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_mount.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 29 | #include "xfs_da_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 31 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_dinode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 34 | #include "xfs_alloc.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 35 | #include "xfs_inode_item.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_attr.h" |
| 38 | #include "xfs_attr_leaf.h" |
| 39 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include "xfs_quota.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include "xfs_trans_space.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 42 | #include "xfs_rw.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 43 | #include "xfs_vnodeops.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 44 | #include "xfs_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | /* |
| 47 | * xfs_attr.c |
| 48 | * |
| 49 | * Provide the external interfaces to manage attribute lists. |
| 50 | */ |
| 51 | |
| 52 | /*======================================================================== |
| 53 | * Function prototypes for the kernel. |
| 54 | *========================================================================*/ |
| 55 | |
| 56 | /* |
| 57 | * Internal routines when attribute list fits inside the inode. |
| 58 | */ |
| 59 | STATIC int xfs_attr_shortform_addname(xfs_da_args_t *args); |
| 60 | |
| 61 | /* |
| 62 | * Internal routines when attribute list is one block. |
| 63 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 64 | STATIC int xfs_attr_leaf_get(xfs_da_args_t *args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | STATIC int xfs_attr_leaf_addname(xfs_da_args_t *args); |
| 66 | STATIC int xfs_attr_leaf_removename(xfs_da_args_t *args); |
| 67 | STATIC int xfs_attr_leaf_list(xfs_attr_list_context_t *context); |
| 68 | |
| 69 | /* |
| 70 | * Internal routines when attribute list is more than one block. |
| 71 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 72 | STATIC int xfs_attr_node_get(xfs_da_args_t *args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | STATIC int xfs_attr_node_addname(xfs_da_args_t *args); |
| 74 | STATIC int xfs_attr_node_removename(xfs_da_args_t *args); |
| 75 | STATIC int xfs_attr_node_list(xfs_attr_list_context_t *context); |
| 76 | STATIC int xfs_attr_fillstate(xfs_da_state_t *state); |
| 77 | STATIC int xfs_attr_refillstate(xfs_da_state_t *state); |
| 78 | |
| 79 | /* |
| 80 | * Routines to manipulate out-of-line attribute values. |
| 81 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | STATIC int xfs_attr_rmtval_set(xfs_da_args_t *args); |
| 83 | STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args); |
| 84 | |
| 85 | #define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */ |
| 86 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 87 | STATIC int |
| 88 | xfs_attr_name_to_xname( |
| 89 | struct xfs_name *xname, |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 90 | const unsigned char *aname) |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 91 | { |
| 92 | if (!aname) |
| 93 | return EINVAL; |
| 94 | xname->name = aname; |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 95 | xname->len = strlen((char *)aname); |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 96 | if (xname->len >= MAXNAMELEN) |
| 97 | return EFAULT; /* match IRIX behaviour */ |
| 98 | |
| 99 | return 0; |
| 100 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 102 | STATIC int |
| 103 | xfs_inode_hasattr( |
| 104 | struct xfs_inode *ip) |
| 105 | { |
| 106 | if (!XFS_IFORK_Q(ip) || |
| 107 | (ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS && |
| 108 | ip->i_d.di_anextents == 0)) |
| 109 | return 0; |
| 110 | return 1; |
| 111 | } |
| 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | /*======================================================================== |
| 114 | * Overall external interface routines. |
| 115 | *========================================================================*/ |
| 116 | |
Christoph Hellwig | e82fa0c | 2009-11-14 16:17:20 +0000 | [diff] [blame] | 117 | STATIC int |
| 118 | xfs_attr_get_int( |
| 119 | struct xfs_inode *ip, |
| 120 | struct xfs_name *name, |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 121 | unsigned char *value, |
Christoph Hellwig | e82fa0c | 2009-11-14 16:17:20 +0000 | [diff] [blame] | 122 | int *valuelenp, |
| 123 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | { |
| 125 | xfs_da_args_t args; |
| 126 | int error; |
| 127 | |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 128 | if (!xfs_inode_hasattr(ip)) |
| 129 | return ENOATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | /* |
| 132 | * Fill in the arg structure for this request. |
| 133 | */ |
| 134 | memset((char *)&args, 0, sizeof(args)); |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 135 | args.name = name->name; |
| 136 | args.namelen = name->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | args.value = value; |
| 138 | args.valuelen = *valuelenp; |
| 139 | args.flags = flags; |
| 140 | args.hashval = xfs_da_hashname(args.name, args.namelen); |
| 141 | args.dp = ip; |
| 142 | args.whichfork = XFS_ATTR_FORK; |
| 143 | |
| 144 | /* |
| 145 | * Decide on what work routines to call based on the inode size. |
| 146 | */ |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 147 | if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | error = xfs_attr_shortform_getvalue(&args); |
| 149 | } else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK)) { |
| 150 | error = xfs_attr_leaf_get(&args); |
| 151 | } else { |
| 152 | error = xfs_attr_node_get(&args); |
| 153 | } |
| 154 | |
| 155 | /* |
| 156 | * Return the number of bytes in the value to the caller. |
| 157 | */ |
| 158 | *valuelenp = args.valuelen; |
| 159 | |
| 160 | if (error == EEXIST) |
| 161 | error = 0; |
| 162 | return(error); |
| 163 | } |
| 164 | |
| 165 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 166 | xfs_attr_get( |
| 167 | xfs_inode_t *ip, |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 168 | const unsigned char *name, |
| 169 | unsigned char *value, |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 170 | int *valuelenp, |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 171 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | { |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 173 | int error; |
| 174 | struct xfs_name xname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
| 176 | XFS_STATS_INC(xs_attr_get); |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| 179 | return(EIO); |
| 180 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 181 | error = xfs_attr_name_to_xname(&xname, name); |
| 182 | if (error) |
| 183 | return error; |
| 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
Christoph Hellwig | e82fa0c | 2009-11-14 16:17:20 +0000 | [diff] [blame] | 186 | error = xfs_attr_get_int(ip, &xname, value, valuelenp, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 188 | return(error); |
| 189 | } |
| 190 | |
Niv Sardi | 5e9da7b | 2008-08-13 16:03:35 +1000 | [diff] [blame] | 191 | /* |
| 192 | * Calculate how many blocks we need for the new attribute, |
| 193 | */ |
Eric Sandeen | 5d77c0d | 2009-11-19 15:52:00 +0000 | [diff] [blame] | 194 | STATIC int |
Niv Sardi | 5e9da7b | 2008-08-13 16:03:35 +1000 | [diff] [blame] | 195 | xfs_attr_calc_size( |
| 196 | struct xfs_inode *ip, |
| 197 | int namelen, |
| 198 | int valuelen, |
| 199 | int *local) |
| 200 | { |
| 201 | struct xfs_mount *mp = ip->i_mount; |
| 202 | int size; |
| 203 | int nblks; |
| 204 | |
| 205 | /* |
| 206 | * Determine space new attribute will use, and if it would be |
| 207 | * "local" or "remote" (note: local != inline). |
| 208 | */ |
| 209 | size = xfs_attr_leaf_newentsize(namelen, valuelen, |
| 210 | mp->m_sb.sb_blocksize, local); |
| 211 | |
| 212 | nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK); |
| 213 | if (*local) { |
| 214 | if (size > (mp->m_sb.sb_blocksize >> 1)) { |
| 215 | /* Double split possible */ |
| 216 | nblks *= 2; |
| 217 | } |
| 218 | } else { |
| 219 | /* |
| 220 | * Out of line attribute, cannot double split, but |
| 221 | * make room for the attribute value itself. |
| 222 | */ |
| 223 | uint dblocks = XFS_B_TO_FSB(mp, valuelen); |
| 224 | nblks += dblocks; |
| 225 | nblks += XFS_NEXTENTADD_SPACE_RES(mp, dblocks, XFS_ATTR_FORK); |
| 226 | } |
| 227 | |
| 228 | return nblks; |
| 229 | } |
| 230 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 231 | STATIC int |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 232 | xfs_attr_set_int( |
| 233 | struct xfs_inode *dp, |
| 234 | struct xfs_name *name, |
| 235 | unsigned char *value, |
| 236 | int valuelen, |
| 237 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | { |
| 239 | xfs_da_args_t args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | xfs_fsblock_t firstblock; |
| 241 | xfs_bmap_free_t flist; |
| 242 | int error, err2, committed; |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 243 | xfs_mount_t *mp = dp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | int rsvd = (flags & ATTR_ROOT) != 0; |
Niv Sardi | 5e9da7b | 2008-08-13 16:03:35 +1000 | [diff] [blame] | 245 | int local; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | /* |
| 248 | * Attach the dquots to the inode. |
| 249 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 250 | error = xfs_qm_dqattach(dp, 0); |
| 251 | if (error) |
| 252 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | /* |
| 255 | * If the inode doesn't have an attribute fork, add one. |
| 256 | * (inode must not be locked when we call this routine) |
| 257 | */ |
| 258 | if (XFS_IFORK_Q(dp) == 0) { |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 259 | int sf_size = sizeof(xfs_attr_sf_hdr_t) + |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 260 | XFS_ATTR_SF_ENTSIZE_BYNAME(name->len, valuelen); |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 261 | |
| 262 | if ((error = xfs_bmap_add_attrfork(dp, sf_size, rsvd))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | return(error); |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * Fill in the arg structure for this request. |
| 268 | */ |
| 269 | memset((char *)&args, 0, sizeof(args)); |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 270 | args.name = name->name; |
| 271 | args.namelen = name->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | args.value = value; |
| 273 | args.valuelen = valuelen; |
| 274 | args.flags = flags; |
| 275 | args.hashval = xfs_da_hashname(args.name, args.namelen); |
| 276 | args.dp = dp; |
| 277 | args.firstblock = &firstblock; |
| 278 | args.flist = &flist; |
| 279 | args.whichfork = XFS_ATTR_FORK; |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 280 | args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | /* Size is now blocks for attribute data */ |
Niv Sardi | 5e9da7b | 2008-08-13 16:03:35 +1000 | [diff] [blame] | 283 | args.total = xfs_attr_calc_size(dp, name->len, valuelen, &local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
| 285 | /* |
| 286 | * Start our first transaction of the day. |
| 287 | * |
