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 | */ |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 18 | |
| 19 | #include <linux/capability.h> |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 22 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 24 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 26 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_trans.h" |
| 28 | #include "xfs_sb.h" |
| 29 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_dir2.h" |
| 31 | #include "xfs_dmapi.h" |
| 32 | #include "xfs_mount.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 33 | #include "xfs_da_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 35 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_dir2_sf.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 38 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_dinode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 41 | #include "xfs_alloc.h" |
| 42 | #include "xfs_btree.h" |
| 43 | #include "xfs_inode_item.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include "xfs_attr.h" |
| 46 | #include "xfs_attr_leaf.h" |
| 47 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include "xfs_quota.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include "xfs_trans_space.h" |
| 50 | #include "xfs_acl.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 51 | #include "xfs_rw.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 52 | #include "xfs_vnodeops.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | /* |
| 55 | * xfs_attr.c |
| 56 | * |
| 57 | * Provide the external interfaces to manage attribute lists. |
| 58 | */ |
| 59 | |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 60 | #define ATTR_SYSCOUNT 2 |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 61 | static struct attrnames posix_acl_access; |
| 62 | static struct attrnames posix_acl_default; |
| 63 | static struct attrnames *attr_system_names[ATTR_SYSCOUNT]; |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | /*======================================================================== |
| 66 | * Function prototypes for the kernel. |
| 67 | *========================================================================*/ |
| 68 | |
| 69 | /* |
| 70 | * Internal routines when attribute list fits inside the inode. |
| 71 | */ |
| 72 | STATIC int xfs_attr_shortform_addname(xfs_da_args_t *args); |
| 73 | |
| 74 | /* |
| 75 | * Internal routines when attribute list is one block. |
| 76 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 77 | STATIC int xfs_attr_leaf_get(xfs_da_args_t *args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | STATIC int xfs_attr_leaf_addname(xfs_da_args_t *args); |
| 79 | STATIC int xfs_attr_leaf_removename(xfs_da_args_t *args); |
| 80 | STATIC int xfs_attr_leaf_list(xfs_attr_list_context_t *context); |
| 81 | |
| 82 | /* |
| 83 | * Internal routines when attribute list is more than one block. |
| 84 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 85 | STATIC int xfs_attr_node_get(xfs_da_args_t *args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | STATIC int xfs_attr_node_addname(xfs_da_args_t *args); |
| 87 | STATIC int xfs_attr_node_removename(xfs_da_args_t *args); |
| 88 | STATIC int xfs_attr_node_list(xfs_attr_list_context_t *context); |
| 89 | STATIC int xfs_attr_fillstate(xfs_da_state_t *state); |
| 90 | STATIC int xfs_attr_refillstate(xfs_da_state_t *state); |
| 91 | |
| 92 | /* |
| 93 | * Routines to manipulate out-of-line attribute values. |
| 94 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | STATIC int xfs_attr_rmtval_set(xfs_da_args_t *args); |
| 96 | STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args); |
| 97 | |
| 98 | #define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */ |
| 99 | |
| 100 | #if defined(XFS_ATTR_TRACE) |
| 101 | ktrace_t *xfs_attr_trace_buf; |
| 102 | #endif |
| 103 | |
| 104 | |
| 105 | /*======================================================================== |
| 106 | * Overall external interface routines. |
| 107 | *========================================================================*/ |
| 108 | |
| 109 | int |
Nathan Scott | 80cce77 | 2005-11-02 11:43:04 +1100 | [diff] [blame] | 110 | xfs_attr_fetch(xfs_inode_t *ip, const char *name, int namelen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | char *value, int *valuelenp, int flags, struct cred *cred) |
| 112 | { |
| 113 | xfs_da_args_t args; |
| 114 | int error; |
| 115 | |
| 116 | if ((XFS_IFORK_Q(ip) == 0) || |
| 117 | (ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && |
| 118 | ip->i_d.di_anextents == 0)) |
| 119 | return(ENOATTR); |
| 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | /* |
| 122 | * Fill in the arg structure for this request. |
| 123 | */ |
| 124 | memset((char *)&args, 0, sizeof(args)); |
| 125 | args.name = name; |
| 126 | args.namelen = namelen; |
| 127 | args.value = value; |
| 128 | args.valuelen = *valuelenp; |
| 129 | args.flags = flags; |
| 130 | args.hashval = xfs_da_hashname(args.name, args.namelen); |
| 131 | args.dp = ip; |
| 132 | args.whichfork = XFS_ATTR_FORK; |
| 133 | |
| 134 | /* |
| 135 | * Decide on what work routines to call based on the inode size. |
| 136 | */ |
| 137 | if (XFS_IFORK_Q(ip) == 0 || |
| 138 | (ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && |
| 139 | ip->i_d.di_anextents == 0)) { |
| 140 | error = XFS_ERROR(ENOATTR); |
| 141 | } else if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
| 142 | error = xfs_attr_shortform_getvalue(&args); |
| 143 | } else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK)) { |
| 144 | error = xfs_attr_leaf_get(&args); |
| 145 | } else { |
| 146 | error = xfs_attr_node_get(&args); |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | * Return the number of bytes in the value to the caller. |
| 151 | */ |
| 152 | *valuelenp = args.valuelen; |
| 153 | |
| 154 | if (error == EEXIST) |
| 155 | error = 0; |
| 156 | return(error); |
| 157 | } |
| 158 | |
| 159 | int |
Christoph Hellwig | 993386c1 | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 160 | xfs_attr_get( |
| 161 | xfs_inode_t *ip, |
| 162 | const char *name, |
| 163 | char *value, |
| 164 | int *valuelenp, |
| 165 | int flags, |
| 166 | cred_t *cred) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | int error, namelen; |
| 169 | |
| 170 | XFS_STATS_INC(xs_attr_get); |
| 171 | |
| 172 | if (!name) |
| 173 | return(EINVAL); |
| 174 | namelen = strlen(name); |
| 175 | if (namelen >= MAXNAMELEN) |
| 176 | return(EFAULT); /* match IRIX behaviour */ |
| 177 | |
| 178 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| 179 | return(EIO); |
| 180 | |
| 181 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 182 | error = xfs_attr_fetch(ip, name, namelen, value, valuelenp, flags, cred); |
| 183 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 184 | return(error); |
| 185 | } |
| 186 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 187 | int |
Nathan Scott | 80cce77 | 2005-11-02 11:43:04 +1100 | [diff] [blame] | 188 | xfs_attr_set_int(xfs_inode_t *dp, const char *name, int namelen, |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 189 | char *value, int valuelen, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
| 191 | xfs_da_args_t args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | xfs_fsblock_t firstblock; |
| 193 | xfs_bmap_free_t flist; |
| 194 | int error, err2, committed; |
| 195 | int local, size; |
| 196 | uint nblks; |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 197 | xfs_mount_t *mp = dp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | int rsvd = (flags & ATTR_ROOT) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
| 200 | /* |
| 201 | * Attach the dquots to the inode. |
| 202 | */ |
| 203 | if ((error = XFS_QM_DQATTACH(mp, dp, 0))) |
| 204 | return (error); |
| 205 | |
| 206 | /* |
| 207 | * If the inode doesn't have an attribute fork, add one. |
| 208 | * (inode must not be locked when we call this routine) |
| 209 | */ |
| 210 | if (XFS_IFORK_Q(dp) == 0) { |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 211 | int sf_size = sizeof(xfs_attr_sf_hdr_t) + |
| 212 | XFS_ATTR_SF_ENTSIZE_BYNAME(namelen, valuelen); |
| 213 | |
| 214 | if ((error = xfs_bmap_add_attrfork(dp, sf_size, rsvd))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | return(error); |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Fill in the arg structure for this request. |
| 220 | */ |
| 221 | memset((char *)&args, 0, sizeof(args)); |
| 222 | args.name = name; |
| 223 | args.namelen = namelen; |
| 224 | args.value = value; |
| 225 | args.valuelen = valuelen; |
| 226 | args.flags = flags; |
| 227 | args.hashval = xfs_da_hashname(args.name, args.namelen); |
| 228 | args.dp = dp; |
| 229 | args.firstblock = &firstblock; |
| 230 | args.flist = &flist; |
| 231 | args.whichfork = XFS_ATTR_FORK; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 232 | args.addname = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | args.oknoent = 1; |
| 234 | |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 235 | /* |
| 236 | * Determine space new attribute will use, and if it would be |
| 237 | * "local" or "remote" (note: local != inline). |
| 238 | */ |
| 239 | size = xfs_attr_leaf_newentsize(namelen, valuelen, |
| 240 | mp->m_sb.sb_blocksize, &local); |
| 241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK); |
| 243 | if (local) { |
| 244 | if (size > (mp->m_sb.sb_blocksize >> 1)) { |
| 245 | /* Double split possible */ |
| 246 | nblks <<= 1; |
| 247 | } |
| 248 | } else { |
| 249 | uint dblocks = XFS_B_TO_FSB(mp, valuelen); |
| 250 | /* Out of line attribute, cannot double split, but make |
| 251 | * room for the attribute value itself. |
| 252 | */ |
| 253 | nblks += dblocks; |
| 254 | nblks += XFS_NEXTENTADD_SPACE_RES(mp, dblocks, XFS_ATTR_FORK); |
| 255 | } |
| 256 | |
| 257 | /* Size is now blocks for attribute data */ |
| 258 | args.total = nblks; |
| 259 | |
| 260 | /* |
| 261 | * Start our first transaction of the day. |
| 262 | * |
| 263 | * All future transactions during this code must be "chained" off |
| 264 | * this one via the trans_dup() call. All transactions will contain |
| 265 | * the inode, and the inode will always be marked with trans_ihold(). |
| 266 | * Since the inode will be locked in all transactions, we must log |
| 267 | * the inode in every transaction to let it float upward through |
| 268 | * the log. |
| 269 | */ |
| 270 | args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_SET); |
| 271 | |
| 272 | /* |
| 273 | * Root fork attributes can use reserved data blocks for this |
| 274 | * operation if necessary |
| 275 | */ |
| 276 | |
| 277 | if (rsvd) |
| 278 | args.trans->t_flags |= XFS_TRANS_RESERVE; |
| 279 | |
| 280 | if ((error = xfs_trans_reserve(args.trans, (uint) nblks, |
| 281 | XFS_ATTRSET_LOG_RES(mp, nblks), |
| 282 | 0, XFS_TRANS_PERM_LOG_RES, |
| 283 | XFS_ATTRSET_LOG_COUNT))) { |
| 284 | xfs_trans_cancel(args.trans, 0); |
| 285 | return(error); |
| 286 | } |
| 287 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 288 | |
| 289 | error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, args.trans, dp, nblks, 0, |
| 290 | rsvd ? XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : |
| 291 | XFS_QMOPT_RES_REGBLKS); |
| 292 | if (error) { |
| 293 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 294 | xfs_trans_cancel(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
| 295 | return (error); |
| 296 | } |
| 297 | |
| 298 | xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); |
| 299 | xfs_trans_ihold(args.trans, dp); |
| 300 | |
| 301 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 302 | * If the attribute list is non-existent or a shortform list, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | * upgrade it to a single-leaf-block attribute list. |
| 304 | */ |
| 305 | if ((dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) || |
| 306 | ((dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) && |
| 307 | (dp->i_d.di_anextents == 0))) { |
| 308 | |
| 309 | /* |
| 310 | * Build initial attribute list (if required). |
| 311 | */ |
| 312 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 313 | xfs_attr_shortform_create(&args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
| 315 | /* |
| 316 | * Try to add the attr to the attribute list in |
| 317 | * the inode. |
| 318 | */ |
| 319 | error = xfs_attr_shortform_addname(&args); |
| 320 | if (error != ENOSPC) { |
| 321 | /* |
| 322 | * Commit the shortform mods, and we're done. |
| 323 | * NOTE: this is also the error path (EEXIST, etc). |
| 324 | */ |
| 325 | ASSERT(args.trans != NULL); |
| 326 | |
| 327 | /* |
| 328 | * If this is a synchronous mount, make sure that |
| 329 | * the transaction goes to disk before returning |
| 330 | * to the user. |
| 331 | */ |
| 332 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 333 | xfs_trans_set_sync(args.trans); |
| 334 | } |
| 335 | err2 = xfs_trans_commit(args.trans, |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 336 | XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 338 | |
