Commit | Line | Data |
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1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
70a9883c | 20 | #include "xfs_shared.h" |
239880ef DC |
21 | #include "xfs_format.h" |
22 | #include "xfs_log_format.h" | |
23 | #include "xfs_trans_resv.h" | |
a844f451 | 24 | #include "xfs_bit.h" |
a844f451 | 25 | #include "xfs_inum.h" |
1da177e4 LT |
26 | #include "xfs_sb.h" |
27 | #include "xfs_ag.h" | |
f5ea1100 | 28 | #include "xfs_mount.h" |
57062787 | 29 | #include "xfs_da_format.h" |
a844f451 | 30 | #include "xfs_da_btree.h" |
2b9ab5ab | 31 | #include "xfs_dir2.h" |
1da177e4 | 32 | #include "xfs_inode.h" |
a844f451 | 33 | #include "xfs_btree.h" |
239880ef | 34 | #include "xfs_trans.h" |
a844f451 | 35 | #include "xfs_inode_item.h" |
1da177e4 LT |
36 | #include "xfs_extfree_item.h" |
37 | #include "xfs_alloc.h" | |
38 | #include "xfs_bmap.h" | |
68988114 | 39 | #include "xfs_bmap_util.h" |
a4fbe6ab | 40 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
41 | #include "xfs_rtalloc.h" |
42 | #include "xfs_error.h" | |
1da177e4 LT |
43 | #include "xfs_quota.h" |
44 | #include "xfs_trans_space.h" | |
45 | #include "xfs_buf_item.h" | |
0b1b213f | 46 | #include "xfs_trace.h" |
19de7351 | 47 | #include "xfs_symlink.h" |
a4fbe6ab DC |
48 | #include "xfs_attr_leaf.h" |
49 | #include "xfs_dinode.h" | |
50 | #include "xfs_filestream.h" | |
1da177e4 LT |
51 | |
52 | ||
1da177e4 LT |
53 | kmem_zone_t *xfs_bmap_free_item_zone; |
54 | ||
55 | /* | |
9e5987a7 | 56 | * Miscellaneous helper functions |
1da177e4 LT |
57 | */ |
58 | ||
1da177e4 | 59 | /* |
9e5987a7 DC |
60 | * Compute and fill in the value of the maximum depth of a bmap btree |
61 | * in this filesystem. Done once, during mount. | |
1da177e4 | 62 | */ |
9e5987a7 DC |
63 | void |
64 | xfs_bmap_compute_maxlevels( | |
65 | xfs_mount_t *mp, /* file system mount structure */ | |
66 | int whichfork) /* data or attr fork */ | |
67 | { | |
68 | int level; /* btree level */ | |
69 | uint maxblocks; /* max blocks at this level */ | |
70 | uint maxleafents; /* max leaf entries possible */ | |
71 | int maxrootrecs; /* max records in root block */ | |
72 | int minleafrecs; /* min records in leaf block */ | |
73 | int minnoderecs; /* min records in node block */ | |
74 | int sz; /* root block size */ | |
1da177e4 | 75 | |
9e5987a7 DC |
76 | /* |
77 | * The maximum number of extents in a file, hence the maximum | |
78 | * number of leaf entries, is controlled by the type of di_nextents | |
79 | * (a signed 32-bit number, xfs_extnum_t), or by di_anextents | |
80 | * (a signed 16-bit number, xfs_aextnum_t). | |
81 | * | |
82 | * Note that we can no longer assume that if we are in ATTR1 that | |
83 | * the fork offset of all the inodes will be | |
84 | * (xfs_default_attroffset(ip) >> 3) because we could have mounted | |
85 | * with ATTR2 and then mounted back with ATTR1, keeping the | |
86 | * di_forkoff's fixed but probably at various positions. Therefore, | |
87 | * for both ATTR1 and ATTR2 we have to assume the worst case scenario | |
88 | * of a minimum size available. | |
89 | */ | |
90 | if (whichfork == XFS_DATA_FORK) { | |
91 | maxleafents = MAXEXTNUM; | |
92 | sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS); | |
93 | } else { | |
94 | maxleafents = MAXAEXTNUM; | |
95 | sz = XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
96 | } | |
152d93b7 | 97 | maxrootrecs = xfs_bmdr_maxrecs(sz, 0); |
9e5987a7 DC |
98 | minleafrecs = mp->m_bmap_dmnr[0]; |
99 | minnoderecs = mp->m_bmap_dmnr[1]; | |
100 | maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; | |
101 | for (level = 1; maxblocks > 1; level++) { | |
102 | if (maxblocks <= maxrootrecs) | |
103 | maxblocks = 1; | |
104 | else | |
105 | maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; | |
106 | } | |
107 | mp->m_bm_maxlevels[whichfork] = level; | |
108 | } | |
91e11088 | 109 | |
fe033cc8 CH |
110 | STATIC int /* error */ |
111 | xfs_bmbt_lookup_eq( | |
112 | struct xfs_btree_cur *cur, | |
113 | xfs_fileoff_t off, | |
114 | xfs_fsblock_t bno, | |
115 | xfs_filblks_t len, | |
116 | int *stat) /* success/failure */ | |
117 | { | |
118 | cur->bc_rec.b.br_startoff = off; | |
119 | cur->bc_rec.b.br_startblock = bno; | |
120 | cur->bc_rec.b.br_blockcount = len; | |
121 | return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); | |
122 | } | |
123 | ||
124 | STATIC int /* error */ | |
125 | xfs_bmbt_lookup_ge( | |
126 | struct xfs_btree_cur *cur, | |
127 | xfs_fileoff_t off, | |
128 | xfs_fsblock_t bno, | |
129 | xfs_filblks_t len, | |
130 | int *stat) /* success/failure */ | |
131 | { | |
132 | cur->bc_rec.b.br_startoff = off; | |
133 | cur->bc_rec.b.br_startblock = bno; | |
134 | cur->bc_rec.b.br_blockcount = len; | |
135 | return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); | |
136 | } | |
137 | ||
278d0ca1 | 138 | /* |
8096b1eb CH |
139 | * Check if the inode needs to be converted to btree format. |
140 | */ | |
141 | static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) | |
142 | { | |
143 | return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && | |
144 | XFS_IFORK_NEXTENTS(ip, whichfork) > | |
145 | XFS_IFORK_MAXEXT(ip, whichfork); | |
146 | } | |
147 | ||
148 | /* | |
149 | * Check if the inode should be converted to extent format. | |
150 | */ | |
151 | static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork) | |
152 | { | |
153 | return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && | |
154 | XFS_IFORK_NEXTENTS(ip, whichfork) <= | |
155 | XFS_IFORK_MAXEXT(ip, whichfork); | |
156 | } | |
157 | ||
158 | /* | |
159 | * Update the record referred to by cur to the value given | |
278d0ca1 CH |
160 | * by [off, bno, len, state]. |
161 | * This either works (return 0) or gets an EFSCORRUPTED error. | |
162 | */ | |
163 | STATIC int | |
164 | xfs_bmbt_update( | |
165 | struct xfs_btree_cur *cur, | |
166 | xfs_fileoff_t off, | |
167 | xfs_fsblock_t bno, | |
168 | xfs_filblks_t len, | |
169 | xfs_exntst_t state) | |
170 | { | |
171 | union xfs_btree_rec rec; | |
172 | ||
173 | xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state); | |
174 | return xfs_btree_update(cur, &rec); | |
175 | } | |
fe033cc8 | 176 | |
1da177e4 | 177 | /* |
9e5987a7 DC |
178 | * Compute the worst-case number of indirect blocks that will be used |
179 | * for ip's delayed extent of length "len". | |
1da177e4 | 180 | */ |
9e5987a7 DC |
181 | STATIC xfs_filblks_t |
182 | xfs_bmap_worst_indlen( | |
183 | xfs_inode_t *ip, /* incore inode pointer */ | |
184 | xfs_filblks_t len) /* delayed extent length */ | |
1da177e4 | 185 | { |
9e5987a7 DC |
186 | int level; /* btree level number */ |
187 | int maxrecs; /* maximum record count at this level */ | |
188 | xfs_mount_t *mp; /* mount structure */ | |
189 | xfs_filblks_t rval; /* return value */ | |
1da177e4 LT |
190 | |
191 | mp = ip->i_mount; | |
9e5987a7 DC |
192 | maxrecs = mp->m_bmap_dmxr[0]; |
193 | for (level = 0, rval = 0; | |
194 | level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); | |
195 | level++) { | |
196 | len += maxrecs - 1; | |
197 | do_div(len, maxrecs); | |
198 | rval += len; | |
199 | if (len == 1) | |
200 | return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - | |
201 | level - 1; | |
202 | if (level == 0) | |
203 | maxrecs = mp->m_bmap_dmxr[1]; | |
1da177e4 | 204 | } |
9e5987a7 | 205 | return rval; |
1da177e4 LT |
206 | } |
207 | ||
208 | /* | |
9e5987a7 | 209 | * Calculate the default attribute fork offset for newly created inodes. |
1da177e4 | 210 | */ |
9e5987a7 DC |
211 | uint |
212 | xfs_default_attroffset( | |
213 | struct xfs_inode *ip) | |
1da177e4 | 214 | { |
9e5987a7 DC |
215 | struct xfs_mount *mp = ip->i_mount; |
216 | uint offset; | |
1da177e4 | 217 | |
9e5987a7 | 218 | if (mp->m_sb.sb_inodesize == 256) { |
56cea2d0 | 219 | offset = XFS_LITINO(mp, ip->i_d.di_version) - |
9e5987a7 DC |
220 | XFS_BMDR_SPACE_CALC(MINABTPTRS); |
221 | } else { | |
222 | offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); | |
1da177e4 | 223 | } |
9e5987a7 | 224 | |
56cea2d0 | 225 | ASSERT(offset < XFS_LITINO(mp, ip->i_d.di_version)); |
9e5987a7 | 226 | return offset; |
1da177e4 LT |
227 | } |
228 | ||
229 | /* | |
9e5987a7 DC |
230 | * Helper routine to reset inode di_forkoff field when switching |
231 | * attribute fork from local to extent format - we reset it where | |
232 | * possible to make space available for inline data fork extents. | |
1e82379b DC |
233 | */ |
234 | STATIC void | |
9e5987a7 | 235 | xfs_bmap_forkoff_reset( |
9e5987a7 DC |
236 | xfs_inode_t *ip, |
237 | int whichfork) | |
1e82379b | 238 | { |
9e5987a7 DC |
239 | if (whichfork == XFS_ATTR_FORK && |
240 | ip->i_d.di_format != XFS_DINODE_FMT_DEV && | |
241 | ip->i_d.di_format != XFS_DINODE_FMT_UUID && | |
242 | ip->i_d.di_format != XFS_DINODE_FMT_BTREE) { | |
243 | uint dfl_forkoff = xfs_default_attroffset(ip) >> 3; | |
244 | ||
245 | if (dfl_forkoff > ip->i_d.di_forkoff) | |
246 | ip->i_d.di_forkoff = dfl_forkoff; | |
247 | } | |
1e82379b DC |
248 | } |
249 | ||
9e5987a7 DC |
250 | /* |
251 | * Debug/sanity checking code | |
252 | */ | |
7574aa92 | 253 | |
9e5987a7 DC |
254 | STATIC int |
255 | xfs_bmap_sanity_check( | |
256 | struct xfs_mount *mp, | |
257 | struct xfs_buf *bp, | |
258 | int level) | |
259 | { | |
260 | struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); | |
7574aa92 | 261 | |
ee1a47ab CH |
262 | if (block->bb_magic != cpu_to_be32(XFS_BMAP_CRC_MAGIC) && |
263 | block->bb_magic != cpu_to_be32(XFS_BMAP_MAGIC)) | |
264 | return 0; | |
265 | ||
266 | if (be16_to_cpu(block->bb_level) != level || | |
9e5987a7 DC |
267 | be16_to_cpu(block->bb_numrecs) == 0 || |
268 | be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0]) | |
269 | return 0; | |
ee1a47ab | 270 | |
9e5987a7 DC |
271 | return 1; |
272 | } | |
7574aa92 | 273 | |
9e5987a7 DC |
274 | #ifdef DEBUG |
275 | STATIC struct xfs_buf * | |
276 | xfs_bmap_get_bp( | |
277 | struct xfs_btree_cur *cur, | |
278 | xfs_fsblock_t bno) | |
279 | { | |
280 | struct xfs_log_item_desc *lidp; | |
281 | int i; | |
7574aa92 | 282 | |
9e5987a7 DC |
283 | if (!cur) |
284 | return NULL; | |
285 | ||
286 | for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { | |
287 | if (!cur->bc_bufs[i]) | |
288 | break; | |
289 | if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) | |
290 | return cur->bc_bufs[i]; | |
1da177e4 | 291 | } |
7574aa92 | 292 | |
9e5987a7 DC |
293 | /* Chase down all the log items to see if the bp is there */ |
294 | list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) { | |
295 | struct xfs_buf_log_item *bip; | |
296 | bip = (struct xfs_buf_log_item *)lidp->lid_item; | |
297 | if (bip->bli_item.li_type == XFS_LI_BUF && | |
298 | XFS_BUF_ADDR(bip->bli_buf) == bno) | |
299 | return bip->bli_buf; | |
300 | } | |
7574aa92 | 301 | |
9e5987a7 DC |
302 | return NULL; |
303 | } | |
0b1b213f | 304 | |
9e5987a7 DC |
305 | STATIC void |
306 | xfs_check_block( | |
307 | struct xfs_btree_block *block, | |
308 | xfs_mount_t *mp, | |
309 | int root, | |
310 | short sz) | |
311 | { | |
312 | int i, j, dmxr; | |
313 | __be64 *pp, *thispa; /* pointer to block address */ | |
314 | xfs_bmbt_key_t *prevp, *keyp; | |
1da177e4 | 315 | |
9e5987a7 | 316 | ASSERT(be16_to_cpu(block->bb_level) > 0); |
ec90c556 | 317 | |
9e5987a7 DC |
318 | prevp = NULL; |
319 | for( i = 1; i <= xfs_btree_get_numrecs(block); i++) { | |
320 | dmxr = mp->m_bmap_dmxr[0]; | |
321 | keyp = XFS_BMBT_KEY_ADDR(mp, block, i); | |
0b1b213f | 322 | |
9e5987a7 DC |
323 | if (prevp) { |
324 | ASSERT(be64_to_cpu(prevp->br_startoff) < | |
325 | be64_to_cpu(keyp->br_startoff)); | |
1da177e4 | 326 | } |
9e5987a7 | 327 | prevp = keyp; |
1da177e4 | 328 | |
1da177e4 | 329 | /* |
9e5987a7 | 330 | * Compare the block numbers to see if there are dups. |
1da177e4 | 331 | */ |
9e5987a7 DC |
332 | if (root) |
333 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz); | |
334 | else | |
335 | pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr); | |
0b1b213f | 336 | |
9e5987a7 DC |
337 | for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { |
338 | if (root) | |
339 | thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz); | |
340 | else | |
341 | thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr); | |
342 | if (*thispa == *pp) { | |
343 | xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld", | |
344 | __func__, j, i, | |
345 | (unsigned long long)be64_to_cpu(*thispa)); | |
346 | panic("%s: ptrs are equal in node\n", | |
347 | __func__); | |
348 | } | |
1da177e4 | 349 | } |
9e5987a7 DC |
350 | } |
351 | } | |
1da177e4 | 352 | |
9e5987a7 DC |
353 | /* |
354 | * Check that the extents for the inode ip are in the right order in all | |
355 | * btree leaves. | |
356 | */ | |
0b1b213f | 357 | |
9e5987a7 DC |
358 | STATIC void |
359 | xfs_bmap_check_leaf_extents( | |
360 | xfs_btree_cur_t *cur, /* btree cursor or null */ | |
361 | xfs_inode_t *ip, /* incore inode pointer */ | |
362 | int whichfork) /* data or attr fork */ | |
363 | { | |
364 | struct xfs_btree_block *block; /* current btree block */ | |
365 | xfs_fsblock_t bno; /* block # of "block" */ | |
366 | xfs_buf_t *bp; /* buffer for "block" */ | |
367 | int error; /* error return value */ | |
368 | xfs_extnum_t i=0, j; /* index into the extents list */ | |
369 | xfs_ifork_t *ifp; /* fork structure */ | |
370 | int level; /* btree level, for checking */ | |
371 | xfs_mount_t *mp; /* file system mount structure */ | |
372 | __be64 *pp; /* pointer to block address */ | |
373 | xfs_bmbt_rec_t *ep; /* pointer to current extent */ | |
374 | xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */ | |
375 | xfs_bmbt_rec_t *nextp; /* pointer to next extent */ | |
376 | int bp_release = 0; | |
377 | ||
378 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) { | |
379 | return; | |
380 | } | |
381 | ||
382 | bno = NULLFSBLOCK; | |
383 | mp = ip->i_mount; | |
384 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
385 | block = ifp->if_broot; | |
386 | /* | |
387 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. | |
388 | */ | |
389 | level = be16_to_cpu(block->bb_level); | |
390 | ASSERT(level > 0); | |
391 | xfs_check_block(block, mp, 1, ifp->if_broot_bytes); | |
392 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); | |
393 | bno = be64_to_cpu(*pp); | |
394 | ||
d5cf09ba | 395 | ASSERT(bno != NULLFSBLOCK); |
9e5987a7 DC |
396 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
397 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
398 | ||
399 | /* | |
400 | * Go down the tree until leaf level is reached, following the first | |
401 | * pointer (leftmost) at each level. | |
402 | */ | |
403 | while (level-- > 0) { | |
404 | /* See if buf is in cur first */ | |
405 | bp_release = 0; | |
406 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
407 | if (!bp) { | |
408 | bp_release = 1; | |
409 | error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
410 | XFS_BMAP_BTREE_REF, | |
411 | &xfs_bmbt_buf_ops); | |
572a4cf0 | 412 | if (error) |
9e5987a7 | 413 | goto error_norelse; |
1da177e4 | 414 | } |
9e5987a7 DC |
415 | block = XFS_BUF_TO_BLOCK(bp); |
416 | XFS_WANT_CORRUPTED_GOTO( | |
417 | xfs_bmap_sanity_check(mp, bp, level), | |
418 | error0); | |
419 | if (level == 0) | |
420 | break; | |
1da177e4 | 421 | |
1da177e4 | 422 | /* |
9e5987a7 DC |
423 | * Check this block for basic sanity (increasing keys and |
424 | * no duplicate blocks). | |
1da177e4 | 425 | */ |
0b1b213f | 426 | |
9e5987a7 DC |
427 | xfs_check_block(block, mp, 0, 0); |
428 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); | |
429 | bno = be64_to_cpu(*pp); | |
430 | XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
431 | if (bp_release) { | |
432 | bp_release = 0; | |
433 | xfs_trans_brelse(NULL, bp); | |
1da177e4 | 434 | } |
9e5987a7 | 435 | } |
ec90c556 | 436 | |
9e5987a7 DC |
437 | /* |
438 | * Here with bp and block set to the leftmost leaf node in the tree. | |
439 | */ | |
440 | i = 0; | |
441 | ||
442 | /* | |
443 | * Loop over all leaf nodes checking that all extents are in the right order. | |
444 | */ | |
445 | for (;;) { | |
446 | xfs_fsblock_t nextbno; | |
447 | xfs_extnum_t num_recs; | |
448 | ||
449 | ||
450 | num_recs = xfs_btree_get_numrecs(block); | |
1da177e4 | 451 | |
1da177e4 | 452 | /* |
9e5987a7 | 453 | * Read-ahead the next leaf block, if any. |
1da177e4 | 454 | */ |
8096b1eb | 455 | |
9e5987a7 | 456 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1da177e4 | 457 | |
1da177e4 | 458 | /* |
9e5987a7 DC |
459 | * Check all the extents to make sure they are OK. |
460 | * If we had a previous block, the last entry should | |
461 | * conform with the first entry in this one. | |
1da177e4 | 462 | */ |
ec90c556 | 463 | |
9e5987a7 DC |
464 | ep = XFS_BMBT_REC_ADDR(mp, block, 1); |
465 | if (i) { | |
466 | ASSERT(xfs_bmbt_disk_get_startoff(&last) + | |
467 | xfs_bmbt_disk_get_blockcount(&last) <= | |
468 | xfs_bmbt_disk_get_startoff(ep)); | |
469 | } | |
470 | for (j = 1; j < num_recs; j++) { | |
471 | nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1); | |
472 | ASSERT(xfs_bmbt_disk_get_startoff(ep) + | |
473 | xfs_bmbt_disk_get_blockcount(ep) <= | |
474 | xfs_bmbt_disk_get_startoff(nextp)); | |
475 | ep = nextp; | |
476 | } | |
1da177e4 | 477 | |
9e5987a7 DC |
478 | last = *ep; |
479 | i += num_recs; | |
480 | if (bp_release) { | |
481 | bp_release = 0; | |
482 | xfs_trans_brelse(NULL, bp); | |
483 | } | |
484 | bno = nextbno; | |
1da177e4 | 485 | /* |
9e5987a7 | 486 | * If we've reached the end, stop. |
1da177e4 | 487 | */ |
9e5987a7 DC |
488 | if (bno == NULLFSBLOCK) |
489 | break; | |
8096b1eb | 490 | |
9e5987a7 DC |
491 | bp_release = 0; |
492 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
493 | if (!bp) { | |
494 | bp_release = 1; | |
495 | error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
496 | XFS_BMAP_BTREE_REF, | |
497 | &xfs_bmbt_buf_ops); | |
b9b984d7 | 498 | if (error) |
9e5987a7 | 499 | goto error_norelse; |
1da177e4 | 500 | } |
9e5987a7 | 501 | block = XFS_BUF_TO_BLOCK(bp); |
a5bd606b | 502 | } |
9e5987a7 DC |
503 | if (bp_release) { |
504 | bp_release = 0; | |
505 | xfs_trans_brelse(NULL, bp); | |
a5bd606b | 506 | } |
9e5987a7 | 507 | return; |
a5bd606b | 508 | |
9e5987a7 DC |
509 | error0: |
510 | xfs_warn(mp, "%s: at error0", __func__); | |
511 | if (bp_release) | |
512 | xfs_trans_brelse(NULL, bp); | |
513 | error_norelse: | |
514 | xfs_warn(mp, "%s: BAD after btree leaves for %d extents", | |
515 | __func__, i); | |
516 | panic("%s: CORRUPTED BTREE OR SOMETHING", __func__); | |
517 | return; | |
1da177e4 LT |
518 | } |
519 | ||
520 | /* | |
9e5987a7 | 521 | * Add bmap trace insert entries for all the contents of the extent records. |
1da177e4 | 522 | */ |
9e5987a7 DC |
523 | void |
524 | xfs_bmap_trace_exlist( | |
525 | xfs_inode_t *ip, /* incore inode pointer */ | |
526 | xfs_extnum_t cnt, /* count of entries in the list */ | |
527 | int whichfork, /* data or attr fork */ | |
528 | unsigned long caller_ip) | |
1da177e4 | 529 | { |
9e5987a7 DC |
530 | xfs_extnum_t idx; /* extent record index */ |
531 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
532 | int state = 0; | |
a5bd606b | 533 | |
9e5987a7 DC |
534 | if (whichfork == XFS_ATTR_FORK) |
535 | state |= BMAP_ATTRFORK; | |
a5bd606b | 536 | |
9e5987a7 DC |
537 | ifp = XFS_IFORK_PTR(ip, whichfork); |
538 | ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); | |
539 | for (idx = 0; idx < cnt; idx++) | |
540 | trace_xfs_extlist(ip, idx, whichfork, caller_ip); | |
541 | } | |
a5bd606b | 542 | |
9e5987a7 DC |
543 | /* |
544 | * Validate that the bmbt_irecs being returned from bmapi are valid | |
a97f4df7 ZYW |
545 | * given the caller's original parameters. Specifically check the |
546 | * ranges of the returned irecs to ensure that they only extend beyond | |
9e5987a7 DC |
547 | * the given parameters if the XFS_BMAPI_ENTIRE flag was set. |
548 | */ | |
549 | STATIC void | |
550 | xfs_bmap_validate_ret( | |
551 | xfs_fileoff_t bno, | |
552 | xfs_filblks_t len, | |
553 | int flags, | |
554 | xfs_bmbt_irec_t *mval, | |
555 | int nmap, | |
556 | int ret_nmap) | |
557 | { | |
558 | int i; /* index to map values */ | |
a5bd606b | 559 | |
9e5987a7 | 560 | ASSERT(ret_nmap <= nmap); |
a5bd606b | 561 | |
9e5987a7 DC |
562 | for (i = 0; i < ret_nmap; i++) { |
563 | ASSERT(mval[i].br_blockcount > 0); | |
564 | if (!(flags & XFS_BMAPI_ENTIRE)) { | |
565 | ASSERT(mval[i].br_startoff >= bno); | |
566 | ASSERT(mval[i].br_blockcount <= len); | |
567 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= | |
568 | bno + len); | |
569 | } else { | |
570 | ASSERT(mval[i].br_startoff < bno + len); | |
571 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount > | |
572 | bno); | |
573 | } | |
574 | ASSERT(i == 0 || | |
575 | mval[i - 1].br_startoff + mval[i - 1].br_blockcount == | |
576 | mval[i].br_startoff); | |
577 | ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && | |
578 | mval[i].br_startblock != HOLESTARTBLOCK); | |
579 | ASSERT(mval[i].br_state == XFS_EXT_NORM || | |
580 | mval[i].br_state == XFS_EXT_UNWRITTEN); | |
581 | } | |
582 | } | |
7574aa92 | 583 | |
9e5987a7 DC |
584 | #else |
585 | #define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0) | |
586 | #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) | |
587 | #endif /* DEBUG */ | |
7574aa92 | 588 | |
9e5987a7 DC |
589 | /* |
590 | * bmap free list manipulation functions | |
591 | */ | |
7574aa92 | 592 | |
9e5987a7 DC |
593 | /* |
594 | * Add the extent to the list of extents to be free at transaction end. | |
595 | * The list is maintained sorted (by block number). | |
596 | */ | |
597 | void | |
598 | xfs_bmap_add_free( | |
599 | xfs_fsblock_t bno, /* fs block number of extent */ | |
600 | xfs_filblks_t len, /* length of extent */ | |
601 | xfs_bmap_free_t *flist, /* list of extents */ | |
602 | xfs_mount_t *mp) /* mount point structure */ | |
603 | { | |
604 | xfs_bmap_free_item_t *cur; /* current (next) element */ | |
605 | xfs_bmap_free_item_t *new; /* new element */ | |
606 | xfs_bmap_free_item_t *prev; /* previous element */ | |
607 | #ifdef DEBUG | |
608 | xfs_agnumber_t agno; | |
609 | xfs_agblock_t agbno; | |
610 | ||
611 | ASSERT(bno != NULLFSBLOCK); | |
612 | ASSERT(len > 0); | |
613 | ASSERT(len <= MAXEXTLEN); | |
614 | ASSERT(!isnullstartblock(bno)); | |
615 | agno = XFS_FSB_TO_AGNO(mp, bno); | |
616 | agbno = XFS_FSB_TO_AGBNO(mp, bno); | |
617 | ASSERT(agno < mp->m_sb.sb_agcount); | |
618 | ASSERT(agbno < mp->m_sb.sb_agblocks); | |
619 | ASSERT(len < mp->m_sb.sb_agblocks); | |
620 | ASSERT(agbno + len <= mp->m_sb.sb_agblocks); | |
621 | #endif | |
622 | ASSERT(xfs_bmap_free_item_zone != NULL); | |
623 | new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP); | |
624 | new->xbfi_startblock = bno; | |
625 | new->xbfi_blockcount = (xfs_extlen_t)len; | |
626 | for (prev = NULL, cur = flist->xbf_first; | |
627 | cur != NULL; | |
628 | prev = cur, cur = cur->xbfi_next) { | |
629 | if (cur->xbfi_startblock >= bno) | |
630 | break; | |
1da177e4 | 631 | } |
9e5987a7 DC |
632 | if (prev) |
633 | prev->xbfi_next = new; | |
634 | else | |
635 | flist->xbf_first = new; | |
636 | new->xbfi_next = cur; | |
637 | flist->xbf_count++; | |
638 | } | |
7574aa92 | 639 | |
9e5987a7 DC |
640 | /* |
641 | * Remove the entry "free" from the free item list. Prev points to the | |
642 | * previous entry, unless "free" is the head of the list. | |
643 | */ | |
68988114 | 644 | void |
9e5987a7 DC |
645 | xfs_bmap_del_free( |
646 | xfs_bmap_free_t *flist, /* free item list header */ | |
647 | xfs_bmap_free_item_t *prev, /* previous item on list, if any */ | |
648 | xfs_bmap_free_item_t *free) /* list item to be freed */ | |
649 | { | |
650 | if (prev) | |
651 | prev->xbfi_next = free->xbfi_next; | |
652 | else | |
653 | flist->xbf_first = free->xbfi_next; | |
654 | flist->xbf_count--; | |
655 | kmem_zone_free(xfs_bmap_free_item_zone, free); | |
656 | } | |
657 | ||
9e5987a7 DC |
658 | /* |
659 | * Free up any items left in the list. | |
660 | */ | |
661 | void | |
662 | xfs_bmap_cancel( | |
663 | xfs_bmap_free_t *flist) /* list of bmap_free_items */ | |
664 | { | |
665 | xfs_bmap_free_item_t *free; /* free list item */ | |
666 | xfs_bmap_free_item_t *next; | |
ec90c556 | 667 | |
9e5987a7 DC |
668 | if (flist->xbf_count == 0) |
669 | return; | |
670 | ASSERT(flist->xbf_first != NULL); | |
671 | for (free = flist->xbf_first; free; free = next) { | |
672 | next = free->xbfi_next; | |
673 | xfs_bmap_del_free(flist, NULL, free); | |
674 | } | |
675 | ASSERT(flist->xbf_count == 0); | |
676 | } | |
0b1b213f | 677 | |
9e5987a7 DC |
678 | /* |
679 | * Inode fork format manipulation functions | |
680 | */ | |
1da177e4 | 681 | |
9e5987a7 DC |
682 | /* |
683 | * Transform a btree format file with only one leaf node, where the | |
684 | * extents list will fit in the inode, into an extents format file. | |
685 | * Since the file extents are already in-core, all we have to do is | |
686 | * give up the space for the btree root and pitch the leaf block. | |
687 | */ | |
688 | STATIC int /* error */ | |
689 | xfs_bmap_btree_to_extents( | |
690 | xfs_trans_t *tp, /* transaction pointer */ | |
691 | xfs_inode_t *ip, /* incore inode pointer */ | |
692 | xfs_btree_cur_t *cur, /* btree cursor */ | |
693 | int *logflagsp, /* inode logging flags */ | |
694 | int whichfork) /* data or attr fork */ | |
695 | { | |
696 | /* REFERENCED */ | |
697 | struct xfs_btree_block *cblock;/* child btree block */ | |
698 | xfs_fsblock_t cbno; /* child block number */ | |
699 | xfs_buf_t *cbp; /* child block's buffer */ | |
700 | int error; /* error return value */ | |
701 | xfs_ifork_t *ifp; /* inode fork data */ | |
702 | xfs_mount_t *mp; /* mount point structure */ | |
703 | __be64 *pp; /* ptr to block address */ | |
704 | struct xfs_btree_block *rblock;/* root btree block */ | |
1da177e4 | 705 | |
9e5987a7 DC |
706 | mp = ip->i_mount; |
707 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
708 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
709 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
710 | rblock = ifp->if_broot; | |
711 | ASSERT(be16_to_cpu(rblock->bb_level) == 1); | |
712 | ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); | |
713 | ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1); | |
714 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes); | |
715 | cbno = be64_to_cpu(*pp); | |
716 | *logflagsp = 0; | |
717 | #ifdef DEBUG | |
718 | if ((error = xfs_btree_check_lptr(cur, cbno, 1))) | |
719 | return error; | |
720 | #endif | |
721 | error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF, | |
722 | &xfs_bmbt_buf_ops); | |
723 | if (error) | |
724 | return error; | |
725 | cblock = XFS_BUF_TO_BLOCK(cbp); | |
726 | if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) | |
727 | return error; | |
728 | xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp); | |
729 | ip->i_d.di_nblocks--; | |
730 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); | |
731 | xfs_trans_binval(tp, cbp); | |
732 | if (cur->bc_bufs[0] == cbp) | |
733 | cur->bc_bufs[0] = NULL; | |
734 | xfs_iroot_realloc(ip, -1, whichfork); | |
735 | ASSERT(ifp->if_broot == NULL); | |
736 | ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); | |
737 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
738 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
739 | return 0; | |
740 | } | |
0b1b213f | 741 | |
9e5987a7 DC |
742 | /* |
743 | * Convert an extents-format file into a btree-format file. | |
744 | * The new file will have a root block (in the inode) and a single child block. | |
745 | */ | |
746 | STATIC int /* error */ | |
747 | xfs_bmap_extents_to_btree( | |
748 | xfs_trans_t *tp, /* transaction pointer */ | |
749 | xfs_inode_t *ip, /* incore inode pointer */ | |
750 | xfs_fsblock_t *firstblock, /* first-block-allocated */ | |
