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) 2000-2003,2005 Silicon Graphics, Inc. |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +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 | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 21 | #include "xfs_format.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 22 | #include "xfs_log_format.h" |
| 23 | #include "xfs_trans_resv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_sb.h" |
| 25 | #include "xfs_ag.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" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "xfs_inode.h" |
| 30 | #include "xfs_bmap.h" |
Dave Chinner | 2b9ab5a | 2013-08-12 20:49:37 +1000 | [diff] [blame] | 31 | #include "xfs_dir2.h" |
Christoph Hellwig | 5792664 | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 32 | #include "xfs_dir2_priv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_error.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 34 | #include "xfs_trace.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 35 | #include "xfs_trans.h" |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 36 | #include "xfs_buf_item.h" |
| 37 | #include "xfs_cksum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | /* |
| 40 | * Local function declarations. |
| 41 | */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 42 | static int xfs_dir2_leaf_lookup_int(xfs_da_args_t *args, struct xfs_buf **lbpp, |
| 43 | int *indexp, struct xfs_buf **dbpp); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 44 | static void xfs_dir3_leaf_log_bests(struct xfs_trans *tp, struct xfs_buf *bp, |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 45 | int first, int last); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 46 | static void xfs_dir3_leaf_log_tail(struct xfs_trans *tp, struct xfs_buf *bp); |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 47 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 48 | /* |
| 49 | * Check the internal consistency of a leaf1 block. |
| 50 | * Pop an assert if something is wrong. |
| 51 | */ |
| 52 | #ifdef DEBUG |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 53 | #define xfs_dir3_leaf_check(dp, bp) \ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 54 | do { \ |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 55 | if (!xfs_dir3_leaf1_check((dp), (bp))) \ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 56 | ASSERT(0); \ |
| 57 | } while (0); |
| 58 | |
| 59 | STATIC bool |
| 60 | xfs_dir3_leaf1_check( |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 61 | struct xfs_inode *dp, |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 62 | struct xfs_buf *bp) |
| 63 | { |
| 64 | struct xfs_dir2_leaf *leaf = bp->b_addr; |
| 65 | struct xfs_dir3_icleaf_hdr leafhdr; |
| 66 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 67 | dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 68 | |
| 69 | if (leafhdr.magic == XFS_DIR3_LEAF1_MAGIC) { |
| 70 | struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr; |
| 71 | if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn) |
| 72 | return false; |
| 73 | } else if (leafhdr.magic != XFS_DIR2_LEAF1_MAGIC) |
| 74 | return false; |
| 75 | |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 76 | return xfs_dir3_leaf_check_int(dp->i_mount, dp, &leafhdr, leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 77 | } |
| 78 | #else |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 79 | #define xfs_dir3_leaf_check(dp, bp) |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 80 | #endif |
| 81 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 82 | bool |
| 83 | xfs_dir3_leaf_check_int( |
| 84 | struct xfs_mount *mp, |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 85 | struct xfs_inode *dp, |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 86 | struct xfs_dir3_icleaf_hdr *hdr, |
| 87 | struct xfs_dir2_leaf *leaf) |
| 88 | { |
| 89 | struct xfs_dir2_leaf_entry *ents; |
| 90 | xfs_dir2_leaf_tail_t *ltp; |
| 91 | int stale; |
| 92 | int i; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 93 | const struct xfs_dir_ops *ops; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 94 | struct xfs_dir3_icleaf_hdr leafhdr; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 95 | |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 96 | /* |
| 97 | * we can be passed a null dp here from a verifier, so we need to go the |
| 98 | * hard way to get them. |
| 99 | */ |
| 100 | ops = xfs_dir_get_ops(mp, dp); |
| 101 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 102 | if (!hdr) { |
| 103 | ops->leaf_hdr_from_disk(&leafhdr, leaf); |
| 104 | hdr = &leafhdr; |
| 105 | } |
| 106 | |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 107 | ents = ops->leaf_ents_p(leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 108 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
| 109 | |
| 110 | /* |
| 111 | * XXX (dgc): This value is not restrictive enough. |
| 112 | * Should factor in the size of the bests table as well. |
| 113 | * We can deduce a value for that from di_size. |
| 114 | */ |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 115 | if (hdr->count > ops->leaf_max_ents(mp)) |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 116 | return false; |
| 117 | |
| 118 | /* Leaves and bests don't overlap in leaf format. */ |
| 119 | if ((hdr->magic == XFS_DIR2_LEAF1_MAGIC || |
| 120 | hdr->magic == XFS_DIR3_LEAF1_MAGIC) && |
| 121 | (char *)&ents[hdr->count] > (char *)xfs_dir2_leaf_bests_p(ltp)) |
| 122 | return false; |
| 123 | |
| 124 | /* Check hash value order, count stale entries. */ |
| 125 | for (i = stale = 0; i < hdr->count; i++) { |
| 126 | if (i + 1 < hdr->count) { |
| 127 | if (be32_to_cpu(ents[i].hashval) > |
| 128 | be32_to_cpu(ents[i + 1].hashval)) |
| 129 | return false; |
| 130 | } |
| 131 | if (ents[i].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) |
| 132 | stale++; |
| 133 | } |
| 134 | if (hdr->stale != stale) |
| 135 | return false; |
| 136 | return true; |
| 137 | } |
| 138 | |
Dave Chinner | 0f295a2 | 2013-09-03 10:06:58 +1000 | [diff] [blame] | 139 | /* |
| 140 | * We verify the magic numbers before decoding the leaf header so that on debug |
| 141 | * kernels we don't get assertion failures in xfs_dir3_leaf_hdr_from_disk() due |
| 142 | * to incorrect magic numbers. |
| 143 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 144 | static bool |
| 145 | xfs_dir3_leaf_verify( |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 146 | struct xfs_buf *bp, |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 147 | __uint16_t magic) |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 148 | { |
| 149 | struct xfs_mount *mp = bp->b_target->bt_mount; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 150 | struct xfs_dir2_leaf *leaf = bp->b_addr; |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 151 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 152 | ASSERT(magic == XFS_DIR2_LEAF1_MAGIC || magic == XFS_DIR2_LEAFN_MAGIC); |
| 153 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 154 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 155 | struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr; |
Dave Chinner | 0f295a2 | 2013-09-03 10:06:58 +1000 | [diff] [blame] | 156 | __uint16_t magic3; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 157 | |
Dave Chinner | 0f295a2 | 2013-09-03 10:06:58 +1000 | [diff] [blame] | 158 | magic3 = (magic == XFS_DIR2_LEAF1_MAGIC) ? XFS_DIR3_LEAF1_MAGIC |
| 159 | : XFS_DIR3_LEAFN_MAGIC; |
| 160 | |
| 161 | if (leaf3->info.hdr.magic != cpu_to_be16(magic3)) |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 162 | return false; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 163 | if (!uuid_equal(&leaf3->info.uuid, &mp->m_sb.sb_uuid)) |
| 164 | return false; |
| 165 | if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn) |
| 166 | return false; |
| 167 | } else { |
Dave Chinner | 0f295a2 | 2013-09-03 10:06:58 +1000 | [diff] [blame] | 168 | if (leaf->hdr.info.magic != cpu_to_be16(magic)) |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 169 | return false; |
| 170 | } |
Dave Chinner | 0f295a2 | 2013-09-03 10:06:58 +1000 | [diff] [blame] | 171 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 172 | return xfs_dir3_leaf_check_int(mp, NULL, NULL, leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | static void |
| 176 | __read_verify( |
| 177 | struct xfs_buf *bp, |
| 178 | __uint16_t magic) |
| 179 | { |
| 180 | struct xfs_mount *mp = bp->b_target->bt_mount; |
| 181 | |
| 182 | if ((xfs_sb_version_hascrc(&mp->m_sb) && |
| 183 | !xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length), |
| 184 | XFS_DIR3_LEAF_CRC_OFF)) || |
| 185 | !xfs_dir3_leaf_verify(bp, magic)) { |
| 186 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 187 | xfs_buf_ioerror(bp, EFSCORRUPTED); |
| 188 | } |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 189 | } |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 190 | |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 191 | static void |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 192 | __write_verify( |
| 193 | struct xfs_buf *bp, |
| 194 | __uint16_t magic) |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 195 | { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 196 | struct xfs_mount *mp = bp->b_target->bt_mount; |
| 197 | struct xfs_buf_log_item *bip = bp->b_fspriv; |
| 198 | struct xfs_dir3_leaf_hdr *hdr3 = bp->b_addr; |
| 199 | |
| 200 | if (!xfs_dir3_leaf_verify(bp, magic)) { |
| 201 | XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr); |
| 202 | xfs_buf_ioerror(bp, EFSCORRUPTED); |
| 203 | return; |
| 204 | } |
| 205 | |
| 206 | if (!xfs_sb_version_hascrc(&mp->m_sb)) |
| 207 | return; |
| 208 | |
| 209 | if (bip) |
| 210 | hdr3->info.lsn = cpu_to_be64(bip->bli_item.li_lsn); |
| 211 | |
| 212 | xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length), XFS_DIR3_LEAF_CRC_OFF); |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | static void |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 216 | xfs_dir3_leaf1_read_verify( |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 217 | struct xfs_buf *bp) |
| 218 | { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 219 | __read_verify(bp, XFS_DIR2_LEAF1_MAGIC); |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 220 | } |
| 221 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 222 | static void |
| 223 | xfs_dir3_leaf1_write_verify( |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 224 | struct xfs_buf *bp) |
| 225 | { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 226 | __write_verify(bp, XFS_DIR2_LEAF1_MAGIC); |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 227 | } |
| 228 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 229 | static void |
| 230 | xfs_dir3_leafn_read_verify( |
Dave Chinner | 612cfbf | 2012-11-14 17:52:32 +1100 | [diff] [blame] | 231 | struct xfs_buf *bp) |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 232 | { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 233 | __read_verify(bp, XFS_DIR2_LEAFN_MAGIC); |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 234 | } |
| 235 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 236 | static void |
| 237 | xfs_dir3_leafn_write_verify( |
| 238 | struct xfs_buf *bp) |
| 239 | { |
| 240 | __write_verify(bp, XFS_DIR2_LEAFN_MAGIC); |
| 241 | } |
| 242 | |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 243 | const struct xfs_buf_ops xfs_dir3_leaf1_buf_ops = { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 244 | .verify_read = xfs_dir3_leaf1_read_verify, |
| 245 | .verify_write = xfs_dir3_leaf1_write_verify, |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 246 | }; |
| 247 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 248 | const struct xfs_buf_ops xfs_dir3_leafn_buf_ops = { |
| 249 | .verify_read = xfs_dir3_leafn_read_verify, |
| 250 | .verify_write = xfs_dir3_leafn_write_verify, |
Dave Chinner | 1813dd6 | 2012-11-14 17:54:40 +1100 | [diff] [blame] | 251 | }; |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 252 | |
| 253 | static int |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 254 | xfs_dir3_leaf_read( |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 255 | struct xfs_trans *tp, |
| 256 | struct xfs_inode *dp, |