| 288 | * All future transactions during this code must be "chained" off |
| 289 | * this one via the trans_dup() call. All transactions will contain |
| 290 | * the inode, and the inode will always be marked with trans_ihold(). |
| 291 | * Since the inode will be locked in all transactions, we must log |
| 292 | * the inode in every transaction to let it float upward through |
| 293 | * the log. |
| 294 | */ |
| 295 | args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_SET); |
| 296 | |
| 297 | /* |
| 298 | * Root fork attributes can use reserved data blocks for this |
| 299 | * operation if necessary |
| 300 | */ |
| 301 | |
| 302 | if (rsvd) |
| 303 | args.trans->t_flags |= XFS_TRANS_RESERVE; |
| 304 | |
Niv Sardi | 5e9da7b | 2008-08-13 16:03:35 +1000 | [diff] [blame] | 305 | if ((error = xfs_trans_reserve(args.trans, args.total, |
| 306 | XFS_ATTRSET_LOG_RES(mp, args.total), 0, |
| 307 | XFS_TRANS_PERM_LOG_RES, XFS_ATTRSET_LOG_COUNT))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | xfs_trans_cancel(args.trans, 0); |
| 309 | return(error); |
| 310 | } |
| 311 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 312 | |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 313 | error = xfs_trans_reserve_quota_nblks(args.trans, dp, args.total, 0, |
Niv Sardi | 5e9da7b | 2008-08-13 16:03:35 +1000 | [diff] [blame] | 314 | rsvd ? XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : |
| 315 | XFS_QMOPT_RES_REGBLKS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | if (error) { |
| 317 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 318 | xfs_trans_cancel(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
| 319 | return (error); |
| 320 | } |
| 321 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 322 | xfs_trans_ijoin(args.trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 325 | * If the attribute list is non-existent or a shortform list, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | * upgrade it to a single-leaf-block attribute list. |
| 327 | */ |
| 328 | if ((dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) || |
| 329 | ((dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) && |
| 330 | (dp->i_d.di_anextents == 0))) { |
| 331 | |
| 332 | /* |
| 333 | * Build initial attribute list (if required). |
| 334 | */ |
| 335 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 336 | xfs_attr_shortform_create(&args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | /* |
| 339 | * Try to add the attr to the attribute list in |
| 340 | * the inode. |
| 341 | */ |
| 342 | error = xfs_attr_shortform_addname(&args); |
| 343 | if (error != ENOSPC) { |
| 344 | /* |
| 345 | * Commit the shortform mods, and we're done. |
| 346 | * NOTE: this is also the error path (EEXIST, etc). |
| 347 | */ |
| 348 | ASSERT(args.trans != NULL); |
| 349 | |
| 350 | /* |
| 351 | * If this is a synchronous mount, make sure that |
| 352 | * the transaction goes to disk before returning |
| 353 | * to the user. |
| 354 | */ |
| 355 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 356 | xfs_trans_set_sync(args.trans); |
| 357 | } |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 358 | |
| 359 | if (!error && (flags & ATTR_KERNOTIME) == 0) { |
| 360 | xfs_trans_ichgtime(args.trans, dp, |
| 361 | XFS_ICHGTIME_CHG); |
| 362 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | err2 = xfs_trans_commit(args.trans, |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 364 | XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | return(error == 0 ? err2 : error); |
| 368 | } |
| 369 | |
| 370 | /* |
| 371 | * It won't fit in the shortform, transform to a leaf block. |
| 372 | * GROT: another possible req'mt for a double-split btree op. |
| 373 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 374 | xfs_bmap_init(args.flist, args.firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | error = xfs_attr_shortform_to_leaf(&args); |
| 376 | if (!error) { |
| 377 | error = xfs_bmap_finish(&args.trans, args.flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 378 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | } |
| 380 | if (error) { |
| 381 | ASSERT(committed); |
| 382 | args.trans = NULL; |
| 383 | xfs_bmap_cancel(&flist); |
| 384 | goto out; |
| 385 | } |
| 386 | |
| 387 | /* |
| 388 | * bmap_finish() may have committed the last trans and started |
| 389 | * a new one. We need the inode to be in all transactions. |
| 390 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 391 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 392 | xfs_trans_ijoin(args.trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
| 394 | /* |
| 395 | * Commit the leaf transformation. We'll need another (linked) |
| 396 | * transaction to add the new attribute to the leaf. |
| 397 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 398 | |
| 399 | error = xfs_trans_roll(&args.trans, dp); |
| 400 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | goto out; |
| 402 | |
| 403 | } |
| 404 | |
| 405 | if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 406 | error = xfs_attr_leaf_addname(&args); |
| 407 | } else { |
| 408 | error = xfs_attr_node_addname(&args); |
| 409 | } |
| 410 | if (error) { |
| 411 | goto out; |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * If this is a synchronous mount, make sure that the |
| 416 | * transaction goes to disk before returning to the user. |
| 417 | */ |
| 418 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 419 | xfs_trans_set_sync(args.trans); |
| 420 | } |
| 421 | |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 422 | if ((flags & ATTR_KERNOTIME) == 0) |
| 423 | xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG); |
| 424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | /* |
| 426 | * Commit the last in the sequence of transactions. |
| 427 | */ |
| 428 | xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 429 | error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | return(error); |
| 433 | |
| 434 | out: |
| 435 | if (args.trans) |
| 436 | xfs_trans_cancel(args.trans, |
| 437 | XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 438 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 439 | return(error); |
| 440 | } |
| 441 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 442 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 443 | xfs_attr_set( |
| 444 | xfs_inode_t *dp, |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 445 | const unsigned char *name, |
| 446 | unsigned char *value, |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 447 | int valuelen, |
| 448 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | { |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 450 | int error; |
| 451 | struct xfs_name xname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 453 | XFS_STATS_INC(xs_attr_set); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 455 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | return (EIO); |
| 457 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 458 | error = xfs_attr_name_to_xname(&xname, name); |
| 459 | if (error) |
| 460 | return error; |
| 461 | |
| 462 | return xfs_attr_set_int(dp, &xname, value, valuelen, flags); |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | /* |
| 466 | * Generic handler routine to remove a name from an attribute list. |
| 467 | * Transitions attribute list from Btree to shortform as necessary. |
| 468 | */ |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 469 | STATIC int |
| 470 | 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] | 471 | { |
| 472 | xfs_da_args_t args; |
| 473 | xfs_fsblock_t firstblock; |
| 474 | xfs_bmap_free_t flist; |
| 475 | int error; |
| 476 | xfs_mount_t *mp = dp->i_mount; |
| 477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | /* |
| 479 | * Fill in the arg structure for this request. |
| 480 | */ |
| 481 | memset((char *)&args, 0, sizeof(args)); |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 482 | args.name = name->name; |
| 483 | args.namelen = name->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | args.flags = flags; |
| 485 | args.hashval = xfs_da_hashname(args.name, args.namelen); |
| 486 | args.dp = dp; |
| 487 | args.firstblock = &firstblock; |
| 488 | args.flist = &flist; |
| 489 | args.total = 0; |
| 490 | args.whichfork = XFS_ATTR_FORK; |
| 491 | |
| 492 | /* |
Dave Chinner | 4a33821 | 2011-06-23 01:35:01 +0000 | [diff] [blame] | 493 | * we have no control over the attribute names that userspace passes us |
| 494 | * to remove, so we have to allow the name lookup prior to attribute |
| 495 | * removal to fail. |
| 496 | */ |
| 497 | args.op_flags = XFS_DA_OP_OKNOENT; |
| 498 | |
| 499 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | * Attach the dquots to the inode. |
| 501 | */ |
Christoph Hellwig | 7d09525 | 2009-06-08 15:33:32 +0200 | [diff] [blame] | 502 | error = xfs_qm_dqattach(dp, 0); |
| 503 | if (error) |
| 504 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | |
| 506 | /* |
| 507 | * Start our first transaction of the day. |
| 508 | * |
| 509 | * All future transactions during this code must be "chained" off |
| 510 | * this one via the trans_dup() call. All transactions will contain |
| 511 | * the inode, and the inode will always be marked with trans_ihold(). |
| 512 | * Since the inode will be locked in all transactions, we must log |
| 513 | * the inode in every transaction to let it float upward through |
| 514 | * the log. |
| 515 | */ |
| 516 | args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_RM); |
| 517 | |
| 518 | /* |
| 519 | * Root fork attributes can use reserved data blocks for this |
| 520 | * operation if necessary |
| 521 | */ |
| 522 | |
| 523 | if (flags & ATTR_ROOT) |
| 524 | args.trans->t_flags |= XFS_TRANS_RESERVE; |
| 525 | |
| 526 | if ((error = xfs_trans_reserve(args.trans, |
| 527 | XFS_ATTRRM_SPACE_RES(mp), |
| 528 | XFS_ATTRRM_LOG_RES(mp), |
| 529 | 0, XFS_TRANS_PERM_LOG_RES, |
| 530 | XFS_ATTRRM_LOG_COUNT))) { |
| 531 | xfs_trans_cancel(args.trans, 0); |
| 532 | return(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 536 | /* |
| 537 | * No need to make quota reservations here. We expect to release some |
| 538 | * blocks not allocate in the common case. |
| 539 | */ |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 540 | xfs_trans_ijoin(args.trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | |
| 542 | /* |
| 543 | * Decide on what work routines to call based on the inode size. |
| 544 | */ |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 545 | if (!xfs_inode_hasattr(dp)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | error = XFS_ERROR(ENOATTR); |
| 547 | goto out; |
| 548 | } |
| 549 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
| 550 | ASSERT(dp->i_afp->if_flags & XFS_IFINLINE); |
| 551 | error = xfs_attr_shortform_remove(&args); |
| 552 | if (error) { |
| 553 | goto out; |
| 554 | } |
| 555 | } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 556 | error = xfs_attr_leaf_removename(&args); |
| 557 | } else { |
| 558 | error = xfs_attr_node_removename(&args); |
| 559 | } |
| 560 | if (error) { |
| 561 | goto out; |
| 562 | } |
| 563 | |
| 564 | /* |
| 565 | * If this is a synchronous mount, make sure that the |
