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) 2000-2002,2005 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" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_dir2_sf.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 34 | #include "xfs_attr_sf.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_dinode.h" |
| 36 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 37 | #include "xfs_btree.h" |
| 38 | #include "xfs_ialloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include "xfs_rtalloc.h" |
| 41 | #include "xfs_error.h" |
| 42 | #include "xfs_bmap.h" |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | /* |
| 46 | * Allocation group level functions. |
| 47 | */ |
David Chinner | 75de2a9 | 2008-03-27 18:00:38 +1100 | [diff] [blame] | 48 | static inline int |
| 49 | xfs_ialloc_cluster_alignment( |
| 50 | xfs_alloc_arg_t *args) |
| 51 | { |
| 52 | if (xfs_sb_version_hasalign(&args->mp->m_sb) && |
| 53 | args->mp->m_sb.sb_inoalignmt >= |
| 54 | XFS_B_TO_FSBT(args->mp, XFS_INODE_CLUSTER_SIZE(args->mp))) |
| 55 | return args->mp->m_sb.sb_inoalignmt; |
| 56 | return 1; |
| 57 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | /* |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 60 | * Lookup the record equal to ino in the btree given by cur. |
| 61 | */ |
| 62 | STATIC int /* error */ |
| 63 | xfs_inobt_lookup_eq( |
| 64 | struct xfs_btree_cur *cur, /* btree cursor */ |
| 65 | xfs_agino_t ino, /* starting inode of chunk */ |
| 66 | __int32_t fcnt, /* free inode count */ |
| 67 | xfs_inofree_t free, /* free inode mask */ |
| 68 | int *stat) /* success/failure */ |
| 69 | { |
| 70 | cur->bc_rec.i.ir_startino = ino; |
| 71 | cur->bc_rec.i.ir_freecount = fcnt; |
| 72 | cur->bc_rec.i.ir_free = free; |
| 73 | return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); |
| 74 | } |
| 75 | |
| 76 | /* |
| 77 | * Lookup the first record greater than or equal to ino |
| 78 | * in the btree given by cur. |
| 79 | */ |
| 80 | int /* error */ |
| 81 | xfs_inobt_lookup_ge( |
| 82 | struct xfs_btree_cur *cur, /* btree cursor */ |
| 83 | xfs_agino_t ino, /* starting inode of chunk */ |
| 84 | __int32_t fcnt, /* free inode count */ |
| 85 | xfs_inofree_t free, /* free inode mask */ |
| 86 | int *stat) /* success/failure */ |
| 87 | { |
| 88 | cur->bc_rec.i.ir_startino = ino; |
| 89 | cur->bc_rec.i.ir_freecount = fcnt; |
| 90 | cur->bc_rec.i.ir_free = free; |
| 91 | return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); |
| 92 | } |
| 93 | |
| 94 | /* |
| 95 | * Lookup the first record less than or equal to ino |
| 96 | * in the btree given by cur. |
| 97 | */ |
| 98 | int /* error */ |
| 99 | xfs_inobt_lookup_le( |
| 100 | struct xfs_btree_cur *cur, /* btree cursor */ |
| 101 | xfs_agino_t ino, /* starting inode of chunk */ |
| 102 | __int32_t fcnt, /* free inode count */ |
| 103 | xfs_inofree_t free, /* free inode mask */ |
| 104 | int *stat) /* success/failure */ |
| 105 | { |
| 106 | cur->bc_rec.i.ir_startino = ino; |
| 107 | cur->bc_rec.i.ir_freecount = fcnt; |
| 108 | cur->bc_rec.i.ir_free = free; |
| 109 | return xfs_btree_lookup(cur, XFS_LOOKUP_LE, stat); |
| 110 | } |
| 111 | |
| 112 | /* |
Christoph Hellwig | 278d0ca | 2008-10-30 16:56:32 +1100 | [diff] [blame] | 113 | * Update the record referred to by cur to the value given |
| 114 | * by [ino, fcnt, free]. |
| 115 | * This either works (return 0) or gets an EFSCORRUPTED error. |
| 116 | */ |
| 117 | STATIC int /* error */ |
| 118 | xfs_inobt_update( |
| 119 | struct xfs_btree_cur *cur, /* btree cursor */ |
| 120 | xfs_agino_t ino, /* starting inode of chunk */ |
| 121 | __int32_t fcnt, /* free inode count */ |
| 122 | xfs_inofree_t free) /* free inode mask */ |
| 123 | { |
| 124 | union xfs_btree_rec rec; |
| 125 | |
| 126 | rec.inobt.ir_startino = cpu_to_be32(ino); |
| 127 | rec.inobt.ir_freecount = cpu_to_be32(fcnt); |
| 128 | rec.inobt.ir_free = cpu_to_be64(free); |
| 129 | return xfs_btree_update(cur, &rec); |
| 130 | } |
| 131 | |
| 132 | /* |
Christoph Hellwig | 8cc938f | 2008-10-30 16:58:11 +1100 | [diff] [blame] | 133 | * Get the data from the pointed-to record. |
| 134 | */ |
| 135 | int /* error */ |
| 136 | xfs_inobt_get_rec( |
| 137 | struct xfs_btree_cur *cur, /* btree cursor */ |
| 138 | xfs_agino_t *ino, /* output: starting inode of chunk */ |
| 139 | __int32_t *fcnt, /* output: number of free inodes */ |
| 140 | xfs_inofree_t *free, /* output: free inode mask */ |
| 141 | int *stat) /* output: success/failure */ |
| 142 | { |
| 143 | union xfs_btree_rec *rec; |
| 144 | int error; |
| 145 | |
| 146 | error = xfs_btree_get_rec(cur, &rec, stat); |
| 147 | if (!error && *stat == 1) { |
| 148 | *ino = be32_to_cpu(rec->inobt.ir_startino); |
| 149 | *fcnt = be32_to_cpu(rec->inobt.ir_freecount); |
| 150 | *free = be64_to_cpu(rec->inobt.ir_free); |
| 151 | } |
| 152 | return error; |
| 153 | } |
| 154 | |
| 155 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | * Allocate new inodes in the allocation group specified by agbp. |
| 157 | * Return 0 for success, else error code. |
| 158 | */ |
| 159 | STATIC int /* error code or 0 */ |
| 160 | xfs_ialloc_ag_alloc( |
| 161 | xfs_trans_t *tp, /* transaction pointer */ |
| 162 | xfs_buf_t *agbp, /* alloc group buffer */ |
| 163 | int *alloc) |
| 164 | { |
| 165 | xfs_agi_t *agi; /* allocation group header */ |
| 166 | xfs_alloc_arg_t args; /* allocation argument structure */ |
| 167 | int blks_per_cluster; /* fs blocks per inode cluster */ |
| 168 | xfs_btree_cur_t *cur; /* inode btree cursor */ |
| 169 | xfs_daddr_t d; /* disk addr of buffer */ |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 170 | xfs_agnumber_t agno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | int error; |
| 172 | xfs_buf_t *fbuf; /* new free inodes' buffer */ |
| 173 | xfs_dinode_t *free; /* new free inode structure */ |
| 174 | int i; /* inode counter */ |
| 175 | int j; /* block counter */ |
| 176 | int nbufs; /* num bufs of new inodes */ |
| 177 | xfs_agino_t newino; /* new first inode's number */ |
| 178 | xfs_agino_t newlen; /* new number of inodes */ |
| 179 | int ninodes; /* num inodes per buf */ |
| 180 | xfs_agino_t thisino; /* current inode number, for loop */ |
| 181 | int version; /* inode version number to use */ |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 182 | int isaligned = 0; /* inode allocation at stripe unit */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | /* boundary */ |
David Chinner | 359346a | 2008-04-29 12:53:32 +1000 | [diff] [blame] | 184 | unsigned int gen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
| 186 | args.tp = tp; |
| 187 | args.mp = tp->t_mountp; |
| 188 | |
| 189 | /* |
| 190 | * Locking will ensure that we don't have two callers in here |
| 191 | * at one time. |
| 192 | */ |
| 193 | newlen = XFS_IALLOC_INODES(args.mp); |
| 194 | if (args.mp->m_maxicount && |
| 195 | args.mp->m_sb.sb_icount + newlen > args.mp->m_maxicount) |
| 196 | return XFS_ERROR(ENOSPC); |
| 197 | args.minlen = args.maxlen = XFS_IALLOC_BLOCKS(args.mp); |
| 198 | /* |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 199 | * First try to allocate inodes contiguous with the last-allocated |
| 200 | * chunk of inodes. If the filesystem is striped, this will fill |
| 201 | * an entire stripe unit with inodes. |
| 202 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | agi = XFS_BUF_TO_AGI(agbp); |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 204 | newino = be32_to_cpu(agi->agi_newino); |
Nathan Scott | 019ff2d | 2006-04-11 15:45:05 +1000 | [diff] [blame] | 205 | args.agbno = XFS_AGINO_TO_AGBNO(args.mp, newino) + |
| 206 | XFS_IALLOC_BLOCKS(args.mp); |
| 207 | if (likely(newino != NULLAGINO && |
| 208 | (args.agbno < be32_to_cpu(agi->agi_length)))) { |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 209 | args.fsbno = XFS_AGB_TO_FSB(args.mp, |
| 210 | be32_to_cpu(agi->agi_seqno), args.agbno); |
| 211 | args.type = XFS_ALLOCTYPE_THIS_BNO; |
| 212 | args.mod = args.total = args.wasdel = args.isfl = |
| 213 | args.userdata = args.minalignslop = 0; |
| 214 | args.prod = 1; |
David Chinner | 75de2a9 | 2008-03-27 18:00:38 +1100 | [diff] [blame] | 215 | |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 216 | /* |
David Chinner | 75de2a9 | 2008-03-27 18:00:38 +1100 | [diff] [blame] | 217 | * We need to take into account alignment here to ensure that |
| 218 | * we don't modify the free list if we fail to have an exact |
| 219 | * block. If we don't have an exact match, and every oher |
