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" |
1da177e4 | 19 | #include "xfs_fs.h" |
a844f451 | 20 | #include "xfs_bit.h" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
24 | #include "xfs_sb.h" | |
25 | #include "xfs_ag.h" | |
1da177e4 LT |
26 | #include "xfs_dir2.h" |
27 | #include "xfs_alloc.h" | |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_quota.h" | |
30 | #include "xfs_mount.h" | |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
1da177e4 | 34 | #include "xfs_dir2_sf.h" |
a844f451 | 35 | #include "xfs_attr_sf.h" |
1da177e4 LT |
36 | #include "xfs_dinode.h" |
37 | #include "xfs_inode.h" | |
a844f451 NS |
38 | #include "xfs_ialloc.h" |
39 | #include "xfs_btree.h" | |
1da177e4 | 40 | #include "xfs_bmap.h" |
1da177e4 LT |
41 | #include "xfs_rtalloc.h" |
42 | #include "xfs_error.h" | |
43 | #include "xfs_itable.h" | |
44 | #include "xfs_rw.h" | |
45 | #include "xfs_acl.h" | |
1da177e4 LT |
46 | #include "xfs_attr.h" |
47 | #include "xfs_buf_item.h" | |
48 | #include "xfs_trans_space.h" | |
49 | #include "xfs_utils.h" | |
50 | #include "xfs_iomap.h" | |
51 | ||
52 | #if defined(XFS_RW_TRACE) | |
53 | void | |
54 | xfs_iomap_enter_trace( | |
55 | int tag, | |
541d7d3c | 56 | xfs_inode_t *ip, |
1da177e4 LT |
57 | xfs_off_t offset, |
58 | ssize_t count) | |
59 | { | |
1da177e4 LT |
60 | if (!ip->i_rwtrace) |
61 | return; | |
62 | ||
63 | ktrace_enter(ip->i_rwtrace, | |
64 | (void *)((unsigned long)tag), | |
65 | (void *)ip, | |
66 | (void *)((unsigned long)((ip->i_d.di_size >> 32) & 0xffffffff)), | |
67 | (void *)((unsigned long)(ip->i_d.di_size & 0xffffffff)), | |
68 | (void *)((unsigned long)((offset >> 32) & 0xffffffff)), | |
69 | (void *)((unsigned long)(offset & 0xffffffff)), | |
70 | (void *)((unsigned long)count), | |
613d7043 CH |
71 | (void *)((unsigned long)((ip->i_new_size >> 32) & 0xffffffff)), |
72 | (void *)((unsigned long)(ip->i_new_size & 0xffffffff)), | |
f1fdc848 | 73 | (void *)((unsigned long)current_pid()), |
1da177e4 LT |
74 | (void *)NULL, |
75 | (void *)NULL, | |
76 | (void *)NULL, | |
77 | (void *)NULL, | |
78 | (void *)NULL, | |
79 | (void *)NULL); | |
80 | } | |
81 | ||
82 | void | |
83 | xfs_iomap_map_trace( | |
84 | int tag, | |
541d7d3c | 85 | xfs_inode_t *ip, |
1da177e4 LT |
86 | xfs_off_t offset, |
87 | ssize_t count, | |
88 | xfs_iomap_t *iomapp, | |
89 | xfs_bmbt_irec_t *imapp, | |
90 | int flags) | |
91 | { | |
1da177e4 LT |
92 | if (!ip->i_rwtrace) |
93 | return; | |
94 | ||
95 | ktrace_enter(ip->i_rwtrace, | |
96 | (void *)((unsigned long)tag), | |
97 | (void *)ip, | |
98 | (void *)((unsigned long)((ip->i_d.di_size >> 32) & 0xffffffff)), | |
99 | (void *)((unsigned long)(ip->i_d.di_size & 0xffffffff)), | |
100 | (void *)((unsigned long)((offset >> 32) & 0xffffffff)), | |
101 | (void *)((unsigned long)(offset & 0xffffffff)), | |
102 | (void *)((unsigned long)count), | |
103 | (void *)((unsigned long)flags), | |
104 | (void *)((unsigned long)((iomapp->iomap_offset >> 32) & 0xffffffff)), | |
105 | (void *)((unsigned long)(iomapp->iomap_offset & 0xffffffff)), | |
106 | (void *)((unsigned long)(iomapp->iomap_delta)), | |
107 | (void *)((unsigned long)(iomapp->iomap_bsize)), | |
108 | (void *)((unsigned long)(iomapp->iomap_bn)), | |
109 | (void *)(__psint_t)(imapp->br_startoff), | |
110 | (void *)((unsigned long)(imapp->br_blockcount)), | |
111 | (void *)(__psint_t)(imapp->br_startblock)); | |
112 | } | |
113 | #else | |
114 | #define xfs_iomap_enter_trace(tag, io, offset, count) | |
115 | #define xfs_iomap_map_trace(tag, io, offset, count, iomapp, imapp, flags) | |
116 | #endif | |
117 | ||
118 | #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \ | |
119 | << mp->m_writeio_log) | |
120 | #define XFS_STRAT_WRITE_IMAPS 2 | |
121 | #define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP | |
122 | ||
123 | STATIC int | |
124 | xfs_imap_to_bmap( | |
541d7d3c | 125 | xfs_inode_t *ip, |
1da177e4 LT |
126 | xfs_off_t offset, |
127 | xfs_bmbt_irec_t *imap, | |
128 | xfs_iomap_t *iomapp, | |
129 | int imaps, /* Number of imap entries */ | |
130 | int iomaps, /* Number of iomap entries */ | |
131 | int flags) | |
132 | { | |
541d7d3c | 133 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
134 | int pbm; |
135 | xfs_fsblock_t start_block; | |
136 | ||
1da177e4 LT |
137 | |
138 | for (pbm = 0; imaps && pbm < iomaps; imaps--, iomapp++, imap++, pbm++) { | |
