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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" |
3fd129b6 | 50 | #include "xfs_ag_resv.h" |
62aab20f | 51 | #include "xfs_refcount.h" |
fd26a880 | 52 | #include "xfs_rmap_btree.h" |
974ae922 | 53 | #include "xfs_icache.h" |
1da177e4 LT |
54 | |
55 | ||
1da177e4 LT |
56 | kmem_zone_t *xfs_bmap_free_item_zone; |
57 | ||
58 | /* | |
9e5987a7 | 59 | * Miscellaneous helper functions |
1da177e4 LT |
60 | */ |
61 | ||
1da177e4 | 62 | /* |
9e5987a7 DC |
63 | * Compute and fill in the value of the maximum depth of a bmap btree |
64 | * in this filesystem. Done once, during mount. | |
1da177e4 | 65 | */ |
9e5987a7 DC |
66 | void |
67 | xfs_bmap_compute_maxlevels( | |
68 | xfs_mount_t *mp, /* file system mount structure */ | |
69 | int whichfork) /* data or attr fork */ | |
70 | { | |
71 | int level; /* btree level */ | |
72 | uint maxblocks; /* max blocks at this level */ | |
73 | uint maxleafents; /* max leaf entries possible */ | |
74 | int maxrootrecs; /* max records in root block */ | |
75 | int minleafrecs; /* min records in leaf block */ | |
76 | int minnoderecs; /* min records in node block */ | |
77 | int sz; /* root block size */ | |
1da177e4 | 78 | |
9e5987a7 DC |
79 | /* |
80 | * The maximum number of extents in a file, hence the maximum | |
81 | * number of leaf entries, is controlled by the type of di_nextents | |
82 | * (a signed 32-bit number, xfs_extnum_t), or by di_anextents | |
83 | * (a signed 16-bit number, xfs_aextnum_t). | |
84 | * | |
85 | * Note that we can no longer assume that if we are in ATTR1 that | |
86 | * the fork offset of all the inodes will be | |
87 | * (xfs_default_attroffset(ip) >> 3) because we could have mounted | |
88 | * with ATTR2 and then mounted back with ATTR1, keeping the | |
89 | * di_forkoff's fixed but probably at various positions. Therefore, | |
90 | * for both ATTR1 and ATTR2 we have to assume the worst case scenario | |
91 | * of a minimum size available. | |
92 | */ | |
93 | if (whichfork == XFS_DATA_FORK) { | |
94 | maxleafents = MAXEXTNUM; | |
95 | sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS); | |
96 | } else { | |
97 | maxleafents = MAXAEXTNUM; | |
98 | sz = XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
99 | } | |
152d93b7 | 100 | maxrootrecs = xfs_bmdr_maxrecs(sz, 0); |
9e5987a7 DC |
101 | minleafrecs = mp->m_bmap_dmnr[0]; |
102 | minnoderecs = mp->m_bmap_dmnr[1]; | |
103 | maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; | |
104 | for (level = 1; maxblocks > 1; level++) { | |
105 | if (maxblocks <= maxrootrecs) | |
106 | maxblocks = 1; | |
107 | else | |
108 | maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; | |
109 | } | |
110 | mp->m_bm_maxlevels[whichfork] = level; | |
111 | } | |
91e11088 | 112 | |
fe033cc8 CH |
113 | STATIC int /* error */ |
114 | xfs_bmbt_lookup_eq( | |
115 | struct xfs_btree_cur *cur, | |
116 | xfs_fileoff_t off, | |
117 | xfs_fsblock_t bno, | |
118 | xfs_filblks_t len, | |
119 | int *stat) /* success/failure */ | |
120 | { | |
121 | cur->bc_rec.b.br_startoff = off; | |
122 | cur->bc_rec.b.br_startblock = bno; | |
123 | cur->bc_rec.b.br_blockcount = len; | |
124 | return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); | |
125 | } | |
126 | ||
127 | STATIC int /* error */ | |
128 | xfs_bmbt_lookup_ge( | |
129 | struct xfs_btree_cur *cur, | |
130 | xfs_fileoff_t off, | |
131 | xfs_fsblock_t bno, | |
132 | xfs_filblks_t len, | |
133 | int *stat) /* success/failure */ | |
134 | { | |
135 | cur->bc_rec.b.br_startoff = off; | |
136 | cur->bc_rec.b.br_startblock = bno; | |
137 | cur->bc_rec.b.br_blockcount = len; | |
138 | return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); | |
139 | } | |
140 | ||
278d0ca1 | 141 | /* |
8096b1eb CH |
142 | * Check if the inode needs to be converted to btree format. |
143 | */ | |
144 | static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) | |
145 | { | |
60b4984f DW |
146 | return whichfork != XFS_COW_FORK && |
147 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && | |
8096b1eb CH |
148 | XFS_IFORK_NEXTENTS(ip, whichfork) > |
149 | XFS_IFORK_MAXEXT(ip, whichfork); | |
150 | } | |
151 | ||
152 | /* | |
153 | * Check if the inode should be converted to extent format. | |
154 | */ | |
155 | static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork) | |
156 | { | |
60b4984f DW |
157 | return whichfork != XFS_COW_FORK && |
158 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && | |
8096b1eb CH |
159 | XFS_IFORK_NEXTENTS(ip, whichfork) <= |
160 | XFS_IFORK_MAXEXT(ip, whichfork); | |
161 | } | |
162 | ||
163 | /* | |
164 | * Update the record referred to by cur to the value given | |
278d0ca1 CH |
165 | * by [off, bno, len, state]. |
166 | * This either works (return 0) or gets an EFSCORRUPTED error. | |
167 | */ | |
168 | STATIC int | |
169 | xfs_bmbt_update( | |
170 | struct xfs_btree_cur *cur, | |
171 | xfs_fileoff_t off, | |
172 | xfs_fsblock_t bno, | |
173 | xfs_filblks_t len, | |
174 | xfs_exntst_t state) | |
175 | { | |
176 | union xfs_btree_rec rec; | |
177 | ||
178 | xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state); | |
179 | return xfs_btree_update(cur, &rec); | |
180 | } | |
fe033cc8 | 181 | |
1da177e4 | 182 | /* |
9e5987a7 DC |
183 | * Compute the worst-case number of indirect blocks that will be used |
184 | * for ip's delayed extent of length "len". | |
1da177e4 | 185 | */ |
9e5987a7 DC |
186 | STATIC xfs_filblks_t |
187 | xfs_bmap_worst_indlen( | |
188 | xfs_inode_t *ip, /* incore inode pointer */ | |
189 | xfs_filblks_t len) /* delayed extent length */ | |
1da177e4 | 190 | { |
9e5987a7 DC |
191 | int level; /* btree level number */ |
192 | int maxrecs; /* maximum record count at this level */ | |
193 | xfs_mount_t *mp; /* mount structure */ | |
194 | xfs_filblks_t rval; /* return value */ | |
fd26a880 | 195 | xfs_filblks_t orig_len; |
1da177e4 LT |
196 | |
197 | mp = ip->i_mount; | |
fd26a880 DW |
198 | |
199 | /* Calculate the worst-case size of the bmbt. */ | |
200 | orig_len = len; | |
9e5987a7 DC |
201 | maxrecs = mp->m_bmap_dmxr[0]; |
202 | for (level = 0, rval = 0; | |
203 | level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); | |
204 | level++) { | |
205 | len += maxrecs - 1; | |
206 | do_div(len, maxrecs); | |
207 | rval += len; | |
fd26a880 DW |
208 | if (len == 1) { |
209 | rval += XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - | |
9e5987a7 | 210 | level - 1; |
fd26a880 DW |
211 | break; |
212 | } | |
9e5987a7 DC |
213 | if (level == 0) |
214 | maxrecs = mp->m_bmap_dmxr[1]; | |
1da177e4 | 215 | } |
fd26a880 DW |
216 | |
217 | /* Calculate the worst-case size of the rmapbt. */ | |
218 | if (xfs_sb_version_hasrmapbt(&mp->m_sb)) | |
219 | rval += 1 + xfs_rmapbt_calc_size(mp, orig_len) + | |
220 | mp->m_rmap_maxlevels; | |
221 | ||
9e5987a7 | 222 | return rval; |
1da177e4 LT |
223 | } |
224 | ||
225 | /* | |
9e5987a7 | 226 | * Calculate the default attribute fork offset for newly created inodes. |
1da177e4 | 227 | */ |
9e5987a7 DC |
228 | uint |
229 | xfs_default_attroffset( | |
230 | struct xfs_inode *ip) | |
1da177e4 | 231 | { |
9e5987a7 DC |
232 | struct xfs_mount *mp = ip->i_mount; |
233 | uint offset; | |
1da177e4 | 234 | |
9e5987a7 | 235 | if (mp->m_sb.sb_inodesize == 256) { |
56cea2d0 | 236 | offset = XFS_LITINO(mp, ip->i_d.di_version) - |
9e5987a7 DC |
237 | XFS_BMDR_SPACE_CALC(MINABTPTRS); |
238 | } else { | |
239 | offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); | |
1da177e4 | 240 | } |
9e5987a7 | 241 | |
56cea2d0 | 242 | ASSERT(offset < XFS_LITINO(mp, ip->i_d.di_version)); |
9e5987a7 | 243 | return offset; |
1da177e4 LT |
244 | } |
245 | ||
246 | /* | |
9e5987a7 DC |
247 | * Helper routine to reset inode di_forkoff field when switching |
248 | * attribute fork from local to extent format - we reset it where | |
249 | * possible to make space available for inline data fork extents. | |
1e82379b DC |
250 | */ |
251 | STATIC void | |
9e5987a7 | 252 | xfs_bmap_forkoff_reset( |
9e5987a7 DC |
253 | xfs_inode_t *ip, |
254 | int whichfork) | |
1e82379b | 255 | { |
9e5987a7 DC |
256 | if (whichfork == XFS_ATTR_FORK && |
257 | ip->i_d.di_format != XFS_DINODE_FMT_DEV && | |
258 | ip->i_d.di_format != XFS_DINODE_FMT_UUID && | |
259 | ip->i_d.di_format != XFS_DINODE_FMT_BTREE) { | |
260 | uint dfl_forkoff = xfs_default_attroffset(ip) >> 3; | |
261 | ||
262 | if (dfl_forkoff > ip->i_d.di_forkoff) | |
263 | ip->i_d.di_forkoff = dfl_forkoff; | |
264 | } | |
1e82379b DC |
265 | } |
266 | ||
9e5987a7 DC |
267 | #ifdef DEBUG |
268 | STATIC struct xfs_buf * | |
269 | xfs_bmap_get_bp( | |
270 | struct xfs_btree_cur *cur, | |
271 | xfs_fsblock_t bno) | |
272 | { | |
273 | struct xfs_log_item_desc *lidp; | |
274 | int i; | |
7574aa92 | 275 | |
9e5987a7 DC |
276 | if (!cur) |
277 | return NULL; | |
278 | ||
279 | for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { | |
280 | if (!cur->bc_bufs[i]) | |
281 | break; | |
282 | if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) | |
283 | return cur->bc_bufs[i]; | |
1da177e4 | 284 | } |
7574aa92 | 285 | |
9e5987a7 DC |
286 | /* Chase down all the log items to see if the bp is there */ |
287 | list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) { | |
288 | struct xfs_buf_log_item *bip; | |
289 | bip = (struct xfs_buf_log_item *)lidp->lid_item; | |
290 | if (bip->bli_item.li_type == XFS_LI_BUF && | |
291 | XFS_BUF_ADDR(bip->bli_buf) == bno) | |
292 | return bip->bli_buf; | |
293 | } | |
7574aa92 | 294 | |
9e5987a7 DC |
295 | return NULL; |
296 | } | |
0b1b213f | 297 | |
9e5987a7 DC |
298 | STATIC void |
299 | xfs_check_block( | |
300 | struct xfs_btree_block *block, | |
301 | xfs_mount_t *mp, | |
302 | int root, | |
303 | short sz) | |
304 | { | |
305 | int i, j, dmxr; | |
306 | __be64 *pp, *thispa; /* pointer to block address */ | |
307 | xfs_bmbt_key_t *prevp, *keyp; | |
1da177e4 | 308 | |
9e5987a7 | 309 | ASSERT(be16_to_cpu(block->bb_level) > 0); |
ec90c556 | 310 | |
9e5987a7 DC |
311 | prevp = NULL; |
312 | for( i = 1; i <= xfs_btree_get_numrecs(block); i++) { | |
313 | dmxr = mp->m_bmap_dmxr[0]; | |
314 | keyp = XFS_BMBT_KEY_ADDR(mp, block, i); | |
0b1b213f | 315 | |
9e5987a7 DC |
316 | if (prevp) { |
317 | ASSERT(be64_to_cpu(prevp->br_startoff) < | |
318 | be64_to_cpu(keyp->br_startoff)); | |
1da177e4 | 319 | } |
9e5987a7 | 320 | prevp = keyp; |
1da177e4 | 321 | |
1da177e4 | 322 | /* |
9e5987a7 | 323 | * Compare the block numbers to see if there are dups. |
1da177e4 | 324 | */ |
9e5987a7 DC |
325 | if (root) |
326 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz); | |
327 | else | |
328 | pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr); | |
0b1b213f | 329 | |
9e5987a7 DC |
330 | for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { |
331 | if (root) | |
332 | thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz); | |
333 | else | |
334 | thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr); | |
335 | if (*thispa == *pp) { | |
336 | xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld", | |
337 | __func__, j, i, | |
338 | (unsigned long long)be64_to_cpu(*thispa)); | |
339 | panic("%s: ptrs are equal in node\n", | |
340 | __func__); | |
341 | } | |
1da177e4 | 342 | } |
9e5987a7 DC |
343 | } |
344 | } | |
1da177e4 | 345 | |
9e5987a7 DC |
346 | /* |
347 | * Check that the extents for the inode ip are in the right order in all | |
e3543819 DC |
348 | * btree leaves. THis becomes prohibitively expensive for large extent count |
349 | * files, so don't bother with inodes that have more than 10,000 extents in | |
350 | * them. The btree record ordering checks will still be done, so for such large | |
351 | * bmapbt constructs that is going to catch most corruptions. | |
9e5987a7 | 352 | */ |
9e5987a7 DC |
353 | STATIC void |
354 | xfs_bmap_check_leaf_extents( | |
355 | xfs_btree_cur_t *cur, /* btree cursor or null */ | |
356 | xfs_inode_t *ip, /* incore inode pointer */ | |
357 | int whichfork) /* data or attr fork */ | |
358 | { | |
359 | struct xfs_btree_block *block; /* current btree block */ | |
360 | xfs_fsblock_t bno; /* block # of "block" */ | |
361 | xfs_buf_t *bp; /* buffer for "block" */ | |
362 | int error; /* error return value */ | |
363 | xfs_extnum_t i=0, j; /* index into the extents list */ | |
364 | xfs_ifork_t *ifp; /* fork structure */ | |
365 | int level; /* btree level, for checking */ | |
366 | xfs_mount_t *mp; /* file system mount structure */ | |
367 | __be64 *pp; /* pointer to block address */ | |
368 | xfs_bmbt_rec_t *ep; /* pointer to current extent */ | |
369 | xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */ | |
370 | xfs_bmbt_rec_t *nextp; /* pointer to next extent */ | |
371 | int bp_release = 0; | |
372 | ||
373 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) { | |
374 | return; | |
375 | } | |
376 | ||
e3543819 DC |
377 | /* skip large extent count inodes */ |
378 | if (ip->i_d.di_nextents > 10000) | |
379 | return; | |
380 | ||
9e5987a7 DC |
381 | bno = NULLFSBLOCK; |
382 | mp = ip->i_mount; | |
383 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
384 | block = ifp->if_broot; | |
385 | /* | |
386 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. | |
387 | */ | |
388 | level = be16_to_cpu(block->bb_level); | |
389 | ASSERT(level > 0); | |
390 | xfs_check_block(block, mp, 1, ifp->if_broot_bytes); | |
391 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); | |
392 | bno = be64_to_cpu(*pp); | |
393 | ||
d5cf09ba | 394 | ASSERT(bno != NULLFSBLOCK); |
9e5987a7 DC |
395 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
396 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
397 | ||
398 | /* | |
399 | * Go down the tree until leaf level is reached, following the first | |
400 | * pointer (leftmost) at each level. | |
401 | */ | |
402 | while (level-- > 0) { | |
403 | /* See if buf is in cur first */ | |
404 | bp_release = 0; | |
405 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
406 | if (!bp) { | |
407 | bp_release = 1; | |
408 | error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
409 | XFS_BMAP_BTREE_REF, | |
410 | &xfs_bmbt_buf_ops); | |
572a4cf0 | 411 | if (error) |
9e5987a7 | 412 | goto error_norelse; |
1da177e4 | 413 | } |
9e5987a7 | 414 | block = XFS_BUF_TO_BLOCK(bp); |
9e5987a7 DC |
415 | if (level == 0) |
416 | break; | |
1da177e4 | 417 | |
1da177e4 | 418 | /* |
9e5987a7 DC |
419 | * Check this block for basic sanity (increasing keys and |
420 | * no duplicate blocks). | |
1da177e4 | 421 | */ |
0b1b213f | 422 | |
9e5987a7 DC |
423 | xfs_check_block(block, mp, 0, 0); |
424 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); | |
425 | bno = be64_to_cpu(*pp); | |
c29aad41 ES |
426 | XFS_WANT_CORRUPTED_GOTO(mp, |
427 | XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
9e5987a7 DC |
428 | if (bp_release) { |
429 | bp_release = 0; | |
430 | xfs_trans_brelse(NULL, bp); | |
1da177e4 | 431 | } |
9e5987a7 | 432 | } |
ec90c556 | 433 | |
9e5987a7 DC |
434 | /* |
435 | * Here with bp and block set to the leftmost leaf node in the tree. | |
436 | */ | |
437 | i = 0; | |
438 | ||
439 | /* | |
440 | * Loop over all leaf nodes checking that all extents are in the right order. | |
441 | */ | |
442 | for (;;) { | |
443 | xfs_fsblock_t nextbno; | |
444 | xfs_extnum_t num_recs; | |
445 | ||
446 | ||
447 | num_recs = xfs_btree_get_numrecs(block); | |
1da177e4 | 448 | |
1da177e4 | 449 | /* |
9e5987a7 | 450 | * Read-ahead the next leaf block, if any. |
1da177e4 | 451 | */ |
8096b1eb | 452 | |
9e5987a7 | 453 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1da177e4 | 454 | |
1da177e4 | 455 | /* |
9e5987a7 DC |
456 | * Check all the extents to make sure they are OK. |
457 | * If we had a previous block, the last entry should | |
458 | * conform with the first entry in this one. | |
1da177e4 | 459 | */ |
ec90c556 | 460 | |
9e5987a7 DC |
461 | ep = XFS_BMBT_REC_ADDR(mp, block, 1); |
462 | if (i) { | |
463 | ASSERT(xfs_bmbt_disk_get_startoff(&last) + | |
464 | xfs_bmbt_disk_get_blockcount(&last) <= | |
465 | xfs_bmbt_disk_get_startoff(ep)); | |
466 | } | |
467 | for (j = 1; j < num_recs; j++) { | |
468 | nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1); | |
469 | ASSERT(xfs_bmbt_disk_get_startoff(ep) + | |
470 | xfs_bmbt_disk_get_blockcount(ep) <= | |
471 | xfs_bmbt_disk_get_startoff(nextp)); | |
472 | ep = nextp; | |
473 | } | |
1da177e4 | 474 | |
9e5987a7 DC |
475 | last = *ep; |
476 | i += num_recs; | |
477 | if (bp_release) { | |
478 | bp_release = 0; | |
479 | xfs_trans_brelse(NULL, bp); | |
480 | } | |
481 | bno = nextbno; | |
1da177e4 | 482 | /* |
9e5987a7 | 483 | * If we've reached the end, stop. |
1da177e4 | 484 | */ |
9e5987a7 DC |
485 | if (bno == NULLFSBLOCK) |
486 | break; | |
8096b1eb | 487 | |
9e5987a7 DC |
488 | bp_release = 0; |
489 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
490 | if (!bp) { | |
491 | bp_release = 1; | |
492 | error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
493 | XFS_BMAP_BTREE_REF, | |
494 | &xfs_bmbt_buf_ops); | |
b9b984d7 | 495 | if (error) |
9e5987a7 | 496 | goto error_norelse; |
1da177e4 | 497 | } |
9e5987a7 | 498 | block = XFS_BUF_TO_BLOCK(bp); |
a5bd606b | 499 | } |
a5fd276b | 500 | |
9e5987a7 | 501 | return; |
a5bd606b | 502 | |
9e5987a7 DC |
503 | error0: |
504 | xfs_warn(mp, "%s: at error0", __func__); | |
505 | if (bp_release) | |
506 | xfs_trans_brelse(NULL, bp); | |
507 | error_norelse: | |
508 | xfs_warn(mp, "%s: BAD after btree leaves for %d extents", | |
509 | __func__, i); | |
510 | panic("%s: CORRUPTED BTREE OR SOMETHING", __func__); | |
511 | return; | |
1da177e4 LT |
512 | } |
513 | ||
514 | /* | |
9e5987a7 | 515 | * Add bmap trace insert entries for all the contents of the extent records. |
1da177e4 | 516 | */ |
9e5987a7 DC |
517 | void |
518 | xfs_bmap_trace_exlist( | |
519 | xfs_inode_t *ip, /* incore inode pointer */ | |
520 | xfs_extnum_t cnt, /* count of entries in the list */ | |
c44a1f22 | 521 | int whichfork, /* data or attr or cow fork */ |
9e5987a7 | 522 | unsigned long caller_ip) |
1da177e4 | 523 | { |
9e5987a7 DC |
524 | xfs_extnum_t idx; /* extent record index */ |
525 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
526 | int state = 0; | |
a5bd606b | 527 | |
9e5987a7 DC |
528 | if (whichfork == XFS_ATTR_FORK) |
529 | state |= BMAP_ATTRFORK; | |
c44a1f22 ES |
530 | else if (whichfork == XFS_COW_FORK) |
531 | state |= BMAP_COWFORK; | |
a5bd606b | 532 | |
9e5987a7 | 533 | ifp = XFS_IFORK_PTR(ip, whichfork); |
5d829300 | 534 | ASSERT(cnt == xfs_iext_count(ifp)); |
9e5987a7 | 535 | for (idx = 0; idx < cnt; idx++) |
7710517f | 536 | trace_xfs_extlist(ip, idx, state, caller_ip); |
9e5987a7 | 537 | } |
a5bd606b | 538 | |
9e5987a7 DC |
539 | /* |
540 | * Validate that the bmbt_irecs being returned from bmapi are valid | |
a97f4df7 ZYW |
541 | * given the caller's original parameters. Specifically check the |
542 | * ranges of the returned irecs to ensure that they only extend beyond | |
9e5987a7 DC |
543 | * the given parameters if the XFS_BMAPI_ENTIRE flag was set. |
544 | */ | |
545 | STATIC void | |
546 | xfs_bmap_validate_ret( | |
547 | xfs_fileoff_t bno, | |
548 | xfs_filblks_t len, | |
549 | int flags, | |
550 | xfs_bmbt_irec_t *mval, | |
551 | int nmap, | |
552 | int ret_nmap) | |
553 | { | |
554 | int i; /* index to map values */ | |
a5bd606b | 555 | |
9e5987a7 | 556 | ASSERT(ret_nmap <= nmap); |
a5bd606b | 557 | |
9e5987a7 DC |
558 | for (i = 0; i < ret_nmap; i++) { |
559 | ASSERT(mval[i].br_blockcount > 0); | |
560 | if (!(flags & XFS_BMAPI_ENTIRE)) { | |
561 | ASSERT(mval[i].br_startoff >= bno); | |
562 | ASSERT(mval[i].br_blockcount <= len); | |
563 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= | |
564 | bno + len); | |
565 | } else { | |
566 | ASSERT(mval[i].br_startoff < bno + len); | |
567 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount > | |
568 | bno); | |
569 | } | |
570 | ASSERT(i == 0 || | |
571 | mval[i - 1].br_startoff + mval[i - 1].br_blockcount == | |
572 | mval[i].br_startoff); | |
573 | ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && | |
574 | mval[i].br_startblock != HOLESTARTBLOCK); | |
575 | ASSERT(mval[i].br_state == XFS_EXT_NORM || | |
576 | mval[i].br_state == XFS_EXT_UNWRITTEN); | |
577 | } | |
578 | } | |
7574aa92 | 579 | |
9e5987a7 DC |
580 | #else |
581 | #define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0) | |
582 | #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) | |
583 | #endif /* DEBUG */ | |
7574aa92 | 584 | |
9e5987a7 DC |
585 | /* |
586 | * bmap free list manipulation functions | |
587 | */ | |
7574aa92 | 588 | |
9e5987a7 DC |
589 | /* |
590 | * Add the extent to the list of extents to be free at transaction end. | |
591 | * The list is maintained sorted (by block number). | |
592 | */ | |
593 | void | |
594 | xfs_bmap_add_free( | |
340785cc DW |
595 | struct xfs_mount *mp, |
596 | struct xfs_defer_ops *dfops, | |
597 | xfs_fsblock_t bno, | |
598 | xfs_filblks_t len, | |
599 | struct xfs_owner_info *oinfo) | |
9e5987a7 | 600 | { |
310a75a3 | 601 | struct xfs_extent_free_item *new; /* new element */ |
9e5987a7 DC |
602 | #ifdef DEBUG |
603 | xfs_agnumber_t agno; | |
604 | xfs_agblock_t agbno; | |
605 | ||
606 | ASSERT(bno != NULLFSBLOCK); | |
607 | ASSERT(len > 0); | |
608 | ASSERT(len <= MAXEXTLEN); | |
609 | ASSERT(!isnullstartblock(bno)); | |
610 | agno = XFS_FSB_TO_AGNO(mp, bno); | |
611 | agbno = XFS_FSB_TO_AGBNO(mp, bno); | |
612 | ASSERT(agno < mp->m_sb.sb_agcount); | |
613 | ASSERT(agbno < mp->m_sb.sb_agblocks); | |
614 | ASSERT(len < mp->m_sb.sb_agblocks); | |
615 | ASSERT(agbno + len <= mp->m_sb.sb_agblocks); | |
616 | #endif | |
617 | ASSERT(xfs_bmap_free_item_zone != NULL); | |
340785cc | 618 | |
9e5987a7 | 619 | new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP); |
310a75a3 DW |
620 | new->xefi_startblock = bno; |
621 | new->xefi_blockcount = (xfs_extlen_t)len; | |
340785cc DW |
622 | if (oinfo) |
623 | new->xefi_oinfo = *oinfo; | |
624 | else | |
625 | xfs_rmap_skip_owner_update(&new->xefi_oinfo); | |
ba9e7802 DW |
626 | trace_xfs_bmap_free_defer(mp, XFS_FSB_TO_AGNO(mp, bno), 0, |
627 | XFS_FSB_TO_AGBNO(mp, bno), len); | |
2c3234d1 | 628 | xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_FREE, &new->xefi_list); |
9e5987a7 | 629 | } |
0b1b213f | 630 | |
9e5987a7 DC |
631 | /* |
632 | * Inode fork format manipulation functions | |
633 | */ | |
1da177e4 | 634 | |
9e5987a7 DC |
635 | /* |
636 | * Transform a btree format file with only one leaf node, where the | |
637 | * extents list will fit in the inode, into an extents format file. | |
638 | * Since the file extents are already in-core, all we have to do is | |
639 | * give up the space for the btree root and pitch the leaf block. | |
640 | */ | |
641 | STATIC int /* error */ | |
642 | xfs_bmap_btree_to_extents( | |
643 | xfs_trans_t *tp, /* transaction pointer */ | |
644 | xfs_inode_t *ip, /* incore inode pointer */ | |
645 | xfs_btree_cur_t *cur, /* btree cursor */ | |
646 | int *logflagsp, /* inode logging flags */ | |
647 | int whichfork) /* data or attr fork */ | |
648 | { | |
649 | /* REFERENCED */ | |
650 | struct xfs_btree_block *cblock;/* child btree block */ | |
651 | xfs_fsblock_t cbno; /* child block number */ | |
652 | xfs_buf_t *cbp; /* child block's buffer */ | |
653 | int error; /* error return value */ | |
654 | xfs_ifork_t *ifp; /* inode fork data */ | |
655 | xfs_mount_t *mp; /* mount point structure */ | |
656 | __be64 *pp; /* ptr to block address */ | |
657 | struct xfs_btree_block *rblock;/* root btree block */ | |
340785cc | 658 | struct xfs_owner_info oinfo; |
1da177e4 | 659 | |
9e5987a7 DC |
660 | mp = ip->i_mount; |
661 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
60b4984f | 662 | ASSERT(whichfork != XFS_COW_FORK); |
9e5987a7 DC |
663 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); |
664 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
665 | rblock = ifp->if_broot; | |
666 | ASSERT(be16_to_cpu(rblock->bb_level) == 1); | |
667 | ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); | |
668 | ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1); | |
669 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes); | |
670 | cbno = be64_to_cpu(*pp); | |
671 | *logflagsp = 0; | |
672 | #ifdef DEBUG | |
673 | if ((error = xfs_btree_check_lptr(cur, cbno, 1))) | |
674 | return error; | |
675 | #endif | |
676 | error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF, | |
677 | &xfs_bmbt_buf_ops); | |
678 | if (error) | |
679 | return error; | |
680 | cblock = XFS_BUF_TO_BLOCK(cbp); | |
681 | if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) | |
682 | return error; | |
340785cc DW |
683 | xfs_rmap_ino_bmbt_owner(&oinfo, ip->i_ino, whichfork); |
684 | xfs_bmap_add_free(mp, cur->bc_private.b.dfops, cbno, 1, &oinfo); | |
9e5987a7 DC |
685 | ip->i_d.di_nblocks--; |
686 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); | |
687 | xfs_trans_binval(tp, cbp); | |
688 | if (cur->bc_bufs[0] == cbp) | |
689 | cur->bc_bufs[0] = NULL; | |
690 | xfs_iroot_realloc(ip, -1, whichfork); | |
691 | ASSERT(ifp->if_broot == NULL); | |
692 | ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); | |
693 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
694 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
695 | return 0; | |
696 | } | |
0b1b213f | 697 | |
9e5987a7 DC |
698 | /* |
699 | * Convert an extents-format file into a btree-format file. | |
700 | * The new file will have a root block (in the inode) and a single child block. | |
701 | */ | |
702 | STATIC int /* error */ | |
703 | xfs_bmap_extents_to_btree( | |
704 | xfs_trans_t *tp, /* transaction pointer */ | |
705 | xfs_inode_t *ip, /* incore inode pointer */ | |
706 | xfs_fsblock_t *firstblock, /* first-block-allocated */ | |
2c3234d1 | 707 | struct xfs_defer_ops *dfops, /* blocks freed in xaction */ |
9e5987a7 DC |
708 | xfs_btree_cur_t **curp, /* cursor returned to caller */ |
709 | int wasdel, /* converting a delayed alloc */ | |
710 | int *logflagsp, /* inode logging flags */ | |
711 | int whichfork) /* data or attr fork */ | |
712 | { | |
713 | struct xfs_btree_block *ablock; /* allocated (child) bt block */ | |
714 | xfs_buf_t *abp; /* buffer for ablock */ | |
715 | xfs_alloc_arg_t args; /* allocation arguments */ | |
716 | xfs_bmbt_rec_t *arp; /* child record pointer */ | |
717 | struct xfs_btree_block *block; /* btree root block */ | |
718 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
719 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
720 | int error; /* error return value */ | |
721 | xfs_extnum_t i, cnt; /* extent record index */ | |
722 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
723 | xfs_bmbt_key_t *kp; /* root block key pointer */ | |
724 | xfs_mount_t *mp; /* mount structure */ | |
725 | xfs_extnum_t nextents; /* number of file extents */ | |
726 | xfs_bmbt_ptr_t *pp; /* root block address pointer */ | |
1da177e4 | 727 | |
ee1a47ab | 728 | mp = ip->i_mount; |
60b4984f | 729 | ASSERT(whichfork != XFS_COW_FORK); |
9e5987a7 DC |
730 | ifp = XFS_IFORK_PTR(ip, whichfork); |
731 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); | |
0b1b213f | 732 | |
9e5987a7 DC |
733 | /* |
734 | * Make space in the inode incore. | |
735 | */ | |
736 | xfs_iroot_realloc(ip, 1, whichfork); | |
737 | ifp->if_flags |= XFS_IFBROOT; | |
ec90c556 | 738 | |
9e5987a7 DC |
739 | /* |
740 | * Fill in the root. | |
741 | */ | |
742 | block = ifp->if_broot; | |
ee1a47ab CH |
743 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
744 | xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, | |
745 | XFS_BMAP_CRC_MAGIC, 1, 1, ip->i_ino, | |
746 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
747 | else | |
748 | xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, | |
749 | XFS_BMAP_MAGIC, 1, 1, ip->i_ino, | |
750 | XFS_BTREE_LONG_PTRS); | |
0b1b213f | 751 | |
9e5987a7 DC |
752 | /* |
753 | * Need a cursor. Can't allocate until bb_level is filled in. | |
754 | */ | |
9e5987a7 DC |
755 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); |
756 | cur->bc_private.b.firstblock = *firstblock; | |
2c3234d1 | 757 | cur->bc_private.b.dfops = dfops; |
9e5987a7 DC |
758 | cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; |
759 | /* | |
760 | * Convert to a btree with two levels, one record in root. | |
761 | */ | |
762 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); | |
763 | memset(&args, 0, sizeof(args)); | |
764 | args.tp = tp; | |
765 | args.mp = mp; | |
340785cc | 766 | xfs_rmap_ino_bmbt_owner(&args.oinfo, ip->i_ino, whichfork); |
9e5987a7 DC |
767 | args.firstblock = *firstblock; |
768 | if (*firstblock == NULLFSBLOCK) { | |
769 | args.type = XFS_ALLOCTYPE_START_BNO; | |
770 | args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); | |
2c3234d1 | 771 | } else if (dfops->dop_low) { |
90e2056d | 772 | try_another_ag: |
9e5987a7 DC |
773 | args.type = XFS_ALLOCTYPE_START_BNO; |
774 | args.fsbno = *firstblock; | |
775 | } else { | |
776 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
777 | args.fsbno = *firstblock; | |
778 | } | |
779 | args.minlen = args.maxlen = args.prod = 1; | |
780 | args.wasdel = wasdel; | |
781 | *logflagsp = 0; | |
782 | if ((error = xfs_alloc_vextent(&args))) { | |
783 | xfs_iroot_realloc(ip, -1, whichfork); | |
784 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
785 | return error; | |
786 | } | |
90e2056d DW |
787 | |
788 | /* | |
789 | * During a CoW operation, the allocation and bmbt updates occur in | |
790 | * different transactions. The mapping code tries to put new bmbt | |
791 | * blocks near extents being mapped, but the only way to guarantee this | |
792 | * is if the alloc and the mapping happen in a single transaction that | |
793 | * has a block reservation. That isn't the case here, so if we run out | |
794 | * of space we'll try again with another AG. | |
795 | */ | |
796 | if (xfs_sb_version_hasreflink(&cur->bc_mp->m_sb) && | |
797 | args.fsbno == NULLFSBLOCK && | |
798 | args.type == XFS_ALLOCTYPE_NEAR_BNO) { | |
799 | dfops->dop_low = true; | |
800 | goto try_another_ag; | |
801 | } | |
9e5987a7 DC |
802 | /* |
803 | * Allocation can't fail, the space was reserved. | |
804 | */ | |
805 | ASSERT(args.fsbno != NULLFSBLOCK); | |
806 | ASSERT(*firstblock == NULLFSBLOCK || | |
807 | args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) || | |
2c3234d1 | 808 | (dfops->dop_low && |
9e5987a7 DC |
809 | args.agno > XFS_FSB_TO_AGNO(mp, *firstblock))); |
810 | *firstblock = cur->bc_private.b.firstblock = args.fsbno; | |
811 | cur->bc_private.b.allocated++; | |
812 | ip->i_d.di_nblocks++; | |
813 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); | |
814 | abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0); | |
815 | /* | |
816 | * Fill in the child block. | |
817 | */ | |
818 | abp->b_ops = &xfs_bmbt_buf_ops; | |
819 | ablock = XFS_BUF_TO_BLOCK(abp); | |
ee1a47ab CH |
820 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
821 | xfs_btree_init_block_int(mp, ablock, abp->b_bn, | |
822 | XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino, | |
823 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
824 | else | |
825 | xfs_btree_init_block_int(mp, ablock, abp->b_bn, | |
826 | XFS_BMAP_MAGIC, 0, 0, ip->i_ino, | |
827 | XFS_BTREE_LONG_PTRS); | |
828 | ||
9e5987a7 | 829 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); |
5d829300 | 830 | nextents = xfs_iext_count(ifp); |
9e5987a7 DC |
831 | for (cnt = i = 0; i < nextents; i++) { |
832 | ep = xfs_iext_get_ext(ifp, i); | |
833 | if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) { | |
834 | arp->l0 = cpu_to_be64(ep->l0); | |
835 | arp->l1 = cpu_to_be64(ep->l1); | |
836 | arp++; cnt++; | |
1da177e4 | 837 | } |
9e5987a7 DC |
838 | } |
839 | ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork)); | |
840 | xfs_btree_set_numrecs(ablock, cnt); | |
1da177e4 | 841 | |
9e5987a7 DC |
842 | /* |
843 | * Fill in the root key and pointer. | |
844 | */ | |
845 | kp = XFS_BMBT_KEY_ADDR(mp, block, 1); | |
846 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); | |
847 | kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp)); | |
848 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur, | |
849 | be16_to_cpu(block->bb_level))); | |
850 | *pp = cpu_to_be64(args.fsbno); | |
ec90c556 | 851 | |
9e5987a7 DC |
852 | /* |
853 | * Do all this logging at the end so that | |
