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 | f5ea110 | 2013-04-24 18:58:02 +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 | 70a9883c | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 21 | #include "xfs_shared.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 22 | #include "xfs_format.h" |
| 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_mount.h" |
Dave Chinner | 5706278 | 2013-10-15 09:17:51 +1100 | [diff] [blame] | 27 | #include "xfs_da_format.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 28 | #include "xfs_da_btree.h" |
Dave Chinner | 2b9ab5a | 2013-08-12 20:49:37 +1000 | [diff] [blame] | 29 | #include "xfs_dir2.h" |
Christoph Hellwig | 5792664 | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 30 | #include "xfs_dir2_priv.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" |
| 34 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "xfs_attr.h" |
| 37 | #include "xfs_attr_leaf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include "xfs_error.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 39 | #include "xfs_trace.h" |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 40 | #include "xfs_cksum.h" |
| 41 | #include "xfs_buf_item.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | /* |
| 44 | * xfs_da_btree.c |
| 45 | * |
| 46 | * Routines to implement directories as Btrees of hashed names. |
| 47 | */ |
| 48 | |
| 49 | /*======================================================================== |
| 50 | * Function prototypes for the kernel. |
| 51 | *========================================================================*/ |
| 52 | |
| 53 | /* |
| 54 | * Routines used for growing the Btree. |
| 55 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 56 | STATIC int xfs_da3_root_split(xfs_da_state_t *state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | xfs_da_state_blk_t *existing_root, |
| 58 | xfs_da_state_blk_t *new_child); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 59 | STATIC int xfs_da3_node_split(xfs_da_state_t *state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | xfs_da_state_blk_t *existing_blk, |
| 61 | xfs_da_state_blk_t *split_blk, |
| 62 | xfs_da_state_blk_t *blk_to_add, |
| 63 | int treelevel, |
| 64 | int *result); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 65 | STATIC void xfs_da3_node_rebalance(xfs_da_state_t *state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | xfs_da_state_blk_t *node_blk_1, |
| 67 | xfs_da_state_blk_t *node_blk_2); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 68 | STATIC void xfs_da3_node_add(xfs_da_state_t *state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | xfs_da_state_blk_t *old_node_blk, |
| 70 | xfs_da_state_blk_t *new_node_blk); |
| 71 | |
| 72 | /* |
| 73 | * Routines used for shrinking the Btree. |
| 74 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 75 | STATIC int xfs_da3_root_join(xfs_da_state_t *state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | xfs_da_state_blk_t *root_blk); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 77 | STATIC int xfs_da3_node_toosmall(xfs_da_state_t *state, int *retval); |
| 78 | STATIC void xfs_da3_node_remove(xfs_da_state_t *state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | xfs_da_state_blk_t *drop_blk); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 80 | STATIC void xfs_da3_node_unbalance(xfs_da_state_t *state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | xfs_da_state_blk_t *src_node_blk, |
| 82 | xfs_da_state_blk_t *dst_node_blk); |
| 83 | |
| 84 | /* |
| 85 | * Utility routines. |
| 86 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 87 | STATIC int xfs_da3_blk_unlink(xfs_da_state_t *state, |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 88 | xfs_da_state_blk_t *drop_blk, |
| 89 | xfs_da_state_blk_t *save_blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 91 | |
| 92 | kmem_zone_t *xfs_da_state_zone; /* anchor for state struct zone */ |
| 93 | |
| 94 | /* |
| 95 | * Allocate a dir-state structure. |
| 96 | * We don't put them on the stack since they're large. |
| 97 | */ |
| 98 | xfs_da_state_t * |
| 99 | xfs_da_state_alloc(void) |
| 100 | { |
| 101 | return kmem_zone_zalloc(xfs_da_state_zone, KM_NOFS); |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Kill the altpath contents of a da-state structure. |
| 106 | */ |
| 107 | STATIC void |
| 108 | xfs_da_state_kill_altpath(xfs_da_state_t *state) |
| 109 | { |
| 110 | int i; |
| 111 | |
| 112 | for (i = 0; i < state->altpath.active; i++) |
| 113 | state->altpath.blk[i].bp = NULL; |
| 114 | state->altpath.active = 0; |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * Free a da-state structure. |
| 119 | */ |
| 120 | void |
| 121 | xfs_da_state_free(xfs_da_state_t *state) |
| 122 | { |
| 123 | xfs_da_state_kill_altpath(state); |
| 124 | #ifdef DEBUG |
| 125 | memset((char *)state, 0, sizeof(*state)); |
| 126 | #endif /* DEBUG */ |
| 127 | kmem_zone_free(xfs_da_state_zone, state); |
| 128 | } |
| 129 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 130 | static bool |
| 131 | xfs_da3_node_verify( |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 132 | struct xfs_buf *bp) |
| 133 | { |
| 134 | struct xfs_mount *mp = bp->b_target->bt_mount; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 135 | struct xfs_da_intnode *hdr = bp->b_addr; |
| 136 | struct xfs_da3_icnode_hdr ichdr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 137 | const struct xfs_dir_ops *ops; |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 138 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 139 | ops = xfs_dir_get_ops(mp, NULL); |
| 140 | |
| 141 | ops->node_hdr_from_disk(&ichdr, hdr); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 142 | |
| 143 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 144 | struct xfs_da3_node_hdr *hdr3 = bp->b_addr; |
| 145 | |
| 146 | if (ichdr.magic != XFS_DA3_NODE_MAGIC) |
| 147 | return false; |
| 148 | |
| 149 | if (!uuid_equal(&hdr3->info.uuid, &mp->m_sb.sb_uuid)) |
| 150 | return false; |
| 151 | if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn) |
| 152 | return false; |
| 153 | } else { |
| 154 | if (ichdr.magic != XFS_DA_NODE_MAGIC) |
| 155 | return false; |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 156 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 157 | if (ichdr.level == 0) |
| 158 | return false; |
| 159 | if (ichdr.level > XFS_DA_NODE_MAXDEPTH) |
| 160 | return false; |
| 161 | if (ichdr.count == 0) |
| 162 | return false; |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 163 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 164 | /* |
| 165 | * we don't know if the node is for and attribute or directory tree, |
| 166 | * so only fail if the count is outside both bounds |
| 167 | */ |
Dave Chinner | 7ab610f | 2014-06-06 15:20:02 +1000 | [diff] [blame] | 168 | if (ichdr.count > mp->m_dir_geo->node_ents && |
| 169 | ichdr.count > mp->m_attr_geo->node_ents) |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 170 | return false; |
| 171 | |
| 172 | /* XXX: hash order check? */ |
| 173 | |
| 174 | return true; |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | static void |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 178 | xfs_da3_node_write_verify( |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 179 | struct xfs_buf *bp) |
| 180 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 181 | struct xfs_mount *mp = bp->b_target->bt_mount; |
| 182 | struct xfs_buf_log_item *bip = bp->b_fspriv; |
| 183 | struct xfs_da3_node_hdr *hdr3 = bp->b_addr; |
| 184 | |
| 185 | if (!xfs_da3_node_verify(bp)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 186 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
Eric Sandeen | ce5028c | 2014-02-27 15:23:10 +1100 | [diff] [blame] | 187 | xfs_verifier_error(bp); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 188 | return; |
| 189 | } |
| 190 | |
| 191 | if (!xfs_sb_version_hascrc(&mp->m_sb)) |
| 192 | return; |
| 193 | |
| 194 | if (bip) |
| 195 | hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn); |
| 196 | |
Eric Sandeen | f1dbcd7 | 2014-02-27 15:18:23 +1100 | [diff] [blame] | 197 | xfs_buf_update_cksum(bp, XFS_DA3_NODE_CRC_OFF); |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 198 | } |
| 199 | |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 200 | /* |
| 201 | * leaf/node format detection on trees is sketchy, so a node read can be done on |
| 202 | * leaf level blocks when detection identifies the tree as a node format tree |
| 203 | * incorrectly. In this case, we need to swap the verifier to match the correct |
| 204 | * format of the block being read. |
| 205 | */ |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 206 | static void |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 207 | xfs_da3_node_read_verify( |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 208 | struct xfs_buf *bp) |
| 209 | { |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 210 | struct xfs_da_blkinfo *info = bp->b_addr; |
| 211 | |
| 212 | switch (be16_to_cpu(info->magic)) { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 213 | case XFS_DA3_NODE_MAGIC: |
Eric Sandeen | ce5028c | 2014-02-27 15:23:10 +1100 | [diff] [blame] | 214 | if (!xfs_buf_verify_cksum(bp, XFS_DA3_NODE_CRC_OFF)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 215 | xfs_buf_ioerror(bp, -EFSBADCRC); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 216 | break; |
Eric Sandeen | ce5028c | 2014-02-27 15:23:10 +1100 | [diff] [blame] | 217 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 218 | /* fall through */ |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 219 | case XFS_DA_NODE_MAGIC: |
Eric Sandeen | ce5028c | 2014-02-27 15:23:10 +1100 | [diff] [blame] | 220 | if (!xfs_da3_node_verify(bp)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 221 | xfs_buf_ioerror(bp, -EFSCORRUPTED); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 222 | break; |
Eric Sandeen | ce5028c | 2014-02-27 15:23:10 +1100 | [diff] [blame] | 223 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 224 | return; |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 225 | case XFS_ATTR_LEAF_MAGIC: |
Dave Chinner | 7ced60c | 2013-05-20 09:51:13 +1000 | [diff] [blame] | 226 | case XFS_ATTR3_LEAF_MAGIC: |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 227 | bp->b_ops = &xfs_attr3_leaf_buf_ops; |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 228 | bp->b_ops->verify_read(bp); |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 229 | return; |
| 230 | case XFS_DIR2_LEAFN_MAGIC: |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 231 | case XFS_DIR3_LEAFN_MAGIC: |
| 232 | bp->b_ops = &xfs_dir3_leafn_buf_ops; |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 233 | bp->b_ops->verify_read(bp); |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 234 | return; |
| 235 | default: |
| 236 | break; |
| 237 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 238 | |
| 239 | /* corrupt block */ |
Eric Sandeen | ce5028c | 2014-02-27 15:23:10 +1100 | [diff] [blame] | 240 | xfs_verifier_error(bp); |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 241 | } |
| 242 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 243 | const struct xfs_buf_ops xfs_da3_node_buf_ops = { |
| 244 | .verify_read = xfs_da3_node_read_verify, |
| 245 | .verify_write = xfs_da3_node_write_verify, |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 246 | }; |
| 247 | |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 248 | int |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 249 | xfs_da3_node_read( |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 250 | struct xfs_trans *tp, |
| 251 | struct xfs_inode *dp, |
| 252 | xfs_dablk_t bno, |
| 253 | xfs_daddr_t mappedbno, |
| 254 | struct xfs_buf **bpp, |
| 255 | int which_fork) |
| 256 | { |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 257 | int err; |
| 258 | |
| 259 | err = xfs_da_read_buf(tp, dp, bno, mappedbno, bpp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 260 | which_fork, &xfs_da3_node_buf_ops); |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 261 | if (!err && tp) { |
| 262 | struct xfs_da_blkinfo *info = (*bpp)->b_addr; |
| 263 | int type; |
| 264 | |
| 265 | switch (be16_to_cpu(info->magic)) { |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 266 | case XFS_DA_NODE_MAGIC: |
Dave Chinner | cab09a8 | 2013-04-30 21:39:36 +1000 | [diff] [blame] | 267 | case XFS_DA3_NODE_MAGIC: |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 268 | type = XFS_BLFT_DA_NODE_BUF; |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 269 | break; |
| 270 | case XFS_ATTR_LEAF_MAGIC: |
| 271 | case XFS_ATTR3_LEAF_MAGIC: |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 272 | type = XFS_BLFT_ATTR_LEAF_BUF; |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 273 | break; |
| 274 | case XFS_DIR2_LEAFN_MAGIC: |
| 275 | case XFS_DIR3_LEAFN_MAGIC: |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 276 | type = XFS_BLFT_DIR_LEAFN_BUF; |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 277 | break; |
| 278 | default: |
| 279 | type = 0; |
| 280 | ASSERT(0); |
| 281 | break; |
| 282 | } |
| 283 | xfs_trans_buf_set_type(tp, *bpp, type); |
| 284 | } |
| 285 | return err; |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 286 | } |
| 287 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | /*======================================================================== |
| 289 | * Routines used for growing the Btree. |
| 290 | *========================================================================*/ |
| 291 | |
| 292 | /* |
| 293 | * Create the initial contents of an intermediate node. |
| 294 | */ |
| 295 | int |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 296 | xfs_da3_node_create( |
| 297 | struct xfs_da_args *args, |
| 298 | xfs_dablk_t blkno, |
| 299 | int level, |
| 300 | struct xfs_buf **bpp, |
| 301 | int whichfork) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 303 | struct xfs_da_intnode *node; |
| 304 | struct xfs_trans *tp = args->trans; |
| 305 | struct xfs_mount *mp = tp->t_mountp; |
| 306 | struct xfs_da3_icnode_hdr ichdr = {0}; |
| 307 | struct xfs_buf *bp; |
| 308 | int error; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 309 | struct xfs_inode *dp = args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 311 | trace_xfs_da_node_create(args); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 312 | ASSERT(level <= XFS_DA_NODE_MAXDEPTH); |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 313 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 314 | error = xfs_da_get_buf(tp, dp, blkno, -1, &bp, whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 316 | return error; |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 317 | bp->b_ops = &xfs_da3_node_buf_ops; |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 318 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DA_NODE_BUF); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 319 | node = bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 321 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 322 | struct xfs_da3_node_hdr *hdr3 = bp->b_addr; |
| 323 | |
| 324 | ichdr.magic = XFS_DA3_NODE_MAGIC; |
| 325 | hdr3->info.blkno = cpu_to_be64(bp->b_bn); |
| 326 | hdr3->info.owner = cpu_to_be64(args->dp->i_ino); |
| 327 | uuid_copy(&hdr3->info.uuid, &mp->m_sb.sb_uuid); |
| 328 | } else { |
| 329 | ichdr.magic = XFS_DA_NODE_MAGIC; |
| 330 | } |
| 331 | ichdr.level = level; |
| 332 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 333 | dp->d_ops->node_hdr_to_disk(node, &ichdr); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 334 | xfs_trans_log_buf(tp, bp, |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 335 | XFS_DA_LOGRANGE(node, &node->hdr, dp->d_ops->node_hdr_size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
| 337 | *bpp = bp; |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 338 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
| 340 | |
| 341 | /* |
| 342 | * Split a leaf node, rebalance, then possibly split |
| 343 | * intermediate nodes, rebalance, etc. |
| 344 | */ |
| 345 | int /* error */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 346 | xfs_da3_split( |
| 347 | struct xfs_da_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 349 | struct xfs_da_state_blk *oldblk; |
| 350 | struct xfs_da_state_blk *newblk; |
| 351 | struct xfs_da_state_blk *addblk; |
| 352 | struct xfs_da_intnode *node; |
| 353 | struct xfs_buf *bp; |
| 354 | int max; |
Dave Chinner | 836a94a | 2013-08-12 20:49:44 +1000 | [diff] [blame] | 355 | int action = 0; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 356 | int error; |
| 357 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 359 | trace_xfs_da_split(state->args); |
| 360 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | /* |
| 362 | * Walk back up the tree splitting/inserting/adjusting as necessary. |
| 363 | * If we need to insert and there isn't room, split the node, then |
| 364 | * decide which fragment to insert the new block from below into. |