| 566 | * transaction goes to disk before returning to the user. |
| 567 | */ |
| 568 | if (mp->m_flags & XFS_MOUNT_WSYNC) { |
| 569 | xfs_trans_set_sync(args.trans); |
| 570 | } |
| 571 | |
Dave Chinner | dcd79a1 | 2010-09-28 12:27:25 +1000 | [diff] [blame] | 572 | if ((flags & ATTR_KERNOTIME) == 0) |
| 573 | xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG); |
| 574 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | /* |
| 576 | * Commit the last in the sequence of transactions. |
| 577 | */ |
| 578 | xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE); |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 579 | error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | return(error); |
| 583 | |
| 584 | out: |
| 585 | if (args.trans) |
| 586 | xfs_trans_cancel(args.trans, |
| 587 | XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 588 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 589 | return(error); |
| 590 | } |
| 591 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 592 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 593 | xfs_attr_remove( |
| 594 | xfs_inode_t *dp, |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 595 | const unsigned char *name, |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 596 | int flags) |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 597 | { |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 598 | int error; |
| 599 | struct xfs_name xname; |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 600 | |
| 601 | XFS_STATS_INC(xs_attr_remove); |
| 602 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 603 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| 604 | return (EIO); |
| 605 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 606 | error = xfs_attr_name_to_xname(&xname, name); |
| 607 | if (error) |
| 608 | return error; |
| 609 | |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 610 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 611 | if (!xfs_inode_hasattr(dp)) { |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 612 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 613 | return XFS_ERROR(ENOATTR); |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 614 | } |
| 615 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 616 | |
Barry Naujok | e8b0eba | 2008-04-22 17:34:31 +1000 | [diff] [blame] | 617 | return xfs_attr_remove_int(dp, &xname, flags); |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 618 | } |
| 619 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 620 | int |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 621 | xfs_attr_list_int(xfs_attr_list_context_t *context) |
| 622 | { |
| 623 | int error; |
| 624 | xfs_inode_t *dp = context->dp; |
| 625 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 626 | XFS_STATS_INC(xs_attr_list); |
| 627 | |
| 628 | if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| 629 | return EIO; |
| 630 | |
| 631 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 632 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 633 | /* |
| 634 | * Decide on what work routines to call based on the inode size. |
| 635 | */ |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 636 | if (!xfs_inode_hasattr(dp)) { |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 637 | error = 0; |
| 638 | } else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
| 639 | error = xfs_attr_shortform_list(context); |
| 640 | } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 641 | error = xfs_attr_leaf_list(context); |
| 642 | } else { |
| 643 | error = xfs_attr_node_list(context); |
| 644 | } |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 645 | |
| 646 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 647 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 648 | return error; |
| 649 | } |
| 650 | |
| 651 | #define ATTR_ENTBASESIZE /* minimum bytes used by an attr */ \ |
| 652 | (((struct attrlist_ent *) 0)->a_name - (char *) 0) |
| 653 | #define ATTR_ENTSIZE(namelen) /* actual bytes used by an attr */ \ |
| 654 | ((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(u_int32_t)-1) \ |
| 655 | & ~(sizeof(u_int32_t)-1)) |
| 656 | |
| 657 | /* |
| 658 | * Format an attribute and copy it out to the user's buffer. |
| 659 | * Take care to check values and protect against them changing later, |
| 660 | * we may be reading them directly out of a user buffer. |
| 661 | */ |
| 662 | /*ARGSUSED*/ |
| 663 | STATIC int |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 664 | xfs_attr_put_listent( |
| 665 | xfs_attr_list_context_t *context, |
| 666 | int flags, |
| 667 | unsigned char *name, |
| 668 | int namelen, |
| 669 | int valuelen, |
| 670 | unsigned char *value) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 671 | { |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 672 | struct attrlist *alist = (struct attrlist *)context->alist; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 673 | attrlist_ent_t *aep; |
| 674 | int arraytop; |
| 675 | |
| 676 | ASSERT(!(context->flags & ATTR_KERNOVAL)); |
| 677 | ASSERT(context->count >= 0); |
| 678 | ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 679 | ASSERT(context->firstu >= sizeof(*alist)); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 680 | ASSERT(context->firstu <= context->bufsize); |
| 681 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 682 | /* |
| 683 | * Only list entries in the right namespace. |
| 684 | */ |
| 685 | if (((context->flags & ATTR_SECURE) == 0) != |
| 686 | ((flags & XFS_ATTR_SECURE) == 0)) |
| 687 | return 0; |
| 688 | if (((context->flags & ATTR_ROOT) == 0) != |
| 689 | ((flags & XFS_ATTR_ROOT) == 0)) |
| 690 | return 0; |
| 691 | |
| 692 | arraytop = sizeof(*alist) + |
| 693 | context->count * sizeof(alist->al_offset[0]); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 694 | context->firstu -= ATTR_ENTSIZE(namelen); |
| 695 | if (context->firstu < arraytop) { |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 696 | trace_xfs_attr_list_full(context); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 697 | alist->al_more = 1; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 698 | context->seen_enough = 1; |
| 699 | return 1; |
| 700 | } |
| 701 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 702 | aep = (attrlist_ent_t *)&context->alist[context->firstu]; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 703 | aep->a_valuelen = valuelen; |
| 704 | memcpy(aep->a_name, name, namelen); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 705 | aep->a_name[namelen] = 0; |
| 706 | alist->al_offset[context->count++] = context->firstu; |
| 707 | alist->al_count = context->count; |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 708 | trace_xfs_attr_list_add(context); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 709 | return 0; |
| 710 | } |
| 711 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | /* |
| 713 | * Generate a list of extended attribute names and optionally |
| 714 | * also value lengths. Positive return value follows the XFS |
| 715 | * convention of being an error, zero or negative return code |
| 716 | * is the length of the buffer returned (negated), indicating |
| 717 | * success. |
| 718 | */ |
| 719 | int |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 720 | xfs_attr_list( |
| 721 | xfs_inode_t *dp, |
| 722 | char *buffer, |
| 723 | int bufsize, |
| 724 | int flags, |
| 725 | attrlist_cursor_kern_t *cursor) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | { |
| 727 | xfs_attr_list_context_t context; |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 728 | struct attrlist *alist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | int error; |
| 730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | /* |
| 732 | * Validate the cursor. |
| 733 | */ |
| 734 | if (cursor->pad1 || cursor->pad2) |
| 735 | return(XFS_ERROR(EINVAL)); |
| 736 | if ((cursor->initted == 0) && |
| 737 | (cursor->hashval || cursor->blkno || cursor->offset)) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 738 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | |
| 740 | /* |
| 741 | * Check for a properly aligned buffer. |
| 742 | */ |
| 743 | if (((long)buffer) & (sizeof(int)-1)) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 744 | return XFS_ERROR(EFAULT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | if (flags & ATTR_KERNOVAL) |
| 746 | bufsize = 0; |
| 747 | |
| 748 | /* |
| 749 | * Initialize the output buffer. |
| 750 | */ |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 751 | memset(&context, 0, sizeof(context)); |
Christoph Hellwig | 993386c | 2007-08-28 16:12:30 +1000 | [diff] [blame] | 752 | context.dp = dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | context.cursor = cursor; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | context.resynch = 1; |
| 755 | context.flags = flags; |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 756 | context.alist = buffer; |
| 757 | context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */ |
| 758 | context.firstu = context.bufsize; |
| 759 | context.put_listent = xfs_attr_put_listent; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 760 | |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 761 | alist = (struct attrlist *)context.alist; |
| 762 | alist->al_count = 0; |
| 763 | alist->al_more = 0; |
| 764 | alist->al_offset[0] = context.bufsize; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 765 | |
| 766 | error = xfs_attr_list_int(&context); |
Christoph Hellwig | ad9b463 | 2008-06-23 13:23:48 +1000 | [diff] [blame] | 767 | ASSERT(error >= 0); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 768 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | } |
| 770 | |
| 771 | int /* error */ |
| 772 | xfs_attr_inactive(xfs_inode_t *dp) |
| 773 | { |
| 774 | xfs_trans_t *trans; |
| 775 | xfs_mount_t *mp; |
| 776 | int error; |
| 777 | |
| 778 | mp = dp->i_mount; |
| 779 | ASSERT(! XFS_NOT_DQATTACHED(mp, dp)); |
| 780 | |
| 781 | xfs_ilock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 782 | if (!xfs_inode_hasattr(dp) || |
| 783 | dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 785 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | } |
| 787 | xfs_iunlock(dp, XFS_ILOCK_SHARED); |
| 788 | |
| 789 | /* |
| 790 | * Start our first transaction of the day. |
| 791 | * |
| 792 | * All future transactions during this code must be "chained" off |
| 793 | * this one via the trans_dup() call. All transactions will contain |
| 794 | * the inode, and the inode will always be marked with trans_ihold(). |
| 795 | * Since the inode will be locked in all transactions, we must log |
| 796 | * the inode in every transaction to let it float upward through |
| 797 | * the log. |
| 798 | */ |
| 799 | trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL); |
| 800 | if ((error = xfs_trans_reserve(trans, 0, XFS_ATTRINVAL_LOG_RES(mp), 0, |
| 801 | XFS_TRANS_PERM_LOG_RES, |
| 802 | XFS_ATTRINVAL_LOG_COUNT))) { |
| 803 | xfs_trans_cancel(trans, 0); |
| 804 | return(error); |
| 805 | } |
| 806 | xfs_ilock(dp, XFS_ILOCK_EXCL); |
| 807 | |
| 808 | /* |
| 809 | * No need to make quota reservations here. We expect to release some |