854 | * the root is at the right level. | |
855 | */ | |
856 | xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS); | |
857 | xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); | |
858 | ASSERT(*curp == NULL); | |
859 | *curp = cur; | |
860 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork); | |
861 | return 0; | |
862 | } | |
ec90c556 | 863 | |
9e5987a7 DC |
864 | /* |
865 | * Convert a local file to an extents file. | |
866 | * This code is out of bounds for data forks of regular files, | |
867 | * since the file data needs to get logged so things will stay consistent. | |
868 | * (The bmap-level manipulations are ok, though). | |
869 | */ | |
f3508bcd DC |
870 | void |
871 | xfs_bmap_local_to_extents_empty( | |
872 | struct xfs_inode *ip, | |
873 | int whichfork) | |
874 | { | |
875 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
876 | ||
60b4984f | 877 | ASSERT(whichfork != XFS_COW_FORK); |
f3508bcd DC |
878 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); |
879 | ASSERT(ifp->if_bytes == 0); | |
880 | ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); | |
881 | ||
6a9edd3d | 882 | xfs_bmap_forkoff_reset(ip, whichfork); |
f3508bcd DC |
883 | ifp->if_flags &= ~XFS_IFINLINE; |
884 | ifp->if_flags |= XFS_IFEXTENTS; | |
885 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
886 | } | |
887 | ||
888 | ||
9e5987a7 DC |
889 | STATIC int /* error */ |
890 | xfs_bmap_local_to_extents( | |
891 | xfs_trans_t *tp, /* transaction pointer */ | |
892 | xfs_inode_t *ip, /* incore inode pointer */ | |
893 | xfs_fsblock_t *firstblock, /* first block allocated in xaction */ | |
894 | xfs_extlen_t total, /* total blocks needed by transaction */ | |
895 | int *logflagsp, /* inode logging flags */ | |
896 | int whichfork, | |
ee1a47ab CH |
897 | void (*init_fn)(struct xfs_trans *tp, |
898 | struct xfs_buf *bp, | |
9e5987a7 DC |
899 | struct xfs_inode *ip, |
900 | struct xfs_ifork *ifp)) | |
901 | { | |
f3508bcd | 902 | int error = 0; |
9e5987a7 DC |
903 | int flags; /* logging flags returned */ |
904 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
f3508bcd DC |
905 | xfs_alloc_arg_t args; /* allocation arguments */ |
906 | xfs_buf_t *bp; /* buffer for extent block */ | |
907 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
0b1b213f | 908 | |
9e5987a7 DC |
909 | /* |
910 | * We don't want to deal with the case of keeping inode data inline yet. | |
911 | * So sending the data fork of a regular inode is invalid. | |
912 | */ | |
c19b3b05 | 913 | ASSERT(!(S_ISREG(VFS_I(ip)->i_mode) && whichfork == XFS_DATA_FORK)); |
9e5987a7 DC |
914 | ifp = XFS_IFORK_PTR(ip, whichfork); |
915 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
f3508bcd DC |
916 | |
917 | if (!ifp->if_bytes) { | |
918 | xfs_bmap_local_to_extents_empty(ip, whichfork); | |
919 | flags = XFS_ILOG_CORE; | |
920 | goto done; | |
921 | } | |
922 | ||
9e5987a7 DC |
923 | flags = 0; |
924 | error = 0; | |
f3508bcd DC |
925 | ASSERT((ifp->if_flags & (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == |
926 | XFS_IFINLINE); | |
927 | memset(&args, 0, sizeof(args)); | |
928 | args.tp = tp; | |
929 | args.mp = ip->i_mount; | |
340785cc | 930 | xfs_rmap_ino_owner(&args.oinfo, ip->i_ino, whichfork, 0); |
f3508bcd DC |
931 | args.firstblock = *firstblock; |
932 | /* | |
933 | * Allocate a block. We know we need only one, since the | |
934 | * file currently fits in an inode. | |
935 | */ | |
936 | if (*firstblock == NULLFSBLOCK) { | |
90e2056d | 937 | try_another_ag: |
f3508bcd DC |
938 | args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); |
939 | args.type = XFS_ALLOCTYPE_START_BNO; | |
9e5987a7 | 940 | } else { |
f3508bcd DC |
941 | args.fsbno = *firstblock; |
942 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
9e5987a7 | 943 | } |
f3508bcd DC |
944 | args.total = total; |
945 | args.minlen = args.maxlen = args.prod = 1; | |
946 | error = xfs_alloc_vextent(&args); | |
947 | if (error) | |
948 | goto done; | |
949 | ||
90e2056d DW |
950 | /* |
951 | * During a CoW operation, the allocation and bmbt updates occur in | |
952 | * different transactions. The mapping code tries to put new bmbt | |
953 | * blocks near extents being mapped, but the only way to guarantee this | |
954 | * is if the alloc and the mapping happen in a single transaction that | |
955 | * has a block reservation. That isn't the case here, so if we run out | |
956 | * of space we'll try again with another AG. | |
957 | */ | |
958 | if (xfs_sb_version_hasreflink(&ip->i_mount->m_sb) && | |
959 | args.fsbno == NULLFSBLOCK && | |
960 | args.type == XFS_ALLOCTYPE_NEAR_BNO) { | |
961 | goto try_another_ag; | |
962 | } | |
f3508bcd DC |
963 | /* Can't fail, the space was reserved. */ |
964 | ASSERT(args.fsbno != NULLFSBLOCK); | |
965 | ASSERT(args.len == 1); | |
966 | *firstblock = args.fsbno; | |
967 | bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); | |
968 | ||
fe22d552 | 969 | /* |
b7cdc66b | 970 | * Initialize the block, copy the data and log the remote buffer. |
fe22d552 | 971 | * |
b7cdc66b BF |
972 | * The callout is responsible for logging because the remote format |
973 | * might differ from the local format and thus we don't know how much to | |
974 | * log here. Note that init_fn must also set the buffer log item type | |
975 | * correctly. | |
fe22d552 | 976 | */ |
f3508bcd DC |
977 | init_fn(tp, bp, ip, ifp); |
978 | ||
b7cdc66b | 979 | /* account for the change in fork size */ |
f3508bcd DC |
980 | xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); |
981 | xfs_bmap_local_to_extents_empty(ip, whichfork); | |
9e5987a7 | 982 | flags |= XFS_ILOG_CORE; |
f3508bcd DC |
983 | |
984 | xfs_iext_add(ifp, 0, 1); | |
985 | ep = xfs_iext_get_ext(ifp, 0); | |
986 | xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM); | |
987 | trace_xfs_bmap_post_update(ip, 0, | |
988 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0, | |
989 | _THIS_IP_); | |
990 | XFS_IFORK_NEXT_SET(ip, whichfork, 1); | |
991 | ip->i_d.di_nblocks = 1; | |
992 | xfs_trans_mod_dquot_byino(tp, ip, | |
993 | XFS_TRANS_DQ_BCOUNT, 1L); | |
994 | flags |= xfs_ilog_fext(whichfork); | |
995 | ||
9e5987a7 DC |
996 | done: |
997 | *logflagsp = flags; | |
998 | return error; | |
999 | } | |
ec90c556 | 1000 | |
9e5987a7 DC |
1001 | /* |
1002 | * Called from xfs_bmap_add_attrfork to handle btree format files. | |
1003 | */ | |
1004 | STATIC int /* error */ | |
1005 | xfs_bmap_add_attrfork_btree( | |
1006 | xfs_trans_t *tp, /* transaction pointer */ | |
1007 | xfs_inode_t *ip, /* incore inode pointer */ | |
1008 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
2c3234d1 | 1009 | struct xfs_defer_ops *dfops, /* blocks to free at commit */ |
9e5987a7 DC |
1010 | int *flags) /* inode logging flags */ |
1011 | { | |
1012 | xfs_btree_cur_t *cur; /* btree cursor */ | |
1013 | int error; /* error return value */ | |
1014 | xfs_mount_t *mp; /* file system mount struct */ | |
1015 | int stat; /* newroot status */ | |
ec90c556 | 1016 | |
9e5987a7 DC |
1017 | mp = ip->i_mount; |
1018 | if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip)) | |
1019 | *flags |= XFS_ILOG_DBROOT; | |
1020 | else { | |
1021 | cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); | |
2c3234d1 | 1022 | cur->bc_private.b.dfops = dfops; |
9e5987a7 DC |
1023 | cur->bc_private.b.firstblock = *firstblock; |
1024 | if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat))) | |
1025 | goto error0; | |
1026 | /* must be at least one entry */ | |
c29aad41 | 1027 | XFS_WANT_CORRUPTED_GOTO(mp, stat == 1, error0); |
9e5987a7 DC |
1028 | if ((error = xfs_btree_new_iroot(cur, flags, &stat))) |
1029 | goto error0; | |
1030 | if (stat == 0) { | |
1031 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
2451337d | 1032 | return -ENOSPC; |
1da177e4 | 1033 | } |
9e5987a7 DC |
1034 | *firstblock = cur->bc_private.b.firstblock; |
1035 | cur->bc_private.b.allocated = 0; | |
1036 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
1da177e4 | 1037 | } |
9e5987a7 DC |
1038 | return 0; |
1039 | error0: | |
1040 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
1041 | return error; | |
1042 | } | |
a5bd606b | 1043 | |
9e5987a7 DC |
1044 | /* |
1045 | * Called from xfs_bmap_add_attrfork to handle extents format files. | |
1046 | */ | |
1047 | STATIC int /* error */ | |
1048 | xfs_bmap_add_attrfork_extents( | |
1049 | xfs_trans_t *tp, /* transaction pointer */ | |
1050 | xfs_inode_t *ip, /* incore inode pointer */ | |
1051 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
2c3234d1 | 1052 | struct xfs_defer_ops *dfops, /* blocks to free at commit */ |
9e5987a7 DC |
1053 | int *flags) /* inode logging flags */ |
1054 | { | |
1055 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
1056 | int error; /* error return value */ | |
a5bd606b | 1057 | |
9e5987a7 DC |
1058 | if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip)) |
1059 | return 0; | |
1060 | cur = NULL; | |
2c3234d1 | 1061 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, &cur, 0, |
9e5987a7 | 1062 | flags, XFS_DATA_FORK); |
a5bd606b CH |
1063 | if (cur) { |
1064 | cur->bc_private.b.allocated = 0; | |
9e5987a7 DC |
1065 | xfs_btree_del_cursor(cur, |
1066 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
a5bd606b | 1067 | } |
1da177e4 | 1068 | return error; |
1da177e4 LT |
1069 | } |
1070 | ||
9e5987a7 DC |
1071 | /* |
1072 | * Called from xfs_bmap_add_attrfork to handle local format files. Each | |
1073 | * different data fork content type needs a different callout to do the | |
1074 | * conversion. Some are basic and only require special block initialisation | |
1075 | * callouts for the data formating, others (directories) are so specialised they | |
1076 | * handle everything themselves. | |
1077 | * | |
1078 | * XXX (dgc): investigate whether directory conversion can use the generic | |
1079 | * formatting callout. It should be possible - it's just a very complex | |
ee1a47ab | 1080 | * formatter. |
9e5987a7 DC |
1081 | */ |
1082 | STATIC int /* error */ | |
1083 | xfs_bmap_add_attrfork_local( | |
1084 | xfs_trans_t *tp, /* transaction pointer */ | |
1085 | xfs_inode_t *ip, /* incore inode pointer */ | |
1086 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
2c3234d1 | 1087 | struct xfs_defer_ops *dfops, /* blocks to free at commit */ |
9e5987a7 DC |
1088 | int *flags) /* inode logging flags */ |
1089 | { | |
1090 | xfs_da_args_t dargs; /* args for dir/attr code */ | |
7574aa92 | 1091 | |
9e5987a7 DC |
1092 | if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) |
1093 | return 0; | |
7574aa92 | 1094 | |
c19b3b05 | 1095 | if (S_ISDIR(VFS_I(ip)->i_mode)) { |
9e5987a7 | 1096 | memset(&dargs, 0, sizeof(dargs)); |
d6cf1305 | 1097 | dargs.geo = ip->i_mount->m_dir_geo; |
9e5987a7 DC |
1098 | dargs.dp = ip; |
1099 | dargs.firstblock = firstblock; | |
2c3234d1 | 1100 | dargs.dfops = dfops; |
d6cf1305 | 1101 | dargs.total = dargs.geo->fsbcount; |
9e5987a7 DC |
1102 | dargs.whichfork = XFS_DATA_FORK; |
1103 | dargs.trans = tp; | |
1104 | return xfs_dir2_sf_to_block(&dargs); | |
1da177e4 | 1105 | } |
7574aa92 | 1106 | |
c19b3b05 | 1107 | if (S_ISLNK(VFS_I(ip)->i_mode)) |
9e5987a7 DC |
1108 | return xfs_bmap_local_to_extents(tp, ip, firstblock, 1, |
1109 | flags, XFS_DATA_FORK, | |
1110 | xfs_symlink_local_to_remote); | |
7574aa92 | 1111 | |
f3508bcd DC |
1112 | /* should only be called for types that support local format data */ |
1113 | ASSERT(0); | |
2451337d | 1114 | return -EFSCORRUPTED; |
9e5987a7 | 1115 | } |
0b1b213f | 1116 | |
9e5987a7 DC |
1117 | /* |
1118 | * Convert inode from non-attributed to attributed. | |
1119 | * Must not be in a transaction, ip must not be locked. | |
1120 | */ | |
1121 | int /* error code */ | |
1122 | xfs_bmap_add_attrfork( | |
1123 | xfs_inode_t *ip, /* incore inode pointer */ | |
1124 | int size, /* space new attribute needs */ | |
1125 | int rsvd) /* xact may use reserved blks */ | |
1126 | { | |
1127 | xfs_fsblock_t firstblock; /* 1st block/ag allocated */ | |
2c3234d1 | 1128 | struct xfs_defer_ops dfops; /* freed extent records */ |
9e5987a7 DC |
1129 | xfs_mount_t *mp; /* mount structure */ |
1130 | xfs_trans_t *tp; /* transaction pointer */ | |
1131 | int blks; /* space reservation */ | |
1132 | int version = 1; /* superblock attr version */ | |
9e5987a7 DC |
1133 | int logflags; /* logging flags */ |
1134 | int error; /* error return value */ | |
0b1b213f | 1135 | |
9e5987a7 | 1136 | ASSERT(XFS_IFORK_Q(ip) == 0); |
1da177e4 | 1137 | |
9e5987a7 DC |
1138 | mp = ip->i_mount; |
1139 | ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); | |
253f4911 | 1140 | |
9e5987a7 | 1141 | blks = XFS_ADDAFORK_SPACE_RES(mp); |
253f4911 CH |
1142 | |
1143 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_addafork, blks, 0, | |
1144 | rsvd ? XFS_TRANS_RESERVE : 0, &tp); | |
1145 | if (error) | |
9e3908e3 | 1146 | return error; |
253f4911 | 1147 | |
9e5987a7 DC |
1148 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
1149 | error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ? | |
1150 | XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : | |
1151 | XFS_QMOPT_RES_REGBLKS); | |
9e3908e3 MT |
1152 | if (error) |
1153 | goto trans_cancel; | |
9e5987a7 | 1154 | if (XFS_IFORK_Q(ip)) |
9e3908e3 | 1155 | goto trans_cancel; |
9e5987a7 | 1156 | if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) { |
1da177e4 | 1157 | /* |
9e5987a7 | 1158 | * For inodes coming from pre-6.2 filesystems. |
1da177e4 | 1159 | */ |
9e5987a7 DC |
1160 | ASSERT(ip->i_d.di_aformat == 0); |
1161 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
1162 | } | |
1163 | ASSERT(ip->i_d.di_anextents == 0); | |
ec90c556 | 1164 | |
9e3908e3 | 1165 | xfs_trans_ijoin(tp, ip, 0); |
9e5987a7 | 1166 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
1da177e4 | 1167 | |
9e5987a7 DC |
1168 | switch (ip->i_d.di_format) { |
1169 | case XFS_DINODE_FMT_DEV: | |
1170 | ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; | |
1171 | break; | |
1172 | case XFS_DINODE_FMT_UUID: | |
1173 | ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3; | |
1174 | break; | |
1175 | case XFS_DINODE_FMT_LOCAL: | |
1176 | case XFS_DINODE_FMT_EXTENTS: | |
1177 | case XFS_DINODE_FMT_BTREE: | |
1178 | ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size); | |
1179 | if (!ip->i_d.di_forkoff) | |
1180 | ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3; | |
1181 | else if (mp->m_flags & XFS_MOUNT_ATTR2) | |
1182 | version = 2; | |
1da177e4 | 1183 | break; |
9e5987a7 DC |
1184 | default: |
1185 | ASSERT(0); | |
2451337d | 1186 | error = -EINVAL; |
9e3908e3 | 1187 | goto trans_cancel; |
9e5987a7 | 1188 | } |
1da177e4 | 1189 | |
9e5987a7 DC |
1190 | ASSERT(ip->i_afp == NULL); |
1191 | ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); | |
1192 | ip->i_afp->if_flags = XFS_IFEXTENTS; | |
1193 | logflags = 0; | |
2c3234d1 | 1194 | xfs_defer_init(&dfops, &firstblock); |
9e5987a7 DC |
1195 | switch (ip->i_d.di_format) { |
1196 | case XFS_DINODE_FMT_LOCAL: | |
2c3234d1 | 1197 | error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &dfops, |
9e5987a7 DC |
1198 | &logflags); |
1199 | break; | |
1200 | case XFS_DINODE_FMT_EXTENTS: | |
1201 | error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock, | |
2c3234d1 | 1202 | &dfops, &logflags); |
9e5987a7 DC |
1203 | break; |
1204 | case XFS_DINODE_FMT_BTREE: | |
2c3234d1 | 1205 | error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &dfops, |
9e5987a7 DC |
1206 | &logflags); |
1207 | break; | |
1208 | default: | |
1209 | error = 0; | |
1da177e4 LT |
1210 | break; |
1211 | } | |
9e5987a7 DC |
1212 | if (logflags) |
1213 | xfs_trans_log_inode(tp, ip, logflags); | |
1214 | if (error) | |
9e3908e3 | 1215 | goto bmap_cancel; |
9e5987a7 DC |
1216 | if (!xfs_sb_version_hasattr(&mp->m_sb) || |
1217 | (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) { | |
61e63ecb | 1218 | bool log_sb = false; |
9e5987a7 DC |
1219 | |
1220 | spin_lock(&mp->m_sb_lock); | |
1221 | if (!xfs_sb_version_hasattr(&mp->m_sb)) { | |
1222 | xfs_sb_version_addattr(&mp->m_sb); | |
61e63ecb | 1223 | log_sb = true; |
9e5987a7 DC |
1224 | } |
1225 | if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) { | |
1226 | xfs_sb_version_addattr2(&mp->m_sb); | |
61e63ecb | 1227 | log_sb = true; |
9e5987a7 | 1228 | } |
4d11a402 | 1229 | spin_unlock(&mp->m_sb_lock); |
61e63ecb DC |
1230 | if (log_sb) |
1231 | xfs_log_sb(tp); | |
1da177e4 | 1232 | } |
9e5987a7 | 1233 | |
2c3234d1 | 1234 | error = xfs_defer_finish(&tp, &dfops, NULL); |
9e5987a7 | 1235 | if (error) |
9e3908e3 | 1236 | goto bmap_cancel; |
70393313 | 1237 | error = xfs_trans_commit(tp); |
9e3908e3 MT |
1238 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
1239 | return error; | |
1240 | ||
1241 | bmap_cancel: | |
2c3234d1 | 1242 | xfs_defer_cancel(&dfops); |
9e3908e3 | 1243 | trans_cancel: |
4906e215 | 1244 | xfs_trans_cancel(tp); |
9e5987a7 | 1245 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
9e5987a7 | 1246 | return error; |
1da177e4 LT |
1247 | } |
1248 | ||
1249 | /* | |
9e5987a7 | 1250 | * Internal and external extent tree search functions. |
1da177e4 | 1251 | */ |
a5bd606b | 1252 | |
9e5987a7 DC |
1253 | /* |
1254 | * Read in the extents to if_extents. | |
1255 | * All inode fields are set up by caller, we just traverse the btree | |
1256 | * and copy the records in. If the file system cannot contain unwritten | |
1257 | * extents, the records are checked for no "state" flags. | |
1258 | */ | |
1259 | int /* error */ | |
1260 | xfs_bmap_read_extents( | |
1261 | xfs_trans_t *tp, /* transaction pointer */ | |
1262 | xfs_inode_t *ip, /* incore inode */ | |
1263 | int whichfork) /* data or attr fork */ | |
1264 | { | |
1265 | struct xfs_btree_block *block; /* current btree block */ | |
1266 | xfs_fsblock_t bno; /* block # of "block" */ | |
1267 | xfs_buf_t *bp; /* buffer for "block" */ | |
1268 | int error; /* error return value */ | |
1269 | xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */ | |
1270 | xfs_extnum_t i, j; /* index into the extents list */ | |
1271 | xfs_ifork_t *ifp; /* fork structure */ | |
1272 | int level; /* btree level, for checking */ | |
1273 | xfs_mount_t *mp; /* file system mount structure */ | |
1274 | __be64 *pp; /* pointer to block address */ | |
1275 | /* REFERENCED */ | |
1276 | xfs_extnum_t room; /* number of entries there's room for */ | |
6ef35544 | 1277 | |
9e5987a7 DC |
1278 | bno = NULLFSBLOCK; |
1279 | mp = ip->i_mount; | |
1280 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1281 | exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE : | |
1282 | XFS_EXTFMT_INODE(ip); | |
1283 | block = ifp->if_broot; | |
1da177e4 | 1284 | /* |
9e5987a7 | 1285 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. |
1da177e4 | 1286 | */ |
9e5987a7 DC |
1287 | level = be16_to_cpu(block->bb_level); |
1288 | ASSERT(level > 0); | |
1289 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); | |
1290 | bno = be64_to_cpu(*pp); | |
d5cf09ba | 1291 | ASSERT(bno != NULLFSBLOCK); |
9e5987a7 DC |
1292 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
1293 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
1da177e4 | 1294 | /* |
9e5987a7 DC |
1295 | * Go down the tree until leaf level is reached, following the first |
1296 | * pointer (leftmost) at each level. | |
1da177e4 | 1297 | */ |
9e5987a7 DC |
1298 | while (level-- > 0) { |
1299 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
1300 | XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); | |
1301 | if (error) | |
1302 | return error; | |
1303 | block = XFS_BUF_TO_BLOCK(bp); | |
9e5987a7 DC |
1304 | if (level == 0) |
1305 | break; | |
1306 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); | |
1307 | bno = be64_to_cpu(*pp); | |
c29aad41 ES |
1308 | XFS_WANT_CORRUPTED_GOTO(mp, |
1309 | XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
9e5987a7 | 1310 | xfs_trans_brelse(tp, bp); |
1da177e4 LT |
1311 | } |
1312 | /* | |
9e5987a7 | 1313 | * Here with bp and block set to the leftmost leaf node in the tree. |
1da177e4 | 1314 | */ |
5d829300 | 1315 | room = xfs_iext_count(ifp); |
9e5987a7 | 1316 | i = 0; |
1da177e4 | 1317 | /* |
9e5987a7 | 1318 | * Loop over all leaf nodes. Copy information to the extent records. |
1da177e4 | 1319 | */ |
9e5987a7 DC |
1320 | for (;;) { |
1321 | xfs_bmbt_rec_t *frp; | |
1322 | xfs_fsblock_t nextbno; | |
1323 | xfs_extnum_t num_recs; | |
1324 | xfs_extnum_t start; | |
0b1b213f | 1325 | |
9e5987a7 DC |
1326 | num_recs = xfs_btree_get_numrecs(block); |
1327 | if (unlikely(i + num_recs > room)) { | |
1328 | ASSERT(i + num_recs <= room); | |
1329 | xfs_warn(ip->i_mount, | |
1330 | "corrupt dinode %Lu, (btree extents).", | |
1331 | (unsigned long long) ip->i_ino); | |
1332 | XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)", | |
1333 | XFS_ERRLEVEL_LOW, ip->i_mount, block); | |
1334 | goto error0; | |
1da177e4 | 1335 | } |
1da177e4 | 1336 | /* |
9e5987a7 | 1337 | * Read-ahead the next leaf block, if any. |
1da177e4 | 1338 | */ |
9e5987a7 DC |
1339 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1340 | if (nextbno != NULLFSBLOCK) | |
1341 | xfs_btree_reada_bufl(mp, nextbno, 1, | |
1342 | &xfs_bmbt_buf_ops); | |
1da177e4 | 1343 | /* |
9e5987a7 | 1344 | * Copy records into the extent records. |
1da177e4 | 1345 | */ |
9e5987a7 DC |
1346 | frp = XFS_BMBT_REC_ADDR(mp, block, 1); |
1347 | start = i; | |
1348 | for (j = 0; j < num_recs; j++, i++, frp++) { | |
1349 | xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i); | |
1350 | trp->l0 = be64_to_cpu(frp->l0); | |
1351 | trp->l1 = be64_to_cpu(frp->l1); | |
1da177e4 | 1352 | } |
9e5987a7 DC |
1353 | if (exntf == XFS_EXTFMT_NOSTATE) { |
1354 | /* | |
1355 | * Check all attribute bmap btree records and | |
1356 | * any "older" data bmap btree records for a | |
1357 | * set bit in the "extent flag" position. | |
1358 | */ | |
1359 | if (unlikely(xfs_check_nostate_extents(ifp, | |
1360 | start, num_recs))) { | |
1361 | XFS_ERROR_REPORT("xfs_bmap_read_extents(2)", | |
1362 | XFS_ERRLEVEL_LOW, | |
1363 | ip->i_mount); | |
1364 | goto error0; | |
1365 | } | |
1366 | } | |
1367 | xfs_trans_brelse(tp, bp); | |
1368 | bno = nextbno; | |
1da177e4 | 1369 | /* |
9e5987a7 | 1370 | * If we've reached the end, stop. |
1da177e4 | 1371 | */ |
9e5987a7 DC |
1372 | if (bno == NULLFSBLOCK) |
1373 | break; | |
1374 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
1375 | XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); | |
1376 | if (error) | |
1377 | return error; | |
1378 | block = XFS_BUF_TO_BLOCK(bp); | |
1da177e4 | 1379 | } |
5d829300 | 1380 | ASSERT(i == xfs_iext_count(ifp)); |
9e5987a7 DC |
1381 | ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork)); |
1382 | XFS_BMAP_TRACE_EXLIST(ip, i, whichfork); | |
1383 | return 0; | |
1384 | error0: | |
1385 | xfs_trans_brelse(tp, bp); | |
2451337d | 1386 | return -EFSCORRUPTED; |
9e5987a7 | 1387 | } |
a5bd606b | 1388 | |
9e5987a7 DC |
1389 | /* |
1390 | * Returns the file-relative block number of the first unused block(s) | |
1391 | * in the file with at least "len" logically contiguous blocks free. | |
1392 | * This is the lowest-address hole if the file has holes, else the first block | |
1393 | * past the end of file. | |
1394 | * Return 0 if the file is currently local (in-inode). | |
1395 | */ | |
1396 | int /* error */ | |
1397 | xfs_bmap_first_unused( | |
1398 | xfs_trans_t *tp, /* transaction pointer */ | |
1399 | xfs_inode_t *ip, /* incore inode */ | |
1400 | xfs_extlen_t len, /* size of hole to find */ | |
1401 | xfs_fileoff_t *first_unused, /* unused block */ | |
1402 | int whichfork) /* data or attr fork */ | |
1403 | { | |
1404 | int error; /* error return value */ | |
1405 | int idx; /* extent record index */ | |
1406 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1407 | xfs_fileoff_t lastaddr; /* last block number seen */ | |
1408 | xfs_fileoff_t lowest; /* lowest useful block */ | |
1409 | xfs_fileoff_t max; /* starting useful block */ | |
1410 | xfs_fileoff_t off; /* offset for this block */ | |
1411 | xfs_extnum_t nextents; /* number of extent entries */ | |
1412 | ||
1413 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE || | |
1414 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS || | |
1415 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
1416 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { | |
1417 | *first_unused = 0; | |
1418 | return 0; | |
dd9f438e | 1419 | } |
9e5987a7 DC |
1420 | ifp = XFS_IFORK_PTR(ip, whichfork); |
1421 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
1422 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
1423 | return error; | |
1424 | lowest = *first_unused; | |
5d829300 | 1425 | nextents = xfs_iext_count(ifp); |
9e5987a7 DC |
1426 | for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) { |
1427 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); | |
1428 | off = xfs_bmbt_get_startoff(ep); | |
1429 | /* | |
1430 | * See if the hole before this extent will work. | |
1431 | */ | |
1432 | if (off >= lowest + len && off - max >= len) { | |
1433 | *first_unused = max; | |
1434 | return 0; | |
1435 | } | |
1436 | lastaddr = off + xfs_bmbt_get_blockcount(ep); | |
1437 | max = XFS_FILEOFF_MAX(lastaddr, lowest); | |
dd9f438e | 1438 | } |
9e5987a7 DC |
1439 | *first_unused = max; |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | /* | |
02bb4873 | 1444 | * Returns the file-relative block number of the last block - 1 before |
9e5987a7 DC |
1445 | * last_block (input value) in the file. |
1446 | * This is not based on i_size, it is based on the extent records. | |
1447 | * Returns 0 for local files, as they do not have extent records. | |
1448 | */ | |
1449 | int /* error */ | |
1450 | xfs_bmap_last_before( | |
86685f7b CH |
1451 | struct xfs_trans *tp, /* transaction pointer */ |
1452 | struct xfs_inode *ip, /* incore inode */ | |
1453 | xfs_fileoff_t *last_block, /* last block */ | |
1454 | int whichfork) /* data or attr fork */ | |
9e5987a7 | 1455 | { |
86685f7b CH |
1456 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); |
1457 | struct xfs_bmbt_irec got; | |
1458 | xfs_extnum_t idx; | |
1459 | int error; | |
9e5987a7 | 1460 | |
86685f7b CH |
1461 | switch (XFS_IFORK_FORMAT(ip, whichfork)) { |
1462 | case XFS_DINODE_FMT_LOCAL: | |
9e5987a7 DC |
1463 | *last_block = 0; |
1464 | return 0; | |
86685f7b CH |
1465 | case XFS_DINODE_FMT_BTREE: |
1466 | case XFS_DINODE_FMT_EXTENTS: | |
1467 | break; | |
1468 | default: | |
1469 | return -EIO; | |
9e5987a7 | 1470 | } |
86685f7b CH |
1471 | |
1472 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1473 | error = xfs_iread_extents(tp, ip, whichfork); | |
1474 | if (error) | |
1475 | return error; | |
dd9f438e | 1476 | } |
86685f7b CH |
1477 | |
1478 | if (xfs_iext_lookup_extent(ip, ifp, *last_block - 1, &idx, &got)) { | |
1479 | if (got.br_startoff <= *last_block - 1) | |
1480 | return 0; | |
1481 | } | |
1482 | ||
1483 | if (xfs_iext_get_extent(ifp, idx - 1, &got)) { | |
1484 | *last_block = got.br_startoff + got.br_blockcount; | |
1485 | return 0; | |
1486 | } | |
1487 | ||
1488 | *last_block = 0; | |
9e5987a7 DC |
1489 | return 0; |
1490 | } | |
1491 | ||
68988114 | 1492 | int |
9e5987a7 DC |
1493 | xfs_bmap_last_extent( |
1494 | struct xfs_trans *tp, | |
1495 | struct xfs_inode *ip, | |
1496 | int whichfork, | |
1497 | struct xfs_bmbt_irec *rec, | |
1498 | int *is_empty) | |
1499 | { | |
1500 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
1501 | int error; | |
1502 | int nextents; | |
1503 | ||
1504 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1505 | error = xfs_iread_extents(tp, ip, whichfork); | |
1506 | if (error) | |
1507 | return error; | |
dd9f438e NS |
1508 | } |
1509 | ||
5d829300 | 1510 | nextents = xfs_iext_count(ifp); |
9e5987a7 DC |
1511 | if (nextents == 0) { |
1512 | *is_empty = 1; | |
1513 | return 0; | |
1514 | } | |
dd9f438e | 1515 | |
9e5987a7 DC |
1516 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, nextents - 1), rec); |
1517 | *is_empty = 0; | |
dd9f438e NS |
1518 | return 0; |
1519 | } | |
1520 | ||
9e5987a7 DC |
1521 | /* |
1522 | * Check the last inode extent to determine whether this allocation will result | |
1523 | * in blocks being allocated at the end of the file. When we allocate new data | |
1524 | * blocks at the end of the file which do not start at the previous data block, | |
1525 | * we will try to align the new blocks at stripe unit boundaries. | |
1526 | * | |
6e708bcf | 1527 | * Returns 1 in bma->aeof if the file (fork) is empty as any new write will be |
9e5987a7 DC |
1528 | * at, or past the EOF. |
1529 | */ | |
1530 | STATIC int | |
1531 | xfs_bmap_isaeof( | |
1532 | struct xfs_bmalloca *bma, | |
1533 | int whichfork) | |
1da177e4 | 1534 | { |
9e5987a7 DC |
1535 | struct xfs_bmbt_irec rec; |
1536 | int is_empty; | |
1537 | int error; | |
1da177e4 | 1538 | |
9e5987a7 DC |
1539 | bma->aeof = 0; |
1540 | error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec, | |
1541 | &is_empty); | |
6e708bcf | 1542 | if (error) |
9e5987a7 | 1543 | return error; |
1da177e4 | 1544 | |
6e708bcf DC |
1545 | if (is_empty) { |
1546 | bma->aeof = 1; | |
1547 | return 0; | |
1548 | } | |
1549 | ||
1da177e4 | 1550 | /* |
9e5987a7 DC |
1551 | * Check if we are allocation or past the last extent, or at least into |
1552 | * the last delayed allocated extent. | |
1da177e4 | 1553 | */ |
9e5987a7 DC |
1554 | bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount || |
1555 | (bma->offset >= rec.br_startoff && | |
1556 | isnullstartblock(rec.br_startblock)); | |
1557 | return 0; | |
1558 | } | |
1da177e4 | 1559 | |
9e5987a7 DC |
1560 | /* |
1561 | * Returns the file-relative block number of the first block past eof in | |
1562 | * the file. This is not based on i_size, it is based on the extent records. | |
1563 | * Returns 0 for local files, as they do not have extent records. | |
1564 | */ | |
1565 | int | |
1566 | xfs_bmap_last_offset( | |
9e5987a7 DC |
1567 | struct xfs_inode *ip, |
1568 | xfs_fileoff_t *last_block, | |
1569 | int whichfork) | |
1570 | { | |
1571 | struct xfs_bmbt_irec rec; | |
1572 | int is_empty; | |
1573 | int error; | |
04e99455 | 1574 | |
9e5987a7 | 1575 | *last_block = 0; |
0892ccd6 | 1576 | |
9e5987a7 DC |
1577 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) |
1578 | return 0; | |
a365bdd5 | 1579 | |
9e5987a7 DC |
1580 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && |
1581 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
2451337d | 1582 | return -EIO; |
a365bdd5 | 1583 | |
9e5987a7 DC |
1584 | error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty); |
1585 | if (error || is_empty) | |
a365bdd5 | 1586 | return error; |
9e5987a7 DC |
1587 | |
1588 | *last_block = rec.br_startoff + rec.br_blockcount; | |
a365bdd5 NS |
1589 | return 0; |
1590 | } | |
1591 | ||
9e5987a7 DC |
1592 | /* |
1593 | * Returns whether the selected fork of the inode has exactly one | |
1594 | * block or not. For the data fork we check this matches di_size, | |
1595 | * implying the file's range is 0..bsize-1. | |
1596 | */ | |
1597 | int /* 1=>1 block, 0=>otherwise */ | |
1598 | xfs_bmap_one_block( | |
1599 | xfs_inode_t *ip, /* incore inode */ | |
1600 | int whichfork) /* data or attr fork */ | |
c467c049 | 1601 | { |
9e5987a7 DC |
1602 | xfs_bmbt_rec_host_t *ep; /* ptr to fork's extent */ |
1603 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1604 | int rval; /* return value */ | |
1605 | xfs_bmbt_irec_t s; /* internal version of extent */ | |
c467c049 | 1606 | |
9e5987a7 DC |
1607 | #ifndef DEBUG |
1608 | if (whichfork == XFS_DATA_FORK) | |
1609 | return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize; | |
1610 | #endif /* !DEBUG */ | |
1611 | if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1) | |
1612 | return 0; | |
1613 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
1614 | return 0; | |
1615 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1616 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
1617 | ep = xfs_iext_get_ext(ifp, 0); | |
1618 | xfs_bmbt_get_all(ep, &s); | |
1619 | rval = s.br_startoff == 0 && s.br_blockcount == 1; | |
1620 | if (rval && whichfork == XFS_DATA_FORK) | |
1621 | ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize); | |
1622 | return rval; | |
1623 | } | |
c467c049 | 1624 | |
9e5987a7 DC |
1625 | /* |
1626 | * Extent tree manipulation functions used during allocation. | |
