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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, | |
56 | xfs_iocore_t *io, | |
57 | xfs_off_t offset, | |
58 | ssize_t count) | |
59 | { | |
60 | xfs_inode_t *ip = XFS_IO_INODE(io); | |
61 | ||
62 | if (!ip->i_rwtrace) | |
63 | return; | |
64 | ||
65 | ktrace_enter(ip->i_rwtrace, | |
66 | (void *)((unsigned long)tag), | |
67 | (void *)ip, | |
68 | (void *)((unsigned long)((ip->i_d.di_size >> 32) & 0xffffffff)), | |
69 | (void *)((unsigned long)(ip->i_d.di_size & 0xffffffff)), | |
70 | (void *)((unsigned long)((offset >> 32) & 0xffffffff)), | |
71 | (void *)((unsigned long)(offset & 0xffffffff)), | |
72 | (void *)((unsigned long)count), | |
73 | (void *)((unsigned long)((io->io_new_size >> 32) & 0xffffffff)), | |
74 | (void *)((unsigned long)(io->io_new_size & 0xffffffff)), | |
f1fdc848 | 75 | (void *)((unsigned long)current_pid()), |
1da177e4 LT |
76 | (void *)NULL, |
77 | (void *)NULL, | |
78 | (void *)NULL, | |
79 | (void *)NULL, | |
80 | (void *)NULL, | |
81 | (void *)NULL); | |
82 | } | |
83 | ||
84 | void | |
85 | xfs_iomap_map_trace( | |
86 | int tag, | |
87 | xfs_iocore_t *io, | |
88 | xfs_off_t offset, | |
89 | ssize_t count, | |
90 | xfs_iomap_t *iomapp, | |
91 | xfs_bmbt_irec_t *imapp, | |
92 | int flags) | |
93 | { | |
94 | xfs_inode_t *ip = XFS_IO_INODE(io); | |
95 | ||
96 | if (!ip->i_rwtrace) | |
97 | return; | |
98 | ||
99 | ktrace_enter(ip->i_rwtrace, | |
100 | (void *)((unsigned long)tag), | |
101 | (void *)ip, | |
102 | (void *)((unsigned long)((ip->i_d.di_size >> 32) & 0xffffffff)), | |
103 | (void *)((unsigned long)(ip->i_d.di_size & 0xffffffff)), | |
104 | (void *)((unsigned long)((offset >> 32) & 0xffffffff)), | |
105 | (void *)((unsigned long)(offset & 0xffffffff)), | |
106 | (void *)((unsigned long)count), | |
107 | (void *)((unsigned long)flags), | |
108 | (void *)((unsigned long)((iomapp->iomap_offset >> 32) & 0xffffffff)), | |
109 | (void *)((unsigned long)(iomapp->iomap_offset & 0xffffffff)), | |
110 | (void *)((unsigned long)(iomapp->iomap_delta)), | |
111 | (void *)((unsigned long)(iomapp->iomap_bsize)), | |
112 | (void *)((unsigned long)(iomapp->iomap_bn)), | |
113 | (void *)(__psint_t)(imapp->br_startoff), | |
114 | (void *)((unsigned long)(imapp->br_blockcount)), | |
115 | (void *)(__psint_t)(imapp->br_startblock)); | |
116 | } | |
117 | #else | |
118 | #define xfs_iomap_enter_trace(tag, io, offset, count) | |
119 | #define xfs_iomap_map_trace(tag, io, offset, count, iomapp, imapp, flags) | |
120 | #endif | |
121 | ||
122 | #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \ | |
123 | << mp->m_writeio_log) | |
124 | #define XFS_STRAT_WRITE_IMAPS 2 | |
125 | #define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP | |
126 | ||
127 | STATIC int | |
128 | xfs_imap_to_bmap( | |
129 | xfs_iocore_t *io, | |
130 | xfs_off_t offset, | |
131 | xfs_bmbt_irec_t *imap, | |
132 | xfs_iomap_t *iomapp, | |
133 | int imaps, /* Number of imap entries */ | |
134 | int iomaps, /* Number of iomap entries */ | |
135 | int flags) | |
136 | { | |
137 | xfs_mount_t *mp; | |
138 | xfs_fsize_t nisize; | |
139 | int pbm; | |
140 | xfs_fsblock_t start_block; | |
141 | ||
142 | mp = io->io_mount; | |
143 | nisize = XFS_SIZE(mp, io); | |
144 | if (io->io_new_size > nisize) | |
145 | nisize = io->io_new_size; | |
146 | ||
147 | for (pbm = 0; imaps && pbm < iomaps; imaps--, iomapp++, imap++, pbm++) { | |
148 | iomapp->iomap_offset = XFS_FSB_TO_B(mp, imap->br_startoff); | |
149 | iomapp->iomap_delta = offset - iomapp->iomap_offset; | |
150 | iomapp->iomap_bsize = XFS_FSB_TO_B(mp, imap->br_blockcount); | |
151 | iomapp->iomap_flags = flags; | |
152 | ||
153 | if (io->io_flags & XFS_IOCORE_RT) { | |
154 | iomapp->iomap_flags |= IOMAP_REALTIME; | |
155 | iomapp->iomap_target = mp->m_rtdev_targp; | |
156 | } else { | |
157 | iomapp->iomap_target = mp->m_ddev_targp; | |
158 | } | |
159 | start_block = imap->br_startblock; | |
160 | if (start_block == HOLESTARTBLOCK) { | |
161 | iomapp->iomap_bn = IOMAP_DADDR_NULL; | |
162 | iomapp->iomap_flags |= IOMAP_HOLE; | |
163 | } else if (start_block == DELAYSTARTBLOCK) { | |
