Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/connect.c |
| 3 | * |
Steve French | d185cda | 2009-04-30 17:45:10 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2009 |
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 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 59 | /* SMB echo "timeout" -- FIXME: tunable? */ |
| 60 | #define SMB_ECHO_INTERVAL (60 * HZ) |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | extern mempool_t *cifs_req_poolp; |
| 63 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 64 | /* FIXME: should these be tunable? */ |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 65 | #define TLINK_ERROR_EXPIRE (1 * HZ) |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 66 | #define TLINK_IDLE_EXPIRE (600 * HZ) |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 67 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 68 | enum { |
| 69 | |
| 70 | /* Mount options that take no arguments */ |
| 71 | Opt_user_xattr, Opt_nouser_xattr, |
| 72 | Opt_forceuid, Opt_noforceuid, |
| 73 | Opt_noblocksend, Opt_noautotune, |
| 74 | Opt_hard, Opt_soft, Opt_perm, Opt_noperm, |
| 75 | Opt_mapchars, Opt_nomapchars, Opt_sfu, |
| 76 | Opt_nosfu, Opt_nodfs, Opt_posixpaths, |
| 77 | Opt_noposixpaths, Opt_nounix, |
| 78 | Opt_nocase, |
| 79 | Opt_brl, Opt_nobrl, |
| 80 | Opt_forcemandatorylock, Opt_setuids, |
| 81 | Opt_nosetuids, Opt_dynperm, Opt_nodynperm, |
| 82 | Opt_nohard, Opt_nosoft, |
| 83 | Opt_nointr, Opt_intr, |
| 84 | Opt_nostrictsync, Opt_strictsync, |
| 85 | Opt_serverino, Opt_noserverino, |
| 86 | Opt_rwpidforward, Opt_cifsacl, Opt_nocifsacl, |
| 87 | Opt_acl, Opt_noacl, Opt_locallease, |
| 88 | Opt_sign, Opt_seal, Opt_direct, |
| 89 | Opt_strictcache, Opt_noac, |
| 90 | Opt_fsc, Opt_mfsymlinks, |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 91 | Opt_multiuser, Opt_sloppy, |
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, |
| 98 | |
| 99 | /* Mount options which take string value */ |
| 100 | Opt_user, Opt_pass, Opt_ip, |
| 101 | Opt_unc, Opt_domain, |
| 102 | Opt_srcaddr, Opt_prefixpath, |
| 103 | Opt_iocharset, Opt_sockopt, |
| 104 | Opt_netbiosname, Opt_servern, |
| 105 | Opt_ver, Opt_sec, |
| 106 | |
| 107 | /* Mount options to be ignored */ |
| 108 | Opt_ignore, |
| 109 | |
| 110 | /* Options which could be blank */ |
| 111 | Opt_blank_pass, |
| 112 | |
| 113 | Opt_err |
| 114 | }; |
| 115 | |
| 116 | static const match_table_t cifs_mount_option_tokens = { |
| 117 | |
| 118 | { Opt_user_xattr, "user_xattr" }, |
| 119 | { Opt_nouser_xattr, "nouser_xattr" }, |
| 120 | { Opt_forceuid, "forceuid" }, |
| 121 | { Opt_noforceuid, "noforceuid" }, |
| 122 | { Opt_noblocksend, "noblocksend" }, |
| 123 | { Opt_noautotune, "noautotune" }, |
| 124 | { Opt_hard, "hard" }, |
| 125 | { Opt_soft, "soft" }, |
| 126 | { Opt_perm, "perm" }, |
| 127 | { Opt_noperm, "noperm" }, |
| 128 | { Opt_mapchars, "mapchars" }, |
| 129 | { Opt_nomapchars, "nomapchars" }, |
| 130 | { Opt_sfu, "sfu" }, |
| 131 | { Opt_nosfu, "nosfu" }, |
| 132 | { Opt_nodfs, "nodfs" }, |
| 133 | { Opt_posixpaths, "posixpaths" }, |
| 134 | { Opt_noposixpaths, "noposixpaths" }, |
| 135 | { Opt_nounix, "nounix" }, |
| 136 | { Opt_nounix, "nolinux" }, |
| 137 | { Opt_nocase, "nocase" }, |
| 138 | { Opt_nocase, "ignorecase" }, |
| 139 | { Opt_brl, "brl" }, |
| 140 | { Opt_nobrl, "nobrl" }, |
| 141 | { Opt_nobrl, "nolock" }, |
| 142 | { Opt_forcemandatorylock, "forcemandatorylock" }, |
Pavel Shilovsky | 5cfdddc | 2012-03-27 20:51:15 +0400 | [diff] [blame^] | 143 | { Opt_forcemandatorylock, "forcemand" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 144 | { Opt_setuids, "setuids" }, |
| 145 | { Opt_nosetuids, "nosetuids" }, |
| 146 | { Opt_dynperm, "dynperm" }, |
| 147 | { Opt_nodynperm, "nodynperm" }, |
| 148 | { Opt_nohard, "nohard" }, |
| 149 | { Opt_nosoft, "nosoft" }, |
| 150 | { Opt_nointr, "nointr" }, |
| 151 | { Opt_intr, "intr" }, |
| 152 | { Opt_nostrictsync, "nostrictsync" }, |
| 153 | { Opt_strictsync, "strictsync" }, |
| 154 | { Opt_serverino, "serverino" }, |
| 155 | { Opt_noserverino, "noserverino" }, |
| 156 | { Opt_rwpidforward, "rwpidforward" }, |
| 157 | { Opt_cifsacl, "cifsacl" }, |
| 158 | { Opt_nocifsacl, "nocifsacl" }, |
| 159 | { Opt_acl, "acl" }, |
| 160 | { Opt_noacl, "noacl" }, |
| 161 | { Opt_locallease, "locallease" }, |
| 162 | { Opt_sign, "sign" }, |
| 163 | { Opt_seal, "seal" }, |
| 164 | { Opt_direct, "direct" }, |
| 165 | { Opt_direct, "forceddirectio" }, |
| 166 | { Opt_strictcache, "strictcache" }, |
| 167 | { Opt_noac, "noac" }, |
| 168 | { Opt_fsc, "fsc" }, |
| 169 | { Opt_mfsymlinks, "mfsymlinks" }, |
| 170 | { Opt_multiuser, "multiuser" }, |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 171 | { Opt_sloppy, "sloppy" }, |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 172 | |
| 173 | { Opt_backupuid, "backupuid=%s" }, |
| 174 | { Opt_backupgid, "backupgid=%s" }, |
| 175 | { Opt_uid, "uid=%s" }, |
| 176 | { Opt_cruid, "cruid=%s" }, |
| 177 | { Opt_gid, "gid=%s" }, |
| 178 | { Opt_file_mode, "file_mode=%s" }, |
| 179 | { Opt_dirmode, "dirmode=%s" }, |
| 180 | { Opt_dirmode, "dir_mode=%s" }, |
| 181 | { Opt_port, "port=%s" }, |
| 182 | { Opt_rsize, "rsize=%s" }, |
| 183 | { Opt_wsize, "wsize=%s" }, |
| 184 | { Opt_actimeo, "actimeo=%s" }, |
| 185 | |
| 186 | { Opt_user, "user=%s" }, |
| 187 | { Opt_user, "username=%s" }, |
| 188 | { Opt_blank_pass, "pass=" }, |
| 189 | { Opt_pass, "pass=%s" }, |
| 190 | { Opt_pass, "password=%s" }, |
| 191 | { Opt_ip, "ip=%s" }, |
| 192 | { Opt_ip, "addr=%s" }, |
| 193 | { Opt_unc, "unc=%s" }, |
| 194 | { Opt_unc, "target=%s" }, |
| 195 | { Opt_unc, "path=%s" }, |
| 196 | { Opt_domain, "dom=%s" }, |
| 197 | { Opt_domain, "domain=%s" }, |
| 198 | { Opt_domain, "workgroup=%s" }, |
| 199 | { Opt_srcaddr, "srcaddr=%s" }, |
| 200 | { Opt_prefixpath, "prefixpath=%s" }, |
| 201 | { Opt_iocharset, "iocharset=%s" }, |
| 202 | { Opt_sockopt, "sockopt=%s" }, |
| 203 | { Opt_netbiosname, "netbiosname=%s" }, |
| 204 | { Opt_servern, "servern=%s" }, |
| 205 | { Opt_ver, "ver=%s" }, |
| 206 | { Opt_ver, "vers=%s" }, |
| 207 | { Opt_ver, "version=%s" }, |
| 208 | { Opt_sec, "sec=%s" }, |
| 209 | |
| 210 | { Opt_ignore, "cred" }, |
| 211 | { Opt_ignore, "credentials" }, |
| 212 | { Opt_ignore, "guest" }, |
| 213 | { Opt_ignore, "rw" }, |
| 214 | { Opt_ignore, "ro" }, |
| 215 | { Opt_ignore, "suid" }, |
| 216 | { Opt_ignore, "nosuid" }, |
| 217 | { Opt_ignore, "exec" }, |
| 218 | { Opt_ignore, "noexec" }, |
| 219 | { Opt_ignore, "nodev" }, |
| 220 | { Opt_ignore, "noauto" }, |
| 221 | { Opt_ignore, "dev" }, |
| 222 | { Opt_ignore, "mand" }, |
| 223 | { Opt_ignore, "nomand" }, |
| 224 | { Opt_ignore, "_netdev" }, |
| 225 | |
| 226 | { Opt_err, NULL } |
| 227 | }; |
| 228 | |
| 229 | enum { |
| 230 | Opt_sec_krb5, Opt_sec_krb5i, Opt_sec_krb5p, |
| 231 | Opt_sec_ntlmsspi, Opt_sec_ntlmssp, |
| 232 | Opt_ntlm, Opt_sec_ntlmi, Opt_sec_ntlmv2i, |
| 233 | Opt_sec_nontlm, Opt_sec_lanman, |
| 234 | Opt_sec_none, |
| 235 | |
| 236 | Opt_sec_err |
| 237 | }; |
| 238 | |
| 239 | static const match_table_t cifs_secflavor_tokens = { |
| 240 | { Opt_sec_krb5, "krb5" }, |
| 241 | { Opt_sec_krb5i, "krb5i" }, |
| 242 | { Opt_sec_krb5p, "krb5p" }, |
| 243 | { Opt_sec_ntlmsspi, "ntlmsspi" }, |
| 244 | { Opt_sec_ntlmssp, "ntlmssp" }, |
| 245 | { Opt_ntlm, "ntlm" }, |
| 246 | { Opt_sec_ntlmi, "ntlmi" }, |
| 247 | { Opt_sec_ntlmv2i, "ntlmv2i" }, |
| 248 | { Opt_sec_nontlm, "nontlm" }, |
| 249 | { Opt_sec_lanman, "lanman" }, |
| 250 | { Opt_sec_none, "none" }, |
| 251 | |
| 252 | { Opt_sec_err, NULL } |
| 253 | }; |
| 254 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 255 | static int ip_connect(struct TCP_Server_Info *server); |
| 256 | static int generic_ip_connect(struct TCP_Server_Info *server); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 257 | 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] | 258 | static void cifs_prune_tlinks(struct work_struct *work); |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 259 | static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
| 260 | const char *devname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
Jeff Layton | d5c5605 | 2008-12-01 18:42:33 -0500 | [diff] [blame] | 262 | /* |
| 263 | * cifs tcp session reconnection |
| 264 | * |
| 265 | * mark tcp session as reconnecting so temporarily locked |
| 266 | * mark all smb sessions as reconnecting for tcp session |
| 267 | * reconnect tcp session |
| 268 | * wake up waiters on reconnection? - (not needed currently) |
| 269 | */ |
Steve French | 2cd646a | 2006-09-28 19:43:08 +0000 | [diff] [blame] | 270 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | cifs_reconnect(struct TCP_Server_Info *server) |
| 272 | { |
| 273 | int rc = 0; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 274 | struct list_head *tmp, *tmp2; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 275 | struct cifs_ses *ses; |
| 276 | struct cifs_tcon *tcon; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 277 | struct mid_q_entry *mid_entry; |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 278 | struct list_head retry_list; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 469ee61 | 2008-10-16 18:46:39 +0000 | [diff] [blame] | 281 | if (server->tcpStatus == CifsExiting) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 282 | /* the demux thread will exit normally |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | next time through the loop */ |
| 284 | spin_unlock(&GlobalMid_Lock); |
| 285 | return rc; |
| 286 | } else |
| 287 | server->tcpStatus = CifsNeedReconnect; |
| 288 | spin_unlock(&GlobalMid_Lock); |
| 289 | server->maxBuf = 0; |
| 290 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 291 | cFYI(1, "Reconnecting tcp session"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
| 293 | /* before reconnecting the tcp session, mark the smb session (uid) |
| 294 | and the tid bad so they are not used until reconnected */ |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 295 | cFYI(1, "%s: marking sessions and tcons for reconnect", __func__); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 296 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 297 | list_for_each(tmp, &server->smb_ses_list) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 298 | ses = list_entry(tmp, struct cifs_ses, smb_ses_list); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 299 | ses->need_reconnect = true; |
| 300 | ses->ipc_tid = 0; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 301 | list_for_each(tmp2, &ses->tcon_list) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 302 | tcon = list_entry(tmp2, struct cifs_tcon, tcon_list); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 303 | tcon->need_reconnect = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 306 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | /* do not want to be sending data on a socket we are freeing */ |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 309 | cFYI(1, "%s: tearing down socket", __func__); |
Jeff Layton | 72ca545 | 2008-12-01 07:09:36 -0500 | [diff] [blame] | 310 | mutex_lock(&server->srv_mutex); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 311 | if (server->ssocket) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 312 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
| 313 | server->ssocket->flags); |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 314 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 315 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
Steve French | 467a8f8 | 2007-06-27 22:41:32 +0000 | [diff] [blame] | 316 | server->ssocket->state, |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 317 | server->ssocket->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | sock_release(server->ssocket); |
| 319 | server->ssocket = NULL; |
| 320 | } |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 321 | server->sequence_number = 0; |
| 322 | server->session_estab = false; |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 323 | kfree(server->session_key.response); |
| 324 | server->session_key.response = NULL; |
| 325 | server->session_key.len = 0; |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 326 | server->lstrp = jiffies; |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 327 | mutex_unlock(&server->srv_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 329 | /* mark submitted MIDs for retry and issue callback */ |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 330 | INIT_LIST_HEAD(&retry_list); |
| 331 | cFYI(1, "%s: moving mids to private list", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 333 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
| 334 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 335 | if (mid_entry->mid_state == MID_REQUEST_SUBMITTED) |
| 336 | mid_entry->mid_state = MID_RETRY_NEEDED; |
Jeff Layton | 3c1105d | 2011-05-22 07:09:13 -0400 | [diff] [blame] | 337 | list_move(&mid_entry->qhead, &retry_list); |
| 338 | } |
| 339 | spin_unlock(&GlobalMid_Lock); |
| 340 | |
| 341 | cFYI(1, "%s: issuing mid callbacks", __func__); |
| 342 | list_for_each_safe(tmp, tmp2, &retry_list) { |
| 343 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 344 | list_del_init(&mid_entry->qhead); |
| 345 | mid_entry->callback(mid_entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
Jeff Layton | 7fdbaa1 | 2011-06-10 16:14:57 -0400 | [diff] [blame] | 348 | do { |
Steve French | 6c3d890 | 2006-07-31 22:46:20 +0000 | [diff] [blame] | 349 | try_to_freeze(); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 350 | |
| 351 | /* we should try only the port we connected to before */ |
| 352 | rc = generic_ip_connect(server); |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 353 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 354 | cFYI(1, "reconnect error %d", rc); |
Steve French | 0cb766a | 2005-04-28 22:41:11 -0700 | [diff] [blame] | 355 | msleep(3000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | } else { |
| 357 | atomic_inc(&tcpSesReconnectCount); |
| 358 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 469ee61 | 2008-10-16 18:46:39 +0000 | [diff] [blame] | 359 | if (server->tcpStatus != CifsExiting) |
Steve French | fd88ce9 | 2011-04-12 01:01:14 +0000 | [diff] [blame] | 360 | server->tcpStatus = CifsNeedNegotiate; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 361 | spin_unlock(&GlobalMid_Lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | } |
Jeff Layton | 7fdbaa1 | 2011-06-10 16:14:57 -0400 | [diff] [blame] | 363 | } while (server->tcpStatus == CifsNeedReconnect); |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 364 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | return rc; |
| 366 | } |
| 367 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 368 | /* |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 369 | return codes: |
| 370 | 0 not a transact2, or all data present |
| 371 | >0 transact2 with that much data missing |
| 372 | -EINVAL = invalid transact2 |
| 373 | |
| 374 | */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 375 | static int check2ndT2(char *buf) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 376 | { |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 377 | struct smb_hdr *pSMB = (struct smb_hdr *)buf; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 378 | struct smb_t2_rsp *pSMBt; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 379 | int remaining; |
Jeff Layton | 26ec254 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 380 | __u16 total_data_size, data_in_this_rsp; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 381 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 382 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 383 | return 0; |
| 384 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 385 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
| 386 | /* check for parm and data offset going beyond end of smb */ |
| 387 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 388 | cFYI(1, "invalid transact2 word count"); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 389 | return -EINVAL; |
| 390 | } |
| 391 | |
| 392 | pSMBt = (struct smb_t2_rsp *)pSMB; |
| 393 | |
Jeff Layton | 26ec254 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 394 | total_data_size = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
| 395 | data_in_this_rsp = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 396 | |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 397 | if (total_data_size == data_in_this_rsp) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 398 | return 0; |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 399 | else if (total_data_size < data_in_this_rsp) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 400 | cFYI(1, "total data %d smaller than data in frame %d", |
| 401 | total_data_size, data_in_this_rsp); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 402 | return -EINVAL; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 403 | } |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 404 | |
| 405 | remaining = total_data_size - data_in_this_rsp; |
| 406 | |
| 407 | cFYI(1, "missing %d bytes from transact2, check next response", |
| 408 | remaining); |
Jeff Layton | c974bef | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 409 | if (total_data_size > CIFSMaxBufSize) { |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 410 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
Jeff Layton | c974bef | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 411 | total_data_size, CIFSMaxBufSize); |
Jeff Layton | c0c7b90 | 2011-03-31 17:32:54 -0400 | [diff] [blame] | 412 | return -EINVAL; |
| 413 | } |
| 414 | return remaining; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 415 | } |
| 416 | |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 417 | static int coalesce_t2(char *second_buf, struct smb_hdr *target_hdr) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 418 | { |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 419 | struct smb_t2_rsp *pSMBs = (struct smb_t2_rsp *)second_buf; |
| 420 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)target_hdr; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 421 | char *data_area_of_tgt; |
| 422 | char *data_area_of_src; |
Jeff Layton | 26ec254 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 423 | int remaining; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 424 | unsigned int byte_count, total_in_tgt; |
| 425 | __u16 tgt_total_cnt, src_total_cnt, total_in_src; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 426 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 427 | src_total_cnt = get_unaligned_le16(&pSMBs->t2_rsp.TotalDataCount); |
| 428 | tgt_total_cnt = get_unaligned_le16(&pSMBt->t2_rsp.TotalDataCount); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 429 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 430 | if (tgt_total_cnt != src_total_cnt) |
| 431 | cFYI(1, "total data count of primary and secondary t2 differ " |
| 432 | "source=%hu target=%hu", src_total_cnt, tgt_total_cnt); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 433 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 434 | total_in_tgt = get_unaligned_le16(&pSMBt->t2_rsp.DataCount); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 435 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 436 | remaining = tgt_total_cnt - total_in_tgt; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 437 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 438 | if (remaining < 0) { |
| 439 | cFYI(1, "Server sent too much data. tgt_total_cnt=%hu " |
| 440 | "total_in_tgt=%hu", tgt_total_cnt, total_in_tgt); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 441 | return -EPROTO; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 442 | } |
| 443 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 444 | if (remaining == 0) { |
| 445 | /* nothing to do, ignore */ |
| 446 | cFYI(1, "no more data remains"); |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | total_in_src = get_unaligned_le16(&pSMBs->t2_rsp.DataCount); |
| 451 | if (remaining < total_in_src) |
| 452 | cFYI(1, "transact2 2nd response contains too much data"); |
| 453 | |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 454 | /* find end of first SMB data area */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 455 | data_area_of_tgt = (char *)&pSMBt->hdr.Protocol + |
Jeff Layton | 26ec254 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 456 | get_unaligned_le16(&pSMBt->t2_rsp.DataOffset); |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 457 | |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 458 | /* validate target area */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 459 | data_area_of_src = (char *)&pSMBs->hdr.Protocol + |
| 460 | get_unaligned_le16(&pSMBs->t2_rsp.DataOffset); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 461 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 462 | data_area_of_tgt += total_in_tgt; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 463 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 464 | total_in_tgt += total_in_src; |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 465 | /* is the result too big for the field? */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 466 | if (total_in_tgt > USHRT_MAX) { |
| 467 | cFYI(1, "coalesced DataCount too large (%u)", total_in_tgt); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 468 | return -EPROTO; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 469 | } |
| 470 | put_unaligned_le16(total_in_tgt, &pSMBt->t2_rsp.DataCount); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 471 | |
| 472 | /* fix up the BCC */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 473 | byte_count = get_bcc(target_hdr); |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 474 | byte_count += total_in_src; |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 475 | /* is the result too big for the field? */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 476 | if (byte_count > USHRT_MAX) { |
| 477 | cFYI(1, "coalesced BCC too large (%u)", byte_count); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 478 | return -EPROTO; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 479 | } |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 480 | put_bcc(byte_count, target_hdr); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 481 | |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 482 | byte_count = be32_to_cpu(target_hdr->smb_buf_length); |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 483 | byte_count += total_in_src; |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 484 | /* don't allow buffer to overflow */ |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 485 | if (byte_count > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) { |
| 486 | cFYI(1, "coalesced BCC exceeds buffer size (%u)", byte_count); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 487 | return -ENOBUFS; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 488 | } |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 489 | target_hdr->smb_buf_length = cpu_to_be32(byte_count); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 490 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 491 | /* copy second buffer into end of first buffer */ |
| 492 | memcpy(data_area_of_tgt, data_area_of_src, total_in_src); |
Jeff Layton | 2a2047bc | 2011-04-27 13:29:49 -0400 | [diff] [blame] | 493 | |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 494 | if (remaining != total_in_src) { |
| 495 | /* more responses to go */ |
| 496 | cFYI(1, "waiting for more secondary responses"); |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 497 | return 1; |
Jeff Layton | f5fffce | 2012-01-17 13:49:17 -0500 | [diff] [blame] | 498 | } |
| 499 | |
| 500 | /* we are done */ |
| 501 | cFYI(1, "found the last secondary response"); |
| 502 | return 0; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 503 | } |
| 504 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 505 | static void |
| 506 | cifs_echo_request(struct work_struct *work) |
| 507 | { |
| 508 | int rc; |
| 509 | struct TCP_Server_Info *server = container_of(work, |
| 510 | struct TCP_Server_Info, echo.work); |
| 511 | |
Jeff Layton | 247ec9b | 2011-02-04 17:09:50 -0500 | [diff] [blame] | 512 | /* |
Jeff Layton | 195291e | 2011-02-09 12:01:42 -0500 | [diff] [blame] | 513 | * We cannot send an echo until the NEGOTIATE_PROTOCOL request is |
| 514 | * done, which is indicated by maxBuf != 0. Also, no need to ping if |
| 515 | * we got a response recently |
Jeff Layton | 247ec9b | 2011-02-04 17:09:50 -0500 | [diff] [blame] | 516 | */ |
Jeff Layton | 195291e | 2011-02-09 12:01:42 -0500 | [diff] [blame] | 517 | if (server->maxBuf == 0 || |
Jeff Layton | 247ec9b | 2011-02-04 17:09:50 -0500 | [diff] [blame] | 518 | time_before(jiffies, server->lstrp + SMB_ECHO_INTERVAL - HZ)) |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 519 | goto requeue_echo; |
| 520 | |
| 521 | rc = CIFSSMBEcho(server); |
| 522 | if (rc) |
| 523 | cFYI(1, "Unable to send echo request to server: %s", |
| 524 | server->hostname); |
| 525 | |
| 526 | requeue_echo: |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 527 | queue_delayed_work(cifsiod_wq, &server->echo, SMB_ECHO_INTERVAL); |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 528 | } |
| 529 | |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 530 | static bool |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 531 | allocate_buffers(struct TCP_Server_Info *server) |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 532 | { |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 533 | if (!server->bigbuf) { |
| 534 | server->bigbuf = (char *)cifs_buf_get(); |
| 535 | if (!server->bigbuf) { |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 536 | cERROR(1, "No memory for large SMB response"); |
| 537 | msleep(3000); |
| 538 | /* retry will check if exiting */ |
| 539 | return false; |
| 540 | } |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 541 | } else if (server->large_buf) { |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 542 | /* we are reusing a dirty large buf, clear its start */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 543 | memset(server->bigbuf, 0, header_size()); |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 544 | } |
| 545 | |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 546 | if (!server->smallbuf) { |
| 547 | server->smallbuf = (char *)cifs_small_buf_get(); |
| 548 | if (!server->smallbuf) { |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 549 | cERROR(1, "No memory for SMB response"); |
| 550 | msleep(1000); |
| 551 | /* retry will check if exiting */ |
| 552 | return false; |
| 553 | } |
| 554 | /* beginning of smb buffer is cleared in our buf_get */ |
| 555 | } else { |
| 556 | /* if existing small buf clear beginning */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 557 | memset(server->smallbuf, 0, header_size()); |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 558 | } |
| 559 | |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 560 | return true; |
| 561 | } |
| 562 | |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 563 | static bool |
| 564 | server_unresponsive(struct TCP_Server_Info *server) |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 565 | { |
Pavel Shilovsky | 6dae51a | 2012-02-21 16:50:23 +0300 | [diff] [blame] | 566 | /* |
| 567 | * We need to wait 2 echo intervals to make sure we handle such |
