve French | 133672e | 2007-11-13 22:41:37 +0000 | [diff] [blame] | 3851 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
Jeff Layton | 7749981 | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 3852 | 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3853 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3854 | /* above now done in SendReceive */ |
| 3855 | if ((rc == 0) && (tcon != NULL)) { |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 3856 | bool is_unicode; |
| 3857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3858 | tcon->tidStatus = CifsGood; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3859 | tcon->need_reconnect = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3860 | tcon->tid = smb_buffer_response->Tid; |
| 3861 | bcc_ptr = pByteArea(smb_buffer_response); |
Jeff Layton | 690c522 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 3862 | bytes_left = get_bcc(smb_buffer_response); |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3863 | length = strnlen(bcc_ptr, bytes_left - 2); |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 3864 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
| 3865 | is_unicode = true; |
| 3866 | else |
| 3867 | is_unicode = false; |
| 3868 | |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3869 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3870 | /* skip service field (NB: this field is always ASCII) */ |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 3871 | if (length == 3) { |
| 3872 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && |
| 3873 | (bcc_ptr[2] == 'C')) { |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3874 | cifs_dbg(FYI, "IPC connection\n"); |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 3875 | tcon->ipc = 1; |
| 3876 | } |
| 3877 | } else if (length == 2) { |
| 3878 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { |
| 3879 | /* the most common case */ |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3880 | cifs_dbg(FYI, "disk share connection\n"); |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 3881 | } |
| 3882 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3883 | bcc_ptr += length + 1; |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3884 | bytes_left -= (length + 1); |
Zhao Hongjiang | 46b51d0 | 2013-06-24 01:57:47 -0500 | [diff] [blame] | 3885 | strlcpy(tcon->treeName, tree, sizeof(tcon->treeName)); |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3886 | |
| 3887 | /* mostly informational -- no need to fail on error here */ |
Jeff Layton | 90a98b2 | 2009-07-20 13:40:52 -0400 | [diff] [blame] | 3888 | kfree(tcon->nativeFileSystem); |
Steve French | acbbb76 | 2012-01-18 22:32:33 -0600 | [diff] [blame] | 3889 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 3890 | bytes_left, is_unicode, |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3891 | nls_codepage); |
| 3892 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3893 | cifs_dbg(FYI, "nativeFileSystem=%s\n", tcon->nativeFileSystem); |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3894 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 3895 | if ((smb_buffer_response->WordCount == 3) || |
Steve French | 1a4e15a | 2006-10-12 21:33:51 +0000 | [diff] [blame] | 3896 | (smb_buffer_response->WordCount == 7)) |
| 3897 | /* field is in same location */ |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 3898 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
| 3899 | else |
| 3900 | tcon->Flags = 0; |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3901 | cifs_dbg(FYI, "Tcon flags: 0x%x\n", tcon->Flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3902 | } else if ((rc == 0) && tcon == NULL) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3903 | /* all we need to save for IPC$ connection */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3904 | ses->ipc_tid = smb_buffer_response->Tid; |
| 3905 | } |
| 3906 | |
Mariusz Kozlowski | a8a11d3 | 2007-10-03 16:41:24 +0000 | [diff] [blame] | 3907 | cifs_buf_release(smb_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3908 | return rc; |
| 3909 | } |
| 3910 | |
Al Viro | 2e32cf5 | 2013-10-03 12:53:37 -0400 | [diff] [blame] | 3911 | static void delayed_free(struct rcu_head *p) |
| 3912 | { |
| 3913 | struct cifs_sb_info *sbi = container_of(p, struct cifs_sb_info, rcu); |
| 3914 | unload_nls(sbi->local_nls); |
| 3915 | kfree(sbi); |
| 3916 | } |
| 3917 | |
Al Viro | 2a9b995 | 2011-06-17 09:27:16 -0400 | [diff] [blame] | 3918 | void |
| 3919 | cifs_umount(struct cifs_sb_info *cifs_sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3920 | { |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3921 | struct rb_root *root = &cifs_sb->tlink_tree; |
| 3922 | struct rb_node *node; |
| 3923 | struct tcon_link *tlink; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3924 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3925 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
| 3926 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3927 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 3928 | while ((node = rb_first(root))) { |
| 3929 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); |
| 3930 | cifs_get_tlink(tlink); |
| 3931 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); |
| 3932 | rb_erase(node, root); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3933 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3934 | spin_unlock(&cifs_sb->tlink_tree_lock); |