139 | iomapp->iomap_offset = XFS_FSB_TO_B(mp, imap->br_startoff); | |
140 | iomapp->iomap_delta = offset - iomapp->iomap_offset; | |
141 | iomapp->iomap_bsize = XFS_FSB_TO_B(mp, imap->br_blockcount); | |
142 | iomapp->iomap_flags = flags; | |
143 | ||
71ddabb9 | 144 | if (XFS_IS_REALTIME_INODE(ip)) { |
1da177e4 LT |
145 | iomapp->iomap_flags |= IOMAP_REALTIME; |
146 | iomapp->iomap_target = mp->m_rtdev_targp; | |
147 | } else { | |
148 | iomapp->iomap_target = mp->m_ddev_targp; | |
149 | } | |
150 | start_block = imap->br_startblock; | |
151 | if (start_block == HOLESTARTBLOCK) { | |
152 | iomapp->iomap_bn = IOMAP_DADDR_NULL; | |
153 | iomapp->iomap_flags |= IOMAP_HOLE; | |
154 | } else if (start_block == DELAYSTARTBLOCK) { | |
155 | iomapp->iomap_bn = IOMAP_DADDR_NULL; | |
156 | iomapp->iomap_flags |= IOMAP_DELAY; | |
157 | } else { | |
541d7d3c | 158 | iomapp->iomap_bn = XFS_FSB_TO_DB(ip, start_block); |
1da177e4 LT |
159 | if (ISUNWRITTEN(imap)) |
160 | iomapp->iomap_flags |= IOMAP_UNWRITTEN; | |
161 | } | |
162 | ||
1da177e4 LT |
163 | offset += iomapp->iomap_bsize - iomapp->iomap_delta; |
164 | } | |
165 | return pbm; /* Return the number filled */ | |
166 | } | |
167 | ||
168 | int | |
169 | xfs_iomap( | |
541d7d3c | 170 | xfs_inode_t *ip, |
1da177e4 LT |
171 | xfs_off_t offset, |
172 | ssize_t count, | |
173 | int flags, | |
174 | xfs_iomap_t *iomapp, | |
175 | int *niomaps) | |
176 | { | |
541d7d3c | 177 | xfs_mount_t *mp = ip->i_mount; |
1da177e4 LT |
178 | xfs_fileoff_t offset_fsb, end_fsb; |
179 | int error = 0; | |
180 | int lockmode = 0; | |
181 | xfs_bmbt_irec_t imap; | |
182 | int nimaps = 1; | |
183 | int bmapi_flags = 0; | |
184 | int iomap_flags = 0; | |
185 | ||
541d7d3c | 186 | ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG); |
541d7d3c | 187 | |
1da177e4 LT |
188 | if (XFS_FORCED_SHUTDOWN(mp)) |
189 | return XFS_ERROR(EIO); | |
190 | ||
7642861b | 191 | switch (flags & (BMAPI_READ | BMAPI_WRITE | BMAPI_ALLOCATE)) { |
1da177e4 | 192 | case BMAPI_READ: |
541d7d3c LM |
193 | xfs_iomap_enter_trace(XFS_IOMAP_READ_ENTER, ip, offset, count); |
194 | lockmode = xfs_ilock_map_shared(ip); | |
1da177e4 | 195 | bmapi_flags = XFS_BMAPI_ENTIRE; |
1da177e4 LT |
196 | break; |
197 | case BMAPI_WRITE: | |
541d7d3c | 198 | xfs_iomap_enter_trace(XFS_IOMAP_WRITE_ENTER, ip, offset, count); |
1da177e4 | 199 | lockmode = XFS_ILOCK_EXCL|XFS_EXTSIZE_WR; |
c31e8878 NS |
200 | if (flags & BMAPI_IGNSTATE) |
201 | bmapi_flags |= XFS_BMAPI_IGSTATE|XFS_BMAPI_ENTIRE; | |
541d7d3c | 202 | xfs_ilock(ip, lockmode); |
1da177e4 LT |
203 | break; |
204 | case BMAPI_ALLOCATE: | |
541d7d3c | 205 | xfs_iomap_enter_trace(XFS_IOMAP_ALLOC_ENTER, ip, offset, count); |
1da177e4 LT |
206 | lockmode = XFS_ILOCK_SHARED|XFS_EXTSIZE_RD; |
207 | bmapi_flags = XFS_BMAPI_ENTIRE; | |
541d7d3c | 208 | |
1da177e4 LT |
209 | /* Attempt non-blocking lock */ |
210 | if (flags & BMAPI_TRYLOCK) { | |
541d7d3c | 211 | if (!xfs_ilock_nowait(ip, lockmode)) |
1da177e4 LT |
212 | return XFS_ERROR(EAGAIN); |
213 | } else { | |
541d7d3c | 214 | xfs_ilock(ip, lockmode); |
1da177e4 LT |
215 | } |
216 | break; | |
1da177e4 LT |
217 | default: |
218 | BUG(); | |
219 | } | |
220 | ||
221 | ASSERT(offset <= mp->m_maxioffset); | |
222 | if ((xfs_fsize_t)offset + count > mp->m_maxioffset) | |
223 | count = mp->m_maxioffset - offset; | |
224 | end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); | |
225 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
226 | ||
541d7d3c | 227 | error = xfs_bmapi(NULL, ip, offset_fsb, |
1da177e4 LT |
228 | (xfs_filblks_t)(end_fsb - offset_fsb), |
229 | bmapi_flags, NULL, 0, &imap, | |
3e57ecf6 | 230 | &nimaps, NULL, NULL); |
1da177e4 LT |
231 | |
232 | if (error) | |
233 | goto out; | |
234 | ||
7642861b | 235 | switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE)) { |
1da177e4 LT |
236 | case BMAPI_WRITE: |
237 | /* If we found an extent, return it */ | |
68d1498c | 238 | if (nimaps && |
dd9f438e | 239 | (imap.br_startblock != HOLESTARTBLOCK) && |
68d1498c | 240 | (imap.br_startblock != DELAYSTARTBLOCK)) { |
541d7d3c | 241 | xfs_iomap_map_trace(XFS_IOMAP_WRITE_MAP, ip, |
1da177e4 LT |
242 | offset, count, iomapp, &imap, flags); |
243 | break; | |
244 | } | |
245 | ||
246 | if (flags & (BMAPI_DIRECT|BMAPI_MMAP)) { | |
541d7d3c LM |
247 | error = xfs_iomap_write_direct(ip, offset, count, flags, |
248 | &imap, &nimaps, nimaps); | |
