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1da177e4 | 1 | /* |
3e57ecf6 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
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 { | |
9d87c319 | 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); |
579aa9ca | 199 | lockmode = XFS_ILOCK_EXCL; |
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); |
579aa9ca | 206 | lockmode = XFS_ILOCK_SHARED; |
1da177e4 | 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 | ||
9d87c319 | 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_extlen_t extsize, |
294 | xfs_fileoff_t *last_fsb) | |
295 | { | |
296 | xfs_fileoff_t new_last_fsb = 0; | |
297 | xfs_extlen_t align; | |
298 | int eof, error; | |
299 | ||
71ddabb9 | 300 | if (XFS_IS_REALTIME_INODE(ip)) |
dd9f438e NS |
301 | ; |
302 | /* | |
303 | * If mounted with the "-o swalloc" option, roundup the allocation | |
304 | * request to a stripe width boundary if the file size is >= | |
305 | * stripe width and we are allocating past the allocation eof. | |
306 | */ | |
307 | else if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC) && | |
9f6c92b9 | 308 | (ip->i_size >= XFS_FSB_TO_B(mp, mp->m_swidth))) |
dd9f438e NS |
309 | new_last_fsb = roundup_64(*last_fsb, mp->m_swidth); |
310 | /* | |
311 | * Roundup the allocation request to a stripe unit (m_dalign) boundary | |
312 | * if the file size is >= stripe unit size, and we are allocating past | |
313 | * the allocation eof. | |
314 | */ | |
9f6c92b9 | 315 | else if (mp->m_dalign && (ip->i_size >= XFS_FSB_TO_B(mp, mp->m_dalign))) |
dd9f438e NS |
316 | new_last_fsb = roundup_64(*last_fsb, mp->m_dalign); |
317 | ||
318 | /* | |
319 | * Always round up the allocation request to an extent boundary | |
320 | * (when file on a real-time subvolume or has di_extsize hint). | |
321 | */ | |
322 | if (extsize) { | |
323 | if (new_last_fsb) | |
324 | align = roundup_64(new_last_fsb, extsize); | |
325 | else | |
326 | align = extsize; | |
327 | new_last_fsb = roundup_64(*last_fsb, align); | |
328 | } | |
329 | ||
330 | if (new_last_fsb) { | |
541d7d3c | 331 | error = xfs_bmap_eof(ip, new_last_fsb, XFS_DATA_FORK, &eof); |
dd9f438e NS |
332 | if (error) |
333 | return error; | |
334 | if (eof) | |
335 | *last_fsb = new_last_fsb; | |
336 | } | |
337 | return 0; | |
338 | } | |
339 | ||
1da177e4 LT |
340 | STATIC int |
341 | xfs_flush_space( | |
342 | xfs_inode_t *ip, | |
343 | int *fsynced, | |
344 | int *ioflags) | |
345 | { | |
346 | switch (*fsynced) { | |
347 | case 0: | |
348 | if (ip->i_delayed_blks) { | |
349 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
5825294e | 350 | delay(1); |
1da177e4 LT |
351 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
352 | *fsynced = 1; | |
353 | } else { | |
354 | *ioflags |= BMAPI_SYNC; | |
355 | *fsynced = 2; | |
356 | } | |
357 | return 0; | |
358 | case 1: | |
359 | *fsynced = 2; | |
360 | *ioflags |= BMAPI_SYNC; | |
361 | return 0; | |
362 | case 2: | |
363 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
a8d770d9 | 364 | xfs_flush_inodes(ip); |
1da177e4 LT |
365 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
366 | *fsynced = 3; | |
367 | return 0; | |
368 | } | |
369 | return 1; | |
370 | } | |