164 | iomapp->iomap_bn = IOMAP_DADDR_NULL; | |
165 | iomapp->iomap_flags |= IOMAP_DELAY; | |
166 | } else { | |
167 | iomapp->iomap_bn = XFS_FSB_TO_DB_IO(io, start_block); | |
168 | if (ISUNWRITTEN(imap)) | |
169 | iomapp->iomap_flags |= IOMAP_UNWRITTEN; | |
170 | } | |
171 | ||
172 | if ((iomapp->iomap_offset + iomapp->iomap_bsize) >= nisize) { | |
173 | iomapp->iomap_flags |= IOMAP_EOF; | |
174 | } | |
175 | ||
176 | offset += iomapp->iomap_bsize - iomapp->iomap_delta; | |
177 | } | |
178 | return pbm; /* Return the number filled */ | |
179 | } | |
180 | ||
181 | int | |
182 | xfs_iomap( | |
183 | xfs_iocore_t *io, | |
184 | xfs_off_t offset, | |
185 | ssize_t count, | |
186 | int flags, | |
187 | xfs_iomap_t *iomapp, | |
188 | int *niomaps) | |
189 | { | |
190 | xfs_mount_t *mp = io->io_mount; | |
191 | xfs_fileoff_t offset_fsb, end_fsb; | |
192 | int error = 0; | |
193 | int lockmode = 0; | |
194 | xfs_bmbt_irec_t imap; | |
195 | int nimaps = 1; | |
196 | int bmapi_flags = 0; | |
197 | int iomap_flags = 0; | |
198 | ||
199 | if (XFS_FORCED_SHUTDOWN(mp)) | |
200 | return XFS_ERROR(EIO); | |
201 | ||
202 | switch (flags & | |
203 | (BMAPI_READ | BMAPI_WRITE | BMAPI_ALLOCATE | | |
204 | BMAPI_UNWRITTEN | BMAPI_DEVICE)) { | |
205 | case BMAPI_READ: | |
206 | xfs_iomap_enter_trace(XFS_IOMAP_READ_ENTER, io, offset, count); | |
207 | lockmode = XFS_LCK_MAP_SHARED(mp, io); | |
208 | bmapi_flags = XFS_BMAPI_ENTIRE; | |
1da177e4 LT |
209 | break; |
210 | case BMAPI_WRITE: | |
211 | xfs_iomap_enter_trace(XFS_IOMAP_WRITE_ENTER, io, offset, count); | |
212 | lockmode = XFS_ILOCK_EXCL|XFS_EXTSIZE_WR; | |
c31e8878 NS |
213 | if (flags & BMAPI_IGNSTATE) |
214 | bmapi_flags |= XFS_BMAPI_IGSTATE|XFS_BMAPI_ENTIRE; | |
1da177e4 LT |
215 | XFS_ILOCK(mp, io, lockmode); |
216 | break; | |
217 | case BMAPI_ALLOCATE: | |
218 | xfs_iomap_enter_trace(XFS_IOMAP_ALLOC_ENTER, io, offset, count); | |
219 | lockmode = XFS_ILOCK_SHARED|XFS_EXTSIZE_RD; | |
220 | bmapi_flags = XFS_BMAPI_ENTIRE; | |
221 | /* Attempt non-blocking lock */ | |
222 | if (flags & BMAPI_TRYLOCK) { | |
223 | if (!XFS_ILOCK_NOWAIT(mp, io, lockmode)) | |
224 | return XFS_ERROR(EAGAIN); | |
225 | } else { | |
226 | XFS_ILOCK(mp, io, lockmode); | |
227 | } | |
228 | break; | |
229 | case BMAPI_UNWRITTEN: | |
230 | goto phase2; | |
231 | case BMAPI_DEVICE: | |
232 | lockmode = XFS_LCK_MAP_SHARED(mp, io); | |
233 | iomapp->iomap_target = io->io_flags & XFS_IOCORE_RT ? | |
234 | mp->m_rtdev_targp : mp->m_ddev_targp; | |
235 | error = 0; | |
236 | *niomaps = 1; | |
237 | goto out; | |
238 | default: | |
239 | BUG(); | |
240 | } | |
241 | ||
242 | ASSERT(offset <= mp->m_maxioffset); | |
243 | if ((xfs_fsize_t)offset + count > mp->m_maxioffset) | |
244 | count = mp->m_maxioffset - offset; | |
245 | end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); | |
246 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
247 | ||
248 | error = XFS_BMAPI(mp, NULL, io, offset_fsb, | |
249 | (xfs_filblks_t)(end_fsb - offset_fsb), | |
250 | bmapi_flags, NULL, 0, &imap, | |
3e57ecf6 | 251 | &nimaps, NULL, NULL); |
1da177e4 LT |
252 | |
253 | if (error) | |
254 | goto out; | |
255 | ||
256 | phase2: | |
257 | switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE|BMAPI_UNWRITTEN)) { | |
258 | case BMAPI_WRITE: | |
259 | /* If we found an extent, return it */ | |
68d1498c | 260 | if (nimaps && |
dd9f438e | 261 | (imap.br_startblock != HOLESTARTBLOCK) && |
68d1498c | 262 | (imap.br_startblock != DELAYSTARTBLOCK)) { |
1da177e4 LT |
263 | xfs_iomap_map_trace(XFS_IOMAP_WRITE_MAP, io, |
264 | offset, count, iomapp, &imap, flags); | |
265 | break; | |
266 | } | |
267 | ||
268 | if (flags & (BMAPI_DIRECT|BMAPI_MMAP)) { | |
269 | error = XFS_IOMAP_WRITE_DIRECT(mp, io, offset, | |
270 | count, flags, &imap, &nimaps, nimaps); | |
271 | } else { | |
272 | error = XFS_IOMAP_WRITE_DELAY(mp, io, offset, count, | |
273 | flags, &imap, &nimaps); | |
274 | } | |
275 | if (!error) { | |
276 | xfs_iomap_map_trace(XFS_IOMAP_ALLOC_MAP, io, | |
277 | offset, count, iomapp, &imap, flags); | |
278 | } | |
279 | iomap_flags = IOMAP_NEW; | |
280 | break; | |
