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" |
1da177e4 | 25 | #include "xfs_sb.h" |
f5ea1100 | 26 | #include "xfs_mount.h" |
3ab78df2 | 27 | #include "xfs_defer.h" |
57062787 | 28 | #include "xfs_da_format.h" |
a844f451 | 29 | #include "xfs_da_btree.h" |
2b9ab5ab | 30 | #include "xfs_dir2.h" |
1da177e4 | 31 | #include "xfs_inode.h" |
a844f451 | 32 | #include "xfs_btree.h" |
239880ef | 33 | #include "xfs_trans.h" |
a844f451 | 34 | #include "xfs_inode_item.h" |
1da177e4 LT |
35 | #include "xfs_extfree_item.h" |
36 | #include "xfs_alloc.h" | |
37 | #include "xfs_bmap.h" | |
68988114 | 38 | #include "xfs_bmap_util.h" |
a4fbe6ab | 39 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
40 | #include "xfs_rtalloc.h" |
41 | #include "xfs_error.h" | |
1da177e4 LT |
42 | #include "xfs_quota.h" |
43 | #include "xfs_trans_space.h" | |
44 | #include "xfs_buf_item.h" | |
0b1b213f | 45 | #include "xfs_trace.h" |
19de7351 | 46 | #include "xfs_symlink.h" |
a4fbe6ab | 47 | #include "xfs_attr_leaf.h" |
a4fbe6ab | 48 | #include "xfs_filestream.h" |
340785cc | 49 | #include "xfs_rmap.h" |
1da177e4 LT |
50 | |
51 | ||
1da177e4 LT |
52 | kmem_zone_t *xfs_bmap_free_item_zone; |
53 | ||
54 | /* | |
9e5987a7 | 55 | * Miscellaneous helper functions |
1da177e4 LT |
56 | */ |
57 | ||
1da177e4 | 58 | /* |
9e5987a7 DC |
59 | * Compute and fill in the value of the maximum depth of a bmap btree |
60 | * in this filesystem. Done once, during mount. | |
1da177e4 | 61 | */ |
9e5987a7 DC |
62 | void |
63 | xfs_bmap_compute_maxlevels( | |
64 | xfs_mount_t *mp, /* file system mount structure */ | |
65 | int whichfork) /* data or attr fork */ | |
66 | { | |
67 | int level; /* btree level */ | |
68 | uint maxblocks; /* max blocks at this level */ | |
69 | uint maxleafents; /* max leaf entries possible */ | |
70 | int maxrootrecs; /* max records in root block */ | |
71 | int minleafrecs; /* min records in leaf block */ | |
72 | int minnoderecs; /* min records in node block */ | |
73 | int sz; /* root block size */ | |
1da177e4 | 74 | |
9e5987a7 DC |
75 | /* |
76 | * The maximum number of extents in a file, hence the maximum | |
77 | * number of leaf entries, is controlled by the type of di_nextents | |
78 | * (a signed 32-bit number, xfs_extnum_t), or by di_anextents | |
79 | * (a signed 16-bit number, xfs_aextnum_t). | |
80 | * | |
81 | * Note that we can no longer assume that if we are in ATTR1 that | |
82 | * the fork offset of all the inodes will be | |
83 | * (xfs_default_attroffset(ip) >> 3) because we could have mounted | |
84 | * with ATTR2 and then mounted back with ATTR1, keeping the | |
85 | * di_forkoff's fixed but probably at various positions. Therefore, | |
86 | * for both ATTR1 and ATTR2 we have to assume the worst case scenario | |
87 | * of a minimum size available. | |
88 | */ | |
89 | if (whichfork == XFS_DATA_FORK) { | |
90 | maxleafents = MAXEXTNUM; | |
91 | sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS); | |
92 | } else { | |
93 | maxleafents = MAXAEXTNUM; | |
94 | sz = XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
95 | } | |
152d93b7 | 96 | maxrootrecs = xfs_bmdr_maxrecs(sz, 0); |
9e5987a7 DC |
97 | minleafrecs = mp->m_bmap_dmnr[0]; |
98 | minnoderecs = mp->m_bmap_dmnr[1]; | |
99 | maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; | |
100 | for (level = 1; maxblocks > 1; level++) { | |
101 | if (maxblocks <= maxrootrecs) | |
102 | maxblocks = 1; | |
103 | else | |
104 | maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; | |
105 | } | |
106 | mp->m_bm_maxlevels[whichfork] = level; | |
107 | } | |
91e11088 | 108 | |
fe033cc8 CH |
109 | STATIC int /* error */ |
110 | xfs_bmbt_lookup_eq( | |
111 | struct xfs_btree_cur *cur, | |
112 | xfs_fileoff_t off, | |
113 | xfs_fsblock_t bno, | |
114 | xfs_filblks_t len, | |
115 | int *stat) /* success/failure */ | |
116 | { | |
117 | cur->bc_rec.b.br_startoff = off; | |
118 | cur->bc_rec.b.br_startblock = bno; | |
119 | cur->bc_rec.b.br_blockcount = len; | |
120 | return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); | |
121 | } | |
122 | ||
123 | STATIC int /* error */ | |
124 | xfs_bmbt_lookup_ge( | |
125 | struct xfs_btree_cur *cur, | |
126 | xfs_fileoff_t off, | |
127 | xfs_fsblock_t bno, | |
128 | xfs_filblks_t len, | |
129 | int *stat) /* success/failure */ | |
130 | { | |
131 | cur->bc_rec.b.br_startoff = off; | |
132 | cur->bc_rec.b.br_startblock = bno; | |
133 | cur->bc_rec.b.br_blockcount = len; | |
134 | return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); | |
135 | } | |
136 | ||
278d0ca1 | 137 | /* |
8096b1eb CH |
138 | * Check if the inode needs to be converted to btree format. |
139 | */ | |
140 | static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) | |
141 | { | |
142 | return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && | |
143 | XFS_IFORK_NEXTENTS(ip, whichfork) > | |
144 | XFS_IFORK_MAXEXT(ip, whichfork); | |
145 | } | |
146 | ||
147 | /* | |
148 | * Check if the inode should be converted to extent format. | |
149 | */ | |
150 | static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork) | |
151 | { | |
152 | return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && | |
153 | XFS_IFORK_NEXTENTS(ip, whichfork) <= | |
154 | XFS_IFORK_MAXEXT(ip, whichfork); | |
155 | } | |
156 | ||
157 | /* | |
158 | * Update the record referred to by cur to the value given | |
278d0ca1 CH |
159 | * by [off, bno, len, state]. |
160 | * This either works (return 0) or gets an EFSCORRUPTED error. | |
161 | */ | |
162 | STATIC int | |
163 | xfs_bmbt_update( | |
164 | struct xfs_btree_cur *cur, | |
165 | xfs_fileoff_t off, | |
166 | xfs_fsblock_t bno, | |
167 | xfs_filblks_t len, | |
168 | xfs_exntst_t state) | |
169 | { | |
170 | union xfs_btree_rec rec; | |
171 | ||
172 | xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state); | |
173 | return xfs_btree_update(cur, &rec); | |
174 | } | |
fe033cc8 | 175 | |
1da177e4 | 176 | /* |
9e5987a7 DC |
177 | * Compute the worst-case number of indirect blocks that will be used |
178 | * for ip's delayed extent of length "len". | |
1da177e4 | 179 | */ |
9e5987a7 DC |
180 | STATIC xfs_filblks_t |
181 | xfs_bmap_worst_indlen( | |
182 | xfs_inode_t *ip, /* incore inode pointer */ | |
183 | xfs_filblks_t len) /* delayed extent length */ | |
1da177e4 | 184 | { |
9e5987a7 DC |
185 | int level; /* btree level number */ |
186 | int maxrecs; /* maximum record count at this level */ | |
187 | xfs_mount_t *mp; /* mount structure */ | |
188 | xfs_filblks_t rval; /* return value */ | |
1da177e4 LT |
189 | |
190 | mp = ip->i_mount; | |
9e5987a7 DC |
191 | maxrecs = mp->m_bmap_dmxr[0]; |
192 | for (level = 0, rval = 0; | |
193 | level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); | |
194 | level++) { | |
195 | len += maxrecs - 1; | |
196 | do_div(len, maxrecs); | |
197 | rval += len; | |
198 | if (len == 1) | |
199 | return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - | |
200 | level - 1; | |
201 | if (level == 0) | |
202 | maxrecs = mp->m_bmap_dmxr[1]; | |
1da177e4 | 203 | } |
9e5987a7 | 204 | return rval; |
1da177e4 LT |
205 | } |
206 | ||
207 | /* | |
9e5987a7 | 208 | * Calculate the default attribute fork offset for newly created inodes. |
1da177e4 | 209 | */ |
9e5987a7 DC |
210 | uint |
211 | xfs_default_attroffset( | |
212 | struct xfs_inode *ip) | |
1da177e4 | 213 | { |
9e5987a7 DC |
214 | struct xfs_mount *mp = ip->i_mount; |
215 | uint offset; | |
1da177e4 | 216 | |
9e5987a7 | 217 | if (mp->m_sb.sb_inodesize == 256) { |
56cea2d0 | 218 | offset = XFS_LITINO(mp, ip->i_d.di_version) - |
9e5987a7 DC |
219 | XFS_BMDR_SPACE_CALC(MINABTPTRS); |
220 | } else { | |
221 | offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); | |
1da177e4 | 222 | } |
9e5987a7 | 223 | |
56cea2d0 | 224 | ASSERT(offset < XFS_LITINO(mp, ip->i_d.di_version)); |
9e5987a7 | 225 | return offset; |
1da177e4 LT |
226 | } |
227 | ||
228 | /* | |
9e5987a7 DC |
229 | * Helper routine to reset inode di_forkoff field when switching |
230 | * attribute fork from local to extent format - we reset it where | |
231 | * possible to make space available for inline data fork extents. | |
1e82379b DC |
232 | */ |
233 | STATIC void | |
9e5987a7 | 234 | xfs_bmap_forkoff_reset( |
9e5987a7 DC |
235 | xfs_inode_t *ip, |
236 | int whichfork) | |
1e82379b | 237 | { |
9e5987a7 DC |
238 | if (whichfork == XFS_ATTR_FORK && |
239 | ip->i_d.di_format != XFS_DINODE_FMT_DEV && | |
240 | ip->i_d.di_format != XFS_DINODE_FMT_UUID && | |
241 | ip->i_d.di_format != XFS_DINODE_FMT_BTREE) { | |
242 | uint dfl_forkoff = xfs_default_attroffset(ip) >> 3; | |
243 | ||
244 | if (dfl_forkoff > ip->i_d.di_forkoff) | |
245 | ip->i_d.di_forkoff = dfl_forkoff; | |
246 | } | |
1e82379b DC |
247 | } |
248 | ||
9e5987a7 DC |
249 | #ifdef DEBUG |
250 | STATIC struct xfs_buf * | |
251 | xfs_bmap_get_bp( | |
252 | struct xfs_btree_cur *cur, | |
253 | xfs_fsblock_t bno) | |
254 | { | |
255 | struct xfs_log_item_desc *lidp; | |
256 | int i; | |
7574aa92 | 257 | |
9e5987a7 DC |
258 | if (!cur) |
259 | return NULL; | |
260 | ||
261 | for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { | |
262 | if (!cur->bc_bufs[i]) | |
263 | break; | |
264 | if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) | |
265 | return cur->bc_bufs[i]; | |
1da177e4 | 266 | } |
7574aa92 | 267 | |
9e5987a7 DC |
268 | /* Chase down all the log items to see if the bp is there */ |
269 | list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) { | |
270 | struct xfs_buf_log_item *bip; | |
271 | bip = (struct xfs_buf_log_item *)lidp->lid_item; | |
272 | if (bip->bli_item.li_type == XFS_LI_BUF && | |
273 | XFS_BUF_ADDR(bip->bli_buf) == bno) | |
274 | return bip->bli_buf; | |
275 | } | |
7574aa92 | 276 | |
9e5987a7 DC |
277 | return NULL; |
278 | } | |
0b1b213f | 279 | |
9e5987a7 DC |
280 | STATIC void |
281 | xfs_check_block( | |
282 | struct xfs_btree_block *block, | |
283 | xfs_mount_t *mp, | |
284 | int root, | |
285 | short sz) | |
286 | { | |
287 | int i, j, dmxr; | |
288 | __be64 *pp, *thispa; /* pointer to block address */ | |
289 | xfs_bmbt_key_t *prevp, *keyp; | |
1da177e4 | 290 | |
9e5987a7 | 291 | ASSERT(be16_to_cpu(block->bb_level) > 0); |
ec90c556 | 292 | |
9e5987a7 DC |
293 | prevp = NULL; |
294 | for( i = 1; i <= xfs_btree_get_numrecs(block); i++) { | |
295 | dmxr = mp->m_bmap_dmxr[0]; | |
296 | keyp = XFS_BMBT_KEY_ADDR(mp, block, i); | |
0b1b213f | 297 | |
9e5987a7 DC |
298 | if (prevp) { |
299 | ASSERT(be64_to_cpu(prevp->br_startoff) < | |
300 | be64_to_cpu(keyp->br_startoff)); | |
1da177e4 | 301 | } |
9e5987a7 | 302 | prevp = keyp; |
1da177e4 | 303 | |
1da177e4 | 304 | /* |
9e5987a7 | 305 | * Compare the block numbers to see if there are dups. |
1da177e4 | 306 | */ |
9e5987a7 DC |
307 | if (root) |
308 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz); | |
309 | else | |
310 | pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr); | |
0b1b213f | 311 | |
9e5987a7 DC |
312 | for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { |
313 | if (root) | |
314 | thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz); | |
315 | else | |
316 | thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr); | |
317 | if (*thispa == *pp) { | |
318 | xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld", | |
319 | __func__, j, i, | |
320 | (unsigned long long)be64_to_cpu(*thispa)); | |
321 | panic("%s: ptrs are equal in node\n", | |
322 | __func__); | |
323 | } | |
1da177e4 | 324 | } |
9e5987a7 DC |
325 | } |
326 | } | |
1da177e4 | 327 | |
9e5987a7 DC |
328 | /* |
329 | * Check that the extents for the inode ip are in the right order in all | |
e3543819 DC |
330 | * btree leaves. THis becomes prohibitively expensive for large extent count |
331 | * files, so don't bother with inodes that have more than 10,000 extents in | |
332 | * them. The btree record ordering checks will still be done, so for such large | |
333 | * bmapbt constructs that is going to catch most corruptions. | |
9e5987a7 | 334 | */ |
9e5987a7 DC |
335 | STATIC void |
336 | xfs_bmap_check_leaf_extents( | |
337 | xfs_btree_cur_t *cur, /* btree cursor or null */ | |
338 | xfs_inode_t *ip, /* incore inode pointer */ | |
339 | int whichfork) /* data or attr fork */ | |
340 | { | |
341 | struct xfs_btree_block *block; /* current btree block */ | |
342 | xfs_fsblock_t bno; /* block # of "block" */ | |
343 | xfs_buf_t *bp; /* buffer for "block" */ | |
344 | int error; /* error return value */ | |
345 | xfs_extnum_t i=0, j; /* index into the extents list */ | |
346 | xfs_ifork_t *ifp; /* fork structure */ | |
347 | int level; /* btree level, for checking */ | |
348 | xfs_mount_t *mp; /* file system mount structure */ | |
349 | __be64 *pp; /* pointer to block address */ | |
350 | xfs_bmbt_rec_t *ep; /* pointer to current extent */ | |
351 | xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */ | |
352 | xfs_bmbt_rec_t *nextp; /* pointer to next extent */ | |
353 | int bp_release = 0; | |
354 | ||
355 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) { | |
356 | return; | |
357 | } | |
358 | ||
e3543819 DC |
359 | /* skip large extent count inodes */ |
360 | if (ip->i_d.di_nextents > 10000) | |
361 | return; | |
362 | ||
9e5987a7 DC |
363 | bno = NULLFSBLOCK; |
364 | mp = ip->i_mount; | |
365 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
366 | block = ifp->if_broot; | |
367 | /* | |
368 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. | |
369 | */ | |
370 | level = be16_to_cpu(block->bb_level); | |
371 | ASSERT(level > 0); | |
372 | xfs_check_block(block, mp, 1, ifp->if_broot_bytes); | |
373 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); | |
374 | bno = be64_to_cpu(*pp); | |
375 | ||
d5cf09ba | 376 | ASSERT(bno != NULLFSBLOCK); |
9e5987a7 DC |
377 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
378 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
379 | ||
380 | /* | |
381 | * Go down the tree until leaf level is reached, following the first | |
382 | * pointer (leftmost) at each level. | |
383 | */ | |
384 | while (level-- > 0) { | |
385 | /* See if buf is in cur first */ | |
386 | bp_release = 0; | |
387 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
388 | if (!bp) { | |
389 | bp_release = 1; | |
390 | error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
391 | XFS_BMAP_BTREE_REF, | |
392 | &xfs_bmbt_buf_ops); | |
572a4cf0 | 393 | if (error) |
9e5987a7 | 394 | goto error_norelse; |
1da177e4 | 395 | } |
9e5987a7 | 396 | block = XFS_BUF_TO_BLOCK(bp); |
9e5987a7 DC |
397 | if (level == 0) |
398 | break; | |
1da177e4 | 399 | |
1da177e4 | 400 | /* |
9e5987a7 DC |
401 | * Check this block for basic sanity (increasing keys and |
402 | * no duplicate blocks). | |
1da177e4 | 403 | */ |
0b1b213f | 404 | |
9e5987a7 DC |
405 | xfs_check_block(block, mp, 0, 0); |
406 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); | |
407 | bno = be64_to_cpu(*pp); | |
c29aad41 ES |
408 | XFS_WANT_CORRUPTED_GOTO(mp, |
409 | XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
9e5987a7 DC |
410 | if (bp_release) { |
411 | bp_release = 0; | |
412 | xfs_trans_brelse(NULL, bp); | |
1da177e4 | 413 | } |
9e5987a7 | 414 | } |
ec90c556 | 415 | |
9e5987a7 DC |
416 | /* |
417 | * Here with bp and block set to the leftmost leaf node in the tree. | |
418 | */ | |
419 | i = 0; | |
420 | ||
421 | /* | |
422 | * Loop over all leaf nodes checking that all extents are in the right order. | |
423 | */ | |
424 | for (;;) { | |
425 | xfs_fsblock_t nextbno; | |
426 | xfs_extnum_t num_recs; | |
427 | ||
428 | ||
429 | num_recs = xfs_btree_get_numrecs(block); | |
1da177e4 | 430 | |
1da177e4 | 431 | /* |
9e5987a7 | 432 | * Read-ahead the next leaf block, if any. |
1da177e4 | 433 | */ |
8096b1eb | 434 | |
9e5987a7 | 435 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1da177e4 | 436 | |
1da177e4 | 437 | /* |
9e5987a7 DC |
438 | * Check all the extents to make sure they are OK. |
439 | * If we had a previous block, the last entry should | |
440 | * conform with the first entry in this one. | |
1da177e4 | 441 | */ |
ec90c556 | 442 | |
9e5987a7 DC |
443 | ep = XFS_BMBT_REC_ADDR(mp, block, 1); |
444 | if (i) { | |
445 | ASSERT(xfs_bmbt_disk_get_startoff(&last) + | |
446 | xfs_bmbt_disk_get_blockcount(&last) <= | |
447 | xfs_bmbt_disk_get_startoff(ep)); | |
448 | } | |
449 | for (j = 1; j < num_recs; j++) { | |
450 | nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1); | |
451 | ASSERT(xfs_bmbt_disk_get_startoff(ep) + | |
452 | xfs_bmbt_disk_get_blockcount(ep) <= | |
453 | xfs_bmbt_disk_get_startoff(nextp)); | |
454 | ep = nextp; | |
455 | } | |
1da177e4 | 456 | |
9e5987a7 DC |
457 | last = *ep; |
458 | i += num_recs; | |
459 | if (bp_release) { | |
460 | bp_release = 0; | |
461 | xfs_trans_brelse(NULL, bp); | |
462 | } | |
463 | bno = nextbno; | |
1da177e4 | 464 | /* |
9e5987a7 | 465 | * If we've reached the end, stop. |
1da177e4 | 466 | */ |
9e5987a7 DC |
467 | if (bno == NULLFSBLOCK) |
468 | break; | |
8096b1eb | 469 | |
9e5987a7 DC |
470 | bp_release = 0; |
471 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
472 | if (!bp) { | |
473 | bp_release = 1; | |
474 | error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
475 | XFS_BMAP_BTREE_REF, | |
476 | &xfs_bmbt_buf_ops); | |
b9b984d7 | 477 | if (error) |
9e5987a7 | 478 | goto error_norelse; |
1da177e4 | 479 | } |
9e5987a7 | 480 | block = XFS_BUF_TO_BLOCK(bp); |
a5bd606b | 481 | } |
a5fd276b | 482 | |
9e5987a7 | 483 | return; |
a5bd606b | 484 | |
9e5987a7 DC |
485 | error0: |
486 | xfs_warn(mp, "%s: at error0", __func__); | |
487 | if (bp_release) | |
488 | xfs_trans_brelse(NULL, bp); | |
489 | error_norelse: | |
490 | xfs_warn(mp, "%s: BAD after btree leaves for %d extents", | |
491 | __func__, i); | |
492 | panic("%s: CORRUPTED BTREE OR SOMETHING", __func__); | |
493 | return; | |
1da177e4 LT |
494 | } |
495 | ||
496 | /* | |
9e5987a7 | 497 | * Add bmap trace insert entries for all the contents of the extent records. |
1da177e4 | 498 | */ |
9e5987a7 DC |
499 | void |
500 | xfs_bmap_trace_exlist( | |
501 | xfs_inode_t *ip, /* incore inode pointer */ | |
502 | xfs_extnum_t cnt, /* count of entries in the list */ | |
503 | int whichfork, /* data or attr fork */ | |
504 | unsigned long caller_ip) | |
1da177e4 | 505 | { |
9e5987a7 DC |
506 | xfs_extnum_t idx; /* extent record index */ |
507 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
508 | int state = 0; | |
a5bd606b | 509 | |
9e5987a7 DC |
510 | if (whichfork == XFS_ATTR_FORK) |
511 | state |= BMAP_ATTRFORK; | |
a5bd606b | 512 | |
9e5987a7 DC |
513 | ifp = XFS_IFORK_PTR(ip, whichfork); |
514 | ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); | |
515 | for (idx = 0; idx < cnt; idx++) | |
516 | trace_xfs_extlist(ip, idx, whichfork, caller_ip); | |
517 | } | |
a5bd606b | 518 | |
9e5987a7 DC |
519 | /* |
520 | * Validate that the bmbt_irecs being returned from bmapi are valid | |
a97f4df7 ZYW |
521 | * given the caller's original parameters. Specifically check the |
522 | * ranges of the returned irecs to ensure that they only extend beyond | |
9e5987a7 DC |
523 | * the given parameters if the XFS_BMAPI_ENTIRE flag was set. |
524 | */ | |
525 | STATIC void | |
526 | xfs_bmap_validate_ret( | |
527 | xfs_fileoff_t bno, | |
528 | xfs_filblks_t len, | |
529 | int flags, | |
530 | xfs_bmbt_irec_t *mval, | |
531 | int nmap, | |
532 | int ret_nmap) | |
533 | { | |
534 | int i; /* index to map values */ | |
a5bd606b | 535 | |
9e5987a7 | 536 | ASSERT(ret_nmap <= nmap); |
a5bd606b | 537 | |
9e5987a7 DC |
538 | for (i = 0; i < ret_nmap; i++) { |
539 | ASSERT(mval[i].br_blockcount > 0); | |
540 | if (!(flags & XFS_BMAPI_ENTIRE)) { | |
541 | ASSERT(mval[i].br_startoff >= bno); | |
542 | ASSERT(mval[i].br_blockcount <= len); | |
543 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= | |
544 | bno + len); | |
545 | } else { | |
546 | ASSERT(mval[i].br_startoff < bno + len); | |
547 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount > | |
548 | bno); | |
549 | } | |
550 | ASSERT(i == 0 || | |
551 | mval[i - 1].br_startoff + mval[i - 1].br_blockcount == | |
552 | mval[i].br_startoff); | |
553 | ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && | |
554 | mval[i].br_startblock != HOLESTARTBLOCK); | |
555 | ASSERT(mval[i].br_state == XFS_EXT_NORM || | |
556 | mval[i].br_state == XFS_EXT_UNWRITTEN); | |
557 | } | |
558 | } | |
7574aa92 | 559 | |
9e5987a7 DC |
560 | #else |
561 | #define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0) | |
562 | #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) | |
563 | #endif /* DEBUG */ | |
7574aa92 | 564 | |
9e5987a7 DC |
565 | /* |
566 | * bmap free list manipulation functions | |
567 | */ | |
7574aa92 | 568 | |
9e5987a7 DC |
569 | /* |
570 | * Add the extent to the list of extents to be free at transaction end. | |
571 | * The list is maintained sorted (by block number). | |
572 | */ | |
573 | void | |
574 | xfs_bmap_add_free( | |
340785cc DW |
575 | struct xfs_mount *mp, |
576 | struct xfs_defer_ops *dfops, | |
577 | xfs_fsblock_t bno, | |
578 | xfs_filblks_t len, | |
579 | struct xfs_owner_info *oinfo) | |
9e5987a7 | 580 | { |
310a75a3 | 581 | struct xfs_extent_free_item *new; /* new element */ |
9e5987a7 DC |
582 | #ifdef DEBUG |
583 | xfs_agnumber_t agno; | |
584 | xfs_agblock_t agbno; | |
585 | ||
586 | ASSERT(bno != NULLFSBLOCK); | |
587 | ASSERT(len > 0); | |
588 | ASSERT(len <= MAXEXTLEN); | |
589 | ASSERT(!isnullstartblock(bno)); | |
590 | agno = XFS_FSB_TO_AGNO(mp, bno); | |
591 | agbno = XFS_FSB_TO_AGBNO(mp, bno); | |
592 | ASSERT(agno < mp->m_sb.sb_agcount); | |
593 | ASSERT(agbno < mp->m_sb.sb_agblocks); | |
594 | ASSERT(len < mp->m_sb.sb_agblocks); | |
595 | ASSERT(agbno + len <= mp->m_sb.sb_agblocks); | |
596 | #endif | |
597 | ASSERT(xfs_bmap_free_item_zone != NULL); | |
340785cc | 598 | |
9e5987a7 | 599 | new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP); |
310a75a3 DW |
600 | new->xefi_startblock = bno; |
601 | new->xefi_blockcount = (xfs_extlen_t)len; | |
340785cc DW |
602 | if (oinfo) |
603 | new->xefi_oinfo = *oinfo; | |
604 | else | |
605 | xfs_rmap_skip_owner_update(&new->xefi_oinfo); | |
ba9e7802 DW |
606 | trace_xfs_bmap_free_defer(mp, XFS_FSB_TO_AGNO(mp, bno), 0, |
607 | XFS_FSB_TO_AGBNO(mp, bno), len); | |
2c3234d1 | 608 | xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_FREE, &new->xefi_list); |
9e5987a7 | 609 | } |
0b1b213f | 610 | |
9e5987a7 DC |
611 | /* |
612 | * Inode fork format manipulation functions | |
613 | */ | |
1da177e4 | 614 | |
9e5987a7 DC |
615 | /* |
616 | * Transform a btree format file with only one leaf node, where the | |
617 | * extents list will fit in the inode, into an extents format file. | |
618 | * Since the file extents are already in-core, all we have to do is | |
619 | * give up the space for the btree root and pitch the leaf block. | |
620 | */ | |
621 | STATIC int /* error */ | |
622 | xfs_bmap_btree_to_extents( | |
623 | xfs_trans_t *tp, /* transaction pointer */ | |
624 | xfs_inode_t *ip, /* incore inode pointer */ | |
625 | xfs_btree_cur_t *cur, /* btree cursor */ | |
626 | int *logflagsp, /* inode logging flags */ | |
627 | int whichfork) /* data or attr fork */ | |
628 | { | |
629 | /* REFERENCED */ | |
630 | struct xfs_btree_block *cblock;/* child btree block */ | |
631 | xfs_fsblock_t cbno; /* child block number */ | |
632 | xfs_buf_t *cbp; /* child block's buffer */ | |
633 | int error; /* error return value */ | |
634 | xfs_ifork_t *ifp; /* inode fork data */ | |
635 | xfs_mount_t *mp; /* mount point structure */ | |
636 | __be64 *pp; /* ptr to block address */ | |
637 | struct xfs_btree_block *rblock;/* root btree block */ | |
340785cc | 638 | struct xfs_owner_info oinfo; |
1da177e4 | 639 | |
9e5987a7 DC |
640 | mp = ip->i_mount; |
641 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
642 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
643 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
644 | rblock = ifp->if_broot; | |
645 | ASSERT(be16_to_cpu(rblock->bb_level) == 1); | |
646 | ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); | |
647 | ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1); | |
648 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes); | |
649 | cbno = be64_to_cpu(*pp); | |
650 | *logflagsp = 0; | |
651 | #ifdef DEBUG | |
652 | if ((error = xfs_btree_check_lptr(cur, cbno, 1))) | |
653 | return error; | |
654 | #endif | |
655 | error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF, | |
656 | &xfs_bmbt_buf_ops); | |
657 | if (error) | |
658 | return error; | |
659 | cblock = XFS_BUF_TO_BLOCK(cbp); | |
660 | if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) | |
661 | return error; | |
340785cc DW |
662 | xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, whichfork); |
663 | xfs_bmap_add_free(mp, cur->bc_private.b.dfops, cbno, 1, &oinfo); | |
9e5987a7 DC |
664 | ip->i_d.di_nblocks--; |
665 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); | |
666 | xfs_trans_binval(tp, cbp); | |
667 | if (cur->bc_bufs[0] == cbp) | |
668 | cur->bc_bufs[0] = NULL; | |
669 | xfs_iroot_realloc(ip, -1, whichfork); | |
670 | ASSERT(ifp->if_broot == NULL); | |
671 | ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); | |
672 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
673 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
674 | return 0; | |
675 | } | |
0b1b213f | 676 | |
9e5987a7 DC |
677 | /* |
678 | * Convert an extents-format file into a btree-format file. | |
679 | * The new file will have a root block (in the inode) and a single child block. | |
680 | */ | |
681 | STATIC int /* error */ | |
682 | xfs_bmap_extents_to_btree( | |
683 | xfs_trans_t *tp, /* transaction pointer */ | |
684 | xfs_inode_t *ip, /* incore inode pointer */ | |
685 | xfs_fsblock_t *firstblock, /* first-block-allocated */ | |
2c3234d1 | 686 | struct xfs_defer_ops *dfops, /* blocks freed in xaction */ |
9e5987a7 DC |
687 | xfs_btree_cur_t **curp, /* cursor returned to caller */ |
688 | int wasdel, /* converting a delayed alloc */ | |
689 | int *logflagsp, /* inode logging flags */ | |
690 | int whichfork) /* data or attr fork */ | |
691 | { | |
692 | struct xfs_btree_block *ablock; /* allocated (child) bt block */ | |
693 | xfs_buf_t *abp; /* buffer for ablock */ | |
694 | xfs_alloc_arg_t args; /* allocation arguments */ | |
695 | xfs_bmbt_rec_t *arp; /* child record pointer */ | |
696 | struct xfs_btree_block *block; /* btree root block */ | |
697 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
698 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
699 | int error; /* error return value */ | |
700 | xfs_extnum_t i, cnt; /* extent record index */ | |
701 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
702 | xfs_bmbt_key_t *kp; /* root block key pointer */ | |
703 | xfs_mount_t *mp; /* mount structure */ | |
704 | xfs_extnum_t nextents; /* number of file extents */ | |
705 | xfs_bmbt_ptr_t *pp; /* root block address pointer */ | |
1da177e4 | 706 | |
ee1a47ab | 707 | mp = ip->i_mount; |
9e5987a7 DC |
708 | ifp = XFS_IFORK_PTR(ip, whichfork); |
709 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); | |
0b1b213f | 710 | |
9e5987a7 DC |
711 | /* |
712 | * Make space in the inode incore. | |
713 | */ | |
714 | xfs_iroot_realloc(ip, 1, whichfork); | |
715 | ifp->if_flags |= XFS_IFBROOT; | |
ec90c556 | 716 | |
9e5987a7 DC |
717 | /* |
718 | * Fill in the root. | |
719 | */ | |
720 | block = ifp->if_broot; | |
ee1a47ab CH |
721 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
722 | xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, | |
723 | XFS_BMAP_CRC_MAGIC, 1, 1, ip->i_ino, | |
724 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
725 | else | |
726 | xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, | |
727 | XFS_BMAP_MAGIC, 1, 1, ip->i_ino, | |
728 | XFS_BTREE_LONG_PTRS); | |
0b1b213f | 729 | |
9e5987a7 DC |
730 | /* |
731 | * Need a cursor. Can't allocate until bb_level is filled in. | |
732 | */ | |
9e5987a7 DC |
733 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); |
734 | cur->bc_private.b.firstblock = *firstblock; | |
2c3234d1 | 735 | cur->bc_private.b.dfops = dfops; |
9e5987a7 DC |
736 | cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; |
737 | /* | |
738 | * Convert to a btree with two levels, one record in root. | |
739 | */ | |
740 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); | |
741 | memset(&args, 0, sizeof(args)); | |
742 | args.tp = tp; | |
743 | args.mp = mp; | |
340785cc | 744 | xfs_rmap_ino_bmbt_owner(&args.oinfo, ip->i_ino, whichfork); |
9e5987a7 DC |
745 | args.firstblock = *firstblock; |
746 | if (*firstblock == NULLFSBLOCK) { | |
747 | args.type = XFS_ALLOCTYPE_START_BNO; | |
748 | args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); | |
2c3234d1 | 749 | } else if (dfops->dop_low) { |
9e5987a7 DC |
750 | args.type = XFS_ALLOCTYPE_START_BNO; |
751 | args.fsbno = *firstblock; | |
752 | } else { | |
753 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
754 | args.fsbno = *firstblock; | |
755 | } | |
756 | args.minlen = args.maxlen = args.prod = 1; | |
757 | args.wasdel = wasdel; | |
758 | *logflagsp = 0; | |
759 | if ((error = xfs_alloc_vextent(&args))) { | |
760 | xfs_iroot_realloc(ip, -1, whichfork); | |
761 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
762 | return error; | |
763 | } | |
764 | /* | |
765 | * Allocation can't fail, the space was reserved. | |
766 | */ | |
767 | ASSERT(args.fsbno != NULLFSBLOCK); | |
768 | ASSERT(*firstblock == NULLFSBLOCK || | |
769 | args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) || | |
2c3234d1 | 770 | (dfops->dop_low && |
9e5987a7 DC |
771 | args.agno > XFS_FSB_TO_AGNO(mp, *firstblock))); |
772 | *firstblock = cur->bc_private.b.firstblock = args.fsbno; | |
773 | cur->bc_private.b.allocated++; | |
774 | ip->i_d.di_nblocks++; | |
775 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); | |
776 | abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0); | |
777 | /* | |
778 | * Fill in the child block. | |
779 | */ | |
780 | abp->b_ops = &xfs_bmbt_buf_ops; | |
781 | ablock = XFS_BUF_TO_BLOCK(abp); | |
ee1a47ab CH |
782 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
783 | xfs_btree_init_block_int(mp, ablock, abp->b_bn, | |
784 | XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino, | |
785 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
786 | else | |
787 | xfs_btree_init_block_int(mp, ablock, abp->b_bn, | |
788 | XFS_BMAP_MAGIC, 0, 0, ip->i_ino, | |
789 | XFS_BTREE_LONG_PTRS); | |
790 | ||
9e5987a7 DC |
791 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); |