| 568 | * situations right: |
| 569 | * 1s client sends a normal SMB request |
| 570 | * 2s client gets a response |
| 571 | * 30s echo workqueue job pops, and decides we got a response recently |
| 572 | * and don't need to send another |
| 573 | * ... |
| 574 | * 65s kernel_recvmsg times out, and we see that we haven't gotten |
| 575 | * a response in >60s. |
| 576 | */ |
| 577 | if (server->tcpStatus == CifsGood && |
| 578 | time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) { |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 579 | cERROR(1, "Server %s has not responded in %d seconds. " |
| 580 | "Reconnecting...", server->hostname, |
Pavel Shilovsky | 6dae51a | 2012-02-21 16:50:23 +0300 | [diff] [blame] | 581 | (2 * SMB_ECHO_INTERVAL) / HZ); |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 582 | cifs_reconnect(server); |
| 583 | wake_up(&server->response_q); |
| 584 | return true; |
| 585 | } |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 586 | |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 587 | return false; |
| 588 | } |
| 589 | |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 590 | /* |
| 591 | * kvec_array_init - clone a kvec array, and advance into it |
| 592 | * @new: pointer to memory for cloned array |
| 593 | * @iov: pointer to original array |
| 594 | * @nr_segs: number of members in original array |
| 595 | * @bytes: number of bytes to advance into the cloned array |
| 596 | * |
| 597 | * This function will copy the array provided in iov to a section of memory |
| 598 | * and advance the specified number of bytes into the new array. It returns |
| 599 | * the number of segments in the new array. "new" must be at least as big as |
| 600 | * the original iov array. |
| 601 | */ |
| 602 | static unsigned int |
| 603 | kvec_array_init(struct kvec *new, struct kvec *iov, unsigned int nr_segs, |
| 604 | size_t bytes) |
| 605 | { |
| 606 | size_t base = 0; |
| 607 | |
| 608 | while (bytes || !iov->iov_len) { |
| 609 | int copy = min(bytes, iov->iov_len); |
| 610 | |
| 611 | bytes -= copy; |
| 612 | base += copy; |
| 613 | if (iov->iov_len == base) { |
| 614 | iov++; |
| 615 | nr_segs--; |
| 616 | base = 0; |
| 617 | } |
| 618 | } |
| 619 | memcpy(new, iov, sizeof(*iov) * nr_segs); |
| 620 | new->iov_base += base; |
| 621 | new->iov_len -= base; |
| 622 | return nr_segs; |
| 623 | } |
| 624 | |
Jeff Layton | 1041e3f | 2011-10-19 15:28:27 -0400 | [diff] [blame] | 625 | static struct kvec * |
| 626 | get_server_iovec(struct TCP_Server_Info *server, unsigned int nr_segs) |
| 627 | { |
| 628 | struct kvec *new_iov; |
| 629 | |
| 630 | if (server->iov && nr_segs <= server->nr_iov) |
| 631 | return server->iov; |
| 632 | |
| 633 | /* not big enough -- allocate a new one and release the old */ |
| 634 | new_iov = kmalloc(sizeof(*new_iov) * nr_segs, GFP_NOFS); |
| 635 | if (new_iov) { |
| 636 | kfree(server->iov); |
| 637 | server->iov = new_iov; |
| 638 | server->nr_iov = nr_segs; |
| 639 | } |
| 640 | return new_iov; |
| 641 | } |
| 642 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 643 | int |
| 644 | cifs_readv_from_socket(struct TCP_Server_Info *server, struct kvec *iov_orig, |
| 645 | unsigned int nr_segs, unsigned int to_read) |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 646 | { |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 647 | int length = 0; |
| 648 | int total_read; |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 649 | unsigned int segs; |
Jeff Layton | e831e6c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 650 | struct msghdr smb_msg; |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 651 | struct kvec *iov; |
| 652 | |
Jeff Layton | 1041e3f | 2011-10-19 15:28:27 -0400 | [diff] [blame] | 653 | iov = get_server_iovec(server, nr_segs); |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 654 | if (!iov) |
| 655 | return -ENOMEM; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 656 | |
Jeff Layton | e831e6c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 657 | smb_msg.msg_control = NULL; |
| 658 | smb_msg.msg_controllen = 0; |
| 659 | |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 660 | for (total_read = 0; to_read; total_read += length, to_read -= length) { |
Jeff Layton | 95edcff | 2011-12-01 20:22:41 -0500 | [diff] [blame] | 661 | try_to_freeze(); |
| 662 | |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 663 | if (server_unresponsive(server)) { |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 664 | total_read = -EAGAIN; |
Jeff Layton | ba749e6 | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 665 | break; |
| 666 | } |
| 667 | |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 668 | segs = kvec_array_init(iov, iov_orig, nr_segs, total_read); |
| 669 | |
| 670 | length = kernel_recvmsg(server->ssocket, &smb_msg, |
| 671 | iov, segs, to_read, 0); |
| 672 | |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 673 | if (server->tcpStatus == CifsExiting) { |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 674 | total_read = -ESHUTDOWN; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 675 | break; |
| 676 | } else if (server->tcpStatus == CifsNeedReconnect) { |
| 677 | cifs_reconnect(server); |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 678 | total_read = -EAGAIN; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 679 | break; |
| 680 | } else if (length == -ERESTARTSYS || |
| 681 | length == -EAGAIN || |
| 682 | length == -EINTR) { |
| 683 | /* |
| 684 | * Minimum sleep to prevent looping, allowing socket |
| 685 | * to clear and app threads to set tcpStatus |
| 686 | * CifsNeedReconnect if server hung. |
| 687 | */ |
| 688 | usleep_range(1000, 2000); |
| 689 | length = 0; |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 690 | continue; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 691 | } else if (length <= 0) { |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 692 | cFYI(1, "Received no data or error: expecting %d " |
| 693 | "got %d", to_read, length); |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 694 | cifs_reconnect(server); |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 695 | total_read = -EAGAIN; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 696 | break; |
| 697 | } |
| 698 | } |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 699 | return total_read; |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 700 | } |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 701 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 702 | int |
| 703 | cifs_read_from_socket(struct TCP_Server_Info *server, char *buf, |
| 704 | unsigned int to_read) |
Jeff Layton | 42c4dfc | 2011-10-19 15:28:17 -0400 | [diff] [blame] | 705 | { |
| 706 | struct kvec iov; |
| 707 | |
| 708 | iov.iov_base = buf; |
| 709 | iov.iov_len = to_read; |
| 710 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 711 | return cifs_readv_from_socket(server, &iov, 1, to_read); |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 712 | } |
| 713 | |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 714 | static bool |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 715 | is_smb_response(struct TCP_Server_Info *server, unsigned char type) |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 716 | { |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 717 | /* |
| 718 | * The first byte big endian of the length field, |
| 719 | * is actually not part of the length but the type |
| 720 | * with the most common, zero, as regular data. |
| 721 | */ |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 722 | switch (type) { |
| 723 | case RFC1002_SESSION_MESSAGE: |
| 724 | /* Regular SMB response */ |
| 725 | return true; |
| 726 | case RFC1002_SESSION_KEEP_ALIVE: |
| 727 | cFYI(1, "RFC 1002 session keep alive"); |
| 728 | break; |
| 729 | case RFC1002_POSITIVE_SESSION_RESPONSE: |
| 730 | cFYI(1, "RFC 1002 positive session response"); |
| 731 | break; |
| 732 | case RFC1002_NEGATIVE_SESSION_RESPONSE: |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 733 | /* |
| 734 | * We get this from Windows 98 instead of an error on |
| 735 | * SMB negprot response. |
| 736 | */ |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 737 | cFYI(1, "RFC 1002 negative session response"); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 738 | /* give server a second to clean up */ |
| 739 | msleep(1000); |
| 740 | /* |
| 741 | * Always try 445 first on reconnect since we get NACK |
| 742 | * on some if we ever connected to port 139 (the NACK |
| 743 | * is since we do not begin with RFC1001 session |
| 744 | * initialize frame). |
| 745 | */ |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 746 | cifs_set_port((struct sockaddr *)&server->dstaddr, CIFS_PORT); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 747 | cifs_reconnect(server); |
| 748 | wake_up(&server->response_q); |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 749 | break; |
| 750 | default: |
| 751 | cERROR(1, "RFC 1002 unknown response type 0x%x", type); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 752 | cifs_reconnect(server); |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 753 | } |
| 754 | |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 755 | return false; |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 756 | } |
| 757 | |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 758 | static struct mid_q_entry * |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 759 | find_mid(struct TCP_Server_Info *server, char *buffer) |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 760 | { |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 761 | struct smb_hdr *buf = (struct smb_hdr *)buffer; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 762 | struct mid_q_entry *mid; |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 763 | |
| 764 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 765 | list_for_each_entry(mid, &server->pending_mid_q, qhead) { |
| 766 | if (mid->mid == buf->Mid && |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 767 | mid->mid_state == MID_REQUEST_SUBMITTED && |
| 768 | le16_to_cpu(mid->command) == buf->Command) { |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 769 | spin_unlock(&GlobalMid_Lock); |
| 770 | return mid; |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 771 | } |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 772 | } |
| 773 | spin_unlock(&GlobalMid_Lock); |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 774 | return NULL; |
| 775 | } |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 776 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 777 | void |
| 778 | dequeue_mid(struct mid_q_entry *mid, bool malformed) |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 779 | { |
| 780 | #ifdef CONFIG_CIFS_STATS2 |
| 781 | mid->when_received = jiffies; |
| 782 | #endif |
| 783 | spin_lock(&GlobalMid_Lock); |
| 784 | if (!malformed) |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 785 | mid->mid_state = MID_RESPONSE_RECEIVED; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 786 | else |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 787 | mid->mid_state = MID_RESPONSE_MALFORMED; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 788 | list_del_init(&mid->qhead); |
| 789 | spin_unlock(&GlobalMid_Lock); |
| 790 | } |
| 791 | |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 792 | static void |
| 793 | handle_mid(struct mid_q_entry *mid, struct TCP_Server_Info *server, |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 794 | char *buf, int malformed) |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 795 | { |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 796 | if (malformed == 0 && check2ndT2(buf) > 0) { |
| 797 | mid->multiRsp = true; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 798 | if (mid->resp_buf) { |
| 799 | /* merge response - fix up 1st*/ |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 800 | malformed = coalesce_t2(buf, mid->resp_buf); |
| 801 | if (malformed > 0) |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 802 | return; |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 803 | |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 804 | /* All parts received or packet is malformed. */ |
| 805 | mid->multiEnd = true; |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 806 | return dequeue_mid(mid, malformed); |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 807 | } |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 808 | if (!server->large_buf) { |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 809 | /*FIXME: switch to already allocated largebuf?*/ |
| 810 | cERROR(1, "1st trans2 resp needs bigbuf"); |
| 811 | } else { |
| 812 | /* Have first buffer */ |
| 813 | mid->resp_buf = buf; |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 814 | mid->large_buf = true; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 815 | server->bigbuf = NULL; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 816 | } |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 817 | return; |
Jeff Layton | ea1f450 | 2011-10-19 15:29:05 -0400 | [diff] [blame] | 818 | } |
| 819 | mid->resp_buf = buf; |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 820 | mid->large_buf = server->large_buf; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 821 | /* Was previous buf put in mpx struct for multi-rsp? */ |
| 822 | if (!mid->multiRsp) { |
| 823 | /* smb buffer will be freed by user thread */ |
| 824 | if (server->large_buf) |
| 825 | server->bigbuf = NULL; |
| 826 | else |
| 827 | server->smallbuf = NULL; |
| 828 | } |
Jeff Layton | ffc00e2 | 2011-10-19 15:29:13 -0400 | [diff] [blame] | 829 | dequeue_mid(mid, malformed); |
Pavel Shilovsky | ad69bae | 2011-08-01 13:19:43 +0400 | [diff] [blame] | 830 | } |
| 831 | |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 832 | static void clean_demultiplex_info(struct TCP_Server_Info *server) |
| 833 | { |
| 834 | int length; |
| 835 | |
| 836 | /* take it off the list, if it's not already */ |
| 837 | spin_lock(&cifs_tcp_ses_lock); |
| 838 | list_del_init(&server->tcp_ses_list); |
| 839 | spin_unlock(&cifs_tcp_ses_lock); |
| 840 | |
| 841 | spin_lock(&GlobalMid_Lock); |
| 842 | server->tcpStatus = CifsExiting; |
| 843 | spin_unlock(&GlobalMid_Lock); |
| 844 | wake_up_all(&server->response_q); |
| 845 | |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 846 | /* check if we have blocked requests that need to free */ |
Pavel Shilovsky | fc40f9c | 2012-02-17 17:09:12 +0300 | [diff] [blame] | 847 | spin_lock(&server->req_lock); |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 848 | if (server->credits <= 0) |
| 849 | server->credits = 1; |
Pavel Shilovsky | fc40f9c | 2012-02-17 17:09:12 +0300 | [diff] [blame] | 850 | spin_unlock(&server->req_lock); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 851 | /* |
| 852 | * Although there should not be any requests blocked on this queue it |
| 853 | * can not hurt to be paranoid and try to wake up requests that may |
| 854 | * haven been blocked when more than 50 at time were on the wire to the |
| 855 | * same server - they now will see the session is in exit state and get |
| 856 | * out of SendReceive. |
| 857 | */ |
| 858 | wake_up_all(&server->request_q); |
| 859 | /* give those requests time to exit */ |
| 860 | msleep(125); |
| 861 | |
| 862 | if (server->ssocket) { |
| 863 | sock_release(server->ssocket); |
| 864 | server->ssocket = NULL; |
| 865 | } |
| 866 | |
| 867 | if (!list_empty(&server->pending_mid_q)) { |
| 868 | struct list_head dispose_list; |
| 869 | struct mid_q_entry *mid_entry; |
| 870 | struct list_head *tmp, *tmp2; |
| 871 | |
| 872 | INIT_LIST_HEAD(&dispose_list); |
| 873 | spin_lock(&GlobalMid_Lock); |
| 874 | list_for_each_safe(tmp, tmp2, &server->pending_mid_q) { |
| 875 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 876 | cFYI(1, "Clearing mid 0x%llx", mid_entry->mid); |
| 877 | mid_entry->mid_state = MID_SHUTDOWN; |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 878 | list_move(&mid_entry->qhead, &dispose_list); |
| 879 | } |
| 880 | spin_unlock(&GlobalMid_Lock); |
| 881 | |
| 882 | /* now walk dispose list and issue callbacks */ |
| 883 | list_for_each_safe(tmp, tmp2, &dispose_list) { |
| 884 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); |
Pavel Shilovsky | 7c9421e | 2012-03-23 14:28:03 -0400 | [diff] [blame] | 885 | cFYI(1, "Callback mid 0x%llx", mid_entry->mid); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 886 | list_del_init(&mid_entry->qhead); |
| 887 | mid_entry->callback(mid_entry); |
| 888 | } |
| 889 | /* 1/8th of sec is more than enough time for them to exit */ |
| 890 | msleep(125); |
| 891 | } |
| 892 | |
| 893 | if (!list_empty(&server->pending_mid_q)) { |
| 894 | /* |
| 895 | * mpx threads have not exited yet give them at least the smb |
| 896 | * send timeout time for long ops. |
| 897 | * |
| 898 | * Due to delays on oplock break requests, we need to wait at |
| 899 | * least 45 seconds before giving up on a request getting a |
| 900 | * response and going ahead and killing cifsd. |
| 901 | */ |
| 902 | cFYI(1, "Wait for exit from demultiplex thread"); |
| 903 | msleep(46000); |
| 904 | /* |
| 905 | * If threads still have not exited they are probably never |
| 906 | * coming home not much else we can do but free the memory. |
| 907 | */ |
| 908 | } |
| 909 | |
| 910 | kfree(server->hostname); |
Jeff Layton | 1041e3f | 2011-10-19 15:28:27 -0400 | [diff] [blame] | 911 | kfree(server->iov); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 912 | kfree(server); |
| 913 | |
| 914 | length = atomic_dec_return(&tcpSesAllocCount); |
| 915 | if (length > 0) |
| 916 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
| 917 | GFP_KERNEL); |
| 918 | } |
| 919 | |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 920 | static int |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 921 | standard_receive3(struct TCP_Server_Info *server, struct mid_q_entry *mid) |
| 922 | { |
| 923 | int length; |
| 924 | char *buf = server->smallbuf; |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 925 | unsigned int pdu_length = get_rfc1002_length(buf); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 926 | |
| 927 | /* make sure this will fit in a large buffer */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 928 | if (pdu_length > CIFSMaxBufSize + max_header_size() - 4) { |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 929 | cERROR(1, "SMB response too long (%u bytes)", |
| 930 | pdu_length); |
| 931 | cifs_reconnect(server); |
| 932 | wake_up(&server->response_q); |
| 933 | return -EAGAIN; |
| 934 | } |
| 935 | |
| 936 | /* switch to large buffer if too big for a small one */ |
| 937 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
| 938 | server->large_buf = true; |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 939 | memcpy(server->bigbuf, buf, server->total_read); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 940 | buf = server->bigbuf; |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | /* now read the rest */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 944 | length = cifs_read_from_socket(server, buf + header_size() - 1, |
| 945 | pdu_length - header_size() + 1 + 4); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 946 | if (length < 0) |
| 947 | return length; |
| 948 | server->total_read += length; |
| 949 | |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 950 | dump_smb(buf, server->total_read); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 951 | |
| 952 | /* |
| 953 | * We know that we received enough to get to the MID as we |
| 954 | * checked the pdu_length earlier. Now check to see |
| 955 | * if the rest of the header is OK. We borrow the length |
| 956 | * var for the rest of the loop to avoid a new stack var. |
| 957 | * |
| 958 | * 48 bytes is enough to display the header and a little bit |
| 959 | * into the payload for debugging purposes. |
| 960 | */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 961 | length = checkSMB(buf, server->total_read); |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 962 | if (length != 0) |
| 963 | cifs_dump_mem("Bad SMB: ", buf, |
| 964 | min_t(unsigned int, server->total_read, 48)); |
| 965 | |
Jeff Layton | ff4fa4a | 2012-02-07 06:31:05 -0500 | [diff] [blame] | 966 | if (!mid) |
| 967 | return length; |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 968 | |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 969 | handle_mid(mid, server, buf, length); |
Jeff Layton | ff4fa4a | 2012-02-07 06:31:05 -0500 | [diff] [blame] | 970 | return 0; |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 971 | } |
| 972 | |
| 973 | static int |
Al Viro | 7c97c20 | 2011-06-21 08:51:28 -0400 | [diff] [blame] | 974 | cifs_demultiplex_thread(void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | { |
| 976 | int length; |
Al Viro | 7c97c20 | 2011-06-21 08:51:28 -0400 | [diff] [blame] | 977 | struct TCP_Server_Info *server = p; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 978 | unsigned int pdu_length; |
| 979 | char *buf = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | struct task_struct *task_to_wake = NULL; |
| 981 | struct mid_q_entry *mid_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | current->flags |= PF_MEMALLOC; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 984 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
Jeff Layton | 93d0ec8 | 2008-08-02 08:00:48 -0400 | [diff] [blame] | 985 | |
| 986 | length = atomic_inc_return(&tcpSesAllocCount); |
| 987 | if (length > 1) |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame] | 988 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
| 989 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | |
Rafael J. Wysocki | 8314418 | 2007-07-17 04:03:35 -0700 | [diff] [blame] | 991 | set_freezable(); |
Jeff Layton | 469ee61 | 2008-10-16 18:46:39 +0000 | [diff] [blame] | 992 | while (server->tcpStatus != CifsExiting) { |
Steve French | ede1327 | 2005-08-30 20:10:14 -0700 | [diff] [blame] | 993 | if (try_to_freeze()) |
| 994 | continue; |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 995 | |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 996 | if (!allocate_buffers(server)) |
Pavel Shilovsky | 3d9c247 | 2011-08-01 13:19:40 +0400 | [diff] [blame] | 997 | continue; |
Steve French | b8643e1 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 998 | |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 999 | server->large_buf = false; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 1000 | buf = server->smallbuf; |
Steve French | f01d5e1 | 2007-08-30 21:13:31 +0000 | [diff] [blame] | 1001 | pdu_length = 4; /* enough to get RFC1001 header */ |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 1002 | |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 1003 | length = cifs_read_from_socket(server, buf, pdu_length); |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 1004 | if (length < 0) |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 1005 | continue; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 1006 | server->total_read = length; |
Steve French | 67010fb | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 1007 | |
Pavel Shilovsky | 98bac62 | 2011-08-01 13:19:42 +0400 | [diff] [blame] | 1008 | /* |
| 1009 | * The right amount was read from socket - 4 bytes, |
| 1010 | * so we can now interpret the length field. |
| 1011 | */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 1012 | pdu_length = get_rfc1002_length(buf); |
Steve French | 46810cb | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 1013 | |
Jeff Layton | fe11e4c | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 1014 | cFYI(1, "RFC1002 header 0x%x", pdu_length); |
| 1015 | if (!is_smb_response(server, buf[0])) |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1016 | continue; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 1017 | |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 1018 | /* make sure we have enough to get to the MID */ |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 1019 | if (pdu_length < header_size() - 1 - 4) { |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 1020 | cERROR(1, "SMB response too short (%u bytes)", |
| 1021 | pdu_length); |
| 1022 | cifs_reconnect(server); |
| 1023 | wake_up(&server->response_q); |
| 1024 | continue; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 1025 | } |
Pavel Shilovsky | e7015fb | 2011-08-01 13:19:41 +0400 | [diff] [blame] | 1026 | |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 1027 | /* read down to the MID */ |
Jeff Layton | e28bc5b | 2011-10-19 15:30:07 -0400 | [diff] [blame] | 1028 | length = cifs_read_from_socket(server, buf + 4, |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 1029 | header_size() - 1 - 4); |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 1030 | if (length < 0) |
| 1031 | continue; |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 1032 | server->total_read += length; |
Jeff Layton | 89482a5 | 2011-10-19 15:28:57 -0400 | [diff] [blame] | 1033 | |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 1034 | mid_entry = find_mid(server, buf); |
Jeff Layton | c8054eb | 2011-10-19 15:29:31 -0400 | [diff] [blame] | 1035 | |
Jeff Layton | 44d22d8 | 2011-10-19 15:29:49 -0400 | [diff] [blame] | 1036 | if (!mid_entry || !mid_entry->receive) |
| 1037 | length = standard_receive3(server, mid_entry); |
| 1038 | else |
| 1039 | length = mid_entry->receive(server, mid_entry); |
| 1040 | |
Jeff Layton | a52c1eb | 2011-10-11 06:41:32 -0400 | [diff] [blame] | 1041 | if (length < 0) |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 1042 | continue; |
| 1043 | |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 1044 | if (server->large_buf) |
Jeff Layton | e9097ab | 2011-10-19 15:29:40 -0400 | [diff] [blame] | 1045 | buf = server->bigbuf; |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 1046 | |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 1047 | server->lstrp = jiffies; |
Jeff Layton | 2b84a36c | 2011-01-11 07:24:21 -0500 | [diff] [blame] | 1048 | if (mid_entry != NULL) { |
Jeff Layton | 2a37ef9 | 2011-10-19 15:29:23 -0400 | [diff] [blame] | 1049 | if (!mid_entry->multiRsp || mid_entry->multiEnd) |
| 1050 | mid_entry->callback(mid_entry); |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 1051 | } else if (!is_valid_oplock_break(buf, server)) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1052 | cERROR(1, "No task to wake, unknown frame received! " |
Jeff Layton | 8097531 | 2011-01-11 07:24:02 -0500 | [diff] [blame] | 1053 | "NumMids %d", atomic_read(&midCount)); |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 1054 | cifs_dump_mem("Received Data is: ", buf, header_size()); |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 1055 | #ifdef CONFIG_CIFS_DEBUG2 |
Pavel Shilovsky | d4e4854 | 2012-03-23 14:28:02 -0400 | [diff] [blame] | 1056 | cifs_dump_detail(buf); |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 1057 | cifs_dump_mids(server); |
| 1058 | #endif /* CIFS_DEBUG2 */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1059 | |
Steve French | e4eb295 | 2005-04-28 22:41:09 -0700 | [diff] [blame] | 1060 | } |
| 1061 | } /* end while !EXITING */ |
| 1062 | |
Justin P. Mattock | fd62cb7 | 2011-02-24 22:15:02 -0800 | [diff] [blame] | 1063 | /* 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] | 1064 | cifs_buf_release(server->bigbuf); |
| 1065 | if (server->smallbuf) /* no sense logging a debug message if NULL */ |
