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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 20 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 22 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 24 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_trans.h" |
| 26 | #include "xfs_sb.h" |
| 27 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "xfs_dir2.h" |
| 29 | #include "xfs_dmapi.h" |
| 30 | #include "xfs_mount.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 31 | #include "xfs_da_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 33 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include "xfs_ialloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_dir2_sf.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 36 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_dinode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 39 | #include "xfs_alloc.h" |
| 40 | #include "xfs_btree.h" |
| 41 | #include "xfs_inode_item.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include "xfs_attr.h" |
| 44 | #include "xfs_attr_leaf.h" |
| 45 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include "xfs_quota.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include "xfs_trans_space.h" |
| 48 | #include "xfs_acl.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 49 | #include "xfs_rw.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 50 | #include "xfs_vnodeops.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | /* |
| 53 | * xfs_attr.c |
| 54 | * |
| 55 | * Provide the external interfaces to manage attribute lists. |
| 56 | */ |
| 57 | |
| 58 | /*======================================================================== |
| 59 | * Function prototypes for the kernel. |
| 60 | *========================================================================*/ |
| 61 | |
| 62 | /* |
| 63 | * Internal routines when attribute list fits inside the inode. |
| 64 | */ |
| 65 | STATIC int xfs_attr_shortform_addname(xfs_da_args_t *args); |
| 66 | |
| 67 | /* |
| 68 | * Internal routines when attribute list is one block. |
| 69 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 70 | STATIC int xfs_attr_leaf_get(xfs_da_args_t *args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | STATIC int xfs_attr_leaf_addname(xfs_da_args_t *args); |
| 72 | STATIC int xfs_attr_leaf_removename(xfs_da_args_t *args); |
| 73 | STATIC int xfs_attr_leaf_list(xfs_attr_list_context_t *context); |
| 74 | |
| 75 | /* |
| 76 | * Internal routines when attribute list is more than one block. |
| 77 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 78 | STATIC int xfs_attr_node_get(xfs_da_args_t *args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | STATIC int xfs_attr_node_addname(xfs_da_args_t *args); |
| 80 | STATIC int xfs_attr_node_removename(xfs_da_args_t *args); |
| 81 | STATIC int xfs_attr_node_list(xfs_attr_list_context_t *context); |
| 82 | STATIC int xfs_attr_fillstate(xfs_da_state_t *state); |
| 83 | STATIC int xfs_attr_refillstate(xfs_da_state_t *state); |
| 84 | |
| 85 | /* |
| 86 | * Routines to manipulate out-of-line attribute values. |
| 87 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | STATIC int xfs_attr_rmtval_set(xfs_da_args_t *args); |
| 89 | STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args); |
| 90 | |
| 91 | #define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */ |
| 92 | |
| 93 | #if defined(XFS_ATTR_TRACE) |
| 94 | ktrace_t *xfs_attr_trace_buf; |
| 95 | #endif |
| 96 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 97 | STATIC int |
| 98 | xfs_attr_name_to_xname( |
| 99 | struct xfs_name *xname, |
| 100 | const char *aname) |
| 101 | { |
| 102 | if (!aname) |
| 103 | return EINVAL; |
| 104 | xname->name = aname; |
| 105 | xname->len = strlen(aname); |
| 106 | if (xname->len >= MAXNAMELEN) |
| 107 | return EFAULT; /* match IRIX behaviour */ |
| 108 | |
| 109 | return 0; |
| 110 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 112 | STATIC int |
| 113 | xfs_inode_hasattr( |
| 114 | struct xfs_inode *ip) |
| 115 | { |
| 116 | if (!XFS_IFORK_Q(ip) || |
| 117 | (ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && |
| 118 | ip->i_d.di_anextents == 0)) |
| 119 | return 0; |
| 120 | return 1; |
| 121 | } |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | /*======================================================================== |
| 124 | * Overall external interface routines. |
| 125 | *========================================================================*/ |
| 126 | |
| 127 | int |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 128 | xfs_attr_fetch(xfs_inode_t *ip, struct xfs_name *name, |
| 129 | char *value, int *valuelenp, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | { |
| 131 | xfs_da_args_t args; |
| 132 | int error; |
| 133 | |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 134 | if (!xfs_inode_hasattr(ip)) |
| 135 | return ENOATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | /* |
| 138 | * Fill in the arg structure for this request. |
| 139 | */ |
| 140 | memset((char *)&args, 0, sizeof(args)); |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 141 | args.name = name->name; |
| 142 | args.namelen = name->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | args.value = value; |
| 144 | args.valuelen = *valuelenp; |
| 145 | args.flags = flags; |
| 146 | args.hashval = xfs_da_hashname(args.name, args.namelen); |
| 147 | args.dp = ip; |
| 148 | args.whichfork = XFS_ATTR_FORK; |
| 149 | |
| 150 | /* |
| 151 | * Decide on what work routines to call based on the inode size. |
| 152 | */ |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 153 | if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | error = xfs_attr_shortform_getvalue(&args); |
| 155 | } else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK)) { |
| 156 | error = xfs_attr_leaf_get(&args); |
| 157 | } else { |
| 158 | error = xfs_attr_node_get(&args); |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * Return the number of bytes in the value to the caller. |
| 163 | */ |
| 164 | *valuelenp = args.valuelen; |
| 165 | |
| 166 | if (error == EEXIST) |
| 167 | error = 0; |
| 168 | return(error); |
| 169 | } |
| 170 | |
| 171 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 172 | xfs_attr_get( |
| 173 | xfs_inode_t *ip, |
| 174 | const char *name, |
| 175 | char *value, |
| 176 | int *valuelenp, |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 177 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 179 | int error; |
| 180 | struct xfs_name xname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
| 182 | XFS_STATS_INC(xs_attr_get); |
| 183 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| 185 | return(EIO); |
| 186 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 187 | error = xfs_attr_name_to_xname(&xname, name); |
| 188 | if (error) |
| 189 | return error; |
| 190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 192 | error = xfs_attr_fetch(ip, &xname, value, valuelenp, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 194 | return(error); |
| 195 | } |
| 196 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 197 | STATIC int |
| 198 | xfs_attr_set_int(xfs_inode_t *dp, struct xfs_name *name, |
| 199 | char *value, int valuelen, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | { |
| 201 | xfs_da_args_t args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | xfs_fsblock_t firstblock; |
| 203 | xfs_bmap_free_t flist; |
| 204 | int error, err2, committed; |
| 205 | int local, size; |
| 206 | uint nblks; |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 207 | xfs_mount_t *mp = dp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | int rsvd = (flags & ATTR_ROOT) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
| 210 | /* |
| 211 | * Attach the dquots to the inode. |
| 212 | */ |
| 213 | if ((error = XFS_QM_DQATTACH(mp, dp, 0))) |
| 214 | return (error); |
| 215 | |
| 216 | /* |
| 217 | * If the inode doesn't have an attribute fork, add one. |
| 218 | * (inode must not be locked when we call this routine) |
| 219 | */ |
| 220 | if (XFS_IFORK_Q(dp) == 0) { |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 221 | int sf_size = sizeof(xfs_attr_sf_hdr_t) + |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 222 | XFS_ATTR_SF_ENTSIZE_BYNAME(name->len, valuelen); |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 223 | |
| 224 | if ((error = xfs_bmap_add_attrfork(dp, sf_size, rsvd))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | return(error); |
| 226 | } |
| 227 | |
| 228 | /* |
| 229 | * Fill in the arg structure for this request. |
| 230 | */ |
| 231 | memset((char *)&args, 0, sizeof(args)); |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 232 | args.name = name->name; |
| 233 | args.namelen = name->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | args.value = value; |
| 235 | args.valuelen = valuelen; |
| 236 | args.flags = flags; |
| 237 | args.hashval = xfs_da_hashname(args.name, args.namelen); |
| 238 | args.dp = dp; |
| 239 | args.firstblock = &firstblock; |
| 240 | args.flist = &flist; |
| 241 | args.whichfork = XFS_ATTR_FORK; |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 242 | args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 244 | /* |
| 245 | * Determine space new attribute will use, and if it would be |
| 246 | * "local" or "remote" (note: local != inline). |
| 247 | */ |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 248 | size = xfs_attr_leaf_newentsize(name->len, valuelen, |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 249 | mp->m_sb.sb_blocksize, &local); |
| 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK); |
| 252 | if (local) { |
| 253 | if (size > (mp->m_sb.sb_blocksize >> 1)) { |
| 254 | /* Double split possible */ |
| 255 | nblks <<= 1; |
| 256 | } |
| 257 | } else { |
| 258 | uint dblocks = XFS_B_TO_FSB(mp, valuelen); |
| 259 | /* Out of line attribute, cannot double split, but make |
| 260 | * room for the attribute value itself. |
| 261 | */ |
| 262 | nblks += dblocks; |
| 263 | nblks += XFS_NEXTENTADD_SPACE_RES(mp, dblocks, XFS_ATTR_FORK); |
| 264 | } |
| 265 | |
| 266 | /* Size is now blocks for attribute data */ |
| 267 | args.total = nblks; |
| 268 | |
| 269 | /* |
| 270 | * Start our first transaction of the day. |
| 271 | * |
| 272 | * All future transactions during this code must be "chained" off |
| 273 | * this one via the trans_dup() call. All transactions will contain |
| 274 | * the inode, and the inode will always be marked with trans_ihold(). |
| 275 | * Since the inode will be locked in all transactions, we must log |
| 276 | * the inode in every transaction to let it float upward through |
| 277 | * the log. |
| 278 | */ |
| 279 | args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_SET); |
| 280 | |
| 281 | /* |
| 282 | * Root fork attributes can use reserved data blocks for this |
| 283 | * operation if necessary |
| 284 | */ |
| 285 | |
| 286 | if (rsvd) |
| 287 | args.trans->t_flags |= XFS_TRANS_RESERVE; |
| 288 | |
| 289 | if ((error = xfs_trans_reserve(args.trans, (uint) nblks, |
| 290 | XFS_ATTRSET_LOG_RES(mp, nblks), |
| 291 | 0, XFS_TRANS_PERM_LOG_RES, |