371 | ||
572d95f4 NS |
372 | STATIC int |
373 | xfs_cmn_err_fsblock_zero( | |
374 | xfs_inode_t *ip, | |
375 | xfs_bmbt_irec_t *imap) | |
376 | { | |
377 | xfs_cmn_err(XFS_PTAG_FSBLOCK_ZERO, CE_ALERT, ip->i_mount, | |
378 | "Access to block zero in inode %llu " | |
379 | "start_block: %llx start_off: %llx " | |
380 | "blkcnt: %llx extent-state: %x\n", | |
381 | (unsigned long long)ip->i_ino, | |
382 | (unsigned long long)imap->br_startblock, | |
383 | (unsigned long long)imap->br_startoff, | |
384 | (unsigned long long)imap->br_blockcount, | |
385 | imap->br_state); | |
386 | return EFSCORRUPTED; | |
387 | } | |
388 | ||
1da177e4 LT |
389 | int |
390 | xfs_iomap_write_direct( | |
391 | xfs_inode_t *ip, | |
f403b7f4 | 392 | xfs_off_t offset, |
1da177e4 LT |
393 | size_t count, |
394 | int flags, | |
395 | xfs_bmbt_irec_t *ret_imap, | |
396 | int *nmaps, | |
397 | int found) | |
398 | { | |
399 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 LT |
400 | xfs_fileoff_t offset_fsb; |
401 | xfs_fileoff_t last_fsb; | |
dd9f438e | 402 | xfs_filblks_t count_fsb, resaligned; |
1da177e4 | 403 | xfs_fsblock_t firstfsb; |
dd9f438e | 404 | xfs_extlen_t extsz, temp; |
0116d935 | 405 | int nimaps; |
1da177e4 | 406 | int bmapi_flag; |
06d10dd9 | 407 | int quota_flag; |
1da177e4 LT |
408 | int rt; |
409 | xfs_trans_t *tp; | |
0116d935 | 410 | xfs_bmbt_irec_t imap; |
1da177e4 | 411 | xfs_bmap_free_t free_list; |
dd9f438e | 412 | uint qblocks, resblks, resrtextents; |
1da177e4 | 413 | int committed; |
dd9f438e | 414 | int error; |
1da177e4 LT |
415 | |
416 | /* | |
417 | * Make sure that the dquots are there. This doesn't hold | |
418 | * the ilock across a disk read. | |
419 | */ | |
420 | error = XFS_QM_DQATTACH(ip->i_mount, ip, XFS_QMOPT_ILOCKED); | |
421 | if (error) | |
422 | return XFS_ERROR(error); | |
423 | ||
dd9f438e | 424 | rt = XFS_IS_REALTIME_INODE(ip); |
957d0ebe | 425 | extsz = xfs_get_extsz_hint(ip); |
1da177e4 | 426 | |
957d0ebe DC |
427 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
428 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); | |
9f6c92b9 LM |
429 | if ((offset + count) > ip->i_size) { |
430 | error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb); | |
dd9f438e NS |
431 | if (error) |
432 | goto error_out; | |
1da177e4 | 433 | } else { |
dd9f438e NS |
434 | if (found && (ret_imap->br_startblock == HOLESTARTBLOCK)) |
435 | last_fsb = MIN(last_fsb, (xfs_fileoff_t) | |
436 | ret_imap->br_blockcount + | |
437 | ret_imap->br_startoff); | |
1da177e4 | 438 | } |
dd9f438e NS |
439 | count_fsb = last_fsb - offset_fsb; |
440 | ASSERT(count_fsb > 0); | |
441 | ||
442 | resaligned = count_fsb; | |
443 | if (unlikely(extsz)) { | |
444 | if ((temp = do_mod(offset_fsb, extsz))) | |
445 | resaligned += temp; | |
446 | if ((temp = do_mod(resaligned, extsz))) | |
447 | resaligned += extsz - temp; | |
448 | } | |
449 | ||
450 | if (unlikely(rt)) { | |
451 | resrtextents = qblocks = resaligned; | |
452 | resrtextents /= mp->m_sb.sb_rextsize; | |
84e1e99f DC |
453 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
454 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
455 | } else { | |
456 | resrtextents = 0; | |