1627 | */ | |
c467c049 | 1628 | |
9e5987a7 DC |
1629 | /* |
1630 | * Convert a delayed allocation to a real allocation. | |
1631 | */ | |
1632 | STATIC int /* error */ | |
1633 | xfs_bmap_add_extent_delay_real( | |
60b4984f DW |
1634 | struct xfs_bmalloca *bma, |
1635 | int whichfork) | |
9e5987a7 DC |
1636 | { |
1637 | struct xfs_bmbt_irec *new = &bma->got; | |
1638 | int diff; /* temp value */ | |
1639 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ | |
1640 | int error; /* error return value */ | |
1641 | int i; /* temp state */ | |
1642 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1643 | xfs_fileoff_t new_endoff; /* end offset of new entry */ | |
1644 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
1645 | /* left is 0, right is 1, prev is 2 */ | |
1646 | int rval=0; /* return value (logging flags) */ | |
1647 | int state = 0;/* state bits, accessed thru macros */ | |
1648 | xfs_filblks_t da_new; /* new count del alloc blocks used */ | |
1649 | xfs_filblks_t da_old; /* old count del alloc blocks used */ | |
1650 | xfs_filblks_t temp=0; /* value for da_new calculations */ | |
1651 | xfs_filblks_t temp2=0;/* value for da_new calculations */ | |
1652 | int tmp_rval; /* partial logging flags */ | |
c29aad41 | 1653 | struct xfs_mount *mp; |
60b4984f | 1654 | xfs_extnum_t *nextents; |
c467c049 | 1655 | |
f1f96c49 | 1656 | mp = bma->ip->i_mount; |
6d3eb1ec | 1657 | ifp = XFS_IFORK_PTR(bma->ip, whichfork); |
60b4984f DW |
1658 | ASSERT(whichfork != XFS_ATTR_FORK); |
1659 | nextents = (whichfork == XFS_COW_FORK ? &bma->ip->i_cnextents : | |
1660 | &bma->ip->i_d.di_nextents); | |
c467c049 | 1661 | |
9e5987a7 | 1662 | ASSERT(bma->idx >= 0); |
5d829300 | 1663 | ASSERT(bma->idx <= xfs_iext_count(ifp)); |
9e5987a7 DC |
1664 | ASSERT(!isnullstartblock(new->br_startblock)); |
1665 | ASSERT(!bma->cur || | |
1666 | (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); | |
c467c049 | 1667 | |
ff6d6af2 | 1668 | XFS_STATS_INC(mp, xs_add_exlist); |
c467c049 | 1669 | |
9e5987a7 DC |
1670 | #define LEFT r[0] |
1671 | #define RIGHT r[1] | |
1672 | #define PREV r[2] | |
c467c049 | 1673 | |
60b4984f DW |
1674 | if (whichfork == XFS_COW_FORK) |
1675 | state |= BMAP_COWFORK; | |
1676 | ||
c467c049 | 1677 | /* |
9e5987a7 | 1678 | * Set up a bunch of variables to make the tests simpler. |
c467c049 | 1679 | */ |
9e5987a7 DC |
1680 | ep = xfs_iext_get_ext(ifp, bma->idx); |
1681 | xfs_bmbt_get_all(ep, &PREV); | |
1682 | new_endoff = new->br_startoff + new->br_blockcount; | |
1683 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
1684 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
1685 | ||
1686 | da_old = startblockval(PREV.br_startblock); | |
1687 | da_new = 0; | |
1688 | ||
c467c049 | 1689 | /* |
9e5987a7 DC |
1690 | * Set flags determining what part of the previous delayed allocation |
1691 | * extent is being replaced by a real allocation. | |
c467c049 | 1692 | */ |
9e5987a7 DC |
1693 | if (PREV.br_startoff == new->br_startoff) |
1694 | state |= BMAP_LEFT_FILLING; | |
1695 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
1696 | state |= BMAP_RIGHT_FILLING; | |
c467c049 CH |
1697 | |
1698 | /* | |
9e5987a7 DC |
1699 | * Check and set flags if this segment has a left neighbor. |
1700 | * Don't set contiguous if the combined extent would be too large. | |
c467c049 | 1701 | */ |
9e5987a7 DC |
1702 | if (bma->idx > 0) { |
1703 | state |= BMAP_LEFT_VALID; | |
1704 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &LEFT); | |
a99ebf43 | 1705 | |
9e5987a7 DC |
1706 | if (isnullstartblock(LEFT.br_startblock)) |
1707 | state |= BMAP_LEFT_DELAY; | |
a365bdd5 | 1708 | } |
a365bdd5 | 1709 | |
9e5987a7 DC |
1710 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && |
1711 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
1712 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
1713 | LEFT.br_state == new->br_state && | |
1714 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
1715 | state |= BMAP_LEFT_CONTIG; | |
a365bdd5 | 1716 | |
1da177e4 | 1717 | /* |
9e5987a7 DC |
1718 | * Check and set flags if this segment has a right neighbor. |
1719 | * Don't set contiguous if the combined extent would be too large. | |
1720 | * Also check for all-three-contiguous being too large. | |
1da177e4 | 1721 | */ |
5d829300 | 1722 | if (bma->idx < xfs_iext_count(ifp) - 1) { |
9e5987a7 DC |
1723 | state |= BMAP_RIGHT_VALID; |
1724 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx + 1), &RIGHT); | |
14b064ce | 1725 | |
9e5987a7 DC |
1726 | if (isnullstartblock(RIGHT.br_startblock)) |
1727 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 1728 | } |
9e5987a7 DC |
1729 | |
1730 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && | |
1731 | new_endoff == RIGHT.br_startoff && | |
1732 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
1733 | new->br_state == RIGHT.br_state && | |
1734 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
1735 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1736 | BMAP_RIGHT_FILLING)) != | |
1737 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1738 | BMAP_RIGHT_FILLING) || | |
1739 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
1740 | <= MAXEXTLEN)) | |
1741 | state |= BMAP_RIGHT_CONTIG; | |
1742 | ||
1743 | error = 0; | |
1da177e4 | 1744 | /* |
9e5987a7 | 1745 | * Switch out based on the FILLING and CONTIG state bits. |
1da177e4 | 1746 | */ |
9e5987a7 DC |
1747 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
1748 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
1749 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
1750 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
1da177e4 | 1751 | /* |
9e5987a7 DC |
1752 | * Filling in all of a previously delayed allocation extent. |
1753 | * The left and right neighbors are both contiguous with new. | |
1da177e4 | 1754 | */ |
9e5987a7 DC |
1755 | bma->idx--; |
1756 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1757 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
1758 | LEFT.br_blockcount + PREV.br_blockcount + | |
1759 | RIGHT.br_blockcount); | |
1760 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1761 | ||
1762 | xfs_iext_remove(bma->ip, bma->idx + 1, 2, state); | |
60b4984f | 1763 | (*nextents)--; |
9e5987a7 DC |
1764 | if (bma->cur == NULL) |
1765 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1766 | else { | |
1767 | rval = XFS_ILOG_CORE; | |
1768 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
1769 | RIGHT.br_startblock, | |
1770 | RIGHT.br_blockcount, &i); | |
1771 | if (error) | |
1772 | goto done; | |
c29aad41 | 1773 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1774 | error = xfs_btree_delete(bma->cur, &i); |
1775 | if (error) | |
1776 | goto done; | |
c29aad41 | 1777 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1778 | error = xfs_btree_decrement(bma->cur, 0, &i); |
1779 | if (error) | |
1780 | goto done; | |
c29aad41 | 1781 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1782 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, |
1783 | LEFT.br_startblock, | |
1784 | LEFT.br_blockcount + | |
1785 | PREV.br_blockcount + | |
1786 | RIGHT.br_blockcount, LEFT.br_state); | |
1787 | if (error) | |
1788 | goto done; | |
1789 | } | |
1790 | break; | |
1791 | ||
1792 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
a365bdd5 | 1793 | /* |
9e5987a7 DC |
1794 | * Filling in all of a previously delayed allocation extent. |
1795 | * The left neighbor is contiguous, the right is not. | |
a365bdd5 | 1796 | */ |
9e5987a7 DC |
1797 | bma->idx--; |
1798 | ||
1799 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1800 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
1801 | LEFT.br_blockcount + PREV.br_blockcount); | |
1802 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1803 | ||
1804 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); | |
1805 | if (bma->cur == NULL) | |
1806 | rval = XFS_ILOG_DEXT; | |
1807 | else { | |
1808 | rval = 0; | |
1809 | error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, | |
1810 | LEFT.br_startblock, LEFT.br_blockcount, | |
1811 | &i); | |
1812 | if (error) | |
1813 | goto done; | |
c29aad41 | 1814 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1815 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, |
1816 | LEFT.br_startblock, | |
1817 | LEFT.br_blockcount + | |
1818 | PREV.br_blockcount, LEFT.br_state); | |
1819 | if (error) | |
1820 | goto done; | |
1821 | } | |
1822 | break; | |
1823 | ||
1824 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
0937e0fd | 1825 | /* |
9e5987a7 DC |
1826 | * Filling in all of a previously delayed allocation extent. |
1827 | * The right neighbor is contiguous, the left is not. | |
0937e0fd | 1828 | */ |
9e5987a7 DC |
1829 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1830 | xfs_bmbt_set_startblock(ep, new->br_startblock); | |
1831 | xfs_bmbt_set_blockcount(ep, | |
1832 | PREV.br_blockcount + RIGHT.br_blockcount); | |
1833 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
0937e0fd | 1834 | |
9e5987a7 DC |
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, RIGHT.br_startoff, | |
1841 | RIGHT.br_startblock, | |
1842 | RIGHT.br_blockcount, &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, PREV.br_startoff, |
1847 | new->br_startblock, | |
1848 | PREV.br_blockcount + | |
1849 | RIGHT.br_blockcount, PREV.br_state); | |
1850 | if (error) | |
1851 | goto done; | |
1852 | } | |
1853 | break; | |
1854 | ||
1855 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: | |
a365bdd5 | 1856 | /* |
9e5987a7 DC |
1857 | * Filling in all of a previously delayed allocation extent. |
1858 | * Neither the left nor right neighbors are contiguous with | |
1859 | * the new one. | |
a365bdd5 | 1860 | */ |
9e5987a7 DC |
1861 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1862 | xfs_bmbt_set_startblock(ep, new->br_startblock); | |
1863 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
a365bdd5 | 1864 | |
60b4984f | 1865 | (*nextents)++; |
9e5987a7 DC |
1866 | if (bma->cur == NULL) |
1867 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1868 | else { | |
1869 | rval = XFS_ILOG_CORE; | |
1870 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
1871 | new->br_startblock, new->br_blockcount, | |
1872 | &i); | |
1873 | if (error) | |
1874 | goto done; | |
c29aad41 | 1875 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
1876 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
1877 | error = xfs_btree_insert(bma->cur, &i); | |
1878 | if (error) | |
1879 | goto done; | |
c29aad41 | 1880 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1881 | } |
1882 | break; | |
1da177e4 | 1883 | |
9e5987a7 | 1884 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
1da177e4 | 1885 | /* |
9e5987a7 DC |
1886 | * Filling in the first part of a previous delayed allocation. |
1887 | * The left neighbor is contiguous. | |
1da177e4 | 1888 | */ |
9e5987a7 DC |
1889 | trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_); |
1890 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx - 1), | |
1891 | LEFT.br_blockcount + new->br_blockcount); | |
1892 | xfs_bmbt_set_startoff(ep, | |
1893 | PREV.br_startoff + new->br_blockcount); | |
1894 | trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_); | |
1da177e4 | 1895 | |
9e5987a7 DC |
1896 | temp = PREV.br_blockcount - new->br_blockcount; |
1897 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1898 | xfs_bmbt_set_blockcount(ep, temp); | |
1899 | if (bma->cur == NULL) | |
1900 | rval = XFS_ILOG_DEXT; | |
1901 | else { | |
1902 | rval = 0; | |
1903 | error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, | |
1904 | LEFT.br_startblock, LEFT.br_blockcount, | |
1905 | &i); | |
1906 | if (error) | |
1907 | goto done; | |
c29aad41 | 1908 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1909 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, |
1910 | LEFT.br_startblock, | |
1911 | LEFT.br_blockcount + | |
1912 | new->br_blockcount, | |
1913 | LEFT.br_state); | |
f3ca8738 | 1914 | if (error) |
1da177e4 | 1915 | goto done; |
1da177e4 | 1916 | } |
9e5987a7 DC |
1917 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
1918 | startblockval(PREV.br_startblock)); | |
1919 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
1920 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1921 | ||
1922 | bma->idx--; | |
1923 | break; | |
1924 | ||
1925 | case BMAP_LEFT_FILLING: | |
1da177e4 | 1926 | /* |
9e5987a7 DC |
1927 | * Filling in the first part of a previous delayed allocation. |
1928 | * The left neighbor is not contiguous. | |
1da177e4 | 1929 | */ |
9e5987a7 DC |
1930 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1931 | xfs_bmbt_set_startoff(ep, new_endoff); | |
1932 | temp = PREV.br_blockcount - new->br_blockcount; | |
1933 | xfs_bmbt_set_blockcount(ep, temp); | |
1934 | xfs_iext_insert(bma->ip, bma->idx, 1, new, state); | |
60b4984f | 1935 | (*nextents)++; |
9e5987a7 DC |
1936 | if (bma->cur == NULL) |
1937 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1da177e4 | 1938 | else { |
9e5987a7 DC |
1939 | rval = XFS_ILOG_CORE; |
1940 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
1941 | new->br_startblock, new->br_blockcount, | |
1942 | &i); | |
1943 | if (error) | |
1944 | goto done; | |
c29aad41 | 1945 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
1946 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
1947 | error = xfs_btree_insert(bma->cur, &i); | |
1948 | if (error) | |
1da177e4 | 1949 | goto done; |
c29aad41 | 1950 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 1951 | } |
233eebb9 | 1952 | |
6d3eb1ec | 1953 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { |
9e5987a7 | 1954 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, |
2c3234d1 | 1955 | bma->firstblock, bma->dfops, |
6d3eb1ec | 1956 | &bma->cur, 1, &tmp_rval, whichfork); |
9e5987a7 DC |
1957 | rval |= tmp_rval; |
1958 | if (error) | |
1959 | goto done; | |
1da177e4 | 1960 | } |
9e5987a7 DC |
1961 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
1962 | startblockval(PREV.br_startblock) - | |
1963 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
1964 | ep = xfs_iext_get_ext(ifp, bma->idx + 1); | |
1965 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
1966 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
1da177e4 LT |
1967 | break; |
1968 | ||
9e5987a7 | 1969 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 | 1970 | /* |
9e5987a7 DC |
1971 | * Filling in the last part of a previous delayed allocation. |
1972 | * The right neighbor is contiguous with the new allocation. | |
1da177e4 | 1973 | */ |
9e5987a7 DC |
1974 | temp = PREV.br_blockcount - new->br_blockcount; |
1975 | trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
1da177e4 | 1976 | xfs_bmbt_set_blockcount(ep, temp); |
9e5987a7 DC |
1977 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx + 1), |
1978 | new->br_startoff, new->br_startblock, | |
1979 | new->br_blockcount + RIGHT.br_blockcount, | |
1980 | RIGHT.br_state); | |
1981 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
1982 | if (bma->cur == NULL) | |
1983 | rval = XFS_ILOG_DEXT; | |
1984 | else { | |
1985 | rval = 0; | |
1986 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
1987 | RIGHT.br_startblock, | |
1988 | RIGHT.br_blockcount, &i); | |
1989 | if (error) | |
1990 | goto done; | |
c29aad41 | 1991 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1992 | error = xfs_bmbt_update(bma->cur, new->br_startoff, |
1993 | new->br_startblock, | |
1994 | new->br_blockcount + | |
1995 | RIGHT.br_blockcount, | |
1996 | RIGHT.br_state); | |
1997 | if (error) | |
1998 | goto done; | |
1da177e4 | 1999 | } |
9e5987a7 DC |
2000 | |
2001 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), | |
2002 | startblockval(PREV.br_startblock)); | |
2003 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2004 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2005 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2006 | ||
2007 | bma->idx++; | |
1da177e4 LT |
2008 | break; |
2009 | ||
9e5987a7 | 2010 | case BMAP_RIGHT_FILLING: |
1da177e4 | 2011 | /* |
9e5987a7 DC |
2012 | * Filling in the last part of a previous delayed allocation. |
2013 | * The right neighbor is not contiguous. | |
1da177e4 | 2014 | */ |
9e5987a7 DC |
2015 | temp = PREV.br_blockcount - new->br_blockcount; |
2016 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1da177e4 | 2017 | xfs_bmbt_set_blockcount(ep, temp); |
9e5987a7 | 2018 | xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state); |
60b4984f | 2019 | (*nextents)++; |
9e5987a7 DC |
2020 | if (bma->cur == NULL) |
2021 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2022 | else { | |
2023 | rval = XFS_ILOG_CORE; | |
2024 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2025 | new->br_startblock, new->br_blockcount, | |
2026 | &i); | |
2027 | if (error) | |
2028 | goto done; | |
c29aad41 | 2029 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2030 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2031 | error = xfs_btree_insert(bma->cur, &i); | |
2032 | if (error) | |
2033 | goto done; | |
c29aad41 | 2034 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 2035 | } |
9e5987a7 | 2036 | |
6d3eb1ec | 2037 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { |
9e5987a7 | 2038 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, |
2c3234d1 | 2039 | bma->firstblock, bma->dfops, &bma->cur, 1, |
6d3eb1ec | 2040 | &tmp_rval, whichfork); |
9e5987a7 DC |
2041 | rval |= tmp_rval; |
2042 | if (error) | |
2043 | goto done; | |
1da177e4 | 2044 | } |
9e5987a7 DC |
2045 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
2046 | startblockval(PREV.br_startblock) - | |
2047 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2048 | ep = xfs_iext_get_ext(ifp, bma->idx); | |
2049 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2050 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2051 | ||
2052 | bma->idx++; | |
1da177e4 LT |
2053 | break; |
2054 | ||
2055 | case 0: | |
2056 | /* | |
9e5987a7 DC |
2057 | * Filling in the middle part of a previous delayed allocation. |
2058 | * Contiguity is impossible here. | |
2059 | * This case is avoided almost all the time. | |
2060 | * | |
2061 | * We start with a delayed allocation: | |
2062 | * | |
2063 | * +ddddddddddddddddddddddddddddddddddddddddddddddddddddddd+ | |
2064 | * PREV @ idx | |
2065 | * | |
2066 | * and we are allocating: | |
2067 | * +rrrrrrrrrrrrrrrrr+ | |
2068 | * new | |
2069 | * | |
2070 | * and we set it up for insertion as: | |
2071 | * +ddddddddddddddddddd+rrrrrrrrrrrrrrrrr+ddddddddddddddddd+ | |
2072 | * new | |
2073 | * PREV @ idx LEFT RIGHT | |
2074 | * inserted at idx + 1 | |
1da177e4 | 2075 | */ |
9e5987a7 DC |
2076 | temp = new->br_startoff - PREV.br_startoff; |
2077 | temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
2078 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_); | |
2079 | xfs_bmbt_set_blockcount(ep, temp); /* truncate PREV */ | |
2080 | LEFT = *new; | |
2081 | RIGHT.br_state = PREV.br_state; | |
2082 | RIGHT.br_startblock = nullstartblock( | |
2083 | (int)xfs_bmap_worst_indlen(bma->ip, temp2)); | |
2084 | RIGHT.br_startoff = new_endoff; | |
2085 | RIGHT.br_blockcount = temp2; | |
2086 | /* insert LEFT (r[0]) and RIGHT (r[1]) at the same time */ | |
2087 | xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state); | |
60b4984f | 2088 | (*nextents)++; |
9e5987a7 DC |
2089 | if (bma->cur == NULL) |
2090 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2091 | else { | |
2092 | rval = XFS_ILOG_CORE; | |
2093 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2094 | new->br_startblock, new->br_blockcount, | |
2095 | &i); | |
2096 | if (error) | |
2097 | goto done; | |
c29aad41 | 2098 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2099 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2100 | error = xfs_btree_insert(bma->cur, &i); | |
2101 | if (error) | |
2102 | goto done; | |
c29aad41 | 2103 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 2104 | } |
1da177e4 | 2105 | |
6d3eb1ec | 2106 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { |
9e5987a7 | 2107 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, |
2c3234d1 | 2108 | bma->firstblock, bma->dfops, &bma->cur, |
6d3eb1ec | 2109 | 1, &tmp_rval, whichfork); |
9e5987a7 DC |
2110 | rval |= tmp_rval; |
2111 | if (error) | |
2112 | goto done; | |
2113 | } | |
2114 | temp = xfs_bmap_worst_indlen(bma->ip, temp); | |
2115 | temp2 = xfs_bmap_worst_indlen(bma->ip, temp2); | |
2116 | diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) - | |
2117 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2118 | if (diff > 0) { | |
0d485ada DC |
2119 | error = xfs_mod_fdblocks(bma->ip->i_mount, |
2120 | -((int64_t)diff), false); | |
9e5987a7 DC |
2121 | ASSERT(!error); |
2122 | if (error) | |
2123 | goto done; | |
2124 | } | |
2125 | ||
2126 | ep = xfs_iext_get_ext(ifp, bma->idx); | |
2127 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
2128 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2129 | trace_xfs_bmap_pre_update(bma->ip, bma->idx + 2, state, _THIS_IP_); | |
2130 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, bma->idx + 2), | |
2131 | nullstartblock((int)temp2)); | |
2132 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 2, state, _THIS_IP_); | |
2133 | ||
2134 | bma->idx++; | |
2135 | da_new = temp + temp2; | |
2136 | break; | |
2137 | ||
2138 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2139 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2140 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
2141 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
2142 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2143 | case BMAP_LEFT_CONTIG: | |
2144 | case BMAP_RIGHT_CONTIG: | |
2145 | /* | |
2146 | * These cases are all impossible. | |
2147 | */ | |
2148 | ASSERT(0); | |
2149 | } | |
2150 | ||
9c194644 DW |
2151 | /* add reverse mapping */ |
2152 | error = xfs_rmap_map_extent(mp, bma->dfops, bma->ip, whichfork, new); | |
2153 | if (error) | |
2154 | goto done; | |
2155 | ||
9e5987a7 | 2156 | /* convert to a btree if necessary */ |
6d3eb1ec | 2157 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { |
9e5987a7 DC |
2158 | int tmp_logflags; /* partial log flag return val */ |
2159 | ||
2160 | ASSERT(bma->cur == NULL); | |
2161 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2c3234d1 | 2162 | bma->firstblock, bma->dfops, &bma->cur, |
6d3eb1ec | 2163 | da_old > 0, &tmp_logflags, whichfork); |
9e5987a7 DC |
2164 | bma->logflags |= tmp_logflags; |
2165 | if (error) | |
2166 | goto done; | |
2167 | } | |
2168 | ||
2169 | /* adjust for changes in reserved delayed indirect blocks */ | |
2170 | if (da_old || da_new) { | |
2171 | temp = da_new; | |
2172 | if (bma->cur) | |
2173 | temp += bma->cur->bc_private.b.allocated; | |
2174 | ASSERT(temp <= da_old); | |
2175 | if (temp < da_old) | |
0d485ada DC |
2176 | xfs_mod_fdblocks(bma->ip->i_mount, |
2177 | (int64_t)(da_old - temp), false); | |
96540c78 | 2178 | } |
9e5987a7 DC |
2179 | |
2180 | /* clear out the allocated field, done with it now in any case. */ | |
2181 | if (bma->cur) | |
2182 | bma->cur->bc_private.b.allocated = 0; | |
2183 | ||
6d3eb1ec | 2184 | xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); |
1da177e4 | 2185 | done: |
60b4984f DW |
2186 | if (whichfork != XFS_COW_FORK) |
2187 | bma->logflags |= rval; | |
1da177e4 | 2188 | return error; |
9e5987a7 DC |
2189 | #undef LEFT |
2190 | #undef RIGHT | |
2191 | #undef PREV | |
1da177e4 LT |
2192 | } |
2193 | ||
2194 | /* | |
9e5987a7 | 2195 | * Convert an unwritten allocation to a real allocation or vice versa. |
1da177e4 | 2196 | */ |
9e5987a7 DC |
2197 | STATIC int /* error */ |
2198 | xfs_bmap_add_extent_unwritten_real( | |
2199 | struct xfs_trans *tp, | |
2200 | xfs_inode_t *ip, /* incore inode pointer */ | |
2201 | xfs_extnum_t *idx, /* extent number to update/insert */ | |
2202 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
2203 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ | |
2204 | xfs_fsblock_t *first, /* pointer to firstblock variable */ | |
2c3234d1 | 2205 | struct xfs_defer_ops *dfops, /* list of extents to be freed */ |
9e5987a7 | 2206 | int *logflagsp) /* inode logging flags */ |
1da177e4 | 2207 | { |
9e5987a7 DC |
2208 | xfs_btree_cur_t *cur; /* btree cursor */ |
2209 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ | |
2210 | int error; /* error return value */ | |
2211 | int i; /* temp state */ | |
2212 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
2213 | xfs_fileoff_t new_endoff; /* end offset of new entry */ | |
2214 | xfs_exntst_t newext; /* new extent state */ | |
2215 | xfs_exntst_t oldext; /* old extent state */ | |
2216 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
2217 | /* left is 0, right is 1, prev is 2 */ | |
2218 | int rval=0; /* return value (logging flags) */ | |
2219 | int state = 0;/* state bits, accessed thru macros */ | |
c29aad41 | 2220 | struct xfs_mount *mp = tp->t_mountp; |
1da177e4 | 2221 | |
9e5987a7 | 2222 | *logflagsp = 0; |
1da177e4 | 2223 | |
9e5987a7 DC |
2224 | cur = *curp; |
2225 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
8096b1eb | 2226 | |
9e5987a7 | 2227 | ASSERT(*idx >= 0); |
5d829300 | 2228 | ASSERT(*idx <= xfs_iext_count(ifp)); |
9e5987a7 DC |
2229 | ASSERT(!isnullstartblock(new->br_startblock)); |
2230 | ||
ff6d6af2 | 2231 | XFS_STATS_INC(mp, xs_add_exlist); |
9e5987a7 DC |
2232 | |
2233 | #define LEFT r[0] | |
2234 | #define RIGHT r[1] | |
2235 | #define PREV r[2] | |
7cc95a82 | 2236 | |
1da177e4 | 2237 | /* |
9e5987a7 | 2238 | * Set up a bunch of variables to make the tests simpler. |
1da177e4 | 2239 | */ |
9e5987a7 DC |
2240 | error = 0; |
2241 | ep = xfs_iext_get_ext(ifp, *idx); | |
2242 | xfs_bmbt_get_all(ep, &PREV); | |
2243 | newext = new->br_state; | |
2244 | oldext = (newext == XFS_EXT_UNWRITTEN) ? | |
2245 | XFS_EXT_NORM : XFS_EXT_UNWRITTEN; | |
2246 | ASSERT(PREV.br_state == oldext); | |
2247 | new_endoff = new->br_startoff + new->br_blockcount; | |
2248 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
2249 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
7cc95a82 | 2250 | |
1da177e4 | 2251 | /* |
9e5987a7 DC |
2252 | * Set flags determining what part of the previous oldext allocation |
2253 | * extent is being replaced by a newext allocation. | |
1da177e4 | 2254 | */ |
9e5987a7 DC |
2255 | if (PREV.br_startoff == new->br_startoff) |
2256 | state |= BMAP_LEFT_FILLING; | |
2257 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
2258 | state |= BMAP_RIGHT_FILLING; | |
2259 | ||
1da177e4 | 2260 | /* |
9e5987a7 DC |
2261 | * Check and set flags if this segment has a left neighbor. |
2262 | * Don't set contiguous if the combined extent would be too large. | |
1da177e4 | 2263 | */ |
9e5987a7 DC |
2264 | if (*idx > 0) { |
2265 | state |= BMAP_LEFT_VALID; | |
2266 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &LEFT); | |
2267 | ||
2268 | if (isnullstartblock(LEFT.br_startblock)) | |
2269 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 2270 | } |
9e5987a7 DC |
2271 | |
2272 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
2273 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
2274 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
2275 | LEFT.br_state == newext && | |
2276 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2277 | state |= BMAP_LEFT_CONTIG; | |
2278 | ||
1da177e4 | 2279 | /* |
9e5987a7 DC |
2280 | * Check and set flags if this segment has a right neighbor. |
2281 | * Don't set contiguous if the combined extent would be too large. | |
2282 | * Also check for all-three-contiguous being too large. | |
1da177e4 | 2283 | */ |
5d829300 | 2284 | if (*idx < xfs_iext_count(&ip->i_df) - 1) { |
9e5987a7 DC |
2285 | state |= BMAP_RIGHT_VALID; |
2286 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx + 1), &RIGHT); | |
2287 | if (isnullstartblock(RIGHT.br_startblock)) | |
2288 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 2289 | } |
7cc95a82 | 2290 | |
9e5987a7 DC |
2291 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && |
2292 | new_endoff == RIGHT.br_startoff && | |
2293 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
2294 | newext == RIGHT.br_state && | |
2295 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
2296 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
2297 | BMAP_RIGHT_FILLING)) != | |
2298 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
2299 | BMAP_RIGHT_FILLING) || | |
2300 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
2301 | <= MAXEXTLEN)) | |
2302 | state |= BMAP_RIGHT_CONTIG; | |
136341b4 | 2303 | |
1da177e4 | 2304 | /* |
9e5987a7 | 2305 | * Switch out based on the FILLING and CONTIG state bits. |
1da177e4 | 2306 | */ |
9e5987a7 DC |
2307 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
2308 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
2309 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
2310 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
2311 | /* | |
2312 | * Setting all of a previous oldext extent to newext. | |
2313 | * The left and right neighbors are both contiguous with new. | |
2314 | */ | |
2315 | --*idx; | |
1a5902c5 | 2316 | |
9e5987a7 DC |
2317 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2318 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), | |
2319 | LEFT.br_blockcount + PREV.br_blockcount + | |
2320 | RIGHT.br_blockcount); | |
2321 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1a5902c5 | 2322 | |
9e5987a7 DC |
2323 | xfs_iext_remove(ip, *idx + 1, 2, state); |
2324 | ip->i_d.di_nextents -= 2; | |
2325 | if (cur == NULL) | |
2326 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2327 | else { | |
2328 | rval = XFS_ILOG_CORE; | |
2329 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
2330 | RIGHT.br_startblock, | |
2331 | RIGHT.br_blockcount, &i))) | |
2332 | goto done; | |
c29aad41 | 2333 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2334 | if ((error = xfs_btree_delete(cur, &i))) |
2335 | goto done; | |
c29aad41 | 2336 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2337 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2338 | goto done; | |
c29aad41 | 2339 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2340 | if ((error = xfs_btree_delete(cur, &i))) |
2341 | goto done; | |
c29aad41 | 2342 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2343 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2344 | goto done; | |
c29aad41 | 2345 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2346 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
2347 | LEFT.br_startblock, | |
2348 | LEFT.br_blockcount + PREV.br_blockcount + | |
2349 | RIGHT.br_blockcount, LEFT.br_state))) | |
2350 | goto done; | |
2351 | } | |
2352 | break; | |
1a5902c5 | 2353 | |
9e5987a7 DC |
2354 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: |
2355 | /* | |
2356 | * Setting all of a previous oldext extent to newext. | |
2357 | * The left neighbor is contiguous, the right is not. | |
2358 | */ | |
2359 | --*idx; | |
d8cc890d | 2360 | |
9e5987a7 DC |
2361 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2362 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), | |
2363 | LEFT.br_blockcount + PREV.br_blockcount); | |
2364 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2365 | |
9e5987a7 DC |
2366 | xfs_iext_remove(ip, *idx + 1, 1, state); |
2367 | ip->i_d.di_nextents--; | |
2368 | if (cur == NULL) | |
2369 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2370 | else { | |
2371 | rval = XFS_ILOG_CORE; | |
2372 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2373 | PREV.br_startblock, PREV.br_blockcount, | |
2374 | &i))) | |
2375 | goto done; | |
c29aad41 | 2376 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2377 | if ((error = xfs_btree_delete(cur, &i))) |
2378 | goto done; | |
c29aad41 | 2379 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2380 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2381 | goto done; | |
c29aad41 | 2382 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2383 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
2384 | LEFT.br_startblock, | |
2385 | LEFT.br_blockcount + PREV.br_blockcount, | |
2386 | LEFT.br_state))) | |
2387 | goto done; | |
2388 | } | |
2389 | break; | |
1da177e4 | 2390 | |
