Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 19 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 21 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_trans.h" |
| 25 | #include "xfs_sb.h" |
| 26 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_dir2.h" |
| 28 | #include "xfs_dmapi.h" |
| 29 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_bmap_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 31 | #include "xfs_alloc_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_ialloc_btree.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 33 | #include "xfs_dir2_sf.h" |
| 34 | #include "xfs_attr_sf.h" |
| 35 | #include "xfs_dinode.h" |
| 36 | #include "xfs_inode.h" |
| 37 | #include "xfs_inode_item.h" |
| 38 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include "xfs_btree.h" |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 40 | #include "xfs_btree_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include "xfs_ialloc.h" |
| 42 | #include "xfs_itable.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include "xfs_bmap.h" |
| 44 | #include "xfs_error.h" |
| 45 | #include "xfs_quota.h" |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | /* |
| 48 | * Prototypes for internal btree functions. |
| 49 | */ |
| 50 | |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | STATIC void xfs_bmbt_log_keys(xfs_btree_cur_t *, xfs_buf_t *, int, int); |
| 53 | STATIC void xfs_bmbt_log_ptrs(xfs_btree_cur_t *, xfs_buf_t *, int, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | #undef EXIT |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 56 | |
| 57 | #define ENTRY XBT_ENTRY |
| 58 | #define ERROR XBT_ERROR |
| 59 | #define EXIT XBT_EXIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | /* |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 62 | * Keep the XFS_BMBT_TRACE_ names around for now until all code using them |
| 63 | * is converted to be generic and thus switches to the XFS_BTREE_TRACE_ names. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | */ |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 65 | #define XFS_BMBT_TRACE_ARGBI(c,b,i) \ |
| 66 | XFS_BTREE_TRACE_ARGBI(c,b,i) |
| 67 | #define XFS_BMBT_TRACE_ARGBII(c,b,i,j) \ |
| 68 | XFS_BTREE_TRACE_ARGBII(c,b,i,j) |
| 69 | #define XFS_BMBT_TRACE_ARGFFFI(c,o,b,i,j) \ |
| 70 | XFS_BTREE_TRACE_ARGFFFI(c,o,b,i,j) |
| 71 | #define XFS_BMBT_TRACE_ARGI(c,i) \ |
| 72 | XFS_BTREE_TRACE_ARGI(c,i) |
| 73 | #define XFS_BMBT_TRACE_ARGIFK(c,i,f,s) \ |
| 74 | XFS_BTREE_TRACE_ARGIPK(c,i,(union xfs_btree_ptr)f,s) |
| 75 | #define XFS_BMBT_TRACE_ARGIFR(c,i,f,r) \ |
| 76 | XFS_BTREE_TRACE_ARGIPR(c,i, \ |
| 77 | (union xfs_btree_ptr)f, (union xfs_btree_rec *)r) |
| 78 | #define XFS_BMBT_TRACE_ARGIK(c,i,k) \ |
| 79 | XFS_BTREE_TRACE_ARGIK(c,i,(union xfs_btree_key *)k) |
| 80 | #define XFS_BMBT_TRACE_CURSOR(c,s) \ |
| 81 | XFS_BTREE_TRACE_CURSOR(c,s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | |
| 84 | /* |
| 85 | * Internal functions. |
| 86 | */ |
| 87 | |
| 88 | /* |
| 89 | * Delete record pointed to by cur/level. |
| 90 | */ |
| 91 | STATIC int /* error */ |
| 92 | xfs_bmbt_delrec( |
| 93 | xfs_btree_cur_t *cur, |
| 94 | int level, |
| 95 | int *stat) /* success/failure */ |
| 96 | { |
| 97 | xfs_bmbt_block_t *block; /* bmap btree block */ |
| 98 | xfs_fsblock_t bno; /* fs-relative block number */ |
| 99 | xfs_buf_t *bp; /* buffer for block */ |
| 100 | int error; /* error return value */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | int i; /* loop counter */ |
| 102 | int j; /* temp state */ |
| 103 | xfs_bmbt_key_t key; /* bmap btree key */ |
| 104 | xfs_bmbt_key_t *kp=NULL; /* pointer to bmap btree key */ |
| 105 | xfs_fsblock_t lbno; /* left sibling block number */ |
| 106 | xfs_buf_t *lbp; /* left buffer pointer */ |
| 107 | xfs_bmbt_block_t *left; /* left btree block */ |
| 108 | xfs_bmbt_key_t *lkp; /* left btree key */ |
| 109 | xfs_bmbt_ptr_t *lpp; /* left address pointer */ |
| 110 | int lrecs=0; /* left record count */ |
| 111 | xfs_bmbt_rec_t *lrp; /* left record pointer */ |
| 112 | xfs_mount_t *mp; /* file system mount point */ |
| 113 | xfs_bmbt_ptr_t *pp; /* pointer to bmap block addr */ |
| 114 | int ptr; /* key/record index */ |
| 115 | xfs_fsblock_t rbno; /* right sibling block number */ |
| 116 | xfs_buf_t *rbp; /* right buffer pointer */ |
| 117 | xfs_bmbt_block_t *right; /* right btree block */ |
| 118 | xfs_bmbt_key_t *rkp; /* right btree key */ |
| 119 | xfs_bmbt_rec_t *rp; /* pointer to bmap btree rec */ |
| 120 | xfs_bmbt_ptr_t *rpp; /* right address pointer */ |
| 121 | xfs_bmbt_block_t *rrblock; /* right-right btree block */ |
| 122 | xfs_buf_t *rrbp; /* right-right buffer pointer */ |
| 123 | int rrecs=0; /* right record count */ |
| 124 | xfs_bmbt_rec_t *rrp; /* right record pointer */ |
| 125 | xfs_btree_cur_t *tcur; /* temporary btree cursor */ |
| 126 | int numrecs; /* temporary numrec count */ |
| 127 | int numlrecs, numrrecs; |
| 128 | |
| 129 | XFS_BMBT_TRACE_CURSOR(cur, ENTRY); |
| 130 | XFS_BMBT_TRACE_ARGI(cur, level); |
| 131 | ptr = cur->bc_ptrs[level]; |
Nathan Scott | 1121b21 | 2006-09-28 10:58:40 +1000 | [diff] [blame] | 132 | tcur = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | if (ptr == 0) { |
| 134 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 135 | *stat = 0; |
| 136 | return 0; |
| 137 | } |
| 138 | block = xfs_bmbt_get_block(cur, level, &bp); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 139 | numrecs = be16_to_cpu(block->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | #ifdef DEBUG |
| 141 | if ((error = xfs_btree_check_lblock(cur, block, level, bp))) { |
| 142 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 143 | goto error0; |
| 144 | } |
| 145 | #endif |
| 146 | if (ptr > numrecs) { |
| 147 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 148 | *stat = 0; |
| 149 | return 0; |
| 150 | } |
| 151 | XFS_STATS_INC(xs_bmbt_delrec); |
| 152 | if (level > 0) { |
| 153 | kp = XFS_BMAP_KEY_IADDR(block, 1, cur); |
| 154 | pp = XFS_BMAP_PTR_IADDR(block, 1, cur); |
| 155 | #ifdef DEBUG |
| 156 | for (i = ptr; i < numrecs; i++) { |
Christoph Hellwig | b113bcb | 2006-09-28 10:57:42 +1000 | [diff] [blame] | 157 | if ((error = xfs_btree_check_lptr_disk(cur, pp[i], level))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 159 | goto error0; |
| 160 | } |
| 161 | } |
| 162 | #endif |
| 163 | if (ptr < numrecs) { |
| 164 | memmove(&kp[ptr - 1], &kp[ptr], |
| 165 | (numrecs - ptr) * sizeof(*kp)); |
Christoph Hellwig | d580ef6 | 2007-08-16 16:23:11 +1000 | [diff] [blame] | 166 | memmove(&pp[ptr - 1], &pp[ptr], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | (numrecs - ptr) * sizeof(*pp)); |
| 168 | xfs_bmbt_log_ptrs(cur, bp, ptr, numrecs - 1); |
| 169 | xfs_bmbt_log_keys(cur, bp, ptr, numrecs - 1); |
| 170 | } |
| 171 | } else { |
| 172 | rp = XFS_BMAP_REC_IADDR(block, 1, cur); |
| 173 | if (ptr < numrecs) { |
| 174 | memmove(&rp[ptr - 1], &rp[ptr], |
| 175 | (numrecs - ptr) * sizeof(*rp)); |
| 176 | xfs_bmbt_log_recs(cur, bp, ptr, numrecs - 1); |
| 177 | } |
| 178 | if (ptr == 1) { |
Christoph Hellwig | 8801bb9 | 2006-09-28 10:58:17 +1000 | [diff] [blame] | 179 | key.br_startoff = |
| 180 | cpu_to_be64(xfs_bmbt_disk_get_startoff(rp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | kp = &key; |
| 182 | } |
| 183 | } |
| 184 | numrecs--; |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 185 | block->bb_numrecs = cpu_to_be16(numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | xfs_bmbt_log_block(cur, bp, XFS_BB_NUMRECS); |