| 1066 | cifs_small_buf_release(server->smallbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 1068 | task_to_wake = xchg(&server->tsk, NULL); |
Pavel Shilovsky | 762dfd1 | 2011-08-01 13:19:44 +0400 | [diff] [blame] | 1069 | clean_demultiplex_info(server); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1070 | |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 1071 | /* if server->tsk was NULL then wait for a signal before exiting */ |
| 1072 | if (!task_to_wake) { |
| 1073 | set_current_state(TASK_INTERRUPTIBLE); |
| 1074 | while (!signal_pending(current)) { |
| 1075 | schedule(); |
| 1076 | set_current_state(TASK_INTERRUPTIBLE); |
| 1077 | } |
| 1078 | set_current_state(TASK_RUNNING); |
| 1079 | } |
| 1080 | |
Jeff Layton | 0468a2c | 2008-12-01 07:09:35 -0500 | [diff] [blame] | 1081 | module_put_and_exit(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | } |
| 1083 | |
Jeff Layton | c359cf3 | 2007-11-16 22:22:06 +0000 | [diff] [blame] | 1084 | /* extract the host portion of the UNC string */ |
| 1085 | static char * |
| 1086 | extract_hostname(const char *unc) |
| 1087 | { |
| 1088 | const char *src; |
| 1089 | char *dst, *delim; |
| 1090 | unsigned int len; |
| 1091 | |
| 1092 | /* skip double chars at beginning of string */ |
| 1093 | /* BB: check validity of these bytes? */ |
| 1094 | src = unc + 2; |
| 1095 | |
| 1096 | /* delimiter between hostname and sharename is always '\\' now */ |
| 1097 | delim = strchr(src, '\\'); |
| 1098 | if (!delim) |
| 1099 | return ERR_PTR(-EINVAL); |
| 1100 | |
| 1101 | len = delim - src; |
| 1102 | dst = kmalloc((len + 1), GFP_KERNEL); |
| 1103 | if (dst == NULL) |
| 1104 | return ERR_PTR(-ENOMEM); |
| 1105 | |
| 1106 | memcpy(dst, src, len); |
| 1107 | dst[len] = '\0'; |
| 1108 | |
| 1109 | return dst; |
| 1110 | } |
| 1111 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1112 | static int get_option_ul(substring_t args[], unsigned long *option) |
| 1113 | { |
| 1114 | int rc; |
| 1115 | char *string; |
| 1116 | |
| 1117 | string = match_strdup(args); |
| 1118 | if (string == NULL) |
| 1119 | return -ENOMEM; |
| 1120 | rc = kstrtoul(string, 10, option); |
| 1121 | kfree(string); |
| 1122 | |
| 1123 | return rc; |
| 1124 | } |
| 1125 | |
| 1126 | |
| 1127 | static int cifs_parse_security_flavors(char *value, |
| 1128 | struct smb_vol *vol) |
| 1129 | { |
| 1130 | |
| 1131 | substring_t args[MAX_OPT_ARGS]; |
| 1132 | |
| 1133 | switch (match_token(value, cifs_secflavor_tokens, args)) { |
| 1134 | case Opt_sec_krb5: |
| 1135 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
| 1136 | break; |
| 1137 | case Opt_sec_krb5i: |
| 1138 | vol->secFlg |= CIFSSEC_MAY_KRB5 | CIFSSEC_MUST_SIGN; |
| 1139 | break; |
| 1140 | case Opt_sec_krb5p: |
| 1141 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | CIFSSEC_MAY_KRB5; */ |
| 1142 | cERROR(1, "Krb5 cifs privacy not supported"); |
| 1143 | break; |
| 1144 | case Opt_sec_ntlmssp: |
| 1145 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; |
| 1146 | break; |
| 1147 | case Opt_sec_ntlmsspi: |
| 1148 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | CIFSSEC_MUST_SIGN; |
| 1149 | break; |
| 1150 | case Opt_ntlm: |
| 1151 | /* ntlm is default so can be turned off too */ |
| 1152 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
| 1153 | break; |
| 1154 | case Opt_sec_ntlmi: |
| 1155 | vol->secFlg |= CIFSSEC_MAY_NTLM | CIFSSEC_MUST_SIGN; |
| 1156 | break; |
| 1157 | case Opt_sec_nontlm: |
| 1158 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
| 1159 | break; |
| 1160 | case Opt_sec_ntlmv2i: |
| 1161 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | CIFSSEC_MUST_SIGN; |
| 1162 | break; |
| 1163 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
| 1164 | case Opt_sec_lanman: |
| 1165 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
| 1166 | break; |
| 1167 | #endif |
| 1168 | case Opt_sec_none: |
| 1169 | vol->nullauth = 1; |
| 1170 | break; |
| 1171 | default: |
| 1172 | cERROR(1, "bad security option: %s", value); |
| 1173 | return 1; |
| 1174 | } |
| 1175 | |
| 1176 | return 0; |
| 1177 | } |
| 1178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | static int |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1180 | cifs_parse_mount_options(const char *mountdata, const char *devname, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1181 | struct smb_vol *vol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | { |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1183 | char *data, *end; |
Vasily Averin | 957df45 | 2011-06-06 11:33:12 +0400 | [diff] [blame] | 1184 | char *mountdata_copy = NULL, *options; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | unsigned int temp_len, i, j; |
| 1186 | char separator[2]; |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1187 | short int override_uid = -1; |
| 1188 | short int override_gid = -1; |
| 1189 | bool uid_specified = false; |
| 1190 | bool gid_specified = false; |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1191 | bool sloppy = false; |
| 1192 | char *invalid = NULL; |
Jeff Layton | 8846399 | 2010-11-22 15:31:03 -0500 | [diff] [blame] | 1193 | char *nodename = utsname()->nodename; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1194 | char *string = NULL; |
| 1195 | char *tmp_end, *value; |
| 1196 | char delim; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | |
| 1198 | separator[0] = ','; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1199 | separator[1] = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1200 | delim = separator[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | |
Jeff Layton | 8846399 | 2010-11-22 15:31:03 -0500 | [diff] [blame] | 1202 | /* |
| 1203 | * does not have to be perfect mapping since field is |
| 1204 | * informational, only used for servers that do not support |
| 1205 | * port 445 and it can be overridden at mount time |
| 1206 | */ |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 1207 | memset(vol->source_rfc1001_name, 0x20, RFC1001_NAME_LEN); |
| 1208 | for (i = 0; i < strnlen(nodename, RFC1001_NAME_LEN); i++) |
Jeff Layton | 8846399 | 2010-11-22 15:31:03 -0500 | [diff] [blame] | 1209 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
| 1210 | |
Jeff Layton | 1397f2e | 2011-01-07 11:30:28 -0500 | [diff] [blame] | 1211 | vol->source_rfc1001_name[RFC1001_NAME_LEN] = 0; |
Steve French | a10faeb2 | 2005-08-22 21:38:31 -0700 | [diff] [blame] | 1212 | /* null target name indicates to use *SMBSERVR default called name |
| 1213 | if we end up sending RFC1001 session initialize */ |
| 1214 | vol->target_rfc1001_name[0] = 0; |
Jeff Layton | 3e4b3e1 | 2010-07-19 18:00:17 -0400 | [diff] [blame] | 1215 | vol->cred_uid = current_uid(); |
| 1216 | vol->linux_uid = current_uid(); |
David Howells | a001e5b | 2008-11-14 10:38:47 +1100 | [diff] [blame] | 1217 | vol->linux_gid = current_gid(); |
Jeff Layton | f55ed1a | 2009-05-26 16:28:11 -0400 | [diff] [blame] | 1218 | |
| 1219 | /* default to only allowing write access to owner of the mount */ |
| 1220 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | |
| 1222 | /* 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] | 1223 | /* default is always to request posix paths. */ |
| 1224 | vol->posix_paths = 1; |
Jeff Layton | a0c9217 | 2009-05-27 15:40:47 -0400 | [diff] [blame] | 1225 | /* default to using server inode numbers where available */ |
| 1226 | vol->server_ino = 1; |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 1227 | |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 1228 | vol->actimeo = CIFS_DEF_ACTIMEO; |
| 1229 | |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1230 | if (!mountdata) |
| 1231 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1233 | mountdata_copy = kstrndup(mountdata, PAGE_SIZE, GFP_KERNEL); |
| 1234 | if (!mountdata_copy) |
| 1235 | goto cifs_parse_mount_err; |
| 1236 | |
| 1237 | options = mountdata_copy; |
Pavel Shilovsky | 4906e50 | 2011-04-14 22:00:56 +0400 | [diff] [blame] | 1238 | end = options + strlen(options); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1239 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1240 | if (strncmp(options, "sep=", 4) == 0) { |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1241 | if (options[4] != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | separator[0] = options[4]; |
| 1243 | options += 5; |
| 1244 | } else { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 1245 | cFYI(1, "Null separator not allowed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | } |
| 1247 | } |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 1248 | vol->backupuid_specified = false; /* no backup intent for a user */ |
| 1249 | vol->backupgid_specified = false; /* no backup intent for a group */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | while ((data = strsep(&options, separator)) != NULL) { |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1252 | substring_t args[MAX_OPT_ARGS]; |
| 1253 | unsigned long option; |
| 1254 | int token; |
| 1255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | if (!*data) |
| 1257 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1259 | token = match_token(data, cifs_mount_option_tokens, args); |
| 1260 | |
| 1261 | switch (token) { |
| 1262 | |
| 1263 | /* Ingnore the following */ |
| 1264 | case Opt_ignore: |
| 1265 | break; |
| 1266 | |
| 1267 | /* Boolean values */ |
| 1268 | case Opt_user_xattr: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | vol->no_xattr = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1270 | break; |
| 1271 | case Opt_nouser_xattr: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | vol->no_xattr = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1273 | break; |
| 1274 | case Opt_forceuid: |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1275 | override_uid = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1276 | break; |
| 1277 | case Opt_noforceuid: |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1278 | override_uid = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1279 | break; |
| 1280 | case Opt_noblocksend: |
Steve French | edf1ae4 | 2008-10-29 00:47:57 +0000 | [diff] [blame] | 1281 | vol->noblocksnd = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1282 | break; |
| 1283 | case Opt_noautotune: |
Steve French | edf1ae4 | 2008-10-29 00:47:57 +0000 | [diff] [blame] | 1284 | vol->noautotune = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1285 | break; |
| 1286 | case Opt_hard: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | vol->retry = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1288 | break; |
| 1289 | case Opt_soft: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | vol->retry = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1291 | break; |
| 1292 | case Opt_perm: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | vol->noperm = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1294 | break; |
| 1295 | case Opt_noperm: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | vol->noperm = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1297 | break; |
| 1298 | case Opt_mapchars: |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 1299 | vol->remap = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1300 | break; |
| 1301 | case Opt_nomapchars: |
Steve French | 6a0b482 | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 1302 | vol->remap = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1303 | break; |
| 1304 | case Opt_sfu: |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1305 | vol->sfu_emul = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1306 | break; |
| 1307 | case Opt_nosfu: |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1308 | vol->sfu_emul = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1309 | break; |
| 1310 | case Opt_nodfs: |
Steve French | 2c1b861 | 2008-10-16 18:35:21 +0000 | [diff] [blame] | 1311 | vol->nodfs = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1312 | break; |
| 1313 | case Opt_posixpaths: |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 1314 | vol->posix_paths = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1315 | break; |
| 1316 | case Opt_noposixpaths: |
Jeremy Allison | ac67055 | 2005-06-22 17:26:35 -0700 | [diff] [blame] | 1317 | vol->posix_paths = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1318 | break; |
| 1319 | case Opt_nounix: |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 1320 | vol->no_linux_ext = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1321 | break; |
| 1322 | case Opt_nocase: |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1323 | vol->nocase = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1324 | break; |
| 1325 | case Opt_brl: |
Steve French | c46fa8a | 2005-08-18 20:49:57 -0700 | [diff] [blame] | 1326 | vol->nobrl = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1327 | break; |
| 1328 | case Opt_nobrl: |
Steve French | c46fa8a | 2005-08-18 20:49:57 -0700 | [diff] [blame] | 1329 | vol->nobrl = 1; |
Pavel Shilovsky | 5cfdddc | 2012-03-27 20:51:15 +0400 | [diff] [blame^] | 1330 | /* |
| 1331 | * turn off mandatory locking in mode |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1332 | * if remote locking is turned off since the |
Pavel Shilovsky | 5cfdddc | 2012-03-27 20:51:15 +0400 | [diff] [blame^] | 1333 | * local vfs will do advisory |
| 1334 | */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1335 | if (vol->file_mode == |
| 1336 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) |
Steve French | d3485d3 | 2005-08-19 11:04:29 -0700 | [diff] [blame] | 1337 | vol->file_mode = S_IALLUGO; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1338 | break; |
| 1339 | case Opt_forcemandatorylock: |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 1340 | vol->mand_lock = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1341 | break; |
| 1342 | case Opt_setuids: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | vol->setuids = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1344 | break; |
| 1345 | case Opt_nosetuids: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | vol->setuids = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1347 | break; |
| 1348 | case Opt_dynperm: |
Jeff Layton | d0a9c07 | 2008-05-12 22:23:49 +0000 | [diff] [blame] | 1349 | vol->dynperm = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1350 | break; |
| 1351 | case Opt_nodynperm: |
Jeff Layton | d0a9c07 | 2008-05-12 22:23:49 +0000 | [diff] [blame] | 1352 | vol->dynperm = false; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1353 | break; |
| 1354 | case Opt_nohard: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | vol->retry = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1356 | break; |
| 1357 | case Opt_nosoft: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | vol->retry = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1359 | break; |
| 1360 | case Opt_nointr: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | vol->intr = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1362 | break; |
| 1363 | case Opt_intr: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | vol->intr = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1365 | break; |
| 1366 | case Opt_nostrictsync: |
Steve French | be65244 | 2009-02-23 15:21:59 +0000 | [diff] [blame] | 1367 | vol->nostrictsync = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1368 | break; |
| 1369 | case Opt_strictsync: |
Steve French | be65244 | 2009-02-23 15:21:59 +0000 | [diff] [blame] | 1370 | vol->nostrictsync = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1371 | break; |
| 1372 | case Opt_serverino: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | vol->server_ino = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1374 | break; |
| 1375 | case Opt_noserverino: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | vol->server_ino = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1377 | break; |
| 1378 | case Opt_rwpidforward: |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 1379 | vol->rwpidforward = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1380 | break; |
| 1381 | case Opt_cifsacl: |
Steve French | 0a4b92c | 2006-01-12 15:44:21 -0800 | [diff] [blame] | 1382 | vol->cifs_acl = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1383 | break; |
| 1384 | case Opt_nocifsacl: |
Steve French | 0a4b92c | 2006-01-12 15:44:21 -0800 | [diff] [blame] | 1385 | vol->cifs_acl = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1386 | break; |
| 1387 | case Opt_acl: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | vol->no_psx_acl = 0; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1389 | break; |
| 1390 | case Opt_noacl: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | vol->no_psx_acl = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1392 | break; |
| 1393 | case Opt_locallease: |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 1394 | vol->local_lease = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1395 | break; |
| 1396 | case Opt_sign: |
Steve French | 750d115 | 2006-06-27 06:28:30 +0000 | [diff] [blame] | 1397 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1398 | break; |
| 1399 | case Opt_seal: |
Steve French | 95b1cb9 | 2008-05-15 16:44:38 +0000 | [diff] [blame] | 1400 | /* we do not do the following in secFlags because seal |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1401 | * is a per tree connection (mount) not a per socket |
| 1402 | * or per-smb connection option in the protocol |
| 1403 | * vol->secFlg |= CIFSSEC_MUST_SEAL; |
| 1404 | */ |
Steve French | 95b1cb9 | 2008-05-15 16:44:38 +0000 | [diff] [blame] | 1405 | vol->seal = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1406 | break; |
| 1407 | case Opt_direct: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | vol->direct_io = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1409 | break; |
| 1410 | case Opt_strictcache: |
Pavel Shilovsky | d39454f | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 1411 | vol->strict_io = 1; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1412 | break; |
| 1413 | case Opt_noac: |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1414 | printk(KERN_WARNING "CIFS: Mount option noac not " |
| 1415 | "supported. Instead set " |
| 1416 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1417 | break; |
| 1418 | case Opt_fsc: |
Suresh Jayaraman | 607a569 | 2010-11-24 17:49:05 +0530 | [diff] [blame] | 1419 | #ifndef CONFIG_CIFS_FSCACHE |
Jeff Layton | 83fb086 | 2011-06-08 07:35:24 -0400 | [diff] [blame] | 1420 | cERROR(1, "FS-Cache support needs CONFIG_CIFS_FSCACHE " |
Suresh Jayaraman | 607a569 | 2010-11-24 17:49:05 +0530 | [diff] [blame] | 1421 | "kernel config option set"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1422 | goto cifs_parse_mount_err; |
Suresh Jayaraman | 607a569 | 2010-11-24 17:49:05 +0530 | [diff] [blame] | 1423 | #endif |
Suresh Jayaraman | fa1df75 | 2010-07-05 18:13:36 +0530 | [diff] [blame] | 1424 | vol->fsc = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1425 | break; |
| 1426 | case Opt_mfsymlinks: |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 1427 | vol->mfsymlinks = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1428 | break; |
| 1429 | case Opt_multiuser: |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1430 | vol->multiuser = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1431 | break; |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1432 | case Opt_sloppy: |
| 1433 | sloppy = true; |
| 1434 | break; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1435 | |
| 1436 | /* Numeric Values */ |
| 1437 | case Opt_backupuid: |
| 1438 | if (get_option_ul(args, &option)) { |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 1439 | cERROR(1, "%s: Invalid backupuid value", |
| 1440 | __func__); |
| 1441 | goto cifs_parse_mount_err; |
| 1442 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1443 | vol->backupuid = option; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 1444 | vol->backupuid_specified = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1445 | break; |
| 1446 | case Opt_backupgid: |
| 1447 | if (get_option_ul(args, &option)) { |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 1448 | cERROR(1, "%s: Invalid backupgid value", |
| 1449 | __func__); |
| 1450 | goto cifs_parse_mount_err; |
| 1451 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1452 | vol->backupgid = option; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 1453 | vol->backupgid_specified = true; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1454 | break; |
| 1455 | case Opt_uid: |
| 1456 | if (get_option_ul(args, &option)) { |
| 1457 | cERROR(1, "%s: Invalid uid value", |
| 1458 | __func__); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1459 | goto cifs_parse_mount_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1461 | vol->linux_uid = option; |
| 1462 | uid_specified = true; |
| 1463 | break; |
| 1464 | case Opt_cruid: |
| 1465 | if (get_option_ul(args, &option)) { |
| 1466 | cERROR(1, "%s: Invalid cruid value", |
| 1467 | __func__); |
| 1468 | goto cifs_parse_mount_err; |
| 1469 | } |
| 1470 | vol->cred_uid = option; |
| 1471 | break; |
| 1472 | case Opt_gid: |
| 1473 | if (get_option_ul(args, &option)) { |
| 1474 | cERROR(1, "%s: Invalid gid value", |
| 1475 | __func__); |
| 1476 | goto cifs_parse_mount_err; |
| 1477 | } |
| 1478 | vol->linux_gid = option; |
| 1479 | gid_specified = true; |
| 1480 | break; |
| 1481 | case Opt_file_mode: |
| 1482 | if (get_option_ul(args, &option)) { |
| 1483 | cERROR(1, "%s: Invalid file_mode value", |
| 1484 | __func__); |
| 1485 | goto cifs_parse_mount_err; |
| 1486 | } |
| 1487 | vol->file_mode = option; |
| 1488 | break; |
| 1489 | case Opt_dirmode: |
| 1490 | if (get_option_ul(args, &option)) { |
| 1491 | cERROR(1, "%s: Invalid dir_mode value", |
| 1492 | __func__); |
| 1493 | goto cifs_parse_mount_err; |
| 1494 | } |
| 1495 | vol->dir_mode = option; |
| 1496 | break; |
| 1497 | case Opt_port: |
| 1498 | if (get_option_ul(args, &option)) { |
| 1499 | cERROR(1, "%s: Invalid port value", |
| 1500 | __func__); |
| 1501 | goto cifs_parse_mount_err; |
| 1502 | } |
| 1503 | vol->port = option; |
| 1504 | break; |
| 1505 | case Opt_rsize: |
| 1506 | if (get_option_ul(args, &option)) { |
| 1507 | cERROR(1, "%s: Invalid rsize value", |
| 1508 | __func__); |
| 1509 | goto cifs_parse_mount_err; |
| 1510 | } |
| 1511 | vol->rsize = option; |
| 1512 | break; |
| 1513 | case Opt_wsize: |
| 1514 | if (get_option_ul(args, &option)) { |
| 1515 | cERROR(1, "%s: Invalid wsize value", |
| 1516 | __func__); |
| 1517 | goto cifs_parse_mount_err; |
| 1518 | } |
| 1519 | vol->wsize = option; |
| 1520 | break; |
| 1521 | case Opt_actimeo: |
| 1522 | if (get_option_ul(args, &option)) { |
| 1523 | cERROR(1, "%s: Invalid actimeo value", |
| 1524 | __func__); |
| 1525 | goto cifs_parse_mount_err; |
| 1526 | } |
| 1527 | vol->actimeo = HZ * option; |
| 1528 | if (vol->actimeo > CIFS_MAX_ACTIMEO) { |
| 1529 | cERROR(1, "CIFS: attribute cache" |
| 1530 | "timeout too large"); |
| 1531 | goto cifs_parse_mount_err; |
| 1532 | } |
| 1533 | break; |
| 1534 | |
| 1535 | /* String Arguments */ |
| 1536 | |
| 1537 | case Opt_user: |
| 1538 | string = match_strdup(args); |
| 1539 | if (string == NULL) |
| 1540 | goto out_nomem; |
| 1541 | |
| 1542 | if (!*string) { |
| 1543 | /* null user, ie. anonymous authentication */ |
| 1544 | vol->nullauth = 1; |
| 1545 | } else if (strnlen(string, MAX_USERNAME_SIZE) > |
| 1546 | MAX_USERNAME_SIZE) { |
| 1547 | printk(KERN_WARNING "CIFS: username too long\n"); |
| 1548 | goto cifs_parse_mount_err; |
| 1549 | } |
| 1550 | vol->username = kstrdup(string, GFP_KERNEL); |
| 1551 | if (!vol->username) { |
| 1552 | printk(KERN_WARNING "CIFS: no memory " |
| 1553 | "for username\n"); |
| 1554 | goto cifs_parse_mount_err; |
| 1555 | } |
| 1556 | break; |
| 1557 | case Opt_blank_pass: |
| 1558 | vol->password = NULL; |
| 1559 | break; |
| 1560 | case Opt_pass: |
| 1561 | /* passwords have to be handled differently |
| 1562 | * to allow the character used for deliminator |
| 1563 | * to be passed within them |
| 1564 | */ |
| 1565 | |
| 1566 | /* Obtain the value string */ |
| 1567 | value = strchr(data, '='); |
| 1568 | if (value != NULL) |
| 1569 | *value++ = '\0'; |
| 1570 | |
| 1571 | /* Set tmp_end to end of the string */ |
| 1572 | tmp_end = (char *) value + strlen(value); |
| 1573 | |
| 1574 | /* Check if following character is the deliminator |
| 1575 | * If yes, we have encountered a double deliminator |
| 1576 | * reset the NULL character to the deliminator |
| 1577 | */ |
| 1578 | if (tmp_end < end && tmp_end[1] == delim) |
| 1579 | tmp_end[0] = delim; |
| 1580 | |
| 1581 | /* Keep iterating until we get to a single deliminator |
| 1582 | * OR the end |
| 1583 | */ |
| 1584 | while ((tmp_end = strchr(tmp_end, delim)) != NULL && |
| 1585 | (tmp_end[1] == delim)) { |
| 1586 | tmp_end = (char *) &tmp_end[2]; |
| 1587 | } |
| 1588 | |
| 1589 | /* Reset var options to point to next element */ |
| 1590 | if (tmp_end) { |
| 1591 | tmp_end[0] = '\0'; |
| 1592 | options = (char *) &tmp_end[1]; |
| 1593 | } else |
| 1594 | /* Reached the end of the mount option string */ |
| 1595 | options = end; |
| 1596 | |
| 1597 | /* Now build new password string */ |
| 1598 | temp_len = strlen(value); |
| 1599 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
| 1600 | if (vol->password == NULL) { |
| 1601 | printk(KERN_WARNING "CIFS: no memory " |
| 1602 | "for password\n"); |
| 1603 | goto cifs_parse_mount_err; |
| 1604 | } |
| 1605 | |
| 1606 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
| 1607 | vol->password[j] = value[i]; |
| 1608 | if ((value[i] == delim) && |
| 1609 | value[i+1] == delim) |
| 1610 | /* skip the second deliminator */ |
| 1611 | i++; |
| 1612 | } |
| 1613 | vol->password[j] = '\0'; |
| 1614 | break; |
| 1615 | case Opt_ip: |
| 1616 | string = match_strdup(args); |
| 1617 | if (string == NULL) |
| 1618 | goto out_nomem; |
| 1619 | |
| 1620 | if (!*string) { |
| 1621 | vol->UNCip = NULL; |
| 1622 | } else if (strnlen(string, INET6_ADDRSTRLEN) > |
| 1623 | INET6_ADDRSTRLEN) { |
| 1624 | printk(KERN_WARNING "CIFS: ip address " |
| 1625 | "too long\n"); |
| 1626 | goto cifs_parse_mount_err; |
| 1627 | } |
| 1628 | vol->UNCip = kstrdup(string, GFP_KERNEL); |
| 1629 | if (!vol->UNCip) { |
| 1630 | printk(KERN_WARNING "CIFS: no memory " |
| 1631 | "for UNC IP\n"); |
| 1632 | goto cifs_parse_mount_err; |
| 1633 | } |
| 1634 | break; |
| 1635 | case Opt_unc: |
| 1636 | string = match_strdup(args); |
| 1637 | if (string == NULL) |
| 1638 | goto out_nomem; |
| 1639 | |
| 1640 | if (!*string) { |
| 1641 | printk(KERN_WARNING "CIFS: invalid path to " |
| 1642 | "network resource\n"); |
| 1643 | goto cifs_parse_mount_err; |
| 1644 | } |
| 1645 | |
| 1646 | temp_len = strnlen(string, 300); |
| 1647 | if (temp_len == 300) { |
| 1648 | printk(KERN_WARNING "CIFS: UNC name too long\n"); |
| 1649 | goto cifs_parse_mount_err; |
| 1650 | } |
| 1651 | |
| 1652 | if (strncmp(string, "//", 2) == 0) { |
| 1653 | vol->UNC[0] = '\\'; |
| 1654 | vol->UNC[1] = '\\'; |
| 1655 | } else if (strncmp(string, "\\\\", 2) != 0) { |
| 1656 | printk(KERN_WARNING "CIFS: UNC Path does not " |
| 1657 | "begin with // or \\\\\n"); |
| 1658 | goto cifs_parse_mount_err; |
| 1659 | } |
| 1660 | |
| 1661 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
| 1662 | if (vol->UNC == NULL) { |
| 1663 | printk(KERN_WARNING "CIFS: no memory " |
| 1664 | "for UNC\n"); |
| 1665 | goto cifs_parse_mount_err; |
| 1666 | } |
| 1667 | strcpy(vol->UNC, string); |
| 1668 | break; |
| 1669 | case Opt_domain: |