281 | case BMAPI_ALLOCATE: | |
282 | /* If we found an extent, return it */ | |
283 | XFS_IUNLOCK(mp, io, lockmode); | |
284 | lockmode = 0; | |
285 | ||
286 | if (nimaps && !ISNULLSTARTBLOCK(imap.br_startblock)) { | |
287 | xfs_iomap_map_trace(XFS_IOMAP_WRITE_MAP, io, | |
288 | offset, count, iomapp, &imap, flags); | |
289 | break; | |
290 | } | |
291 | ||
24e17b5f NS |
292 | error = XFS_IOMAP_WRITE_ALLOCATE(mp, io, offset, count, |
293 | &imap, &nimaps); | |
1da177e4 LT |
294 | break; |
295 | case BMAPI_UNWRITTEN: | |
296 | lockmode = 0; | |
297 | error = XFS_IOMAP_WRITE_UNWRITTEN(mp, io, offset, count); | |
298 | nimaps = 0; | |
299 | break; | |
300 | } | |
301 | ||
302 | if (nimaps) { | |
303 | *niomaps = xfs_imap_to_bmap(io, offset, &imap, | |
304 | iomapp, nimaps, *niomaps, iomap_flags); | |
305 | } else if (niomaps) { | |
306 | *niomaps = 0; | |
307 | } | |
308 | ||
309 | out: | |
310 | if (lockmode) | |
311 | XFS_IUNLOCK(mp, io, lockmode); | |
312 | return XFS_ERROR(error); | |
313 | } | |
314 | ||
dd9f438e NS |
315 | STATIC int |
316 | xfs_iomap_eof_align_last_fsb( | |
317 | xfs_mount_t *mp, | |
318 | xfs_iocore_t *io, | |
319 | xfs_fsize_t isize, | |
320 | xfs_extlen_t extsize, | |
321 | xfs_fileoff_t *last_fsb) | |
322 | { | |
323 | xfs_fileoff_t new_last_fsb = 0; | |
324 | xfs_extlen_t align; | |
325 | int eof, error; | |
326 | ||
327 | if (io->io_flags & XFS_IOCORE_RT) | |
328 | ; | |
329 | /* | |
330 | * If mounted with the "-o swalloc" option, roundup the allocation | |
331 | * request to a stripe width boundary if the file size is >= | |
332 | * stripe width and we are allocating past the allocation eof. | |
333 | */ | |
334 | else if (mp->m_swidth && (mp->m_flags & XFS_MOUNT_SWALLOC) && | |
335 | (isize >= XFS_FSB_TO_B(mp, mp->m_swidth))) | |
336 | new_last_fsb = roundup_64(*last_fsb, mp->m_swidth); | |
337 | /* | |
338 | * Roundup the allocation request to a stripe unit (m_dalign) boundary | |
339 | * if the file size is >= stripe unit size, and we are allocating past | |
340 | * the allocation eof. | |
341 | */ | |
342 | else if (mp->m_dalign && (isize >= XFS_FSB_TO_B(mp, mp->m_dalign))) | |
343 | new_last_fsb = roundup_64(*last_fsb, mp->m_dalign); | |
344 | ||
345 | /* | |
346 | * Always round up the allocation request to an extent boundary | |
347 | * (when file on a real-time subvolume or has di_extsize hint). | |
348 | */ | |
349 | if (extsize) { | |
350 | if (new_last_fsb) | |
351 | align = roundup_64(new_last_fsb, extsize); | |
352 | else | |
353 | align = extsize; | |
354 | new_last_fsb = roundup_64(*last_fsb, align); | |
355 | } | |
356 | ||
357 | if (new_last_fsb) { | |
358 | error = XFS_BMAP_EOF(mp, io, new_last_fsb, XFS_DATA_FORK, &eof); | |
359 | if (error) | |
360 | return error; | |
361 | if (eof) | |
362 | *last_fsb = new_last_fsb; | |
363 | } | |
364 | return 0; | |
365 | } | |
366 | ||
1da177e4 LT |
367 | STATIC int |
368 | xfs_flush_space( | |
369 | xfs_inode_t *ip, | |
370 | int *fsynced, | |
371 | int *ioflags) | |
372 | { | |
373 | switch (*fsynced) { | |
374 | case 0: | |
375 | if (ip->i_delayed_blks) { | |
376 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
377 | xfs_flush_inode(ip); | |
378 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
379 | *fsynced = 1; | |
380 | } else { | |
381 | *ioflags |= BMAPI_SYNC; | |
382 | *fsynced = 2; | |
383 | } | |
384 | return 0; | |
385 | case 1: | |
386 | *fsynced = 2; | |
387 | *ioflags |= BMAPI_SYNC; | |
388 | return 0; | |
389 | case 2: | |
390 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
391 | xfs_flush_device(ip); | |
392 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
393 | *fsynced = 3; | |
394 | return 0; | |
395 | } | |
396 | return 1; | |
397 | } | |
398 | ||
572d95f4 NS |
399 | STATIC int |
400 | xfs_cmn_err_fsblock_zero( | |
401 | xfs_inode_t *ip, | |
402 | xfs_bmbt_irec_t *imap) | |
403 | { | |
404 | xfs_cmn_err(XFS_PTAG_FSBLOCK_ZERO, CE_ALERT, ip->i_mount, | |
405 | "Access to block zero in inode %llu " | |
406 | "start_block: %llx start_off: %llx " | |
407 | "blkcnt: %llx extent-state: %x\n", | |
408 | (unsigned long long)ip->i_ino, | |
409 | (unsigned long long)imap->br_startblock, | |