| 257 | xfs_dablk_t fbno, |
| 258 | xfs_daddr_t mappedbno, |
| 259 | struct xfs_buf **bpp) |
| 260 | { |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 261 | int err; |
| 262 | |
| 263 | err = xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp, |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 264 | XFS_DATA_FORK, &xfs_dir3_leaf1_buf_ops); |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 265 | if (!err && tp) |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 266 | xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_LEAF1_BUF); |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 267 | return err; |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 268 | } |
| 269 | |
| 270 | int |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 271 | xfs_dir3_leafn_read( |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 272 | struct xfs_trans *tp, |
| 273 | struct xfs_inode *dp, |
| 274 | xfs_dablk_t fbno, |
| 275 | xfs_daddr_t mappedbno, |
| 276 | struct xfs_buf **bpp) |
| 277 | { |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 278 | int err; |
| 279 | |
| 280 | err = xfs_da_read_buf(tp, dp, fbno, mappedbno, bpp, |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 281 | XFS_DATA_FORK, &xfs_dir3_leafn_buf_ops); |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 282 | if (!err && tp) |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 283 | xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_LEAFN_BUF); |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 284 | return err; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | /* |
| 288 | * Initialize a new leaf block, leaf1 or leafn magic accepted. |
| 289 | */ |
| 290 | static void |
| 291 | xfs_dir3_leaf_init( |
| 292 | struct xfs_mount *mp, |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 293 | struct xfs_trans *tp, |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 294 | struct xfs_buf *bp, |
| 295 | xfs_ino_t owner, |
| 296 | __uint16_t type) |
| 297 | { |
| 298 | struct xfs_dir2_leaf *leaf = bp->b_addr; |
| 299 | |
| 300 | ASSERT(type == XFS_DIR2_LEAF1_MAGIC || type == XFS_DIR2_LEAFN_MAGIC); |
| 301 | |
| 302 | if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| 303 | struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr; |
| 304 | |
| 305 | memset(leaf3, 0, sizeof(*leaf3)); |
| 306 | |
| 307 | leaf3->info.hdr.magic = (type == XFS_DIR2_LEAF1_MAGIC) |
| 308 | ? cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) |
| 309 | : cpu_to_be16(XFS_DIR3_LEAFN_MAGIC); |
| 310 | leaf3->info.blkno = cpu_to_be64(bp->b_bn); |
| 311 | leaf3->info.owner = cpu_to_be64(owner); |
| 312 | uuid_copy(&leaf3->info.uuid, &mp->m_sb.sb_uuid); |
| 313 | } else { |
| 314 | memset(leaf, 0, sizeof(*leaf)); |
| 315 | leaf->hdr.info.magic = cpu_to_be16(type); |
| 316 | } |
| 317 | |
| 318 | /* |
| 319 | * If it's a leaf-format directory initialize the tail. |
| 320 | * Caller is responsible for initialising the bests table. |
| 321 | */ |
| 322 | if (type == XFS_DIR2_LEAF1_MAGIC) { |
| 323 | struct xfs_dir2_leaf_tail *ltp; |
| 324 | |
| 325 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
| 326 | ltp->bestcount = 0; |
| 327 | bp->b_ops = &xfs_dir3_leaf1_buf_ops; |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 328 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAF1_BUF); |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 329 | } else { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 330 | bp->b_ops = &xfs_dir3_leafn_buf_ops; |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 331 | xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAFN_BUF); |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 332 | } |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | int |
| 336 | xfs_dir3_leaf_get_buf( |
| 337 | xfs_da_args_t *args, |
| 338 | xfs_dir2_db_t bno, |
| 339 | struct xfs_buf **bpp, |
| 340 | __uint16_t magic) |
| 341 | { |
| 342 | struct xfs_inode *dp = args->dp; |
| 343 | struct xfs_trans *tp = args->trans; |
| 344 | struct xfs_mount *mp = dp->i_mount; |
| 345 | struct xfs_buf *bp; |
| 346 | int error; |
| 347 | |
| 348 | ASSERT(magic == XFS_DIR2_LEAF1_MAGIC || magic == XFS_DIR2_LEAFN_MAGIC); |
| 349 | ASSERT(bno >= XFS_DIR2_LEAF_FIRSTDB(mp) && |
| 350 | bno < XFS_DIR2_FREE_FIRSTDB(mp)); |
| 351 | |
| 352 | error = xfs_da_get_buf(tp, dp, xfs_dir2_db_to_da(mp, bno), -1, &bp, |
| 353 | XFS_DATA_FORK); |
| 354 | if (error) |
| 355 | return error; |
| 356 | |
Dave Chinner | d75afeb | 2013-04-03 16:11:29 +1100 | [diff] [blame] | 357 | xfs_dir3_leaf_init(mp, tp, bp, dp->i_ino, magic); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 358 | xfs_dir3_leaf_log_header(tp, dp, bp); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 359 | if (magic == XFS_DIR2_LEAF1_MAGIC) |
| 360 | xfs_dir3_leaf_log_tail(tp, bp); |
| 361 | *bpp = bp; |
| 362 | return 0; |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 363 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
| 365 | /* |
| 366 | * Convert a block form directory to a leaf form directory. |
| 367 | */ |
| 368 | int /* error */ |
| 369 | xfs_dir2_block_to_leaf( |
| 370 | xfs_da_args_t *args, /* operation arguments */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 371 | struct xfs_buf *dbp) /* input block's buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | { |
Nathan Scott | 68b3a10 | 2006-03-17 17:27:19 +1100 | [diff] [blame] | 373 | __be16 *bestsp; /* leaf's bestsp entries */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | xfs_dablk_t blkno; /* leaf block's bno */ |
Christoph Hellwig | 4f6ae1a | 2011-07-08 14:35:27 +0200 | [diff] [blame] | 375 | xfs_dir2_data_hdr_t *hdr; /* block header */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | xfs_dir2_leaf_entry_t *blp; /* block's leaf entries */ |
| 377 | xfs_dir2_block_tail_t *btp; /* block's tail */ |
| 378 | xfs_inode_t *dp; /* incore directory inode */ |
| 379 | int error; /* error return code */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 380 | struct xfs_buf *lbp; /* leaf block's buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | xfs_dir2_db_t ldb; /* leaf block's bno */ |
| 382 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 383 | xfs_dir2_leaf_tail_t *ltp; /* leaf's tail */ |
| 384 | xfs_mount_t *mp; /* filesystem mount point */ |
| 385 | int needlog; /* need to log block header */ |
| 386 | int needscan; /* need to rescan bestfree */ |
| 387 | xfs_trans_t *tp; /* transaction pointer */ |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 388 | struct xfs_dir2_data_free *bf; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 389 | struct xfs_dir2_leaf_entry *ents; |
| 390 | struct xfs_dir3_icleaf_hdr leafhdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 392 | trace_xfs_dir2_block_to_leaf(args); |
| 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | dp = args->dp; |
| 395 | mp = dp->i_mount; |
| 396 | tp = args->trans; |
| 397 | /* |
| 398 | * Add the leaf block to the inode. |
| 399 | * This interface will only put blocks in the leaf/node range. |
| 400 | * Since that's empty now, we'll get the root (block 0 in range). |
| 401 | */ |
| 402 | if ((error = xfs_da_grow_inode(args, &blkno))) { |
| 403 | return error; |
| 404 | } |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 405 | ldb = xfs_dir2_da_to_db(mp, blkno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | ASSERT(ldb == XFS_DIR2_LEAF_FIRSTDB(mp)); |
| 407 | /* |
| 408 | * Initialize the leaf block, get a buffer for it. |
| 409 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 410 | error = xfs_dir3_leaf_get_buf(args, ldb, &lbp, XFS_DIR2_LEAF1_MAGIC); |
| 411 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | return error; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 413 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 414 | leaf = lbp->b_addr; |
| 415 | hdr = dbp->b_addr; |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 416 | xfs_dir3_data_check(dp, dbp); |
Christoph Hellwig | 4f6ae1a | 2011-07-08 14:35:27 +0200 | [diff] [blame] | 417 | btp = xfs_dir2_block_tail_p(mp, hdr); |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 418 | blp = xfs_dir2_block_leaf_p(btp); |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 419 | bf = dp->d_ops->data_bestfree_p(hdr); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 420 | ents = dp->d_ops->leaf_ents_p(leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | /* |
| 423 | * Set the counts in the leaf header. |
| 424 | */ |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 425 | dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 426 | leafhdr.count = be32_to_cpu(btp->count); |
| 427 | leafhdr.stale = be32_to_cpu(btp->stale); |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 428 | dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 429 | xfs_dir3_leaf_log_header(tp, dp, lbp); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | /* |
| 432 | * Could compact these but I think we always do the conversion |
| 433 | * after squeezing out stale entries. |
| 434 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 435 | memcpy(ents, blp, be32_to_cpu(btp->count) * sizeof(xfs_dir2_leaf_entry_t)); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 436 | xfs_dir3_leaf_log_ents(tp, dp, lbp, 0, leafhdr.count - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | needscan = 0; |
| 438 | needlog = 1; |
| 439 | /* |
| 440 | * Make the space formerly occupied by the leaf entries and block |
| 441 | * tail be free. |
| 442 | */ |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 443 | xfs_dir2_data_make_free(tp, dp, dbp, |
Christoph Hellwig | 4f6ae1a | 2011-07-08 14:35:27 +0200 | [diff] [blame] | 444 | (xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr), |
| 445 | (xfs_dir2_data_aoff_t)((char *)hdr + mp->m_dirblksize - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | (char *)blp), |
| 447 | &needlog, &needscan); |
| 448 | /* |
| 449 | * Fix up the block header, make it a data block. |
| 450 | */ |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 451 | dbp->b_ops = &xfs_dir3_data_buf_ops; |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 452 | xfs_trans_buf_set_type(tp, dbp, XFS_BLFT_DIR_DATA_BUF); |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 453 | if (hdr->magic == cpu_to_be32(XFS_DIR2_BLOCK_MAGIC)) |
| 454 | hdr->magic = cpu_to_be32(XFS_DIR2_DATA_MAGIC); |
| 455 | else |
| 456 | hdr->magic = cpu_to_be32(XFS_DIR3_DATA_MAGIC); |
| 457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | if (needscan) |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 459 | xfs_dir2_data_freescan(dp, hdr, &needlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | /* |
| 461 | * Set up leaf tail and bests table. |
| 462 | */ |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 463 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
Nathan Scott | afbcb3f | 2006-03-17 17:27:28 +1100 | [diff] [blame] | 464 | ltp->bestcount = cpu_to_be32(1); |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 465 | bestsp = xfs_dir2_leaf_bests_p(ltp); |
Dave Chinner | f5f3d9b | 2013-04-03 16:11:20 +1100 | [diff] [blame] | 466 | bestsp[0] = bf[0].length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | /* |
| 468 | * Log the data header and leaf bests table. |
| 469 | */ |
| 470 | if (needlog) |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 471 | xfs_dir2_data_log_header(tp, dp, dbp); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 472 | xfs_dir3_leaf_check(dp, lbp); |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 473 | xfs_dir3_data_check(dp, dbp); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 474 | xfs_dir3_leaf_log_bests(tp, lbp, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | return 0; |
| 476 | } |
| 477 | |
Christoph Hellwig | a230a1d | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 478 | STATIC void |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 479 | xfs_dir3_leaf_find_stale( |
| 480 | struct xfs_dir3_icleaf_hdr *leafhdr, |
| 481 | struct xfs_dir2_leaf_entry *ents, |
Christoph Hellwig | a230a1d | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 482 | int index, |
| 483 | int *lowstale, |
| 484 | int *highstale) |
| 485 | { |
| 486 | /* |
| 487 | * Find the first stale entry before our index, if any. |
| 488 | */ |