| 3935 | cifs_put_tlink(tlink); |
| 3936 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 3937 | } |
| 3938 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3939 | |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3940 | bdi_destroy(&cifs_sb->bdi); |
Al Viro | d757d71 | 2011-06-17 09:42:43 -0400 | [diff] [blame] | 3941 | kfree(cifs_sb->mountdata); |
Aurelien Aptel | a6b5058 | 2016-05-25 19:59:09 +0200 | [diff] [blame] | 3942 | kfree(cifs_sb->prepath); |
Al Viro | 2e32cf5 | 2013-10-03 12:53:37 -0400 | [diff] [blame] | 3943 | call_rcu(&cifs_sb->rcu, delayed_free); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3944 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3945 | |
Pavel Shilovsky | 286170a | 2012-05-25 10:43:58 +0400 | [diff] [blame] | 3946 | int |
| 3947 | cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3948 | { |
| 3949 | int rc = 0; |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3950 | struct TCP_Server_Info *server = ses->server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3951 | |
Pavel Shilovsky | 286170a | 2012-05-25 10:43:58 +0400 | [diff] [blame] | 3952 | if (!server->ops->need_neg || !server->ops->negotiate) |
| 3953 | return -ENOSYS; |
| 3954 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3955 | /* only send once per connect */ |
Pavel Shilovsky | 286170a | 2012-05-25 10:43:58 +0400 | [diff] [blame] | 3956 | if (!server->ops->need_neg(server)) |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3957 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3958 | |
Pavel Shilovsky | 4527578 | 2012-05-17 17:53:29 +0400 | [diff] [blame] | 3959 | set_credits(server, 1); |
Pavel Shilovsky | 286170a | 2012-05-25 10:43:58 +0400 | [diff] [blame] | 3960 | |
| 3961 | rc = server->ops->negotiate(xid, ses); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3962 | if (rc == 0) { |
| 3963 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 7fdbaa1 | 2011-06-10 16:14:57 -0400 | [diff] [blame] | 3964 | if (server->tcpStatus == CifsNeedNegotiate) |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3965 | server->tcpStatus = CifsGood; |
| 3966 | else |
| 3967 | rc = -EHOSTDOWN; |
| 3968 | spin_unlock(&GlobalMid_Lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3969 | } |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 3970 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3971 | return rc; |
| 3972 | } |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 3973 | |
Pavel Shilovsky | 58c45c5 | 2012-05-25 10:54:49 +0400 | [diff] [blame] | 3974 | int |
| 3975 | cifs_setup_session(const unsigned int xid, struct cifs_ses *ses, |
| 3976 | struct nls_table *nls_info) |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3977 | { |
Pavel Shilovsky | 58c45c5 | 2012-05-25 10:54:49 +0400 | [diff] [blame] | 3978 | int rc = -ENOSYS; |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3979 | struct TCP_Server_Info *server = ses->server; |
| 3980 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 3981 | ses->capabilities = server->capabilities; |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 3982 | if (linuxExtEnabled == 0) |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 3983 | ses->capabilities &= (~server->vals->cap_unix); |
Steve French | 20418ac | 2009-04-30 16:13:32 +0000 | [diff] [blame] | 3984 | |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3985 | cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n", |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3986 | server->sec_mode, server->capabilities, server->timeAdj); |
Jeff Layton | cb7691b | 2008-08-18 15:41:05 -0400 | [diff] [blame] | 3987 | |
Pavel Shilovsky | 58c45c5 | 2012-05-25 10:54:49 +0400 | [diff] [blame] | 3988 | if (server->ops->sess_setup) |
| 3989 | rc = server->ops->sess_setup(xid, ses, nls_info); |
| 3990 | |
Shirish Pargaonkar | d4e63bd | 2013-08-29 08:35:09 -0500 | [diff] [blame] | 3991 | if (rc) |
Joe Perches | f96637b | 2013-05-04 22:12:25 -0500 | [diff] [blame] | 3992 | cifs_dbg(VFS, "Send error in SessSetup = %d\n", rc); |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 3993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3994 | return rc; |
| 3995 | } |
| 3996 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 3997 | static int |
| 3998 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) |
| 3999 | { |
Jeff Layton | 3f61822 | 2013-06-12 19:52:14 -0500 | [diff] [blame] | 4000 | vol->sectype = ses->sectype; |
| 4001 | |
| 4002 | /* krb5 is special, since we don't need username or pw */ |
| 4003 | if (vol->sectype == Kerberos) |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 4004 | return 0; |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 4005 | |
| 4006 | return cifs_set_cifscreds(vol, ses); |
| 4007 | } |
| 4008 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4009 | static struct cifs_tcon * |
Eric W. Biederman | 6d4a083 | 2013-02-06 01:48:56 -0800 | [diff] [blame] | 4010 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid) |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4011 | { |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 4012 | int rc; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4013 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
| 4014 | struct cifs_ses *ses; |
| 4015 | struct cifs_tcon *tcon = NULL; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4016 | struct smb_vol *vol_info; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4017 | |