9e5987a7 | 2391 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 | 2392 | /* |
9e5987a7 DC |
2393 | * Setting all of a previous oldext extent to newext. |
2394 | * The right neighbor is contiguous, the left is not. | |
1da177e4 | 2395 | */ |
9e5987a7 DC |
2396 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2397 | xfs_bmbt_set_blockcount(ep, | |
2398 | PREV.br_blockcount + RIGHT.br_blockcount); | |
2399 | xfs_bmbt_set_state(ep, newext); | |
2400 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2401 | xfs_iext_remove(ip, *idx + 1, 1, state); | |
2402 | ip->i_d.di_nextents--; | |
2403 | if (cur == NULL) | |
2404 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2405 | else { | |
2406 | rval = XFS_ILOG_CORE; | |
2407 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
2408 | RIGHT.br_startblock, | |
2409 | RIGHT.br_blockcount, &i))) | |
2410 | goto done; | |
c29aad41 | 2411 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2412 | if ((error = xfs_btree_delete(cur, &i))) |
2413 | goto done; | |
c29aad41 | 2414 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2415 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2416 | goto done; | |
c29aad41 | 2417 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2418 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
2419 | new->br_startblock, | |
2420 | new->br_blockcount + RIGHT.br_blockcount, | |
2421 | newext))) | |
2422 | goto done; | |
1da177e4 | 2423 | } |
9e5987a7 | 2424 | break; |
1e82379b | 2425 | |
9e5987a7 DC |
2426 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: |
2427 | /* | |
2428 | * Setting all of a previous oldext extent to newext. | |
2429 | * Neither the left nor right neighbors are contiguous with | |
2430 | * the new one. | |
2431 | */ | |
2432 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2433 | xfs_bmbt_set_state(ep, newext); | |
2434 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1e82379b | 2435 | |
9e5987a7 DC |
2436 | if (cur == NULL) |
2437 | rval = XFS_ILOG_DEXT; | |
2438 | else { | |
2439 | rval = 0; | |
2440 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2441 | new->br_startblock, new->br_blockcount, | |
2442 | &i))) | |
2443 | goto done; | |
c29aad41 | 2444 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2445 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
2446 | new->br_startblock, new->br_blockcount, | |
2447 | newext))) | |
2448 | goto done; | |
2449 | } | |
2450 | break; | |
1e82379b | 2451 | |
9e5987a7 DC |
2452 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
2453 | /* | |
2454 | * Setting the first part of a previous oldext extent to newext. | |
2455 | * The left neighbor is contiguous. | |
2456 | */ | |
2457 | trace_xfs_bmap_pre_update(ip, *idx - 1, state, _THIS_IP_); | |
2458 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx - 1), | |
2459 | LEFT.br_blockcount + new->br_blockcount); | |
2460 | xfs_bmbt_set_startoff(ep, | |
2461 | PREV.br_startoff + new->br_blockcount); | |
2462 | trace_xfs_bmap_post_update(ip, *idx - 1, state, _THIS_IP_); | |
1da177e4 | 2463 | |
9e5987a7 DC |
2464 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2465 | xfs_bmbt_set_startblock(ep, | |
2466 | new->br_startblock + new->br_blockcount); | |
2467 | xfs_bmbt_set_blockcount(ep, | |
2468 | PREV.br_blockcount - new->br_blockcount); | |
2469 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
0293ce3a | 2470 | |
9e5987a7 | 2471 | --*idx; |
8867bc9b | 2472 | |
9e5987a7 DC |
2473 | if (cur == NULL) |
2474 | rval = XFS_ILOG_DEXT; | |
2475 | else { | |
2476 | rval = 0; | |
2477 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2478 | PREV.br_startblock, PREV.br_blockcount, | |
2479 | &i))) | |
2480 | goto done; | |
c29aad41 | 2481 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2482 | if ((error = xfs_bmbt_update(cur, |
2483 | PREV.br_startoff + new->br_blockcount, | |
2484 | PREV.br_startblock + new->br_blockcount, | |
2485 | PREV.br_blockcount - new->br_blockcount, | |
2486 | oldext))) | |
2487 | goto done; | |
2488 | if ((error = xfs_btree_decrement(cur, 0, &i))) | |
2489 | goto done; | |
2490 | error = xfs_bmbt_update(cur, LEFT.br_startoff, | |
2491 | LEFT.br_startblock, | |
2492 | LEFT.br_blockcount + new->br_blockcount, | |
2493 | LEFT.br_state); | |
2494 | if (error) | |
2495 | goto done; | |
8867bc9b | 2496 | } |
9e5987a7 | 2497 | break; |
0293ce3a | 2498 | |
9e5987a7 DC |
2499 | case BMAP_LEFT_FILLING: |
2500 | /* | |
2501 | * Setting the first part of a previous oldext extent to newext. | |
2502 | * The left neighbor is not contiguous. | |
2503 | */ | |
2504 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2505 | ASSERT(ep && xfs_bmbt_get_state(ep) == oldext); | |
2506 | xfs_bmbt_set_startoff(ep, new_endoff); | |
2507 | xfs_bmbt_set_blockcount(ep, | |
2508 | PREV.br_blockcount - new->br_blockcount); | |
2509 | xfs_bmbt_set_startblock(ep, | |
2510 | new->br_startblock + new->br_blockcount); | |
2511 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2512 | |
9e5987a7 DC |
2513 | xfs_iext_insert(ip, *idx, 1, new, state); |
2514 | ip->i_d.di_nextents++; | |
2515 | if (cur == NULL) | |
2516 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2517 | else { | |
2518 | rval = XFS_ILOG_CORE; | |
2519 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2520 | PREV.br_startblock, PREV.br_blockcount, | |
2521 | &i))) | |
2522 | goto done; | |
c29aad41 | 2523 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2524 | if ((error = xfs_bmbt_update(cur, |
2525 | PREV.br_startoff + new->br_blockcount, | |
2526 | PREV.br_startblock + new->br_blockcount, | |
2527 | PREV.br_blockcount - new->br_blockcount, | |
2528 | oldext))) | |
2529 | goto done; | |
2530 | cur->bc_rec.b = *new; | |
2531 | if ((error = xfs_btree_insert(cur, &i))) | |
2532 | goto done; | |
c29aad41 | 2533 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2534 | } |
2535 | break; | |
1da177e4 | 2536 | |
9e5987a7 DC |
2537 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
2538 | /* | |
2539 | * Setting the last part of a previous oldext extent to newext. | |
2540 | * The right neighbor is contiguous with the new allocation. | |
2541 | */ | |
2542 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2543 | xfs_bmbt_set_blockcount(ep, | |
2544 | PREV.br_blockcount - new->br_blockcount); | |
2545 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
0293ce3a | 2546 | |
9e5987a7 | 2547 | ++*idx; |
1da177e4 | 2548 | |
9e5987a7 DC |
2549 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2550 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), | |
2551 | new->br_startoff, new->br_startblock, | |
2552 | new->br_blockcount + RIGHT.br_blockcount, newext); | |
2553 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2554 | |
9e5987a7 DC |
2555 | if (cur == NULL) |
2556 | rval = XFS_ILOG_DEXT; | |
2557 | else { | |
2558 | rval = 0; | |
2559 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2560 | PREV.br_startblock, | |
2561 | PREV.br_blockcount, &i))) | |
2562 | goto done; | |
c29aad41 | 2563 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2564 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
2565 | PREV.br_startblock, | |
2566 | PREV.br_blockcount - new->br_blockcount, | |
2567 | oldext))) | |
2568 | goto done; | |
2569 | if ((error = xfs_btree_increment(cur, 0, &i))) | |
2570 | goto done; | |
2571 | if ((error = xfs_bmbt_update(cur, new->br_startoff, | |
2572 | new->br_startblock, | |
2573 | new->br_blockcount + RIGHT.br_blockcount, | |
2574 | newext))) | |
2575 | goto done; | |
2576 | } | |
2577 | break; | |
1da177e4 | 2578 | |
9e5987a7 DC |
2579 | case BMAP_RIGHT_FILLING: |
2580 | /* | |
2581 | * Setting the last part of a previous oldext extent to newext. | |
2582 | * The right neighbor is not contiguous. | |
2583 | */ | |
2584 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2585 | xfs_bmbt_set_blockcount(ep, | |
2586 | PREV.br_blockcount - new->br_blockcount); | |
2587 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2588 | |
9e5987a7 DC |
2589 | ++*idx; |
2590 | xfs_iext_insert(ip, *idx, 1, new, state); | |
d8cc890d | 2591 | |
9e5987a7 DC |
2592 | ip->i_d.di_nextents++; |
2593 | if (cur == NULL) | |
2594 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2595 | else { | |
2596 | rval = XFS_ILOG_CORE; | |
2597 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2598 | PREV.br_startblock, PREV.br_blockcount, | |
2599 | &i))) | |
2600 | goto done; | |
c29aad41 | 2601 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2602 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
2603 | PREV.br_startblock, | |
2604 | PREV.br_blockcount - new->br_blockcount, | |
2605 | oldext))) | |
2606 | goto done; | |
2607 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2608 | new->br_startblock, new->br_blockcount, | |
2609 | &i))) | |
2610 | goto done; | |
c29aad41 | 2611 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2612 | cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2613 | if ((error = xfs_btree_insert(cur, &i))) | |
2614 | goto done; | |
c29aad41 | 2615 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2616 | } |
2617 | break; | |
2618 | ||
2619 | case 0: | |
1da177e4 | 2620 | /* |
9e5987a7 DC |
2621 | * Setting the middle part of a previous oldext extent to |
2622 | * newext. Contiguity is impossible here. | |
2623 | * One extent becomes three extents. | |
1da177e4 | 2624 | */ |
9e5987a7 DC |
2625 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2626 | xfs_bmbt_set_blockcount(ep, | |
2627 | new->br_startoff - PREV.br_startoff); | |
2628 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
898621d5 | 2629 | |
9e5987a7 DC |
2630 | r[0] = *new; |
2631 | r[1].br_startoff = new_endoff; | |
2632 | r[1].br_blockcount = | |
2633 | PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
2634 | r[1].br_startblock = new->br_startblock + new->br_blockcount; | |
2635 | r[1].br_state = oldext; | |
898621d5 | 2636 | |
9e5987a7 DC |
2637 | ++*idx; |
2638 | xfs_iext_insert(ip, *idx, 2, &r[0], state); | |
2639 | ||
2640 | ip->i_d.di_nextents += 2; | |
2641 | if (cur == NULL) | |
2642 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2643 | else { | |
2644 | rval = XFS_ILOG_CORE; | |
2645 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2646 | PREV.br_startblock, PREV.br_blockcount, | |
2647 | &i))) | |
2648 | goto done; | |
c29aad41 | 2649 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2650 | /* new right extent - oldext */ |
2651 | if ((error = xfs_bmbt_update(cur, r[1].br_startoff, | |
2652 | r[1].br_startblock, r[1].br_blockcount, | |
2653 | r[1].br_state))) | |
2654 | goto done; | |
2655 | /* new left extent - oldext */ | |
2656 | cur->bc_rec.b = PREV; | |
2657 | cur->bc_rec.b.br_blockcount = | |
2658 | new->br_startoff - PREV.br_startoff; | |
2659 | if ((error = xfs_btree_insert(cur, &i))) | |
2660 | goto done; | |
c29aad41 | 2661 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2662 | /* |
2663 | * Reset the cursor to the position of the new extent | |
2664 | * we are about to insert as we can't trust it after | |
2665 | * the previous insert. | |
2666 | */ | |
2667 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2668 | new->br_startblock, new->br_blockcount, | |
2669 | &i))) | |
2670 | goto done; | |
c29aad41 | 2671 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2672 | /* new middle extent - newext */ |
2673 | cur->bc_rec.b.br_state = new->br_state; | |
2674 | if ((error = xfs_btree_insert(cur, &i))) | |
2675 | goto done; | |
c29aad41 | 2676 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 | 2677 | } |
1da177e4 | 2678 | break; |
9e5987a7 DC |
2679 | |
2680 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2681 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2682 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
2683 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
2684 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2685 | case BMAP_LEFT_CONTIG: | |
2686 | case BMAP_RIGHT_CONTIG: | |
2687 | /* | |
2688 | * These cases are all impossible. | |
2689 | */ | |
1da177e4 | 2690 | ASSERT(0); |
1da177e4 | 2691 | } |
8096b1eb | 2692 | |
9c194644 DW |
2693 | /* update reverse mappings */ |
2694 | error = xfs_rmap_convert_extent(mp, dfops, ip, XFS_DATA_FORK, new); | |
2695 | if (error) | |
2696 | goto done; | |
2697 | ||
9e5987a7 DC |
2698 | /* convert to a btree if necessary */ |
2699 | if (xfs_bmap_needs_btree(ip, XFS_DATA_FORK)) { | |
2700 | int tmp_logflags; /* partial log flag return val */ | |
2701 | ||
2702 | ASSERT(cur == NULL); | |
2c3234d1 | 2703 | error = xfs_bmap_extents_to_btree(tp, ip, first, dfops, &cur, |
9e5987a7 DC |
2704 | 0, &tmp_logflags, XFS_DATA_FORK); |
2705 | *logflagsp |= tmp_logflags; | |
2706 | if (error) | |
2707 | goto done; | |
1da177e4 | 2708 | } |
da087bad | 2709 | |
9e5987a7 DC |
2710 | /* clear out the allocated field, done with it now in any case. */ |
2711 | if (cur) { | |
2712 | cur->bc_private.b.allocated = 0; | |
2713 | *curp = cur; | |
1da177e4 | 2714 | } |
8096b1eb | 2715 | |
9e5987a7 DC |
2716 | xfs_bmap_check_leaf_extents(*curp, ip, XFS_DATA_FORK); |
2717 | done: | |
2718 | *logflagsp |= rval; | |
1da177e4 | 2719 | return error; |
9e5987a7 DC |
2720 | #undef LEFT |
2721 | #undef RIGHT | |
2722 | #undef PREV | |
1da177e4 LT |
2723 | } |
2724 | ||
2725 | /* | |
9e5987a7 | 2726 | * Convert a hole to a delayed allocation. |
1da177e4 | 2727 | */ |
9e5987a7 DC |
2728 | STATIC void |
2729 | xfs_bmap_add_extent_hole_delay( | |
2730 | xfs_inode_t *ip, /* incore inode pointer */ | |
be51f811 | 2731 | int whichfork, |
9e5987a7 DC |
2732 | xfs_extnum_t *idx, /* extent number to update/insert */ |
2733 | xfs_bmbt_irec_t *new) /* new data to add to file extents */ | |
1da177e4 | 2734 | { |
9e5987a7 DC |
2735 | xfs_ifork_t *ifp; /* inode fork pointer */ |
2736 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ | |
2737 | xfs_filblks_t newlen=0; /* new indirect size */ | |
2738 | xfs_filblks_t oldlen=0; /* old indirect size */ | |
2739 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
2740 | int state; /* state bits, accessed thru macros */ | |
2741 | xfs_filblks_t temp=0; /* temp for indirect calculations */ | |
1da177e4 | 2742 | |
be51f811 | 2743 | ifp = XFS_IFORK_PTR(ip, whichfork); |
9e5987a7 | 2744 | state = 0; |
be51f811 DW |
2745 | if (whichfork == XFS_COW_FORK) |
2746 | state |= BMAP_COWFORK; | |
9e5987a7 | 2747 | ASSERT(isnullstartblock(new->br_startblock)); |
1da177e4 LT |
2748 | |
2749 | /* | |
9e5987a7 | 2750 | * Check and set flags if this segment has a left neighbor |
1da177e4 | 2751 | */ |
9e5987a7 DC |
2752 | if (*idx > 0) { |
2753 | state |= BMAP_LEFT_VALID; | |
2754 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &left); | |
2755 | ||
2756 | if (isnullstartblock(left.br_startblock)) | |
2757 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 2758 | } |
1da177e4 | 2759 | |
9e5987a7 DC |
2760 | /* |
2761 | * Check and set flags if the current (right) segment exists. | |
2762 | * If it doesn't exist, we're converting the hole at end-of-file. | |
2763 | */ | |
5d829300 | 2764 | if (*idx < xfs_iext_count(ifp)) { |
9e5987a7 DC |
2765 | state |= BMAP_RIGHT_VALID; |
2766 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right); | |
1da177e4 | 2767 | |
9e5987a7 DC |
2768 | if (isnullstartblock(right.br_startblock)) |
2769 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 2770 | } |
9e5987a7 | 2771 | |
1da177e4 | 2772 | /* |
9e5987a7 DC |
2773 | * Set contiguity flags on the left and right neighbors. |
2774 | * Don't let extents get too large, even if the pieces are contiguous. | |
1da177e4 | 2775 | */ |
9e5987a7 DC |
2776 | if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) && |
2777 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
2778 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2779 | state |= BMAP_LEFT_CONTIG; | |
2780 | ||
2781 | if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) && | |
2782 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
2783 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
2784 | (!(state & BMAP_LEFT_CONTIG) || | |
2785 | (left.br_blockcount + new->br_blockcount + | |
2786 | right.br_blockcount <= MAXEXTLEN))) | |
2787 | state |= BMAP_RIGHT_CONTIG; | |
cc09c0dc DC |
2788 | |
2789 | /* | |
9e5987a7 | 2790 | * Switch out based on the contiguity flags. |
cc09c0dc | 2791 | */ |
9e5987a7 DC |
2792 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { |
2793 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2794 | /* | |
2795 | * New allocation is contiguous with delayed allocations | |
2796 | * on the left and on the right. | |
2797 | * Merge all three into a single extent record. | |
2798 | */ | |
2799 | --*idx; | |
2800 | temp = left.br_blockcount + new->br_blockcount + | |
2801 | right.br_blockcount; | |
cc09c0dc | 2802 | |
9e5987a7 DC |
2803 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2804 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); | |
2805 | oldlen = startblockval(left.br_startblock) + | |
2806 | startblockval(new->br_startblock) + | |
2807 | startblockval(right.br_startblock); | |
2808 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2809 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), | |
2810 | nullstartblock((int)newlen)); | |
2811 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2812 | |
9e5987a7 DC |
2813 | xfs_iext_remove(ip, *idx + 1, 1, state); |
2814 | break; | |
1da177e4 | 2815 | |
9e5987a7 DC |
2816 | case BMAP_LEFT_CONTIG: |
2817 | /* | |
2818 | * New allocation is contiguous with a delayed allocation | |
2819 | * on the left. | |
2820 | * Merge the new allocation with the left neighbor. | |
2821 | */ | |
2822 | --*idx; | |
2823 | temp = left.br_blockcount + new->br_blockcount; | |
1da177e4 | 2824 | |
9e5987a7 DC |
2825 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2826 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); | |
2827 | oldlen = startblockval(left.br_startblock) + | |
2828 | startblockval(new->br_startblock); | |
2829 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2830 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), | |
2831 | nullstartblock((int)newlen)); | |
2832 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2833 | break; | |
1da177e4 | 2834 | |
9e5987a7 DC |
2835 | case BMAP_RIGHT_CONTIG: |
2836 | /* | |
2837 | * New allocation is contiguous with a delayed allocation | |
2838 | * on the right. | |
2839 | * Merge the new allocation with the right neighbor. | |
2840 | */ | |
2841 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2842 | temp = new->br_blockcount + right.br_blockcount; | |
2843 | oldlen = startblockval(new->br_startblock) + | |
2844 | startblockval(right.br_startblock); | |
2845 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2846 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), | |
2847 | new->br_startoff, | |
2848 | nullstartblock((int)newlen), temp, right.br_state); | |
2849 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2850 | break; | |
2851 | ||
2852 | case 0: | |
2853 | /* | |
2854 | * New allocation is not contiguous with another | |
2855 | * delayed allocation. | |
2856 | * Insert a new entry. | |
2857 | */ | |
2858 | oldlen = newlen = 0; | |
2859 | xfs_iext_insert(ip, *idx, 1, new, state); | |
2860 | break; | |
1da177e4 | 2861 | } |
9e5987a7 DC |
2862 | if (oldlen != newlen) { |
2863 | ASSERT(oldlen > newlen); | |
0d485ada DC |
2864 | xfs_mod_fdblocks(ip->i_mount, (int64_t)(oldlen - newlen), |
2865 | false); | |
1da177e4 | 2866 | /* |
9e5987a7 | 2867 | * Nothing to do for disk quota accounting here. |
1da177e4 | 2868 | */ |
1da177e4 | 2869 | } |
1da177e4 LT |
2870 | } |
2871 | ||
2872 | /* | |
9e5987a7 | 2873 | * Convert a hole to a real allocation. |
1da177e4 | 2874 | */ |
9e5987a7 DC |
2875 | STATIC int /* error */ |
2876 | xfs_bmap_add_extent_hole_real( | |
2877 | struct xfs_bmalloca *bma, | |
2878 | int whichfork) | |
27a3f8f2 | 2879 | { |
9e5987a7 DC |
2880 | struct xfs_bmbt_irec *new = &bma->got; |
2881 | int error; /* error return value */ | |
2882 | int i; /* temp state */ | |
2883 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
2884 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ | |
2885 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
2886 | int rval=0; /* return value (logging flags) */ | |
2887 | int state; /* state bits, accessed thru macros */ | |
c29aad41 | 2888 | struct xfs_mount *mp; |
27a3f8f2 | 2889 | |
f1f96c49 | 2890 | mp = bma->ip->i_mount; |
9e5987a7 | 2891 | ifp = XFS_IFORK_PTR(bma->ip, whichfork); |
27a3f8f2 | 2892 | |
9e5987a7 | 2893 | ASSERT(bma->idx >= 0); |
5d829300 | 2894 | ASSERT(bma->idx <= xfs_iext_count(ifp)); |
9e5987a7 DC |
2895 | ASSERT(!isnullstartblock(new->br_startblock)); |
2896 | ASSERT(!bma->cur || | |
2897 | !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); | |
3993baeb | 2898 | ASSERT(whichfork != XFS_COW_FORK); |
27a3f8f2 | 2899 | |
ff6d6af2 | 2900 | XFS_STATS_INC(mp, xs_add_exlist); |
27a3f8f2 | 2901 | |
9e5987a7 DC |
2902 | state = 0; |
2903 | if (whichfork == XFS_ATTR_FORK) | |
2904 | state |= BMAP_ATTRFORK; | |
27a3f8f2 | 2905 | |
9e5987a7 DC |
2906 | /* |
2907 | * Check and set flags if this segment has a left neighbor. | |
2908 | */ | |
2909 | if (bma->idx > 0) { | |
2910 | state |= BMAP_LEFT_VALID; | |
2911 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &left); | |
2912 | if (isnullstartblock(left.br_startblock)) | |
2913 | state |= BMAP_LEFT_DELAY; | |
2914 | } | |
27a3f8f2 CH |
2915 | |
2916 | /* | |
9e5987a7 DC |
2917 | * Check and set flags if this segment has a current value. |
2918 | * Not true if we're inserting into the "hole" at eof. | |
27a3f8f2 | 2919 | */ |
5d829300 | 2920 | if (bma->idx < xfs_iext_count(ifp)) { |
9e5987a7 DC |
2921 | state |= BMAP_RIGHT_VALID; |
2922 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &right); | |
2923 | if (isnullstartblock(right.br_startblock)) | |
2924 | state |= BMAP_RIGHT_DELAY; | |
2925 | } | |
27a3f8f2 | 2926 | |
9e5987a7 DC |
2927 | /* |
2928 | * We're inserting a real allocation between "left" and "right". | |
2929 | * Set the contiguity flags. Don't let extents get too large. | |
2930 | */ | |
2931 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
2932 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
2933 | left.br_startblock + left.br_blockcount == new->br_startblock && | |
2934 | left.br_state == new->br_state && | |
2935 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2936 | state |= BMAP_LEFT_CONTIG; | |
27a3f8f2 | 2937 | |
9e5987a7 DC |
2938 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && |
2939 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
2940 | new->br_startblock + new->br_blockcount == right.br_startblock && | |
2941 | new->br_state == right.br_state && | |
2942 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
2943 | (!(state & BMAP_LEFT_CONTIG) || | |
2944 | left.br_blockcount + new->br_blockcount + | |
2945 | right.br_blockcount <= MAXEXTLEN)) | |
2946 | state |= BMAP_RIGHT_CONTIG; | |
27a3f8f2 | 2947 | |
9e5987a7 DC |
2948 | error = 0; |
2949 | /* | |
2950 | * Select which case we're in here, and implement it. | |
2951 | */ | |
2952 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { | |
2953 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2954 | /* | |
2955 | * New allocation is contiguous with real allocations on the | |
2956 | * left and on the right. | |
2957 | * Merge all three into a single extent record. | |
2958 | */ | |
2959 | --bma->idx; | |
2960 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2961 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
2962 | left.br_blockcount + new->br_blockcount + | |
2963 | right.br_blockcount); | |
2964 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
27a3f8f2 | 2965 | |
9e5987a7 | 2966 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); |
27a3f8f2 | 2967 | |
9e5987a7 DC |
2968 | XFS_IFORK_NEXT_SET(bma->ip, whichfork, |
2969 | XFS_IFORK_NEXTENTS(bma->ip, whichfork) - 1); | |
2970 | if (bma->cur == NULL) { | |
2971 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
2972 | } else { | |
2973 | rval = XFS_ILOG_CORE; | |
2974 | error = xfs_bmbt_lookup_eq(bma->cur, right.br_startoff, | |
2975 | right.br_startblock, right.br_blockcount, | |
2976 | &i); | |
2977 | if (error) | |
2978 | goto done; | |
c29aad41 | 2979 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2980 | error = xfs_btree_delete(bma->cur, &i); |
2981 | if (error) | |
2982 | goto done; | |
c29aad41 | 2983 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2984 | error = xfs_btree_decrement(bma->cur, 0, &i); |
2985 | if (error) | |
2986 | goto done; | |
c29aad41 | 2987 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2988 | error = xfs_bmbt_update(bma->cur, left.br_startoff, |
2989 | left.br_startblock, | |
2990 | left.br_blockcount + | |
2991 | new->br_blockcount + | |
2992 | right.br_blockcount, | |
2993 | left.br_state); | |
2994 | if (error) | |
2995 | goto done; | |
2996 | } | |
2997 | break; | |
27a3f8f2 | 2998 | |
9e5987a7 DC |
2999 | case BMAP_LEFT_CONTIG: |
3000 | /* | |
3001 | * New allocation is contiguous with a real allocation | |
3002 | * on the left. | |
3003 | * Merge the new allocation with the left neighbor. | |
3004 | */ | |
3005 | --bma->idx; | |
3006 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3007 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
3008 | left.br_blockcount + new->br_blockcount); | |
3009 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1da177e4 | 3010 | |
9e5987a7 DC |
3011 | if (bma->cur == NULL) { |
3012 | rval = xfs_ilog_fext(whichfork); | |
3013 | } else { | |
3014 | rval = 0; | |
3015 | error = xfs_bmbt_lookup_eq(bma->cur, left.br_startoff, | |
3016 | left.br_startblock, left.br_blockcount, | |
3017 | &i); | |
3018 | if (error) | |
3019 | goto done; | |
c29aad41 | 3020 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3021 | error = xfs_bmbt_update(bma->cur, left.br_startoff, |
3022 | left.br_startblock, | |
3023 | left.br_blockcount + | |
3024 | new->br_blockcount, | |
3025 | left.br_state); | |
3026 | if (error) | |
3027 | goto done; | |
3028 | } | |
3029 | break; | |
27a3f8f2 | 3030 | |
9e5987a7 DC |
3031 | case BMAP_RIGHT_CONTIG: |
3032 | /* | |
3033 | * New allocation is contiguous with a real allocation | |
3034 | * on the right. | |
3035 | * Merge the new allocation with the right neighbor. | |
3036 | */ | |
3037 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3038 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx), | |
3039 | new->br_startoff, new->br_startblock, | |
3040 | new->br_blockcount + right.br_blockcount, | |
3041 | right.br_state); | |
3042 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
27a3f8f2 | 3043 | |
9e5987a7 DC |
3044 | if (bma->cur == NULL) { |
3045 | rval = xfs_ilog_fext(whichfork); | |
3046 | } else { | |
3047 | rval = 0; | |
3048 | error = xfs_bmbt_lookup_eq(bma->cur, | |
3049 | right.br_startoff, | |
3050 | right.br_startblock, | |
3051 | right.br_blockcount, &i); | |
3052 | if (error) | |
3053 | goto done; | |
c29aad41 | 3054 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3055 | error = xfs_bmbt_update(bma->cur, new->br_startoff, |
3056 | new->br_startblock, | |
3057 | new->br_blockcount + | |
3058 | right.br_blockcount, | |
3059 | right.br_state); | |
3060 | if (error) | |
3061 | goto done; | |
3062 | } | |
3063 | break; | |
3064 | ||
3065 | case 0: | |
3066 | /* | |
3067 | * New allocation is not contiguous with another | |
3068 | * real allocation. | |
3069 | * Insert a new entry. | |
3070 | */ | |
3071 | xfs_iext_insert(bma->ip, bma->idx, 1, new, state); | |
3072 | XFS_IFORK_NEXT_SET(bma->ip, whichfork, | |
3073 | XFS_IFORK_NEXTENTS(bma->ip, whichfork) + 1); | |
3074 | if (bma->cur == NULL) { | |
3075 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
3076 | } else { | |
3077 | rval = XFS_ILOG_CORE; | |
3078 | error = xfs_bmbt_lookup_eq(bma->cur, | |
3079 | new->br_startoff, | |
3080 | new->br_startblock, | |
3081 | new->br_blockcount, &i); | |
3082 | if (error) | |
3083 | goto done; | |
c29aad41 | 3084 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
3085 | bma->cur->bc_rec.b.br_state = new->br_state; |
3086 | error = xfs_btree_insert(bma->cur, &i); | |
3087 | if (error) | |
3088 | goto done; | |
c29aad41 | 3089 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3090 | } |
3091 | break; | |
3092 | } | |
3093 | ||
9c194644 DW |
3094 | /* add reverse mapping */ |
3095 | error = xfs_rmap_map_extent(mp, bma->dfops, bma->ip, whichfork, new); | |
3096 | if (error) | |
3097 | goto done; | |
3098 | ||
9e5987a7 DC |
3099 | /* convert to a btree if necessary */ |
3100 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { | |
3101 | int tmp_logflags; /* partial log flag return val */ | |
3102 | ||
3103 | ASSERT(bma->cur == NULL); | |
3104 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2c3234d1 | 3105 | bma->firstblock, bma->dfops, &bma->cur, |
9e5987a7 DC |
3106 | 0, &tmp_logflags, whichfork); |
3107 | bma->logflags |= tmp_logflags; | |
3108 | if (error) | |
3109 | goto done; | |
3110 | } | |
3111 | ||
3112 | /* clear out the allocated field, done with it now in any case. */ | |
3113 | if (bma->cur) | |
3114 | bma->cur->bc_private.b.allocated = 0; | |
3115 | ||
3116 | xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); | |
3117 | done: | |
3118 | bma->logflags |= rval; | |
3119 | return error; | |
1da177e4 LT |
3120 | } |
3121 | ||
3122 | /* | |
9e5987a7 | 3123 | * Functions used in the extent read, allocate and remove paths |
1da177e4 | 3124 | */ |
1da177e4 | 3125 | |
9e5987a7 DC |
3126 | /* |
3127 | * Adjust the size of the new extent based on di_extsize and rt extsize. | |
3128 | */ | |
68988114 | 3129 | int |
9e5987a7 DC |
3130 | xfs_bmap_extsize_align( |
3131 | xfs_mount_t *mp, | |
3132 | xfs_bmbt_irec_t *gotp, /* next extent pointer */ | |
3133 | xfs_bmbt_irec_t *prevp, /* previous extent pointer */ | |
3134 | xfs_extlen_t extsz, /* align to this extent size */ | |
3135 | int rt, /* is this a realtime inode? */ | |
3136 | int eof, /* is extent at end-of-file? */ | |
3137 | int delay, /* creating delalloc extent? */ | |
3138 | int convert, /* overwriting unwritten extent? */ | |
3139 | xfs_fileoff_t *offp, /* in/out: aligned offset */ | |
3140 | xfs_extlen_t *lenp) /* in/out: aligned length */ | |
4e8938fe | 3141 | { |
9e5987a7 DC |
3142 | xfs_fileoff_t orig_off; /* original offset */ |
3143 | xfs_extlen_t orig_alen; /* original length */ | |
3144 | xfs_fileoff_t orig_end; /* original off+len */ | |
3145 | xfs_fileoff_t nexto; /* next file offset */ | |
3146 | xfs_fileoff_t prevo; /* previous file offset */ | |
3147 | xfs_fileoff_t align_off; /* temp for offset */ | |
3148 | xfs_extlen_t align_alen; /* temp for length */ | |
3149 | xfs_extlen_t temp; /* temp for calculations */ | |
4e8938fe | 3150 | |
9e5987a7 | 3151 | if (convert) |
4e8938fe | 3152 | return 0; |
4e8938fe | 3153 | |
9e5987a7 DC |
3154 | orig_off = align_off = *offp; |
3155 | orig_alen = align_alen = *lenp; | |
3156 | orig_end = orig_off + orig_alen; | |
1da177e4 | 3157 | |
1da177e4 | 3158 | /* |
9e5987a7 DC |
3159 | * If this request overlaps an existing extent, then don't |
3160 | * attempt to perform any additional alignment. | |
1da177e4 | 3161 | */ |
9e5987a7 DC |
3162 | if (!delay && !eof && |
3163 | (orig_off >= gotp->br_startoff) && | |
3164 | (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { | |
3165 | return 0; | |
3166 | } | |
3167 | ||
1da177e4 | 3168 | /* |
9e5987a7 DC |
3169 | * If the file offset is unaligned vs. the extent size |
3170 | * we need to align it. This will be possible unless | |
3171 | * the file was previously written with a kernel that didn't | |
3172 | * perform this alignment, or if a truncate shot us in the | |
3173 | * foot. | |
1da177e4 | 3174 | */ |
9e5987a7 DC |
3175 | temp = do_mod(orig_off, extsz); |
3176 | if (temp) { | |
3177 | align_alen += temp; | |
3178 | align_off -= temp; | |
1da177e4 | 3179 | } |
6dea405e DC |
3180 | |
3181 | /* Same adjustment for the end of the requested area. */ | |
3182 | temp = (align_alen % extsz); | |
3183 | if (temp) | |
3184 | align_alen += extsz - temp; | |
3185 | ||
1da177e4 | 3186 | /* |
6dea405e DC |
3187 | * For large extent hint sizes, the aligned extent might be larger than |
3188 | * MAXEXTLEN. In that case, reduce the size by an extsz so that it pulls | |
3189 | * the length back under MAXEXTLEN. The outer allocation loops handle | |