| 220 | * attempt allocation attempt fails, we'll end up cancelling |
| 221 | * a dirty transaction and shutting down. |
| 222 | * |
| 223 | * For an exact allocation, alignment must be 1, |
| 224 | * however we need to take cluster alignment into account when |
| 225 | * fixing up the freelist. Use the minalignslop field to |
| 226 | * indicate that extra blocks might be required for alignment, |
| 227 | * but not to use them in the actual exact allocation. |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 228 | */ |
David Chinner | 75de2a9 | 2008-03-27 18:00:38 +1100 | [diff] [blame] | 229 | args.alignment = 1; |
| 230 | args.minalignslop = xfs_ialloc_cluster_alignment(&args) - 1; |
| 231 | |
| 232 | /* Allow space for the inode btree to split. */ |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 233 | args.minleft = XFS_IN_MAXLEVELS(args.mp) - 1; |
| 234 | if ((error = xfs_alloc_vextent(&args))) |
| 235 | return error; |
| 236 | } else |
| 237 | args.fsbno = NULLFSBLOCK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 239 | if (unlikely(args.fsbno == NULLFSBLOCK)) { |
| 240 | /* |
| 241 | * Set the alignment for the allocation. |
| 242 | * If stripe alignment is turned on then align at stripe unit |
| 243 | * boundary. |
Nathan Scott | 019ff2d | 2006-04-11 15:45:05 +1000 | [diff] [blame] | 244 | * If the cluster size is smaller than a filesystem block |
| 245 | * then we're doing I/O for inodes in filesystem block size |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 246 | * pieces, so don't need alignment anyway. |
| 247 | */ |
| 248 | isaligned = 0; |
| 249 | if (args.mp->m_sinoalign) { |
| 250 | ASSERT(!(args.mp->m_flags & XFS_MOUNT_NOALIGN)); |
| 251 | args.alignment = args.mp->m_dalign; |
| 252 | isaligned = 1; |
David Chinner | 75de2a9 | 2008-03-27 18:00:38 +1100 | [diff] [blame] | 253 | } else |
| 254 | args.alignment = xfs_ialloc_cluster_alignment(&args); |
Glen Overby | 3ccb8b5 | 2006-03-29 09:52:28 +1000 | [diff] [blame] | 255 | /* |
| 256 | * Need to figure out where to allocate the inode blocks. |
| 257 | * Ideally they should be spaced out through the a.g. |
| 258 | * For now, just allocate blocks up front. |
| 259 | */ |
| 260 | args.agbno = be32_to_cpu(agi->agi_root); |
| 261 | args.fsbno = XFS_AGB_TO_FSB(args.mp, |
| 262 | be32_to_cpu(agi->agi_seqno), args.agbno); |
| 263 | /* |
| 264 | * Allocate a fixed-size extent of inodes. |
| 265 | */ |
| 266 | args.type = XFS_ALLOCTYPE_NEAR_BNO; |
| 267 | args.mod = args.total = args.wasdel = args.isfl = |
| 268 | args.userdata = args.minalignslop = 0; |
| 269 | args.prod = 1; |
| 270 | /* |
| 271 | * Allow space for the inode btree to split. |
| 272 | */ |
| 273 | args.minleft = XFS_IN_MAXLEVELS(args.mp) - 1; |
| 274 | if ((error = xfs_alloc_vextent(&args))) |
| 275 | return error; |
| 276 | } |
Nathan Scott | 019ff2d | 2006-04-11 15:45:05 +1000 | [diff] [blame] | 277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | /* |
| 279 | * If stripe alignment is turned on, then try again with cluster |
| 280 | * alignment. |
| 281 | */ |
| 282 | if (isaligned && args.fsbno == NULLFSBLOCK) { |
| 283 | args.type = XFS_ALLOCTYPE_NEAR_BNO; |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 284 | args.agbno = be32_to_cpu(agi->agi_root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | args.fsbno = XFS_AGB_TO_FSB(args.mp, |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 286 | be32_to_cpu(agi->agi_seqno), args.agbno); |
David Chinner | 75de2a9 | 2008-03-27 18:00:38 +1100 | [diff] [blame] | 287 | args.alignment = xfs_ialloc_cluster_alignment(&args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | if ((error = xfs_alloc_vextent(&args))) |
| 289 | return error; |
| 290 | } |
| 291 | |
| 292 | if (args.fsbno == NULLFSBLOCK) { |
| 293 | *alloc = 0; |
| 294 | return 0; |
| 295 | } |
| 296 | ASSERT(args.len == args.minlen); |
| 297 | /* |
| 298 | * Convert the results. |
| 299 | */ |
| 300 | newino = XFS_OFFBNO_TO_AGINO(args.mp, args.agbno, 0); |
| 301 | /* |
| 302 | * Loop over the new block(s), filling in the inodes. |
| 303 | * For small block sizes, manipulate the inodes in buffers |
| 304 | * which are multiples of the blocks size. |
| 305 | */ |
| 306 | if (args.mp->m_sb.sb_blocksize >= XFS_INODE_CLUSTER_SIZE(args.mp)) { |
| 307 | blks_per_cluster = 1; |
| 308 | nbufs = (int)args.len; |
| 309 | ninodes = args.mp->m_sb.sb_inopblock; |
| 310 | } else { |
| 311 | blks_per_cluster = XFS_INODE_CLUSTER_SIZE(args.mp) / |
| 312 | args.mp->m_sb.sb_blocksize; |
| 313 | nbufs = (int)args.len / blks_per_cluster; |
| 314 | ninodes = blks_per_cluster * args.mp->m_sb.sb_inopblock; |
| 315 | } |
| 316 | /* |
| 317 | * Figure out what version number to use in the inodes we create. |
| 318 | * If the superblock version has caught up to the one that supports |
| 319 | * the new inode format, then use the new inode version. Otherwise |
| 320 | * use the old version so that old kernels will continue to be |
| 321 | * able to use the file system. |
| 322 | */ |
Eric Sandeen | 6211870 | 2008-03-06 13:44:28 +1100 | [diff] [blame] | 323 | if (xfs_sb_version_hasnlink(&args.mp->m_sb)) |
Christoph Hellwig | 51ce16d | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 324 | version = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | else |
Christoph Hellwig | 51ce16d | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 326 | version = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
David Chinner | 359346a | 2008-04-29 12:53:32 +1000 | [diff] [blame] | 328 | /* |
| 329 | * Seed the new inode cluster with a random generation number. This |
| 330 | * prevents short-term reuse of generation numbers if a chunk is |
| 331 | * freed and then immediately reallocated. We use random numbers |
| 332 | * rather than a linear progression to prevent the next generation |
| 333 | * number from being easily guessable. |
| 334 | */ |
| 335 | gen = random32(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | for (j = 0; j < nbufs; j++) { |
| 337 | /* |
| 338 | * Get the block. |
| 339 | */ |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 340 | d = XFS_AGB_TO_DADDR(args.mp, be32_to_cpu(agi->agi_seqno), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | args.agbno + (j * blks_per_cluster)); |
| 342 | fbuf = xfs_trans_get_buf(tp, args.mp->m_ddev_targp, d, |
| 343 | args.mp->m_bsize * blks_per_cluster, |
| 344 | XFS_BUF_LOCK); |
| 345 | ASSERT(fbuf); |
| 346 | ASSERT(!XFS_BUF_GETERROR(fbuf)); |
Christoph Hellwig | d42f08f | 2008-11-28 14:23:38 +1100 | [diff] [blame] | 347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | /* |
Christoph Hellwig | d42f08f | 2008-11-28 14:23:38 +1100 | [diff] [blame] | 349 | * Initialize all inodes in this buffer and then log them. |
| 350 | * |
| 351 | * XXX: It would be much better if we had just one transaction to |
| 352 | * log a whole cluster of inodes instead of all the indivdual |
| 353 | * transactions causing a lot of log traffic. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | */ |
Nathan Scott | f30a121 | 2006-03-14 14:07:36 +1100 | [diff] [blame] | 355 | xfs_biozero(fbuf, 0, ninodes << args.mp->m_sb.sb_inodelog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | for (i = 0; i < ninodes; i++) { |
Christoph Hellwig | d42f08f | 2008-11-28 14:23:38 +1100 | [diff] [blame] | 357 | int ioffset = i << args.mp->m_sb.sb_inodelog; |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 358 | uint isize = sizeof(struct xfs_dinode); |
Christoph Hellwig | d42f08f | 2008-11-28 14:23:38 +1100 | [diff] [blame] | 359 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | free = XFS_MAKE_IPTR(args.mp, fbuf, i); |
Christoph Hellwig | 81591fe | 2008-11-28 14:23:39 +1100 | [diff] [blame] | 361 | free->di_magic = cpu_to_be16(XFS_DINODE_MAGIC); |
| 362 | free->di_version = version; |
| 363 | free->di_gen = cpu_to_be32(gen); |
Christoph Hellwig | 347d1c0 | 2007-08-28 13:57:51 +1000 | [diff] [blame] | 364 | free->di_next_unlinked = cpu_to_be32(NULLAGINO); |
Christoph Hellwig | d42f08f | 2008-11-28 14:23:38 +1100 | [diff] [blame] | 365 | xfs_trans_log_buf(tp, fbuf, ioffset, ioffset + isize - 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | } |
| 367 | xfs_trans_inode_alloc_buf(tp, fbuf); |
| 368 | } |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 369 | be32_add_cpu(&agi->agi_count, newlen); |