751 | xfs_bmap_free_t *flist, /* blocks freed in xaction */ | |
752 | xfs_btree_cur_t **curp, /* cursor returned to caller */ | |
753 | int wasdel, /* converting a delayed alloc */ | |
754 | int *logflagsp, /* inode logging flags */ | |
755 | int whichfork) /* data or attr fork */ | |
756 | { | |
757 | struct xfs_btree_block *ablock; /* allocated (child) bt block */ | |
758 | xfs_buf_t *abp; /* buffer for ablock */ | |
759 | xfs_alloc_arg_t args; /* allocation arguments */ | |
760 | xfs_bmbt_rec_t *arp; /* child record pointer */ | |
761 | struct xfs_btree_block *block; /* btree root block */ | |
762 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
763 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
764 | int error; /* error return value */ | |
765 | xfs_extnum_t i, cnt; /* extent record index */ | |
766 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
767 | xfs_bmbt_key_t *kp; /* root block key pointer */ | |
768 | xfs_mount_t *mp; /* mount structure */ | |
769 | xfs_extnum_t nextents; /* number of file extents */ | |
770 | xfs_bmbt_ptr_t *pp; /* root block address pointer */ | |
1da177e4 | 771 | |
ee1a47ab | 772 | mp = ip->i_mount; |
9e5987a7 DC |
773 | ifp = XFS_IFORK_PTR(ip, whichfork); |
774 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); | |
0b1b213f | 775 | |
9e5987a7 DC |
776 | /* |
777 | * Make space in the inode incore. | |
778 | */ | |
779 | xfs_iroot_realloc(ip, 1, whichfork); | |
780 | ifp->if_flags |= XFS_IFBROOT; | |
ec90c556 | 781 | |
9e5987a7 DC |
782 | /* |
783 | * Fill in the root. | |
784 | */ | |
785 | block = ifp->if_broot; | |
ee1a47ab CH |
786 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
787 | xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, | |
788 | XFS_BMAP_CRC_MAGIC, 1, 1, ip->i_ino, | |
789 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
790 | else | |
791 | xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, | |
792 | XFS_BMAP_MAGIC, 1, 1, ip->i_ino, | |
793 | XFS_BTREE_LONG_PTRS); | |
0b1b213f | 794 | |
9e5987a7 DC |
795 | /* |
796 | * Need a cursor. Can't allocate until bb_level is filled in. | |
797 | */ | |
9e5987a7 DC |
798 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); |
799 | cur->bc_private.b.firstblock = *firstblock; | |
800 | cur->bc_private.b.flist = flist; | |
801 | cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; | |
802 | /* | |
803 | * Convert to a btree with two levels, one record in root. | |
804 | */ | |
805 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); | |
806 | memset(&args, 0, sizeof(args)); | |
807 | args.tp = tp; | |
808 | args.mp = mp; | |
809 | args.firstblock = *firstblock; | |
810 | if (*firstblock == NULLFSBLOCK) { | |
811 | args.type = XFS_ALLOCTYPE_START_BNO; | |
812 | args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); | |
813 | } else if (flist->xbf_low) { | |
814 | args.type = XFS_ALLOCTYPE_START_BNO; | |
815 | args.fsbno = *firstblock; | |
816 | } else { | |
817 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
818 | args.fsbno = *firstblock; | |
819 | } | |
820 | args.minlen = args.maxlen = args.prod = 1; | |
821 | args.wasdel = wasdel; | |
822 | *logflagsp = 0; | |
823 | if ((error = xfs_alloc_vextent(&args))) { | |
824 | xfs_iroot_realloc(ip, -1, whichfork); | |
825 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
826 | return error; | |
827 | } | |
828 | /* | |
829 | * Allocation can't fail, the space was reserved. | |
830 | */ | |
831 | ASSERT(args.fsbno != NULLFSBLOCK); | |
832 | ASSERT(*firstblock == NULLFSBLOCK || | |
833 | args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) || | |
834 | (flist->xbf_low && | |
835 | args.agno > XFS_FSB_TO_AGNO(mp, *firstblock))); | |
836 | *firstblock = cur->bc_private.b.firstblock = args.fsbno; | |
837 | cur->bc_private.b.allocated++; | |
838 | ip->i_d.di_nblocks++; | |
839 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); | |
840 | abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0); | |
841 | /* | |
842 | * Fill in the child block. | |
843 | */ | |
844 | abp->b_ops = &xfs_bmbt_buf_ops; | |
845 | ablock = XFS_BUF_TO_BLOCK(abp); | |
ee1a47ab CH |
846 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
847 | xfs_btree_init_block_int(mp, ablock, abp->b_bn, | |
848 | XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino, | |
849 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
850 | else | |
851 | xfs_btree_init_block_int(mp, ablock, abp->b_bn, | |
852 | XFS_BMAP_MAGIC, 0, 0, ip->i_ino, | |
853 | XFS_BTREE_LONG_PTRS); | |
854 | ||
9e5987a7 DC |
855 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); |
856 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
857 | for (cnt = i = 0; i < nextents; i++) { | |
858 | ep = xfs_iext_get_ext(ifp, i); | |
859 | if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) { | |
860 | arp->l0 = cpu_to_be64(ep->l0); | |
861 | arp->l1 = cpu_to_be64(ep->l1); | |
862 | arp++; cnt++; | |
1da177e4 | 863 | } |
9e5987a7 DC |
864 | } |
865 | ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork)); | |
866 | xfs_btree_set_numrecs(ablock, cnt); | |
1da177e4 | 867 | |
9e5987a7 DC |
868 | /* |
869 | * Fill in the root key and pointer. | |
870 | */ | |
871 | kp = XFS_BMBT_KEY_ADDR(mp, block, 1); | |
872 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); | |
873 | kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp)); | |
874 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur, | |
875 | be16_to_cpu(block->bb_level))); | |
876 | *pp = cpu_to_be64(args.fsbno); | |
ec90c556 | 877 | |
9e5987a7 DC |
878 | /* |
879 | * Do all this logging at the end so that | |
880 | * the root is at the right level. | |
881 | */ | |
882 | xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS); | |
883 | xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); | |
884 | ASSERT(*curp == NULL); | |
885 | *curp = cur; | |
886 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork); | |
887 | return 0; | |
888 | } | |
ec90c556 | 889 | |
9e5987a7 DC |
890 | /* |
891 | * Convert a local file to an extents file. | |
892 | * This code is out of bounds for data forks of regular files, | |
893 | * since the file data needs to get logged so things will stay consistent. | |
894 | * (The bmap-level manipulations are ok, though). | |
895 | */ | |
f3508bcd DC |
896 | void |
897 | xfs_bmap_local_to_extents_empty( | |
898 | struct xfs_inode *ip, | |
899 | int whichfork) | |
900 | { | |
901 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
902 | ||
903 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
904 | ASSERT(ifp->if_bytes == 0); | |
905 | ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); | |
906 | ||
6a9edd3d | 907 | xfs_bmap_forkoff_reset(ip, whichfork); |
f3508bcd DC |
908 | ifp->if_flags &= ~XFS_IFINLINE; |
909 | ifp->if_flags |= XFS_IFEXTENTS; | |
910 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
911 | } | |
912 | ||
913 | ||
9e5987a7 DC |
914 | STATIC int /* error */ |
915 | xfs_bmap_local_to_extents( | |
916 | xfs_trans_t *tp, /* transaction pointer */ | |
917 | xfs_inode_t *ip, /* incore inode pointer */ | |
918 | xfs_fsblock_t *firstblock, /* first block allocated in xaction */ | |
919 | xfs_extlen_t total, /* total blocks needed by transaction */ | |
920 | int *logflagsp, /* inode logging flags */ | |
921 | int whichfork, | |
ee1a47ab CH |
922 | void (*init_fn)(struct xfs_trans *tp, |
923 | struct xfs_buf *bp, | |
9e5987a7 DC |
924 | struct xfs_inode *ip, |
925 | struct xfs_ifork *ifp)) | |
926 | { | |
f3508bcd | 927 | int error = 0; |
9e5987a7 DC |
928 | int flags; /* logging flags returned */ |
929 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
f3508bcd DC |
930 | xfs_alloc_arg_t args; /* allocation arguments */ |
931 | xfs_buf_t *bp; /* buffer for extent block */ | |
932 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
0b1b213f | 933 | |
9e5987a7 DC |
934 | /* |
935 | * We don't want to deal with the case of keeping inode data inline yet. | |
936 | * So sending the data fork of a regular inode is invalid. | |
937 | */ | |
938 | ASSERT(!(S_ISREG(ip->i_d.di_mode) && whichfork == XFS_DATA_FORK)); | |
939 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
940 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
f3508bcd DC |
941 | |
942 | if (!ifp->if_bytes) { | |
943 | xfs_bmap_local_to_extents_empty(ip, whichfork); | |
944 | flags = XFS_ILOG_CORE; | |
945 | goto done; | |
946 | } | |
947 | ||
9e5987a7 DC |
948 | flags = 0; |
949 | error = 0; | |
f3508bcd DC |
950 | ASSERT((ifp->if_flags & (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == |
951 | XFS_IFINLINE); | |
952 | memset(&args, 0, sizeof(args)); | |
953 | args.tp = tp; | |
954 | args.mp = ip->i_mount; | |
955 | args.firstblock = *firstblock; | |
956 | /* | |
957 | * Allocate a block. We know we need only one, since the | |
958 | * file currently fits in an inode. | |
959 | */ | |
960 | if (*firstblock == NULLFSBLOCK) { | |
961 | args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); | |
962 | args.type = XFS_ALLOCTYPE_START_BNO; | |
9e5987a7 | 963 | } else { |
f3508bcd DC |
964 | args.fsbno = *firstblock; |
965 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
9e5987a7 | 966 | } |
f3508bcd DC |
967 | args.total = total; |
968 | args.minlen = args.maxlen = args.prod = 1; | |
969 | error = xfs_alloc_vextent(&args); | |
970 | if (error) | |
971 | goto done; | |
972 | ||
973 | /* Can't fail, the space was reserved. */ | |
974 | ASSERT(args.fsbno != NULLFSBLOCK); | |
975 | ASSERT(args.len == 1); | |
976 | *firstblock = args.fsbno; | |
977 | bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); | |
978 | ||
979 | /* initialise the block and copy the data */ | |
980 | init_fn(tp, bp, ip, ifp); | |
981 | ||
982 | /* account for the change in fork size and log everything */ | |
983 | xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1); | |
984 | xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); | |
985 | xfs_bmap_local_to_extents_empty(ip, whichfork); | |
9e5987a7 | 986 | flags |= XFS_ILOG_CORE; |
f3508bcd DC |
987 | |
988 | xfs_iext_add(ifp, 0, 1); | |
989 | ep = xfs_iext_get_ext(ifp, 0); | |
990 | xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM); | |
991 | trace_xfs_bmap_post_update(ip, 0, | |
992 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0, | |
993 | _THIS_IP_); | |
994 | XFS_IFORK_NEXT_SET(ip, whichfork, 1); | |
995 | ip->i_d.di_nblocks = 1; | |
996 | xfs_trans_mod_dquot_byino(tp, ip, | |
997 | XFS_TRANS_DQ_BCOUNT, 1L); | |
998 | flags |= xfs_ilog_fext(whichfork); | |
999 | ||
9e5987a7 DC |
1000 | done: |
1001 | *logflagsp = flags; | |
1002 | return error; | |
1003 | } | |
ec90c556 | 1004 | |
9e5987a7 DC |
1005 | /* |
1006 | * Called from xfs_bmap_add_attrfork to handle btree format files. | |
1007 | */ | |
1008 | STATIC int /* error */ | |
1009 | xfs_bmap_add_attrfork_btree( | |
1010 | xfs_trans_t *tp, /* transaction pointer */ | |
1011 | xfs_inode_t *ip, /* incore inode pointer */ | |
1012 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
1013 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
1014 | int *flags) /* inode logging flags */ | |
1015 | { | |
1016 | xfs_btree_cur_t *cur; /* btree cursor */ | |
1017 | int error; /* error return value */ | |
1018 | xfs_mount_t *mp; /* file system mount struct */ | |
1019 | int stat; /* newroot status */ | |
ec90c556 | 1020 | |
9e5987a7 DC |
1021 | mp = ip->i_mount; |
1022 | if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip)) | |
1023 | *flags |= XFS_ILOG_DBROOT; | |
1024 | else { | |
1025 | cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); | |
1026 | cur->bc_private.b.flist = flist; | |
1027 | cur->bc_private.b.firstblock = *firstblock; | |
1028 | if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat))) | |
1029 | goto error0; | |
1030 | /* must be at least one entry */ | |
1031 | XFS_WANT_CORRUPTED_GOTO(stat == 1, error0); | |
1032 | if ((error = xfs_btree_new_iroot(cur, flags, &stat))) | |
1033 | goto error0; | |
1034 | if (stat == 0) { | |
1035 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
2451337d | 1036 | return -ENOSPC; |
1da177e4 | 1037 | } |
9e5987a7 DC |
1038 | *firstblock = cur->bc_private.b.firstblock; |
1039 | cur->bc_private.b.allocated = 0; | |
1040 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
1da177e4 | 1041 | } |
9e5987a7 DC |
1042 | return 0; |
1043 | error0: | |
1044 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
1045 | return error; | |
1046 | } | |
a5bd606b | 1047 | |
9e5987a7 DC |
1048 | /* |
1049 | * Called from xfs_bmap_add_attrfork to handle extents format files. | |
1050 | */ | |
1051 | STATIC int /* error */ | |
1052 | xfs_bmap_add_attrfork_extents( | |
1053 | xfs_trans_t *tp, /* transaction pointer */ | |
1054 | xfs_inode_t *ip, /* incore inode pointer */ | |
1055 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
1056 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
1057 | int *flags) /* inode logging flags */ | |
1058 | { | |
1059 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
1060 | int error; /* error return value */ | |
a5bd606b | 1061 | |
9e5987a7 DC |
1062 | if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip)) |
1063 | return 0; | |
1064 | cur = NULL; | |
1065 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0, | |
1066 | flags, XFS_DATA_FORK); | |
a5bd606b CH |
1067 | if (cur) { |
1068 | cur->bc_private.b.allocated = 0; | |
9e5987a7 DC |
1069 | xfs_btree_del_cursor(cur, |
1070 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
a5bd606b | 1071 | } |
1da177e4 | 1072 | return error; |
1da177e4 LT |
1073 | } |
1074 | ||
9e5987a7 DC |
1075 | /* |
1076 | * Called from xfs_bmap_add_attrfork to handle local format files. Each | |
1077 | * different data fork content type needs a different callout to do the | |
1078 | * conversion. Some are basic and only require special block initialisation | |
1079 | * callouts for the data formating, others (directories) are so specialised they | |
1080 | * handle everything themselves. | |
1081 | * | |
1082 | * XXX (dgc): investigate whether directory conversion can use the generic | |
1083 | * formatting callout. It should be possible - it's just a very complex | |
ee1a47ab | 1084 | * formatter. |
9e5987a7 DC |
1085 | */ |
1086 | STATIC int /* error */ | |
1087 | xfs_bmap_add_attrfork_local( | |
1088 | xfs_trans_t *tp, /* transaction pointer */ | |
1089 | xfs_inode_t *ip, /* incore inode pointer */ | |
1090 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
1091 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
1092 | int *flags) /* inode logging flags */ | |
1093 | { | |
1094 | xfs_da_args_t dargs; /* args for dir/attr code */ | |
7574aa92 | 1095 | |
9e5987a7 DC |
1096 | if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) |
1097 | return 0; | |
7574aa92 | 1098 | |
9e5987a7 DC |
1099 | if (S_ISDIR(ip->i_d.di_mode)) { |
1100 | memset(&dargs, 0, sizeof(dargs)); | |
d6cf1305 | 1101 | dargs.geo = ip->i_mount->m_dir_geo; |
9e5987a7 DC |
1102 | dargs.dp = ip; |
1103 | dargs.firstblock = firstblock; | |
1104 | dargs.flist = flist; | |
d6cf1305 | 1105 | dargs.total = dargs.geo->fsbcount; |
9e5987a7 DC |
1106 | dargs.whichfork = XFS_DATA_FORK; |
1107 | dargs.trans = tp; | |
1108 | return xfs_dir2_sf_to_block(&dargs); | |
1da177e4 | 1109 | } |
7574aa92 | 1110 | |
9e5987a7 DC |
1111 | if (S_ISLNK(ip->i_d.di_mode)) |
1112 | return xfs_bmap_local_to_extents(tp, ip, firstblock, 1, | |
1113 | flags, XFS_DATA_FORK, | |
1114 | xfs_symlink_local_to_remote); | |
7574aa92 | 1115 | |
f3508bcd DC |
1116 | /* should only be called for types that support local format data */ |
1117 | ASSERT(0); | |
2451337d | 1118 | return -EFSCORRUPTED; |
9e5987a7 | 1119 | } |
0b1b213f | 1120 | |
9e5987a7 DC |
1121 | /* |
1122 | * Convert inode from non-attributed to attributed. | |
1123 | * Must not be in a transaction, ip must not be locked. | |
1124 | */ | |
1125 | int /* error code */ | |
1126 | xfs_bmap_add_attrfork( | |
1127 | xfs_inode_t *ip, /* incore inode pointer */ | |
1128 | int size, /* space new attribute needs */ | |
1129 | int rsvd) /* xact may use reserved blks */ | |
1130 | { | |
1131 | xfs_fsblock_t firstblock; /* 1st block/ag allocated */ | |
1132 | xfs_bmap_free_t flist; /* freed extent records */ | |
1133 | xfs_mount_t *mp; /* mount structure */ | |
1134 | xfs_trans_t *tp; /* transaction pointer */ | |
1135 | int blks; /* space reservation */ | |
1136 | int version = 1; /* superblock attr version */ | |
1137 | int committed; /* xaction was committed */ | |
1138 | int logflags; /* logging flags */ | |
1139 | int error; /* error return value */ | |
9e3908e3 | 1140 | int cancel_flags = 0; |
0b1b213f | 1141 | |
9e5987a7 | 1142 | ASSERT(XFS_IFORK_Q(ip) == 0); |
1da177e4 | 1143 | |
9e5987a7 DC |
1144 | mp = ip->i_mount; |
1145 | ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); | |
1146 | tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK); | |
1147 | blks = XFS_ADDAFORK_SPACE_RES(mp); | |
1148 | if (rsvd) | |
1149 | tp->t_flags |= XFS_TRANS_RESERVE; | |
3d3c8b52 | 1150 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_addafork, blks, 0); |
9e3908e3 MT |
1151 | if (error) { |
1152 | xfs_trans_cancel(tp, 0); | |
1153 | return error; | |
1154 | } | |
1155 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
9e5987a7 DC |
1156 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
1157 | error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ? | |
1158 | XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : | |
1159 | XFS_QMOPT_RES_REGBLKS); | |
9e3908e3 MT |
1160 | if (error) |
1161 | goto trans_cancel; | |
1162 | cancel_flags |= XFS_TRANS_ABORT; | |
9e5987a7 | 1163 | if (XFS_IFORK_Q(ip)) |
9e3908e3 | 1164 | goto trans_cancel; |
9e5987a7 | 1165 | if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) { |
1da177e4 | 1166 | /* |
9e5987a7 | 1167 | * For inodes coming from pre-6.2 filesystems. |
1da177e4 | 1168 | */ |
9e5987a7 DC |
1169 | ASSERT(ip->i_d.di_aformat == 0); |
1170 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
1171 | } | |
1172 | ASSERT(ip->i_d.di_anextents == 0); | |
ec90c556 | 1173 | |
9e3908e3 | 1174 | xfs_trans_ijoin(tp, ip, 0); |
9e5987a7 | 1175 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
1da177e4 | 1176 | |
9e5987a7 DC |
1177 | switch (ip->i_d.di_format) { |
1178 | case XFS_DINODE_FMT_DEV: | |
1179 | ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; | |
1180 | break; | |
1181 | case XFS_DINODE_FMT_UUID: | |
1182 | ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3; | |
1183 | break; | |
1184 | case XFS_DINODE_FMT_LOCAL: | |
1185 | case XFS_DINODE_FMT_EXTENTS: | |
1186 | case XFS_DINODE_FMT_BTREE: | |
1187 | ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size); | |
1188 | if (!ip->i_d.di_forkoff) | |
1189 | ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3; | |
1190 | else if (mp->m_flags & XFS_MOUNT_ATTR2) | |
1191 | version = 2; | |
1da177e4 | 1192 | break; |
9e5987a7 DC |
1193 | default: |
1194 | ASSERT(0); | |
2451337d | 1195 | error = -EINVAL; |
9e3908e3 | 1196 | goto trans_cancel; |
9e5987a7 | 1197 | } |
1da177e4 | 1198 | |
9e5987a7 DC |
1199 | ASSERT(ip->i_afp == NULL); |
1200 | ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); | |
1201 | ip->i_afp->if_flags = XFS_IFEXTENTS; | |
1202 | logflags = 0; | |
1203 | xfs_bmap_init(&flist, &firstblock); | |
1204 | switch (ip->i_d.di_format) { | |
1205 | case XFS_DINODE_FMT_LOCAL: | |
1206 | error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist, | |
1207 | &logflags); | |
1208 | break; | |
1209 | case XFS_DINODE_FMT_EXTENTS: | |
1210 | error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock, | |
1211 | &flist, &logflags); | |
1212 | break; | |
1213 | case XFS_DINODE_FMT_BTREE: | |
1214 | error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist, | |
1215 | &logflags); | |
1216 | break; | |
1217 | default: | |
1218 | error = 0; | |
1da177e4 LT |
1219 | break; |
1220 | } | |
9e5987a7 DC |
1221 | if (logflags) |
1222 | xfs_trans_log_inode(tp, ip, logflags); | |
1223 | if (error) | |
9e3908e3 | 1224 | goto bmap_cancel; |
9e5987a7 DC |
1225 | if (!xfs_sb_version_hasattr(&mp->m_sb) || |
1226 | (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) { | |
1227 | __int64_t sbfields = 0; | |
1228 | ||
1229 | spin_lock(&mp->m_sb_lock); | |
1230 | if (!xfs_sb_version_hasattr(&mp->m_sb)) { | |
1231 | xfs_sb_version_addattr(&mp->m_sb); | |
1232 | sbfields |= XFS_SB_VERSIONNUM; | |
1233 | } | |
1234 | if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) { | |
1235 | xfs_sb_version_addattr2(&mp->m_sb); | |
1236 | sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2); | |
1237 | } | |
1238 | if (sbfields) { | |
1239 | spin_unlock(&mp->m_sb_lock); | |
1240 | xfs_mod_sb(tp, sbfields); | |
1241 | } else | |
1242 | spin_unlock(&mp->m_sb_lock); | |
1da177e4 | 1243 | } |
9e5987a7 DC |
1244 | |
1245 | error = xfs_bmap_finish(&tp, &flist, &committed); | |
1246 | if (error) | |
9e3908e3 MT |
1247 | goto bmap_cancel; |
1248 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
1249 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1250 | return error; | |
1251 | ||
1252 | bmap_cancel: | |
9e5987a7 | 1253 | xfs_bmap_cancel(&flist); |
9e3908e3 MT |
1254 | trans_cancel: |
1255 | xfs_trans_cancel(tp, cancel_flags); | |
9e5987a7 | 1256 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
9e5987a7 | 1257 | return error; |
1da177e4 LT |
1258 | } |
1259 | ||
1260 | /* | |
9e5987a7 | 1261 | * Internal and external extent tree search functions. |
1da177e4 | 1262 | */ |
a5bd606b | 1263 | |
9e5987a7 DC |
1264 | /* |
1265 | * Read in the extents to if_extents. | |
1266 | * All inode fields are set up by caller, we just traverse the btree | |
1267 | * and copy the records in. If the file system cannot contain unwritten | |
1268 | * extents, the records are checked for no "state" flags. | |
1269 | */ | |
1270 | int /* error */ | |
1271 | xfs_bmap_read_extents( | |
1272 | xfs_trans_t *tp, /* transaction pointer */ | |
1273 | xfs_inode_t *ip, /* incore inode */ | |
1274 | int whichfork) /* data or attr fork */ | |
1275 | { | |
1276 | struct xfs_btree_block *block; /* current btree block */ | |
1277 | xfs_fsblock_t bno; /* block # of "block" */ | |
1278 | xfs_buf_t *bp; /* buffer for "block" */ | |
1279 | int error; /* error return value */ | |
1280 | xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */ | |
1281 | xfs_extnum_t i, j; /* index into the extents list */ | |
1282 | xfs_ifork_t *ifp; /* fork structure */ | |
1283 | int level; /* btree level, for checking */ | |
1284 | xfs_mount_t *mp; /* file system mount structure */ | |
1285 | __be64 *pp; /* pointer to block address */ | |
1286 | /* REFERENCED */ | |
1287 | xfs_extnum_t room; /* number of entries there's room for */ | |
6ef35544 | 1288 | |
9e5987a7 DC |
1289 | bno = NULLFSBLOCK; |
1290 | mp = ip->i_mount; | |
1291 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1292 | exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE : | |
1293 | XFS_EXTFMT_INODE(ip); | |
1294 | block = ifp->if_broot; | |
1da177e4 | 1295 | /* |
9e5987a7 | 1296 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. |
1da177e4 | 1297 | */ |
9e5987a7 DC |
1298 | level = be16_to_cpu(block->bb_level); |
1299 | ASSERT(level > 0); | |
1300 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); | |
1301 | bno = be64_to_cpu(*pp); | |
d5cf09ba | 1302 | ASSERT(bno != NULLFSBLOCK); |
9e5987a7 DC |
1303 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
1304 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
1da177e4 | 1305 | /* |
9e5987a7 DC |
1306 | * Go down the tree until leaf level is reached, following the first |
1307 | * pointer (leftmost) at each level. | |
1da177e4 | 1308 | */ |
9e5987a7 DC |
1309 | while (level-- > 0) { |
1310 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
1311 | XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); | |
1312 | if (error) | |
1313 | return error; | |
1314 | block = XFS_BUF_TO_BLOCK(bp); | |
1315 | XFS_WANT_CORRUPTED_GOTO( | |
1316 | xfs_bmap_sanity_check(mp, bp, level), | |
1317 | error0); | |
1318 | if (level == 0) | |
1319 | break; | |
1320 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); | |
1321 | bno = be64_to_cpu(*pp); | |
1322 | XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
1323 | xfs_trans_brelse(tp, bp); | |
1da177e4 LT |
1324 | } |
1325 | /* | |
9e5987a7 | 1326 | * Here with bp and block set to the leftmost leaf node in the tree. |
1da177e4 | 1327 | */ |
9e5987a7 DC |
1328 | room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
1329 | i = 0; | |
1da177e4 | 1330 | /* |
9e5987a7 | 1331 | * Loop over all leaf nodes. Copy information to the extent records. |
1da177e4 | 1332 | */ |
9e5987a7 DC |
1333 | for (;;) { |
1334 | xfs_bmbt_rec_t *frp; | |
1335 | xfs_fsblock_t nextbno; | |
1336 | xfs_extnum_t num_recs; | |
1337 | xfs_extnum_t start; | |
0b1b213f | 1338 | |
9e5987a7 DC |
1339 | num_recs = xfs_btree_get_numrecs(block); |
1340 | if (unlikely(i + num_recs > room)) { | |
1341 | ASSERT(i + num_recs <= room); | |
1342 | xfs_warn(ip->i_mount, | |
1343 | "corrupt dinode %Lu, (btree extents).", | |
1344 | (unsigned long long) ip->i_ino); | |
1345 | XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)", | |
1346 | XFS_ERRLEVEL_LOW, ip->i_mount, block); | |
1347 | goto error0; | |
1da177e4 | 1348 | } |
9e5987a7 DC |
1349 | XFS_WANT_CORRUPTED_GOTO( |
1350 | xfs_bmap_sanity_check(mp, bp, 0), | |
1351 | error0); | |
1da177e4 | 1352 | /* |
9e5987a7 | 1353 | * Read-ahead the next leaf block, if any. |
1da177e4 | 1354 | */ |
9e5987a7 DC |
1355 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1356 | if (nextbno != NULLFSBLOCK) | |
1357 | xfs_btree_reada_bufl(mp, nextbno, 1, | |
1358 | &xfs_bmbt_buf_ops); | |
1da177e4 | 1359 | /* |
9e5987a7 | 1360 | * Copy records into the extent records. |
1da177e4 | 1361 | */ |
9e5987a7 DC |
1362 | frp = XFS_BMBT_REC_ADDR(mp, block, 1); |
1363 | start = i; | |
1364 | for (j = 0; j < num_recs; j++, i++, frp++) { | |
1365 | xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i); | |
1366 | trp->l0 = be64_to_cpu(frp->l0); | |
1367 | trp->l1 = be64_to_cpu(frp->l1); | |
1da177e4 | 1368 | } |
9e5987a7 DC |
1369 | if (exntf == XFS_EXTFMT_NOSTATE) { |
1370 | /* | |
1371 | * Check all attribute bmap btree records and | |
1372 | * any "older" data bmap btree records for a | |
1373 | * set bit in the "extent flag" position. | |
1374 | */ | |
1375 | if (unlikely(xfs_check_nostate_extents(ifp, | |
1376 | start, num_recs))) { | |
1377 | XFS_ERROR_REPORT("xfs_bmap_read_extents(2)", | |
1378 | XFS_ERRLEVEL_LOW, | |
1379 | ip->i_mount); | |
1380 | goto error0; | |
1381 | } | |
1382 | } | |
1383 | xfs_trans_brelse(tp, bp); | |
1384 | bno = nextbno; | |
1da177e4 | 1385 | /* |
9e5987a7 | 1386 | * If we've reached the end, stop. |
1da177e4 | 1387 | */ |
9e5987a7 DC |
1388 | if (bno == NULLFSBLOCK) |
1389 | break; | |
1390 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
1391 | XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); | |
1392 | if (error) | |
1393 | return error; | |
1394 | block = XFS_BUF_TO_BLOCK(bp); | |
1da177e4 | 1395 | } |
9e5987a7 DC |
1396 | ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); |
1397 | ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork)); | |
1398 | XFS_BMAP_TRACE_EXLIST(ip, i, whichfork); | |
1399 | return 0; | |
1400 | error0: | |
1401 | xfs_trans_brelse(tp, bp); | |
2451337d | 1402 | return -EFSCORRUPTED; |
9e5987a7 | 1403 | } |
a5bd606b | 1404 | |
a5bd606b | 1405 | |
9e5987a7 DC |
1406 | /* |
1407 | * Search the extent records for the entry containing block bno. | |
1408 | * If bno lies in a hole, point to the next entry. If bno lies | |
1409 | * past eof, *eofp will be set, and *prevp will contain the last | |
1410 | * entry (null if none). Else, *lastxp will be set to the index | |
1411 | * of the found entry; *gotp will contain the entry. | |