dd9f438e | 457 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resaligned); |
84e1e99f DC |
458 | quota_flag = XFS_QMOPT_RES_REGBLKS; |
459 | } | |
1da177e4 LT |
460 | |
461 | /* | |
06d10dd9 | 462 | * Allocate and setup the transaction |
1da177e4 LT |
463 | */ |
464 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
465 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
1da177e4 | 466 | error = xfs_trans_reserve(tp, resblks, |
d52b44d0 | 467 | XFS_WRITE_LOG_RES(mp), resrtextents, |
1da177e4 LT |
468 | XFS_TRANS_PERM_LOG_RES, |
469 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 470 | /* |
06d10dd9 | 471 | * Check for running out of space, note: need lock to return |
1da177e4 LT |
472 | */ |
473 | if (error) | |
1da177e4 | 474 | xfs_trans_cancel(tp, 0); |
1da177e4 | 475 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
1da177e4 | 476 | if (error) |
06d10dd9 | 477 | goto error_out; |
1da177e4 | 478 | |
dd9f438e NS |
479 | error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, |
480 | qblocks, 0, quota_flag); | |
481 | if (error) | |
1da177e4 | 482 | goto error1; |
1da177e4 | 483 | |
1da177e4 LT |
484 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
485 | xfs_trans_ihold(tp, ip); | |
486 | ||
dd9f438e | 487 | bmapi_flag = XFS_BMAPI_WRITE; |
ba87ea69 | 488 | if ((flags & BMAPI_DIRECT) && (offset < ip->i_size || extsz)) |
1da177e4 LT |
489 | bmapi_flag |= XFS_BMAPI_PREALLOC; |
490 | ||
491 | /* | |
dd9f438e | 492 | * Issue the xfs_bmapi() call to allocate the blocks |
1da177e4 | 493 | */ |
9d87c319 | 494 | xfs_bmap_init(&free_list, &firstfsb); |
06d10dd9 | 495 | nimaps = 1; |
541d7d3c | 496 | error = xfs_bmapi(tp, ip, offset_fsb, count_fsb, bmapi_flag, |
3e57ecf6 | 497 | &firstfsb, 0, &imap, &nimaps, &free_list, NULL); |
06d10dd9 | 498 | if (error) |
1da177e4 | 499 | goto error0; |
1da177e4 LT |
500 | |
501 | /* | |
06d10dd9 | 502 | * Complete the transaction |
1da177e4 | 503 | */ |
f7c99b6f | 504 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
06d10dd9 | 505 | if (error) |
1da177e4 | 506 | goto error0; |
1c72bf90 | 507 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
06d10dd9 | 508 | if (error) |
1da177e4 | 509 | goto error_out; |
1da177e4 | 510 | |
06d10dd9 NS |
511 | /* |
512 | * Copy any maps to caller's array and return any error. | |
513 | */ | |
1da177e4 | 514 | if (nimaps == 0) { |
572d95f4 NS |
515 | error = ENOSPC; |
516 | goto error_out; | |
517 | } | |
518 | ||
86c4d623 | 519 | if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) { |
572d95f4 | 520 | error = xfs_cmn_err_fsblock_zero(ip, &imap); |
1da177e4 LT |
521 | goto error_out; |
522 | } | |
523 | ||
0116d935 | 524 | *ret_imap = imap; |
1da177e4 | 525 | *nmaps = 1; |
1da177e4 LT |
526 | return 0; |
527 | ||
06d10dd9 | 528 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 529 | xfs_bmap_cancel(&free_list); |
06d10dd9 | 530 | XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, qblocks, 0, quota_flag); |
1da177e4 | 531 | |
06d10dd9 | 532 | error1: /* Just cancel transaction */ |
1da177e4 LT |
533 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
534 | *nmaps = 0; /* nothing set-up here */ | |
535 | ||
536 | error_out: | |
537 | return XFS_ERROR(error); | |