410 | (unsigned long long)imap->br_startoff, | |
411 | (unsigned long long)imap->br_blockcount, | |
412 | imap->br_state); | |
413 | return EFSCORRUPTED; | |
414 | } | |
415 | ||
1da177e4 LT |
416 | int |
417 | xfs_iomap_write_direct( | |
418 | xfs_inode_t *ip, | |
f403b7f4 | 419 | xfs_off_t offset, |
1da177e4 LT |
420 | size_t count, |
421 | int flags, | |
422 | xfs_bmbt_irec_t *ret_imap, | |
423 | int *nmaps, | |
424 | int found) | |
425 | { | |
426 | xfs_mount_t *mp = ip->i_mount; | |
427 | xfs_iocore_t *io = &ip->i_iocore; | |
428 | xfs_fileoff_t offset_fsb; | |
429 | xfs_fileoff_t last_fsb; | |
dd9f438e | 430 | xfs_filblks_t count_fsb, resaligned; |
1da177e4 | 431 | xfs_fsblock_t firstfsb; |
dd9f438e NS |
432 | xfs_extlen_t extsz, temp; |
433 | xfs_fsize_t isize; | |
0116d935 | 434 | int nimaps; |
1da177e4 | 435 | int bmapi_flag; |
06d10dd9 | 436 | int quota_flag; |
1da177e4 LT |
437 | int rt; |
438 | xfs_trans_t *tp; | |
0116d935 | 439 | xfs_bmbt_irec_t imap; |
1da177e4 | 440 | xfs_bmap_free_t free_list; |
dd9f438e | 441 | uint qblocks, resblks, resrtextents; |
1da177e4 | 442 | int committed; |
dd9f438e | 443 | int error; |
1da177e4 LT |
444 | |
445 | /* | |
446 | * Make sure that the dquots are there. This doesn't hold | |
447 | * the ilock across a disk read. | |
448 | */ | |
449 | error = XFS_QM_DQATTACH(ip->i_mount, ip, XFS_QMOPT_ILOCKED); | |
450 | if (error) | |
451 | return XFS_ERROR(error); | |
452 | ||
dd9f438e NS |
453 | rt = XFS_IS_REALTIME_INODE(ip); |
454 | if (unlikely(rt)) { | |
455 | if (!(extsz = ip->i_d.di_extsize)) | |
456 | extsz = mp->m_sb.sb_rextsize; | |
457 | } else { | |
458 | extsz = ip->i_d.di_extsize; | |
1da177e4 LT |
459 | } |
460 | ||
ba87ea69 | 461 | isize = ip->i_size; |
dd9f438e NS |
462 | if (io->io_new_size > isize) |
463 | isize = io->io_new_size; | |
1da177e4 | 464 | |
dd9f438e NS |
465 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
466 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); | |
467 | if ((offset + count) > isize) { | |
468 | error = xfs_iomap_eof_align_last_fsb(mp, io, isize, extsz, | |
469 | &last_fsb); | |
470 | if (error) | |
471 | goto error_out; | |
1da177e4 | 472 | } else { |
dd9f438e NS |
473 | if (found && (ret_imap->br_startblock == HOLESTARTBLOCK)) |
474 | last_fsb = MIN(last_fsb, (xfs_fileoff_t) | |
475 | ret_imap->br_blockcount + | |
476 | ret_imap->br_startoff); | |
1da177e4 | 477 | } |
dd9f438e NS |
478 | count_fsb = last_fsb - offset_fsb; |
479 | ASSERT(count_fsb > 0); | |
480 | ||
481 | resaligned = count_fsb; | |
482 | if (unlikely(extsz)) { | |
483 | if ((temp = do_mod(offset_fsb, extsz))) | |
484 | resaligned += temp; | |
485 | if ((temp = do_mod(resaligned, extsz))) | |
486 | resaligned += extsz - temp; | |
487 | } | |
488 | ||
489 | if (unlikely(rt)) { | |
490 | resrtextents = qblocks = resaligned; | |
491 | resrtextents /= mp->m_sb.sb_rextsize; | |
492 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); | |
493 | quota_flag = XFS_QMOPT_RES_RTBLKS; | |
494 | } else { | |
495 | resrtextents = 0; | |
496 | resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resaligned); | |
497 | quota_flag = XFS_QMOPT_RES_REGBLKS; | |
498 | } | |
1da177e4 LT |
499 | |
500 | /* | |
06d10dd9 | 501 | * Allocate and setup the transaction |
1da177e4 LT |
502 | */ |
503 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
504 | tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); | |
1da177e4 | 505 | error = xfs_trans_reserve(tp, resblks, |
d52b44d0 | 506 | XFS_WRITE_LOG_RES(mp), resrtextents, |
1da177e4 LT |
507 | XFS_TRANS_PERM_LOG_RES, |
508 | XFS_WRITE_LOG_COUNT); | |
1da177e4 | 509 | /* |
06d10dd9 | 510 | * Check for running out of space, note: need lock to return |
1da177e4 LT |
511 | */ |
512 | if (error) | |
1da177e4 | 513 | xfs_trans_cancel(tp, 0); |
1da177e4 | 514 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
1da177e4 | 515 | if (error) |
06d10dd9 | 516 | goto error_out; |
1da177e4 | 517 | |
dd9f438e NS |
518 | error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, |
519 | qblocks, 0, quota_flag); | |
520 | if (error) | |
1da177e4 | 521 | goto error1; |
