Commit | Line | Data |
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1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_fs.h" |
70a9883c | 20 | #include "xfs_shared.h" |
239880ef DC |
21 | #include "xfs_format.h" |
22 | #include "xfs_log_format.h" | |
23 | #include "xfs_trans_resv.h" | |
a844f451 | 24 | #include "xfs_bit.h" |
1da177e4 | 25 | #include "xfs_sb.h" |
f5ea1100 | 26 | #include "xfs_mount.h" |
57062787 | 27 | #include "xfs_da_format.h" |
a844f451 | 28 | #include "xfs_da_btree.h" |
2b9ab5ab | 29 | #include "xfs_dir2.h" |
1da177e4 | 30 | #include "xfs_inode.h" |
a844f451 | 31 | #include "xfs_btree.h" |
239880ef | 32 | #include "xfs_trans.h" |
a844f451 | 33 | #include "xfs_inode_item.h" |
1da177e4 LT |
34 | #include "xfs_extfree_item.h" |
35 | #include "xfs_alloc.h" | |
36 | #include "xfs_bmap.h" | |
68988114 | 37 | #include "xfs_bmap_util.h" |
a4fbe6ab | 38 | #include "xfs_bmap_btree.h" |
1da177e4 LT |
39 | #include "xfs_rtalloc.h" |
40 | #include "xfs_error.h" | |
1da177e4 LT |
41 | #include "xfs_quota.h" |
42 | #include "xfs_trans_space.h" | |
43 | #include "xfs_buf_item.h" | |
0b1b213f | 44 | #include "xfs_trace.h" |
19de7351 | 45 | #include "xfs_symlink.h" |
a4fbe6ab | 46 | #include "xfs_attr_leaf.h" |
a4fbe6ab | 47 | #include "xfs_filestream.h" |
1da177e4 LT |
48 | |
49 | ||
1da177e4 LT |
50 | kmem_zone_t *xfs_bmap_free_item_zone; |
51 | ||
52 | /* | |
9e5987a7 | 53 | * Miscellaneous helper functions |
1da177e4 LT |
54 | */ |
55 | ||
1da177e4 | 56 | /* |
9e5987a7 DC |
57 | * Compute and fill in the value of the maximum depth of a bmap btree |
58 | * in this filesystem. Done once, during mount. | |
1da177e4 | 59 | */ |
9e5987a7 DC |
60 | void |
61 | xfs_bmap_compute_maxlevels( | |
62 | xfs_mount_t *mp, /* file system mount structure */ | |
63 | int whichfork) /* data or attr fork */ | |
64 | { | |
65 | int level; /* btree level */ | |
66 | uint maxblocks; /* max blocks at this level */ | |
67 | uint maxleafents; /* max leaf entries possible */ | |
68 | int maxrootrecs; /* max records in root block */ | |
69 | int minleafrecs; /* min records in leaf block */ | |
70 | int minnoderecs; /* min records in node block */ | |
71 | int sz; /* root block size */ | |
1da177e4 | 72 | |
9e5987a7 DC |
73 | /* |
74 | * The maximum number of extents in a file, hence the maximum | |
75 | * number of leaf entries, is controlled by the type of di_nextents | |
76 | * (a signed 32-bit number, xfs_extnum_t), or by di_anextents | |
77 | * (a signed 16-bit number, xfs_aextnum_t). | |
78 | * | |
79 | * Note that we can no longer assume that if we are in ATTR1 that | |
80 | * the fork offset of all the inodes will be | |
81 | * (xfs_default_attroffset(ip) >> 3) because we could have mounted | |
82 | * with ATTR2 and then mounted back with ATTR1, keeping the | |
83 | * di_forkoff's fixed but probably at various positions. Therefore, | |
84 | * for both ATTR1 and ATTR2 we have to assume the worst case scenario | |
85 | * of a minimum size available. | |
86 | */ | |
87 | if (whichfork == XFS_DATA_FORK) { | |
88 | maxleafents = MAXEXTNUM; | |
89 | sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS); | |
90 | } else { | |
91 | maxleafents = MAXAEXTNUM; | |
92 | sz = XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
93 | } | |
152d93b7 | 94 | maxrootrecs = xfs_bmdr_maxrecs(sz, 0); |
9e5987a7 DC |
95 | minleafrecs = mp->m_bmap_dmnr[0]; |
96 | minnoderecs = mp->m_bmap_dmnr[1]; | |
97 | maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; | |
98 | for (level = 1; maxblocks > 1; level++) { | |
99 | if (maxblocks <= maxrootrecs) | |
100 | maxblocks = 1; | |
101 | else | |
102 | maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; | |
103 | } | |
104 | mp->m_bm_maxlevels[whichfork] = level; | |
105 | } | |
91e11088 | 106 | |
fe033cc8 CH |
107 | STATIC int /* error */ |
108 | xfs_bmbt_lookup_eq( | |
109 | struct xfs_btree_cur *cur, | |
110 | xfs_fileoff_t off, | |
111 | xfs_fsblock_t bno, | |
112 | xfs_filblks_t len, | |
113 | int *stat) /* success/failure */ | |
114 | { | |
115 | cur->bc_rec.b.br_startoff = off; | |
116 | cur->bc_rec.b.br_startblock = bno; | |
117 | cur->bc_rec.b.br_blockcount = len; | |
118 | return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); | |
119 | } | |
120 | ||
121 | STATIC int /* error */ | |
122 | xfs_bmbt_lookup_ge( | |
123 | struct xfs_btree_cur *cur, | |
124 | xfs_fileoff_t off, | |
125 | xfs_fsblock_t bno, | |
126 | xfs_filblks_t len, | |
127 | int *stat) /* success/failure */ | |
128 | { | |
129 | cur->bc_rec.b.br_startoff = off; | |
130 | cur->bc_rec.b.br_startblock = bno; | |
131 | cur->bc_rec.b.br_blockcount = len; | |
132 | return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); | |
133 | } | |
134 | ||
278d0ca1 | 135 | /* |
8096b1eb CH |
136 | * Check if the inode needs to be converted to btree format. |
137 | */ | |
138 | static inline bool xfs_bmap_needs_btree(struct xfs_inode *ip, int whichfork) | |
139 | { | |
140 | return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && | |
141 | XFS_IFORK_NEXTENTS(ip, whichfork) > | |
142 | XFS_IFORK_MAXEXT(ip, whichfork); | |
143 | } | |
144 | ||
145 | /* | |
146 | * Check if the inode should be converted to extent format. | |
147 | */ | |
148 | static inline bool xfs_bmap_wants_extents(struct xfs_inode *ip, int whichfork) | |
149 | { | |
150 | return XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && | |
151 | XFS_IFORK_NEXTENTS(ip, whichfork) <= | |
152 | XFS_IFORK_MAXEXT(ip, whichfork); | |
153 | } | |
154 | ||
155 | /* | |
156 | * Update the record referred to by cur to the value given | |
278d0ca1 CH |
157 | * by [off, bno, len, state]. |
158 | * This either works (return 0) or gets an EFSCORRUPTED error. | |
159 | */ | |
160 | STATIC int | |
161 | xfs_bmbt_update( | |
162 | struct xfs_btree_cur *cur, | |
163 | xfs_fileoff_t off, | |
164 | xfs_fsblock_t bno, | |
165 | xfs_filblks_t len, | |
166 | xfs_exntst_t state) | |
167 | { | |
168 | union xfs_btree_rec rec; | |
169 | ||
170 | xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state); | |
171 | return xfs_btree_update(cur, &rec); | |
172 | } | |
fe033cc8 | 173 | |
1da177e4 | 174 | /* |
9e5987a7 DC |
175 | * Compute the worst-case number of indirect blocks that will be used |
176 | * for ip's delayed extent of length "len". | |
1da177e4 | 177 | */ |
9e5987a7 DC |
178 | STATIC xfs_filblks_t |
179 | xfs_bmap_worst_indlen( | |
180 | xfs_inode_t *ip, /* incore inode pointer */ | |
181 | xfs_filblks_t len) /* delayed extent length */ | |
1da177e4 | 182 | { |
9e5987a7 DC |
183 | int level; /* btree level number */ |
184 | int maxrecs; /* maximum record count at this level */ | |
185 | xfs_mount_t *mp; /* mount structure */ | |
186 | xfs_filblks_t rval; /* return value */ | |
1da177e4 LT |
187 | |
188 | mp = ip->i_mount; | |
9e5987a7 DC |
189 | maxrecs = mp->m_bmap_dmxr[0]; |
190 | for (level = 0, rval = 0; | |
191 | level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); | |
192 | level++) { | |
193 | len += maxrecs - 1; | |
194 | do_div(len, maxrecs); | |
195 | rval += len; | |
196 | if (len == 1) | |
197 | return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - | |
198 | level - 1; | |
199 | if (level == 0) | |
200 | maxrecs = mp->m_bmap_dmxr[1]; | |
1da177e4 | 201 | } |
9e5987a7 | 202 | return rval; |
1da177e4 LT |
203 | } |
204 | ||
205 | /* | |
9e5987a7 | 206 | * Calculate the default attribute fork offset for newly created inodes. |
1da177e4 | 207 | */ |
9e5987a7 DC |
208 | uint |
209 | xfs_default_attroffset( | |
210 | struct xfs_inode *ip) | |
1da177e4 | 211 | { |
9e5987a7 DC |
212 | struct xfs_mount *mp = ip->i_mount; |
213 | uint offset; | |
1da177e4 | 214 | |
9e5987a7 | 215 | if (mp->m_sb.sb_inodesize == 256) { |
56cea2d0 | 216 | offset = XFS_LITINO(mp, ip->i_d.di_version) - |
9e5987a7 DC |
217 | XFS_BMDR_SPACE_CALC(MINABTPTRS); |
218 | } else { | |
219 | offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); | |
1da177e4 | 220 | } |
9e5987a7 | 221 | |
56cea2d0 | 222 | ASSERT(offset < XFS_LITINO(mp, ip->i_d.di_version)); |
9e5987a7 | 223 | return offset; |
1da177e4 LT |
224 | } |
225 | ||
226 | /* | |
9e5987a7 DC |
227 | * Helper routine to reset inode di_forkoff field when switching |
228 | * attribute fork from local to extent format - we reset it where | |
229 | * possible to make space available for inline data fork extents. | |
1e82379b DC |
230 | */ |
231 | STATIC void | |
9e5987a7 | 232 | xfs_bmap_forkoff_reset( |
9e5987a7 DC |
233 | xfs_inode_t *ip, |
234 | int whichfork) | |
1e82379b | 235 | { |
9e5987a7 DC |
236 | if (whichfork == XFS_ATTR_FORK && |
237 | ip->i_d.di_format != XFS_DINODE_FMT_DEV && | |
238 | ip->i_d.di_format != XFS_DINODE_FMT_UUID && | |
239 | ip->i_d.di_format != XFS_DINODE_FMT_BTREE) { | |
240 | uint dfl_forkoff = xfs_default_attroffset(ip) >> 3; | |
241 | ||
242 | if (dfl_forkoff > ip->i_d.di_forkoff) | |
243 | ip->i_d.di_forkoff = dfl_forkoff; | |
244 | } | |
1e82379b DC |
245 | } |
246 | ||
9e5987a7 DC |
247 | #ifdef DEBUG |
248 | STATIC struct xfs_buf * | |
249 | xfs_bmap_get_bp( | |
250 | struct xfs_btree_cur *cur, | |
251 | xfs_fsblock_t bno) | |
252 | { | |
253 | struct xfs_log_item_desc *lidp; | |
254 | int i; | |
7574aa92 | 255 | |
9e5987a7 DC |
256 | if (!cur) |
257 | return NULL; | |
258 | ||
259 | for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { | |
260 | if (!cur->bc_bufs[i]) | |
261 | break; | |
262 | if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) | |
263 | return cur->bc_bufs[i]; | |
1da177e4 | 264 | } |
7574aa92 | 265 | |
9e5987a7 DC |
266 | /* Chase down all the log items to see if the bp is there */ |
267 | list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) { | |
268 | struct xfs_buf_log_item *bip; | |
269 | bip = (struct xfs_buf_log_item *)lidp->lid_item; | |
270 | if (bip->bli_item.li_type == XFS_LI_BUF && | |
271 | XFS_BUF_ADDR(bip->bli_buf) == bno) | |
272 | return bip->bli_buf; | |
273 | } | |
7574aa92 | 274 | |
9e5987a7 DC |
275 | return NULL; |
276 | } | |
0b1b213f | 277 | |
9e5987a7 DC |
278 | STATIC void |
279 | xfs_check_block( | |
280 | struct xfs_btree_block *block, | |
281 | xfs_mount_t *mp, | |
282 | int root, | |
283 | short sz) | |
284 | { | |
285 | int i, j, dmxr; | |
286 | __be64 *pp, *thispa; /* pointer to block address */ | |
287 | xfs_bmbt_key_t *prevp, *keyp; | |
1da177e4 | 288 | |
9e5987a7 | 289 | ASSERT(be16_to_cpu(block->bb_level) > 0); |
ec90c556 | 290 | |
9e5987a7 DC |
291 | prevp = NULL; |
292 | for( i = 1; i <= xfs_btree_get_numrecs(block); i++) { | |
293 | dmxr = mp->m_bmap_dmxr[0]; | |
294 | keyp = XFS_BMBT_KEY_ADDR(mp, block, i); | |
0b1b213f | 295 | |
9e5987a7 DC |
296 | if (prevp) { |
297 | ASSERT(be64_to_cpu(prevp->br_startoff) < | |
298 | be64_to_cpu(keyp->br_startoff)); | |
1da177e4 | 299 | } |
9e5987a7 | 300 | prevp = keyp; |
1da177e4 | 301 | |
1da177e4 | 302 | /* |
9e5987a7 | 303 | * Compare the block numbers to see if there are dups. |
1da177e4 | 304 | */ |
9e5987a7 DC |
305 | if (root) |
306 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz); | |
307 | else | |
308 | pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr); | |
0b1b213f | 309 | |
9e5987a7 DC |
310 | for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { |
311 | if (root) | |
312 | thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz); | |
313 | else | |
314 | thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr); | |
315 | if (*thispa == *pp) { | |
316 | xfs_warn(mp, "%s: thispa(%d) == pp(%d) %Ld", | |
317 | __func__, j, i, | |
318 | (unsigned long long)be64_to_cpu(*thispa)); | |
319 | panic("%s: ptrs are equal in node\n", | |
320 | __func__); | |
321 | } | |
1da177e4 | 322 | } |
9e5987a7 DC |
323 | } |
324 | } | |
1da177e4 | 325 | |
9e5987a7 DC |
326 | /* |
327 | * Check that the extents for the inode ip are in the right order in all | |
328 | * btree leaves. | |
329 | */ | |
0b1b213f | 330 | |
9e5987a7 DC |
331 | STATIC void |
332 | xfs_bmap_check_leaf_extents( | |
333 | xfs_btree_cur_t *cur, /* btree cursor or null */ | |
334 | xfs_inode_t *ip, /* incore inode pointer */ | |
335 | int whichfork) /* data or attr fork */ | |
336 | { | |
337 | struct xfs_btree_block *block; /* current btree block */ | |
338 | xfs_fsblock_t bno; /* block # of "block" */ | |
339 | xfs_buf_t *bp; /* buffer for "block" */ | |
340 | int error; /* error return value */ | |
341 | xfs_extnum_t i=0, j; /* index into the extents list */ | |
342 | xfs_ifork_t *ifp; /* fork structure */ | |
343 | int level; /* btree level, for checking */ | |
344 | xfs_mount_t *mp; /* file system mount structure */ | |
345 | __be64 *pp; /* pointer to block address */ | |
346 | xfs_bmbt_rec_t *ep; /* pointer to current extent */ | |
347 | xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */ | |
348 | xfs_bmbt_rec_t *nextp; /* pointer to next extent */ | |
349 | int bp_release = 0; | |
350 | ||
351 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) { | |
352 | return; | |
353 | } | |
354 | ||
355 | bno = NULLFSBLOCK; | |
356 | mp = ip->i_mount; | |
357 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
358 | block = ifp->if_broot; | |
359 | /* | |
360 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. | |
361 | */ | |
362 | level = be16_to_cpu(block->bb_level); | |
363 | ASSERT(level > 0); | |
364 | xfs_check_block(block, mp, 1, ifp->if_broot_bytes); | |
365 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); | |
366 | bno = be64_to_cpu(*pp); | |
367 | ||
d5cf09ba | 368 | ASSERT(bno != NULLFSBLOCK); |
9e5987a7 DC |
369 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
370 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
371 | ||
372 | /* | |
373 | * Go down the tree until leaf level is reached, following the first | |
374 | * pointer (leftmost) at each level. | |
375 | */ | |
376 | while (level-- > 0) { | |
377 | /* See if buf is in cur first */ | |
378 | bp_release = 0; | |
379 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
380 | if (!bp) { | |
381 | bp_release = 1; | |
382 | error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
383 | XFS_BMAP_BTREE_REF, | |
384 | &xfs_bmbt_buf_ops); | |
572a4cf0 | 385 | if (error) |
9e5987a7 | 386 | goto error_norelse; |
1da177e4 | 387 | } |
9e5987a7 | 388 | block = XFS_BUF_TO_BLOCK(bp); |
9e5987a7 DC |
389 | if (level == 0) |
390 | break; | |
1da177e4 | 391 | |
1da177e4 | 392 | /* |
9e5987a7 DC |
393 | * Check this block for basic sanity (increasing keys and |
394 | * no duplicate blocks). | |
1da177e4 | 395 | */ |
0b1b213f | 396 | |
9e5987a7 DC |
397 | xfs_check_block(block, mp, 0, 0); |
398 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); | |
399 | bno = be64_to_cpu(*pp); | |
c29aad41 ES |
400 | XFS_WANT_CORRUPTED_GOTO(mp, |
401 | XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
9e5987a7 DC |
402 | if (bp_release) { |
403 | bp_release = 0; | |
404 | xfs_trans_brelse(NULL, bp); | |
1da177e4 | 405 | } |
9e5987a7 | 406 | } |
ec90c556 | 407 | |
9e5987a7 DC |
408 | /* |
409 | * Here with bp and block set to the leftmost leaf node in the tree. | |
410 | */ | |
411 | i = 0; | |
412 | ||
413 | /* | |
414 | * Loop over all leaf nodes checking that all extents are in the right order. | |
415 | */ | |
416 | for (;;) { | |
417 | xfs_fsblock_t nextbno; | |
418 | xfs_extnum_t num_recs; | |
419 | ||
420 | ||
421 | num_recs = xfs_btree_get_numrecs(block); | |
1da177e4 | 422 | |
1da177e4 | 423 | /* |
9e5987a7 | 424 | * Read-ahead the next leaf block, if any. |
1da177e4 | 425 | */ |
8096b1eb | 426 | |
9e5987a7 | 427 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1da177e4 | 428 | |
1da177e4 | 429 | /* |
9e5987a7 DC |
430 | * Check all the extents to make sure they are OK. |
431 | * If we had a previous block, the last entry should | |
432 | * conform with the first entry in this one. | |
1da177e4 | 433 | */ |
ec90c556 | 434 | |
9e5987a7 DC |
435 | ep = XFS_BMBT_REC_ADDR(mp, block, 1); |
436 | if (i) { | |
437 | ASSERT(xfs_bmbt_disk_get_startoff(&last) + | |
438 | xfs_bmbt_disk_get_blockcount(&last) <= | |
439 | xfs_bmbt_disk_get_startoff(ep)); | |
440 | } | |
441 | for (j = 1; j < num_recs; j++) { | |
442 | nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1); | |
443 | ASSERT(xfs_bmbt_disk_get_startoff(ep) + | |
444 | xfs_bmbt_disk_get_blockcount(ep) <= | |
445 | xfs_bmbt_disk_get_startoff(nextp)); | |
446 | ep = nextp; | |
447 | } | |
1da177e4 | 448 | |
9e5987a7 DC |
449 | last = *ep; |
450 | i += num_recs; | |
451 | if (bp_release) { | |
452 | bp_release = 0; | |
453 | xfs_trans_brelse(NULL, bp); | |
454 | } | |
455 | bno = nextbno; | |
1da177e4 | 456 | /* |
9e5987a7 | 457 | * If we've reached the end, stop. |
1da177e4 | 458 | */ |
9e5987a7 DC |
459 | if (bno == NULLFSBLOCK) |
460 | break; | |
8096b1eb | 461 | |
9e5987a7 DC |
462 | bp_release = 0; |
463 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
464 | if (!bp) { | |
465 | bp_release = 1; | |
466 | error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
467 | XFS_BMAP_BTREE_REF, | |
468 | &xfs_bmbt_buf_ops); | |
b9b984d7 | 469 | if (error) |
9e5987a7 | 470 | goto error_norelse; |
1da177e4 | 471 | } |
9e5987a7 | 472 | block = XFS_BUF_TO_BLOCK(bp); |
a5bd606b | 473 | } |
9e5987a7 DC |
474 | if (bp_release) { |
475 | bp_release = 0; | |
476 | xfs_trans_brelse(NULL, bp); | |
a5bd606b | 477 | } |
9e5987a7 | 478 | return; |
a5bd606b | 479 | |
9e5987a7 DC |
480 | error0: |
481 | xfs_warn(mp, "%s: at error0", __func__); | |
482 | if (bp_release) | |
483 | xfs_trans_brelse(NULL, bp); | |
484 | error_norelse: | |
485 | xfs_warn(mp, "%s: BAD after btree leaves for %d extents", | |
486 | __func__, i); | |
487 | panic("%s: CORRUPTED BTREE OR SOMETHING", __func__); | |
488 | return; | |
1da177e4 LT |
489 | } |
490 | ||
491 | /* | |
9e5987a7 | 492 | * Add bmap trace insert entries for all the contents of the extent records. |
1da177e4 | 493 | */ |
9e5987a7 DC |
494 | void |
495 | xfs_bmap_trace_exlist( | |
496 | xfs_inode_t *ip, /* incore inode pointer */ | |
497 | xfs_extnum_t cnt, /* count of entries in the list */ | |
498 | int whichfork, /* data or attr fork */ | |
499 | unsigned long caller_ip) | |
1da177e4 | 500 | { |
9e5987a7 DC |
501 | xfs_extnum_t idx; /* extent record index */ |
502 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
503 | int state = 0; | |
a5bd606b | 504 | |
9e5987a7 DC |
505 | if (whichfork == XFS_ATTR_FORK) |
506 | state |= BMAP_ATTRFORK; | |
a5bd606b | 507 | |
9e5987a7 DC |
508 | ifp = XFS_IFORK_PTR(ip, whichfork); |
509 | ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); | |
510 | for (idx = 0; idx < cnt; idx++) | |
511 | trace_xfs_extlist(ip, idx, whichfork, caller_ip); | |
512 | } | |
a5bd606b | 513 | |
9e5987a7 DC |
514 | /* |
515 | * Validate that the bmbt_irecs being returned from bmapi are valid | |
a97f4df7 ZYW |
516 | * given the caller's original parameters. Specifically check the |
517 | * ranges of the returned irecs to ensure that they only extend beyond | |
9e5987a7 DC |
518 | * the given parameters if the XFS_BMAPI_ENTIRE flag was set. |
519 | */ | |
520 | STATIC void | |
521 | xfs_bmap_validate_ret( | |
522 | xfs_fileoff_t bno, | |
523 | xfs_filblks_t len, | |
524 | int flags, | |
525 | xfs_bmbt_irec_t *mval, | |
526 | int nmap, | |
527 | int ret_nmap) | |
528 | { | |
529 | int i; /* index to map values */ | |
a5bd606b | 530 | |
9e5987a7 | 531 | ASSERT(ret_nmap <= nmap); |
a5bd606b | 532 | |
9e5987a7 DC |
533 | for (i = 0; i < ret_nmap; i++) { |
534 | ASSERT(mval[i].br_blockcount > 0); | |
535 | if (!(flags & XFS_BMAPI_ENTIRE)) { | |
536 | ASSERT(mval[i].br_startoff >= bno); | |
537 | ASSERT(mval[i].br_blockcount <= len); | |
538 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= | |
539 | bno + len); | |
540 | } else { | |
541 | ASSERT(mval[i].br_startoff < bno + len); | |
542 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount > | |
543 | bno); | |
544 | } | |
545 | ASSERT(i == 0 || | |
546 | mval[i - 1].br_startoff + mval[i - 1].br_blockcount == | |
547 | mval[i].br_startoff); | |
548 | ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && | |
549 | mval[i].br_startblock != HOLESTARTBLOCK); | |
550 | ASSERT(mval[i].br_state == XFS_EXT_NORM || | |
551 | mval[i].br_state == XFS_EXT_UNWRITTEN); | |
552 | } | |
553 | } | |
7574aa92 | 554 | |
9e5987a7 DC |
555 | #else |
556 | #define xfs_bmap_check_leaf_extents(cur, ip, whichfork) do { } while (0) | |
557 | #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) | |
558 | #endif /* DEBUG */ | |
7574aa92 | 559 | |
9e5987a7 DC |
560 | /* |
561 | * bmap free list manipulation functions | |
562 | */ | |
7574aa92 | 563 | |
9e5987a7 DC |
564 | /* |
565 | * Add the extent to the list of extents to be free at transaction end. | |
566 | * The list is maintained sorted (by block number). | |
567 | */ | |
568 | void | |
569 | xfs_bmap_add_free( | |
570 | xfs_fsblock_t bno, /* fs block number of extent */ | |
571 | xfs_filblks_t len, /* length of extent */ | |
572 | xfs_bmap_free_t *flist, /* list of extents */ | |
573 | xfs_mount_t *mp) /* mount point structure */ | |
574 | { | |
575 | xfs_bmap_free_item_t *cur; /* current (next) element */ | |
576 | xfs_bmap_free_item_t *new; /* new element */ | |
577 | xfs_bmap_free_item_t *prev; /* previous element */ | |
578 | #ifdef DEBUG | |
579 | xfs_agnumber_t agno; | |
580 | xfs_agblock_t agbno; | |
581 | ||
582 | ASSERT(bno != NULLFSBLOCK); | |
583 | ASSERT(len > 0); | |
584 | ASSERT(len <= MAXEXTLEN); | |
585 | ASSERT(!isnullstartblock(bno)); | |
586 | agno = XFS_FSB_TO_AGNO(mp, bno); | |
587 | agbno = XFS_FSB_TO_AGBNO(mp, bno); | |
588 | ASSERT(agno < mp->m_sb.sb_agcount); | |
589 | ASSERT(agbno < mp->m_sb.sb_agblocks); | |
590 | ASSERT(len < mp->m_sb.sb_agblocks); | |
591 | ASSERT(agbno + len <= mp->m_sb.sb_agblocks); | |
592 | #endif | |
593 | ASSERT(xfs_bmap_free_item_zone != NULL); | |
594 | new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP); | |
595 | new->xbfi_startblock = bno; | |
596 | new->xbfi_blockcount = (xfs_extlen_t)len; | |
597 | for (prev = NULL, cur = flist->xbf_first; | |
598 | cur != NULL; | |
599 | prev = cur, cur = cur->xbfi_next) { | |
600 | if (cur->xbfi_startblock >= bno) | |
601 | break; | |
1da177e4 | 602 | } |
9e5987a7 DC |
603 | if (prev) |
604 | prev->xbfi_next = new; | |
605 | else | |
606 | flist->xbf_first = new; | |
607 | new->xbfi_next = cur; | |
608 | flist->xbf_count++; | |
609 | } | |
7574aa92 | 610 | |
9e5987a7 DC |
611 | /* |
612 | * Remove the entry "free" from the free item list. Prev points to the | |
613 | * previous entry, unless "free" is the head of the list. | |
614 | */ | |
68988114 | 615 | void |
9e5987a7 DC |
616 | xfs_bmap_del_free( |
617 | xfs_bmap_free_t *flist, /* free item list header */ | |
618 | xfs_bmap_free_item_t *prev, /* previous item on list, if any */ | |
619 | xfs_bmap_free_item_t *free) /* list item to be freed */ | |
620 | { | |
621 | if (prev) | |
622 | prev->xbfi_next = free->xbfi_next; | |
623 | else | |
624 | flist->xbf_first = free->xbfi_next; | |
625 | flist->xbf_count--; | |
626 | kmem_zone_free(xfs_bmap_free_item_zone, free); | |
627 | } | |
628 | ||
9e5987a7 DC |
629 | /* |
630 | * Free up any items left in the list. | |
631 | */ | |
632 | void | |
633 | xfs_bmap_cancel( | |
634 | xfs_bmap_free_t *flist) /* list of bmap_free_items */ | |
635 | { | |
636 | xfs_bmap_free_item_t *free; /* free list item */ | |
637 | xfs_bmap_free_item_t *next; | |
ec90c556 | 638 | |
9e5987a7 DC |
639 | if (flist->xbf_count == 0) |
640 | return; | |
641 | ASSERT(flist->xbf_first != NULL); | |
642 | for (free = flist->xbf_first; free; free = next) { | |
643 | next = free->xbfi_next; | |
644 | xfs_bmap_del_free(flist, NULL, free); | |
645 | } | |
646 | ASSERT(flist->xbf_count == 0); | |
647 | } | |
0b1b213f | 648 | |
9e5987a7 DC |
649 | /* |
650 | * Inode fork format manipulation functions | |
651 | */ | |
1da177e4 | 652 | |
9e5987a7 DC |
653 | /* |
654 | * Transform a btree format file with only one leaf node, where the | |
655 | * extents list will fit in the inode, into an extents format file. | |
656 | * Since the file extents are already in-core, all we have to do is | |
657 | * give up the space for the btree root and pitch the leaf block. | |
658 | */ | |
659 | STATIC int /* error */ | |
660 | xfs_bmap_btree_to_extents( | |
661 | xfs_trans_t *tp, /* transaction pointer */ | |
662 | xfs_inode_t *ip, /* incore inode pointer */ | |
663 | xfs_btree_cur_t *cur, /* btree cursor */ | |
664 | int *logflagsp, /* inode logging flags */ | |
665 | int whichfork) /* data or attr fork */ | |
666 | { | |
667 | /* REFERENCED */ | |
668 | struct xfs_btree_block *cblock;/* child btree block */ | |
669 | xfs_fsblock_t cbno; /* child block number */ | |
670 | xfs_buf_t *cbp; /* child block's buffer */ | |
671 | int error; /* error return value */ | |
672 | xfs_ifork_t *ifp; /* inode fork data */ | |
673 | xfs_mount_t *mp; /* mount point structure */ | |
674 | __be64 *pp; /* ptr to block address */ | |
675 | struct xfs_btree_block *rblock;/* root btree block */ | |
1da177e4 | 676 | |
9e5987a7 DC |
677 | mp = ip->i_mount; |
678 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
679 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
680 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
681 | rblock = ifp->if_broot; | |
682 | ASSERT(be16_to_cpu(rblock->bb_level) == 1); | |
683 | ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); | |
684 | ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1); | |
685 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes); | |
686 | cbno = be64_to_cpu(*pp); | |
687 | *logflagsp = 0; | |
688 | #ifdef DEBUG | |
689 | if ((error = xfs_btree_check_lptr(cur, cbno, 1))) | |
690 | return error; | |
691 | #endif | |
692 | error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF, | |
693 | &xfs_bmbt_buf_ops); | |
694 | if (error) | |
695 | return error; | |
696 | cblock = XFS_BUF_TO_BLOCK(cbp); | |
697 | if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) | |
698 | return error; | |
699 | xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp); | |
700 | ip->i_d.di_nblocks--; | |
701 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); | |
702 | xfs_trans_binval(tp, cbp); | |
703 | if (cur->bc_bufs[0] == cbp) | |
704 | cur->bc_bufs[0] = NULL; | |
705 | xfs_iroot_realloc(ip, -1, whichfork); | |
706 | ASSERT(ifp->if_broot == NULL); | |
707 | ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); | |
708 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
709 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
710 | return 0; | |
711 | } | |
0b1b213f | 712 | |
9e5987a7 DC |
713 | /* |
714 | * Convert an extents-format file into a btree-format file. | |
715 | * The new file will have a root block (in the inode) and a single child block. | |
716 | */ | |
717 | STATIC int /* error */ | |
718 | xfs_bmap_extents_to_btree( | |
719 | xfs_trans_t *tp, /* transaction pointer */ | |
720 | xfs_inode_t *ip, /* incore inode pointer */ | |
721 | xfs_fsblock_t *firstblock, /* first-block-allocated */ | |
722 | xfs_bmap_free_t *flist, /* blocks freed in xaction */ | |
723 | xfs_btree_cur_t **curp, /* cursor returned to caller */ | |
724 | int wasdel, /* converting a delayed alloc */ | |
725 | int *logflagsp, /* inode logging flags */ | |
726 | int whichfork) /* data or attr fork */ | |
727 | { | |
728 | struct xfs_btree_block *ablock; /* allocated (child) bt block */ | |
729 | xfs_buf_t *abp; /* buffer for ablock */ | |
730 | xfs_alloc_arg_t args; /* allocation arguments */ | |
731 | xfs_bmbt_rec_t *arp; /* child record pointer */ | |
732 | struct xfs_btree_block *block; /* btree root block */ | |
733 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
734 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
735 | int error; /* error return value */ | |
736 | xfs_extnum_t i, cnt; /* extent record index */ | |
737 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
738 | xfs_bmbt_key_t *kp; /* root block key pointer */ | |
739 | xfs_mount_t *mp; /* mount structure */ | |
740 | xfs_extnum_t nextents; /* number of file extents */ | |
741 | xfs_bmbt_ptr_t *pp; /* root block address pointer */ | |
1da177e4 | 742 | |
ee1a47ab | 743 | mp = ip->i_mount; |
9e5987a7 DC |
744 | ifp = XFS_IFORK_PTR(ip, whichfork); |
745 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); | |
0b1b213f | 746 | |
9e5987a7 DC |
747 | /* |
748 | * Make space in the inode incore. | |
749 | */ | |
750 | xfs_iroot_realloc(ip, 1, whichfork); | |
751 | ifp->if_flags |= XFS_IFBROOT; | |
ec90c556 | 752 | |
9e5987a7 DC |
753 | /* |
754 | * Fill in the root. | |
755 | */ | |
756 | block = ifp->if_broot; | |
ee1a47ab CH |
757 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
758 | xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, | |
759 | XFS_BMAP_CRC_MAGIC, 1, 1, ip->i_ino, | |
760 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
761 | else | |
762 | xfs_btree_init_block_int(mp, block, XFS_BUF_DADDR_NULL, | |
763 | XFS_BMAP_MAGIC, 1, 1, ip->i_ino, | |
764 | XFS_BTREE_LONG_PTRS); | |
0b1b213f | 765 | |
9e5987a7 DC |
766 | /* |
767 | * Need a cursor. Can't allocate until bb_level is filled in. | |
768 | */ | |
9e5987a7 DC |
769 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); |
770 | cur->bc_private.b.firstblock = *firstblock; | |
771 | cur->bc_private.b.flist = flist; | |
772 | cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; | |
773 | /* | |
774 | * Convert to a btree with two levels, one record in root. | |
775 | */ | |
776 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); | |
777 | memset(&args, 0, sizeof(args)); | |
778 | args.tp = tp; | |
779 | args.mp = mp; | |
780 | args.firstblock = *firstblock; | |
781 | if (*firstblock == NULLFSBLOCK) { | |
782 | args.type = XFS_ALLOCTYPE_START_BNO; | |
