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. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 19 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 21 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_trans.h" |
| 25 | #include "xfs_sb.h" |
| 26 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_dir2.h" |
| 28 | #include "xfs_dmapi.h" |
| 29 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 31 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_ialloc_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 33 | #include "xfs_dir2_sf.h" |
| 34 | #include "xfs_attr_sf.h" |
| 35 | #include "xfs_dinode.h" |
| 36 | #include "xfs_inode.h" |
| 37 | #include "xfs_inode_item.h" |
| 38 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_btree.h" |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 40 | #include "xfs_btree_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include "xfs_ialloc.h" |
| 42 | #include "xfs_itable.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include "xfs_bmap.h" |
| 44 | #include "xfs_error.h" |
| 45 | #include "xfs_quota.h" |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | * Determine the extent state. |
| 49 | */ |
| 50 | /* ARGSUSED */ |
| 51 | STATIC xfs_exntst_t |
| 52 | xfs_extent_state( |
| 53 | xfs_filblks_t blks, |
| 54 | int extent_flag) |
| 55 | { |
| 56 | if (extent_flag) { |
| 57 | ASSERT(blks != 0); /* saved for DMIG */ |
| 58 | return XFS_EXT_UNWRITTEN; |
| 59 | } |
| 60 | return XFS_EXT_NORM; |
| 61 | } |
| 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | /* |
| 64 | * Convert on-disk form of btree root to in-memory form. |
| 65 | */ |
| 66 | void |
| 67 | xfs_bmdr_to_bmbt( |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 68 | struct xfs_mount *mp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | xfs_bmdr_block_t *dblock, |
| 70 | int dblocklen, |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 71 | struct xfs_btree_block *rblock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | int rblocklen) |
| 73 | { |
| 74 | int dmxr; |
| 75 | xfs_bmbt_key_t *fkp; |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 76 | __be64 *fpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | xfs_bmbt_key_t *tkp; |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 78 | __be64 *tpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 80 | rblock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC); |
| 81 | rblock->bb_level = dblock->bb_level; |
| 82 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); |
| 83 | rblock->bb_numrecs = dblock->bb_numrecs; |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 84 | rblock->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO); |
| 85 | rblock->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 86 | dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0); |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 87 | fkp = XFS_BMDR_KEY_ADDR(dblock, 1); |
| 88 | tkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); |
| 89 | fpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 90 | tpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 91 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 93 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | * Convert a compressed bmap extent record to an uncompressed form. |
| 98 | * This code must be in sync with the routines xfs_bmbt_get_startoff, |
| 99 | * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state. |
| 100 | */ |
| 101 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 102 | STATIC_INLINE void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | __xfs_bmbt_get_all( |
| 104 | __uint64_t l0, |
| 105 | __uint64_t l1, |
| 106 | xfs_bmbt_irec_t *s) |
| 107 | { |
| 108 | int ext_flag; |
| 109 | xfs_exntst_t st; |
| 110 | |
| 111 | ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN)); |
| 112 | s->br_startoff = ((xfs_fileoff_t)l0 & |
| 113 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
| 114 | #if XFS_BIG_BLKNOS |
| 115 | s->br_startblock = (((xfs_fsblock_t)l0 & XFS_MASK64LO(9)) << 43) | |
| 116 | (((xfs_fsblock_t)l1) >> 21); |
| 117 | #else |
| 118 | #ifdef DEBUG |
| 119 | { |
| 120 | xfs_dfsbno_t b; |
| 121 | |
| 122 | b = (((xfs_dfsbno_t)l0 & XFS_MASK64LO(9)) << 43) | |
| 123 | (((xfs_dfsbno_t)l1) >> 21); |
| 124 | ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b)); |
| 125 | s->br_startblock = (xfs_fsblock_t)b; |
| 126 | } |
| 127 | #else /* !DEBUG */ |
| 128 | s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21); |
| 129 | #endif /* DEBUG */ |
| 130 | #endif /* XFS_BIG_BLKNOS */ |
| 131 | s->br_blockcount = (xfs_filblks_t)(l1 & XFS_MASK64LO(21)); |