| 187 | /* |
| 188 | * We're at the root level. |
| 189 | * First, shrink the root block in-memory. |
| 190 | * Try to get rid of the next level down. |
| 191 | * If we can't then there's nothing left to do. |
| 192 | */ |
| 193 | if (level == cur->bc_nlevels - 1) { |
| 194 | xfs_iroot_realloc(cur->bc_private.b.ip, -1, |
| 195 | cur->bc_private.b.whichfork); |
Christoph Hellwig | d4b3a4b | 2008-10-30 16:57:51 +1100 | [diff] [blame^] | 196 | if ((error = xfs_btree_kill_iroot(cur))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 198 | goto error0; |
| 199 | } |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 200 | if (level > 0 && (error = xfs_btree_decrement(cur, level, &j))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 202 | goto error0; |
| 203 | } |
| 204 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 205 | *stat = 1; |
| 206 | return 0; |
| 207 | } |
Christoph Hellwig | 38bb742 | 2008-10-30 16:56:22 +1100 | [diff] [blame] | 208 | if (ptr == 1 && (error = xfs_btree_updkey(cur, (union xfs_btree_key *)kp, level + 1))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 210 | goto error0; |
| 211 | } |
| 212 | if (numrecs >= XFS_BMAP_BLOCK_IMINRECS(level, cur)) { |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 213 | if (level > 0 && (error = xfs_btree_decrement(cur, level, &j))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 215 | goto error0; |
| 216 | } |
| 217 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 218 | *stat = 1; |
| 219 | return 0; |
| 220 | } |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 221 | rbno = be64_to_cpu(block->bb_rightsib); |
| 222 | lbno = be64_to_cpu(block->bb_leftsib); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | /* |
| 224 | * One child of root, need to get a chance to copy its contents |
| 225 | * into the root and delete it. Can't go up to next level, |
| 226 | * there's nothing to delete there. |
| 227 | */ |
| 228 | if (lbno == NULLFSBLOCK && rbno == NULLFSBLOCK && |
| 229 | level == cur->bc_nlevels - 2) { |
Christoph Hellwig | d4b3a4b | 2008-10-30 16:57:51 +1100 | [diff] [blame^] | 230 | if ((error = xfs_btree_kill_iroot(cur))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 232 | goto error0; |
| 233 | } |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 234 | if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 236 | goto error0; |
| 237 | } |
| 238 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 239 | *stat = 1; |
| 240 | return 0; |
| 241 | } |
| 242 | ASSERT(rbno != NULLFSBLOCK || lbno != NULLFSBLOCK); |
| 243 | if ((error = xfs_btree_dup_cursor(cur, &tcur))) { |
| 244 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 245 | goto error0; |
| 246 | } |
| 247 | bno = NULLFSBLOCK; |
| 248 | if (rbno != NULLFSBLOCK) { |
| 249 | i = xfs_btree_lastrec(tcur, level); |
| 250 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
Christoph Hellwig | 637aa50 | 2008-10-30 16:55:45 +1100 | [diff] [blame] | 251 | if ((error = xfs_btree_increment(tcur, level, &i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 253 | goto error0; |
| 254 | } |
| 255 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 256 | i = xfs_btree_lastrec(tcur, level); |
| 257 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 258 | rbp = tcur->bc_bufs[level]; |
| 259 | right = XFS_BUF_TO_BMBT_BLOCK(rbp); |
| 260 | #ifdef DEBUG |
| 261 | if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) { |
| 262 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 263 | goto error0; |
| 264 | } |
| 265 | #endif |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 266 | bno = be64_to_cpu(right->bb_leftsib); |
| 267 | if (be16_to_cpu(right->bb_numrecs) - 1 >= |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | XFS_BMAP_BLOCK_IMINRECS(level, cur)) { |
Christoph Hellwig | 687b890 | 2008-10-30 16:56:53 +1100 | [diff] [blame] | 269 | if ((error = xfs_btree_lshift(tcur, level, &i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 271 | goto error0; |
| 272 | } |
| 273 | if (i) { |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 274 | ASSERT(be16_to_cpu(block->bb_numrecs) >= |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | XFS_BMAP_BLOCK_IMINRECS(level, tcur)); |
| 276 | xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); |
| 277 | tcur = NULL; |
| 278 | if (level > 0) { |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 279 | if ((error = xfs_btree_decrement(cur, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | level, &i))) { |
| 281 | XFS_BMBT_TRACE_CURSOR(cur, |
| 282 | ERROR); |
| 283 | goto error0; |
| 284 | } |
| 285 | } |
| 286 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 287 | *stat = 1; |
| 288 | return 0; |
| 289 | } |
| 290 | } |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 291 | rrecs = be16_to_cpu(right->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | if (lbno != NULLFSBLOCK) { |
| 293 | i = xfs_btree_firstrec(tcur, level); |
| 294 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 295 | if ((error = xfs_btree_decrement(tcur, level, &i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 297 | goto error0; |
| 298 | } |
| 299 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 300 | } |
| 301 | } |
| 302 | if (lbno != NULLFSBLOCK) { |
| 303 | i = xfs_btree_firstrec(tcur, level); |
| 304 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 305 | /* |
| 306 | * decrement to last in block |
| 307 | */ |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 308 | if ((error = xfs_btree_decrement(tcur, level, &i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 310 | goto error0; |
| 311 | } |
| 312 | i = xfs_btree_firstrec(tcur, level); |
| 313 | XFS_WANT_CORRUPTED_GOTO(i == 1, error0); |
| 314 | lbp = tcur->bc_bufs[level]; |
| 315 | left = XFS_BUF_TO_BMBT_BLOCK(lbp); |
| 316 | #ifdef DEBUG |
| 317 | if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) { |
| 318 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 319 | goto error0; |
| 320 | } |
| 321 | #endif |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 322 | bno = be64_to_cpu(left->bb_rightsib); |
| 323 | if (be16_to_cpu(left->bb_numrecs) - 1 >= |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | XFS_BMAP_BLOCK_IMINRECS(level, cur)) { |
Christoph Hellwig | 9eaead5 | 2008-10-30 16:56:43 +1100 | [diff] [blame] | 325 | if ((error = xfs_btree_rshift(tcur, level, &i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 327 | goto error0; |
| 328 | } |
| 329 | if (i) { |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 330 | ASSERT(be16_to_cpu(block->bb_numrecs) >= |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | XFS_BMAP_BLOCK_IMINRECS(level, tcur)); |
| 332 | xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); |
| 333 | tcur = NULL; |
| 334 | if (level == 0) |
| 335 | cur->bc_ptrs[0]++; |
| 336 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 337 | *stat = 1; |
| 338 | return 0; |
| 339 | } |
| 340 | } |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 341 | lrecs = be16_to_cpu(left->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
| 343 | xfs_btree_del_cursor(tcur, XFS_BTREE_NOERROR); |
| 344 | tcur = NULL; |
| 345 | mp = cur->bc_mp; |
| 346 | ASSERT(bno != NULLFSBLOCK); |
| 347 | if (lbno != NULLFSBLOCK && |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 348 | lrecs + be16_to_cpu(block->bb_numrecs) <= XFS_BMAP_BLOCK_IMAXRECS(level, cur)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | rbno = bno; |
