Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
| 19 | #include "xfs_fs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 20 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 22 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "xfs_trans.h" |
| 24 | #include "xfs_sb.h" |
| 25 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_dir2.h" |
| 27 | #include "xfs_alloc.h" |
| 28 | #include "xfs_dmapi.h" |
| 29 | #include "xfs_quota.h" |
| 30 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 32 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include "xfs_dir2_sf.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 35 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_dinode.h" |
| 37 | #include "xfs_inode.h" |
| 38 | #include "xfs_bmap.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 39 | #include "xfs_btree.h" |
| 40 | #include "xfs_ialloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include "xfs_rtalloc.h" |
| 42 | #include "xfs_error.h" |
| 43 | #include "xfs_itable.h" |
| 44 | #include "xfs_rw.h" |
| 45 | #include "xfs_acl.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include "xfs_attr.h" |
| 47 | #include "xfs_buf_item.h" |
| 48 | #include "xfs_utils.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 49 | #include "xfs_vnodeops.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 51 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <linux/xattr.h> |
| 53 | #include <linux/namei.h> |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 54 | #include <linux/security.h> |
David Chinner | 3ed6526 | 2007-11-23 16:29:25 +1100 | [diff] [blame] | 55 | #include <linux/falloc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Nathan Scott | 4aeb664 | 2005-11-02 11:43:58 +1100 | [diff] [blame] | 57 | /* |
Christoph Hellwig | 42fe2b1 | 2006-01-11 15:35:17 +1100 | [diff] [blame] | 58 | * Bring the atime in the XFS inode uptodate. |
| 59 | * Used before logging the inode to disk or when the Linux inode goes away. |
| 60 | */ |
| 61 | void |
| 62 | xfs_synchronize_atime( |
| 63 | xfs_inode_t *ip) |
| 64 | { |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 65 | struct inode *inode = ip->i_vnode; |
Christoph Hellwig | 42fe2b1 | 2006-01-11 15:35:17 +1100 | [diff] [blame] | 66 | |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 67 | if (inode) { |
| 68 | ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; |
| 69 | ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; |
Christoph Hellwig | 42fe2b1 | 2006-01-11 15:35:17 +1100 | [diff] [blame] | 70 | } |
| 71 | } |
| 72 | |
| 73 | /* |
David Chinner | 5d51eff | 2007-11-23 16:29:18 +1100 | [diff] [blame] | 74 | * If the linux inode exists, mark it dirty. |
| 75 | * Used when commiting a dirty inode into a transaction so that |
| 76 | * the inode will get written back by the linux code |
| 77 | */ |
| 78 | void |
| 79 | xfs_mark_inode_dirty_sync( |
| 80 | xfs_inode_t *ip) |
| 81 | { |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 82 | struct inode *inode = ip->i_vnode; |
David Chinner | 5d51eff | 2007-11-23 16:29:18 +1100 | [diff] [blame] | 83 | |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 84 | if (inode) |
| 85 | mark_inode_dirty_sync(inode); |
David Chinner | 5d51eff | 2007-11-23 16:29:18 +1100 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | /* |
Nathan Scott | 4aeb664 | 2005-11-02 11:43:58 +1100 | [diff] [blame] | 89 | * Change the requested timestamp in the given inode. |
| 90 | * We don't lock across timestamp updates, and we don't log them but |
| 91 | * we do record the fact that there is dirty information in core. |
| 92 | * |
| 93 | * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG |
| 94 | * with XFS_ICHGTIME_ACC to be sure that access time |
| 95 | * update will take. Calling first with XFS_ICHGTIME_ACC |
| 96 | * and then XFS_ICHGTIME_MOD may fail to modify the access |
| 97 | * timestamp if the filesystem is mounted noacctm. |
| 98 | */ |
| 99 | void |
| 100 | xfs_ichgtime( |
| 101 | xfs_inode_t *ip, |
| 102 | int flags) |
| 103 | { |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 104 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
Nathan Scott | 4aeb664 | 2005-11-02 11:43:58 +1100 | [diff] [blame] | 105 | timespec_t tv; |
| 106 | |
Nathan Scott | 4aeb664 | 2005-11-02 11:43:58 +1100 | [diff] [blame] | 107 | nanotime(&tv); |
| 108 | if (flags & XFS_ICHGTIME_MOD) { |
| 109 | inode->i_mtime = tv; |
| 110 | ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec; |
| 111 | ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec; |
| 112 | } |
| 113 | if (flags & XFS_ICHGTIME_ACC) { |
| 114 | inode->i_atime = tv; |
| 115 | ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec; |
| 116 | ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec; |
| 117 | } |
| 118 | if (flags & XFS_ICHGTIME_CHG) { |
| 119 | inode->i_ctime = tv; |
| 120 | ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec; |
