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. |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 3 | * Copyright (c) 2013 Red Hat, Inc. |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 4 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * published by the Free Software Foundation. |
| 9 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 10 | * This program is distributed in the hope that it would be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [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" |
Dave Chinner | 632b89e | 2013-10-29 22:11:58 +1100 | [diff] [blame] | 21 | #include "xfs_shared.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 22 | #include "xfs_format.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 23 | #include "xfs_log_format.h" |
| 24 | #include "xfs_trans_resv.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 25 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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" |
Dave Chinner | 5706278 | 2013-10-15 09:17:51 +1100 | [diff] [blame] | 29 | #include "xfs_da_format.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 30 | #include "xfs_da_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_inode.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 32 | #include "xfs_trans.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 33 | #include "xfs_inode_item.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 34 | #include "xfs_bmap_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_bmap.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 36 | #include "xfs_attr_sf.h" |
| 37 | #include "xfs_attr_remote.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include "xfs_attr.h" |
| 39 | #include "xfs_attr_leaf.h" |
| 40 | #include "xfs_error.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 41 | #include "xfs_trace.h" |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 42 | #include "xfs_buf_item.h" |
| 43 | #include "xfs_cksum.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 44 | #include "xfs_dinode.h" |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 45 | #include "xfs_dir2.h" |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | /* |
| 49 | * xfs_attr_leaf.c |
| 50 | * |
| 51 | * Routines to implement leaf blocks of attributes as Btrees of hashed names. |
| 52 | */ |
| 53 | |
| 54 | /*======================================================================== |
| 55 | * Function prototypes for the kernel. |
| 56 | *========================================================================*/ |
| 57 | |
| 58 | /* |
| 59 | * Routines used for growing the Btree. |
| 60 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 61 | STATIC int xfs_attr3_leaf_create(struct xfs_da_args *args, |
| 62 | xfs_dablk_t which_block, struct xfs_buf **bpp); |
| 63 | STATIC int xfs_attr3_leaf_add_work(struct xfs_buf *leaf_buffer, |
| 64 | struct xfs_attr3_icleaf_hdr *ichdr, |
| 65 | struct xfs_da_args *args, int freemap_index); |
| 66 | STATIC void xfs_attr3_leaf_compact(struct xfs_da_args *args, |
| 67 | struct xfs_attr3_icleaf_hdr *ichdr, |
| 68 | struct xfs_buf *leaf_buffer); |
| 69 | STATIC void xfs_attr3_leaf_rebalance(xfs_da_state_t *state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | xfs_da_state_blk_t *blk1, |
| 71 | xfs_da_state_blk_t *blk2); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 72 | STATIC int xfs_attr3_leaf_figure_balance(xfs_da_state_t *state, |
| 73 | xfs_da_state_blk_t *leaf_blk_1, |
| 74 | struct xfs_attr3_icleaf_hdr *ichdr1, |
| 75 | xfs_da_state_blk_t *leaf_blk_2, |
| 76 | struct xfs_attr3_icleaf_hdr *ichdr2, |
| 77 | int *number_entries_in_blk1, |
| 78 | int *number_usedbytes_in_blk1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | /* |
| 81 | * Utility routines. |
| 82 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 83 | STATIC void xfs_attr3_leaf_moveents(struct xfs_attr_leafblock *src_leaf, |
| 84 | struct xfs_attr3_icleaf_hdr *src_ichdr, int src_start, |
| 85 | struct xfs_attr_leafblock *dst_leaf, |
| 86 | struct xfs_attr3_icleaf_hdr *dst_ichdr, int dst_start, |
| 87 | int move_count, struct xfs_mount *mp); |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 88 | STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 89 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 90 | void |
| 91 | xfs_attr3_leaf_hdr_from_disk( |
| 92 | struct xfs_attr3_icleaf_hdr *to, |
| 93 | struct xfs_attr_leafblock *from) |
| 94 | { |
| 95 | int i; |
| 96 | |
| 97 | ASSERT(from->hdr.info.magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC) || |
| 98 | from->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)); |
| 99 | |
| 100 | if (from->hdr.info.magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)) { |
| 101 | struct xfs_attr3_leaf_hdr *hdr3 = (struct xfs_attr3_leaf_hdr *)from; |
| 102 | |
| 103 | to->forw = be32_to_cpu(hdr3->info.hdr.forw); |
| 104 | to->back = be32_to_cpu(hdr3->info.hdr.back); |
| 105 | to->magic = be16_to_cpu(hdr3->info.hdr.magic); |
| 106 | to->count = be16_to_cpu(hdr3->count); |
| 107 | to->usedbytes = be16_to_cpu(hdr3->usedbytes); |
| 108 | to->firstused = be16_to_cpu(hdr3->firstused); |
| 109 | to->holes = hdr3->holes; |
| 110 | |
| 111 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { |
| 112 | to->freemap[i].base = be16_to_cpu(hdr3->freemap[i].base); |
| 113 | to->freemap[i].size = be16_to_cpu(hdr3->freemap[i].size); |
| 114 | } |
| 115 | return; |
| 116 | } |
| 117 | to->forw = be32_to_cpu(from->hdr.info.forw); |
| 118 | to->back = be32_to_cpu(from->hdr.info.back); |
| 119 | to->magic = be16_to_cpu(from->hdr.info.magic); |
| 120 | to->count = be16_to_cpu(from->hdr.count); |
| 121 | to->usedbytes = be16_to_cpu(from->hdr.usedbytes); |
| 122 | to->firstused = be16_to_cpu(from->hdr.firstused); |
| 123 | to->holes = from->hdr.holes; |
| 124 | |
| 125 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { |
| 126 | to->freemap[i].base = be16_to_cpu(from->hdr.freemap[i].base); |
| 127 | to->freemap[i].size = be16_to_cpu(from->hdr.freemap[i].size); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | void |
| 132 | xfs_attr3_leaf_hdr_to_disk( |
| 133 | struct xfs_attr_leafblock *to, |
| 134 | struct xfs_attr3_icleaf_hdr *from) |
| 135 | { |
| 136 | int i; |
| 137 | |
| 138 | ASSERT(from->magic == XFS_ATTR_LEAF_MAGIC || |
| 139 | from->magic == XFS_ATTR3_LEAF_MAGIC); |
| 140 | |
| 141 | if (from->magic == XFS_ATTR3_LEAF_MAGIC) { |
| 142 | struct xfs_attr3_leaf_hdr *hdr3 = (struct xfs_attr3_leaf_hdr *)to; |
| 143 | |
| 144 | hdr3->info.hdr.forw = cpu_to_be32(from->forw); |
| 145 | hdr3->info.hdr.back = cpu_to_be32(from->back); |
| 146 | hdr3->info.hdr.magic = cpu_to_be16(from->magic); |
| 147 | hdr3->count = cpu_to_be16(from->count); |
| 148 | hdr3->usedbytes = cpu_to_be16(from->usedbytes); |
| 149 | hdr3->firstused = cpu_to_be16(from->firstused); |
| 150 | hdr3->holes = from->holes; |
| 151 | hdr3->pad1 = 0; |
| 152 | |
| 153 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { |
| 154 | hdr3->freemap[i].base = cpu_to_be16(from->freemap[i].base); |
| 155 | hdr3->freemap[i].size = cpu_to_be16(from->freemap[i].size); |
| 156 | } |
| 157 | return; |
| 158 | } |
| 159 | to->hdr.info.forw = cpu_to_be32(from->forw); |
| 160 | to->hdr.info.back = cpu_to_be32(from->back); |
| 161 | to->hdr.info.magic = cpu_to_be16(from->magic); |
| 162 | to->hdr.count = cpu_to_be16(from->count); |
| 163 | to->hdr.usedbytes = cpu_to_be16(from->usedbytes); |
| 164 | to->hdr.firstused = cpu_to_be16(from->firstused); |
| 165 | to->hdr.holes = from->holes; |
| 166 | to->hdr.pad1 = 0; |
| 167 | |
| 168 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { |
| 169 | to->hdr.freemap[i].base = cpu_to_be16(from->freemap[i].base); |
| 170 | to->hdr.freemap[i].size = cpu_to_be16(from->freemap[i].size); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | static bool |
| 175 | xfs_attr3_leaf_verify( |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 176 | struct xfs_buf *bp) |
| 177 | { |
| 178 | struct xfs_mount *mp = bp->b_target->bt_mount; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 179 | struct xfs_attr_leafblock *leaf = bp->b_addr; |
| 180 | struct xfs_attr3_icleaf_hdr ichdr; |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 181 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 182 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
| 183 | |
| 184 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 185 | struct xfs_da3_node_hdr *hdr3 = bp->b_addr; |
| 186 | |
| 187 | if (ichdr.magic != XFS_ATTR3_LEAF_MAGIC) |
| 188 | return false; |
| 189 | |
| 190 | if (!uuid_equal(&hdr3->info.uuid, &mp->m_sb.sb_uuid)) |
| 191 | return false; |
| 192 | if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn) |
| 193 | return false; |
| 194 | } else { |
| 195 | if (ichdr.magic != XFS_ATTR_LEAF_MAGIC) |
| 196 | return false; |
| 197 | } |
| 198 | if (ichdr.count == 0) |
| 199 | return false; |
| 200 | |
| 201 | /* XXX: need to range check rest of attr header values */ |
| 202 | /* XXX: hash order check? */ |
| 203 | |
| 204 | return true; |
| 205 | } |
| 206 | |
| 207 | static void |
| 208 | xfs_attr3_leaf_write_verify( |
| 209 | struct xfs_buf *bp) |
| 210 | { |
| 211 | struct xfs_mount *mp = bp->b_target->bt_mount; |
| 212 | struct xfs_buf_log_item *bip = bp->b_fspriv; |
| 213 | struct xfs_attr3_leaf_hdr *hdr3 = bp->b_addr; |
| 214 | |
| 215 | if (!xfs_attr3_leaf_verify(bp)) { |
| 216 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); |
| 217 | xfs_buf_ioerror(bp, EFSCORRUPTED); |
| 218 | return; |
| 219 | } |
| 220 | |
| 221 | if (!xfs_sb_version_hascrc(&mp->m_sb)) |
| 222 | return; |
| 223 | |
| 224 | if (bip) |
| 225 | hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn); |
| 226 | |
| 227 | xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_ATTR3_LEAF_CRC_OFF); |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * leaf/node format detection on trees is sketchy, so a node read can be done on |
| 232 | * leaf level blocks when detection identifies the tree as a node format tree |
| 233 | * incorrectly. In this case, we need to swap the verifier to match the correct |
| 234 | * format of the block being read. |
| 235 | */ |
| 236 | static void |
| 237 | xfs_attr3_leaf_read_verify( |
| 238 | struct xfs_buf *bp) |
| 239 | { |
| 240 | struct xfs_mount *mp = bp->b_target->bt_mount; |
| 241 | |
| 242 | if ((xfs_sb_version_hascrc(&mp->m_sb) && |
| 243 | !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length), |
| 244 | XFS_ATTR3_LEAF_CRC_OFF)) || |
| 245 | !xfs_attr3_leaf_verify(bp)) { |
| 246 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 247 | xfs_buf_ioerror(bp, EFSCORRUPTED); |
| 248 | } |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 249 | } |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 250 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 251 | const struct xfs_buf_ops xfs_attr3_leaf_buf_ops = { |
| 252 | .verify_read = xfs_attr3_leaf_read_verify, |
| 253 | .verify_write = xfs_attr3_leaf_write_verify, |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 254 | }; |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 255 | |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 256 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 257 | xfs_attr3_leaf_read( |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 258 | struct xfs_trans *tp, |
| 259 | struct xfs_inode *dp, |
| 260 | xfs_dablk_t bno, |
| 261 | xfs_daddr_t mappedbno, |
| 262 | struct xfs_buf **bpp) |
| 263 | { |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 264 | int err; |
| 265 | |
| 266 | err = xfs_da_read_buf(tp, dp, bno, mappedbno, bpp, |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 267 | XFS_ATTR_FORK, &xfs_attr3_leaf_buf_ops); |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 268 | if (!err && tp) |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 269 | xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_ATTR_LEAF_BUF); |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 270 | return err; |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 271 | } |
| 272 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 273 | /*======================================================================== |
| 274 | * Namespace helper routines |
| 275 | *========================================================================*/ |
| 276 | |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 277 | /* |
| 278 | * If namespace bits don't match return 0. |
| 279 | * If all match then return 1. |
| 280 | */ |
Christoph Hellwig | b8f82a4 | 2009-11-14 16:17:22 +0000 | [diff] [blame] | 281 | STATIC int |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 282 | xfs_attr_namesp_match(int arg_flags, int ondisk_flags) |
| 283 | { |
| 284 | return XFS_ATTR_NSP_ONDISK(ondisk_flags) == XFS_ATTR_NSP_ARGS_TO_ONDISK(arg_flags); |
| 285 | } |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | /*======================================================================== |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 289 | * External routines when attribute fork size < XFS_LITINO(mp). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | *========================================================================*/ |
| 291 | |
| 292 | /* |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 293 | * Query whether the requested number of additional bytes of extended |
| 294 | * attribute space will be able to fit inline. |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 295 | * |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 296 | * Returns zero if not, else the di_forkoff fork offset to be used in the |
| 297 | * literal area for attribute data once the new bytes have been added. |
| 298 | * |
| 299 | * di_forkoff must be 8 byte aligned, hence is stored as a >>3 value; |
| 300 | * special case for dev/uuid inodes, they have fixed size data forks. |
| 301 | */ |
| 302 | int |
| 303 | xfs_attr_shortform_bytesfit(xfs_inode_t *dp, int bytes) |
| 304 | { |
| 305 | int offset; |
| 306 | int minforkoff; /* lower limit on valid forkoff locations */ |
| 307 | int maxforkoff; /* upper limit on valid forkoff locations */ |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 308 | int dsize; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 309 | xfs_mount_t *mp = dp->i_mount; |
| 310 | |
Christoph Hellwig | 56cea2d | 2013-03-12 23:30:36 +1100 | [diff] [blame] | 311 | /* rounded down */ |
| 312 | offset = (XFS_LITINO(mp, dp->i_d.di_version) - bytes) >> 3; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 313 | |
| 314 | switch (dp->i_d.di_format) { |
| 315 | case XFS_DINODE_FMT_DEV: |
| 316 | minforkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; |
| 317 | return (offset >= minforkoff) ? minforkoff : 0; |
| 318 | case XFS_DINODE_FMT_UUID: |
| 319 | minforkoff = roundup(sizeof(uuid_t), 8) >> 3; |
| 320 | return (offset >= minforkoff) ? minforkoff : 0; |
| 321 | } |
| 322 | |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 323 | /* |
| 324 | * If the requested numbers of bytes is smaller or equal to the |
| 325 | * current attribute fork size we can always proceed. |
| 326 | * |
| 327 | * Note that if_bytes in the data fork might actually be larger than |
| 328 | * the current data fork size is due to delalloc extents. In that |
| 329 | * case either the extent count will go down when they are converted |
| 330 | * to real extents, or the delalloc conversion will take care of the |
| 331 | * literal area rebalancing. |
| 332 | */ |
| 333 | if (bytes <= XFS_IFORK_ASIZE(dp)) |
| 334 | return dp->i_d.di_forkoff; |
| 335 | |
| 336 | /* |
| 337 | * For attr2 we can try to move the forkoff if there is space in the |
| 338 | * literal area, but for the old format we are done if there is no |
| 339 | * space in the fixed attribute fork. |
| 340 | */ |
| 341 | if (!(mp->m_flags & XFS_MOUNT_ATTR2)) |
Nathan Scott | da087ba | 2005-11-02 15:00:20 +1100 | [diff] [blame] | 342 | return 0; |
Nathan Scott | da087ba | 2005-11-02 15:00:20 +1100 | [diff] [blame] | 343 | |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 344 | dsize = dp->i_df.if_bytes; |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 345 | |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 346 | switch (dp->i_d.di_format) { |
| 347 | case XFS_DINODE_FMT_EXTENTS: |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 348 | /* |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 349 | * If there is no attr fork and the data fork is extents, |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 350 | * determine if creating the default attr fork will result |
| 351 | * in the extents form migrating to btree. If so, the |
| 352 | * minimum offset only needs to be the space required for |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 353 | * the btree root. |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 354 | */ |
Christoph Hellwig | 1a5902c | 2009-03-29 19:26:46 +0200 | [diff] [blame] | 355 | if (!dp->i_d.di_forkoff && dp->i_df.if_bytes > |
| 356 | xfs_default_attroffset(dp)) |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 357 | dsize = XFS_BMDR_SPACE_CALC(MINDBTPTRS); |
| 358 | break; |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 359 | case XFS_DINODE_FMT_BTREE: |
