Commit | Line | Data |
---|---|---|
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" |
1da177e4 | 20 | #include "xfs_types.h" |
a844f451 | 21 | #include "xfs_bit.h" |
1da177e4 | 22 | #include "xfs_log.h" |
a844f451 | 23 | #include "xfs_inum.h" |
1da177e4 LT |
24 | #include "xfs_trans.h" |
25 | #include "xfs_sb.h" | |
26 | #include "xfs_ag.h" | |
1da177e4 | 27 | #include "xfs_dir2.h" |
a844f451 | 28 | #include "xfs_da_btree.h" |
1da177e4 | 29 | #include "xfs_bmap_btree.h" |
a844f451 | 30 | #include "xfs_alloc_btree.h" |
1da177e4 | 31 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
32 | #include "xfs_dir2_sf.h" |
33 | #include "xfs_dinode.h" | |
1da177e4 | 34 | #include "xfs_inode.h" |
a844f451 | 35 | #include "xfs_btree.h" |
a844f451 | 36 | #include "xfs_mount.h" |
1da177e4 | 37 | #include "xfs_itable.h" |
f6c2d1fa NS |
38 | #include "xfs_dir2_data.h" |
39 | #include "xfs_dir2_leaf.h" | |
40 | #include "xfs_dir2_block.h" | |
a844f451 | 41 | #include "xfs_inode_item.h" |
1da177e4 LT |
42 | #include "xfs_extfree_item.h" |
43 | #include "xfs_alloc.h" | |
44 | #include "xfs_bmap.h" | |
45 | #include "xfs_rtalloc.h" | |
46 | #include "xfs_error.h" | |
d8cc890d | 47 | #include "xfs_attr_leaf.h" |
1da177e4 LT |
48 | #include "xfs_rw.h" |
49 | #include "xfs_quota.h" | |
50 | #include "xfs_trans_space.h" | |
51 | #include "xfs_buf_item.h" | |
2a82b8be | 52 | #include "xfs_filestream.h" |
739bfb2a | 53 | #include "xfs_vnodeops.h" |
0b1b213f | 54 | #include "xfs_trace.h" |
1da177e4 LT |
55 | |
56 | ||
57 | #ifdef DEBUG | |
58 | STATIC void | |
59 | xfs_bmap_check_leaf_extents(xfs_btree_cur_t *cur, xfs_inode_t *ip, int whichfork); | |
60 | #endif | |
61 | ||
62 | kmem_zone_t *xfs_bmap_free_item_zone; | |
63 | ||
64 | /* | |
65 | * Prototypes for internal bmap routines. | |
66 | */ | |
67 | ||
68 | ||
69 | /* | |
70 | * Called from xfs_bmap_add_attrfork to handle extents format files. | |
71 | */ | |
72 | STATIC int /* error */ | |
73 | xfs_bmap_add_attrfork_extents( | |
74 | xfs_trans_t *tp, /* transaction pointer */ | |
75 | xfs_inode_t *ip, /* incore inode pointer */ | |
76 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
77 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
78 | int *flags); /* inode logging flags */ | |
79 | ||
80 | /* | |
81 | * Called from xfs_bmap_add_attrfork to handle local format files. | |
82 | */ | |
83 | STATIC int /* error */ | |
84 | xfs_bmap_add_attrfork_local( | |
85 | xfs_trans_t *tp, /* transaction pointer */ | |
86 | xfs_inode_t *ip, /* incore inode pointer */ | |
87 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
88 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
89 | int *flags); /* inode logging flags */ | |
90 | ||
91 | /* | |
4eea22f0 | 92 | * Called by xfs_bmapi to update file extent records and the btree |
1da177e4 LT |
93 | * after allocating space (or doing a delayed allocation). |
94 | */ | |
95 | STATIC int /* error */ | |
96 | xfs_bmap_add_extent( | |
97 | xfs_inode_t *ip, /* incore inode pointer */ | |
98 | xfs_extnum_t idx, /* extent number to update/insert */ | |
99 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
4eea22f0 | 100 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
1da177e4 LT |
101 | xfs_fsblock_t *first, /* pointer to firstblock variable */ |
102 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
103 | int *logflagsp, /* inode logging flags */ | |
104 | int whichfork, /* data or attr fork */ | |
105 | int rsvd); /* OK to allocate reserved blocks */ | |
106 | ||
107 | /* | |
108 | * Called by xfs_bmap_add_extent to handle cases converting a delayed | |
109 | * allocation to a real allocation. | |
110 | */ | |
111 | STATIC int /* error */ | |
112 | xfs_bmap_add_extent_delay_real( | |
113 | xfs_inode_t *ip, /* incore inode pointer */ | |
114 | xfs_extnum_t idx, /* extent number to update/insert */ | |
115 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
4eea22f0 | 116 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
1da177e4 LT |
117 | xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */ |
118 | xfs_fsblock_t *first, /* pointer to firstblock variable */ | |
119 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
120 | int *logflagsp, /* inode logging flags */ | |
121 | int rsvd); /* OK to allocate reserved blocks */ | |
122 | ||
123 | /* | |
124 | * Called by xfs_bmap_add_extent to handle cases converting a hole | |
125 | * to a delayed allocation. | |
126 | */ | |
127 | STATIC int /* error */ | |
128 | xfs_bmap_add_extent_hole_delay( | |
129 | xfs_inode_t *ip, /* incore inode pointer */ | |
130 | xfs_extnum_t idx, /* extent number to update/insert */ | |
4eea22f0 | 131 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
1da177e4 LT |
132 | int *logflagsp,/* inode logging flags */ |
133 | int rsvd); /* OK to allocate reserved blocks */ | |
134 | ||
135 | /* | |
136 | * Called by xfs_bmap_add_extent to handle cases converting a hole | |
137 | * to a real allocation. | |
138 | */ | |
139 | STATIC int /* error */ | |
140 | xfs_bmap_add_extent_hole_real( | |
141 | xfs_inode_t *ip, /* incore inode pointer */ | |
142 | xfs_extnum_t idx, /* extent number to update/insert */ | |
143 | xfs_btree_cur_t *cur, /* if null, not a btree */ | |
4eea22f0 | 144 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
1da177e4 LT |
145 | int *logflagsp, /* inode logging flags */ |
146 | int whichfork); /* data or attr fork */ | |
147 | ||
148 | /* | |
149 | * Called by xfs_bmap_add_extent to handle cases converting an unwritten | |
150 | * allocation to a real allocation or vice versa. | |
151 | */ | |
152 | STATIC int /* error */ | |
153 | xfs_bmap_add_extent_unwritten_real( | |
154 | xfs_inode_t *ip, /* incore inode pointer */ | |
155 | xfs_extnum_t idx, /* extent number to update/insert */ | |
156 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
4eea22f0 | 157 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
b4e9181e | 158 | int *logflagsp); /* inode logging flags */ |
1da177e4 LT |
159 | |
160 | /* | |
161 | * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. | |
162 | * It figures out where to ask the underlying allocator to put the new extent. | |
163 | */ | |
164 | STATIC int /* error */ | |
165 | xfs_bmap_alloc( | |
166 | xfs_bmalloca_t *ap); /* bmap alloc argument struct */ | |
167 | ||
168 | /* | |
169 | * Transform a btree format file with only one leaf node, where the | |
170 | * extents list will fit in the inode, into an extents format file. | |
4eea22f0 | 171 | * Since the file extents are already in-core, all we have to do is |
1da177e4 LT |
172 | * give up the space for the btree root and pitch the leaf block. |
173 | */ | |
174 | STATIC int /* error */ | |
175 | xfs_bmap_btree_to_extents( | |
176 | xfs_trans_t *tp, /* transaction pointer */ | |
177 | xfs_inode_t *ip, /* incore inode pointer */ | |
178 | xfs_btree_cur_t *cur, /* btree cursor */ | |
179 | int *logflagsp, /* inode logging flags */ | |
180 | int whichfork); /* data or attr fork */ | |
181 | ||
1da177e4 | 182 | /* |
4eea22f0 | 183 | * Called by xfs_bmapi to update file extent records and the btree |
1da177e4 LT |
184 | * after removing space (or undoing a delayed allocation). |
185 | */ | |
186 | STATIC int /* error */ | |
187 | xfs_bmap_del_extent( | |
188 | xfs_inode_t *ip, /* incore inode pointer */ | |
189 | xfs_trans_t *tp, /* current trans pointer */ | |
190 | xfs_extnum_t idx, /* extent number to update/insert */ | |
191 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
192 | xfs_btree_cur_t *cur, /* if null, not a btree */ | |
4eea22f0 | 193 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
1da177e4 LT |
194 | int *logflagsp,/* inode logging flags */ |
195 | int whichfork, /* data or attr fork */ | |
196 | int rsvd); /* OK to allocate reserved blocks */ | |
197 | ||
198 | /* | |
199 | * Remove the entry "free" from the free item list. Prev points to the | |
200 | * previous entry, unless "free" is the head of the list. | |
201 | */ | |
202 | STATIC void | |
203 | xfs_bmap_del_free( | |
204 | xfs_bmap_free_t *flist, /* free item list header */ | |
205 | xfs_bmap_free_item_t *prev, /* previous item on list, if any */ | |
206 | xfs_bmap_free_item_t *free); /* list item to be freed */ | |
207 | ||
1da177e4 LT |
208 | /* |
209 | * Convert an extents-format file into a btree-format file. | |
210 | * The new file will have a root block (in the inode) and a single child block. | |
211 | */ | |
212 | STATIC int /* error */ | |
213 | xfs_bmap_extents_to_btree( | |
214 | xfs_trans_t *tp, /* transaction pointer */ | |
215 | xfs_inode_t *ip, /* incore inode pointer */ | |
216 | xfs_fsblock_t *firstblock, /* first-block-allocated */ | |
217 | xfs_bmap_free_t *flist, /* blocks freed in xaction */ | |
218 | xfs_btree_cur_t **curp, /* cursor returned to caller */ | |
219 | int wasdel, /* converting a delayed alloc */ | |
220 | int *logflagsp, /* inode logging flags */ | |
221 | int whichfork); /* data or attr fork */ | |
222 | ||
1da177e4 LT |
223 | /* |
224 | * Convert a local file to an extents file. | |
225 | * This code is sort of bogus, since the file data needs to get | |
226 | * logged so it won't be lost. The bmap-level manipulations are ok, though. | |
227 | */ | |
228 | STATIC int /* error */ | |
229 | xfs_bmap_local_to_extents( | |
230 | xfs_trans_t *tp, /* transaction pointer */ | |
231 | xfs_inode_t *ip, /* incore inode pointer */ | |
232 | xfs_fsblock_t *firstblock, /* first block allocated in xaction */ | |
233 | xfs_extlen_t total, /* total blocks needed by transaction */ | |
234 | int *logflagsp, /* inode logging flags */ | |
235 | int whichfork); /* data or attr fork */ | |
236 | ||
237 | /* | |
238 | * Search the extents list for the inode, for the extent containing bno. | |
239 | * If bno lies in a hole, point to the next entry. If bno lies past eof, | |
240 | * *eofp will be set, and *prevp will contain the last entry (null if none). | |
241 | * Else, *lastxp will be set to the index of the found | |
242 | * entry; *gotp will contain the entry. | |
243 | */ | |
a6f64d4a | 244 | STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */ |
1da177e4 LT |
245 | xfs_bmap_search_extents( |
246 | xfs_inode_t *ip, /* incore inode pointer */ | |
247 | xfs_fileoff_t bno, /* block number searched for */ | |
248 | int whichfork, /* data or attr fork */ | |
249 | int *eofp, /* out: end of file found */ | |
250 | xfs_extnum_t *lastxp, /* out: last extent index */ | |
251 | xfs_bmbt_irec_t *gotp, /* out: extent entry found */ | |
252 | xfs_bmbt_irec_t *prevp); /* out: previous extent entry found */ | |
253 | ||
ba0f32d4 CH |
254 | /* |
255 | * Check the last inode extent to determine whether this allocation will result | |
256 | * in blocks being allocated at the end of the file. When we allocate new data | |
257 | * blocks at the end of the file which do not start at the previous data block, | |
258 | * we will try to align the new blocks at stripe unit boundaries. | |
259 | */ | |
260 | STATIC int /* error */ | |
261 | xfs_bmap_isaeof( | |
262 | xfs_inode_t *ip, /* incore inode pointer */ | |
263 | xfs_fileoff_t off, /* file offset in fsblocks */ | |
264 | int whichfork, /* data or attribute fork */ | |
265 | char *aeof); /* return value */ | |
266 | ||
1da177e4 LT |
267 | /* |
268 | * Compute the worst-case number of indirect blocks that will be used | |
269 | * for ip's delayed extent of length "len". | |
270 | */ | |
271 | STATIC xfs_filblks_t | |
272 | xfs_bmap_worst_indlen( | |
273 | xfs_inode_t *ip, /* incore inode pointer */ | |
274 | xfs_filblks_t len); /* delayed extent length */ | |
275 | ||
276 | #ifdef DEBUG | |
277 | /* | |
278 | * Perform various validation checks on the values being returned | |
279 | * from xfs_bmapi(). | |
280 | */ | |
281 | STATIC void | |
282 | xfs_bmap_validate_ret( | |
283 | xfs_fileoff_t bno, | |
284 | xfs_filblks_t len, | |
285 | int flags, | |
286 | xfs_bmbt_irec_t *mval, | |
287 | int nmap, | |
288 | int ret_nmap); | |
289 | #else | |
290 | #define xfs_bmap_validate_ret(bno,len,flags,mval,onmap,nmap) | |
291 | #endif /* DEBUG */ | |
292 | ||
1da177e4 LT |
293 | STATIC int |
294 | xfs_bmap_count_tree( | |
295 | xfs_mount_t *mp, | |
296 | xfs_trans_t *tp, | |
4eea22f0 | 297 | xfs_ifork_t *ifp, |
1da177e4 LT |
298 | xfs_fsblock_t blockno, |
299 | int levelin, | |
300 | int *count); | |
301 | ||
c94312de | 302 | STATIC void |
1da177e4 | 303 | xfs_bmap_count_leaves( |
4eea22f0 MK |
304 | xfs_ifork_t *ifp, |
305 | xfs_extnum_t idx, | |
1da177e4 LT |
306 | int numrecs, |
307 | int *count); | |
308 | ||
c94312de | 309 | STATIC void |
91e11088 | 310 | xfs_bmap_disk_count_leaves( |
136341b4 | 311 | struct xfs_mount *mp, |
7cc95a82 | 312 | struct xfs_btree_block *block, |
91e11088 YL |
313 | int numrecs, |
314 | int *count); | |
315 | ||
1da177e4 LT |
316 | /* |
317 | * Bmap internal routines. | |
318 | */ | |
319 | ||
fe033cc8 CH |
320 | STATIC int /* error */ |
321 | xfs_bmbt_lookup_eq( | |
322 | struct xfs_btree_cur *cur, | |
323 | xfs_fileoff_t off, | |
324 | xfs_fsblock_t bno, | |
325 | xfs_filblks_t len, | |
326 | int *stat) /* success/failure */ | |
327 | { | |
328 | cur->bc_rec.b.br_startoff = off; | |
329 | cur->bc_rec.b.br_startblock = bno; | |
330 | cur->bc_rec.b.br_blockcount = len; | |
331 | return xfs_btree_lookup(cur, XFS_LOOKUP_EQ, stat); | |
332 | } | |
333 | ||
334 | STATIC int /* error */ | |
335 | xfs_bmbt_lookup_ge( | |
336 | struct xfs_btree_cur *cur, | |
337 | xfs_fileoff_t off, | |
338 | xfs_fsblock_t bno, | |
339 | xfs_filblks_t len, | |
340 | int *stat) /* success/failure */ | |
341 | { | |
342 | cur->bc_rec.b.br_startoff = off; | |
343 | cur->bc_rec.b.br_startblock = bno; | |
344 | cur->bc_rec.b.br_blockcount = len; | |
345 | return xfs_btree_lookup(cur, XFS_LOOKUP_GE, stat); | |
346 | } | |
347 | ||
278d0ca1 CH |
348 | /* |
349 | * Update the record referred to by cur to the value given | |
350 | * by [off, bno, len, state]. | |
351 | * This either works (return 0) or gets an EFSCORRUPTED error. | |
352 | */ | |
353 | STATIC int | |
354 | xfs_bmbt_update( | |
355 | struct xfs_btree_cur *cur, | |
356 | xfs_fileoff_t off, | |
357 | xfs_fsblock_t bno, | |
358 | xfs_filblks_t len, | |
359 | xfs_exntst_t state) | |
360 | { | |
361 | union xfs_btree_rec rec; | |
362 | ||
363 | xfs_bmbt_disk_set_allf(&rec.bmbt, off, bno, len, state); | |
364 | return xfs_btree_update(cur, &rec); | |
365 | } | |
fe033cc8 | 366 | |
1da177e4 LT |
367 | /* |
368 | * Called from xfs_bmap_add_attrfork to handle btree format files. | |
369 | */ | |
370 | STATIC int /* error */ | |
371 | xfs_bmap_add_attrfork_btree( | |
372 | xfs_trans_t *tp, /* transaction pointer */ | |
373 | xfs_inode_t *ip, /* incore inode pointer */ | |
374 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
375 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
376 | int *flags) /* inode logging flags */ | |
377 | { | |
378 | xfs_btree_cur_t *cur; /* btree cursor */ | |
379 | int error; /* error return value */ | |
380 | xfs_mount_t *mp; /* file system mount struct */ | |
381 | int stat; /* newroot status */ | |
382 | ||
383 | mp = ip->i_mount; | |
384 | if (ip->i_df.if_broot_bytes <= XFS_IFORK_DSIZE(ip)) | |
385 | *flags |= XFS_ILOG_DBROOT; | |
386 | else { | |
561f7d17 | 387 | cur = xfs_bmbt_init_cursor(mp, tp, ip, XFS_DATA_FORK); |
1da177e4 LT |
388 | cur->bc_private.b.flist = flist; |
389 | cur->bc_private.b.firstblock = *firstblock; | |
390 | if ((error = xfs_bmbt_lookup_ge(cur, 0, 0, 0, &stat))) | |
391 | goto error0; | |
6bd8fc8a LM |
392 | /* must be at least one entry */ |
393 | XFS_WANT_CORRUPTED_GOTO(stat == 1, error0); | |
ea77b0a6 | 394 | if ((error = xfs_btree_new_iroot(cur, flags, &stat))) |
1da177e4 LT |
395 | goto error0; |
396 | if (stat == 0) { | |
397 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
398 | return XFS_ERROR(ENOSPC); | |
399 | } | |
400 | *firstblock = cur->bc_private.b.firstblock; | |
401 | cur->bc_private.b.allocated = 0; | |
402 | xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR); | |
403 | } | |
404 | return 0; | |
405 | error0: | |
406 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
407 | return error; | |
408 | } | |
409 | ||
410 | /* | |
411 | * Called from xfs_bmap_add_attrfork to handle extents format files. | |
412 | */ | |
413 | STATIC int /* error */ | |
414 | xfs_bmap_add_attrfork_extents( | |
415 | xfs_trans_t *tp, /* transaction pointer */ | |
416 | xfs_inode_t *ip, /* incore inode pointer */ | |
417 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
418 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
419 | int *flags) /* inode logging flags */ | |
420 | { | |
421 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
422 | int error; /* error return value */ | |
423 | ||
424 | if (ip->i_d.di_nextents * sizeof(xfs_bmbt_rec_t) <= XFS_IFORK_DSIZE(ip)) | |
425 | return 0; | |
426 | cur = NULL; | |
427 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, &cur, 0, | |
428 | flags, XFS_DATA_FORK); | |
429 | if (cur) { | |
430 | cur->bc_private.b.allocated = 0; | |
431 | xfs_btree_del_cursor(cur, | |
432 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
433 | } | |
434 | return error; | |
435 | } | |
436 | ||
437 | /* | |
438 | * Called from xfs_bmap_add_attrfork to handle local format files. | |
439 | */ | |
440 | STATIC int /* error */ | |
441 | xfs_bmap_add_attrfork_local( | |
442 | xfs_trans_t *tp, /* transaction pointer */ | |
443 | xfs_inode_t *ip, /* incore inode pointer */ | |
444 | xfs_fsblock_t *firstblock, /* first block allocated */ | |
445 | xfs_bmap_free_t *flist, /* blocks to free at commit */ | |
446 | int *flags) /* inode logging flags */ | |
447 | { | |
448 | xfs_da_args_t dargs; /* args for dir/attr code */ | |
449 | int error; /* error return value */ | |
450 | xfs_mount_t *mp; /* mount structure pointer */ | |
451 | ||
452 | if (ip->i_df.if_bytes <= XFS_IFORK_DSIZE(ip)) | |
453 | return 0; | |
454 | if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) { | |
455 | mp = ip->i_mount; | |
456 | memset(&dargs, 0, sizeof(dargs)); | |
457 | dargs.dp = ip; | |
458 | dargs.firstblock = firstblock; | |
459 | dargs.flist = flist; | |
460 | dargs.total = mp->m_dirblkfsbs; | |
461 | dargs.whichfork = XFS_DATA_FORK; | |
462 | dargs.trans = tp; | |
f6c2d1fa | 463 | error = xfs_dir2_sf_to_block(&dargs); |
1da177e4 LT |
464 | } else |
465 | error = xfs_bmap_local_to_extents(tp, ip, firstblock, 1, flags, | |
466 | XFS_DATA_FORK); | |
467 | return error; | |
468 | } | |
469 | ||
470 | /* | |
4eea22f0 | 471 | * Called by xfs_bmapi to update file extent records and the btree |
1da177e4 LT |
472 | * after allocating space (or doing a delayed allocation). |
473 | */ | |
474 | STATIC int /* error */ | |
475 | xfs_bmap_add_extent( | |
476 | xfs_inode_t *ip, /* incore inode pointer */ | |
477 | xfs_extnum_t idx, /* extent number to update/insert */ | |
478 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
4eea22f0 | 479 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
1da177e4 LT |
480 | xfs_fsblock_t *first, /* pointer to firstblock variable */ |
481 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
482 | int *logflagsp, /* inode logging flags */ | |
483 | int whichfork, /* data or attr fork */ | |
484 | int rsvd) /* OK to use reserved data blocks */ | |
485 | { | |
486 | xfs_btree_cur_t *cur; /* btree cursor or null */ | |
487 | xfs_filblks_t da_new; /* new count del alloc blocks used */ | |
488 | xfs_filblks_t da_old; /* old count del alloc blocks used */ | |
489 | int error; /* error return value */ | |
1da177e4 LT |
490 | xfs_ifork_t *ifp; /* inode fork ptr */ |
491 | int logflags; /* returned value */ | |
492 | xfs_extnum_t nextents; /* number of extents in file now */ | |
493 | ||
494 | XFS_STATS_INC(xs_add_exlist); | |
495 | cur = *curp; | |
496 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
497 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
498 | ASSERT(idx <= nextents); | |
499 | da_old = da_new = 0; | |
500 | error = 0; | |
501 | /* | |
502 | * This is the first extent added to a new/empty file. | |
503 | * Special case this one, so other routines get to assume there are | |
504 | * already extents in the list. | |
505 | */ | |
506 | if (nextents == 0) { | |
6ef35544 CH |
507 | xfs_iext_insert(ip, 0, 1, new, |
508 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0); | |
509 | ||
1da177e4 LT |
510 | ASSERT(cur == NULL); |
511 | ifp->if_lastex = 0; | |
9d87c319 | 512 | if (!isnullstartblock(new->br_startblock)) { |
1da177e4 | 513 | XFS_IFORK_NEXT_SET(ip, whichfork, 1); |
9d87c319 | 514 | logflags = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); |
1da177e4 LT |
515 | } else |
516 | logflags = 0; | |
517 | } | |
518 | /* | |
519 | * Any kind of new delayed allocation goes here. | |
520 | */ | |
9d87c319 | 521 | else if (isnullstartblock(new->br_startblock)) { |
1da177e4 LT |
522 | if (cur) |
523 | ASSERT((cur->bc_private.b.flags & | |
524 | XFS_BTCUR_BPRV_WASDEL) == 0); | |
e9ed9d22 | 525 | if ((error = xfs_bmap_add_extent_hole_delay(ip, idx, new, |
b4e9181e | 526 | &logflags, rsvd))) |
1da177e4 LT |
527 | goto done; |
528 | } | |
529 | /* | |
530 | * Real allocation off the end of the file. | |
531 | */ | |
532 | else if (idx == nextents) { | |
533 | if (cur) | |
534 | ASSERT((cur->bc_private.b.flags & | |
535 | XFS_BTCUR_BPRV_WASDEL) == 0); | |
536 | if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur, new, | |
b4e9181e | 537 | &logflags, whichfork))) |
1da177e4 LT |
538 | goto done; |
539 | } else { | |
540 | xfs_bmbt_irec_t prev; /* old extent at offset idx */ | |
541 | ||
542 | /* | |
543 | * Get the record referred to by idx. | |
544 | */ | |
4eea22f0 | 545 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx), &prev); |
1da177e4 LT |
546 | /* |
547 | * If it's a real allocation record, and the new allocation ends | |
548 | * after the start of the referred to record, then we're filling | |
549 | * in a delayed or unwritten allocation with a real one, or | |
550 | * converting real back to unwritten. | |
551 | */ | |
9d87c319 | 552 | if (!isnullstartblock(new->br_startblock) && |
1da177e4 LT |
553 | new->br_startoff + new->br_blockcount > prev.br_startoff) { |
554 | if (prev.br_state != XFS_EXT_UNWRITTEN && | |
9d87c319 ES |
555 | isnullstartblock(prev.br_startblock)) { |
556 | da_old = startblockval(prev.br_startblock); | |
1da177e4 LT |
557 | if (cur) |
558 | ASSERT(cur->bc_private.b.flags & | |
559 | XFS_BTCUR_BPRV_WASDEL); | |
560 | if ((error = xfs_bmap_add_extent_delay_real(ip, | |
561 | idx, &cur, new, &da_new, first, flist, | |
b4e9181e | 562 | &logflags, rsvd))) |
1da177e4 LT |
563 | goto done; |
564 | } else if (new->br_state == XFS_EXT_NORM) { | |
565 | ASSERT(new->br_state == XFS_EXT_NORM); | |
566 | if ((error = xfs_bmap_add_extent_unwritten_real( | |
b4e9181e | 567 | ip, idx, &cur, new, &logflags))) |
1da177e4 LT |
568 | goto done; |
569 | } else { | |
570 | ASSERT(new->br_state == XFS_EXT_UNWRITTEN); | |
571 | if ((error = xfs_bmap_add_extent_unwritten_real( | |
b4e9181e | 572 | ip, idx, &cur, new, &logflags))) |
1da177e4 LT |
573 | goto done; |
574 | } | |
575 | ASSERT(*curp == cur || *curp == NULL); | |
576 | } | |
577 | /* | |
578 | * Otherwise we're filling in a hole with an allocation. | |
579 | */ | |
580 | else { | |
581 | if (cur) | |
582 | ASSERT((cur->bc_private.b.flags & | |
583 | XFS_BTCUR_BPRV_WASDEL) == 0); | |
584 | if ((error = xfs_bmap_add_extent_hole_real(ip, idx, cur, | |
b4e9181e | 585 | new, &logflags, whichfork))) |
1da177e4 LT |
586 | goto done; |
587 | } | |
588 | } | |
589 | ||
590 | ASSERT(*curp == cur || *curp == NULL); | |
591 | /* | |
592 | * Convert to a btree if necessary. | |
593 | */ | |
594 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && | |
595 | XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) { | |
596 | int tmp_logflags; /* partial log flag return val */ | |
597 | ||
598 | ASSERT(cur == NULL); | |
599 | error = xfs_bmap_extents_to_btree(ip->i_transp, ip, first, | |
600 | flist, &cur, da_old > 0, &tmp_logflags, whichfork); | |
601 | logflags |= tmp_logflags; | |
602 | if (error) | |
603 | goto done; | |
604 | } | |
605 | /* | |
606 | * Adjust for changes in reserved delayed indirect blocks. | |
607 | * Nothing to do for disk quotas here. | |
608 | */ | |
609 | if (da_old || da_new) { | |
610 | xfs_filblks_t nblks; | |
611 | ||
612 | nblks = da_new; | |
613 | if (cur) | |
614 | nblks += cur->bc_private.b.allocated; | |
615 | ASSERT(nblks <= da_old); | |
616 | if (nblks < da_old) | |
96540c78 | 617 | xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 618 | (int64_t)(da_old - nblks), rsvd); |
1da177e4 LT |
619 | } |
620 | /* | |
621 | * Clear out the allocated field, done with it now in any case. | |
622 | */ | |
623 | if (cur) { | |
624 | cur->bc_private.b.allocated = 0; | |
625 | *curp = cur; | |
626 | } | |
627 | done: | |
628 | #ifdef DEBUG | |
629 | if (!error) | |
630 | xfs_bmap_check_leaf_extents(*curp, ip, whichfork); | |
631 | #endif | |
632 | *logflagsp = logflags; | |
633 | return error; | |
634 | } | |
635 | ||
636 | /* | |
637 | * Called by xfs_bmap_add_extent to handle cases converting a delayed | |
638 | * allocation to a real allocation. | |
639 | */ | |
640 | STATIC int /* error */ | |
641 | xfs_bmap_add_extent_delay_real( | |
642 | xfs_inode_t *ip, /* incore inode pointer */ | |
643 | xfs_extnum_t idx, /* extent number to update/insert */ | |
644 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
4eea22f0 | 645 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
1da177e4 LT |
646 | xfs_filblks_t *dnew, /* new delayed-alloc indirect blocks */ |
647 | xfs_fsblock_t *first, /* pointer to firstblock variable */ | |
648 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
649 | int *logflagsp, /* inode logging flags */ | |
650 | int rsvd) /* OK to use reserved data block allocation */ | |
651 | { | |
1da177e4 LT |
652 | xfs_btree_cur_t *cur; /* btree cursor */ |
653 | int diff; /* temp value */ | |
a6f64d4a | 654 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ |
1da177e4 | 655 | int error; /* error return value */ |
1da177e4 | 656 | int i; /* temp state */ |
4eea22f0 | 657 | xfs_ifork_t *ifp; /* inode fork pointer */ |
1da177e4 LT |
658 | xfs_fileoff_t new_endoff; /* end offset of new entry */ |
659 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
660 | /* left is 0, right is 1, prev is 2 */ | |
661 | int rval=0; /* return value (logging flags) */ | |
662 | int state = 0;/* state bits, accessed thru macros */ | |
3e57ecf6 OW |
663 | xfs_filblks_t temp=0; /* value for dnew calculations */ |
664 | xfs_filblks_t temp2=0;/* value for dnew calculations */ | |
1da177e4 | 665 | int tmp_rval; /* partial logging flags */ |
1da177e4 LT |
666 | |
667 | #define LEFT r[0] | |
668 | #define RIGHT r[1] | |
669 | #define PREV r[2] | |
1da177e4 LT |
670 | |
671 | /* | |
672 | * Set up a bunch of variables to make the tests simpler. | |
673 | */ | |
674 | cur = *curp; | |
4eea22f0 MK |
675 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
676 | ep = xfs_iext_get_ext(ifp, idx); | |
1da177e4 LT |
677 | xfs_bmbt_get_all(ep, &PREV); |
678 | new_endoff = new->br_startoff + new->br_blockcount; | |
679 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
680 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
7574aa92 | 681 | |
1da177e4 LT |
682 | /* |
683 | * Set flags determining what part of the previous delayed allocation | |
684 | * extent is being replaced by a real allocation. | |
685 | */ | |
7574aa92 CH |
686 | if (PREV.br_startoff == new->br_startoff) |
687 | state |= BMAP_LEFT_FILLING; | |
688 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
689 | state |= BMAP_RIGHT_FILLING; | |
690 | ||
1da177e4 LT |
691 | /* |
692 | * Check and set flags if this segment has a left neighbor. | |
693 | * Don't set contiguous if the combined extent would be too large. | |
694 | */ | |
7574aa92 CH |
695 | if (idx > 0) { |
696 | state |= BMAP_LEFT_VALID; | |
4eea22f0 | 697 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT); |
7574aa92 CH |
698 | |
699 | if (isnullstartblock(LEFT.br_startblock)) | |
700 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 701 | } |
7574aa92 CH |
702 | |
703 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
704 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
705 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
706 | LEFT.br_state == new->br_state && | |
707 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
708 | state |= BMAP_LEFT_CONTIG; | |
709 | ||
1da177e4 LT |
710 | /* |
711 | * Check and set flags if this segment has a right neighbor. | |
712 | * Don't set contiguous if the combined extent would be too large. | |
713 | * Also check for all-three-contiguous being too large. | |
714 | */ | |
7574aa92 CH |
715 | if (idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) { |
716 | state |= BMAP_RIGHT_VALID; | |
4eea22f0 | 717 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT); |
7574aa92 CH |
718 | |
719 | if (isnullstartblock(RIGHT.br_startblock)) | |
720 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 721 | } |
7574aa92 CH |
722 | |
723 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && | |
724 | new_endoff == RIGHT.br_startoff && | |
725 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
726 | new->br_state == RIGHT.br_state && | |
727 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
728 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
729 | BMAP_RIGHT_FILLING)) != | |
730 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
731 | BMAP_RIGHT_FILLING) || | |
732 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
733 | <= MAXEXTLEN)) | |
734 | state |= BMAP_RIGHT_CONTIG; | |
735 | ||
1da177e4 LT |
736 | error = 0; |
737 | /* | |
738 | * Switch out based on the FILLING and CONTIG state bits. | |
739 | */ | |
7574aa92 CH |
740 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
741 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
742 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
743 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
1da177e4 LT |
744 | /* |
745 | * Filling in all of a previously delayed allocation extent. | |
746 | * The left and right neighbors are both contiguous with new. | |
747 | */ | |
0b1b213f | 748 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); |
4eea22f0 | 749 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
1da177e4 LT |
750 | LEFT.br_blockcount + PREV.br_blockcount + |
751 | RIGHT.br_blockcount); | |
0b1b213f CH |
752 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
753 | ||
6ef35544 | 754 | xfs_iext_remove(ip, idx, 2, state); |
1da177e4 LT |
755 | ip->i_df.if_lastex = idx - 1; |
756 | ip->i_d.di_nextents--; | |
757 | if (cur == NULL) | |
758 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
759 | else { | |
760 | rval = XFS_ILOG_CORE; | |
761 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
762 | RIGHT.br_startblock, | |
763 | RIGHT.br_blockcount, &i))) | |
764 | goto done; | |
6bd8fc8a | 765 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
91cca5df | 766 | if ((error = xfs_btree_delete(cur, &i))) |
1da177e4 | 767 | goto done; |
6bd8fc8a | 768 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
8df4da4a | 769 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
1da177e4 | 770 | goto done; |
6bd8fc8a | 771 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
772 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
773 | LEFT.br_startblock, | |
774 | LEFT.br_blockcount + | |
775 | PREV.br_blockcount + | |
776 | RIGHT.br_blockcount, LEFT.br_state))) | |
777 | goto done; | |
778 | } | |
779 | *dnew = 0; | |
780 | break; | |
781 | ||
7574aa92 | 782 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: |
1da177e4 LT |
783 | /* |
784 | * Filling in all of a previously delayed allocation extent. | |