1da177e4 | 249 | } else { |
541d7d3c LM |
250 | error = xfs_iomap_write_delay(ip, offset, count, flags, |
251 | &imap, &nimaps); | |
1da177e4 LT |
252 | } |
253 | if (!error) { | |
541d7d3c | 254 | xfs_iomap_map_trace(XFS_IOMAP_ALLOC_MAP, ip, |
1da177e4 LT |
255 | offset, count, iomapp, &imap, flags); |
256 | } | |
257 | iomap_flags = IOMAP_NEW; | |
258 | break; | |
259 | case BMAPI_ALLOCATE: | |
260 | /* If we found an extent, return it */ | |
541d7d3c | 261 | xfs_iunlock(ip, lockmode); |
1da177e4 LT |
262 | lockmode = 0; |
263 | ||
264 | if (nimaps && !ISNULLSTARTBLOCK(imap.br_startblock)) { | |
541d7d3c | 265 | xfs_iomap_map_trace(XFS_IOMAP_WRITE_MAP, ip, |
1da177e4 LT |
266 | offset, count, iomapp, &imap, flags); |
267 | break; | |
268 | } | |
269 | ||
541d7d3c | 270 | error = xfs_iomap_write_allocate(ip, offset, count, |
24e17b5f | 271 | &imap, &nimaps); |
1da177e4 | 272 | break; |
1da177e4 LT |
273 | } |
274 | ||
275 | if (nimaps) { | |
541d7d3c | 276 | *niomaps = xfs_imap_to_bmap(ip, offset, &imap, |
1da177e4 LT |
277 | iomapp, nimaps, *niomaps, iomap_flags); |
278 | } else if (niomaps) { | |
279 | *niomaps = 0; | |
280 | } | |
281 | ||
282 | out: | |
283 | if (lockmode) | |
541d7d3c | 284 | xfs_iunlock(ip, lockmode); |
1da177e4 LT |
285 | return XFS_ERROR(error); |
286 | } | |
287 | ||
541d7d3c | 288 | |
dd9f438e NS |
289 | STATIC int |
290 | xfs_iomap_eof_align_last_fsb( | |
291 | xfs_mount_t *mp, | |
541d7d3c | 292 | xfs_inode_t *ip, |
dd9f438e NS |
293 | xfs_fsize_t isize, |
294 | xfs_extlen_t extsize, | |
295 | xfs_fileoff_t *last_fsb) | |
296 | { | |
297 | xfs_fileoff_t new_last_fsb = 0; | |
298 | xfs_extlen_t align; | |
299 | int eof, error; | |
300 | ||
71ddabb9 | 301 | if (XFS_IS_REALTIME_INODE(ip)) |
dd9f438e NS |
302 | ; |
303 | /* | |
304 | * If mounted with the "-o swalloc" option, roundup the allocation | |
305 | * request to a stripe width boundary if the file size is >= | |
306 | * stripe width and we are allocating past the allocation eof. | |
307 | */ | |
308 | else if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC) && | |
309 | (isize >= XFS_FSB_TO_B(mp, mp->m_swidth))) | |
310 | new_last_fsb = roundup_64(*last_fsb, mp->m_swidth); | |
311 | /* | |
312 | * Roundup the allocation request to a stripe unit (m_dalign) boundary | |
313 | * if the file size is >= stripe unit size, and we are allocating past | |
314 | * the allocation eof. | |
315 | */ | |
316 | else if (mp->m_dalign && (isize >= XFS_FSB_TO_B(mp, mp->m_dalign))) | |
317 | new_last_fsb = roundup_64(*last_fsb, mp->m_dalign); | |
318 | ||
319 | /* | |
320 | * Always round up the allocation request to an extent boundary | |
321 | * (when file on a real-time subvolume or has di_extsize hint). | |
322 | */ | |
323 | if (extsize) { | |
324 | if (new_last_fsb) | |
325 | align = roundup_64(new_last_fsb, extsize); | |
326 | else | |
327 | align = extsize; | |
328 | new_last_fsb = roundup_64(*last_fsb, align); | |
329 | } | |
330 | ||
331 | if (new_last_fsb) { | |
541d7d3c | 332 | error = xfs_bmap_eof(ip, new_last_fsb, XFS_DATA_FORK, &eof); |
dd9f438e NS |
333 | if (error) |
334 | return error; | |
335 | if (eof) | |
336 | *last_fsb = new_last_fsb; | |
337 | } | |
338 | return 0; | |
339 | } | |
340 | ||
1da177e4 LT |
341 | STATIC int |
342 | xfs_flush_space( | |
343 | xfs_inode_t *ip, | |
344 | int *fsynced, | |
345 | int *ioflags) | |
346 | { | |
347 | switch (*fsynced) { | |
348 | case 0: | |
349 | if (ip->i_delayed_blks) { | |
350 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
351 | xfs_flush_inode(ip); | |
352 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
353 | *fsynced = 1; | |
354 | } else { | |
355 | *ioflags |= BMAPI_SYNC; | |
356 | *fsynced = 2; | |
357 | } | |
358 | return 0; | |
359 | case 1: | |
360 | *fsynced = 2; | |
361 | *ioflags |= BMAPI_SYNC; | |
362 | return 0; | |
363 | case 2: | |
364 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
365 | xfs_flush_device(ip); | |
366 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
367 | *fsynced = 3; | |
368 | return 0; | |
369 | } | |
370 | return 1; | |
371 | } | |
372 | ||
572d95f4 NS |
373 | STATIC int |
374 | xfs_cmn_err_fsblock_zero( | |
375 | xfs_inode_t *ip, | |
376 | xfs_bmbt_irec_t *imap) | |
377 | { | |
378 | xfs_cmn_err(XFS_PTAG_FSBLOCK_ZERO, CE_ALERT, ip->i_mount, | |
379 | "Access to block zero in inode %llu " | |
380 | "start_block: %llx start_off: %llx " | |