1412 | */ | |
1413 | STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */ | |
1414 | xfs_bmap_search_multi_extents( | |
1415 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
1416 | xfs_fileoff_t bno, /* block number searched for */ | |
1417 | int *eofp, /* out: end of file found */ | |
1418 | xfs_extnum_t *lastxp, /* out: last extent index */ | |
1419 | xfs_bmbt_irec_t *gotp, /* out: extent entry found */ | |
1420 | xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ | |
1421 | { | |
1422 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
1423 | xfs_extnum_t lastx; /* last extent index */ | |
a5bd606b | 1424 | |
9e5987a7 DC |
1425 | /* |
1426 | * Initialize the extent entry structure to catch access to | |
1427 | * uninitialized br_startblock field. | |
1428 | */ | |
1429 | gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL; | |
1430 | gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL; | |
1431 | gotp->br_state = XFS_EXT_INVALID; | |
9e5987a7 | 1432 | gotp->br_startblock = 0xffffa5a5a5a5a5a5LL; |
9e5987a7 | 1433 | prevp->br_startoff = NULLFILEOFF; |
c6534249 | 1434 | |
9e5987a7 DC |
1435 | ep = xfs_iext_bno_to_ext(ifp, bno, &lastx); |
1436 | if (lastx > 0) { | |
1437 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp); | |
1438 | } | |
1439 | if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) { | |
1440 | xfs_bmbt_get_all(ep, gotp); | |
1441 | *eofp = 0; | |
1442 | } else { | |
1443 | if (lastx > 0) { | |
1444 | *gotp = *prevp; | |
1445 | } | |
1446 | *eofp = 1; | |
1447 | ep = NULL; | |
1448 | } | |
1449 | *lastxp = lastx; | |
1450 | return ep; | |
1da177e4 LT |
1451 | } |
1452 | ||
dd9f438e | 1453 | /* |
9e5987a7 DC |
1454 | * Search the extents list for the inode, for the extent containing bno. |
1455 | * If bno lies in a hole, point to the next entry. If bno lies past eof, | |
1456 | * *eofp will be set, and *prevp will contain the last entry (null if none). | |
1457 | * Else, *lastxp will be set to the index of the found | |
1458 | * entry; *gotp will contain the entry. | |
dd9f438e | 1459 | */ |
9e5987a7 DC |
1460 | STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */ |
1461 | xfs_bmap_search_extents( | |
1462 | xfs_inode_t *ip, /* incore inode pointer */ | |
1463 | xfs_fileoff_t bno, /* block number searched for */ | |
1464 | int fork, /* data or attr fork */ | |
1465 | int *eofp, /* out: end of file found */ | |
1466 | xfs_extnum_t *lastxp, /* out: last extent index */ | |
1467 | xfs_bmbt_irec_t *gotp, /* out: extent entry found */ | |
1468 | xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ | |
dd9f438e | 1469 | { |
9e5987a7 DC |
1470 | xfs_ifork_t *ifp; /* inode fork pointer */ |
1471 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
dd9f438e | 1472 | |
9e5987a7 DC |
1473 | XFS_STATS_INC(xs_look_exlist); |
1474 | ifp = XFS_IFORK_PTR(ip, fork); | |
dd9f438e | 1475 | |
9e5987a7 | 1476 | ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp); |
dd9f438e | 1477 | |
9e5987a7 DC |
1478 | if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) && |
1479 | !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) { | |
1480 | xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO, | |
1481 | "Access to block zero in inode %llu " | |
1482 | "start_block: %llx start_off: %llx " | |
08e96e1a | 1483 | "blkcnt: %llx extent-state: %x lastx: %x", |
9e5987a7 DC |
1484 | (unsigned long long)ip->i_ino, |
1485 | (unsigned long long)gotp->br_startblock, | |
1486 | (unsigned long long)gotp->br_startoff, | |
1487 | (unsigned long long)gotp->br_blockcount, | |
1488 | gotp->br_state, *lastxp); | |
1489 | *lastxp = NULLEXTNUM; | |
1490 | *eofp = 1; | |
1491 | return NULL; | |
dd9f438e | 1492 | } |
9e5987a7 DC |
1493 | return ep; |
1494 | } | |
dd9f438e | 1495 | |
9e5987a7 DC |
1496 | /* |
1497 | * Returns the file-relative block number of the first unused block(s) | |
1498 | * in the file with at least "len" logically contiguous blocks free. | |
1499 | * This is the lowest-address hole if the file has holes, else the first block | |
1500 | * past the end of file. | |
1501 | * Return 0 if the file is currently local (in-inode). | |
1502 | */ | |
1503 | int /* error */ | |
1504 | xfs_bmap_first_unused( | |
1505 | xfs_trans_t *tp, /* transaction pointer */ | |
1506 | xfs_inode_t *ip, /* incore inode */ | |
1507 | xfs_extlen_t len, /* size of hole to find */ | |
1508 | xfs_fileoff_t *first_unused, /* unused block */ | |
1509 | int whichfork) /* data or attr fork */ | |
1510 | { | |
1511 | int error; /* error return value */ | |
1512 | int idx; /* extent record index */ | |
1513 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1514 | xfs_fileoff_t lastaddr; /* last block number seen */ | |
1515 | xfs_fileoff_t lowest; /* lowest useful block */ | |
1516 | xfs_fileoff_t max; /* starting useful block */ | |
1517 | xfs_fileoff_t off; /* offset for this block */ | |
1518 | xfs_extnum_t nextents; /* number of extent entries */ | |
1519 | ||
1520 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE || | |
1521 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS || | |
1522 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
1523 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { | |
1524 | *first_unused = 0; | |
1525 | return 0; | |
dd9f438e | 1526 | } |
9e5987a7 DC |
1527 | ifp = XFS_IFORK_PTR(ip, whichfork); |
1528 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
1529 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
1530 | return error; | |
1531 | lowest = *first_unused; | |
1532 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
1533 | for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) { | |
1534 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); | |
1535 | off = xfs_bmbt_get_startoff(ep); | |
1536 | /* | |
1537 | * See if the hole before this extent will work. | |
1538 | */ | |
1539 | if (off >= lowest + len && off - max >= len) { | |
1540 | *first_unused = max; | |
1541 | return 0; | |
1542 | } | |
1543 | lastaddr = off + xfs_bmbt_get_blockcount(ep); | |
1544 | max = XFS_FILEOFF_MAX(lastaddr, lowest); | |
dd9f438e | 1545 | } |
9e5987a7 DC |
1546 | *first_unused = max; |
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | /* | |
02bb4873 | 1551 | * Returns the file-relative block number of the last block - 1 before |
9e5987a7 DC |
1552 | * last_block (input value) in the file. |
1553 | * This is not based on i_size, it is based on the extent records. | |
1554 | * Returns 0 for local files, as they do not have extent records. | |
1555 | */ | |
1556 | int /* error */ | |
1557 | xfs_bmap_last_before( | |
1558 | xfs_trans_t *tp, /* transaction pointer */ | |
1559 | xfs_inode_t *ip, /* incore inode */ | |
1560 | xfs_fileoff_t *last_block, /* last block */ | |
1561 | int whichfork) /* data or attr fork */ | |
1562 | { | |
1563 | xfs_fileoff_t bno; /* input file offset */ | |
1564 | int eof; /* hit end of file */ | |
1565 | xfs_bmbt_rec_host_t *ep; /* pointer to last extent */ | |
1566 | int error; /* error return value */ | |
1567 | xfs_bmbt_irec_t got; /* current extent value */ | |
1568 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1569 | xfs_extnum_t lastx; /* last extent used */ | |
1570 | xfs_bmbt_irec_t prev; /* previous extent value */ | |
1571 | ||
1572 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && | |
1573 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
1574 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL) | |
2451337d | 1575 | return -EIO; |
9e5987a7 DC |
1576 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { |
1577 | *last_block = 0; | |
1578 | return 0; | |
1579 | } | |
1580 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1581 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
1582 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
1583 | return error; | |
1584 | bno = *last_block - 1; | |
1585 | ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
1586 | &prev); | |
1587 | if (eof || xfs_bmbt_get_startoff(ep) > bno) { | |
1588 | if (prev.br_startoff == NULLFILEOFF) | |
1589 | *last_block = 0; | |
dd9f438e | 1590 | else |
9e5987a7 | 1591 | *last_block = prev.br_startoff + prev.br_blockcount; |
dd9f438e | 1592 | } |
dd9f438e | 1593 | /* |
9e5987a7 | 1594 | * Otherwise *last_block is already the right answer. |
dd9f438e | 1595 | */ |
9e5987a7 DC |
1596 | return 0; |
1597 | } | |
1598 | ||
68988114 | 1599 | int |
9e5987a7 DC |
1600 | xfs_bmap_last_extent( |
1601 | struct xfs_trans *tp, | |
1602 | struct xfs_inode *ip, | |
1603 | int whichfork, | |
1604 | struct xfs_bmbt_irec *rec, | |
1605 | int *is_empty) | |
1606 | { | |
1607 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
1608 | int error; | |
1609 | int nextents; | |
1610 | ||
1611 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1612 | error = xfs_iread_extents(tp, ip, whichfork); | |
1613 | if (error) | |
1614 | return error; | |
dd9f438e NS |
1615 | } |
1616 | ||
9e5987a7 DC |
1617 | nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); |
1618 | if (nextents == 0) { | |
1619 | *is_empty = 1; | |
1620 | return 0; | |
1621 | } | |
dd9f438e | 1622 | |
9e5987a7 DC |
1623 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, nextents - 1), rec); |
1624 | *is_empty = 0; | |
dd9f438e NS |
1625 | return 0; |
1626 | } | |
1627 | ||
9e5987a7 DC |
1628 | /* |
1629 | * Check the last inode extent to determine whether this allocation will result | |
1630 | * in blocks being allocated at the end of the file. When we allocate new data | |
1631 | * blocks at the end of the file which do not start at the previous data block, | |
1632 | * we will try to align the new blocks at stripe unit boundaries. | |
1633 | * | |
6e708bcf | 1634 | * Returns 1 in bma->aeof if the file (fork) is empty as any new write will be |
9e5987a7 DC |
1635 | * at, or past the EOF. |
1636 | */ | |
1637 | STATIC int | |
1638 | xfs_bmap_isaeof( | |
1639 | struct xfs_bmalloca *bma, | |
1640 | int whichfork) | |
1da177e4 | 1641 | { |
9e5987a7 DC |
1642 | struct xfs_bmbt_irec rec; |
1643 | int is_empty; | |
1644 | int error; | |
1da177e4 | 1645 | |
9e5987a7 DC |
1646 | bma->aeof = 0; |
1647 | error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec, | |
1648 | &is_empty); | |
6e708bcf | 1649 | if (error) |
9e5987a7 | 1650 | return error; |
1da177e4 | 1651 | |
6e708bcf DC |
1652 | if (is_empty) { |
1653 | bma->aeof = 1; | |
1654 | return 0; | |
1655 | } | |
1656 | ||
1da177e4 | 1657 | /* |
9e5987a7 DC |
1658 | * Check if we are allocation or past the last extent, or at least into |
1659 | * the last delayed allocated extent. | |
1da177e4 | 1660 | */ |
9e5987a7 DC |
1661 | bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount || |
1662 | (bma->offset >= rec.br_startoff && | |
1663 | isnullstartblock(rec.br_startblock)); | |
1664 | return 0; | |
1665 | } | |
1da177e4 | 1666 | |
9e5987a7 DC |
1667 | /* |
1668 | * Returns the file-relative block number of the first block past eof in | |
1669 | * the file. This is not based on i_size, it is based on the extent records. | |
1670 | * Returns 0 for local files, as they do not have extent records. | |
1671 | */ | |
1672 | int | |
1673 | xfs_bmap_last_offset( | |
9e5987a7 DC |
1674 | struct xfs_inode *ip, |
1675 | xfs_fileoff_t *last_block, | |
1676 | int whichfork) | |
1677 | { | |
1678 | struct xfs_bmbt_irec rec; | |
1679 | int is_empty; | |
1680 | int error; | |
04e99455 | 1681 | |
9e5987a7 | 1682 | *last_block = 0; |
0892ccd6 | 1683 | |
9e5987a7 DC |
1684 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) |
1685 | return 0; | |
a365bdd5 | 1686 | |
9e5987a7 DC |
1687 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && |
1688 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
2451337d | 1689 | return -EIO; |
a365bdd5 | 1690 | |
9e5987a7 DC |
1691 | error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty); |
1692 | if (error || is_empty) | |
a365bdd5 | 1693 | return error; |
9e5987a7 DC |
1694 | |
1695 | *last_block = rec.br_startoff + rec.br_blockcount; | |
a365bdd5 NS |
1696 | return 0; |
1697 | } | |
1698 | ||
9e5987a7 DC |
1699 | /* |
1700 | * Returns whether the selected fork of the inode has exactly one | |
1701 | * block or not. For the data fork we check this matches di_size, | |
1702 | * implying the file's range is 0..bsize-1. | |
1703 | */ | |
1704 | int /* 1=>1 block, 0=>otherwise */ | |
1705 | xfs_bmap_one_block( | |
1706 | xfs_inode_t *ip, /* incore inode */ | |
1707 | int whichfork) /* data or attr fork */ | |
c467c049 | 1708 | { |
9e5987a7 DC |
1709 | xfs_bmbt_rec_host_t *ep; /* ptr to fork's extent */ |
1710 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1711 | int rval; /* return value */ | |
1712 | xfs_bmbt_irec_t s; /* internal version of extent */ | |
c467c049 | 1713 | |
9e5987a7 DC |
1714 | #ifndef DEBUG |
1715 | if (whichfork == XFS_DATA_FORK) | |
1716 | return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize; | |
1717 | #endif /* !DEBUG */ | |
1718 | if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1) | |
1719 | return 0; | |
1720 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
1721 | return 0; | |
1722 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1723 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
1724 | ep = xfs_iext_get_ext(ifp, 0); | |
1725 | xfs_bmbt_get_all(ep, &s); | |
1726 | rval = s.br_startoff == 0 && s.br_blockcount == 1; | |
1727 | if (rval && whichfork == XFS_DATA_FORK) | |
1728 | ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize); | |
1729 | return rval; | |
1730 | } | |
c467c049 | 1731 | |
9e5987a7 DC |
1732 | /* |
1733 | * Extent tree manipulation functions used during allocation. | |
1734 | */ | |
c467c049 | 1735 | |
9e5987a7 DC |
1736 | /* |
1737 | * Convert a delayed allocation to a real allocation. | |
1738 | */ | |
1739 | STATIC int /* error */ | |
1740 | xfs_bmap_add_extent_delay_real( | |
1741 | struct xfs_bmalloca *bma) | |
1742 | { | |
1743 | struct xfs_bmbt_irec *new = &bma->got; | |
1744 | int diff; /* temp value */ | |
1745 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ | |
1746 | int error; /* error return value */ | |
1747 | int i; /* temp state */ | |
1748 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1749 | xfs_fileoff_t new_endoff; /* end offset of new entry */ | |
1750 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
1751 | /* left is 0, right is 1, prev is 2 */ | |
1752 | int rval=0; /* return value (logging flags) */ | |
1753 | int state = 0;/* state bits, accessed thru macros */ | |
1754 | xfs_filblks_t da_new; /* new count del alloc blocks used */ | |
1755 | xfs_filblks_t da_old; /* old count del alloc blocks used */ | |
1756 | xfs_filblks_t temp=0; /* value for da_new calculations */ | |
1757 | xfs_filblks_t temp2=0;/* value for da_new calculations */ | |
1758 | int tmp_rval; /* partial logging flags */ | |
c467c049 | 1759 | |
9e5987a7 | 1760 | ifp = XFS_IFORK_PTR(bma->ip, XFS_DATA_FORK); |
c467c049 | 1761 | |
9e5987a7 DC |
1762 | ASSERT(bma->idx >= 0); |
1763 | ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); | |
1764 | ASSERT(!isnullstartblock(new->br_startblock)); | |
1765 | ASSERT(!bma->cur || | |
1766 | (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); | |
c467c049 | 1767 | |
9e5987a7 | 1768 | XFS_STATS_INC(xs_add_exlist); |
c467c049 | 1769 | |
9e5987a7 DC |
1770 | #define LEFT r[0] |
1771 | #define RIGHT r[1] | |
1772 | #define PREV r[2] | |
c467c049 CH |
1773 | |
1774 | /* | |
9e5987a7 | 1775 | * Set up a bunch of variables to make the tests simpler. |
c467c049 | 1776 | */ |
9e5987a7 DC |
1777 | ep = xfs_iext_get_ext(ifp, bma->idx); |
1778 | xfs_bmbt_get_all(ep, &PREV); | |
1779 | new_endoff = new->br_startoff + new->br_blockcount; | |
1780 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
1781 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
1782 | ||
1783 | da_old = startblockval(PREV.br_startblock); | |
1784 | da_new = 0; | |
1785 | ||
c467c049 | 1786 | /* |
9e5987a7 DC |
1787 | * Set flags determining what part of the previous delayed allocation |
1788 | * extent is being replaced by a real allocation. | |
c467c049 | 1789 | */ |
9e5987a7 DC |
1790 | if (PREV.br_startoff == new->br_startoff) |
1791 | state |= BMAP_LEFT_FILLING; | |
1792 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
1793 | state |= BMAP_RIGHT_FILLING; | |
c467c049 CH |
1794 | |
1795 | /* | |
9e5987a7 DC |
1796 | * Check and set flags if this segment has a left neighbor. |
1797 | * Don't set contiguous if the combined extent would be too large. | |
c467c049 | 1798 | */ |
9e5987a7 DC |
1799 | if (bma->idx > 0) { |
1800 | state |= BMAP_LEFT_VALID; | |
1801 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &LEFT); | |
a99ebf43 | 1802 | |
9e5987a7 DC |
1803 | if (isnullstartblock(LEFT.br_startblock)) |
1804 | state |= BMAP_LEFT_DELAY; | |
a365bdd5 | 1805 | } |
a365bdd5 | 1806 | |
9e5987a7 DC |
1807 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && |
1808 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
1809 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
1810 | LEFT.br_state == new->br_state && | |
1811 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
1812 | state |= BMAP_LEFT_CONTIG; | |
a365bdd5 | 1813 | |
1da177e4 | 1814 | /* |
9e5987a7 DC |
1815 | * Check and set flags if this segment has a right neighbor. |
1816 | * Don't set contiguous if the combined extent would be too large. | |
1817 | * Also check for all-three-contiguous being too large. | |
1da177e4 | 1818 | */ |
9e5987a7 DC |
1819 | if (bma->idx < bma->ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) { |
1820 | state |= BMAP_RIGHT_VALID; | |
1821 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx + 1), &RIGHT); | |
14b064ce | 1822 | |
9e5987a7 DC |
1823 | if (isnullstartblock(RIGHT.br_startblock)) |
1824 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 1825 | } |
9e5987a7 DC |
1826 | |
1827 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && | |
1828 | new_endoff == RIGHT.br_startoff && | |
1829 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
1830 | new->br_state == RIGHT.br_state && | |
1831 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
1832 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1833 | BMAP_RIGHT_FILLING)) != | |
1834 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1835 | BMAP_RIGHT_FILLING) || | |
1836 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
1837 | <= MAXEXTLEN)) | |
1838 | state |= BMAP_RIGHT_CONTIG; | |
1839 | ||
1840 | error = 0; | |
1da177e4 | 1841 | /* |
9e5987a7 | 1842 | * Switch out based on the FILLING and CONTIG state bits. |
1da177e4 | 1843 | */ |
9e5987a7 DC |
1844 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
1845 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
1846 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
1847 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
1da177e4 | 1848 | /* |
9e5987a7 DC |
1849 | * Filling in all of a previously delayed allocation extent. |
1850 | * The left and right neighbors are both contiguous with new. | |
1da177e4 | 1851 | */ |
9e5987a7 DC |
1852 | bma->idx--; |
1853 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1854 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
1855 | LEFT.br_blockcount + PREV.br_blockcount + | |
1856 | RIGHT.br_blockcount); | |
1857 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1858 | ||
1859 | xfs_iext_remove(bma->ip, bma->idx + 1, 2, state); | |
1860 | bma->ip->i_d.di_nextents--; | |
1861 | if (bma->cur == NULL) | |
1862 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1863 | else { | |
1864 | rval = XFS_ILOG_CORE; | |
1865 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
1866 | RIGHT.br_startblock, | |
1867 | RIGHT.br_blockcount, &i); | |
1868 | if (error) | |
1869 | goto done; | |
1870 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
1871 | error = xfs_btree_delete(bma->cur, &i); | |
1872 | if (error) | |
1873 | goto done; | |
1874 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
1875 | error = xfs_btree_decrement(bma->cur, 0, &i); | |
1876 | if (error) | |
1877 | goto done; | |
1878 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
1879 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, | |
1880 | LEFT.br_startblock, | |
1881 | LEFT.br_blockcount + | |
1882 | PREV.br_blockcount + | |
1883 | RIGHT.br_blockcount, LEFT.br_state); | |
1884 | if (error) | |
1885 | goto done; | |
1886 | } | |
1887 | break; | |
1888 | ||
1889 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
a365bdd5 | 1890 | /* |
9e5987a7 DC |
1891 | * Filling in all of a previously delayed allocation extent. |
1892 | * The left neighbor is contiguous, the right is not. | |
a365bdd5 | 1893 | */ |
9e5987a7 DC |
1894 | bma->idx--; |
1895 | ||
1896 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1897 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
1898 | LEFT.br_blockcount + PREV.br_blockcount); | |
1899 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1900 | ||
1901 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); | |
1902 | if (bma->cur == NULL) | |
1903 | rval = XFS_ILOG_DEXT; | |
1904 | else { | |
1905 | rval = 0; | |
1906 | error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, | |
1907 | LEFT.br_startblock, LEFT.br_blockcount, | |
1908 | &i); | |
1909 | if (error) | |
1910 | goto done; | |
1911 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
1912 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, | |
1913 | LEFT.br_startblock, | |
1914 | LEFT.br_blockcount + | |
1915 | PREV.br_blockcount, LEFT.br_state); | |
1916 | if (error) | |
1917 | goto done; | |
1918 | } | |
1919 | break; | |
1920 | ||
1921 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
0937e0fd | 1922 | /* |
9e5987a7 DC |
1923 | * Filling in all of a previously delayed allocation extent. |
1924 | * The right neighbor is contiguous, the left is not. | |
0937e0fd | 1925 | */ |
9e5987a7 DC |
1926 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1927 | xfs_bmbt_set_startblock(ep, new->br_startblock); | |
1928 | xfs_bmbt_set_blockcount(ep, | |
1929 | PREV.br_blockcount + RIGHT.br_blockcount); | |
1930 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
0937e0fd | 1931 | |
9e5987a7 DC |
1932 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); |
1933 | if (bma->cur == NULL) | |
1934 | rval = XFS_ILOG_DEXT; | |
1935 | else { | |
1936 | rval = 0; | |
1937 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
1938 | RIGHT.br_startblock, | |
1939 | RIGHT.br_blockcount, &i); | |
1940 | if (error) | |
1941 | goto done; | |
1942 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
1943 | error = xfs_bmbt_update(bma->cur, PREV.br_startoff, | |
1944 | new->br_startblock, | |
1945 | PREV.br_blockcount + | |
1946 | RIGHT.br_blockcount, PREV.br_state); | |
1947 | if (error) | |
1948 | goto done; | |
1949 | } | |
1950 | break; | |
1951 | ||
1952 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: | |
a365bdd5 | 1953 | /* |
9e5987a7 DC |
1954 | * Filling in all of a previously delayed allocation extent. |
1955 | * Neither the left nor right neighbors are contiguous with | |
1956 | * the new one. | |
a365bdd5 | 1957 | */ |
9e5987a7 DC |
1958 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1959 | xfs_bmbt_set_startblock(ep, new->br_startblock); | |
1960 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
a365bdd5 | 1961 | |
9e5987a7 DC |
1962 | bma->ip->i_d.di_nextents++; |
1963 | if (bma->cur == NULL) | |
1964 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1965 | else { | |
1966 | rval = XFS_ILOG_CORE; | |
1967 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
1968 | new->br_startblock, new->br_blockcount, | |
1969 | &i); | |
1970 | if (error) | |
1971 | goto done; | |
1972 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); | |
1973 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; | |
1974 | error = xfs_btree_insert(bma->cur, &i); | |
1975 | if (error) | |
1976 | goto done; | |
1977 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
1978 | } | |
1979 | break; | |
1da177e4 | 1980 | |
9e5987a7 | 1981 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
1da177e4 | 1982 | /* |
9e5987a7 DC |
1983 | * Filling in the first part of a previous delayed allocation. |
1984 | * The left neighbor is contiguous. | |
1da177e4 | 1985 | */ |
9e5987a7 DC |
1986 | trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_); |
1987 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx - 1), | |
1988 | LEFT.br_blockcount + new->br_blockcount); | |
1989 | xfs_bmbt_set_startoff(ep, | |
1990 | PREV.br_startoff + new->br_blockcount); | |
1991 | trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_); | |
1da177e4 | 1992 | |
9e5987a7 DC |
1993 | temp = PREV.br_blockcount - new->br_blockcount; |
1994 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1995 | xfs_bmbt_set_blockcount(ep, temp); | |
1996 | if (bma->cur == NULL) | |
1997 | rval = XFS_ILOG_DEXT; | |
1998 | else { | |
1999 | rval = 0; | |
2000 | error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, | |
2001 | LEFT.br_startblock, LEFT.br_blockcount, | |
2002 | &i); | |
2003 | if (error) | |
2004 | goto done; | |
2005 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2006 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, | |
2007 | LEFT.br_startblock, | |
2008 | LEFT.br_blockcount + | |
2009 | new->br_blockcount, | |
2010 | LEFT.br_state); | |
f3ca8738 | 2011 | if (error) |
1da177e4 | 2012 | goto done; |
1da177e4 | 2013 | } |
9e5987a7 DC |
2014 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
2015 | startblockval(PREV.br_startblock)); | |
2016 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2017 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2018 | ||
2019 | bma->idx--; | |
2020 | break; | |
2021 | ||
2022 | case BMAP_LEFT_FILLING: | |
1da177e4 | 2023 | /* |
9e5987a7 DC |
2024 | * Filling in the first part of a previous delayed allocation. |
2025 | * The left neighbor is not contiguous. | |
1da177e4 | 2026 | */ |
9e5987a7 DC |
2027 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
2028 | xfs_bmbt_set_startoff(ep, new_endoff); | |
2029 | temp = PREV.br_blockcount - new->br_blockcount; | |
2030 | xfs_bmbt_set_blockcount(ep, temp); | |
2031 | xfs_iext_insert(bma->ip, bma->idx, 1, new, state); | |
2032 | bma->ip->i_d.di_nextents++; | |
2033 | if (bma->cur == NULL) | |
2034 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1da177e4 | 2035 | else { |
9e5987a7 DC |
2036 | rval = XFS_ILOG_CORE; |
2037 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2038 | new->br_startblock, new->br_blockcount, | |
2039 | &i); | |
2040 | if (error) | |
2041 | goto done; | |
2042 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); | |
2043 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; | |
2044 | error = xfs_btree_insert(bma->cur, &i); | |
2045 | if (error) | |
1da177e4 | 2046 | goto done; |
6bd8fc8a | 2047 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 | 2048 | } |
233eebb9 | 2049 | |
9e5987a7 DC |
2050 | if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) { |
2051 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2052 | bma->firstblock, bma->flist, | |
2053 | &bma->cur, 1, &tmp_rval, XFS_DATA_FORK); | |
2054 | rval |= tmp_rval; | |
2055 | if (error) | |
2056 | goto done; | |
1da177e4 | 2057 | } |
9e5987a7 DC |
2058 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
2059 | startblockval(PREV.br_startblock) - | |
2060 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2061 | ep = xfs_iext_get_ext(ifp, bma->idx + 1); | |
2062 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2063 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
1da177e4 LT |
2064 | break; |
2065 | ||
9e5987a7 | 2066 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 | 2067 | /* |
9e5987a7 DC |
2068 | * Filling in the last part of a previous delayed allocation. |
2069 | * The right neighbor is contiguous with the new allocation. | |