792 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
793 | for (cnt = i = 0; i < nextents; i++) { | |
794 | ep = xfs_iext_get_ext(ifp, i); | |
795 | if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) { | |
796 | arp->l0 = cpu_to_be64(ep->l0); | |
797 | arp->l1 = cpu_to_be64(ep->l1); | |
798 | arp++; cnt++; | |
1da177e4 | 799 | } |
9e5987a7 DC |
800 | } |
801 | ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork)); | |
802 | xfs_btree_set_numrecs(ablock, cnt); | |
1da177e4 | 803 | |
9e5987a7 DC |
804 | /* |
805 | * Fill in the root key and pointer. | |
806 | */ | |
807 | kp = XFS_BMBT_KEY_ADDR(mp, block, 1); | |
808 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); | |
809 | kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp)); | |
810 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur, | |
811 | be16_to_cpu(block->bb_level))); | |
812 | *pp = cpu_to_be64(args.fsbno); | |
ec90c556 | 813 | |
9e5987a7 DC |
814 | /* |
815 | * Do all this logging at the end so that | |
816 | * the root is at the right level. | |
817 | */ | |
818 | xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS); | |
819 | xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); | |
820 | ASSERT(*curp == NULL); | |
821 | *curp = cur; | |
822 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork); | |
823 | return 0; | |
824 | } | |
ec90c556 | 825 | |
9e5987a7 DC |
826 | /* |
827 | * Convert a local file to an extents file. | |
828 | * This code is out of bounds for data forks of regular files, | |
829 | * since the file data needs to get logged so things will stay consistent. | |
830 | * (The bmap-level manipulations are ok, though). | |
831 | */ | |
f3508bcd DC |
832 | void |
833 | xfs_bmap_local_to_extents_empty( | |
834 | struct xfs_inode *ip, | |
835 | int whichfork) | |
836 | { | |
837 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
838 | ||
839 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
840 | ASSERT(ifp->if_bytes == 0); | |
841 | ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); | |
842 | ||
6a9edd3d | 843 | xfs_bmap_forkoff_reset(ip, whichfork); |
f3508bcd DC |
844 | ifp->if_flags &= ~XFS_IFINLINE; |
845 | ifp->if_flags |= XFS_IFEXTENTS; | |
846 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
847 | } | |
848 | ||
849 | ||
9e5987a7 DC |
850 | STATIC int /* error */ |
851 | xfs_bmap_local_to_extents( | |
852 | xfs_trans_t *tp, /* transaction pointer */ | |
853 | xfs_inode_t *ip, /* incore inode pointer */ | |
854 | xfs_fsblock_t *firstblock, /* first block allocated in xaction */ | |
855 | xfs_extlen_t total, /* total blocks needed by transaction */ | |
856 | int *logflagsp, /* inode logging flags */ | |
857 | int whichfork, | |
ee1a47ab CH |
858 | void (*init_fn)(struct xfs_trans *tp, |
859 | struct xfs_buf *bp, | |
9e5987a7 DC |
860 | struct xfs_inode *ip, |
861 | struct xfs_ifork *ifp)) | |
862 | { | |
f3508bcd | 863 | int error = 0; |
9e5987a7 DC |
864 | int flags; /* logging flags returned */ |
865 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
f3508bcd DC |
866 | xfs_alloc_arg_t args; /* allocation arguments */ |
867 | xfs_buf_t *bp; /* buffer for extent block */ | |
868 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
0b1b213f | 869 | |
9e5987a7 DC |
870 | /* |
871 | * We don't want to deal with the case of keeping inode data inline yet. | |
872 | * So sending the data fork of a regular inode is invalid. | |
873 | */ | |
c19b3b05 | 874 | ASSERT(!(S_ISREG(VFS_I(ip)->i_mode) && whichfork == XFS_DATA_FORK)); |
9e5987a7 DC |
875 | ifp = XFS_IFORK_PTR(ip, whichfork); |
876 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
f3508bcd DC |
877 | |
878 | if (!ifp->if_bytes) { | |
879 | xfs_bmap_local_to_extents_empty(ip, whichfork); | |
880 | flags = XFS_ILOG_CORE; | |
881 | goto done; | |
882 | } | |
883 | ||
9e5987a7 DC |
884 | flags = 0; |
885 | error = 0; | |
f3508bcd DC |
886 | ASSERT((ifp->if_flags & (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == |
887 | XFS_IFINLINE); | |
888 | memset(&args, 0, sizeof(args)); | |
889 | args.tp = tp; | |
890 | args.mp = ip->i_mount; | |
340785cc | 891 | xfs_rmap_ino_owner(&args.oinfo, ip->i_ino, whichfork, 0); |
f3508bcd DC |
892 | args.firstblock = *firstblock; |
893 | /* | |
894 | * Allocate a block. We know we need only one, since the | |
895 | * file currently fits in an inode. | |
896 | */ | |
897 | if (*firstblock == NULLFSBLOCK) { | |
898 | args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); | |
899 | args.type = XFS_ALLOCTYPE_START_BNO; | |
9e5987a7 | 900 | } else { |
f3508bcd DC |
901 | args.fsbno = *firstblock; |
902 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
9e5987a7 | 903 | } |
f3508bcd DC |
904 | args.total = total; |
905 | args.minlen = args.maxlen = args.prod = 1; | |
906 | error = xfs_alloc_vextent(&args); | |
907 | if (error) | |
908 | goto done; | |
909 | ||
910 | /* Can't fail, the space was reserved. */ | |
911 | ASSERT(args.fsbno != NULLFSBLOCK); | |
912 | ASSERT(args.len == 1); | |
913 | *firstblock = args.fsbno; | |
914 | bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); | |
915 | ||
fe22d552 | 916 | /* |
b7cdc66b | 917 | * Initialize the block, copy the data and log the remote buffer. |
fe22d552 | 918 | * |
b7cdc66b BF |
919 | * The callout is responsible for logging because the remote format |
920 | * might differ from the local format and thus we don't know how much to | |
921 | * log here. Note that init_fn must also set the buffer log item type | |
922 | * correctly. | |
fe22d552 | 923 | */ |
f3508bcd DC |
924 | init_fn(tp, bp, ip, ifp); |
925 | ||
b7cdc66b | 926 | /* account for the change in fork size */ |
f3508bcd DC |
927 | xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); |
928 | xfs_bmap_local_to_extents_empty(ip, whichfork); | |
9e5987a7 | 929 | flags |= XFS_ILOG_CORE; |
f3508bcd DC |
930 | |
931 | xfs_iext_add(ifp, 0, 1); | |
932 | ep = xfs_iext_get_ext(ifp, 0); | |
933 | xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM); | |
934 | trace_xfs_bmap_post_update(ip, 0, | |
935 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0, | |
936 | _THIS_IP_); | |
937 | XFS_IFORK_NEXT_SET(ip, whichfork, 1); | |
938 | ip->i_d.di_nblocks = 1; | |
939 | xfs_trans_mod_dquot_byino(tp, ip, | |
940 | XFS_TRANS_DQ_BCOUNT, 1L); | |
941 | flags |= xfs_ilog_fext(whichfork); | |
942 | ||
9e5987a7 DC |
943 | done: |
944 | *logflagsp = flags; | |
945 | return error; | |
946 | } | |
ec90c556 | 947 | |
9e5987a7 DC |
948 | /* |
949 | * Called from xfs_bmap_add_attrfork to handle btree format files. | |
950 | */ | |
951 | STATIC int /* error */ | |
952 | xfs_bmap_add_attrfork_btree( | |
953 | xfs_trans_t *tp, /* transaction pointer */ | |
954 | xfs_inode_t *ip, /* incore inode pointer */ | |
955 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
2c3234d1 | 956 | struct xfs_defer_ops *dfops, /* blocks to free at commit */ |
9e5987a7 DC |
957 | int *flags) /* inode logging flags */ |
958 | { | |
959 | xfs_btree_cur_t *cur; /* btree cursor */ | |
960 | int error; /* error return value */ | |
961 | xfs_mount_t *mp; /* file system mount struct */ | |
962 | int stat; /* newroot status */ | |
ec90c556 | 963 | |
9e5987a7 DC |
964 | mp = ip->i_mount; |
965 | if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip)) | |
966 | *flags |= XFS_ILOG_DBROOT; | |
967 | else { | |
968 | cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); | |
2c3234d1 | 969 | cur->bc_private.b.dfops = dfops; |
9e5987a7 DC |
970 | cur->bc_private.b.firstblock = *firstblock; |
971 | if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat))) | |
972 | goto error0; | |
973 | /* must be at least one entry */ | |
c29aad41 | 974 | XFS_WANT_CORRUPTED_GOTO(mp, stat == 1, error0); |
9e5987a7 DC |
975 | if ((error = xfs_btree_new_iroot(cur, flags, &stat))) |
976 | goto error0; | |
977 | if (stat == 0) { | |
978 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
2451337d | 979 | return -ENOSPC; |
1da177e4 | 980 | } |
9e5987a7 DC |
981 | *firstblock = cur->bc_private.b.firstblock; |
982 | cur->bc_private.b.allocated = 0; | |
983 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
1da177e4 | 984 | } |
9e5987a7 DC |
985 | return 0; |
986 | error0: | |
987 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
988 | return error; | |
989 | } | |
a5bd606b | 990 | |
9e5987a7 DC |
991 | /* |
992 | * Called from xfs_bmap_add_attrfork to handle extents format files. | |
993 | */ | |
994 | STATIC int /* error */ | |
995 | xfs_bmap_add_attrfork_extents( | |
996 | xfs_trans_t *tp, /* transaction pointer */ | |
997 | xfs_inode_t *ip, /* incore inode pointer */ | |
998 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
2c3234d1 | 999 | struct xfs_defer_ops *dfops, /* blocks to free at commit */ |
9e5987a7 DC |
1000 | int *flags) /* inode logging flags */ |
1001 | { | |
1002 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
1003 | int error; /* error return value */ | |
a5bd606b | 1004 | |
9e5987a7 DC |
1005 | if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip)) |
1006 | return 0; | |
1007 | cur = NULL; | |
2c3234d1 | 1008 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, &cur, 0, |
9e5987a7 | 1009 | flags, XFS_DATA_FORK); |
a5bd606b CH |
1010 | if (cur) { |
1011 | cur->bc_private.b.allocated = 0; | |
9e5987a7 DC |
1012 | xfs_btree_del_cursor(cur, |
1013 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
a5bd606b | 1014 | } |
1da177e4 | 1015 | return error; |
1da177e4 LT |
1016 | } |
1017 | ||
9e5987a7 DC |
1018 | /* |
1019 | * Called from xfs_bmap_add_attrfork to handle local format files. Each | |
1020 | * different data fork content type needs a different callout to do the | |
1021 | * conversion. Some are basic and only require special block initialisation | |
1022 | * callouts for the data formating, others (directories) are so specialised they | |
1023 | * handle everything themselves. | |
1024 | * | |
1025 | * XXX (dgc): investigate whether directory conversion can use the generic | |
1026 | * formatting callout. It should be possible - it's just a very complex | |
ee1a47ab | 1027 | * formatter. |
9e5987a7 DC |
1028 | */ |
1029 | STATIC int /* error */ | |
1030 | xfs_bmap_add_attrfork_local( | |
1031 | xfs_trans_t *tp, /* transaction pointer */ | |
1032 | xfs_inode_t *ip, /* incore inode pointer */ | |
1033 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
2c3234d1 | 1034 | struct xfs_defer_ops *dfops, /* blocks to free at commit */ |
9e5987a7 DC |
1035 | int *flags) /* inode logging flags */ |
1036 | { | |
1037 | xfs_da_args_t dargs; /* args for dir/attr code */ | |
7574aa92 | 1038 | |
9e5987a7 DC |
1039 | if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) |
1040 | return 0; | |
7574aa92 | 1041 | |
c19b3b05 | 1042 | if (S_ISDIR(VFS_I(ip)->i_mode)) { |
9e5987a7 | 1043 | memset(&dargs, 0, sizeof(dargs)); |
d6cf1305 | 1044 | dargs.geo = ip->i_mount->m_dir_geo; |
9e5987a7 DC |
1045 | dargs.dp = ip; |
1046 | dargs.firstblock = firstblock; | |
2c3234d1 | 1047 | dargs.dfops = dfops; |
d6cf1305 | 1048 | dargs.total = dargs.geo->fsbcount; |
9e5987a7 DC |
1049 | dargs.whichfork = XFS_DATA_FORK; |
1050 | dargs.trans = tp; | |
1051 | return xfs_dir2_sf_to_block(&dargs); | |
1da177e4 | 1052 | } |
7574aa92 | 1053 | |
c19b3b05 | 1054 | if (S_ISLNK(VFS_I(ip)->i_mode)) |
9e5987a7 DC |
1055 | return xfs_bmap_local_to_extents(tp, ip, firstblock, 1, |
1056 | flags, XFS_DATA_FORK, | |
1057 | xfs_symlink_local_to_remote); | |
7574aa92 | 1058 | |
f3508bcd DC |
1059 | /* should only be called for types that support local format data */ |
1060 | ASSERT(0); | |
2451337d | 1061 | return -EFSCORRUPTED; |
9e5987a7 | 1062 | } |
0b1b213f | 1063 | |
9e5987a7 DC |
1064 | /* |
1065 | * Convert inode from non-attributed to attributed. | |
1066 | * Must not be in a transaction, ip must not be locked. | |
1067 | */ | |
1068 | int /* error code */ | |
1069 | xfs_bmap_add_attrfork( | |
1070 | xfs_inode_t *ip, /* incore inode pointer */ | |
1071 | int size, /* space new attribute needs */ | |
1072 | int rsvd) /* xact may use reserved blks */ | |
1073 | { | |
1074 | xfs_fsblock_t firstblock; /* 1st block/ag allocated */ | |
2c3234d1 | 1075 | struct xfs_defer_ops dfops; /* freed extent records */ |
9e5987a7 DC |
1076 | xfs_mount_t *mp; /* mount structure */ |
1077 | xfs_trans_t *tp; /* transaction pointer */ | |
1078 | int blks; /* space reservation */ | |
1079 | int version = 1; /* superblock attr version */ | |
9e5987a7 DC |
1080 | int logflags; /* logging flags */ |
1081 | int error; /* error return value */ | |
0b1b213f | 1082 | |
9e5987a7 | 1083 | ASSERT(XFS_IFORK_Q(ip) == 0); |
1da177e4 | 1084 | |
9e5987a7 DC |
1085 | mp = ip->i_mount; |
1086 | ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); | |
253f4911 | 1087 | |
9e5987a7 | 1088 | blks = XFS_ADDAFORK_SPACE_RES(mp); |
253f4911 CH |
1089 | |
1090 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_addafork, blks, 0, | |
1091 | rsvd ? XFS_TRANS_RESERVE : 0, &tp); | |
1092 | if (error) | |
9e3908e3 | 1093 | return error; |
253f4911 | 1094 | |
9e5987a7 DC |
1095 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
1096 | error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ? | |
1097 | XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : | |
1098 | XFS_QMOPT_RES_REGBLKS); | |
9e3908e3 MT |
1099 | if (error) |
1100 | goto trans_cancel; | |
9e5987a7 | 1101 | if (XFS_IFORK_Q(ip)) |
9e3908e3 | 1102 | goto trans_cancel; |
9e5987a7 | 1103 | if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) { |
1da177e4 | 1104 | /* |
9e5987a7 | 1105 | * For inodes coming from pre-6.2 filesystems. |
1da177e4 | 1106 | */ |
9e5987a7 DC |
1107 | ASSERT(ip->i_d.di_aformat == 0); |
1108 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
1109 | } | |
1110 | ASSERT(ip->i_d.di_anextents == 0); | |
ec90c556 | 1111 | |
9e3908e3 | 1112 | xfs_trans_ijoin(tp, ip, 0); |
9e5987a7 | 1113 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
1da177e4 | 1114 | |
9e5987a7 DC |
1115 | switch (ip->i_d.di_format) { |
1116 | case XFS_DINODE_FMT_DEV: | |
1117 | ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; | |
1118 | break; | |
1119 | case XFS_DINODE_FMT_UUID: | |
1120 | ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3; | |
1121 | break; | |
1122 | case XFS_DINODE_FMT_LOCAL: | |
1123 | case XFS_DINODE_FMT_EXTENTS: | |
1124 | case XFS_DINODE_FMT_BTREE: | |
1125 | ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size); | |
1126 | if (!ip->i_d.di_forkoff) | |
1127 | ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3; | |
1128 | else if (mp->m_flags & XFS_MOUNT_ATTR2) | |
1129 | version = 2; | |
1da177e4 | 1130 | break; |
9e5987a7 DC |
1131 | default: |
1132 | ASSERT(0); | |
2451337d | 1133 | error = -EINVAL; |
9e3908e3 | 1134 | goto trans_cancel; |
9e5987a7 | 1135 | } |
1da177e4 | 1136 | |
9e5987a7 DC |
1137 | ASSERT(ip->i_afp == NULL); |
1138 | ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); | |
1139 | ip->i_afp->if_flags = XFS_IFEXTENTS; | |
1140 | logflags = 0; | |
2c3234d1 | 1141 | xfs_defer_init(&dfops, &firstblock); |
9e5987a7 DC |
1142 | switch (ip->i_d.di_format) { |
1143 | case XFS_DINODE_FMT_LOCAL: | |
2c3234d1 | 1144 | error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &dfops, |
9e5987a7 DC |
1145 | &logflags); |
1146 | break; | |
1147 | case XFS_DINODE_FMT_EXTENTS: | |
1148 | error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock, | |
2c3234d1 | 1149 | &dfops, &logflags); |
9e5987a7 DC |
1150 | break; |
1151 | case XFS_DINODE_FMT_BTREE: | |
2c3234d1 | 1152 | error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &dfops, |
9e5987a7 DC |
1153 | &logflags); |
1154 | break; | |
1155 | default: | |
1156 | error = 0; | |
1da177e4 LT |
1157 | break; |
1158 | } | |
9e5987a7 DC |
1159 | if (logflags) |
1160 | xfs_trans_log_inode(tp, ip, logflags); | |
1161 | if (error) | |
9e3908e3 | 1162 | goto bmap_cancel; |
9e5987a7 DC |
1163 | if (!xfs_sb_version_hasattr(&mp->m_sb) || |
1164 | (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) { | |
61e63ecb | 1165 | bool log_sb = false; |
9e5987a7 DC |
1166 | |
1167 | spin_lock(&mp->m_sb_lock); | |
1168 | if (!xfs_sb_version_hasattr(&mp->m_sb)) { | |
1169 | xfs_sb_version_addattr(&mp->m_sb); | |
61e63ecb | 1170 | log_sb = true; |
9e5987a7 DC |
1171 | } |
1172 | if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) { | |
1173 | xfs_sb_version_addattr2(&mp->m_sb); | |
61e63ecb | 1174 | log_sb = true; |
9e5987a7 | 1175 | } |
4d11a402 | 1176 | spin_unlock(&mp->m_sb_lock); |
61e63ecb DC |
1177 | if (log_sb) |
1178 | xfs_log_sb(tp); | |
1da177e4 | 1179 | } |
9e5987a7 | 1180 | |
2c3234d1 | 1181 | error = xfs_defer_finish(&tp, &dfops, NULL); |
9e5987a7 | 1182 | if (error) |
9e3908e3 | 1183 | goto bmap_cancel; |
70393313 | 1184 | error = xfs_trans_commit(tp); |
9e3908e3 MT |
1185 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1186 | return error; | |
1187 | ||
1188 | bmap_cancel: | |
2c3234d1 | 1189 | xfs_defer_cancel(&dfops); |
9e3908e3 | 1190 | trans_cancel: |
4906e215 | 1191 | xfs_trans_cancel(tp); |
9e5987a7 | 1192 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
9e5987a7 | 1193 | return error; |
1da177e4 LT |
1194 | } |
1195 | ||
1196 | /* | |
9e5987a7 | 1197 | * Internal and external extent tree search functions. |
1da177e4 | 1198 | */ |
a5bd606b | 1199 | |
9e5987a7 DC |
1200 | /* |
1201 | * Read in the extents to if_extents. | |
1202 | * All inode fields are set up by caller, we just traverse the btree | |
1203 | * and copy the records in. If the file system cannot contain unwritten | |
1204 | * extents, the records are checked for no "state" flags. | |
1205 | */ | |
1206 | int /* error */ | |
1207 | xfs_bmap_read_extents( | |
1208 | xfs_trans_t *tp, /* transaction pointer */ | |
1209 | xfs_inode_t *ip, /* incore inode */ | |
1210 | int whichfork) /* data or attr fork */ | |
1211 | { | |
1212 | struct xfs_btree_block *block; /* current btree block */ | |
1213 | xfs_fsblock_t bno; /* block # of "block" */ | |
1214 | xfs_buf_t *bp; /* buffer for "block" */ | |
1215 | int error; /* error return value */ | |
1216 | xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */ | |
1217 | xfs_extnum_t i, j; /* index into the extents list */ | |
1218 | xfs_ifork_t *ifp; /* fork structure */ | |
1219 | int level; /* btree level, for checking */ | |
1220 | xfs_mount_t *mp; /* file system mount structure */ | |
1221 | __be64 *pp; /* pointer to block address */ | |
1222 | /* REFERENCED */ | |
1223 | xfs_extnum_t room; /* number of entries there's room for */ | |
6ef35544 | 1224 | |
9e5987a7 DC |
1225 | bno = NULLFSBLOCK; |
1226 | mp = ip->i_mount; | |
1227 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1228 | exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE : | |
1229 | XFS_EXTFMT_INODE(ip); | |
1230 | block = ifp->if_broot; | |
1da177e4 | 1231 | /* |
9e5987a7 | 1232 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. |
1da177e4 | 1233 | */ |
9e5987a7 DC |
1234 | level = be16_to_cpu(block->bb_level); |
1235 | ASSERT(level > 0); | |
1236 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); | |
1237 | bno = be64_to_cpu(*pp); | |
d5cf09ba | 1238 | ASSERT(bno != NULLFSBLOCK); |
9e5987a7 DC |
1239 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
1240 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
1da177e4 | 1241 | /* |
9e5987a7 DC |
1242 | * Go down the tree until leaf level is reached, following the first |
1243 | * pointer (leftmost) at each level. | |
1da177e4 | 1244 | */ |
9e5987a7 DC |
1245 | while (level-- > 0) { |
1246 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
1247 | XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); | |
1248 | if (error) | |
1249 | return error; | |
1250 | block = XFS_BUF_TO_BLOCK(bp); | |
9e5987a7 DC |
1251 | if (level == 0) |
1252 | break; | |
1253 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); | |
1254 | bno = be64_to_cpu(*pp); | |
c29aad41 ES |
1255 | XFS_WANT_CORRUPTED_GOTO(mp, |
1256 | XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
9e5987a7 | 1257 | xfs_trans_brelse(tp, bp); |
1da177e4 LT |
1258 | } |
1259 | /* | |
9e5987a7 | 1260 | * Here with bp and block set to the leftmost leaf node in the tree. |
1da177e4 | 1261 | */ |
9e5987a7 DC |
1262 | room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
1263 | i = 0; | |
1da177e4 | 1264 | /* |
9e5987a7 | 1265 | * Loop over all leaf nodes. Copy information to the extent records. |
1da177e4 | 1266 | */ |
9e5987a7 DC |
1267 | for (;;) { |
1268 | xfs_bmbt_rec_t *frp; | |
1269 | xfs_fsblock_t nextbno; | |
1270 | xfs_extnum_t num_recs; | |
1271 | xfs_extnum_t start; | |
0b1b213f | 1272 | |
9e5987a7 DC |
1273 | num_recs = xfs_btree_get_numrecs(block); |
1274 | if (unlikely(i + num_recs > room)) { | |
1275 | ASSERT(i + num_recs <= room); | |
1276 | xfs_warn(ip->i_mount, | |
1277 | "corrupt dinode %Lu, (btree extents).", | |
1278 | (unsigned long long) ip->i_ino); | |
1279 | XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)", | |
1280 | XFS_ERRLEVEL_LOW, ip->i_mount, block); | |
1281 | goto error0; | |
1da177e4 | 1282 | } |
1da177e4 | 1283 | /* |
9e5987a7 | 1284 | * Read-ahead the next leaf block, if any. |
1da177e4 | 1285 | */ |
9e5987a7 DC |
1286 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1287 | if (nextbno != NULLFSBLOCK) | |
1288 | xfs_btree_reada_bufl(mp, nextbno, 1, | |
1289 | &xfs_bmbt_buf_ops); | |
1da177e4 | 1290 | /* |
9e5987a7 | 1291 | * Copy records into the extent records. |
1da177e4 | 1292 | */ |
9e5987a7 DC |
1293 | frp = XFS_BMBT_REC_ADDR(mp, block, 1); |
1294 | start = i; | |
1295 | for (j = 0; j < num_recs; j++, i++, frp++) { | |
1296 | xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i); | |
1297 | trp->l0 = be64_to_cpu(frp->l0); | |
1298 | trp->l1 = be64_to_cpu(frp->l1); | |
1da177e4 | 1299 | } |
9e5987a7 DC |
1300 | if (exntf == XFS_EXTFMT_NOSTATE) { |
1301 | /* | |
1302 | * Check all attribute bmap btree records and | |
1303 | * any "older" data bmap btree records for a | |
1304 | * set bit in the "extent flag" position. | |
1305 | */ | |
1306 | if (unlikely(xfs_check_nostate_extents(ifp, | |
1307 | start, num_recs))) { | |
1308 | XFS_ERROR_REPORT("xfs_bmap_read_extents(2)", | |
1309 | XFS_ERRLEVEL_LOW, | |
1310 | ip->i_mount); | |
1311 | goto error0; | |
1312 | } | |
1313 | } | |
1314 | xfs_trans_brelse(tp, bp); | |
1315 | bno = nextbno; | |
1da177e4 | 1316 | /* |
9e5987a7 | 1317 | * If we've reached the end, stop. |
1da177e4 | 1318 | */ |
9e5987a7 DC |
1319 | if (bno == NULLFSBLOCK) |
1320 | break; | |
1321 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
1322 | XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); | |
1323 | if (error) | |
1324 | return error; | |
1325 | block = XFS_BUF_TO_BLOCK(bp); | |
1da177e4 | 1326 | } |
9e5987a7 DC |
1327 | ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); |
1328 | ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork)); | |
1329 | XFS_BMAP_TRACE_EXLIST(ip, i, whichfork); | |
1330 | return 0; | |
1331 | error0: | |
1332 | xfs_trans_brelse(tp, bp); | |
2451337d | 1333 | return -EFSCORRUPTED; |
9e5987a7 | 1334 | } |
a5bd606b | 1335 | |
a5bd606b | 1336 | |
9e5987a7 DC |
1337 | /* |
1338 | * Search the extent records for the entry containing block bno. | |
1339 | * If bno lies in a hole, point to the next entry. If bno lies | |
1340 | * past eof, *eofp will be set, and *prevp will contain the last | |
1341 | * entry (null if none). Else, *lastxp will be set to the index | |
1342 | * of the found entry; *gotp will contain the entry. | |
1343 | */ | |
1344 | STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */ | |
1345 | xfs_bmap_search_multi_extents( | |
1346 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
1347 | xfs_fileoff_t bno, /* block number searched for */ | |
1348 | int *eofp, /* out: end of file found */ | |
1349 | xfs_extnum_t *lastxp, /* out: last extent index */ | |
1350 | xfs_bmbt_irec_t *gotp, /* out: extent entry found */ | |
1351 | xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ | |
1352 | { | |
1353 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
1354 | xfs_extnum_t lastx; /* last extent index */ | |
a5bd606b | 1355 | |
9e5987a7 DC |
1356 | /* |
1357 | * Initialize the extent entry structure to catch access to | |
1358 | * uninitialized br_startblock field. | |
1359 | */ | |
1360 | gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL; | |
1361 | gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL; | |
1362 | gotp->br_state = XFS_EXT_INVALID; | |
9e5987a7 | 1363 | gotp->br_startblock = 0xffffa5a5a5a5a5a5LL; |
9e5987a7 | 1364 | prevp->br_startoff = NULLFILEOFF; |
c6534249 | 1365 | |
9e5987a7 DC |
1366 | ep = xfs_iext_bno_to_ext(ifp, bno, &lastx); |
1367 | if (lastx > 0) { | |
1368 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp); | |
1369 | } | |
1370 | if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) { | |
1371 | xfs_bmbt_get_all(ep, gotp); | |
1372 | *eofp = 0; | |
1373 | } else { | |
1374 | if (lastx > 0) { | |
1375 | *gotp = *prevp; | |
1376 | } | |
1377 | *eofp = 1; | |
1378 | ep = NULL; | |
1379 | } | |
1380 | *lastxp = lastx; | |
1381 | return ep; | |
1da177e4 LT |
1382 | } |
1383 | ||
dd9f438e | 1384 | /* |
9e5987a7 DC |
1385 | * Search the extents list for the inode, for the extent containing bno. |
1386 | * If bno lies in a hole, point to the next entry. If bno lies past eof, | |
1387 | * *eofp will be set, and *prevp will contain the last entry (null if none). | |
1388 | * Else, *lastxp will be set to the index of the found | |
1389 | * entry; *gotp will contain the entry. | |
dd9f438e | 1390 | */ |
9e5987a7 DC |
1391 | STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */ |
1392 | xfs_bmap_search_extents( | |
1393 | xfs_inode_t *ip, /* incore inode pointer */ | |
1394 | xfs_fileoff_t bno, /* block number searched for */ | |
1395 | int fork, /* data or attr fork */ | |
1396 | int *eofp, /* out: end of file found */ | |
1397 | xfs_extnum_t *lastxp, /* out: last extent index */ | |
1398 | xfs_bmbt_irec_t *gotp, /* out: extent entry found */ | |
1399 | xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ | |
dd9f438e | 1400 | { |
9e5987a7 DC |
1401 | xfs_ifork_t *ifp; /* inode fork pointer */ |
1402 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
dd9f438e | 1403 | |
ff6d6af2 | 1404 | XFS_STATS_INC(ip->i_mount, xs_look_exlist); |
9e5987a7 | 1405 | ifp = XFS_IFORK_PTR(ip, fork); |
dd9f438e | 1406 | |
9e5987a7 | 1407 | ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp); |
dd9f438e | 1408 | |
9e5987a7 DC |
1409 | if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) && |
1410 | !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) { | |
1411 | xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO, | |
1412 | "Access to block zero in inode %llu " | |
1413 | "start_block: %llx start_off: %llx " | |
08e96e1a | 1414 | "blkcnt: %llx extent-state: %x lastx: %x", |
9e5987a7 DC |
1415 | (unsigned long long)ip->i_ino, |
1416 | (unsigned long long)gotp->br_startblock, | |
1417 | (unsigned long long)gotp->br_startoff, | |
1418 | (unsigned long long)gotp->br_blockcount, | |
1419 | gotp->br_state, *lastxp); | |
1420 | *lastxp = NULLEXTNUM; | |
1421 | *eofp = 1; | |
1422 | return NULL; | |
dd9f438e | 1423 | } |
9e5987a7 DC |
1424 | return ep; |
1425 | } | |
dd9f438e | 1426 | |
9e5987a7 DC |
1427 | /* |
1428 | * Returns the file-relative block number of the first unused block(s) | |
1429 | * in the file with at least "len" logically contiguous blocks free. | |
1430 | * This is the lowest-address hole if the file has holes, else the first block | |
1431 | * past the end of file. | |
1432 | * Return 0 if the file is currently local (in-inode). | |
1433 | */ | |
1434 | int /* error */ | |
1435 | xfs_bmap_first_unused( | |
1436 | xfs_trans_t *tp, /* transaction pointer */ | |
1437 | xfs_inode_t *ip, /* incore inode */ | |
1438 | xfs_extlen_t len, /* size of hole to find */ | |
1439 | xfs_fileoff_t *first_unused, /* unused block */ | |
1440 | int whichfork) /* data or attr fork */ | |
1441 | { | |
1442 | int error; /* error return value */ | |
1443 | int idx; /* extent record index */ | |
1444 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1445 | xfs_fileoff_t lastaddr; /* last block number seen */ | |
1446 | xfs_fileoff_t lowest; /* lowest useful block */ | |
1447 | xfs_fileoff_t max; /* starting useful block */ | |
1448 | xfs_fileoff_t off; /* offset for this block */ | |
1449 | xfs_extnum_t nextents; /* number of extent entries */ | |
1450 | ||
1451 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE || | |
1452 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS || | |
1453 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
1454 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { | |
1455 | *first_unused = 0; | |
1456 | return 0; | |
dd9f438e | 1457 | } |
9e5987a7 DC |
1458 | ifp = XFS_IFORK_PTR(ip, whichfork); |
1459 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
1460 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
1461 | return error; | |
1462 | lowest = *first_unused; | |
1463 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
1464 | for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) { | |
1465 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); | |
1466 | off = xfs_bmbt_get_startoff(ep); | |
1467 | /* | |
1468 | * See if the hole before this extent will work. | |
1469 | */ | |
1470 | if (off >= lowest + len && off - max >= len) { | |
1471 | *first_unused = max; | |
1472 | return 0; | |
1473 | } | |
1474 | lastaddr = off + xfs_bmbt_get_blockcount(ep); | |
1475 | max = XFS_FILEOFF_MAX(lastaddr, lowest); | |
dd9f438e | 1476 | } |
9e5987a7 DC |
1477 | *first_unused = max; |
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | /* | |
02bb4873 | 1482 | * Returns the file-relative block number of the last block - 1 before |
9e5987a7 DC |
1483 | * last_block (input value) in the file. |
1484 | * This is not based on i_size, it is based on the extent records. | |
1485 | * Returns 0 for local files, as they do not have extent records. | |
1486 | */ | |
1487 | int /* error */ | |
1488 | xfs_bmap_last_before( | |
1489 | xfs_trans_t *tp, /* transaction pointer */ | |
1490 | xfs_inode_t *ip, /* incore inode */ | |
1491 | xfs_fileoff_t *last_block, /* last block */ | |
1492 | int whichfork) /* data or attr fork */ | |
1493 | { | |
1494 | xfs_fileoff_t bno; /* input file offset */ | |
1495 | int eof; /* hit end of file */ | |
1496 | xfs_bmbt_rec_host_t *ep; /* pointer to last extent */ | |
1497 | int error; /* error return value */ | |