381 | "blkcnt: %llx extent-state: %x\n", | |
382 | (unsigned long long)ip->i_ino, | |
383 | (unsigned long long)imap->br_startblock, | |
384 | (unsigned long long)imap->br_startoff, | |
385 | (unsigned long long)imap->br_blockcount, | |
386 | imap->br_state); | |
387 | return EFSCORRUPTED; | |
388 | } | |
389 | ||
1da177e4 LT |
390 | int |
391 | xfs_iomap_write_direct( | |
392 | xfs_inode_t *ip, | |
f403b7f4 | 393 | xfs_off_t offset, |
1da177e4 LT |
394 | size_t count, |
395 | int flags, | |
396 | xfs_bmbt_irec_t *ret_imap, | |
397 | int *nmaps, | |
398 | int found) | |
399 | { | |
400 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 LT |
401 | xfs_fileoff_t offset_fsb; |
402 | xfs_fileoff_t last_fsb; | |
dd9f438e | 403 | xfs_filblks_t count_fsb, resaligned; |
1da177e4 | 404 | xfs_fsblock_t firstfsb; |
dd9f438e NS |
405 | xfs_extlen_t extsz, temp; |
406 | xfs_fsize_t isize; | |
0116d935 | 407 | int nimaps; |
1da177e4 | 408 | int bmapi_flag; |
06d10dd9 | 409 | int quota_flag; |
1da177e4 LT |
410 | int rt; |
411 | xfs_trans_t *tp; | |
0116d935 | 412 | xfs_bmbt_irec_t imap; |
1da177e4 | 413 | xfs_bmap_free_t free_list; |
dd9f438e | 414 | uint qblocks, resblks, resrtextents; |
1da177e4 | 415 | int committed; |
dd9f438e | 416 | int error; |
1da177e4 LT |
417 | |
418 | /* | |
419 | * Make sure that the dquots are there. This doesn't hold | |
420 | * the ilock across a disk read. | |
421 | */ | |
422 | error = XFS_QM_DQATTACH(ip->i_mount, ip, XFS_QMOPT_ILOCKED); | |
423 | if (error) | |
424 | return XFS_ERROR(error); | |
425 | ||
dd9f438e | 426 | rt = XFS_IS_REALTIME_INODE(ip); |
957d0ebe | 427 | extsz = xfs_get_extsz_hint(ip); |
1da177e4 | 428 | |
ba87ea69 | 429 | isize = ip->i_size; |
613d7043 CH |
430 | if (ip->i_new_size > isize) |
431 | isize = ip->i_new_size; | |
1da177e4 | 432 | |
957d0ebe DC |
433 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
434 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); | |
dd9f438e | 435 | if ((offset + count) > isize) { |
541d7d3c | 436 | error = xfs_iomap_eof_align_last_fsb(mp, ip, isize, extsz, |
dd9f438e NS |
437 | &last_fsb); |
438 | if (error) | |
439 | goto error_out; | |
1da177e4 | 440 | } else { |
dd9f438e NS |
441 | if (found && (ret_imap->br_startblock == HOLESTARTBLOCK)) |
442 | last_fsb = MIN(last_fsb, (xfs_fileoff_t) | |
443 | ret_imap->br_blockcount + | |
444 | ret_imap->br_startoff); | |
1da177e4 | 445 | } |
dd9f438e NS |
446 | count_fsb = last_fsb - offset_fsb; |
447 | ASSERT(count_fsb > 0); | |
448 | ||
449 | resaligned = count_fsb; | |
450 | if (unlikely(extsz)) { | |
451 | if ((temp = do_mod(offset_fsb, extsz))) | |
452 | resaligned += temp; | |
453 | if ((temp = do_mod(resaligned, extsz))) | |
454 | resaligned += extsz - temp; | |
455 | } | |
456 | ||
457 | if (unlikely(rt)) { | |
458 | resrtextents = qblocks = resaligned; | |
459 | resrtextents /= mp->m_sb.sb_rextsize; | |
84e1e99f DC |
460 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
461 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
462 | } else { | |
463 | resrtextents = 0; | |
dd9f438e | 464 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resaligned); |
84e1e99f DC |
465 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
466 | } | |
1da177e4 LT |
467 | |
468 | /* | |
06d10dd9 | 469 | * Allocate and setup the transaction |
1da177e4 LT |
470 | */ |
471 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
472 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
1da177e4 | 473 | error = xfs_trans_reserve(tp, resblks, |
d52b44d0 | 474 | XFS_WRITE_LOG_RES(mp), resrtextents, |
1da177e4 LT |
475 | XFS_TRANS_PERM_LOG_RES, |
476 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 477 | /* |
06d10dd9 | 478 | * Check for running out of space, note: need lock to return |
1da177e4 LT |
479 | */ |
480 | if (error) | |
1da177e4 | 481 | xfs_trans_cancel(tp, 0); |
1da177e4 | 482 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
1da177e4 | 483 | if (error) |
06d10dd9 | 484 | goto error_out; |
1da177e4 | 485 | |
dd9f438e NS |
486 | error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, |
487 | qblocks, 0, quota_flag); | |
488 | if (error) | |
1da177e4 | 489 | goto error1; |
1da177e4 | 490 | |
1da177e4 LT |
491 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
492 | xfs_trans_ihold(tp, ip); | |
493 | ||
dd9f438e | 494 | bmapi_flag = XFS_BMAPI_WRITE; |