| 370 | be32_add_cpu(&agi->agi_freecount, newlen); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 371 | agno = be32_to_cpu(agi->agi_seqno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | down_read(&args.mp->m_peraglock); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 373 | args.mp->m_perag[agno].pagi_freecount += newlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | up_read(&args.mp->m_peraglock); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 375 | agi->agi_newino = cpu_to_be32(newino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | /* |
| 377 | * Insert records describing the new inode chunk into the btree. |
| 378 | */ |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 379 | cur = xfs_inobt_init_cursor(args.mp, tp, agbp, agno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | for (thisino = newino; |
| 381 | thisino < newino + newlen; |
| 382 | thisino += XFS_INODES_PER_CHUNK) { |
| 383 | if ((error = xfs_inobt_lookup_eq(cur, thisino, |
| 384 | XFS_INODES_PER_CHUNK, XFS_INOBT_ALL_FREE, &i))) { |
| 385 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); |
| 386 | return error; |
| 387 | } |
| 388 | ASSERT(i == 0); |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 389 | if ((error = xfs_btree_insert(cur, &i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); |
| 391 | return error; |
| 392 | } |
| 393 | ASSERT(i == 1); |
| 394 | } |
| 395 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); |
| 396 | /* |
| 397 | * Log allocation group header fields |
| 398 | */ |
| 399 | xfs_ialloc_log_agi(tp, agbp, |
| 400 | XFS_AGI_COUNT | XFS_AGI_FREECOUNT | XFS_AGI_NEWINO); |
| 401 | /* |
| 402 | * Modify/log superblock values for inode count and inode free count. |
| 403 | */ |
| 404 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_ICOUNT, (long)newlen); |
| 405 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, (long)newlen); |
| 406 | *alloc = 1; |
| 407 | return 0; |
| 408 | } |
| 409 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 410 | STATIC_INLINE xfs_agnumber_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | xfs_ialloc_next_ag( |
| 412 | xfs_mount_t *mp) |
| 413 | { |
| 414 | xfs_agnumber_t agno; |
| 415 | |
| 416 | spin_lock(&mp->m_agirotor_lock); |
| 417 | agno = mp->m_agirotor; |
| 418 | if (++mp->m_agirotor == mp->m_maxagi) |
| 419 | mp->m_agirotor = 0; |
| 420 | spin_unlock(&mp->m_agirotor_lock); |
| 421 | |
| 422 | return agno; |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * Select an allocation group to look for a free inode in, based on the parent |
| 427 | * inode and then mode. Return the allocation group buffer. |
| 428 | */ |
| 429 | STATIC xfs_buf_t * /* allocation group buffer */ |
| 430 | xfs_ialloc_ag_select( |
| 431 | xfs_trans_t *tp, /* transaction pointer */ |
| 432 | xfs_ino_t parent, /* parent directory inode number */ |
| 433 | mode_t mode, /* bits set to indicate file type */ |
| 434 | int okalloc) /* ok to allocate more space */ |
| 435 | { |
| 436 | xfs_buf_t *agbp; /* allocation group header buffer */ |
| 437 | xfs_agnumber_t agcount; /* number of ag's in the filesystem */ |
| 438 | xfs_agnumber_t agno; /* current ag number */ |
| 439 | int flags; /* alloc buffer locking flags */ |
| 440 | xfs_extlen_t ineed; /* blocks needed for inode allocation */ |
| 441 | xfs_extlen_t longest = 0; /* longest extent available */ |
| 442 | xfs_mount_t *mp; /* mount point structure */ |
| 443 | int needspace; /* file mode implies space allocated */ |
| 444 | xfs_perag_t *pag; /* per allocation group data */ |
| 445 | xfs_agnumber_t pagno; /* parent (starting) ag number */ |
| 446 | |
| 447 | /* |
| 448 | * Files of these types need at least one block if length > 0 |
| 449 | * (and they won't fit in the inode, but that's hard to figure out). |
| 450 | */ |
| 451 | needspace = S_ISDIR(mode) || S_ISREG(mode) || S_ISLNK(mode); |
| 452 | mp = tp->t_mountp; |
| 453 | agcount = mp->m_maxagi; |
| 454 | if (S_ISDIR(mode)) |
| 455 | pagno = xfs_ialloc_next_ag(mp); |
| 456 | else { |
| 457 | pagno = XFS_INO_TO_AGNO(mp, parent); |
| 458 | if (pagno >= agcount) |
| 459 | pagno = 0; |
| 460 | } |
| 461 | ASSERT(pagno < agcount); |
| 462 | /* |
| 463 | * Loop through allocation groups, looking for one with a little |
| 464 | * free space in it. Note we don't look for free inodes, exactly. |
| 465 | * Instead, we include whether there is a need to allocate inodes |
| 466 | * to mean that blocks must be allocated for them, |
| 467 | * if none are currently free. |
| 468 | */ |
| 469 | agno = pagno; |
| 470 | flags = XFS_ALLOC_FLAG_TRYLOCK; |
| 471 | down_read(&mp->m_peraglock); |
| 472 | for (;;) { |
| 473 | pag = &mp->m_perag[agno]; |
| 474 | if (!pag->pagi_init) { |
| 475 | if (xfs_ialloc_read_agi(mp, tp, agno, &agbp)) { |
| 476 | agbp = NULL; |
| 477 | goto nextag; |
| 478 | } |
| 479 | } else |
| 480 | agbp = NULL; |
| 481 | |
| 482 | if (!pag->pagi_inodeok) { |
| 483 | xfs_ialloc_next_ag(mp); |
| 484 | goto unlock_nextag; |
| 485 | } |
| 486 | |
| 487 | /* |
| 488 | * Is there enough free space for the file plus a block |
| 489 | * of inodes (if we need to allocate some)? |
| 490 | */ |
| 491 | ineed = pag->pagi_freecount ? 0 : XFS_IALLOC_BLOCKS(mp); |
| 492 | if (ineed && !pag->pagf_init) { |
| 493 | if (agbp == NULL && |
| 494 | xfs_ialloc_read_agi(mp, tp, agno, &agbp)) { |
| 495 | agbp = NULL; |
| 496 | goto nextag; |
| 497 | } |
| 498 | (void)xfs_alloc_pagf_init(mp, tp, agno, flags); |
| 499 | } |
| 500 | if (!ineed || pag->pagf_init) { |
| 501 | if (ineed && !(longest = pag->pagf_longest)) |
| 502 | longest = pag->pagf_flcount > 0; |
| 503 | if (!ineed || |
| 504 | (pag->pagf_freeblks >= needspace + ineed && |
| 505 | longest >= ineed && |
| 506 | okalloc)) { |
| 507 | if (agbp == NULL && |
| 508 | xfs_ialloc_read_agi(mp, tp, agno, &agbp)) { |
| 509 | agbp = NULL; |
| 510 | goto nextag; |
| 511 | } |
| 512 | up_read(&mp->m_peraglock); |
| 513 | return agbp; |
| 514 | } |
| 515 | } |
| 516 | unlock_nextag: |
| 517 | if (agbp) |
| 518 | xfs_trans_brelse(tp, agbp); |
| 519 | nextag: |
| 520 | /* |
| 521 | * No point in iterating over the rest, if we're shutting |
| 522 | * down. |
| 523 | */ |
| 524 | if (XFS_FORCED_SHUTDOWN(mp)) { |
| 525 | up_read(&mp->m_peraglock); |
Nathan Scott | 1121b21 | 2006-09-28 10:58:40 +1000 | [diff] [blame] | 526 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | } |
| 528 | agno++; |
| 529 | if (agno >= agcount) |
| 530 | agno = 0; |
| 531 | if (agno == pagno) { |
| 532 | if (flags == 0) { |
| 533 | up_read(&mp->m_peraglock); |
Nathan Scott | 1121b21 | 2006-09-28 10:58:40 +1000 | [diff] [blame] | 534 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | } |
| 536 | flags = 0; |
| 537 | } |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * Visible inode allocation functions. |
| 543 | */ |
| 544 | |
| 545 | /* |
| 546 | * Allocate an inode on disk. |
| 547 | * Mode is used to tell whether the new inode will need space, and whether |
| 548 | * it is a directory. |
| 549 | * |
| 550 | * The arguments IO_agbp and alloc_done are defined to work within |
| 551 | * the constraint of one allocation per transaction. |
| 552 | * xfs_dialloc() is designed to be called twice if it has to do an |
| 553 | * allocation to make more free inodes. On the first call, |
| 554 | * IO_agbp should be set to NULL. If an inode is available, |
| 555 | * i.e., xfs_dialloc() did not need to do an allocation, an inode |
| 556 | * number is returned. In this case, IO_agbp would be set to the |
| 557 | * current ag_buf and alloc_done set to false. |
| 558 | * If an allocation needed to be done, xfs_dialloc would return |
| 559 | * the current ag_buf in IO_agbp and set alloc_done to true. |
| 560 | * The caller should then commit the current transaction, allocate a new |
| 561 | * transaction, and call xfs_dialloc() again, passing in the previous |
| 562 | * value of IO_agbp. IO_agbp should be held across the transactions. |
| 563 | * Since the agbp is locked across the two calls, the second call is |
| 564 | * guaranteed to have a free inode available. |
| 565 | * |
| 566 | * Once we successfully pick an inode its number is returned and the |
| 567 | * on-disk data structures are updated. The inode itself is not read |
| 568 | * in, since doing so would break ordering constraints with xfs_reclaim. |
| 569 | */ |
| 570 | int |
| 571 | xfs_dialloc( |
| 572 | xfs_trans_t *tp, /* transaction pointer */ |
| 573 | xfs_ino_t parent, /* parent inode (directory) */ |
| 574 | mode_t mode, /* mode bits for new inode */ |
| 575 | int okalloc, /* ok to allocate more space */ |
