Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/cifsfs.c |
| 3 | * |
Steve French | 2b280fa | 2008-05-17 03:12:45 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 6 | * |
| 7 | * Common Internet FileSystem (CIFS) client |
| 8 | * |
| 9 | * This library is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU Lesser General Public License as published |
| 11 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This library is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 17 | * the GNU Lesser General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU Lesser General Public License |
| 20 | * along with this library; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | /* Note that BB means BUGBUG (ie something to fix eventually) */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/fs.h> |
| 28 | #include <linux/mount.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/list.h> |
| 32 | #include <linux/seq_file.h> |
| 33 | #include <linux/vfs.h> |
| 34 | #include <linux/mempool.h> |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 35 | #include <linux/delay.h> |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 36 | #include <linux/kthread.h> |
Nigel Cunningham | 7dfb710 | 2006-12-06 20:34:23 -0800 | [diff] [blame] | 37 | #include <linux/freezer.h> |
Alessio Igor Bogani | 67e5520 | 2009-04-24 09:06:53 +0200 | [diff] [blame] | 38 | #include <linux/smp_lock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "cifsfs.h" |
| 40 | #include "cifspdu.h" |
| 41 | #define DECLARE_GLOBALS_HERE |
| 42 | #include "cifsglob.h" |
| 43 | #include "cifsproto.h" |
| 44 | #include "cifs_debug.h" |
| 45 | #include "cifs_fs_sb.h" |
| 46 | #include <linux/mm.h> |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 47 | #include <linux/key-type.h> |
Steve French | 6103335 | 2008-01-09 16:21:36 +0000 | [diff] [blame] | 48 | #include "dns_resolve.h" |
Jeff Layton | e545937 | 2007-11-03 05:11:06 +0000 | [diff] [blame] | 49 | #include "cifs_spnego.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
| 51 | |
| 52 | #ifdef CONFIG_CIFS_QUOTA |
Alexey Dobriyan | 0d54b21 | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 53 | static const struct quotactl_ops cifs_quotactl_ops; |
Steve French | 35c11fd | 2007-02-27 05:09:35 +0000 | [diff] [blame] | 54 | #endif /* QUOTA */ |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | int cifsFYI = 0; |
| 57 | int cifsERROR = 1; |
| 58 | int traceSMB = 0; |
| 59 | unsigned int oplockEnabled = 1; |
| 60 | unsigned int experimEnabled = 0; |
| 61 | unsigned int linuxExtEnabled = 1; |
| 62 | unsigned int lookupCacheEnabled = 1; |
| 63 | unsigned int multiuser_mount = 0; |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 64 | unsigned int extended_security = CIFSSEC_DEF; |
| 65 | /* unsigned int ntlmv2_support = 0; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | unsigned int sign_CIFS_PDUs = 1; |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 67 | static const struct super_operations cifs_super_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
| 69 | module_param(CIFSMaxBufSize, int, 0); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 70 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
| 71 | "Default: 16384 Range: 8192 to 130048"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
| 73 | module_param(cifs_min_rcv, int, 0); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 74 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
| 75 | "1 to 64"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | unsigned int cifs_min_small = 30; |
| 77 | module_param(cifs_min_small, int, 0); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 78 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
| 79 | "Range: 2 to 256"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
| 81 | module_param(cifs_max_pending, int, 0); |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 82 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
| 83 | "Default: 50 Range: 2 to 256"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | extern mempool_t *cifs_sm_req_poolp; |
| 86 | extern mempool_t *cifs_req_poolp; |
| 87 | extern mempool_t *cifs_mid_poolp; |
| 88 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 89 | extern struct kmem_cache *cifs_oplock_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | static int |
| 92 | cifs_read_super(struct super_block *sb, void *data, |
| 93 | const char *devname, int silent) |
| 94 | { |
| 95 | struct inode *inode; |
| 96 | struct cifs_sb_info *cifs_sb; |
| 97 | int rc = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 98 | |
Steve French | 1b2b212 | 2007-02-17 04:30:54 +0000 | [diff] [blame] | 99 | /* BB should we make this contingent on mount parm? */ |
| 100 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 101 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | cifs_sb = CIFS_SB(sb); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 103 | if (cifs_sb == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
Jens Axboe | 8044f7f | 2010-04-22 12:09:48 +0200 | [diff] [blame] | 106 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); |
| 107 | if (rc) { |
| 108 | kfree(cifs_sb); |
| 109 | return rc; |
| 110 | } |
| 111 | |
Igor Mammedov | e6ab158 | 2008-01-11 01:49:48 +0000 | [diff] [blame] | 112 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 113 | /* copy mount params to sb for use in submounts */ |
| 114 | /* BB: should we move this after the mount so we |
| 115 | * do not have to do the copy on failed mounts? |
| 116 | * BB: May be it is better to do simple copy before |
| 117 | * complex operation (mount), and in case of fail |
| 118 | * just exit instead of doing mount and attempting |
| 119 | * undo it if this copy fails?*/ |
Steve French | 79ee9a8 | 2008-06-10 21:37:02 +0000 | [diff] [blame] | 120 | if (data) { |
| 121 | int len = strlen(data); |
| 122 | cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); |
| 123 | if (cifs_sb->mountdata == NULL) { |
Jens Axboe | 8044f7f | 2010-04-22 12:09:48 +0200 | [diff] [blame] | 124 | bdi_destroy(&cifs_sb->bdi); |
Steve French | 79ee9a8 | 2008-06-10 21:37:02 +0000 | [diff] [blame] | 125 | kfree(sb->s_fs_info); |
| 126 | sb->s_fs_info = NULL; |
| 127 | return -ENOMEM; |
| 128 | } |
| 129 | strncpy(cifs_sb->mountdata, data, len + 1); |
| 130 | cifs_sb->mountdata[len] = '\0'; |
Igor Mammedov | e6ab158 | 2008-01-11 01:49:48 +0000 | [diff] [blame] | 131 | } |
Igor Mammedov | e6ab158 | 2008-01-11 01:49:48 +0000 | [diff] [blame] | 132 | #endif |
| 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | rc = cifs_mount(sb, cifs_sb, data, devname); |
| 135 | |
| 136 | if (rc) { |
| 137 | if (!silent) |
| 138 | cERROR(1, |
| 139 | ("cifs_mount failed w/return code = %d", rc)); |
| 140 | goto out_mount_failed; |
| 141 | } |
| 142 | |
| 143 | sb->s_magic = CIFS_MAGIC_NUMBER; |
| 144 | sb->s_op = &cifs_super_ops; |
Jens Axboe | 8044f7f | 2010-04-22 12:09:48 +0200 | [diff] [blame] | 145 | sb->s_bdi = &cifs_sb->bdi; |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 146 | /* if (cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 147 | sb->s_blocksize = |