783 | args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); | |
784 | } else if (flist->xbf_low) { | |
785 | args.type = XFS_ALLOCTYPE_START_BNO; | |
786 | args.fsbno = *firstblock; | |
787 | } else { | |
788 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
789 | args.fsbno = *firstblock; | |
790 | } | |
791 | args.minlen = args.maxlen = args.prod = 1; | |
792 | args.wasdel = wasdel; | |
793 | *logflagsp = 0; | |
794 | if ((error = xfs_alloc_vextent(&args))) { | |
795 | xfs_iroot_realloc(ip, -1, whichfork); | |
796 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
797 | return error; | |
798 | } | |
799 | /* | |
800 | * Allocation can't fail, the space was reserved. | |
801 | */ | |
802 | ASSERT(args.fsbno != NULLFSBLOCK); | |
803 | ASSERT(*firstblock == NULLFSBLOCK || | |
804 | args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) || | |
805 | (flist->xbf_low && | |
806 | args.agno > XFS_FSB_TO_AGNO(mp, *firstblock))); | |
807 | *firstblock = cur->bc_private.b.firstblock = args.fsbno; | |
808 | cur->bc_private.b.allocated++; | |
809 | ip->i_d.di_nblocks++; | |
810 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); | |
811 | abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0); | |
812 | /* | |
813 | * Fill in the child block. | |
814 | */ | |
815 | abp->b_ops = &xfs_bmbt_buf_ops; | |
816 | ablock = XFS_BUF_TO_BLOCK(abp); | |
ee1a47ab CH |
817 | if (xfs_sb_version_hascrc(&mp->m_sb)) |
818 | xfs_btree_init_block_int(mp, ablock, abp->b_bn, | |
819 | XFS_BMAP_CRC_MAGIC, 0, 0, ip->i_ino, | |
820 | XFS_BTREE_LONG_PTRS | XFS_BTREE_CRC_BLOCKS); | |
821 | else | |
822 | xfs_btree_init_block_int(mp, ablock, abp->b_bn, | |
823 | XFS_BMAP_MAGIC, 0, 0, ip->i_ino, | |
824 | XFS_BTREE_LONG_PTRS); | |
825 | ||
9e5987a7 DC |
826 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); |
827 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
828 | for (cnt = i = 0; i < nextents; i++) { | |
829 | ep = xfs_iext_get_ext(ifp, i); | |
830 | if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) { | |
831 | arp->l0 = cpu_to_be64(ep->l0); | |
832 | arp->l1 = cpu_to_be64(ep->l1); | |
833 | arp++; cnt++; | |
1da177e4 | 834 | } |
9e5987a7 DC |
835 | } |
836 | ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork)); | |
837 | xfs_btree_set_numrecs(ablock, cnt); | |
1da177e4 | 838 | |
9e5987a7 DC |
839 | /* |
840 | * Fill in the root key and pointer. | |
841 | */ | |
842 | kp = XFS_BMBT_KEY_ADDR(mp, block, 1); | |
843 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); | |
844 | kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp)); | |
845 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur, | |
846 | be16_to_cpu(block->bb_level))); | |
847 | *pp = cpu_to_be64(args.fsbno); | |
ec90c556 | 848 | |
9e5987a7 DC |
849 | /* |
850 | * Do all this logging at the end so that | |
851 | * the root is at the right level. | |
852 | */ | |
853 | xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS); | |
854 | xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); | |
855 | ASSERT(*curp == NULL); | |
856 | *curp = cur; | |
857 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork); | |
858 | return 0; | |
859 | } | |
ec90c556 | 860 | |
9e5987a7 DC |
861 | /* |
862 | * Convert a local file to an extents file. | |
863 | * This code is out of bounds for data forks of regular files, | |
864 | * since the file data needs to get logged so things will stay consistent. | |
865 | * (The bmap-level manipulations are ok, though). | |
866 | */ | |
f3508bcd DC |
867 | void |
868 | xfs_bmap_local_to_extents_empty( | |
869 | struct xfs_inode *ip, | |
870 | int whichfork) | |
871 | { | |
872 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
873 | ||
874 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
875 | ASSERT(ifp->if_bytes == 0); | |
876 | ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); | |
877 | ||
6a9edd3d | 878 | xfs_bmap_forkoff_reset(ip, whichfork); |
f3508bcd DC |
879 | ifp->if_flags &= ~XFS_IFINLINE; |
880 | ifp->if_flags |= XFS_IFEXTENTS; | |
881 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
882 | } | |
883 | ||
884 | ||
9e5987a7 DC |
885 | STATIC int /* error */ |
886 | xfs_bmap_local_to_extents( | |
887 | xfs_trans_t *tp, /* transaction pointer */ | |
888 | xfs_inode_t *ip, /* incore inode pointer */ | |
889 | xfs_fsblock_t *firstblock, /* first block allocated in xaction */ | |
890 | xfs_extlen_t total, /* total blocks needed by transaction */ | |
891 | int *logflagsp, /* inode logging flags */ | |
892 | int whichfork, | |
ee1a47ab CH |
893 | void (*init_fn)(struct xfs_trans *tp, |
894 | struct xfs_buf *bp, | |
9e5987a7 DC |
895 | struct xfs_inode *ip, |
896 | struct xfs_ifork *ifp)) | |
897 | { | |
f3508bcd | 898 | int error = 0; |
9e5987a7 DC |
899 | int flags; /* logging flags returned */ |
900 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
f3508bcd DC |
901 | xfs_alloc_arg_t args; /* allocation arguments */ |
902 | xfs_buf_t *bp; /* buffer for extent block */ | |
903 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
0b1b213f | 904 | |
9e5987a7 DC |
905 | /* |
906 | * We don't want to deal with the case of keeping inode data inline yet. | |
907 | * So sending the data fork of a regular inode is invalid. | |
908 | */ | |
909 | ASSERT(!(S_ISREG(ip->i_d.di_mode) && whichfork == XFS_DATA_FORK)); | |
910 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
911 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
f3508bcd DC |
912 | |
913 | if (!ifp->if_bytes) { | |
914 | xfs_bmap_local_to_extents_empty(ip, whichfork); | |
915 | flags = XFS_ILOG_CORE; | |
916 | goto done; | |
917 | } | |
918 | ||
9e5987a7 DC |
919 | flags = 0; |
920 | error = 0; | |
f3508bcd DC |
921 | ASSERT((ifp->if_flags & (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == |
922 | XFS_IFINLINE); | |
923 | memset(&args, 0, sizeof(args)); | |
924 | args.tp = tp; | |
925 | args.mp = ip->i_mount; | |
926 | args.firstblock = *firstblock; | |
927 | /* | |
928 | * Allocate a block. We know we need only one, since the | |
929 | * file currently fits in an inode. | |
930 | */ | |
931 | if (*firstblock == NULLFSBLOCK) { | |
932 | args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); | |
933 | args.type = XFS_ALLOCTYPE_START_BNO; | |
9e5987a7 | 934 | } else { |
f3508bcd DC |
935 | args.fsbno = *firstblock; |
936 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
9e5987a7 | 937 | } |
f3508bcd DC |
938 | args.total = total; |
939 | args.minlen = args.maxlen = args.prod = 1; | |
940 | error = xfs_alloc_vextent(&args); | |
941 | if (error) | |
942 | goto done; | |
943 | ||
944 | /* Can't fail, the space was reserved. */ | |
945 | ASSERT(args.fsbno != NULLFSBLOCK); | |
946 | ASSERT(args.len == 1); | |
947 | *firstblock = args.fsbno; | |
948 | bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); | |
949 | ||
fe22d552 DC |
950 | /* |
951 | * Initialise the block and copy the data | |
952 | * | |
953 | * Note: init_fn must set the buffer log item type correctly! | |
954 | */ | |
f3508bcd DC |
955 | init_fn(tp, bp, ip, ifp); |
956 | ||
957 | /* account for the change in fork size and log everything */ | |
958 | xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1); | |
959 | xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); | |
960 | xfs_bmap_local_to_extents_empty(ip, whichfork); | |
9e5987a7 | 961 | flags |= XFS_ILOG_CORE; |
f3508bcd DC |
962 | |
963 | xfs_iext_add(ifp, 0, 1); | |
964 | ep = xfs_iext_get_ext(ifp, 0); | |
965 | xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM); | |
966 | trace_xfs_bmap_post_update(ip, 0, | |
967 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0, | |
968 | _THIS_IP_); | |
969 | XFS_IFORK_NEXT_SET(ip, whichfork, 1); | |
970 | ip->i_d.di_nblocks = 1; | |
971 | xfs_trans_mod_dquot_byino(tp, ip, | |
972 | XFS_TRANS_DQ_BCOUNT, 1L); | |
973 | flags |= xfs_ilog_fext(whichfork); | |
974 | ||
9e5987a7 DC |
975 | done: |
976 | *logflagsp = flags; | |
977 | return error; | |
978 | } | |
ec90c556 | 979 | |
9e5987a7 DC |
980 | /* |
981 | * Called from xfs_bmap_add_attrfork to handle btree format files. | |
982 | */ | |
983 | STATIC int /* error */ | |
984 | xfs_bmap_add_attrfork_btree( | |
985 | xfs_trans_t *tp, /* transaction pointer */ | |
986 | xfs_inode_t *ip, /* incore inode pointer */ | |
987 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
988 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
989 | int *flags) /* inode logging flags */ | |
990 | { | |
991 | xfs_btree_cur_t *cur; /* btree cursor */ | |
992 | int error; /* error return value */ | |
993 | xfs_mount_t *mp; /* file system mount struct */ | |
994 | int stat; /* newroot status */ | |
ec90c556 | 995 | |
9e5987a7 DC |
996 | mp = ip->i_mount; |
997 | if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip)) | |
998 | *flags |= XFS_ILOG_DBROOT; | |
999 | else { | |
1000 | cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); | |
1001 | cur->bc_private.b.flist = flist; | |
1002 | cur->bc_private.b.firstblock = *firstblock; | |
1003 | if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat))) | |
1004 | goto error0; | |
1005 | /* must be at least one entry */ | |
c29aad41 | 1006 | XFS_WANT_CORRUPTED_GOTO(mp, stat == 1, error0); |
9e5987a7 DC |
1007 | if ((error = xfs_btree_new_iroot(cur, flags, &stat))) |
1008 | goto error0; | |
1009 | if (stat == 0) { | |
1010 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
2451337d | 1011 | return -ENOSPC; |
1da177e4 | 1012 | } |
9e5987a7 DC |
1013 | *firstblock = cur->bc_private.b.firstblock; |
1014 | cur->bc_private.b.allocated = 0; | |
1015 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
1da177e4 | 1016 | } |
9e5987a7 DC |
1017 | return 0; |
1018 | error0: | |
1019 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
1020 | return error; | |
1021 | } | |
a5bd606b | 1022 | |
9e5987a7 DC |
1023 | /* |
1024 | * Called from xfs_bmap_add_attrfork to handle extents format files. | |
1025 | */ | |
1026 | STATIC int /* error */ | |
1027 | xfs_bmap_add_attrfork_extents( | |
1028 | xfs_trans_t *tp, /* transaction pointer */ | |
1029 | xfs_inode_t *ip, /* incore inode pointer */ | |
1030 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
1031 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
1032 | int *flags) /* inode logging flags */ | |
1033 | { | |
1034 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
1035 | int error; /* error return value */ | |
a5bd606b | 1036 | |
9e5987a7 DC |
1037 | if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip)) |
1038 | return 0; | |
1039 | cur = NULL; | |
1040 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0, | |
1041 | flags, XFS_DATA_FORK); | |
a5bd606b CH |
1042 | if (cur) { |
1043 | cur->bc_private.b.allocated = 0; | |
9e5987a7 DC |
1044 | xfs_btree_del_cursor(cur, |
1045 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
a5bd606b | 1046 | } |
1da177e4 | 1047 | return error; |
1da177e4 LT |
1048 | } |
1049 | ||
9e5987a7 DC |
1050 | /* |
1051 | * Called from xfs_bmap_add_attrfork to handle local format files. Each | |
1052 | * different data fork content type needs a different callout to do the | |
1053 | * conversion. Some are basic and only require special block initialisation | |
1054 | * callouts for the data formating, others (directories) are so specialised they | |
1055 | * handle everything themselves. | |
1056 | * | |
1057 | * XXX (dgc): investigate whether directory conversion can use the generic | |
1058 | * formatting callout. It should be possible - it's just a very complex | |
ee1a47ab | 1059 | * formatter. |
9e5987a7 DC |
1060 | */ |
1061 | STATIC int /* error */ | |
1062 | xfs_bmap_add_attrfork_local( | |
1063 | xfs_trans_t *tp, /* transaction pointer */ | |
1064 | xfs_inode_t *ip, /* incore inode pointer */ | |
1065 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
1066 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
1067 | int *flags) /* inode logging flags */ | |
1068 | { | |
1069 | xfs_da_args_t dargs; /* args for dir/attr code */ | |
7574aa92 | 1070 | |
9e5987a7 DC |
1071 | if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) |
1072 | return 0; | |
7574aa92 | 1073 | |
9e5987a7 DC |
1074 | if (S_ISDIR(ip->i_d.di_mode)) { |
1075 | memset(&dargs, 0, sizeof(dargs)); | |
d6cf1305 | 1076 | dargs.geo = ip->i_mount->m_dir_geo; |
9e5987a7 DC |
1077 | dargs.dp = ip; |
1078 | dargs.firstblock = firstblock; | |
1079 | dargs.flist = flist; | |
d6cf1305 | 1080 | dargs.total = dargs.geo->fsbcount; |
9e5987a7 DC |
1081 | dargs.whichfork = XFS_DATA_FORK; |
1082 | dargs.trans = tp; | |
1083 | return xfs_dir2_sf_to_block(&dargs); | |
1da177e4 | 1084 | } |
7574aa92 | 1085 | |
9e5987a7 DC |
1086 | if (S_ISLNK(ip->i_d.di_mode)) |
1087 | return xfs_bmap_local_to_extents(tp, ip, firstblock, 1, | |
1088 | flags, XFS_DATA_FORK, | |
1089 | xfs_symlink_local_to_remote); | |
7574aa92 | 1090 | |
f3508bcd DC |
1091 | /* should only be called for types that support local format data */ |
1092 | ASSERT(0); | |
2451337d | 1093 | return -EFSCORRUPTED; |
9e5987a7 | 1094 | } |
0b1b213f | 1095 | |
9e5987a7 DC |
1096 | /* |
1097 | * Convert inode from non-attributed to attributed. | |
1098 | * Must not be in a transaction, ip must not be locked. | |
1099 | */ | |
1100 | int /* error code */ | |
1101 | xfs_bmap_add_attrfork( | |
1102 | xfs_inode_t *ip, /* incore inode pointer */ | |
1103 | int size, /* space new attribute needs */ | |
1104 | int rsvd) /* xact may use reserved blks */ | |
1105 | { | |
1106 | xfs_fsblock_t firstblock; /* 1st block/ag allocated */ | |
1107 | xfs_bmap_free_t flist; /* freed extent records */ | |
1108 | xfs_mount_t *mp; /* mount structure */ | |
1109 | xfs_trans_t *tp; /* transaction pointer */ | |
1110 | int blks; /* space reservation */ | |
1111 | int version = 1; /* superblock attr version */ | |
1112 | int committed; /* xaction was committed */ | |
1113 | int logflags; /* logging flags */ | |
1114 | int error; /* error return value */ | |
9e3908e3 | 1115 | int cancel_flags = 0; |
0b1b213f | 1116 | |
9e5987a7 | 1117 | ASSERT(XFS_IFORK_Q(ip) == 0); |
1da177e4 | 1118 | |
9e5987a7 DC |
1119 | mp = ip->i_mount; |
1120 | ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); | |
1121 | tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK); | |
1122 | blks = XFS_ADDAFORK_SPACE_RES(mp); | |
1123 | if (rsvd) | |
1124 | tp->t_flags |= XFS_TRANS_RESERVE; | |
3d3c8b52 | 1125 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_addafork, blks, 0); |
9e3908e3 MT |
1126 | if (error) { |
1127 | xfs_trans_cancel(tp, 0); | |
1128 | return error; | |
1129 | } | |
1130 | cancel_flags = XFS_TRANS_RELEASE_LOG_RES; | |
9e5987a7 DC |
1131 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
1132 | error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ? | |
1133 | XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : | |
1134 | XFS_QMOPT_RES_REGBLKS); | |
9e3908e3 MT |
1135 | if (error) |
1136 | goto trans_cancel; | |
1137 | cancel_flags |= XFS_TRANS_ABORT; | |
9e5987a7 | 1138 | if (XFS_IFORK_Q(ip)) |
9e3908e3 | 1139 | goto trans_cancel; |
9e5987a7 | 1140 | if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) { |
1da177e4 | 1141 | /* |
9e5987a7 | 1142 | * For inodes coming from pre-6.2 filesystems. |
1da177e4 | 1143 | */ |
9e5987a7 DC |
1144 | ASSERT(ip->i_d.di_aformat == 0); |
1145 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
1146 | } | |
1147 | ASSERT(ip->i_d.di_anextents == 0); | |
ec90c556 | 1148 | |
9e3908e3 | 1149 | xfs_trans_ijoin(tp, ip, 0); |
9e5987a7 | 1150 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
1da177e4 | 1151 | |
9e5987a7 DC |
1152 | switch (ip->i_d.di_format) { |
1153 | case XFS_DINODE_FMT_DEV: | |
1154 | ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; | |
1155 | break; | |
1156 | case XFS_DINODE_FMT_UUID: | |
1157 | ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3; | |
1158 | break; | |
1159 | case XFS_DINODE_FMT_LOCAL: | |
1160 | case XFS_DINODE_FMT_EXTENTS: | |
1161 | case XFS_DINODE_FMT_BTREE: | |
1162 | ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size); | |
1163 | if (!ip->i_d.di_forkoff) | |
1164 | ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3; | |
1165 | else if (mp->m_flags & XFS_MOUNT_ATTR2) | |
1166 | version = 2; | |
1da177e4 | 1167 | break; |
9e5987a7 DC |
1168 | default: |
1169 | ASSERT(0); | |
2451337d | 1170 | error = -EINVAL; |
9e3908e3 | 1171 | goto trans_cancel; |
9e5987a7 | 1172 | } |
1da177e4 | 1173 | |
9e5987a7 DC |
1174 | ASSERT(ip->i_afp == NULL); |
1175 | ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); | |
1176 | ip->i_afp->if_flags = XFS_IFEXTENTS; | |
1177 | logflags = 0; | |
1178 | xfs_bmap_init(&flist, &firstblock); | |
1179 | switch (ip->i_d.di_format) { | |
1180 | case XFS_DINODE_FMT_LOCAL: | |
1181 | error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist, | |
1182 | &logflags); | |
1183 | break; | |
1184 | case XFS_DINODE_FMT_EXTENTS: | |
1185 | error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock, | |
1186 | &flist, &logflags); | |
1187 | break; | |
1188 | case XFS_DINODE_FMT_BTREE: | |
1189 | error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist, | |
1190 | &logflags); | |
1191 | break; | |
1192 | default: | |
1193 | error = 0; | |
1da177e4 LT |
1194 | break; |
1195 | } | |
9e5987a7 DC |
1196 | if (logflags) |
1197 | xfs_trans_log_inode(tp, ip, logflags); | |
1198 | if (error) | |
9e3908e3 | 1199 | goto bmap_cancel; |
9e5987a7 DC |
1200 | if (!xfs_sb_version_hasattr(&mp->m_sb) || |
1201 | (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) { | |
61e63ecb | 1202 | bool log_sb = false; |
9e5987a7 DC |
1203 | |
1204 | spin_lock(&mp->m_sb_lock); | |
1205 | if (!xfs_sb_version_hasattr(&mp->m_sb)) { | |
1206 | xfs_sb_version_addattr(&mp->m_sb); | |
61e63ecb | 1207 | log_sb = true; |
9e5987a7 DC |
1208 | } |
1209 | if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) { | |
1210 | xfs_sb_version_addattr2(&mp->m_sb); | |
61e63ecb | 1211 | log_sb = true; |
9e5987a7 | 1212 | } |
4d11a402 | 1213 | spin_unlock(&mp->m_sb_lock); |
61e63ecb DC |
1214 | if (log_sb) |
1215 | xfs_log_sb(tp); | |
1da177e4 | 1216 | } |
9e5987a7 DC |
1217 | |
1218 | error = xfs_bmap_finish(&tp, &flist, &committed); | |
1219 | if (error) | |
9e3908e3 MT |
1220 | goto bmap_cancel; |
1221 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
1222 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1223 | return error; | |
1224 | ||
1225 | bmap_cancel: | |
9e5987a7 | 1226 | xfs_bmap_cancel(&flist); |
9e3908e3 MT |
1227 | trans_cancel: |
1228 | xfs_trans_cancel(tp, cancel_flags); | |
9e5987a7 | 1229 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
9e5987a7 | 1230 | return error; |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | /* | |
9e5987a7 | 1234 | * Internal and external extent tree search functions. |
1da177e4 | 1235 | */ |
a5bd606b | 1236 | |
9e5987a7 DC |
1237 | /* |
1238 | * Read in the extents to if_extents. | |
1239 | * All inode fields are set up by caller, we just traverse the btree | |
1240 | * and copy the records in. If the file system cannot contain unwritten | |
1241 | * extents, the records are checked for no "state" flags. | |
1242 | */ | |
1243 | int /* error */ | |
1244 | xfs_bmap_read_extents( | |
1245 | xfs_trans_t *tp, /* transaction pointer */ | |
1246 | xfs_inode_t *ip, /* incore inode */ | |
1247 | int whichfork) /* data or attr fork */ | |
1248 | { | |
1249 | struct xfs_btree_block *block; /* current btree block */ | |
1250 | xfs_fsblock_t bno; /* block # of "block" */ | |
1251 | xfs_buf_t *bp; /* buffer for "block" */ | |
1252 | int error; /* error return value */ | |
1253 | xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */ | |
1254 | xfs_extnum_t i, j; /* index into the extents list */ | |
1255 | xfs_ifork_t *ifp; /* fork structure */ | |
1256 | int level; /* btree level, for checking */ | |
1257 | xfs_mount_t *mp; /* file system mount structure */ | |
1258 | __be64 *pp; /* pointer to block address */ | |
1259 | /* REFERENCED */ | |
1260 | xfs_extnum_t room; /* number of entries there's room for */ | |
6ef35544 | 1261 | |
9e5987a7 DC |
1262 | bno = NULLFSBLOCK; |
1263 | mp = ip->i_mount; | |
1264 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1265 | exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE : | |
1266 | XFS_EXTFMT_INODE(ip); | |
1267 | block = ifp->if_broot; | |
1da177e4 | 1268 | /* |
9e5987a7 | 1269 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. |
1da177e4 | 1270 | */ |
9e5987a7 DC |
1271 | level = be16_to_cpu(block->bb_level); |
1272 | ASSERT(level > 0); | |
1273 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); | |
1274 | bno = be64_to_cpu(*pp); | |
d5cf09ba | 1275 | ASSERT(bno != NULLFSBLOCK); |
9e5987a7 DC |
1276 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); |
1277 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
1da177e4 | 1278 | /* |
9e5987a7 DC |
1279 | * Go down the tree until leaf level is reached, following the first |
1280 | * pointer (leftmost) at each level. | |
1da177e4 | 1281 | */ |
9e5987a7 DC |
1282 | while (level-- > 0) { |
1283 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
1284 | XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); | |
1285 | if (error) | |
1286 | return error; | |
1287 | block = XFS_BUF_TO_BLOCK(bp); | |
9e5987a7 DC |
1288 | if (level == 0) |
1289 | break; | |
1290 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); | |
1291 | bno = be64_to_cpu(*pp); | |
c29aad41 ES |
1292 | XFS_WANT_CORRUPTED_GOTO(mp, |
1293 | XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
9e5987a7 | 1294 | xfs_trans_brelse(tp, bp); |
1da177e4 LT |
1295 | } |
1296 | /* | |
9e5987a7 | 1297 | * Here with bp and block set to the leftmost leaf node in the tree. |
1da177e4 | 1298 | */ |
9e5987a7 DC |
1299 | room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
1300 | i = 0; | |
1da177e4 | 1301 | /* |
9e5987a7 | 1302 | * Loop over all leaf nodes. Copy information to the extent records. |
1da177e4 | 1303 | */ |
9e5987a7 DC |
1304 | for (;;) { |
1305 | xfs_bmbt_rec_t *frp; | |
1306 | xfs_fsblock_t nextbno; | |
1307 | xfs_extnum_t num_recs; | |
1308 | xfs_extnum_t start; | |
0b1b213f | 1309 | |
9e5987a7 DC |
1310 | num_recs = xfs_btree_get_numrecs(block); |
1311 | if (unlikely(i + num_recs > room)) { | |
1312 | ASSERT(i + num_recs <= room); | |
1313 | xfs_warn(ip->i_mount, | |
1314 | "corrupt dinode %Lu, (btree extents).", | |
1315 | (unsigned long long) ip->i_ino); | |
1316 | XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)", | |
1317 | XFS_ERRLEVEL_LOW, ip->i_mount, block); | |
1318 | goto error0; | |
1da177e4 | 1319 | } |
1da177e4 | 1320 | /* |
9e5987a7 | 1321 | * Read-ahead the next leaf block, if any. |
1da177e4 | 1322 | */ |
9e5987a7 DC |
1323 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1324 | if (nextbno != NULLFSBLOCK) | |
1325 | xfs_btree_reada_bufl(mp, nextbno, 1, | |
1326 | &xfs_bmbt_buf_ops); | |
1da177e4 | 1327 | /* |
9e5987a7 | 1328 | * Copy records into the extent records. |
1da177e4 | 1329 | */ |
9e5987a7 DC |
1330 | frp = XFS_BMBT_REC_ADDR(mp, block, 1); |
1331 | start = i; | |
1332 | for (j = 0; j < num_recs; j++, i++, frp++) { | |
1333 | xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i); | |
1334 | trp->l0 = be64_to_cpu(frp->l0); | |
1335 | trp->l1 = be64_to_cpu(frp->l1); | |
1da177e4 | 1336 | } |
9e5987a7 DC |
1337 | if (exntf == XFS_EXTFMT_NOSTATE) { |
1338 | /* | |
1339 | * Check all attribute bmap btree records and | |
1340 | * any "older" data bmap btree records for a | |
1341 | * set bit in the "extent flag" position. | |
1342 | */ | |
1343 | if (unlikely(xfs_check_nostate_extents(ifp, | |
1344 | start, num_recs))) { | |
1345 | XFS_ERROR_REPORT("xfs_bmap_read_extents(2)", | |
1346 | XFS_ERRLEVEL_LOW, | |
1347 | ip->i_mount); | |
1348 | goto error0; | |
1349 | } | |
1350 | } | |
1351 | xfs_trans_brelse(tp, bp); | |
1352 | bno = nextbno; | |
1da177e4 | 1353 | /* |
9e5987a7 | 1354 | * If we've reached the end, stop. |
1da177e4 | 1355 | */ |
9e5987a7 DC |
1356 | if (bno == NULLFSBLOCK) |
1357 | break; | |
1358 | error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
1359 | XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops); | |
1360 | if (error) | |
1361 | return error; | |
1362 | block = XFS_BUF_TO_BLOCK(bp); | |
1da177e4 | 1363 | } |
9e5987a7 DC |
1364 | ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); |
1365 | ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork)); | |
1366 | XFS_BMAP_TRACE_EXLIST(ip, i, whichfork); | |
1367 | return 0; | |
1368 | error0: | |
1369 | xfs_trans_brelse(tp, bp); | |
2451337d | 1370 | return -EFSCORRUPTED; |
9e5987a7 | 1371 | } |
a5bd606b | 1372 | |
a5bd606b | 1373 | |
9e5987a7 DC |
1374 | /* |
1375 | * Search the extent records for the entry containing block bno. | |
1376 | * If bno lies in a hole, point to the next entry. If bno lies | |
1377 | * past eof, *eofp will be set, and *prevp will contain the last | |
1378 | * entry (null if none). Else, *lastxp will be set to the index | |
1379 | * of the found entry; *gotp will contain the entry. | |
1380 | */ | |
1381 | STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */ | |
1382 | xfs_bmap_search_multi_extents( | |
1383 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
1384 | xfs_fileoff_t bno, /* block number searched for */ | |
1385 | int *eofp, /* out: end of file found */ | |
1386 | xfs_extnum_t *lastxp, /* out: last extent index */ | |
1387 | xfs_bmbt_irec_t *gotp, /* out: extent entry found */ | |
1388 | xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ | |
1389 | { | |
1390 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
1391 | xfs_extnum_t lastx; /* last extent index */ | |
a5bd606b | 1392 | |
9e5987a7 DC |
1393 | /* |
1394 | * Initialize the extent entry structure to catch access to | |
1395 | * uninitialized br_startblock field. | |
1396 | */ | |
1397 | gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL; | |
1398 | gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL; | |
1399 | gotp->br_state = XFS_EXT_INVALID; | |
9e5987a7 | 1400 | gotp->br_startblock = 0xffffa5a5a5a5a5a5LL; |
9e5987a7 | 1401 | prevp->br_startoff = NULLFILEOFF; |
c6534249 | 1402 | |
9e5987a7 DC |
1403 | ep = xfs_iext_bno_to_ext(ifp, bno, &lastx); |
1404 | if (lastx > 0) { | |
1405 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp); | |
1406 | } | |
1407 | if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) { | |
1408 | xfs_bmbt_get_all(ep, gotp); | |
1409 | *eofp = 0; | |
1410 | } else { | |
1411 | if (lastx > 0) { | |
1412 | *gotp = *prevp; | |
1413 | } | |
1414 | *eofp = 1; | |
1415 | ep = NULL; | |
1416 | } | |
1417 | *lastxp = lastx; | |
1418 | return ep; | |
1da177e4 LT |
1419 | } |
1420 | ||
dd9f438e | 1421 | /* |
9e5987a7 DC |
1422 | * Search the extents list for the inode, for the extent containing bno. |
1423 | * If bno lies in a hole, point to the next entry. If bno lies past eof, | |
1424 | * *eofp will be set, and *prevp will contain the last entry (null if none). | |
1425 | * Else, *lastxp will be set to the index of the found | |
1426 | * entry; *gotp will contain the entry. | |
dd9f438e | 1427 | */ |
9e5987a7 DC |
1428 | STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */ |
1429 | xfs_bmap_search_extents( | |
1430 | xfs_inode_t *ip, /* incore inode pointer */ | |
1431 | xfs_fileoff_t bno, /* block number searched for */ | |
1432 | int fork, /* data or attr fork */ | |
1433 | int *eofp, /* out: end of file found */ | |
1434 | xfs_extnum_t *lastxp, /* out: last extent index */ | |
1435 | xfs_bmbt_irec_t *gotp, /* out: extent entry found */ | |
1436 | xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ | |
dd9f438e | 1437 | { |
9e5987a7 DC |
1438 | xfs_ifork_t *ifp; /* inode fork pointer */ |
1439 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
dd9f438e | 1440 | |
9e5987a7 DC |
1441 | XFS_STATS_INC(xs_look_exlist); |
1442 | ifp = XFS_IFORK_PTR(ip, fork); | |
dd9f438e | 1443 | |
9e5987a7 | 1444 | ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp); |
dd9f438e | 1445 | |
9e5987a7 DC |
1446 | if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) && |
1447 | !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) { | |
1448 | xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO, | |
1449 | "Access to block zero in inode %llu " | |
1450 | "start_block: %llx start_off: %llx " | |
08e96e1a | 1451 | "blkcnt: %llx extent-state: %x lastx: %x", |
9e5987a7 DC |
1452 | (unsigned long long)ip->i_ino, |
1453 | (unsigned long long)gotp->br_startblock, | |
1454 | (unsigned long long)gotp->br_startoff, | |
1455 | (unsigned long long)gotp->br_blockcount, | |
1456 | gotp->br_state, *lastxp); | |
1457 | *lastxp = NULLEXTNUM; | |
1458 | *eofp = 1; | |
1459 | return NULL; | |
dd9f438e | 1460 | } |
9e5987a7 DC |
1461 | return ep; |
1462 | } | |
dd9f438e | 1463 | |
9e5987a7 DC |
1464 | /* |
1465 | * Returns the file-relative block number of the first unused block(s) | |
1466 | * in the file with at least "len" logically contiguous blocks free. | |
1467 | * This is the lowest-address hole if the file has holes, else the first block | |
1468 | * past the end of file. | |
1469 | * Return 0 if the file is currently local (in-inode). | |
1470 | */ | |
1471 | int /* error */ | |
1472 | xfs_bmap_first_unused( | |
1473 | xfs_trans_t *tp, /* transaction pointer */ | |
1474 | xfs_inode_t *ip, /* incore inode */ | |
1475 | xfs_extlen_t len, /* size of hole to find */ | |
1476 | xfs_fileoff_t *first_unused, /* unused block */ | |
1477 | int whichfork) /* data or attr fork */ | |
1478 | { | |
1479 | int error; /* error return value */ | |
1480 | int idx; /* extent record index */ | |
1481 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1482 | xfs_fileoff_t lastaddr; /* last block number seen */ | |