| 4018 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); |
Dan Carpenter | 803ab97 | 2012-01-24 11:39:22 +0300 | [diff] [blame] | 4019 | if (vol_info == NULL) |
| 4020 | return ERR_PTR(-ENOMEM); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4021 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4022 | vol_info->local_nls = cifs_sb->local_nls; |
| 4023 | vol_info->linux_uid = fsuid; |
| 4024 | vol_info->cred_uid = fsuid; |
| 4025 | vol_info->UNC = master_tcon->treeName; |
| 4026 | vol_info->retry = master_tcon->retry; |
| 4027 | vol_info->nocase = master_tcon->nocase; |
| 4028 | vol_info->local_lease = master_tcon->local_lease; |
| 4029 | vol_info->no_linux_ext = !master_tcon->unix_ext; |
Jeff Layton | 28e11bd | 2013-05-26 07:01:00 -0400 | [diff] [blame] | 4030 | vol_info->sectype = master_tcon->ses->sectype; |
| 4031 | vol_info->sign = master_tcon->ses->sign; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4032 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 4033 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
| 4034 | if (rc) { |
| 4035 | tcon = ERR_PTR(rc); |
| 4036 | goto out; |
| 4037 | } |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4038 | |
| 4039 | /* get a reference for the same TCP session */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 4040 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4041 | ++master_tcon->ses->server->srv_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 4042 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4043 | |
| 4044 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); |
| 4045 | if (IS_ERR(ses)) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4046 | tcon = (struct cifs_tcon *)ses; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4047 | cifs_put_tcp_session(master_tcon->ses->server); |
| 4048 | goto out; |
| 4049 | } |
| 4050 | |
| 4051 | tcon = cifs_get_tcon(ses, vol_info); |
| 4052 | if (IS_ERR(tcon)) { |
| 4053 | cifs_put_smb_ses(ses); |
| 4054 | goto out; |
| 4055 | } |
| 4056 | |
Pavel Shilovsky | 29e20f9 | 2012-07-13 13:58:14 +0400 | [diff] [blame] | 4057 | if (cap_unix(ses)) |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4058 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
| 4059 | out: |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 4060 | kfree(vol_info->username); |
| 4061 | kfree(vol_info->password); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4062 | kfree(vol_info); |
| 4063 | |
| 4064 | return tcon; |
| 4065 | } |
| 4066 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4067 | struct cifs_tcon * |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4068 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
| 4069 | { |
| 4070 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); |
| 4071 | } |
| 4072 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4073 | /* find and return a tlink with given uid */ |
| 4074 | static struct tcon_link * |
Eric W. Biederman | 6d4a083 | 2013-02-06 01:48:56 -0800 | [diff] [blame] | 4075 | tlink_rb_search(struct rb_root *root, kuid_t uid) |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4076 | { |
| 4077 | struct rb_node *node = root->rb_node; |
| 4078 | struct tcon_link *tlink; |
| 4079 | |
| 4080 | while (node) { |
| 4081 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); |
| 4082 | |
Eric W. Biederman | 6d4a083 | 2013-02-06 01:48:56 -0800 | [diff] [blame] | 4083 | if (uid_gt(tlink->tl_uid, uid)) |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4084 | node = node->rb_left; |
Eric W. Biederman | 6d4a083 | 2013-02-06 01:48:56 -0800 | [diff] [blame] | 4085 | else if (uid_lt(tlink->tl_uid, uid)) |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4086 | node = node->rb_right; |
| 4087 | else |
| 4088 | return tlink; |
| 4089 | } |
| 4090 | return NULL; |
| 4091 | } |
| 4092 | |
| 4093 | /* insert a tcon_link into the tree */ |
| 4094 | static void |
| 4095 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) |
| 4096 | { |
| 4097 | struct rb_node **new = &(root->rb_node), *parent = NULL; |
| 4098 | struct tcon_link *tlink; |
| 4099 | |
| 4100 | while (*new) { |
| 4101 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); |
| 4102 | parent = *new; |
| 4103 | |
Eric W. Biederman | 6d4a083 | 2013-02-06 01:48:56 -0800 | [diff] [blame] | 4104 | if (uid_gt(tlink->tl_uid, new_tlink->tl_uid)) |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4105 | new = &((*new)->rb_left); |
| 4106 | else |
| 4107 | new = &((*new)->rb_right); |
| 4108 | } |
| 4109 | |
| 4110 | rb_link_node(&new_tlink->tl_rbnode, parent, new); |
| 4111 | rb_insert_color(&new_tlink->tl_rbnode, root); |
| 4112 | } |
| 4113 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4114 | /* |
| 4115 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the |
| 4116 | * current task. |
| 4117 | * |
| 4118 | * If the superblock doesn't refer to a multiuser mount, then just return |
| 4119 | * the master tcon for the mount. |
| 4120 | * |
Suresh Jayaraman | 6ef933a | 2010-11-03 10:53:49 +0530 | [diff] [blame] | 4121 | * First, search the rbtree for an existing tcon for this fsuid. If one |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4122 | * exists, then check to see if it's pending construction. If it is then wait |
| 4123 | * for construction to complete. Once it's no longer pending, check to see if |
| 4124 | * it failed and either return an error or retry construction, depending on |
| 4125 | * the timeout. |
| 4126 | * |