| 1670 | string = match_strdup(args); |
| 1671 | if (string == NULL) |
| 1672 | goto out_nomem; |
| 1673 | |
| 1674 | if (!*string) { |
| 1675 | printk(KERN_WARNING "CIFS: invalid domain" |
| 1676 | " name\n"); |
| 1677 | goto cifs_parse_mount_err; |
| 1678 | } else if (strnlen(string, 256) == 256) { |
| 1679 | printk(KERN_WARNING "CIFS: domain name too" |
| 1680 | " long\n"); |
| 1681 | goto cifs_parse_mount_err; |
| 1682 | } |
| 1683 | |
| 1684 | vol->domainname = kstrdup(string, GFP_KERNEL); |
| 1685 | if (!vol->domainname) { |
| 1686 | printk(KERN_WARNING "CIFS: no memory " |
| 1687 | "for domainname\n"); |
| 1688 | goto cifs_parse_mount_err; |
| 1689 | } |
| 1690 | cFYI(1, "Domain name set"); |
| 1691 | break; |
| 1692 | case Opt_srcaddr: |
| 1693 | string = match_strdup(args); |
| 1694 | if (string == NULL) |
| 1695 | goto out_nomem; |
| 1696 | |
| 1697 | if (!*string) { |
| 1698 | printk(KERN_WARNING "CIFS: srcaddr value not" |
| 1699 | " specified\n"); |
| 1700 | goto cifs_parse_mount_err; |
| 1701 | } else if (!cifs_convert_address( |
| 1702 | (struct sockaddr *)&vol->srcaddr, |
| 1703 | string, strlen(string))) { |
| 1704 | printk(KERN_WARNING "CIFS: Could not parse" |
| 1705 | " srcaddr: %s\n", string); |
| 1706 | goto cifs_parse_mount_err; |
| 1707 | } |
| 1708 | break; |
| 1709 | case Opt_prefixpath: |
| 1710 | string = match_strdup(args); |
| 1711 | if (string == NULL) |
| 1712 | goto out_nomem; |
| 1713 | |
| 1714 | if (!*string) { |
| 1715 | printk(KERN_WARNING "CIFS: Invalid path" |
| 1716 | " prefix\n"); |
| 1717 | goto cifs_parse_mount_err; |
| 1718 | } |
| 1719 | temp_len = strnlen(string, 1024); |
| 1720 | if (string[0] != '/') |
| 1721 | temp_len++; /* missing leading slash */ |
| 1722 | if (temp_len > 1024) { |
| 1723 | printk(KERN_WARNING "CIFS: prefix too long\n"); |
| 1724 | goto cifs_parse_mount_err; |
| 1725 | } |
| 1726 | |
| 1727 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
| 1728 | if (vol->prepath == NULL) { |
| 1729 | printk(KERN_WARNING "CIFS: no memory " |
| 1730 | "for path prefix\n"); |
| 1731 | goto cifs_parse_mount_err; |
| 1732 | } |
| 1733 | |
| 1734 | if (string[0] != '/') { |
| 1735 | vol->prepath[0] = '/'; |
| 1736 | strcpy(vol->prepath+1, string); |
| 1737 | } else |
| 1738 | strcpy(vol->prepath, string); |
| 1739 | |
| 1740 | break; |
| 1741 | case Opt_iocharset: |
| 1742 | string = match_strdup(args); |
| 1743 | if (string == NULL) |
| 1744 | goto out_nomem; |
| 1745 | |
| 1746 | if (!*string) { |
| 1747 | printk(KERN_WARNING "CIFS: Invalid iocharset" |
| 1748 | " specified\n"); |
| 1749 | goto cifs_parse_mount_err; |
| 1750 | } else if (strnlen(string, 1024) >= 65) { |
| 1751 | printk(KERN_WARNING "CIFS: iocharset name " |
| 1752 | "too long.\n"); |
| 1753 | goto cifs_parse_mount_err; |
| 1754 | } |
| 1755 | |
| 1756 | if (strnicmp(string, "default", 7) != 0) { |
| 1757 | vol->iocharset = kstrdup(string, |
| 1758 | GFP_KERNEL); |
| 1759 | if (!vol->iocharset) { |
| 1760 | printk(KERN_WARNING "CIFS: no memory" |
| 1761 | "for charset\n"); |
| 1762 | goto cifs_parse_mount_err; |
| 1763 | } |
| 1764 | } |
| 1765 | /* if iocharset not set then load_nls_default |
| 1766 | * is used by caller |
| 1767 | */ |
| 1768 | cFYI(1, "iocharset set to %s", string); |
| 1769 | break; |
| 1770 | case Opt_sockopt: |
| 1771 | string = match_strdup(args); |
| 1772 | if (string == NULL) |
| 1773 | goto out_nomem; |
| 1774 | |
| 1775 | if (!*string) { |
| 1776 | printk(KERN_WARNING "CIFS: No socket option" |
| 1777 | " specified\n"); |
| 1778 | goto cifs_parse_mount_err; |
| 1779 | } |
| 1780 | if (strnicmp(string, "TCP_NODELAY", 11) == 0) |
| 1781 | vol->sockopt_tcp_nodelay = 1; |
| 1782 | break; |
| 1783 | case Opt_netbiosname: |
| 1784 | string = match_strdup(args); |
| 1785 | if (string == NULL) |
| 1786 | goto out_nomem; |
| 1787 | |
| 1788 | if (!*string) { |
| 1789 | printk(KERN_WARNING "CIFS: Invalid (empty)" |
| 1790 | " netbiosname\n"); |
| 1791 | break; |
| 1792 | } |
| 1793 | |
| 1794 | memset(vol->source_rfc1001_name, 0x20, |
| 1795 | RFC1001_NAME_LEN); |
| 1796 | /* |
| 1797 | * FIXME: are there cases in which a comma can |
| 1798 | * be valid in workstation netbios name (and |
| 1799 | * need special handling)? |
| 1800 | */ |
| 1801 | for (i = 0; i < RFC1001_NAME_LEN; i++) { |
| 1802 | /* don't ucase netbiosname for user */ |
| 1803 | if (string[i] == 0) |
| 1804 | break; |
| 1805 | vol->source_rfc1001_name[i] = string[i]; |
| 1806 | } |
| 1807 | /* The string has 16th byte zero still from |
| 1808 | * set at top of the function |
| 1809 | */ |
| 1810 | if (i == RFC1001_NAME_LEN && string[i] != 0) |
| 1811 | printk(KERN_WARNING "CIFS: netbiosname" |
| 1812 | " longer than 15 truncated.\n"); |
| 1813 | |
| 1814 | break; |
| 1815 | case Opt_servern: |
| 1816 | /* servernetbiosname specified override *SMBSERVER */ |
| 1817 | string = match_strdup(args); |
| 1818 | if (string == NULL) |
| 1819 | goto out_nomem; |
| 1820 | |
| 1821 | if (!*string) { |
| 1822 | printk(KERN_WARNING "CIFS: Empty server" |
| 1823 | " netbiosname specified\n"); |
| 1824 | break; |
| 1825 | } |
| 1826 | /* last byte, type, is 0x20 for servr type */ |
| 1827 | memset(vol->target_rfc1001_name, 0x20, |
| 1828 | RFC1001_NAME_LEN_WITH_NULL); |
| 1829 | |
| 1830 | /* BB are there cases in which a comma can be |
| 1831 | valid in this workstation netbios name |
| 1832 | (and need special handling)? */ |
| 1833 | |
| 1834 | /* user or mount helper must uppercase the |
| 1835 | netbios name */ |
| 1836 | for (i = 0; i < 15; i++) { |
| 1837 | if (string[i] == 0) |
| 1838 | break; |
| 1839 | vol->target_rfc1001_name[i] = string[i]; |
| 1840 | } |
| 1841 | /* The string has 16th byte zero still from |
| 1842 | set at top of the function */ |
| 1843 | if (i == RFC1001_NAME_LEN && string[i] != 0) |
| 1844 | printk(KERN_WARNING "CIFS: server net" |
| 1845 | "biosname longer than 15 truncated.\n"); |
| 1846 | break; |
| 1847 | case Opt_ver: |
| 1848 | string = match_strdup(args); |
| 1849 | if (string == NULL) |
| 1850 | goto out_nomem; |
| 1851 | |
| 1852 | if (!*string) { |
| 1853 | cERROR(1, "no protocol version specified" |
| 1854 | " after vers= mount option"); |
| 1855 | goto cifs_parse_mount_err; |
| 1856 | } |
| 1857 | |
| 1858 | if (strnicmp(string, "cifs", 4) == 0 || |
| 1859 | strnicmp(string, "1", 1) == 0) { |
| 1860 | /* This is the default */ |
| 1861 | break; |
| 1862 | } |
| 1863 | /* For all other value, error */ |
| 1864 | printk(KERN_WARNING "CIFS: Invalid version" |
| 1865 | " specified\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1866 | goto cifs_parse_mount_err; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1867 | case Opt_sec: |
| 1868 | string = match_strdup(args); |
| 1869 | if (string == NULL) |
| 1870 | goto out_nomem; |
| 1871 | |
| 1872 | if (!*string) { |
| 1873 | printk(KERN_WARNING "CIFS: no security flavor" |
| 1874 | " specified\n"); |
| 1875 | break; |
| 1876 | } |
| 1877 | |
| 1878 | if (cifs_parse_security_flavors(string, vol) != 0) |
| 1879 | goto cifs_parse_mount_err; |
| 1880 | break; |
| 1881 | default: |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1882 | /* |
| 1883 | * An option we don't recognize. Save it off for later |
| 1884 | * if we haven't already found one |
| 1885 | */ |
| 1886 | if (!invalid) |
| 1887 | invalid = data; |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1888 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | } |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1890 | /* Free up any allocated string */ |
| 1891 | kfree(string); |
| 1892 | string = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | } |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1894 | |
Jeff Layton | d816255 | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1895 | if (!sloppy && invalid) { |
| 1896 | printk(KERN_ERR "CIFS: Unknown mount option \"%s\"\n", invalid); |
| 1897 | goto cifs_parse_mount_err; |
| 1898 | } |
| 1899 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 1900 | #ifndef CONFIG_KEYS |
| 1901 | /* Muliuser mounts require CONFIG_KEYS support */ |
| 1902 | if (vol->multiuser) { |
| 1903 | cERROR(1, "Multiuser mounts require kernels with " |
| 1904 | "CONFIG_KEYS enabled."); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1905 | goto cifs_parse_mount_err; |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1906 | } |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 1907 | #endif |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 1908 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 1909 | if (vol->UNCip == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | vol->UNCip = &vol->UNC[2]; |
| 1911 | |
Jeff Layton | 9b9d6b24 | 2009-07-31 06:56:09 -0400 | [diff] [blame] | 1912 | if (uid_specified) |
| 1913 | vol->override_uid = override_uid; |
| 1914 | else if (override_uid == 1) |
| 1915 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " |
| 1916 | "specified with no uid= option.\n"); |
| 1917 | |
| 1918 | if (gid_specified) |
| 1919 | vol->override_gid = override_gid; |
| 1920 | else if (override_gid == 1) |
| 1921 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " |
| 1922 | "specified with no gid= option.\n"); |
| 1923 | |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1924 | kfree(mountdata_copy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | return 0; |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1926 | |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1927 | out_nomem: |
| 1928 | printk(KERN_WARNING "Could not allocate temporary buffer\n"); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1929 | cifs_parse_mount_err: |
Sachin Prabhu | 8830d7e | 2012-03-23 14:40:56 -0400 | [diff] [blame] | 1930 | kfree(string); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 1931 | kfree(mountdata_copy); |
| 1932 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | } |
| 1934 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1935 | /** Returns true if srcaddr isn't specified and rhs isn't |
| 1936 | * specified, or if srcaddr is specified and |
| 1937 | * matches the IP address of the rhs argument. |
| 1938 | */ |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 1939 | static bool |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1940 | srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs) |
| 1941 | { |
| 1942 | switch (srcaddr->sa_family) { |
| 1943 | case AF_UNSPEC: |
| 1944 | return (rhs->sa_family == AF_UNSPEC); |
| 1945 | case AF_INET: { |
| 1946 | struct sockaddr_in *saddr4 = (struct sockaddr_in *)srcaddr; |
| 1947 | struct sockaddr_in *vaddr4 = (struct sockaddr_in *)rhs; |
| 1948 | return (saddr4->sin_addr.s_addr == vaddr4->sin_addr.s_addr); |
| 1949 | } |
| 1950 | case AF_INET6: { |
| 1951 | struct sockaddr_in6 *saddr6 = (struct sockaddr_in6 *)srcaddr; |
| 1952 | struct sockaddr_in6 *vaddr6 = (struct sockaddr_in6 *)&rhs; |
| 1953 | return ipv6_addr_equal(&saddr6->sin6_addr, &vaddr6->sin6_addr); |
| 1954 | } |
| 1955 | default: |
| 1956 | WARN_ON(1); |
| 1957 | return false; /* don't expect to be here */ |
| 1958 | } |
| 1959 | } |
| 1960 | |
Pavel Shilovsky | 4b88613 | 2010-12-13 22:18:07 +0300 | [diff] [blame] | 1961 | /* |
| 1962 | * If no port is specified in addr structure, we try to match with 445 port |
| 1963 | * and if it fails - with 139 ports. It should be called only if address |
| 1964 | * families of server and addr are equal. |
| 1965 | */ |
| 1966 | static bool |
| 1967 | match_port(struct TCP_Server_Info *server, struct sockaddr *addr) |
| 1968 | { |
Steve French | 6da9791 | 2011-03-13 18:55:55 +0000 | [diff] [blame] | 1969 | __be16 port, *sport; |
Pavel Shilovsky | 4b88613 | 2010-12-13 22:18:07 +0300 | [diff] [blame] | 1970 | |
| 1971 | switch (addr->sa_family) { |
| 1972 | case AF_INET: |
| 1973 | sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port; |
| 1974 | port = ((struct sockaddr_in *) addr)->sin_port; |
| 1975 | break; |
| 1976 | case AF_INET6: |
| 1977 | sport = &((struct sockaddr_in6 *) &server->dstaddr)->sin6_port; |
| 1978 | port = ((struct sockaddr_in6 *) addr)->sin6_port; |
| 1979 | break; |
| 1980 | default: |
| 1981 | WARN_ON(1); |
| 1982 | return false; |
| 1983 | } |
| 1984 | |
| 1985 | if (!port) { |
| 1986 | port = htons(CIFS_PORT); |
| 1987 | if (port == *sport) |
| 1988 | return true; |
| 1989 | |
| 1990 | port = htons(RFC1001_PORT); |
| 1991 | } |
| 1992 | |
| 1993 | return port == *sport; |
| 1994 | } |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 1995 | |
| 1996 | static bool |
| 1997 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr, |
| 1998 | struct sockaddr *srcaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | { |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2000 | switch (addr->sa_family) { |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2001 | case AF_INET: { |
| 2002 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; |
| 2003 | struct sockaddr_in *srv_addr4 = |
| 2004 | (struct sockaddr_in *)&server->dstaddr; |
| 2005 | |
| 2006 | if (addr4->sin_addr.s_addr != srv_addr4->sin_addr.s_addr) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2007 | return false; |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2008 | break; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2009 | } |
| 2010 | case AF_INET6: { |
| 2011 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; |
| 2012 | struct sockaddr_in6 *srv_addr6 = |
| 2013 | (struct sockaddr_in6 *)&server->dstaddr; |
| 2014 | |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2015 | if (!ipv6_addr_equal(&addr6->sin6_addr, |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2016 | &srv_addr6->sin6_addr)) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2017 | return false; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2018 | if (addr6->sin6_scope_id != srv_addr6->sin6_scope_id) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2019 | return false; |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2020 | break; |
| 2021 | } |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2022 | default: |
| 2023 | WARN_ON(1); |
| 2024 | return false; /* don't expect to be here */ |
| 2025 | } |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2026 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 2027 | if (!srcip_matches(srcaddr, (struct sockaddr *)&server->srcaddr)) |
| 2028 | return false; |
| 2029 | |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2030 | return true; |
| 2031 | } |
| 2032 | |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2033 | static bool |
| 2034 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) |
| 2035 | { |
| 2036 | unsigned int secFlags; |
| 2037 | |
| 2038 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) |
| 2039 | secFlags = vol->secFlg; |
| 2040 | else |
| 2041 | secFlags = global_secflags | vol->secFlg; |
| 2042 | |
| 2043 | switch (server->secType) { |
| 2044 | case LANMAN: |
| 2045 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) |
| 2046 | return false; |
| 2047 | break; |
| 2048 | case NTLMv2: |
| 2049 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) |
| 2050 | return false; |
| 2051 | break; |
| 2052 | case NTLM: |
| 2053 | if (!(secFlags & CIFSSEC_MAY_NTLM)) |
| 2054 | return false; |
| 2055 | break; |
| 2056 | case Kerberos: |
| 2057 | if (!(secFlags & CIFSSEC_MAY_KRB5)) |
| 2058 | return false; |
| 2059 | break; |
| 2060 | case RawNTLMSSP: |
| 2061 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) |
| 2062 | return false; |
| 2063 | break; |
| 2064 | default: |
| 2065 | /* shouldn't happen */ |
| 2066 | return false; |
| 2067 | } |
| 2068 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2069 | /* now check if signing mode is acceptable */ |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2070 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2071 | (server->sec_mode & SECMODE_SIGN_REQUIRED)) |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2072 | return false; |
| 2073 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2074 | (server->sec_mode & |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2075 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) |
| 2076 | return false; |
| 2077 | |
| 2078 | return true; |
| 2079 | } |
| 2080 | |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2081 | static int match_server(struct TCP_Server_Info *server, struct sockaddr *addr, |
| 2082 | struct smb_vol *vol) |
| 2083 | { |
| 2084 | if (!net_eq(cifs_net_ns(server), current->nsproxy->net_ns)) |
| 2085 | return 0; |
| 2086 | |
| 2087 | if (!match_address(server, addr, |
| 2088 | (struct sockaddr *)&vol->srcaddr)) |
| 2089 | return 0; |
| 2090 | |
| 2091 | if (!match_port(server, addr)) |
| 2092 | return 0; |
| 2093 | |
| 2094 | if (!match_security(server, vol)) |
| 2095 | return 0; |
| 2096 | |
| 2097 | return 1; |
| 2098 | } |
| 2099 | |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2100 | static struct TCP_Server_Info * |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2101 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2102 | { |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2103 | struct TCP_Server_Info *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2105 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 4515148 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2106 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2107 | if (!match_server(server, addr, vol)) |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2108 | continue; |
| 2109 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2110 | ++server->srv_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2111 | spin_unlock(&cifs_tcp_ses_lock); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2112 | cFYI(1, "Existing tcp session with server found"); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2113 | return server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2115 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | return NULL; |
| 2117 | } |
| 2118 | |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2119 | static void |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2120 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | { |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2122 | struct task_struct *task; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2124 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2125 | if (--server->srv_count > 0) { |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2126 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2127 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | } |
Steve French | dea570e0 | 2008-05-06 22:05:51 +0000 | [diff] [blame] | 2129 | |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 2130 | put_net(cifs_net_ns(server)); |
| 2131 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2132 | list_del_init(&server->tcp_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2133 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2134 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 2135 | cancel_delayed_work_sync(&server->echo); |
| 2136 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2137 | spin_lock(&GlobalMid_Lock); |
| 2138 | server->tcpStatus = CifsExiting; |
| 2139 | spin_unlock(&GlobalMid_Lock); |
| 2140 | |
Shirish Pargaonkar | d2b9152 | 2010-10-21 14:25:08 -0500 | [diff] [blame] | 2141 | cifs_crypto_shash_release(server); |
Suresh Jayaraman | 488f1d2d | 2010-07-05 18:12:15 +0530 | [diff] [blame] | 2142 | cifs_fscache_release_client_cookie(server); |
| 2143 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 2144 | kfree(server->session_key.response); |
| 2145 | server->session_key.response = NULL; |
| 2146 | server->session_key.len = 0; |
| 2147 | |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 2148 | task = xchg(&server->tsk, NULL); |
| 2149 | if (task) |
| 2150 | force_sig(SIGKILL, task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2151 | } |
| 2152 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2153 | static struct TCP_Server_Info * |
| 2154 | cifs_get_tcp_session(struct smb_vol *volume_info) |
| 2155 | { |
| 2156 | struct TCP_Server_Info *tcp_ses = NULL; |
Jeff Layton | a9ac49d | 2009-01-22 14:43:21 -0500 | [diff] [blame] | 2157 | struct sockaddr_storage addr; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2158 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
| 2159 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; |
| 2160 | int rc; |
| 2161 | |
Jeff Layton | a9ac49d | 2009-01-22 14:43:21 -0500 | [diff] [blame] | 2162 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2163 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2164 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
Jeff Layton | 1e68b2b | 2009-06-11 10:27:30 -0400 | [diff] [blame] | 2165 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2166 | if (volume_info->UNCip && volume_info->UNC) { |
Jeff Layton | 50d9716 | 2010-07-06 20:43:01 -0400 | [diff] [blame] | 2167 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
| 2168 | volume_info->UNCip, |
David Howells | 67b7626 | 2010-07-22 18:33:01 +0100 | [diff] [blame] | 2169 | strlen(volume_info->UNCip), |
Jeff Layton | 50d9716 | 2010-07-06 20:43:01 -0400 | [diff] [blame] | 2170 | volume_info->port); |
Jeff Layton | 1e68b2b | 2009-06-11 10:27:30 -0400 | [diff] [blame] | 2171 | if (!rc) { |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2172 | /* we failed translating address */ |
| 2173 | rc = -EINVAL; |
| 2174 | goto out_err; |
| 2175 | } |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2176 | } else if (volume_info->UNCip) { |
| 2177 | /* BB using ip addr as tcp_ses name to connect to the |
| 2178 | DFS root below */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2179 | cERROR(1, "Connecting to DFS root not implemented yet"); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2180 | rc = -EINVAL; |
| 2181 | goto out_err; |
| 2182 | } else /* which tcp_sess DFS root would we conect to */ { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2183 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
| 2184 | "unc=//192.168.1.100/public) specified"); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2185 | rc = -EINVAL; |
| 2186 | goto out_err; |
| 2187 | } |
| 2188 | |
| 2189 | /* see if we already have a matching tcp_ses */ |
Jeff Layton | daf5b0b | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2190 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2191 | if (tcp_ses) |
| 2192 | return tcp_ses; |
| 2193 | |
| 2194 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); |
| 2195 | if (!tcp_ses) { |
| 2196 | rc = -ENOMEM; |
| 2197 | goto out_err; |
| 2198 | } |
| 2199 | |
Shirish Pargaonkar | d2b9152 | 2010-10-21 14:25:08 -0500 | [diff] [blame] | 2200 | rc = cifs_crypto_shash_allocate(tcp_ses); |
| 2201 | if (rc) { |
| 2202 | cERROR(1, "could not setup hash structures rc %d", rc); |
| 2203 | goto out_err; |
| 2204 | } |
| 2205 | |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 2206 | cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns)); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2207 | tcp_ses->hostname = extract_hostname(volume_info->UNC); |
| 2208 | if (IS_ERR(tcp_ses->hostname)) { |
| 2209 | rc = PTR_ERR(tcp_ses->hostname); |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 2210 | goto out_err_crypto_release; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2211 | } |
| 2212 | |
| 2213 | tcp_ses->noblocksnd = volume_info->noblocksnd; |
| 2214 | tcp_ses->noautotune = volume_info->noautotune; |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 2215 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
Pavel Shilovsky | fc40f9c | 2012-02-17 17:09:12 +0300 | [diff] [blame] | 2216 | tcp_ses->in_flight = 0; |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 2217 | tcp_ses->credits = 1; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2218 | init_waitqueue_head(&tcp_ses->response_q); |
| 2219 | init_waitqueue_head(&tcp_ses->request_q); |
| 2220 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); |
| 2221 | mutex_init(&tcp_ses->srv_mutex); |
| 2222 | memcpy(tcp_ses->workstation_RFC1001_name, |
| 2223 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); |
| 2224 | memcpy(tcp_ses->server_RFC1001_name, |
| 2225 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 2226 | tcp_ses->session_estab = false; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2227 | tcp_ses->sequence_number = 0; |
Steve French | fda3594 | 2011-01-20 18:06:34 +0000 | [diff] [blame] | 2228 | tcp_ses->lstrp = jiffies; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2229 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); |
| 2230 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 2231 | INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2232 | |
| 2233 | /* |
| 2234 | * at this point we are the only ones with the pointer |
| 2235 | * to the struct since the kernel thread not created yet |
| 2236 | * no need to spinlock this init of tcpStatus or srv_count |
| 2237 | */ |
| 2238 | tcp_ses->tcpStatus = CifsNew; |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 2239 | memcpy(&tcp_ses->srcaddr, &volume_info->srcaddr, |
| 2240 | sizeof(tcp_ses->srcaddr)); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2241 | ++tcp_ses->srv_count; |
| 2242 | |
Jeff Layton | a9ac49d | 2009-01-22 14:43:21 -0500 | [diff] [blame] | 2243 | if (addr.ss_family == AF_INET6) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2244 | cFYI(1, "attempting ipv6 connect"); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2245 | /* BB should we allow ipv6 on port 139? */ |
| 2246 | /* other OS never observed in Wild doing 139 with v6 */ |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2247 | memcpy(&tcp_ses->dstaddr, sin_server6, |
| 2248 | sizeof(struct sockaddr_in6)); |
| 2249 | } else |
| 2250 | memcpy(&tcp_ses->dstaddr, sin_server, |
| 2251 | sizeof(struct sockaddr_in)); |
| 2252 | |
| 2253 | rc = ip_connect(tcp_ses); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2254 | if (rc < 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2255 | cERROR(1, "Error connecting to socket. Aborting operation"); |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 2256 | goto out_err_crypto_release; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2257 | } |
| 2258 | |
| 2259 | /* |
| 2260 | * since we're in a cifs function already, we know that |
| 2261 | * this will succeed. No need for try_module_get(). |
| 2262 | */ |
| 2263 | __module_get(THIS_MODULE); |
Al Viro | 7c97c20 | 2011-06-21 08:51:28 -0400 | [diff] [blame] | 2264 | tcp_ses->tsk = kthread_run(cifs_demultiplex_thread, |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2265 | tcp_ses, "cifsd"); |
| 2266 | if (IS_ERR(tcp_ses->tsk)) { |
| 2267 | rc = PTR_ERR(tcp_ses->tsk); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2268 | cERROR(1, "error %d create cifsd thread", rc); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2269 | module_put(THIS_MODULE); |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 2270 | goto out_err_crypto_release; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2271 | } |
Steve French | fd88ce9 | 2011-04-12 01:01:14 +0000 | [diff] [blame] | 2272 | tcp_ses->tcpStatus = CifsNeedNegotiate; |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2273 | |
| 2274 | /* thread spawned, put it on the list */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2275 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2276 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2277 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2278 | |
Suresh Jayaraman | 488f1d2d | 2010-07-05 18:12:15 +0530 | [diff] [blame] | 2279 | cifs_fscache_get_client_cookie(tcp_ses); |
