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ccd979bd MF |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * file.c | |
5 | * | |
6 | * File open, close, extend, truncate | |
7 | * | |
8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public | |
21 | * License along with this program; if not, write to the | |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | * Boston, MA 021110-1307, USA. | |
24 | */ | |
25 | ||
16f7e0fe | 26 | #include <linux/capability.h> |
ccd979bd MF |
27 | #include <linux/fs.h> |
28 | #include <linux/types.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/highmem.h> | |
31 | #include <linux/pagemap.h> | |
32 | #include <linux/uio.h> | |
33 | ||
34 | #define MLOG_MASK_PREFIX ML_INODE | |
35 | #include <cluster/masklog.h> | |
36 | ||
37 | #include "ocfs2.h" | |
38 | ||
39 | #include "alloc.h" | |
40 | #include "aops.h" | |
41 | #include "dir.h" | |
42 | #include "dlmglue.h" | |
43 | #include "extent_map.h" | |
44 | #include "file.h" | |
45 | #include "sysfile.h" | |
46 | #include "inode.h" | |
47 | #include "journal.h" | |
48 | #include "mmap.h" | |
49 | #include "suballoc.h" | |
50 | #include "super.h" | |
51 | ||
52 | #include "buffer_head_io.h" | |
53 | ||
54 | static int ocfs2_sync_inode(struct inode *inode) | |
55 | { | |
56 | filemap_fdatawrite(inode->i_mapping); | |
57 | return sync_mapping_buffers(inode->i_mapping); | |
58 | } | |
59 | ||
60 | static int ocfs2_file_open(struct inode *inode, struct file *file) | |
61 | { | |
62 | int status; | |
63 | int mode = file->f_flags; | |
64 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
65 | ||
66 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, | |
67 | file->f_dentry->d_name.len, file->f_dentry->d_name.name); | |
68 | ||
69 | spin_lock(&oi->ip_lock); | |
70 | ||
71 | /* Check that the inode hasn't been wiped from disk by another | |
72 | * node. If it hasn't then we're safe as long as we hold the | |
73 | * spin lock until our increment of open count. */ | |
74 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { | |
75 | spin_unlock(&oi->ip_lock); | |
76 | ||
77 | status = -ENOENT; | |
78 | goto leave; | |
79 | } | |
80 | ||
81 | if (mode & O_DIRECT) | |
82 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; | |
83 | ||
84 | oi->ip_open_count++; | |
85 | spin_unlock(&oi->ip_lock); | |
86 | status = 0; | |
87 | leave: | |
88 | mlog_exit(status); | |
89 | return status; | |
90 | } | |
91 | ||
92 | static int ocfs2_file_release(struct inode *inode, struct file *file) | |
93 | { | |
94 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
95 | ||
96 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, | |
97 | file->f_dentry->d_name.len, | |
98 | file->f_dentry->d_name.name); | |
99 | ||
100 | spin_lock(&oi->ip_lock); | |
101 | if (!--oi->ip_open_count) | |
102 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; | |
103 | spin_unlock(&oi->ip_lock); | |
104 | ||
105 | mlog_exit(0); | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | static int ocfs2_sync_file(struct file *file, | |
111 | struct dentry *dentry, | |
112 | int datasync) | |
113 | { | |
114 | int err = 0; | |
115 | journal_t *journal; | |
116 | struct inode *inode = dentry->d_inode; | |
117 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
118 | ||
119 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync, | |
120 | dentry->d_name.len, dentry->d_name.name); | |
121 | ||
122 | err = ocfs2_sync_inode(dentry->d_inode); | |
123 | if (err) | |
124 | goto bail; | |
125 | ||
126 | journal = osb->journal->j_journal; | |
127 | err = journal_force_commit(journal); | |
128 | ||
129 | bail: | |
130 | mlog_exit(err); | |
131 | ||
132 | return (err < 0) ? -EIO : 0; | |
133 | } | |
134 | ||
135 | int ocfs2_set_inode_size(struct ocfs2_journal_handle *handle, | |
136 | struct inode *inode, | |
137 | struct buffer_head *fe_bh, | |
138 | u64 new_i_size) | |
139 | { | |
140 | int status; | |
141 | ||
142 | mlog_entry_void(); | |
143 | i_size_write(inode, new_i_size); | |
144 | inode->i_blocks = ocfs2_align_bytes_to_sectors(new_i_size); | |
145 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; | |
146 | ||
147 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
148 | if (status < 0) { | |
149 | mlog_errno(status); | |
150 | goto bail; | |
151 | } | |
152 | ||
153 | bail: | |
154 | mlog_exit(status); | |
155 | return status; | |
156 | } | |
157 | ||
158 | static int ocfs2_simple_size_update(struct inode *inode, | |
159 | struct buffer_head *di_bh, | |
160 | u64 new_i_size) | |
161 | { | |
162 | int ret; | |
163 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
164 | struct ocfs2_journal_handle *handle = NULL; | |
165 | ||
166 | handle = ocfs2_start_trans(osb, NULL, | |
167 | OCFS2_INODE_UPDATE_CREDITS); | |
168 | if (handle == NULL) { | |
169 | ret = -ENOMEM; | |
170 | mlog_errno(ret); | |