| 576 | xfs_buf_t **IO_agbp, /* in/out ag header's buffer */ |
| 577 | boolean_t *alloc_done, /* true if we needed to replenish |
| 578 | inode freelist */ |
| 579 | xfs_ino_t *inop) /* inode number allocated */ |
| 580 | { |
| 581 | xfs_agnumber_t agcount; /* number of allocation groups */ |
| 582 | xfs_buf_t *agbp; /* allocation group header's buffer */ |
| 583 | xfs_agnumber_t agno; /* allocation group number */ |
| 584 | xfs_agi_t *agi; /* allocation group header structure */ |
| 585 | xfs_btree_cur_t *cur; /* inode allocation btree cursor */ |
| 586 | int error; /* error return value */ |
| 587 | int i; /* result code */ |
| 588 | int ialloced; /* inode allocation status */ |
| 589 | int noroom = 0; /* no space for inode blk allocation */ |
| 590 | xfs_ino_t ino; /* fs-relative inode to be returned */ |
| 591 | /* REFERENCED */ |
| 592 | int j; /* result code */ |
| 593 | xfs_mount_t *mp; /* file system mount structure */ |
| 594 | int offset; /* index of inode in chunk */ |
| 595 | xfs_agino_t pagino; /* parent's a.g. relative inode # */ |
| 596 | xfs_agnumber_t pagno; /* parent's allocation group number */ |
Christoph Hellwig | 61a2584 | 2006-09-28 10:57:04 +1000 | [diff] [blame] | 597 | xfs_inobt_rec_incore_t rec; /* inode allocation record */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | xfs_agnumber_t tagno; /* testing allocation group number */ |
| 599 | xfs_btree_cur_t *tcur; /* temp cursor */ |
Christoph Hellwig | 61a2584 | 2006-09-28 10:57:04 +1000 | [diff] [blame] | 600 | xfs_inobt_rec_incore_t trec; /* temp inode allocation record */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
| 602 | |
| 603 | if (*IO_agbp == NULL) { |
| 604 | /* |
| 605 | * We do not have an agbp, so select an initial allocation |
| 606 | * group for inode allocation. |
| 607 | */ |
| 608 | agbp = xfs_ialloc_ag_select(tp, parent, mode, okalloc); |
| 609 | /* |
| 610 | * Couldn't find an allocation group satisfying the |
| 611 | * criteria, give up. |
| 612 | */ |
| 613 | if (!agbp) { |
| 614 | *inop = NULLFSINO; |
| 615 | return 0; |
| 616 | } |
| 617 | agi = XFS_BUF_TO_AGI(agbp); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 618 | ASSERT(be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | } else { |
| 620 | /* |
| 621 | * Continue where we left off before. In this case, we |
| 622 | * know that the allocation group has free inodes. |
| 623 | */ |
| 624 | agbp = *IO_agbp; |
| 625 | agi = XFS_BUF_TO_AGI(agbp); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 626 | ASSERT(be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC); |
| 627 | ASSERT(be32_to_cpu(agi->agi_freecount) > 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | } |
| 629 | mp = tp->t_mountp; |
| 630 | agcount = mp->m_sb.sb_agcount; |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 631 | agno = be32_to_cpu(agi->agi_seqno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | tagno = agno; |
| 633 | pagno = XFS_INO_TO_AGNO(mp, parent); |
| 634 | pagino = XFS_INO_TO_AGINO(mp, parent); |
| 635 | |
| 636 | /* |
| 637 | * If we have already hit the ceiling of inode blocks then clear |
| 638 | * okalloc so we scan all available agi structures for a free |
| 639 | * inode. |
| 640 | */ |
| 641 | |
| 642 | if (mp->m_maxicount && |
| 643 | mp->m_sb.sb_icount + XFS_IALLOC_INODES(mp) > mp->m_maxicount) { |
| 644 | noroom = 1; |
| 645 | okalloc = 0; |
| 646 | } |
| 647 | |
| 648 | /* |
| 649 | * Loop until we find an allocation group that either has free inodes |
| 650 | * or in which we can allocate some inodes. Iterate through the |
| 651 | * allocation groups upward, wrapping at the end. |
| 652 | */ |
| 653 | *alloc_done = B_FALSE; |
| 654 | while (!agi->agi_freecount) { |
| 655 | /* |
| 656 | * Don't do anything if we're not supposed to allocate |
| 657 | * any blocks, just go on to the next ag. |
| 658 | */ |
| 659 | if (okalloc) { |
| 660 | /* |
| 661 | * Try to allocate some new inodes in the allocation |
| 662 | * group. |
| 663 | */ |
| 664 | if ((error = xfs_ialloc_ag_alloc(tp, agbp, &ialloced))) { |
| 665 | xfs_trans_brelse(tp, agbp); |
| 666 | if (error == ENOSPC) { |
| 667 | *inop = NULLFSINO; |
| 668 | return 0; |
| 669 | } else |
| 670 | return error; |
| 671 | } |
| 672 | if (ialloced) { |
| 673 | /* |
| 674 | * We successfully allocated some inodes, return |
| 675 | * the current context to the caller so that it |
| 676 | * can commit the current transaction and call |
| 677 | * us again where we left off. |
| 678 | */ |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 679 | ASSERT(be32_to_cpu(agi->agi_freecount) > 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | *alloc_done = B_TRUE; |
| 681 | *IO_agbp = agbp; |
| 682 | *inop = NULLFSINO; |
| 683 | return 0; |
| 684 | } |
| 685 | } |
| 686 | /* |
| 687 | * If it failed, give up on this ag. |
| 688 | */ |
| 689 | xfs_trans_brelse(tp, agbp); |
| 690 | /* |
| 691 | * Go on to the next ag: get its ag header. |
| 692 | */ |
| 693 | nextag: |
| 694 | if (++tagno == agcount) |
| 695 | tagno = 0; |
| 696 | if (tagno == agno) { |
| 697 | *inop = NULLFSINO; |
| 698 | return noroom ? ENOSPC : 0; |
| 699 | } |
| 700 | down_read(&mp->m_peraglock); |
| 701 | if (mp->m_perag[tagno].pagi_inodeok == 0) { |
| 702 | up_read(&mp->m_peraglock); |
| 703 | goto nextag; |
| 704 | } |
| 705 | error = xfs_ialloc_read_agi(mp, tp, tagno, &agbp); |
| 706 | up_read(&mp->m_peraglock); |
| 707 | if (error) |
| 708 | goto nextag; |
| 709 | agi = XFS_BUF_TO_AGI(agbp); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 710 | ASSERT(be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | } |
| 712 | /* |
| 713 | * Here with an allocation group that has a free inode. |
| 714 | * Reset agno since we may have chosen a new ag in the |
| 715 | * loop above. |
| 716 | */ |
| 717 | agno = tagno; |
| 718 | *IO_agbp = NULL; |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 719 | cur = xfs_inobt_init_cursor(mp, tp, agbp, be32_to_cpu(agi->agi_seqno)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | /* |
| 721 | * If pagino is 0 (this is the root inode allocation) use newino. |
| 722 | * This must work because we've just allocated some. |
| 723 | */ |
| 724 | if (!pagino) |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 725 | pagino = be32_to_cpu(agi->agi_newino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | #ifdef DEBUG |
| 727 | if (cur->bc_nlevels == 1) { |
| 728 | int freecount = 0; |
| 729 | |
| 730 | if ((error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i))) |
| 731 | goto error0; |
| 732 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 733 | do { |
| 734 | if ((error = xfs_inobt_get_rec(cur, &rec.ir_startino, |
| 735 | &rec.ir_freecount, &rec.ir_free, &i))) |
| 736 | goto error0; |
| 737 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 738 | freecount += rec.ir_freecount; |
Christoph Hellwig | 637aa50 | 2008-10-30 16:55:45 +1100 | [diff] [blame] | 739 | if ((error = xfs_btree_increment(cur, 0, &i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | goto error0; |
| 741 | } while (i == 1); |
| 742 | |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 743 | ASSERT(freecount == be32_to_cpu(agi->agi_freecount) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | XFS_FORCED_SHUTDOWN(mp)); |
| 745 | } |
| 746 | #endif |
| 747 | /* |
| 748 | * If in the same a.g. as the parent, try to get near the parent. |
| 749 | */ |
| 750 | if (pagno == agno) { |
| 751 | if ((error = xfs_inobt_lookup_le(cur, pagino, 0, 0, &i))) |
| 752 | goto error0; |
| 753 | if (i != 0 && |
| 754 | (error = xfs_inobt_get_rec(cur, &rec.ir_startino, |
| 755 | &rec.ir_freecount, &rec.ir_free, &j)) == 0 && |
| 756 | j == 1 && |
| 757 | rec.ir_freecount > 0) { |
| 758 | /* |
| 759 | * Found a free inode in the same chunk |
| 760 | * as parent, done. |
| 761 | */ |
| 762 | } |
| 763 | /* |
| 764 | * In the same a.g. as parent, but parent's chunk is full. |
| 765 | */ |
| 766 | else { |
| 767 | int doneleft; /* done, to the left */ |
| 768 | int doneright; /* done, to the right */ |
| 769 | |
| 770 | if (error) |
| 771 | goto error0; |
| 772 | ASSERT(i == 1); |
| 773 | ASSERT(j == 1); |
| 774 | /* |
| 775 | * Duplicate the cursor, search left & right |
| 776 | * simultaneously. |
| 777 | */ |
| 778 | if ((error = xfs_btree_dup_cursor(cur, &tcur))) |
| 779 | goto error0; |
| 780 | /* |
| 781 | * Search left with tcur, back up 1 record. |
| 782 | */ |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 783 | if ((error = xfs_btree_decrement(tcur, 0, &i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | goto error1; |