1da177e4 | 2070 | */ |
9e5987a7 DC |
2071 | temp = PREV.br_blockcount - new->br_blockcount; |
2072 | trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
1da177e4 | 2073 | xfs_bmbt_set_blockcount(ep, temp); |
9e5987a7 DC |
2074 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx + 1), |
2075 | new->br_startoff, new->br_startblock, | |
2076 | new->br_blockcount + RIGHT.br_blockcount, | |
2077 | RIGHT.br_state); | |
2078 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
2079 | if (bma->cur == NULL) | |
2080 | rval = XFS_ILOG_DEXT; | |
2081 | else { | |
2082 | rval = 0; | |
2083 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
2084 | RIGHT.br_startblock, | |
2085 | RIGHT.br_blockcount, &i); | |
2086 | if (error) | |
2087 | goto done; | |
2088 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2089 | error = xfs_bmbt_update(bma->cur, new->br_startoff, | |
2090 | new->br_startblock, | |
2091 | new->br_blockcount + | |
2092 | RIGHT.br_blockcount, | |
2093 | RIGHT.br_state); | |
2094 | if (error) | |
2095 | goto done; | |
1da177e4 | 2096 | } |
9e5987a7 DC |
2097 | |
2098 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), | |
2099 | startblockval(PREV.br_startblock)); | |
2100 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2101 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2102 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2103 | ||
2104 | bma->idx++; | |
1da177e4 LT |
2105 | break; |
2106 | ||
9e5987a7 | 2107 | case BMAP_RIGHT_FILLING: |
1da177e4 | 2108 | /* |
9e5987a7 DC |
2109 | * Filling in the last part of a previous delayed allocation. |
2110 | * The right neighbor is not contiguous. | |
1da177e4 | 2111 | */ |
9e5987a7 DC |
2112 | temp = PREV.br_blockcount - new->br_blockcount; |
2113 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1da177e4 | 2114 | xfs_bmbt_set_blockcount(ep, temp); |
9e5987a7 DC |
2115 | xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state); |
2116 | bma->ip->i_d.di_nextents++; | |
2117 | if (bma->cur == NULL) | |
2118 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2119 | else { | |
2120 | rval = XFS_ILOG_CORE; | |
2121 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2122 | new->br_startblock, new->br_blockcount, | |
2123 | &i); | |
2124 | if (error) | |
2125 | goto done; | |
2126 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); | |
2127 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; | |
2128 | error = xfs_btree_insert(bma->cur, &i); | |
2129 | if (error) | |
2130 | goto done; | |
2131 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
1da177e4 | 2132 | } |
9e5987a7 DC |
2133 | |
2134 | if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) { | |
2135 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2136 | bma->firstblock, bma->flist, &bma->cur, 1, | |
2137 | &tmp_rval, XFS_DATA_FORK); | |
2138 | rval |= tmp_rval; | |
2139 | if (error) | |
2140 | goto done; | |
1da177e4 | 2141 | } |
9e5987a7 DC |
2142 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
2143 | startblockval(PREV.br_startblock) - | |
2144 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2145 | ep = xfs_iext_get_ext(ifp, bma->idx); | |
2146 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2147 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2148 | ||
2149 | bma->idx++; | |
1da177e4 LT |
2150 | break; |
2151 | ||
2152 | case 0: | |
2153 | /* | |
9e5987a7 DC |
2154 | * Filling in the middle part of a previous delayed allocation. |
2155 | * Contiguity is impossible here. | |
2156 | * This case is avoided almost all the time. | |
2157 | * | |
2158 | * We start with a delayed allocation: | |
2159 | * | |
2160 | * +ddddddddddddddddddddddddddddddddddddddddddddddddddddddd+ | |
2161 | * PREV @ idx | |
2162 | * | |
2163 | * and we are allocating: | |
2164 | * +rrrrrrrrrrrrrrrrr+ | |
2165 | * new | |
2166 | * | |
2167 | * and we set it up for insertion as: | |
2168 | * +ddddddddddddddddddd+rrrrrrrrrrrrrrrrr+ddddddddddddddddd+ | |
2169 | * new | |
2170 | * PREV @ idx LEFT RIGHT | |
2171 | * inserted at idx + 1 | |
1da177e4 | 2172 | */ |
9e5987a7 DC |
2173 | temp = new->br_startoff - PREV.br_startoff; |
2174 | temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
2175 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_); | |
2176 | xfs_bmbt_set_blockcount(ep, temp); /* truncate PREV */ | |
2177 | LEFT = *new; | |
2178 | RIGHT.br_state = PREV.br_state; | |
2179 | RIGHT.br_startblock = nullstartblock( | |
2180 | (int)xfs_bmap_worst_indlen(bma->ip, temp2)); | |
2181 | RIGHT.br_startoff = new_endoff; | |
2182 | RIGHT.br_blockcount = temp2; | |
2183 | /* insert LEFT (r[0]) and RIGHT (r[1]) at the same time */ | |
2184 | xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state); | |
2185 | bma->ip->i_d.di_nextents++; | |
2186 | if (bma->cur == NULL) | |
2187 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2188 | else { | |
2189 | rval = XFS_ILOG_CORE; | |
2190 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2191 | new->br_startblock, new->br_blockcount, | |
2192 | &i); | |
2193 | if (error) | |
2194 | goto done; | |
2195 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); | |
2196 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; | |
2197 | error = xfs_btree_insert(bma->cur, &i); | |
2198 | if (error) | |
2199 | goto done; | |
2200 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
1da177e4 | 2201 | } |
1da177e4 | 2202 | |
9e5987a7 DC |
2203 | if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) { |
2204 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2205 | bma->firstblock, bma->flist, &bma->cur, | |
2206 | 1, &tmp_rval, XFS_DATA_FORK); | |
2207 | rval |= tmp_rval; | |
2208 | if (error) | |
2209 | goto done; | |
2210 | } | |
2211 | temp = xfs_bmap_worst_indlen(bma->ip, temp); | |
2212 | temp2 = xfs_bmap_worst_indlen(bma->ip, temp2); | |
2213 | diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) - | |
2214 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2215 | if (diff > 0) { | |
2216 | error = xfs_icsb_modify_counters(bma->ip->i_mount, | |
2217 | XFS_SBS_FDBLOCKS, | |
2218 | -((int64_t)diff), 0); | |
2219 | ASSERT(!error); | |
2220 | if (error) | |
2221 | goto done; | |
2222 | } | |
2223 | ||
2224 | ep = xfs_iext_get_ext(ifp, bma->idx); | |
2225 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
2226 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2227 | trace_xfs_bmap_pre_update(bma->ip, bma->idx + 2, state, _THIS_IP_); | |
2228 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, bma->idx + 2), | |
2229 | nullstartblock((int)temp2)); | |
2230 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 2, state, _THIS_IP_); | |
2231 | ||
2232 | bma->idx++; | |
2233 | da_new = temp + temp2; | |
2234 | break; | |
2235 | ||
2236 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2237 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2238 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
2239 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
2240 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2241 | case BMAP_LEFT_CONTIG: | |
2242 | case BMAP_RIGHT_CONTIG: | |
2243 | /* | |
2244 | * These cases are all impossible. | |
2245 | */ | |
2246 | ASSERT(0); | |
2247 | } | |
2248 | ||
2249 | /* convert to a btree if necessary */ | |
2250 | if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) { | |
2251 | int tmp_logflags; /* partial log flag return val */ | |
2252 | ||
2253 | ASSERT(bma->cur == NULL); | |
2254 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2255 | bma->firstblock, bma->flist, &bma->cur, | |
2256 | da_old > 0, &tmp_logflags, XFS_DATA_FORK); | |
2257 | bma->logflags |= tmp_logflags; | |
2258 | if (error) | |
2259 | goto done; | |
2260 | } | |
2261 | ||
2262 | /* adjust for changes in reserved delayed indirect blocks */ | |
2263 | if (da_old || da_new) { | |
2264 | temp = da_new; | |
2265 | if (bma->cur) | |
2266 | temp += bma->cur->bc_private.b.allocated; | |
2267 | ASSERT(temp <= da_old); | |
2268 | if (temp < da_old) | |
2269 | xfs_icsb_modify_counters(bma->ip->i_mount, | |
2270 | XFS_SBS_FDBLOCKS, | |
2271 | (int64_t)(da_old - temp), 0); | |
96540c78 | 2272 | } |
9e5987a7 DC |
2273 | |
2274 | /* clear out the allocated field, done with it now in any case. */ | |
2275 | if (bma->cur) | |
2276 | bma->cur->bc_private.b.allocated = 0; | |
2277 | ||
2278 | xfs_bmap_check_leaf_extents(bma->cur, bma->ip, XFS_DATA_FORK); | |
1da177e4 | 2279 | done: |
9e5987a7 | 2280 | bma->logflags |= rval; |
1da177e4 | 2281 | return error; |
9e5987a7 DC |
2282 | #undef LEFT |
2283 | #undef RIGHT | |
2284 | #undef PREV | |
1da177e4 LT |
2285 | } |
2286 | ||
2287 | /* | |
9e5987a7 | 2288 | * Convert an unwritten allocation to a real allocation or vice versa. |
1da177e4 | 2289 | */ |
9e5987a7 DC |
2290 | STATIC int /* error */ |
2291 | xfs_bmap_add_extent_unwritten_real( | |
2292 | struct xfs_trans *tp, | |
2293 | xfs_inode_t *ip, /* incore inode pointer */ | |
2294 | xfs_extnum_t *idx, /* extent number to update/insert */ | |
2295 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
2296 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ | |
2297 | xfs_fsblock_t *first, /* pointer to firstblock variable */ | |
2298 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
2299 | int *logflagsp) /* inode logging flags */ | |
1da177e4 | 2300 | { |
9e5987a7 DC |
2301 | xfs_btree_cur_t *cur; /* btree cursor */ |
2302 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ | |
2303 | int error; /* error return value */ | |
2304 | int i; /* temp state */ | |
2305 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
2306 | xfs_fileoff_t new_endoff; /* end offset of new entry */ | |
2307 | xfs_exntst_t newext; /* new extent state */ | |
2308 | xfs_exntst_t oldext; /* old extent state */ | |
2309 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
2310 | /* left is 0, right is 1, prev is 2 */ | |
2311 | int rval=0; /* return value (logging flags) */ | |
2312 | int state = 0;/* state bits, accessed thru macros */ | |
1da177e4 | 2313 | |
9e5987a7 | 2314 | *logflagsp = 0; |
1da177e4 | 2315 | |
9e5987a7 DC |
2316 | cur = *curp; |
2317 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
8096b1eb | 2318 | |
9e5987a7 DC |
2319 | ASSERT(*idx >= 0); |
2320 | ASSERT(*idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); | |
2321 | ASSERT(!isnullstartblock(new->br_startblock)); | |
2322 | ||
2323 | XFS_STATS_INC(xs_add_exlist); | |
2324 | ||
2325 | #define LEFT r[0] | |
2326 | #define RIGHT r[1] | |
2327 | #define PREV r[2] | |
7cc95a82 | 2328 | |
1da177e4 | 2329 | /* |
9e5987a7 | 2330 | * Set up a bunch of variables to make the tests simpler. |
1da177e4 | 2331 | */ |
9e5987a7 DC |
2332 | error = 0; |
2333 | ep = xfs_iext_get_ext(ifp, *idx); | |
2334 | xfs_bmbt_get_all(ep, &PREV); | |
2335 | newext = new->br_state; | |
2336 | oldext = (newext == XFS_EXT_UNWRITTEN) ? | |
2337 | XFS_EXT_NORM : XFS_EXT_UNWRITTEN; | |
2338 | ASSERT(PREV.br_state == oldext); | |
2339 | new_endoff = new->br_startoff + new->br_blockcount; | |
2340 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
2341 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
7cc95a82 | 2342 | |
1da177e4 | 2343 | /* |
9e5987a7 DC |
2344 | * Set flags determining what part of the previous oldext allocation |
2345 | * extent is being replaced by a newext allocation. | |
1da177e4 | 2346 | */ |
9e5987a7 DC |
2347 | if (PREV.br_startoff == new->br_startoff) |
2348 | state |= BMAP_LEFT_FILLING; | |
2349 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
2350 | state |= BMAP_RIGHT_FILLING; | |
2351 | ||
1da177e4 | 2352 | /* |
9e5987a7 DC |
2353 | * Check and set flags if this segment has a left neighbor. |
2354 | * Don't set contiguous if the combined extent would be too large. | |
1da177e4 | 2355 | */ |
9e5987a7 DC |
2356 | if (*idx > 0) { |
2357 | state |= BMAP_LEFT_VALID; | |
2358 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &LEFT); | |
2359 | ||
2360 | if (isnullstartblock(LEFT.br_startblock)) | |
2361 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 2362 | } |
9e5987a7 DC |
2363 | |
2364 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
2365 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
2366 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
2367 | LEFT.br_state == newext && | |
2368 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2369 | state |= BMAP_LEFT_CONTIG; | |
2370 | ||
1da177e4 | 2371 | /* |
9e5987a7 DC |
2372 | * Check and set flags if this segment has a right neighbor. |
2373 | * Don't set contiguous if the combined extent would be too large. | |
2374 | * Also check for all-three-contiguous being too large. | |
1da177e4 | 2375 | */ |
9e5987a7 DC |
2376 | if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) { |
2377 | state |= BMAP_RIGHT_VALID; | |
2378 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx + 1), &RIGHT); | |
2379 | if (isnullstartblock(RIGHT.br_startblock)) | |
2380 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 2381 | } |
7cc95a82 | 2382 | |
9e5987a7 DC |
2383 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && |
2384 | new_endoff == RIGHT.br_startoff && | |
2385 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
2386 | newext == RIGHT.br_state && | |
2387 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
2388 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
2389 | BMAP_RIGHT_FILLING)) != | |
2390 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
2391 | BMAP_RIGHT_FILLING) || | |
2392 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
2393 | <= MAXEXTLEN)) | |
2394 | state |= BMAP_RIGHT_CONTIG; | |
136341b4 | 2395 | |
1da177e4 | 2396 | /* |
9e5987a7 | 2397 | * Switch out based on the FILLING and CONTIG state bits. |
1da177e4 | 2398 | */ |
9e5987a7 DC |
2399 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
2400 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
2401 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
2402 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
2403 | /* | |
2404 | * Setting all of a previous oldext extent to newext. | |
2405 | * The left and right neighbors are both contiguous with new. | |
2406 | */ | |
2407 | --*idx; | |
1a5902c5 | 2408 | |
9e5987a7 DC |
2409 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2410 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), | |
2411 | LEFT.br_blockcount + PREV.br_blockcount + | |
2412 | RIGHT.br_blockcount); | |
2413 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1a5902c5 | 2414 | |
9e5987a7 DC |
2415 | xfs_iext_remove(ip, *idx + 1, 2, state); |
2416 | ip->i_d.di_nextents -= 2; | |
2417 | if (cur == NULL) | |
2418 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2419 | else { | |
2420 | rval = XFS_ILOG_CORE; | |
2421 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
2422 | RIGHT.br_startblock, | |
2423 | RIGHT.br_blockcount, &i))) | |
2424 | goto done; | |
2425 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2426 | if ((error = xfs_btree_delete(cur, &i))) | |
2427 | goto done; | |
2428 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2429 | if ((error = xfs_btree_decrement(cur, 0, &i))) | |
2430 | goto done; | |
2431 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2432 | if ((error = xfs_btree_delete(cur, &i))) | |
2433 | goto done; | |
2434 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2435 | if ((error = xfs_btree_decrement(cur, 0, &i))) | |
2436 | goto done; | |
2437 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2438 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, | |
2439 | LEFT.br_startblock, | |
2440 | LEFT.br_blockcount + PREV.br_blockcount + | |
2441 | RIGHT.br_blockcount, LEFT.br_state))) | |
2442 | goto done; | |
2443 | } | |
2444 | break; | |
1a5902c5 | 2445 | |
9e5987a7 DC |
2446 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: |
2447 | /* | |
2448 | * Setting all of a previous oldext extent to newext. | |
2449 | * The left neighbor is contiguous, the right is not. | |
2450 | */ | |
2451 | --*idx; | |
d8cc890d | 2452 | |
9e5987a7 DC |
2453 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2454 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), | |
2455 | LEFT.br_blockcount + PREV.br_blockcount); | |
2456 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2457 | |
9e5987a7 DC |
2458 | xfs_iext_remove(ip, *idx + 1, 1, state); |
2459 | ip->i_d.di_nextents--; | |
2460 | if (cur == NULL) | |
2461 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2462 | else { | |
2463 | rval = XFS_ILOG_CORE; | |
2464 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2465 | PREV.br_startblock, PREV.br_blockcount, | |
2466 | &i))) | |
2467 | goto done; | |
2468 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2469 | if ((error = xfs_btree_delete(cur, &i))) | |
2470 | goto done; | |
2471 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2472 | if ((error = xfs_btree_decrement(cur, 0, &i))) | |
2473 | goto done; | |
2474 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2475 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, | |
2476 | LEFT.br_startblock, | |
2477 | LEFT.br_blockcount + PREV.br_blockcount, | |
2478 | LEFT.br_state))) | |
2479 | goto done; | |
2480 | } | |
2481 | break; | |
1da177e4 | 2482 | |
9e5987a7 | 2483 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 | 2484 | /* |
9e5987a7 DC |
2485 | * Setting all of a previous oldext extent to newext. |
2486 | * The right neighbor is contiguous, the left is not. | |
1da177e4 | 2487 | */ |
9e5987a7 DC |
2488 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2489 | xfs_bmbt_set_blockcount(ep, | |
2490 | PREV.br_blockcount + RIGHT.br_blockcount); | |
2491 | xfs_bmbt_set_state(ep, newext); | |
2492 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2493 | xfs_iext_remove(ip, *idx + 1, 1, state); | |
2494 | ip->i_d.di_nextents--; | |
2495 | if (cur == NULL) | |
2496 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2497 | else { | |
2498 | rval = XFS_ILOG_CORE; | |
2499 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
2500 | RIGHT.br_startblock, | |
2501 | RIGHT.br_blockcount, &i))) | |
2502 | goto done; | |
2503 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2504 | if ((error = xfs_btree_delete(cur, &i))) | |
2505 | goto done; | |
2506 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2507 | if ((error = xfs_btree_decrement(cur, 0, &i))) | |
2508 | goto done; | |
2509 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2510 | if ((error = xfs_bmbt_update(cur, new->br_startoff, | |
2511 | new->br_startblock, | |
2512 | new->br_blockcount + RIGHT.br_blockcount, | |
2513 | newext))) | |
2514 | goto done; | |
1da177e4 | 2515 | } |
9e5987a7 | 2516 | break; |
1e82379b | 2517 | |
9e5987a7 DC |
2518 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: |
2519 | /* | |
2520 | * Setting all of a previous oldext extent to newext. | |
2521 | * Neither the left nor right neighbors are contiguous with | |
2522 | * the new one. | |
2523 | */ | |
2524 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2525 | xfs_bmbt_set_state(ep, newext); | |
2526 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1e82379b | 2527 | |
9e5987a7 DC |
2528 | if (cur == NULL) |
2529 | rval = XFS_ILOG_DEXT; | |
2530 | else { | |
2531 | rval = 0; | |
2532 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2533 | new->br_startblock, new->br_blockcount, | |
2534 | &i))) | |
2535 | goto done; | |
2536 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2537 | if ((error = xfs_bmbt_update(cur, new->br_startoff, | |
2538 | new->br_startblock, new->br_blockcount, | |
2539 | newext))) | |
2540 | goto done; | |
2541 | } | |
2542 | break; | |
1e82379b | 2543 | |
9e5987a7 DC |
2544 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
2545 | /* | |
2546 | * Setting the first part of a previous oldext extent to newext. | |
2547 | * The left neighbor is contiguous. | |
2548 | */ | |
2549 | trace_xfs_bmap_pre_update(ip, *idx - 1, state, _THIS_IP_); | |
2550 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx - 1), | |
2551 | LEFT.br_blockcount + new->br_blockcount); | |
2552 | xfs_bmbt_set_startoff(ep, | |
2553 | PREV.br_startoff + new->br_blockcount); | |
2554 | trace_xfs_bmap_post_update(ip, *idx - 1, state, _THIS_IP_); | |
1da177e4 | 2555 | |
9e5987a7 DC |
2556 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2557 | xfs_bmbt_set_startblock(ep, | |
2558 | new->br_startblock + new->br_blockcount); | |
2559 | xfs_bmbt_set_blockcount(ep, | |
2560 | PREV.br_blockcount - new->br_blockcount); | |
2561 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
0293ce3a | 2562 | |
9e5987a7 | 2563 | --*idx; |
8867bc9b | 2564 | |
9e5987a7 DC |
2565 | if (cur == NULL) |
2566 | rval = XFS_ILOG_DEXT; | |
2567 | else { | |
2568 | rval = 0; | |
2569 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2570 | PREV.br_startblock, PREV.br_blockcount, | |
2571 | &i))) | |
2572 | goto done; | |
2573 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2574 | if ((error = xfs_bmbt_update(cur, | |
2575 | PREV.br_startoff + new->br_blockcount, | |
2576 | PREV.br_startblock + new->br_blockcount, | |
2577 | PREV.br_blockcount - new->br_blockcount, | |
2578 | oldext))) | |
2579 | goto done; | |
2580 | if ((error = xfs_btree_decrement(cur, 0, &i))) | |
2581 | goto done; | |
2582 | error = xfs_bmbt_update(cur, LEFT.br_startoff, | |
2583 | LEFT.br_startblock, | |
2584 | LEFT.br_blockcount + new->br_blockcount, | |
2585 | LEFT.br_state); | |
2586 | if (error) | |
2587 | goto done; | |
8867bc9b | 2588 | } |
9e5987a7 | 2589 | break; |
0293ce3a | 2590 | |
9e5987a7 DC |
2591 | case BMAP_LEFT_FILLING: |
2592 | /* | |
2593 | * Setting the first part of a previous oldext extent to newext. | |
2594 | * The left neighbor is not contiguous. | |
2595 | */ | |
2596 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2597 | ASSERT(ep && xfs_bmbt_get_state(ep) == oldext); | |
2598 | xfs_bmbt_set_startoff(ep, new_endoff); | |
2599 | xfs_bmbt_set_blockcount(ep, | |
2600 | PREV.br_blockcount - new->br_blockcount); | |
2601 | xfs_bmbt_set_startblock(ep, | |
2602 | new->br_startblock + new->br_blockcount); | |
2603 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2604 | |
9e5987a7 DC |
2605 | xfs_iext_insert(ip, *idx, 1, new, state); |
2606 | ip->i_d.di_nextents++; | |
2607 | if (cur == NULL) | |
2608 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2609 | else { | |
2610 | rval = XFS_ILOG_CORE; | |
2611 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2612 | PREV.br_startblock, PREV.br_blockcount, | |
2613 | &i))) | |
2614 | goto done; | |
2615 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2616 | if ((error = xfs_bmbt_update(cur, | |
2617 | PREV.br_startoff + new->br_blockcount, | |
2618 | PREV.br_startblock + new->br_blockcount, | |
2619 | PREV.br_blockcount - new->br_blockcount, | |
2620 | oldext))) | |
2621 | goto done; | |
2622 | cur->bc_rec.b = *new; | |
2623 | if ((error = xfs_btree_insert(cur, &i))) | |
2624 | goto done; | |
2625 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2626 | } | |
2627 | break; | |
1da177e4 | 2628 | |
9e5987a7 DC |
2629 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
2630 | /* | |
2631 | * Setting the last part of a previous oldext extent to newext. | |
2632 | * The right neighbor is contiguous with the new allocation. | |
2633 | */ | |
2634 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2635 | xfs_bmbt_set_blockcount(ep, | |
2636 | PREV.br_blockcount - new->br_blockcount); | |
2637 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
0293ce3a | 2638 | |
9e5987a7 | 2639 | ++*idx; |
1da177e4 | 2640 | |
9e5987a7 DC |
2641 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2642 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), | |
2643 | new->br_startoff, new->br_startblock, | |
2644 | new->br_blockcount + RIGHT.br_blockcount, newext); | |
2645 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2646 | |
9e5987a7 DC |
2647 | if (cur == NULL) |
2648 | rval = XFS_ILOG_DEXT; | |
2649 | else { | |
2650 | rval = 0; | |
2651 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2652 | PREV.br_startblock, | |
2653 | PREV.br_blockcount, &i))) | |
2654 | goto done; | |
2655 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2656 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, | |
2657 | PREV.br_startblock, | |
2658 | PREV.br_blockcount - new->br_blockcount, | |
2659 | oldext))) | |
2660 | goto done; | |
2661 | if ((error = xfs_btree_increment(cur, 0, &i))) | |
2662 | goto done; | |
2663 | if ((error = xfs_bmbt_update(cur, new->br_startoff, | |
2664 | new->br_startblock, | |
2665 | new->br_blockcount + RIGHT.br_blockcount, | |
2666 | newext))) | |
2667 | goto done; | |
2668 | } | |
2669 | break; | |
1da177e4 | 2670 | |
9e5987a7 DC |
2671 | case BMAP_RIGHT_FILLING: |
2672 | /* | |
2673 | * Setting the last part of a previous oldext extent to newext. | |
2674 | * The right neighbor is not contiguous. | |
2675 | */ | |
2676 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2677 | xfs_bmbt_set_blockcount(ep, | |
2678 | PREV.br_blockcount - new->br_blockcount); | |
2679 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2680 | |
9e5987a7 DC |
2681 | ++*idx; |
2682 | xfs_iext_insert(ip, *idx, 1, new, state); | |
d8cc890d | 2683 | |
9e5987a7 DC |
2684 | ip->i_d.di_nextents++; |
2685 | if (cur == NULL) | |
2686 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2687 | else { | |
2688 | rval = XFS_ILOG_CORE; | |
2689 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2690 | PREV.br_startblock, PREV.br_blockcount, | |
2691 | &i))) | |
2692 | goto done; | |
2693 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2694 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, | |
2695 | PREV.br_startblock, | |
2696 | PREV.br_blockcount - new->br_blockcount, | |
2697 | oldext))) | |
2698 | goto done; | |
2699 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2700 | new->br_startblock, new->br_blockcount, | |
2701 | &i))) | |
2702 | goto done; | |
2703 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); | |
2704 | cur->bc_rec.b.br_state = XFS_EXT_NORM; | |
2705 | if ((error = xfs_btree_insert(cur, &i))) | |
2706 | goto done; | |
2707 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2708 | } | |
2709 | break; | |
2710 | ||
2711 | case 0: | |
1da177e4 | 2712 | /* |
9e5987a7 DC |
2713 | * Setting the middle part of a previous oldext extent to |
2714 | * newext. Contiguity is impossible here. | |
2715 | * One extent becomes three extents. | |
1da177e4 | 2716 | */ |
9e5987a7 DC |
2717 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2718 | xfs_bmbt_set_blockcount(ep, | |
2719 | new->br_startoff - PREV.br_startoff); | |
2720 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
898621d5 | 2721 | |
9e5987a7 DC |
2722 | r[0] = *new; |
2723 | r[1].br_startoff = new_endoff; | |
2724 | r[1].br_blockcount = | |
2725 | PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
2726 | r[1].br_startblock = new->br_startblock + new->br_blockcount; | |
2727 | r[1].br_state = oldext; | |
898621d5 | 2728 | |
9e5987a7 DC |
2729 | ++*idx; |
2730 | xfs_iext_insert(ip, *idx, 2, &r[0], state); | |
2731 | ||
2732 | ip->i_d.di_nextents += 2; | |
2733 | if (cur == NULL) | |
2734 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2735 | else { | |
2736 | rval = XFS_ILOG_CORE; | |
2737 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2738 | PREV.br_startblock, PREV.br_blockcount, | |
2739 | &i))) | |
2740 | goto done; | |
2741 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2742 | /* new right extent - oldext */ | |
2743 | if ((error = xfs_bmbt_update(cur, r[1].br_startoff, | |
2744 | r[1].br_startblock, r[1].br_blockcount, | |
2745 | r[1].br_state))) | |
2746 | goto done; | |
2747 | /* new left extent - oldext */ | |
2748 | cur->bc_rec.b = PREV; | |
2749 | cur->bc_rec.b.br_blockcount = | |