| 489 | for (*lowstale = index - 1; *lowstale >= 0; --*lowstale) { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 490 | if (ents[*lowstale].address == |
Christoph Hellwig | a230a1d | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 491 | cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) |
| 492 | break; |
| 493 | } |
| 494 | |
| 495 | /* |
| 496 | * Find the first stale entry at or after our index, if any. |
| 497 | * Stop if the result would require moving more entries than using |
| 498 | * lowstale. |
| 499 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 500 | for (*highstale = index; *highstale < leafhdr->count; ++*highstale) { |
| 501 | if (ents[*highstale].address == |
Christoph Hellwig | a230a1d | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 502 | cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) |
| 503 | break; |
| 504 | if (*lowstale >= 0 && index - *lowstale <= *highstale - index) |
| 505 | break; |
| 506 | } |
| 507 | } |
| 508 | |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 509 | struct xfs_dir2_leaf_entry * |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 510 | xfs_dir3_leaf_find_entry( |
| 511 | struct xfs_dir3_icleaf_hdr *leafhdr, |
| 512 | struct xfs_dir2_leaf_entry *ents, |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 513 | int index, /* leaf table position */ |
| 514 | int compact, /* need to compact leaves */ |
| 515 | int lowstale, /* index of prev stale leaf */ |
| 516 | int highstale, /* index of next stale leaf */ |
| 517 | int *lfloglow, /* low leaf logging index */ |
| 518 | int *lfloghigh) /* high leaf logging index */ |
| 519 | { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 520 | if (!leafhdr->stale) { |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 521 | xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */ |
| 522 | |
| 523 | /* |
| 524 | * Now we need to make room to insert the leaf entry. |
| 525 | * |
| 526 | * If there are no stale entries, just insert a hole at index. |
| 527 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 528 | lep = &ents[index]; |
| 529 | if (index < leafhdr->count) |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 530 | memmove(lep + 1, lep, |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 531 | (leafhdr->count - index) * sizeof(*lep)); |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 532 | |
| 533 | /* |
| 534 | * Record low and high logging indices for the leaf. |
| 535 | */ |
| 536 | *lfloglow = index; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 537 | *lfloghigh = leafhdr->count++; |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 538 | return lep; |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * There are stale entries. |
| 543 | * |
| 544 | * We will use one of them for the new entry. It's probably not at |
| 545 | * the right location, so we'll have to shift some up or down first. |
| 546 | * |
| 547 | * If we didn't compact before, we need to find the nearest stale |
| 548 | * entries before and after our insertion point. |
| 549 | */ |
Christoph Hellwig | a230a1d | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 550 | if (compact == 0) |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 551 | xfs_dir3_leaf_find_stale(leafhdr, ents, index, |
| 552 | &lowstale, &highstale); |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 553 | |
| 554 | /* |
| 555 | * If the low one is better, use it. |
| 556 | */ |
| 557 | if (lowstale >= 0 && |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 558 | (highstale == leafhdr->count || |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 559 | index - lowstale - 1 < highstale - index)) { |
| 560 | ASSERT(index - lowstale - 1 >= 0); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 561 | ASSERT(ents[lowstale].address == |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 562 | cpu_to_be32(XFS_DIR2_NULL_DATAPTR)); |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 563 | |
| 564 | /* |
| 565 | * Copy entries up to cover the stale entry and make room |
| 566 | * for the new entry. |
| 567 | */ |
| 568 | if (index - lowstale - 1 > 0) { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 569 | memmove(&ents[lowstale], &ents[lowstale + 1], |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 570 | (index - lowstale - 1) * |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 571 | sizeof(xfs_dir2_leaf_entry_t)); |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 572 | } |
| 573 | *lfloglow = MIN(lowstale, *lfloglow); |
| 574 | *lfloghigh = MAX(index - 1, *lfloghigh); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 575 | leafhdr->stale--; |
| 576 | return &ents[index - 1]; |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | /* |
| 580 | * The high one is better, so use that one. |
| 581 | */ |
| 582 | ASSERT(highstale - index >= 0); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 583 | ASSERT(ents[highstale].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)); |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 584 | |
| 585 | /* |
| 586 | * Copy entries down to cover the stale entry and make room for the |
| 587 | * new entry. |
| 588 | */ |
| 589 | if (highstale - index > 0) { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 590 | memmove(&ents[index + 1], &ents[index], |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 591 | (highstale - index) * sizeof(xfs_dir2_leaf_entry_t)); |
| 592 | } |
| 593 | *lfloglow = MIN(index, *lfloglow); |
| 594 | *lfloghigh = MAX(highstale, *lfloghigh); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 595 | leafhdr->stale--; |
| 596 | return &ents[index]; |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 597 | } |
| 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | /* |
| 600 | * Add an entry to a leaf form directory. |
| 601 | */ |
| 602 | int /* error */ |
| 603 | xfs_dir2_leaf_addname( |
| 604 | xfs_da_args_t *args) /* operation arguments */ |
| 605 | { |
Nathan Scott | 68b3a10 | 2006-03-17 17:27:19 +1100 | [diff] [blame] | 606 | __be16 *bestsp; /* freespace table in leaf */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | int compact; /* need to compact leaves */ |
Christoph Hellwig | c2066e2 | 2011-07-08 14:35:38 +0200 | [diff] [blame] | 608 | xfs_dir2_data_hdr_t *hdr; /* data block header */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 609 | struct xfs_buf *dbp; /* data block buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | xfs_dir2_data_entry_t *dep; /* data block entry */ |
| 611 | xfs_inode_t *dp; /* incore directory inode */ |
| 612 | xfs_dir2_data_unused_t *dup; /* data unused entry */ |
| 613 | int error; /* error return value */ |
| 614 | int grown; /* allocated new data block */ |
| 615 | int highstale; /* index of next stale leaf */ |
| 616 | int i; /* temporary, index */ |
| 617 | int index; /* leaf table position */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 618 | struct xfs_buf *lbp; /* leaf's buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 620 | int length; /* length of new entry */ |
| 621 | xfs_dir2_leaf_entry_t *lep; /* leaf entry table pointer */ |
| 622 | int lfloglow; /* low leaf logging index */ |
| 623 | int lfloghigh; /* high leaf logging index */ |
| 624 | int lowstale; /* index of prev stale leaf */ |
| 625 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail pointer */ |
| 626 | xfs_mount_t *mp; /* filesystem mount point */ |
| 627 | int needbytes; /* leaf block bytes needed */ |
| 628 | int needlog; /* need to log data header */ |
| 629 | int needscan; /* need to rescan data free */ |
Nathan Scott | 3d693c6 | 2006-03-17 17:28:27 +1100 | [diff] [blame] | 630 | __be16 *tagp; /* end of data entry */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | xfs_trans_t *tp; /* transaction pointer */ |
| 632 | xfs_dir2_db_t use_block; /* data block number */ |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 633 | struct xfs_dir2_data_free *bf; /* bestfree table */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 634 | struct xfs_dir2_leaf_entry *ents; |
| 635 | struct xfs_dir3_icleaf_hdr leafhdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 637 | trace_xfs_dir2_leaf_addname(args); |
| 638 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | dp = args->dp; |
| 640 | tp = args->trans; |
| 641 | mp = dp->i_mount; |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 642 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 643 | error = xfs_dir3_leaf_read(tp, dp, mp->m_dirleafblk, -1, &lbp); |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 644 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | return error; |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | /* |
| 648 | * Look up the entry by hash value and name. |
| 649 | * We know it's not there, our caller has already done a lookup. |
| 650 | * So the index is of the entry to insert in front of. |
| 651 | * But if there are dup hash values the index is of the first of those. |
| 652 | */ |
| 653 | index = xfs_dir2_leaf_search_hash(args, lbp); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 654 | leaf = lbp->b_addr; |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 655 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 656 | ents = dp->d_ops->leaf_ents_p(leaf); |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 657 | dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf); |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 658 | bestsp = xfs_dir2_leaf_bests_p(ltp); |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 659 | length = dp->d_ops->data_entsize(args->namelen); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | /* |
| 662 | * See if there are any entries with the same hash value |
| 663 | * and space in their block for the new entry. |
| 664 | * This is good because it puts multiple same-hash value entries |
| 665 | * in a data block, improving the lookup of those entries. |
| 666 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 667 | for (use_block = -1, lep = &ents[index]; |
| 668 | index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | index++, lep++) { |
Nathan Scott | 3c1f9c1 | 2006-03-17 17:28:18 +1100 | [diff] [blame] | 670 | if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | continue; |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 672 | i = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address)); |
Nathan Scott | afbcb3f | 2006-03-17 17:27:28 +1100 | [diff] [blame] | 673 | ASSERT(i < be32_to_cpu(ltp->bestcount)); |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 674 | ASSERT(bestsp[i] != cpu_to_be16(NULLDATAOFF)); |
Nathan Scott | 68b3a10 | 2006-03-17 17:27:19 +1100 | [diff] [blame] | 675 | if (be16_to_cpu(bestsp[i]) >= length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | use_block = i; |
| 677 | break; |
| 678 | } |
| 679 | } |
| 680 | /* |
| 681 | * Didn't find a block yet, linear search all the data blocks. |
| 682 | */ |
| 683 | if (use_block == -1) { |
Nathan Scott | afbcb3f | 2006-03-17 17:27:28 +1100 | [diff] [blame] | 684 | for (i = 0; i < be32_to_cpu(ltp->bestcount); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | /* |
| 686 | * Remember a block we see that's missing. |
| 687 | */ |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 688 | if (bestsp[i] == cpu_to_be16(NULLDATAOFF) && |
| 689 | use_block == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | use_block = i; |
Nathan Scott | 68b3a10 | 2006-03-17 17:27:19 +1100 | [diff] [blame] | 691 | else if (be16_to_cpu(bestsp[i]) >= length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | use_block = i; |
| 693 | break; |
| 694 | } |
| 695 | } |
| 696 | } |
| 697 | /* |
| 698 | * How many bytes do we need in the leaf block? |
| 699 | */ |
Christoph Hellwig | 2282396 | 2011-07-08 14:35:53 +0200 | [diff] [blame] | 700 | needbytes = 0; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 701 | if (!leafhdr.stale) |
Christoph Hellwig | 2282396 | 2011-07-08 14:35:53 +0200 | [diff] [blame] | 702 | needbytes += sizeof(xfs_dir2_leaf_entry_t); |
| 703 | if (use_block == -1) |
| 704 | needbytes += sizeof(xfs_dir2_data_off_t); |
| 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | /* |
| 707 | * Now kill use_block if it refers to a missing block, so we |
| 708 | * can use it as an indication of allocation needed. |