| 121 | ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec; |
| 122 | } |
| 123 | |
| 124 | /* |
| 125 | * We update the i_update_core field _after_ changing |
| 126 | * the timestamps in order to coordinate properly with |
| 127 | * xfs_iflush() so that we don't lose timestamp updates. |
| 128 | * This keeps us from having to hold the inode lock |
| 129 | * while doing this. We use the SYNCHRONIZE macro to |
| 130 | * ensure that the compiler does not reorder the update |
| 131 | * of i_update_core above the timestamp updates above. |
| 132 | */ |
| 133 | SYNCHRONIZE(); |
| 134 | ip->i_update_core = 1; |
David Chinner | cf10e82 | 2007-12-07 14:09:11 +1100 | [diff] [blame] | 135 | if (!(inode->i_state & I_NEW)) |
Nathan Scott | 4aeb664 | 2005-11-02 11:43:58 +1100 | [diff] [blame] | 136 | mark_inode_dirty_sync(inode); |
| 137 | } |
| 138 | |
| 139 | /* |
| 140 | * Variant on the above which avoids querying the system clock |
| 141 | * in situations where we know the Linux inode timestamps have |
| 142 | * just been updated (and so we can update our inode cheaply). |
Nathan Scott | 4aeb664 | 2005-11-02 11:43:58 +1100 | [diff] [blame] | 143 | */ |
| 144 | void |
| 145 | xfs_ichgtime_fast( |
| 146 | xfs_inode_t *ip, |
| 147 | struct inode *inode, |
| 148 | int flags) |
| 149 | { |
| 150 | timespec_t *tvp; |
| 151 | |
| 152 | /* |
Christoph Hellwig | 42fe2b1 | 2006-01-11 15:35:17 +1100 | [diff] [blame] | 153 | * Atime updates for read() & friends are handled lazily now, and |
| 154 | * explicit updates must go through xfs_ichgtime() |
| 155 | */ |
| 156 | ASSERT((flags & XFS_ICHGTIME_ACC) == 0); |
| 157 | |
Nathan Scott | 4aeb664 | 2005-11-02 11:43:58 +1100 | [diff] [blame] | 158 | if (flags & XFS_ICHGTIME_MOD) { |
| 159 | tvp = &inode->i_mtime; |
| 160 | ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec; |
| 161 | ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec; |
| 162 | } |
Nathan Scott | 4aeb664 | 2005-11-02 11:43:58 +1100 | [diff] [blame] | 163 | if (flags & XFS_ICHGTIME_CHG) { |
| 164 | tvp = &inode->i_ctime; |
| 165 | ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec; |
| 166 | ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec; |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * We update the i_update_core field _after_ changing |
| 171 | * the timestamps in order to coordinate properly with |
| 172 | * xfs_iflush() so that we don't lose timestamp updates. |
| 173 | * This keeps us from having to hold the inode lock |
| 174 | * while doing this. We use the SYNCHRONIZE macro to |
| 175 | * ensure that the compiler does not reorder the update |
| 176 | * of i_update_core above the timestamp updates above. |
| 177 | */ |
| 178 | SYNCHRONIZE(); |
| 179 | ip->i_update_core = 1; |
David Chinner | cf10e82 | 2007-12-07 14:09:11 +1100 | [diff] [blame] | 180 | if (!(inode->i_state & I_NEW)) |
Nathan Scott | 4aeb664 | 2005-11-02 11:43:58 +1100 | [diff] [blame] | 181 | mark_inode_dirty_sync(inode); |
| 182 | } |
| 183 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | /* |
| 186 | * Pull the link count and size up from the xfs inode to the linux inode |
| 187 | */ |
| 188 | STATIC void |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 189 | xfs_validate_fields( |
Christoph Hellwig | 6572bc2 | 2007-09-19 15:27:39 +1000 | [diff] [blame] | 190 | struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | { |
Christoph Hellwig | 6572bc2 | 2007-09-19 15:27:39 +1000 | [diff] [blame] | 192 | struct xfs_inode *ip = XFS_I(inode); |
| 193 | loff_t size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Christoph Hellwig | 6572bc2 | 2007-09-19 15:27:39 +1000 | [diff] [blame] | 195 | /* we're under i_sem so i_size can't change under us */ |
| 196 | size = XFS_ISIZE(ip); |
| 197 | if (i_size_read(inode) != size) |
| 198 | i_size_write(inode, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | /* |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 202 | * Hook in SELinux. This is not quite correct yet, what we really need |
| 203 | * here (as we do for default ACLs) is a mechanism by which creation of |
| 204 | * these attrs can be journalled at inode creation time (along with the |
| 205 | * inode, of course, such that log replay can't cause these to be lost). |
| 206 | */ |
| 207 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 208 | xfs_init_security( |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 209 | struct inode *inode, |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 210 | struct inode *dir) |
| 211 | { |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 212 | struct xfs_inode *ip = XFS_I(inode); |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 213 | size_t length; |
| 214 | void *value; |
| 215 | char *name; |
| 216 | int error; |
| 217 | |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 218 | error = security_inode_init_security(inode, dir, &name, |