1483 | xfs_fileoff_t lowest; /* lowest useful block */ | |
1484 | xfs_fileoff_t max; /* starting useful block */ | |
1485 | xfs_fileoff_t off; /* offset for this block */ | |
1486 | xfs_extnum_t nextents; /* number of extent entries */ | |
1487 | ||
1488 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE || | |
1489 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS || | |
1490 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
1491 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { | |
1492 | *first_unused = 0; | |
1493 | return 0; | |
dd9f438e | 1494 | } |
9e5987a7 DC |
1495 | ifp = XFS_IFORK_PTR(ip, whichfork); |
1496 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
1497 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
1498 | return error; | |
1499 | lowest = *first_unused; | |
1500 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
1501 | for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) { | |
1502 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); | |
1503 | off = xfs_bmbt_get_startoff(ep); | |
1504 | /* | |
1505 | * See if the hole before this extent will work. | |
1506 | */ | |
1507 | if (off >= lowest + len && off - max >= len) { | |
1508 | *first_unused = max; | |
1509 | return 0; | |
1510 | } | |
1511 | lastaddr = off + xfs_bmbt_get_blockcount(ep); | |
1512 | max = XFS_FILEOFF_MAX(lastaddr, lowest); | |
dd9f438e | 1513 | } |
9e5987a7 DC |
1514 | *first_unused = max; |
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | /* | |
02bb4873 | 1519 | * Returns the file-relative block number of the last block - 1 before |
9e5987a7 DC |
1520 | * last_block (input value) in the file. |
1521 | * This is not based on i_size, it is based on the extent records. | |
1522 | * Returns 0 for local files, as they do not have extent records. | |
1523 | */ | |
1524 | int /* error */ | |
1525 | xfs_bmap_last_before( | |
1526 | xfs_trans_t *tp, /* transaction pointer */ | |
1527 | xfs_inode_t *ip, /* incore inode */ | |
1528 | xfs_fileoff_t *last_block, /* last block */ | |
1529 | int whichfork) /* data or attr fork */ | |
1530 | { | |
1531 | xfs_fileoff_t bno; /* input file offset */ | |
1532 | int eof; /* hit end of file */ | |
1533 | xfs_bmbt_rec_host_t *ep; /* pointer to last extent */ | |
1534 | int error; /* error return value */ | |
1535 | xfs_bmbt_irec_t got; /* current extent value */ | |
1536 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1537 | xfs_extnum_t lastx; /* last extent used */ | |
1538 | xfs_bmbt_irec_t prev; /* previous extent value */ | |
1539 | ||
1540 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && | |
1541 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
1542 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL) | |
2451337d | 1543 | return -EIO; |
9e5987a7 DC |
1544 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { |
1545 | *last_block = 0; | |
1546 | return 0; | |
1547 | } | |
1548 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1549 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
1550 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
1551 | return error; | |
1552 | bno = *last_block - 1; | |
1553 | ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
1554 | &prev); | |
1555 | if (eof || xfs_bmbt_get_startoff(ep) > bno) { | |
1556 | if (prev.br_startoff == NULLFILEOFF) | |
1557 | *last_block = 0; | |
dd9f438e | 1558 | else |
9e5987a7 | 1559 | *last_block = prev.br_startoff + prev.br_blockcount; |
dd9f438e | 1560 | } |
dd9f438e | 1561 | /* |
9e5987a7 | 1562 | * Otherwise *last_block is already the right answer. |
dd9f438e | 1563 | */ |
9e5987a7 DC |
1564 | return 0; |
1565 | } | |
1566 | ||
68988114 | 1567 | int |
9e5987a7 DC |
1568 | xfs_bmap_last_extent( |
1569 | struct xfs_trans *tp, | |
1570 | struct xfs_inode *ip, | |
1571 | int whichfork, | |
1572 | struct xfs_bmbt_irec *rec, | |
1573 | int *is_empty) | |
1574 | { | |
1575 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork); | |
1576 | int error; | |
1577 | int nextents; | |
1578 | ||
1579 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
1580 | error = xfs_iread_extents(tp, ip, whichfork); | |
1581 | if (error) | |
1582 | return error; | |
dd9f438e NS |
1583 | } |
1584 | ||
9e5987a7 DC |
1585 | nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); |
1586 | if (nextents == 0) { | |
1587 | *is_empty = 1; | |
1588 | return 0; | |
1589 | } | |
dd9f438e | 1590 | |
9e5987a7 DC |
1591 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, nextents - 1), rec); |
1592 | *is_empty = 0; | |
dd9f438e NS |
1593 | return 0; |
1594 | } | |
1595 | ||
9e5987a7 DC |
1596 | /* |
1597 | * Check the last inode extent to determine whether this allocation will result | |
1598 | * in blocks being allocated at the end of the file. When we allocate new data | |
1599 | * blocks at the end of the file which do not start at the previous data block, | |
1600 | * we will try to align the new blocks at stripe unit boundaries. | |
1601 | * | |
6e708bcf | 1602 | * Returns 1 in bma->aeof if the file (fork) is empty as any new write will be |
9e5987a7 DC |
1603 | * at, or past the EOF. |
1604 | */ | |
1605 | STATIC int | |
1606 | xfs_bmap_isaeof( | |
1607 | struct xfs_bmalloca *bma, | |
1608 | int whichfork) | |
1da177e4 | 1609 | { |
9e5987a7 DC |
1610 | struct xfs_bmbt_irec rec; |
1611 | int is_empty; | |
1612 | int error; | |
1da177e4 | 1613 | |
9e5987a7 DC |
1614 | bma->aeof = 0; |
1615 | error = xfs_bmap_last_extent(NULL, bma->ip, whichfork, &rec, | |
1616 | &is_empty); | |
6e708bcf | 1617 | if (error) |
9e5987a7 | 1618 | return error; |
1da177e4 | 1619 | |
6e708bcf DC |
1620 | if (is_empty) { |
1621 | bma->aeof = 1; | |
1622 | return 0; | |
1623 | } | |
1624 | ||
1da177e4 | 1625 | /* |
9e5987a7 DC |
1626 | * Check if we are allocation or past the last extent, or at least into |
1627 | * the last delayed allocated extent. | |
1da177e4 | 1628 | */ |
9e5987a7 DC |
1629 | bma->aeof = bma->offset >= rec.br_startoff + rec.br_blockcount || |
1630 | (bma->offset >= rec.br_startoff && | |
1631 | isnullstartblock(rec.br_startblock)); | |
1632 | return 0; | |
1633 | } | |
1da177e4 | 1634 | |
9e5987a7 DC |
1635 | /* |
1636 | * Returns the file-relative block number of the first block past eof in | |
1637 | * the file. This is not based on i_size, it is based on the extent records. | |
1638 | * Returns 0 for local files, as they do not have extent records. | |
1639 | */ | |
1640 | int | |
1641 | xfs_bmap_last_offset( | |
9e5987a7 DC |
1642 | struct xfs_inode *ip, |
1643 | xfs_fileoff_t *last_block, | |
1644 | int whichfork) | |
1645 | { | |
1646 | struct xfs_bmbt_irec rec; | |
1647 | int is_empty; | |
1648 | int error; | |
04e99455 | 1649 | |
9e5987a7 | 1650 | *last_block = 0; |
0892ccd6 | 1651 | |
9e5987a7 DC |
1652 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) |
1653 | return 0; | |
a365bdd5 | 1654 | |
9e5987a7 DC |
1655 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && |
1656 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
2451337d | 1657 | return -EIO; |
a365bdd5 | 1658 | |
9e5987a7 DC |
1659 | error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, &is_empty); |
1660 | if (error || is_empty) | |
a365bdd5 | 1661 | return error; |
9e5987a7 DC |
1662 | |
1663 | *last_block = rec.br_startoff + rec.br_blockcount; | |
a365bdd5 NS |
1664 | return 0; |
1665 | } | |
1666 | ||
9e5987a7 DC |
1667 | /* |
1668 | * Returns whether the selected fork of the inode has exactly one | |
1669 | * block or not. For the data fork we check this matches di_size, | |
1670 | * implying the file's range is 0..bsize-1. | |
1671 | */ | |
1672 | int /* 1=>1 block, 0=>otherwise */ | |
1673 | xfs_bmap_one_block( | |
1674 | xfs_inode_t *ip, /* incore inode */ | |
1675 | int whichfork) /* data or attr fork */ | |
c467c049 | 1676 | { |
9e5987a7 DC |
1677 | xfs_bmbt_rec_host_t *ep; /* ptr to fork's extent */ |
1678 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1679 | int rval; /* return value */ | |
1680 | xfs_bmbt_irec_t s; /* internal version of extent */ | |
c467c049 | 1681 | |
9e5987a7 DC |
1682 | #ifndef DEBUG |
1683 | if (whichfork == XFS_DATA_FORK) | |
1684 | return XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize; | |
1685 | #endif /* !DEBUG */ | |
1686 | if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1) | |
1687 | return 0; | |
1688 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
1689 | return 0; | |
1690 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1691 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
1692 | ep = xfs_iext_get_ext(ifp, 0); | |
1693 | xfs_bmbt_get_all(ep, &s); | |
1694 | rval = s.br_startoff == 0 && s.br_blockcount == 1; | |
1695 | if (rval && whichfork == XFS_DATA_FORK) | |
1696 | ASSERT(XFS_ISIZE(ip) == ip->i_mount->m_sb.sb_blocksize); | |
1697 | return rval; | |
1698 | } | |
c467c049 | 1699 | |
9e5987a7 DC |
1700 | /* |
1701 | * Extent tree manipulation functions used during allocation. | |
1702 | */ | |
c467c049 | 1703 | |
9e5987a7 DC |
1704 | /* |
1705 | * Convert a delayed allocation to a real allocation. | |
1706 | */ | |
1707 | STATIC int /* error */ | |
1708 | xfs_bmap_add_extent_delay_real( | |
1709 | struct xfs_bmalloca *bma) | |
1710 | { | |
1711 | struct xfs_bmbt_irec *new = &bma->got; | |
1712 | int diff; /* temp value */ | |
1713 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ | |
1714 | int error; /* error return value */ | |
1715 | int i; /* temp state */ | |
1716 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1717 | xfs_fileoff_t new_endoff; /* end offset of new entry */ | |
1718 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
1719 | /* left is 0, right is 1, prev is 2 */ | |
1720 | int rval=0; /* return value (logging flags) */ | |
1721 | int state = 0;/* state bits, accessed thru macros */ | |
1722 | xfs_filblks_t da_new; /* new count del alloc blocks used */ | |
1723 | xfs_filblks_t da_old; /* old count del alloc blocks used */ | |
1724 | xfs_filblks_t temp=0; /* value for da_new calculations */ | |
1725 | xfs_filblks_t temp2=0;/* value for da_new calculations */ | |
1726 | int tmp_rval; /* partial logging flags */ | |
c29aad41 | 1727 | struct xfs_mount *mp; |
c467c049 | 1728 | |
c29aad41 | 1729 | mp = bma->tp ? bma->tp->t_mountp : NULL; |
9e5987a7 | 1730 | ifp = XFS_IFORK_PTR(bma->ip, XFS_DATA_FORK); |
c467c049 | 1731 | |
9e5987a7 DC |
1732 | ASSERT(bma->idx >= 0); |
1733 | ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); | |
1734 | ASSERT(!isnullstartblock(new->br_startblock)); | |
1735 | ASSERT(!bma->cur || | |
1736 | (bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); | |
c467c049 | 1737 | |
9e5987a7 | 1738 | XFS_STATS_INC(xs_add_exlist); |
c467c049 | 1739 | |
9e5987a7 DC |
1740 | #define LEFT r[0] |
1741 | #define RIGHT r[1] | |
1742 | #define PREV r[2] | |
c467c049 CH |
1743 | |
1744 | /* | |
9e5987a7 | 1745 | * Set up a bunch of variables to make the tests simpler. |
c467c049 | 1746 | */ |
9e5987a7 DC |
1747 | ep = xfs_iext_get_ext(ifp, bma->idx); |
1748 | xfs_bmbt_get_all(ep, &PREV); | |
1749 | new_endoff = new->br_startoff + new->br_blockcount; | |
1750 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
1751 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
1752 | ||
1753 | da_old = startblockval(PREV.br_startblock); | |
1754 | da_new = 0; | |
1755 | ||
c467c049 | 1756 | /* |
9e5987a7 DC |
1757 | * Set flags determining what part of the previous delayed allocation |
1758 | * extent is being replaced by a real allocation. | |
c467c049 | 1759 | */ |
9e5987a7 DC |
1760 | if (PREV.br_startoff == new->br_startoff) |
1761 | state |= BMAP_LEFT_FILLING; | |
1762 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
1763 | state |= BMAP_RIGHT_FILLING; | |
c467c049 CH |
1764 | |
1765 | /* | |
9e5987a7 DC |
1766 | * Check and set flags if this segment has a left neighbor. |
1767 | * Don't set contiguous if the combined extent would be too large. | |
c467c049 | 1768 | */ |
9e5987a7 DC |
1769 | if (bma->idx > 0) { |
1770 | state |= BMAP_LEFT_VALID; | |
1771 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &LEFT); | |
a99ebf43 | 1772 | |
9e5987a7 DC |
1773 | if (isnullstartblock(LEFT.br_startblock)) |
1774 | state |= BMAP_LEFT_DELAY; | |
a365bdd5 | 1775 | } |
a365bdd5 | 1776 | |
9e5987a7 DC |
1777 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && |
1778 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
1779 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
1780 | LEFT.br_state == new->br_state && | |
1781 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
1782 | state |= BMAP_LEFT_CONTIG; | |
a365bdd5 | 1783 | |
1da177e4 | 1784 | /* |
9e5987a7 DC |
1785 | * Check and set flags if this segment has a right neighbor. |
1786 | * Don't set contiguous if the combined extent would be too large. | |
1787 | * Also check for all-three-contiguous being too large. | |
1da177e4 | 1788 | */ |
9e5987a7 DC |
1789 | if (bma->idx < bma->ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) { |
1790 | state |= BMAP_RIGHT_VALID; | |
1791 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx + 1), &RIGHT); | |
14b064ce | 1792 | |
9e5987a7 DC |
1793 | if (isnullstartblock(RIGHT.br_startblock)) |
1794 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 1795 | } |
9e5987a7 DC |
1796 | |
1797 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && | |
1798 | new_endoff == RIGHT.br_startoff && | |
1799 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
1800 | new->br_state == RIGHT.br_state && | |
1801 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
1802 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1803 | BMAP_RIGHT_FILLING)) != | |
1804 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1805 | BMAP_RIGHT_FILLING) || | |
1806 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
1807 | <= MAXEXTLEN)) | |
1808 | state |= BMAP_RIGHT_CONTIG; | |
1809 | ||
1810 | error = 0; | |
1da177e4 | 1811 | /* |
9e5987a7 | 1812 | * Switch out based on the FILLING and CONTIG state bits. |
1da177e4 | 1813 | */ |
9e5987a7 DC |
1814 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
1815 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
1816 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
1817 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
1da177e4 | 1818 | /* |
9e5987a7 DC |
1819 | * Filling in all of a previously delayed allocation extent. |
1820 | * The left and right neighbors are both contiguous with new. | |
1da177e4 | 1821 | */ |
9e5987a7 DC |
1822 | bma->idx--; |
1823 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1824 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
1825 | LEFT.br_blockcount + PREV.br_blockcount + | |
1826 | RIGHT.br_blockcount); | |
1827 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1828 | ||
1829 | xfs_iext_remove(bma->ip, bma->idx + 1, 2, state); | |
1830 | bma->ip->i_d.di_nextents--; | |
1831 | if (bma->cur == NULL) | |
1832 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1833 | else { | |
1834 | rval = XFS_ILOG_CORE; | |
1835 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
1836 | RIGHT.br_startblock, | |
1837 | RIGHT.br_blockcount, &i); | |
1838 | if (error) | |
1839 | goto done; | |
c29aad41 | 1840 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1841 | error = xfs_btree_delete(bma->cur, &i); |
1842 | if (error) | |
1843 | goto done; | |
c29aad41 | 1844 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1845 | error = xfs_btree_decrement(bma->cur, 0, &i); |
1846 | if (error) | |
1847 | goto done; | |
c29aad41 | 1848 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1849 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, |
1850 | LEFT.br_startblock, | |
1851 | LEFT.br_blockcount + | |
1852 | PREV.br_blockcount + | |
1853 | RIGHT.br_blockcount, LEFT.br_state); | |
1854 | if (error) | |
1855 | goto done; | |
1856 | } | |
1857 | break; | |
1858 | ||
1859 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
a365bdd5 | 1860 | /* |
9e5987a7 DC |
1861 | * Filling in all of a previously delayed allocation extent. |
1862 | * The left neighbor is contiguous, the right is not. | |
a365bdd5 | 1863 | */ |
9e5987a7 DC |
1864 | bma->idx--; |
1865 | ||
1866 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1867 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
1868 | LEFT.br_blockcount + PREV.br_blockcount); | |
1869 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1870 | ||
1871 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); | |
1872 | if (bma->cur == NULL) | |
1873 | rval = XFS_ILOG_DEXT; | |
1874 | else { | |
1875 | rval = 0; | |
1876 | error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, | |
1877 | LEFT.br_startblock, LEFT.br_blockcount, | |
1878 | &i); | |
1879 | if (error) | |
1880 | goto done; | |
c29aad41 | 1881 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1882 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, |
1883 | LEFT.br_startblock, | |
1884 | LEFT.br_blockcount + | |
1885 | PREV.br_blockcount, LEFT.br_state); | |
1886 | if (error) | |
1887 | goto done; | |
1888 | } | |
1889 | break; | |
1890 | ||
1891 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
0937e0fd | 1892 | /* |
9e5987a7 DC |
1893 | * Filling in all of a previously delayed allocation extent. |
1894 | * The right neighbor is contiguous, the left is not. | |
0937e0fd | 1895 | */ |
9e5987a7 DC |
1896 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1897 | xfs_bmbt_set_startblock(ep, new->br_startblock); | |
1898 | xfs_bmbt_set_blockcount(ep, | |
1899 | PREV.br_blockcount + RIGHT.br_blockcount); | |
1900 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
0937e0fd | 1901 | |
9e5987a7 DC |
1902 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); |
1903 | if (bma->cur == NULL) | |
1904 | rval = XFS_ILOG_DEXT; | |
1905 | else { | |
1906 | rval = 0; | |
1907 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
1908 | RIGHT.br_startblock, | |
1909 | RIGHT.br_blockcount, &i); | |
1910 | if (error) | |
1911 | goto done; | |
c29aad41 | 1912 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1913 | error = xfs_bmbt_update(bma->cur, PREV.br_startoff, |
1914 | new->br_startblock, | |
1915 | PREV.br_blockcount + | |
1916 | RIGHT.br_blockcount, PREV.br_state); | |
1917 | if (error) | |
1918 | goto done; | |
1919 | } | |
1920 | break; | |
1921 | ||
1922 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: | |
a365bdd5 | 1923 | /* |
9e5987a7 DC |
1924 | * Filling in all of a previously delayed allocation extent. |
1925 | * Neither the left nor right neighbors are contiguous with | |
1926 | * the new one. | |
a365bdd5 | 1927 | */ |
9e5987a7 DC |
1928 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1929 | xfs_bmbt_set_startblock(ep, new->br_startblock); | |
1930 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
a365bdd5 | 1931 | |
9e5987a7 DC |
1932 | bma->ip->i_d.di_nextents++; |
1933 | if (bma->cur == NULL) | |
1934 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1935 | else { | |
1936 | rval = XFS_ILOG_CORE; | |
1937 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
1938 | new->br_startblock, new->br_blockcount, | |
1939 | &i); | |
1940 | if (error) | |
1941 | goto done; | |
c29aad41 | 1942 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
1943 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
1944 | error = xfs_btree_insert(bma->cur, &i); | |
1945 | if (error) | |
1946 | goto done; | |
c29aad41 | 1947 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1948 | } |
1949 | break; | |
1da177e4 | 1950 | |
9e5987a7 | 1951 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
1da177e4 | 1952 | /* |
9e5987a7 DC |
1953 | * Filling in the first part of a previous delayed allocation. |
1954 | * The left neighbor is contiguous. | |
1da177e4 | 1955 | */ |
9e5987a7 DC |
1956 | trace_xfs_bmap_pre_update(bma->ip, bma->idx - 1, state, _THIS_IP_); |
1957 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx - 1), | |
1958 | LEFT.br_blockcount + new->br_blockcount); | |
1959 | xfs_bmbt_set_startoff(ep, | |
1960 | PREV.br_startoff + new->br_blockcount); | |
1961 | trace_xfs_bmap_post_update(bma->ip, bma->idx - 1, state, _THIS_IP_); | |
1da177e4 | 1962 | |
9e5987a7 DC |
1963 | temp = PREV.br_blockcount - new->br_blockcount; |
1964 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1965 | xfs_bmbt_set_blockcount(ep, temp); | |
1966 | if (bma->cur == NULL) | |
1967 | rval = XFS_ILOG_DEXT; | |
1968 | else { | |
1969 | rval = 0; | |
1970 | error = xfs_bmbt_lookup_eq(bma->cur, LEFT.br_startoff, | |
1971 | LEFT.br_startblock, LEFT.br_blockcount, | |
1972 | &i); | |
1973 | if (error) | |
1974 | goto done; | |
c29aad41 | 1975 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
1976 | error = xfs_bmbt_update(bma->cur, LEFT.br_startoff, |
1977 | LEFT.br_startblock, | |
1978 | LEFT.br_blockcount + | |
1979 | new->br_blockcount, | |
1980 | LEFT.br_state); | |
f3ca8738 | 1981 | if (error) |
1da177e4 | 1982 | goto done; |
1da177e4 | 1983 | } |
9e5987a7 DC |
1984 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
1985 | startblockval(PREV.br_startblock)); | |
1986 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
1987 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1988 | ||
1989 | bma->idx--; | |
1990 | break; | |
1991 | ||
1992 | case BMAP_LEFT_FILLING: | |
1da177e4 | 1993 | /* |
9e5987a7 DC |
1994 | * Filling in the first part of a previous delayed allocation. |
1995 | * The left neighbor is not contiguous. | |
1da177e4 | 1996 | */ |
9e5987a7 DC |
1997 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); |
1998 | xfs_bmbt_set_startoff(ep, new_endoff); | |
1999 | temp = PREV.br_blockcount - new->br_blockcount; | |
2000 | xfs_bmbt_set_blockcount(ep, temp); | |
2001 | xfs_iext_insert(bma->ip, bma->idx, 1, new, state); | |
2002 | bma->ip->i_d.di_nextents++; | |
2003 | if (bma->cur == NULL) | |
2004 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1da177e4 | 2005 | else { |
9e5987a7 DC |
2006 | rval = XFS_ILOG_CORE; |
2007 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2008 | new->br_startblock, new->br_blockcount, | |
2009 | &i); | |
2010 | if (error) | |
2011 | goto done; | |
c29aad41 | 2012 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2013 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2014 | error = xfs_btree_insert(bma->cur, &i); | |
2015 | if (error) | |
1da177e4 | 2016 | goto done; |
c29aad41 | 2017 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 2018 | } |
233eebb9 | 2019 | |
9e5987a7 DC |
2020 | if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) { |
2021 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2022 | bma->firstblock, bma->flist, | |
2023 | &bma->cur, 1, &tmp_rval, XFS_DATA_FORK); | |
2024 | rval |= tmp_rval; | |
2025 | if (error) | |
2026 | goto done; | |
1da177e4 | 2027 | } |
9e5987a7 DC |
2028 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
2029 | startblockval(PREV.br_startblock) - | |
2030 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2031 | ep = xfs_iext_get_ext(ifp, bma->idx + 1); | |
2032 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2033 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
1da177e4 LT |
2034 | break; |
2035 | ||
9e5987a7 | 2036 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 | 2037 | /* |
9e5987a7 DC |
2038 | * Filling in the last part of a previous delayed allocation. |
2039 | * The right neighbor is contiguous with the new allocation. | |
1da177e4 | 2040 | */ |
9e5987a7 DC |
2041 | temp = PREV.br_blockcount - new->br_blockcount; |
2042 | trace_xfs_bmap_pre_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
1da177e4 | 2043 | xfs_bmbt_set_blockcount(ep, temp); |
9e5987a7 DC |
2044 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx + 1), |
2045 | new->br_startoff, new->br_startblock, | |
2046 | new->br_blockcount + RIGHT.br_blockcount, | |
2047 | RIGHT.br_state); | |
2048 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 1, state, _THIS_IP_); | |
2049 | if (bma->cur == NULL) | |
2050 | rval = XFS_ILOG_DEXT; | |
2051 | else { | |
2052 | rval = 0; | |
2053 | error = xfs_bmbt_lookup_eq(bma->cur, RIGHT.br_startoff, | |
2054 | RIGHT.br_startblock, | |
2055 | RIGHT.br_blockcount, &i); | |
2056 | if (error) | |
2057 | goto done; | |
c29aad41 | 2058 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2059 | error = xfs_bmbt_update(bma->cur, new->br_startoff, |
2060 | new->br_startblock, | |
2061 | new->br_blockcount + | |
2062 | RIGHT.br_blockcount, | |
2063 | RIGHT.br_state); | |
2064 | if (error) | |
2065 | goto done; | |
1da177e4 | 2066 | } |
9e5987a7 DC |
2067 | |
2068 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), | |
2069 | startblockval(PREV.br_startblock)); | |
2070 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2071 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2072 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2073 | ||
2074 | bma->idx++; | |
1da177e4 LT |
2075 | break; |
2076 | ||
9e5987a7 | 2077 | case BMAP_RIGHT_FILLING: |
1da177e4 | 2078 | /* |
9e5987a7 DC |
2079 | * Filling in the last part of a previous delayed allocation. |
2080 | * The right neighbor is not contiguous. | |
1da177e4 | 2081 | */ |
9e5987a7 DC |
2082 | temp = PREV.br_blockcount - new->br_blockcount; |
2083 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1da177e4 | 2084 | xfs_bmbt_set_blockcount(ep, temp); |
9e5987a7 DC |
2085 | xfs_iext_insert(bma->ip, bma->idx + 1, 1, new, state); |
2086 | bma->ip->i_d.di_nextents++; | |
2087 | if (bma->cur == NULL) | |
2088 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2089 | else { | |
2090 | rval = XFS_ILOG_CORE; | |
2091 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2092 | new->br_startblock, new->br_blockcount, | |
2093 | &i); | |
2094 | if (error) | |
2095 | goto done; | |
c29aad41 | 2096 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2097 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2098 | error = xfs_btree_insert(bma->cur, &i); | |
2099 | if (error) | |
2100 | goto done; | |
c29aad41 | 2101 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 2102 | } |
9e5987a7 DC |
2103 | |
2104 | if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) { | |
2105 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2106 | bma->firstblock, bma->flist, &bma->cur, 1, | |
2107 | &tmp_rval, XFS_DATA_FORK); | |
2108 | rval |= tmp_rval; | |
2109 | if (error) | |
2110 | goto done; | |
1da177e4 | 2111 | } |
9e5987a7 DC |
2112 | da_new = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(bma->ip, temp), |
2113 | startblockval(PREV.br_startblock) - | |
2114 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2115 | ep = xfs_iext_get_ext(ifp, bma->idx); | |
2116 | xfs_bmbt_set_startblock(ep, nullstartblock(da_new)); | |
2117 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2118 | ||
2119 | bma->idx++; | |
1da177e4 LT |
2120 | break; |
2121 | ||
2122 | case 0: | |
2123 | /* | |
9e5987a7 DC |
2124 | * Filling in the middle part of a previous delayed allocation. |
2125 | * Contiguity is impossible here. | |
2126 | * This case is avoided almost all the time. | |
2127 | * | |
2128 | * We start with a delayed allocation: | |
2129 | * | |
2130 | * +ddddddddddddddddddddddddddddddddddddddddddddddddddddddd+ | |
2131 | * PREV @ idx | |
2132 | * | |
2133 | * and we are allocating: | |
2134 | * +rrrrrrrrrrrrrrrrr+ | |
2135 | * new | |
2136 | * | |
2137 | * and we set it up for insertion as: | |
2138 | * +ddddddddddddddddddd+rrrrrrrrrrrrrrrrr+ddddddddddddddddd+ | |
2139 | * new | |
2140 | * PREV @ idx LEFT RIGHT | |
2141 | * inserted at idx + 1 | |
1da177e4 | 2142 | */ |
9e5987a7 DC |
2143 | temp = new->br_startoff - PREV.br_startoff; |
2144 | temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
2145 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, 0, _THIS_IP_); | |
2146 | xfs_bmbt_set_blockcount(ep, temp); /* truncate PREV */ | |
2147 | LEFT = *new; | |
2148 | RIGHT.br_state = PREV.br_state; | |
2149 | RIGHT.br_startblock = nullstartblock( | |
2150 | (int)xfs_bmap_worst_indlen(bma->ip, temp2)); | |
2151 | RIGHT.br_startoff = new_endoff; | |
2152 | RIGHT.br_blockcount = temp2; | |
2153 | /* insert LEFT (r[0]) and RIGHT (r[1]) at the same time */ | |
2154 | xfs_iext_insert(bma->ip, bma->idx + 1, 2, &LEFT, state); | |
2155 | bma->ip->i_d.di_nextents++; | |
2156 | if (bma->cur == NULL) | |
2157 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2158 | else { | |
2159 | rval = XFS_ILOG_CORE; | |
2160 | error = xfs_bmbt_lookup_eq(bma->cur, new->br_startoff, | |
2161 | new->br_startblock, new->br_blockcount, | |
2162 | &i); | |
2163 | if (error) | |
2164 | goto done; | |
c29aad41 | 2165 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2166 | bma->cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2167 | error = xfs_btree_insert(bma->cur, &i); | |
2168 | if (error) | |
2169 | goto done; | |
c29aad41 | 2170 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 2171 | } |
1da177e4 | 2172 | |
9e5987a7 DC |
2173 | if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) { |
2174 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2175 | bma->firstblock, bma->flist, &bma->cur, | |
2176 | 1, &tmp_rval, XFS_DATA_FORK); | |
2177 | rval |= tmp_rval; | |
2178 | if (error) | |
2179 | goto done; | |
2180 | } | |
2181 | temp = xfs_bmap_worst_indlen(bma->ip, temp); | |
2182 | temp2 = xfs_bmap_worst_indlen(bma->ip, temp2); | |
2183 | diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) - | |
2184 | (bma->cur ? bma->cur->bc_private.b.allocated : 0)); | |
2185 | if (diff > 0) { | |
0d485ada DC |
2186 | error = xfs_mod_fdblocks(bma->ip->i_mount, |
2187 | -((int64_t)diff), false); | |
9e5987a7 DC |
2188 | ASSERT(!error); |
2189 | if (error) | |
2190 | goto done; | |
2191 | } | |
2192 | ||