1da177e4 | 522 | |
1da177e4 LT |
523 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
524 | xfs_trans_ihold(tp, ip); | |
525 | ||
dd9f438e | 526 | bmapi_flag = XFS_BMAPI_WRITE; |
ba87ea69 | 527 | if ((flags & BMAPI_DIRECT) && (offset < ip->i_size || extsz)) |
1da177e4 LT |
528 | bmapi_flag |= XFS_BMAPI_PREALLOC; |
529 | ||
530 | /* | |
dd9f438e | 531 | * Issue the xfs_bmapi() call to allocate the blocks |
1da177e4 LT |
532 | */ |
533 | XFS_BMAP_INIT(&free_list, &firstfsb); | |
06d10dd9 | 534 | nimaps = 1; |
3e57ecf6 OW |
535 | error = XFS_BMAPI(mp, tp, io, offset_fsb, count_fsb, bmapi_flag, |
536 | &firstfsb, 0, &imap, &nimaps, &free_list, NULL); | |
06d10dd9 | 537 | if (error) |
1da177e4 | 538 | goto error0; |
1da177e4 LT |
539 | |
540 | /* | |
06d10dd9 | 541 | * Complete the transaction |
1da177e4 | 542 | */ |
f7c99b6f | 543 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
06d10dd9 | 544 | if (error) |
1da177e4 | 545 | goto error0; |
1c72bf90 | 546 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
06d10dd9 | 547 | if (error) |
1da177e4 | 548 | goto error_out; |
1da177e4 | 549 | |
06d10dd9 NS |
550 | /* |
551 | * Copy any maps to caller's array and return any error. | |
552 | */ | |
1da177e4 | 553 | if (nimaps == 0) { |
572d95f4 NS |
554 | error = ENOSPC; |
555 | goto error_out; | |
556 | } | |
557 | ||
558 | if (unlikely(!imap.br_startblock && !(io->io_flags & XFS_IOCORE_RT))) { | |
559 | error = xfs_cmn_err_fsblock_zero(ip, &imap); | |
1da177e4 LT |
560 | goto error_out; |
561 | } | |
562 | ||
0116d935 | 563 | *ret_imap = imap; |
1da177e4 | 564 | *nmaps = 1; |
1da177e4 LT |
565 | return 0; |
566 | ||
06d10dd9 | 567 | error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
1da177e4 | 568 | xfs_bmap_cancel(&free_list); |
06d10dd9 | 569 | XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, qblocks, 0, quota_flag); |
1da177e4 | 570 | |
06d10dd9 | 571 | error1: /* Just cancel transaction */ |
1da177e4 LT |
572 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
573 | *nmaps = 0; /* nothing set-up here */ | |
574 | ||
575 | error_out: | |
576 | return XFS_ERROR(error); | |
577 | } | |
578 | ||
dd9f438e NS |
579 | /* |
580 | * If the caller is doing a write at the end of the file, | |
581 | * then extend the allocation out to the file system's write | |
582 | * iosize. We clean up any extra space left over when the | |
583 | * file is closed in xfs_inactive(). | |
584 | * | |
585 | * For sync writes, we are flushing delayed allocate space to | |
586 | * try to make additional space available for allocation near | |
587 | * the filesystem full boundary - preallocation hurts in that | |
588 | * situation, of course. | |
589 | */ | |
590 | STATIC int | |
591 | xfs_iomap_eof_want_preallocate( | |
592 | xfs_mount_t *mp, | |
593 | xfs_iocore_t *io, | |
594 | xfs_fsize_t isize, | |
595 | xfs_off_t offset, | |
596 | size_t count, | |
597 | int ioflag, | |
598 | xfs_bmbt_irec_t *imap, | |
599 | int nimaps, | |
600 | int *prealloc) | |
601 | { | |
602 | xfs_fileoff_t start_fsb; | |
603 | xfs_filblks_t count_fsb; | |
604 | xfs_fsblock_t firstblock; | |
605 | int n, error, imaps; | |
606 | ||
607 | *prealloc = 0; | |
608 | if ((ioflag & BMAPI_SYNC) || (offset + count) <= isize) | |
609 | return 0; | |
610 | ||
611 | /* | |
612 | * If there are any real blocks past eof, then don't | |
613 | * do any speculative allocation. | |
614 | */ | |
615 | start_fsb = XFS_B_TO_FSBT(mp, ((xfs_ufsize_t)(offset + count - 1))); | |
616 | count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); | |
617 | while (count_fsb > 0) { | |
618 | imaps = nimaps; | |
3ddb8fa9 | 619 | firstblock = NULLFSBLOCK; |
3e57ecf6 OW |
620 | error = XFS_BMAPI(mp, NULL, io, start_fsb, count_fsb, 0, |
621 | &firstblock, 0, imap, &imaps, NULL, NULL); | |
dd9f438e NS |
622 | if (error) |
623 | return error; | |
624 | for (n = 0; n < imaps; n++) { | |
625 | if ((imap[n].br_startblock != HOLESTARTBLOCK) && | |
626 | (imap[n].br_startblock != DELAYSTARTBLOCK)) | |
627 | return 0; | |
628 | start_fsb += imap[n].br_blockcount; | |
629 | count_fsb -= imap[n].br_blockcount; | |
630 | } | |
631 | } | |
632 | *prealloc = 1; | |