| 219 | &value, &length); |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 220 | if (error) { |
| 221 | if (error == -EOPNOTSUPP) |
| 222 | return 0; |
| 223 | return -error; |
| 224 | } |
| 225 | |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 226 | error = xfs_attr_set(ip, name, value, length, ATTR_SECURE); |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 227 | if (!error) |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 228 | xfs_iflags_set(ip, XFS_IMODIFIED); |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 229 | |
| 230 | kfree(name); |
| 231 | kfree(value); |
| 232 | return error; |
| 233 | } |
| 234 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 235 | static void |
| 236 | xfs_dentry_to_name( |
| 237 | struct xfs_name *namep, |
| 238 | struct dentry *dentry) |
| 239 | { |
| 240 | namep->name = dentry->d_name.name; |
| 241 | namep->len = dentry->d_name.len; |
| 242 | } |
| 243 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 244 | STATIC void |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 245 | xfs_cleanup_inode( |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 246 | struct inode *dir, |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 247 | struct inode *inode, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame^] | 248 | struct dentry *dentry) |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 249 | { |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 250 | struct xfs_name teardown; |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 251 | |
| 252 | /* Oh, the horror. |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 253 | * If we can't add the ACL or we fail in |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 254 | * xfs_init_security we must back out. |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 255 | * ENOSPC can hit here, among other things. |
| 256 | */ |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 257 | xfs_dentry_to_name(&teardown, dentry); |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 258 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame^] | 259 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 260 | iput(inode); |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 261 | } |
| 262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 264 | xfs_vn_mknod( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | struct inode *dir, |
| 266 | struct dentry *dentry, |
| 267 | int mode, |
| 268 | dev_t rdev) |
| 269 | { |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 270 | struct inode *inode; |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 271 | struct xfs_inode *ip = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | xfs_acl_t *default_acl = NULL; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 273 | struct xfs_name name; |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 274 | int (*test_default_acl)(struct inode *) = _ACL_DEFAULT_EXISTS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | int error; |
| 276 | |
| 277 | /* |
| 278 | * Irix uses Missed'em'V split, but doesn't want to see |
| 279 | * the upper 5 bits of (14bit) major. |
| 280 | */ |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 281 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | return -EINVAL; |
| 283 | |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 284 | if (test_default_acl && test_default_acl(dir)) { |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 285 | if (!_ACL_ALLOC(default_acl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | return -ENOMEM; |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 287 | } |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 288 | if (!_ACL_GET_DEFAULT(dir, default_acl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | _ACL_FREE(default_acl); |
| 290 | default_acl = NULL; |
| 291 | } |
| 292 | } |
| 293 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 294 | xfs_dentry_to_name(&name, dentry); |
| 295 | |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 296 | if (IS_POSIXACL(dir) && !default_acl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | mode &= ~current->fs->umask; |
| 298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | switch (mode & S_IFMT) { |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 300 | case S_IFCHR: |
| 301 | case S_IFBLK: |
| 302 | case S_IFIFO: |
| 303 | case S_IFSOCK: |
Christoph Hellwig | 3e5daf0 | 2007-10-11 18:09:12 +1000 | [diff] [blame] | 304 | rdev = sysv_encode_dev(rdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | case S_IFREG: |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 306 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | break; |
| 308 | case S_IFDIR: |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 309 | error = xfs_mkdir(XFS_I(dir), &name, mode, &ip, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | break; |