| 2280 | |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 2281 | /* queue echo request delayed work */ |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 2282 | queue_delayed_work(cifsiod_wq, &tcp_ses->echo, SMB_ECHO_INTERVAL); |
Jeff Layton | c74093b | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 2283 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2284 | return tcp_ses; |
| 2285 | |
Shirish Pargaonkar | f7c5445 | 2010-10-26 18:10:24 -0500 | [diff] [blame] | 2286 | out_err_crypto_release: |
Shirish Pargaonkar | d2b9152 | 2010-10-21 14:25:08 -0500 | [diff] [blame] | 2287 | cifs_crypto_shash_release(tcp_ses); |
| 2288 | |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 2289 | put_net(cifs_net_ns(tcp_ses)); |
| 2290 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2291 | out_err: |
| 2292 | if (tcp_ses) { |
Steve French | 8347a5c | 2009-10-06 18:31:29 +0000 | [diff] [blame] | 2293 | if (!IS_ERR(tcp_ses->hostname)) |
| 2294 | kfree(tcp_ses->hostname); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 2295 | if (tcp_ses->ssocket) |
| 2296 | sock_release(tcp_ses->ssocket); |
| 2297 | kfree(tcp_ses); |
| 2298 | } |
| 2299 | return ERR_PTR(rc); |
| 2300 | } |
| 2301 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2302 | static int match_session(struct cifs_ses *ses, struct smb_vol *vol) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2303 | { |
| 2304 | switch (ses->server->secType) { |
| 2305 | case Kerberos: |
| 2306 | if (vol->cred_uid != ses->cred_uid) |
| 2307 | return 0; |
| 2308 | break; |
| 2309 | default: |
Jeff Layton | 04febab | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2310 | /* NULL username means anonymous session */ |
| 2311 | if (ses->user_name == NULL) { |
| 2312 | if (!vol->nullauth) |
| 2313 | return 0; |
| 2314 | break; |
| 2315 | } |
| 2316 | |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2317 | /* anything else takes username/password */ |
Jeff Layton | 04febab | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2318 | if (strncmp(ses->user_name, |
| 2319 | vol->username ? vol->username : "", |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2320 | MAX_USERNAME_SIZE)) |
| 2321 | return 0; |
| 2322 | if (strlen(vol->username) != 0 && |
| 2323 | ses->password != NULL && |
| 2324 | strncmp(ses->password, |
| 2325 | vol->password ? vol->password : "", |
| 2326 | MAX_PASSWORD_SIZE)) |
| 2327 | return 0; |
| 2328 | } |
| 2329 | return 1; |
| 2330 | } |
| 2331 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2332 | static struct cifs_ses * |
Jeff Layton | 4ff67b7 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2333 | 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] | 2334 | { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2335 | struct cifs_ses *ses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2336 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2337 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 4ff67b7 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2338 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2339 | if (!match_session(ses, vol)) |
| 2340 | continue; |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2341 | ++ses->ses_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2342 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2343 | return ses; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2345 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | return NULL; |
| 2347 | } |
| 2348 | |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2349 | static void |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2350 | cifs_put_smb_ses(struct cifs_ses *ses) |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2351 | { |
| 2352 | int xid; |
| 2353 | struct TCP_Server_Info *server = ses->server; |
| 2354 | |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2355 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2356 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2357 | if (--ses->ses_count > 0) { |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2358 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2359 | return; |
| 2360 | } |
| 2361 | |
| 2362 | list_del_init(&ses->smb_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2363 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 14fbf50 | 2008-11-14 13:53:46 -0500 | [diff] [blame] | 2364 | |
| 2365 | if (ses->status == CifsGood) { |
| 2366 | xid = GetXid(); |
| 2367 | CIFSSMBLogoff(xid, ses); |
| 2368 | _FreeXid(xid); |
| 2369 | } |
| 2370 | sesInfoFree(ses); |
| 2371 | cifs_put_tcp_session(server); |
| 2372 | } |
| 2373 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2374 | #ifdef CONFIG_KEYS |
| 2375 | |
| 2376 | /* strlen("cifs:a:") + INET6_ADDRSTRLEN + 1 */ |
| 2377 | #define CIFSCREDS_DESC_SIZE (7 + INET6_ADDRSTRLEN + 1) |
| 2378 | |
| 2379 | /* Populate username and pw fields from keyring if possible */ |
| 2380 | static int |
| 2381 | cifs_set_cifscreds(struct smb_vol *vol, struct cifs_ses *ses) |
| 2382 | { |
| 2383 | int rc = 0; |
| 2384 | char *desc, *delim, *payload; |
| 2385 | ssize_t len; |
| 2386 | struct key *key; |
| 2387 | struct TCP_Server_Info *server = ses->server; |
| 2388 | struct sockaddr_in *sa; |
| 2389 | struct sockaddr_in6 *sa6; |
| 2390 | struct user_key_payload *upayload; |
| 2391 | |
| 2392 | desc = kmalloc(CIFSCREDS_DESC_SIZE, GFP_KERNEL); |
| 2393 | if (!desc) |
| 2394 | return -ENOMEM; |
| 2395 | |
| 2396 | /* try to find an address key first */ |
| 2397 | switch (server->dstaddr.ss_family) { |
| 2398 | case AF_INET: |
| 2399 | sa = (struct sockaddr_in *)&server->dstaddr; |
| 2400 | sprintf(desc, "cifs:a:%pI4", &sa->sin_addr.s_addr); |
| 2401 | break; |
| 2402 | case AF_INET6: |
| 2403 | sa6 = (struct sockaddr_in6 *)&server->dstaddr; |
| 2404 | sprintf(desc, "cifs:a:%pI6c", &sa6->sin6_addr.s6_addr); |
| 2405 | break; |
| 2406 | default: |
| 2407 | cFYI(1, "Bad ss_family (%hu)", server->dstaddr.ss_family); |
| 2408 | rc = -EINVAL; |
| 2409 | goto out_err; |
| 2410 | } |
| 2411 | |
| 2412 | cFYI(1, "%s: desc=%s", __func__, desc); |
| 2413 | key = request_key(&key_type_logon, desc, ""); |
| 2414 | if (IS_ERR(key)) { |
| 2415 | if (!ses->domainName) { |
| 2416 | cFYI(1, "domainName is NULL"); |
| 2417 | rc = PTR_ERR(key); |
| 2418 | goto out_err; |
| 2419 | } |
| 2420 | |
| 2421 | /* didn't work, try to find a domain key */ |
| 2422 | sprintf(desc, "cifs:d:%s", ses->domainName); |
| 2423 | cFYI(1, "%s: desc=%s", __func__, desc); |
| 2424 | key = request_key(&key_type_logon, desc, ""); |
| 2425 | if (IS_ERR(key)) { |
| 2426 | rc = PTR_ERR(key); |
| 2427 | goto out_err; |
| 2428 | } |
| 2429 | } |
| 2430 | |
| 2431 | down_read(&key->sem); |
| 2432 | upayload = key->payload.data; |
| 2433 | if (IS_ERR_OR_NULL(upayload)) { |
Jeff Layton | 4edc53c | 2012-02-07 06:30:51 -0500 | [diff] [blame] | 2434 | rc = upayload ? PTR_ERR(upayload) : -EINVAL; |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2435 | goto out_key_put; |
| 2436 | } |
| 2437 | |
| 2438 | /* find first : in payload */ |
| 2439 | payload = (char *)upayload->data; |
| 2440 | delim = strnchr(payload, upayload->datalen, ':'); |
| 2441 | cFYI(1, "payload=%s", payload); |
| 2442 | if (!delim) { |
| 2443 | cFYI(1, "Unable to find ':' in payload (datalen=%d)", |
| 2444 | upayload->datalen); |
| 2445 | rc = -EINVAL; |
| 2446 | goto out_key_put; |
| 2447 | } |
| 2448 | |
| 2449 | len = delim - payload; |
| 2450 | if (len > MAX_USERNAME_SIZE || len <= 0) { |
Randy Dunlap | 000f9bb | 2012-01-30 19:50:01 -0800 | [diff] [blame] | 2451 | cFYI(1, "Bad value from username search (len=%zd)", len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2452 | rc = -EINVAL; |
| 2453 | goto out_key_put; |
| 2454 | } |
| 2455 | |
| 2456 | vol->username = kstrndup(payload, len, GFP_KERNEL); |
| 2457 | if (!vol->username) { |
Randy Dunlap | 000f9bb | 2012-01-30 19:50:01 -0800 | [diff] [blame] | 2458 | cFYI(1, "Unable to allocate %zd bytes for username", len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2459 | rc = -ENOMEM; |
| 2460 | goto out_key_put; |
| 2461 | } |
| 2462 | cFYI(1, "%s: username=%s", __func__, vol->username); |
| 2463 | |
| 2464 | len = key->datalen - (len + 1); |
| 2465 | if (len > MAX_PASSWORD_SIZE || len <= 0) { |
Randy Dunlap | 000f9bb | 2012-01-30 19:50:01 -0800 | [diff] [blame] | 2466 | cFYI(1, "Bad len for password search (len=%zd)", len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2467 | rc = -EINVAL; |
| 2468 | kfree(vol->username); |
| 2469 | vol->username = NULL; |
| 2470 | goto out_key_put; |
| 2471 | } |
| 2472 | |
| 2473 | ++delim; |
| 2474 | vol->password = kstrndup(delim, len, GFP_KERNEL); |
| 2475 | if (!vol->password) { |
Randy Dunlap | 000f9bb | 2012-01-30 19:50:01 -0800 | [diff] [blame] | 2476 | cFYI(1, "Unable to allocate %zd bytes for password", len); |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 2477 | rc = -ENOMEM; |
| 2478 | kfree(vol->username); |
| 2479 | vol->username = NULL; |
| 2480 | goto out_key_put; |
| 2481 | } |
| 2482 | |
| 2483 | out_key_put: |
| 2484 | up_read(&key->sem); |
| 2485 | key_put(key); |
| 2486 | out_err: |
| 2487 | kfree(desc); |
| 2488 | cFYI(1, "%s: returning %d", __func__, rc); |
| 2489 | return rc; |
| 2490 | } |
| 2491 | #else /* ! CONFIG_KEYS */ |
| 2492 | static inline int |
| 2493 | cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)), |
| 2494 | struct cifs_ses *ses __attribute__((unused))) |
| 2495 | { |
| 2496 | return -ENOSYS; |
| 2497 | } |
| 2498 | #endif /* CONFIG_KEYS */ |
| 2499 | |
Steve French | d9b9420 | 2011-04-12 01:24:57 +0000 | [diff] [blame] | 2500 | static bool warned_on_ntlm; /* globals init to false automatically */ |
| 2501 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2502 | static struct cifs_ses * |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2503 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) |
| 2504 | { |
| 2505 | int rc = -ENOMEM, xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2506 | struct cifs_ses *ses; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2507 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
| 2508 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2509 | |
| 2510 | xid = GetXid(); |
| 2511 | |
Jeff Layton | 4ff67b7 | 2010-07-06 20:43:02 -0400 | [diff] [blame] | 2512 | ses = cifs_find_smb_ses(server, volume_info); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2513 | if (ses) { |
| 2514 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); |
| 2515 | |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2516 | mutex_lock(&ses->session_mutex); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 2517 | rc = cifs_negotiate_protocol(xid, ses); |
| 2518 | if (rc) { |
| 2519 | mutex_unlock(&ses->session_mutex); |
| 2520 | /* problem -- put our ses reference */ |
| 2521 | cifs_put_smb_ses(ses); |
| 2522 | FreeXid(xid); |
| 2523 | return ERR_PTR(rc); |
| 2524 | } |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2525 | if (ses->need_reconnect) { |
| 2526 | cFYI(1, "Session needs reconnect"); |
| 2527 | rc = cifs_setup_session(xid, ses, |
| 2528 | volume_info->local_nls); |
| 2529 | if (rc) { |
| 2530 | mutex_unlock(&ses->session_mutex); |
| 2531 | /* problem -- put our reference */ |
| 2532 | cifs_put_smb_ses(ses); |
| 2533 | FreeXid(xid); |
| 2534 | return ERR_PTR(rc); |
| 2535 | } |
| 2536 | } |
| 2537 | mutex_unlock(&ses->session_mutex); |
Jeff Layton | 460cf34 | 2010-09-14 11:38:24 -0400 | [diff] [blame] | 2538 | |
| 2539 | /* existing SMB ses has a server reference already */ |
| 2540 | cifs_put_tcp_session(server); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2541 | FreeXid(xid); |
| 2542 | return ses; |
| 2543 | } |
| 2544 | |
| 2545 | cFYI(1, "Existing smb sess not found"); |
| 2546 | ses = sesInfoAlloc(); |
| 2547 | if (ses == NULL) |
| 2548 | goto get_ses_fail; |
| 2549 | |
| 2550 | /* new SMB session uses our server ref */ |
| 2551 | ses->server = server; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2552 | if (server->dstaddr.ss_family == AF_INET6) |
| 2553 | sprintf(ses->serverName, "%pI6", &addr6->sin6_addr); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2554 | else |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2555 | sprintf(ses->serverName, "%pI4", &addr->sin_addr); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2556 | |
Steve French | 8727c8a | 2011-02-25 01:11:56 -0600 | [diff] [blame] | 2557 | if (volume_info->username) { |
| 2558 | ses->user_name = kstrdup(volume_info->username, GFP_KERNEL); |
| 2559 | if (!ses->user_name) |
| 2560 | goto get_ses_fail; |
| 2561 | } |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2562 | |
| 2563 | /* volume_info->password freed at unmount */ |
| 2564 | if (volume_info->password) { |
| 2565 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); |
| 2566 | if (!ses->password) |
| 2567 | goto get_ses_fail; |
| 2568 | } |
| 2569 | if (volume_info->domainname) { |
Shirish Pargaonkar | d3686d5 | 2010-10-28 09:53:07 -0500 | [diff] [blame] | 2570 | ses->domainName = kstrdup(volume_info->domainname, GFP_KERNEL); |
| 2571 | if (!ses->domainName) |
| 2572 | goto get_ses_fail; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2573 | } |
Jeff Layton | 3e4b3e1 | 2010-07-19 18:00:17 -0400 | [diff] [blame] | 2574 | ses->cred_uid = volume_info->cred_uid; |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2575 | ses->linux_uid = volume_info->linux_uid; |
Steve French | d9b9420 | 2011-04-12 01:24:57 +0000 | [diff] [blame] | 2576 | |
| 2577 | /* ntlmv2 is much stronger than ntlm security, and has been broadly |
| 2578 | supported for many years, time to update default security mechanism */ |
| 2579 | if ((volume_info->secFlg == 0) && warned_on_ntlm == false) { |
| 2580 | warned_on_ntlm = true; |
| 2581 | cERROR(1, "default security mechanism requested. The default " |
| 2582 | "security mechanism will be upgraded from ntlm to " |
Steve French | 225de11 | 2012-01-03 23:08:24 -0600 | [diff] [blame] | 2583 | "ntlmv2 in kernel release 3.3"); |
Steve French | d9b9420 | 2011-04-12 01:24:57 +0000 | [diff] [blame] | 2584 | } |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2585 | ses->overrideSecFlg = volume_info->secFlg; |
| 2586 | |
| 2587 | mutex_lock(&ses->session_mutex); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 2588 | rc = cifs_negotiate_protocol(xid, ses); |
| 2589 | if (!rc) |
| 2590 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2591 | mutex_unlock(&ses->session_mutex); |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 2592 | if (rc) |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2593 | goto get_ses_fail; |
| 2594 | |
| 2595 | /* success, put it on the list */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2596 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2597 | list_add(&ses->smb_ses_list, &server->smb_ses_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2598 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 2599 | |
| 2600 | FreeXid(xid); |
| 2601 | return ses; |
| 2602 | |
| 2603 | get_ses_fail: |
| 2604 | sesInfoFree(ses); |
| 2605 | FreeXid(xid); |
| 2606 | return ERR_PTR(rc); |
| 2607 | } |
| 2608 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2609 | static int match_tcon(struct cifs_tcon *tcon, const char *unc) |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2610 | { |
| 2611 | if (tcon->tidStatus == CifsExiting) |
| 2612 | return 0; |
| 2613 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) |
| 2614 | return 0; |
| 2615 | return 1; |
| 2616 | } |
| 2617 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2618 | static struct cifs_tcon * |
| 2619 | cifs_find_tcon(struct cifs_ses *ses, const char *unc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | { |
| 2621 | struct list_head *tmp; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2622 | struct cifs_tcon *tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2623 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2624 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2625 | list_for_each(tmp, &ses->tcon_list) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2626 | tcon = list_entry(tmp, struct cifs_tcon, tcon_list); |
Pavel Shilovsky | 37bb04e | 2011-05-05 09:55:11 +0000 | [diff] [blame] | 2627 | if (!match_tcon(tcon, unc)) |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2628 | continue; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2629 | ++tcon->tc_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2630 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2631 | return tcon; |
| 2632 | } |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2633 | spin_unlock(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2634 | return NULL; |
| 2635 | } |
| 2636 | |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2637 | static void |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2638 | cifs_put_tcon(struct cifs_tcon *tcon) |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2639 | { |
| 2640 | int xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2641 | struct cifs_ses *ses = tcon->ses; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2642 | |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2643 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2644 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2645 | if (--tcon->tc_count > 0) { |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2646 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2647 | return; |
| 2648 | } |
| 2649 | |
| 2650 | list_del_init(&tcon->tcon_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2651 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2652 | |
| 2653 | xid = GetXid(); |
| 2654 | CIFSSMBTDis(xid, tcon); |
| 2655 | _FreeXid(xid); |
| 2656 | |
Suresh Jayaraman | d03382c | 2010-07-05 18:12:27 +0530 | [diff] [blame] | 2657 | cifs_fscache_release_super_cookie(tcon); |
Steve French | 9f84159 | 2010-07-23 20:37:53 +0000 | [diff] [blame] | 2658 | tconInfoFree(tcon); |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 2659 | cifs_put_smb_ses(ses); |
| 2660 | } |
| 2661 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2662 | static struct cifs_tcon * |
| 2663 | cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info) |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2664 | { |
| 2665 | int rc, xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2666 | struct cifs_tcon *tcon; |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2667 | |
| 2668 | tcon = cifs_find_tcon(ses, volume_info->UNC); |
| 2669 | if (tcon) { |
| 2670 | cFYI(1, "Found match on UNC path"); |
| 2671 | /* existing tcon already has a reference */ |
| 2672 | cifs_put_smb_ses(ses); |
| 2673 | if (tcon->seal != volume_info->seal) |
| 2674 | cERROR(1, "transport encryption setting " |
| 2675 | "conflicts with existing tid"); |
| 2676 | return tcon; |
| 2677 | } |
| 2678 | |
| 2679 | tcon = tconInfoAlloc(); |
| 2680 | if (tcon == NULL) { |
| 2681 | rc = -ENOMEM; |
| 2682 | goto out_fail; |
| 2683 | } |
| 2684 | |
| 2685 | tcon->ses = ses; |
| 2686 | if (volume_info->password) { |
| 2687 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); |
| 2688 | if (!tcon->password) { |
| 2689 | rc = -ENOMEM; |
| 2690 | goto out_fail; |
| 2691 | } |
| 2692 | } |
| 2693 | |
| 2694 | if (strchr(volume_info->UNC + 3, '\\') == NULL |
| 2695 | && strchr(volume_info->UNC + 3, '/') == NULL) { |
| 2696 | cERROR(1, "Missing share name"); |
| 2697 | rc = -ENODEV; |
| 2698 | goto out_fail; |
| 2699 | } |
| 2700 | |
| 2701 | /* BB Do we need to wrap session_mutex around |
| 2702 | * this TCon call and Unix SetFS as |
| 2703 | * we do on SessSetup and reconnect? */ |
| 2704 | xid = GetXid(); |
| 2705 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); |
| 2706 | FreeXid(xid); |
| 2707 | cFYI(1, "CIFS Tcon rc = %d", rc); |
| 2708 | if (rc) |
| 2709 | goto out_fail; |
| 2710 | |
| 2711 | if (volume_info->nodfs) { |
| 2712 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; |
| 2713 | cFYI(1, "DFS disabled (%d)", tcon->Flags); |
| 2714 | } |
| 2715 | tcon->seal = volume_info->seal; |
| 2716 | /* we can have only one retry value for a connection |
| 2717 | to a share so for resources mounted more than once |
| 2718 | to the same server share the last value passed in |
| 2719 | for the retry flag is used */ |
| 2720 | tcon->retry = volume_info->retry; |
| 2721 | tcon->nocase = volume_info->nocase; |
| 2722 | tcon->local_lease = volume_info->local_lease; |
| 2723 | |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2724 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2725 | list_add(&tcon->tcon_list, &ses->tcon_list); |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 2726 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2727 | |
Suresh Jayaraman | d03382c | 2010-07-05 18:12:27 +0530 | [diff] [blame] | 2728 | cifs_fscache_get_super_cookie(tcon); |
| 2729 | |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2730 | return tcon; |
| 2731 | |
| 2732 | out_fail: |
| 2733 | tconInfoFree(tcon); |
| 2734 | return ERR_PTR(rc); |
| 2735 | } |
| 2736 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 2737 | void |
| 2738 | cifs_put_tlink(struct tcon_link *tlink) |
| 2739 | { |
| 2740 | if (!tlink || IS_ERR(tlink)) |
| 2741 | return; |
| 2742 | |
| 2743 | if (!atomic_dec_and_test(&tlink->tl_count) || |
| 2744 | test_bit(TCON_LINK_IN_TREE, &tlink->tl_flags)) { |
| 2745 | tlink->tl_time = jiffies; |
| 2746 | return; |
| 2747 | } |
| 2748 | |
| 2749 | if (!IS_ERR(tlink_tcon(tlink))) |
| 2750 | cifs_put_tcon(tlink_tcon(tlink)); |
| 2751 | kfree(tlink); |
| 2752 | return; |
| 2753 | } |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 2754 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2755 | static inline struct tcon_link * |
Pavel Shilovsky | cd51875 | 2011-06-09 12:58:53 +0400 | [diff] [blame] | 2756 | cifs_sb_master_tlink(struct cifs_sb_info *cifs_sb) |
| 2757 | { |
| 2758 | return cifs_sb->master_tlink; |
| 2759 | } |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2760 | |
| 2761 | static int |
| 2762 | compare_mount_options(struct super_block *sb, struct cifs_mnt_data *mnt_data) |
| 2763 | { |
| 2764 | struct cifs_sb_info *old = CIFS_SB(sb); |
| 2765 | struct cifs_sb_info *new = mnt_data->cifs_sb; |
| 2766 | |
| 2767 | if ((sb->s_flags & CIFS_MS_MASK) != (mnt_data->flags & CIFS_MS_MASK)) |
| 2768 | return 0; |
| 2769 | |
| 2770 | if ((old->mnt_cifs_flags & CIFS_MOUNT_MASK) != |
| 2771 | (new->mnt_cifs_flags & CIFS_MOUNT_MASK)) |
| 2772 | return 0; |
| 2773 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2774 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 2775 | * We want to share sb only if we don't specify an r/wsize or |
| 2776 | * specified r/wsize is greater than or equal to existing one. |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2777 | */ |
| 2778 | if (new->wsize && new->wsize < old->wsize) |
| 2779 | return 0; |
| 2780 | |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 2781 | if (new->rsize && new->rsize < old->rsize) |
| 2782 | return 0; |
| 2783 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2784 | if (old->mnt_uid != new->mnt_uid || old->mnt_gid != new->mnt_gid) |
| 2785 | return 0; |
| 2786 | |
| 2787 | if (old->mnt_file_mode != new->mnt_file_mode || |
| 2788 | old->mnt_dir_mode != new->mnt_dir_mode) |
| 2789 | return 0; |
| 2790 | |
| 2791 | if (strcmp(old->local_nls->charset, new->local_nls->charset)) |
| 2792 | return 0; |
| 2793 | |
| 2794 | if (old->actimeo != new->actimeo) |
| 2795 | return 0; |
| 2796 | |
| 2797 | return 1; |
| 2798 | } |
| 2799 | |
| 2800 | int |
| 2801 | cifs_match_super(struct super_block *sb, void *data) |
| 2802 | { |
| 2803 | struct cifs_mnt_data *mnt_data = (struct cifs_mnt_data *)data; |
| 2804 | struct smb_vol *volume_info; |
| 2805 | struct cifs_sb_info *cifs_sb; |
| 2806 | struct TCP_Server_Info *tcp_srv; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2807 | struct cifs_ses *ses; |
| 2808 | struct cifs_tcon *tcon; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2809 | struct tcon_link *tlink; |
| 2810 | struct sockaddr_storage addr; |
| 2811 | int rc = 0; |
| 2812 | |
| 2813 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
| 2814 | |
| 2815 | spin_lock(&cifs_tcp_ses_lock); |
| 2816 | cifs_sb = CIFS_SB(sb); |
| 2817 | tlink = cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); |
| 2818 | if (IS_ERR(tlink)) { |
| 2819 | spin_unlock(&cifs_tcp_ses_lock); |
| 2820 | return rc; |
| 2821 | } |
| 2822 | tcon = tlink_tcon(tlink); |
| 2823 | ses = tcon->ses; |
| 2824 | tcp_srv = ses->server; |
| 2825 | |
| 2826 | volume_info = mnt_data->vol; |
| 2827 | |
| 2828 | if (!volume_info->UNCip || !volume_info->UNC) |
| 2829 | goto out; |
| 2830 | |
| 2831 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
| 2832 | volume_info->UNCip, |
| 2833 | strlen(volume_info->UNCip), |
| 2834 | volume_info->port); |
| 2835 | if (!rc) |
| 2836 | goto out; |
| 2837 | |
| 2838 | if (!match_server(tcp_srv, (struct sockaddr *)&addr, volume_info) || |
| 2839 | !match_session(ses, volume_info) || |
| 2840 | !match_tcon(tcon, volume_info->UNC)) { |
| 2841 | rc = 0; |
| 2842 | goto out; |
| 2843 | } |
| 2844 | |
| 2845 | rc = compare_mount_options(sb, mnt_data); |
| 2846 | out: |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2847 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | f484b5d0 | 2011-07-11 10:16:34 -0400 | [diff] [blame] | 2848 | cifs_put_tlink(tlink); |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 2849 | return rc; |
| 2850 | } |
| 2851 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2852 | int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 2853 | get_dfs_path(int xid, struct cifs_ses *pSesInfo, const char *old_path, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2854 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, |
Steve French | 366781c | 2008-01-25 10:12:41 +0000 | [diff] [blame] | 2855 | struct dfs_info3_param **preferrals, int remap) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2856 | { |
| 2857 | char *temp_unc; |
| 2858 | int rc = 0; |
| 2859 | |
| 2860 | *pnum_referrals = 0; |
Steve French | 366781c | 2008-01-25 10:12:41 +0000 | [diff] [blame] | 2861 | *preferrals = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2862 | |
| 2863 | if (pSesInfo->ipc_tid == 0) { |
| 2864 | temp_unc = kmalloc(2 /* for slashes */ + |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2865 | strnlen(pSesInfo->serverName, |
| 2866 | SERVER_NAME_LEN_WITH_NULL * 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2867 | + 1 + 4 /* slash IPC$ */ + 2, |
| 2868 | GFP_KERNEL); |
| 2869 | if (temp_unc == NULL) |
| 2870 | return -ENOMEM; |
| 2871 | temp_unc[0] = '\\'; |
| 2872 | temp_unc[1] = '\\'; |
| 2873 | strcpy(temp_unc + 2, pSesInfo->serverName); |
| 2874 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); |
| 2875 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 2876 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2877 | kfree(temp_unc); |
| 2878 | } |
| 2879 | if (rc == 0) |
Steve French | c2cf07d | 2008-05-15 06:20:02 +0000 | [diff] [blame] | 2880 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 2881 | pnum_referrals, nls_codepage, remap); |
Steve French | 366781c | 2008-01-25 10:12:41 +0000 | [diff] [blame] | 2882 | /* BB map targetUNCs to dfs_info3 structures, here or |
| 2883 | in CIFSGetDFSRefer BB */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2884 | |
| 2885 | return rc; |
| 2886 | } |
| 2887 | |
Jeff Layton | 09e50d5 | 2008-07-23 10:11:19 -0400 | [diff] [blame] | 2888 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