| 339 | /* |
| 340 | * Hit the inode change time. |
| 341 | */ |
| 342 | if (!error && (flags & ATTR_KERNOTIME) == 0) { |
| 343 | xfs_ichgtime(dp, XFS_ICHGTIME_CHG); |
| 344 | } |
| 345 | return(error == 0 ? err2 : error); |
| 346 | } |
| 347 | |
| 348 | /* |
| 349 | * It won't fit in the shortform, transform to a leaf block. |
| 350 | * GROT: another possible req'mt for a double-split btree op. |
| 351 | */ |
| 352 | XFS_BMAP_INIT(args.flist, args.firstblock); |
| 353 | error = xfs_attr_shortform_to_leaf(&args); |
| 354 | if (!error) { |
| 355 | error = xfs_bmap_finish(&args.trans, args.flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 356 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | if (error) { |
| 359 | ASSERT(committed); |
| 360 | args.trans = NULL; |
| 361 | xfs_bmap_cancel(&flist); |
| 362 | goto out; |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | * bmap_finish() may have committed the last trans and started |
| 367 | * a new one. We need the inode to be in all transactions. |
| 368 | */ |
| 369 | if (committed) { |
| 370 | xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); |
| 371 | xfs_trans_ihold(args.trans, dp); |
| 372 | } |
| 373 | |
| 374 | /* |
| 375 | * Commit the leaf transformation. We'll need another (linked) |
| 376 | * transaction to add the new attribute to the leaf. |
| 377 | */ |
| 378 | if ((error = xfs_attr_rolltrans(&args.trans, dp))) |
| 379 | goto out; |
| 380 | |
| 381 | } |
| 382 | |
| 383 | if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 384 | error = xfs_attr_leaf_addname(&args); |
| 385 | } else { |
| 386 | error = xfs_attr_node_addname(&args); |
| 387 | } |
| 388 | if (error) { |
| 389 | goto out; |
| 390 | } |
| 391 | |
| 392 | /* |
| 393 | * If this is a synchronous mount, make sure that the |
| 394 | * transaction goes to disk before returning to the user. |
| 395 | */ |
| 396 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 397 | xfs_trans_set_sync(args.trans); |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | * Commit the last in the sequence of transactions. |
| 402 | */ |
| 403 | xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 404 | error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 406 | |
| 407 | /* |
| 408 | * Hit the inode change time. |
| 409 | */ |
| 410 | if (!error && (flags & ATTR_KERNOTIME) == 0) { |
| 411 | xfs_ichgtime(dp, XFS_ICHGTIME_CHG); |
| 412 | } |
| 413 | |
| 414 | return(error); |
| 415 | |
| 416 | out: |
| 417 | if (args.trans) |
| 418 | xfs_trans_cancel(args.trans, |
| 419 | XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 420 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 421 | return(error); |
| 422 | } |
| 423 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 424 | int |
Christoph Hellwig | 993386c1 | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 425 | xfs_attr_set( |
| 426 | xfs_inode_t *dp, |
| 427 | const char *name, |
| 428 | char *value, |
| 429 | int valuelen, |
| 430 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | { |
Christoph Hellwig | 3542c6e | 2006-01-09 20:52:00 -0800 | [diff] [blame] | 432 | int namelen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | namelen = strlen(name); |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 435 | if (namelen >= MAXNAMELEN) |
| 436 | return EFAULT; /* match IRIX behaviour */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 438 | XFS_STATS_INC(xs_attr_set); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 440 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | return (EIO); |
| 442 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 443 | return xfs_attr_set_int(dp, name, namelen, value, valuelen, flags); |
| 444 | } |
| 445 | |
| 446 | /* |
| 447 | * Generic handler routine to remove a name from an attribute list. |
| 448 | * Transitions attribute list from Btree to shortform as necessary. |
| 449 | */ |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 450 | int |
Nathan Scott | 80cce77 | 2005-11-02 11:43:04 +1100 | [diff] [blame] | 451 | xfs_attr_remove_int(xfs_inode_t *dp, const char *name, int namelen, int flags) |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 452 | { |
| 453 | xfs_da_args_t args; |
| 454 | xfs_fsblock_t firstblock; |
| 455 | xfs_bmap_free_t flist; |
| 456 | int error; |
| 457 | xfs_mount_t *mp = dp->i_mount; |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | /* |
| 460 | * Fill in the arg structure for this request. |
| 461 | */ |
| 462 | memset((char *)&args, 0, sizeof(args)); |
| 463 | args.name = name; |
| 464 | args.namelen = namelen; |
| 465 | args.flags = flags; |
| 466 | args.hashval = xfs_da_hashname(args.name, args.namelen); |
| 467 | args.dp = dp; |
| 468 | args.firstblock = &firstblock; |
| 469 | args.flist = &flist; |
| 470 | args.total = 0; |
| 471 | args.whichfork = XFS_ATTR_FORK; |
| 472 | |
| 473 | /* |
| 474 | * Attach the dquots to the inode. |
| 475 | */ |
| 476 | if ((error = XFS_QM_DQATTACH(mp, dp, 0))) |
| 477 | return (error); |
| 478 | |
| 479 | /* |
| 480 | * Start our first transaction of the day. |
| 481 | * |
| 482 | * All future transactions during this code must be "chained" off |
| 483 | * this one via the trans_dup() call. All transactions will contain |
| 484 | * the inode, and the inode will always be marked with trans_ihold(). |
| 485 | * Since the inode will be locked in all transactions, we must log |
| 486 | * the inode in every transaction to let it float upward through |
| 487 | * the log. |
| 488 | */ |
| 489 | args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_RM); |
| 490 | |
| 491 | /* |
| 492 | * Root fork attributes can use reserved data blocks for this |
| 493 | * operation if necessary |
| 494 | */ |
| 495 | |
| 496 | if (flags & ATTR_ROOT) |
| 497 | args.trans->t_flags |= XFS_TRANS_RESERVE; |
| 498 | |
| 499 | if ((error = xfs_trans_reserve(args.trans, |
| 500 | XFS_ATTRRM_SPACE_RES(mp), |
| 501 | XFS_ATTRRM_LOG_RES(mp), |
| 502 | 0, XFS_TRANS_PERM_LOG_RES, |
| 503 | XFS_ATTRRM_LOG_COUNT))) { |
| 504 | xfs_trans_cancel(args.trans, 0); |
| 505 | return(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 509 | /* |
| 510 | * No need to make quota reservations here. We expect to release some |
| 511 | * blocks not allocate in the common case. |
| 512 | */ |
| 513 | xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); |
| 514 | xfs_trans_ihold(args.trans, dp); |
| 515 | |
| 516 | /* |
| 517 | * Decide on what work routines to call based on the inode size. |
| 518 | */ |
| 519 | if (XFS_IFORK_Q(dp) == 0 || |
| 520 | (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && |
| 521 | dp->i_d.di_anextents == 0)) { |
| 522 | error = XFS_ERROR(ENOATTR); |
| 523 | goto out; |
| 524 | } |
| 525 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
| 526 | ASSERT(dp->i_afp->if_flags & XFS_IFINLINE); |
| 527 | error = xfs_attr_shortform_remove(&args); |
| 528 | if (error) { |
| 529 | goto out; |
| 530 | } |
| 531 | } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 532 | error = xfs_attr_leaf_removename(&args); |
| 533 | } else { |
| 534 | error = xfs_attr_node_removename(&args); |
| 535 | } |
| 536 | if (error) { |
| 537 | goto out; |
| 538 | } |
| 539 | |
| 540 | /* |
| 541 | * If this is a synchronous mount, make sure that the |
| 542 | * transaction goes to disk before returning to the user. |
| 543 | */ |
| 544 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 545 | xfs_trans_set_sync(args.trans); |
| 546 | } |
| 547 | |
| 548 | /* |
| 549 | * Commit the last in the sequence of transactions. |
| 550 | */ |
| 551 | xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 552 | error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 554 | |
| 555 | /* |
| 556 | * Hit the inode change time. |
| 557 | */ |
| 558 | if (!error && (flags & ATTR_KERNOTIME) == 0) { |
| 559 | xfs_ichgtime(dp, XFS_ICHGTIME_CHG); |
| 560 | } |
| 561 | |
| 562 | return(error); |
| 563 | |
| 564 | out: |
| 565 | if (args.trans) |
| 566 | xfs_trans_cancel(args.trans, |
| 567 | XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 568 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 569 | return(error); |
| 570 | } |
| 571 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 572 | int |
Christoph Hellwig | 993386c1 | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 573 | xfs_attr_remove( |
| 574 | xfs_inode_t *dp, |
| 575 | const char *name, |
| 576 | int flags) |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 577 | { |
Christoph Hellwig | 993386c1 | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 578 | int namelen; |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 579 | |
| 580 | namelen = strlen(name); |
| 581 | if (namelen >= MAXNAMELEN) |
| 582 | return EFAULT; /* match IRIX behaviour */ |
| 583 | |
| 584 | XFS_STATS_INC(xs_attr_remove); |
| 585 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 586 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| 587 | return (EIO); |
| 588 | |
| 589 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | 3542c6e | 2006-01-09 20:52:00 -0800 | [diff] [blame] | 590 | if (XFS_IFORK_Q(dp) == 0 || |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 591 | (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && |
| 592 | dp->i_d.di_anextents == 0)) { |
| 593 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 594 | return(XFS_ERROR(ENOATTR)); |
| 595 | } |
| 596 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 597 | |
| 598 | return xfs_attr_remove_int(dp, name, namelen, flags); |
| 599 | } |
| 600 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 601 | int /* error */ |
| 602 | xfs_attr_list_int(xfs_attr_list_context_t *context) |
| 603 | { |
| 604 | int error; |
| 605 | xfs_inode_t *dp = context->dp; |
| 606 | |
| 607 | /* |
| 608 | * Decide on what work routines to call based on the inode size. |
| 609 | */ |
| 610 | if (XFS_IFORK_Q(dp) == 0 || |
| 611 | (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && |
| 612 | dp->i_d.di_anextents == 0)) { |
| 613 | error = 0; |
| 614 | } else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
| 615 | error = xfs_attr_shortform_list(context); |
| 616 | } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 617 | error = xfs_attr_leaf_list(context); |
| 618 | } else { |
| 619 | error = xfs_attr_node_list(context); |
| 620 | } |
| 621 | return error; |
| 622 | } |
| 623 | |
| 624 | #define ATTR_ENTBASESIZE /* minimum bytes used by an attr */ \ |
| 625 | (((struct attrlist_ent *) 0)->a_name - (char *) 0) |
| 626 | #define ATTR_ENTSIZE(namelen) /* actual bytes used by an attr */ \ |
| 627 | ((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(u_int32_t)-1) \ |
| 628 | & ~(sizeof(u_int32_t)-1)) |
| 629 | |
| 630 | /* |
| 631 | * Format an attribute and copy it out to the user's buffer. |
| 632 | * Take care to check values and protect against them changing later, |
| 633 | * we may be reading them directly out of a user buffer. |
| 634 | */ |
| 635 | /*ARGSUSED*/ |
| 636 | STATIC int |
| 637 | xfs_attr_put_listent(xfs_attr_list_context_t *context, attrnames_t *namesp, |
| 638 | char *name, int namelen, |
| 639 | int valuelen, char *value) |
| 640 | { |
| 641 | attrlist_ent_t *aep; |
| 642 | int arraytop; |
| 643 | |
| 644 | ASSERT(!(context->flags & ATTR_KERNOVAL)); |
| 645 | ASSERT(context->count >= 0); |
| 646 | ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); |
| 647 | ASSERT(context->firstu >= sizeof(*context->alist)); |
| 648 | ASSERT(context->firstu <= context->bufsize); |
| 649 | |
| 650 | arraytop = sizeof(*context->alist) + |
| 651 | context->count * sizeof(context->alist->al_offset[0]); |
| 652 | context->firstu -= ATTR_ENTSIZE(namelen); |
| 653 | if (context->firstu < arraytop) { |
| 654 | xfs_attr_trace_l_c("buffer full", context); |
| 655 | context->alist->al_more = 1; |
| 656 | context->seen_enough = 1; |
| 657 | return 1; |
| 658 | } |
| 659 | |
| 660 | aep = (attrlist_ent_t *)&(((char *)context->alist)[ context->firstu ]); |
| 661 | aep->a_valuelen = valuelen; |
| 662 | memcpy(aep->a_name, name, namelen); |
| 663 | aep->a_name[ namelen ] = 0; |
| 664 | context->alist->al_offset[ context->count++ ] = context->firstu; |
| 665 | context->alist->al_count = context->count; |
| 666 | xfs_attr_trace_l_c("add", context); |
| 667 | return 0; |
| 668 | } |
| 669 | |
| 670 | STATIC int |
| 671 | xfs_attr_kern_list(xfs_attr_list_context_t *context, attrnames_t *namesp, |
| 672 | char *name, int namelen, |
| 673 | int valuelen, char *value) |
| 674 | { |
| 675 | char *offset; |
| 676 | int arraytop; |
| 677 | |
| 678 | ASSERT(context->count >= 0); |
| 679 | |
| 680 | arraytop = context->count + namesp->attr_namelen + namelen + 1; |
| 681 | if (arraytop > context->firstu) { |
| 682 | context->count = -1; /* insufficient space */ |
| 683 | return 1; |
| 684 | } |
| 685 | offset = (char *)context->alist + context->count; |
| 686 | strncpy(offset, namesp->attr_name, namesp->attr_namelen); |
| 687 | offset += namesp->attr_namelen; |