1498 | xfs_bmbt_irec_t got; /* current extent value */ | |
1499 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1500 | xfs_extnum_t lastx; /* last extent used */ | |
1501 | xfs_bmbt_irec_t prev; /* previous extent value */ | |
1502 | ||
1503 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && | |
1504 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
1505 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL) | |
2451337d | 1506 | return -EIO; |
9e5987a7 DC |
1507 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { |
1508 | *last_block = 0; | |
1509 | return 0; | |
1510 | } | |
1511 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1512 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
1513 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
1514 | return error; | |
1515 | bno = *last_block - 1; | |
1516 | ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
1517 | &prev); | |
1518 | if (eof || xfs_bmbt_get_startoff(ep) > bno) { | |
1519 | if (prev.br_startoff == NULLFILEOFF) | |
1520 | *last_block = 0; | |
dd9f438e | 1521 | else |
9e5987a7 | 1522 | *last_block = prev.br_startoff + prev.br_blockcount; |
dd9f438e | 1523 | } |
dd9f438e | 1524 | /* |
9e5987a7 | 1525 | * Otherwise *last_block is already the right answer. |
dd9f438e | 1526 | */ |
9e5987a7 DC |
1527 | return 0; |
1528 | } | |
1529 | ||
68988114 | 1530 | int |
9e5987a7 DC |
1531 | xfs_bmap_last_extent( |
1532 | struct xfs_trans *tp, | |
1533 | struct xfs_inode *ip, | |
1534 | int whichfork, | |
1535 | struct xfs_bmbt_irec *rec, | |
1536 | int *is_empty) | |
1537 | { | |
1538 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
1539 | int error; | |
1540 | int nextents; | |
1541 | ||
1542 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1543 | error = xfs_iread_extents(tp, ip, whichfork); | |
1544 | if (error) | |
1545 | return error; | |
dd9f438e NS |
1546 | } |
1547 | ||
9e5987a7 DC |
1548 | nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); |
1549 | if (nextents == 0) { | |
1550 | *is_empty = 1; | |
1551 | return 0; | |
1552 | } | |
dd9f438e | 1553 | |
9e5987a7 DC |
1554 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, nextents - 1), rec); |
1555 | *is_empty = 0; | |
dd9f438e NS |
1556 | return 0; |
1557 | } | |
1558 | ||
9e5987a7 DC |
1559 | /* |
1560 | * Check the last inode extent to determine whether this allocation will result | |
1561 | * in blocks being allocated at the end of the file. When we allocate new data | |
1562 | * blocks at the end of the file which do not start at the previous data block, | |
1563 | * we will try to align the new blocks at stripe unit boundaries. | |
1564 | * | |
6e708bcf | 1565 | * Returns 1 in bma->aeof if the file (fork) is empty as any new write will be |
9e5987a7 DC |
1566 | * at, or past the EOF. |
1567 | */ | |
1568 | STATIC int | |
1569 | xfs_bmap_isaeof( | |
1570 | struct xfs_bmalloca *bma, | |
1571 | int whichfork) | |
1da177e4 | 1572 | { |
9e5987a7 DC |
1573 | struct xfs_bmbt_irec rec; |
1574 | int is_empty; | |
1575 | int error; | |
1da177e4 | 1576 | |
9e5987a7 DC |
1577 | bma->aeof = 0; |
1578 | error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec, | |
1579 | &is_empty); | |
6e708bcf | 1580 | if (error) |
9e5987a7 | 1581 | return error; |
1da177e4 | 1582 | |
6e708bcf DC |
1583 | if (is_empty) { |
1584 | bma->aeof = 1; | |
1585 | return 0; | |
1586 | } | |
1587 | ||
1da177e4 | 1588 | /* |
9e5987a7 DC |
1589 | * Check if we are allocation or past the last extent, or at least into |
1590 | * the last delayed allocated extent. | |
1da177e4 | 1591 | */ |
9e5987a7 DC |
1592 | bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount || |
1593 | (bma->offset >= rec.br_startoff && | |
1594 | isnullstartblock(rec.br_startblock)); | |
1595 | return 0; | |
1596 | } | |
1da177e4 | 1597 | |
9e5987a7 DC |
1598 | /* |
1599 | * Returns the file-relative block number of the first block past eof in | |
1600 | * the file. This is not based on i_size, it is based on the extent records. | |
1601 | * Returns 0 for local files, as they do not have extent records. | |
1602 | */ | |
1603 | int | |
1604 | xfs_bmap_last_offset( | |
9e5987a7 DC |
1605 | struct xfs_inode *ip, |
1606 | xfs_fileoff_t *last_block, | |
1607 | int whichfork) | |
1608 | { | |
1609 | struct xfs_bmbt_irec rec; | |
1610 | int is_empty; | |
1611 | int error; | |
04e99455 | 1612 | |
9e5987a7 | 1613 | *last_block = 0; |
0892ccd6 | 1614 | |
9e5987a7 DC |
1615 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) |
1616 | return 0; | |
a365bdd5 | 1617 | |
9e5987a7 DC |
1618 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && |
1619 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
2451337d | 1620 | return -EIO; |
a365bdd5 | 1621 | |
9e5987a7 DC |
1622 | error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty); |
1623 | if (error || is_empty) | |
a365bdd5 | 1624 | return error; |
9e5987a7 DC |
1625 | |
1626 | *last_block = rec.br_startoff + rec.br_blockcount; | |
a365bdd5 NS |
1627 | return 0; |
1628 | } | |
1629 | ||
9e5987a7 DC |
1630 | /* |
1631 | * Returns whether the selected fork of the inode has exactly one | |
1632 | * block or not. For the data fork we check this matches di_size, | |
1633 | * implying the file's range is 0..bsize-1. | |
1634 | */ | |
1635 | int /* 1=>1 block, 0=>otherwise */ | |
1636 | xfs_bmap_one_block( | |
1637 | xfs_inode_t *ip, /* incore inode */ | |
1638 | int whichfork) /* data or attr fork */ | |
c467c049 | 1639 | { |
9e5987a7 DC |
1640 | xfs_bmbt_rec_host_t *ep; /* ptr to fork's extent */ |
1641 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1642 | int rval; /* return value */ | |
1643 | xfs_bmbt_irec_t s; /* internal version of extent */ | |
c467c049 | 1644 | |
9e5987a7 DC |
1645 | #ifndef DEBUG |
1646 | if (whichfork == XFS_DATA_FORK) | |
1647 | return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize; | |
1648 | #endif /* !DEBUG */ | |
1649 | if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1) | |
1650 | return 0; | |
1651 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
1652 | return 0; | |
1653 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1654 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
1655 | ep = xfs_iext_get_ext(ifp, 0); | |
1656 | xfs_bmbt_get_all(ep, &s); | |
1657 | rval = s.br_startoff == 0 && s.br_blockcount == 1; | |
1658 | if (rval && whichfork == XFS_DATA_FORK) | |
1659 | ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize); | |
1660 | return rval; | |
1661 | } | |
c467c049 | 1662 | |
9e5987a7 DC |
1663 | /* |
1664 | * Extent tree manipulation functions used during allocation. | |
1665 | */ | |
c467c049 | 1666 | |
9e5987a7 DC |
1667 | /* |
1668 | * Convert a delayed allocation to a real allocation. | |
1669 | */ | |
1670 | STATIC int /* error */ | |
1671 | xfs_bmap_add_extent_delay_real( | |
1672 | struct xfs_bmalloca *bma) | |
1673 | { | |
1674 | struct xfs_bmbt_irec *new = &bma->got; | |
1675 | int diff; /* temp value */ | |
1676 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ | |
1677 | int error; /* error return value */ | |
1678 | int i; /* temp state */ | |
1679 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1680 | xfs_fileoff_t new_endoff; /* end offset of new entry */ | |
1681 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
1682 | /* left is 0, right is 1, prev is 2 */ | |
1683 | int rval=0; /* return value (logging flags) */ | |
1684 | int state = 0;/* state bits, accessed thru macros */ | |
1685 | xfs_filblks_t da_new; /* new count del alloc blocks used */ | |
1686 | xfs_filblks_t da_old; /* old count del alloc blocks used */ | |
1687 | xfs_filblks_t temp=0; /* value for da_new calculations */ | |
1688 | xfs_filblks_t temp2=0;/* value for da_new calculations */ | |
1689 | int tmp_rval; /* partial logging flags */ | |
6d3eb1ec | 1690 | int whichfork = XFS_DATA_FORK; |
c29aad41 | 1691 | struct xfs_mount *mp; |
c467c049 | 1692 | |
f1f96c49 | 1693 | mp = bma->ip->i_mount; |
6d3eb1ec | 1694 | ifp = XFS_IFORK_PTR(bma->ip, whichfork); |
c467c049 | 1695 | |
9e5987a7 DC |
1696 | ASSERT(bma->idx >= 0); |
1697 | ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); | |
1698 | ASSERT(!isnullstartblock(new->br_startblock)); | |
1699 | ASSERT(!bma->cur || | |
1700 | (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); | |
c467c049 | 1701 | |
ff6d6af2 | 1702 | XFS_STATS_INC(mp, xs_add_exlist); |
c467c049 | 1703 | |
9e5987a7 DC |
1704 | #define LEFT r[0] |
1705 | #define RIGHT r[1] | |
1706 | #define PREV r[2] | |
c467c049 CH |
1707 | |
1708 | /* | |
9e5987a7 | 1709 | * Set up a bunch of variables to make the tests simpler. |
c467c049 | 1710 | */ |
9e5987a7 DC |
1711 | ep = xfs_iext_get_ext(ifp, bma->idx); |
1712 | xfs_bmbt_get_all(ep, &PREV); | |
1713 | new_endoff = new->br_startoff + new->br_blockcount; | |
1714 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
1715 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
1716 | ||
1717 | da_old = startblockval(PREV.br_startblock); | |
1718 | da_new = 0; | |
1719 | ||
c467c049 | 1720 | /* |
9e5987a7 DC |
1721 | * Set flags determining what part of the previous delayed allocation |
1722 | * extent is being replaced by a real allocation. | |
c467c049 | 1723 | */ |
9e5987a7 DC |
1724 | if (PREV.br_startoff == new->br_startoff) |
1725 | state |= BMAP_LEFT_FILLING; | |
1726 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
1727 | state |= BMAP_RIGHT_FILLING; | |
c467c049 CH |
1728 | |
1729 | /* | |
9e5987a7 DC |
1730 | * Check and set flags if this segment has a left neighbor. |
1731 | * Don't set contiguous if the combined extent would be too large. | |
c467c049 | 1732 | */ |
9e5987a7 DC |
1733 | if (bma->idx > 0) { |
1734 | state |= BMAP_LEFT_VALID; | |
1735 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &LEFT); | |
a99ebf43 | 1736 | |
9e5987a7 DC |
1737 | if (isnullstartblock(LEFT.br_startblock)) |
1738 | state |= BMAP_LEFT_DELAY; | |
a365bdd5 | 1739 | } |
a365bdd5 | 1740 | |
9e5987a7 DC |
1741 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && |
1742 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
1743 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
1744 | LEFT.br_state == new->br_state && | |
1745 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
1746 | state |= BMAP_LEFT_CONTIG; | |
a365bdd5 | 1747 | |
1da177e4 | 1748 | /* |
9e5987a7 DC |
1749 | * Check and set flags if this segment has a right neighbor. |
1750 | * Don't set contiguous if the combined extent would be too large. | |
1751 | * Also check for all-three-contiguous being too large. | |
1da177e4 | 1752 | */ |
6d3eb1ec | 1753 | if (bma->idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) { |
9e5987a7 DC |
1754 | state |= BMAP_RIGHT_VALID; |
1755 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx + 1), &RIGHT); | |
14b064ce | 1756 | |
9e5987a7 DC |
1757 | if (isnullstartblock(RIGHT.br_startblock)) |
1758 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 1759 | } |
9e5987a7 DC |
1760 | |
1761 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && | |
1762 | new_endoff == RIGHT.br_startoff && | |
1763 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
1764 | new->br_state == RIGHT.br_state && | |
1765 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
1766 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1767 | BMAP_RIGHT_FILLING)) != | |
1768 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1769 | BMAP_RIGHT_FILLING) || | |
1770 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
1771 | <= MAXEXTLEN)) | |
1772 | state |= BMAP_RIGHT_CONTIG; | |
1773 | ||
1774 | error = 0; | |
1da177e4 | 1775 | /* |
9e5987a7 | 1776 | * Switch out based on the FILLING and CONTIG state bits. |
1da177e4 | 1777 | */ |
9e5987a7 DC |
1778 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
1779 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
1780 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
1781 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
1da177e4 | 1782 | /* |
9e5987a7 DC |
1783 | * Filling in all of a previously delayed allocation extent. |
1784 | * The left and right neighbors are both contiguous with new. | |
1da177e4 | 1785 | */ |
9e5987a7 DC |
1786 | bma->idx--; |
1787 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1788 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
1789 | LEFT.br_blockcount + PREV.br_blockcount + | |
1790 | RIGHT.br_blockcount); | |
1791 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1792 | ||
1793 | xfs_iext_remove(bma->ip, bma->idx + 1, 2, state); | |
1794 | bma->ip->i_d.di_nextents--; | |
1795 | if (bma->cur == NULL) | |
1796 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1797 | else { | |
1798 | rval = XFS_ILOG_CORE; | |
1799 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
1800 | RIGHT.br_startblock, | |
1801 | RIGHT.br_blockcount, &i); | |
1802 | if (error) | |
1803 | goto done; | |
c29aad41 | 1804 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1805 | error = xfs_btree_delete(bma->cur, &i); |
1806 | if (error) | |
1807 | goto done; | |
c29aad41 | 1808 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1809 | error = xfs_btree_decrement(bma->cur, 0, &i); |
1810 | if (error) | |
1811 | goto done; | |
c29aad41 | 1812 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1813 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, |
1814 | LEFT.br_startblock, | |
1815 | LEFT.br_blockcount + | |
1816 | PREV.br_blockcount + | |
1817 | RIGHT.br_blockcount, LEFT.br_state); | |
1818 | if (error) | |
1819 | goto done; | |
1820 | } | |
1821 | break; | |
1822 | ||
1823 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
a365bdd5 | 1824 | /* |
9e5987a7 DC |
1825 | * Filling in all of a previously delayed allocation extent. |
1826 | * The left neighbor is contiguous, the right is not. | |
a365bdd5 | 1827 | */ |
9e5987a7 DC |
1828 | bma->idx--; |
1829 | ||
1830 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1831 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
1832 | LEFT.br_blockcount + PREV.br_blockcount); | |
1833 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1834 | ||
1835 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); | |
1836 | if (bma->cur == NULL) | |
1837 | rval = XFS_ILOG_DEXT; | |
1838 | else { | |
1839 | rval = 0; | |
1840 | error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, | |
1841 | LEFT.br_startblock, LEFT.br_blockcount, | |
1842 | &i); | |
1843 | if (error) | |
1844 | goto done; | |
c29aad41 | 1845 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1846 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, |
1847 | LEFT.br_startblock, | |
1848 | LEFT.br_blockcount + | |
1849 | PREV.br_blockcount, LEFT.br_state); | |
1850 | if (error) | |
1851 | goto done; | |
1852 | } | |
1853 | break; | |
1854 | ||
1855 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
0937e0fd | 1856 | /* |
9e5987a7 DC |
1857 | * Filling in all of a previously delayed allocation extent. |
1858 | * The right neighbor is contiguous, the left is not. | |
0937e0fd | 1859 | */ |
9e5987a7 DC |
1860 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1861 | xfs_bmbt_set_startblock(ep, new->br_startblock); | |
1862 | xfs_bmbt_set_blockcount(ep, | |
1863 | PREV.br_blockcount + RIGHT.br_blockcount); | |
1864 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
0937e0fd | 1865 | |
9e5987a7 DC |
1866 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); |
1867 | if (bma->cur == NULL) | |
1868 | rval = XFS_ILOG_DEXT; | |
1869 | else { | |
1870 | rval = 0; | |
1871 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
1872 | RIGHT.br_startblock, | |
1873 | RIGHT.br_blockcount, &i); | |
1874 | if (error) | |
1875 | goto done; | |
c29aad41 | 1876 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1877 | error = xfs_bmbt_update(bma->cur, PREV.br_startoff, |
1878 | new->br_startblock, | |
1879 | PREV.br_blockcount + | |
1880 | RIGHT.br_blockcount, PREV.br_state); | |
1881 | if (error) | |
1882 | goto done; | |
1883 | } | |
1884 | break; | |
1885 | ||
1886 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: | |
a365bdd5 | 1887 | /* |
9e5987a7 DC |
1888 | * Filling in all of a previously delayed allocation extent. |
1889 | * Neither the left nor right neighbors are contiguous with | |
1890 | * the new one. | |
a365bdd5 | 1891 | */ |
9e5987a7 DC |
1892 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1893 | xfs_bmbt_set_startblock(ep, new->br_startblock); | |
1894 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
a365bdd5 | 1895 | |
9e5987a7 DC |
1896 | bma->ip->i_d.di_nextents++; |
1897 | if (bma->cur == NULL) | |
1898 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1899 | else { | |
1900 | rval = XFS_ILOG_CORE; | |
1901 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
1902 | new->br_startblock, new->br_blockcount, | |
1903 | &i); | |
1904 | if (error) | |
1905 | goto done; | |
c29aad41 | 1906 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
1907 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
1908 | error = xfs_btree_insert(bma->cur, &i); | |
1909 | if (error) | |
1910 | goto done; | |
c29aad41 | 1911 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1912 | } |
1913 | break; | |
1da177e4 | 1914 | |
9e5987a7 | 1915 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
1da177e4 | 1916 | /* |
9e5987a7 DC |
1917 | * Filling in the first part of a previous delayed allocation. |
1918 | * The left neighbor is contiguous. | |
1da177e4 | 1919 | */ |
9e5987a7 DC |
1920 | trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_); |
1921 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx - 1), | |
1922 | LEFT.br_blockcount + new->br_blockcount); | |
1923 | xfs_bmbt_set_startoff(ep, | |
1924 | PREV.br_startoff + new->br_blockcount); | |
1925 | trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_); | |
1da177e4 | 1926 | |
9e5987a7 DC |
1927 | temp = PREV.br_blockcount - new->br_blockcount; |
1928 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1929 | xfs_bmbt_set_blockcount(ep, temp); | |
1930 | if (bma->cur == NULL) | |
1931 | rval = XFS_ILOG_DEXT; | |
1932 | else { | |
1933 | rval = 0; | |
1934 | error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, | |
1935 | LEFT.br_startblock, LEFT.br_blockcount, | |
1936 | &i); | |
1937 | if (error) | |
1938 | goto done; | |
c29aad41 | 1939 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1940 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, |
1941 | LEFT.br_startblock, | |
1942 | LEFT.br_blockcount + | |
1943 | new->br_blockcount, | |
1944 | LEFT.br_state); | |
f3ca8738 | 1945 | if (error) |
1da177e4 | 1946 | goto done; |
1da177e4 | 1947 | } |
9e5987a7 DC |
1948 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
1949 | startblockval(PREV.br_startblock)); | |
1950 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
1951 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1952 | ||
1953 | bma->idx--; | |
1954 | break; | |
1955 | ||
1956 | case BMAP_LEFT_FILLING: | |
1da177e4 | 1957 | /* |
9e5987a7 DC |
1958 | * Filling in the first part of a previous delayed allocation. |
1959 | * The left neighbor is not contiguous. | |
1da177e4 | 1960 | */ |
9e5987a7 DC |
1961 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1962 | xfs_bmbt_set_startoff(ep, new_endoff); | |
1963 | temp = PREV.br_blockcount - new->br_blockcount; | |
1964 | xfs_bmbt_set_blockcount(ep, temp); | |
1965 | xfs_iext_insert(bma->ip, bma->idx, 1, new, state); | |
1966 | bma->ip->i_d.di_nextents++; | |
1967 | if (bma->cur == NULL) | |
1968 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1da177e4 | 1969 | else { |
9e5987a7 DC |
1970 | rval = XFS_ILOG_CORE; |
1971 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
1972 | new->br_startblock, new->br_blockcount, | |
1973 | &i); | |
1974 | if (error) | |
1975 | goto done; | |
c29aad41 | 1976 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
1977 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
1978 | error = xfs_btree_insert(bma->cur, &i); | |
1979 | if (error) | |
1da177e4 | 1980 | goto done; |
c29aad41 | 1981 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 1982 | } |
233eebb9 | 1983 | |
6d3eb1ec | 1984 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { |
9e5987a7 | 1985 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, |
2c3234d1 | 1986 | bma->firstblock, bma->dfops, |
6d3eb1ec | 1987 | &bma->cur, 1, &tmp_rval, whichfork); |
9e5987a7 DC |
1988 | rval |= tmp_rval; |
1989 | if (error) | |
1990 | goto done; | |
1da177e4 | 1991 | } |
9e5987a7 DC |
1992 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
1993 | startblockval(PREV.br_startblock) - | |
1994 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
1995 | ep = xfs_iext_get_ext(ifp, bma->idx + 1); | |
1996 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
1997 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
1da177e4 LT |
1998 | break; |
1999 | ||
9e5987a7 | 2000 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 | 2001 | /* |
9e5987a7 DC |
2002 | * Filling in the last part of a previous delayed allocation. |
2003 | * The right neighbor is contiguous with the new allocation. | |
1da177e4 | 2004 | */ |
9e5987a7 DC |
2005 | temp = PREV.br_blockcount - new->br_blockcount; |
2006 | trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
1da177e4 | 2007 | xfs_bmbt_set_blockcount(ep, temp); |
9e5987a7 DC |
2008 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx + 1), |
2009 | new->br_startoff, new->br_startblock, | |
2010 | new->br_blockcount + RIGHT.br_blockcount, | |
2011 | RIGHT.br_state); | |
2012 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
2013 | if (bma->cur == NULL) | |
2014 | rval = XFS_ILOG_DEXT; | |
2015 | else { | |
2016 | rval = 0; | |
2017 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
2018 | RIGHT.br_startblock, | |
2019 | RIGHT.br_blockcount, &i); | |
2020 | if (error) | |
2021 | goto done; | |
c29aad41 | 2022 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2023 | error = xfs_bmbt_update(bma->cur, new->br_startoff, |
2024 | new->br_startblock, | |
2025 | new->br_blockcount + | |
2026 | RIGHT.br_blockcount, | |
2027 | RIGHT.br_state); | |
2028 | if (error) | |
2029 | goto done; | |
1da177e4 | 2030 | } |
9e5987a7 DC |
2031 | |
2032 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), | |
2033 | startblockval(PREV.br_startblock)); | |
2034 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2035 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2036 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2037 | ||
2038 | bma->idx++; | |
1da177e4 LT |
2039 | break; |
2040 | ||
9e5987a7 | 2041 | case BMAP_RIGHT_FILLING: |
1da177e4 | 2042 | /* |
9e5987a7 DC |
2043 | * Filling in the last part of a previous delayed allocation. |
2044 | * The right neighbor is not contiguous. | |
1da177e4 | 2045 | */ |
9e5987a7 DC |
2046 | temp = PREV.br_blockcount - new->br_blockcount; |
2047 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1da177e4 | 2048 | xfs_bmbt_set_blockcount(ep, temp); |
9e5987a7 DC |
2049 | xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state); |
2050 | bma->ip->i_d.di_nextents++; | |
2051 | if (bma->cur == NULL) | |
2052 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2053 | else { | |
2054 | rval = XFS_ILOG_CORE; | |
2055 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2056 | new->br_startblock, new->br_blockcount, | |
2057 | &i); | |
2058 | if (error) | |
2059 | goto done; | |
c29aad41 | 2060 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2061 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2062 | error = xfs_btree_insert(bma->cur, &i); | |
2063 | if (error) | |
2064 | goto done; | |
c29aad41 | 2065 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 2066 | } |
9e5987a7 | 2067 | |
6d3eb1ec | 2068 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { |
9e5987a7 | 2069 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, |
2c3234d1 | 2070 | bma->firstblock, bma->dfops, &bma->cur, 1, |
6d3eb1ec | 2071 | &tmp_rval, whichfork); |
9e5987a7 DC |
2072 | rval |= tmp_rval; |
2073 | if (error) | |
2074 | goto done; | |
1da177e4 | 2075 | } |
9e5987a7 DC |
2076 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
2077 | startblockval(PREV.br_startblock) - | |
2078 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2079 | ep = xfs_iext_get_ext(ifp, bma->idx); | |
2080 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2081 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2082 | ||
2083 | bma->idx++; | |
1da177e4 LT |
2084 | break; |
2085 | ||
2086 | case 0: | |
2087 | /* | |
9e5987a7 DC |
2088 | * Filling in the middle part of a previous delayed allocation. |
2089 | * Contiguity is impossible here. | |
2090 | * This case is avoided almost all the time. | |
2091 | * | |
2092 | * We start with a delayed allocation: | |
2093 | * | |
2094 | * +ddddddddddddddddddddddddddddddddddddddddddddddddddddddd+ | |
2095 | * PREV @ idx | |
2096 | * | |
2097 | * and we are allocating: | |
2098 | * +rrrrrrrrrrrrrrrrr+ | |
2099 | * new | |
2100 | * | |
2101 | * and we set it up for insertion as: | |
2102 | * +ddddddddddddddddddd+rrrrrrrrrrrrrrrrr+ddddddddddddddddd+ | |
2103 | * new | |
2104 | * PREV @ idx LEFT RIGHT | |
2105 | * inserted at idx + 1 | |
1da177e4 | 2106 | */ |
9e5987a7 DC |
2107 | temp = new->br_startoff - PREV.br_startoff; |
2108 | temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
2109 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_); | |
2110 | xfs_bmbt_set_blockcount(ep, temp); /* truncate PREV */ | |
2111 | LEFT = *new; | |
2112 | RIGHT.br_state = PREV.br_state; | |
2113 | RIGHT.br_startblock = nullstartblock( | |
2114 | (int)xfs_bmap_worst_indlen(bma->ip, temp2)); | |
2115 | RIGHT.br_startoff = new_endoff; | |
2116 | RIGHT.br_blockcount = temp2; | |
2117 | /* insert LEFT (r[0]) and RIGHT (r[1]) at the same time */ | |
2118 | xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state); | |
2119 | bma->ip->i_d.di_nextents++; | |
2120 | if (bma->cur == NULL) | |
2121 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2122 | else { | |
2123 | rval = XFS_ILOG_CORE; | |
2124 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2125 | new->br_startblock, new->br_blockcount, | |
2126 | &i); | |
2127 | if (error) | |
2128 | goto done; | |
c29aad41 | 2129 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2130 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2131 | error = xfs_btree_insert(bma->cur, &i); | |
2132 | if (error) | |
2133 | goto done; | |
c29aad41 | 2134 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 2135 | } |
1da177e4 | 2136 | |
6d3eb1ec | 2137 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { |
9e5987a7 | 2138 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, |
2c3234d1 | 2139 | bma->firstblock, bma->dfops, &bma->cur, |
6d3eb1ec | 2140 | 1, &tmp_rval, whichfork); |
9e5987a7 DC |
2141 | rval |= tmp_rval; |
2142 | if (error) | |
2143 | goto done; | |
2144 | } | |
2145 | temp = xfs_bmap_worst_indlen(bma->ip, temp); | |
2146 | temp2 = xfs_bmap_worst_indlen(bma->ip, temp2); | |
2147 | diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) - | |
2148 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2149 | if (diff > 0) { | |
0d485ada DC |
2150 | error = xfs_mod_fdblocks(bma->ip->i_mount, |
2151 | -((int64_t)diff), false); | |
9e5987a7 DC |
2152 | ASSERT(!error); |
2153 | if (error) | |
2154 | goto done; | |
2155 | } | |
2156 | ||
2157 | ep = xfs_iext_get_ext(ifp, bma->idx); | |
2158 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
2159 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2160 | trace_xfs_bmap_pre_update(bma->ip, bma->idx + 2, state, _THIS_IP_); | |
2161 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, bma->idx + 2), | |
2162 | nullstartblock((int)temp2)); | |
2163 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 2, state, _THIS_IP_); | |
2164 | ||
2165 | bma->idx++; | |
2166 | da_new = temp + temp2; | |
2167 | break; | |
2168 | ||
2169 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2170 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2171 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
2172 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
2173 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2174 | case BMAP_LEFT_CONTIG: | |
2175 | case BMAP_RIGHT_CONTIG: | |
2176 | /* | |
2177 | * These cases are all impossible. | |
2178 | */ | |
2179 | ASSERT(0); | |
2180 | } | |
2181 | ||
9c194644 DW |
2182 | /* add reverse mapping */ |
2183 | error = xfs_rmap_map_extent(mp, bma->dfops, bma->ip, whichfork, new); | |
2184 | if (error) | |
2185 | goto done; | |
2186 | ||
9e5987a7 | 2187 | /* convert to a btree if necessary */ |
6d3eb1ec | 2188 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { |
9e5987a7 DC |
2189 | int tmp_logflags; /* partial log flag return val */ |
2190 | ||
2191 | ASSERT(bma->cur == NULL); | |
2192 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2c3234d1 | 2193 | bma->firstblock, bma->dfops, &bma->cur, |
6d3eb1ec | 2194 | da_old > 0, &tmp_logflags, whichfork); |
9e5987a7 DC |
2195 | bma->logflags |= tmp_logflags; |
2196 | if (error) | |
2197 | goto done; | |
2198 | } | |
2199 | ||
2200 | /* adjust for changes in reserved delayed indirect blocks */ | |
2201 | if (da_old || da_new) { | |
2202 | temp = da_new; | |
2203 | if (bma->cur) | |
2204 | temp += bma->cur->bc_private.b.allocated; | |
2205 | ASSERT(temp <= da_old); | |
2206 | if (temp < da_old) | |
0d485ada DC |
2207 | xfs_mod_fdblocks(bma->ip->i_mount, |
2208 | (int64_t)(da_old - temp), false); | |
96540c78 | 2209 | } |
9e5987a7 DC |
2210 | |
2211 | /* clear out the allocated field, done with it now in any case. */ | |
2212 | if (bma->cur) | |
2213 | bma->cur->bc_private.b.allocated = 0; | |
2214 | ||
6d3eb1ec | 2215 | xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); |
1da177e4 | 2216 | done: |
9e5987a7 | 2217 | bma->logflags |= rval; |
1da177e4 | 2218 | return error; |
9e5987a7 DC |
2219 | #undef LEFT |
2220 | #undef RIGHT | |
2221 | #undef PREV | |
1da177e4 LT |
2222 | } |
2223 | ||
2224 | /* | |
9e5987a7 | 2225 | * Convert an unwritten allocation to a real allocation or vice versa. |
1da177e4 | 2226 | */ |
9e5987a7 DC |
2227 | STATIC int /* error */ |
2228 | xfs_bmap_add_extent_unwritten_real( | |
2229 | struct xfs_trans *tp, | |
2230 | xfs_inode_t *ip, /* incore inode pointer */ | |
2231 | xfs_extnum_t *idx, /* extent number to update/insert */ | |
2232 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
2233 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ | |
2234 | xfs_fsblock_t *first, /* pointer to firstblock variable */ | |