| 148 | cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | #ifdef CONFIG_CIFS_QUOTA |
| 150 | sb->s_qcop = &cifs_quotactl_ops; |
| 151 | #endif |
| 152 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
| 153 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ |
Jeff Layton | bd433d4 | 2009-05-27 09:37:34 -0400 | [diff] [blame] | 154 | inode = cifs_root_iget(sb, ROOT_I); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
David Howells | ce634ab | 2008-02-07 00:15:33 -0800 | [diff] [blame] | 156 | if (IS_ERR(inode)) { |
| 157 | rc = PTR_ERR(inode); |
| 158 | inode = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | goto out_no_root; |
| 160 | } |
| 161 | |
| 162 | sb->s_root = d_alloc_root(inode); |
| 163 | |
| 164 | if (!sb->s_root) { |
| 165 | rc = -ENOMEM; |
| 166 | goto out_no_root; |
| 167 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 168 | |
Steve French | 7521a3c | 2007-07-11 18:30:34 +0000 | [diff] [blame] | 169 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 170 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| 171 | cFYI(1, ("export ops supported")); |
| 172 | sb->s_export_op = &cifs_export_ops; |
| 173 | } |
| 174 | #endif /* EXPERIMENTAL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
| 176 | return 0; |
| 177 | |
| 178 | out_no_root: |
| 179 | cERROR(1, ("cifs_read_super: get root inode failed")); |
| 180 | if (inode) |
| 181 | iput(inode); |
Steve French | 54b4602 | 2008-08-11 22:31:40 +0000 | [diff] [blame] | 182 | |
Steve French | 2c731af | 2008-08-11 22:28:53 +0000 | [diff] [blame] | 183 | cifs_umount(sb, cifs_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | out_mount_failed: |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 186 | if (cifs_sb) { |
Igor Mammedov | e6ab158 | 2008-01-11 01:49:48 +0000 | [diff] [blame] | 187 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 188 | if (cifs_sb->mountdata) { |
| 189 | kfree(cifs_sb->mountdata); |
| 190 | cifs_sb->mountdata = NULL; |
| 191 | } |
| 192 | #endif |
Thomas Gleixner | 6d729e4 | 2009-08-16 21:05:08 +0000 | [diff] [blame] | 193 | unload_nls(cifs_sb->local_nls); |
Jens Axboe | 8044f7f | 2010-04-22 12:09:48 +0200 | [diff] [blame] | 194 | bdi_destroy(&cifs_sb->bdi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | kfree(cifs_sb); |
| 196 | } |
| 197 | return rc; |
| 198 | } |
| 199 | |
| 200 | static void |
| 201 | cifs_put_super(struct super_block *sb) |
| 202 | { |
| 203 | int rc = 0; |
| 204 | struct cifs_sb_info *cifs_sb; |
| 205 | |
| 206 | cFYI(1, ("In cifs_put_super")); |
| 207 | cifs_sb = CIFS_SB(sb); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 208 | if (cifs_sb == NULL) { |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 209 | cFYI(1, ("Empty cifs superblock info passed to unmount")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | return; |
| 211 | } |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame] | 212 | |
| 213 | lock_kernel(); |
| 214 | |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 215 | rc = cifs_umount(sb, cifs_sb); |
Steve French | ad7a292 | 2008-02-07 23:25:02 +0000 | [diff] [blame] | 216 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | cERROR(1, ("cifs_umount failed with return code %d", rc)); |
Igor Mammedov | e6ab158 | 2008-01-11 01:49:48 +0000 | [diff] [blame] | 218 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 219 | if (cifs_sb->mountdata) { |
| 220 | kfree(cifs_sb->mountdata); |
| 221 | cifs_sb->mountdata = NULL; |
| 222 | } |
| 223 | #endif |
| 224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | unload_nls(cifs_sb->local_nls); |
Jens Axboe | 8044f7f | 2010-04-22 12:09:48 +0200 | [diff] [blame] | 226 | bdi_destroy(&cifs_sb->bdi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | kfree(cifs_sb); |
Christoph Hellwig | 6cfd014 | 2009-05-05 15:40:36 +0200 | [diff] [blame] | 228 | |
| 229 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | static int |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 233 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 235 | struct super_block *sb = dentry->d_sb; |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 236 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 237 | struct cifsTconInfo *tcon = cifs_sb->tcon; |
Steve French | c81156d | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 238 | int rc = -EOPNOTSUPP; |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 239 | int xid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
| 241 | xid = GetXid(); |
| 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | buf->f_type = CIFS_MAGIC_NUMBER; |
| 244 | |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 245 | /* |
| 246 | * PATH_MAX may be too long - it would presumably be total path, |
| 247 | * but note that some servers (includinng Samba 3) have a shorter |
| 248 | * maximum path. |
| 249 | * |
| 250 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. |
| 251 | */ |
| 252 | buf->f_namelen = PATH_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | buf->f_files = 0; /* undefined */ |
| 254 | buf->f_ffree = 0; /* unlimited */ |
| 255 | |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 256 | /* |
| 257 | * We could add a second check for a QFS Unix capability bit |
| 258 | */ |
| 259 | if ((tcon->ses->capabilities & CAP_UNIX) && |
| 260 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) |
| 261 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 263 | /* |
| 264 | * Only need to call the old QFSInfo if failed on newer one, |
| 265 | * e.g. by OS/2. |
| 266 | **/ |
| 267 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) |
| 268 | rc = CIFSSMBQFSInfo(xid, tcon, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 270 | /* |
| 271 | * Some old Windows servers also do not support level 103, retry with |
| 272 | * older level one if old server failed the previous call or we |
| 273 | * bypassed it because we detected that this was an older LANMAN sess |
| 274 | */ |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 275 | if (rc) |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 276 | rc = SMBOldQFSInfo(xid, tcon, buf); |
| 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | FreeXid(xid); |
Steve French | 39da984 | 2008-04-28 04:04:34 +0000 | [diff] [blame] | 279 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 282 | static int cifs_permission(struct inode *inode, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | { |
| 284 | struct cifs_sb_info *cifs_sb; |
| 285 | |
| 286 | cifs_sb = CIFS_SB(inode->i_sb); |
| 287 | |
Miklos Szeredi | f696a36 | 2008-07-31 13:41:58 +0200 | [diff] [blame] | 288 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
| 289 | if ((mask & MAY_EXEC) && !execute_ok(inode)) |
| 290 | return -EACCES; |
| 291 | else |
| 292 | return 0; |