171 | goto out; | |
172 | } | |
173 | ||
174 | ret = ocfs2_set_inode_size(handle, inode, di_bh, | |
175 | new_i_size); | |
176 | if (ret < 0) | |
177 | mlog_errno(ret); | |
178 | ||
179 | ocfs2_commit_trans(handle); | |
180 | out: | |
181 | return ret; | |
182 | } | |
183 | ||
184 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, | |
185 | struct inode *inode, | |
186 | struct buffer_head *fe_bh, | |
187 | u64 new_i_size) | |
188 | { | |
189 | int status; | |
190 | struct ocfs2_journal_handle *handle; | |
191 | ||
192 | mlog_entry_void(); | |
193 | ||
194 | /* TODO: This needs to actually orphan the inode in this | |
195 | * transaction. */ | |
196 | ||
197 | handle = ocfs2_start_trans(osb, NULL, OCFS2_INODE_UPDATE_CREDITS); | |
198 | if (IS_ERR(handle)) { | |
199 | status = PTR_ERR(handle); | |
200 | mlog_errno(status); | |
201 | goto out; | |
202 | } | |
203 | ||
204 | status = ocfs2_set_inode_size(handle, inode, fe_bh, new_i_size); | |
205 | if (status < 0) | |
206 | mlog_errno(status); | |
207 | ||
208 | ocfs2_commit_trans(handle); | |
209 | out: | |
210 | mlog_exit(status); | |
211 | return status; | |
212 | } | |
213 | ||
214 | static int ocfs2_truncate_file(struct inode *inode, | |
215 | struct buffer_head *di_bh, | |
216 | u64 new_i_size) | |
217 | { | |
218 | int status = 0; | |
219 | struct ocfs2_dinode *fe = NULL; | |
220 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
221 | struct ocfs2_truncate_context *tc = NULL; | |
222 | ||
b0697053 MF |
223 | mlog_entry("(inode = %llu, new_i_size = %llu\n", |
224 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
225 | (unsigned long long)new_i_size); | |
ccd979bd MF |
226 | |
227 | truncate_inode_pages(inode->i_mapping, new_i_size); | |
228 | ||
229 | fe = (struct ocfs2_dinode *) di_bh->b_data; | |
230 | if (!OCFS2_IS_VALID_DINODE(fe)) { | |
231 | OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe); | |
232 | status = -EIO; | |
233 | goto bail; | |
234 | } | |
235 | ||
236 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), | |
b0697053 MF |
237 | "Inode %llu, inode i_size = %lld != di " |
238 | "i_size = %llu, i_flags = 0x%x\n", | |
239 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ccd979bd | 240 | i_size_read(inode), |
b0697053 MF |
241 | (unsigned long long)le64_to_cpu(fe->i_size), |
242 | le32_to_cpu(fe->i_flags)); | |
ccd979bd MF |
243 | |
244 | if (new_i_size > le64_to_cpu(fe->i_size)) { | |
b0697053 MF |
245 | mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", |
246 | (unsigned long long)le64_to_cpu(fe->i_size), | |
247 | (unsigned long long)new_i_size); | |
ccd979bd MF |
248 | status = -EINVAL; |
249 | mlog_errno(status); | |
250 | goto bail; | |
251 | } | |
252 | ||
b0697053 MF |
253 | mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", |
254 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
255 | (unsigned long long)le64_to_cpu(fe->i_size), | |
256 | (unsigned long long)new_i_size); | |
ccd979bd MF |
257 | |
258 | /* lets handle the simple truncate cases before doing any more | |
259 | * cluster locking. */ | |
260 | if (new_i_size == le64_to_cpu(fe->i_size)) | |
261 | goto bail; | |
262 | ||
263 | if (le32_to_cpu(fe->i_clusters) == | |
264 | ocfs2_clusters_for_bytes(osb->sb, new_i_size)) { | |
265 | mlog(0, "fe->i_clusters = %u, so we do a simple truncate\n", | |
266 | fe->i_clusters); | |
267 | /* No allocation change is required, so lets fast path | |
268 | * this truncate. */ | |
269 | status = ocfs2_simple_size_update(inode, di_bh, new_i_size); | |
270 | if (status < 0) | |
271 | mlog_errno(status); | |
272 | goto bail; | |
273 | } | |
274 | ||
275 | /* This forces other nodes to sync and drop their pages */ | |
276 | status = ocfs2_data_lock(inode, 1); | |
277 | if (status < 0) { | |
278 | mlog_errno(status); | |
279 | goto bail; | |
280 | } | |
281 | ocfs2_data_unlock(inode, 1); | |
282 | ||
283 | /* alright, we're going to need to do a full blown alloc size | |
284 | * change. Orphan the inode so that recovery can complete the | |
285 | * truncate if necessary. This does the task of marking | |
286 | * i_size. */ | |
287 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); | |
288 | if (status < 0) { | |
289 | mlog_errno(status); | |
290 | goto bail; | |
291 | } | |
292 | ||
293 | status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc); | |
294 | if (status < 0) { | |
295 | mlog_errno(status); | |
296 | goto bail; | |
297 | } | |
298 | ||
299 | status = ocfs2_commit_truncate(osb, inode, di_bh, tc); | |
300 | if (status < 0) { | |
301 | mlog_errno(status); | |
302 | goto bail; | |
303 | } | |
304 | ||
305 | /* TODO: orphan dir cleanup here. */ | |
306 | bail: | |
307 | ||
308 | mlog_exit(status); | |
309 | return status; | |
310 | } | |
311 | ||
312 | /* | |
313 | * extend allocation only here. | |
314 | * we'll update all the disk stuff, and oip->alloc_size | |