3190 | * short allocation just fine, so it is safe to do this. We only want to | |
3191 | * do it when we are forced to, though, because it means more allocation | |
3192 | * operations are required. | |
1da177e4 | 3193 | */ |
6dea405e DC |
3194 | while (align_alen > MAXEXTLEN) |
3195 | align_alen -= extsz; | |
3196 | ASSERT(align_alen <= MAXEXTLEN); | |
3197 | ||
1da177e4 | 3198 | /* |
9e5987a7 DC |
3199 | * If the previous block overlaps with this proposed allocation |
3200 | * then move the start forward without adjusting the length. | |
1da177e4 | 3201 | */ |
9e5987a7 DC |
3202 | if (prevp->br_startoff != NULLFILEOFF) { |
3203 | if (prevp->br_startblock == HOLESTARTBLOCK) | |
3204 | prevo = prevp->br_startoff; | |
3205 | else | |
3206 | prevo = prevp->br_startoff + prevp->br_blockcount; | |
3207 | } else | |
3208 | prevo = 0; | |
3209 | if (align_off != orig_off && align_off < prevo) | |
3210 | align_off = prevo; | |
3211 | /* | |
3212 | * If the next block overlaps with this proposed allocation | |
3213 | * then move the start back without adjusting the length, | |
3214 | * but not before offset 0. | |
3215 | * This may of course make the start overlap previous block, | |
3216 | * and if we hit the offset 0 limit then the next block | |
3217 | * can still overlap too. | |
3218 | */ | |
3219 | if (!eof && gotp->br_startoff != NULLFILEOFF) { | |
3220 | if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || | |
3221 | (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) | |
3222 | nexto = gotp->br_startoff + gotp->br_blockcount; | |
3223 | else | |
3224 | nexto = gotp->br_startoff; | |
3225 | } else | |
3226 | nexto = NULLFILEOFF; | |
3227 | if (!eof && | |
3228 | align_off + align_alen != orig_end && | |
3229 | align_off + align_alen > nexto) | |
3230 | align_off = nexto > align_alen ? nexto - align_alen : 0; | |
3231 | /* | |
3232 | * If we're now overlapping the next or previous extent that | |
3233 | * means we can't fit an extsz piece in this hole. Just move | |
3234 | * the start forward to the first valid spot and set | |
3235 | * the length so we hit the end. | |
3236 | */ | |
3237 | if (align_off != orig_off && align_off < prevo) | |
3238 | align_off = prevo; | |
3239 | if (align_off + align_alen != orig_end && | |
3240 | align_off + align_alen > nexto && | |
3241 | nexto != NULLFILEOFF) { | |
3242 | ASSERT(nexto > prevo); | |
3243 | align_alen = nexto - align_off; | |
3244 | } | |
1da177e4 | 3245 | |
9e5987a7 DC |
3246 | /* |
3247 | * If realtime, and the result isn't a multiple of the realtime | |
3248 | * extent size we need to remove blocks until it is. | |
3249 | */ | |
3250 | if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { | |
1da177e4 | 3251 | /* |
9e5987a7 DC |
3252 | * We're not covering the original request, or |
3253 | * we won't be able to once we fix the length. | |
1da177e4 | 3254 | */ |
9e5987a7 DC |
3255 | if (orig_off < align_off || |
3256 | orig_end > align_off + align_alen || | |
3257 | align_alen - temp < orig_alen) | |
2451337d | 3258 | return -EINVAL; |
1da177e4 | 3259 | /* |
9e5987a7 | 3260 | * Try to fix it by moving the start up. |
1da177e4 | 3261 | */ |
9e5987a7 DC |
3262 | if (align_off + temp <= orig_off) { |
3263 | align_alen -= temp; | |
3264 | align_off += temp; | |
1da177e4 | 3265 | } |
9e5987a7 DC |
3266 | /* |
3267 | * Try to fix it by moving the end in. | |
3268 | */ | |
3269 | else if (align_off + align_alen - temp >= orig_end) | |
3270 | align_alen -= temp; | |
3271 | /* | |
3272 | * Set the start to the minimum then trim the length. | |
3273 | */ | |
3274 | else { | |
3275 | align_alen -= orig_off - align_off; | |
3276 | align_off = orig_off; | |
3277 | align_alen -= align_alen % mp->m_sb.sb_rextsize; | |
1da177e4 | 3278 | } |
1da177e4 | 3279 | /* |
9e5987a7 | 3280 | * Result doesn't cover the request, fail it. |
1da177e4 | 3281 | */ |
9e5987a7 | 3282 | if (orig_off < align_off || orig_end > align_off + align_alen) |
2451337d | 3283 | return -EINVAL; |
9e5987a7 DC |
3284 | } else { |
3285 | ASSERT(orig_off >= align_off); | |
6dea405e DC |
3286 | /* see MAXEXTLEN handling above */ |
3287 | ASSERT(orig_end <= align_off + align_alen || | |
3288 | align_alen + extsz > MAXEXTLEN); | |
1da177e4 | 3289 | } |
1da177e4 | 3290 | |
0b1b213f | 3291 | #ifdef DEBUG |
9e5987a7 DC |
3292 | if (!eof && gotp->br_startoff != NULLFILEOFF) |
3293 | ASSERT(align_off + align_alen <= gotp->br_startoff); | |
3294 | if (prevp->br_startoff != NULLFILEOFF) | |
3295 | ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); | |
3296 | #endif | |
1da177e4 | 3297 | |
9e5987a7 DC |
3298 | *lenp = align_alen; |
3299 | *offp = align_off; | |
3300 | return 0; | |
1da177e4 | 3301 | } |
1da177e4 | 3302 | |
9e5987a7 DC |
3303 | #define XFS_ALLOC_GAP_UNITS 4 |
3304 | ||
68988114 | 3305 | void |
9e5987a7 | 3306 | xfs_bmap_adjacent( |
68988114 | 3307 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
1da177e4 | 3308 | { |
9e5987a7 DC |
3309 | xfs_fsblock_t adjust; /* adjustment to block numbers */ |
3310 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ | |
3311 | xfs_mount_t *mp; /* mount point structure */ | |
3312 | int nullfb; /* true if ap->firstblock isn't set */ | |
3313 | int rt; /* true if inode is realtime */ | |
1da177e4 | 3314 | |
9e5987a7 DC |
3315 | #define ISVALID(x,y) \ |
3316 | (rt ? \ | |
3317 | (x) < mp->m_sb.sb_rblocks : \ | |
3318 | XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ | |
3319 | XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ | |
3320 | XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) | |
1da177e4 | 3321 | |
9e5987a7 DC |
3322 | mp = ap->ip->i_mount; |
3323 | nullfb = *ap->firstblock == NULLFSBLOCK; | |
292378ed DC |
3324 | rt = XFS_IS_REALTIME_INODE(ap->ip) && |
3325 | xfs_alloc_is_userdata(ap->datatype); | |
9e5987a7 DC |
3326 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); |
3327 | /* | |
3328 | * If allocating at eof, and there's a previous real block, | |
3329 | * try to use its last block as our starting point. | |
3330 | */ | |
3331 | if (ap->eof && ap->prev.br_startoff != NULLFILEOFF && | |
3332 | !isnullstartblock(ap->prev.br_startblock) && | |
3333 | ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount, | |
3334 | ap->prev.br_startblock)) { | |
3335 | ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount; | |
3336 | /* | |
3337 | * Adjust for the gap between prevp and us. | |
3338 | */ | |
3339 | adjust = ap->offset - | |
3340 | (ap->prev.br_startoff + ap->prev.br_blockcount); | |
3341 | if (adjust && | |
3342 | ISVALID(ap->blkno + adjust, ap->prev.br_startblock)) | |
3343 | ap->blkno += adjust; | |
3344 | } | |
3345 | /* | |
3346 | * If not at eof, then compare the two neighbor blocks. | |
3347 | * Figure out whether either one gives us a good starting point, | |
3348 | * and pick the better one. | |
3349 | */ | |
3350 | else if (!ap->eof) { | |
3351 | xfs_fsblock_t gotbno; /* right side block number */ | |
3352 | xfs_fsblock_t gotdiff=0; /* right side difference */ | |
3353 | xfs_fsblock_t prevbno; /* left side block number */ | |
3354 | xfs_fsblock_t prevdiff=0; /* left side difference */ | |
3355 | ||
3356 | /* | |
3357 | * If there's a previous (left) block, select a requested | |
3358 | * start block based on it. | |
3359 | */ | |
3360 | if (ap->prev.br_startoff != NULLFILEOFF && | |
3361 | !isnullstartblock(ap->prev.br_startblock) && | |
3362 | (prevbno = ap->prev.br_startblock + | |
3363 | ap->prev.br_blockcount) && | |
3364 | ISVALID(prevbno, ap->prev.br_startblock)) { | |
3365 | /* | |
3366 | * Calculate gap to end of previous block. | |
3367 | */ | |
3368 | adjust = prevdiff = ap->offset - | |
3369 | (ap->prev.br_startoff + | |
3370 | ap->prev.br_blockcount); | |
3371 | /* | |
3372 | * Figure the startblock based on the previous block's | |
3373 | * end and the gap size. | |
3374 | * Heuristic! | |
3375 | * If the gap is large relative to the piece we're | |
3376 | * allocating, or using it gives us an invalid block | |
3377 | * number, then just use the end of the previous block. | |
3378 | */ | |
3379 | if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length && | |
3380 | ISVALID(prevbno + prevdiff, | |
3381 | ap->prev.br_startblock)) | |
3382 | prevbno += adjust; | |
3383 | else | |
3384 | prevdiff += adjust; | |
3385 | /* | |
3386 | * If the firstblock forbids it, can't use it, | |
3387 | * must use default. | |
3388 | */ | |
3389 | if (!rt && !nullfb && | |
3390 | XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) | |
3391 | prevbno = NULLFSBLOCK; | |
1da177e4 | 3392 | } |
9e5987a7 DC |
3393 | /* |
3394 | * No previous block or can't follow it, just default. | |
3395 | */ | |
3396 | else | |
3397 | prevbno = NULLFSBLOCK; | |
3398 | /* | |
3399 | * If there's a following (right) block, select a requested | |
3400 | * start block based on it. | |
3401 | */ | |
3402 | if (!isnullstartblock(ap->got.br_startblock)) { | |
3403 | /* | |
3404 | * Calculate gap to start of next block. | |
3405 | */ | |
3406 | adjust = gotdiff = ap->got.br_startoff - ap->offset; | |
3407 | /* | |
3408 | * Figure the startblock based on the next block's | |
3409 | * start and the gap size. | |
3410 | */ | |
3411 | gotbno = ap->got.br_startblock; | |
3412 | /* | |
3413 | * Heuristic! | |
3414 | * If the gap is large relative to the piece we're | |
3415 | * allocating, or using it gives us an invalid block | |
3416 | * number, then just use the start of the next block | |
3417 | * offset by our length. | |
3418 | */ | |
3419 | if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length && | |
3420 | ISVALID(gotbno - gotdiff, gotbno)) | |
3421 | gotbno -= adjust; | |
3422 | else if (ISVALID(gotbno - ap->length, gotbno)) { | |
3423 | gotbno -= ap->length; | |
3424 | gotdiff += adjust - ap->length; | |
3425 | } else | |
3426 | gotdiff += adjust; | |
3427 | /* | |
3428 | * If the firstblock forbids it, can't use it, | |
3429 | * must use default. | |
3430 | */ | |
3431 | if (!rt && !nullfb && | |
3432 | XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) | |
3433 | gotbno = NULLFSBLOCK; | |
3434 | } | |
3435 | /* | |
3436 | * No next block, just default. | |
3437 | */ | |
3438 | else | |
3439 | gotbno = NULLFSBLOCK; | |
3440 | /* | |
3441 | * If both valid, pick the better one, else the only good | |
3442 | * one, else ap->blkno is already set (to 0 or the inode block). | |
3443 | */ | |
3444 | if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) | |
3445 | ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno; | |
3446 | else if (prevbno != NULLFSBLOCK) | |
3447 | ap->blkno = prevbno; | |
3448 | else if (gotbno != NULLFSBLOCK) | |
3449 | ap->blkno = gotbno; | |
1da177e4 | 3450 | } |
9e5987a7 | 3451 | #undef ISVALID |
1da177e4 | 3452 | } |
1da177e4 | 3453 | |
c977eb10 CH |
3454 | static int |
3455 | xfs_bmap_longest_free_extent( | |
3456 | struct xfs_trans *tp, | |
3457 | xfs_agnumber_t ag, | |
3458 | xfs_extlen_t *blen, | |
3459 | int *notinit) | |
3460 | { | |
3461 | struct xfs_mount *mp = tp->t_mountp; | |
3462 | struct xfs_perag *pag; | |
3463 | xfs_extlen_t longest; | |
3464 | int error = 0; | |
3465 | ||
3466 | pag = xfs_perag_get(mp, ag); | |
3467 | if (!pag->pagf_init) { | |
3468 | error = xfs_alloc_pagf_init(mp, tp, ag, XFS_ALLOC_FLAG_TRYLOCK); | |
3469 | if (error) | |
3470 | goto out; | |
3471 | ||
3472 | if (!pag->pagf_init) { | |
3473 | *notinit = 1; | |
3474 | goto out; | |
3475 | } | |
3476 | } | |
3477 | ||
50adbcb4 | 3478 | longest = xfs_alloc_longest_free_extent(mp, pag, |
3fd129b6 DW |
3479 | xfs_alloc_min_freelist(mp, pag), |
3480 | xfs_ag_resv_needed(pag, XFS_AG_RESV_NONE)); | |
c977eb10 CH |
3481 | if (*blen < longest) |
3482 | *blen = longest; | |
3483 | ||
3484 | out: | |
3485 | xfs_perag_put(pag); | |
3486 | return error; | |
3487 | } | |
3488 | ||
3489 | static void | |
3490 | xfs_bmap_select_minlen( | |
3491 | struct xfs_bmalloca *ap, | |
3492 | struct xfs_alloc_arg *args, | |
3493 | xfs_extlen_t *blen, | |
3494 | int notinit) | |
3495 | { | |
3496 | if (notinit || *blen < ap->minlen) { | |
3497 | /* | |
3498 | * Since we did a BUF_TRYLOCK above, it is possible that | |
3499 | * there is space for this request. | |
3500 | */ | |
3501 | args->minlen = ap->minlen; | |
3502 | } else if (*blen < args->maxlen) { | |
3503 | /* | |
3504 | * If the best seen length is less than the request length, | |
3505 | * use the best as the minimum. | |
3506 | */ | |
3507 | args->minlen = *blen; | |
3508 | } else { | |
3509 | /* | |
3510 | * Otherwise we've seen an extent as big as maxlen, use that | |
3511 | * as the minimum. | |
3512 | */ | |
3513 | args->minlen = args->maxlen; | |
3514 | } | |
3515 | } | |
3516 | ||
b64dfe4e | 3517 | STATIC int |
9e5987a7 DC |
3518 | xfs_bmap_btalloc_nullfb( |
3519 | struct xfs_bmalloca *ap, | |
3520 | struct xfs_alloc_arg *args, | |
3521 | xfs_extlen_t *blen) | |
b64dfe4e | 3522 | { |
9e5987a7 | 3523 | struct xfs_mount *mp = ap->ip->i_mount; |
9e5987a7 DC |
3524 | xfs_agnumber_t ag, startag; |
3525 | int notinit = 0; | |
b64dfe4e CH |
3526 | int error; |
3527 | ||
c977eb10 | 3528 | args->type = XFS_ALLOCTYPE_START_BNO; |
9e5987a7 | 3529 | args->total = ap->total; |
b64dfe4e | 3530 | |
9e5987a7 DC |
3531 | startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); |
3532 | if (startag == NULLAGNUMBER) | |
3533 | startag = ag = 0; | |
b64dfe4e | 3534 | |
9e5987a7 | 3535 | while (*blen < args->maxlen) { |
c977eb10 CH |
3536 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, |
3537 | ¬init); | |
3538 | if (error) | |
3539 | return error; | |
b64dfe4e | 3540 | |
9e5987a7 DC |
3541 | if (++ag == mp->m_sb.sb_agcount) |
3542 | ag = 0; | |
3543 | if (ag == startag) | |
3544 | break; | |
9e5987a7 | 3545 | } |
b64dfe4e | 3546 | |
c977eb10 CH |
3547 | xfs_bmap_select_minlen(ap, args, blen, notinit); |
3548 | return 0; | |
3549 | } | |
3550 | ||
3551 | STATIC int | |
3552 | xfs_bmap_btalloc_filestreams( | |
3553 | struct xfs_bmalloca *ap, | |
3554 | struct xfs_alloc_arg *args, | |
3555 | xfs_extlen_t *blen) | |
3556 | { | |
3557 | struct xfs_mount *mp = ap->ip->i_mount; | |
3558 | xfs_agnumber_t ag; | |
3559 | int notinit = 0; | |
3560 | int error; | |
3561 | ||
3562 | args->type = XFS_ALLOCTYPE_NEAR_BNO; | |
3563 | args->total = ap->total; | |
3564 | ||
3565 | ag = XFS_FSB_TO_AGNO(mp, args->fsbno); | |
3566 | if (ag == NULLAGNUMBER) | |
3567 | ag = 0; | |
3568 | ||
3569 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, ¬init); | |
3570 | if (error) | |
3571 | return error; | |
3572 | ||
3573 | if (*blen < args->maxlen) { | |
3574 | error = xfs_filestream_new_ag(ap, &ag); | |
3575 | if (error) | |
3576 | return error; | |
3577 | ||
3578 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, | |
3579 | ¬init); | |
3580 | if (error) | |
3581 | return error; | |
3582 | ||
3583 | } | |
3584 | ||
3585 | xfs_bmap_select_minlen(ap, args, blen, notinit); | |
b64dfe4e CH |
3586 | |
3587 | /* | |
c977eb10 CH |
3588 | * Set the failure fallback case to look in the selected AG as stream |
3589 | * may have moved. | |
b64dfe4e | 3590 | */ |
c977eb10 | 3591 | ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0); |
b64dfe4e | 3592 | return 0; |
b64dfe4e CH |
3593 | } |
3594 | ||
9e5987a7 DC |
3595 | STATIC int |
3596 | xfs_bmap_btalloc( | |
68988114 | 3597 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
4403280a | 3598 | { |
9e5987a7 DC |
3599 | xfs_mount_t *mp; /* mount point structure */ |
3600 | xfs_alloctype_t atype = 0; /* type for allocation routines */ | |
292378ed | 3601 | xfs_extlen_t align = 0; /* minimum allocation alignment */ |
9e5987a7 DC |
3602 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ |
3603 | xfs_agnumber_t ag; | |
3604 | xfs_alloc_arg_t args; | |
3605 | xfs_extlen_t blen; | |
3606 | xfs_extlen_t nextminlen = 0; | |
3607 | int nullfb; /* true if ap->firstblock isn't set */ | |
3608 | int isaligned; | |
3609 | int tryagain; | |
3610 | int error; | |
33177f05 | 3611 | int stripe_align; |
4403280a | 3612 | |
9e5987a7 | 3613 | ASSERT(ap->length); |
4403280a | 3614 | |
9e5987a7 | 3615 | mp = ap->ip->i_mount; |
33177f05 DC |
3616 | |
3617 | /* stripe alignment for allocation is determined by mount parameters */ | |
3618 | stripe_align = 0; | |
3619 | if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) | |
3620 | stripe_align = mp->m_swidth; | |
3621 | else if (mp->m_dalign) | |
3622 | stripe_align = mp->m_dalign; | |
3623 | ||
f7ca3522 DW |
3624 | if (ap->flags & XFS_BMAPI_COWFORK) |
3625 | align = xfs_get_cowextsz_hint(ap->ip); | |
3626 | else if (xfs_alloc_is_userdata(ap->datatype)) | |
292378ed | 3627 | align = xfs_get_extsz_hint(ap->ip); |
9e5987a7 DC |
3628 | if (unlikely(align)) { |
3629 | error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, | |
3630 | align, 0, ap->eof, 0, ap->conv, | |
3631 | &ap->offset, &ap->length); | |
3632 | ASSERT(!error); | |
3633 | ASSERT(ap->length); | |
4403280a | 3634 | } |
33177f05 DC |
3635 | |
3636 | ||
9e5987a7 DC |
3637 | nullfb = *ap->firstblock == NULLFSBLOCK; |
3638 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); | |
3639 | if (nullfb) { | |
292378ed DC |
3640 | if (xfs_alloc_is_userdata(ap->datatype) && |
3641 | xfs_inode_is_filestream(ap->ip)) { | |
9e5987a7 DC |
3642 | ag = xfs_filestream_lookup_ag(ap->ip); |
3643 | ag = (ag != NULLAGNUMBER) ? ag : 0; | |
3644 | ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); | |
3645 | } else { | |
3646 | ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); | |
3647 | } | |
3648 | } else | |
3649 | ap->blkno = *ap->firstblock; | |
4403280a | 3650 | |
9e5987a7 | 3651 | xfs_bmap_adjacent(ap); |
4403280a | 3652 | |
9e5987a7 DC |
3653 | /* |
3654 | * If allowed, use ap->blkno; otherwise must use firstblock since | |
3655 | * it's in the right allocation group. | |
3656 | */ | |
3657 | if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) | |
3658 | ; | |
3659 | else | |
3660 | ap->blkno = *ap->firstblock; | |
3661 | /* | |
3662 | * Normal allocation, done through xfs_alloc_vextent. | |
3663 | */ | |
3664 | tryagain = isaligned = 0; | |
3665 | memset(&args, 0, sizeof(args)); | |
3666 | args.tp = ap->tp; | |
3667 | args.mp = mp; | |
3668 | args.fsbno = ap->blkno; | |
340785cc | 3669 | xfs_rmap_skip_owner_update(&args.oinfo); |
4403280a | 3670 | |
9e5987a7 | 3671 | /* Trim the allocation back to the maximum an AG can fit. */ |
52548852 | 3672 | args.maxlen = MIN(ap->length, mp->m_ag_max_usable); |
9e5987a7 DC |
3673 | args.firstblock = *ap->firstblock; |
3674 | blen = 0; | |
3675 | if (nullfb) { | |
c977eb10 CH |
3676 | /* |
3677 | * Search for an allocation group with a single extent large | |
3678 | * enough for the request. If one isn't found, then adjust | |
3679 | * the minimum allocation size to the largest space found. | |
3680 | */ | |
292378ed DC |
3681 | if (xfs_alloc_is_userdata(ap->datatype) && |
3682 | xfs_inode_is_filestream(ap->ip)) | |
c977eb10 CH |
3683 | error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); |
3684 | else | |
3685 | error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); | |
4403280a CH |
3686 | if (error) |
3687 | return error; | |
2c3234d1 | 3688 | } else if (ap->dfops->dop_low) { |
9e5987a7 DC |
3689 | if (xfs_inode_is_filestream(ap->ip)) |
3690 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
3691 | else | |
3692 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3693 | args.total = args.minlen = ap->minlen; | |
3694 | } else { | |
3695 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
3696 | args.total = ap->total; | |
3697 | args.minlen = ap->minlen; | |
4403280a | 3698 | } |
9e5987a7 DC |
3699 | /* apply extent size hints if obtained earlier */ |
3700 | if (unlikely(align)) { | |
3701 | args.prod = align; | |
3702 | if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod))) | |
3703 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
09cbfeaf | 3704 | } else if (mp->m_sb.sb_blocksize >= PAGE_SIZE) { |
9e5987a7 DC |
3705 | args.prod = 1; |
3706 | args.mod = 0; | |
3707 | } else { | |
09cbfeaf | 3708 | args.prod = PAGE_SIZE >> mp->m_sb.sb_blocklog; |
9e5987a7 DC |
3709 | if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod)))) |
3710 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
4403280a | 3711 | } |
7e47a4ef | 3712 | /* |
9e5987a7 DC |
3713 | * If we are not low on available data blocks, and the |
3714 | * underlying logical volume manager is a stripe, and | |
3715 | * the file offset is zero then try to allocate data | |
3716 | * blocks on stripe unit boundary. | |
3717 | * NOTE: ap->aeof is only set if the allocation length | |
3718 | * is >= the stripe unit and the allocation offset is | |
3719 | * at the end of file. | |
7e47a4ef | 3720 | */ |
2c3234d1 | 3721 | if (!ap->dfops->dop_low && ap->aeof) { |
9e5987a7 | 3722 | if (!ap->offset) { |
33177f05 | 3723 | args.alignment = stripe_align; |
9e5987a7 DC |
3724 | atype = args.type; |
3725 | isaligned = 1; | |
3726 | /* | |
3727 | * Adjust for alignment | |
3728 | */ | |
3729 | if (blen > args.alignment && blen <= args.maxlen) | |
3730 | args.minlen = blen - args.alignment; | |
3731 | args.minalignslop = 0; | |
3732 | } else { | |
3733 | /* | |
3734 | * First try an exact bno allocation. | |
3735 | * If it fails then do a near or start bno | |
3736 | * allocation with alignment turned on. | |
3737 | */ | |
3738 | atype = args.type; | |
3739 | tryagain = 1; | |
3740 | args.type = XFS_ALLOCTYPE_THIS_BNO; | |
3741 | args.alignment = 1; | |
3742 | /* | |
3743 | * Compute the minlen+alignment for the | |
3744 | * next case. Set slop so that the value | |
3745 | * of minlen+alignment+slop doesn't go up | |
3746 | * between the calls. | |
3747 | */ | |
33177f05 DC |
3748 | if (blen > stripe_align && blen <= args.maxlen) |
3749 | nextminlen = blen - stripe_align; | |
9e5987a7 DC |
3750 | else |
3751 | nextminlen = args.minlen; | |
33177f05 | 3752 | if (nextminlen + stripe_align > args.minlen + 1) |
9e5987a7 | 3753 | args.minalignslop = |
33177f05 | 3754 | nextminlen + stripe_align - |
9e5987a7 DC |
3755 | args.minlen - 1; |
3756 | else | |
3757 | args.minalignslop = 0; | |
7e47a4ef DC |
3758 | } |
3759 | } else { | |
9e5987a7 DC |
3760 | args.alignment = 1; |
3761 | args.minalignslop = 0; | |
7e47a4ef | 3762 | } |
9e5987a7 DC |
3763 | args.minleft = ap->minleft; |
3764 | args.wasdel = ap->wasdel; | |
3fd129b6 | 3765 | args.resv = XFS_AG_RESV_NONE; |
292378ed DC |
3766 | args.datatype = ap->datatype; |
3767 | if (ap->datatype & XFS_ALLOC_USERDATA_ZERO) | |
3fbbbea3 DC |
3768 | args.ip = ap->ip; |
3769 | ||
3770 | error = xfs_alloc_vextent(&args); | |
3771 | if (error) | |
9e5987a7 | 3772 | return error; |
3fbbbea3 | 3773 | |
9e5987a7 DC |
3774 | if (tryagain && args.fsbno == NULLFSBLOCK) { |
3775 | /* | |
3776 | * Exact allocation failed. Now try with alignment | |
3777 | * turned on. | |
3778 | */ | |
3779 | args.type = atype; | |
3780 | args.fsbno = ap->blkno; | |
33177f05 | 3781 | args.alignment = stripe_align; |
9e5987a7 DC |
3782 | args.minlen = nextminlen; |
3783 | args.minalignslop = 0; | |
3784 | isaligned = 1; | |
3785 | if ((error = xfs_alloc_vextent(&args))) | |
3786 | return error; | |
7e47a4ef | 3787 | } |
9e5987a7 DC |
3788 | if (isaligned && args.fsbno == NULLFSBLOCK) { |
3789 | /* | |
3790 | * allocation failed, so turn off alignment and | |
3791 | * try again. | |
3792 | */ | |
3793 | args.type = atype; | |
3794 | args.fsbno = ap->blkno; | |
3795 | args.alignment = 0; | |
3796 | if ((error = xfs_alloc_vextent(&args))) | |
7e47a4ef DC |
3797 | return error; |
3798 | } | |
9e5987a7 DC |
3799 | if (args.fsbno == NULLFSBLOCK && nullfb && |
3800 | args.minlen > ap->minlen) { | |
3801 | args.minlen = ap->minlen; | |
3802 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3803 | args.fsbno = ap->blkno; | |
3804 | if ((error = xfs_alloc_vextent(&args))) | |
3805 | return error; | |
7e47a4ef | 3806 | } |
9e5987a7 DC |
3807 | if (args.fsbno == NULLFSBLOCK && nullfb) { |
3808 | args.fsbno = 0; | |
3809 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
3810 | args.total = ap->minlen; | |
3811 | args.minleft = 0; | |
3812 | if ((error = xfs_alloc_vextent(&args))) | |
3813 | return error; | |
2c3234d1 | 3814 | ap->dfops->dop_low = true; |
9e5987a7 DC |
3815 | } |
3816 | if (args.fsbno != NULLFSBLOCK) { | |
3817 | /* | |
3818 | * check the allocation happened at the same or higher AG than | |
3819 | * the first block that was allocated. | |
3820 | */ | |
3821 | ASSERT(*ap->firstblock == NULLFSBLOCK || | |
3822 | XFS_FSB_TO_AGNO(mp, *ap->firstblock) == | |
3823 | XFS_FSB_TO_AGNO(mp, args.fsbno) || | |
2c3234d1 | 3824 | (ap->dfops->dop_low && |
9e5987a7 DC |
3825 | XFS_FSB_TO_AGNO(mp, *ap->firstblock) < |
3826 | XFS_FSB_TO_AGNO(mp, args.fsbno))); | |
7e47a4ef | 3827 | |
9e5987a7 DC |
3828 | ap->blkno = args.fsbno; |
3829 | if (*ap->firstblock == NULLFSBLOCK) | |
3830 | *ap->firstblock = args.fsbno; | |
3831 | ASSERT(nullfb || fb_agno == args.agno || | |
2c3234d1 | 3832 | (ap->dfops->dop_low && fb_agno < args.agno)); |
9e5987a7 | 3833 | ap->length = args.len; |
60b4984f DW |
3834 | if (!(ap->flags & XFS_BMAPI_COWFORK)) |
3835 | ap->ip->i_d.di_nblocks += args.len; | |
9e5987a7 DC |
3836 | xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); |
3837 | if (ap->wasdel) | |
3838 | ap->ip->i_delayed_blks -= args.len; | |
3839 | /* | |
3840 | * Adjust the disk quota also. This was reserved | |
3841 | * earlier. | |
3842 | */ | |
3843 | xfs_trans_mod_dquot_byino(ap->tp, ap->ip, | |
3844 | ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : | |
3845 | XFS_TRANS_DQ_BCOUNT, | |
3846 | (long) args.len); | |
3847 | } else { | |
3848 | ap->blkno = NULLFSBLOCK; | |
3849 | ap->length = 0; | |
3850 | } | |
3851 | return 0; | |
3852 | } | |
7e47a4ef | 3853 | |
f65306ea DW |
3854 | /* |
3855 | * For a remap operation, just "allocate" an extent at the address that the | |
3856 | * caller passed in, and ensure that the AGFL is the right size. The caller | |
3857 | * will then map the "allocated" extent into the file somewhere. | |
3858 | */ | |
3859 | STATIC int | |
3860 | xfs_bmap_remap_alloc( | |
3861 | struct xfs_bmalloca *ap) | |
3862 | { | |
3863 | struct xfs_trans *tp = ap->tp; | |
3864 | struct xfs_mount *mp = tp->t_mountp; | |
3865 | xfs_agblock_t bno; | |
3866 | struct xfs_alloc_arg args; | |
3867 | int error; | |
3868 | ||
3869 | /* | |
3870 | * validate that the block number is legal - the enables us to detect | |
3871 | * and handle a silent filesystem corruption rather than crashing. | |
3872 | */ | |
3873 | memset(&args, 0, sizeof(struct xfs_alloc_arg)); | |
3874 | args.tp = ap->tp; | |
3875 | args.mp = ap->tp->t_mountp; | |
3876 | bno = *ap->firstblock; | |
3877 | args.agno = XFS_FSB_TO_AGNO(mp, bno); | |
3878 | args.agbno = XFS_FSB_TO_AGBNO(mp, bno); | |
3879 | if (args.agno >= mp->m_sb.sb_agcount || | |
3880 | args.agbno >= mp->m_sb.sb_agblocks) | |
3881 | return -EFSCORRUPTED; | |
3882 | ||
3883 | /* "Allocate" the extent from the range we passed in. */ | |
3884 | trace_xfs_bmap_remap_alloc(ap->ip, *ap->firstblock, ap->length); | |
3885 | ap->blkno = bno; | |
3886 | ap->ip->i_d.di_nblocks += ap->length; | |
3887 | xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); | |
3888 | ||
3889 | /* Fix the freelist, like a real allocator does. */ | |
3890 | args.datatype = ap->datatype; | |
3891 | args.pag = xfs_perag_get(args.mp, args.agno); | |
3892 | ASSERT(args.pag); | |
3893 | ||
3894 | /* | |
3895 | * The freelist fixing code will decline the allocation if | |
3896 | * the size and shape of the free space doesn't allow for | |
3897 | * allocating the extent and updating all the metadata that | |
3898 | * happens during an allocation. We're remapping, not | |
3899 | * allocating, so skip that check by pretending to be freeing. | |
3900 | */ | |
3901 | error = xfs_alloc_fix_freelist(&args, XFS_ALLOC_FLAG_FREEING); | |
f65306ea DW |
3902 | xfs_perag_put(args.pag); |
3903 | if (error) | |
3904 | trace_xfs_bmap_remap_alloc_error(ap->ip, error, _RET_IP_); | |
3905 | return error; | |
3906 | } | |
3907 | ||
9e5987a7 DC |
3908 | /* |
3909 | * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. | |
3910 | * It figures out where to ask the underlying allocator to put the new extent. | |
3911 | */ | |
3912 | STATIC int | |
3913 | xfs_bmap_alloc( | |
68988114 | 3914 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
9e5987a7 | 3915 | { |
f65306ea DW |
3916 | if (ap->flags & XFS_BMAPI_REMAP) |
3917 | return xfs_bmap_remap_alloc(ap); | |
292378ed DC |
3918 | if (XFS_IS_REALTIME_INODE(ap->ip) && |
3919 | xfs_alloc_is_userdata(ap->datatype)) | |
9e5987a7 DC |
3920 | return xfs_bmap_rtalloc(ap); |
3921 | return xfs_bmap_btalloc(ap); | |
3922 | } | |
a5bd606b | 3923 | |
0a0af28c DW |
3924 | /* Trim extent to fit a logical block range. */ |
3925 | void | |
3926 | xfs_trim_extent( | |
3927 | struct xfs_bmbt_irec *irec, | |
3928 | xfs_fileoff_t bno, | |
3929 | xfs_filblks_t len) | |
3930 | { | |
3931 | xfs_fileoff_t distance; | |
3932 | xfs_fileoff_t end = bno + len; | |
3933 | ||
3934 | if (irec->br_startoff + irec->br_blockcount <= bno || | |
3935 | irec->br_startoff >= end) { | |
3936 | irec->br_blockcount = 0; | |
3937 | return; | |
3938 | } | |
3939 | ||
3940 | if (irec->br_startoff < bno) { | |
3941 | distance = bno - irec->br_startoff; | |
3942 | if (isnullstartblock(irec->br_startblock)) | |
3943 | irec->br_startblock = DELAYSTARTBLOCK; | |
3944 | if (irec->br_startblock != DELAYSTARTBLOCK && | |
3945 | irec->br_startblock != HOLESTARTBLOCK) | |
3946 | irec->br_startblock += distance; | |
3947 | irec->br_startoff += distance; | |
3948 | irec->br_blockcount -= distance; | |
3949 | } | |
3950 | ||
3951 | if (end < irec->br_startoff + irec->br_blockcount) { | |
3952 | distance = irec->br_startoff + irec->br_blockcount - end; | |
3953 | irec->br_blockcount -= distance; | |
3954 | } | |
3955 | } | |
3956 | ||
9e5987a7 DC |
3957 | /* |
3958 | * Trim the returned map to the required bounds | |
3959 | */ | |
3960 | STATIC void | |
3961 | xfs_bmapi_trim_map( | |
3962 | struct xfs_bmbt_irec *mval, | |
3963 | struct xfs_bmbt_irec *got, | |
3964 | xfs_fileoff_t *bno, | |
3965 | xfs_filblks_t len, | |
3966 | xfs_fileoff_t obno, | |
3967 | xfs_fileoff_t end, | |
3968 | int n, | |
3969 | int flags) | |
3970 | { | |
3971 | if ((flags & XFS_BMAPI_ENTIRE) || | |
3972 | got->br_startoff + got->br_blockcount <= obno) { | |
3973 | *mval = *got; | |
3974 | if (isnullstartblock(got->br_startblock)) | |
3975 | mval->br_startblock = DELAYSTARTBLOCK; | |
3976 | return; | |
3977 | } | |
7e47a4ef | 3978 | |
9e5987a7 DC |
3979 | if (obno > *bno) |
3980 | *bno = obno; | |
3981 | ASSERT((*bno >= obno) || (n == 0)); | |
3982 | ASSERT(*bno < end); | |
3983 | mval->br_startoff = *bno; | |
3984 | if (isnullstartblock(got->br_startblock)) | |
3985 | mval->br_startblock = DELAYSTARTBLOCK; | |
3986 | else | |
3987 | mval->br_startblock = got->br_startblock + | |
3988 | (*bno - got->br_startoff); | |
7e47a4ef | 3989 | /* |
9e5987a7 DC |
3990 | * Return the minimum of what we got and what we asked for for |
3991 | * the length. We can use the len variable here because it is | |
3992 | * modified below and we could have been there before coming | |
3993 | * here if the first part of the allocation didn't overlap what | |
3994 | * was asked for. | |
7e47a4ef | 3995 | */ |
9e5987a7 DC |
3996 | mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno, |
3997 | got->br_blockcount - (*bno - got->br_startoff)); | |
3998 | mval->br_state = got->br_state; | |
3999 | ASSERT(mval->br_blockcount <= len); | |
4000 | return; | |
7e47a4ef DC |
4001 | } |
4002 | ||
9e5987a7 DC |
4003 | /* |
4004 | * Update and validate the extent map to return | |
4005 | */ | |
4006 | STATIC void | |
4007 | xfs_bmapi_update_map( | |
4008 | struct xfs_bmbt_irec **map, | |
4009 | xfs_fileoff_t *bno, | |
4010 | xfs_filblks_t *len, | |
4011 | xfs_fileoff_t obno, | |
4012 | xfs_fileoff_t end, | |
4013 | int *n, | |
4014 | int flags) | |
e04426b9 | 4015 | { |
9e5987a7 | 4016 | xfs_bmbt_irec_t *mval = *map; |
e04426b9 | 4017 | |
9e5987a7 DC |
4018 | ASSERT((flags & XFS_BMAPI_ENTIRE) || |
4019 | ((mval->br_startoff + mval->br_blockcount) <= end)); | |
4020 | ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) || | |
4021 | (mval->br_startoff < obno)); | |
e04426b9 | 4022 | |
9e5987a7 DC |
4023 | *bno = mval->br_startoff + mval->br_blockcount; |