538 | } | |
539 | ||
dd9f438e NS |
540 | /* |
541 | * If the caller is doing a write at the end of the file, | |
542 | * then extend the allocation out to the file system's write | |
543 | * iosize. We clean up any extra space left over when the | |
544 | * file is closed in xfs_inactive(). | |
545 | * | |
546 | * For sync writes, we are flushing delayed allocate space to | |
547 | * try to make additional space available for allocation near | |
548 | * the filesystem full boundary - preallocation hurts in that | |
549 | * situation, of course. | |
550 | */ | |
551 | STATIC int | |
552 | xfs_iomap_eof_want_preallocate( | |
553 | xfs_mount_t *mp, | |
541d7d3c | 554 | xfs_inode_t *ip, |
dd9f438e NS |
555 | xfs_off_t offset, |
556 | size_t count, | |
557 | int ioflag, | |
558 | xfs_bmbt_irec_t *imap, | |
559 | int nimaps, | |
560 | int *prealloc) | |
561 | { | |
562 | xfs_fileoff_t start_fsb; | |
563 | xfs_filblks_t count_fsb; | |
564 | xfs_fsblock_t firstblock; | |
565 | int n, error, imaps; | |
566 | ||
567 | *prealloc = 0; | |
9f6c92b9 | 568 | if ((ioflag & BMAPI_SYNC) || (offset + count) <= ip->i_size) |
dd9f438e NS |
569 | return 0; |
570 | ||
571 | /* | |
572 | * If there are any real blocks past eof, then don't | |
573 | * do any speculative allocation. | |
574 | */ | |
575 | start_fsb = XFS_B_TO_FSBT(mp, ((xfs_ufsize_t)(offset + count - 1))); | |
576 | count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); | |
577 | while (count_fsb > 0) { | |
578 | imaps = nimaps; | |
3ddb8fa9 | 579 | firstblock = NULLFSBLOCK; |
541d7d3c | 580 | error = xfs_bmapi(NULL, ip, start_fsb, count_fsb, 0, |
3e57ecf6 | 581 | &firstblock, 0, imap, &imaps, NULL, NULL); |
dd9f438e NS |
582 | if (error) |
583 | return error; | |
584 | for (n = 0; n < imaps; n++) { | |
585 | if ((imap[n].br_startblock != HOLESTARTBLOCK) && | |
586 | (imap[n].br_startblock != DELAYSTARTBLOCK)) | |
587 | return 0; | |
588 | start_fsb += imap[n].br_blockcount; | |
589 | count_fsb -= imap[n].br_blockcount; | |
590 | } | |
591 | } | |
592 | *prealloc = 1; | |
593 | return 0; | |
594 | } | |
595 | ||
1da177e4 LT |
596 | int |
597 | xfs_iomap_write_delay( | |
598 | xfs_inode_t *ip, | |
f403b7f4 | 599 | xfs_off_t offset, |
1da177e4 LT |
600 | size_t count, |
601 | int ioflag, | |
602 | xfs_bmbt_irec_t *ret_imap, | |
603 | int *nmaps) | |
604 | { | |
605 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 LT |
606 | xfs_fileoff_t offset_fsb; |
607 | xfs_fileoff_t last_fsb; | |
dd9f438e NS |
608 | xfs_off_t aligned_offset; |
609 | xfs_fileoff_t ioalign; | |
1da177e4 | 610 | xfs_fsblock_t firstblock; |
dd9f438e | 611 | xfs_extlen_t extsz; |
1da177e4 | 612 | int nimaps; |
1da177e4 | 613 | xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS]; |
dd9f438e NS |
614 | int prealloc, fsynced = 0; |
615 | int error; | |
1da177e4 | 616 | |
579aa9ca | 617 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
1da177e4 LT |
618 | |
619 | /* | |
620 | * Make sure that the dquots are there. This doesn't hold | |
621 | * the ilock across a disk read. | |
622 | */ | |
1da177e4 LT |
623 | error = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED); |
624 | if (error) | |
625 | return XFS_ERROR(error); | |
626 | ||