315 | * | |
316 | * expect stuff to be locked, a transaction started and enough data / | |
317 | * metadata reservations in the contexts. | |
318 | * | |
319 | * Will return -EAGAIN, and a reason if a restart is needed. | |
320 | * If passed in, *reason will always be set, even in error. | |
321 | */ | |
322 | int ocfs2_do_extend_allocation(struct ocfs2_super *osb, | |
323 | struct inode *inode, | |
324 | u32 clusters_to_add, | |
325 | struct buffer_head *fe_bh, | |
326 | struct ocfs2_journal_handle *handle, | |
327 | struct ocfs2_alloc_context *data_ac, | |
328 | struct ocfs2_alloc_context *meta_ac, | |
329 | enum ocfs2_alloc_restarted *reason_ret) | |
330 | { | |
331 | int status = 0; | |
332 | int free_extents; | |
333 | struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data; | |
334 | enum ocfs2_alloc_restarted reason = RESTART_NONE; | |
335 | u32 bit_off, num_bits; | |
336 | u64 block; | |
337 | ||
338 | BUG_ON(!clusters_to_add); | |
339 | ||
340 | free_extents = ocfs2_num_free_extents(osb, inode, fe); | |
341 | if (free_extents < 0) { | |
342 | status = free_extents; | |
343 | mlog_errno(status); | |
344 | goto leave; | |
345 | } | |
346 | ||
347 | /* there are two cases which could cause us to EAGAIN in the | |
348 | * we-need-more-metadata case: | |
349 | * 1) we haven't reserved *any* | |
350 | * 2) we are so fragmented, we've needed to add metadata too | |
351 | * many times. */ | |
352 | if (!free_extents && !meta_ac) { | |
353 | mlog(0, "we haven't reserved any metadata!\n"); | |
354 | status = -EAGAIN; | |
355 | reason = RESTART_META; | |
356 | goto leave; | |
357 | } else if ((!free_extents) | |
358 | && (ocfs2_alloc_context_bits_left(meta_ac) | |
359 | < ocfs2_extend_meta_needed(fe))) { | |
360 | mlog(0, "filesystem is really fragmented...\n"); | |
361 | status = -EAGAIN; | |
362 | reason = RESTART_META; | |
363 | goto leave; | |
364 | } | |
365 | ||
366 | status = ocfs2_claim_clusters(osb, handle, data_ac, 1, | |
367 | &bit_off, &num_bits); | |
368 | if (status < 0) { | |
369 | if (status != -ENOSPC) | |
370 | mlog_errno(status); | |
371 | goto leave; | |
372 | } | |
373 | ||
374 | BUG_ON(num_bits > clusters_to_add); | |
375 | ||
376 | /* reserve our write early -- insert_extent may update the inode */ | |
377 | status = ocfs2_journal_access(handle, inode, fe_bh, | |
378 | OCFS2_JOURNAL_ACCESS_WRITE); | |
379 | if (status < 0) { | |
380 | mlog_errno(status); | |
381 | goto leave; | |
382 | } | |
383 | ||
384 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
b0697053 MF |
385 | mlog(0, "Allocating %u clusters at block %u for inode %llu\n", |
386 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
ccd979bd MF |
387 | status = ocfs2_insert_extent(osb, handle, inode, fe_bh, block, |
388 | num_bits, meta_ac); | |
389 | if (status < 0) { | |
390 | mlog_errno(status); | |
391 | goto leave; | |
392 | } | |
393 | ||
394 | le32_add_cpu(&fe->i_clusters, num_bits); | |
395 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
396 | OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); | |
397 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
398 | ||
399 | status = ocfs2_journal_dirty(handle, fe_bh); | |
400 | if (status < 0) { | |
401 | mlog_errno(status); | |
402 | goto leave; | |
403 | } | |
404 | ||
405 | clusters_to_add -= num_bits; | |
406 | ||
407 | if (clusters_to_add) { | |
408 | mlog(0, "need to alloc once more, clusters = %u, wanted = " | |
409 | "%u\n", fe->i_clusters, clusters_to_add); | |
410 | status = -EAGAIN; | |
411 | reason = RESTART_TRANS; | |
412 | } | |
413 | ||
414 | leave: | |
415 | mlog_exit(status); | |
416 | if (reason_ret) | |
417 | *reason_ret = reason; | |
418 | return status; | |
419 | } | |
420 | ||
421 | static int ocfs2_extend_allocation(struct inode *inode, | |
422 | u32 clusters_to_add) | |
423 | { | |
424 | int status = 0; | |
425 | int restart_func = 0; | |
426 | int drop_alloc_sem = 0; | |
427 | int credits, num_free_extents; | |
428 | u32 prev_clusters; | |
429 | struct buffer_head *bh = NULL; | |
430 | struct ocfs2_dinode *fe = NULL; | |
431 | struct ocfs2_journal_handle *handle = NULL; | |
432 | struct ocfs2_alloc_context *data_ac = NULL; | |
433 | struct ocfs2_alloc_context *meta_ac = NULL; | |
434 | enum ocfs2_alloc_restarted why; | |
435 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
436 | ||
437 | mlog_entry("(clusters_to_add = %u)\n", clusters_to_add); | |
438 | ||
439 | status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, &bh, | |
440 | OCFS2_BH_CACHED, inode); | |
441 | if (status < 0) { | |
442 | mlog_errno(status); | |
443 | goto leave; | |
444 | } | |
445 | ||
446 | fe = (struct ocfs2_dinode *) bh->b_data; | |
447 | if (!OCFS2_IS_VALID_DINODE(fe)) { | |
448 | OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe); | |
449 | status = -EIO; | |