| 293 | } else /* file mode might have been restricted at mount time |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 294 | on the client (above and beyond ACL on servers) for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | servers which do not support setting and viewing mode bits, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 296 | so allowing client to check permissions is useful */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | return generic_permission(inode, mask, NULL); |
| 298 | } |
| 299 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 300 | static struct kmem_cache *cifs_inode_cachep; |
| 301 | static struct kmem_cache *cifs_req_cachep; |
| 302 | static struct kmem_cache *cifs_mid_cachep; |
| 303 | struct kmem_cache *cifs_oplock_cachep; |
| 304 | static struct kmem_cache *cifs_sm_req_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | mempool_t *cifs_sm_req_poolp; |
| 306 | mempool_t *cifs_req_poolp; |
| 307 | mempool_t *cifs_mid_poolp; |
| 308 | |
| 309 | static struct inode * |
| 310 | cifs_alloc_inode(struct super_block *sb) |
| 311 | { |
| 312 | struct cifsInodeInfo *cifs_inode; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 313 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | if (!cifs_inode) |
| 315 | return NULL; |
| 316 | cifs_inode->cifsAttrs = 0x20; /* default */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | cifs_inode->time = 0; |
Jeff Layton | cea2180 | 2007-11-20 23:19:03 +0000 | [diff] [blame] | 318 | cifs_inode->write_behind_rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | /* Until the file is open and we have gotten oplock |
| 320 | info back from the server, can not assume caching of |
| 321 | file data or metadata */ |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 322 | cifs_inode->clientCanCacheRead = false; |
| 323 | cifs_inode->clientCanCacheAll = false; |
Jeff Layton | 9a8165f | 2008-10-17 21:03:20 -0400 | [diff] [blame] | 324 | cifs_inode->delete_pending = false; |
Jeff Layton | df2cf17 | 2010-02-12 07:44:16 -0500 | [diff] [blame] | 325 | cifs_inode->invalid_mapping = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
Jeff Layton | fbec9ab | 2009-04-03 13:44:00 -0400 | [diff] [blame] | 327 | cifs_inode->server_eof = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 328 | |
Steve French | 1b2b212 | 2007-02-17 04:30:54 +0000 | [diff] [blame] | 329 | /* Can not set i_flags here - they get immediately overwritten |
| 330 | to zero by the VFS */ |
| 331 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
| 333 | return &cifs_inode->vfs_inode; |
| 334 | } |
| 335 | |
| 336 | static void |
| 337 | cifs_destroy_inode(struct inode *inode) |
| 338 | { |
| 339 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
| 340 | } |
| 341 | |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 342 | static void |
| 343 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) |
| 344 | { |
| 345 | seq_printf(s, ",addr="); |
| 346 | |
| 347 | switch (server->addr.sockAddr.sin_family) { |
| 348 | case AF_INET: |
| 349 | seq_printf(s, "%pI4", &server->addr.sockAddr.sin_addr.s_addr); |
| 350 | break; |
| 351 | case AF_INET6: |
| 352 | seq_printf(s, "%pI6", |
| 353 | &server->addr.sockAddr6.sin6_addr.s6_addr); |
| 354 | if (server->addr.sockAddr6.sin6_scope_id) |
| 355 | seq_printf(s, "%%%u", |
| 356 | server->addr.sockAddr6.sin6_scope_id); |
| 357 | break; |
| 358 | default: |
| 359 | seq_printf(s, "(unknown)"); |
| 360 | } |
| 361 | } |
| 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | /* |
| 364 | * cifs_show_options() is for displaying mount options in /proc/mounts. |
| 365 | * Not all settable options are displayed but most of the important |
| 366 | * ones are. |
| 367 | */ |
| 368 | static int |
| 369 | cifs_show_options(struct seq_file *s, struct vfsmount *m) |
| 370 | { |
Jeff Layton | 8e047d0 | 2009-08-28 10:11:10 -0400 | [diff] [blame] | 371 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); |
| 372 | struct cifsTconInfo *tcon = cifs_sb->tcon; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Jeff Layton | 8e047d0 | 2009-08-28 10:11:10 -0400 | [diff] [blame] | 374 | seq_printf(s, ",unc=%s", tcon->treeName); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 375 | if (tcon->ses->userName) |
| 376 | seq_printf(s, ",username=%s", tcon->ses->userName); |
| 377 | if (tcon->ses->domainName) |
| 378 | seq_printf(s, ",domain=%s", tcon->ses->domainName); |
| 379 | |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 380 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
Jeff Layton | 340481a3 | 2009-06-11 10:27:29 -0400 | [diff] [blame] | 381 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
| 382 | seq_printf(s, ",forceuid"); |
Jeff Layton | 4486d6e | 2009-08-03 12:45:10 -0400 | [diff] [blame] | 383 | else |
| 384 | seq_printf(s, ",noforceuid"); |
Jeff Layton | 340481a3 | 2009-06-11 10:27:29 -0400 | [diff] [blame] | 385 | |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 386 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
Jeff Layton | 340481a3 | 2009-06-11 10:27:29 -0400 | [diff] [blame] | 387 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
| 388 | seq_printf(s, ",forcegid"); |
Jeff Layton | 4486d6e | 2009-08-03 12:45:10 -0400 | [diff] [blame] | 389 | else |
| 390 | seq_printf(s, ",noforcegid"); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 391 | |
Jeff Layton | 61f98ff | 2009-06-11 10:27:32 -0400 | [diff] [blame] | 392 | cifs_show_address(s, tcon->ses->server); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 393 | |
| 394 | if (!tcon->unix_ext) |
| 395 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", |
Steve French | 2b280fa | 2008-05-17 03:12:45 +0000 | [diff] [blame] | 396 | cifs_sb->mnt_file_mode, |
| 397 | cifs_sb->mnt_dir_mode); |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 398 | if (tcon->seal) |
| 399 | seq_printf(s, ",seal"); |
| 400 | if (tcon->nocase) |
| 401 | seq_printf(s, ",nocase"); |
| 402 | if (tcon->retry) |
| 403 | seq_printf(s, ",hard"); |
| 404 | if (cifs_sb->prepath) |
| 405 | seq_printf(s, ",prepath=%s", cifs_sb->prepath); |
| 406 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
| 407 | seq_printf(s, ",posixpaths"); |
| 408 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) |
| 409 | seq_printf(s, ",setuids"); |
| 410 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
| 411 | seq_printf(s, ",serverino"); |
| 412 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) |
| 413 | seq_printf(s, ",directio"); |
| 414 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
| 415 | seq_printf(s, ",nouser_xattr"); |
| 416 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
| 417 | seq_printf(s, ",mapchars"); |
| 418 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) |
| 419 | seq_printf(s, ",sfu"); |
| 420 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
| 421 | seq_printf(s, ",nobrl"); |
| 422 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
| 423 | seq_printf(s, ",cifsacl"); |
| 424 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
| 425 | seq_printf(s, ",dynperm"); |
| 426 | if (m->mnt_sb->s_flags & MS_POSIXACL) |
| 427 | seq_printf(s, ",acl"); |
Steve French | 2b280fa | 2008-05-17 03:12:45 +0000 | [diff] [blame] | 428 | |