| 365 | * Note that we may split the root this way, but we need more fixup. |
| 366 | */ |
| 367 | max = state->path.active - 1; |
| 368 | ASSERT((max >= 0) && (max < XFS_DA_NODE_MAXDEPTH)); |
| 369 | ASSERT(state->path.blk[max].magic == XFS_ATTR_LEAF_MAGIC || |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 370 | state->path.blk[max].magic == XFS_DIR2_LEAFN_MAGIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
| 372 | addblk = &state->path.blk[max]; /* initial dummy value */ |
| 373 | for (i = max; (i >= 0) && addblk; state->path.active--, i--) { |
| 374 | oldblk = &state->path.blk[i]; |
| 375 | newblk = &state->altpath.blk[i]; |
| 376 | |
| 377 | /* |
| 378 | * If a leaf node then |
| 379 | * Allocate a new leaf node, then rebalance across them. |
| 380 | * else if an intermediate node then |
| 381 | * We split on the last layer, must we split the node? |
| 382 | */ |
| 383 | switch (oldblk->magic) { |
| 384 | case XFS_ATTR_LEAF_MAGIC: |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 385 | error = xfs_attr3_leaf_split(state, oldblk, newblk); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 386 | if ((error != 0) && (error != -ENOSPC)) { |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 387 | return error; /* GROT: attr is inconsistent */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
| 389 | if (!error) { |
| 390 | addblk = newblk; |
| 391 | break; |
| 392 | } |
| 393 | /* |
| 394 | * Entry wouldn't fit, split the leaf again. |
| 395 | */ |
| 396 | state->extravalid = 1; |
| 397 | if (state->inleaf) { |
| 398 | state->extraafter = 0; /* before newblk */ |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 399 | trace_xfs_attr_leaf_split_before(state->args); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 400 | error = xfs_attr3_leaf_split(state, oldblk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | &state->extrablk); |
| 402 | } else { |
| 403 | state->extraafter = 1; /* after newblk */ |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 404 | trace_xfs_attr_leaf_split_after(state->args); |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 405 | error = xfs_attr3_leaf_split(state, newblk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | &state->extrablk); |
| 407 | } |
| 408 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 409 | return error; /* GROT: attr inconsistent */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | addblk = newblk; |
| 411 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | case XFS_DIR2_LEAFN_MAGIC: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | error = xfs_dir2_leafn_split(state, oldblk, newblk); |
| 414 | if (error) |
| 415 | return error; |
| 416 | addblk = newblk; |
| 417 | break; |
| 418 | case XFS_DA_NODE_MAGIC: |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 419 | error = xfs_da3_node_split(state, oldblk, newblk, addblk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | max - i, &action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | addblk->bp = NULL; |
| 422 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 423 | return error; /* GROT: dir is inconsistent */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | /* |
| 425 | * Record the newly split block for the next time thru? |
| 426 | */ |
| 427 | if (action) |
| 428 | addblk = newblk; |
| 429 | else |
| 430 | addblk = NULL; |
| 431 | break; |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * Update the btree to show the new hashval for this child. |
| 436 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 437 | xfs_da3_fixhashpath(state, &state->path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | if (!addblk) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 440 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | |
| 442 | /* |
| 443 | * Split the root node. |
| 444 | */ |
| 445 | ASSERT(state->path.active == 0); |
| 446 | oldblk = &state->path.blk[0]; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 447 | error = xfs_da3_root_split(state, oldblk, addblk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | addblk->bp = NULL; |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 450 | return error; /* GROT: dir is inconsistent */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } |
| 452 | |
| 453 | /* |
| 454 | * Update pointers to the node which used to be block 0 and |
| 455 | * just got bumped because of the addition of a new root node. |
| 456 | * There might be three blocks involved if a double split occurred, |
| 457 | * and the original block 0 could be at any position in the list. |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 458 | * |
| 459 | * Note: the magic numbers and sibling pointers are in the same |
| 460 | * physical place for both v2 and v3 headers (by design). Hence it |
| 461 | * doesn't matter which version of the xfs_da_intnode structure we use |
| 462 | * here as the result will be the same using either structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 464 | node = oldblk->bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | if (node->hdr.info.forw) { |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 466 | if (be32_to_cpu(node->hdr.info.forw) == addblk->blkno) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | bp = addblk->bp; |
| 468 | } else { |
| 469 | ASSERT(state->extravalid); |
| 470 | bp = state->extrablk.bp; |
| 471 | } |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 472 | node = bp->b_addr; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 473 | node->hdr.info.back = cpu_to_be32(oldblk->blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 474 | xfs_trans_log_buf(state->args->trans, bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | XFS_DA_LOGRANGE(node, &node->hdr.info, |
| 476 | sizeof(node->hdr.info))); |
| 477 | } |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 478 | node = oldblk->bp->b_addr; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 479 | if (node->hdr.info.back) { |
| 480 | if (be32_to_cpu(node->hdr.info.back) == addblk->blkno) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | bp = addblk->bp; |
| 482 | } else { |
| 483 | ASSERT(state->extravalid); |
| 484 | bp = state->extrablk.bp; |
| 485 | } |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 486 | node = bp->b_addr; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 487 | node->hdr.info.forw = cpu_to_be32(oldblk->blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 488 | xfs_trans_log_buf(state->args->trans, bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | XFS_DA_LOGRANGE(node, &node->hdr.info, |
| 490 | sizeof(node->hdr.info))); |
| 491 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | addblk->bp = NULL; |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 493 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | /* |
| 497 | * Split the root. We have to create a new root and point to the two |
| 498 | * parts (the split old root) that we just created. Copy block zero to |
| 499 | * the EOF, extending the inode in process. |
| 500 | */ |
| 501 | STATIC int /* error */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 502 | xfs_da3_root_split( |
| 503 | struct xfs_da_state *state, |
| 504 | struct xfs_da_state_blk *blk1, |
| 505 | struct xfs_da_state_blk *blk2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 507 | struct xfs_da_intnode *node; |
| 508 | struct xfs_da_intnode *oldroot; |
| 509 | struct xfs_da_node_entry *btree; |
| 510 | struct xfs_da3_icnode_hdr nodehdr; |
| 511 | struct xfs_da_args *args; |
| 512 | struct xfs_buf *bp; |
| 513 | struct xfs_inode *dp; |
| 514 | struct xfs_trans *tp; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 515 | struct xfs_dir2_leaf *leaf; |
| 516 | xfs_dablk_t blkno; |
| 517 | int level; |
| 518 | int error; |
| 519 | int size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 521 | trace_xfs_da_root_split(state->args); |
| 522 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | /* |
| 524 | * Copy the existing (incorrect) block from the root node position |
| 525 | * to a free space somewhere. |
| 526 | */ |
| 527 | args = state->args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | error = xfs_da_grow_inode(args, &blkno); |
| 529 | if (error) |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 530 | return error; |
| 531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | dp = args->dp; |
| 533 | tp = args->trans; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | error = xfs_da_get_buf(tp, dp, blkno, -1, &bp, args->whichfork); |
| 535 | if (error) |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 536 | return error; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 537 | node = bp->b_addr; |
| 538 | oldroot = blk1->bp->b_addr; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 539 | if (oldroot->hdr.info.magic == cpu_to_be16(XFS_DA_NODE_MAGIC) || |
| 540 | oldroot->hdr.info.magic == cpu_to_be16(XFS_DA3_NODE_MAGIC)) { |
Fabian Frederick | 29916df | 2015-03-25 14:55:25 +1100 | [diff] [blame] | 541 | struct xfs_da3_icnode_hdr icnodehdr; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 542 | |
Fabian Frederick | 29916df | 2015-03-25 14:55:25 +1100 | [diff] [blame] | 543 | dp->d_ops->node_hdr_from_disk(&icnodehdr, oldroot); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 544 | btree = dp->d_ops->node_tree_p(oldroot); |
Fabian Frederick | 29916df | 2015-03-25 14:55:25 +1100 | [diff] [blame] | 545 | size = (int)((char *)&btree[icnodehdr.count] - (char *)oldroot); |
| 546 | level = icnodehdr.level; |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 547 | |
| 548 | /* |
| 549 | * we are about to copy oldroot to bp, so set up the type |
| 550 | * of bp while we know exactly what it will be. |
| 551 | */ |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 552 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DA_NODE_BUF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | } else { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 554 | struct xfs_dir3_icleaf_hdr leafhdr; |
| 555 | struct xfs_dir2_leaf_entry *ents; |
| 556 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | leaf = (xfs_dir2_leaf_t *)oldroot; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 558 | dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 559 | ents = dp->d_ops->leaf_ents_p(leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 560 | |
| 561 | ASSERT(leafhdr.magic == XFS_DIR2_LEAFN_MAGIC || |
| 562 | leafhdr.magic == XFS_DIR3_LEAFN_MAGIC); |
| 563 | size = (int)((char *)&ents[leafhdr.count] - (char *)leaf); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 564 | level = 0; |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 565 | |
| 566 | /* |
| 567 | * we are about to copy oldroot to bp, so set up the type |
| 568 | * of bp while we know exactly what it will be. |
| 569 | */ |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 570 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAFN_BUF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 572 | |
| 573 | /* |
| 574 | * we can copy most of the information in the node from one block to |
| 575 | * another, but for CRC enabled headers we have to make sure that the |
| 576 | * block specific identifiers are kept intact. We update the buffer |
| 577 | * directly for this. |
| 578 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | memcpy(node, oldroot, size); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 580 | if (oldroot->hdr.info.magic == cpu_to_be16(XFS_DA3_NODE_MAGIC) || |
| 581 | oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)) { |
| 582 | struct xfs_da3_intnode *node3 = (struct xfs_da3_intnode *)node; |
| 583 | |
| 584 | node3->hdr.info.blkno = cpu_to_be64(bp->b_bn); |
| 585 | } |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 586 | xfs_trans_log_buf(tp, bp, 0, size - 1); |
Dave Chinner | b0f539d | 2012-11-14 17:53:49 +1100 | [diff] [blame] | 587 | |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 588 | bp->b_ops = blk1->bp->b_ops; |
Dave Chinner | 0a4edc8 | 2013-09-02 10:32:01 +1000 | [diff] [blame] | 589 | xfs_trans_buf_copy_type(bp, blk1->bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | blk1->bp = bp; |
| 591 | blk1->blkno = blkno; |
| 592 | |
| 593 | /* |
| 594 | * Set up the new root node. |
| 595 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 596 | error = xfs_da3_node_create(args, |
Dave Chinner | 7dda6e8 | 2014-06-06 15:11:18 +1000 | [diff] [blame] | 597 | (args->whichfork == XFS_DATA_FORK) ? args->geo->leafblk : 0, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 598 | level + 1, &bp, args->whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | if (error) |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 600 | return error; |
| 601 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 602 | node = bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 603 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 604 | btree = dp->d_ops->node_tree_p(node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 605 | btree[0].hashval = cpu_to_be32(blk1->hashval); |
| 606 | btree[0].before = cpu_to_be32(blk1->blkno); |
| 607 | btree[1].hashval = cpu_to_be32(blk2->hashval); |
| 608 | btree[1].before = cpu_to_be32(blk2->blkno); |
| 609 | nodehdr.count = 2; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 610 | dp->d_ops->node_hdr_to_disk(node, &nodehdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | |
| 612 | #ifdef DEBUG |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 613 | if (oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) || |
| 614 | oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)) { |
Dave Chinner | 7dda6e8 | 2014-06-06 15:11:18 +1000 | [diff] [blame] | 615 | ASSERT(blk1->blkno >= args->geo->leafblk && |
| 616 | blk1->blkno < args->geo->freeblk); |
| 617 | ASSERT(blk2->blkno >= args->geo->leafblk && |
| 618 | blk2->blkno < args->geo->freeblk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | } |
| 620 | #endif |
| 621 | |
| 622 | /* Header is already logged by xfs_da_node_create */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 623 | xfs_trans_log_buf(tp, bp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 624 | XFS_DA_LOGRANGE(node, btree, sizeof(xfs_da_node_entry_t) * 2)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 626 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | } |
| 628 | |
| 629 | /* |
| 630 | * Split the node, rebalance, then add the new entry. |
| 631 | */ |
| 632 | STATIC int /* error */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 633 | xfs_da3_node_split( |
| 634 | struct xfs_da_state *state, |
| 635 | struct xfs_da_state_blk *oldblk, |
| 636 | struct xfs_da_state_blk *newblk, |
| 637 | struct xfs_da_state_blk *addblk, |
| 638 | int treelevel, |
| 639 | int *result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 641 | struct xfs_da_intnode *node; |
| 642 | struct xfs_da3_icnode_hdr nodehdr; |
| 643 | xfs_dablk_t blkno; |
| 644 | int newcount; |
| 645 | int error; |
| 646 | int useextra; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 647 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 649 | trace_xfs_da_node_split(state->args); |
| 650 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 651 | node = oldblk->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 652 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
| 654 | /* |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 655 | * With V2 dirs the extra block is data or freespace. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 657 | useextra = state->extravalid && state->args->whichfork == XFS_ATTR_FORK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | newcount = 1 + useextra; |
| 659 | /* |
| 660 | * Do we have to split the node? |
| 661 | */ |
Dave Chinner | b2a21e7 | 2014-06-06 15:22:04 +1000 | [diff] [blame] | 662 | if (nodehdr.count + newcount > state->args->geo->node_ents) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | /* |
| 664 | * Allocate a new node, add to the doubly linked chain of |
| 665 | * nodes, then move some of our excess entries into it. |
| 666 | */ |
| 667 | error = xfs_da_grow_inode(state->args, &blkno); |
| 668 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 669 | return error; /* GROT: dir is inconsistent */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 671 | error = xfs_da3_node_create(state->args, blkno, treelevel, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | &newblk->bp, state->args->whichfork); |
| 673 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 674 | return error; /* GROT: dir is inconsistent */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | newblk->blkno = blkno; |
| 676 | newblk->magic = XFS_DA_NODE_MAGIC; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 677 | xfs_da3_node_rebalance(state, oldblk, newblk); |
| 678 | error = xfs_da3_blk_link(state, oldblk, newblk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 680 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | *result = 1; |
| 682 | } else { |
| 683 | *result = 0; |
| 684 | } |
| 685 | |
| 686 | /* |
| 687 | * Insert the new entry(s) into the correct block |
| 688 | * (updating last hashval in the process). |