2193 | ep = xfs_iext_get_ext(ifp, bma->idx); | |
2194 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
2195 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
2196 | trace_xfs_bmap_pre_update(bma->ip, bma->idx + 2, state, _THIS_IP_); | |
2197 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, bma->idx + 2), | |
2198 | nullstartblock((int)temp2)); | |
2199 | trace_xfs_bmap_post_update(bma->ip, bma->idx + 2, state, _THIS_IP_); | |
2200 | ||
2201 | bma->idx++; | |
2202 | da_new = temp + temp2; | |
2203 | break; | |
2204 | ||
2205 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2206 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2207 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
2208 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
2209 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2210 | case BMAP_LEFT_CONTIG: | |
2211 | case BMAP_RIGHT_CONTIG: | |
2212 | /* | |
2213 | * These cases are all impossible. | |
2214 | */ | |
2215 | ASSERT(0); | |
2216 | } | |
2217 | ||
2218 | /* convert to a btree if necessary */ | |
2219 | if (xfs_bmap_needs_btree(bma->ip, XFS_DATA_FORK)) { | |
2220 | int tmp_logflags; /* partial log flag return val */ | |
2221 | ||
2222 | ASSERT(bma->cur == NULL); | |
2223 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
2224 | bma->firstblock, bma->flist, &bma->cur, | |
2225 | da_old > 0, &tmp_logflags, XFS_DATA_FORK); | |
2226 | bma->logflags |= tmp_logflags; | |
2227 | if (error) | |
2228 | goto done; | |
2229 | } | |
2230 | ||
2231 | /* adjust for changes in reserved delayed indirect blocks */ | |
2232 | if (da_old || da_new) { | |
2233 | temp = da_new; | |
2234 | if (bma->cur) | |
2235 | temp += bma->cur->bc_private.b.allocated; | |
2236 | ASSERT(temp <= da_old); | |
2237 | if (temp < da_old) | |
0d485ada DC |
2238 | xfs_mod_fdblocks(bma->ip->i_mount, |
2239 | (int64_t)(da_old - temp), false); | |
96540c78 | 2240 | } |
9e5987a7 DC |
2241 | |
2242 | /* clear out the allocated field, done with it now in any case. */ | |
2243 | if (bma->cur) | |
2244 | bma->cur->bc_private.b.allocated = 0; | |
2245 | ||
2246 | xfs_bmap_check_leaf_extents(bma->cur, bma->ip, XFS_DATA_FORK); | |
1da177e4 | 2247 | done: |
9e5987a7 | 2248 | bma->logflags |= rval; |
1da177e4 | 2249 | return error; |
9e5987a7 DC |
2250 | #undef LEFT |
2251 | #undef RIGHT | |
2252 | #undef PREV | |
1da177e4 LT |
2253 | } |
2254 | ||
2255 | /* | |
9e5987a7 | 2256 | * Convert an unwritten allocation to a real allocation or vice versa. |
1da177e4 | 2257 | */ |
9e5987a7 DC |
2258 | STATIC int /* error */ |
2259 | xfs_bmap_add_extent_unwritten_real( | |
2260 | struct xfs_trans *tp, | |
2261 | xfs_inode_t *ip, /* incore inode pointer */ | |
2262 | xfs_extnum_t *idx, /* extent number to update/insert */ | |
2263 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
2264 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ | |
2265 | xfs_fsblock_t *first, /* pointer to firstblock variable */ | |
2266 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
2267 | int *logflagsp) /* inode logging flags */ | |
1da177e4 | 2268 | { |
9e5987a7 DC |
2269 | xfs_btree_cur_t *cur; /* btree cursor */ |
2270 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ | |
2271 | int error; /* error return value */ | |
2272 | int i; /* temp state */ | |
2273 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
2274 | xfs_fileoff_t new_endoff; /* end offset of new entry */ | |
2275 | xfs_exntst_t newext; /* new extent state */ | |
2276 | xfs_exntst_t oldext; /* old extent state */ | |
2277 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
2278 | /* left is 0, right is 1, prev is 2 */ | |
2279 | int rval=0; /* return value (logging flags) */ | |
2280 | int state = 0;/* state bits, accessed thru macros */ | |
c29aad41 | 2281 | struct xfs_mount *mp = tp->t_mountp; |
1da177e4 | 2282 | |
9e5987a7 | 2283 | *logflagsp = 0; |
1da177e4 | 2284 | |
9e5987a7 DC |
2285 | cur = *curp; |
2286 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
8096b1eb | 2287 | |
9e5987a7 DC |
2288 | ASSERT(*idx >= 0); |
2289 | ASSERT(*idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); | |
2290 | ASSERT(!isnullstartblock(new->br_startblock)); | |
2291 | ||
2292 | XFS_STATS_INC(xs_add_exlist); | |
2293 | ||
2294 | #define LEFT r[0] | |
2295 | #define RIGHT r[1] | |
2296 | #define PREV r[2] | |
7cc95a82 | 2297 | |
1da177e4 | 2298 | /* |
9e5987a7 | 2299 | * Set up a bunch of variables to make the tests simpler. |
1da177e4 | 2300 | */ |
9e5987a7 DC |
2301 | error = 0; |
2302 | ep = xfs_iext_get_ext(ifp, *idx); | |
2303 | xfs_bmbt_get_all(ep, &PREV); | |
2304 | newext = new->br_state; | |
2305 | oldext = (newext == XFS_EXT_UNWRITTEN) ? | |
2306 | XFS_EXT_NORM : XFS_EXT_UNWRITTEN; | |
2307 | ASSERT(PREV.br_state == oldext); | |
2308 | new_endoff = new->br_startoff + new->br_blockcount; | |
2309 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
2310 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
7cc95a82 | 2311 | |
1da177e4 | 2312 | /* |
9e5987a7 DC |
2313 | * Set flags determining what part of the previous oldext allocation |
2314 | * extent is being replaced by a newext allocation. | |
1da177e4 | 2315 | */ |
9e5987a7 DC |
2316 | if (PREV.br_startoff == new->br_startoff) |
2317 | state |= BMAP_LEFT_FILLING; | |
2318 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
2319 | state |= BMAP_RIGHT_FILLING; | |
2320 | ||
1da177e4 | 2321 | /* |
9e5987a7 DC |
2322 | * Check and set flags if this segment has a left neighbor. |
2323 | * Don't set contiguous if the combined extent would be too large. | |
1da177e4 | 2324 | */ |
9e5987a7 DC |
2325 | if (*idx > 0) { |
2326 | state |= BMAP_LEFT_VALID; | |
2327 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &LEFT); | |
2328 | ||
2329 | if (isnullstartblock(LEFT.br_startblock)) | |
2330 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 2331 | } |
9e5987a7 DC |
2332 | |
2333 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
2334 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
2335 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
2336 | LEFT.br_state == newext && | |
2337 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2338 | state |= BMAP_LEFT_CONTIG; | |
2339 | ||
1da177e4 | 2340 | /* |
9e5987a7 DC |
2341 | * Check and set flags if this segment has a right neighbor. |
2342 | * Don't set contiguous if the combined extent would be too large. | |
2343 | * Also check for all-three-contiguous being too large. | |
1da177e4 | 2344 | */ |
9e5987a7 DC |
2345 | if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) { |
2346 | state |= BMAP_RIGHT_VALID; | |
2347 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx + 1), &RIGHT); | |
2348 | if (isnullstartblock(RIGHT.br_startblock)) | |
2349 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 2350 | } |
7cc95a82 | 2351 | |
9e5987a7 DC |
2352 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && |
2353 | new_endoff == RIGHT.br_startoff && | |
2354 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
2355 | newext == RIGHT.br_state && | |
2356 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
2357 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
2358 | BMAP_RIGHT_FILLING)) != | |
2359 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
2360 | BMAP_RIGHT_FILLING) || | |
2361 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
2362 | <= MAXEXTLEN)) | |
2363 | state |= BMAP_RIGHT_CONTIG; | |
136341b4 | 2364 | |
1da177e4 | 2365 | /* |
9e5987a7 | 2366 | * Switch out based on the FILLING and CONTIG state bits. |
1da177e4 | 2367 | */ |
9e5987a7 DC |
2368 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
2369 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
2370 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
2371 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
2372 | /* | |
2373 | * Setting all of a previous oldext extent to newext. | |
2374 | * The left and right neighbors are both contiguous with new. | |
2375 | */ | |
2376 | --*idx; | |
1a5902c5 | 2377 | |
9e5987a7 DC |
2378 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2379 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), | |
2380 | LEFT.br_blockcount + PREV.br_blockcount + | |
2381 | RIGHT.br_blockcount); | |
2382 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1a5902c5 | 2383 | |
9e5987a7 DC |
2384 | xfs_iext_remove(ip, *idx + 1, 2, state); |
2385 | ip->i_d.di_nextents -= 2; | |
2386 | if (cur == NULL) | |
2387 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2388 | else { | |
2389 | rval = XFS_ILOG_CORE; | |
2390 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
2391 | RIGHT.br_startblock, | |
2392 | RIGHT.br_blockcount, &i))) | |
2393 | goto done; | |
c29aad41 | 2394 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2395 | if ((error = xfs_btree_delete(cur, &i))) |
2396 | goto done; | |
c29aad41 | 2397 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2398 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2399 | goto done; | |
c29aad41 | 2400 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2401 | if ((error = xfs_btree_delete(cur, &i))) |
2402 | goto done; | |
c29aad41 | 2403 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2404 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2405 | goto done; | |
c29aad41 | 2406 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2407 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
2408 | LEFT.br_startblock, | |
2409 | LEFT.br_blockcount + PREV.br_blockcount + | |
2410 | RIGHT.br_blockcount, LEFT.br_state))) | |
2411 | goto done; | |
2412 | } | |
2413 | break; | |
1a5902c5 | 2414 | |
9e5987a7 DC |
2415 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: |
2416 | /* | |
2417 | * Setting all of a previous oldext extent to newext. | |
2418 | * The left neighbor is contiguous, the right is not. | |
2419 | */ | |
2420 | --*idx; | |
d8cc890d | 2421 | |
9e5987a7 DC |
2422 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2423 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), | |
2424 | LEFT.br_blockcount + PREV.br_blockcount); | |
2425 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2426 | |
9e5987a7 DC |
2427 | xfs_iext_remove(ip, *idx + 1, 1, state); |
2428 | ip->i_d.di_nextents--; | |
2429 | if (cur == NULL) | |
2430 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2431 | else { | |
2432 | rval = XFS_ILOG_CORE; | |
2433 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2434 | PREV.br_startblock, PREV.br_blockcount, | |
2435 | &i))) | |
2436 | goto done; | |
c29aad41 | 2437 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2438 | if ((error = xfs_btree_delete(cur, &i))) |
2439 | goto done; | |
c29aad41 | 2440 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2441 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2442 | goto done; | |
c29aad41 | 2443 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2444 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
2445 | LEFT.br_startblock, | |
2446 | LEFT.br_blockcount + PREV.br_blockcount, | |
2447 | LEFT.br_state))) | |
2448 | goto done; | |
2449 | } | |
2450 | break; | |
1da177e4 | 2451 | |
9e5987a7 | 2452 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 | 2453 | /* |
9e5987a7 DC |
2454 | * Setting all of a previous oldext extent to newext. |
2455 | * The right neighbor is contiguous, the left is not. | |
1da177e4 | 2456 | */ |
9e5987a7 DC |
2457 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2458 | xfs_bmbt_set_blockcount(ep, | |
2459 | PREV.br_blockcount + RIGHT.br_blockcount); | |
2460 | xfs_bmbt_set_state(ep, newext); | |
2461 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2462 | xfs_iext_remove(ip, *idx + 1, 1, state); | |
2463 | ip->i_d.di_nextents--; | |
2464 | if (cur == NULL) | |
2465 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2466 | else { | |
2467 | rval = XFS_ILOG_CORE; | |
2468 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
2469 | RIGHT.br_startblock, | |
2470 | RIGHT.br_blockcount, &i))) | |
2471 | goto done; | |
c29aad41 | 2472 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2473 | if ((error = xfs_btree_delete(cur, &i))) |
2474 | goto done; | |
c29aad41 | 2475 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2476 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
2477 | goto done; | |
c29aad41 | 2478 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2479 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
2480 | new->br_startblock, | |
2481 | new->br_blockcount + RIGHT.br_blockcount, | |
2482 | newext))) | |
2483 | goto done; | |
1da177e4 | 2484 | } |
9e5987a7 | 2485 | break; |
1e82379b | 2486 | |
9e5987a7 DC |
2487 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: |
2488 | /* | |
2489 | * Setting all of a previous oldext extent to newext. | |
2490 | * Neither the left nor right neighbors are contiguous with | |
2491 | * the new one. | |
2492 | */ | |
2493 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2494 | xfs_bmbt_set_state(ep, newext); | |
2495 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1e82379b | 2496 | |
9e5987a7 DC |
2497 | if (cur == NULL) |
2498 | rval = XFS_ILOG_DEXT; | |
2499 | else { | |
2500 | rval = 0; | |
2501 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2502 | new->br_startblock, new->br_blockcount, | |
2503 | &i))) | |
2504 | goto done; | |
c29aad41 | 2505 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2506 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
2507 | new->br_startblock, new->br_blockcount, | |
2508 | newext))) | |
2509 | goto done; | |
2510 | } | |
2511 | break; | |
1e82379b | 2512 | |
9e5987a7 DC |
2513 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
2514 | /* | |
2515 | * Setting the first part of a previous oldext extent to newext. | |
2516 | * The left neighbor is contiguous. | |
2517 | */ | |
2518 | trace_xfs_bmap_pre_update(ip, *idx - 1, state, _THIS_IP_); | |
2519 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx - 1), | |
2520 | LEFT.br_blockcount + new->br_blockcount); | |
2521 | xfs_bmbt_set_startoff(ep, | |
2522 | PREV.br_startoff + new->br_blockcount); | |
2523 | trace_xfs_bmap_post_update(ip, *idx - 1, state, _THIS_IP_); | |
1da177e4 | 2524 | |
9e5987a7 DC |
2525 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2526 | xfs_bmbt_set_startblock(ep, | |
2527 | new->br_startblock + new->br_blockcount); | |
2528 | xfs_bmbt_set_blockcount(ep, | |
2529 | PREV.br_blockcount - new->br_blockcount); | |
2530 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
0293ce3a | 2531 | |
9e5987a7 | 2532 | --*idx; |
8867bc9b | 2533 | |
9e5987a7 DC |
2534 | if (cur == NULL) |
2535 | rval = XFS_ILOG_DEXT; | |
2536 | else { | |
2537 | rval = 0; | |
2538 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2539 | PREV.br_startblock, PREV.br_blockcount, | |
2540 | &i))) | |
2541 | goto done; | |
c29aad41 | 2542 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2543 | if ((error = xfs_bmbt_update(cur, |
2544 | PREV.br_startoff + new->br_blockcount, | |
2545 | PREV.br_startblock + new->br_blockcount, | |
2546 | PREV.br_blockcount - new->br_blockcount, | |
2547 | oldext))) | |
2548 | goto done; | |
2549 | if ((error = xfs_btree_decrement(cur, 0, &i))) | |
2550 | goto done; | |
2551 | error = xfs_bmbt_update(cur, LEFT.br_startoff, | |
2552 | LEFT.br_startblock, | |
2553 | LEFT.br_blockcount + new->br_blockcount, | |
2554 | LEFT.br_state); | |
2555 | if (error) | |
2556 | goto done; | |
8867bc9b | 2557 | } |
9e5987a7 | 2558 | break; |
0293ce3a | 2559 | |
9e5987a7 DC |
2560 | case BMAP_LEFT_FILLING: |
2561 | /* | |
2562 | * Setting the first part of a previous oldext extent to newext. | |
2563 | * The left neighbor is not contiguous. | |
2564 | */ | |
2565 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2566 | ASSERT(ep && xfs_bmbt_get_state(ep) == oldext); | |
2567 | xfs_bmbt_set_startoff(ep, new_endoff); | |
2568 | xfs_bmbt_set_blockcount(ep, | |
2569 | PREV.br_blockcount - new->br_blockcount); | |
2570 | xfs_bmbt_set_startblock(ep, | |
2571 | new->br_startblock + new->br_blockcount); | |
2572 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2573 | |
9e5987a7 DC |
2574 | xfs_iext_insert(ip, *idx, 1, new, state); |
2575 | ip->i_d.di_nextents++; | |
2576 | if (cur == NULL) | |
2577 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2578 | else { | |
2579 | rval = XFS_ILOG_CORE; | |
2580 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2581 | PREV.br_startblock, PREV.br_blockcount, | |
2582 | &i))) | |
2583 | goto done; | |
c29aad41 | 2584 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2585 | if ((error = xfs_bmbt_update(cur, |
2586 | PREV.br_startoff + new->br_blockcount, | |
2587 | PREV.br_startblock + new->br_blockcount, | |
2588 | PREV.br_blockcount - new->br_blockcount, | |
2589 | oldext))) | |
2590 | goto done; | |
2591 | cur->bc_rec.b = *new; | |
2592 | if ((error = xfs_btree_insert(cur, &i))) | |
2593 | goto done; | |
c29aad41 | 2594 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2595 | } |
2596 | break; | |
1da177e4 | 2597 | |
9e5987a7 DC |
2598 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
2599 | /* | |
2600 | * Setting the last part of a previous oldext extent to newext. | |
2601 | * The right neighbor is contiguous with the new allocation. | |
2602 | */ | |
2603 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2604 | xfs_bmbt_set_blockcount(ep, | |
2605 | PREV.br_blockcount - new->br_blockcount); | |
2606 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
0293ce3a | 2607 | |
9e5987a7 | 2608 | ++*idx; |
1da177e4 | 2609 | |
9e5987a7 DC |
2610 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2611 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), | |
2612 | new->br_startoff, new->br_startblock, | |
2613 | new->br_blockcount + RIGHT.br_blockcount, newext); | |
2614 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2615 | |
9e5987a7 DC |
2616 | if (cur == NULL) |
2617 | rval = XFS_ILOG_DEXT; | |
2618 | else { | |
2619 | rval = 0; | |
2620 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2621 | PREV.br_startblock, | |
2622 | PREV.br_blockcount, &i))) | |
2623 | goto done; | |
c29aad41 | 2624 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2625 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
2626 | PREV.br_startblock, | |
2627 | PREV.br_blockcount - new->br_blockcount, | |
2628 | oldext))) | |
2629 | goto done; | |
2630 | if ((error = xfs_btree_increment(cur, 0, &i))) | |
2631 | goto done; | |
2632 | if ((error = xfs_bmbt_update(cur, new->br_startoff, | |
2633 | new->br_startblock, | |
2634 | new->br_blockcount + RIGHT.br_blockcount, | |
2635 | newext))) | |
2636 | goto done; | |
2637 | } | |
2638 | break; | |
1da177e4 | 2639 | |
9e5987a7 DC |
2640 | case BMAP_RIGHT_FILLING: |
2641 | /* | |
2642 | * Setting the last part of a previous oldext extent to newext. | |
2643 | * The right neighbor is not contiguous. | |
2644 | */ | |
2645 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2646 | xfs_bmbt_set_blockcount(ep, | |
2647 | PREV.br_blockcount - new->br_blockcount); | |
2648 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2649 | |
9e5987a7 DC |
2650 | ++*idx; |
2651 | xfs_iext_insert(ip, *idx, 1, new, state); | |
d8cc890d | 2652 | |
9e5987a7 DC |
2653 | ip->i_d.di_nextents++; |
2654 | if (cur == NULL) | |
2655 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2656 | else { | |
2657 | rval = XFS_ILOG_CORE; | |
2658 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2659 | PREV.br_startblock, PREV.br_blockcount, | |
2660 | &i))) | |
2661 | goto done; | |
c29aad41 | 2662 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2663 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
2664 | PREV.br_startblock, | |
2665 | PREV.br_blockcount - new->br_blockcount, | |
2666 | oldext))) | |
2667 | goto done; | |
2668 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2669 | new->br_startblock, new->br_blockcount, | |
2670 | &i))) | |
2671 | goto done; | |
c29aad41 | 2672 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2673 | cur->bc_rec.b.br_state = XFS_EXT_NORM; |
2674 | if ((error = xfs_btree_insert(cur, &i))) | |
2675 | goto done; | |
c29aad41 | 2676 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2677 | } |
2678 | break; | |
2679 | ||
2680 | case 0: | |
1da177e4 | 2681 | /* |
9e5987a7 DC |
2682 | * Setting the middle part of a previous oldext extent to |
2683 | * newext. Contiguity is impossible here. | |
2684 | * One extent becomes three extents. | |
1da177e4 | 2685 | */ |
9e5987a7 DC |
2686 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2687 | xfs_bmbt_set_blockcount(ep, | |
2688 | new->br_startoff - PREV.br_startoff); | |
2689 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
898621d5 | 2690 | |
9e5987a7 DC |
2691 | r[0] = *new; |
2692 | r[1].br_startoff = new_endoff; | |
2693 | r[1].br_blockcount = | |
2694 | PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
2695 | r[1].br_startblock = new->br_startblock + new->br_blockcount; | |
2696 | r[1].br_state = oldext; | |
898621d5 | 2697 | |
9e5987a7 DC |
2698 | ++*idx; |
2699 | xfs_iext_insert(ip, *idx, 2, &r[0], state); | |
2700 | ||
2701 | ip->i_d.di_nextents += 2; | |
2702 | if (cur == NULL) | |
2703 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
2704 | else { | |
2705 | rval = XFS_ILOG_CORE; | |
2706 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
2707 | PREV.br_startblock, PREV.br_blockcount, | |
2708 | &i))) | |
2709 | goto done; | |
c29aad41 | 2710 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2711 | /* new right extent - oldext */ |
2712 | if ((error = xfs_bmbt_update(cur, r[1].br_startoff, | |
2713 | r[1].br_startblock, r[1].br_blockcount, | |
2714 | r[1].br_state))) | |
2715 | goto done; | |
2716 | /* new left extent - oldext */ | |
2717 | cur->bc_rec.b = PREV; | |
2718 | cur->bc_rec.b.br_blockcount = | |
2719 | new->br_startoff - PREV.br_startoff; | |
2720 | if ((error = xfs_btree_insert(cur, &i))) | |
2721 | goto done; | |
c29aad41 | 2722 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
2723 | /* |
2724 | * Reset the cursor to the position of the new extent | |
2725 | * we are about to insert as we can't trust it after | |
2726 | * the previous insert. | |
2727 | */ | |
2728 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
2729 | new->br_startblock, new->br_blockcount, | |
2730 | &i))) | |
2731 | goto done; | |
c29aad41 | 2732 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
2733 | /* new middle extent - newext */ |
2734 | cur->bc_rec.b.br_state = new->br_state; | |
2735 | if ((error = xfs_btree_insert(cur, &i))) | |
2736 | goto done; | |
c29aad41 | 2737 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 | 2738 | } |
1da177e4 | 2739 | break; |
9e5987a7 DC |
2740 | |
2741 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2742 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2743 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
2744 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
2745 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2746 | case BMAP_LEFT_CONTIG: | |
2747 | case BMAP_RIGHT_CONTIG: | |
2748 | /* | |
2749 | * These cases are all impossible. | |
2750 | */ | |
1da177e4 | 2751 | ASSERT(0); |
1da177e4 | 2752 | } |
8096b1eb | 2753 | |
9e5987a7 DC |
2754 | /* convert to a btree if necessary */ |
2755 | if (xfs_bmap_needs_btree(ip, XFS_DATA_FORK)) { | |
2756 | int tmp_logflags; /* partial log flag return val */ | |
2757 | ||
2758 | ASSERT(cur == NULL); | |
2759 | error = xfs_bmap_extents_to_btree(tp, ip, first, flist, &cur, | |
2760 | 0, &tmp_logflags, XFS_DATA_FORK); | |
2761 | *logflagsp |= tmp_logflags; | |
2762 | if (error) | |
2763 | goto done; | |
1da177e4 | 2764 | } |
da087bad | 2765 | |
9e5987a7 DC |
2766 | /* clear out the allocated field, done with it now in any case. */ |
2767 | if (cur) { | |
2768 | cur->bc_private.b.allocated = 0; | |
2769 | *curp = cur; | |
1da177e4 | 2770 | } |
8096b1eb | 2771 | |
9e5987a7 DC |
2772 | xfs_bmap_check_leaf_extents(*curp, ip, XFS_DATA_FORK); |
2773 | done: | |
2774 | *logflagsp |= rval; | |
1da177e4 | 2775 | return error; |
9e5987a7 DC |
2776 | #undef LEFT |
2777 | #undef RIGHT | |
2778 | #undef PREV | |
1da177e4 LT |
2779 | } |
2780 | ||
2781 | /* | |
9e5987a7 | 2782 | * Convert a hole to a delayed allocation. |
1da177e4 | 2783 | */ |
9e5987a7 DC |
2784 | STATIC void |
2785 | xfs_bmap_add_extent_hole_delay( | |
2786 | xfs_inode_t *ip, /* incore inode pointer */ | |
2787 | xfs_extnum_t *idx, /* extent number to update/insert */ | |
2788 | xfs_bmbt_irec_t *new) /* new data to add to file extents */ | |
1da177e4 | 2789 | { |
9e5987a7 DC |
2790 | xfs_ifork_t *ifp; /* inode fork pointer */ |
2791 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ | |
2792 | xfs_filblks_t newlen=0; /* new indirect size */ | |
2793 | xfs_filblks_t oldlen=0; /* old indirect size */ | |
2794 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
2795 | int state; /* state bits, accessed thru macros */ | |
2796 | xfs_filblks_t temp=0; /* temp for indirect calculations */ | |
1da177e4 | 2797 | |
9e5987a7 DC |
2798 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
2799 | state = 0; | |
2800 | ASSERT(isnullstartblock(new->br_startblock)); | |
1da177e4 LT |
2801 | |
2802 | /* | |
9e5987a7 | 2803 | * Check and set flags if this segment has a left neighbor |
1da177e4 | 2804 | */ |
9e5987a7 DC |
2805 | if (*idx > 0) { |
2806 | state |= BMAP_LEFT_VALID; | |
2807 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx - 1), &left); | |
2808 | ||
2809 | if (isnullstartblock(left.br_startblock)) | |
2810 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 2811 | } |
1da177e4 | 2812 | |
9e5987a7 DC |
2813 | /* |
2814 | * Check and set flags if the current (right) segment exists. | |
2815 | * If it doesn't exist, we're converting the hole at end-of-file. | |
2816 | */ | |
2817 | if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { | |
2818 | state |= BMAP_RIGHT_VALID; | |
2819 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right); | |
1da177e4 | 2820 | |
9e5987a7 DC |
2821 | if (isnullstartblock(right.br_startblock)) |
2822 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 2823 | } |
9e5987a7 | 2824 | |
1da177e4 | 2825 | /* |
9e5987a7 DC |
2826 | * Set contiguity flags on the left and right neighbors. |
2827 | * Don't let extents get too large, even if the pieces are contiguous. | |
1da177e4 | 2828 | */ |
9e5987a7 DC |
2829 | if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) && |
2830 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
2831 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2832 | state |= BMAP_LEFT_CONTIG; | |
2833 | ||
2834 | if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) && | |
2835 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
2836 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
2837 | (!(state & BMAP_LEFT_CONTIG) || | |
2838 | (left.br_blockcount + new->br_blockcount + | |
2839 | right.br_blockcount <= MAXEXTLEN))) | |
2840 | state |= BMAP_RIGHT_CONTIG; | |
cc09c0dc DC |
2841 | |
2842 | /* | |
9e5987a7 | 2843 | * Switch out based on the contiguity flags. |
cc09c0dc | 2844 | */ |
9e5987a7 DC |
2845 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { |
2846 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
2847 | /* | |
2848 | * New allocation is contiguous with delayed allocations | |
2849 | * on the left and on the right. | |
2850 | * Merge all three into a single extent record. | |
2851 | */ | |
2852 | --*idx; | |
2853 | temp = left.br_blockcount + new->br_blockcount + | |
2854 | right.br_blockcount; | |
cc09c0dc | 2855 | |
9e5987a7 DC |
2856 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2857 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); | |
2858 | oldlen = startblockval(left.br_startblock) + | |
2859 | startblockval(new->br_startblock) + | |
2860 | startblockval(right.br_startblock); | |
2861 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2862 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), | |
2863 | nullstartblock((int)newlen)); | |
2864 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
1da177e4 | 2865 | |
9e5987a7 DC |
2866 | xfs_iext_remove(ip, *idx + 1, 1, state); |
2867 | break; | |
1da177e4 | 2868 | |
9e5987a7 DC |
2869 | case BMAP_LEFT_CONTIG: |
2870 | /* | |
2871 | * New allocation is contiguous with a delayed allocation | |
2872 | * on the left. | |
2873 | * Merge the new allocation with the left neighbor. | |
2874 | */ | |
2875 | --*idx; | |
2876 | temp = left.br_blockcount + new->br_blockcount; | |
1da177e4 | 2877 | |
9e5987a7 DC |
2878 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); |
2879 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx), temp); | |
2880 | oldlen = startblockval(left.br_startblock) + | |
2881 | startblockval(new->br_startblock); | |
2882 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2883 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, *idx), | |
2884 | nullstartblock((int)newlen)); | |
2885 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2886 | break; | |
1da177e4 | 2887 | |
9e5987a7 DC |
2888 | case BMAP_RIGHT_CONTIG: |
2889 | /* | |
2890 | * New allocation is contiguous with a delayed allocation | |
2891 | * on the right. | |
2892 | * Merge the new allocation with the right neighbor. | |
2893 | */ | |
2894 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
2895 | temp = new->br_blockcount + right.br_blockcount; | |
2896 | oldlen = startblockval(new->br_startblock) + | |
2897 | startblockval(right.br_startblock); | |
2898 | newlen = xfs_bmap_worst_indlen(ip, temp); | |
2899 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx), | |
2900 | new->br_startoff, | |
2901 | nullstartblock((int)newlen), temp, right.br_state); | |