2750 | new->br_startoff - PREV.br_startoff; | |
2751 | if ((error = xfs_btree_insert(cur, &i))) | |
2752 | goto done; | |
2753 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2754 | /* | |
2755 | * Reset the cursor to the position of the new extent | |
2756 | * we are about to insert as we can't trust it after | |
2757 | * the previous insert. | |
2758 | */ | |
2759 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2760 | new->br_startblock, new->br_blockcount, | |
2761 | &i))) | |
2762 | goto done; | |
2763 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); | |
2764 | /* new middle extent - newext */ | |
2765 | cur->bc_rec.b.br_state = new->br_state; | |
2766 | if ((error = xfs_btree_insert(cur, &i))) | |
2767 | goto done; | |
2768 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
2769 | } | |
1da177e4 | 2770 | break; |
9e5987a7 DC |
2771 | |
2772 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2773 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2774 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
2775 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
2776 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2777 | case BMAP_LEFT_CONTIG: | |
2778 | case BMAP_RIGHT_CONTIG: | |
2779 | /* | |
2780 | * These cases are all impossible. | |
2781 | */ | |
1da177e4 | 2782 | ASSERT(0); |
1da177e4 | 2783 | } |
8096b1eb | 2784 | |
9e5987a7 DC |
2785 | /* convert to a btree if necessary */ |
2786 | if (xfs_bmap_needs_btree(ip, XFS_DATA_FORK)) { | |
2787 | int tmp_logflags; /* partial log flag return val */ | |
2788 | ||
2789 | ASSERT(cur == NULL); | |
2790 | error = xfs_bmap_extents_to_btree(tp, ip, first, flist, &cur, | |
2791 | 0, &tmp_logflags, XFS_DATA_FORK); | |
2792 | *logflagsp |= tmp_logflags; | |
2793 | if (error) | |
2794 | goto done; | |
1da177e4 | 2795 | } |
da087bad | 2796 | |
9e5987a7 DC |
2797 | /* clear out the allocated field, done with it now in any case. */ |
2798 | if (cur) { | |
2799 | cur->bc_private.b.allocated = 0; | |
2800 | *curp = cur; | |
1da177e4 | 2801 | } |
8096b1eb | 2802 | |
9e5987a7 DC |
2803 | xfs_bmap_check_leaf_extents(*curp, ip, XFS_DATA_FORK); |
2804 | done: | |
2805 | *logflagsp |= rval; | |
1da177e4 | 2806 | return error; |
9e5987a7 DC |
2807 | #undef LEFT |
2808 | #undef RIGHT | |
2809 | #undef PREV | |
1da177e4 LT |
2810 | } |
2811 | ||
2812 | /* | |
9e5987a7 | 2813 | * Convert a hole to a delayed allocation. |
1da177e4 | 2814 | */ |
9e5987a7 DC |
2815 | STATIC void |
2816 | xfs_bmap_add_extent_hole_delay( | |
2817 | xfs_inode_t *ip, /* incore inode pointer */ | |
2818 | xfs_extnum_t *idx, /* extent number to update/insert */ | |
2819 | xfs_bmbt_irec_t *new) /* new data to add to file extents */ | |
1da177e4 | 2820 | { |
9e5987a7 DC |
2821 | xfs_ifork_t *ifp; /* inode fork pointer */ |
2822 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ | |
2823 | xfs_filblks_t newlen=0; /* new indirect size */ | |
2824 | xfs_filblks_t oldlen=0; /* old indirect size */ | |
2825 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
2826 | int state; /* state bits, accessed thru macros */ | |
2827 | xfs_filblks_t temp=0; /* temp for indirect calculations */ | |
1da177e4 | 2828 | |
9e5987a7 DC |
2829 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
2830 | state = 0; | |
2831 | ASSERT(isnullstartblock(new->br_startblock)); | |
1da177e4 LT |
2832 | |
2833 | /* | |
9e5987a7 | 2834 | * Check and set flags if this segment has a left neighbor |
1da177e4 | 2835 | */ |
9e5987a7 DC |
2836 | if (*idx > 0) { |
2837 | state |= BMAP_LEFT_VALID; | |
2838 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &left); | |
2839 | ||
2840 | if (isnullstartblock(left.br_startblock)) | |
2841 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 2842 | } |
1da177e4 | 2843 | |
9e5987a7 DC |
2844 | /* |
2845 | * Check and set flags if the current (right) segment exists. | |
2846 | * If it doesn't exist, we're converting the hole at end-of-file. | |
2847 | */ | |
2848 | if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { | |
2849 | state |= BMAP_RIGHT_VALID; | |
2850 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right); | |
1da177e4 | 2851 | |
9e5987a7 DC |
2852 | if (isnullstartblock(right.br_startblock)) |
2853 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 2854 | } |
9e5987a7 | 2855 | |
1da177e4 | 2856 | /* |
9e5987a7 DC |
2857 | * Set contiguity flags on the left and right neighbors. |
2858 | * Don't let extents get too large, even if the pieces are contiguous. | |
1da177e4 | 2859 | */ |
9e5987a7 DC |
2860 | if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) && |
2861 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
2862 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2863 | state |= BMAP_LEFT_CONTIG; | |
2864 | ||
2865 | if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) && | |
2866 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
2867 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
2868 | (!(state & BMAP_LEFT_CONTIG) || | |
2869 | (left.br_blockcount + new->br_blockcount + | |
2870 | right.br_blockcount <= MAXEXTLEN))) | |
2871 | state |= BMAP_RIGHT_CONTIG; | |
cc09c0dc DC |
2872 | |
2873 | /* | |
9e5987a7 | 2874 | * Switch out based on the contiguity flags. |
cc09c0dc | 2875 | */ |
9e5987a7 DC |
2876 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { |
2877 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2878 | /* | |
2879 | * New allocation is contiguous with delayed allocations | |
2880 | * on the left and on the right. | |
2881 | * Merge all three into a single extent record. | |
2882 | */ | |
2883 | --*idx; | |
2884 | temp = left.br_blockcount + new->br_blockcount + | |
2885 | right.br_blockcount; | |
cc09c0dc | 2886 | |
9e5987a7 DC |
2887 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2888 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); | |
2889 | oldlen = startblockval(left.br_startblock) + | |
2890 | startblockval(new->br_startblock) + | |
2891 | startblockval(right.br_startblock); | |
2892 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2893 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), | |
2894 | nullstartblock((int)newlen)); | |
2895 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2896 | |
9e5987a7 DC |
2897 | xfs_iext_remove(ip, *idx + 1, 1, state); |
2898 | break; | |
1da177e4 | 2899 | |
9e5987a7 DC |
2900 | case BMAP_LEFT_CONTIG: |
2901 | /* | |
2902 | * New allocation is contiguous with a delayed allocation | |
2903 | * on the left. | |
2904 | * Merge the new allocation with the left neighbor. | |
2905 | */ | |
2906 | --*idx; | |
2907 | temp = left.br_blockcount + new->br_blockcount; | |
1da177e4 | 2908 | |
9e5987a7 DC |
2909 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2910 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); | |
2911 | oldlen = startblockval(left.br_startblock) + | |
2912 | startblockval(new->br_startblock); | |
2913 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2914 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), | |
2915 | nullstartblock((int)newlen)); | |
2916 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2917 | break; | |
1da177e4 | 2918 | |
9e5987a7 DC |
2919 | case BMAP_RIGHT_CONTIG: |
2920 | /* | |
2921 | * New allocation is contiguous with a delayed allocation | |
2922 | * on the right. | |
2923 | * Merge the new allocation with the right neighbor. | |
2924 | */ | |
2925 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2926 | temp = new->br_blockcount + right.br_blockcount; | |
2927 | oldlen = startblockval(new->br_startblock) + | |
2928 | startblockval(right.br_startblock); | |
2929 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2930 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), | |
2931 | new->br_startoff, | |
2932 | nullstartblock((int)newlen), temp, right.br_state); | |
2933 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2934 | break; | |
2935 | ||
2936 | case 0: | |
2937 | /* | |
2938 | * New allocation is not contiguous with another | |
2939 | * delayed allocation. | |
2940 | * Insert a new entry. | |
2941 | */ | |
2942 | oldlen = newlen = 0; | |
2943 | xfs_iext_insert(ip, *idx, 1, new, state); | |
2944 | break; | |
1da177e4 | 2945 | } |
9e5987a7 DC |
2946 | if (oldlen != newlen) { |
2947 | ASSERT(oldlen > newlen); | |
2948 | xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, | |
2949 | (int64_t)(oldlen - newlen), 0); | |
1da177e4 | 2950 | /* |
9e5987a7 | 2951 | * Nothing to do for disk quota accounting here. |
1da177e4 | 2952 | */ |
1da177e4 | 2953 | } |
1da177e4 LT |
2954 | } |
2955 | ||
2956 | /* | |
9e5987a7 | 2957 | * Convert a hole to a real allocation. |
1da177e4 | 2958 | */ |
9e5987a7 DC |
2959 | STATIC int /* error */ |
2960 | xfs_bmap_add_extent_hole_real( | |
2961 | struct xfs_bmalloca *bma, | |
2962 | int whichfork) | |
27a3f8f2 | 2963 | { |
9e5987a7 DC |
2964 | struct xfs_bmbt_irec *new = &bma->got; |
2965 | int error; /* error return value */ | |
2966 | int i; /* temp state */ | |
2967 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
2968 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ | |
2969 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
2970 | int rval=0; /* return value (logging flags) */ | |
2971 | int state; /* state bits, accessed thru macros */ | |
27a3f8f2 | 2972 | |
9e5987a7 | 2973 | ifp = XFS_IFORK_PTR(bma->ip, whichfork); |
27a3f8f2 | 2974 | |
9e5987a7 DC |
2975 | ASSERT(bma->idx >= 0); |
2976 | ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); | |
2977 | ASSERT(!isnullstartblock(new->br_startblock)); | |
2978 | ASSERT(!bma->cur || | |
2979 | !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); | |
27a3f8f2 | 2980 | |
9e5987a7 | 2981 | XFS_STATS_INC(xs_add_exlist); |
27a3f8f2 | 2982 | |
9e5987a7 DC |
2983 | state = 0; |
2984 | if (whichfork == XFS_ATTR_FORK) | |
2985 | state |= BMAP_ATTRFORK; | |
27a3f8f2 | 2986 | |
9e5987a7 DC |
2987 | /* |
2988 | * Check and set flags if this segment has a left neighbor. | |
2989 | */ | |
2990 | if (bma->idx > 0) { | |
2991 | state |= BMAP_LEFT_VALID; | |
2992 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &left); | |
2993 | if (isnullstartblock(left.br_startblock)) | |
2994 | state |= BMAP_LEFT_DELAY; | |
2995 | } | |
27a3f8f2 CH |
2996 | |
2997 | /* | |
9e5987a7 DC |
2998 | * Check and set flags if this segment has a current value. |
2999 | * Not true if we're inserting into the "hole" at eof. | |
27a3f8f2 | 3000 | */ |
9e5987a7 DC |
3001 | if (bma->idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { |
3002 | state |= BMAP_RIGHT_VALID; | |
3003 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &right); | |
3004 | if (isnullstartblock(right.br_startblock)) | |
3005 | state |= BMAP_RIGHT_DELAY; | |
3006 | } | |
27a3f8f2 | 3007 | |
9e5987a7 DC |
3008 | /* |
3009 | * We're inserting a real allocation between "left" and "right". | |
3010 | * Set the contiguity flags. Don't let extents get too large. | |
3011 | */ | |
3012 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
3013 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
3014 | left.br_startblock + left.br_blockcount == new->br_startblock && | |
3015 | left.br_state == new->br_state && | |
3016 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
3017 | state |= BMAP_LEFT_CONTIG; | |
27a3f8f2 | 3018 | |
9e5987a7 DC |
3019 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && |
3020 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
3021 | new->br_startblock + new->br_blockcount == right.br_startblock && | |
3022 | new->br_state == right.br_state && | |
3023 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
3024 | (!(state & BMAP_LEFT_CONTIG) || | |
3025 | left.br_blockcount + new->br_blockcount + | |
3026 | right.br_blockcount <= MAXEXTLEN)) | |
3027 | state |= BMAP_RIGHT_CONTIG; | |
27a3f8f2 | 3028 | |
9e5987a7 DC |
3029 | error = 0; |
3030 | /* | |
3031 | * Select which case we're in here, and implement it. | |
3032 | */ | |
3033 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { | |
3034 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
3035 | /* | |
3036 | * New allocation is contiguous with real allocations on the | |
3037 | * left and on the right. | |
3038 | * Merge all three into a single extent record. | |
3039 | */ | |
3040 | --bma->idx; | |
3041 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3042 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
3043 | left.br_blockcount + new->br_blockcount + | |
3044 | right.br_blockcount); | |
3045 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
27a3f8f2 | 3046 | |
9e5987a7 | 3047 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); |
27a3f8f2 | 3048 | |
9e5987a7 DC |
3049 | XFS_IFORK_NEXT_SET(bma->ip, whichfork, |
3050 | XFS_IFORK_NEXTENTS(bma->ip, whichfork) - 1); | |
3051 | if (bma->cur == NULL) { | |
3052 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
3053 | } else { | |
3054 | rval = XFS_ILOG_CORE; | |
3055 | error = xfs_bmbt_lookup_eq(bma->cur, right.br_startoff, | |
3056 | right.br_startblock, right.br_blockcount, | |
3057 | &i); | |
3058 | if (error) | |
3059 | goto done; | |
3060 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
3061 | error = xfs_btree_delete(bma->cur, &i); | |
3062 | if (error) | |
3063 | goto done; | |
3064 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
3065 | error = xfs_btree_decrement(bma->cur, 0, &i); | |
3066 | if (error) | |
3067 | goto done; | |
3068 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
3069 | error = xfs_bmbt_update(bma->cur, left.br_startoff, | |
3070 | left.br_startblock, | |
3071 | left.br_blockcount + | |
3072 | new->br_blockcount + | |
3073 | right.br_blockcount, | |
3074 | left.br_state); | |
3075 | if (error) | |
3076 | goto done; | |
3077 | } | |
3078 | break; | |
27a3f8f2 | 3079 | |
9e5987a7 DC |
3080 | case BMAP_LEFT_CONTIG: |
3081 | /* | |
3082 | * New allocation is contiguous with a real allocation | |
3083 | * on the left. | |
3084 | * Merge the new allocation with the left neighbor. | |
3085 | */ | |
3086 | --bma->idx; | |
3087 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3088 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
3089 | left.br_blockcount + new->br_blockcount); | |
3090 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1da177e4 | 3091 | |
9e5987a7 DC |
3092 | if (bma->cur == NULL) { |
3093 | rval = xfs_ilog_fext(whichfork); | |
3094 | } else { | |
3095 | rval = 0; | |
3096 | error = xfs_bmbt_lookup_eq(bma->cur, left.br_startoff, | |
3097 | left.br_startblock, left.br_blockcount, | |
3098 | &i); | |
3099 | if (error) | |
3100 | goto done; | |
3101 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
3102 | error = xfs_bmbt_update(bma->cur, left.br_startoff, | |
3103 | left.br_startblock, | |
3104 | left.br_blockcount + | |
3105 | new->br_blockcount, | |
3106 | left.br_state); | |
3107 | if (error) | |
3108 | goto done; | |
3109 | } | |
3110 | break; | |
27a3f8f2 | 3111 | |
9e5987a7 DC |
3112 | case BMAP_RIGHT_CONTIG: |
3113 | /* | |
3114 | * New allocation is contiguous with a real allocation | |
3115 | * on the right. | |
3116 | * Merge the new allocation with the right neighbor. | |
3117 | */ | |
3118 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3119 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx), | |
3120 | new->br_startoff, new->br_startblock, | |
3121 | new->br_blockcount + right.br_blockcount, | |
3122 | right.br_state); | |
3123 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
27a3f8f2 | 3124 | |
9e5987a7 DC |
3125 | if (bma->cur == NULL) { |
3126 | rval = xfs_ilog_fext(whichfork); | |
3127 | } else { | |
3128 | rval = 0; | |
3129 | error = xfs_bmbt_lookup_eq(bma->cur, | |
3130 | right.br_startoff, | |
3131 | right.br_startblock, | |
3132 | right.br_blockcount, &i); | |
3133 | if (error) | |
3134 | goto done; | |
3135 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
3136 | error = xfs_bmbt_update(bma->cur, new->br_startoff, | |
3137 | new->br_startblock, | |
3138 | new->br_blockcount + | |
3139 | right.br_blockcount, | |
3140 | right.br_state); | |
3141 | if (error) | |
3142 | goto done; | |
3143 | } | |
3144 | break; | |
3145 | ||
3146 | case 0: | |
3147 | /* | |
3148 | * New allocation is not contiguous with another | |
3149 | * real allocation. | |
3150 | * Insert a new entry. | |
3151 | */ | |
3152 | xfs_iext_insert(bma->ip, bma->idx, 1, new, state); | |
3153 | XFS_IFORK_NEXT_SET(bma->ip, whichfork, | |
3154 | XFS_IFORK_NEXTENTS(bma->ip, whichfork) + 1); | |
3155 | if (bma->cur == NULL) { | |
3156 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
3157 | } else { | |
3158 | rval = XFS_ILOG_CORE; | |
3159 | error = xfs_bmbt_lookup_eq(bma->cur, | |
3160 | new->br_startoff, | |
3161 | new->br_startblock, | |
3162 | new->br_blockcount, &i); | |
3163 | if (error) | |
3164 | goto done; | |
3165 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); | |
3166 | bma->cur->bc_rec.b.br_state = new->br_state; | |
3167 | error = xfs_btree_insert(bma->cur, &i); | |
3168 | if (error) | |
3169 | goto done; | |
3170 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
3171 | } | |
3172 | break; | |
3173 | } | |
3174 | ||
3175 | /* convert to a btree if necessary */ | |
3176 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { | |
3177 | int tmp_logflags; /* partial log flag return val */ | |
3178 | ||
3179 | ASSERT(bma->cur == NULL); | |
3180 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
3181 | bma->firstblock, bma->flist, &bma->cur, | |
3182 | 0, &tmp_logflags, whichfork); | |
3183 | bma->logflags |= tmp_logflags; | |
3184 | if (error) | |
3185 | goto done; | |
3186 | } | |
3187 | ||
3188 | /* clear out the allocated field, done with it now in any case. */ | |
3189 | if (bma->cur) | |
3190 | bma->cur->bc_private.b.allocated = 0; | |
3191 | ||
3192 | xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); | |
3193 | done: | |
3194 | bma->logflags |= rval; | |
3195 | return error; | |
1da177e4 LT |
3196 | } |
3197 | ||
3198 | /* | |
9e5987a7 | 3199 | * Functions used in the extent read, allocate and remove paths |
1da177e4 | 3200 | */ |
1da177e4 | 3201 | |
9e5987a7 DC |
3202 | /* |
3203 | * Adjust the size of the new extent based on di_extsize and rt extsize. | |
3204 | */ | |
68988114 | 3205 | int |
9e5987a7 DC |
3206 | xfs_bmap_extsize_align( |
3207 | xfs_mount_t *mp, | |
3208 | xfs_bmbt_irec_t *gotp, /* next extent pointer */ | |
3209 | xfs_bmbt_irec_t *prevp, /* previous extent pointer */ | |
3210 | xfs_extlen_t extsz, /* align to this extent size */ | |
3211 | int rt, /* is this a realtime inode? */ | |
3212 | int eof, /* is extent at end-of-file? */ | |
3213 | int delay, /* creating delalloc extent? */ | |
3214 | int convert, /* overwriting unwritten extent? */ | |
3215 | xfs_fileoff_t *offp, /* in/out: aligned offset */ | |
3216 | xfs_extlen_t *lenp) /* in/out: aligned length */ | |
4e8938fe | 3217 | { |
9e5987a7 DC |
3218 | xfs_fileoff_t orig_off; /* original offset */ |
3219 | xfs_extlen_t orig_alen; /* original length */ | |
3220 | xfs_fileoff_t orig_end; /* original off+len */ | |
3221 | xfs_fileoff_t nexto; /* next file offset */ | |
3222 | xfs_fileoff_t prevo; /* previous file offset */ | |
3223 | xfs_fileoff_t align_off; /* temp for offset */ | |
3224 | xfs_extlen_t align_alen; /* temp for length */ | |
3225 | xfs_extlen_t temp; /* temp for calculations */ | |
4e8938fe | 3226 | |
9e5987a7 | 3227 | if (convert) |
4e8938fe | 3228 | return 0; |
4e8938fe | 3229 | |
9e5987a7 DC |
3230 | orig_off = align_off = *offp; |
3231 | orig_alen = align_alen = *lenp; | |
3232 | orig_end = orig_off + orig_alen; | |
1da177e4 | 3233 | |
1da177e4 | 3234 | /* |
9e5987a7 DC |
3235 | * If this request overlaps an existing extent, then don't |
3236 | * attempt to perform any additional alignment. | |
1da177e4 | 3237 | */ |
9e5987a7 DC |
3238 | if (!delay && !eof && |
3239 | (orig_off >= gotp->br_startoff) && | |
3240 | (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { | |
3241 | return 0; | |
3242 | } | |
3243 | ||
1da177e4 | 3244 | /* |
9e5987a7 DC |
3245 | * If the file offset is unaligned vs. the extent size |
3246 | * we need to align it. This will be possible unless | |
3247 | * the file was previously written with a kernel that didn't | |
3248 | * perform this alignment, or if a truncate shot us in the | |
3249 | * foot. | |
1da177e4 | 3250 | */ |
9e5987a7 DC |
3251 | temp = do_mod(orig_off, extsz); |
3252 | if (temp) { | |
3253 | align_alen += temp; | |
3254 | align_off -= temp; | |
1da177e4 LT |
3255 | } |
3256 | /* | |
9e5987a7 | 3257 | * Same adjustment for the end of the requested area. |
1da177e4 | 3258 | */ |
9e5987a7 DC |
3259 | if ((temp = (align_alen % extsz))) { |
3260 | align_alen += extsz - temp; | |
3261 | } | |
1da177e4 | 3262 | /* |
9e5987a7 DC |
3263 | * If the previous block overlaps with this proposed allocation |
3264 | * then move the start forward without adjusting the length. | |
1da177e4 | 3265 | */ |
9e5987a7 DC |
3266 | if (prevp->br_startoff != NULLFILEOFF) { |
3267 | if (prevp->br_startblock == HOLESTARTBLOCK) | |
3268 | prevo = prevp->br_startoff; | |
3269 | else | |
3270 | prevo = prevp->br_startoff + prevp->br_blockcount; | |
3271 | } else | |
3272 | prevo = 0; | |
3273 | if (align_off != orig_off && align_off < prevo) | |
3274 | align_off = prevo; | |
3275 | /* | |
3276 | * If the next block overlaps with this proposed allocation | |
3277 | * then move the start back without adjusting the length, | |
3278 | * but not before offset 0. | |
3279 | * This may of course make the start overlap previous block, | |
3280 | * and if we hit the offset 0 limit then the next block | |
3281 | * can still overlap too. | |
3282 | */ | |
3283 | if (!eof && gotp->br_startoff != NULLFILEOFF) { | |
3284 | if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || | |
3285 | (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) | |
3286 | nexto = gotp->br_startoff + gotp->br_blockcount; | |
3287 | else | |
3288 | nexto = gotp->br_startoff; | |
3289 | } else | |
3290 | nexto = NULLFILEOFF; | |
3291 | if (!eof && | |
3292 | align_off + align_alen != orig_end && | |
3293 | align_off + align_alen > nexto) | |
3294 | align_off = nexto > align_alen ? nexto - align_alen : 0; | |
3295 | /* | |
3296 | * If we're now overlapping the next or previous extent that | |
3297 | * means we can't fit an extsz piece in this hole. Just move | |
3298 | * the start forward to the first valid spot and set | |
3299 | * the length so we hit the end. | |
3300 | */ | |
3301 | if (align_off != orig_off && align_off < prevo) | |
3302 | align_off = prevo; | |
3303 | if (align_off + align_alen != orig_end && | |
3304 | align_off + align_alen > nexto && | |
3305 | nexto != NULLFILEOFF) { | |
3306 | ASSERT(nexto > prevo); | |
3307 | align_alen = nexto - align_off; | |
3308 | } | |
1da177e4 | 3309 | |
9e5987a7 DC |
3310 | /* |
3311 | * If realtime, and the result isn't a multiple of the realtime | |
3312 | * extent size we need to remove blocks until it is. | |
3313 | */ | |
3314 | if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { | |
1da177e4 | 3315 | /* |
9e5987a7 DC |
3316 | * We're not covering the original request, or |
3317 | * we won't be able to once we fix the length. | |
1da177e4 | 3318 | */ |
9e5987a7 DC |
3319 | if (orig_off < align_off || |
3320 | orig_end > align_off + align_alen || | |
3321 | align_alen - temp < orig_alen) | |
2451337d | 3322 | return -EINVAL; |
1da177e4 | 3323 | /* |
9e5987a7 | 3324 | * Try to fix it by moving the start up. |
1da177e4 | 3325 | */ |
9e5987a7 DC |
3326 | if (align_off + temp <= orig_off) { |
3327 | align_alen -= temp; | |
3328 | align_off += temp; | |
1da177e4 | 3329 | } |
9e5987a7 DC |
3330 | /* |
3331 | * Try to fix it by moving the end in. | |
3332 | */ | |
3333 | else if (align_off + align_alen - temp >= orig_end) | |
3334 | align_alen -= temp; | |
3335 | /* | |
3336 | * Set the start to the minimum then trim the length. | |
3337 | */ | |
3338 | else { | |
3339 | align_alen -= orig_off - align_off; | |
3340 | align_off = orig_off; | |
3341 | align_alen -= align_alen % mp->m_sb.sb_rextsize; | |
1da177e4 | 3342 | } |
1da177e4 | 3343 | /* |
9e5987a7 | 3344 | * Result doesn't cover the request, fail it. |
1da177e4 | 3345 | */ |
9e5987a7 | 3346 | if (orig_off < align_off || orig_end > align_off + align_alen) |
2451337d | 3347 | return -EINVAL; |
9e5987a7 DC |
3348 | } else { |
3349 | ASSERT(orig_off >= align_off); | |
3350 | ASSERT(orig_end <= align_off + align_alen); | |
1da177e4 | 3351 | } |
1da177e4 | 3352 | |
0b1b213f | 3353 | #ifdef DEBUG |
9e5987a7 DC |
3354 | if (!eof && gotp->br_startoff != NULLFILEOFF) |
3355 | ASSERT(align_off + align_alen <= gotp->br_startoff); | |
3356 | if (prevp->br_startoff != NULLFILEOFF) | |
3357 | ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); | |
3358 | #endif | |
1da177e4 | 3359 | |
9e5987a7 DC |
3360 | *lenp = align_alen; |
3361 | *offp = align_off; | |
3362 | return 0; | |
1da177e4 | 3363 | } |
1da177e4 | 3364 | |
9e5987a7 DC |
3365 | #define XFS_ALLOC_GAP_UNITS 4 |
3366 | ||
68988114 | 3367 | void |
9e5987a7 | 3368 | xfs_bmap_adjacent( |
68988114 | 3369 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
1da177e4 | 3370 | { |
9e5987a7 DC |
3371 | xfs_fsblock_t adjust; /* adjustment to block numbers */ |
3372 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ | |
3373 | xfs_mount_t *mp; /* mount point structure */ | |
3374 | int nullfb; /* true if ap->firstblock isn't set */ | |
3375 | int rt; /* true if inode is realtime */ | |
1da177e4 | 3376 | |
9e5987a7 DC |
3377 | #define ISVALID(x,y) \ |
3378 | (rt ? \ | |
3379 | (x) < mp->m_sb.sb_rblocks : \ | |
3380 | XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ | |
3381 | XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ | |
3382 | XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) | |
1da177e4 | 3383 | |
9e5987a7 DC |
3384 | mp = ap->ip->i_mount; |
3385 | nullfb = *ap->firstblock == NULLFSBLOCK; | |
3386 | rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata; | |
3387 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); | |
3388 | /* | |
3389 | * If allocating at eof, and there's a previous real block, | |
3390 | * try to use its last block as our starting point. | |
3391 | */ | |
3392 | if (ap->eof && ap->prev.br_startoff != NULLFILEOFF && | |
3393 | !isnullstartblock(ap->prev.br_startblock) && | |
3394 | ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount, | |
3395 | ap->prev.br_startblock)) { | |
3396 | ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount; | |
3397 | /* | |
3398 | * Adjust for the gap between prevp and us. | |
3399 | */ | |
3400 | adjust = ap->offset - | |
3401 | (ap->prev.br_startoff + ap->prev.br_blockcount); | |
3402 | if (adjust && | |
3403 | ISVALID(ap->blkno + adjust, ap->prev.br_startblock)) | |
3404 | ap->blkno += adjust; | |
3405 | } | |
3406 | /* | |
3407 | * If not at eof, then compare the two neighbor blocks. | |
3408 | * Figure out whether either one gives us a good starting point, | |
3409 | * and pick the better one. | |
3410 | */ | |
3411 | else if (!ap->eof) { | |
3412 | xfs_fsblock_t gotbno; /* right side block number */ | |
3413 | xfs_fsblock_t gotdiff=0; /* right side difference */ | |
3414 | xfs_fsblock_t prevbno; /* left side block number */ | |
3415 | xfs_fsblock_t prevdiff=0; /* left side difference */ | |
3416 | ||
3417 | /* | |
3418 | * If there's a previous (left) block, select a requested | |
3419 | * start block based on it. | |
3420 | */ | |
3421 | if (ap->prev.br_startoff != NULLFILEOFF && | |
3422 | !isnullstartblock(ap->prev.br_startblock) && | |
3423 | (prevbno = ap->prev.br_startblock + | |
3424 | ap->prev.br_blockcount) && | |
3425 | ISVALID(prevbno, ap->prev.br_startblock)) { | |
3426 | /* | |
3427 | * Calculate gap to end of previous block. | |
3428 | */ | |
3429 | adjust = prevdiff = ap->offset - | |
3430 | (ap->prev.br_startoff + | |