ba87ea69 | 495 | if ((flags & BMAPI_DIRECT) && (offset < ip->i_size || extsz)) |
1da177e4 LT |
496 | bmapi_flag |= XFS_BMAPI_PREALLOC; |
497 | ||
498 | /* | |
dd9f438e | 499 | * Issue the xfs_bmapi() call to allocate the blocks |
1da177e4 LT |
500 | */ |
501 | XFS_BMAP_INIT(&free_list, &firstfsb); | |
06d10dd9 | 502 | nimaps = 1; |
541d7d3c | 503 | error = xfs_bmapi(tp, ip, offset_fsb, count_fsb, bmapi_flag, |
3e57ecf6 | 504 | &firstfsb, 0, &imap, &nimaps, &free_list, NULL); |
06d10dd9 | 505 | if (error) |
1da177e4 | 506 | goto error0; |
1da177e4 LT |
507 | |
508 | /* | |
06d10dd9 | 509 | * Complete the transaction |
1da177e4 | 510 | */ |
f7c99b6f | 511 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
06d10dd9 | 512 | if (error) |
1da177e4 | 513 | goto error0; |
1c72bf90 | 514 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
06d10dd9 | 515 | if (error) |
1da177e4 | 516 | goto error_out; |
1da177e4 | 517 | |
06d10dd9 NS |
518 | /* |
519 | * Copy any maps to caller's array and return any error. | |
520 | */ | |
1da177e4 | 521 | if (nimaps == 0) { |
572d95f4 NS |
522 | error = ENOSPC; |
523 | goto error_out; | |
524 | } | |
525 | ||
613d7043 | 526 | if (unlikely(!imap.br_startblock && |
71ddabb9 | 527 | !(XFS_IS_REALTIME_INODE(ip)))) { |
572d95f4 | 528 | error = xfs_cmn_err_fsblock_zero(ip, &imap); |
1da177e4 LT |
529 | goto error_out; |
530 | } | |
531 | ||
0116d935 | 532 | *ret_imap = imap; |
1da177e4 | 533 | *nmaps = 1; |
1da177e4 LT |
534 | return 0; |
535 | ||
06d10dd9 | 536 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 537 | xfs_bmap_cancel(&free_list); |
06d10dd9 | 538 | XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, qblocks, 0, quota_flag); |
1da177e4 | 539 | |
06d10dd9 | 540 | error1: /* Just cancel transaction */ |
1da177e4 LT |
541 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
542 | *nmaps = 0; /* nothing set-up here */ | |
543 | ||
544 | error_out: | |
545 | return XFS_ERROR(error); | |
546 | } | |
547 | ||
dd9f438e NS |
548 | /* |
549 | * If the caller is doing a write at the end of the file, | |
550 | * then extend the allocation out to the file system's write | |
551 | * iosize. We clean up any extra space left over when the | |
552 | * file is closed in xfs_inactive(). | |
553 | * | |
554 | * For sync writes, we are flushing delayed allocate space to | |
555 | * try to make additional space available for allocation near | |
556 | * the filesystem full boundary - preallocation hurts in that | |
557 | * situation, of course. | |
558 | */ | |
559 | STATIC int | |
560 | xfs_iomap_eof_want_preallocate( | |
561 | xfs_mount_t *mp, | |
541d7d3c | 562 | xfs_inode_t *ip, |
dd9f438e NS |
563 | xfs_fsize_t isize, |
564 | xfs_off_t offset, | |
565 | size_t count, | |
566 | int ioflag, | |
567 | xfs_bmbt_irec_t *imap, | |
568 | int nimaps, | |
569 | int *prealloc) | |
570 | { | |
571 | xfs_fileoff_t start_fsb; | |
572 | xfs_filblks_t count_fsb; | |
573 | xfs_fsblock_t firstblock; | |
574 | int n, error, imaps; | |
575 | ||
576 | *prealloc = 0; | |
577 | if ((ioflag & BMAPI_SYNC) || (offset + count) <= isize) | |
578 | return 0; | |
579 | ||
580 | /* | |
581 | * If there are any real blocks past eof, then don't | |
582 | * do any speculative allocation. | |
583 | */ | |
584 | start_fsb = XFS_B_TO_FSBT(mp, ((xfs_ufsize_t)(offset + count - 1))); | |
585 | count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); | |
586 | while (count_fsb > 0) { | |
587 | imaps = nimaps; | |
3ddb8fa9 | 588 | firstblock = NULLFSBLOCK; |
541d7d3c | 589 | error = xfs_bmapi(NULL, ip, start_fsb, count_fsb, 0, |
3e57ecf6 | 590 | &firstblock, 0, imap, &imaps, NULL, NULL); |
dd9f438e NS |
591 | if (error) |
592 | return error; | |
593 | for (n = 0; n < imaps; n++) { | |
594 | if ((imap[n].br_startblock != HOLESTARTBLOCK) && | |
595 | (imap[n].br_startblock != DELAYSTARTBLOCK)) | |
596 | return 0; | |
597 | start_fsb += imap[n].br_blockcount; | |
598 | count_fsb -= imap[n].br_blockcount; | |
599 | } | |
600 | } | |
601 | *prealloc = 1; | |
602 | return 0; | |
603 | } | |
604 | ||
1da177e4 LT |
605 | int |
606 | xfs_iomap_write_delay( | |
607 | xfs_inode_t *ip, | |
f403b7f4 | 608 | xfs_off_t offset, |
1da177e4 LT |
609 | size_t count, |
610 | int ioflag, | |
611 | xfs_bmbt_irec_t *ret_imap, | |
612 | int *nmaps) | |
613 | { | |
614 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 LT |
615 | xfs_fileoff_t offset_fsb; |