450 | goto leave; | |
451 | } | |
452 | ||
453 | restart_all: | |
454 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); | |
455 | ||
b0697053 | 456 | mlog(0, "extend inode %llu, i_size = %lld, fe->i_clusters = %u, " |
ccd979bd | 457 | "clusters_to_add = %u\n", |
b0697053 | 458 | (unsigned long long)OCFS2_I(inode)->ip_blkno, i_size_read(inode), |
ccd979bd MF |
459 | fe->i_clusters, clusters_to_add); |
460 | ||
461 | handle = ocfs2_alloc_handle(osb); | |
462 | if (handle == NULL) { | |
463 | status = -ENOMEM; | |
464 | mlog_errno(status); | |
465 | goto leave; | |
466 | } | |
467 | ||
468 | num_free_extents = ocfs2_num_free_extents(osb, | |
469 | inode, | |
470 | fe); | |
471 | if (num_free_extents < 0) { | |
472 | status = num_free_extents; | |
473 | mlog_errno(status); | |
474 | goto leave; | |
475 | } | |
476 | ||
477 | if (!num_free_extents) { | |
478 | status = ocfs2_reserve_new_metadata(osb, | |
479 | handle, | |
480 | fe, | |
481 | &meta_ac); | |
482 | if (status < 0) { | |
483 | if (status != -ENOSPC) | |
484 | mlog_errno(status); | |
485 | goto leave; | |
486 | } | |
487 | } | |
488 | ||
489 | status = ocfs2_reserve_clusters(osb, | |
490 | handle, | |
491 | clusters_to_add, | |
492 | &data_ac); | |
493 | if (status < 0) { | |
494 | if (status != -ENOSPC) | |
495 | mlog_errno(status); | |
496 | goto leave; | |
497 | } | |
498 | ||
499 | /* blocks peope in read/write from reading our allocation | |
1b1dcc1b | 500 | * until we're done changing it. We depend on i_mutex to block |
ccd979bd MF |
501 | * other extend/truncate calls while we're here. Ordering wrt |
502 | * start_trans is important here -- always do it before! */ | |
503 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
504 | drop_alloc_sem = 1; | |
505 | ||
506 | credits = ocfs2_calc_extend_credits(osb->sb, fe, clusters_to_add); | |
507 | handle = ocfs2_start_trans(osb, handle, credits); | |
508 | if (IS_ERR(handle)) { | |
509 | status = PTR_ERR(handle); | |
510 | handle = NULL; | |
511 | mlog_errno(status); | |
512 | goto leave; | |
513 | } | |
514 | ||
515 | restarted_transaction: | |
516 | /* reserve a write to the file entry early on - that we if we | |
517 | * run out of credits in the allocation path, we can still | |
518 | * update i_size. */ | |
519 | status = ocfs2_journal_access(handle, inode, bh, | |
520 | OCFS2_JOURNAL_ACCESS_WRITE); | |
521 | if (status < 0) { | |
522 | mlog_errno(status); | |
523 | goto leave; | |
524 | } | |
525 | ||
526 | prev_clusters = OCFS2_I(inode)->ip_clusters; | |
527 | ||
528 | status = ocfs2_do_extend_allocation(osb, | |
529 | inode, | |
530 | clusters_to_add, | |
531 | bh, | |
532 | handle, | |
533 | data_ac, | |
534 | meta_ac, | |
535 | &why); | |
536 | if ((status < 0) && (status != -EAGAIN)) { | |
537 | if (status != -ENOSPC) | |
538 | mlog_errno(status); | |
539 | goto leave; | |
540 | } | |
541 | ||
542 | status = ocfs2_journal_dirty(handle, bh); | |
543 | if (status < 0) { | |
544 | mlog_errno(status); | |
545 | goto leave; | |
546 | } | |
547 | ||
548 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
549 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); | |
550 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
551 | ||
552 | if (why != RESTART_NONE && clusters_to_add) { | |
553 | if (why == RESTART_META) { | |
554 | mlog(0, "restarting function.\n"); | |
555 | restart_func = 1; | |
556 | } else { | |
557 | BUG_ON(why != RESTART_TRANS); | |
558 | ||
559 | mlog(0, "restarting transaction.\n"); | |
560 | /* TODO: This can be more intelligent. */ | |
561 | credits = ocfs2_calc_extend_credits(osb->sb, | |
562 | fe, | |
563 | clusters_to_add); | |
564 | status = ocfs2_extend_trans(handle, credits); | |
565 | if (status < 0) { | |
566 | /* handle still has to be committed at | |
567 | * this point. */ | |
568 | status = -ENOMEM; | |
569 | mlog_errno(status); | |
570 | goto leave; | |
571 | } | |
572 | goto restarted_transaction; | |
573 | } | |
574 | } | |
575 | ||
b0697053 MF |
576 | mlog(0, "fe: i_clusters = %u, i_size=%llu\n", |
577 | fe->i_clusters, (unsigned long long)fe->i_size); | |
ccd979bd MF |
578 | mlog(0, "inode: ip_clusters=%u, i_size=%lld\n", |
579 | OCFS2_I(inode)->ip_clusters, i_size_read(inode)); | |
580 | ||
581 | leave: | |
582 | if (drop_alloc_sem) { | |
583 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
584 | drop_alloc_sem = 0; | |
585 | } | |
586 | if (handle) { | |
587 | ocfs2_commit_trans(handle); | |
588 | handle = NULL; | |
589 | } | |
590 | if (data_ac) { | |
591 | ocfs2_free_alloc_context(data_ac); | |
592 | data_ac = NULL; | |
593 | } | |
594 | if (meta_ac) { | |
595 | ocfs2_free_alloc_context(meta_ac); | |
596 | meta_ac = NULL; | |
597 | } | |
598 | if ((!status) && restart_func) { | |
599 | restart_func = 0; | |
600 | goto restart_all; | |
601 | } | |
602 | if (bh) { | |
603 | brelse(bh); | |