Jeff Layton | 8616e0f | 2009-06-11 10:27:28 -0400 | [diff] [blame] | 429 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); |
| 430 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); |
| 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | return 0; |
| 433 | } |
| 434 | |
| 435 | #ifdef CONFIG_CIFS_QUOTA |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 436 | int cifs_xquota_set(struct super_block *sb, int quota_type, qid_t qid, |
| 437 | struct fs_disk_quota *pdquota) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | { |
| 439 | int xid; |
| 440 | int rc = 0; |
| 441 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 442 | struct cifsTconInfo *pTcon; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 443 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 444 | if (cifs_sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | pTcon = cifs_sb->tcon; |
| 446 | else |
| 447 | return -EIO; |
| 448 | |
| 449 | |
| 450 | xid = GetXid(); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 451 | if (pTcon) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 452 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 453 | } else |
Cyrill Gorcunov | 95ba736 | 2007-08-24 00:23:36 +0000 | [diff] [blame] | 454 | rc = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
| 456 | FreeXid(xid); |
| 457 | return rc; |
| 458 | } |
| 459 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 460 | int cifs_xquota_get(struct super_block *sb, int quota_type, qid_t qid, |
| 461 | struct fs_disk_quota *pdquota) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | { |
| 463 | int xid; |
| 464 | int rc = 0; |
| 465 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 466 | struct cifsTconInfo *pTcon; |
| 467 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 468 | if (cifs_sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | pTcon = cifs_sb->tcon; |
| 470 | else |
| 471 | return -EIO; |
| 472 | |
| 473 | xid = GetXid(); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 474 | if (pTcon) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 475 | cFYI(1, ("set type: 0x%x id: %d", quota_type, qid)); |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 476 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | rc = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
| 479 | FreeXid(xid); |
| 480 | return rc; |
| 481 | } |
| 482 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 483 | int cifs_xstate_set(struct super_block *sb, unsigned int flags, int operation) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 485 | int xid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | int rc = 0; |
| 487 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 488 | struct cifsTconInfo *pTcon; |
| 489 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 490 | if (cifs_sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | pTcon = cifs_sb->tcon; |
| 492 | else |
| 493 | return -EIO; |
| 494 | |
| 495 | xid = GetXid(); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 496 | if (pTcon) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 497 | cFYI(1, ("flags: 0x%x operation: 0x%x", flags, operation)); |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 498 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | rc = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | |
| 501 | FreeXid(xid); |
| 502 | return rc; |
| 503 | } |
| 504 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 505 | int cifs_xstate_get(struct super_block *sb, struct fs_quota_stat *qstats) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | { |
| 507 | int xid; |
| 508 | int rc = 0; |
| 509 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 510 | struct cifsTconInfo *pTcon; |
| 511 | |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 512 | if (cifs_sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | pTcon = cifs_sb->tcon; |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 514 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | return -EIO; |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | xid = GetXid(); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 518 | if (pTcon) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 519 | cFYI(1, ("pqstats %p", qstats)); |
Steve French | 61e7480 | 2008-12-03 00:57:54 +0000 | [diff] [blame] | 520 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | rc = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
| 523 | FreeXid(xid); |
| 524 | return rc; |
| 525 | } |
| 526 | |
Alexey Dobriyan | 0d54b21 | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 527 | static const struct quotactl_ops cifs_quotactl_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | .set_xquota = cifs_xquota_set, |
Roel Kluin | 6f7e8f3 | 2008-02-12 20:38:10 +0000 | [diff] [blame] | 529 | .get_xquota = cifs_xquota_get, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | .set_xstate = cifs_xstate_set, |
| 531 | .get_xstate = cifs_xstate_get, |
| 532 | }; |
| 533 | #endif |
| 534 | |
Al Viro | 42faad9 | 2008-04-24 07:21:56 -0400 | [diff] [blame] | 535 | static void cifs_umount_begin(struct super_block *sb) |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 536 | { |
Al Viro | 42faad9 | 2008-04-24 07:21:56 -0400 | [diff] [blame] | 537 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 538 | struct cifsTconInfo *tcon; |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 539 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 540 | if (cifs_sb == NULL) |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 541 | return; |
| 542 | |
| 543 | tcon = cifs_sb->tcon; |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 544 | if (tcon == NULL) |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 545 | return; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 546 | |
| 547 | read_lock(&cifs_tcp_ses_lock); |
Steve French | ad8034f | 2009-06-26 03:25:49 +0000 | [diff] [blame] | 548 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
| 549 | /* we have other mounts to same share or we have |
| 550 | already tried to force umount this and woken up |
| 551 | all waiting network requests, nothing to do */ |
| 552 | read_unlock(&cifs_tcp_ses_lock); |
| 553 | return; |
| 554 | } else if (tcon->tc_count == 1) |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 555 | tcon->tidStatus = CifsExiting; |
Jeff Layton | f1987b4 | 2008-11-15 11:12:47 -0500 | [diff] [blame] | 556 | read_unlock(&cifs_tcp_ses_lock); |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 557 | |
Steve French | 3a5ff61 | 2006-07-14 22:37:11 +0000 | [diff] [blame] | 558 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 559 | /* cancel_notify_requests(tcon); */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 560 | if (tcon->ses && tcon->ses->server) { |
| 561 | cFYI(1, ("wake up tasks now - umount begin not complete")); |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 562 | wake_up_all(&tcon->ses->server->request_q); |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 563 | wake_up_all(&tcon->ses->server->response_q); |
| 564 | msleep(1); /* yield */ |