4024 | *len = end - *bno; | |
4025 | if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) { | |
4026 | /* update previous map with new information */ | |
4027 | ASSERT(mval->br_startblock == mval[-1].br_startblock); | |
4028 | ASSERT(mval->br_blockcount > mval[-1].br_blockcount); | |
4029 | ASSERT(mval->br_state == mval[-1].br_state); | |
4030 | mval[-1].br_blockcount = mval->br_blockcount; | |
4031 | mval[-1].br_state = mval->br_state; | |
4032 | } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK && | |
4033 | mval[-1].br_startblock != DELAYSTARTBLOCK && | |
4034 | mval[-1].br_startblock != HOLESTARTBLOCK && | |
4035 | mval->br_startblock == mval[-1].br_startblock + | |
4036 | mval[-1].br_blockcount && | |
4037 | ((flags & XFS_BMAPI_IGSTATE) || | |
4038 | mval[-1].br_state == mval->br_state)) { | |
4039 | ASSERT(mval->br_startoff == | |
4040 | mval[-1].br_startoff + mval[-1].br_blockcount); | |
4041 | mval[-1].br_blockcount += mval->br_blockcount; | |
4042 | } else if (*n > 0 && | |
4043 | mval->br_startblock == DELAYSTARTBLOCK && | |
4044 | mval[-1].br_startblock == DELAYSTARTBLOCK && | |
4045 | mval->br_startoff == | |
4046 | mval[-1].br_startoff + mval[-1].br_blockcount) { | |
4047 | mval[-1].br_blockcount += mval->br_blockcount; | |
4048 | mval[-1].br_state = mval->br_state; | |
4049 | } else if (!((*n == 0) && | |
4050 | ((mval->br_startoff + mval->br_blockcount) <= | |
4051 | obno))) { | |
4052 | mval++; | |
4053 | (*n)++; | |
4054 | } | |
4055 | *map = mval; | |
e04426b9 DC |
4056 | } |
4057 | ||
4058 | /* | |
9e5987a7 | 4059 | * Map file blocks to filesystem blocks without allocation. |
e04426b9 DC |
4060 | */ |
4061 | int | |
9e5987a7 DC |
4062 | xfs_bmapi_read( |
4063 | struct xfs_inode *ip, | |
4064 | xfs_fileoff_t bno, | |
b447fe5a | 4065 | xfs_filblks_t len, |
9e5987a7 DC |
4066 | struct xfs_bmbt_irec *mval, |
4067 | int *nmap, | |
c315c90b | 4068 | int flags) |
b447fe5a | 4069 | { |
9e5987a7 DC |
4070 | struct xfs_mount *mp = ip->i_mount; |
4071 | struct xfs_ifork *ifp; | |
4072 | struct xfs_bmbt_irec got; | |
9e5987a7 DC |
4073 | xfs_fileoff_t obno; |
4074 | xfs_fileoff_t end; | |
334f3423 | 4075 | xfs_extnum_t idx; |
9e5987a7 | 4076 | int error; |
334f3423 | 4077 | bool eof = false; |
9e5987a7 | 4078 | int n = 0; |
3993baeb | 4079 | int whichfork = xfs_bmapi_whichfork(flags); |
b447fe5a | 4080 | |
9e5987a7 DC |
4081 | ASSERT(*nmap >= 1); |
4082 | ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE| | |
3993baeb | 4083 | XFS_BMAPI_IGSTATE|XFS_BMAPI_COWFORK))); |
eef334e5 | 4084 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)); |
b447fe5a | 4085 | |
9e5987a7 DC |
4086 | if (unlikely(XFS_TEST_ERROR( |
4087 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
4088 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
4089 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
4090 | XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 4091 | return -EFSCORRUPTED; |
9e5987a7 | 4092 | } |
b447fe5a | 4093 | |
9e5987a7 | 4094 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4095 | return -EIO; |
9e5987a7 | 4096 | |
ff6d6af2 | 4097 | XFS_STATS_INC(mp, xs_blk_mapr); |
9e5987a7 DC |
4098 | |
4099 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4100 | ||
3993baeb DW |
4101 | /* No CoW fork? Return a hole. */ |
4102 | if (whichfork == XFS_COW_FORK && !ifp) { | |
4103 | mval->br_startoff = bno; | |
4104 | mval->br_startblock = HOLESTARTBLOCK; | |
4105 | mval->br_blockcount = len; | |
4106 | mval->br_state = XFS_EXT_NORM; | |
4107 | *nmap = 1; | |
4108 | return 0; | |
4109 | } | |
4110 | ||
9e5987a7 DC |
4111 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { |
4112 | error = xfs_iread_extents(NULL, ip, whichfork); | |
4113 | if (error) | |
4114 | return error; | |
b447fe5a | 4115 | } |
b447fe5a | 4116 | |
334f3423 CH |
4117 | if (!xfs_iext_lookup_extent(ip, ifp, bno, &idx, &got)) |
4118 | eof = true; | |
9e5987a7 DC |
4119 | end = bno + len; |
4120 | obno = bno; | |
b447fe5a | 4121 | |
9e5987a7 DC |
4122 | while (bno < end && n < *nmap) { |
4123 | /* Reading past eof, act as though there's a hole up to end. */ | |
4124 | if (eof) | |
4125 | got.br_startoff = end; | |
4126 | if (got.br_startoff > bno) { | |
4127 | /* Reading in a hole. */ | |
4128 | mval->br_startoff = bno; | |
4129 | mval->br_startblock = HOLESTARTBLOCK; | |
4130 | mval->br_blockcount = | |
4131 | XFS_FILBLKS_MIN(len, got.br_startoff - bno); | |
4132 | mval->br_state = XFS_EXT_NORM; | |
4133 | bno += mval->br_blockcount; | |
4134 | len -= mval->br_blockcount; | |
4135 | mval++; | |
4136 | n++; | |
4137 | continue; | |
4138 | } | |
b447fe5a | 4139 | |
9e5987a7 DC |
4140 | /* set up the extent map to return. */ |
4141 | xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); | |
4142 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); | |
4143 | ||
4144 | /* If we're done, stop now. */ | |
4145 | if (bno >= end || n >= *nmap) | |
4146 | break; | |
4147 | ||
4148 | /* Else go on to the next record. */ | |
334f3423 CH |
4149 | if (!xfs_iext_get_extent(ifp, ++idx, &got)) |
4150 | eof = true; | |
9e5987a7 DC |
4151 | } |
4152 | *nmap = n; | |
b447fe5a DC |
4153 | return 0; |
4154 | } | |
4155 | ||
51446f5b | 4156 | int |
9e5987a7 DC |
4157 | xfs_bmapi_reserve_delalloc( |
4158 | struct xfs_inode *ip, | |
be51f811 | 4159 | int whichfork, |
974ae922 | 4160 | xfs_fileoff_t off, |
9e5987a7 | 4161 | xfs_filblks_t len, |
974ae922 | 4162 | xfs_filblks_t prealloc, |
9e5987a7 | 4163 | struct xfs_bmbt_irec *got, |
9e5987a7 DC |
4164 | xfs_extnum_t *lastx, |
4165 | int eof) | |
1da177e4 | 4166 | { |
c0dc7828 | 4167 | struct xfs_mount *mp = ip->i_mount; |
be51f811 | 4168 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); |
9e5987a7 DC |
4169 | xfs_extlen_t alen; |
4170 | xfs_extlen_t indlen; | |
4171 | char rt = XFS_IS_REALTIME_INODE(ip); | |
4172 | xfs_extlen_t extsz; | |
4173 | int error; | |
974ae922 | 4174 | xfs_fileoff_t aoff = off; |
c0dc7828 | 4175 | |
974ae922 BF |
4176 | /* |
4177 | * Cap the alloc length. Keep track of prealloc so we know whether to | |
4178 | * tag the inode before we return. | |
4179 | */ | |
4180 | alen = XFS_FILBLKS_MIN(len + prealloc, MAXEXTLEN); | |
9e5987a7 DC |
4181 | if (!eof) |
4182 | alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff); | |
974ae922 BF |
4183 | if (prealloc && alen >= len) |
4184 | prealloc = alen - len; | |
1da177e4 | 4185 | |
9e5987a7 | 4186 | /* Figure out the extent size, adjust alen */ |
f7ca3522 DW |
4187 | if (whichfork == XFS_COW_FORK) |
4188 | extsz = xfs_get_cowextsz_hint(ip); | |
4189 | else | |
4190 | extsz = xfs_get_extsz_hint(ip); | |
9e5987a7 | 4191 | if (extsz) { |
65c5f419 CH |
4192 | struct xfs_bmbt_irec prev; |
4193 | ||
4194 | if (!xfs_iext_get_extent(ifp, *lastx - 1, &prev)) | |
4195 | prev.br_startoff = NULLFILEOFF; | |
4196 | ||
4197 | error = xfs_bmap_extsize_align(mp, got, &prev, extsz, rt, eof, | |
9e5987a7 DC |
4198 | 1, 0, &aoff, &alen); |
4199 | ASSERT(!error); | |
4200 | } | |
4201 | ||
4202 | if (rt) | |
4203 | extsz = alen / mp->m_sb.sb_rextsize; | |
4204 | ||
4205 | /* | |
4206 | * Make a transaction-less quota reservation for delayed allocation | |
4207 | * blocks. This number gets adjusted later. We return if we haven't | |
4208 | * allocated blocks already inside this loop. | |
4209 | */ | |
4210 | error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0, | |
4211 | rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); | |
4212 | if (error) | |
4213 | return error; | |
4214 | ||
4215 | /* | |
4216 | * Split changing sb for alen and indlen since they could be coming | |
4217 | * from different places. | |
4218 | */ | |
4219 | indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen); | |
4220 | ASSERT(indlen > 0); | |
4221 | ||
4222 | if (rt) { | |
bab98bbe | 4223 | error = xfs_mod_frextents(mp, -((int64_t)extsz)); |
9e5987a7 | 4224 | } else { |
0d485ada | 4225 | error = xfs_mod_fdblocks(mp, -((int64_t)alen), false); |
9e5987a7 DC |
4226 | } |
4227 | ||
4228 | if (error) | |
4229 | goto out_unreserve_quota; | |
4230 | ||
0d485ada | 4231 | error = xfs_mod_fdblocks(mp, -((int64_t)indlen), false); |
9e5987a7 DC |
4232 | if (error) |
4233 | goto out_unreserve_blocks; | |
4234 | ||
4235 | ||
4236 | ip->i_delayed_blks += alen; | |
4237 | ||
4238 | got->br_startoff = aoff; | |
4239 | got->br_startblock = nullstartblock(indlen); | |
4240 | got->br_blockcount = alen; | |
4241 | got->br_state = XFS_EXT_NORM; | |
be51f811 | 4242 | xfs_bmap_add_extent_hole_delay(ip, whichfork, lastx, got); |
9e5987a7 DC |
4243 | |
4244 | /* | |
4245 | * Update our extent pointer, given that xfs_bmap_add_extent_hole_delay | |
4246 | * might have merged it into one of the neighbouring ones. | |
4247 | */ | |
4248 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *lastx), got); | |
4249 | ||
974ae922 BF |
4250 | /* |
4251 | * Tag the inode if blocks were preallocated. Note that COW fork | |
4252 | * preallocation can occur at the start or end of the extent, even when | |
4253 | * prealloc == 0, so we must also check the aligned offset and length. | |
4254 | */ | |
4255 | if (whichfork == XFS_DATA_FORK && prealloc) | |
4256 | xfs_inode_set_eofblocks_tag(ip); | |
4257 | if (whichfork == XFS_COW_FORK && (prealloc || aoff < off || alen > len)) | |
4258 | xfs_inode_set_cowblocks_tag(ip); | |
4259 | ||
9e5987a7 DC |
4260 | ASSERT(got->br_startoff <= aoff); |
4261 | ASSERT(got->br_startoff + got->br_blockcount >= aoff + alen); | |
4262 | ASSERT(isnullstartblock(got->br_startblock)); | |
4263 | ASSERT(got->br_state == XFS_EXT_NORM); | |
4264 | return 0; | |
4265 | ||
4266 | out_unreserve_blocks: | |
4267 | if (rt) | |
bab98bbe | 4268 | xfs_mod_frextents(mp, extsz); |
9e5987a7 | 4269 | else |
0d485ada | 4270 | xfs_mod_fdblocks(mp, alen, false); |
9e5987a7 DC |
4271 | out_unreserve_quota: |
4272 | if (XFS_IS_QUOTA_ON(mp)) | |
4273 | xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ? | |
4274 | XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); | |
4275 | return error; | |
4276 | } | |
4277 | ||
cf11da9c DC |
4278 | static int |
4279 | xfs_bmapi_allocate( | |
9e5987a7 DC |
4280 | struct xfs_bmalloca *bma) |
4281 | { | |
4282 | struct xfs_mount *mp = bma->ip->i_mount; | |
60b4984f | 4283 | int whichfork = xfs_bmapi_whichfork(bma->flags); |
9e5987a7 DC |
4284 | struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); |
4285 | int tmp_logflags = 0; | |
4286 | int error; | |
9e5987a7 DC |
4287 | |
4288 | ASSERT(bma->length > 0); | |
4289 | ||
1da177e4 | 4290 | /* |
9e5987a7 DC |
4291 | * For the wasdelay case, we could also just allocate the stuff asked |
4292 | * for in this bmap call but that wouldn't be as good. | |
1da177e4 | 4293 | */ |
9e5987a7 DC |
4294 | if (bma->wasdel) { |
4295 | bma->length = (xfs_extlen_t)bma->got.br_blockcount; | |
4296 | bma->offset = bma->got.br_startoff; | |
0e8d630b | 4297 | if (bma->idx) { |
9e5987a7 DC |
4298 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), |
4299 | &bma->prev); | |
1da177e4 | 4300 | } |
9e5987a7 DC |
4301 | } else { |
4302 | bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN); | |
4303 | if (!bma->eof) | |
4304 | bma->length = XFS_FILBLKS_MIN(bma->length, | |
4305 | bma->got.br_startoff - bma->offset); | |
1da177e4 | 4306 | } |
1da177e4 | 4307 | |
9e5987a7 | 4308 | /* |
292378ed DC |
4309 | * Set the data type being allocated. For the data fork, the first data |
4310 | * in the file is treated differently to all other allocations. For the | |
4311 | * attribute fork, we only need to ensure the allocated range is not on | |
4312 | * the busy list. | |
9e5987a7 DC |
4313 | */ |
4314 | if (!(bma->flags & XFS_BMAPI_METADATA)) { | |
292378ed DC |
4315 | bma->datatype = XFS_ALLOC_NOBUSY; |
4316 | if (whichfork == XFS_DATA_FORK) { | |
4317 | if (bma->offset == 0) | |
4318 | bma->datatype |= XFS_ALLOC_INITIAL_USER_DATA; | |
4319 | else | |
4320 | bma->datatype |= XFS_ALLOC_USERDATA; | |
4321 | } | |
3fbbbea3 | 4322 | if (bma->flags & XFS_BMAPI_ZERO) |
292378ed | 4323 | bma->datatype |= XFS_ALLOC_USERDATA_ZERO; |
9e5987a7 | 4324 | } |
1da177e4 | 4325 | |
9e5987a7 | 4326 | bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1; |
0b1b213f | 4327 | |
9e5987a7 DC |
4328 | /* |
4329 | * Only want to do the alignment at the eof if it is userdata and | |
4330 | * allocation length is larger than a stripe unit. | |
4331 | */ | |
4332 | if (mp->m_dalign && bma->length >= mp->m_dalign && | |
4333 | !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) { | |
4334 | error = xfs_bmap_isaeof(bma, whichfork); | |
4335 | if (error) | |
4336 | return error; | |
1da177e4 | 4337 | } |
8096b1eb | 4338 | |
9e5987a7 DC |
4339 | error = xfs_bmap_alloc(bma); |
4340 | if (error) | |
1da177e4 | 4341 | return error; |
9e5987a7 | 4342 | |
2c3234d1 | 4343 | if (bma->dfops->dop_low) |
9e5987a7 DC |
4344 | bma->minleft = 0; |
4345 | if (bma->cur) | |
4346 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
4347 | if (bma->blkno == NULLFSBLOCK) | |
1da177e4 | 4348 | return 0; |
9e5987a7 DC |
4349 | if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { |
4350 | bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork); | |
4351 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
2c3234d1 | 4352 | bma->cur->bc_private.b.dfops = bma->dfops; |
1da177e4 | 4353 | } |
9e5987a7 DC |
4354 | /* |
4355 | * Bump the number of extents we've allocated | |
4356 | * in this call. | |
4357 | */ | |
4358 | bma->nallocs++; | |
4359 | ||
4360 | if (bma->cur) | |
4361 | bma->cur->bc_private.b.flags = | |
4362 | bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; | |
4363 | ||
4364 | bma->got.br_startoff = bma->offset; | |
4365 | bma->got.br_startblock = bma->blkno; | |
4366 | bma->got.br_blockcount = bma->length; | |
4367 | bma->got.br_state = XFS_EXT_NORM; | |
b4e9181e | 4368 | |
1da177e4 | 4369 | /* |
9e5987a7 DC |
4370 | * A wasdelay extent has been initialized, so shouldn't be flagged |
4371 | * as unwritten. | |
1da177e4 | 4372 | */ |
9e5987a7 DC |
4373 | if (!bma->wasdel && (bma->flags & XFS_BMAPI_PREALLOC) && |
4374 | xfs_sb_version_hasextflgbit(&mp->m_sb)) | |
4375 | bma->got.br_state = XFS_EXT_UNWRITTEN; | |
4376 | ||
4377 | if (bma->wasdel) | |
60b4984f | 4378 | error = xfs_bmap_add_extent_delay_real(bma, whichfork); |
9e5987a7 DC |
4379 | else |
4380 | error = xfs_bmap_add_extent_hole_real(bma, whichfork); | |
4381 | ||
4382 | bma->logflags |= tmp_logflags; | |
4383 | if (error) | |
4384 | return error; | |
4385 | ||
4386 | /* | |
4387 | * Update our extent pointer, given that xfs_bmap_add_extent_delay_real | |
4388 | * or xfs_bmap_add_extent_hole_real might have merged it into one of | |
4389 | * the neighbouring ones. | |
4390 | */ | |
4391 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); | |
4392 | ||
4393 | ASSERT(bma->got.br_startoff <= bma->offset); | |
4394 | ASSERT(bma->got.br_startoff + bma->got.br_blockcount >= | |
4395 | bma->offset + bma->length); | |
4396 | ASSERT(bma->got.br_state == XFS_EXT_NORM || | |
4397 | bma->got.br_state == XFS_EXT_UNWRITTEN); | |
4398 | return 0; | |
4399 | } | |
4400 | ||
9e5987a7 DC |
4401 | STATIC int |
4402 | xfs_bmapi_convert_unwritten( | |
4403 | struct xfs_bmalloca *bma, | |
4404 | struct xfs_bmbt_irec *mval, | |
4405 | xfs_filblks_t len, | |
4406 | int flags) | |
4407 | { | |
3993baeb | 4408 | int whichfork = xfs_bmapi_whichfork(flags); |
9e5987a7 DC |
4409 | struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); |
4410 | int tmp_logflags = 0; | |
4411 | int error; | |
4412 | ||
4413 | /* check if we need to do unwritten->real conversion */ | |
4414 | if (mval->br_state == XFS_EXT_UNWRITTEN && | |
4415 | (flags & XFS_BMAPI_PREALLOC)) | |
4416 | return 0; | |
4417 | ||
4418 | /* check if we need to do real->unwritten conversion */ | |
4419 | if (mval->br_state == XFS_EXT_NORM && | |
4420 | (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) != | |
4421 | (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) | |
4422 | return 0; | |
4423 | ||
3993baeb DW |
4424 | ASSERT(whichfork != XFS_COW_FORK); |
4425 | ||
9e5987a7 DC |
4426 | /* |
4427 | * Modify (by adding) the state flag, if writing. | |
4428 | */ | |
4429 | ASSERT(mval->br_blockcount <= len); | |
4430 | if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { | |
4431 | bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp, | |
4432 | bma->ip, whichfork); | |
4433 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
2c3234d1 | 4434 | bma->cur->bc_private.b.dfops = bma->dfops; |
1da177e4 | 4435 | } |
9e5987a7 DC |
4436 | mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN) |
4437 | ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN; | |
5575acc7 | 4438 | |
3fbbbea3 DC |
4439 | /* |
4440 | * Before insertion into the bmbt, zero the range being converted | |
4441 | * if required. | |
4442 | */ | |
4443 | if (flags & XFS_BMAPI_ZERO) { | |
4444 | error = xfs_zero_extent(bma->ip, mval->br_startblock, | |
4445 | mval->br_blockcount); | |
4446 | if (error) | |
4447 | return error; | |
4448 | } | |
4449 | ||
9e5987a7 | 4450 | error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, &bma->idx, |
2c3234d1 | 4451 | &bma->cur, mval, bma->firstblock, bma->dfops, |
9e5987a7 | 4452 | &tmp_logflags); |
2e588a46 BF |
4453 | /* |
4454 | * Log the inode core unconditionally in the unwritten extent conversion | |
4455 | * path because the conversion might not have done so (e.g., if the | |
4456 | * extent count hasn't changed). We need to make sure the inode is dirty | |
4457 | * in the transaction for the sake of fsync(), even if nothing has | |
4458 | * changed, because fsync() will not force the log for this transaction | |
4459 | * unless it sees the inode pinned. | |
4460 | */ | |
4461 | bma->logflags |= tmp_logflags | XFS_ILOG_CORE; | |
9e5987a7 DC |
4462 | if (error) |
4463 | return error; | |
4464 | ||
4465 | /* | |
4466 | * Update our extent pointer, given that | |
4467 | * xfs_bmap_add_extent_unwritten_real might have merged it into one | |
4468 | * of the neighbouring ones. | |
4469 | */ | |
4470 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); | |
4471 | ||
4472 | /* | |
4473 | * We may have combined previously unwritten space with written space, | |
4474 | * so generate another request. | |
4475 | */ | |
4476 | if (mval->br_blockcount < len) | |
2451337d | 4477 | return -EAGAIN; |
9e5987a7 DC |
4478 | return 0; |
4479 | } | |
4480 | ||
4481 | /* | |
4482 | * Map file blocks to filesystem blocks, and allocate blocks or convert the | |
4483 | * extent state if necessary. Details behaviour is controlled by the flags | |
4484 | * parameter. Only allocates blocks from a single allocation group, to avoid | |
4485 | * locking problems. | |
4486 | * | |
4487 | * The returned value in "firstblock" from the first call in a transaction | |
4488 | * must be remembered and presented to subsequent calls in "firstblock". | |
4489 | * An upper bound for the number of blocks to be allocated is supplied to | |
4490 | * the first call in "total"; if no allocation group has that many free | |
4491 | * blocks then the call will fail (return NULLFSBLOCK in "firstblock"). | |
4492 | */ | |
4493 | int | |
4494 | xfs_bmapi_write( | |
4495 | struct xfs_trans *tp, /* transaction pointer */ | |
4496 | struct xfs_inode *ip, /* incore inode */ | |
4497 | xfs_fileoff_t bno, /* starting file offs. mapped */ | |
4498 | xfs_filblks_t len, /* length to map in file */ | |
4499 | int flags, /* XFS_BMAPI_... */ | |
4500 | xfs_fsblock_t *firstblock, /* first allocated block | |
4501 | controls a.g. for allocs */ | |
4502 | xfs_extlen_t total, /* total blocks needed */ | |
4503 | struct xfs_bmbt_irec *mval, /* output: map values */ | |
4504 | int *nmap, /* i/o: mval size/count */ | |
2c3234d1 | 4505 | struct xfs_defer_ops *dfops) /* i/o: list extents to free */ |
9e5987a7 DC |
4506 | { |
4507 | struct xfs_mount *mp = ip->i_mount; | |
4508 | struct xfs_ifork *ifp; | |
a30b0367 | 4509 | struct xfs_bmalloca bma = { NULL }; /* args for xfs_bmap_alloc */ |
9e5987a7 | 4510 | xfs_fileoff_t end; /* end of mapped file region */ |
2d58f6ef | 4511 | bool eof = false; /* after the end of extents */ |
9e5987a7 DC |
4512 | int error; /* error return */ |
4513 | int n; /* current extent index */ | |
4514 | xfs_fileoff_t obno; /* old block number (offset) */ | |
4515 | int whichfork; /* data or attr fork */ | |
4516 | char inhole; /* current location is hole in file */ | |
4517 | char wasdelay; /* old extent was delayed */ | |
4518 | ||
4519 | #ifdef DEBUG | |
4520 | xfs_fileoff_t orig_bno; /* original block number value */ | |
4521 | int orig_flags; /* original flags arg value */ | |
4522 | xfs_filblks_t orig_len; /* original value of len arg */ | |
4523 | struct xfs_bmbt_irec *orig_mval; /* original value of mval */ | |
4524 | int orig_nmap; /* original value of *nmap */ | |
4525 | ||
4526 | orig_bno = bno; | |
4527 | orig_len = len; | |
4528 | orig_flags = flags; | |
4529 | orig_mval = mval; | |
4530 | orig_nmap = *nmap; | |
4531 | #endif | |
60b4984f | 4532 | whichfork = xfs_bmapi_whichfork(flags); |
9e5987a7 DC |
4533 | |
4534 | ASSERT(*nmap >= 1); | |
4535 | ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); | |
4536 | ASSERT(!(flags & XFS_BMAPI_IGSTATE)); | |
4537 | ASSERT(tp != NULL); | |
4538 | ASSERT(len > 0); | |
f3508bcd | 4539 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL); |
eef334e5 | 4540 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
f65306ea DW |
4541 | ASSERT(!(flags & XFS_BMAPI_REMAP) || whichfork == XFS_DATA_FORK); |
4542 | ASSERT(!(flags & XFS_BMAPI_PREALLOC) || !(flags & XFS_BMAPI_REMAP)); | |
4543 | ASSERT(!(flags & XFS_BMAPI_CONVERT) || !(flags & XFS_BMAPI_REMAP)); | |
60b4984f DW |
4544 | ASSERT(!(flags & XFS_BMAPI_PREALLOC) || whichfork != XFS_COW_FORK); |
4545 | ASSERT(!(flags & XFS_BMAPI_CONVERT) || whichfork != XFS_COW_FORK); | |
9e5987a7 | 4546 | |
3fbbbea3 DC |
4547 | /* zeroing is for currently only for data extents, not metadata */ |
4548 | ASSERT((flags & (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)) != | |
4549 | (XFS_BMAPI_METADATA | XFS_BMAPI_ZERO)); | |
4550 | /* | |
4551 | * we can allocate unwritten extents or pre-zero allocated blocks, | |
4552 | * but it makes no sense to do both at once. This would result in | |
4553 | * zeroing the unwritten extent twice, but it still being an | |
4554 | * unwritten extent.... | |
4555 | */ | |
4556 | ASSERT((flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)) != | |
4557 | (XFS_BMAPI_PREALLOC | XFS_BMAPI_ZERO)); | |
4558 | ||
9e5987a7 DC |
4559 | if (unlikely(XFS_TEST_ERROR( |
4560 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
f3508bcd | 4561 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), |
9e5987a7 DC |
4562 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { |
4563 | XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 4564 | return -EFSCORRUPTED; |
5575acc7 KD |
4565 | } |
4566 | ||
9e5987a7 | 4567 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4568 | return -EIO; |
9e5987a7 DC |
4569 | |
4570 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4571 | ||
ff6d6af2 | 4572 | XFS_STATS_INC(mp, xs_blk_mapw); |
9e5987a7 | 4573 | |
9e5987a7 DC |
4574 | if (*firstblock == NULLFSBLOCK) { |
4575 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE) | |
4576 | bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
4577 | else | |
4578 | bma.minleft = 1; | |
4579 | } else { | |
4580 | bma.minleft = 0; | |
4581 | } | |
4582 | ||
4583 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
4584 | error = xfs_iread_extents(tp, ip, whichfork); | |
4585 | if (error) | |
4586 | goto error0; | |
4587 | } | |
4588 | ||
9e5987a7 DC |
4589 | n = 0; |
4590 | end = bno + len; | |
4591 | obno = bno; | |
4592 | ||
2d58f6ef CH |
4593 | if (!xfs_iext_lookup_extent(ip, ifp, bno, &bma.idx, &bma.got)) |
4594 | eof = true; | |
4595 | if (!xfs_iext_get_extent(ifp, bma.idx - 1, &bma.prev)) | |
4596 | bma.prev.br_startoff = NULLFILEOFF; | |
9e5987a7 DC |
4597 | bma.tp = tp; |
4598 | bma.ip = ip; | |
4599 | bma.total = total; | |
292378ed | 4600 | bma.datatype = 0; |
2c3234d1 | 4601 | bma.dfops = dfops; |
9e5987a7 DC |
4602 | bma.firstblock = firstblock; |
4603 | ||
9e5987a7 DC |
4604 | while (bno < end && n < *nmap) { |
4605 | inhole = eof || bma.got.br_startoff > bno; | |
4606 | wasdelay = !inhole && isnullstartblock(bma.got.br_startblock); | |
4607 | ||
f65306ea DW |
4608 | /* |
4609 | * Make sure we only reflink into a hole. | |
4610 | */ | |
4611 | if (flags & XFS_BMAPI_REMAP) | |
4612 | ASSERT(inhole); | |
60b4984f DW |
4613 | if (flags & XFS_BMAPI_COWFORK) |
4614 | ASSERT(!inhole); | |
f65306ea | 4615 | |
1da177e4 | 4616 | /* |
9e5987a7 DC |
4617 | * First, deal with the hole before the allocated space |
4618 | * that we found, if any. | |
1da177e4 | 4619 | */ |
9e5987a7 DC |
4620 | if (inhole || wasdelay) { |
4621 | bma.eof = eof; | |
4622 | bma.conv = !!(flags & XFS_BMAPI_CONVERT); | |
4623 | bma.wasdel = wasdelay; | |
4624 | bma.offset = bno; | |
4625 | bma.flags = flags; | |
4626 | ||
1da177e4 | 4627 | /* |
9e5987a7 DC |
4628 | * There's a 32/64 bit type mismatch between the |
4629 | * allocation length request (which can be 64 bits in | |
4630 | * length) and the bma length request, which is | |
4631 | * xfs_extlen_t and therefore 32 bits. Hence we have to | |
4632 | * check for 32-bit overflows and handle them here. | |
1da177e4 | 4633 | */ |
9e5987a7 DC |
4634 | if (len > (xfs_filblks_t)MAXEXTLEN) |
4635 | bma.length = MAXEXTLEN; | |
4636 | else | |
4637 | bma.length = len; | |
4638 | ||
4639 | ASSERT(len > 0); | |
4640 | ASSERT(bma.length > 0); | |
4641 | error = xfs_bmapi_allocate(&bma); | |
1da177e4 LT |
4642 | if (error) |
4643 | goto error0; | |
9e5987a7 DC |
4644 | if (bma.blkno == NULLFSBLOCK) |
4645 | break; | |
174edb0e DW |
4646 | |
4647 | /* | |
4648 | * If this is a CoW allocation, record the data in | |
4649 | * the refcount btree for orphan recovery. | |
4650 | */ | |
4651 | if (whichfork == XFS_COW_FORK) { | |
4652 | error = xfs_refcount_alloc_cow_extent(mp, dfops, | |
4653 | bma.blkno, bma.length); | |
4654 | if (error) | |
4655 | goto error0; | |
4656 | } | |
1da177e4 | 4657 | } |
9e5987a7 DC |
4658 | |
4659 | /* Deal with the allocated space we found. */ | |
4660 | xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno, | |
4661 | end, n, flags); | |
4662 | ||
4663 | /* Execute unwritten extent conversion if necessary */ | |
4664 | error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags); | |
2451337d | 4665 | if (error == -EAGAIN) |
9e5987a7 DC |
4666 | continue; |
4667 | if (error) | |
4668 | goto error0; | |
4669 | ||
4670 | /* update the extent map to return */ | |
4671 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); | |
4672 | ||
4673 | /* | |
4674 | * If we're done, stop now. Stop when we've allocated | |
4675 | * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise | |
4676 | * the transaction may get too big. | |
4677 | */ | |
4678 | if (bno >= end || n >= *nmap || bma.nallocs >= *nmap) | |
4679 | break; | |
4680 | ||
4681 | /* Else go on to the next record. */ | |
4682 | bma.prev = bma.got; | |
2d58f6ef CH |
4683 | if (!xfs_iext_get_extent(ifp, ++bma.idx, &bma.got)) |
4684 | eof = true; | |
9e5987a7 DC |
4685 | } |
4686 | *nmap = n; | |
4687 | ||
4688 | /* | |
4689 | * Transform from btree to extents, give it cur. | |
4690 | */ | |
4691 | if (xfs_bmap_wants_extents(ip, whichfork)) { | |
4692 | int tmp_logflags = 0; | |
4693 | ||
4694 | ASSERT(bma.cur); | |
4695 | error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, | |
4696 | &tmp_logflags, whichfork); | |
4697 | bma.logflags |= tmp_logflags; | |
4698 | if (error) | |
4699 | goto error0; | |
4700 | } | |
4701 | ||
4702 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE || | |
4703 | XFS_IFORK_NEXTENTS(ip, whichfork) > | |
4704 | XFS_IFORK_MAXEXT(ip, whichfork)); | |
4705 | error = 0; | |
4706 | error0: | |
4707 | /* | |
4708 | * Log everything. Do this after conversion, there's no point in | |
4709 | * logging the extent records if we've converted to btree format. | |
4710 | */ | |
4711 | if ((bma.logflags & xfs_ilog_fext(whichfork)) && | |
4712 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
4713 | bma.logflags &= ~xfs_ilog_fext(whichfork); | |
4714 | else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) && | |
4715 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) | |
4716 | bma.logflags &= ~xfs_ilog_fbroot(whichfork); | |
4717 | /* | |
4718 | * Log whatever the flags say, even if error. Otherwise we might miss | |
4719 | * detecting a case where the data is changed, there's an error, | |
4720 | * and it's not logged so we don't shutdown when we should. | |
4721 | */ | |
4722 | if (bma.logflags) | |
4723 | xfs_trans_log_inode(tp, ip, bma.logflags); | |
4724 | ||
4725 | if (bma.cur) { | |
4726 | if (!error) { | |
4727 | ASSERT(*firstblock == NULLFSBLOCK || | |
4728 | XFS_FSB_TO_AGNO(mp, *firstblock) == | |
4729 | XFS_FSB_TO_AGNO(mp, | |
4730 | bma.cur->bc_private.b.firstblock) || | |
2c3234d1 | 4731 | (dfops->dop_low && |
9e5987a7 DC |
4732 | XFS_FSB_TO_AGNO(mp, *firstblock) < |
4733 | XFS_FSB_TO_AGNO(mp, | |
4734 | bma.cur->bc_private.b.firstblock))); | |
4735 | *firstblock = bma.cur->bc_private.b.firstblock; | |
1da177e4 | 4736 | } |
9e5987a7 DC |
4737 | xfs_btree_del_cursor(bma.cur, |
4738 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
4739 | } | |
4740 | if (!error) | |
4741 | xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, | |
4742 | orig_nmap, *nmap); | |
4743 | return error; | |
4744 | } | |
06d10dd9 | 4745 | |
a9bd24ac BF |
4746 | /* |
4747 | * When a delalloc extent is split (e.g., due to a hole punch), the original | |
4748 | * indlen reservation must be shared across the two new extents that are left | |
4749 | * behind. | |
4750 | * | |
4751 | * Given the original reservation and the worst case indlen for the two new | |
4752 | * extents (as calculated by xfs_bmap_worst_indlen()), split the original | |
d34999c9 BF |
4753 | * reservation fairly across the two new extents. If necessary, steal available |
4754 | * blocks from a deleted extent to make up a reservation deficiency (e.g., if | |
4755 | * ores == 1). The number of stolen blocks is returned. The availability and | |
4756 | * subsequent accounting of stolen blocks is the responsibility of the caller. | |
a9bd24ac | 4757 | */ |
d34999c9 | 4758 | static xfs_filblks_t |
a9bd24ac BF |
4759 | xfs_bmap_split_indlen( |
4760 | xfs_filblks_t ores, /* original res. */ | |
4761 | xfs_filblks_t *indlen1, /* ext1 worst indlen */ | |
d34999c9 BF |
4762 | xfs_filblks_t *indlen2, /* ext2 worst indlen */ |
4763 | xfs_filblks_t avail) /* stealable blocks */ | |
a9bd24ac BF |
4764 | { |
4765 | xfs_filblks_t len1 = *indlen1; | |
4766 | xfs_filblks_t len2 = *indlen2; | |
4767 | xfs_filblks_t nres = len1 + len2; /* new total res. */ | |
d34999c9 BF |
4768 | xfs_filblks_t stolen = 0; |
4769 | ||
4770 | /* | |
4771 | * Steal as many blocks as we can to try and satisfy the worst case | |
4772 | * indlen for both new extents. | |
4773 | */ | |
4774 | while (nres > ores && avail) { | |
4775 | nres--; | |
4776 | avail--; | |
4777 | stolen++; | |
4778 | } | |
a9bd24ac BF |
4779 | |
4780 | /* | |
d34999c9 BF |
4781 | * The only blocks available are those reserved for the original |
4782 | * extent and what we can steal from the extent being removed. | |
4783 | * If this still isn't enough to satisfy the combined | |
4784 | * requirements for the two new extents, skim blocks off of each | |
4785 | * of the new reservations until they match what is available. | |
a9bd24ac BF |
4786 | */ |
4787 | while (nres > ores) { | |
4788 | if (len1) { | |
4789 | len1--; | |
4790 | nres--; | |
4791 | } | |
4792 | if (nres == ores) | |
4793 | break; | |
4794 | if (len2) { | |
4795 | len2--; | |
4796 | nres--; | |
4797 | } | |
4798 | } | |
4799 | ||
4800 | *indlen1 = len1; | |
4801 | *indlen2 = len2; | |
d34999c9 BF |
4802 | |
4803 | return stolen; | |
a9bd24ac BF |
4804 | } |
4805 | ||
fa5c836c CH |
4806 | int |
4807 | xfs_bmap_del_extent_delay( | |
4808 | struct xfs_inode *ip, | |
4809 | int whichfork, | |
4810 | xfs_extnum_t *idx, | |
4811 | struct xfs_bmbt_irec *got, | |
4812 | struct xfs_bmbt_irec *del) | |
4813 | { | |
4814 | struct xfs_mount *mp = ip->i_mount; | |
4815 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
4816 | struct xfs_bmbt_irec new; | |