3431 | ap->prev.br_blockcount); | |
3432 | /* | |
3433 | * Figure the startblock based on the previous block's | |
3434 | * end and the gap size. | |
3435 | * Heuristic! | |
3436 | * If the gap is large relative to the piece we're | |
3437 | * allocating, or using it gives us an invalid block | |
3438 | * number, then just use the end of the previous block. | |
3439 | */ | |
3440 | if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length && | |
3441 | ISVALID(prevbno + prevdiff, | |
3442 | ap->prev.br_startblock)) | |
3443 | prevbno += adjust; | |
3444 | else | |
3445 | prevdiff += adjust; | |
3446 | /* | |
3447 | * If the firstblock forbids it, can't use it, | |
3448 | * must use default. | |
3449 | */ | |
3450 | if (!rt && !nullfb && | |
3451 | XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) | |
3452 | prevbno = NULLFSBLOCK; | |
1da177e4 | 3453 | } |
9e5987a7 DC |
3454 | /* |
3455 | * No previous block or can't follow it, just default. | |
3456 | */ | |
3457 | else | |
3458 | prevbno = NULLFSBLOCK; | |
3459 | /* | |
3460 | * If there's a following (right) block, select a requested | |
3461 | * start block based on it. | |
3462 | */ | |
3463 | if (!isnullstartblock(ap->got.br_startblock)) { | |
3464 | /* | |
3465 | * Calculate gap to start of next block. | |
3466 | */ | |
3467 | adjust = gotdiff = ap->got.br_startoff - ap->offset; | |
3468 | /* | |
3469 | * Figure the startblock based on the next block's | |
3470 | * start and the gap size. | |
3471 | */ | |
3472 | gotbno = ap->got.br_startblock; | |
3473 | /* | |
3474 | * Heuristic! | |
3475 | * If the gap is large relative to the piece we're | |
3476 | * allocating, or using it gives us an invalid block | |
3477 | * number, then just use the start of the next block | |
3478 | * offset by our length. | |
3479 | */ | |
3480 | if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length && | |
3481 | ISVALID(gotbno - gotdiff, gotbno)) | |
3482 | gotbno -= adjust; | |
3483 | else if (ISVALID(gotbno - ap->length, gotbno)) { | |
3484 | gotbno -= ap->length; | |
3485 | gotdiff += adjust - ap->length; | |
3486 | } else | |
3487 | gotdiff += adjust; | |
3488 | /* | |
3489 | * If the firstblock forbids it, can't use it, | |
3490 | * must use default. | |
3491 | */ | |
3492 | if (!rt && !nullfb && | |
3493 | XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) | |
3494 | gotbno = NULLFSBLOCK; | |
3495 | } | |
3496 | /* | |
3497 | * No next block, just default. | |
3498 | */ | |
3499 | else | |
3500 | gotbno = NULLFSBLOCK; | |
3501 | /* | |
3502 | * If both valid, pick the better one, else the only good | |
3503 | * one, else ap->blkno is already set (to 0 or the inode block). | |
3504 | */ | |
3505 | if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) | |
3506 | ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno; | |
3507 | else if (prevbno != NULLFSBLOCK) | |
3508 | ap->blkno = prevbno; | |
3509 | else if (gotbno != NULLFSBLOCK) | |
3510 | ap->blkno = gotbno; | |
1da177e4 | 3511 | } |
9e5987a7 | 3512 | #undef ISVALID |
1da177e4 | 3513 | } |
1da177e4 | 3514 | |
c977eb10 CH |
3515 | static int |
3516 | xfs_bmap_longest_free_extent( | |
3517 | struct xfs_trans *tp, | |
3518 | xfs_agnumber_t ag, | |
3519 | xfs_extlen_t *blen, | |
3520 | int *notinit) | |
3521 | { | |
3522 | struct xfs_mount *mp = tp->t_mountp; | |
3523 | struct xfs_perag *pag; | |
3524 | xfs_extlen_t longest; | |
3525 | int error = 0; | |
3526 | ||
3527 | pag = xfs_perag_get(mp, ag); | |
3528 | if (!pag->pagf_init) { | |
3529 | error = xfs_alloc_pagf_init(mp, tp, ag, XFS_ALLOC_FLAG_TRYLOCK); | |
3530 | if (error) | |
3531 | goto out; | |
3532 | ||
3533 | if (!pag->pagf_init) { | |
3534 | *notinit = 1; | |
3535 | goto out; | |
3536 | } | |
3537 | } | |
3538 | ||
3539 | longest = xfs_alloc_longest_free_extent(mp, pag); | |
3540 | if (*blen < longest) | |
3541 | *blen = longest; | |
3542 | ||
3543 | out: | |
3544 | xfs_perag_put(pag); | |
3545 | return error; | |
3546 | } | |
3547 | ||
3548 | static void | |
3549 | xfs_bmap_select_minlen( | |
3550 | struct xfs_bmalloca *ap, | |
3551 | struct xfs_alloc_arg *args, | |
3552 | xfs_extlen_t *blen, | |
3553 | int notinit) | |
3554 | { | |
3555 | if (notinit || *blen < ap->minlen) { | |
3556 | /* | |
3557 | * Since we did a BUF_TRYLOCK above, it is possible that | |
3558 | * there is space for this request. | |
3559 | */ | |
3560 | args->minlen = ap->minlen; | |
3561 | } else if (*blen < args->maxlen) { | |
3562 | /* | |
3563 | * If the best seen length is less than the request length, | |
3564 | * use the best as the minimum. | |
3565 | */ | |
3566 | args->minlen = *blen; | |
3567 | } else { | |
3568 | /* | |
3569 | * Otherwise we've seen an extent as big as maxlen, use that | |
3570 | * as the minimum. | |
3571 | */ | |
3572 | args->minlen = args->maxlen; | |
3573 | } | |
3574 | } | |
3575 | ||
b64dfe4e | 3576 | STATIC int |
9e5987a7 DC |
3577 | xfs_bmap_btalloc_nullfb( |
3578 | struct xfs_bmalloca *ap, | |
3579 | struct xfs_alloc_arg *args, | |
3580 | xfs_extlen_t *blen) | |
b64dfe4e | 3581 | { |
9e5987a7 | 3582 | struct xfs_mount *mp = ap->ip->i_mount; |
9e5987a7 DC |
3583 | xfs_agnumber_t ag, startag; |
3584 | int notinit = 0; | |
b64dfe4e CH |
3585 | int error; |
3586 | ||
c977eb10 | 3587 | args->type = XFS_ALLOCTYPE_START_BNO; |
9e5987a7 | 3588 | args->total = ap->total; |
b64dfe4e | 3589 | |
9e5987a7 DC |
3590 | startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); |
3591 | if (startag == NULLAGNUMBER) | |
3592 | startag = ag = 0; | |
b64dfe4e | 3593 | |
9e5987a7 | 3594 | while (*blen < args->maxlen) { |
c977eb10 CH |
3595 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, |
3596 | ¬init); | |
3597 | if (error) | |
3598 | return error; | |
b64dfe4e | 3599 | |
9e5987a7 DC |
3600 | if (++ag == mp->m_sb.sb_agcount) |
3601 | ag = 0; | |
3602 | if (ag == startag) | |
3603 | break; | |
9e5987a7 | 3604 | } |
b64dfe4e | 3605 | |
c977eb10 CH |
3606 | xfs_bmap_select_minlen(ap, args, blen, notinit); |
3607 | return 0; | |
3608 | } | |
3609 | ||
3610 | STATIC int | |
3611 | xfs_bmap_btalloc_filestreams( | |
3612 | struct xfs_bmalloca *ap, | |
3613 | struct xfs_alloc_arg *args, | |
3614 | xfs_extlen_t *blen) | |
3615 | { | |
3616 | struct xfs_mount *mp = ap->ip->i_mount; | |
3617 | xfs_agnumber_t ag; | |
3618 | int notinit = 0; | |
3619 | int error; | |
3620 | ||
3621 | args->type = XFS_ALLOCTYPE_NEAR_BNO; | |
3622 | args->total = ap->total; | |
3623 | ||
3624 | ag = XFS_FSB_TO_AGNO(mp, args->fsbno); | |
3625 | if (ag == NULLAGNUMBER) | |
3626 | ag = 0; | |
3627 | ||
3628 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, ¬init); | |
3629 | if (error) | |
3630 | return error; | |
3631 | ||
3632 | if (*blen < args->maxlen) { | |
3633 | error = xfs_filestream_new_ag(ap, &ag); | |
3634 | if (error) | |
3635 | return error; | |
3636 | ||
3637 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, | |
3638 | ¬init); | |
3639 | if (error) | |
3640 | return error; | |
3641 | ||
3642 | } | |
3643 | ||
3644 | xfs_bmap_select_minlen(ap, args, blen, notinit); | |
b64dfe4e CH |
3645 | |
3646 | /* | |
c977eb10 CH |
3647 | * Set the failure fallback case to look in the selected AG as stream |
3648 | * may have moved. | |
b64dfe4e | 3649 | */ |
c977eb10 | 3650 | ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0); |
b64dfe4e | 3651 | return 0; |
b64dfe4e CH |
3652 | } |
3653 | ||
9e5987a7 DC |
3654 | STATIC int |
3655 | xfs_bmap_btalloc( | |
68988114 | 3656 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
4403280a | 3657 | { |
9e5987a7 DC |
3658 | xfs_mount_t *mp; /* mount point structure */ |
3659 | xfs_alloctype_t atype = 0; /* type for allocation routines */ | |
3660 | xfs_extlen_t align; /* minimum allocation alignment */ | |
3661 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ | |
3662 | xfs_agnumber_t ag; | |
3663 | xfs_alloc_arg_t args; | |
3664 | xfs_extlen_t blen; | |
3665 | xfs_extlen_t nextminlen = 0; | |
3666 | int nullfb; /* true if ap->firstblock isn't set */ | |
3667 | int isaligned; | |
3668 | int tryagain; | |
3669 | int error; | |
33177f05 | 3670 | int stripe_align; |
4403280a | 3671 | |
9e5987a7 | 3672 | ASSERT(ap->length); |
4403280a | 3673 | |
9e5987a7 | 3674 | mp = ap->ip->i_mount; |
33177f05 DC |
3675 | |
3676 | /* stripe alignment for allocation is determined by mount parameters */ | |
3677 | stripe_align = 0; | |
3678 | if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) | |
3679 | stripe_align = mp->m_swidth; | |
3680 | else if (mp->m_dalign) | |
3681 | stripe_align = mp->m_dalign; | |
3682 | ||
9e5987a7 DC |
3683 | align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0; |
3684 | if (unlikely(align)) { | |
3685 | error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, | |
3686 | align, 0, ap->eof, 0, ap->conv, | |
3687 | &ap->offset, &ap->length); | |
3688 | ASSERT(!error); | |
3689 | ASSERT(ap->length); | |
4403280a | 3690 | } |
33177f05 DC |
3691 | |
3692 | ||
9e5987a7 DC |
3693 | nullfb = *ap->firstblock == NULLFSBLOCK; |
3694 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); | |
3695 | if (nullfb) { | |
3696 | if (ap->userdata && xfs_inode_is_filestream(ap->ip)) { | |
3697 | ag = xfs_filestream_lookup_ag(ap->ip); | |
3698 | ag = (ag != NULLAGNUMBER) ? ag : 0; | |
3699 | ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); | |
3700 | } else { | |
3701 | ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); | |
3702 | } | |
3703 | } else | |
3704 | ap->blkno = *ap->firstblock; | |
4403280a | 3705 | |
9e5987a7 | 3706 | xfs_bmap_adjacent(ap); |
4403280a | 3707 | |
9e5987a7 DC |
3708 | /* |
3709 | * If allowed, use ap->blkno; otherwise must use firstblock since | |
3710 | * it's in the right allocation group. | |
3711 | */ | |
3712 | if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) | |
3713 | ; | |
3714 | else | |
3715 | ap->blkno = *ap->firstblock; | |
3716 | /* | |
3717 | * Normal allocation, done through xfs_alloc_vextent. | |
3718 | */ | |
3719 | tryagain = isaligned = 0; | |
3720 | memset(&args, 0, sizeof(args)); | |
3721 | args.tp = ap->tp; | |
3722 | args.mp = mp; | |
3723 | args.fsbno = ap->blkno; | |
4403280a | 3724 | |
9e5987a7 DC |
3725 | /* Trim the allocation back to the maximum an AG can fit. */ |
3726 | args.maxlen = MIN(ap->length, XFS_ALLOC_AG_MAX_USABLE(mp)); | |
3727 | args.firstblock = *ap->firstblock; | |
3728 | blen = 0; | |
3729 | if (nullfb) { | |
c977eb10 CH |
3730 | /* |
3731 | * Search for an allocation group with a single extent large | |
3732 | * enough for the request. If one isn't found, then adjust | |
3733 | * the minimum allocation size to the largest space found. | |
3734 | */ | |
3735 | if (ap->userdata && xfs_inode_is_filestream(ap->ip)) | |
3736 | error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); | |
3737 | else | |
3738 | error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); | |
4403280a CH |
3739 | if (error) |
3740 | return error; | |
9e5987a7 DC |
3741 | } else if (ap->flist->xbf_low) { |
3742 | if (xfs_inode_is_filestream(ap->ip)) | |
3743 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
3744 | else | |
3745 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3746 | args.total = args.minlen = ap->minlen; | |
3747 | } else { | |
3748 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
3749 | args.total = ap->total; | |
3750 | args.minlen = ap->minlen; | |
4403280a | 3751 | } |
9e5987a7 DC |
3752 | /* apply extent size hints if obtained earlier */ |
3753 | if (unlikely(align)) { | |
3754 | args.prod = align; | |
3755 | if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod))) | |
3756 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
3757 | } else if (mp->m_sb.sb_blocksize >= PAGE_CACHE_SIZE) { | |
3758 | args.prod = 1; | |
3759 | args.mod = 0; | |
3760 | } else { | |
3761 | args.prod = PAGE_CACHE_SIZE >> mp->m_sb.sb_blocklog; | |
3762 | if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod)))) | |
3763 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
4403280a | 3764 | } |
7e47a4ef | 3765 | /* |
9e5987a7 DC |
3766 | * If we are not low on available data blocks, and the |
3767 | * underlying logical volume manager is a stripe, and | |
3768 | * the file offset is zero then try to allocate data | |
3769 | * blocks on stripe unit boundary. | |
3770 | * NOTE: ap->aeof is only set if the allocation length | |
3771 | * is >= the stripe unit and the allocation offset is | |
3772 | * at the end of file. | |
7e47a4ef | 3773 | */ |
9e5987a7 DC |
3774 | if (!ap->flist->xbf_low && ap->aeof) { |
3775 | if (!ap->offset) { | |
33177f05 | 3776 | args.alignment = stripe_align; |
9e5987a7 DC |
3777 | atype = args.type; |
3778 | isaligned = 1; | |
3779 | /* | |
3780 | * Adjust for alignment | |
3781 | */ | |
3782 | if (blen > args.alignment && blen <= args.maxlen) | |
3783 | args.minlen = blen - args.alignment; | |
3784 | args.minalignslop = 0; | |
3785 | } else { | |
3786 | /* | |
3787 | * First try an exact bno allocation. | |
3788 | * If it fails then do a near or start bno | |
3789 | * allocation with alignment turned on. | |
3790 | */ | |
3791 | atype = args.type; | |
3792 | tryagain = 1; | |
3793 | args.type = XFS_ALLOCTYPE_THIS_BNO; | |
3794 | args.alignment = 1; | |
3795 | /* | |
3796 | * Compute the minlen+alignment for the | |
3797 | * next case. Set slop so that the value | |
3798 | * of minlen+alignment+slop doesn't go up | |
3799 | * between the calls. | |
3800 | */ | |
33177f05 DC |
3801 | if (blen > stripe_align && blen <= args.maxlen) |
3802 | nextminlen = blen - stripe_align; | |
9e5987a7 DC |
3803 | else |
3804 | nextminlen = args.minlen; | |
33177f05 | 3805 | if (nextminlen + stripe_align > args.minlen + 1) |
9e5987a7 | 3806 | args.minalignslop = |
33177f05 | 3807 | nextminlen + stripe_align - |
9e5987a7 DC |
3808 | args.minlen - 1; |
3809 | else | |
3810 | args.minalignslop = 0; | |
7e47a4ef DC |
3811 | } |
3812 | } else { | |
9e5987a7 DC |
3813 | args.alignment = 1; |
3814 | args.minalignslop = 0; | |
7e47a4ef | 3815 | } |
9e5987a7 DC |
3816 | args.minleft = ap->minleft; |
3817 | args.wasdel = ap->wasdel; | |
3818 | args.isfl = 0; | |
3819 | args.userdata = ap->userdata; | |
3820 | if ((error = xfs_alloc_vextent(&args))) | |
3821 | return error; | |
3822 | if (tryagain && args.fsbno == NULLFSBLOCK) { | |
3823 | /* | |
3824 | * Exact allocation failed. Now try with alignment | |
3825 | * turned on. | |
3826 | */ | |
3827 | args.type = atype; | |
3828 | args.fsbno = ap->blkno; | |
33177f05 | 3829 | args.alignment = stripe_align; |
9e5987a7 DC |
3830 | args.minlen = nextminlen; |
3831 | args.minalignslop = 0; | |
3832 | isaligned = 1; | |
3833 | if ((error = xfs_alloc_vextent(&args))) | |
3834 | return error; | |
7e47a4ef | 3835 | } |
9e5987a7 DC |
3836 | if (isaligned && args.fsbno == NULLFSBLOCK) { |
3837 | /* | |
3838 | * allocation failed, so turn off alignment and | |
3839 | * try again. | |
3840 | */ | |
3841 | args.type = atype; | |
3842 | args.fsbno = ap->blkno; | |
3843 | args.alignment = 0; | |
3844 | if ((error = xfs_alloc_vextent(&args))) | |
7e47a4ef DC |
3845 | return error; |
3846 | } | |
9e5987a7 DC |
3847 | if (args.fsbno == NULLFSBLOCK && nullfb && |
3848 | args.minlen > ap->minlen) { | |
3849 | args.minlen = ap->minlen; | |
3850 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3851 | args.fsbno = ap->blkno; | |
3852 | if ((error = xfs_alloc_vextent(&args))) | |
3853 | return error; | |
7e47a4ef | 3854 | } |
9e5987a7 DC |
3855 | if (args.fsbno == NULLFSBLOCK && nullfb) { |
3856 | args.fsbno = 0; | |
3857 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
3858 | args.total = ap->minlen; | |
3859 | args.minleft = 0; | |
3860 | if ((error = xfs_alloc_vextent(&args))) | |
3861 | return error; | |
3862 | ap->flist->xbf_low = 1; | |
3863 | } | |
3864 | if (args.fsbno != NULLFSBLOCK) { | |
3865 | /* | |
3866 | * check the allocation happened at the same or higher AG than | |
3867 | * the first block that was allocated. | |
3868 | */ | |
3869 | ASSERT(*ap->firstblock == NULLFSBLOCK || | |
3870 | XFS_FSB_TO_AGNO(mp, *ap->firstblock) == | |
3871 | XFS_FSB_TO_AGNO(mp, args.fsbno) || | |
3872 | (ap->flist->xbf_low && | |
3873 | XFS_FSB_TO_AGNO(mp, *ap->firstblock) < | |
3874 | XFS_FSB_TO_AGNO(mp, args.fsbno))); | |
7e47a4ef | 3875 | |
9e5987a7 DC |
3876 | ap->blkno = args.fsbno; |
3877 | if (*ap->firstblock == NULLFSBLOCK) | |
3878 | *ap->firstblock = args.fsbno; | |
3879 | ASSERT(nullfb || fb_agno == args.agno || | |
3880 | (ap->flist->xbf_low && fb_agno < args.agno)); | |
3881 | ap->length = args.len; | |
3882 | ap->ip->i_d.di_nblocks += args.len; | |
3883 | xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); | |
3884 | if (ap->wasdel) | |
3885 | ap->ip->i_delayed_blks -= args.len; | |
3886 | /* | |
3887 | * Adjust the disk quota also. This was reserved | |
3888 | * earlier. | |
3889 | */ | |
3890 | xfs_trans_mod_dquot_byino(ap->tp, ap->ip, | |
3891 | ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : | |
3892 | XFS_TRANS_DQ_BCOUNT, | |
3893 | (long) args.len); | |
3894 | } else { | |
3895 | ap->blkno = NULLFSBLOCK; | |
3896 | ap->length = 0; | |
3897 | } | |
3898 | return 0; | |
3899 | } | |
7e47a4ef | 3900 | |
9e5987a7 DC |
3901 | /* |
3902 | * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. | |
3903 | * It figures out where to ask the underlying allocator to put the new extent. | |
3904 | */ | |
3905 | STATIC int | |
3906 | xfs_bmap_alloc( | |
68988114 | 3907 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
9e5987a7 DC |
3908 | { |
3909 | if (XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata) | |
3910 | return xfs_bmap_rtalloc(ap); | |
3911 | return xfs_bmap_btalloc(ap); | |
3912 | } | |
a5bd606b | 3913 | |
9e5987a7 DC |
3914 | /* |
3915 | * Trim the returned map to the required bounds | |
3916 | */ | |
3917 | STATIC void | |
3918 | xfs_bmapi_trim_map( | |
3919 | struct xfs_bmbt_irec *mval, | |
3920 | struct xfs_bmbt_irec *got, | |
3921 | xfs_fileoff_t *bno, | |
3922 | xfs_filblks_t len, | |
3923 | xfs_fileoff_t obno, | |
3924 | xfs_fileoff_t end, | |
3925 | int n, | |
3926 | int flags) | |
3927 | { | |
3928 | if ((flags & XFS_BMAPI_ENTIRE) || | |
3929 | got->br_startoff + got->br_blockcount <= obno) { | |
3930 | *mval = *got; | |
3931 | if (isnullstartblock(got->br_startblock)) | |
3932 | mval->br_startblock = DELAYSTARTBLOCK; | |
3933 | return; | |
3934 | } | |
7e47a4ef | 3935 | |
9e5987a7 DC |
3936 | if (obno > *bno) |
3937 | *bno = obno; | |
3938 | ASSERT((*bno >= obno) || (n == 0)); | |
3939 | ASSERT(*bno < end); | |
3940 | mval->br_startoff = *bno; | |
3941 | if (isnullstartblock(got->br_startblock)) | |
3942 | mval->br_startblock = DELAYSTARTBLOCK; | |
3943 | else | |
3944 | mval->br_startblock = got->br_startblock + | |
3945 | (*bno - got->br_startoff); | |
7e47a4ef | 3946 | /* |
9e5987a7 DC |
3947 | * Return the minimum of what we got and what we asked for for |
3948 | * the length. We can use the len variable here because it is | |
3949 | * modified below and we could have been there before coming | |
3950 | * here if the first part of the allocation didn't overlap what | |
3951 | * was asked for. | |
7e47a4ef | 3952 | */ |
9e5987a7 DC |
3953 | mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno, |
3954 | got->br_blockcount - (*bno - got->br_startoff)); | |
3955 | mval->br_state = got->br_state; | |
3956 | ASSERT(mval->br_blockcount <= len); | |
3957 | return; | |
7e47a4ef DC |
3958 | } |
3959 | ||
9e5987a7 DC |
3960 | /* |
3961 | * Update and validate the extent map to return | |
3962 | */ | |
3963 | STATIC void | |
3964 | xfs_bmapi_update_map( | |
3965 | struct xfs_bmbt_irec **map, | |
3966 | xfs_fileoff_t *bno, | |
3967 | xfs_filblks_t *len, | |
3968 | xfs_fileoff_t obno, | |
3969 | xfs_fileoff_t end, | |
3970 | int *n, | |
3971 | int flags) | |
e04426b9 | 3972 | { |
9e5987a7 | 3973 | xfs_bmbt_irec_t *mval = *map; |
e04426b9 | 3974 | |
9e5987a7 DC |
3975 | ASSERT((flags & XFS_BMAPI_ENTIRE) || |
3976 | ((mval->br_startoff + mval->br_blockcount) <= end)); | |
3977 | ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) || | |
3978 | (mval->br_startoff < obno)); | |
e04426b9 | 3979 | |
9e5987a7 DC |
3980 | *bno = mval->br_startoff + mval->br_blockcount; |
3981 | *len = end - *bno; | |
3982 | if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) { | |
3983 | /* update previous map with new information */ | |
3984 | ASSERT(mval->br_startblock == mval[-1].br_startblock); | |
3985 | ASSERT(mval->br_blockcount > mval[-1].br_blockcount); | |
3986 | ASSERT(mval->br_state == mval[-1].br_state); | |
3987 | mval[-1].br_blockcount = mval->br_blockcount; | |
3988 | mval[-1].br_state = mval->br_state; | |
3989 | } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK && | |
3990 | mval[-1].br_startblock != DELAYSTARTBLOCK && | |
3991 | mval[-1].br_startblock != HOLESTARTBLOCK && | |
3992 | mval->br_startblock == mval[-1].br_startblock + | |
3993 | mval[-1].br_blockcount && | |
3994 | ((flags & XFS_BMAPI_IGSTATE) || | |
3995 | mval[-1].br_state == mval->br_state)) { | |
3996 | ASSERT(mval->br_startoff == | |
3997 | mval[-1].br_startoff + mval[-1].br_blockcount); | |
3998 | mval[-1].br_blockcount += mval->br_blockcount; | |
3999 | } else if (*n > 0 && | |
4000 | mval->br_startblock == DELAYSTARTBLOCK && | |
4001 | mval[-1].br_startblock == DELAYSTARTBLOCK && | |
4002 | mval->br_startoff == | |
4003 | mval[-1].br_startoff + mval[-1].br_blockcount) { | |
4004 | mval[-1].br_blockcount += mval->br_blockcount; | |
4005 | mval[-1].br_state = mval->br_state; | |
4006 | } else if (!((*n == 0) && | |
4007 | ((mval->br_startoff + mval->br_blockcount) <= | |
4008 | obno))) { | |
4009 | mval++; | |
4010 | (*n)++; | |
4011 | } | |
4012 | *map = mval; | |
e04426b9 DC |
4013 | } |
4014 | ||
4015 | /* | |
9e5987a7 | 4016 | * Map file blocks to filesystem blocks without allocation. |
e04426b9 DC |
4017 | */ |
4018 | int | |
9e5987a7 DC |
4019 | xfs_bmapi_read( |
4020 | struct xfs_inode *ip, | |
4021 | xfs_fileoff_t bno, | |
b447fe5a | 4022 | xfs_filblks_t len, |
9e5987a7 DC |
4023 | struct xfs_bmbt_irec *mval, |
4024 | int *nmap, | |
c315c90b | 4025 | int flags) |
b447fe5a | 4026 | { |
9e5987a7 DC |
4027 | struct xfs_mount *mp = ip->i_mount; |
4028 | struct xfs_ifork *ifp; | |
4029 | struct xfs_bmbt_irec got; | |
4030 | struct xfs_bmbt_irec prev; | |
4031 | xfs_fileoff_t obno; | |
4032 | xfs_fileoff_t end; | |
4033 | xfs_extnum_t lastx; | |
4034 | int error; | |
4035 | int eof; | |
4036 | int n = 0; | |
b447fe5a DC |
4037 | int whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
4038 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
b447fe5a | 4039 | |
9e5987a7 DC |
4040 | ASSERT(*nmap >= 1); |
4041 | ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE| | |
4042 | XFS_BMAPI_IGSTATE))); | |
eef334e5 | 4043 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)); |
b447fe5a | 4044 | |
9e5987a7 DC |
4045 | if (unlikely(XFS_TEST_ERROR( |
4046 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
4047 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
4048 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
4049 | XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 4050 | return -EFSCORRUPTED; |
9e5987a7 | 4051 | } |
b447fe5a | 4052 | |
9e5987a7 | 4053 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4054 | return -EIO; |
9e5987a7 DC |
4055 | |
4056 | XFS_STATS_INC(xs_blk_mapr); | |
4057 | ||
4058 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4059 | ||
4060 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
4061 | error = xfs_iread_extents(NULL, ip, whichfork); | |
4062 | if (error) | |
4063 | return error; | |
b447fe5a | 4064 | } |
b447fe5a | 4065 | |
9e5987a7 DC |
4066 | xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, &prev); |
4067 | end = bno + len; | |
4068 | obno = bno; | |
b447fe5a | 4069 | |
9e5987a7 DC |
4070 | while (bno < end && n < *nmap) { |
4071 | /* Reading past eof, act as though there's a hole up to end. */ | |
4072 | if (eof) | |
4073 | got.br_startoff = end; | |
4074 | if (got.br_startoff > bno) { | |
4075 | /* Reading in a hole. */ | |
4076 | mval->br_startoff = bno; | |
4077 | mval->br_startblock = HOLESTARTBLOCK; | |
4078 | mval->br_blockcount = | |
4079 | XFS_FILBLKS_MIN(len, got.br_startoff - bno); | |
4080 | mval->br_state = XFS_EXT_NORM; | |
4081 | bno += mval->br_blockcount; | |
4082 | len -= mval->br_blockcount; | |
4083 | mval++; | |
4084 | n++; | |
4085 | continue; | |
4086 | } | |
b447fe5a | 4087 | |
9e5987a7 DC |
4088 | /* set up the extent map to return. */ |
4089 | xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); | |
4090 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); | |
4091 | ||
4092 | /* If we're done, stop now. */ | |
4093 | if (bno >= end || n >= *nmap) | |
4094 | break; | |
4095 | ||
4096 | /* Else go on to the next record. */ | |
4097 | if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) | |
4098 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got); | |
4099 | else | |
4100 | eof = 1; | |
4101 | } | |
4102 | *nmap = n; | |
b447fe5a DC |
4103 | return 0; |
4104 | } | |
4105 | ||
9e5987a7 DC |
4106 | STATIC int |
4107 | xfs_bmapi_reserve_delalloc( | |
4108 | struct xfs_inode *ip, | |
4109 | xfs_fileoff_t aoff, | |
4110 | xfs_filblks_t len, | |
4111 | struct xfs_bmbt_irec *got, | |
4112 | struct xfs_bmbt_irec *prev, | |
4113 | xfs_extnum_t *lastx, | |
4114 | int eof) | |
1da177e4 | 4115 | { |
c0dc7828 | 4116 | struct xfs_mount *mp = ip->i_mount; |
9e5987a7 DC |
4117 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
4118 | xfs_extlen_t alen; | |
4119 | xfs_extlen_t indlen; | |
4120 | char rt = XFS_IS_REALTIME_INODE(ip); | |
4121 | xfs_extlen_t extsz; | |
4122 | int error; | |
c0dc7828 | 4123 | |
9e5987a7 DC |
4124 | alen = XFS_FILBLKS_MIN(len, MAXEXTLEN); |
4125 | if (!eof) | |
4126 | alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff); | |
1da177e4 | 4127 | |
9e5987a7 DC |
4128 | /* Figure out the extent size, adjust alen */ |
4129 | extsz = xfs_get_extsz_hint(ip); | |
4130 | if (extsz) { | |
4131 | /* | |
4132 | * Make sure we don't exceed a single extent length when we | |
4133 | * align the extent by reducing length we are going to | |
4134 | * allocate by the maximum amount extent size aligment may | |
4135 | * require. | |
4136 | */ | |
4137 | alen = XFS_FILBLKS_MIN(len, MAXEXTLEN - (2 * extsz - 1)); | |
4138 | error = xfs_bmap_extsize_align(mp, got, prev, extsz, rt, eof, | |
4139 | 1, 0, &aoff, &alen); | |
4140 | ASSERT(!error); | |
4141 | } | |
4142 | ||
4143 | if (rt) | |
4144 | extsz = alen / mp->m_sb.sb_rextsize; | |
4145 | ||
4146 | /* | |
4147 | * Make a transaction-less quota reservation for delayed allocation | |
4148 | * blocks. This number gets adjusted later. We return if we haven't | |
4149 | * allocated blocks already inside this loop. | |
4150 | */ | |
4151 | error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0, | |
4152 | rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); | |
4153 | if (error) | |
4154 | return error; | |
4155 | ||
4156 | /* | |
4157 | * Split changing sb for alen and indlen since they could be coming | |
4158 | * from different places. | |
4159 | */ | |
4160 | indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen); | |
4161 | ASSERT(indlen > 0); | |
4162 | ||
4163 | if (rt) { | |
4164 | error = xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS, | |
4165 | -((int64_t)extsz), 0); | |
4166 | } else { | |
4167 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, | |
4168 | -((int64_t)alen), 0); | |
4169 | } | |
4170 | ||
4171 | if (error) | |
4172 | goto out_unreserve_quota; | |
4173 | ||
4174 | error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, | |
4175 | -((int64_t)indlen), 0); | |
4176 | if (error) | |
4177 | goto out_unreserve_blocks; | |
4178 | ||
4179 | ||
4180 | ip->i_delayed_blks += alen; | |
4181 | ||
4182 | got->br_startoff = aoff; | |