633 | return 0; | |
634 | } | |
635 | ||
1da177e4 LT |
636 | int |
637 | xfs_iomap_write_delay( | |
638 | xfs_inode_t *ip, | |
f403b7f4 | 639 | xfs_off_t offset, |
1da177e4 LT |
640 | size_t count, |
641 | int ioflag, | |
642 | xfs_bmbt_irec_t *ret_imap, | |
643 | int *nmaps) | |
644 | { | |
645 | xfs_mount_t *mp = ip->i_mount; | |
646 | xfs_iocore_t *io = &ip->i_iocore; | |
647 | xfs_fileoff_t offset_fsb; | |
648 | xfs_fileoff_t last_fsb; | |
dd9f438e NS |
649 | xfs_off_t aligned_offset; |
650 | xfs_fileoff_t ioalign; | |
1da177e4 | 651 | xfs_fsblock_t firstblock; |
dd9f438e NS |
652 | xfs_extlen_t extsz; |
653 | xfs_fsize_t isize; | |
1da177e4 | 654 | int nimaps; |
1da177e4 | 655 | xfs_bmbt_irec_t imap[XFS_WRITE_IMAPS]; |
dd9f438e NS |
656 | int prealloc, fsynced = 0; |
657 | int error; | |
1da177e4 LT |
658 | |
659 | ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE) != 0); | |
660 | ||
661 | /* | |
662 | * Make sure that the dquots are there. This doesn't hold | |
663 | * the ilock across a disk read. | |
664 | */ | |
1da177e4 LT |
665 | error = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED); |
666 | if (error) | |
667 | return XFS_ERROR(error); | |
668 | ||
dd9f438e NS |
669 | if (XFS_IS_REALTIME_INODE(ip)) { |
670 | if (!(extsz = ip->i_d.di_extsize)) | |
671 | extsz = mp->m_sb.sb_rextsize; | |
672 | } else { | |
673 | extsz = ip->i_d.di_extsize; | |
674 | } | |
675 | ||
676 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
677 | ||
1da177e4 | 678 | retry: |
ba87ea69 | 679 | isize = ip->i_size; |
dd9f438e | 680 | if (io->io_new_size > isize) |
1da177e4 | 681 | isize = io->io_new_size; |
1da177e4 | 682 | |
dd9f438e NS |
683 | error = xfs_iomap_eof_want_preallocate(mp, io, isize, offset, count, |
684 | ioflag, imap, XFS_WRITE_IMAPS, &prealloc); | |
685 | if (error) | |
686 | return error; | |
1da177e4 | 687 | |
dd9f438e | 688 | if (prealloc) { |
1da177e4 LT |
689 | aligned_offset = XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); |
690 | ioalign = XFS_B_TO_FSBT(mp, aligned_offset); | |
dd9f438e NS |
691 | last_fsb = ioalign + mp->m_writeio_blocks; |
692 | } else { | |
693 | last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); | |
1da177e4 | 694 | } |
1da177e4 | 695 | |
dd9f438e NS |
696 | if (prealloc || extsz) { |
697 | error = xfs_iomap_eof_align_last_fsb(mp, io, isize, extsz, | |
698 | &last_fsb); | |
699 | if (error) | |
1da177e4 | 700 | return error; |
1da177e4 | 701 | } |
dd9f438e NS |
702 | |
703 | nimaps = XFS_WRITE_IMAPS; | |
704 | firstblock = NULLFSBLOCK; | |
3e57ecf6 | 705 | error = XFS_BMAPI(mp, NULL, io, offset_fsb, |
1da177e4 LT |
706 | (xfs_filblks_t)(last_fsb - offset_fsb), |
707 | XFS_BMAPI_DELAY | XFS_BMAPI_WRITE | | |
708 | XFS_BMAPI_ENTIRE, &firstblock, 1, imap, | |
3e57ecf6 | 709 | &nimaps, NULL, NULL); |
dd9f438e | 710 | if (error && (error != ENOSPC)) |
1da177e4 | 711 | return XFS_ERROR(error); |
dd9f438e | 712 | |
1da177e4 LT |
713 | /* |
714 | * If bmapi returned us nothing, and if we didn't get back EDQUOT, | |
dd9f438e | 715 | * then we must have run out of space - flush delalloc, and retry.. |
1da177e4 LT |
716 | */ |
717 | if (nimaps == 0) { | |
718 | xfs_iomap_enter_trace(XFS_IOMAP_WRITE_NOSPACE, | |
719 | io, offset, count); | |
720 | if (xfs_flush_space(ip, &fsynced, &ioflag)) | |
721 | return XFS_ERROR(ENOSPC); | |
722 | ||
723 | error = 0; | |
724 | goto retry; | |
725 | } | |
726 | ||
572d95f4 NS |
727 | if (unlikely(!imap[0].br_startblock && !(io->io_flags & XFS_IOCORE_RT))) |
728 | return xfs_cmn_err_fsblock_zero(ip, &imap[0]); | |
dd9f438e NS |
729 | |
730 | *ret_imap = imap[0]; | |
731 | *nmaps = 1; | |
732 | ||
1da177e4 LT |
733 | return 0; |
734 | } | |
735 | ||
736 | /* | |
737 | * Pass in a delayed allocate extent, convert it to real extents; | |
738 | * return to the caller the extent we create which maps on top of | |
739 | * the originating callers request. | |
740 | * | |
741 | * Called without a lock on the inode. | |
742 | */ | |
743 | int | |
744 | xfs_iomap_write_allocate( | |
745 | xfs_inode_t *ip, | |
f403b7f4 | 746 | xfs_off_t offset, |
24e17b5f | 747 | size_t count, |
1da177e4 LT |