| 689 | * |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 690 | * xfs_da3_node_add() inserts BEFORE the given index, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | * and as a result of using node_lookup_int() we always |
| 692 | * point to a valid entry (not after one), but a split |
| 693 | * operation always results in a new block whose hashvals |
| 694 | * FOLLOW the current block. |
| 695 | * |
| 696 | * If we had double-split op below us, then add the extra block too. |
| 697 | */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 698 | node = oldblk->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 699 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 700 | if (oldblk->index <= nodehdr.count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | oldblk->index++; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 702 | xfs_da3_node_add(state, oldblk, addblk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | if (useextra) { |
| 704 | if (state->extraafter) |
| 705 | oldblk->index++; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 706 | xfs_da3_node_add(state, oldblk, &state->extrablk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | state->extravalid = 0; |
| 708 | } |
| 709 | } else { |
| 710 | newblk->index++; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 711 | xfs_da3_node_add(state, newblk, addblk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | if (useextra) { |
| 713 | if (state->extraafter) |
| 714 | newblk->index++; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 715 | xfs_da3_node_add(state, newblk, &state->extrablk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | state->extravalid = 0; |
| 717 | } |
| 718 | } |
| 719 | |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 720 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | } |
| 722 | |
| 723 | /* |
| 724 | * Balance the btree elements between two intermediate nodes, |
| 725 | * usually one full and one empty. |
| 726 | * |
| 727 | * NOTE: if blk2 is empty, then it will get the upper half of blk1. |
| 728 | */ |
| 729 | STATIC void |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 730 | xfs_da3_node_rebalance( |
| 731 | struct xfs_da_state *state, |
| 732 | struct xfs_da_state_blk *blk1, |
| 733 | struct xfs_da_state_blk *blk2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 735 | struct xfs_da_intnode *node1; |
| 736 | struct xfs_da_intnode *node2; |
| 737 | struct xfs_da_intnode *tmpnode; |
| 738 | struct xfs_da_node_entry *btree1; |
| 739 | struct xfs_da_node_entry *btree2; |
| 740 | struct xfs_da_node_entry *btree_s; |
| 741 | struct xfs_da_node_entry *btree_d; |
| 742 | struct xfs_da3_icnode_hdr nodehdr1; |
| 743 | struct xfs_da3_icnode_hdr nodehdr2; |
| 744 | struct xfs_trans *tp; |
| 745 | int count; |
| 746 | int tmp; |
| 747 | int swap = 0; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 748 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 750 | trace_xfs_da_node_rebalance(state->args); |
| 751 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 752 | node1 = blk1->bp->b_addr; |
| 753 | node2 = blk2->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 754 | dp->d_ops->node_hdr_from_disk(&nodehdr1, node1); |
| 755 | dp->d_ops->node_hdr_from_disk(&nodehdr2, node2); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 756 | btree1 = dp->d_ops->node_tree_p(node1); |
| 757 | btree2 = dp->d_ops->node_tree_p(node2); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | /* |
| 760 | * Figure out how many entries need to move, and in which direction. |
| 761 | * Swap the nodes around if that makes it simpler. |
| 762 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 763 | if (nodehdr1.count > 0 && nodehdr2.count > 0 && |
| 764 | ((be32_to_cpu(btree2[0].hashval) < be32_to_cpu(btree1[0].hashval)) || |
| 765 | (be32_to_cpu(btree2[nodehdr2.count - 1].hashval) < |
| 766 | be32_to_cpu(btree1[nodehdr1.count - 1].hashval)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | tmpnode = node1; |
| 768 | node1 = node2; |
| 769 | node2 = tmpnode; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 770 | dp->d_ops->node_hdr_from_disk(&nodehdr1, node1); |
| 771 | dp->d_ops->node_hdr_from_disk(&nodehdr2, node2); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 772 | btree1 = dp->d_ops->node_tree_p(node1); |
| 773 | btree2 = dp->d_ops->node_tree_p(node2); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 774 | swap = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 776 | |
| 777 | count = (nodehdr1.count - nodehdr2.count) / 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | if (count == 0) |
| 779 | return; |
| 780 | tp = state->args->trans; |
| 781 | /* |
| 782 | * Two cases: high-to-low and low-to-high. |
| 783 | */ |
| 784 | if (count > 0) { |
| 785 | /* |
| 786 | * Move elements in node2 up to make a hole. |
| 787 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 788 | tmp = nodehdr2.count; |
| 789 | if (tmp > 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | tmp *= (uint)sizeof(xfs_da_node_entry_t); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 791 | btree_s = &btree2[0]; |
| 792 | btree_d = &btree2[count]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | memmove(btree_d, btree_s, tmp); |
| 794 | } |
| 795 | |
| 796 | /* |
| 797 | * Move the req'd B-tree elements from high in node1 to |
| 798 | * low in node2. |
| 799 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 800 | nodehdr2.count += count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | tmp = count * (uint)sizeof(xfs_da_node_entry_t); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 802 | btree_s = &btree1[nodehdr1.count - count]; |
| 803 | btree_d = &btree2[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | memcpy(btree_d, btree_s, tmp); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 805 | nodehdr1.count -= count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | } else { |
| 807 | /* |
| 808 | * Move the req'd B-tree elements from low in node2 to |
| 809 | * high in node1. |
| 810 | */ |
| 811 | count = -count; |
| 812 | tmp = count * (uint)sizeof(xfs_da_node_entry_t); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 813 | btree_s = &btree2[0]; |
| 814 | btree_d = &btree1[nodehdr1.count]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | memcpy(btree_d, btree_s, tmp); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 816 | nodehdr1.count += count; |
| 817 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 818 | xfs_trans_log_buf(tp, blk1->bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | XFS_DA_LOGRANGE(node1, btree_d, tmp)); |
| 820 | |
| 821 | /* |
| 822 | * Move elements in node2 down to fill the hole. |
| 823 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 824 | tmp = nodehdr2.count - count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | tmp *= (uint)sizeof(xfs_da_node_entry_t); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 826 | btree_s = &btree2[count]; |
| 827 | btree_d = &btree2[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | memmove(btree_d, btree_s, tmp); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 829 | nodehdr2.count -= count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | } |
| 831 | |
| 832 | /* |
| 833 | * Log header of node 1 and all current bits of node 2. |
| 834 | */ |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 835 | dp->d_ops->node_hdr_to_disk(node1, &nodehdr1); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 836 | xfs_trans_log_buf(tp, blk1->bp, |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 837 | XFS_DA_LOGRANGE(node1, &node1->hdr, dp->d_ops->node_hdr_size)); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 838 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 839 | dp->d_ops->node_hdr_to_disk(node2, &nodehdr2); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 840 | xfs_trans_log_buf(tp, blk2->bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | XFS_DA_LOGRANGE(node2, &node2->hdr, |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 842 | dp->d_ops->node_hdr_size + |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 843 | (sizeof(btree2[0]) * nodehdr2.count))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | |
| 845 | /* |
| 846 | * Record the last hashval from each block for upward propagation. |
| 847 | * (note: don't use the swapped node pointers) |
| 848 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 849 | if (swap) { |
| 850 | node1 = blk1->bp->b_addr; |
| 851 | node2 = blk2->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 852 | dp->d_ops->node_hdr_from_disk(&nodehdr1, node1); |
| 853 | dp->d_ops->node_hdr_from_disk(&nodehdr2, node2); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 854 | btree1 = dp->d_ops->node_tree_p(node1); |
| 855 | btree2 = dp->d_ops->node_tree_p(node2); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 856 | } |
| 857 | blk1->hashval = be32_to_cpu(btree1[nodehdr1.count - 1].hashval); |
| 858 | blk2->hashval = be32_to_cpu(btree2[nodehdr2.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | |
| 860 | /* |
| 861 | * Adjust the expected index for insertion. |
| 862 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 863 | if (blk1->index >= nodehdr1.count) { |
| 864 | blk2->index = blk1->index - nodehdr1.count; |
| 865 | blk1->index = nodehdr1.count + 1; /* make it invalid */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | } |
| 867 | } |
| 868 | |
| 869 | /* |
| 870 | * Add a new entry to an intermediate node. |
| 871 | */ |
| 872 | STATIC void |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 873 | xfs_da3_node_add( |
| 874 | struct xfs_da_state *state, |
| 875 | struct xfs_da_state_blk *oldblk, |
| 876 | struct xfs_da_state_blk *newblk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 878 | struct xfs_da_intnode *node; |
| 879 | struct xfs_da3_icnode_hdr nodehdr; |
| 880 | struct xfs_da_node_entry *btree; |
| 881 | int tmp; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 882 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 884 | trace_xfs_da_node_add(state->args); |
| 885 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 886 | node = oldblk->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 887 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 888 | btree = dp->d_ops->node_tree_p(node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 889 | |
| 890 | ASSERT(oldblk->index >= 0 && oldblk->index <= nodehdr.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | ASSERT(newblk->blkno != 0); |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 892 | if (state->args->whichfork == XFS_DATA_FORK) |
Dave Chinner | 7dda6e8 | 2014-06-06 15:11:18 +1000 | [diff] [blame] | 893 | ASSERT(newblk->blkno >= state->args->geo->leafblk && |
| 894 | newblk->blkno < state->args->geo->freeblk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | |
| 896 | /* |
| 897 | * We may need to make some room before we insert the new node. |
| 898 | */ |
| 899 | tmp = 0; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 900 | if (oldblk->index < nodehdr.count) { |
| 901 | tmp = (nodehdr.count - oldblk->index) * (uint)sizeof(*btree); |
| 902 | memmove(&btree[oldblk->index + 1], &btree[oldblk->index], tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 904 | btree[oldblk->index].hashval = cpu_to_be32(newblk->hashval); |
| 905 | btree[oldblk->index].before = cpu_to_be32(newblk->blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 906 | xfs_trans_log_buf(state->args->trans, oldblk->bp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 907 | XFS_DA_LOGRANGE(node, &btree[oldblk->index], |
| 908 | tmp + sizeof(*btree))); |
| 909 | |
| 910 | nodehdr.count += 1; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 911 | dp->d_ops->node_hdr_to_disk(node, &nodehdr); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 912 | xfs_trans_log_buf(state->args->trans, oldblk->bp, |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 913 | XFS_DA_LOGRANGE(node, &node->hdr, dp->d_ops->node_hdr_size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
| 915 | /* |
| 916 | * Copy the last hash value from the oldblk to propagate upwards. |
| 917 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 918 | oldblk->hashval = be32_to_cpu(btree[nodehdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | } |
| 920 | |
| 921 | /*======================================================================== |
| 922 | * Routines used for shrinking the Btree. |
| 923 | *========================================================================*/ |
| 924 | |
| 925 | /* |
| 926 | * Deallocate an empty leaf node, remove it from its parent, |
| 927 | * possibly deallocating that block, etc... |
| 928 | */ |
| 929 | int |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 930 | xfs_da3_join( |
| 931 | struct xfs_da_state *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 933 | struct xfs_da_state_blk *drop_blk; |
| 934 | struct xfs_da_state_blk *save_blk; |
| 935 | int action = 0; |
| 936 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 938 | trace_xfs_da_join(state->args); |
| 939 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | drop_blk = &state->path.blk[ state->path.active-1 ]; |
| 941 | save_blk = &state->altpath.blk[ state->path.active-1 ]; |
| 942 | ASSERT(state->path.blk[0].magic == XFS_DA_NODE_MAGIC); |
| 943 | ASSERT(drop_blk->magic == XFS_ATTR_LEAF_MAGIC || |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 944 | drop_blk->magic == XFS_DIR2_LEAFN_MAGIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | /* |
| 947 | * Walk back up the tree joining/deallocating as necessary. |
| 948 | * When we stop dropping blocks, break out. |
| 949 | */ |
| 950 | for ( ; state->path.active >= 2; drop_blk--, save_blk--, |
| 951 | state->path.active--) { |
| 952 | /* |
| 953 | * See if we can combine the block with a neighbor. |
| 954 | * (action == 0) => no options, just leave |
| 955 | * (action == 1) => coalesce, then unlink |
| 956 | * (action == 2) => block empty, unlink it |
| 957 | */ |
| 958 | switch (drop_blk->magic) { |
| 959 | case XFS_ATTR_LEAF_MAGIC: |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 960 | error = xfs_attr3_leaf_toosmall(state, &action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 962 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | if (action == 0) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 964 | return 0; |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 965 | xfs_attr3_leaf_unbalance(state, drop_blk, save_blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | case XFS_DIR2_LEAFN_MAGIC: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | error = xfs_dir2_leafn_toosmall(state, &action); |
| 969 | if (error) |
| 970 | return error; |
| 971 | if (action == 0) |
| 972 | return 0; |
| 973 | xfs_dir2_leafn_unbalance(state, drop_blk, save_blk); |
| 974 | break; |
| 975 | case XFS_DA_NODE_MAGIC: |
| 976 | /* |
| 977 | * Remove the offending node, fixup hashvals, |
| 978 | * check for a toosmall neighbor. |
| 979 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 980 | xfs_da3_node_remove(state, drop_blk); |
| 981 | xfs_da3_fixhashpath(state, &state->path); |
| 982 | error = xfs_da3_node_toosmall(state, &action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 984 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | if (action == 0) |
| 986 | return 0; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 987 | xfs_da3_node_unbalance(state, drop_blk, save_blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | break; |
| 989 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 990 | xfs_da3_fixhashpath(state, &state->altpath); |
| 991 | error = xfs_da3_blk_unlink(state, drop_blk, save_blk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | xfs_da_state_kill_altpath(state); |
| 993 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 994 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | error = xfs_da_shrink_inode(state->args, drop_blk->blkno, |
| 996 | drop_blk->bp); |
| 997 | drop_blk->bp = NULL; |
| 998 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 999 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | } |
| 1001 | /* |
| 1002 | * We joined all the way to the top. If it turns out that |
| 1003 | * we only have one entry in the root, make the child block |
| 1004 | * the new root. |
| 1005 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1006 | xfs_da3_node_remove(state, drop_blk); |
| 1007 | xfs_da3_fixhashpath(state, &state->path); |
| 1008 | error = xfs_da3_root_join(state, &state->path.blk[0]); |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1009 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | } |
| 1011 | |
Alex Elder | 1c4f332 | 2011-07-18 18:14:09 +0000 | [diff] [blame] | 1012 | #ifdef DEBUG |
| 1013 | static void |
| 1014 | xfs_da_blkinfo_onlychild_validate(struct xfs_da_blkinfo *blkinfo, __u16 level) |
| 1015 | { |
| 1016 | __be16 magic = blkinfo->magic; |
| 1017 | |
| 1018 | if (level == 1) { |