604 | bh = NULL; | |
605 | } | |
606 | ||
607 | mlog_exit(status); | |
608 | return status; | |
609 | } | |
610 | ||
611 | /* Some parts of this taken from generic_cont_expand, which turned out | |
612 | * to be too fragile to do exactly what we need without us having to | |
613 | * worry about recursive locking in ->commit_write(). */ | |
614 | static int ocfs2_write_zero_page(struct inode *inode, | |
615 | u64 size) | |
616 | { | |
617 | struct address_space *mapping = inode->i_mapping; | |
618 | struct page *page; | |
619 | unsigned long index; | |
620 | unsigned int offset; | |
621 | struct ocfs2_journal_handle *handle = NULL; | |
622 | int ret; | |
623 | ||
624 | offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */ | |
625 | /* ugh. in prepare/commit_write, if from==to==start of block, we | |
626 | ** skip the prepare. make sure we never send an offset for the start | |
627 | ** of a block | |
628 | */ | |
629 | if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) { | |
630 | offset++; | |
631 | } | |
632 | index = size >> PAGE_CACHE_SHIFT; | |
633 | ||
634 | page = grab_cache_page(mapping, index); | |
635 | if (!page) { | |
636 | ret = -ENOMEM; | |
637 | mlog_errno(ret); | |
638 | goto out; | |
639 | } | |
640 | ||
641 | ret = ocfs2_prepare_write(NULL, page, offset, offset); | |
642 | if (ret < 0) { | |
643 | mlog_errno(ret); | |
644 | goto out_unlock; | |
645 | } | |
646 | ||
647 | if (ocfs2_should_order_data(inode)) { | |
648 | handle = ocfs2_start_walk_page_trans(inode, page, offset, | |
649 | offset); | |
650 | if (IS_ERR(handle)) { | |
651 | ret = PTR_ERR(handle); | |
652 | handle = NULL; | |
653 | goto out_unlock; | |
654 | } | |
655 | } | |
656 | ||
657 | /* must not update i_size! */ | |
658 | ret = block_commit_write(page, offset, offset); | |
659 | if (ret < 0) | |
660 | mlog_errno(ret); | |
661 | else | |
662 | ret = 0; | |
663 | ||
664 | if (handle) | |
665 | ocfs2_commit_trans(handle); | |
666 | out_unlock: | |
667 | unlock_page(page); | |
668 | page_cache_release(page); | |
669 | out: | |
670 | return ret; | |
671 | } | |
672 | ||
673 | static int ocfs2_zero_extend(struct inode *inode, | |
674 | u64 zero_to_size) | |
675 | { | |
676 | int ret = 0; | |
677 | u64 start_off; | |
678 | struct super_block *sb = inode->i_sb; | |
679 | ||
680 | start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); | |
681 | while (start_off < zero_to_size) { | |
682 | ret = ocfs2_write_zero_page(inode, start_off); | |
683 | if (ret < 0) { | |
684 | mlog_errno(ret); | |
685 | goto out; | |
686 | } | |
687 | ||
688 | start_off += sb->s_blocksize; | |
689 | } | |
690 | ||
691 | out: | |
692 | return ret; | |
693 | } | |
694 | ||
695 | static int ocfs2_extend_file(struct inode *inode, | |
696 | struct buffer_head *di_bh, | |
697 | u64 new_i_size) | |
698 | { | |
699 | int ret = 0; | |
700 | u32 clusters_to_add; | |
701 | ||
702 | /* setattr sometimes calls us like this. */ | |
703 | if (new_i_size == 0) | |
704 | goto out; | |
705 | ||
706 | if (i_size_read(inode) == new_i_size) | |
707 | goto out; | |
708 | BUG_ON(new_i_size < i_size_read(inode)); | |
709 | ||
710 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size) - | |
711 | OCFS2_I(inode)->ip_clusters; | |
712 | ||
713 | if (clusters_to_add) { | |
714 | ret = ocfs2_extend_allocation(inode, clusters_to_add); | |
715 | if (ret < 0) { | |
716 | mlog_errno(ret); | |
717 | goto out; | |
718 | } | |
719 | ||
720 | ret = ocfs2_zero_extend(inode, new_i_size); | |
721 | if (ret < 0) { | |
722 | mlog_errno(ret); | |
723 | goto out; | |
724 | } | |
725 | } | |
726 | ||
727 | /* No allocation required, we just use this helper to | |
728 | * do a trivial update of i_size. */ | |
729 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); | |
730 | if (ret < 0) { | |
731 | mlog_errno(ret); | |
732 | goto out; | |
733 | } | |
734 | ||
735 | out: | |
736 | return ret; | |
737 | } | |
738 | ||
739 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
740 | { | |
741 | int status = 0, size_change; | |
742 | struct inode *inode = dentry->d_inode; | |
743 | struct super_block *sb = inode->i_sb; | |
744 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
745 | struct buffer_head *bh = NULL; | |
746 | struct ocfs2_journal_handle *handle = NULL; | |
747 | ||
748 | mlog_entry("(0x%p, '%.*s')\n", dentry, | |
749 | dentry->d_name.len, dentry->d_name.name); | |
750 | ||
751 | if (attr->ia_valid & ATTR_MODE) | |
752 | mlog(0, "mode change: %d\n", attr->ia_mode); | |
753 | if (attr->ia_valid & ATTR_UID) | |
754 | mlog(0, "uid change: %d\n", attr->ia_uid); | |
755 | if (attr->ia_valid & ATTR_GID) | |
756 | mlog(0, "gid change: %d\n", attr->ia_gid); | |
757 | if (attr->ia_valid & ATTR_SIZE) | |
758 | mlog(0, "size change...\n"); | |
759 | if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME)) | |