| 785 | doneleft = !i; |
| 786 | if (!doneleft) { |
| 787 | if ((error = xfs_inobt_get_rec(tcur, |
| 788 | &trec.ir_startino, |
| 789 | &trec.ir_freecount, |
| 790 | &trec.ir_free, &i))) |
| 791 | goto error1; |
| 792 | XFS_WANT_CORRUPTED_GOTO(i == 1, error1); |
| 793 | } |
| 794 | /* |
| 795 | * Search right with cur, go forward 1 record. |
| 796 | */ |
Christoph Hellwig | 637aa50 | 2008-10-30 16:55:45 +1100 | [diff] [blame] | 797 | if ((error = xfs_btree_increment(cur, 0, &i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | goto error1; |
| 799 | doneright = !i; |
| 800 | if (!doneright) { |
| 801 | if ((error = xfs_inobt_get_rec(cur, |
| 802 | &rec.ir_startino, |
| 803 | &rec.ir_freecount, |
| 804 | &rec.ir_free, &i))) |
| 805 | goto error1; |
| 806 | XFS_WANT_CORRUPTED_GOTO(i == 1, error1); |
| 807 | } |
| 808 | /* |
| 809 | * Loop until we find the closest inode chunk |
| 810 | * with a free one. |
| 811 | */ |
| 812 | while (!doneleft || !doneright) { |
| 813 | int useleft; /* using left inode |
| 814 | chunk this time */ |
| 815 | |
| 816 | /* |
| 817 | * Figure out which block is closer, |
| 818 | * if both are valid. |
| 819 | */ |
| 820 | if (!doneleft && !doneright) |
| 821 | useleft = |
| 822 | pagino - |
| 823 | (trec.ir_startino + |
| 824 | XFS_INODES_PER_CHUNK - 1) < |
| 825 | rec.ir_startino - pagino; |
| 826 | else |
| 827 | useleft = !doneleft; |
| 828 | /* |
| 829 | * If checking the left, does it have |
| 830 | * free inodes? |
| 831 | */ |
| 832 | if (useleft && trec.ir_freecount) { |
| 833 | /* |
| 834 | * Yes, set it up as the chunk to use. |
| 835 | */ |
| 836 | rec = trec; |
| 837 | xfs_btree_del_cursor(cur, |
| 838 | XFS_BTREE_NOERROR); |
| 839 | cur = tcur; |
| 840 | break; |
| 841 | } |
| 842 | /* |
| 843 | * If checking the right, does it have |
| 844 | * free inodes? |
| 845 | */ |
| 846 | if (!useleft && rec.ir_freecount) { |
| 847 | /* |
| 848 | * Yes, it's already set up. |
| 849 | */ |
| 850 | xfs_btree_del_cursor(tcur, |
| 851 | XFS_BTREE_NOERROR); |
| 852 | break; |
| 853 | } |
| 854 | /* |
| 855 | * If used the left, get another one |
| 856 | * further left. |
| 857 | */ |
| 858 | if (useleft) { |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 859 | if ((error = xfs_btree_decrement(tcur, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | &i))) |
| 861 | goto error1; |
| 862 | doneleft = !i; |
| 863 | if (!doneleft) { |
| 864 | if ((error = xfs_inobt_get_rec( |
| 865 | tcur, |
| 866 | &trec.ir_startino, |
| 867 | &trec.ir_freecount, |
| 868 | &trec.ir_free, &i))) |
| 869 | goto error1; |
| 870 | XFS_WANT_CORRUPTED_GOTO(i == 1, |
| 871 | error1); |
| 872 | } |
| 873 | } |
| 874 | /* |
| 875 | * If used the right, get another one |
| 876 | * further right. |
| 877 | */ |
| 878 | else { |
Christoph Hellwig | 637aa50 | 2008-10-30 16:55:45 +1100 | [diff] [blame] | 879 | if ((error = xfs_btree_increment(cur, 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | &i))) |
| 881 | goto error1; |
| 882 | doneright = !i; |
| 883 | if (!doneright) { |
| 884 | if ((error = xfs_inobt_get_rec( |
| 885 | cur, |
| 886 | &rec.ir_startino, |
| 887 | &rec.ir_freecount, |
| 888 | &rec.ir_free, &i))) |
| 889 | goto error1; |
| 890 | XFS_WANT_CORRUPTED_GOTO(i == 1, |
| 891 | error1); |
| 892 | } |
| 893 | } |
| 894 | } |
| 895 | ASSERT(!doneleft || !doneright); |
| 896 | } |
| 897 | } |
| 898 | /* |
| 899 | * In a different a.g. from the parent. |
| 900 | * See if the most recently allocated block has any free. |
| 901 | */ |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 902 | else if (be32_to_cpu(agi->agi_newino) != NULLAGINO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | if ((error = xfs_inobt_lookup_eq(cur, |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 904 | be32_to_cpu(agi->agi_newino), 0, 0, &i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | goto error0; |
| 906 | if (i == 1 && |
| 907 | (error = xfs_inobt_get_rec(cur, &rec.ir_startino, |
| 908 | &rec.ir_freecount, &rec.ir_free, &j)) == 0 && |
| 909 | j == 1 && |
| 910 | rec.ir_freecount > 0) { |
| 911 | /* |
| 912 | * The last chunk allocated in the group still has |
| 913 | * a free inode. |
| 914 | */ |
| 915 | } |
| 916 | /* |
| 917 | * None left in the last group, search the whole a.g. |
| 918 | */ |
| 919 | else { |
| 920 | if (error) |
| 921 | goto error0; |
| 922 | if ((error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i))) |
| 923 | goto error0; |
| 924 | ASSERT(i == 1); |
| 925 | for (;;) { |
| 926 | if ((error = xfs_inobt_get_rec(cur, |
| 927 | &rec.ir_startino, |
| 928 | &rec.ir_freecount, &rec.ir_free, |
| 929 | &i))) |
| 930 | goto error0; |
| 931 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 932 | if (rec.ir_freecount > 0) |
| 933 | break; |
Christoph Hellwig | 637aa50 | 2008-10-30 16:55:45 +1100 | [diff] [blame] | 934 | if ((error = xfs_btree_increment(cur, 0, &i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | goto error0; |
| 936 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 937 | } |
| 938 | } |
| 939 | } |
| 940 | offset = XFS_IALLOC_FIND_FREE(&rec.ir_free); |
| 941 | ASSERT(offset >= 0); |
| 942 | ASSERT(offset < XFS_INODES_PER_CHUNK); |
| 943 | ASSERT((XFS_AGINO_TO_OFFSET(mp, rec.ir_startino) % |
| 944 | XFS_INODES_PER_CHUNK) == 0); |
| 945 | ino = XFS_AGINO_TO_INO(mp, agno, rec.ir_startino + offset); |
| 946 | XFS_INOBT_CLR_FREE(&rec, offset); |
| 947 | rec.ir_freecount--; |
| 948 | if ((error = xfs_inobt_update(cur, rec.ir_startino, rec.ir_freecount, |
| 949 | rec.ir_free))) |
| 950 | goto error0; |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 951 | be32_add_cpu(&agi->agi_freecount, -1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | xfs_ialloc_log_agi(tp, agbp, XFS_AGI_FREECOUNT); |
| 953 | down_read(&mp->m_peraglock); |
| 954 | mp->m_perag[tagno].pagi_freecount--; |
| 955 | up_read(&mp->m_peraglock); |
| 956 | #ifdef DEBUG |
| 957 | if (cur->bc_nlevels == 1) { |
| 958 | int freecount = 0; |
| 959 | |
| 960 | if ((error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i))) |
| 961 | goto error0; |
| 962 | do { |
| 963 | if ((error = xfs_inobt_get_rec(cur, &rec.ir_startino, |
| 964 | &rec.ir_freecount, &rec.ir_free, &i))) |
| 965 | goto error0; |
| 966 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 967 | freecount += rec.ir_freecount; |
Christoph Hellwig | 637aa50 | 2008-10-30 16:55:45 +1100 | [diff] [blame] | 968 | if ((error = xfs_btree_increment(cur, 0, &i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | goto error0; |
| 970 | } while (i == 1); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 971 | ASSERT(freecount == be32_to_cpu(agi->agi_freecount) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | XFS_FORCED_SHUTDOWN(mp)); |
| 973 | } |
| 974 | #endif |
| 975 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); |
| 976 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, -1); |
| 977 | *inop = ino; |
| 978 | return 0; |
| 979 | error1: |
| 980 | xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR); |
| 981 | error0: |
| 982 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); |
| 983 | return error; |
| 984 | } |
| 985 | |
| 986 | /* |
| 987 | * Free disk inode. Carefully avoids touching the incore inode, all |
| 988 | * manipulations incore are the caller's responsibility. |
| 989 | * The on-disk inode is not changed by this operation, only the |
| 990 | * btree (free inode mask) is changed. |
| 991 | */ |
| 992 | int |
| 993 | xfs_difree( |
| 994 | xfs_trans_t *tp, /* transaction pointer */ |
| 995 | xfs_ino_t inode, /* inode to be freed */ |
| 996 | xfs_bmap_free_t *flist, /* extents to free */ |
| 997 | int *delete, /* set if inode cluster was deleted */ |
| 998 | xfs_ino_t *first_ino) /* first inode in deleted cluster */ |
| 999 | { |
| 1000 | /* REFERENCED */ |
| 1001 | xfs_agblock_t agbno; /* block number containing inode */ |
| 1002 | xfs_buf_t *agbp; /* buffer containing allocation group header */ |
| 1003 | xfs_agino_t agino; /* inode number relative to allocation group */ |
| 1004 | xfs_agnumber_t agno; /* allocation group number */ |
| 1005 | xfs_agi_t *agi; /* allocation group header */ |
| 1006 | xfs_btree_cur_t *cur; /* inode btree cursor */ |
| 1007 | int error; /* error return value */ |
| 1008 | int i; /* result code */ |
| 1009 | int ilen; /* inodes in an inode cluster */ |
| 1010 | xfs_mount_t *mp; /* mount structure for filesystem */ |