| 360 | /* |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 361 | * If we have a data btree then keep forkoff if we have one, |
| 362 | * otherwise we are adding a new attr, so then we set |
| 363 | * minforkoff to where the btree root can finish so we have |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 364 | * plenty of room for attrs |
| 365 | */ |
| 366 | if (dp->i_d.di_forkoff) { |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 367 | if (offset < dp->i_d.di_forkoff) |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 368 | return 0; |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 369 | return dp->i_d.di_forkoff; |
| 370 | } |
Christoph Hellwig | ee1a47a | 2013-04-21 14:53:46 -0500 | [diff] [blame] | 371 | dsize = XFS_BMAP_BROOT_SPACE(mp, dp->i_df.if_broot); |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 372 | break; |
| 373 | } |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 374 | |
| 375 | /* |
| 376 | * A data fork btree root must have space for at least |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 377 | * MINDBTPTRS key/ptr pairs if the data fork is small or empty. |
| 378 | */ |
| 379 | minforkoff = MAX(dsize, XFS_BMDR_SPACE_CALC(MINDBTPTRS)); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 380 | minforkoff = roundup(minforkoff, 8) >> 3; |
| 381 | |
| 382 | /* attr fork btree root can have at least this many key/ptr pairs */ |
Christoph Hellwig | 56cea2d | 2013-03-12 23:30:36 +1100 | [diff] [blame] | 383 | maxforkoff = XFS_LITINO(mp, dp->i_d.di_version) - |
| 384 | XFS_BMDR_SPACE_CALC(MINABTPTRS); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 385 | maxforkoff = maxforkoff >> 3; /* rounded down */ |
| 386 | |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 387 | if (offset >= maxforkoff) |
| 388 | return maxforkoff; |
Christoph Hellwig | 4c393a6 | 2011-11-19 17:44:30 +0000 | [diff] [blame] | 389 | if (offset >= minforkoff) |
| 390 | return offset; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 391 | return 0; |
| 392 | } |
| 393 | |
| 394 | /* |
| 395 | * Switch on the ATTR2 superblock bit (implies also FEATURES2) |
| 396 | */ |
| 397 | STATIC void |
| 398 | xfs_sbversion_add_attr2(xfs_mount_t *mp, xfs_trans_t *tp) |
| 399 | { |
Nathan Scott | 13059ff | 2006-01-11 15:32:01 +1100 | [diff] [blame] | 400 | if ((mp->m_flags & XFS_MOUNT_ATTR2) && |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 401 | !(xfs_sb_version_hasattr2(&mp->m_sb))) { |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 402 | spin_lock(&mp->m_sb_lock); |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 403 | if (!xfs_sb_version_hasattr2(&mp->m_sb)) { |
| 404 | xfs_sb_version_addattr2(&mp->m_sb); |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 405 | spin_unlock(&mp->m_sb_lock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 406 | xfs_mod_sb(tp, XFS_SB_VERSIONNUM | XFS_SB_FEATURES2); |
| 407 | } else |
Eric Sandeen | 3685c2a | 2007-10-11 17:42:32 +1000 | [diff] [blame] | 408 | spin_unlock(&mp->m_sb_lock); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 409 | } |
| 410 | } |
| 411 | |
| 412 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | * Create the initial contents of a shortform attribute list. |
| 414 | */ |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 415 | void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | xfs_attr_shortform_create(xfs_da_args_t *args) |
| 417 | { |
| 418 | xfs_attr_sf_hdr_t *hdr; |
| 419 | xfs_inode_t *dp; |
| 420 | xfs_ifork_t *ifp; |
| 421 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 422 | trace_xfs_attr_sf_create(args); |
| 423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | dp = args->dp; |
| 425 | ASSERT(dp != NULL); |
| 426 | ifp = dp->i_afp; |
| 427 | ASSERT(ifp != NULL); |
| 428 | ASSERT(ifp->if_bytes == 0); |
| 429 | if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) { |
| 430 | ifp->if_flags &= ~XFS_IFEXTENTS; /* just in case */ |
| 431 | dp->i_d.di_aformat = XFS_DINODE_FMT_LOCAL; |
| 432 | ifp->if_flags |= XFS_IFINLINE; |
| 433 | } else { |
| 434 | ASSERT(ifp->if_flags & XFS_IFINLINE); |
| 435 | } |
| 436 | xfs_idata_realloc(dp, sizeof(*hdr), XFS_ATTR_FORK); |
| 437 | hdr = (xfs_attr_sf_hdr_t *)ifp->if_u1.if_data; |
| 438 | hdr->count = 0; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 439 | hdr->totsize = cpu_to_be16(sizeof(*hdr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | /* |
| 444 | * Add a name/value pair to the shortform attribute list. |
| 445 | * Overflow from the inode has already been checked for. |
| 446 | */ |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 447 | void |
| 448 | xfs_attr_shortform_add(xfs_da_args_t *args, int forkoff) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | { |
| 450 | xfs_attr_shortform_t *sf; |
| 451 | xfs_attr_sf_entry_t *sfe; |
| 452 | int i, offset, size; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 453 | xfs_mount_t *mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | xfs_inode_t *dp; |
| 455 | xfs_ifork_t *ifp; |
| 456 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 457 | trace_xfs_attr_sf_add(args); |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | dp = args->dp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 460 | mp = dp->i_mount; |
| 461 | dp->i_d.di_forkoff = forkoff; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | ifp = dp->i_afp; |
| 464 | ASSERT(ifp->if_flags & XFS_IFINLINE); |
| 465 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; |
| 466 | sfe = &sf->list[0]; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 467 | for (i = 0; i < sf->hdr.count; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 468 | #ifdef DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | if (sfe->namelen != args->namelen) |
| 470 | continue; |
| 471 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) |
| 472 | continue; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 473 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | continue; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 475 | ASSERT(0); |
| 476 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | offset = (char *)sfe - (char *)sf; |
| 480 | size = XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen); |
| 481 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); |
| 482 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; |
| 483 | sfe = (xfs_attr_sf_entry_t *)((char *)sf + offset); |
| 484 | |
| 485 | sfe->namelen = args->namelen; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 486 | sfe->valuelen = args->valuelen; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 487 | sfe->flags = XFS_ATTR_NSP_ARGS_TO_ONDISK(args->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | memcpy(sfe->nameval, args->name, args->namelen); |
| 489 | memcpy(&sfe->nameval[args->namelen], args->value, args->valuelen); |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 490 | sf->hdr.count++; |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 491 | be16_add_cpu(&sf->hdr.totsize, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA); |
| 493 | |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 494 | xfs_sbversion_add_attr2(mp, args->trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | /* |
Christoph Hellwig | e1486de | 2009-02-04 09:36:00 +0100 | [diff] [blame] | 498 | * After the last attribute is removed revert to original inode format, |
| 499 | * making all literal area available to the data fork once more. |
| 500 | */ |
| 501 | STATIC void |
| 502 | xfs_attr_fork_reset( |
| 503 | struct xfs_inode *ip, |
| 504 | struct xfs_trans *tp) |
| 505 | { |
| 506 | xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
| 507 | ip->i_d.di_forkoff = 0; |
| 508 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; |
| 509 | |
| 510 | ASSERT(ip->i_d.di_anextents == 0); |
| 511 | ASSERT(ip->i_afp == NULL); |
| 512 | |
Christoph Hellwig | e1486de | 2009-02-04 09:36:00 +0100 | [diff] [blame] | 513 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 514 | } |
| 515 | |
| 516 | /* |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 517 | * Remove an attribute from the shortform attribute list structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | */ |
| 519 | int |
| 520 | xfs_attr_shortform_remove(xfs_da_args_t *args) |
| 521 | { |
| 522 | xfs_attr_shortform_t *sf; |
| 523 | xfs_attr_sf_entry_t *sfe; |
| 524 | int base, size=0, end, totsize, i; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 525 | xfs_mount_t *mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | xfs_inode_t *dp; |
| 527 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 528 | trace_xfs_attr_sf_remove(args); |
| 529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | dp = args->dp; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 531 | mp = dp->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | base = sizeof(xfs_attr_sf_hdr_t); |
| 533 | sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data; |
| 534 | sfe = &sf->list[0]; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 535 | end = sf->hdr.count; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 536 | for (i = 0; i < end; sfe = XFS_ATTR_SF_NEXTENTRY(sfe), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | base += size, i++) { |
| 538 | size = XFS_ATTR_SF_ENTSIZE(sfe); |
| 539 | if (sfe->namelen != args->namelen) |
| 540 | continue; |
| 541 | if (memcmp(sfe->nameval, args->name, args->namelen) != 0) |
| 542 | continue; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 543 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | continue; |
| 545 | break; |
| 546 | } |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 547 | if (i == end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | return(XFS_ERROR(ENOATTR)); |
| 549 | |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 550 | /* |
| 551 | * Fix up the attribute fork data, covering the hole |
| 552 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | end = base + size; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 554 | totsize = be16_to_cpu(sf->hdr.totsize); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 555 | if (end != totsize) |
| 556 | memmove(&((char *)sf)[base], &((char *)sf)[end], totsize - end); |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 557 | sf->hdr.count--; |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 558 | be16_add_cpu(&sf->hdr.totsize, -size); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 559 | |
| 560 | /* |
| 561 | * Fix up the start offset of the attribute fork |
| 562 | */ |
| 563 | totsize -= size; |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 564 | if (totsize == sizeof(xfs_attr_sf_hdr_t) && |
Christoph Hellwig | e1486de | 2009-02-04 09:36:00 +0100 | [diff] [blame] | 565 | (mp->m_flags & XFS_MOUNT_ATTR2) && |
| 566 | (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) && |
| 567 | !(args->op_flags & XFS_DA_OP_ADDNAME)) { |
| 568 | xfs_attr_fork_reset(dp, args->trans); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 569 | } else { |
| 570 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); |
| 571 | dp->i_d.di_forkoff = xfs_attr_shortform_bytesfit(dp, totsize); |
| 572 | ASSERT(dp->i_d.di_forkoff); |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 573 | ASSERT(totsize > sizeof(xfs_attr_sf_hdr_t) || |
| 574 | (args->op_flags & XFS_DA_OP_ADDNAME) || |
| 575 | !(mp->m_flags & XFS_MOUNT_ATTR2) || |
| 576 | dp->i_d.di_format == XFS_DINODE_FMT_BTREE); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 577 | xfs_trans_log_inode(args->trans, dp, |
| 578 | XFS_ILOG_CORE | XFS_ILOG_ADATA); |
| 579 | } |
| 580 | |
| 581 | xfs_sbversion_add_attr2(mp, args->trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
| 583 | return(0); |
| 584 | } |
| 585 | |
| 586 | /* |
| 587 | * Look up a name in a shortform attribute list structure. |
| 588 | */ |
| 589 | /*ARGSUSED*/ |
| 590 | int |
| 591 | xfs_attr_shortform_lookup(xfs_da_args_t *args) |
| 592 | { |
| 593 | xfs_attr_shortform_t *sf; |
| 594 | xfs_attr_sf_entry_t *sfe; |
| 595 | int i; |
| 596 | xfs_ifork_t *ifp; |
| 597 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 598 | trace_xfs_attr_sf_lookup(args); |
| 599 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | ifp = args->dp->i_afp; |
| 601 | ASSERT(ifp->if_flags & XFS_IFINLINE); |
| 602 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; |
| 603 | sfe = &sf->list[0]; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 604 | for (i = 0; i < sf->hdr.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
| 606 | if (sfe->namelen != args->namelen) |
| 607 | continue; |
| 608 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) |
| 609 | continue; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 610 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | continue; |
| 612 | return(XFS_ERROR(EEXIST)); |
| 613 | } |
| 614 | return(XFS_ERROR(ENOATTR)); |
| 615 | } |
| 616 | |
| 617 | /* |
| 618 | * Look up a name in a shortform attribute list structure. |
| 619 | */ |
| 620 | /*ARGSUSED*/ |
| 621 | int |
| 622 | xfs_attr_shortform_getvalue(xfs_da_args_t *args) |
| 623 | { |
| 624 | xfs_attr_shortform_t *sf; |
| 625 | xfs_attr_sf_entry_t *sfe; |
| 626 | int i; |
| 627 | |
Eric Sandeen | 914ed44 | 2012-03-30 11:24:11 -0500 | [diff] [blame] | 628 | ASSERT(args->dp->i_afp->if_flags == XFS_IFINLINE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | sf = (xfs_attr_shortform_t *)args->dp->i_afp->if_u1.if_data; |
| 630 | sfe = &sf->list[0]; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 631 | for (i = 0; i < sf->hdr.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { |
| 633 | if (sfe->namelen != args->namelen) |
| 634 | continue; |
| 635 | if (memcmp(args->name, sfe->nameval, args->namelen) != 0) |
| 636 | continue; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 637 | if (!xfs_attr_namesp_match(args->flags, sfe->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | continue; |
| 639 | if (args->flags & ATTR_KERNOVAL) { |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 640 | args->valuelen = sfe->valuelen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | return(XFS_ERROR(EEXIST)); |
| 642 | } |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 643 | if (args->valuelen < sfe->valuelen) { |
| 644 | args->valuelen = sfe->valuelen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | return(XFS_ERROR(ERANGE)); |
| 646 | } |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 647 | args->valuelen = sfe->valuelen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | memcpy(args->value, &sfe->nameval[args->namelen], |
| 649 | args->valuelen); |
| 650 | return(XFS_ERROR(EEXIST)); |
| 651 | } |
| 652 | return(XFS_ERROR(ENOATTR)); |
| 653 | } |
| 654 | |
| 655 | /* |
| 656 | * Convert from using the shortform to the leaf. |
| 657 | */ |
| 658 | int |
| 659 | xfs_attr_shortform_to_leaf(xfs_da_args_t *args) |
| 660 | { |
| 661 | xfs_inode_t *dp; |
| 662 | xfs_attr_shortform_t *sf; |
| 663 | xfs_attr_sf_entry_t *sfe; |
| 664 | xfs_da_args_t nargs; |
| 665 | char *tmpbuffer; |
| 666 | int error, i, size; |
| 667 | xfs_dablk_t blkno; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 668 | struct xfs_buf *bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | xfs_ifork_t *ifp; |
| 670 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 671 | trace_xfs_attr_sf_to_leaf(args); |
| 672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | dp = args->dp; |
| 674 | ifp = dp->i_afp; |
| 675 | sf = (xfs_attr_shortform_t *)ifp->if_u1.if_data; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 676 | size = be16_to_cpu(sf->hdr.totsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | tmpbuffer = kmem_alloc(size, KM_SLEEP); |
| 678 | ASSERT(tmpbuffer != NULL); |
| 679 | memcpy(tmpbuffer, ifp->if_u1.if_data, size); |
| 680 | sf = (xfs_attr_shortform_t *)tmpbuffer; |
| 681 | |
| 682 | xfs_idata_realloc(dp, -size, XFS_ATTR_FORK); |
Dave Chinner | f3508bc | 2013-07-10 07:04:00 +1000 | [diff] [blame] | 683 | xfs_bmap_local_to_extents_empty(dp, XFS_ATTR_FORK); |
| 684 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | bp = NULL; |
| 686 | error = xfs_da_grow_inode(args, &blkno); |
| 687 | if (error) { |
| 688 | /* |
| 689 | * If we hit an IO error middle of the transaction inside |
| 690 | * grow_inode(), we may have inconsistent data. Bail out. |
| 691 | */ |
| 692 | if (error == EIO) |
| 693 | goto out; |
| 694 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ |
| 695 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ |
| 696 | goto out; |
| 697 | } |
| 698 | |
| 699 | ASSERT(blkno == 0); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 700 | error = xfs_attr3_leaf_create(args, blkno, &bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | if (error) { |
| 702 | error = xfs_da_shrink_inode(args, 0, bp); |
| 703 | bp = NULL; |
| 704 | if (error) |
| 705 | goto out; |
| 706 | xfs_idata_realloc(dp, size, XFS_ATTR_FORK); /* try to put */ |
| 707 | memcpy(ifp->if_u1.if_data, tmpbuffer, size); /* it back */ |
| 708 | goto out; |
| 709 | } |
| 710 | |
| 711 | memset((char *)&nargs, 0, sizeof(nargs)); |
| 712 | nargs.dp = dp; |
| 713 | nargs.firstblock = args->firstblock; |
| 714 | nargs.flist = args->flist; |