616 | xfs_fileoff_t last_fsb; | |
dd9f438e NS |
617 | xfs_off_t aligned_offset; |
618 | xfs_fileoff_t ioalign; | |
1da177e4 | 619 | xfs_fsblock_t firstblock; |
dd9f438e NS |
620 | xfs_extlen_t extsz; |
621 | xfs_fsize_t isize; | |
1da177e4 | 622 | int nimaps; |
1da177e4 | 623 | xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS]; |
dd9f438e NS |
624 | int prealloc, fsynced = 0; |
625 | int error; | |
1da177e4 LT |
626 | |
627 | ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE) != 0); | |
628 | ||
629 | /* | |
630 | * Make sure that the dquots are there. This doesn't hold | |
631 | * the ilock across a disk read. | |
632 | */ | |
1da177e4 LT |
633 | error = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED); |
634 | if (error) | |
635 | return XFS_ERROR(error); | |
636 | ||
957d0ebe | 637 | extsz = xfs_get_extsz_hint(ip); |
dd9f438e NS |
638 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
639 | ||
1da177e4 | 640 | retry: |
ba87ea69 | 641 | isize = ip->i_size; |
613d7043 CH |
642 | if (ip->i_new_size > isize) |
643 | isize = ip->i_new_size; | |
1da177e4 | 644 | |
541d7d3c | 645 | error = xfs_iomap_eof_want_preallocate(mp, ip, isize, offset, count, |
dd9f438e NS |
646 | ioflag, imap, XFS_WRITE_IMAPS, &prealloc); |
647 | if (error) | |
648 | return error; | |
1da177e4 | 649 | |
dd9f438e | 650 | if (prealloc) { |
1da177e4 LT |
651 | aligned_offset = XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); |
652 | ioalign = XFS_B_TO_FSBT(mp, aligned_offset); | |
dd9f438e NS |
653 | last_fsb = ioalign + mp->m_writeio_blocks; |
654 | } else { | |
655 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); | |
1da177e4 | 656 | } |
1da177e4 | 657 | |
dd9f438e | 658 | if (prealloc || extsz) { |
541d7d3c | 659 | error = xfs_iomap_eof_align_last_fsb(mp, ip, isize, extsz, |
dd9f438e NS |
660 | &last_fsb); |
661 | if (error) | |
1da177e4 | 662 | return error; |
1da177e4 | 663 | } |
dd9f438e NS |
664 | |
665 | nimaps = XFS_WRITE_IMAPS; | |
666 | firstblock = NULLFSBLOCK; | |
541d7d3c | 667 | error = xfs_bmapi(NULL, ip, offset_fsb, |
1da177e4 LT |
668 | (xfs_filblks_t)(last_fsb - offset_fsb), |
669 | XFS_BMAPI_DELAY | XFS_BMAPI_WRITE | | |
670 | XFS_BMAPI_ENTIRE, &firstblock, 1, imap, | |
3e57ecf6 | 671 | &nimaps, NULL, NULL); |
dd9f438e | 672 | if (error && (error != ENOSPC)) |
1da177e4 | 673 | return XFS_ERROR(error); |
dd9f438e | 674 | |
1da177e4 LT |
675 | /* |
676 | * If bmapi returned us nothing, and if we didn't get back EDQUOT, | |
dd9f438e | 677 | * then we must have run out of space - flush delalloc, and retry.. |
1da177e4 LT |
678 | */ |
679 | if (nimaps == 0) { | |
680 | xfs_iomap_enter_trace(XFS_IOMAP_WRITE_NOSPACE, | |
541d7d3c | 681 | ip, offset, count); |
1da177e4 LT |
682 | if (xfs_flush_space(ip, &fsynced, &ioflag)) |
683 | return XFS_ERROR(ENOSPC); | |
684 | ||
685 | error = 0; | |
686 | goto retry; | |
687 | } | |
688 | ||
613d7043 | 689 | if (unlikely(!imap[0].br_startblock && |
71ddabb9 | 690 | !(XFS_IS_REALTIME_INODE(ip)))) |
572d95f4 | 691 | return xfs_cmn_err_fsblock_zero(ip, &imap[0]); |
dd9f438e NS |
692 | |
693 | *ret_imap = imap[0]; | |
694 | *nmaps = 1; | |
695 | ||
1da177e4 LT |
696 | return 0; |
697 | } | |
698 | ||
699 | /* | |
700 | * Pass in a delayed allocate extent, convert it to real extents; | |
701 | * return to the caller the extent we create which maps on top of | |
702 | * the originating callers request. | |
703 | * | |
704 | * Called without a lock on the inode. | |
e4143a1c DC |
705 | * |
706 | * We no longer bother to look at the incoming map - all we have to | |
707 | * guarantee is that whatever we allocate fills the required range. | |
1da177e4 LT |
708 | */ |
709 | int | |
710 | xfs_iomap_write_allocate( | |
711 | xfs_inode_t *ip, | |
f403b7f4 | 712 | xfs_off_t offset, |
24e17b5f | 713 | size_t count, |
1da177e4 LT |
714 | xfs_bmbt_irec_t *map, |
715 | int *retmap) | |
716 | { | |
717 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 LT |
718 | xfs_fileoff_t offset_fsb, last_block; |
719 | xfs_fileoff_t end_fsb, map_start_fsb; | |
720 | xfs_fsblock_t first_block; | |
721 | xfs_bmap_free_t free_list; | |
722 | xfs_filblks_t count_fsb; | |
e4143a1c | 723 | xfs_bmbt_irec_t imap; |
1da177e4 | 724 | xfs_trans_t *tp; |
e4143a1c | 725 | int nimaps, committed; |
1da177e4 LT |
726 | int error = 0; |
727 | int nres; | |
728 | ||
729 | *retmap = 0; | |
730 | ||
731 | /* | |