2c3234d1 | 2235 | struct xfs_defer_ops *dfops, /* list of extents to be freed */ |
9e5987a7 | 2236 | int *logflagsp) /* inode logging flags */ |
1da177e4 | 2237 | { |
9e5987a7 DC |
2238 | xfs_btree_cur_t *cur; /* btree cursor */ |
2239 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ | |
2240 | int error; /* error return value */ | |
2241 | int i; /* temp state */ | |
2242 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
2243 | xfs_fileoff_t new_endoff; /* end offset of new entry */ | |
2244 | xfs_exntst_t newext; /* new extent state */ | |
2245 | xfs_exntst_t oldext; /* old extent state */ | |
2246 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
2247 | /* left is 0, right is 1, prev is 2 */ | |
2248 | int rval=0; /* return value (logging flags) */ | |
2249 | int state = 0;/* state bits, accessed thru macros */ | |
c29aad41 | 2250 | struct xfs_mount *mp = tp->t_mountp; |
1da177e4 | 2251 | |
9e5987a7 | 2252 | *logflagsp = 0; |
1da177e4 | 2253 | |
9e5987a7 DC |
2254 | cur = *curp; |
2255 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
8096b1eb | 2256 | |
9e5987a7 DC |
2257 | ASSERT(*idx >= 0); |
2258 | ASSERT(*idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); | |
2259 | ASSERT(!isnullstartblock(new->br_startblock)); | |
2260 | ||
ff6d6af2 | 2261 | XFS_STATS_INC(mp, xs_add_exlist); |
9e5987a7 DC |
2262 | |
2263 | #define LEFT r[0] | |
2264 | #define RIGHT r[1] | |
2265 | #define PREV r[2] | |
7cc95a82 | 2266 | |
1da177e4 | 2267 | /* |
9e5987a7 | 2268 | * Set up a bunch of variables to make the tests simpler. |
1da177e4 | 2269 | */ |
9e5987a7 DC |
2270 | error = 0; |
2271 | ep = xfs_iext_get_ext(ifp, *idx); | |
2272 | xfs_bmbt_get_all(ep, &PREV); | |
2273 | newext = new->br_state; | |
2274 | oldext = (newext == XFS_EXT_UNWRITTEN) ? | |
2275 | XFS_EXT_NORM : XFS_EXT_UNWRITTEN; | |
2276 | ASSERT(PREV.br_state == oldext); | |
2277 | new_endoff = new->br_startoff + new->br_blockcount; | |
2278 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
2279 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
7cc95a82 | 2280 | |
1da177e4 | 2281 | /* |
9e5987a7 DC |
2282 | * Set flags determining what part of the previous oldext allocation |
2283 | * extent is being replaced by a newext allocation. | |
1da177e4 | 2284 | */ |
9e5987a7 DC |
2285 | if (PREV.br_startoff == new->br_startoff) |
2286 | state |= BMAP_LEFT_FILLING; | |
2287 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
2288 | state |= BMAP_RIGHT_FILLING; | |
2289 | ||
1da177e4 | 2290 | /* |
9e5987a7 DC |
2291 | * Check and set flags if this segment has a left neighbor. |
2292 | * Don't set contiguous if the combined extent would be too large. | |
1da177e4 | 2293 | */ |
9e5987a7 DC |
2294 | if (*idx > 0) { |
2295 | state |= BMAP_LEFT_VALID; | |
2296 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &LEFT); | |
2297 | ||
2298 | if (isnullstartblock(LEFT.br_startblock)) | |
2299 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 2300 | } |
9e5987a7 DC |
2301 | |
2302 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
2303 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
2304 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
2305 | LEFT.br_state == newext && | |
2306 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2307 | state |= BMAP_LEFT_CONTIG; | |
2308 | ||
1da177e4 | 2309 | /* |
9e5987a7 DC |
2310 | * Check and set flags if this segment has a right neighbor. |
2311 | * Don't set contiguous if the combined extent would be too large. | |
2312 | * Also check for all-three-contiguous being too large. | |
1da177e4 | 2313 | */ |
9e5987a7 DC |
2314 | if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) { |
2315 | state |= BMAP_RIGHT_VALID; | |
2316 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx + 1), &RIGHT); | |
2317 | if (isnullstartblock(RIGHT.br_startblock)) | |
2318 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 2319 | } |
7cc95a82 | 2320 | |
9e5987a7 DC |
2321 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && |
2322 | new_endoff == RIGHT.br_startoff && | |
2323 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
2324 | newext == RIGHT.br_state && | |
2325 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
2326 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
2327 | BMAP_RIGHT_FILLING)) != | |
2328 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
2329 | BMAP_RIGHT_FILLING) || | |
2330 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
2331 | <= MAXEXTLEN)) | |
2332 | state |= BMAP_RIGHT_CONTIG; | |
136341b4 | 2333 | |
1da177e4 | 2334 | /* |
9e5987a7 | 2335 | * Switch out based on the FILLING and CONTIG state bits. |
1da177e4 | 2336 | */ |
9e5987a7 DC |
2337 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
2338 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
2339 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
2340 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
2341 | /* | |
2342 | * Setting all of a previous oldext extent to newext. | |
2343 | * The left and right neighbors are both contiguous with new. | |
2344 | */ | |
2345 | --*idx; | |
1a5902c5 | 2346 | |
9e5987a7 DC |
2347 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2348 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), | |
2349 | LEFT.br_blockcount + PREV.br_blockcount + | |
2350 | RIGHT.br_blockcount); | |
2351 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1a5902c5 | 2352 | |
9e5987a7 DC |
2353 | xfs_iext_remove(ip, *idx + 1, 2, state); |
2354 | ip->i_d.di_nextents -= 2; | |
2355 | if (cur == NULL) | |
2356 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2357 | else { | |
2358 | rval = XFS_ILOG_CORE; | |
2359 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
2360 | RIGHT.br_startblock, | |
2361 | RIGHT.br_blockcount, &i))) | |
2362 | goto done; | |
c29aad41 | 2363 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2364 | if ((error = xfs_btree_delete(cur, &i))) |
2365 | goto done; | |
c29aad41 | 2366 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2367 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2368 | goto done; | |
c29aad41 | 2369 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2370 | if ((error = xfs_btree_delete(cur, &i))) |
2371 | goto done; | |
c29aad41 | 2372 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2373 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2374 | goto done; | |
c29aad41 | 2375 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2376 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
2377 | LEFT.br_startblock, | |
2378 | LEFT.br_blockcount + PREV.br_blockcount + | |
2379 | RIGHT.br_blockcount, LEFT.br_state))) | |
2380 | goto done; | |
2381 | } | |
2382 | break; | |
1a5902c5 | 2383 | |
9e5987a7 DC |
2384 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: |
2385 | /* | |
2386 | * Setting all of a previous oldext extent to newext. | |
2387 | * The left neighbor is contiguous, the right is not. | |
2388 | */ | |
2389 | --*idx; | |
d8cc890d | 2390 | |
9e5987a7 DC |
2391 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2392 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), | |
2393 | LEFT.br_blockcount + PREV.br_blockcount); | |
2394 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2395 | |
9e5987a7 DC |
2396 | xfs_iext_remove(ip, *idx + 1, 1, state); |
2397 | ip->i_d.di_nextents--; | |
2398 | if (cur == NULL) | |
2399 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2400 | else { | |
2401 | rval = XFS_ILOG_CORE; | |
2402 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2403 | PREV.br_startblock, PREV.br_blockcount, | |
2404 | &i))) | |
2405 | goto done; | |
c29aad41 | 2406 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2407 | if ((error = xfs_btree_delete(cur, &i))) |
2408 | goto done; | |
c29aad41 | 2409 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2410 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2411 | goto done; | |
c29aad41 | 2412 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2413 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
2414 | LEFT.br_startblock, | |
2415 | LEFT.br_blockcount + PREV.br_blockcount, | |
2416 | LEFT.br_state))) | |
2417 | goto done; | |
2418 | } | |
2419 | break; | |
1da177e4 | 2420 | |
9e5987a7 | 2421 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 | 2422 | /* |
9e5987a7 DC |
2423 | * Setting all of a previous oldext extent to newext. |
2424 | * The right neighbor is contiguous, the left is not. | |
1da177e4 | 2425 | */ |
9e5987a7 DC |
2426 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2427 | xfs_bmbt_set_blockcount(ep, | |
2428 | PREV.br_blockcount + RIGHT.br_blockcount); | |
2429 | xfs_bmbt_set_state(ep, newext); | |
2430 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2431 | xfs_iext_remove(ip, *idx + 1, 1, state); | |
2432 | ip->i_d.di_nextents--; | |
2433 | if (cur == NULL) | |
2434 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2435 | else { | |
2436 | rval = XFS_ILOG_CORE; | |
2437 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
2438 | RIGHT.br_startblock, | |
2439 | RIGHT.br_blockcount, &i))) | |
2440 | goto done; | |
c29aad41 | 2441 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2442 | if ((error = xfs_btree_delete(cur, &i))) |
2443 | goto done; | |
c29aad41 | 2444 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2445 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2446 | goto done; | |
c29aad41 | 2447 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2448 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
2449 | new->br_startblock, | |
2450 | new->br_blockcount + RIGHT.br_blockcount, | |
2451 | newext))) | |
2452 | goto done; | |
1da177e4 | 2453 | } |
9e5987a7 | 2454 | break; |
1e82379b | 2455 | |
9e5987a7 DC |
2456 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: |
2457 | /* | |
2458 | * Setting all of a previous oldext extent to newext. | |
2459 | * Neither the left nor right neighbors are contiguous with | |
2460 | * the new one. | |
2461 | */ | |
2462 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2463 | xfs_bmbt_set_state(ep, newext); | |
2464 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1e82379b | 2465 | |
9e5987a7 DC |
2466 | if (cur == NULL) |
2467 | rval = XFS_ILOG_DEXT; | |
2468 | else { | |
2469 | rval = 0; | |
2470 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2471 | new->br_startblock, new->br_blockcount, | |
2472 | &i))) | |
2473 | goto done; | |
c29aad41 | 2474 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2475 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
2476 | new->br_startblock, new->br_blockcount, | |
2477 | newext))) | |
2478 | goto done; | |
2479 | } | |
2480 | break; | |
1e82379b | 2481 | |
9e5987a7 DC |
2482 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
2483 | /* | |
2484 | * Setting the first part of a previous oldext extent to newext. | |
2485 | * The left neighbor is contiguous. | |
2486 | */ | |
2487 | trace_xfs_bmap_pre_update(ip, *idx - 1, state, _THIS_IP_); | |
2488 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx - 1), | |
2489 | LEFT.br_blockcount + new->br_blockcount); | |
2490 | xfs_bmbt_set_startoff(ep, | |
2491 | PREV.br_startoff + new->br_blockcount); | |
2492 | trace_xfs_bmap_post_update(ip, *idx - 1, state, _THIS_IP_); | |
1da177e4 | 2493 | |
9e5987a7 DC |
2494 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2495 | xfs_bmbt_set_startblock(ep, | |
2496 | new->br_startblock + new->br_blockcount); | |
2497 | xfs_bmbt_set_blockcount(ep, | |
2498 | PREV.br_blockcount - new->br_blockcount); | |
2499 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
0293ce3a | 2500 | |
9e5987a7 | 2501 | --*idx; |
8867bc9b | 2502 | |
9e5987a7 DC |
2503 | if (cur == NULL) |
2504 | rval = XFS_ILOG_DEXT; | |
2505 | else { | |
2506 | rval = 0; | |
2507 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2508 | PREV.br_startblock, PREV.br_blockcount, | |
2509 | &i))) | |
2510 | goto done; | |
c29aad41 | 2511 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2512 | if ((error = xfs_bmbt_update(cur, |
2513 | PREV.br_startoff + new->br_blockcount, | |
2514 | PREV.br_startblock + new->br_blockcount, | |
2515 | PREV.br_blockcount - new->br_blockcount, | |
2516 | oldext))) | |
2517 | goto done; | |
2518 | if ((error = xfs_btree_decrement(cur, 0, &i))) | |
2519 | goto done; | |
2520 | error = xfs_bmbt_update(cur, LEFT.br_startoff, | |
2521 | LEFT.br_startblock, | |
2522 | LEFT.br_blockcount + new->br_blockcount, | |
2523 | LEFT.br_state); | |
2524 | if (error) | |
2525 | goto done; | |
8867bc9b | 2526 | } |
9e5987a7 | 2527 | break; |
0293ce3a | 2528 | |
9e5987a7 DC |
2529 | case BMAP_LEFT_FILLING: |
2530 | /* | |
2531 | * Setting the first part of a previous oldext extent to newext. | |
2532 | * The left neighbor is not contiguous. | |
2533 | */ | |
2534 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2535 | ASSERT(ep && xfs_bmbt_get_state(ep) == oldext); | |
2536 | xfs_bmbt_set_startoff(ep, new_endoff); | |
2537 | xfs_bmbt_set_blockcount(ep, | |
2538 | PREV.br_blockcount - new->br_blockcount); | |
2539 | xfs_bmbt_set_startblock(ep, | |
2540 | new->br_startblock + new->br_blockcount); | |
2541 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2542 | |
9e5987a7 DC |
2543 | xfs_iext_insert(ip, *idx, 1, new, state); |
2544 | ip->i_d.di_nextents++; | |
2545 | if (cur == NULL) | |
2546 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2547 | else { | |
2548 | rval = XFS_ILOG_CORE; | |
2549 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2550 | PREV.br_startblock, PREV.br_blockcount, | |
2551 | &i))) | |
2552 | goto done; | |
c29aad41 | 2553 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2554 | if ((error = xfs_bmbt_update(cur, |
2555 | PREV.br_startoff + new->br_blockcount, | |
2556 | PREV.br_startblock + new->br_blockcount, | |
2557 | PREV.br_blockcount - new->br_blockcount, | |
2558 | oldext))) | |
2559 | goto done; | |
2560 | cur->bc_rec.b = *new; | |
2561 | if ((error = xfs_btree_insert(cur, &i))) | |
2562 | goto done; | |
c29aad41 | 2563 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2564 | } |
2565 | break; | |
1da177e4 | 2566 | |
9e5987a7 DC |
2567 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
2568 | /* | |
2569 | * Setting the last part of a previous oldext extent to newext. | |
2570 | * The right neighbor is contiguous with the new allocation. | |
2571 | */ | |
2572 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2573 | xfs_bmbt_set_blockcount(ep, | |
2574 | PREV.br_blockcount - new->br_blockcount); | |
2575 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
0293ce3a | 2576 | |
9e5987a7 | 2577 | ++*idx; |
1da177e4 | 2578 | |
9e5987a7 DC |
2579 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2580 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), | |
2581 | new->br_startoff, new->br_startblock, | |
2582 | new->br_blockcount + RIGHT.br_blockcount, newext); | |
2583 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2584 | |
9e5987a7 DC |
2585 | if (cur == NULL) |
2586 | rval = XFS_ILOG_DEXT; | |
2587 | else { | |
2588 | rval = 0; | |
2589 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2590 | PREV.br_startblock, | |
2591 | PREV.br_blockcount, &i))) | |
2592 | goto done; | |
c29aad41 | 2593 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2594 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
2595 | PREV.br_startblock, | |
2596 | PREV.br_blockcount - new->br_blockcount, | |
2597 | oldext))) | |
2598 | goto done; | |
2599 | if ((error = xfs_btree_increment(cur, 0, &i))) | |
2600 | goto done; | |
2601 | if ((error = xfs_bmbt_update(cur, new->br_startoff, | |
2602 | new->br_startblock, | |
2603 | new->br_blockcount + RIGHT.br_blockcount, | |
2604 | newext))) | |
2605 | goto done; | |
2606 | } | |
2607 | break; | |
1da177e4 | 2608 | |
9e5987a7 DC |
2609 | case BMAP_RIGHT_FILLING: |
2610 | /* | |
2611 | * Setting the last part of a previous oldext extent to newext. | |
2612 | * The right neighbor is not contiguous. | |
2613 | */ | |
2614 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2615 | xfs_bmbt_set_blockcount(ep, | |
2616 | PREV.br_blockcount - new->br_blockcount); | |
2617 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2618 | |
9e5987a7 DC |
2619 | ++*idx; |
2620 | xfs_iext_insert(ip, *idx, 1, new, state); | |
d8cc890d | 2621 | |
9e5987a7 DC |
2622 | ip->i_d.di_nextents++; |
2623 | if (cur == NULL) | |
2624 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2625 | else { | |
2626 | rval = XFS_ILOG_CORE; | |
2627 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2628 | PREV.br_startblock, PREV.br_blockcount, | |
2629 | &i))) | |
2630 | goto done; | |
c29aad41 | 2631 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2632 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
2633 | PREV.br_startblock, | |
2634 | PREV.br_blockcount - new->br_blockcount, | |
2635 | oldext))) | |
2636 | goto done; | |
2637 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2638 | new->br_startblock, new->br_blockcount, | |
2639 | &i))) | |
2640 | goto done; | |
c29aad41 | 2641 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2642 | cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2643 | if ((error = xfs_btree_insert(cur, &i))) | |
2644 | goto done; | |
c29aad41 | 2645 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2646 | } |
2647 | break; | |
2648 | ||
2649 | case 0: | |
1da177e4 | 2650 | /* |
9e5987a7 DC |
2651 | * Setting the middle part of a previous oldext extent to |
2652 | * newext. Contiguity is impossible here. | |
2653 | * One extent becomes three extents. | |
1da177e4 | 2654 | */ |
9e5987a7 DC |
2655 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2656 | xfs_bmbt_set_blockcount(ep, | |
2657 | new->br_startoff - PREV.br_startoff); | |
2658 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
898621d5 | 2659 | |
9e5987a7 DC |
2660 | r[0] = *new; |
2661 | r[1].br_startoff = new_endoff; | |
2662 | r[1].br_blockcount = | |
2663 | PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
2664 | r[1].br_startblock = new->br_startblock + new->br_blockcount; | |
2665 | r[1].br_state = oldext; | |
898621d5 | 2666 | |
9e5987a7 DC |
2667 | ++*idx; |
2668 | xfs_iext_insert(ip, *idx, 2, &r[0], state); | |
2669 | ||
2670 | ip->i_d.di_nextents += 2; | |
2671 | if (cur == NULL) | |
2672 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2673 | else { | |
2674 | rval = XFS_ILOG_CORE; | |
2675 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2676 | PREV.br_startblock, PREV.br_blockcount, | |
2677 | &i))) | |
2678 | goto done; | |
c29aad41 | 2679 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2680 | /* new right extent - oldext */ |
2681 | if ((error = xfs_bmbt_update(cur, r[1].br_startoff, | |
2682 | r[1].br_startblock, r[1].br_blockcount, | |
2683 | r[1].br_state))) | |
2684 | goto done; | |
2685 | /* new left extent - oldext */ | |
2686 | cur->bc_rec.b = PREV; | |
2687 | cur->bc_rec.b.br_blockcount = | |
2688 | new->br_startoff - PREV.br_startoff; | |
2689 | if ((error = xfs_btree_insert(cur, &i))) | |
2690 | goto done; | |
c29aad41 | 2691 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2692 | /* |
2693 | * Reset the cursor to the position of the new extent | |
2694 | * we are about to insert as we can't trust it after | |
2695 | * the previous insert. | |
2696 | */ | |
2697 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2698 | new->br_startblock, new->br_blockcount, | |
2699 | &i))) | |
2700 | goto done; | |
c29aad41 | 2701 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2702 | /* new middle extent - newext */ |
2703 | cur->bc_rec.b.br_state = new->br_state; | |
2704 | if ((error = xfs_btree_insert(cur, &i))) | |
2705 | goto done; | |
c29aad41 | 2706 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 | 2707 | } |
1da177e4 | 2708 | break; |
9e5987a7 DC |
2709 | |
2710 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2711 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2712 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
2713 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
2714 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2715 | case BMAP_LEFT_CONTIG: | |
2716 | case BMAP_RIGHT_CONTIG: | |
2717 | /* | |
2718 | * These cases are all impossible. | |
2719 | */ | |
1da177e4 | 2720 | ASSERT(0); |
1da177e4 | 2721 | } |
8096b1eb | 2722 | |
9c194644 DW |
2723 | /* update reverse mappings */ |
2724 | error = xfs_rmap_convert_extent(mp, dfops, ip, XFS_DATA_FORK, new); | |
2725 | if (error) | |
2726 | goto done; | |
2727 | ||
9e5987a7 DC |
2728 | /* convert to a btree if necessary */ |
2729 | if (xfs_bmap_needs_btree(ip, XFS_DATA_FORK)) { | |
2730 | int tmp_logflags; /* partial log flag return val */ | |
2731 | ||
2732 | ASSERT(cur == NULL); | |
2c3234d1 | 2733 | error = xfs_bmap_extents_to_btree(tp, ip, first, dfops, &cur, |
9e5987a7 DC |
2734 | 0, &tmp_logflags, XFS_DATA_FORK); |
2735 | *logflagsp |= tmp_logflags; | |
2736 | if (error) | |
2737 | goto done; | |
1da177e4 | 2738 | } |
da087bad | 2739 | |
9e5987a7 DC |
2740 | /* clear out the allocated field, done with it now in any case. */ |
2741 | if (cur) { | |
2742 | cur->bc_private.b.allocated = 0; | |
2743 | *curp = cur; | |
1da177e4 | 2744 | } |
8096b1eb | 2745 | |
9e5987a7 DC |
2746 | xfs_bmap_check_leaf_extents(*curp, ip, XFS_DATA_FORK); |
2747 | done: | |
2748 | *logflagsp |= rval; | |
1da177e4 | 2749 | return error; |
9e5987a7 DC |
2750 | #undef LEFT |
2751 | #undef RIGHT | |
2752 | #undef PREV | |
1da177e4 LT |
2753 | } |
2754 | ||
2755 | /* | |
9e5987a7 | 2756 | * Convert a hole to a delayed allocation. |
1da177e4 | 2757 | */ |
9e5987a7 DC |
2758 | STATIC void |
2759 | xfs_bmap_add_extent_hole_delay( | |
2760 | xfs_inode_t *ip, /* incore inode pointer */ | |
2761 | xfs_extnum_t *idx, /* extent number to update/insert */ | |
2762 | xfs_bmbt_irec_t *new) /* new data to add to file extents */ | |
1da177e4 | 2763 | { |
9e5987a7 DC |
2764 | xfs_ifork_t *ifp; /* inode fork pointer */ |
2765 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ | |
2766 | xfs_filblks_t newlen=0; /* new indirect size */ | |
2767 | xfs_filblks_t oldlen=0; /* old indirect size */ | |
2768 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
2769 | int state; /* state bits, accessed thru macros */ | |
2770 | xfs_filblks_t temp=0; /* temp for indirect calculations */ | |
1da177e4 | 2771 | |
9e5987a7 DC |
2772 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
2773 | state = 0; | |
2774 | ASSERT(isnullstartblock(new->br_startblock)); | |
1da177e4 LT |
2775 | |
2776 | /* | |
9e5987a7 | 2777 | * Check and set flags if this segment has a left neighbor |
1da177e4 | 2778 | */ |
9e5987a7 DC |
2779 | if (*idx > 0) { |
2780 | state |= BMAP_LEFT_VALID; | |
2781 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &left); | |
2782 | ||
2783 | if (isnullstartblock(left.br_startblock)) | |
2784 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 2785 | } |
1da177e4 | 2786 | |
9e5987a7 DC |
2787 | /* |
2788 | * Check and set flags if the current (right) segment exists. | |
2789 | * If it doesn't exist, we're converting the hole at end-of-file. | |
2790 | */ | |
2791 | if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { | |
2792 | state |= BMAP_RIGHT_VALID; | |
2793 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right); | |
1da177e4 | 2794 | |
9e5987a7 DC |
2795 | if (isnullstartblock(right.br_startblock)) |
2796 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 2797 | } |
9e5987a7 | 2798 | |
1da177e4 | 2799 | /* |
9e5987a7 DC |
2800 | * Set contiguity flags on the left and right neighbors. |
2801 | * Don't let extents get too large, even if the pieces are contiguous. | |
1da177e4 | 2802 | */ |
9e5987a7 DC |
2803 | if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) && |
2804 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
2805 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2806 | state |= BMAP_LEFT_CONTIG; | |
2807 | ||
2808 | if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) && | |
2809 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
2810 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
2811 | (!(state & BMAP_LEFT_CONTIG) || | |
2812 | (left.br_blockcount + new->br_blockcount + | |
2813 | right.br_blockcount <= MAXEXTLEN))) | |
2814 | state |= BMAP_RIGHT_CONTIG; | |
cc09c0dc DC |
2815 | |
2816 | /* | |
9e5987a7 | 2817 | * Switch out based on the contiguity flags. |
cc09c0dc | 2818 | */ |
9e5987a7 DC |
2819 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { |
2820 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2821 | /* | |
2822 | * New allocation is contiguous with delayed allocations | |
2823 | * on the left and on the right. | |
2824 | * Merge all three into a single extent record. | |
2825 | */ | |
2826 | --*idx; | |
2827 | temp = left.br_blockcount + new->br_blockcount + | |
2828 | right.br_blockcount; | |
cc09c0dc | 2829 | |
9e5987a7 DC |
2830 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2831 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); | |
2832 | oldlen = startblockval(left.br_startblock) + | |
2833 | startblockval(new->br_startblock) + | |
2834 | startblockval(right.br_startblock); | |
2835 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2836 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), | |
2837 | nullstartblock((int)newlen)); | |
2838 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2839 | |
9e5987a7 DC |
2840 | xfs_iext_remove(ip, *idx + 1, 1, state); |
2841 | break; | |
1da177e4 | 2842 | |
9e5987a7 DC |
2843 | case BMAP_LEFT_CONTIG: |
2844 | /* | |
2845 | * New allocation is contiguous with a delayed allocation | |
2846 | * on the left. | |
2847 | * Merge the new allocation with the left neighbor. | |
2848 | */ | |
2849 | --*idx; | |
2850 | temp = left.br_blockcount + new->br_blockcount; | |
1da177e4 | 2851 | |
9e5987a7 DC |
2852 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2853 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); | |
2854 | oldlen = startblockval(left.br_startblock) + | |
2855 | startblockval(new->br_startblock); | |
2856 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2857 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), | |
2858 | nullstartblock((int)newlen)); | |
2859 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2860 | break; | |
1da177e4 | 2861 | |
9e5987a7 DC |
2862 | case BMAP_RIGHT_CONTIG: |
2863 | /* | |
2864 | * New allocation is contiguous with a delayed allocation | |
2865 | * on the right. | |
2866 | * Merge the new allocation with the right neighbor. | |
2867 | */ | |
2868 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2869 | temp = new->br_blockcount + right.br_blockcount; | |
2870 | oldlen = startblockval(new->br_startblock) + | |
2871 | startblockval(right.br_startblock); | |
2872 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2873 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), | |
2874 | new->br_startoff, | |
2875 | nullstartblock((int)newlen), temp, right.br_state); | |
2876 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2877 | break; | |
2878 | ||
2879 | case 0: | |
2880 | /* | |
2881 | * New allocation is not contiguous with another | |
2882 | * delayed allocation. | |
2883 | * Insert a new entry. | |
2884 | */ | |
2885 | oldlen = newlen = 0; | |
2886 | xfs_iext_insert(ip, *idx, 1, new, state); | |
2887 | break; | |
1da177e4 | 2888 | } |
9e5987a7 DC |
2889 | if (oldlen != newlen) { |
2890 | ASSERT(oldlen > newlen); | |
0d485ada DC |
2891 | xfs_mod_fdblocks(ip->i_mount, (int64_t)(oldlen - newlen), |
2892 | false); | |
1da177e4 | 2893 | /* |
9e5987a7 | 2894 | * Nothing to do for disk quota accounting here. |
1da177e4 | 2895 | */ |
1da177e4 | 2896 | } |
1da177e4 LT |
2897 | } |
2898 | ||
2899 | /* | |
9e5987a7 | 2900 | * Convert a hole to a real allocation. |
1da177e4 | 2901 | */ |
9e5987a7 DC |
2902 | STATIC int /* error */ |
2903 | xfs_bmap_add_extent_hole_real( | |
2904 | struct xfs_bmalloca *bma, | |
2905 | int whichfork) | |
27a3f8f2 | 2906 | { |
9e5987a7 DC |
2907 | struct xfs_bmbt_irec *new = &bma->got; |
2908 | int error; /* error return value */ | |
2909 | int i; /* temp state */ | |
2910 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
2911 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ | |
2912 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
2913 | int rval=0; /* return value (logging flags) */ | |
2914 | int state; /* state bits, accessed thru macros */ | |
c29aad41 | 2915 | struct xfs_mount *mp; |
27a3f8f2 | 2916 | |
f1f96c49 | 2917 | mp = bma->ip->i_mount; |
9e5987a7 | 2918 | ifp = XFS_IFORK_PTR(bma->ip, whichfork); |
27a3f8f2 | 2919 | |
9e5987a7 DC |
2920 | ASSERT(bma->idx >= 0); |
2921 | ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); | |
2922 | ASSERT(!isnullstartblock(new->br_startblock)); | |
2923 | ASSERT(!bma->cur || | |
2924 | !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); | |
27a3f8f2 | 2925 | |
ff6d6af2 | 2926 | XFS_STATS_INC(mp, xs_add_exlist); |
27a3f8f2 | 2927 | |
9e5987a7 DC |
2928 | state = 0; |
2929 | if (whichfork == XFS_ATTR_FORK) | |
2930 | state |= BMAP_ATTRFORK; | |
27a3f8f2 | 2931 | |
9e5987a7 DC |
2932 | /* |
2933 | * Check and set flags if this segment has a left neighbor. | |
2934 | */ | |
2935 | if (bma->idx > 0) { | |
2936 | state |= BMAP_LEFT_VALID; | |
2937 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &left); | |
2938 | if (isnullstartblock(left.br_startblock)) | |
2939 | state |= BMAP_LEFT_DELAY; | |
2940 | } | |
27a3f8f2 CH |
2941 | |
2942 | /* | |
9e5987a7 DC |
2943 | * Check and set flags if this segment has a current value. |
2944 | * Not true if we're inserting into the "hole" at eof. | |
27a3f8f2 | 2945 | */ |
9e5987a7 DC |
2946 | if (bma->idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { |
2947 | state |= BMAP_RIGHT_VALID; | |
2948 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &right); | |
2949 | if (isnullstartblock(right.br_startblock)) | |
2950 | state |= BMAP_RIGHT_DELAY; | |
2951 | } | |
27a3f8f2 | 2952 | |
9e5987a7 DC |
2953 | /* |
2954 | * We're inserting a real allocation between "left" and "right". | |
2955 | * Set the contiguity flags. Don't let extents get too large. | |
2956 | */ | |
2957 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
2958 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
2959 | left.br_startblock + left.br_blockcount == new->br_startblock && | |
2960 | left.br_state == new->br_state && | |
2961 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2962 | state |= BMAP_LEFT_CONTIG; | |
27a3f8f2 | 2963 | |