| 1019 | ASSERT(magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) || |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1020 | magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC) || |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1021 | magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC) || |
| 1022 | magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1023 | } else { |
| 1024 | ASSERT(magic == cpu_to_be16(XFS_DA_NODE_MAGIC) || |
| 1025 | magic == cpu_to_be16(XFS_DA3_NODE_MAGIC)); |
| 1026 | } |
Alex Elder | 1c4f332 | 2011-07-18 18:14:09 +0000 | [diff] [blame] | 1027 | ASSERT(!blkinfo->forw); |
| 1028 | ASSERT(!blkinfo->back); |
| 1029 | } |
| 1030 | #else /* !DEBUG */ |
| 1031 | #define xfs_da_blkinfo_onlychild_validate(blkinfo, level) |
| 1032 | #endif /* !DEBUG */ |
| 1033 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | /* |
| 1035 | * We have only one entry in the root. Copy the only remaining child of |
| 1036 | * the old root to block 0 as the new root node. |
| 1037 | */ |
| 1038 | STATIC int |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1039 | xfs_da3_root_join( |
| 1040 | struct xfs_da_state *state, |
| 1041 | struct xfs_da_state_blk *root_blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1043 | struct xfs_da_intnode *oldroot; |
| 1044 | struct xfs_da_args *args; |
| 1045 | xfs_dablk_t child; |
| 1046 | struct xfs_buf *bp; |
| 1047 | struct xfs_da3_icnode_hdr oldroothdr; |
| 1048 | struct xfs_da_node_entry *btree; |
| 1049 | int error; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1050 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1052 | trace_xfs_da_root_join(state->args); |
| 1053 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | ASSERT(root_blk->magic == XFS_DA_NODE_MAGIC); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1055 | |
| 1056 | args = state->args; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1057 | oldroot = root_blk->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1058 | dp->d_ops->node_hdr_from_disk(&oldroothdr, oldroot); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1059 | ASSERT(oldroothdr.forw == 0); |
| 1060 | ASSERT(oldroothdr.back == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
| 1062 | /* |
| 1063 | * If the root has more than one child, then don't do anything. |
| 1064 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1065 | if (oldroothdr.count > 1) |
| 1066 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
| 1068 | /* |
| 1069 | * Read in the (only) child block, then copy those bytes into |
| 1070 | * the root block's buffer and free the original child block. |
| 1071 | */ |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1072 | btree = dp->d_ops->node_tree_p(oldroot); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1073 | child = be32_to_cpu(btree[0].before); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | ASSERT(child != 0); |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1075 | error = xfs_da3_node_read(args->trans, dp, child, -1, &bp, |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 1076 | args->whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | if (error) |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1078 | return error; |
| 1079 | xfs_da_blkinfo_onlychild_validate(bp->b_addr, oldroothdr.level); |
Alex Elder | 1c4f332 | 2011-07-18 18:14:09 +0000 | [diff] [blame] | 1080 | |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 1081 | /* |
| 1082 | * This could be copying a leaf back into the root block in the case of |
| 1083 | * there only being a single leaf block left in the tree. Hence we have |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 1084 | * to update the b_ops pointer as well to match the buffer type change |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1085 | * that could occur. For dir3 blocks we also need to update the block |
| 1086 | * number in the buffer header. |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 1087 | */ |
Dave Chinner | b2a21e7 | 2014-06-06 15:22:04 +1000 | [diff] [blame] | 1088 | memcpy(root_blk->bp->b_addr, bp->b_addr, args->geo->blksize); |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 1089 | root_blk->bp->b_ops = bp->b_ops; |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 1090 | xfs_trans_buf_copy_type(root_blk->bp, bp); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1091 | if (oldroothdr.magic == XFS_DA3_NODE_MAGIC) { |
| 1092 | struct xfs_da3_blkinfo *da3 = root_blk->bp->b_addr; |
| 1093 | da3->blkno = cpu_to_be64(root_blk->bp->b_bn); |
| 1094 | } |
Dave Chinner | b2a21e7 | 2014-06-06 15:22:04 +1000 | [diff] [blame] | 1095 | xfs_trans_log_buf(args->trans, root_blk->bp, 0, |
| 1096 | args->geo->blksize - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | error = xfs_da_shrink_inode(args, child, bp); |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1098 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | } |
| 1100 | |
| 1101 | /* |
| 1102 | * Check a node block and its neighbors to see if the block should be |
| 1103 | * collapsed into one or the other neighbor. Always keep the block |
| 1104 | * with the smaller block number. |
| 1105 | * If the current block is over 50% full, don't try to join it, return 0. |
| 1106 | * If the block is empty, fill in the state structure and return 2. |
| 1107 | * If it can be collapsed, fill in the state structure and return 1. |
| 1108 | * If nothing can be done, return 0. |
| 1109 | */ |
| 1110 | STATIC int |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1111 | xfs_da3_node_toosmall( |
| 1112 | struct xfs_da_state *state, |
| 1113 | int *action) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1115 | struct xfs_da_intnode *node; |
| 1116 | struct xfs_da_state_blk *blk; |
| 1117 | struct xfs_da_blkinfo *info; |
| 1118 | xfs_dablk_t blkno; |
| 1119 | struct xfs_buf *bp; |
| 1120 | struct xfs_da3_icnode_hdr nodehdr; |
| 1121 | int count; |
| 1122 | int forward; |
| 1123 | int error; |
| 1124 | int retval; |
| 1125 | int i; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1126 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1128 | trace_xfs_da_node_toosmall(state->args); |
| 1129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | /* |
| 1131 | * Check for the degenerate case of the block being over 50% full. |
| 1132 | * If so, it's not worth even looking to see if we might be able |
| 1133 | * to coalesce with a sibling. |
| 1134 | */ |
| 1135 | blk = &state->path.blk[ state->path.active-1 ]; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1136 | info = blk->bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | node = (xfs_da_intnode_t *)info; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1138 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | b2a21e7 | 2014-06-06 15:22:04 +1000 | [diff] [blame] | 1139 | if (nodehdr.count > (state->args->geo->node_ents >> 1)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | *action = 0; /* blk over 50%, don't try to join */ |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1141 | return 0; /* blk over 50%, don't try to join */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | } |
| 1143 | |
| 1144 | /* |
| 1145 | * Check for the degenerate case of the block being empty. |
| 1146 | * 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] | 1147 | * coalesce it with a sibling block. We choose (arbitrarily) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | * to merge with the forward block unless it is NULL. |
| 1149 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1150 | if (nodehdr.count == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | /* |
| 1152 | * Make altpath point to the block we want to keep and |
| 1153 | * path point to the block we want to drop (this one). |
| 1154 | */ |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1155 | forward = (info->forw != 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | memcpy(&state->altpath, &state->path, sizeof(state->path)); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1157 | error = xfs_da3_path_shift(state, &state->altpath, forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | 0, &retval); |
| 1159 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1160 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | if (retval) { |
| 1162 | *action = 0; |
| 1163 | } else { |
| 1164 | *action = 2; |
| 1165 | } |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1166 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | } |
| 1168 | |
| 1169 | /* |
| 1170 | * Examine each sibling block to see if we can coalesce with |
| 1171 | * at least 25% free space to spare. We need to figure out |
| 1172 | * whether to merge with the forward or the backward block. |
| 1173 | * We prefer coalescing with the lower numbered sibling so as |
| 1174 | * to shrink a directory over time. |
| 1175 | */ |
Dave Chinner | b2a21e7 | 2014-06-06 15:22:04 +1000 | [diff] [blame] | 1176 | count = state->args->geo->node_ents; |
| 1177 | count -= state->args->geo->node_ents >> 2; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1178 | count -= nodehdr.count; |
| 1179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | /* start with smaller blk num */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1181 | forward = nodehdr.forw < nodehdr.back; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | for (i = 0; i < 2; forward = !forward, i++) { |
Mark Tinguely | 997def2 | 2013-09-23 12:18:58 -0500 | [diff] [blame] | 1183 | struct xfs_da3_icnode_hdr thdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | if (forward) |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1185 | blkno = nodehdr.forw; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | else |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1187 | blkno = nodehdr.back; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | if (blkno == 0) |
| 1189 | continue; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1190 | error = xfs_da3_node_read(state->args->trans, dp, |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 1191 | blkno, -1, &bp, state->args->whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1193 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1195 | node = bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1196 | dp->d_ops->node_hdr_from_disk(&thdr, node); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1197 | xfs_trans_brelse(state->args->trans, bp); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1198 | |
Mark Tinguely | 997def2 | 2013-09-23 12:18:58 -0500 | [diff] [blame] | 1199 | if (count - thdr.count >= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | break; /* fits with at least 25% to spare */ |
| 1201 | } |
| 1202 | if (i >= 2) { |
| 1203 | *action = 0; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1204 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | } |
| 1206 | |
| 1207 | /* |
| 1208 | * Make altpath point to the block we want to keep (the lower |
| 1209 | * numbered block) and path point to the block we want to drop. |
| 1210 | */ |
| 1211 | memcpy(&state->altpath, &state->path, sizeof(state->path)); |
| 1212 | if (blkno < blk->blkno) { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1213 | error = xfs_da3_path_shift(state, &state->altpath, forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | 0, &retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | } else { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1216 | error = xfs_da3_path_shift(state, &state->path, forward, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1217 | 0, &retval); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1218 | } |
| 1219 | if (error) |
| 1220 | return error; |
| 1221 | if (retval) { |
| 1222 | *action = 0; |
| 1223 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | } |
| 1225 | *action = 1; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1226 | return 0; |
| 1227 | } |
| 1228 | |
| 1229 | /* |
| 1230 | * Pick up the last hashvalue from an intermediate node. |
| 1231 | */ |
| 1232 | STATIC uint |
| 1233 | xfs_da3_node_lasthash( |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1234 | struct xfs_inode *dp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1235 | struct xfs_buf *bp, |
| 1236 | int *count) |
| 1237 | { |
| 1238 | struct xfs_da_intnode *node; |
| 1239 | struct xfs_da_node_entry *btree; |
| 1240 | struct xfs_da3_icnode_hdr nodehdr; |
| 1241 | |
| 1242 | node = bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1243 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1244 | if (count) |
| 1245 | *count = nodehdr.count; |
| 1246 | if (!nodehdr.count) |
| 1247 | return 0; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1248 | btree = dp->d_ops->node_tree_p(node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1249 | return be32_to_cpu(btree[nodehdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | } |
| 1251 | |
| 1252 | /* |
| 1253 | * Walk back up the tree adjusting hash values as necessary, |
| 1254 | * when we stop making changes, return. |
| 1255 | */ |
| 1256 | void |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1257 | xfs_da3_fixhashpath( |
| 1258 | struct xfs_da_state *state, |
| 1259 | struct xfs_da_state_path *path) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1261 | struct xfs_da_state_blk *blk; |
| 1262 | struct xfs_da_intnode *node; |
| 1263 | struct xfs_da_node_entry *btree; |
| 1264 | xfs_dahash_t lasthash=0; |
| 1265 | int level; |
| 1266 | int count; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1267 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1269 | trace_xfs_da_fixhashpath(state->args); |
| 1270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | level = path->active-1; |
| 1272 | blk = &path->blk[ level ]; |
| 1273 | switch (blk->magic) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | case XFS_ATTR_LEAF_MAGIC: |
| 1275 | lasthash = xfs_attr_leaf_lasthash(blk->bp, &count); |
| 1276 | if (count == 0) |
| 1277 | return; |
| 1278 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | case XFS_DIR2_LEAFN_MAGIC: |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1280 | lasthash = xfs_dir2_leafn_lasthash(dp, blk->bp, &count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | if (count == 0) |
| 1282 | return; |
| 1283 | break; |
| 1284 | case XFS_DA_NODE_MAGIC: |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1285 | lasthash = xfs_da3_node_lasthash(dp, blk->bp, &count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | if (count == 0) |
| 1287 | return; |
| 1288 | break; |
| 1289 | } |
| 1290 | for (blk--, level--; level >= 0; blk--, level--) { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1291 | struct xfs_da3_icnode_hdr nodehdr; |
| 1292 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1293 | node = blk->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1294 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1295 | btree = dp->d_ops->node_tree_p(node); |
Mark Tinguely | c88547a | 2014-04-04 07:10:49 +1100 | [diff] [blame] | 1296 | if (be32_to_cpu(btree[blk->index].hashval) == lasthash) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | break; |
| 1298 | blk->hashval = lasthash; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1299 | btree[blk->index].hashval = cpu_to_be32(lasthash); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1300 | xfs_trans_log_buf(state->args->trans, blk->bp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1301 | XFS_DA_LOGRANGE(node, &btree[blk->index], |
| 1302 | sizeof(*btree))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1304 | lasthash = be32_to_cpu(btree[nodehdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | } |
| 1306 | } |
| 1307 | |
| 1308 | /* |
| 1309 | * Remove an entry from an intermediate node. |
| 1310 | */ |
| 1311 | STATIC void |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1312 | xfs_da3_node_remove( |
| 1313 | struct xfs_da_state *state, |
| 1314 | struct xfs_da_state_blk *drop_blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1316 | struct xfs_da_intnode *node; |
| 1317 | struct xfs_da3_icnode_hdr nodehdr; |
| 1318 | struct xfs_da_node_entry *btree; |
| 1319 | int index; |
| 1320 | int tmp; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1321 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1323 | trace_xfs_da_node_remove(state->args); |
| 1324 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1325 | node = drop_blk->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1326 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1327 | ASSERT(drop_blk->index < nodehdr.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | ASSERT(drop_blk->index >= 0); |
| 1329 | |
| 1330 | /* |
| 1331 | * Copy over the offending entry, or just zero it out. |
| 1332 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1333 | index = drop_blk->index; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1334 | btree = dp->d_ops->node_tree_p(node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1335 | if (index < nodehdr.count - 1) { |