| 810 | * blocks, not allocate, in the common case. |
| 811 | */ |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 812 | xfs_trans_ijoin(trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
| 814 | /* |
| 815 | * Decide on what work routines to call based on the inode size. |
| 816 | */ |
Christoph Hellwig | caf8aab | 2008-06-23 13:23:41 +1000 | [diff] [blame] | 817 | if (!xfs_inode_hasattr(dp) || |
| 818 | dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | error = 0; |
| 820 | goto out; |
| 821 | } |
| 822 | error = xfs_attr_root_inactive(&trans, dp); |
| 823 | if (error) |
| 824 | goto out; |
Christoph Hellwig | 8f04c47 | 2011-07-08 14:34:34 +0200 | [diff] [blame] | 825 | |
Christoph Hellwig | 8f04c47 | 2011-07-08 14:34:34 +0200 | [diff] [blame] | 826 | error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0); |
| 827 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | goto out; |
| 829 | |
Eric Sandeen | 1c72bf9 | 2007-05-08 13:48:42 +1000 | [diff] [blame] | 830 | error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 832 | |
| 833 | return(error); |
| 834 | |
| 835 | out: |
| 836 | xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| 837 | xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| 838 | return(error); |
| 839 | } |
| 840 | |
| 841 | |
| 842 | |
| 843 | /*======================================================================== |
| 844 | * External routines when attribute list is inside the inode |
| 845 | *========================================================================*/ |
| 846 | |
| 847 | /* |
| 848 | * Add a name to the shortform attribute list structure |
| 849 | * This is the external routine. |
| 850 | */ |
| 851 | STATIC int |
| 852 | xfs_attr_shortform_addname(xfs_da_args_t *args) |
| 853 | { |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 854 | int newsize, forkoff, retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
| 856 | retval = xfs_attr_shortform_lookup(args); |
| 857 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { |
| 858 | return(retval); |
| 859 | } else if (retval == EEXIST) { |
| 860 | if (args->flags & ATTR_CREATE) |
| 861 | return(retval); |
| 862 | retval = xfs_attr_shortform_remove(args); |
| 863 | ASSERT(retval == 0); |
| 864 | } |
| 865 | |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 866 | if (args->namelen >= XFS_ATTR_SF_ENTSIZE_MAX || |
| 867 | args->valuelen >= XFS_ATTR_SF_ENTSIZE_MAX) |
| 868 | return(XFS_ERROR(ENOSPC)); |
| 869 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | newsize = XFS_ATTR_SF_TOTSIZE(args->dp); |
| 871 | newsize += XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 872 | |
| 873 | forkoff = xfs_attr_shortform_bytesfit(args->dp, newsize); |
| 874 | if (!forkoff) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | return(XFS_ERROR(ENOSPC)); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 876 | |
| 877 | xfs_attr_shortform_add(args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | return(0); |
| 879 | } |
| 880 | |
| 881 | |
| 882 | /*======================================================================== |
| 883 | * External routines when attribute list is one block |
| 884 | *========================================================================*/ |
| 885 | |
| 886 | /* |
| 887 | * Add a name to the leaf attribute list structure |
| 888 | * |
| 889 | * This leaf block cannot have a "remote" value, we only call this routine |
| 890 | * if bmap_one_block() says there is only one block (ie: no remote blks). |
| 891 | */ |
David Chinner | a8272ce | 2007-11-23 16:28:09 +1100 | [diff] [blame] | 892 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | xfs_attr_leaf_addname(xfs_da_args_t *args) |
| 894 | { |
| 895 | xfs_inode_t *dp; |
| 896 | xfs_dabuf_t *bp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 897 | int retval, error, committed, forkoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | |
| 899 | /* |
| 900 | * Read the (only) block in the attribute list in. |
| 901 | */ |
| 902 | dp = args->dp; |
| 903 | args->blkno = 0; |
| 904 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, |
| 905 | XFS_ATTR_FORK); |
| 906 | if (error) |
| 907 | return(error); |
| 908 | ASSERT(bp != NULL); |
| 909 | |
| 910 | /* |
| 911 | * Look up the given attribute in the leaf block. Figure out if |
| 912 | * the given flags produce an error or call for an atomic rename. |
| 913 | */ |
| 914 | retval = xfs_attr_leaf_lookup_int(bp, args); |
| 915 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { |
| 916 | xfs_da_brelse(args->trans, bp); |
| 917 | return(retval); |
| 918 | } else if (retval == EEXIST) { |
| 919 | if (args->flags & ATTR_CREATE) { /* pure create op */ |
| 920 | xfs_da_brelse(args->trans, bp); |
| 921 | return(retval); |
| 922 | } |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 923 | args->op_flags |= XFS_DA_OP_RENAME; /* an atomic rename */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | args->blkno2 = args->blkno; /* set 2nd entry info*/ |
| 925 | args->index2 = args->index; |
| 926 | args->rmtblkno2 = args->rmtblkno; |
| 927 | args->rmtblkcnt2 = args->rmtblkcnt; |
| 928 | } |
| 929 | |
| 930 | /* |
| 931 | * Add the attribute to the leaf block, transitioning to a Btree |
| 932 | * if required. |
| 933 | */ |
| 934 | retval = xfs_attr_leaf_add(bp, args); |
| 935 | xfs_da_buf_done(bp); |
| 936 | if (retval == ENOSPC) { |
| 937 | /* |
| 938 | * Promote the attribute list to the Btree format, then |
| 939 | * Commit that transaction so that the node_addname() call |
| 940 | * can manage its own transactions. |
| 941 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 942 | xfs_bmap_init(args->flist, args->firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | error = xfs_attr_leaf_to_node(args); |
| 944 | if (!error) { |
| 945 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 946 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | } |
| 948 | if (error) { |
| 949 | ASSERT(committed); |
| 950 | args->trans = NULL; |
| 951 | xfs_bmap_cancel(args->flist); |
| 952 | return(error); |
| 953 | } |
| 954 | |
| 955 | /* |
| 956 | * bmap_finish() may have committed the last trans and started |
| 957 | * a new one. We need the inode to be in all transactions. |
| 958 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 959 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 960 | xfs_trans_ijoin(args->trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
| 962 | /* |
| 963 | * Commit the current trans (including the inode) and start |
| 964 | * a new one. |
| 965 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 966 | error = xfs_trans_roll(&args->trans, dp); |
| 967 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 981 | error = xfs_trans_roll(&args->trans, dp); |
| 982 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | return (error); |
| 984 | |
| 985 | /* |
| 986 | * If there was an out-of-line value, allocate the blocks we |
| 987 | * identified for its storage and copy the value. This is done |
| 988 | * after we create the attribute so that we don't overflow the |
| 989 | * maximum size of a transaction and/or hit a deadlock. |
| 990 | */ |
| 991 | if (args->rmtblkno > 0) { |
| 992 | error = xfs_attr_rmtval_set(args); |
| 993 | if (error) |
| 994 | return(error); |
| 995 | } |
| 996 | |
| 997 | /* |
| 998 | * If this is an atomic rename operation, we must "flip" the |
| 999 | * incomplete flags on the "new" and "old" attribute/value pairs |
| 1000 | * so that one disappears and one appears atomically. Then we |
| 1001 | * must remove the "old" attribute/value pair. |
| 1002 | */ |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 1003 | if (args->op_flags & XFS_DA_OP_RENAME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | /* |
| 1005 | * In a separate transaction, set the incomplete flag on the |
| 1006 | * "old" attr and clear the incomplete flag on the "new" attr. |
| 1007 | */ |
| 1008 | error = xfs_attr_leaf_flipflags(args); |
| 1009 | if (error) |
| 1010 | return(error); |
| 1011 | |
| 1012 | /* |
| 1013 | * Dismantle the "old" attribute/value pair by removing |
| 1014 | * a "remote" value (if it exists). |
| 1015 | */ |
| 1016 | args->index = args->index2; |
| 1017 | args->blkno = args->blkno2; |
| 1018 | args->rmtblkno = args->rmtblkno2; |
| 1019 | args->rmtblkcnt = args->rmtblkcnt2; |
| 1020 | if (args->rmtblkno) { |
| 1021 | error = xfs_attr_rmtval_remove(args); |
| 1022 | if (error) |
| 1023 | return(error); |
| 1024 | } |
| 1025 | |
| 1026 | /* |
| 1027 | * Read in the block containing the "old" attr, then |
| 1028 | * remove the "old" attr from that block (neat, huh!) |
| 1029 | */ |
| 1030 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, |
| 1031 | &bp, XFS_ATTR_FORK); |
| 1032 | if (error) |
| 1033 | return(error); |
| 1034 | ASSERT(bp != NULL); |
| 1035 | (void)xfs_attr_leaf_remove(bp, args); |
| 1036 | |
| 1037 | /* |
| 1038 | * If the result is small enough, shrink it all into the inode. |
| 1039 | */ |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1040 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1041 | xfs_bmap_init(args->flist, args->firstblock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1042 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | /* bp is gone due to xfs_da_shrink_inode */ |
| 1044 | if (!error) { |
| 1045 | error = xfs_bmap_finish(&args->trans, |
| 1046 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | &committed); |
| 1048 | } |
| 1049 | if (error) { |
| 1050 | ASSERT(committed); |
| 1051 | args->trans = NULL; |
| 1052 | xfs_bmap_cancel(args->flist); |
| 1053 | return(error); |
| 1054 | } |
| 1055 | |
| 1056 | /* |
| 1057 | * bmap_finish() may have committed the last trans |
| 1058 | * and started a new one. We need the inode to be |
| 1059 | * in all transactions. |
| 1060 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1061 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1062 | xfs_trans_ijoin(args->trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | } else |
| 1064 | xfs_da_buf_done(bp); |
| 1065 | |
| 1066 | /* |
| 1067 | * Commit the remove and start the next trans in series. |
| 1068 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1069 | error = xfs_trans_roll(&args->trans, dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
| 1071 | } else if (args->rmtblkno > 0) { |
| 1072 | /* |
| 1073 | * Added a "remote" value, just clear the incomplete flag. |
| 1074 | */ |
| 1075 | error = xfs_attr_leaf_clearflag(args); |
| 1076 | } |
| 1077 | return(error); |
| 1078 | } |
| 1079 | |
| 1080 | /* |
| 1081 | * Remove a name from the leaf attribute list structure |
| 1082 | * |
| 1083 | * This leaf block cannot have a "remote" value, we only call this routine |
| 1084 | * if bmap_one_block() says there is only one block (ie: no remote blks). |
| 1085 | */ |
| 1086 | STATIC int |
| 1087 | xfs_attr_leaf_removename(xfs_da_args_t *args) |
| 1088 | { |
| 1089 | xfs_inode_t *dp; |
| 1090 | xfs_dabuf_t *bp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1091 | int error, committed, forkoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | |
| 1093 | /* |
| 1094 | * Remove the attribute. |
| 1095 | */ |
| 1096 | dp = args->dp; |
| 1097 | args->blkno = 0; |