2902 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
2903 | break; | |
2904 | ||
2905 | case 0: | |
2906 | /* | |
2907 | * New allocation is not contiguous with another | |
2908 | * delayed allocation. | |
2909 | * Insert a new entry. | |
2910 | */ | |
2911 | oldlen = newlen = 0; | |
2912 | xfs_iext_insert(ip, *idx, 1, new, state); | |
2913 | break; | |
1da177e4 | 2914 | } |
9e5987a7 DC |
2915 | if (oldlen != newlen) { |
2916 | ASSERT(oldlen > newlen); | |
0d485ada DC |
2917 | xfs_mod_fdblocks(ip->i_mount, (int64_t)(oldlen - newlen), |
2918 | false); | |
1da177e4 | 2919 | /* |
9e5987a7 | 2920 | * Nothing to do for disk quota accounting here. |
1da177e4 | 2921 | */ |
1da177e4 | 2922 | } |
1da177e4 LT |
2923 | } |
2924 | ||
2925 | /* | |
9e5987a7 | 2926 | * Convert a hole to a real allocation. |
1da177e4 | 2927 | */ |
9e5987a7 DC |
2928 | STATIC int /* error */ |
2929 | xfs_bmap_add_extent_hole_real( | |
2930 | struct xfs_bmalloca *bma, | |
2931 | int whichfork) | |
27a3f8f2 | 2932 | { |
9e5987a7 DC |
2933 | struct xfs_bmbt_irec *new = &bma->got; |
2934 | int error; /* error return value */ | |
2935 | int i; /* temp state */ | |
2936 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
2937 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ | |
2938 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
2939 | int rval=0; /* return value (logging flags) */ | |
2940 | int state; /* state bits, accessed thru macros */ | |
c29aad41 | 2941 | struct xfs_mount *mp; |
27a3f8f2 | 2942 | |
c29aad41 | 2943 | mp = bma->tp ? bma->tp->t_mountp : NULL; |
9e5987a7 | 2944 | ifp = XFS_IFORK_PTR(bma->ip, whichfork); |
27a3f8f2 | 2945 | |
9e5987a7 DC |
2946 | ASSERT(bma->idx >= 0); |
2947 | ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec)); | |
2948 | ASSERT(!isnullstartblock(new->br_startblock)); | |
2949 | ASSERT(!bma->cur || | |
2950 | !(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL)); | |
27a3f8f2 | 2951 | |
9e5987a7 | 2952 | XFS_STATS_INC(xs_add_exlist); |
27a3f8f2 | 2953 | |
9e5987a7 DC |
2954 | state = 0; |
2955 | if (whichfork == XFS_ATTR_FORK) | |
2956 | state |= BMAP_ATTRFORK; | |
27a3f8f2 | 2957 | |
9e5987a7 DC |
2958 | /* |
2959 | * Check and set flags if this segment has a left neighbor. | |
2960 | */ | |
2961 | if (bma->idx > 0) { | |
2962 | state |= BMAP_LEFT_VALID; | |
2963 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), &left); | |
2964 | if (isnullstartblock(left.br_startblock)) | |
2965 | state |= BMAP_LEFT_DELAY; | |
2966 | } | |
27a3f8f2 CH |
2967 | |
2968 | /* | |
9e5987a7 DC |
2969 | * Check and set flags if this segment has a current value. |
2970 | * Not true if we're inserting into the "hole" at eof. | |
27a3f8f2 | 2971 | */ |
9e5987a7 DC |
2972 | if (bma->idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { |
2973 | state |= BMAP_RIGHT_VALID; | |
2974 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &right); | |
2975 | if (isnullstartblock(right.br_startblock)) | |
2976 | state |= BMAP_RIGHT_DELAY; | |
2977 | } | |
27a3f8f2 | 2978 | |
9e5987a7 DC |
2979 | /* |
2980 | * We're inserting a real allocation between "left" and "right". | |
2981 | * Set the contiguity flags. Don't let extents get too large. | |
2982 | */ | |
2983 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
2984 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
2985 | left.br_startblock + left.br_blockcount == new->br_startblock && | |
2986 | left.br_state == new->br_state && | |
2987 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
2988 | state |= BMAP_LEFT_CONTIG; | |
27a3f8f2 | 2989 | |
9e5987a7 DC |
2990 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && |
2991 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
2992 | new->br_startblock + new->br_blockcount == right.br_startblock && | |
2993 | new->br_state == right.br_state && | |
2994 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
2995 | (!(state & BMAP_LEFT_CONTIG) || | |
2996 | left.br_blockcount + new->br_blockcount + | |
2997 | right.br_blockcount <= MAXEXTLEN)) | |
2998 | state |= BMAP_RIGHT_CONTIG; | |
27a3f8f2 | 2999 | |
9e5987a7 DC |
3000 | error = 0; |
3001 | /* | |
3002 | * Select which case we're in here, and implement it. | |
3003 | */ | |
3004 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { | |
3005 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
3006 | /* | |
3007 | * New allocation is contiguous with real allocations on the | |
3008 | * left and on the right. | |
3009 | * Merge all three into a single extent record. | |
3010 | */ | |
3011 | --bma->idx; | |
3012 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3013 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
3014 | left.br_blockcount + new->br_blockcount + | |
3015 | right.br_blockcount); | |
3016 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
27a3f8f2 | 3017 | |
9e5987a7 | 3018 | xfs_iext_remove(bma->ip, bma->idx + 1, 1, state); |
27a3f8f2 | 3019 | |
9e5987a7 DC |
3020 | XFS_IFORK_NEXT_SET(bma->ip, whichfork, |
3021 | XFS_IFORK_NEXTENTS(bma->ip, whichfork) - 1); | |
3022 | if (bma->cur == NULL) { | |
3023 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
3024 | } else { | |
3025 | rval = XFS_ILOG_CORE; | |
3026 | error = xfs_bmbt_lookup_eq(bma->cur, right.br_startoff, | |
3027 | right.br_startblock, right.br_blockcount, | |
3028 | &i); | |
3029 | if (error) | |
3030 | goto done; | |
c29aad41 | 3031 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3032 | error = xfs_btree_delete(bma->cur, &i); |
3033 | if (error) | |
3034 | goto done; | |
c29aad41 | 3035 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3036 | error = xfs_btree_decrement(bma->cur, 0, &i); |
3037 | if (error) | |
3038 | goto done; | |
c29aad41 | 3039 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3040 | error = xfs_bmbt_update(bma->cur, left.br_startoff, |
3041 | left.br_startblock, | |
3042 | left.br_blockcount + | |
3043 | new->br_blockcount + | |
3044 | right.br_blockcount, | |
3045 | left.br_state); | |
3046 | if (error) | |
3047 | goto done; | |
3048 | } | |
3049 | break; | |
27a3f8f2 | 3050 | |
9e5987a7 DC |
3051 | case BMAP_LEFT_CONTIG: |
3052 | /* | |
3053 | * New allocation is contiguous with a real allocation | |
3054 | * on the left. | |
3055 | * Merge the new allocation with the left neighbor. | |
3056 | */ | |
3057 | --bma->idx; | |
3058 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3059 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, bma->idx), | |
3060 | left.br_blockcount + new->br_blockcount); | |
3061 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
1da177e4 | 3062 | |
9e5987a7 DC |
3063 | if (bma->cur == NULL) { |
3064 | rval = xfs_ilog_fext(whichfork); | |
3065 | } else { | |
3066 | rval = 0; | |
3067 | error = xfs_bmbt_lookup_eq(bma->cur, left.br_startoff, | |
3068 | left.br_startblock, left.br_blockcount, | |
3069 | &i); | |
3070 | if (error) | |
3071 | goto done; | |
c29aad41 | 3072 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3073 | error = xfs_bmbt_update(bma->cur, left.br_startoff, |
3074 | left.br_startblock, | |
3075 | left.br_blockcount + | |
3076 | new->br_blockcount, | |
3077 | left.br_state); | |
3078 | if (error) | |
3079 | goto done; | |
3080 | } | |
3081 | break; | |
27a3f8f2 | 3082 | |
9e5987a7 DC |
3083 | case BMAP_RIGHT_CONTIG: |
3084 | /* | |
3085 | * New allocation is contiguous with a real allocation | |
3086 | * on the right. | |
3087 | * Merge the new allocation with the right neighbor. | |
3088 | */ | |
3089 | trace_xfs_bmap_pre_update(bma->ip, bma->idx, state, _THIS_IP_); | |
3090 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, bma->idx), | |
3091 | new->br_startoff, new->br_startblock, | |
3092 | new->br_blockcount + right.br_blockcount, | |
3093 | right.br_state); | |
3094 | trace_xfs_bmap_post_update(bma->ip, bma->idx, state, _THIS_IP_); | |
27a3f8f2 | 3095 | |
9e5987a7 DC |
3096 | if (bma->cur == NULL) { |
3097 | rval = xfs_ilog_fext(whichfork); | |
3098 | } else { | |
3099 | rval = 0; | |
3100 | error = xfs_bmbt_lookup_eq(bma->cur, | |
3101 | right.br_startoff, | |
3102 | right.br_startblock, | |
3103 | right.br_blockcount, &i); | |
3104 | if (error) | |
3105 | goto done; | |
c29aad41 | 3106 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3107 | error = xfs_bmbt_update(bma->cur, new->br_startoff, |
3108 | new->br_startblock, | |
3109 | new->br_blockcount + | |
3110 | right.br_blockcount, | |
3111 | right.br_state); | |
3112 | if (error) | |
3113 | goto done; | |
3114 | } | |
3115 | break; | |
3116 | ||
3117 | case 0: | |
3118 | /* | |
3119 | * New allocation is not contiguous with another | |
3120 | * real allocation. | |
3121 | * Insert a new entry. | |
3122 | */ | |
3123 | xfs_iext_insert(bma->ip, bma->idx, 1, new, state); | |
3124 | XFS_IFORK_NEXT_SET(bma->ip, whichfork, | |
3125 | XFS_IFORK_NEXTENTS(bma->ip, whichfork) + 1); | |
3126 | if (bma->cur == NULL) { | |
3127 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); | |
3128 | } else { | |
3129 | rval = XFS_ILOG_CORE; | |
3130 | error = xfs_bmbt_lookup_eq(bma->cur, | |
3131 | new->br_startoff, | |
3132 | new->br_startblock, | |
3133 | new->br_blockcount, &i); | |
3134 | if (error) | |
3135 | goto done; | |
c29aad41 | 3136 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, done); |
9e5987a7 DC |
3137 | bma->cur->bc_rec.b.br_state = new->br_state; |
3138 | error = xfs_btree_insert(bma->cur, &i); | |
3139 | if (error) | |
3140 | goto done; | |
c29aad41 | 3141 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
3142 | } |
3143 | break; | |
3144 | } | |
3145 | ||
3146 | /* convert to a btree if necessary */ | |
3147 | if (xfs_bmap_needs_btree(bma->ip, whichfork)) { | |
3148 | int tmp_logflags; /* partial log flag return val */ | |
3149 | ||
3150 | ASSERT(bma->cur == NULL); | |
3151 | error = xfs_bmap_extents_to_btree(bma->tp, bma->ip, | |
3152 | bma->firstblock, bma->flist, &bma->cur, | |
3153 | 0, &tmp_logflags, whichfork); | |
3154 | bma->logflags |= tmp_logflags; | |
3155 | if (error) | |
3156 | goto done; | |
3157 | } | |
3158 | ||
3159 | /* clear out the allocated field, done with it now in any case. */ | |
3160 | if (bma->cur) | |
3161 | bma->cur->bc_private.b.allocated = 0; | |
3162 | ||
3163 | xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork); | |
3164 | done: | |
3165 | bma->logflags |= rval; | |
3166 | return error; | |
1da177e4 LT |
3167 | } |
3168 | ||
3169 | /* | |
9e5987a7 | 3170 | * Functions used in the extent read, allocate and remove paths |
1da177e4 | 3171 | */ |
1da177e4 | 3172 | |
9e5987a7 DC |
3173 | /* |
3174 | * Adjust the size of the new extent based on di_extsize and rt extsize. | |
3175 | */ | |
68988114 | 3176 | int |
9e5987a7 DC |
3177 | xfs_bmap_extsize_align( |
3178 | xfs_mount_t *mp, | |
3179 | xfs_bmbt_irec_t *gotp, /* next extent pointer */ | |
3180 | xfs_bmbt_irec_t *prevp, /* previous extent pointer */ | |
3181 | xfs_extlen_t extsz, /* align to this extent size */ | |
3182 | int rt, /* is this a realtime inode? */ | |
3183 | int eof, /* is extent at end-of-file? */ | |
3184 | int delay, /* creating delalloc extent? */ | |
3185 | int convert, /* overwriting unwritten extent? */ | |
3186 | xfs_fileoff_t *offp, /* in/out: aligned offset */ | |
3187 | xfs_extlen_t *lenp) /* in/out: aligned length */ | |
4e8938fe | 3188 | { |
9e5987a7 DC |
3189 | xfs_fileoff_t orig_off; /* original offset */ |
3190 | xfs_extlen_t orig_alen; /* original length */ | |
3191 | xfs_fileoff_t orig_end; /* original off+len */ | |
3192 | xfs_fileoff_t nexto; /* next file offset */ | |
3193 | xfs_fileoff_t prevo; /* previous file offset */ | |
3194 | xfs_fileoff_t align_off; /* temp for offset */ | |
3195 | xfs_extlen_t align_alen; /* temp for length */ | |
3196 | xfs_extlen_t temp; /* temp for calculations */ | |
4e8938fe | 3197 | |
9e5987a7 | 3198 | if (convert) |
4e8938fe | 3199 | return 0; |
4e8938fe | 3200 | |
9e5987a7 DC |
3201 | orig_off = align_off = *offp; |
3202 | orig_alen = align_alen = *lenp; | |
3203 | orig_end = orig_off + orig_alen; | |
1da177e4 | 3204 | |
1da177e4 | 3205 | /* |
9e5987a7 DC |
3206 | * If this request overlaps an existing extent, then don't |
3207 | * attempt to perform any additional alignment. | |
1da177e4 | 3208 | */ |
9e5987a7 DC |
3209 | if (!delay && !eof && |
3210 | (orig_off >= gotp->br_startoff) && | |
3211 | (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { | |
3212 | return 0; | |
3213 | } | |
3214 | ||
1da177e4 | 3215 | /* |
9e5987a7 DC |
3216 | * If the file offset is unaligned vs. the extent size |
3217 | * we need to align it. This will be possible unless | |
3218 | * the file was previously written with a kernel that didn't | |
3219 | * perform this alignment, or if a truncate shot us in the | |
3220 | * foot. | |
1da177e4 | 3221 | */ |
9e5987a7 DC |
3222 | temp = do_mod(orig_off, extsz); |
3223 | if (temp) { | |
3224 | align_alen += temp; | |
3225 | align_off -= temp; | |
1da177e4 | 3226 | } |
6dea405e DC |
3227 | |
3228 | /* Same adjustment for the end of the requested area. */ | |
3229 | temp = (align_alen % extsz); | |
3230 | if (temp) | |
3231 | align_alen += extsz - temp; | |
3232 | ||
1da177e4 | 3233 | /* |
6dea405e DC |
3234 | * For large extent hint sizes, the aligned extent might be larger than |
3235 | * MAXEXTLEN. In that case, reduce the size by an extsz so that it pulls | |
3236 | * the length back under MAXEXTLEN. The outer allocation loops handle | |
3237 | * short allocation just fine, so it is safe to do this. We only want to | |
3238 | * do it when we are forced to, though, because it means more allocation | |
3239 | * operations are required. | |
1da177e4 | 3240 | */ |
6dea405e DC |
3241 | while (align_alen > MAXEXTLEN) |
3242 | align_alen -= extsz; | |
3243 | ASSERT(align_alen <= MAXEXTLEN); | |
3244 | ||
1da177e4 | 3245 | /* |
9e5987a7 DC |
3246 | * If the previous block overlaps with this proposed allocation |
3247 | * then move the start forward without adjusting the length. | |
1da177e4 | 3248 | */ |
9e5987a7 DC |
3249 | if (prevp->br_startoff != NULLFILEOFF) { |
3250 | if (prevp->br_startblock == HOLESTARTBLOCK) | |
3251 | prevo = prevp->br_startoff; | |
3252 | else | |
3253 | prevo = prevp->br_startoff + prevp->br_blockcount; | |
3254 | } else | |
3255 | prevo = 0; | |
3256 | if (align_off != orig_off && align_off < prevo) | |
3257 | align_off = prevo; | |
3258 | /* | |
3259 | * If the next block overlaps with this proposed allocation | |
3260 | * then move the start back without adjusting the length, | |
3261 | * but not before offset 0. | |
3262 | * This may of course make the start overlap previous block, | |
3263 | * and if we hit the offset 0 limit then the next block | |
3264 | * can still overlap too. | |
3265 | */ | |
3266 | if (!eof && gotp->br_startoff != NULLFILEOFF) { | |
3267 | if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || | |
3268 | (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) | |
3269 | nexto = gotp->br_startoff + gotp->br_blockcount; | |
3270 | else | |
3271 | nexto = gotp->br_startoff; | |
3272 | } else | |
3273 | nexto = NULLFILEOFF; | |
3274 | if (!eof && | |
3275 | align_off + align_alen != orig_end && | |
3276 | align_off + align_alen > nexto) | |
3277 | align_off = nexto > align_alen ? nexto - align_alen : 0; | |
3278 | /* | |
3279 | * If we're now overlapping the next or previous extent that | |
3280 | * means we can't fit an extsz piece in this hole. Just move | |
3281 | * the start forward to the first valid spot and set | |
3282 | * the length so we hit the end. | |
3283 | */ | |
3284 | if (align_off != orig_off && align_off < prevo) | |
3285 | align_off = prevo; | |
3286 | if (align_off + align_alen != orig_end && | |
3287 | align_off + align_alen > nexto && | |
3288 | nexto != NULLFILEOFF) { | |
3289 | ASSERT(nexto > prevo); | |
3290 | align_alen = nexto - align_off; | |
3291 | } | |
1da177e4 | 3292 | |
9e5987a7 DC |
3293 | /* |
3294 | * If realtime, and the result isn't a multiple of the realtime | |
3295 | * extent size we need to remove blocks until it is. | |
3296 | */ | |
3297 | if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { | |
1da177e4 | 3298 | /* |
9e5987a7 DC |
3299 | * We're not covering the original request, or |
3300 | * we won't be able to once we fix the length. | |
1da177e4 | 3301 | */ |
9e5987a7 DC |
3302 | if (orig_off < align_off || |
3303 | orig_end > align_off + align_alen || | |
3304 | align_alen - temp < orig_alen) | |
2451337d | 3305 | return -EINVAL; |
1da177e4 | 3306 | /* |
9e5987a7 | 3307 | * Try to fix it by moving the start up. |
1da177e4 | 3308 | */ |
9e5987a7 DC |
3309 | if (align_off + temp <= orig_off) { |
3310 | align_alen -= temp; | |
3311 | align_off += temp; | |
1da177e4 | 3312 | } |
9e5987a7 DC |
3313 | /* |
3314 | * Try to fix it by moving the end in. | |
3315 | */ | |
3316 | else if (align_off + align_alen - temp >= orig_end) | |
3317 | align_alen -= temp; | |
3318 | /* | |
3319 | * Set the start to the minimum then trim the length. | |
3320 | */ | |
3321 | else { | |
3322 | align_alen -= orig_off - align_off; | |
3323 | align_off = orig_off; | |
3324 | align_alen -= align_alen % mp->m_sb.sb_rextsize; | |
1da177e4 | 3325 | } |
1da177e4 | 3326 | /* |
9e5987a7 | 3327 | * Result doesn't cover the request, fail it. |
1da177e4 | 3328 | */ |
9e5987a7 | 3329 | if (orig_off < align_off || orig_end > align_off + align_alen) |
2451337d | 3330 | return -EINVAL; |
9e5987a7 DC |
3331 | } else { |
3332 | ASSERT(orig_off >= align_off); | |
6dea405e DC |
3333 | /* see MAXEXTLEN handling above */ |
3334 | ASSERT(orig_end <= align_off + align_alen || | |
3335 | align_alen + extsz > MAXEXTLEN); | |
1da177e4 | 3336 | } |
1da177e4 | 3337 | |
0b1b213f | 3338 | #ifdef DEBUG |
9e5987a7 DC |
3339 | if (!eof && gotp->br_startoff != NULLFILEOFF) |
3340 | ASSERT(align_off + align_alen <= gotp->br_startoff); | |
3341 | if (prevp->br_startoff != NULLFILEOFF) | |
3342 | ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); | |
3343 | #endif | |
1da177e4 | 3344 | |
9e5987a7 DC |
3345 | *lenp = align_alen; |
3346 | *offp = align_off; | |
3347 | return 0; | |
1da177e4 | 3348 | } |
1da177e4 | 3349 | |
9e5987a7 DC |
3350 | #define XFS_ALLOC_GAP_UNITS 4 |
3351 | ||
68988114 | 3352 | void |
9e5987a7 | 3353 | xfs_bmap_adjacent( |
68988114 | 3354 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
1da177e4 | 3355 | { |
9e5987a7 DC |
3356 | xfs_fsblock_t adjust; /* adjustment to block numbers */ |
3357 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ | |
3358 | xfs_mount_t *mp; /* mount point structure */ | |
3359 | int nullfb; /* true if ap->firstblock isn't set */ | |
3360 | int rt; /* true if inode is realtime */ | |
1da177e4 | 3361 | |
9e5987a7 DC |
3362 | #define ISVALID(x,y) \ |
3363 | (rt ? \ | |
3364 | (x) < mp->m_sb.sb_rblocks : \ | |
3365 | XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ | |
3366 | XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ | |
3367 | XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) | |
1da177e4 | 3368 | |
9e5987a7 DC |
3369 | mp = ap->ip->i_mount; |
3370 | nullfb = *ap->firstblock == NULLFSBLOCK; | |
3371 | rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata; | |
3372 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); | |
3373 | /* | |
3374 | * If allocating at eof, and there's a previous real block, | |
3375 | * try to use its last block as our starting point. | |
3376 | */ | |
3377 | if (ap->eof && ap->prev.br_startoff != NULLFILEOFF && | |
3378 | !isnullstartblock(ap->prev.br_startblock) && | |
3379 | ISVALID(ap->prev.br_startblock + ap->prev.br_blockcount, | |
3380 | ap->prev.br_startblock)) { | |
3381 | ap->blkno = ap->prev.br_startblock + ap->prev.br_blockcount; | |
3382 | /* | |
3383 | * Adjust for the gap between prevp and us. | |
3384 | */ | |
3385 | adjust = ap->offset - | |
3386 | (ap->prev.br_startoff + ap->prev.br_blockcount); | |
3387 | if (adjust && | |
3388 | ISVALID(ap->blkno + adjust, ap->prev.br_startblock)) | |
3389 | ap->blkno += adjust; | |
3390 | } | |
3391 | /* | |
3392 | * If not at eof, then compare the two neighbor blocks. | |
3393 | * Figure out whether either one gives us a good starting point, | |
3394 | * and pick the better one. | |
3395 | */ | |
3396 | else if (!ap->eof) { | |
3397 | xfs_fsblock_t gotbno; /* right side block number */ | |
3398 | xfs_fsblock_t gotdiff=0; /* right side difference */ | |
3399 | xfs_fsblock_t prevbno; /* left side block number */ | |
3400 | xfs_fsblock_t prevdiff=0; /* left side difference */ | |
3401 | ||
3402 | /* | |
3403 | * If there's a previous (left) block, select a requested | |
3404 | * start block based on it. | |
3405 | */ | |
3406 | if (ap->prev.br_startoff != NULLFILEOFF && | |
3407 | !isnullstartblock(ap->prev.br_startblock) && | |
3408 | (prevbno = ap->prev.br_startblock + | |
3409 | ap->prev.br_blockcount) && | |
3410 | ISVALID(prevbno, ap->prev.br_startblock)) { | |
3411 | /* | |
3412 | * Calculate gap to end of previous block. | |
3413 | */ | |
3414 | adjust = prevdiff = ap->offset - | |
3415 | (ap->prev.br_startoff + | |
3416 | ap->prev.br_blockcount); | |
3417 | /* | |
3418 | * Figure the startblock based on the previous block's | |
3419 | * end and the gap size. | |
3420 | * Heuristic! | |
3421 | * If the gap is large relative to the piece we're | |
3422 | * allocating, or using it gives us an invalid block | |
3423 | * number, then just use the end of the previous block. | |
3424 | */ | |
3425 | if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->length && | |
3426 | ISVALID(prevbno + prevdiff, | |
3427 | ap->prev.br_startblock)) | |
3428 | prevbno += adjust; | |
3429 | else | |
3430 | prevdiff += adjust; | |
3431 | /* | |
3432 | * If the firstblock forbids it, can't use it, | |
3433 | * must use default. | |
3434 | */ | |
3435 | if (!rt && !nullfb && | |
3436 | XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) | |
3437 | prevbno = NULLFSBLOCK; | |
1da177e4 | 3438 | } |
9e5987a7 DC |
3439 | /* |
3440 | * No previous block or can't follow it, just default. | |
3441 | */ | |
3442 | else | |
3443 | prevbno = NULLFSBLOCK; | |
3444 | /* | |
3445 | * If there's a following (right) block, select a requested | |
3446 | * start block based on it. | |
3447 | */ | |
3448 | if (!isnullstartblock(ap->got.br_startblock)) { | |
3449 | /* | |
3450 | * Calculate gap to start of next block. | |
3451 | */ | |
3452 | adjust = gotdiff = ap->got.br_startoff - ap->offset; | |
3453 | /* | |
3454 | * Figure the startblock based on the next block's | |
3455 | * start and the gap size. | |
3456 | */ | |
3457 | gotbno = ap->got.br_startblock; | |
3458 | /* | |
3459 | * Heuristic! | |
3460 | * If the gap is large relative to the piece we're | |
3461 | * allocating, or using it gives us an invalid block | |
3462 | * number, then just use the start of the next block | |
3463 | * offset by our length. | |
3464 | */ | |
3465 | if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->length && | |
3466 | ISVALID(gotbno - gotdiff, gotbno)) | |
3467 | gotbno -= adjust; | |
3468 | else if (ISVALID(gotbno - ap->length, gotbno)) { | |
3469 | gotbno -= ap->length; | |
3470 | gotdiff += adjust - ap->length; | |
3471 | } else | |
3472 | gotdiff += adjust; | |
3473 | /* | |
3474 | * If the firstblock forbids it, can't use it, | |
3475 | * must use default. | |
3476 | */ | |
3477 | if (!rt && !nullfb && | |
3478 | XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) | |
3479 | gotbno = NULLFSBLOCK; | |
3480 | } | |
3481 | /* | |
3482 | * No next block, just default. | |
3483 | */ | |
3484 | else | |
3485 | gotbno = NULLFSBLOCK; | |
3486 | /* | |
3487 | * If both valid, pick the better one, else the only good | |
3488 | * one, else ap->blkno is already set (to 0 or the inode block). | |
3489 | */ | |
3490 | if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) | |
3491 | ap->blkno = prevdiff <= gotdiff ? prevbno : gotbno; | |
3492 | else if (prevbno != NULLFSBLOCK) | |
3493 | ap->blkno = prevbno; | |
3494 | else if (gotbno != NULLFSBLOCK) | |
3495 | ap->blkno = gotbno; | |
1da177e4 | 3496 | } |
9e5987a7 | 3497 | #undef ISVALID |
1da177e4 | 3498 | } |
1da177e4 | 3499 | |
c977eb10 CH |
3500 | static int |
3501 | xfs_bmap_longest_free_extent( | |
3502 | struct xfs_trans *tp, | |
3503 | xfs_agnumber_t ag, | |
3504 | xfs_extlen_t *blen, | |
3505 | int *notinit) | |
3506 | { | |
3507 | struct xfs_mount *mp = tp->t_mountp; | |
3508 | struct xfs_perag *pag; | |
3509 | xfs_extlen_t longest; | |
3510 | int error = 0; | |
3511 | ||
3512 | pag = xfs_perag_get(mp, ag); | |
3513 | if (!pag->pagf_init) { | |
3514 | error = xfs_alloc_pagf_init(mp, tp, ag, XFS_ALLOC_FLAG_TRYLOCK); | |
3515 | if (error) | |
3516 | goto out; | |
3517 | ||
3518 | if (!pag->pagf_init) { | |
3519 | *notinit = 1; | |
3520 | goto out; | |
3521 | } | |
3522 | } | |
3523 | ||
3524 | longest = xfs_alloc_longest_free_extent(mp, pag); | |
3525 | if (*blen < longest) | |
3526 | *blen = longest; | |
3527 | ||
3528 | out: | |
3529 | xfs_perag_put(pag); | |
3530 | return error; | |
3531 | } | |
3532 | ||
3533 | static void | |
3534 | xfs_bmap_select_minlen( | |
3535 | struct xfs_bmalloca *ap, | |
3536 | struct xfs_alloc_arg *args, | |
3537 | xfs_extlen_t *blen, | |
3538 | int notinit) | |
3539 | { | |
3540 | if (notinit || *blen < ap->minlen) { | |
3541 | /* | |
3542 | * Since we did a BUF_TRYLOCK above, it is possible that | |
3543 | * there is space for this request. | |
3544 | */ | |
3545 | args->minlen = ap->minlen; | |
3546 | } else if (*blen < args->maxlen) { | |
3547 | /* | |
3548 | * If the best seen length is less than the request length, | |
3549 | * use the best as the minimum. | |
3550 | */ | |
3551 | args->minlen = *blen; | |
3552 | } else { | |
3553 | /* | |
3554 | * Otherwise we've seen an extent as big as maxlen, use that | |
3555 | * as the minimum. | |
3556 | */ | |
3557 | args->minlen = args->maxlen; | |
3558 | } | |
3559 | } | |
3560 | ||
b64dfe4e | 3561 | STATIC int |
9e5987a7 DC |
3562 | xfs_bmap_btalloc_nullfb( |
3563 | struct xfs_bmalloca *ap, | |
3564 | struct xfs_alloc_arg *args, | |
3565 | xfs_extlen_t *blen) | |
b64dfe4e | 3566 | { |
9e5987a7 | 3567 | struct xfs_mount *mp = ap->ip->i_mount; |
9e5987a7 DC |
3568 | xfs_agnumber_t ag, startag; |
3569 | int notinit = 0; | |
b64dfe4e CH |
3570 | int error; |
3571 | ||
c977eb10 | 3572 | args->type = XFS_ALLOCTYPE_START_BNO; |
9e5987a7 | 3573 | args->total = ap->total; |
b64dfe4e | 3574 | |
9e5987a7 DC |
3575 | startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); |
3576 | if (startag == NULLAGNUMBER) | |
3577 | startag = ag = 0; | |
b64dfe4e | 3578 | |
9e5987a7 | 3579 | while (*blen < args->maxlen) { |
c977eb10 CH |
3580 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, |
3581 | ¬init); | |
3582 | if (error) | |
3583 | return error; | |
b64dfe4e | 3584 | |
9e5987a7 DC |
3585 | if (++ag == mp->m_sb.sb_agcount) |
3586 | ag = 0; | |
3587 | if (ag == startag) | |
3588 | break; | |
9e5987a7 | 3589 | } |
b64dfe4e | 3590 | |
c977eb10 CH |
3591 | xfs_bmap_select_minlen(ap, args, blen, notinit); |
3592 | return 0; | |
3593 | } | |
3594 | ||
3595 | STATIC int | |
3596 | xfs_bmap_btalloc_filestreams( | |
3597 | struct xfs_bmalloca *ap, | |
3598 | struct xfs_alloc_arg *args, | |
3599 | xfs_extlen_t *blen) | |
3600 | { | |
3601 | struct xfs_mount *mp = ap->ip->i_mount; | |
3602 | xfs_agnumber_t ag; | |
3603 | int notinit = 0; | |
3604 | int error; | |
3605 | ||
3606 | args->type = XFS_ALLOCTYPE_NEAR_BNO; | |
3607 | args->total = ap->total; | |
3608 | ||
3609 | ag = XFS_FSB_TO_AGNO(mp, args->fsbno); | |
3610 | if (ag == NULLAGNUMBER) | |
3611 | ag = 0; | |
3612 | ||
3613 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, ¬init); | |
3614 | if (error) | |
3615 | return error; | |
3616 | ||
3617 | if (*blen < args->maxlen) { | |
3618 | error = xfs_filestream_new_ag(ap, &ag); | |
3619 | if (error) | |
3620 | return error; | |
3621 | ||
3622 | error = xfs_bmap_longest_free_extent(args->tp, ag, blen, | |
3623 | ¬init); | |
3624 | if (error) | |
3625 | return error; | |
3626 | ||
3627 | } | |
3628 | ||
3629 | xfs_bmap_select_minlen(ap, args, blen, notinit); | |
b64dfe4e CH |
3630 | |
3631 | /* | |
c977eb10 CH |
3632 | * Set the failure fallback case to look in the selected AG as stream |
3633 | * may have moved. | |
b64dfe4e | 3634 | */ |
c977eb10 | 3635 | ap->blkno = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0); |
b64dfe4e | 3636 | return 0; |
b64dfe4e CH |
3637 | } |
3638 | ||
9e5987a7 DC |
3639 | STATIC int |
3640 | xfs_bmap_btalloc( | |
68988114 | 3641 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
4403280a | 3642 | { |
9e5987a7 DC |
3643 | xfs_mount_t *mp; /* mount point structure */ |
3644 | xfs_alloctype_t atype = 0; /* type for allocation routines */ | |
3645 | xfs_extlen_t align; /* minimum allocation alignment */ | |
3646 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ | |
3647 | xfs_agnumber_t ag; | |
3648 | xfs_alloc_arg_t args; | |
3649 | xfs_extlen_t blen; | |
3650 | xfs_extlen_t nextminlen = 0; | |
3651 | int nullfb; /* true if ap->firstblock isn't set */ | |
3652 | int isaligned; | |
3653 | int tryagain; | |
3654 | int error; | |
33177f05 | 3655 | int stripe_align; |
4403280a | 3656 | |
9e5987a7 | 3657 | ASSERT(ap->length); |
4403280a | 3658 | |
9e5987a7 | 3659 | mp = ap->ip->i_mount; |
33177f05 DC |
3660 | |
3661 | /* stripe alignment for allocation is determined by mount parameters */ | |
3662 | stripe_align = 0; | |
3663 | if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC)) | |
3664 | stripe_align = mp->m_swidth; | |
3665 | else if (mp->m_dalign) | |
3666 | stripe_align = mp->m_dalign; | |
3667 | ||
9e5987a7 DC |
3668 | align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0; |
3669 | if (unlikely(align)) { | |