9e5987a7 DC |
2964 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && |
2965 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
2966 | new->br_startblock + new->br_blockcount == right.br_startblock && | |
2967 | new->br_state == right.br_state && | |
2968 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
2969 | (!(state & BMAP_LEFT_CONTIG) || | |
2970 | left.br_blockcount + new->br_blockcount + | |
2971 | right.br_blockcount <= MAXEXTLEN)) | |
2972 | state |= BMAP_RIGHT_CONTIG; | |
27a3f8f2 | 2973 | |
9e5987a7 DC |
2974 | error = 0; |
2975 | /* | |
2976 | * Select which case we're in here, and implement it. | |
2977 | */ | |
2978 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { | |
2979 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2980 | /* | |
2981 | * New allocation is contiguous with real allocations on the | |
2982 | * left and on the right. | |
2983 | * Merge all three into a single extent record. | |
2984 | */ | |
2985 | --bma->idx; | |
2986 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2987 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
2988 | left.br_blockcount + new->br_blockcount + | |
2989 | right.br_blockcount); | |
2990 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
27a3f8f2 | 2991 | |
9e5987a7 | 2992 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); |
27a3f8f2 | 2993 | |
9e5987a7 DC |
2994 | XFS_IFORK_NEXT_SET(bma->ip, whichfork, |
2995 | XFS_IFORK_NEXTENTS(bma->ip, whichfork) - 1); | |
2996 | if (bma->cur == NULL) { | |
2997 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
2998 | } else { | |
2999 | rval = XFS_ILOG_CORE; | |
3000 | error = xfs_bmbt_lookup_eq(bma->cur, right.br_startoff, | |
3001 | right.br_startblock, right.br_blockcount, | |
3002 | &i); | |
3003 | if (error) | |
3004 | goto done; | |
c29aad41 | 3005 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3006 | error = xfs_btree_delete(bma->cur, &i); |
3007 | if (error) | |
3008 | goto done; | |
c29aad41 | 3009 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3010 | error = xfs_btree_decrement(bma->cur, 0, &i); |
3011 | if (error) | |
3012 | goto done; | |
c29aad41 | 3013 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3014 | error = xfs_bmbt_update(bma->cur, left.br_startoff, |
3015 | left.br_startblock, | |
3016 | left.br_blockcount + | |
3017 | new->br_blockcount + | |
3018 | right.br_blockcount, | |
3019 | left.br_state); | |
3020 | if (error) | |
3021 | goto done; | |
3022 | } | |
3023 | break; | |
27a3f8f2 | 3024 | |
9e5987a7 DC |
3025 | case BMAP_LEFT_CONTIG: |
3026 | /* | |
3027 | * New allocation is contiguous with a real allocation | |
3028 | * on the left. | |
3029 | * Merge the new allocation with the left neighbor. | |
3030 | */ | |
3031 | --bma->idx; | |
3032 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3033 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
3034 | left.br_blockcount + new->br_blockcount); | |
3035 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1da177e4 | 3036 | |
9e5987a7 DC |
3037 | if (bma->cur == NULL) { |
3038 | rval = xfs_ilog_fext(whichfork); | |
3039 | } else { | |
3040 | rval = 0; | |
3041 | error = xfs_bmbt_lookup_eq(bma->cur, left.br_startoff, | |
3042 | left.br_startblock, left.br_blockcount, | |
3043 | &i); | |
3044 | if (error) | |
3045 | goto done; | |
c29aad41 | 3046 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3047 | error = xfs_bmbt_update(bma->cur, left.br_startoff, |
3048 | left.br_startblock, | |
3049 | left.br_blockcount + | |
3050 | new->br_blockcount, | |
3051 | left.br_state); | |
3052 | if (error) | |
3053 | goto done; | |
3054 | } | |
3055 | break; | |
27a3f8f2 | 3056 | |
9e5987a7 DC |
3057 | case BMAP_RIGHT_CONTIG: |
3058 | /* | |
3059 | * New allocation is contiguous with a real allocation | |
3060 | * on the right. | |
3061 | * Merge the new allocation with the right neighbor. | |
3062 | */ | |
3063 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3064 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx), | |
3065 | new->br_startoff, new->br_startblock, | |
3066 | new->br_blockcount + right.br_blockcount, | |
3067 | right.br_state); | |
3068 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
27a3f8f2 | 3069 | |
9e5987a7 DC |
3070 | if (bma->cur == NULL) { |
3071 | rval = xfs_ilog_fext(whichfork); | |
3072 | } else { | |
3073 | rval = 0; | |
3074 | error = xfs_bmbt_lookup_eq(bma->cur, | |
3075 | right.br_startoff, | |
3076 | right.br_startblock, | |
3077 | right.br_blockcount, &i); | |
3078 | if (error) | |
3079 | goto done; | |
c29aad41 | 3080 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3081 | error = xfs_bmbt_update(bma->cur, new->br_startoff, |
3082 | new->br_startblock, | |
3083 | new->br_blockcount + | |
3084 | right.br_blockcount, | |
3085 | right.br_state); | |
3086 | if (error) | |
3087 | goto done; | |
3088 | } | |
3089 | break; | |
3090 | ||
3091 | case 0: | |
3092 | /* | |
3093 | * New allocation is not contiguous with another | |
3094 | * real allocation. | |
3095 | * Insert a new entry. | |
3096 | */ | |
3097 | xfs_iext_insert(bma->ip, bma->idx, 1, new, state); | |
3098 | XFS_IFORK_NEXT_SET(bma->ip, whichfork, | |
3099 | XFS_IFORK_NEXTENTS(bma->ip, whichfork) + 1); | |
3100 | if (bma->cur == NULL) { | |
3101 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
3102 | } else { | |
3103 | rval = XFS_ILOG_CORE; | |
3104 | error = xfs_bmbt_lookup_eq(bma->cur, | |
3105 | new->br_startoff, | |
3106 | new->br_startblock, | |
3107 | new->br_blockcount, &i); | |
3108 | if (error) | |
3109 | goto done; | |
c29aad41 | 3110 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
3111 | bma->cur->bc_rec.b.br_state = new->br_state; |
3112 | error = xfs_btree_insert(bma->cur, &i); | |
3113 | if (error) | |
3114 | goto done; | |
c29aad41 | 3115 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3116 | } |
3117 | break; | |
3118 | } | |
3119 | ||
9c194644 DW |
3120 | /* add reverse mapping */ |
3121 | error = xfs_rmap_map_extent(mp, bma->dfops, bma->ip, whichfork, new); | |
3122 | if (error) | |
3123 | goto done; | |
3124 | ||
9e5987a7 DC |
3125 | /* convert to a btree if necessary */ |
3126 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { | |
3127 | int tmp_logflags; /* partial log flag return val */ | |
3128 | ||
3129 | ASSERT(bma->cur == NULL); | |
3130 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2c3234d1 | 3131 | bma->firstblock, bma->dfops, &bma->cur, |
9e5987a7 DC |
3132 | 0, &tmp_logflags, whichfork); |
3133 | bma->logflags |= tmp_logflags; | |
3134 | if (error) | |
3135 | goto done; | |
3136 | } | |
3137 | ||
3138 | /* clear out the allocated field, done with it now in any case. */ | |
3139 | if (bma->cur) | |
3140 | bma->cur->bc_private.b.allocated = 0; | |
3141 | ||
3142 | xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); | |
3143 | done: | |
3144 | bma->logflags |= rval; | |
3145 | return error; | |
1da177e4 LT |
3146 | } |
3147 | ||
3148 | /* | |
9e5987a7 | 3149 | * Functions used in the extent read, allocate and remove paths |
1da177e4 | 3150 | */ |
1da177e4 | 3151 | |
9e5987a7 DC |
3152 | /* |
3153 | * Adjust the size of the new extent based on di_extsize and rt extsize. | |
3154 | */ | |
68988114 | 3155 | int |
9e5987a7 DC |
3156 | xfs_bmap_extsize_align( |
3157 | xfs_mount_t *mp, | |
3158 | xfs_bmbt_irec_t *gotp, /* next extent pointer */ | |
3159 | xfs_bmbt_irec_t *prevp, /* previous extent pointer */ | |
3160 | xfs_extlen_t extsz, /* align to this extent size */ | |
3161 | int rt, /* is this a realtime inode? */ | |
3162 | int eof, /* is extent at end-of-file? */ | |
3163 | int delay, /* creating delalloc extent? */ | |
3164 | int convert, /* overwriting unwritten extent? */ | |
3165 | xfs_fileoff_t *offp, /* in/out: aligned offset */ | |
3166 | xfs_extlen_t *lenp) /* in/out: aligned length */ | |
4e8938fe | 3167 | { |
9e5987a7 DC |
3168 | xfs_fileoff_t orig_off; /* original offset */ |
3169 | xfs_extlen_t orig_alen; /* original length */ | |
3170 | xfs_fileoff_t orig_end; /* original off+len */ | |
3171 | xfs_fileoff_t nexto; /* next file offset */ | |
3172 | xfs_fileoff_t prevo; /* previous file offset */ | |
3173 | xfs_fileoff_t align_off; /* temp for offset */ | |
3174 | xfs_extlen_t align_alen; /* temp for length */ | |
3175 | xfs_extlen_t temp; /* temp for calculations */ | |
4e8938fe | 3176 | |
9e5987a7 | 3177 | if (convert) |
4e8938fe | 3178 | return 0; |
4e8938fe | 3179 | |
9e5987a7 DC |
3180 | orig_off = align_off = *offp; |
3181 | orig_alen = align_alen = *lenp; | |
3182 | orig_end = orig_off + orig_alen; | |
1da177e4 | 3183 | |
1da177e4 | 3184 | /* |
9e5987a7 DC |
3185 | * If this request overlaps an existing extent, then don't |
3186 | * attempt to perform any additional alignment. | |
1da177e4 | 3187 | */ |
9e5987a7 DC |
3188 | if (!delay && !eof && |
3189 | (orig_off >= gotp->br_startoff) && | |
3190 | (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { | |
3191 | return 0; | |
3192 | } | |
3193 | ||
1da177e4 | 3194 | /* |
9e5987a7 DC |
3195 | * If the file offset is unaligned vs. the extent size |
3196 | * we need to align it. This will be possible unless | |
3197 | * the file was previously written with a kernel that didn't | |
3198 | * perform this alignment, or if a truncate shot us in the | |
3199 | * foot. | |
1da177e4 | 3200 | */ |
9e5987a7 DC |
3201 | temp = do_mod(orig_off, extsz); |
3202 | if (temp) { | |
3203 | align_alen += temp; | |
3204 | align_off -= temp; | |
1da177e4 | 3205 | } |
6dea405e DC |
3206 | |
3207 | /* Same adjustment for the end of the requested area. */ | |
3208 | temp = (align_alen % extsz); | |
3209 | if (temp) | |
3210 | align_alen += extsz - temp; | |
3211 | ||
1da177e4 | 3212 | /* |
6dea405e DC |
3213 | * For large extent hint sizes, the aligned extent might be larger than |
3214 | * MAXEXTLEN. In that case, reduce the size by an extsz so that it pulls | |
3215 | * the length back under MAXEXTLEN. The outer allocation loops handle | |
3216 | * short allocation just fine, so it is safe to do this. We only want to | |
3217 | * do it when we are forced to, though, because it means more allocation | |
3218 | * operations are required. | |
1da177e4 | 3219 | */ |
6dea405e DC |
3220 | while (align_alen > MAXEXTLEN) |
3221 | align_alen -= extsz; | |
3222 | ASSERT(align_alen <= MAXEXTLEN); | |
3223 | ||
1da177e4 | 3224 | /* |
9e5987a7 DC |
3225 | * If the previous block overlaps with this proposed allocation |
3226 | * then move the start forward without adjusting the length. | |
1da177e4 | 3227 | */ |
9e5987a7 DC |
3228 | if (prevp->br_startoff != NULLFILEOFF) { |
3229 | if (prevp->br_startblock == HOLESTARTBLOCK) | |
3230 | prevo = prevp->br_startoff; | |
3231 | else | |
3232 | prevo = prevp->br_startoff + prevp->br_blockcount; | |
3233 | } else | |
3234 | prevo = 0; | |
3235 | if (align_off != orig_off && align_off < prevo) | |
3236 | align_off = prevo; | |
3237 | /* | |
3238 | * If the next block overlaps with this proposed allocation | |
3239 | * then move the start back without adjusting the length, | |
3240 | * but not before offset 0. | |
3241 | * This may of course make the start overlap previous block, | |
3242 | * and if we hit the offset 0 limit then the next block | |
3243 | * can still overlap too. | |
3244 | */ | |
3245 | if (!eof && gotp->br_startoff != NULLFILEOFF) { | |
3246 | if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || | |
3247 | (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) | |
3248 | nexto = gotp->br_startoff + gotp->br_blockcount; | |
3249 | else | |
3250 | nexto = gotp->br_startoff; | |
3251 | } else | |
3252 | nexto = NULLFILEOFF; | |
3253 | if (!eof && | |
3254 | align_off + align_alen != orig_end && | |
3255 | align_off + align_alen > nexto) | |
3256 | align_off = nexto > align_alen ? nexto - align_alen : 0; | |
3257 | /* | |
3258 | * If we're now overlapping the next or previous extent that | |
3259 | * means we can't fit an extsz piece in this hole. Just move | |
3260 | * the start forward to the first valid spot and set | |
3261 | * the length so we hit the end. | |
3262 | */ | |
3263 | if (align_off != orig_off && align_off < prevo) | |
3264 | align_off = prevo; | |
3265 | if (align_off + align_alen != orig_end && | |
3266 | align_off + align_alen > nexto && | |
3267 | nexto != NULLFILEOFF) { | |
3268 | ASSERT(nexto > prevo); | |
3269 | align_alen = nexto - align_off; | |
3270 | } | |
1da177e4 | 3271 | |
9e5987a7 DC |
3272 | /* |
3273 | * If realtime, and the result isn't a multiple of the realtime | |
3274 | * extent size we need to remove blocks until it is. | |
3275 | */ | |
3276 | if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { | |
1da177e4 | 3277 | /* |
9e5987a7 DC |
3278 | * We're not covering the original request, or |
3279 | * we won't be able to once we fix the length. | |
1da177e4 | 3280 | */ |
9e5987a7 DC |
3281 | if (orig_off < align_off || |
3282 | orig_end > align_off + align_alen || | |
3283 | align_alen - temp < orig_alen) | |
2451337d | 3284 | return -EINVAL; |
1da177e4 | 3285 | /* |
9e5987a7 | 3286 | * Try to fix it by moving the start up. |
1da177e4 | 3287 | */ |
9e5987a7 DC |
3288 | if (align_off + temp <= orig_off) { |
3289 | align_alen -= temp; | |
3290 | align_off += temp; | |
1da177e4 | 3291 | } |
9e5987a7 DC |
3292 | /* |
3293 | * Try to fix it by moving the end in. | |
3294 | */ | |
3295 | else if (align_off + align_alen - temp >= orig_end) | |
3296 | align_alen -= temp; | |
3297 | /* | |
3298 | * Set the start to the minimum then trim the length. | |
3299 | */ | |
3300 | else { | |
3301 | align_alen -= orig_off - align_off; | |
3302 | align_off = orig_off; | |
3303 | align_alen -= align_alen % mp->m_sb.sb_rextsize; | |
1da177e4 | 3304 | } |
1da177e4 | 3305 | /* |
9e5987a7 | 3306 | * Result doesn't cover the request, fail it. |
1da177e4 | 3307 | */ |
9e5987a7 | 3308 | if (orig_off < align_off || orig_end > align_off + align_alen) |
2451337d | 3309 | return -EINVAL; |
9e5987a7 DC |
3310 | } else { |
3311 | ASSERT(orig_off >= align_off); | |
6dea405e DC |
3312 | /* see MAXEXTLEN handling above */ |
3313 | ASSERT(orig_end <= align_off + align_alen || | |
3314 | align_alen + extsz > MAXEXTLEN); | |
1da177e4 | 3315 | } |
1da177e4 | 3316 | |
0b1b213f | 3317 | #ifdef DEBUG |
9e5987a7 DC |
3318 | if (!eof && gotp->br_startoff != NULLFILEOFF) |
3319 | ASSERT(align_off + align_alen <= gotp->br_startoff); | |
3320 | if (prevp->br_startoff != NULLFILEOFF) | |
3321 | ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); | |
3322 | #endif | |
1da177e4 | 3323 | |
9e5987a7 DC |
3324 | *lenp = align_alen; |
3325 | *offp = align_off; | |
3326 | return 0; | |
1da177e4 | 3327 | } |
1da177e4 | 3328 | |
9e5987a7 DC |
3329 | #define XFS_ALLOC_GAP_UNITS 4 |
3330 | ||
68988114 | 3331 | void |
9e5987a7 | 3332 | xfs_bmap_adjacent( |
68988114 | 3333 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
1da177e4 | 3334 | { |
9e5987a7 DC |
3335 | xfs_fsblock_t adjust; /* adjustment to block numbers */ |
3336 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ | |
3337 | xfs_mount_t *mp; /* mount point structure */ | |
3338 | int nullfb; /* true if ap->firstblock isn't set */ | |
3339 | int rt; /* true if inode is realtime */ | |
1da177e4 | 3340 | |
9e5987a7 DC |
3341 | #define ISVALID(x,y) \ |
3342 | (rt ? \ | |
3343 | (x) < mp->m_sb.sb_rblocks : \ | |
3344 | XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ | |
3345 | XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ | |
3346 | XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) | |
1da177e4 | 3347 | |
9e5987a7 DC |
3348 | mp = ap->ip->i_mount; |
3349 | nullfb = *ap->firstblock == NULLFSBLOCK; | |
3350 | rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata; | |
3351 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); | |
3352 | /* | |
3353 | * If allocating at eof, and there's a previous real block, | |
3354 | * try to use its last block as our starting point. | |
3355 | */ | |
3356 | if (ap->eof && ap->prev.br_startoff != NULLFILEOFF && | |
3357 | !isnullstartblock(ap->prev.br_startblock) && | |
3358 | ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount, | |
3359 | ap->prev.br_startblock)) { | |
3360 | ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount; | |
3361 | /* | |
3362 | * Adjust for the gap between prevp and us. | |
3363 | */ | |
3364 | adjust = ap->offset - | |
3365 | (ap->prev.br_startoff + ap->prev.br_blockcount); | |
3366 | if (adjust && | |
3367 | ISVALID(ap->blkno + adjust, ap->prev.br_startblock)) | |
3368 | ap->blkno += adjust; | |
3369 | } | |
3370 | /* | |
3371 | * If not at eof, then compare the two neighbor blocks. | |
3372 | * Figure out whether either one gives us a good starting point, | |
3373 | * and pick the better one. | |
3374 | */ | |
3375 | else if (!ap->eof) { | |
3376 | xfs_fsblock_t gotbno; /* right side block number */ | |
3377 | xfs_fsblock_t gotdiff=0; /* right side difference */ | |
3378 | xfs_fsblock_t prevbno; /* left side block number */ | |
3379 | xfs_fsblock_t prevdiff=0; /* left side difference */ | |
3380 | ||
3381 | /* | |
3382 | * If there's a previous (left) block, select a requested | |
3383 | * start block based on it. | |
3384 | */ | |
3385 | if (ap->prev.br_startoff != NULLFILEOFF && | |
3386 | !isnullstartblock(ap->prev.br_startblock) && | |
3387 | (prevbno = ap->prev.br_startblock + | |
3388 | ap->prev.br_blockcount) && | |
3389 | ISVALID(prevbno, ap->prev.br_startblock)) { | |
3390 | /* | |
3391 | * Calculate gap to end of previous block. | |
3392 | */ | |
3393 | adjust = prevdiff = ap->offset - | |
3394 | (ap->prev.br_startoff + | |
3395 | ap->prev.br_blockcount); | |
3396 | /* | |
3397 | * Figure the startblock based on the previous block's | |
3398 | * end and the gap size. | |
3399 | * Heuristic! | |
3400 | * If the gap is large relative to the piece we're | |
3401 | * allocating, or using it gives us an invalid block | |
3402 | * number, then just use the end of the previous block. | |
3403 | */ | |
3404 | if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length && | |
3405 | ISVALID(prevbno + prevdiff, | |
3406 | ap->prev.br_startblock)) | |
3407 | prevbno += adjust; | |
3408 | else | |
3409 | prevdiff += adjust; | |
3410 | /* | |
3411 | * If the firstblock forbids it, can't use it, | |
3412 | * must use default. | |
3413 | */ | |
3414 | if (!rt && !nullfb && | |
3415 | XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) | |
3416 | prevbno = NULLFSBLOCK; | |
1da177e4 | 3417 | } |
9e5987a7 DC |
3418 | /* |
3419 | * No previous block or can't follow it, just default. | |
3420 | */ | |
3421 | else | |
3422 | prevbno = NULLFSBLOCK; | |
3423 | /* | |
3424 | * If there's a following (right) block, select a requested | |
3425 | * start block based on it. | |
3426 | */ | |
3427 | if (!isnullstartblock(ap->got.br_startblock)) { | |
3428 | /* | |
3429 | * Calculate gap to start of next block. | |
3430 | */ | |
3431 | adjust = gotdiff = ap->got.br_startoff - ap->offset; | |
3432 | /* | |
3433 | * Figure the startblock based on the next block's | |
3434 | * start and the gap size. | |
3435 | */ | |
3436 | gotbno = ap->got.br_startblock; | |
3437 | /* | |
3438 | * Heuristic! | |
3439 | * If the gap is large relative to the piece we're | |
3440 | * allocating, or using it gives us an invalid block | |
3441 | * number, then just use the start of the next block | |
3442 | * offset by our length. | |
3443 | */ | |
3444 | if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length && | |
3445 | ISVALID(gotbno - gotdiff, gotbno)) | |
3446 | gotbno -= adjust; | |
3447 | else if (ISVALID(gotbno - ap->length, gotbno)) { | |
3448 | gotbno -= ap->length; | |
3449 | gotdiff += adjust - ap->length; | |
3450 | } else | |
3451 | gotdiff += adjust; | |
3452 | /* | |
3453 | * If the firstblock forbids it, can't use it, | |
3454 | * must use default. | |
3455 | */ | |
3456 | if (!rt && !nullfb && | |
3457 | XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) | |
3458 | gotbno = NULLFSBLOCK; | |
3459 | } | |
3460 | /* | |
3461 | * No next block, just default. | |
3462 | */ | |
3463 | else | |
3464 | gotbno = NULLFSBLOCK; | |
3465 | /* | |
3466 | * If both valid, pick the better one, else the only good | |
3467 | * one, else ap->blkno is already set (to 0 or the inode block). | |
3468 | */ | |
3469 | if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) | |
3470 | ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno; | |
3471 | else if (prevbno != NULLFSBLOCK) | |
3472 | ap->blkno = prevbno; | |
3473 | else if (gotbno != NULLFSBLOCK) | |
3474 | ap->blkno = gotbno; | |
1da177e4 | 3475 | } |
9e5987a7 | 3476 | #undef ISVALID |
1da177e4 | 3477 | } |
1da177e4 | 3478 | |
c977eb10 CH |
3479 | static int |
3480 | xfs_bmap_longest_free_extent( | |
3481 | struct xfs_trans *tp, | |
3482 | xfs_agnumber_t ag, | |
3483 | xfs_extlen_t *blen, | |
3484 | int *notinit) | |
3485 | { | |
3486 | struct xfs_mount *mp = tp->t_mountp; | |
3487 | struct xfs_perag *pag; | |
3488 | xfs_extlen_t longest; | |
3489 | int error = 0; | |
3490 | ||
3491 | pag = xfs_perag_get(mp, ag); | |
3492 | if (!pag->pagf_init) { | |
3493 | error = xfs_alloc_pagf_init(mp, tp, ag, XFS_ALLOC_FLAG_TRYLOCK); | |
3494 | if (error) | |
3495 | goto out; | |
3496 | ||
3497 | if (!pag->pagf_init) { | |
3498 | *notinit = 1; | |
3499 | goto out; | |
3500 | } | |
3501 | } | |
3502 | ||
50adbcb4 | 3503 | longest = xfs_alloc_longest_free_extent(mp, pag, |
496817b4 | 3504 | xfs_alloc_min_freelist(mp, pag)); |
c977eb10 CH |
3505 | if (*blen < longest) |
3506 | *blen = longest; | |
3507 | ||
3508 | out: | |
3509 | xfs_perag_put(pag); | |
3510 | return error; | |
3511 | } | |
3512 | ||
3513 | static void | |
3514 | xfs_bmap_select_minlen( | |
3515 | struct xfs_bmalloca *ap, | |
3516 | struct xfs_alloc_arg *args, | |
3517 | xfs_extlen_t *blen, | |
3518 | int notinit) | |
3519 | { | |
3520 | if (notinit || *blen < ap->minlen) { | |
3521 | /* | |
3522 | * Since we did a BUF_TRYLOCK above, it is possible that | |
3523 | * there is space for this request. | |
3524 | */ | |
3525 | args->minlen = ap->minlen; | |
3526 | } else if (*blen < args->maxlen) { | |
3527 | /* | |
3528 | * If the best seen length is less than the request length, | |
3529 | * use the best as the minimum. | |
3530 | */ | |
3531 | args->minlen = *blen; | |
3532 | } else { | |
3533 | /* | |
3534 | * Otherwise we've seen an extent as big as maxlen, use that | |
3535 | * as the minimum. | |
3536 | */ | |
3537 | args->minlen = args->maxlen; | |
3538 | } | |
3539 | } | |
3540 | ||
b64dfe4e | 3541 | STATIC int |
9e5987a7 DC |
3542 | xfs_bmap_btalloc_nullfb( |
3543 | struct xfs_bmalloca *ap, | |
3544 | struct xfs_alloc_arg *args, | |
3545 | xfs_extlen_t *blen) | |
b64dfe4e | 3546 | { |
9e5987a7 | 3547 | struct xfs_mount *mp = ap->ip->i_mount; |
9e5987a7 DC |
3548 | xfs_agnumber_t ag, startag; |
3549 | int notinit = 0; | |
b64dfe4e CH |
3550 | int error; |
3551 | ||
c977eb10 | 3552 | args->type = XFS_ALLOCTYPE_START_BNO; |
9e5987a7 | 3553 | args->total = ap->total; |
b64dfe4e | 3554 | |
9e5987a7 DC |
3555 | startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); |
3556 | if (startag == NULLAGNUMBER) | |
3557 | startag = ag = 0; | |
b64dfe4e | 3558 | |
9e5987a7 | 3559 | while (*blen < args->maxlen) { |
c977eb10 CH |
3560 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, |
3561 | ¬init); | |
3562 | if (error) | |
3563 | return error; | |
b64dfe4e | 3564 | |
9e5987a7 DC |
3565 | if (++ag == mp->m_sb.sb_agcount) |
3566 | ag = 0; | |
3567 | if (ag == startag) | |
3568 | break; | |
9e5987a7 | 3569 | } |
b64dfe4e | 3570 | |
c977eb10 CH |
3571 | xfs_bmap_select_minlen(ap, args, blen, notinit); |
3572 | return 0; | |
3573 | } | |
3574 | ||
3575 | STATIC int | |
3576 | xfs_bmap_btalloc_filestreams( | |
3577 | struct xfs_bmalloca *ap, | |
3578 | struct xfs_alloc_arg *args, | |
3579 | xfs_extlen_t *blen) | |
3580 | { | |
3581 | struct xfs_mount *mp = ap->ip->i_mount; | |
3582 | xfs_agnumber_t ag; | |
3583 | int notinit = 0; | |
3584 | int error; | |
3585 | ||
3586 | args->type = XFS_ALLOCTYPE_NEAR_BNO; | |
3587 | args->total = ap->total; | |
3588 | ||
3589 | ag = XFS_FSB_TO_AGNO(mp, args->fsbno); | |
3590 | if (ag == NULLAGNUMBER) | |
3591 | ag = 0; | |
3592 | ||
3593 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, ¬init); | |
3594 | if (error) | |
3595 | return error; | |
3596 | ||
3597 | if (*blen < args->maxlen) { | |
3598 | error = xfs_filestream_new_ag(ap, &ag); | |
3599 | if (error) | |
3600 | return error; | |
3601 | ||
3602 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, | |
3603 | ¬init); | |
3604 | if (error) | |
3605 | return error; | |
3606 | ||
3607 | } | |
3608 | ||
3609 | xfs_bmap_select_minlen(ap, args, blen, notinit); | |
b64dfe4e CH |
3610 | |
3611 | /* | |
c977eb10 CH |
3612 | * Set the failure fallback case to look in the selected AG as stream |
3613 | * may have moved. | |
b64dfe4e | 3614 | */ |
c977eb10 | 3615 | ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0); |
b64dfe4e | 3616 | return 0; |
b64dfe4e CH |
3617 | } |
3618 | ||
9e5987a7 DC |
3619 | STATIC int |
3620 | xfs_bmap_btalloc( | |
68988114 | 3621 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
4403280a | 3622 | { |
9e5987a7 DC |
3623 | xfs_mount_t *mp; /* mount point structure */ |
3624 | xfs_alloctype_t atype = 0; /* type for allocation routines */ | |
3625 | xfs_extlen_t align; /* minimum allocation alignment */ | |
3626 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ | |
3627 | xfs_agnumber_t ag; | |
3628 | xfs_alloc_arg_t args; | |
3629 | xfs_extlen_t blen; | |
3630 | xfs_extlen_t nextminlen = 0; | |
3631 | int nullfb; /* true if ap->firstblock isn't set */ | |
3632 | int isaligned; | |
3633 | int tryagain; | |
3634 | int error; | |
33177f05 | 3635 | int stripe_align; |
4403280a | 3636 | |
9e5987a7 | 3637 | ASSERT(ap->length); |
4403280a | 3638 | |
9e5987a7 | 3639 | mp = ap->ip->i_mount; |
33177f05 DC |
3640 | |
3641 | /* stripe alignment for allocation is determined by mount parameters */ | |
3642 | stripe_align = 0; | |
3643 | if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) | |
3644 | stripe_align = mp->m_swidth; | |
3645 | else if (mp->m_dalign) | |
3646 | stripe_align = mp->m_dalign; | |
3647 | ||
9e5987a7 DC |
3648 | align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0; |
3649 | if (unlikely(align)) { | |
3650 | error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, | |
3651 | align, 0, ap->eof, 0, ap->conv, | |
3652 | &ap->offset, &ap->length); | |
3653 | ASSERT(!error); | |
3654 | ASSERT(ap->length); | |
4403280a | 3655 | } |
33177f05 DC |
3656 | |
3657 | ||
9e5987a7 DC |
3658 | nullfb = *ap->firstblock == NULLFSBLOCK; |
3659 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); | |
3660 | if (nullfb) { | |
3661 | if (ap->userdata && xfs_inode_is_filestream(ap->ip)) { | |
3662 | ag = xfs_filestream_lookup_ag(ap->ip); | |
3663 | ag = (ag != NULLAGNUMBER) ? ag : 0; | |
3664 | ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); | |
3665 | } else { | |
3666 | ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); | |
3667 | } | |
3668 | } else | |
3669 | ap->blkno = *ap->firstblock; | |
4403280a | 3670 | |
9e5987a7 | 3671 | xfs_bmap_adjacent(ap); |
4403280a | 3672 | |
9e5987a7 DC |
3673 | /* |
3674 | * If allowed, use ap->blkno; otherwise must use firstblock since | |
3675 | * it's in the right allocation group. | |
3676 | */ | |
3677 | if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) | |
3678 | ; | |
3679 | else | |
3680 | ap->blkno = *ap->firstblock; | |
3681 | /* | |
3682 | * Normal allocation, done through xfs_alloc_vextent. | |
3683 | */ | |
3684 | tryagain = isaligned = 0; | |
3685 | memset(&args, 0, sizeof(args)); | |
3686 | args.tp = ap->tp; | |
3687 | args.mp = mp; | |
3688 | args.fsbno = ap->blkno; | |
340785cc | 3689 | xfs_rmap_skip_owner_update(&args.oinfo); |
4403280a | 3690 | |
9e5987a7 | 3691 | /* Trim the allocation back to the maximum an AG can fit. */ |
52548852 | 3692 | args.maxlen = MIN(ap->length, mp->m_ag_max_usable); |
9e5987a7 DC |
3693 | args.firstblock = *ap->firstblock; |
3694 | blen = 0; | |
3695 | if (nullfb) { | |
c977eb10 CH |
3696 | /* |
3697 | * Search for an allocation group with a single extent large | |
3698 | * enough for the request. If one isn't found, then adjust | |
3699 | * the minimum allocation size to the largest space found. | |
3700 | */ | |
3701 | if (ap->userdata && xfs_inode_is_filestream(ap->ip)) | |
3702 | error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); | |
3703 | else | |
3704 | error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); | |
4403280a CH |
3705 | if (error) |
3706 | return error; | |
2c3234d1 | 3707 | } else if (ap->dfops->dop_low) { |
9e5987a7 DC |
3708 | if (xfs_inode_is_filestream(ap->ip)) |
3709 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
3710 | else | |
3711 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3712 | args.total = args.minlen = ap->minlen; | |
3713 | } else { | |
3714 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
3715 | args.total = ap->total; | |
3716 | args.minlen = ap->minlen; | |
4403280a | 3717 | } |
9e5987a7 DC |
3718 | /* apply extent size hints if obtained earlier */ |
3719 | if (unlikely(align)) { | |
3720 | args.prod = align; | |
3721 | if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod))) | |
3722 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
09cbfeaf | 3723 | } else if (mp->m_sb.sb_blocksize >= PAGE_SIZE) { |
9e5987a7 DC |
3724 | args.prod = 1; |
3725 | args.mod = 0; | |
3726 | } else { | |
09cbfeaf | 3727 | args.prod = PAGE_SIZE >> mp->m_sb.sb_blocklog; |
9e5987a7 DC |
3728 | if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod)))) |
3729 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
4403280a | 3730 | } |
7e47a4ef | 3731 | /* |
9e5987a7 DC |
3732 | * If we are not low on available data blocks, and the |
3733 | * underlying logical volume manager is a stripe, and | |
3734 | * the file offset is zero then try to allocate data | |
3735 | * blocks on stripe unit boundary. | |
3736 | * NOTE: ap->aeof is only set if the allocation length | |
3737 | * is >= the stripe unit and the allocation offset is | |
3738 | * at the end of file. | |
7e47a4ef | 3739 | */ |
2c3234d1 | 3740 | if (!ap->dfops->dop_low && ap->aeof) { |
9e5987a7 | 3741 | if (!ap->offset) { |
33177f05 | 3742 | args.alignment = stripe_align; |
9e5987a7 DC |
3743 | atype = args.type; |
3744 | isaligned = 1; | |
3745 | /* | |
3746 | * Adjust for alignment | |
3747 | */ | |
3748 | if (blen > args.alignment && blen <= args.maxlen) | |