785 | * The left neighbor is contiguous, the right is not. | |
786 | */ | |
0b1b213f | 787 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); |
4eea22f0 | 788 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
1da177e4 | 789 | LEFT.br_blockcount + PREV.br_blockcount); |
0b1b213f CH |
790 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
791 | ||
1da177e4 | 792 | ip->i_df.if_lastex = idx - 1; |
6ef35544 | 793 | xfs_iext_remove(ip, idx, 1, state); |
1da177e4 LT |
794 | if (cur == NULL) |
795 | rval = XFS_ILOG_DEXT; | |
796 | else { | |
797 | rval = 0; | |
798 | if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff, | |
799 | LEFT.br_startblock, LEFT.br_blockcount, | |
800 | &i))) | |
801 | goto done; | |
6bd8fc8a | 802 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
803 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
804 | LEFT.br_startblock, | |
805 | LEFT.br_blockcount + | |
806 | PREV.br_blockcount, LEFT.br_state))) | |
807 | goto done; | |
808 | } | |
809 | *dnew = 0; | |
810 | break; | |
811 | ||
7574aa92 | 812 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 LT |
813 | /* |
814 | * Filling in all of a previously delayed allocation extent. | |
815 | * The right neighbor is contiguous, the left is not. | |
816 | */ | |
0b1b213f | 817 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
818 | xfs_bmbt_set_startblock(ep, new->br_startblock); |
819 | xfs_bmbt_set_blockcount(ep, | |
820 | PREV.br_blockcount + RIGHT.br_blockcount); | |
0b1b213f CH |
821 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
822 | ||
1da177e4 | 823 | ip->i_df.if_lastex = idx; |
6ef35544 | 824 | xfs_iext_remove(ip, idx + 1, 1, state); |
1da177e4 LT |
825 | if (cur == NULL) |
826 | rval = XFS_ILOG_DEXT; | |
827 | else { | |
828 | rval = 0; | |
829 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
830 | RIGHT.br_startblock, | |
831 | RIGHT.br_blockcount, &i))) | |
832 | goto done; | |
6bd8fc8a | 833 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
834 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
835 | new->br_startblock, | |
836 | PREV.br_blockcount + | |
837 | RIGHT.br_blockcount, PREV.br_state))) | |
838 | goto done; | |
839 | } | |
840 | *dnew = 0; | |
841 | break; | |
842 | ||
7574aa92 | 843 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: |
1da177e4 LT |
844 | /* |
845 | * Filling in all of a previously delayed allocation extent. | |
846 | * Neither the left nor right neighbors are contiguous with | |
847 | * the new one. | |
848 | */ | |
0b1b213f | 849 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 | 850 | xfs_bmbt_set_startblock(ep, new->br_startblock); |
0b1b213f CH |
851 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
852 | ||
1da177e4 LT |
853 | ip->i_df.if_lastex = idx; |
854 | ip->i_d.di_nextents++; | |
855 | if (cur == NULL) | |
856 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
857 | else { | |
858 | rval = XFS_ILOG_CORE; | |
859 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
860 | new->br_startblock, new->br_blockcount, | |
861 | &i))) | |
862 | goto done; | |
6bd8fc8a | 863 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); |
1da177e4 | 864 | cur->bc_rec.b.br_state = XFS_EXT_NORM; |
4b22a571 | 865 | if ((error = xfs_btree_insert(cur, &i))) |
1da177e4 | 866 | goto done; |
6bd8fc8a | 867 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
868 | } |
869 | *dnew = 0; | |
870 | break; | |
871 | ||
7574aa92 | 872 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
1da177e4 LT |
873 | /* |
874 | * Filling in the first part of a previous delayed allocation. | |
875 | * The left neighbor is contiguous. | |
876 | */ | |
0b1b213f | 877 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); |
4eea22f0 | 878 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
1da177e4 LT |
879 | LEFT.br_blockcount + new->br_blockcount); |
880 | xfs_bmbt_set_startoff(ep, | |
881 | PREV.br_startoff + new->br_blockcount); | |
0b1b213f CH |
882 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
883 | ||
1da177e4 | 884 | temp = PREV.br_blockcount - new->br_blockcount; |
0b1b213f | 885 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
886 | xfs_bmbt_set_blockcount(ep, temp); |
887 | ip->i_df.if_lastex = idx - 1; | |
888 | if (cur == NULL) | |
889 | rval = XFS_ILOG_DEXT; | |
890 | else { | |
891 | rval = 0; | |
892 | if ((error = xfs_bmbt_lookup_eq(cur, LEFT.br_startoff, | |
893 | LEFT.br_startblock, LEFT.br_blockcount, | |
894 | &i))) | |
895 | goto done; | |
6bd8fc8a | 896 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
897 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
898 | LEFT.br_startblock, | |
899 | LEFT.br_blockcount + | |
900 | new->br_blockcount, | |
901 | LEFT.br_state))) | |
902 | goto done; | |
903 | } | |
904 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
9d87c319 ES |
905 | startblockval(PREV.br_startblock)); |
906 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
0b1b213f | 907 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
908 | *dnew = temp; |
909 | break; | |
910 | ||
7574aa92 | 911 | case BMAP_LEFT_FILLING: |
1da177e4 LT |
912 | /* |
913 | * Filling in the first part of a previous delayed allocation. | |
914 | * The left neighbor is not contiguous. | |
915 | */ | |
0b1b213f | 916 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
917 | xfs_bmbt_set_startoff(ep, new_endoff); |
918 | temp = PREV.br_blockcount - new->br_blockcount; | |
919 | xfs_bmbt_set_blockcount(ep, temp); | |
6ef35544 | 920 | xfs_iext_insert(ip, idx, 1, new, state); |
1da177e4 LT |
921 | ip->i_df.if_lastex = idx; |
922 | ip->i_d.di_nextents++; | |
923 | if (cur == NULL) | |
924 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
925 | else { | |
926 | rval = XFS_ILOG_CORE; | |
927 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
928 | new->br_startblock, new->br_blockcount, | |
929 | &i))) | |
930 | goto done; | |
6bd8fc8a | 931 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); |
1da177e4 | 932 | cur->bc_rec.b.br_state = XFS_EXT_NORM; |
4b22a571 | 933 | if ((error = xfs_btree_insert(cur, &i))) |
1da177e4 | 934 | goto done; |
6bd8fc8a | 935 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
936 | } |
937 | if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && | |
938 | ip->i_d.di_nextents > ip->i_df.if_ext_max) { | |
939 | error = xfs_bmap_extents_to_btree(ip->i_transp, ip, | |
940 | first, flist, &cur, 1, &tmp_rval, | |
941 | XFS_DATA_FORK); | |
942 | rval |= tmp_rval; | |
943 | if (error) | |
944 | goto done; | |
945 | } | |
946 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
9d87c319 | 947 | startblockval(PREV.br_startblock) - |
1da177e4 | 948 | (cur ? cur->bc_private.b.allocated : 0)); |
4eea22f0 | 949 | ep = xfs_iext_get_ext(ifp, idx + 1); |
9d87c319 | 950 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); |
0b1b213f | 951 | trace_xfs_bmap_post_update(ip, idx + 1, state, _THIS_IP_); |
1da177e4 LT |
952 | *dnew = temp; |
953 | break; | |
954 | ||
7574aa92 | 955 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 LT |
956 | /* |
957 | * Filling in the last part of a previous delayed allocation. | |
958 | * The right neighbor is contiguous with the new allocation. | |
959 | */ | |
960 | temp = PREV.br_blockcount - new->br_blockcount; | |
0b1b213f CH |
961 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
962 | trace_xfs_bmap_pre_update(ip, idx + 1, state, _THIS_IP_); | |
1da177e4 | 963 | xfs_bmbt_set_blockcount(ep, temp); |
4eea22f0 MK |
964 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1), |
965 | new->br_startoff, new->br_startblock, | |
1da177e4 LT |
966 | new->br_blockcount + RIGHT.br_blockcount, |
967 | RIGHT.br_state); | |
0b1b213f | 968 | trace_xfs_bmap_post_update(ip, idx + 1, state, _THIS_IP_); |
1da177e4 LT |
969 | ip->i_df.if_lastex = idx + 1; |
970 | if (cur == NULL) | |
971 | rval = XFS_ILOG_DEXT; | |
972 | else { | |
973 | rval = 0; | |
974 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
975 | RIGHT.br_startblock, | |
976 | RIGHT.br_blockcount, &i))) | |
977 | goto done; | |
6bd8fc8a | 978 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
979 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
980 | new->br_startblock, | |
981 | new->br_blockcount + | |
982 | RIGHT.br_blockcount, | |
983 | RIGHT.br_state))) | |
984 | goto done; | |
985 | } | |
986 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
9d87c319 ES |
987 | startblockval(PREV.br_startblock)); |
988 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); | |
0b1b213f | 989 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
990 | *dnew = temp; |
991 | break; | |
992 | ||
7574aa92 | 993 | case BMAP_RIGHT_FILLING: |
1da177e4 LT |
994 | /* |
995 | * Filling in the last part of a previous delayed allocation. | |
996 | * The right neighbor is not contiguous. | |
997 | */ | |
998 | temp = PREV.br_blockcount - new->br_blockcount; | |
0b1b213f | 999 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 | 1000 | xfs_bmbt_set_blockcount(ep, temp); |
6ef35544 | 1001 | xfs_iext_insert(ip, idx + 1, 1, new, state); |
1da177e4 LT |
1002 | ip->i_df.if_lastex = idx + 1; |
1003 | ip->i_d.di_nextents++; | |
1004 | if (cur == NULL) | |
1005 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1006 | else { | |
1007 | rval = XFS_ILOG_CORE; | |
1008 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
1009 | new->br_startblock, new->br_blockcount, | |
1010 | &i))) | |
1011 | goto done; | |
6bd8fc8a | 1012 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); |
1da177e4 | 1013 | cur->bc_rec.b.br_state = XFS_EXT_NORM; |
4b22a571 | 1014 | if ((error = xfs_btree_insert(cur, &i))) |
1da177e4 | 1015 | goto done; |
6bd8fc8a | 1016 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1017 | } |
1018 | if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && | |
1019 | ip->i_d.di_nextents > ip->i_df.if_ext_max) { | |
1020 | error = xfs_bmap_extents_to_btree(ip->i_transp, ip, | |
1021 | first, flist, &cur, 1, &tmp_rval, | |
1022 | XFS_DATA_FORK); | |
1023 | rval |= tmp_rval; | |
1024 | if (error) | |
1025 | goto done; | |
1026 | } | |
1027 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
9d87c319 | 1028 | startblockval(PREV.br_startblock) - |
1da177e4 | 1029 | (cur ? cur->bc_private.b.allocated : 0)); |
4eea22f0 | 1030 | ep = xfs_iext_get_ext(ifp, idx); |
9d87c319 | 1031 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); |
0b1b213f | 1032 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
1033 | *dnew = temp; |
1034 | break; | |
1035 | ||
1036 | case 0: | |
1037 | /* | |
1038 | * Filling in the middle part of a previous delayed allocation. | |
1039 | * Contiguity is impossible here. | |
1040 | * This case is avoided almost all the time. | |
1041 | */ | |
1042 | temp = new->br_startoff - PREV.br_startoff; | |
0b1b213f | 1043 | trace_xfs_bmap_pre_update(ip, idx, 0, _THIS_IP_); |
1da177e4 LT |
1044 | xfs_bmbt_set_blockcount(ep, temp); |
1045 | r[0] = *new; | |
d2133717 LM |
1046 | r[1].br_state = PREV.br_state; |
1047 | r[1].br_startblock = 0; | |
1da177e4 LT |
1048 | r[1].br_startoff = new_endoff; |
1049 | temp2 = PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
1050 | r[1].br_blockcount = temp2; | |
6ef35544 | 1051 | xfs_iext_insert(ip, idx + 1, 2, &r[0], state); |
1da177e4 LT |
1052 | ip->i_df.if_lastex = idx + 1; |
1053 | ip->i_d.di_nextents++; | |
1054 | if (cur == NULL) | |
1055 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1056 | else { | |
1057 | rval = XFS_ILOG_CORE; | |
1058 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
1059 | new->br_startblock, new->br_blockcount, | |
1060 | &i))) | |
1061 | goto done; | |
6bd8fc8a | 1062 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); |
1da177e4 | 1063 | cur->bc_rec.b.br_state = XFS_EXT_NORM; |
4b22a571 | 1064 | if ((error = xfs_btree_insert(cur, &i))) |
1da177e4 | 1065 | goto done; |
6bd8fc8a | 1066 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1067 | } |
1068 | if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && | |
1069 | ip->i_d.di_nextents > ip->i_df.if_ext_max) { | |
1070 | error = xfs_bmap_extents_to_btree(ip->i_transp, ip, | |
1071 | first, flist, &cur, 1, &tmp_rval, | |
1072 | XFS_DATA_FORK); | |
1073 | rval |= tmp_rval; | |
1074 | if (error) | |
1075 | goto done; | |
1076 | } | |
1077 | temp = xfs_bmap_worst_indlen(ip, temp); | |
1078 | temp2 = xfs_bmap_worst_indlen(ip, temp2); | |
9d87c319 | 1079 | diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) - |
1da177e4 LT |
1080 | (cur ? cur->bc_private.b.allocated : 0)); |
1081 | if (diff > 0 && | |
96540c78 CH |
1082 | xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, |
1083 | -((int64_t)diff), rsvd)) { | |
1da177e4 LT |
1084 | /* |
1085 | * Ick gross gag me with a spoon. | |
1086 | */ | |
1087 | ASSERT(0); /* want to see if this ever happens! */ | |
1088 | while (diff > 0) { | |
1089 | if (temp) { | |
1090 | temp--; | |
1091 | diff--; | |
1092 | if (!diff || | |
96540c78 CH |
1093 | !xfs_icsb_modify_counters(ip->i_mount, |
1094 | XFS_SBS_FDBLOCKS, | |
1095 | -((int64_t)diff), rsvd)) | |
1da177e4 LT |
1096 | break; |
1097 | } | |
1098 | if (temp2) { | |
1099 | temp2--; | |
1100 | diff--; | |
1101 | if (!diff || | |
96540c78 CH |
1102 | !xfs_icsb_modify_counters(ip->i_mount, |
1103 | XFS_SBS_FDBLOCKS, | |
1104 | -((int64_t)diff), rsvd)) | |
1da177e4 LT |
1105 | break; |
1106 | } | |
1107 | } | |
1108 | } | |
4eea22f0 | 1109 | ep = xfs_iext_get_ext(ifp, idx); |
9d87c319 | 1110 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); |
0b1b213f CH |
1111 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1112 | trace_xfs_bmap_pre_update(ip, idx + 2, state, _THIS_IP_); | |
4eea22f0 | 1113 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx + 2), |
9d87c319 | 1114 | nullstartblock((int)temp2)); |
0b1b213f | 1115 | trace_xfs_bmap_post_update(ip, idx + 2, state, _THIS_IP_); |
1da177e4 LT |
1116 | *dnew = temp + temp2; |
1117 | break; | |
1118 | ||
7574aa92 CH |
1119 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: |
1120 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
1121 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
1122 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
1123 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
1124 | case BMAP_LEFT_CONTIG: | |
1125 | case BMAP_RIGHT_CONTIG: | |
1da177e4 LT |
1126 | /* |
1127 | * These cases are all impossible. | |
1128 | */ | |
1129 | ASSERT(0); | |
1130 | } | |
1131 | *curp = cur; | |
1132 | done: | |
1133 | *logflagsp = rval; | |
1134 | return error; | |
1135 | #undef LEFT | |
1136 | #undef RIGHT | |
1137 | #undef PREV | |
1da177e4 LT |
1138 | } |
1139 | ||
1140 | /* | |
1141 | * Called by xfs_bmap_add_extent to handle cases converting an unwritten | |
1142 | * allocation to a real allocation or vice versa. | |
1143 | */ | |
1144 | STATIC int /* error */ | |
1145 | xfs_bmap_add_extent_unwritten_real( | |
1146 | xfs_inode_t *ip, /* incore inode pointer */ | |
1147 | xfs_extnum_t idx, /* extent number to update/insert */ | |
1148 | xfs_btree_cur_t **curp, /* if *curp is null, not a btree */ | |
4eea22f0 | 1149 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
b4e9181e | 1150 | int *logflagsp) /* inode logging flags */ |
1da177e4 | 1151 | { |
1da177e4 | 1152 | xfs_btree_cur_t *cur; /* btree cursor */ |
a6f64d4a | 1153 | xfs_bmbt_rec_host_t *ep; /* extent entry for idx */ |
1da177e4 | 1154 | int error; /* error return value */ |
1da177e4 | 1155 | int i; /* temp state */ |
4eea22f0 | 1156 | xfs_ifork_t *ifp; /* inode fork pointer */ |
1da177e4 LT |
1157 | xfs_fileoff_t new_endoff; /* end offset of new entry */ |
1158 | xfs_exntst_t newext; /* new extent state */ | |
1159 | xfs_exntst_t oldext; /* old extent state */ | |
1160 | xfs_bmbt_irec_t r[3]; /* neighbor extent entries */ | |
1161 | /* left is 0, right is 1, prev is 2 */ | |
1162 | int rval=0; /* return value (logging flags) */ | |
1163 | int state = 0;/* state bits, accessed thru macros */ | |
1da177e4 LT |
1164 | |
1165 | #define LEFT r[0] | |
1166 | #define RIGHT r[1] | |
1167 | #define PREV r[2] | |
1da177e4 LT |
1168 | /* |
1169 | * Set up a bunch of variables to make the tests simpler. | |
1170 | */ | |
1171 | error = 0; | |
1172 | cur = *curp; | |
4eea22f0 MK |
1173 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
1174 | ep = xfs_iext_get_ext(ifp, idx); | |
1da177e4 LT |
1175 | xfs_bmbt_get_all(ep, &PREV); |
1176 | newext = new->br_state; | |
1177 | oldext = (newext == XFS_EXT_UNWRITTEN) ? | |
1178 | XFS_EXT_NORM : XFS_EXT_UNWRITTEN; | |
1179 | ASSERT(PREV.br_state == oldext); | |
1180 | new_endoff = new->br_startoff + new->br_blockcount; | |
1181 | ASSERT(PREV.br_startoff <= new->br_startoff); | |
1182 | ASSERT(PREV.br_startoff + PREV.br_blockcount >= new_endoff); | |
7574aa92 | 1183 | |
1da177e4 LT |
1184 | /* |
1185 | * Set flags determining what part of the previous oldext allocation | |
1186 | * extent is being replaced by a newext allocation. | |
1187 | */ | |
7574aa92 CH |
1188 | if (PREV.br_startoff == new->br_startoff) |
1189 | state |= BMAP_LEFT_FILLING; | |
1190 | if (PREV.br_startoff + PREV.br_blockcount == new_endoff) | |
1191 | state |= BMAP_RIGHT_FILLING; | |
1192 | ||
1da177e4 LT |
1193 | /* |
1194 | * Check and set flags if this segment has a left neighbor. | |
1195 | * Don't set contiguous if the combined extent would be too large. | |
1196 | */ | |
7574aa92 CH |
1197 | if (idx > 0) { |
1198 | state |= BMAP_LEFT_VALID; | |
4eea22f0 | 1199 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &LEFT); |
7574aa92 CH |
1200 | |
1201 | if (isnullstartblock(LEFT.br_startblock)) | |
1202 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 1203 | } |
7574aa92 CH |
1204 | |
1205 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && | |
1206 | LEFT.br_startoff + LEFT.br_blockcount == new->br_startoff && | |
1207 | LEFT.br_startblock + LEFT.br_blockcount == new->br_startblock && | |
1208 | LEFT.br_state == newext && | |
1209 | LEFT.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
1210 | state |= BMAP_LEFT_CONTIG; | |
1211 | ||
1da177e4 LT |
1212 | /* |
1213 | * Check and set flags if this segment has a right neighbor. | |
1214 | * Don't set contiguous if the combined extent would be too large. | |
1215 | * Also check for all-three-contiguous being too large. | |
1216 | */ | |
7574aa92 CH |
1217 | if (idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) { |
1218 | state |= BMAP_RIGHT_VALID; | |
4eea22f0 | 1219 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx + 1), &RIGHT); |
7574aa92 CH |
1220 | if (isnullstartblock(RIGHT.br_startblock)) |
1221 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 1222 | } |
7574aa92 CH |
1223 | |
1224 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && | |
1225 | new_endoff == RIGHT.br_startoff && | |
1226 | new->br_startblock + new->br_blockcount == RIGHT.br_startblock && | |
1227 | newext == RIGHT.br_state && | |
1228 | new->br_blockcount + RIGHT.br_blockcount <= MAXEXTLEN && | |
1229 | ((state & (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1230 | BMAP_RIGHT_FILLING)) != | |
1231 | (BMAP_LEFT_CONTIG | BMAP_LEFT_FILLING | | |
1232 | BMAP_RIGHT_FILLING) || | |
1233 | LEFT.br_blockcount + new->br_blockcount + RIGHT.br_blockcount | |
1234 | <= MAXEXTLEN)) | |
1235 | state |= BMAP_RIGHT_CONTIG; | |
1236 | ||
1da177e4 LT |
1237 | /* |
1238 | * Switch out based on the FILLING and CONTIG state bits. | |
1239 | */ | |
7574aa92 CH |
1240 | switch (state & (BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | |
1241 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG)) { | |
1242 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | | |
1243 | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: | |
1da177e4 LT |
1244 | /* |
1245 | * Setting all of a previous oldext extent to newext. | |
1246 | * The left and right neighbors are both contiguous with new. | |
1247 | */ | |
0b1b213f | 1248 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); |
4eea22f0 | 1249 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
1da177e4 LT |
1250 | LEFT.br_blockcount + PREV.br_blockcount + |
1251 | RIGHT.br_blockcount); | |
0b1b213f CH |
1252 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
1253 | ||
6ef35544 | 1254 | xfs_iext_remove(ip, idx, 2, state); |
1da177e4 LT |
1255 | ip->i_df.if_lastex = idx - 1; |
1256 | ip->i_d.di_nextents -= 2; | |
1257 | if (cur == NULL) | |
1258 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1259 | else { | |
1260 | rval = XFS_ILOG_CORE; | |
1261 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
1262 | RIGHT.br_startblock, | |
1263 | RIGHT.br_blockcount, &i))) | |
1264 | goto done; | |
6bd8fc8a | 1265 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
91cca5df | 1266 | if ((error = xfs_btree_delete(cur, &i))) |
1da177e4 | 1267 | goto done; |
6bd8fc8a | 1268 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
8df4da4a | 1269 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
1da177e4 | 1270 | goto done; |
6bd8fc8a | 1271 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
91cca5df | 1272 | if ((error = xfs_btree_delete(cur, &i))) |
1da177e4 | 1273 | goto done; |
6bd8fc8a | 1274 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
8df4da4a | 1275 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
1da177e4 | 1276 | goto done; |
6bd8fc8a | 1277 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1278 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
1279 | LEFT.br_startblock, | |
1280 | LEFT.br_blockcount + PREV.br_blockcount + | |
1281 | RIGHT.br_blockcount, LEFT.br_state))) | |
1282 | goto done; | |
1283 | } | |
1284 | break; | |
1285 | ||
7574aa92 | 1286 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: |
1da177e4 LT |
1287 | /* |
1288 | * Setting all of a previous oldext extent to newext. | |
1289 | * The left neighbor is contiguous, the right is not. | |
1290 | */ | |
0b1b213f | 1291 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); |
4eea22f0 | 1292 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
1da177e4 | 1293 | LEFT.br_blockcount + PREV.br_blockcount); |
0b1b213f CH |
1294 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
1295 | ||
1da177e4 | 1296 | ip->i_df.if_lastex = idx - 1; |
6ef35544 | 1297 | xfs_iext_remove(ip, idx, 1, state); |
1da177e4 LT |
1298 | ip->i_d.di_nextents--; |
1299 | if (cur == NULL) | |
1300 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1301 | else { | |
1302 | rval = XFS_ILOG_CORE; | |
1303 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
1304 | PREV.br_startblock, PREV.br_blockcount, | |
1305 | &i))) | |
1306 | goto done; | |
6bd8fc8a | 1307 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
91cca5df | 1308 | if ((error = xfs_btree_delete(cur, &i))) |
1da177e4 | 1309 | goto done; |
6bd8fc8a | 1310 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
8df4da4a | 1311 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
1da177e4 | 1312 | goto done; |
6bd8fc8a | 1313 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1314 | if ((error = xfs_bmbt_update(cur, LEFT.br_startoff, |
1315 | LEFT.br_startblock, | |
1316 | LEFT.br_blockcount + PREV.br_blockcount, | |
1317 | LEFT.br_state))) | |
1318 | goto done; | |
1319 | } | |
1320 | break; | |
1321 | ||
7574aa92 | 1322 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 LT |
1323 | /* |
1324 | * Setting all of a previous oldext extent to newext. | |
1325 | * The right neighbor is contiguous, the left is not. | |
1326 | */ | |
0b1b213f | 1327 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
1328 | xfs_bmbt_set_blockcount(ep, |
1329 | PREV.br_blockcount + RIGHT.br_blockcount); | |
1330 | xfs_bmbt_set_state(ep, newext); | |
0b1b213f | 1331 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1da177e4 | 1332 | ip->i_df.if_lastex = idx; |
6ef35544 | 1333 | xfs_iext_remove(ip, idx + 1, 1, state); |
1da177e4 LT |
1334 | ip->i_d.di_nextents--; |
1335 | if (cur == NULL) | |
1336 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1337 | else { | |
1338 | rval = XFS_ILOG_CORE; | |
1339 | if ((error = xfs_bmbt_lookup_eq(cur, RIGHT.br_startoff, | |
1340 | RIGHT.br_startblock, | |
1341 | RIGHT.br_blockcount, &i))) | |
1342 | goto done; | |
6bd8fc8a | 1343 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
91cca5df | 1344 | if ((error = xfs_btree_delete(cur, &i))) |
1da177e4 | 1345 | goto done; |
6bd8fc8a | 1346 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
8df4da4a | 1347 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
1da177e4 | 1348 | goto done; |
6bd8fc8a | 1349 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1350 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
1351 | new->br_startblock, | |
1352 | new->br_blockcount + RIGHT.br_blockcount, | |
1353 | newext))) | |
1354 | goto done; | |
1355 | } | |
1356 | break; | |
1357 | ||
7574aa92 | 1358 | case BMAP_LEFT_FILLING | BMAP_RIGHT_FILLING: |
1da177e4 LT |
1359 | /* |
1360 | * Setting all of a previous oldext extent to newext. | |
1361 | * Neither the left nor right neighbors are contiguous with | |
1362 | * the new one. | |
1363 | */ | |
0b1b213f | 1364 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 | 1365 | xfs_bmbt_set_state(ep, newext); |
0b1b213f CH |
1366 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1367 | ||
1da177e4 LT |
1368 | ip->i_df.if_lastex = idx; |
1369 | if (cur == NULL) | |
1370 | rval = XFS_ILOG_DEXT; | |
1371 | else { | |
1372 | rval = 0; | |
1373 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
1374 | new->br_startblock, new->br_blockcount, | |
1375 | &i))) | |
1376 | goto done; | |
6bd8fc8a | 1377 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1378 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
1379 | new->br_startblock, new->br_blockcount, | |
1380 | newext))) | |
1381 | goto done; | |
1382 | } | |
1383 | break; | |
1384 | ||
7574aa92 | 1385 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG: |
1da177e4 LT |
1386 | /* |
1387 | * Setting the first part of a previous oldext extent to newext. | |
1388 | * The left neighbor is contiguous. | |
1389 | */ | |
0b1b213f | 1390 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); |
4eea22f0 | 1391 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
1da177e4 LT |
1392 | LEFT.br_blockcount + new->br_blockcount); |
1393 | xfs_bmbt_set_startoff(ep, | |
1394 | PREV.br_startoff + new->br_blockcount); | |
0b1b213f CH |
1395 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
1396 | ||
1397 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); | |
1da177e4 LT |
1398 | xfs_bmbt_set_startblock(ep, |
1399 | new->br_startblock + new->br_blockcount); | |
1400 | xfs_bmbt_set_blockcount(ep, | |
1401 | PREV.br_blockcount - new->br_blockcount); | |
0b1b213f CH |
1402 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1403 | ||
1da177e4 LT |
1404 | ip->i_df.if_lastex = idx - 1; |
1405 | if (cur == NULL) | |
1406 | rval = XFS_ILOG_DEXT; | |
1407 | else { | |
1408 | rval = 0; | |
1409 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
1410 | PREV.br_startblock, PREV.br_blockcount, | |
1411 | &i))) | |
1412 | goto done; | |
6bd8fc8a | 1413 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1414 | if ((error = xfs_bmbt_update(cur, |
1415 | PREV.br_startoff + new->br_blockcount, | |
1416 | PREV.br_startblock + new->br_blockcount, | |
1417 | PREV.br_blockcount - new->br_blockcount, | |
1418 | oldext))) | |
1419 | goto done; | |
8df4da4a | 1420 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
1da177e4 LT |
1421 | goto done; |
1422 | if (xfs_bmbt_update(cur, LEFT.br_startoff, | |
1423 | LEFT.br_startblock, | |
1424 | LEFT.br_blockcount + new->br_blockcount, | |
1425 | LEFT.br_state)) | |
1426 | goto done; | |
1427 | } | |
1428 | break; | |
1429 | ||
7574aa92 | 1430 | case BMAP_LEFT_FILLING: |
1da177e4 LT |
1431 | /* |
1432 | * Setting the first part of a previous oldext extent to newext. | |
1433 | * The left neighbor is not contiguous. | |
1434 | */ | |
0b1b213f | 1435 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
1436 | ASSERT(ep && xfs_bmbt_get_state(ep) == oldext); |
1437 | xfs_bmbt_set_startoff(ep, new_endoff); | |
1438 | xfs_bmbt_set_blockcount(ep, | |
1439 | PREV.br_blockcount - new->br_blockcount); | |
1440 | xfs_bmbt_set_startblock(ep, | |
1441 | new->br_startblock + new->br_blockcount); | |
0b1b213f CH |
1442 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1443 | ||
6ef35544 | 1444 | xfs_iext_insert(ip, idx, 1, new, state); |
1da177e4 LT |
1445 | ip->i_df.if_lastex = idx; |
1446 | ip->i_d.di_nextents++; | |
1447 | if (cur == NULL) | |
1448 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1449 | else { | |
1450 | rval = XFS_ILOG_CORE; | |
1451 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
1452 | PREV.br_startblock, PREV.br_blockcount, | |
1453 | &i))) | |
1454 | goto done; | |
6bd8fc8a | 1455 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1456 | if ((error = xfs_bmbt_update(cur, |
1457 | PREV.br_startoff + new->br_blockcount, | |
1458 | PREV.br_startblock + new->br_blockcount, | |
1459 | PREV.br_blockcount - new->br_blockcount, | |
1460 | oldext))) | |
1461 | goto done; | |
1462 | cur->bc_rec.b = *new; | |
4b22a571 | 1463 | if ((error = xfs_btree_insert(cur, &i))) |
1da177e4 | 1464 | goto done; |
6bd8fc8a | 1465 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1466 | } |
1467 | break; | |
1468 | ||
7574aa92 | 1469 | case BMAP_RIGHT_FILLING | BMAP_RIGHT_CONTIG: |
1da177e4 LT |
1470 | /* |
1471 | * Setting the last part of a previous oldext extent to newext. | |
1472 | * The right neighbor is contiguous with the new allocation. | |
1473 | */ | |
0b1b213f CH |
1474 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1475 | trace_xfs_bmap_pre_update(ip, idx + 1, state, _THIS_IP_); | |
1da177e4 LT |
1476 | xfs_bmbt_set_blockcount(ep, |
1477 | PREV.br_blockcount - new->br_blockcount); | |
0b1b213f | 1478 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
4eea22f0 MK |
1479 | xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, idx + 1), |
1480 | new->br_startoff, new->br_startblock, | |
1da177e4 | 1481 | new->br_blockcount + RIGHT.br_blockcount, newext); |
0b1b213f CH |
1482 | trace_xfs_bmap_post_update(ip, idx + 1, state, _THIS_IP_); |
1483 | ||
1da177e4 LT |
1484 | ip->i_df.if_lastex = idx + 1; |
1485 | if (cur == NULL) | |
1486 | rval = XFS_ILOG_DEXT; | |
1487 | else { | |
1488 | rval = 0; | |
1489 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
1490 | PREV.br_startblock, | |
1491 | PREV.br_blockcount, &i))) | |
1492 | goto done; | |
6bd8fc8a | 1493 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1494 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
1495 | PREV.br_startblock, | |
1496 | PREV.br_blockcount - new->br_blockcount, | |
1497 | oldext))) | |
1498 | goto done; | |
637aa50f | 1499 | if ((error = xfs_btree_increment(cur, 0, &i))) |
1da177e4 LT |
1500 | goto done; |
1501 | if ((error = xfs_bmbt_update(cur, new->br_startoff, | |
1502 | new->br_startblock, | |
1503 | new->br_blockcount + RIGHT.br_blockcount, | |
1504 | newext))) | |
1505 | goto done; | |
1506 | } | |
1507 | break; | |
1508 | ||
7574aa92 | 1509 | case BMAP_RIGHT_FILLING: |
1da177e4 LT |
1510 | /* |
1511 | * Setting the last part of a previous oldext extent to newext. | |
1512 | * The right neighbor is not contiguous. | |
1513 | */ | |
0b1b213f | 1514 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
1515 | xfs_bmbt_set_blockcount(ep, |
1516 | PREV.br_blockcount - new->br_blockcount); | |
0b1b213f CH |
1517 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1518 | ||
6ef35544 | 1519 | xfs_iext_insert(ip, idx + 1, 1, new, state); |
1da177e4 LT |
1520 | ip->i_df.if_lastex = idx + 1; |
1521 | ip->i_d.di_nextents++; | |
1522 | if (cur == NULL) | |
1523 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1524 | else { | |