| 132 | /* This is xfs_extent_state() in-line */ |
| 133 | if (ext_flag) { |
| 134 | ASSERT(s->br_blockcount != 0); /* saved for DMIG */ |
| 135 | st = XFS_EXT_UNWRITTEN; |
| 136 | } else |
| 137 | st = XFS_EXT_NORM; |
| 138 | s->br_state = st; |
| 139 | } |
| 140 | |
| 141 | void |
| 142 | xfs_bmbt_get_all( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 143 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | xfs_bmbt_irec_t *s) |
| 145 | { |
| 146 | __xfs_bmbt_get_all(r->l0, r->l1, s); |
| 147 | } |
| 148 | |
| 149 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | * Extract the blockcount field from an in memory bmap extent record. |
| 151 | */ |
| 152 | xfs_filblks_t |
| 153 | xfs_bmbt_get_blockcount( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 154 | xfs_bmbt_rec_host_t *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | { |
| 156 | return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21)); |
| 157 | } |
| 158 | |
| 159 | /* |
| 160 | * Extract the startblock field from an in memory bmap extent record. |
| 161 | */ |
| 162 | xfs_fsblock_t |
| 163 | xfs_bmbt_get_startblock( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 164 | xfs_bmbt_rec_host_t *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | { |
| 166 | #if XFS_BIG_BLKNOS |
| 167 | return (((xfs_fsblock_t)r->l0 & XFS_MASK64LO(9)) << 43) | |
| 168 | (((xfs_fsblock_t)r->l1) >> 21); |
| 169 | #else |
| 170 | #ifdef DEBUG |
| 171 | xfs_dfsbno_t b; |
| 172 | |
| 173 | b = (((xfs_dfsbno_t)r->l0 & XFS_MASK64LO(9)) << 43) | |
| 174 | (((xfs_dfsbno_t)r->l1) >> 21); |
| 175 | ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b)); |
| 176 | return (xfs_fsblock_t)b; |
| 177 | #else /* !DEBUG */ |
| 178 | return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21); |
| 179 | #endif /* DEBUG */ |
| 180 | #endif /* XFS_BIG_BLKNOS */ |
| 181 | } |
| 182 | |
| 183 | /* |
| 184 | * Extract the startoff field from an in memory bmap extent record. |
| 185 | */ |
| 186 | xfs_fileoff_t |
| 187 | xfs_bmbt_get_startoff( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 188 | xfs_bmbt_rec_host_t *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | { |
| 190 | return ((xfs_fileoff_t)r->l0 & |
| 191 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
| 192 | } |
| 193 | |
| 194 | xfs_exntst_t |
| 195 | xfs_bmbt_get_state( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 196 | xfs_bmbt_rec_host_t *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | { |
| 198 | int ext_flag; |
| 199 | |
| 200 | ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN)); |
| 201 | return xfs_extent_state(xfs_bmbt_get_blockcount(r), |
| 202 | ext_flag); |
| 203 | } |
| 204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | /* Endian flipping versions of the bmbt extraction functions */ |
| 206 | void |
| 207 | xfs_bmbt_disk_get_all( |
| 208 | xfs_bmbt_rec_t *r, |
| 209 | xfs_bmbt_irec_t *s) |
| 210 | { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 211 | __xfs_bmbt_get_all(be64_to_cpu(r->l0), be64_to_cpu(r->l1), s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | } |
| 213 | |
| 214 | /* |
| 215 | * Extract the blockcount field from an on disk bmap extent record. |
| 216 | */ |
| 217 | xfs_filblks_t |
| 218 | xfs_bmbt_disk_get_blockcount( |
| 219 | xfs_bmbt_rec_t *r) |
| 220 | { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 221 | return (xfs_filblks_t)(be64_to_cpu(r->l1) & XFS_MASK64LO(21)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | * Extract the startoff field from a disk format bmap extent record. |
| 226 | */ |
| 227 | xfs_fileoff_t |
| 228 | xfs_bmbt_disk_get_startoff( |
| 229 | xfs_bmbt_rec_t *r) |
| 230 | { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 231 | return ((xfs_fileoff_t)be64_to_cpu(r->l0) & |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
| 233 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | /* |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 237 | * Set all the fields in a bmap extent record from the arguments. |
| 238 | */ |
| 239 | void |
| 240 | xfs_bmbt_set_allf( |
| 241 | xfs_bmbt_rec_host_t *r, |
| 242 | xfs_fileoff_t startoff, |
| 243 | xfs_fsblock_t startblock, |
| 244 | xfs_filblks_t blockcount, |
| 245 | xfs_exntst_t state) |
| 246 | { |
| 247 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
| 248 | |
| 249 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); |
| 250 | ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0); |
| 251 | ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); |
| 252 | |
| 253 | #if XFS_BIG_BLKNOS |
| 254 | ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
| 255 | |