957d0ebe | 627 | extsz = xfs_get_extsz_hint(ip); |
dd9f438e NS |
628 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
629 | ||
1da177e4 | 630 | retry: |
9f6c92b9 | 631 | error = xfs_iomap_eof_want_preallocate(mp, ip, offset, count, |
dd9f438e NS |
632 | ioflag, imap, XFS_WRITE_IMAPS, &prealloc); |
633 | if (error) | |
634 | return error; | |
1da177e4 | 635 | |
dd9f438e | 636 | if (prealloc) { |
1da177e4 LT |
637 | aligned_offset = XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); |
638 | ioalign = XFS_B_TO_FSBT(mp, aligned_offset); | |
dd9f438e NS |
639 | last_fsb = ioalign + mp->m_writeio_blocks; |
640 | } else { | |
641 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); | |
1da177e4 | 642 | } |
1da177e4 | 643 | |
dd9f438e | 644 | if (prealloc || extsz) { |
9f6c92b9 | 645 | error = xfs_iomap_eof_align_last_fsb(mp, ip, extsz, &last_fsb); |
dd9f438e | 646 | if (error) |
1da177e4 | 647 | return error; |
1da177e4 | 648 | } |
dd9f438e NS |
649 | |
650 | nimaps = XFS_WRITE_IMAPS; | |
651 | firstblock = NULLFSBLOCK; | |
541d7d3c | 652 | error = xfs_bmapi(NULL, ip, offset_fsb, |
1da177e4 LT |
653 | (xfs_filblks_t)(last_fsb - offset_fsb), |
654 | XFS_BMAPI_DELAY | XFS_BMAPI_WRITE | | |
655 | XFS_BMAPI_ENTIRE, &firstblock, 1, imap, | |
3e57ecf6 | 656 | &nimaps, NULL, NULL); |
dd9f438e | 657 | if (error && (error != ENOSPC)) |
1da177e4 | 658 | return XFS_ERROR(error); |
dd9f438e | 659 | |
1da177e4 LT |
660 | /* |
661 | * If bmapi returned us nothing, and if we didn't get back EDQUOT, | |
dd9f438e | 662 | * then we must have run out of space - flush delalloc, and retry.. |
1da177e4 LT |
663 | */ |
664 | if (nimaps == 0) { | |
665 | xfs_iomap_enter_trace(XFS_IOMAP_WRITE_NOSPACE, | |
541d7d3c | 666 | ip, offset, count); |
1da177e4 LT |
667 | if (xfs_flush_space(ip, &fsynced, &ioflag)) |
668 | return XFS_ERROR(ENOSPC); | |
669 | ||
670 | error = 0; | |
671 | goto retry; | |
672 | } | |
673 | ||
86c4d623 | 674 | if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip))) |
572d95f4 | 675 | return xfs_cmn_err_fsblock_zero(ip, &imap[0]); |
dd9f438e NS |
676 | |
677 | *ret_imap = imap[0]; | |
678 | *nmaps = 1; | |
679 | ||
1da177e4 LT |
680 | return 0; |
681 | } | |
682 | ||
683 | /* | |
684 | * Pass in a delayed allocate extent, convert it to real extents; | |
685 | * return to the caller the extent we create which maps on top of | |
686 | * the originating callers request. | |
687 | * | |
688 | * Called without a lock on the inode. | |
e4143a1c DC |
689 | * |
690 | * We no longer bother to look at the incoming map - all we have to | |
691 | * guarantee is that whatever we allocate fills the required range. | |
1da177e4 LT |
692 | */ |
693 | int | |
694 | xfs_iomap_write_allocate( | |
695 | xfs_inode_t *ip, | |
f403b7f4 | 696 | xfs_off_t offset, |
24e17b5f | 697 | size_t count, |
1da177e4 LT |
698 | xfs_bmbt_irec_t *map, |
699 | int *retmap) | |
700 | { | |
701 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 LT |
702 | xfs_fileoff_t offset_fsb, last_block; |
703 | xfs_fileoff_t end_fsb, map_start_fsb; | |
704 | xfs_fsblock_t first_block; | |
705 | xfs_bmap_free_t free_list; | |
706 | xfs_filblks_t count_fsb; | |
e4143a1c | 707 | xfs_bmbt_irec_t imap; |