| 1098 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, |
| 1099 | XFS_ATTR_FORK); |
| 1100 | if (error) { |
| 1101 | return(error); |
| 1102 | } |
| 1103 | |
| 1104 | ASSERT(bp != NULL); |
| 1105 | error = xfs_attr_leaf_lookup_int(bp, args); |
| 1106 | if (error == ENOATTR) { |
| 1107 | xfs_da_brelse(args->trans, bp); |
| 1108 | return(error); |
| 1109 | } |
| 1110 | |
| 1111 | (void)xfs_attr_leaf_remove(bp, args); |
| 1112 | |
| 1113 | /* |
| 1114 | * If the result is small enough, shrink it all into the inode. |
| 1115 | */ |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1116 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1117 | xfs_bmap_init(args->flist, args->firstblock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1118 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | /* bp is gone due to xfs_da_shrink_inode */ |
| 1120 | if (!error) { |
| 1121 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1122 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | } |
| 1124 | if (error) { |
| 1125 | ASSERT(committed); |
| 1126 | args->trans = NULL; |
| 1127 | xfs_bmap_cancel(args->flist); |
| 1128 | return(error); |
| 1129 | } |
| 1130 | |
| 1131 | /* |
| 1132 | * bmap_finish() may have committed the last trans and started |
| 1133 | * a new one. We need the inode to be in all transactions. |
| 1134 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1135 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1136 | xfs_trans_ijoin(args->trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | } else |
| 1138 | xfs_da_buf_done(bp); |
| 1139 | return(0); |
| 1140 | } |
| 1141 | |
| 1142 | /* |
| 1143 | * Look up a name in a leaf attribute list structure. |
| 1144 | * |
| 1145 | * This leaf block cannot have a "remote" value, we only call this routine |
| 1146 | * if bmap_one_block() says there is only one block (ie: no remote blks). |
| 1147 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1148 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | xfs_attr_leaf_get(xfs_da_args_t *args) |
| 1150 | { |
| 1151 | xfs_dabuf_t *bp; |
| 1152 | int error; |
| 1153 | |
| 1154 | args->blkno = 0; |
| 1155 | error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp, |
| 1156 | XFS_ATTR_FORK); |
| 1157 | if (error) |
| 1158 | return(error); |
| 1159 | ASSERT(bp != NULL); |
| 1160 | |
| 1161 | error = xfs_attr_leaf_lookup_int(bp, args); |
| 1162 | if (error != EEXIST) { |
| 1163 | xfs_da_brelse(args->trans, bp); |
| 1164 | return(error); |
| 1165 | } |
| 1166 | error = xfs_attr_leaf_getvalue(bp, args); |
| 1167 | xfs_da_brelse(args->trans, bp); |
| 1168 | if (!error && (args->rmtblkno > 0) && !(args->flags & ATTR_KERNOVAL)) { |
| 1169 | error = xfs_attr_rmtval_get(args); |
| 1170 | } |
| 1171 | return(error); |
| 1172 | } |
| 1173 | |
| 1174 | /* |
| 1175 | * Copy out attribute entries for attr_list(), for leaf attribute lists. |
| 1176 | */ |
| 1177 | STATIC int |
| 1178 | xfs_attr_leaf_list(xfs_attr_list_context_t *context) |
| 1179 | { |
| 1180 | xfs_attr_leafblock_t *leaf; |
| 1181 | int error; |
| 1182 | xfs_dabuf_t *bp; |
| 1183 | |
| 1184 | context->cursor->blkno = 0; |
| 1185 | error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK); |
| 1186 | if (error) |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1187 | return XFS_ERROR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | ASSERT(bp != NULL); |
| 1189 | leaf = bp->data; |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1190 | if (unlikely(leaf->hdr.info.magic != cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW, |
| 1192 | context->dp->i_mount, leaf); |
| 1193 | xfs_da_brelse(NULL, bp); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1194 | return XFS_ERROR(EFSCORRUPTED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | } |
| 1196 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1197 | error = xfs_attr_leaf_list_int(bp, context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | xfs_da_brelse(NULL, bp); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1199 | return XFS_ERROR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | } |
| 1201 | |
| 1202 | |
| 1203 | /*======================================================================== |
| 1204 | * External routines when attribute list size > XFS_LBSIZE(mp). |
| 1205 | *========================================================================*/ |
| 1206 | |
| 1207 | /* |
| 1208 | * Add a name to a Btree-format attribute list. |
| 1209 | * |
| 1210 | * This will involve walking down the Btree, and may involve splitting |
| 1211 | * leaf nodes and even splitting intermediate nodes up to and including |
| 1212 | * the root node (a special case of an intermediate node). |
| 1213 | * |
| 1214 | * "Remote" attribute values confuse the issue and atomic rename operations |
| 1215 | * add a whole extra layer of confusion on top of that. |
| 1216 | */ |
| 1217 | STATIC int |
| 1218 | xfs_attr_node_addname(xfs_da_args_t *args) |
| 1219 | { |
| 1220 | xfs_da_state_t *state; |
| 1221 | xfs_da_state_blk_t *blk; |
| 1222 | xfs_inode_t *dp; |
| 1223 | xfs_mount_t *mp; |
| 1224 | int committed, retval, error; |
| 1225 | |
| 1226 | /* |
| 1227 | * Fill in bucket of arguments/results/context to carry around. |
| 1228 | */ |
| 1229 | dp = args->dp; |
| 1230 | mp = dp->i_mount; |
| 1231 | restart: |
| 1232 | state = xfs_da_state_alloc(); |
| 1233 | state->args = args; |
| 1234 | state->mp = mp; |
| 1235 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1236 | state->node_ents = state->mp->m_attr_node_ents; |
| 1237 | |
| 1238 | /* |
| 1239 | * Search to see if name already exists, and get back a pointer |
| 1240 | * to where it should go. |
| 1241 | */ |
| 1242 | error = xfs_da_node_lookup_int(state, &retval); |
| 1243 | if (error) |
| 1244 | goto out; |
| 1245 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1246 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1247 | if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) { |
| 1248 | goto out; |
| 1249 | } else if (retval == EEXIST) { |
| 1250 | if (args->flags & ATTR_CREATE) |
| 1251 | goto out; |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 1252 | args->op_flags |= XFS_DA_OP_RENAME; /* atomic rename op */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | args->blkno2 = args->blkno; /* set 2nd entry info*/ |
| 1254 | args->index2 = args->index; |
| 1255 | args->rmtblkno2 = args->rmtblkno; |
| 1256 | args->rmtblkcnt2 = args->rmtblkcnt; |
| 1257 | args->rmtblkno = 0; |
| 1258 | args->rmtblkcnt = 0; |
| 1259 | } |
| 1260 | |
| 1261 | retval = xfs_attr_leaf_add(blk->bp, state->args); |
| 1262 | if (retval == ENOSPC) { |
| 1263 | if (state->path.active == 1) { |
| 1264 | /* |
| 1265 | * Its really a single leaf node, but it had |
| 1266 | * out-of-line values so it looked like it *might* |
| 1267 | * have been a b-tree. |
| 1268 | */ |
| 1269 | xfs_da_state_free(state); |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1270 | xfs_bmap_init(args->flist, args->firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | error = xfs_attr_leaf_to_node(args); |
| 1272 | if (!error) { |
| 1273 | error = xfs_bmap_finish(&args->trans, |
| 1274 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | &committed); |
| 1276 | } |
| 1277 | if (error) { |
| 1278 | ASSERT(committed); |
| 1279 | args->trans = NULL; |
| 1280 | xfs_bmap_cancel(args->flist); |
| 1281 | goto out; |
| 1282 | } |
| 1283 | |
| 1284 | /* |
| 1285 | * bmap_finish() may have committed the last trans |
| 1286 | * and started a new one. We need the inode to be |
| 1287 | * in all transactions. |
| 1288 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1289 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1290 | xfs_trans_ijoin(args->trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | |
| 1292 | /* |
| 1293 | * Commit the node conversion and start the next |
| 1294 | * trans in the chain. |
| 1295 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1296 | error = xfs_trans_roll(&args->trans, dp); |
| 1297 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | goto out; |
| 1299 | |
| 1300 | goto restart; |
| 1301 | } |
| 1302 | |
| 1303 | /* |
| 1304 | * Split as many Btree elements as required. |
| 1305 | * This code tracks the new and old attr's location |
| 1306 | * in the index/blkno/rmtblkno/rmtblkcnt fields and |
| 1307 | * in the index2/blkno2/rmtblkno2/rmtblkcnt2 fields. |
| 1308 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1309 | xfs_bmap_init(args->flist, args->firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | error = xfs_da_split(state); |
| 1311 | if (!error) { |
| 1312 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1313 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | } |
| 1315 | if (error) { |
| 1316 | ASSERT(committed); |
| 1317 | args->trans = NULL; |
| 1318 | xfs_bmap_cancel(args->flist); |
| 1319 | goto out; |
| 1320 | } |
| 1321 | |
| 1322 | /* |
| 1323 | * bmap_finish() may have committed the last trans and started |
| 1324 | * a new one. We need the inode to be in all transactions. |
| 1325 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1326 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1327 | xfs_trans_ijoin(args->trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | } else { |
| 1329 | /* |
| 1330 | * Addition succeeded, update Btree hashvals. |
| 1331 | */ |
| 1332 | xfs_da_fixhashpath(state, &state->path); |
| 1333 | } |
| 1334 | |
| 1335 | /* |
| 1336 | * Kill the state structure, we're done with it and need to |
| 1337 | * allow the buffers to come back later. |
| 1338 | */ |
| 1339 | xfs_da_state_free(state); |
| 1340 | state = NULL; |
| 1341 | |
| 1342 | /* |
| 1343 | * Commit the leaf addition or btree split and start the next |
| 1344 | * trans in the chain. |
| 1345 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1346 | error = xfs_trans_roll(&args->trans, dp); |
| 1347 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | goto out; |
| 1349 | |
| 1350 | /* |
| 1351 | * If there was an out-of-line value, allocate the blocks we |
| 1352 | * identified for its storage and copy the value. This is done |
| 1353 | * after we create the attribute so that we don't overflow the |
| 1354 | * maximum size of a transaction and/or hit a deadlock. |
| 1355 | */ |
| 1356 | if (args->rmtblkno > 0) { |
| 1357 | error = xfs_attr_rmtval_set(args); |
| 1358 | if (error) |
| 1359 | return(error); |
| 1360 | } |
| 1361 | |
| 1362 | /* |
| 1363 | * If this is an atomic rename operation, we must "flip" the |
| 1364 | * incomplete flags on the "new" and "old" attribute/value pairs |
| 1365 | * so that one disappears and one appears atomically. Then we |
| 1366 | * must remove the "old" attribute/value pair. |
| 1367 | */ |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 1368 | if (args->op_flags & XFS_DA_OP_RENAME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | /* |
| 1370 | * In a separate transaction, set the incomplete flag on the |
| 1371 | * "old" attr and clear the incomplete flag on the "new" attr. |
| 1372 | */ |
| 1373 | error = xfs_attr_leaf_flipflags(args); |
| 1374 | if (error) |
| 1375 | goto out; |
| 1376 | |
| 1377 | /* |
| 1378 | * Dismantle the "old" attribute/value pair by removing |