| 715 | nargs.total = args->total; |
| 716 | nargs.whichfork = XFS_ATTR_FORK; |
| 717 | nargs.trans = args->trans; |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 718 | nargs.op_flags = XFS_DA_OP_OKNOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | |
| 720 | sfe = &sf->list[0]; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 721 | for (i = 0; i < sf->hdr.count; i++) { |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 722 | nargs.name = sfe->nameval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | nargs.namelen = sfe->namelen; |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 724 | nargs.value = &sfe->nameval[nargs.namelen]; |
Nathan Scott | 3b244aa | 2006-03-17 17:29:25 +1100 | [diff] [blame] | 725 | nargs.valuelen = sfe->valuelen; |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 726 | nargs.hashval = xfs_da_hashname(sfe->nameval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | sfe->namelen); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 728 | nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(sfe->flags); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 729 | error = xfs_attr3_leaf_lookup_int(bp, &nargs); /* set a->index */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | ASSERT(error == ENOATTR); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 731 | error = xfs_attr3_leaf_add(bp, &nargs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | ASSERT(error != ENOSPC); |
| 733 | if (error) |
| 734 | goto out; |
| 735 | sfe = XFS_ATTR_SF_NEXTENTRY(sfe); |
| 736 | } |
| 737 | error = 0; |
| 738 | |
| 739 | out: |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 740 | kmem_free(tmpbuffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | return(error); |
| 742 | } |
| 743 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | /* |
| 745 | * Check a leaf attribute block to see if all the entries would fit into |
| 746 | * a shortform attribute list. |
| 747 | */ |
| 748 | int |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 749 | xfs_attr_shortform_allfit( |
Dave Chinner | b38958d | 2013-05-20 09:51:14 +1000 | [diff] [blame] | 750 | struct xfs_buf *bp, |
| 751 | struct xfs_inode *dp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | { |
Dave Chinner | b38958d | 2013-05-20 09:51:14 +1000 | [diff] [blame] | 753 | struct xfs_attr_leafblock *leaf; |
| 754 | struct xfs_attr_leaf_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | xfs_attr_leaf_name_local_t *name_loc; |
Dave Chinner | b38958d | 2013-05-20 09:51:14 +1000 | [diff] [blame] | 756 | struct xfs_attr3_icleaf_hdr leafhdr; |
| 757 | int bytes; |
| 758 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 760 | leaf = bp->b_addr; |
Dave Chinner | b38958d | 2013-05-20 09:51:14 +1000 | [diff] [blame] | 761 | xfs_attr3_leaf_hdr_from_disk(&leafhdr, leaf); |
| 762 | entry = xfs_attr3_leaf_entryp(leaf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | bytes = sizeof(struct xfs_attr_sf_hdr); |
Dave Chinner | b38958d | 2013-05-20 09:51:14 +1000 | [diff] [blame] | 765 | for (i = 0; i < leafhdr.count; entry++, i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
| 767 | continue; /* don't copy partial entries */ |
| 768 | if (!(entry->flags & XFS_ATTR_LOCAL)) |
| 769 | return(0); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 770 | name_loc = xfs_attr3_leaf_name_local(leaf, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | if (name_loc->namelen >= XFS_ATTR_SF_ENTSIZE_MAX) |
| 772 | return(0); |
Nathan Scott | 053b575 | 2006-03-17 17:29:09 +1100 | [diff] [blame] | 773 | if (be16_to_cpu(name_loc->valuelen) >= XFS_ATTR_SF_ENTSIZE_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | return(0); |
Dave Chinner | b38958d | 2013-05-20 09:51:14 +1000 | [diff] [blame] | 775 | bytes += sizeof(struct xfs_attr_sf_entry) - 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | + name_loc->namelen |
Nathan Scott | 053b575 | 2006-03-17 17:29:09 +1100 | [diff] [blame] | 777 | + be16_to_cpu(name_loc->valuelen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | } |
Nathan Scott | 13059ff | 2006-01-11 15:32:01 +1100 | [diff] [blame] | 779 | if ((dp->i_mount->m_flags & XFS_MOUNT_ATTR2) && |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 780 | (dp->i_d.di_format != XFS_DINODE_FMT_BTREE) && |
Nathan Scott | e0144ca | 2005-11-25 16:42:22 +1100 | [diff] [blame] | 781 | (bytes == sizeof(struct xfs_attr_sf_hdr))) |
Dave Chinner | b38958d | 2013-05-20 09:51:14 +1000 | [diff] [blame] | 782 | return -1; |
| 783 | return xfs_attr_shortform_bytesfit(dp, bytes); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | } |
| 785 | |
| 786 | /* |
| 787 | * Convert a leaf attribute list to shortform attribute list |
| 788 | */ |
| 789 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 790 | xfs_attr3_leaf_to_shortform( |
| 791 | struct xfs_buf *bp, |
| 792 | struct xfs_da_args *args, |
| 793 | int forkoff) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 795 | struct xfs_attr_leafblock *leaf; |
| 796 | struct xfs_attr3_icleaf_hdr ichdr; |
| 797 | struct xfs_attr_leaf_entry *entry; |
| 798 | struct xfs_attr_leaf_name_local *name_loc; |
| 799 | struct xfs_da_args nargs; |
| 800 | struct xfs_inode *dp = args->dp; |
| 801 | char *tmpbuffer; |
| 802 | int error; |
| 803 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 805 | trace_xfs_attr_leaf_to_sf(args); |
| 806 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | tmpbuffer = kmem_alloc(XFS_LBSIZE(dp->i_mount), KM_SLEEP); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 808 | if (!tmpbuffer) |
| 809 | return ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 811 | memcpy(tmpbuffer, bp->b_addr, XFS_LBSIZE(dp->i_mount)); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | leaf = (xfs_attr_leafblock_t *)tmpbuffer; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 814 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
| 815 | entry = xfs_attr3_leaf_entryp(leaf); |
| 816 | |
| 817 | /* XXX (dgc): buffer is about to be marked stale - why zero it? */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 818 | memset(bp->b_addr, 0, XFS_LBSIZE(dp->i_mount)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
| 820 | /* |
| 821 | * Clean out the prior contents of the attribute list. |
| 822 | */ |
| 823 | error = xfs_da_shrink_inode(args, 0, bp); |
| 824 | if (error) |
| 825 | goto out; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 826 | |
| 827 | if (forkoff == -1) { |
Nathan Scott | 13059ff | 2006-01-11 15:32:01 +1100 | [diff] [blame] | 828 | ASSERT(dp->i_mount->m_flags & XFS_MOUNT_ATTR2); |
Barry Naujok | e5889e9 | 2007-02-10 18:35:58 +1100 | [diff] [blame] | 829 | ASSERT(dp->i_d.di_format != XFS_DINODE_FMT_BTREE); |
Christoph Hellwig | e1486de | 2009-02-04 09:36:00 +0100 | [diff] [blame] | 830 | xfs_attr_fork_reset(dp, args->trans); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | goto out; |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | xfs_attr_shortform_create(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | |
| 836 | /* |
| 837 | * Copy the attributes |
| 838 | */ |
| 839 | memset((char *)&nargs, 0, sizeof(nargs)); |
| 840 | nargs.dp = dp; |
| 841 | nargs.firstblock = args->firstblock; |
| 842 | nargs.flist = args->flist; |
| 843 | nargs.total = args->total; |
| 844 | nargs.whichfork = XFS_ATTR_FORK; |
| 845 | nargs.trans = args->trans; |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 846 | nargs.op_flags = XFS_DA_OP_OKNOENT; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 847 | |
| 848 | for (i = 0; i < ichdr.count; entry++, i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | if (entry->flags & XFS_ATTR_INCOMPLETE) |
| 850 | continue; /* don't copy partial entries */ |
| 851 | if (!entry->nameidx) |
| 852 | continue; |
| 853 | ASSERT(entry->flags & XFS_ATTR_LOCAL); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 854 | name_loc = xfs_attr3_leaf_name_local(leaf, i); |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 855 | nargs.name = name_loc->nameval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | nargs.namelen = name_loc->namelen; |
Dave Chinner | a9273ca | 2010-01-20 10:47:48 +1100 | [diff] [blame] | 857 | nargs.value = &name_loc->nameval[nargs.namelen]; |
Nathan Scott | 053b575 | 2006-03-17 17:29:09 +1100 | [diff] [blame] | 858 | nargs.valuelen = be16_to_cpu(name_loc->valuelen); |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 859 | nargs.hashval = be32_to_cpu(entry->hashval); |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 860 | nargs.flags = XFS_ATTR_NSP_ONDISK_TO_ARGS(entry->flags); |
Nathan Scott | d8cc890 | 2005-11-02 10:34:53 +1100 | [diff] [blame] | 861 | xfs_attr_shortform_add(&nargs, forkoff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | } |
| 863 | error = 0; |
| 864 | |
| 865 | out: |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 866 | kmem_free(tmpbuffer); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 867 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | /* |
| 871 | * Convert from using a single leaf to a root node and a leaf. |
| 872 | */ |
| 873 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 874 | xfs_attr3_leaf_to_node( |
| 875 | struct xfs_da_args *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 877 | struct xfs_attr_leafblock *leaf; |
| 878 | struct xfs_attr3_icleaf_hdr icleafhdr; |
| 879 | struct xfs_attr_leaf_entry *entries; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 880 | struct xfs_da_node_entry *btree; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 881 | struct xfs_da3_icnode_hdr icnodehdr; |
| 882 | struct xfs_da_intnode *node; |
| 883 | struct xfs_inode *dp = args->dp; |
| 884 | struct xfs_mount *mp = dp->i_mount; |
| 885 | struct xfs_buf *bp1 = NULL; |
| 886 | struct xfs_buf *bp2 = NULL; |
| 887 | xfs_dablk_t blkno; |
| 888 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 890 | trace_xfs_attr_leaf_to_node(args); |
| 891 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | error = xfs_da_grow_inode(args, &blkno); |
| 893 | if (error) |
| 894 | goto out; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 895 | error = xfs_attr3_leaf_read(args->trans, dp, 0, -1, &bp1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | if (error) |
| 897 | goto out; |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 898 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 899 | error = xfs_da_get_buf(args->trans, dp, blkno, -1, &bp2, XFS_ATTR_FORK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | if (error) |
| 901 | goto out; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 902 | |
| 903 | /* copy leaf to new buffer, update identifiers */ |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 904 | xfs_trans_buf_set_type(args->trans, bp2, XFS_BLFT_ATTR_LEAF_BUF); |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 905 | bp2->b_ops = bp1->b_ops; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 906 | memcpy(bp2->b_addr, bp1->b_addr, XFS_LBSIZE(mp)); |
| 907 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 908 | struct xfs_da3_blkinfo *hdr3 = bp2->b_addr; |
| 909 | hdr3->blkno = cpu_to_be64(bp2->b_bn); |
| 910 | } |
| 911 | xfs_trans_log_buf(args->trans, bp2, 0, XFS_LBSIZE(mp) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | |
| 913 | /* |
| 914 | * Set up the new root node. |
| 915 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 916 | error = xfs_da3_node_create(args, 0, 1, &bp1, XFS_ATTR_FORK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | if (error) |
| 918 | goto out; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 919 | node = bp1->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 920 | dp->d_ops->node_hdr_from_disk(&icnodehdr, node); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 921 | btree = dp->d_ops->node_tree_p(node); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 922 | |
| 923 | leaf = bp2->b_addr; |
| 924 | xfs_attr3_leaf_hdr_from_disk(&icleafhdr, leaf); |
| 925 | entries = xfs_attr3_leaf_entryp(leaf); |
| 926 | |
| 927 | /* both on-disk, don't endian-flip twice */ |
| 928 | btree[0].hashval = entries[icleafhdr.count - 1].hashval; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 929 | btree[0].before = cpu_to_be32(blkno); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 930 | icnodehdr.count = 1; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 931 | dp->d_ops->node_hdr_to_disk(node, &icnodehdr); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 932 | xfs_trans_log_buf(args->trans, bp1, 0, XFS_LBSIZE(mp) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | error = 0; |
| 934 | out: |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 935 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | } |
| 937 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | /*======================================================================== |
| 939 | * Routines used for growing the Btree. |
| 940 | *========================================================================*/ |
| 941 | |
| 942 | /* |
| 943 | * Create the initial contents of a leaf attribute list |
| 944 | * or a leaf in a node attribute list. |
| 945 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 946 | STATIC int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 947 | xfs_attr3_leaf_create( |
| 948 | struct xfs_da_args *args, |
| 949 | xfs_dablk_t blkno, |
| 950 | struct xfs_buf **bpp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 952 | struct xfs_attr_leafblock *leaf; |
| 953 | struct xfs_attr3_icleaf_hdr ichdr; |
| 954 | struct xfs_inode *dp = args->dp; |
| 955 | struct xfs_mount *mp = dp->i_mount; |
| 956 | struct xfs_buf *bp; |
| 957 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 959 | trace_xfs_attr_leaf_create(args); |
| 960 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | error = xfs_da_get_buf(args->trans, args->dp, blkno, -1, &bp, |
| 962 | XFS_ATTR_FORK); |
| 963 | if (error) |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 964 | return error; |
| 965 | bp->b_ops = &xfs_attr3_leaf_buf_ops; |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 966 | xfs_trans_buf_set_type(args->trans, bp, XFS_BLFT_ATTR_LEAF_BUF); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 967 | leaf = bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 968 | memset(leaf, 0, XFS_LBSIZE(mp)); |
| 969 | |
| 970 | memset(&ichdr, 0, sizeof(ichdr)); |
| 971 | ichdr.firstused = XFS_LBSIZE(mp); |
| 972 | |
| 973 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 974 | struct xfs_da3_blkinfo *hdr3 = bp->b_addr; |
| 975 | |
| 976 | ichdr.magic = XFS_ATTR3_LEAF_MAGIC; |
| 977 | |
| 978 | hdr3->blkno = cpu_to_be64(bp->b_bn); |
| 979 | hdr3->owner = cpu_to_be64(dp->i_ino); |
| 980 | uuid_copy(&hdr3->uuid, &mp->m_sb.sb_uuid); |
| 981 | |
| 982 | ichdr.freemap[0].base = sizeof(struct xfs_attr3_leaf_hdr); |
| 983 | } else { |
| 984 | ichdr.magic = XFS_ATTR_LEAF_MAGIC; |
| 985 | ichdr.freemap[0].base = sizeof(struct xfs_attr_leaf_hdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 987 | ichdr.freemap[0].size = ichdr.firstused - ichdr.freemap[0].base; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 989 | xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr); |
| 990 | xfs_trans_log_buf(args->trans, bp, 0, XFS_LBSIZE(mp) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | |
| 992 | *bpp = bp; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 993 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | } |
| 995 | |
| 996 | /* |
| 997 | * Split the leaf node, rebalance, then add the new entry. |
| 998 | */ |
| 999 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1000 | xfs_attr3_leaf_split( |
| 1001 | struct xfs_da_state *state, |
| 1002 | struct xfs_da_state_blk *oldblk, |
| 1003 | struct xfs_da_state_blk *newblk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | { |
| 1005 | xfs_dablk_t blkno; |
| 1006 | int error; |
| 1007 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1008 | trace_xfs_attr_leaf_split(state->args); |
| 1009 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | /* |
| 1011 | * Allocate space for a new leaf node. |
| 1012 | */ |
| 1013 | ASSERT(oldblk->magic == XFS_ATTR_LEAF_MAGIC); |
| 1014 | error = xfs_da_grow_inode(state->args, &blkno); |
| 1015 | if (error) |
| 1016 | return(error); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1017 | error = xfs_attr3_leaf_create(state->args, blkno, &newblk->bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | if (error) |
| 1019 | return(error); |
| 1020 | newblk->blkno = blkno; |
| 1021 | newblk->magic = XFS_ATTR_LEAF_MAGIC; |
| 1022 | |
| 1023 | /* |
| 1024 | * Rebalance the entries across the two leaves. |
| 1025 | * NOTE: rebalance() currently depends on the 2nd block being empty. |
| 1026 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1027 | xfs_attr3_leaf_rebalance(state, oldblk, newblk); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1028 | error = xfs_da3_blk_link(state, oldblk, newblk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | if (error) |
| 1030 | return(error); |
| 1031 | |
| 1032 | /* |
| 1033 | * Save info on "old" attribute for "atomic rename" ops, leaf_add() |
| 1034 | * modifies the index/blkno/rmtblk/rmtblkcnt fields to show the |
| 1035 | * "new" attrs info. Will need the "old" info to remove it later. |