4183 | got->br_startblock = nullstartblock(indlen); | |
4184 | got->br_blockcount = alen; | |
4185 | got->br_state = XFS_EXT_NORM; | |
4186 | xfs_bmap_add_extent_hole_delay(ip, lastx, got); | |
4187 | ||
4188 | /* | |
4189 | * Update our extent pointer, given that xfs_bmap_add_extent_hole_delay | |
4190 | * might have merged it into one of the neighbouring ones. | |
4191 | */ | |
4192 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *lastx), got); | |
4193 | ||
4194 | ASSERT(got->br_startoff <= aoff); | |
4195 | ASSERT(got->br_startoff + got->br_blockcount >= aoff + alen); | |
4196 | ASSERT(isnullstartblock(got->br_startblock)); | |
4197 | ASSERT(got->br_state == XFS_EXT_NORM); | |
4198 | return 0; | |
4199 | ||
4200 | out_unreserve_blocks: | |
4201 | if (rt) | |
4202 | xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS, extsz, 0); | |
4203 | else | |
4204 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, alen, 0); | |
4205 | out_unreserve_quota: | |
4206 | if (XFS_IS_QUOTA_ON(mp)) | |
4207 | xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ? | |
4208 | XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); | |
4209 | return error; | |
4210 | } | |
4211 | ||
4212 | /* | |
4213 | * Map file blocks to filesystem blocks, adding delayed allocations as needed. | |
4214 | */ | |
4215 | int | |
4216 | xfs_bmapi_delay( | |
4217 | struct xfs_inode *ip, /* incore inode */ | |
4218 | xfs_fileoff_t bno, /* starting file offs. mapped */ | |
4219 | xfs_filblks_t len, /* length to map in file */ | |
4220 | struct xfs_bmbt_irec *mval, /* output: map values */ | |
4221 | int *nmap, /* i/o: mval size/count */ | |
4222 | int flags) /* XFS_BMAPI_... */ | |
4223 | { | |
4224 | struct xfs_mount *mp = ip->i_mount; | |
4225 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
4226 | struct xfs_bmbt_irec got; /* current file extent record */ | |
4227 | struct xfs_bmbt_irec prev; /* previous file extent record */ | |
4228 | xfs_fileoff_t obno; /* old block number (offset) */ | |
4229 | xfs_fileoff_t end; /* end of mapped file region */ | |
4230 | xfs_extnum_t lastx; /* last useful extent number */ | |
4231 | int eof; /* we've hit the end of extents */ | |
4232 | int n = 0; /* current extent index */ | |
4233 | int error = 0; | |
c0dc7828 | 4234 | |
1da177e4 | 4235 | ASSERT(*nmap >= 1); |
c0dc7828 | 4236 | ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); |
9e5987a7 | 4237 | ASSERT(!(flags & ~XFS_BMAPI_ENTIRE)); |
eef334e5 | 4238 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
c0dc7828 | 4239 | |
1da177e4 | 4240 | if (unlikely(XFS_TEST_ERROR( |
9e5987a7 DC |
4241 | (XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS && |
4242 | XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE), | |
1da177e4 | 4243 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { |
9e5987a7 | 4244 | XFS_ERROR_REPORT("xfs_bmapi_delay", XFS_ERRLEVEL_LOW, mp); |
2451337d | 4245 | return -EFSCORRUPTED; |
1da177e4 | 4246 | } |
c0dc7828 | 4247 | |
1da177e4 | 4248 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4249 | return -EIO; |
c0dc7828 | 4250 | |
c0dc7828 DC |
4251 | XFS_STATS_INC(xs_blk_mapw); |
4252 | ||
c0dc7828 | 4253 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { |
9e5987a7 | 4254 | error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK); |
c0dc7828 | 4255 | if (error) |
9e5987a7 | 4256 | return error; |
c0dc7828 DC |
4257 | } |
4258 | ||
9e5987a7 | 4259 | xfs_bmap_search_extents(ip, bno, XFS_DATA_FORK, &eof, &lastx, &got, &prev); |
1da177e4 LT |
4260 | end = bno + len; |
4261 | obno = bno; | |
7e47a4ef | 4262 | |
1da177e4 | 4263 | while (bno < end && n < *nmap) { |
9e5987a7 DC |
4264 | if (eof || got.br_startoff > bno) { |
4265 | error = xfs_bmapi_reserve_delalloc(ip, bno, len, &got, | |
4266 | &prev, &lastx, eof); | |
4267 | if (error) { | |
4268 | if (n == 0) { | |
4269 | *nmap = 0; | |
4270 | return error; | |
4271 | } | |
4272 | break; | |
4273 | } | |
4274 | } | |
c0dc7828 | 4275 | |
9e5987a7 DC |
4276 | /* set up the extent map to return. */ |
4277 | xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); | |
aef9a895 DC |
4278 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); |
4279 | ||
9e5987a7 DC |
4280 | /* If we're done, stop now. */ |
4281 | if (bno >= end || n >= *nmap) | |
1da177e4 | 4282 | break; |
c0dc7828 DC |
4283 | |
4284 | /* Else go on to the next record. */ | |
9e5987a7 DC |
4285 | prev = got; |
4286 | if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) | |
4287 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got); | |
4288 | else | |
5690f921 | 4289 | eof = 1; |
1da177e4 | 4290 | } |
9e5987a7 | 4291 | |
1da177e4 | 4292 | *nmap = n; |
9e5987a7 DC |
4293 | return 0; |
4294 | } | |
c0dc7828 | 4295 | |
c315c90b | 4296 | |
cf11da9c DC |
4297 | static int |
4298 | xfs_bmapi_allocate( | |
9e5987a7 DC |
4299 | struct xfs_bmalloca *bma) |
4300 | { | |
4301 | struct xfs_mount *mp = bma->ip->i_mount; | |
4302 | int whichfork = (bma->flags & XFS_BMAPI_ATTRFORK) ? | |
4303 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
4304 | struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); | |
4305 | int tmp_logflags = 0; | |
4306 | int error; | |
9e5987a7 DC |
4307 | |
4308 | ASSERT(bma->length > 0); | |
4309 | ||
1da177e4 | 4310 | /* |
9e5987a7 DC |
4311 | * For the wasdelay case, we could also just allocate the stuff asked |
4312 | * for in this bmap call but that wouldn't be as good. | |
1da177e4 | 4313 | */ |
9e5987a7 DC |
4314 | if (bma->wasdel) { |
4315 | bma->length = (xfs_extlen_t)bma->got.br_blockcount; | |
4316 | bma->offset = bma->got.br_startoff; | |
4317 | if (bma->idx != NULLEXTNUM && bma->idx) { | |
4318 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), | |
4319 | &bma->prev); | |
1da177e4 | 4320 | } |
9e5987a7 DC |
4321 | } else { |
4322 | bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN); | |
4323 | if (!bma->eof) | |
4324 | bma->length = XFS_FILBLKS_MIN(bma->length, | |
4325 | bma->got.br_startoff - bma->offset); | |
1da177e4 | 4326 | } |
1da177e4 | 4327 | |
9e5987a7 DC |
4328 | /* |
4329 | * Indicate if this is the first user data in the file, or just any | |
4330 | * user data. | |
4331 | */ | |
4332 | if (!(bma->flags & XFS_BMAPI_METADATA)) { | |
4333 | bma->userdata = (bma->offset == 0) ? | |
4334 | XFS_ALLOC_INITIAL_USER_DATA : XFS_ALLOC_USERDATA; | |
4335 | } | |
1da177e4 | 4336 | |
9e5987a7 | 4337 | bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1; |
0b1b213f | 4338 | |
9e5987a7 DC |
4339 | /* |
4340 | * Only want to do the alignment at the eof if it is userdata and | |
4341 | * allocation length is larger than a stripe unit. | |
4342 | */ | |
4343 | if (mp->m_dalign && bma->length >= mp->m_dalign && | |
4344 | !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) { | |
4345 | error = xfs_bmap_isaeof(bma, whichfork); | |
4346 | if (error) | |
4347 | return error; | |
1da177e4 | 4348 | } |
8096b1eb | 4349 | |
9e5987a7 DC |
4350 | error = xfs_bmap_alloc(bma); |
4351 | if (error) | |
1da177e4 | 4352 | return error; |
9e5987a7 DC |
4353 | |
4354 | if (bma->flist->xbf_low) | |
4355 | bma->minleft = 0; | |
4356 | if (bma->cur) | |
4357 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
4358 | if (bma->blkno == NULLFSBLOCK) | |
1da177e4 | 4359 | return 0; |
9e5987a7 DC |
4360 | if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { |
4361 | bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork); | |
4362 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
4363 | bma->cur->bc_private.b.flist = bma->flist; | |
1da177e4 | 4364 | } |
9e5987a7 DC |
4365 | /* |
4366 | * Bump the number of extents we've allocated | |
4367 | * in this call. | |
4368 | */ | |
4369 | bma->nallocs++; | |
4370 | ||
4371 | if (bma->cur) | |
4372 | bma->cur->bc_private.b.flags = | |
4373 | bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; | |
4374 | ||
4375 | bma->got.br_startoff = bma->offset; | |
4376 | bma->got.br_startblock = bma->blkno; | |
4377 | bma->got.br_blockcount = bma->length; | |
4378 | bma->got.br_state = XFS_EXT_NORM; | |
b4e9181e | 4379 | |
1da177e4 | 4380 | /* |
9e5987a7 DC |
4381 | * A wasdelay extent has been initialized, so shouldn't be flagged |
4382 | * as unwritten. | |
1da177e4 | 4383 | */ |
9e5987a7 DC |
4384 | if (!bma->wasdel && (bma->flags & XFS_BMAPI_PREALLOC) && |
4385 | xfs_sb_version_hasextflgbit(&mp->m_sb)) | |
4386 | bma->got.br_state = XFS_EXT_UNWRITTEN; | |
4387 | ||
4388 | if (bma->wasdel) | |
4389 | error = xfs_bmap_add_extent_delay_real(bma); | |
4390 | else | |
4391 | error = xfs_bmap_add_extent_hole_real(bma, whichfork); | |
4392 | ||
4393 | bma->logflags |= tmp_logflags; | |
4394 | if (error) | |
4395 | return error; | |
4396 | ||
4397 | /* | |
4398 | * Update our extent pointer, given that xfs_bmap_add_extent_delay_real | |
4399 | * or xfs_bmap_add_extent_hole_real might have merged it into one of | |
4400 | * the neighbouring ones. | |
4401 | */ | |
4402 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); | |
4403 | ||
4404 | ASSERT(bma->got.br_startoff <= bma->offset); | |
4405 | ASSERT(bma->got.br_startoff + bma->got.br_blockcount >= | |
4406 | bma->offset + bma->length); | |
4407 | ASSERT(bma->got.br_state == XFS_EXT_NORM || | |
4408 | bma->got.br_state == XFS_EXT_UNWRITTEN); | |
4409 | return 0; | |
4410 | } | |
4411 | ||
9e5987a7 DC |
4412 | STATIC int |
4413 | xfs_bmapi_convert_unwritten( | |
4414 | struct xfs_bmalloca *bma, | |
4415 | struct xfs_bmbt_irec *mval, | |
4416 | xfs_filblks_t len, | |
4417 | int flags) | |
4418 | { | |
4419 | int whichfork = (flags & XFS_BMAPI_ATTRFORK) ? | |
4420 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
4421 | struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); | |
4422 | int tmp_logflags = 0; | |
4423 | int error; | |
4424 | ||
4425 | /* check if we need to do unwritten->real conversion */ | |
4426 | if (mval->br_state == XFS_EXT_UNWRITTEN && | |
4427 | (flags & XFS_BMAPI_PREALLOC)) | |
4428 | return 0; | |
4429 | ||
4430 | /* check if we need to do real->unwritten conversion */ | |
4431 | if (mval->br_state == XFS_EXT_NORM && | |
4432 | (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) != | |
4433 | (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) | |
4434 | return 0; | |
4435 | ||
4436 | /* | |
4437 | * Modify (by adding) the state flag, if writing. | |
4438 | */ | |
4439 | ASSERT(mval->br_blockcount <= len); | |
4440 | if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { | |
4441 | bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp, | |
4442 | bma->ip, whichfork); | |
4443 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
4444 | bma->cur->bc_private.b.flist = bma->flist; | |
1da177e4 | 4445 | } |
9e5987a7 DC |
4446 | mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN) |
4447 | ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN; | |
5575acc7 | 4448 | |
9e5987a7 DC |
4449 | error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, &bma->idx, |
4450 | &bma->cur, mval, bma->firstblock, bma->flist, | |
4451 | &tmp_logflags); | |
4452 | bma->logflags |= tmp_logflags; | |
4453 | if (error) | |
4454 | return error; | |
4455 | ||
4456 | /* | |
4457 | * Update our extent pointer, given that | |
4458 | * xfs_bmap_add_extent_unwritten_real might have merged it into one | |
4459 | * of the neighbouring ones. | |
4460 | */ | |
4461 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); | |
4462 | ||
4463 | /* | |
4464 | * We may have combined previously unwritten space with written space, | |
4465 | * so generate another request. | |
4466 | */ | |
4467 | if (mval->br_blockcount < len) | |
2451337d | 4468 | return -EAGAIN; |
9e5987a7 DC |
4469 | return 0; |
4470 | } | |
4471 | ||
4472 | /* | |
4473 | * Map file blocks to filesystem blocks, and allocate blocks or convert the | |
4474 | * extent state if necessary. Details behaviour is controlled by the flags | |
4475 | * parameter. Only allocates blocks from a single allocation group, to avoid | |
4476 | * locking problems. | |
4477 | * | |
4478 | * The returned value in "firstblock" from the first call in a transaction | |
4479 | * must be remembered and presented to subsequent calls in "firstblock". | |
4480 | * An upper bound for the number of blocks to be allocated is supplied to | |
4481 | * the first call in "total"; if no allocation group has that many free | |
4482 | * blocks then the call will fail (return NULLFSBLOCK in "firstblock"). | |
4483 | */ | |
4484 | int | |
4485 | xfs_bmapi_write( | |
4486 | struct xfs_trans *tp, /* transaction pointer */ | |
4487 | struct xfs_inode *ip, /* incore inode */ | |
4488 | xfs_fileoff_t bno, /* starting file offs. mapped */ | |
4489 | xfs_filblks_t len, /* length to map in file */ | |
4490 | int flags, /* XFS_BMAPI_... */ | |
4491 | xfs_fsblock_t *firstblock, /* first allocated block | |
4492 | controls a.g. for allocs */ | |
4493 | xfs_extlen_t total, /* total blocks needed */ | |
4494 | struct xfs_bmbt_irec *mval, /* output: map values */ | |
4495 | int *nmap, /* i/o: mval size/count */ | |
4496 | struct xfs_bmap_free *flist) /* i/o: list extents to free */ | |
4497 | { | |
4498 | struct xfs_mount *mp = ip->i_mount; | |
4499 | struct xfs_ifork *ifp; | |
a30b0367 | 4500 | struct xfs_bmalloca bma = { NULL }; /* args for xfs_bmap_alloc */ |
9e5987a7 DC |
4501 | xfs_fileoff_t end; /* end of mapped file region */ |
4502 | int eof; /* after the end of extents */ | |
4503 | int error; /* error return */ | |
4504 | int n; /* current extent index */ | |
4505 | xfs_fileoff_t obno; /* old block number (offset) */ | |
4506 | int whichfork; /* data or attr fork */ | |
4507 | char inhole; /* current location is hole in file */ | |
4508 | char wasdelay; /* old extent was delayed */ | |
4509 | ||
4510 | #ifdef DEBUG | |
4511 | xfs_fileoff_t orig_bno; /* original block number value */ | |
4512 | int orig_flags; /* original flags arg value */ | |
4513 | xfs_filblks_t orig_len; /* original value of len arg */ | |
4514 | struct xfs_bmbt_irec *orig_mval; /* original value of mval */ | |
4515 | int orig_nmap; /* original value of *nmap */ | |
4516 | ||
4517 | orig_bno = bno; | |
4518 | orig_len = len; | |
4519 | orig_flags = flags; | |
4520 | orig_mval = mval; | |
4521 | orig_nmap = *nmap; | |
4522 | #endif | |
f3508bcd DC |
4523 | whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
4524 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
9e5987a7 DC |
4525 | |
4526 | ASSERT(*nmap >= 1); | |
4527 | ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); | |
4528 | ASSERT(!(flags & XFS_BMAPI_IGSTATE)); | |
4529 | ASSERT(tp != NULL); | |
4530 | ASSERT(len > 0); | |
f3508bcd | 4531 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL); |
eef334e5 | 4532 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
9e5987a7 DC |
4533 | |
4534 | if (unlikely(XFS_TEST_ERROR( | |
4535 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
f3508bcd | 4536 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), |
9e5987a7 DC |
4537 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { |
4538 | XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 4539 | return -EFSCORRUPTED; |
5575acc7 KD |
4540 | } |
4541 | ||
9e5987a7 | 4542 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4543 | return -EIO; |
9e5987a7 DC |
4544 | |
4545 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4546 | ||
4547 | XFS_STATS_INC(xs_blk_mapw); | |
4548 | ||
9e5987a7 DC |
4549 | if (*firstblock == NULLFSBLOCK) { |
4550 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE) | |
4551 | bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
4552 | else | |
4553 | bma.minleft = 1; | |
4554 | } else { | |
4555 | bma.minleft = 0; | |
4556 | } | |
4557 | ||
4558 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
4559 | error = xfs_iread_extents(tp, ip, whichfork); | |
4560 | if (error) | |
4561 | goto error0; | |
4562 | } | |
4563 | ||
4564 | xfs_bmap_search_extents(ip, bno, whichfork, &eof, &bma.idx, &bma.got, | |
4565 | &bma.prev); | |
4566 | n = 0; | |
4567 | end = bno + len; | |
4568 | obno = bno; | |
4569 | ||
4570 | bma.tp = tp; | |
4571 | bma.ip = ip; | |
4572 | bma.total = total; | |
4573 | bma.userdata = 0; | |
4574 | bma.flist = flist; | |
4575 | bma.firstblock = firstblock; | |
4576 | ||
9e5987a7 DC |
4577 | while (bno < end && n < *nmap) { |
4578 | inhole = eof || bma.got.br_startoff > bno; | |
4579 | wasdelay = !inhole && isnullstartblock(bma.got.br_startblock); | |
4580 | ||
1da177e4 | 4581 | /* |
9e5987a7 DC |
4582 | * First, deal with the hole before the allocated space |
4583 | * that we found, if any. | |
1da177e4 | 4584 | */ |
9e5987a7 DC |
4585 | if (inhole || wasdelay) { |
4586 | bma.eof = eof; | |
4587 | bma.conv = !!(flags & XFS_BMAPI_CONVERT); | |
4588 | bma.wasdel = wasdelay; | |
4589 | bma.offset = bno; | |
4590 | bma.flags = flags; | |
4591 | ||
1da177e4 | 4592 | /* |
9e5987a7 DC |
4593 | * There's a 32/64 bit type mismatch between the |
4594 | * allocation length request (which can be 64 bits in | |
4595 | * length) and the bma length request, which is | |
4596 | * xfs_extlen_t and therefore 32 bits. Hence we have to | |
4597 | * check for 32-bit overflows and handle them here. | |
1da177e4 | 4598 | */ |
9e5987a7 DC |
4599 | if (len > (xfs_filblks_t)MAXEXTLEN) |
4600 | bma.length = MAXEXTLEN; | |
4601 | else | |
4602 | bma.length = len; | |
4603 | ||
4604 | ASSERT(len > 0); | |
4605 | ASSERT(bma.length > 0); | |
4606 | error = xfs_bmapi_allocate(&bma); | |
1da177e4 LT |
4607 | if (error) |
4608 | goto error0; | |
9e5987a7 DC |
4609 | if (bma.blkno == NULLFSBLOCK) |
4610 | break; | |
1da177e4 | 4611 | } |
9e5987a7 DC |
4612 | |
4613 | /* Deal with the allocated space we found. */ | |
4614 | xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno, | |
4615 | end, n, flags); | |
4616 | ||
4617 | /* Execute unwritten extent conversion if necessary */ | |
4618 | error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags); | |
2451337d | 4619 | if (error == -EAGAIN) |
9e5987a7 DC |
4620 | continue; |
4621 | if (error) | |
4622 | goto error0; | |
4623 | ||
4624 | /* update the extent map to return */ | |
4625 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); | |
4626 | ||
4627 | /* | |
4628 | * If we're done, stop now. Stop when we've allocated | |
4629 | * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise | |
4630 | * the transaction may get too big. | |
4631 | */ | |
4632 | if (bno >= end || n >= *nmap || bma.nallocs >= *nmap) | |
4633 | break; | |
4634 | ||
4635 | /* Else go on to the next record. */ | |
4636 | bma.prev = bma.got; | |
4637 | if (++bma.idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) { | |
4638 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma.idx), | |
4639 | &bma.got); | |
4640 | } else | |
4641 | eof = 1; | |
4642 | } | |
4643 | *nmap = n; | |
4644 | ||
4645 | /* | |
4646 | * Transform from btree to extents, give it cur. | |
4647 | */ | |
4648 | if (xfs_bmap_wants_extents(ip, whichfork)) { | |
4649 | int tmp_logflags = 0; | |
4650 | ||
4651 | ASSERT(bma.cur); | |
4652 | error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, | |
4653 | &tmp_logflags, whichfork); | |
4654 | bma.logflags |= tmp_logflags; | |
4655 | if (error) | |
4656 | goto error0; | |
4657 | } | |
4658 | ||
4659 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE || | |
4660 | XFS_IFORK_NEXTENTS(ip, whichfork) > | |
4661 | XFS_IFORK_MAXEXT(ip, whichfork)); | |
4662 | error = 0; | |
4663 | error0: | |
4664 | /* | |
4665 | * Log everything. Do this after conversion, there's no point in | |
4666 | * logging the extent records if we've converted to btree format. | |
4667 | */ | |
4668 | if ((bma.logflags & xfs_ilog_fext(whichfork)) && | |
4669 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
4670 | bma.logflags &= ~xfs_ilog_fext(whichfork); | |
4671 | else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) && | |
4672 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) | |
4673 | bma.logflags &= ~xfs_ilog_fbroot(whichfork); | |
4674 | /* | |
4675 | * Log whatever the flags say, even if error. Otherwise we might miss | |
4676 | * detecting a case where the data is changed, there's an error, | |
4677 | * and it's not logged so we don't shutdown when we should. | |
4678 | */ | |
4679 | if (bma.logflags) | |
4680 | xfs_trans_log_inode(tp, ip, bma.logflags); | |
4681 | ||
4682 | if (bma.cur) { | |
4683 | if (!error) { | |
4684 | ASSERT(*firstblock == NULLFSBLOCK || | |
4685 | XFS_FSB_TO_AGNO(mp, *firstblock) == | |
4686 | XFS_FSB_TO_AGNO(mp, | |
4687 | bma.cur->bc_private.b.firstblock) || | |
4688 | (flist->xbf_low && | |
4689 | XFS_FSB_TO_AGNO(mp, *firstblock) < | |
4690 | XFS_FSB_TO_AGNO(mp, | |
4691 | bma.cur->bc_private.b.firstblock))); | |
4692 | *firstblock = bma.cur->bc_private.b.firstblock; | |
1da177e4 | 4693 | } |
9e5987a7 DC |
4694 | xfs_btree_del_cursor(bma.cur, |
4695 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
4696 | } | |
4697 | if (!error) | |
4698 | xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, | |
4699 | orig_nmap, *nmap); | |
4700 | return error; | |
4701 | } | |
06d10dd9 | 4702 | |
9e5987a7 DC |
4703 | /* |
4704 | * Called by xfs_bmapi to update file extent records and the btree | |
4705 | * after removing space (or undoing a delayed allocation). | |
4706 | */ | |
4707 | STATIC int /* error */ | |
4708 | xfs_bmap_del_extent( | |
4709 | xfs_inode_t *ip, /* incore inode pointer */ | |
4710 | xfs_trans_t *tp, /* current transaction pointer */ | |
4711 | xfs_extnum_t *idx, /* extent number to update/delete */ | |
4712 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
4713 | xfs_btree_cur_t *cur, /* if null, not a btree */ | |
4714 | xfs_bmbt_irec_t *del, /* data to remove from extents */ | |
4715 | int *logflagsp, /* inode logging flags */ | |
4716 | int whichfork) /* data or attr fork */ | |
4717 | { | |
4718 | xfs_filblks_t da_new; /* new delay-alloc indirect blocks */ | |
4719 | xfs_filblks_t da_old; /* old delay-alloc indirect blocks */ | |
4720 | xfs_fsblock_t del_endblock=0; /* first block past del */ | |
4721 | xfs_fileoff_t del_endoff; /* first offset past del */ | |
4722 | int delay; /* current block is delayed allocated */ | |
4723 | int do_fx; /* free extent at end of routine */ | |
4724 | xfs_bmbt_rec_host_t *ep; /* current extent entry pointer */ | |
4725 | int error; /* error return value */ | |
4726 | int flags; /* inode logging flags */ | |
4727 | xfs_bmbt_irec_t got; /* current extent entry */ | |
4728 | xfs_fileoff_t got_endoff; /* first offset past got */ | |
4729 | int i; /* temp state */ | |
4730 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
4731 | xfs_mount_t *mp; /* mount structure */ | |
4732 | xfs_filblks_t nblks; /* quota/sb block count */ | |
4733 | xfs_bmbt_irec_t new; /* new record to be inserted */ | |
4734 | /* REFERENCED */ | |
4735 | uint qfield; /* quota field to update */ | |
4736 | xfs_filblks_t temp; /* for indirect length calculations */ | |
4737 | xfs_filblks_t temp2; /* for indirect length calculations */ | |
4738 | int state = 0; | |
4739 | ||
4740 | XFS_STATS_INC(xs_del_exlist); | |
4741 | ||
4742 | if (whichfork == XFS_ATTR_FORK) | |
4743 | state |= BMAP_ATTRFORK; | |
4744 | ||
4745 | mp = ip->i_mount; | |
4746 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4747 | ASSERT((*idx >= 0) && (*idx < ifp->if_bytes / | |
4748 | (uint)sizeof(xfs_bmbt_rec_t))); | |
4749 | ASSERT(del->br_blockcount > 0); | |
4750 | ep = xfs_iext_get_ext(ifp, *idx); | |
4751 | xfs_bmbt_get_all(ep, &got); | |
4752 | ASSERT(got.br_startoff <= del->br_startoff); | |
4753 | del_endoff = del->br_startoff + del->br_blockcount; | |
4754 | got_endoff = got.br_startoff + got.br_blockcount; | |
4755 | ASSERT(got_endoff >= del_endoff); | |
4756 | delay = isnullstartblock(got.br_startblock); | |
4757 | ASSERT(isnullstartblock(del->br_startblock) == delay); | |
4758 | flags = 0; | |
4759 | qfield = 0; | |
4760 | error = 0; | |
4761 | /* | |
4762 | * If deleting a real allocation, must free up the disk space. | |
4763 | */ | |
4764 | if (!delay) { | |
4765 | flags = XFS_ILOG_CORE; | |
4766 | /* | |
4767 | * Realtime allocation. Free it and record di_nblocks update. | |
4768 | */ | |
4769 | if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { | |
4770 | xfs_fsblock_t bno; | |
4771 | xfs_filblks_t len; | |
4772 | ||
4773 | ASSERT(do_mod(del->br_blockcount, | |
4774 | mp->m_sb.sb_rextsize) == 0); | |
4775 | ASSERT(do_mod(del->br_startblock, | |
4776 | mp->m_sb.sb_rextsize) == 0); | |
4777 | bno = del->br_startblock; | |
4778 | len = del->br_blockcount; | |
4779 | do_div(bno, mp->m_sb.sb_rextsize); | |
4780 | do_div(len, mp->m_sb.sb_rextsize); | |
4781 | error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); | |
4782 | if (error) | |
4783 | goto done; | |
4784 | do_fx = 0; | |
4785 | nblks = len * mp->m_sb.sb_rextsize; | |
4786 | qfield = XFS_TRANS_DQ_RTBCOUNT; | |
4787 | } | |
1da177e4 | 4788 | /* |
9e5987a7 | 4789 | * Ordinary allocation. |
1da177e4 | 4790 | */ |
9e5987a7 DC |
4791 | else { |
4792 | do_fx = 1; | |
4793 | nblks = del->br_blockcount; | |
4794 | qfield = XFS_TRANS_DQ_BCOUNT; | |
1da177e4 | 4795 | } |
1da177e4 | 4796 | /* |
9e5987a7 | 4797 | * Set up del_endblock and cur for later. |
1da177e4 | 4798 | */ |
9e5987a7 DC |
4799 | del_endblock = del->br_startblock + del->br_blockcount; |
4800 | if (cur) { | |
4801 | if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
4802 | got.br_startblock, got.br_blockcount, | |
4803 | &i))) | |
4804 | goto done; | |
4805 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
1da177e4 | 4806 | } |
9e5987a7 DC |
4807 | da_old = da_new = 0; |
4808 | } else { | |
4809 | da_old = startblockval(got.br_startblock); | |
4810 | da_new = 0; | |
4811 | nblks = 0; | |
4812 | do_fx = 0; | |
1da177e4 LT |
4813 | } |
4814 | /* | |
9e5987a7 DC |
4815 | * Set flag value to use in switch statement. |
4816 | * Left-contig is 2, right-contig is 1. | |
1da177e4 | 4817 | */ |
9e5987a7 DC |
4818 | switch (((got.br_startoff == del->br_startoff) << 1) | |
4819 | (got_endoff == del_endoff)) { | |
4820 | case 3: | |
4821 | /* | |
4822 | * Matches the whole extent. Delete the entry. | |
4823 | */ | |
4824 | xfs_iext_remove(ip, *idx, 1, | |
4825 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0); | |
4826 | --*idx; | |
4827 | if (delay) | |
4828 | break; | |
4829 | ||
4830 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
4831 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
4832 | flags |= XFS_ILOG_CORE; | |
4833 | if (!cur) { | |
4834 | flags |= xfs_ilog_fext(whichfork); | |
4835 | break; | |
4836 | } | |
4837 | if ((error = xfs_btree_delete(cur, &i))) | |
4838 | goto done; | |
4839 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
4840 | break; | |
4841 | ||
4842 | case 2: | |
4843 | /* | |
4844 | * Deleting the first part of the extent. | |
4845 | */ | |
4846 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4847 | xfs_bmbt_set_startoff(ep, del_endoff); | |
4848 | temp = got.br_blockcount - del->br_blockcount; | |
4849 | xfs_bmbt_set_blockcount(ep, temp); | |
4850 | if (delay) { | |
4851 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
4852 | da_old); | |
4853 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
4854 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4855 | da_new = temp; | |
4856 | break; | |
4857 | } | |
4858 | xfs_bmbt_set_startblock(ep, del_endblock); | |
4859 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4860 | if (!cur) { | |
4861 | flags |= xfs_ilog_fext(whichfork); | |
4862 | break; | |
4863 | } | |
4864 | if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock, | |
4865 | got.br_blockcount - del->br_blockcount, | |
4866 | got.br_state))) | |
4867 | goto done; | |
4868 | break; | |
4869 | ||
4870 | case 1: | |
4871 | /* | |
4872 | * Deleting the last part of the extent. | |
4873 | */ | |
4874 | temp = got.br_blockcount - del->br_blockcount; | |