| 1379 | * a "remote" value (if it exists). |
| 1380 | */ |
| 1381 | args->index = args->index2; |
| 1382 | args->blkno = args->blkno2; |
| 1383 | args->rmtblkno = args->rmtblkno2; |
| 1384 | args->rmtblkcnt = args->rmtblkcnt2; |
| 1385 | if (args->rmtblkno) { |
| 1386 | error = xfs_attr_rmtval_remove(args); |
| 1387 | if (error) |
| 1388 | return(error); |
| 1389 | } |
| 1390 | |
| 1391 | /* |
| 1392 | * Re-find the "old" attribute entry after any split ops. |
| 1393 | * The INCOMPLETE flag means that we will find the "old" |
| 1394 | * attr, not the "new" one. |
| 1395 | */ |
| 1396 | args->flags |= XFS_ATTR_INCOMPLETE; |
| 1397 | state = xfs_da_state_alloc(); |
| 1398 | state->args = args; |
| 1399 | state->mp = mp; |
| 1400 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1401 | state->node_ents = state->mp->m_attr_node_ents; |
| 1402 | state->inleaf = 0; |
| 1403 | error = xfs_da_node_lookup_int(state, &retval); |
| 1404 | if (error) |
| 1405 | goto out; |
| 1406 | |
| 1407 | /* |
| 1408 | * Remove the name and update the hashvals in the tree. |
| 1409 | */ |
| 1410 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1411 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1412 | error = xfs_attr_leaf_remove(blk->bp, args); |
| 1413 | xfs_da_fixhashpath(state, &state->path); |
| 1414 | |
| 1415 | /* |
| 1416 | * Check to see if the tree needs to be collapsed. |
| 1417 | */ |
| 1418 | if (retval && (state->path.active > 1)) { |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1419 | xfs_bmap_init(args->flist, args->firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | error = xfs_da_join(state); |
| 1421 | if (!error) { |
| 1422 | error = xfs_bmap_finish(&args->trans, |
| 1423 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | &committed); |
| 1425 | } |
| 1426 | if (error) { |
| 1427 | ASSERT(committed); |
| 1428 | args->trans = NULL; |
| 1429 | xfs_bmap_cancel(args->flist); |
| 1430 | goto out; |
| 1431 | } |
| 1432 | |
| 1433 | /* |
| 1434 | * bmap_finish() may have committed the last trans |
| 1435 | * and started a new one. We need the inode to be |
| 1436 | * in all transactions. |
| 1437 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1438 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1439 | xfs_trans_ijoin(args->trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | } |
| 1441 | |
| 1442 | /* |
| 1443 | * Commit and start the next trans in the chain. |
| 1444 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1445 | error = xfs_trans_roll(&args->trans, dp); |
| 1446 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | goto out; |
| 1448 | |
| 1449 | } else if (args->rmtblkno > 0) { |
| 1450 | /* |
| 1451 | * Added a "remote" value, just clear the incomplete flag. |
| 1452 | */ |
| 1453 | error = xfs_attr_leaf_clearflag(args); |
| 1454 | if (error) |
| 1455 | goto out; |
| 1456 | } |
| 1457 | retval = error = 0; |
| 1458 | |
| 1459 | out: |
| 1460 | if (state) |
| 1461 | xfs_da_state_free(state); |
| 1462 | if (error) |
| 1463 | return(error); |
| 1464 | return(retval); |
| 1465 | } |
| 1466 | |
| 1467 | /* |
| 1468 | * Remove a name from a B-tree attribute list. |
| 1469 | * |
| 1470 | * This will involve walking down the Btree, and may involve joining |
| 1471 | * leaf nodes and even joining intermediate nodes up to and including |
| 1472 | * the root node (a special case of an intermediate node). |
| 1473 | */ |
| 1474 | STATIC int |
| 1475 | xfs_attr_node_removename(xfs_da_args_t *args) |
| 1476 | { |
| 1477 | xfs_da_state_t *state; |
| 1478 | xfs_da_state_blk_t *blk; |
| 1479 | xfs_inode_t *dp; |
| 1480 | xfs_dabuf_t *bp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1481 | int retval, error, committed, forkoff; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
| 1483 | /* |
| 1484 | * Tie a string around our finger to remind us where we are. |
| 1485 | */ |
| 1486 | dp = args->dp; |
| 1487 | state = xfs_da_state_alloc(); |
| 1488 | state->args = args; |
| 1489 | state->mp = dp->i_mount; |
| 1490 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1491 | state->node_ents = state->mp->m_attr_node_ents; |
| 1492 | |
| 1493 | /* |
| 1494 | * Search to see if name exists, and get back a pointer to it. |
| 1495 | */ |
| 1496 | error = xfs_da_node_lookup_int(state, &retval); |
| 1497 | if (error || (retval != EEXIST)) { |
| 1498 | if (error == 0) |
| 1499 | error = retval; |
| 1500 | goto out; |
| 1501 | } |
| 1502 | |
| 1503 | /* |
| 1504 | * If there is an out-of-line value, de-allocate the blocks. |
| 1505 | * This is done before we remove the attribute so that we don't |
| 1506 | * overflow the maximum size of a transaction and/or hit a deadlock. |
| 1507 | */ |
| 1508 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1509 | ASSERT(blk->bp != NULL); |
| 1510 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1511 | if (args->rmtblkno > 0) { |
| 1512 | /* |
| 1513 | * Fill in disk block numbers in the state structure |
| 1514 | * so that we can get the buffers back after we commit |
| 1515 | * several transactions in the following calls. |
| 1516 | */ |
| 1517 | error = xfs_attr_fillstate(state); |
| 1518 | if (error) |
| 1519 | goto out; |
| 1520 | |
| 1521 | /* |
| 1522 | * Mark the attribute as INCOMPLETE, then bunmapi() the |
| 1523 | * remote value. |
| 1524 | */ |
| 1525 | error = xfs_attr_leaf_setflag(args); |
| 1526 | if (error) |
| 1527 | goto out; |
| 1528 | error = xfs_attr_rmtval_remove(args); |
| 1529 | if (error) |
| 1530 | goto out; |
| 1531 | |
| 1532 | /* |
| 1533 | * Refill the state structure with buffers, the prior calls |
| 1534 | * released our buffers. |
| 1535 | */ |
| 1536 | error = xfs_attr_refillstate(state); |
| 1537 | if (error) |
| 1538 | goto out; |
| 1539 | } |
| 1540 | |
| 1541 | /* |
| 1542 | * Remove the name and update the hashvals in the tree. |
| 1543 | */ |
| 1544 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1545 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1546 | retval = xfs_attr_leaf_remove(blk->bp, args); |
| 1547 | xfs_da_fixhashpath(state, &state->path); |
| 1548 | |
| 1549 | /* |
| 1550 | * Check to see if the tree needs to be collapsed. |
| 1551 | */ |
| 1552 | if (retval && (state->path.active > 1)) { |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1553 | xfs_bmap_init(args->flist, args->firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | error = xfs_da_join(state); |
| 1555 | if (!error) { |
| 1556 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 1557 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | } |
| 1559 | if (error) { |
| 1560 | ASSERT(committed); |
| 1561 | args->trans = NULL; |
| 1562 | xfs_bmap_cancel(args->flist); |
| 1563 | goto out; |
| 1564 | } |
| 1565 | |
| 1566 | /* |
| 1567 | * bmap_finish() may have committed the last trans and started |
| 1568 | * a new one. We need the inode to be in all transactions. |
| 1569 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1570 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1571 | xfs_trans_ijoin(args->trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | |
| 1573 | /* |
| 1574 | * Commit the Btree join operation and start a new trans. |
| 1575 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 1576 | error = xfs_trans_roll(&args->trans, dp); |
| 1577 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | goto out; |
| 1579 | } |
| 1580 | |
| 1581 | /* |
| 1582 | * If the result is small enough, push it all into the inode. |
| 1583 | */ |
| 1584 | if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) { |
| 1585 | /* |
| 1586 | * Have to get rid of the copy of this dabuf in the state. |
| 1587 | */ |
| 1588 | ASSERT(state->path.active == 1); |
| 1589 | ASSERT(state->path.blk[0].bp); |
| 1590 | xfs_da_buf_done(state->path.blk[0].bp); |
| 1591 | state->path.blk[0].bp = NULL; |
| 1592 | |
| 1593 | error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, |
| 1594 | XFS_ATTR_FORK); |
| 1595 | if (error) |
| 1596 | goto out; |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1597 | ASSERT((((xfs_attr_leafblock_t *)bp->data)->hdr.info.magic) == |
| 1598 | cpu_to_be16(XFS_ATTR_LEAF_MAGIC)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1600 | if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) { |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 1601 | xfs_bmap_init(args->flist, args->firstblock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 1602 | error = xfs_attr_leaf_to_shortform(bp, args, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | /* bp is gone due to xfs_da_shrink_inode */ |
| 1604 | if (!error) { |
| 1605 | error = xfs_bmap_finish(&args->trans, |
| 1606 | args->flist, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | &committed); |
| 1608 | } |
| 1609 | if (error) { |
| 1610 | ASSERT(committed); |
| 1611 | args->trans = NULL; |
| 1612 | xfs_bmap_cancel(args->flist); |
| 1613 | goto out; |
| 1614 | } |
| 1615 | |
| 1616 | /* |
| 1617 | * bmap_finish() may have committed the last trans |
| 1618 | * and started a new one. We need the inode to be |
| 1619 | * in all transactions. |
| 1620 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 1621 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 1622 | xfs_trans_ijoin(args->trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | } else |
| 1624 | xfs_da_brelse(args->trans, bp); |
| 1625 | } |
| 1626 | error = 0; |
| 1627 | |
| 1628 | out: |
| 1629 | xfs_da_state_free(state); |
| 1630 | return(error); |
| 1631 | } |
| 1632 | |
| 1633 | /* |
| 1634 | * Fill in the disk block numbers in the state structure for the buffers |
| 1635 | * that are attached to the state structure. |
| 1636 | * 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] | 1637 | * after some set of transaction commits have released these buffers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | */ |
| 1639 | STATIC int |
| 1640 | xfs_attr_fillstate(xfs_da_state_t *state) |
| 1641 | { |
| 1642 | xfs_da_state_path_t *path; |
| 1643 | xfs_da_state_blk_t *blk; |
| 1644 | int level; |
| 1645 | |
| 1646 | /* |
| 1647 | * Roll down the "path" in the state structure, storing the on-disk |
| 1648 | * block number for those buffers in the "path". |
| 1649 | */ |
| 1650 | path = &state->path; |
| 1651 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1652 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1653 | if (blk->bp) { |
| 1654 | blk->disk_blkno = xfs_da_blkno(blk->bp); |
| 1655 | xfs_da_buf_done(blk->bp); |
| 1656 | blk->bp = NULL; |
| 1657 | } else { |
| 1658 | blk->disk_blkno = 0; |
| 1659 | } |
| 1660 | } |
| 1661 | |
| 1662 | /* |
| 1663 | * Roll down the "altpath" in the state structure, storing the on-disk |
| 1664 | * block number for those buffers in the "altpath". |
| 1665 | */ |
| 1666 | path = &state->altpath; |
| 1667 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1668 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1669 | if (blk->bp) { |
| 1670 | blk->disk_blkno = xfs_da_blkno(blk->bp); |
| 1671 | xfs_da_buf_done(blk->bp); |
| 1672 | blk->bp = NULL; |
| 1673 | } else { |
| 1674 | blk->disk_blkno = 0; |
| 1675 | } |
| 1676 | } |
| 1677 | |
| 1678 | return(0); |
| 1679 | } |
| 1680 | |
| 1681 | /* |
| 1682 | * Reattach the buffers to the state structure based on the disk block |