| 688 | strncpy(offset, name, namelen); /* real name */ |
| 689 | offset += namelen; |
| 690 | *offset = '\0'; |
| 691 | context->count += namesp->attr_namelen + namelen + 1; |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | /*ARGSUSED*/ |
| 696 | STATIC int |
| 697 | xfs_attr_kern_list_sizes(xfs_attr_list_context_t *context, attrnames_t *namesp, |
| 698 | char *name, int namelen, |
| 699 | int valuelen, char *value) |
| 700 | { |
| 701 | context->count += namesp->attr_namelen + namelen + 1; |
| 702 | return 0; |
| 703 | } |
| 704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | /* |
| 706 | * Generate a list of extended attribute names and optionally |
| 707 | * also value lengths. Positive return value follows the XFS |
| 708 | * convention of being an error, zero or negative return code |
| 709 | * is the length of the buffer returned (negated), indicating |
| 710 | * success. |
| 711 | */ |
| 712 | int |
Christoph Hellwig | 993386c1 | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 713 | xfs_attr_list( |
| 714 | xfs_inode_t *dp, |
| 715 | char *buffer, |
| 716 | int bufsize, |
| 717 | int flags, |
| 718 | attrlist_cursor_kern_t *cursor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | { |
| 720 | xfs_attr_list_context_t context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | int error; |
| 722 | |
| 723 | XFS_STATS_INC(xs_attr_list); |
| 724 | |
| 725 | /* |
| 726 | * Validate the cursor. |
| 727 | */ |
| 728 | if (cursor->pad1 || cursor->pad2) |
| 729 | return(XFS_ERROR(EINVAL)); |
| 730 | if ((cursor->initted == 0) && |
| 731 | (cursor->hashval || cursor->blkno || cursor->offset)) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 732 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | |
| 734 | /* |
| 735 | * Check for a properly aligned buffer. |
| 736 | */ |
| 737 | if (((long)buffer) & (sizeof(int)-1)) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 738 | return XFS_ERROR(EFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | if (flags & ATTR_KERNOVAL) |
| 740 | bufsize = 0; |
| 741 | |
| 742 | /* |
| 743 | * Initialize the output buffer. |
| 744 | */ |
Christoph Hellwig | 993386c1 | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 745 | context.dp = dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | context.cursor = cursor; |
| 747 | context.count = 0; |
| 748 | context.dupcnt = 0; |
| 749 | context.resynch = 1; |
| 750 | context.flags = flags; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 751 | context.seen_enough = 0; |
| 752 | context.alist = (attrlist_t *)buffer; |
| 753 | context.put_value = 0; |
| 754 | |
| 755 | if (flags & ATTR_KERNAMELS) { |
| 756 | context.bufsize = bufsize; |
| 757 | context.firstu = context.bufsize; |
| 758 | if (flags & ATTR_KERNOVAL) |
| 759 | context.put_listent = xfs_attr_kern_list_sizes; |
| 760 | else |
| 761 | context.put_listent = xfs_attr_kern_list; |
| 762 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */ |
| 764 | context.firstu = context.bufsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | context.alist->al_count = 0; |
| 766 | context.alist->al_more = 0; |
| 767 | context.alist->al_offset[0] = context.bufsize; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 768 | context.put_listent = xfs_attr_put_listent; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | } |
| 770 | |
| 771 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 772 | return EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
| 774 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | xfs_attr_trace_l_c("syscall start", &context); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 776 | |
| 777 | error = xfs_attr_list_int(&context); |
| 778 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 780 | xfs_attr_trace_l_c("syscall end", &context); |
| 781 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 782 | if (context.flags & (ATTR_KERNOVAL|ATTR_KERNAMELS)) { |
| 783 | /* must return negated buffer size or the error */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | if (context.count < 0) |
| 785 | error = XFS_ERROR(ERANGE); |
| 786 | else |
| 787 | error = -context.count; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 788 | } else |
| 789 | ASSERT(error >= 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 791 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | int /* error */ |
| 795 | xfs_attr_inactive(xfs_inode_t *dp) |
| 796 | { |
| 797 | xfs_trans_t *trans; |
| 798 | xfs_mount_t *mp; |
| 799 | int error; |
| 800 | |
| 801 | mp = dp->i_mount; |
| 802 | ASSERT(! XFS_NOT_DQATTACHED(mp, dp)); |
| 803 | |
| 804 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
| 805 | if ((XFS_IFORK_Q(dp) == 0) || |
| 806 | (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) || |
| 807 | (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && |
| 808 | dp->i_d.di_anextents == 0)) { |
| 809 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 810 | return(0); |
| 811 | } |
| 812 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 813 | |
| 814 | /* |
| 815 | * Start our first transaction of the day. |
| 816 | * |
| 817 | * All future transactions during this code must be "chained" off |
| 818 | * this one via the trans_dup() call. All transactions will contain |
| 819 | * the inode, and the inode will always be marked with trans_ihold(). |
| 820 | * Since the inode will be locked in all transactions, we must log |
| 821 | * the inode in every transaction to let it float upward through |
| 822 | * the log. |
| 823 | */ |
| 824 | trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL); |
| 825 | if ((error = xfs_trans_reserve(trans, 0, XFS_ATTRINVAL_LOG_RES(mp), 0, |
| 826 | XFS_TRANS_PERM_LOG_RES, |
| 827 | XFS_ATTRINVAL_LOG_COUNT))) { |
| 828 | xfs_trans_cancel(trans, 0); |
| 829 | return(error); |
| 830 | } |
| 831 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 832 | |
| 833 | /* |
| 834 | * No need to make quota reservations here. We expect to release some |
| 835 | * blocks, not allocate, in the common case. |
| 836 | */ |
| 837 | xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL); |
| 838 | xfs_trans_ihold(trans, dp); |
| 839 | |
| 840 | /* |
| 841 | * Decide on what work routines to call based on the inode size. |
| 842 | */ |
| 843 | if ((XFS_IFORK_Q(dp) == 0) || |
| 844 | (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) || |
| 845 | (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && |
| 846 | dp->i_d.di_anextents == 0)) { |
| 847 | error = 0; |
| 848 | goto out; |
| 849 | } |
| 850 | error = xfs_attr_root_inactive(&trans, dp); |
| 851 | if (error) |
| 852 | goto out; |
| 853 | /* |
| 854 | * signal synchronous inactive transactions unless this |
| 855 | * is a synchronous mount filesystem in which case we |
| 856 | * know that we're here because we've been called out of |
| 857 | * xfs_inactive which means that the last reference is gone |
| 858 | * and the unlink transaction has already hit the disk so |
| 859 | * async inactive transactions are safe. |
| 860 | */ |
| 861 | if ((error = xfs_itruncate_finish(&trans, dp, 0LL, XFS_ATTR_FORK, |
| 862 | (!(mp->m_flags & XFS_MOUNT_WSYNC) |
| 863 | ? 1 : 0)))) |
| 864 | goto out; |
| 865 | |
| 866 | /* |
| 867 | * Commit the last in the sequence of transactions. |
| 868 | */ |
| 869 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 870 | error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 872 | |
| 873 | return(error); |
| 874 | |
| 875 | out: |
| 876 | xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 877 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 878 | return(error); |
| 879 | } |
| 880 | |
| 881 | |
| 882 | |
| 883 | /*======================================================================== |
| 884 | * External routines when attribute list is inside the inode |
| 885 | *========================================================================*/ |
| 886 | |
| 887 | /* |
| 888 | * Add a name to the shortform attribute list structure |
| 889 | * This is the external routine. |
| 890 | */ |
| 891 | STATIC int |
| 892 | xfs_attr_shortform_addname(xfs_da_args_t *args) |
| 893 | { |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 894 | int newsize, forkoff, retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | |
| 896 | retval = xfs_attr_shortform_lookup(args); |
| 897 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { |
| 898 | return(retval); |
| 899 | } else if (retval == EEXIST) { |
| 900 | if (args->flags & ATTR_CREATE) |
| 901 | return(retval); |
| 902 | retval = xfs_attr_shortform_remove(args); |
| 903 | ASSERT(retval == 0); |
| 904 | } |
| 905 | |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 906 | if (args->namelen >= XFS_ATTR_SF_ENTSIZE_MAX || |
| 907 | args->valuelen >= XFS_ATTR_SF_ENTSIZE_MAX) |
| 908 | return(XFS_ERROR(ENOSPC)); |
| 909 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | newsize = XFS_ATTR_SF_TOTSIZE(args->dp); |
| 911 | newsize += XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 912 | |
| 913 | forkoff = xfs_attr_shortform_bytesfit(args->dp, newsize); |
| 914 | if (!forkoff) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | return(XFS_ERROR(ENOSPC)); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 916 | |
| 917 | xfs_attr_shortform_add(args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | return(0); |
| 919 | } |
| 920 | |
| 921 | |
| 922 | /*======================================================================== |
| 923 | * External routines when attribute list is one block |
| 924 | *========================================================================*/ |
| 925 | |
| 926 | /* |
| 927 | * Add a name to the leaf attribute list structure |
| 928 | * |
| 929 | * This leaf block cannot have a "remote" value, we only call this routine |
| 930 | * if bmap_one_block() says there is only one block (ie: no remote blks). |
| 931 | */ |
| 932 | int |
| 933 | xfs_attr_leaf_addname(xfs_da_args_t *args) |
| 934 | { |
| 935 | xfs_inode_t *dp; |
| 936 | xfs_dabuf_t *bp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 937 | int retval, error, committed, forkoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
| 939 | /* |
| 940 | * Read the (only) block in the attribute list in. |
| 941 | */ |
| 942 | dp = args->dp; |
| 943 | args->blkno = 0; |
| 944 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, |
| 945 | XFS_ATTR_FORK); |
| 946 | if (error) |
| 947 | return(error); |
| 948 | ASSERT(bp != NULL); |
| 949 | |
| 950 | /* |
| 951 | * Look up the given attribute in the leaf block. Figure out if |
| 952 | * the given flags produce an error or call for an atomic rename. |
| 953 | */ |
| 954 | retval = xfs_attr_leaf_lookup_int(bp, args); |
| 955 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { |
| 956 | xfs_da_brelse(args->trans, bp); |
| 957 | return(retval); |
| 958 | } else if (retval == EEXIST) { |
| 959 | if (args->flags & ATTR_CREATE) { /* pure create op */ |
| 960 | xfs_da_brelse(args->trans, bp); |
| 961 | return(retval); |
| 962 | } |
| 963 | args->rename = 1; /* an atomic rename */ |
| 964 | args->blkno2 = args->blkno; /* set 2nd entry info*/ |
| 965 | args->index2 = args->index; |
| 966 | args->rmtblkno2 = args->rmtblkno; |
| 967 | args->rmtblkcnt2 = args->rmtblkcnt; |
| 968 | } |
| 969 | |
| 970 | /* |
| 971 | * Add the attribute to the leaf block, transitioning to a Btree |
| 972 | * if required. |
| 973 | */ |
| 974 | retval = xfs_attr_leaf_add(bp, args); |
| 975 | xfs_da_buf_done(bp); |
| 976 | if (retval == ENOSPC) { |
| 977 | /* |
| 978 | * Promote the attribute list to the Btree format, then |
| 979 | * Commit that transaction so that the node_addname() call |
| 980 | * can manage its own transactions. |
| 981 | */ |
| 982 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 983 | error = xfs_attr_leaf_to_node(args); |
| 984 | if (!error) { |
| 985 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 986 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | } |
| 988 | if (error) { |
| 989 | ASSERT(committed); |
| 990 | args->trans = NULL; |
| 991 | xfs_bmap_cancel(args->flist); |
| 992 | return(error); |
| 993 | } |
| 994 | |
| 995 | /* |
| 996 | * bmap_finish() may have committed the last trans and started |
| 997 | * a new one. We need the inode to be in all transactions. |
| 998 | */ |
| 999 | if (committed) { |
| 1000 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1001 | xfs_trans_ihold(args->trans, dp); |
| 1002 | } |
| 1003 | |
| 1004 | /* |
| 1005 | * Commit the current trans (including the inode) and start |
| 1006 | * a new one. |
| 1007 | */ |
| 1008 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1009 | return (error); |
| 1010 | |
| 1011 | /* |
| 1012 | * Fob the whole rest of the problem off on the Btree code. |
| 1013 | */ |
| 1014 | error = xfs_attr_node_addname(args); |
| 1015 | return(error); |
| 1016 | } |
| 1017 | |
| 1018 | /* |
| 1019 | * Commit the transaction that added the attr name so that |
| 1020 | * later routines can manage their own transactions. |
| 1021 | */ |