| 565 | /* we have to kick the requests once more */ |
| 566 | wake_up_all(&tcon->ses->server->response_q); |
| 567 | msleep(1); |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 568 | } |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 569 | |
| 570 | return; |
| 571 | } |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 572 | |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 573 | #ifdef CONFIG_CIFS_STATS2 |
| 574 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) |
| 575 | { |
| 576 | /* BB FIXME */ |
| 577 | return 0; |
| 578 | } |
| 579 | #endif |
| 580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
| 582 | { |
| 583 | *flags |= MS_NODIRATIME; |
| 584 | return 0; |
| 585 | } |
| 586 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 587 | static const struct super_operations cifs_super_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | .put_super = cifs_put_super, |
| 589 | .statfs = cifs_statfs, |
| 590 | .alloc_inode = cifs_alloc_inode, |
| 591 | .destroy_inode = cifs_destroy_inode, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 592 | /* .drop_inode = generic_delete_inode, |
| 593 | .delete_inode = cifs_delete_inode, */ /* Do not need above two |
| 594 | functions unless later we add lazy close of inodes or unless the |
| 595 | kernel forgets to call us with the same number of releases (closes) |
| 596 | as opens */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | .show_options = cifs_show_options, |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 598 | .umount_begin = cifs_umount_begin, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | .remount_fs = cifs_remount, |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 600 | #ifdef CONFIG_CIFS_STATS2 |
Steve French | f46d3e1 | 2006-09-30 01:08:55 +0000 | [diff] [blame] | 601 | .show_stats = cifs_show_stats, |
Steve French | bf97d28 | 2006-09-28 21:34:06 +0000 | [diff] [blame] | 602 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | }; |
| 604 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 605 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | cifs_get_sb(struct file_system_type *fs_type, |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 607 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | { |
| 609 | int rc; |
| 610 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); |
| 611 | |
| 612 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); |
| 613 | |
| 614 | if (IS_ERR(sb)) |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 615 | return PTR_ERR(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
| 617 | sb->s_flags = flags; |
| 618 | |
Theodore Ts'o | 9b04c99 | 2006-03-24 03:15:10 -0800 | [diff] [blame] | 619 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | if (rc) { |
Al Viro | 6f5bbff | 2009-05-06 01:34:22 -0400 | [diff] [blame] | 621 | deactivate_locked_super(sb); |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 622 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | } |
| 624 | sb->s_flags |= MS_ACTIVE; |
Sukadev Bhattiprolu | a3ec947 | 2009-03-04 12:06:34 -0800 | [diff] [blame] | 625 | simple_set_mnt(mnt, sb); |
| 626 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | } |
| 628 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 629 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 630 | unsigned long nr_segs, loff_t pos) |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 631 | { |
Josef "Jeff" Sipek | e6a0029 | 2006-12-08 02:36:48 -0800 | [diff] [blame] | 632 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 633 | ssize_t written; |
| 634 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 635 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 636 | if (!CIFS_I(inode)->clientCanCacheAll) |
| 637 | filemap_fdatawrite(inode->i_mapping); |
| 638 | return written; |
| 639 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 641 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
| 642 | { |
| 643 | /* origin == SEEK_END => we must revalidate the cached file length */ |
Steve French | 0889a94 | 2006-09-23 22:11:07 +0000 | [diff] [blame] | 644 | if (origin == SEEK_END) { |
Steve French | 030e9d8 | 2007-02-01 04:27:59 +0000 | [diff] [blame] | 645 | int retval; |
| 646 | |
| 647 | /* some applications poll for the file length in this strange |
| 648 | way so we must seek to end on non-oplocked files by |
| 649 | setting the revalidate time to zero */ |
Christoph Hellwig | c33f8d3 | 2007-04-02 18:47:20 +0000 | [diff] [blame] | 650 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
Steve French | 030e9d8 | 2007-02-01 04:27:59 +0000 | [diff] [blame] | 651 | |
Jeff Layton | abab095 | 2010-02-12 07:44:18 -0500 | [diff] [blame] | 652 | retval = cifs_revalidate_file(file); |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 653 | if (retval < 0) |
| 654 | return (loff_t)retval; |
| 655 | } |
Andi Kleen | 9465efc | 2008-06-27 11:05:24 +0200 | [diff] [blame] | 656 | return generic_file_llseek_unlocked(file, offset, origin); |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 657 | } |
| 658 | |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 659 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 660 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
| 661 | { |
| 662 | /* note that this is called by vfs setlease with the BKL held |
| 663 | although I doubt that BKL is needed here in cifs */ |
| 664 | struct inode *inode = file->f_path.dentry->d_inode; |
| 665 | |
| 666 | if (!(S_ISREG(inode->i_mode))) |
| 667 | return -EINVAL; |
| 668 | |
| 669 | /* check if file is oplocked */ |
| 670 | if (((arg == F_RDLCK) && |
| 671 | (CIFS_I(inode)->clientCanCacheRead)) || |
| 672 | ((arg == F_WRLCK) && |
| 673 | (CIFS_I(inode)->clientCanCacheAll))) |
| 674 | return generic_setlease(file, arg, lease); |
| 675 | else if (CIFS_SB(inode->i_sb)->tcon->local_lease && |
| 676 | !CIFS_I(inode)->clientCanCacheRead) |
| 677 | /* If the server claims to support oplock on this |
| 678 | file, then we still need to check oplock even |
| 679 | if the local_lease mount option is set, but there |
| 680 | are servers which do not support oplock for which |
| 681 | this mount option may be useful if the user |
| 682 | knows that the file won't be changed on the server |
| 683 | by anyone else */ |
| 684 | return generic_setlease(file, arg, lease); |
| 685 | else |
| 686 | return -EAGAIN; |
| 687 | } |
| 688 | #endif |
| 689 | |
Igor Mammedov | e6ab158 | 2008-01-11 01:49:48 +0000 | [diff] [blame] | 690 | struct file_system_type cifs_fs_type = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | .owner = THIS_MODULE, |
| 692 | .name = "cifs", |
| 693 | .get_sb = cifs_get_sb, |
| 694 | .kill_sb = kill_anon_super, |
| 695 | /* .fs_flags */ |
| 696 | }; |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 697 | const struct inode_operations cifs_dir_inode_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | .create = cifs_create, |
| 699 | .lookup = cifs_lookup, |
| 700 | .getattr = cifs_getattr, |
| 701 | .unlink = cifs_unlink, |
| 702 | .link = cifs_hardlink, |