| 1336 | tmp = nodehdr.count - index - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | tmp *= (uint)sizeof(xfs_da_node_entry_t); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1338 | memmove(&btree[index], &btree[index + 1], tmp); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1339 | xfs_trans_log_buf(state->args->trans, drop_blk->bp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1340 | XFS_DA_LOGRANGE(node, &btree[index], tmp)); |
| 1341 | index = nodehdr.count - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1343 | memset(&btree[index], 0, sizeof(xfs_da_node_entry_t)); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1344 | xfs_trans_log_buf(state->args->trans, drop_blk->bp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1345 | XFS_DA_LOGRANGE(node, &btree[index], sizeof(btree[index]))); |
| 1346 | nodehdr.count -= 1; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1347 | dp->d_ops->node_hdr_to_disk(node, &nodehdr); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1348 | xfs_trans_log_buf(state->args->trans, drop_blk->bp, |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 1349 | XFS_DA_LOGRANGE(node, &node->hdr, dp->d_ops->node_hdr_size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | |
| 1351 | /* |
| 1352 | * Copy the last hash value from the block to propagate upwards. |
| 1353 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1354 | drop_blk->hashval = be32_to_cpu(btree[index - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | } |
| 1356 | |
| 1357 | /* |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1358 | * Unbalance the elements between two intermediate nodes, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | * move all Btree elements from one node into another. |
| 1360 | */ |
| 1361 | STATIC void |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1362 | xfs_da3_node_unbalance( |
| 1363 | struct xfs_da_state *state, |
| 1364 | struct xfs_da_state_blk *drop_blk, |
| 1365 | struct xfs_da_state_blk *save_blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1367 | struct xfs_da_intnode *drop_node; |
| 1368 | struct xfs_da_intnode *save_node; |
| 1369 | struct xfs_da_node_entry *drop_btree; |
| 1370 | struct xfs_da_node_entry *save_btree; |
| 1371 | struct xfs_da3_icnode_hdr drop_hdr; |
| 1372 | struct xfs_da3_icnode_hdr save_hdr; |
| 1373 | struct xfs_trans *tp; |
| 1374 | int sindex; |
| 1375 | int tmp; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1376 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1378 | trace_xfs_da_node_unbalance(state->args); |
| 1379 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1380 | drop_node = drop_blk->bp->b_addr; |
| 1381 | save_node = save_blk->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1382 | dp->d_ops->node_hdr_from_disk(&drop_hdr, drop_node); |
| 1383 | dp->d_ops->node_hdr_from_disk(&save_hdr, save_node); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1384 | drop_btree = dp->d_ops->node_tree_p(drop_node); |
| 1385 | save_btree = dp->d_ops->node_tree_p(save_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | tp = state->args->trans; |
| 1387 | |
| 1388 | /* |
| 1389 | * If the dying block has lower hashvals, then move all the |
| 1390 | * elements in the remaining block up to make a hole. |
| 1391 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1392 | if ((be32_to_cpu(drop_btree[0].hashval) < |
| 1393 | be32_to_cpu(save_btree[0].hashval)) || |
| 1394 | (be32_to_cpu(drop_btree[drop_hdr.count - 1].hashval) < |
| 1395 | be32_to_cpu(save_btree[save_hdr.count - 1].hashval))) { |
| 1396 | /* XXX: check this - is memmove dst correct? */ |
| 1397 | tmp = save_hdr.count * sizeof(xfs_da_node_entry_t); |
| 1398 | memmove(&save_btree[drop_hdr.count], &save_btree[0], tmp); |
| 1399 | |
| 1400 | sindex = 0; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1401 | xfs_trans_log_buf(tp, save_blk->bp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1402 | XFS_DA_LOGRANGE(save_node, &save_btree[0], |
| 1403 | (save_hdr.count + drop_hdr.count) * |
| 1404 | sizeof(xfs_da_node_entry_t))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | } else { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1406 | sindex = save_hdr.count; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1407 | xfs_trans_log_buf(tp, save_blk->bp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1408 | XFS_DA_LOGRANGE(save_node, &save_btree[sindex], |
| 1409 | drop_hdr.count * sizeof(xfs_da_node_entry_t))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | } |
| 1411 | |
| 1412 | /* |
| 1413 | * Move all the B-tree elements from drop_blk to save_blk. |
| 1414 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1415 | tmp = drop_hdr.count * (uint)sizeof(xfs_da_node_entry_t); |
| 1416 | memcpy(&save_btree[sindex], &drop_btree[0], tmp); |
| 1417 | save_hdr.count += drop_hdr.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1419 | dp->d_ops->node_hdr_to_disk(save_node, &save_hdr); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1420 | xfs_trans_log_buf(tp, save_blk->bp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | XFS_DA_LOGRANGE(save_node, &save_node->hdr, |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 1422 | dp->d_ops->node_hdr_size)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | |
| 1424 | /* |
| 1425 | * Save the last hashval in the remaining block for upward propagation. |
| 1426 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1427 | save_blk->hashval = be32_to_cpu(save_btree[save_hdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | } |
| 1429 | |
| 1430 | /*======================================================================== |
| 1431 | * Routines used for finding things in the Btree. |
| 1432 | *========================================================================*/ |
| 1433 | |
| 1434 | /* |
| 1435 | * Walk down the Btree looking for a particular filename, filling |
| 1436 | * in the state structure as we go. |
| 1437 | * |
| 1438 | * We will set the state structure to point to each of the elements |
| 1439 | * in each of the nodes where either the hashval is or should be. |
| 1440 | * |
| 1441 | * We support duplicate hashval's so for each entry in the current |
| 1442 | * node that could contain the desired hashval, descend. This is a |
| 1443 | * pruned depth-first tree search. |
| 1444 | */ |
| 1445 | int /* error */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1446 | xfs_da3_node_lookup_int( |
| 1447 | struct xfs_da_state *state, |
| 1448 | int *result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1450 | struct xfs_da_state_blk *blk; |
| 1451 | struct xfs_da_blkinfo *curr; |
| 1452 | struct xfs_da_intnode *node; |
| 1453 | struct xfs_da_node_entry *btree; |
| 1454 | struct xfs_da3_icnode_hdr nodehdr; |
| 1455 | struct xfs_da_args *args; |
| 1456 | xfs_dablk_t blkno; |
| 1457 | xfs_dahash_t hashval; |
| 1458 | xfs_dahash_t btreehashval; |
| 1459 | int probe; |
| 1460 | int span; |
| 1461 | int max; |
| 1462 | int error; |
| 1463 | int retval; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1464 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | |
| 1466 | args = state->args; |
| 1467 | |
| 1468 | /* |
| 1469 | * Descend thru the B-tree searching each level for the right |
| 1470 | * node to use, until the right hashval is found. |
| 1471 | */ |
Dave Chinner | 7dda6e8 | 2014-06-06 15:11:18 +1000 | [diff] [blame] | 1472 | blkno = (args->whichfork == XFS_DATA_FORK)? args->geo->leafblk : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | for (blk = &state->path.blk[0], state->path.active = 1; |
| 1474 | state->path.active <= XFS_DA_NODE_MAXDEPTH; |
| 1475 | blk++, state->path.active++) { |
| 1476 | /* |
| 1477 | * Read the next node down in the tree. |
| 1478 | */ |
| 1479 | blk->blkno = blkno; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1480 | error = xfs_da3_node_read(args->trans, args->dp, blkno, |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 1481 | -1, &blk->bp, args->whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | if (error) { |
| 1483 | blk->blkno = 0; |
| 1484 | state->path.active--; |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1485 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | } |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1487 | curr = blk->bp->b_addr; |
Nathan Scott | d432c80 | 2006-09-28 11:03:44 +1000 | [diff] [blame] | 1488 | blk->magic = be16_to_cpu(curr->magic); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1489 | |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1490 | if (blk->magic == XFS_ATTR_LEAF_MAGIC || |
| 1491 | blk->magic == XFS_ATTR3_LEAF_MAGIC) { |
| 1492 | blk->magic = XFS_ATTR_LEAF_MAGIC; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1493 | blk->hashval = xfs_attr_leaf_lasthash(blk->bp, NULL); |
| 1494 | break; |
| 1495 | } |
| 1496 | |
| 1497 | if (blk->magic == XFS_DIR2_LEAFN_MAGIC || |
| 1498 | blk->magic == XFS_DIR3_LEAFN_MAGIC) { |
| 1499 | blk->magic = XFS_DIR2_LEAFN_MAGIC; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1500 | blk->hashval = xfs_dir2_leafn_lasthash(args->dp, |
| 1501 | blk->bp, NULL); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1502 | break; |
| 1503 | } |
| 1504 | |
| 1505 | blk->magic = XFS_DA_NODE_MAGIC; |
| 1506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | |
| 1508 | /* |
| 1509 | * Search an intermediate node for a match. |
| 1510 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1511 | node = blk->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1512 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1513 | btree = dp->d_ops->node_tree_p(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1515 | max = nodehdr.count; |
| 1516 | blk->hashval = be32_to_cpu(btree[max - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1518 | /* |
| 1519 | * Binary search. (note: small blocks will skip loop) |
| 1520 | */ |
| 1521 | probe = span = max / 2; |
| 1522 | hashval = args->hashval; |
| 1523 | while (span > 4) { |
| 1524 | span /= 2; |
| 1525 | btreehashval = be32_to_cpu(btree[probe].hashval); |
| 1526 | if (btreehashval < hashval) |
| 1527 | probe += span; |
| 1528 | else if (btreehashval > hashval) |
| 1529 | probe -= span; |
| 1530 | else |
| 1531 | break; |
| 1532 | } |
| 1533 | ASSERT((probe >= 0) && (probe < max)); |
| 1534 | ASSERT((span <= 4) || |
| 1535 | (be32_to_cpu(btree[probe].hashval) == hashval)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1537 | /* |
| 1538 | * Since we may have duplicate hashval's, find the first |
| 1539 | * matching hashval in the node. |
| 1540 | */ |
| 1541 | while (probe > 0 && |
| 1542 | be32_to_cpu(btree[probe].hashval) >= hashval) { |
| 1543 | probe--; |
| 1544 | } |
| 1545 | while (probe < max && |
| 1546 | be32_to_cpu(btree[probe].hashval) < hashval) { |
| 1547 | probe++; |
| 1548 | } |
| 1549 | |
| 1550 | /* |
| 1551 | * Pick the right block to descend on. |
| 1552 | */ |
| 1553 | if (probe == max) { |
| 1554 | blk->index = max - 1; |
| 1555 | blkno = be32_to_cpu(btree[max - 1].before); |
| 1556 | } else { |
| 1557 | blk->index = probe; |
| 1558 | blkno = be32_to_cpu(btree[probe].before); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | } |
| 1560 | } |
| 1561 | |
| 1562 | /* |
| 1563 | * A leaf block that ends in the hashval that we are interested in |
| 1564 | * (final hashval == search hashval) means that the next block may |
| 1565 | * contain more entries with the same hashval, shift upward to the |
| 1566 | * next leaf and keep searching. |
| 1567 | */ |
| 1568 | for (;;) { |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 1569 | if (blk->magic == XFS_DIR2_LEAFN_MAGIC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | retval = xfs_dir2_leafn_lookup_int(blk->bp, args, |
| 1571 | &blk->index, state); |
Nathan Scott | d432c80 | 2006-09-28 11:03:44 +1000 | [diff] [blame] | 1572 | } else if (blk->magic == XFS_ATTR_LEAF_MAGIC) { |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1573 | retval = xfs_attr3_leaf_lookup_int(blk->bp, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | blk->index = args->index; |
| 1575 | args->blkno = blk->blkno; |
Nathan Scott | d432c80 | 2006-09-28 11:03:44 +1000 | [diff] [blame] | 1576 | } else { |
| 1577 | ASSERT(0); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1578 | return -EFSCORRUPTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | } |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1580 | if (((retval == -ENOENT) || (retval == -ENOATTR)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | (blk->hashval == args->hashval)) { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1582 | error = xfs_da3_path_shift(state, &state->path, 1, 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | &retval); |
| 1584 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1585 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | if (retval == 0) { |
| 1587 | continue; |
Nathan Scott | d432c80 | 2006-09-28 11:03:44 +1000 | [diff] [blame] | 1588 | } else if (blk->magic == XFS_ATTR_LEAF_MAGIC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | /* path_shift() gives ENOENT */ |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1590 | retval = -ENOATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | } |
| 1593 | break; |
| 1594 | } |
| 1595 | *result = retval; |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1596 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | } |
| 1598 | |
| 1599 | /*======================================================================== |
| 1600 | * Utility routines. |
| 1601 | *========================================================================*/ |
| 1602 | |
| 1603 | /* |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1604 | * Compare two intermediate nodes for "order". |
| 1605 | */ |
| 1606 | STATIC int |
| 1607 | xfs_da3_node_order( |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1608 | struct xfs_inode *dp, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1609 | struct xfs_buf *node1_bp, |
| 1610 | struct xfs_buf *node2_bp) |
| 1611 | { |
| 1612 | struct xfs_da_intnode *node1; |
| 1613 | struct xfs_da_intnode *node2; |
| 1614 | struct xfs_da_node_entry *btree1; |
| 1615 | struct xfs_da_node_entry *btree2; |
| 1616 | struct xfs_da3_icnode_hdr node1hdr; |
| 1617 | struct xfs_da3_icnode_hdr node2hdr; |
| 1618 | |
| 1619 | node1 = node1_bp->b_addr; |
| 1620 | node2 = node2_bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1621 | dp->d_ops->node_hdr_from_disk(&node1hdr, node1); |
| 1622 | dp->d_ops->node_hdr_from_disk(&node2hdr, node2); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1623 | btree1 = dp->d_ops->node_tree_p(node1); |
| 1624 | btree2 = dp->d_ops->node_tree_p(node2); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1625 | |
| 1626 | if (node1hdr.count > 0 && node2hdr.count > 0 && |
| 1627 | ((be32_to_cpu(btree2[0].hashval) < be32_to_cpu(btree1[0].hashval)) || |
| 1628 | (be32_to_cpu(btree2[node2hdr.count - 1].hashval) < |
| 1629 | be32_to_cpu(btree1[node1hdr.count - 1].hashval)))) { |
| 1630 | return 1; |
| 1631 | } |
| 1632 | return 0; |
| 1633 | } |
| 1634 | |
| 1635 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | * Link a new block into a doubly linked list of blocks (of whatever type). |
| 1637 | */ |
| 1638 | int /* error */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1639 | xfs_da3_blk_link( |
| 1640 | struct xfs_da_state *state, |
| 1641 | struct xfs_da_state_blk *old_blk, |
| 1642 | struct xfs_da_state_blk *new_blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1644 | struct xfs_da_blkinfo *old_info; |
| 1645 | struct xfs_da_blkinfo *new_info; |
| 1646 | struct xfs_da_blkinfo *tmp_info; |
| 1647 | struct xfs_da_args *args; |
| 1648 | struct xfs_buf *bp; |
| 1649 | int before = 0; |
| 1650 | int error; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1651 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | |
| 1653 | /* |
| 1654 | * Set up environment. |
| 1655 | */ |
| 1656 | args = state->args; |
| 1657 | ASSERT(args != NULL); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1658 | old_info = old_blk->bp->b_addr; |
| 1659 | new_info = new_blk->bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | ASSERT(old_blk->magic == XFS_DA_NODE_MAGIC || |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 1661 | old_blk->magic == XFS_DIR2_LEAFN_MAGIC || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | old_blk->magic == XFS_ATTR_LEAF_MAGIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | |
| 1664 | switch (old_blk->magic) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | case XFS_ATTR_LEAF_MAGIC: |
| 1666 | before = xfs_attr_leaf_order(old_blk->bp, new_blk->bp); |
| 1667 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | case XFS_DIR2_LEAFN_MAGIC: |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1669 | before = xfs_dir2_leafn_order(dp, old_blk->bp, new_blk->bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | break; |
| 1671 | case XFS_DA_NODE_MAGIC: |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1672 | before = xfs_da3_node_order(dp, old_blk->bp, new_blk->bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | break; |
| 1674 | } |
| 1675 | |
| 1676 | /* |
| 1677 | * Link blocks in appropriate order. |
| 1678 | */ |
| 1679 | if (before) { |
| 1680 | /* |
| 1681 | * Link new block in before existing block. |