| 350 | right = block; |
| 351 | rbp = bp; |
| 352 | if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, lbno, 0, &lbp, |
| 353 | XFS_BMAP_BTREE_REF))) { |
| 354 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 355 | goto error0; |
| 356 | } |
| 357 | left = XFS_BUF_TO_BMBT_BLOCK(lbp); |
| 358 | if ((error = xfs_btree_check_lblock(cur, left, level, lbp))) { |
| 359 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 360 | goto error0; |
| 361 | } |
| 362 | } else if (rbno != NULLFSBLOCK && |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 363 | rrecs + be16_to_cpu(block->bb_numrecs) <= |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | XFS_BMAP_BLOCK_IMAXRECS(level, cur)) { |
| 365 | lbno = bno; |
| 366 | left = block; |
| 367 | lbp = bp; |
| 368 | if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, rbno, 0, &rbp, |
| 369 | XFS_BMAP_BTREE_REF))) { |
| 370 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 371 | goto error0; |
| 372 | } |
| 373 | right = XFS_BUF_TO_BMBT_BLOCK(rbp); |
| 374 | if ((error = xfs_btree_check_lblock(cur, right, level, rbp))) { |
| 375 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 376 | goto error0; |
| 377 | } |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 378 | lrecs = be16_to_cpu(left->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | } else { |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 380 | if (level > 0 && (error = xfs_btree_decrement(cur, level, &i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 382 | goto error0; |
| 383 | } |
| 384 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 385 | *stat = 1; |
| 386 | return 0; |
| 387 | } |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 388 | numlrecs = be16_to_cpu(left->bb_numrecs); |
| 389 | numrrecs = be16_to_cpu(right->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | if (level > 0) { |
| 391 | lkp = XFS_BMAP_KEY_IADDR(left, numlrecs + 1, cur); |
| 392 | lpp = XFS_BMAP_PTR_IADDR(left, numlrecs + 1, cur); |
| 393 | rkp = XFS_BMAP_KEY_IADDR(right, 1, cur); |
| 394 | rpp = XFS_BMAP_PTR_IADDR(right, 1, cur); |
| 395 | #ifdef DEBUG |
| 396 | for (i = 0; i < numrrecs; i++) { |
Christoph Hellwig | b113bcb | 2006-09-28 10:57:42 +1000 | [diff] [blame] | 397 | if ((error = xfs_btree_check_lptr_disk(cur, rpp[i], level))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 399 | goto error0; |
| 400 | } |
| 401 | } |
| 402 | #endif |
| 403 | memcpy(lkp, rkp, numrrecs * sizeof(*lkp)); |
| 404 | memcpy(lpp, rpp, numrrecs * sizeof(*lpp)); |
| 405 | xfs_bmbt_log_keys(cur, lbp, numlrecs + 1, numlrecs + numrrecs); |
| 406 | xfs_bmbt_log_ptrs(cur, lbp, numlrecs + 1, numlrecs + numrrecs); |
| 407 | } else { |
| 408 | lrp = XFS_BMAP_REC_IADDR(left, numlrecs + 1, cur); |
| 409 | rrp = XFS_BMAP_REC_IADDR(right, 1, cur); |
| 410 | memcpy(lrp, rrp, numrrecs * sizeof(*lrp)); |
| 411 | xfs_bmbt_log_recs(cur, lbp, numlrecs + 1, numlrecs + numrrecs); |
| 412 | } |
Marcin Slusarz | 413d57c | 2008-02-13 15:03:29 -0800 | [diff] [blame] | 413 | be16_add_cpu(&left->bb_numrecs, numrrecs); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 414 | left->bb_rightsib = right->bb_rightsib; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | xfs_bmbt_log_block(cur, lbp, XFS_BB_RIGHTSIB | XFS_BB_NUMRECS); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 416 | if (be64_to_cpu(left->bb_rightsib) != NULLDFSBNO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | if ((error = xfs_btree_read_bufl(mp, cur->bc_tp, |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 418 | be64_to_cpu(left->bb_rightsib), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | 0, &rrbp, XFS_BMAP_BTREE_REF))) { |
| 420 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 421 | goto error0; |
| 422 | } |
| 423 | rrblock = XFS_BUF_TO_BMBT_BLOCK(rrbp); |
| 424 | if ((error = xfs_btree_check_lblock(cur, rrblock, level, rrbp))) { |
| 425 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 426 | goto error0; |
| 427 | } |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 428 | rrblock->bb_leftsib = cpu_to_be64(lbno); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | xfs_bmbt_log_block(cur, rrbp, XFS_BB_LEFTSIB); |
| 430 | } |
| 431 | xfs_bmap_add_free(XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(rbp)), 1, |
| 432 | cur->bc_private.b.flist, mp); |
| 433 | cur->bc_private.b.ip->i_d.di_nblocks--; |
| 434 | xfs_trans_log_inode(cur->bc_tp, cur->bc_private.b.ip, XFS_ILOG_CORE); |
| 435 | XFS_TRANS_MOD_DQUOT_BYINO(mp, cur->bc_tp, cur->bc_private.b.ip, |
| 436 | XFS_TRANS_DQ_BCOUNT, -1L); |
| 437 | xfs_trans_binval(cur->bc_tp, rbp); |
| 438 | if (bp != lbp) { |
| 439 | cur->bc_bufs[level] = lbp; |
| 440 | cur->bc_ptrs[level] += lrecs; |
| 441 | cur->bc_ra[level] = 0; |
Christoph Hellwig | 637aa50 | 2008-10-30 16:55:45 +1100 | [diff] [blame] | 442 | } else if ((error = xfs_btree_increment(cur, level + 1, &i))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 444 | goto error0; |
| 445 | } |
| 446 | if (level > 0) |
| 447 | cur->bc_ptrs[level]--; |
| 448 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 449 | *stat = 2; |
| 450 | return 0; |
| 451 | |
| 452 | error0: |
| 453 | if (tcur) |
| 454 | xfs_btree_del_cursor(tcur, XFS_BTREE_ERROR); |
| 455 | return error; |
| 456 | } |
| 457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | /* |
| 459 | * Log key values from the btree block. |
| 460 | */ |
| 461 | STATIC void |
| 462 | xfs_bmbt_log_keys( |
| 463 | xfs_btree_cur_t *cur, |
| 464 | xfs_buf_t *bp, |
| 465 | int kfirst, |
| 466 | int klast) |
| 467 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | xfs_trans_t *tp; |
| 469 | |
| 470 | XFS_BMBT_TRACE_CURSOR(cur, ENTRY); |
| 471 | XFS_BMBT_TRACE_ARGBII(cur, bp, kfirst, klast); |
| 472 | tp = cur->bc_tp; |
| 473 | if (bp) { |
| 474 | xfs_bmbt_block_t *block; |
| 475 | int first; |
| 476 | xfs_bmbt_key_t *kp; |
| 477 | int last; |
| 478 | |
| 479 | block = XFS_BUF_TO_BMBT_BLOCK(bp); |
| 480 | kp = XFS_BMAP_KEY_DADDR(block, 1, cur); |
| 481 | first = (int)((xfs_caddr_t)&kp[kfirst - 1] - (xfs_caddr_t)block); |
| 482 | last = (int)(((xfs_caddr_t)&kp[klast] - 1) - (xfs_caddr_t)block); |
| 483 | xfs_trans_log_buf(tp, bp, first, last); |
| 484 | } else { |
| 485 | xfs_inode_t *ip; |
| 486 | |
| 487 | ip = cur->bc_private.b.ip; |
| 488 | xfs_trans_log_inode(tp, ip, |
| 489 | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork)); |
| 490 | } |
| 491 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 492 | } |
| 493 | |
| 494 | /* |
| 495 | * Log pointer values from the btree block. |
| 496 | */ |
| 497 | STATIC void |
| 498 | xfs_bmbt_log_ptrs( |
| 499 | xfs_btree_cur_t *cur, |
| 500 | xfs_buf_t *bp, |
| 501 | int pfirst, |
| 502 | int plast) |
| 503 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | xfs_trans_t *tp; |
| 505 | |
| 506 | XFS_BMBT_TRACE_CURSOR(cur, ENTRY); |
| 507 | XFS_BMBT_TRACE_ARGBII(cur, bp, pfirst, plast); |
| 508 | tp = cur->bc_tp; |
| 509 | if (bp) { |
| 510 | xfs_bmbt_block_t *block; |
| 511 | int first; |
| 512 | int last; |
| 513 | xfs_bmbt_ptr_t *pp; |
| 514 | |
| 515 | block = XFS_BUF_TO_BMBT_BLOCK(bp); |
| 516 | pp = XFS_BMAP_PTR_DADDR(block, 1, cur); |
| 517 | first = (int)((xfs_caddr_t)&pp[pfirst - 1] - (xfs_caddr_t)block); |
| 518 | last = (int)(((xfs_caddr_t)&pp[plast] - 1) - (xfs_caddr_t)block); |
| 519 | xfs_trans_log_buf(tp, bp, first, last); |
| 520 | } else { |
| 521 | xfs_inode_t *ip; |