| 1011 | int off; /* offset of inode in inode chunk */ |
Christoph Hellwig | 61a2584 | 2006-09-28 10:57:04 +1000 | [diff] [blame] | 1012 | xfs_inobt_rec_incore_t rec; /* btree record */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | |
| 1014 | mp = tp->t_mountp; |
| 1015 | |
| 1016 | /* |
| 1017 | * Break up inode number into its components. |
| 1018 | */ |
| 1019 | agno = XFS_INO_TO_AGNO(mp, inode); |
| 1020 | if (agno >= mp->m_sb.sb_agcount) { |
| 1021 | cmn_err(CE_WARN, |
| 1022 | "xfs_difree: agno >= mp->m_sb.sb_agcount (%d >= %d) on %s. Returning EINVAL.", |
| 1023 | agno, mp->m_sb.sb_agcount, mp->m_fsname); |
| 1024 | ASSERT(0); |
| 1025 | return XFS_ERROR(EINVAL); |
| 1026 | } |
| 1027 | agino = XFS_INO_TO_AGINO(mp, inode); |
| 1028 | if (inode != XFS_AGINO_TO_INO(mp, agno, agino)) { |
| 1029 | cmn_err(CE_WARN, |
Christoph Hellwig | da1650a | 2005-11-02 10:21:35 +1100 | [diff] [blame] | 1030 | "xfs_difree: inode != XFS_AGINO_TO_INO() " |
| 1031 | "(%llu != %llu) on %s. Returning EINVAL.", |
| 1032 | (unsigned long long)inode, |
| 1033 | (unsigned long long)XFS_AGINO_TO_INO(mp, agno, agino), |
| 1034 | mp->m_fsname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | ASSERT(0); |
| 1036 | return XFS_ERROR(EINVAL); |
| 1037 | } |
| 1038 | agbno = XFS_AGINO_TO_AGBNO(mp, agino); |
| 1039 | if (agbno >= mp->m_sb.sb_agblocks) { |
| 1040 | cmn_err(CE_WARN, |
| 1041 | "xfs_difree: agbno >= mp->m_sb.sb_agblocks (%d >= %d) on %s. Returning EINVAL.", |
| 1042 | agbno, mp->m_sb.sb_agblocks, mp->m_fsname); |
| 1043 | ASSERT(0); |
| 1044 | return XFS_ERROR(EINVAL); |
| 1045 | } |
| 1046 | /* |
| 1047 | * Get the allocation group header. |
| 1048 | */ |
| 1049 | down_read(&mp->m_peraglock); |
| 1050 | error = xfs_ialloc_read_agi(mp, tp, agno, &agbp); |
| 1051 | up_read(&mp->m_peraglock); |
| 1052 | if (error) { |
| 1053 | cmn_err(CE_WARN, |
| 1054 | "xfs_difree: xfs_ialloc_read_agi() returned an error %d on %s. Returning error.", |
| 1055 | error, mp->m_fsname); |
| 1056 | return error; |
| 1057 | } |
| 1058 | agi = XFS_BUF_TO_AGI(agbp); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1059 | ASSERT(be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC); |
| 1060 | ASSERT(agbno < be32_to_cpu(agi->agi_length)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | /* |
| 1062 | * Initialize the cursor. |
| 1063 | */ |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 1064 | cur = xfs_inobt_init_cursor(mp, tp, agbp, agno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | #ifdef DEBUG |
| 1066 | if (cur->bc_nlevels == 1) { |
| 1067 | int freecount = 0; |
| 1068 | |
| 1069 | if ((error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i))) |
| 1070 | goto error0; |
| 1071 | do { |
| 1072 | if ((error = xfs_inobt_get_rec(cur, &rec.ir_startino, |
| 1073 | &rec.ir_freecount, &rec.ir_free, &i))) |
| 1074 | goto error0; |
| 1075 | if (i) { |
| 1076 | freecount += rec.ir_freecount; |
Christoph Hellwig | 637aa50 | 2008-10-30 16:55:45 +1100 | [diff] [blame] | 1077 | if ((error = xfs_btree_increment(cur, 0, &i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | goto error0; |
| 1079 | } |
| 1080 | } while (i == 1); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1081 | ASSERT(freecount == be32_to_cpu(agi->agi_freecount) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | XFS_FORCED_SHUTDOWN(mp)); |
| 1083 | } |
| 1084 | #endif |
| 1085 | /* |
| 1086 | * Look for the entry describing this inode. |
| 1087 | */ |
| 1088 | if ((error = xfs_inobt_lookup_le(cur, agino, 0, 0, &i))) { |
| 1089 | cmn_err(CE_WARN, |
| 1090 | "xfs_difree: xfs_inobt_lookup_le returned() an error %d on %s. Returning error.", |
| 1091 | error, mp->m_fsname); |
| 1092 | goto error0; |
| 1093 | } |
| 1094 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 1095 | if ((error = xfs_inobt_get_rec(cur, &rec.ir_startino, &rec.ir_freecount, |
| 1096 | &rec.ir_free, &i))) { |
| 1097 | cmn_err(CE_WARN, |
| 1098 | "xfs_difree: xfs_inobt_get_rec() returned an error %d on %s. Returning error.", |
| 1099 | error, mp->m_fsname); |
| 1100 | goto error0; |
| 1101 | } |
| 1102 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 1103 | /* |
| 1104 | * Get the offset in the inode chunk. |
| 1105 | */ |
| 1106 | off = agino - rec.ir_startino; |
| 1107 | ASSERT(off >= 0 && off < XFS_INODES_PER_CHUNK); |
| 1108 | ASSERT(!XFS_INOBT_IS_FREE(&rec, off)); |
| 1109 | /* |
| 1110 | * Mark the inode free & increment the count. |
| 1111 | */ |
| 1112 | XFS_INOBT_SET_FREE(&rec, off); |
| 1113 | rec.ir_freecount++; |
| 1114 | |
| 1115 | /* |
Nathan Scott | c41564b | 2006-03-29 08:55:14 +1000 | [diff] [blame] | 1116 | * When an inode cluster is free, it becomes eligible for removal |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | */ |
Josef Jeff Sipek | 1bd960e | 2008-02-29 13:58:40 +1100 | [diff] [blame] | 1118 | if (!(mp->m_flags & XFS_MOUNT_IKEEP) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | (rec.ir_freecount == XFS_IALLOC_INODES(mp))) { |
| 1120 | |
| 1121 | *delete = 1; |
| 1122 | *first_ino = XFS_AGINO_TO_INO(mp, agno, rec.ir_startino); |
| 1123 | |
| 1124 | /* |
| 1125 | * Remove the inode cluster from the AGI B+Tree, adjust the |
| 1126 | * AGI and Superblock inode counts, and mark the disk space |
| 1127 | * to be freed when the transaction is committed. |
| 1128 | */ |
| 1129 | ilen = XFS_IALLOC_INODES(mp); |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 1130 | be32_add_cpu(&agi->agi_count, -ilen); |
| 1131 | be32_add_cpu(&agi->agi_freecount, -(ilen - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | xfs_ialloc_log_agi(tp, agbp, XFS_AGI_COUNT | XFS_AGI_FREECOUNT); |
| 1133 | down_read(&mp->m_peraglock); |
| 1134 | mp->m_perag[agno].pagi_freecount -= ilen - 1; |
| 1135 | up_read(&mp->m_peraglock); |
| 1136 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_ICOUNT, -ilen); |
| 1137 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, -(ilen - 1)); |
| 1138 | |
Christoph Hellwig | 91cca5d | 2008-10-30 16:58:01 +1100 | [diff] [blame] | 1139 | if ((error = xfs_btree_delete(cur, &i))) { |
| 1140 | cmn_err(CE_WARN, "xfs_difree: xfs_btree_delete returned an error %d on %s.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | error, mp->m_fsname); |
| 1142 | goto error0; |
| 1143 | } |
| 1144 | |
| 1145 | xfs_bmap_add_free(XFS_AGB_TO_FSB(mp, |
| 1146 | agno, XFS_INO_TO_AGBNO(mp,rec.ir_startino)), |
| 1147 | XFS_IALLOC_BLOCKS(mp), flist, mp); |
| 1148 | } else { |
| 1149 | *delete = 0; |
| 1150 | |
| 1151 | if ((error = xfs_inobt_update(cur, rec.ir_startino, rec.ir_freecount, rec.ir_free))) { |
| 1152 | cmn_err(CE_WARN, |
| 1153 | "xfs_difree: xfs_inobt_update() returned an error %d on %s. Returning error.", |
| 1154 | error, mp->m_fsname); |
| 1155 | goto error0; |
| 1156 | } |
| 1157 | /* |
| 1158 | * Change the inode free counts and log the ag/sb changes. |
| 1159 | */ |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 1160 | be32_add_cpu(&agi->agi_freecount, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | xfs_ialloc_log_agi(tp, agbp, XFS_AGI_FREECOUNT); |
| 1162 | down_read(&mp->m_peraglock); |
| 1163 | mp->m_perag[agno].pagi_freecount++; |
| 1164 | up_read(&mp->m_peraglock); |
| 1165 | xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, 1); |
| 1166 | } |
| 1167 | |
| 1168 | #ifdef DEBUG |
| 1169 | if (cur->bc_nlevels == 1) { |
| 1170 | int freecount = 0; |
| 1171 | |
| 1172 | if ((error = xfs_inobt_lookup_ge(cur, 0, 0, 0, &i))) |
| 1173 | goto error0; |
| 1174 | do { |
| 1175 | if ((error = xfs_inobt_get_rec(cur, |
| 1176 | &rec.ir_startino, |
| 1177 | &rec.ir_freecount, |
| 1178 | &rec.ir_free, &i))) |
| 1179 | goto error0; |
| 1180 | if (i) { |
| 1181 | freecount += rec.ir_freecount; |
Christoph Hellwig | 637aa50 | 2008-10-30 16:55:45 +1100 | [diff] [blame] | 1182 | if ((error = xfs_btree_increment(cur, 0, &i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | goto error0; |
| 1184 | } |
| 1185 | } while (i == 1); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1186 | ASSERT(freecount == be32_to_cpu(agi->agi_freecount) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | XFS_FORCED_SHUTDOWN(mp)); |
| 1188 | } |
| 1189 | #endif |
| 1190 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); |
| 1191 | return 0; |
| 1192 | |
| 1193 | error0: |
| 1194 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); |
| 1195 | return error; |
| 1196 | } |
| 1197 | |