732 | * Make sure that the dquots are there. | |
733 | */ | |
734 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) | |
735 | return XFS_ERROR(error); | |
736 | ||
24e17b5f | 737 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
1da177e4 | 738 | count_fsb = map->br_blockcount; |
24e17b5f | 739 | map_start_fsb = map->br_startoff; |
1da177e4 LT |
740 | |
741 | XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb)); | |
742 | ||
743 | while (count_fsb != 0) { | |
744 | /* | |
745 | * Set up a transaction with which to allocate the | |
746 | * backing store for the file. Do allocations in a | |
747 | * loop until we get some space in the range we are | |
748 | * interested in. The other space that might be allocated | |
749 | * is in the delayed allocation extent on which we sit | |
750 | * but before our buffer starts. | |
751 | */ | |
752 | ||
753 | nimaps = 0; | |
754 | while (nimaps == 0) { | |
755 | tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE); | |
84e1e99f | 756 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
757 | nres = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK); |
758 | error = xfs_trans_reserve(tp, nres, | |
759 | XFS_WRITE_LOG_RES(mp), | |
760 | 0, XFS_TRANS_PERM_LOG_RES, | |
761 | XFS_WRITE_LOG_COUNT); | |
1da177e4 LT |
762 | if (error) { |
763 | xfs_trans_cancel(tp, 0); | |
764 | return XFS_ERROR(error); | |
765 | } | |
766 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
767 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
768 | xfs_trans_ihold(tp, ip); | |
769 | ||
770 | XFS_BMAP_INIT(&free_list, &first_block); | |
771 | ||
1da177e4 | 772 | /* |
e4143a1c DC |
773 | * it is possible that the extents have changed since |
774 | * we did the read call as we dropped the ilock for a | |
775 | * while. We have to be careful about truncates or hole | |
776 | * punchs here - we are not allowed to allocate | |
777 | * non-delalloc blocks here. | |
778 | * | |
779 | * The only protection against truncation is the pages | |
780 | * for the range we are being asked to convert are | |
781 | * locked and hence a truncate will block on them | |
782 | * first. | |
783 | * | |
784 | * As a result, if we go beyond the range we really | |
785 | * need and hit an delalloc extent boundary followed by | |
786 | * a hole while we have excess blocks in the map, we | |
787 | * will fill the hole incorrectly and overrun the | |
788 | * transaction reservation. | |
789 | * | |
790 | * Using a single map prevents this as we are forced to | |
791 | * check each map we look for overlap with the desired | |
792 | * range and abort as soon as we find it. Also, given | |
793 | * that we only return a single map, having one beyond | |
794 | * what we can return is probably a bit silly. | |
795 | * | |
796 | * We also need to check that we don't go beyond EOF; | |
797 | * this is a truncate optimisation as a truncate sets | |
798 | * the new file size before block on the pages we | |
799 | * currently have locked under writeback. Because they | |
800 | * are about to be tossed, we don't need to write them | |
801 | * back.... | |
1da177e4 | 802 | */ |
e4143a1c | 803 | nimaps = 1; |
ba87ea69 | 804 | end_fsb = XFS_B_TO_FSB(mp, ip->i_size); |
1da177e4 LT |
805 | xfs_bmap_last_offset(NULL, ip, &last_block, |
806 | XFS_DATA_FORK); | |
807 | last_block = XFS_FILEOFF_MAX(last_block, end_fsb); | |
808 | if ((map_start_fsb + count_fsb) > last_block) { | |
809 | count_fsb = last_block - map_start_fsb; | |
810 | if (count_fsb == 0) { | |
811 | error = EAGAIN; | |
812 | goto trans_cancel; | |
813 | } | |
814 | } | |
815 | ||
816 | /* Go get the actual blocks */ | |
541d7d3c | 817 | error = xfs_bmapi(tp, ip, map_start_fsb, count_fsb, |
1da177e4 | 818 | XFS_BMAPI_WRITE, &first_block, 1, |
e4143a1c | 819 | &imap, &nimaps, &free_list, NULL); |
1da177e4 LT |
820 | if (error) |
821 | goto trans_cancel; | |
822 | ||
f7c99b6f | 823 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
824 | if (error) |
825 | goto trans_cancel; | |
826 | ||
1c72bf90 | 827 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
828 | if (error) |
829 | goto error0; | |
830 | ||
831 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
832 | } | |
833 | ||
834 | /* | |
835 | * See if we were able to allocate an extent that | |
836 | * covers at least part of the callers request | |
837 | */ | |
e4143a1c DC |
838 | if (unlikely(!imap.br_startblock && |