| 522 | |
| 523 | ip = cur->bc_private.b.ip; |
| 524 | xfs_trans_log_inode(tp, ip, |
| 525 | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork)); |
| 526 | } |
| 527 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 528 | } |
| 529 | |
| 530 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | * Determine the extent state. |
| 532 | */ |
| 533 | /* ARGSUSED */ |
| 534 | STATIC xfs_exntst_t |
| 535 | xfs_extent_state( |
| 536 | xfs_filblks_t blks, |
| 537 | int extent_flag) |
| 538 | { |
| 539 | if (extent_flag) { |
| 540 | ASSERT(blks != 0); /* saved for DMIG */ |
| 541 | return XFS_EXT_UNWRITTEN; |
| 542 | } |
| 543 | return XFS_EXT_NORM; |
| 544 | } |
| 545 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | /* |
| 547 | * Convert on-disk form of btree root to in-memory form. |
| 548 | */ |
| 549 | void |
| 550 | xfs_bmdr_to_bmbt( |
| 551 | xfs_bmdr_block_t *dblock, |
| 552 | int dblocklen, |
| 553 | xfs_bmbt_block_t *rblock, |
| 554 | int rblocklen) |
| 555 | { |
| 556 | int dmxr; |
| 557 | xfs_bmbt_key_t *fkp; |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 558 | __be64 *fpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | xfs_bmbt_key_t *tkp; |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 560 | __be64 *tpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 562 | rblock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC); |
| 563 | rblock->bb_level = dblock->bb_level; |
| 564 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); |
| 565 | rblock->bb_numrecs = dblock->bb_numrecs; |
| 566 | rblock->bb_leftsib = cpu_to_be64(NULLDFSBNO); |
| 567 | rblock->bb_rightsib = cpu_to_be64(NULLDFSBNO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0); |
Eric Sandeen | 2c36dde | 2007-02-10 18:37:33 +1100 | [diff] [blame] | 569 | fkp = XFS_BTREE_KEY_ADDR(xfs_bmdr, dblock, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | tkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen); |
Eric Sandeen | 2c36dde | 2007-02-10 18:37:33 +1100 | [diff] [blame] | 571 | fpp = XFS_BTREE_PTR_ADDR(xfs_bmdr, dblock, 1, dmxr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | tpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 573 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 575 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | * Delete the record pointed to by cur. |
| 580 | */ |
| 581 | int /* error */ |
| 582 | xfs_bmbt_delete( |
| 583 | xfs_btree_cur_t *cur, |
| 584 | int *stat) /* success/failure */ |
| 585 | { |
| 586 | int error; /* error return value */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | int i; |
| 588 | int level; |
| 589 | |
| 590 | XFS_BMBT_TRACE_CURSOR(cur, ENTRY); |
| 591 | for (level = 0, i = 2; i == 2; level++) { |
| 592 | if ((error = xfs_bmbt_delrec(cur, level, &i))) { |
| 593 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 594 | return error; |
| 595 | } |
| 596 | } |
| 597 | if (i == 0) { |
| 598 | for (level = 1; level < cur->bc_nlevels; level++) { |
| 599 | if (cur->bc_ptrs[level] == 0) { |
Christoph Hellwig | 8df4da4 | 2008-10-30 16:55:58 +1100 | [diff] [blame] | 600 | if ((error = xfs_btree_decrement(cur, level, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | &i))) { |
| 602 | XFS_BMBT_TRACE_CURSOR(cur, ERROR); |
| 603 | return error; |
| 604 | } |
| 605 | break; |
| 606 | } |
| 607 | } |
| 608 | } |
| 609 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 610 | *stat = i; |
| 611 | return 0; |
| 612 | } |
| 613 | |
| 614 | /* |
| 615 | * Convert a compressed bmap extent record to an uncompressed form. |
| 616 | * This code must be in sync with the routines xfs_bmbt_get_startoff, |
| 617 | * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state. |
| 618 | */ |
| 619 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 620 | STATIC_INLINE void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | __xfs_bmbt_get_all( |
| 622 | __uint64_t l0, |
| 623 | __uint64_t l1, |
| 624 | xfs_bmbt_irec_t *s) |
| 625 | { |
| 626 | int ext_flag; |
| 627 | xfs_exntst_t st; |
| 628 | |
| 629 | ext_flag = (int)(l0 >> (64 - BMBT_EXNTFLAG_BITLEN)); |
| 630 | s->br_startoff = ((xfs_fileoff_t)l0 & |
| 631 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
| 632 | #if XFS_BIG_BLKNOS |
| 633 | s->br_startblock = (((xfs_fsblock_t)l0 & XFS_MASK64LO(9)) << 43) | |
| 634 | (((xfs_fsblock_t)l1) >> 21); |
| 635 | #else |
| 636 | #ifdef DEBUG |
| 637 | { |
| 638 | xfs_dfsbno_t b; |
| 639 | |
| 640 | b = (((xfs_dfsbno_t)l0 & XFS_MASK64LO(9)) << 43) | |
| 641 | (((xfs_dfsbno_t)l1) >> 21); |
| 642 | ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b)); |
| 643 | s->br_startblock = (xfs_fsblock_t)b; |
| 644 | } |
| 645 | #else /* !DEBUG */ |
| 646 | s->br_startblock = (xfs_fsblock_t)(((xfs_dfsbno_t)l1) >> 21); |
| 647 | #endif /* DEBUG */ |
| 648 | #endif /* XFS_BIG_BLKNOS */ |
| 649 | s->br_blockcount = (xfs_filblks_t)(l1 & XFS_MASK64LO(21)); |
| 650 | /* This is xfs_extent_state() in-line */ |
| 651 | if (ext_flag) { |
| 652 | ASSERT(s->br_blockcount != 0); /* saved for DMIG */ |
| 653 | st = XFS_EXT_UNWRITTEN; |
| 654 | } else |
| 655 | st = XFS_EXT_NORM; |
| 656 | s->br_state = st; |
| 657 | } |
| 658 | |
| 659 | void |
| 660 | xfs_bmbt_get_all( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 661 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | xfs_bmbt_irec_t *s) |
| 663 | { |
| 664 | __xfs_bmbt_get_all(r->l0, r->l1, s); |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * Get the block pointer for the given level of the cursor. |
| 669 | * Fill in the buffer pointer, if applicable. |
| 670 | */ |
| 671 | xfs_bmbt_block_t * |
| 672 | xfs_bmbt_get_block( |
| 673 | xfs_btree_cur_t *cur, |
| 674 | int level, |
| 675 | xfs_buf_t **bpp) |
| 676 | { |
| 677 | xfs_ifork_t *ifp; |
| 678 | xfs_bmbt_block_t *rval; |
| 679 | |
| 680 | if (level < cur->bc_nlevels - 1) { |
| 681 | *bpp = cur->bc_bufs[level]; |
| 682 | rval = XFS_BUF_TO_BMBT_BLOCK(*bpp); |
| 683 | } else { |
| 684 | *bpp = NULL; |
| 685 | ifp = XFS_IFORK_PTR(cur->bc_private.b.ip, |
| 686 | cur->bc_private.b.whichfork); |
| 687 | rval = ifp->if_broot; |
| 688 | } |
| 689 | return rval; |
| 690 | } |
| 691 | |
| 692 | /* |
| 693 | * Extract the blockcount field from an in memory bmap extent record. |
| 694 | */ |
| 695 | xfs_filblks_t |
| 696 | xfs_bmbt_get_blockcount( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 697 | xfs_bmbt_rec_host_t *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | { |
| 699 | return (xfs_filblks_t)(r->l1 & XFS_MASK64LO(21)); |
| 700 | } |
| 701 | |
| 702 | /* |
| 703 | * Extract the startblock field from an in memory bmap extent record. |
| 704 | */ |
| 705 | xfs_fsblock_t |
| 706 | xfs_bmbt_get_startblock( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 707 | xfs_bmbt_rec_host_t *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | { |
| 709 | #if XFS_BIG_BLKNOS |
| 710 | return (((xfs_fsblock_t)r->l0 & XFS_MASK64LO(9)) << 43) | |
| 711 | (((xfs_fsblock_t)r->l1) >> 21); |
| 712 | #else |
| 713 | #ifdef DEBUG |
| 714 | xfs_dfsbno_t b; |
| 715 | |
| 716 | b = (((xfs_dfsbno_t)r->l0 & XFS_MASK64LO(9)) << 43) | |
| 717 | (((xfs_dfsbno_t)r->l1) >> 21); |
| 718 | ASSERT((b >> 32) == 0 || ISNULLDSTARTBLOCK(b)); |
| 719 | return (xfs_fsblock_t)b; |
| 720 | #else /* !DEBUG */ |
| 721 | return (xfs_fsblock_t)(((xfs_dfsbno_t)r->l1) >> 21); |
| 722 | #endif /* DEBUG */ |
| 723 | #endif /* XFS_BIG_BLKNOS */ |
| 724 | } |
| 725 | |
| 726 | /* |