| 1022 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1023 | return (error); |
| 1024 | |
| 1025 | /* |
| 1026 | * If there was an out-of-line value, allocate the blocks we |
| 1027 | * identified for its storage and copy the value. This is done |
| 1028 | * after we create the attribute so that we don't overflow the |
| 1029 | * maximum size of a transaction and/or hit a deadlock. |
| 1030 | */ |
| 1031 | if (args->rmtblkno > 0) { |
| 1032 | error = xfs_attr_rmtval_set(args); |
| 1033 | if (error) |
| 1034 | return(error); |
| 1035 | } |
| 1036 | |
| 1037 | /* |
| 1038 | * If this is an atomic rename operation, we must "flip" the |
| 1039 | * incomplete flags on the "new" and "old" attribute/value pairs |
| 1040 | * so that one disappears and one appears atomically. Then we |
| 1041 | * must remove the "old" attribute/value pair. |
| 1042 | */ |
| 1043 | if (args->rename) { |
| 1044 | /* |
| 1045 | * In a separate transaction, set the incomplete flag on the |
| 1046 | * "old" attr and clear the incomplete flag on the "new" attr. |
| 1047 | */ |
| 1048 | error = xfs_attr_leaf_flipflags(args); |
| 1049 | if (error) |
| 1050 | return(error); |
| 1051 | |
| 1052 | /* |
| 1053 | * Dismantle the "old" attribute/value pair by removing |
| 1054 | * a "remote" value (if it exists). |
| 1055 | */ |
| 1056 | args->index = args->index2; |
| 1057 | args->blkno = args->blkno2; |
| 1058 | args->rmtblkno = args->rmtblkno2; |
| 1059 | args->rmtblkcnt = args->rmtblkcnt2; |
| 1060 | if (args->rmtblkno) { |
| 1061 | error = xfs_attr_rmtval_remove(args); |
| 1062 | if (error) |
| 1063 | return(error); |
| 1064 | } |
| 1065 | |
| 1066 | /* |
| 1067 | * Read in the block containing the "old" attr, then |
| 1068 | * remove the "old" attr from that block (neat, huh!) |
| 1069 | */ |
| 1070 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, |
| 1071 | &bp, XFS_ATTR_FORK); |
| 1072 | if (error) |
| 1073 | return(error); |
| 1074 | ASSERT(bp != NULL); |
| 1075 | (void)xfs_attr_leaf_remove(bp, args); |
| 1076 | |
| 1077 | /* |
| 1078 | * If the result is small enough, shrink it all into the inode. |
| 1079 | */ |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1080 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | XFS_BMAP_INIT(args->flist, args->firstblock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1082 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | /* bp is gone due to xfs_da_shrink_inode */ |
| 1084 | if (!error) { |
| 1085 | error = xfs_bmap_finish(&args->trans, |
| 1086 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | &committed); |
| 1088 | } |
| 1089 | if (error) { |
| 1090 | ASSERT(committed); |
| 1091 | args->trans = NULL; |
| 1092 | xfs_bmap_cancel(args->flist); |
| 1093 | return(error); |
| 1094 | } |
| 1095 | |
| 1096 | /* |
| 1097 | * bmap_finish() may have committed the last trans |
| 1098 | * and started a new one. We need the inode to be |
| 1099 | * in all transactions. |
| 1100 | */ |
| 1101 | if (committed) { |
| 1102 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1103 | xfs_trans_ihold(args->trans, dp); |
| 1104 | } |
| 1105 | } else |
| 1106 | xfs_da_buf_done(bp); |
| 1107 | |
| 1108 | /* |
| 1109 | * Commit the remove and start the next trans in series. |
| 1110 | */ |
| 1111 | error = xfs_attr_rolltrans(&args->trans, dp); |
| 1112 | |
| 1113 | } else if (args->rmtblkno > 0) { |
| 1114 | /* |
| 1115 | * Added a "remote" value, just clear the incomplete flag. |
| 1116 | */ |
| 1117 | error = xfs_attr_leaf_clearflag(args); |
| 1118 | } |
| 1119 | return(error); |
| 1120 | } |
| 1121 | |
| 1122 | /* |
| 1123 | * Remove a name from the leaf attribute list structure |
| 1124 | * |
| 1125 | * This leaf block cannot have a "remote" value, we only call this routine |
| 1126 | * if bmap_one_block() says there is only one block (ie: no remote blks). |
| 1127 | */ |
| 1128 | STATIC int |
| 1129 | xfs_attr_leaf_removename(xfs_da_args_t *args) |
| 1130 | { |
| 1131 | xfs_inode_t *dp; |
| 1132 | xfs_dabuf_t *bp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1133 | int error, committed, forkoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | |
| 1135 | /* |
| 1136 | * Remove the attribute. |
| 1137 | */ |
| 1138 | dp = args->dp; |
| 1139 | args->blkno = 0; |
| 1140 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, |
| 1141 | XFS_ATTR_FORK); |
| 1142 | if (error) { |
| 1143 | return(error); |
| 1144 | } |
| 1145 | |
| 1146 | ASSERT(bp != NULL); |
| 1147 | error = xfs_attr_leaf_lookup_int(bp, args); |
| 1148 | if (error == ENOATTR) { |
| 1149 | xfs_da_brelse(args->trans, bp); |
| 1150 | return(error); |
| 1151 | } |
| 1152 | |
| 1153 | (void)xfs_attr_leaf_remove(bp, args); |
| 1154 | |
| 1155 | /* |
| 1156 | * If the result is small enough, shrink it all into the inode. |
| 1157 | */ |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1158 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | XFS_BMAP_INIT(args->flist, args->firstblock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1160 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | /* bp is gone due to xfs_da_shrink_inode */ |
| 1162 | if (!error) { |
| 1163 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1164 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | } |
| 1166 | if (error) { |
| 1167 | ASSERT(committed); |
| 1168 | args->trans = NULL; |
| 1169 | xfs_bmap_cancel(args->flist); |
| 1170 | return(error); |
| 1171 | } |
| 1172 | |
| 1173 | /* |
| 1174 | * bmap_finish() may have committed the last trans and started |
| 1175 | * a new one. We need the inode to be in all transactions. |
| 1176 | */ |
| 1177 | if (committed) { |
| 1178 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1179 | xfs_trans_ihold(args->trans, dp); |
| 1180 | } |
| 1181 | } else |
| 1182 | xfs_da_buf_done(bp); |
| 1183 | return(0); |
| 1184 | } |
| 1185 | |
| 1186 | /* |
| 1187 | * Look up a name in a leaf attribute list structure. |
| 1188 | * |
| 1189 | * This leaf block cannot have a "remote" value, we only call this routine |
| 1190 | * if bmap_one_block() says there is only one block (ie: no remote blks). |
| 1191 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1192 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | xfs_attr_leaf_get(xfs_da_args_t *args) |
| 1194 | { |
| 1195 | xfs_dabuf_t *bp; |
| 1196 | int error; |
| 1197 | |
| 1198 | args->blkno = 0; |
| 1199 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, |
| 1200 | XFS_ATTR_FORK); |
| 1201 | if (error) |
| 1202 | return(error); |
| 1203 | ASSERT(bp != NULL); |
| 1204 | |
| 1205 | error = xfs_attr_leaf_lookup_int(bp, args); |
| 1206 | if (error != EEXIST) { |
| 1207 | xfs_da_brelse(args->trans, bp); |
| 1208 | return(error); |
| 1209 | } |
| 1210 | error = xfs_attr_leaf_getvalue(bp, args); |
| 1211 | xfs_da_brelse(args->trans, bp); |
| 1212 | if (!error && (args->rmtblkno > 0) && !(args->flags & ATTR_KERNOVAL)) { |
| 1213 | error = xfs_attr_rmtval_get(args); |
| 1214 | } |
| 1215 | return(error); |
| 1216 | } |
| 1217 | |
| 1218 | /* |
| 1219 | * Copy out attribute entries for attr_list(), for leaf attribute lists. |
| 1220 | */ |
| 1221 | STATIC int |
| 1222 | xfs_attr_leaf_list(xfs_attr_list_context_t *context) |
| 1223 | { |
| 1224 | xfs_attr_leafblock_t *leaf; |
| 1225 | int error; |
| 1226 | xfs_dabuf_t *bp; |
| 1227 | |
| 1228 | context->cursor->blkno = 0; |
| 1229 | error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK); |
| 1230 | if (error) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1231 | return XFS_ERROR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | ASSERT(bp != NULL); |
| 1233 | leaf = bp->data; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1234 | if (unlikely(be16_to_cpu(leaf->hdr.info.magic) != XFS_ATTR_LEAF_MAGIC)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW, |
| 1236 | context->dp->i_mount, leaf); |
| 1237 | xfs_da_brelse(NULL, bp); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1238 | return XFS_ERROR(EFSCORRUPTED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | } |
| 1240 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1241 | error = xfs_attr_leaf_list_int(bp, context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | xfs_da_brelse(NULL, bp); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1243 | return XFS_ERROR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | } |
| 1245 | |
| 1246 | |
| 1247 | /*======================================================================== |
| 1248 | * External routines when attribute list size > XFS_LBSIZE(mp). |
| 1249 | *========================================================================*/ |
| 1250 | |
| 1251 | /* |
| 1252 | * Add a name to a Btree-format attribute list. |
| 1253 | * |
| 1254 | * This will involve walking down the Btree, and may involve splitting |
| 1255 | * leaf nodes and even splitting intermediate nodes up to and including |
| 1256 | * the root node (a special case of an intermediate node). |
| 1257 | * |
| 1258 | * "Remote" attribute values confuse the issue and atomic rename operations |
| 1259 | * add a whole extra layer of confusion on top of that. |
| 1260 | */ |
| 1261 | STATIC int |
| 1262 | xfs_attr_node_addname(xfs_da_args_t *args) |
| 1263 | { |
| 1264 | xfs_da_state_t *state; |
| 1265 | xfs_da_state_blk_t *blk; |
| 1266 | xfs_inode_t *dp; |
| 1267 | xfs_mount_t *mp; |
| 1268 | int committed, retval, error; |
| 1269 | |
| 1270 | /* |
| 1271 | * Fill in bucket of arguments/results/context to carry around. |
| 1272 | */ |
| 1273 | dp = args->dp; |
| 1274 | mp = dp->i_mount; |
| 1275 | restart: |
| 1276 | state = xfs_da_state_alloc(); |
| 1277 | state->args = args; |
| 1278 | state->mp = mp; |
| 1279 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1280 | state->node_ents = state->mp->m_attr_node_ents; |
| 1281 | |
| 1282 | /* |
| 1283 | * Search to see if name already exists, and get back a pointer |
| 1284 | * to where it should go. |
| 1285 | */ |
| 1286 | error = xfs_da_node_lookup_int(state, &retval); |
| 1287 | if (error) |
| 1288 | goto out; |
| 1289 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1290 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1291 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { |
| 1292 | goto out; |
| 1293 | } else if (retval == EEXIST) { |
| 1294 | if (args->flags & ATTR_CREATE) |
| 1295 | goto out; |
| 1296 | args->rename = 1; /* atomic rename op */ |
| 1297 | args->blkno2 = args->blkno; /* set 2nd entry info*/ |
| 1298 | args->index2 = args->index; |
| 1299 | args->rmtblkno2 = args->rmtblkno; |
| 1300 | args->rmtblkcnt2 = args->rmtblkcnt; |
| 1301 | args->rmtblkno = 0; |
| 1302 | args->rmtblkcnt = 0; |
| 1303 | } |
| 1304 | |
| 1305 | retval = xfs_attr_leaf_add(blk->bp, state->args); |
| 1306 | if (retval == ENOSPC) { |
| 1307 | if (state->path.active == 1) { |
| 1308 | /* |
| 1309 | * Its really a single leaf node, but it had |
| 1310 | * out-of-line values so it looked like it *might* |
| 1311 | * have been a b-tree. |
| 1312 | */ |
| 1313 | xfs_da_state_free(state); |
| 1314 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 1315 | error = xfs_attr_leaf_to_node(args); |
| 1316 | if (!error) { |
| 1317 | error = xfs_bmap_finish(&args->trans, |
| 1318 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | &committed); |
| 1320 | } |
| 1321 | if (error) { |
| 1322 | ASSERT(committed); |
| 1323 | args->trans = NULL; |
| 1324 | xfs_bmap_cancel(args->flist); |
| 1325 | goto out; |
| 1326 | } |
| 1327 | |
| 1328 | /* |
| 1329 | * bmap_finish() may have committed the last trans |
| 1330 | * and started a new one. We need the inode to be |
| 1331 | * in all transactions. |
| 1332 | */ |
| 1333 | if (committed) { |
| 1334 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1335 | xfs_trans_ihold(args->trans, dp); |
| 1336 | } |
| 1337 | |
| 1338 | /* |
| 1339 | * Commit the node conversion and start the next |
| 1340 | * trans in the chain. |
| 1341 | */ |
| 1342 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1343 | goto out; |
| 1344 | |
| 1345 | goto restart; |
| 1346 | } |
| 1347 | |
| 1348 | /* |
| 1349 | * Split as many Btree elements as required. |
| 1350 | * This code tracks the new and old attr's location |
| 1351 | * in the index/blkno/rmtblkno/rmtblkcnt fields and |
| 1352 | * in the index2/blkno2/rmtblkno2/rmtblkcnt2 fields. |
| 1353 | */ |
| 1354 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 1355 | error = xfs_da_split(state); |
| 1356 | if (!error) { |
| 1357 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1358 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | } |
| 1360 | if (error) { |
| 1361 | ASSERT(committed); |
| 1362 | args->trans = NULL; |
| 1363 | xfs_bmap_cancel(args->flist); |
| 1364 | goto out; |
| 1365 | } |
| 1366 | |
| 1367 | /* |
| 1368 | * bmap_finish() may have committed the last trans and started |
| 1369 | * a new one. We need the inode to be in all transactions. |
| 1370 | */ |
| 1371 | if (committed) { |
| 1372 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1373 | xfs_trans_ihold(args->trans, dp); |