3670 | error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev, | |
3671 | align, 0, ap->eof, 0, ap->conv, | |
3672 | &ap->offset, &ap->length); | |
3673 | ASSERT(!error); | |
3674 | ASSERT(ap->length); | |
4403280a | 3675 | } |
33177f05 DC |
3676 | |
3677 | ||
9e5987a7 DC |
3678 | nullfb = *ap->firstblock == NULLFSBLOCK; |
3679 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, *ap->firstblock); | |
3680 | if (nullfb) { | |
3681 | if (ap->userdata && xfs_inode_is_filestream(ap->ip)) { | |
3682 | ag = xfs_filestream_lookup_ag(ap->ip); | |
3683 | ag = (ag != NULLAGNUMBER) ? ag : 0; | |
3684 | ap->blkno = XFS_AGB_TO_FSB(mp, ag, 0); | |
3685 | } else { | |
3686 | ap->blkno = XFS_INO_TO_FSB(mp, ap->ip->i_ino); | |
3687 | } | |
3688 | } else | |
3689 | ap->blkno = *ap->firstblock; | |
4403280a | 3690 | |
9e5987a7 | 3691 | xfs_bmap_adjacent(ap); |
4403280a | 3692 | |
9e5987a7 DC |
3693 | /* |
3694 | * If allowed, use ap->blkno; otherwise must use firstblock since | |
3695 | * it's in the right allocation group. | |
3696 | */ | |
3697 | if (nullfb || XFS_FSB_TO_AGNO(mp, ap->blkno) == fb_agno) | |
3698 | ; | |
3699 | else | |
3700 | ap->blkno = *ap->firstblock; | |
3701 | /* | |
3702 | * Normal allocation, done through xfs_alloc_vextent. | |
3703 | */ | |
3704 | tryagain = isaligned = 0; | |
3705 | memset(&args, 0, sizeof(args)); | |
3706 | args.tp = ap->tp; | |
3707 | args.mp = mp; | |
3708 | args.fsbno = ap->blkno; | |
4403280a | 3709 | |
9e5987a7 DC |
3710 | /* Trim the allocation back to the maximum an AG can fit. */ |
3711 | args.maxlen = MIN(ap->length, XFS_ALLOC_AG_MAX_USABLE(mp)); | |
3712 | args.firstblock = *ap->firstblock; | |
3713 | blen = 0; | |
3714 | if (nullfb) { | |
c977eb10 CH |
3715 | /* |
3716 | * Search for an allocation group with a single extent large | |
3717 | * enough for the request. If one isn't found, then adjust | |
3718 | * the minimum allocation size to the largest space found. | |
3719 | */ | |
3720 | if (ap->userdata && xfs_inode_is_filestream(ap->ip)) | |
3721 | error = xfs_bmap_btalloc_filestreams(ap, &args, &blen); | |
3722 | else | |
3723 | error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); | |
4403280a CH |
3724 | if (error) |
3725 | return error; | |
9e5987a7 DC |
3726 | } else if (ap->flist->xbf_low) { |
3727 | if (xfs_inode_is_filestream(ap->ip)) | |
3728 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
3729 | else | |
3730 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3731 | args.total = args.minlen = ap->minlen; | |
3732 | } else { | |
3733 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
3734 | args.total = ap->total; | |
3735 | args.minlen = ap->minlen; | |
4403280a | 3736 | } |
9e5987a7 DC |
3737 | /* apply extent size hints if obtained earlier */ |
3738 | if (unlikely(align)) { | |
3739 | args.prod = align; | |
3740 | if ((args.mod = (xfs_extlen_t)do_mod(ap->offset, args.prod))) | |
3741 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
3742 | } else if (mp->m_sb.sb_blocksize >= PAGE_CACHE_SIZE) { | |
3743 | args.prod = 1; | |
3744 | args.mod = 0; | |
3745 | } else { | |
3746 | args.prod = PAGE_CACHE_SIZE >> mp->m_sb.sb_blocklog; | |
3747 | if ((args.mod = (xfs_extlen_t)(do_mod(ap->offset, args.prod)))) | |
3748 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
4403280a | 3749 | } |
7e47a4ef | 3750 | /* |
9e5987a7 DC |
3751 | * If we are not low on available data blocks, and the |
3752 | * underlying logical volume manager is a stripe, and | |
3753 | * the file offset is zero then try to allocate data | |
3754 | * blocks on stripe unit boundary. | |
3755 | * NOTE: ap->aeof is only set if the allocation length | |
3756 | * is >= the stripe unit and the allocation offset is | |
3757 | * at the end of file. | |
7e47a4ef | 3758 | */ |
9e5987a7 DC |
3759 | if (!ap->flist->xbf_low && ap->aeof) { |
3760 | if (!ap->offset) { | |
33177f05 | 3761 | args.alignment = stripe_align; |
9e5987a7 DC |
3762 | atype = args.type; |
3763 | isaligned = 1; | |
3764 | /* | |
3765 | * Adjust for alignment | |
3766 | */ | |
3767 | if (blen > args.alignment && blen <= args.maxlen) | |
3768 | args.minlen = blen - args.alignment; | |
3769 | args.minalignslop = 0; | |
3770 | } else { | |
3771 | /* | |
3772 | * First try an exact bno allocation. | |
3773 | * If it fails then do a near or start bno | |
3774 | * allocation with alignment turned on. | |
3775 | */ | |
3776 | atype = args.type; | |
3777 | tryagain = 1; | |
3778 | args.type = XFS_ALLOCTYPE_THIS_BNO; | |
3779 | args.alignment = 1; | |
3780 | /* | |
3781 | * Compute the minlen+alignment for the | |
3782 | * next case. Set slop so that the value | |
3783 | * of minlen+alignment+slop doesn't go up | |
3784 | * between the calls. | |
3785 | */ | |
33177f05 DC |
3786 | if (blen > stripe_align && blen <= args.maxlen) |
3787 | nextminlen = blen - stripe_align; | |
9e5987a7 DC |
3788 | else |
3789 | nextminlen = args.minlen; | |
33177f05 | 3790 | if (nextminlen + stripe_align > args.minlen + 1) |
9e5987a7 | 3791 | args.minalignslop = |
33177f05 | 3792 | nextminlen + stripe_align - |
9e5987a7 DC |
3793 | args.minlen - 1; |
3794 | else | |
3795 | args.minalignslop = 0; | |
7e47a4ef DC |
3796 | } |
3797 | } else { | |
9e5987a7 DC |
3798 | args.alignment = 1; |
3799 | args.minalignslop = 0; | |
7e47a4ef | 3800 | } |
9e5987a7 DC |
3801 | args.minleft = ap->minleft; |
3802 | args.wasdel = ap->wasdel; | |
3803 | args.isfl = 0; | |
3804 | args.userdata = ap->userdata; | |
3805 | if ((error = xfs_alloc_vextent(&args))) | |
3806 | return error; | |
3807 | if (tryagain && args.fsbno == NULLFSBLOCK) { | |
3808 | /* | |
3809 | * Exact allocation failed. Now try with alignment | |
3810 | * turned on. | |
3811 | */ | |
3812 | args.type = atype; | |
3813 | args.fsbno = ap->blkno; | |
33177f05 | 3814 | args.alignment = stripe_align; |
9e5987a7 DC |
3815 | args.minlen = nextminlen; |
3816 | args.minalignslop = 0; | |
3817 | isaligned = 1; | |
3818 | if ((error = xfs_alloc_vextent(&args))) | |
3819 | return error; | |
7e47a4ef | 3820 | } |
9e5987a7 DC |
3821 | if (isaligned && args.fsbno == NULLFSBLOCK) { |
3822 | /* | |
3823 | * allocation failed, so turn off alignment and | |
3824 | * try again. | |
3825 | */ | |
3826 | args.type = atype; | |
3827 | args.fsbno = ap->blkno; | |
3828 | args.alignment = 0; | |
3829 | if ((error = xfs_alloc_vextent(&args))) | |
7e47a4ef DC |
3830 | return error; |
3831 | } | |
9e5987a7 DC |
3832 | if (args.fsbno == NULLFSBLOCK && nullfb && |
3833 | args.minlen > ap->minlen) { | |
3834 | args.minlen = ap->minlen; | |
3835 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3836 | args.fsbno = ap->blkno; | |
3837 | if ((error = xfs_alloc_vextent(&args))) | |
3838 | return error; | |
7e47a4ef | 3839 | } |
9e5987a7 DC |
3840 | if (args.fsbno == NULLFSBLOCK && nullfb) { |
3841 | args.fsbno = 0; | |
3842 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
3843 | args.total = ap->minlen; | |
3844 | args.minleft = 0; | |
3845 | if ((error = xfs_alloc_vextent(&args))) | |
3846 | return error; | |
3847 | ap->flist->xbf_low = 1; | |
3848 | } | |
3849 | if (args.fsbno != NULLFSBLOCK) { | |
3850 | /* | |
3851 | * check the allocation happened at the same or higher AG than | |
3852 | * the first block that was allocated. | |
3853 | */ | |
3854 | ASSERT(*ap->firstblock == NULLFSBLOCK || | |
3855 | XFS_FSB_TO_AGNO(mp, *ap->firstblock) == | |
3856 | XFS_FSB_TO_AGNO(mp, args.fsbno) || | |
3857 | (ap->flist->xbf_low && | |
3858 | XFS_FSB_TO_AGNO(mp, *ap->firstblock) < | |
3859 | XFS_FSB_TO_AGNO(mp, args.fsbno))); | |
7e47a4ef | 3860 | |
9e5987a7 DC |
3861 | ap->blkno = args.fsbno; |
3862 | if (*ap->firstblock == NULLFSBLOCK) | |
3863 | *ap->firstblock = args.fsbno; | |
3864 | ASSERT(nullfb || fb_agno == args.agno || | |
3865 | (ap->flist->xbf_low && fb_agno < args.agno)); | |
3866 | ap->length = args.len; | |
3867 | ap->ip->i_d.di_nblocks += args.len; | |
3868 | xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); | |
3869 | if (ap->wasdel) | |
3870 | ap->ip->i_delayed_blks -= args.len; | |
3871 | /* | |
3872 | * Adjust the disk quota also. This was reserved | |
3873 | * earlier. | |
3874 | */ | |
3875 | xfs_trans_mod_dquot_byino(ap->tp, ap->ip, | |
3876 | ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : | |
3877 | XFS_TRANS_DQ_BCOUNT, | |
3878 | (long) args.len); | |
3879 | } else { | |
3880 | ap->blkno = NULLFSBLOCK; | |
3881 | ap->length = 0; | |
3882 | } | |
3883 | return 0; | |
3884 | } | |
7e47a4ef | 3885 | |
9e5987a7 DC |
3886 | /* |
3887 | * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. | |
3888 | * It figures out where to ask the underlying allocator to put the new extent. | |
3889 | */ | |
3890 | STATIC int | |
3891 | xfs_bmap_alloc( | |
68988114 | 3892 | struct xfs_bmalloca *ap) /* bmap alloc argument struct */ |
9e5987a7 DC |
3893 | { |
3894 | if (XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata) | |
3895 | return xfs_bmap_rtalloc(ap); | |
3896 | return xfs_bmap_btalloc(ap); | |
3897 | } | |
a5bd606b | 3898 | |
9e5987a7 DC |
3899 | /* |
3900 | * Trim the returned map to the required bounds | |
3901 | */ | |
3902 | STATIC void | |
3903 | xfs_bmapi_trim_map( | |
3904 | struct xfs_bmbt_irec *mval, | |
3905 | struct xfs_bmbt_irec *got, | |
3906 | xfs_fileoff_t *bno, | |
3907 | xfs_filblks_t len, | |
3908 | xfs_fileoff_t obno, | |
3909 | xfs_fileoff_t end, | |
3910 | int n, | |
3911 | int flags) | |
3912 | { | |
3913 | if ((flags & XFS_BMAPI_ENTIRE) || | |
3914 | got->br_startoff + got->br_blockcount <= obno) { | |
3915 | *mval = *got; | |
3916 | if (isnullstartblock(got->br_startblock)) | |
3917 | mval->br_startblock = DELAYSTARTBLOCK; | |
3918 | return; | |
3919 | } | |
7e47a4ef | 3920 | |
9e5987a7 DC |
3921 | if (obno > *bno) |
3922 | *bno = obno; | |
3923 | ASSERT((*bno >= obno) || (n == 0)); | |
3924 | ASSERT(*bno < end); | |
3925 | mval->br_startoff = *bno; | |
3926 | if (isnullstartblock(got->br_startblock)) | |
3927 | mval->br_startblock = DELAYSTARTBLOCK; | |
3928 | else | |
3929 | mval->br_startblock = got->br_startblock + | |
3930 | (*bno - got->br_startoff); | |
7e47a4ef | 3931 | /* |
9e5987a7 DC |
3932 | * Return the minimum of what we got and what we asked for for |
3933 | * the length. We can use the len variable here because it is | |
3934 | * modified below and we could have been there before coming | |
3935 | * here if the first part of the allocation didn't overlap what | |
3936 | * was asked for. | |
7e47a4ef | 3937 | */ |
9e5987a7 DC |
3938 | mval->br_blockcount = XFS_FILBLKS_MIN(end - *bno, |
3939 | got->br_blockcount - (*bno - got->br_startoff)); | |
3940 | mval->br_state = got->br_state; | |
3941 | ASSERT(mval->br_blockcount <= len); | |
3942 | return; | |
7e47a4ef DC |
3943 | } |
3944 | ||
9e5987a7 DC |
3945 | /* |
3946 | * Update and validate the extent map to return | |
3947 | */ | |
3948 | STATIC void | |
3949 | xfs_bmapi_update_map( | |
3950 | struct xfs_bmbt_irec **map, | |
3951 | xfs_fileoff_t *bno, | |
3952 | xfs_filblks_t *len, | |
3953 | xfs_fileoff_t obno, | |
3954 | xfs_fileoff_t end, | |
3955 | int *n, | |
3956 | int flags) | |
e04426b9 | 3957 | { |
9e5987a7 | 3958 | xfs_bmbt_irec_t *mval = *map; |
e04426b9 | 3959 | |
9e5987a7 DC |
3960 | ASSERT((flags & XFS_BMAPI_ENTIRE) || |
3961 | ((mval->br_startoff + mval->br_blockcount) <= end)); | |
3962 | ASSERT((flags & XFS_BMAPI_ENTIRE) || (mval->br_blockcount <= *len) || | |
3963 | (mval->br_startoff < obno)); | |
e04426b9 | 3964 | |
9e5987a7 DC |
3965 | *bno = mval->br_startoff + mval->br_blockcount; |
3966 | *len = end - *bno; | |
3967 | if (*n > 0 && mval->br_startoff == mval[-1].br_startoff) { | |
3968 | /* update previous map with new information */ | |
3969 | ASSERT(mval->br_startblock == mval[-1].br_startblock); | |
3970 | ASSERT(mval->br_blockcount > mval[-1].br_blockcount); | |
3971 | ASSERT(mval->br_state == mval[-1].br_state); | |
3972 | mval[-1].br_blockcount = mval->br_blockcount; | |
3973 | mval[-1].br_state = mval->br_state; | |
3974 | } else if (*n > 0 && mval->br_startblock != DELAYSTARTBLOCK && | |
3975 | mval[-1].br_startblock != DELAYSTARTBLOCK && | |
3976 | mval[-1].br_startblock != HOLESTARTBLOCK && | |
3977 | mval->br_startblock == mval[-1].br_startblock + | |
3978 | mval[-1].br_blockcount && | |
3979 | ((flags & XFS_BMAPI_IGSTATE) || | |
3980 | mval[-1].br_state == mval->br_state)) { | |
3981 | ASSERT(mval->br_startoff == | |
3982 | mval[-1].br_startoff + mval[-1].br_blockcount); | |
3983 | mval[-1].br_blockcount += mval->br_blockcount; | |
3984 | } else if (*n > 0 && | |
3985 | mval->br_startblock == DELAYSTARTBLOCK && | |
3986 | mval[-1].br_startblock == DELAYSTARTBLOCK && | |
3987 | mval->br_startoff == | |
3988 | mval[-1].br_startoff + mval[-1].br_blockcount) { | |
3989 | mval[-1].br_blockcount += mval->br_blockcount; | |
3990 | mval[-1].br_state = mval->br_state; | |
3991 | } else if (!((*n == 0) && | |
3992 | ((mval->br_startoff + mval->br_blockcount) <= | |
3993 | obno))) { | |
3994 | mval++; | |
3995 | (*n)++; | |
3996 | } | |
3997 | *map = mval; | |
e04426b9 DC |
3998 | } |
3999 | ||
4000 | /* | |
9e5987a7 | 4001 | * Map file blocks to filesystem blocks without allocation. |
e04426b9 DC |
4002 | */ |
4003 | int | |
9e5987a7 DC |
4004 | xfs_bmapi_read( |
4005 | struct xfs_inode *ip, | |
4006 | xfs_fileoff_t bno, | |
b447fe5a | 4007 | xfs_filblks_t len, |
9e5987a7 DC |
4008 | struct xfs_bmbt_irec *mval, |
4009 | int *nmap, | |
c315c90b | 4010 | int flags) |
b447fe5a | 4011 | { |
9e5987a7 DC |
4012 | struct xfs_mount *mp = ip->i_mount; |
4013 | struct xfs_ifork *ifp; | |
4014 | struct xfs_bmbt_irec got; | |
4015 | struct xfs_bmbt_irec prev; | |
4016 | xfs_fileoff_t obno; | |
4017 | xfs_fileoff_t end; | |
4018 | xfs_extnum_t lastx; | |
4019 | int error; | |
4020 | int eof; | |
4021 | int n = 0; | |
b447fe5a DC |
4022 | int whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
4023 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
b447fe5a | 4024 | |
9e5987a7 DC |
4025 | ASSERT(*nmap >= 1); |
4026 | ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK|XFS_BMAPI_ENTIRE| | |
4027 | XFS_BMAPI_IGSTATE))); | |
eef334e5 | 4028 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED|XFS_ILOCK_EXCL)); |
b447fe5a | 4029 | |
9e5987a7 DC |
4030 | if (unlikely(XFS_TEST_ERROR( |
4031 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
4032 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
4033 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
4034 | XFS_ERROR_REPORT("xfs_bmapi_read", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 4035 | return -EFSCORRUPTED; |
9e5987a7 | 4036 | } |
b447fe5a | 4037 | |
9e5987a7 | 4038 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4039 | return -EIO; |
9e5987a7 DC |
4040 | |
4041 | XFS_STATS_INC(xs_blk_mapr); | |
4042 | ||
4043 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4044 | ||
4045 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
4046 | error = xfs_iread_extents(NULL, ip, whichfork); | |
4047 | if (error) | |
4048 | return error; | |
b447fe5a | 4049 | } |
b447fe5a | 4050 | |
9e5987a7 DC |
4051 | xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, &prev); |
4052 | end = bno + len; | |
4053 | obno = bno; | |
b447fe5a | 4054 | |
9e5987a7 DC |
4055 | while (bno < end && n < *nmap) { |
4056 | /* Reading past eof, act as though there's a hole up to end. */ | |
4057 | if (eof) | |
4058 | got.br_startoff = end; | |
4059 | if (got.br_startoff > bno) { | |
4060 | /* Reading in a hole. */ | |
4061 | mval->br_startoff = bno; | |
4062 | mval->br_startblock = HOLESTARTBLOCK; | |
4063 | mval->br_blockcount = | |
4064 | XFS_FILBLKS_MIN(len, got.br_startoff - bno); | |
4065 | mval->br_state = XFS_EXT_NORM; | |
4066 | bno += mval->br_blockcount; | |
4067 | len -= mval->br_blockcount; | |
4068 | mval++; | |
4069 | n++; | |
4070 | continue; | |
4071 | } | |
b447fe5a | 4072 | |
9e5987a7 DC |
4073 | /* set up the extent map to return. */ |
4074 | xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); | |
4075 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); | |
4076 | ||
4077 | /* If we're done, stop now. */ | |
4078 | if (bno >= end || n >= *nmap) | |
4079 | break; | |
4080 | ||
4081 | /* Else go on to the next record. */ | |
4082 | if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) | |
4083 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got); | |
4084 | else | |
4085 | eof = 1; | |
4086 | } | |
4087 | *nmap = n; | |
b447fe5a DC |
4088 | return 0; |
4089 | } | |
4090 | ||
9e5987a7 DC |
4091 | STATIC int |
4092 | xfs_bmapi_reserve_delalloc( | |
4093 | struct xfs_inode *ip, | |
4094 | xfs_fileoff_t aoff, | |
4095 | xfs_filblks_t len, | |
4096 | struct xfs_bmbt_irec *got, | |
4097 | struct xfs_bmbt_irec *prev, | |
4098 | xfs_extnum_t *lastx, | |
4099 | int eof) | |
1da177e4 | 4100 | { |
c0dc7828 | 4101 | struct xfs_mount *mp = ip->i_mount; |
9e5987a7 DC |
4102 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
4103 | xfs_extlen_t alen; | |
4104 | xfs_extlen_t indlen; | |
4105 | char rt = XFS_IS_REALTIME_INODE(ip); | |
4106 | xfs_extlen_t extsz; | |
4107 | int error; | |
c0dc7828 | 4108 | |
9e5987a7 DC |
4109 | alen = XFS_FILBLKS_MIN(len, MAXEXTLEN); |
4110 | if (!eof) | |
4111 | alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff); | |
1da177e4 | 4112 | |
9e5987a7 DC |
4113 | /* Figure out the extent size, adjust alen */ |
4114 | extsz = xfs_get_extsz_hint(ip); | |
4115 | if (extsz) { | |
9e5987a7 DC |
4116 | error = xfs_bmap_extsize_align(mp, got, prev, extsz, rt, eof, |
4117 | 1, 0, &aoff, &alen); | |
4118 | ASSERT(!error); | |
4119 | } | |
4120 | ||
4121 | if (rt) | |
4122 | extsz = alen / mp->m_sb.sb_rextsize; | |
4123 | ||
4124 | /* | |
4125 | * Make a transaction-less quota reservation for delayed allocation | |
4126 | * blocks. This number gets adjusted later. We return if we haven't | |
4127 | * allocated blocks already inside this loop. | |
4128 | */ | |
4129 | error = xfs_trans_reserve_quota_nblks(NULL, ip, (long)alen, 0, | |
4130 | rt ? XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); | |
4131 | if (error) | |
4132 | return error; | |
4133 | ||
4134 | /* | |
4135 | * Split changing sb for alen and indlen since they could be coming | |
4136 | * from different places. | |
4137 | */ | |
4138 | indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen); | |
4139 | ASSERT(indlen > 0); | |
4140 | ||
4141 | if (rt) { | |
bab98bbe | 4142 | error = xfs_mod_frextents(mp, -((int64_t)extsz)); |
9e5987a7 | 4143 | } else { |
0d485ada | 4144 | error = xfs_mod_fdblocks(mp, -((int64_t)alen), false); |
9e5987a7 DC |
4145 | } |
4146 | ||
4147 | if (error) | |
4148 | goto out_unreserve_quota; | |
4149 | ||
0d485ada | 4150 | error = xfs_mod_fdblocks(mp, -((int64_t)indlen), false); |
9e5987a7 DC |
4151 | if (error) |
4152 | goto out_unreserve_blocks; | |
4153 | ||
4154 | ||
4155 | ip->i_delayed_blks += alen; | |
4156 | ||
4157 | got->br_startoff = aoff; | |
4158 | got->br_startblock = nullstartblock(indlen); | |
4159 | got->br_blockcount = alen; | |
4160 | got->br_state = XFS_EXT_NORM; | |
4161 | xfs_bmap_add_extent_hole_delay(ip, lastx, got); | |
4162 | ||
4163 | /* | |
4164 | * Update our extent pointer, given that xfs_bmap_add_extent_hole_delay | |
4165 | * might have merged it into one of the neighbouring ones. | |
4166 | */ | |
4167 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *lastx), got); | |
4168 | ||
4169 | ASSERT(got->br_startoff <= aoff); | |
4170 | ASSERT(got->br_startoff + got->br_blockcount >= aoff + alen); | |
4171 | ASSERT(isnullstartblock(got->br_startblock)); | |
4172 | ASSERT(got->br_state == XFS_EXT_NORM); | |
4173 | return 0; | |
4174 | ||
4175 | out_unreserve_blocks: | |
4176 | if (rt) | |
bab98bbe | 4177 | xfs_mod_frextents(mp, extsz); |
9e5987a7 | 4178 | else |
0d485ada | 4179 | xfs_mod_fdblocks(mp, alen, false); |
9e5987a7 DC |
4180 | out_unreserve_quota: |
4181 | if (XFS_IS_QUOTA_ON(mp)) | |
4182 | xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ? | |
4183 | XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS); | |
4184 | return error; | |
4185 | } | |
4186 | ||
4187 | /* | |
4188 | * Map file blocks to filesystem blocks, adding delayed allocations as needed. | |
4189 | */ | |
4190 | int | |
4191 | xfs_bmapi_delay( | |
4192 | struct xfs_inode *ip, /* incore inode */ | |
4193 | xfs_fileoff_t bno, /* starting file offs. mapped */ | |
4194 | xfs_filblks_t len, /* length to map in file */ | |
4195 | struct xfs_bmbt_irec *mval, /* output: map values */ | |
4196 | int *nmap, /* i/o: mval size/count */ | |
4197 | int flags) /* XFS_BMAPI_... */ | |
4198 | { | |
4199 | struct xfs_mount *mp = ip->i_mount; | |
4200 | struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
4201 | struct xfs_bmbt_irec got; /* current file extent record */ | |
4202 | struct xfs_bmbt_irec prev; /* previous file extent record */ | |
4203 | xfs_fileoff_t obno; /* old block number (offset) */ | |
4204 | xfs_fileoff_t end; /* end of mapped file region */ | |
4205 | xfs_extnum_t lastx; /* last useful extent number */ | |
4206 | int eof; /* we've hit the end of extents */ | |
4207 | int n = 0; /* current extent index */ | |
4208 | int error = 0; | |
c0dc7828 | 4209 | |
1da177e4 | 4210 | ASSERT(*nmap >= 1); |
c0dc7828 | 4211 | ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); |
9e5987a7 | 4212 | ASSERT(!(flags & ~XFS_BMAPI_ENTIRE)); |
eef334e5 | 4213 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
c0dc7828 | 4214 | |
1da177e4 | 4215 | if (unlikely(XFS_TEST_ERROR( |
9e5987a7 DC |
4216 | (XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_EXTENTS && |
4217 | XFS_IFORK_FORMAT(ip, XFS_DATA_FORK) != XFS_DINODE_FMT_BTREE), | |
1da177e4 | 4218 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { |
9e5987a7 | 4219 | XFS_ERROR_REPORT("xfs_bmapi_delay", XFS_ERRLEVEL_LOW, mp); |
2451337d | 4220 | return -EFSCORRUPTED; |
1da177e4 | 4221 | } |
c0dc7828 | 4222 | |
1da177e4 | 4223 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4224 | return -EIO; |
c0dc7828 | 4225 | |
c0dc7828 DC |
4226 | XFS_STATS_INC(xs_blk_mapw); |
4227 | ||
c0dc7828 | 4228 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { |
9e5987a7 | 4229 | error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK); |
c0dc7828 | 4230 | if (error) |
9e5987a7 | 4231 | return error; |
c0dc7828 DC |
4232 | } |
4233 | ||
9e5987a7 | 4234 | xfs_bmap_search_extents(ip, bno, XFS_DATA_FORK, &eof, &lastx, &got, &prev); |
1da177e4 LT |
4235 | end = bno + len; |
4236 | obno = bno; | |
7e47a4ef | 4237 | |
1da177e4 | 4238 | while (bno < end && n < *nmap) { |
9e5987a7 DC |
4239 | if (eof || got.br_startoff > bno) { |
4240 | error = xfs_bmapi_reserve_delalloc(ip, bno, len, &got, | |
4241 | &prev, &lastx, eof); | |
4242 | if (error) { | |
4243 | if (n == 0) { | |
4244 | *nmap = 0; | |
4245 | return error; | |
4246 | } | |
4247 | break; | |
4248 | } | |
4249 | } | |
c0dc7828 | 4250 | |
9e5987a7 DC |
4251 | /* set up the extent map to return. */ |
4252 | xfs_bmapi_trim_map(mval, &got, &bno, len, obno, end, n, flags); | |
aef9a895 DC |
4253 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); |
4254 | ||
9e5987a7 DC |
4255 | /* If we're done, stop now. */ |
4256 | if (bno >= end || n >= *nmap) | |
1da177e4 | 4257 | break; |
c0dc7828 DC |
4258 | |
4259 | /* Else go on to the next record. */ | |
9e5987a7 DC |
4260 | prev = got; |
4261 | if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) | |
4262 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got); | |
4263 | else | |
5690f921 | 4264 | eof = 1; |
1da177e4 | 4265 | } |
9e5987a7 | 4266 | |
1da177e4 | 4267 | *nmap = n; |
9e5987a7 DC |
4268 | return 0; |
4269 | } | |
c0dc7828 | 4270 | |
c315c90b | 4271 | |
cf11da9c DC |
4272 | static int |
4273 | xfs_bmapi_allocate( | |
9e5987a7 DC |
4274 | struct xfs_bmalloca *bma) |
4275 | { | |
4276 | struct xfs_mount *mp = bma->ip->i_mount; | |
4277 | int whichfork = (bma->flags & XFS_BMAPI_ATTRFORK) ? | |
4278 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
4279 | struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); | |
4280 | int tmp_logflags = 0; | |
4281 | int error; | |
9e5987a7 DC |
4282 | |
4283 | ASSERT(bma->length > 0); | |
4284 | ||
1da177e4 | 4285 | /* |
9e5987a7 DC |
4286 | * For the wasdelay case, we could also just allocate the stuff asked |
4287 | * for in this bmap call but that wouldn't be as good. | |
1da177e4 | 4288 | */ |
9e5987a7 DC |
4289 | if (bma->wasdel) { |
4290 | bma->length = (xfs_extlen_t)bma->got.br_blockcount; | |
4291 | bma->offset = bma->got.br_startoff; | |
4292 | if (bma->idx != NULLEXTNUM && bma->idx) { | |
4293 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx - 1), | |
4294 | &bma->prev); | |
1da177e4 | 4295 | } |
9e5987a7 DC |
4296 | } else { |
4297 | bma->length = XFS_FILBLKS_MIN(bma->length, MAXEXTLEN); | |
4298 | if (!bma->eof) | |
4299 | bma->length = XFS_FILBLKS_MIN(bma->length, | |
4300 | bma->got.br_startoff - bma->offset); | |
1da177e4 | 4301 | } |
1da177e4 | 4302 | |
9e5987a7 DC |
4303 | /* |
4304 | * Indicate if this is the first user data in the file, or just any | |
4305 | * user data. | |
4306 | */ | |
4307 | if (!(bma->flags & XFS_BMAPI_METADATA)) { | |
4308 | bma->userdata = (bma->offset == 0) ? | |
4309 | XFS_ALLOC_INITIAL_USER_DATA : XFS_ALLOC_USERDATA; | |
4310 | } | |
1da177e4 | 4311 | |
9e5987a7 | 4312 | bma->minlen = (bma->flags & XFS_BMAPI_CONTIG) ? bma->length : 1; |
0b1b213f | 4313 | |
9e5987a7 DC |
4314 | /* |
4315 | * Only want to do the alignment at the eof if it is userdata and | |
4316 | * allocation length is larger than a stripe unit. | |
4317 | */ | |
4318 | if (mp->m_dalign && bma->length >= mp->m_dalign && | |
4319 | !(bma->flags & XFS_BMAPI_METADATA) && whichfork == XFS_DATA_FORK) { | |
4320 | error = xfs_bmap_isaeof(bma, whichfork); | |
4321 | if (error) | |
4322 | return error; | |
1da177e4 | 4323 | } |
8096b1eb | 4324 | |
9e5987a7 DC |
4325 | error = xfs_bmap_alloc(bma); |
4326 | if (error) | |
1da177e4 | 4327 | return error; |
9e5987a7 DC |
4328 | |
4329 | if (bma->flist->xbf_low) | |
4330 | bma->minleft = 0; | |
4331 | if (bma->cur) | |
4332 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
4333 | if (bma->blkno == NULLFSBLOCK) | |
1da177e4 | 4334 | return 0; |
9e5987a7 DC |
4335 | if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { |
4336 | bma->cur = xfs_bmbt_init_cursor(mp, bma->tp, bma->ip, whichfork); | |
4337 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
4338 | bma->cur->bc_private.b.flist = bma->flist; | |
1da177e4 | 4339 | } |
9e5987a7 DC |
4340 | /* |
4341 | * Bump the number of extents we've allocated | |
4342 | * in this call. | |
4343 | */ | |
4344 | bma->nallocs++; | |
4345 | ||
4346 | if (bma->cur) | |
4347 | bma->cur->bc_private.b.flags = | |
4348 | bma->wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; | |
4349 | ||
4350 | bma->got.br_startoff = bma->offset; | |
4351 | bma->got.br_startblock = bma->blkno; | |
4352 | bma->got.br_blockcount = bma->length; | |
4353 | bma->got.br_state = XFS_EXT_NORM; | |
b4e9181e | 4354 | |
1da177e4 | 4355 | /* |
9e5987a7 DC |
4356 | * A wasdelay extent has been initialized, so shouldn't be flagged |
4357 | * as unwritten. | |
1da177e4 | 4358 | */ |
9e5987a7 DC |
4359 | if (!bma->wasdel && (bma->flags & XFS_BMAPI_PREALLOC) && |
4360 | xfs_sb_version_hasextflgbit(&mp->m_sb)) | |
4361 | bma->got.br_state = XFS_EXT_UNWRITTEN; | |
4362 | ||
4363 | if (bma->wasdel) | |
4364 | error = xfs_bmap_add_extent_delay_real(bma); | |
4365 | else | |
4366 | error = xfs_bmap_add_extent_hole_real(bma, whichfork); | |
4367 | ||
4368 | bma->logflags |= tmp_logflags; | |
4369 | if (error) | |
4370 | return error; | |
4371 | ||
4372 | /* | |
4373 | * Update our extent pointer, given that xfs_bmap_add_extent_delay_real | |
4374 | * or xfs_bmap_add_extent_hole_real might have merged it into one of | |
4375 | * the neighbouring ones. | |
4376 | */ | |
4377 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); | |
4378 | ||
4379 | ASSERT(bma->got.br_startoff <= bma->offset); | |
4380 | ASSERT(bma->got.br_startoff + bma->got.br_blockcount >= | |
4381 | bma->offset + bma->length); | |
4382 | ASSERT(bma->got.br_state == XFS_EXT_NORM || | |
4383 | bma->got.br_state == XFS_EXT_UNWRITTEN); | |
4384 | return 0; | |
4385 | } | |
4386 | ||
9e5987a7 DC |
4387 | STATIC int |
4388 | xfs_bmapi_convert_unwritten( | |
4389 | struct xfs_bmalloca *bma, | |
4390 | struct xfs_bmbt_irec *mval, | |
4391 | xfs_filblks_t len, | |
4392 | int flags) | |
4393 | { | |
4394 | int whichfork = (flags & XFS_BMAPI_ATTRFORK) ? | |
4395 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
4396 | struct xfs_ifork *ifp = XFS_IFORK_PTR(bma->ip, whichfork); | |
4397 | int tmp_logflags = 0; | |
4398 | int error; | |
4399 | ||
4400 | /* check if we need to do unwritten->real conversion */ | |
4401 | if (mval->br_state == XFS_EXT_UNWRITTEN && | |
4402 | (flags & XFS_BMAPI_PREALLOC)) | |
4403 | return 0; | |
4404 | ||
4405 | /* check if we need to do real->unwritten conversion */ | |
4406 | if (mval->br_state == XFS_EXT_NORM && | |
4407 | (flags & (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) != | |
4408 | (XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT)) | |
4409 | return 0; | |
4410 | ||
4411 | /* | |
4412 | * Modify (by adding) the state flag, if writing. | |
4413 | */ | |
4414 | ASSERT(mval->br_blockcount <= len); | |
4415 | if ((ifp->if_flags & XFS_IFBROOT) && !bma->cur) { | |
4416 | bma->cur = xfs_bmbt_init_cursor(bma->ip->i_mount, bma->tp, | |
4417 | bma->ip, whichfork); | |
4418 | bma->cur->bc_private.b.firstblock = *bma->firstblock; | |
4419 | bma->cur->bc_private.b.flist = bma->flist; | |
1da177e4 | 4420 | } |
9e5987a7 DC |
4421 | mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN) |
4422 | ? XFS_EXT_NORM : XFS_EXT_UNWRITTEN; | |