| 727 | * Extract the startoff field from an in memory bmap extent record. |
| 728 | */ |
| 729 | xfs_fileoff_t |
| 730 | xfs_bmbt_get_startoff( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 731 | xfs_bmbt_rec_host_t *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | { |
| 733 | return ((xfs_fileoff_t)r->l0 & |
| 734 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
| 735 | } |
| 736 | |
| 737 | xfs_exntst_t |
| 738 | xfs_bmbt_get_state( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 739 | xfs_bmbt_rec_host_t *r) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | { |
| 741 | int ext_flag; |
| 742 | |
| 743 | ext_flag = (int)((r->l0) >> (64 - BMBT_EXNTFLAG_BITLEN)); |
| 744 | return xfs_extent_state(xfs_bmbt_get_blockcount(r), |
| 745 | ext_flag); |
| 746 | } |
| 747 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | /* Endian flipping versions of the bmbt extraction functions */ |
| 749 | void |
| 750 | xfs_bmbt_disk_get_all( |
| 751 | xfs_bmbt_rec_t *r, |
| 752 | xfs_bmbt_irec_t *s) |
| 753 | { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 754 | __xfs_bmbt_get_all(be64_to_cpu(r->l0), be64_to_cpu(r->l1), s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | } |
| 756 | |
| 757 | /* |
| 758 | * Extract the blockcount field from an on disk bmap extent record. |
| 759 | */ |
| 760 | xfs_filblks_t |
| 761 | xfs_bmbt_disk_get_blockcount( |
| 762 | xfs_bmbt_rec_t *r) |
| 763 | { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 764 | return (xfs_filblks_t)(be64_to_cpu(r->l1) & XFS_MASK64LO(21)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | * Extract the startoff field from a disk format bmap extent record. |
| 769 | */ |
| 770 | xfs_fileoff_t |
| 771 | xfs_bmbt_disk_get_startoff( |
| 772 | xfs_bmbt_rec_t *r) |
| 773 | { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 774 | return ((xfs_fileoff_t)be64_to_cpu(r->l0) & |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN)) >> 9; |
| 776 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | |
| 778 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | * Log fields from the btree block header. |
| 780 | */ |
| 781 | void |
| 782 | xfs_bmbt_log_block( |
| 783 | xfs_btree_cur_t *cur, |
| 784 | xfs_buf_t *bp, |
| 785 | int fields) |
| 786 | { |
| 787 | int first; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | int last; |
| 789 | xfs_trans_t *tp; |
| 790 | static const short offsets[] = { |
| 791 | offsetof(xfs_bmbt_block_t, bb_magic), |
| 792 | offsetof(xfs_bmbt_block_t, bb_level), |
| 793 | offsetof(xfs_bmbt_block_t, bb_numrecs), |
| 794 | offsetof(xfs_bmbt_block_t, bb_leftsib), |
| 795 | offsetof(xfs_bmbt_block_t, bb_rightsib), |
| 796 | sizeof(xfs_bmbt_block_t) |
| 797 | }; |
| 798 | |
| 799 | XFS_BMBT_TRACE_CURSOR(cur, ENTRY); |
| 800 | XFS_BMBT_TRACE_ARGBI(cur, bp, fields); |
| 801 | tp = cur->bc_tp; |
| 802 | if (bp) { |
| 803 | xfs_btree_offsets(fields, offsets, XFS_BB_NUM_BITS, &first, |
| 804 | &last); |
| 805 | xfs_trans_log_buf(tp, bp, first, last); |
| 806 | } else |
| 807 | xfs_trans_log_inode(tp, cur->bc_private.b.ip, |
| 808 | XFS_ILOG_FBROOT(cur->bc_private.b.whichfork)); |
| 809 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 810 | } |
| 811 | |
| 812 | /* |
| 813 | * Log record values from the btree block. |
| 814 | */ |
| 815 | void |
| 816 | xfs_bmbt_log_recs( |
| 817 | xfs_btree_cur_t *cur, |
| 818 | xfs_buf_t *bp, |
| 819 | int rfirst, |
| 820 | int rlast) |
| 821 | { |
| 822 | xfs_bmbt_block_t *block; |
| 823 | int first; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | int last; |
| 825 | xfs_bmbt_rec_t *rp; |
| 826 | xfs_trans_t *tp; |
| 827 | |
| 828 | XFS_BMBT_TRACE_CURSOR(cur, ENTRY); |
| 829 | XFS_BMBT_TRACE_ARGBII(cur, bp, rfirst, rlast); |
| 830 | ASSERT(bp); |
| 831 | tp = cur->bc_tp; |
| 832 | block = XFS_BUF_TO_BMBT_BLOCK(bp); |
| 833 | rp = XFS_BMAP_REC_DADDR(block, 1, cur); |
| 834 | first = (int)((xfs_caddr_t)&rp[rfirst - 1] - (xfs_caddr_t)block); |
| 835 | last = (int)(((xfs_caddr_t)&rp[rlast] - 1) - (xfs_caddr_t)block); |
| 836 | xfs_trans_log_buf(tp, bp, first, last); |
| 837 | XFS_BMBT_TRACE_CURSOR(cur, EXIT); |
| 838 | } |
| 839 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | /* |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 841 | * Set all the fields in a bmap extent record from the arguments. |
| 842 | */ |
| 843 | void |
| 844 | xfs_bmbt_set_allf( |
| 845 | xfs_bmbt_rec_host_t *r, |
| 846 | xfs_fileoff_t startoff, |
| 847 | xfs_fsblock_t startblock, |
| 848 | xfs_filblks_t blockcount, |
| 849 | xfs_exntst_t state) |
| 850 | { |
| 851 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
| 852 | |
| 853 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); |
| 854 | ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0); |
| 855 | ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); |
| 856 | |
| 857 | #if XFS_BIG_BLKNOS |
| 858 | ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
| 859 | |
| 860 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 861 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
| 862 | ((xfs_bmbt_rec_base_t)startblock >> 43); |
| 863 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 864 | ((xfs_bmbt_rec_base_t)blockcount & |
| 865 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 866 | #else /* !XFS_BIG_BLKNOS */ |
Michal Piotrowski | ddc6d3b | 2007-08-23 16:20:10 +1000 | [diff] [blame] | 867 | if (ISNULLSTARTBLOCK(startblock)) { |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 868 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 869 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
| 870 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
| 871 | r->l1 = XFS_MASK64HI(11) | |
| 872 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 873 | ((xfs_bmbt_rec_base_t)blockcount & |
| 874 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 875 | } else { |
| 876 | r->l0 = ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 877 | ((xfs_bmbt_rec_base_t)startoff << 9); |
| 878 | r->l1 = ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 879 | ((xfs_bmbt_rec_base_t)blockcount & |
| 880 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 881 | } |
| 882 | #endif /* XFS_BIG_BLKNOS */ |
| 883 | } |
| 884 | |
| 885 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | * Set all the fields in a bmap extent record from the uncompressed form. |
| 887 | */ |
| 888 | void |
| 889 | xfs_bmbt_set_all( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 890 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | xfs_bmbt_irec_t *s) |
| 892 | { |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 893 | xfs_bmbt_set_allf(r, s->br_startoff, s->br_startblock, |
| 894 | s->br_blockcount, s->br_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | } |
| 896 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | /* |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 899 | * Set all the fields in a disk format bmap extent record from the arguments. |
| 900 | */ |
| 901 | void |
| 902 | xfs_bmbt_disk_set_allf( |
| 903 | xfs_bmbt_rec_t *r, |
| 904 | xfs_fileoff_t startoff, |
| 905 | xfs_fsblock_t startblock, |
| 906 | xfs_filblks_t blockcount, |
| 907 | xfs_exntst_t state) |
| 908 | { |
| 909 | int extent_flag = (state == XFS_EXT_NORM) ? 0 : 1; |
| 910 | |
| 911 | ASSERT(state == XFS_EXT_NORM || state == XFS_EXT_UNWRITTEN); |
| 912 | ASSERT((startoff & XFS_MASK64HI(64-BMBT_STARTOFF_BITLEN)) == 0); |
| 913 | ASSERT((blockcount & XFS_MASK64HI(64-BMBT_BLOCKCOUNT_BITLEN)) == 0); |