4875 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4876 | xfs_bmbt_set_blockcount(ep, temp); | |
4877 | if (delay) { | |
4878 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
4879 | da_old); | |
4880 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
4881 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4882 | da_new = temp; | |
4883 | break; | |
4884 | } | |
4885 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4886 | if (!cur) { | |
4887 | flags |= xfs_ilog_fext(whichfork); | |
4888 | break; | |
4889 | } | |
4890 | if ((error = xfs_bmbt_update(cur, got.br_startoff, | |
4891 | got.br_startblock, | |
4892 | got.br_blockcount - del->br_blockcount, | |
4893 | got.br_state))) | |
4894 | goto done; | |
4895 | break; | |
4896 | ||
4897 | case 0: | |
4898 | /* | |
4899 | * Deleting the middle of the extent. | |
4900 | */ | |
4901 | temp = del->br_startoff - got.br_startoff; | |
4902 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4903 | xfs_bmbt_set_blockcount(ep, temp); | |
4904 | new.br_startoff = del_endoff; | |
4905 | temp2 = got_endoff - del_endoff; | |
4906 | new.br_blockcount = temp2; | |
4907 | new.br_state = got.br_state; | |
4908 | if (!delay) { | |
4909 | new.br_startblock = del_endblock; | |
4910 | flags |= XFS_ILOG_CORE; | |
4911 | if (cur) { | |
4912 | if ((error = xfs_bmbt_update(cur, | |
4913 | got.br_startoff, | |
4914 | got.br_startblock, temp, | |
4915 | got.br_state))) | |
4916 | goto done; | |
4917 | if ((error = xfs_btree_increment(cur, 0, &i))) | |
4918 | goto done; | |
4919 | cur->bc_rec.b = new; | |
4920 | error = xfs_btree_insert(cur, &i); | |
2451337d | 4921 | if (error && error != -ENOSPC) |
9e5987a7 DC |
4922 | goto done; |
4923 | /* | |
4924 | * If get no-space back from btree insert, | |
4925 | * it tried a split, and we have a zero | |
4926 | * block reservation. | |
4927 | * Fix up our state and return the error. | |
4928 | */ | |
2451337d | 4929 | if (error == -ENOSPC) { |
9e5987a7 DC |
4930 | /* |
4931 | * Reset the cursor, don't trust | |
4932 | * it after any insert operation. | |
4933 | */ | |
4934 | if ((error = xfs_bmbt_lookup_eq(cur, | |
4935 | got.br_startoff, | |
4936 | got.br_startblock, | |
4937 | temp, &i))) | |
4938 | goto done; | |
4939 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
4940 | /* | |
4941 | * Update the btree record back | |
4942 | * to the original value. | |
4943 | */ | |
4944 | if ((error = xfs_bmbt_update(cur, | |
4945 | got.br_startoff, | |
4946 | got.br_startblock, | |
4947 | got.br_blockcount, | |
4948 | got.br_state))) | |
4949 | goto done; | |
4950 | /* | |
4951 | * Reset the extent record back | |
4952 | * to the original value. | |
4953 | */ | |
4954 | xfs_bmbt_set_blockcount(ep, | |
4955 | got.br_blockcount); | |
4956 | flags = 0; | |
2451337d | 4957 | error = -ENOSPC; |
9e5987a7 DC |
4958 | goto done; |
4959 | } | |
4960 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); | |
4961 | } else | |
4962 | flags |= xfs_ilog_fext(whichfork); | |
4963 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
4964 | XFS_IFORK_NEXTENTS(ip, whichfork) + 1); | |
4965 | } else { | |
4966 | ASSERT(whichfork == XFS_DATA_FORK); | |
4967 | temp = xfs_bmap_worst_indlen(ip, temp); | |
4968 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
4969 | temp2 = xfs_bmap_worst_indlen(ip, temp2); | |
4970 | new.br_startblock = nullstartblock((int)temp2); | |
4971 | da_new = temp + temp2; | |
4972 | while (da_new > da_old) { | |
4973 | if (temp) { | |
4974 | temp--; | |
4975 | da_new--; | |
4976 | xfs_bmbt_set_startblock(ep, | |
4977 | nullstartblock((int)temp)); | |
4978 | } | |
4979 | if (da_new == da_old) | |
4980 | break; | |
4981 | if (temp2) { | |
4982 | temp2--; | |
4983 | da_new--; | |
4984 | new.br_startblock = | |
4985 | nullstartblock((int)temp2); | |
4986 | } | |
4987 | } | |
4988 | } | |
4989 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4990 | xfs_iext_insert(ip, *idx + 1, 1, &new, state); | |
4991 | ++*idx; | |
4992 | break; | |
1da177e4 LT |
4993 | } |
4994 | /* | |
9e5987a7 | 4995 | * If we need to, add to list of extents to delete. |
1da177e4 | 4996 | */ |
9e5987a7 DC |
4997 | if (do_fx) |
4998 | xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist, | |
4999 | mp); | |
1da177e4 | 5000 | /* |
9e5987a7 | 5001 | * Adjust inode # blocks in the file. |
1da177e4 | 5002 | */ |
9e5987a7 DC |
5003 | if (nblks) |
5004 | ip->i_d.di_nblocks -= nblks; | |
1da177e4 | 5005 | /* |
9e5987a7 | 5006 | * Adjust quota data. |
1da177e4 | 5007 | */ |
9e5987a7 DC |
5008 | if (qfield) |
5009 | xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks); | |
5010 | ||
5011 | /* | |
5012 | * Account for change in delayed indirect blocks. | |
5013 | * Nothing to do for disk quota accounting here. | |
5014 | */ | |
5015 | ASSERT(da_old >= da_new); | |
5016 | if (da_old > da_new) { | |
5017 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, | |
5018 | (int64_t)(da_old - da_new), 0); | |
1da177e4 | 5019 | } |
9e5987a7 DC |
5020 | done: |
5021 | *logflagsp = flags; | |
1da177e4 LT |
5022 | return error; |
5023 | } | |
5024 | ||
3bacbcd8 | 5025 | /* |
9e5987a7 DC |
5026 | * Unmap (remove) blocks from a file. |
5027 | * If nexts is nonzero then the number of extents to remove is limited to | |
5028 | * that value. If not all extents in the block range can be removed then | |
5029 | * *done is set. | |
3bacbcd8 | 5030 | */ |
9e5987a7 DC |
5031 | int /* error */ |
5032 | xfs_bunmapi( | |
5033 | xfs_trans_t *tp, /* transaction pointer */ | |
5034 | struct xfs_inode *ip, /* incore inode */ | |
5035 | xfs_fileoff_t bno, /* starting offset to unmap */ | |
5036 | xfs_filblks_t len, /* length to unmap in file */ | |
5037 | int flags, /* misc flags */ | |
5038 | xfs_extnum_t nexts, /* number of extents max */ | |
5039 | xfs_fsblock_t *firstblock, /* first allocated block | |
5040 | controls a.g. for allocs */ | |
5041 | xfs_bmap_free_t *flist, /* i/o: list extents to free */ | |
5042 | int *done) /* set if not done yet */ | |
3bacbcd8 | 5043 | { |
9e5987a7 DC |
5044 | xfs_btree_cur_t *cur; /* bmap btree cursor */ |
5045 | xfs_bmbt_irec_t del; /* extent being deleted */ | |
5046 | int eof; /* is deleting at eof */ | |
5047 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
5048 | int error; /* error return value */ | |
5049 | xfs_extnum_t extno; /* extent number in list */ | |
5050 | xfs_bmbt_irec_t got; /* current extent record */ | |
5af317c9 | 5051 | xfs_ifork_t *ifp; /* inode fork pointer */ |
9e5987a7 DC |
5052 | int isrt; /* freeing in rt area */ |
5053 | xfs_extnum_t lastx; /* last extent index used */ | |
5054 | int logflags; /* transaction logging flags */ | |
5055 | xfs_extlen_t mod; /* rt extent offset */ | |
5056 | xfs_mount_t *mp; /* mount structure */ | |
5057 | xfs_extnum_t nextents; /* number of file extents */ | |
5058 | xfs_bmbt_irec_t prev; /* previous extent record */ | |
5059 | xfs_fileoff_t start; /* first file offset deleted */ | |
5060 | int tmp_logflags; /* partial logging flags */ | |
5061 | int wasdel; /* was a delayed alloc extent */ | |
5062 | int whichfork; /* data or attribute fork */ | |
5063 | xfs_fsblock_t sum; | |
1da177e4 | 5064 | |
9e5987a7 | 5065 | trace_xfs_bunmap(ip, bno, len, flags, _RET_IP_); |
1da177e4 | 5066 | |
9e5987a7 DC |
5067 | whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
5068 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
5069 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5070 | if (unlikely( | |
5071 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5072 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { | |
5073 | XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW, | |
5074 | ip->i_mount); | |
2451337d | 5075 | return -EFSCORRUPTED; |
1da177e4 | 5076 | } |
9e5987a7 DC |
5077 | mp = ip->i_mount; |
5078 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 5079 | return -EIO; |
1da177e4 | 5080 | |
eef334e5 | 5081 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
9e5987a7 DC |
5082 | ASSERT(len > 0); |
5083 | ASSERT(nexts >= 0); | |
1da177e4 | 5084 | |
9e5987a7 DC |
5085 | if (!(ifp->if_flags & XFS_IFEXTENTS) && |
5086 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
5087 | return error; | |
5088 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
5089 | if (nextents == 0) { | |
5090 | *done = 1; | |
5091 | return 0; | |
5092 | } | |
5093 | XFS_STATS_INC(xs_blk_unmap); | |
5094 | isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); | |
5095 | start = bno; | |
5096 | bno = start + len - 1; | |
5097 | ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
5098 | &prev); | |
1da177e4 | 5099 | |
9e5987a7 DC |
5100 | /* |
5101 | * Check to see if the given block number is past the end of the | |
5102 | * file, back up to the last block if so... | |
5103 | */ | |
5104 | if (eof) { | |
5105 | ep = xfs_iext_get_ext(ifp, --lastx); | |
5106 | xfs_bmbt_get_all(ep, &got); | |
5107 | bno = got.br_startoff + got.br_blockcount - 1; | |
5108 | } | |
5109 | logflags = 0; | |
5110 | if (ifp->if_flags & XFS_IFBROOT) { | |
5111 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
5112 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
5113 | cur->bc_private.b.firstblock = *firstblock; | |
5114 | cur->bc_private.b.flist = flist; | |
5115 | cur->bc_private.b.flags = 0; | |
5116 | } else | |
5117 | cur = NULL; | |
5118 | ||
5119 | if (isrt) { | |
5120 | /* | |
5121 | * Synchronize by locking the bitmap inode. | |
5122 | */ | |
5123 | xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL); | |
5124 | xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); | |
5125 | } | |
58e20770 | 5126 | |
9e5987a7 DC |
5127 | extno = 0; |
5128 | while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 && | |
5129 | (nexts == 0 || extno < nexts)) { | |
5130 | /* | |
5131 | * Is the found extent after a hole in which bno lives? | |
5132 | * Just back up to the previous extent, if so. | |
5133 | */ | |
5134 | if (got.br_startoff > bno) { | |
5135 | if (--lastx < 0) | |
5136 | break; | |
5137 | ep = xfs_iext_get_ext(ifp, lastx); | |
5138 | xfs_bmbt_get_all(ep, &got); | |
5139 | } | |
5140 | /* | |
5141 | * Is the last block of this extent before the range | |
5142 | * we're supposed to delete? If so, we're done. | |
5143 | */ | |
5144 | bno = XFS_FILEOFF_MIN(bno, | |
5145 | got.br_startoff + got.br_blockcount - 1); | |
5146 | if (bno < start) | |
5147 | break; | |
5148 | /* | |
5149 | * Then deal with the (possibly delayed) allocated space | |
5150 | * we found. | |
5151 | */ | |
5152 | ASSERT(ep != NULL); | |
5153 | del = got; | |
5154 | wasdel = isnullstartblock(del.br_startblock); | |
5155 | if (got.br_startoff < start) { | |
5156 | del.br_startoff = start; | |
5157 | del.br_blockcount -= start - got.br_startoff; | |
5158 | if (!wasdel) | |
5159 | del.br_startblock += start - got.br_startoff; | |
5160 | } | |
5161 | if (del.br_startoff + del.br_blockcount > bno + 1) | |
5162 | del.br_blockcount = bno + 1 - del.br_startoff; | |
5163 | sum = del.br_startblock + del.br_blockcount; | |
5164 | if (isrt && | |
5165 | (mod = do_mod(sum, mp->m_sb.sb_rextsize))) { | |
58e20770 | 5166 | /* |
9e5987a7 DC |
5167 | * Realtime extent not lined up at the end. |
5168 | * The extent could have been split into written | |
5169 | * and unwritten pieces, or we could just be | |
5170 | * unmapping part of it. But we can't really | |
5171 | * get rid of part of a realtime extent. | |
58e20770 | 5172 | */ |
9e5987a7 DC |
5173 | if (del.br_state == XFS_EXT_UNWRITTEN || |
5174 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { | |
5175 | /* | |
5176 | * This piece is unwritten, or we're not | |
5177 | * using unwritten extents. Skip over it. | |
5178 | */ | |
5179 | ASSERT(bno >= mod); | |
5180 | bno -= mod > del.br_blockcount ? | |
5181 | del.br_blockcount : mod; | |
5182 | if (bno < got.br_startoff) { | |
5183 | if (--lastx >= 0) | |
5184 | xfs_bmbt_get_all(xfs_iext_get_ext( | |
5185 | ifp, lastx), &got); | |
5186 | } | |
5187 | continue; | |
1da177e4 | 5188 | } |
9af25465 | 5189 | /* |
9e5987a7 DC |
5190 | * It's written, turn it unwritten. |
5191 | * This is better than zeroing it. | |
9af25465 | 5192 | */ |
9e5987a7 DC |
5193 | ASSERT(del.br_state == XFS_EXT_NORM); |
5194 | ASSERT(xfs_trans_get_block_res(tp) > 0); | |
5195 | /* | |
5196 | * If this spans a realtime extent boundary, | |
5197 | * chop it back to the start of the one we end at. | |
5198 | */ | |
5199 | if (del.br_blockcount > mod) { | |
5200 | del.br_startoff += del.br_blockcount - mod; | |
5201 | del.br_startblock += del.br_blockcount - mod; | |
5202 | del.br_blockcount = mod; | |
5203 | } | |
5204 | del.br_state = XFS_EXT_UNWRITTEN; | |
5205 | error = xfs_bmap_add_extent_unwritten_real(tp, ip, | |
5206 | &lastx, &cur, &del, firstblock, flist, | |
5207 | &logflags); | |
5208 | if (error) | |
5209 | goto error0; | |
5210 | goto nodelete; | |
5211 | } | |
5212 | if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) { | |
5213 | /* | |
5214 | * Realtime extent is lined up at the end but not | |
5215 | * at the front. We'll get rid of full extents if | |
5216 | * we can. | |
5217 | */ | |
5218 | mod = mp->m_sb.sb_rextsize - mod; | |
5219 | if (del.br_blockcount > mod) { | |
5220 | del.br_blockcount -= mod; | |
5221 | del.br_startoff += mod; | |
5222 | del.br_startblock += mod; | |
5223 | } else if ((del.br_startoff == start && | |
5224 | (del.br_state == XFS_EXT_UNWRITTEN || | |
5225 | xfs_trans_get_block_res(tp) == 0)) || | |
5226 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { | |
5227 | /* | |
5228 | * Can't make it unwritten. There isn't | |
5229 | * a full extent here so just skip it. | |
5230 | */ | |
5231 | ASSERT(bno >= del.br_blockcount); | |
5232 | bno -= del.br_blockcount; | |
5233 | if (got.br_startoff > bno) { | |
5234 | if (--lastx >= 0) { | |
5235 | ep = xfs_iext_get_ext(ifp, | |
5236 | lastx); | |
5237 | xfs_bmbt_get_all(ep, &got); | |
5238 | } | |
5239 | } | |
9af25465 | 5240 | continue; |
9e5987a7 DC |
5241 | } else if (del.br_state == XFS_EXT_UNWRITTEN) { |
5242 | /* | |
5243 | * This one is already unwritten. | |
5244 | * It must have a written left neighbor. | |
5245 | * Unwrite the killed part of that one and | |
5246 | * try again. | |
5247 | */ | |
5248 | ASSERT(lastx > 0); | |
5249 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, | |
5250 | lastx - 1), &prev); | |
5251 | ASSERT(prev.br_state == XFS_EXT_NORM); | |
5252 | ASSERT(!isnullstartblock(prev.br_startblock)); | |
5253 | ASSERT(del.br_startblock == | |
5254 | prev.br_startblock + prev.br_blockcount); | |
5255 | if (prev.br_startoff < start) { | |
5256 | mod = start - prev.br_startoff; | |
5257 | prev.br_blockcount -= mod; | |
5258 | prev.br_startblock += mod; | |
5259 | prev.br_startoff = start; | |
5260 | } | |
5261 | prev.br_state = XFS_EXT_UNWRITTEN; | |
5262 | lastx--; | |
5263 | error = xfs_bmap_add_extent_unwritten_real(tp, | |
5264 | ip, &lastx, &cur, &prev, | |
5265 | firstblock, flist, &logflags); | |
5266 | if (error) | |
5267 | goto error0; | |
5268 | goto nodelete; | |
5269 | } else { | |
5270 | ASSERT(del.br_state == XFS_EXT_NORM); | |
5271 | del.br_state = XFS_EXT_UNWRITTEN; | |
5272 | error = xfs_bmap_add_extent_unwritten_real(tp, | |
5273 | ip, &lastx, &cur, &del, | |
5274 | firstblock, flist, &logflags); | |
5275 | if (error) | |
5276 | goto error0; | |
5277 | goto nodelete; | |
9af25465 | 5278 | } |
1da177e4 | 5279 | } |
9e5987a7 DC |
5280 | if (wasdel) { |
5281 | ASSERT(startblockval(del.br_startblock) > 0); | |
5282 | /* Update realtime/data freespace, unreserve quota */ | |
5283 | if (isrt) { | |
5284 | xfs_filblks_t rtexts; | |
1da177e4 | 5285 | |
9e5987a7 DC |
5286 | rtexts = XFS_FSB_TO_B(mp, del.br_blockcount); |
5287 | do_div(rtexts, mp->m_sb.sb_rextsize); | |
5288 | xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS, | |
5289 | (int64_t)rtexts, 0); | |
5290 | (void)xfs_trans_reserve_quota_nblks(NULL, | |
5291 | ip, -((long)del.br_blockcount), 0, | |
5292 | XFS_QMOPT_RES_RTBLKS); | |
5293 | } else { | |
5294 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, | |
5295 | (int64_t)del.br_blockcount, 0); | |
5296 | (void)xfs_trans_reserve_quota_nblks(NULL, | |
5297 | ip, -((long)del.br_blockcount), 0, | |
5298 | XFS_QMOPT_RES_REGBLKS); | |
5299 | } | |
5300 | ip->i_delayed_blks -= del.br_blockcount; | |
5301 | if (cur) | |
5302 | cur->bc_private.b.flags |= | |
5303 | XFS_BTCUR_BPRV_WASDEL; | |
5304 | } else if (cur) | |
5305 | cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL; | |
5306 | /* | |
5307 | * If it's the case where the directory code is running | |
5308 | * with no block reservation, and the deleted block is in | |
5309 | * the middle of its extent, and the resulting insert | |
5310 | * of an extent would cause transformation to btree format, | |
5311 | * then reject it. The calling code will then swap | |
5312 | * blocks around instead. | |
5313 | * We have to do this now, rather than waiting for the | |
5314 | * conversion to btree format, since the transaction | |
5315 | * will be dirty. | |
5316 | */ | |
5317 | if (!wasdel && xfs_trans_get_block_res(tp) == 0 && | |
5318 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && | |
5319 | XFS_IFORK_NEXTENTS(ip, whichfork) >= /* Note the >= */ | |
5320 | XFS_IFORK_MAXEXT(ip, whichfork) && | |
5321 | del.br_startoff > got.br_startoff && | |
5322 | del.br_startoff + del.br_blockcount < | |
5323 | got.br_startoff + got.br_blockcount) { | |
2451337d | 5324 | error = -ENOSPC; |
9e5987a7 | 5325 | goto error0; |
1da177e4 | 5326 | } |
9e5987a7 DC |
5327 | error = xfs_bmap_del_extent(ip, tp, &lastx, flist, cur, &del, |
5328 | &tmp_logflags, whichfork); | |
5329 | logflags |= tmp_logflags; | |
5330 | if (error) | |
5331 | goto error0; | |
5332 | bno = del.br_startoff - 1; | |
5333 | nodelete: | |
1da177e4 | 5334 | /* |
9e5987a7 | 5335 | * If not done go on to the next (previous) record. |
1da177e4 | 5336 | */ |
9e5987a7 DC |
5337 | if (bno != (xfs_fileoff_t)-1 && bno >= start) { |
5338 | if (lastx >= 0) { | |
5339 | ep = xfs_iext_get_ext(ifp, lastx); | |
5340 | if (xfs_bmbt_get_startoff(ep) > bno) { | |
5341 | if (--lastx >= 0) | |
5342 | ep = xfs_iext_get_ext(ifp, | |
5343 | lastx); | |
5344 | } | |
5345 | xfs_bmbt_get_all(ep, &got); | |
1da177e4 | 5346 | } |
9e5987a7 | 5347 | extno++; |
1da177e4 LT |
5348 | } |
5349 | } | |
9e5987a7 | 5350 | *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0; |
576039cf | 5351 | |
1da177e4 | 5352 | /* |
9e5987a7 | 5353 | * Convert to a btree if necessary. |
1da177e4 | 5354 | */ |
9e5987a7 DC |
5355 | if (xfs_bmap_needs_btree(ip, whichfork)) { |
5356 | ASSERT(cur == NULL); | |
5357 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, | |
5358 | &cur, 0, &tmp_logflags, whichfork); | |
5359 | logflags |= tmp_logflags; | |
5360 | if (error) | |
5361 | goto error0; | |
1da177e4 | 5362 | } |
1da177e4 | 5363 | /* |
9e5987a7 | 5364 | * transform from btree to extents, give it cur |
1da177e4 | 5365 | */ |
9e5987a7 DC |
5366 | else if (xfs_bmap_wants_extents(ip, whichfork)) { |
5367 | ASSERT(cur != NULL); | |
5368 | error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags, | |
5369 | whichfork); | |
5370 | logflags |= tmp_logflags; | |
5371 | if (error) | |
5372 | goto error0; | |
5373 | } | |
1da177e4 | 5374 | /* |
9e5987a7 | 5375 | * transform from extents to local? |
1da177e4 | 5376 | */ |
9e5987a7 DC |
5377 | error = 0; |
5378 | error0: | |
5379 | /* | |
5380 | * Log everything. Do this after conversion, there's no point in | |
5381 | * logging the extent records if we've converted to btree format. | |
5382 | */ | |
5383 | if ((logflags & xfs_ilog_fext(whichfork)) && | |
5384 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
5385 | logflags &= ~xfs_ilog_fext(whichfork); | |
5386 | else if ((logflags & xfs_ilog_fbroot(whichfork)) && | |
5387 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) | |
5388 | logflags &= ~xfs_ilog_fbroot(whichfork); | |
5389 | /* | |
5390 | * Log inode even in the error case, if the transaction | |
5391 | * is dirty we'll need to shut down the filesystem. | |
5392 | */ | |
5393 | if (logflags) | |
5394 | xfs_trans_log_inode(tp, ip, logflags); | |
5395 | if (cur) { | |
5396 | if (!error) { | |
5397 | *firstblock = cur->bc_private.b.firstblock; | |
5398 | cur->bc_private.b.allocated = 0; | |
5399 | } | |
5400 | xfs_btree_del_cursor(cur, | |
5401 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
5402 | } | |
5403 | return error; | |
5404 | } | |
e1d8fb88 NJ |
5405 | |
5406 | /* | |
5407 | * Shift extent records to the left to cover a hole. | |
5408 | * | |
5409 | * The maximum number of extents to be shifted in a single operation | |
5410 | * is @num_exts, and @current_ext keeps track of the current extent | |
5411 | * index we have shifted. @offset_shift_fsb is the length by which each | |
5412 | * extent is shifted. If there is no hole to shift the extents | |
5413 | * into, this will be considered invalid operation and we abort immediately. | |
5414 | */ | |
5415 | int | |
5416 | xfs_bmap_shift_extents( | |
5417 | struct xfs_trans *tp, | |
5418 | struct xfs_inode *ip, | |
5419 | int *done, | |
5420 | xfs_fileoff_t start_fsb, | |
5421 | xfs_fileoff_t offset_shift_fsb, | |
5422 | xfs_extnum_t *current_ext, | |
5423 | xfs_fsblock_t *firstblock, | |
5424 | struct xfs_bmap_free *flist, | |
5425 | int num_exts) | |
5426 | { | |
ca446d88 | 5427 | struct xfs_btree_cur *cur = NULL; |
e1d8fb88 NJ |
5428 | struct xfs_bmbt_rec_host *gotp; |
5429 | struct xfs_bmbt_irec got; | |
5430 | struct xfs_bmbt_irec left; | |
5431 | struct xfs_mount *mp = ip->i_mount; | |
5432 | struct xfs_ifork *ifp; | |
5433 | xfs_extnum_t nexts = 0; | |
5434 | xfs_fileoff_t startoff; | |
5435 | int error = 0; | |
5436 | int i; | |
5437 | int whichfork = XFS_DATA_FORK; | |
ca446d88 | 5438 | int logflags = 0; |
e1d8fb88 | 5439 | xfs_filblks_t blockcount = 0; |
d39a2ced | 5440 | int total_extents; |
e1d8fb88 NJ |
5441 | |
5442 | if (unlikely(XFS_TEST_ERROR( | |
5443 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5444 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
5445 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
5446 | XFS_ERROR_REPORT("xfs_bmap_shift_extents", | |
5447 | XFS_ERRLEVEL_LOW, mp); | |
2451337d | 5448 | return -EFSCORRUPTED; |
e1d8fb88 NJ |
5449 | } |
5450 | ||
5451 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 5452 | return -EIO; |
e1d8fb88 NJ |
5453 | |
5454 | ASSERT(current_ext != NULL); | |
5455 | ||
5456 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
e1d8fb88 NJ |
5457 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { |
5458 | /* Read in all the extents */ | |
5459 | error = xfs_iread_extents(tp, ip, whichfork); | |
5460 | if (error) | |
5461 | return error; | |
5462 | } | |
5463 | ||
5464 | /* | |
5465 | * If *current_ext is 0, we would need to lookup the extent | |
5466 | * from where we would start shifting and store it in gotp. | |
5467 | */ | |
5468 | if (!*current_ext) { | |
5469 | gotp = xfs_iext_bno_to_ext(ifp, start_fsb, current_ext); | |
5470 | /* | |
5471 | * gotp can be null in 2 cases: 1) if there are no extents | |
5472 | * or 2) start_fsb lies in a hole beyond which there are | |
5473 | * no extents. Either way, we are done. | |
5474 | */ | |
5475 | if (!gotp) { | |
5476 | *done = 1; | |
5477 | return 0; | |
5478 | } | |
5479 | } | |
5480 | ||
e1d8fb88 NJ |
5481 | if (ifp->if_flags & XFS_IFBROOT) { |
5482 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
5483 | cur->bc_private.b.firstblock = *firstblock; | |
5484 | cur->bc_private.b.flist = flist; | |
5485 | cur->bc_private.b.flags = 0; | |
e1d8fb88 NJ |
5486 | } |
5487 | ||
d39a2ced DC |
5488 | /* |
5489 | * There may be delalloc extents in the data fork before the range we | |
5490 | * are collapsing out, so we cannot | |
5491 | * use the count of real extents here. Instead we have to calculate it | |
5492 | * from the incore fork. | |
5493 | */ | |
5494 | total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); | |
5495 | while (nexts++ < num_exts && *current_ext < total_extents) { | |
e1d8fb88 NJ |
5496 | |
5497 | gotp = xfs_iext_get_ext(ifp, *current_ext); | |
5498 | xfs_bmbt_get_all(gotp, &got); | |
5499 | startoff = got.br_startoff - offset_shift_fsb; | |
5500 | ||
5501 | /* | |
5502 | * Before shifting extent into hole, make sure that the hole | |
5503 | * is large enough to accomodate the shift. | |
5504 | */ | |
5505 | if (*current_ext) { | |
5506 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, | |
5507 | *current_ext - 1), &left); | |
5508 | ||
5509 | if (startoff < left.br_startoff + left.br_blockcount) | |
2451337d | 5510 | error = -EINVAL; |
e1d8fb88 NJ |
5511 | } else if (offset_shift_fsb > got.br_startoff) { |
5512 | /* | |
5513 | * When first extent is shifted, offset_shift_fsb | |
5514 | * should be less than the stating offset of | |
5515 | * the first extent. | |
5516 | */ | |
2451337d | 5517 | error = -EINVAL; |
e1d8fb88 NJ |
5518 | } |
5519 | ||
5520 | if (error) | |
5521 | goto del_cursor; | |
5522 | ||
5523 | if (cur) { | |
5524 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
5525 | got.br_startblock, | |
5526 | got.br_blockcount, | |
5527 | &i); | |
5528 | if (error) | |
5529 | goto del_cursor; | |
5530 | XFS_WANT_CORRUPTED_GOTO(i == 1, del_cursor); | |
5531 | } | |
5532 | ||
5533 | /* Check if we can merge 2 adjacent extents */ | |
5534 | if (*current_ext && | |
5535 | left.br_startoff + left.br_blockcount == startoff && | |
5536 | left.br_startblock + left.br_blockcount == | |
5537 | got.br_startblock && | |
5538 | left.br_state == got.br_state && | |
5539 | left.br_blockcount + got.br_blockcount <= MAXEXTLEN) { | |
5540 | blockcount = left.br_blockcount + | |
5541 | got.br_blockcount; | |
5542 | xfs_iext_remove(ip, *current_ext, 1, 0); | |
ca446d88 | 5543 | logflags |= XFS_ILOG_CORE; |
e1d8fb88 NJ |
5544 | if (cur) { |
5545 | error = xfs_btree_delete(cur, &i); | |
5546 | if (error) | |
5547 | goto del_cursor; | |
5548 | XFS_WANT_CORRUPTED_GOTO(i == 1, del_cursor); | |
ca446d88 BF |
5549 | } else { |
5550 | logflags |= XFS_ILOG_DEXT; | |
e1d8fb88 NJ |
5551 | } |
5552 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
5553 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
5554 | gotp = xfs_iext_get_ext(ifp, --*current_ext); | |
5555 | xfs_bmbt_get_all(gotp, &got); | |
5556 | ||
5557 | /* Make cursor point to the extent we will update */ | |
5558 | if (cur) { | |
5559 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
5560 | got.br_startblock, | |
5561 | got.br_blockcount, | |
5562 | &i); | |
5563 | if (error) | |
5564 | goto del_cursor; | |
5565 | XFS_WANT_CORRUPTED_GOTO(i == 1, del_cursor); | |
5566 | } | |
5567 | ||
5568 | xfs_bmbt_set_blockcount(gotp, blockcount); | |
5569 | got.br_blockcount = blockcount; | |
5570 | } else { | |
5571 | /* We have to update the startoff */ | |
5572 | xfs_bmbt_set_startoff(gotp, startoff); | |
5573 | got.br_startoff = startoff; | |
5574 | } | |
5575 | ||
ca446d88 | 5576 | logflags |= XFS_ILOG_CORE; |
e1d8fb88 NJ |
5577 | if (cur) { |
5578 | error = xfs_bmbt_update(cur, got.br_startoff, | |
5579 | got.br_startblock, | |
5580 | got.br_blockcount, | |
5581 | got.br_state); | |
5582 | if (error) | |
5583 | goto del_cursor; | |
ca446d88 BF |
5584 | } else { |
5585 | logflags |= XFS_ILOG_DEXT; | |
e1d8fb88 NJ |
5586 | } |
5587 | ||
5588 | (*current_ext)++; | |
d39a2ced | 5589 | total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); |
e1d8fb88 NJ |
5590 | } |
5591 | ||
5592 | /* Check if we are done */ | |
d39a2ced | 5593 | if (*current_ext == total_extents) |
e1d8fb88 NJ |
5594 | *done = 1; |
5595 | ||
5596 | del_cursor: | |
5597 | if (cur) | |
5598 | xfs_btree_del_cursor(cur, | |
5599 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
5600 | ||
ca446d88 BF |
5601 | if (logflags) |
5602 | xfs_trans_log_inode(tp, ip, logflags); | |
e1d8fb88 NJ |
5603 | return error; |
5604 | } |