| 311 | default: |
| 312 | error = EINVAL; |
| 313 | break; |
| 314 | } |
| 315 | |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 316 | if (unlikely(error)) |
| 317 | goto out_free_acl; |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 318 | |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 319 | inode = ip->i_vnode; |
| 320 | |
| 321 | error = xfs_init_security(inode, dir); |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 322 | if (unlikely(error)) |
| 323 | goto out_cleanup_inode; |
| 324 | |
| 325 | if (default_acl) { |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 326 | error = _ACL_INHERIT(inode, mode, default_acl); |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 327 | if (unlikely(error)) |
| 328 | goto out_cleanup_inode; |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 329 | xfs_iflags_set(ip, XFS_IMODIFIED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | _ACL_FREE(default_acl); |
| 331 | } |
| 332 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 334 | if (S_ISDIR(mode)) |
| 335 | xfs_validate_fields(inode); |
| 336 | d_instantiate(dentry, inode); |
| 337 | xfs_validate_fields(dir); |
| 338 | return -error; |
| 339 | |
| 340 | out_cleanup_inode: |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame^] | 341 | xfs_cleanup_inode(dir, inode, dentry); |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 342 | out_free_acl: |
| 343 | if (default_acl) |
| 344 | _ACL_FREE(default_acl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | return -error; |
| 346 | } |
| 347 | |
| 348 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 349 | xfs_vn_create( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | struct inode *dir, |
| 351 | struct dentry *dentry, |
| 352 | int mode, |
| 353 | struct nameidata *nd) |
| 354 | { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 355 | return xfs_vn_mknod(dir, dentry, mode, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 359 | xfs_vn_mkdir( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | struct inode *dir, |
| 361 | struct dentry *dentry, |
| 362 | int mode) |
| 363 | { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 364 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | STATIC struct dentry * |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 368 | xfs_vn_lookup( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | struct inode *dir, |
| 370 | struct dentry *dentry, |
| 371 | struct nameidata *nd) |
| 372 | { |
Christoph Hellwig | ef1f5e7 | 2008-03-06 13:46:25 +1100 | [diff] [blame] | 373 | struct xfs_inode *cip; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 374 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | int error; |
| 376 | |
| 377 | if (dentry->d_name.len >= MAXNAMELEN) |
| 378 | return ERR_PTR(-ENAMETOOLONG); |
| 379 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 380 | xfs_dentry_to_name(&name, dentry); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 381 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 382 | if (unlikely(error)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | if (unlikely(error != ENOENT)) |
| 384 | return ERR_PTR(-error); |
| 385 | d_add(dentry, NULL); |
| 386 | return NULL; |
| 387 | } |
| 388 | |
Christoph Hellwig | ef1f5e7 | 2008-03-06 13:46:25 +1100 | [diff] [blame] | 389 | return d_splice_alias(cip->i_vnode, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 392 | STATIC struct dentry * |
| 393 | xfs_vn_ci_lookup( |
| 394 | struct inode *dir, |
| 395 | struct dentry *dentry, |
| 396 | struct nameidata *nd) |
| 397 | { |
| 398 | struct xfs_inode *ip; |
| 399 | struct xfs_name xname; |
| 400 | struct xfs_name ci_name; |
| 401 | struct qstr dname; |
| 402 | int error; |
| 403 | |
| 404 | if (dentry->d_name.len >= MAXNAMELEN) |
| 405 | return ERR_PTR(-ENAMETOOLONG); |
| 406 | |
| 407 | xfs_dentry_to_name(&xname, dentry); |
| 408 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
| 409 | if (unlikely(error)) { |
| 410 | if (unlikely(error != ENOENT)) |
| 411 | return ERR_PTR(-error); |
Barry Naujok | 866d5dc | 2008-05-22 17:21:40 +1000 | [diff] [blame] | 412 | /* |
| 413 | * call d_add(dentry, NULL) here when d_drop_negative_children |
| 414 | * is called in xfs_vn_mknod (ie. allow negative dentries |
| 415 | * with CI filesystems). |
| 416 | */ |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 417 | return NULL; |
| 418 | } |
| 419 | |
| 420 | /* if exact match, just splice and exit */ |
| 421 | if (!ci_name.name) |
| 422 | return d_splice_alias(ip->i_vnode, dentry); |
| 423 | |
| 424 | /* else case-insensitive match... */ |
| 425 | dname.name = ci_name.name; |
| 426 | dname.len = ci_name.len; |
| 427 | dentry = d_add_ci(ip->i_vnode, dentry, &dname); |
| 428 | kmem_free(ci_name.name); |
| 429 | return dentry; |
| 430 | } |
| 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 433 | xfs_vn_link( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | struct dentry *old_dentry, |