| 914 | |
| 915 | #if XFS_BIG_BLKNOS |
| 916 | ASSERT((startblock & XFS_MASK64HI(64-BMBT_STARTBLOCK_BITLEN)) == 0); |
| 917 | |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 918 | r->l0 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 919 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 920 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
| 921 | ((xfs_bmbt_rec_base_t)startblock >> 43)); |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 922 | r->l1 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 923 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 924 | ((xfs_bmbt_rec_base_t)blockcount & |
| 925 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); |
| 926 | #else /* !XFS_BIG_BLKNOS */ |
Michal Piotrowski | ddc6d3b | 2007-08-23 16:20:10 +1000 | [diff] [blame] | 927 | if (ISNULLSTARTBLOCK(startblock)) { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 928 | r->l0 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 929 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 930 | ((xfs_bmbt_rec_base_t)startoff << 9) | |
| 931 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(9)); |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 932 | r->l1 = cpu_to_be64(XFS_MASK64HI(11) | |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 933 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 934 | ((xfs_bmbt_rec_base_t)blockcount & |
| 935 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); |
| 936 | } else { |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 937 | r->l0 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 938 | ((xfs_bmbt_rec_base_t)extent_flag << 63) | |
| 939 | ((xfs_bmbt_rec_base_t)startoff << 9)); |
Christoph Hellwig | cd8b0a9 | 2007-08-16 16:24:15 +1000 | [diff] [blame] | 940 | r->l1 = cpu_to_be64( |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 941 | ((xfs_bmbt_rec_base_t)startblock << 21) | |
| 942 | ((xfs_bmbt_rec_base_t)blockcount & |
| 943 | (xfs_bmbt_rec_base_t)XFS_MASK64LO(21))); |
| 944 | } |
| 945 | #endif /* XFS_BIG_BLKNOS */ |
| 946 | } |
| 947 | |
| 948 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | * Set all the fields in a bmap extent record from the uncompressed form. |
| 950 | */ |
| 951 | void |
| 952 | xfs_bmbt_disk_set_all( |
| 953 | xfs_bmbt_rec_t *r, |
| 954 | xfs_bmbt_irec_t *s) |
| 955 | { |
Christoph Hellwig | 8cba434 | 2007-08-16 16:23:53 +1000 | [diff] [blame] | 956 | xfs_bmbt_disk_set_allf(r, s->br_startoff, s->br_startblock, |
| 957 | s->br_blockcount, s->br_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | |
| 960 | /* |
| 961 | * Set the blockcount field in a bmap extent record. |
| 962 | */ |
| 963 | void |
| 964 | xfs_bmbt_set_blockcount( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 965 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | xfs_filblks_t v) |
| 967 | { |
| 968 | ASSERT((v & XFS_MASK64HI(43)) == 0); |
| 969 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(43)) | |
| 970 | (xfs_bmbt_rec_base_t)(v & XFS_MASK64LO(21)); |
| 971 | } |
| 972 | |
| 973 | /* |
| 974 | * Set the startblock field in a bmap extent record. |
| 975 | */ |
| 976 | void |
| 977 | xfs_bmbt_set_startblock( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 978 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | xfs_fsblock_t v) |
| 980 | { |
| 981 | #if XFS_BIG_BLKNOS |
| 982 | ASSERT((v & XFS_MASK64HI(12)) == 0); |
| 983 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64HI(55)) | |
| 984 | (xfs_bmbt_rec_base_t)(v >> 43); |
| 985 | r->l1 = (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)) | |
| 986 | (xfs_bmbt_rec_base_t)(v << 21); |
| 987 | #else /* !XFS_BIG_BLKNOS */ |
| 988 | if (ISNULLSTARTBLOCK(v)) { |
| 989 | r->l0 |= (xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
| 990 | r->l1 = (xfs_bmbt_rec_base_t)XFS_MASK64HI(11) | |
| 991 | ((xfs_bmbt_rec_base_t)v << 21) | |
| 992 | (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 993 | } else { |
| 994 | r->l0 &= ~(xfs_bmbt_rec_base_t)XFS_MASK64LO(9); |
| 995 | r->l1 = ((xfs_bmbt_rec_base_t)v << 21) | |
| 996 | (r->l1 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(21)); |
| 997 | } |
| 998 | #endif /* XFS_BIG_BLKNOS */ |
| 999 | } |
| 1000 | |
| 1001 | /* |
| 1002 | * Set the startoff field in a bmap extent record. |
| 1003 | */ |
| 1004 | void |
| 1005 | xfs_bmbt_set_startoff( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 1006 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | xfs_fileoff_t v) |
| 1008 | { |
| 1009 | ASSERT((v & XFS_MASK64HI(9)) == 0); |
| 1010 | r->l0 = (r->l0 & (xfs_bmbt_rec_base_t) XFS_MASK64HI(1)) | |
| 1011 | ((xfs_bmbt_rec_base_t)v << 9) | |
| 1012 | (r->l0 & (xfs_bmbt_rec_base_t)XFS_MASK64LO(9)); |
| 1013 | } |
| 1014 | |
| 1015 | /* |
| 1016 | * Set the extent state field in a bmap extent record. |
| 1017 | */ |
| 1018 | void |
| 1019 | xfs_bmbt_set_state( |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 1020 | xfs_bmbt_rec_host_t *r, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | xfs_exntst_t v) |
| 1022 | { |
| 1023 | ASSERT(v == XFS_EXT_NORM || v == XFS_EXT_UNWRITTEN); |
| 1024 | if (v == XFS_EXT_NORM) |
| 1025 | r->l0 &= XFS_MASK64LO(64 - BMBT_EXNTFLAG_BITLEN); |
| 1026 | else |
| 1027 | r->l0 |= XFS_MASK64HI(BMBT_EXNTFLAG_BITLEN); |
| 1028 | } |
| 1029 | |
| 1030 | /* |
| 1031 | * Convert in-memory form of btree root to on-disk form. |
| 1032 | */ |
| 1033 | void |
| 1034 | xfs_bmbt_to_bmdr( |
| 1035 | xfs_bmbt_block_t *rblock, |
| 1036 | int rblocklen, |
| 1037 | xfs_bmdr_block_t *dblock, |
| 1038 | int dblocklen) |
| 1039 | { |
| 1040 | int dmxr; |
| 1041 | xfs_bmbt_key_t *fkp; |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 1042 | __be64 *fpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | xfs_bmbt_key_t *tkp; |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 1044 | __be64 *tpp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1046 | ASSERT(be32_to_cpu(rblock->bb_magic) == XFS_BMAP_MAGIC); |
| 1047 | ASSERT(be64_to_cpu(rblock->bb_leftsib) == NULLDFSBNO); |
| 1048 | ASSERT(be64_to_cpu(rblock->bb_rightsib) == NULLDFSBNO); |
| 1049 | ASSERT(be16_to_cpu(rblock->bb_level) > 0); |
| 1050 | dblock->bb_level = rblock->bb_level; |
| 1051 | dblock->bb_numrecs = rblock->bb_numrecs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | dmxr = (int)XFS_BTREE_BLOCK_MAXRECS(dblocklen, xfs_bmdr, 0); |
| 1053 | fkp = XFS_BMAP_BROOT_KEY_ADDR(rblock, 1, rblocklen); |
Eric Sandeen | 2c36dde | 2007-02-10 18:37:33 +1100 | [diff] [blame] | 1054 | tkp = XFS_BTREE_KEY_ADDR(xfs_bmdr, dblock, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | fpp = XFS_BMAP_BROOT_PTR_ADDR(rblock, 1, rblocklen); |
Eric Sandeen | 2c36dde | 2007-02-10 18:37:33 +1100 | [diff] [blame] | 1056 | tpp = XFS_BTREE_PTR_ADDR(xfs_bmdr, dblock, 1, dmxr); |
Christoph Hellwig | 16259e7 | 2005-11-02 15:11:25 +1100 | [diff] [blame] | 1057 | dmxr = be16_to_cpu(dblock->bb_numrecs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | memcpy(tkp, fkp, sizeof(*fkp) * dmxr); |
Christoph Hellwig | 576039c | 2006-09-28 10:58:06 +1000 | [diff] [blame] | 1059 | memcpy(tpp, fpp, sizeof(*fpp) * dmxr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | } |
| 1061 | |
| 1062 | /* |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 1063 | * Check extent records, which have just been read, for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | * any bit in the extent flag field. ASSERT on debug |
| 1065 | * kernels, as this condition should not occur. |