| 2889 | static struct lock_class_key cifs_key[2]; |
| 2890 | static struct lock_class_key cifs_slock_key[2]; |
| 2891 | |
| 2892 | static inline void |
| 2893 | cifs_reclassify_socket4(struct socket *sock) |
| 2894 | { |
| 2895 | struct sock *sk = sock->sk; |
| 2896 | BUG_ON(sock_owned_by_user(sk)); |
| 2897 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", |
| 2898 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); |
| 2899 | } |
| 2900 | |
| 2901 | static inline void |
| 2902 | cifs_reclassify_socket6(struct socket *sock) |
| 2903 | { |
| 2904 | struct sock *sk = sock->sk; |
| 2905 | BUG_ON(sock_owned_by_user(sk)); |
| 2906 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", |
| 2907 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); |
| 2908 | } |
| 2909 | #else |
| 2910 | static inline void |
| 2911 | cifs_reclassify_socket4(struct socket *sock) |
| 2912 | { |
| 2913 | } |
| 2914 | |
| 2915 | static inline void |
| 2916 | cifs_reclassify_socket6(struct socket *sock) |
| 2917 | { |
| 2918 | } |
| 2919 | #endif |
| 2920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2921 | /* See RFC1001 section 14 on representation of Netbios names */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2922 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2923 | { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2924 | unsigned int i, j; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2925 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2926 | for (i = 0, j = 0; i < (length); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | /* mask a nibble at a time and encode */ |
| 2928 | target[j] = 'A' + (0x0F & (source[i] >> 4)); |
| 2929 | target[j+1] = 'A' + (0x0F & source[i]); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 2930 | j += 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2931 | } |
| 2932 | |
| 2933 | } |
| 2934 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 2935 | static int |
| 2936 | bind_socket(struct TCP_Server_Info *server) |
| 2937 | { |
| 2938 | int rc = 0; |
| 2939 | if (server->srcaddr.ss_family != AF_UNSPEC) { |
| 2940 | /* Bind to the specified local IP address */ |
| 2941 | struct socket *socket = server->ssocket; |
| 2942 | rc = socket->ops->bind(socket, |
| 2943 | (struct sockaddr *) &server->srcaddr, |
| 2944 | sizeof(server->srcaddr)); |
| 2945 | if (rc < 0) { |
| 2946 | struct sockaddr_in *saddr4; |
| 2947 | struct sockaddr_in6 *saddr6; |
| 2948 | saddr4 = (struct sockaddr_in *)&server->srcaddr; |
| 2949 | saddr6 = (struct sockaddr_in6 *)&server->srcaddr; |
| 2950 | if (saddr6->sin6_family == AF_INET6) |
| 2951 | cERROR(1, "cifs: " |
| 2952 | "Failed to bind to: %pI6c, error: %d\n", |
| 2953 | &saddr6->sin6_addr, rc); |
| 2954 | else |
| 2955 | cERROR(1, "cifs: " |
| 2956 | "Failed to bind to: %pI4, error: %d\n", |
| 2957 | &saddr4->sin_addr.s_addr, rc); |
| 2958 | } |
| 2959 | } |
| 2960 | return rc; |
| 2961 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | |
| 2963 | static int |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2964 | ip_rfc1001_connect(struct TCP_Server_Info *server) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2965 | { |
| 2966 | int rc = 0; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 2967 | /* |
| 2968 | * some servers require RFC1001 sessinit before sending |
| 2969 | * negprot - BB check reconnection in case where second |
| 2970 | * sessinit is sent but no second negprot |
| 2971 | */ |
| 2972 | struct rfc1002_session_packet *ses_init_buf; |
| 2973 | struct smb_hdr *smb_buf; |
| 2974 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), |
| 2975 | GFP_KERNEL); |
| 2976 | if (ses_init_buf) { |
| 2977 | ses_init_buf->trailer.session_req.called_len = 32; |
| 2978 | |
| 2979 | if (server->server_RFC1001_name && |
| 2980 | server->server_RFC1001_name[0] != 0) |
| 2981 | rfc1002mangle(ses_init_buf->trailer. |
| 2982 | session_req.called_name, |
| 2983 | server->server_RFC1001_name, |
| 2984 | RFC1001_NAME_LEN_WITH_NULL); |
| 2985 | else |
| 2986 | rfc1002mangle(ses_init_buf->trailer. |
| 2987 | session_req.called_name, |
| 2988 | DEFAULT_CIFS_CALLED_NAME, |
| 2989 | RFC1001_NAME_LEN_WITH_NULL); |
| 2990 | |
| 2991 | ses_init_buf->trailer.session_req.calling_len = 32; |
| 2992 | |
| 2993 | /* |
| 2994 | * calling name ends in null (byte 16) from old smb |
| 2995 | * convention. |
| 2996 | */ |
| 2997 | if (server->workstation_RFC1001_name && |
| 2998 | server->workstation_RFC1001_name[0] != 0) |
| 2999 | rfc1002mangle(ses_init_buf->trailer. |
| 3000 | session_req.calling_name, |
| 3001 | server->workstation_RFC1001_name, |
| 3002 | RFC1001_NAME_LEN_WITH_NULL); |
| 3003 | else |
| 3004 | rfc1002mangle(ses_init_buf->trailer. |
| 3005 | session_req.calling_name, |
| 3006 | "LINUX_CIFS_CLNT", |
| 3007 | RFC1001_NAME_LEN_WITH_NULL); |
| 3008 | |
| 3009 | ses_init_buf->trailer.session_req.scope1 = 0; |
| 3010 | ses_init_buf->trailer.session_req.scope2 = 0; |
| 3011 | smb_buf = (struct smb_hdr *)ses_init_buf; |
| 3012 | |
| 3013 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ |
Steve French | be8e3b0 | 2011-04-29 05:40:20 +0000 | [diff] [blame] | 3014 | smb_buf->smb_buf_length = cpu_to_be32(0x81000044); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3015 | rc = smb_send(server, smb_buf, 0x44); |
| 3016 | kfree(ses_init_buf); |
| 3017 | /* |
| 3018 | * RFC1001 layer in at least one server |
| 3019 | * requires very short break before negprot |
| 3020 | * presumably because not expecting negprot |
| 3021 | * to follow so fast. This is a simple |
| 3022 | * solution that works without |
| 3023 | * complicating the code and causes no |
| 3024 | * significant slowing down on mount |
| 3025 | * for everyone else |
| 3026 | */ |
| 3027 | usleep_range(1000, 2000); |
| 3028 | } |
| 3029 | /* |
| 3030 | * else the negprot may still work without this |
| 3031 | * even though malloc failed |
| 3032 | */ |
| 3033 | |
| 3034 | return rc; |
| 3035 | } |
| 3036 | |
| 3037 | static int |
| 3038 | generic_ip_connect(struct TCP_Server_Info *server) |
| 3039 | { |
| 3040 | int rc = 0; |
Steve French | 6da9791 | 2011-03-13 18:55:55 +0000 | [diff] [blame] | 3041 | __be16 sport; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3042 | int slen, sfamily; |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 3043 | struct socket *socket = server->ssocket; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3044 | struct sockaddr *saddr; |
| 3045 | |
| 3046 | saddr = (struct sockaddr *) &server->dstaddr; |
| 3047 | |
| 3048 | if (server->dstaddr.ss_family == AF_INET6) { |
| 3049 | sport = ((struct sockaddr_in6 *) saddr)->sin6_port; |
| 3050 | slen = sizeof(struct sockaddr_in6); |
| 3051 | sfamily = AF_INET6; |
| 3052 | } else { |
| 3053 | sport = ((struct sockaddr_in *) saddr)->sin_port; |
| 3054 | slen = sizeof(struct sockaddr_in); |
| 3055 | sfamily = AF_INET; |
| 3056 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3057 | |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 3058 | if (socket == NULL) { |
Rob Landley | f1d0c99 | 2011-01-22 15:44:05 -0600 | [diff] [blame] | 3059 | rc = __sock_create(cifs_net_ns(server), sfamily, SOCK_STREAM, |
| 3060 | IPPROTO_TCP, &socket, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | if (rc < 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3062 | cERROR(1, "Error %d creating socket", rc); |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3063 | server->ssocket = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3064 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3065 | } |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 3066 | |
| 3067 | /* BB other socket options to set KEEPALIVE, NODELAY? */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3068 | cFYI(1, "Socket created"); |
Jeff Layton | bcf4b10 | 2008-12-01 18:42:15 -0500 | [diff] [blame] | 3069 | server->ssocket = socket; |
| 3070 | socket->sk->sk_allocation = GFP_NOFS; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3071 | if (sfamily == AF_INET6) |
| 3072 | cifs_reclassify_socket6(socket); |
| 3073 | else |
| 3074 | cifs_reclassify_socket4(socket); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3075 | } |
| 3076 | |
Ben Greear | 3eb9a88 | 2010-09-01 17:06:02 -0700 | [diff] [blame] | 3077 | rc = bind_socket(server); |
| 3078 | if (rc < 0) |
| 3079 | return rc; |
| 3080 | |
Jeff Layton | d5c5605 | 2008-12-01 18:42:33 -0500 | [diff] [blame] | 3081 | /* |
| 3082 | * Eventually check for other socket options to change from |
| 3083 | * the default. sock_setsockopt not used because it expects |
| 3084 | * user space buffer |
| 3085 | */ |
| 3086 | socket->sk->sk_rcvtimeo = 7 * HZ; |
Steve French | da505c3 | 2009-01-19 03:49:35 +0000 | [diff] [blame] | 3087 | socket->sk->sk_sndtimeo = 5 * HZ; |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 3088 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3089 | /* make the bufsizes depend on wsize/rsize and max requests */ |
| 3090 | if (server->noautotune) { |
| 3091 | if (socket->sk->sk_sndbuf < (200 * 1024)) |
| 3092 | socket->sk->sk_sndbuf = 200 * 1024; |
| 3093 | if (socket->sk->sk_rcvbuf < (140 * 1024)) |
| 3094 | socket->sk->sk_rcvbuf = 140 * 1024; |
| 3095 | } |
| 3096 | |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 3097 | if (server->tcp_nodelay) { |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3098 | int val = 1; |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 3099 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, |
| 3100 | (char *)&val, sizeof(val)); |
| 3101 | if (rc) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3102 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
Steve French | 6a5fa236 | 2010-01-01 01:28:43 +0000 | [diff] [blame] | 3103 | } |
| 3104 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3105 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
| 3106 | socket->sk->sk_sndbuf, |
| 3107 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
| 3108 | |
Jeff Layton | ee1b3ea | 2011-06-21 07:18:26 -0400 | [diff] [blame] | 3109 | rc = socket->ops->connect(socket, saddr, slen, 0); |
| 3110 | if (rc < 0) { |
| 3111 | cFYI(1, "Error %d connecting to server", rc); |
| 3112 | sock_release(socket); |
| 3113 | server->ssocket = NULL; |
| 3114 | return rc; |
| 3115 | } |
| 3116 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3117 | if (sport == htons(RFC1001_PORT)) |
| 3118 | rc = ip_rfc1001_connect(server); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3120 | return rc; |
| 3121 | } |
| 3122 | |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3123 | static int |
| 3124 | ip_connect(struct TCP_Server_Info *server) |
| 3125 | { |
Steve French | 6da9791 | 2011-03-13 18:55:55 +0000 | [diff] [blame] | 3126 | __be16 *sport; |
Pavel Shilovsky | a9f1b85 | 2010-12-13 19:08:35 +0300 | [diff] [blame] | 3127 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&server->dstaddr; |
| 3128 | struct sockaddr_in *addr = (struct sockaddr_in *)&server->dstaddr; |
| 3129 | |
| 3130 | if (server->dstaddr.ss_family == AF_INET6) |
| 3131 | sport = &addr6->sin6_port; |
| 3132 | else |
| 3133 | sport = &addr->sin_port; |
| 3134 | |
| 3135 | if (*sport == 0) { |
| 3136 | int rc; |
| 3137 | |
| 3138 | /* try with 445 port at first */ |
| 3139 | *sport = htons(CIFS_PORT); |
| 3140 | |
| 3141 | rc = generic_ip_connect(server); |
| 3142 | if (rc >= 0) |
| 3143 | return rc; |
| 3144 | |
| 3145 | /* if it failed, try with 139 port */ |
| 3146 | *sport = htons(RFC1001_PORT); |
| 3147 | } |
| 3148 | |
| 3149 | return generic_ip_connect(server); |
| 3150 | } |
| 3151 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3152 | void reset_cifs_unix_caps(int xid, struct cifs_tcon *tcon, |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3153 | struct cifs_sb_info *cifs_sb, struct smb_vol *vol_info) |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3154 | { |
| 3155 | /* if we are reconnecting then should we check to see if |
| 3156 | * any requested capabilities changed locally e.g. via |
| 3157 | * remount but we can not do much about it here |
| 3158 | * if they have (even if we could detect it by the following) |
| 3159 | * Perhaps we could add a backpointer to array of sb from tcon |
| 3160 | * or if we change to make all sb to same share the same |
| 3161 | * sb as NFS - then we only have one backpointer to sb. |
| 3162 | * What if we wanted to mount the server share twice once with |
| 3163 | * and once without posixacls or posix paths? */ |
| 3164 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3165 | |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 3166 | if (vol_info && vol_info->no_linux_ext) { |
| 3167 | tcon->fsUnixInfo.Capability = 0; |
| 3168 | tcon->unix_ext = 0; /* Unix Extensions disabled */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3169 | cFYI(1, "Linux protocol extensions disabled"); |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 3170 | return; |
| 3171 | } else if (vol_info) |
| 3172 | tcon->unix_ext = 1; /* Unix Extensions supported */ |
| 3173 | |
| 3174 | if (tcon->unix_ext == 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3175 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
Steve French | c18c842 | 2007-07-18 23:21:09 +0000 | [diff] [blame] | 3176 | return; |
| 3177 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3178 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 3179 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3180 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3181 | cFYI(1, "unix caps which server supports %lld", cap); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3182 | /* check for reconnect case in which we do not |
| 3183 | want to change the mount behavior if we can avoid it */ |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 3184 | if (vol_info == NULL) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3185 | /* turn off POSIX ACL and PATHNAMES if not set |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3186 | originally at mount time */ |
| 3187 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) |
| 3188 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
Igor Mammedov | 11b6d64 | 2008-02-15 19:06:04 +0000 | [diff] [blame] | 3189 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
| 3190 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3191 | cERROR(1, "POSIXPATH support change"); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3192 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
Igor Mammedov | 11b6d64 | 2008-02-15 19:06:04 +0000 | [diff] [blame] | 3193 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3194 | cERROR(1, "possible reconnect error"); |
| 3195 | cERROR(1, "server disabled POSIX path support"); |
Igor Mammedov | 11b6d64 | 2008-02-15 19:06:04 +0000 | [diff] [blame] | 3196 | } |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3197 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3198 | |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3199 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
| 3200 | cERROR(1, "per-share encryption not supported yet"); |
| 3201 | |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3202 | cap &= CIFS_UNIX_CAP_MASK; |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3203 | if (vol_info && vol_info->no_psx_acl) |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3204 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3205 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3206 | cFYI(1, "negotiated posix acl support"); |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3207 | if (cifs_sb) |
| 3208 | cifs_sb->mnt_cifs_flags |= |
| 3209 | CIFS_MOUNT_POSIXACL; |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3210 | } |
| 3211 | |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3212 | if (vol_info && vol_info->posix_paths == 0) |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3213 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3214 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3215 | cFYI(1, "negotiate posix pathnames"); |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3216 | if (cifs_sb) |
| 3217 | cifs_sb->mnt_cifs_flags |= |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3218 | CIFS_MOUNT_POSIX_PATHS; |
| 3219 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3220 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3221 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3222 | #ifdef CONFIG_CIFS_DEBUG2 |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3223 | if (cap & CIFS_UNIX_FCNTL_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3224 | cFYI(1, "FCNTL cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3225 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3226 | cFYI(1, "EXTATTR cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3227 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3228 | cFYI(1, "POSIX path cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3229 | if (cap & CIFS_UNIX_XATTR_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3230 | cFYI(1, "XATTR cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3231 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3232 | cFYI(1, "POSIX ACL cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3233 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3234 | cFYI(1, "very large read cap"); |
Steve French | 75865f8c | 2007-06-24 18:30:48 +0000 | [diff] [blame] | 3235 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3236 | cFYI(1, "very large write cap"); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3237 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) |
| 3238 | cFYI(1, "transport encryption cap"); |
| 3239 | if (cap & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) |
| 3240 | cFYI(1, "mandatory transport encryption cap"); |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3241 | #endif /* CIFS_DEBUG2 */ |
| 3242 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { |
Steve French | 442aa31 | 2007-09-24 20:25:46 +0000 | [diff] [blame] | 3243 | if (vol_info == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3244 | cFYI(1, "resetting capabilities failed"); |
Steve French | 442aa31 | 2007-09-24 20:25:46 +0000 | [diff] [blame] | 3245 | } else |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3246 | cERROR(1, "Negotiating Unix capabilities " |
Steve French | 5a44b31 | 2007-09-20 15:16:24 +0000 | [diff] [blame] | 3247 | "with the server failed. Consider " |
| 3248 | "mounting with the Unix Extensions\n" |
| 3249 | "disabled, if problems are found, " |
| 3250 | "by specifying the nounix mount " |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3251 | "option."); |
Steve French | 5a44b31 | 2007-09-20 15:16:24 +0000 | [diff] [blame] | 3252 | |
Steve French | 8af1897 | 2007-02-14 04:42:51 +0000 | [diff] [blame] | 3253 | } |
| 3254 | } |
| 3255 | } |
| 3256 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3257 | void cifs_setup_cifs_sb(struct smb_vol *pvolume_info, |
| 3258 | struct cifs_sb_info *cifs_sb) |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 3259 | { |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3260 | INIT_DELAYED_WORK(&cifs_sb->prune_tlinks, cifs_prune_tlinks); |
| 3261 | |
Al Viro | 2ced6f6 | 2011-06-17 09:20:04 -0400 | [diff] [blame] | 3262 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
| 3263 | cifs_sb->tlink_tree = RB_ROOT; |
| 3264 | |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 3265 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3266 | * Temporarily set r/wsize for matching superblock. If we end up using |
| 3267 | * new sb then client will later negotiate it downward if needed. |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 3268 | */ |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3269 | cifs_sb->rsize = pvolume_info->rsize; |
Pavel Shilovsky | 25c7f41 | 2011-05-26 23:35:47 +0400 | [diff] [blame] | 3270 | cifs_sb->wsize = pvolume_info->wsize; |
| 3271 | |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3272 | cifs_sb->mnt_uid = pvolume_info->linux_uid; |
| 3273 | cifs_sb->mnt_gid = pvolume_info->linux_gid; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 3274 | if (pvolume_info->backupuid_specified) |
| 3275 | cifs_sb->mnt_backupuid = pvolume_info->backupuid; |
| 3276 | if (pvolume_info->backupgid_specified) |
| 3277 | cifs_sb->mnt_backupgid = pvolume_info->backupgid; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3278 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; |
| 3279 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; |
Al Viro | 5206efd | 2011-07-26 03:22:14 -0400 | [diff] [blame] | 3280 | cFYI(1, "file mode: 0x%hx dir mode: 0x%hx", |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3281 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3282 | |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 3283 | cifs_sb->actimeo = pvolume_info->actimeo; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3284 | cifs_sb->local_nls = pvolume_info->local_nls; |
Suresh Jayaraman | 6d20e84 | 2010-12-01 14:42:28 +0530 | [diff] [blame] | 3285 | |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3286 | if (pvolume_info->noperm) |
| 3287 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; |
| 3288 | if (pvolume_info->setuids) |
| 3289 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; |
| 3290 | if (pvolume_info->server_ino) |
| 3291 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; |
| 3292 | if (pvolume_info->remap) |
| 3293 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; |
| 3294 | if (pvolume_info->no_xattr) |
| 3295 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; |
| 3296 | if (pvolume_info->sfu_emul) |
| 3297 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; |
| 3298 | if (pvolume_info->nobrl) |
| 3299 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; |
Steve French | be65244 | 2009-02-23 15:21:59 +0000 | [diff] [blame] | 3300 | if (pvolume_info->nostrictsync) |
Steve French | 4717bed | 2009-02-24 14:44:19 +0000 | [diff] [blame] | 3301 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
Steve French | 13a6e42 | 2008-12-02 17:24:33 +0000 | [diff] [blame] | 3302 | if (pvolume_info->mand_lock) |
| 3303 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; |
Pavel Shilovsky | d4ffff1 | 2011-05-26 06:02:00 +0000 | [diff] [blame] | 3304 | if (pvolume_info->rwpidforward) |
| 3305 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_RWPIDFORWARD; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3306 | if (pvolume_info->cifs_acl) |
| 3307 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; |
Shirish Pargaonkar | 3d3ea8e | 2011-09-26 09:56:44 -0500 | [diff] [blame] | 3308 | if (pvolume_info->backupuid_specified) |
| 3309 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPUID; |
| 3310 | if (pvolume_info->backupgid_specified) |
| 3311 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_BACKUPGID; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3312 | if (pvolume_info->override_uid) |
| 3313 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; |
| 3314 | if (pvolume_info->override_gid) |
| 3315 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; |
| 3316 | if (pvolume_info->dynperm) |
| 3317 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; |
Suresh Jayaraman | fa1df75 | 2010-07-05 18:13:36 +0530 | [diff] [blame] | 3318 | if (pvolume_info->fsc) |
| 3319 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; |
Jeff Layton | 0eb8a13 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3320 | if (pvolume_info->multiuser) |
| 3321 | cifs_sb->mnt_cifs_flags |= (CIFS_MOUNT_MULTIUSER | |
| 3322 | CIFS_MOUNT_NO_PERM); |
Pavel Shilovsky | d39454f | 2011-01-24 14:16:35 -0500 | [diff] [blame] | 3323 | if (pvolume_info->strict_io) |
| 3324 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_STRICT_IO; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3325 | if (pvolume_info->direct_io) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3326 | cFYI(1, "mounting share using direct i/o"); |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3327 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
| 3328 | } |
Stefan Metzmacher | 736a332 | 2010-07-30 14:56:00 +0200 | [diff] [blame] | 3329 | if (pvolume_info->mfsymlinks) { |
| 3330 | if (pvolume_info->sfu_emul) { |
| 3331 | cERROR(1, "mount option mfsymlinks ignored if sfu " |
| 3332 | "mount option is used"); |
| 3333 | } else { |
| 3334 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MF_SYMLINKS; |
| 3335 | } |
| 3336 | } |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3337 | |
| 3338 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3339 | cERROR(1, "mount option dynperm ignored if cifsacl " |
| 3340 | "mount option supported"); |
Jeff Layton | b1c8d2b | 2008-10-22 13:57:07 -0400 | [diff] [blame] | 3341 | } |
| 3342 | |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3343 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3344 | * When the server supports very large reads and writes via POSIX extensions, |
| 3345 | * we can allow up to 2^24-1, minus the size of a READ/WRITE_AND_X header, not |
| 3346 | * including the RFC1001 length. |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3347 | * |
| 3348 | * Note that this might make for "interesting" allocation problems during |
Jeff Layton | 1190f6a | 2011-06-22 17:33:57 -0400 | [diff] [blame] | 3349 | * writeback however as we have to allocate an array of pointers for the |
| 3350 | * pages. A 16M write means ~32kb page array with PAGE_CACHE_SIZE == 4096. |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3351 | * |
| 3352 | * For reads, there is a similar problem as we need to allocate an array |
| 3353 | * of kvecs to handle the receive, though that should only need to be done |
| 3354 | * once. |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3355 | */ |
Jeff Layton | 1190f6a | 2011-06-22 17:33:57 -0400 | [diff] [blame] | 3356 | #define CIFS_MAX_WSIZE ((1<<24) - 1 - sizeof(WRITE_REQ) + 4) |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3357 | #define CIFS_MAX_RSIZE ((1<<24) - sizeof(READ_RSP) + 4) |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3358 | |
| 3359 | /* |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3360 | * When the server doesn't allow large posix writes, only allow a rsize/wsize |
| 3361 | * of 2^17-1 minus the size of the call header. That allows for a read or |
| 3362 | * write up to the maximum size described by RFC1002. |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3363 | */ |
Pavel Shilovsky | 94443f4 | 2011-10-07 18:57:45 +0400 | [diff] [blame] | 3364 | #define CIFS_MAX_RFC1002_WSIZE ((1<<17) - 1 - sizeof(WRITE_REQ) + 4) |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3365 | #define CIFS_MAX_RFC1002_RSIZE ((1<<17) - 1 - sizeof(READ_RSP) + 4) |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3366 | |
| 3367 | /* |
| 3368 | * The default wsize is 1M. find_get_pages seems to return a maximum of 256 |
| 3369 | * pages in a single call. With PAGE_CACHE_SIZE == 4k, this means we can fill |
| 3370 | * a single wsize request with a single call. |
| 3371 | */ |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3372 | #define CIFS_DEFAULT_IOSIZE (1024 * 1024) |
| 3373 | |
| 3374 | /* |
Jeff Layton | ce91acb | 2012-01-17 16:08:51 -0500 | [diff] [blame] | 3375 | * Windows only supports a max of 60kb reads and 65535 byte writes. Default to |
| 3376 | * those values when posix extensions aren't in force. In actuality here, we |
| 3377 | * use 65536 to allow for a write that is a multiple of 4k. Most servers seem |
| 3378 | * to be ok with the extra byte even though Windows doesn't send writes that |