| 435 | struct inode *dir, |
| 436 | struct dentry *dentry) |
| 437 | { |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 438 | struct inode *inode; /* inode of guy being linked to */ |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 439 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | int error; |
| 441 | |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 442 | inode = old_dentry->d_inode; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 443 | xfs_dentry_to_name(&name, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 445 | igrab(inode); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 446 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
Nathan Scott | 97dfd70 | 2006-06-27 16:13:46 +1000 | [diff] [blame] | 447 | if (unlikely(error)) { |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 448 | iput(inode); |
| 449 | return -error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 451 | |
| 452 | xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED); |
| 453 | xfs_validate_fields(inode); |
| 454 | d_instantiate(dentry, inode); |
| 455 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 459 | xfs_vn_unlink( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | struct inode *dir, |
| 461 | struct dentry *dentry) |
| 462 | { |
| 463 | struct inode *inode; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 464 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | int error; |
| 466 | |
| 467 | inode = dentry->d_inode; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 468 | xfs_dentry_to_name(&name, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 470 | error = xfs_remove(XFS_I(dir), &name, XFS_I(inode)); |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 471 | if (likely(!error)) { |
Christoph Hellwig | 6572bc2 | 2007-09-19 15:27:39 +1000 | [diff] [blame] | 472 | xfs_validate_fields(dir); /* size needs update */ |
| 473 | xfs_validate_fields(inode); |
Barry Naujok | d532506 | 2008-06-16 12:07:41 +1000 | [diff] [blame] | 474 | /* |
| 475 | * With unlink, the VFS makes the dentry "negative": no inode, |
| 476 | * but still hashed. This is incompatible with case-insensitive |
| 477 | * mode, so invalidate (unhash) the dentry in CI-mode. |
| 478 | */ |
| 479 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) |
| 480 | d_invalidate(dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | return -error; |
| 483 | } |
| 484 | |
| 485 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 486 | xfs_vn_symlink( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | struct inode *dir, |
| 488 | struct dentry *dentry, |
| 489 | const char *symname) |
| 490 | { |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 491 | struct inode *inode; |
| 492 | struct xfs_inode *cip = NULL; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 493 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | int error; |
Christoph Hellwig | 3e5daf0 | 2007-10-11 18:09:12 +1000 | [diff] [blame] | 495 | mode_t mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
Christoph Hellwig | 3e5daf0 | 2007-10-11 18:09:12 +1000 | [diff] [blame] | 497 | mode = S_IFLNK | |
Christoph Hellwig | 0432dab | 2005-09-02 16:46:51 +1000 | [diff] [blame] | 498 | (irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 499 | xfs_dentry_to_name(&name, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 501 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip, NULL); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 502 | if (unlikely(error)) |
| 503 | goto out; |
| 504 | |
| 505 | inode = cip->i_vnode; |
| 506 | |
| 507 | error = xfs_init_security(inode, dir); |
| 508 | if (unlikely(error)) |
| 509 | goto out_cleanup_inode; |
| 510 | |
| 511 | d_instantiate(dentry, inode); |
| 512 | xfs_validate_fields(dir); |
| 513 | xfs_validate_fields(inode); |
| 514 | return 0; |
| 515 | |
| 516 | out_cleanup_inode: |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame^] | 517 | xfs_cleanup_inode(dir, inode, dentry); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 518 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | return -error; |
| 520 | } |
| 521 | |
| 522 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 523 | xfs_vn_rename( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | struct inode *odir, |
| 525 | struct dentry *odentry, |
| 526 | struct inode *ndir, |
| 527 | struct dentry *ndentry) |
| 528 | { |
| 529 | struct inode *new_inode = ndentry->d_inode; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 530 | struct xfs_name oname; |
| 531 | struct xfs_name nname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | int error; |
| 533 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 534 | xfs_dentry_to_name(&oname, odentry); |
| 535 | xfs_dentry_to_name(&nname, ndentry); |
| 536 | |
| 537 | error = xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), |