| 1198 | /* |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1199 | * Return the location of the inode in imap, for mapping it into a buffer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | int |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1202 | xfs_imap( |
| 1203 | xfs_mount_t *mp, /* file system mount structure */ |
| 1204 | xfs_trans_t *tp, /* transaction pointer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | xfs_ino_t ino, /* inode to locate */ |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1206 | struct xfs_imap *imap, /* location map structure */ |
| 1207 | uint flags) /* flags for inode btree lookup */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | { |
| 1209 | xfs_agblock_t agbno; /* block number of inode in the alloc group */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | xfs_agino_t agino; /* inode number within alloc group */ |
| 1211 | xfs_agnumber_t agno; /* allocation group number */ |
| 1212 | int blks_per_cluster; /* num blocks per inode cluster */ |
| 1213 | xfs_agblock_t chunk_agbno; /* first block in inode chunk */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | xfs_agblock_t cluster_agbno; /* first block in inode cluster */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | int error; /* error code */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | int offset; /* index of inode in its buffer */ |
| 1217 | int offset_agbno; /* blks from chunk start to inode */ |
| 1218 | |
| 1219 | ASSERT(ino != NULLFSINO); |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | /* |
| 1222 | * Split up the inode number into its parts. |
| 1223 | */ |
| 1224 | agno = XFS_INO_TO_AGNO(mp, ino); |
| 1225 | agino = XFS_INO_TO_AGINO(mp, ino); |
| 1226 | agbno = XFS_AGINO_TO_AGBNO(mp, agino); |
| 1227 | if (agno >= mp->m_sb.sb_agcount || agbno >= mp->m_sb.sb_agblocks || |
| 1228 | ino != XFS_AGINO_TO_INO(mp, agno, agino)) { |
| 1229 | #ifdef DEBUG |
Nathan Scott | 4d1a2ed | 2006-06-09 17:12:28 +1000 | [diff] [blame] | 1230 | /* no diagnostics for bulkstat, ino comes from userspace */ |
Christoph Hellwig | b48d8d6 | 2008-11-28 14:23:41 +1100 | [diff] [blame^] | 1231 | if (flags & XFS_IGET_BULKSTAT) |
Nathan Scott | 4d1a2ed | 2006-06-09 17:12:28 +1000 | [diff] [blame] | 1232 | return XFS_ERROR(EINVAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | if (agno >= mp->m_sb.sb_agcount) { |
| 1234 | xfs_fs_cmn_err(CE_ALERT, mp, |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1235 | "xfs_imap: agno (%d) >= " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | "mp->m_sb.sb_agcount (%d)", |
| 1237 | agno, mp->m_sb.sb_agcount); |
| 1238 | } |
| 1239 | if (agbno >= mp->m_sb.sb_agblocks) { |
| 1240 | xfs_fs_cmn_err(CE_ALERT, mp, |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1241 | "xfs_imap: agbno (0x%llx) >= " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | "mp->m_sb.sb_agblocks (0x%lx)", |
| 1243 | (unsigned long long) agbno, |
| 1244 | (unsigned long) mp->m_sb.sb_agblocks); |
| 1245 | } |
| 1246 | if (ino != XFS_AGINO_TO_INO(mp, agno, agino)) { |
| 1247 | xfs_fs_cmn_err(CE_ALERT, mp, |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1248 | "xfs_imap: ino (0x%llx) != " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | "XFS_AGINO_TO_INO(mp, agno, agino) " |
| 1250 | "(0x%llx)", |
| 1251 | ino, XFS_AGINO_TO_INO(mp, agno, agino)); |
| 1252 | } |
Nathan Scott | 745b1f47 | 2006-09-28 11:02:23 +1000 | [diff] [blame] | 1253 | xfs_stack_trace(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | #endif /* DEBUG */ |
| 1255 | return XFS_ERROR(EINVAL); |
| 1256 | } |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1257 | |
| 1258 | /* |
| 1259 | * If the inode cluster size is the same as the blocksize or |
| 1260 | * smaller we get to the buffer by simple arithmetics. |
| 1261 | */ |
| 1262 | if (XFS_INODE_CLUSTER_SIZE(mp) <= mp->m_sb.sb_blocksize) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | offset = XFS_INO_TO_OFFSET(mp, ino); |
| 1264 | ASSERT(offset < mp->m_sb.sb_inopblock); |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1265 | |
| 1266 | imap->im_blkno = XFS_AGB_TO_DADDR(mp, agno, agbno); |
| 1267 | imap->im_len = XFS_FSB_TO_BB(mp, 1); |
| 1268 | imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | return 0; |
| 1270 | } |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | blks_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_blocklog; |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1273 | |
| 1274 | /* |
| 1275 | * If we get a block number passed from bulkstat we can use it to |
| 1276 | * find the buffer easily. |
| 1277 | */ |
| 1278 | if (imap->im_blkno) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | offset = XFS_INO_TO_OFFSET(mp, ino); |
| 1280 | ASSERT(offset < mp->m_sb.sb_inopblock); |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1281 | |
| 1282 | cluster_agbno = XFS_DADDR_TO_AGBNO(mp, imap->im_blkno); |
| 1283 | offset += (agbno - cluster_agbno) * mp->m_sb.sb_inopblock; |
| 1284 | |
| 1285 | imap->im_len = XFS_FSB_TO_BB(mp, blks_per_cluster); |
| 1286 | imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | return 0; |
| 1288 | } |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1289 | |
| 1290 | /* |
| 1291 | * If the inode chunks are aligned then use simple maths to |
| 1292 | * find the location. Otherwise we have to do a btree |
| 1293 | * lookup to find the location. |
| 1294 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | if (mp->m_inoalign_mask) { |
| 1296 | offset_agbno = agbno & mp->m_inoalign_mask; |
| 1297 | chunk_agbno = agbno - offset_agbno; |
| 1298 | } else { |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1299 | xfs_btree_cur_t *cur; /* inode btree cursor */ |
| 1300 | xfs_agino_t chunk_agino; /* first agino in inode chunk */ |
| 1301 | __int32_t chunk_cnt; /* count of free inodes in chunk */ |
| 1302 | xfs_inofree_t chunk_free; /* mask of free inodes in chunk */ |
| 1303 | xfs_buf_t *agbp; /* agi buffer */ |
| 1304 | int i; /* temp state */ |
| 1305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | down_read(&mp->m_peraglock); |
| 1307 | error = xfs_ialloc_read_agi(mp, tp, agno, &agbp); |
| 1308 | up_read(&mp->m_peraglock); |
| 1309 | if (error) { |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1310 | xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | "xfs_ialloc_read_agi() returned " |
| 1312 | "error %d, agno %d", |
| 1313 | error, agno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | return error; |
| 1315 | } |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1316 | |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 1317 | cur = xfs_inobt_init_cursor(mp, tp, agbp, agno); |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1318 | error = xfs_inobt_lookup_le(cur, agino, 0, 0, &i); |
| 1319 | if (error) { |
| 1320 | xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | "xfs_inobt_lookup_le() failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | goto error0; |
| 1323 | } |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1324 | |
| 1325 | error = xfs_inobt_get_rec(cur, &chunk_agino, &chunk_cnt, |
| 1326 | &chunk_free, &i); |
| 1327 | if (error) { |
| 1328 | xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | "xfs_inobt_get_rec() failed"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | goto error0; |
| 1331 | } |
| 1332 | if (i == 0) { |
| 1333 | #ifdef DEBUG |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1334 | xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | "xfs_inobt_get_rec() failed"); |
| 1336 | #endif /* DEBUG */ |
| 1337 | error = XFS_ERROR(EINVAL); |
| 1338 | } |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1339 | error0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | xfs_trans_brelse(tp, agbp); |
| 1341 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); |
| 1342 | if (error) |
| 1343 | return error; |
| 1344 | chunk_agbno = XFS_AGINO_TO_AGBNO(mp, chunk_agino); |
| 1345 | offset_agbno = agbno - chunk_agbno; |
| 1346 | } |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | ASSERT(agbno >= chunk_agbno); |
| 1349 | cluster_agbno = chunk_agbno + |
| 1350 | ((offset_agbno / blks_per_cluster) * blks_per_cluster); |
| 1351 | offset = ((agbno - cluster_agbno) * mp->m_sb.sb_inopblock) + |
| 1352 | XFS_INO_TO_OFFSET(mp, ino); |
Christoph Hellwig | 94e1b69 | 2008-11-28 14:23:41 +1100 | [diff] [blame] | 1353 | |
| 1354 | imap->im_blkno = XFS_AGB_TO_DADDR(mp, agno, cluster_agbno); |
| 1355 | imap->im_len = XFS_FSB_TO_BB(mp, blks_per_cluster); |