1525 | rval = XFS_ILOG_CORE; | |
1526 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
1527 | PREV.br_startblock, PREV.br_blockcount, | |
1528 | &i))) | |
1529 | goto done; | |
6bd8fc8a | 1530 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1531 | if ((error = xfs_bmbt_update(cur, PREV.br_startoff, |
1532 | PREV.br_startblock, | |
1533 | PREV.br_blockcount - new->br_blockcount, | |
1534 | oldext))) | |
1535 | goto done; | |
1536 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
1537 | new->br_startblock, new->br_blockcount, | |
1538 | &i))) | |
1539 | goto done; | |
6bd8fc8a | 1540 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); |
1da177e4 | 1541 | cur->bc_rec.b.br_state = XFS_EXT_NORM; |
4b22a571 | 1542 | if ((error = xfs_btree_insert(cur, &i))) |
1da177e4 | 1543 | goto done; |
6bd8fc8a | 1544 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1545 | } |
1546 | break; | |
1547 | ||
1548 | case 0: | |
1549 | /* | |
1550 | * Setting the middle part of a previous oldext extent to | |
1551 | * newext. Contiguity is impossible here. | |
1552 | * One extent becomes three extents. | |
1553 | */ | |
0b1b213f | 1554 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
1555 | xfs_bmbt_set_blockcount(ep, |
1556 | new->br_startoff - PREV.br_startoff); | |
0b1b213f CH |
1557 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1558 | ||
1da177e4 LT |
1559 | r[0] = *new; |
1560 | r[1].br_startoff = new_endoff; | |
1561 | r[1].br_blockcount = | |
1562 | PREV.br_startoff + PREV.br_blockcount - new_endoff; | |
1563 | r[1].br_startblock = new->br_startblock + new->br_blockcount; | |
1564 | r[1].br_state = oldext; | |
6ef35544 | 1565 | xfs_iext_insert(ip, idx + 1, 2, &r[0], state); |
1da177e4 LT |
1566 | ip->i_df.if_lastex = idx + 1; |
1567 | ip->i_d.di_nextents += 2; | |
1568 | if (cur == NULL) | |
1569 | rval = XFS_ILOG_CORE | XFS_ILOG_DEXT; | |
1570 | else { | |
1571 | rval = XFS_ILOG_CORE; | |
1572 | if ((error = xfs_bmbt_lookup_eq(cur, PREV.br_startoff, | |
1573 | PREV.br_startblock, PREV.br_blockcount, | |
1574 | &i))) | |
1575 | goto done; | |
6bd8fc8a | 1576 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1577 | /* new right extent - oldext */ |
1578 | if ((error = xfs_bmbt_update(cur, r[1].br_startoff, | |
1579 | r[1].br_startblock, r[1].br_blockcount, | |
1580 | r[1].br_state))) | |
1581 | goto done; | |
1582 | /* new left extent - oldext */ | |
1da177e4 | 1583 | cur->bc_rec.b = PREV; |
6a617dd2 TS |
1584 | cur->bc_rec.b.br_blockcount = |
1585 | new->br_startoff - PREV.br_startoff; | |
4b22a571 | 1586 | if ((error = xfs_btree_insert(cur, &i))) |
1da177e4 | 1587 | goto done; |
6bd8fc8a | 1588 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
ddea2d52 LM |
1589 | /* |
1590 | * Reset the cursor to the position of the new extent | |
1591 | * we are about to insert as we can't trust it after | |
1592 | * the previous insert. | |
1593 | */ | |
1594 | if ((error = xfs_bmbt_lookup_eq(cur, new->br_startoff, | |
1595 | new->br_startblock, new->br_blockcount, | |
1596 | &i))) | |
1da177e4 | 1597 | goto done; |
ddea2d52 | 1598 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); |
1da177e4 | 1599 | /* new middle extent - newext */ |
ddea2d52 | 1600 | cur->bc_rec.b.br_state = new->br_state; |
4b22a571 | 1601 | if ((error = xfs_btree_insert(cur, &i))) |
1da177e4 | 1602 | goto done; |
6bd8fc8a | 1603 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
1604 | } |
1605 | break; | |
1606 | ||
7574aa92 CH |
1607 | case BMAP_LEFT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: |
1608 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
1609 | case BMAP_LEFT_FILLING | BMAP_RIGHT_CONTIG: | |
1610 | case BMAP_RIGHT_FILLING | BMAP_LEFT_CONTIG: | |
1611 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
1612 | case BMAP_LEFT_CONTIG: | |
1613 | case BMAP_RIGHT_CONTIG: | |
1da177e4 LT |
1614 | /* |
1615 | * These cases are all impossible. | |
1616 | */ | |
1617 | ASSERT(0); | |
1618 | } | |
1619 | *curp = cur; | |
1620 | done: | |
1621 | *logflagsp = rval; | |
1622 | return error; | |
1623 | #undef LEFT | |
1624 | #undef RIGHT | |
1625 | #undef PREV | |
1da177e4 LT |
1626 | } |
1627 | ||
1628 | /* | |
1629 | * Called by xfs_bmap_add_extent to handle cases converting a hole | |
1630 | * to a delayed allocation. | |
1631 | */ | |
1632 | /*ARGSUSED*/ | |
1633 | STATIC int /* error */ | |
1634 | xfs_bmap_add_extent_hole_delay( | |
1635 | xfs_inode_t *ip, /* incore inode pointer */ | |
1636 | xfs_extnum_t idx, /* extent number to update/insert */ | |
4eea22f0 | 1637 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
1da177e4 LT |
1638 | int *logflagsp, /* inode logging flags */ |
1639 | int rsvd) /* OK to allocate reserved blocks */ | |
1640 | { | |
a6f64d4a | 1641 | xfs_bmbt_rec_host_t *ep; /* extent record for idx */ |
4eea22f0 | 1642 | xfs_ifork_t *ifp; /* inode fork pointer */ |
1da177e4 LT |
1643 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ |
1644 | xfs_filblks_t newlen=0; /* new indirect size */ | |
1645 | xfs_filblks_t oldlen=0; /* old indirect size */ | |
1646 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
1647 | int state; /* state bits, accessed thru macros */ | |
3e57ecf6 | 1648 | xfs_filblks_t temp=0; /* temp for indirect calculations */ |
1da177e4 | 1649 | |
4eea22f0 MK |
1650 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
1651 | ep = xfs_iext_get_ext(ifp, idx); | |
1da177e4 | 1652 | state = 0; |
9d87c319 | 1653 | ASSERT(isnullstartblock(new->br_startblock)); |
7574aa92 | 1654 | |
1da177e4 LT |
1655 | /* |
1656 | * Check and set flags if this segment has a left neighbor | |
1657 | */ | |
7574aa92 CH |
1658 | if (idx > 0) { |
1659 | state |= BMAP_LEFT_VALID; | |
4eea22f0 | 1660 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left); |
7574aa92 CH |
1661 | |
1662 | if (isnullstartblock(left.br_startblock)) | |
1663 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 1664 | } |
7574aa92 | 1665 | |
1da177e4 LT |
1666 | /* |
1667 | * Check and set flags if the current (right) segment exists. | |
1668 | * If it doesn't exist, we're converting the hole at end-of-file. | |
1669 | */ | |
7574aa92 CH |
1670 | if (idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { |
1671 | state |= BMAP_RIGHT_VALID; | |
1da177e4 | 1672 | xfs_bmbt_get_all(ep, &right); |
7574aa92 CH |
1673 | |
1674 | if (isnullstartblock(right.br_startblock)) | |
1675 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 1676 | } |
7574aa92 | 1677 | |
1da177e4 LT |
1678 | /* |
1679 | * Set contiguity flags on the left and right neighbors. | |
1680 | * Don't let extents get too large, even if the pieces are contiguous. | |
1681 | */ | |
7574aa92 CH |
1682 | if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) && |
1683 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
1684 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
1685 | state |= BMAP_LEFT_CONTIG; | |
1686 | ||
1687 | if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) && | |
1688 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
1689 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
1690 | (!(state & BMAP_LEFT_CONTIG) || | |
1691 | (left.br_blockcount + new->br_blockcount + | |
1692 | right.br_blockcount <= MAXEXTLEN))) | |
1693 | state |= BMAP_RIGHT_CONTIG; | |
1694 | ||
1da177e4 LT |
1695 | /* |
1696 | * Switch out based on the contiguity flags. | |
1697 | */ | |
7574aa92 CH |
1698 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { |
1699 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
1da177e4 LT |
1700 | /* |
1701 | * New allocation is contiguous with delayed allocations | |
1702 | * on the left and on the right. | |
4eea22f0 | 1703 | * Merge all three into a single extent record. |
1da177e4 LT |
1704 | */ |
1705 | temp = left.br_blockcount + new->br_blockcount + | |
1706 | right.br_blockcount; | |
0b1b213f CH |
1707 | |
1708 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); | |
4eea22f0 | 1709 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp); |
9d87c319 ES |
1710 | oldlen = startblockval(left.br_startblock) + |
1711 | startblockval(new->br_startblock) + | |
1712 | startblockval(right.br_startblock); | |
1da177e4 | 1713 | newlen = xfs_bmap_worst_indlen(ip, temp); |
4eea22f0 | 1714 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1), |
9d87c319 | 1715 | nullstartblock((int)newlen)); |
0b1b213f CH |
1716 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
1717 | ||
6ef35544 | 1718 | xfs_iext_remove(ip, idx, 1, state); |
1da177e4 LT |
1719 | ip->i_df.if_lastex = idx - 1; |
1720 | break; | |
1721 | ||
7574aa92 | 1722 | case BMAP_LEFT_CONTIG: |
1da177e4 LT |
1723 | /* |
1724 | * New allocation is contiguous with a delayed allocation | |
1725 | * on the left. | |
1726 | * Merge the new allocation with the left neighbor. | |
1727 | */ | |
1728 | temp = left.br_blockcount + new->br_blockcount; | |
0b1b213f | 1729 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); |
4eea22f0 | 1730 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), temp); |
9d87c319 ES |
1731 | oldlen = startblockval(left.br_startblock) + |
1732 | startblockval(new->br_startblock); | |
1da177e4 | 1733 | newlen = xfs_bmap_worst_indlen(ip, temp); |
4eea22f0 | 1734 | xfs_bmbt_set_startblock(xfs_iext_get_ext(ifp, idx - 1), |
9d87c319 | 1735 | nullstartblock((int)newlen)); |
0b1b213f CH |
1736 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
1737 | ||
1da177e4 LT |
1738 | ip->i_df.if_lastex = idx - 1; |
1739 | break; | |
1740 | ||
7574aa92 | 1741 | case BMAP_RIGHT_CONTIG: |
1da177e4 LT |
1742 | /* |
1743 | * New allocation is contiguous with a delayed allocation | |
1744 | * on the right. | |
1745 | * Merge the new allocation with the right neighbor. | |
1746 | */ | |
0b1b213f | 1747 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 | 1748 | temp = new->br_blockcount + right.br_blockcount; |
9d87c319 ES |
1749 | oldlen = startblockval(new->br_startblock) + |
1750 | startblockval(right.br_startblock); | |
1da177e4 LT |
1751 | newlen = xfs_bmap_worst_indlen(ip, temp); |
1752 | xfs_bmbt_set_allf(ep, new->br_startoff, | |
9d87c319 | 1753 | nullstartblock((int)newlen), temp, right.br_state); |
0b1b213f CH |
1754 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1755 | ||
1da177e4 LT |
1756 | ip->i_df.if_lastex = idx; |
1757 | break; | |
1758 | ||
1759 | case 0: | |
1760 | /* | |
1761 | * New allocation is not contiguous with another | |
1762 | * delayed allocation. | |
1763 | * Insert a new entry. | |
1764 | */ | |
1765 | oldlen = newlen = 0; | |
6ef35544 | 1766 | xfs_iext_insert(ip, idx, 1, new, state); |
1da177e4 LT |
1767 | ip->i_df.if_lastex = idx; |
1768 | break; | |
1769 | } | |
1770 | if (oldlen != newlen) { | |
1771 | ASSERT(oldlen > newlen); | |
96540c78 | 1772 | xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 1773 | (int64_t)(oldlen - newlen), rsvd); |
1da177e4 LT |
1774 | /* |
1775 | * Nothing to do for disk quota accounting here. | |
1776 | */ | |
1777 | } | |
1778 | *logflagsp = 0; | |
1779 | return 0; | |
1da177e4 LT |
1780 | } |
1781 | ||
1782 | /* | |
1783 | * Called by xfs_bmap_add_extent to handle cases converting a hole | |
1784 | * to a real allocation. | |
1785 | */ | |
1786 | STATIC int /* error */ | |
1787 | xfs_bmap_add_extent_hole_real( | |
1788 | xfs_inode_t *ip, /* incore inode pointer */ | |
1789 | xfs_extnum_t idx, /* extent number to update/insert */ | |
1790 | xfs_btree_cur_t *cur, /* if null, not a btree */ | |
4eea22f0 | 1791 | xfs_bmbt_irec_t *new, /* new data to add to file extents */ |
1da177e4 LT |
1792 | int *logflagsp, /* inode logging flags */ |
1793 | int whichfork) /* data or attr fork */ | |
1794 | { | |
a6f64d4a | 1795 | xfs_bmbt_rec_host_t *ep; /* pointer to extent entry ins. point */ |
1da177e4 | 1796 | int error; /* error return value */ |
1da177e4 LT |
1797 | int i; /* temp state */ |
1798 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
1799 | xfs_bmbt_irec_t left; /* left neighbor extent entry */ | |
1800 | xfs_bmbt_irec_t right; /* right neighbor extent entry */ | |
3e57ecf6 | 1801 | int rval=0; /* return value (logging flags) */ |
1da177e4 | 1802 | int state; /* state bits, accessed thru macros */ |
1da177e4 LT |
1803 | |
1804 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
1805 | ASSERT(idx <= ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)); | |
4eea22f0 | 1806 | ep = xfs_iext_get_ext(ifp, idx); |
1da177e4 | 1807 | state = 0; |
7574aa92 | 1808 | |
6ef35544 CH |
1809 | if (whichfork == XFS_ATTR_FORK) |
1810 | state |= BMAP_ATTRFORK; | |
1811 | ||
1da177e4 LT |
1812 | /* |
1813 | * Check and set flags if this segment has a left neighbor. | |
1814 | */ | |
7574aa92 CH |
1815 | if (idx > 0) { |
1816 | state |= BMAP_LEFT_VALID; | |
4eea22f0 | 1817 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, idx - 1), &left); |
7574aa92 CH |
1818 | if (isnullstartblock(left.br_startblock)) |
1819 | state |= BMAP_LEFT_DELAY; | |
1da177e4 | 1820 | } |
7574aa92 | 1821 | |
1da177e4 LT |
1822 | /* |
1823 | * Check and set flags if this segment has a current value. | |
1824 | * Not true if we're inserting into the "hole" at eof. | |
1825 | */ | |
7574aa92 CH |
1826 | if (idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) { |
1827 | state |= BMAP_RIGHT_VALID; | |
1da177e4 | 1828 | xfs_bmbt_get_all(ep, &right); |
7574aa92 CH |
1829 | if (isnullstartblock(right.br_startblock)) |
1830 | state |= BMAP_RIGHT_DELAY; | |
1da177e4 | 1831 | } |
7574aa92 | 1832 | |
1da177e4 LT |
1833 | /* |
1834 | * We're inserting a real allocation between "left" and "right". | |
1835 | * Set the contiguity flags. Don't let extents get too large. | |
1836 | */ | |
7574aa92 CH |
1837 | if ((state & BMAP_LEFT_VALID) && !(state & BMAP_LEFT_DELAY) && |
1838 | left.br_startoff + left.br_blockcount == new->br_startoff && | |
1839 | left.br_startblock + left.br_blockcount == new->br_startblock && | |
1840 | left.br_state == new->br_state && | |
1841 | left.br_blockcount + new->br_blockcount <= MAXEXTLEN) | |
1842 | state |= BMAP_LEFT_CONTIG; | |
1843 | ||
1844 | if ((state & BMAP_RIGHT_VALID) && !(state & BMAP_RIGHT_DELAY) && | |
1845 | new->br_startoff + new->br_blockcount == right.br_startoff && | |
1846 | new->br_startblock + new->br_blockcount == right.br_startblock && | |
1847 | new->br_state == right.br_state && | |
1848 | new->br_blockcount + right.br_blockcount <= MAXEXTLEN && | |
1849 | (!(state & BMAP_LEFT_CONTIG) || | |
1850 | left.br_blockcount + new->br_blockcount + | |
1851 | right.br_blockcount <= MAXEXTLEN)) | |
1852 | state |= BMAP_RIGHT_CONTIG; | |
1da177e4 | 1853 | |
3e57ecf6 | 1854 | error = 0; |
1da177e4 LT |
1855 | /* |
1856 | * Select which case we're in here, and implement it. | |
1857 | */ | |
7574aa92 CH |
1858 | switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) { |
1859 | case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG: | |
1da177e4 LT |
1860 | /* |
1861 | * New allocation is contiguous with real allocations on the | |
1862 | * left and on the right. | |
4eea22f0 | 1863 | * Merge all three into a single extent record. |
1da177e4 | 1864 | */ |
0b1b213f | 1865 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); |
4eea22f0 | 1866 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
1da177e4 LT |
1867 | left.br_blockcount + new->br_blockcount + |
1868 | right.br_blockcount); | |
0b1b213f CH |
1869 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
1870 | ||
6ef35544 | 1871 | xfs_iext_remove(ip, idx, 1, state); |
1da177e4 LT |
1872 | ifp->if_lastex = idx - 1; |
1873 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
1874 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
1875 | if (cur == NULL) { | |
9d87c319 | 1876 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); |
3e57ecf6 OW |
1877 | } else { |
1878 | rval = XFS_ILOG_CORE; | |
1879 | if ((error = xfs_bmbt_lookup_eq(cur, | |
1880 | right.br_startoff, | |
1881 | right.br_startblock, | |
1882 | right.br_blockcount, &i))) | |
1883 | goto done; | |
6bd8fc8a | 1884 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
91cca5df | 1885 | if ((error = xfs_btree_delete(cur, &i))) |
3e57ecf6 | 1886 | goto done; |
6bd8fc8a | 1887 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
8df4da4a | 1888 | if ((error = xfs_btree_decrement(cur, 0, &i))) |
3e57ecf6 | 1889 | goto done; |
6bd8fc8a | 1890 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
3e57ecf6 OW |
1891 | if ((error = xfs_bmbt_update(cur, left.br_startoff, |
1892 | left.br_startblock, | |
1893 | left.br_blockcount + | |
1894 | new->br_blockcount + | |
1895 | right.br_blockcount, | |
1896 | left.br_state))) | |
1897 | goto done; | |
1da177e4 | 1898 | } |
3e57ecf6 | 1899 | break; |
1da177e4 | 1900 | |
7574aa92 | 1901 | case BMAP_LEFT_CONTIG: |
1da177e4 LT |
1902 | /* |
1903 | * New allocation is contiguous with a real allocation | |
1904 | * on the left. | |
1905 | * Merge the new allocation with the left neighbor. | |
1906 | */ | |
0b1b213f | 1907 | trace_xfs_bmap_pre_update(ip, idx - 1, state, _THIS_IP_); |
4eea22f0 | 1908 | xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, idx - 1), |
1da177e4 | 1909 | left.br_blockcount + new->br_blockcount); |
0b1b213f CH |
1910 | trace_xfs_bmap_post_update(ip, idx - 1, state, _THIS_IP_); |
1911 | ||
1da177e4 LT |
1912 | ifp->if_lastex = idx - 1; |
1913 | if (cur == NULL) { | |
9d87c319 | 1914 | rval = xfs_ilog_fext(whichfork); |
3e57ecf6 OW |
1915 | } else { |
1916 | rval = 0; | |
1917 | if ((error = xfs_bmbt_lookup_eq(cur, | |
1918 | left.br_startoff, | |
1919 | left.br_startblock, | |
1920 | left.br_blockcount, &i))) | |
1921 | goto done; | |
6bd8fc8a | 1922 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
3e57ecf6 OW |
1923 | if ((error = xfs_bmbt_update(cur, left.br_startoff, |
1924 | left.br_startblock, | |
1925 | left.br_blockcount + | |
1926 | new->br_blockcount, | |
1927 | left.br_state))) | |
1928 | goto done; | |
1da177e4 | 1929 | } |
3e57ecf6 | 1930 | break; |
1da177e4 | 1931 | |
7574aa92 | 1932 | case BMAP_RIGHT_CONTIG: |
1da177e4 LT |
1933 | /* |
1934 | * New allocation is contiguous with a real allocation | |
1935 | * on the right. | |
1936 | * Merge the new allocation with the right neighbor. | |
1937 | */ | |
0b1b213f | 1938 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
1939 | xfs_bmbt_set_allf(ep, new->br_startoff, new->br_startblock, |
1940 | new->br_blockcount + right.br_blockcount, | |
1941 | right.br_state); | |
0b1b213f CH |
1942 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1943 | ||
1da177e4 LT |
1944 | ifp->if_lastex = idx; |
1945 | if (cur == NULL) { | |
9d87c319 | 1946 | rval = xfs_ilog_fext(whichfork); |
3e57ecf6 OW |
1947 | } else { |
1948 | rval = 0; | |
1949 | if ((error = xfs_bmbt_lookup_eq(cur, | |
1950 | right.br_startoff, | |
1951 | right.br_startblock, | |
1952 | right.br_blockcount, &i))) | |
1953 | goto done; | |
6bd8fc8a | 1954 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
3e57ecf6 OW |
1955 | if ((error = xfs_bmbt_update(cur, new->br_startoff, |
1956 | new->br_startblock, | |
1957 | new->br_blockcount + | |
1958 | right.br_blockcount, | |
1959 | right.br_state))) | |
1960 | goto done; | |
1da177e4 | 1961 | } |
3e57ecf6 | 1962 | break; |
1da177e4 LT |
1963 | |
1964 | case 0: | |
1965 | /* | |
1966 | * New allocation is not contiguous with another | |
1967 | * real allocation. | |
1968 | * Insert a new entry. | |
1969 | */ | |
6ef35544 | 1970 | xfs_iext_insert(ip, idx, 1, new, state); |
1da177e4 LT |
1971 | ifp->if_lastex = idx; |
1972 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
1973 | XFS_IFORK_NEXTENTS(ip, whichfork) + 1); | |
1974 | if (cur == NULL) { | |
9d87c319 | 1975 | rval = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); |
3e57ecf6 OW |
1976 | } else { |
1977 | rval = XFS_ILOG_CORE; | |
1978 | if ((error = xfs_bmbt_lookup_eq(cur, | |
1979 | new->br_startoff, | |
1980 | new->br_startblock, | |
1981 | new->br_blockcount, &i))) | |
1982 | goto done; | |
6bd8fc8a | 1983 | XFS_WANT_CORRUPTED_GOTO(i == 0, done); |
3e57ecf6 | 1984 | cur->bc_rec.b.br_state = new->br_state; |
4b22a571 | 1985 | if ((error = xfs_btree_insert(cur, &i))) |
3e57ecf6 | 1986 | goto done; |
6bd8fc8a | 1987 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 | 1988 | } |
3e57ecf6 | 1989 | break; |
1da177e4 | 1990 | } |
3e57ecf6 OW |
1991 | done: |
1992 | *logflagsp = rval; | |
1993 | return error; | |
1da177e4 LT |
1994 | } |
1995 | ||
dd9f438e NS |
1996 | /* |
1997 | * Adjust the size of the new extent based on di_extsize and rt extsize. | |
1998 | */ | |
1999 | STATIC int | |
2000 | xfs_bmap_extsize_align( | |
2001 | xfs_mount_t *mp, | |
2002 | xfs_bmbt_irec_t *gotp, /* next extent pointer */ | |
2003 | xfs_bmbt_irec_t *prevp, /* previous extent pointer */ | |
2004 | xfs_extlen_t extsz, /* align to this extent size */ | |
2005 | int rt, /* is this a realtime inode? */ | |
2006 | int eof, /* is extent at end-of-file? */ | |
2007 | int delay, /* creating delalloc extent? */ | |
2008 | int convert, /* overwriting unwritten extent? */ | |
2009 | xfs_fileoff_t *offp, /* in/out: aligned offset */ | |
2010 | xfs_extlen_t *lenp) /* in/out: aligned length */ | |
2011 | { | |
2012 | xfs_fileoff_t orig_off; /* original offset */ | |
2013 | xfs_extlen_t orig_alen; /* original length */ | |
2014 | xfs_fileoff_t orig_end; /* original off+len */ | |
2015 | xfs_fileoff_t nexto; /* next file offset */ | |
2016 | xfs_fileoff_t prevo; /* previous file offset */ | |
2017 | xfs_fileoff_t align_off; /* temp for offset */ | |
2018 | xfs_extlen_t align_alen; /* temp for length */ | |
2019 | xfs_extlen_t temp; /* temp for calculations */ | |
2020 | ||
2021 | if (convert) | |
2022 | return 0; | |
2023 | ||
2024 | orig_off = align_off = *offp; | |
2025 | orig_alen = align_alen = *lenp; | |
2026 | orig_end = orig_off + orig_alen; | |
2027 | ||
2028 | /* | |
2029 | * If this request overlaps an existing extent, then don't | |
2030 | * attempt to perform any additional alignment. | |
2031 | */ | |
2032 | if (!delay && !eof && | |
2033 | (orig_off >= gotp->br_startoff) && | |
2034 | (orig_end <= gotp->br_startoff + gotp->br_blockcount)) { | |
2035 | return 0; | |
2036 | } | |
2037 | ||
2038 | /* | |
2039 | * If the file offset is unaligned vs. the extent size | |
2040 | * we need to align it. This will be possible unless | |
2041 | * the file was previously written with a kernel that didn't | |
2042 | * perform this alignment, or if a truncate shot us in the | |
2043 | * foot. | |
2044 | */ | |
2045 | temp = do_mod(orig_off, extsz); | |
2046 | if (temp) { | |
2047 | align_alen += temp; | |
2048 | align_off -= temp; | |
2049 | } | |
2050 | /* | |
2051 | * Same adjustment for the end of the requested area. | |
2052 | */ | |
2053 | if ((temp = (align_alen % extsz))) { | |
2054 | align_alen += extsz - temp; | |
2055 | } | |
2056 | /* | |
2057 | * If the previous block overlaps with this proposed allocation | |
2058 | * then move the start forward without adjusting the length. | |
2059 | */ | |
2060 | if (prevp->br_startoff != NULLFILEOFF) { | |
2061 | if (prevp->br_startblock == HOLESTARTBLOCK) | |
2062 | prevo = prevp->br_startoff; | |
2063 | else | |
2064 | prevo = prevp->br_startoff + prevp->br_blockcount; | |
2065 | } else | |
2066 | prevo = 0; | |
2067 | if (align_off != orig_off && align_off < prevo) | |
2068 | align_off = prevo; | |
2069 | /* | |
2070 | * If the next block overlaps with this proposed allocation | |
2071 | * then move the start back without adjusting the length, | |
2072 | * but not before offset 0. | |
2073 | * This may of course make the start overlap previous block, | |
2074 | * and if we hit the offset 0 limit then the next block | |
2075 | * can still overlap too. | |
2076 | */ | |
2077 | if (!eof && gotp->br_startoff != NULLFILEOFF) { | |
2078 | if ((delay && gotp->br_startblock == HOLESTARTBLOCK) || | |
2079 | (!delay && gotp->br_startblock == DELAYSTARTBLOCK)) | |
2080 | nexto = gotp->br_startoff + gotp->br_blockcount; | |
2081 | else | |
2082 | nexto = gotp->br_startoff; | |
2083 | } else | |
2084 | nexto = NULLFILEOFF; | |
2085 | if (!eof && | |
2086 | align_off + align_alen != orig_end && | |
2087 | align_off + align_alen > nexto) | |
2088 | align_off = nexto > align_alen ? nexto - align_alen : 0; | |
2089 | /* | |
2090 | * If we're now overlapping the next or previous extent that | |
2091 | * means we can't fit an extsz piece in this hole. Just move | |
2092 | * the start forward to the first valid spot and set | |
2093 | * the length so we hit the end. | |
2094 | */ | |
2095 | if (align_off != orig_off && align_off < prevo) | |
2096 | align_off = prevo; | |
2097 | if (align_off + align_alen != orig_end && | |
2098 | align_off + align_alen > nexto && | |
2099 | nexto != NULLFILEOFF) { | |
2100 | ASSERT(nexto > prevo); | |
2101 | align_alen = nexto - align_off; | |
2102 | } | |
2103 | ||
2104 | /* | |
2105 | * If realtime, and the result isn't a multiple of the realtime | |
2106 | * extent size we need to remove blocks until it is. | |
2107 | */ | |
2108 | if (rt && (temp = (align_alen % mp->m_sb.sb_rextsize))) { | |
2109 | /* | |
2110 | * We're not covering the original request, or | |
2111 | * we won't be able to once we fix the length. | |
2112 | */ | |
2113 | if (orig_off < align_off || | |
2114 | orig_end > align_off + align_alen || | |
2115 | align_alen - temp < orig_alen) | |
2116 | return XFS_ERROR(EINVAL); | |
2117 | /* | |
2118 | * Try to fix it by moving the start up. | |
2119 | */ | |
2120 | if (align_off + temp <= orig_off) { | |
2121 | align_alen -= temp; | |
2122 | align_off += temp; | |
2123 | } | |
2124 | /* | |
2125 | * Try to fix it by moving the end in. | |
2126 | */ | |
2127 | else if (align_off + align_alen - temp >= orig_end) | |
2128 | align_alen -= temp; | |
2129 | /* | |
2130 | * Set the start to the minimum then trim the length. | |
2131 | */ | |
2132 | else { | |
2133 | align_alen -= orig_off - align_off; | |
2134 | align_off = orig_off; | |
2135 | align_alen -= align_alen % mp->m_sb.sb_rextsize; | |
2136 | } | |
2137 | /* | |
2138 | * Result doesn't cover the request, fail it. | |
2139 | */ | |
2140 | if (orig_off < align_off || orig_end > align_off + align_alen) | |
2141 | return XFS_ERROR(EINVAL); | |
2142 | } else { | |
2143 | ASSERT(orig_off >= align_off); | |
2144 | ASSERT(orig_end <= align_off + align_alen); | |
2145 | } | |
2146 | ||
2147 | #ifdef DEBUG | |
2148 | if (!eof && gotp->br_startoff != NULLFILEOFF) | |
2149 | ASSERT(align_off + align_alen <= gotp->br_startoff); | |
2150 | if (prevp->br_startoff != NULLFILEOFF) | |
2151 | ASSERT(align_off >= prevp->br_startoff + prevp->br_blockcount); | |
2152 | #endif | |
2153 | ||
2154 | *lenp = align_alen; | |
2155 | *offp = align_off; | |
2156 | return 0; | |
2157 | } | |
2158 | ||
1da177e4 LT |
2159 | #define XFS_ALLOC_GAP_UNITS 4 |
2160 | ||
c2b1cba6 | 2161 | STATIC void |
a365bdd5 | 2162 | xfs_bmap_adjacent( |
1da177e4 LT |
2163 | xfs_bmalloca_t *ap) /* bmap alloc argument struct */ |
2164 | { | |
2165 | xfs_fsblock_t adjust; /* adjustment to block numbers */ | |
1da177e4 LT |
2166 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ |
2167 | xfs_mount_t *mp; /* mount point structure */ | |
2168 | int nullfb; /* true if ap->firstblock isn't set */ | |
2169 | int rt; /* true if inode is realtime */ | |
1da177e4 LT |
2170 | |
2171 | #define ISVALID(x,y) \ | |
2172 | (rt ? \ | |
2173 | (x) < mp->m_sb.sb_rblocks : \ | |
2174 | XFS_FSB_TO_AGNO(mp, x) == XFS_FSB_TO_AGNO(mp, y) && \ | |
2175 | XFS_FSB_TO_AGNO(mp, x) < mp->m_sb.sb_agcount && \ | |
2176 | XFS_FSB_TO_AGBNO(mp, x) < mp->m_sb.sb_agblocks) | |
2177 | ||
1da177e4 LT |
2178 | mp = ap->ip->i_mount; |
2179 | nullfb = ap->firstblock == NULLFSBLOCK; | |
2180 | rt = XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata; | |
2181 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock); | |
1da177e4 LT |
2182 | /* |
2183 | * If allocating at eof, and there's a previous real block, | |
9da096fd | 2184 | * try to use its last block as our starting point. |
1da177e4 LT |
2185 | */ |
2186 | if (ap->eof && ap->prevp->br_startoff != NULLFILEOFF && | |
9d87c319 | 2187 | !isnullstartblock(ap->prevp->br_startblock) && |
1da177e4 LT |
2188 | ISVALID(ap->prevp->br_startblock + ap->prevp->br_blockcount, |
2189 | ap->prevp->br_startblock)) { | |
2190 | ap->rval = ap->prevp->br_startblock + ap->prevp->br_blockcount; | |
2191 | /* | |
2192 | * Adjust for the gap between prevp and us. | |
2193 | */ | |
2194 | adjust = ap->off - | |
2195 | (ap->prevp->br_startoff + ap->prevp->br_blockcount); | |
2196 | if (adjust && | |
2197 | ISVALID(ap->rval + adjust, ap->prevp->br_startblock)) | |
2198 | ap->rval += adjust; | |
2199 | } | |
2200 | /* | |
2201 | * If not at eof, then compare the two neighbor blocks. | |
2202 | * Figure out whether either one gives us a good starting point, | |
2203 | * and pick the better one. | |
2204 | */ | |
2205 | else if (!ap->eof) { | |
2206 | xfs_fsblock_t gotbno; /* right side block number */ | |
2207 | xfs_fsblock_t gotdiff=0; /* right side difference */ | |
2208 | xfs_fsblock_t prevbno; /* left side block number */ | |
2209 | xfs_fsblock_t prevdiff=0; /* left side difference */ | |
2210 | ||
2211 | /* | |
2212 | * If there's a previous (left) block, select a requested | |
2213 | * start block based on it. | |
2214 | */ | |
2215 | if (ap->prevp->br_startoff != NULLFILEOFF && | |
9d87c319 | 2216 | !isnullstartblock(ap->prevp->br_startblock) && |
1da177e4 LT |
2217 | (prevbno = ap->prevp->br_startblock + |
2218 | ap->prevp->br_blockcount) && | |
2219 | ISVALID(prevbno, ap->prevp->br_startblock)) { | |
2220 | /* | |
2221 | * Calculate gap to end of previous block. | |
2222 | */ | |
2223 | adjust = prevdiff = ap->off - | |
2224 | (ap->prevp->br_startoff + | |
2225 | ap->prevp->br_blockcount); | |
2226 | /* | |
2227 | * Figure the startblock based on the previous block's | |
2228 | * end and the gap size. | |
2229 | * Heuristic! | |
2230 | * If the gap is large relative to the piece we're | |
2231 | * allocating, or using it gives us an invalid block | |
2232 | * number, then just use the end of the previous block. | |
2233 | */ | |
2234 | if (prevdiff <= XFS_ALLOC_GAP_UNITS * ap->alen && | |
2235 | ISVALID(prevbno + prevdiff, | |
2236 | ap->prevp->br_startblock)) | |
2237 | prevbno += adjust; | |
2238 | else | |
2239 | prevdiff += adjust; | |
2240 | /* | |
2241 | * If the firstblock forbids it, can't use it, | |
2242 | * must use default. | |
2243 | */ | |
2244 | if (!rt && !nullfb && | |
2245 | XFS_FSB_TO_AGNO(mp, prevbno) != fb_agno) | |
2246 | prevbno = NULLFSBLOCK; | |
2247 | } | |
2248 | /* | |
2249 | * No previous block or can't follow it, just default. | |
2250 | */ | |
2251 | else | |
2252 | prevbno = NULLFSBLOCK; | |
2253 | /* | |
2254 | * If there's a following (right) block, select a requested | |
2255 | * start block based on it. | |
2256 | */ | |
9d87c319 | 2257 | if (!isnullstartblock(ap->gotp->br_startblock)) { |
1da177e4 LT |
2258 | /* |
2259 | * Calculate gap to start of next block. | |
2260 | */ | |
2261 | adjust = gotdiff = ap->gotp->br_startoff - ap->off; | |
2262 | /* | |
2263 | * Figure the startblock based on the next block's | |
2264 | * start and the gap size. | |
2265 | */ | |
2266 | gotbno = ap->gotp->br_startblock; | |
2267 | /* | |
2268 | * Heuristic! | |
2269 | * If the gap is large relative to the piece we're | |
2270 | * allocating, or using it gives us an invalid block | |
2271 | * number, then just use the start of the next block | |
2272 | * offset by our length. | |
2273 | */ | |
2274 | if (gotdiff <= XFS_ALLOC_GAP_UNITS * ap->alen && | |
2275 | ISVALID(gotbno - gotdiff, gotbno)) | |
2276 | gotbno -= adjust; | |
2277 | else if (ISVALID(gotbno - ap->alen, gotbno)) { | |
2278 | gotbno -= ap->alen; | |
2279 | gotdiff += adjust - ap->alen; | |