| 709 | */ |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 710 | if (use_block != -1 && bestsp[use_block] == cpu_to_be16(NULLDATAOFF)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | use_block = -1; |
| 712 | /* |
| 713 | * If we don't have enough free bytes but we can make enough |
| 714 | * by compacting out stale entries, we'll do that. |
| 715 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 716 | if ((char *)bestsp - (char *)&ents[leafhdr.count] < needbytes && |
| 717 | leafhdr.stale > 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | compact = 1; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 719 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | /* |
| 721 | * Otherwise if we don't have enough free bytes we need to |
| 722 | * convert to node form. |
| 723 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 724 | else if ((char *)bestsp - (char *)&ents[leafhdr.count] < needbytes) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | /* |
| 726 | * Just checking or no space reservation, give up. |
| 727 | */ |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 728 | if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || |
| 729 | args->total == 0) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 730 | xfs_trans_brelse(tp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | return XFS_ERROR(ENOSPC); |
| 732 | } |
| 733 | /* |
| 734 | * Convert to node form. |
| 735 | */ |
| 736 | error = xfs_dir2_leaf_to_node(args, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | if (error) |
| 738 | return error; |
| 739 | /* |
| 740 | * Then add the new entry. |
| 741 | */ |
| 742 | return xfs_dir2_node_addname(args); |
| 743 | } |
| 744 | /* |
| 745 | * Otherwise it will fit without compaction. |
| 746 | */ |
| 747 | else |
| 748 | compact = 0; |
| 749 | /* |
| 750 | * If just checking, then it will fit unless we needed to allocate |
| 751 | * a new data block. |
| 752 | */ |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 753 | if (args->op_flags & XFS_DA_OP_JUSTCHECK) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 754 | xfs_trans_brelse(tp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | return use_block == -1 ? XFS_ERROR(ENOSPC) : 0; |
| 756 | } |
| 757 | /* |
| 758 | * If no allocations are allowed, return now before we've |
| 759 | * changed anything. |
| 760 | */ |
| 761 | if (args->total == 0 && use_block == -1) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 762 | xfs_trans_brelse(tp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | return XFS_ERROR(ENOSPC); |
| 764 | } |
| 765 | /* |
| 766 | * Need to compact the leaf entries, removing stale ones. |
| 767 | * Leave one stale entry behind - the one closest to our |
| 768 | * insertion index - and we'll shift that one to our insertion |
| 769 | * point later. |
| 770 | */ |
| 771 | if (compact) { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 772 | xfs_dir3_leaf_compact_x1(&leafhdr, ents, &index, &lowstale, |
| 773 | &highstale, &lfloglow, &lfloghigh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | } |
| 775 | /* |
| 776 | * There are stale entries, so we'll need log-low and log-high |
| 777 | * impossibly bad values later. |
| 778 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 779 | else if (leafhdr.stale) { |
| 780 | lfloglow = leafhdr.count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | lfloghigh = -1; |
| 782 | } |
| 783 | /* |
| 784 | * If there was no data block space found, we need to allocate |
| 785 | * a new one. |
| 786 | */ |
| 787 | if (use_block == -1) { |
| 788 | /* |
| 789 | * Add the new data block. |
| 790 | */ |
| 791 | if ((error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, |
| 792 | &use_block))) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 793 | xfs_trans_brelse(tp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | return error; |
| 795 | } |
| 796 | /* |
| 797 | * Initialize the block. |
| 798 | */ |
Dave Chinner | f5f3d9b | 2013-04-03 16:11:20 +1100 | [diff] [blame] | 799 | if ((error = xfs_dir3_data_init(args, use_block, &dbp))) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 800 | xfs_trans_brelse(tp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | return error; |
| 802 | } |
| 803 | /* |
| 804 | * If we're adding a new data block on the end we need to |
| 805 | * extend the bests table. Copy it up one entry. |
| 806 | */ |
Nathan Scott | afbcb3f | 2006-03-17 17:27:28 +1100 | [diff] [blame] | 807 | if (use_block >= be32_to_cpu(ltp->bestcount)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | bestsp--; |
| 809 | memmove(&bestsp[0], &bestsp[1], |
Nathan Scott | afbcb3f | 2006-03-17 17:27:28 +1100 | [diff] [blame] | 810 | be32_to_cpu(ltp->bestcount) * sizeof(bestsp[0])); |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 811 | be32_add_cpu(<p->bestcount, 1); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 812 | xfs_dir3_leaf_log_tail(tp, lbp); |
| 813 | xfs_dir3_leaf_log_bests(tp, lbp, 0, be32_to_cpu(ltp->bestcount) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | } |
| 815 | /* |
| 816 | * If we're filling in a previously empty block just log it. |
| 817 | */ |
| 818 | else |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 819 | xfs_dir3_leaf_log_bests(tp, lbp, use_block, use_block); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 820 | hdr = dbp->b_addr; |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 821 | bf = dp->d_ops->data_bestfree_p(hdr); |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 822 | bestsp[use_block] = bf[0].length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | grown = 1; |
Dave Chinner | e481357 | 2012-11-12 22:54:14 +1100 | [diff] [blame] | 824 | } else { |
| 825 | /* |
| 826 | * Already had space in some data block. |
| 827 | * Just read that one in. |
| 828 | */ |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 829 | error = xfs_dir3_data_read(tp, dp, |
Dave Chinner | e481357 | 2012-11-12 22:54:14 +1100 | [diff] [blame] | 830 | xfs_dir2_db_to_da(mp, use_block), |
| 831 | -1, &dbp); |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 832 | if (error) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 833 | xfs_trans_brelse(tp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | return error; |
| 835 | } |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 836 | hdr = dbp->b_addr; |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 837 | bf = dp->d_ops->data_bestfree_p(hdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | grown = 0; |
| 839 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | /* |
| 841 | * Point to the biggest freespace in our data block. |
| 842 | */ |
| 843 | dup = (xfs_dir2_data_unused_t *) |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 844 | ((char *)hdr + be16_to_cpu(bf[0].offset)); |
Nathan Scott | ad354eb | 2006-03-17 17:27:37 +1100 | [diff] [blame] | 845 | ASSERT(be16_to_cpu(dup->length) >= length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | needscan = needlog = 0; |
| 847 | /* |
| 848 | * Mark the initial part of our freespace in use for the new entry. |
| 849 | */ |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 850 | xfs_dir2_data_use_free(tp, dp, dbp, dup, |
Christoph Hellwig | c2066e2 | 2011-07-08 14:35:38 +0200 | [diff] [blame] | 851 | (xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr), length, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | &needlog, &needscan); |
| 853 | /* |
| 854 | * Initialize our new entry (at last). |
| 855 | */ |
| 856 | dep = (xfs_dir2_data_entry_t *)dup; |
Christoph Hellwig | ff9901c | 2006-06-09 14:48:37 +1000 | [diff] [blame] | 857 | dep->inumber = cpu_to_be64(args->inumber); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | dep->namelen = args->namelen; |
| 859 | memcpy(dep->name, args->name, dep->namelen); |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 860 | dp->d_ops->data_put_ftype(dep, args->filetype); |
| 861 | tagp = dp->d_ops->data_entry_tag_p(dep); |
Christoph Hellwig | c2066e2 | 2011-07-08 14:35:38 +0200 | [diff] [blame] | 862 | *tagp = cpu_to_be16((char *)dep - (char *)hdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | /* |
| 864 | * Need to scan fix up the bestfree table. |
| 865 | */ |
| 866 | if (needscan) |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 867 | xfs_dir2_data_freescan(dp, hdr, &needlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | /* |
| 869 | * Need to log the data block's header. |
| 870 | */ |
| 871 | if (needlog) |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 872 | xfs_dir2_data_log_header(tp, dp, dbp); |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 873 | xfs_dir2_data_log_entry(tp, dp, dbp, dep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | /* |
| 875 | * If the bests table needs to be changed, do it. |
| 876 | * Log the change unless we've already done that. |
| 877 | */ |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 878 | if (be16_to_cpu(bestsp[use_block]) != be16_to_cpu(bf[0].length)) { |
| 879 | bestsp[use_block] = bf[0].length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | if (!grown) |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 881 | xfs_dir3_leaf_log_bests(tp, lbp, use_block, use_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | } |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 883 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 884 | lep = xfs_dir3_leaf_find_entry(&leafhdr, ents, index, compact, lowstale, |
Christoph Hellwig | 4fb44c8 | 2011-07-08 14:34:59 +0200 | [diff] [blame] | 885 | highstale, &lfloglow, &lfloghigh); |
| 886 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | /* |
| 888 | * Fill in the new leaf entry. |
| 889 | */ |
Nathan Scott | 3c1f9c1 | 2006-03-17 17:28:18 +1100 | [diff] [blame] | 890 | lep->hashval = cpu_to_be32(args->hashval); |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 891 | lep->address = cpu_to_be32(xfs_dir2_db_off_to_dataptr(mp, use_block, |
Nathan Scott | 3d693c6 | 2006-03-17 17:28:27 +1100 | [diff] [blame] | 892 | be16_to_cpu(*tagp))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | /* |
| 894 | * Log the leaf fields and give up the buffers. |
| 895 | */ |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 896 | dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 897 | xfs_dir3_leaf_log_header(tp, dp, lbp); |
| 898 | xfs_dir3_leaf_log_ents(tp, dp, lbp, lfloglow, lfloghigh); |
| 899 | xfs_dir3_leaf_check(dp, lbp); |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 900 | xfs_dir3_data_check(dp, dbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | return 0; |
| 902 | } |
| 903 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | /* |
| 905 | * Compact out any stale entries in the leaf. |
| 906 | * Log the header and changed leaf entries, if any. |
| 907 | */ |
| 908 | void |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 909 | xfs_dir3_leaf_compact( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | xfs_da_args_t *args, /* operation arguments */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 911 | struct xfs_dir3_icleaf_hdr *leafhdr, |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 912 | struct xfs_buf *bp) /* leaf buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | { |
| 914 | int from; /* source leaf index */ |
| 915 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 916 | int loglow; /* first leaf entry to log */ |
| 917 | int to; /* target leaf index */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 918 | struct xfs_dir2_leaf_entry *ents; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 919 | struct xfs_inode *dp = args->dp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 921 | leaf = bp->b_addr; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 922 | if (!leafhdr->stale) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | return; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | /* |
| 926 | * Compress out the stale entries in place. |
| 927 | */ |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 928 | ents = dp->d_ops->leaf_ents_p(leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 929 | for (from = to = 0, loglow = -1; from < leafhdr->count; from++) { |
| 930 | if (ents[from].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | continue; |
| 932 | /* |
| 933 | * Only actually copy the entries that are different. |