| 256 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 257 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
| 258 | ((xfs_bmbt_rec_base_t)startblock >> 43); |
| 259 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 260 | ((xfs_bmbt_rec_base_t)blockcount & |
| 261 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 262 | #else /* !XFS_BIG_BLKNOS */ |
Michal Piotrowski | ddc6d3b | 2007-08-23 16:20:10 +1000 | [diff] [blame] | 263 | if (ISNULLSTARTBLOCK(startblock)) { |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 264 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 265 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
| 266 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
| 267 | r->l1 = XFS_MASK64HI(11) | |
| 268 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 269 | ((xfs_bmbt_rec_base_t)blockcount & |
| 270 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 271 | } else { |
| 272 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 273 | ((xfs_bmbt_rec_base_t)startoff << 9); |
| 274 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 275 | ((xfs_bmbt_rec_base_t)blockcount & |
| 276 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 277 | } |
| 278 | #endif /* XFS_BIG_BLKNOS */ |
| 279 | } |
| 280 | |
| 281 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | * Set all the fields in a bmap extent record from the uncompressed form. |
| 283 | */ |
| 284 | void |
| 285 | xfs_bmbt_set_all( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 286 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | xfs_bmbt_irec_t *s) |
| 288 | { |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 289 | xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock, |
| 290 | s->br_blockcount, s->br_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | } |
| 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | /* |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 295 | * Set all the fields in a disk format bmap extent record from the arguments. |
| 296 | */ |
| 297 | void |
| 298 | xfs_bmbt_disk_set_allf( |
| 299 | xfs_bmbt_rec_t *r, |
| 300 | xfs_fileoff_t startoff, |
| 301 | xfs_fsblock_t startblock, |
| 302 | xfs_filblks_t blockcount, |
| 303 | xfs_exntst_t state) |
| 304 | { |
| 305 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
| 306 | |
| 307 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); |
| 308 | ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0); |
| 309 | ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); |
| 310 | |
| 311 | #if XFS_BIG_BLKNOS |
| 312 | ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
| 313 | |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 314 | r->l0 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 315 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 316 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
| 317 | ((xfs_bmbt_rec_base_t)startblock >> 43)); |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 318 | r->l1 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 319 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 320 | ((xfs_bmbt_rec_base_t)blockcount & |
| 321 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); |
| 322 | #else /* !XFS_BIG_BLKNOS */ |
Michal Piotrowski | ddc6d3b | 2007-08-23 16:20:10 +1000 | [diff] [blame] | 323 | if (ISNULLSTARTBLOCK(startblock)) { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 324 | r->l0 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 325 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 326 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
| 327 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(9)); |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 328 | r->l1 = cpu_to_be64(XFS_MASK64HI(11) | |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 329 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 330 | ((xfs_bmbt_rec_base_t)blockcount & |
| 331 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); |
| 332 | } else { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 333 | r->l0 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 334 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 335 | ((xfs_bmbt_rec_base_t)startoff << 9)); |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 336 | r->l1 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 337 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 338 | ((xfs_bmbt_rec_base_t)blockcount & |
| 339 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); |
| 340 | } |
| 341 | #endif /* XFS_BIG_BLKNOS */ |
| 342 | } |
| 343 | |
| 344 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | * Set all the fields in a bmap extent record from the uncompressed form. |
| 346 | */ |
| 347 | void |
| 348 | xfs_bmbt_disk_set_all( |
| 349 | xfs_bmbt_rec_t *r, |
| 350 | xfs_bmbt_irec_t *s) |
| 351 | { |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 352 | xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock, |
| 353 | s->br_blockcount, s->br_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | |
| 356 | /* |
| 357 | * Set the blockcount field in a bmap extent record. |
| 358 | */ |
| 359 | void |
| 360 | xfs_bmbt_set_blockcount( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 361 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | xfs_filblks_t v) |
| 363 | { |
| 364 | ASSERT((v & XFS_MASK64HI(43)) == 0); |
| 365 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) | |
| 366 | (xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21)); |
| 367 | } |
| 368 | |
| 369 | /* |
| 370 | * Set the startblock field in a bmap extent record. |
| 371 | */ |
| 372 | void |
| 373 | xfs_bmbt_set_startblock( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 374 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | xfs_fsblock_t v) |
| 376 | { |
| 377 | #if XFS_BIG_BLKNOS |
| 378 | ASSERT((v & XFS_MASK64HI(12)) == 0); |
| 379 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) | |
| 380 | (xfs_bmbt_rec_base_t)(v >> 43); |
| 381 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) | |
| 382 | (xfs_bmbt_rec_base_t)(v << 21); |
| 383 | #else /* !XFS_BIG_BLKNOS */ |
| 384 | if (ISNULLSTARTBLOCK(v)) { |
| 385 | r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
| 386 | r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) | |
| 387 | ((xfs_bmbt_rec_base_t)v << 21) | |
| 388 | (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 389 | } else { |
| 390 | r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
| 391 | r->l1 = ((xfs_bmbt_rec_base_t)v << 21) | |
| 392 | (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 393 | } |
| 394 | #endif /* XFS_BIG_BLKNOS */ |
| 395 | } |
| 396 | |
| 397 | /* |
| 398 | * Set the startoff field in a bmap extent record. |
| 399 | */ |
| 400 | void |
| 401 | xfs_bmbt_set_startoff( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 402 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | xfs_fileoff_t v) |
| 404 | { |
| 405 | ASSERT((v & XFS_MASK64HI(9)) == 0); |
| 406 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) | |
| 407 | ((xfs_bmbt_rec_base_t)v << 9) | |
| 408 | (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9)); |
| 409 | } |
| 410 | |
| 411 | /* |
| 412 | * Set the extent state field in a bmap extent record. |
| 413 | */ |
| 414 | void |
| 415 | xfs_bmbt_set_state( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 416 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | xfs_exntst_t v) |
| 418 | { |
| 419 | ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN); |
| 420 | if (v == XFS_EXT_NORM) |
| 421 | r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN); |
| 422 | else |
| 423 | r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN); |
| 424 | } |
| 425 | |
| 426 | /* |
| 427 | * Convert in-memory form of btree root to on-disk form. |
| 428 | */ |
| 429 | void |
| 430 | xfs_bmbt_to_bmdr( |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 431 | struct xfs_mount *mp, |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 432 | struct xfs_btree_block *rblock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | int rblocklen, |
| 434 | xfs_bmdr_block_t *dblock, |
| 435 | int dblocklen) |
| 436 | { |
| 437 | int dmxr; |
| 438 | xfs_bmbt_key_t *fkp; |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 439 | __be64 *fpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | xfs_bmbt_key_t *tkp; |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 441 | __be64 *tpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 443 | ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC); |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 444 | ASSERT(be64_to_cpu(rblock->bb_u.l.bb_leftsib) == NULLDFSBNO); |
| 445 | ASSERT(be64_to_cpu(rblock->bb_u.l.bb_rightsib) == NULLDFSBNO); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 446 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); |
| 447 | dblock->bb_level = rblock->bb_level; |
| 448 | dblock->bb_numrecs = rblock->bb_numrecs; |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 449 | dmxr = xfs_bmdr_maxrecs(mp, dblocklen, 0); |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 450 | fkp = XFS_BMBT_KEY_ADDR(mp, rblock, 1); |
| 451 | tkp = XFS_BMDR_KEY_ADDR(dblock, 1); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 452 | fpp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, rblocklen); |
Christoph Hellwig | 136341b | 2008-10-30 17:11:40 +1100 | [diff] [blame] | 453 | tpp = XFS_BMDR_PTR_ADDR(dblock, 1, dmxr); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 454 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 456 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | /* |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 460 | * Check extent records, which have just been read, for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | * any bit in the extent flag field. ASSERT on debug |
| 462 | * kernels, as this condition should not occur. |
| 463 | * Return an error condition (1) if any flags found, |
| 464 | * otherwise return 0. |
| 465 | */ |
| 466 | |
| 467 | int |
| 468 | xfs_check_nostate_extents( |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 469 | xfs_ifork_t *ifp, |
| 470 | xfs_extnum_t idx, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | xfs_extnum_t num) |
| 472 | { |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 473 | for (; num > 0; num--, idx++) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 474 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | if ((ep->l0 >> |
| 476 | (64 - BMBT_EXNTFLAG_BITLEN)) != 0) { |
| 477 | ASSERT(0); |
| 478 | return 1; |
| 479 | } |
| 480 | } |
| 481 | return 0; |
| 482 | } |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 483 | |
| 484 | |
| 485 | STATIC struct xfs_btree_cur * |
| 486 | xfs_bmbt_dup_cursor( |
| 487 | struct xfs_btree_cur *cur) |
| 488 | { |
| 489 | struct xfs_btree_cur *new; |
| 490 | |
| 491 | new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp, |
| 492 | cur->bc_private.b.ip, cur->bc_private.b.whichfork); |
| 493 | |
| 494 | /* |
| 495 | * Copy the firstblock, flist, and flags values, |
| 496 | * since init cursor doesn't get them. |
| 497 | */ |
| 498 | new->bc_private.b.firstblock = cur->bc_private.b.firstblock; |
| 499 | new->bc_private.b.flist = cur->bc_private.b.flist; |
| 500 | new->bc_private.b.flags = cur->bc_private.b.flags; |
| 501 | |
| 502 | return new; |
| 503 | } |
| 504 | |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 505 | STATIC void |
| 506 | xfs_bmbt_update_cursor( |
| 507 | struct xfs_btree_cur *src, |
| 508 | struct xfs_btree_cur *dst) |
| 509 | { |
| 510 | ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || |
| 511 | (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); |
| 512 | ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist); |
| 513 | |
| 514 | dst->bc_private.b.allocated += src->bc_private.b.allocated; |
| 515 | dst->bc_private.b.firstblock = src->bc_private.b.firstblock; |
| 516 | |
| 517 | src->bc_private.b.allocated = 0; |
| 518 | } |
| 519 | |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 520 | STATIC int |
Christoph Hellwig | f5eb8e7 | 2008-10-30 16:57:03 +1100 | [diff] [blame] | 521 | xfs_bmbt_alloc_block( |
| 522 | struct xfs_btree_cur *cur, |
| 523 | union xfs_btree_ptr *start, |
| 524 | union xfs_btree_ptr *new, |
| 525 | int length, |
| 526 | int *stat) |
| 527 | { |
| 528 | xfs_alloc_arg_t args; /* block allocation args */ |
| 529 | int error; /* error return value */ |
| 530 | |
| 531 | memset(&args, 0, sizeof(args)); |
| 532 | args.tp = cur->bc_tp; |
| 533 | args.mp = cur->bc_mp; |
| 534 | args.fsbno = cur->bc_private.b.firstblock; |
| 535 | args.firstblock = args.fsbno; |
| 536 | |
| 537 | if (args.fsbno == NULLFSBLOCK) { |
| 538 | args.fsbno = be64_to_cpu(start->l); |
| 539 | args.type = XFS_ALLOCTYPE_START_BNO; |
| 540 | /* |
| 541 | * Make sure there is sufficient room left in the AG to |
| 542 | * complete a full tree split for an extent insert. If |
| 543 | * we are converting the middle part of an extent then |
| 544 | * we may need space for two tree splits. |
| 545 | * |
| 546 | * We are relying on the caller to make the correct block |
| 547 | * reservation for this operation to succeed. If the |
| 548 | * reservation amount is insufficient then we may fail a |
| 549 | * block allocation here and corrupt the filesystem. |
| 550 | */ |
| 551 | args.minleft = xfs_trans_get_block_res(args.tp); |
| 552 | } else if (cur->bc_private.b.flist->xbf_low) { |
| 553 | args.type = XFS_ALLOCTYPE_START_BNO; |
| 554 | } else { |
| 555 | args.type = XFS_ALLOCTYPE_NEAR_BNO; |
| 556 | } |
| 557 | |
| 558 | args.minlen = args.maxlen = args.prod = 1; |
| 559 | args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL; |
| 560 | if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) { |
| 561 | error = XFS_ERROR(ENOSPC); |
| 562 | goto error0; |
| 563 | } |
| 564 | error = xfs_alloc_vextent(&args); |
| 565 | if (error) |
| 566 | goto error0; |
| 567 | |
| 568 | if (args.fsbno == NULLFSBLOCK && args.minleft) { |
| 569 | /* |
| 570 | * Could not find an AG with enough free space to satisfy |
| 571 | * a full btree split. Try again without minleft and if |
| 572 | * successful activate the lowspace algorithm. |
| 573 | */ |
| 574 | args.fsbno = 0; |
| 575 | args.type = XFS_ALLOCTYPE_FIRST_AG; |
| 576 | args.minleft = 0; |
| 577 | error = xfs_alloc_vextent(&args); |
| 578 | if (error) |
| 579 | goto error0; |
| 580 | cur->bc_private.b.flist->xbf_low = 1; |
| 581 | } |
| 582 | if (args.fsbno == NULLFSBLOCK) { |
| 583 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); |
| 584 | *stat = 0; |
| 585 | return 0; |
| 586 | } |
| 587 | ASSERT(args.len == 1); |
| 588 | cur->bc_private.b.firstblock = args.fsbno; |
| 589 | cur->bc_private.b.allocated++; |
| 590 | cur->bc_private.b.ip->i_d.di_nblocks++; |
| 591 | xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE); |
| 592 | XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip, |
| 593 | XFS_TRANS_DQ_BCOUNT, 1L); |
| 594 | |
| 595 | new->l = cpu_to_be64(args.fsbno); |
| 596 | |
| 597 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); |
| 598 | *stat = 1; |
| 599 | return 0; |
| 600 | |
| 601 | error0: |
| 602 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); |
| 603 | return error; |
| 604 | } |
| 605 | |
| 606 | STATIC int |
Christoph Hellwig | d4b3a4b | 2008-10-30 16:57:51 +1100 | [diff] [blame] | 607 | xfs_bmbt_free_block( |
| 608 | struct xfs_btree_cur *cur, |
| 609 | struct xfs_buf *bp) |
| 610 | { |
| 611 | struct xfs_mount *mp = cur->bc_mp; |
| 612 | struct xfs_inode *ip = cur->bc_private.b.ip; |
| 613 | struct xfs_trans *tp = cur->bc_tp; |
| 614 | xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); |
| 615 | |
| 616 | xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp); |
| 617 | ip->i_d.di_nblocks--; |
| 618 | |
| 619 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 620 | XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); |
| 621 | xfs_trans_binval(tp, bp); |
| 622 | return 0; |
| 623 | } |
| 624 | |
| 625 | STATIC int |
Christoph Hellwig | 91cca5df | 2008-10-30 16:58:01 +1100 | [diff] [blame] | 626 | xfs_bmbt_get_minrecs( |
| 627 | struct xfs_btree_cur *cur, |
| 628 | int level) |
| 629 | { |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 630 | if (level == cur->bc_nlevels - 1) { |
| 631 | struct xfs_ifork *ifp; |
| 632 | |
| 633 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, |
| 634 | cur->bc_private.b.whichfork); |
| 635 | |
| 636 | return xfs_bmbt_maxrecs(cur->bc_mp, |
| 637 | ifp->if_broot_bytes, level == 0) / 2; |
| 638 | } |
| 639 | |
| 640 | return cur->bc_mp->m_bmap_dmnr[level != 0]; |
Christoph Hellwig | 91cca5df | 2008-10-30 16:58:01 +1100 | [diff] [blame] | 641 | } |
| 642 | |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 643 | int |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 644 | xfs_bmbt_get_maxrecs( |
| 645 | struct xfs_btree_cur *cur, |
| 646 | int level) |
| 647 | { |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 648 | if (level == cur->bc_nlevels - 1) { |
| 649 | struct xfs_ifork *ifp; |
| 650 | |
| 651 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, |
| 652 | cur->bc_private.b.whichfork); |
| 653 | |
| 654 | return xfs_bmbt_maxrecs(cur->bc_mp, |
| 655 | ifp->if_broot_bytes, level == 0); |
| 656 | } |
| 657 | |
| 658 | return cur->bc_mp->m_bmap_dmxr[level != 0]; |
| 659 | |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 660 | } |
| 661 | |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 662 | /* |
| 663 | * Get the maximum records we could store in the on-disk format. |
| 664 | * |
| 665 | * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but |
| 666 | * for the root node this checks the available space in the dinode fork |
| 667 | * so that we can resize the in-memory buffer to match it. After a |
| 668 | * resize to the maximum size this function returns the same value |
| 669 | * as xfs_bmbt_get_maxrecs for the root node, too. |
| 670 | */ |
| 671 | STATIC int |
| 672 | xfs_bmbt_get_dmaxrecs( |
| 673 | struct xfs_btree_cur *cur, |
| 674 | int level) |
| 675 | { |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 676 | if (level != cur->bc_nlevels - 1) |
| 677 | return cur->bc_mp->m_bmap_dmxr[level != 0]; |
| 678 | return xfs_bmdr_maxrecs(cur->bc_mp, cur->bc_private.b.forksize, |
| 679 | level == 0); |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 680 | } |
| 681 | |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 682 | STATIC void |
| 683 | xfs_bmbt_init_key_from_rec( |
| 684 | union xfs_btree_key *key, |
| 685 | union xfs_btree_rec *rec) |
| 686 | { |
| 687 | key->bmbt.br_startoff = |
| 688 | cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); |
| 689 | } |
| 690 | |
| 691 | STATIC void |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 692 | xfs_bmbt_init_rec_from_key( |
| 693 | union xfs_btree_key *key, |
| 694 | union xfs_btree_rec *rec) |
| 695 | { |
| 696 | ASSERT(key->bmbt.br_startoff != 0); |
| 697 | |
| 698 | xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff), |
| 699 | 0, 0, XFS_EXT_NORM); |
| 700 | } |
| 701 | |
| 702 | STATIC void |
| 703 | xfs_bmbt_init_rec_from_cur( |
| 704 | struct xfs_btree_cur *cur, |
| 705 | union xfs_btree_rec *rec) |
| 706 | { |
| 707 | xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b); |
| 708 | } |
| 709 | |
| 710 | STATIC void |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 711 | xfs_bmbt_init_ptr_from_cur( |
| 712 | struct xfs_btree_cur *cur, |
| 713 | union xfs_btree_ptr *ptr) |
| 714 | { |
| 715 | ptr->l = 0; |
| 716 | } |
| 717 | |
| 718 | STATIC __int64_t |
| 719 | xfs_bmbt_key_diff( |
| 720 | struct xfs_btree_cur *cur, |
| 721 | union xfs_btree_key *key) |
| 722 | { |
| 723 | return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) - |
| 724 | cur->bc_rec.b.br_startoff; |
| 725 | } |
| 726 | |
Christoph Hellwig | 4a26e66 | 2008-10-30 16:58:32 +1100 | [diff] [blame] | 727 | #ifdef DEBUG |
| 728 | STATIC int |
| 729 | xfs_bmbt_keys_inorder( |
| 730 | struct xfs_btree_cur *cur, |
| 731 | union xfs_btree_key *k1, |
| 732 | union xfs_btree_key *k2) |
| 733 | { |
| 734 | return be64_to_cpu(k1->bmbt.br_startoff) < |
| 735 | be64_to_cpu(k2->bmbt.br_startoff); |
| 736 | } |
| 737 | |
| 738 | STATIC int |
| 739 | xfs_bmbt_recs_inorder( |
| 740 | struct xfs_btree_cur *cur, |
| 741 | union xfs_btree_rec *r1, |
| 742 | union xfs_btree_rec *r2) |
| 743 | { |
| 744 | return xfs_bmbt_disk_get_startoff(&r1->bmbt) + |
| 745 | xfs_bmbt_disk_get_blockcount(&r1->bmbt) <= |
| 746 | xfs_bmbt_disk_get_startoff(&r2->bmbt); |
| 747 | } |
| 748 | #endif /* DEBUG */ |
| 749 | |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 750 | #ifdef XFS_BTREE_TRACE |
| 751 | ktrace_t *xfs_bmbt_trace_buf; |
| 752 | |
| 753 | STATIC void |
| 754 | xfs_bmbt_trace_enter( |
| 755 | struct xfs_btree_cur *cur, |
| 756 | const char *func, |
| 757 | char *s, |
| 758 | int type, |
| 759 | int line, |
| 760 | __psunsigned_t a0, |
| 761 | __psunsigned_t a1, |
| 762 | __psunsigned_t a2, |
| 763 | __psunsigned_t a3, |
| 764 | __psunsigned_t a4, |
| 765 | __psunsigned_t a5, |
| 766 | __psunsigned_t a6, |
| 767 | __psunsigned_t a7, |
| 768 | __psunsigned_t a8, |
| 769 | __psunsigned_t a9, |
| 770 | __psunsigned_t a10) |
| 771 | { |
| 772 | struct xfs_inode *ip = cur->bc_private.b.ip; |
| 773 | int whichfork = cur->bc_private.b.whichfork; |
| 774 | |
| 775 | ktrace_enter(xfs_bmbt_trace_buf, |
| 776 | (void *)((__psint_t)type | (whichfork << 8) | (line << 16)), |
| 777 | (void *)func, (void *)s, (void *)ip, (void *)cur, |
| 778 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, |
| 779 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, |
| 780 | (void *)a8, (void *)a9, (void *)a10); |
| 781 | ktrace_enter(ip->i_btrace, |
| 782 | (void *)((__psint_t)type | (whichfork << 8) | (line << 16)), |
| 783 | (void *)func, (void *)s, (void *)ip, (void *)cur, |
| 784 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, |
| 785 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, |
| 786 | (void *)a8, (void *)a9, (void *)a10); |
| 787 | } |
| 788 | |
| 789 | STATIC void |
| 790 | xfs_bmbt_trace_cursor( |
| 791 | struct xfs_btree_cur *cur, |
| 792 | __uint32_t *s0, |
| 793 | __uint64_t *l0, |
| 794 | __uint64_t *l1) |
| 795 | { |
| 796 | struct xfs_bmbt_rec_host r; |
| 797 | |
| 798 | xfs_bmbt_set_all(&r, &cur->bc_rec.b); |
| 799 | |
| 800 | *s0 = (cur->bc_nlevels << 24) | |
| 801 | (cur->bc_private.b.flags << 16) | |
| 802 | cur->bc_private.b.allocated; |
| 803 | *l0 = r.l0; |
| 804 | *l1 = r.l1; |
| 805 | } |
| 806 | |
| 807 | STATIC void |
| 808 | xfs_bmbt_trace_key( |
| 809 | struct xfs_btree_cur *cur, |
| 810 | union xfs_btree_key *key, |
| 811 | __uint64_t *l0, |
| 812 | __uint64_t *l1) |
| 813 | { |
| 814 | *l0 = be64_to_cpu(key->bmbt.br_startoff); |
| 815 | *l1 = 0; |
| 816 | } |
| 817 | |
| 818 | STATIC void |
| 819 | xfs_bmbt_trace_record( |
| 820 | struct xfs_btree_cur *cur, |
| 821 | union xfs_btree_rec *rec, |
| 822 | __uint64_t *l0, |
| 823 | __uint64_t *l1, |
| 824 | __uint64_t *l2) |
| 825 | { |
| 826 | struct xfs_bmbt_irec irec; |
| 827 | |
| 828 | xfs_bmbt_disk_get_all(&rec->bmbt, &irec); |
| 829 | *l0 = irec.br_startoff; |
| 830 | *l1 = irec.br_startblock; |
| 831 | *l2 = irec.br_blockcount; |
| 832 | } |
| 833 | #endif /* XFS_BTREE_TRACE */ |
| 834 | |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 835 | static const struct xfs_btree_ops xfs_bmbt_ops = { |
Christoph Hellwig | 65f1eae | 2008-10-30 16:55:34 +1100 | [diff] [blame] | 836 | .rec_len = sizeof(xfs_bmbt_rec_t), |
| 837 | .key_len = sizeof(xfs_bmbt_key_t), |
| 838 | |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 839 | .dup_cursor = xfs_bmbt_dup_cursor, |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 840 | .update_cursor = xfs_bmbt_update_cursor, |
Christoph Hellwig | f5eb8e7 | 2008-10-30 16:57:03 +1100 | [diff] [blame] | 841 | .alloc_block = xfs_bmbt_alloc_block, |
Christoph Hellwig | d4b3a4b | 2008-10-30 16:57:51 +1100 | [diff] [blame] | 842 | .free_block = xfs_bmbt_free_block, |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 843 | .get_maxrecs = xfs_bmbt_get_maxrecs, |
Christoph Hellwig | 91cca5df | 2008-10-30 16:58:01 +1100 | [diff] [blame] | 844 | .get_minrecs = xfs_bmbt_get_minrecs, |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 845 | .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 846 | .init_key_from_rec = xfs_bmbt_init_key_from_rec, |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 847 | .init_rec_from_key = xfs_bmbt_init_rec_from_key, |
| 848 | .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 849 | .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, |
| 850 | .key_diff = xfs_bmbt_key_diff, |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 851 | |
Christoph Hellwig | 4a26e66 | 2008-10-30 16:58:32 +1100 | [diff] [blame] | 852 | #ifdef DEBUG |
| 853 | .keys_inorder = xfs_bmbt_keys_inorder, |
| 854 | .recs_inorder = xfs_bmbt_recs_inorder, |
| 855 | #endif |
| 856 | |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 857 | #ifdef XFS_BTREE_TRACE |
| 858 | .trace_enter = xfs_bmbt_trace_enter, |
| 859 | .trace_cursor = xfs_bmbt_trace_cursor, |
| 860 | .trace_key = xfs_bmbt_trace_key, |
| 861 | .trace_record = xfs_bmbt_trace_record, |
| 862 | #endif |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 863 | }; |
| 864 | |
| 865 | /* |
| 866 | * Allocate a new bmap btree cursor. |
| 867 | */ |
| 868 | struct xfs_btree_cur * /* new bmap btree cursor */ |
| 869 | xfs_bmbt_init_cursor( |
| 870 | struct xfs_mount *mp, /* file system mount point */ |
| 871 | struct xfs_trans *tp, /* transaction pointer */ |
| 872 | struct xfs_inode *ip, /* inode owning the btree */ |
| 873 | int whichfork) /* data or attr fork */ |
| 874 | { |
| 875 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); |
| 876 | struct xfs_btree_cur *cur; |
| 877 | |
| 878 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); |
| 879 | |
| 880 | cur->bc_tp = tp; |
| 881 | cur->bc_mp = mp; |
| 882 | cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1; |
| 883 | cur->bc_btnum = XFS_BTNUM_BMAP; |
| 884 | cur->bc_blocklog = mp->m_sb.sb_blocklog; |
| 885 | |
| 886 | cur->bc_ops = &xfs_bmbt_ops; |
Christoph Hellwig | e99ab90 | 2008-10-30 16:54:33 +1100 | [diff] [blame] | 887 | cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE; |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 888 | |
| 889 | cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork); |
| 890 | cur->bc_private.b.ip = ip; |
| 891 | cur->bc_private.b.firstblock = NULLFSBLOCK; |
| 892 | cur->bc_private.b.flist = NULL; |
| 893 | cur->bc_private.b.allocated = 0; |
| 894 | cur->bc_private.b.flags = 0; |
| 895 | cur->bc_private.b.whichfork = whichfork; |
| 896 | |
| 897 | return cur; |
| 898 | } |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 899 | |
| 900 | /* |
| 901 | * Calculate number of records in a bmap btree block. |
| 902 | */ |
| 903 | int |
| 904 | xfs_bmbt_maxrecs( |
| 905 | struct xfs_mount *mp, |
| 906 | int blocklen, |
| 907 | int leaf) |
| 908 | { |
Christoph Hellwig | 7cc95a8 | 2008-10-30 17:14:34 +1100 | [diff] [blame] | 909 | blocklen -= XFS_BMBT_BLOCK_LEN(mp); |
Christoph Hellwig | 60197e8 | 2008-10-30 17:11:19 +1100 | [diff] [blame] | 910 | |
| 911 | if (leaf) |
| 912 | return blocklen / sizeof(xfs_bmbt_rec_t); |
| 913 | return blocklen / (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)); |
| 914 | } |
| 915 | |
| 916 | /* |
| 917 | * Calculate number of records in a bmap btree inode root. |
| 918 | */ |
| 919 | int |
| 920 | xfs_bmdr_maxrecs( |
| 921 | struct xfs_mount *mp, |
| 922 | int blocklen, |
| 923 | int leaf) |
| 924 | { |
| 925 | blocklen -= sizeof(xfs_bmdr_block_t); |
| 926 | |
| 927 | if (leaf) |
| 928 | return blocklen / sizeof(xfs_bmdr_rec_t); |
| 929 | return blocklen / (sizeof(xfs_bmdr_key_t) + sizeof(xfs_bmdr_ptr_t)); |
| 930 | } |