2280 | } else | |
2281 | gotdiff += adjust; | |
2282 | /* | |
2283 | * If the firstblock forbids it, can't use it, | |
2284 | * must use default. | |
2285 | */ | |
2286 | if (!rt && !nullfb && | |
2287 | XFS_FSB_TO_AGNO(mp, gotbno) != fb_agno) | |
2288 | gotbno = NULLFSBLOCK; | |
2289 | } | |
2290 | /* | |
2291 | * No next block, just default. | |
2292 | */ | |
2293 | else | |
2294 | gotbno = NULLFSBLOCK; | |
2295 | /* | |
2296 | * If both valid, pick the better one, else the only good | |
2297 | * one, else ap->rval is already set (to 0 or the inode block). | |
2298 | */ | |
2299 | if (prevbno != NULLFSBLOCK && gotbno != NULLFSBLOCK) | |
2300 | ap->rval = prevdiff <= gotdiff ? prevbno : gotbno; | |
2301 | else if (prevbno != NULLFSBLOCK) | |
2302 | ap->rval = prevbno; | |
2303 | else if (gotbno != NULLFSBLOCK) | |
2304 | ap->rval = gotbno; | |
2305 | } | |
a365bdd5 | 2306 | #undef ISVALID |
a365bdd5 NS |
2307 | } |
2308 | ||
2309 | STATIC int | |
2310 | xfs_bmap_rtalloc( | |
2311 | xfs_bmalloca_t *ap) /* bmap alloc argument struct */ | |
2312 | { | |
2313 | xfs_alloctype_t atype = 0; /* type for allocation routines */ | |
2314 | int error; /* error return value */ | |
2315 | xfs_mount_t *mp; /* mount point structure */ | |
2316 | xfs_extlen_t prod = 0; /* product factor for allocators */ | |
2317 | xfs_extlen_t ralen = 0; /* realtime allocation length */ | |
2318 | xfs_extlen_t align; /* minimum allocation alignment */ | |
a365bdd5 NS |
2319 | xfs_rtblock_t rtb; |
2320 | ||
2321 | mp = ap->ip->i_mount; | |
957d0ebe | 2322 | align = xfs_get_extsz_hint(ap->ip); |
a365bdd5 NS |
2323 | prod = align / mp->m_sb.sb_rextsize; |
2324 | error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp, | |
2325 | align, 1, ap->eof, 0, | |
2326 | ap->conv, &ap->off, &ap->alen); | |
2327 | if (error) | |
2328 | return error; | |
2329 | ASSERT(ap->alen); | |
2330 | ASSERT(ap->alen % mp->m_sb.sb_rextsize == 0); | |
2331 | ||
2332 | /* | |
2333 | * If the offset & length are not perfectly aligned | |
2334 | * then kill prod, it will just get us in trouble. | |
2335 | */ | |
2336 | if (do_mod(ap->off, align) || ap->alen % align) | |
2337 | prod = 1; | |
2338 | /* | |
2339 | * Set ralen to be the actual requested length in rtextents. | |
2340 | */ | |
2341 | ralen = ap->alen / mp->m_sb.sb_rextsize; | |
2342 | /* | |
2343 | * If the old value was close enough to MAXEXTLEN that | |
2344 | * we rounded up to it, cut it back so it's valid again. | |
2345 | * Note that if it's a really large request (bigger than | |
2346 | * MAXEXTLEN), we don't hear about that number, and can't | |
2347 | * adjust the starting point to match it. | |
2348 | */ | |
2349 | if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN) | |
2350 | ralen = MAXEXTLEN / mp->m_sb.sb_rextsize; | |
2351 | /* | |
2352 | * If it's an allocation to an empty file at offset 0, | |
2353 | * pick an extent that will space things out in the rt area. | |
2354 | */ | |
2355 | if (ap->eof && ap->off == 0) { | |
0892ccd6 AM |
2356 | xfs_rtblock_t uninitialized_var(rtx); /* realtime extent no */ |
2357 | ||
a365bdd5 NS |
2358 | error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx); |
2359 | if (error) | |
2360 | return error; | |
2361 | ap->rval = rtx * mp->m_sb.sb_rextsize; | |
2362 | } else { | |
2363 | ap->rval = 0; | |
2364 | } | |
2365 | ||
2366 | xfs_bmap_adjacent(ap); | |
2367 | ||
2368 | /* | |
2369 | * Realtime allocation, done through xfs_rtallocate_extent. | |
2370 | */ | |
2371 | atype = ap->rval == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO; | |
2372 | do_div(ap->rval, mp->m_sb.sb_rextsize); | |
2373 | rtb = ap->rval; | |
2374 | ap->alen = ralen; | |
2375 | if ((error = xfs_rtallocate_extent(ap->tp, ap->rval, 1, ap->alen, | |
2376 | &ralen, atype, ap->wasdel, prod, &rtb))) | |
2377 | return error; | |
2378 | if (rtb == NULLFSBLOCK && prod > 1 && | |
2379 | (error = xfs_rtallocate_extent(ap->tp, ap->rval, 1, | |
2380 | ap->alen, &ralen, atype, | |
2381 | ap->wasdel, 1, &rtb))) | |
2382 | return error; | |
2383 | ap->rval = rtb; | |
2384 | if (ap->rval != NULLFSBLOCK) { | |
2385 | ap->rval *= mp->m_sb.sb_rextsize; | |
2386 | ralen *= mp->m_sb.sb_rextsize; | |
2387 | ap->alen = ralen; | |
2388 | ap->ip->i_d.di_nblocks += ralen; | |
2389 | xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); | |
2390 | if (ap->wasdel) | |
2391 | ap->ip->i_delayed_blks -= ralen; | |
2392 | /* | |
2393 | * Adjust the disk quota also. This was reserved | |
2394 | * earlier. | |
2395 | */ | |
7d095257 | 2396 | xfs_trans_mod_dquot_byino(ap->tp, ap->ip, |
a365bdd5 NS |
2397 | ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT : |
2398 | XFS_TRANS_DQ_RTBCOUNT, (long) ralen); | |
2399 | } else { | |
2400 | ap->alen = 0; | |
2401 | } | |
2402 | return 0; | |
2403 | } | |
2404 | ||
c467c049 CH |
2405 | STATIC int |
2406 | xfs_bmap_btalloc_nullfb( | |
2407 | struct xfs_bmalloca *ap, | |
2408 | struct xfs_alloc_arg *args, | |
2409 | xfs_extlen_t *blen) | |
2410 | { | |
2411 | struct xfs_mount *mp = ap->ip->i_mount; | |
2412 | struct xfs_perag *pag; | |
2413 | xfs_agnumber_t ag, startag; | |
2414 | int notinit = 0; | |
2415 | int error; | |
2416 | ||
2417 | if (ap->userdata && xfs_inode_is_filestream(ap->ip)) | |
2418 | args->type = XFS_ALLOCTYPE_NEAR_BNO; | |
2419 | else | |
2420 | args->type = XFS_ALLOCTYPE_START_BNO; | |
2421 | args->total = ap->total; | |
2422 | ||
2423 | /* | |
2424 | * Search for an allocation group with a single extent large enough | |
2425 | * for the request. If one isn't found, then adjust the minimum | |
2426 | * allocation size to the largest space found. | |
2427 | */ | |
2428 | startag = ag = XFS_FSB_TO_AGNO(mp, args->fsbno); | |
2429 | if (startag == NULLAGNUMBER) | |
2430 | startag = ag = 0; | |
2431 | ||
2432 | pag = xfs_perag_get(mp, ag); | |
2433 | while (*blen < ap->alen) { | |
2434 | if (!pag->pagf_init) { | |
2435 | error = xfs_alloc_pagf_init(mp, args->tp, ag, | |
2436 | XFS_ALLOC_FLAG_TRYLOCK); | |
2437 | if (error) { | |
2438 | xfs_perag_put(pag); | |
2439 | return error; | |
2440 | } | |
2441 | } | |
2442 | ||
2443 | /* | |
2444 | * See xfs_alloc_fix_freelist... | |
2445 | */ | |
2446 | if (pag->pagf_init) { | |
2447 | xfs_extlen_t longest; | |
2448 | longest = xfs_alloc_longest_free_extent(mp, pag); | |
2449 | if (*blen < longest) | |
2450 | *blen = longest; | |
2451 | } else | |
2452 | notinit = 1; | |
2453 | ||
2454 | if (xfs_inode_is_filestream(ap->ip)) { | |
2455 | if (*blen >= ap->alen) | |
2456 | break; | |
2457 | ||
2458 | if (ap->userdata) { | |
2459 | /* | |
2460 | * If startag is an invalid AG, we've | |
2461 | * come here once before and | |
2462 | * xfs_filestream_new_ag picked the | |
2463 | * best currently available. | |
2464 | * | |
2465 | * Don't continue looping, since we | |
2466 | * could loop forever. | |
2467 | */ | |
2468 | if (startag == NULLAGNUMBER) | |
2469 | break; | |
2470 | ||
2471 | error = xfs_filestream_new_ag(ap, &ag); | |
2472 | xfs_perag_put(pag); | |
2473 | if (error) | |
2474 | return error; | |
2475 | ||
2476 | /* loop again to set 'blen'*/ | |
2477 | startag = NULLAGNUMBER; | |
2478 | pag = xfs_perag_get(mp, ag); | |
2479 | continue; | |
2480 | } | |
2481 | } | |
2482 | if (++ag == mp->m_sb.sb_agcount) | |
2483 | ag = 0; | |
2484 | if (ag == startag) | |
2485 | break; | |
2486 | xfs_perag_put(pag); | |
2487 | pag = xfs_perag_get(mp, ag); | |
2488 | } | |
2489 | xfs_perag_put(pag); | |
2490 | ||
2491 | /* | |
2492 | * Since the above loop did a BUF_TRYLOCK, it is | |
2493 | * possible that there is space for this request. | |
2494 | */ | |
2495 | if (notinit || *blen < ap->minlen) | |
2496 | args->minlen = ap->minlen; | |
2497 | /* | |
2498 | * If the best seen length is less than the request | |
2499 | * length, use the best as the minimum. | |
2500 | */ | |
2501 | else if (*blen < ap->alen) | |
2502 | args->minlen = *blen; | |
2503 | /* | |
2504 | * Otherwise we've seen an extent as big as alen, | |
2505 | * use that as the minimum. | |
2506 | */ | |
2507 | else | |
2508 | args->minlen = ap->alen; | |
2509 | ||
2510 | /* | |
2511 | * set the failure fallback case to look in the selected | |
2512 | * AG as the stream may have moved. | |
2513 | */ | |
2514 | if (xfs_inode_is_filestream(ap->ip)) | |
2515 | ap->rval = args->fsbno = XFS_AGB_TO_FSB(mp, ag, 0); | |
2516 | ||
2517 | return 0; | |
2518 | } | |
2519 | ||
a365bdd5 NS |
2520 | STATIC int |
2521 | xfs_bmap_btalloc( | |
2522 | xfs_bmalloca_t *ap) /* bmap alloc argument struct */ | |
2523 | { | |
2524 | xfs_mount_t *mp; /* mount point structure */ | |
2525 | xfs_alloctype_t atype = 0; /* type for allocation routines */ | |
2526 | xfs_extlen_t align; /* minimum allocation alignment */ | |
a365bdd5 | 2527 | xfs_agnumber_t fb_agno; /* ag number of ap->firstblock */ |
c467c049 | 2528 | xfs_agnumber_t ag; |
a365bdd5 NS |
2529 | xfs_alloc_arg_t args; |
2530 | xfs_extlen_t blen; | |
a365bdd5 | 2531 | xfs_extlen_t nextminlen = 0; |
a365bdd5 NS |
2532 | int nullfb; /* true if ap->firstblock isn't set */ |
2533 | int isaligned; | |
a365bdd5 NS |
2534 | int tryagain; |
2535 | int error; | |
2536 | ||
2537 | mp = ap->ip->i_mount; | |
957d0ebe | 2538 | align = ap->userdata ? xfs_get_extsz_hint(ap->ip) : 0; |
a365bdd5 NS |
2539 | if (unlikely(align)) { |
2540 | error = xfs_bmap_extsize_align(mp, ap->gotp, ap->prevp, | |
2541 | align, 0, ap->eof, 0, ap->conv, | |
2542 | &ap->off, &ap->alen); | |
2543 | ASSERT(!error); | |
2544 | ASSERT(ap->alen); | |
2545 | } | |
2546 | nullfb = ap->firstblock == NULLFSBLOCK; | |
2547 | fb_agno = nullfb ? NULLAGNUMBER : XFS_FSB_TO_AGNO(mp, ap->firstblock); | |
2a82b8be DC |
2548 | if (nullfb) { |
2549 | if (ap->userdata && xfs_inode_is_filestream(ap->ip)) { | |
2550 | ag = xfs_filestream_lookup_ag(ap->ip); | |
2551 | ag = (ag != NULLAGNUMBER) ? ag : 0; | |
2552 | ap->rval = XFS_AGB_TO_FSB(mp, ag, 0); | |
2553 | } else { | |
2554 | ap->rval = XFS_INO_TO_FSB(mp, ap->ip->i_ino); | |
2555 | } | |
2556 | } else | |
a365bdd5 NS |
2557 | ap->rval = ap->firstblock; |
2558 | ||
2559 | xfs_bmap_adjacent(ap); | |
2560 | ||
1da177e4 LT |
2561 | /* |
2562 | * If allowed, use ap->rval; otherwise must use firstblock since | |
2563 | * it's in the right allocation group. | |
2564 | */ | |
a365bdd5 | 2565 | if (nullfb || XFS_FSB_TO_AGNO(mp, ap->rval) == fb_agno) |
1da177e4 LT |
2566 | ; |
2567 | else | |
2568 | ap->rval = ap->firstblock; | |
2569 | /* | |
a365bdd5 | 2570 | * Normal allocation, done through xfs_alloc_vextent. |
1da177e4 | 2571 | */ |
a365bdd5 NS |
2572 | tryagain = isaligned = 0; |
2573 | args.tp = ap->tp; | |
2574 | args.mp = mp; | |
2575 | args.fsbno = ap->rval; | |
2576 | args.maxlen = MIN(ap->alen, mp->m_sb.sb_agblocks); | |
d210a28c | 2577 | args.firstblock = ap->firstblock; |
a365bdd5 NS |
2578 | blen = 0; |
2579 | if (nullfb) { | |
c467c049 CH |
2580 | error = xfs_bmap_btalloc_nullfb(ap, &args, &blen); |
2581 | if (error) | |
2582 | return error; | |
a365bdd5 | 2583 | } else if (ap->low) { |
2a82b8be DC |
2584 | if (xfs_inode_is_filestream(ap->ip)) |
2585 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
2586 | else | |
2587 | args.type = XFS_ALLOCTYPE_START_BNO; | |
a365bdd5 NS |
2588 | args.total = args.minlen = ap->minlen; |
2589 | } else { | |
2590 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
2591 | args.total = ap->total; | |
2592 | args.minlen = ap->minlen; | |
2593 | } | |
957d0ebe DC |
2594 | /* apply extent size hints if obtained earlier */ |
2595 | if (unlikely(align)) { | |
2596 | args.prod = align; | |
a365bdd5 NS |
2597 | if ((args.mod = (xfs_extlen_t)do_mod(ap->off, args.prod))) |
2598 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
e6a4b37f | 2599 | } else if (mp->m_sb.sb_blocksize >= PAGE_CACHE_SIZE) { |
a365bdd5 NS |
2600 | args.prod = 1; |
2601 | args.mod = 0; | |
2602 | } else { | |
e6a4b37f | 2603 | args.prod = PAGE_CACHE_SIZE >> mp->m_sb.sb_blocklog; |
a365bdd5 NS |
2604 | if ((args.mod = (xfs_extlen_t)(do_mod(ap->off, args.prod)))) |
2605 | args.mod = (xfs_extlen_t)(args.prod - args.mod); | |
1da177e4 LT |
2606 | } |
2607 | /* | |
a365bdd5 NS |
2608 | * If we are not low on available data blocks, and the |
2609 | * underlying logical volume manager is a stripe, and | |
2610 | * the file offset is zero then try to allocate data | |
2611 | * blocks on stripe unit boundary. | |
2612 | * NOTE: ap->aeof is only set if the allocation length | |
2613 | * is >= the stripe unit and the allocation offset is | |
2614 | * at the end of file. | |
1da177e4 | 2615 | */ |
a365bdd5 NS |
2616 | if (!ap->low && ap->aeof) { |
2617 | if (!ap->off) { | |
2618 | args.alignment = mp->m_dalign; | |
2619 | atype = args.type; | |
2620 | isaligned = 1; | |
1da177e4 | 2621 | /* |
a365bdd5 | 2622 | * Adjust for alignment |
1da177e4 | 2623 | */ |
a365bdd5 NS |
2624 | if (blen > args.alignment && blen <= ap->alen) |
2625 | args.minlen = blen - args.alignment; | |
2626 | args.minalignslop = 0; | |
2627 | } else { | |
1da177e4 | 2628 | /* |
a365bdd5 NS |
2629 | * First try an exact bno allocation. |
2630 | * If it fails then do a near or start bno | |
2631 | * allocation with alignment turned on. | |
1da177e4 | 2632 | */ |
a365bdd5 NS |
2633 | atype = args.type; |
2634 | tryagain = 1; | |
2635 | args.type = XFS_ALLOCTYPE_THIS_BNO; | |
2636 | args.alignment = 1; | |
1da177e4 | 2637 | /* |
a365bdd5 NS |
2638 | * Compute the minlen+alignment for the |
2639 | * next case. Set slop so that the value | |
2640 | * of minlen+alignment+slop doesn't go up | |
2641 | * between the calls. | |
1da177e4 | 2642 | */ |
a365bdd5 NS |
2643 | if (blen > mp->m_dalign && blen <= ap->alen) |
2644 | nextminlen = blen - mp->m_dalign; | |
1da177e4 | 2645 | else |
a365bdd5 NS |
2646 | nextminlen = args.minlen; |
2647 | if (nextminlen + mp->m_dalign > args.minlen + 1) | |
2648 | args.minalignslop = | |
2649 | nextminlen + mp->m_dalign - | |
2650 | args.minlen - 1; | |
2651 | else | |
2652 | args.minalignslop = 0; | |
1da177e4 | 2653 | } |
a365bdd5 NS |
2654 | } else { |
2655 | args.alignment = 1; | |
2656 | args.minalignslop = 0; | |
2657 | } | |
2658 | args.minleft = ap->minleft; | |
2659 | args.wasdel = ap->wasdel; | |
2660 | args.isfl = 0; | |
2661 | args.userdata = ap->userdata; | |
2662 | if ((error = xfs_alloc_vextent(&args))) | |
2663 | return error; | |
2664 | if (tryagain && args.fsbno == NULLFSBLOCK) { | |
1da177e4 | 2665 | /* |
a365bdd5 NS |
2666 | * Exact allocation failed. Now try with alignment |
2667 | * turned on. | |
1da177e4 | 2668 | */ |
a365bdd5 NS |
2669 | args.type = atype; |
2670 | args.fsbno = ap->rval; | |
2671 | args.alignment = mp->m_dalign; | |
2672 | args.minlen = nextminlen; | |
2673 | args.minalignslop = 0; | |
2674 | isaligned = 1; | |
1da177e4 LT |
2675 | if ((error = xfs_alloc_vextent(&args))) |
2676 | return error; | |
a365bdd5 NS |
2677 | } |
2678 | if (isaligned && args.fsbno == NULLFSBLOCK) { | |
2679 | /* | |
2680 | * allocation failed, so turn off alignment and | |
2681 | * try again. | |
2682 | */ | |
2683 | args.type = atype; | |
2684 | args.fsbno = ap->rval; | |
2685 | args.alignment = 0; | |
2686 | if ((error = xfs_alloc_vextent(&args))) | |
2687 | return error; | |
2688 | } | |
2689 | if (args.fsbno == NULLFSBLOCK && nullfb && | |
2690 | args.minlen > ap->minlen) { | |
2691 | args.minlen = ap->minlen; | |
2692 | args.type = XFS_ALLOCTYPE_START_BNO; | |
2693 | args.fsbno = ap->rval; | |
2694 | if ((error = xfs_alloc_vextent(&args))) | |
2695 | return error; | |
2696 | } | |
2697 | if (args.fsbno == NULLFSBLOCK && nullfb) { | |
2698 | args.fsbno = 0; | |
2699 | args.type = XFS_ALLOCTYPE_FIRST_AG; | |
2700 | args.total = ap->minlen; | |
2701 | args.minleft = 0; | |
2702 | if ((error = xfs_alloc_vextent(&args))) | |
2703 | return error; | |
2704 | ap->low = 1; | |
2705 | } | |
2706 | if (args.fsbno != NULLFSBLOCK) { | |
2707 | ap->firstblock = ap->rval = args.fsbno; | |
2708 | ASSERT(nullfb || fb_agno == args.agno || | |
2709 | (ap->low && fb_agno < args.agno)); | |
2710 | ap->alen = args.len; | |
2711 | ap->ip->i_d.di_nblocks += args.len; | |
2712 | xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE); | |
2713 | if (ap->wasdel) | |
2714 | ap->ip->i_delayed_blks -= args.len; | |
2715 | /* | |
2716 | * Adjust the disk quota also. This was reserved | |
2717 | * earlier. | |
2718 | */ | |
7d095257 | 2719 | xfs_trans_mod_dquot_byino(ap->tp, ap->ip, |
a365bdd5 NS |
2720 | ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : |
2721 | XFS_TRANS_DQ_BCOUNT, | |
2722 | (long) args.len); | |
2723 | } else { | |
2724 | ap->rval = NULLFSBLOCK; | |
2725 | ap->alen = 0; | |
1da177e4 LT |
2726 | } |
2727 | return 0; | |
a365bdd5 NS |
2728 | } |
2729 | ||
2730 | /* | |
2731 | * xfs_bmap_alloc is called by xfs_bmapi to allocate an extent for a file. | |
2732 | * It figures out where to ask the underlying allocator to put the new extent. | |
2733 | */ | |
2734 | STATIC int | |
2735 | xfs_bmap_alloc( | |
2736 | xfs_bmalloca_t *ap) /* bmap alloc argument struct */ | |
2737 | { | |
71ddabb9 | 2738 | if (XFS_IS_REALTIME_INODE(ap->ip) && ap->userdata) |
a365bdd5 NS |
2739 | return xfs_bmap_rtalloc(ap); |
2740 | return xfs_bmap_btalloc(ap); | |
1da177e4 LT |
2741 | } |
2742 | ||
2743 | /* | |
2744 | * Transform a btree format file with only one leaf node, where the | |
2745 | * extents list will fit in the inode, into an extents format file. | |
4eea22f0 | 2746 | * Since the file extents are already in-core, all we have to do is |
1da177e4 LT |
2747 | * give up the space for the btree root and pitch the leaf block. |
2748 | */ | |
2749 | STATIC int /* error */ | |
2750 | xfs_bmap_btree_to_extents( | |
2751 | xfs_trans_t *tp, /* transaction pointer */ | |
2752 | xfs_inode_t *ip, /* incore inode pointer */ | |
2753 | xfs_btree_cur_t *cur, /* btree cursor */ | |
2754 | int *logflagsp, /* inode logging flags */ | |
2755 | int whichfork) /* data or attr fork */ | |
2756 | { | |
2757 | /* REFERENCED */ | |
7cc95a82 | 2758 | struct xfs_btree_block *cblock;/* child btree block */ |
1da177e4 LT |
2759 | xfs_fsblock_t cbno; /* child block number */ |
2760 | xfs_buf_t *cbp; /* child block's buffer */ | |
2761 | int error; /* error return value */ | |
2762 | xfs_ifork_t *ifp; /* inode fork data */ | |
2763 | xfs_mount_t *mp; /* mount point structure */ | |
576039cf | 2764 | __be64 *pp; /* ptr to block address */ |
7cc95a82 | 2765 | struct xfs_btree_block *rblock;/* root btree block */ |
1da177e4 | 2766 | |
60197e8d | 2767 | mp = ip->i_mount; |
1da177e4 LT |
2768 | ifp = XFS_IFORK_PTR(ip, whichfork); |
2769 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
2770 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
2771 | rblock = ifp->if_broot; | |
16259e7d CH |
2772 | ASSERT(be16_to_cpu(rblock->bb_level) == 1); |
2773 | ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1); | |
60197e8d CH |
2774 | ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1); |
2775 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes); | |
576039cf | 2776 | cbno = be64_to_cpu(*pp); |
1da177e4 LT |
2777 | *logflagsp = 0; |
2778 | #ifdef DEBUG | |
576039cf | 2779 | if ((error = xfs_btree_check_lptr(cur, cbno, 1))) |
1da177e4 LT |
2780 | return error; |
2781 | #endif | |
1da177e4 LT |
2782 | if ((error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, |
2783 | XFS_BMAP_BTREE_REF))) | |
2784 | return error; | |
7cc95a82 CH |
2785 | cblock = XFS_BUF_TO_BLOCK(cbp); |
2786 | if ((error = xfs_btree_check_block(cur, cblock, 0, cbp))) | |
1da177e4 LT |
2787 | return error; |
2788 | xfs_bmap_add_free(cbno, 1, cur->bc_private.b.flist, mp); | |
2789 | ip->i_d.di_nblocks--; | |
7d095257 | 2790 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, -1L); |
1da177e4 LT |
2791 | xfs_trans_binval(tp, cbp); |
2792 | if (cur->bc_bufs[0] == cbp) | |
2793 | cur->bc_bufs[0] = NULL; | |
2794 | xfs_iroot_realloc(ip, -1, whichfork); | |
2795 | ASSERT(ifp->if_broot == NULL); | |
2796 | ASSERT((ifp->if_flags & XFS_IFBROOT) == 0); | |
2797 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
9d87c319 | 2798 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork); |
1da177e4 LT |
2799 | return 0; |
2800 | } | |
2801 | ||
2802 | /* | |
4eea22f0 | 2803 | * Called by xfs_bmapi to update file extent records and the btree |
1da177e4 LT |
2804 | * after removing space (or undoing a delayed allocation). |
2805 | */ | |
2806 | STATIC int /* error */ | |
2807 | xfs_bmap_del_extent( | |
2808 | xfs_inode_t *ip, /* incore inode pointer */ | |
2809 | xfs_trans_t *tp, /* current transaction pointer */ | |
2810 | xfs_extnum_t idx, /* extent number to update/delete */ | |
2811 | xfs_bmap_free_t *flist, /* list of extents to be freed */ | |
2812 | xfs_btree_cur_t *cur, /* if null, not a btree */ | |
4eea22f0 | 2813 | xfs_bmbt_irec_t *del, /* data to remove from extents */ |
1da177e4 LT |
2814 | int *logflagsp, /* inode logging flags */ |
2815 | int whichfork, /* data or attr fork */ | |
2816 | int rsvd) /* OK to allocate reserved blocks */ | |
2817 | { | |
2818 | xfs_filblks_t da_new; /* new delay-alloc indirect blocks */ | |
2819 | xfs_filblks_t da_old; /* old delay-alloc indirect blocks */ | |
2820 | xfs_fsblock_t del_endblock=0; /* first block past del */ | |
2821 | xfs_fileoff_t del_endoff; /* first offset past del */ | |
2822 | int delay; /* current block is delayed allocated */ | |
2823 | int do_fx; /* free extent at end of routine */ | |
a6f64d4a | 2824 | xfs_bmbt_rec_host_t *ep; /* current extent entry pointer */ |
1da177e4 LT |
2825 | int error; /* error return value */ |
2826 | int flags; /* inode logging flags */ | |
1da177e4 LT |
2827 | xfs_bmbt_irec_t got; /* current extent entry */ |
2828 | xfs_fileoff_t got_endoff; /* first offset past got */ | |
2829 | int i; /* temp state */ | |
2830 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
2831 | xfs_mount_t *mp; /* mount structure */ | |
2832 | xfs_filblks_t nblks; /* quota/sb block count */ | |
2833 | xfs_bmbt_irec_t new; /* new record to be inserted */ | |
2834 | /* REFERENCED */ | |
1da177e4 LT |
2835 | uint qfield; /* quota field to update */ |
2836 | xfs_filblks_t temp; /* for indirect length calculations */ | |
2837 | xfs_filblks_t temp2; /* for indirect length calculations */ | |
0b1b213f | 2838 | int state = 0; |
1da177e4 LT |
2839 | |
2840 | XFS_STATS_INC(xs_del_exlist); | |
0b1b213f CH |
2841 | |
2842 | if (whichfork == XFS_ATTR_FORK) | |
2843 | state |= BMAP_ATTRFORK; | |
2844 | ||
1da177e4 LT |
2845 | mp = ip->i_mount; |
2846 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4eea22f0 MK |
2847 | ASSERT((idx >= 0) && (idx < ifp->if_bytes / |
2848 | (uint)sizeof(xfs_bmbt_rec_t))); | |
1da177e4 | 2849 | ASSERT(del->br_blockcount > 0); |
4eea22f0 | 2850 | ep = xfs_iext_get_ext(ifp, idx); |
1da177e4 LT |
2851 | xfs_bmbt_get_all(ep, &got); |
2852 | ASSERT(got.br_startoff <= del->br_startoff); | |
2853 | del_endoff = del->br_startoff + del->br_blockcount; | |
2854 | got_endoff = got.br_startoff + got.br_blockcount; | |
2855 | ASSERT(got_endoff >= del_endoff); | |
9d87c319 ES |
2856 | delay = isnullstartblock(got.br_startblock); |
2857 | ASSERT(isnullstartblock(del->br_startblock) == delay); | |
1da177e4 LT |
2858 | flags = 0; |
2859 | qfield = 0; | |
2860 | error = 0; | |
2861 | /* | |
2862 | * If deleting a real allocation, must free up the disk space. | |
2863 | */ | |
2864 | if (!delay) { | |
2865 | flags = XFS_ILOG_CORE; | |
2866 | /* | |
2867 | * Realtime allocation. Free it and record di_nblocks update. | |
2868 | */ | |
71ddabb9 | 2869 | if (whichfork == XFS_DATA_FORK && XFS_IS_REALTIME_INODE(ip)) { |
1da177e4 LT |
2870 | xfs_fsblock_t bno; |
2871 | xfs_filblks_t len; | |
2872 | ||
2873 | ASSERT(do_mod(del->br_blockcount, | |
2874 | mp->m_sb.sb_rextsize) == 0); | |
2875 | ASSERT(do_mod(del->br_startblock, | |
2876 | mp->m_sb.sb_rextsize) == 0); | |
2877 | bno = del->br_startblock; | |
2878 | len = del->br_blockcount; | |
2879 | do_div(bno, mp->m_sb.sb_rextsize); | |
2880 | do_div(len, mp->m_sb.sb_rextsize); | |
2881 | if ((error = xfs_rtfree_extent(ip->i_transp, bno, | |
2882 | (xfs_extlen_t)len))) | |
2883 | goto done; | |
2884 | do_fx = 0; | |
2885 | nblks = len * mp->m_sb.sb_rextsize; | |
2886 | qfield = XFS_TRANS_DQ_RTBCOUNT; | |
2887 | } | |
2888 | /* | |
2889 | * Ordinary allocation. | |
2890 | */ | |
2891 | else { | |
2892 | do_fx = 1; | |
2893 | nblks = del->br_blockcount; | |
2894 | qfield = XFS_TRANS_DQ_BCOUNT; | |
2895 | } | |
2896 | /* | |
2897 | * Set up del_endblock and cur for later. | |
2898 | */ | |
2899 | del_endblock = del->br_startblock + del->br_blockcount; | |
2900 | if (cur) { | |
2901 | if ((error = xfs_bmbt_lookup_eq(cur, got.br_startoff, | |
2902 | got.br_startblock, got.br_blockcount, | |
2903 | &i))) | |
2904 | goto done; | |
6bd8fc8a | 2905 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
2906 | } |
2907 | da_old = da_new = 0; | |
2908 | } else { | |
9d87c319 | 2909 | da_old = startblockval(got.br_startblock); |
1da177e4 LT |
2910 | da_new = 0; |
2911 | nblks = 0; | |
2912 | do_fx = 0; | |
2913 | } | |
2914 | /* | |
2915 | * Set flag value to use in switch statement. | |
2916 | * Left-contig is 2, right-contig is 1. | |
2917 | */ | |
2918 | switch (((got.br_startoff == del->br_startoff) << 1) | | |
2919 | (got_endoff == del_endoff)) { | |
2920 | case 3: | |
2921 | /* | |
2922 | * Matches the whole extent. Delete the entry. | |
2923 | */ | |
6ef35544 CH |
2924 | xfs_iext_remove(ip, idx, 1, |
2925 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0); | |
1da177e4 LT |
2926 | ifp->if_lastex = idx; |
2927 | if (delay) | |
2928 | break; | |
2929 | XFS_IFORK_NEXT_SET(ip, whichfork, | |
2930 | XFS_IFORK_NEXTENTS(ip, whichfork) - 1); | |
2931 | flags |= XFS_ILOG_CORE; | |
2932 | if (!cur) { | |
9d87c319 | 2933 | flags |= xfs_ilog_fext(whichfork); |
1da177e4 LT |
2934 | break; |
2935 | } | |
91cca5df | 2936 | if ((error = xfs_btree_delete(cur, &i))) |
1da177e4 | 2937 | goto done; |
6bd8fc8a | 2938 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
2939 | break; |
2940 | ||
2941 | case 2: | |
2942 | /* | |
2943 | * Deleting the first part of the extent. | |
2944 | */ | |
0b1b213f | 2945 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
2946 | xfs_bmbt_set_startoff(ep, del_endoff); |
2947 | temp = got.br_blockcount - del->br_blockcount; | |
2948 | xfs_bmbt_set_blockcount(ep, temp); | |
2949 | ifp->if_lastex = idx; | |
2950 | if (delay) { | |
2951 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
2952 | da_old); | |
9d87c319 | 2953 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); |
0b1b213f | 2954 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
2955 | da_new = temp; |
2956 | break; | |
2957 | } | |
2958 | xfs_bmbt_set_startblock(ep, del_endblock); | |
0b1b213f | 2959 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1da177e4 | 2960 | if (!cur) { |
9d87c319 | 2961 | flags |= xfs_ilog_fext(whichfork); |
1da177e4 LT |
2962 | break; |
2963 | } | |
2964 | if ((error = xfs_bmbt_update(cur, del_endoff, del_endblock, | |
2965 | got.br_blockcount - del->br_blockcount, | |
2966 | got.br_state))) | |
2967 | goto done; | |
2968 | break; | |
2969 | ||
2970 | case 1: | |
2971 | /* | |
2972 | * Deleting the last part of the extent. | |
2973 | */ | |
2974 | temp = got.br_blockcount - del->br_blockcount; | |
0b1b213f | 2975 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
2976 | xfs_bmbt_set_blockcount(ep, temp); |
2977 | ifp->if_lastex = idx; | |
2978 | if (delay) { | |
2979 | temp = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp), | |
2980 | da_old); | |
9d87c319 | 2981 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); |
0b1b213f | 2982 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
2983 | da_new = temp; |
2984 | break; | |
2985 | } | |
0b1b213f | 2986 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
1da177e4 | 2987 | if (!cur) { |
9d87c319 | 2988 | flags |= xfs_ilog_fext(whichfork); |
1da177e4 LT |
2989 | break; |
2990 | } | |
2991 | if ((error = xfs_bmbt_update(cur, got.br_startoff, | |
2992 | got.br_startblock, | |
2993 | got.br_blockcount - del->br_blockcount, | |
2994 | got.br_state))) | |
2995 | goto done; | |
2996 | break; | |
2997 | ||
2998 | case 0: | |
2999 | /* | |
3000 | * Deleting the middle of the extent. | |
3001 | */ | |
3002 | temp = del->br_startoff - got.br_startoff; | |
0b1b213f | 3003 | trace_xfs_bmap_pre_update(ip, idx, state, _THIS_IP_); |
1da177e4 LT |
3004 | xfs_bmbt_set_blockcount(ep, temp); |
3005 | new.br_startoff = del_endoff; | |
3006 | temp2 = got_endoff - del_endoff; | |
3007 | new.br_blockcount = temp2; | |
3008 | new.br_state = got.br_state; | |
3009 | if (!delay) { | |
3010 | new.br_startblock = del_endblock; | |
3011 | flags |= XFS_ILOG_CORE; | |
3012 | if (cur) { | |
3013 | if ((error = xfs_bmbt_update(cur, | |
3014 | got.br_startoff, | |
3015 | got.br_startblock, temp, | |
3016 | got.br_state))) | |
3017 | goto done; | |
637aa50f | 3018 | if ((error = xfs_btree_increment(cur, 0, &i))) |
1da177e4 LT |
3019 | goto done; |
3020 | cur->bc_rec.b = new; | |
4b22a571 | 3021 | error = xfs_btree_insert(cur, &i); |
1da177e4 LT |
3022 | if (error && error != ENOSPC) |
3023 | goto done; | |
3024 | /* | |
3025 | * If get no-space back from btree insert, | |
3026 | * it tried a split, and we have a zero | |
3027 | * block reservation. | |
3028 | * Fix up our state and return the error. | |
3029 | */ | |
3030 | if (error == ENOSPC) { | |
3031 | /* | |
3032 | * Reset the cursor, don't trust | |
3033 | * it after any insert operation. | |
3034 | */ | |
3035 | if ((error = xfs_bmbt_lookup_eq(cur, | |
3036 | got.br_startoff, | |
3037 | got.br_startblock, | |
3038 | temp, &i))) | |
3039 | goto done; | |
6bd8fc8a | 3040 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 LT |
3041 | /* |
3042 | * Update the btree record back | |
3043 | * to the original value. | |
3044 | */ | |
3045 | if ((error = xfs_bmbt_update(cur, | |
3046 | got.br_startoff, | |
3047 | got.br_startblock, | |
3048 | got.br_blockcount, | |
3049 | got.br_state))) | |
3050 | goto done; | |
3051 | /* | |
3052 | * Reset the extent record back | |
3053 | * to the original value. | |
3054 | */ | |
3055 | xfs_bmbt_set_blockcount(ep, | |
3056 | got.br_blockcount); | |
3057 | flags = 0; | |
3058 | error = XFS_ERROR(ENOSPC); | |
3059 | goto done; | |
3060 | } | |
6bd8fc8a | 3061 | XFS_WANT_CORRUPTED_GOTO(i == 1, done); |
1da177e4 | 3062 | } else |
9d87c319 | 3063 | flags |= xfs_ilog_fext(whichfork); |
1da177e4 LT |
3064 | XFS_IFORK_NEXT_SET(ip, whichfork, |
3065 | XFS_IFORK_NEXTENTS(ip, whichfork) + 1); | |
3066 | } else { | |
3067 | ASSERT(whichfork == XFS_DATA_FORK); | |
3068 | temp = xfs_bmap_worst_indlen(ip, temp); | |
9d87c319 | 3069 | xfs_bmbt_set_startblock(ep, nullstartblock((int)temp)); |
1da177e4 | 3070 | temp2 = xfs_bmap_worst_indlen(ip, temp2); |
9d87c319 | 3071 | new.br_startblock = nullstartblock((int)temp2); |
1da177e4 LT |
3072 | da_new = temp + temp2; |
3073 | while (da_new > da_old) { | |
3074 | if (temp) { | |
3075 | temp--; | |
3076 | da_new--; | |
3077 | xfs_bmbt_set_startblock(ep, | |
9d87c319 | 3078 | nullstartblock((int)temp)); |
1da177e4 LT |
3079 | } |
3080 | if (da_new == da_old) | |
3081 | break; | |
3082 | if (temp2) { | |
3083 | temp2--; | |
3084 | da_new--; | |
3085 | new.br_startblock = | |
9d87c319 | 3086 | nullstartblock((int)temp2); |
1da177e4 LT |
3087 | } |
3088 | } | |
3089 | } | |
0b1b213f CH |
3090 | trace_xfs_bmap_post_update(ip, idx, state, _THIS_IP_); |
3091 | xfs_iext_insert(ip, idx + 1, 1, &new, state); | |
1da177e4 LT |
3092 | ifp->if_lastex = idx + 1; |
3093 | break; | |
3094 | } | |
3095 | /* | |
3096 | * If we need to, add to list of extents to delete. | |
3097 | */ | |
3098 | if (do_fx) | |
3099 | xfs_bmap_add_free(del->br_startblock, del->br_blockcount, flist, | |
3100 | mp); | |
3101 | /* | |
3102 | * Adjust inode # blocks in the file. | |
3103 | */ | |
3104 | if (nblks) | |
3105 | ip->i_d.di_nblocks -= nblks; | |
3106 | /* | |
3107 | * Adjust quota data. | |
3108 | */ | |
3109 | if (qfield) | |
7d095257 | 3110 | xfs_trans_mod_dquot_byino(tp, ip, qfield, (long)-nblks); |
1da177e4 LT |
3111 | |
3112 | /* | |
3113 | * Account for change in delayed indirect blocks. | |
3114 | * Nothing to do for disk quota accounting here. | |
3115 | */ | |
3116 | ASSERT(da_old >= da_new); | |
96540c78 CH |
3117 | if (da_old > da_new) { |
3118 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, | |
3119 | (int64_t)(da_old - da_new), rsvd); | |
3120 | } | |
1da177e4 LT |
3121 | done: |
3122 | *logflagsp = flags; | |
3123 | return error; | |
3124 | } | |
3125 | ||
3126 | /* | |
3127 | * Remove the entry "free" from the free item list. Prev points to the | |
3128 | * previous entry, unless "free" is the head of the list. | |
3129 | */ | |
3130 | STATIC void | |
3131 | xfs_bmap_del_free( | |
3132 | xfs_bmap_free_t *flist, /* free item list header */ | |
3133 | xfs_bmap_free_item_t *prev, /* previous item on list, if any */ | |
3134 | xfs_bmap_free_item_t *free) /* list item to be freed */ | |
3135 | { | |
3136 | if (prev) | |
3137 | prev->xbfi_next = free->xbfi_next; | |
3138 | else | |
3139 | flist->xbf_first = free->xbfi_next; | |
3140 | flist->xbf_count--; | |
3141 | kmem_zone_free(xfs_bmap_free_item_zone, free); | |
3142 | } | |
3143 | ||
1da177e4 LT |
3144 | /* |
3145 | * Convert an extents-format file into a btree-format file. | |
3146 | * The new file will have a root block (in the inode) and a single child block. | |
3147 | */ | |
3148 | STATIC int /* error */ | |
3149 | xfs_bmap_extents_to_btree( | |
3150 | xfs_trans_t *tp, /* transaction pointer */ | |
3151 | xfs_inode_t *ip, /* incore inode pointer */ | |
3152 | xfs_fsblock_t *firstblock, /* first-block-allocated */ | |
3153 | xfs_bmap_free_t *flist, /* blocks freed in xaction */ | |
3154 | xfs_btree_cur_t **curp, /* cursor returned to caller */ | |
3155 | int wasdel, /* converting a delayed alloc */ | |
3156 | int *logflagsp, /* inode logging flags */ | |
3157 | int whichfork) /* data or attr fork */ | |
3158 | { | |
7cc95a82 | 3159 | struct xfs_btree_block *ablock; /* allocated (child) bt block */ |
1da177e4 LT |
3160 | xfs_buf_t *abp; /* buffer for ablock */ |
3161 | xfs_alloc_arg_t args; /* allocation arguments */ | |
3162 | xfs_bmbt_rec_t *arp; /* child record pointer */ | |
7cc95a82 | 3163 | struct xfs_btree_block *block; /* btree root block */ |
1da177e4 | 3164 | xfs_btree_cur_t *cur; /* bmap btree cursor */ |
a6f64d4a | 3165 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ |
1da177e4 | 3166 | int error; /* error return value */ |
4eea22f0 | 3167 | xfs_extnum_t i, cnt; /* extent record index */ |
1da177e4 LT |
3168 | xfs_ifork_t *ifp; /* inode fork pointer */ |
3169 | xfs_bmbt_key_t *kp; /* root block key pointer */ | |
3170 | xfs_mount_t *mp; /* mount structure */ | |
4eea22f0 | 3171 | xfs_extnum_t nextents; /* number of file extents */ |
1da177e4 LT |
3172 | xfs_bmbt_ptr_t *pp; /* root block address pointer */ |
3173 | ||
3174 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
3175 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS); | |
3176 | ASSERT(ifp->if_ext_max == | |
3177 | XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); | |
3178 | /* | |
3179 | * Make space in the inode incore. | |
3180 | */ | |
3181 | xfs_iroot_realloc(ip, 1, whichfork); | |
3182 | ifp->if_flags |= XFS_IFBROOT; | |
7cc95a82 | 3183 | |
1da177e4 LT |
3184 | /* |
3185 | * Fill in the root. | |
3186 | */ | |
3187 | block = ifp->if_broot; | |
16259e7d CH |
3188 | block->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC); |
3189 | block->bb_level = cpu_to_be16(1); | |
3190 | block->bb_numrecs = cpu_to_be16(1); | |
7cc95a82 CH |
3191 | block->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO); |
3192 | block->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO); | |
3193 | ||
1da177e4 LT |
3194 | /* |
3195 | * Need a cursor. Can't allocate until bb_level is filled in. | |
3196 | */ | |
3197 | mp = ip->i_mount; | |
561f7d17 | 3198 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); |
1da177e4 LT |
3199 | cur->bc_private.b.firstblock = *firstblock; |
3200 | cur->bc_private.b.flist = flist; | |
3201 | cur->bc_private.b.flags = wasdel ? XFS_BTCUR_BPRV_WASDEL : 0; | |
3202 | /* | |
3203 | * Convert to a btree with two levels, one record in root. | |
3204 | */ | |
3205 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_BTREE); | |
3206 | args.tp = tp; | |
3207 | args.mp = mp; | |
d210a28c | 3208 | args.firstblock = *firstblock; |
1da177e4 LT |
3209 | if (*firstblock == NULLFSBLOCK) { |
3210 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3211 | args.fsbno = XFS_INO_TO_FSB(mp, ip->i_ino); | |
3212 | } else if (flist->xbf_low) { | |
3213 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3214 | args.fsbno = *firstblock; | |
3215 | } else { | |
3216 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
3217 | args.fsbno = *firstblock; | |
3218 | } | |
3219 | args.minlen = args.maxlen = args.prod = 1; | |
3220 | args.total = args.minleft = args.alignment = args.mod = args.isfl = | |
3221 | args.minalignslop = 0; | |
3222 | args.wasdel = wasdel; | |
3223 | *logflagsp = 0; | |
3224 | if ((error = xfs_alloc_vextent(&args))) { | |
3225 | xfs_iroot_realloc(ip, -1, whichfork); | |
3226 | xfs_btree_del_cursor(cur, XFS_BTREE_ERROR); | |
3227 | return error; | |
3228 | } | |
3229 | /* | |
3230 | * Allocation can't fail, the space was reserved. | |
3231 | */ | |
3232 | ASSERT(args.fsbno != NULLFSBLOCK); | |
3233 | ASSERT(*firstblock == NULLFSBLOCK || | |
3234 | args.agno == XFS_FSB_TO_AGNO(mp, *firstblock) || | |
3235 | (flist->xbf_low && | |
3236 | args.agno > XFS_FSB_TO_AGNO(mp, *firstblock))); | |
3237 | *firstblock = cur->bc_private.b.firstblock = args.fsbno; | |
3238 | cur->bc_private.b.allocated++; | |
3239 | ip->i_d.di_nblocks++; | |
7d095257 | 3240 | xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L); |
1da177e4 LT |
3241 | abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0); |
3242 | /* | |
3243 | * Fill in the child block. | |
3244 | */ | |
7cc95a82 | 3245 | ablock = XFS_BUF_TO_BLOCK(abp); |
16259e7d | 3246 | ablock->bb_magic = cpu_to_be32(XFS_BMAP_MAGIC); |
1da177e4 | 3247 | ablock->bb_level = 0; |
7cc95a82 CH |
3248 | ablock->bb_u.l.bb_leftsib = cpu_to_be64(NULLDFSBNO); |
3249 | ablock->bb_u.l.bb_rightsib = cpu_to_be64(NULLDFSBNO); | |
136341b4 | 3250 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); |
1da177e4 | 3251 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
4eea22f0 MK |
3252 | for (cnt = i = 0; i < nextents; i++) { |
3253 | ep = xfs_iext_get_ext(ifp, i); | |
9d87c319 | 3254 | if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) { |
cd8b0a97 CH |
3255 | arp->l0 = cpu_to_be64(ep->l0); |
3256 | arp->l1 = cpu_to_be64(ep->l1); | |
1da177e4 LT |
3257 | arp++; cnt++; |
3258 | } | |
3259 | } | |
16259e7d | 3260 | ASSERT(cnt == XFS_IFORK_NEXTENTS(ip, whichfork)); |
7cc95a82 CH |
3261 | xfs_btree_set_numrecs(ablock, cnt); |
3262 | ||
1da177e4 LT |
3263 | /* |
3264 | * Fill in the root key and pointer. | |
3265 | */ | |
136341b4 CH |
3266 | kp = XFS_BMBT_KEY_ADDR(mp, block, 1); |
3267 | arp = XFS_BMBT_REC_ADDR(mp, ablock, 1); | |
8801bb99 | 3268 | kp->br_startoff = cpu_to_be64(xfs_bmbt_disk_get_startoff(arp)); |
136341b4 CH |
3269 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, xfs_bmbt_get_maxrecs(cur, |
3270 | be16_to_cpu(block->bb_level))); | |
576039cf | 3271 | *pp = cpu_to_be64(args.fsbno); |
136341b4 | 3272 | |
1da177e4 LT |
3273 | /* |
3274 | * Do all this logging at the end so that | |
3275 | * the root is at the right level. | |
3276 | */ | |
fd6bcc5b CH |
3277 | xfs_btree_log_block(cur, abp, XFS_BB_ALL_BITS); |
3278 | xfs_btree_log_recs(cur, abp, 1, be16_to_cpu(ablock->bb_numrecs)); | |
1da177e4 LT |
3279 | ASSERT(*curp == NULL); |
3280 | *curp = cur; | |
9d87c319 | 3281 | *logflagsp = XFS_ILOG_CORE | xfs_ilog_fbroot(whichfork); |
1da177e4 LT |
3282 | return 0; |
3283 | } | |
3284 | ||
1a5902c5 CH |
3285 | /* |
3286 | * Calculate the default attribute fork offset for newly created inodes. | |
3287 | */ | |
3288 | uint | |
3289 | xfs_default_attroffset( | |
3290 | struct xfs_inode *ip) | |
3291 | { | |
3292 | struct xfs_mount *mp = ip->i_mount; | |
3293 | uint offset; | |
3294 | ||
3295 | if (mp->m_sb.sb_inodesize == 256) { | |
3296 | offset = XFS_LITINO(mp) - | |
3297 | XFS_BMDR_SPACE_CALC(MINABTPTRS); | |
3298 | } else { | |
3299 | offset = XFS_BMDR_SPACE_CALC(6 * MINABTPTRS); | |
3300 | } | |
3301 | ||
3302 | ASSERT(offset < XFS_LITINO(mp)); | |
3303 | return offset; | |
3304 | } | |
3305 | ||
d8cc890d NS |
3306 | /* |
3307 | * Helper routine to reset inode di_forkoff field when switching | |
3308 | * attribute fork from local to extent format - we reset it where | |
3309 | * possible to make space available for inline data fork extents. | |
3310 | */ | |
3311 | STATIC void | |
3312 | xfs_bmap_forkoff_reset( | |
3313 | xfs_mount_t *mp, | |
3314 | xfs_inode_t *ip, | |
3315 | int whichfork) | |
3316 | { | |
3317 | if (whichfork == XFS_ATTR_FORK && | |
1a5902c5 CH |
3318 | ip->i_d.di_format != XFS_DINODE_FMT_DEV && |
3319 | ip->i_d.di_format != XFS_DINODE_FMT_UUID && | |
3320 | ip->i_d.di_format != XFS_DINODE_FMT_BTREE) { | |
3321 | uint dfl_forkoff = xfs_default_attroffset(ip) >> 3; | |
3322 | ||
3323 | if (dfl_forkoff > ip->i_d.di_forkoff) { | |
3324 | ip->i_d.di_forkoff = dfl_forkoff; | |
3325 | ip->i_df.if_ext_max = | |
3326 | XFS_IFORK_DSIZE(ip) / sizeof(xfs_bmbt_rec_t); | |
3327 | ip->i_afp->if_ext_max = | |
3328 | XFS_IFORK_ASIZE(ip) / sizeof(xfs_bmbt_rec_t); | |
3329 | } | |
d8cc890d NS |
3330 | } |
3331 | } | |
3332 | ||
1da177e4 LT |
3333 | /* |
3334 | * Convert a local file to an extents file. | |
3335 | * This code is out of bounds for data forks of regular files, | |
3336 | * since the file data needs to get logged so things will stay consistent. | |
3337 | * (The bmap-level manipulations are ok, though). | |
3338 | */ | |
3339 | STATIC int /* error */ | |
3340 | xfs_bmap_local_to_extents( | |
3341 | xfs_trans_t *tp, /* transaction pointer */ | |
3342 | xfs_inode_t *ip, /* incore inode pointer */ | |
3343 | xfs_fsblock_t *firstblock, /* first block allocated in xaction */ | |
3344 | xfs_extlen_t total, /* total blocks needed by transaction */ | |
3345 | int *logflagsp, /* inode logging flags */ | |
3346 | int whichfork) /* data or attr fork */ | |
3347 | { | |
3348 | int error; /* error return value */ | |
3349 | int flags; /* logging flags returned */ | |
1da177e4 LT |
3350 | xfs_ifork_t *ifp; /* inode fork pointer */ |
3351 | ||
3352 | /* | |
3353 | * We don't want to deal with the case of keeping inode data inline yet. | |
3354 | * So sending the data fork of a regular inode is invalid. | |
3355 | */ | |
3356 | ASSERT(!((ip->i_d.di_mode & S_IFMT) == S_IFREG && | |
3357 | whichfork == XFS_DATA_FORK)); | |
3358 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
3359 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
3360 | flags = 0; | |
3361 | error = 0; | |
3362 | if (ifp->if_bytes) { | |
3363 | xfs_alloc_arg_t args; /* allocation arguments */ | |
4eea22f0 | 3364 | xfs_buf_t *bp; /* buffer for extent block */ |
a6f64d4a | 3365 | xfs_bmbt_rec_host_t *ep;/* extent record pointer */ |
1da177e4 LT |
3366 | |
3367 | args.tp = tp; | |
3368 | args.mp = ip->i_mount; | |
d210a28c | 3369 | args.firstblock = *firstblock; |
f020b67f MK |
3370 | ASSERT((ifp->if_flags & |
3371 | (XFS_IFINLINE|XFS_IFEXTENTS|XFS_IFEXTIREC)) == XFS_IFINLINE); | |
1da177e4 LT |
3372 | /* |
3373 | * Allocate a block. We know we need only one, since the | |
3374 | * file currently fits in an inode. | |
3375 | */ | |
3376 | if (*firstblock == NULLFSBLOCK) { | |
3377 | args.fsbno = XFS_INO_TO_FSB(args.mp, ip->i_ino); | |
3378 | args.type = XFS_ALLOCTYPE_START_BNO; | |
3379 | } else { | |
3380 | args.fsbno = *firstblock; | |
3381 | args.type = XFS_ALLOCTYPE_NEAR_BNO; | |
3382 | } | |
3383 | args.total = total; | |
3384 | args.mod = args.minleft = args.alignment = args.wasdel = | |
3385 | args.isfl = args.minalignslop = 0; | |
3386 | args.minlen = args.maxlen = args.prod = 1; | |
3387 | if ((error = xfs_alloc_vextent(&args))) | |
3388 | goto done; | |
3389 | /* | |
3390 | * Can't fail, the space was reserved. | |
3391 | */ | |
3392 | ASSERT(args.fsbno != NULLFSBLOCK); | |
3393 | ASSERT(args.len == 1); | |
3394 | *firstblock = args.fsbno; | |
3395 | bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0); | |
3396 | memcpy((char *)XFS_BUF_PTR(bp), ifp->if_u1.if_data, | |
3397 | ifp->if_bytes); | |
3398 | xfs_trans_log_buf(tp, bp, 0, ifp->if_bytes - 1); | |
d8cc890d | 3399 | xfs_bmap_forkoff_reset(args.mp, ip, whichfork); |
1da177e4 | 3400 | xfs_idata_realloc(ip, -ifp->if_bytes, whichfork); |
4eea22f0 MK |
3401 | xfs_iext_add(ifp, 0, 1); |
3402 | ep = xfs_iext_get_ext(ifp, 0); | |
1da177e4 | 3403 | xfs_bmbt_set_allf(ep, 0, args.fsbno, 1, XFS_EXT_NORM); |
0b1b213f CH |
3404 | trace_xfs_bmap_post_update(ip, 0, |
3405 | whichfork == XFS_ATTR_FORK ? BMAP_ATTRFORK : 0, | |
3406 | _THIS_IP_); | |
1da177e4 LT |
3407 | XFS_IFORK_NEXT_SET(ip, whichfork, 1); |
3408 | ip->i_d.di_nblocks = 1; | |
7d095257 | 3409 | xfs_trans_mod_dquot_byino(tp, ip, |
1da177e4 | 3410 | XFS_TRANS_DQ_BCOUNT, 1L); |
9d87c319 | 3411 | flags |= xfs_ilog_fext(whichfork); |
d8cc890d | 3412 | } else { |
1da177e4 | 3413 | ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) == 0); |
d8cc890d NS |
3414 | xfs_bmap_forkoff_reset(ip->i_mount, ip, whichfork); |
3415 | } | |
1da177e4 LT |
3416 | ifp->if_flags &= ~XFS_IFINLINE; |
3417 | ifp->if_flags |= XFS_IFEXTENTS; | |
3418 | XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS); | |
3419 | flags |= XFS_ILOG_CORE; | |
3420 | done: | |
3421 | *logflagsp = flags; | |
3422 | return error; | |
3423 | } | |
3424 | ||
0293ce3a | 3425 | /* |
8867bc9b MK |
3426 | * Search the extent records for the entry containing block bno. |
3427 | * If bno lies in a hole, point to the next entry. If bno lies | |
3428 | * past eof, *eofp will be set, and *prevp will contain the last | |
3429 | * entry (null if none). Else, *lastxp will be set to the index | |
3430 | * of the found entry; *gotp will contain the entry. | |
0293ce3a | 3431 | */ |
d96f8f89 | 3432 | STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */ |
0293ce3a MK |
3433 | xfs_bmap_search_multi_extents( |
3434 | xfs_ifork_t *ifp, /* inode fork pointer */ | |
3435 | xfs_fileoff_t bno, /* block number searched for */ | |
3436 | int *eofp, /* out: end of file found */ | |
3437 | xfs_extnum_t *lastxp, /* out: last extent index */ | |
3438 | xfs_bmbt_irec_t *gotp, /* out: extent entry found */ | |
3439 | xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ | |
3440 | { | |
a6f64d4a | 3441 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ |
0293ce3a | 3442 | xfs_extnum_t lastx; /* last extent index */ |
0293ce3a MK |
3443 | |
3444 | /* | |
8867bc9b MK |
3445 | * Initialize the extent entry structure to catch access to |
3446 | * uninitialized br_startblock field. | |
0293ce3a | 3447 | */ |
8867bc9b MK |
3448 | gotp->br_startoff = 0xffa5a5a5a5a5a5a5LL; |
3449 | gotp->br_blockcount = 0xa55a5a5a5a5a5a5aLL; | |
3450 | gotp->br_state = XFS_EXT_INVALID; | |
3451 | #if XFS_BIG_BLKNOS | |
3452 | gotp->br_startblock = 0xffffa5a5a5a5a5a5LL; | |
3453 | #else | |
3454 | gotp->br_startblock = 0xffffa5a5; | |
3455 | #endif | |
3456 | prevp->br_startoff = NULLFILEOFF; | |
3457 | ||
3458 | ep = xfs_iext_bno_to_ext(ifp, bno, &lastx); | |
3459 | if (lastx > 0) { | |
3460 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp); | |
0293ce3a | 3461 | } |
8867bc9b MK |
3462 | if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) { |
3463 | xfs_bmbt_get_all(ep, gotp); | |
3464 | *eofp = 0; | |
3465 | } else { | |
3466 | if (lastx > 0) { | |
3467 | *gotp = *prevp; | |
3468 | } | |
3469 | *eofp = 1; | |
3470 | ep = NULL; | |
0293ce3a | 3471 | } |
8867bc9b | 3472 | *lastxp = lastx; |
0293ce3a MK |
3473 | return ep; |
3474 | } | |
3475 | ||
1da177e4 LT |
3476 | /* |
3477 | * Search the extents list for the inode, for the extent containing bno. | |
3478 | * If bno lies in a hole, point to the next entry. If bno lies past eof, | |
3479 | * *eofp will be set, and *prevp will contain the last entry (null if none). | |
3480 | * Else, *lastxp will be set to the index of the found | |
3481 | * entry; *gotp will contain the entry. | |
3482 | */ | |
a6f64d4a | 3483 | STATIC xfs_bmbt_rec_host_t * /* pointer to found extent entry */ |
1da177e4 LT |
3484 | xfs_bmap_search_extents( |
3485 | xfs_inode_t *ip, /* incore inode pointer */ | |
3486 | xfs_fileoff_t bno, /* block number searched for */ | |
572d95f4 | 3487 | int fork, /* data or attr fork */ |
1da177e4 LT |
3488 | int *eofp, /* out: end of file found */ |
3489 | xfs_extnum_t *lastxp, /* out: last extent index */ | |
3490 | xfs_bmbt_irec_t *gotp, /* out: extent entry found */ | |
3491 | xfs_bmbt_irec_t *prevp) /* out: previous extent entry found */ | |
3492 | { | |
3493 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
a6f64d4a | 3494 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ |
1da177e4 LT |
3495 | |
3496 | XFS_STATS_INC(xs_look_exlist); | |
572d95f4 | 3497 | ifp = XFS_IFORK_PTR(ip, fork); |
1da177e4 | 3498 | |
0293ce3a MK |
3499 | ep = xfs_bmap_search_multi_extents(ifp, bno, eofp, lastxp, gotp, prevp); |
3500 | ||
572d95f4 NS |
3501 | if (unlikely(!(gotp->br_startblock) && (*lastxp != NULLEXTNUM) && |
3502 | !(XFS_IS_REALTIME_INODE(ip) && fork == XFS_DATA_FORK))) { | |
3503 | xfs_cmn_err(XFS_PTAG_FSBLOCK_ZERO, CE_ALERT, ip->i_mount, | |
3504 | "Access to block zero in inode %llu " | |
3505 | "start_block: %llx start_off: %llx " | |
3506 | "blkcnt: %llx extent-state: %x lastx: %x\n", | |
3507 | (unsigned long long)ip->i_ino, | |
3ddb8fa9 NS |
3508 | (unsigned long long)gotp->br_startblock, |
3509 | (unsigned long long)gotp->br_startoff, | |
3510 | (unsigned long long)gotp->br_blockcount, | |
572d95f4 NS |
3511 | gotp->br_state, *lastxp); |
3512 | *lastxp = NULLEXTNUM; | |
3513 | *eofp = 1; | |
3514 | return NULL; | |
3515 | } | |
3516 | return ep; | |
1da177e4 LT |
3517 | } |
3518 | ||
1da177e4 LT |
3519 | /* |
3520 | * Compute the worst-case number of indirect blocks that will be used | |
3521 | * for ip's delayed extent of length "len". | |
3522 | */ | |
3523 | STATIC xfs_filblks_t | |
3524 | xfs_bmap_worst_indlen( | |
3525 | xfs_inode_t *ip, /* incore inode pointer */ | |
3526 | xfs_filblks_t len) /* delayed extent length */ | |
3527 | { | |
3528 | int level; /* btree level number */ | |
3529 | int maxrecs; /* maximum record count at this level */ | |
3530 | xfs_mount_t *mp; /* mount structure */ | |
3531 | xfs_filblks_t rval; /* return value */ | |
3532 | ||
3533 | mp = ip->i_mount; | |
3534 | maxrecs = mp->m_bmap_dmxr[0]; | |
3535 | for (level = 0, rval = 0; | |
3536 | level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK); | |
3537 | level++) { | |
3538 | len += maxrecs - 1; | |
3539 | do_div(len, maxrecs); | |
3540 | rval += len; | |
3541 | if (len == 1) | |
3542 | return rval + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) - | |
3543 | level - 1; | |
3544 | if (level == 0) | |
3545 | maxrecs = mp->m_bmap_dmxr[1]; | |
3546 | } | |
3547 | return rval; | |
3548 | } | |
3549 | ||
1da177e4 LT |
3550 | /* |
3551 | * Convert inode from non-attributed to attributed. | |
3552 | * Must not be in a transaction, ip must not be locked. | |
3553 | */ | |
3554 | int /* error code */ | |
3555 | xfs_bmap_add_attrfork( | |
3556 | xfs_inode_t *ip, /* incore inode pointer */ | |
d8cc890d NS |
3557 | int size, /* space new attribute needs */ |
3558 | int rsvd) /* xact may use reserved blks */ | |
1da177e4 | 3559 | { |
1da177e4 | 3560 | xfs_fsblock_t firstblock; /* 1st block/ag allocated */ |
4eea22f0 | 3561 | xfs_bmap_free_t flist; /* freed extent records */ |
1da177e4 | 3562 | xfs_mount_t *mp; /* mount structure */ |
1da177e4 | 3563 | xfs_trans_t *tp; /* transaction pointer */ |
d8cc890d NS |
3564 | int blks; /* space reservation */ |
3565 | int version = 1; /* superblock attr version */ | |
3566 | int committed; /* xaction was committed */ | |
3567 | int logflags; /* logging flags */ | |
3568 | int error; /* error return value */ | |
1da177e4 | 3569 | |
d8cc890d | 3570 | ASSERT(XFS_IFORK_Q(ip) == 0); |
1da177e4 LT |
3571 | ASSERT(ip->i_df.if_ext_max == |
3572 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t)); | |
d8cc890d | 3573 | |
1da177e4 LT |
3574 | mp = ip->i_mount; |
3575 | ASSERT(!XFS_NOT_DQATTACHED(mp, ip)); | |
3576 | tp = xfs_trans_alloc(mp, XFS_TRANS_ADDAFORK); | |
3577 | blks = XFS_ADDAFORK_SPACE_RES(mp); | |
3578 | if (rsvd) | |
3579 | tp->t_flags |= XFS_TRANS_RESERVE; | |
3580 | if ((error = xfs_trans_reserve(tp, blks, XFS_ADDAFORK_LOG_RES(mp), 0, | |
3581 | XFS_TRANS_PERM_LOG_RES, XFS_ADDAFORK_LOG_COUNT))) | |
3582 | goto error0; | |
3583 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
7d095257 | 3584 | error = xfs_trans_reserve_quota_nblks(tp, ip, blks, 0, rsvd ? |
1da177e4 LT |
3585 | XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES : |
3586 | XFS_QMOPT_RES_REGBLKS); | |
3587 | if (error) { | |
3588 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
3589 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES); | |
3590 | return error; | |
3591 | } | |
3592 | if (XFS_IFORK_Q(ip)) | |
3593 | goto error1; | |
3594 | if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS) { | |
3595 | /* | |
3596 | * For inodes coming from pre-6.2 filesystems. | |
3597 | */ | |
3598 | ASSERT(ip->i_d.di_aformat == 0); | |
3599 | ip->i_d.di_aformat = XFS_DINODE_FMT_EXTENTS; | |
3600 | } | |
3601 | ASSERT(ip->i_d.di_anextents == 0); | |
898621d5 CH |
3602 | |
3603 | xfs_trans_ijoin_ref(tp, ip, XFS_ILOCK_EXCL); | |
1da177e4 | 3604 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
898621d5 | 3605 | |
1da177e4 LT |
3606 | switch (ip->i_d.di_format) { |
3607 | case XFS_DINODE_FMT_DEV: | |
3608 | ip->i_d.di_forkoff = roundup(sizeof(xfs_dev_t), 8) >> 3; | |
3609 | break; | |
3610 | case XFS_DINODE_FMT_UUID: | |
3611 | ip->i_d.di_forkoff = roundup(sizeof(uuid_t), 8) >> 3; | |
3612 | break; | |
3613 | case XFS_DINODE_FMT_LOCAL: | |
3614 | case XFS_DINODE_FMT_EXTENTS: | |
3615 | case XFS_DINODE_FMT_BTREE: | |
d8cc890d NS |
3616 | ip->i_d.di_forkoff = xfs_attr_shortform_bytesfit(ip, size); |
3617 | if (!ip->i_d.di_forkoff) | |
1a5902c5 | 3618 | ip->i_d.di_forkoff = xfs_default_attroffset(ip) >> 3; |
13059ff0 | 3619 | else if (mp->m_flags & XFS_MOUNT_ATTR2) |
d8cc890d | 3620 | version = 2; |
1da177e4 LT |
3621 | break; |
3622 | default: | |
3623 | ASSERT(0); | |
3624 | error = XFS_ERROR(EINVAL); | |
3625 | goto error1; | |
3626 | } | |
3627 | ip->i_df.if_ext_max = | |
3628 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); | |
3629 | ASSERT(ip->i_afp == NULL); | |
3630 | ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP); | |
3631 | ip->i_afp->if_ext_max = | |
3632 | XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t); | |
3633 | ip->i_afp->if_flags = XFS_IFEXTENTS; | |
3634 | logflags = 0; | |
9d87c319 | 3635 | xfs_bmap_init(&flist, &firstblock); |
1da177e4 LT |
3636 | switch (ip->i_d.di_format) { |
3637 | case XFS_DINODE_FMT_LOCAL: | |
3638 | error = xfs_bmap_add_attrfork_local(tp, ip, &firstblock, &flist, | |
3639 | &logflags); | |
3640 | break; | |
3641 | case XFS_DINODE_FMT_EXTENTS: | |
3642 | error = xfs_bmap_add_attrfork_extents(tp, ip, &firstblock, | |
3643 | &flist, &logflags); | |
3644 | break; | |
3645 | case XFS_DINODE_FMT_BTREE: | |
3646 | error = xfs_bmap_add_attrfork_btree(tp, ip, &firstblock, &flist, | |
3647 | &logflags); | |
3648 | break; | |
3649 | default: | |
3650 | error = 0; | |
3651 | break; | |
3652 | } | |
3653 | if (logflags) | |
3654 | xfs_trans_log_inode(tp, ip, logflags); | |
3655 | if (error) | |
3656 | goto error2; | |
62118709 ES |
3657 | if (!xfs_sb_version_hasattr(&mp->m_sb) || |
3658 | (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2)) { | |
da087bad NS |
3659 | __int64_t sbfields = 0; |
3660 | ||
3685c2a1 | 3661 | spin_lock(&mp->m_sb_lock); |
62118709 ES |
3662 | if (!xfs_sb_version_hasattr(&mp->m_sb)) { |
3663 | xfs_sb_version_addattr(&mp->m_sb); | |
da087bad | 3664 | sbfields |= XFS_SB_VERSIONNUM; |
d8cc890d | 3665 | } |
62118709 ES |
3666 | if (!xfs_sb_version_hasattr2(&mp->m_sb) && version == 2) { |
3667 | xfs_sb_version_addattr2(&mp->m_sb); | |
da087bad | 3668 | sbfields |= (XFS_SB_VERSIONNUM | XFS_SB_FEATURES2); |
d8cc890d | 3669 | } |
da087bad | 3670 | if (sbfields) { |
3685c2a1 | 3671 | spin_unlock(&mp->m_sb_lock); |
da087bad | 3672 | xfs_mod_sb(tp, sbfields); |
1da177e4 | 3673 | } else |
3685c2a1 | 3674 | spin_unlock(&mp->m_sb_lock); |
1da177e4 | 3675 | } |
f7c99b6f | 3676 | if ((error = xfs_bmap_finish(&tp, &flist, &committed))) |
1da177e4 | 3677 | goto error2; |
713bf88b | 3678 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
3679 | ASSERT(ip->i_df.if_ext_max == |
3680 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t)); | |
3681 | return error; | |
3682 | error2: | |
3683 | xfs_bmap_cancel(&flist); | |
3684 | error1: | |
1da177e4 LT |
3685 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
3686 | error0: | |
3687 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); | |
3688 | ASSERT(ip->i_df.if_ext_max == | |
3689 | XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t)); | |
3690 | return error; | |
3691 | } | |
3692 | ||
3693 | /* | |
3694 | * Add the extent to the list of extents to be free at transaction end. | |
3695 | * The list is maintained sorted (by block number). | |
3696 | */ | |
3697 | /* ARGSUSED */ | |
3698 | void | |
3699 | xfs_bmap_add_free( | |
3700 | xfs_fsblock_t bno, /* fs block number of extent */ | |
3701 | xfs_filblks_t len, /* length of extent */ | |
3702 | xfs_bmap_free_t *flist, /* list of extents */ | |
3703 | xfs_mount_t *mp) /* mount point structure */ | |
3704 | { | |
3705 | xfs_bmap_free_item_t *cur; /* current (next) element */ | |
3706 | xfs_bmap_free_item_t *new; /* new element */ | |
3707 | xfs_bmap_free_item_t *prev; /* previous element */ | |
3708 | #ifdef DEBUG | |
3709 | xfs_agnumber_t agno; | |
3710 | xfs_agblock_t agbno; | |
3711 | ||
3712 | ASSERT(bno != NULLFSBLOCK); | |
3713 | ASSERT(len > 0); | |
3714 | ASSERT(len <= MAXEXTLEN); | |
9d87c319 | 3715 | ASSERT(!isnullstartblock(bno)); |
1da177e4 LT |
3716 | agno = XFS_FSB_TO_AGNO(mp, bno); |
3717 | agbno = XFS_FSB_TO_AGBNO(mp, bno); | |
3718 | ASSERT(agno < mp->m_sb.sb_agcount); | |
3719 | ASSERT(agbno < mp->m_sb.sb_agblocks); | |
3720 | ASSERT(len < mp->m_sb.sb_agblocks); | |
3721 | ASSERT(agbno + len <= mp->m_sb.sb_agblocks); | |
3722 | #endif | |
3723 | ASSERT(xfs_bmap_free_item_zone != NULL); | |
3724 | new = kmem_zone_alloc(xfs_bmap_free_item_zone, KM_SLEEP); | |
3725 | new->xbfi_startblock = bno; | |
3726 | new->xbfi_blockcount = (xfs_extlen_t)len; | |
3727 | for (prev = NULL, cur = flist->xbf_first; | |
3728 | cur != NULL; | |
3729 | prev = cur, cur = cur->xbfi_next) { | |
3730 | if (cur->xbfi_startblock >= bno) | |
3731 | break; | |
3732 | } | |
3733 | if (prev) | |
3734 | prev->xbfi_next = new; | |
3735 | else | |
3736 | flist->xbf_first = new; | |
3737 | new->xbfi_next = cur; | |
3738 | flist->xbf_count++; | |
3739 | } | |
3740 | ||
3741 | /* | |
3742 | * Compute and fill in the value of the maximum depth of a bmap btree | |
3743 | * in this filesystem. Done once, during mount. | |
3744 | */ | |
3745 | void | |
3746 | xfs_bmap_compute_maxlevels( | |
3747 | xfs_mount_t *mp, /* file system mount structure */ | |
3748 | int whichfork) /* data or attr fork */ | |
3749 | { | |
3750 | int level; /* btree level */ | |
3751 | uint maxblocks; /* max blocks at this level */ | |
3752 | uint maxleafents; /* max leaf entries possible */ | |
3753 | int maxrootrecs; /* max records in root block */ | |
3754 | int minleafrecs; /* min records in leaf block */ | |
3755 | int minnoderecs; /* min records in node block */ | |
3756 | int sz; /* root block size */ | |
3757 | ||
3758 | /* | |
3759 | * The maximum number of extents in a file, hence the maximum | |
3760 | * number of leaf entries, is controlled by the type of di_nextents | |
3761 | * (a signed 32-bit number, xfs_extnum_t), or by di_anextents | |
3762 | * (a signed 16-bit number, xfs_aextnum_t). | |
6d1337b2 TS |
3763 | * |
3764 | * Note that we can no longer assume that if we are in ATTR1 that | |
1a5902c5 CH |
3765 | * the fork offset of all the inodes will be |
3766 | * (xfs_default_attroffset(ip) >> 3) because we could have mounted | |
3767 | * with ATTR2 and then mounted back with ATTR1, keeping the | |
3768 | * di_forkoff's fixed but probably at various positions. Therefore, | |
3769 | * for both ATTR1 and ATTR2 we have to assume the worst case scenario | |
3770 | * of a minimum size available. | |
1da177e4 | 3771 | */ |
d8cc890d NS |
3772 | if (whichfork == XFS_DATA_FORK) { |
3773 | maxleafents = MAXEXTNUM; | |
6d1337b2 | 3774 | sz = XFS_BMDR_SPACE_CALC(MINDBTPTRS); |
d8cc890d NS |
3775 | } else { |
3776 | maxleafents = MAXAEXTNUM; | |
6d1337b2 | 3777 | sz = XFS_BMDR_SPACE_CALC(MINABTPTRS); |
d8cc890d | 3778 | } |
60197e8d | 3779 | maxrootrecs = xfs_bmdr_maxrecs(mp, sz, 0); |
1da177e4 LT |
3780 | minleafrecs = mp->m_bmap_dmnr[0]; |
3781 | minnoderecs = mp->m_bmap_dmnr[1]; | |
1da177e4 LT |
3782 | maxblocks = (maxleafents + minleafrecs - 1) / minleafrecs; |
3783 | for (level = 1; maxblocks > 1; level++) { | |
3784 | if (maxblocks <= maxrootrecs) | |
3785 | maxblocks = 1; | |
3786 | else | |
3787 | maxblocks = (maxblocks + minnoderecs - 1) / minnoderecs; | |
3788 | } | |
3789 | mp->m_bm_maxlevels[whichfork] = level; | |
3790 | } | |
3791 | ||
3792 | /* | |
3793 | * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi | |
3794 | * caller. Frees all the extents that need freeing, which must be done | |
3795 | * last due to locking considerations. We never free any extents in | |
3796 | * the first transaction. This is to allow the caller to make the first | |
3797 | * transaction a synchronous one so that the pointers to the data being | |
3798 | * broken in this transaction will be permanent before the data is actually | |
3799 | * freed. This is necessary to prevent blocks from being reallocated | |
3800 | * and written to before the free and reallocation are actually permanent. | |
3801 | * We do not just make the first transaction synchronous here, because | |
3802 | * there are more efficient ways to gain the same protection in some cases | |
3803 | * (see the file truncation code). | |
3804 | * | |
3805 | * Return 1 if the given transaction was committed and a new one | |
3806 | * started, and 0 otherwise in the committed parameter. | |
3807 | */ | |
3808 | /*ARGSUSED*/ | |
3809 | int /* error */ | |
3810 | xfs_bmap_finish( | |
3811 | xfs_trans_t **tp, /* transaction pointer addr */ | |
3812 | xfs_bmap_free_t *flist, /* i/o: list extents to free */ | |
1da177e4 LT |
3813 | int *committed) /* xact committed or not */ |
3814 | { | |
3815 | xfs_efd_log_item_t *efd; /* extent free data */ | |
3816 | xfs_efi_log_item_t *efi; /* extent free intention */ | |
3817 | int error; /* error return value */ | |
4eea22f0 | 3818 | xfs_bmap_free_item_t *free; /* free extent item */ |
1da177e4 LT |
3819 | unsigned int logres; /* new log reservation */ |
3820 | unsigned int logcount; /* new log count */ | |
3821 | xfs_mount_t *mp; /* filesystem mount structure */ | |
3822 | xfs_bmap_free_item_t *next; /* next item on free list */ | |
3823 | xfs_trans_t *ntp; /* new transaction pointer */ | |
3824 | ||
3825 | ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES); | |
3826 | if (flist->xbf_count == 0) { | |
3827 | *committed = 0; | |
3828 | return 0; | |
3829 | } | |
3830 | ntp = *tp; | |
3831 | efi = xfs_trans_get_efi(ntp, flist->xbf_count); | |
3832 | for (free = flist->xbf_first; free; free = free->xbfi_next) | |
3833 | xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock, | |
3834 | free->xbfi_blockcount); | |
3835 | logres = ntp->t_log_res; | |
3836 | logcount = ntp->t_log_count; | |
3837 | ntp = xfs_trans_dup(*tp); | |
1c72bf90 | 3838 | error = xfs_trans_commit(*tp, 0); |
1da177e4 LT |
3839 | *tp = ntp; |
3840 | *committed = 1; | |
3841 | /* | |
3842 | * We have a new transaction, so we should return committed=1, | |
3843 | * even though we're returning an error. | |
3844 | */ | |
cc09c0dc | 3845 | if (error) |
1da177e4 | 3846 | return error; |
cc09c0dc DC |
3847 | |
3848 | /* | |
3849 | * transaction commit worked ok so we can drop the extra ticket | |
3850 | * reference that we gained in xfs_trans_dup() | |
3851 | */ | |
3852 | xfs_log_ticket_put(ntp->t_ticket); | |
3853 | ||
1da177e4 LT |
3854 | if ((error = xfs_trans_reserve(ntp, 0, logres, 0, XFS_TRANS_PERM_LOG_RES, |
3855 | logcount))) | |
3856 | return error; | |
3857 | efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count); | |
3858 | for (free = flist->xbf_first; free != NULL; free = next) { | |
3859 | next = free->xbfi_next; | |
3860 | if ((error = xfs_free_extent(ntp, free->xbfi_startblock, | |
3861 | free->xbfi_blockcount))) { | |
3862 | /* | |
3863 | * The bmap free list will be cleaned up at a | |
3864 | * higher level. The EFI will be canceled when | |
3865 | * this transaction is aborted. | |
3866 | * Need to force shutdown here to make sure it | |
3867 | * happens, since this transaction may not be | |
3868 | * dirty yet. | |
3869 | */ | |
3870 | mp = ntp->t_mountp; | |
3871 | if (!XFS_FORCED_SHUTDOWN(mp)) | |
3872 | xfs_force_shutdown(mp, | |
3873 | (error == EFSCORRUPTED) ? | |
7d04a335 NS |
3874 | SHUTDOWN_CORRUPT_INCORE : |
3875 | SHUTDOWN_META_IO_ERROR); | |
1da177e4 LT |
3876 | return error; |
3877 | } | |
3878 | xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock, | |
3879 | free->xbfi_blockcount); | |
3880 | xfs_bmap_del_free(flist, NULL, free); | |
3881 | } | |
3882 | return 0; | |
3883 | } | |
3884 | ||
3885 | /* | |
3886 | * Free up any items left in the list. | |
3887 | */ | |
3888 | void | |
3889 | xfs_bmap_cancel( | |
3890 | xfs_bmap_free_t *flist) /* list of bmap_free_items */ | |
3891 | { | |
3892 | xfs_bmap_free_item_t *free; /* free list item */ | |
3893 | xfs_bmap_free_item_t *next; | |
3894 | ||
3895 | if (flist->xbf_count == 0) | |
3896 | return; | |
3897 | ASSERT(flist->xbf_first != NULL); | |
3898 | for (free = flist->xbf_first; free; free = next) { | |
3899 | next = free->xbfi_next; | |
3900 | xfs_bmap_del_free(flist, NULL, free); | |
3901 | } | |
3902 | ASSERT(flist->xbf_count == 0); | |
3903 | } | |
3904 | ||
3905 | /* | |
3906 | * Returns the file-relative block number of the first unused block(s) | |
3907 | * in the file with at least "len" logically contiguous blocks free. | |
3908 | * This is the lowest-address hole if the file has holes, else the first block | |
3909 | * past the end of file. | |
3910 | * Return 0 if the file is currently local (in-inode). | |
3911 | */ | |
3912 | int /* error */ | |
3913 | xfs_bmap_first_unused( | |
3914 | xfs_trans_t *tp, /* transaction pointer */ | |
3915 | xfs_inode_t *ip, /* incore inode */ | |
3916 | xfs_extlen_t len, /* size of hole to find */ | |
3917 | xfs_fileoff_t *first_unused, /* unused block */ | |
3918 | int whichfork) /* data or attr fork */ | |
3919 | { | |
1da177e4 | 3920 | int error; /* error return value */ |
4eea22f0 | 3921 | int idx; /* extent record index */ |
1da177e4 LT |
3922 | xfs_ifork_t *ifp; /* inode fork pointer */ |
3923 | xfs_fileoff_t lastaddr; /* last block number seen */ | |
3924 | xfs_fileoff_t lowest; /* lowest useful block */ | |
3925 | xfs_fileoff_t max; /* starting useful block */ | |
3926 | xfs_fileoff_t off; /* offset for this block */ | |
3927 | xfs_extnum_t nextents; /* number of extent entries */ | |
3928 | ||
3929 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE || | |
3930 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS || | |
3931 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL); | |
3932 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { | |
3933 | *first_unused = 0; | |
3934 | return 0; | |
3935 | } | |
3936 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
3937 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
3938 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
3939 | return error; | |
3940 | lowest = *first_unused; | |
3941 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
4eea22f0 | 3942 | for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) { |
a6f64d4a | 3943 | xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx); |
1da177e4 LT |
3944 | off = xfs_bmbt_get_startoff(ep); |
3945 | /* | |
3946 | * See if the hole before this extent will work. | |
3947 | */ | |
3948 | if (off >= lowest + len && off - max >= len) { | |
3949 | *first_unused = max; | |
3950 | return 0; | |
3951 | } | |
3952 | lastaddr = off + xfs_bmbt_get_blockcount(ep); | |
3953 | max = XFS_FILEOFF_MAX(lastaddr, lowest); | |
3954 | } | |
3955 | *first_unused = max; | |
3956 | return 0; | |
3957 | } | |
3958 | ||
3959 | /* | |
3960 | * Returns the file-relative block number of the last block + 1 before | |
3961 | * last_block (input value) in the file. | |
4eea22f0 MK |
3962 | * This is not based on i_size, it is based on the extent records. |
3963 | * Returns 0 for local files, as they do not have extent records. | |
1da177e4 LT |
3964 | */ |
3965 | int /* error */ | |
3966 | xfs_bmap_last_before( | |
3967 | xfs_trans_t *tp, /* transaction pointer */ | |
3968 | xfs_inode_t *ip, /* incore inode */ | |
3969 | xfs_fileoff_t *last_block, /* last block */ | |
3970 | int whichfork) /* data or attr fork */ | |
3971 | { | |
3972 | xfs_fileoff_t bno; /* input file offset */ | |
3973 | int eof; /* hit end of file */ | |
a6f64d4a | 3974 | xfs_bmbt_rec_host_t *ep; /* pointer to last extent */ |
1da177e4 LT |
3975 | int error; /* error return value */ |
3976 | xfs_bmbt_irec_t got; /* current extent value */ | |
3977 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
3978 | xfs_extnum_t lastx; /* last extent used */ | |
3979 | xfs_bmbt_irec_t prev; /* previous extent value */ | |
3980 | ||
3981 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && | |
3982 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
3983 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL) | |
3984 | return XFS_ERROR(EIO); | |
3985 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { | |
3986 | *last_block = 0; | |
3987 | return 0; | |
3988 | } | |
3989 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
3990 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
3991 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
3992 | return error; | |
3993 | bno = *last_block - 1; | |
3994 | ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
3995 | &prev); | |
3996 | if (eof || xfs_bmbt_get_startoff(ep) > bno) { | |
3997 | if (prev.br_startoff == NULLFILEOFF) | |
3998 | *last_block = 0; | |
3999 | else | |
4000 | *last_block = prev.br_startoff + prev.br_blockcount; | |
4001 | } | |
4002 | /* | |
4003 | * Otherwise *last_block is already the right answer. | |
4004 | */ | |
4005 | return 0; | |
4006 | } | |
4007 | ||
4008 | /* | |
4009 | * Returns the file-relative block number of the first block past eof in | |
4eea22f0 MK |
4010 | * the file. This is not based on i_size, it is based on the extent records. |
4011 | * Returns 0 for local files, as they do not have extent records. | |
1da177e4 LT |
4012 | */ |
4013 | int /* error */ | |
4014 | xfs_bmap_last_offset( | |
4015 | xfs_trans_t *tp, /* transaction pointer */ | |
4016 | xfs_inode_t *ip, /* incore inode */ | |
4017 | xfs_fileoff_t *last_block, /* last block */ | |
4018 | int whichfork) /* data or attr fork */ | |
4019 | { | |
a6f64d4a | 4020 | xfs_bmbt_rec_host_t *ep; /* pointer to last extent */ |
1da177e4 LT |
4021 | int error; /* error return value */ |
4022 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
4023 | xfs_extnum_t nextents; /* number of extent entries */ | |
4024 | ||
4025 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && | |
4026 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
4027 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL) | |
4028 | return XFS_ERROR(EIO); | |
4029 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { | |
4030 | *last_block = 0; | |
4031 | return 0; | |
4032 | } | |
4033 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4034 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
4035 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
4036 | return error; | |
4037 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
4038 | if (!nextents) { | |
4039 | *last_block = 0; | |
4040 | return 0; | |
4041 | } | |
4eea22f0 | 4042 | ep = xfs_iext_get_ext(ifp, nextents - 1); |
1da177e4 LT |
4043 | *last_block = xfs_bmbt_get_startoff(ep) + xfs_bmbt_get_blockcount(ep); |
4044 | return 0; | |
4045 | } | |
4046 | ||
4047 | /* | |
4048 | * Returns whether the selected fork of the inode has exactly one | |
4049 | * block or not. For the data fork we check this matches di_size, | |
4050 | * implying the file's range is 0..bsize-1. | |
4051 | */ | |
4052 | int /* 1=>1 block, 0=>otherwise */ | |
4053 | xfs_bmap_one_block( | |
4054 | xfs_inode_t *ip, /* incore inode */ | |
4055 | int whichfork) /* data or attr fork */ | |
4056 | { | |
a6f64d4a | 4057 | xfs_bmbt_rec_host_t *ep; /* ptr to fork's extent */ |
1da177e4 LT |
4058 | xfs_ifork_t *ifp; /* inode fork pointer */ |
4059 | int rval; /* return value */ | |
4060 | xfs_bmbt_irec_t s; /* internal version of extent */ | |
4061 | ||
4062 | #ifndef DEBUG | |
ba87ea69 LM |
4063 | if (whichfork == XFS_DATA_FORK) { |
4064 | return ((ip->i_d.di_mode & S_IFMT) == S_IFREG) ? | |
4065 | (ip->i_size == ip->i_mount->m_sb.sb_blocksize) : | |
4066 | (ip->i_d.di_size == ip->i_mount->m_sb.sb_blocksize); | |
4067 | } | |
1da177e4 LT |
4068 | #endif /* !DEBUG */ |
4069 | if (XFS_IFORK_NEXTENTS(ip, whichfork) != 1) | |
4070 | return 0; | |
4071 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) | |
4072 | return 0; | |
4073 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4074 | ASSERT(ifp->if_flags & XFS_IFEXTENTS); | |
4eea22f0 | 4075 | ep = xfs_iext_get_ext(ifp, 0); |
1da177e4 LT |
4076 | xfs_bmbt_get_all(ep, &s); |
4077 | rval = s.br_startoff == 0 && s.br_blockcount == 1; | |
4078 | if (rval && whichfork == XFS_DATA_FORK) | |
ba87ea69 | 4079 | ASSERT(ip->i_size == ip->i_mount->m_sb.sb_blocksize); |
1da177e4 LT |
4080 | return rval; |
4081 | } | |
4082 | ||
4e8938fe CH |
4083 | STATIC int |
4084 | xfs_bmap_sanity_check( | |
4085 | struct xfs_mount *mp, | |
4086 | struct xfs_buf *bp, | |
4087 | int level) | |
4088 | { | |
4089 | struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp); | |
4090 | ||
4091 | if (be32_to_cpu(block->bb_magic) != XFS_BMAP_MAGIC || | |
4092 | be16_to_cpu(block->bb_level) != level || | |
4093 | be16_to_cpu(block->bb_numrecs) == 0 || | |
4094 | be16_to_cpu(block->bb_numrecs) > mp->m_bmap_dmxr[level != 0]) | |
4095 | return 0; | |
4096 | return 1; | |
4097 | } | |
4098 | ||
1da177e4 LT |
4099 | /* |
4100 | * Read in the extents to if_extents. | |
4101 | * All inode fields are set up by caller, we just traverse the btree | |
4102 | * and copy the records in. If the file system cannot contain unwritten | |
4103 | * extents, the records are checked for no "state" flags. | |
4104 | */ | |
4105 | int /* error */ | |
4106 | xfs_bmap_read_extents( | |
4107 | xfs_trans_t *tp, /* transaction pointer */ | |
4108 | xfs_inode_t *ip, /* incore inode */ | |
4109 | int whichfork) /* data or attr fork */ | |
4110 | { | |
7cc95a82 | 4111 | struct xfs_btree_block *block; /* current btree block */ |
1da177e4 LT |
4112 | xfs_fsblock_t bno; /* block # of "block" */ |
4113 | xfs_buf_t *bp; /* buffer for "block" */ | |
4114 | int error; /* error return value */ | |
4115 | xfs_exntfmt_t exntf; /* XFS_EXTFMT_NOSTATE, if checking */ | |
1da177e4 LT |
4116 | xfs_extnum_t i, j; /* index into the extents list */ |
4117 | xfs_ifork_t *ifp; /* fork structure */ | |
4118 | int level; /* btree level, for checking */ | |
4119 | xfs_mount_t *mp; /* file system mount structure */ | |
576039cf | 4120 | __be64 *pp; /* pointer to block address */ |
1da177e4 LT |
4121 | /* REFERENCED */ |
4122 | xfs_extnum_t room; /* number of entries there's room for */ | |
1da177e4 LT |
4123 | |
4124 | bno = NULLFSBLOCK; | |
4125 | mp = ip->i_mount; | |
4126 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4127 | exntf = (whichfork != XFS_DATA_FORK) ? XFS_EXTFMT_NOSTATE : | |
4128 | XFS_EXTFMT_INODE(ip); | |
4129 | block = ifp->if_broot; | |
4130 | /* | |
4131 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. | |
4132 | */ | |
16259e7d CH |
4133 | level = be16_to_cpu(block->bb_level); |
4134 | ASSERT(level > 0); | |
60197e8d | 4135 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); |
576039cf CH |
4136 | bno = be64_to_cpu(*pp); |
4137 | ASSERT(bno != NULLDFSBNO); | |
4138 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); | |
4139 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
1da177e4 LT |
4140 | /* |
4141 | * Go down the tree until leaf level is reached, following the first | |
4142 | * pointer (leftmost) at each level. | |
4143 | */ | |
4144 | while (level-- > 0) { | |
4145 | if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
4146 | XFS_BMAP_BTREE_REF))) | |
4147 | return error; | |
7cc95a82 | 4148 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 4149 | XFS_WANT_CORRUPTED_GOTO( |
4e8938fe | 4150 | xfs_bmap_sanity_check(mp, bp, level), |
1da177e4 LT |
4151 | error0); |
4152 | if (level == 0) | |
4153 | break; | |
136341b4 | 4154 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); |
576039cf CH |
4155 | bno = be64_to_cpu(*pp); |
4156 | XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
1da177e4 LT |
4157 | xfs_trans_brelse(tp, bp); |
4158 | } | |
4159 | /* | |
4160 | * Here with bp and block set to the leftmost leaf node in the tree. | |
4161 | */ | |
4eea22f0 | 4162 | room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
1da177e4 LT |
4163 | i = 0; |
4164 | /* | |
4eea22f0 | 4165 | * Loop over all leaf nodes. Copy information to the extent records. |
1da177e4 LT |
4166 | */ |
4167 | for (;;) { | |
a6f64d4a | 4168 | xfs_bmbt_rec_t *frp; |
1da177e4 LT |
4169 | xfs_fsblock_t nextbno; |
4170 | xfs_extnum_t num_recs; | |
4eea22f0 | 4171 | xfs_extnum_t start; |
1da177e4 LT |
4172 | |
4173 | ||
7cc95a82 | 4174 | num_recs = xfs_btree_get_numrecs(block); |
1da177e4 LT |
4175 | if (unlikely(i + num_recs > room)) { |
4176 | ASSERT(i + num_recs <= room); | |
3762ec6b NS |
4177 | xfs_fs_repair_cmn_err(CE_WARN, ip->i_mount, |
4178 | "corrupt dinode %Lu, (btree extents).", | |
1da177e4 LT |
4179 | (unsigned long long) ip->i_ino); |
4180 | XFS_ERROR_REPORT("xfs_bmap_read_extents(1)", | |
4181 | XFS_ERRLEVEL_LOW, | |
4182 | ip->i_mount); | |
4183 | goto error0; | |
4184 | } | |
4185 | XFS_WANT_CORRUPTED_GOTO( | |
4e8938fe | 4186 | xfs_bmap_sanity_check(mp, bp, 0), |
1da177e4 LT |
4187 | error0); |
4188 | /* | |
4189 | * Read-ahead the next leaf block, if any. | |
4190 | */ | |
7cc95a82 | 4191 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1da177e4 LT |
4192 | if (nextbno != NULLFSBLOCK) |
4193 | xfs_btree_reada_bufl(mp, nextbno, 1); | |
4194 | /* | |
4eea22f0 | 4195 | * Copy records into the extent records. |
1da177e4 | 4196 | */ |
136341b4 | 4197 | frp = XFS_BMBT_REC_ADDR(mp, block, 1); |
4eea22f0 MK |
4198 | start = i; |
4199 | for (j = 0; j < num_recs; j++, i++, frp++) { | |
a6f64d4a | 4200 | xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i); |
cd8b0a97 CH |
4201 | trp->l0 = be64_to_cpu(frp->l0); |
4202 | trp->l1 = be64_to_cpu(frp->l1); | |
1da177e4 LT |
4203 | } |
4204 | if (exntf == XFS_EXTFMT_NOSTATE) { | |
4205 | /* | |
4206 | * Check all attribute bmap btree records and | |
4207 | * any "older" data bmap btree records for a | |
4208 | * set bit in the "extent flag" position. | |
4209 | */ | |
4eea22f0 MK |
4210 | if (unlikely(xfs_check_nostate_extents(ifp, |
4211 | start, num_recs))) { | |
1da177e4 LT |
4212 | XFS_ERROR_REPORT("xfs_bmap_read_extents(2)", |
4213 | XFS_ERRLEVEL_LOW, | |
4214 | ip->i_mount); | |
4215 | goto error0; | |
4216 | } | |
4217 | } | |
1da177e4 LT |
4218 | xfs_trans_brelse(tp, bp); |
4219 | bno = nextbno; | |
4220 | /* | |
4221 | * If we've reached the end, stop. | |
4222 | */ | |
4223 | if (bno == NULLFSBLOCK) | |
4224 | break; | |
4225 | if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
4226 | XFS_BMAP_BTREE_REF))) | |
4227 | return error; | |
7cc95a82 | 4228 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 4229 | } |
4eea22f0 | 4230 | ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); |
1da177e4 | 4231 | ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork)); |
3a59c94c | 4232 | XFS_BMAP_TRACE_EXLIST(ip, i, whichfork); |
1da177e4 LT |
4233 | return 0; |
4234 | error0: | |
4235 | xfs_trans_brelse(tp, bp); | |
4236 | return XFS_ERROR(EFSCORRUPTED); | |
4237 | } | |
4238 | ||
0b1b213f | 4239 | #ifdef DEBUG |
1da177e4 | 4240 | /* |
4eea22f0 | 4241 | * Add bmap trace insert entries for all the contents of the extent records. |
1da177e4 LT |
4242 | */ |
4243 | void | |
4244 | xfs_bmap_trace_exlist( | |
1da177e4 LT |
4245 | xfs_inode_t *ip, /* incore inode pointer */ |
4246 | xfs_extnum_t cnt, /* count of entries in the list */ | |
0b1b213f CH |
4247 | int whichfork, /* data or attr fork */ |
4248 | unsigned long caller_ip) | |
1da177e4 | 4249 | { |
4eea22f0 | 4250 | xfs_extnum_t idx; /* extent record index */ |
1da177e4 | 4251 | xfs_ifork_t *ifp; /* inode fork pointer */ |
0b1b213f CH |
4252 | int state = 0; |
4253 | ||
4254 | if (whichfork == XFS_ATTR_FORK) | |
4255 | state |= BMAP_ATTRFORK; | |
1da177e4 LT |
4256 | |
4257 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4eea22f0 | 4258 | ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))); |
0b1b213f CH |
4259 | for (idx = 0; idx < cnt; idx++) |
4260 | trace_xfs_extlist(ip, idx, whichfork, caller_ip); | |
1da177e4 | 4261 | } |
1da177e4 | 4262 | |
1da177e4 LT |
4263 | /* |
4264 | * Validate that the bmbt_irecs being returned from bmapi are valid | |
4265 | * given the callers original parameters. Specifically check the | |
4266 | * ranges of the returned irecs to ensure that they only extent beyond | |
4267 | * the given parameters if the XFS_BMAPI_ENTIRE flag was set. | |
4268 | */ | |
4269 | STATIC void | |
4270 | xfs_bmap_validate_ret( | |
4271 | xfs_fileoff_t bno, | |
4272 | xfs_filblks_t len, | |
4273 | int flags, | |
4274 | xfs_bmbt_irec_t *mval, | |
4275 | int nmap, | |
4276 | int ret_nmap) | |
4277 | { | |
4278 | int i; /* index to map values */ | |
4279 | ||
4280 | ASSERT(ret_nmap <= nmap); | |
4281 | ||
4282 | for (i = 0; i < ret_nmap; i++) { | |
4283 | ASSERT(mval[i].br_blockcount > 0); | |
4284 | if (!(flags & XFS_BMAPI_ENTIRE)) { | |
4285 | ASSERT(mval[i].br_startoff >= bno); | |
4286 | ASSERT(mval[i].br_blockcount <= len); | |
4287 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount <= | |
4288 | bno + len); | |
4289 | } else { | |
4290 | ASSERT(mval[i].br_startoff < bno + len); | |
4291 | ASSERT(mval[i].br_startoff + mval[i].br_blockcount > | |
4292 | bno); | |
4293 | } | |
4294 | ASSERT(i == 0 || | |
4295 | mval[i - 1].br_startoff + mval[i - 1].br_blockcount == | |
4296 | mval[i].br_startoff); | |
4297 | if ((flags & XFS_BMAPI_WRITE) && !(flags & XFS_BMAPI_DELAY)) | |
4298 | ASSERT(mval[i].br_startblock != DELAYSTARTBLOCK && | |
4299 | mval[i].br_startblock != HOLESTARTBLOCK); | |
4300 | ASSERT(mval[i].br_state == XFS_EXT_NORM || | |
4301 | mval[i].br_state == XFS_EXT_UNWRITTEN); | |
4302 | } | |
4303 | } | |
4304 | #endif /* DEBUG */ | |
4305 | ||
4306 | ||
4307 | /* | |
4308 | * Map file blocks to filesystem blocks. | |
4309 | * File range is given by the bno/len pair. | |
4310 | * Adds blocks to file if a write ("flags & XFS_BMAPI_WRITE" set) | |
4311 | * into a hole or past eof. | |
4312 | * Only allocates blocks from a single allocation group, | |
4313 | * to avoid locking problems. | |
4314 | * The returned value in "firstblock" from the first call in a transaction | |
4315 | * must be remembered and presented to subsequent calls in "firstblock". | |
4316 | * An upper bound for the number of blocks to be allocated is supplied to | |
4317 | * the first call in "total"; if no allocation group has that many free | |
4318 | * blocks then the call will fail (return NULLFSBLOCK in "firstblock"). | |
4319 | */ | |
4320 | int /* error */ | |
4321 | xfs_bmapi( | |
4322 | xfs_trans_t *tp, /* transaction pointer */ | |
4323 | xfs_inode_t *ip, /* incore inode */ | |
4324 | xfs_fileoff_t bno, /* starting file offs. mapped */ | |
4325 | xfs_filblks_t len, /* length to map in file */ | |
4326 | int flags, /* XFS_BMAPI_... */ | |
4327 | xfs_fsblock_t *firstblock, /* first allocated block | |
4328 | controls a.g. for allocs */ | |
4329 | xfs_extlen_t total, /* total blocks needed */ | |
4330 | xfs_bmbt_irec_t *mval, /* output: map values */ | |
4331 | int *nmap, /* i/o: mval size/count */ | |
b4e9181e | 4332 | xfs_bmap_free_t *flist) /* i/o: list extents to free */ |
1da177e4 LT |
4333 | { |
4334 | xfs_fsblock_t abno; /* allocated block number */ | |
4335 | xfs_extlen_t alen; /* allocated extent length */ | |
4336 | xfs_fileoff_t aoff; /* allocated file offset */ | |
f0a0eaa8 | 4337 | xfs_bmalloca_t bma = { 0 }; /* args for xfs_bmap_alloc */ |
1da177e4 | 4338 | xfs_btree_cur_t *cur; /* bmap btree cursor */ |
1da177e4 | 4339 | xfs_fileoff_t end; /* end of mapped file region */ |
4eea22f0 | 4340 | int eof; /* we've hit the end of extents */ |
a6f64d4a | 4341 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ |
1da177e4 | 4342 | int error; /* error return */ |
4eea22f0 | 4343 | xfs_bmbt_irec_t got; /* current file extent record */ |
1da177e4 LT |
4344 | xfs_ifork_t *ifp; /* inode fork pointer */ |
4345 | xfs_extlen_t indlen; /* indirect blocks length */ | |
1da177e4 LT |
4346 | xfs_extnum_t lastx; /* last useful extent number */ |
4347 | int logflags; /* flags for transaction logging */ | |
4348 | xfs_extlen_t minleft; /* min blocks left after allocation */ | |
4349 | xfs_extlen_t minlen; /* min allocation size */ | |
4350 | xfs_mount_t *mp; /* xfs mount structure */ | |
4351 | int n; /* current extent index */ | |
9da096fd | 4352 | int nallocs; /* number of extents alloc'd */ |
1da177e4 LT |
4353 | xfs_extnum_t nextents; /* number of extents in file */ |
4354 | xfs_fileoff_t obno; /* old block number (offset) */ | |
4eea22f0 | 4355 | xfs_bmbt_irec_t prev; /* previous file extent record */ |
1da177e4 | 4356 | int tmp_logflags; /* temp flags holder */ |
06d10dd9 NS |
4357 | int whichfork; /* data or attr fork */ |
4358 | char inhole; /* current location is hole in file */ | |
1da177e4 | 4359 | char wasdelay; /* old extent was delayed */ |
1da177e4 | 4360 | char wr; /* this is a write request */ |
06d10dd9 | 4361 | char rt; /* this is a realtime file */ |
1da177e4 LT |
4362 | #ifdef DEBUG |
4363 | xfs_fileoff_t orig_bno; /* original block number value */ | |
4364 | int orig_flags; /* original flags arg value */ | |
4365 | xfs_filblks_t orig_len; /* original value of len arg */ | |
4366 | xfs_bmbt_irec_t *orig_mval; /* original value of mval */ | |
4367 | int orig_nmap; /* original value of *nmap */ | |
4368 | ||
4369 | orig_bno = bno; | |
4370 | orig_len = len; | |
4371 | orig_flags = flags; | |
4372 | orig_mval = mval; | |
4373 | orig_nmap = *nmap; | |
4374 | #endif | |
4375 | ASSERT(*nmap >= 1); | |
4376 | ASSERT(*nmap <= XFS_BMAP_MAX_NMAP || !(flags & XFS_BMAPI_WRITE)); | |
4377 | whichfork = (flags & XFS_BMAPI_ATTRFORK) ? | |
4378 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
4379 | mp = ip->i_mount; | |
4380 | if (unlikely(XFS_TEST_ERROR( | |
4381 | (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
4382 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && | |
4383 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL), | |
4384 | mp, XFS_ERRTAG_BMAPIFORMAT, XFS_RANDOM_BMAPIFORMAT))) { | |
4385 | XFS_ERROR_REPORT("xfs_bmapi", XFS_ERRLEVEL_LOW, mp); | |
4386 | return XFS_ERROR(EFSCORRUPTED); | |
4387 | } | |
4388 | if (XFS_FORCED_SHUTDOWN(mp)) | |
4389 | return XFS_ERROR(EIO); | |
dd9f438e | 4390 | rt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); |
1da177e4 LT |
4391 | ifp = XFS_IFORK_PTR(ip, whichfork); |
4392 | ASSERT(ifp->if_ext_max == | |
4393 | XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); | |
4394 | if ((wr = (flags & XFS_BMAPI_WRITE)) != 0) | |
4395 | XFS_STATS_INC(xs_blk_mapw); | |
4396 | else | |
4397 | XFS_STATS_INC(xs_blk_mapr); | |
1da177e4 | 4398 | /* |
39269e29 | 4399 | * IGSTATE flag is used to combine extents which |
1da177e4 LT |
4400 | * differ only due to the state of the extents. |
4401 | * This technique is used from xfs_getbmap() | |
4402 | * when the caller does not wish to see the | |
4403 | * separation (which is the default). | |
4404 | * | |
4405 | * This technique is also used when writing a | |
4406 | * buffer which has been partially written, | |
4407 | * (usually by being flushed during a chunkread), | |
4408 | * to ensure one write takes place. This also | |
4409 | * prevents a change in the xfs inode extents at | |
4410 | * this time, intentionally. This change occurs | |
4411 | * on completion of the write operation, in | |
4412 | * xfs_strat_comp(), where the xfs_bmapi() call | |
4413 | * is transactioned, and the extents combined. | |
4414 | */ | |
39269e29 NS |
4415 | if ((flags & XFS_BMAPI_IGSTATE) && wr) /* if writing unwritten space */ |
4416 | wr = 0; /* no allocations are allowed */ | |
4417 | ASSERT(wr || !(flags & XFS_BMAPI_DELAY)); | |
1da177e4 LT |
4418 | logflags = 0; |
4419 | nallocs = 0; | |
4420 | cur = NULL; | |
4421 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) { | |
4422 | ASSERT(wr && tp); | |
4423 | if ((error = xfs_bmap_local_to_extents(tp, ip, | |
4424 | firstblock, total, &logflags, whichfork))) | |
4425 | goto error0; | |
4426 | } | |
4427 | if (wr && *firstblock == NULLFSBLOCK) { | |
4428 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE) | |
16259e7d | 4429 | minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1; |
1da177e4 LT |
4430 | else |
4431 | minleft = 1; | |
4432 | } else | |
4433 | minleft = 0; | |
4434 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
4435 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
4436 | goto error0; | |
4437 | ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
4438 | &prev); | |
4439 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
4440 | n = 0; | |
4441 | end = bno + len; | |
4442 | obno = bno; | |
4443 | bma.ip = NULL; | |
b4e9181e | 4444 | |
1da177e4 LT |
4445 | while (bno < end && n < *nmap) { |
4446 | /* | |
4447 | * Reading past eof, act as though there's a hole | |
4448 | * up to end. | |
4449 | */ | |
4450 | if (eof && !wr) | |
4451 | got.br_startoff = end; | |
4452 | inhole = eof || got.br_startoff > bno; | |
39269e29 | 4453 | wasdelay = wr && !inhole && !(flags & XFS_BMAPI_DELAY) && |
9d87c319 | 4454 | isnullstartblock(got.br_startblock); |
1da177e4 LT |
4455 | /* |
4456 | * First, deal with the hole before the allocated space | |
4457 | * that we found, if any. | |
4458 | */ | |
4459 | if (wr && (inhole || wasdelay)) { | |
4460 | /* | |
4461 | * For the wasdelay case, we could also just | |
4462 | * allocate the stuff asked for in this bmap call | |
4463 | * but that wouldn't be as good. | |
4464 | */ | |
cd8b0bb3 | 4465 | if (wasdelay) { |
1da177e4 LT |
4466 | alen = (xfs_extlen_t)got.br_blockcount; |
4467 | aoff = got.br_startoff; | |
4468 | if (lastx != NULLEXTNUM && lastx) { | |
4eea22f0 | 4469 | ep = xfs_iext_get_ext(ifp, lastx - 1); |
1da177e4 LT |
4470 | xfs_bmbt_get_all(ep, &prev); |
4471 | } | |
1da177e4 LT |
4472 | } else { |
4473 | alen = (xfs_extlen_t) | |
4474 | XFS_FILBLKS_MIN(len, MAXEXTLEN); | |
4475 | if (!eof) | |
4476 | alen = (xfs_extlen_t) | |
4477 | XFS_FILBLKS_MIN(alen, | |
4478 | got.br_startoff - bno); | |
4479 | aoff = bno; | |
4480 | } | |
39269e29 NS |
4481 | minlen = (flags & XFS_BMAPI_CONTIG) ? alen : 1; |
4482 | if (flags & XFS_BMAPI_DELAY) { | |
dd9f438e | 4483 | xfs_extlen_t extsz; |
06d10dd9 NS |
4484 | |
4485 | /* Figure out the extent size, adjust alen */ | |
957d0ebe | 4486 | extsz = xfs_get_extsz_hint(ip); |
dd9f438e NS |
4487 | if (extsz) { |
4488 | error = xfs_bmap_extsize_align(mp, | |
4489 | &got, &prev, extsz, | |
39269e29 NS |
4490 | rt, eof, |
4491 | flags&XFS_BMAPI_DELAY, | |
4492 | flags&XFS_BMAPI_CONVERT, | |
dd9f438e NS |
4493 | &aoff, &alen); |
4494 | ASSERT(!error); | |
06d10dd9 NS |
4495 | } |
4496 | ||
dd9f438e NS |
4497 | if (rt) |
4498 | extsz = alen / mp->m_sb.sb_rextsize; | |
4499 | ||
1da177e4 LT |
4500 | /* |
4501 | * Make a transaction-less quota reservation for | |
4502 | * delayed allocation blocks. This number gets | |
9a2a7de2 NS |
4503 | * adjusted later. We return if we haven't |
4504 | * allocated blocks already inside this loop. | |
1da177e4 | 4505 | */ |
7d095257 CH |
4506 | error = xfs_trans_reserve_quota_nblks( |
4507 | NULL, ip, (long)alen, 0, | |
06d10dd9 | 4508 | rt ? XFS_QMOPT_RES_RTBLKS : |
7d095257 CH |
4509 | XFS_QMOPT_RES_REGBLKS); |
4510 | if (error) { | |
1da177e4 LT |
4511 | if (n == 0) { |
4512 | *nmap = 0; | |
4513 | ASSERT(cur == NULL); | |
9a2a7de2 | 4514 | return error; |
1da177e4 LT |
4515 | } |
4516 | break; | |
4517 | } | |
4518 | ||
4519 | /* | |
4520 | * Split changing sb for alen and indlen since | |
4521 | * they could be coming from different places. | |
4522 | */ | |
06d10dd9 NS |
4523 | indlen = (xfs_extlen_t) |
4524 | xfs_bmap_worst_indlen(ip, alen); | |
4525 | ASSERT(indlen > 0); | |
1da177e4 | 4526 | |
dd9f438e | 4527 | if (rt) { |
06d10dd9 NS |
4528 | error = xfs_mod_incore_sb(mp, |
4529 | XFS_SBS_FREXTENTS, | |
20f4ebf2 | 4530 | -((int64_t)extsz), (flags & |
39269e29 | 4531 | XFS_BMAPI_RSVBLOCKS)); |
dd9f438e | 4532 | } else { |
96540c78 | 4533 | error = xfs_icsb_modify_counters(mp, |
06d10dd9 | 4534 | XFS_SBS_FDBLOCKS, |
20f4ebf2 | 4535 | -((int64_t)alen), (flags & |
39269e29 | 4536 | XFS_BMAPI_RSVBLOCKS)); |
dd9f438e | 4537 | } |
3bdbfb10 | 4538 | if (!error) { |
96540c78 | 4539 | error = xfs_icsb_modify_counters(mp, |
06d10dd9 | 4540 | XFS_SBS_FDBLOCKS, |
20f4ebf2 | 4541 | -((int64_t)indlen), (flags & |
39269e29 | 4542 | XFS_BMAPI_RSVBLOCKS)); |
3ddb8fa9 NS |
4543 | if (error && rt) |
4544 | xfs_mod_incore_sb(mp, | |
3bdbfb10 | 4545 | XFS_SBS_FREXTENTS, |
20f4ebf2 | 4546 | (int64_t)extsz, (flags & |
39269e29 | 4547 | XFS_BMAPI_RSVBLOCKS)); |
3ddb8fa9 | 4548 | else if (error) |
96540c78 | 4549 | xfs_icsb_modify_counters(mp, |
3bdbfb10 | 4550 | XFS_SBS_FDBLOCKS, |
20f4ebf2 | 4551 | (int64_t)alen, (flags & |
39269e29 | 4552 | XFS_BMAPI_RSVBLOCKS)); |
3bdbfb10 | 4553 | } |
06d10dd9 NS |
4554 | |
4555 | if (error) { | |
3ddb8fa9 | 4556 | if (XFS_IS_QUOTA_ON(mp)) |
06d10dd9 | 4557 | /* unreserve the blocks now */ |
dd9f438e | 4558 | (void) |
7d095257 CH |
4559 | xfs_trans_unreserve_quota_nblks( |
4560 | NULL, ip, | |
06d10dd9 NS |
4561 | (long)alen, 0, rt ? |
4562 | XFS_QMOPT_RES_RTBLKS : | |
4563 | XFS_QMOPT_RES_REGBLKS); | |
1da177e4 LT |
4564 | break; |
4565 | } | |
06d10dd9 | 4566 | |
1da177e4 | 4567 | ip->i_delayed_blks += alen; |
9d87c319 | 4568 | abno = nullstartblock(indlen); |
1da177e4 LT |
4569 | } else { |
4570 | /* | |
4571 | * If first time, allocate and fill in | |
4572 | * once-only bma fields. | |
4573 | */ | |
4574 | if (bma.ip == NULL) { | |
4575 | bma.tp = tp; | |
4576 | bma.ip = ip; | |
4577 | bma.prevp = &prev; | |
4578 | bma.gotp = &got; | |
4579 | bma.total = total; | |
4580 | bma.userdata = 0; | |
4581 | } | |
4582 | /* Indicate if this is the first user data | |
4583 | * in the file, or just any user data. | |
4584 | */ | |
39269e29 | 4585 | if (!(flags & XFS_BMAPI_METADATA)) { |
1da177e4 LT |
4586 | bma.userdata = (aoff == 0) ? |
4587 | XFS_ALLOC_INITIAL_USER_DATA : | |
4588 | XFS_ALLOC_USERDATA; | |
4589 | } | |
4590 | /* | |
4591 | * Fill in changeable bma fields. | |
4592 | */ | |
4593 | bma.eof = eof; | |
4594 | bma.firstblock = *firstblock; | |
4595 | bma.alen = alen; | |
4596 | bma.off = aoff; | |
7288026b | 4597 | bma.conv = !!(flags & XFS_BMAPI_CONVERT); |
1da177e4 LT |
4598 | bma.wasdel = wasdelay; |
4599 | bma.minlen = minlen; | |
4600 | bma.low = flist->xbf_low; | |
4601 | bma.minleft = minleft; | |
4602 | /* | |
4603 | * Only want to do the alignment at the | |
4604 | * eof if it is userdata and allocation length | |
4605 | * is larger than a stripe unit. | |
4606 | */ | |
4607 | if (mp->m_dalign && alen >= mp->m_dalign && | |
39269e29 NS |
4608 | (!(flags & XFS_BMAPI_METADATA)) && |
4609 | (whichfork == XFS_DATA_FORK)) { | |
1da177e4 LT |
4610 | if ((error = xfs_bmap_isaeof(ip, aoff, |
4611 | whichfork, &bma.aeof))) | |
4612 | goto error0; | |
4613 | } else | |
4614 | bma.aeof = 0; | |
4615 | /* | |
4616 | * Call allocator. | |
4617 | */ | |
4618 | if ((error = xfs_bmap_alloc(&bma))) | |
4619 | goto error0; | |
4620 | /* | |
4621 | * Copy out result fields. | |
4622 | */ | |
4623 | abno = bma.rval; | |
4624 | if ((flist->xbf_low = bma.low)) | |
4625 | minleft = 0; | |
4626 | alen = bma.alen; | |
4627 | aoff = bma.off; | |
4628 | ASSERT(*firstblock == NULLFSBLOCK || | |
4629 | XFS_FSB_TO_AGNO(mp, *firstblock) == | |
4630 | XFS_FSB_TO_AGNO(mp, bma.firstblock) || | |
4631 | (flist->xbf_low && | |
4632 | XFS_FSB_TO_AGNO(mp, *firstblock) < | |
4633 | XFS_FSB_TO_AGNO(mp, bma.firstblock))); | |
4634 | *firstblock = bma.firstblock; | |
4635 | if (cur) | |
4636 | cur->bc_private.b.firstblock = | |
4637 | *firstblock; | |
4638 | if (abno == NULLFSBLOCK) | |
4639 | break; | |
4640 | if ((ifp->if_flags & XFS_IFBROOT) && !cur) { | |
561f7d17 | 4641 | cur = xfs_bmbt_init_cursor(mp, tp, |
1da177e4 LT |
4642 | ip, whichfork); |
4643 | cur->bc_private.b.firstblock = | |
4644 | *firstblock; | |
4645 | cur->bc_private.b.flist = flist; | |
4646 | } | |
4647 | /* | |
4648 | * Bump the number of extents we've allocated | |
4649 | * in this call. | |
4650 | */ | |
4651 | nallocs++; | |
4652 | } | |
4653 | if (cur) | |
4654 | cur->bc_private.b.flags = | |
4655 | wasdelay ? XFS_BTCUR_BPRV_WASDEL : 0; | |
4656 | got.br_startoff = aoff; | |
4657 | got.br_startblock = abno; | |
4658 | got.br_blockcount = alen; | |
4659 | got.br_state = XFS_EXT_NORM; /* assume normal */ | |
4660 | /* | |
4661 | * Determine state of extent, and the filesystem. | |
4662 | * A wasdelay extent has been initialized, so | |
4663 | * shouldn't be flagged as unwritten. | |
4664 | */ | |
62118709 | 4665 | if (wr && xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 LT |
4666 | if (!wasdelay && (flags & XFS_BMAPI_PREALLOC)) |
4667 | got.br_state = XFS_EXT_UNWRITTEN; | |
4668 | } | |
4669 | error = xfs_bmap_add_extent(ip, lastx, &cur, &got, | |
b4e9181e | 4670 | firstblock, flist, &tmp_logflags, |
3e57ecf6 | 4671 | whichfork, (flags & XFS_BMAPI_RSVBLOCKS)); |
1da177e4 LT |
4672 | logflags |= tmp_logflags; |
4673 | if (error) | |
4674 | goto error0; | |
4675 | lastx = ifp->if_lastex; | |
4eea22f0 | 4676 | ep = xfs_iext_get_ext(ifp, lastx); |
1da177e4 LT |
4677 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
4678 | xfs_bmbt_get_all(ep, &got); | |
4679 | ASSERT(got.br_startoff <= aoff); | |
4680 | ASSERT(got.br_startoff + got.br_blockcount >= | |
4681 | aoff + alen); | |
4682 | #ifdef DEBUG | |
39269e29 | 4683 | if (flags & XFS_BMAPI_DELAY) { |
9d87c319 ES |
4684 | ASSERT(isnullstartblock(got.br_startblock)); |
4685 | ASSERT(startblockval(got.br_startblock) > 0); | |
1da177e4 LT |
4686 | } |
4687 | ASSERT(got.br_state == XFS_EXT_NORM || | |
4688 | got.br_state == XFS_EXT_UNWRITTEN); | |
4689 | #endif | |
4690 | /* | |
4691 | * Fall down into the found allocated space case. | |
4692 | */ | |
4693 | } else if (inhole) { | |
4694 | /* | |
4695 | * Reading in a hole. | |
4696 | */ | |
4697 | mval->br_startoff = bno; | |
4698 | mval->br_startblock = HOLESTARTBLOCK; | |
4699 | mval->br_blockcount = | |
4700 | XFS_FILBLKS_MIN(len, got.br_startoff - bno); | |
4701 | mval->br_state = XFS_EXT_NORM; | |
4702 | bno += mval->br_blockcount; | |
4703 | len -= mval->br_blockcount; | |
4704 | mval++; | |
4705 | n++; | |
4706 | continue; | |
4707 | } | |
4708 | /* | |
4709 | * Then deal with the allocated space we found. | |
4710 | */ | |
4711 | ASSERT(ep != NULL); | |
39269e29 NS |
4712 | if (!(flags & XFS_BMAPI_ENTIRE) && |
4713 | (got.br_startoff + got.br_blockcount > obno)) { | |
1da177e4 LT |
4714 | if (obno > bno) |
4715 | bno = obno; | |
4716 | ASSERT((bno >= obno) || (n == 0)); | |
4717 | ASSERT(bno < end); | |
4718 | mval->br_startoff = bno; | |
9d87c319 | 4719 | if (isnullstartblock(got.br_startblock)) { |
39269e29 | 4720 | ASSERT(!wr || (flags & XFS_BMAPI_DELAY)); |
1da177e4 LT |
4721 | mval->br_startblock = DELAYSTARTBLOCK; |
4722 | } else | |
4723 | mval->br_startblock = | |
4724 | got.br_startblock + | |
4725 | (bno - got.br_startoff); | |
4726 | /* | |
4727 | * Return the minimum of what we got and what we | |
4728 | * asked for for the length. We can use the len | |
4729 | * variable here because it is modified below | |
4730 | * and we could have been there before coming | |
4731 | * here if the first part of the allocation | |
4732 | * didn't overlap what was asked for. | |
4733 | */ | |
4734 | mval->br_blockcount = | |
4735 | XFS_FILBLKS_MIN(end - bno, got.br_blockcount - | |
4736 | (bno - got.br_startoff)); | |
4737 | mval->br_state = got.br_state; | |
4738 | ASSERT(mval->br_blockcount <= len); | |
4739 | } else { | |
4740 | *mval = got; | |
9d87c319 | 4741 | if (isnullstartblock(mval->br_startblock)) { |
39269e29 | 4742 | ASSERT(!wr || (flags & XFS_BMAPI_DELAY)); |
1da177e4 LT |
4743 | mval->br_startblock = DELAYSTARTBLOCK; |
4744 | } | |
4745 | } | |
4746 | ||
4747 | /* | |
4748 | * Check if writing previously allocated but | |
4749 | * unwritten extents. | |
4750 | */ | |
44722352 DC |
4751 | if (wr && |
4752 | ((mval->br_state == XFS_EXT_UNWRITTEN && | |
4753 | ((flags & (XFS_BMAPI_PREALLOC|XFS_BMAPI_DELAY)) == 0)) || | |
4754 | (mval->br_state == XFS_EXT_NORM && | |
4755 | ((flags & (XFS_BMAPI_PREALLOC|XFS_BMAPI_CONVERT)) == | |
4756 | (XFS_BMAPI_PREALLOC|XFS_BMAPI_CONVERT))))) { | |
1da177e4 LT |
4757 | /* |
4758 | * Modify (by adding) the state flag, if writing. | |
4759 | */ | |
4760 | ASSERT(mval->br_blockcount <= len); | |
4761 | if ((ifp->if_flags & XFS_IFBROOT) && !cur) { | |
561f7d17 CH |
4762 | cur = xfs_bmbt_init_cursor(mp, |
4763 | tp, ip, whichfork); | |
1da177e4 LT |
4764 | cur->bc_private.b.firstblock = |
4765 | *firstblock; | |
4766 | cur->bc_private.b.flist = flist; | |
4767 | } | |
44722352 DC |
4768 | mval->br_state = (mval->br_state == XFS_EXT_UNWRITTEN) |
4769 | ? XFS_EXT_NORM | |
4770 | : XFS_EXT_UNWRITTEN; | |
1da177e4 | 4771 | error = xfs_bmap_add_extent(ip, lastx, &cur, mval, |
b4e9181e | 4772 | firstblock, flist, &tmp_logflags, |
3e57ecf6 | 4773 | whichfork, (flags & XFS_BMAPI_RSVBLOCKS)); |
1da177e4 LT |
4774 | logflags |= tmp_logflags; |
4775 | if (error) | |
4776 | goto error0; | |
4777 | lastx = ifp->if_lastex; | |
4eea22f0 | 4778 | ep = xfs_iext_get_ext(ifp, lastx); |
1da177e4 LT |
4779 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); |
4780 | xfs_bmbt_get_all(ep, &got); | |
4781 | /* | |
4782 | * We may have combined previously unwritten | |
4783 | * space with written space, so generate | |
4784 | * another request. | |
4785 | */ | |
4786 | if (mval->br_blockcount < len) | |
4787 | continue; | |
4788 | } | |
4789 | ||
39269e29 | 4790 | ASSERT((flags & XFS_BMAPI_ENTIRE) || |
1da177e4 | 4791 | ((mval->br_startoff + mval->br_blockcount) <= end)); |
39269e29 NS |
4792 | ASSERT((flags & XFS_BMAPI_ENTIRE) || |
4793 | (mval->br_blockcount <= len) || | |
1da177e4 LT |
4794 | (mval->br_startoff < obno)); |
4795 | bno = mval->br_startoff + mval->br_blockcount; | |
4796 | len = end - bno; | |
4797 | if (n > 0 && mval->br_startoff == mval[-1].br_startoff) { | |
4798 | ASSERT(mval->br_startblock == mval[-1].br_startblock); | |
4799 | ASSERT(mval->br_blockcount > mval[-1].br_blockcount); | |
4800 | ASSERT(mval->br_state == mval[-1].br_state); | |
4801 | mval[-1].br_blockcount = mval->br_blockcount; | |
4802 | mval[-1].br_state = mval->br_state; | |
4803 | } else if (n > 0 && mval->br_startblock != DELAYSTARTBLOCK && | |
4804 | mval[-1].br_startblock != DELAYSTARTBLOCK && | |
4805 | mval[-1].br_startblock != HOLESTARTBLOCK && | |
4806 | mval->br_startblock == | |
4807 | mval[-1].br_startblock + mval[-1].br_blockcount && | |
39269e29 NS |
4808 | ((flags & XFS_BMAPI_IGSTATE) || |
4809 | mval[-1].br_state == mval->br_state)) { | |
1da177e4 LT |
4810 | ASSERT(mval->br_startoff == |
4811 | mval[-1].br_startoff + mval[-1].br_blockcount); | |
4812 | mval[-1].br_blockcount += mval->br_blockcount; | |
4813 | } else if (n > 0 && | |
4814 | mval->br_startblock == DELAYSTARTBLOCK && | |
4815 | mval[-1].br_startblock == DELAYSTARTBLOCK && | |
4816 | mval->br_startoff == | |
4817 | mval[-1].br_startoff + mval[-1].br_blockcount) { | |
4818 | mval[-1].br_blockcount += mval->br_blockcount; | |
4819 | mval[-1].br_state = mval->br_state; | |
4820 | } else if (!((n == 0) && | |
4821 | ((mval->br_startoff + mval->br_blockcount) <= | |
4822 | obno))) { | |
4823 | mval++; | |
4824 | n++; | |
4825 | } | |
4826 | /* | |
4827 | * If we're done, stop now. Stop when we've allocated | |
4828 | * XFS_BMAP_MAX_NMAP extents no matter what. Otherwise | |
4829 | * the transaction may get too big. | |
4830 | */ | |
4831 | if (bno >= end || n >= *nmap || nallocs >= *nmap) | |
4832 | break; | |
4833 | /* | |
4834 | * Else go on to the next record. | |
4835 | */ | |
4eea22f0 | 4836 | ep = xfs_iext_get_ext(ifp, ++lastx); |
4e5ae838 DC |
4837 | prev = got; |
4838 | if (lastx >= nextents) | |
1da177e4 | 4839 | eof = 1; |
4e5ae838 | 4840 | else |
1da177e4 LT |
4841 | xfs_bmbt_get_all(ep, &got); |
4842 | } | |
4843 | ifp->if_lastex = lastx; | |
4844 | *nmap = n; | |
4845 | /* | |
4846 | * Transform from btree to extents, give it cur. | |
4847 | */ | |
4848 | if (tp && XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && | |
4849 | XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) { | |
4850 | ASSERT(wr && cur); | |
4851 | error = xfs_bmap_btree_to_extents(tp, ip, cur, | |
4852 | &tmp_logflags, whichfork); | |
4853 | logflags |= tmp_logflags; | |
4854 | if (error) | |
4855 | goto error0; | |
4856 | } | |
4857 | ASSERT(ifp->if_ext_max == | |
4858 | XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); | |
4859 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE || | |
4860 | XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max); | |
4861 | error = 0; | |
1da177e4 LT |
4862 | error0: |
4863 | /* | |
4864 | * Log everything. Do this after conversion, there's no point in | |
4eea22f0 | 4865 | * logging the extent records if we've converted to btree format. |
1da177e4 | 4866 | */ |
9d87c319 | 4867 | if ((logflags & xfs_ilog_fext(whichfork)) && |
1da177e4 | 4868 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) |
9d87c319 ES |
4869 | logflags &= ~xfs_ilog_fext(whichfork); |
4870 | else if ((logflags & xfs_ilog_fbroot(whichfork)) && | |
1da177e4 | 4871 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) |
9d87c319 | 4872 | logflags &= ~xfs_ilog_fbroot(whichfork); |
1da177e4 LT |
4873 | /* |
4874 | * Log whatever the flags say, even if error. Otherwise we might miss | |
4875 | * detecting a case where the data is changed, there's an error, | |
4876 | * and it's not logged so we don't shutdown when we should. | |
4877 | */ | |
4878 | if (logflags) { | |
4879 | ASSERT(tp && wr); | |
4880 | xfs_trans_log_inode(tp, ip, logflags); | |
4881 | } | |
4882 | if (cur) { | |
4883 | if (!error) { | |
4884 | ASSERT(*firstblock == NULLFSBLOCK || | |
4885 | XFS_FSB_TO_AGNO(mp, *firstblock) == | |
4886 | XFS_FSB_TO_AGNO(mp, | |
4887 | cur->bc_private.b.firstblock) || | |
4888 | (flist->xbf_low && | |
4889 | XFS_FSB_TO_AGNO(mp, *firstblock) < | |
4890 | XFS_FSB_TO_AGNO(mp, | |
4891 | cur->bc_private.b.firstblock))); | |
4892 | *firstblock = cur->bc_private.b.firstblock; | |
4893 | } | |
4894 | xfs_btree_del_cursor(cur, | |
4895 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
4896 | } | |
4897 | if (!error) | |
4898 | xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval, | |
4899 | orig_nmap, *nmap); | |
4900 | return error; | |
4901 | } | |
4902 | ||
4903 | /* | |
4904 | * Map file blocks to filesystem blocks, simple version. | |
4905 | * One block (extent) only, read-only. | |
4906 | * For flags, only the XFS_BMAPI_ATTRFORK flag is examined. | |
4907 | * For the other flag values, the effect is as if XFS_BMAPI_METADATA | |
4908 | * was set and all the others were clear. | |
4909 | */ | |
4910 | int /* error */ | |
4911 | xfs_bmapi_single( | |
4912 | xfs_trans_t *tp, /* transaction pointer */ | |
4913 | xfs_inode_t *ip, /* incore inode */ | |
4914 | int whichfork, /* data or attr fork */ | |
4915 | xfs_fsblock_t *fsb, /* output: mapped block */ | |
4916 | xfs_fileoff_t bno) /* starting file offs. mapped */ | |
4917 | { | |
4eea22f0 | 4918 | int eof; /* we've hit the end of extents */ |
1da177e4 | 4919 | int error; /* error return */ |
4eea22f0 | 4920 | xfs_bmbt_irec_t got; /* current file extent record */ |
1da177e4 LT |
4921 | xfs_ifork_t *ifp; /* inode fork pointer */ |
4922 | xfs_extnum_t lastx; /* last useful extent number */ | |
4eea22f0 | 4923 | xfs_bmbt_irec_t prev; /* previous file extent record */ |
1da177e4 LT |
4924 | |
4925 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
4926 | if (unlikely( | |
4927 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE && | |
4928 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)) { | |
4929 | XFS_ERROR_REPORT("xfs_bmapi_single", XFS_ERRLEVEL_LOW, | |
4930 | ip->i_mount); | |
4931 | return XFS_ERROR(EFSCORRUPTED); | |
4932 | } | |
4933 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) | |
4934 | return XFS_ERROR(EIO); | |
4935 | XFS_STATS_INC(xs_blk_mapr); | |
4936 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
4937 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
4938 | return error; | |
4939 | (void)xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
4940 | &prev); | |
4941 | /* | |
4942 | * Reading past eof, act as though there's a hole | |
4943 | * up to end. | |
4944 | */ | |
4945 | if (eof || got.br_startoff > bno) { | |
4946 | *fsb = NULLFSBLOCK; | |
4947 | return 0; | |
4948 | } | |
9d87c319 | 4949 | ASSERT(!isnullstartblock(got.br_startblock)); |
1da177e4 LT |
4950 | ASSERT(bno < got.br_startoff + got.br_blockcount); |
4951 | *fsb = got.br_startblock + (bno - got.br_startoff); | |
4952 | ifp->if_lastex = lastx; | |
4953 | return 0; | |
4954 | } | |
4955 | ||
4956 | /* | |
4957 | * Unmap (remove) blocks from a file. | |
4958 | * If nexts is nonzero then the number of extents to remove is limited to | |
4959 | * that value. If not all extents in the block range can be removed then | |
4960 | * *done is set. | |
4961 | */ | |
4962 | int /* error */ | |
4963 | xfs_bunmapi( | |
4964 | xfs_trans_t *tp, /* transaction pointer */ | |
4965 | struct xfs_inode *ip, /* incore inode */ | |
4966 | xfs_fileoff_t bno, /* starting offset to unmap */ | |
4967 | xfs_filblks_t len, /* length to unmap in file */ | |
4968 | int flags, /* misc flags */ | |
4969 | xfs_extnum_t nexts, /* number of extents max */ | |
4970 | xfs_fsblock_t *firstblock, /* first allocated block | |
4971 | controls a.g. for allocs */ | |
4972 | xfs_bmap_free_t *flist, /* i/o: list extents to free */ | |
4973 | int *done) /* set if not done yet */ | |
4974 | { | |
4975 | xfs_btree_cur_t *cur; /* bmap btree cursor */ | |
4976 | xfs_bmbt_irec_t del; /* extent being deleted */ | |
4977 | int eof; /* is deleting at eof */ | |
a6f64d4a | 4978 | xfs_bmbt_rec_host_t *ep; /* extent record pointer */ |
1da177e4 LT |
4979 | int error; /* error return value */ |
4980 | xfs_extnum_t extno; /* extent number in list */ | |
4eea22f0 | 4981 | xfs_bmbt_irec_t got; /* current extent record */ |
1da177e4 LT |
4982 | xfs_ifork_t *ifp; /* inode fork pointer */ |
4983 | int isrt; /* freeing in rt area */ | |
4984 | xfs_extnum_t lastx; /* last extent index used */ | |
4985 | int logflags; /* transaction logging flags */ | |
4986 | xfs_extlen_t mod; /* rt extent offset */ | |
4987 | xfs_mount_t *mp; /* mount structure */ | |
4eea22f0 MK |
4988 | xfs_extnum_t nextents; /* number of file extents */ |
4989 | xfs_bmbt_irec_t prev; /* previous extent record */ | |
1da177e4 LT |
4990 | xfs_fileoff_t start; /* first file offset deleted */ |
4991 | int tmp_logflags; /* partial logging flags */ | |
4992 | int wasdel; /* was a delayed alloc extent */ | |
4993 | int whichfork; /* data or attribute fork */ | |
4994 | int rsvd; /* OK to allocate reserved blocks */ | |
4995 | xfs_fsblock_t sum; | |
4996 | ||
0b1b213f CH |
4997 | trace_xfs_bunmap(ip, bno, len, flags, _RET_IP_); |
4998 | ||
1da177e4 LT |
4999 | whichfork = (flags & XFS_BMAPI_ATTRFORK) ? |
5000 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
5001 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5002 | if (unlikely( | |
5003 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS && | |
5004 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) { | |
5005 | XFS_ERROR_REPORT("xfs_bunmapi", XFS_ERRLEVEL_LOW, | |
5006 | ip->i_mount); | |
5007 | return XFS_ERROR(EFSCORRUPTED); | |
5008 | } | |
5009 | mp = ip->i_mount; | |
5010 | if (XFS_FORCED_SHUTDOWN(mp)) | |
5011 | return XFS_ERROR(EIO); | |
5012 | rsvd = (flags & XFS_BMAPI_RSVBLOCKS) != 0; | |
5013 | ASSERT(len > 0); | |
5014 | ASSERT(nexts >= 0); | |
5015 | ASSERT(ifp->if_ext_max == | |
5016 | XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); | |
5017 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
5018 | (error = xfs_iread_extents(tp, ip, whichfork))) | |
5019 | return error; | |
5020 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
5021 | if (nextents == 0) { | |
5022 | *done = 1; | |
5023 | return 0; | |
5024 | } | |
5025 | XFS_STATS_INC(xs_blk_unmap); | |
dd9f438e | 5026 | isrt = (whichfork == XFS_DATA_FORK) && XFS_IS_REALTIME_INODE(ip); |
1da177e4 LT |
5027 | start = bno; |
5028 | bno = start + len - 1; | |
5029 | ep = xfs_bmap_search_extents(ip, bno, whichfork, &eof, &lastx, &got, | |
5030 | &prev); | |
b4e9181e | 5031 | |
1da177e4 LT |
5032 | /* |
5033 | * Check to see if the given block number is past the end of the | |
5034 | * file, back up to the last block if so... | |
5035 | */ | |
5036 | if (eof) { | |
4eea22f0 | 5037 | ep = xfs_iext_get_ext(ifp, --lastx); |
1da177e4 LT |
5038 | xfs_bmbt_get_all(ep, &got); |
5039 | bno = got.br_startoff + got.br_blockcount - 1; | |
5040 | } | |
5041 | logflags = 0; | |
5042 | if (ifp->if_flags & XFS_IFBROOT) { | |
5043 | ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE); | |
561f7d17 | 5044 | cur = xfs_bmbt_init_cursor(mp, tp, ip, whichfork); |
1da177e4 LT |
5045 | cur->bc_private.b.firstblock = *firstblock; |
5046 | cur->bc_private.b.flist = flist; | |
5047 | cur->bc_private.b.flags = 0; | |
5048 | } else | |
5049 | cur = NULL; | |
5050 | extno = 0; | |
5051 | while (bno != (xfs_fileoff_t)-1 && bno >= start && lastx >= 0 && | |
5052 | (nexts == 0 || extno < nexts)) { | |
5053 | /* | |
5054 | * Is the found extent after a hole in which bno lives? | |
5055 | * Just back up to the previous extent, if so. | |
5056 | */ | |
5057 | if (got.br_startoff > bno) { | |
5058 | if (--lastx < 0) | |
5059 | break; | |
4eea22f0 | 5060 | ep = xfs_iext_get_ext(ifp, lastx); |
1da177e4 LT |
5061 | xfs_bmbt_get_all(ep, &got); |
5062 | } | |
5063 | /* | |
5064 | * Is the last block of this extent before the range | |
5065 | * we're supposed to delete? If so, we're done. | |
5066 | */ | |
5067 | bno = XFS_FILEOFF_MIN(bno, | |
5068 | got.br_startoff + got.br_blockcount - 1); | |
5069 | if (bno < start) | |
5070 | break; | |
5071 | /* | |
5072 | * Then deal with the (possibly delayed) allocated space | |
5073 | * we found. | |
5074 | */ | |
5075 | ASSERT(ep != NULL); | |
5076 | del = got; | |
9d87c319 | 5077 | wasdel = isnullstartblock(del.br_startblock); |
1da177e4 LT |
5078 | if (got.br_startoff < start) { |
5079 | del.br_startoff = start; | |
5080 | del.br_blockcount -= start - got.br_startoff; | |
5081 | if (!wasdel) | |
5082 | del.br_startblock += start - got.br_startoff; | |
5083 | } | |
5084 | if (del.br_startoff + del.br_blockcount > bno + 1) | |
5085 | del.br_blockcount = bno + 1 - del.br_startoff; | |
5086 | sum = del.br_startblock + del.br_blockcount; | |
5087 | if (isrt && | |
5088 | (mod = do_mod(sum, mp->m_sb.sb_rextsize))) { | |
5089 | /* | |
5090 | * Realtime extent not lined up at the end. | |
5091 | * The extent could have been split into written | |
5092 | * and unwritten pieces, or we could just be | |
5093 | * unmapping part of it. But we can't really | |
5094 | * get rid of part of a realtime extent. | |
5095 | */ | |
5096 | if (del.br_state == XFS_EXT_UNWRITTEN || | |
62118709 | 5097 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 LT |
5098 | /* |
5099 | * This piece is unwritten, or we're not | |
5100 | * using unwritten extents. Skip over it. | |
5101 | */ | |
5102 | ASSERT(bno >= mod); | |
5103 | bno -= mod > del.br_blockcount ? | |
5104 | del.br_blockcount : mod; | |
5105 | if (bno < got.br_startoff) { | |
5106 | if (--lastx >= 0) | |
4eea22f0 MK |
5107 | xfs_bmbt_get_all(xfs_iext_get_ext( |
5108 | ifp, lastx), &got); | |
1da177e4 LT |
5109 | } |
5110 | continue; | |
5111 | } | |
5112 | /* | |
5113 | * It's written, turn it unwritten. | |
5114 | * This is better than zeroing it. | |
5115 | */ | |
5116 | ASSERT(del.br_state == XFS_EXT_NORM); | |
5117 | ASSERT(xfs_trans_get_block_res(tp) > 0); | |
5118 | /* | |
5119 | * If this spans a realtime extent boundary, | |
5120 | * chop it back to the start of the one we end at. | |
5121 | */ | |
5122 | if (del.br_blockcount > mod) { | |
5123 | del.br_startoff += del.br_blockcount - mod; | |
5124 | del.br_startblock += del.br_blockcount - mod; | |
5125 | del.br_blockcount = mod; | |
5126 | } | |
5127 | del.br_state = XFS_EXT_UNWRITTEN; | |
5128 | error = xfs_bmap_add_extent(ip, lastx, &cur, &del, | |
b4e9181e | 5129 | firstblock, flist, &logflags, |
3e57ecf6 | 5130 | XFS_DATA_FORK, 0); |
1da177e4 LT |
5131 | if (error) |
5132 | goto error0; | |
5133 | goto nodelete; | |
5134 | } | |
5135 | if (isrt && (mod = do_mod(del.br_startblock, mp->m_sb.sb_rextsize))) { | |
5136 | /* | |
5137 | * Realtime extent is lined up at the end but not | |
5138 | * at the front. We'll get rid of full extents if | |
5139 | * we can. | |
5140 | */ | |
5141 | mod = mp->m_sb.sb_rextsize - mod; | |
5142 | if (del.br_blockcount > mod) { | |
5143 | del.br_blockcount -= mod; | |
5144 | del.br_startoff += mod; | |
5145 | del.br_startblock += mod; | |
5146 | } else if ((del.br_startoff == start && | |
5147 | (del.br_state == XFS_EXT_UNWRITTEN || | |
5148 | xfs_trans_get_block_res(tp) == 0)) || | |
62118709 | 5149 | !xfs_sb_version_hasextflgbit(&mp->m_sb)) { |
1da177e4 LT |
5150 | /* |
5151 | * Can't make it unwritten. There isn't | |
5152 | * a full extent here so just skip it. | |
5153 | */ | |
5154 | ASSERT(bno >= del.br_blockcount); | |
5155 | bno -= del.br_blockcount; | |
5156 | if (bno < got.br_startoff) { | |
5157 | if (--lastx >= 0) | |
5158 | xfs_bmbt_get_all(--ep, &got); | |
5159 | } | |
5160 | continue; | |
5161 | } else if (del.br_state == XFS_EXT_UNWRITTEN) { | |
5162 | /* | |
5163 | * This one is already unwritten. | |
5164 | * It must have a written left neighbor. | |
5165 | * Unwrite the killed part of that one and | |
5166 | * try again. | |
5167 | */ | |
5168 | ASSERT(lastx > 0); | |
4eea22f0 MK |
5169 | xfs_bmbt_get_all(xfs_iext_get_ext(ifp, |
5170 | lastx - 1), &prev); | |
1da177e4 | 5171 | ASSERT(prev.br_state == XFS_EXT_NORM); |
9d87c319 | 5172 | ASSERT(!isnullstartblock(prev.br_startblock)); |
1da177e4 LT |
5173 | ASSERT(del.br_startblock == |
5174 | prev.br_startblock + prev.br_blockcount); | |
5175 | if (prev.br_startoff < start) { | |
5176 | mod = start - prev.br_startoff; | |
5177 | prev.br_blockcount -= mod; | |
5178 | prev.br_startblock += mod; | |
5179 | prev.br_startoff = start; | |
5180 | } | |
5181 | prev.br_state = XFS_EXT_UNWRITTEN; | |
5182 | error = xfs_bmap_add_extent(ip, lastx - 1, &cur, | |
5183 | &prev, firstblock, flist, &logflags, | |
b4e9181e | 5184 | XFS_DATA_FORK, 0); |
1da177e4 LT |
5185 | if (error) |
5186 | goto error0; | |
5187 | goto nodelete; | |
5188 | } else { | |
5189 | ASSERT(del.br_state == XFS_EXT_NORM); | |
5190 | del.br_state = XFS_EXT_UNWRITTEN; | |
5191 | error = xfs_bmap_add_extent(ip, lastx, &cur, | |
5192 | &del, firstblock, flist, &logflags, | |
b4e9181e | 5193 | XFS_DATA_FORK, 0); |
1da177e4 LT |
5194 | if (error) |
5195 | goto error0; | |
5196 | goto nodelete; | |
5197 | } | |
5198 | } | |
5199 | if (wasdel) { | |
9d87c319 | 5200 | ASSERT(startblockval(del.br_startblock) > 0); |
dd9f438e | 5201 | /* Update realtime/data freespace, unreserve quota */ |
06d10dd9 NS |
5202 | if (isrt) { |
5203 | xfs_filblks_t rtexts; | |
5204 | ||
5205 | rtexts = XFS_FSB_TO_B(mp, del.br_blockcount); | |
5206 | do_div(rtexts, mp->m_sb.sb_rextsize); | |
5207 | xfs_mod_incore_sb(mp, XFS_SBS_FREXTENTS, | |
20f4ebf2 | 5208 | (int64_t)rtexts, rsvd); |
7d095257 CH |
5209 | (void)xfs_trans_reserve_quota_nblks(NULL, |
5210 | ip, -((long)del.br_blockcount), 0, | |
06d10dd9 NS |
5211 | XFS_QMOPT_RES_RTBLKS); |
5212 | } else { | |
96540c78 | 5213 | xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, |
20f4ebf2 | 5214 | (int64_t)del.br_blockcount, rsvd); |
7d095257 CH |
5215 | (void)xfs_trans_reserve_quota_nblks(NULL, |
5216 | ip, -((long)del.br_blockcount), 0, | |
1da177e4 | 5217 | XFS_QMOPT_RES_REGBLKS); |
06d10dd9 | 5218 | } |
1da177e4 LT |
5219 | ip->i_delayed_blks -= del.br_blockcount; |
5220 | if (cur) | |
5221 | cur->bc_private.b.flags |= | |
5222 | XFS_BTCUR_BPRV_WASDEL; | |
5223 | } else if (cur) | |
5224 | cur->bc_private.b.flags &= ~XFS_BTCUR_BPRV_WASDEL; | |
5225 | /* | |
5226 | * If it's the case where the directory code is running | |
5227 | * with no block reservation, and the deleted block is in | |
5228 | * the middle of its extent, and the resulting insert | |
5229 | * of an extent would cause transformation to btree format, | |
5230 | * then reject it. The calling code will then swap | |
5231 | * blocks around instead. | |
5232 | * We have to do this now, rather than waiting for the | |
5233 | * conversion to btree format, since the transaction | |
5234 | * will be dirty. | |
5235 | */ | |
5236 | if (!wasdel && xfs_trans_get_block_res(tp) == 0 && | |
5237 | XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && | |
5238 | XFS_IFORK_NEXTENTS(ip, whichfork) >= ifp->if_ext_max && | |
5239 | del.br_startoff > got.br_startoff && | |
5240 | del.br_startoff + del.br_blockcount < | |
5241 | got.br_startoff + got.br_blockcount) { | |
5242 | error = XFS_ERROR(ENOSPC); | |
5243 | goto error0; | |
5244 | } | |
5245 | error = xfs_bmap_del_extent(ip, tp, lastx, flist, cur, &del, | |
b4e9181e | 5246 | &tmp_logflags, whichfork, rsvd); |
1da177e4 LT |
5247 | logflags |= tmp_logflags; |
5248 | if (error) | |
5249 | goto error0; | |
5250 | bno = del.br_startoff - 1; | |
5251 | nodelete: | |
5252 | lastx = ifp->if_lastex; | |
5253 | /* | |
5254 | * If not done go on to the next (previous) record. | |
5255 | * Reset ep in case the extents array was re-alloced. | |
5256 | */ | |
4eea22f0 | 5257 | ep = xfs_iext_get_ext(ifp, lastx); |
1da177e4 LT |
5258 | if (bno != (xfs_fileoff_t)-1 && bno >= start) { |
5259 | if (lastx >= XFS_IFORK_NEXTENTS(ip, whichfork) || | |
5260 | xfs_bmbt_get_startoff(ep) > bno) { | |
4eea22f0 MK |
5261 | if (--lastx >= 0) |
5262 | ep = xfs_iext_get_ext(ifp, lastx); | |
1da177e4 LT |
5263 | } |
5264 | if (lastx >= 0) | |
5265 | xfs_bmbt_get_all(ep, &got); | |
5266 | extno++; | |
5267 | } | |
5268 | } | |
5269 | ifp->if_lastex = lastx; | |
5270 | *done = bno == (xfs_fileoff_t)-1 || bno < start || lastx < 0; | |
5271 | ASSERT(ifp->if_ext_max == | |
5272 | XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); | |
5273 | /* | |
5274 | * Convert to a btree if necessary. | |
5275 | */ | |
5276 | if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS && | |
5277 | XFS_IFORK_NEXTENTS(ip, whichfork) > ifp->if_ext_max) { | |
5278 | ASSERT(cur == NULL); | |
5279 | error = xfs_bmap_extents_to_btree(tp, ip, firstblock, flist, | |
5280 | &cur, 0, &tmp_logflags, whichfork); | |
5281 | logflags |= tmp_logflags; | |
5282 | if (error) | |
5283 | goto error0; | |
5284 | } | |
5285 | /* | |
5286 | * transform from btree to extents, give it cur | |
5287 | */ | |
5288 | else if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE && | |
5289 | XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max) { | |
5290 | ASSERT(cur != NULL); | |
5291 | error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags, | |
5292 | whichfork); | |
5293 | logflags |= tmp_logflags; | |
5294 | if (error) | |
5295 | goto error0; | |
5296 | } | |
5297 | /* | |
5298 | * transform from extents to local? | |
5299 | */ | |
5300 | ASSERT(ifp->if_ext_max == | |
5301 | XFS_IFORK_SIZE(ip, whichfork) / (uint)sizeof(xfs_bmbt_rec_t)); | |
5302 | error = 0; | |
5303 | error0: | |
5304 | /* | |
5305 | * Log everything. Do this after conversion, there's no point in | |
4eea22f0 | 5306 | * logging the extent records if we've converted to btree format. |
1da177e4 | 5307 | */ |
9d87c319 | 5308 | if ((logflags & xfs_ilog_fext(whichfork)) && |
1da177e4 | 5309 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS) |
9d87c319 ES |
5310 | logflags &= ~xfs_ilog_fext(whichfork); |
5311 | else if ((logflags & xfs_ilog_fbroot(whichfork)) && | |
1da177e4 | 5312 | XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) |
9d87c319 | 5313 | logflags &= ~xfs_ilog_fbroot(whichfork); |
1da177e4 LT |
5314 | /* |
5315 | * Log inode even in the error case, if the transaction | |
5316 | * is dirty we'll need to shut down the filesystem. | |
5317 | */ | |
5318 | if (logflags) | |
5319 | xfs_trans_log_inode(tp, ip, logflags); | |
5320 | if (cur) { | |
5321 | if (!error) { | |
5322 | *firstblock = cur->bc_private.b.firstblock; | |
5323 | cur->bc_private.b.allocated = 0; | |
5324 | } | |
5325 | xfs_btree_del_cursor(cur, | |
5326 | error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); | |
5327 | } | |
5328 | return error; | |
5329 | } | |
5330 | ||
3bacbcd8 VA |
5331 | /* |
5332 | * returns 1 for success, 0 if we failed to map the extent. | |
5333 | */ | |
5334 | STATIC int | |
5335 | xfs_getbmapx_fix_eof_hole( | |
5336 | xfs_inode_t *ip, /* xfs incore inode pointer */ | |
8a7141a8 | 5337 | struct getbmapx *out, /* output structure */ |
3bacbcd8 | 5338 | int prealloced, /* this is a file with |
8a7141a8 | 5339 | * preallocated data space */ |
3bacbcd8 VA |
5340 | __int64_t end, /* last block requested */ |
5341 | xfs_fsblock_t startblock) | |
5342 | { | |
5343 | __int64_t fixlen; | |
5344 | xfs_mount_t *mp; /* file system mount point */ | |
5af317c9 ES |
5345 | xfs_ifork_t *ifp; /* inode fork pointer */ |
5346 | xfs_extnum_t lastx; /* last extent pointer */ | |
5347 | xfs_fileoff_t fileblock; | |
3bacbcd8 VA |
5348 | |
5349 | if (startblock == HOLESTARTBLOCK) { | |
5350 | mp = ip->i_mount; | |
5351 | out->bmv_block = -1; | |
5352 | fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, ip->i_size)); | |
5353 | fixlen -= out->bmv_offset; | |
5354 | if (prealloced && out->bmv_offset + out->bmv_length == end) { | |
5355 | /* Came to hole at EOF. Trim it. */ | |
5356 | if (fixlen <= 0) | |
5357 | return 0; | |
5358 | out->bmv_length = fixlen; | |
5359 | } | |
5360 | } else { | |
5af317c9 ES |
5361 | if (startblock == DELAYSTARTBLOCK) |
5362 | out->bmv_block = -2; | |
5363 | else | |
9d87c319 | 5364 | out->bmv_block = xfs_fsb_to_db(ip, startblock); |
5af317c9 ES |
5365 | fileblock = XFS_BB_TO_FSB(ip->i_mount, out->bmv_offset); |
5366 | ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); | |
5367 | if (xfs_iext_bno_to_ext(ifp, fileblock, &lastx) && | |
5368 | (lastx == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))-1)) | |
5369 | out->bmv_oflags |= BMV_OF_LAST; | |
3bacbcd8 VA |
5370 | } |
5371 | ||
5372 | return 1; | |
5373 | } | |
5374 | ||
1da177e4 | 5375 | /* |
8a7141a8 ES |
5376 | * Get inode's extents as described in bmv, and format for output. |
5377 | * Calls formatter to fill the user's buffer until all extents | |
5378 | * are mapped, until the passed-in bmv->bmv_count slots have | |
5379 | * been filled, or until the formatter short-circuits the loop, | |
5380 | * if it is tracking filled-in extents on its own. | |
1da177e4 LT |
5381 | */ |
5382 | int /* error code */ | |
5383 | xfs_getbmap( | |
993386c1 | 5384 | xfs_inode_t *ip, |
8a7141a8 ES |
5385 | struct getbmapx *bmv, /* user bmap structure */ |
5386 | xfs_bmap_format_t formatter, /* format to user */ | |
5387 | void *arg) /* formatter arg */ | |
1da177e4 LT |
5388 | { |
5389 | __int64_t bmvend; /* last block requested */ | |
4be4a00f | 5390 | int error = 0; /* return value */ |
1da177e4 LT |
5391 | __int64_t fixlen; /* length for -1 case */ |
5392 | int i; /* extent number */ | |
1da177e4 LT |
5393 | int lock; /* lock state */ |
5394 | xfs_bmbt_irec_t *map; /* buffer for user's data */ | |
5395 | xfs_mount_t *mp; /* file system mount point */ | |
5396 | int nex; /* # of user extents can do */ | |
5397 | int nexleft; /* # of user extents left */ | |
5398 | int subnex; /* # of bmapi's can do */ | |
5399 | int nmap; /* number of map entries */ | |
6321e3ed | 5400 | struct getbmapx *out; /* output structure */ |
1da177e4 LT |
5401 | int whichfork; /* data or attr fork */ |
5402 | int prealloced; /* this is a file with | |
5403 | * preallocated data space */ | |
8a7141a8 | 5404 | int iflags; /* interface flags */ |
1da177e4 | 5405 | int bmapi_flags; /* flags for xfs_bmapi */ |
6321e3ed | 5406 | int cur_ext = 0; |
1da177e4 | 5407 | |
1da177e4 | 5408 | mp = ip->i_mount; |
8a7141a8 | 5409 | iflags = bmv->bmv_iflags; |
8a7141a8 | 5410 | whichfork = iflags & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK; |
1da177e4 | 5411 | |
1da177e4 LT |
5412 | if (whichfork == XFS_ATTR_FORK) { |
5413 | if (XFS_IFORK_Q(ip)) { | |
5414 | if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS && | |
5415 | ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE && | |
5416 | ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL) | |
5417 | return XFS_ERROR(EINVAL); | |
5418 | } else if (unlikely( | |
5419 | ip->i_d.di_aformat != 0 && | |
5420 | ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) { | |
5421 | XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW, | |
5422 | ip->i_mount); | |
5423 | return XFS_ERROR(EFSCORRUPTED); | |
5424 | } | |
4be4a00f CH |
5425 | |
5426 | prealloced = 0; | |
5427 | fixlen = 1LL << 32; | |
5428 | } else { | |
4be4a00f CH |
5429 | if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS && |
5430 | ip->i_d.di_format != XFS_DINODE_FMT_BTREE && | |
5431 | ip->i_d.di_format != XFS_DINODE_FMT_LOCAL) | |
5432 | return XFS_ERROR(EINVAL); | |
5433 | ||
957d0ebe | 5434 | if (xfs_get_extsz_hint(ip) || |
dd9f438e | 5435 | ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){ |
1da177e4 LT |
5436 | prealloced = 1; |
5437 | fixlen = XFS_MAXIOFFSET(mp); | |
5438 | } else { | |
5439 | prealloced = 0; | |
ba87ea69 | 5440 | fixlen = ip->i_size; |
1da177e4 | 5441 | } |
1da177e4 LT |
5442 | } |
5443 | ||
5444 | if (bmv->bmv_length == -1) { | |
5445 | fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen)); | |
4be4a00f CH |
5446 | bmv->bmv_length = |
5447 | max_t(__int64_t, fixlen - bmv->bmv_offset, 0); | |
5448 | } else if (bmv->bmv_length == 0) { | |
1da177e4 LT |
5449 | bmv->bmv_entries = 0; |
5450 | return 0; | |
4be4a00f CH |
5451 | } else if (bmv->bmv_length < 0) { |
5452 | return XFS_ERROR(EINVAL); | |
1da177e4 | 5453 | } |
4be4a00f | 5454 | |
1da177e4 LT |
5455 | nex = bmv->bmv_count - 1; |
5456 | if (nex <= 0) | |
5457 | return XFS_ERROR(EINVAL); | |
5458 | bmvend = bmv->bmv_offset + bmv->bmv_length; | |
5459 | ||
6321e3ed CH |
5460 | |
5461 | if (bmv->bmv_count > ULONG_MAX / sizeof(struct getbmapx)) | |
5462 | return XFS_ERROR(ENOMEM); | |
5463 | out = kmem_zalloc(bmv->bmv_count * sizeof(struct getbmapx), KM_MAYFAIL); | |
5464 | if (!out) | |
5465 | return XFS_ERROR(ENOMEM); | |
5466 | ||
1da177e4 | 5467 | xfs_ilock(ip, XFS_IOLOCK_SHARED); |
4be4a00f CH |
5468 | if (whichfork == XFS_DATA_FORK && !(iflags & BMV_IF_DELALLOC)) { |
5469 | if (ip->i_delayed_blks || ip->i_size > ip->i_d.di_size) { | |
5470 | error = xfs_flush_pages(ip, 0, -1, 0, FI_REMAPF); | |
5471 | if (error) | |
5472 | goto out_unlock_iolock; | |
e12070a5 | 5473 | } |
309c8480 DC |
5474 | /* |
5475 | * even after flushing the inode, there can still be delalloc | |
5476 | * blocks on the inode beyond EOF due to speculative | |
5477 | * preallocation. These are not removed until the release | |
5478 | * function is called or the inode is inactivated. Hence we | |
5479 | * cannot assert here that ip->i_delayed_blks == 0. | |
5480 | */ | |
4be4a00f | 5481 | } |
1da177e4 LT |
5482 | |
5483 | lock = xfs_ilock_map_shared(ip); | |
5484 | ||
5485 | /* | |
5486 | * Don't let nex be bigger than the number of extents | |
5487 | * we can have assuming alternating holes and real extents. | |
5488 | */ | |
5489 | if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1) | |
5490 | nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1; | |
5491 | ||
4be4a00f CH |
5492 | bmapi_flags = xfs_bmapi_aflag(whichfork); |
5493 | if (!(iflags & BMV_IF_PREALLOC)) | |
5494 | bmapi_flags |= XFS_BMAPI_IGSTATE; | |
1da177e4 LT |
5495 | |
5496 | /* | |
5497 | * Allocate enough space to handle "subnex" maps at a time. | |
5498 | */ | |
4be4a00f | 5499 | error = ENOMEM; |
1da177e4 | 5500 | subnex = 16; |
ca35dcd6 | 5501 | map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL | KM_NOFS); |
4be4a00f CH |
5502 | if (!map) |
5503 | goto out_unlock_ilock; | |
1da177e4 LT |
5504 | |
5505 | bmv->bmv_entries = 0; | |
5506 | ||
4be4a00f CH |
5507 | if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0 && |
5508 | (whichfork == XFS_ATTR_FORK || !(iflags & BMV_IF_DELALLOC))) { | |
5509 | error = 0; | |
5510 | goto out_free_map; | |
1da177e4 LT |
5511 | } |
5512 | ||
5513 | nexleft = nex; | |
5514 | ||
5515 | do { | |
5516 | nmap = (nexleft > subnex) ? subnex : nexleft; | |
5517 | error = xfs_bmapi(NULL, ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset), | |
5518 | XFS_BB_TO_FSB(mp, bmv->bmv_length), | |
3e57ecf6 | 5519 | bmapi_flags, NULL, 0, map, &nmap, |
b4e9181e | 5520 | NULL); |
1da177e4 | 5521 | if (error) |
4be4a00f | 5522 | goto out_free_map; |
1da177e4 LT |
5523 | ASSERT(nmap <= subnex); |
5524 | ||
5525 | for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) { | |
6321e3ed | 5526 | out[cur_ext].bmv_oflags = 0; |
5af317c9 | 5527 | if (map[i].br_state == XFS_EXT_UNWRITTEN) |
6321e3ed | 5528 | out[cur_ext].bmv_oflags |= BMV_OF_PREALLOC; |
5af317c9 | 5529 | else if (map[i].br_startblock == DELAYSTARTBLOCK) |
6321e3ed CH |
5530 | out[cur_ext].bmv_oflags |= BMV_OF_DELALLOC; |
5531 | out[cur_ext].bmv_offset = | |
5532 | XFS_FSB_TO_BB(mp, map[i].br_startoff); | |
5533 | out[cur_ext].bmv_length = | |
5534 | XFS_FSB_TO_BB(mp, map[i].br_blockcount); | |
5535 | out[cur_ext].bmv_unused1 = 0; | |
5536 | out[cur_ext].bmv_unused2 = 0; | |
5af317c9 ES |
5537 | ASSERT(((iflags & BMV_IF_DELALLOC) != 0) || |
5538 | (map[i].br_startblock != DELAYSTARTBLOCK)); | |
9af0a70c | 5539 | if (map[i].br_startblock == HOLESTARTBLOCK && |
3bacbcd8 VA |
5540 | whichfork == XFS_ATTR_FORK) { |
5541 | /* came to the end of attribute fork */ | |
6321e3ed | 5542 | out[cur_ext].bmv_oflags |= BMV_OF_LAST; |
4be4a00f | 5543 | goto out_free_map; |
1da177e4 | 5544 | } |
4be4a00f | 5545 | |
6321e3ed CH |
5546 | if (!xfs_getbmapx_fix_eof_hole(ip, &out[cur_ext], |
5547 | prealloced, bmvend, | |
5548 | map[i].br_startblock)) | |
4be4a00f CH |
5549 | goto out_free_map; |
5550 | ||
4be4a00f | 5551 | bmv->bmv_offset = |
6321e3ed CH |
5552 | out[cur_ext].bmv_offset + |
5553 | out[cur_ext].bmv_length; | |
4be4a00f CH |
5554 | bmv->bmv_length = |
5555 | max_t(__int64_t, 0, bmvend - bmv->bmv_offset); | |
9af25465 TM |
5556 | |
5557 | /* | |
5558 | * In case we don't want to return the hole, | |
5559 | * don't increase cur_ext so that we can reuse | |
5560 | * it in the next loop. | |
5561 | */ | |
5562 | if ((iflags & BMV_IF_NO_HOLES) && | |
5563 | map[i].br_startblock == HOLESTARTBLOCK) { | |
5564 | memset(&out[cur_ext], 0, sizeof(out[cur_ext])); | |
5565 | continue; | |
5566 | } | |
5567 | ||
5568 | nexleft--; | |
4be4a00f | 5569 | bmv->bmv_entries++; |
6321e3ed | 5570 | cur_ext++; |
1da177e4 LT |
5571 | } |
5572 | } while (nmap && nexleft && bmv->bmv_length); | |
5573 | ||
4be4a00f CH |
5574 | out_free_map: |
5575 | kmem_free(map); | |
5576 | out_unlock_ilock: | |
1da177e4 | 5577 | xfs_iunlock_map_shared(ip, lock); |
4be4a00f | 5578 | out_unlock_iolock: |
1da177e4 | 5579 | xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
6321e3ed CH |
5580 | |
5581 | for (i = 0; i < cur_ext; i++) { | |
5582 | int full = 0; /* user array is full */ | |
5583 | ||
5584 | /* format results & advance arg */ | |
5585 | error = formatter(&arg, &out[i], &full); | |
5586 | if (error || full) | |
5587 | break; | |
5588 | } | |
5589 | ||
7747a0b0 | 5590 | kmem_free(out); |
1da177e4 LT |
5591 | return error; |
5592 | } | |
5593 | ||
5594 | /* | |
5595 | * Check the last inode extent to determine whether this allocation will result | |
5596 | * in blocks being allocated at the end of the file. When we allocate new data | |
5597 | * blocks at the end of the file which do not start at the previous data block, | |
5598 | * we will try to align the new blocks at stripe unit boundaries. | |
5599 | */ | |
ba0f32d4 | 5600 | STATIC int /* error */ |
1da177e4 LT |
5601 | xfs_bmap_isaeof( |
5602 | xfs_inode_t *ip, /* incore inode pointer */ | |
5603 | xfs_fileoff_t off, /* file offset in fsblocks */ | |
5604 | int whichfork, /* data or attribute fork */ | |
5605 | char *aeof) /* return value */ | |
5606 | { | |
5607 | int error; /* error return value */ | |
5608 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
a6f64d4a | 5609 | xfs_bmbt_rec_host_t *lastrec; /* extent record pointer */ |
4eea22f0 MK |
5610 | xfs_extnum_t nextents; /* number of file extents */ |
5611 | xfs_bmbt_irec_t s; /* expanded extent record */ | |
1da177e4 LT |
5612 | |
5613 | ASSERT(whichfork == XFS_DATA_FORK); | |
5614 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5615 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
5616 | (error = xfs_iread_extents(NULL, ip, whichfork))) | |
5617 | return error; | |
5618 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
5619 | if (nextents == 0) { | |
5620 | *aeof = 1; | |
5621 | return 0; | |
5622 | } | |
5623 | /* | |
5624 | * Go to the last extent | |
5625 | */ | |
4eea22f0 | 5626 | lastrec = xfs_iext_get_ext(ifp, nextents - 1); |
1da177e4 LT |
5627 | xfs_bmbt_get_all(lastrec, &s); |
5628 | /* | |
5629 | * Check we are allocating in the last extent (for delayed allocations) | |
5630 | * or past the last extent for non-delayed allocations. | |
5631 | */ | |
5632 | *aeof = (off >= s.br_startoff && | |
5633 | off < s.br_startoff + s.br_blockcount && | |
9d87c319 | 5634 | isnullstartblock(s.br_startblock)) || |
1da177e4 LT |
5635 | off >= s.br_startoff + s.br_blockcount; |
5636 | return 0; | |
5637 | } | |
5638 | ||
5639 | /* | |
5640 | * Check if the endoff is outside the last extent. If so the caller will grow | |
5641 | * the allocation to a stripe unit boundary. | |
5642 | */ | |
5643 | int /* error */ | |
5644 | xfs_bmap_eof( | |
5645 | xfs_inode_t *ip, /* incore inode pointer */ | |
5646 | xfs_fileoff_t endoff, /* file offset in fsblocks */ | |
5647 | int whichfork, /* data or attribute fork */ | |
5648 | int *eof) /* result value */ | |
5649 | { | |
5650 | xfs_fsblock_t blockcount; /* extent block count */ | |
5651 | int error; /* error return value */ | |
5652 | xfs_ifork_t *ifp; /* inode fork pointer */ | |
a6f64d4a | 5653 | xfs_bmbt_rec_host_t *lastrec; /* extent record pointer */ |
4eea22f0 | 5654 | xfs_extnum_t nextents; /* number of file extents */ |
1da177e4 LT |
5655 | xfs_fileoff_t startoff; /* extent starting file offset */ |
5656 | ||
5657 | ASSERT(whichfork == XFS_DATA_FORK); | |
5658 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5659 | if (!(ifp->if_flags & XFS_IFEXTENTS) && | |
5660 | (error = xfs_iread_extents(NULL, ip, whichfork))) | |
5661 | return error; | |
5662 | nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t); | |
5663 | if (nextents == 0) { | |
5664 | *eof = 1; | |
5665 | return 0; | |
5666 | } | |
5667 | /* | |
5668 | * Go to the last extent | |
5669 | */ | |
4eea22f0 | 5670 | lastrec = xfs_iext_get_ext(ifp, nextents - 1); |
1da177e4 LT |
5671 | startoff = xfs_bmbt_get_startoff(lastrec); |
5672 | blockcount = xfs_bmbt_get_blockcount(lastrec); | |
5673 | *eof = endoff >= startoff + blockcount; | |
5674 | return 0; | |
5675 | } | |
5676 | ||
5677 | #ifdef DEBUG | |
ecd7f082 | 5678 | STATIC struct xfs_buf * |
1da177e4 | 5679 | xfs_bmap_get_bp( |
ecd7f082 | 5680 | struct xfs_btree_cur *cur, |
1da177e4 LT |
5681 | xfs_fsblock_t bno) |
5682 | { | |
ecd7f082 CH |
5683 | struct xfs_log_item_desc *lidp; |
5684 | int i; | |
1da177e4 LT |
5685 | |
5686 | if (!cur) | |
ecd7f082 CH |
5687 | return NULL; |
5688 | ||
5689 | for (i = 0; i < XFS_BTREE_MAXLEVELS; i++) { | |
5690 | if (!cur->bc_bufs[i]) | |
5691 | break; | |
5692 | if (XFS_BUF_ADDR(cur->bc_bufs[i]) == bno) | |
5693 | return cur->bc_bufs[i]; | |
1da177e4 | 5694 | } |
1da177e4 | 5695 | |
ecd7f082 CH |
5696 | /* Chase down all the log items to see if the bp is there */ |
5697 | list_for_each_entry(lidp, &cur->bc_tp->t_items, lid_trans) { | |
e98c414f | 5698 | struct xfs_buf_log_item *bip; |
ecd7f082 CH |
5699 | bip = (struct xfs_buf_log_item *)lidp->lid_item; |
5700 | if (bip->bli_item.li_type == XFS_LI_BUF && | |
5701 | XFS_BUF_ADDR(bip->bli_buf) == bno) | |
5702 | return bip->bli_buf; | |
1da177e4 | 5703 | } |
e98c414f | 5704 | |
ecd7f082 | 5705 | return NULL; |
1da177e4 LT |
5706 | } |
5707 | ||
3180e66d | 5708 | STATIC void |
1da177e4 | 5709 | xfs_check_block( |
7cc95a82 | 5710 | struct xfs_btree_block *block, |
1da177e4 LT |
5711 | xfs_mount_t *mp, |
5712 | int root, | |
5713 | short sz) | |
5714 | { | |
5715 | int i, j, dmxr; | |
576039cf | 5716 | __be64 *pp, *thispa; /* pointer to block address */ |
1da177e4 LT |
5717 | xfs_bmbt_key_t *prevp, *keyp; |
5718 | ||
16259e7d | 5719 | ASSERT(be16_to_cpu(block->bb_level) > 0); |
1da177e4 LT |
5720 | |
5721 | prevp = NULL; | |
7cc95a82 | 5722 | for( i = 1; i <= xfs_btree_get_numrecs(block); i++) { |
1da177e4 | 5723 | dmxr = mp->m_bmap_dmxr[0]; |
136341b4 | 5724 | keyp = XFS_BMBT_KEY_ADDR(mp, block, i); |
1da177e4 LT |
5725 | |
5726 | if (prevp) { | |
4a26e66e CH |
5727 | ASSERT(be64_to_cpu(prevp->br_startoff) < |
5728 | be64_to_cpu(keyp->br_startoff)); | |
1da177e4 LT |
5729 | } |
5730 | prevp = keyp; | |
5731 | ||
5732 | /* | |
5733 | * Compare the block numbers to see if there are dups. | |
5734 | */ | |
136341b4 | 5735 | if (root) |
60197e8d | 5736 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, i, sz); |
136341b4 CH |
5737 | else |
5738 | pp = XFS_BMBT_PTR_ADDR(mp, block, i, dmxr); | |
5739 | ||
16259e7d | 5740 | for (j = i+1; j <= be16_to_cpu(block->bb_numrecs); j++) { |
136341b4 | 5741 | if (root) |
60197e8d | 5742 | thispa = XFS_BMAP_BROOT_PTR_ADDR(mp, block, j, sz); |
136341b4 CH |
5743 | else |
5744 | thispa = XFS_BMBT_PTR_ADDR(mp, block, j, dmxr); | |
576039cf | 5745 | if (*thispa == *pp) { |
1da177e4 | 5746 | cmn_err(CE_WARN, "%s: thispa(%d) == pp(%d) %Ld", |
34a622b2 | 5747 | __func__, j, i, |
576039cf | 5748 | (unsigned long long)be64_to_cpu(*thispa)); |
1da177e4 | 5749 | panic("%s: ptrs are equal in node\n", |
34a622b2 | 5750 | __func__); |
1da177e4 LT |
5751 | } |
5752 | } | |
5753 | } | |
5754 | } | |
5755 | ||
5756 | /* | |
5757 | * Check that the extents for the inode ip are in the right order in all | |
5758 | * btree leaves. | |
5759 | */ | |
5760 | ||
5761 | STATIC void | |
5762 | xfs_bmap_check_leaf_extents( | |
5763 | xfs_btree_cur_t *cur, /* btree cursor or null */ | |
5764 | xfs_inode_t *ip, /* incore inode pointer */ | |
5765 | int whichfork) /* data or attr fork */ | |
5766 | { | |
7cc95a82 | 5767 | struct xfs_btree_block *block; /* current btree block */ |
1da177e4 LT |
5768 | xfs_fsblock_t bno; /* block # of "block" */ |
5769 | xfs_buf_t *bp; /* buffer for "block" */ | |
5770 | int error; /* error return value */ | |
4eea22f0 | 5771 | xfs_extnum_t i=0, j; /* index into the extents list */ |
1da177e4 LT |
5772 | xfs_ifork_t *ifp; /* fork structure */ |
5773 | int level; /* btree level, for checking */ | |
5774 | xfs_mount_t *mp; /* file system mount structure */ | |
576039cf | 5775 | __be64 *pp; /* pointer to block address */ |
4eea22f0 | 5776 | xfs_bmbt_rec_t *ep; /* pointer to current extent */ |
2abdb8c8 | 5777 | xfs_bmbt_rec_t last = {0, 0}; /* last extent in prev block */ |
4eea22f0 | 5778 | xfs_bmbt_rec_t *nextp; /* pointer to next extent */ |
1da177e4 LT |
5779 | int bp_release = 0; |
5780 | ||
5781 | if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE) { | |
5782 | return; | |
5783 | } | |
5784 | ||
5785 | bno = NULLFSBLOCK; | |
5786 | mp = ip->i_mount; | |
5787 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5788 | block = ifp->if_broot; | |
5789 | /* | |
5790 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. | |
5791 | */ | |
16259e7d CH |
5792 | level = be16_to_cpu(block->bb_level); |
5793 | ASSERT(level > 0); | |
1da177e4 | 5794 | xfs_check_block(block, mp, 1, ifp->if_broot_bytes); |
60197e8d | 5795 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); |
576039cf CH |
5796 | bno = be64_to_cpu(*pp); |
5797 | ||
5798 | ASSERT(bno != NULLDFSBNO); | |
5799 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); | |
5800 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
5801 | ||
1da177e4 LT |
5802 | /* |
5803 | * Go down the tree until leaf level is reached, following the first | |
5804 | * pointer (leftmost) at each level. | |
5805 | */ | |
5806 | while (level-- > 0) { | |
5807 | /* See if buf is in cur first */ | |
5808 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
5809 | if (bp) { | |
5810 | bp_release = 0; | |
5811 | } else { | |
5812 | bp_release = 1; | |
5813 | } | |
5814 | if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
5815 | XFS_BMAP_BTREE_REF))) | |
5816 | goto error_norelse; | |
7cc95a82 | 5817 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 | 5818 | XFS_WANT_CORRUPTED_GOTO( |
4e8938fe | 5819 | xfs_bmap_sanity_check(mp, bp, level), |
1da177e4 LT |
5820 | error0); |
5821 | if (level == 0) | |
5822 | break; | |
5823 | ||
5824 | /* | |
5825 | * Check this block for basic sanity (increasing keys and | |
5826 | * no duplicate blocks). | |
5827 | */ | |
5828 | ||
5829 | xfs_check_block(block, mp, 0, 0); | |
136341b4 | 5830 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); |
576039cf CH |
5831 | bno = be64_to_cpu(*pp); |
5832 | XFS_WANT_CORRUPTED_GOTO(XFS_FSB_SANITY_CHECK(mp, bno), error0); | |
1da177e4 LT |
5833 | if (bp_release) { |
5834 | bp_release = 0; | |
5835 | xfs_trans_brelse(NULL, bp); | |
5836 | } | |
5837 | } | |
5838 | ||
5839 | /* | |
5840 | * Here with bp and block set to the leftmost leaf node in the tree. | |
5841 | */ | |
5842 | i = 0; | |
5843 | ||
5844 | /* | |
5845 | * Loop over all leaf nodes checking that all extents are in the right order. | |
5846 | */ | |
1da177e4 | 5847 | for (;;) { |
1da177e4 LT |
5848 | xfs_fsblock_t nextbno; |
5849 | xfs_extnum_t num_recs; | |
5850 | ||
5851 | ||
7cc95a82 | 5852 | num_recs = xfs_btree_get_numrecs(block); |
1da177e4 LT |
5853 | |
5854 | /* | |
5855 | * Read-ahead the next leaf block, if any. | |
5856 | */ | |
5857 | ||
7cc95a82 | 5858 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1da177e4 LT |
5859 | |
5860 | /* | |
5861 | * Check all the extents to make sure they are OK. | |
5862 | * If we had a previous block, the last entry should | |
5863 | * conform with the first entry in this one. | |
5864 | */ | |
5865 | ||
136341b4 | 5866 | ep = XFS_BMBT_REC_ADDR(mp, block, 1); |
2abdb8c8 | 5867 | if (i) { |
4a26e66e CH |
5868 | ASSERT(xfs_bmbt_disk_get_startoff(&last) + |
5869 | xfs_bmbt_disk_get_blockcount(&last) <= | |
5870 | xfs_bmbt_disk_get_startoff(ep)); | |
2abdb8c8 | 5871 | } |
4eea22f0 | 5872 | for (j = 1; j < num_recs; j++) { |
136341b4 | 5873 | nextp = XFS_BMBT_REC_ADDR(mp, block, j + 1); |
4a26e66e CH |
5874 | ASSERT(xfs_bmbt_disk_get_startoff(ep) + |
5875 | xfs_bmbt_disk_get_blockcount(ep) <= | |
5876 | xfs_bmbt_disk_get_startoff(nextp)); | |
4eea22f0 | 5877 | ep = nextp; |
1da177e4 | 5878 | } |
1da177e4 | 5879 | |
2abdb8c8 | 5880 | last = *ep; |
1da177e4 LT |
5881 | i += num_recs; |
5882 | if (bp_release) { | |
5883 | bp_release = 0; | |
5884 | xfs_trans_brelse(NULL, bp); | |
5885 | } | |
5886 | bno = nextbno; | |
5887 | /* | |
5888 | * If we've reached the end, stop. | |
5889 | */ | |
5890 | if (bno == NULLFSBLOCK) | |
5891 | break; | |
5892 | ||
5893 | bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno)); | |
5894 | if (bp) { | |
5895 | bp_release = 0; | |
5896 | } else { | |
5897 | bp_release = 1; | |
5898 | } | |
5899 | if (!bp && (error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp, | |
5900 | XFS_BMAP_BTREE_REF))) | |
5901 | goto error_norelse; | |
7cc95a82 | 5902 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 LT |
5903 | } |
5904 | if (bp_release) { | |
5905 | bp_release = 0; | |
5906 | xfs_trans_brelse(NULL, bp); | |
5907 | } | |
5908 | return; | |
5909 | ||
5910 | error0: | |
34a622b2 | 5911 | cmn_err(CE_WARN, "%s: at error0", __func__); |
1da177e4 LT |
5912 | if (bp_release) |
5913 | xfs_trans_brelse(NULL, bp); | |
5914 | error_norelse: | |
5915 | cmn_err(CE_WARN, "%s: BAD after btree leaves for %d extents", | |
34a622b2 HH |
5916 | __func__, i); |
5917 | panic("%s: CORRUPTED BTREE OR SOMETHING", __func__); | |
1da177e4 LT |
5918 | return; |
5919 | } | |
5920 | #endif | |
5921 | ||
5922 | /* | |
5923 | * Count fsblocks of the given fork. | |
5924 | */ | |
5925 | int /* error */ | |
5926 | xfs_bmap_count_blocks( | |
5927 | xfs_trans_t *tp, /* transaction pointer */ | |
5928 | xfs_inode_t *ip, /* incore inode */ | |
5929 | int whichfork, /* data or attr fork */ | |
5930 | int *count) /* out: count of blocks */ | |
5931 | { | |
7cc95a82 | 5932 | struct xfs_btree_block *block; /* current btree block */ |
1da177e4 LT |
5933 | xfs_fsblock_t bno; /* block # of "block" */ |
5934 | xfs_ifork_t *ifp; /* fork structure */ | |
5935 | int level; /* btree level, for checking */ | |
5936 | xfs_mount_t *mp; /* file system mount structure */ | |
576039cf | 5937 | __be64 *pp; /* pointer to block address */ |
1da177e4 LT |
5938 | |
5939 | bno = NULLFSBLOCK; | |
5940 | mp = ip->i_mount; | |
5941 | ifp = XFS_IFORK_PTR(ip, whichfork); | |
5942 | if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) { | |
c94312de | 5943 | xfs_bmap_count_leaves(ifp, 0, |
1da177e4 | 5944 | ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t), |
c94312de | 5945 | count); |
1da177e4 LT |
5946 | return 0; |
5947 | } | |
5948 | ||
5949 | /* | |
5950 | * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out. | |
5951 | */ | |
5952 | block = ifp->if_broot; | |
16259e7d CH |
5953 | level = be16_to_cpu(block->bb_level); |
5954 | ASSERT(level > 0); | |
60197e8d | 5955 | pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes); |
576039cf CH |
5956 | bno = be64_to_cpu(*pp); |
5957 | ASSERT(bno != NULLDFSBNO); | |
5958 | ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount); | |
5959 | ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks); | |
1da177e4 | 5960 | |
4eea22f0 | 5961 | if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) { |
1da177e4 LT |
5962 | XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW, |
5963 | mp); | |
5964 | return XFS_ERROR(EFSCORRUPTED); | |
5965 | } | |
5966 | ||
5967 | return 0; | |
5968 | } | |
5969 | ||
5970 | /* | |
5971 | * Recursively walks each level of a btree | |
5972 | * to count total fsblocks is use. | |
5973 | */ | |
a8272ce0 | 5974 | STATIC int /* error */ |
1da177e4 LT |
5975 | xfs_bmap_count_tree( |
5976 | xfs_mount_t *mp, /* file system mount point */ | |
5977 | xfs_trans_t *tp, /* transaction pointer */ | |
4eea22f0 | 5978 | xfs_ifork_t *ifp, /* inode fork pointer */ |
1da177e4 LT |
5979 | xfs_fsblock_t blockno, /* file system block number */ |
5980 | int levelin, /* level in btree */ | |
5981 | int *count) /* Count of blocks */ | |
5982 | { | |
5983 | int error; | |
5984 | xfs_buf_t *bp, *nbp; | |
5985 | int level = levelin; | |
576039cf | 5986 | __be64 *pp; |
1da177e4 LT |
5987 | xfs_fsblock_t bno = blockno; |
5988 | xfs_fsblock_t nextbno; | |
7cc95a82 | 5989 | struct xfs_btree_block *block, *nextblock; |
1da177e4 | 5990 | int numrecs; |
1da177e4 LT |
5991 | |
5992 | if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF))) | |
5993 | return error; | |
5994 | *count += 1; | |
7cc95a82 | 5995 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 LT |
5996 | |
5997 | if (--level) { | |
9da096fd | 5998 | /* Not at node above leaves, count this level of nodes */ |
7cc95a82 | 5999 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
1da177e4 LT |
6000 | while (nextbno != NULLFSBLOCK) { |
6001 | if ((error = xfs_btree_read_bufl(mp, tp, nextbno, | |
6002 | 0, &nbp, XFS_BMAP_BTREE_REF))) | |
6003 | return error; | |
6004 | *count += 1; | |
7cc95a82 CH |
6005 | nextblock = XFS_BUF_TO_BLOCK(nbp); |
6006 | nextbno = be64_to_cpu(nextblock->bb_u.l.bb_rightsib); | |
1da177e4 LT |
6007 | xfs_trans_brelse(tp, nbp); |
6008 | } | |
6009 | ||
6010 | /* Dive to the next level */ | |
136341b4 | 6011 | pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]); |
576039cf | 6012 | bno = be64_to_cpu(*pp); |
1da177e4 | 6013 | if (unlikely((error = |
4eea22f0 | 6014 | xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) { |
1da177e4 LT |
6015 | xfs_trans_brelse(tp, bp); |
6016 | XFS_ERROR_REPORT("xfs_bmap_count_tree(1)", | |
6017 | XFS_ERRLEVEL_LOW, mp); | |
6018 | return XFS_ERROR(EFSCORRUPTED); | |
6019 | } | |
6020 | xfs_trans_brelse(tp, bp); | |
6021 | } else { | |
6022 | /* count all level 1 nodes and their leaves */ | |
6023 | for (;;) { | |
7cc95a82 | 6024 | nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib); |
16259e7d | 6025 | numrecs = be16_to_cpu(block->bb_numrecs); |
136341b4 | 6026 | xfs_bmap_disk_count_leaves(mp, block, numrecs, count); |
1da177e4 LT |
6027 | xfs_trans_brelse(tp, bp); |
6028 | if (nextbno == NULLFSBLOCK) | |
6029 | break; | |
6030 | bno = nextbno; | |
6031 | if ((error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, | |
6032 | XFS_BMAP_BTREE_REF))) | |
6033 | return error; | |
6034 | *count += 1; | |
7cc95a82 | 6035 | block = XFS_BUF_TO_BLOCK(bp); |
1da177e4 LT |
6036 | } |
6037 | } | |
6038 | return 0; | |
6039 | } | |
6040 | ||
6041 | /* | |
4eea22f0 | 6042 | * Count leaf blocks given a range of extent records. |
1da177e4 | 6043 | */ |
c94312de | 6044 | STATIC void |
1da177e4 | 6045 | xfs_bmap_count_leaves( |
4eea22f0 MK |
6046 | xfs_ifork_t *ifp, |
6047 | xfs_extnum_t idx, | |
1da177e4 LT |
6048 | int numrecs, |
6049 | int *count) | |
6050 | { | |
6051 | int b; | |
6052 | ||
4eea22f0 | 6053 | for (b = 0; b < numrecs; b++) { |
a6f64d4a | 6054 | xfs_bmbt_rec_host_t *frp = xfs_iext_get_ext(ifp, idx + b); |
91e11088 | 6055 | *count += xfs_bmbt_get_blockcount(frp); |
4eea22f0 | 6056 | } |
91e11088 YL |
6057 | } |
6058 | ||
6059 | /* | |
4eea22f0 MK |
6060 | * Count leaf blocks given a range of extent records originally |
6061 | * in btree format. | |
91e11088 | 6062 | */ |
c94312de | 6063 | STATIC void |
91e11088 | 6064 | xfs_bmap_disk_count_leaves( |
136341b4 | 6065 | struct xfs_mount *mp, |
7cc95a82 | 6066 | struct xfs_btree_block *block, |
91e11088 YL |
6067 | int numrecs, |
6068 | int *count) | |
6069 | { | |
6070 | int b; | |
4eea22f0 | 6071 | xfs_bmbt_rec_t *frp; |
91e11088 | 6072 | |
4eea22f0 | 6073 | for (b = 1; b <= numrecs; b++) { |
136341b4 | 6074 | frp = XFS_BMBT_REC_ADDR(mp, block, b); |
1da177e4 | 6075 | *count += xfs_bmbt_disk_get_blockcount(frp); |
4eea22f0 | 6076 | } |
1da177e4 | 6077 | } |
c726de44 DC |
6078 | |
6079 | /* | |
6080 | * dead simple method of punching delalyed allocation blocks from a range in | |
6081 | * the inode. Walks a block at a time so will be slow, but is only executed in | |
6082 | * rare error cases so the overhead is not critical. This will alays punch out | |
6083 | * both the start and end blocks, even if the ranges only partially overlap | |
6084 | * them, so it is up to the caller to ensure that partial blocks are not | |
6085 | * passed in. | |
6086 | */ | |
6087 | int | |
6088 | xfs_bmap_punch_delalloc_range( | |
6089 | struct xfs_inode *ip, | |
6090 | xfs_fileoff_t start_fsb, | |
6091 | xfs_fileoff_t length) | |
6092 | { | |
6093 | xfs_fileoff_t remaining = length; | |
6094 | int error = 0; | |
6095 | ||
6096 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); | |
6097 | ||
6098 | do { | |
6099 | int done; | |
6100 | xfs_bmbt_irec_t imap; | |
6101 | int nimaps = 1; | |
6102 | xfs_fsblock_t firstblock; | |
6103 | xfs_bmap_free_t flist; | |
6104 | ||
6105 | /* | |
6106 | * Map the range first and check that it is a delalloc extent | |
6107 | * before trying to unmap the range. Otherwise we will be | |
6108 | * trying to remove a real extent (which requires a | |
6109 | * transaction) or a hole, which is probably a bad idea... | |
6110 | */ | |
6111 | error = xfs_bmapi(NULL, ip, start_fsb, 1, | |
6112 | XFS_BMAPI_ENTIRE, NULL, 0, &imap, | |
6113 | &nimaps, NULL); | |
6114 | ||
6115 | if (error) { | |
6116 | /* something screwed, just bail */ | |
6117 | if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { | |
6118 | xfs_fs_cmn_err(CE_ALERT, ip->i_mount, | |
6119 | "Failed delalloc mapping lookup ino %lld fsb %lld.", | |
6120 | ip->i_ino, start_fsb); | |
6121 | } | |
6122 | break; | |
6123 | } | |
6124 | if (!nimaps) { | |
6125 | /* nothing there */ | |
6126 | goto next_block; | |
6127 | } | |
6128 | if (imap.br_startblock != DELAYSTARTBLOCK) { | |
6129 | /* been converted, ignore */ | |
6130 | goto next_block; | |
6131 | } | |
6132 | WARN_ON(imap.br_blockcount == 0); | |
6133 | ||
6134 | /* | |
6135 | * Note: while we initialise the firstblock/flist pair, they | |
6136 | * should never be used because blocks should never be | |
6137 | * allocated or freed for a delalloc extent and hence we need | |
6138 | * don't cancel or finish them after the xfs_bunmapi() call. | |
6139 | */ | |
6140 | xfs_bmap_init(&flist, &firstblock); | |
6141 | error = xfs_bunmapi(NULL, ip, start_fsb, 1, 0, 1, &firstblock, | |
6142 | &flist, &done); | |
6143 | if (error) | |
6144 | break; | |
6145 | ||
6146 | ASSERT(!flist.xbf_count && !flist.xbf_first); | |
6147 | next_block: | |
6148 | start_fsb++; | |
6149 | remaining--; | |
6150 | } while(remaining > 0); | |
6151 | ||
6152 | return error; | |
6153 | } |