760 | mlog(0, "time change...\n"); | |
761 | ||
762 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ | |
763 | | ATTR_GID | ATTR_UID | ATTR_MODE) | |
764 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) { | |
765 | mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid); | |
766 | return 0; | |
767 | } | |
768 | ||
769 | status = inode_change_ok(inode, attr); | |
770 | if (status) | |
771 | return status; | |
772 | ||
773 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; | |
774 | if (size_change) { | |
775 | status = ocfs2_rw_lock(inode, 1); | |
776 | if (status < 0) { | |
777 | mlog_errno(status); | |
778 | goto bail; | |
779 | } | |
780 | } | |
781 | ||
782 | status = ocfs2_meta_lock(inode, NULL, &bh, 1); | |
783 | if (status < 0) { | |
784 | if (status != -ENOENT) | |
785 | mlog_errno(status); | |
786 | goto bail_unlock_rw; | |
787 | } | |
788 | ||
789 | if (size_change && attr->ia_size != i_size_read(inode)) { | |
790 | if (i_size_read(inode) > attr->ia_size) | |
791 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); | |
792 | else | |
793 | status = ocfs2_extend_file(inode, bh, attr->ia_size); | |
794 | if (status < 0) { | |
795 | if (status != -ENOSPC) | |
796 | mlog_errno(status); | |
797 | status = -ENOSPC; | |
798 | goto bail_unlock; | |
799 | } | |
800 | } | |
801 | ||
802 | handle = ocfs2_start_trans(osb, NULL, OCFS2_INODE_UPDATE_CREDITS); | |
803 | if (IS_ERR(handle)) { | |
804 | status = PTR_ERR(handle); | |
805 | mlog_errno(status); | |
806 | goto bail_unlock; | |
807 | } | |
808 | ||
809 | status = inode_setattr(inode, attr); | |
810 | if (status < 0) { | |
811 | mlog_errno(status); | |
812 | goto bail_commit; | |
813 | } | |
814 | ||
815 | status = ocfs2_mark_inode_dirty(handle, inode, bh); | |
816 | if (status < 0) | |
817 | mlog_errno(status); | |
818 | ||
819 | bail_commit: | |
820 | ocfs2_commit_trans(handle); | |
821 | bail_unlock: | |
822 | ocfs2_meta_unlock(inode, 1); | |
823 | bail_unlock_rw: | |
824 | if (size_change) | |
825 | ocfs2_rw_unlock(inode, 1); | |
826 | bail: | |
827 | if (bh) | |
828 | brelse(bh); | |
829 | ||
830 | mlog_exit(status); | |
831 | return status; | |
832 | } | |
833 | ||
834 | int ocfs2_getattr(struct vfsmount *mnt, | |
835 | struct dentry *dentry, | |
836 | struct kstat *stat) | |
837 | { | |
838 | struct inode *inode = dentry->d_inode; | |
839 | struct super_block *sb = dentry->d_inode->i_sb; | |
840 | struct ocfs2_super *osb = sb->s_fs_info; | |
841 | int err; | |
842 | ||
843 | mlog_entry_void(); | |
844 | ||
845 | err = ocfs2_inode_revalidate(dentry); | |
846 | if (err) { | |
847 | if (err != -ENOENT) | |
848 | mlog_errno(err); | |
849 | goto bail; | |
850 | } | |
851 | ||
852 | generic_fillattr(inode, stat); | |
853 | ||
854 | /* We set the blksize from the cluster size for performance */ | |
855 | stat->blksize = osb->s_clustersize; | |
856 | ||
857 | bail: | |
858 | mlog_exit(err); | |
859 | ||
860 | return err; | |
861 | } | |
862 | ||
863 | static int ocfs2_write_remove_suid(struct inode *inode) | |
864 | { | |
865 | int ret; | |
866 | struct buffer_head *bh = NULL; | |
867 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
868 | struct ocfs2_journal_handle *handle; | |
869 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
870 | struct ocfs2_dinode *di; | |
871 | ||
b0697053 MF |
872 | mlog_entry("(Inode %llu, mode 0%o)\n", |
873 | (unsigned long long)oi->ip_blkno, inode->i_mode); | |
ccd979bd MF |
874 | |
875 | handle = ocfs2_start_trans(osb, NULL, OCFS2_INODE_UPDATE_CREDITS); | |
876 | if (handle == NULL) { | |
877 | ret = -ENOMEM; | |
878 | mlog_errno(ret); | |
879 | goto out; | |
880 | } | |
881 | ||
882 | ret = ocfs2_read_block(osb, oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode); | |
883 | if (ret < 0) { | |
884 | mlog_errno(ret); | |
885 | goto out_trans; | |
886 | } | |
887 | ||
888 | ret = ocfs2_journal_access(handle, inode, bh, | |
889 | OCFS2_JOURNAL_ACCESS_WRITE); | |
890 | if (ret < 0) { | |
891 | mlog_errno(ret); | |
892 | goto out_bh; | |
893 | } | |
894 | ||
895 | inode->i_mode &= ~S_ISUID; | |
896 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) | |
897 | inode->i_mode &= ~S_ISGID; | |
898 | ||
899 | di = (struct ocfs2_dinode *) bh->b_data; | |
900 | di->i_mode = cpu_to_le16(inode->i_mode); | |
901 | ||
902 | ret = ocfs2_journal_dirty(handle, bh); | |
903 | if (ret < 0) | |
904 | mlog_errno(ret); | |
905 | out_bh: | |
906 | brelse(bh); | |
907 | out_trans: | |
908 | ocfs2_commit_trans(handle); | |
909 | out: | |
910 | mlog_exit(ret); | |
911 | return ret; | |
912 | } | |
913 | ||
914 | static inline int ocfs2_write_should_remove_suid(struct inode *inode) | |
915 | { | |
916 | mode_t mode = inode->i_mode; | |
917 | ||
918 | if (!capable(CAP_FSETID)) { | |
919 | if (unlikely(mode & S_ISUID)) | |
920 | return 1; | |
921 | ||