| 934 | */ |
| 935 | if (from > to) { |
| 936 | if (loglow == -1) |
| 937 | loglow = to; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 938 | ents[to] = ents[from]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | } |
| 940 | to++; |
| 941 | } |
| 942 | /* |
| 943 | * Update and log the header, log the leaf entries. |
| 944 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 945 | ASSERT(leafhdr->stale == from - to); |
| 946 | leafhdr->count -= leafhdr->stale; |
| 947 | leafhdr->stale = 0; |
| 948 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 949 | dp->d_ops->leaf_hdr_to_disk(leaf, leafhdr); |
| 950 | xfs_dir3_leaf_log_header(args->trans, dp, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | if (loglow != -1) |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 952 | xfs_dir3_leaf_log_ents(args->trans, dp, bp, loglow, to - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | } |
| 954 | |
| 955 | /* |
| 956 | * Compact the leaf entries, removing stale ones. |
| 957 | * Leave one stale entry behind - the one closest to our |
| 958 | * insertion index - and the caller will shift that one to our insertion |
| 959 | * point later. |
| 960 | * Return new insertion index, where the remaining stale entry is, |
| 961 | * and leaf logging indices. |
| 962 | */ |
| 963 | void |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 964 | xfs_dir3_leaf_compact_x1( |
| 965 | struct xfs_dir3_icleaf_hdr *leafhdr, |
| 966 | struct xfs_dir2_leaf_entry *ents, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | int *indexp, /* insertion index */ |
| 968 | int *lowstalep, /* out: stale entry before us */ |
| 969 | int *highstalep, /* out: stale entry after us */ |
| 970 | int *lowlogp, /* out: low log index */ |
| 971 | int *highlogp) /* out: high log index */ |
| 972 | { |
| 973 | int from; /* source copy index */ |
| 974 | int highstale; /* stale entry at/after index */ |
| 975 | int index; /* insertion index */ |
| 976 | int keepstale; /* source index of kept stale */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | int lowstale; /* stale entry before index */ |
| 978 | int newindex=0; /* new insertion index */ |
| 979 | int to; /* destination copy index */ |
| 980 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 981 | ASSERT(leafhdr->stale > 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | index = *indexp; |
Christoph Hellwig | a230a1d | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 983 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 984 | xfs_dir3_leaf_find_stale(leafhdr, ents, index, &lowstale, &highstale); |
Christoph Hellwig | a230a1d | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | /* |
| 987 | * Pick the better of lowstale and highstale. |
| 988 | */ |
| 989 | if (lowstale >= 0 && |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 990 | (highstale == leafhdr->count || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | index - lowstale <= highstale - index)) |
| 992 | keepstale = lowstale; |
| 993 | else |
| 994 | keepstale = highstale; |
| 995 | /* |
| 996 | * Copy the entries in place, removing all the stale entries |
| 997 | * except keepstale. |
| 998 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 999 | for (from = to = 0; from < leafhdr->count; from++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | /* |
| 1001 | * Notice the new value of index. |
| 1002 | */ |
| 1003 | if (index == from) |
| 1004 | newindex = to; |
| 1005 | if (from != keepstale && |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1006 | ents[from].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | if (from == to) |
| 1008 | *lowlogp = to; |
| 1009 | continue; |
| 1010 | } |
| 1011 | /* |
| 1012 | * Record the new keepstale value for the insertion. |
| 1013 | */ |
| 1014 | if (from == keepstale) |
| 1015 | lowstale = highstale = to; |
| 1016 | /* |
| 1017 | * Copy only the entries that have moved. |
| 1018 | */ |
| 1019 | if (from > to) |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1020 | ents[to] = ents[from]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | to++; |
| 1022 | } |
| 1023 | ASSERT(from > to); |
| 1024 | /* |
| 1025 | * If the insertion point was past the last entry, |
| 1026 | * set the new insertion point accordingly. |
| 1027 | */ |
| 1028 | if (index == from) |
| 1029 | newindex = to; |
| 1030 | *indexp = newindex; |
| 1031 | /* |
| 1032 | * Adjust the leaf header values. |
| 1033 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1034 | leafhdr->count -= from - to; |
| 1035 | leafhdr->stale = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | /* |
| 1037 | * Remember the low/high stale value only in the "right" |
| 1038 | * direction. |
| 1039 | */ |
| 1040 | if (lowstale >= newindex) |
| 1041 | lowstale = -1; |
| 1042 | else |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1043 | highstale = leafhdr->count; |
| 1044 | *highlogp = leafhdr->count - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | *lowstalep = lowstale; |
| 1046 | *highstalep = highstale; |
| 1047 | } |
| 1048 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | /* |
| 1050 | * Log the bests entries indicated from a leaf1 block. |
| 1051 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1052 | static void |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1053 | xfs_dir3_leaf_log_bests( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | xfs_trans_t *tp, /* transaction pointer */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1055 | struct xfs_buf *bp, /* leaf buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | int first, /* first entry to log */ |
| 1057 | int last) /* last entry to log */ |
| 1058 | { |
Nathan Scott | 68b3a10 | 2006-03-17 17:27:19 +1100 | [diff] [blame] | 1059 | __be16 *firstb; /* pointer to first entry */ |
| 1060 | __be16 *lastb; /* pointer to last entry */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1061 | struct xfs_dir2_leaf *leaf = bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ |
| 1063 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1064 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC) || |
| 1065 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC)); |
| 1066 | |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1067 | ltp = xfs_dir2_leaf_tail_p(tp->t_mountp, leaf); |
| 1068 | firstb = xfs_dir2_leaf_bests_p(ltp) + first; |
| 1069 | lastb = xfs_dir2_leaf_bests_p(ltp) + last; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1070 | xfs_trans_log_buf(tp, bp, (uint)((char *)firstb - (char *)leaf), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | (uint)((char *)lastb - (char *)leaf + sizeof(*lastb) - 1)); |
| 1072 | } |
| 1073 | |
| 1074 | /* |
| 1075 | * Log the leaf entries indicated from a leaf1 or leafn block. |
| 1076 | */ |
| 1077 | void |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1078 | xfs_dir3_leaf_log_ents( |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1079 | struct xfs_trans *tp, |
| 1080 | struct xfs_inode *dp, |
| 1081 | struct xfs_buf *bp, |
| 1082 | int first, |
| 1083 | int last) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | { |
| 1085 | xfs_dir2_leaf_entry_t *firstlep; /* pointer to first entry */ |
| 1086 | xfs_dir2_leaf_entry_t *lastlep; /* pointer to last entry */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1087 | struct xfs_dir2_leaf *leaf = bp->b_addr; |
| 1088 | struct xfs_dir2_leaf_entry *ents; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1090 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC) || |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1091 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) || |
| 1092 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) || |
| 1093 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)); |
| 1094 | |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1095 | ents = dp->d_ops->leaf_ents_p(leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1096 | firstlep = &ents[first]; |
| 1097 | lastlep = &ents[last]; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1098 | xfs_trans_log_buf(tp, bp, (uint)((char *)firstlep - (char *)leaf), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | (uint)((char *)lastlep - (char *)leaf + sizeof(*lastlep) - 1)); |
| 1100 | } |
| 1101 | |
| 1102 | /* |
| 1103 | * Log the header of the leaf1 or leafn block. |
| 1104 | */ |
| 1105 | void |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1106 | xfs_dir3_leaf_log_header( |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1107 | struct xfs_trans *tp, |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1108 | struct xfs_inode *dp, |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1109 | struct xfs_buf *bp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1111 | struct xfs_dir2_leaf *leaf = bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1113 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC) || |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1114 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) || |
| 1115 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) || |
| 1116 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)); |
| 1117 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1118 | xfs_trans_log_buf(tp, bp, (uint)((char *)&leaf->hdr - (char *)leaf), |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 1119 | dp->d_ops->leaf_hdr_size - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | } |
| 1121 | |
| 1122 | /* |
| 1123 | * Log the tail of the leaf1 block. |
| 1124 | */ |
Christoph Hellwig | ba0f32d | 2005-06-21 15:36:52 +1000 | [diff] [blame] | 1125 | STATIC void |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1126 | xfs_dir3_leaf_log_tail( |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1127 | struct xfs_trans *tp, |
| 1128 | struct xfs_buf *bp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1130 | struct xfs_dir2_leaf *leaf = bp->b_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1132 | struct xfs_mount *mp = tp->t_mountp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1134 | ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC) || |
| 1135 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) || |
| 1136 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) || |
| 1137 | leaf->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)); |
| 1138 | |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1139 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1140 | xfs_trans_log_buf(tp, bp, (uint)((char *)ltp - (char *)leaf), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | (uint)(mp->m_dirblksize - 1)); |
| 1142 | } |
| 1143 | |
| 1144 | /* |
| 1145 | * Look up the entry referred to by args in the leaf format directory. |
| 1146 | * Most of the work is done by the xfs_dir2_leaf_lookup_int routine which |
| 1147 | * is also used by the node-format code. |
| 1148 | */ |
| 1149 | int |
| 1150 | xfs_dir2_leaf_lookup( |
| 1151 | xfs_da_args_t *args) /* operation arguments */ |
| 1152 | { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1153 | struct xfs_buf *dbp; /* data block buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | xfs_dir2_data_entry_t *dep; /* data block entry */ |
| 1155 | xfs_inode_t *dp; /* incore directory inode */ |
| 1156 | int error; /* error return code */ |
| 1157 | int index; /* found entry index */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1158 | struct xfs_buf *lbp; /* leaf buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 1160 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ |
| 1161 | xfs_trans_t *tp; /* transaction pointer */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1162 | struct xfs_dir2_leaf_entry *ents; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1164 | trace_xfs_dir2_leaf_lookup(args); |
| 1165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | /* |
| 1167 | * Look up name in the leaf block, returning both buffers and index. |
| 1168 | */ |
| 1169 | if ((error = xfs_dir2_leaf_lookup_int(args, &lbp, &index, &dbp))) { |
| 1170 | return error; |
| 1171 | } |
| 1172 | tp = args->trans; |
| 1173 | dp = args->dp; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1174 | xfs_dir3_leaf_check(dp, lbp); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1175 | leaf = lbp->b_addr; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1176 | ents = dp->d_ops->leaf_ents_p(leaf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | /* |