4817 | int64_t da_old, da_new, da_diff = 0; | |
4818 | xfs_fileoff_t del_endoff, got_endoff; | |
4819 | xfs_filblks_t got_indlen, new_indlen, stolen; | |
4820 | int error = 0, state = 0; | |
4821 | bool isrt; | |
4822 | ||
4823 | XFS_STATS_INC(mp, xs_del_exlist); | |
4824 | ||
4825 | isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); | |
4826 | del_endoff = del->br_startoff + del->br_blockcount; | |
4827 | got_endoff = got->br_startoff + got->br_blockcount; | |
4828 | da_old = startblockval(got->br_startblock); | |
4829 | da_new = 0; | |
4830 | ||
4831 | ASSERT(*idx >= 0); | |
5d829300 | 4832 | ASSERT(*idx <= xfs_iext_count(ifp)); |
fa5c836c CH |
4833 | ASSERT(del->br_blockcount > 0); |
4834 | ASSERT(got->br_startoff <= del->br_startoff); | |
4835 | ASSERT(got_endoff >= del_endoff); | |
4836 | ||
4837 | if (isrt) { | |
4838 | int64_t rtexts = XFS_FSB_TO_B(mp, del->br_blockcount); | |
4839 | ||
4840 | do_div(rtexts, mp->m_sb.sb_rextsize); | |
4841 | xfs_mod_frextents(mp, rtexts); | |
4842 | } | |
4843 | ||
4844 | /* | |
4845 | * Update the inode delalloc counter now and wait to update the | |
4846 | * sb counters as we might have to borrow some blocks for the | |
4847 | * indirect block accounting. | |
4848 | */ | |
4849 | xfs_trans_reserve_quota_nblks(NULL, ip, -((long)del->br_blockcount), 0, | |
4850 | isrt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); | |
4851 | ip->i_delayed_blks -= del->br_blockcount; | |
4852 | ||
4853 | if (whichfork == XFS_COW_FORK) | |
4854 | state |= BMAP_COWFORK; | |
4855 | ||
4856 | if (got->br_startoff == del->br_startoff) | |
4857 | state |= BMAP_LEFT_CONTIG; | |
4858 | if (got_endoff == del_endoff) | |
4859 | state |= BMAP_RIGHT_CONTIG; | |
4860 | ||
4861 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { | |
4862 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
4863 | /* | |
4864 | * Matches the whole extent. Delete the entry. | |
4865 | */ | |
4866 | xfs_iext_remove(ip, *idx, 1, state); | |
4867 | --*idx; | |
4868 | break; | |
4869 | case BMAP_LEFT_CONTIG: | |
4870 | /* | |
4871 | * Deleting the first part of the extent. | |
4872 | */ | |
4873 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4874 | got->br_startoff = del_endoff; | |
4875 | got->br_blockcount -= del->br_blockcount; | |
4876 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, | |
4877 | got->br_blockcount), da_old); | |
4878 | got->br_startblock = nullstartblock((int)da_new); | |
4879 | xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); | |
4880 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4881 | break; | |
4882 | case BMAP_RIGHT_CONTIG: | |
4883 | /* | |
4884 | * Deleting the last part of the extent. | |
4885 | */ | |
4886 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4887 | got->br_blockcount = got->br_blockcount - del->br_blockcount; | |
4888 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, | |
4889 | got->br_blockcount), da_old); | |
4890 | got->br_startblock = nullstartblock((int)da_new); | |
4891 | xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); | |
4892 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4893 | break; | |
4894 | case 0: | |
4895 | /* | |
4896 | * Deleting the middle of the extent. | |
4897 | * | |
4898 | * Distribute the original indlen reservation across the two new | |
4899 | * extents. Steal blocks from the deleted extent if necessary. | |
4900 | * Stealing blocks simply fudges the fdblocks accounting below. | |
4901 | * Warn if either of the new indlen reservations is zero as this | |
4902 | * can lead to delalloc problems. | |
4903 | */ | |
4904 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4905 | ||
4906 | got->br_blockcount = del->br_startoff - got->br_startoff; | |
4907 | got_indlen = xfs_bmap_worst_indlen(ip, got->br_blockcount); | |
4908 | ||
4909 | new.br_blockcount = got_endoff - del_endoff; | |
4910 | new_indlen = xfs_bmap_worst_indlen(ip, new.br_blockcount); | |
4911 | ||
4912 | WARN_ON_ONCE(!got_indlen || !new_indlen); | |
4913 | stolen = xfs_bmap_split_indlen(da_old, &got_indlen, &new_indlen, | |
4914 | del->br_blockcount); | |
4915 | ||
4916 | got->br_startblock = nullstartblock((int)got_indlen); | |
4917 | xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); | |
4918 | trace_xfs_bmap_post_update(ip, *idx, 0, _THIS_IP_); | |
4919 | ||
4920 | new.br_startoff = del_endoff; | |
4921 | new.br_state = got->br_state; | |
4922 | new.br_startblock = nullstartblock((int)new_indlen); | |
4923 | ||
4924 | ++*idx; | |
4925 | xfs_iext_insert(ip, *idx, 1, &new, state); | |
4926 | ||
4927 | da_new = got_indlen + new_indlen - stolen; | |
4928 | del->br_blockcount -= stolen; | |
4929 | break; | |
4930 | } | |
4931 | ||
4932 | ASSERT(da_old >= da_new); | |
4933 | da_diff = da_old - da_new; | |
4934 | if (!isrt) | |
4935 | da_diff += del->br_blockcount; | |
4936 | if (da_diff) | |
4937 | xfs_mod_fdblocks(mp, da_diff, false); | |
4938 | return error; | |
4939 | } | |
4940 | ||
4941 | void | |
4942 | xfs_bmap_del_extent_cow( | |
4943 | struct xfs_inode *ip, | |
4944 | xfs_extnum_t *idx, | |
4945 | struct xfs_bmbt_irec *got, | |
4946 | struct xfs_bmbt_irec *del) | |
4947 | { | |
4948 | struct xfs_mount *mp = ip->i_mount; | |
4949 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK); | |
4950 | struct xfs_bmbt_irec new; | |
4951 | xfs_fileoff_t del_endoff, got_endoff; | |
4952 | int state = BMAP_COWFORK; | |
4953 | ||
4954 | XFS_STATS_INC(mp, xs_del_exlist); | |
4955 | ||
4956 | del_endoff = del->br_startoff + del->br_blockcount; | |
4957 | got_endoff = got->br_startoff + got->br_blockcount; | |
4958 | ||
4959 | ASSERT(*idx >= 0); | |
5d829300 | 4960 | ASSERT(*idx <= xfs_iext_count(ifp)); |
fa5c836c CH |
4961 | ASSERT(del->br_blockcount > 0); |
4962 | ASSERT(got->br_startoff <= del->br_startoff); | |
4963 | ASSERT(got_endoff >= del_endoff); | |
4964 | ASSERT(!isnullstartblock(got->br_startblock)); | |
4965 | ||
4966 | if (got->br_startoff == del->br_startoff) | |
4967 | state |= BMAP_LEFT_CONTIG; | |
4968 | if (got_endoff == del_endoff) | |
4969 | state |= BMAP_RIGHT_CONTIG; | |
4970 | ||
4971 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { | |
4972 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
4973 | /* | |
4974 | * Matches the whole extent. Delete the entry. | |
4975 | */ | |
4976 | xfs_iext_remove(ip, *idx, 1, state); | |
4977 | --*idx; | |
4978 | break; | |
4979 | case BMAP_LEFT_CONTIG: | |
4980 | /* | |
4981 | * Deleting the first part of the extent. | |
4982 | */ | |
4983 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4984 | got->br_startoff = del_endoff; | |
4985 | got->br_blockcount -= del->br_blockcount; | |
4986 | got->br_startblock = del->br_startblock + del->br_blockcount; | |
4987 | xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); | |
4988 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4989 | break; | |
4990 | case BMAP_RIGHT_CONTIG: | |
4991 | /* | |
4992 | * Deleting the last part of the extent. | |
4993 | */ | |
4994 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4995 | got->br_blockcount -= del->br_blockcount; | |
4996 | xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); | |
4997 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4998 | break; | |
4999 | case 0: | |
5000 | /* | |
5001 | * Deleting the middle of the extent. | |
5002 | */ | |
5003 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
5004 | got->br_blockcount = del->br_startoff - got->br_startoff; | |
5005 | xfs_bmbt_set_all(xfs_iext_get_ext(ifp, *idx), got); | |
5006 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
5007 | ||
5008 | new.br_startoff = del_endoff; | |
5009 | new.br_blockcount = got_endoff - del_endoff; | |
5010 | new.br_state = got->br_state; | |
5011 | new.br_startblock = del->br_startblock + del->br_blockcount; | |
5012 | ||
5013 | ++*idx; | |
5014 | xfs_iext_insert(ip, *idx, 1, &new, state); | |
5015 | break; | |
5016 | } | |
5017 | } | |
5018 | ||
9e5987a7 DC |
5019 | /* |
5020 | * Called by xfs_bmapi to update file extent records and the btree | |
5021 | * after removing space (or undoing a delayed allocation). | |
5022 | */ | |
5023 | STATIC int /* error */ | |
5024 | xfs_bmap_del_extent( | |
5025 | xfs_inode_t *ip, /* incore inode pointer */ | |
5026 | xfs_trans_t *tp, /* current transaction pointer */ | |
5027 | xfs_extnum_t *idx, /* extent number to update/delete */ | |
2c3234d1 | 5028 | struct xfs_defer_ops *dfops, /* list of extents to be freed */ |
9e5987a7 DC |
5029 | xfs_btree_cur_t *cur, /* if null, not a btree */ |
5030 | xfs_bmbt_irec_t *del, /* data to remove from extents */ | |
5031 | int *logflagsp, /* inode logging flags */ | |
4847acf8 DW |
5032 | int whichfork, /* data or attr fork */ |
5033 | int bflags) /* bmapi flags */ | |
9e5987a7 DC |
5034 | { |
5035 | xfs_filblks_t da_new; /* new delay-alloc indirect blocks */ | |
5036 | xfs_filblks_t da_old; /* old delay-alloc indirect blocks */ | |
5037 | xfs_fsblock_t del_endblock=0; /* first block past del */ | |
5038 | xfs_fileoff_t del_endoff; /* first offset past del */ | |
5039 | int delay; /* current block is delayed allocated */ | |
5040 | int do_fx; /* free extent at end of routine */ | |
5041 | xfs_bmbt_rec_host_t *ep; /* current extent entry pointer */ | |
5042 | int error; /* error return value */ | |
5043 | int flags; /* inode logging flags */ | |
5044 | xfs_bmbt_irec_t got; /* current extent entry */ | |
5045 | xfs_fileoff_t got_endoff; /* first offset past got */ | |
5046 | int i; /* temp state */ | |
5047 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
5048 | xfs_mount_t *mp; /* mount structure */ | |
5049 | xfs_filblks_t nblks; /* quota/sb block count */ | |
5050 | xfs_bmbt_irec_t new; /* new record to be inserted */ | |
5051 | /* REFERENCED */ | |
5052 | uint qfield; /* quota field to update */ | |
5053 | xfs_filblks_t temp; /* for indirect length calculations */ | |
5054 | xfs_filblks_t temp2; /* for indirect length calculations */ | |
5055 | int state = 0; | |
5056 | ||
ff6d6af2 BD |
5057 | mp = ip->i_mount; |
5058 | XFS_STATS_INC(mp, xs_del_exlist); | |
9e5987a7 DC |
5059 | |
5060 | if (whichfork == XFS_ATTR_FORK) | |
5061 | state |= BMAP_ATTRFORK; | |
3993baeb DW |
5062 | else if (whichfork == XFS_COW_FORK) |
5063 | state |= BMAP_COWFORK; | |
9e5987a7 | 5064 | |
9e5987a7 | 5065 | ifp = XFS_IFORK_PTR(ip, whichfork); |
5d829300 | 5066 | ASSERT((*idx >= 0) && (*idx < xfs_iext_count(ifp))); |
9e5987a7 DC |
5067 | ASSERT(del->br_blockcount > 0); |
5068 | ep = xfs_iext_get_ext(ifp, *idx); | |
5069 | xfs_bmbt_get_all(ep, &got); | |
5070 | ASSERT(got.br_startoff <= del->br_startoff); | |
5071 | del_endoff = del->br_startoff + del->br_blockcount; | |
5072 | got_endoff = got.br_startoff + got.br_blockcount; | |
5073 | ASSERT(got_endoff >= del_endoff); | |
5074 | delay = isnullstartblock(got.br_startblock); | |
5075 | ASSERT(isnullstartblock(del->br_startblock) == delay); | |
5076 | flags = 0; | |
5077 | qfield = 0; | |
5078 | error = 0; | |
5079 | /* | |
5080 | * If deleting a real allocation, must free up the disk space. | |
5081 | */ | |
5082 | if (!delay) { | |
5083 | flags = XFS_ILOG_CORE; | |
5084 | /* | |
5085 | * Realtime allocation. Free it and record di_nblocks update. | |
5086 | */ | |
5087 | if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { | |
5088 | xfs_fsblock_t bno; | |
5089 | xfs_filblks_t len; | |
5090 | ||
5091 | ASSERT(do_mod(del->br_blockcount, | |
5092 | mp->m_sb.sb_rextsize) == 0); | |
5093 | ASSERT(do_mod(del->br_startblock, | |
5094 | mp->m_sb.sb_rextsize) == 0); | |
5095 | bno = del->br_startblock; | |
5096 | len = del->br_blockcount; | |
5097 | do_div(bno, mp->m_sb.sb_rextsize); | |
5098 | do_div(len, mp->m_sb.sb_rextsize); | |
5099 | error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); | |
5100 | if (error) | |
5101 | goto done; | |
5102 | do_fx = 0; | |
5103 | nblks = len * mp->m_sb.sb_rextsize; | |
5104 | qfield = XFS_TRANS_DQ_RTBCOUNT; | |
5105 | } | |
1da177e4 | 5106 | /* |
9e5987a7 | 5107 | * Ordinary allocation. |
1da177e4 | 5108 | */ |
9e5987a7 DC |
5109 | else { |
5110 | do_fx = 1; | |
5111 | nblks = del->br_blockcount; | |
5112 | qfield = XFS_TRANS_DQ_BCOUNT; | |
1da177e4 | 5113 | } |
1da177e4 | 5114 | /* |
9e5987a7 | 5115 | * Set up del_endblock and cur for later. |
1da177e4 | 5116 | */ |
9e5987a7 DC |
5117 | del_endblock = del->br_startblock + del->br_blockcount; |
5118 | if (cur) { | |
5119 | if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
5120 | got.br_startblock, got.br_blockcount, | |
5121 | &i))) | |
5122 | goto done; | |
c29aad41 | 5123 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 5124 | } |
9e5987a7 DC |
5125 | da_old = da_new = 0; |
5126 | } else { | |
5127 | da_old = startblockval(got.br_startblock); | |
5128 | da_new = 0; | |
5129 | nblks = 0; | |
5130 | do_fx = 0; | |
1da177e4 | 5131 | } |
340785cc | 5132 | |
1da177e4 | 5133 | /* |
9e5987a7 DC |
5134 | * Set flag value to use in switch statement. |
5135 | * Left-contig is 2, right-contig is 1. | |
1da177e4 | 5136 | */ |
9e5987a7 DC |
5137 | switch (((got.br_startoff == del->br_startoff) << 1) | |
5138 | (got_endoff == del_endoff)) { | |
5139 | case 3: | |
5140 | /* | |
5141 | * Matches the whole extent. Delete the entry. | |
5142 | */ | |
4862cfe8 | 5143 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
9e5987a7 DC |
5144 | xfs_iext_remove(ip, *idx, 1, |
5145 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0); | |
5146 | --*idx; | |
5147 | if (delay) | |
5148 | break; | |
5149 | ||
5150 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
5151 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
5152 | flags |= XFS_ILOG_CORE; | |
5153 | if (!cur) { | |
5154 | flags |= xfs_ilog_fext(whichfork); | |
5155 | break; | |
5156 | } | |
5157 | if ((error = xfs_btree_delete(cur, &i))) | |
5158 | goto done; | |
c29aad41 | 5159 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
5160 | break; |
5161 | ||
5162 | case 2: | |
5163 | /* | |
5164 | * Deleting the first part of the extent. | |
5165 | */ | |
5166 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
5167 | xfs_bmbt_set_startoff(ep, del_endoff); | |
5168 | temp = got.br_blockcount - del->br_blockcount; | |
5169 | xfs_bmbt_set_blockcount(ep, temp); | |
5170 | if (delay) { | |
5171 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
5172 | da_old); | |
5173 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
5174 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
5175 | da_new = temp; | |
5176 | break; | |
5177 | } | |
5178 | xfs_bmbt_set_startblock(ep, del_endblock); | |
5179 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
5180 | if (!cur) { | |
5181 | flags |= xfs_ilog_fext(whichfork); | |
5182 | break; | |
5183 | } | |
5184 | if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock, | |
5185 | got.br_blockcount - del->br_blockcount, | |
5186 | got.br_state))) | |
5187 | goto done; | |
5188 | break; | |
5189 | ||
5190 | case 1: | |
5191 | /* | |
5192 | * Deleting the last part of the extent. | |
5193 | */ | |
5194 | temp = got.br_blockcount - del->br_blockcount; | |
5195 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
5196 | xfs_bmbt_set_blockcount(ep, temp); | |
5197 | if (delay) { | |
5198 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
5199 | da_old); | |
5200 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
5201 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
5202 | da_new = temp; | |
5203 | break; | |
5204 | } | |
5205 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
5206 | if (!cur) { | |
5207 | flags |= xfs_ilog_fext(whichfork); | |
5208 | break; | |
5209 | } | |
5210 | if ((error = xfs_bmbt_update(cur, got.br_startoff, | |
5211 | got.br_startblock, | |
5212 | got.br_blockcount - del->br_blockcount, | |
5213 | got.br_state))) | |
5214 | goto done; | |
5215 | break; | |
5216 | ||
5217 | case 0: | |
5218 | /* | |
5219 | * Deleting the middle of the extent. | |
5220 | */ | |
5221 | temp = del->br_startoff - got.br_startoff; | |
5222 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
5223 | xfs_bmbt_set_blockcount(ep, temp); | |
5224 | new.br_startoff = del_endoff; | |
5225 | temp2 = got_endoff - del_endoff; | |
5226 | new.br_blockcount = temp2; | |
5227 | new.br_state = got.br_state; | |
5228 | if (!delay) { | |
5229 | new.br_startblock = del_endblock; | |
5230 | flags |= XFS_ILOG_CORE; | |
5231 | if (cur) { | |
5232 | if ((error = xfs_bmbt_update(cur, | |
5233 | got.br_startoff, | |
5234 | got.br_startblock, temp, | |
5235 | got.br_state))) | |
5236 | goto done; | |
5237 | if ((error = xfs_btree_increment(cur, 0, &i))) | |
5238 | goto done; | |
5239 | cur->bc_rec.b = new; | |
5240 | error = xfs_btree_insert(cur, &i); | |
2451337d | 5241 | if (error && error != -ENOSPC) |
9e5987a7 DC |
5242 | goto done; |
5243 | /* | |
5244 | * If get no-space back from btree insert, | |
5245 | * it tried a split, and we have a zero | |
5246 | * block reservation. | |
5247 | * Fix up our state and return the error. | |
5248 | */ | |
2451337d | 5249 | if (error == -ENOSPC) { |
9e5987a7 DC |
5250 | /* |
5251 | * Reset the cursor, don't trust | |
5252 | * it after any insert operation. | |
5253 | */ | |
5254 | if ((error = xfs_bmbt_lookup_eq(cur, | |
5255 | got.br_startoff, | |
5256 | got.br_startblock, | |
5257 | temp, &i))) | |
5258 | goto done; | |
c29aad41 ES |
5259 | XFS_WANT_CORRUPTED_GOTO(mp, |
5260 | i == 1, done); | |
9e5987a7 DC |
5261 | /* |
5262 | * Update the btree record back | |
5263 | * to the original value. | |
5264 | */ | |
5265 | if ((error = xfs_bmbt_update(cur, | |
5266 | got.br_startoff, | |
5267 | got.br_startblock, | |
5268 | got.br_blockcount, | |
5269 | got.br_state))) | |
5270 | goto done; | |
5271 | /* | |
5272 | * Reset the extent record back | |
5273 | * to the original value. | |
5274 | */ | |
5275 | xfs_bmbt_set_blockcount(ep, | |
5276 | got.br_blockcount); | |
5277 | flags = 0; | |
2451337d | 5278 | error = -ENOSPC; |
9e5987a7 DC |
5279 | goto done; |
5280 | } | |
c29aad41 | 5281 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
5282 | } else |
5283 | flags |= xfs_ilog_fext(whichfork); | |
5284 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
5285 | XFS_IFORK_NEXTENTS(ip, whichfork) + 1); | |
5286 | } else { | |
d34999c9 | 5287 | xfs_filblks_t stolen; |
9e5987a7 | 5288 | ASSERT(whichfork == XFS_DATA_FORK); |
a9bd24ac BF |
5289 | |
5290 | /* | |
5291 | * Distribute the original indlen reservation across the | |
d34999c9 BF |
5292 | * two new extents. Steal blocks from the deleted extent |
5293 | * if necessary. Stealing blocks simply fudges the | |
5294 | * fdblocks accounting in xfs_bunmapi(). | |
a9bd24ac BF |
5295 | */ |
5296 | temp = xfs_bmap_worst_indlen(ip, got.br_blockcount); | |
5297 | temp2 = xfs_bmap_worst_indlen(ip, new.br_blockcount); | |
d34999c9 BF |
5298 | stolen = xfs_bmap_split_indlen(da_old, &temp, &temp2, |
5299 | del->br_blockcount); | |
5300 | da_new = temp + temp2 - stolen; | |
5301 | del->br_blockcount -= stolen; | |
a9bd24ac BF |
5302 | |
5303 | /* | |
d34999c9 BF |
5304 | * Set the reservation for each extent. Warn if either |
5305 | * is zero as this can lead to delalloc problems. | |
a9bd24ac | 5306 | */ |
d34999c9 | 5307 | WARN_ON_ONCE(!temp || !temp2); |
9e5987a7 | 5308 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); |
9e5987a7 | 5309 | new.br_startblock = nullstartblock((int)temp2); |
9e5987a7 DC |
5310 | } |
5311 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
5312 | xfs_iext_insert(ip, *idx + 1, 1, &new, state); | |
5313 | ++*idx; | |
5314 | break; | |
1da177e4 | 5315 | } |
9c194644 DW |
5316 | |
5317 | /* remove reverse mapping */ | |
5318 | if (!delay) { | |
5319 | error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, del); | |
5320 | if (error) | |
5321 | goto done; | |
5322 | } | |
5323 | ||
1da177e4 | 5324 | /* |
9e5987a7 | 5325 | * If we need to, add to list of extents to delete. |
1da177e4 | 5326 | */ |
4847acf8 | 5327 | if (do_fx && !(bflags & XFS_BMAPI_REMAP)) { |
62aab20f DW |
5328 | if (xfs_is_reflink_inode(ip) && whichfork == XFS_DATA_FORK) { |
5329 | error = xfs_refcount_decrease_extent(mp, dfops, del); | |
5330 | if (error) | |
5331 | goto done; | |
5332 | } else | |
5333 | xfs_bmap_add_free(mp, dfops, del->br_startblock, | |
5334 | del->br_blockcount, NULL); | |
5335 | } | |
5336 | ||
1da177e4 | 5337 | /* |
9e5987a7 | 5338 | * Adjust inode # blocks in the file. |
1da177e4 | 5339 | */ |
9e5987a7 DC |
5340 | if (nblks) |
5341 | ip->i_d.di_nblocks -= nblks; | |
1da177e4 | 5342 | /* |
9e5987a7 | 5343 | * Adjust quota data. |
1da177e4 | 5344 | */ |
4847acf8 | 5345 | if (qfield && !(bflags & XFS_BMAPI_REMAP)) |
9e5987a7 DC |
5346 | xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks); |
5347 | ||
5348 | /* | |
5349 | * Account for change in delayed indirect blocks. | |
5350 | * Nothing to do for disk quota accounting here. | |
5351 | */ | |
5352 | ASSERT(da_old >= da_new); | |
0d485ada DC |
5353 | if (da_old > da_new) |
5354 | xfs_mod_fdblocks(mp, (int64_t)(da_old - da_new), false); | |
9e5987a7 DC |
5355 | done: |
5356 | *logflagsp = flags; | |
1da177e4 LT |
5357 | return error; |
5358 | } | |
5359 | ||
3bacbcd8 | 5360 | /* |
9e5987a7 DC |
5361 | * Unmap (remove) blocks from a file. |
5362 | * If nexts is nonzero then the number of extents to remove is limited to | |
5363 | * that value. If not all extents in the block range can be removed then | |
5364 | * *done is set. | |
3bacbcd8 | 5365 | */ |
9e5987a7 | 5366 | int /* error */ |
4453593b | 5367 | __xfs_bunmapi( |
9e5987a7 DC |
5368 | xfs_trans_t *tp, /* transaction pointer */ |
5369 | struct xfs_inode *ip, /* incore inode */ | |
5370 | xfs_fileoff_t bno, /* starting offset to unmap */ | |
4453593b | 5371 | xfs_filblks_t *rlen, /* i/o: amount remaining */ |
9e5987a7 DC |
5372 | int flags, /* misc flags */ |
5373 | xfs_extnum_t nexts, /* number of extents max */ | |
5374 | xfs_fsblock_t *firstblock, /* first allocated block | |
5375 | controls a.g. for allocs */ | |
4453593b | 5376 | struct xfs_defer_ops *dfops) /* i/o: deferred updates */ |
3bacbcd8 | 5377 | { |
9e5987a7 DC |
5378 | xfs_btree_cur_t *cur; /* bmap btree cursor */ |
5379 | xfs_bmbt_irec_t del; /* extent being deleted */ | |
9e5987a7 DC |
5380 | int error; /* error return value */ |
5381 | xfs_extnum_t extno; /* extent number in list */ | |
5382 | xfs_bmbt_irec_t got; /* current extent record */ | |
5af317c9 | 5383 | xfs_ifork_t *ifp; /* inode fork pointer */ |
9e5987a7 DC |
5384 | int isrt; /* freeing in rt area */ |
5385 | xfs_extnum_t lastx; /* last extent index used */ | |
5386 | int logflags; /* transaction logging flags */ | |
5387 | xfs_extlen_t mod; /* rt extent offset */ | |
5388 | xfs_mount_t *mp; /* mount structure */ | |
9e5987a7 DC |
5389 | xfs_fileoff_t start; /* first file offset deleted */ |
5390 | int tmp_logflags; /* partial logging flags */ | |
5391 | int wasdel; /* was a delayed alloc extent */ | |
5392 | int whichfork; /* data or attribute fork */ | |
5393 | xfs_fsblock_t sum; | |
4453593b | 5394 | xfs_filblks_t len = *rlen; /* length to unmap in file */ |
1da177e4 | 5395 | |
9e5987a7 | 5396 | trace_xfs_bunmap(ip, bno, len, flags, _RET_IP_); |
1da177e4 | 5397 | |
3993baeb DW |
5398 | whichfork = xfs_bmapi_whichfork(flags); |
5399 | ASSERT(whichfork != XFS_COW_FORK); | |
9e5987a7 DC |
5400 | ifp = XFS_IFORK_PTR(ip, whichfork); |
5401 | if (unlikely( | |
5402 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5403 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { | |
5404 | XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW, | |
5405 | ip->i_mount); | |
2451337d | 5406 | return -EFSCORRUPTED; |
1da177e4 | 5407 | } |
9e5987a7 DC |
5408 | mp = ip->i_mount; |
5409 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 5410 | return -EIO; |
1da177e4 | 5411 | |
eef334e5 | 5412 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
9e5987a7 DC |
5413 | ASSERT(len > 0); |
5414 | ASSERT(nexts >= 0); | |
1da177e4 | 5415 | |
9e5987a7 DC |
5416 | if (!(ifp->if_flags & XFS_IFEXTENTS) && |
5417 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
5418 | return error; | |
5d829300 | 5419 | if (xfs_iext_count(ifp) == 0) { |
4453593b | 5420 | *rlen = 0; |
9e5987a7 DC |
5421 | return 0; |
5422 | } | |
ff6d6af2 | 5423 | XFS_STATS_INC(mp, xs_blk_unmap); |
9e5987a7 DC |
5424 | isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); |
5425 | start = bno; | |
5426 | bno = start + len - 1; | |
1da177e4 | 5427 | |
9e5987a7 DC |
5428 | /* |
5429 | * Check to see if the given block number is past the end of the | |
5430 | * file, back up to the last block if so... | |
5431 | */ | |
7efc7945 CH |
5432 | if (!xfs_iext_lookup_extent(ip, ifp, bno, &lastx, &got)) { |
5433 | ASSERT(lastx > 0); | |
5434 | xfs_iext_get_extent(ifp, --lastx, &got); | |
9e5987a7 DC |
5435 | bno = got.br_startoff + got.br_blockcount - 1; |
5436 | } | |
7efc7945 | 5437 | |
9e5987a7 DC |
5438 | logflags = 0; |
5439 | if (ifp->if_flags & XFS_IFBROOT) { | |
5440 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
5441 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
5442 | cur->bc_private.b.firstblock = *firstblock; | |
2c3234d1 | 5443 | cur->bc_private.b.dfops = dfops; |
9e5987a7 DC |
5444 | cur->bc_private.b.flags = 0; |
5445 | } else | |
5446 | cur = NULL; | |
5447 | ||
5448 | if (isrt) { | |
5449 | /* | |
5450 | * Synchronize by locking the bitmap inode. | |
5451 | */ | |
f4a0660d | 5452 | xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL|XFS_ILOCK_RTBITMAP); |
9e5987a7 | 5453 | xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); |
f4a0660d DW |
5454 | xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL|XFS_ILOCK_RTSUM); |
5455 | xfs_trans_ijoin(tp, mp->m_rsumip, XFS_ILOCK_EXCL); | |
9e5987a7 | 5456 | } |
58e20770 | 5457 | |
9e5987a7 DC |
5458 | extno = 0; |
5459 | while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 && | |
5460 | (nexts == 0 || extno < nexts)) { | |
5461 | /* | |
5462 | * Is the found extent after a hole in which bno lives? | |
5463 | * Just back up to the previous extent, if so. | |
5464 | */ | |
5465 | if (got.br_startoff > bno) { | |
5466 | if (--lastx < 0) | |
5467 | break; | |
7efc7945 | 5468 | xfs_iext_get_extent(ifp, lastx, &got); |
9e5987a7 DC |
5469 | } |
5470 | /* | |
5471 | * Is the last block of this extent before the range | |
5472 | * we're supposed to delete? If so, we're done. | |
5473 | */ | |
5474 | bno = XFS_FILEOFF_MIN(bno, | |
5475 | got.br_startoff + got.br_blockcount - 1); | |
5476 | if (bno < start) | |
5477 | break; | |
5478 | /* | |
5479 | * Then deal with the (possibly delayed) allocated space | |
5480 | * we found. | |
5481 | */ | |
9e5987a7 DC |
5482 | del = got; |
5483 | wasdel = isnullstartblock(del.br_startblock); | |
5484 | if (got.br_startoff < start) { | |
5485 | del.br_startoff = start; | |
5486 | del.br_blockcount -= start - got.br_startoff; | |
5487 | if (!wasdel) | |
5488 | del.br_startblock += start - got.br_startoff; | |
5489 | } | |
5490 | if (del.br_startoff + del.br_blockcount > bno + 1) | |
5491 | del.br_blockcount = bno + 1 - del.br_startoff; | |
5492 | sum = del.br_startblock + del.br_blockcount; | |
5493 | if (isrt && | |
5494 | (mod = do_mod(sum, mp->m_sb.sb_rextsize))) { | |
58e20770 | 5495 | /* |
9e5987a7 DC |
5496 | * Realtime extent not lined up at the end. |
5497 | * The extent could have been split into written | |
5498 | * and unwritten pieces, or we could just be | |
5499 | * unmapping part of it. But we can't really | |
5500 | * get rid of part of a realtime extent. | |
58e20770 | 5501 | */ |
9e5987a7 DC |
5502 | if (del.br_state == XFS_EXT_UNWRITTEN || |
5503 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { | |
5504 | /* | |
5505 | * This piece is unwritten, or we're not | |
5506 | * using unwritten extents. Skip over it. | |
5507 | */ | |
5508 | ASSERT(bno >= mod); | |
5509 | bno -= mod > del.br_blockcount ? | |
5510 | del.br_blockcount : mod; | |
5511 | if (bno < got.br_startoff) { | |
5512 | if (--lastx >= 0) | |
5513 | xfs_bmbt_get_all(xfs_iext_get_ext( | |
5514 | ifp, lastx), &got); | |
5515 | } | |
5516 | continue; | |
1da177e4 | 5517 | } |
9af25465 | 5518 | /* |
9e5987a7 DC |
5519 | * It's written, turn it unwritten. |
5520 | * This is better than zeroing it. | |
9af25465 | 5521 | */ |
9e5987a7 | 5522 | ASSERT(del.br_state == XFS_EXT_NORM); |
a7e5d03b | 5523 | ASSERT(tp->t_blk_res > 0); |
9e5987a7 DC |
5524 | /* |
5525 | * If this spans a realtime extent boundary, | |
5526 | * chop it back to the start of the one we end at. | |
5527 | */ | |
5528 | if (del.br_blockcount > mod) { | |
5529 | del.br_startoff += del.br_blockcount - mod; | |
5530 | del.br_startblock += del.br_blockcount - mod; | |
5531 | del.br_blockcount = mod; | |
5532 | } | |
5533 | del.br_state = XFS_EXT_UNWRITTEN; | |
5534 | error = xfs_bmap_add_extent_unwritten_real(tp, ip, | |
2c3234d1 | 5535 | &lastx, &cur, &del, firstblock, dfops, |
9e5987a7 DC |
5536 | &logflags); |
5537 | if (error) | |
5538 | goto error0; | |
5539 | goto nodelete; | |
5540 | } | |
5541 | if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) { | |
5542 | /* | |
5543 | * Realtime extent is lined up at the end but not | |
5544 | * at the front. We'll get rid of full extents if | |
5545 | * we can. | |
5546 | */ | |
5547 | mod = mp->m_sb.sb_rextsize - mod; | |
5548 | if (del.br_blockcount > mod) { | |
5549 | del.br_blockcount -= mod; | |
5550 | del.br_startoff += mod; | |
5551 | del.br_startblock += mod; | |
5552 | } else if ((del.br_startoff == start && | |
5553 | (del.br_state == XFS_EXT_UNWRITTEN || | |
a7e5d03b | 5554 | tp->t_blk_res == 0)) || |
9e5987a7 DC |
5555 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
5556 | /* | |
5557 | * Can't make it unwritten. There isn't | |
5558 | * a full extent here so just skip it. | |
5559 | */ | |
5560 | ASSERT(bno >= del.br_blockcount); | |
5561 | bno -= del.br_blockcount; | |
7efc7945 CH |
5562 | if (got.br_startoff > bno && --lastx >= 0) |
5563 | xfs_iext_get_extent(ifp, lastx, &got); | |
9af25465 | 5564 | continue; |
9e5987a7 | 5565 | } else if (del.br_state == XFS_EXT_UNWRITTEN) { |
7efc7945 CH |
5566 | struct xfs_bmbt_irec prev; |
5567 | ||
9e5987a7 DC |
5568 | /* |
5569 | * This one is already unwritten. | |
5570 | * It must have a written left neighbor. | |
5571 | * Unwrite the killed part of that one and | |
5572 | * try again. | |
5573 | */ | |
5574 | ASSERT(lastx > 0); | |
7efc7945 | 5575 | xfs_iext_get_extent(ifp, lastx - 1, &prev); |
9e5987a7 DC |
5576 | ASSERT(prev.br_state == XFS_EXT_NORM); |
5577 | ASSERT(!isnullstartblock(prev.br_startblock)); | |
5578 | ASSERT(del.br_startblock == | |
5579 | prev.br_startblock + prev.br_blockcount); | |
5580 | if (prev.br_startoff < start) { | |
5581 | mod = start - prev.br_startoff; | |
5582 | prev.br_blockcount -= mod; | |
5583 | prev.br_startblock += mod; | |
5584 | prev.br_startoff = start; | |
5585 | } | |
5586 | prev.br_state = XFS_EXT_UNWRITTEN; | |
5587 | lastx--; | |
5588 | error = xfs_bmap_add_extent_unwritten_real(tp, | |
5589 | ip, &lastx, &cur, &prev, | |
2c3234d1 | 5590 | firstblock, dfops, &logflags); |
9e5987a7 DC |
5591 | if (error) |
5592 | goto error0; | |
5593 | goto nodelete; | |
5594 | } else { | |
5595 | ASSERT(del.br_state == XFS_EXT_NORM); | |
5596 | del.br_state = XFS_EXT_UNWRITTEN; | |
5597 | error = xfs_bmap_add_extent_unwritten_real(tp, | |
5598 | ip, &lastx, &cur, &del, | |
2c3234d1 | 5599 | firstblock, dfops, &logflags); |
9e5987a7 DC |
5600 | if (error) |
5601 | goto error0; | |
5602 | goto nodelete; | |
9af25465 | 5603 | } |
1da177e4 | 5604 | } |
1da177e4 | 5605 | |
9e5987a7 DC |
5606 | /* |
5607 | * If it's the case where the directory code is running | |
5608 | * with no block reservation, and the deleted block is in | |
5609 | * the middle of its extent, and the resulting insert | |
5610 | * of an extent would cause transformation to btree format, | |
5611 | * then reject it. The calling code will then swap | |
5612 | * blocks around instead. | |
5613 | * We have to do this now, rather than waiting for the | |
5614 | * conversion to btree format, since the transaction | |
5615 | * will be dirty. | |
5616 | */ | |
a7e5d03b | 5617 | if (!wasdel && tp->t_blk_res == 0 && |
9e5987a7 DC |
5618 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && |
5619 | XFS_IFORK_NEXTENTS(ip, whichfork) >= /* Note the >= */ | |
5620 | XFS_IFORK_MAXEXT(ip, whichfork) && | |