| 1374 | } |
| 1375 | } else { |
| 1376 | /* |
| 1377 | * Addition succeeded, update Btree hashvals. |
| 1378 | */ |
| 1379 | xfs_da_fixhashpath(state, &state->path); |
| 1380 | } |
| 1381 | |
| 1382 | /* |
| 1383 | * Kill the state structure, we're done with it and need to |
| 1384 | * allow the buffers to come back later. |
| 1385 | */ |
| 1386 | xfs_da_state_free(state); |
| 1387 | state = NULL; |
| 1388 | |
| 1389 | /* |
| 1390 | * Commit the leaf addition or btree split and start the next |
| 1391 | * trans in the chain. |
| 1392 | */ |
| 1393 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1394 | goto out; |
| 1395 | |
| 1396 | /* |
| 1397 | * If there was an out-of-line value, allocate the blocks we |
| 1398 | * identified for its storage and copy the value. This is done |
| 1399 | * after we create the attribute so that we don't overflow the |
| 1400 | * maximum size of a transaction and/or hit a deadlock. |
| 1401 | */ |
| 1402 | if (args->rmtblkno > 0) { |
| 1403 | error = xfs_attr_rmtval_set(args); |
| 1404 | if (error) |
| 1405 | return(error); |
| 1406 | } |
| 1407 | |
| 1408 | /* |
| 1409 | * If this is an atomic rename operation, we must "flip" the |
| 1410 | * incomplete flags on the "new" and "old" attribute/value pairs |
| 1411 | * so that one disappears and one appears atomically. Then we |
| 1412 | * must remove the "old" attribute/value pair. |
| 1413 | */ |
| 1414 | if (args->rename) { |
| 1415 | /* |
| 1416 | * In a separate transaction, set the incomplete flag on the |
| 1417 | * "old" attr and clear the incomplete flag on the "new" attr. |
| 1418 | */ |
| 1419 | error = xfs_attr_leaf_flipflags(args); |
| 1420 | if (error) |
| 1421 | goto out; |
| 1422 | |
| 1423 | /* |
| 1424 | * Dismantle the "old" attribute/value pair by removing |
| 1425 | * a "remote" value (if it exists). |
| 1426 | */ |
| 1427 | args->index = args->index2; |
| 1428 | args->blkno = args->blkno2; |
| 1429 | args->rmtblkno = args->rmtblkno2; |
| 1430 | args->rmtblkcnt = args->rmtblkcnt2; |
| 1431 | if (args->rmtblkno) { |
| 1432 | error = xfs_attr_rmtval_remove(args); |
| 1433 | if (error) |
| 1434 | return(error); |
| 1435 | } |
| 1436 | |
| 1437 | /* |
| 1438 | * Re-find the "old" attribute entry after any split ops. |
| 1439 | * The INCOMPLETE flag means that we will find the "old" |
| 1440 | * attr, not the "new" one. |
| 1441 | */ |
| 1442 | args->flags |= XFS_ATTR_INCOMPLETE; |
| 1443 | state = xfs_da_state_alloc(); |
| 1444 | state->args = args; |
| 1445 | state->mp = mp; |
| 1446 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1447 | state->node_ents = state->mp->m_attr_node_ents; |
| 1448 | state->inleaf = 0; |
| 1449 | error = xfs_da_node_lookup_int(state, &retval); |
| 1450 | if (error) |
| 1451 | goto out; |
| 1452 | |
| 1453 | /* |
| 1454 | * Remove the name and update the hashvals in the tree. |
| 1455 | */ |
| 1456 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1457 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1458 | error = xfs_attr_leaf_remove(blk->bp, args); |
| 1459 | xfs_da_fixhashpath(state, &state->path); |
| 1460 | |
| 1461 | /* |
| 1462 | * Check to see if the tree needs to be collapsed. |
| 1463 | */ |
| 1464 | if (retval && (state->path.active > 1)) { |
| 1465 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 1466 | error = xfs_da_join(state); |
| 1467 | if (!error) { |
| 1468 | error = xfs_bmap_finish(&args->trans, |
| 1469 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | &committed); |
| 1471 | } |
| 1472 | if (error) { |
| 1473 | ASSERT(committed); |
| 1474 | args->trans = NULL; |
| 1475 | xfs_bmap_cancel(args->flist); |
| 1476 | goto out; |
| 1477 | } |
| 1478 | |
| 1479 | /* |
| 1480 | * bmap_finish() may have committed the last trans |
| 1481 | * and started a new one. We need the inode to be |
| 1482 | * in all transactions. |
| 1483 | */ |
| 1484 | if (committed) { |
| 1485 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1486 | xfs_trans_ihold(args->trans, dp); |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | /* |
| 1491 | * Commit and start the next trans in the chain. |
| 1492 | */ |
| 1493 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1494 | goto out; |
| 1495 | |
| 1496 | } else if (args->rmtblkno > 0) { |
| 1497 | /* |
| 1498 | * Added a "remote" value, just clear the incomplete flag. |
| 1499 | */ |
| 1500 | error = xfs_attr_leaf_clearflag(args); |
| 1501 | if (error) |
| 1502 | goto out; |
| 1503 | } |
| 1504 | retval = error = 0; |
| 1505 | |
| 1506 | out: |
| 1507 | if (state) |
| 1508 | xfs_da_state_free(state); |
| 1509 | if (error) |
| 1510 | return(error); |
| 1511 | return(retval); |
| 1512 | } |
| 1513 | |
| 1514 | /* |
| 1515 | * Remove a name from a B-tree attribute list. |
| 1516 | * |
| 1517 | * This will involve walking down the Btree, and may involve joining |
| 1518 | * leaf nodes and even joining intermediate nodes up to and including |
| 1519 | * the root node (a special case of an intermediate node). |
| 1520 | */ |
| 1521 | STATIC int |
| 1522 | xfs_attr_node_removename(xfs_da_args_t *args) |
| 1523 | { |
| 1524 | xfs_da_state_t *state; |
| 1525 | xfs_da_state_blk_t *blk; |
| 1526 | xfs_inode_t *dp; |
| 1527 | xfs_dabuf_t *bp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1528 | int retval, error, committed, forkoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | |
| 1530 | /* |
| 1531 | * Tie a string around our finger to remind us where we are. |
| 1532 | */ |
| 1533 | dp = args->dp; |
| 1534 | state = xfs_da_state_alloc(); |
| 1535 | state->args = args; |
| 1536 | state->mp = dp->i_mount; |
| 1537 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1538 | state->node_ents = state->mp->m_attr_node_ents; |
| 1539 | |
| 1540 | /* |
| 1541 | * Search to see if name exists, and get back a pointer to it. |
| 1542 | */ |
| 1543 | error = xfs_da_node_lookup_int(state, &retval); |
| 1544 | if (error || (retval != EEXIST)) { |
| 1545 | if (error == 0) |
| 1546 | error = retval; |
| 1547 | goto out; |
| 1548 | } |
| 1549 | |
| 1550 | /* |
| 1551 | * If there is an out-of-line value, de-allocate the blocks. |
| 1552 | * This is done before we remove the attribute so that we don't |
| 1553 | * overflow the maximum size of a transaction and/or hit a deadlock. |
| 1554 | */ |
| 1555 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1556 | ASSERT(blk->bp != NULL); |
| 1557 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1558 | if (args->rmtblkno > 0) { |
| 1559 | /* |
| 1560 | * Fill in disk block numbers in the state structure |
| 1561 | * so that we can get the buffers back after we commit |
| 1562 | * several transactions in the following calls. |
| 1563 | */ |
| 1564 | error = xfs_attr_fillstate(state); |
| 1565 | if (error) |
| 1566 | goto out; |
| 1567 | |
| 1568 | /* |
| 1569 | * Mark the attribute as INCOMPLETE, then bunmapi() the |
| 1570 | * remote value. |
| 1571 | */ |
| 1572 | error = xfs_attr_leaf_setflag(args); |
| 1573 | if (error) |
| 1574 | goto out; |
| 1575 | error = xfs_attr_rmtval_remove(args); |
| 1576 | if (error) |
| 1577 | goto out; |
| 1578 | |
| 1579 | /* |
| 1580 | * Refill the state structure with buffers, the prior calls |
| 1581 | * released our buffers. |
| 1582 | */ |
| 1583 | error = xfs_attr_refillstate(state); |
| 1584 | if (error) |
| 1585 | goto out; |
| 1586 | } |
| 1587 | |
| 1588 | /* |
| 1589 | * Remove the name and update the hashvals in the tree. |
| 1590 | */ |
| 1591 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1592 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1593 | retval = xfs_attr_leaf_remove(blk->bp, args); |
| 1594 | xfs_da_fixhashpath(state, &state->path); |
| 1595 | |
| 1596 | /* |
| 1597 | * Check to see if the tree needs to be collapsed. |
| 1598 | */ |
| 1599 | if (retval && (state->path.active > 1)) { |
| 1600 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 1601 | error = xfs_da_join(state); |
| 1602 | if (!error) { |
| 1603 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1604 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | } |
| 1606 | if (error) { |
| 1607 | ASSERT(committed); |
| 1608 | args->trans = NULL; |
| 1609 | xfs_bmap_cancel(args->flist); |
| 1610 | goto out; |
| 1611 | } |
| 1612 | |
| 1613 | /* |
| 1614 | * bmap_finish() may have committed the last trans and started |
| 1615 | * a new one. We need the inode to be in all transactions. |
| 1616 | */ |
| 1617 | if (committed) { |
| 1618 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1619 | xfs_trans_ihold(args->trans, dp); |
| 1620 | } |
| 1621 | |
| 1622 | /* |
| 1623 | * Commit the Btree join operation and start a new trans. |
| 1624 | */ |
| 1625 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1626 | goto out; |
| 1627 | } |
| 1628 | |
| 1629 | /* |
| 1630 | * If the result is small enough, push it all into the inode. |
| 1631 | */ |
| 1632 | if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 1633 | /* |
| 1634 | * Have to get rid of the copy of this dabuf in the state. |
| 1635 | */ |
| 1636 | ASSERT(state->path.active == 1); |
| 1637 | ASSERT(state->path.blk[0].bp); |
| 1638 | xfs_da_buf_done(state->path.blk[0].bp); |
| 1639 | state->path.blk[0].bp = NULL; |
| 1640 | |
| 1641 | error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, |
| 1642 | XFS_ATTR_FORK); |
| 1643 | if (error) |
| 1644 | goto out; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1645 | ASSERT(be16_to_cpu(((xfs_attr_leafblock_t *) |
| 1646 | bp->data)->hdr.info.magic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | == XFS_ATTR_LEAF_MAGIC); |
| 1648 | |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1649 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | XFS_BMAP_INIT(args->flist, args->firstblock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1651 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | /* bp is gone due to xfs_da_shrink_inode */ |
| 1653 | if (!error) { |
| 1654 | error = xfs_bmap_finish(&args->trans, |
| 1655 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | &committed); |
| 1657 | } |
| 1658 | if (error) { |
| 1659 | ASSERT(committed); |
| 1660 | args->trans = NULL; |
| 1661 | xfs_bmap_cancel(args->flist); |
| 1662 | goto out; |
| 1663 | } |
| 1664 | |
| 1665 | /* |
| 1666 | * bmap_finish() may have committed the last trans |
| 1667 | * and started a new one. We need the inode to be |
| 1668 | * in all transactions. |
| 1669 | */ |
| 1670 | if (committed) { |
| 1671 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1672 | xfs_trans_ihold(args->trans, dp); |
| 1673 | } |
| 1674 | } else |
| 1675 | xfs_da_brelse(args->trans, bp); |
| 1676 | } |
| 1677 | error = 0; |
| 1678 | |
| 1679 | out: |
| 1680 | xfs_da_state_free(state); |
| 1681 | return(error); |
| 1682 | } |
| 1683 | |
| 1684 | /* |
| 1685 | * Fill in the disk block numbers in the state structure for the buffers |
| 1686 | * that are attached to the state structure. |
| 1687 | * This is done so that we can quickly reattach ourselves to those buffers |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1688 | * after some set of transaction commits have released these buffers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | */ |
| 1690 | STATIC int |
| 1691 | xfs_attr_fillstate(xfs_da_state_t *state) |
| 1692 | { |
| 1693 | xfs_da_state_path_t *path; |
| 1694 | xfs_da_state_blk_t *blk; |
| 1695 | int level; |
| 1696 | |
| 1697 | /* |
| 1698 | * Roll down the "path" in the state structure, storing the on-disk |
| 1699 | * block number for those buffers in the "path". |
| 1700 | */ |
| 1701 | path = &state->path; |
| 1702 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1703 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1704 | if (blk->bp) { |
| 1705 | blk->disk_blkno = xfs_da_blkno(blk->bp); |
| 1706 | xfs_da_buf_done(blk->bp); |
| 1707 | blk->bp = NULL; |
| 1708 | } else { |
| 1709 | blk->disk_blkno = 0; |
| 1710 | } |
| 1711 | } |
| 1712 | |
| 1713 | /* |
| 1714 | * Roll down the "altpath" in the state structure, storing the on-disk |
| 1715 | * block number for those buffers in the "altpath". |
| 1716 | */ |
| 1717 | path = &state->altpath; |
| 1718 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1719 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1720 | if (blk->bp) { |
| 1721 | blk->disk_blkno = xfs_da_blkno(blk->bp); |
| 1722 | xfs_da_buf_done(blk->bp); |
| 1723 | blk->bp = NULL; |
| 1724 | } else { |
| 1725 | blk->disk_blkno = 0; |
| 1726 | } |
| 1727 | } |
| 1728 | |
| 1729 | return(0); |
| 1730 | } |
| 1731 | |
| 1732 | /* |
| 1733 | * Reattach the buffers to the state structure based on the disk block |
| 1734 | * numbers stored in the state structure. |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1735 | * This is done after some set of transaction commits have released those |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | * buffers from our grip. |
| 1737 | */ |
| 1738 | STATIC int |
| 1739 | xfs_attr_refillstate(xfs_da_state_t *state) |
| 1740 | { |
| 1741 | xfs_da_state_path_t *path; |