Christoph Hellwig | cfa853e | 2008-04-22 17:34:06 +1000 | [diff] [blame] | 538 | XFS_I(ndir), &nname, new_inode ? |
| 539 | XFS_I(new_inode) : NULL); |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 540 | if (likely(!error)) { |
| 541 | if (new_inode) |
Christoph Hellwig | 6572bc2 | 2007-09-19 15:27:39 +1000 | [diff] [blame] | 542 | xfs_validate_fields(new_inode); |
| 543 | xfs_validate_fields(odir); |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 544 | if (ndir != odir) |
Christoph Hellwig | 6572bc2 | 2007-09-19 15:27:39 +1000 | [diff] [blame] | 545 | xfs_validate_fields(ndir); |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 546 | } |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 547 | return -error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | } |
| 549 | |
| 550 | /* |
| 551 | * careful here - this function can get called recursively, so |
| 552 | * we need to be very careful about how much stack we use. |
| 553 | * uio is kmalloced for this reason... |
| 554 | */ |
Al Viro | 008b150 | 2005-08-20 00:17:39 +0100 | [diff] [blame] | 555 | STATIC void * |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 556 | xfs_vn_follow_link( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | struct dentry *dentry, |
| 558 | struct nameidata *nd) |
| 559 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | char *link; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 561 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 563 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 564 | if (!link) |
| 565 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 567 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 568 | if (unlikely(error)) |
| 569 | goto out_kfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
| 571 | nd_set_link(nd, link); |
Al Viro | 008b150 | 2005-08-20 00:17:39 +0100 | [diff] [blame] | 572 | return NULL; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 573 | |
| 574 | out_kfree: |
| 575 | kfree(link); |
| 576 | out_err: |
| 577 | nd_set_link(nd, ERR_PTR(error)); |
| 578 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | } |
| 580 | |
Nathan Scott | cde410a | 2005-09-05 11:47:01 +1000 | [diff] [blame] | 581 | STATIC void |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 582 | xfs_vn_put_link( |
Nathan Scott | cde410a | 2005-09-05 11:47:01 +1000 | [diff] [blame] | 583 | struct dentry *dentry, |
| 584 | struct nameidata *nd, |
| 585 | void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | { |
Nathan Scott | cde410a | 2005-09-05 11:47:01 +1000 | [diff] [blame] | 587 | char *s = nd_get_link(nd); |
| 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | if (!IS_ERR(s)) |
| 590 | kfree(s); |
| 591 | } |
| 592 | |
| 593 | #ifdef CONFIG_XFS_POSIX_ACL |
| 594 | STATIC int |
Christoph Hellwig | 4576758 | 2008-02-05 12:13:24 +1100 | [diff] [blame] | 595 | xfs_check_acl( |
| 596 | struct inode *inode, |
| 597 | int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | { |
Christoph Hellwig | 4576758 | 2008-02-05 12:13:24 +1100 | [diff] [blame] | 599 | struct xfs_inode *ip = XFS_I(inode); |
| 600 | int error; |
| 601 | |
| 602 | xfs_itrace_entry(ip); |
| 603 | |
| 604 | if (XFS_IFORK_Q(ip)) { |
| 605 | error = xfs_acl_iaccess(ip, mask, NULL); |
| 606 | if (error != -1) |
| 607 | return -error; |
| 608 | } |
| 609 | |
| 610 | return -EAGAIN; |
| 611 | } |
| 612 | |
| 613 | STATIC int |
| 614 | xfs_vn_permission( |
| 615 | struct inode *inode, |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 616 | int mask) |
Christoph Hellwig | 4576758 | 2008-02-05 12:13:24 +1100 | [diff] [blame] | 617 | { |
| 618 | return generic_permission(inode, mask, xfs_check_acl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | } |
| 620 | #else |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 621 | #define xfs_vn_permission NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | #endif |
| 623 | |
| 624 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 625 | xfs_vn_getattr( |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 626 | struct vfsmount *mnt, |
| 627 | struct dentry *dentry, |
| 628 | struct kstat *stat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | { |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 630 | struct inode *inode = dentry->d_inode; |
| 631 | struct xfs_inode *ip = XFS_I(inode); |
| 632 | struct xfs_mount *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 634 | xfs_itrace_entry(ip); |
| 635 | |
| 636 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 637 | return XFS_ERROR(EIO); |
| 638 | |
| 639 | stat->size = XFS_ISIZE(ip); |
| 640 | stat->dev = inode->i_sb->s_dev; |
| 641 | stat->mode = ip->i_d.di_mode; |
| 642 | stat->nlink = ip->i_d.di_nlink; |
| 643 | stat->uid = ip->i_d.di_uid; |
| 644 | stat->gid = ip->i_d.di_gid; |
| 645 | stat->ino = ip->i_ino; |
| 646 | #if XFS_BIG_INUMS |