| 1066 | * Return an error condition (1) if any flags found, |
| 1067 | * otherwise return 0. |
| 1068 | */ |
| 1069 | |
| 1070 | int |
| 1071 | xfs_check_nostate_extents( |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 1072 | xfs_ifork_t *ifp, |
| 1073 | xfs_extnum_t idx, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | xfs_extnum_t num) |
| 1075 | { |
Mandy Kirkconnell | 4eea22f | 2006-03-14 13:29:52 +1100 | [diff] [blame] | 1076 | for (; num > 0; num--, idx++) { |
Christoph Hellwig | a6f64d4 | 2007-08-16 16:23:40 +1000 | [diff] [blame] | 1077 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | if ((ep->l0 >> |
| 1079 | (64 - BMBT_EXNTFLAG_BITLEN)) != 0) { |
| 1080 | ASSERT(0); |
| 1081 | return 1; |
| 1082 | } |
| 1083 | } |
| 1084 | return 0; |
| 1085 | } |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 1086 | |
| 1087 | |
| 1088 | STATIC struct xfs_btree_cur * |
| 1089 | xfs_bmbt_dup_cursor( |
| 1090 | struct xfs_btree_cur *cur) |
| 1091 | { |
| 1092 | struct xfs_btree_cur *new; |
| 1093 | |
| 1094 | new = xfs_bmbt_init_cursor(cur->bc_mp, cur->bc_tp, |
| 1095 | cur->bc_private.b.ip, cur->bc_private.b.whichfork); |
| 1096 | |
| 1097 | /* |
| 1098 | * Copy the firstblock, flist, and flags values, |
| 1099 | * since init cursor doesn't get them. |
| 1100 | */ |
| 1101 | new->bc_private.b.firstblock = cur->bc_private.b.firstblock; |
| 1102 | new->bc_private.b.flist = cur->bc_private.b.flist; |
| 1103 | new->bc_private.b.flags = cur->bc_private.b.flags; |
| 1104 | |
| 1105 | return new; |
| 1106 | } |
| 1107 | |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 1108 | STATIC void |
| 1109 | xfs_bmbt_update_cursor( |
| 1110 | struct xfs_btree_cur *src, |
| 1111 | struct xfs_btree_cur *dst) |
| 1112 | { |
| 1113 | ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || |
| 1114 | (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); |
| 1115 | ASSERT(dst->bc_private.b.flist == src->bc_private.b.flist); |
| 1116 | |
| 1117 | dst->bc_private.b.allocated += src->bc_private.b.allocated; |
| 1118 | dst->bc_private.b.firstblock = src->bc_private.b.firstblock; |
| 1119 | |
| 1120 | src->bc_private.b.allocated = 0; |
| 1121 | } |
| 1122 | |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 1123 | STATIC int |
Christoph Hellwig | f5eb8e7 | 2008-10-30 16:57:03 +1100 | [diff] [blame] | 1124 | xfs_bmbt_alloc_block( |
| 1125 | struct xfs_btree_cur *cur, |
| 1126 | union xfs_btree_ptr *start, |
| 1127 | union xfs_btree_ptr *new, |
| 1128 | int length, |
| 1129 | int *stat) |
| 1130 | { |
| 1131 | xfs_alloc_arg_t args; /* block allocation args */ |
| 1132 | int error; /* error return value */ |
| 1133 | |
| 1134 | memset(&args, 0, sizeof(args)); |
| 1135 | args.tp = cur->bc_tp; |
| 1136 | args.mp = cur->bc_mp; |
| 1137 | args.fsbno = cur->bc_private.b.firstblock; |
| 1138 | args.firstblock = args.fsbno; |
| 1139 | |
| 1140 | if (args.fsbno == NULLFSBLOCK) { |
| 1141 | args.fsbno = be64_to_cpu(start->l); |
| 1142 | args.type = XFS_ALLOCTYPE_START_BNO; |
| 1143 | /* |
| 1144 | * Make sure there is sufficient room left in the AG to |
| 1145 | * complete a full tree split for an extent insert. If |
| 1146 | * we are converting the middle part of an extent then |
| 1147 | * we may need space for two tree splits. |
| 1148 | * |
| 1149 | * We are relying on the caller to make the correct block |
| 1150 | * reservation for this operation to succeed. If the |
| 1151 | * reservation amount is insufficient then we may fail a |
| 1152 | * block allocation here and corrupt the filesystem. |
| 1153 | */ |
| 1154 | args.minleft = xfs_trans_get_block_res(args.tp); |
| 1155 | } else if (cur->bc_private.b.flist->xbf_low) { |
| 1156 | args.type = XFS_ALLOCTYPE_START_BNO; |
| 1157 | } else { |
| 1158 | args.type = XFS_ALLOCTYPE_NEAR_BNO; |
| 1159 | } |
| 1160 | |
| 1161 | args.minlen = args.maxlen = args.prod = 1; |
| 1162 | args.wasdel = cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL; |
| 1163 | if (!args.wasdel && xfs_trans_get_block_res(args.tp) == 0) { |
| 1164 | error = XFS_ERROR(ENOSPC); |
| 1165 | goto error0; |
| 1166 | } |
| 1167 | error = xfs_alloc_vextent(&args); |
| 1168 | if (error) |
| 1169 | goto error0; |
| 1170 | |
| 1171 | if (args.fsbno == NULLFSBLOCK && args.minleft) { |
| 1172 | /* |
| 1173 | * Could not find an AG with enough free space to satisfy |
| 1174 | * a full btree split. Try again without minleft and if |
| 1175 | * successful activate the lowspace algorithm. |
| 1176 | */ |
| 1177 | args.fsbno = 0; |
| 1178 | args.type = XFS_ALLOCTYPE_FIRST_AG; |
| 1179 | args.minleft = 0; |
| 1180 | error = xfs_alloc_vextent(&args); |
| 1181 | if (error) |
| 1182 | goto error0; |
| 1183 | cur->bc_private.b.flist->xbf_low = 1; |
| 1184 | } |
| 1185 | if (args.fsbno == NULLFSBLOCK) { |
| 1186 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); |
| 1187 | *stat = 0; |
| 1188 | return 0; |
| 1189 | } |
| 1190 | ASSERT(args.len == 1); |
| 1191 | cur->bc_private.b.firstblock = args.fsbno; |
| 1192 | cur->bc_private.b.allocated++; |
| 1193 | cur->bc_private.b.ip->i_d.di_nblocks++; |
| 1194 | xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE); |
| 1195 | XFS_TRANS_MOD_DQUOT_BYINO(args.mp, args.tp, cur->bc_private.b.ip, |
| 1196 | XFS_TRANS_DQ_BCOUNT, 1L); |
| 1197 | |
| 1198 | new->l = cpu_to_be64(args.fsbno); |
| 1199 | |
| 1200 | XFS_BTREE_TRACE_CURSOR(cur, XBT_EXIT); |
| 1201 | *stat = 1; |
| 1202 | return 0; |
| 1203 | |
| 1204 | error0: |
| 1205 | XFS_BTREE_TRACE_CURSOR(cur, XBT_ERROR); |
| 1206 | return error; |
| 1207 | } |
| 1208 | |
| 1209 | STATIC int |
Christoph Hellwig | d4b3a4b | 2008-10-30 16:57:51 +1100 | [diff] [blame^] | 1210 | xfs_bmbt_free_block( |
| 1211 | struct xfs_btree_cur *cur, |
| 1212 | struct xfs_buf *bp) |
| 1213 | { |
| 1214 | struct xfs_mount *mp = cur->bc_mp; |
| 1215 | struct xfs_inode *ip = cur->bc_private.b.ip; |
| 1216 | struct xfs_trans *tp = cur->bc_tp; |
| 1217 | xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, XFS_BUF_ADDR(bp)); |
| 1218 | |
| 1219 | xfs_bmap_add_free(fsbno, 1, cur->bc_private.b.flist, mp); |
| 1220 | ip->i_d.di_nblocks--; |
| 1221 | |
| 1222 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 1223 | XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); |
| 1224 | xfs_trans_binval(tp, bp); |
| 1225 | return 0; |
| 1226 | } |
| 1227 | |
| 1228 | STATIC int |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 1229 | xfs_bmbt_get_maxrecs( |
| 1230 | struct xfs_btree_cur *cur, |
| 1231 | int level) |
| 1232 | { |
| 1233 | return XFS_BMAP_BLOCK_IMAXRECS(level, cur); |
| 1234 | } |
| 1235 | |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 1236 | /* |
| 1237 | * Get the maximum records we could store in the on-disk format. |
| 1238 | * |
| 1239 | * For non-root nodes this is equivalent to xfs_bmbt_get_maxrecs, but |
| 1240 | * for the root node this checks the available space in the dinode fork |
| 1241 | * so that we can resize the in-memory buffer to match it. After a |
| 1242 | * resize to the maximum size this function returns the same value |
| 1243 | * as xfs_bmbt_get_maxrecs for the root node, too. |
| 1244 | */ |
| 1245 | STATIC int |
| 1246 | xfs_bmbt_get_dmaxrecs( |
| 1247 | struct xfs_btree_cur *cur, |
| 1248 | int level) |
| 1249 | { |
| 1250 | return XFS_BMAP_BLOCK_DMAXRECS(level, cur); |
| 1251 | } |
| 1252 | |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 1253 | STATIC void |
| 1254 | xfs_bmbt_init_key_from_rec( |