| 292 | XFS_ATTRSET_LOG_COUNT))) { |
| 293 | xfs_trans_cancel(args.trans, 0); |
| 294 | return(error); |
| 295 | } |
| 296 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 297 | |
| 298 | error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, args.trans, dp, nblks, 0, |
| 299 | rsvd ? XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : |
| 300 | XFS_QMOPT_RES_REGBLKS); |
| 301 | if (error) { |
| 302 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 303 | xfs_trans_cancel(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
| 304 | return (error); |
| 305 | } |
| 306 | |
| 307 | xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); |
| 308 | xfs_trans_ihold(args.trans, dp); |
| 309 | |
| 310 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 311 | * If the attribute list is non-existent or a shortform list, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | * upgrade it to a single-leaf-block attribute list. |
| 313 | */ |
| 314 | if ((dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) || |
| 315 | ((dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) && |
| 316 | (dp->i_d.di_anextents == 0))) { |
| 317 | |
| 318 | /* |
| 319 | * Build initial attribute list (if required). |
| 320 | */ |
| 321 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 322 | xfs_attr_shortform_create(&args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | /* |
| 325 | * Try to add the attr to the attribute list in |
| 326 | * the inode. |
| 327 | */ |
| 328 | error = xfs_attr_shortform_addname(&args); |
| 329 | if (error != ENOSPC) { |
| 330 | /* |
| 331 | * Commit the shortform mods, and we're done. |
| 332 | * NOTE: this is also the error path (EEXIST, etc). |
| 333 | */ |
| 334 | ASSERT(args.trans != NULL); |
| 335 | |
| 336 | /* |
| 337 | * If this is a synchronous mount, make sure that |
| 338 | * the transaction goes to disk before returning |
| 339 | * to the user. |
| 340 | */ |
| 341 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 342 | xfs_trans_set_sync(args.trans); |
| 343 | } |
| 344 | err2 = xfs_trans_commit(args.trans, |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 345 | XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 347 | |
| 348 | /* |
| 349 | * Hit the inode change time. |
| 350 | */ |
| 351 | if (!error && (flags & ATTR_KERNOTIME) == 0) { |
| 352 | xfs_ichgtime(dp, XFS_ICHGTIME_CHG); |
| 353 | } |
| 354 | return(error == 0 ? err2 : error); |
| 355 | } |
| 356 | |
| 357 | /* |
| 358 | * It won't fit in the shortform, transform to a leaf block. |
| 359 | * GROT: another possible req'mt for a double-split btree op. |
| 360 | */ |
| 361 | XFS_BMAP_INIT(args.flist, args.firstblock); |
| 362 | error = xfs_attr_shortform_to_leaf(&args); |
| 363 | if (!error) { |
| 364 | error = xfs_bmap_finish(&args.trans, args.flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 365 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | if (error) { |
| 368 | ASSERT(committed); |
| 369 | args.trans = NULL; |
| 370 | xfs_bmap_cancel(&flist); |
| 371 | goto out; |
| 372 | } |
| 373 | |
| 374 | /* |
| 375 | * bmap_finish() may have committed the last trans and started |
| 376 | * a new one. We need the inode to be in all transactions. |
| 377 | */ |
| 378 | if (committed) { |
| 379 | xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); |
| 380 | xfs_trans_ihold(args.trans, dp); |
| 381 | } |
| 382 | |
| 383 | /* |
| 384 | * Commit the leaf transformation. We'll need another (linked) |
| 385 | * transaction to add the new attribute to the leaf. |
| 386 | */ |
| 387 | if ((error = xfs_attr_rolltrans(&args.trans, dp))) |
| 388 | goto out; |
| 389 | |
| 390 | } |
| 391 | |
| 392 | if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 393 | error = xfs_attr_leaf_addname(&args); |
| 394 | } else { |
| 395 | error = xfs_attr_node_addname(&args); |
| 396 | } |
| 397 | if (error) { |
| 398 | goto out; |
| 399 | } |
| 400 | |
| 401 | /* |
| 402 | * If this is a synchronous mount, make sure that the |
| 403 | * transaction goes to disk before returning to the user. |
| 404 | */ |
| 405 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 406 | xfs_trans_set_sync(args.trans); |
| 407 | } |
| 408 | |
| 409 | /* |
| 410 | * Commit the last in the sequence of transactions. |
| 411 | */ |
| 412 | xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 413 | error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 415 | |
| 416 | /* |
| 417 | * Hit the inode change time. |
| 418 | */ |
| 419 | if (!error && (flags & ATTR_KERNOTIME) == 0) { |
| 420 | xfs_ichgtime(dp, XFS_ICHGTIME_CHG); |
| 421 | } |
| 422 | |
| 423 | return(error); |
| 424 | |
| 425 | out: |
| 426 | if (args.trans) |
| 427 | xfs_trans_cancel(args.trans, |
| 428 | XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 429 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 430 | return(error); |
| 431 | } |
| 432 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 433 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 434 | xfs_attr_set( |
| 435 | xfs_inode_t *dp, |
| 436 | const char *name, |
| 437 | char *value, |
| 438 | int valuelen, |
| 439 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | { |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 441 | int error; |
| 442 | struct xfs_name xname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 444 | XFS_STATS_INC(xs_attr_set); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 446 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | return (EIO); |
| 448 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 449 | error = xfs_attr_name_to_xname(&xname, name); |
| 450 | if (error) |
| 451 | return error; |
| 452 | |
| 453 | return xfs_attr_set_int(dp, &xname, value, valuelen, flags); |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 454 | } |
| 455 | |
| 456 | /* |
| 457 | * Generic handler routine to remove a name from an attribute list. |
| 458 | * Transitions attribute list from Btree to shortform as necessary. |
| 459 | */ |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 460 | STATIC int |
| 461 | xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags) |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 462 | { |
| 463 | xfs_da_args_t args; |
| 464 | xfs_fsblock_t firstblock; |
| 465 | xfs_bmap_free_t flist; |
| 466 | int error; |
| 467 | xfs_mount_t *mp = dp->i_mount; |
| 468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | /* |
| 470 | * Fill in the arg structure for this request. |
| 471 | */ |
| 472 | memset((char *)&args, 0, sizeof(args)); |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 473 | args.name = name->name; |
| 474 | args.namelen = name->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | args.flags = flags; |
| 476 | args.hashval = xfs_da_hashname(args.name, args.namelen); |
| 477 | args.dp = dp; |
| 478 | args.firstblock = &firstblock; |
| 479 | args.flist = &flist; |
| 480 | args.total = 0; |
| 481 | args.whichfork = XFS_ATTR_FORK; |
| 482 | |
| 483 | /* |
| 484 | * Attach the dquots to the inode. |
| 485 | */ |
| 486 | if ((error = XFS_QM_DQATTACH(mp, dp, 0))) |
| 487 | return (error); |
| 488 | |
| 489 | /* |
| 490 | * Start our first transaction of the day. |
| 491 | * |
| 492 | * All future transactions during this code must be "chained" off |
| 493 | * this one via the trans_dup() call. All transactions will contain |
| 494 | * the inode, and the inode will always be marked with trans_ihold(). |
| 495 | * Since the inode will be locked in all transactions, we must log |
| 496 | * the inode in every transaction to let it float upward through |
| 497 | * the log. |
| 498 | */ |
| 499 | args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_RM); |
| 500 | |
| 501 | /* |
| 502 | * Root fork attributes can use reserved data blocks for this |
| 503 | * operation if necessary |
| 504 | */ |
| 505 | |
| 506 | if (flags & ATTR_ROOT) |
| 507 | args.trans->t_flags |= XFS_TRANS_RESERVE; |
| 508 | |
| 509 | if ((error = xfs_trans_reserve(args.trans, |
| 510 | XFS_ATTRRM_SPACE_RES(mp), |
| 511 | XFS_ATTRRM_LOG_RES(mp), |
| 512 | 0, XFS_TRANS_PERM_LOG_RES, |
| 513 | XFS_ATTRRM_LOG_COUNT))) { |
| 514 | xfs_trans_cancel(args.trans, 0); |
| 515 | return(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | } |
| 517 | |
| 518 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 519 | /* |
| 520 | * No need to make quota reservations here. We expect to release some |
| 521 | * blocks not allocate in the common case. |
| 522 | */ |
| 523 | xfs_trans_ijoin(args.trans, dp, XFS_ILOCK_EXCL); |
| 524 | xfs_trans_ihold(args.trans, dp); |
| 525 | |
| 526 | /* |
| 527 | * Decide on what work routines to call based on the inode size. |
| 528 | */ |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 529 | if (!xfs_inode_hasattr(dp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | error = XFS_ERROR(ENOATTR); |
| 531 | goto out; |
| 532 | } |
| 533 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
| 534 | ASSERT(dp->i_afp->if_flags & XFS_IFINLINE); |
| 535 | error = xfs_attr_shortform_remove(&args); |
| 536 | if (error) { |
| 537 | goto out; |
| 538 | } |
| 539 | } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 540 | error = xfs_attr_leaf_removename(&args); |
| 541 | } else { |
| 542 | error = xfs_attr_node_removename(&args); |
| 543 | } |
| 544 | if (error) { |
| 545 | goto out; |
| 546 | } |
| 547 | |
| 548 | /* |
| 549 | * If this is a synchronous mount, make sure that the |
| 550 | * transaction goes to disk before returning to the user. |
| 551 | */ |
| 552 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 553 | xfs_trans_set_sync(args.trans); |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * Commit the last in the sequence of transactions. |
| 558 | */ |
| 559 | xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 560 | error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 562 | |
| 563 | /* |
| 564 | * Hit the inode change time. |
| 565 | */ |
| 566 | if (!error && (flags & ATTR_KERNOTIME) == 0) { |
| 567 | xfs_ichgtime(dp, XFS_ICHGTIME_CHG); |
| 568 | } |
| 569 | |
| 570 | return(error); |
| 571 | |
| 572 | out: |
| 573 | if (args.trans) |
| 574 | xfs_trans_cancel(args.trans, |
| 575 | XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 576 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 577 | return(error); |
| 578 | } |
| 579 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 580 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 581 | xfs_attr_remove( |
| 582 | xfs_inode_t *dp, |
| 583 | const char *name, |
| 584 | int flags) |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 585 | { |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 586 | int error; |
| 587 | struct xfs_name xname; |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 588 | |
| 589 | XFS_STATS_INC(xs_attr_remove); |
| 590 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 591 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| 592 | return (EIO); |
| 593 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 594 | error = xfs_attr_name_to_xname(&xname, name); |
| 595 | if (error) |
| 596 | return error; |