3749 | args.minlen = blen - args.alignment; | |
3750 | args.minalignslop = 0; | |
3751 | } else { | |
3752 | /* | |
3753 | * First try an exact bno allocation. | |
3754 | * If it fails then do a near or start bno | |
3755 | * allocation with alignment turned on. | |
3756 | */ | |
3757 | atype = args.type; | |
3758 | tryagain = 1; | |
3759 | args.type = XFS_ALLOCTYPE_THIS_BNO; | |
3760 | args.alignment = 1; | |
3761 | /* | |
3762 | * Compute the minlen+alignment for the | |
3763 | * next case. Set slop so that the value | |
3764 | * of minlen+alignment+slop doesn't go up | |
3765 | * between the calls. | |
3766 | */ | |
33177f05 DC |
3767 | if (blen > stripe_align && blen <= args.maxlen) |
3768 | nextminlen = blen - stripe_align; | |
9e5987a7 DC |
3769 | else |
3770 | nextminlen = args.minlen; | |
33177f05 | 3771 | if (nextminlen + stripe_align > args.minlen + 1) |
9e5987a7 | 3772 | args.minalignslop = |
33177f05 | 3773 | nextminlen + stripe_align - |
9e5987a7 DC |
3774 | args.minlen - 1; |
3775 | else | |
3776 | args.minalignslop = 0; | |
7e47a4ef DC |
3777 | } |
3778 | } else { | |
9e5987a7 DC |
3779 | args.alignment = 1; |
3780 | args.minalignslop = 0; | |
7e47a4ef | 3781 | } |
9e5987a7 DC |
3782 | args.minleft = ap->minleft; |
3783 | args.wasdel = ap->wasdel; | |
3784 | args.isfl = 0; | |
3785 | args.userdata = ap->userdata; | |
3fbbbea3 DC |
3786 | if (ap->userdata & XFS_ALLOC_USERDATA_ZERO) |
3787 | args.ip = ap->ip; | |
3788 | ||
3789 | error = xfs_alloc_vextent(&args); | |
3790 | if (error) | |
9e5987a7 | 3791 | return error; |
3fbbbea3 | 3792 | |
9e5987a7 DC |
3793 | if (tryagain && args.fsbno == NULLFSBLOCK) { |
3794 | /* | |
3795 | * Exact allocation failed. Now try with alignment | |
3796 | * turned on. | |
3797 | */ | |
3798 | args.type = atype; | |
3799 | args.fsbno = ap->blkno; | |
33177f05 | 3800 | args.alignment = stripe_align; |
9e5987a7 DC |
3801 | args.minlen = nextminlen; |
3802 | args.minalignslop = 0; | |
3803 | isaligned = 1; | |
3804 | if ((error = xfs_alloc_vextent(&args))) | |
3805 | return error; | |
7e47a4ef | 3806 | } |
9e5987a7 DC |
3807 | if (isaligned && args.fsbno == NULLFSBLOCK) { |
3808 | /* | |
3809 | * allocation failed, so turn off alignment and | |
3810 | * try again. | |
3811 | */ | |
3812 | args.type = atype; | |
3813 | args.fsbno = ap->blkno; | |
3814 | args.alignment = 0; | |
3815 | if ((error = xfs_alloc_vextent(&args))) | |
7e47a4ef DC |
3816 | return error; |
3817 | } | |
9e5987a7 DC |
3818 | if (args.fsbno == NULLFSBLOCK && nullfb && |
3819 | args.minlen > ap->minlen) { | |
3820 | args.minlen = ap->minlen; | |
3821 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3822 | args.fsbno = ap->blkno; | |
3823 | if ((error = xfs_alloc_vextent(&args))) | |
3824 | return error; | |
7e47a4ef | 3825 | } |
9e5987a7 DC |
3826 | if (args.fsbno == NULLFSBLOCK && nullfb) { |
3827 | args.fsbno = 0; | |
3828 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
3829 | args.total = ap->minlen; | |
3830 | args.minleft = 0; | |
3831 | if ((error = xfs_alloc_vextent(&args))) | |
3832 | return error; | |
2c3234d1 | 3833 | ap->dfops->dop_low = true; |
9e5987a7 DC |
3834 | } |
3835 | if (args.fsbno != NULLFSBLOCK) { | |
3836 | /* | |
3837 | * check the allocation happened at the same or higher AG than | |
3838 | * the first block that was allocated. | |
3839 | */ | |
3840 | ASSERT(*ap->firstblock == NULLFSBLOCK || | |
3841 | XFS_FSB_TO_AGNO(mp, *ap->firstblock) == | |
3842 | XFS_FSB_TO_AGNO(mp, args.fsbno) || | |
2c3234d1 | 3843 | (ap->dfops->dop_low && |
9e5987a7 DC |
3844 | XFS_FSB_TO_AGNO(mp, *ap->firstblock) < |
3845 | XFS_FSB_TO_AGNO(mp, args.fsbno))); | |
7e47a4ef | 3846 | |
9e5987a7 DC |
3847 | ap->blkno = args.fsbno; |
3848 | if (*ap->firstblock == NULLFSBLOCK) | |
3849 | *ap->firstblock = args.fsbno; | |
3850 | ASSERT(nullfb || fb_agno == args.agno || | |
2c3234d1 | 3851 | (ap->dfops->dop_low && fb_agno < args.agno)); |
9e5987a7 DC |
3852 | ap->length = args.len; |
3853 | ap->ip->i_d.di_nblocks += args.len; | |
3854 | xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); | |
3855 | if (ap->wasdel) | |
3856 | ap->ip->i_delayed_blks -= args.len; | |
3857 | /* | |
3858 | * Adjust the disk quota also. This was reserved | |
3859 | * earlier. | |
3860 | */ | |
3861 | xfs_trans_mod_dquot_byino(ap->tp, ap->ip, | |
3862 | ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : | |
3863 | XFS_TRANS_DQ_BCOUNT, | |
3864 | (long) args.len); | |
3865 | } else { | |
3866 | ap->blkno = NULLFSBLOCK; | |
3867 | ap->length = 0; | |
3868 | } | |
3869 | return 0; | |
3870 | } | |
7e47a4ef | 3871 | |
9e5987a7 DC |
3872 | /* |
3873 | * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. | |
3874 | * It figures out where to ask the underlying allocator to put the new extent. | |
3875 | */ | |
3876 | STATIC int | |
3877 | xfs_bmap_alloc( | |
68988114 | 3878 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
9e5987a7 DC |
3879 | { |
3880 | if (XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata) | |
3881 | return xfs_bmap_rtalloc(ap); | |
3882 | return xfs_bmap_btalloc(ap); | |
3883 | } | |
a5bd606b | 3884 | |
9e5987a7 DC |
3885 | /* |
3886 | * Trim the returned map to the required bounds | |
3887 | */ | |
3888 | STATIC void | |
3889 | xfs_bmapi_trim_map( | |
3890 | struct xfs_bmbt_irec *mval, | |
3891 | struct xfs_bmbt_irec *got, | |
3892 | xfs_fileoff_t *bno, | |
3893 | xfs_filblks_t len, | |
3894 | xfs_fileoff_t obno, | |
3895 | xfs_fileoff_t end, | |
3896 | int n, | |
3897 | int flags) | |
3898 | { | |
3899 | if ((flags & XFS_BMAPI_ENTIRE) || | |
3900 | got->br_startoff + got->br_blockcount <= obno) { | |
3901 | *mval = *got; | |
3902 | if (isnullstartblock(got->br_startblock)) | |
3903 | mval->br_startblock = DELAYSTARTBLOCK; | |
3904 | return; | |
3905 | } | |
7e47a4ef | 3906 | |
9e5987a7 DC |
3907 | if (obno > *bno) |
3908 | *bno = obno; | |
3909 | ASSERT((*bno >= obno) || (n == 0)); | |
3910 | ASSERT(*bno < end); | |
3911 | mval->br_startoff = *bno; | |
3912 | if (isnullstartblock(got->br_startblock)) | |
3913 | mval->br_startblock = DELAYSTARTBLOCK; | |
3914 | else | |
3915 | mval->br_startblock = got->br_startblock + | |
3916 | (*bno - got->br_startoff); | |
7e47a4ef | 3917 | /* |
9e5987a7 DC |
3918 | * Return the minimum of what we got and what we asked for for |
3919 | * the length. We can use the len variable here because it is | |
3920 | * modified below and we could have been there before coming | |
3921 | * here if the first part of the allocation didn't overlap what | |
3922 | * was asked for. | |
7e47a4ef | 3923 | */ |
9e5987a7 DC |
3924 | mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno, |
3925 | got->br_blockcount - (*bno - got->br_startoff)); | |
3926 | mval->br_state = got->br_state; | |
3927 | ASSERT(mval->br_blockcount <= len); | |
3928 | return; | |
7e47a4ef DC |
3929 | } |
3930 | ||
9e5987a7 DC |
3931 | /* |
3932 | * Update and validate the extent map to return | |
3933 | */ | |
3934 | STATIC void | |
3935 | xfs_bmapi_update_map( | |
3936 | struct xfs_bmbt_irec **map, | |
3937 | xfs_fileoff_t *bno, | |
3938 | xfs_filblks_t *len, | |
3939 | xfs_fileoff_t obno, | |
3940 | xfs_fileoff_t end, | |
3941 | int *n, | |
3942 | int flags) | |
e04426b9 | 3943 | { |
9e5987a7 | 3944 | xfs_bmbt_irec_t *mval = *map; |
e04426b9 | 3945 | |
9e5987a7 DC |
3946 | ASSERT((flags & XFS_BMAPI_ENTIRE) || |
3947 | ((mval->br_startoff + mval->br_blockcount) <= end)); | |
3948 | ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) || | |
3949 | (mval->br_startoff < obno)); | |
e04426b9 | 3950 | |
9e5987a7 DC |
3951 | *bno = mval->br_startoff + mval->br_blockcount; |
3952 | *len = end - *bno; | |
3953 | if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) { | |
3954 | /* update previous map with new information */ | |
3955 | ASSERT(mval->br_startblock == mval[-1].br_startblock); | |
3956 | ASSERT(mval->br_blockcount > mval[-1].br_blockcount); | |
3957 | ASSERT(mval->br_state == mval[-1].br_state); | |
3958 | mval[-1].br_blockcount = mval->br_blockcount; | |
3959 | mval[-1].br_state = mval->br_state; | |
3960 | } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK && | |
3961 | mval[-1].br_startblock != DELAYSTARTBLOCK && | |
3962 | mval[-1].br_startblock != HOLESTARTBLOCK && | |
3963 | mval->br_startblock == mval[-1].br_startblock + | |
3964 | mval[-1].br_blockcount && | |
3965 | ((flags & XFS_BMAPI_IGSTATE) || | |
3966 | mval[-1].br_state == mval->br_state)) { | |
3967 | ASSERT(mval->br_startoff == | |
3968 | mval[-1].br_startoff + mval[-1].br_blockcount); | |
3969 | mval[-1].br_blockcount += mval->br_blockcount; | |
3970 | } else if (*n > 0 && | |
3971 | mval->br_startblock == DELAYSTARTBLOCK && | |
3972 | mval[-1].br_startblock == DELAYSTARTBLOCK && | |
3973 | mval->br_startoff == | |
3974 | mval[-1].br_startoff + mval[-1].br_blockcount) { | |
3975 | mval[-1].br_blockcount += mval->br_blockcount; | |
3976 | mval[-1].br_state = mval->br_state; | |
3977 | } else if (!((*n == 0) && | |
3978 | ((mval->br_startoff + mval->br_blockcount) <= | |
3979 | obno))) { | |
3980 | mval++; | |
3981 | (*n)++; | |
3982 | } | |
3983 | *map = mval; | |
e04426b9 DC |
3984 | } |
3985 | ||
3986 | /* | |
9e5987a7 | 3987 | * Map file blocks to filesystem blocks without allocation. |
e04426b9 DC |
3988 | */ |
3989 | int | |
9e5987a7 DC |
3990 | xfs_bmapi_read( |
3991 | struct xfs_inode *ip, | |
3992 | xfs_fileoff_t bno, | |
b447fe5a | 3993 | xfs_filblks_t len, |
9e5987a7 DC |
3994 | struct xfs_bmbt_irec *mval, |
3995 | int *nmap, | |
c315c90b | 3996 | int flags) |
b447fe5a | 3997 | { |
9e5987a7 DC |
3998 | struct xfs_mount *mp = ip->i_mount; |
3999 | struct xfs_ifork *ifp; | |
4000 | struct xfs_bmbt_irec got; | |
4001 | struct xfs_bmbt_irec prev; | |
4002 | xfs_fileoff_t obno; | |
4003 | xfs_fileoff_t end; | |
4004 | xfs_extnum_t lastx; | |
4005 | int error; | |
4006 | int eof; | |
4007 | int n = 0; | |
b447fe5a DC |
4008 | int whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
4009 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
b447fe5a | 4010 | |
9e5987a7 DC |
4011 | ASSERT(*nmap >= 1); |
4012 | ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE| | |
4013 | XFS_BMAPI_IGSTATE))); | |
eef334e5 | 4014 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)); |
b447fe5a | 4015 | |
9e5987a7 DC |
4016 | if (unlikely(XFS_TEST_ERROR( |
4017 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
4018 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
4019 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
4020 | XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 4021 | return -EFSCORRUPTED; |
9e5987a7 | 4022 | } |
b447fe5a | 4023 | |
9e5987a7 | 4024 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4025 | return -EIO; |
9e5987a7 | 4026 | |
ff6d6af2 | 4027 | XFS_STATS_INC(mp, xs_blk_mapr); |
9e5987a7 DC |
4028 | |
4029 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4030 | ||
4031 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
4032 | error = xfs_iread_extents(NULL, ip, whichfork); | |
4033 | if (error) | |
4034 | return error; | |
b447fe5a | 4035 | } |
b447fe5a | 4036 | |
9e5987a7 DC |
4037 | xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, &prev); |
4038 | end = bno + len; | |
4039 | obno = bno; | |
b447fe5a | 4040 | |
9e5987a7 DC |
4041 | while (bno < end && n < *nmap) { |
4042 | /* Reading past eof, act as though there's a hole up to end. */ | |
4043 | if (eof) | |
4044 | got.br_startoff = end; | |
4045 | if (got.br_startoff > bno) { | |
4046 | /* Reading in a hole. */ | |
4047 | mval->br_startoff = bno; | |
4048 | mval->br_startblock = HOLESTARTBLOCK; | |
4049 | mval->br_blockcount = | |
4050 | XFS_FILBLKS_MIN(len, got.br_startoff - bno); | |
4051 | mval->br_state = XFS_EXT_NORM; | |
4052 | bno += mval->br_blockcount; | |
4053 | len -= mval->br_blockcount; | |
4054 | mval++; | |
4055 | n++; | |
4056 | continue; | |
4057 | } | |
b447fe5a | 4058 | |
9e5987a7 DC |
4059 | /* set up the extent map to return. */ |
4060 | xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); | |
4061 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); | |
4062 | ||
4063 | /* If we're done, stop now. */ | |
4064 | if (bno >= end || n >= *nmap) | |
4065 | break; | |
4066 | ||
4067 | /* Else go on to the next record. */ | |
4068 | if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) | |
4069 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got); | |
4070 | else | |
4071 | eof = 1; | |
4072 | } | |
4073 | *nmap = n; | |
b447fe5a DC |
4074 | return 0; |
4075 | } | |
4076 | ||
9e5987a7 DC |
4077 | STATIC int |
4078 | xfs_bmapi_reserve_delalloc( | |
4079 | struct xfs_inode *ip, | |
4080 | xfs_fileoff_t aoff, | |
4081 | xfs_filblks_t len, | |
4082 | struct xfs_bmbt_irec *got, | |
4083 | struct xfs_bmbt_irec *prev, | |
4084 | xfs_extnum_t *lastx, | |
4085 | int eof) | |
1da177e4 | 4086 | { |
c0dc7828 | 4087 | struct xfs_mount *mp = ip->i_mount; |
9e5987a7 DC |
4088 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
4089 | xfs_extlen_t alen; | |
4090 | xfs_extlen_t indlen; | |
4091 | char rt = XFS_IS_REALTIME_INODE(ip); | |
4092 | xfs_extlen_t extsz; | |
4093 | int error; | |
c0dc7828 | 4094 | |
9e5987a7 DC |
4095 | alen = XFS_FILBLKS_MIN(len, MAXEXTLEN); |
4096 | if (!eof) | |
4097 | alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff); | |
1da177e4 | 4098 | |
9e5987a7 DC |
4099 | /* Figure out the extent size, adjust alen */ |
4100 | extsz = xfs_get_extsz_hint(ip); | |
4101 | if (extsz) { | |
9e5987a7 DC |
4102 | error = xfs_bmap_extsize_align(mp, got, prev, extsz, rt, eof, |
4103 | 1, 0, &aoff, &alen); | |
4104 | ASSERT(!error); | |
4105 | } | |
4106 | ||
4107 | if (rt) | |
4108 | extsz = alen / mp->m_sb.sb_rextsize; | |
4109 | ||
4110 | /* | |
4111 | * Make a transaction-less quota reservation for delayed allocation | |
4112 | * blocks. This number gets adjusted later. We return if we haven't | |
4113 | * allocated blocks already inside this loop. | |
4114 | */ | |
4115 | error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0, | |
4116 | rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); | |
4117 | if (error) | |
4118 | return error; | |
4119 | ||
4120 | /* | |
4121 | * Split changing sb for alen and indlen since they could be coming | |
4122 | * from different places. | |
4123 | */ | |
4124 | indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen); | |
4125 | ASSERT(indlen > 0); | |
4126 | ||
4127 | if (rt) { | |
bab98bbe | 4128 | error = xfs_mod_frextents(mp, -((int64_t)extsz)); |
9e5987a7 | 4129 | } else { |
0d485ada | 4130 | error = xfs_mod_fdblocks(mp, -((int64_t)alen), false); |
9e5987a7 DC |
4131 | } |
4132 | ||
4133 | if (error) | |
4134 | goto out_unreserve_quota; | |
4135 | ||
0d485ada | 4136 | error = xfs_mod_fdblocks(mp, -((int64_t)indlen), false); |
9e5987a7 DC |
4137 | if (error) |
4138 | goto out_unreserve_blocks; | |
4139 | ||
4140 | ||
4141 | ip->i_delayed_blks += alen; | |
4142 | ||
4143 | got->br_startoff = aoff; | |
4144 | got->br_startblock = nullstartblock(indlen); | |
4145 | got->br_blockcount = alen; | |
4146 | got->br_state = XFS_EXT_NORM; | |
4147 | xfs_bmap_add_extent_hole_delay(ip, lastx, got); | |
4148 | ||
4149 | /* | |
4150 | * Update our extent pointer, given that xfs_bmap_add_extent_hole_delay | |
4151 | * might have merged it into one of the neighbouring ones. | |
4152 | */ | |
4153 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *lastx), got); | |
4154 | ||
4155 | ASSERT(got->br_startoff <= aoff); | |
4156 | ASSERT(got->br_startoff + got->br_blockcount >= aoff + alen); | |
4157 | ASSERT(isnullstartblock(got->br_startblock)); | |
4158 | ASSERT(got->br_state == XFS_EXT_NORM); | |
4159 | return 0; | |
4160 | ||
4161 | out_unreserve_blocks: | |
4162 | if (rt) | |
bab98bbe | 4163 | xfs_mod_frextents(mp, extsz); |
9e5987a7 | 4164 | else |
0d485ada | 4165 | xfs_mod_fdblocks(mp, alen, false); |
9e5987a7 DC |
4166 | out_unreserve_quota: |
4167 | if (XFS_IS_QUOTA_ON(mp)) | |
4168 | xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ? | |
4169 | XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); | |
4170 | return error; | |
4171 | } | |
4172 | ||
4173 | /* | |
4174 | * Map file blocks to filesystem blocks, adding delayed allocations as needed. | |
4175 | */ | |
4176 | int | |
4177 | xfs_bmapi_delay( | |
4178 | struct xfs_inode *ip, /* incore inode */ | |
4179 | xfs_fileoff_t bno, /* starting file offs. mapped */ | |
4180 | xfs_filblks_t len, /* length to map in file */ | |
4181 | struct xfs_bmbt_irec *mval, /* output: map values */ | |
4182 | int *nmap, /* i/o: mval size/count */ | |
4183 | int flags) /* XFS_BMAPI_... */ | |
4184 | { | |
4185 | struct xfs_mount *mp = ip->i_mount; | |
4186 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
4187 | struct xfs_bmbt_irec got; /* current file extent record */ | |
4188 | struct xfs_bmbt_irec prev; /* previous file extent record */ | |
4189 | xfs_fileoff_t obno; /* old block number (offset) */ | |
4190 | xfs_fileoff_t end; /* end of mapped file region */ | |
4191 | xfs_extnum_t lastx; /* last useful extent number */ | |
4192 | int eof; /* we've hit the end of extents */ | |
4193 | int n = 0; /* current extent index */ | |
4194 | int error = 0; | |
c0dc7828 | 4195 | |
1da177e4 | 4196 | ASSERT(*nmap >= 1); |
c0dc7828 | 4197 | ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); |
9e5987a7 | 4198 | ASSERT(!(flags & ~XFS_BMAPI_ENTIRE)); |
eef334e5 | 4199 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
c0dc7828 | 4200 | |
1da177e4 | 4201 | if (unlikely(XFS_TEST_ERROR( |
9e5987a7 DC |
4202 | (XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS && |
4203 | XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE), | |
1da177e4 | 4204 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { |
9e5987a7 | 4205 | XFS_ERROR_REPORT("xfs_bmapi_delay", XFS_ERRLEVEL_LOW, mp); |
2451337d | 4206 | return -EFSCORRUPTED; |
1da177e4 | 4207 | } |
c0dc7828 | 4208 | |
1da177e4 | 4209 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4210 | return -EIO; |
c0dc7828 | 4211 | |
ff6d6af2 | 4212 | XFS_STATS_INC(mp, xs_blk_mapw); |
c0dc7828 | 4213 | |
c0dc7828 | 4214 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { |
9e5987a7 | 4215 | error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK); |
c0dc7828 | 4216 | if (error) |
9e5987a7 | 4217 | return error; |
c0dc7828 DC |
4218 | } |
4219 | ||
9e5987a7 | 4220 | xfs_bmap_search_extents(ip, bno, XFS_DATA_FORK, &eof, &lastx, &got, &prev); |
1da177e4 LT |
4221 | end = bno + len; |
4222 | obno = bno; | |
7e47a4ef | 4223 | |
1da177e4 | 4224 | while (bno < end && n < *nmap) { |
9e5987a7 DC |
4225 | if (eof || got.br_startoff > bno) { |
4226 | error = xfs_bmapi_reserve_delalloc(ip, bno, len, &got, | |
4227 | &prev, &lastx, eof); | |
4228 | if (error) { | |
4229 | if (n == 0) { | |
4230 | *nmap = 0; | |
4231 | return error; | |
4232 | } | |
4233 | break; | |
4234 | } | |
4235 | } | |
c0dc7828 | 4236 | |
9e5987a7 DC |
4237 | /* set up the extent map to return. */ |
4238 | xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); | |
aef9a895 DC |
4239 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); |
4240 | ||
9e5987a7 DC |
4241 | /* If we're done, stop now. */ |
4242 | if (bno >= end || n >= *nmap) | |
1da177e4 | 4243 | break; |
c0dc7828 DC |
4244 | |
4245 | /* Else go on to the next record. */ | |
9e5987a7 DC |
4246 | prev = got; |
4247 | if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) | |
4248 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got); | |
4249 | else | |
5690f921 | 4250 | eof = 1; |
1da177e4 | 4251 | } |
9e5987a7 | 4252 | |
1da177e4 | 4253 | *nmap = n; |
9e5987a7 DC |
4254 | return 0; |
4255 | } | |
c0dc7828 | 4256 | |
c315c90b | 4257 | |
cf11da9c DC |
4258 | static int |
4259 | xfs_bmapi_allocate( | |
9e5987a7 DC |
4260 | struct xfs_bmalloca *bma) |
4261 | { | |
4262 | struct xfs_mount *mp = bma->ip->i_mount; | |
4263 | int whichfork = (bma->flags & XFS_BMAPI_ATTRFORK) ? | |
4264 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
4265 | struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); | |
4266 | int tmp_logflags = 0; | |
4267 | int error; | |
9e5987a7 DC |
4268 | |
4269 | ASSERT(bma->length > 0); | |
4270 | ||
1da177e4 | 4271 | /* |
9e5987a7 DC |
4272 | * For the wasdelay case, we could also just allocate the stuff asked |
4273 | * for in this bmap call but that wouldn't be as good. | |
1da177e4 | 4274 | */ |
9e5987a7 DC |
4275 | if (bma->wasdel) { |
4276 | bma->length = (xfs_extlen_t)bma->got.br_blockcount; | |
4277 | bma->offset = bma->got.br_startoff; | |
4278 | if (bma->idx != NULLEXTNUM && bma->idx) { | |
4279 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), | |
4280 | &bma->prev); | |
1da177e4 | 4281 | } |
9e5987a7 DC |
4282 | } else { |
4283 | bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN); | |
4284 | if (!bma->eof) | |
4285 | bma->length = XFS_FILBLKS_MIN(bma->length, | |
4286 | bma->got.br_startoff - bma->offset); | |
1da177e4 | 4287 | } |
1da177e4 | 4288 | |
9e5987a7 DC |
4289 | /* |
4290 | * Indicate if this is the first user data in the file, or just any | |
3fbbbea3 DC |
4291 | * user data. And if it is userdata, indicate whether it needs to |
4292 | * be initialised to zero during allocation. | |
9e5987a7 DC |
4293 | */ |
4294 | if (!(bma->flags & XFS_BMAPI_METADATA)) { | |
4295 | bma->userdata = (bma->offset == 0) ? | |
4296 | XFS_ALLOC_INITIAL_USER_DATA : XFS_ALLOC_USERDATA; | |
3fbbbea3 DC |
4297 | if (bma->flags & XFS_BMAPI_ZERO) |
4298 | bma->userdata |= XFS_ALLOC_USERDATA_ZERO; | |
9e5987a7 | 4299 | } |
1da177e4 | 4300 | |
9e5987a7 | 4301 | bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1; |
0b1b213f | 4302 | |
9e5987a7 DC |
4303 | /* |
4304 | * Only want to do the alignment at the eof if it is userdata and | |
4305 | * allocation length is larger than a stripe unit. | |
4306 | */ | |
4307 | if (mp->m_dalign && bma->length >= mp->m_dalign && | |
4308 | !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) { | |
4309 | error = xfs_bmap_isaeof(bma, whichfork); | |
4310 | if (error) | |
4311 | return error; | |
1da177e4 | 4312 | } |
8096b1eb | 4313 | |
9e5987a7 DC |
4314 | error = xfs_bmap_alloc(bma); |
4315 | if (error) | |
1da177e4 | 4316 | return error; |
9e5987a7 | 4317 | |
2c3234d1 | 4318 | if (bma->dfops->dop_low) |
9e5987a7 DC |
4319 | bma->minleft = 0; |
4320 | if (bma->cur) | |
4321 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
4322 | if (bma->blkno == NULLFSBLOCK) | |
1da177e4 | 4323 | return 0; |
9e5987a7 DC |
4324 | if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { |
4325 | bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork); | |
4326 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
2c3234d1 | 4327 | bma->cur->bc_private.b.dfops = bma->dfops; |
1da177e4 | 4328 | } |
9e5987a7 DC |
4329 | /* |
4330 | * Bump the number of extents we've allocated | |
4331 | * in this call. | |
4332 | */ | |
4333 | bma->nallocs++; | |
4334 | ||
4335 | if (bma->cur) | |
4336 | bma->cur->bc_private.b.flags = | |
4337 | bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; | |
4338 | ||
4339 | bma->got.br_startoff = bma->offset; | |
4340 | bma->got.br_startblock = bma->blkno; | |
4341 | bma->got.br_blockcount = bma->length; | |
4342 | bma->got.br_state = XFS_EXT_NORM; | |
b4e9181e | 4343 | |
1da177e4 | 4344 | /* |
9e5987a7 DC |
4345 | * A wasdelay extent has been initialized, so shouldn't be flagged |
4346 | * as unwritten. | |
1da177e4 | 4347 | */ |
9e5987a7 DC |
4348 | if (!bma->wasdel && (bma->flags & XFS_BMAPI_PREALLOC) && |
4349 | xfs_sb_version_hasextflgbit(&mp->m_sb)) | |
4350 | bma->got.br_state = XFS_EXT_UNWRITTEN; | |
4351 | ||
4352 | if (bma->wasdel) | |
4353 | error = xfs_bmap_add_extent_delay_real(bma); | |
4354 | else | |
4355 | error = xfs_bmap_add_extent_hole_real(bma, whichfork); | |
4356 | ||
4357 | bma->logflags |= tmp_logflags; | |
4358 | if (error) | |
4359 | return error; | |
4360 | ||
4361 | /* | |
4362 | * Update our extent pointer, given that xfs_bmap_add_extent_delay_real | |
4363 | * or xfs_bmap_add_extent_hole_real might have merged it into one of | |
4364 | * the neighbouring ones. | |
4365 | */ | |
4366 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); | |
4367 | ||
4368 | ASSERT(bma->got.br_startoff <= bma->offset); | |
4369 | ASSERT(bma->got.br_startoff + bma->got.br_blockcount >= | |
4370 | bma->offset + bma->length); | |
4371 | ASSERT(bma->got.br_state == XFS_EXT_NORM || | |
4372 | bma->got.br_state == XFS_EXT_UNWRITTEN); | |
4373 | return 0; | |
4374 | } | |
4375 | ||
9e5987a7 DC |
4376 | STATIC int |
4377 | xfs_bmapi_convert_unwritten( | |
4378 | struct xfs_bmalloca *bma, | |
4379 | struct xfs_bmbt_irec *mval, | |
4380 | xfs_filblks_t len, | |
4381 | int flags) | |
4382 | { | |
4383 | int whichfork = (flags & XFS_BMAPI_ATTRFORK) ? | |
4384 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
4385 | struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); | |
4386 | int tmp_logflags = 0; | |
4387 | int error; | |
4388 | ||
4389 | /* check if we need to do unwritten->real conversion */ | |
4390 | if (mval->br_state == XFS_EXT_UNWRITTEN && | |
4391 | (flags & XFS_BMAPI_PREALLOC)) | |
4392 | return 0; | |
4393 | ||
4394 | /* check if we need to do real->unwritten conversion */ | |
4395 | if (mval->br_state == XFS_EXT_NORM && | |
4396 | (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) != | |
4397 | (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) | |
4398 | return 0; | |
4399 | ||
4400 | /* | |
4401 | * Modify (by adding) the state flag, if writing. | |
4402 | */ | |
4403 | ASSERT(mval->br_blockcount <= len); | |
4404 | if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { | |
4405 | bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp, | |
4406 | bma->ip, whichfork); | |
4407 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
2c3234d1 | 4408 | bma->cur->bc_private.b.dfops = bma->dfops; |
1da177e4 | 4409 | } |
9e5987a7 DC |
4410 | mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN) |
4411 | ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN; | |
5575acc7 | 4412 | |
3fbbbea3 DC |
4413 | /* |
4414 | * Before insertion into the bmbt, zero the range being converted | |
4415 | * if required. | |
4416 | */ | |
4417 | if (flags & XFS_BMAPI_ZERO) { | |
4418 | error = xfs_zero_extent(bma->ip, mval->br_startblock, | |
4419 | mval->br_blockcount); | |
4420 | if (error) | |
4421 | return error; | |
4422 | } | |
4423 | ||
9e5987a7 | 4424 | error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, &bma->idx, |
2c3234d1 | 4425 | &bma->cur, mval, bma->firstblock, bma->dfops, |
9e5987a7 | 4426 | &tmp_logflags); |
2e588a46 BF |
4427 | /* |
4428 | * Log the inode core unconditionally in the unwritten extent conversion | |
4429 | * path because the conversion might not have done so (e.g., if the | |
4430 | * extent count hasn't changed). We need to make sure the inode is dirty | |
4431 | * in the transaction for the sake of fsync(), even if nothing has | |
4432 | * changed, because fsync() will not force the log for this transaction | |
4433 | * unless it sees the inode pinned. | |
4434 | */ | |
4435 | bma->logflags |= tmp_logflags | XFS_ILOG_CORE; | |
9e5987a7 DC |
4436 | if (error) |
4437 | return error; | |
4438 | ||
4439 | /* | |
4440 | * Update our extent pointer, given that | |
4441 | * xfs_bmap_add_extent_unwritten_real might have merged it into one | |
4442 | * of the neighbouring ones. | |
4443 | */ | |
4444 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); | |
4445 | ||
4446 | /* | |
4447 | * We may have combined previously unwritten space with written space, | |
4448 | * so generate another request. | |
4449 | */ | |
4450 | if (mval->br_blockcount < len) | |
2451337d | 4451 | return -EAGAIN; |
9e5987a7 DC |
4452 | return 0; |
4453 | } | |
4454 | ||
4455 | /* | |
4456 | * Map file blocks to filesystem blocks, and allocate blocks or convert the | |
4457 | * extent state if necessary. Details behaviour is controlled by the flags | |
4458 | * parameter. Only allocates blocks from a single allocation group, to avoid | |
4459 | * locking problems. | |
4460 | * | |
4461 | * The returned value in "firstblock" from the first call in a transaction | |
4462 | * must be remembered and presented to subsequent calls in "firstblock". | |
4463 | * An upper bound for the number of blocks to be allocated is supplied to | |
4464 | * the first call in "total"; if no allocation group has that many free | |
4465 | * blocks then the call will fail (return NULLFSBLOCK in "firstblock"). | |
4466 | */ | |
4467 | int | |
4468 | xfs_bmapi_write( | |
4469 | struct xfs_trans *tp, /* transaction pointer */ | |
4470 | struct xfs_inode *ip, /* incore inode */ | |
4471 | xfs_fileoff_t bno, /* starting file offs. mapped */ | |
4472 | xfs_filblks_t len, /* length to map in file */ | |
4473 | int flags, /* XFS_BMAPI_... */ | |
4474 | xfs_fsblock_t *firstblock, /* first allocated block | |
4475 | controls a.g. for allocs */ | |
4476 | xfs_extlen_t total, /* total blocks needed */ | |
4477 | struct xfs_bmbt_irec *mval, /* output: map values */ | |
4478 | int *nmap, /* i/o: mval size/count */ | |
2c3234d1 | 4479 | struct xfs_defer_ops *dfops) /* i/o: list extents to free */ |
9e5987a7 DC |
4480 | { |
4481 | struct xfs_mount *mp = ip->i_mount; | |
4482 | struct xfs_ifork *ifp; | |
a30b0367 | 4483 | struct xfs_bmalloca bma = { NULL }; /* args for xfs_bmap_alloc */ |
9e5987a7 DC |
4484 | xfs_fileoff_t end; /* end of mapped file region */ |
4485 | int eof; /* after the end of extents */ | |
4486 | int error; /* error return */ | |
4487 | int n; /* current extent index */ | |
4488 | xfs_fileoff_t obno; /* old block number (offset) */ | |
4489 | int whichfork; /* data or attr fork */ | |
4490 | char inhole; /* current location is hole in file */ | |
4491 | char wasdelay; /* old extent was delayed */ | |
4492 | ||
4493 | #ifdef DEBUG | |
4494 | xfs_fileoff_t orig_bno; /* original block number value */ | |
4495 | int orig_flags; /* original flags arg value */ | |
4496 | xfs_filblks_t orig_len; /* original value of len arg */ | |
4497 | struct xfs_bmbt_irec *orig_mval; /* original value of mval */ | |
4498 | int orig_nmap; /* original value of *nmap */ | |
4499 | ||
4500 | orig_bno = bno; | |
4501 | orig_len = len; | |
4502 | orig_flags = flags; | |
4503 | orig_mval = mval; | |
4504 | orig_nmap = *nmap; | |
4505 | #endif | |
f3508bcd DC |
4506 | whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
4507 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
9e5987a7 DC |
4508 | |
4509 | ASSERT(*nmap >= 1); | |