| 4127 | * If one doesn't exist then insert a new tcon_link struct into the tree and |
| 4128 | * try to construct a new one. |
| 4129 | */ |
| 4130 | struct tcon_link * |
| 4131 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) |
| 4132 | { |
| 4133 | int ret; |
Eric W. Biederman | 6d4a083 | 2013-02-06 01:48:56 -0800 | [diff] [blame] | 4134 | kuid_t fsuid = current_fsuid(); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4135 | struct tcon_link *tlink, *newtlink; |
| 4136 | |
| 4137 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) |
| 4138 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); |
| 4139 | |
| 4140 | spin_lock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4141 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4142 | if (tlink) |
| 4143 | cifs_get_tlink(tlink); |
| 4144 | spin_unlock(&cifs_sb->tlink_tree_lock); |
| 4145 | |
| 4146 | if (tlink == NULL) { |
| 4147 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); |
| 4148 | if (newtlink == NULL) |
| 4149 | return ERR_PTR(-ENOMEM); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4150 | newtlink->tl_uid = fsuid; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4151 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
| 4152 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); |
| 4153 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); |
| 4154 | cifs_get_tlink(newtlink); |
| 4155 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4156 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4157 | /* was one inserted after previous search? */ |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4158 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4159 | if (tlink) { |
| 4160 | cifs_get_tlink(tlink); |
| 4161 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4162 | kfree(newtlink); |
| 4163 | goto wait_for_construction; |
| 4164 | } |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4165 | tlink = newtlink; |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4166 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
| 4167 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4168 | } else { |
| 4169 | wait_for_construction: |
| 4170 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4171 | TASK_INTERRUPTIBLE); |
| 4172 | if (ret) { |
| 4173 | cifs_put_tlink(tlink); |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 4174 | return ERR_PTR(-ERESTARTSYS); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4175 | } |
| 4176 | |
| 4177 | /* if it's good, return it */ |
| 4178 | if (!IS_ERR(tlink->tl_tcon)) |
| 4179 | return tlink; |
| 4180 | |
| 4181 | /* return error if we tried this already recently */ |
| 4182 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { |
| 4183 | cifs_put_tlink(tlink); |
| 4184 | return ERR_PTR(-EACCES); |
| 4185 | } |
| 4186 | |
| 4187 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) |
| 4188 | goto wait_for_construction; |
| 4189 | } |
| 4190 | |
| 4191 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); |
| 4192 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); |
| 4193 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); |
| 4194 | |
| 4195 | if (IS_ERR(tlink->tl_tcon)) { |
| 4196 | cifs_put_tlink(tlink); |
| 4197 | return ERR_PTR(-EACCES); |
| 4198 | } |
| 4199 | |
| 4200 | return tlink; |
| 4201 | } |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4202 | |
| 4203 | /* |
| 4204 | * periodic workqueue job that scans tcon_tree for a superblock and closes |
| 4205 | * out tcons. |
| 4206 | */ |
| 4207 | static void |
| 4208 | cifs_prune_tlinks(struct work_struct *work) |
| 4209 | { |
| 4210 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, |
| 4211 | prune_tlinks.work); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4212 | struct rb_root *root = &cifs_sb->tlink_tree; |
| 4213 | struct rb_node *node = rb_first(root); |
| 4214 | struct rb_node *tmp; |
| 4215 | struct tcon_link *tlink; |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4216 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4217 | /* |
| 4218 | * Because we drop the spinlock in the loop in order to put the tlink |
| 4219 | * it's not guarded against removal of links from the tree. The only |
| 4220 | * places that remove entries from the tree are this function and |
| 4221 | * umounts. Because this function is non-reentrant and is canceled |
| 4222 | * before umount can proceed, this is safe. |
| 4223 | */ |
| 4224 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4225 | node = rb_first(root); |
| 4226 | while (node != NULL) { |
| 4227 | tmp = node; |
| 4228 | node = rb_next(tmp); |
| 4229 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); |
| 4230 | |
| 4231 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || |
| 4232 | atomic_read(&tlink->tl_count) != 0 || |
| 4233 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) |
| 4234 | continue; |
| 4235 | |
| 4236 | cifs_get_tlink(tlink); |
| 4237 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); |
| 4238 | rb_erase(tmp, root); |
| 4239 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4240 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4241 | cifs_put_tlink(tlink); |
| 4242 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4243 | } |
| 4244 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4245 | |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 4246 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4247 | TLINK_IDLE_EXPIRE); |
| 4248 | } |