5575acc7 | 4423 | |
9e5987a7 DC |
4424 | error = xfs_bmap_add_extent_unwritten_real(bma->tp, bma->ip, &bma->idx, |
4425 | &bma->cur, mval, bma->firstblock, bma->flist, | |
4426 | &tmp_logflags); | |
4427 | bma->logflags |= tmp_logflags; | |
4428 | if (error) | |
4429 | return error; | |
4430 | ||
4431 | /* | |
4432 | * Update our extent pointer, given that | |
4433 | * xfs_bmap_add_extent_unwritten_real might have merged it into one | |
4434 | * of the neighbouring ones. | |
4435 | */ | |
4436 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &bma->got); | |
4437 | ||
4438 | /* | |
4439 | * We may have combined previously unwritten space with written space, | |
4440 | * so generate another request. | |
4441 | */ | |
4442 | if (mval->br_blockcount < len) | |
2451337d | 4443 | return -EAGAIN; |
9e5987a7 DC |
4444 | return 0; |
4445 | } | |
4446 | ||
4447 | /* | |
4448 | * Map file blocks to filesystem blocks, and allocate blocks or convert the | |
4449 | * extent state if necessary. Details behaviour is controlled by the flags | |
4450 | * parameter. Only allocates blocks from a single allocation group, to avoid | |
4451 | * locking problems. | |
4452 | * | |
4453 | * The returned value in "firstblock" from the first call in a transaction | |
4454 | * must be remembered and presented to subsequent calls in "firstblock". | |
4455 | * An upper bound for the number of blocks to be allocated is supplied to | |
4456 | * the first call in "total"; if no allocation group has that many free | |
4457 | * blocks then the call will fail (return NULLFSBLOCK in "firstblock"). | |
4458 | */ | |
4459 | int | |
4460 | xfs_bmapi_write( | |
4461 | struct xfs_trans *tp, /* transaction pointer */ | |
4462 | struct xfs_inode *ip, /* incore inode */ | |
4463 | xfs_fileoff_t bno, /* starting file offs. mapped */ | |
4464 | xfs_filblks_t len, /* length to map in file */ | |
4465 | int flags, /* XFS_BMAPI_... */ | |
4466 | xfs_fsblock_t *firstblock, /* first allocated block | |
4467 | controls a.g. for allocs */ | |
4468 | xfs_extlen_t total, /* total blocks needed */ | |
4469 | struct xfs_bmbt_irec *mval, /* output: map values */ | |
4470 | int *nmap, /* i/o: mval size/count */ | |
4471 | struct xfs_bmap_free *flist) /* i/o: list extents to free */ | |
4472 | { | |
4473 | struct xfs_mount *mp = ip->i_mount; | |
4474 | struct xfs_ifork *ifp; | |
a30b0367 | 4475 | struct xfs_bmalloca bma = { NULL }; /* args for xfs_bmap_alloc */ |
9e5987a7 DC |
4476 | xfs_fileoff_t end; /* end of mapped file region */ |
4477 | int eof; /* after the end of extents */ | |
4478 | int error; /* error return */ | |
4479 | int n; /* current extent index */ | |
4480 | xfs_fileoff_t obno; /* old block number (offset) */ | |
4481 | int whichfork; /* data or attr fork */ | |
4482 | char inhole; /* current location is hole in file */ | |
4483 | char wasdelay; /* old extent was delayed */ | |
4484 | ||
4485 | #ifdef DEBUG | |
4486 | xfs_fileoff_t orig_bno; /* original block number value */ | |
4487 | int orig_flags; /* original flags arg value */ | |
4488 | xfs_filblks_t orig_len; /* original value of len arg */ | |
4489 | struct xfs_bmbt_irec *orig_mval; /* original value of mval */ | |
4490 | int orig_nmap; /* original value of *nmap */ | |
4491 | ||
4492 | orig_bno = bno; | |
4493 | orig_len = len; | |
4494 | orig_flags = flags; | |
4495 | orig_mval = mval; | |
4496 | orig_nmap = *nmap; | |
4497 | #endif | |
f3508bcd DC |
4498 | whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
4499 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
9e5987a7 DC |
4500 | |
4501 | ASSERT(*nmap >= 1); | |
4502 | ASSERT(*nmap <= XFS_BMAP_MAX_NMAP); | |
4503 | ASSERT(!(flags & XFS_BMAPI_IGSTATE)); | |
4504 | ASSERT(tp != NULL); | |
4505 | ASSERT(len > 0); | |
f3508bcd | 4506 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL); |
eef334e5 | 4507 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
9e5987a7 DC |
4508 | |
4509 | if (unlikely(XFS_TEST_ERROR( | |
4510 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
f3508bcd | 4511 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), |
9e5987a7 DC |
4512 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { |
4513 | XFS_ERROR_REPORT("xfs_bmapi_write", XFS_ERRLEVEL_LOW, mp); | |
2451337d | 4514 | return -EFSCORRUPTED; |
5575acc7 KD |
4515 | } |
4516 | ||
9e5987a7 | 4517 | if (XFS_FORCED_SHUTDOWN(mp)) |
2451337d | 4518 | return -EIO; |
9e5987a7 DC |
4519 | |
4520 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4521 | ||
4522 | XFS_STATS_INC(xs_blk_mapw); | |
4523 | ||
9e5987a7 DC |
4524 | if (*firstblock == NULLFSBLOCK) { |
4525 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE) | |
4526 | bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1; | |
4527 | else | |
4528 | bma.minleft = 1; | |
4529 | } else { | |
4530 | bma.minleft = 0; | |
4531 | } | |
4532 | ||
4533 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
4534 | error = xfs_iread_extents(tp, ip, whichfork); | |
4535 | if (error) | |
4536 | goto error0; | |
4537 | } | |
4538 | ||
4539 | xfs_bmap_search_extents(ip, bno, whichfork, &eof, &bma.idx, &bma.got, | |
4540 | &bma.prev); | |
4541 | n = 0; | |
4542 | end = bno + len; | |
4543 | obno = bno; | |
4544 | ||
4545 | bma.tp = tp; | |
4546 | bma.ip = ip; | |
4547 | bma.total = total; | |
4548 | bma.userdata = 0; | |
4549 | bma.flist = flist; | |
4550 | bma.firstblock = firstblock; | |
4551 | ||
9e5987a7 DC |
4552 | while (bno < end && n < *nmap) { |
4553 | inhole = eof || bma.got.br_startoff > bno; | |
4554 | wasdelay = !inhole && isnullstartblock(bma.got.br_startblock); | |
4555 | ||
1da177e4 | 4556 | /* |
9e5987a7 DC |
4557 | * First, deal with the hole before the allocated space |
4558 | * that we found, if any. | |
1da177e4 | 4559 | */ |
9e5987a7 DC |
4560 | if (inhole || wasdelay) { |
4561 | bma.eof = eof; | |
4562 | bma.conv = !!(flags & XFS_BMAPI_CONVERT); | |
4563 | bma.wasdel = wasdelay; | |
4564 | bma.offset = bno; | |
4565 | bma.flags = flags; | |
4566 | ||
1da177e4 | 4567 | /* |
9e5987a7 DC |
4568 | * There's a 32/64 bit type mismatch between the |
4569 | * allocation length request (which can be 64 bits in | |
4570 | * length) and the bma length request, which is | |
4571 | * xfs_extlen_t and therefore 32 bits. Hence we have to | |
4572 | * check for 32-bit overflows and handle them here. | |
1da177e4 | 4573 | */ |
9e5987a7 DC |
4574 | if (len > (xfs_filblks_t)MAXEXTLEN) |
4575 | bma.length = MAXEXTLEN; | |
4576 | else | |
4577 | bma.length = len; | |
4578 | ||
4579 | ASSERT(len > 0); | |
4580 | ASSERT(bma.length > 0); | |
4581 | error = xfs_bmapi_allocate(&bma); | |
1da177e4 LT |
4582 | if (error) |
4583 | goto error0; | |
9e5987a7 DC |
4584 | if (bma.blkno == NULLFSBLOCK) |
4585 | break; | |
1da177e4 | 4586 | } |
9e5987a7 DC |
4587 | |
4588 | /* Deal with the allocated space we found. */ | |
4589 | xfs_bmapi_trim_map(mval, &bma.got, &bno, len, obno, | |
4590 | end, n, flags); | |
4591 | ||
4592 | /* Execute unwritten extent conversion if necessary */ | |
4593 | error = xfs_bmapi_convert_unwritten(&bma, mval, len, flags); | |
2451337d | 4594 | if (error == -EAGAIN) |
9e5987a7 DC |
4595 | continue; |
4596 | if (error) | |
4597 | goto error0; | |
4598 | ||
4599 | /* update the extent map to return */ | |
4600 | xfs_bmapi_update_map(&mval, &bno, &len, obno, end, &n, flags); | |
4601 | ||
4602 | /* | |
4603 | * If we're done, stop now. Stop when we've allocated | |
4604 | * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise | |
4605 | * the transaction may get too big. | |
4606 | */ | |
4607 | if (bno >= end || n >= *nmap || bma.nallocs >= *nmap) | |
4608 | break; | |
4609 | ||
4610 | /* Else go on to the next record. */ | |
4611 | bma.prev = bma.got; | |
4612 | if (++bma.idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) { | |
4613 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma.idx), | |
4614 | &bma.got); | |
4615 | } else | |
4616 | eof = 1; | |
4617 | } | |
4618 | *nmap = n; | |
4619 | ||
4620 | /* | |
4621 | * Transform from btree to extents, give it cur. | |
4622 | */ | |
4623 | if (xfs_bmap_wants_extents(ip, whichfork)) { | |
4624 | int tmp_logflags = 0; | |
4625 | ||
4626 | ASSERT(bma.cur); | |
4627 | error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, | |
4628 | &tmp_logflags, whichfork); | |
4629 | bma.logflags |= tmp_logflags; | |
4630 | if (error) | |
4631 | goto error0; | |
4632 | } | |
4633 | ||
4634 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE || | |
4635 | XFS_IFORK_NEXTENTS(ip, whichfork) > | |
4636 | XFS_IFORK_MAXEXT(ip, whichfork)); | |
4637 | error = 0; | |
4638 | error0: | |
4639 | /* | |
4640 | * Log everything. Do this after conversion, there's no point in | |
4641 | * logging the extent records if we've converted to btree format. | |
4642 | */ | |
4643 | if ((bma.logflags & xfs_ilog_fext(whichfork)) && | |
4644 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
4645 | bma.logflags &= ~xfs_ilog_fext(whichfork); | |
4646 | else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) && | |
4647 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) | |
4648 | bma.logflags &= ~xfs_ilog_fbroot(whichfork); | |
4649 | /* | |
4650 | * Log whatever the flags say, even if error. Otherwise we might miss | |
4651 | * detecting a case where the data is changed, there's an error, | |
4652 | * and it's not logged so we don't shutdown when we should. | |
4653 | */ | |
4654 | if (bma.logflags) | |
4655 | xfs_trans_log_inode(tp, ip, bma.logflags); | |
4656 | ||
4657 | if (bma.cur) { | |
4658 | if (!error) { | |
4659 | ASSERT(*firstblock == NULLFSBLOCK || | |
4660 | XFS_FSB_TO_AGNO(mp, *firstblock) == | |
4661 | XFS_FSB_TO_AGNO(mp, | |
4662 | bma.cur->bc_private.b.firstblock) || | |
4663 | (flist->xbf_low && | |
4664 | XFS_FSB_TO_AGNO(mp, *firstblock) < | |
4665 | XFS_FSB_TO_AGNO(mp, | |
4666 | bma.cur->bc_private.b.firstblock))); | |
4667 | *firstblock = bma.cur->bc_private.b.firstblock; | |
1da177e4 | 4668 | } |
9e5987a7 DC |
4669 | xfs_btree_del_cursor(bma.cur, |
4670 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
4671 | } | |
4672 | if (!error) | |
4673 | xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, | |
4674 | orig_nmap, *nmap); | |
4675 | return error; | |
4676 | } | |
06d10dd9 | 4677 | |
9e5987a7 DC |
4678 | /* |
4679 | * Called by xfs_bmapi to update file extent records and the btree | |
4680 | * after removing space (or undoing a delayed allocation). | |
4681 | */ | |
4682 | STATIC int /* error */ | |
4683 | xfs_bmap_del_extent( | |
4684 | xfs_inode_t *ip, /* incore inode pointer */ | |
4685 | xfs_trans_t *tp, /* current transaction pointer */ | |
4686 | xfs_extnum_t *idx, /* extent number to update/delete */ | |
4687 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
4688 | xfs_btree_cur_t *cur, /* if null, not a btree */ | |
4689 | xfs_bmbt_irec_t *del, /* data to remove from extents */ | |
4690 | int *logflagsp, /* inode logging flags */ | |
4691 | int whichfork) /* data or attr fork */ | |
4692 | { | |
4693 | xfs_filblks_t da_new; /* new delay-alloc indirect blocks */ | |
4694 | xfs_filblks_t da_old; /* old delay-alloc indirect blocks */ | |
4695 | xfs_fsblock_t del_endblock=0; /* first block past del */ | |
4696 | xfs_fileoff_t del_endoff; /* first offset past del */ | |
4697 | int delay; /* current block is delayed allocated */ | |
4698 | int do_fx; /* free extent at end of routine */ | |
4699 | xfs_bmbt_rec_host_t *ep; /* current extent entry pointer */ | |
4700 | int error; /* error return value */ | |
4701 | int flags; /* inode logging flags */ | |
4702 | xfs_bmbt_irec_t got; /* current extent entry */ | |
4703 | xfs_fileoff_t got_endoff; /* first offset past got */ | |
4704 | int i; /* temp state */ | |
4705 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
4706 | xfs_mount_t *mp; /* mount structure */ | |
4707 | xfs_filblks_t nblks; /* quota/sb block count */ | |
4708 | xfs_bmbt_irec_t new; /* new record to be inserted */ | |
4709 | /* REFERENCED */ | |
4710 | uint qfield; /* quota field to update */ | |
4711 | xfs_filblks_t temp; /* for indirect length calculations */ | |
4712 | xfs_filblks_t temp2; /* for indirect length calculations */ | |
4713 | int state = 0; | |
4714 | ||
4715 | XFS_STATS_INC(xs_del_exlist); | |
4716 | ||
4717 | if (whichfork == XFS_ATTR_FORK) | |
4718 | state |= BMAP_ATTRFORK; | |
4719 | ||
4720 | mp = ip->i_mount; | |
4721 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4722 | ASSERT((*idx >= 0) && (*idx < ifp->if_bytes / | |
4723 | (uint)sizeof(xfs_bmbt_rec_t))); | |
4724 | ASSERT(del->br_blockcount > 0); | |
4725 | ep = xfs_iext_get_ext(ifp, *idx); | |
4726 | xfs_bmbt_get_all(ep, &got); | |
4727 | ASSERT(got.br_startoff <= del->br_startoff); | |
4728 | del_endoff = del->br_startoff + del->br_blockcount; | |
4729 | got_endoff = got.br_startoff + got.br_blockcount; | |
4730 | ASSERT(got_endoff >= del_endoff); | |
4731 | delay = isnullstartblock(got.br_startblock); | |
4732 | ASSERT(isnullstartblock(del->br_startblock) == delay); | |
4733 | flags = 0; | |
4734 | qfield = 0; | |
4735 | error = 0; | |
4736 | /* | |
4737 | * If deleting a real allocation, must free up the disk space. | |
4738 | */ | |
4739 | if (!delay) { | |
4740 | flags = XFS_ILOG_CORE; | |
4741 | /* | |
4742 | * Realtime allocation. Free it and record di_nblocks update. | |
4743 | */ | |
4744 | if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { | |
4745 | xfs_fsblock_t bno; | |
4746 | xfs_filblks_t len; | |
4747 | ||
4748 | ASSERT(do_mod(del->br_blockcount, | |
4749 | mp->m_sb.sb_rextsize) == 0); | |
4750 | ASSERT(do_mod(del->br_startblock, | |
4751 | mp->m_sb.sb_rextsize) == 0); | |
4752 | bno = del->br_startblock; | |
4753 | len = del->br_blockcount; | |
4754 | do_div(bno, mp->m_sb.sb_rextsize); | |
4755 | do_div(len, mp->m_sb.sb_rextsize); | |
4756 | error = xfs_rtfree_extent(tp, bno, (xfs_extlen_t)len); | |
4757 | if (error) | |
4758 | goto done; | |
4759 | do_fx = 0; | |
4760 | nblks = len * mp->m_sb.sb_rextsize; | |
4761 | qfield = XFS_TRANS_DQ_RTBCOUNT; | |
4762 | } | |
1da177e4 | 4763 | /* |
9e5987a7 | 4764 | * Ordinary allocation. |
1da177e4 | 4765 | */ |
9e5987a7 DC |
4766 | else { |
4767 | do_fx = 1; | |
4768 | nblks = del->br_blockcount; | |
4769 | qfield = XFS_TRANS_DQ_BCOUNT; | |
1da177e4 | 4770 | } |
1da177e4 | 4771 | /* |
9e5987a7 | 4772 | * Set up del_endblock and cur for later. |
1da177e4 | 4773 | */ |
9e5987a7 DC |
4774 | del_endblock = del->br_startblock + del->br_blockcount; |
4775 | if (cur) { | |
4776 | if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
4777 | got.br_startblock, got.br_blockcount, | |
4778 | &i))) | |
4779 | goto done; | |
c29aad41 | 4780 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
1da177e4 | 4781 | } |
9e5987a7 DC |
4782 | da_old = da_new = 0; |
4783 | } else { | |
4784 | da_old = startblockval(got.br_startblock); | |
4785 | da_new = 0; | |
4786 | nblks = 0; | |
4787 | do_fx = 0; | |
1da177e4 LT |
4788 | } |
4789 | /* | |
9e5987a7 DC |
4790 | * Set flag value to use in switch statement. |
4791 | * Left-contig is 2, right-contig is 1. | |
1da177e4 | 4792 | */ |
9e5987a7 DC |
4793 | switch (((got.br_startoff == del->br_startoff) << 1) | |
4794 | (got_endoff == del_endoff)) { | |
4795 | case 3: | |
4796 | /* | |
4797 | * Matches the whole extent. Delete the entry. | |
4798 | */ | |
4799 | xfs_iext_remove(ip, *idx, 1, | |
4800 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0); | |
4801 | --*idx; | |
4802 | if (delay) | |
4803 | break; | |
4804 | ||
4805 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
4806 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
4807 | flags |= XFS_ILOG_CORE; | |
4808 | if (!cur) { | |
4809 | flags |= xfs_ilog_fext(whichfork); | |
4810 | break; | |
4811 | } | |
4812 | if ((error = xfs_btree_delete(cur, &i))) | |
4813 | goto done; | |
c29aad41 | 4814 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
4815 | break; |
4816 | ||
4817 | case 2: | |
4818 | /* | |
4819 | * Deleting the first part of the extent. | |
4820 | */ | |
4821 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4822 | xfs_bmbt_set_startoff(ep, del_endoff); | |
4823 | temp = got.br_blockcount - del->br_blockcount; | |
4824 | xfs_bmbt_set_blockcount(ep, temp); | |
4825 | if (delay) { | |
4826 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
4827 | da_old); | |
4828 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
4829 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4830 | da_new = temp; | |
4831 | break; | |
4832 | } | |
4833 | xfs_bmbt_set_startblock(ep, del_endblock); | |
4834 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4835 | if (!cur) { | |
4836 | flags |= xfs_ilog_fext(whichfork); | |
4837 | break; | |
4838 | } | |
4839 | if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock, | |
4840 | got.br_blockcount - del->br_blockcount, | |
4841 | got.br_state))) | |
4842 | goto done; | |
4843 | break; | |
4844 | ||
4845 | case 1: | |
4846 | /* | |
4847 | * Deleting the last part of the extent. | |
4848 | */ | |
4849 | temp = got.br_blockcount - del->br_blockcount; | |
4850 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4851 | xfs_bmbt_set_blockcount(ep, temp); | |
4852 | if (delay) { | |
4853 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
4854 | da_old); | |
4855 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
4856 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4857 | da_new = temp; | |
4858 | break; | |
4859 | } | |
4860 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4861 | if (!cur) { | |
4862 | flags |= xfs_ilog_fext(whichfork); | |
4863 | break; | |
4864 | } | |
4865 | if ((error = xfs_bmbt_update(cur, got.br_startoff, | |
4866 | got.br_startblock, | |
4867 | got.br_blockcount - del->br_blockcount, | |
4868 | got.br_state))) | |
4869 | goto done; | |
4870 | break; | |
4871 | ||
4872 | case 0: | |
4873 | /* | |
4874 | * Deleting the middle of the extent. | |
4875 | */ | |
4876 | temp = del->br_startoff - got.br_startoff; | |
4877 | trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_); | |
4878 | xfs_bmbt_set_blockcount(ep, temp); | |
4879 | new.br_startoff = del_endoff; | |
4880 | temp2 = got_endoff - del_endoff; | |
4881 | new.br_blockcount = temp2; | |
4882 | new.br_state = got.br_state; | |
4883 | if (!delay) { | |
4884 | new.br_startblock = del_endblock; | |
4885 | flags |= XFS_ILOG_CORE; | |
4886 | if (cur) { | |
4887 | if ((error = xfs_bmbt_update(cur, | |
4888 | got.br_startoff, | |
4889 | got.br_startblock, temp, | |
4890 | got.br_state))) | |
4891 | goto done; | |
4892 | if ((error = xfs_btree_increment(cur, 0, &i))) | |
4893 | goto done; | |
4894 | cur->bc_rec.b = new; | |
4895 | error = xfs_btree_insert(cur, &i); | |
2451337d | 4896 | if (error && error != -ENOSPC) |
9e5987a7 DC |
4897 | goto done; |
4898 | /* | |
4899 | * If get no-space back from btree insert, | |
4900 | * it tried a split, and we have a zero | |
4901 | * block reservation. | |
4902 | * Fix up our state and return the error. | |
4903 | */ | |
2451337d | 4904 | if (error == -ENOSPC) { |
9e5987a7 DC |
4905 | /* |
4906 | * Reset the cursor, don't trust | |
4907 | * it after any insert operation. | |
4908 | */ | |
4909 | if ((error = xfs_bmbt_lookup_eq(cur, | |
4910 | got.br_startoff, | |
4911 | got.br_startblock, | |
4912 | temp, &i))) | |
4913 | goto done; | |
c29aad41 ES |
4914 | XFS_WANT_CORRUPTED_GOTO(mp, |
4915 | i == 1, done); | |
9e5987a7 DC |
4916 | /* |
4917 | * Update the btree record back | |
4918 | * to the original value. | |
4919 | */ | |
4920 | if ((error = xfs_bmbt_update(cur, | |
4921 | got.br_startoff, | |
4922 | got.br_startblock, | |
4923 | got.br_blockcount, | |
4924 | got.br_state))) | |
4925 | goto done; | |
4926 | /* | |
4927 | * Reset the extent record back | |
4928 | * to the original value. | |
4929 | */ | |
4930 | xfs_bmbt_set_blockcount(ep, | |
4931 | got.br_blockcount); | |
4932 | flags = 0; | |
2451337d | 4933 | error = -ENOSPC; |
9e5987a7 DC |
4934 | goto done; |
4935 | } | |
c29aad41 | 4936 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done); |
9e5987a7 DC |
4937 | } else |
4938 | flags |= xfs_ilog_fext(whichfork); | |
4939 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
4940 | XFS_IFORK_NEXTENTS(ip, whichfork) + 1); | |
4941 | } else { | |
4942 | ASSERT(whichfork == XFS_DATA_FORK); | |
4943 | temp = xfs_bmap_worst_indlen(ip, temp); | |
4944 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
4945 | temp2 = xfs_bmap_worst_indlen(ip, temp2); | |
4946 | new.br_startblock = nullstartblock((int)temp2); | |
4947 | da_new = temp + temp2; | |
4948 | while (da_new > da_old) { | |
4949 | if (temp) { | |
4950 | temp--; | |
4951 | da_new--; | |
4952 | xfs_bmbt_set_startblock(ep, | |
4953 | nullstartblock((int)temp)); | |
4954 | } | |
4955 | if (da_new == da_old) | |
4956 | break; | |
4957 | if (temp2) { | |
4958 | temp2--; | |
4959 | da_new--; | |
4960 | new.br_startblock = | |
4961 | nullstartblock((int)temp2); | |
4962 | } | |
4963 | } | |
4964 | } | |
4965 | trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_); | |
4966 | xfs_iext_insert(ip, *idx + 1, 1, &new, state); | |
4967 | ++*idx; | |
4968 | break; | |
1da177e4 LT |
4969 | } |
4970 | /* | |
9e5987a7 | 4971 | * If we need to, add to list of extents to delete. |
1da177e4 | 4972 | */ |
9e5987a7 DC |
4973 | if (do_fx) |
4974 | xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist, | |
4975 | mp); | |
1da177e4 | 4976 | /* |
9e5987a7 | 4977 | * Adjust inode # blocks in the file. |
1da177e4 | 4978 | */ |
9e5987a7 DC |
4979 | if (nblks) |
4980 | ip->i_d.di_nblocks -= nblks; | |
1da177e4 | 4981 | /* |
9e5987a7 | 4982 | * Adjust quota data. |
1da177e4 | 4983 | */ |
9e5987a7 DC |
4984 | if (qfield) |
4985 | xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks); | |
4986 | ||
4987 | /* | |
4988 | * Account for change in delayed indirect blocks. | |
4989 | * Nothing to do for disk quota accounting here. | |
4990 | */ | |
4991 | ASSERT(da_old >= da_new); | |
0d485ada DC |
4992 | if (da_old > da_new) |
4993 | xfs_mod_fdblocks(mp, (int64_t)(da_old - da_new), false); | |
9e5987a7 DC |
4994 | done: |
4995 | *logflagsp = flags; | |
1da177e4 LT |
4996 | return error; |
4997 | } | |
4998 | ||
3bacbcd8 | 4999 | /* |
9e5987a7 DC |
5000 | * Unmap (remove) blocks from a file. |
5001 | * If nexts is nonzero then the number of extents to remove is limited to | |
5002 | * that value. If not all extents in the block range can be removed then | |
5003 | * *done is set. | |
3bacbcd8 | 5004 | */ |
9e5987a7 DC |
5005 | int /* error */ |
5006 | xfs_bunmapi( | |
5007 | xfs_trans_t *tp, /* transaction pointer */ | |
5008 | struct xfs_inode *ip, /* incore inode */ | |
5009 | xfs_fileoff_t bno, /* starting offset to unmap */ | |
5010 | xfs_filblks_t len, /* length to unmap in file */ | |
5011 | int flags, /* misc flags */ | |
5012 | xfs_extnum_t nexts, /* number of extents max */ | |
5013 | xfs_fsblock_t *firstblock, /* first allocated block | |
5014 | controls a.g. for allocs */ | |
5015 | xfs_bmap_free_t *flist, /* i/o: list extents to free */ | |
5016 | int *done) /* set if not done yet */ | |
3bacbcd8 | 5017 | { |
9e5987a7 DC |
5018 | xfs_btree_cur_t *cur; /* bmap btree cursor */ |
5019 | xfs_bmbt_irec_t del; /* extent being deleted */ | |
5020 | int eof; /* is deleting at eof */ | |
5021 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ | |
5022 | int error; /* error return value */ | |
5023 | xfs_extnum_t extno; /* extent number in list */ | |
5024 | xfs_bmbt_irec_t got; /* current extent record */ | |
5af317c9 | 5025 | xfs_ifork_t *ifp; /* inode fork pointer */ |
9e5987a7 DC |
5026 | int isrt; /* freeing in rt area */ |
5027 | xfs_extnum_t lastx; /* last extent index used */ | |
5028 | int logflags; /* transaction logging flags */ | |
5029 | xfs_extlen_t mod; /* rt extent offset */ | |
5030 | xfs_mount_t *mp; /* mount structure */ | |
5031 | xfs_extnum_t nextents; /* number of file extents */ | |
5032 | xfs_bmbt_irec_t prev; /* previous extent record */ | |
5033 | xfs_fileoff_t start; /* first file offset deleted */ | |
5034 | int tmp_logflags; /* partial logging flags */ | |
5035 | int wasdel; /* was a delayed alloc extent */ | |
5036 | int whichfork; /* data or attribute fork */ | |
5037 | xfs_fsblock_t sum; | |
1da177e4 | 5038 | |
9e5987a7 | 5039 | trace_xfs_bunmap(ip, bno, len, flags, _RET_IP_); |
1da177e4 | 5040 | |
9e5987a7 DC |
5041 | whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
5042 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
5043 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5044 | if (unlikely( | |
5045 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5046 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { | |
5047 | XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW, | |
5048 | ip->i_mount); | |
2451337d | 5049 | return -EFSCORRUPTED; |
1da177e4 | 5050 | } |
9e5987a7 DC |
5051 | mp = ip->i_mount; |
5052 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 5053 | return -EIO; |
1da177e4 | 5054 | |
eef334e5 | 5055 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
9e5987a7 DC |
5056 | ASSERT(len > 0); |
5057 | ASSERT(nexts >= 0); | |
1da177e4 | 5058 | |
9e5987a7 DC |
5059 | if (!(ifp->if_flags & XFS_IFEXTENTS) && |
5060 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
5061 | return error; | |
5062 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
5063 | if (nextents == 0) { | |
5064 | *done = 1; | |
5065 | return 0; | |
5066 | } | |
5067 | XFS_STATS_INC(xs_blk_unmap); | |
5068 | isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); | |
5069 | start = bno; | |
5070 | bno = start + len - 1; | |
5071 | ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
5072 | &prev); | |
1da177e4 | 5073 | |
9e5987a7 DC |
5074 | /* |
5075 | * Check to see if the given block number is past the end of the | |
5076 | * file, back up to the last block if so... | |
5077 | */ | |
5078 | if (eof) { | |
5079 | ep = xfs_iext_get_ext(ifp, --lastx); | |
5080 | xfs_bmbt_get_all(ep, &got); | |
5081 | bno = got.br_startoff + got.br_blockcount - 1; | |
5082 | } | |
5083 | logflags = 0; | |
5084 | if (ifp->if_flags & XFS_IFBROOT) { | |
5085 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
5086 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
5087 | cur->bc_private.b.firstblock = *firstblock; | |
5088 | cur->bc_private.b.flist = flist; | |
5089 | cur->bc_private.b.flags = 0; | |
5090 | } else | |
5091 | cur = NULL; | |
5092 | ||
5093 | if (isrt) { | |
5094 | /* | |
5095 | * Synchronize by locking the bitmap inode. | |
5096 | */ | |
5097 | xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL); | |
5098 | xfs_trans_ijoin(tp, mp->m_rbmip, XFS_ILOCK_EXCL); | |
5099 | } | |
58e20770 | 5100 | |
9e5987a7 DC |
5101 | extno = 0; |
5102 | while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 && | |
5103 | (nexts == 0 || extno < nexts)) { | |
5104 | /* | |
5105 | * Is the found extent after a hole in which bno lives? | |
5106 | * Just back up to the previous extent, if so. | |
5107 | */ | |
5108 | if (got.br_startoff > bno) { | |
5109 | if (--lastx < 0) | |
5110 | break; | |
5111 | ep = xfs_iext_get_ext(ifp, lastx); | |
5112 | xfs_bmbt_get_all(ep, &got); | |
5113 | } | |
5114 | /* | |
5115 | * Is the last block of this extent before the range | |
5116 | * we're supposed to delete? If so, we're done. | |
5117 | */ | |
5118 | bno = XFS_FILEOFF_MIN(bno, | |
5119 | got.br_startoff + got.br_blockcount - 1); | |
5120 | if (bno < start) | |
5121 | break; | |
5122 | /* | |
5123 | * Then deal with the (possibly delayed) allocated space | |
5124 | * we found. | |
5125 | */ | |
5126 | ASSERT(ep != NULL); | |
5127 | del = got; | |
5128 | wasdel = isnullstartblock(del.br_startblock); | |
5129 | if (got.br_startoff < start) { | |
5130 | del.br_startoff = start; | |
5131 | del.br_blockcount -= start - got.br_startoff; | |
5132 | if (!wasdel) | |
5133 | del.br_startblock += start - got.br_startoff; | |
5134 | } | |
5135 | if (del.br_startoff + del.br_blockcount > bno + 1) | |
5136 | del.br_blockcount = bno + 1 - del.br_startoff; | |
5137 | sum = del.br_startblock + del.br_blockcount; | |
5138 | if (isrt && | |
5139 | (mod = do_mod(sum, mp->m_sb.sb_rextsize))) { | |
58e20770 | 5140 | /* |
9e5987a7 DC |
5141 | * Realtime extent not lined up at the end. |
5142 | * The extent could have been split into written | |
5143 | * and unwritten pieces, or we could just be | |
5144 | * unmapping part of it. But we can't really | |
5145 | * get rid of part of a realtime extent. | |
58e20770 | 5146 | */ |
9e5987a7 DC |
5147 | if (del.br_state == XFS_EXT_UNWRITTEN || |
5148 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { | |
5149 | /* | |
5150 | * This piece is unwritten, or we're not | |
5151 | * using unwritten extents. Skip over it. | |
5152 | */ | |
5153 | ASSERT(bno >= mod); | |
5154 | bno -= mod > del.br_blockcount ? | |
5155 | del.br_blockcount : mod; | |
5156 | if (bno < got.br_startoff) { | |
5157 | if (--lastx >= 0) | |
5158 | xfs_bmbt_get_all(xfs_iext_get_ext( | |
5159 | ifp, lastx), &got); | |
5160 | } | |
5161 | continue; | |
1da177e4 | 5162 | } |
9af25465 | 5163 | /* |
9e5987a7 DC |
5164 | * It's written, turn it unwritten. |
5165 | * This is better than zeroing it. | |
9af25465 | 5166 | */ |
9e5987a7 DC |
5167 | ASSERT(del.br_state == XFS_EXT_NORM); |
5168 | ASSERT(xfs_trans_get_block_res(tp) > 0); | |
5169 | /* | |
5170 | * If this spans a realtime extent boundary, | |
5171 | * chop it back to the start of the one we end at. | |
5172 | */ | |
5173 | if (del.br_blockcount > mod) { | |
5174 | del.br_startoff += del.br_blockcount - mod; | |
5175 | del.br_startblock += del.br_blockcount - mod; | |
5176 | del.br_blockcount = mod; | |
5177 | } | |
5178 | del.br_state = XFS_EXT_UNWRITTEN; | |