| 703 | .mkdir = cifs_mkdir, |
| 704 | .rmdir = cifs_rmdir, |
| 705 | .rename = cifs_rename, |
| 706 | .permission = cifs_permission, |
| 707 | /* revalidate:cifs_revalidate, */ |
| 708 | .setattr = cifs_setattr, |
| 709 | .symlink = cifs_symlink, |
| 710 | .mknod = cifs_mknod, |
| 711 | #ifdef CONFIG_CIFS_XATTR |
| 712 | .setxattr = cifs_setxattr, |
| 713 | .getxattr = cifs_getxattr, |
| 714 | .listxattr = cifs_listxattr, |
| 715 | .removexattr = cifs_removexattr, |
| 716 | #endif |
| 717 | }; |
| 718 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 719 | const struct inode_operations cifs_file_inode_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | /* revalidate:cifs_revalidate, */ |
| 721 | .setattr = cifs_setattr, |
| 722 | .getattr = cifs_getattr, /* do we need this anymore? */ |
| 723 | .rename = cifs_rename, |
| 724 | .permission = cifs_permission, |
| 725 | #ifdef CONFIG_CIFS_XATTR |
| 726 | .setxattr = cifs_setxattr, |
| 727 | .getxattr = cifs_getxattr, |
| 728 | .listxattr = cifs_listxattr, |
| 729 | .removexattr = cifs_removexattr, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 730 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | }; |
| 732 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 733 | const struct inode_operations cifs_symlink_inode_ops = { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 734 | .readlink = generic_readlink, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | .follow_link = cifs_follow_link, |
| 736 | .put_link = cifs_put_link, |
| 737 | .permission = cifs_permission, |
| 738 | /* BB add the following two eventually */ |
| 739 | /* revalidate: cifs_revalidate, |
| 740 | setattr: cifs_notify_change, *//* BB do we need notify change */ |
| 741 | #ifdef CONFIG_CIFS_XATTR |
| 742 | .setxattr = cifs_setxattr, |
| 743 | .getxattr = cifs_getxattr, |
| 744 | .listxattr = cifs_listxattr, |
| 745 | .removexattr = cifs_removexattr, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 746 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | }; |
| 748 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 749 | const struct file_operations cifs_file_ops = { |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 750 | .read = do_sync_read, |
| 751 | .write = do_sync_write, |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 752 | .aio_read = generic_file_aio_read, |
| 753 | .aio_write = cifs_file_aio_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | .open = cifs_open, |
| 755 | .release = cifs_close, |
| 756 | .lock = cifs_lock, |
| 757 | .fsync = cifs_fsync, |
| 758 | .flush = cifs_flush, |
| 759 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 760 | .splice_read = generic_file_splice_read, |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 761 | .llseek = cifs_llseek, |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 762 | #ifdef CONFIG_CIFS_POSIX |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 763 | .unlocked_ioctl = cifs_ioctl, |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 764 | #endif /* CONFIG_CIFS_POSIX */ |
| 765 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 767 | .setlease = cifs_setlease, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
| 769 | }; |
| 770 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 771 | const struct file_operations cifs_file_direct_ops = { |
Steve French | a994b8f | 2009-12-07 05:44:46 +0000 | [diff] [blame] | 772 | /* no aio, no readv - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | BB reevaluate whether they can be done with directio, no cache */ |
| 774 | .read = cifs_user_read, |
| 775 | .write = cifs_user_write, |
| 776 | .open = cifs_open, |
| 777 | .release = cifs_close, |
| 778 | .lock = cifs_lock, |
| 779 | .fsync = cifs_fsync, |
| 780 | .flush = cifs_flush, |
Steve French | a994b8f | 2009-12-07 05:44:46 +0000 | [diff] [blame] | 781 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 782 | .splice_read = generic_file_splice_read, |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 783 | #ifdef CONFIG_CIFS_POSIX |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 784 | .unlocked_ioctl = cifs_ioctl, |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 785 | #endif /* CONFIG_CIFS_POSIX */ |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 786 | .llseek = cifs_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 788 | .setlease = cifs_setlease, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
| 790 | }; |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 791 | const struct file_operations cifs_file_nobrl_ops = { |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 792 | .read = do_sync_read, |
| 793 | .write = do_sync_write, |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 794 | .aio_read = generic_file_aio_read, |
| 795 | .aio_write = cifs_file_aio_write, |
| 796 | .open = cifs_open, |
| 797 | .release = cifs_close, |
| 798 | .fsync = cifs_fsync, |
| 799 | .flush = cifs_flush, |
| 800 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 801 | .splice_read = generic_file_splice_read, |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 802 | .llseek = cifs_llseek, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 803 | #ifdef CONFIG_CIFS_POSIX |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 804 | .unlocked_ioctl = cifs_ioctl, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 805 | #endif /* CONFIG_CIFS_POSIX */ |
| 806 | |
| 807 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 808 | .setlease = cifs_setlease, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 809 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
| 810 | }; |
| 811 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 812 | const struct file_operations cifs_file_direct_nobrl_ops = { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 813 | /* no mmap, no aio, no readv - |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 814 | BB reevaluate whether they can be done with directio, no cache */ |
| 815 | .read = cifs_user_read, |
| 816 | .write = cifs_user_write, |
| 817 | .open = cifs_open, |
| 818 | .release = cifs_close, |
| 819 | .fsync = cifs_fsync, |
| 820 | .flush = cifs_flush, |
Pavel Shilovsky | 810627a0 | 2010-03-27 02:00:49 +0000 | [diff] [blame] | 821 | .mmap = cifs_file_mmap, |
Jens Axboe | 5ffc4ef | 2007-06-01 11:49:19 +0200 | [diff] [blame] | 822 | .splice_read = generic_file_splice_read, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 823 | #ifdef CONFIG_CIFS_POSIX |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 824 | .unlocked_ioctl = cifs_ioctl, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 825 | #endif /* CONFIG_CIFS_POSIX */ |
Steve French | c32a0b6 | 2006-01-12 14:41:28 -0800 | [diff] [blame] | 826 | .llseek = cifs_llseek, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 827 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
Steve French | 84210e9 | 2008-10-23 04:42:37 +0000 | [diff] [blame] | 828 | .setlease = cifs_setlease, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 829 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