748 | xfs_bmbt_irec_t *map, |
749 | int *retmap) | |
750 | { | |
751 | xfs_mount_t *mp = ip->i_mount; | |
752 | xfs_iocore_t *io = &ip->i_iocore; | |
753 | xfs_fileoff_t offset_fsb, last_block; | |
754 | xfs_fileoff_t end_fsb, map_start_fsb; | |
755 | xfs_fsblock_t first_block; | |
756 | xfs_bmap_free_t free_list; | |
757 | xfs_filblks_t count_fsb; | |
758 | xfs_bmbt_irec_t imap[XFS_STRAT_WRITE_IMAPS]; | |
759 | xfs_trans_t *tp; | |
760 | int i, nimaps, committed; | |
761 | int error = 0; | |
762 | int nres; | |
763 | ||
764 | *retmap = 0; | |
765 | ||
766 | /* | |
767 | * Make sure that the dquots are there. | |
768 | */ | |
769 | if ((error = XFS_QM_DQATTACH(mp, ip, 0))) | |
770 | return XFS_ERROR(error); | |
771 | ||
24e17b5f | 772 | offset_fsb = XFS_B_TO_FSBT(mp, offset); |
1da177e4 | 773 | count_fsb = map->br_blockcount; |
24e17b5f | 774 | map_start_fsb = map->br_startoff; |
1da177e4 LT |
775 | |
776 | XFS_STATS_ADD(xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb)); | |
777 | ||
778 | while (count_fsb != 0) { | |
779 | /* | |
780 | * Set up a transaction with which to allocate the | |
781 | * backing store for the file. Do allocations in a | |
782 | * loop until we get some space in the range we are | |
783 | * interested in. The other space that might be allocated | |
784 | * is in the delayed allocation extent on which we sit | |
785 | * but before our buffer starts. | |
786 | */ | |
787 | ||
788 | nimaps = 0; | |
789 | while (nimaps == 0) { | |
790 | tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE); | |
791 | nres = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK); | |
792 | error = xfs_trans_reserve(tp, nres, | |
793 | XFS_WRITE_LOG_RES(mp), | |
794 | 0, XFS_TRANS_PERM_LOG_RES, | |
795 | XFS_WRITE_LOG_COUNT); | |
796 | if (error == ENOSPC) { | |
797 | error = xfs_trans_reserve(tp, 0, | |
798 | XFS_WRITE_LOG_RES(mp), | |
799 | 0, | |
800 | XFS_TRANS_PERM_LOG_RES, | |
801 | XFS_WRITE_LOG_COUNT); | |
802 | } | |
803 | if (error) { | |
804 | xfs_trans_cancel(tp, 0); | |
805 | return XFS_ERROR(error); | |
806 | } | |
807 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
808 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
809 | xfs_trans_ihold(tp, ip); | |
810 | ||
811 | XFS_BMAP_INIT(&free_list, &first_block); | |
812 | ||
813 | nimaps = XFS_STRAT_WRITE_IMAPS; | |
814 | /* | |
815 | * Ensure we don't go beyond eof - it is possible | |
816 | * the extents changed since we did the read call, | |
817 | * we dropped the ilock in the interim. | |
818 | */ | |
819 | ||
ba87ea69 | 820 | end_fsb = XFS_B_TO_FSB(mp, ip->i_size); |
1da177e4 LT |
821 | xfs_bmap_last_offset(NULL, ip, &last_block, |
822 | XFS_DATA_FORK); | |
823 | last_block = XFS_FILEOFF_MAX(last_block, end_fsb); | |
824 | if ((map_start_fsb + count_fsb) > last_block) { | |
825 | count_fsb = last_block - map_start_fsb; | |
826 | if (count_fsb == 0) { | |
827 | error = EAGAIN; | |
828 | goto trans_cancel; | |
829 | } | |
830 | } | |
831 | ||
832 | /* Go get the actual blocks */ | |
3e57ecf6 | 833 | error = XFS_BMAPI(mp, tp, io, map_start_fsb, count_fsb, |
1da177e4 | 834 | XFS_BMAPI_WRITE, &first_block, 1, |
3e57ecf6 | 835 | imap, &nimaps, &free_list, NULL); |
1da177e4 LT |
836 | if (error) |
837 | goto trans_cancel; | |
838 | ||
f7c99b6f | 839 | error = xfs_bmap_finish(&tp, &free_list, &committed); |
1da177e4 LT |
840 | if (error) |
841 | goto trans_cancel; | |
842 | ||
1c72bf90 | 843 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
844 | if (error) |
845 | goto error0; | |
846 | ||
847 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
848 | } | |
849 | ||
850 | /* | |
851 | * See if we were able to allocate an extent that | |
852 | * covers at least part of the callers request | |
853 | */ | |
1da177e4 | 854 | for (i = 0; i < nimaps; i++) { |
572d95f4 NS |
855 | if (unlikely(!imap[i].br_startblock && |
856 | !(io->io_flags & XFS_IOCORE_RT))) | |
857 | return xfs_cmn_err_fsblock_zero(ip, &imap[i]); | |
24e17b5f NS |
858 | if ((offset_fsb >= imap[i].br_startoff) && |
859 | (offset_fsb < (imap[i].br_startoff + | |
860 | imap[i].br_blockcount))) { | |
1da177e4 LT |
861 | *map = imap[i]; |