| 1742 | xfs_da_state_blk_t *blk; |
| 1743 | int level, error; |
| 1744 | |
| 1745 | /* |
| 1746 | * Roll down the "path" in the state structure, storing the on-disk |
| 1747 | * block number for those buffers in the "path". |
| 1748 | */ |
| 1749 | path = &state->path; |
| 1750 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1751 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1752 | if (blk->disk_blkno) { |
| 1753 | error = xfs_da_read_buf(state->args->trans, |
| 1754 | state->args->dp, |
| 1755 | blk->blkno, blk->disk_blkno, |
| 1756 | &blk->bp, XFS_ATTR_FORK); |
| 1757 | if (error) |
| 1758 | return(error); |
| 1759 | } else { |
| 1760 | blk->bp = NULL; |
| 1761 | } |
| 1762 | } |
| 1763 | |
| 1764 | /* |
| 1765 | * Roll down the "altpath" in the state structure, storing the on-disk |
| 1766 | * block number for those buffers in the "altpath". |
| 1767 | */ |
| 1768 | path = &state->altpath; |
| 1769 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1770 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1771 | if (blk->disk_blkno) { |
| 1772 | error = xfs_da_read_buf(state->args->trans, |
| 1773 | state->args->dp, |
| 1774 | blk->blkno, blk->disk_blkno, |
| 1775 | &blk->bp, XFS_ATTR_FORK); |
| 1776 | if (error) |
| 1777 | return(error); |
| 1778 | } else { |
| 1779 | blk->bp = NULL; |
| 1780 | } |
| 1781 | } |
| 1782 | |
| 1783 | return(0); |
| 1784 | } |
| 1785 | |
| 1786 | /* |
| 1787 | * Look up a filename in a node attribute list. |
| 1788 | * |
| 1789 | * This routine gets called for any attribute fork that has more than one |
| 1790 | * block, ie: both true Btree attr lists and for single-leaf-blocks with |
| 1791 | * "remote" values taking up more blocks. |
| 1792 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1793 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | xfs_attr_node_get(xfs_da_args_t *args) |
| 1795 | { |
| 1796 | xfs_da_state_t *state; |
| 1797 | xfs_da_state_blk_t *blk; |
| 1798 | int error, retval; |
| 1799 | int i; |
| 1800 | |
| 1801 | state = xfs_da_state_alloc(); |
| 1802 | state->args = args; |
| 1803 | state->mp = args->dp->i_mount; |
| 1804 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1805 | state->node_ents = state->mp->m_attr_node_ents; |
| 1806 | |
| 1807 | /* |
| 1808 | * Search to see if name exists, and get back a pointer to it. |
| 1809 | */ |
| 1810 | error = xfs_da_node_lookup_int(state, &retval); |
| 1811 | if (error) { |
| 1812 | retval = error; |
| 1813 | } else if (retval == EEXIST) { |
| 1814 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1815 | ASSERT(blk->bp != NULL); |
| 1816 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1817 | |
| 1818 | /* |
| 1819 | * Get the value, local or "remote" |
| 1820 | */ |
| 1821 | retval = xfs_attr_leaf_getvalue(blk->bp, args); |
| 1822 | if (!retval && (args->rmtblkno > 0) |
| 1823 | && !(args->flags & ATTR_KERNOVAL)) { |
| 1824 | retval = xfs_attr_rmtval_get(args); |
| 1825 | } |
| 1826 | } |
| 1827 | |
| 1828 | /* |
| 1829 | * If not in a transaction, we have to release all the buffers. |
| 1830 | */ |
| 1831 | for (i = 0; i < state->path.active; i++) { |
| 1832 | xfs_da_brelse(args->trans, state->path.blk[i].bp); |
| 1833 | state->path.blk[i].bp = NULL; |
| 1834 | } |
| 1835 | |
| 1836 | xfs_da_state_free(state); |
| 1837 | return(retval); |
| 1838 | } |
| 1839 | |
| 1840 | STATIC int /* error */ |
| 1841 | xfs_attr_node_list(xfs_attr_list_context_t *context) |
| 1842 | { |
| 1843 | attrlist_cursor_kern_t *cursor; |
| 1844 | xfs_attr_leafblock_t *leaf; |
| 1845 | xfs_da_intnode_t *node; |
| 1846 | xfs_da_node_entry_t *btree; |
| 1847 | int error, i; |
| 1848 | xfs_dabuf_t *bp; |
| 1849 | |
| 1850 | cursor = context->cursor; |
| 1851 | cursor->initted = 1; |
| 1852 | |
| 1853 | /* |
| 1854 | * Do all sorts of validation on the passed-in cursor structure. |
| 1855 | * If anything is amiss, ignore the cursor and look up the hashval |
| 1856 | * starting from the btree root. |
| 1857 | */ |
| 1858 | bp = NULL; |
| 1859 | if (cursor->blkno > 0) { |
| 1860 | error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, |
| 1861 | &bp, XFS_ATTR_FORK); |
| 1862 | if ((error != 0) && (error != EFSCORRUPTED)) |
| 1863 | return(error); |
| 1864 | if (bp) { |
| 1865 | node = bp->data; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1866 | switch (be16_to_cpu(node->hdr.info.magic)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | case XFS_DA_NODE_MAGIC: |
| 1868 | xfs_attr_trace_l_cn("wrong blk", context, node); |
| 1869 | xfs_da_brelse(NULL, bp); |
| 1870 | bp = NULL; |
| 1871 | break; |
| 1872 | case XFS_ATTR_LEAF_MAGIC: |
| 1873 | leaf = bp->data; |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1874 | if (cursor->hashval > be32_to_cpu(leaf->entries[ |
| 1875 | be16_to_cpu(leaf->hdr.count)-1].hashval)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | xfs_attr_trace_l_cl("wrong blk", |
| 1877 | context, leaf); |
| 1878 | xfs_da_brelse(NULL, bp); |
| 1879 | bp = NULL; |
| 1880 | } else if (cursor->hashval <= |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1881 | be32_to_cpu(leaf->entries[0].hashval)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | xfs_attr_trace_l_cl("maybe wrong blk", |
| 1883 | context, leaf); |
| 1884 | xfs_da_brelse(NULL, bp); |
| 1885 | bp = NULL; |
| 1886 | } |
| 1887 | break; |
| 1888 | default: |
| 1889 | xfs_attr_trace_l_c("wrong blk - ??", context); |
| 1890 | xfs_da_brelse(NULL, bp); |
| 1891 | bp = NULL; |
| 1892 | } |
| 1893 | } |
| 1894 | } |
| 1895 | |
| 1896 | /* |
| 1897 | * We did not find what we expected given the cursor's contents, |
| 1898 | * so we start from the top and work down based on the hash value. |
| 1899 | * Note that start of node block is same as start of leaf block. |
| 1900 | */ |
| 1901 | if (bp == NULL) { |
| 1902 | cursor->blkno = 0; |
| 1903 | for (;;) { |
| 1904 | error = xfs_da_read_buf(NULL, context->dp, |
| 1905 | cursor->blkno, -1, &bp, |
| 1906 | XFS_ATTR_FORK); |
| 1907 | if (error) |
| 1908 | return(error); |
| 1909 | if (unlikely(bp == NULL)) { |
| 1910 | XFS_ERROR_REPORT("xfs_attr_node_list(2)", |
| 1911 | XFS_ERRLEVEL_LOW, |
| 1912 | context->dp->i_mount); |
| 1913 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1914 | } |
| 1915 | node = bp->data; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1916 | if (be16_to_cpu(node->hdr.info.magic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | == XFS_ATTR_LEAF_MAGIC) |
| 1918 | break; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1919 | if (unlikely(be16_to_cpu(node->hdr.info.magic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | != XFS_DA_NODE_MAGIC)) { |
| 1921 | XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)", |
| 1922 | XFS_ERRLEVEL_LOW, |
| 1923 | context->dp->i_mount, |
| 1924 | node); |
| 1925 | xfs_da_brelse(NULL, bp); |
| 1926 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1927 | } |
| 1928 | btree = node->btree; |
Nathan Scott | fac80cce | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 1929 | for (i = 0; i < be16_to_cpu(node->hdr.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | btree++, i++) { |
| 1931 | if (cursor->hashval |
Nathan Scott | 403432d | 2006-03-17 17:29:46 +1100 | [diff] [blame] | 1932 | <= be32_to_cpu(btree->hashval)) { |
| 1933 | cursor->blkno = be32_to_cpu(btree->before); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | xfs_attr_trace_l_cb("descending", |
| 1935 | context, btree); |
| 1936 | break; |
| 1937 | } |
| 1938 | } |
Nathan Scott | fac80cce | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 1939 | if (i == be16_to_cpu(node->hdr.count)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | xfs_da_brelse(NULL, bp); |
| 1941 | return(0); |
| 1942 | } |
| 1943 | xfs_da_brelse(NULL, bp); |
| 1944 | } |
| 1945 | } |
| 1946 | ASSERT(bp != NULL); |
| 1947 | |
| 1948 | /* |
| 1949 | * Roll upward through the blocks, processing each leaf block in |
| 1950 | * order. As long as there is space in the result buffer, keep |
| 1951 | * adding the information. |
| 1952 | */ |
| 1953 | for (;;) { |
| 1954 | leaf = bp->data; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1955 | if (unlikely(be16_to_cpu(leaf->hdr.info.magic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | != XFS_ATTR_LEAF_MAGIC)) { |
| 1957 | XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)", |
| 1958 | XFS_ERRLEVEL_LOW, |
| 1959 | context->dp->i_mount, leaf); |
| 1960 | xfs_da_brelse(NULL, bp); |
| 1961 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1962 | } |
| 1963 | error = xfs_attr_leaf_list_int(bp, context); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1964 | if (error) { |
| 1965 | xfs_da_brelse(NULL, bp); |
| 1966 | return error; |
| 1967 | } |
| 1968 | if (context->seen_enough || leaf->hdr.info.forw == 0) |
| 1969 | break; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1970 | cursor->blkno = be32_to_cpu(leaf->hdr.info.forw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | xfs_da_brelse(NULL, bp); |
| 1972 | error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, |
| 1973 | &bp, XFS_ATTR_FORK); |
| 1974 | if (error) |
| 1975 | return(error); |
| 1976 | if (unlikely((bp == NULL))) { |
| 1977 | XFS_ERROR_REPORT("xfs_attr_node_list(5)", |
| 1978 | XFS_ERRLEVEL_LOW, |
| 1979 | context->dp->i_mount); |
| 1980 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1981 | } |
| 1982 | } |
| 1983 | xfs_da_brelse(NULL, bp); |
| 1984 | return(0); |
| 1985 | } |
| 1986 | |
| 1987 | |
| 1988 | /*======================================================================== |
| 1989 | * External routines for manipulating out-of-line attribute values. |
| 1990 | *========================================================================*/ |
| 1991 | |
| 1992 | /* |
| 1993 | * Read the value associated with an attribute from the out-of-line buffer |
| 1994 | * that we stored it in. |
| 1995 | */ |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1996 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | xfs_attr_rmtval_get(xfs_da_args_t *args) |
| 1998 | { |
| 1999 | xfs_bmbt_irec_t map[ATTR_RMTVALUE_MAPSIZE]; |
| 2000 | xfs_mount_t *mp; |
| 2001 | xfs_daddr_t dblkno; |
| 2002 | xfs_caddr_t dst; |
| 2003 | xfs_buf_t *bp; |
| 2004 | int nmap, error, tmp, valuelen, blkcnt, i; |
| 2005 | xfs_dablk_t lblkno; |
| 2006 | |
| 2007 | ASSERT(!(args->flags & ATTR_KERNOVAL)); |
| 2008 | |
| 2009 | mp = args->dp->i_mount; |
| 2010 | dst = args->value; |
| 2011 | valuelen = args->valuelen; |
| 2012 | lblkno = args->rmtblkno; |
| 2013 | while (valuelen > 0) { |
| 2014 | nmap = ATTR_RMTVALUE_MAPSIZE; |
| 2015 | error = xfs_bmapi(args->trans, args->dp, (xfs_fileoff_t)lblkno, |
| 2016 | args->rmtblkcnt, |
| 2017 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2018 | NULL, 0, map, &nmap, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | if (error) |
| 2020 | return(error); |
| 2021 | ASSERT(nmap >= 1); |
| 2022 | |
| 2023 | for (i = 0; (i < nmap) && (valuelen > 0); i++) { |
| 2024 | ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && |
| 2025 | (map[i].br_startblock != HOLESTARTBLOCK)); |
| 2026 | dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); |
| 2027 | blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
| 2028 | error = xfs_read_buf(mp, mp->m_ddev_targp, dblkno, |
| 2029 | blkcnt, XFS_BUF_LOCK, &bp); |
| 2030 | if (error) |
| 2031 | return(error); |
| 2032 | |
| 2033 | tmp = (valuelen < XFS_BUF_SIZE(bp)) |
| 2034 | ? valuelen : XFS_BUF_SIZE(bp); |
| 2035 | xfs_biomove(bp, 0, tmp, dst, XFS_B_READ); |
| 2036 | xfs_buf_relse(bp); |
| 2037 | dst += tmp; |
| 2038 | valuelen -= tmp; |
| 2039 | |
| 2040 | lblkno += map[i].br_blockcount; |
| 2041 | } |
| 2042 | } |
| 2043 | ASSERT(valuelen == 0); |
| 2044 | return(0); |
| 2045 | } |
| 2046 | |
| 2047 | /* |
| 2048 | * Write the value associated with an attribute into the out-of-line buffer |
| 2049 | * that we have defined for it. |
| 2050 | */ |
| 2051 | STATIC int |
| 2052 | xfs_attr_rmtval_set(xfs_da_args_t *args) |
| 2053 | { |
| 2054 | xfs_mount_t *mp; |
| 2055 | xfs_fileoff_t lfileoff; |
| 2056 | xfs_inode_t *dp; |
| 2057 | xfs_bmbt_irec_t map; |
| 2058 | xfs_daddr_t dblkno; |
| 2059 | xfs_caddr_t src; |
| 2060 | xfs_buf_t *bp; |
| 2061 | xfs_dablk_t lblkno; |
| 2062 | int blkcnt, valuelen, nmap, error, tmp, committed; |
| 2063 | |
| 2064 | dp = args->dp; |
| 2065 | mp = dp->i_mount; |
| 2066 | src = args->value; |
| 2067 | |
| 2068 | /* |
| 2069 | * Find a "hole" in the attribute address space large enough for |
| 2070 | * us to drop the new attribute's value into. |
| 2071 | */ |
| 2072 | blkcnt = XFS_B_TO_FSB(mp, args->valuelen); |
| 2073 | lfileoff = 0; |
| 2074 | error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, |
| 2075 | XFS_ATTR_FORK); |
| 2076 | if (error) { |
| 2077 | return(error); |
| 2078 | } |
| 2079 | args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff; |
| 2080 | args->rmtblkcnt = blkcnt; |
| 2081 | |
| 2082 | /* |
| 2083 | * Roll through the "value", allocating blocks on disk as required. |
| 2084 | */ |