| 830 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 832 | const struct file_operations cifs_dir_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | .readdir = cifs_readdir, |
| 834 | .release = cifs_closedir, |
| 835 | .read = generic_read_dir, |
Steve French | f9ddcca | 2008-05-15 05:51:55 +0000 | [diff] [blame] | 836 | .unlocked_ioctl = cifs_ioctl, |
Christoph Hellwig | 3222a3e | 2008-09-03 21:53:01 +0200 | [diff] [blame] | 837 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | }; |
| 839 | |
| 840 | static void |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 841 | cifs_init_once(void *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | { |
| 843 | struct cifsInodeInfo *cifsi = inode; |
| 844 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 845 | inode_init_once(&cifsi->vfs_inode); |
| 846 | INIT_LIST_HEAD(&cifsi->lockList); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | } |
| 848 | |
| 849 | static int |
| 850 | cifs_init_inodecache(void) |
| 851 | { |
| 852 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame] | 853 | sizeof(struct cifsInodeInfo), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 854 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 855 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 856 | cifs_init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | if (cifs_inode_cachep == NULL) |
| 858 | return -ENOMEM; |
| 859 | |
| 860 | return 0; |
| 861 | } |
| 862 | |
| 863 | static void |
| 864 | cifs_destroy_inodecache(void) |
| 865 | { |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 866 | kmem_cache_destroy(cifs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | } |
| 868 | |
| 869 | static int |
| 870 | cifs_init_request_bufs(void) |
| 871 | { |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 872 | if (CIFSMaxBufSize < 8192) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
| 874 | Unicode path name has to fit in any SMB/CIFS path based frames */ |
| 875 | CIFSMaxBufSize = 8192; |
| 876 | } else if (CIFSMaxBufSize > 1024*127) { |
| 877 | CIFSMaxBufSize = 1024 * 127; |
| 878 | } else { |
| 879 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ |
| 880 | } |
| 881 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ |
| 882 | cifs_req_cachep = kmem_cache_create("cifs_request", |
| 883 | CIFSMaxBufSize + |
| 884 | MAX_CIFS_HDR_SIZE, 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 885 | SLAB_HWCACHE_ALIGN, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | if (cifs_req_cachep == NULL) |
| 887 | return -ENOMEM; |
| 888 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 889 | if (cifs_min_rcv < 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | cifs_min_rcv = 1; |
| 891 | else if (cifs_min_rcv > 64) { |
| 892 | cifs_min_rcv = 64; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 893 | cERROR(1, ("cifs_min_rcv set to maximum (64)")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | } |
| 895 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 896 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
| 897 | cifs_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 899 | if (cifs_req_poolp == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | kmem_cache_destroy(cifs_req_cachep); |
| 901 | return -ENOMEM; |
| 902 | } |
Steve French | ec637e3 | 2005-12-12 20:53:18 -0800 | [diff] [blame] | 903 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | almost all handle based requests (but not write response, nor is it |
| 905 | sufficient for path based requests). A smaller size would have |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 906 | been more efficient (compacting multiple slab items on one 4k page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | for the case in which debug was on, but this larger size allows |
| 908 | more SMBs to use small buffer alloc and is still much more |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 909 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | alloc of large cifs buffers even when page debugging is on */ |
| 911 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 912 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 913 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | if (cifs_sm_req_cachep == NULL) { |
| 915 | mempool_destroy(cifs_req_poolp); |
| 916 | kmem_cache_destroy(cifs_req_cachep); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 917 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | } |
| 919 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 920 | if (cifs_min_small < 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | cifs_min_small = 2; |
| 922 | else if (cifs_min_small > 256) { |
| 923 | cifs_min_small = 256; |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 924 | cFYI(1, ("cifs_min_small set to maximum (256)")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | } |
| 926 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 927 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
| 928 | cifs_sm_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 930 | if (cifs_sm_req_poolp == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | mempool_destroy(cifs_req_poolp); |
| 932 | kmem_cache_destroy(cifs_req_cachep); |
| 933 | kmem_cache_destroy(cifs_sm_req_cachep); |
| 934 | return -ENOMEM; |
| 935 | } |
| 936 | |
| 937 | return 0; |
| 938 | } |
| 939 | |
| 940 | static void |
| 941 | cifs_destroy_request_bufs(void) |
| 942 | { |
| 943 | mempool_destroy(cifs_req_poolp); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 944 | kmem_cache_destroy(cifs_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | mempool_destroy(cifs_sm_req_poolp); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 946 | kmem_cache_destroy(cifs_sm_req_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | } |
| 948 | |
| 949 | static int |
| 950 | cifs_init_mids(void) |
| 951 | { |
| 952 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame] | 953 | sizeof(struct mid_q_entry), 0, |
| 954 | SLAB_HWCACHE_ALIGN, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | if (cifs_mid_cachep == NULL) |
| 956 | return -ENOMEM; |
| 957 | |
Matthew Dobson | 93d2341 | 2006-03-26 01:37:50 -0800 | [diff] [blame] | 958 | /* 3 is a reasonable minimum number of simultaneous operations */ |
| 959 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 960 | if (cifs_mid_poolp == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | kmem_cache_destroy(cifs_mid_cachep); |
| 962 | return -ENOMEM; |
| 963 | } |
| 964 | |
| 965 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame] | 966 | sizeof(struct oplock_q_entry), 0, |
| 967 | SLAB_HWCACHE_ALIGN, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | if (cifs_oplock_cachep == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | mempool_destroy(cifs_mid_poolp); |
Akinobu Mita | e6985c7 | 2007-06-04 16:14:59 +0000 | [diff] [blame] | 970 | kmem_cache_destroy(cifs_mid_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | return -ENOMEM; |
| 972 | } |
| 973 | |
| 974 | return 0; |
| 975 | } |
| 976 | |