| 3379 | * are that large. |
| 3380 | * |
| 3381 | * Citation: |
| 3382 | * |
| 3383 | * http://blogs.msdn.com/b/openspecification/archive/2009/04/10/smb-maximum-transmit-buffer-size-and-performance-tuning.aspx |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3384 | */ |
| 3385 | #define CIFS_DEFAULT_NON_POSIX_RSIZE (60 * 1024) |
Jeff Layton | ce91acb | 2012-01-17 16:08:51 -0500 | [diff] [blame] | 3386 | #define CIFS_DEFAULT_NON_POSIX_WSIZE (65536) |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3387 | |
| 3388 | static unsigned int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3389 | cifs_negotiate_wsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3390 | { |
| 3391 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
| 3392 | struct TCP_Server_Info *server = tcon->ses->server; |
Jeff Layton | ce91acb | 2012-01-17 16:08:51 -0500 | [diff] [blame] | 3393 | unsigned int wsize; |
| 3394 | |
| 3395 | /* start with specified wsize, or default */ |
| 3396 | if (pvolume_info->wsize) |
| 3397 | wsize = pvolume_info->wsize; |
| 3398 | else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) |
| 3399 | wsize = CIFS_DEFAULT_IOSIZE; |
| 3400 | else |
| 3401 | wsize = CIFS_DEFAULT_NON_POSIX_WSIZE; |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3402 | |
| 3403 | /* can server support 24-bit write sizes? (via UNIX extensions) */ |
| 3404 | if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP)) |
Jeff Layton | 1190f6a | 2011-06-22 17:33:57 -0400 | [diff] [blame] | 3405 | wsize = min_t(unsigned int, wsize, CIFS_MAX_RFC1002_WSIZE); |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3406 | |
Jeff Layton | 1190f6a | 2011-06-22 17:33:57 -0400 | [diff] [blame] | 3407 | /* |
| 3408 | * no CAP_LARGE_WRITE_X or is signing enabled without CAP_UNIX set? |
| 3409 | * Limit it to max buffer offered by the server, minus the size of the |
| 3410 | * WRITEX header, not including the 4 byte RFC1001 length. |
| 3411 | */ |
| 3412 | if (!(server->capabilities & CAP_LARGE_WRITE_X) || |
| 3413 | (!(server->capabilities & CAP_UNIX) && |
| 3414 | (server->sec_mode & (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)))) |
| 3415 | wsize = min_t(unsigned int, wsize, |
| 3416 | server->maxBuf - sizeof(WRITE_REQ) + 4); |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3417 | |
| 3418 | /* hard limit of CIFS_MAX_WSIZE */ |
| 3419 | wsize = min_t(unsigned int, wsize, CIFS_MAX_WSIZE); |
| 3420 | |
| 3421 | return wsize; |
| 3422 | } |
| 3423 | |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3424 | static unsigned int |
| 3425 | cifs_negotiate_rsize(struct cifs_tcon *tcon, struct smb_vol *pvolume_info) |
| 3426 | { |
| 3427 | __u64 unix_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
| 3428 | struct TCP_Server_Info *server = tcon->ses->server; |
| 3429 | unsigned int rsize, defsize; |
| 3430 | |
| 3431 | /* |
| 3432 | * Set default value... |
| 3433 | * |
| 3434 | * HACK alert! Ancient servers have very small buffers. Even though |
| 3435 | * MS-CIFS indicates that servers are only limited by the client's |
| 3436 | * bufsize for reads, testing against win98se shows that it throws |
| 3437 | * INVALID_PARAMETER errors if you try to request too large a read. |
| 3438 | * |
| 3439 | * If the server advertises a MaxBufferSize of less than one page, |
| 3440 | * assume that it also can't satisfy reads larger than that either. |
| 3441 | * |
| 3442 | * FIXME: Is there a better heuristic for this? |
| 3443 | */ |
| 3444 | if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_READ_CAP)) |
| 3445 | defsize = CIFS_DEFAULT_IOSIZE; |
| 3446 | else if (server->capabilities & CAP_LARGE_READ_X) |
| 3447 | defsize = CIFS_DEFAULT_NON_POSIX_RSIZE; |
| 3448 | else if (server->maxBuf >= PAGE_CACHE_SIZE) |
| 3449 | defsize = CIFSMaxBufSize; |
| 3450 | else |
| 3451 | defsize = server->maxBuf - sizeof(READ_RSP); |
| 3452 | |
| 3453 | rsize = pvolume_info->rsize ? pvolume_info->rsize : defsize; |
| 3454 | |
| 3455 | /* |
| 3456 | * no CAP_LARGE_READ_X? Then MS-CIFS states that we must limit this to |
| 3457 | * the client's MaxBufferSize. |
| 3458 | */ |
| 3459 | if (!(server->capabilities & CAP_LARGE_READ_X)) |
| 3460 | rsize = min_t(unsigned int, CIFSMaxBufSize, rsize); |
| 3461 | |
| 3462 | /* hard limit of CIFS_MAX_RSIZE */ |
| 3463 | rsize = min_t(unsigned int, rsize, CIFS_MAX_RSIZE); |
| 3464 | |
| 3465 | return rsize; |
| 3466 | } |
| 3467 | |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3468 | static int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3469 | is_path_accessible(int xid, struct cifs_tcon *tcon, |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3470 | struct cifs_sb_info *cifs_sb, const char *full_path) |
| 3471 | { |
| 3472 | int rc; |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3473 | FILE_ALL_INFO *pfile_info; |
| 3474 | |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3475 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
| 3476 | if (pfile_info == NULL) |
| 3477 | return -ENOMEM; |
| 3478 | |
| 3479 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, |
| 3480 | 0 /* not legacy */, cifs_sb->local_nls, |
| 3481 | cifs_sb->mnt_cifs_flags & |
| 3482 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Jeff Layton | 221d1d7 | 2011-05-17 06:40:30 -0400 | [diff] [blame] | 3483 | |
| 3484 | if (rc == -EOPNOTSUPP || rc == -EINVAL) |
| 3485 | rc = SMBQueryInformation(xid, tcon, full_path, pfile_info, |
| 3486 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| 3487 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3488 | kfree(pfile_info); |
| 3489 | return rc; |
| 3490 | } |
| 3491 | |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3492 | static void |
| 3493 | cleanup_volume_info_contents(struct smb_vol *volume_info) |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3494 | { |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 3495 | kfree(volume_info->username); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3496 | kzfree(volume_info->password); |
Steve French | 13589c4 | 2011-08-18 04:41:55 +0000 | [diff] [blame] | 3497 | if (volume_info->UNCip != volume_info->UNC + 2) |
| 3498 | kfree(volume_info->UNCip); |
Jesper Juhl | 95c7545 | 2011-08-27 18:58:34 +0200 | [diff] [blame] | 3499 | kfree(volume_info->UNC); |
Sean Finney | b946845 | 2011-04-11 13:19:32 +0000 | [diff] [blame] | 3500 | kfree(volume_info->domainname); |
| 3501 | kfree(volume_info->iocharset); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3502 | kfree(volume_info->prepath); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3503 | } |
| 3504 | |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3505 | void |
| 3506 | cifs_cleanup_volume_info(struct smb_vol *volume_info) |
| 3507 | { |
| 3508 | if (!volume_info) |
| 3509 | return; |
| 3510 | cleanup_volume_info_contents(volume_info); |
| 3511 | kfree(volume_info); |
| 3512 | } |
| 3513 | |
| 3514 | |
Steve French | 2d6d589 | 2009-04-09 00:36:44 +0000 | [diff] [blame] | 3515 | #ifdef CONFIG_CIFS_DFS_UPCALL |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3516 | /* build_path_to_root returns full path to root when |
| 3517 | * we do not have an exiting connection (tcon) */ |
| 3518 | static char * |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3519 | build_unc_path_to_root(const struct smb_vol *vol, |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3520 | const struct cifs_sb_info *cifs_sb) |
| 3521 | { |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3522 | char *full_path, *pos; |
| 3523 | unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0; |
| 3524 | unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3525 | |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3526 | full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3527 | if (full_path == NULL) |
| 3528 | return ERR_PTR(-ENOMEM); |
| 3529 | |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3530 | strncpy(full_path, vol->UNC, unc_len); |
| 3531 | pos = full_path + unc_len; |
| 3532 | |
| 3533 | if (pplen) { |
| 3534 | strncpy(pos, vol->prepath, pplen); |
| 3535 | pos += pplen; |
| 3536 | } |
| 3537 | |
| 3538 | *pos = '\0'; /* add trailing null */ |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 3539 | convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb)); |
Jeff Layton | b2a0fa1 | 2011-07-06 08:10:36 -0400 | [diff] [blame] | 3540 | cFYI(1, "%s: full_path=%s", __func__, full_path); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3541 | return full_path; |
| 3542 | } |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3543 | |
| 3544 | /* |
| 3545 | * Perform a dfs referral query for a share and (optionally) prefix |
| 3546 | * |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3547 | * If a referral is found, cifs_sb->mountdata will be (re-)allocated |
| 3548 | * to a string containing updated options for the submount. Otherwise it |
| 3549 | * will be left untouched. |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3550 | * |
| 3551 | * Returns the rc from get_dfs_path to the caller, which can be used to |
| 3552 | * determine whether there were referrals. |
| 3553 | */ |
| 3554 | static int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3555 | expand_dfs_referral(int xid, struct cifs_ses *pSesInfo, |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3556 | struct smb_vol *volume_info, struct cifs_sb_info *cifs_sb, |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3557 | int check_prefix) |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3558 | { |
| 3559 | int rc; |
| 3560 | unsigned int num_referrals = 0; |
| 3561 | struct dfs_info3_param *referrals = NULL; |
| 3562 | char *full_path = NULL, *ref_path = NULL, *mdata = NULL; |
| 3563 | |
| 3564 | full_path = build_unc_path_to_root(volume_info, cifs_sb); |
| 3565 | if (IS_ERR(full_path)) |
| 3566 | return PTR_ERR(full_path); |
| 3567 | |
| 3568 | /* For DFS paths, skip the first '\' of the UNC */ |
| 3569 | ref_path = check_prefix ? full_path + 1 : volume_info->UNC + 1; |
| 3570 | |
| 3571 | rc = get_dfs_path(xid, pSesInfo , ref_path, cifs_sb->local_nls, |
| 3572 | &num_referrals, &referrals, |
| 3573 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 3574 | |
| 3575 | if (!rc && num_referrals > 0) { |
| 3576 | char *fake_devname = NULL; |
| 3577 | |
| 3578 | mdata = cifs_compose_mount_options(cifs_sb->mountdata, |
| 3579 | full_path + 1, referrals, |
| 3580 | &fake_devname); |
| 3581 | |
| 3582 | free_dfs_info_array(referrals, num_referrals); |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3583 | |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3584 | if (IS_ERR(mdata)) { |
| 3585 | rc = PTR_ERR(mdata); |
| 3586 | mdata = NULL; |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3587 | } else { |
| 3588 | cleanup_volume_info_contents(volume_info); |
| 3589 | memset(volume_info, '\0', sizeof(*volume_info)); |
| 3590 | rc = cifs_setup_volume_info(volume_info, mdata, |
| 3591 | fake_devname); |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3592 | } |
Jeff Layton | b9bce2e | 2011-07-06 08:10:39 -0400 | [diff] [blame] | 3593 | kfree(fake_devname); |
| 3594 | kfree(cifs_sb->mountdata); |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3595 | cifs_sb->mountdata = mdata; |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3596 | } |
| 3597 | kfree(full_path); |
| 3598 | return rc; |
| 3599 | } |
Steve French | 2d6d589 | 2009-04-09 00:36:44 +0000 | [diff] [blame] | 3600 | #endif |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3601 | |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3602 | static int |
| 3603 | cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data, |
| 3604 | const char *devname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3605 | { |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3606 | int rc = 0; |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3607 | |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3608 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) |
| 3609 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3610 | |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3611 | if (volume_info->nullauth) { |
Jeff Layton | 04febab | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 3612 | cFYI(1, "Anonymous login"); |
| 3613 | kfree(volume_info->username); |
| 3614 | volume_info->username = NULL; |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3615 | } else if (volume_info->username) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3616 | /* BB fixme parse for domain name here */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3617 | cFYI(1, "Username: %s", volume_info->username); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3618 | } else { |
Steve French | bf82067 | 2005-12-01 22:32:42 -0800 | [diff] [blame] | 3619 | cifserror("No username specified"); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3620 | /* In userspace mount helper we can get user name from alternate |
| 3621 | locations such as env variables and files on disk */ |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3622 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3623 | } |
| 3624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3625 | /* this is needed for ASCII cp to Unicode converts */ |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3626 | if (volume_info->iocharset == NULL) { |
Jeff Layton | a5fc4ce | 2010-04-24 07:57:42 -0400 | [diff] [blame] | 3627 | /* load_nls_default cannot return null */ |
| 3628 | volume_info->local_nls = load_nls_default(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3629 | } else { |
Jeff Layton | a5fc4ce | 2010-04-24 07:57:42 -0400 | [diff] [blame] | 3630 | volume_info->local_nls = load_nls(volume_info->iocharset); |
| 3631 | if (volume_info->local_nls == NULL) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3632 | cERROR(1, "CIFS mount error: iocharset %s not found", |
| 3633 | volume_info->iocharset); |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3634 | return -ELIBACC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3635 | } |
| 3636 | } |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3637 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3638 | return rc; |
Jeff Layton | 04db79b | 2011-07-06 08:10:38 -0400 | [diff] [blame] | 3639 | } |
| 3640 | |
| 3641 | struct smb_vol * |
| 3642 | cifs_get_volume_info(char *mount_data, const char *devname) |
| 3643 | { |
| 3644 | int rc; |
| 3645 | struct smb_vol *volume_info; |
| 3646 | |
| 3647 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
| 3648 | if (!volume_info) |
| 3649 | return ERR_PTR(-ENOMEM); |
| 3650 | |
| 3651 | rc = cifs_setup_volume_info(volume_info, mount_data, devname); |
| 3652 | if (rc) { |
| 3653 | cifs_cleanup_volume_info(volume_info); |
| 3654 | volume_info = ERR_PTR(rc); |
| 3655 | } |
| 3656 | |
| 3657 | return volume_info; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3658 | } |
| 3659 | |
Jeff Layton | 66bfaad | 2011-10-19 15:30:35 -0400 | [diff] [blame] | 3660 | /* make sure ra_pages is a multiple of rsize */ |
| 3661 | static inline unsigned int |
| 3662 | cifs_ra_pages(struct cifs_sb_info *cifs_sb) |
| 3663 | { |
| 3664 | unsigned int reads; |
| 3665 | unsigned int rsize_pages = cifs_sb->rsize / PAGE_CACHE_SIZE; |
| 3666 | |
| 3667 | if (rsize_pages >= default_backing_dev_info.ra_pages) |
| 3668 | return default_backing_dev_info.ra_pages; |
| 3669 | else if (rsize_pages == 0) |
| 3670 | return rsize_pages; |
| 3671 | |
| 3672 | reads = default_backing_dev_info.ra_pages / rsize_pages; |
| 3673 | return reads * rsize_pages; |
| 3674 | } |
| 3675 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3676 | int |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3677 | 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] | 3678 | { |
Jeff Layton | 1daaae8 | 2012-03-21 06:30:40 -0400 | [diff] [blame] | 3679 | int rc; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3680 | int xid; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3681 | struct cifs_ses *pSesInfo; |
| 3682 | struct cifs_tcon *tcon; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3683 | struct TCP_Server_Info *srvTcp; |
| 3684 | char *full_path; |
| 3685 | struct tcon_link *tlink; |
| 3686 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 3687 | int referral_walks_count = 0; |
Jeff Layton | 2054749 | 2011-07-09 12:21:07 -0400 | [diff] [blame] | 3688 | #endif |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3689 | |
| 3690 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); |
| 3691 | if (rc) |
| 3692 | return rc; |
| 3693 | |
Jeff Layton | 2054749 | 2011-07-09 12:21:07 -0400 | [diff] [blame] | 3694 | #ifdef CONFIG_CIFS_DFS_UPCALL |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3695 | try_mount_again: |
| 3696 | /* cleanup activities if we're chasing a referral */ |
| 3697 | if (referral_walks_count) { |
| 3698 | if (tcon) |
| 3699 | cifs_put_tcon(tcon); |
| 3700 | else if (pSesInfo) |
| 3701 | cifs_put_smb_ses(pSesInfo); |
| 3702 | |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3703 | FreeXid(xid); |
| 3704 | } |
| 3705 | #endif |
Jeff Layton | 1daaae8 | 2012-03-21 06:30:40 -0400 | [diff] [blame] | 3706 | rc = 0; |
Pavel Shilovsky | 724d9f1 | 2011-05-05 09:55:12 +0000 | [diff] [blame] | 3707 | tcon = NULL; |
| 3708 | pSesInfo = NULL; |
| 3709 | srvTcp = NULL; |
| 3710 | full_path = NULL; |
| 3711 | tlink = NULL; |
| 3712 | |
| 3713 | xid = GetXid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3714 | |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 3715 | /* get a reference to a tcp session */ |
Jeff Layton | 7586b76 | 2008-12-01 18:41:49 -0500 | [diff] [blame] | 3716 | srvTcp = cifs_get_tcp_session(volume_info); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 3717 | if (IS_ERR(srvTcp)) { |
| 3718 | rc = PTR_ERR(srvTcp); |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3719 | bdi_destroy(&cifs_sb->bdi); |
Jeff Layton | 63c038c | 2008-12-01 18:41:46 -0500 | [diff] [blame] | 3720 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3721 | } |
| 3722 | |
Jeff Layton | 36988c7 | 2010-04-24 07:57:43 -0400 | [diff] [blame] | 3723 | /* get a reference to a SMB session */ |
| 3724 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); |
| 3725 | if (IS_ERR(pSesInfo)) { |
| 3726 | rc = PTR_ERR(pSesInfo); |
| 3727 | pSesInfo = NULL; |
| 3728 | goto mount_fail_check; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3729 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3730 | |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 3731 | /* search for existing tcon to this server share */ |
| 3732 | tcon = cifs_get_tcon(pSesInfo, volume_info); |
| 3733 | if (IS_ERR(tcon)) { |
| 3734 | rc = PTR_ERR(tcon); |
| 3735 | tcon = NULL; |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3736 | goto remote_path_check; |
Jeff Layton | d00c28d | 2010-04-24 07:57:44 -0400 | [diff] [blame] | 3737 | } |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3738 | |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3739 | /* tell server which Unix caps we support */ |
| 3740 | if (tcon->ses->capabilities & CAP_UNIX) { |
| 3741 | /* reset of caps checks mount to see if unix extensions |
| 3742 | disabled for just this mount */ |
Al Viro | 2c6292a | 2011-06-17 09:05:48 -0400 | [diff] [blame] | 3743 | reset_cifs_unix_caps(xid, tcon, cifs_sb, volume_info); |
Steve French | 6848b73 | 2011-05-26 18:38:54 +0000 | [diff] [blame] | 3744 | if ((tcon->ses->server->tcpStatus == CifsNeedReconnect) && |
| 3745 | (le64_to_cpu(tcon->fsUnixInfo.Capability) & |
| 3746 | CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP)) { |
| 3747 | rc = -EACCES; |
| 3748 | goto mount_fail_check; |
| 3749 | } |
| 3750 | } else |
| 3751 | tcon->unix_ext = 0; /* server does not support them */ |
| 3752 | |
Steve French | d82c2df | 2008-11-15 00:07:26 +0000 | [diff] [blame] | 3753 | /* do not care if following two calls succeed - informational */ |
| 3754 | if (!tcon->ipc) { |
| 3755 | CIFSSMBQFSDeviceInfo(xid, tcon); |
| 3756 | CIFSSMBQFSAttributeInfo(xid, tcon); |
| 3757 | } |
| 3758 | |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3759 | cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info); |
Jeff Layton | 5eba8ab | 2011-10-19 15:30:26 -0400 | [diff] [blame] | 3760 | cifs_sb->rsize = cifs_negotiate_rsize(tcon, volume_info); |
Jeff Layton | f7910cb | 2011-05-19 16:22:58 -0400 | [diff] [blame] | 3761 | |
Jeff Layton | 66bfaad | 2011-10-19 15:30:35 -0400 | [diff] [blame] | 3762 | /* tune readahead according to rsize */ |
| 3763 | cifs_sb->bdi.ra_pages = cifs_ra_pages(cifs_sb); |
Jeff Layton | 03ceace | 2010-12-06 21:07:33 -0500 | [diff] [blame] | 3764 | |
Igor Mammedov | e4cce94 | 2009-02-10 14:10:26 +0300 | [diff] [blame] | 3765 | remote_path_check: |
| 3766 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 3767 | /* |
| 3768 | * Perform an unconditional check for whether there are DFS |
| 3769 | * referrals for this path without prefix, to provide support |
| 3770 | * for DFS referrals from w2k8 servers which don't seem to respond |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3771 | * with PATH_NOT_COVERED to requests that include the prefix. |
| 3772 | * Chase the referral if found, otherwise continue normally. |
Steve French | d036f50 | 2009-04-03 03:12:08 +0000 | [diff] [blame] | 3773 | */ |
Igor Mammedov | 5c2503a | 2009-04-21 19:31:05 +0400 | [diff] [blame] | 3774 | if (referral_walks_count == 0) { |
| 3775 | int refrc = expand_dfs_referral(xid, pSesInfo, volume_info, |
| 3776 | cifs_sb, false); |
| 3777 | if (!refrc) { |
| 3778 | referral_walks_count++; |
| 3779 | goto try_mount_again; |
| 3780 | } |
| 3781 | } |
| 3782 | #endif |
| 3783 | |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 3784 | /* check if a whole path is not remote */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3785 | if (!rc && tcon) { |
| 3786 | /* build_path_to_root works only when we have a valid tcon */ |
Steve French | f87d39d | 2011-05-27 03:50:55 +0000 | [diff] [blame] | 3787 | full_path = cifs_build_path_to_root(volume_info, cifs_sb, tcon); |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3788 | if (full_path == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3789 | rc = -ENOMEM; |
| 3790 | goto mount_fail_check; |
| 3791 | } |
| 3792 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); |
| 3793 | if (rc != 0 && rc != -EREMOTE) { |
| 3794 | kfree(full_path); |
| 3795 | goto mount_fail_check; |
| 3796 | } |
| 3797 | kfree(full_path); |
| 3798 | } |
| 3799 | |
| 3800 | /* get referral if needed */ |
| 3801 | if (rc == -EREMOTE) { |
| 3802 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 3803 | if (referral_walks_count > MAX_NESTED_LINKS) { |
| 3804 | /* |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3805 | * BB: when we implement proper loop detection, |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 3806 | * we will remove this check. But now we need it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3807 | * to prevent an indefinite loop if 'DFS tree' is |
| 3808 | * misconfigured (i.e. has loops). |
| 3809 | */ |
| 3810 | rc = -ELOOP; |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3811 | goto mount_fail_check; |
| 3812 | } |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3813 | |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3814 | rc = expand_dfs_referral(xid, pSesInfo, volume_info, cifs_sb, |
Sean Finney | 046462a | 2011-04-11 13:19:33 +0000 | [diff] [blame] | 3815 | true); |
Jeff Layton | 7b91e26 | 2009-07-23 15:22:30 -0400 | [diff] [blame] | 3816 | |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3817 | if (!rc) { |
Igor Mammedov | 5c2503a | 2009-04-21 19:31:05 +0400 | [diff] [blame] | 3818 | referral_walks_count++; |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3819 | goto try_mount_again; |
| 3820 | } |
Sean Finney | dd61394 | 2011-04-11 13:19:30 +0000 | [diff] [blame] | 3821 | goto mount_fail_check; |
Steve French | d036f50 | 2009-04-03 03:12:08 +0000 | [diff] [blame] | 3822 | #else /* No DFS support, return error on mount */ |
| 3823 | rc = -EOPNOTSUPP; |
| 3824 | #endif |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3825 | } |
| 3826 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3827 | if (rc) |
| 3828 | goto mount_fail_check; |
| 3829 | |
| 3830 | /* now, hang the tcon off of the superblock */ |
| 3831 | tlink = kzalloc(sizeof *tlink, GFP_KERNEL); |
| 3832 | if (tlink == NULL) { |
| 3833 | rc = -ENOMEM; |
| 3834 | goto mount_fail_check; |
| 3835 | } |
| 3836 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3837 | tlink->tl_uid = pSesInfo->linux_uid; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 3838 | tlink->tl_tcon = tcon; |
| 3839 | tlink->tl_time = jiffies; |
| 3840 | set_bit(TCON_LINK_MASTER, &tlink->tl_flags); |
| 3841 | set_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); |
| 3842 | |
Jeff Layton | 413e661 | 2010-10-28 13:33:38 -0400 | [diff] [blame] | 3843 | cifs_sb->master_tlink = tlink; |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 3844 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 3845 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
| 3846 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 413e661 | 2010-10-28 13:33:38 -0400 | [diff] [blame] | 3847 | |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 3848 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 3849 | TLINK_IDLE_EXPIRE); |
| 3850 | |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3851 | mount_fail_check: |
| 3852 | /* on error free sesinfo and tcon struct if needed */ |
| 3853 | if (rc) { |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3854 | /* 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] | 3855 | /* up accidentally freeing someone elses tcon struct */ |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3856 | if (tcon) |
| 3857 | cifs_put_tcon(tcon); |
| 3858 | else if (pSesInfo) |
| 3859 | cifs_put_smb_ses(pSesInfo); |
| 3860 | else |
| 3861 | cifs_put_tcp_session(srvTcp); |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 3862 | bdi_destroy(&cifs_sb->bdi); |
Igor Mammedov | 1bfe73c | 2009-04-01 17:54:42 +0400 | [diff] [blame] | 3863 | } |
| 3864 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3865 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3866 | FreeXid(xid); |
| 3867 | return rc; |
| 3868 | } |
| 3869 | |
Jeff Layton | 8d1bca3 | 2011-06-11 21:17:10 -0400 | [diff] [blame] | 3870 | /* |
| 3871 | * Issue a TREE_CONNECT request. Note that for IPC$ shares, that the tcon |
| 3872 | * pointer may be NULL. |
| 3873 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3874 | int |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3875 | CIFSTCon(unsigned int xid, struct cifs_ses *ses, |
| 3876 | const char *tree, struct cifs_tcon *tcon, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3877 | const struct nls_table *nls_codepage) |
| 3878 | { |
| 3879 | struct smb_hdr *smb_buffer; |
| 3880 | struct smb_hdr *smb_buffer_response; |
| 3881 | TCONX_REQ *pSMB; |
| 3882 | TCONX_RSP *pSMBr; |
| 3883 | unsigned char *bcc_ptr; |
| 3884 | int rc = 0; |
Jeff Layton | 690c522 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 3885 | int length; |
| 3886 | __u16 bytes_left, count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3887 | |
| 3888 | if (ses == NULL) |
| 3889 | return -EIO; |
| 3890 | |
| 3891 | smb_buffer = cifs_buf_get(); |
Steve French | ca43e3b | 2009-09-01 17:20:50 +0000 | [diff] [blame] | 3892 | if (smb_buffer == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3893 | return -ENOMEM; |