| 2085 | while (blkcnt > 0) { |
| 2086 | /* |
| 2087 | * Allocate a single extent, up to the size of the value. |
| 2088 | */ |
| 2089 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 2090 | nmap = 1; |
| 2091 | error = xfs_bmapi(args->trans, dp, (xfs_fileoff_t)lblkno, |
| 2092 | blkcnt, |
| 2093 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA | |
| 2094 | XFS_BMAPI_WRITE, |
| 2095 | args->firstblock, args->total, &map, &nmap, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2096 | args->flist, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | if (!error) { |
| 2098 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 2099 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | } |
| 2101 | if (error) { |
| 2102 | ASSERT(committed); |
| 2103 | args->trans = NULL; |
| 2104 | xfs_bmap_cancel(args->flist); |
| 2105 | return(error); |
| 2106 | } |
| 2107 | |
| 2108 | /* |
| 2109 | * bmap_finish() may have committed the last trans and started |
| 2110 | * a new one. We need the inode to be in all transactions. |
| 2111 | */ |
| 2112 | if (committed) { |
| 2113 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 2114 | xfs_trans_ihold(args->trans, dp); |
| 2115 | } |
| 2116 | |
| 2117 | ASSERT(nmap == 1); |
| 2118 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 2119 | (map.br_startblock != HOLESTARTBLOCK)); |
| 2120 | lblkno += map.br_blockcount; |
| 2121 | blkcnt -= map.br_blockcount; |
| 2122 | |
| 2123 | /* |
| 2124 | * Start the next trans in the chain. |
| 2125 | */ |
| 2126 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 2127 | return (error); |
| 2128 | } |
| 2129 | |
| 2130 | /* |
| 2131 | * Roll through the "value", copying the attribute value to the |
| 2132 | * already-allocated blocks. Blocks are written synchronously |
| 2133 | * so that we can know they are all on disk before we turn off |
| 2134 | * the INCOMPLETE flag. |
| 2135 | */ |
| 2136 | lblkno = args->rmtblkno; |
| 2137 | valuelen = args->valuelen; |
| 2138 | while (valuelen > 0) { |
| 2139 | /* |
| 2140 | * Try to remember where we decided to put the value. |
| 2141 | */ |
| 2142 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 2143 | nmap = 1; |
| 2144 | error = xfs_bmapi(NULL, dp, (xfs_fileoff_t)lblkno, |
| 2145 | args->rmtblkcnt, |
| 2146 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2147 | args->firstblock, 0, &map, &nmap, |
| 2148 | NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | if (error) { |
| 2150 | return(error); |
| 2151 | } |
| 2152 | ASSERT(nmap == 1); |
| 2153 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 2154 | (map.br_startblock != HOLESTARTBLOCK)); |
| 2155 | |
| 2156 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), |
| 2157 | blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
| 2158 | |
| 2159 | bp = xfs_buf_get_flags(mp->m_ddev_targp, dblkno, |
| 2160 | blkcnt, XFS_BUF_LOCK); |
| 2161 | ASSERT(bp); |
| 2162 | ASSERT(!XFS_BUF_GETERROR(bp)); |
| 2163 | |
| 2164 | tmp = (valuelen < XFS_BUF_SIZE(bp)) ? valuelen : |
| 2165 | XFS_BUF_SIZE(bp); |
| 2166 | xfs_biomove(bp, 0, tmp, src, XFS_B_WRITE); |
| 2167 | if (tmp < XFS_BUF_SIZE(bp)) |
| 2168 | xfs_biozero(bp, tmp, XFS_BUF_SIZE(bp) - tmp); |
| 2169 | if ((error = xfs_bwrite(mp, bp))) {/* GROT: NOTE: synchronous write */ |
| 2170 | return (error); |
| 2171 | } |
| 2172 | src += tmp; |
| 2173 | valuelen -= tmp; |
| 2174 | |
| 2175 | lblkno += map.br_blockcount; |
| 2176 | } |
| 2177 | ASSERT(valuelen == 0); |
| 2178 | return(0); |
| 2179 | } |
| 2180 | |
| 2181 | /* |
| 2182 | * Remove the value associated with an attribute by deleting the |
| 2183 | * out-of-line buffer that it is stored on. |
| 2184 | */ |
| 2185 | STATIC int |
| 2186 | xfs_attr_rmtval_remove(xfs_da_args_t *args) |
| 2187 | { |
| 2188 | xfs_mount_t *mp; |
| 2189 | xfs_bmbt_irec_t map; |
| 2190 | xfs_buf_t *bp; |
| 2191 | xfs_daddr_t dblkno; |
| 2192 | xfs_dablk_t lblkno; |
| 2193 | int valuelen, blkcnt, nmap, error, done, committed; |
| 2194 | |
| 2195 | mp = args->dp->i_mount; |
| 2196 | |
| 2197 | /* |
| 2198 | * Roll through the "value", invalidating the attribute value's |
| 2199 | * blocks. |
| 2200 | */ |
| 2201 | lblkno = args->rmtblkno; |
| 2202 | valuelen = args->rmtblkcnt; |
| 2203 | while (valuelen > 0) { |
| 2204 | /* |
| 2205 | * Try to remember where we decided to put the value. |
| 2206 | */ |
| 2207 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 2208 | nmap = 1; |
| 2209 | error = xfs_bmapi(NULL, args->dp, (xfs_fileoff_t)lblkno, |
| 2210 | args->rmtblkcnt, |
| 2211 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
| 2212 | args->firstblock, 0, &map, &nmap, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2213 | args->flist, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | if (error) { |
| 2215 | return(error); |
| 2216 | } |
| 2217 | ASSERT(nmap == 1); |
| 2218 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 2219 | (map.br_startblock != HOLESTARTBLOCK)); |
| 2220 | |
| 2221 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), |
| 2222 | blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
| 2223 | |
| 2224 | /* |
| 2225 | * If the "remote" value is in the cache, remove it. |
| 2226 | */ |
| 2227 | bp = xfs_incore(mp->m_ddev_targp, dblkno, blkcnt, |
| 2228 | XFS_INCORE_TRYLOCK); |
| 2229 | if (bp) { |
| 2230 | XFS_BUF_STALE(bp); |
| 2231 | XFS_BUF_UNDELAYWRITE(bp); |
| 2232 | xfs_buf_relse(bp); |
| 2233 | bp = NULL; |
| 2234 | } |
| 2235 | |
| 2236 | valuelen -= map.br_blockcount; |
| 2237 | |
| 2238 | lblkno += map.br_blockcount; |
| 2239 | } |
| 2240 | |
| 2241 | /* |
| 2242 | * Keep de-allocating extents until the remote-value region is gone. |
| 2243 | */ |
| 2244 | lblkno = args->rmtblkno; |
| 2245 | blkcnt = args->rmtblkcnt; |
| 2246 | done = 0; |
| 2247 | while (!done) { |
| 2248 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 2249 | error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt, |
| 2250 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2251 | 1, args->firstblock, args->flist, |
| 2252 | NULL, &done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | if (!error) { |
| 2254 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 2255 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | } |
| 2257 | if (error) { |
| 2258 | ASSERT(committed); |
| 2259 | args->trans = NULL; |
| 2260 | xfs_bmap_cancel(args->flist); |
| 2261 | return(error); |
| 2262 | } |
| 2263 | |
| 2264 | /* |
| 2265 | * bmap_finish() may have committed the last trans and started |
| 2266 | * a new one. We need the inode to be in all transactions. |
| 2267 | */ |
| 2268 | if (committed) { |
| 2269 | xfs_trans_ijoin(args->trans, args->dp, XFS_ILOCK_EXCL); |
| 2270 | xfs_trans_ihold(args->trans, args->dp); |
| 2271 | } |
| 2272 | |
| 2273 | /* |
| 2274 | * Close out trans and start the next one in the chain. |
| 2275 | */ |
| 2276 | if ((error = xfs_attr_rolltrans(&args->trans, args->dp))) |
| 2277 | return (error); |
| 2278 | } |
| 2279 | return(0); |
| 2280 | } |
| 2281 | |
| 2282 | #if defined(XFS_ATTR_TRACE) |
| 2283 | /* |
| 2284 | * Add a trace buffer entry for an attr_list context structure. |
| 2285 | */ |
| 2286 | void |
| 2287 | xfs_attr_trace_l_c(char *where, struct xfs_attr_list_context *context) |
| 2288 | { |
| 2289 | xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_C, where, |
| 2290 | (__psunsigned_t)context->dp, |
| 2291 | (__psunsigned_t)context->cursor->hashval, |
| 2292 | (__psunsigned_t)context->cursor->blkno, |
| 2293 | (__psunsigned_t)context->cursor->offset, |
| 2294 | (__psunsigned_t)context->alist, |
| 2295 | (__psunsigned_t)context->bufsize, |
| 2296 | (__psunsigned_t)context->count, |
| 2297 | (__psunsigned_t)context->firstu, |
| 2298 | (__psunsigned_t) |
| 2299 | ((context->count > 0) && |
| 2300 | !(context->flags & (ATTR_KERNAMELS|ATTR_KERNOVAL))) |
| 2301 | ? (ATTR_ENTRY(context->alist, |
| 2302 | context->count-1)->a_valuelen) |
| 2303 | : 0, |
| 2304 | (__psunsigned_t)context->dupcnt, |
| 2305 | (__psunsigned_t)context->flags, |
| 2306 | (__psunsigned_t)NULL, |
| 2307 | (__psunsigned_t)NULL, |
| 2308 | (__psunsigned_t)NULL); |
| 2309 | } |
| 2310 | |
| 2311 | /* |
| 2312 | * Add a trace buffer entry for a context structure and a Btree node. |
| 2313 | */ |
| 2314 | void |
| 2315 | xfs_attr_trace_l_cn(char *where, struct xfs_attr_list_context *context, |
| 2316 | struct xfs_da_intnode *node) |
| 2317 | { |
| 2318 | xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CN, where, |
| 2319 | (__psunsigned_t)context->dp, |
| 2320 | (__psunsigned_t)context->cursor->hashval, |
| 2321 | (__psunsigned_t)context->cursor->blkno, |
| 2322 | (__psunsigned_t)context->cursor->offset, |
| 2323 | (__psunsigned_t)context->alist, |
| 2324 | (__psunsigned_t)context->bufsize, |
| 2325 | (__psunsigned_t)context->count, |
| 2326 | (__psunsigned_t)context->firstu, |
| 2327 | (__psunsigned_t) |
| 2328 | ((context->count > 0) && |
| 2329 | !(context->flags & (ATTR_KERNAMELS|ATTR_KERNOVAL))) |
| 2330 | ? (ATTR_ENTRY(context->alist, |
| 2331 | context->count-1)->a_valuelen) |
| 2332 | : 0, |
| 2333 | (__psunsigned_t)context->dupcnt, |
| 2334 | (__psunsigned_t)context->flags, |
Nathan Scott | fac80cce | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 2335 | (__psunsigned_t)be16_to_cpu(node->hdr.count), |
Nathan Scott | 403432d | 2006-03-17 17:29:46 +1100 | [diff] [blame] | 2336 | (__psunsigned_t)be32_to_cpu(node->btree[0].hashval), |
Nathan Scott | fac80cce | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 2337 | (__psunsigned_t)be32_to_cpu(node->btree[ |
| 2338 | be16_to_cpu(node->hdr.count)-1].hashval)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | } |
| 2340 | |
| 2341 | /* |
| 2342 | * Add a trace buffer entry for a context structure and a Btree element. |
| 2343 | */ |
| 2344 | void |
| 2345 | xfs_attr_trace_l_cb(char *where, struct xfs_attr_list_context *context, |
| 2346 | struct xfs_da_node_entry *btree) |
| 2347 | { |
| 2348 | xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CB, where, |
| 2349 | (__psunsigned_t)context->dp, |
| 2350 | (__psunsigned_t)context->cursor->hashval, |
| 2351 | (__psunsigned_t)context->cursor->blkno, |
| 2352 | (__psunsigned_t)context->cursor->offset, |
| 2353 | (__psunsigned_t)context->alist, |
| 2354 | (__psunsigned_t)context->bufsize, |
| 2355 | (__psunsigned_t)context->count, |
| 2356 | (__psunsigned_t)context->firstu, |
| 2357 | (__psunsigned_t) |
| 2358 | ((context->count > 0) && |
| 2359 | !(context->flags & (ATTR_KERNAMELS|ATTR_KERNOVAL))) |
| 2360 | ? (ATTR_ENTRY(context->alist, |
| 2361 | context->count-1)->a_valuelen) |
| 2362 | : 0, |
| 2363 | (__psunsigned_t)context->dupcnt, |
| 2364 | (__psunsigned_t)context->flags, |
Nathan Scott | 403432d | 2006-03-17 17:29:46 +1100 | [diff] [blame] | 2365 | (__psunsigned_t)be32_to_cpu(btree->hashval), |
| 2366 | (__psunsigned_t)be32_to_cpu(btree->before), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | (__psunsigned_t)NULL); |
| 2368 | } |
| 2369 | |
| 2370 | /* |
| 2371 | * Add a trace buffer entry for a context structure and a leaf block. |
| 2372 | */ |
| 2373 | void |
| 2374 | xfs_attr_trace_l_cl(char *where, struct xfs_attr_list_context *context, |
| 2375 | struct xfs_attr_leafblock *leaf) |
| 2376 | { |
| 2377 | xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CL, where, |
| 2378 | (__psunsigned_t)context->dp, |
| 2379 | (__psunsigned_t)context->cursor->hashval, |
| 2380 | (__psunsigned_t)context->cursor->blkno, |
| 2381 | (__psunsigned_t)context->cursor->offset, |
| 2382 | (__psunsigned_t)context->alist, |
| 2383 | (__psunsigned_t)context->bufsize, |
| 2384 | (__psunsigned_t)context->count, |
| 2385 | (__psunsigned_t)context->firstu, |
| 2386 | (__psunsigned_t) |
| 2387 | ((context->count > 0) && |
| 2388 | !(context->flags & (ATTR_KERNAMELS|ATTR_KERNOVAL))) |
| 2389 | ? (ATTR_ENTRY(context->alist, |
| 2390 | context->count-1)->a_valuelen) |
| 2391 | : 0, |
| 2392 | (__psunsigned_t)context->dupcnt, |
| 2393 | (__psunsigned_t)context->flags, |
Nathan Scott | 918ae42 | 2006-03-17 17:28:54 +1100 | [diff] [blame] | 2394 | (__psunsigned_t)be16_to_cpu(leaf->hdr.count), |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 2395 | (__psunsigned_t)be32_to_cpu(leaf->entries[0].hashval), |
| 2396 | (__psunsigned_t)be32_to_cpu(leaf->entries[ |
| 2397 | be16_to_cpu(leaf->hdr.count)-1].hashval)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2398 | } |
| 2399 | |
| 2400 | /* |
| 2401 | * Add a trace buffer entry for the arguments given to the routine, |
| 2402 | * generic form. |
| 2403 | */ |
| 2404 | void |
| 2405 | xfs_attr_trace_enter(int type, char *where, |
| 2406 | __psunsigned_t a2, __psunsigned_t a3, |
| 2407 | __psunsigned_t a4, __psunsigned_t a5, |
| 2408 | __psunsigned_t a6, __psunsigned_t a7, |
| 2409 | __psunsigned_t a8, __psunsigned_t a9, |
| 2410 | __psunsigned_t a10, __psunsigned_t a11, |
| 2411 | __psunsigned_t a12, __psunsigned_t a13, |
| 2412 | __psunsigned_t a14, __psunsigned_t a15) |
| 2413 | { |
| 2414 | ASSERT(xfs_attr_trace_buf); |
| 2415 | ktrace_enter(xfs_attr_trace_buf, (void *)((__psunsigned_t)type), |