839 | XFS_IS_REALTIME_INODE(ip))) | |
840 | return xfs_cmn_err_fsblock_zero(ip, &imap); | |
841 | if ((offset_fsb >= imap.br_startoff) && | |
842 | (offset_fsb < (imap.br_startoff + | |
843 | imap.br_blockcount))) { | |
844 | *map = imap; | |
845 | *retmap = 1; | |
846 | XFS_STATS_INC(xs_xstrat_quick); | |
847 | return 0; | |
1da177e4 LT |
848 | } |
849 | ||
e4143a1c DC |
850 | /* |
851 | * So far we have not mapped the requested part of the | |
1da177e4 LT |
852 | * file, just surrounding data, try again. |
853 | */ | |
e4143a1c DC |
854 | count_fsb -= imap.br_blockcount; |
855 | map_start_fsb = imap.br_startoff + imap.br_blockcount; | |
1da177e4 LT |
856 | } |
857 | ||
858 | trans_cancel: | |
859 | xfs_bmap_cancel(&free_list); | |
860 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
861 | error0: | |
862 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
863 | return XFS_ERROR(error); | |
864 | } | |
865 | ||
866 | int | |
867 | xfs_iomap_write_unwritten( | |
868 | xfs_inode_t *ip, | |
f403b7f4 | 869 | xfs_off_t offset, |
1da177e4 LT |
870 | size_t count) |
871 | { | |
872 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 LT |
873 | xfs_fileoff_t offset_fsb; |
874 | xfs_filblks_t count_fsb; | |
875 | xfs_filblks_t numblks_fsb; | |
dd9f438e NS |
876 | xfs_fsblock_t firstfsb; |
877 | int nimaps; | |
878 | xfs_trans_t *tp; | |
879 | xfs_bmbt_irec_t imap; | |
880 | xfs_bmap_free_t free_list; | |
881 | uint resblks; | |
1da177e4 LT |
882 | int committed; |
883 | int error; | |
1da177e4 | 884 | |
541d7d3c | 885 | xfs_iomap_enter_trace(XFS_IOMAP_UNWRITTEN, ip, offset, count); |
1da177e4 LT |
886 | |
887 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
888 | count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); | |
889 | count_fsb = (xfs_filblks_t)(count_fsb - offset_fsb); | |
890 | ||
dd9f438e | 891 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0) << 1; |
1da177e4 | 892 | |
dd9f438e | 893 | do { |
1da177e4 LT |
894 | /* |
895 | * set up a transaction to convert the range of extents | |
896 | * from unwritten to real. Do allocations in a loop until | |
897 | * we have covered the range passed in. | |
898 | */ | |
1da177e4 | 899 | tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE); |
84e1e99f | 900 | tp->t_flags |= XFS_TRANS_RESERVE; |
dd9f438e | 901 | error = xfs_trans_reserve(tp, resblks, |
1da177e4 LT |
902 | XFS_WRITE_LOG_RES(mp), 0, |
903 | XFS_TRANS_PERM_LOG_RES, | |
904 | XFS_WRITE_LOG_COUNT); | |
905 | if (error) { | |
906 | xfs_trans_cancel(tp, 0); | |
572d95f4 | 907 | return XFS_ERROR(error); |
1da177e4 LT |
908 | } |
909 | ||
910 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
911 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
912 | xfs_trans_ihold(tp, ip); | |
913 | ||
914 | /* | |
915 | * Modify the unwritten extent state of the buffer. | |
916 | */ | |
917 | XFS_BMAP_INIT(&free_list, &firstfsb); | |
918 | nimaps = 1; | |
541d7d3c | 919 | error = xfs_bmapi(tp, ip, offset_fsb, count_fsb, |
dd9f438e | 920 | XFS_BMAPI_WRITE|XFS_BMAPI_CONVERT, &firstfsb, |
3e57ecf6 | 921 | 1, &imap, &nimaps, &free_list, NULL); |
1da177e4 LT |
922 | if (error) |
923 | goto error_on_bmapi_transaction; | |
924 | ||
f7c99b6f | 925 | error = xfs_bmap_finish(&(tp), &(free_list), &committed); |
1da177e4 LT |
926 | if (error) |
927 | goto error_on_bmapi_transaction; | |
928 | ||
1c72bf90 | 929 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
930 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
931 | if (error) | |
572d95f4 NS |
932 | return XFS_ERROR(error); |
933 | ||
934 | if (unlikely(!imap.br_startblock && | |
71ddabb9 | 935 | !(XFS_IS_REALTIME_INODE(ip)))) |
572d95f4 | 936 | return xfs_cmn_err_fsblock_zero(ip, &imap); |
1da177e4 LT |
937 | |
938 | if ((numblks_fsb = imap.br_blockcount) == 0) { | |
939 | /* | |
940 | * The numblks_fsb value should always get | |
941 | * smaller, otherwise the loop is stuck. | |
942 | */ | |
943 | ASSERT(imap.br_blockcount); | |
944 | break; | |
945 | } | |
946 | offset_fsb += numblks_fsb; | |
947 | count_fsb -= numblks_fsb; | |
948 | } while (count_fsb > 0); | |
949 | ||
950 | return 0; | |
951 | ||
952 | error_on_bmapi_transaction: | |
953 | xfs_bmap_cancel(&free_list); | |
954 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT)); | |
955 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1da177e4 LT |
956 | return XFS_ERROR(error); |
957 | } |