| 1255 | union xfs_btree_key *key, |
| 1256 | union xfs_btree_rec *rec) |
| 1257 | { |
| 1258 | key->bmbt.br_startoff = |
| 1259 | cpu_to_be64(xfs_bmbt_disk_get_startoff(&rec->bmbt)); |
| 1260 | } |
| 1261 | |
| 1262 | STATIC void |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 1263 | xfs_bmbt_init_rec_from_key( |
| 1264 | union xfs_btree_key *key, |
| 1265 | union xfs_btree_rec *rec) |
| 1266 | { |
| 1267 | ASSERT(key->bmbt.br_startoff != 0); |
| 1268 | |
| 1269 | xfs_bmbt_disk_set_allf(&rec->bmbt, be64_to_cpu(key->bmbt.br_startoff), |
| 1270 | 0, 0, XFS_EXT_NORM); |
| 1271 | } |
| 1272 | |
| 1273 | STATIC void |
| 1274 | xfs_bmbt_init_rec_from_cur( |
| 1275 | struct xfs_btree_cur *cur, |
| 1276 | union xfs_btree_rec *rec) |
| 1277 | { |
| 1278 | xfs_bmbt_disk_set_all(&rec->bmbt, &cur->bc_rec.b); |
| 1279 | } |
| 1280 | |
| 1281 | STATIC void |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 1282 | xfs_bmbt_init_ptr_from_cur( |
| 1283 | struct xfs_btree_cur *cur, |
| 1284 | union xfs_btree_ptr *ptr) |
| 1285 | { |
| 1286 | ptr->l = 0; |
| 1287 | } |
| 1288 | |
| 1289 | STATIC __int64_t |
| 1290 | xfs_bmbt_key_diff( |
| 1291 | struct xfs_btree_cur *cur, |
| 1292 | union xfs_btree_key *key) |
| 1293 | { |
| 1294 | return (__int64_t)be64_to_cpu(key->bmbt.br_startoff) - |
| 1295 | cur->bc_rec.b.br_startoff; |
| 1296 | } |
| 1297 | |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 1298 | #ifdef XFS_BTREE_TRACE |
| 1299 | ktrace_t *xfs_bmbt_trace_buf; |
| 1300 | |
| 1301 | STATIC void |
| 1302 | xfs_bmbt_trace_enter( |
| 1303 | struct xfs_btree_cur *cur, |
| 1304 | const char *func, |
| 1305 | char *s, |
| 1306 | int type, |
| 1307 | int line, |
| 1308 | __psunsigned_t a0, |
| 1309 | __psunsigned_t a1, |
| 1310 | __psunsigned_t a2, |
| 1311 | __psunsigned_t a3, |
| 1312 | __psunsigned_t a4, |
| 1313 | __psunsigned_t a5, |
| 1314 | __psunsigned_t a6, |
| 1315 | __psunsigned_t a7, |
| 1316 | __psunsigned_t a8, |
| 1317 | __psunsigned_t a9, |
| 1318 | __psunsigned_t a10) |
| 1319 | { |
| 1320 | struct xfs_inode *ip = cur->bc_private.b.ip; |
| 1321 | int whichfork = cur->bc_private.b.whichfork; |
| 1322 | |
| 1323 | ktrace_enter(xfs_bmbt_trace_buf, |
| 1324 | (void *)((__psint_t)type | (whichfork << 8) | (line << 16)), |
| 1325 | (void *)func, (void *)s, (void *)ip, (void *)cur, |
| 1326 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, |
| 1327 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, |
| 1328 | (void *)a8, (void *)a9, (void *)a10); |
| 1329 | ktrace_enter(ip->i_btrace, |
| 1330 | (void *)((__psint_t)type | (whichfork << 8) | (line << 16)), |
| 1331 | (void *)func, (void *)s, (void *)ip, (void *)cur, |
| 1332 | (void *)a0, (void *)a1, (void *)a2, (void *)a3, |
| 1333 | (void *)a4, (void *)a5, (void *)a6, (void *)a7, |
| 1334 | (void *)a8, (void *)a9, (void *)a10); |
| 1335 | } |
| 1336 | |
| 1337 | STATIC void |
| 1338 | xfs_bmbt_trace_cursor( |
| 1339 | struct xfs_btree_cur *cur, |
| 1340 | __uint32_t *s0, |
| 1341 | __uint64_t *l0, |
| 1342 | __uint64_t *l1) |
| 1343 | { |
| 1344 | struct xfs_bmbt_rec_host r; |
| 1345 | |
| 1346 | xfs_bmbt_set_all(&r, &cur->bc_rec.b); |
| 1347 | |
| 1348 | *s0 = (cur->bc_nlevels << 24) | |
| 1349 | (cur->bc_private.b.flags << 16) | |
| 1350 | cur->bc_private.b.allocated; |
| 1351 | *l0 = r.l0; |
| 1352 | *l1 = r.l1; |
| 1353 | } |
| 1354 | |
| 1355 | STATIC void |
| 1356 | xfs_bmbt_trace_key( |
| 1357 | struct xfs_btree_cur *cur, |
| 1358 | union xfs_btree_key *key, |
| 1359 | __uint64_t *l0, |
| 1360 | __uint64_t *l1) |
| 1361 | { |
| 1362 | *l0 = be64_to_cpu(key->bmbt.br_startoff); |
| 1363 | *l1 = 0; |
| 1364 | } |
| 1365 | |
| 1366 | STATIC void |
| 1367 | xfs_bmbt_trace_record( |
| 1368 | struct xfs_btree_cur *cur, |
| 1369 | union xfs_btree_rec *rec, |
| 1370 | __uint64_t *l0, |
| 1371 | __uint64_t *l1, |
| 1372 | __uint64_t *l2) |
| 1373 | { |
| 1374 | struct xfs_bmbt_irec irec; |
| 1375 | |
| 1376 | xfs_bmbt_disk_get_all(&rec->bmbt, &irec); |
| 1377 | *l0 = irec.br_startoff; |
| 1378 | *l1 = irec.br_startblock; |
| 1379 | *l2 = irec.br_blockcount; |
| 1380 | } |
| 1381 | #endif /* XFS_BTREE_TRACE */ |
| 1382 | |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 1383 | static const struct xfs_btree_ops xfs_bmbt_ops = { |
Christoph Hellwig | 65f1eae | 2008-10-30 16:55:34 +1100 | [diff] [blame] | 1384 | .rec_len = sizeof(xfs_bmbt_rec_t), |
| 1385 | .key_len = sizeof(xfs_bmbt_key_t), |
| 1386 | |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 1387 | .dup_cursor = xfs_bmbt_dup_cursor, |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 1388 | .update_cursor = xfs_bmbt_update_cursor, |
Christoph Hellwig | f5eb8e7 | 2008-10-30 16:57:03 +1100 | [diff] [blame] | 1389 | .alloc_block = xfs_bmbt_alloc_block, |
Christoph Hellwig | d4b3a4b | 2008-10-30 16:57:51 +1100 | [diff] [blame^] | 1390 | .free_block = xfs_bmbt_free_block, |
Christoph Hellwig | ce5e42d | 2008-10-30 16:55:23 +1100 | [diff] [blame] | 1391 | .get_maxrecs = xfs_bmbt_get_maxrecs, |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 1392 | .get_dmaxrecs = xfs_bmbt_get_dmaxrecs, |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 1393 | .init_key_from_rec = xfs_bmbt_init_key_from_rec, |
Christoph Hellwig | 4b22a57 | 2008-10-30 16:57:40 +1100 | [diff] [blame] | 1394 | .init_rec_from_key = xfs_bmbt_init_rec_from_key, |
| 1395 | .init_rec_from_cur = xfs_bmbt_init_rec_from_cur, |
Christoph Hellwig | fe033cc | 2008-10-30 16:56:09 +1100 | [diff] [blame] | 1396 | .init_ptr_from_cur = xfs_bmbt_init_ptr_from_cur, |
| 1397 | .key_diff = xfs_bmbt_key_diff, |
Christoph Hellwig | 8c4ed63 | 2008-10-30 16:55:13 +1100 | [diff] [blame] | 1398 | |
| 1399 | #ifdef XFS_BTREE_TRACE |
| 1400 | .trace_enter = xfs_bmbt_trace_enter, |
| 1401 | .trace_cursor = xfs_bmbt_trace_cursor, |
| 1402 | .trace_key = xfs_bmbt_trace_key, |
| 1403 | .trace_record = xfs_bmbt_trace_record, |
| 1404 | #endif |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 1405 | }; |
| 1406 | |
| 1407 | /* |
| 1408 | * Allocate a new bmap btree cursor. |
| 1409 | */ |
| 1410 | struct xfs_btree_cur * /* new bmap btree cursor */ |
| 1411 | xfs_bmbt_init_cursor( |
| 1412 | struct xfs_mount *mp, /* file system mount point */ |
| 1413 | struct xfs_trans *tp, /* transaction pointer */ |
| 1414 | struct xfs_inode *ip, /* inode owning the btree */ |
| 1415 | int whichfork) /* data or attr fork */ |
| 1416 | { |
| 1417 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); |
| 1418 | struct xfs_btree_cur *cur; |
| 1419 | |
| 1420 | cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_SLEEP); |
| 1421 | |
| 1422 | cur->bc_tp = tp; |
| 1423 | cur->bc_mp = mp; |
| 1424 | cur->bc_nlevels = be16_to_cpu(ifp->if_broot->bb_level) + 1; |
| 1425 | cur->bc_btnum = XFS_BTNUM_BMAP; |
| 1426 | cur->bc_blocklog = mp->m_sb.sb_blocklog; |
| 1427 | |
| 1428 | cur->bc_ops = &xfs_bmbt_ops; |
Christoph Hellwig | e99ab90 | 2008-10-30 16:54:33 +1100 | [diff] [blame] | 1429 | cur->bc_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE; |
Christoph Hellwig | 561f7d1 | 2008-10-30 16:53:59 +1100 | [diff] [blame] | 1430 | |
| 1431 | cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork); |
| 1432 | cur->bc_private.b.ip = ip; |
| 1433 | cur->bc_private.b.firstblock = NULLFSBLOCK; |
| 1434 | cur->bc_private.b.flist = NULL; |
| 1435 | cur->bc_private.b.allocated = 0; |
| 1436 | cur->bc_private.b.flags = 0; |
| 1437 | cur->bc_private.b.whichfork = whichfork; |
| 1438 | |
| 1439 | return cur; |
| 1440 | } |