922 | if (unlikely((mode & S_ISGID) && (mode & S_IXGRP))) | |
923 | return 1; | |
924 | } | |
925 | return 0; | |
926 | } | |
927 | ||
928 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, | |
929 | const char __user *buf, | |
930 | size_t count, | |
931 | loff_t pos) | |
932 | { | |
933 | struct iovec local_iov = { .iov_base = (void __user *)buf, | |
934 | .iov_len = count }; | |
935 | int ret, rw_level = -1, meta_level = -1, have_alloc_sem = 0; | |
936 | u32 clusters; | |
937 | struct file *filp = iocb->ki_filp; | |
938 | struct inode *inode = filp->f_dentry->d_inode; | |
939 | loff_t newsize, saved_pos; | |
ccd979bd MF |
940 | |
941 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", filp, buf, | |
942 | (unsigned int)count, | |
943 | filp->f_dentry->d_name.len, | |
944 | filp->f_dentry->d_name.name); | |
945 | ||
946 | /* happy write of zero bytes */ | |
947 | if (count == 0) | |
948 | return 0; | |
949 | ||
950 | if (!inode) { | |
951 | mlog(0, "bad inode\n"); | |
952 | return -EIO; | |
953 | } | |
954 | ||
1b1dcc1b JS |
955 | mutex_lock(&inode->i_mutex); |
956 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ | |
ccd979bd MF |
957 | if (filp->f_flags & O_DIRECT) { |
958 | have_alloc_sem = 1; | |
959 | down_read(&inode->i_alloc_sem); | |
960 | } | |
961 | ||
962 | /* concurrent O_DIRECT writes are allowed */ | |
963 | rw_level = (filp->f_flags & O_DIRECT) ? 0 : 1; | |
964 | ret = ocfs2_rw_lock(inode, rw_level); | |
965 | if (ret < 0) { | |
966 | rw_level = -1; | |
967 | mlog_errno(ret); | |
968 | goto out; | |
969 | } | |
970 | ||
971 | /* | |
972 | * We sample i_size under a read level meta lock to see if our write | |
973 | * is extending the file, if it is we back off and get a write level | |
974 | * meta lock. | |
975 | */ | |
976 | meta_level = (filp->f_flags & O_APPEND) ? 1 : 0; | |
977 | for(;;) { | |
978 | ret = ocfs2_meta_lock(inode, NULL, NULL, meta_level); | |
979 | if (ret < 0) { | |
980 | meta_level = -1; | |
981 | mlog_errno(ret); | |
982 | goto out; | |
983 | } | |
984 | ||
985 | /* Clear suid / sgid if necessary. We do this here | |
986 | * instead of later in the write path because | |
987 | * remove_suid() calls ->setattr without any hint that | |
988 | * we may have already done our cluster locking. Since | |
989 | * ocfs2_setattr() *must* take cluster locks to | |
990 | * proceeed, this will lead us to recursively lock the | |
991 | * inode. There's also the dinode i_size state which | |
992 | * can be lost via setattr during extending writes (we | |
993 | * set inode->i_size at the end of a write. */ | |
994 | if (ocfs2_write_should_remove_suid(inode)) { | |
995 | if (meta_level == 0) { | |
996 | ocfs2_meta_unlock(inode, meta_level); | |
997 | meta_level = 1; | |
998 | continue; | |
999 | } | |
1000 | ||
1001 | ret = ocfs2_write_remove_suid(inode); | |
1002 | if (ret < 0) { | |
1003 | mlog_errno(ret); | |
1004 | goto out; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | /* work on a copy of ppos until we're sure that we won't have | |
1009 | * to recalculate it due to relocking. */ | |
1010 | if (filp->f_flags & O_APPEND) { | |
1011 | saved_pos = i_size_read(inode); | |
1012 | mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos); | |
1013 | } else { | |
1014 | saved_pos = iocb->ki_pos; | |
1015 | } | |
1016 | newsize = count + saved_pos; | |
1017 | ||
215c7f9f MF |
1018 | mlog(0, "pos=%lld newsize=%lld cursize=%lld\n", |
1019 | (long long) saved_pos, (long long) newsize, | |
1020 | (long long) i_size_read(inode)); | |
ccd979bd MF |
1021 | |
1022 | /* No need for a higher level metadata lock if we're | |
1023 | * never going past i_size. */ | |
1024 | if (newsize <= i_size_read(inode)) | |
1025 | break; | |
1026 | ||
1027 | if (meta_level == 0) { | |
1028 | ocfs2_meta_unlock(inode, meta_level); | |
1029 | meta_level = 1; | |
1030 | continue; | |
1031 | } | |
1032 | ||
1033 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
1034 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, newsize) - | |
1035 | OCFS2_I(inode)->ip_clusters; | |
1036 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
1037 | ||
1038 | mlog(0, "Writing at EOF, may need more allocation: " | |
215c7f9f MF |
1039 | "i_size = %lld, newsize = %lld, need %u clusters\n", |
1040 | (long long) i_size_read(inode), (long long) newsize, | |
1041 | clusters); | |
ccd979bd MF |
1042 | |
1043 | /* We only want to continue the rest of this loop if | |
1044 | * our extend will actually require more | |
1045 | * allocation. */ | |
1046 | if (!clusters) | |
1047 | break; | |
1048 | ||
1049 | ret = ocfs2_extend_allocation(inode, clusters); | |
1050 | if (ret < 0) { | |
1051 | if (ret != -ENOSPC) | |
1052 | mlog_errno(ret); | |
1053 | goto out; | |
1054 | } | |
1055 | ||
1056 | /* Fill any holes which would've been created by this | |
1057 | * write. If we're O_APPEND, this will wind up | |