5621 | del.br_startoff > got.br_startoff && | |
5622 | del.br_startoff + del.br_blockcount < | |
5623 | got.br_startoff + got.br_blockcount) { | |
2451337d | 5624 | error = -ENOSPC; |
9e5987a7 | 5625 | goto error0; |
1da177e4 | 5626 | } |
b2706a05 BF |
5627 | |
5628 | /* | |
5629 | * Unreserve quota and update realtime free space, if | |
5630 | * appropriate. If delayed allocation, update the inode delalloc | |
5631 | * counter now and wait to update the sb counters as | |
5632 | * xfs_bmap_del_extent() might need to borrow some blocks. | |
5633 | */ | |
5634 | if (wasdel) { | |
5635 | ASSERT(startblockval(del.br_startblock) > 0); | |
5636 | if (isrt) { | |
5637 | xfs_filblks_t rtexts; | |
5638 | ||
5639 | rtexts = XFS_FSB_TO_B(mp, del.br_blockcount); | |
5640 | do_div(rtexts, mp->m_sb.sb_rextsize); | |
5641 | xfs_mod_frextents(mp, (int64_t)rtexts); | |
5642 | (void)xfs_trans_reserve_quota_nblks(NULL, | |
5643 | ip, -((long)del.br_blockcount), 0, | |
5644 | XFS_QMOPT_RES_RTBLKS); | |
5645 | } else { | |
5646 | (void)xfs_trans_reserve_quota_nblks(NULL, | |
5647 | ip, -((long)del.br_blockcount), 0, | |
5648 | XFS_QMOPT_RES_REGBLKS); | |
5649 | } | |
5650 | ip->i_delayed_blks -= del.br_blockcount; | |
5651 | if (cur) | |
5652 | cur->bc_private.b.flags |= | |
5653 | XFS_BTCUR_BPRV_WASDEL; | |
5654 | } else if (cur) | |
5655 | cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL; | |
5656 | ||
2c3234d1 | 5657 | error = xfs_bmap_del_extent(ip, tp, &lastx, dfops, cur, &del, |
4847acf8 | 5658 | &tmp_logflags, whichfork, flags); |
9e5987a7 DC |
5659 | logflags |= tmp_logflags; |
5660 | if (error) | |
5661 | goto error0; | |
b2706a05 BF |
5662 | |
5663 | if (!isrt && wasdel) | |
5664 | xfs_mod_fdblocks(mp, (int64_t)del.br_blockcount, false); | |
5665 | ||
9e5987a7 DC |
5666 | bno = del.br_startoff - 1; |
5667 | nodelete: | |
1da177e4 | 5668 | /* |
9e5987a7 | 5669 | * If not done go on to the next (previous) record. |
1da177e4 | 5670 | */ |
9e5987a7 DC |
5671 | if (bno != (xfs_fileoff_t)-1 && bno >= start) { |
5672 | if (lastx >= 0) { | |
7efc7945 CH |
5673 | xfs_iext_get_extent(ifp, lastx, &got); |
5674 | if (got.br_startoff > bno && --lastx >= 0) | |
5675 | xfs_iext_get_extent(ifp, lastx, &got); | |
1da177e4 | 5676 | } |
9e5987a7 | 5677 | extno++; |
1da177e4 LT |
5678 | } |
5679 | } | |
4453593b DW |
5680 | if (bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0) |
5681 | *rlen = 0; | |
5682 | else | |
5683 | *rlen = bno - start + 1; | |
576039cf | 5684 | |
1da177e4 | 5685 | /* |
9e5987a7 | 5686 | * Convert to a btree if necessary. |
1da177e4 | 5687 | */ |
9e5987a7 DC |
5688 | if (xfs_bmap_needs_btree(ip, whichfork)) { |
5689 | ASSERT(cur == NULL); | |
2c3234d1 | 5690 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, dfops, |
9e5987a7 DC |
5691 | &cur, 0, &tmp_logflags, whichfork); |
5692 | logflags |= tmp_logflags; | |
5693 | if (error) | |
5694 | goto error0; | |
1da177e4 | 5695 | } |
1da177e4 | 5696 | /* |
9e5987a7 | 5697 | * transform from btree to extents, give it cur |
1da177e4 | 5698 | */ |
9e5987a7 DC |
5699 | else if (xfs_bmap_wants_extents(ip, whichfork)) { |
5700 | ASSERT(cur != NULL); | |
5701 | error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags, | |
5702 | whichfork); | |
5703 | logflags |= tmp_logflags; | |
5704 | if (error) | |
5705 | goto error0; | |
5706 | } | |
1da177e4 | 5707 | /* |
9e5987a7 | 5708 | * transform from extents to local? |
1da177e4 | 5709 | */ |
9e5987a7 DC |
5710 | error = 0; |
5711 | error0: | |
5712 | /* | |
5713 | * Log everything. Do this after conversion, there's no point in | |
5714 | * logging the extent records if we've converted to btree format. | |
5715 | */ | |
5716 | if ((logflags & xfs_ilog_fext(whichfork)) && | |
5717 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
5718 | logflags &= ~xfs_ilog_fext(whichfork); | |
5719 | else if ((logflags & xfs_ilog_fbroot(whichfork)) && | |
5720 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) | |
5721 | logflags &= ~xfs_ilog_fbroot(whichfork); | |
5722 | /* | |
5723 | * Log inode even in the error case, if the transaction | |
5724 | * is dirty we'll need to shut down the filesystem. | |
5725 | */ | |
5726 | if (logflags) | |
5727 | xfs_trans_log_inode(tp, ip, logflags); | |
5728 | if (cur) { | |
5729 | if (!error) { | |
5730 | *firstblock = cur->bc_private.b.firstblock; | |
5731 | cur->bc_private.b.allocated = 0; | |
5732 | } | |
5733 | xfs_btree_del_cursor(cur, | |
5734 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
5735 | } | |
5736 | return error; | |
5737 | } | |
e1d8fb88 | 5738 | |
4453593b DW |
5739 | /* Unmap a range of a file. */ |
5740 | int | |
5741 | xfs_bunmapi( | |
5742 | xfs_trans_t *tp, | |
5743 | struct xfs_inode *ip, | |
5744 | xfs_fileoff_t bno, | |
5745 | xfs_filblks_t len, | |
5746 | int flags, | |
5747 | xfs_extnum_t nexts, | |
5748 | xfs_fsblock_t *firstblock, | |
5749 | struct xfs_defer_ops *dfops, | |
5750 | int *done) | |
5751 | { | |
5752 | int error; | |
5753 | ||
5754 | error = __xfs_bunmapi(tp, ip, bno, &len, flags, nexts, firstblock, | |
5755 | dfops); | |
5756 | *done = (len == 0); | |
5757 | return error; | |
5758 | } | |
5759 | ||
ddb19e31 BF |
5760 | /* |
5761 | * Determine whether an extent shift can be accomplished by a merge with the | |
5762 | * extent that precedes the target hole of the shift. | |
5763 | */ | |
5764 | STATIC bool | |
5765 | xfs_bmse_can_merge( | |
5766 | struct xfs_bmbt_irec *left, /* preceding extent */ | |
5767 | struct xfs_bmbt_irec *got, /* current extent to shift */ | |
5768 | xfs_fileoff_t shift) /* shift fsb */ | |
5769 | { | |
5770 | xfs_fileoff_t startoff; | |
5771 | ||
5772 | startoff = got->br_startoff - shift; | |
5773 | ||
5774 | /* | |
5775 | * The extent, once shifted, must be adjacent in-file and on-disk with | |
5776 | * the preceding extent. | |
5777 | */ | |
5778 | if ((left->br_startoff + left->br_blockcount != startoff) || | |
5779 | (left->br_startblock + left->br_blockcount != got->br_startblock) || | |
5780 | (left->br_state != got->br_state) || | |
5781 | (left->br_blockcount + got->br_blockcount > MAXEXTLEN)) | |
5782 | return false; | |
5783 | ||
5784 | return true; | |
5785 | } | |
5786 | ||
5787 | /* | |
5788 | * A bmap extent shift adjusts the file offset of an extent to fill a preceding | |
5789 | * hole in the file. If an extent shift would result in the extent being fully | |
5790 | * adjacent to the extent that currently precedes the hole, we can merge with | |
5791 | * the preceding extent rather than do the shift. | |
5792 | * | |
5793 | * This function assumes the caller has verified a shift-by-merge is possible | |
5794 | * with the provided extents via xfs_bmse_can_merge(). | |
5795 | */ | |
5796 | STATIC int | |
5797 | xfs_bmse_merge( | |
5798 | struct xfs_inode *ip, | |
5799 | int whichfork, | |
5800 | xfs_fileoff_t shift, /* shift fsb */ | |
5801 | int current_ext, /* idx of gotp */ | |
5802 | struct xfs_bmbt_rec_host *gotp, /* extent to shift */ | |
5803 | struct xfs_bmbt_rec_host *leftp, /* preceding extent */ | |
5804 | struct xfs_btree_cur *cur, | |
5805 | int *logflags) /* output */ | |
5806 | { | |
ddb19e31 BF |
5807 | struct xfs_bmbt_irec got; |
5808 | struct xfs_bmbt_irec left; | |
5809 | xfs_filblks_t blockcount; | |
5810 | int error, i; | |
5fb5aeee | 5811 | struct xfs_mount *mp = ip->i_mount; |
ddb19e31 | 5812 | |
ddb19e31 BF |
5813 | xfs_bmbt_get_all(gotp, &got); |
5814 | xfs_bmbt_get_all(leftp, &left); | |
5815 | blockcount = left.br_blockcount + got.br_blockcount; | |
5816 | ||
5817 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); | |
5818 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
5819 | ASSERT(xfs_bmse_can_merge(&left, &got, shift)); | |
5820 | ||
5821 | /* | |
5822 | * Merge the in-core extents. Note that the host record pointers and | |
5823 | * current_ext index are invalid once the extent has been removed via | |
5824 | * xfs_iext_remove(). | |
5825 | */ | |
5826 | xfs_bmbt_set_blockcount(leftp, blockcount); | |
5827 | xfs_iext_remove(ip, current_ext, 1, 0); | |
5828 | ||
5829 | /* | |
5830 | * Update the on-disk extent count, the btree if necessary and log the | |
5831 | * inode. | |
5832 | */ | |
5833 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
5834 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
5835 | *logflags |= XFS_ILOG_CORE; | |
5836 | if (!cur) { | |
5837 | *logflags |= XFS_ILOG_DEXT; | |
5838 | return 0; | |
5839 | } | |
5840 | ||
5841 | /* lookup and remove the extent to merge */ | |
5842 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock, | |
5843 | got.br_blockcount, &i); | |
5844 | if (error) | |
4db431f5 | 5845 | return error; |
5fb5aeee | 5846 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
ddb19e31 BF |
5847 | |
5848 | error = xfs_btree_delete(cur, &i); | |
5849 | if (error) | |
4db431f5 | 5850 | return error; |
5fb5aeee | 5851 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
ddb19e31 BF |
5852 | |
5853 | /* lookup and update size of the previous extent */ | |
5854 | error = xfs_bmbt_lookup_eq(cur, left.br_startoff, left.br_startblock, | |
5855 | left.br_blockcount, &i); | |
5856 | if (error) | |
4db431f5 | 5857 | return error; |
5fb5aeee | 5858 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
ddb19e31 BF |
5859 | |
5860 | left.br_blockcount = blockcount; | |
5861 | ||
4db431f5 DC |
5862 | return xfs_bmbt_update(cur, left.br_startoff, left.br_startblock, |
5863 | left.br_blockcount, left.br_state); | |
ddb19e31 BF |
5864 | } |
5865 | ||
a979bdfe BF |
5866 | /* |
5867 | * Shift a single extent. | |
5868 | */ | |
5869 | STATIC int | |
5870 | xfs_bmse_shift_one( | |
5871 | struct xfs_inode *ip, | |
5872 | int whichfork, | |
5873 | xfs_fileoff_t offset_shift_fsb, | |
5874 | int *current_ext, | |
5875 | struct xfs_bmbt_rec_host *gotp, | |
5876 | struct xfs_btree_cur *cur, | |
a904b1ca | 5877 | int *logflags, |
9c194644 DW |
5878 | enum shift_direction direction, |
5879 | struct xfs_defer_ops *dfops) | |
a979bdfe BF |
5880 | { |
5881 | struct xfs_ifork *ifp; | |
5fb5aeee | 5882 | struct xfs_mount *mp; |
a979bdfe | 5883 | xfs_fileoff_t startoff; |
a904b1ca | 5884 | struct xfs_bmbt_rec_host *adj_irecp; |
a979bdfe | 5885 | struct xfs_bmbt_irec got; |
a904b1ca | 5886 | struct xfs_bmbt_irec adj_irec; |
a979bdfe BF |
5887 | int error; |
5888 | int i; | |
a904b1ca | 5889 | int total_extents; |
a979bdfe | 5890 | |
5fb5aeee | 5891 | mp = ip->i_mount; |
a979bdfe | 5892 | ifp = XFS_IFORK_PTR(ip, whichfork); |
5d829300 | 5893 | total_extents = xfs_iext_count(ifp); |
a979bdfe BF |
5894 | |
5895 | xfs_bmbt_get_all(gotp, &got); | |
a979bdfe | 5896 | |
f71721d0 | 5897 | /* delalloc extents should be prevented by caller */ |
5fb5aeee | 5898 | XFS_WANT_CORRUPTED_RETURN(mp, !isnullstartblock(got.br_startblock)); |
f71721d0 | 5899 | |
a904b1ca NJ |
5900 | if (direction == SHIFT_LEFT) { |
5901 | startoff = got.br_startoff - offset_shift_fsb; | |
5902 | ||
5903 | /* | |
5904 | * Check for merge if we've got an extent to the left, | |
5905 | * otherwise make sure there's enough room at the start | |
5906 | * of the file for the shift. | |
5907 | */ | |
5908 | if (!*current_ext) { | |
5909 | if (got.br_startoff < offset_shift_fsb) | |
5910 | return -EINVAL; | |
5911 | goto update_current_ext; | |
5912 | } | |
5913 | /* | |
5914 | * grab the left extent and check for a large | |
5915 | * enough hole. | |
5916 | */ | |
5917 | adj_irecp = xfs_iext_get_ext(ifp, *current_ext - 1); | |
5918 | xfs_bmbt_get_all(adj_irecp, &adj_irec); | |
a979bdfe | 5919 | |
a904b1ca NJ |
5920 | if (startoff < |
5921 | adj_irec.br_startoff + adj_irec.br_blockcount) | |
b11bd671 | 5922 | return -EINVAL; |
a979bdfe | 5923 | |
b11bd671 | 5924 | /* check whether to merge the extent or shift it down */ |
a904b1ca NJ |
5925 | if (xfs_bmse_can_merge(&adj_irec, &got, |
5926 | offset_shift_fsb)) { | |
9c194644 DW |
5927 | error = xfs_bmse_merge(ip, whichfork, offset_shift_fsb, |
5928 | *current_ext, gotp, adj_irecp, | |
5929 | cur, logflags); | |
5930 | if (error) | |
5931 | return error; | |
5932 | adj_irec = got; | |
5933 | goto update_rmap; | |
b11bd671 | 5934 | } |
a904b1ca NJ |
5935 | } else { |
5936 | startoff = got.br_startoff + offset_shift_fsb; | |
5937 | /* nothing to move if this is the last extent */ | |
5938 | if (*current_ext >= (total_extents - 1)) | |
5939 | goto update_current_ext; | |
5940 | /* | |
5941 | * If this is not the last extent in the file, make sure there | |
5942 | * is enough room between current extent and next extent for | |
5943 | * accommodating the shift. | |
5944 | */ | |
5945 | adj_irecp = xfs_iext_get_ext(ifp, *current_ext + 1); | |
5946 | xfs_bmbt_get_all(adj_irecp, &adj_irec); | |
5947 | if (startoff + got.br_blockcount > adj_irec.br_startoff) | |
5948 | return -EINVAL; | |
5949 | /* | |
5950 | * Unlike a left shift (which involves a hole punch), | |
5951 | * a right shift does not modify extent neighbors | |
5952 | * in any way. We should never find mergeable extents | |
5953 | * in this scenario. Check anyways and warn if we | |
5954 | * encounter two extents that could be one. | |
5955 | */ | |
5956 | if (xfs_bmse_can_merge(&got, &adj_irec, offset_shift_fsb)) | |
5957 | WARN_ON_ONCE(1); | |
5958 | } | |
a979bdfe BF |
5959 | /* |
5960 | * Increment the extent index for the next iteration, update the start | |
5961 | * offset of the in-core extent and update the btree if applicable. | |
5962 | */ | |
a904b1ca NJ |
5963 | update_current_ext: |
5964 | if (direction == SHIFT_LEFT) | |
5965 | (*current_ext)++; | |
5966 | else | |
5967 | (*current_ext)--; | |
a979bdfe BF |
5968 | xfs_bmbt_set_startoff(gotp, startoff); |
5969 | *logflags |= XFS_ILOG_CORE; | |
9c194644 | 5970 | adj_irec = got; |
a979bdfe BF |
5971 | if (!cur) { |
5972 | *logflags |= XFS_ILOG_DEXT; | |
9c194644 | 5973 | goto update_rmap; |
a979bdfe BF |
5974 | } |
5975 | ||
5976 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock, | |
5977 | got.br_blockcount, &i); | |
5978 | if (error) | |
5979 | return error; | |
5fb5aeee | 5980 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
a979bdfe BF |
5981 | |
5982 | got.br_startoff = startoff; | |
9c194644 DW |
5983 | error = xfs_bmbt_update(cur, got.br_startoff, got.br_startblock, |
5984 | got.br_blockcount, got.br_state); | |
5985 | if (error) | |
5986 | return error; | |
5987 | ||
5988 | update_rmap: | |
5989 | /* update reverse mapping */ | |
5990 | error = xfs_rmap_unmap_extent(mp, dfops, ip, whichfork, &adj_irec); | |
5991 | if (error) | |
5992 | return error; | |
5993 | adj_irec.br_startoff = startoff; | |
5994 | return xfs_rmap_map_extent(mp, dfops, ip, whichfork, &adj_irec); | |
a979bdfe BF |
5995 | } |
5996 | ||
e1d8fb88 | 5997 | /* |
a904b1ca | 5998 | * Shift extent records to the left/right to cover/create a hole. |
e1d8fb88 | 5999 | * |
2c845f5a | 6000 | * The maximum number of extents to be shifted in a single operation is |
a904b1ca | 6001 | * @num_exts. @stop_fsb specifies the file offset at which to stop shift and the |
2c845f5a BF |
6002 | * file offset where we've left off is returned in @next_fsb. @offset_shift_fsb |
6003 | * is the length by which each extent is shifted. If there is no hole to shift | |
6004 | * the extents into, this will be considered invalid operation and we abort | |
6005 | * immediately. | |
e1d8fb88 NJ |
6006 | */ |
6007 | int | |
6008 | xfs_bmap_shift_extents( | |
6009 | struct xfs_trans *tp, | |
6010 | struct xfs_inode *ip, | |
a904b1ca | 6011 | xfs_fileoff_t *next_fsb, |
e1d8fb88 | 6012 | xfs_fileoff_t offset_shift_fsb, |
2c845f5a | 6013 | int *done, |
a904b1ca | 6014 | xfs_fileoff_t stop_fsb, |
e1d8fb88 | 6015 | xfs_fsblock_t *firstblock, |
2c3234d1 | 6016 | struct xfs_defer_ops *dfops, |
a904b1ca | 6017 | enum shift_direction direction, |
e1d8fb88 NJ |
6018 | int num_exts) |
6019 | { | |
ca446d88 | 6020 | struct xfs_btree_cur *cur = NULL; |
e1d8fb88 NJ |
6021 | struct xfs_bmbt_rec_host *gotp; |
6022 | struct xfs_bmbt_irec got; | |
e1d8fb88 NJ |
6023 | struct xfs_mount *mp = ip->i_mount; |
6024 | struct xfs_ifork *ifp; | |
6025 | xfs_extnum_t nexts = 0; | |
2c845f5a | 6026 | xfs_extnum_t current_ext; |
a904b1ca NJ |
6027 | xfs_extnum_t total_extents; |
6028 | xfs_extnum_t stop_extent; | |
e1d8fb88 | 6029 | int error = 0; |
e1d8fb88 | 6030 | int whichfork = XFS_DATA_FORK; |
ca446d88 | 6031 | int logflags = 0; |
e1d8fb88 NJ |
6032 | |
6033 | if (unlikely(XFS_TEST_ERROR( | |
6034 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
6035 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
6036 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
6037 | XFS_ERROR_REPORT("xfs_bmap_shift_extents", | |
6038 | XFS_ERRLEVEL_LOW, mp); | |
2451337d | 6039 | return -EFSCORRUPTED; |
e1d8fb88 NJ |
6040 | } |
6041 | ||
6042 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 6043 | return -EIO; |
e1d8fb88 | 6044 | |
2c845f5a BF |
6045 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
6046 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
a904b1ca NJ |
6047 | ASSERT(direction == SHIFT_LEFT || direction == SHIFT_RIGHT); |
6048 | ASSERT(*next_fsb != NULLFSBLOCK || direction == SHIFT_RIGHT); | |
e1d8fb88 NJ |
6049 | |
6050 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
e1d8fb88 NJ |
6051 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { |
6052 | /* Read in all the extents */ | |
6053 | error = xfs_iread_extents(tp, ip, whichfork); | |
6054 | if (error) | |
6055 | return error; | |
6056 | } | |
6057 | ||
ddb19e31 BF |
6058 | if (ifp->if_flags & XFS_IFBROOT) { |
6059 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
6060 | cur->bc_private.b.firstblock = *firstblock; | |
2c3234d1 | 6061 | cur->bc_private.b.dfops = dfops; |
ddb19e31 BF |
6062 | cur->bc_private.b.flags = 0; |
6063 | } | |
6064 | ||
a904b1ca NJ |
6065 | /* |
6066 | * There may be delalloc extents in the data fork before the range we | |
6067 | * are collapsing out, so we cannot use the count of real extents here. | |
6068 | * Instead we have to calculate it from the incore fork. | |
6069 | */ | |
5d829300 | 6070 | total_extents = xfs_iext_count(ifp); |
a904b1ca NJ |
6071 | if (total_extents == 0) { |
6072 | *done = 1; | |
6073 | goto del_cursor; | |
6074 | } | |
6075 | ||
6076 | /* | |
6077 | * In case of first right shift, we need to initialize next_fsb | |
6078 | */ | |
6079 | if (*next_fsb == NULLFSBLOCK) { | |
6080 | gotp = xfs_iext_get_ext(ifp, total_extents - 1); | |
6081 | xfs_bmbt_get_all(gotp, &got); | |
6082 | *next_fsb = got.br_startoff; | |
6083 | if (stop_fsb > *next_fsb) { | |
6084 | *done = 1; | |
6085 | goto del_cursor; | |
6086 | } | |
6087 | } | |
6088 | ||
6089 | /* Lookup the extent index at which we have to stop */ | |
6090 | if (direction == SHIFT_RIGHT) { | |
6091 | gotp = xfs_iext_bno_to_ext(ifp, stop_fsb, &stop_extent); | |
6092 | /* Make stop_extent exclusive of shift range */ | |
6093 | stop_extent--; | |
6094 | } else | |
6095 | stop_extent = total_extents; | |
6096 | ||
e1d8fb88 | 6097 | /* |
2c845f5a BF |
6098 | * Look up the extent index for the fsb where we start shifting. We can |
6099 | * henceforth iterate with current_ext as extent list changes are locked | |
6100 | * out via ilock. | |
6101 | * | |
6102 | * gotp can be null in 2 cases: 1) if there are no extents or 2) | |
a904b1ca | 6103 | * *next_fsb lies in a hole beyond which there are no extents. Either |
2c845f5a | 6104 | * way, we are done. |
e1d8fb88 | 6105 | */ |
a904b1ca | 6106 | gotp = xfs_iext_bno_to_ext(ifp, *next_fsb, ¤t_ext); |
2c845f5a BF |
6107 | if (!gotp) { |
6108 | *done = 1; | |
ddb19e31 | 6109 | goto del_cursor; |
e1d8fb88 | 6110 | } |
e1d8fb88 | 6111 | |
a904b1ca NJ |
6112 | /* some sanity checking before we finally start shifting extents */ |
6113 | if ((direction == SHIFT_LEFT && current_ext >= stop_extent) || | |
6114 | (direction == SHIFT_RIGHT && current_ext <= stop_extent)) { | |
6115 | error = -EIO; | |
6116 | goto del_cursor; | |
6117 | } | |
6118 | ||
6119 | while (nexts++ < num_exts) { | |
a979bdfe | 6120 | error = xfs_bmse_shift_one(ip, whichfork, offset_shift_fsb, |
a904b1ca | 6121 | ¤t_ext, gotp, cur, &logflags, |
9c194644 | 6122 | direction, dfops); |
a979bdfe BF |
6123 | if (error) |
6124 | goto del_cursor; | |
a904b1ca NJ |
6125 | /* |
6126 | * If there was an extent merge during the shift, the extent | |
6127 | * count can change. Update the total and grade the next record. | |
6128 | */ | |
6129 | if (direction == SHIFT_LEFT) { | |
5d829300 | 6130 | total_extents = xfs_iext_count(ifp); |
a904b1ca NJ |
6131 | stop_extent = total_extents; |
6132 | } | |
e1d8fb88 | 6133 | |
a904b1ca NJ |
6134 | if (current_ext == stop_extent) { |
6135 | *done = 1; | |
6136 | *next_fsb = NULLFSBLOCK; | |
ddb19e31 | 6137 | break; |
a904b1ca | 6138 | } |
ddb19e31 | 6139 | gotp = xfs_iext_get_ext(ifp, current_ext); |
e1d8fb88 NJ |
6140 | } |
6141 | ||
a904b1ca | 6142 | if (!*done) { |
a979bdfe | 6143 | xfs_bmbt_get_all(gotp, &got); |
2c845f5a | 6144 | *next_fsb = got.br_startoff; |
a979bdfe | 6145 | } |
e1d8fb88 NJ |
6146 | |
6147 | del_cursor: | |
6148 | if (cur) | |
6149 | xfs_btree_del_cursor(cur, | |
6150 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
6151 | ||
ca446d88 BF |
6152 | if (logflags) |
6153 | xfs_trans_log_inode(tp, ip, logflags); | |
2c845f5a | 6154 | |
e1d8fb88 NJ |
6155 | return error; |
6156 | } | |
a904b1ca NJ |
6157 | |
6158 | /* | |
6159 | * Splits an extent into two extents at split_fsb block such that it is | |
6160 | * the first block of the current_ext. @current_ext is a target extent | |
6161 | * to be split. @split_fsb is a block where the extents is split. | |
6162 | * If split_fsb lies in a hole or the first block of extents, just return 0. | |
6163 | */ | |
6164 | STATIC int | |
6165 | xfs_bmap_split_extent_at( | |
6166 | struct xfs_trans *tp, | |
6167 | struct xfs_inode *ip, | |
6168 | xfs_fileoff_t split_fsb, | |
6169 | xfs_fsblock_t *firstfsb, | |
2c3234d1 | 6170 | struct xfs_defer_ops *dfops) |
a904b1ca NJ |
6171 | { |
6172 | int whichfork = XFS_DATA_FORK; | |
6173 | struct xfs_btree_cur *cur = NULL; | |
6174 | struct xfs_bmbt_rec_host *gotp; | |
6175 | struct xfs_bmbt_irec got; | |
6176 | struct xfs_bmbt_irec new; /* split extent */ | |
6177 | struct xfs_mount *mp = ip->i_mount; | |
6178 | struct xfs_ifork *ifp; | |
6179 | xfs_fsblock_t gotblkcnt; /* new block count for got */ | |
6180 | xfs_extnum_t current_ext; | |
6181 | int error = 0; | |
6182 | int logflags = 0; | |
6183 | int i = 0; | |
6184 | ||
6185 | if (unlikely(XFS_TEST_ERROR( | |
6186 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
6187 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
6188 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
6189 | XFS_ERROR_REPORT("xfs_bmap_split_extent_at", | |
6190 | XFS_ERRLEVEL_LOW, mp); | |
6191 | return -EFSCORRUPTED; | |
6192 | } | |
6193 | ||
6194 | if (XFS_FORCED_SHUTDOWN(mp)) | |
6195 | return -EIO; | |
6196 | ||
6197 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
6198 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
6199 | /* Read in all the extents */ | |
6200 | error = xfs_iread_extents(tp, ip, whichfork); | |
6201 | if (error) | |
6202 | return error; | |
6203 | } | |
6204 | ||
6205 | /* | |
6206 | * gotp can be null in 2 cases: 1) if there are no extents | |
6207 | * or 2) split_fsb lies in a hole beyond which there are | |
6208 | * no extents. Either way, we are done. | |
6209 | */ | |
6210 | gotp = xfs_iext_bno_to_ext(ifp, split_fsb, ¤t_ext); | |
6211 | if (!gotp) | |
6212 | return 0; | |
6213 | ||
6214 | xfs_bmbt_get_all(gotp, &got); | |
6215 | ||
6216 | /* | |
6217 | * Check split_fsb lies in a hole or the start boundary offset | |
6218 | * of the extent. | |
6219 | */ | |
6220 | if (got.br_startoff >= split_fsb) | |
6221 | return 0; | |
6222 | ||
6223 | gotblkcnt = split_fsb - got.br_startoff; | |
6224 | new.br_startoff = split_fsb; | |
6225 | new.br_startblock = got.br_startblock + gotblkcnt; | |
6226 | new.br_blockcount = got.br_blockcount - gotblkcnt; | |
6227 | new.br_state = got.br_state; | |
6228 | ||
6229 | if (ifp->if_flags & XFS_IFBROOT) { | |
6230 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
6231 | cur->bc_private.b.firstblock = *firstfsb; | |
2c3234d1 | 6232 | cur->bc_private.b.dfops = dfops; |
a904b1ca NJ |
6233 | cur->bc_private.b.flags = 0; |
6234 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
6235 | got.br_startblock, | |
6236 | got.br_blockcount, | |
6237 | &i); | |
6238 | if (error) | |
6239 | goto del_cursor; | |
6240 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); | |
6241 | } | |
6242 | ||
6243 | xfs_bmbt_set_blockcount(gotp, gotblkcnt); | |
6244 | got.br_blockcount = gotblkcnt; | |
6245 | ||
6246 | logflags = XFS_ILOG_CORE; | |
6247 | if (cur) { | |
6248 | error = xfs_bmbt_update(cur, got.br_startoff, | |
6249 | got.br_startblock, | |
6250 | got.br_blockcount, | |
6251 | got.br_state); | |
6252 | if (error) | |
6253 | goto del_cursor; | |
6254 | } else | |
6255 | logflags |= XFS_ILOG_DEXT; | |
6256 | ||
6257 | /* Add new extent */ | |
6258 | current_ext++; | |
6259 | xfs_iext_insert(ip, current_ext, 1, &new, 0); | |
6260 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
6261 | XFS_IFORK_NEXTENTS(ip, whichfork) + 1); | |
6262 | ||
6263 | if (cur) { | |
6264 | error = xfs_bmbt_lookup_eq(cur, new.br_startoff, | |
6265 | new.br_startblock, new.br_blockcount, | |
6266 | &i); | |
6267 | if (error) | |
6268 | goto del_cursor; | |
6269 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, del_cursor); | |
6270 | cur->bc_rec.b.br_state = new.br_state; | |
6271 | ||
6272 | error = xfs_btree_insert(cur, &i); | |
6273 | if (error) | |
6274 | goto del_cursor; | |
6275 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); | |
6276 | } | |
6277 | ||
6278 | /* | |
6279 | * Convert to a btree if necessary. | |
6280 | */ | |
6281 | if (xfs_bmap_needs_btree(ip, whichfork)) { | |
6282 | int tmp_logflags; /* partial log flag return val */ | |
6283 | ||
6284 | ASSERT(cur == NULL); | |
2c3234d1 | 6285 | error = xfs_bmap_extents_to_btree(tp, ip, firstfsb, dfops, |
a904b1ca NJ |
6286 | &cur, 0, &tmp_logflags, whichfork); |
6287 | logflags |= tmp_logflags; | |
6288 | } | |
6289 | ||
6290 | del_cursor: | |
6291 | if (cur) { | |
6292 | cur->bc_private.b.allocated = 0; | |
6293 | xfs_btree_del_cursor(cur, | |
6294 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
6295 | } | |
6296 | ||
6297 | if (logflags) | |
6298 | xfs_trans_log_inode(tp, ip, logflags); | |
6299 | return error; | |
6300 | } | |
6301 | ||
6302 | int | |
6303 | xfs_bmap_split_extent( | |
6304 | struct xfs_inode *ip, | |
6305 | xfs_fileoff_t split_fsb) | |
6306 | { | |
6307 | struct xfs_mount *mp = ip->i_mount; | |
6308 | struct xfs_trans *tp; | |
2c3234d1 | 6309 | struct xfs_defer_ops dfops; |
a904b1ca | 6310 | xfs_fsblock_t firstfsb; |
a904b1ca NJ |
6311 | int error; |
6312 | ||
253f4911 CH |
6313 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, |
6314 | XFS_DIOSTRAT_SPACE_RES(mp, 0), 0, 0, &tp); | |
6315 | if (error) | |
a904b1ca | 6316 | return error; |
a904b1ca NJ |
6317 | |
6318 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
6319 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
6320 | ||
2c3234d1 | 6321 | xfs_defer_init(&dfops, &firstfsb); |
a904b1ca NJ |
6322 | |
6323 | error = xfs_bmap_split_extent_at(tp, ip, split_fsb, | |
2c3234d1 | 6324 | &firstfsb, &dfops); |
a904b1ca NJ |
6325 | if (error) |
6326 | goto out; | |
6327 | ||
2c3234d1 | 6328 | error = xfs_defer_finish(&tp, &dfops, NULL); |
a904b1ca NJ |
6329 | if (error) |
6330 | goto out; | |
6331 | ||
70393313 | 6332 | return xfs_trans_commit(tp); |
a904b1ca NJ |
6333 | |
6334 | out: | |
2c3234d1 | 6335 | xfs_defer_cancel(&dfops); |
4906e215 | 6336 | xfs_trans_cancel(tp); |
a904b1ca NJ |
6337 | return error; |
6338 | } | |
9f3afb57 DW |
6339 | |
6340 | /* Deferred mapping is only for real extents in the data fork. */ | |
6341 | static bool | |
6342 | xfs_bmap_is_update_needed( | |
6343 | struct xfs_bmbt_irec *bmap) | |
6344 | { | |
6345 | return bmap->br_startblock != HOLESTARTBLOCK && | |
6346 | bmap->br_startblock != DELAYSTARTBLOCK; | |
6347 | } | |
6348 | ||
6349 | /* Record a bmap intent. */ | |
6350 | static int | |
6351 | __xfs_bmap_add( | |
6352 | struct xfs_mount *mp, | |
6353 | struct xfs_defer_ops *dfops, | |
6354 | enum xfs_bmap_intent_type type, | |
6355 | struct xfs_inode *ip, | |
6356 | int whichfork, | |
6357 | struct xfs_bmbt_irec *bmap) | |
6358 | { | |
6359 | int error; | |
6360 | struct xfs_bmap_intent *bi; | |
6361 | ||
6362 | trace_xfs_bmap_defer(mp, | |
6363 | XFS_FSB_TO_AGNO(mp, bmap->br_startblock), | |
6364 | type, | |
6365 | XFS_FSB_TO_AGBNO(mp, bmap->br_startblock), | |
6366 | ip->i_ino, whichfork, | |
6367 | bmap->br_startoff, | |
6368 | bmap->br_blockcount, | |
6369 | bmap->br_state); | |
6370 | ||
6371 | bi = kmem_alloc(sizeof(struct xfs_bmap_intent), KM_SLEEP | KM_NOFS); | |
6372 | INIT_LIST_HEAD(&bi->bi_list); | |
6373 | bi->bi_type = type; | |
6374 | bi->bi_owner = ip; | |
6375 | bi->bi_whichfork = whichfork; | |
6376 | bi->bi_bmap = *bmap; | |
6377 | ||
6378 | error = xfs_defer_join(dfops, bi->bi_owner); | |
6379 | if (error) { | |
6380 | kmem_free(bi); | |
6381 | return error; | |
6382 | } | |
6383 | ||
6384 | xfs_defer_add(dfops, XFS_DEFER_OPS_TYPE_BMAP, &bi->bi_list); | |
6385 | return 0; | |
6386 | } | |
6387 | ||
6388 | /* Map an extent into a file. */ | |
6389 | int | |
6390 | xfs_bmap_map_extent( | |
6391 | struct xfs_mount *mp, | |
6392 | struct xfs_defer_ops *dfops, | |
6393 | struct xfs_inode *ip, | |
6394 | struct xfs_bmbt_irec *PREV) | |
6395 | { | |
6396 | if (!xfs_bmap_is_update_needed(PREV)) | |
6397 | return 0; | |
6398 | ||
6399 | return __xfs_bmap_add(mp, dfops, XFS_BMAP_MAP, ip, | |
6400 | XFS_DATA_FORK, PREV); | |
6401 | } | |
6402 | ||
6403 | /* Unmap an extent out of a file. */ | |
6404 | int | |
6405 | xfs_bmap_unmap_extent( | |
6406 | struct xfs_mount *mp, | |
6407 | struct xfs_defer_ops *dfops, | |
6408 | struct xfs_inode *ip, | |
6409 | struct xfs_bmbt_irec *PREV) | |
6410 | { | |
6411 | if (!xfs_bmap_is_update_needed(PREV)) | |
6412 | return 0; | |
6413 | ||
6414 | return __xfs_bmap_add(mp, dfops, XFS_BMAP_UNMAP, ip, | |
6415 | XFS_DATA_FORK, PREV); | |
6416 | } | |
6417 | ||
6418 | /* | |
6419 | * Process one of the deferred bmap operations. We pass back the | |
6420 | * btree cursor to maintain our lock on the bmapbt between calls. | |
6421 | */ | |
6422 | int | |
6423 | xfs_bmap_finish_one( | |
6424 | struct xfs_trans *tp, | |
6425 | struct xfs_defer_ops *dfops, | |
6426 | struct xfs_inode *ip, | |
6427 | enum xfs_bmap_intent_type type, | |
6428 | int whichfork, | |
6429 | xfs_fileoff_t startoff, | |
6430 | xfs_fsblock_t startblock, | |
6431 | xfs_filblks_t blockcount, | |
6432 | xfs_exntst_t state) | |
6433 | { | |
6434 | struct xfs_bmbt_irec bmap; | |
6435 | int nimaps = 1; | |
6436 | xfs_fsblock_t firstfsb; | |
6437 | int flags = XFS_BMAPI_REMAP; | |
6438 | int done; | |
6439 | int error = 0; | |
6440 | ||
6441 | bmap.br_startblock = startblock; | |
6442 | bmap.br_startoff = startoff; | |
6443 | bmap.br_blockcount = blockcount; | |
6444 | bmap.br_state = state; | |
6445 | ||
6446 | trace_xfs_bmap_deferred(tp->t_mountp, | |
6447 | XFS_FSB_TO_AGNO(tp->t_mountp, startblock), type, | |
6448 | XFS_FSB_TO_AGBNO(tp->t_mountp, startblock), | |
6449 | ip->i_ino, whichfork, startoff, blockcount, state); | |
6450 | ||
6451 | if (whichfork != XFS_DATA_FORK && whichfork != XFS_ATTR_FORK) | |
6452 | return -EFSCORRUPTED; | |
6453 | if (whichfork == XFS_ATTR_FORK) | |
6454 | flags |= XFS_BMAPI_ATTRFORK; | |
6455 | ||
6456 | if (XFS_TEST_ERROR(false, tp->t_mountp, | |
6457 | XFS_ERRTAG_BMAP_FINISH_ONE, | |
6458 | XFS_RANDOM_BMAP_FINISH_ONE)) | |
6459 | return -EIO; | |
6460 | ||
6461 | switch (type) { | |
6462 | case XFS_BMAP_MAP: | |
6463 | firstfsb = bmap.br_startblock; | |
6464 | error = xfs_bmapi_write(tp, ip, bmap.br_startoff, | |
6465 | bmap.br_blockcount, flags, &firstfsb, | |
6466 | bmap.br_blockcount, &bmap, &nimaps, | |
6467 | dfops); | |
6468 | break; | |
6469 | case XFS_BMAP_UNMAP: | |
6470 | error = xfs_bunmapi(tp, ip, bmap.br_startoff, | |
6471 | bmap.br_blockcount, flags, 1, &firstfsb, | |
6472 | dfops, &done); | |
6473 | ASSERT(done); | |
6474 | break; | |
6475 | default: | |
6476 | ASSERT(0); | |
6477 | error = -EFSCORRUPTED; | |
6478 | } | |
6479 | ||
6480 | return error; | |
6481 | } |