Steve French | ca43e3b | 2009-09-01 17:20:50 +0000 | [diff] [blame] | 3894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3895 | smb_buffer_response = smb_buffer; |
| 3896 | |
| 3897 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, |
| 3898 | NULL /*no tid */ , 4 /*wct */ ); |
Steve French | 1982c34 | 2005-08-17 12:38:22 -0700 | [diff] [blame] | 3899 | |
| 3900 | smb_buffer->Mid = GetNextMid(ses->server); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3901 | smb_buffer->Uid = ses->Suid; |
| 3902 | pSMB = (TCONX_REQ *) smb_buffer; |
| 3903 | pSMBr = (TCONX_RSP *) smb_buffer_response; |
| 3904 | |
| 3905 | pSMB->AndXCommand = 0xFF; |
| 3906 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3907 | bcc_ptr = &pSMB->Password[0]; |
Jeff Layton | 8d1bca3 | 2011-06-11 21:17:10 -0400 | [diff] [blame] | 3908 | if (!tcon || (ses->server->sec_mode & SECMODE_USER)) { |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3909 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3910 | *bcc_ptr = 0; /* password is null byte */ |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3911 | bcc_ptr++; /* skip password */ |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3912 | /* already aligned so no need to do it below */ |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3913 | } else { |
Shirish Pargaonkar | 540b2e3 | 2011-01-18 22:33:54 -0600 | [diff] [blame] | 3914 | pSMB->PasswordLength = cpu_to_le16(CIFS_AUTH_RESP_SIZE); |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3915 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
| 3916 | specified as required (when that support is added to |
| 3917 | the vfs in the future) as only NTLM or the much |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3918 | weaker LANMAN (which we do not send by default) is accepted |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3919 | by Samba (not sure whether other servers allow |
| 3920 | NTLMv2 password here) */ |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3921 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
Jeff Layton | 04912d6 | 2010-04-24 07:57:45 -0400 | [diff] [blame] | 3922 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
Jeff Layton | 00e485b | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 3923 | (ses->server->secType == LANMAN)) |
Shirish Pargaonkar | d3ba50b | 2010-10-27 15:20:36 -0500 | [diff] [blame] | 3924 | calc_lanman_hash(tcon->password, ses->server->cryptkey, |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3925 | ses->server->sec_mode & |
Jeff Layton | 4e53a3f | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 3926 | SECMODE_PW_ENCRYPT ? true : false, |
| 3927 | bcc_ptr); |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3928 | else |
| 3929 | #endif /* CIFS_WEAK_PW_HASH */ |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 3930 | rc = SMBNTencrypt(tcon->password, ses->server->cryptkey, |
Shirish Pargaonkar | 9ef5992 | 2011-10-20 13:21:59 -0500 | [diff] [blame] | 3931 | bcc_ptr, nls_codepage); |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3932 | |
Shirish Pargaonkar | 540b2e3 | 2011-01-18 22:33:54 -0600 | [diff] [blame] | 3933 | bcc_ptr += CIFS_AUTH_RESP_SIZE; |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 3934 | if (ses->capabilities & CAP_UNICODE) { |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 3935 | /* must align unicode strings */ |
| 3936 | *bcc_ptr = 0; /* null byte password */ |
| 3937 | bcc_ptr++; |
| 3938 | } |
Steve French | eeac804 | 2006-01-13 21:34:58 -0800 | [diff] [blame] | 3939 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3940 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 3941 | if (ses->server->sec_mode & |
Steve French | a878fb2 | 2006-05-30 18:04:19 +0000 | [diff] [blame] | 3942 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3943 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
| 3944 | |
| 3945 | if (ses->capabilities & CAP_STATUS32) { |
| 3946 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; |
| 3947 | } |
| 3948 | if (ses->capabilities & CAP_DFS) { |
| 3949 | smb_buffer->Flags2 |= SMBFLG2_DFS; |
| 3950 | } |
| 3951 | if (ses->capabilities & CAP_UNICODE) { |
| 3952 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; |
| 3953 | length = |
Steve French | acbbb76 | 2012-01-18 22:32:33 -0600 | [diff] [blame] | 3954 | cifs_strtoUTF16((__le16 *) bcc_ptr, tree, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3955 | 6 /* max utf8 char length in bytes */ * |
Steve French | a878fb2 | 2006-05-30 18:04:19 +0000 | [diff] [blame] | 3956 | (/* server len*/ + 256 /* share len */), nls_codepage); |
| 3957 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3958 | bcc_ptr += 2; /* skip trailing null */ |
| 3959 | } else { /* ASCII */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3960 | strcpy(bcc_ptr, tree); |
| 3961 | bcc_ptr += strlen(tree) + 1; |
| 3962 | } |
| 3963 | strcpy(bcc_ptr, "?????"); |
| 3964 | bcc_ptr += strlen("?????"); |
| 3965 | bcc_ptr += 1; |
| 3966 | count = bcc_ptr - &pSMB->Password[0]; |
Steve French | be8e3b0 | 2011-04-29 05:40:20 +0000 | [diff] [blame] | 3967 | pSMB->hdr.smb_buf_length = cpu_to_be32(be32_to_cpu( |
| 3968 | pSMB->hdr.smb_buf_length) + count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3969 | pSMB->ByteCount = cpu_to_le16(count); |
| 3970 | |
Steve French | 133672e | 2007-11-13 22:41:37 +0000 | [diff] [blame] | 3971 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
Jeff Layton | 7749981 | 2011-01-11 07:24:23 -0500 | [diff] [blame] | 3972 | 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3973 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3974 | /* above now done in SendReceive */ |
| 3975 | if ((rc == 0) && (tcon != NULL)) { |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 3976 | bool is_unicode; |
| 3977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3978 | tcon->tidStatus = CifsGood; |
Steve French | 3b79521 | 2008-11-13 19:45:32 +0000 | [diff] [blame] | 3979 | tcon->need_reconnect = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3980 | tcon->tid = smb_buffer_response->Tid; |
| 3981 | bcc_ptr = pByteArea(smb_buffer_response); |
Jeff Layton | 690c522 | 2011-01-20 13:36:51 -0500 | [diff] [blame] | 3982 | bytes_left = get_bcc(smb_buffer_response); |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3983 | length = strnlen(bcc_ptr, bytes_left - 2); |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 3984 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
| 3985 | is_unicode = true; |
| 3986 | else |
| 3987 | is_unicode = false; |
| 3988 | |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 3989 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 3990 | /* skip service field (NB: this field is always ASCII) */ |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 3991 | if (length == 3) { |
| 3992 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && |
| 3993 | (bcc_ptr[2] == 'C')) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 3994 | cFYI(1, "IPC connection"); |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 3995 | tcon->ipc = 1; |
| 3996 | } |
| 3997 | } else if (length == 2) { |
| 3998 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { |
| 3999 | /* the most common case */ |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 4000 | cFYI(1, "disk share connection"); |
Steve French | 7f8ed42 | 2007-09-28 22:28:55 +0000 | [diff] [blame] | 4001 | } |
| 4002 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 4003 | bcc_ptr += length + 1; |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 4004 | bytes_left -= (length + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4005 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 4006 | |
| 4007 | /* mostly informational -- no need to fail on error here */ |
Jeff Layton | 90a98b2 | 2009-07-20 13:40:52 -0400 | [diff] [blame] | 4008 | kfree(tcon->nativeFileSystem); |
Steve French | acbbb76 | 2012-01-18 22:32:33 -0600 | [diff] [blame] | 4009 | tcon->nativeFileSystem = cifs_strndup_from_utf16(bcc_ptr, |
Steve French | 0e0d2cf | 2009-05-01 05:27:32 +0000 | [diff] [blame] | 4010 | bytes_left, is_unicode, |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 4011 | nls_codepage); |
| 4012 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 4013 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
Jeff Layton | cc20c03 | 2009-04-30 07:16:21 -0400 | [diff] [blame] | 4014 | |
Steve French | fb8c4b1 | 2007-07-10 01:16:18 +0000 | [diff] [blame] | 4015 | if ((smb_buffer_response->WordCount == 3) || |
Steve French | 1a4e15a | 2006-10-12 21:33:51 +0000 | [diff] [blame] | 4016 | (smb_buffer_response->WordCount == 7)) |
| 4017 | /* field is in same location */ |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 4018 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
| 4019 | else |
| 4020 | tcon->Flags = 0; |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 4021 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4022 | } else if ((rc == 0) && tcon == NULL) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 4023 | /* all we need to save for IPC$ connection */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4024 | ses->ipc_tid = smb_buffer_response->Tid; |
| 4025 | } |
| 4026 | |
Mariusz Kozlowski | a8a11d3 | 2007-10-03 16:41:24 +0000 | [diff] [blame] | 4027 | cifs_buf_release(smb_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4028 | return rc; |
| 4029 | } |
| 4030 | |
Al Viro | 2a9b995 | 2011-06-17 09:27:16 -0400 | [diff] [blame] | 4031 | void |
| 4032 | cifs_umount(struct cifs_sb_info *cifs_sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4033 | { |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4034 | struct rb_root *root = &cifs_sb->tlink_tree; |
| 4035 | struct rb_node *node; |
| 4036 | struct tcon_link *tlink; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4037 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4038 | cancel_delayed_work_sync(&cifs_sb->prune_tlinks); |
| 4039 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4040 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4041 | while ((node = rb_first(root))) { |
| 4042 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); |
| 4043 | cifs_get_tlink(tlink); |
| 4044 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); |
| 4045 | rb_erase(node, root); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 4046 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4047 | spin_unlock(&cifs_sb->tlink_tree_lock); |
| 4048 | cifs_put_tlink(tlink); |
| 4049 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4050 | } |
| 4051 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4052 | |
Al Viro | dd85446 | 2011-06-17 08:24:42 -0400 | [diff] [blame] | 4053 | bdi_destroy(&cifs_sb->bdi); |
Al Viro | d757d71 | 2011-06-17 09:42:43 -0400 | [diff] [blame] | 4054 | kfree(cifs_sb->mountdata); |
| 4055 | unload_nls(cifs_sb->local_nls); |
| 4056 | kfree(cifs_sb); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 4057 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4058 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4059 | int cifs_negotiate_protocol(unsigned int xid, struct cifs_ses *ses) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4060 | { |
| 4061 | int rc = 0; |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4062 | struct TCP_Server_Info *server = ses->server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4063 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4064 | /* only send once per connect */ |
| 4065 | if (server->maxBuf != 0) |
| 4066 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4067 | |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 4068 | cifs_set_credits(server, 1); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4069 | rc = CIFSSMBNegotiate(xid, ses); |
| 4070 | if (rc == -EAGAIN) { |
| 4071 | /* retry only once on 1st time connection */ |
Pavel Shilovsky | 2d86dbc | 2012-02-06 15:59:18 +0400 | [diff] [blame] | 4072 | cifs_set_credits(server, 1); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4073 | rc = CIFSSMBNegotiate(xid, ses); |
| 4074 | if (rc == -EAGAIN) |
| 4075 | rc = -EHOSTDOWN; |
| 4076 | } |
| 4077 | if (rc == 0) { |
| 4078 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 7fdbaa1 | 2011-06-10 16:14:57 -0400 | [diff] [blame] | 4079 | if (server->tcpStatus == CifsNeedNegotiate) |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4080 | server->tcpStatus = CifsGood; |
| 4081 | else |
| 4082 | rc = -EHOSTDOWN; |
| 4083 | spin_unlock(&GlobalMid_Lock); |
| 4084 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4085 | } |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 4086 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4087 | return rc; |
| 4088 | } |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 4089 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4090 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4091 | int cifs_setup_session(unsigned int xid, struct cifs_ses *ses, |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4092 | struct nls_table *nls_info) |
| 4093 | { |
| 4094 | int rc = 0; |
| 4095 | struct TCP_Server_Info *server = ses->server; |
| 4096 | |
| 4097 | ses->flags = 0; |
| 4098 | ses->capabilities = server->capabilities; |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 4099 | if (linuxExtEnabled == 0) |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4100 | ses->capabilities &= (~CAP_UNIX); |
Steve French | 20418ac | 2009-04-30 16:13:32 +0000 | [diff] [blame] | 4101 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 4102 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4103 | server->sec_mode, server->capabilities, server->timeAdj); |
Jeff Layton | cb7691b | 2008-08-18 15:41:05 -0400 | [diff] [blame] | 4104 | |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4105 | rc = CIFS_SessSetup(xid, ses, nls_info); |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 4106 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 4107 | cERROR(1, "Send error in SessSetup = %d", rc); |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 4108 | } else { |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 4109 | mutex_lock(&ses->server->srv_mutex); |
| 4110 | if (!server->session_estab) { |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 4111 | server->session_key.response = ses->auth_key.response; |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 4112 | server->session_key.len = ses->auth_key.len; |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 4113 | server->sequence_number = 0x2; |
| 4114 | server->session_estab = true; |
| 4115 | ses->auth_key.response = NULL; |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 4116 | } |
| 4117 | mutex_unlock(&server->srv_mutex); |
| 4118 | |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 4119 | cFYI(1, "CIFS Session Established successfully"); |
Steve French | 20418ac | 2009-04-30 16:13:32 +0000 | [diff] [blame] | 4120 | spin_lock(&GlobalMid_Lock); |
Jeff Layton | 198b568 | 2010-04-24 07:57:48 -0400 | [diff] [blame] | 4121 | ses->status = CifsGood; |
| 4122 | ses->need_reconnect = false; |
Steve French | 20418ac | 2009-04-30 16:13:32 +0000 | [diff] [blame] | 4123 | spin_unlock(&GlobalMid_Lock); |
Steve French | 26b994f | 2008-08-06 05:11:33 +0000 | [diff] [blame] | 4124 | } |
| 4125 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 4126 | kfree(ses->auth_key.response); |
| 4127 | ses->auth_key.response = NULL; |
| 4128 | ses->auth_key.len = 0; |
Shirish Pargaonkar | d3686d5 | 2010-10-28 09:53:07 -0500 | [diff] [blame] | 4129 | kfree(ses->ntlmssp); |
| 4130 | ses->ntlmssp = NULL; |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 4131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4132 | return rc; |
| 4133 | } |
| 4134 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 4135 | static int |
| 4136 | cifs_set_vol_auth(struct smb_vol *vol, struct cifs_ses *ses) |
| 4137 | { |
| 4138 | switch (ses->server->secType) { |
| 4139 | case Kerberos: |
| 4140 | vol->secFlg = CIFSSEC_MUST_KRB5; |
| 4141 | return 0; |
| 4142 | case NTLMv2: |
| 4143 | vol->secFlg = CIFSSEC_MUST_NTLMV2; |
| 4144 | break; |
| 4145 | case NTLM: |
| 4146 | vol->secFlg = CIFSSEC_MUST_NTLM; |
| 4147 | break; |
| 4148 | case RawNTLMSSP: |
| 4149 | vol->secFlg = CIFSSEC_MUST_NTLMSSP; |
| 4150 | break; |
| 4151 | case LANMAN: |
| 4152 | vol->secFlg = CIFSSEC_MUST_LANMAN; |
| 4153 | break; |
| 4154 | } |
| 4155 | |
| 4156 | return cifs_set_cifscreds(vol, ses); |
| 4157 | } |
| 4158 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4159 | static struct cifs_tcon * |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4160 | cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid) |
| 4161 | { |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 4162 | int rc; |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4163 | struct cifs_tcon *master_tcon = cifs_sb_master_tcon(cifs_sb); |
| 4164 | struct cifs_ses *ses; |
| 4165 | struct cifs_tcon *tcon = NULL; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4166 | struct smb_vol *vol_info; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4167 | |
| 4168 | vol_info = kzalloc(sizeof(*vol_info), GFP_KERNEL); |
Dan Carpenter | 803ab97 | 2012-01-24 11:39:22 +0300 | [diff] [blame] | 4169 | if (vol_info == NULL) |
| 4170 | return ERR_PTR(-ENOMEM); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4171 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4172 | vol_info->local_nls = cifs_sb->local_nls; |
| 4173 | vol_info->linux_uid = fsuid; |
| 4174 | vol_info->cred_uid = fsuid; |
| 4175 | vol_info->UNC = master_tcon->treeName; |
| 4176 | vol_info->retry = master_tcon->retry; |
| 4177 | vol_info->nocase = master_tcon->nocase; |
| 4178 | vol_info->local_lease = master_tcon->local_lease; |
| 4179 | vol_info->no_linux_ext = !master_tcon->unix_ext; |
| 4180 | |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 4181 | rc = cifs_set_vol_auth(vol_info, master_tcon->ses); |
| 4182 | if (rc) { |
| 4183 | tcon = ERR_PTR(rc); |
| 4184 | goto out; |
| 4185 | } |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4186 | |
| 4187 | /* get a reference for the same TCP session */ |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 4188 | spin_lock(&cifs_tcp_ses_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4189 | ++master_tcon->ses->server->srv_count; |
Suresh Jayaraman | 3f9bcca | 2010-10-18 23:29:37 +0530 | [diff] [blame] | 4190 | spin_unlock(&cifs_tcp_ses_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4191 | |
| 4192 | ses = cifs_get_smb_ses(master_tcon->ses->server, vol_info); |
| 4193 | if (IS_ERR(ses)) { |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4194 | tcon = (struct cifs_tcon *)ses; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4195 | cifs_put_tcp_session(master_tcon->ses->server); |
| 4196 | goto out; |
| 4197 | } |
| 4198 | |
| 4199 | tcon = cifs_get_tcon(ses, vol_info); |
| 4200 | if (IS_ERR(tcon)) { |
| 4201 | cifs_put_smb_ses(ses); |
| 4202 | goto out; |
| 4203 | } |
| 4204 | |
| 4205 | if (ses->capabilities & CAP_UNIX) |
| 4206 | reset_cifs_unix_caps(0, tcon, NULL, vol_info); |
| 4207 | out: |
Jeff Layton | 8a8798a | 2012-01-17 16:09:15 -0500 | [diff] [blame] | 4208 | kfree(vol_info->username); |
| 4209 | kfree(vol_info->password); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4210 | kfree(vol_info); |
| 4211 | |
| 4212 | return tcon; |
| 4213 | } |
| 4214 | |
Steve French | 96daf2b | 2011-05-27 04:34:02 +0000 | [diff] [blame] | 4215 | struct cifs_tcon * |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4216 | cifs_sb_master_tcon(struct cifs_sb_info *cifs_sb) |
| 4217 | { |
| 4218 | return tlink_tcon(cifs_sb_master_tlink(cifs_sb)); |
| 4219 | } |
| 4220 | |
| 4221 | static int |
| 4222 | cifs_sb_tcon_pending_wait(void *unused) |
| 4223 | { |
| 4224 | schedule(); |
| 4225 | return signal_pending(current) ? -ERESTARTSYS : 0; |
| 4226 | } |
| 4227 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4228 | /* find and return a tlink with given uid */ |
| 4229 | static struct tcon_link * |
| 4230 | tlink_rb_search(struct rb_root *root, uid_t uid) |
| 4231 | { |
| 4232 | struct rb_node *node = root->rb_node; |
| 4233 | struct tcon_link *tlink; |
| 4234 | |
| 4235 | while (node) { |
| 4236 | tlink = rb_entry(node, struct tcon_link, tl_rbnode); |
| 4237 | |
| 4238 | if (tlink->tl_uid > uid) |
| 4239 | node = node->rb_left; |
| 4240 | else if (tlink->tl_uid < uid) |
| 4241 | node = node->rb_right; |
| 4242 | else |
| 4243 | return tlink; |
| 4244 | } |
| 4245 | return NULL; |
| 4246 | } |
| 4247 | |
| 4248 | /* insert a tcon_link into the tree */ |
| 4249 | static void |
| 4250 | tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink) |
| 4251 | { |
| 4252 | struct rb_node **new = &(root->rb_node), *parent = NULL; |
| 4253 | struct tcon_link *tlink; |
| 4254 | |
| 4255 | while (*new) { |
| 4256 | tlink = rb_entry(*new, struct tcon_link, tl_rbnode); |
| 4257 | parent = *new; |
| 4258 | |
| 4259 | if (tlink->tl_uid > new_tlink->tl_uid) |
| 4260 | new = &((*new)->rb_left); |
| 4261 | else |
| 4262 | new = &((*new)->rb_right); |
| 4263 | } |
| 4264 | |
| 4265 | rb_link_node(&new_tlink->tl_rbnode, parent, new); |
| 4266 | rb_insert_color(&new_tlink->tl_rbnode, root); |
| 4267 | } |
| 4268 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4269 | /* |
| 4270 | * Find or construct an appropriate tcon given a cifs_sb and the fsuid of the |
| 4271 | * current task. |
| 4272 | * |
| 4273 | * If the superblock doesn't refer to a multiuser mount, then just return |
| 4274 | * the master tcon for the mount. |
| 4275 | * |
Suresh Jayaraman | 6ef933a | 2010-11-03 10:53:49 +0530 | [diff] [blame] | 4276 | * 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] | 4277 | * exists, then check to see if it's pending construction. If it is then wait |
| 4278 | * for construction to complete. Once it's no longer pending, check to see if |
| 4279 | * it failed and either return an error or retry construction, depending on |
| 4280 | * the timeout. |
| 4281 | * |
| 4282 | * If one doesn't exist then insert a new tcon_link struct into the tree and |
| 4283 | * try to construct a new one. |
| 4284 | */ |
| 4285 | struct tcon_link * |
| 4286 | cifs_sb_tlink(struct cifs_sb_info *cifs_sb) |
| 4287 | { |
| 4288 | int ret; |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4289 | uid_t fsuid = current_fsuid(); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4290 | struct tcon_link *tlink, *newtlink; |
| 4291 | |
| 4292 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)) |
| 4293 | return cifs_get_tlink(cifs_sb_master_tlink(cifs_sb)); |
| 4294 | |
| 4295 | spin_lock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4296 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4297 | if (tlink) |
| 4298 | cifs_get_tlink(tlink); |
| 4299 | spin_unlock(&cifs_sb->tlink_tree_lock); |
| 4300 | |
| 4301 | if (tlink == NULL) { |
| 4302 | newtlink = kzalloc(sizeof(*tlink), GFP_KERNEL); |
| 4303 | if (newtlink == NULL) |
| 4304 | return ERR_PTR(-ENOMEM); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4305 | newtlink->tl_uid = fsuid; |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4306 | newtlink->tl_tcon = ERR_PTR(-EACCES); |
| 4307 | set_bit(TCON_LINK_PENDING, &newtlink->tl_flags); |
| 4308 | set_bit(TCON_LINK_IN_TREE, &newtlink->tl_flags); |
| 4309 | cifs_get_tlink(newtlink); |
| 4310 | |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4311 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4312 | /* was one inserted after previous search? */ |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4313 | tlink = tlink_rb_search(&cifs_sb->tlink_tree, fsuid); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4314 | if (tlink) { |
| 4315 | cifs_get_tlink(tlink); |
| 4316 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4317 | kfree(newtlink); |
| 4318 | goto wait_for_construction; |
| 4319 | } |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4320 | tlink = newtlink; |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4321 | tlink_rb_insert(&cifs_sb->tlink_tree, tlink); |
| 4322 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 9d002df | 2010-10-06 19:51:11 -0400 | [diff] [blame] | 4323 | } else { |
| 4324 | wait_for_construction: |
| 4325 | ret = wait_on_bit(&tlink->tl_flags, TCON_LINK_PENDING, |
| 4326 | cifs_sb_tcon_pending_wait, |
| 4327 | TASK_INTERRUPTIBLE); |
| 4328 | if (ret) { |
| 4329 | cifs_put_tlink(tlink); |
| 4330 | return ERR_PTR(ret); |
| 4331 | } |
| 4332 | |
| 4333 | /* if it's good, return it */ |
| 4334 | if (!IS_ERR(tlink->tl_tcon)) |
| 4335 | return tlink; |
| 4336 | |
| 4337 | /* return error if we tried this already recently */ |
| 4338 | if (time_before(jiffies, tlink->tl_time + TLINK_ERROR_EXPIRE)) { |
| 4339 | cifs_put_tlink(tlink); |
| 4340 | return ERR_PTR(-EACCES); |
| 4341 | } |
| 4342 | |
| 4343 | if (test_and_set_bit(TCON_LINK_PENDING, &tlink->tl_flags)) |
| 4344 | goto wait_for_construction; |
| 4345 | } |
| 4346 | |
| 4347 | tlink->tl_tcon = cifs_construct_tcon(cifs_sb, fsuid); |
| 4348 | clear_bit(TCON_LINK_PENDING, &tlink->tl_flags); |
| 4349 | wake_up_bit(&tlink->tl_flags, TCON_LINK_PENDING); |
| 4350 | |
| 4351 | if (IS_ERR(tlink->tl_tcon)) { |
| 4352 | cifs_put_tlink(tlink); |
| 4353 | return ERR_PTR(-EACCES); |
| 4354 | } |
| 4355 | |
| 4356 | return tlink; |
| 4357 | } |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4358 | |
| 4359 | /* |
| 4360 | * periodic workqueue job that scans tcon_tree for a superblock and closes |
| 4361 | * out tcons. |
| 4362 | */ |
| 4363 | static void |
| 4364 | cifs_prune_tlinks(struct work_struct *work) |
| 4365 | { |
| 4366 | struct cifs_sb_info *cifs_sb = container_of(work, struct cifs_sb_info, |
| 4367 | prune_tlinks.work); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4368 | struct rb_root *root = &cifs_sb->tlink_tree; |
| 4369 | struct rb_node *node = rb_first(root); |
| 4370 | struct rb_node *tmp; |
| 4371 | struct tcon_link *tlink; |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4372 | |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4373 | /* |
| 4374 | * Because we drop the spinlock in the loop in order to put the tlink |
| 4375 | * it's not guarded against removal of links from the tree. The only |
| 4376 | * places that remove entries from the tree are this function and |
| 4377 | * umounts. Because this function is non-reentrant and is canceled |
| 4378 | * before umount can proceed, this is safe. |
| 4379 | */ |
| 4380 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4381 | node = rb_first(root); |
| 4382 | while (node != NULL) { |
| 4383 | tmp = node; |
| 4384 | node = rb_next(tmp); |
| 4385 | tlink = rb_entry(tmp, struct tcon_link, tl_rbnode); |
| 4386 | |
| 4387 | if (test_bit(TCON_LINK_MASTER, &tlink->tl_flags) || |
| 4388 | atomic_read(&tlink->tl_count) != 0 || |
| 4389 | time_after(tlink->tl_time + TLINK_IDLE_EXPIRE, jiffies)) |
| 4390 | continue; |
| 4391 | |
| 4392 | cifs_get_tlink(tlink); |
| 4393 | clear_bit(TCON_LINK_IN_TREE, &tlink->tl_flags); |
| 4394 | rb_erase(tmp, root); |
| 4395 | |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4396 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | b647c35 | 2010-10-28 11:16:44 -0400 | [diff] [blame] | 4397 | cifs_put_tlink(tlink); |
| 4398 | spin_lock(&cifs_sb->tlink_tree_lock); |
| 4399 | } |
| 4400 | spin_unlock(&cifs_sb->tlink_tree_lock); |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4401 | |
Jeff Layton | da472fc | 2012-03-23 14:40:53 -0400 | [diff] [blame] | 4402 | queue_delayed_work(cifsiod_wq, &cifs_sb->prune_tlinks, |
Jeff Layton | 2de970f | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 4403 | TLINK_IDLE_EXPIRE); |
| 4404 | } |