| 647 | stat->ino += mp->m_inoadd; |
| 648 | #endif |
| 649 | stat->atime = inode->i_atime; |
| 650 | stat->mtime.tv_sec = ip->i_d.di_mtime.t_sec; |
| 651 | stat->mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; |
| 652 | stat->ctime.tv_sec = ip->i_d.di_ctime.t_sec; |
| 653 | stat->ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; |
| 654 | stat->blocks = |
| 655 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); |
| 656 | |
| 657 | |
| 658 | switch (inode->i_mode & S_IFMT) { |
| 659 | case S_IFBLK: |
| 660 | case S_IFCHR: |
| 661 | stat->blksize = BLKDEV_IOSIZE; |
| 662 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, |
| 663 | sysv_minor(ip->i_df.if_u2.if_rdev)); |
| 664 | break; |
| 665 | default: |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 666 | if (XFS_IS_REALTIME_INODE(ip)) { |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 667 | /* |
| 668 | * If the file blocks are being allocated from a |
| 669 | * realtime volume, then return the inode's realtime |
| 670 | * extent size or the realtime volume's extent size. |
| 671 | */ |
| 672 | stat->blksize = |
| 673 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; |
| 674 | } else |
| 675 | stat->blksize = xfs_preferred_iosize(mp); |
| 676 | stat->rdev = 0; |
| 677 | break; |
Nathan Scott | 69e23b9 | 2006-09-28 11:01:22 +1000 | [diff] [blame] | 678 | } |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 679 | |
| 680 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | } |
| 682 | |
| 683 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 684 | xfs_vn_setattr( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | struct dentry *dentry, |
| 686 | struct iattr *attr) |
| 687 | { |
| 688 | struct inode *inode = dentry->d_inode; |
| 689 | unsigned int ia_valid = attr->ia_valid; |
Nathan Scott | 8285fb5 | 2006-06-09 17:07:12 +1000 | [diff] [blame] | 690 | bhv_vattr_t vattr = { 0 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | int flags = 0; |
| 692 | int error; |
| 693 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | if (ia_valid & ATTR_UID) { |
| 695 | vattr.va_mask |= XFS_AT_UID; |
| 696 | vattr.va_uid = attr->ia_uid; |
| 697 | } |
| 698 | if (ia_valid & ATTR_GID) { |
| 699 | vattr.va_mask |= XFS_AT_GID; |
| 700 | vattr.va_gid = attr->ia_gid; |
| 701 | } |
| 702 | if (ia_valid & ATTR_SIZE) { |
| 703 | vattr.va_mask |= XFS_AT_SIZE; |
| 704 | vattr.va_size = attr->ia_size; |
| 705 | } |
| 706 | if (ia_valid & ATTR_ATIME) { |
| 707 | vattr.va_mask |= XFS_AT_ATIME; |
| 708 | vattr.va_atime = attr->ia_atime; |
Nathan Scott | 8c0b511 | 2006-04-11 15:12:45 +1000 | [diff] [blame] | 709 | inode->i_atime = attr->ia_atime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | } |
| 711 | if (ia_valid & ATTR_MTIME) { |
| 712 | vattr.va_mask |= XFS_AT_MTIME; |
| 713 | vattr.va_mtime = attr->ia_mtime; |
| 714 | } |
| 715 | if (ia_valid & ATTR_CTIME) { |
| 716 | vattr.va_mask |= XFS_AT_CTIME; |
| 717 | vattr.va_ctime = attr->ia_ctime; |
| 718 | } |
| 719 | if (ia_valid & ATTR_MODE) { |
| 720 | vattr.va_mask |= XFS_AT_MODE; |
| 721 | vattr.va_mode = attr->ia_mode; |
| 722 | if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) |
| 723 | inode->i_mode &= ~S_ISGID; |
| 724 | } |
| 725 | |
| 726 | if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) |
| 727 | flags |= ATTR_UTIME; |
| 728 | #ifdef ATTR_NO_BLOCK |
| 729 | if ((ia_valid & ATTR_NO_BLOCK)) |
| 730 | flags |= ATTR_NONBLOCK; |
| 731 | #endif |
| 732 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 733 | error = xfs_setattr(XFS_I(inode), &vattr, flags, NULL); |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 734 | if (likely(!error)) |
Christoph Hellwig | 21a6254 | 2007-09-19 15:27:49 +1000 | [diff] [blame] | 735 | vn_revalidate(vn_from_inode(inode)); |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 736 | return -error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | } |
| 738 | |
David Chinner | d87dd63 | 2008-04-10 12:21:46 +1000 | [diff] [blame] | 739 | /* |
| 740 | * block_truncate_page can return an error, but we can't propagate it |
| 741 | * at all here. Leave a complaint + stack trace in the syslog because |
| 742 | * this could be bad. If it is bad, we need to propagate the error further. |
| 743 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | STATIC void |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 745 | xfs_vn_truncate( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | struct inode *inode) |
| 747 | { |
David Chinner | d87dd63 | 2008-04-10 12:21:46 +1000 | [diff] [blame] | 748 | int error; |
| 749 | error = block_truncate_page(inode->i_mapping, inode->i_size, |
| 750 | xfs_get_blocks); |
| 751 | WARN_ON(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | } |
| 753 | |
David Chinner | 3ed6526 | 2007-11-23 16:29:25 +1100 | [diff] [blame] | 754 | STATIC long |
| 755 | xfs_vn_fallocate( |
| 756 | struct inode *inode, |