4510 | ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); | |
4511 | ASSERT(!(flags & XFS_BMAPI_IGSTATE)); | |
4512 | ASSERT(tp != NULL); | |
4513 | ASSERT(len > 0); | |
f3508bcd | 4514 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL); |
eef334e5 | 4515 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
9e5987a7 | 4516 | |
3fbbbea3 DC |
4517 | /* zeroing is for currently only for data extents, not metadata */ |
4518 | ASSERT((flags & (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)) != | |
4519 | (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)); | |
4520 | /* | |
4521 | * we can allocate unwritten extents or pre-zero allocated blocks, | |
4522 | * but it makes no sense to do both at once. This would result in | |
4523 | * zeroing the unwritten extent twice, but it still being an | |
4524 | * unwritten extent.... | |
4525 | */ | |
4526 | ASSERT((flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)) != | |
4527 | (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)); | |
4528 | ||
9e5987a7 DC |
4529 | if (unlikely(XFS_TEST_ERROR( |
4530 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
f3508bcd | 4531 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), |
9e5987a7 DC |
4532 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { |
4533 | XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 4534 | return -EFSCORRUPTED; |
5575acc7 KD |
4535 | } |
4536 | ||
9e5987a7 | 4537 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4538 | return -EIO; |
9e5987a7 DC |
4539 | |
4540 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4541 | ||
ff6d6af2 | 4542 | XFS_STATS_INC(mp, xs_blk_mapw); |
9e5987a7 | 4543 | |
9e5987a7 DC |
4544 | if (*firstblock == NULLFSBLOCK) { |
4545 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE) | |
4546 | bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
4547 | else | |
4548 | bma.minleft = 1; | |
4549 | } else { | |
4550 | bma.minleft = 0; | |
4551 | } | |
4552 | ||
4553 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
4554 | error = xfs_iread_extents(tp, ip, whichfork); | |
4555 | if (error) | |
4556 | goto error0; | |
4557 | } | |
4558 | ||
4559 | xfs_bmap_search_extents(ip, bno, whichfork, &eof, &bma.idx, &bma.got, | |
4560 | &bma.prev); | |
4561 | n = 0; | |
4562 | end = bno + len; | |
4563 | obno = bno; | |
4564 | ||
4565 | bma.tp = tp; | |
4566 | bma.ip = ip; | |
4567 | bma.total = total; | |
4568 | bma.userdata = 0; | |
2c3234d1 | 4569 | bma.dfops = dfops; |
9e5987a7 DC |
4570 | bma.firstblock = firstblock; |
4571 | ||
9e5987a7 DC |
4572 | while (bno < end && n < *nmap) { |
4573 | inhole = eof || bma.got.br_startoff > bno; | |
4574 | wasdelay = !inhole && isnullstartblock(bma.got.br_startblock); | |
4575 | ||
1da177e4 | 4576 | /* |
9e5987a7 DC |
4577 | * First, deal with the hole before the allocated space |
4578 | * that we found, if any. | |
1da177e4 | 4579 | */ |
9e5987a7 DC |
4580 | if (inhole || wasdelay) { |
4581 | bma.eof = eof; | |
4582 | bma.conv = !!(flags & XFS_BMAPI_CONVERT); | |
4583 | bma.wasdel = wasdelay; | |
4584 | bma.offset = bno; | |
4585 | bma.flags = flags; | |
4586 | ||
1da177e4 | 4587 | /* |
9e5987a7 DC |
4588 | * There's a 32/64 bit type mismatch between the |
4589 | * allocation length request (which can be 64 bits in | |
4590 | * length) and the bma length request, which is | |
4591 | * xfs_extlen_t and therefore 32 bits. Hence we have to | |
4592 | * check for 32-bit overflows and handle them here. | |
1da177e4 | 4593 | */ |
9e5987a7 DC |
4594 | if (len > (xfs_filblks_t)MAXEXTLEN) |
4595 | bma.length = MAXEXTLEN; | |
4596 | else | |
4597 | bma.length = len; | |
4598 | ||
4599 | ASSERT(len > 0); | |
4600 | ASSERT(bma.length > 0); | |
4601 | error = xfs_bmapi_allocate(&bma); | |
1da177e4 LT |
4602 | if (error) |
4603 | goto error0; | |
9e5987a7 DC |
4604 | if (bma.blkno == NULLFSBLOCK) |
4605 | break; | |
1da177e4 | 4606 | } |
9e5987a7 DC |
4607 | |
4608 | /* Deal with the allocated space we found. */ | |
4609 | xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno, | |
4610 | end, n, flags); | |
4611 | ||
4612 | /* Execute unwritten extent conversion if necessary */ | |
4613 | error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags); | |
2451337d | 4614 | if (error == -EAGAIN) |
9e5987a7 DC |
4615 | continue; |
4616 | if (error) | |
4617 | goto error0; | |
4618 | ||
4619 | /* update the extent map to return */ | |
4620 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); | |
4621 | ||
4622 | /* | |
4623 | * If we're done, stop now. Stop when we've allocated | |
4624 | * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise | |
4625 | * the transaction may get too big. | |
4626 | */ | |
4627 | if (bno >= end || n >= *nmap || bma.nallocs >= *nmap) | |
4628 | break; | |
4629 | ||
4630 | /* Else go on to the next record. */ | |
4631 | bma.prev = bma.got; | |
4632 | if (++bma.idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) { | |
4633 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma.idx), | |
4634 | &bma.got); | |
4635 | } else | |
4636 | eof = 1; | |
4637 | } | |
4638 | *nmap = n; | |
4639 | ||
4640 | /* | |
4641 | * Transform from btree to extents, give it cur. | |
4642 | */ | |
4643 | if (xfs_bmap_wants_extents(ip, whichfork)) { | |
4644 | int tmp_logflags = 0; | |
4645 | ||
4646 | ASSERT(bma.cur); | |
4647 | error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, | |
4648 | &tmp_logflags, whichfork); | |
4649 | bma.logflags |= tmp_logflags; | |
4650 | if (error) | |
4651 | goto error0; | |
4652 | } | |
4653 | ||
4654 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE || | |
4655 | XFS_IFORK_NEXTENTS(ip, whichfork) > | |
4656 | XFS_IFORK_MAXEXT(ip, whichfork)); | |
4657 | error = 0; | |
4658 | error0: | |
4659 | /* | |
4660 | * Log everything. Do this after conversion, there's no point in | |
4661 | * logging the extent records if we've converted to btree format. | |
4662 | */ | |
4663 | if ((bma.logflags & xfs_ilog_fext(whichfork)) && | |
4664 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
4665 | bma.logflags &= ~xfs_ilog_fext(whichfork); | |
4666 | else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) && | |
4667 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) | |
4668 | bma.logflags &= ~xfs_ilog_fbroot(whichfork); | |
4669 | /* | |
4670 | * Log whatever the flags say, even if error. Otherwise we might miss | |
4671 | * detecting a case where the data is changed, there's an error, | |
4672 | * and it's not logged so we don't shutdown when we should. | |
4673 | */ | |
4674 | if (bma.logflags) | |
4675 | xfs_trans_log_inode(tp, ip, bma.logflags); | |
4676 | ||
4677 | if (bma.cur) { | |
4678 | if (!error) { | |
4679 | ASSERT(*firstblock == NULLFSBLOCK || | |
4680 | XFS_FSB_TO_AGNO(mp, *firstblock) == | |
4681 | XFS_FSB_TO_AGNO(mp, | |
4682 | bma.cur->bc_private.b.firstblock) || | |
2c3234d1 | 4683 | (dfops->dop_low && |
9e5987a7 DC |
4684 | XFS_FSB_TO_AGNO(mp, *firstblock) < |
4685 | XFS_FSB_TO_AGNO(mp, | |
4686 | bma.cur->bc_private.b.firstblock))); | |
4687 | *firstblock = bma.cur->bc_private.b.firstblock; | |
1da177e4 | 4688 | } |
9e5987a7 DC |
4689 | xfs_btree_del_cursor(bma.cur, |
4690 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
4691 | } | |
4692 | if (!error) | |
4693 | xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, | |
4694 | orig_nmap, *nmap); | |
4695 | return error; | |
4696 | } | |
06d10dd9 | 4697 | |
a9bd24ac BF |
4698 | /* |
4699 | * When a delalloc extent is split (e.g., due to a hole punch), the original | |
4700 | * indlen reservation must be shared across the two new extents that are left | |
4701 | * behind. | |
4702 | * | |
4703 | * Given the original reservation and the worst case indlen for the two new | |
4704 | * extents (as calculated by xfs_bmap_worst_indlen()), split the original | |
d34999c9 BF |
4705 | * reservation fairly across the two new extents. If necessary, steal available |
4706 | * blocks from a deleted extent to make up a reservation deficiency (e.g., if | |
4707 | * ores == 1). The number of stolen blocks is returned. The availability and | |
4708 | * subsequent accounting of stolen blocks is the responsibility of the caller. | |
a9bd24ac | 4709 | */ |
d34999c9 | 4710 | static xfs_filblks_t |
a9bd24ac BF |
4711 | xfs_bmap_split_indlen( |
4712 | xfs_filblks_t ores, /* original res. */ | |
4713 | xfs_filblks_t *indlen1, /* ext1 worst indlen */ | |
d34999c9 BF |
4714 | xfs_filblks_t *indlen2, /* ext2 worst indlen */ |
4715 | xfs_filblks_t avail) /* stealable blocks */ | |
a9bd24ac BF |
4716 | { |
4717 | xfs_filblks_t len1 = *indlen1; | |
4718 | xfs_filblks_t len2 = *indlen2; | |
4719 | xfs_filblks_t nres = len1 + len2; /* new total res. */ | |
d34999c9 BF |
4720 | xfs_filblks_t stolen = 0; |
4721 | ||
4722 | /* | |
4723 | * Steal as many blocks as we can to try and satisfy the worst case | |
4724 | * indlen for both new extents. | |
4725 | */ | |
4726 | while (nres > ores && avail) { | |
4727 | nres--; | |
4728 | avail--; | |
4729 | stolen++; | |
4730 | } | |
a9bd24ac BF |
4731 | |
4732 | /* | |
d34999c9 BF |
4733 | * The only blocks available are those reserved for the original |
4734 | * extent and what we can steal from the extent being removed. | |
4735 | * If this still isn't enough to satisfy the combined | |
4736 | * requirements for the two new extents, skim blocks off of each | |
4737 | * of the new reservations until they match what is available. | |
a9bd24ac BF |
4738 | */ |
4739 | while (nres > ores) { | |
4740 | if (len1) { | |
4741 | len1--; | |
4742 | nres--; | |
4743 | } | |
4744 | if (nres == ores) | |
4745 | break; | |
4746 | if (len2) { | |
4747 | len2--; | |
4748 | nres--; | |
4749 | } | |
4750 | } | |
4751 | ||
4752 | *indlen1 = len1; | |
4753 | *indlen2 = len2; | |
d34999c9 BF |
4754 | |
4755 | return stolen; | |
a9bd24ac BF |
4756 | } |
4757 | ||
9e5987a7 DC |
4758 | /* |
4759 | * Called by xfs_bmapi to update file extent records and the btree | |
4760 | * after removing space (or undoing a delayed allocation). | |
4761 | */ | |
4762 | STATIC int /* error */ | |
4763 | xfs_bmap_del_extent( | |
4764 | xfs_inode_t *ip, /* incore inode pointer */ | |
4765 | xfs_trans_t *tp, /* current transaction pointer */ | |
4766 | xfs_extnum_t *idx, /* extent number to update/delete */ | |
2c3234d1 | 4767 | struct xfs_defer_ops *dfops, /* list of extents to be freed */ |
9e5987a7 DC |
4768 | xfs_btree_cur_t *cur, /* if null, not a btree */ |
4769 | xfs_bmbt_irec_t *del, /* data to remove from extents */ | |
4770 | int *logflagsp, /* inode logging flags */ | |
4771 | int whichfork) /* data or attr fork */ | |
4772 | { | |
4773 | xfs_filblks_t da_new; /* new delay-alloc indirect blocks */ | |
4774 | xfs_filblks_t da_old; /* old delay-alloc indirect blocks */ | |
4775 | xfs_fsblock_t del_endblock=0; /* first block past del */ | |
4776 | xfs_fileoff_t del_endoff; /* first offset past del */ | |
4777 | int delay; /* current block is delayed allocated */ | |
4778 | int do_fx; /* free extent at end of routine */ | |
4779 | xfs_bmbt_rec_host_t *ep; /* current extent entry pointer */ | |
4780 | int error; /* error return value */ | |
4781 | int flags; /* inode logging flags */ | |
4782 | xfs_bmbt_irec_t got; /* current extent entry */ | |
4783 | xfs_fileoff_t got_endoff; /* first offset past got */ | |
4784 | int i; /* temp state */ | |
4785 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
4786 | xfs_mount_t *mp; /* mount structure */ | |
4787 | xfs_filblks_t nblks; /* quota/sb block count */ | |
4788 | xfs_bmbt_irec_t new; /* new record to be inserted */ | |
4789 | /* REFERENCED */ | |
4790 | uint qfield; /* quota field to update */ | |
4791 | xfs_filblks_t temp; /* for indirect length calculations */ | |
4792 | xfs_filblks_t temp2; /* for indirect length calculations */ | |
4793 | int state = 0; | |
4794 | ||
ff6d6af2 BD |
4795 | mp = ip->i_mount; |
4796 | XFS_STATS_INC(mp, xs_del_exlist); | |
9e5987a7 DC |
4797 | |
4798 | if (whichfork == XFS_ATTR_FORK) | |
4799 | state |= BMAP_ATTRFORK; | |
4800 | ||
9e5987a7 DC |
4801 | ifp = XFS_IFORK_PTR(ip, whichfork); |
4802 | ASSERT((*idx >= 0) && (*idx < ifp->if_bytes / | |
4803 | (uint)sizeof(xfs_bmbt_rec_t))); | |
4804 | ASSERT(del->br_blockcount > 0); | |
4805 | ep = xfs_iext_get_ext(ifp, *idx); | |
4806 | xfs_bmbt_get_all(ep, &got); | |
4807 | ASSERT(got.br_startoff <= del->br_startoff); | |
4808 | del_endoff = del->br_startoff + del->br_blockcount; | |
4809 | got_endoff = got.br_startoff + got.br_blockcount; | |
4810 | ASSERT(got_endoff >= del_endoff); | |
4811 | delay = isnullstartblock(got.br_startblock); | |
4812 | ASSERT(isnullstartblock(del->br_startblock) == delay); | |
4813 | flags = 0; | |
4814 | qfield = 0; | |
4815 | error = 0; | |
4816 | /* | |
4817 | * If deleting a real allocation, must free up the disk space. | |
4818 | */ | |
4819 | if (!delay) { | |
4820 | flags = XFS_ILOG_CORE; | |
4821 | /* | |
4822 | * Realtime allocation. Free it and record di_nblocks update. | |
4823 | */ | |
4824 | if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { | |
4825 | xfs_fsblock_t bno; | |
4826 | xfs_filblks_t len; | |
4827 | ||
4828 | ASSERT(do_mod(del->br_blockcount, | |
4829 | mp->m_sb.sb_rextsize) == 0); | |
4830 | ASSERT(do_mod(del->br_startblock, | |
4831 | mp->m_sb.sb_rextsize) == 0); | |
4832 | bno = del->br_startblock; | |
4833 | len = del->br_blockcount; | |
4834 | do_div(bno, mp->m_sb.sb_rextsize); | |
4835 | do_div(len, mp->m_sb.sb_rextsize); | |
4836 | error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); | |
4837 | if (error) | |
4838 | goto done; | |
4839 | do_fx = 0; | |
4840 | nblks = len * mp->m_sb.sb_rextsize; | |
4841 | qfield = XFS_TRANS_DQ_RTBCOUNT; | |
4842 | } | |
1da177e4 | 4843 | /* |
9e5987a7 | 4844 | * Ordinary allocation. |
1da177e4 | 4845 | */ |
9e5987a7 DC |
4846 | else { |
4847 | do_fx = 1; | |
4848 | nblks = del->br_blockcount; | |
4849 | qfield = XFS_TRANS_DQ_BCOUNT; | |
1da177e4 | 4850 | } |
1da177e4 | 4851 | /* |
9e5987a7 | 4852 | * Set up del_endblock and cur for later. |
1da177e4 | 4853 | */ |
9e5987a7 DC |
4854 | del_endblock = del->br_startblock + del->br_blockcount; |
4855 | if (cur) { | |
4856 | if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
4857 | got.br_startblock, got.br_blockcount, | |
4858 | &i))) | |
4859 | goto done; | |
c29aad41 | 4860 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 4861 | } |
9e5987a7 DC |
4862 | da_old = da_new = 0; |
4863 | } else { | |
4864 | da_old = startblockval(got.br_startblock); | |
4865 | da_new = 0; | |
4866 | nblks = 0; | |
4867 | do_fx = 0; | |
1da177e4 | 4868 | } |
340785cc | 4869 | |
1da177e4 | 4870 | /* |
9e5987a7 DC |
4871 | * Set flag value to use in switch statement. |
4872 | * Left-contig is 2, right-contig is 1. | |
1da177e4 | 4873 | */ |
9e5987a7 DC |
4874 | switch (((got.br_startoff == del->br_startoff) << 1) | |
4875 | (got_endoff == del_endoff)) { | |
4876 | case 3: | |
4877 | /* | |
4878 | * Matches the whole extent. Delete the entry. | |
4879 | */ | |
4880 | xfs_iext_remove(ip, *idx, 1, | |
4881 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0); | |
4882 | --*idx; | |
4883 | if (delay) | |
4884 | break; | |
4885 | ||
4886 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
4887 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
4888 | flags |= XFS_ILOG_CORE; | |
4889 | if (!cur) { | |
4890 | flags |= xfs_ilog_fext(whichfork); | |
4891 | break; | |
4892 | } | |
4893 | if ((error = xfs_btree_delete(cur, &i))) | |
4894 | goto done; | |
c29aad41 | 4895 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
4896 | break; |
4897 | ||
4898 | case 2: | |
4899 | /* | |
4900 | * Deleting the first part of the extent. | |
4901 | */ | |
4902 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4903 | xfs_bmbt_set_startoff(ep, del_endoff); | |
4904 | temp = got.br_blockcount - del->br_blockcount; | |
4905 | xfs_bmbt_set_blockcount(ep, temp); | |
4906 | if (delay) { | |
4907 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
4908 | da_old); | |
4909 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
4910 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4911 | da_new = temp; | |
4912 | break; | |
4913 | } | |
4914 | xfs_bmbt_set_startblock(ep, del_endblock); | |
4915 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4916 | if (!cur) { | |
4917 | flags |= xfs_ilog_fext(whichfork); | |
4918 | break; | |
4919 | } | |
4920 | if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock, | |
4921 | got.br_blockcount - del->br_blockcount, | |
4922 | got.br_state))) | |
4923 | goto done; | |
4924 | break; | |
4925 | ||
4926 | case 1: | |
4927 | /* | |
4928 | * Deleting the last part of the extent. | |
4929 | */ | |
4930 | temp = got.br_blockcount - del->br_blockcount; | |
4931 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4932 | xfs_bmbt_set_blockcount(ep, temp); | |
4933 | if (delay) { | |
4934 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
4935 | da_old); | |
4936 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
4937 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4938 | da_new = temp; | |
4939 | break; | |
4940 | } | |
4941 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4942 | if (!cur) { | |
4943 | flags |= xfs_ilog_fext(whichfork); | |
4944 | break; | |
4945 | } | |
4946 | if ((error = xfs_bmbt_update(cur, got.br_startoff, | |
4947 | got.br_startblock, | |
4948 | got.br_blockcount - del->br_blockcount, | |
4949 | got.br_state))) | |
4950 | goto done; | |
4951 | break; | |
4952 | ||
4953 | case 0: | |
4954 | /* | |
4955 | * Deleting the middle of the extent. | |
4956 | */ | |
4957 | temp = del->br_startoff - got.br_startoff; | |
4958 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4959 | xfs_bmbt_set_blockcount(ep, temp); | |
4960 | new.br_startoff = del_endoff; | |
4961 | temp2 = got_endoff - del_endoff; | |
4962 | new.br_blockcount = temp2; | |
4963 | new.br_state = got.br_state; | |
4964 | if (!delay) { | |
4965 | new.br_startblock = del_endblock; | |
4966 | flags |= XFS_ILOG_CORE; | |
4967 | if (cur) { | |
4968 | if ((error = xfs_bmbt_update(cur, | |
4969 | got.br_startoff, | |
4970 | got.br_startblock, temp, | |
4971 | got.br_state))) | |
4972 | goto done; | |
4973 | if ((error = xfs_btree_increment(cur, 0, &i))) | |
4974 | goto done; | |
4975 | cur->bc_rec.b = new; | |
4976 | error = xfs_btree_insert(cur, &i); | |
2451337d | 4977 | if (error && error != -ENOSPC) |
9e5987a7 DC |
4978 | goto done; |
4979 | /* | |
4980 | * If get no-space back from btree insert, | |
4981 | * it tried a split, and we have a zero | |
4982 | * block reservation. | |
4983 | * Fix up our state and return the error. | |
4984 | */ | |
2451337d | 4985 | if (error == -ENOSPC) { |
9e5987a7 DC |
4986 | /* |
4987 | * Reset the cursor, don't trust | |
4988 | * it after any insert operation. | |
4989 | */ | |
4990 | if ((error = xfs_bmbt_lookup_eq(cur, | |
4991 | got.br_startoff, | |
4992 | got.br_startblock, | |
4993 | temp, &i))) | |
4994 | goto done; | |
c29aad41 ES |
4995 | XFS_WANT_CORRUPTED_GOTO(mp, |
4996 | i == 1, done); | |
9e5987a7 DC |
4997 | /* |
4998 | * Update the btree record back | |
4999 | * to the original value. | |
5000 | */ | |
5001 | if ((error = xfs_bmbt_update(cur, | |
5002 | got.br_startoff, | |
5003 | got.br_startblock, | |
5004 | got.br_blockcount, | |
5005 | got.br_state))) | |
5006 | goto done; | |
5007 | /* | |
5008 | * Reset the extent record back | |
5009 | * to the original value. | |
5010 | */ | |
5011 | xfs_bmbt_set_blockcount(ep, | |
5012 | got.br_blockcount); | |
5013 | flags = 0; | |
2451337d | 5014 | error = -ENOSPC; |
9e5987a7 DC |
5015 | goto done; |
5016 | } | |
c29aad41 | 5017 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
5018 | } else |
5019 | flags |= xfs_ilog_fext(whichfork); | |
5020 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
5021 | XFS_IFORK_NEXTENTS(ip, whichfork) + 1); | |
5022 | } else { | |
d34999c9 | 5023 | xfs_filblks_t stolen; |
9e5987a7 | 5024 | ASSERT(whichfork == XFS_DATA_FORK); |
a9bd24ac BF |
5025 | |
5026 | /* | |
5027 | * Distribute the original indlen reservation across the | |
d34999c9 BF |
5028 | * two new extents. Steal blocks from the deleted extent |
5029 | * if necessary. Stealing blocks simply fudges the | |
5030 | * fdblocks accounting in xfs_bunmapi(). | |
a9bd24ac BF |
5031 | */ |
5032 | temp = xfs_bmap_worst_indlen(ip, got.br_blockcount); | |
5033 | temp2 = xfs_bmap_worst_indlen(ip, new.br_blockcount); | |
d34999c9 BF |
5034 | stolen = xfs_bmap_split_indlen(da_old, &temp, &temp2, |
5035 | del->br_blockcount); | |
5036 | da_new = temp + temp2 - stolen; | |
5037 | del->br_blockcount -= stolen; | |
a9bd24ac BF |
5038 | |
5039 | /* | |
d34999c9 BF |
5040 | * Set the reservation for each extent. Warn if either |
5041 | * is zero as this can lead to delalloc problems. | |
a9bd24ac | 5042 | */ |
d34999c9 | 5043 | WARN_ON_ONCE(!temp || !temp2); |
9e5987a7 | 5044 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); |
9e5987a7 | 5045 | new.br_startblock = nullstartblock((int)temp2); |
9e5987a7 DC |
5046 | } |
5047 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
5048 | xfs_iext_insert(ip, *idx + 1, 1, &new, state); | |
5049 | ++*idx; | |
5050 | break; | |
1da177e4 | 5051 | } |
9c194644 DW |
5052 | |
5053 | /* remove reverse mapping */ | |
5054 | if (!delay) { | |
5055 | error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, del); | |
5056 | if (error) | |
5057 | goto done; | |
5058 | } | |
5059 | ||
1da177e4 | 5060 | /* |
9e5987a7 | 5061 | * If we need to, add to list of extents to delete. |
1da177e4 | 5062 | */ |
9e5987a7 | 5063 | if (do_fx) |
2c3234d1 | 5064 | xfs_bmap_add_free(mp, dfops, del->br_startblock, |
340785cc | 5065 | del->br_blockcount, NULL); |
1da177e4 | 5066 | /* |
9e5987a7 | 5067 | * Adjust inode # blocks in the file. |
1da177e4 | 5068 | */ |
9e5987a7 DC |
5069 | if (nblks) |
5070 | ip->i_d.di_nblocks -= nblks; | |
1da177e4 | 5071 | /* |
9e5987a7 | 5072 | * Adjust quota data. |
1da177e4 | 5073 | */ |
9e5987a7 DC |
5074 | if (qfield) |
5075 | xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks); | |
5076 | ||
5077 | /* | |
5078 | * Account for change in delayed indirect blocks. | |
5079 | * Nothing to do for disk quota accounting here. | |
5080 | */ | |
5081 | ASSERT(da_old >= da_new); | |
0d485ada DC |
5082 | if (da_old > da_new) |
5083 | xfs_mod_fdblocks(mp, (int64_t)(da_old - da_new), false); | |
9e5987a7 DC |
5084 | done: |
5085 | *logflagsp = flags; | |
1da177e4 LT |
5086 | return error; |
5087 | } | |
5088 | ||
3bacbcd8 | 5089 | /* |
9e5987a7 DC |
5090 | * Unmap (remove) blocks from a file. |
5091 | * If nexts is nonzero then the number of extents to remove is limited to | |
5092 | * that value. If not all extents in the block range can be removed then | |
5093 | * *done is set. | |
3bacbcd8 | 5094 | */ |
9e5987a7 DC |
5095 | int /* error */ |
5096 | xfs_bunmapi( | |
5097 | xfs_trans_t *tp, /* transaction pointer */ | |
5098 | struct xfs_inode *ip, /* incore inode */ | |
5099 | xfs_fileoff_t bno, /* starting offset to unmap */ | |
5100 | xfs_filblks_t len, /* length to unmap in file */ | |
5101 | int flags, /* misc flags */ | |
5102 | xfs_extnum_t nexts, /* number of extents max */ | |
5103 | xfs_fsblock_t *firstblock, /* first allocated block | |
5104 | controls a.g. for allocs */ | |
2c3234d1 | 5105 | struct xfs_defer_ops *dfops, /* i/o: list extents to free */ |
9e5987a7 | 5106 | int *done) /* set if not done yet */ |
3bacbcd8 | 5107 | { |
9e5987a7 DC |
5108 | xfs_btree_cur_t *cur; /* bmap btree cursor */ |
5109 | xfs_bmbt_irec_t del; /* extent being deleted */ | |
5110 | int eof; /* is deleting at eof */ | |
5111 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
5112 | int error; /* error return value */ | |
5113 | xfs_extnum_t extno; /* extent number in list */ | |
5114 | xfs_bmbt_irec_t got; /* current extent record */ | |
5af317c9 | 5115 | xfs_ifork_t *ifp; /* inode fork pointer */ |
9e5987a7 DC |
5116 | int isrt; /* freeing in rt area */ |
5117 | xfs_extnum_t lastx; /* last extent index used */ | |
5118 | int logflags; /* transaction logging flags */ | |
5119 | xfs_extlen_t mod; /* rt extent offset */ | |
5120 | xfs_mount_t *mp; /* mount structure */ | |
5121 | xfs_extnum_t nextents; /* number of file extents */ | |
5122 | xfs_bmbt_irec_t prev; /* previous extent record */ | |
5123 | xfs_fileoff_t start; /* first file offset deleted */ | |
5124 | int tmp_logflags; /* partial logging flags */ | |
5125 | int wasdel; /* was a delayed alloc extent */ | |
5126 | int whichfork; /* data or attribute fork */ | |
5127 | xfs_fsblock_t sum; | |
1da177e4 | 5128 | |
9e5987a7 | 5129 | trace_xfs_bunmap(ip, bno, len, flags, _RET_IP_); |
1da177e4 | 5130 | |
9e5987a7 DC |
5131 | whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
5132 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
5133 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5134 | if (unlikely( | |
5135 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5136 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { | |
5137 | XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW, | |
5138 | ip->i_mount); | |
2451337d | 5139 | return -EFSCORRUPTED; |
1da177e4 | 5140 | } |
9e5987a7 DC |
5141 | mp = ip->i_mount; |
5142 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 5143 | return -EIO; |
1da177e4 | 5144 | |
eef334e5 | 5145 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
9e5987a7 DC |
5146 | ASSERT(len > 0); |
5147 | ASSERT(nexts >= 0); | |
1da177e4 | 5148 | |
9e5987a7 DC |
5149 | if (!(ifp->if_flags & XFS_IFEXTENTS) && |
5150 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
5151 | return error; | |
5152 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
5153 | if (nextents == 0) { | |
5154 | *done = 1; | |
5155 | return 0; | |
5156 | } | |
ff6d6af2 | 5157 | XFS_STATS_INC(mp, xs_blk_unmap); |
9e5987a7 DC |
5158 | isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); |
5159 | start = bno; | |
5160 | bno = start + len - 1; | |
5161 | ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
5162 | &prev); | |
1da177e4 | 5163 | |
9e5987a7 DC |
5164 | /* |
5165 | * Check to see if the given block number is past the end of the | |
5166 | * file, back up to the last block if so... | |
5167 | */ | |
5168 | if (eof) { | |
5169 | ep = xfs_iext_get_ext(ifp, --lastx); | |
5170 | xfs_bmbt_get_all(ep, &got); | |
5171 | bno = got.br_startoff + got.br_blockcount - 1; | |
5172 | } | |
5173 | logflags = 0; | |
5174 | if (ifp->if_flags & XFS_IFBROOT) { | |
5175 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
5176 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
5177 | cur->bc_private.b.firstblock = *firstblock; | |
2c3234d1 | 5178 | cur->bc_private.b.dfops = dfops; |
9e5987a7 DC |
5179 | cur->bc_private.b.flags = 0; |
5180 | } else | |
5181 | cur = NULL; | |
5182 | ||
5183 | if (isrt) { | |
5184 | /* | |
5185 | * Synchronize by locking the bitmap inode. | |
5186 | */ | |
f4a0660d | 5187 | xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL|XFS_ILOCK_RTBITMAP); |
9e5987a7 | 5188 | xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); |
f4a0660d DW |
5189 | xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL|XFS_ILOCK_RTSUM); |
5190 | xfs_trans_ijoin(tp, mp->m_rsumip, XFS_ILOCK_EXCL); | |
9e5987a7 | 5191 | } |
58e20770 | 5192 | |
9e5987a7 DC |
5193 | extno = 0; |
5194 | while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 && | |
5195 | (nexts == 0 || extno < nexts)) { | |
5196 | /* | |
5197 | * Is the found extent after a hole in which bno lives? | |
5198 | * Just back up to the previous extent, if so. | |
5199 | */ | |
5200 | if (got.br_startoff > bno) { | |
5201 | if (--lastx < 0) | |
5202 | break; | |
5203 | ep = xfs_iext_get_ext(ifp, lastx); | |
5204 | xfs_bmbt_get_all(ep, &got); | |
5205 | } | |
5206 | /* | |
5207 | * Is the last block of this extent before the range | |
5208 | * we're supposed to delete? If so, we're done. | |
5209 | */ | |
5210 | bno = XFS_FILEOFF_MIN(bno, | |
5211 | got.br_startoff + got.br_blockcount - 1); | |
5212 | if (bno < start) | |
5213 | break; | |
5214 | /* | |
5215 | * Then deal with the (possibly delayed) allocated space | |
5216 | * we found. | |
5217 | */ | |
5218 | ASSERT(ep != NULL); | |
5219 | del = got; | |
5220 | wasdel = isnullstartblock(del.br_startblock); | |
5221 | if (got.br_startoff < start) { | |
5222 | del.br_startoff = start; | |
5223 | del.br_blockcount -= start - got.br_startoff; | |
5224 | if (!wasdel) | |
5225 | del.br_startblock += start - got.br_startoff; | |
5226 | } | |
5227 | if (del.br_startoff + del.br_blockcount > bno + 1) | |
5228 | del.br_blockcount = bno + 1 - del.br_startoff; | |
5229 | sum = del.br_startblock + del.br_blockcount; | |
5230 | if (isrt && | |
5231 | (mod = do_mod(sum, mp->m_sb.sb_rextsize))) { | |
58e20770 | 5232 | /* |
9e5987a7 DC |
5233 | * Realtime extent not lined up at the end. |
5234 | * The extent could have been split into written | |
5235 | * and unwritten pieces, or we could just be | |
5236 | * unmapping part of it. But we can't really | |
5237 | * get rid of part of a realtime extent. | |
58e20770 | 5238 | */ |
9e5987a7 DC |
5239 | if (del.br_state == XFS_EXT_UNWRITTEN || |
5240 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { | |
5241 | /* | |
5242 | * This piece is unwritten, or we're not | |
5243 | * using unwritten extents. Skip over it. | |
5244 | */ | |
5245 | ASSERT(bno >= mod); | |
5246 | bno -= mod > del.br_blockcount ? | |
5247 | del.br_blockcount : mod; | |
5248 | if (bno < got.br_startoff) { | |
5249 | if (--lastx >= 0) | |
5250 | xfs_bmbt_get_all(xfs_iext_get_ext( | |
5251 | ifp, lastx), &got); | |
5252 | } | |
5253 | continue; | |
1da177e4 | 5254 | } |
9af25465 | 5255 | /* |
9e5987a7 DC |
5256 | * It's written, turn it unwritten. |
5257 | * This is better than zeroing it. | |
9af25465 | 5258 | */ |
9e5987a7 | 5259 | ASSERT(del.br_state == XFS_EXT_NORM); |
a7e5d03b | 5260 | ASSERT(tp->t_blk_res > 0); |
9e5987a7 DC |
5261 | /* |
5262 | * If this spans a realtime extent boundary, | |
5263 | * chop it back to the start of the one we end at. | |
5264 | */ | |
5265 | if (del.br_blockcount > mod) { | |
5266 | del.br_startoff += del.br_blockcount - mod; | |
5267 | del.br_startblock += del.br_blockcount - mod; | |
5268 | del.br_blockcount = mod; | |
5269 | } | |
5270 | del.br_state = XFS_EXT_UNWRITTEN; | |
5271 | error = xfs_bmap_add_extent_unwritten_real(tp, ip, | |
2c3234d1 | 5272 | &lastx, &cur, &del, firstblock, dfops, |
9e5987a7 DC |
5273 | &logflags); |
5274 | if (error) | |
5275 | goto error0; | |
5276 | goto nodelete; | |
5277 | } | |