| 597 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 598 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 599 | if (!xfs_inode_hasattr(dp)) { |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 600 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 601 | return XFS_ERROR(ENOATTR); |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 602 | } |
| 603 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 604 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 605 | return xfs_attr_remove_int(dp, &xname, flags); |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 606 | } |
| 607 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 608 | int |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 609 | xfs_attr_list_int(xfs_attr_list_context_t *context) |
| 610 | { |
| 611 | int error; |
| 612 | xfs_inode_t *dp = context->dp; |
| 613 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 614 | XFS_STATS_INC(xs_attr_list); |
| 615 | |
| 616 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| 617 | return EIO; |
| 618 | |
| 619 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
| 620 | xfs_attr_trace_l_c("syscall start", context); |
| 621 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 622 | /* |
| 623 | * Decide on what work routines to call based on the inode size. |
| 624 | */ |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 625 | if (!xfs_inode_hasattr(dp)) { |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 626 | error = 0; |
| 627 | } else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
| 628 | error = xfs_attr_shortform_list(context); |
| 629 | } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 630 | error = xfs_attr_leaf_list(context); |
| 631 | } else { |
| 632 | error = xfs_attr_node_list(context); |
| 633 | } |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 634 | |
| 635 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 636 | xfs_attr_trace_l_c("syscall end", context); |
| 637 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 638 | return error; |
| 639 | } |
| 640 | |
| 641 | #define ATTR_ENTBASESIZE /* minimum bytes used by an attr */ \ |
| 642 | (((struct attrlist_ent *) 0)->a_name - (char *) 0) |
| 643 | #define ATTR_ENTSIZE(namelen) /* actual bytes used by an attr */ \ |
| 644 | ((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(u_int32_t)-1) \ |
| 645 | & ~(sizeof(u_int32_t)-1)) |
| 646 | |
| 647 | /* |
| 648 | * Format an attribute and copy it out to the user's buffer. |
| 649 | * Take care to check values and protect against them changing later, |
| 650 | * we may be reading them directly out of a user buffer. |
| 651 | */ |
| 652 | /*ARGSUSED*/ |
| 653 | STATIC int |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 654 | xfs_attr_put_listent(xfs_attr_list_context_t *context, int flags, |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 655 | char *name, int namelen, |
| 656 | int valuelen, char *value) |
| 657 | { |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 658 | struct attrlist *alist = (struct attrlist *)context->alist; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 659 | attrlist_ent_t *aep; |
| 660 | int arraytop; |
| 661 | |
| 662 | ASSERT(!(context->flags & ATTR_KERNOVAL)); |
| 663 | ASSERT(context->count >= 0); |
| 664 | ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 665 | ASSERT(context->firstu >= sizeof(*alist)); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 666 | ASSERT(context->firstu <= context->bufsize); |
| 667 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 668 | /* |
| 669 | * Only list entries in the right namespace. |
| 670 | */ |
| 671 | if (((context->flags & ATTR_SECURE) == 0) != |
| 672 | ((flags & XFS_ATTR_SECURE) == 0)) |
| 673 | return 0; |
| 674 | if (((context->flags & ATTR_ROOT) == 0) != |
| 675 | ((flags & XFS_ATTR_ROOT) == 0)) |
| 676 | return 0; |
| 677 | |
| 678 | arraytop = sizeof(*alist) + |
| 679 | context->count * sizeof(alist->al_offset[0]); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 680 | context->firstu -= ATTR_ENTSIZE(namelen); |
| 681 | if (context->firstu < arraytop) { |
| 682 | xfs_attr_trace_l_c("buffer full", context); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 683 | alist->al_more = 1; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 684 | context->seen_enough = 1; |
| 685 | return 1; |
| 686 | } |
| 687 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 688 | aep = (attrlist_ent_t *)&context->alist[context->firstu]; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 689 | aep->a_valuelen = valuelen; |
| 690 | memcpy(aep->a_name, name, namelen); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 691 | aep->a_name[namelen] = 0; |
| 692 | alist->al_offset[context->count++] = context->firstu; |
| 693 | alist->al_count = context->count; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 694 | xfs_attr_trace_l_c("add", context); |
| 695 | return 0; |
| 696 | } |
| 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | /* |
| 699 | * Generate a list of extended attribute names and optionally |
| 700 | * also value lengths. Positive return value follows the XFS |
| 701 | * convention of being an error, zero or negative return code |
| 702 | * is the length of the buffer returned (negated), indicating |
| 703 | * success. |
| 704 | */ |
| 705 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 706 | xfs_attr_list( |
| 707 | xfs_inode_t *dp, |
| 708 | char *buffer, |
| 709 | int bufsize, |
| 710 | int flags, |
| 711 | attrlist_cursor_kern_t *cursor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | { |
| 713 | xfs_attr_list_context_t context; |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 714 | struct attrlist *alist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | int error; |
| 716 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | /* |
| 718 | * Validate the cursor. |
| 719 | */ |
| 720 | if (cursor->pad1 || cursor->pad2) |
| 721 | return(XFS_ERROR(EINVAL)); |
| 722 | if ((cursor->initted == 0) && |
| 723 | (cursor->hashval || cursor->blkno || cursor->offset)) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 724 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | |
| 726 | /* |
| 727 | * Check for a properly aligned buffer. |
| 728 | */ |
| 729 | if (((long)buffer) & (sizeof(int)-1)) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 730 | return XFS_ERROR(EFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | if (flags & ATTR_KERNOVAL) |
| 732 | bufsize = 0; |
| 733 | |
| 734 | /* |
| 735 | * Initialize the output buffer. |
| 736 | */ |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 737 | memset(&context, 0, sizeof(context)); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 738 | context.dp = dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | context.cursor = cursor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | context.resynch = 1; |
| 741 | context.flags = flags; |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 742 | context.alist = buffer; |
| 743 | context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */ |
| 744 | context.firstu = context.bufsize; |
| 745 | context.put_listent = xfs_attr_put_listent; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 746 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 747 | alist = (struct attrlist *)context.alist; |
| 748 | alist->al_count = 0; |
| 749 | alist->al_more = 0; |
| 750 | alist->al_offset[0] = context.bufsize; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 751 | |
| 752 | error = xfs_attr_list_int(&context); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 753 | ASSERT(error >= 0); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 754 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | } |
| 756 | |
| 757 | int /* error */ |
| 758 | xfs_attr_inactive(xfs_inode_t *dp) |
| 759 | { |
| 760 | xfs_trans_t *trans; |
| 761 | xfs_mount_t *mp; |
| 762 | int error; |
| 763 | |
| 764 | mp = dp->i_mount; |
| 765 | ASSERT(! XFS_NOT_DQATTACHED(mp, dp)); |
| 766 | |
| 767 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 768 | if (!xfs_inode_hasattr(dp) || |
| 769 | dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 771 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | } |
| 773 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 774 | |
| 775 | /* |
| 776 | * Start our first transaction of the day. |
| 777 | * |
| 778 | * All future transactions during this code must be "chained" off |
| 779 | * this one via the trans_dup() call. All transactions will contain |
| 780 | * the inode, and the inode will always be marked with trans_ihold(). |
| 781 | * Since the inode will be locked in all transactions, we must log |
| 782 | * the inode in every transaction to let it float upward through |
| 783 | * the log. |
| 784 | */ |
| 785 | trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL); |
| 786 | if ((error = xfs_trans_reserve(trans, 0, XFS_ATTRINVAL_LOG_RES(mp), 0, |
| 787 | XFS_TRANS_PERM_LOG_RES, |
| 788 | XFS_ATTRINVAL_LOG_COUNT))) { |
| 789 | xfs_trans_cancel(trans, 0); |
| 790 | return(error); |
| 791 | } |
| 792 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 793 | |
| 794 | /* |
| 795 | * No need to make quota reservations here. We expect to release some |
| 796 | * blocks, not allocate, in the common case. |
| 797 | */ |
| 798 | xfs_trans_ijoin(trans, dp, XFS_ILOCK_EXCL); |
| 799 | xfs_trans_ihold(trans, dp); |
| 800 | |
| 801 | /* |
| 802 | * Decide on what work routines to call based on the inode size. |
| 803 | */ |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 804 | if (!xfs_inode_hasattr(dp) || |
| 805 | dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | error = 0; |
| 807 | goto out; |
| 808 | } |
| 809 | error = xfs_attr_root_inactive(&trans, dp); |
| 810 | if (error) |
| 811 | goto out; |
| 812 | /* |
| 813 | * signal synchronous inactive transactions unless this |
| 814 | * is a synchronous mount filesystem in which case we |
| 815 | * know that we're here because we've been called out of |
| 816 | * xfs_inactive which means that the last reference is gone |
| 817 | * and the unlink transaction has already hit the disk so |
| 818 | * async inactive transactions are safe. |
| 819 | */ |
| 820 | if ((error = xfs_itruncate_finish(&trans, dp, 0LL, XFS_ATTR_FORK, |
| 821 | (!(mp->m_flags & XFS_MOUNT_WSYNC) |
| 822 | ? 1 : 0)))) |
| 823 | goto out; |
| 824 | |
| 825 | /* |
| 826 | * Commit the last in the sequence of transactions. |
| 827 | */ |
| 828 | xfs_trans_log_inode(trans, dp, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 829 | error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 831 | |
| 832 | return(error); |
| 833 | |
| 834 | out: |
| 835 | xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 836 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 837 | return(error); |
| 838 | } |
| 839 | |
| 840 | |
| 841 | |
| 842 | /*======================================================================== |
| 843 | * External routines when attribute list is inside the inode |
| 844 | *========================================================================*/ |
| 845 | |
| 846 | /* |
| 847 | * Add a name to the shortform attribute list structure |
| 848 | * This is the external routine. |
| 849 | */ |
| 850 | STATIC int |
| 851 | xfs_attr_shortform_addname(xfs_da_args_t *args) |
| 852 | { |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 853 | int newsize, forkoff, retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | |
| 855 | retval = xfs_attr_shortform_lookup(args); |
| 856 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { |
| 857 | return(retval); |
| 858 | } else if (retval == EEXIST) { |
| 859 | if (args->flags & ATTR_CREATE) |
| 860 | return(retval); |
| 861 | retval = xfs_attr_shortform_remove(args); |
| 862 | ASSERT(retval == 0); |
| 863 | } |
| 864 | |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 865 | if (args->namelen >= XFS_ATTR_SF_ENTSIZE_MAX || |
| 866 | args->valuelen >= XFS_ATTR_SF_ENTSIZE_MAX) |
| 867 | return(XFS_ERROR(ENOSPC)); |
| 868 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | newsize = XFS_ATTR_SF_TOTSIZE(args->dp); |
| 870 | newsize += XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 871 | |
| 872 | forkoff = xfs_attr_shortform_bytesfit(args->dp, newsize); |
| 873 | if (!forkoff) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | return(XFS_ERROR(ENOSPC)); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 875 | |
| 876 | xfs_attr_shortform_add(args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | return(0); |
| 878 | } |
| 879 | |
| 880 | |
| 881 | /*======================================================================== |
| 882 | * External routines when attribute list is one block |
| 883 | *========================================================================*/ |
| 884 | |
| 885 | /* |
| 886 | * Add a name to the leaf attribute list structure |
| 887 | * |
| 888 | * This leaf block cannot have a "remote" value, we only call this routine |
| 889 | * if bmap_one_block() says there is only one block (ie: no remote blks). |
| 890 | */ |
David Chinner | a8272ce | 2007-11-23 16:28:09 +1100 | [diff] [blame] | 891 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | xfs_attr_leaf_addname(xfs_da_args_t *args) |
| 893 | { |
| 894 | xfs_inode_t *dp; |
| 895 | xfs_dabuf_t *bp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 896 | int retval, error, committed, forkoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
| 898 | /* |
| 899 | * Read the (only) block in the attribute list in. |
| 900 | */ |
| 901 | dp = args->dp; |
| 902 | args->blkno = 0; |
| 903 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, |
| 904 | XFS_ATTR_FORK); |
| 905 | if (error) |
| 906 | return(error); |
| 907 | ASSERT(bp != NULL); |
| 908 | |
| 909 | /* |
| 910 | * Look up the given attribute in the leaf block. Figure out if |
| 911 | * the given flags produce an error or call for an atomic rename. |
| 912 | */ |
| 913 | retval = xfs_attr_leaf_lookup_int(bp, args); |
| 914 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { |
| 915 | xfs_da_brelse(args->trans, bp); |
| 916 | return(retval); |
| 917 | } else if (retval == EEXIST) { |
| 918 | if (args->flags & ATTR_CREATE) { /* pure create op */ |
| 919 | xfs_da_brelse(args->trans, bp); |
| 920 | return(retval); |
| 921 | } |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 922 | args->op_flags |= XFS_DA_OP_RENAME; /* an atomic rename */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | args->blkno2 = args->blkno; /* set 2nd entry info*/ |
| 924 | args->index2 = args->index; |
| 925 | args->rmtblkno2 = args->rmtblkno; |
| 926 | args->rmtblkcnt2 = args->rmtblkcnt; |
| 927 | } |
| 928 | |
| 929 | /* |
| 930 | * Add the attribute to the leaf block, transitioning to a Btree |
| 931 | * if required. |
| 932 | */ |
| 933 | retval = xfs_attr_leaf_add(bp, args); |
| 934 | xfs_da_buf_done(bp); |
| 935 | if (retval == ENOSPC) { |
| 936 | /* |
| 937 | * Promote the attribute list to the Btree format, then |
| 938 | * Commit that transaction so that the node_addname() call |
| 939 | * can manage its own transactions. |
| 940 | */ |
| 941 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 942 | error = xfs_attr_leaf_to_node(args); |
| 943 | if (!error) { |
| 944 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 945 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | } |
| 947 | if (error) { |
| 948 | ASSERT(committed); |
| 949 | args->trans = NULL; |
| 950 | xfs_bmap_cancel(args->flist); |
| 951 | return(error); |
| 952 | } |
| 953 | |
| 954 | /* |
| 955 | * bmap_finish() may have committed the last trans and started |
| 956 | * a new one. We need the inode to be in all transactions. |
| 957 | */ |
| 958 | if (committed) { |
| 959 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 960 | xfs_trans_ihold(args->trans, dp); |
| 961 | } |
| 962 | |
| 963 | /* |
| 964 | * Commit the current trans (including the inode) and start |
| 965 | * a new one. |
| 966 | */ |
| 967 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 968 | return (error); |
| 969 | |
| 970 | /* |
| 971 | * Fob the whole rest of the problem off on the Btree code. |
| 972 | */ |
| 973 | error = xfs_attr_node_addname(args); |
| 974 | return(error); |
| 975 | } |
| 976 | |
| 977 | /* |
| 978 | * Commit the transaction that added the attr name so that |
| 979 | * later routines can manage their own transactions. |
| 980 | */ |
| 981 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 982 | return (error); |
| 983 | |
| 984 | /* |
| 985 | * If there was an out-of-line value, allocate the blocks we |
| 986 | * identified for its storage and copy the value. This is done |
| 987 | * after we create the attribute so that we don't overflow the |
| 988 | * maximum size of a transaction and/or hit a deadlock. |
| 989 | */ |
| 990 | if (args->rmtblkno > 0) { |
| 991 | error = xfs_attr_rmtval_set(args); |
| 992 | if (error) |
| 993 | return(error); |
| 994 | } |
| 995 | |
| 996 | /* |
| 997 | * If this is an atomic rename operation, we must "flip" the |
| 998 | * incomplete flags on the "new" and "old" attribute/value pairs |
| 999 | * so that one disappears and one appears atomically. Then we |
| 1000 | * must remove the "old" attribute/value pair. |
| 1001 | */ |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 1002 | if (args->op_flags & XFS_DA_OP_RENAME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | /* |
| 1004 | * In a separate transaction, set the incomplete flag on the |
| 1005 | * "old" attr and clear the incomplete flag on the "new" attr. |
| 1006 | */ |
| 1007 | error = xfs_attr_leaf_flipflags(args); |
| 1008 | if (error) |
| 1009 | return(error); |
| 1010 | |
| 1011 | /* |
| 1012 | * Dismantle the "old" attribute/value pair by removing |
| 1013 | * a "remote" value (if it exists). |
| 1014 | */ |
| 1015 | args->index = args->index2; |
| 1016 | args->blkno = args->blkno2; |
| 1017 | args->rmtblkno = args->rmtblkno2; |
| 1018 | args->rmtblkcnt = args->rmtblkcnt2; |
| 1019 | if (args->rmtblkno) { |
| 1020 | error = xfs_attr_rmtval_remove(args); |
| 1021 | if (error) |
| 1022 | return(error); |
| 1023 | } |
| 1024 | |
| 1025 | /* |
| 1026 | * Read in the block containing the "old" attr, then |
| 1027 | * remove the "old" attr from that block (neat, huh!) |
| 1028 | */ |
| 1029 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, |
| 1030 | &bp, XFS_ATTR_FORK); |
| 1031 | if (error) |
| 1032 | return(error); |
| 1033 | ASSERT(bp != NULL); |
| 1034 | (void)xfs_attr_leaf_remove(bp, args); |
| 1035 | |
| 1036 | /* |
| 1037 | * If the result is small enough, shrink it all into the inode. |
| 1038 | */ |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1039 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | XFS_BMAP_INIT(args->flist, args->firstblock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1041 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | /* bp is gone due to xfs_da_shrink_inode */ |
| 1043 | if (!error) { |
| 1044 | error = xfs_bmap_finish(&args->trans, |
| 1045 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | &committed); |
| 1047 | } |
| 1048 | if (error) { |
| 1049 | ASSERT(committed); |
| 1050 | args->trans = NULL; |
| 1051 | xfs_bmap_cancel(args->flist); |
| 1052 | return(error); |
| 1053 | } |
| 1054 | |
| 1055 | /* |
| 1056 | * bmap_finish() may have committed the last trans |
| 1057 | * and started a new one. We need the inode to be |
| 1058 | * in all transactions. |
| 1059 | */ |
| 1060 | if (committed) { |
| 1061 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1062 | xfs_trans_ihold(args->trans, dp); |
| 1063 | } |
| 1064 | } else |
| 1065 | xfs_da_buf_done(bp); |
| 1066 | |
| 1067 | /* |
| 1068 | * Commit the remove and start the next trans in series. |
| 1069 | */ |
| 1070 | error = xfs_attr_rolltrans(&args->trans, dp); |
| 1071 | |
| 1072 | } else if (args->rmtblkno > 0) { |
| 1073 | /* |
| 1074 | * Added a "remote" value, just clear the incomplete flag. |
| 1075 | */ |
| 1076 | error = xfs_attr_leaf_clearflag(args); |
| 1077 | } |
| 1078 | return(error); |
| 1079 | } |
| 1080 | |
| 1081 | /* |
| 1082 | * Remove a name from the leaf attribute list structure |
| 1083 | * |
| 1084 | * This leaf block cannot have a "remote" value, we only call this routine |
| 1085 | * if bmap_one_block() says there is only one block (ie: no remote blks). |
| 1086 | */ |
| 1087 | STATIC int |
| 1088 | xfs_attr_leaf_removename(xfs_da_args_t *args) |
| 1089 | { |
| 1090 | xfs_inode_t *dp; |
| 1091 | xfs_dabuf_t *bp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1092 | int error, committed, forkoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | |
| 1094 | /* |
| 1095 | * Remove the attribute. |
| 1096 | */ |
| 1097 | dp = args->dp; |
| 1098 | args->blkno = 0; |
| 1099 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, |
| 1100 | XFS_ATTR_FORK); |
| 1101 | if (error) { |
| 1102 | return(error); |
| 1103 | } |
| 1104 | |
| 1105 | ASSERT(bp != NULL); |
| 1106 | error = xfs_attr_leaf_lookup_int(bp, args); |
| 1107 | if (error == ENOATTR) { |
| 1108 | xfs_da_brelse(args->trans, bp); |
| 1109 | return(error); |
| 1110 | } |
| 1111 | |
| 1112 | (void)xfs_attr_leaf_remove(bp, args); |
| 1113 | |
| 1114 | /* |
| 1115 | * If the result is small enough, shrink it all into the inode. |
| 1116 | */ |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1117 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | XFS_BMAP_INIT(args->flist, args->firstblock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1119 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | /* bp is gone due to xfs_da_shrink_inode */ |
| 1121 | if (!error) { |
| 1122 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1123 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | } |
| 1125 | if (error) { |
| 1126 | ASSERT(committed); |
| 1127 | args->trans = NULL; |
| 1128 | xfs_bmap_cancel(args->flist); |
| 1129 | return(error); |
| 1130 | } |
| 1131 | |
| 1132 | /* |
| 1133 | * bmap_finish() may have committed the last trans and started |
| 1134 | * a new one. We need the inode to be in all transactions. |
| 1135 | */ |
| 1136 | if (committed) { |
| 1137 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1138 | xfs_trans_ihold(args->trans, dp); |
| 1139 | } |
| 1140 | } else |
| 1141 | xfs_da_buf_done(bp); |
| 1142 | return(0); |
| 1143 | } |
| 1144 | |
| 1145 | /* |
| 1146 | * Look up a name in a leaf attribute list structure. |
| 1147 | * |
| 1148 | * This leaf block cannot have a "remote" value, we only call this routine |
| 1149 | * if bmap_one_block() says there is only one block (ie: no remote blks). |
| 1150 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1151 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | xfs_attr_leaf_get(xfs_da_args_t *args) |
| 1153 | { |
| 1154 | xfs_dabuf_t *bp; |
| 1155 | int error; |
| 1156 | |
| 1157 | args->blkno = 0; |
| 1158 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, |
| 1159 | XFS_ATTR_FORK); |
| 1160 | if (error) |
| 1161 | return(error); |
| 1162 | ASSERT(bp != NULL); |
| 1163 | |
| 1164 | error = xfs_attr_leaf_lookup_int(bp, args); |
| 1165 | if (error != EEXIST) { |
| 1166 | xfs_da_brelse(args->trans, bp); |
| 1167 | return(error); |
| 1168 | } |
| 1169 | error = xfs_attr_leaf_getvalue(bp, args); |
| 1170 | xfs_da_brelse(args->trans, bp); |
| 1171 | if (!error && (args->rmtblkno > 0) && !(args->flags & ATTR_KERNOVAL)) { |
| 1172 | error = xfs_attr_rmtval_get(args); |
| 1173 | } |
| 1174 | return(error); |
| 1175 | } |
| 1176 | |
| 1177 | /* |
| 1178 | * Copy out attribute entries for attr_list(), for leaf attribute lists. |
| 1179 | */ |
| 1180 | STATIC int |
| 1181 | xfs_attr_leaf_list(xfs_attr_list_context_t *context) |
| 1182 | { |
| 1183 | xfs_attr_leafblock_t *leaf; |
| 1184 | int error; |
| 1185 | xfs_dabuf_t *bp; |
| 1186 | |
| 1187 | context->cursor->blkno = 0; |
| 1188 | error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK); |
| 1189 | if (error) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1190 | return XFS_ERROR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | ASSERT(bp != NULL); |
| 1192 | leaf = bp->data; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1193 | 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] | 1194 | XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW, |
| 1195 | context->dp->i_mount, leaf); |
| 1196 | xfs_da_brelse(NULL, bp); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1197 | return XFS_ERROR(EFSCORRUPTED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | } |
| 1199 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1200 | error = xfs_attr_leaf_list_int(bp, context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | xfs_da_brelse(NULL, bp); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1202 | return XFS_ERROR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | } |
| 1204 | |
| 1205 | |
| 1206 | /*======================================================================== |
| 1207 | * External routines when attribute list size > XFS_LBSIZE(mp). |
| 1208 | *========================================================================*/ |
| 1209 | |
| 1210 | /* |
| 1211 | * Add a name to a Btree-format attribute list. |
| 1212 | * |
| 1213 | * This will involve walking down the Btree, and may involve splitting |
| 1214 | * leaf nodes and even splitting intermediate nodes up to and including |
| 1215 | * the root node (a special case of an intermediate node). |
| 1216 | * |
| 1217 | * "Remote" attribute values confuse the issue and atomic rename operations |
| 1218 | * add a whole extra layer of confusion on top of that. |
| 1219 | */ |
| 1220 | STATIC int |
| 1221 | xfs_attr_node_addname(xfs_da_args_t *args) |
| 1222 | { |
| 1223 | xfs_da_state_t *state; |
| 1224 | xfs_da_state_blk_t *blk; |
| 1225 | xfs_inode_t *dp; |
| 1226 | xfs_mount_t *mp; |
| 1227 | int committed, retval, error; |
| 1228 | |
| 1229 | /* |
| 1230 | * Fill in bucket of arguments/results/context to carry around. |
| 1231 | */ |
| 1232 | dp = args->dp; |
| 1233 | mp = dp->i_mount; |
| 1234 | restart: |
| 1235 | state = xfs_da_state_alloc(); |
| 1236 | state->args = args; |
| 1237 | state->mp = mp; |
| 1238 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1239 | state->node_ents = state->mp->m_attr_node_ents; |
| 1240 | |
| 1241 | /* |
| 1242 | * Search to see if name already exists, and get back a pointer |
| 1243 | * to where it should go. |
| 1244 | */ |
| 1245 | error = xfs_da_node_lookup_int(state, &retval); |
| 1246 | if (error) |
| 1247 | goto out; |
| 1248 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1249 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1250 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { |
| 1251 | goto out; |
| 1252 | } else if (retval == EEXIST) { |
| 1253 | if (args->flags & ATTR_CREATE) |
| 1254 | goto out; |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 1255 | args->op_flags |= XFS_DA_OP_RENAME; /* atomic rename op */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | args->blkno2 = args->blkno; /* set 2nd entry info*/ |
| 1257 | args->index2 = args->index; |
| 1258 | args->rmtblkno2 = args->rmtblkno; |
| 1259 | args->rmtblkcnt2 = args->rmtblkcnt; |
| 1260 | args->rmtblkno = 0; |
| 1261 | args->rmtblkcnt = 0; |
| 1262 | } |
| 1263 | |
| 1264 | retval = xfs_attr_leaf_add(blk->bp, state->args); |
| 1265 | if (retval == ENOSPC) { |
| 1266 | if (state->path.active == 1) { |
| 1267 | /* |
| 1268 | * Its really a single leaf node, but it had |
| 1269 | * out-of-line values so it looked like it *might* |
| 1270 | * have been a b-tree. |
| 1271 | */ |
| 1272 | xfs_da_state_free(state); |
| 1273 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 1274 | error = xfs_attr_leaf_to_node(args); |
| 1275 | if (!error) { |
| 1276 | error = xfs_bmap_finish(&args->trans, |
| 1277 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | &committed); |
| 1279 | } |
| 1280 | if (error) { |
| 1281 | ASSERT(committed); |
| 1282 | args->trans = NULL; |
| 1283 | xfs_bmap_cancel(args->flist); |
| 1284 | goto out; |
| 1285 | } |
| 1286 | |
| 1287 | /* |
| 1288 | * bmap_finish() may have committed the last trans |
| 1289 | * and started a new one. We need the inode to be |
| 1290 | * in all transactions. |
| 1291 | */ |
| 1292 | if (committed) { |
| 1293 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1294 | xfs_trans_ihold(args->trans, dp); |
| 1295 | } |
| 1296 | |
| 1297 | /* |
| 1298 | * Commit the node conversion and start the next |
| 1299 | * trans in the chain. |
| 1300 | */ |
| 1301 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1302 | goto out; |
| 1303 | |
| 1304 | goto restart; |
| 1305 | } |
| 1306 | |
| 1307 | /* |
| 1308 | * Split as many Btree elements as required. |
| 1309 | * This code tracks the new and old attr's location |
| 1310 | * in the index/blkno/rmtblkno/rmtblkcnt fields and |
| 1311 | * in the index2/blkno2/rmtblkno2/rmtblkcnt2 fields. |
| 1312 | */ |
| 1313 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 1314 | error = xfs_da_split(state); |
| 1315 | if (!error) { |
| 1316 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1317 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | } |
| 1319 | if (error) { |
| 1320 | ASSERT(committed); |
| 1321 | args->trans = NULL; |
| 1322 | xfs_bmap_cancel(args->flist); |
| 1323 | goto out; |
| 1324 | } |
| 1325 | |
| 1326 | /* |
| 1327 | * bmap_finish() may have committed the last trans and started |
| 1328 | * a new one. We need the inode to be in all transactions. |
| 1329 | */ |
| 1330 | if (committed) { |
| 1331 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1332 | xfs_trans_ihold(args->trans, dp); |
| 1333 | } |
| 1334 | } else { |
| 1335 | /* |
| 1336 | * Addition succeeded, update Btree hashvals. |
| 1337 | */ |
| 1338 | xfs_da_fixhashpath(state, &state->path); |
| 1339 | } |
| 1340 | |
| 1341 | /* |
| 1342 | * Kill the state structure, we're done with it and need to |
| 1343 | * allow the buffers to come back later. |
| 1344 | */ |
| 1345 | xfs_da_state_free(state); |
| 1346 | state = NULL; |
| 1347 | |
| 1348 | /* |
| 1349 | * Commit the leaf addition or btree split and start the next |
| 1350 | * trans in the chain. |
| 1351 | */ |
| 1352 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1353 | goto out; |
| 1354 | |
| 1355 | /* |
| 1356 | * If there was an out-of-line value, allocate the blocks we |
| 1357 | * identified for its storage and copy the value. This is done |
| 1358 | * after we create the attribute so that we don't overflow the |
| 1359 | * maximum size of a transaction and/or hit a deadlock. |
| 1360 | */ |
| 1361 | if (args->rmtblkno > 0) { |
| 1362 | error = xfs_attr_rmtval_set(args); |
| 1363 | if (error) |
| 1364 | return(error); |
| 1365 | } |
| 1366 | |
| 1367 | /* |
| 1368 | * If this is an atomic rename operation, we must "flip" the |
| 1369 | * incomplete flags on the "new" and "old" attribute/value pairs |
| 1370 | * so that one disappears and one appears atomically. Then we |
| 1371 | * must remove the "old" attribute/value pair. |
| 1372 | */ |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 1373 | if (args->op_flags & XFS_DA_OP_RENAME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | /* |
| 1375 | * In a separate transaction, set the incomplete flag on the |
| 1376 | * "old" attr and clear the incomplete flag on the "new" attr. |
| 1377 | */ |
| 1378 | error = xfs_attr_leaf_flipflags(args); |
| 1379 | if (error) |
| 1380 | goto out; |
| 1381 | |
| 1382 | /* |
| 1383 | * Dismantle the "old" attribute/value pair by removing |
| 1384 | * a "remote" value (if it exists). |
| 1385 | */ |
| 1386 | args->index = args->index2; |
| 1387 | args->blkno = args->blkno2; |
| 1388 | args->rmtblkno = args->rmtblkno2; |
| 1389 | args->rmtblkcnt = args->rmtblkcnt2; |
| 1390 | if (args->rmtblkno) { |
| 1391 | error = xfs_attr_rmtval_remove(args); |
| 1392 | if (error) |
| 1393 | return(error); |
| 1394 | } |
| 1395 | |
| 1396 | /* |
| 1397 | * Re-find the "old" attribute entry after any split ops. |
| 1398 | * The INCOMPLETE flag means that we will find the "old" |
| 1399 | * attr, not the "new" one. |
| 1400 | */ |
| 1401 | args->flags |= XFS_ATTR_INCOMPLETE; |
| 1402 | state = xfs_da_state_alloc(); |
| 1403 | state->args = args; |
| 1404 | state->mp = mp; |
| 1405 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1406 | state->node_ents = state->mp->m_attr_node_ents; |
| 1407 | state->inleaf = 0; |
| 1408 | error = xfs_da_node_lookup_int(state, &retval); |
| 1409 | if (error) |
| 1410 | goto out; |
| 1411 | |
| 1412 | /* |
| 1413 | * Remove the name and update the hashvals in the tree. |
| 1414 | */ |
| 1415 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1416 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1417 | error = xfs_attr_leaf_remove(blk->bp, args); |
| 1418 | xfs_da_fixhashpath(state, &state->path); |
| 1419 | |
| 1420 | /* |
| 1421 | * Check to see if the tree needs to be collapsed. |
| 1422 | */ |
| 1423 | if (retval && (state->path.active > 1)) { |
| 1424 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 1425 | error = xfs_da_join(state); |
| 1426 | if (!error) { |
| 1427 | error = xfs_bmap_finish(&args->trans, |
| 1428 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | &committed); |
| 1430 | } |
| 1431 | if (error) { |
| 1432 | ASSERT(committed); |
| 1433 | args->trans = NULL; |
| 1434 | xfs_bmap_cancel(args->flist); |
| 1435 | goto out; |
| 1436 | } |
| 1437 | |
| 1438 | /* |
| 1439 | * bmap_finish() may have committed the last trans |
| 1440 | * and started a new one. We need the inode to be |
| 1441 | * in all transactions. |
| 1442 | */ |
| 1443 | if (committed) { |
| 1444 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1445 | xfs_trans_ihold(args->trans, dp); |
| 1446 | } |
| 1447 | } |
| 1448 | |
| 1449 | /* |
| 1450 | * Commit and start the next trans in the chain. |
| 1451 | */ |
| 1452 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1453 | goto out; |
| 1454 | |
| 1455 | } else if (args->rmtblkno > 0) { |
| 1456 | /* |
| 1457 | * Added a "remote" value, just clear the incomplete flag. |
| 1458 | */ |
| 1459 | error = xfs_attr_leaf_clearflag(args); |
| 1460 | if (error) |
| 1461 | goto out; |
| 1462 | } |
| 1463 | retval = error = 0; |
| 1464 | |
| 1465 | out: |
| 1466 | if (state) |
| 1467 | xfs_da_state_free(state); |
| 1468 | if (error) |
| 1469 | return(error); |
| 1470 | return(retval); |
| 1471 | } |
| 1472 | |
| 1473 | /* |
| 1474 | * Remove a name from a B-tree attribute list. |
| 1475 | * |
| 1476 | * This will involve walking down the Btree, and may involve joining |
| 1477 | * leaf nodes and even joining intermediate nodes up to and including |
| 1478 | * the root node (a special case of an intermediate node). |
| 1479 | */ |
| 1480 | STATIC int |
| 1481 | xfs_attr_node_removename(xfs_da_args_t *args) |
| 1482 | { |
| 1483 | xfs_da_state_t *state; |
| 1484 | xfs_da_state_blk_t *blk; |
| 1485 | xfs_inode_t *dp; |
| 1486 | xfs_dabuf_t *bp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1487 | int retval, error, committed, forkoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | |
| 1489 | /* |
| 1490 | * Tie a string around our finger to remind us where we are. |
| 1491 | */ |
| 1492 | dp = args->dp; |
| 1493 | state = xfs_da_state_alloc(); |
| 1494 | state->args = args; |
| 1495 | state->mp = dp->i_mount; |
| 1496 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1497 | state->node_ents = state->mp->m_attr_node_ents; |
| 1498 | |
| 1499 | /* |
| 1500 | * Search to see if name exists, and get back a pointer to it. |
| 1501 | */ |
| 1502 | error = xfs_da_node_lookup_int(state, &retval); |
| 1503 | if (error || (retval != EEXIST)) { |
| 1504 | if (error == 0) |
| 1505 | error = retval; |
| 1506 | goto out; |
| 1507 | } |
| 1508 | |
| 1509 | /* |
| 1510 | * If there is an out-of-line value, de-allocate the blocks. |
| 1511 | * This is done before we remove the attribute so that we don't |
| 1512 | * overflow the maximum size of a transaction and/or hit a deadlock. |
| 1513 | */ |
| 1514 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1515 | ASSERT(blk->bp != NULL); |
| 1516 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1517 | if (args->rmtblkno > 0) { |
| 1518 | /* |
| 1519 | * Fill in disk block numbers in the state structure |
| 1520 | * so that we can get the buffers back after we commit |
| 1521 | * several transactions in the following calls. |
| 1522 | */ |
| 1523 | error = xfs_attr_fillstate(state); |
| 1524 | if (error) |
| 1525 | goto out; |
| 1526 | |
| 1527 | /* |
| 1528 | * Mark the attribute as INCOMPLETE, then bunmapi() the |
| 1529 | * remote value. |
| 1530 | */ |
| 1531 | error = xfs_attr_leaf_setflag(args); |
| 1532 | if (error) |
| 1533 | goto out; |
| 1534 | error = xfs_attr_rmtval_remove(args); |
| 1535 | if (error) |
| 1536 | goto out; |
| 1537 | |
| 1538 | /* |
| 1539 | * Refill the state structure with buffers, the prior calls |
| 1540 | * released our buffers. |
| 1541 | */ |
| 1542 | error = xfs_attr_refillstate(state); |
| 1543 | if (error) |
| 1544 | goto out; |
| 1545 | } |
| 1546 | |
| 1547 | /* |
| 1548 | * Remove the name and update the hashvals in the tree. |
| 1549 | */ |
| 1550 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1551 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1552 | retval = xfs_attr_leaf_remove(blk->bp, args); |
| 1553 | xfs_da_fixhashpath(state, &state->path); |
| 1554 | |
| 1555 | /* |
| 1556 | * Check to see if the tree needs to be collapsed. |
| 1557 | */ |
| 1558 | if (retval && (state->path.active > 1)) { |
| 1559 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 1560 | error = xfs_da_join(state); |
| 1561 | if (!error) { |
| 1562 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1563 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | } |
| 1565 | if (error) { |
| 1566 | ASSERT(committed); |
| 1567 | args->trans = NULL; |
| 1568 | xfs_bmap_cancel(args->flist); |
| 1569 | goto out; |
| 1570 | } |
| 1571 | |
| 1572 | /* |
| 1573 | * bmap_finish() may have committed the last trans and started |
| 1574 | * a new one. We need the inode to be in all transactions. |
| 1575 | */ |
| 1576 | if (committed) { |
| 1577 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1578 | xfs_trans_ihold(args->trans, dp); |
| 1579 | } |
| 1580 | |
| 1581 | /* |
| 1582 | * Commit the Btree join operation and start a new trans. |
| 1583 | */ |
| 1584 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 1585 | goto out; |
| 1586 | } |
| 1587 | |
| 1588 | /* |
| 1589 | * If the result is small enough, push it all into the inode. |
| 1590 | */ |
| 1591 | if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 1592 | /* |
| 1593 | * Have to get rid of the copy of this dabuf in the state. |
| 1594 | */ |
| 1595 | ASSERT(state->path.active == 1); |
| 1596 | ASSERT(state->path.blk[0].bp); |
| 1597 | xfs_da_buf_done(state->path.blk[0].bp); |
| 1598 | state->path.blk[0].bp = NULL; |
| 1599 | |
| 1600 | error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, |
| 1601 | XFS_ATTR_FORK); |
| 1602 | if (error) |
| 1603 | goto out; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1604 | ASSERT(be16_to_cpu(((xfs_attr_leafblock_t *) |
| 1605 | bp->data)->hdr.info.magic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | == XFS_ATTR_LEAF_MAGIC); |
| 1607 | |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1608 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | XFS_BMAP_INIT(args->flist, args->firstblock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1610 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | /* bp is gone due to xfs_da_shrink_inode */ |
| 1612 | if (!error) { |
| 1613 | error = xfs_bmap_finish(&args->trans, |
| 1614 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | &committed); |
| 1616 | } |
| 1617 | if (error) { |
| 1618 | ASSERT(committed); |
| 1619 | args->trans = NULL; |
| 1620 | xfs_bmap_cancel(args->flist); |
| 1621 | goto out; |
| 1622 | } |
| 1623 | |
| 1624 | /* |
| 1625 | * bmap_finish() may have committed the last trans |
| 1626 | * and started a new one. We need the inode to be |
| 1627 | * in all transactions. |
| 1628 | */ |
| 1629 | if (committed) { |
| 1630 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 1631 | xfs_trans_ihold(args->trans, dp); |
| 1632 | } |
| 1633 | } else |
| 1634 | xfs_da_brelse(args->trans, bp); |
| 1635 | } |
| 1636 | error = 0; |
| 1637 | |
| 1638 | out: |
| 1639 | xfs_da_state_free(state); |
| 1640 | return(error); |
| 1641 | } |
| 1642 | |
| 1643 | /* |
| 1644 | * Fill in the disk block numbers in the state structure for the buffers |
| 1645 | * that are attached to the state structure. |
| 1646 | * 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] | 1647 | * after some set of transaction commits have released these buffers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | */ |
| 1649 | STATIC int |
| 1650 | xfs_attr_fillstate(xfs_da_state_t *state) |
| 1651 | { |
| 1652 | xfs_da_state_path_t *path; |
| 1653 | xfs_da_state_blk_t *blk; |
| 1654 | int level; |
| 1655 | |
| 1656 | /* |
| 1657 | * Roll down the "path" in the state structure, storing the on-disk |
| 1658 | * block number for those buffers in the "path". |
| 1659 | */ |
| 1660 | path = &state->path; |
| 1661 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1662 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1663 | if (blk->bp) { |
| 1664 | blk->disk_blkno = xfs_da_blkno(blk->bp); |
| 1665 | xfs_da_buf_done(blk->bp); |
| 1666 | blk->bp = NULL; |
| 1667 | } else { |
| 1668 | blk->disk_blkno = 0; |
| 1669 | } |
| 1670 | } |
| 1671 | |
| 1672 | /* |
| 1673 | * Roll down the "altpath" in the state structure, storing the on-disk |
| 1674 | * block number for those buffers in the "altpath". |
| 1675 | */ |
| 1676 | path = &state->altpath; |
| 1677 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1678 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1679 | if (blk->bp) { |
| 1680 | blk->disk_blkno = xfs_da_blkno(blk->bp); |
| 1681 | xfs_da_buf_done(blk->bp); |
| 1682 | blk->bp = NULL; |
| 1683 | } else { |
| 1684 | blk->disk_blkno = 0; |
| 1685 | } |
| 1686 | } |
| 1687 | |
| 1688 | return(0); |
| 1689 | } |
| 1690 | |
| 1691 | /* |
| 1692 | * Reattach the buffers to the state structure based on the disk block |
| 1693 | * numbers stored in the state structure. |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1694 | * This is done after some set of transaction commits have released those |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | * buffers from our grip. |
| 1696 | */ |
| 1697 | STATIC int |
| 1698 | xfs_attr_refillstate(xfs_da_state_t *state) |
| 1699 | { |
| 1700 | xfs_da_state_path_t *path; |
| 1701 | xfs_da_state_blk_t *blk; |
| 1702 | int level, error; |
| 1703 | |
| 1704 | /* |
| 1705 | * Roll down the "path" in the state structure, storing the on-disk |
| 1706 | * block number for those buffers in the "path". |
| 1707 | */ |
| 1708 | path = &state->path; |
| 1709 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1710 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1711 | if (blk->disk_blkno) { |
| 1712 | error = xfs_da_read_buf(state->args->trans, |
| 1713 | state->args->dp, |
| 1714 | blk->blkno, blk->disk_blkno, |
| 1715 | &blk->bp, XFS_ATTR_FORK); |
| 1716 | if (error) |
| 1717 | return(error); |
| 1718 | } else { |
| 1719 | blk->bp = NULL; |
| 1720 | } |
| 1721 | } |
| 1722 | |
| 1723 | /* |
| 1724 | * Roll down the "altpath" in the state structure, storing the on-disk |
| 1725 | * block number for those buffers in the "altpath". |
| 1726 | */ |
| 1727 | path = &state->altpath; |
| 1728 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1729 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1730 | if (blk->disk_blkno) { |
| 1731 | error = xfs_da_read_buf(state->args->trans, |
| 1732 | state->args->dp, |
| 1733 | blk->blkno, blk->disk_blkno, |
| 1734 | &blk->bp, XFS_ATTR_FORK); |
| 1735 | if (error) |
| 1736 | return(error); |
| 1737 | } else { |
| 1738 | blk->bp = NULL; |
| 1739 | } |
| 1740 | } |
| 1741 | |
| 1742 | return(0); |
| 1743 | } |
| 1744 | |
| 1745 | /* |
| 1746 | * Look up a filename in a node attribute list. |
| 1747 | * |
| 1748 | * This routine gets called for any attribute fork that has more than one |
| 1749 | * block, ie: both true Btree attr lists and for single-leaf-blocks with |
| 1750 | * "remote" values taking up more blocks. |
| 1751 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1752 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | xfs_attr_node_get(xfs_da_args_t *args) |
| 1754 | { |
| 1755 | xfs_da_state_t *state; |
| 1756 | xfs_da_state_blk_t *blk; |
| 1757 | int error, retval; |
| 1758 | int i; |
| 1759 | |
| 1760 | state = xfs_da_state_alloc(); |
| 1761 | state->args = args; |
| 1762 | state->mp = args->dp->i_mount; |
| 1763 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1764 | state->node_ents = state->mp->m_attr_node_ents; |
| 1765 | |
| 1766 | /* |
| 1767 | * Search to see if name exists, and get back a pointer to it. |
| 1768 | */ |
| 1769 | error = xfs_da_node_lookup_int(state, &retval); |
| 1770 | if (error) { |
| 1771 | retval = error; |
| 1772 | } else if (retval == EEXIST) { |
| 1773 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1774 | ASSERT(blk->bp != NULL); |
| 1775 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1776 | |
| 1777 | /* |
| 1778 | * Get the value, local or "remote" |
| 1779 | */ |
| 1780 | retval = xfs_attr_leaf_getvalue(blk->bp, args); |
| 1781 | if (!retval && (args->rmtblkno > 0) |
| 1782 | && !(args->flags & ATTR_KERNOVAL)) { |
| 1783 | retval = xfs_attr_rmtval_get(args); |
| 1784 | } |
| 1785 | } |
| 1786 | |
| 1787 | /* |
| 1788 | * If not in a transaction, we have to release all the buffers. |
| 1789 | */ |
| 1790 | for (i = 0; i < state->path.active; i++) { |
| 1791 | xfs_da_brelse(args->trans, state->path.blk[i].bp); |
| 1792 | state->path.blk[i].bp = NULL; |
| 1793 | } |
| 1794 | |
| 1795 | xfs_da_state_free(state); |
| 1796 | return(retval); |
| 1797 | } |
| 1798 | |
| 1799 | STATIC int /* error */ |
| 1800 | xfs_attr_node_list(xfs_attr_list_context_t *context) |
| 1801 | { |
| 1802 | attrlist_cursor_kern_t *cursor; |
| 1803 | xfs_attr_leafblock_t *leaf; |
| 1804 | xfs_da_intnode_t *node; |
| 1805 | xfs_da_node_entry_t *btree; |
| 1806 | int error, i; |
| 1807 | xfs_dabuf_t *bp; |
| 1808 | |
| 1809 | cursor = context->cursor; |
| 1810 | cursor->initted = 1; |
| 1811 | |
| 1812 | /* |
| 1813 | * Do all sorts of validation on the passed-in cursor structure. |
| 1814 | * If anything is amiss, ignore the cursor and look up the hashval |
| 1815 | * starting from the btree root. |
| 1816 | */ |
| 1817 | bp = NULL; |
| 1818 | if (cursor->blkno > 0) { |
| 1819 | error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, |
| 1820 | &bp, XFS_ATTR_FORK); |
| 1821 | if ((error != 0) && (error != EFSCORRUPTED)) |
| 1822 | return(error); |
| 1823 | if (bp) { |
| 1824 | node = bp->data; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1825 | switch (be16_to_cpu(node->hdr.info.magic)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | case XFS_DA_NODE_MAGIC: |
| 1827 | xfs_attr_trace_l_cn("wrong blk", context, node); |
| 1828 | xfs_da_brelse(NULL, bp); |
| 1829 | bp = NULL; |
| 1830 | break; |
| 1831 | case XFS_ATTR_LEAF_MAGIC: |
| 1832 | leaf = bp->data; |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1833 | if (cursor->hashval > be32_to_cpu(leaf->entries[ |
| 1834 | be16_to_cpu(leaf->hdr.count)-1].hashval)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | xfs_attr_trace_l_cl("wrong blk", |
| 1836 | context, leaf); |
| 1837 | xfs_da_brelse(NULL, bp); |
| 1838 | bp = NULL; |
| 1839 | } else if (cursor->hashval <= |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1840 | be32_to_cpu(leaf->entries[0].hashval)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | xfs_attr_trace_l_cl("maybe wrong blk", |
| 1842 | context, leaf); |
| 1843 | xfs_da_brelse(NULL, bp); |
| 1844 | bp = NULL; |
| 1845 | } |
| 1846 | break; |
| 1847 | default: |
| 1848 | xfs_attr_trace_l_c("wrong blk - ??", context); |
| 1849 | xfs_da_brelse(NULL, bp); |
| 1850 | bp = NULL; |
| 1851 | } |
| 1852 | } |
| 1853 | } |
| 1854 | |
| 1855 | /* |
| 1856 | * We did not find what we expected given the cursor's contents, |
| 1857 | * so we start from the top and work down based on the hash value. |
| 1858 | * Note that start of node block is same as start of leaf block. |
| 1859 | */ |
| 1860 | if (bp == NULL) { |
| 1861 | cursor->blkno = 0; |
| 1862 | for (;;) { |
| 1863 | error = xfs_da_read_buf(NULL, context->dp, |
| 1864 | cursor->blkno, -1, &bp, |
| 1865 | XFS_ATTR_FORK); |
| 1866 | if (error) |
| 1867 | return(error); |
| 1868 | if (unlikely(bp == NULL)) { |
| 1869 | XFS_ERROR_REPORT("xfs_attr_node_list(2)", |
| 1870 | XFS_ERRLEVEL_LOW, |
| 1871 | context->dp->i_mount); |
| 1872 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1873 | } |
| 1874 | node = bp->data; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1875 | if (be16_to_cpu(node->hdr.info.magic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | == XFS_ATTR_LEAF_MAGIC) |
| 1877 | break; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1878 | if (unlikely(be16_to_cpu(node->hdr.info.magic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | != XFS_DA_NODE_MAGIC)) { |
| 1880 | XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)", |
| 1881 | XFS_ERRLEVEL_LOW, |
| 1882 | context->dp->i_mount, |
| 1883 | node); |
| 1884 | xfs_da_brelse(NULL, bp); |
| 1885 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1886 | } |
| 1887 | btree = node->btree; |
Nathan Scott | fac80cc | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 1888 | for (i = 0; i < be16_to_cpu(node->hdr.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | btree++, i++) { |
| 1890 | if (cursor->hashval |
Nathan Scott | 403432d | 2006-03-17 17:29:46 +1100 | [diff] [blame] | 1891 | <= be32_to_cpu(btree->hashval)) { |
| 1892 | cursor->blkno = be32_to_cpu(btree->before); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | xfs_attr_trace_l_cb("descending", |
| 1894 | context, btree); |
| 1895 | break; |
| 1896 | } |
| 1897 | } |
Nathan Scott | fac80cc | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 1898 | if (i == be16_to_cpu(node->hdr.count)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | xfs_da_brelse(NULL, bp); |
| 1900 | return(0); |
| 1901 | } |
| 1902 | xfs_da_brelse(NULL, bp); |
| 1903 | } |
| 1904 | } |
| 1905 | ASSERT(bp != NULL); |
| 1906 | |
| 1907 | /* |
| 1908 | * Roll upward through the blocks, processing each leaf block in |
| 1909 | * order. As long as there is space in the result buffer, keep |
| 1910 | * adding the information. |
| 1911 | */ |
| 1912 | for (;;) { |
| 1913 | leaf = bp->data; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1914 | if (unlikely(be16_to_cpu(leaf->hdr.info.magic) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | != XFS_ATTR_LEAF_MAGIC)) { |
| 1916 | XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)", |
| 1917 | XFS_ERRLEVEL_LOW, |
| 1918 | context->dp->i_mount, leaf); |
| 1919 | xfs_da_brelse(NULL, bp); |
| 1920 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1921 | } |
| 1922 | error = xfs_attr_leaf_list_int(bp, context); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1923 | if (error) { |
| 1924 | xfs_da_brelse(NULL, bp); |
| 1925 | return error; |
| 1926 | } |
| 1927 | if (context->seen_enough || leaf->hdr.info.forw == 0) |
| 1928 | break; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1929 | cursor->blkno = be32_to_cpu(leaf->hdr.info.forw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | xfs_da_brelse(NULL, bp); |
| 1931 | error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, |
| 1932 | &bp, XFS_ATTR_FORK); |
| 1933 | if (error) |
| 1934 | return(error); |
| 1935 | if (unlikely((bp == NULL))) { |
| 1936 | XFS_ERROR_REPORT("xfs_attr_node_list(5)", |
| 1937 | XFS_ERRLEVEL_LOW, |
| 1938 | context->dp->i_mount); |
| 1939 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1940 | } |
| 1941 | } |
| 1942 | xfs_da_brelse(NULL, bp); |
| 1943 | return(0); |
| 1944 | } |
| 1945 | |
| 1946 | |
| 1947 | /*======================================================================== |
| 1948 | * External routines for manipulating out-of-line attribute values. |
| 1949 | *========================================================================*/ |
| 1950 | |
| 1951 | /* |
| 1952 | * Read the value associated with an attribute from the out-of-line buffer |
| 1953 | * that we stored it in. |
| 1954 | */ |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1955 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | xfs_attr_rmtval_get(xfs_da_args_t *args) |
| 1957 | { |
| 1958 | xfs_bmbt_irec_t map[ATTR_RMTVALUE_MAPSIZE]; |
| 1959 | xfs_mount_t *mp; |
| 1960 | xfs_daddr_t dblkno; |
| 1961 | xfs_caddr_t dst; |
| 1962 | xfs_buf_t *bp; |
| 1963 | int nmap, error, tmp, valuelen, blkcnt, i; |
| 1964 | xfs_dablk_t lblkno; |
| 1965 | |
| 1966 | ASSERT(!(args->flags & ATTR_KERNOVAL)); |
| 1967 | |
| 1968 | mp = args->dp->i_mount; |
| 1969 | dst = args->value; |
| 1970 | valuelen = args->valuelen; |
| 1971 | lblkno = args->rmtblkno; |
| 1972 | while (valuelen > 0) { |
| 1973 | nmap = ATTR_RMTVALUE_MAPSIZE; |
| 1974 | error = xfs_bmapi(args->trans, args->dp, (xfs_fileoff_t)lblkno, |
| 1975 | args->rmtblkcnt, |
| 1976 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 1977 | NULL, 0, map, &nmap, NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1978 | if (error) |
| 1979 | return(error); |
| 1980 | ASSERT(nmap >= 1); |
| 1981 | |
| 1982 | for (i = 0; (i < nmap) && (valuelen > 0); i++) { |
| 1983 | ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && |
| 1984 | (map[i].br_startblock != HOLESTARTBLOCK)); |
| 1985 | dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); |
| 1986 | blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
| 1987 | error = xfs_read_buf(mp, mp->m_ddev_targp, dblkno, |
| 1988 | blkcnt, XFS_BUF_LOCK, &bp); |
| 1989 | if (error) |
| 1990 | return(error); |
| 1991 | |
| 1992 | tmp = (valuelen < XFS_BUF_SIZE(bp)) |
| 1993 | ? valuelen : XFS_BUF_SIZE(bp); |
| 1994 | xfs_biomove(bp, 0, tmp, dst, XFS_B_READ); |
| 1995 | xfs_buf_relse(bp); |
| 1996 | dst += tmp; |
| 1997 | valuelen -= tmp; |
| 1998 | |
| 1999 | lblkno += map[i].br_blockcount; |
| 2000 | } |
| 2001 | } |
| 2002 | ASSERT(valuelen == 0); |
| 2003 | return(0); |
| 2004 | } |
| 2005 | |
| 2006 | /* |
| 2007 | * Write the value associated with an attribute into the out-of-line buffer |
| 2008 | * that we have defined for it. |
| 2009 | */ |
| 2010 | STATIC int |
| 2011 | xfs_attr_rmtval_set(xfs_da_args_t *args) |
| 2012 | { |
| 2013 | xfs_mount_t *mp; |
| 2014 | xfs_fileoff_t lfileoff; |
| 2015 | xfs_inode_t *dp; |
| 2016 | xfs_bmbt_irec_t map; |
| 2017 | xfs_daddr_t dblkno; |
| 2018 | xfs_caddr_t src; |
| 2019 | xfs_buf_t *bp; |
| 2020 | xfs_dablk_t lblkno; |
| 2021 | int blkcnt, valuelen, nmap, error, tmp, committed; |
| 2022 | |
| 2023 | dp = args->dp; |
| 2024 | mp = dp->i_mount; |
| 2025 | src = args->value; |
| 2026 | |
| 2027 | /* |
| 2028 | * Find a "hole" in the attribute address space large enough for |
| 2029 | * us to drop the new attribute's value into. |
| 2030 | */ |
| 2031 | blkcnt = XFS_B_TO_FSB(mp, args->valuelen); |
| 2032 | lfileoff = 0; |
| 2033 | error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, |
| 2034 | XFS_ATTR_FORK); |
| 2035 | if (error) { |
| 2036 | return(error); |
| 2037 | } |
| 2038 | args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff; |
| 2039 | args->rmtblkcnt = blkcnt; |
| 2040 | |
| 2041 | /* |
| 2042 | * Roll through the "value", allocating blocks on disk as required. |
| 2043 | */ |
| 2044 | while (blkcnt > 0) { |
| 2045 | /* |
| 2046 | * Allocate a single extent, up to the size of the value. |
| 2047 | */ |
| 2048 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 2049 | nmap = 1; |
| 2050 | error = xfs_bmapi(args->trans, dp, (xfs_fileoff_t)lblkno, |
| 2051 | blkcnt, |
| 2052 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA | |
| 2053 | XFS_BMAPI_WRITE, |
| 2054 | args->firstblock, args->total, &map, &nmap, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2055 | args->flist, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | if (!error) { |
| 2057 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 2058 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | } |
| 2060 | if (error) { |
| 2061 | ASSERT(committed); |
| 2062 | args->trans = NULL; |
| 2063 | xfs_bmap_cancel(args->flist); |
| 2064 | return(error); |
| 2065 | } |
| 2066 | |
| 2067 | /* |
| 2068 | * bmap_finish() may have committed the last trans and started |
| 2069 | * a new one. We need the inode to be in all transactions. |
| 2070 | */ |
| 2071 | if (committed) { |
| 2072 | xfs_trans_ijoin(args->trans, dp, XFS_ILOCK_EXCL); |
| 2073 | xfs_trans_ihold(args->trans, dp); |
| 2074 | } |
| 2075 | |
| 2076 | ASSERT(nmap == 1); |
| 2077 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 2078 | (map.br_startblock != HOLESTARTBLOCK)); |
| 2079 | lblkno += map.br_blockcount; |
| 2080 | blkcnt -= map.br_blockcount; |
| 2081 | |
| 2082 | /* |
| 2083 | * Start the next trans in the chain. |
| 2084 | */ |
| 2085 | if ((error = xfs_attr_rolltrans(&args->trans, dp))) |
| 2086 | return (error); |
| 2087 | } |
| 2088 | |
| 2089 | /* |
| 2090 | * Roll through the "value", copying the attribute value to the |
| 2091 | * already-allocated blocks. Blocks are written synchronously |
| 2092 | * so that we can know they are all on disk before we turn off |
| 2093 | * the INCOMPLETE flag. |
| 2094 | */ |
| 2095 | lblkno = args->rmtblkno; |
| 2096 | valuelen = args->valuelen; |
| 2097 | while (valuelen > 0) { |
| 2098 | /* |
| 2099 | * Try to remember where we decided to put the value. |
| 2100 | */ |
| 2101 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 2102 | nmap = 1; |
| 2103 | error = xfs_bmapi(NULL, dp, (xfs_fileoff_t)lblkno, |
| 2104 | args->rmtblkcnt, |
| 2105 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2106 | args->firstblock, 0, &map, &nmap, |
| 2107 | NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | if (error) { |
| 2109 | return(error); |
| 2110 | } |
| 2111 | ASSERT(nmap == 1); |
| 2112 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 2113 | (map.br_startblock != HOLESTARTBLOCK)); |
| 2114 | |
| 2115 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), |
| 2116 | blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
| 2117 | |
| 2118 | bp = xfs_buf_get_flags(mp->m_ddev_targp, dblkno, |
| 2119 | blkcnt, XFS_BUF_LOCK); |
| 2120 | ASSERT(bp); |
| 2121 | ASSERT(!XFS_BUF_GETERROR(bp)); |
| 2122 | |
| 2123 | tmp = (valuelen < XFS_BUF_SIZE(bp)) ? valuelen : |
| 2124 | XFS_BUF_SIZE(bp); |
| 2125 | xfs_biomove(bp, 0, tmp, src, XFS_B_WRITE); |
| 2126 | if (tmp < XFS_BUF_SIZE(bp)) |
| 2127 | xfs_biozero(bp, tmp, XFS_BUF_SIZE(bp) - tmp); |
| 2128 | if ((error = xfs_bwrite(mp, bp))) {/* GROT: NOTE: synchronous write */ |
| 2129 | return (error); |
| 2130 | } |
| 2131 | src += tmp; |
| 2132 | valuelen -= tmp; |
| 2133 | |
| 2134 | lblkno += map.br_blockcount; |
| 2135 | } |
| 2136 | ASSERT(valuelen == 0); |
| 2137 | return(0); |
| 2138 | } |
| 2139 | |
| 2140 | /* |
| 2141 | * Remove the value associated with an attribute by deleting the |
| 2142 | * out-of-line buffer that it is stored on. |
| 2143 | */ |
| 2144 | STATIC int |
| 2145 | xfs_attr_rmtval_remove(xfs_da_args_t *args) |
| 2146 | { |
| 2147 | xfs_mount_t *mp; |
| 2148 | xfs_bmbt_irec_t map; |
| 2149 | xfs_buf_t *bp; |
| 2150 | xfs_daddr_t dblkno; |
| 2151 | xfs_dablk_t lblkno; |
| 2152 | int valuelen, blkcnt, nmap, error, done, committed; |
| 2153 | |
| 2154 | mp = args->dp->i_mount; |
| 2155 | |
| 2156 | /* |
| 2157 | * Roll through the "value", invalidating the attribute value's |
| 2158 | * blocks. |
| 2159 | */ |
| 2160 | lblkno = args->rmtblkno; |
| 2161 | valuelen = args->rmtblkcnt; |
| 2162 | while (valuelen > 0) { |
| 2163 | /* |
| 2164 | * Try to remember where we decided to put the value. |
| 2165 | */ |
| 2166 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 2167 | nmap = 1; |
| 2168 | error = xfs_bmapi(NULL, args->dp, (xfs_fileoff_t)lblkno, |
| 2169 | args->rmtblkcnt, |
| 2170 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
| 2171 | args->firstblock, 0, &map, &nmap, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2172 | args->flist, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | if (error) { |
| 2174 | return(error); |
| 2175 | } |
| 2176 | ASSERT(nmap == 1); |
| 2177 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 2178 | (map.br_startblock != HOLESTARTBLOCK)); |
| 2179 | |
| 2180 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), |
| 2181 | blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
| 2182 | |
| 2183 | /* |
| 2184 | * If the "remote" value is in the cache, remove it. |
| 2185 | */ |
| 2186 | bp = xfs_incore(mp->m_ddev_targp, dblkno, blkcnt, |
| 2187 | XFS_INCORE_TRYLOCK); |
| 2188 | if (bp) { |
| 2189 | XFS_BUF_STALE(bp); |
| 2190 | XFS_BUF_UNDELAYWRITE(bp); |
| 2191 | xfs_buf_relse(bp); |
| 2192 | bp = NULL; |
| 2193 | } |
| 2194 | |
| 2195 | valuelen -= map.br_blockcount; |
| 2196 | |
| 2197 | lblkno += map.br_blockcount; |
| 2198 | } |
| 2199 | |
| 2200 | /* |
| 2201 | * Keep de-allocating extents until the remote-value region is gone. |
| 2202 | */ |
| 2203 | lblkno = args->rmtblkno; |
| 2204 | blkcnt = args->rmtblkcnt; |
| 2205 | done = 0; |
| 2206 | while (!done) { |
| 2207 | XFS_BMAP_INIT(args->flist, args->firstblock); |
| 2208 | error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt, |
| 2209 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2210 | 1, args->firstblock, args->flist, |
| 2211 | NULL, &done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | if (!error) { |
| 2213 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 2214 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | } |
| 2216 | if (error) { |
| 2217 | ASSERT(committed); |
| 2218 | args->trans = NULL; |
| 2219 | xfs_bmap_cancel(args->flist); |
| 2220 | return(error); |
| 2221 | } |
| 2222 | |
| 2223 | /* |
| 2224 | * bmap_finish() may have committed the last trans and started |
| 2225 | * a new one. We need the inode to be in all transactions. |
| 2226 | */ |
| 2227 | if (committed) { |
| 2228 | xfs_trans_ijoin(args->trans, args->dp, XFS_ILOCK_EXCL); |
| 2229 | xfs_trans_ihold(args->trans, args->dp); |
| 2230 | } |
| 2231 | |
| 2232 | /* |
| 2233 | * Close out trans and start the next one in the chain. |
| 2234 | */ |
| 2235 | if ((error = xfs_attr_rolltrans(&args->trans, args->dp))) |
| 2236 | return (error); |
| 2237 | } |
| 2238 | return(0); |
| 2239 | } |
| 2240 | |
| 2241 | #if defined(XFS_ATTR_TRACE) |
| 2242 | /* |
| 2243 | * Add a trace buffer entry for an attr_list context structure. |
| 2244 | */ |
| 2245 | void |
| 2246 | xfs_attr_trace_l_c(char *where, struct xfs_attr_list_context *context) |
| 2247 | { |
Eric Sandeen | 68f34d5 | 2008-05-20 15:11:17 +1000 | [diff] [blame] | 2248 | xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_C, where, context, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | (__psunsigned_t)NULL, |
| 2250 | (__psunsigned_t)NULL, |
| 2251 | (__psunsigned_t)NULL); |
| 2252 | } |
| 2253 | |
| 2254 | /* |
| 2255 | * Add a trace buffer entry for a context structure and a Btree node. |
| 2256 | */ |
| 2257 | void |
| 2258 | xfs_attr_trace_l_cn(char *where, struct xfs_attr_list_context *context, |
| 2259 | struct xfs_da_intnode *node) |
| 2260 | { |
Eric Sandeen | 68f34d5 | 2008-05-20 15:11:17 +1000 | [diff] [blame] | 2261 | xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CN, where, context, |
Nathan Scott | fac80cc | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 2262 | (__psunsigned_t)be16_to_cpu(node->hdr.count), |
Nathan Scott | 403432d | 2006-03-17 17:29:46 +1100 | [diff] [blame] | 2263 | (__psunsigned_t)be32_to_cpu(node->btree[0].hashval), |
Nathan Scott | fac80cc | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 2264 | (__psunsigned_t)be32_to_cpu(node->btree[ |
| 2265 | be16_to_cpu(node->hdr.count)-1].hashval)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2266 | } |
| 2267 | |
| 2268 | /* |
| 2269 | * Add a trace buffer entry for a context structure and a Btree element. |
| 2270 | */ |
| 2271 | void |
| 2272 | xfs_attr_trace_l_cb(char *where, struct xfs_attr_list_context *context, |
| 2273 | struct xfs_da_node_entry *btree) |
| 2274 | { |
Eric Sandeen | 68f34d5 | 2008-05-20 15:11:17 +1000 | [diff] [blame] | 2275 | xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CB, where, context, |
Nathan Scott | 403432d | 2006-03-17 17:29:46 +1100 | [diff] [blame] | 2276 | (__psunsigned_t)be32_to_cpu(btree->hashval), |
| 2277 | (__psunsigned_t)be32_to_cpu(btree->before), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | (__psunsigned_t)NULL); |
| 2279 | } |
| 2280 | |
| 2281 | /* |
| 2282 | * Add a trace buffer entry for a context structure and a leaf block. |
| 2283 | */ |
| 2284 | void |
| 2285 | xfs_attr_trace_l_cl(char *where, struct xfs_attr_list_context *context, |
| 2286 | struct xfs_attr_leafblock *leaf) |
| 2287 | { |
Eric Sandeen | 68f34d5 | 2008-05-20 15:11:17 +1000 | [diff] [blame] | 2288 | xfs_attr_trace_enter(XFS_ATTR_KTRACE_L_CL, where, context, |
Nathan Scott | 918ae42 | 2006-03-17 17:28:54 +1100 | [diff] [blame] | 2289 | (__psunsigned_t)be16_to_cpu(leaf->hdr.count), |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 2290 | (__psunsigned_t)be32_to_cpu(leaf->entries[0].hashval), |
| 2291 | (__psunsigned_t)be32_to_cpu(leaf->entries[ |
| 2292 | be16_to_cpu(leaf->hdr.count)-1].hashval)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | } |
| 2294 | |
| 2295 | /* |
| 2296 | * Add a trace buffer entry for the arguments given to the routine, |
| 2297 | * generic form. |
| 2298 | */ |
| 2299 | void |
| 2300 | xfs_attr_trace_enter(int type, char *where, |
Eric Sandeen | 68f34d5 | 2008-05-20 15:11:17 +1000 | [diff] [blame] | 2301 | struct xfs_attr_list_context *context, |
| 2302 | __psunsigned_t a13, __psunsigned_t a14, |
| 2303 | __psunsigned_t a15) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | { |
| 2305 | ASSERT(xfs_attr_trace_buf); |
| 2306 | ktrace_enter(xfs_attr_trace_buf, (void *)((__psunsigned_t)type), |
Eric Sandeen | 68f34d5 | 2008-05-20 15:11:17 +1000 | [diff] [blame] | 2307 | (void *)((__psunsigned_t)where), |
| 2308 | (void *)((__psunsigned_t)context->dp), |
| 2309 | (void *)((__psunsigned_t)context->cursor->hashval), |
| 2310 | (void *)((__psunsigned_t)context->cursor->blkno), |
| 2311 | (void *)((__psunsigned_t)context->cursor->offset), |
| 2312 | (void *)((__psunsigned_t)context->alist), |
| 2313 | (void *)((__psunsigned_t)context->bufsize), |
| 2314 | (void *)((__psunsigned_t)context->count), |
| 2315 | (void *)((__psunsigned_t)context->firstu), |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 2316 | NULL, |
Eric Sandeen | 68f34d5 | 2008-05-20 15:11:17 +1000 | [diff] [blame] | 2317 | (void *)((__psunsigned_t)context->dupcnt), |
| 2318 | (void *)((__psunsigned_t)context->flags), |
| 2319 | (void *)a13, (void *)a14, (void *)a15); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | } |
| 2321 | #endif /* XFS_ATTR_TRACE */ |