| 1178 | * Get to the leaf entry and contained data entry address. |
| 1179 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1180 | lep = &ents[index]; |
| 1181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | /* |
| 1183 | * Point to the data entry. |
| 1184 | */ |
| 1185 | dep = (xfs_dir2_data_entry_t *) |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1186 | ((char *)dbp->b_addr + |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1187 | xfs_dir2_dataptr_to_off(dp->i_mount, be32_to_cpu(lep->address))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | /* |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1189 | * Return the found inode number & CI name if appropriate |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | */ |
Christoph Hellwig | ff9901c | 2006-06-09 14:48:37 +1000 | [diff] [blame] | 1191 | args->inumber = be64_to_cpu(dep->inumber); |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 1192 | args->filetype = dp->d_ops->data_get_ftype(dep); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1193 | error = xfs_dir_cilookup_result(args, dep->name, dep->namelen); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1194 | xfs_trans_brelse(tp, dbp); |
| 1195 | xfs_trans_brelse(tp, lbp); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1196 | return XFS_ERROR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | } |
| 1198 | |
| 1199 | /* |
| 1200 | * Look up name/hash in the leaf block. |
| 1201 | * Fill in indexp with the found index, and dbpp with the data buffer. |
| 1202 | * If not found dbpp will be NULL, and ENOENT comes back. |
| 1203 | * lbpp will always be filled in with the leaf buffer unless there's an error. |
| 1204 | */ |
| 1205 | static int /* error */ |
| 1206 | xfs_dir2_leaf_lookup_int( |
| 1207 | xfs_da_args_t *args, /* operation arguments */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1208 | struct xfs_buf **lbpp, /* out: leaf buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | int *indexp, /* out: index in leaf block */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1210 | struct xfs_buf **dbpp) /* out: data buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | { |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1212 | xfs_dir2_db_t curdb = -1; /* current data block number */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1213 | struct xfs_buf *dbp = NULL; /* data buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | xfs_dir2_data_entry_t *dep; /* data entry */ |
| 1215 | xfs_inode_t *dp; /* incore directory inode */ |
| 1216 | int error; /* error return code */ |
| 1217 | int index; /* index in leaf block */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1218 | struct xfs_buf *lbp; /* leaf buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ |
| 1220 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 1221 | xfs_mount_t *mp; /* filesystem mount point */ |
| 1222 | xfs_dir2_db_t newdb; /* new data block number */ |
| 1223 | xfs_trans_t *tp; /* transaction pointer */ |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1224 | xfs_dir2_db_t cidb = -1; /* case match data block no. */ |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1225 | enum xfs_dacmp cmp; /* name compare result */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1226 | struct xfs_dir2_leaf_entry *ents; |
| 1227 | struct xfs_dir3_icleaf_hdr leafhdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | |
| 1229 | dp = args->dp; |
| 1230 | tp = args->trans; |
| 1231 | mp = dp->i_mount; |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 1232 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1233 | error = xfs_dir3_leaf_read(tp, dp, mp->m_dirleafblk, -1, &lbp); |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1234 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | return error; |
Dave Chinner | e6f7667 | 2012-11-12 22:54:15 +1100 | [diff] [blame] | 1236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | *lbpp = lbp; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1238 | leaf = lbp->b_addr; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1239 | xfs_dir3_leaf_check(dp, lbp); |
| 1240 | ents = dp->d_ops->leaf_ents_p(leaf); |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1241 | dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | /* |
| 1244 | * Look for the first leaf entry with our hash value. |
| 1245 | */ |
| 1246 | index = xfs_dir2_leaf_search_hash(args, lbp); |
| 1247 | /* |
| 1248 | * Loop over all the entries with the right hash value |
| 1249 | * looking to match the name. |
| 1250 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1251 | for (lep = &ents[index]; |
| 1252 | index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval; |
| 1253 | lep++, index++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | /* |
| 1255 | * Skip over stale leaf entries. |
| 1256 | */ |
Nathan Scott | 3c1f9c1 | 2006-03-17 17:28:18 +1100 | [diff] [blame] | 1257 | if (be32_to_cpu(lep->address) == XFS_DIR2_NULL_DATAPTR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | continue; |
| 1259 | /* |
| 1260 | * Get the new data block number. |
| 1261 | */ |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1262 | newdb = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | /* |
| 1264 | * If it's not the same as the old data block number, |
| 1265 | * need to pitch the old one and read the new one. |
| 1266 | */ |
| 1267 | if (newdb != curdb) { |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1268 | if (dbp) |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1269 | xfs_trans_brelse(tp, dbp); |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1270 | error = xfs_dir3_data_read(tp, dp, |
Dave Chinner | e481357 | 2012-11-12 22:54:14 +1100 | [diff] [blame] | 1271 | xfs_dir2_db_to_da(mp, newdb), |
| 1272 | -1, &dbp); |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1273 | if (error) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1274 | xfs_trans_brelse(tp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | return error; |
| 1276 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | curdb = newdb; |
| 1278 | } |
| 1279 | /* |
| 1280 | * Point to the data entry. |
| 1281 | */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1282 | dep = (xfs_dir2_data_entry_t *)((char *)dbp->b_addr + |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1283 | xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | /* |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1285 | * Compare name and if it's an exact match, return the index |
| 1286 | * and buffer. If it's the first case-insensitive match, store |
| 1287 | * the index and buffer and continue looking for an exact match. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | */ |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1289 | cmp = mp->m_dirnameops->compname(args, dep->name, dep->namelen); |
| 1290 | if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) { |
| 1291 | args->cmpresult = cmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | *indexp = index; |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1293 | /* case exact match: return the current buffer. */ |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1294 | if (cmp == XFS_CMP_EXACT) { |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1295 | *dbpp = dbp; |
| 1296 | return 0; |
| 1297 | } |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1298 | cidb = curdb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | } |
| 1300 | } |
Barry Naujok | 6a17810 | 2008-05-21 16:42:05 +1000 | [diff] [blame] | 1301 | ASSERT(args->op_flags & XFS_DA_OP_OKNOENT); |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1302 | /* |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1303 | * Here, we can only be doing a lookup (not a rename or remove). |
| 1304 | * If a case-insensitive match was found earlier, re-read the |
| 1305 | * appropriate data block if required and return it. |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1306 | */ |
| 1307 | if (args->cmpresult == XFS_CMP_CASE) { |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1308 | ASSERT(cidb != -1); |
| 1309 | if (cidb != curdb) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1310 | xfs_trans_brelse(tp, dbp); |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1311 | error = xfs_dir3_data_read(tp, dp, |
Dave Chinner | e481357 | 2012-11-12 22:54:14 +1100 | [diff] [blame] | 1312 | xfs_dir2_db_to_da(mp, cidb), |
| 1313 | -1, &dbp); |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1314 | if (error) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1315 | xfs_trans_brelse(tp, lbp); |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1316 | return error; |
| 1317 | } |
| 1318 | } |
| 1319 | *dbpp = dbp; |
Barry Naujok | 5163f95 | 2008-05-21 16:41:01 +1000 | [diff] [blame] | 1320 | return 0; |
| 1321 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | /* |
| 1323 | * No match found, return ENOENT. |
| 1324 | */ |
Barry Naujok | 07fe4dd | 2008-06-27 13:32:11 +1000 | [diff] [blame] | 1325 | ASSERT(cidb == -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | if (dbp) |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1327 | xfs_trans_brelse(tp, dbp); |
| 1328 | xfs_trans_brelse(tp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | return XFS_ERROR(ENOENT); |
| 1330 | } |
| 1331 | |
| 1332 | /* |
| 1333 | * Remove an entry from a leaf format directory. |
| 1334 | */ |
| 1335 | int /* error */ |
| 1336 | xfs_dir2_leaf_removename( |
| 1337 | xfs_da_args_t *args) /* operation arguments */ |
| 1338 | { |
Nathan Scott | 68b3a10 | 2006-03-17 17:27:19 +1100 | [diff] [blame] | 1339 | __be16 *bestsp; /* leaf block best freespace */ |
Christoph Hellwig | c2066e2 | 2011-07-08 14:35:38 +0200 | [diff] [blame] | 1340 | xfs_dir2_data_hdr_t *hdr; /* data block header */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | xfs_dir2_db_t db; /* data block number */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1342 | struct xfs_buf *dbp; /* data block buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | xfs_dir2_data_entry_t *dep; /* data entry structure */ |
| 1344 | xfs_inode_t *dp; /* incore directory inode */ |
| 1345 | int error; /* error return code */ |
| 1346 | xfs_dir2_db_t i; /* temporary data block # */ |
| 1347 | int index; /* index into leaf entries */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1348 | struct xfs_buf *lbp; /* leaf buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 1350 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ |
| 1351 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ |
| 1352 | xfs_mount_t *mp; /* filesystem mount point */ |
| 1353 | int needlog; /* need to log data header */ |
| 1354 | int needscan; /* need to rescan data frees */ |
| 1355 | xfs_dir2_data_off_t oldbest; /* old value of best free */ |
| 1356 | xfs_trans_t *tp; /* transaction pointer */ |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1357 | struct xfs_dir2_data_free *bf; /* bestfree table */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1358 | struct xfs_dir2_leaf_entry *ents; |
| 1359 | struct xfs_dir3_icleaf_hdr leafhdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1361 | trace_xfs_dir2_leaf_removename(args); |
| 1362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | /* |
| 1364 | * Lookup the leaf entry, get the leaf and data blocks read in. |
| 1365 | */ |
| 1366 | if ((error = xfs_dir2_leaf_lookup_int(args, &lbp, &index, &dbp))) { |
| 1367 | return error; |
| 1368 | } |
| 1369 | dp = args->dp; |
| 1370 | tp = args->trans; |
| 1371 | mp = dp->i_mount; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1372 | leaf = lbp->b_addr; |
| 1373 | hdr = dbp->b_addr; |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1374 | xfs_dir3_data_check(dp, dbp); |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 1375 | bf = dp->d_ops->data_bestfree_p(hdr); |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1376 | dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1377 | ents = dp->d_ops->leaf_ents_p(leaf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | /* |
| 1379 | * Point to the leaf entry, use that to point to the data entry. |