| 1682 | */ |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1683 | trace_xfs_da_link_before(args); |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1684 | new_info->forw = cpu_to_be32(old_blk->blkno); |
| 1685 | new_info->back = old_info->back; |
| 1686 | if (old_info->back) { |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1687 | error = xfs_da3_node_read(args->trans, dp, |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1688 | be32_to_cpu(old_info->back), |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 1689 | -1, &bp, args->whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1691 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | ASSERT(bp != NULL); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1693 | tmp_info = bp->b_addr; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1694 | ASSERT(tmp_info->magic == old_info->magic); |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1695 | ASSERT(be32_to_cpu(tmp_info->forw) == old_blk->blkno); |
| 1696 | tmp_info->forw = cpu_to_be32(new_blk->blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1697 | xfs_trans_log_buf(args->trans, bp, 0, sizeof(*tmp_info)-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | } |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1699 | old_info->back = cpu_to_be32(new_blk->blkno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | } else { |
| 1701 | /* |
| 1702 | * Link new block in after existing block. |
| 1703 | */ |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1704 | trace_xfs_da_link_after(args); |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1705 | new_info->forw = old_info->forw; |
| 1706 | new_info->back = cpu_to_be32(old_blk->blkno); |
| 1707 | if (old_info->forw) { |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1708 | error = xfs_da3_node_read(args->trans, dp, |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1709 | be32_to_cpu(old_info->forw), |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 1710 | -1, &bp, args->whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1712 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | ASSERT(bp != NULL); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1714 | tmp_info = bp->b_addr; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1715 | ASSERT(tmp_info->magic == old_info->magic); |
| 1716 | ASSERT(be32_to_cpu(tmp_info->back) == old_blk->blkno); |
| 1717 | tmp_info->back = cpu_to_be32(new_blk->blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1718 | xfs_trans_log_buf(args->trans, bp, 0, sizeof(*tmp_info)-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | } |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1720 | old_info->forw = cpu_to_be32(new_blk->blkno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | } |
| 1722 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1723 | xfs_trans_log_buf(args->trans, old_blk->bp, 0, sizeof(*tmp_info) - 1); |
| 1724 | xfs_trans_log_buf(args->trans, new_blk->bp, 0, sizeof(*tmp_info) - 1); |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1725 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | } |
| 1727 | |
| 1728 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | * Unlink a block from a doubly linked list of blocks. |
| 1730 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1731 | STATIC int /* error */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1732 | xfs_da3_blk_unlink( |
| 1733 | struct xfs_da_state *state, |
| 1734 | struct xfs_da_state_blk *drop_blk, |
| 1735 | struct xfs_da_state_blk *save_blk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1737 | struct xfs_da_blkinfo *drop_info; |
| 1738 | struct xfs_da_blkinfo *save_info; |
| 1739 | struct xfs_da_blkinfo *tmp_info; |
| 1740 | struct xfs_da_args *args; |
| 1741 | struct xfs_buf *bp; |
| 1742 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | |
| 1744 | /* |
| 1745 | * Set up environment. |
| 1746 | */ |
| 1747 | args = state->args; |
| 1748 | ASSERT(args != NULL); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1749 | save_info = save_blk->bp->b_addr; |
| 1750 | drop_info = drop_blk->bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | ASSERT(save_blk->magic == XFS_DA_NODE_MAGIC || |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 1752 | save_blk->magic == XFS_DIR2_LEAFN_MAGIC || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | save_blk->magic == XFS_ATTR_LEAF_MAGIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | ASSERT(save_blk->magic == drop_blk->magic); |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1755 | ASSERT((be32_to_cpu(save_info->forw) == drop_blk->blkno) || |
| 1756 | (be32_to_cpu(save_info->back) == drop_blk->blkno)); |
| 1757 | ASSERT((be32_to_cpu(drop_info->forw) == save_blk->blkno) || |
| 1758 | (be32_to_cpu(drop_info->back) == save_blk->blkno)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1759 | |
| 1760 | /* |
| 1761 | * Unlink the leaf block from the doubly linked chain of leaves. |
| 1762 | */ |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1763 | if (be32_to_cpu(save_info->back) == drop_blk->blkno) { |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1764 | trace_xfs_da_unlink_back(args); |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1765 | save_info->back = drop_info->back; |
| 1766 | if (drop_info->back) { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1767 | error = xfs_da3_node_read(args->trans, args->dp, |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1768 | be32_to_cpu(drop_info->back), |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 1769 | -1, &bp, args->whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1771 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | ASSERT(bp != NULL); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1773 | tmp_info = bp->b_addr; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1774 | ASSERT(tmp_info->magic == save_info->magic); |
| 1775 | ASSERT(be32_to_cpu(tmp_info->forw) == drop_blk->blkno); |
| 1776 | tmp_info->forw = cpu_to_be32(save_blk->blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1777 | xfs_trans_log_buf(args->trans, bp, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | sizeof(*tmp_info) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | } |
| 1780 | } else { |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 1781 | trace_xfs_da_unlink_forward(args); |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1782 | save_info->forw = drop_info->forw; |
| 1783 | if (drop_info->forw) { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1784 | error = xfs_da3_node_read(args->trans, args->dp, |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1785 | be32_to_cpu(drop_info->forw), |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 1786 | -1, &bp, args->whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1788 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | ASSERT(bp != NULL); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1790 | tmp_info = bp->b_addr; |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 1791 | ASSERT(tmp_info->magic == save_info->magic); |
| 1792 | ASSERT(be32_to_cpu(tmp_info->back) == drop_blk->blkno); |
| 1793 | tmp_info->back = cpu_to_be32(save_blk->blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1794 | xfs_trans_log_buf(args->trans, bp, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | sizeof(*tmp_info) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | } |
| 1797 | } |
| 1798 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1799 | xfs_trans_log_buf(args->trans, save_blk->bp, 0, sizeof(*save_info) - 1); |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1800 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | } |
| 1802 | |
| 1803 | /* |
| 1804 | * Move a path "forward" or "!forward" one block at the current level. |
| 1805 | * |
| 1806 | * This routine will adjust a "path" to point to the next block |
| 1807 | * "forward" (higher hashvalues) or "!forward" (lower hashvals) in the |
| 1808 | * Btree, including updating pointers to the intermediate nodes between |
| 1809 | * the new bottom and the root. |
| 1810 | */ |
| 1811 | int /* error */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1812 | xfs_da3_path_shift( |
| 1813 | struct xfs_da_state *state, |
| 1814 | struct xfs_da_state_path *path, |
| 1815 | int forward, |
| 1816 | int release, |
| 1817 | int *result) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1819 | struct xfs_da_state_blk *blk; |
| 1820 | struct xfs_da_blkinfo *info; |
| 1821 | struct xfs_da_intnode *node; |
| 1822 | struct xfs_da_args *args; |
| 1823 | struct xfs_da_node_entry *btree; |
| 1824 | struct xfs_da3_icnode_hdr nodehdr; |
| 1825 | xfs_dablk_t blkno = 0; |
| 1826 | int level; |
| 1827 | int error; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1828 | struct xfs_inode *dp = state->args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | |
Dave Chinner | ee73259 | 2012-11-12 22:53:53 +1100 | [diff] [blame] | 1830 | trace_xfs_da_path_shift(state->args); |
| 1831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | /* |
| 1833 | * Roll up the Btree looking for the first block where our |
| 1834 | * current index is not at the edge of the block. Note that |
| 1835 | * we skip the bottom layer because we want the sibling block. |
| 1836 | */ |
| 1837 | args = state->args; |
| 1838 | ASSERT(args != NULL); |
| 1839 | ASSERT(path != NULL); |
| 1840 | ASSERT((path->active > 0) && (path->active < XFS_DA_NODE_MAXDEPTH)); |
| 1841 | level = (path->active-1) - 1; /* skip bottom layer in path */ |
| 1842 | for (blk = &path->blk[level]; level >= 0; blk--, level--) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1843 | node = blk->bp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1844 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1845 | btree = dp->d_ops->node_tree_p(node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1846 | |
| 1847 | if (forward && (blk->index < nodehdr.count - 1)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | blk->index++; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1849 | blkno = be32_to_cpu(btree[blk->index].before); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | break; |
| 1851 | } else if (!forward && (blk->index > 0)) { |
| 1852 | blk->index--; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1853 | blkno = be32_to_cpu(btree[blk->index].before); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | break; |
| 1855 | } |
| 1856 | } |
| 1857 | if (level < 0) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1858 | *result = -ENOENT; /* we're out of our tree */ |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 1859 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1860 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | } |
| 1862 | |
| 1863 | /* |
| 1864 | * Roll down the edge of the subtree until we reach the |
| 1865 | * same depth we were at originally. |
| 1866 | */ |
| 1867 | for (blk++, level++; level < path->active; blk++, level++) { |
| 1868 | /* |
| 1869 | * Release the old block. |
| 1870 | * (if it's dirty, trans won't actually let go) |
| 1871 | */ |
| 1872 | if (release) |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1873 | xfs_trans_brelse(args->trans, blk->bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | |
| 1875 | /* |
| 1876 | * Read the next child block. |
| 1877 | */ |
| 1878 | blk->blkno = blkno; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1879 | error = xfs_da3_node_read(args->trans, dp, blkno, -1, |
Dave Chinner | d9392a4 | 2012-11-12 22:54:17 +1100 | [diff] [blame] | 1880 | &blk->bp, args->whichfork); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | if (error) |
Eric Sandeen | d99831f | 2014-06-22 15:03:54 +1000 | [diff] [blame] | 1882 | return error; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1883 | info = blk->bp->b_addr; |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1884 | ASSERT(info->magic == cpu_to_be16(XFS_DA_NODE_MAGIC) || |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1885 | info->magic == cpu_to_be16(XFS_DA3_NODE_MAGIC) || |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1886 | info->magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) || |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1887 | info->magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC) || |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1888 | info->magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC) || |
| 1889 | info->magic == cpu_to_be16(XFS_ATTR3_LEAF_MAGIC)); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1890 | |
| 1891 | |
| 1892 | /* |
| 1893 | * Note: we flatten the magic number to a single type so we |
| 1894 | * don't have to compare against crc/non-crc types elsewhere. |
| 1895 | */ |
| 1896 | switch (be16_to_cpu(info->magic)) { |
| 1897 | case XFS_DA_NODE_MAGIC: |
| 1898 | case XFS_DA3_NODE_MAGIC: |
| 1899 | blk->magic = XFS_DA_NODE_MAGIC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | node = (xfs_da_intnode_t *)info; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1901 | dp->d_ops->node_hdr_from_disk(&nodehdr, node); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1902 | btree = dp->d_ops->node_tree_p(node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1903 | blk->hashval = be32_to_cpu(btree[nodehdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | if (forward) |
| 1905 | blk->index = 0; |
| 1906 | else |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1907 | blk->index = nodehdr.count - 1; |
| 1908 | blkno = be32_to_cpu(btree[blk->index].before); |
| 1909 | break; |
| 1910 | case XFS_ATTR_LEAF_MAGIC: |
Dave Chinner | 517c222 | 2013-04-24 18:58:55 +1000 | [diff] [blame] | 1911 | case XFS_ATTR3_LEAF_MAGIC: |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1912 | blk->magic = XFS_ATTR_LEAF_MAGIC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | ASSERT(level == path->active-1); |
| 1914 | blk->index = 0; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1915 | blk->hashval = xfs_attr_leaf_lasthash(blk->bp, NULL); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1916 | break; |
| 1917 | case XFS_DIR2_LEAFN_MAGIC: |
| 1918 | case XFS_DIR3_LEAFN_MAGIC: |
| 1919 | blk->magic = XFS_DIR2_LEAFN_MAGIC; |
| 1920 | ASSERT(level == path->active-1); |
| 1921 | blk->index = 0; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1922 | blk->hashval = xfs_dir2_leafn_lasthash(args->dp, |
| 1923 | blk->bp, NULL); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1924 | break; |
| 1925 | default: |
| 1926 | ASSERT(0); |
| 1927 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | } |
| 1929 | } |
| 1930 | *result = 0; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 1931 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | } |
| 1933 | |
| 1934 | |
| 1935 | /*======================================================================== |
| 1936 | * Utility routines. |
| 1937 | *========================================================================*/ |
| 1938 | |
| 1939 | /* |
| 1940 | * Implement a simple hash on a character string. |
| 1941 | * Rotate the hash value by 7 bits, then XOR each character in. |
| 1942 | * This is implemented with some source-level loop unrolling. |
| 1943 | */ |
| 1944 | xfs_dahash_t |
Christoph Hellwig | a568778 | 2009-02-09 08:37:39 +0100 | [diff] [blame] | 1945 | xfs_da_hashname(const __uint8_t *name, int namelen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | { |
| 1947 | xfs_dahash_t hash; |
| 1948 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | /* |
| 1950 | * Do four characters at a time as long as we can. |
| 1951 | */ |
| 1952 | for (hash = 0; namelen >= 4; namelen -= 4, name += 4) |
| 1953 | hash = (name[0] << 21) ^ (name[1] << 14) ^ (name[2] << 7) ^ |
| 1954 | (name[3] << 0) ^ rol32(hash, 7 * 4); |
| 1955 | |
| 1956 | /* |
| 1957 | * Now do the rest of the characters. |
| 1958 | */ |
| 1959 | switch (namelen) { |
| 1960 | case 3: |
| 1961 | return (name[0] << 14) ^ (name[1] << 7) ^ (name[2] << 0) ^ |
| 1962 | rol32(hash, 7 * 3); |
| 1963 | case 2: |
| 1964 | return (name[0] << 7) ^ (name[1] << 0) ^ rol32(hash, 7 * 2); |
| 1965 | case 1: |
| 1966 | return (name[0] << 0) ^ rol32(hash, 7 * 1); |
Nathan Scott | 2b3b6d0 | 2005-11-02 15:12:28 +1100 | [diff] [blame] | 1967 | default: /* case 0: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | return hash; |
| 1969 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | } |
| 1971 | |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1972 | enum xfs_dacmp |
| 1973 | xfs_da_compname( |
| 1974 | struct xfs_da_args *args, |
Dave Chinner | 2bc7542 | 2010-01-20 10:47:17 +1100 | [diff] [blame] | 1975 | const unsigned char *name, |
| 1976 | int len) |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1977 | { |
| 1978 | return (args->namelen == len && memcmp(args->name, name, len) == 0) ? |
| 1979 | XFS_CMP_EXACT : XFS_CMP_DIFFERENT; |
| 1980 | } |
| 1981 | |
| 1982 | static xfs_dahash_t |
| 1983 | xfs_default_hashname( |
| 1984 | struct xfs_name *name) |
| 1985 | { |
| 1986 | return xfs_da_hashname(name->name, name->len); |
| 1987 | } |
| 1988 | |
| 1989 | const struct xfs_nameops xfs_default_nameops = { |