1da177e4 | 708 | xfs_trans_t *tp; |
e4143a1c | 709 | int nimaps, committed; |
1da177e4 LT |
710 | int error = 0; |
711 | int nres; | |
712 | ||
713 | *retmap = 0; | |
714 | ||
715 | /* | |
716 | * Make sure that the dquots are there. | |
717 | */ | |
718 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) | |
719 | return XFS_ERROR(error); | |
720 | ||
24e17b5f | 721 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
1da177e4 | 722 | count_fsb = map->br_blockcount; |
24e17b5f | 723 | map_start_fsb = map->br_startoff; |
1da177e4 LT |
724 | |
725 | XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb)); | |
726 | ||
727 | while (count_fsb != 0) { | |
728 | /* | |
729 | * Set up a transaction with which to allocate the | |
730 | * backing store for the file. Do allocations in a | |
731 | * loop until we get some space in the range we are | |
732 | * interested in. The other space that might be allocated | |
733 | * is in the delayed allocation extent on which we sit | |
734 | * but before our buffer starts. | |
735 | */ | |
736 | ||
737 | nimaps = 0; | |
738 | while (nimaps == 0) { | |
739 | tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE); | |
84e1e99f | 740 | tp->t_flags |= XFS_TRANS_RESERVE; |
1da177e4 LT |
741 | nres = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK); |
742 | error = xfs_trans_reserve(tp, nres, | |
743 | XFS_WRITE_LOG_RES(mp), | |
744 | 0, XFS_TRANS_PERM_LOG_RES, | |
745 | XFS_WRITE_LOG_COUNT); | |
1da177e4 LT |
746 | if (error) { |
747 | xfs_trans_cancel(tp, 0); | |
748 | return XFS_ERROR(error); | |
749 | } | |
750 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
751 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
752 | xfs_trans_ihold(tp, ip); | |
753 | ||
9d87c319 | 754 | xfs_bmap_init(&free_list, &first_block); |
1da177e4 | 755 | |
1da177e4 | 756 | /* |
e4143a1c DC |
757 | * it is possible that the extents have changed since |
758 | * we did the read call as we dropped the ilock for a | |
759 | * while. We have to be careful about truncates or hole | |
760 | * punchs here - we are not allowed to allocate | |
761 | * non-delalloc blocks here. | |
762 | * | |
763 | * The only protection against truncation is the pages | |
764 | * for the range we are being asked to convert are | |
765 | * locked and hence a truncate will block on them | |
766 | * first. | |
767 | * | |
768 | * As a result, if we go beyond the range we really | |
769 | * need and hit an delalloc extent boundary followed by | |
770 | * a hole while we have excess blocks in the map, we | |
771 | * will fill the hole incorrectly and overrun the | |
772 | * transaction reservation. | |
773 | * | |
774 | * Using a single map prevents this as we are forced to | |
775 | * check each map we look for overlap with the desired | |
776 | * range and abort as soon as we find it. Also, given | |
777 | * that we only return a single map, having one beyond | |
778 | * what we can return is probably a bit silly. | |
779 | * | |
780 | * We also need to check that we don't go beyond EOF; | |
781 | * this is a truncate optimisation as a truncate sets | |
782 | * the new file size before block on the pages we | |
783 | * currently have locked under writeback. Because they | |