1058 | * (correctly) being a noop. */ | |
1059 | ret = ocfs2_zero_extend(inode, (u64) newsize - count); | |
1060 | if (ret < 0) { | |
1061 | mlog_errno(ret); | |
1062 | goto out; | |
1063 | } | |
1064 | break; | |
1065 | } | |
1066 | ||
1067 | /* ok, we're done with i_size and alloc work */ | |
1068 | iocb->ki_pos = saved_pos; | |
1069 | ocfs2_meta_unlock(inode, meta_level); | |
1070 | meta_level = -1; | |
1071 | ||
1072 | /* communicate with ocfs2_dio_end_io */ | |
1073 | ocfs2_iocb_set_rw_locked(iocb); | |
1074 | ||
d267a56c | 1075 | ret = generic_file_aio_write_nolock(iocb, &local_iov, 1, &iocb->ki_pos); |
ccd979bd MF |
1076 | |
1077 | /* buffered aio wouldn't have proper lock coverage today */ | |
1078 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); | |
1079 | ||
1080 | /* | |
1081 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io | |
1082 | * function pointer which is called when o_direct io completes so that | |
1083 | * it can unlock our rw lock. (it's the clustered equivalent of | |
1084 | * i_alloc_sem; protects truncate from racing with pending ios). | |
1085 | * Unfortunately there are error cases which call end_io and others | |
1086 | * that don't. so we don't have to unlock the rw_lock if either an | |
1087 | * async dio is going to do it in the future or an end_io after an | |
1088 | * error has already done it. | |
1089 | */ | |
1090 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { | |
1091 | rw_level = -1; | |
1092 | have_alloc_sem = 0; | |
1093 | } | |
1094 | ||
1095 | out: | |
1096 | if (meta_level != -1) | |
1097 | ocfs2_meta_unlock(inode, meta_level); | |
1098 | if (have_alloc_sem) | |
1099 | up_read(&inode->i_alloc_sem); | |
1100 | if (rw_level != -1) | |
1101 | ocfs2_rw_unlock(inode, rw_level); | |
1b1dcc1b | 1102 | mutex_unlock(&inode->i_mutex); |
ccd979bd MF |
1103 | |
1104 | mlog_exit(ret); | |
1105 | return ret; | |
1106 | } | |
1107 | ||
1108 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, | |
1109 | char __user *buf, | |
1110 | size_t count, | |
1111 | loff_t pos) | |
1112 | { | |
1113 | int ret = 0, rw_level = -1, have_alloc_sem = 0; | |
1114 | struct file *filp = iocb->ki_filp; | |
1115 | struct inode *inode = filp->f_dentry->d_inode; | |
ccd979bd MF |
1116 | |
1117 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", filp, buf, | |
1118 | (unsigned int)count, | |
1119 | filp->f_dentry->d_name.len, | |
1120 | filp->f_dentry->d_name.name); | |
1121 | ||
1122 | if (!inode) { | |
1123 | ret = -EINVAL; | |
1124 | mlog_errno(ret); | |
1125 | goto bail; | |
1126 | } | |
1127 | ||
ccd979bd MF |
1128 | /* |
1129 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads | |
1130 | * need locks to protect pending reads from racing with truncate. | |
1131 | */ | |
1132 | if (filp->f_flags & O_DIRECT) { | |
1133 | down_read(&inode->i_alloc_sem); | |
1134 | have_alloc_sem = 1; | |
1135 | ||
1136 | ret = ocfs2_rw_lock(inode, 0); | |
1137 | if (ret < 0) { | |
1138 | mlog_errno(ret); | |
1139 | goto bail; | |
1140 | } | |
1141 | rw_level = 0; | |
1142 | /* communicate with ocfs2_dio_end_io */ | |
1143 | ocfs2_iocb_set_rw_locked(iocb); | |
1144 | } | |
1145 | ||
1146 | ret = generic_file_aio_read(iocb, buf, count, iocb->ki_pos); | |
1147 | if (ret == -EINVAL) | |
1148 | mlog(ML_ERROR, "generic_file_aio_read returned -EINVAL\n"); | |
1149 | ||
1150 | /* buffered aio wouldn't have proper lock coverage today */ | |
1151 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); | |
1152 | ||
1153 | /* see ocfs2_file_aio_write */ | |
1154 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { | |
1155 | rw_level = -1; | |
1156 | have_alloc_sem = 0; | |
1157 | } | |
1158 | ||
1159 | bail: | |
1160 | if (have_alloc_sem) | |
1161 | up_read(&inode->i_alloc_sem); | |
1162 | if (rw_level != -1) | |
1163 | ocfs2_rw_unlock(inode, rw_level); | |
1164 | mlog_exit(ret); | |
1165 | ||
1166 | return ret; | |
1167 | } | |
1168 | ||
1169 | struct inode_operations ocfs2_file_iops = { | |
1170 | .setattr = ocfs2_setattr, | |
1171 | .getattr = ocfs2_getattr, | |
1172 | }; | |
1173 | ||
1174 | struct inode_operations ocfs2_special_file_iops = { | |
1175 | .setattr = ocfs2_setattr, | |
1176 | .getattr = ocfs2_getattr, | |
1177 | }; | |
1178 | ||
1179 | struct file_operations ocfs2_fops = { | |
1180 | .read = do_sync_read, | |
1181 | .write = do_sync_write, | |
1182 | .sendfile = generic_file_sendfile, | |
1183 | .mmap = ocfs2_mmap, | |
1184 | .fsync = ocfs2_sync_file, | |
1185 | .release = ocfs2_file_release, | |
1186 | .open = ocfs2_file_open, | |
1187 | .aio_read = ocfs2_file_aio_read, | |
1188 | .aio_write = ocfs2_file_aio_write, | |
1189 | }; | |
1190 | ||
1191 | struct file_operations ocfs2_dops = { | |
1192 | .read = generic_read_dir, | |
1193 | .readdir = ocfs2_readdir, | |
1194 | .fsync = ocfs2_sync_file, | |
1195 | }; |