| 2416 | (void *)where, |
| 2417 | (void *)a2, (void *)a3, (void *)a4, |
| 2418 | (void *)a5, (void *)a6, (void *)a7, |
| 2419 | (void *)a8, (void *)a9, (void *)a10, |
| 2420 | (void *)a11, (void *)a12, (void *)a13, |
| 2421 | (void *)a14, (void *)a15); |
| 2422 | } |
| 2423 | #endif /* XFS_ATTR_TRACE */ |
| 2424 | |
| 2425 | |
| 2426 | /*======================================================================== |
| 2427 | * System (pseudo) namespace attribute interface routines. |
| 2428 | *========================================================================*/ |
| 2429 | |
| 2430 | STATIC int |
| 2431 | posix_acl_access_set( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2432 | bhv_vnode_t *vp, char *name, void *data, size_t size, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2433 | { |
| 2434 | return xfs_acl_vset(vp, data, size, _ACL_TYPE_ACCESS); |
| 2435 | } |
| 2436 | |
| 2437 | STATIC int |
| 2438 | posix_acl_access_remove( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2439 | bhv_vnode_t *vp, char *name, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2440 | { |
| 2441 | return xfs_acl_vremove(vp, _ACL_TYPE_ACCESS); |
| 2442 | } |
| 2443 | |
| 2444 | STATIC int |
| 2445 | posix_acl_access_get( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2446 | bhv_vnode_t *vp, char *name, void *data, size_t size, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | { |
| 2448 | return xfs_acl_vget(vp, data, size, _ACL_TYPE_ACCESS); |
| 2449 | } |
| 2450 | |
| 2451 | STATIC int |
| 2452 | posix_acl_access_exists( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2453 | bhv_vnode_t *vp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2454 | { |
| 2455 | return xfs_acl_vhasacl_access(vp); |
| 2456 | } |
| 2457 | |
| 2458 | STATIC int |
| 2459 | posix_acl_default_set( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2460 | bhv_vnode_t *vp, char *name, void *data, size_t size, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | { |
| 2462 | return xfs_acl_vset(vp, data, size, _ACL_TYPE_DEFAULT); |
| 2463 | } |
| 2464 | |
| 2465 | STATIC int |
| 2466 | posix_acl_default_get( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2467 | bhv_vnode_t *vp, char *name, void *data, size_t size, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | { |
| 2469 | return xfs_acl_vget(vp, data, size, _ACL_TYPE_DEFAULT); |
| 2470 | } |
| 2471 | |
| 2472 | STATIC int |
| 2473 | posix_acl_default_remove( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2474 | bhv_vnode_t *vp, char *name, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | { |
| 2476 | return xfs_acl_vremove(vp, _ACL_TYPE_DEFAULT); |
| 2477 | } |
| 2478 | |
| 2479 | STATIC int |
| 2480 | posix_acl_default_exists( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2481 | bhv_vnode_t *vp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | { |
| 2483 | return xfs_acl_vhasacl_default(vp); |
| 2484 | } |
| 2485 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 2486 | static struct attrnames posix_acl_access = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | .attr_name = "posix_acl_access", |
| 2488 | .attr_namelen = sizeof("posix_acl_access") - 1, |
| 2489 | .attr_get = posix_acl_access_get, |
| 2490 | .attr_set = posix_acl_access_set, |
| 2491 | .attr_remove = posix_acl_access_remove, |
| 2492 | .attr_exists = posix_acl_access_exists, |
| 2493 | }; |
| 2494 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 2495 | static struct attrnames posix_acl_default = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2496 | .attr_name = "posix_acl_default", |
| 2497 | .attr_namelen = sizeof("posix_acl_default") - 1, |
| 2498 | .attr_get = posix_acl_default_get, |
| 2499 | .attr_set = posix_acl_default_set, |
| 2500 | .attr_remove = posix_acl_default_remove, |
| 2501 | .attr_exists = posix_acl_default_exists, |
| 2502 | }; |
| 2503 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 2504 | static struct attrnames *attr_system_names[] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | { &posix_acl_access, &posix_acl_default }; |
| 2506 | |
| 2507 | |
| 2508 | /*======================================================================== |
| 2509 | * Namespace-prefix-style attribute name interface routines. |
| 2510 | *========================================================================*/ |
| 2511 | |
| 2512 | STATIC int |
| 2513 | attr_generic_set( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2514 | bhv_vnode_t *vp, char *name, void *data, size_t size, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 2516 | return -xfs_attr_set(xfs_vtoi(vp), name, data, size, xflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2517 | } |
| 2518 | |
| 2519 | STATIC int |
| 2520 | attr_generic_get( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2521 | bhv_vnode_t *vp, char *name, void *data, size_t size, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | { |
| 2523 | int error, asize = size; |
| 2524 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 2525 | error = xfs_attr_get(xfs_vtoi(vp), name, data, |
| 2526 | &asize, xflags, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | if (!error) |
| 2528 | return asize; |
| 2529 | return -error; |
| 2530 | } |
| 2531 | |
| 2532 | STATIC int |
| 2533 | attr_generic_remove( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2534 | bhv_vnode_t *vp, char *name, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 2536 | return -xfs_attr_remove(xfs_vtoi(vp), name, xflags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | } |
| 2538 | |
| 2539 | STATIC int |
| 2540 | attr_generic_listadd( |
| 2541 | attrnames_t *prefix, |
| 2542 | attrnames_t *namesp, |
| 2543 | void *data, |
| 2544 | size_t size, |
| 2545 | ssize_t *result) |
| 2546 | { |
| 2547 | char *p = data + *result; |
| 2548 | |
| 2549 | *result += prefix->attr_namelen; |
| 2550 | *result += namesp->attr_namelen + 1; |
| 2551 | if (!size) |
| 2552 | return 0; |
| 2553 | if (*result > size) |
| 2554 | return -ERANGE; |
| 2555 | strcpy(p, prefix->attr_name); |
| 2556 | p += prefix->attr_namelen; |
| 2557 | strcpy(p, namesp->attr_name); |
| 2558 | p += namesp->attr_namelen + 1; |
| 2559 | return 0; |
| 2560 | } |
| 2561 | |
| 2562 | STATIC int |
| 2563 | attr_system_list( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2564 | bhv_vnode_t *vp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | void *data, |
| 2566 | size_t size, |
| 2567 | ssize_t *result) |
| 2568 | { |
| 2569 | attrnames_t *namesp; |
| 2570 | int i, error = 0; |
| 2571 | |
| 2572 | for (i = 0; i < ATTR_SYSCOUNT; i++) { |
| 2573 | namesp = attr_system_names[i]; |
| 2574 | if (!namesp->attr_exists || !namesp->attr_exists(vp)) |
| 2575 | continue; |
| 2576 | error = attr_generic_listadd(&attr_system, namesp, |
| 2577 | data, size, result); |
| 2578 | if (error) |
| 2579 | break; |
| 2580 | } |
| 2581 | return error; |
| 2582 | } |
| 2583 | |
| 2584 | int |
| 2585 | attr_generic_list( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2586 | bhv_vnode_t *vp, void *data, size_t size, int xflags, ssize_t *result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | { |
| 2588 | attrlist_cursor_kern_t cursor = { 0 }; |
| 2589 | int error; |
| 2590 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 2591 | error = xfs_attr_list(xfs_vtoi(vp), data, size, xflags, &cursor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | if (error > 0) |
| 2593 | return -error; |
| 2594 | *result = -error; |
| 2595 | return attr_system_list(vp, data, size, result); |
| 2596 | } |
| 2597 | |
| 2598 | attrnames_t * |
| 2599 | attr_lookup_namespace( |
| 2600 | char *name, |
| 2601 | struct attrnames **names, |
| 2602 | int nnames) |
| 2603 | { |
| 2604 | int i; |
| 2605 | |
| 2606 | for (i = 0; i < nnames; i++) |
| 2607 | if (!strncmp(name, names[i]->attr_name, names[i]->attr_namelen)) |
| 2608 | return names[i]; |
| 2609 | return NULL; |
| 2610 | } |
| 2611 | |
| 2612 | /* |
| 2613 | * Some checks to prevent people abusing EAs to get over quota: |
| 2614 | * - Don't allow modifying user EAs on devices/symlinks; |
| 2615 | * - Don't allow modifying user EAs if sticky bit set; |
| 2616 | */ |
| 2617 | STATIC int |
| 2618 | attr_user_capable( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2619 | bhv_vnode_t *vp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | cred_t *cred) |
| 2621 | { |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 2622 | struct inode *inode = vn_to_inode(vp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2623 | |
| 2624 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 2625 | return -EPERM; |
| 2626 | if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode) && |
| 2627 | !capable(CAP_SYS_ADMIN)) |
| 2628 | return -EPERM; |
| 2629 | if (S_ISDIR(inode->i_mode) && (inode->i_mode & S_ISVTX) && |
| 2630 | (current_fsuid(cred) != inode->i_uid) && !capable(CAP_FOWNER)) |
| 2631 | return -EPERM; |
| 2632 | return 0; |
| 2633 | } |
| 2634 | |
| 2635 | STATIC int |
| 2636 | attr_trusted_capable( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2637 | bhv_vnode_t *vp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | cred_t *cred) |
| 2639 | { |
Nathan Scott | ec86dc0 | 2006-03-17 17:25:36 +1100 | [diff] [blame] | 2640 | struct inode *inode = vn_to_inode(vp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2641 | |
| 2642 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 2643 | return -EPERM; |
| 2644 | if (!capable(CAP_SYS_ADMIN)) |
| 2645 | return -EPERM; |
| 2646 | return 0; |
| 2647 | } |
| 2648 | |
| 2649 | STATIC int |
| 2650 | attr_secure_capable( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2651 | bhv_vnode_t *vp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2652 | cred_t *cred) |
| 2653 | { |
| 2654 | return -ENOSECURITY; |
| 2655 | } |
| 2656 | |
| 2657 | STATIC int |
| 2658 | attr_system_set( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2659 | bhv_vnode_t *vp, char *name, void *data, size_t size, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | { |
| 2661 | attrnames_t *namesp; |
| 2662 | int error; |
| 2663 | |
| 2664 | if (xflags & ATTR_CREATE) |
| 2665 | return -EINVAL; |
| 2666 | |
| 2667 | namesp = attr_lookup_namespace(name, attr_system_names, ATTR_SYSCOUNT); |
| 2668 | if (!namesp) |
| 2669 | return -EOPNOTSUPP; |
| 2670 | error = namesp->attr_set(vp, name, data, size, xflags); |
| 2671 | if (!error) |
| 2672 | error = vn_revalidate(vp); |
| 2673 | return error; |
| 2674 | } |
| 2675 | |
| 2676 | STATIC int |
| 2677 | attr_system_get( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2678 | bhv_vnode_t *vp, char *name, void *data, size_t size, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2679 | { |
| 2680 | attrnames_t *namesp; |
| 2681 | |
| 2682 | namesp = attr_lookup_namespace(name, attr_system_names, ATTR_SYSCOUNT); |
| 2683 | if (!namesp) |
| 2684 | return -EOPNOTSUPP; |
| 2685 | return namesp->attr_get(vp, name, data, size, xflags); |
| 2686 | } |
| 2687 | |
| 2688 | STATIC int |
| 2689 | attr_system_remove( |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 2690 | bhv_vnode_t *vp, char *name, int xflags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2691 | { |
| 2692 | attrnames_t *namesp; |
| 2693 | |
| 2694 | namesp = attr_lookup_namespace(name, attr_system_names, ATTR_SYSCOUNT); |
| 2695 | if (!namesp) |
| 2696 | return -EOPNOTSUPP; |
| 2697 | return namesp->attr_remove(vp, name, xflags); |
| 2698 | } |
| 2699 | |
| 2700 | struct attrnames attr_system = { |
| 2701 | .attr_name = "system.", |
| 2702 | .attr_namelen = sizeof("system.") - 1, |
| 2703 | .attr_flag = ATTR_SYSTEM, |
| 2704 | .attr_get = attr_system_get, |
| 2705 | .attr_set = attr_system_set, |
| 2706 | .attr_remove = attr_system_remove, |
| 2707 | .attr_capable = (attrcapable_t)fs_noerr, |
| 2708 | }; |
| 2709 | |
| 2710 | struct attrnames attr_trusted = { |
| 2711 | .attr_name = "trusted.", |
| 2712 | .attr_namelen = sizeof("trusted.") - 1, |
| 2713 | .attr_flag = ATTR_ROOT, |
| 2714 | .attr_get = attr_generic_get, |
| 2715 | .attr_set = attr_generic_set, |
| 2716 | .attr_remove = attr_generic_remove, |
| 2717 | .attr_capable = attr_trusted_capable, |
| 2718 | }; |
| 2719 | |
| 2720 | struct attrnames attr_secure = { |
| 2721 | .attr_name = "security.", |
| 2722 | .attr_namelen = sizeof("security.") - 1, |
| 2723 | .attr_flag = ATTR_SECURE, |
| 2724 | .attr_get = attr_generic_get, |
| 2725 | .attr_set = attr_generic_set, |
| 2726 | .attr_remove = attr_generic_remove, |
| 2727 | .attr_capable = attr_secure_capable, |
| 2728 | }; |
| 2729 | |
| 2730 | struct attrnames attr_user = { |
| 2731 | .attr_name = "user.", |
| 2732 | .attr_namelen = sizeof("user.") - 1, |
| 2733 | .attr_get = attr_generic_get, |
| 2734 | .attr_set = attr_generic_set, |
| 2735 | .attr_remove = attr_generic_remove, |
| 2736 | .attr_capable = attr_user_capable, |
| 2737 | }; |
| 2738 | |
| 2739 | struct attrnames *attr_namespaces[] = |
| 2740 | { &attr_system, &attr_trusted, &attr_secure, &attr_user }; |