| 1036 | * |
| 1037 | * Insert the "new" entry in the correct block. |
| 1038 | */ |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1039 | if (state->inleaf) { |
| 1040 | trace_xfs_attr_leaf_add_old(state->args); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1041 | error = xfs_attr3_leaf_add(oldblk->bp, state->args); |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1042 | } else { |
| 1043 | trace_xfs_attr_leaf_add_new(state->args); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1044 | error = xfs_attr3_leaf_add(newblk->bp, state->args); |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1045 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | |
| 1047 | /* |
| 1048 | * Update last hashval in each block since we added the name. |
| 1049 | */ |
| 1050 | oldblk->hashval = xfs_attr_leaf_lasthash(oldblk->bp, NULL); |
| 1051 | newblk->hashval = xfs_attr_leaf_lasthash(newblk->bp, NULL); |
| 1052 | return(error); |
| 1053 | } |
| 1054 | |
| 1055 | /* |
| 1056 | * Add a name to the leaf attribute list structure. |
| 1057 | */ |
| 1058 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1059 | xfs_attr3_leaf_add( |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1060 | struct xfs_buf *bp, |
| 1061 | struct xfs_da_args *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1063 | struct xfs_attr_leafblock *leaf; |
| 1064 | struct xfs_attr3_icleaf_hdr ichdr; |
| 1065 | int tablesize; |
| 1066 | int entsize; |
| 1067 | int sum; |
| 1068 | int tmp; |
| 1069 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1071 | trace_xfs_attr_leaf_add(args); |
| 1072 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1073 | leaf = bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1074 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
| 1075 | ASSERT(args->index >= 0 && args->index <= ichdr.count); |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 1076 | entsize = xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | args->trans->t_mountp->m_sb.sb_blocksize, NULL); |
| 1078 | |
| 1079 | /* |
| 1080 | * Search through freemap for first-fit on new name length. |
| 1081 | * (may need to figure in size of entry struct too) |
| 1082 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1083 | tablesize = (ichdr.count + 1) * sizeof(xfs_attr_leaf_entry_t) |
| 1084 | + xfs_attr3_leaf_hdr_size(leaf); |
| 1085 | for (sum = 0, i = XFS_ATTR_LEAF_MAPSIZE - 1; i >= 0; i--) { |
| 1086 | if (tablesize > ichdr.firstused) { |
| 1087 | sum += ichdr.freemap[i].size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | continue; |
| 1089 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1090 | if (!ichdr.freemap[i].size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | continue; /* no space in this map */ |
| 1092 | tmp = entsize; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1093 | if (ichdr.freemap[i].base < ichdr.firstused) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | tmp += sizeof(xfs_attr_leaf_entry_t); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1095 | if (ichdr.freemap[i].size >= tmp) { |
| 1096 | tmp = xfs_attr3_leaf_add_work(bp, &ichdr, args, i); |
| 1097 | goto out_log_hdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1099 | sum += ichdr.freemap[i].size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | } |
| 1101 | |
| 1102 | /* |
| 1103 | * If there are no holes in the address space of the block, |
| 1104 | * and we don't have enough freespace, then compaction will do us |
| 1105 | * no good and we should just give up. |
| 1106 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1107 | if (!ichdr.holes && sum < entsize) |
| 1108 | return XFS_ERROR(ENOSPC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | |
| 1110 | /* |
| 1111 | * Compact the entries to coalesce free space. |
| 1112 | * This may change the hdr->count via dropping INCOMPLETE entries. |
| 1113 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1114 | xfs_attr3_leaf_compact(args, &ichdr, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | |
| 1116 | /* |
| 1117 | * After compaction, the block is guaranteed to have only one |
| 1118 | * free region, in freemap[0]. If it is not big enough, give up. |
| 1119 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1120 | if (ichdr.freemap[0].size < (entsize + sizeof(xfs_attr_leaf_entry_t))) { |
| 1121 | tmp = ENOSPC; |
| 1122 | goto out_log_hdr; |
| 1123 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1125 | tmp = xfs_attr3_leaf_add_work(bp, &ichdr, args, 0); |
| 1126 | |
| 1127 | out_log_hdr: |
| 1128 | xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr); |
| 1129 | xfs_trans_log_buf(args->trans, bp, |
| 1130 | XFS_DA_LOGRANGE(leaf, &leaf->hdr, |
| 1131 | xfs_attr3_leaf_hdr_size(leaf))); |
| 1132 | return tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | } |
| 1134 | |
| 1135 | /* |
| 1136 | * Add a name to a leaf attribute list structure. |
| 1137 | */ |
| 1138 | STATIC int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1139 | xfs_attr3_leaf_add_work( |
| 1140 | struct xfs_buf *bp, |
| 1141 | struct xfs_attr3_icleaf_hdr *ichdr, |
| 1142 | struct xfs_da_args *args, |
| 1143 | int mapindex) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1145 | struct xfs_attr_leafblock *leaf; |
| 1146 | struct xfs_attr_leaf_entry *entry; |
| 1147 | struct xfs_attr_leaf_name_local *name_loc; |
| 1148 | struct xfs_attr_leaf_name_remote *name_rmt; |
| 1149 | struct xfs_mount *mp; |
| 1150 | int tmp; |
| 1151 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1153 | trace_xfs_attr_leaf_add_work(args); |
| 1154 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1155 | leaf = bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1156 | ASSERT(mapindex >= 0 && mapindex < XFS_ATTR_LEAF_MAPSIZE); |
| 1157 | ASSERT(args->index >= 0 && args->index <= ichdr->count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | |
| 1159 | /* |
| 1160 | * Force open some space in the entry array and fill it in. |
| 1161 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1162 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
| 1163 | if (args->index < ichdr->count) { |
| 1164 | tmp = ichdr->count - args->index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1166 | memmove(entry + 1, entry, tmp); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1167 | xfs_trans_log_buf(args->trans, bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(*entry))); |
| 1169 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1170 | ichdr->count++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | |
| 1172 | /* |
| 1173 | * Allocate space for the new string (at the end of the run). |
| 1174 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | mp = args->trans->t_mountp; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1176 | ASSERT(ichdr->freemap[mapindex].base < XFS_LBSIZE(mp)); |
| 1177 | ASSERT((ichdr->freemap[mapindex].base & 0x3) == 0); |
| 1178 | ASSERT(ichdr->freemap[mapindex].size >= |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 1179 | xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
| 1180 | mp->m_sb.sb_blocksize, NULL)); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1181 | ASSERT(ichdr->freemap[mapindex].size < XFS_LBSIZE(mp)); |
| 1182 | ASSERT((ichdr->freemap[mapindex].size & 0x3) == 0); |
| 1183 | |
| 1184 | ichdr->freemap[mapindex].size -= |
| 1185 | xfs_attr_leaf_newentsize(args->namelen, args->valuelen, |
| 1186 | mp->m_sb.sb_blocksize, &tmp); |
| 1187 | |
| 1188 | entry->nameidx = cpu_to_be16(ichdr->freemap[mapindex].base + |
| 1189 | ichdr->freemap[mapindex].size); |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1190 | entry->hashval = cpu_to_be32(args->hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | entry->flags = tmp ? XFS_ATTR_LOCAL : 0; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 1192 | entry->flags |= XFS_ATTR_NSP_ARGS_TO_ONDISK(args->flags); |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 1193 | if (args->op_flags & XFS_DA_OP_RENAME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | entry->flags |= XFS_ATTR_INCOMPLETE; |
| 1195 | if ((args->blkno2 == args->blkno) && |
| 1196 | (args->index2 <= args->index)) { |
| 1197 | args->index2++; |
| 1198 | } |
| 1199 | } |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1200 | xfs_trans_log_buf(args->trans, bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1202 | ASSERT((args->index == 0) || |
| 1203 | (be32_to_cpu(entry->hashval) >= be32_to_cpu((entry-1)->hashval))); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1204 | ASSERT((args->index == ichdr->count - 1) || |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1205 | (be32_to_cpu(entry->hashval) <= be32_to_cpu((entry+1)->hashval))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | |
| 1207 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | * For "remote" attribute values, simply note that we need to |
| 1209 | * allocate space for the "remote" value. We can't actually |
| 1210 | * allocate the extents in this transaction, and we can't decide |
| 1211 | * which blocks they should be as we might allocate more blocks |
| 1212 | * as part of this transaction (a split operation for example). |
| 1213 | */ |
| 1214 | if (entry->flags & XFS_ATTR_LOCAL) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1215 | name_loc = xfs_attr3_leaf_name_local(leaf, args->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | name_loc->namelen = args->namelen; |
Nathan Scott | 053b575 | 2006-03-17 17:29:09 +1100 | [diff] [blame] | 1217 | name_loc->valuelen = cpu_to_be16(args->valuelen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | memcpy((char *)name_loc->nameval, args->name, args->namelen); |
| 1219 | memcpy((char *)&name_loc->nameval[args->namelen], args->value, |
Nathan Scott | 053b575 | 2006-03-17 17:29:09 +1100 | [diff] [blame] | 1220 | be16_to_cpu(name_loc->valuelen)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1222 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | name_rmt->namelen = args->namelen; |
| 1224 | memcpy((char *)name_rmt->name, args->name, args->namelen); |
| 1225 | entry->flags |= XFS_ATTR_INCOMPLETE; |
| 1226 | /* just in case */ |
| 1227 | name_rmt->valuelen = 0; |
| 1228 | name_rmt->valueblk = 0; |
| 1229 | args->rmtblkno = 1; |
Dave Chinner | ad1858d | 2013-05-21 18:02:08 +1000 | [diff] [blame] | 1230 | args->rmtblkcnt = xfs_attr3_rmt_blocks(mp, args->valuelen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | } |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1232 | xfs_trans_log_buf(args->trans, bp, |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1233 | XFS_DA_LOGRANGE(leaf, xfs_attr3_leaf_name(leaf, args->index), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | xfs_attr_leaf_entsize(leaf, args->index))); |
| 1235 | |
| 1236 | /* |
| 1237 | * Update the control info for this leaf node |
| 1238 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1239 | if (be16_to_cpu(entry->nameidx) < ichdr->firstused) |
| 1240 | ichdr->firstused = be16_to_cpu(entry->nameidx); |
| 1241 | |
| 1242 | ASSERT(ichdr->firstused >= ichdr->count * sizeof(xfs_attr_leaf_entry_t) |
| 1243 | + xfs_attr3_leaf_hdr_size(leaf)); |
| 1244 | tmp = (ichdr->count - 1) * sizeof(xfs_attr_leaf_entry_t) |
| 1245 | + xfs_attr3_leaf_hdr_size(leaf); |
| 1246 | |
| 1247 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { |
| 1248 | if (ichdr->freemap[i].base == tmp) { |
| 1249 | ichdr->freemap[i].base += sizeof(xfs_attr_leaf_entry_t); |
| 1250 | ichdr->freemap[i].size -= sizeof(xfs_attr_leaf_entry_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | } |
| 1252 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1253 | ichdr->usedbytes += xfs_attr_leaf_entsize(leaf, args->index); |
| 1254 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | } |
| 1256 | |
| 1257 | /* |
| 1258 | * Garbage collect a leaf attribute list block by copying it to a new buffer. |
| 1259 | */ |
| 1260 | STATIC void |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1261 | xfs_attr3_leaf_compact( |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1262 | struct xfs_da_args *args, |
Dave Chinner | d4c712b | 2013-05-21 18:02:06 +1000 | [diff] [blame] | 1263 | struct xfs_attr3_icleaf_hdr *ichdr_dst, |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1264 | struct xfs_buf *bp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | { |
Dave Chinner | d4c712b | 2013-05-21 18:02:06 +1000 | [diff] [blame] | 1266 | struct xfs_attr_leafblock *leaf_src; |
| 1267 | struct xfs_attr_leafblock *leaf_dst; |
| 1268 | struct xfs_attr3_icleaf_hdr ichdr_src; |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1269 | struct xfs_trans *trans = args->trans; |
| 1270 | struct xfs_mount *mp = trans->t_mountp; |
| 1271 | char *tmpbuffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1273 | trace_xfs_attr_leaf_compact(args); |
| 1274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | tmpbuffer = kmem_alloc(XFS_LBSIZE(mp), KM_SLEEP); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1276 | memcpy(tmpbuffer, bp->b_addr, XFS_LBSIZE(mp)); |
| 1277 | memset(bp->b_addr, 0, XFS_LBSIZE(mp)); |
Dave Chinner | d4c712b | 2013-05-21 18:02:06 +1000 | [diff] [blame] | 1278 | leaf_src = (xfs_attr_leafblock_t *)tmpbuffer; |
| 1279 | leaf_dst = bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | |
| 1281 | /* |
Dave Chinner | d4c712b | 2013-05-21 18:02:06 +1000 | [diff] [blame] | 1282 | * Copy the on-disk header back into the destination buffer to ensure |
| 1283 | * all the information in the header that is not part of the incore |
| 1284 | * header structure is preserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | */ |
Dave Chinner | d4c712b | 2013-05-21 18:02:06 +1000 | [diff] [blame] | 1286 | memcpy(bp->b_addr, tmpbuffer, xfs_attr3_leaf_hdr_size(leaf_src)); |
| 1287 | |
| 1288 | /* Initialise the incore headers */ |
| 1289 | ichdr_src = *ichdr_dst; /* struct copy */ |
| 1290 | ichdr_dst->firstused = XFS_LBSIZE(mp); |
| 1291 | ichdr_dst->usedbytes = 0; |
| 1292 | ichdr_dst->count = 0; |
| 1293 | ichdr_dst->holes = 0; |
| 1294 | ichdr_dst->freemap[0].base = xfs_attr3_leaf_hdr_size(leaf_src); |
| 1295 | ichdr_dst->freemap[0].size = ichdr_dst->firstused - |
| 1296 | ichdr_dst->freemap[0].base; |
| 1297 | |
Dave Chinner | d4c712b | 2013-05-21 18:02:06 +1000 | [diff] [blame] | 1298 | /* write the header back to initialise the underlying buffer */ |
| 1299 | xfs_attr3_leaf_hdr_to_disk(leaf_dst, ichdr_dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | |
| 1301 | /* |
| 1302 | * Copy all entry's in the same (sorted) order, |
| 1303 | * but allocate name/value pairs packed and in sequence. |
| 1304 | */ |
Dave Chinner | d4c712b | 2013-05-21 18:02:06 +1000 | [diff] [blame] | 1305 | xfs_attr3_leaf_moveents(leaf_src, &ichdr_src, 0, leaf_dst, ichdr_dst, 0, |
| 1306 | ichdr_src.count, mp); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1307 | /* |
| 1308 | * this logs the entire buffer, but the caller must write the header |
| 1309 | * back to the buffer when it is finished modifying it. |
| 1310 | */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1311 | xfs_trans_log_buf(trans, bp, 0, XFS_LBSIZE(mp) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 1313 | kmem_free(tmpbuffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | } |
| 1315 | |
| 1316 | /* |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1317 | * Compare two leaf blocks "order". |
| 1318 | * Return 0 unless leaf2 should go before leaf1. |
| 1319 | */ |
| 1320 | static int |
| 1321 | xfs_attr3_leaf_order( |
| 1322 | struct xfs_buf *leaf1_bp, |
| 1323 | struct xfs_attr3_icleaf_hdr *leaf1hdr, |
| 1324 | struct xfs_buf *leaf2_bp, |
| 1325 | struct xfs_attr3_icleaf_hdr *leaf2hdr) |
| 1326 | { |
| 1327 | struct xfs_attr_leaf_entry *entries1; |
| 1328 | struct xfs_attr_leaf_entry *entries2; |
| 1329 | |
| 1330 | entries1 = xfs_attr3_leaf_entryp(leaf1_bp->b_addr); |
| 1331 | entries2 = xfs_attr3_leaf_entryp(leaf2_bp->b_addr); |
| 1332 | if (leaf1hdr->count > 0 && leaf2hdr->count > 0 && |
| 1333 | ((be32_to_cpu(entries2[0].hashval) < |
| 1334 | be32_to_cpu(entries1[0].hashval)) || |
| 1335 | (be32_to_cpu(entries2[leaf2hdr->count - 1].hashval) < |
| 1336 | be32_to_cpu(entries1[leaf1hdr->count - 1].hashval)))) { |
| 1337 | return 1; |
| 1338 | } |
| 1339 | return 0; |
| 1340 | } |
| 1341 | |
| 1342 | int |
| 1343 | xfs_attr_leaf_order( |
| 1344 | struct xfs_buf *leaf1_bp, |
| 1345 | struct xfs_buf *leaf2_bp) |
| 1346 | { |
| 1347 | struct xfs_attr3_icleaf_hdr ichdr1; |
| 1348 | struct xfs_attr3_icleaf_hdr ichdr2; |
| 1349 | |
| 1350 | xfs_attr3_leaf_hdr_from_disk(&ichdr1, leaf1_bp->b_addr); |
| 1351 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, leaf2_bp->b_addr); |
| 1352 | return xfs_attr3_leaf_order(leaf1_bp, &ichdr1, leaf2_bp, &ichdr2); |
| 1353 | } |
| 1354 | |
| 1355 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | * Redistribute the attribute list entries between two leaf nodes, |
| 1357 | * taking into account the size of the new entry. |
| 1358 | * |
| 1359 | * NOTE: if new block is empty, then it will get the upper half of the |
| 1360 | * old block. At present, all (one) callers pass in an empty second block. |
| 1361 | * |