5179 | error = xfs_bmap_add_extent_unwritten_real(tp, ip, | |
5180 | &lastx, &cur, &del, firstblock, flist, | |
5181 | &logflags); | |
5182 | if (error) | |
5183 | goto error0; | |
5184 | goto nodelete; | |
5185 | } | |
5186 | if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) { | |
5187 | /* | |
5188 | * Realtime extent is lined up at the end but not | |
5189 | * at the front. We'll get rid of full extents if | |
5190 | * we can. | |
5191 | */ | |
5192 | mod = mp->m_sb.sb_rextsize - mod; | |
5193 | if (del.br_blockcount > mod) { | |
5194 | del.br_blockcount -= mod; | |
5195 | del.br_startoff += mod; | |
5196 | del.br_startblock += mod; | |
5197 | } else if ((del.br_startoff == start && | |
5198 | (del.br_state == XFS_EXT_UNWRITTEN || | |
5199 | xfs_trans_get_block_res(tp) == 0)) || | |
5200 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { | |
5201 | /* | |
5202 | * Can't make it unwritten. There isn't | |
5203 | * a full extent here so just skip it. | |
5204 | */ | |
5205 | ASSERT(bno >= del.br_blockcount); | |
5206 | bno -= del.br_blockcount; | |
5207 | if (got.br_startoff > bno) { | |
5208 | if (--lastx >= 0) { | |
5209 | ep = xfs_iext_get_ext(ifp, | |
5210 | lastx); | |
5211 | xfs_bmbt_get_all(ep, &got); | |
5212 | } | |
5213 | } | |
9af25465 | 5214 | continue; |
9e5987a7 DC |
5215 | } else if (del.br_state == XFS_EXT_UNWRITTEN) { |
5216 | /* | |
5217 | * This one is already unwritten. | |
5218 | * It must have a written left neighbor. | |
5219 | * Unwrite the killed part of that one and | |
5220 | * try again. | |
5221 | */ | |
5222 | ASSERT(lastx > 0); | |
5223 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, | |
5224 | lastx - 1), &prev); | |
5225 | ASSERT(prev.br_state == XFS_EXT_NORM); | |
5226 | ASSERT(!isnullstartblock(prev.br_startblock)); | |
5227 | ASSERT(del.br_startblock == | |
5228 | prev.br_startblock + prev.br_blockcount); | |
5229 | if (prev.br_startoff < start) { | |
5230 | mod = start - prev.br_startoff; | |
5231 | prev.br_blockcount -= mod; | |
5232 | prev.br_startblock += mod; | |
5233 | prev.br_startoff = start; | |
5234 | } | |
5235 | prev.br_state = XFS_EXT_UNWRITTEN; | |
5236 | lastx--; | |
5237 | error = xfs_bmap_add_extent_unwritten_real(tp, | |
5238 | ip, &lastx, &cur, &prev, | |
5239 | firstblock, flist, &logflags); | |
5240 | if (error) | |
5241 | goto error0; | |
5242 | goto nodelete; | |
5243 | } else { | |
5244 | ASSERT(del.br_state == XFS_EXT_NORM); | |
5245 | del.br_state = XFS_EXT_UNWRITTEN; | |
5246 | error = xfs_bmap_add_extent_unwritten_real(tp, | |
5247 | ip, &lastx, &cur, &del, | |
5248 | firstblock, flist, &logflags); | |
5249 | if (error) | |
5250 | goto error0; | |
5251 | goto nodelete; | |
9af25465 | 5252 | } |
1da177e4 | 5253 | } |
9e5987a7 DC |
5254 | if (wasdel) { |
5255 | ASSERT(startblockval(del.br_startblock) > 0); | |
5256 | /* Update realtime/data freespace, unreserve quota */ | |
5257 | if (isrt) { | |
5258 | xfs_filblks_t rtexts; | |
1da177e4 | 5259 | |
9e5987a7 DC |
5260 | rtexts = XFS_FSB_TO_B(mp, del.br_blockcount); |
5261 | do_div(rtexts, mp->m_sb.sb_rextsize); | |
bab98bbe | 5262 | xfs_mod_frextents(mp, (int64_t)rtexts); |
9e5987a7 DC |
5263 | (void)xfs_trans_reserve_quota_nblks(NULL, |
5264 | ip, -((long)del.br_blockcount), 0, | |
5265 | XFS_QMOPT_RES_RTBLKS); | |
5266 | } else { | |
0d485ada DC |
5267 | xfs_mod_fdblocks(mp, (int64_t)del.br_blockcount, |
5268 | false); | |
9e5987a7 DC |
5269 | (void)xfs_trans_reserve_quota_nblks(NULL, |
5270 | ip, -((long)del.br_blockcount), 0, | |
5271 | XFS_QMOPT_RES_REGBLKS); | |
5272 | } | |
5273 | ip->i_delayed_blks -= del.br_blockcount; | |
5274 | if (cur) | |
5275 | cur->bc_private.b.flags |= | |
5276 | XFS_BTCUR_BPRV_WASDEL; | |
5277 | } else if (cur) | |
5278 | cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL; | |
5279 | /* | |
5280 | * If it's the case where the directory code is running | |
5281 | * with no block reservation, and the deleted block is in | |
5282 | * the middle of its extent, and the resulting insert | |
5283 | * of an extent would cause transformation to btree format, | |
5284 | * then reject it. The calling code will then swap | |
5285 | * blocks around instead. | |
5286 | * We have to do this now, rather than waiting for the | |
5287 | * conversion to btree format, since the transaction | |
5288 | * will be dirty. | |
5289 | */ | |
5290 | if (!wasdel && xfs_trans_get_block_res(tp) == 0 && | |
5291 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && | |
5292 | XFS_IFORK_NEXTENTS(ip, whichfork) >= /* Note the >= */ | |
5293 | XFS_IFORK_MAXEXT(ip, whichfork) && | |
5294 | del.br_startoff > got.br_startoff && | |
5295 | del.br_startoff + del.br_blockcount < | |
5296 | got.br_startoff + got.br_blockcount) { | |
2451337d | 5297 | error = -ENOSPC; |
9e5987a7 | 5298 | goto error0; |
1da177e4 | 5299 | } |
9e5987a7 DC |
5300 | error = xfs_bmap_del_extent(ip, tp, &lastx, flist, cur, &del, |
5301 | &tmp_logflags, whichfork); | |
5302 | logflags |= tmp_logflags; | |
5303 | if (error) | |
5304 | goto error0; | |
5305 | bno = del.br_startoff - 1; | |
5306 | nodelete: | |
1da177e4 | 5307 | /* |
9e5987a7 | 5308 | * If not done go on to the next (previous) record. |
1da177e4 | 5309 | */ |
9e5987a7 DC |
5310 | if (bno != (xfs_fileoff_t)-1 && bno >= start) { |
5311 | if (lastx >= 0) { | |
5312 | ep = xfs_iext_get_ext(ifp, lastx); | |
5313 | if (xfs_bmbt_get_startoff(ep) > bno) { | |
5314 | if (--lastx >= 0) | |
5315 | ep = xfs_iext_get_ext(ifp, | |
5316 | lastx); | |
5317 | } | |
5318 | xfs_bmbt_get_all(ep, &got); | |
1da177e4 | 5319 | } |
9e5987a7 | 5320 | extno++; |
1da177e4 LT |
5321 | } |
5322 | } | |
9e5987a7 | 5323 | *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0; |
576039cf | 5324 | |
1da177e4 | 5325 | /* |
9e5987a7 | 5326 | * Convert to a btree if necessary. |
1da177e4 | 5327 | */ |
9e5987a7 DC |
5328 | if (xfs_bmap_needs_btree(ip, whichfork)) { |
5329 | ASSERT(cur == NULL); | |
5330 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, | |
5331 | &cur, 0, &tmp_logflags, whichfork); | |
5332 | logflags |= tmp_logflags; | |
5333 | if (error) | |
5334 | goto error0; | |
1da177e4 | 5335 | } |
1da177e4 | 5336 | /* |
9e5987a7 | 5337 | * transform from btree to extents, give it cur |
1da177e4 | 5338 | */ |
9e5987a7 DC |
5339 | else if (xfs_bmap_wants_extents(ip, whichfork)) { |
5340 | ASSERT(cur != NULL); | |
5341 | error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags, | |
5342 | whichfork); | |
5343 | logflags |= tmp_logflags; | |
5344 | if (error) | |
5345 | goto error0; | |
5346 | } | |
1da177e4 | 5347 | /* |
9e5987a7 | 5348 | * transform from extents to local? |
1da177e4 | 5349 | */ |
9e5987a7 DC |
5350 | error = 0; |
5351 | error0: | |
5352 | /* | |
5353 | * Log everything. Do this after conversion, there's no point in | |
5354 | * logging the extent records if we've converted to btree format. | |
5355 | */ | |
5356 | if ((logflags & xfs_ilog_fext(whichfork)) && | |
5357 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
5358 | logflags &= ~xfs_ilog_fext(whichfork); | |
5359 | else if ((logflags & xfs_ilog_fbroot(whichfork)) && | |
5360 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) | |
5361 | logflags &= ~xfs_ilog_fbroot(whichfork); | |
5362 | /* | |
5363 | * Log inode even in the error case, if the transaction | |
5364 | * is dirty we'll need to shut down the filesystem. | |
5365 | */ | |
5366 | if (logflags) | |
5367 | xfs_trans_log_inode(tp, ip, logflags); | |
5368 | if (cur) { | |
5369 | if (!error) { | |
5370 | *firstblock = cur->bc_private.b.firstblock; | |
5371 | cur->bc_private.b.allocated = 0; | |
5372 | } | |
5373 | xfs_btree_del_cursor(cur, | |
5374 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
5375 | } | |
5376 | return error; | |
5377 | } | |
e1d8fb88 | 5378 | |
ddb19e31 BF |
5379 | /* |
5380 | * Determine whether an extent shift can be accomplished by a merge with the | |
5381 | * extent that precedes the target hole of the shift. | |
5382 | */ | |
5383 | STATIC bool | |
5384 | xfs_bmse_can_merge( | |
5385 | struct xfs_bmbt_irec *left, /* preceding extent */ | |
5386 | struct xfs_bmbt_irec *got, /* current extent to shift */ | |
5387 | xfs_fileoff_t shift) /* shift fsb */ | |
5388 | { | |
5389 | xfs_fileoff_t startoff; | |
5390 | ||
5391 | startoff = got->br_startoff - shift; | |
5392 | ||
5393 | /* | |
5394 | * The extent, once shifted, must be adjacent in-file and on-disk with | |
5395 | * the preceding extent. | |
5396 | */ | |
5397 | if ((left->br_startoff + left->br_blockcount != startoff) || | |
5398 | (left->br_startblock + left->br_blockcount != got->br_startblock) || | |
5399 | (left->br_state != got->br_state) || | |
5400 | (left->br_blockcount + got->br_blockcount > MAXEXTLEN)) | |
5401 | return false; | |
5402 | ||
5403 | return true; | |
5404 | } | |
5405 | ||
5406 | /* | |
5407 | * A bmap extent shift adjusts the file offset of an extent to fill a preceding | |
5408 | * hole in the file. If an extent shift would result in the extent being fully | |
5409 | * adjacent to the extent that currently precedes the hole, we can merge with | |
5410 | * the preceding extent rather than do the shift. | |
5411 | * | |
5412 | * This function assumes the caller has verified a shift-by-merge is possible | |
5413 | * with the provided extents via xfs_bmse_can_merge(). | |
5414 | */ | |
5415 | STATIC int | |
5416 | xfs_bmse_merge( | |
5417 | struct xfs_inode *ip, | |
5418 | int whichfork, | |
5419 | xfs_fileoff_t shift, /* shift fsb */ | |
5420 | int current_ext, /* idx of gotp */ | |
5421 | struct xfs_bmbt_rec_host *gotp, /* extent to shift */ | |
5422 | struct xfs_bmbt_rec_host *leftp, /* preceding extent */ | |
5423 | struct xfs_btree_cur *cur, | |
5424 | int *logflags) /* output */ | |
5425 | { | |
ddb19e31 BF |
5426 | struct xfs_bmbt_irec got; |
5427 | struct xfs_bmbt_irec left; | |
5428 | xfs_filblks_t blockcount; | |
5429 | int error, i; | |
5fb5aeee | 5430 | struct xfs_mount *mp = ip->i_mount; |
ddb19e31 | 5431 | |
ddb19e31 BF |
5432 | xfs_bmbt_get_all(gotp, &got); |
5433 | xfs_bmbt_get_all(leftp, &left); | |
5434 | blockcount = left.br_blockcount + got.br_blockcount; | |
5435 | ||
5436 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); | |
5437 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
5438 | ASSERT(xfs_bmse_can_merge(&left, &got, shift)); | |
5439 | ||
5440 | /* | |
5441 | * Merge the in-core extents. Note that the host record pointers and | |
5442 | * current_ext index are invalid once the extent has been removed via | |
5443 | * xfs_iext_remove(). | |
5444 | */ | |
5445 | xfs_bmbt_set_blockcount(leftp, blockcount); | |
5446 | xfs_iext_remove(ip, current_ext, 1, 0); | |
5447 | ||
5448 | /* | |
5449 | * Update the on-disk extent count, the btree if necessary and log the | |
5450 | * inode. | |
5451 | */ | |
5452 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
5453 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
5454 | *logflags |= XFS_ILOG_CORE; | |
5455 | if (!cur) { | |
5456 | *logflags |= XFS_ILOG_DEXT; | |
5457 | return 0; | |
5458 | } | |
5459 | ||
5460 | /* lookup and remove the extent to merge */ | |
5461 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock, | |
5462 | got.br_blockcount, &i); | |
5463 | if (error) | |
4db431f5 | 5464 | return error; |
5fb5aeee | 5465 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
ddb19e31 BF |
5466 | |
5467 | error = xfs_btree_delete(cur, &i); | |
5468 | if (error) | |
4db431f5 | 5469 | return error; |
5fb5aeee | 5470 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
ddb19e31 BF |
5471 | |
5472 | /* lookup and update size of the previous extent */ | |
5473 | error = xfs_bmbt_lookup_eq(cur, left.br_startoff, left.br_startblock, | |
5474 | left.br_blockcount, &i); | |
5475 | if (error) | |
4db431f5 | 5476 | return error; |
5fb5aeee | 5477 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
ddb19e31 BF |
5478 | |
5479 | left.br_blockcount = blockcount; | |
5480 | ||
4db431f5 DC |
5481 | return xfs_bmbt_update(cur, left.br_startoff, left.br_startblock, |
5482 | left.br_blockcount, left.br_state); | |
ddb19e31 BF |
5483 | } |
5484 | ||
a979bdfe BF |
5485 | /* |
5486 | * Shift a single extent. | |
5487 | */ | |
5488 | STATIC int | |
5489 | xfs_bmse_shift_one( | |
5490 | struct xfs_inode *ip, | |
5491 | int whichfork, | |
5492 | xfs_fileoff_t offset_shift_fsb, | |
5493 | int *current_ext, | |
5494 | struct xfs_bmbt_rec_host *gotp, | |
5495 | struct xfs_btree_cur *cur, | |
a904b1ca NJ |
5496 | int *logflags, |
5497 | enum shift_direction direction) | |
a979bdfe BF |
5498 | { |
5499 | struct xfs_ifork *ifp; | |
5fb5aeee | 5500 | struct xfs_mount *mp; |
a979bdfe | 5501 | xfs_fileoff_t startoff; |
a904b1ca | 5502 | struct xfs_bmbt_rec_host *adj_irecp; |
a979bdfe | 5503 | struct xfs_bmbt_irec got; |
a904b1ca | 5504 | struct xfs_bmbt_irec adj_irec; |
a979bdfe BF |
5505 | int error; |
5506 | int i; | |
a904b1ca | 5507 | int total_extents; |
a979bdfe | 5508 | |
5fb5aeee | 5509 | mp = ip->i_mount; |
a979bdfe | 5510 | ifp = XFS_IFORK_PTR(ip, whichfork); |
a904b1ca | 5511 | total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); |
a979bdfe BF |
5512 | |
5513 | xfs_bmbt_get_all(gotp, &got); | |
a979bdfe | 5514 | |
f71721d0 | 5515 | /* delalloc extents should be prevented by caller */ |
5fb5aeee | 5516 | XFS_WANT_CORRUPTED_RETURN(mp, !isnullstartblock(got.br_startblock)); |
f71721d0 | 5517 | |
a904b1ca NJ |
5518 | if (direction == SHIFT_LEFT) { |
5519 | startoff = got.br_startoff - offset_shift_fsb; | |
5520 | ||
5521 | /* | |
5522 | * Check for merge if we've got an extent to the left, | |
5523 | * otherwise make sure there's enough room at the start | |
5524 | * of the file for the shift. | |
5525 | */ | |
5526 | if (!*current_ext) { | |
5527 | if (got.br_startoff < offset_shift_fsb) | |
5528 | return -EINVAL; | |
5529 | goto update_current_ext; | |
5530 | } | |
5531 | /* | |
5532 | * grab the left extent and check for a large | |
5533 | * enough hole. | |
5534 | */ | |
5535 | adj_irecp = xfs_iext_get_ext(ifp, *current_ext - 1); | |
5536 | xfs_bmbt_get_all(adj_irecp, &adj_irec); | |
a979bdfe | 5537 | |
a904b1ca NJ |
5538 | if (startoff < |
5539 | adj_irec.br_startoff + adj_irec.br_blockcount) | |
b11bd671 | 5540 | return -EINVAL; |
a979bdfe | 5541 | |
b11bd671 | 5542 | /* check whether to merge the extent or shift it down */ |
a904b1ca NJ |
5543 | if (xfs_bmse_can_merge(&adj_irec, &got, |
5544 | offset_shift_fsb)) { | |
b11bd671 | 5545 | return xfs_bmse_merge(ip, whichfork, offset_shift_fsb, |
a904b1ca NJ |
5546 | *current_ext, gotp, adj_irecp, |
5547 | cur, logflags); | |
b11bd671 | 5548 | } |
a904b1ca NJ |
5549 | } else { |
5550 | startoff = got.br_startoff + offset_shift_fsb; | |
5551 | /* nothing to move if this is the last extent */ | |
5552 | if (*current_ext >= (total_extents - 1)) | |
5553 | goto update_current_ext; | |
5554 | /* | |
5555 | * If this is not the last extent in the file, make sure there | |
5556 | * is enough room between current extent and next extent for | |
5557 | * accommodating the shift. | |
5558 | */ | |
5559 | adj_irecp = xfs_iext_get_ext(ifp, *current_ext + 1); | |
5560 | xfs_bmbt_get_all(adj_irecp, &adj_irec); | |
5561 | if (startoff + got.br_blockcount > adj_irec.br_startoff) | |
5562 | return -EINVAL; | |
5563 | /* | |
5564 | * Unlike a left shift (which involves a hole punch), | |
5565 | * a right shift does not modify extent neighbors | |
5566 | * in any way. We should never find mergeable extents | |
5567 | * in this scenario. Check anyways and warn if we | |
5568 | * encounter two extents that could be one. | |
5569 | */ | |
5570 | if (xfs_bmse_can_merge(&got, &adj_irec, offset_shift_fsb)) | |
5571 | WARN_ON_ONCE(1); | |
5572 | } | |
a979bdfe BF |
5573 | /* |
5574 | * Increment the extent index for the next iteration, update the start | |
5575 | * offset of the in-core extent and update the btree if applicable. | |
5576 | */ | |
a904b1ca NJ |
5577 | update_current_ext: |
5578 | if (direction == SHIFT_LEFT) | |
5579 | (*current_ext)++; | |
5580 | else | |
5581 | (*current_ext)--; | |
a979bdfe BF |
5582 | xfs_bmbt_set_startoff(gotp, startoff); |
5583 | *logflags |= XFS_ILOG_CORE; | |
5584 | if (!cur) { | |
5585 | *logflags |= XFS_ILOG_DEXT; | |
5586 | return 0; | |
5587 | } | |
5588 | ||
5589 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, got.br_startblock, | |
5590 | got.br_blockcount, &i); | |
5591 | if (error) | |
5592 | return error; | |
5fb5aeee | 5593 | XFS_WANT_CORRUPTED_RETURN(mp, i == 1); |
a979bdfe BF |
5594 | |
5595 | got.br_startoff = startoff; | |
d254aaec | 5596 | return xfs_bmbt_update(cur, got.br_startoff, got.br_startblock, |
a904b1ca | 5597 | got.br_blockcount, got.br_state); |
a979bdfe BF |
5598 | } |
5599 | ||
e1d8fb88 | 5600 | /* |
a904b1ca | 5601 | * Shift extent records to the left/right to cover/create a hole. |
e1d8fb88 | 5602 | * |
2c845f5a | 5603 | * The maximum number of extents to be shifted in a single operation is |
a904b1ca | 5604 | * @num_exts. @stop_fsb specifies the file offset at which to stop shift and the |
2c845f5a BF |
5605 | * file offset where we've left off is returned in @next_fsb. @offset_shift_fsb |
5606 | * is the length by which each extent is shifted. If there is no hole to shift | |
5607 | * the extents into, this will be considered invalid operation and we abort | |
5608 | * immediately. | |
e1d8fb88 NJ |
5609 | */ |
5610 | int | |
5611 | xfs_bmap_shift_extents( | |
5612 | struct xfs_trans *tp, | |
5613 | struct xfs_inode *ip, | |
a904b1ca | 5614 | xfs_fileoff_t *next_fsb, |
e1d8fb88 | 5615 | xfs_fileoff_t offset_shift_fsb, |
2c845f5a | 5616 | int *done, |
a904b1ca | 5617 | xfs_fileoff_t stop_fsb, |
e1d8fb88 NJ |
5618 | xfs_fsblock_t *firstblock, |
5619 | struct xfs_bmap_free *flist, | |
a904b1ca | 5620 | enum shift_direction direction, |
e1d8fb88 NJ |
5621 | int num_exts) |
5622 | { | |
ca446d88 | 5623 | struct xfs_btree_cur *cur = NULL; |
e1d8fb88 NJ |
5624 | struct xfs_bmbt_rec_host *gotp; |
5625 | struct xfs_bmbt_irec got; | |
e1d8fb88 NJ |
5626 | struct xfs_mount *mp = ip->i_mount; |
5627 | struct xfs_ifork *ifp; | |
5628 | xfs_extnum_t nexts = 0; | |
2c845f5a | 5629 | xfs_extnum_t current_ext; |
a904b1ca NJ |
5630 | xfs_extnum_t total_extents; |
5631 | xfs_extnum_t stop_extent; | |
e1d8fb88 | 5632 | int error = 0; |
e1d8fb88 | 5633 | int whichfork = XFS_DATA_FORK; |
ca446d88 | 5634 | int logflags = 0; |
e1d8fb88 NJ |
5635 | |
5636 | if (unlikely(XFS_TEST_ERROR( | |
5637 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5638 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
5639 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
5640 | XFS_ERROR_REPORT("xfs_bmap_shift_extents", | |
5641 | XFS_ERRLEVEL_LOW, mp); | |
2451337d | 5642 | return -EFSCORRUPTED; |
e1d8fb88 NJ |
5643 | } |
5644 | ||
5645 | if (XFS_FORCED_SHUTDOWN(mp)) | |
2451337d | 5646 | return -EIO; |
e1d8fb88 | 5647 | |
2c845f5a BF |
5648 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
5649 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
a904b1ca NJ |
5650 | ASSERT(direction == SHIFT_LEFT || direction == SHIFT_RIGHT); |
5651 | ASSERT(*next_fsb != NULLFSBLOCK || direction == SHIFT_RIGHT); | |
e1d8fb88 NJ |
5652 | |
5653 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
e1d8fb88 NJ |
5654 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { |
5655 | /* Read in all the extents */ | |
5656 | error = xfs_iread_extents(tp, ip, whichfork); | |
5657 | if (error) | |
5658 | return error; | |
5659 | } | |
5660 | ||
ddb19e31 BF |
5661 | if (ifp->if_flags & XFS_IFBROOT) { |
5662 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
5663 | cur->bc_private.b.firstblock = *firstblock; | |
5664 | cur->bc_private.b.flist = flist; | |
5665 | cur->bc_private.b.flags = 0; | |
5666 | } | |
5667 | ||
a904b1ca NJ |
5668 | /* |
5669 | * There may be delalloc extents in the data fork before the range we | |
5670 | * are collapsing out, so we cannot use the count of real extents here. | |
5671 | * Instead we have to calculate it from the incore fork. | |
5672 | */ | |
5673 | total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); | |
5674 | if (total_extents == 0) { | |
5675 | *done = 1; | |
5676 | goto del_cursor; | |
5677 | } | |
5678 | ||
5679 | /* | |
5680 | * In case of first right shift, we need to initialize next_fsb | |
5681 | */ | |
5682 | if (*next_fsb == NULLFSBLOCK) { | |
5683 | gotp = xfs_iext_get_ext(ifp, total_extents - 1); | |
5684 | xfs_bmbt_get_all(gotp, &got); | |
5685 | *next_fsb = got.br_startoff; | |
5686 | if (stop_fsb > *next_fsb) { | |
5687 | *done = 1; | |
5688 | goto del_cursor; | |
5689 | } | |
5690 | } | |
5691 | ||
5692 | /* Lookup the extent index at which we have to stop */ | |
5693 | if (direction == SHIFT_RIGHT) { | |
5694 | gotp = xfs_iext_bno_to_ext(ifp, stop_fsb, &stop_extent); | |
5695 | /* Make stop_extent exclusive of shift range */ | |
5696 | stop_extent--; | |
5697 | } else | |
5698 | stop_extent = total_extents; | |
5699 | ||
e1d8fb88 | 5700 | /* |
2c845f5a BF |
5701 | * Look up the extent index for the fsb where we start shifting. We can |
5702 | * henceforth iterate with current_ext as extent list changes are locked | |
5703 | * out via ilock. | |
5704 | * | |
5705 | * gotp can be null in 2 cases: 1) if there are no extents or 2) | |
a904b1ca | 5706 | * *next_fsb lies in a hole beyond which there are no extents. Either |
2c845f5a | 5707 | * way, we are done. |
e1d8fb88 | 5708 | */ |
a904b1ca | 5709 | gotp = xfs_iext_bno_to_ext(ifp, *next_fsb, ¤t_ext); |
2c845f5a BF |
5710 | if (!gotp) { |
5711 | *done = 1; | |
ddb19e31 | 5712 | goto del_cursor; |
e1d8fb88 | 5713 | } |
e1d8fb88 | 5714 | |
a904b1ca NJ |
5715 | /* some sanity checking before we finally start shifting extents */ |
5716 | if ((direction == SHIFT_LEFT && current_ext >= stop_extent) || | |
5717 | (direction == SHIFT_RIGHT && current_ext <= stop_extent)) { | |
5718 | error = -EIO; | |
5719 | goto del_cursor; | |
5720 | } | |
5721 | ||
5722 | while (nexts++ < num_exts) { | |
a979bdfe | 5723 | error = xfs_bmse_shift_one(ip, whichfork, offset_shift_fsb, |
a904b1ca NJ |
5724 | ¤t_ext, gotp, cur, &logflags, |
5725 | direction); | |
a979bdfe BF |
5726 | if (error) |
5727 | goto del_cursor; | |
a904b1ca NJ |
5728 | /* |
5729 | * If there was an extent merge during the shift, the extent | |
5730 | * count can change. Update the total and grade the next record. | |
5731 | */ | |
5732 | if (direction == SHIFT_LEFT) { | |
5733 | total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t); | |
5734 | stop_extent = total_extents; | |
5735 | } | |
e1d8fb88 | 5736 | |
a904b1ca NJ |
5737 | if (current_ext == stop_extent) { |
5738 | *done = 1; | |
5739 | *next_fsb = NULLFSBLOCK; | |
ddb19e31 | 5740 | break; |
a904b1ca | 5741 | } |
ddb19e31 | 5742 | gotp = xfs_iext_get_ext(ifp, current_ext); |
e1d8fb88 NJ |
5743 | } |
5744 | ||
a904b1ca | 5745 | if (!*done) { |
a979bdfe | 5746 | xfs_bmbt_get_all(gotp, &got); |
2c845f5a | 5747 | *next_fsb = got.br_startoff; |
a979bdfe | 5748 | } |
e1d8fb88 NJ |
5749 | |
5750 | del_cursor: | |
5751 | if (cur) | |
5752 | xfs_btree_del_cursor(cur, | |
5753 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
5754 | ||
ca446d88 BF |
5755 | if (logflags) |
5756 | xfs_trans_log_inode(tp, ip, logflags); | |
2c845f5a | 5757 | |
e1d8fb88 NJ |
5758 | return error; |
5759 | } | |
a904b1ca NJ |
5760 | |
5761 | /* | |
5762 | * Splits an extent into two extents at split_fsb block such that it is | |
5763 | * the first block of the current_ext. @current_ext is a target extent | |
5764 | * to be split. @split_fsb is a block where the extents is split. | |
5765 | * If split_fsb lies in a hole or the first block of extents, just return 0. | |
5766 | */ | |
5767 | STATIC int | |
5768 | xfs_bmap_split_extent_at( | |
5769 | struct xfs_trans *tp, | |
5770 | struct xfs_inode *ip, | |
5771 | xfs_fileoff_t split_fsb, | |
5772 | xfs_fsblock_t *firstfsb, | |
5773 | struct xfs_bmap_free *free_list) | |
5774 | { | |
5775 | int whichfork = XFS_DATA_FORK; | |
5776 | struct xfs_btree_cur *cur = NULL; | |
5777 | struct xfs_bmbt_rec_host *gotp; | |
5778 | struct xfs_bmbt_irec got; | |
5779 | struct xfs_bmbt_irec new; /* split extent */ | |
5780 | struct xfs_mount *mp = ip->i_mount; | |
5781 | struct xfs_ifork *ifp; | |
5782 | xfs_fsblock_t gotblkcnt; /* new block count for got */ | |
5783 | xfs_extnum_t current_ext; | |
5784 | int error = 0; | |
5785 | int logflags = 0; | |
5786 | int i = 0; | |
5787 | ||
5788 | if (unlikely(XFS_TEST_ERROR( | |
5789 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5790 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE), | |
5791 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
5792 | XFS_ERROR_REPORT("xfs_bmap_split_extent_at", | |
5793 | XFS_ERRLEVEL_LOW, mp); | |
5794 | return -EFSCORRUPTED; | |
5795 | } | |
5796 | ||
5797 | if (XFS_FORCED_SHUTDOWN(mp)) | |
5798 | return -EIO; | |
5799 | ||
5800 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5801 | if (!(ifp->if_flags & XFS_IFEXTENTS)) { | |
5802 | /* Read in all the extents */ | |
5803 | error = xfs_iread_extents(tp, ip, whichfork); | |
5804 | if (error) | |
5805 | return error; | |
5806 | } | |
5807 | ||
5808 | /* | |
5809 | * gotp can be null in 2 cases: 1) if there are no extents | |
5810 | * or 2) split_fsb lies in a hole beyond which there are | |
5811 | * no extents. Either way, we are done. | |
5812 | */ | |
5813 | gotp = xfs_iext_bno_to_ext(ifp, split_fsb, ¤t_ext); | |
5814 | if (!gotp) | |
5815 | return 0; | |
5816 | ||
5817 | xfs_bmbt_get_all(gotp, &got); | |
5818 | ||
5819 | /* | |
5820 | * Check split_fsb lies in a hole or the start boundary offset | |
5821 | * of the extent. | |
5822 | */ | |
5823 | if (got.br_startoff >= split_fsb) | |
5824 | return 0; | |
5825 | ||
5826 | gotblkcnt = split_fsb - got.br_startoff; | |
5827 | new.br_startoff = split_fsb; | |
5828 | new.br_startblock = got.br_startblock + gotblkcnt; | |
5829 | new.br_blockcount = got.br_blockcount - gotblkcnt; | |
5830 | new.br_state = got.br_state; | |
5831 | ||
5832 | if (ifp->if_flags & XFS_IFBROOT) { | |
5833 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); | |
5834 | cur->bc_private.b.firstblock = *firstfsb; | |
5835 | cur->bc_private.b.flist = free_list; | |
5836 | cur->bc_private.b.flags = 0; | |
5837 | error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
5838 | got.br_startblock, | |
5839 | got.br_blockcount, | |
5840 | &i); | |
5841 | if (error) | |
5842 | goto del_cursor; | |
5843 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); | |
5844 | } | |
5845 | ||
5846 | xfs_bmbt_set_blockcount(gotp, gotblkcnt); | |
5847 | got.br_blockcount = gotblkcnt; | |
5848 | ||
5849 | logflags = XFS_ILOG_CORE; | |
5850 | if (cur) { | |
5851 | error = xfs_bmbt_update(cur, got.br_startoff, | |
5852 | got.br_startblock, | |
5853 | got.br_blockcount, | |
5854 | got.br_state); | |
5855 | if (error) | |
5856 | goto del_cursor; | |
5857 | } else | |
5858 | logflags |= XFS_ILOG_DEXT; | |
5859 | ||
5860 | /* Add new extent */ | |
5861 | current_ext++; | |
5862 | xfs_iext_insert(ip, current_ext, 1, &new, 0); | |
5863 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
5864 | XFS_IFORK_NEXTENTS(ip, whichfork) + 1); | |
5865 | ||
5866 | if (cur) { | |
5867 | error = xfs_bmbt_lookup_eq(cur, new.br_startoff, | |
5868 | new.br_startblock, new.br_blockcount, | |
5869 | &i); | |
5870 | if (error) | |
5871 | goto del_cursor; | |
5872 | XFS_WANT_CORRUPTED_GOTO(mp, i == 0, del_cursor); | |
5873 | cur->bc_rec.b.br_state = new.br_state; | |
5874 | ||
5875 | error = xfs_btree_insert(cur, &i); | |
5876 | if (error) | |
5877 | goto del_cursor; | |
5878 | XFS_WANT_CORRUPTED_GOTO(mp, i == 1, del_cursor); | |
5879 | } | |
5880 | ||
5881 | /* | |
5882 | * Convert to a btree if necessary. | |
5883 | */ | |
5884 | if (xfs_bmap_needs_btree(ip, whichfork)) { | |
5885 | int tmp_logflags; /* partial log flag return val */ | |
5886 | ||
5887 | ASSERT(cur == NULL); | |
5888 | error = xfs_bmap_extents_to_btree(tp, ip, firstfsb, free_list, | |
5889 | &cur, 0, &tmp_logflags, whichfork); | |
5890 | logflags |= tmp_logflags; | |
5891 | } | |
5892 | ||
5893 | del_cursor: | |
5894 | if (cur) { | |
5895 | cur->bc_private.b.allocated = 0; | |
5896 | xfs_btree_del_cursor(cur, | |
5897 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
5898 | } | |
5899 | ||
5900 | if (logflags) | |
5901 | xfs_trans_log_inode(tp, ip, logflags); | |
5902 | return error; | |
5903 | } | |
5904 | ||
5905 | int | |
5906 | xfs_bmap_split_extent( | |
5907 | struct xfs_inode *ip, | |
5908 | xfs_fileoff_t split_fsb) | |
5909 | { | |
5910 | struct xfs_mount *mp = ip->i_mount; | |
5911 | struct xfs_trans *tp; | |
5912 | struct xfs_bmap_free free_list; | |
5913 | xfs_fsblock_t firstfsb; | |
5914 | int committed; | |
5915 | int error; | |
5916 | ||
5917 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
5918 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, | |
5919 | XFS_DIOSTRAT_SPACE_RES(mp, 0), 0); | |
5920 | if (error) { | |
5921 | xfs_trans_cancel(tp, 0); | |
5922 | return error; | |
5923 | } | |
5924 | ||
5925 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
5926 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
5927 | ||
5928 | xfs_bmap_init(&free_list, &firstfsb); | |
5929 | ||
5930 | error = xfs_bmap_split_extent_at(tp, ip, split_fsb, | |
5931 | &firstfsb, &free_list); | |
5932 | if (error) | |
5933 | goto out; | |
5934 | ||
5935 | error = xfs_bmap_finish(&tp, &free_list, &committed); | |
5936 | if (error) | |
5937 | goto out; | |
5938 | ||
5939 | return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); | |
5940 | ||
5941 | ||
5942 | out: | |
5943 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
5944 | return error; | |
5945 | } |