784 | * are about to be tossed, we don't need to write them | |
785 | * back.... | |
1da177e4 | 786 | */ |
e4143a1c | 787 | nimaps = 1; |
ba87ea69 | 788 | end_fsb = XFS_B_TO_FSB(mp, ip->i_size); |
7c9ef85c DC |
789 | error = xfs_bmap_last_offset(NULL, ip, &last_block, |
790 | XFS_DATA_FORK); | |
791 | if (error) | |
792 | goto trans_cancel; | |
793 | ||
1da177e4 LT |
794 | last_block = XFS_FILEOFF_MAX(last_block, end_fsb); |
795 | if ((map_start_fsb + count_fsb) > last_block) { | |
796 | count_fsb = last_block - map_start_fsb; | |
797 | if (count_fsb == 0) { | |
798 | error = EAGAIN; | |
799 | goto trans_cancel; | |
800 | } | |
801 | } | |
802 | ||
803 | /* Go get the actual blocks */ | |
541d7d3c | 804 | error = xfs_bmapi(tp, ip, map_start_fsb, count_fsb, |
1da177e4 | 805 | XFS_BMAPI_WRITE, &first_block, 1, |
e4143a1c | 806 | &imap, &nimaps, &free_list, NULL); |
1da177e4 LT |
807 | if (error) |
808 | goto trans_cancel; | |
809 | ||
f7c99b6f | 810 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
811 | if (error) |
812 | goto trans_cancel; | |
813 | ||
1c72bf90 | 814 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
815 | if (error) |
816 | goto error0; | |
817 | ||
818 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
819 | } | |
820 | ||
821 | /* | |
822 | * See if we were able to allocate an extent that | |
823 | * covers at least part of the callers request | |
824 | */ | |
86c4d623 | 825 | if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) |
e4143a1c | 826 | return xfs_cmn_err_fsblock_zero(ip, &imap); |
86c4d623 | 827 | |
e4143a1c DC |
828 | if ((offset_fsb >= imap.br_startoff) && |
829 | (offset_fsb < (imap.br_startoff + | |
830 | imap.br_blockcount))) { | |
831 | *map = imap; | |
832 | *retmap = 1; | |
833 | XFS_STATS_INC(xs_xstrat_quick); | |
834 | return 0; | |
1da177e4 LT |
835 | } |
836 | ||
e4143a1c DC |
837 | /* |
838 | * So far we have not mapped the requested part of the | |
1da177e4 LT |
839 | * file, just surrounding data, try again. |
840 | */ | |
e4143a1c DC |
841 | count_fsb -= imap.br_blockcount; |
842 | map_start_fsb = imap.br_startoff + imap.br_blockcount; | |
1da177e4 LT |
843 | } |
844 | ||
845 | trans_cancel: | |
846 | xfs_bmap_cancel(&free_list); | |
847 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
848 | error0: | |
849 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
850 | return XFS_ERROR(error); | |
851 | } | |
852 | ||
853 | int | |
854 | xfs_iomap_write_unwritten( | |
855 | xfs_inode_t *ip, | |
f403b7f4 | 856 | xfs_off_t offset, |
1da177e4 LT |
857 | size_t count) |
858 | { | |
859 | xfs_mount_t *mp = ip->i_mount; | |
1da177e4 LT |
860 | xfs_fileoff_t offset_fsb; |
861 | xfs_filblks_t count_fsb; | |
862 | xfs_filblks_t numblks_fsb; | |
dd9f438e NS |
863 | xfs_fsblock_t firstfsb; |
864 | int nimaps; | |
865 | xfs_trans_t *tp; | |
866 | xfs_bmbt_irec_t imap; | |
867 | xfs_bmap_free_t free_list; | |
868 | uint resblks; | |
1da177e4 LT |
869 | int committed; |
870 | int error; | |
1da177e4 | 871 | |
541d7d3c | 872 | xfs_iomap_enter_trace(XFS_IOMAP_UNWRITTEN, ip, offset, count); |
1da177e4 LT |
873 | |
874 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