| 1356 | imap->im_boffset = (ushort)(offset << mp->m_sb.sb_inodelog); |
| 1357 | |
| 1358 | /* |
| 1359 | * If the inode number maps to a block outside the bounds |
| 1360 | * of the file system then return NULL rather than calling |
| 1361 | * read_buf and panicing when we get an error from the |
| 1362 | * driver. |
| 1363 | */ |
| 1364 | if ((imap->im_blkno + imap->im_len) > |
| 1365 | XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)) { |
| 1366 | xfs_fs_cmn_err(CE_ALERT, mp, "xfs_imap: " |
| 1367 | "(imap->im_blkno (0x%llx) + imap->im_len (0x%llx)) > " |
| 1368 | " XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) (0x%llx)", |
| 1369 | (unsigned long long) imap->im_blkno, |
| 1370 | (unsigned long long) imap->im_len, |
| 1371 | XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)); |
| 1372 | return XFS_ERROR(EINVAL); |
| 1373 | } |
| 1374 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | } |
| 1377 | |
| 1378 | /* |
| 1379 | * Compute and fill in value of m_in_maxlevels. |
| 1380 | */ |
| 1381 | void |
| 1382 | xfs_ialloc_compute_maxlevels( |
| 1383 | xfs_mount_t *mp) /* file system mount structure */ |
| 1384 | { |
| 1385 | int level; |
| 1386 | uint maxblocks; |
| 1387 | uint maxleafents; |
| 1388 | int minleafrecs; |
| 1389 | int minnoderecs; |
| 1390 | |
| 1391 | maxleafents = (1LL << XFS_INO_AGINO_BITS(mp)) >> |
| 1392 | XFS_INODES_PER_CHUNK_LOG; |
| 1393 | minleafrecs = mp->m_alloc_mnr[0]; |
| 1394 | minnoderecs = mp->m_alloc_mnr[1]; |
| 1395 | maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; |
| 1396 | for (level = 1; maxblocks > 1; level++) |
| 1397 | maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; |
| 1398 | mp->m_in_maxlevels = level; |
| 1399 | } |
| 1400 | |
| 1401 | /* |
| 1402 | * Log specified fields for the ag hdr (inode section) |
| 1403 | */ |
| 1404 | void |
| 1405 | xfs_ialloc_log_agi( |
| 1406 | xfs_trans_t *tp, /* transaction pointer */ |
| 1407 | xfs_buf_t *bp, /* allocation group header buffer */ |
| 1408 | int fields) /* bitmask of fields to log */ |
| 1409 | { |
| 1410 | int first; /* first byte number */ |
| 1411 | int last; /* last byte number */ |
| 1412 | static const short offsets[] = { /* field starting offsets */ |
| 1413 | /* keep in sync with bit definitions */ |
| 1414 | offsetof(xfs_agi_t, agi_magicnum), |
| 1415 | offsetof(xfs_agi_t, agi_versionnum), |
| 1416 | offsetof(xfs_agi_t, agi_seqno), |
| 1417 | offsetof(xfs_agi_t, agi_length), |
| 1418 | offsetof(xfs_agi_t, agi_count), |
| 1419 | offsetof(xfs_agi_t, agi_root), |
| 1420 | offsetof(xfs_agi_t, agi_level), |
| 1421 | offsetof(xfs_agi_t, agi_freecount), |
| 1422 | offsetof(xfs_agi_t, agi_newino), |
| 1423 | offsetof(xfs_agi_t, agi_dirino), |
| 1424 | offsetof(xfs_agi_t, agi_unlinked), |
| 1425 | sizeof(xfs_agi_t) |
| 1426 | }; |
| 1427 | #ifdef DEBUG |
| 1428 | xfs_agi_t *agi; /* allocation group header */ |
| 1429 | |
| 1430 | agi = XFS_BUF_TO_AGI(bp); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1431 | ASSERT(be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | #endif |
| 1433 | /* |
| 1434 | * Compute byte offsets for the first and last fields. |
| 1435 | */ |
| 1436 | xfs_btree_offsets(fields, offsets, XFS_AGI_NUM_BITS, &first, &last); |
| 1437 | /* |
| 1438 | * Log the allocation group inode header buffer. |
| 1439 | */ |
| 1440 | xfs_trans_log_buf(tp, bp, first, last); |
| 1441 | } |
| 1442 | |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1443 | #ifdef DEBUG |
| 1444 | STATIC void |
| 1445 | xfs_check_agi_unlinked( |
| 1446 | struct xfs_agi *agi) |
| 1447 | { |
| 1448 | int i; |
| 1449 | |
| 1450 | for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) |
| 1451 | ASSERT(agi->agi_unlinked[i]); |
| 1452 | } |
| 1453 | #else |
| 1454 | #define xfs_check_agi_unlinked(agi) |
| 1455 | #endif |
| 1456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | /* |
| 1458 | * Read in the allocation group header (inode allocation section) |
| 1459 | */ |
| 1460 | int |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1461 | xfs_read_agi( |
| 1462 | struct xfs_mount *mp, /* file system mount structure */ |
| 1463 | struct xfs_trans *tp, /* transaction pointer */ |
| 1464 | xfs_agnumber_t agno, /* allocation group number */ |
| 1465 | struct xfs_buf **bpp) /* allocation group hdr buf */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | { |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1467 | struct xfs_agi *agi; /* allocation group header */ |
| 1468 | int agi_ok; /* agi is consistent */ |
| 1469 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | |
| 1471 | ASSERT(agno != NULLAGNUMBER); |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1472 | |
| 1473 | error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | XFS_AG_DADDR(mp, agno, XFS_AGI_DADDR(mp)), |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1475 | XFS_FSS_TO_BB(mp, 1), 0, bpp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | if (error) |
| 1477 | return error; |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1478 | |
| 1479 | ASSERT(*bpp && !XFS_BUF_GETERROR(*bpp)); |
| 1480 | agi = XFS_BUF_TO_AGI(*bpp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | |
| 1482 | /* |
| 1483 | * Validate the magic number of the agi block. |
| 1484 | */ |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1485 | agi_ok = be32_to_cpu(agi->agi_magicnum) == XFS_AGI_MAGIC && |
| 1486 | XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)) && |
| 1487 | be32_to_cpu(agi->agi_seqno) == agno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | if (unlikely(XFS_TEST_ERROR(!agi_ok, mp, XFS_ERRTAG_IALLOC_READ_AGI, |
| 1489 | XFS_RANDOM_IALLOC_READ_AGI))) { |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1490 | XFS_CORRUPTION_ERROR("xfs_read_agi", XFS_ERRLEVEL_LOW, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | mp, agi); |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1492 | xfs_trans_brelse(tp, *bpp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | return XFS_ERROR(EFSCORRUPTED); |
| 1494 | } |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1495 | |
| 1496 | XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_AGI, XFS_AGI_REF); |
| 1497 | |
| 1498 | xfs_check_agi_unlinked(agi); |
| 1499 | return 0; |
| 1500 | } |
| 1501 | |
| 1502 | int |
| 1503 | xfs_ialloc_read_agi( |
| 1504 | struct xfs_mount *mp, /* file system mount structure */ |
| 1505 | struct xfs_trans *tp, /* transaction pointer */ |
| 1506 | xfs_agnumber_t agno, /* allocation group number */ |
| 1507 | struct xfs_buf **bpp) /* allocation group hdr buf */ |
| 1508 | { |
| 1509 | struct xfs_agi *agi; /* allocation group header */ |
| 1510 | struct xfs_perag *pag; /* per allocation group data */ |
| 1511 | int error; |
| 1512 | |
| 1513 | error = xfs_read_agi(mp, tp, agno, bpp); |
| 1514 | if (error) |
| 1515 | return error; |
| 1516 | |
| 1517 | agi = XFS_BUF_TO_AGI(*bpp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | pag = &mp->m_perag[agno]; |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | if (!pag->pagi_init) { |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1521 | pag->pagi_freecount = be32_to_cpu(agi->agi_freecount); |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1522 | pag->pagi_count = be32_to_cpu(agi->agi_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | pag->pagi_init = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | } |
| 1525 | |
Christoph Hellwig | 5e1be0f | 2008-11-28 14:23:37 +1100 | [diff] [blame] | 1526 | /* |
| 1527 | * It's possible for these to be out of sync if |
| 1528 | * we are in the middle of a forced shutdown. |
| 1529 | */ |
| 1530 | ASSERT(pag->pagi_freecount == be32_to_cpu(agi->agi_freecount) || |
| 1531 | XFS_FORCED_SHUTDOWN(mp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | return 0; |
| 1533 | } |
David Chinner | 92821e2 | 2007-05-24 15:26:31 +1000 | [diff] [blame] | 1534 | |
| 1535 | /* |
| 1536 | * Read in the agi to initialise the per-ag data in the mount structure |
| 1537 | */ |
| 1538 | int |
| 1539 | xfs_ialloc_pagi_init( |
| 1540 | xfs_mount_t *mp, /* file system mount structure */ |
| 1541 | xfs_trans_t *tp, /* transaction pointer */ |
| 1542 | xfs_agnumber_t agno) /* allocation group number */ |
| 1543 | { |
| 1544 | xfs_buf_t *bp = NULL; |
| 1545 | int error; |
| 1546 | |
| 1547 | error = xfs_ialloc_read_agi(mp, tp, agno, &bp); |
| 1548 | if (error) |
| 1549 | return error; |
| 1550 | if (bp) |
| 1551 | xfs_trans_brelse(tp, bp); |
| 1552 | return 0; |
| 1553 | } |