5278 | if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) { | |
5279 | /* | |
5280 | * Realtime extent is lined up at the end but not | |
5281 | * at the front. We'll get rid of full extents if | |
5282 | * we can. | |
5283 | */ | |
5284 | mod = mp->m_sb.sb_rextsize - mod; | |
5285 | if (del.br_blockcount > mod) { | |
5286 | del.br_blockcount -= mod; | |
5287 | del.br_startoff += mod; | |
5288 | del.br_startblock += mod; | |
5289 | } else if ((del.br_startoff == start && | |
5290 | (del.br_state == XFS_EXT_UNWRITTEN || | |
a7e5d03b | 5291 | tp->t_blk_res == 0)) || |
9e5987a7 DC |
5292 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
5293 | /* | |
5294 | * Can't make it unwritten. There isn't | |
5295 | * a full extent here so just skip it. | |
5296 | */ | |
5297 | ASSERT(bno >= del.br_blockcount); | |
5298 | bno -= del.br_blockcount; | |
5299 | if (got.br_startoff > bno) { | |
5300 | if (--lastx >= 0) { | |
5301 | ep = xfs_iext_get_ext(ifp, | |
5302 | lastx); | |
5303 | xfs_bmbt_get_all(ep, &got); | |
5304 | } | |
5305 | } | |
9af25465 | 5306 | continue; |
9e5987a7 DC |
5307 | } else if (del.br_state == XFS_EXT_UNWRITTEN) { |
5308 | /* | |
5309 | * This one is already unwritten. | |
5310 | * It must have a written left neighbor. | |
5311 | * Unwrite the killed part of that one and | |
5312 | * try again. | |
5313 | */ | |
5314 | ASSERT(lastx > 0); | |
5315 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, | |
5316 | lastx - 1), &prev); | |
5317 | ASSERT(prev.br_state == XFS_EXT_NORM); | |
5318 | ASSERT(!isnullstartblock(prev.br_startblock)); | |
5319 | ASSERT(del.br_startblock == | |
5320 | prev.br_startblock + prev.br_blockcount); | |
5321 | if (prev.br_startoff < start) { | |
5322 | mod = start - prev.br_startoff; | |
5323 | prev.br_blockcount -= mod; | |
5324 | prev.br_startblock += mod; | |
5325 | prev.br_startoff = start; | |
5326 | } | |
5327 | prev.br_state = XFS_EXT_UNWRITTEN; | |
5328 | lastx--; | |
5329 | error = xfs_bmap_add_extent_unwritten_real(tp, | |
5330 | ip, &lastx, &cur, &prev, | |
2c3234d1 | 5331 | firstblock, dfops, &logflags); |
9e5987a7 DC |
5332 | if (error) |
5333 | goto error0; | |
5334 | goto nodelete; | |
5335 | } else { | |
5336 | ASSERT(del.br_state == XFS_EXT_NORM); | |
5337 | del.br_state = XFS_EXT_UNWRITTEN; | |
5338 | error = xfs_bmap_add_extent_unwritten_real(tp, | |
5339 | ip, &lastx, &cur, &del, | |
2c3234d1 | 5340 | firstblock, dfops, &logflags); |
9e5987a7 DC |
5341 | if (error) |
5342 | goto error0; | |
5343 | goto nodelete; | |
9af25465 | 5344 | } |
1da177e4 | 5345 | } |
1da177e4 | 5346 | |
9e5987a7 DC |
5347 | /* |
5348 | * If it's the case where the directory code is running | |
5349 | * with no block reservation, and the deleted block is in | |
5350 | * the middle of its extent, and the resulting insert | |
5351 | * of an extent would cause transformation to btree format, | |
5352 | * then reject it. The calling code will then swap | |
5353 | * blocks around instead. | |
5354 | * We have to do this now, rather than waiting for the | |
5355 | * conversion to btree format, since the transaction | |
5356 | * will be dirty. | |
5357 | */ | |
a7e5d03b | 5358 | if (!wasdel && tp->t_blk_res == 0 && |
9e5987a7 DC |
5359 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && |
5360 | XFS_IFORK_NEXTENTS(ip, whichfork) >= /* Note the >= */ | |
5361 | XFS_IFORK_MAXEXT(ip, whichfork) && | |
5362 | del.br_startoff > got.br_startoff && | |
5363 | del.br_startoff + del.br_blockcount < | |
5364 | got.br_startoff + got.br_blockcount) { | |
2451337d | 5365 | error = -ENOSPC; |
9e5987a7 | 5366 | goto error0; |
1da177e4 | 5367 | } |
b2706a05 BF |
5368 | |
5369 | /* | |
5370 | * Unreserve quota and update realtime free space, if | |
5371 | * appropriate. If delayed allocation, update the inode delalloc | |
5372 | * counter now and wait to update the sb counters as | |
5373 | * xfs_bmap_del_extent() might need to borrow some blocks. | |
5374 | */ | |
5375 | if (wasdel) { | |
5376 | ASSERT(startblockval(del.br_startblock) > 0); | |
5377 | if (isrt) { | |
5378 | xfs_filblks_t rtexts; | |
5379 | ||
5380 | rtexts = XFS_FSB_TO_B(mp, del.br_blockcount); | |
5381 | do_div(rtexts, mp->m_sb.sb_rextsize); | |
5382 | xfs_mod_frextents(mp, (int64_t)rtexts); | |
5383 | (void)xfs_trans_reserve_quota_nblks(NULL, | |
5384 | ip, -((long)del.br_blockcount), 0, | |
5385 | XFS_QMOPT_RES_RTBLKS); | |
5386 | } else { | |
5387 | (void)xfs_trans_reserve_quota_nblks(NULL, | |
5388 | ip, -((long)del.br_blockcount), 0, | |
5389 | XFS_QMOPT_RES_REGBLKS); | |
5390 | } | |
5391 | ip->i_delayed_blks -= del.br_blockcount; | |
5392 | if (cur) | |
5393 | cur->bc_private.b.flags |= | |
5394 | XFS_BTCUR_BPRV_WASDEL; | |
5395 | } else if (cur) | |
5396 | cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL; | |
5397 | ||
2c3234d1 | 5398 | error = xfs_bmap_del_extent(ip, tp, &lastx, dfops, cur, &del, |
9e5987a7 DC |
5399 | &tmp_logflags, whichfork); |
5400 | logflags |= tmp_logflags; | |
5401 | if (error) | |
5402 | goto error0; | |
b2706a05 BF |
5403 | |
5404 | if (!isrt && wasdel) | |
5405 | xfs_mod_fdblocks(mp, (int64_t)del.br_blockcount, false); | |
5406 | ||
9e5987a7 DC |
5407 | bno = del.br_startoff - 1; |
5408 | nodelete: | |
1da177e4 | 5409 | /* |
9e5987a7 | 5410 | * If not done go on to the next (previous) record. |
1da177e4 | 5411 | */ |
9e5987a7 DC |
5412 | if (bno != (xfs_fileoff_t)-1 && bno >= start) { |
5413 | if (lastx >= 0) { | |
5414 | ep = xfs_iext_get_ext(ifp, lastx); | |
5415 | if (xfs_bmbt_get_startoff(ep) > bno) { | |
5416 | if (--lastx >= 0) | |
5417 | ep = xfs_iext_get_ext(ifp, | |
5418 | lastx); | |
5419 | } | |
5420 | xfs_bmbt_get_all(ep, &got); | |
1da177e4 | 5421 | } |
9e5987a7 | 5422 | extno++; |
1da177e4 LT |
5423 | } |
5424 | } | |
9e5987a7 | 5425 | *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0; |
576039cf | 5426 | |
1da177e4 | 5427 | /* |
9e5987a7 | 5428 | * Convert to a btree if necessary. |
1da177e4 | 5429 | */ |
9e5987a7 DC |
5430 | if (xfs_bmap_needs_btree(ip, whichfork)) { |
5431 | ASSERT(cur == NULL); | |
2c3234d1 | 5432 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, |
9e5987a7 DC |
5433 | &cur, 0, &tmp_logflags, whichfork); |
5434 | logflags |= tmp_logflags; | |
5435 | if (error) | |
5436 | goto error0; | |
1da177e4 | 5437 | } |
1da177e4 | 5438 | /* |
9e5987a7 | 5439 | * transform from btree to extents, give it cur |
1da177e4 | 5440 | */ |
9e5987a7 DC |
5441 | else if (xfs_bmap_wants_extents(ip, whichfork)) { |
5442 | ASSERT(cur != NULL); | |
5443 | error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags, | |
5444 | whichfork); | |
5445 | logflags |= tmp_logflags; | |
5446 | if (error) | |
5447 | goto error0; | |
5448 | } | |
1da177e4 | 5449 | /* |
9e5987a7 | 5450 | * transform from extents to local? |
1da177e4 | 5451 | */ |
9e5987a7 DC |
5452 | error = 0; |
5453 | error0: | |
5454 | /* | |
5455 | * Log everything. Do this after conversion, there's no point in | |
5456 | * logging the extent records if we've converted to btree format. | |
5457 | */ | |
5458 | if ((logflags & xfs_ilog_fext(whichfork)) && | |
5459 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
5460 | logflags &= ~xfs_ilog_fext(whichfork); | |
5461 | else if ((logflags & xfs_ilog_fbroot(whichfork)) && | |
5462 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) | |
5463 | logflags &= ~xfs_ilog_fbroot(whichfork); | |
5464 | /* | |
5465 | * Log inode even in the error case, if the transaction | |
5466 | * is dirty we'll need to shut down the filesystem. | |
5467 | */ | |
5468 | if (logflags) | |
5469 | xfs_trans_log_inode(tp, ip, logflags); | |
5470 | if (cur) { | |
5471 | if (!error) { | |
5472 | *firstblock = cur->bc_private.b.firstblock; | |
5473 | cur->bc_private.b.allocated = 0; | |
5474 | } | |
5475 | xfs_btree_del_cursor(cur, | |
5476 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
5477 | } | |
5478 | return error; | |
5479 | } | |
e1d8fb88 | 5480 | |
ddb19e31 BF |
5481 | /* |
5482 | * Determine whether an extent shift can be accomplished by a merge with the | |
5483 | * extent that precedes the target hole of the shift. | |
5484 | */ | |
5485 | STATIC bool | |
5486 | xfs_bmse_can_merge( | |
5487 | struct xfs_bmbt_irec *left, /* preceding extent */ | |
5488 | struct xfs_bmbt_irec *got, /* current extent to shift */ | |
5489 | xfs_fileoff_t shift) /* shift fsb */ | |
5490 | { | |
5491 | xfs_fileoff_t startoff; | |
5492 | ||
5493 | startoff = got->br_startoff - shift; | |
5494 | ||
5495 | /* | |
5496 | * The extent, once shifted, must be adjacent in-file and on-disk with | |
5497 | * the preceding extent. | |
5498 | */ | |
5499 | if ((left->br_startoff + left->br_blockcount != startoff) || | |
5500 | (left->br_startblock + left->br_blockcount != got->br_startblock) || | |
5501 | (left->br_state != got->br_state) || | |
5502 | (left->br_blockcount + got->br_blockcount > MAXEXTLEN)) | |
5503 | return false; | |
5504 | ||
5505 | return true; | |
5506 | } | |
5507 | ||
5508 | /* | |
5509 | * A bmap extent shift adjusts the file offset of an extent to fill a preceding | |
5510 | * hole in the file. If an extent shift would result in the extent being fully | |
5511 | * adjacent to the extent that currently precedes the hole, we can merge with | |
5512 | * the preceding extent rather than do the shift. | |
5513 | * | |
5514 | * This function assumes the caller has verified a shift-by-merge is possible | |
5515 | * with the provided extents via xfs_bmse_can_merge(). | |
5516 | */ | |
5517 | STATIC int | |
5518 | xfs_bmse_merge( | |
5519 | struct xfs_inode *ip, | |
5520 | int whichfork, | |
5521 | xfs_fileoff_t shift, /* shift fsb */ | |
5522 | int current_ext, /* idx of gotp */ | |
5523 | struct xfs_bmbt_rec_host *gotp, /* extent to shift */ | |
5524 | struct xfs_bmbt_rec_host *leftp, /* preceding extent */ | |
5525 | struct xfs_btree_cur *cur, | |
5526 | int *logflags) /* output */ | |
5527 | { | |
ddb19e31 BF |
5528 | struct xfs_bmbt_irec got; |
5529 | struct xfs_bmbt_irec left; | |
5530 | xfs_filblks_t blockcount; | |
5531 | int error, i; | |
5fb5aeee | 5532 | struct xfs_mount *mp = ip->i_mount; |
ddb19e31 | 5533 | |
ddb19e31 BF |
5534 | xfs_bmbt_get_all(gotp, &got); |
5535 | xfs_bmbt_get_all(leftp, &left); | |
5536 | blockcount = left.br_blockcount + got.br_blockcount; | |
5537 | ||
5538 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); | |
5539 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
5540 | ASSERT(xfs_bmse_can_merge(&left, &got, shift)); | |
5541 | ||
5542 | /* | |
5543 | * Merge the in-core extents. Note that the host record pointers and | |
5544 | * current_ext index are invalid once the extent has been removed via | |
5545 | * xfs_iext_remove(). | |
5546 | */ | |
5547 | xfs_bmbt_set_blockcount(leftp, blockcount); | |
5548 | xfs_iext_remove(ip, current_ext, 1, 0); | |
5549 | ||
5550 | /* | |
5551 | * Update the on-disk extent count, the btree if necessary and log the | |
5552 | * inode. | |
5553 | */ | |
5554 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
5555 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
5556 | *logflags |= XFS_ILOG_CORE; | |
5557 | if (!cur) { | |
5558 | *logflags |= XFS_ILOG_DEXT; | |
5559 | return 0; | |
5560 | } | |
5561 | ||
5562 | /* lookup and remove the extent to merge */ | |
5563 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock, | |
5564 | got.br_blockcount, &i); | |
5565 | if (error) | |
4db431f5 | 5566 | return error; |
5fb5aeee | 5567 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
ddb19e31 BF |
5568 | |
5569 | error = xfs_btree_delete(cur, &i); | |
5570 | if (error) | |
4db431f5 | 5571 | return error; |
5fb5aeee | 5572 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
ddb19e31 BF |
5573 | |
5574 | /* lookup and update size of the previous extent */ | |
5575 | error = xfs_bmbt_lookup_eq(cur, left.br_startoff, left.br_startblock, | |
5576 | left.br_blockcount, &i); | |
5577 | if (error) | |
4db431f5 | 5578 | return error; |
5fb5aeee | 5579 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
ddb19e31 BF |
5580 | |
5581 | left.br_blockcount = blockcount; | |
5582 | ||
4db431f5 DC |
5583 | return xfs_bmbt_update(cur, left.br_startoff, left.br_startblock, |
5584 | left.br_blockcount, left.br_state); | |
ddb19e31 BF |
5585 | } |
5586 | ||
a979bdfe BF |
5587 | /* |
5588 | * Shift a single extent. | |
5589 | */ | |
5590 | STATIC int | |
5591 | xfs_bmse_shift_one( | |
5592 | struct xfs_inode *ip, | |
5593 | int whichfork, | |
5594 | xfs_fileoff_t offset_shift_fsb, | |
5595 | int *current_ext, | |
5596 | struct xfs_bmbt_rec_host *gotp, | |
5597 | struct xfs_btree_cur *cur, | |
a904b1ca | 5598 | int *logflags, |
9c194644 DW |
5599 | enum shift_direction direction, |
5600 | struct xfs_defer_ops *dfops) | |
a979bdfe BF |
5601 | { |
5602 | struct xfs_ifork *ifp; | |
5fb5aeee | 5603 | struct xfs_mount *mp; |
a979bdfe | 5604 | xfs_fileoff_t startoff; |
a904b1ca | 5605 | struct xfs_bmbt_rec_host *adj_irecp; |
a979bdfe | 5606 | struct xfs_bmbt_irec got; |
a904b1ca | 5607 | struct xfs_bmbt_irec adj_irec; |
a979bdfe BF |
5608 | int error; |
5609 | int i; | |
a904b1ca | 5610 | int total_extents; |
a979bdfe | 5611 | |
5fb5aeee | 5612 | mp = ip->i_mount; |
a979bdfe | 5613 | ifp = XFS_IFORK_PTR(ip, whichfork); |
a904b1ca | 5614 | total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); |
a979bdfe BF |
5615 | |
5616 | xfs_bmbt_get_all(gotp, &got); | |
a979bdfe | 5617 | |
f71721d0 | 5618 | /* delalloc extents should be prevented by caller */ |
5fb5aeee | 5619 | XFS_WANT_CORRUPTED_RETURN(mp, !isnullstartblock(got.br_startblock)); |
f71721d0 | 5620 | |
a904b1ca NJ |
5621 | if (direction == SHIFT_LEFT) { |
5622 | startoff = got.br_startoff - offset_shift_fsb; | |
5623 | ||
5624 | /* | |
5625 | * Check for merge if we've got an extent to the left, | |
5626 | * otherwise make sure there's enough room at the start | |
5627 | * of the file for the shift. | |
5628 | */ | |
5629 | if (!*current_ext) { | |
5630 | if (got.br_startoff < offset_shift_fsb) | |
5631 | return -EINVAL; | |
5632 | goto update_current_ext; | |
5633 | } | |
5634 | /* | |
5635 | * grab the left extent and check for a large | |
5636 | * enough hole. | |
5637 | */ | |
5638 | adj_irecp = xfs_iext_get_ext(ifp, *current_ext - 1); | |
5639 | xfs_bmbt_get_all(adj_irecp, &adj_irec); | |
a979bdfe | 5640 | |
a904b1ca NJ |
5641 | if (startoff < |
5642 | adj_irec.br_startoff + adj_irec.br_blockcount) | |
b11bd671 | 5643 | return -EINVAL; |
a979bdfe | 5644 | |
b11bd671 | 5645 | /* check whether to merge the extent or shift it down */ |
a904b1ca NJ |
5646 | if (xfs_bmse_can_merge(&adj_irec, &got, |
5647 | offset_shift_fsb)) { | |
9c194644 DW |
5648 | error = xfs_bmse_merge(ip, whichfork, offset_shift_fsb, |
5649 | *current_ext, gotp, adj_irecp, | |
5650 | cur, logflags); | |
5651 | if (error) | |
5652 | return error; | |
5653 | adj_irec = got; | |
5654 | goto update_rmap; | |
b11bd671 | 5655 | } |
a904b1ca NJ |
5656 | } else { |
5657 | startoff = got.br_startoff + offset_shift_fsb; | |
5658 | /* nothing to move if this is the last extent */ | |
5659 | if (*current_ext >= (total_extents - 1)) | |
5660 | goto update_current_ext; | |
5661 | /* | |
5662 | * If this is not the last extent in the file, make sure there | |
5663 | * is enough room between current extent and next extent for | |
5664 | * accommodating the shift. | |
5665 | */ | |
5666 | adj_irecp = xfs_iext_get_ext(ifp, *current_ext + 1); | |
5667 | xfs_bmbt_get_all(adj_irecp, &adj_irec); | |
5668 | if (startoff + got.br_blockcount > adj_irec.br_startoff) | |
5669 | return -EINVAL; | |
5670 | /* | |
5671 | * Unlike a left shift (which involves a hole punch), | |
5672 | * a right shift does not modify extent neighbors | |
5673 | * in any way. We should never find mergeable extents | |
5674 | * in this scenario. Check anyways and warn if we | |
5675 | * encounter two extents that could be one. | |
5676 | */ | |
5677 | if (xfs_bmse_can_merge(&got, &adj_irec, offset_shift_fsb)) | |
5678 | WARN_ON_ONCE(1); | |
5679 | } | |
a979bdfe BF |
5680 | /* |
5681 | * Increment the extent index for the next iteration, update the start | |
5682 | * offset of the in-core extent and update the btree if applicable. | |
5683 | */ | |
a904b1ca NJ |
5684 | update_current_ext: |
5685 | if (direction == SHIFT_LEFT) | |
5686 | (*current_ext)++; | |
5687 | else | |
5688 | (*current_ext)--; | |
a979bdfe BF |
5689 | xfs_bmbt_set_startoff(gotp, startoff); |
5690 | *logflags |= XFS_ILOG_CORE; | |
9c194644 | 5691 | adj_irec = got; |
a979bdfe BF |
5692 | if (!cur) { |
5693 | *logflags |= XFS_ILOG_DEXT; | |
9c194644 | 5694 | goto update_rmap; |
a979bdfe BF |
5695 | } |
5696 | ||
5697 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock, | |
5698 | got.br_blockcount, &i); | |
5699 | if (error) | |
5700 | return error; | |
5fb5aeee | 5701 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
a979bdfe BF |
5702 | |
5703 | got.br_startoff = startoff; | |
9c194644 DW |
5704 | error = xfs_bmbt_update(cur, got.br_startoff, got.br_startblock, |
5705 | got.br_blockcount, got.br_state); | |
5706 | if (error) | |
5707 | return error; | |
5708 | ||
5709 | update_rmap: | |
5710 | /* update reverse mapping */ | |
5711 | error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, &adj_irec); | |
5712 | if (error) | |
5713 | return error; | |
5714 | adj_irec.br_startoff = startoff; | |
5715 | return xfs_rmap_map_extent(mp, dfops, ip, whichfork, &adj_irec); | |
a979bdfe BF |
5716 | } |
5717 | ||
e1d8fb88 | 5718 | /* |
a904b1ca | 5719 | * Shift extent records to the left/right to cover/create a hole. |
e1d8fb88 | 5720 | * |
2c845f5a | 5721 | * The maximum number of extents to be shifted in a single operation is |
a904b1ca | 5722 | * @num_exts. @stop_fsb specifies the file offset at which to stop shift and the |
2c845f5a BF |
5723 | * file offset where we've left off is returned in @next_fsb. @offset_shift_fsb |
5724 | * is the length by which each extent is shifted. If there is no hole to shift | |
5725 | * the extents into, this will be considered invalid operation and we abort | |
5726 | * immediately. | |
e1d8fb88 NJ |
5727 | */ |
5728 | int | |
5729 | xfs_bmap_shift_extents( | |
5730 | struct xfs_trans *tp, | |
5731 | struct xfs_inode *ip, | |
a904b1ca | 5732 | xfs_fileoff_t *next_fsb, |
e1d8fb88 | 5733 | xfs_fileoff_t offset_shift_fsb, |
2c845f5a | 5734 | int *done, |
a904b1ca | 5735 | xfs_fileoff_t stop_fsb, |
e1d8fb88 | 5736 | xfs_fsblock_t *firstblock, |
2c3234d1 | 5737 | struct xfs_defer_ops *dfops, |
a904b1ca | 5738 | enum shift_direction direction, |
e1d8fb88 NJ |
5739 | int num_exts) |
5740 | { | |
ca446d88 | 5741 | struct xfs_btree_cur *cur = NULL; |
e1d8fb88 NJ |
5742 | struct xfs_bmbt_rec_host *gotp; |
5743 | struct xfs_bmbt_irec got; | |
e1d8fb88 NJ |
5744 | struct xfs_mount *mp = ip->i_mount; |
5745 | struct xfs_ifork *ifp; | |
5746 | xfs_extnum_t nexts = 0; | |
2c845f5a | 5747 | xfs_extnum_t current_ext; |
a904b1ca NJ |
5748 | xfs_extnum_t total_extents; |
5749 | xfs_extnum_t stop_extent; | |
e1d8fb88 | 5750 | int error = 0; |
e1d8fb88 | 5751 | int whichfork = XFS_DATA_FORK; |
ca446d88 | 5752 | int logflags = 0; |
e1d8fb88 NJ |
5753 | |
5754 | if (unlikely(XFS_TEST_ERROR( | |
5755 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5756 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
5757 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
5758 | XFS_ERROR_REPORT("xfs_bmap_shift_extents", | |
5759 | XFS_ERRLEVEL_LOW, mp); | |
2451337d | 5760 | return -EFSCORRUPTED; |
e1d8fb88 NJ |
5761 | } |
5762 | ||
5763 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 5764 | return -EIO; |
e1d8fb88 | 5765 | |
2c845f5a BF |
5766 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
5767 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
a904b1ca NJ |
5768 | ASSERT(direction == SHIFT_LEFT || direction == SHIFT_RIGHT); |
5769 | ASSERT(*next_fsb != NULLFSBLOCK || direction == SHIFT_RIGHT); | |
e1d8fb88 NJ |
5770 | |
5771 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
e1d8fb88 NJ |
5772 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { |
5773 | /* Read in all the extents */ | |
5774 | error = xfs_iread_extents(tp, ip, whichfork); | |
5775 | if (error) | |
5776 | return error; | |
5777 | } | |
5778 | ||
ddb19e31 BF |
5779 | if (ifp->if_flags & XFS_IFBROOT) { |
5780 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
5781 | cur->bc_private.b.firstblock = *firstblock; | |
2c3234d1 | 5782 | cur->bc_private.b.dfops = dfops; |
ddb19e31 BF |
5783 | cur->bc_private.b.flags = 0; |
5784 | } | |
5785 | ||
a904b1ca NJ |
5786 | /* |
5787 | * There may be delalloc extents in the data fork before the range we | |
5788 | * are collapsing out, so we cannot use the count of real extents here. | |
5789 | * Instead we have to calculate it from the incore fork. | |
5790 | */ | |
5791 | total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); | |
5792 | if (total_extents == 0) { | |
5793 | *done = 1; | |
5794 | goto del_cursor; | |
5795 | } | |
5796 | ||
5797 | /* | |
5798 | * In case of first right shift, we need to initialize next_fsb | |
5799 | */ | |
5800 | if (*next_fsb == NULLFSBLOCK) { | |
5801 | gotp = xfs_iext_get_ext(ifp, total_extents - 1); | |
5802 | xfs_bmbt_get_all(gotp, &got); | |
5803 | *next_fsb = got.br_startoff; | |
5804 | if (stop_fsb > *next_fsb) { | |
5805 | *done = 1; | |
5806 | goto del_cursor; | |
5807 | } | |
5808 | } | |
5809 | ||
5810 | /* Lookup the extent index at which we have to stop */ | |
5811 | if (direction == SHIFT_RIGHT) { | |
5812 | gotp = xfs_iext_bno_to_ext(ifp, stop_fsb, &stop_extent); | |
5813 | /* Make stop_extent exclusive of shift range */ | |
5814 | stop_extent--; | |
5815 | } else | |
5816 | stop_extent = total_extents; | |
5817 | ||
e1d8fb88 | 5818 | /* |
2c845f5a BF |
5819 | * Look up the extent index for the fsb where we start shifting. We can |
5820 | * henceforth iterate with current_ext as extent list changes are locked | |
5821 | * out via ilock. | |
5822 | * | |
5823 | * gotp can be null in 2 cases: 1) if there are no extents or 2) | |
a904b1ca | 5824 | * *next_fsb lies in a hole beyond which there are no extents. Either |
2c845f5a | 5825 | * way, we are done. |
e1d8fb88 | 5826 | */ |
a904b1ca | 5827 | gotp = xfs_iext_bno_to_ext(ifp, *next_fsb, ¤t_ext); |
2c845f5a BF |
5828 | if (!gotp) { |
5829 | *done = 1; | |
ddb19e31 | 5830 | goto del_cursor; |
e1d8fb88 | 5831 | } |
e1d8fb88 | 5832 | |
a904b1ca NJ |
5833 | /* some sanity checking before we finally start shifting extents */ |
5834 | if ((direction == SHIFT_LEFT && current_ext >= stop_extent) || | |
5835 | (direction == SHIFT_RIGHT && current_ext <= stop_extent)) { | |
5836 | error = -EIO; | |
5837 | goto del_cursor; | |
5838 | } | |
5839 | ||
5840 | while (nexts++ < num_exts) { | |
a979bdfe | 5841 | error = xfs_bmse_shift_one(ip, whichfork, offset_shift_fsb, |
a904b1ca | 5842 | ¤t_ext, gotp, cur, &logflags, |
9c194644 | 5843 | direction, dfops); |
a979bdfe BF |
5844 | if (error) |
5845 | goto del_cursor; | |
a904b1ca NJ |
5846 | /* |
5847 | * If there was an extent merge during the shift, the extent | |
5848 | * count can change. Update the total and grade the next record. | |
5849 | */ | |
5850 | if (direction == SHIFT_LEFT) { | |
5851 | total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); | |
5852 | stop_extent = total_extents; | |
5853 | } | |
e1d8fb88 | 5854 | |
a904b1ca NJ |
5855 | if (current_ext == stop_extent) { |
5856 | *done = 1; | |
5857 | *next_fsb = NULLFSBLOCK; | |
ddb19e31 | 5858 | break; |
a904b1ca | 5859 | } |
ddb19e31 | 5860 | gotp = xfs_iext_get_ext(ifp, current_ext); |
e1d8fb88 NJ |
5861 | } |
5862 | ||
a904b1ca | 5863 | if (!*done) { |
a979bdfe | 5864 | xfs_bmbt_get_all(gotp, &got); |
2c845f5a | 5865 | *next_fsb = got.br_startoff; |
a979bdfe | 5866 | } |
e1d8fb88 NJ |
5867 | |
5868 | del_cursor: | |
5869 | if (cur) | |
5870 | xfs_btree_del_cursor(cur, | |
5871 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
5872 | ||
ca446d88 BF |
5873 | if (logflags) |
5874 | xfs_trans_log_inode(tp, ip, logflags); | |
2c845f5a | 5875 | |
e1d8fb88 NJ |
5876 | return error; |
5877 | } | |
a904b1ca NJ |
5878 | |
5879 | /* | |
5880 | * Splits an extent into two extents at split_fsb block such that it is | |
5881 | * the first block of the current_ext. @current_ext is a target extent | |
5882 | * to be split. @split_fsb is a block where the extents is split. | |
5883 | * If split_fsb lies in a hole or the first block of extents, just return 0. | |
5884 | */ | |
5885 | STATIC int | |
5886 | xfs_bmap_split_extent_at( | |
5887 | struct xfs_trans *tp, | |
5888 | struct xfs_inode *ip, | |
5889 | xfs_fileoff_t split_fsb, | |
5890 | xfs_fsblock_t *firstfsb, | |
2c3234d1 | 5891 | struct xfs_defer_ops *dfops) |
a904b1ca NJ |
5892 | { |
5893 | int whichfork = XFS_DATA_FORK; | |
5894 | struct xfs_btree_cur *cur = NULL; | |
5895 | struct xfs_bmbt_rec_host *gotp; | |
5896 | struct xfs_bmbt_irec got; | |
5897 | struct xfs_bmbt_irec new; /* split extent */ | |
5898 | struct xfs_mount *mp = ip->i_mount; | |
5899 | struct xfs_ifork *ifp; | |
5900 | xfs_fsblock_t gotblkcnt; /* new block count for got */ | |
5901 | xfs_extnum_t current_ext; | |
5902 | int error = 0; | |
5903 | int logflags = 0; | |
5904 | int i = 0; | |
5905 | ||
5906 | if (unlikely(XFS_TEST_ERROR( | |
5907 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5908 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
5909 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
5910 | XFS_ERROR_REPORT("xfs_bmap_split_extent_at", | |
5911 | XFS_ERRLEVEL_LOW, mp); | |
5912 | return -EFSCORRUPTED; | |
5913 | } | |
5914 | ||
5915 | if (XFS_FORCED_SHUTDOWN(mp)) | |
5916 | return -EIO; | |
5917 | ||
5918 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5919 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
5920 | /* Read in all the extents */ | |
5921 | error = xfs_iread_extents(tp, ip, whichfork); | |
5922 | if (error) | |
5923 | return error; | |
5924 | } | |
5925 | ||
5926 | /* | |
5927 | * gotp can be null in 2 cases: 1) if there are no extents | |
5928 | * or 2) split_fsb lies in a hole beyond which there are | |
5929 | * no extents. Either way, we are done. | |
5930 | */ | |
5931 | gotp = xfs_iext_bno_to_ext(ifp, split_fsb, ¤t_ext); | |
5932 | if (!gotp) | |
5933 | return 0; | |
5934 | ||
5935 | xfs_bmbt_get_all(gotp, &got); | |
5936 | ||
5937 | /* | |
5938 | * Check split_fsb lies in a hole or the start boundary offset | |
5939 | * of the extent. | |
5940 | */ | |
5941 | if (got.br_startoff >= split_fsb) | |
5942 | return 0; | |
5943 | ||
5944 | gotblkcnt = split_fsb - got.br_startoff; | |
5945 | new.br_startoff = split_fsb; | |
5946 | new.br_startblock = got.br_startblock + gotblkcnt; | |
5947 | new.br_blockcount = got.br_blockcount - gotblkcnt; | |
5948 | new.br_state = got.br_state; | |
5949 | ||
5950 | if (ifp->if_flags & XFS_IFBROOT) { | |
5951 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
5952 | cur->bc_private.b.firstblock = *firstfsb; | |
2c3234d1 | 5953 | cur->bc_private.b.dfops = dfops; |
a904b1ca NJ |
5954 | cur->bc_private.b.flags = 0; |
5955 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
5956 | got.br_startblock, | |
5957 | got.br_blockcount, | |
5958 | &i); | |
5959 | if (error) | |
5960 | goto del_cursor; | |
5961 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); | |
5962 | } | |
5963 | ||
5964 | xfs_bmbt_set_blockcount(gotp, gotblkcnt); | |
5965 | got.br_blockcount = gotblkcnt; | |
5966 | ||
5967 | logflags = XFS_ILOG_CORE; | |
5968 | if (cur) { | |
5969 | error = xfs_bmbt_update(cur, got.br_startoff, | |
5970 | got.br_startblock, | |
5971 | got.br_blockcount, | |
5972 | got.br_state); | |
5973 | if (error) | |
5974 | goto del_cursor; | |
5975 | } else | |
5976 | logflags |= XFS_ILOG_DEXT; | |
5977 | ||
5978 | /* Add new extent */ | |
5979 | current_ext++; | |
5980 | xfs_iext_insert(ip, current_ext, 1, &new, 0); | |
5981 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
5982 | XFS_IFORK_NEXTENTS(ip, whichfork) + 1); | |
5983 | ||
5984 | if (cur) { | |
5985 | error = xfs_bmbt_lookup_eq(cur, new.br_startoff, | |
5986 | new.br_startblock, new.br_blockcount, | |
5987 | &i); | |
5988 | if (error) | |
5989 | goto del_cursor; | |
5990 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, del_cursor); | |
5991 | cur->bc_rec.b.br_state = new.br_state; | |
5992 | ||
5993 | error = xfs_btree_insert(cur, &i); | |
5994 | if (error) | |
5995 | goto del_cursor; | |
5996 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); | |
5997 | } | |
5998 | ||
5999 | /* | |
6000 | * Convert to a btree if necessary. | |
6001 | */ | |
6002 | if (xfs_bmap_needs_btree(ip, whichfork)) { | |
6003 | int tmp_logflags; /* partial log flag return val */ | |
6004 | ||
6005 | ASSERT(cur == NULL); | |
2c3234d1 | 6006 | error = xfs_bmap_extents_to_btree(tp, ip, firstfsb, dfops, |
a904b1ca NJ |
6007 | &cur, 0, &tmp_logflags, whichfork); |
6008 | logflags |= tmp_logflags; | |
6009 | } | |
6010 | ||
6011 | del_cursor: | |
6012 | if (cur) { | |
6013 | cur->bc_private.b.allocated = 0; | |
6014 | xfs_btree_del_cursor(cur, | |
6015 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
6016 | } | |
6017 | ||
6018 | if (logflags) | |
6019 | xfs_trans_log_inode(tp, ip, logflags); | |
6020 | return error; | |
6021 | } | |
6022 | ||
6023 | int | |
6024 | xfs_bmap_split_extent( | |
6025 | struct xfs_inode *ip, | |
6026 | xfs_fileoff_t split_fsb) | |
6027 | { | |
6028 | struct xfs_mount *mp = ip->i_mount; | |
6029 | struct xfs_trans *tp; | |
2c3234d1 | 6030 | struct xfs_defer_ops dfops; |
a904b1ca | 6031 | xfs_fsblock_t firstfsb; |
a904b1ca NJ |
6032 | int error; |
6033 | ||
253f4911 CH |
6034 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, |
6035 | XFS_DIOSTRAT_SPACE_RES(mp, 0), 0, 0, &tp); | |
6036 | if (error) | |
a904b1ca | 6037 | return error; |
a904b1ca NJ |
6038 | |
6039 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
6040 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
6041 | ||
2c3234d1 | 6042 | xfs_defer_init(&dfops, &firstfsb); |
a904b1ca NJ |
6043 | |
6044 | error = xfs_bmap_split_extent_at(tp, ip, split_fsb, | |
2c3234d1 | 6045 | &firstfsb, &dfops); |
a904b1ca NJ |
6046 | if (error) |
6047 | goto out; | |
6048 | ||
2c3234d1 | 6049 | error = xfs_defer_finish(&tp, &dfops, NULL); |
a904b1ca NJ |
6050 | if (error) |
6051 | goto out; | |
6052 | ||
70393313 | 6053 | return xfs_trans_commit(tp); |
a904b1ca NJ |
6054 | |
6055 | out: | |
2c3234d1 | 6056 | xfs_defer_cancel(&dfops); |
4906e215 | 6057 | xfs_trans_cancel(tp); |
a904b1ca NJ |
6058 | return error; |
6059 | } |