| 1990 | .hashname = xfs_default_hashname, |
| 1991 | .compname = xfs_da_compname |
| 1992 | }; |
| 1993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | int |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 1995 | xfs_da_grow_inode_int( |
| 1996 | struct xfs_da_args *args, |
| 1997 | xfs_fileoff_t *bno, |
| 1998 | int count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | { |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2000 | struct xfs_trans *tp = args->trans; |
| 2001 | struct xfs_inode *dp = args->dp; |
| 2002 | int w = args->whichfork; |
Christoph Hellwig | d5cf09b | 2014-07-30 09:12:05 +1000 | [diff] [blame] | 2003 | xfs_rfsblock_t nblks = dp->i_d.di_nblocks; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2004 | struct xfs_bmbt_irec map, *mapp; |
| 2005 | int nmap, error, got, i, mapi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | /* |
| 2008 | * Find a spot in the file space to put the new block. |
| 2009 | */ |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2010 | error = xfs_bmap_first_unused(tp, dp, count, bno, w); |
| 2011 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2012 | return error; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2013 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | /* |
| 2015 | * Try mapping it in one filesystem block. |
| 2016 | */ |
| 2017 | nmap = 1; |
| 2018 | ASSERT(args->firstblock != NULL); |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 2019 | error = xfs_bmapi_write(tp, dp, *bno, count, |
| 2020 | xfs_bmapi_aflag(w)|XFS_BMAPI_METADATA|XFS_BMAPI_CONTIG, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | args->firstblock, args->total, &map, &nmap, |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2022 | args->flist); |
| 2023 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | return error; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2025 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | ASSERT(nmap <= 1); |
| 2027 | if (nmap == 1) { |
| 2028 | mapp = ↦ |
| 2029 | mapi = 1; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2030 | } else if (nmap == 0 && count > 1) { |
| 2031 | xfs_fileoff_t b; |
| 2032 | int c; |
| 2033 | |
| 2034 | /* |
| 2035 | * If we didn't get it and the block might work if fragmented, |
| 2036 | * try without the CONTIG flag. Loop until we get it all. |
| 2037 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | mapp = kmem_alloc(sizeof(*mapp) * count, KM_SLEEP); |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2039 | for (b = *bno, mapi = 0; b < *bno + count; ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2040 | nmap = MIN(XFS_BMAP_MAX_NMAP, count); |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2041 | c = (int)(*bno + count - b); |
Dave Chinner | c0dc782 | 2011-09-18 20:40:52 +0000 | [diff] [blame] | 2042 | error = xfs_bmapi_write(tp, dp, b, c, |
| 2043 | xfs_bmapi_aflag(w)|XFS_BMAPI_METADATA, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2044 | args->firstblock, args->total, |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2045 | &mapp[mapi], &nmap, args->flist); |
| 2046 | if (error) |
| 2047 | goto out_free_map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | if (nmap < 1) |
| 2049 | break; |
| 2050 | mapi += nmap; |
| 2051 | b = mapp[mapi - 1].br_startoff + |
| 2052 | mapp[mapi - 1].br_blockcount; |
| 2053 | } |
| 2054 | } else { |
| 2055 | mapi = 0; |
| 2056 | mapp = NULL; |
| 2057 | } |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2058 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | /* |
| 2060 | * Count the blocks we got, make sure it matches the total. |
| 2061 | */ |
| 2062 | for (i = 0, got = 0; i < mapi; i++) |
| 2063 | got += mapp[i].br_blockcount; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2064 | if (got != count || mapp[0].br_startoff != *bno || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2065 | mapp[mapi - 1].br_startoff + mapp[mapi - 1].br_blockcount != |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2066 | *bno + count) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2067 | error = -ENOSPC; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2068 | goto out_free_map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | } |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2070 | |
David Chinner | a744405 | 2008-10-30 17:38:12 +1100 | [diff] [blame] | 2071 | /* account for newly allocated blocks in reserved blocks total */ |
| 2072 | args->total -= dp->i_d.di_nblocks - nblks; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2073 | |
| 2074 | out_free_map: |
| 2075 | if (mapp != &map) |
| 2076 | kmem_free(mapp); |
| 2077 | return error; |
| 2078 | } |
| 2079 | |
| 2080 | /* |
| 2081 | * Add a block to the btree ahead of the file. |
| 2082 | * Return the new block number to the caller. |
| 2083 | */ |
| 2084 | int |
| 2085 | xfs_da_grow_inode( |
| 2086 | struct xfs_da_args *args, |
| 2087 | xfs_dablk_t *new_blkno) |
| 2088 | { |
| 2089 | xfs_fileoff_t bno; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2090 | int error; |
| 2091 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 2092 | trace_xfs_da_grow_inode(args); |
| 2093 | |
Dave Chinner | d6cf130 | 2014-06-06 15:14:11 +1000 | [diff] [blame] | 2094 | bno = args->geo->leafblk; |
| 2095 | error = xfs_da_grow_inode_int(args, &bno, args->geo->fsbcount); |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 2096 | if (!error) |
| 2097 | *new_blkno = (xfs_dablk_t)bno; |
| 2098 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | } |
| 2100 | |
| 2101 | /* |
| 2102 | * Ick. We need to always be able to remove a btree block, even |
| 2103 | * if there's no space reservation because the filesystem is full. |
| 2104 | * This is called if xfs_bunmapi on a btree block fails due to ENOSPC. |
| 2105 | * It swaps the target block with the last block in the file. The |
| 2106 | * last block in the file can always be removed since it can't cause |
| 2107 | * a bmap btree split to do that. |
| 2108 | */ |
| 2109 | STATIC int |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2110 | xfs_da3_swap_lastblock( |
| 2111 | struct xfs_da_args *args, |
| 2112 | xfs_dablk_t *dead_blknop, |
| 2113 | struct xfs_buf **dead_bufp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2115 | struct xfs_da_blkinfo *dead_info; |
| 2116 | struct xfs_da_blkinfo *sib_info; |
| 2117 | struct xfs_da_intnode *par_node; |
| 2118 | struct xfs_da_intnode *dead_node; |
| 2119 | struct xfs_dir2_leaf *dead_leaf2; |
| 2120 | struct xfs_da_node_entry *btree; |
| 2121 | struct xfs_da3_icnode_hdr par_hdr; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2122 | struct xfs_inode *dp; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2123 | struct xfs_trans *tp; |
| 2124 | struct xfs_mount *mp; |
| 2125 | struct xfs_buf *dead_buf; |
| 2126 | struct xfs_buf *last_buf; |
| 2127 | struct xfs_buf *sib_buf; |
| 2128 | struct xfs_buf *par_buf; |
| 2129 | xfs_dahash_t dead_hash; |
| 2130 | xfs_fileoff_t lastoff; |
| 2131 | xfs_dablk_t dead_blkno; |
| 2132 | xfs_dablk_t last_blkno; |
| 2133 | xfs_dablk_t sib_blkno; |
| 2134 | xfs_dablk_t par_blkno; |
| 2135 | int error; |
| 2136 | int w; |
| 2137 | int entno; |
| 2138 | int level; |
| 2139 | int dead_level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 2141 | trace_xfs_da_swap_lastblock(args); |
| 2142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | dead_buf = *dead_bufp; |
| 2144 | dead_blkno = *dead_blknop; |
| 2145 | tp = args->trans; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2146 | dp = args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | w = args->whichfork; |
| 2148 | ASSERT(w == XFS_DATA_FORK); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2149 | mp = dp->i_mount; |
Dave Chinner | 7dda6e8 | 2014-06-06 15:11:18 +1000 | [diff] [blame] | 2150 | lastoff = args->geo->freeblk; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2151 | error = xfs_bmap_last_before(tp, dp, &lastoff, w); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2152 | if (error) |
| 2153 | return error; |
| 2154 | if (unlikely(lastoff == 0)) { |
| 2155 | XFS_ERROR_REPORT("xfs_da_swap_lastblock(1)", XFS_ERRLEVEL_LOW, |
| 2156 | mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2157 | return -EFSCORRUPTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | } |
| 2159 | /* |
| 2160 | * Read the last block in the btree space. |
| 2161 | */ |
Dave Chinner | d6cf130 | 2014-06-06 15:14:11 +1000 | [diff] [blame] | 2162 | last_blkno = (xfs_dablk_t)lastoff - args->geo->fsbcount; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2163 | error = xfs_da3_node_read(tp, dp, last_blkno, -1, &last_buf, w); |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 2164 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | return error; |
| 2166 | /* |
| 2167 | * Copy the last block into the dead buffer and log it. |
| 2168 | */ |
Dave Chinner | 8f66193 | 2014-06-06 15:15:59 +1000 | [diff] [blame] | 2169 | memcpy(dead_buf->b_addr, last_buf->b_addr, args->geo->blksize); |
| 2170 | xfs_trans_log_buf(tp, dead_buf, 0, args->geo->blksize - 1); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2171 | dead_info = dead_buf->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2172 | /* |
| 2173 | * Get values from the moved block. |
| 2174 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 2175 | if (dead_info->magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) || |
| 2176 | dead_info->magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)) { |
| 2177 | struct xfs_dir3_icleaf_hdr leafhdr; |
| 2178 | struct xfs_dir2_leaf_entry *ents; |
| 2179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | dead_leaf2 = (xfs_dir2_leaf_t *)dead_info; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 2181 | dp->d_ops->leaf_hdr_from_disk(&leafhdr, dead_leaf2); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2182 | ents = dp->d_ops->leaf_ents_p(dead_leaf2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | dead_level = 0; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 2184 | dead_hash = be32_to_cpu(ents[leafhdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | } else { |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2186 | struct xfs_da3_icnode_hdr deadhdr; |
| 2187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2188 | dead_node = (xfs_da_intnode_t *)dead_info; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 2189 | dp->d_ops->node_hdr_from_disk(&deadhdr, dead_node); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2190 | btree = dp->d_ops->node_tree_p(dead_node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2191 | dead_level = deadhdr.level; |
| 2192 | dead_hash = be32_to_cpu(btree[deadhdr.count - 1].hashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | } |
| 2194 | sib_buf = par_buf = NULL; |
| 2195 | /* |
| 2196 | * If the moved block has a left sibling, fix up the pointers. |
| 2197 | */ |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 2198 | if ((sib_blkno = be32_to_cpu(dead_info->back))) { |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2199 | error = xfs_da3_node_read(tp, dp, sib_blkno, -1, &sib_buf, w); |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 2200 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | goto done; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2202 | sib_info = sib_buf->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | if (unlikely( |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 2204 | be32_to_cpu(sib_info->forw) != last_blkno || |
| 2205 | sib_info->magic != dead_info->magic)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | XFS_ERROR_REPORT("xfs_da_swap_lastblock(2)", |
| 2207 | XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2208 | error = -EFSCORRUPTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2209 | goto done; |
| 2210 | } |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 2211 | sib_info->forw = cpu_to_be32(dead_blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2212 | xfs_trans_log_buf(tp, sib_buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2213 | XFS_DA_LOGRANGE(sib_info, &sib_info->forw, |
| 2214 | sizeof(sib_info->forw))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | sib_buf = NULL; |
| 2216 | } |
| 2217 | /* |
| 2218 | * If the moved block has a right sibling, fix up the pointers. |
| 2219 | */ |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 2220 | if ((sib_blkno = be32_to_cpu(dead_info->forw))) { |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2221 | error = xfs_da3_node_read(tp, dp, sib_blkno, -1, &sib_buf, w); |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 2222 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | goto done; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2224 | sib_info = sib_buf->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | if (unlikely( |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 2226 | be32_to_cpu(sib_info->back) != last_blkno || |
| 2227 | sib_info->magic != dead_info->magic)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | XFS_ERROR_REPORT("xfs_da_swap_lastblock(3)", |
| 2229 | XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2230 | error = -EFSCORRUPTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | goto done; |
| 2232 | } |
Nathan Scott | 89da054 | 2006-03-17 17:28:40 +1100 | [diff] [blame] | 2233 | sib_info->back = cpu_to_be32(dead_blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2234 | xfs_trans_log_buf(tp, sib_buf, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | XFS_DA_LOGRANGE(sib_info, &sib_info->back, |
| 2236 | sizeof(sib_info->back))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | sib_buf = NULL; |
| 2238 | } |
Dave Chinner | 7dda6e8 | 2014-06-06 15:11:18 +1000 | [diff] [blame] | 2239 | par_blkno = args->geo->leafblk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | level = -1; |
| 2241 | /* |
| 2242 | * Walk down the tree looking for the parent of the moved block. |
| 2243 | */ |
| 2244 | for (;;) { |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2245 | error = xfs_da3_node_read(tp, dp, par_blkno, -1, &par_buf, w); |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 2246 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2247 | goto done; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2248 | par_node = par_buf->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 2249 | dp->d_ops->node_hdr_from_disk(&par_hdr, par_node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2250 | if (level >= 0 && level != par_hdr.level + 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | XFS_ERROR_REPORT("xfs_da_swap_lastblock(4)", |
| 2252 | XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2253 | error = -EFSCORRUPTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | goto done; |
| 2255 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2256 | level = par_hdr.level; |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2257 | btree = dp->d_ops->node_tree_p(par_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | for (entno = 0; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2259 | entno < par_hdr.count && |
| 2260 | be32_to_cpu(btree[entno].hashval) < dead_hash; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2261 | entno++) |
| 2262 | continue; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2263 | if (entno == par_hdr.count) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | XFS_ERROR_REPORT("xfs_da_swap_lastblock(5)", |
| 2265 | XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2266 | error = -EFSCORRUPTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | goto done; |
| 2268 | } |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2269 | par_blkno = be32_to_cpu(btree[entno].before); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2270 | if (level == dead_level + 1) |
| 2271 | break; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2272 | xfs_trans_brelse(tp, par_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | par_buf = NULL; |
| 2274 | } |
| 2275 | /* |
| 2276 | * We're in the right parent block. |
| 2277 | * Look for the right entry. |
| 2278 | */ |
| 2279 | for (;;) { |
| 2280 | for (; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2281 | entno < par_hdr.count && |
| 2282 | be32_to_cpu(btree[entno].before) != last_blkno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | entno++) |
| 2284 | continue; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2285 | if (entno < par_hdr.count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | break; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2287 | par_blkno = par_hdr.forw; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2288 | xfs_trans_brelse(tp, par_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | par_buf = NULL; |
| 2290 | if (unlikely(par_blkno == 0)) { |
| 2291 | XFS_ERROR_REPORT("xfs_da_swap_lastblock(6)", |
| 2292 | XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2293 | error = -EFSCORRUPTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | goto done; |