862 | *retmap = 1; | |
863 | XFS_STATS_INC(xs_xstrat_quick); | |
864 | return 0; | |
865 | } | |
866 | count_fsb -= imap[i].br_blockcount; | |
867 | } | |
868 | ||
869 | /* So far we have not mapped the requested part of the | |
870 | * file, just surrounding data, try again. | |
871 | */ | |
872 | nimaps--; | |
24e17b5f NS |
873 | map_start_fsb = imap[nimaps].br_startoff + |
874 | imap[nimaps].br_blockcount; | |
1da177e4 LT |
875 | } |
876 | ||
877 | trans_cancel: | |
878 | xfs_bmap_cancel(&free_list); | |
879 | xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); | |
880 | error0: | |
881 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
882 | return XFS_ERROR(error); | |
883 | } | |
884 | ||
885 | int | |
886 | xfs_iomap_write_unwritten( | |
887 | xfs_inode_t *ip, | |
f403b7f4 | 888 | xfs_off_t offset, |
1da177e4 LT |
889 | size_t count) |
890 | { | |
891 | xfs_mount_t *mp = ip->i_mount; | |
892 | xfs_iocore_t *io = &ip->i_iocore; | |
1da177e4 LT |
893 | xfs_fileoff_t offset_fsb; |
894 | xfs_filblks_t count_fsb; | |
895 | xfs_filblks_t numblks_fsb; | |
dd9f438e NS |
896 | xfs_fsblock_t firstfsb; |
897 | int nimaps; | |
898 | xfs_trans_t *tp; | |
899 | xfs_bmbt_irec_t imap; | |
900 | xfs_bmap_free_t free_list; | |
901 | uint resblks; | |
1da177e4 LT |
902 | int committed; |
903 | int error; | |
1da177e4 LT |
904 | |
905 | xfs_iomap_enter_trace(XFS_IOMAP_UNWRITTEN, | |
906 | &ip->i_iocore, offset, count); | |
907 | ||
908 | offset_fsb = XFS_B_TO_FSBT(mp, offset); | |
909 | count_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); | |
910 | count_fsb = (xfs_filblks_t)(count_fsb - offset_fsb); | |
911 | ||
dd9f438e | 912 | resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0) << 1; |
1da177e4 | 913 | |
dd9f438e | 914 | do { |
1da177e4 LT |
915 | /* |
916 | * set up a transaction to convert the range of extents | |
917 | * from unwritten to real. Do allocations in a loop until | |
918 | * we have covered the range passed in. | |
919 | */ | |
920 | ||
921 | tp = xfs_trans_alloc(mp, XFS_TRANS_STRAT_WRITE); | |
dd9f438e | 922 | error = xfs_trans_reserve(tp, resblks, |
1da177e4 LT |
923 | XFS_WRITE_LOG_RES(mp), 0, |
924 | XFS_TRANS_PERM_LOG_RES, | |
925 | XFS_WRITE_LOG_COUNT); | |
926 | if (error) { | |
927 | xfs_trans_cancel(tp, 0); | |
572d95f4 | 928 | return XFS_ERROR(error); |
1da177e4 LT |
929 | } |
930 | ||
931 | xfs_ilock(ip, XFS_ILOCK_EXCL); | |
932 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
933 | xfs_trans_ihold(tp, ip); | |
934 | ||
935 | /* | |
936 | * Modify the unwritten extent state of the buffer. | |
937 | */ | |
938 | XFS_BMAP_INIT(&free_list, &firstfsb); | |
939 | nimaps = 1; | |
3e57ecf6 | 940 | error = XFS_BMAPI(mp, tp, io, offset_fsb, count_fsb, |
dd9f438e | 941 | XFS_BMAPI_WRITE|XFS_BMAPI_CONVERT, &firstfsb, |
3e57ecf6 | 942 | 1, &imap, &nimaps, &free_list, NULL); |
1da177e4 LT |
943 | if (error) |
944 | goto error_on_bmapi_transaction; | |
945 | ||
f7c99b6f | 946 | error = xfs_bmap_finish(&(tp), &(free_list), &committed); |
1da177e4 LT |
947 | if (error) |
948 | goto error_on_bmapi_transaction; | |
949 | ||
1c72bf90 | 950 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
1da177e4 LT |
951 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
952 | if (error) | |
572d95f4 NS |
953 | return XFS_ERROR(error); |
954 | ||
955 | if (unlikely(!imap.br_startblock && | |
956 | !(io->io_flags & XFS_IOCORE_RT))) | |
957 | return xfs_cmn_err_fsblock_zero(ip, &imap); | |
1da177e4 LT |
958 | |
959 | if ((numblks_fsb = imap.br_blockcount) == 0) { | |
960 | /* | |
961 | * The numblks_fsb value should always get | |
962 | * smaller, otherwise the loop is stuck. | |
963 | */ | |
964 | ASSERT(imap.br_blockcount); | |
965 | break; | |
966 | } | |
967 | offset_fsb += numblks_fsb; | |
968 | count_fsb -= numblks_fsb; | |
969 | } while (count_fsb > 0); | |
970 | ||
971 | return 0; | |
972 | ||
973 | error_on_bmapi_transaction: | |
974 | xfs_bmap_cancel(&free_list); | |
975 | xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT)); | |
976 | xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
1da177e4 LT |
977 | return XFS_ERROR(error); |
978 | } |