| 757 | int mode, |
| 758 | loff_t offset, |
| 759 | loff_t len) |
| 760 | { |
| 761 | long error; |
| 762 | loff_t new_size = 0; |
| 763 | xfs_flock64_t bf; |
| 764 | xfs_inode_t *ip = XFS_I(inode); |
| 765 | |
| 766 | /* preallocation on directories not yet supported */ |
| 767 | error = -ENODEV; |
| 768 | if (S_ISDIR(inode->i_mode)) |
| 769 | goto out_error; |
| 770 | |
| 771 | bf.l_whence = 0; |
| 772 | bf.l_start = offset; |
| 773 | bf.l_len = len; |
| 774 | |
| 775 | xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| 776 | error = xfs_change_file_space(ip, XFS_IOC_RESVSP, &bf, |
| 777 | 0, NULL, ATTR_NOLOCK); |
| 778 | if (!error && !(mode & FALLOC_FL_KEEP_SIZE) && |
| 779 | offset + len > i_size_read(inode)) |
| 780 | new_size = offset + len; |
| 781 | |
| 782 | /* Change file size if needed */ |
| 783 | if (new_size) { |
| 784 | bhv_vattr_t va; |
| 785 | |
| 786 | va.va_mask = XFS_AT_SIZE; |
| 787 | va.va_size = new_size; |
| 788 | error = xfs_setattr(ip, &va, ATTR_NOLOCK, NULL); |
| 789 | } |
| 790 | |
| 791 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 792 | out_error: |
| 793 | return error; |
| 794 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 796 | const struct inode_operations xfs_inode_operations = { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 797 | .permission = xfs_vn_permission, |
| 798 | .truncate = xfs_vn_truncate, |
| 799 | .getattr = xfs_vn_getattr, |
| 800 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 801 | .setxattr = generic_setxattr, |
| 802 | .getxattr = generic_getxattr, |
| 803 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 804 | .listxattr = xfs_vn_listxattr, |
David Chinner | 3ed6526 | 2007-11-23 16:29:25 +1100 | [diff] [blame] | 805 | .fallocate = xfs_vn_fallocate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | }; |
| 807 | |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 808 | const struct inode_operations xfs_dir_inode_operations = { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 809 | .create = xfs_vn_create, |
| 810 | .lookup = xfs_vn_lookup, |
| 811 | .link = xfs_vn_link, |
| 812 | .unlink = xfs_vn_unlink, |
| 813 | .symlink = xfs_vn_symlink, |
| 814 | .mkdir = xfs_vn_mkdir, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame^] | 815 | /* |
| 816 | * Yes, XFS uses the same method for rmdir and unlink. |
| 817 | * |
| 818 | * There are some subtile differences deeper in the code, |
| 819 | * but we use S_ISDIR to check for those. |
| 820 | */ |
| 821 | .rmdir = xfs_vn_unlink, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 822 | .mknod = xfs_vn_mknod, |
| 823 | .rename = xfs_vn_rename, |
| 824 | .permission = xfs_vn_permission, |
| 825 | .getattr = xfs_vn_getattr, |
| 826 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 827 | .setxattr = generic_setxattr, |
| 828 | .getxattr = generic_getxattr, |
| 829 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 830 | .listxattr = xfs_vn_listxattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | }; |
| 832 | |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 833 | const struct inode_operations xfs_dir_ci_inode_operations = { |
| 834 | .create = xfs_vn_create, |
| 835 | .lookup = xfs_vn_ci_lookup, |
| 836 | .link = xfs_vn_link, |
| 837 | .unlink = xfs_vn_unlink, |
| 838 | .symlink = xfs_vn_symlink, |
| 839 | .mkdir = xfs_vn_mkdir, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame^] | 840 | /* |
| 841 | * Yes, XFS uses the same method for rmdir and unlink. |
| 842 | * |
| 843 | * There are some subtile differences deeper in the code, |
| 844 | * but we use S_ISDIR to check for those. |
| 845 | */ |
| 846 | .rmdir = xfs_vn_unlink, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 847 | .mknod = xfs_vn_mknod, |
| 848 | .rename = xfs_vn_rename, |
| 849 | .permission = xfs_vn_permission, |
| 850 | .getattr = xfs_vn_getattr, |
| 851 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 852 | .setxattr = generic_setxattr, |
| 853 | .getxattr = generic_getxattr, |
| 854 | .removexattr = generic_removexattr, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 855 | .listxattr = xfs_vn_listxattr, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 856 | }; |
| 857 | |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 858 | const struct inode_operations xfs_symlink_inode_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | .readlink = generic_readlink, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 860 | .follow_link = xfs_vn_follow_link, |
| 861 | .put_link = xfs_vn_put_link, |
| 862 | .permission = xfs_vn_permission, |
| 863 | .getattr = xfs_vn_getattr, |
| 864 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 865 | .setxattr = generic_setxattr, |
| 866 | .getxattr = generic_getxattr, |
| 867 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 868 | .listxattr = xfs_vn_listxattr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | }; |