| 1380 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1381 | lep = &ents[index]; |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1382 | db = xfs_dir2_dataptr_to_db(mp, be32_to_cpu(lep->address)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | dep = (xfs_dir2_data_entry_t *) |
Christoph Hellwig | c2066e2 | 2011-07-08 14:35:38 +0200 | [diff] [blame] | 1384 | ((char *)hdr + xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | needscan = needlog = 0; |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1386 | oldbest = be16_to_cpu(bf[0].length); |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1387 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
| 1388 | bestsp = xfs_dir2_leaf_bests_p(ltp); |
Nathan Scott | 68b3a10 | 2006-03-17 17:27:19 +1100 | [diff] [blame] | 1389 | ASSERT(be16_to_cpu(bestsp[db]) == oldbest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | /* |
| 1391 | * Mark the former data entry unused. |
| 1392 | */ |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 1393 | xfs_dir2_data_make_free(tp, dp, dbp, |
Christoph Hellwig | c2066e2 | 2011-07-08 14:35:38 +0200 | [diff] [blame] | 1394 | (xfs_dir2_data_aoff_t)((char *)dep - (char *)hdr), |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 1395 | dp->d_ops->data_entsize(dep->namelen), &needlog, &needscan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | /* |
| 1397 | * We just mark the leaf entry stale by putting a null in it. |
| 1398 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1399 | leafhdr.stale++; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1400 | dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1401 | xfs_dir3_leaf_log_header(tp, dp, lbp); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1402 | |
Nathan Scott | 3c1f9c1 | 2006-03-17 17:28:18 +1100 | [diff] [blame] | 1403 | lep->address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1404 | xfs_dir3_leaf_log_ents(tp, dp, lbp, index, index); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | /* |
| 1407 | * Scan the freespace in the data block again if necessary, |
| 1408 | * log the data block header if necessary. |
| 1409 | */ |
| 1410 | if (needscan) |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 1411 | xfs_dir2_data_freescan(dp, hdr, &needlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | if (needlog) |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 1413 | xfs_dir2_data_log_header(tp, dp, dbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | /* |
| 1415 | * If the longest freespace in the data block has changed, |
| 1416 | * put the new value in the bests table and log that. |
| 1417 | */ |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1418 | if (be16_to_cpu(bf[0].length) != oldbest) { |
| 1419 | bestsp[db] = bf[0].length; |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1420 | xfs_dir3_leaf_log_bests(tp, lbp, db, db); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | } |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1422 | xfs_dir3_data_check(dp, dbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | /* |
| 1424 | * If the data block is now empty then get rid of the data block. |
| 1425 | */ |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1426 | if (be16_to_cpu(bf[0].length) == |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 1427 | mp->m_dirblksize - dp->d_ops->data_entry_offset) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | ASSERT(db != mp->m_dirdatablk); |
| 1429 | if ((error = xfs_dir2_shrink_inode(args, db, dbp))) { |
| 1430 | /* |
| 1431 | * Nope, can't get rid of it because it caused |
| 1432 | * allocation of a bmap btree block to do so. |
| 1433 | * Just go on, returning success, leaving the |
| 1434 | * empty block in place. |
| 1435 | */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1436 | if (error == ENOSPC && args->total == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | error = 0; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1438 | xfs_dir3_leaf_check(dp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | return error; |
| 1440 | } |
| 1441 | dbp = NULL; |
| 1442 | /* |
| 1443 | * If this is the last data block then compact the |
| 1444 | * bests table by getting rid of entries. |
| 1445 | */ |
Nathan Scott | afbcb3f | 2006-03-17 17:27:28 +1100 | [diff] [blame] | 1446 | if (db == be32_to_cpu(ltp->bestcount) - 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | /* |
| 1448 | * Look for the last active entry (i). |
| 1449 | */ |
| 1450 | for (i = db - 1; i > 0; i--) { |
Christoph Hellwig | 69ef921 | 2011-07-08 14:36:05 +0200 | [diff] [blame] | 1451 | if (bestsp[i] != cpu_to_be16(NULLDATAOFF)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | break; |
| 1453 | } |
| 1454 | /* |
| 1455 | * Copy the table down so inactive entries at the |
| 1456 | * end are removed. |
| 1457 | */ |
| 1458 | memmove(&bestsp[db - i], bestsp, |
Nathan Scott | afbcb3f | 2006-03-17 17:27:28 +1100 | [diff] [blame] | 1459 | (be32_to_cpu(ltp->bestcount) - (db - i)) * sizeof(*bestsp)); |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 1460 | be32_add_cpu(<p->bestcount, -(db - i)); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1461 | xfs_dir3_leaf_log_tail(tp, lbp); |
| 1462 | xfs_dir3_leaf_log_bests(tp, lbp, 0, be32_to_cpu(ltp->bestcount) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | } else |
Nathan Scott | 68b3a10 | 2006-03-17 17:27:19 +1100 | [diff] [blame] | 1464 | bestsp[db] = cpu_to_be16(NULLDATAOFF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | } |
| 1466 | /* |
| 1467 | * If the data block was not the first one, drop it. |
| 1468 | */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1469 | else if (db != mp->m_dirdatablk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | dbp = NULL; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1471 | |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1472 | xfs_dir3_leaf_check(dp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | /* |
| 1474 | * See if we can convert to block form. |
| 1475 | */ |
| 1476 | return xfs_dir2_leaf_to_block(args, lbp, dbp); |
| 1477 | } |
| 1478 | |
| 1479 | /* |
| 1480 | * Replace the inode number in a leaf format directory entry. |
| 1481 | */ |
| 1482 | int /* error */ |
| 1483 | xfs_dir2_leaf_replace( |
| 1484 | xfs_da_args_t *args) /* operation arguments */ |
| 1485 | { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1486 | struct xfs_buf *dbp; /* data block buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | xfs_dir2_data_entry_t *dep; /* data block entry */ |
| 1488 | xfs_inode_t *dp; /* incore directory inode */ |
| 1489 | int error; /* error return code */ |
| 1490 | int index; /* index of leaf entry */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1491 | struct xfs_buf *lbp; /* leaf buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 1493 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ |
| 1494 | xfs_trans_t *tp; /* transaction pointer */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1495 | struct xfs_dir2_leaf_entry *ents; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1497 | trace_xfs_dir2_leaf_replace(args); |
| 1498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | /* |
| 1500 | * Look up the entry. |
| 1501 | */ |
| 1502 | if ((error = xfs_dir2_leaf_lookup_int(args, &lbp, &index, &dbp))) { |
| 1503 | return error; |
| 1504 | } |
| 1505 | dp = args->dp; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1506 | leaf = lbp->b_addr; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1507 | ents = dp->d_ops->leaf_ents_p(leaf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | /* |
| 1509 | * Point to the leaf entry, get data address from it. |
| 1510 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1511 | lep = &ents[index]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | /* |
| 1513 | * Point to the data entry. |
| 1514 | */ |
| 1515 | dep = (xfs_dir2_data_entry_t *) |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1516 | ((char *)dbp->b_addr + |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1517 | xfs_dir2_dataptr_to_off(dp->i_mount, be32_to_cpu(lep->address))); |
Christoph Hellwig | ff9901c | 2006-06-09 14:48:37 +1000 | [diff] [blame] | 1518 | ASSERT(args->inumber != be64_to_cpu(dep->inumber)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | /* |
| 1520 | * Put the new inode number in, log it. |
| 1521 | */ |
Christoph Hellwig | ff9901c | 2006-06-09 14:48:37 +1000 | [diff] [blame] | 1522 | dep->inumber = cpu_to_be64(args->inumber); |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 1523 | dp->d_ops->data_put_ftype(dep, args->filetype); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | tp = args->trans; |
Dave Chinner | 9d23fc8 | 2013-10-29 22:11:48 +1100 | [diff] [blame] | 1525 | xfs_dir2_data_log_entry(tp, dp, dbp, dep); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1526 | xfs_dir3_leaf_check(dp, lbp); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1527 | xfs_trans_brelse(tp, lbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | return 0; |
| 1529 | } |
| 1530 | |
| 1531 | /* |
| 1532 | * Return index in the leaf block (lbp) which is either the first |
| 1533 | * one with this hash value, or if there are none, the insert point |
| 1534 | * for that hash value. |
| 1535 | */ |
| 1536 | int /* index value */ |
| 1537 | xfs_dir2_leaf_search_hash( |
| 1538 | xfs_da_args_t *args, /* operation arguments */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1539 | struct xfs_buf *lbp) /* leaf buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | { |
| 1541 | xfs_dahash_t hash=0; /* hash from this entry */ |
| 1542 | xfs_dahash_t hashwant; /* hash value looking for */ |
| 1543 | int high; /* high leaf index */ |
| 1544 | int low; /* low leaf index */ |
| 1545 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 1546 | xfs_dir2_leaf_entry_t *lep; /* leaf entry */ |
| 1547 | int mid=0; /* current leaf index */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1548 | struct xfs_dir2_leaf_entry *ents; |
| 1549 | struct xfs_dir3_icleaf_hdr leafhdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1551 | leaf = lbp->b_addr; |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1552 | ents = args->dp->d_ops->leaf_ents_p(leaf); |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1553 | args->dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1554 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1555 | /* |
| 1556 | * Note, the table cannot be empty, so we have to go through the loop. |
| 1557 | * Binary search the leaf entries looking for our hash value. |
| 1558 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1559 | for (lep = ents, low = 0, high = leafhdr.count - 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | hashwant = args->hashval; |
| 1561 | low <= high; ) { |
| 1562 | mid = (low + high) >> 1; |
Nathan Scott | 3c1f9c1 | 2006-03-17 17:28:18 +1100 | [diff] [blame] | 1563 | if ((hash = be32_to_cpu(lep[mid].hashval)) == hashwant) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | break; |
| 1565 | if (hash < hashwant) |
| 1566 | low = mid + 1; |
| 1567 | else |
| 1568 | high = mid - 1; |
| 1569 | } |
| 1570 | /* |
| 1571 | * Found one, back up through all the equal hash values. |
| 1572 | */ |
| 1573 | if (hash == hashwant) { |
Nathan Scott | 3c1f9c1 | 2006-03-17 17:28:18 +1100 | [diff] [blame] | 1574 | while (mid > 0 && be32_to_cpu(lep[mid - 1].hashval) == hashwant) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | mid--; |
| 1576 | } |
| 1577 | } |
| 1578 | /* |
| 1579 | * Need to point to an entry higher than ours. |
| 1580 | */ |
| 1581 | else if (hash < hashwant) |
| 1582 | mid++; |
| 1583 | return mid; |
| 1584 | } |
| 1585 | |
| 1586 | /* |
| 1587 | * Trim off a trailing data block. We know it's empty since the leaf |
| 1588 | * freespace table says so. |
| 1589 | */ |
| 1590 | int /* error */ |
| 1591 | xfs_dir2_leaf_trim_data( |
| 1592 | xfs_da_args_t *args, /* operation arguments */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1593 | struct xfs_buf *lbp, /* leaf buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | xfs_dir2_db_t db) /* data block number */ |
| 1595 | { |
Nathan Scott | 68b3a10 | 2006-03-17 17:27:19 +1100 | [diff] [blame] | 1596 | __be16 *bestsp; /* leaf bests table */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1597 | struct xfs_buf *dbp; /* data block buffer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | xfs_inode_t *dp; /* incore directory inode */ |
| 1599 | int error; /* error return value */ |
| 1600 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 1601 | xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */ |
| 1602 | xfs_mount_t *mp; /* filesystem mount point */ |
| 1603 | xfs_trans_t *tp; /* transaction pointer */ |
| 1604 | |
| 1605 | dp = args->dp; |
| 1606 | mp = dp->i_mount; |
| 1607 | tp = args->trans; |
| 1608 | /* |
| 1609 | * Read the offending data block. We need its buffer. |
| 1610 | */ |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1611 | error = xfs_dir3_data_read(tp, dp, xfs_dir2_db_to_da(mp, db), -1, &dbp); |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 1612 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1615 | leaf = lbp->b_addr; |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1616 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
Christoph Hellwig | c2066e2 | 2011-07-08 14:35:38 +0200 | [diff] [blame] | 1617 | |
| 1618 | #ifdef DEBUG |
| 1619 | { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1620 | struct xfs_dir2_data_hdr *hdr = dbp->b_addr; |
Dave Chinner | 2ca9877 | 2013-10-29 22:11:49 +1100 | [diff] [blame] | 1621 | struct xfs_dir2_data_free *bf = dp->d_ops->data_bestfree_p(hdr); |
Christoph Hellwig | c2066e2 | 2011-07-08 14:35:38 +0200 | [diff] [blame] | 1622 | |
Dave Chinner | 33363fe | 2013-04-03 16:11:22 +1100 | [diff] [blame] | 1623 | ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) || |
| 1624 | hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC)); |
| 1625 | ASSERT(be16_to_cpu(bf[0].length) == |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 1626 | mp->m_dirblksize - dp->d_ops->data_entry_offset); |
Nathan Scott | afbcb3f | 2006-03-17 17:27:28 +1100 | [diff] [blame] | 1627 | ASSERT(db == be32_to_cpu(ltp->bestcount) - 1); |
Christoph Hellwig | c2066e2 | 2011-07-08 14:35:38 +0200 | [diff] [blame] | 1628 | } |
| 1629 | #endif |
| 1630 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | /* |
| 1632 | * Get rid of the data block. |
| 1633 | */ |
| 1634 | if ((error = xfs_dir2_shrink_inode(args, db, dbp))) { |
| 1635 | ASSERT(error != ENOSPC); |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1636 | xfs_trans_brelse(tp, dbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | return error; |
| 1638 | } |
| 1639 | /* |
| 1640 | * Eliminate the last bests entry from the table. |
| 1641 | */ |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1642 | bestsp = xfs_dir2_leaf_bests_p(ltp); |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 1643 | be32_add_cpu(<p->bestcount, -1); |
Nathan Scott | afbcb3f | 2006-03-17 17:27:28 +1100 | [diff] [blame] | 1644 | memmove(&bestsp[1], &bestsp[0], be32_to_cpu(ltp->bestcount) * sizeof(*bestsp)); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1645 | xfs_dir3_leaf_log_tail(tp, lbp); |
| 1646 | xfs_dir3_leaf_log_bests(tp, lbp, 0, be32_to_cpu(ltp->bestcount) - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | return 0; |
| 1648 | } |
| 1649 | |
Christoph Hellwig | 2282396 | 2011-07-08 14:35:53 +0200 | [diff] [blame] | 1650 | static inline size_t |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1651 | xfs_dir3_leaf_size( |
| 1652 | struct xfs_dir3_icleaf_hdr *hdr, |
Christoph Hellwig | 2282396 | 2011-07-08 14:35:53 +0200 | [diff] [blame] | 1653 | int counts) |
| 1654 | { |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1655 | int entries; |
| 1656 | int hdrsize; |
Christoph Hellwig | 2282396 | 2011-07-08 14:35:53 +0200 | [diff] [blame] | 1657 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1658 | entries = hdr->count - hdr->stale; |
| 1659 | if (hdr->magic == XFS_DIR2_LEAF1_MAGIC || |
| 1660 | hdr->magic == XFS_DIR2_LEAFN_MAGIC) |
| 1661 | hdrsize = sizeof(struct xfs_dir2_leaf_hdr); |
| 1662 | else |
| 1663 | hdrsize = sizeof(struct xfs_dir3_leaf_hdr); |
| 1664 | |
| 1665 | return hdrsize + entries * sizeof(xfs_dir2_leaf_entry_t) |
| 1666 | + counts * sizeof(xfs_dir2_data_off_t) |
| 1667 | + sizeof(xfs_dir2_leaf_tail_t); |
Christoph Hellwig | 2282396 | 2011-07-08 14:35:53 +0200 | [diff] [blame] | 1668 | } |
| 1669 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | /* |
| 1671 | * Convert node form directory to leaf form directory. |
| 1672 | * The root of the node form dir needs to already be a LEAFN block. |
| 1673 | * Just return if we can't do anything. |
| 1674 | */ |
| 1675 | int /* error */ |
| 1676 | xfs_dir2_node_to_leaf( |
| 1677 | xfs_da_state_t *state) /* directory operation state */ |
| 1678 | { |
| 1679 | xfs_da_args_t *args; /* operation arguments */ |
| 1680 | xfs_inode_t *dp; /* incore directory inode */ |
| 1681 | int error; /* error return code */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1682 | struct xfs_buf *fbp; /* buffer for freespace block */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | xfs_fileoff_t fo; /* freespace file offset */ |
| 1684 | xfs_dir2_free_t *free; /* freespace structure */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1685 | struct xfs_buf *lbp; /* buffer for leaf block */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | xfs_dir2_leaf_tail_t *ltp; /* tail of leaf structure */ |
| 1687 | xfs_dir2_leaf_t *leaf; /* leaf structure */ |
| 1688 | xfs_mount_t *mp; /* filesystem mount point */ |
| 1689 | int rval; /* successful free trim? */ |
| 1690 | xfs_trans_t *tp; /* transaction pointer */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1691 | struct xfs_dir3_icleaf_hdr leafhdr; |
Dave Chinner | cbc8adf | 2013-04-03 16:11:21 +1100 | [diff] [blame] | 1692 | struct xfs_dir3_icfree_hdr freehdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | |
| 1694 | /* |
| 1695 | * There's more than a leaf level in the btree, so there must |
| 1696 | * be multiple leafn blocks. Give up. |
| 1697 | */ |
| 1698 | if (state->path.active > 1) |
| 1699 | return 0; |
| 1700 | args = state->args; |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 1701 | |
| 1702 | trace_xfs_dir2_node_to_leaf(args); |
| 1703 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | mp = state->mp; |
| 1705 | dp = args->dp; |
| 1706 | tp = args->trans; |
| 1707 | /* |
| 1708 | * Get the last offset in the file. |
| 1709 | */ |
| 1710 | if ((error = xfs_bmap_last_offset(tp, dp, &fo, XFS_DATA_FORK))) { |
| 1711 | return error; |
| 1712 | } |
| 1713 | fo -= mp->m_dirblkfsbs; |
| 1714 | /* |
| 1715 | * If there are freespace blocks other than the first one, |
| 1716 | * take this opportunity to remove trailing empty freespace blocks |
| 1717 | * that may have been left behind during no-space-reservation |
| 1718 | * operations. |
| 1719 | */ |
| 1720 | while (fo > mp->m_dirfreeblk) { |
| 1721 | if ((error = xfs_dir2_node_trim_free(args, fo, &rval))) { |
| 1722 | return error; |
| 1723 | } |
| 1724 | if (rval) |
| 1725 | fo -= mp->m_dirblkfsbs; |
| 1726 | else |
| 1727 | return 0; |
| 1728 | } |
| 1729 | /* |
| 1730 | * Now find the block just before the freespace block. |
| 1731 | */ |
| 1732 | if ((error = xfs_bmap_last_before(tp, dp, &fo, XFS_DATA_FORK))) { |
| 1733 | return error; |
| 1734 | } |
| 1735 | /* |
| 1736 | * If it's not the single leaf block, give up. |
| 1737 | */ |
| 1738 | if (XFS_FSB_TO_B(mp, fo) > XFS_DIR2_LEAF_OFFSET + mp->m_dirblksize) |
| 1739 | return 0; |
| 1740 | lbp = state->path.blk[0].bp; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1741 | leaf = lbp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1742 | dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1743 | |
| 1744 | ASSERT(leafhdr.magic == XFS_DIR2_LEAFN_MAGIC || |
| 1745 | leafhdr.magic == XFS_DIR3_LEAFN_MAGIC); |
| 1746 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | /* |
| 1748 | * Read the freespace block. |
| 1749 | */ |
Dave Chinner | 2025207 | 2012-11-12 22:54:13 +1100 | [diff] [blame] | 1750 | error = xfs_dir2_free_read(tp, dp, mp->m_dirfreeblk, &fbp); |
Dave Chinner | 4bb20a8 | 2012-11-12 22:54:10 +1100 | [diff] [blame] | 1751 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | return error; |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1753 | free = fbp->b_addr; |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1754 | dp->d_ops->free_hdr_from_disk(&freehdr, free); |
Dave Chinner | cbc8adf | 2013-04-03 16:11:21 +1100 | [diff] [blame] | 1755 | |
| 1756 | ASSERT(!freehdr.firstdb); |
Christoph Hellwig | 2282396 | 2011-07-08 14:35:53 +0200 | [diff] [blame] | 1757 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | /* |
| 1759 | * Now see if the leafn and free data will fit in a leaf1. |
| 1760 | * If not, release the buffer and give up. |
| 1761 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1762 | if (xfs_dir3_leaf_size(&leafhdr, freehdr.nvalid) > mp->m_dirblksize) { |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 1763 | xfs_trans_brelse(tp, fbp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | return 0; |
| 1765 | } |
Christoph Hellwig | 2282396 | 2011-07-08 14:35:53 +0200 | [diff] [blame] | 1766 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1767 | /* |
| 1768 | * If the leaf has any stale entries in it, compress them out. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | */ |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1770 | if (leafhdr.stale) |
| 1771 | xfs_dir3_leaf_compact(args, &leafhdr, lbp); |
Dave Chinner | b0f539d | 2012-11-14 17:53:49 +1100 | [diff] [blame] | 1772 | |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1773 | lbp->b_ops = &xfs_dir3_leaf1_buf_ops; |
Dave Chinner | 61fe135 | 2013-04-03 16:11:30 +1100 | [diff] [blame] | 1774 | xfs_trans_buf_set_type(tp, lbp, XFS_BLFT_DIR_LEAF1_BUF); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1775 | leafhdr.magic = (leafhdr.magic == XFS_DIR2_LEAFN_MAGIC) |
| 1776 | ? XFS_DIR2_LEAF1_MAGIC |
| 1777 | : XFS_DIR3_LEAF1_MAGIC; |
Dave Chinner | b0f539d | 2012-11-14 17:53:49 +1100 | [diff] [blame] | 1778 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | /* |
| 1780 | * Set up the leaf tail from the freespace block. |
| 1781 | */ |
Christoph Hellwig | bbaaf53 | 2007-06-28 16:43:50 +1000 | [diff] [blame] | 1782 | ltp = xfs_dir2_leaf_tail_p(mp, leaf); |
Dave Chinner | cbc8adf | 2013-04-03 16:11:21 +1100 | [diff] [blame] | 1783 | ltp->bestcount = cpu_to_be32(freehdr.nvalid); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1784 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | /* |
| 1786 | * Set up the leaf bests table. |
| 1787 | */ |
Dave Chinner | 24dd0f5 | 2013-10-30 13:48:41 -0500 | [diff] [blame] | 1788 | memcpy(xfs_dir2_leaf_bests_p(ltp), dp->d_ops->free_bests_p(free), |
Dave Chinner | cbc8adf | 2013-04-03 16:11:21 +1100 | [diff] [blame] | 1789 | freehdr.nvalid * sizeof(xfs_dir2_data_off_t)); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1790 | |
Dave Chinner | 01ba43b | 2013-10-29 22:11:52 +1100 | [diff] [blame] | 1791 | dp->d_ops->leaf_hdr_to_disk(leaf, &leafhdr); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1792 | xfs_dir3_leaf_log_header(tp, dp, lbp); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1793 | xfs_dir3_leaf_log_bests(tp, lbp, 0, be32_to_cpu(ltp->bestcount) - 1); |
| 1794 | xfs_dir3_leaf_log_tail(tp, lbp); |
Dave Chinner | 4141956 | 2013-10-29 22:11:50 +1100 | [diff] [blame] | 1795 | xfs_dir3_leaf_check(dp, lbp); |
Dave Chinner | 24df33b | 2013-04-12 07:30:21 +1000 | [diff] [blame] | 1796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | /* |
| 1798 | * Get rid of the freespace block. |
| 1799 | */ |
| 1800 | error = xfs_dir2_shrink_inode(args, XFS_DIR2_FREE_FIRSTDB(mp), fbp); |
| 1801 | if (error) { |
| 1802 | /* |
| 1803 | * This can't fail here because it can only happen when |
| 1804 | * punching out the middle of an extent, and this is an |
| 1805 | * isolated block. |
| 1806 | */ |
| 1807 | ASSERT(error != ENOSPC); |
| 1808 | return error; |
| 1809 | } |
| 1810 | fbp = NULL; |
| 1811 | /* |
| 1812 | * Now see if we can convert the single-leaf directory |
| 1813 | * down to a block form directory. |
| 1814 | * This routine always kills the dabuf for the leaf, so |
| 1815 | * eliminate it from the path. |
| 1816 | */ |
| 1817 | error = xfs_dir2_leaf_to_block(args, lbp, NULL); |
| 1818 | state->path.blk[0].bp = NULL; |
| 1819 | return error; |
| 1820 | } |