| 2295 | } |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2296 | error = xfs_da3_node_read(tp, dp, par_blkno, -1, &par_buf, w); |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 2297 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | goto done; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2299 | par_node = par_buf->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 2300 | dp->d_ops->node_hdr_from_disk(&par_hdr, par_node); |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2301 | if (par_hdr.level != level) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2302 | XFS_ERROR_REPORT("xfs_da_swap_lastblock(7)", |
| 2303 | XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2304 | error = -EFSCORRUPTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | goto done; |
| 2306 | } |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 2307 | btree = dp->d_ops->node_tree_p(par_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | entno = 0; |
| 2309 | } |
| 2310 | /* |
| 2311 | * Update the parent entry pointing to the moved block. |
| 2312 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2313 | btree[entno].before = cpu_to_be32(dead_blkno); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2314 | xfs_trans_log_buf(tp, par_buf, |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2315 | XFS_DA_LOGRANGE(par_node, &btree[entno].before, |
| 2316 | sizeof(btree[entno].before))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2317 | *dead_blknop = last_blkno; |
| 2318 | *dead_bufp = last_buf; |
| 2319 | return 0; |
| 2320 | done: |
| 2321 | if (par_buf) |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2322 | xfs_trans_brelse(tp, par_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | if (sib_buf) |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2324 | xfs_trans_brelse(tp, sib_buf); |
| 2325 | xfs_trans_brelse(tp, last_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | return error; |
| 2327 | } |
| 2328 | |
| 2329 | /* |
| 2330 | * Remove a btree block from a directory or attribute. |
| 2331 | */ |
| 2332 | int |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2333 | xfs_da_shrink_inode( |
| 2334 | xfs_da_args_t *args, |
| 2335 | xfs_dablk_t dead_blkno, |
| 2336 | struct xfs_buf *dead_buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | { |
| 2338 | xfs_inode_t *dp; |
| 2339 | int done, error, w, count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | |
Dave Chinner | 5a5881c | 2012-03-22 05:15:13 +0000 | [diff] [blame] | 2342 | trace_xfs_da_shrink_inode(args); |
| 2343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2344 | dp = args->dp; |
| 2345 | w = args->whichfork; |
| 2346 | tp = args->trans; |
Dave Chinner | d6cf130 | 2014-06-06 15:14:11 +1000 | [diff] [blame] | 2347 | count = args->geo->fsbcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | for (;;) { |
| 2349 | /* |
| 2350 | * Remove extents. If we get ENOSPC for a dir we have to move |
| 2351 | * the last block to the place we want to kill. |
| 2352 | */ |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2353 | error = xfs_bunmapi(tp, dp, dead_blkno, count, |
| 2354 | xfs_bmapi_aflag(w)|XFS_BMAPI_METADATA, |
| 2355 | 0, args->firstblock, args->flist, &done); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2356 | if (error == -ENOSPC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | if (w != XFS_DATA_FORK) |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 2358 | break; |
Dave Chinner | f5ea110 | 2013-04-24 18:58:02 +1000 | [diff] [blame] | 2359 | error = xfs_da3_swap_lastblock(args, &dead_blkno, |
| 2360 | &dead_buf); |
| 2361 | if (error) |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 2362 | break; |
| 2363 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | } |
| 2366 | } |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2367 | xfs_trans_binval(tp, dead_buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2368 | return error; |
| 2369 | } |
| 2370 | |
| 2371 | /* |
| 2372 | * See if the mapping(s) for this btree block are valid, i.e. |
| 2373 | * don't contain holes, are logically contiguous, and cover the whole range. |
| 2374 | */ |
| 2375 | STATIC int |
| 2376 | xfs_da_map_covers_blocks( |
| 2377 | int nmap, |
| 2378 | xfs_bmbt_irec_t *mapp, |
| 2379 | xfs_dablk_t bno, |
| 2380 | int count) |
| 2381 | { |
| 2382 | int i; |
| 2383 | xfs_fileoff_t off; |
| 2384 | |
| 2385 | for (i = 0, off = bno; i < nmap; i++) { |
| 2386 | if (mapp[i].br_startblock == HOLESTARTBLOCK || |
| 2387 | mapp[i].br_startblock == DELAYSTARTBLOCK) { |
| 2388 | return 0; |
| 2389 | } |
| 2390 | if (off != mapp[i].br_startoff) { |
| 2391 | return 0; |
| 2392 | } |
| 2393 | off += mapp[i].br_blockcount; |
| 2394 | } |
| 2395 | return off == bno + count; |
| 2396 | } |
| 2397 | |
| 2398 | /* |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2399 | * Convert a struct xfs_bmbt_irec to a struct xfs_buf_map. |
| 2400 | * |
| 2401 | * For the single map case, it is assumed that the caller has provided a pointer |
| 2402 | * to a valid xfs_buf_map. For the multiple map case, this function will |
| 2403 | * allocate the xfs_buf_map to hold all the maps and replace the caller's single |
| 2404 | * map pointer with the allocated map. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | */ |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2406 | static int |
| 2407 | xfs_buf_map_from_irec( |
| 2408 | struct xfs_mount *mp, |
| 2409 | struct xfs_buf_map **mapp, |
Dave Chinner | 836a94a | 2013-08-12 20:49:44 +1000 | [diff] [blame] | 2410 | int *nmaps, |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2411 | struct xfs_bmbt_irec *irecs, |
Dave Chinner | 836a94a | 2013-08-12 20:49:44 +1000 | [diff] [blame] | 2412 | int nirecs) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2413 | { |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2414 | struct xfs_buf_map *map; |
| 2415 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2417 | ASSERT(*nmaps == 1); |
| 2418 | ASSERT(nirecs >= 1); |
| 2419 | |
| 2420 | if (nirecs > 1) { |
Dave Chinner | b17cb36 | 2013-05-20 09:51:12 +1000 | [diff] [blame] | 2421 | map = kmem_zalloc(nirecs * sizeof(struct xfs_buf_map), |
| 2422 | KM_SLEEP | KM_NOFS); |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2423 | if (!map) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2424 | return -ENOMEM; |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2425 | *mapp = map; |
| 2426 | } |
| 2427 | |
| 2428 | *nmaps = nirecs; |
| 2429 | map = *mapp; |
| 2430 | for (i = 0; i < *nmaps; i++) { |
| 2431 | ASSERT(irecs[i].br_startblock != DELAYSTARTBLOCK && |
| 2432 | irecs[i].br_startblock != HOLESTARTBLOCK); |
| 2433 | map[i].bm_bn = XFS_FSB_TO_DADDR(mp, irecs[i].br_startblock); |
| 2434 | map[i].bm_len = XFS_FSB_TO_BB(mp, irecs[i].br_blockcount); |
| 2435 | } |
| 2436 | return 0; |
| 2437 | } |
| 2438 | |
| 2439 | /* |
| 2440 | * Map the block we are given ready for reading. There are three possible return |
| 2441 | * values: |
| 2442 | * -1 - will be returned if we land in a hole and mappedbno == -2 so the |
| 2443 | * caller knows not to execute a subsequent read. |
| 2444 | * 0 - if we mapped the block successfully |
| 2445 | * >0 - positive error number if there was an error. |
| 2446 | */ |
| 2447 | static int |
| 2448 | xfs_dabuf_map( |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2449 | struct xfs_inode *dp, |
| 2450 | xfs_dablk_t bno, |
| 2451 | xfs_daddr_t mappedbno, |
| 2452 | int whichfork, |
| 2453 | struct xfs_buf_map **map, |
| 2454 | int *nmaps) |
| 2455 | { |
| 2456 | struct xfs_mount *mp = dp->i_mount; |
| 2457 | int nfsb; |
| 2458 | int error = 0; |
| 2459 | struct xfs_bmbt_irec irec; |
| 2460 | struct xfs_bmbt_irec *irecs = &irec; |
| 2461 | int nirecs; |
| 2462 | |
| 2463 | ASSERT(map && *map); |
| 2464 | ASSERT(*nmaps == 1); |
| 2465 | |
Dave Chinner | d6cf130 | 2014-06-06 15:14:11 +1000 | [diff] [blame] | 2466 | if (whichfork == XFS_DATA_FORK) |
| 2467 | nfsb = mp->m_dir_geo->fsbcount; |
| 2468 | else |
| 2469 | nfsb = mp->m_attr_geo->fsbcount; |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2470 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | /* |
| 2472 | * Caller doesn't have a mapping. -2 means don't complain |
| 2473 | * if we land in a hole. |
| 2474 | */ |
| 2475 | if (mappedbno == -1 || mappedbno == -2) { |
| 2476 | /* |
| 2477 | * Optimize the one-block case. |
| 2478 | */ |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2479 | if (nfsb != 1) |
Dave Chinner | b17cb36 | 2013-05-20 09:51:12 +1000 | [diff] [blame] | 2480 | irecs = kmem_zalloc(sizeof(irec) * nfsb, |
| 2481 | KM_SLEEP | KM_NOFS); |
Dave Chinner | 5b777ad | 2011-09-18 20:40:46 +0000 | [diff] [blame] | 2482 | |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2483 | nirecs = nfsb; |
| 2484 | error = xfs_bmapi_read(dp, (xfs_fileoff_t)bno, nfsb, irecs, |
| 2485 | &nirecs, xfs_bmapi_aflag(whichfork)); |
Dave Chinner | 5b777ad | 2011-09-18 20:40:46 +0000 | [diff] [blame] | 2486 | if (error) |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2487 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | } else { |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2489 | irecs->br_startblock = XFS_DADDR_TO_FSB(mp, mappedbno); |
| 2490 | irecs->br_startoff = (xfs_fileoff_t)bno; |
| 2491 | irecs->br_blockcount = nfsb; |
| 2492 | irecs->br_state = 0; |
| 2493 | nirecs = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | } |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2495 | |
| 2496 | if (!xfs_da_map_covers_blocks(nirecs, irecs, bno, nfsb)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2497 | error = mappedbno == -2 ? -1 : -EFSCORRUPTED; |
| 2498 | if (unlikely(error == -EFSCORRUPTED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | if (xfs_error_level >= XFS_ERRLEVEL_LOW) { |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2500 | int i; |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 2501 | xfs_alert(mp, "%s: bno %lld dir: inode %lld", |
| 2502 | __func__, (long long)bno, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | (long long)dp->i_ino); |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2504 | for (i = 0; i < *nmaps; i++) { |
Dave Chinner | 0b932cc | 2011-03-07 10:08:35 +1100 | [diff] [blame] | 2505 | xfs_alert(mp, |
| 2506 | "[%02d] br_startoff %lld br_startblock %lld br_blockcount %lld br_state %d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | i, |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2508 | (long long)irecs[i].br_startoff, |
| 2509 | (long long)irecs[i].br_startblock, |
| 2510 | (long long)irecs[i].br_blockcount, |
| 2511 | irecs[i].br_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | } |
| 2513 | } |
| 2514 | XFS_ERROR_REPORT("xfs_da_do_buf(1)", |
| 2515 | XFS_ERRLEVEL_LOW, mp); |
| 2516 | } |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2517 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | } |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2519 | error = xfs_buf_map_from_irec(mp, map, nmaps, irecs, nirecs); |
| 2520 | out: |
| 2521 | if (irecs != &irec) |
| 2522 | kmem_free(irecs); |
| 2523 | return error; |
| 2524 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2525 | |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2526 | /* |
| 2527 | * Get a buffer for the dir/attr block. |
| 2528 | */ |
| 2529 | int |
| 2530 | xfs_da_get_buf( |
| 2531 | struct xfs_trans *trans, |
| 2532 | struct xfs_inode *dp, |
| 2533 | xfs_dablk_t bno, |
| 2534 | xfs_daddr_t mappedbno, |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2535 | struct xfs_buf **bpp, |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2536 | int whichfork) |
| 2537 | { |
| 2538 | struct xfs_buf *bp; |
| 2539 | struct xfs_buf_map map; |
| 2540 | struct xfs_buf_map *mapp; |
| 2541 | int nmap; |
| 2542 | int error; |
| 2543 | |
| 2544 | *bpp = NULL; |
| 2545 | mapp = ↦ |
| 2546 | nmap = 1; |
Eric Sandeen | 9df2dd0 | 2014-04-14 19:01:59 +1000 | [diff] [blame] | 2547 | error = xfs_dabuf_map(dp, bno, mappedbno, whichfork, |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2548 | &mapp, &nmap); |
| 2549 | if (error) { |
| 2550 | /* mapping a hole is not an error, but we don't continue */ |
| 2551 | if (error == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | error = 0; |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2553 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2554 | } |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2555 | |
| 2556 | bp = xfs_trans_get_buf_map(trans, dp->i_mount->m_ddev_targp, |
| 2557 | mapp, nmap, 0); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 2558 | error = bp ? bp->b_error : -EIO; |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2559 | if (error) { |
Eric Sandeen | 6ee49a2 | 2014-10-02 09:23:49 +1000 | [diff] [blame] | 2560 | if (bp) |
| 2561 | xfs_trans_brelse(trans, bp); |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2562 | goto out_free; |
| 2563 | } |
| 2564 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2565 | *bpp = bp; |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2566 | |
| 2567 | out_free: |
| 2568 | if (mapp != &map) |
| 2569 | kmem_free(mapp); |
| 2570 | |
| 2571 | return error; |
| 2572 | } |
| 2573 | |
| 2574 | /* |
| 2575 | * Get a buffer for the dir/attr block, fill in the contents. |
| 2576 | */ |
| 2577 | int |
| 2578 | xfs_da_read_buf( |
| 2579 | struct xfs_trans *trans, |
| 2580 | struct xfs_inode *dp, |
| 2581 | xfs_dablk_t bno, |
| 2582 | xfs_daddr_t mappedbno, |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2583 | struct xfs_buf **bpp, |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 2584 | int whichfork, |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 2585 | const struct xfs_buf_ops *ops) |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2586 | { |
| 2587 | struct xfs_buf *bp; |
| 2588 | struct xfs_buf_map map; |
| 2589 | struct xfs_buf_map *mapp; |
| 2590 | int nmap; |
| 2591 | int error; |
| 2592 | |
| 2593 | *bpp = NULL; |
| 2594 | mapp = ↦ |
| 2595 | nmap = 1; |
Eric Sandeen | 9df2dd0 | 2014-04-14 19:01:59 +1000 | [diff] [blame] | 2596 | error = xfs_dabuf_map(dp, bno, mappedbno, whichfork, |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2597 | &mapp, &nmap); |
| 2598 | if (error) { |
| 2599 | /* mapping a hole is not an error, but we don't continue */ |
| 2600 | if (error == -1) |
| 2601 | error = 0; |
| 2602 | goto out_free; |
| 2603 | } |
| 2604 | |
| 2605 | error = xfs_trans_read_buf_map(dp->i_mount, trans, |
| 2606 | dp->i_mount->m_ddev_targp, |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 2607 | mapp, nmap, 0, &bp, ops); |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2608 | if (error) |
| 2609 | goto out_free; |
| 2610 | |
| 2611 | if (whichfork == XFS_ATTR_FORK) |
| 2612 | xfs_buf_set_ref(bp, XFS_ATTR_BTREE_REF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2613 | else |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2614 | xfs_buf_set_ref(bp, XFS_DIR_BTREE_REF); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 2615 | *bpp = bp; |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2616 | out_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | if (mapp != &map) |
Denys Vlasenko | f0e2d93 | 2008-05-19 16:31:57 +1000 | [diff] [blame] | 2618 | kmem_free(mapp); |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2619 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | return error; |
| 2621 | } |
| 2622 | |
| 2623 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2624 | * Readahead the dir/attr block. |
| 2625 | */ |
| 2626 | xfs_daddr_t |
| 2627 | xfs_da_reada_buf( |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2628 | struct xfs_inode *dp, |
| 2629 | xfs_dablk_t bno, |
Dave Chinner | da6958c | 2012-11-12 22:54:18 +1100 | [diff] [blame] | 2630 | xfs_daddr_t mappedbno, |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 2631 | int whichfork, |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 2632 | const struct xfs_buf_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | { |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2634 | struct xfs_buf_map map; |
| 2635 | struct xfs_buf_map *mapp; |
| 2636 | int nmap; |
| 2637 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2639 | mapp = ↦ |
| 2640 | nmap = 1; |
Eric Sandeen | 9df2dd0 | 2014-04-14 19:01:59 +1000 | [diff] [blame] | 2641 | error = xfs_dabuf_map(dp, bno, mappedbno, whichfork, |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2642 | &mapp, &nmap); |
| 2643 | if (error) { |
| 2644 | /* mapping a hole is not an error, but we don't continue */ |
| 2645 | if (error == -1) |
| 2646 | error = 0; |
| 2647 | goto out_free; |
| 2648 | } |
| 2649 | |
| 2650 | mappedbno = mapp[0].bm_bn; |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 2651 | xfs_buf_readahead_map(dp->i_mount->m_ddev_targp, mapp, nmap, ops); |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2652 | |
| 2653 | out_free: |
| 2654 | if (mapp != &map) |
| 2655 | kmem_free(mapp); |
| 2656 | |
| 2657 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2658 | return -1; |
Dave Chinner | 3605431 | 2012-06-22 18:50:13 +1000 | [diff] [blame] | 2659 | return mappedbno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | } |