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) 2000-2001,2005 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" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 27 | #include "xfs_dir2.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include "xfs_btree.h" |
Christoph Hellwig | f5eb8e7 | 2008-10-30 16:57:03 +1100 | [diff] [blame] | 38 | #include "xfs_btree_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_ialloc.h" |
| 40 | #include "xfs_alloc.h" |
| 41 | #include "xfs_error.h" |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | /* |
| 45 | * Get the data from the pointed-to record. |
| 46 | */ |
| 47 | int /* error */ |
| 48 | xfs_inobt_get_rec( |
| 49 | xfs_btree_cur_t *cur, /* btree cursor */ |
| 50 | xfs_agino_t *ino, /* output: starting inode of chunk */ |
| 51 | __int32_t *fcnt, /* output: number of free inodes */ |
| 52 | xfs_inofree_t *free, /* output: free inode mask */ |
| 53 | int *stat) /* output: success/failure */ |
| 54 | { |
| 55 | xfs_inobt_block_t *block; /* btree block */ |
| 56 | xfs_buf_t *bp; /* buffer containing btree block */ |
| 57 | #ifdef DEBUG |
| 58 | int error; /* error return value */ |
| 59 | #endif |
| 60 | int ptr; /* record number */ |
| 61 | xfs_inobt_rec_t *rec; /* record data */ |
| 62 | |
| 63 | bp = cur->bc_bufs[0]; |
| 64 | ptr = cur->bc_ptrs[0]; |
| 65 | block = XFS_BUF_TO_INOBT_BLOCK(bp); |
| 66 | #ifdef DEBUG |
| 67 | if ((error = xfs_btree_check_sblock(cur, block, 0, bp))) |
| 68 | return error; |
| 69 | #endif |
| 70 | /* |
| 71 | * Off the right end or left end, return failure. |
| 72 | */ |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 73 | if (ptr > be16_to_cpu(block->bb_numrecs) || ptr <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | *stat = 0; |
| 75 | return 0; |
| 76 | } |
| 77 | /* |
| 78 | * Point to the record and extract its data. |
| 79 | */ |
| 80 | rec = XFS_INOBT_REC_ADDR(block, ptr, cur); |
Christoph Hellwig | 61a2584 | 2006-09-28 10:57:04 +1000 | [diff] [blame] | 81 | *ino = be32_to_cpu(rec->ir_startino); |
| 82 | *fcnt = be32_to_cpu(rec->ir_freecount); |
| 83 | *free = be64_to_cpu(rec->ir_free); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | *stat = 1; |
| 85 | return 0; |
| 86 | } |
| 87 | |
Christoph Hellwig | 91cca5d | 2008-10-30 16:58:01 +1100 | [diff] [blame^] | 88 | STATIC int |
| 89 | xfs_inobt_get_minrecs( |
| 90 | struct xfs_btree_cur *cur, |
| 91 | int level) |
| 92 | { |
| 93 | return cur->bc_mp->m_inobt_mnr[level != 0]; |
| 94 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 96 | STATIC struct xfs_btree_cur * |
| 97 | xfs_inobt_dup_cursor( |
| 98 | struct xfs_btree_cur *cur) |
| 99 | { |
| 100 | return xfs_inobt_init_cursor(cur->bc_mp, cur->bc_tp, |
| 101 | cur->bc_private.a.agbp, cur->bc_private.a.agno); |
| 102 | } |
| 103 | |
Christoph Hellwig | 344207c | 2008-10-30 16:57:16 +1100 | [diff] [blame] | 104 | STATIC void |
| 105 | xfs_inobt_set_root( |
| 106 | struct xfs_btree_cur *cur, |
| 107 | union xfs_btree_ptr *nptr, |
| 108 | int inc) /* level change */ |
| 109 | { |
| 110 | struct xfs_buf *agbp = cur->bc_private.a.agbp; |
| 111 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp); |
| 112 | |
| 113 | agi->agi_root = nptr->s; |
| 114 | be32_add_cpu(&agi->agi_level, inc); |
| 115 | xfs_ialloc_log_agi(cur->bc_tp, agbp, XFS_AGI_ROOT | XFS_AGI_LEVEL); |
| 116 | } |
| 117 | |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 118 | STATIC int |
Christoph Hellwig | f5eb8e7 | 2008-10-30 16:57:03 +1100 | [diff] [blame] | 119 | xfs_inobt_alloc_block( |
| 120 | struct xfs_btree_cur *cur, |
| 121 | union xfs_btree_ptr *start, |
| 122 | union xfs_btree_ptr *new, |
| 123 | int length, |
| 124 | int *stat) |
| 125 | { |
| 126 | xfs_alloc_arg_t args; /* block allocation args */ |
| 127 | int error; /* error return value */ |
| 128 | xfs_agblock_t sbno = be32_to_cpu(start->s); |
| 129 | |
| 130 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); |
| 131 | |
| 132 | memset(&args, 0, sizeof(args)); |
| 133 | args.tp = cur->bc_tp; |
| 134 | args.mp = cur->bc_mp; |
| 135 | args.fsbno = XFS_AGB_TO_FSB(args.mp, cur->bc_private.a.agno, sbno); |
| 136 | args.minlen = 1; |
| 137 | args.maxlen = 1; |
| 138 | args.prod = 1; |
| 139 | args.type = XFS_ALLOCTYPE_NEAR_BNO; |
| 140 | |
| 141 | error = xfs_alloc_vextent(&args); |
| 142 | if (error) { |
| 143 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); |
| 144 | return error; |
| 145 | } |
| 146 | if (args.fsbno == NULLFSBLOCK) { |
| 147 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); |
| 148 | *stat = 0; |
| 149 | return 0; |
| 150 | } |
| 151 | ASSERT(args.len == 1); |
| 152 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); |
| 153 | |
| 154 | new->s = cpu_to_be32(XFS_FSB_TO_AGBNO(args.mp, args.fsbno)); |
| 155 | *stat = 1; |
| 156 | return 0; |
| 157 | } |
| 158 | |
Christoph Hellwig | d4b3a4b | 2008-10-30 16:57:51 +1100 | [diff] [blame] | 159 | STATIC int |
| 160 | xfs_inobt_free_block( |
| 161 | struct xfs_btree_cur *cur, |
| 162 | struct xfs_buf *bp) |
| 163 | { |
| 164 | xfs_fsblock_t fsbno; |
| 165 | int error; |
| 166 | |
| 167 | fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, XFS_BUF_ADDR(bp)); |
| 168 | error = xfs_free_extent(cur->bc_tp, fsbno, 1); |
| 169 | if (error) |
| 170 | return error; |
| 171 | |
| 172 | xfs_trans_binval(cur->bc_tp, bp); |
| 173 | return error; |
| 174 | } |
Christoph Hellwig | f5eb8e7 | 2008-10-30 16:57:03 +1100 | [diff] [blame] | 175 | |
| 176 | STATIC int |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 177 | xfs_inobt_get_maxrecs( |
| 178 | struct xfs_btree_cur *cur, |
| 179 | int level) |
| 180 | { |
| 181 | return cur->bc_mp->m_inobt_mxr[level != 0]; |
| 182 | } |
| 183 | |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 184 | STATIC void |
| 185 | xfs_inobt_init_key_from_rec( |
| 186 | union xfs_btree_key *key, |
| 187 | union xfs_btree_rec *rec) |
| 188 | { |
| 189 | key->inobt.ir_startino = rec->inobt.ir_startino; |
| 190 | } |
| 191 | |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 192 | STATIC void |
| 193 | xfs_inobt_init_rec_from_key( |
| 194 | union xfs_btree_key *key, |
| 195 | union xfs_btree_rec *rec) |
| 196 | { |
| 197 | rec->inobt.ir_startino = key->inobt.ir_startino; |
| 198 | } |
| 199 | |
| 200 | STATIC void |
| 201 | xfs_inobt_init_rec_from_cur( |
| 202 | struct xfs_btree_cur *cur, |
| 203 | union xfs_btree_rec *rec) |
| 204 | { |
| 205 | rec->inobt.ir_startino = cpu_to_be32(cur->bc_rec.i.ir_startino); |
| 206 | rec->inobt.ir_freecount = cpu_to_be32(cur->bc_rec.i.ir_freecount); |
| 207 | rec->inobt.ir_free = cpu_to_be64(cur->bc_rec.i.ir_free); |
| 208 | } |
| 209 | |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 210 | /* |
| 211 | * intial value of ptr for lookup |
| 212 | */ |
| 213 | STATIC void |
| 214 | xfs_inobt_init_ptr_from_cur( |
| 215 | struct xfs_btree_cur *cur, |
| 216 | union xfs_btree_ptr *ptr) |
| 217 | { |
| 218 | struct xfs_agi *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp); |
| 219 | |
| 220 | ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno)); |
| 221 | |
| 222 | ptr->s = agi->agi_root; |
| 223 | } |
| 224 | |
| 225 | STATIC __int64_t |
| 226 | xfs_inobt_key_diff( |
| 227 | struct xfs_btree_cur *cur, |
| 228 | union xfs_btree_key *key) |
| 229 | { |
| 230 | return (__int64_t)be32_to_cpu(key->inobt.ir_startino) - |
| 231 | cur->bc_rec.i.ir_startino; |
| 232 | } |
| 233 | |
Christoph Hellwig | 91cca5d | 2008-10-30 16:58:01 +1100 | [diff] [blame^] | 234 | STATIC int |
| 235 | xfs_inobt_kill_root( |
| 236 | struct xfs_btree_cur *cur, |
| 237 | struct xfs_buf *bp, |
| 238 | int level, |
| 239 | union xfs_btree_ptr *newroot) |
| 240 | { |
| 241 | int error; |
| 242 | |
| 243 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ENTRY); |
| 244 | XFS_BTREE_STATS_INC(cur, killroot); |
| 245 | |
| 246 | /* |
| 247 | * Update the root pointer, decreasing the level by 1 and then |
| 248 | * free the old root. |
| 249 | */ |
| 250 | xfs_inobt_set_root(cur, newroot, -1); |
| 251 | error = xfs_inobt_free_block(cur, bp); |
| 252 | if (error) { |
| 253 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); |
| 254 | return error; |
| 255 | } |
| 256 | |
| 257 | XFS_BTREE_STATS_INC(cur, free); |
| 258 | |
| 259 | cur->bc_bufs[level] = NULL; |
| 260 | cur->bc_nlevels--; |
| 261 | |
| 262 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); |
| 263 | return 0; |
| 264 | } |
| 265 | |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 266 | #ifdef XFS_BTREE_TRACE |
| 267 | ktrace_t *xfs_inobt_trace_buf; |
| 268 | |
| 269 | STATIC void |
| 270 | xfs_inobt_trace_enter( |
| 271 | struct xfs_btree_cur *cur, |
| 272 | const char *func, |
| 273 | char *s, |
| 274 | int type, |
| 275 | int line, |
| 276 | __psunsigned_t a0, |
| 277 | __psunsigned_t a1, |
| 278 | __psunsigned_t a2, |
| 279 | __psunsigned_t a3, |
| 280 | __psunsigned_t a4, |
| 281 | __psunsigned_t a5, |
| 282 | __psunsigned_t a6, |
| 283 | __psunsigned_t a7, |
| 284 | __psunsigned_t a8, |
| 285 | __psunsigned_t a9, |
| 286 | __psunsigned_t a10) |
| 287 | { |
| 288 | ktrace_enter(xfs_inobt_trace_buf, (void *)(__psint_t)type, |
| 289 | (void *)func, (void *)s, NULL, (void *)cur, |
| 290 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, |
| 291 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, |
| 292 | (void *)a8, (void *)a9, (void *)a10); |
| 293 | } |
| 294 | |
| 295 | STATIC void |
| 296 | xfs_inobt_trace_cursor( |
| 297 | struct xfs_btree_cur *cur, |
| 298 | __uint32_t *s0, |
| 299 | __uint64_t *l0, |
| 300 | __uint64_t *l1) |
| 301 | { |
| 302 | *s0 = cur->bc_private.a.agno; |
| 303 | *l0 = cur->bc_rec.i.ir_startino; |
| 304 | *l1 = cur->bc_rec.i.ir_free; |
| 305 | } |
| 306 | |
| 307 | STATIC void |
| 308 | xfs_inobt_trace_key( |
| 309 | struct xfs_btree_cur *cur, |
| 310 | union xfs_btree_key *key, |
| 311 | __uint64_t *l0, |
| 312 | __uint64_t *l1) |
| 313 | { |
| 314 | *l0 = be32_to_cpu(key->inobt.ir_startino); |
| 315 | *l1 = 0; |
| 316 | } |
| 317 | |
| 318 | STATIC void |
| 319 | xfs_inobt_trace_record( |
| 320 | struct xfs_btree_cur *cur, |
| 321 | union xfs_btree_rec *rec, |
| 322 | __uint64_t *l0, |
| 323 | __uint64_t *l1, |
| 324 | __uint64_t *l2) |
| 325 | { |
| 326 | *l0 = be32_to_cpu(rec->inobt.ir_startino); |
| 327 | *l1 = be32_to_cpu(rec->inobt.ir_freecount); |
| 328 | *l2 = be64_to_cpu(rec->inobt.ir_free); |
| 329 | } |
| 330 | #endif /* XFS_BTREE_TRACE */ |
| 331 | |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 332 | static const struct xfs_btree_ops xfs_inobt_ops = { |
Christoph Hellwig | 65f1eae | 2008-10-30 16:55:34 +1100 | [diff] [blame] | 333 | .rec_len = sizeof(xfs_inobt_rec_t), |
| 334 | .key_len = sizeof(xfs_inobt_key_t), |
| 335 | |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 336 | .dup_cursor = xfs_inobt_dup_cursor, |
Christoph Hellwig | 344207c | 2008-10-30 16:57:16 +1100 | [diff] [blame] | 337 | .set_root = xfs_inobt_set_root, |
Christoph Hellwig | 91cca5d | 2008-10-30 16:58:01 +1100 | [diff] [blame^] | 338 | .kill_root = xfs_inobt_kill_root, |
Christoph Hellwig | f5eb8e7 | 2008-10-30 16:57:03 +1100 | [diff] [blame] | 339 | .alloc_block = xfs_inobt_alloc_block, |
Christoph Hellwig | d4b3a4b | 2008-10-30 16:57:51 +1100 | [diff] [blame] | 340 | .free_block = xfs_inobt_free_block, |
Christoph Hellwig | 91cca5d | 2008-10-30 16:58:01 +1100 | [diff] [blame^] | 341 | .get_minrecs = xfs_inobt_get_minrecs, |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 342 | .get_maxrecs = xfs_inobt_get_maxrecs, |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 343 | .init_key_from_rec = xfs_inobt_init_key_from_rec, |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 344 | .init_rec_from_key = xfs_inobt_init_rec_from_key, |
| 345 | .init_rec_from_cur = xfs_inobt_init_rec_from_cur, |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 346 | .init_ptr_from_cur = xfs_inobt_init_ptr_from_cur, |
| 347 | .key_diff = xfs_inobt_key_diff, |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 348 | |
| 349 | #ifdef XFS_BTREE_TRACE |
| 350 | .trace_enter = xfs_inobt_trace_enter, |
| 351 | .trace_cursor = xfs_inobt_trace_cursor, |
| 352 | .trace_key = xfs_inobt_trace_key, |
| 353 | .trace_record = xfs_inobt_trace_record, |
| 354 | #endif |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 355 | }; |
| 356 | |
| 357 | /* |
| 358 | * Allocate a new inode btree cursor. |
| 359 | */ |
| 360 | struct xfs_btree_cur * /* new inode btree cursor */ |
| 361 | xfs_inobt_init_cursor( |
| 362 | struct xfs_mount *mp, /* file system mount point */ |
| 363 | struct xfs_trans *tp, /* transaction pointer */ |
| 364 | struct xfs_buf *agbp, /* buffer for agi structure */ |
| 365 | xfs_agnumber_t agno) /* allocation group number */ |
| 366 | { |
| 367 | struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp); |
| 368 | struct xfs_btree_cur *cur; |
| 369 | |
| 370 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); |
| 371 | |
| 372 | cur->bc_tp = tp; |
| 373 | cur->bc_mp = mp; |
| 374 | cur->bc_nlevels = be32_to_cpu(agi->agi_level); |
| 375 | cur->bc_btnum = XFS_BTNUM_INO; |
| 376 | cur->bc_blocklog = mp->m_sb.sb_blocklog; |
| 377 | |
| 378 | cur->bc_ops = &xfs_inobt_ops; |
| 379 | |
| 380 | cur->bc_private.a.agbp = agbp; |
| 381 | cur->bc_private.a.agno = agno; |
| 382 | |
| 383 | return cur; |
| 384 | } |