| 1683 | * numbers stored in the state structure. |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1684 | * This is done after some set of transaction commits have released those |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | * buffers from our grip. |
| 1686 | */ |
| 1687 | STATIC int |
| 1688 | xfs_attr_refillstate(xfs_da_state_t *state) |
| 1689 | { |
| 1690 | xfs_da_state_path_t *path; |
| 1691 | xfs_da_state_blk_t *blk; |
| 1692 | int level, error; |
| 1693 | |
| 1694 | /* |
| 1695 | * Roll down the "path" in the state structure, storing the on-disk |
| 1696 | * block number for those buffers in the "path". |
| 1697 | */ |
| 1698 | path = &state->path; |
| 1699 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1700 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1701 | if (blk->disk_blkno) { |
| 1702 | error = xfs_da_read_buf(state->args->trans, |
| 1703 | state->args->dp, |
| 1704 | blk->blkno, blk->disk_blkno, |
| 1705 | &blk->bp, XFS_ATTR_FORK); |
| 1706 | if (error) |
| 1707 | return(error); |
| 1708 | } else { |
| 1709 | blk->bp = NULL; |
| 1710 | } |
| 1711 | } |
| 1712 | |
| 1713 | /* |
| 1714 | * Roll down the "altpath" in the state structure, storing the on-disk |
| 1715 | * block number for those buffers in the "altpath". |
| 1716 | */ |
| 1717 | path = &state->altpath; |
| 1718 | ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1719 | for (blk = path->blk, level = 0; level < path->active; blk++, level++) { |
| 1720 | if (blk->disk_blkno) { |
| 1721 | error = xfs_da_read_buf(state->args->trans, |
| 1722 | state->args->dp, |
| 1723 | blk->blkno, blk->disk_blkno, |
| 1724 | &blk->bp, XFS_ATTR_FORK); |
| 1725 | if (error) |
| 1726 | return(error); |
| 1727 | } else { |
| 1728 | blk->bp = NULL; |
| 1729 | } |
| 1730 | } |
| 1731 | |
| 1732 | return(0); |
| 1733 | } |
| 1734 | |
| 1735 | /* |
| 1736 | * Look up a filename in a node attribute list. |
| 1737 | * |
| 1738 | * This routine gets called for any attribute fork that has more than one |
| 1739 | * block, ie: both true Btree attr lists and for single-leaf-blocks with |
| 1740 | * "remote" values taking up more blocks. |
| 1741 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1742 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | xfs_attr_node_get(xfs_da_args_t *args) |
| 1744 | { |
| 1745 | xfs_da_state_t *state; |
| 1746 | xfs_da_state_blk_t *blk; |
| 1747 | int error, retval; |
| 1748 | int i; |
| 1749 | |
| 1750 | state = xfs_da_state_alloc(); |
| 1751 | state->args = args; |
| 1752 | state->mp = args->dp->i_mount; |
| 1753 | state->blocksize = state->mp->m_sb.sb_blocksize; |
| 1754 | state->node_ents = state->mp->m_attr_node_ents; |
| 1755 | |
| 1756 | /* |
| 1757 | * Search to see if name exists, and get back a pointer to it. |
| 1758 | */ |
| 1759 | error = xfs_da_node_lookup_int(state, &retval); |
| 1760 | if (error) { |
| 1761 | retval = error; |
| 1762 | } else if (retval == EEXIST) { |
| 1763 | blk = &state->path.blk[ state->path.active-1 ]; |
| 1764 | ASSERT(blk->bp != NULL); |
| 1765 | ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1766 | |
| 1767 | /* |
| 1768 | * Get the value, local or "remote" |
| 1769 | */ |
| 1770 | retval = xfs_attr_leaf_getvalue(blk->bp, args); |
| 1771 | if (!retval && (args->rmtblkno > 0) |
| 1772 | && !(args->flags & ATTR_KERNOVAL)) { |
| 1773 | retval = xfs_attr_rmtval_get(args); |
| 1774 | } |
| 1775 | } |
| 1776 | |
| 1777 | /* |
| 1778 | * If not in a transaction, we have to release all the buffers. |
| 1779 | */ |
| 1780 | for (i = 0; i < state->path.active; i++) { |
| 1781 | xfs_da_brelse(args->trans, state->path.blk[i].bp); |
| 1782 | state->path.blk[i].bp = NULL; |
| 1783 | } |
| 1784 | |
| 1785 | xfs_da_state_free(state); |
| 1786 | return(retval); |
| 1787 | } |
| 1788 | |
| 1789 | STATIC int /* error */ |
| 1790 | xfs_attr_node_list(xfs_attr_list_context_t *context) |
| 1791 | { |
| 1792 | attrlist_cursor_kern_t *cursor; |
| 1793 | xfs_attr_leafblock_t *leaf; |
| 1794 | xfs_da_intnode_t *node; |
| 1795 | xfs_da_node_entry_t *btree; |
| 1796 | int error, i; |
| 1797 | xfs_dabuf_t *bp; |
| 1798 | |
| 1799 | cursor = context->cursor; |
| 1800 | cursor->initted = 1; |
| 1801 | |
| 1802 | /* |
| 1803 | * Do all sorts of validation on the passed-in cursor structure. |
| 1804 | * If anything is amiss, ignore the cursor and look up the hashval |
| 1805 | * starting from the btree root. |
| 1806 | */ |
| 1807 | bp = NULL; |
| 1808 | if (cursor->blkno > 0) { |
| 1809 | error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, |
| 1810 | &bp, XFS_ATTR_FORK); |
| 1811 | if ((error != 0) && (error != EFSCORRUPTED)) |
| 1812 | return(error); |
| 1813 | if (bp) { |
| 1814 | node = bp->data; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1815 | switch (be16_to_cpu(node->hdr.info.magic)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | case XFS_DA_NODE_MAGIC: |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1817 | trace_xfs_attr_list_wrong_blk(context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | xfs_da_brelse(NULL, bp); |
| 1819 | bp = NULL; |
| 1820 | break; |
| 1821 | case XFS_ATTR_LEAF_MAGIC: |
| 1822 | leaf = bp->data; |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1823 | if (cursor->hashval > be32_to_cpu(leaf->entries[ |
| 1824 | be16_to_cpu(leaf->hdr.count)-1].hashval)) { |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1825 | trace_xfs_attr_list_wrong_blk(context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | xfs_da_brelse(NULL, bp); |
| 1827 | bp = NULL; |
| 1828 | } else if (cursor->hashval <= |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1829 | be32_to_cpu(leaf->entries[0].hashval)) { |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1830 | trace_xfs_attr_list_wrong_blk(context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | xfs_da_brelse(NULL, bp); |
| 1832 | bp = NULL; |
| 1833 | } |
| 1834 | break; |
| 1835 | default: |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1836 | trace_xfs_attr_list_wrong_blk(context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | xfs_da_brelse(NULL, bp); |
| 1838 | bp = NULL; |
| 1839 | } |
| 1840 | } |
| 1841 | } |
| 1842 | |
| 1843 | /* |
| 1844 | * We did not find what we expected given the cursor's contents, |
| 1845 | * so we start from the top and work down based on the hash value. |
| 1846 | * Note that start of node block is same as start of leaf block. |
| 1847 | */ |
| 1848 | if (bp == NULL) { |
| 1849 | cursor->blkno = 0; |
| 1850 | for (;;) { |
| 1851 | error = xfs_da_read_buf(NULL, context->dp, |
| 1852 | cursor->blkno, -1, &bp, |
| 1853 | XFS_ATTR_FORK); |
| 1854 | if (error) |
| 1855 | return(error); |
| 1856 | if (unlikely(bp == NULL)) { |
| 1857 | XFS_ERROR_REPORT("xfs_attr_node_list(2)", |
| 1858 | XFS_ERRLEVEL_LOW, |
| 1859 | context->dp->i_mount); |
| 1860 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1861 | } |
| 1862 | node = bp->data; |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1863 | if (node->hdr.info.magic == |
| 1864 | cpu_to_be16(XFS_ATTR_LEAF_MAGIC)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1865 | break; |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1866 | if (unlikely(node->hdr.info.magic != |
| 1867 | cpu_to_be16(XFS_DA_NODE_MAGIC))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)", |
| 1869 | XFS_ERRLEVEL_LOW, |
| 1870 | context->dp->i_mount, |
| 1871 | node); |
| 1872 | xfs_da_brelse(NULL, bp); |
| 1873 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1874 | } |
| 1875 | btree = node->btree; |
Nathan Scott | fac80cc | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 1876 | for (i = 0; i < be16_to_cpu(node->hdr.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | btree++, i++) { |
| 1878 | if (cursor->hashval |
Nathan Scott | 403432d | 2006-03-17 17:29:46 +1100 | [diff] [blame] | 1879 | <= be32_to_cpu(btree->hashval)) { |
| 1880 | cursor->blkno = be32_to_cpu(btree->before); |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1881 | trace_xfs_attr_list_node_descend(context, |
| 1882 | btree); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | break; |
| 1884 | } |
| 1885 | } |
Nathan Scott | fac80cc | 2006-03-17 17:29:56 +1100 | [diff] [blame] | 1886 | if (i == be16_to_cpu(node->hdr.count)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | xfs_da_brelse(NULL, bp); |
| 1888 | return(0); |
| 1889 | } |
| 1890 | xfs_da_brelse(NULL, bp); |
| 1891 | } |
| 1892 | } |
| 1893 | ASSERT(bp != NULL); |
| 1894 | |
| 1895 | /* |
| 1896 | * Roll upward through the blocks, processing each leaf block in |
| 1897 | * order. As long as there is space in the result buffer, keep |
| 1898 | * adding the information. |
| 1899 | */ |
| 1900 | for (;;) { |
| 1901 | leaf = bp->data; |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1902 | if (unlikely(leaf->hdr.info.magic != |
| 1903 | cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)", |
| 1905 | XFS_ERRLEVEL_LOW, |
| 1906 | context->dp->i_mount, leaf); |
| 1907 | xfs_da_brelse(NULL, bp); |
| 1908 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1909 | } |
| 1910 | error = xfs_attr_leaf_list_int(bp, context); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1911 | if (error) { |
| 1912 | xfs_da_brelse(NULL, bp); |
| 1913 | return error; |
| 1914 | } |
| 1915 | if (context->seen_enough || leaf->hdr.info.forw == 0) |
| 1916 | break; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1917 | cursor->blkno = be32_to_cpu(leaf->hdr.info.forw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | xfs_da_brelse(NULL, bp); |
| 1919 | error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1, |
| 1920 | &bp, XFS_ATTR_FORK); |
| 1921 | if (error) |
| 1922 | return(error); |
| 1923 | if (unlikely((bp == NULL))) { |
| 1924 | XFS_ERROR_REPORT("xfs_attr_node_list(5)", |
| 1925 | XFS_ERRLEVEL_LOW, |
| 1926 | context->dp->i_mount); |
| 1927 | return(XFS_ERROR(EFSCORRUPTED)); |
| 1928 | } |
| 1929 | } |
| 1930 | xfs_da_brelse(NULL, bp); |
| 1931 | return(0); |
| 1932 | } |
| 1933 | |
| 1934 | |
| 1935 | /*======================================================================== |
| 1936 | * External routines for manipulating out-of-line attribute values. |
| 1937 | *========================================================================*/ |
| 1938 | |
| 1939 | /* |
| 1940 | * Read the value associated with an attribute from the out-of-line buffer |
| 1941 | * that we stored it in. |
| 1942 | */ |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1943 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | xfs_attr_rmtval_get(xfs_da_args_t *args) |
| 1945 | { |
| 1946 | xfs_bmbt_irec_t map[ATTR_RMTVALUE_MAPSIZE]; |
| 1947 | xfs_mount_t *mp; |
| 1948 | xfs_daddr_t dblkno; |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 1949 | void *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | xfs_buf_t *bp; |
| 1951 | int nmap, error, tmp, valuelen, blkcnt, i; |
| 1952 | xfs_dablk_t lblkno; |
| 1953 | |
| 1954 | ASSERT(!(args->flags & ATTR_KERNOVAL)); |
| 1955 | |
| 1956 | mp = args->dp->i_mount; |
| 1957 | dst = args->value; |
| 1958 | valuelen = args->valuelen; |
| 1959 | lblkno = args->rmtblkno; |
| 1960 | while (valuelen > 0) { |
| 1961 | nmap = ATTR_RMTVALUE_MAPSIZE; |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 1962 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, |
| 1963 | args->rmtblkcnt, map, &nmap, |
| 1964 | XFS_BMAPI_ATTRFORK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | if (error) |
| 1966 | return(error); |
| 1967 | ASSERT(nmap >= 1); |
| 1968 | |
| 1969 | for (i = 0; (i < nmap) && (valuelen > 0); i++) { |
| 1970 | ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) && |
| 1971 | (map[i].br_startblock != HOLESTARTBLOCK)); |
| 1972 | dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); |
| 1973 | blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); |
| 1974 | error = xfs_read_buf(mp, mp->m_ddev_targp, dblkno, |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 1975 | blkcnt, XBF_LOCK | XBF_DONT_BLOCK, |
Christoph Hellwig | ddd3a14 | 2009-07-18 18:15:01 -0400 | [diff] [blame] | 1976 | &bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | if (error) |
| 1978 | return(error); |
| 1979 | |
| 1980 | tmp = (valuelen < XFS_BUF_SIZE(bp)) |
| 1981 | ? valuelen : XFS_BUF_SIZE(bp); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 1982 | xfs_buf_iomove(bp, 0, tmp, dst, XBRW_READ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | xfs_buf_relse(bp); |
| 1984 | dst += tmp; |
| 1985 | valuelen -= tmp; |
| 1986 | |
| 1987 | lblkno += map[i].br_blockcount; |
| 1988 | } |
| 1989 | } |
| 1990 | ASSERT(valuelen == 0); |
| 1991 | return(0); |
| 1992 | } |
| 1993 | |
| 1994 | /* |
| 1995 | * Write the value associated with an attribute into the out-of-line buffer |
| 1996 | * that we have defined for it. |
| 1997 | */ |
| 1998 | STATIC int |
| 1999 | xfs_attr_rmtval_set(xfs_da_args_t *args) |
| 2000 | { |
| 2001 | xfs_mount_t *mp; |
| 2002 | xfs_fileoff_t lfileoff; |
| 2003 | xfs_inode_t *dp; |
| 2004 | xfs_bmbt_irec_t map; |
| 2005 | xfs_daddr_t dblkno; |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 2006 | void *src; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | xfs_buf_t *bp; |
| 2008 | xfs_dablk_t lblkno; |
| 2009 | int blkcnt, valuelen, nmap, error, tmp, committed; |
| 2010 | |
| 2011 | dp = args->dp; |
| 2012 | mp = dp->i_mount; |
| 2013 | src = args->value; |
| 2014 | |
| 2015 | /* |
| 2016 | * Find a "hole" in the attribute address space large enough for |
| 2017 | * us to drop the new attribute's value into. |
| 2018 | */ |
| 2019 | blkcnt = XFS_B_TO_FSB(mp, args->valuelen); |
| 2020 | lfileoff = 0; |
| 2021 | error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff, |
| 2022 | XFS_ATTR_FORK); |
| 2023 | if (error) { |
| 2024 | return(error); |
| 2025 | } |
| 2026 | args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff; |
| 2027 | args->rmtblkcnt = blkcnt; |
| 2028 | |
| 2029 | /* |
| 2030 | * Roll through the "value", allocating blocks on disk as required. |
| 2031 | */ |
| 2032 | while (blkcnt > 0) { |
| 2033 | /* |
| 2034 | * Allocate a single extent, up to the size of the value. |
| 2035 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 2036 | xfs_bmap_init(args->flist, args->firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2037 | nmap = 1; |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 2038 | error = xfs_bmapi_write(args->trans, dp, (xfs_fileoff_t)lblkno, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | blkcnt, |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 2040 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | args->firstblock, args->total, &map, &nmap, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2042 | args->flist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | if (!error) { |
| 2044 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 2045 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | } |
| 2047 | if (error) { |
| 2048 | ASSERT(committed); |
| 2049 | args->trans = NULL; |
| 2050 | xfs_bmap_cancel(args->flist); |
| 2051 | return(error); |
| 2052 | } |
| 2053 | |
| 2054 | /* |
| 2055 | * bmap_finish() may have committed the last trans and started |
| 2056 | * a new one. We need the inode to be in all transactions. |
| 2057 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 2058 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 2059 | xfs_trans_ijoin(args->trans, dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2060 | |
| 2061 | ASSERT(nmap == 1); |
| 2062 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 2063 | (map.br_startblock != HOLESTARTBLOCK)); |
| 2064 | lblkno += map.br_blockcount; |
| 2065 | blkcnt -= map.br_blockcount; |
| 2066 | |
| 2067 | /* |
| 2068 | * Start the next trans in the chain. |
| 2069 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 2070 | error = xfs_trans_roll(&args->trans, dp); |
| 2071 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | return (error); |
| 2073 | } |
| 2074 | |
| 2075 | /* |
| 2076 | * Roll through the "value", copying the attribute value to the |
| 2077 | * already-allocated blocks. Blocks are written synchronously |
| 2078 | * so that we can know they are all on disk before we turn off |
| 2079 | * the INCOMPLETE flag. |
| 2080 | */ |
| 2081 | lblkno = args->rmtblkno; |
| 2082 | valuelen = args->valuelen; |
| 2083 | while (valuelen > 0) { |
| 2084 | /* |
| 2085 | * Try to remember where we decided to put the value. |
| 2086 | */ |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 2087 | xfs_bmap_init(args->flist, args->firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | nmap = 1; |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 2089 | error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno, |
| 2090 | args->rmtblkcnt, &map, &nmap, |
| 2091 | XFS_BMAPI_ATTRFORK); |
| 2092 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | return(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | ASSERT(nmap == 1); |
| 2095 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 2096 | (map.br_startblock != HOLESTARTBLOCK)); |
| 2097 | |
| 2098 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), |
| 2099 | blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
| 2100 | |
Christoph Hellwig | 6ad112b | 2009-11-24 18:02:23 +0000 | [diff] [blame] | 2101 | bp = xfs_buf_get(mp->m_ddev_targp, dblkno, blkcnt, |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 2102 | XBF_LOCK | XBF_DONT_BLOCK); |
Chandra Seetharaman | b522950 | 2011-09-07 19:37:54 +0000 | [diff] [blame] | 2103 | if (!bp) |
| 2104 | return ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | tmp = (valuelen < XFS_BUF_SIZE(bp)) ? valuelen : |
| 2106 | XFS_BUF_SIZE(bp); |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 2107 | xfs_buf_iomove(bp, 0, tmp, src, XBRW_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | if (tmp < XFS_BUF_SIZE(bp)) |
Christoph Hellwig | 1a1a3e9 | 2010-10-06 18:41:18 +0000 | [diff] [blame] | 2109 | xfs_buf_zero(bp, tmp, XFS_BUF_SIZE(bp) - tmp); |
Christoph Hellwig | c2b006c | 2011-08-23 08:28:07 +0000 | [diff] [blame] | 2110 | error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */ |
| 2111 | xfs_buf_relse(bp); |
| 2112 | if (error) |
| 2113 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | src += tmp; |
| 2115 | valuelen -= tmp; |
| 2116 | |
| 2117 | lblkno += map.br_blockcount; |
| 2118 | } |
| 2119 | ASSERT(valuelen == 0); |
| 2120 | return(0); |
| 2121 | } |
| 2122 | |
| 2123 | /* |
| 2124 | * Remove the value associated with an attribute by deleting the |
| 2125 | * out-of-line buffer that it is stored on. |
| 2126 | */ |
| 2127 | STATIC int |
| 2128 | xfs_attr_rmtval_remove(xfs_da_args_t *args) |
| 2129 | { |
| 2130 | xfs_mount_t *mp; |
| 2131 | xfs_bmbt_irec_t map; |
| 2132 | xfs_buf_t *bp; |
| 2133 | xfs_daddr_t dblkno; |
| 2134 | xfs_dablk_t lblkno; |
| 2135 | int valuelen, blkcnt, nmap, error, done, committed; |
| 2136 | |
| 2137 | mp = args->dp->i_mount; |
| 2138 | |
| 2139 | /* |
| 2140 | * Roll through the "value", invalidating the attribute value's |
| 2141 | * blocks. |
| 2142 | */ |
| 2143 | lblkno = args->rmtblkno; |
| 2144 | valuelen = args->rmtblkcnt; |
| 2145 | while (valuelen > 0) { |
| 2146 | /* |
| 2147 | * Try to remember where we decided to put the value. |
| 2148 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | nmap = 1; |
Dave Chinner | 5c8ed20 | 2011-09-18 20:40:45 +0000 | [diff] [blame] | 2150 | error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno, |
| 2151 | args->rmtblkcnt, &map, &nmap, |
| 2152 | XFS_BMAPI_ATTRFORK); |
| 2153 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | return(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | ASSERT(nmap == 1); |
| 2156 | ASSERT((map.br_startblock != DELAYSTARTBLOCK) && |
| 2157 | (map.br_startblock != HOLESTARTBLOCK)); |
| 2158 | |
| 2159 | dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), |
| 2160 | blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); |
| 2161 | |
| 2162 | /* |
| 2163 | * If the "remote" value is in the cache, remove it. |
| 2164 | */ |
Christoph Hellwig | 0cadda1 | 2010-01-19 09:56:44 +0000 | [diff] [blame] | 2165 | bp = xfs_incore(mp->m_ddev_targp, dblkno, blkcnt, XBF_TRYLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2166 | if (bp) { |
Christoph Hellwig | c867cb6 | 2011-10-10 16:52:46 +0000 | [diff] [blame] | 2167 | xfs_buf_stale(bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | xfs_buf_relse(bp); |
| 2169 | bp = NULL; |
| 2170 | } |
| 2171 | |
| 2172 | valuelen -= map.br_blockcount; |
| 2173 | |
| 2174 | lblkno += map.br_blockcount; |
| 2175 | } |
| 2176 | |
| 2177 | /* |
| 2178 | * Keep de-allocating extents until the remote-value region is gone. |
| 2179 | */ |
| 2180 | lblkno = args->rmtblkno; |
| 2181 | blkcnt = args->rmtblkcnt; |
| 2182 | done = 0; |
| 2183 | while (!done) { |
Eric Sandeen | 9d87c31 | 2009-01-14 23:22:07 -0600 | [diff] [blame] | 2184 | xfs_bmap_init(args->flist, args->firstblock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt, |
| 2186 | XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA, |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2187 | 1, args->firstblock, args->flist, |
Christoph Hellwig | b4e9181 | 2010-06-23 18:11:15 +1000 | [diff] [blame] | 2188 | &done); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | if (!error) { |
| 2190 | error = xfs_bmap_finish(&args->trans, args->flist, |
Eric Sandeen | f7c99b6 | 2007-02-10 18:37:16 +1100 | [diff] [blame] | 2191 | &committed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | } |
| 2193 | if (error) { |
| 2194 | ASSERT(committed); |
| 2195 | args->trans = NULL; |
| 2196 | xfs_bmap_cancel(args->flist); |
| 2197 | return(error); |
| 2198 | } |
| 2199 | |
| 2200 | /* |
| 2201 | * bmap_finish() may have committed the last trans and started |
| 2202 | * a new one. We need the inode to be in all transactions. |
| 2203 | */ |
Christoph Hellwig | 898621d | 2010-06-24 11:36:58 +1000 | [diff] [blame] | 2204 | if (committed) |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 2205 | xfs_trans_ijoin(args->trans, args->dp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | |
| 2207 | /* |
| 2208 | * Close out trans and start the next one in the chain. |
| 2209 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 2210 | error = xfs_trans_roll(&args->trans, args->dp); |
| 2211 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2212 | return (error); |
| 2213 | } |
| 2214 | return(0); |
| 2215 | } |