| 977 | static void |
| 978 | cifs_destroy_mids(void) |
| 979 | { |
| 980 | mempool_destroy(cifs_mid_poolp); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 981 | kmem_cache_destroy(cifs_mid_cachep); |
| 982 | kmem_cache_destroy(cifs_oplock_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | } |
| 984 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | static int __init |
| 986 | init_cifs(void) |
| 987 | { |
| 988 | int rc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | cifs_proc_init(); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 990 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
Steve French | 4ca9c19 | 2005-10-10 19:52:13 -0700 | [diff] [blame] | 991 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 992 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
| 993 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 994 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | /* |
| 996 | * Initialize Global counters |
| 997 | */ |
| 998 | atomic_set(&sesInfoAllocCount, 0); |
| 999 | atomic_set(&tconInfoAllocCount, 0); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1000 | atomic_set(&tcpSesAllocCount, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | atomic_set(&tcpSesReconnectCount, 0); |
| 1002 | atomic_set(&tconInfoReconnectCount, 0); |
| 1003 | |
| 1004 | atomic_set(&bufAllocCount, 0); |
Steve French | 4498eed5 | 2005-12-03 13:58:57 -0800 | [diff] [blame] | 1005 | atomic_set(&smBufAllocCount, 0); |
| 1006 | #ifdef CONFIG_CIFS_STATS2 |
| 1007 | atomic_set(&totBufAllocCount, 0); |
| 1008 | atomic_set(&totSmBufAllocCount, 0); |
| 1009 | #endif /* CONFIG_CIFS_STATS2 */ |
| 1010 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | atomic_set(&midCount, 0); |
| 1012 | GlobalCurrentXid = 0; |
| 1013 | GlobalTotalActiveXid = 0; |
| 1014 | GlobalMaxActiveXid = 0; |
Steve French | 2cd646a | 2006-09-28 19:43:08 +0000 | [diff] [blame] | 1015 | memset(Local_System_Name, 0, 15); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | rwlock_init(&GlobalSMBSeslock); |
Jeff Layton | e7ddee9 | 2008-11-14 13:44:38 -0500 | [diff] [blame] | 1017 | rwlock_init(&cifs_tcp_ses_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | spin_lock_init(&GlobalMid_Lock); |
| 1019 | |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1020 | if (cifs_max_pending < 2) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | cifs_max_pending = 2; |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1022 | cFYI(1, ("cifs_max_pending set to min of 2")); |
Steve French | 4523cc3 | 2007-04-30 20:13:06 +0000 | [diff] [blame] | 1023 | } else if (cifs_max_pending > 256) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | cifs_max_pending = 256; |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1025 | cFYI(1, ("cifs_max_pending set to max of 256")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | } |
| 1027 | |
| 1028 | rc = cifs_init_inodecache(); |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1029 | if (rc) |
| 1030 | goto out_clean_proc; |
| 1031 | |
| 1032 | rc = cifs_init_mids(); |
| 1033 | if (rc) |
| 1034 | goto out_destroy_inodecache; |
| 1035 | |
| 1036 | rc = cifs_init_request_bufs(); |
| 1037 | if (rc) |
| 1038 | goto out_destroy_mids; |
| 1039 | |
| 1040 | rc = register_filesystem(&cifs_fs_type); |
| 1041 | if (rc) |
| 1042 | goto out_destroy_request_bufs; |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1043 | #ifdef CONFIG_CIFS_UPCALL |
| 1044 | rc = register_key_type(&cifs_spnego_key_type); |
| 1045 | if (rc) |
| 1046 | goto out_unregister_filesystem; |
| 1047 | #endif |
Steve French | 6103335 | 2008-01-09 16:21:36 +0000 | [diff] [blame] | 1048 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 1049 | rc = register_key_type(&key_type_dns_resolver); |
| 1050 | if (rc) |
| 1051 | goto out_unregister_key_type; |
| 1052 | #endif |
David Howells | 0109d7e | 2009-11-20 21:50:36 +0000 | [diff] [blame] | 1053 | rc = slow_work_register_user(THIS_MODULE); |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 1054 | if (rc) |
| 1055 | goto out_unregister_resolver_key; |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1056 | |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1057 | return 0; |
| 1058 | |
Jeff Layton | 3bc303c | 2009-09-21 06:47:50 -0400 | [diff] [blame] | 1059 | out_unregister_resolver_key: |
Steve French | 6103335 | 2008-01-09 16:21:36 +0000 | [diff] [blame] | 1060 | #ifdef CONFIG_CIFS_DFS_UPCALL |
| 1061 | unregister_key_type(&key_type_dns_resolver); |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1062 | out_unregister_key_type: |
Steve French | 6103335 | 2008-01-09 16:21:36 +0000 | [diff] [blame] | 1063 | #endif |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1064 | #ifdef CONFIG_CIFS_UPCALL |
| 1065 | unregister_key_type(&cifs_spnego_key_type); |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1066 | out_unregister_filesystem: |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1067 | #endif |
Steve French | 45af7a0 | 2006-04-21 22:52:25 +0000 | [diff] [blame] | 1068 | unregister_filesystem(&cifs_fs_type); |
| 1069 | out_destroy_request_bufs: |
| 1070 | cifs_destroy_request_bufs(); |
| 1071 | out_destroy_mids: |
| 1072 | cifs_destroy_mids(); |
| 1073 | out_destroy_inodecache: |
| 1074 | cifs_destroy_inodecache(); |
| 1075 | out_clean_proc: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | cifs_proc_clean(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | return rc; |
| 1078 | } |
| 1079 | |
| 1080 | static void __exit |
| 1081 | exit_cifs(void) |
| 1082 | { |
Steve French | 90c81e0 | 2008-02-12 20:32:36 +0000 | [diff] [blame] | 1083 | cFYI(DBG2, ("exit_cifs")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | cifs_proc_clean(); |
Steve French | 6103335 | 2008-01-09 16:21:36 +0000 | [diff] [blame] | 1085 | #ifdef CONFIG_CIFS_DFS_UPCALL |
Igor Mammedov | 78d31a3 | 2008-04-24 12:56:07 +0400 | [diff] [blame] | 1086 | cifs_dfs_release_automount_timer(); |
Steve French | 6103335 | 2008-01-09 16:21:36 +0000 | [diff] [blame] | 1087 | unregister_key_type(&key_type_dns_resolver); |
| 1088 | #endif |
Jeff Layton | 84a15b9 | 2007-11-03 05:02:24 +0000 | [diff] [blame] | 1089 | #ifdef CONFIG_CIFS_UPCALL |
| 1090 | unregister_key_type(&cifs_spnego_key_type); |
| 1091 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | unregister_filesystem(&cifs_fs_type); |
| 1093 | cifs_destroy_inodecache(); |
| 1094 | cifs_destroy_mids(); |
| 1095 | cifs_destroy_request_bufs(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | } |
| 1097 | |
| 1098 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); |
Steve French | 6dc0f87 | 2007-07-06 23:13:06 +0000 | [diff] [blame] | 1099 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | MODULE_DESCRIPTION |
Steve French | 63135e0 | 2007-07-17 17:34:02 +0000 | [diff] [blame] | 1101 | ("VFS to access servers complying with the SNIA CIFS Specification " |
| 1102 | "e.g. Samba and Windows"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | MODULE_VERSION(CIFS_VERSION); |
| 1104 | module_init(init_cifs) |
| 1105 | module_exit(exit_cifs) |