| 1362 | * This code adjusts the args->index/blkno and args->index2/blkno2 fields |
| 1363 | * to match what it is doing in splitting the attribute leaf block. Those |
| 1364 | * values are used in "atomic rename" operations on attributes. Note that |
| 1365 | * the "new" and "old" values can end up in different blocks. |
| 1366 | */ |
| 1367 | STATIC void |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1368 | xfs_attr3_leaf_rebalance( |
| 1369 | struct xfs_da_state *state, |
| 1370 | struct xfs_da_state_blk *blk1, |
| 1371 | struct xfs_da_state_blk *blk2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1373 | struct xfs_da_args *args; |
| 1374 | struct xfs_attr_leafblock *leaf1; |
| 1375 | struct xfs_attr_leafblock *leaf2; |
| 1376 | struct xfs_attr3_icleaf_hdr ichdr1; |
| 1377 | struct xfs_attr3_icleaf_hdr ichdr2; |
| 1378 | struct xfs_attr_leaf_entry *entries1; |
| 1379 | struct xfs_attr_leaf_entry *entries2; |
| 1380 | int count; |
| 1381 | int totallen; |
| 1382 | int max; |
| 1383 | int space; |
| 1384 | int swap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | |
| 1386 | /* |
| 1387 | * Set up environment. |
| 1388 | */ |
| 1389 | ASSERT(blk1->magic == XFS_ATTR_LEAF_MAGIC); |
| 1390 | ASSERT(blk2->magic == XFS_ATTR_LEAF_MAGIC); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1391 | leaf1 = blk1->bp->b_addr; |
| 1392 | leaf2 = blk2->bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1393 | xfs_attr3_leaf_hdr_from_disk(&ichdr1, leaf1); |
| 1394 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, leaf2); |
| 1395 | ASSERT(ichdr2.count == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | args = state->args; |
| 1397 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1398 | trace_xfs_attr_leaf_rebalance(args); |
| 1399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | /* |
| 1401 | * Check ordering of blocks, reverse if it makes things simpler. |
| 1402 | * |
| 1403 | * NOTE: Given that all (current) callers pass in an empty |
| 1404 | * second block, this code should never set "swap". |
| 1405 | */ |
| 1406 | swap = 0; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1407 | if (xfs_attr3_leaf_order(blk1->bp, &ichdr1, blk2->bp, &ichdr2)) { |
| 1408 | struct xfs_da_state_blk *tmp_blk; |
| 1409 | struct xfs_attr3_icleaf_hdr tmp_ichdr; |
| 1410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | tmp_blk = blk1; |
| 1412 | blk1 = blk2; |
| 1413 | blk2 = tmp_blk; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1414 | |
| 1415 | /* struct copies to swap them rather than reconverting */ |
| 1416 | tmp_ichdr = ichdr1; |
| 1417 | ichdr1 = ichdr2; |
| 1418 | ichdr2 = tmp_ichdr; |
| 1419 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1420 | leaf1 = blk1->bp->b_addr; |
| 1421 | leaf2 = blk2->bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | swap = 1; |
| 1423 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | |
| 1425 | /* |
| 1426 | * Examine entries until we reduce the absolute difference in |
| 1427 | * byte usage between the two blocks to a minimum. Then get |
| 1428 | * the direction to copy and the number of elements to move. |
| 1429 | * |
| 1430 | * "inleaf" is true if the new entry should be inserted into blk1. |
| 1431 | * If "swap" is also true, then reverse the sense of "inleaf". |
| 1432 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1433 | state->inleaf = xfs_attr3_leaf_figure_balance(state, blk1, &ichdr1, |
| 1434 | blk2, &ichdr2, |
| 1435 | &count, &totallen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | if (swap) |
| 1437 | state->inleaf = !state->inleaf; |
| 1438 | |
| 1439 | /* |
| 1440 | * Move any entries required from leaf to leaf: |
| 1441 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1442 | if (count < ichdr1.count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | /* |
| 1444 | * Figure the total bytes to be added to the destination leaf. |
| 1445 | */ |
| 1446 | /* number entries being moved */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1447 | count = ichdr1.count - count; |
| 1448 | space = ichdr1.usedbytes - totallen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | space += count * sizeof(xfs_attr_leaf_entry_t); |
| 1450 | |
| 1451 | /* |
| 1452 | * leaf2 is the destination, compact it if it looks tight. |
| 1453 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1454 | max = ichdr2.firstused - xfs_attr3_leaf_hdr_size(leaf1); |
| 1455 | max -= ichdr2.count * sizeof(xfs_attr_leaf_entry_t); |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1456 | if (space > max) |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1457 | xfs_attr3_leaf_compact(args, &ichdr2, blk2->bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | |
| 1459 | /* |
| 1460 | * Move high entries from leaf1 to low end of leaf2. |
| 1461 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1462 | xfs_attr3_leaf_moveents(leaf1, &ichdr1, ichdr1.count - count, |
| 1463 | leaf2, &ichdr2, 0, count, state->mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1465 | } else if (count > ichdr1.count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | /* |
| 1467 | * I assert that since all callers pass in an empty |
| 1468 | * second buffer, this code should never execute. |
| 1469 | */ |
Dave Chinner | 07428d7 | 2012-11-12 22:09:44 +1100 | [diff] [blame] | 1470 | ASSERT(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | |
| 1472 | /* |
| 1473 | * Figure the total bytes to be added to the destination leaf. |
| 1474 | */ |
| 1475 | /* number entries being moved */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1476 | count -= ichdr1.count; |
| 1477 | space = totallen - ichdr1.usedbytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | space += count * sizeof(xfs_attr_leaf_entry_t); |
| 1479 | |
| 1480 | /* |
| 1481 | * leaf1 is the destination, compact it if it looks tight. |
| 1482 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1483 | max = ichdr1.firstused - xfs_attr3_leaf_hdr_size(leaf1); |
| 1484 | max -= ichdr1.count * sizeof(xfs_attr_leaf_entry_t); |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1485 | if (space > max) |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1486 | xfs_attr3_leaf_compact(args, &ichdr1, blk1->bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | |
| 1488 | /* |
| 1489 | * Move low entries from leaf2 to high end of leaf1. |
| 1490 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1491 | xfs_attr3_leaf_moveents(leaf2, &ichdr2, 0, leaf1, &ichdr1, |
| 1492 | ichdr1.count, count, state->mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | } |
| 1494 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1495 | xfs_attr3_leaf_hdr_to_disk(leaf1, &ichdr1); |
| 1496 | xfs_attr3_leaf_hdr_to_disk(leaf2, &ichdr2); |
| 1497 | xfs_trans_log_buf(args->trans, blk1->bp, 0, state->blocksize-1); |
| 1498 | xfs_trans_log_buf(args->trans, blk2->bp, 0, state->blocksize-1); |
| 1499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1500 | /* |
| 1501 | * Copy out last hashval in each block for B-tree code. |
| 1502 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1503 | entries1 = xfs_attr3_leaf_entryp(leaf1); |
| 1504 | entries2 = xfs_attr3_leaf_entryp(leaf2); |
| 1505 | blk1->hashval = be32_to_cpu(entries1[ichdr1.count - 1].hashval); |
| 1506 | blk2->hashval = be32_to_cpu(entries2[ichdr2.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | |
| 1508 | /* |
| 1509 | * Adjust the expected index for insertion. |
| 1510 | * NOTE: this code depends on the (current) situation that the |
| 1511 | * second block was originally empty. |
| 1512 | * |
| 1513 | * If the insertion point moved to the 2nd block, we must adjust |
| 1514 | * the index. We must also track the entry just following the |
| 1515 | * new entry for use in an "atomic rename" operation, that entry |
| 1516 | * is always the "old" entry and the "new" entry is what we are |
| 1517 | * inserting. The index/blkno fields refer to the "old" entry, |
| 1518 | * while the index2/blkno2 fields refer to the "new" entry. |
| 1519 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1520 | if (blk1->index > ichdr1.count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | ASSERT(state->inleaf == 0); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1522 | blk2->index = blk1->index - ichdr1.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | args->index = args->index2 = blk2->index; |
| 1524 | args->blkno = args->blkno2 = blk2->blkno; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1525 | } else if (blk1->index == ichdr1.count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | if (state->inleaf) { |
| 1527 | args->index = blk1->index; |
| 1528 | args->blkno = blk1->blkno; |
| 1529 | args->index2 = 0; |
| 1530 | args->blkno2 = blk2->blkno; |
| 1531 | } else { |
Dave Chinner | 07428d7 | 2012-11-12 22:09:44 +1100 | [diff] [blame] | 1532 | /* |
| 1533 | * On a double leaf split, the original attr location |
| 1534 | * is already stored in blkno2/index2, so don't |
| 1535 | * overwrite it overwise we corrupt the tree. |
| 1536 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1537 | blk2->index = blk1->index - ichdr1.count; |
Dave Chinner | 07428d7 | 2012-11-12 22:09:44 +1100 | [diff] [blame] | 1538 | args->index = blk2->index; |
| 1539 | args->blkno = blk2->blkno; |
| 1540 | if (!state->extravalid) { |
| 1541 | /* |
| 1542 | * set the new attr location to match the old |
| 1543 | * one and let the higher level split code |
| 1544 | * decide where in the leaf to place it. |
| 1545 | */ |
| 1546 | args->index2 = blk2->index; |
| 1547 | args->blkno2 = blk2->blkno; |
| 1548 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | } |
| 1550 | } else { |
| 1551 | ASSERT(state->inleaf == 1); |
| 1552 | args->index = args->index2 = blk1->index; |
| 1553 | args->blkno = args->blkno2 = blk1->blkno; |
| 1554 | } |
| 1555 | } |
| 1556 | |
| 1557 | /* |
| 1558 | * Examine entries until we reduce the absolute difference in |
| 1559 | * byte usage between the two blocks to a minimum. |
| 1560 | * GROT: Is this really necessary? With other than a 512 byte blocksize, |
| 1561 | * GROT: there will always be enough room in either block for a new entry. |
| 1562 | * GROT: Do a double-split for this case? |
| 1563 | */ |
| 1564 | STATIC int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1565 | xfs_attr3_leaf_figure_balance( |
| 1566 | struct xfs_da_state *state, |
| 1567 | struct xfs_da_state_blk *blk1, |
| 1568 | struct xfs_attr3_icleaf_hdr *ichdr1, |
| 1569 | struct xfs_da_state_blk *blk2, |
| 1570 | struct xfs_attr3_icleaf_hdr *ichdr2, |
| 1571 | int *countarg, |
| 1572 | int *usedbytesarg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1574 | struct xfs_attr_leafblock *leaf1 = blk1->bp->b_addr; |
| 1575 | struct xfs_attr_leafblock *leaf2 = blk2->bp->b_addr; |
| 1576 | struct xfs_attr_leaf_entry *entry; |
| 1577 | int count; |
| 1578 | int max; |
| 1579 | int index; |
| 1580 | int totallen = 0; |
| 1581 | int half; |
| 1582 | int lastdelta; |
| 1583 | int foundit = 0; |
| 1584 | int tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | |
| 1586 | /* |
| 1587 | * Examine entries until we reduce the absolute difference in |
| 1588 | * byte usage between the two blocks to a minimum. |
| 1589 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1590 | max = ichdr1->count + ichdr2->count; |
| 1591 | half = (max + 1) * sizeof(*entry); |
| 1592 | half += ichdr1->usedbytes + ichdr2->usedbytes + |
| 1593 | xfs_attr_leaf_newentsize(state->args->namelen, |
| 1594 | state->args->valuelen, |
| 1595 | state->blocksize, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | half /= 2; |
| 1597 | lastdelta = state->blocksize; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1598 | entry = xfs_attr3_leaf_entryp(leaf1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | for (count = index = 0; count < max; entry++, index++, count++) { |
| 1600 | |
| 1601 | #define XFS_ATTR_ABS(A) (((A) < 0) ? -(A) : (A)) |
| 1602 | /* |
| 1603 | * The new entry is in the first block, account for it. |
| 1604 | */ |
| 1605 | if (count == blk1->index) { |
| 1606 | tmp = totallen + sizeof(*entry) + |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 1607 | xfs_attr_leaf_newentsize( |
| 1608 | state->args->namelen, |
| 1609 | state->args->valuelen, |
| 1610 | state->blocksize, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) |
| 1612 | break; |
| 1613 | lastdelta = XFS_ATTR_ABS(half - tmp); |
| 1614 | totallen = tmp; |
| 1615 | foundit = 1; |
| 1616 | } |
| 1617 | |
| 1618 | /* |
| 1619 | * Wrap around into the second block if necessary. |
| 1620 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1621 | if (count == ichdr1->count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | leaf1 = leaf2; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1623 | entry = xfs_attr3_leaf_entryp(leaf1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | index = 0; |
| 1625 | } |
| 1626 | |
| 1627 | /* |
| 1628 | * Figure out if next leaf entry would be too much. |
| 1629 | */ |
| 1630 | tmp = totallen + sizeof(*entry) + xfs_attr_leaf_entsize(leaf1, |
| 1631 | index); |
| 1632 | if (XFS_ATTR_ABS(half - tmp) > lastdelta) |
| 1633 | break; |
| 1634 | lastdelta = XFS_ATTR_ABS(half - tmp); |
| 1635 | totallen = tmp; |
| 1636 | #undef XFS_ATTR_ABS |
| 1637 | } |
| 1638 | |
| 1639 | /* |
| 1640 | * Calculate the number of usedbytes that will end up in lower block. |
| 1641 | * If new entry not in lower block, fix up the count. |
| 1642 | */ |
| 1643 | totallen -= count * sizeof(*entry); |
| 1644 | if (foundit) { |
| 1645 | totallen -= sizeof(*entry) + |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 1646 | xfs_attr_leaf_newentsize( |
| 1647 | state->args->namelen, |
| 1648 | state->args->valuelen, |
| 1649 | state->blocksize, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | } |
| 1651 | |
| 1652 | *countarg = count; |
| 1653 | *usedbytesarg = totallen; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1654 | return foundit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | } |
| 1656 | |
| 1657 | /*======================================================================== |
| 1658 | * Routines used for shrinking the Btree. |
| 1659 | *========================================================================*/ |
| 1660 | |
| 1661 | /* |
| 1662 | * Check a leaf block and its neighbors to see if the block should be |
| 1663 | * collapsed into one or the other neighbor. Always keep the block |
| 1664 | * with the smaller block number. |
| 1665 | * If the current block is over 50% full, don't try to join it, return 0. |
| 1666 | * If the block is empty, fill in the state structure and return 2. |
| 1667 | * If it can be collapsed, fill in the state structure and return 1. |
| 1668 | * If nothing can be done, return 0. |
| 1669 | * |
| 1670 | * GROT: allow for INCOMPLETE entries in calculation. |
| 1671 | */ |
| 1672 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1673 | xfs_attr3_leaf_toosmall( |
| 1674 | struct xfs_da_state *state, |
| 1675 | int *action) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1677 | struct xfs_attr_leafblock *leaf; |
| 1678 | struct xfs_da_state_blk *blk; |
| 1679 | struct xfs_attr3_icleaf_hdr ichdr; |
| 1680 | struct xfs_buf *bp; |
| 1681 | xfs_dablk_t blkno; |
| 1682 | int bytes; |
| 1683 | int forward; |
| 1684 | int error; |
| 1685 | int retval; |
| 1686 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1688 | trace_xfs_attr_leaf_toosmall(state->args); |
| 1689 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | /* |
| 1691 | * Check for the degenerate case of the block being over 50% full. |
| 1692 | * If so, it's not worth even looking to see if we might be able |
| 1693 | * to coalesce with a sibling. |
| 1694 | */ |
| 1695 | blk = &state->path.blk[ state->path.active-1 ]; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1696 | leaf = blk->bp->b_addr; |
| 1697 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
| 1698 | bytes = xfs_attr3_leaf_hdr_size(leaf) + |
| 1699 | ichdr.count * sizeof(xfs_attr_leaf_entry_t) + |
| 1700 | ichdr.usedbytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | if (bytes > (state->blocksize >> 1)) { |
| 1702 | *action = 0; /* blk over 50%, don't try to join */ |
| 1703 | return(0); |
| 1704 | } |
| 1705 | |
| 1706 | /* |
| 1707 | * Check for the degenerate case of the block being empty. |
| 1708 | * If the block is empty, we'll simply delete it, no need to |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1709 | * coalesce it with a sibling block. We choose (arbitrarily) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | * to merge with the forward block unless it is NULL. |
| 1711 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1712 | if (ichdr.count == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | /* |
| 1714 | * Make altpath point to the block we want to keep and |
| 1715 | * path point to the block we want to drop (this one). |
| 1716 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1717 | forward = (ichdr.forw != 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | memcpy(&state->altpath, &state->path, sizeof(state->path)); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1719 | error = xfs_da3_path_shift(state, &state->altpath, forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | 0, &retval); |
| 1721 | if (error) |
| 1722 | return(error); |
| 1723 | if (retval) { |
| 1724 | *action = 0; |
| 1725 | } else { |
| 1726 | *action = 2; |
| 1727 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1728 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | } |
| 1730 | |
| 1731 | /* |
| 1732 | * Examine each sibling block to see if we can coalesce with |
| 1733 | * at least 25% free space to spare. We need to figure out |
| 1734 | * whether to merge with the forward or the backward block. |
| 1735 | * We prefer coalescing with the lower numbered sibling so as |
| 1736 | * to shrink an attribute list over time. |
| 1737 | */ |
| 1738 | /* start with smaller blk num */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1739 | forward = ichdr.forw < ichdr.back; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | for (i = 0; i < 2; forward = !forward, i++) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1741 | struct xfs_attr3_icleaf_hdr ichdr2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | if (forward) |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1743 | blkno = ichdr.forw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | else |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1745 | blkno = ichdr.back; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | if (blkno == 0) |
| 1747 | continue; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1748 | error = xfs_attr3_leaf_read(state->args->trans, state->args->dp, |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 1749 | blkno, -1, &bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | if (error) |
| 1751 | return(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1753 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, bp->b_addr); |
| 1754 | |
| 1755 | bytes = state->blocksize - (state->blocksize >> 2) - |
| 1756 | ichdr.usedbytes - ichdr2.usedbytes - |
| 1757 | ((ichdr.count + ichdr2.count) * |
| 1758 | sizeof(xfs_attr_leaf_entry_t)) - |
| 1759 | xfs_attr3_leaf_hdr_size(leaf); |
| 1760 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1761 | xfs_trans_brelse(state->args->trans, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | if (bytes >= 0) |
| 1763 | break; /* fits with at least 25% to spare */ |
| 1764 | } |
| 1765 | if (i >= 2) { |
| 1766 | *action = 0; |
| 1767 | return(0); |
| 1768 | } |
| 1769 | |
| 1770 | /* |
| 1771 | * Make altpath point to the block we want to keep (the lower |
| 1772 | * numbered block) and path point to the block we want to drop. |
| 1773 | */ |
| 1774 | memcpy(&state->altpath, &state->path, sizeof(state->path)); |
| 1775 | if (blkno < blk->blkno) { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1776 | error = xfs_da3_path_shift(state, &state->altpath, forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | 0, &retval); |
| 1778 | } else { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1779 | error = xfs_da3_path_shift(state, &state->path, forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | 0, &retval); |
| 1781 | } |
| 1782 | if (error) |
| 1783 | return(error); |
| 1784 | if (retval) { |
| 1785 | *action = 0; |
| 1786 | } else { |
| 1787 | *action = 1; |
| 1788 | } |
| 1789 | return(0); |
| 1790 | } |
| 1791 | |
| 1792 | /* |
| 1793 | * Remove a name from the leaf attribute list structure. |
| 1794 | * |
| 1795 | * Return 1 if leaf is less than 37% full, 0 if >= 37% full. |
| 1796 | * If two leaves are 37% full, when combined they will leave 25% free. |
| 1797 | */ |
| 1798 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1799 | xfs_attr3_leaf_remove( |
| 1800 | struct xfs_buf *bp, |
| 1801 | struct xfs_da_args *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1803 | struct xfs_attr_leafblock *leaf; |
| 1804 | struct xfs_attr3_icleaf_hdr ichdr; |
| 1805 | struct xfs_attr_leaf_entry *entry; |
| 1806 | struct xfs_mount *mp = args->trans->t_mountp; |
| 1807 | int before; |
| 1808 | int after; |
| 1809 | int smallest; |
| 1810 | int entsize; |
| 1811 | int tablesize; |
| 1812 | int tmp; |
| 1813 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1815 | trace_xfs_attr_leaf_remove(args); |
| 1816 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1817 | leaf = bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1818 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
| 1819 | |
| 1820 | ASSERT(ichdr.count > 0 && ichdr.count < XFS_LBSIZE(mp) / 8); |
| 1821 | ASSERT(args->index >= 0 && args->index < ichdr.count); |
| 1822 | ASSERT(ichdr.firstused >= ichdr.count * sizeof(*entry) + |
| 1823 | xfs_attr3_leaf_hdr_size(leaf)); |
| 1824 | |
| 1825 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
| 1826 | |
| 1827 | ASSERT(be16_to_cpu(entry->nameidx) >= ichdr.firstused); |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1828 | ASSERT(be16_to_cpu(entry->nameidx) < XFS_LBSIZE(mp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | |
| 1830 | /* |
| 1831 | * Scan through free region table: |
| 1832 | * check for adjacency of free'd entry with an existing one, |
| 1833 | * find smallest free region in case we need to replace it, |
| 1834 | * adjust any map that borders the entry table, |
| 1835 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1836 | tablesize = ichdr.count * sizeof(xfs_attr_leaf_entry_t) |
| 1837 | + xfs_attr3_leaf_hdr_size(leaf); |
| 1838 | tmp = ichdr.freemap[0].size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | before = after = -1; |
| 1840 | smallest = XFS_ATTR_LEAF_MAPSIZE - 1; |
| 1841 | entsize = xfs_attr_leaf_entsize(leaf, args->index); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1842 | for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) { |
| 1843 | ASSERT(ichdr.freemap[i].base < XFS_LBSIZE(mp)); |
| 1844 | ASSERT(ichdr.freemap[i].size < XFS_LBSIZE(mp)); |
| 1845 | if (ichdr.freemap[i].base == tablesize) { |
| 1846 | ichdr.freemap[i].base -= sizeof(xfs_attr_leaf_entry_t); |
| 1847 | ichdr.freemap[i].size += sizeof(xfs_attr_leaf_entry_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | } |
| 1849 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1850 | if (ichdr.freemap[i].base + ichdr.freemap[i].size == |
| 1851 | be16_to_cpu(entry->nameidx)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | before = i; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1853 | } else if (ichdr.freemap[i].base == |
| 1854 | (be16_to_cpu(entry->nameidx) + entsize)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | after = i; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1856 | } else if (ichdr.freemap[i].size < tmp) { |
| 1857 | tmp = ichdr.freemap[i].size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | smallest = i; |
| 1859 | } |
| 1860 | } |
| 1861 | |
| 1862 | /* |
| 1863 | * Coalesce adjacent freemap regions, |
| 1864 | * or replace the smallest region. |
| 1865 | */ |
| 1866 | if ((before >= 0) || (after >= 0)) { |
| 1867 | if ((before >= 0) && (after >= 0)) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1868 | ichdr.freemap[before].size += entsize; |
| 1869 | ichdr.freemap[before].size += ichdr.freemap[after].size; |
| 1870 | ichdr.freemap[after].base = 0; |
| 1871 | ichdr.freemap[after].size = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | } else if (before >= 0) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1873 | ichdr.freemap[before].size += entsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1875 | ichdr.freemap[after].base = be16_to_cpu(entry->nameidx); |
| 1876 | ichdr.freemap[after].size += entsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | } |
| 1878 | } else { |
| 1879 | /* |
| 1880 | * Replace smallest region (if it is smaller than free'd entry) |
| 1881 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1882 | if (ichdr.freemap[smallest].size < entsize) { |
| 1883 | ichdr.freemap[smallest].base = be16_to_cpu(entry->nameidx); |
| 1884 | ichdr.freemap[smallest].size = entsize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | } |
| 1886 | } |
| 1887 | |
| 1888 | /* |
| 1889 | * Did we remove the first entry? |
| 1890 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1891 | if (be16_to_cpu(entry->nameidx) == ichdr.firstused) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | smallest = 1; |
| 1893 | else |
| 1894 | smallest = 0; |
| 1895 | |
| 1896 | /* |
| 1897 | * Compress the remaining entries and zero out the removed stuff. |
| 1898 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1899 | memset(xfs_attr3_leaf_name(leaf, args->index), 0, entsize); |
| 1900 | ichdr.usedbytes -= entsize; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1901 | xfs_trans_log_buf(args->trans, bp, |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1902 | XFS_DA_LOGRANGE(leaf, xfs_attr3_leaf_name(leaf, args->index), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | entsize)); |
| 1904 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1905 | tmp = (ichdr.count - args->index) * sizeof(xfs_attr_leaf_entry_t); |
| 1906 | memmove(entry, entry + 1, tmp); |
| 1907 | ichdr.count--; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1908 | xfs_trans_log_buf(args->trans, bp, |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1909 | XFS_DA_LOGRANGE(leaf, entry, tmp + sizeof(xfs_attr_leaf_entry_t))); |
| 1910 | |
| 1911 | entry = &xfs_attr3_leaf_entryp(leaf)[ichdr.count]; |
| 1912 | memset(entry, 0, sizeof(xfs_attr_leaf_entry_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | |
| 1914 | /* |
| 1915 | * If we removed the first entry, re-find the first used byte |
| 1916 | * in the name area. Note that if the entry was the "firstused", |
| 1917 | * then we don't have a "hole" in our block resulting from |
| 1918 | * removing the name. |
| 1919 | */ |
| 1920 | if (smallest) { |
| 1921 | tmp = XFS_LBSIZE(mp); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1922 | entry = xfs_attr3_leaf_entryp(leaf); |
| 1923 | for (i = ichdr.count - 1; i >= 0; entry++, i--) { |
| 1924 | ASSERT(be16_to_cpu(entry->nameidx) >= ichdr.firstused); |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 1925 | ASSERT(be16_to_cpu(entry->nameidx) < XFS_LBSIZE(mp)); |
| 1926 | |
| 1927 | if (be16_to_cpu(entry->nameidx) < tmp) |
| 1928 | tmp = be16_to_cpu(entry->nameidx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1930 | ichdr.firstused = tmp; |
| 1931 | if (!ichdr.firstused) |
| 1932 | ichdr.firstused = tmp - XFS_ATTR_LEAF_NAME_ALIGN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1934 | ichdr.holes = 1; /* mark as needing compaction */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1936 | xfs_attr3_leaf_hdr_to_disk(leaf, &ichdr); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1937 | xfs_trans_log_buf(args->trans, bp, |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1938 | XFS_DA_LOGRANGE(leaf, &leaf->hdr, |
| 1939 | xfs_attr3_leaf_hdr_size(leaf))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | |
| 1941 | /* |
| 1942 | * Check if leaf is less than 50% full, caller may want to |
| 1943 | * "join" the leaf with a sibling if so. |
| 1944 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1945 | tmp = ichdr.usedbytes + xfs_attr3_leaf_hdr_size(leaf) + |
| 1946 | ichdr.count * sizeof(xfs_attr_leaf_entry_t); |
| 1947 | |
| 1948 | return tmp < mp->m_attr_magicpct; /* leaf is < 37% full */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | } |
| 1950 | |
| 1951 | /* |
| 1952 | * Move all the attribute list entries from drop_leaf into save_leaf. |
| 1953 | */ |
| 1954 | void |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1955 | xfs_attr3_leaf_unbalance( |
| 1956 | struct xfs_da_state *state, |
| 1957 | struct xfs_da_state_blk *drop_blk, |
| 1958 | struct xfs_da_state_blk *save_blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1960 | struct xfs_attr_leafblock *drop_leaf = drop_blk->bp->b_addr; |
| 1961 | struct xfs_attr_leafblock *save_leaf = save_blk->bp->b_addr; |
| 1962 | struct xfs_attr3_icleaf_hdr drophdr; |
| 1963 | struct xfs_attr3_icleaf_hdr savehdr; |
| 1964 | struct xfs_attr_leaf_entry *entry; |
| 1965 | struct xfs_mount *mp = state->mp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1967 | trace_xfs_attr_leaf_unbalance(state->args); |
| 1968 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1969 | drop_leaf = drop_blk->bp->b_addr; |
| 1970 | save_leaf = save_blk->bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1971 | xfs_attr3_leaf_hdr_from_disk(&drophdr, drop_leaf); |
| 1972 | xfs_attr3_leaf_hdr_from_disk(&savehdr, save_leaf); |
| 1973 | entry = xfs_attr3_leaf_entryp(drop_leaf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1974 | |
| 1975 | /* |
| 1976 | * Save last hashval from dying block for later Btree fixup. |
| 1977 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1978 | drop_blk->hashval = be32_to_cpu(entry[drophdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1979 | |
| 1980 | /* |
| 1981 | * Check if we need a temp buffer, or can we do it in place. |
| 1982 | * Note that we don't check "leaf" for holes because we will |
| 1983 | * always be dropping it, toosmall() decided that for us already. |
| 1984 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1985 | if (savehdr.holes == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | /* |
| 1987 | * dest leaf has no holes, so we add there. May need |
| 1988 | * to make some room in the entry array. |
| 1989 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1990 | if (xfs_attr3_leaf_order(save_blk->bp, &savehdr, |
| 1991 | drop_blk->bp, &drophdr)) { |
| 1992 | xfs_attr3_leaf_moveents(drop_leaf, &drophdr, 0, |
| 1993 | save_leaf, &savehdr, 0, |
| 1994 | drophdr.count, mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1996 | xfs_attr3_leaf_moveents(drop_leaf, &drophdr, 0, |
| 1997 | save_leaf, &savehdr, |
| 1998 | savehdr.count, drophdr.count, mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | } |
| 2000 | } else { |
| 2001 | /* |
| 2002 | * Destination has holes, so we make a temporary copy |
| 2003 | * of the leaf and add them both to that. |
| 2004 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2005 | struct xfs_attr_leafblock *tmp_leaf; |
| 2006 | struct xfs_attr3_icleaf_hdr tmphdr; |
| 2007 | |
Dave Chinner | 8517de2 | 2013-05-21 18:02:05 +1000 | [diff] [blame] | 2008 | tmp_leaf = kmem_zalloc(state->blocksize, KM_SLEEP); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2009 | |
Dave Chinner | 8517de2 | 2013-05-21 18:02:05 +1000 | [diff] [blame] | 2010 | /* |
| 2011 | * Copy the header into the temp leaf so that all the stuff |
| 2012 | * not in the incore header is present and gets copied back in |
| 2013 | * once we've moved all the entries. |
| 2014 | */ |
| 2015 | memcpy(tmp_leaf, save_leaf, xfs_attr3_leaf_hdr_size(save_leaf)); |
| 2016 | |
| 2017 | memset(&tmphdr, 0, sizeof(tmphdr)); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2018 | tmphdr.magic = savehdr.magic; |
| 2019 | tmphdr.forw = savehdr.forw; |
| 2020 | tmphdr.back = savehdr.back; |
| 2021 | tmphdr.firstused = state->blocksize; |
Dave Chinner | 8517de2 | 2013-05-21 18:02:05 +1000 | [diff] [blame] | 2022 | |
| 2023 | /* write the header to the temp buffer to initialise it */ |
| 2024 | xfs_attr3_leaf_hdr_to_disk(tmp_leaf, &tmphdr); |
| 2025 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2026 | if (xfs_attr3_leaf_order(save_blk->bp, &savehdr, |
| 2027 | drop_blk->bp, &drophdr)) { |
| 2028 | xfs_attr3_leaf_moveents(drop_leaf, &drophdr, 0, |
| 2029 | tmp_leaf, &tmphdr, 0, |
| 2030 | drophdr.count, mp); |
| 2031 | xfs_attr3_leaf_moveents(save_leaf, &savehdr, 0, |
| 2032 | tmp_leaf, &tmphdr, tmphdr.count, |
| 2033 | savehdr.count, mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2035 | xfs_attr3_leaf_moveents(save_leaf, &savehdr, 0, |
| 2036 | tmp_leaf, &tmphdr, 0, |
| 2037 | savehdr.count, mp); |
| 2038 | xfs_attr3_leaf_moveents(drop_leaf, &drophdr, 0, |
| 2039 | tmp_leaf, &tmphdr, tmphdr.count, |
| 2040 | drophdr.count, mp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2042 | memcpy(save_leaf, tmp_leaf, state->blocksize); |
| 2043 | savehdr = tmphdr; /* struct copy */ |
| 2044 | kmem_free(tmp_leaf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | } |
| 2046 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2047 | xfs_attr3_leaf_hdr_to_disk(save_leaf, &savehdr); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2048 | xfs_trans_log_buf(state->args->trans, save_blk->bp, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | state->blocksize - 1); |
| 2050 | |
| 2051 | /* |
| 2052 | * Copy out last hashval in each block for B-tree code. |
| 2053 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2054 | entry = xfs_attr3_leaf_entryp(save_leaf); |
| 2055 | save_blk->hashval = be32_to_cpu(entry[savehdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | } |
| 2057 | |
| 2058 | /*======================================================================== |
| 2059 | * Routines used for finding things in the Btree. |
| 2060 | *========================================================================*/ |
| 2061 | |
| 2062 | /* |
| 2063 | * Look up a name in a leaf attribute list structure. |
| 2064 | * This is the internal routine, it uses the caller's buffer. |
| 2065 | * |
| 2066 | * Note that duplicate keys are allowed, but only check within the |