875 | count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); | |
876 | count_fsb = (xfs_filblks_t)(count_fsb - offset_fsb); | |
877 | ||
4ddd8bb1 LM |
878 | /* |
879 | * Reserve enough blocks in this transaction for two complete extent | |
880 | * btree splits. We may be converting the middle part of an unwritten | |
881 | * extent and in this case we will insert two new extents in the btree | |
882 | * each of which could cause a full split. | |
883 | * | |
884 | * This reservation amount will be used in the first call to | |
885 | * xfs_bmbt_split() to select an AG with enough space to satisfy the | |
886 | * rest of the operation. | |
887 | */ | |
dd9f438e | 888 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0) << 1; |
1da177e4 | 889 | |
dd9f438e | 890 | do { |
1da177e4 LT |
891 | /* |
892 | * set up a transaction to convert the range of extents | |
893 | * from unwritten to real. Do allocations in a loop until | |
894 | * we have covered the range passed in. | |
895 | */ | |
1da177e4 | 896 | tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE); |
84e1e99f | 897 | tp->t_flags |= XFS_TRANS_RESERVE; |
dd9f438e | 898 | error = xfs_trans_reserve(tp, resblks, |
1da177e4 LT |
899 | XFS_WRITE_LOG_RES(mp), 0, |
900 | XFS_TRANS_PERM_LOG_RES, | |
901 | XFS_WRITE_LOG_COUNT); | |
902 | if (error) { | |
903 | xfs_trans_cancel(tp, 0); | |
572d95f4 | 904 | return XFS_ERROR(error); |
1da177e4 LT |
905 | } |
906 | ||
907 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
908 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
909 | xfs_trans_ihold(tp, ip); | |
910 | ||
911 | /* | |
912 | * Modify the unwritten extent state of the buffer. | |
913 | */ | |
9d87c319 | 914 | xfs_bmap_init(&free_list, &firstfsb); |
1da177e4 | 915 | nimaps = 1; |
541d7d3c | 916 | error = xfs_bmapi(tp, ip, offset_fsb, count_fsb, |
dd9f438e | 917 | XFS_BMAPI_WRITE|XFS_BMAPI_CONVERT, &firstfsb, |
3e57ecf6 | 918 | 1, &imap, &nimaps, &free_list, NULL); |
1da177e4 LT |
919 | if (error) |
920 | goto error_on_bmapi_transaction; | |
921 | ||
f7c99b6f | 922 | error = xfs_bmap_finish(&(tp), &(free_list), &committed); |
1da177e4 LT |
923 | if (error) |
924 | goto error_on_bmapi_transaction; | |
925 | ||
1c72bf90 | 926 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
927 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
928 | if (error) | |
572d95f4 NS |
929 | return XFS_ERROR(error); |
930 | ||
86c4d623 | 931 | if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) |
572d95f4 | 932 | return xfs_cmn_err_fsblock_zero(ip, &imap); |
1da177e4 LT |
933 | |
934 | if ((numblks_fsb = imap.br_blockcount) == 0) { | |
935 | /* | |
936 | * The numblks_fsb value should always get | |
937 | * smaller, otherwise the loop is stuck. | |
938 | */ | |
939 | ASSERT(imap.br_blockcount); | |
940 | break; | |
941 | } | |
942 | offset_fsb += numblks_fsb; | |
943 | count_fsb -= numblks_fsb; | |
944 | } while (count_fsb > 0); | |
945 | ||
946 | return 0; | |
947 | ||
948 | error_on_bmapi_transaction: | |
949 | xfs_bmap_cancel(&free_list); | |
950 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT)); | |
951 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1da177e4 LT |
952 | return XFS_ERROR(error); |
953 | } |