| 2067 | * current leaf node. The Btree code must check in adjacent leaf nodes. |
| 2068 | * |
| 2069 | * Return in args->index the index into the entry[] array of either |
| 2070 | * the found entry, or where the entry should have been (insert before |
| 2071 | * that entry). |
| 2072 | * |
| 2073 | * Don't change the args->value unless we find the attribute. |
| 2074 | */ |
| 2075 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2076 | xfs_attr3_leaf_lookup_int( |
| 2077 | struct xfs_buf *bp, |
| 2078 | struct xfs_da_args *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2080 | struct xfs_attr_leafblock *leaf; |
| 2081 | struct xfs_attr3_icleaf_hdr ichdr; |
| 2082 | struct xfs_attr_leaf_entry *entry; |
| 2083 | struct xfs_attr_leaf_entry *entries; |
| 2084 | struct xfs_attr_leaf_name_local *name_loc; |
| 2085 | struct xfs_attr_leaf_name_remote *name_rmt; |
| 2086 | xfs_dahash_t hashval; |
| 2087 | int probe; |
| 2088 | int span; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 2090 | trace_xfs_attr_leaf_lookup(args); |
| 2091 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2092 | leaf = bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2093 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
| 2094 | entries = xfs_attr3_leaf_entryp(leaf); |
| 2095 | ASSERT(ichdr.count < XFS_LBSIZE(args->dp->i_mount) / 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | |
| 2097 | /* |
| 2098 | * Binary search. (note: small blocks will skip this loop) |
| 2099 | */ |
| 2100 | hashval = args->hashval; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2101 | probe = span = ichdr.count / 2; |
| 2102 | for (entry = &entries[probe]; span > 4; entry = &entries[probe]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | span /= 2; |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 2104 | if (be32_to_cpu(entry->hashval) < hashval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | probe += span; |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 2106 | else if (be32_to_cpu(entry->hashval) > hashval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | probe -= span; |
| 2108 | else |
| 2109 | break; |
| 2110 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2111 | ASSERT(probe >= 0 && (!ichdr.count || probe < ichdr.count)); |
| 2112 | ASSERT(span <= 4 || be32_to_cpu(entry->hashval) == hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | |
| 2114 | /* |
| 2115 | * Since we may have duplicate hashval's, find the first matching |
| 2116 | * hashval in the leaf. |
| 2117 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2118 | while (probe > 0 && be32_to_cpu(entry->hashval) >= hashval) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | entry--; |
| 2120 | probe--; |
| 2121 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2122 | while (probe < ichdr.count && |
| 2123 | be32_to_cpu(entry->hashval) < hashval) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | entry++; |
| 2125 | probe++; |
| 2126 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2127 | if (probe == ichdr.count || be32_to_cpu(entry->hashval) != hashval) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | args->index = probe; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2129 | return XFS_ERROR(ENOATTR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2130 | } |
| 2131 | |
| 2132 | /* |
| 2133 | * Duplicate keys may be present, so search all of them for a match. |
| 2134 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2135 | for (; probe < ichdr.count && (be32_to_cpu(entry->hashval) == hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | entry++, probe++) { |
| 2137 | /* |
| 2138 | * GROT: Add code to remove incomplete entries. |
| 2139 | */ |
| 2140 | /* |
| 2141 | * If we are looking for INCOMPLETE entries, show only those. |
| 2142 | * If we are looking for complete entries, show only those. |
| 2143 | */ |
| 2144 | if ((args->flags & XFS_ATTR_INCOMPLETE) != |
| 2145 | (entry->flags & XFS_ATTR_INCOMPLETE)) { |
| 2146 | continue; |
| 2147 | } |
| 2148 | if (entry->flags & XFS_ATTR_LOCAL) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2149 | name_loc = xfs_attr3_leaf_name_local(leaf, probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2150 | if (name_loc->namelen != args->namelen) |
| 2151 | continue; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2152 | if (memcmp(args->name, name_loc->nameval, |
| 2153 | args->namelen) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | continue; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 2155 | if (!xfs_attr_namesp_match(args->flags, entry->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | continue; |
| 2157 | args->index = probe; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2158 | return XFS_ERROR(EEXIST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2160 | name_rmt = xfs_attr3_leaf_name_remote(leaf, probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | if (name_rmt->namelen != args->namelen) |
| 2162 | continue; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2163 | if (memcmp(args->name, name_rmt->name, |
| 2164 | args->namelen) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | continue; |
Tim Shimmin | 726801b | 2006-09-28 11:01:37 +1000 | [diff] [blame] | 2166 | if (!xfs_attr_namesp_match(args->flags, entry->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | continue; |
| 2168 | args->index = probe; |
Dave Chinner | e461fcb | 2013-05-20 09:51:16 +1000 | [diff] [blame] | 2169 | args->valuelen = be32_to_cpu(name_rmt->valuelen); |
Nathan Scott | c0f054e | 2006-03-17 17:29:18 +1100 | [diff] [blame] | 2170 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); |
Dave Chinner | ad1858d | 2013-05-21 18:02:08 +1000 | [diff] [blame] | 2171 | args->rmtblkcnt = xfs_attr3_rmt_blocks( |
| 2172 | args->dp->i_mount, |
| 2173 | args->valuelen); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2174 | return XFS_ERROR(EEXIST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | } |
| 2176 | } |
| 2177 | args->index = probe; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2178 | return XFS_ERROR(ENOATTR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | } |
| 2180 | |
| 2181 | /* |
| 2182 | * Get the value associated with an attribute name from a leaf attribute |
| 2183 | * list structure. |
| 2184 | */ |
| 2185 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2186 | xfs_attr3_leaf_getvalue( |
| 2187 | struct xfs_buf *bp, |
| 2188 | struct xfs_da_args *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2189 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2190 | struct xfs_attr_leafblock *leaf; |
| 2191 | struct xfs_attr3_icleaf_hdr ichdr; |
| 2192 | struct xfs_attr_leaf_entry *entry; |
| 2193 | struct xfs_attr_leaf_name_local *name_loc; |
| 2194 | struct xfs_attr_leaf_name_remote *name_rmt; |
| 2195 | int valuelen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2197 | leaf = bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2198 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
| 2199 | ASSERT(ichdr.count < XFS_LBSIZE(args->dp->i_mount) / 8); |
| 2200 | ASSERT(args->index < ichdr.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2202 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | if (entry->flags & XFS_ATTR_LOCAL) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2204 | name_loc = xfs_attr3_leaf_name_local(leaf, args->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | ASSERT(name_loc->namelen == args->namelen); |
| 2206 | ASSERT(memcmp(args->name, name_loc->nameval, args->namelen) == 0); |
Nathan Scott | 053b575 | 2006-03-17 17:29:09 +1100 | [diff] [blame] | 2207 | valuelen = be16_to_cpu(name_loc->valuelen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | if (args->flags & ATTR_KERNOVAL) { |
| 2209 | args->valuelen = valuelen; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2210 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | } |
| 2212 | if (args->valuelen < valuelen) { |
| 2213 | args->valuelen = valuelen; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2214 | return XFS_ERROR(ERANGE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | } |
| 2216 | args->valuelen = valuelen; |
| 2217 | memcpy(args->value, &name_loc->nameval[args->namelen], valuelen); |
| 2218 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2219 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | ASSERT(name_rmt->namelen == args->namelen); |
| 2221 | ASSERT(memcmp(args->name, name_rmt->name, args->namelen) == 0); |
Nathan Scott | c0f054e | 2006-03-17 17:29:18 +1100 | [diff] [blame] | 2222 | valuelen = be32_to_cpu(name_rmt->valuelen); |
| 2223 | args->rmtblkno = be32_to_cpu(name_rmt->valueblk); |
Dave Chinner | ad1858d | 2013-05-21 18:02:08 +1000 | [diff] [blame] | 2224 | args->rmtblkcnt = xfs_attr3_rmt_blocks(args->dp->i_mount, |
| 2225 | valuelen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | if (args->flags & ATTR_KERNOVAL) { |
| 2227 | args->valuelen = valuelen; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2228 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | } |
| 2230 | if (args->valuelen < valuelen) { |
| 2231 | args->valuelen = valuelen; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2232 | return XFS_ERROR(ERANGE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | } |
| 2234 | args->valuelen = valuelen; |
| 2235 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2236 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | } |
| 2238 | |
| 2239 | /*======================================================================== |
| 2240 | * Utility routines. |
| 2241 | *========================================================================*/ |
| 2242 | |
| 2243 | /* |
| 2244 | * Move the indicated entries from one leaf to another. |
| 2245 | * NOTE: this routine modifies both source and destination leaves. |
| 2246 | */ |
| 2247 | /*ARGSUSED*/ |
| 2248 | STATIC void |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2249 | xfs_attr3_leaf_moveents( |
| 2250 | struct xfs_attr_leafblock *leaf_s, |
| 2251 | struct xfs_attr3_icleaf_hdr *ichdr_s, |
| 2252 | int start_s, |
| 2253 | struct xfs_attr_leafblock *leaf_d, |
| 2254 | struct xfs_attr3_icleaf_hdr *ichdr_d, |
| 2255 | int start_d, |
| 2256 | int count, |
| 2257 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2259 | struct xfs_attr_leaf_entry *entry_s; |
| 2260 | struct xfs_attr_leaf_entry *entry_d; |
| 2261 | int desti; |
| 2262 | int tmp; |
| 2263 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | |
| 2265 | /* |
| 2266 | * Check for nothing to do. |
| 2267 | */ |
| 2268 | if (count == 0) |
| 2269 | return; |
| 2270 | |
| 2271 | /* |
| 2272 | * Set up environment. |
| 2273 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2274 | ASSERT(ichdr_s->magic == XFS_ATTR_LEAF_MAGIC || |
| 2275 | ichdr_s->magic == XFS_ATTR3_LEAF_MAGIC); |
| 2276 | ASSERT(ichdr_s->magic == ichdr_d->magic); |
| 2277 | ASSERT(ichdr_s->count > 0 && ichdr_s->count < XFS_LBSIZE(mp) / 8); |
| 2278 | ASSERT(ichdr_s->firstused >= (ichdr_s->count * sizeof(*entry_s)) |
| 2279 | + xfs_attr3_leaf_hdr_size(leaf_s)); |
| 2280 | ASSERT(ichdr_d->count < XFS_LBSIZE(mp) / 8); |
| 2281 | ASSERT(ichdr_d->firstused >= (ichdr_d->count * sizeof(*entry_d)) |
| 2282 | + xfs_attr3_leaf_hdr_size(leaf_d)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2284 | ASSERT(start_s < ichdr_s->count); |
| 2285 | ASSERT(start_d <= ichdr_d->count); |
| 2286 | ASSERT(count <= ichdr_s->count); |
| 2287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2288 | |
| 2289 | /* |
| 2290 | * Move the entries in the destination leaf up to make a hole? |
| 2291 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2292 | if (start_d < ichdr_d->count) { |
| 2293 | tmp = ichdr_d->count - start_d; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | tmp *= sizeof(xfs_attr_leaf_entry_t); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2295 | entry_s = &xfs_attr3_leaf_entryp(leaf_d)[start_d]; |
| 2296 | entry_d = &xfs_attr3_leaf_entryp(leaf_d)[start_d + count]; |
| 2297 | memmove(entry_d, entry_s, tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | } |
| 2299 | |
| 2300 | /* |
| 2301 | * Copy all entry's in the same (sorted) order, |
| 2302 | * but allocate attribute info packed and in sequence. |
| 2303 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2304 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[start_s]; |
| 2305 | entry_d = &xfs_attr3_leaf_entryp(leaf_d)[start_d]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2306 | desti = start_d; |
| 2307 | for (i = 0; i < count; entry_s++, entry_d++, desti++, i++) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2308 | ASSERT(be16_to_cpu(entry_s->nameidx) >= ichdr_s->firstused); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | tmp = xfs_attr_leaf_entsize(leaf_s, start_s + i); |
| 2310 | #ifdef GROT |
| 2311 | /* |
| 2312 | * Code to drop INCOMPLETE entries. Difficult to use as we |
| 2313 | * may also need to change the insertion index. Code turned |
| 2314 | * off for 6.2, should be revisited later. |
| 2315 | */ |
| 2316 | if (entry_s->flags & XFS_ATTR_INCOMPLETE) { /* skip partials? */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2317 | memset(xfs_attr3_leaf_name(leaf_s, start_s + i), 0, tmp); |
| 2318 | ichdr_s->usedbytes -= tmp; |
| 2319 | ichdr_s->count -= 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | entry_d--; /* to compensate for ++ in loop hdr */ |
| 2321 | desti--; |
| 2322 | if ((start_s + i) < offset) |
| 2323 | result++; /* insertion index adjustment */ |
| 2324 | } else { |
| 2325 | #endif /* GROT */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2326 | ichdr_d->firstused -= tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | /* both on-disk, don't endian flip twice */ |
| 2328 | entry_d->hashval = entry_s->hashval; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2329 | entry_d->nameidx = cpu_to_be16(ichdr_d->firstused); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2330 | entry_d->flags = entry_s->flags; |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 2331 | ASSERT(be16_to_cpu(entry_d->nameidx) + tmp |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | <= XFS_LBSIZE(mp)); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2333 | memmove(xfs_attr3_leaf_name(leaf_d, desti), |
| 2334 | xfs_attr3_leaf_name(leaf_s, start_s + i), tmp); |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 2335 | ASSERT(be16_to_cpu(entry_s->nameidx) + tmp |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2336 | <= XFS_LBSIZE(mp)); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2337 | memset(xfs_attr3_leaf_name(leaf_s, start_s + i), 0, tmp); |
| 2338 | ichdr_s->usedbytes -= tmp; |
| 2339 | ichdr_d->usedbytes += tmp; |
| 2340 | ichdr_s->count -= 1; |
| 2341 | ichdr_d->count += 1; |
| 2342 | tmp = ichdr_d->count * sizeof(xfs_attr_leaf_entry_t) |
| 2343 | + xfs_attr3_leaf_hdr_size(leaf_d); |
| 2344 | ASSERT(ichdr_d->firstused >= tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | #ifdef GROT |
| 2346 | } |
| 2347 | #endif /* GROT */ |
| 2348 | } |
| 2349 | |
| 2350 | /* |
| 2351 | * Zero out the entries we just copied. |
| 2352 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2353 | if (start_s == ichdr_s->count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | tmp = count * sizeof(xfs_attr_leaf_entry_t); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2355 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[start_s]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2356 | ASSERT(((char *)entry_s + tmp) <= |
| 2357 | ((char *)leaf_s + XFS_LBSIZE(mp))); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2358 | memset(entry_s, 0, tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2359 | } else { |
| 2360 | /* |
| 2361 | * Move the remaining entries down to fill the hole, |
| 2362 | * then zero the entries at the top. |
| 2363 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2364 | tmp = (ichdr_s->count - count) * sizeof(xfs_attr_leaf_entry_t); |
| 2365 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[start_s + count]; |
| 2366 | entry_d = &xfs_attr3_leaf_entryp(leaf_s)[start_s]; |
| 2367 | memmove(entry_d, entry_s, tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2368 | |
| 2369 | tmp = count * sizeof(xfs_attr_leaf_entry_t); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2370 | entry_s = &xfs_attr3_leaf_entryp(leaf_s)[ichdr_s->count]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | ASSERT(((char *)entry_s + tmp) <= |
| 2372 | ((char *)leaf_s + XFS_LBSIZE(mp))); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2373 | memset(entry_s, 0, tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2374 | } |
| 2375 | |
| 2376 | /* |
| 2377 | * Fill in the freemap information |
| 2378 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2379 | ichdr_d->freemap[0].base = xfs_attr3_leaf_hdr_size(leaf_d); |
| 2380 | ichdr_d->freemap[0].base += ichdr_d->count * sizeof(xfs_attr_leaf_entry_t); |
| 2381 | ichdr_d->freemap[0].size = ichdr_d->firstused - ichdr_d->freemap[0].base; |
| 2382 | ichdr_d->freemap[1].base = 0; |
| 2383 | ichdr_d->freemap[2].base = 0; |
| 2384 | ichdr_d->freemap[1].size = 0; |
| 2385 | ichdr_d->freemap[2].size = 0; |
| 2386 | ichdr_s->holes = 1; /* leaf may not be compact */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2387 | } |
| 2388 | |
| 2389 | /* |
| 2390 | * Pick up the last hashvalue from a leaf block. |
| 2391 | */ |
| 2392 | xfs_dahash_t |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2393 | xfs_attr_leaf_lasthash( |
| 2394 | struct xfs_buf *bp, |
| 2395 | int *count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2397 | struct xfs_attr3_icleaf_hdr ichdr; |
| 2398 | struct xfs_attr_leaf_entry *entries; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2400 | xfs_attr3_leaf_hdr_from_disk(&ichdr, bp->b_addr); |
| 2401 | entries = xfs_attr3_leaf_entryp(bp->b_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2402 | if (count) |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2403 | *count = ichdr.count; |
| 2404 | if (!ichdr.count) |
| 2405 | return 0; |
| 2406 | return be32_to_cpu(entries[ichdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | } |
| 2408 | |
| 2409 | /* |
| 2410 | * Calculate the number of bytes used to store the indicated attribute |
| 2411 | * (whether local or remote only calculate bytes in this block). |
| 2412 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 2413 | STATIC int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2414 | xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index) |
| 2415 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2416 | struct xfs_attr_leaf_entry *entries; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2417 | xfs_attr_leaf_name_local_t *name_loc; |
| 2418 | xfs_attr_leaf_name_remote_t *name_rmt; |
| 2419 | int size; |
| 2420 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2421 | entries = xfs_attr3_leaf_entryp(leaf); |
| 2422 | if (entries[index].flags & XFS_ATTR_LOCAL) { |
| 2423 | name_loc = xfs_attr3_leaf_name_local(leaf, index); |
Eric Sandeen | c9fb86a | 2009-01-01 16:40:11 -0600 | [diff] [blame] | 2424 | size = xfs_attr_leaf_entsize_local(name_loc->namelen, |
Nathan Scott | 053b575 | 2006-03-17 17:29:09 +1100 | [diff] [blame] | 2425 | be16_to_cpu(name_loc->valuelen)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2427 | name_rmt = xfs_attr3_leaf_name_remote(leaf, index); |
Eric Sandeen | c9fb86a | 2009-01-01 16:40:11 -0600 | [diff] [blame] | 2428 | size = xfs_attr_leaf_entsize_remote(name_rmt->namelen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2430 | return size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | } |
| 2432 | |
| 2433 | /* |
| 2434 | * Calculate the number of bytes that would be required to store the new |
| 2435 | * attribute (whether local or remote only calculate bytes in this block). |
| 2436 | * This routine decides as a side effect whether the attribute will be |
| 2437 | * a "local" or a "remote" attribute. |
| 2438 | */ |
| 2439 | int |
Nathan Scott | aa82daa | 2005-11-02 10:33:33 +1100 | [diff] [blame] | 2440 | xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize, int *local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2441 | { |
| 2442 | int size; |
| 2443 | |
Eric Sandeen | c9fb86a | 2009-01-01 16:40:11 -0600 | [diff] [blame] | 2444 | size = xfs_attr_leaf_entsize_local(namelen, valuelen); |
| 2445 | if (size < xfs_attr_leaf_entsize_local_max(blocksize)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2446 | if (local) { |
| 2447 | *local = 1; |
| 2448 | } |
| 2449 | } else { |
Eric Sandeen | c9fb86a | 2009-01-01 16:40:11 -0600 | [diff] [blame] | 2450 | size = xfs_attr_leaf_entsize_remote(namelen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | if (local) { |
| 2452 | *local = 0; |
| 2453 | } |
| 2454 | } |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2455 | return size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2456 | } |
| 2457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | |
| 2459 | /*======================================================================== |
| 2460 | * Manage the INCOMPLETE flag in a leaf entry |
| 2461 | *========================================================================*/ |
| 2462 | |
| 2463 | /* |
| 2464 | * Clear the INCOMPLETE flag on an entry in a leaf block. |
| 2465 | */ |
| 2466 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2467 | xfs_attr3_leaf_clearflag( |
| 2468 | struct xfs_da_args *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2469 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2470 | struct xfs_attr_leafblock *leaf; |
| 2471 | struct xfs_attr_leaf_entry *entry; |
| 2472 | struct xfs_attr_leaf_name_remote *name_rmt; |
| 2473 | struct xfs_buf *bp; |
| 2474 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | #ifdef DEBUG |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2476 | struct xfs_attr3_icleaf_hdr ichdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | xfs_attr_leaf_name_local_t *name_loc; |
| 2478 | int namelen; |
| 2479 | char *name; |
| 2480 | #endif /* DEBUG */ |
| 2481 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 2482 | trace_xfs_attr_leaf_clearflag(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | /* |
| 2484 | * Set up the operation. |
| 2485 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2486 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 2487 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | return(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2489 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2490 | leaf = bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2491 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2492 | ASSERT(entry->flags & XFS_ATTR_INCOMPLETE); |
| 2493 | |
| 2494 | #ifdef DEBUG |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2495 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
| 2496 | ASSERT(args->index < ichdr.count); |
| 2497 | ASSERT(args->index >= 0); |
| 2498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | if (entry->flags & XFS_ATTR_LOCAL) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2500 | name_loc = xfs_attr3_leaf_name_local(leaf, args->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2501 | namelen = name_loc->namelen; |
| 2502 | name = (char *)name_loc->nameval; |
| 2503 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2504 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | namelen = name_rmt->namelen; |
| 2506 | name = (char *)name_rmt->name; |
| 2507 | } |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 2508 | ASSERT(be32_to_cpu(entry->hashval) == args->hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | ASSERT(namelen == args->namelen); |
| 2510 | ASSERT(memcmp(name, args->name, namelen) == 0); |
| 2511 | #endif /* DEBUG */ |
| 2512 | |
| 2513 | entry->flags &= ~XFS_ATTR_INCOMPLETE; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2514 | xfs_trans_log_buf(args->trans, bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); |
| 2516 | |
| 2517 | if (args->rmtblkno) { |
| 2518 | ASSERT((entry->flags & XFS_ATTR_LOCAL) == 0); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2519 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
Nathan Scott | c0f054e | 2006-03-17 17:29:18 +1100 | [diff] [blame] | 2520 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
| 2521 | name_rmt->valuelen = cpu_to_be32(args->valuelen); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2522 | xfs_trans_log_buf(args->trans, bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); |
| 2524 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2525 | |
| 2526 | /* |
| 2527 | * Commit the flag value change and start the next trans in series. |
| 2528 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 2529 | return xfs_trans_roll(&args->trans, args->dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | } |
| 2531 | |
| 2532 | /* |
| 2533 | * Set the INCOMPLETE flag on an entry in a leaf block. |
| 2534 | */ |
| 2535 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2536 | xfs_attr3_leaf_setflag( |
| 2537 | struct xfs_da_args *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2539 | struct xfs_attr_leafblock *leaf; |
| 2540 | struct xfs_attr_leaf_entry *entry; |
| 2541 | struct xfs_attr_leaf_name_remote *name_rmt; |
| 2542 | struct xfs_buf *bp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | int error; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2544 | #ifdef DEBUG |
| 2545 | struct xfs_attr3_icleaf_hdr ichdr; |
| 2546 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2547 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 2548 | trace_xfs_attr_leaf_setflag(args); |
| 2549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | /* |
| 2551 | * Set up the operation. |
| 2552 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2553 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp); |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 2554 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | return(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2557 | leaf = bp->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2558 | #ifdef DEBUG |
| 2559 | xfs_attr3_leaf_hdr_from_disk(&ichdr, leaf); |
| 2560 | ASSERT(args->index < ichdr.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | ASSERT(args->index >= 0); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2562 | #endif |
| 2563 | entry = &xfs_attr3_leaf_entryp(leaf)[args->index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2564 | |
| 2565 | ASSERT((entry->flags & XFS_ATTR_INCOMPLETE) == 0); |
| 2566 | entry->flags |= XFS_ATTR_INCOMPLETE; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2567 | xfs_trans_log_buf(args->trans, bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2568 | XFS_DA_LOGRANGE(leaf, entry, sizeof(*entry))); |
| 2569 | if ((entry->flags & XFS_ATTR_LOCAL) == 0) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2570 | name_rmt = xfs_attr3_leaf_name_remote(leaf, args->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2571 | name_rmt->valueblk = 0; |
| 2572 | name_rmt->valuelen = 0; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2573 | xfs_trans_log_buf(args->trans, bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2574 | XFS_DA_LOGRANGE(leaf, name_rmt, sizeof(*name_rmt))); |
| 2575 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2576 | |
| 2577 | /* |
| 2578 | * Commit the flag value change and start the next trans in series. |
| 2579 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 2580 | return xfs_trans_roll(&args->trans, args->dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2581 | } |
| 2582 | |
| 2583 | /* |
| 2584 | * In a single transaction, clear the INCOMPLETE flag on the leaf entry |
| 2585 | * given by args->blkno/index and set the INCOMPLETE flag on the leaf |
| 2586 | * entry given by args->blkno2/index2. |
| 2587 | * |
| 2588 | * Note that they could be in different blocks, or in the same block. |
| 2589 | */ |
| 2590 | int |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2591 | xfs_attr3_leaf_flipflags( |
| 2592 | struct xfs_da_args *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2594 | struct xfs_attr_leafblock *leaf1; |
| 2595 | struct xfs_attr_leafblock *leaf2; |
| 2596 | struct xfs_attr_leaf_entry *entry1; |
| 2597 | struct xfs_attr_leaf_entry *entry2; |
| 2598 | struct xfs_attr_leaf_name_remote *name_rmt; |
| 2599 | struct xfs_buf *bp1; |
| 2600 | struct xfs_buf *bp2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | int error; |
| 2602 | #ifdef DEBUG |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2603 | struct xfs_attr3_icleaf_hdr ichdr1; |
| 2604 | struct xfs_attr3_icleaf_hdr ichdr2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | xfs_attr_leaf_name_local_t *name_loc; |
| 2606 | int namelen1, namelen2; |
| 2607 | char *name1, *name2; |
| 2608 | #endif /* DEBUG */ |
| 2609 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 2610 | trace_xfs_attr_leaf_flipflags(args); |
| 2611 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2612 | /* |
| 2613 | * Read the block containing the "old" attr |
| 2614 | */ |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2615 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno, -1, &bp1); |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 2616 | if (error) |
| 2617 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2618 | |
| 2619 | /* |
| 2620 | * Read the block containing the "new" attr, if it is different |
| 2621 | */ |
| 2622 | if (args->blkno2 != args->blkno) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2623 | error = xfs_attr3_leaf_read(args->trans, args->dp, args->blkno2, |
Dave Chinner | ad14c33 | 2012-11-12 22:54:16 +1100 | [diff] [blame] | 2624 | -1, &bp2); |
| 2625 | if (error) |
| 2626 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2627 | } else { |
| 2628 | bp2 = bp1; |
| 2629 | } |
| 2630 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2631 | leaf1 = bp1->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2632 | entry1 = &xfs_attr3_leaf_entryp(leaf1)[args->index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2634 | leaf2 = bp2->b_addr; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2635 | entry2 = &xfs_attr3_leaf_entryp(leaf2)[args->index2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | |
| 2637 | #ifdef DEBUG |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2638 | xfs_attr3_leaf_hdr_from_disk(&ichdr1, leaf1); |
| 2639 | ASSERT(args->index < ichdr1.count); |
| 2640 | ASSERT(args->index >= 0); |
| 2641 | |
| 2642 | xfs_attr3_leaf_hdr_from_disk(&ichdr2, leaf2); |
| 2643 | ASSERT(args->index2 < ichdr2.count); |
| 2644 | ASSERT(args->index2 >= 0); |
| 2645 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | if (entry1->flags & XFS_ATTR_LOCAL) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2647 | name_loc = xfs_attr3_leaf_name_local(leaf1, args->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2648 | namelen1 = name_loc->namelen; |
| 2649 | name1 = (char *)name_loc->nameval; |
| 2650 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2651 | name_rmt = xfs_attr3_leaf_name_remote(leaf1, args->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2652 | namelen1 = name_rmt->namelen; |
| 2653 | name1 = (char *)name_rmt->name; |
| 2654 | } |
| 2655 | if (entry2->flags & XFS_ATTR_LOCAL) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2656 | name_loc = xfs_attr3_leaf_name_local(leaf2, args->index2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2657 | namelen2 = name_loc->namelen; |
| 2658 | name2 = (char *)name_loc->nameval; |
| 2659 | } else { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2660 | name_rmt = xfs_attr3_leaf_name_remote(leaf2, args->index2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2661 | namelen2 = name_rmt->namelen; |
| 2662 | name2 = (char *)name_rmt->name; |
| 2663 | } |
Nathan Scott | 6b19f2d | 2006-03-17 17:29:02 +1100 | [diff] [blame] | 2664 | ASSERT(be32_to_cpu(entry1->hashval) == be32_to_cpu(entry2->hashval)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2665 | ASSERT(namelen1 == namelen2); |
| 2666 | ASSERT(memcmp(name1, name2, namelen1) == 0); |
| 2667 | #endif /* DEBUG */ |
| 2668 | |
| 2669 | ASSERT(entry1->flags & XFS_ATTR_INCOMPLETE); |
| 2670 | ASSERT((entry2->flags & XFS_ATTR_INCOMPLETE) == 0); |
| 2671 | |
| 2672 | entry1->flags &= ~XFS_ATTR_INCOMPLETE; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2673 | xfs_trans_log_buf(args->trans, bp1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | XFS_DA_LOGRANGE(leaf1, entry1, sizeof(*entry1))); |
| 2675 | if (args->rmtblkno) { |
| 2676 | ASSERT((entry1->flags & XFS_ATTR_LOCAL) == 0); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2677 | name_rmt = xfs_attr3_leaf_name_remote(leaf1, args->index); |
Nathan Scott | c0f054e | 2006-03-17 17:29:18 +1100 | [diff] [blame] | 2678 | name_rmt->valueblk = cpu_to_be32(args->rmtblkno); |
| 2679 | name_rmt->valuelen = cpu_to_be32(args->valuelen); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2680 | xfs_trans_log_buf(args->trans, bp1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2681 | XFS_DA_LOGRANGE(leaf1, name_rmt, sizeof(*name_rmt))); |
| 2682 | } |
| 2683 | |
| 2684 | entry2->flags |= XFS_ATTR_INCOMPLETE; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2685 | xfs_trans_log_buf(args->trans, bp2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | XFS_DA_LOGRANGE(leaf2, entry2, sizeof(*entry2))); |
| 2687 | if ((entry2->flags & XFS_ATTR_LOCAL) == 0) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2688 | name_rmt = xfs_attr3_leaf_name_remote(leaf2, args->index2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | name_rmt->valueblk = 0; |
| 2690 | name_rmt->valuelen = 0; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2691 | xfs_trans_log_buf(args->trans, bp2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2692 | XFS_DA_LOGRANGE(leaf2, name_rmt, sizeof(*name_rmt))); |
| 2693 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | |
| 2695 | /* |
| 2696 | * Commit the flag value change and start the next trans in series. |
| 2697 | */ |
Niv Sardi | 322ff6b | 2008-08-13 16:05:49 +1000 | [diff] [blame] | 2698 | error = xfs_trans_roll(&args->trans, args->dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2699 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 2700 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | } |