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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> | |
e2057c5a | 33 | #include <linux/sched.h> |
d6b29d7c | 34 | #include <linux/splice.h> |
7f1a37e3 | 35 | #include <linux/mount.h> |
9517bac6 | 36 | #include <linux/writeback.h> |
385820a3 | 37 | #include <linux/falloc.h> |
a90714c1 | 38 | #include <linux/quotaops.h> |
04eda1a1 | 39 | #include <linux/blkdev.h> |
ccd979bd MF |
40 | |
41 | #define MLOG_MASK_PREFIX ML_INODE | |
42 | #include <cluster/masklog.h> | |
43 | ||
44 | #include "ocfs2.h" | |
45 | ||
46 | #include "alloc.h" | |
47 | #include "aops.h" | |
48 | #include "dir.h" | |
49 | #include "dlmglue.h" | |
50 | #include "extent_map.h" | |
51 | #include "file.h" | |
52 | #include "sysfile.h" | |
53 | #include "inode.h" | |
ca4d147e | 54 | #include "ioctl.h" |
ccd979bd | 55 | #include "journal.h" |
53fc622b | 56 | #include "locks.h" |
ccd979bd MF |
57 | #include "mmap.h" |
58 | #include "suballoc.h" | |
59 | #include "super.h" | |
cf1d6c76 | 60 | #include "xattr.h" |
23fc2702 | 61 | #include "acl.h" |
a90714c1 | 62 | #include "quota.h" |
293b2f70 | 63 | #include "refcounttree.h" |
ccd979bd MF |
64 | |
65 | #include "buffer_head_io.h" | |
66 | ||
67 | static int ocfs2_sync_inode(struct inode *inode) | |
68 | { | |
69 | filemap_fdatawrite(inode->i_mapping); | |
70 | return sync_mapping_buffers(inode->i_mapping); | |
71 | } | |
72 | ||
53fc622b MF |
73 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
74 | { | |
75 | struct ocfs2_file_private *fp; | |
76 | ||
77 | fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL); | |
78 | if (!fp) | |
79 | return -ENOMEM; | |
80 | ||
81 | fp->fp_file = file; | |
82 | mutex_init(&fp->fp_mutex); | |
83 | ocfs2_file_lock_res_init(&fp->fp_flock, fp); | |
84 | file->private_data = fp; | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | static void ocfs2_free_file_private(struct inode *inode, struct file *file) | |
90 | { | |
91 | struct ocfs2_file_private *fp = file->private_data; | |
92 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
93 | ||
94 | if (fp) { | |
95 | ocfs2_simple_drop_lockres(osb, &fp->fp_flock); | |
96 | ocfs2_lock_res_free(&fp->fp_flock); | |
97 | kfree(fp); | |
98 | file->private_data = NULL; | |
99 | } | |
100 | } | |
101 | ||
ccd979bd MF |
102 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
103 | { | |
104 | int status; | |
105 | int mode = file->f_flags; | |
106 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
107 | ||
108 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, | |
d28c9174 | 109 | file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name); |
ccd979bd | 110 | |
907f4554 | 111 | if (file->f_mode & FMODE_WRITE) |
871a2931 | 112 | dquot_initialize(inode); |
907f4554 | 113 | |
ccd979bd MF |
114 | spin_lock(&oi->ip_lock); |
115 | ||
116 | /* Check that the inode hasn't been wiped from disk by another | |
117 | * node. If it hasn't then we're safe as long as we hold the | |
118 | * spin lock until our increment of open count. */ | |
119 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { | |
120 | spin_unlock(&oi->ip_lock); | |
121 | ||
122 | status = -ENOENT; | |
123 | goto leave; | |
124 | } | |
125 | ||
126 | if (mode & O_DIRECT) | |
127 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; | |
128 | ||
129 | oi->ip_open_count++; | |
130 | spin_unlock(&oi->ip_lock); | |
53fc622b MF |
131 | |
132 | status = ocfs2_init_file_private(inode, file); | |
133 | if (status) { | |
134 | /* | |
135 | * We want to set open count back if we're failing the | |
136 | * open. | |
137 | */ | |
138 | spin_lock(&oi->ip_lock); | |
139 | oi->ip_open_count--; | |
140 | spin_unlock(&oi->ip_lock); | |
141 | } | |
142 | ||
ccd979bd MF |
143 | leave: |
144 | mlog_exit(status); | |
145 | return status; | |
146 | } | |
147 | ||
148 | static int ocfs2_file_release(struct inode *inode, struct file *file) | |
149 | { | |
150 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
151 | ||
152 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, | |
d28c9174 JS |
153 | file->f_path.dentry->d_name.len, |
154 | file->f_path.dentry->d_name.name); | |
ccd979bd MF |
155 | |
156 | spin_lock(&oi->ip_lock); | |
157 | if (!--oi->ip_open_count) | |
158 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; | |
159 | spin_unlock(&oi->ip_lock); | |
160 | ||
53fc622b MF |
161 | ocfs2_free_file_private(inode, file); |
162 | ||
ccd979bd MF |
163 | mlog_exit(0); |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
53fc622b MF |
168 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
169 | { | |
170 | return ocfs2_init_file_private(inode, file); | |
171 | } | |
172 | ||
173 | static int ocfs2_dir_release(struct inode *inode, struct file *file) | |
174 | { | |
175 | ocfs2_free_file_private(inode, file); | |
176 | return 0; | |
177 | } | |
178 | ||
7ea80859 | 179 | static int ocfs2_sync_file(struct file *file, int datasync) |
ccd979bd MF |
180 | { |
181 | int err = 0; | |
182 | journal_t *journal; | |
7ea80859 CH |
183 | struct dentry *dentry = file->f_path.dentry; |
184 | struct inode *inode = file->f_mapping->host; | |
ccd979bd MF |
185 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
186 | ||
187 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync, | |
188 | dentry->d_name.len, dentry->d_name.name); | |
189 | ||
190 | err = ocfs2_sync_inode(dentry->d_inode); | |
191 | if (err) | |
192 | goto bail; | |
193 | ||
04eda1a1 JK |
194 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) { |
195 | /* | |
196 | * We still have to flush drive's caches to get data to the | |
197 | * platter | |
198 | */ | |
199 | if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) | |
200 | blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, | |
201 | NULL, BLKDEV_IFL_WAIT); | |
e04cc15f | 202 | goto bail; |
04eda1a1 | 203 | } |
e04cc15f | 204 | |
ccd979bd | 205 | journal = osb->journal->j_journal; |
2b4e30fb | 206 | err = jbd2_journal_force_commit(journal); |
ccd979bd MF |
207 | |
208 | bail: | |
209 | mlog_exit(err); | |
210 | ||
211 | return (err < 0) ? -EIO : 0; | |
212 | } | |
213 | ||
7f1a37e3 TY |
214 | int ocfs2_should_update_atime(struct inode *inode, |
215 | struct vfsmount *vfsmnt) | |
216 | { | |
217 | struct timespec now; | |
218 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
219 | ||
220 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
221 | return 0; | |
222 | ||
223 | if ((inode->i_flags & S_NOATIME) || | |
224 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
225 | return 0; | |
226 | ||
6c2aad05 MF |
227 | /* |
228 | * We can be called with no vfsmnt structure - NFSD will | |
229 | * sometimes do this. | |
230 | * | |
231 | * Note that our action here is different than touch_atime() - | |
232 | * if we can't tell whether this is a noatime mount, then we | |
233 | * don't know whether to trust the value of s_atime_quantum. | |
234 | */ | |
235 | if (vfsmnt == NULL) | |
236 | return 0; | |
237 | ||
7f1a37e3 TY |
238 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
239 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
240 | return 0; | |
241 | ||
7e913c53 MF |
242 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
243 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || | |
244 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) | |
245 | return 1; | |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
7f1a37e3 TY |
250 | now = CURRENT_TIME; |
251 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) | |
252 | return 0; | |
253 | else | |
254 | return 1; | |
255 | } | |
256 | ||
257 | int ocfs2_update_inode_atime(struct inode *inode, | |
258 | struct buffer_head *bh) | |
259 | { | |
260 | int ret; | |
261 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
262 | handle_t *handle; | |
c11e9faf | 263 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
7f1a37e3 TY |
264 | |
265 | mlog_entry_void(); | |
266 | ||
267 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
268 | if (IS_ERR(handle)) { |
269 | ret = PTR_ERR(handle); | |
7f1a37e3 TY |
270 | mlog_errno(ret); |
271 | goto out; | |
272 | } | |
273 | ||
0cf2f763 | 274 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 275 | OCFS2_JOURNAL_ACCESS_WRITE); |
c11e9faf MF |
276 | if (ret) { |
277 | mlog_errno(ret); | |
278 | goto out_commit; | |
279 | } | |
280 | ||
281 | /* | |
282 | * Don't use ocfs2_mark_inode_dirty() here as we don't always | |
283 | * have i_mutex to guard against concurrent changes to other | |
284 | * inode fields. | |
285 | */ | |
7f1a37e3 | 286 | inode->i_atime = CURRENT_TIME; |
c11e9faf MF |
287 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
288 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); | |
ec20cec7 | 289 | ocfs2_journal_dirty(handle, bh); |
7f1a37e3 | 290 | |
c11e9faf | 291 | out_commit: |
7f1a37e3 TY |
292 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
293 | out: | |
294 | mlog_exit(ret); | |
295 | return ret; | |
296 | } | |
297 | ||
6cb129f5 AB |
298 | static int ocfs2_set_inode_size(handle_t *handle, |
299 | struct inode *inode, | |
300 | struct buffer_head *fe_bh, | |
301 | u64 new_i_size) | |
ccd979bd MF |
302 | { |
303 | int status; | |
304 | ||
305 | mlog_entry_void(); | |
306 | i_size_write(inode, new_i_size); | |
8110b073 | 307 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
308 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
309 | ||
310 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
311 | if (status < 0) { | |
312 | mlog_errno(status); | |
313 | goto bail; | |
314 | } | |
315 | ||
316 | bail: | |
317 | mlog_exit(status); | |
318 | return status; | |
319 | } | |
320 | ||
9e33d69f JK |
321 | int ocfs2_simple_size_update(struct inode *inode, |
322 | struct buffer_head *di_bh, | |
323 | u64 new_i_size) | |
ccd979bd MF |
324 | { |
325 | int ret; | |
326 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 327 | handle_t *handle = NULL; |
ccd979bd | 328 | |
65eff9cc | 329 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
330 | if (IS_ERR(handle)) { |
331 | ret = PTR_ERR(handle); | |
ccd979bd MF |
332 | mlog_errno(ret); |
333 | goto out; | |
334 | } | |
335 | ||
336 | ret = ocfs2_set_inode_size(handle, inode, di_bh, | |
337 | new_i_size); | |
338 | if (ret < 0) | |
339 | mlog_errno(ret); | |
340 | ||
02dc1af4 | 341 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
342 | out: |
343 | return ret; | |
344 | } | |
345 | ||
37f8a2bf TM |
346 | static int ocfs2_cow_file_pos(struct inode *inode, |
347 | struct buffer_head *fe_bh, | |
348 | u64 offset) | |
349 | { | |
350 | int status; | |
351 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
352 | unsigned int num_clusters = 0; | |
353 | unsigned int ext_flags = 0; | |
354 | ||
355 | /* | |
356 | * If the new offset is aligned to the range of the cluster, there is | |
357 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to | |
358 | * CoW either. | |
359 | */ | |
360 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) | |
361 | return 0; | |
362 | ||
363 | status = ocfs2_get_clusters(inode, cpos, &phys, | |
364 | &num_clusters, &ext_flags); | |
365 | if (status) { | |
366 | mlog_errno(status); | |
367 | goto out; | |
368 | } | |
369 | ||
370 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
371 | goto out; | |
372 | ||
373 | return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1); | |
374 | ||
375 | out: | |
376 | return status; | |
377 | } | |
378 | ||
ccd979bd MF |
379 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
380 | struct inode *inode, | |
381 | struct buffer_head *fe_bh, | |
382 | u64 new_i_size) | |
383 | { | |
384 | int status; | |
1fabe148 | 385 | handle_t *handle; |
60b11392 | 386 | struct ocfs2_dinode *di; |
35edec1d | 387 | u64 cluster_bytes; |
ccd979bd MF |
388 | |
389 | mlog_entry_void(); | |
390 | ||
37f8a2bf TM |
391 | /* |
392 | * We need to CoW the cluster contains the offset if it is reflinked | |
393 | * since we will call ocfs2_zero_range_for_truncate later which will | |
394 | * write "0" from offset to the end of the cluster. | |
395 | */ | |
396 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); | |
397 | if (status) { | |
398 | mlog_errno(status); | |
399 | return status; | |
400 | } | |
401 | ||
ccd979bd MF |
402 | /* TODO: This needs to actually orphan the inode in this |
403 | * transaction. */ | |
404 | ||
65eff9cc | 405 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ccd979bd MF |
406 | if (IS_ERR(handle)) { |
407 | status = PTR_ERR(handle); | |
408 | mlog_errno(status); | |
409 | goto out; | |
410 | } | |
411 | ||
0cf2f763 | 412 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
13723d00 | 413 | OCFS2_JOURNAL_ACCESS_WRITE); |
60b11392 MF |
414 | if (status < 0) { |
415 | mlog_errno(status); | |
416 | goto out_commit; | |
417 | } | |
418 | ||
419 | /* | |
420 | * Do this before setting i_size. | |
421 | */ | |
35edec1d MF |
422 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
423 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, | |
424 | cluster_bytes); | |
60b11392 MF |
425 | if (status) { |
426 | mlog_errno(status); | |
427 | goto out_commit; | |
428 | } | |
429 | ||
430 | i_size_write(inode, new_i_size); | |
60b11392 MF |
431 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
432 | ||
433 | di = (struct ocfs2_dinode *) fe_bh->b_data; | |
434 | di->i_size = cpu_to_le64(new_i_size); | |
435 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); | |
436 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
437 | ||
ec20cec7 | 438 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 439 | |
60b11392 | 440 | out_commit: |
02dc1af4 | 441 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 442 | out: |
60b11392 | 443 | |
ccd979bd MF |
444 | mlog_exit(status); |
445 | return status; | |
446 | } | |
447 | ||
448 | static int ocfs2_truncate_file(struct inode *inode, | |
449 | struct buffer_head *di_bh, | |
450 | u64 new_i_size) | |
451 | { | |
452 | int status = 0; | |
453 | struct ocfs2_dinode *fe = NULL; | |
454 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
ccd979bd | 455 | |
b0697053 MF |
456 | mlog_entry("(inode = %llu, new_i_size = %llu\n", |
457 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
458 | (unsigned long long)new_i_size); | |
ccd979bd | 459 | |
b657c95c JB |
460 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
461 | * already validated it */ | |
ccd979bd | 462 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
ccd979bd MF |
463 | |
464 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), | |
b0697053 MF |
465 | "Inode %llu, inode i_size = %lld != di " |
466 | "i_size = %llu, i_flags = 0x%x\n", | |
467 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ccd979bd | 468 | i_size_read(inode), |
b0697053 MF |
469 | (unsigned long long)le64_to_cpu(fe->i_size), |
470 | le32_to_cpu(fe->i_flags)); | |
ccd979bd MF |
471 | |
472 | if (new_i_size > le64_to_cpu(fe->i_size)) { | |
b0697053 MF |
473 | mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", |
474 | (unsigned long long)le64_to_cpu(fe->i_size), | |
475 | (unsigned long long)new_i_size); | |
ccd979bd MF |
476 | status = -EINVAL; |
477 | mlog_errno(status); | |
478 | goto bail; | |
479 | } | |
480 | ||
b0697053 MF |
481 | mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", |
482 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
483 | (unsigned long long)le64_to_cpu(fe->i_size), | |
484 | (unsigned long long)new_i_size); | |
ccd979bd MF |
485 | |
486 | /* lets handle the simple truncate cases before doing any more | |
487 | * cluster locking. */ | |
488 | if (new_i_size == le64_to_cpu(fe->i_size)) | |
489 | goto bail; | |
490 | ||
2e89b2e4 MF |
491 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
492 | ||
4fe370af MF |
493 | ocfs2_resv_discard(&osb->osb_la_resmap, |
494 | &OCFS2_I(inode)->ip_la_data_resv); | |
495 | ||
c934a92d MF |
496 | /* |
497 | * The inode lock forced other nodes to sync and drop their | |
498 | * pages, which (correctly) happens even if we have a truncate | |
499 | * without allocation change - ocfs2 cluster sizes can be much | |
500 | * greater than page size, so we have to truncate them | |
501 | * anyway. | |
502 | */ | |
2e89b2e4 MF |
503 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
504 | truncate_inode_pages(inode->i_mapping, new_i_size); | |
505 | ||
1afc32b9 MF |
506 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
507 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, | |
b1967d0e | 508 | i_size_read(inode), 1); |
1afc32b9 MF |
509 | if (status) |
510 | mlog_errno(status); | |
511 | ||
c934a92d | 512 | goto bail_unlock_sem; |
1afc32b9 MF |
513 | } |
514 | ||
ccd979bd MF |
515 | /* alright, we're going to need to do a full blown alloc size |
516 | * change. Orphan the inode so that recovery can complete the | |
517 | * truncate if necessary. This does the task of marking | |
518 | * i_size. */ | |
519 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); | |
520 | if (status < 0) { | |
521 | mlog_errno(status); | |
c934a92d | 522 | goto bail_unlock_sem; |
ccd979bd MF |
523 | } |
524 | ||
78f94673 | 525 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
ccd979bd MF |
526 | if (status < 0) { |
527 | mlog_errno(status); | |
c934a92d | 528 | goto bail_unlock_sem; |
ccd979bd MF |
529 | } |
530 | ||
531 | /* TODO: orphan dir cleanup here. */ | |
c934a92d | 532 | bail_unlock_sem: |
2e89b2e4 MF |
533 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
534 | ||
ccd979bd | 535 | bail: |
8b2c0dba TM |
536 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
537 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
ccd979bd MF |
538 | |
539 | mlog_exit(status); | |
540 | return status; | |
541 | } | |
542 | ||
543 | /* | |
0eb8d47e | 544 | * extend file allocation only here. |
ccd979bd MF |
545 | * we'll update all the disk stuff, and oip->alloc_size |
546 | * | |
547 | * expect stuff to be locked, a transaction started and enough data / | |
548 | * metadata reservations in the contexts. | |
549 | * | |
550 | * Will return -EAGAIN, and a reason if a restart is needed. | |
551 | * If passed in, *reason will always be set, even in error. | |
552 | */ | |
0eb8d47e TM |
553 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
554 | struct inode *inode, | |
555 | u32 *logical_offset, | |
556 | u32 clusters_to_add, | |
557 | int mark_unwritten, | |
558 | struct buffer_head *fe_bh, | |
559 | handle_t *handle, | |
560 | struct ocfs2_alloc_context *data_ac, | |
561 | struct ocfs2_alloc_context *meta_ac, | |
562 | enum ocfs2_alloc_restarted *reason_ret) | |
ccd979bd | 563 | { |
f99b9b7c JB |
564 | int ret; |
565 | struct ocfs2_extent_tree et; | |
ccd979bd | 566 | |
5e404e9e | 567 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
cbee7e1a JB |
568 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
569 | clusters_to_add, mark_unwritten, | |
570 | data_ac, meta_ac, reason_ret); | |
f99b9b7c JB |
571 | |
572 | return ret; | |
ccd979bd MF |
573 | } |
574 | ||
2ae99a60 MF |
575 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
576 | u32 clusters_to_add, int mark_unwritten) | |
ccd979bd MF |
577 | { |
578 | int status = 0; | |
579 | int restart_func = 0; | |
abf8b156 | 580 | int credits; |
2ae99a60 | 581 | u32 prev_clusters; |
ccd979bd MF |
582 | struct buffer_head *bh = NULL; |
583 | struct ocfs2_dinode *fe = NULL; | |
1fabe148 | 584 | handle_t *handle = NULL; |
ccd979bd MF |
585 | struct ocfs2_alloc_context *data_ac = NULL; |
586 | struct ocfs2_alloc_context *meta_ac = NULL; | |
587 | enum ocfs2_alloc_restarted why; | |
588 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 589 | struct ocfs2_extent_tree et; |
a90714c1 | 590 | int did_quota = 0; |
ccd979bd MF |
591 | |
592 | mlog_entry("(clusters_to_add = %u)\n", clusters_to_add); | |
593 | ||
dcd0538f MF |
594 | /* |
595 | * This function only exists for file systems which don't | |
596 | * support holes. | |
597 | */ | |
2ae99a60 | 598 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
dcd0538f | 599 | |
b657c95c | 600 | status = ocfs2_read_inode_block(inode, &bh); |
ccd979bd MF |
601 | if (status < 0) { |
602 | mlog_errno(status); | |
603 | goto leave; | |
604 | } | |
ccd979bd | 605 | fe = (struct ocfs2_dinode *) bh->b_data; |
ccd979bd MF |
606 | |
607 | restart_all: | |
608 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); | |
609 | ||
e7d4cb6b TM |
610 | mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, " |
611 | "clusters_to_add = %u\n", | |
612 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
613 | (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters), | |
614 | clusters_to_add); | |
5e404e9e | 615 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
f99b9b7c JB |
616 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
617 | &data_ac, &meta_ac); | |
9517bac6 MF |
618 | if (status) { |
619 | mlog_errno(status); | |
620 | goto leave; | |
621 | } | |
622 | ||
811f933d TM |
623 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list, |
624 | clusters_to_add); | |
65eff9cc | 625 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
626 | if (IS_ERR(handle)) { |
627 | status = PTR_ERR(handle); | |
628 | handle = NULL; | |
629 | mlog_errno(status); | |
630 | goto leave; | |
631 | } | |
632 | ||
633 | restarted_transaction: | |
5dd4056d CH |
634 | status = dquot_alloc_space_nodirty(inode, |
635 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); | |
636 | if (status) | |
a90714c1 | 637 | goto leave; |
a90714c1 JK |
638 | did_quota = 1; |
639 | ||
ccd979bd MF |
640 | /* reserve a write to the file entry early on - that we if we |
641 | * run out of credits in the allocation path, we can still | |
642 | * update i_size. */ | |
0cf2f763 | 643 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 644 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
645 | if (status < 0) { |
646 | mlog_errno(status); | |
647 | goto leave; | |
648 | } | |
649 | ||
650 | prev_clusters = OCFS2_I(inode)->ip_clusters; | |
651 | ||
0eb8d47e TM |
652 | status = ocfs2_add_inode_data(osb, |
653 | inode, | |
654 | &logical_start, | |
655 | clusters_to_add, | |
656 | mark_unwritten, | |
657 | bh, | |
658 | handle, | |
659 | data_ac, | |
660 | meta_ac, | |
661 | &why); | |
ccd979bd MF |
662 | if ((status < 0) && (status != -EAGAIN)) { |
663 | if (status != -ENOSPC) | |
664 | mlog_errno(status); | |
665 | goto leave; | |
666 | } | |
667 | ||
ec20cec7 | 668 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
669 | |
670 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
671 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); | |
672 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
a90714c1 | 673 | /* Release unused quota reservation */ |
5dd4056d | 674 | dquot_free_space(inode, |
a90714c1 JK |
675 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
676 | did_quota = 0; | |
ccd979bd MF |
677 | |
678 | if (why != RESTART_NONE && clusters_to_add) { | |
679 | if (why == RESTART_META) { | |
680 | mlog(0, "restarting function.\n"); | |
681 | restart_func = 1; | |
79681842 | 682 | status = 0; |
ccd979bd MF |
683 | } else { |
684 | BUG_ON(why != RESTART_TRANS); | |
685 | ||
686 | mlog(0, "restarting transaction.\n"); | |
687 | /* TODO: This can be more intelligent. */ | |
688 | credits = ocfs2_calc_extend_credits(osb->sb, | |
811f933d | 689 | &fe->id2.i_list, |
ccd979bd | 690 | clusters_to_add); |
1fabe148 | 691 | status = ocfs2_extend_trans(handle, credits); |
ccd979bd MF |
692 | if (status < 0) { |
693 | /* handle still has to be committed at | |
694 | * this point. */ | |
695 | status = -ENOMEM; | |
696 | mlog_errno(status); | |
697 | goto leave; | |
698 | } | |
699 | goto restarted_transaction; | |
700 | } | |
701 | } | |
702 | ||
b0697053 | 703 | mlog(0, "fe: i_clusters = %u, i_size=%llu\n", |
1ca1a111 MF |
704 | le32_to_cpu(fe->i_clusters), |
705 | (unsigned long long)le64_to_cpu(fe->i_size)); | |
ccd979bd | 706 | mlog(0, "inode: ip_clusters=%u, i_size=%lld\n", |
634bf74d | 707 | OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode)); |
ccd979bd MF |
708 | |
709 | leave: | |
a90714c1 | 710 | if (status < 0 && did_quota) |
5dd4056d | 711 | dquot_free_space(inode, |
a90714c1 | 712 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
ccd979bd | 713 | if (handle) { |
02dc1af4 | 714 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
715 | handle = NULL; |
716 | } | |
717 | if (data_ac) { | |
718 | ocfs2_free_alloc_context(data_ac); | |
719 | data_ac = NULL; | |
720 | } | |
721 | if (meta_ac) { | |
722 | ocfs2_free_alloc_context(meta_ac); | |
723 | meta_ac = NULL; | |
724 | } | |
725 | if ((!status) && restart_func) { | |
726 | restart_func = 0; | |
727 | goto restart_all; | |
728 | } | |
a81cb88b MF |
729 | brelse(bh); |
730 | bh = NULL; | |
ccd979bd MF |
731 | |
732 | mlog_exit(status); | |
733 | return status; | |
734 | } | |
735 | ||
a4bfb4cf JB |
736 | /* |
737 | * While a write will already be ordering the data, a truncate will not. | |
738 | * Thus, we need to explicitly order the zeroed pages. | |
739 | */ | |
740 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode) | |
741 | { | |
742 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
743 | handle_t *handle = NULL; | |
744 | int ret = 0; | |
745 | ||
746 | if (!ocfs2_should_order_data(inode)) | |
747 | goto out; | |
748 | ||
749 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
750 | if (IS_ERR(handle)) { | |
751 | ret = -ENOMEM; | |
752 | mlog_errno(ret); | |
753 | goto out; | |
754 | } | |
755 | ||
756 | ret = ocfs2_jbd2_file_inode(handle, inode); | |
757 | if (ret < 0) | |
758 | mlog_errno(ret); | |
759 | ||
760 | out: | |
761 | if (ret) { | |
762 | if (!IS_ERR(handle)) | |
763 | ocfs2_commit_trans(osb, handle); | |
764 | handle = ERR_PTR(ret); | |
765 | } | |
766 | return handle; | |
767 | } | |
768 | ||
ccd979bd MF |
769 | /* Some parts of this taken from generic_cont_expand, which turned out |
770 | * to be too fragile to do exactly what we need without us having to | |
4e02ed4b | 771 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
a4bfb4cf JB |
772 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
773 | u64 abs_to) | |
ccd979bd MF |
774 | { |
775 | struct address_space *mapping = inode->i_mapping; | |
776 | struct page *page; | |
a4bfb4cf | 777 | unsigned long index = abs_from >> PAGE_CACHE_SHIFT; |
1fabe148 | 778 | handle_t *handle = NULL; |
5453258d | 779 | int ret = 0; |
a4bfb4cf | 780 | unsigned zero_from, zero_to, block_start, block_end; |
ccd979bd | 781 | |
a4bfb4cf JB |
782 | BUG_ON(abs_from >= abs_to); |
783 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT)); | |
784 | BUG_ON(abs_from & (inode->i_blkbits - 1)); | |
ccd979bd | 785 | |
9b4c0ff3 | 786 | page = find_or_create_page(mapping, index, GFP_NOFS); |
ccd979bd MF |
787 | if (!page) { |
788 | ret = -ENOMEM; | |
789 | mlog_errno(ret); | |
790 | goto out; | |
791 | } | |
792 | ||
a4bfb4cf JB |
793 | /* Get the offsets within the page that we want to zero */ |
794 | zero_from = abs_from & (PAGE_CACHE_SIZE - 1); | |
795 | zero_to = abs_to & (PAGE_CACHE_SIZE - 1); | |
796 | if (!zero_to) | |
797 | zero_to = PAGE_CACHE_SIZE; | |
ccd979bd | 798 | |
5693486b JB |
799 | mlog(0, |
800 | "abs_from = %llu, abs_to = %llu, index = %lu, zero_from = %u, zero_to = %u\n", | |
801 | (unsigned long long)abs_from, (unsigned long long)abs_to, | |
802 | index, zero_from, zero_to); | |
803 | ||
a4bfb4cf JB |
804 | /* We know that zero_from is block aligned */ |
805 | for (block_start = zero_from; block_start < zero_to; | |
806 | block_start = block_end) { | |
807 | block_end = block_start + (1 << inode->i_blkbits); | |
808 | ||
809 | /* | |
810 | * block_start is block-aligned. Bump it by one to | |
811 | * force ocfs2_{prepare,commit}_write() to zero the | |
812 | * whole block. | |
813 | */ | |
814 | ret = ocfs2_prepare_write_nolock(inode, page, | |
815 | block_start + 1, | |
816 | block_start + 1); | |
817 | if (ret < 0) { | |
818 | mlog_errno(ret); | |
ccd979bd MF |
819 | goto out_unlock; |
820 | } | |
ccd979bd | 821 | |
a4bfb4cf JB |
822 | if (!handle) { |
823 | handle = ocfs2_zero_start_ordered_transaction(inode); | |
824 | if (IS_ERR(handle)) { | |
825 | ret = PTR_ERR(handle); | |
826 | handle = NULL; | |
827 | break; | |
828 | } | |
829 | } | |
830 | ||
831 | /* must not update i_size! */ | |
832 | ret = block_commit_write(page, block_start + 1, | |
833 | block_start + 1); | |
834 | if (ret < 0) | |
835 | mlog_errno(ret); | |
836 | else | |
837 | ret = 0; | |
838 | } | |
ccd979bd MF |
839 | |
840 | if (handle) | |
02dc1af4 | 841 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
a4bfb4cf | 842 | |
ccd979bd MF |
843 | out_unlock: |
844 | unlock_page(page); | |
845 | page_cache_release(page); | |
846 | out: | |
847 | return ret; | |
848 | } | |
849 | ||
5693486b JB |
850 | /* |
851 | * Find the next range to zero. We do this in terms of bytes because | |
852 | * that's what ocfs2_zero_extend() wants, and it is dealing with the | |
853 | * pagecache. We may return multiple extents. | |
854 | * | |
855 | * zero_start and zero_end are ocfs2_zero_extend()s current idea of what | |
856 | * needs to be zeroed. range_start and range_end return the next zeroing | |
857 | * range. A subsequent call should pass the previous range_end as its | |
858 | * zero_start. If range_end is 0, there's nothing to do. | |
859 | * | |
860 | * Unwritten extents are skipped over. Refcounted extents are CoWd. | |
861 | */ | |
862 | static int ocfs2_zero_extend_get_range(struct inode *inode, | |
863 | struct buffer_head *di_bh, | |
864 | u64 zero_start, u64 zero_end, | |
865 | u64 *range_start, u64 *range_end) | |
ccd979bd | 866 | { |
5693486b JB |
867 | int rc = 0, needs_cow = 0; |
868 | u32 p_cpos, zero_clusters = 0; | |
869 | u32 zero_cpos = | |
870 | zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
871 | u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end); | |
872 | unsigned int num_clusters = 0; | |
873 | unsigned int ext_flags = 0; | |
ccd979bd | 874 | |
5693486b JB |
875 | while (zero_cpos < last_cpos) { |
876 | rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos, | |
877 | &num_clusters, &ext_flags); | |
878 | if (rc) { | |
879 | mlog_errno(rc); | |
ccd979bd MF |
880 | goto out; |
881 | } | |
882 | ||
5693486b JB |
883 | if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) { |
884 | zero_clusters = num_clusters; | |
885 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
886 | needs_cow = 1; | |
887 | break; | |
888 | } | |
889 | ||
890 | zero_cpos += num_clusters; | |
891 | } | |
892 | if (!zero_clusters) { | |
893 | *range_end = 0; | |
894 | goto out; | |
895 | } | |
896 | ||
897 | while ((zero_cpos + zero_clusters) < last_cpos) { | |
898 | rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters, | |
899 | &p_cpos, &num_clusters, | |
900 | &ext_flags); | |
901 | if (rc) { | |
902 | mlog_errno(rc); | |
903 | goto out; | |
904 | } | |
905 | ||
906 | if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN)) | |
907 | break; | |
908 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
909 | needs_cow = 1; | |
910 | zero_clusters += num_clusters; | |
911 | } | |
912 | if ((zero_cpos + zero_clusters) > last_cpos) | |
913 | zero_clusters = last_cpos - zero_cpos; | |
914 | ||
915 | if (needs_cow) { | |
916 | rc = ocfs2_refcount_cow(inode, di_bh, zero_cpos, zero_clusters, | |
917 | UINT_MAX); | |
918 | if (rc) { | |
919 | mlog_errno(rc); | |
920 | goto out; | |
921 | } | |
922 | } | |
923 | ||
924 | *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos); | |
925 | *range_end = ocfs2_clusters_to_bytes(inode->i_sb, | |
926 | zero_cpos + zero_clusters); | |
927 | ||
928 | out: | |
929 | return rc; | |
930 | } | |
931 | ||
932 | /* | |
933 | * Zero one range returned from ocfs2_zero_extend_get_range(). The caller | |
934 | * has made sure that the entire range needs zeroing. | |
935 | */ | |
936 | static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start, | |
937 | u64 range_end) | |
938 | { | |
939 | int rc = 0; | |
940 | u64 next_pos; | |
941 | u64 zero_pos = range_start; | |
942 | ||
943 | mlog(0, "range_start = %llu, range_end = %llu\n", | |
944 | (unsigned long long)range_start, | |
945 | (unsigned long long)range_end); | |
946 | BUG_ON(range_start >= range_end); | |
947 | ||
948 | while (zero_pos < range_end) { | |
949 | next_pos = (zero_pos & PAGE_CACHE_MASK) + PAGE_CACHE_SIZE; | |
950 | if (next_pos > range_end) | |
951 | next_pos = range_end; | |
952 | rc = ocfs2_write_zero_page(inode, zero_pos, next_pos); | |
953 | if (rc < 0) { | |
954 | mlog_errno(rc); | |
955 | break; | |
956 | } | |
957 | zero_pos = next_pos; | |
e2057c5a MF |
958 | |
959 | /* | |
960 | * Very large extends have the potential to lock up | |
961 | * the cpu for extended periods of time. | |
962 | */ | |
963 | cond_resched(); | |
ccd979bd MF |
964 | } |
965 | ||
5693486b JB |
966 | return rc; |
967 | } | |
968 | ||
969 | int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh, | |
970 | loff_t zero_to_size) | |
971 | { | |
972 | int ret = 0; | |
973 | u64 zero_start, range_start = 0, range_end = 0; | |
974 | struct super_block *sb = inode->i_sb; | |
975 | ||
976 | zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); | |
977 | mlog(0, "zero_start %llu for i_size %llu\n", | |
978 | (unsigned long long)zero_start, | |
979 | (unsigned long long)i_size_read(inode)); | |
980 | while (zero_start < zero_to_size) { | |
981 | ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start, | |
982 | zero_to_size, | |
983 | &range_start, | |
984 | &range_end); | |
985 | if (ret) { | |
986 | mlog_errno(ret); | |
987 | break; | |
988 | } | |
989 | if (!range_end) | |
990 | break; | |
991 | /* Trim the ends */ | |
992 | if (range_start < zero_start) | |
993 | range_start = zero_start; | |
994 | if (range_end > zero_to_size) | |
995 | range_end = zero_to_size; | |
996 | ||
997 | ret = ocfs2_zero_extend_range(inode, range_start, | |
998 | range_end); | |
999 | if (ret) { | |
1000 | mlog_errno(ret); | |
1001 | break; | |
1002 | } | |
1003 | zero_start = range_end; | |
1004 | } | |
1005 | ||
ccd979bd MF |
1006 | return ret; |
1007 | } | |
1008 | ||
5693486b JB |
1009 | int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh, |
1010 | u64 new_i_size, u64 zero_to) | |
65ed39d6 MF |
1011 | { |
1012 | int ret; | |
1013 | u32 clusters_to_add; | |
1014 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1015 | ||
5693486b JB |
1016 | /* |
1017 | * Only quota files call this without a bh, and they can't be | |
1018 | * refcounted. | |
1019 | */ | |
1020 | BUG_ON(!di_bh && (oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); | |
1021 | BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE)); | |
1022 | ||
65ed39d6 MF |
1023 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); |
1024 | if (clusters_to_add < oi->ip_clusters) | |
1025 | clusters_to_add = 0; | |
1026 | else | |
1027 | clusters_to_add -= oi->ip_clusters; | |
1028 | ||
1029 | if (clusters_to_add) { | |
1030 | ret = __ocfs2_extend_allocation(inode, oi->ip_clusters, | |
1031 | clusters_to_add, 0); | |
1032 | if (ret) { | |
1033 | mlog_errno(ret); | |
1034 | goto out; | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | /* | |
1039 | * Call this even if we don't add any clusters to the tree. We | |
1040 | * still need to zero the area between the old i_size and the | |
1041 | * new i_size. | |
1042 | */ | |
5693486b | 1043 | ret = ocfs2_zero_extend(inode, di_bh, zero_to); |
65ed39d6 MF |
1044 | if (ret < 0) |
1045 | mlog_errno(ret); | |
1046 | ||
1047 | out: | |
1048 | return ret; | |
1049 | } | |
1050 | ||
ccd979bd MF |
1051 | static int ocfs2_extend_file(struct inode *inode, |
1052 | struct buffer_head *di_bh, | |
65ed39d6 | 1053 | u64 new_i_size) |
ccd979bd | 1054 | { |
c934a92d | 1055 | int ret = 0; |
1afc32b9 | 1056 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
ccd979bd | 1057 | |
65ed39d6 | 1058 | BUG_ON(!di_bh); |
53013cba | 1059 | |
ccd979bd MF |
1060 | /* setattr sometimes calls us like this. */ |
1061 | if (new_i_size == 0) | |
1062 | goto out; | |
1063 | ||
1064 | if (i_size_read(inode) == new_i_size) | |
5693486b | 1065 | goto out; |
ccd979bd MF |
1066 | BUG_ON(new_i_size < i_size_read(inode)); |
1067 | ||
0effef77 | 1068 | /* |
65ed39d6 MF |
1069 | * The alloc sem blocks people in read/write from reading our |
1070 | * allocation until we're done changing it. We depend on | |
1071 | * i_mutex to block other extend/truncate calls while we're | |
5693486b JB |
1072 | * here. We even have to hold it for sparse files because there |
1073 | * might be some tail zeroing. | |
0effef77 | 1074 | */ |
1afc32b9 MF |
1075 | down_write(&oi->ip_alloc_sem); |
1076 | ||
1077 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1078 | /* | |
1079 | * We can optimize small extends by keeping the inodes | |
1080 | * inline data. | |
1081 | */ | |
1082 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { | |
1083 | up_write(&oi->ip_alloc_sem); | |
1084 | goto out_update_size; | |
1085 | } | |
1086 | ||
1087 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1088 | if (ret) { | |
1089 | up_write(&oi->ip_alloc_sem); | |
1afc32b9 | 1090 | mlog_errno(ret); |
c934a92d | 1091 | goto out; |
1afc32b9 MF |
1092 | } |
1093 | } | |
1094 | ||
5693486b JB |
1095 | if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
1096 | ret = ocfs2_zero_extend(inode, di_bh, new_i_size); | |
1097 | else | |
1098 | ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size, | |
1099 | new_i_size); | |
1afc32b9 MF |
1100 | |
1101 | up_write(&oi->ip_alloc_sem); | |
65ed39d6 | 1102 | |
0effef77 MF |
1103 | if (ret < 0) { |
1104 | mlog_errno(ret); | |
c934a92d | 1105 | goto out; |
53013cba MF |
1106 | } |
1107 | ||
3a0782d0 | 1108 | out_update_size: |
65ed39d6 MF |
1109 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
1110 | if (ret < 0) | |
1111 | mlog_errno(ret); | |
ccd979bd MF |
1112 | |
1113 | out: | |
1114 | return ret; | |
1115 | } | |
1116 | ||
1117 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1118 | { | |
1119 | int status = 0, size_change; | |
1120 | struct inode *inode = dentry->d_inode; | |
1121 | struct super_block *sb = inode->i_sb; | |
1122 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
1123 | struct buffer_head *bh = NULL; | |
1fabe148 | 1124 | handle_t *handle = NULL; |
65bac575 | 1125 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
52a9ee28 | 1126 | int qtype; |
ccd979bd MF |
1127 | |
1128 | mlog_entry("(0x%p, '%.*s')\n", dentry, | |
1129 | dentry->d_name.len, dentry->d_name.name); | |
1130 | ||
bc535809 SM |
1131 | /* ensuring we don't even attempt to truncate a symlink */ |
1132 | if (S_ISLNK(inode->i_mode)) | |
1133 | attr->ia_valid &= ~ATTR_SIZE; | |
1134 | ||
ccd979bd MF |
1135 | if (attr->ia_valid & ATTR_MODE) |
1136 | mlog(0, "mode change: %d\n", attr->ia_mode); | |
1137 | if (attr->ia_valid & ATTR_UID) | |
1138 | mlog(0, "uid change: %d\n", attr->ia_uid); | |
1139 | if (attr->ia_valid & ATTR_GID) | |
1140 | mlog(0, "gid change: %d\n", attr->ia_gid); | |
1141 | if (attr->ia_valid & ATTR_SIZE) | |
1142 | mlog(0, "size change...\n"); | |
1143 | if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME)) | |
1144 | mlog(0, "time change...\n"); | |
1145 | ||
1146 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ | |
1147 | | ATTR_GID | ATTR_UID | ATTR_MODE) | |
1148 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) { | |
1149 | mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid); | |
1150 | return 0; | |
1151 | } | |
1152 | ||
1153 | status = inode_change_ok(inode, attr); | |
1154 | if (status) | |
1155 | return status; | |
1156 | ||
12755627 DM |
1157 | if (is_quota_modification(inode, attr)) |
1158 | dquot_initialize(inode); | |
ccd979bd MF |
1159 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
1160 | if (size_change) { | |
1161 | status = ocfs2_rw_lock(inode, 1); | |
1162 | if (status < 0) { | |
1163 | mlog_errno(status); | |
1164 | goto bail; | |
1165 | } | |
1166 | } | |
1167 | ||
e63aecb6 | 1168 | status = ocfs2_inode_lock(inode, &bh, 1); |
ccd979bd MF |
1169 | if (status < 0) { |
1170 | if (status != -ENOENT) | |
1171 | mlog_errno(status); | |
1172 | goto bail_unlock_rw; | |
1173 | } | |
1174 | ||
1175 | if (size_change && attr->ia_size != i_size_read(inode)) { | |
5051f768 WW |
1176 | status = inode_newsize_ok(inode, attr->ia_size); |
1177 | if (status) | |
ce76fd30 | 1178 | goto bail_unlock; |
ce76fd30 | 1179 | |
2b4e30fb JB |
1180 | if (i_size_read(inode) > attr->ia_size) { |
1181 | if (ocfs2_should_order_data(inode)) { | |
1182 | status = ocfs2_begin_ordered_truncate(inode, | |
1183 | attr->ia_size); | |
1184 | if (status) | |
1185 | goto bail_unlock; | |
1186 | } | |
ccd979bd | 1187 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
2b4e30fb | 1188 | } else |
65ed39d6 | 1189 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
ccd979bd MF |
1190 | if (status < 0) { |
1191 | if (status != -ENOSPC) | |
1192 | mlog_errno(status); | |
1193 | status = -ENOSPC; | |
1194 | goto bail_unlock; | |
1195 | } | |
1196 | } | |
1197 | ||
a90714c1 JK |
1198 | if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || |
1199 | (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { | |
65bac575 JK |
1200 | /* |
1201 | * Gather pointers to quota structures so that allocation / | |
1202 | * freeing of quota structures happens here and not inside | |
b43fa828 | 1203 | * dquot_transfer() where we have problems with lock ordering |
65bac575 | 1204 | */ |
a90714c1 JK |
1205 | if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid |
1206 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1207 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { | |
65bac575 JK |
1208 | transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid, |
1209 | USRQUOTA); | |
52a9ee28 | 1210 | if (!transfer_to[USRQUOTA]) { |
65bac575 | 1211 | status = -ESRCH; |
a90714c1 | 1212 | goto bail_unlock; |
65bac575 | 1213 | } |
a90714c1 JK |
1214 | } |
1215 | if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid | |
1216 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1217 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { | |
65bac575 JK |
1218 | transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid, |
1219 | GRPQUOTA); | |
52a9ee28 | 1220 | if (!transfer_to[GRPQUOTA]) { |
65bac575 | 1221 | status = -ESRCH; |
a90714c1 | 1222 | goto bail_unlock; |
65bac575 | 1223 | } |
a90714c1 | 1224 | } |
65bac575 JK |
1225 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
1226 | 2 * ocfs2_quota_trans_credits(sb)); | |
a90714c1 JK |
1227 | if (IS_ERR(handle)) { |
1228 | status = PTR_ERR(handle); | |
1229 | mlog_errno(status); | |
1230 | goto bail_unlock; | |
1231 | } | |
52a9ee28 | 1232 | status = __dquot_transfer(inode, transfer_to); |
a90714c1 JK |
1233 | if (status < 0) |
1234 | goto bail_commit; | |
1235 | } else { | |
1236 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1237 | if (IS_ERR(handle)) { | |
1238 | status = PTR_ERR(handle); | |
1239 | mlog_errno(status); | |
1240 | goto bail_unlock; | |
1241 | } | |
ccd979bd MF |
1242 | } |
1243 | ||
7307de80 | 1244 | /* |
2c27c65e | 1245 | * This will intentionally not wind up calling truncate_setsize(), |
7307de80 MF |
1246 | * since all the work for a size change has been done above. |
1247 | * Otherwise, we could get into problems with truncate as | |
1248 | * ip_alloc_sem is used there to protect against i_size | |
1249 | * changes. | |
1025774c CH |
1250 | * |
1251 | * XXX: this means the conditional below can probably be removed. | |
7307de80 | 1252 | */ |
1025774c CH |
1253 | if ((attr->ia_valid & ATTR_SIZE) && |
1254 | attr->ia_size != i_size_read(inode)) { | |
1255 | status = vmtruncate(inode, attr->ia_size); | |
1256 | if (status) { | |
1257 | mlog_errno(status); | |
1258 | goto bail_commit; | |
1259 | } | |
ccd979bd MF |
1260 | } |
1261 | ||
1025774c CH |
1262 | setattr_copy(inode, attr); |
1263 | mark_inode_dirty(inode); | |
1264 | ||
ccd979bd MF |
1265 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
1266 | if (status < 0) | |
1267 | mlog_errno(status); | |
1268 | ||
1269 | bail_commit: | |
02dc1af4 | 1270 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1271 | bail_unlock: |
e63aecb6 | 1272 | ocfs2_inode_unlock(inode, 1); |
ccd979bd MF |
1273 | bail_unlock_rw: |
1274 | if (size_change) | |
1275 | ocfs2_rw_unlock(inode, 1); | |
1276 | bail: | |
a81cb88b | 1277 | brelse(bh); |
ccd979bd | 1278 | |
65bac575 | 1279 | /* Release quota pointers in case we acquired them */ |
52a9ee28 | 1280 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) |
65bac575 | 1281 | dqput(transfer_to[qtype]); |
65bac575 | 1282 | |
060bc66d TY |
1283 | if (!status && attr->ia_valid & ATTR_MODE) { |
1284 | status = ocfs2_acl_chmod(inode); | |
1285 | if (status < 0) | |
1286 | mlog_errno(status); | |
1287 | } | |
1288 | ||
ccd979bd MF |
1289 | mlog_exit(status); |
1290 | return status; | |
1291 | } | |
1292 | ||
1293 | int ocfs2_getattr(struct vfsmount *mnt, | |
1294 | struct dentry *dentry, | |
1295 | struct kstat *stat) | |
1296 | { | |
1297 | struct inode *inode = dentry->d_inode; | |
1298 | struct super_block *sb = dentry->d_inode->i_sb; | |
1299 | struct ocfs2_super *osb = sb->s_fs_info; | |
1300 | int err; | |
1301 | ||
1302 | mlog_entry_void(); | |
1303 | ||
1304 | err = ocfs2_inode_revalidate(dentry); | |
1305 | if (err) { | |
1306 | if (err != -ENOENT) | |
1307 | mlog_errno(err); | |
1308 | goto bail; | |
1309 | } | |
1310 | ||
1311 | generic_fillattr(inode, stat); | |
1312 | ||
1313 | /* We set the blksize from the cluster size for performance */ | |
1314 | stat->blksize = osb->s_clustersize; | |
1315 | ||
1316 | bail: | |
1317 | mlog_exit(err); | |
1318 | ||
1319 | return err; | |
1320 | } | |
1321 | ||
e6305c43 | 1322 | int ocfs2_permission(struct inode *inode, int mask) |
d38eb8db TY |
1323 | { |
1324 | int ret; | |
1325 | ||
1326 | mlog_entry_void(); | |
1327 | ||
e63aecb6 | 1328 | ret = ocfs2_inode_lock(inode, NULL, 0); |
d38eb8db | 1329 | if (ret) { |
a9f5f707 MF |
1330 | if (ret != -ENOENT) |
1331 | mlog_errno(ret); | |
d38eb8db TY |
1332 | goto out; |
1333 | } | |
1334 | ||
23fc2702 | 1335 | ret = generic_permission(inode, mask, ocfs2_check_acl); |
d38eb8db | 1336 | |
e63aecb6 | 1337 | ocfs2_inode_unlock(inode, 0); |
d38eb8db TY |
1338 | out: |
1339 | mlog_exit(ret); | |
1340 | return ret; | |
1341 | } | |
1342 | ||
b2580103 MF |
1343 | static int __ocfs2_write_remove_suid(struct inode *inode, |
1344 | struct buffer_head *bh) | |
ccd979bd MF |
1345 | { |
1346 | int ret; | |
1fabe148 | 1347 | handle_t *handle; |
ccd979bd MF |
1348 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1349 | struct ocfs2_dinode *di; | |
1350 | ||
b0697053 | 1351 | mlog_entry("(Inode %llu, mode 0%o)\n", |
b2580103 | 1352 | (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode); |
ccd979bd | 1353 | |
65eff9cc | 1354 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
1355 | if (IS_ERR(handle)) { |
1356 | ret = PTR_ERR(handle); | |
ccd979bd MF |
1357 | mlog_errno(ret); |
1358 | goto out; | |
1359 | } | |
1360 | ||
0cf2f763 | 1361 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 1362 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1363 | if (ret < 0) { |
1364 | mlog_errno(ret); | |
b2580103 | 1365 | goto out_trans; |
ccd979bd MF |
1366 | } |
1367 | ||
1368 | inode->i_mode &= ~S_ISUID; | |
1369 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) | |
1370 | inode->i_mode &= ~S_ISGID; | |
1371 | ||
1372 | di = (struct ocfs2_dinode *) bh->b_data; | |
1373 | di->i_mode = cpu_to_le16(inode->i_mode); | |
1374 | ||
ec20cec7 | 1375 | ocfs2_journal_dirty(handle, bh); |
b2580103 | 1376 | |
ccd979bd | 1377 | out_trans: |
02dc1af4 | 1378 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
1379 | out: |
1380 | mlog_exit(ret); | |
1381 | return ret; | |
1382 | } | |
1383 | ||
9517bac6 MF |
1384 | /* |
1385 | * Will look for holes and unwritten extents in the range starting at | |
1386 | * pos for count bytes (inclusive). | |
1387 | */ | |
1388 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, | |
1389 | size_t count) | |
1390 | { | |
1391 | int ret = 0; | |
49cb8d2d | 1392 | unsigned int extent_flags; |
9517bac6 MF |
1393 | u32 cpos, clusters, extent_len, phys_cpos; |
1394 | struct super_block *sb = inode->i_sb; | |
1395 | ||
1396 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
1397 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
1398 | ||
1399 | while (clusters) { | |
49cb8d2d MF |
1400 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
1401 | &extent_flags); | |
9517bac6 MF |
1402 | if (ret < 0) { |
1403 | mlog_errno(ret); | |
1404 | goto out; | |
1405 | } | |
1406 | ||
49cb8d2d | 1407 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
9517bac6 MF |
1408 | ret = 1; |
1409 | break; | |
1410 | } | |
1411 | ||
1412 | if (extent_len > clusters) | |
1413 | extent_len = clusters; | |
1414 | ||
1415 | clusters -= extent_len; | |
1416 | cpos += extent_len; | |
1417 | } | |
1418 | out: | |
1419 | return ret; | |
1420 | } | |
1421 | ||
b2580103 MF |
1422 | static int ocfs2_write_remove_suid(struct inode *inode) |
1423 | { | |
1424 | int ret; | |
1425 | struct buffer_head *bh = NULL; | |
b2580103 | 1426 | |
b657c95c | 1427 | ret = ocfs2_read_inode_block(inode, &bh); |
b2580103 MF |
1428 | if (ret < 0) { |
1429 | mlog_errno(ret); | |
1430 | goto out; | |
1431 | } | |
1432 | ||
1433 | ret = __ocfs2_write_remove_suid(inode, bh); | |
1434 | out: | |
1435 | brelse(bh); | |
1436 | return ret; | |
1437 | } | |
1438 | ||
2ae99a60 MF |
1439 | /* |
1440 | * Allocate enough extents to cover the region starting at byte offset | |
1441 | * start for len bytes. Existing extents are skipped, any extents | |
1442 | * added are marked as "unwritten". | |
1443 | */ | |
1444 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, | |
1445 | u64 start, u64 len) | |
1446 | { | |
1447 | int ret; | |
1448 | u32 cpos, phys_cpos, clusters, alloc_size; | |
1afc32b9 MF |
1449 | u64 end = start + len; |
1450 | struct buffer_head *di_bh = NULL; | |
1451 | ||
1452 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
b657c95c | 1453 | ret = ocfs2_read_inode_block(inode, &di_bh); |
1afc32b9 MF |
1454 | if (ret) { |
1455 | mlog_errno(ret); | |
1456 | goto out; | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * Nothing to do if the requested reservation range | |
1461 | * fits within the inode. | |
1462 | */ | |
1463 | if (ocfs2_size_fits_inline_data(di_bh, end)) | |
1464 | goto out; | |
1465 | ||
1466 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1467 | if (ret) { | |
1468 | mlog_errno(ret); | |
1469 | goto out; | |
1470 | } | |
1471 | } | |
2ae99a60 MF |
1472 | |
1473 | /* | |
1474 | * We consider both start and len to be inclusive. | |
1475 | */ | |
1476 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1477 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); | |
1478 | clusters -= cpos; | |
1479 | ||
1480 | while (clusters) { | |
1481 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1482 | &alloc_size, NULL); | |
1483 | if (ret) { | |
1484 | mlog_errno(ret); | |
1485 | goto out; | |
1486 | } | |
1487 | ||
1488 | /* | |
1489 | * Hole or existing extent len can be arbitrary, so | |
1490 | * cap it to our own allocation request. | |
1491 | */ | |
1492 | if (alloc_size > clusters) | |
1493 | alloc_size = clusters; | |
1494 | ||
1495 | if (phys_cpos) { | |
1496 | /* | |
1497 | * We already have an allocation at this | |
1498 | * region so we can safely skip it. | |
1499 | */ | |
1500 | goto next; | |
1501 | } | |
1502 | ||
1503 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); | |
1504 | if (ret) { | |
1505 | if (ret != -ENOSPC) | |
1506 | mlog_errno(ret); | |
1507 | goto out; | |
1508 | } | |
1509 | ||
1510 | next: | |
1511 | cpos += alloc_size; | |
1512 | clusters -= alloc_size; | |
1513 | } | |
1514 | ||
1515 | ret = 0; | |
1516 | out: | |
1afc32b9 MF |
1517 | |
1518 | brelse(di_bh); | |
2ae99a60 MF |
1519 | return ret; |
1520 | } | |
1521 | ||
063c4561 MF |
1522 | /* |
1523 | * Truncate a byte range, avoiding pages within partial clusters. This | |
1524 | * preserves those pages for the zeroing code to write to. | |
1525 | */ | |
1526 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, | |
1527 | u64 byte_len) | |
1528 | { | |
1529 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1530 | loff_t start, end; | |
1531 | struct address_space *mapping = inode->i_mapping; | |
1532 | ||
1533 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); | |
1534 | end = byte_start + byte_len; | |
1535 | end = end & ~(osb->s_clustersize - 1); | |
1536 | ||
1537 | if (start < end) { | |
1538 | unmap_mapping_range(mapping, start, end - start, 0); | |
1539 | truncate_inode_pages_range(mapping, start, end - 1); | |
1540 | } | |
1541 | } | |
1542 | ||
1543 | static int ocfs2_zero_partial_clusters(struct inode *inode, | |
1544 | u64 start, u64 len) | |
1545 | { | |
1546 | int ret = 0; | |
1547 | u64 tmpend, end = start + len; | |
1548 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1549 | unsigned int csize = osb->s_clustersize; | |
1550 | handle_t *handle; | |
1551 | ||
1552 | /* | |
1553 | * The "start" and "end" values are NOT necessarily part of | |
1554 | * the range whose allocation is being deleted. Rather, this | |
1555 | * is what the user passed in with the request. We must zero | |
1556 | * partial clusters here. There's no need to worry about | |
1557 | * physical allocation - the zeroing code knows to skip holes. | |
1558 | */ | |
1559 | mlog(0, "byte start: %llu, end: %llu\n", | |
1560 | (unsigned long long)start, (unsigned long long)end); | |
1561 | ||
1562 | /* | |
1563 | * If both edges are on a cluster boundary then there's no | |
1564 | * zeroing required as the region is part of the allocation to | |
1565 | * be truncated. | |
1566 | */ | |
1567 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) | |
1568 | goto out; | |
1569 | ||
1570 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
1571 | if (IS_ERR(handle)) { |
1572 | ret = PTR_ERR(handle); | |
063c4561 MF |
1573 | mlog_errno(ret); |
1574 | goto out; | |
1575 | } | |
1576 | ||
1577 | /* | |
1578 | * We want to get the byte offset of the end of the 1st cluster. | |
1579 | */ | |
1580 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); | |
1581 | if (tmpend > end) | |
1582 | tmpend = end; | |
1583 | ||
1584 | mlog(0, "1st range: start: %llu, tmpend: %llu\n", | |
1585 | (unsigned long long)start, (unsigned long long)tmpend); | |
1586 | ||
1587 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); | |
1588 | if (ret) | |
1589 | mlog_errno(ret); | |
1590 | ||
1591 | if (tmpend < end) { | |
1592 | /* | |
1593 | * This may make start and end equal, but the zeroing | |
1594 | * code will skip any work in that case so there's no | |
1595 | * need to catch it up here. | |
1596 | */ | |
1597 | start = end & ~(osb->s_clustersize - 1); | |
1598 | ||
1599 | mlog(0, "2nd range: start: %llu, end: %llu\n", | |
1600 | (unsigned long long)start, (unsigned long long)end); | |
1601 | ||
1602 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); | |
1603 | if (ret) | |
1604 | mlog_errno(ret); | |
1605 | } | |
1606 | ||
1607 | ocfs2_commit_trans(osb, handle); | |
1608 | out: | |
1609 | return ret; | |
1610 | } | |
1611 | ||
c1631d4a TY |
1612 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
1613 | { | |
1614 | int i; | |
1615 | struct ocfs2_extent_rec *rec = NULL; | |
1616 | ||
1617 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
1618 | ||
1619 | rec = &el->l_recs[i]; | |
1620 | ||
1621 | if (le32_to_cpu(rec->e_cpos) < pos) | |
1622 | break; | |
1623 | } | |
1624 | ||
1625 | return i; | |
1626 | } | |
1627 | ||
1628 | /* | |
1629 | * Helper to calculate the punching pos and length in one run, we handle the | |
1630 | * following three cases in order: | |
1631 | * | |
1632 | * - remove the entire record | |
1633 | * - remove a partial record | |
1634 | * - no record needs to be removed (hole-punching completed) | |
1635 | */ | |
1636 | static void ocfs2_calc_trunc_pos(struct inode *inode, | |
1637 | struct ocfs2_extent_list *el, | |
1638 | struct ocfs2_extent_rec *rec, | |
1639 | u32 trunc_start, u32 *trunc_cpos, | |
1640 | u32 *trunc_len, u32 *trunc_end, | |
1641 | u64 *blkno, int *done) | |
1642 | { | |
1643 | int ret = 0; | |
1644 | u32 coff, range; | |
1645 | ||
1646 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); | |
1647 | ||
1648 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { | |
1649 | *trunc_cpos = le32_to_cpu(rec->e_cpos); | |
1650 | /* | |
1651 | * Skip holes if any. | |
1652 | */ | |
1653 | if (range < *trunc_end) | |
1654 | *trunc_end = range; | |
1655 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); | |
1656 | *blkno = le64_to_cpu(rec->e_blkno); | |
1657 | *trunc_end = le32_to_cpu(rec->e_cpos); | |
1658 | } else if (range > trunc_start) { | |
1659 | *trunc_cpos = trunc_start; | |
1660 | *trunc_len = *trunc_end - trunc_start; | |
1661 | coff = trunc_start - le32_to_cpu(rec->e_cpos); | |
1662 | *blkno = le64_to_cpu(rec->e_blkno) + | |
1663 | ocfs2_clusters_to_blocks(inode->i_sb, coff); | |
1664 | *trunc_end = trunc_start; | |
1665 | } else { | |
1666 | /* | |
1667 | * It may have two following possibilities: | |
1668 | * | |
1669 | * - last record has been removed | |
1670 | * - trunc_start was within a hole | |
1671 | * | |
1672 | * both two cases mean the completion of hole punching. | |
1673 | */ | |
1674 | ret = 1; | |
1675 | } | |
1676 | ||
1677 | *done = ret; | |
1678 | } | |
1679 | ||
063c4561 MF |
1680 | static int ocfs2_remove_inode_range(struct inode *inode, |
1681 | struct buffer_head *di_bh, u64 byte_start, | |
1682 | u64 byte_len) | |
1683 | { | |
c1631d4a TY |
1684 | int ret = 0, flags = 0, done = 0, i; |
1685 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; | |
1686 | u32 cluster_in_el; | |
063c4561 MF |
1687 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1688 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
b1967d0e | 1689 | struct address_space *mapping = inode->i_mapping; |
fecc0112 | 1690 | struct ocfs2_extent_tree et; |
c1631d4a TY |
1691 | struct ocfs2_path *path = NULL; |
1692 | struct ocfs2_extent_list *el = NULL; | |
1693 | struct ocfs2_extent_rec *rec = NULL; | |
e8aec068 | 1694 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
c1631d4a | 1695 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
063c4561 | 1696 | |
5e404e9e | 1697 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
063c4561 MF |
1698 | ocfs2_init_dealloc_ctxt(&dealloc); |
1699 | ||
1700 | if (byte_len == 0) | |
1701 | return 0; | |
1702 | ||
1afc32b9 MF |
1703 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
1704 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, | |
b1967d0e MF |
1705 | byte_start + byte_len, 0); |
1706 | if (ret) { | |
1afc32b9 | 1707 | mlog_errno(ret); |
b1967d0e MF |
1708 | goto out; |
1709 | } | |
1710 | /* | |
1711 | * There's no need to get fancy with the page cache | |
1712 | * truncate of an inline-data inode. We're talking | |
1713 | * about less than a page here, which will be cached | |
1714 | * in the dinode buffer anyway. | |
1715 | */ | |
1716 | unmap_mapping_range(mapping, 0, 0, 0); | |
1717 | truncate_inode_pages(mapping, 0); | |
1718 | goto out; | |
1afc32b9 MF |
1719 | } |
1720 | ||
e8aec068 TY |
1721 | /* |
1722 | * For reflinks, we may need to CoW 2 clusters which might be | |
1723 | * partially zero'd later, if hole's start and end offset were | |
1724 | * within one cluster(means is not exactly aligned to clustersize). | |
1725 | */ | |
1726 | ||
1727 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { | |
1728 | ||
1729 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start); | |
1730 | if (ret) { | |
1731 | mlog_errno(ret); | |
1732 | goto out; | |
1733 | } | |
1734 | ||
1735 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len); | |
1736 | if (ret) { | |
1737 | mlog_errno(ret); | |
1738 | goto out; | |
1739 | } | |
1740 | } | |
1741 | ||
063c4561 | 1742 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
c1631d4a TY |
1743 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
1744 | cluster_in_el = trunc_end; | |
063c4561 | 1745 | |
c1631d4a | 1746 | mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, cend: %u\n", |
063c4561 MF |
1747 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
1748 | (unsigned long long)byte_start, | |
c1631d4a | 1749 | (unsigned long long)byte_len, trunc_start, trunc_end); |
063c4561 MF |
1750 | |
1751 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); | |
1752 | if (ret) { | |
1753 | mlog_errno(ret); | |
1754 | goto out; | |
1755 | } | |
1756 | ||
c1631d4a TY |
1757 | path = ocfs2_new_path_from_et(&et); |
1758 | if (!path) { | |
1759 | ret = -ENOMEM; | |
1760 | mlog_errno(ret); | |
1761 | goto out; | |
1762 | } | |
1763 | ||
1764 | while (trunc_end > trunc_start) { | |
1765 | ||
1766 | ret = ocfs2_find_path(INODE_CACHE(inode), path, | |
1767 | cluster_in_el); | |
063c4561 MF |
1768 | if (ret) { |
1769 | mlog_errno(ret); | |
1770 | goto out; | |
1771 | } | |
1772 | ||
c1631d4a | 1773 | el = path_leaf_el(path); |
063c4561 | 1774 | |
c1631d4a TY |
1775 | i = ocfs2_find_rec(el, trunc_end); |
1776 | /* | |
1777 | * Need to go to previous extent block. | |
1778 | */ | |
1779 | if (i < 0) { | |
1780 | if (path->p_tree_depth == 0) | |
1781 | break; | |
063c4561 | 1782 | |
c1631d4a TY |
1783 | ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, |
1784 | path, | |
1785 | &cluster_in_el); | |
063c4561 MF |
1786 | if (ret) { |
1787 | mlog_errno(ret); | |
1788 | goto out; | |
1789 | } | |
c1631d4a TY |
1790 | |
1791 | /* | |
1792 | * We've reached the leftmost extent block, | |
1793 | * it's safe to leave. | |
1794 | */ | |
1795 | if (cluster_in_el == 0) | |
1796 | break; | |
1797 | ||
1798 | /* | |
1799 | * The 'pos' searched for previous extent block is | |
1800 | * always one cluster less than actual trunc_end. | |
1801 | */ | |
1802 | trunc_end = cluster_in_el + 1; | |
1803 | ||
1804 | ocfs2_reinit_path(path, 1); | |
1805 | ||
1806 | continue; | |
1807 | ||
1808 | } else | |
1809 | rec = &el->l_recs[i]; | |
1810 | ||
1811 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos, | |
1812 | &trunc_len, &trunc_end, &blkno, &done); | |
1813 | if (done) | |
1814 | break; | |
1815 | ||
1816 | flags = rec->e_flags; | |
1817 | phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno); | |
1818 | ||
1819 | ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos, | |
1820 | phys_cpos, trunc_len, flags, | |
1821 | &dealloc, refcount_loc); | |
1822 | if (ret < 0) { | |
1823 | mlog_errno(ret); | |
1824 | goto out; | |
063c4561 MF |
1825 | } |
1826 | ||
c1631d4a TY |
1827 | cluster_in_el = trunc_end; |
1828 | ||
1829 | ocfs2_reinit_path(path, 1); | |
063c4561 MF |
1830 | } |
1831 | ||
1832 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); | |
1833 | ||
1834 | out: | |
1835 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
1836 | ocfs2_run_deallocs(osb, &dealloc); | |
1837 | ||
1838 | return ret; | |
1839 | } | |
1840 | ||
b2580103 MF |
1841 | /* |
1842 | * Parts of this function taken from xfs_change_file_space() | |
1843 | */ | |
385820a3 MF |
1844 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
1845 | loff_t f_pos, unsigned int cmd, | |
1846 | struct ocfs2_space_resv *sr, | |
1847 | int change_size) | |
b2580103 MF |
1848 | { |
1849 | int ret; | |
1850 | s64 llen; | |
385820a3 | 1851 | loff_t size; |
b2580103 MF |
1852 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1853 | struct buffer_head *di_bh = NULL; | |
1854 | handle_t *handle; | |
a00cce35 | 1855 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
b2580103 | 1856 | |
b2580103 MF |
1857 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
1858 | return -EROFS; | |
1859 | ||
1860 | mutex_lock(&inode->i_mutex); | |
1861 | ||
1862 | /* | |
1863 | * This prevents concurrent writes on other nodes | |
1864 | */ | |
1865 | ret = ocfs2_rw_lock(inode, 1); | |
1866 | if (ret) { | |
1867 | mlog_errno(ret); | |
1868 | goto out; | |
1869 | } | |
1870 | ||
e63aecb6 | 1871 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
b2580103 MF |
1872 | if (ret) { |
1873 | mlog_errno(ret); | |
1874 | goto out_rw_unlock; | |
1875 | } | |
1876 | ||
1877 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { | |
1878 | ret = -EPERM; | |
e63aecb6 | 1879 | goto out_inode_unlock; |
b2580103 MF |
1880 | } |
1881 | ||
1882 | switch (sr->l_whence) { | |
1883 | case 0: /*SEEK_SET*/ | |
1884 | break; | |
1885 | case 1: /*SEEK_CUR*/ | |
385820a3 | 1886 | sr->l_start += f_pos; |
b2580103 MF |
1887 | break; |
1888 | case 2: /*SEEK_END*/ | |
1889 | sr->l_start += i_size_read(inode); | |
1890 | break; | |
1891 | default: | |
1892 | ret = -EINVAL; | |
e63aecb6 | 1893 | goto out_inode_unlock; |
b2580103 MF |
1894 | } |
1895 | sr->l_whence = 0; | |
1896 | ||
1897 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; | |
1898 | ||
1899 | if (sr->l_start < 0 | |
1900 | || sr->l_start > max_off | |
1901 | || (sr->l_start + llen) < 0 | |
1902 | || (sr->l_start + llen) > max_off) { | |
1903 | ret = -EINVAL; | |
e63aecb6 | 1904 | goto out_inode_unlock; |
b2580103 | 1905 | } |
385820a3 | 1906 | size = sr->l_start + sr->l_len; |
b2580103 MF |
1907 | |
1908 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { | |
1909 | if (sr->l_len <= 0) { | |
1910 | ret = -EINVAL; | |
e63aecb6 | 1911 | goto out_inode_unlock; |
b2580103 MF |
1912 | } |
1913 | } | |
1914 | ||
385820a3 | 1915 | if (file && should_remove_suid(file->f_path.dentry)) { |
b2580103 MF |
1916 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
1917 | if (ret) { | |
1918 | mlog_errno(ret); | |
e63aecb6 | 1919 | goto out_inode_unlock; |
b2580103 MF |
1920 | } |
1921 | } | |
1922 | ||
1923 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1924 | switch (cmd) { | |
1925 | case OCFS2_IOC_RESVSP: | |
1926 | case OCFS2_IOC_RESVSP64: | |
1927 | /* | |
1928 | * This takes unsigned offsets, but the signed ones we | |
1929 | * pass have been checked against overflow above. | |
1930 | */ | |
1931 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, | |
1932 | sr->l_len); | |
1933 | break; | |
1934 | case OCFS2_IOC_UNRESVSP: | |
1935 | case OCFS2_IOC_UNRESVSP64: | |
1936 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, | |
1937 | sr->l_len); | |
1938 | break; | |
1939 | default: | |
1940 | ret = -EINVAL; | |
1941 | } | |
1942 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1943 | if (ret) { | |
1944 | mlog_errno(ret); | |
e63aecb6 | 1945 | goto out_inode_unlock; |
b2580103 MF |
1946 | } |
1947 | ||
1948 | /* | |
1949 | * We update c/mtime for these changes | |
1950 | */ | |
1951 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1952 | if (IS_ERR(handle)) { | |
1953 | ret = PTR_ERR(handle); | |
1954 | mlog_errno(ret); | |
e63aecb6 | 1955 | goto out_inode_unlock; |
b2580103 MF |
1956 | } |
1957 | ||
385820a3 MF |
1958 | if (change_size && i_size_read(inode) < size) |
1959 | i_size_write(inode, size); | |
1960 | ||
b2580103 MF |
1961 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
1962 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); | |
1963 | if (ret < 0) | |
1964 | mlog_errno(ret); | |
1965 | ||
1966 | ocfs2_commit_trans(osb, handle); | |
1967 | ||
e63aecb6 | 1968 | out_inode_unlock: |
b2580103 | 1969 | brelse(di_bh); |
e63aecb6 | 1970 | ocfs2_inode_unlock(inode, 1); |
b2580103 MF |
1971 | out_rw_unlock: |
1972 | ocfs2_rw_unlock(inode, 1); | |
1973 | ||
b2580103 | 1974 | out: |
c259ae52 | 1975 | mutex_unlock(&inode->i_mutex); |
b2580103 MF |
1976 | return ret; |
1977 | } | |
1978 | ||
385820a3 MF |
1979 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
1980 | struct ocfs2_space_resv *sr) | |
1981 | { | |
1982 | struct inode *inode = file->f_path.dentry->d_inode; | |
c19a28e1 | 1983 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
385820a3 MF |
1984 | |
1985 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && | |
1986 | !ocfs2_writes_unwritten_extents(osb)) | |
1987 | return -ENOTTY; | |
1988 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && | |
1989 | !ocfs2_sparse_alloc(osb)) | |
1990 | return -ENOTTY; | |
1991 | ||
1992 | if (!S_ISREG(inode->i_mode)) | |
1993 | return -EINVAL; | |
1994 | ||
1995 | if (!(file->f_mode & FMODE_WRITE)) | |
1996 | return -EBADF; | |
1997 | ||
1998 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); | |
1999 | } | |
2000 | ||
2001 | static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset, | |
2002 | loff_t len) | |
2003 | { | |
2004 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2005 | struct ocfs2_space_resv sr; | |
2006 | int change_size = 1; | |
2007 | ||
2008 | if (!ocfs2_writes_unwritten_extents(osb)) | |
2009 | return -EOPNOTSUPP; | |
2010 | ||
2011 | if (S_ISDIR(inode->i_mode)) | |
2012 | return -ENODEV; | |
2013 | ||
2014 | if (mode & FALLOC_FL_KEEP_SIZE) | |
2015 | change_size = 0; | |
2016 | ||
2017 | sr.l_whence = 0; | |
2018 | sr.l_start = (s64)offset; | |
2019 | sr.l_len = (s64)len; | |
2020 | ||
2021 | return __ocfs2_change_file_space(NULL, inode, offset, | |
2022 | OCFS2_IOC_RESVSP64, &sr, change_size); | |
2023 | } | |
2024 | ||
293b2f70 TM |
2025 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
2026 | size_t count) | |
2027 | { | |
2028 | int ret = 0; | |
2029 | unsigned int extent_flags; | |
2030 | u32 cpos, clusters, extent_len, phys_cpos; | |
2031 | struct super_block *sb = inode->i_sb; | |
2032 | ||
2033 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || | |
2f48d593 TM |
2034 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
2035 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) | |
293b2f70 TM |
2036 | return 0; |
2037 | ||
2038 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
2039 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
2040 | ||
2041 | while (clusters) { | |
2042 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, | |
2043 | &extent_flags); | |
2044 | if (ret < 0) { | |
2045 | mlog_errno(ret); | |
2046 | goto out; | |
2047 | } | |
2048 | ||
2049 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { | |
2050 | ret = 1; | |
2051 | break; | |
2052 | } | |
2053 | ||
2054 | if (extent_len > clusters) | |
2055 | extent_len = clusters; | |
2056 | ||
2057 | clusters -= extent_len; | |
2058 | cpos += extent_len; | |
2059 | } | |
2060 | out: | |
2061 | return ret; | |
2062 | } | |
2063 | ||
2064 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, | |
2065 | loff_t pos, size_t count, | |
2066 | int *meta_level) | |
2067 | { | |
2068 | int ret; | |
2069 | struct buffer_head *di_bh = NULL; | |
2070 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
2071 | u32 clusters = | |
2072 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; | |
2073 | ||
2074 | ret = ocfs2_inode_lock(inode, &di_bh, 1); | |
2075 | if (ret) { | |
2076 | mlog_errno(ret); | |
2077 | goto out; | |
2078 | } | |
2079 | ||
2080 | *meta_level = 1; | |
2081 | ||
37f8a2bf | 2082 | ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX); |
293b2f70 TM |
2083 | if (ret) |
2084 | mlog_errno(ret); | |
2085 | out: | |
2086 | brelse(di_bh); | |
2087 | return ret; | |
2088 | } | |
2089 | ||
8659ac25 TY |
2090 | static int ocfs2_prepare_inode_for_write(struct dentry *dentry, |
2091 | loff_t *ppos, | |
2092 | size_t count, | |
9517bac6 | 2093 | int appending, |
86470e98 TM |
2094 | int *direct_io, |
2095 | int *has_refcount) | |
ccd979bd | 2096 | { |
65ed39d6 | 2097 | int ret = 0, meta_level = 0; |
8659ac25 | 2098 | struct inode *inode = dentry->d_inode; |
65ed39d6 | 2099 | loff_t saved_pos, end; |
ccd979bd | 2100 | |
2bd63216 | 2101 | /* |
65ed39d6 MF |
2102 | * We start with a read level meta lock and only jump to an ex |
2103 | * if we need to make modifications here. | |
ccd979bd | 2104 | */ |
ccd979bd | 2105 | for(;;) { |
e63aecb6 | 2106 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
ccd979bd MF |
2107 | if (ret < 0) { |
2108 | meta_level = -1; | |
2109 | mlog_errno(ret); | |
2110 | goto out; | |
2111 | } | |
2112 | ||
2113 | /* Clear suid / sgid if necessary. We do this here | |
2114 | * instead of later in the write path because | |
2115 | * remove_suid() calls ->setattr without any hint that | |
2116 | * we may have already done our cluster locking. Since | |
2117 | * ocfs2_setattr() *must* take cluster locks to | |
2118 | * proceeed, this will lead us to recursively lock the | |
2119 | * inode. There's also the dinode i_size state which | |
2120 | * can be lost via setattr during extending writes (we | |
2121 | * set inode->i_size at the end of a write. */ | |
8659ac25 | 2122 | if (should_remove_suid(dentry)) { |
ccd979bd | 2123 | if (meta_level == 0) { |
e63aecb6 | 2124 | ocfs2_inode_unlock(inode, meta_level); |
ccd979bd MF |
2125 | meta_level = 1; |
2126 | continue; | |
2127 | } | |
2128 | ||
2129 | ret = ocfs2_write_remove_suid(inode); | |
2130 | if (ret < 0) { | |
2131 | mlog_errno(ret); | |
8659ac25 | 2132 | goto out_unlock; |
ccd979bd MF |
2133 | } |
2134 | } | |
2135 | ||
2136 | /* work on a copy of ppos until we're sure that we won't have | |
2137 | * to recalculate it due to relocking. */ | |
8659ac25 | 2138 | if (appending) { |
ccd979bd MF |
2139 | saved_pos = i_size_read(inode); |
2140 | mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos); | |
2141 | } else { | |
8659ac25 | 2142 | saved_pos = *ppos; |
ccd979bd | 2143 | } |
3a0782d0 | 2144 | |
65ed39d6 | 2145 | end = saved_pos + count; |
9517bac6 | 2146 | |
293b2f70 TM |
2147 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
2148 | if (ret == 1) { | |
2149 | ocfs2_inode_unlock(inode, meta_level); | |
2150 | meta_level = -1; | |
2151 | ||
2152 | ret = ocfs2_prepare_inode_for_refcount(inode, | |
2153 | saved_pos, | |
2154 | count, | |
2155 | &meta_level); | |
86470e98 TM |
2156 | if (has_refcount) |
2157 | *has_refcount = 1; | |
96a1cc73 WW |
2158 | if (direct_io) |
2159 | *direct_io = 0; | |
293b2f70 TM |
2160 | } |
2161 | ||
2162 | if (ret < 0) { | |
2163 | mlog_errno(ret); | |
2164 | goto out_unlock; | |
2165 | } | |
2166 | ||
65ed39d6 MF |
2167 | /* |
2168 | * Skip the O_DIRECT checks if we don't need | |
2169 | * them. | |
2170 | */ | |
2171 | if (!direct_io || !(*direct_io)) | |
9517bac6 | 2172 | break; |
9517bac6 | 2173 | |
1afc32b9 MF |
2174 | /* |
2175 | * There's no sane way to do direct writes to an inode | |
2176 | * with inline data. | |
2177 | */ | |
2178 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2179 | *direct_io = 0; | |
2180 | break; | |
2181 | } | |
2182 | ||
3a0782d0 | 2183 | /* |
65ed39d6 MF |
2184 | * Allowing concurrent direct writes means |
2185 | * i_size changes wouldn't be synchronized, so | |
2186 | * one node could wind up truncating another | |
2187 | * nodes writes. | |
3a0782d0 | 2188 | */ |
65ed39d6 MF |
2189 | if (end > i_size_read(inode)) { |
2190 | *direct_io = 0; | |
ccd979bd | 2191 | break; |
ccd979bd MF |
2192 | } |
2193 | ||
65ed39d6 MF |
2194 | /* |
2195 | * We don't fill holes during direct io, so | |
2196 | * check for them here. If any are found, the | |
2197 | * caller will have to retake some cluster | |
2198 | * locks and initiate the io as buffered. | |
2199 | */ | |
2200 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); | |
2201 | if (ret == 1) { | |
2202 | *direct_io = 0; | |
2203 | ret = 0; | |
2204 | } else if (ret < 0) | |
2205 | mlog_errno(ret); | |
ccd979bd MF |
2206 | break; |
2207 | } | |
2208 | ||
8659ac25 TY |
2209 | if (appending) |
2210 | *ppos = saved_pos; | |
2211 | ||
2212 | out_unlock: | |
293b2f70 TM |
2213 | if (meta_level >= 0) |
2214 | ocfs2_inode_unlock(inode, meta_level); | |
8659ac25 TY |
2215 | |
2216 | out: | |
2217 | return ret; | |
2218 | } | |
2219 | ||
2220 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, | |
2221 | const struct iovec *iov, | |
2222 | unsigned long nr_segs, | |
2223 | loff_t pos) | |
2224 | { | |
9517bac6 | 2225 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
86470e98 | 2226 | int can_do_direct, has_refcount = 0; |
9517bac6 MF |
2227 | ssize_t written = 0; |
2228 | size_t ocount; /* original count */ | |
2229 | size_t count; /* after file limit checks */ | |
9ea2d32f MF |
2230 | loff_t old_size, *ppos = &iocb->ki_pos; |
2231 | u32 old_clusters; | |
9517bac6 MF |
2232 | struct file *file = iocb->ki_filp; |
2233 | struct inode *inode = file->f_path.dentry->d_inode; | |
9ea2d32f | 2234 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
9517bac6 MF |
2235 | |
2236 | mlog_entry("(0x%p, %u, '%.*s')\n", file, | |
8659ac25 | 2237 | (unsigned int)nr_segs, |
9517bac6 MF |
2238 | file->f_path.dentry->d_name.len, |
2239 | file->f_path.dentry->d_name.name); | |
8659ac25 | 2240 | |
8659ac25 TY |
2241 | if (iocb->ki_left == 0) |
2242 | return 0; | |
2243 | ||
9517bac6 MF |
2244 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
2245 | ||
2246 | appending = file->f_flags & O_APPEND ? 1 : 0; | |
2247 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; | |
2248 | ||
8659ac25 | 2249 | mutex_lock(&inode->i_mutex); |
9517bac6 MF |
2250 | |
2251 | relock: | |
8659ac25 | 2252 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ |
9517bac6 | 2253 | if (direct_io) { |
8659ac25 | 2254 | down_read(&inode->i_alloc_sem); |
9517bac6 | 2255 | have_alloc_sem = 1; |
8659ac25 TY |
2256 | } |
2257 | ||
2258 | /* concurrent O_DIRECT writes are allowed */ | |
9517bac6 | 2259 | rw_level = !direct_io; |
8659ac25 TY |
2260 | ret = ocfs2_rw_lock(inode, rw_level); |
2261 | if (ret < 0) { | |
8659ac25 | 2262 | mlog_errno(ret); |
9517bac6 | 2263 | goto out_sems; |
8659ac25 TY |
2264 | } |
2265 | ||
9517bac6 MF |
2266 | can_do_direct = direct_io; |
2267 | ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos, | |
2268 | iocb->ki_left, appending, | |
86470e98 | 2269 | &can_do_direct, &has_refcount); |
8659ac25 TY |
2270 | if (ret < 0) { |
2271 | mlog_errno(ret); | |
2272 | goto out; | |
2273 | } | |
ccd979bd | 2274 | |
9517bac6 MF |
2275 | /* |
2276 | * We can't complete the direct I/O as requested, fall back to | |
2277 | * buffered I/O. | |
2278 | */ | |
2279 | if (direct_io && !can_do_direct) { | |
2280 | ocfs2_rw_unlock(inode, rw_level); | |
2281 | up_read(&inode->i_alloc_sem); | |
2282 | ||
2283 | have_alloc_sem = 0; | |
2284 | rw_level = -1; | |
2285 | ||
2286 | direct_io = 0; | |
9517bac6 MF |
2287 | goto relock; |
2288 | } | |
2289 | ||
9ea2d32f MF |
2290 | /* |
2291 | * To later detect whether a journal commit for sync writes is | |
2292 | * necessary, we sample i_size, and cluster count here. | |
2293 | */ | |
2294 | old_size = i_size_read(inode); | |
2295 | old_clusters = OCFS2_I(inode)->ip_clusters; | |
2296 | ||
ccd979bd | 2297 | /* communicate with ocfs2_dio_end_io */ |
7cdfc3a1 | 2298 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd | 2299 | |
6b933c8e LD |
2300 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
2301 | VERIFY_READ); | |
2302 | if (ret) | |
2303 | goto out_dio; | |
b6af1bcd | 2304 | |
6b933c8e LD |
2305 | count = ocount; |
2306 | ret = generic_write_checks(file, ppos, &count, | |
2307 | S_ISBLK(inode->i_mode)); | |
2308 | if (ret) | |
2309 | goto out_dio; | |
b6af1bcd | 2310 | |
6b933c8e | 2311 | if (direct_io) { |
9517bac6 MF |
2312 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
2313 | ppos, count, ocount); | |
2314 | if (written < 0) { | |
c4354001 DM |
2315 | /* |
2316 | * direct write may have instantiated a few | |
2317 | * blocks outside i_size. Trim these off again. | |
2318 | * Don't need i_size_read because we hold i_mutex. | |
15c6fd97 | 2319 | * |
2c27c65e | 2320 | * XXX(truncate): this looks buggy because ocfs2 did not |
15c6fd97 | 2321 | * actually implement ->truncate. Take a look at |
2322 | * the new truncate sequence and update this accordingly | |
c4354001 DM |
2323 | */ |
2324 | if (*ppos + count > inode->i_size) | |
2c27c65e | 2325 | truncate_setsize(inode, inode->i_size); |
9517bac6 MF |
2326 | ret = written; |
2327 | goto out_dio; | |
2328 | } | |
2329 | } else { | |
6b933c8e LD |
2330 | current->backing_dev_info = file->f_mapping->backing_dev_info; |
2331 | written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos, | |
2332 | ppos, count, 0); | |
2333 | current->backing_dev_info = NULL; | |
9517bac6 | 2334 | } |
ccd979bd | 2335 | |
9517bac6 | 2336 | out_dio: |
ccd979bd | 2337 | /* buffered aio wouldn't have proper lock coverage today */ |
9517bac6 | 2338 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
ccd979bd | 2339 | |
60c48674 | 2340 | if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) || |
81c8c82b | 2341 | ((file->f_flags & O_DIRECT) && !direct_io)) { |
918941a3 JK |
2342 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
2343 | pos + count - 1); | |
2344 | if (ret < 0) | |
2345 | written = ret; | |
2346 | ||
a03ab788 CL |
2347 | if (!ret && ((old_size != i_size_read(inode)) || |
2348 | (old_clusters != OCFS2_I(inode)->ip_clusters) || | |
2349 | has_refcount)) { | |
2b4e30fb | 2350 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
9ea2d32f MF |
2351 | if (ret < 0) |
2352 | written = ret; | |
2353 | } | |
918941a3 JK |
2354 | |
2355 | if (!ret) | |
2356 | ret = filemap_fdatawait_range(file->f_mapping, pos, | |
2357 | pos + count - 1); | |
9ea2d32f MF |
2358 | } |
2359 | ||
2bd63216 | 2360 | /* |
ccd979bd MF |
2361 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
2362 | * function pointer which is called when o_direct io completes so that | |
2363 | * it can unlock our rw lock. (it's the clustered equivalent of | |
2364 | * i_alloc_sem; protects truncate from racing with pending ios). | |
2365 | * Unfortunately there are error cases which call end_io and others | |
2366 | * that don't. so we don't have to unlock the rw_lock if either an | |
2367 | * async dio is going to do it in the future or an end_io after an | |
2368 | * error has already done it. | |
2369 | */ | |
66b116c9 | 2370 | if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { |
ccd979bd MF |
2371 | rw_level = -1; |
2372 | have_alloc_sem = 0; | |
2373 | } | |
2374 | ||
2375 | out: | |
9517bac6 MF |
2376 | if (rw_level != -1) |
2377 | ocfs2_rw_unlock(inode, rw_level); | |
2378 | ||
2379 | out_sems: | |
ccd979bd MF |
2380 | if (have_alloc_sem) |
2381 | up_read(&inode->i_alloc_sem); | |
9517bac6 | 2382 | |
1b1dcc1b | 2383 | mutex_unlock(&inode->i_mutex); |
ccd979bd | 2384 | |
812e7a6a WW |
2385 | if (written) |
2386 | ret = written; | |
ccd979bd | 2387 | mlog_exit(ret); |
812e7a6a | 2388 | return ret; |
ccd979bd MF |
2389 | } |
2390 | ||
328eaaba MS |
2391 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
2392 | struct file *out, | |
2393 | struct splice_desc *sd) | |
2394 | { | |
2395 | int ret; | |
2396 | ||
2397 | ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, &sd->pos, | |
86470e98 | 2398 | sd->total_len, 0, NULL, NULL); |
328eaaba MS |
2399 | if (ret < 0) { |
2400 | mlog_errno(ret); | |
2401 | return ret; | |
2402 | } | |
2403 | ||
2404 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); | |
2405 | } | |
2406 | ||
8659ac25 TY |
2407 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
2408 | struct file *out, | |
2409 | loff_t *ppos, | |
2410 | size_t len, | |
2411 | unsigned int flags) | |
2412 | { | |
2413 | int ret; | |
328eaaba MS |
2414 | struct address_space *mapping = out->f_mapping; |
2415 | struct inode *inode = mapping->host; | |
2416 | struct splice_desc sd = { | |
2417 | .total_len = len, | |
2418 | .flags = flags, | |
2419 | .pos = *ppos, | |
2420 | .u.file = out, | |
2421 | }; | |
8659ac25 TY |
2422 | |
2423 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe, | |
2424 | (unsigned int)len, | |
d28c9174 JS |
2425 | out->f_path.dentry->d_name.len, |
2426 | out->f_path.dentry->d_name.name); | |
8659ac25 | 2427 | |
328eaaba MS |
2428 | if (pipe->inode) |
2429 | mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT); | |
8659ac25 | 2430 | |
328eaaba MS |
2431 | splice_from_pipe_begin(&sd); |
2432 | do { | |
2433 | ret = splice_from_pipe_next(pipe, &sd); | |
2434 | if (ret <= 0) | |
2435 | break; | |
8659ac25 | 2436 | |
328eaaba MS |
2437 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
2438 | ret = ocfs2_rw_lock(inode, 1); | |
2439 | if (ret < 0) | |
2440 | mlog_errno(ret); | |
2441 | else { | |
2442 | ret = ocfs2_splice_to_file(pipe, out, &sd); | |
2443 | ocfs2_rw_unlock(inode, 1); | |
2444 | } | |
2445 | mutex_unlock(&inode->i_mutex); | |
2446 | } while (ret > 0); | |
2447 | splice_from_pipe_end(pipe, &sd); | |
8659ac25 | 2448 | |
7bfac9ec MS |
2449 | if (pipe->inode) |
2450 | mutex_unlock(&pipe->inode->i_mutex); | |
8659ac25 | 2451 | |
328eaaba MS |
2452 | if (sd.num_spliced) |
2453 | ret = sd.num_spliced; | |
2454 | ||
2455 | if (ret > 0) { | |
2456 | unsigned long nr_pages; | |
d23c937b | 2457 | int err; |
328eaaba | 2458 | |
328eaaba MS |
2459 | nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
2460 | ||
d23c937b JK |
2461 | err = generic_write_sync(out, *ppos, ret); |
2462 | if (err) | |
2463 | ret = err; | |
2464 | else | |
2465 | *ppos += ret; | |
328eaaba | 2466 | |
328eaaba MS |
2467 | balance_dirty_pages_ratelimited_nr(mapping, nr_pages); |
2468 | } | |
8659ac25 TY |
2469 | |
2470 | mlog_exit(ret); | |
2471 | return ret; | |
2472 | } | |
2473 | ||
2474 | static ssize_t ocfs2_file_splice_read(struct file *in, | |
2475 | loff_t *ppos, | |
2476 | struct pipe_inode_info *pipe, | |
2477 | size_t len, | |
2478 | unsigned int flags) | |
2479 | { | |
1962f39a | 2480 | int ret = 0, lock_level = 0; |
d28c9174 | 2481 | struct inode *inode = in->f_path.dentry->d_inode; |
8659ac25 TY |
2482 | |
2483 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe, | |
2484 | (unsigned int)len, | |
d28c9174 JS |
2485 | in->f_path.dentry->d_name.len, |
2486 | in->f_path.dentry->d_name.name); | |
8659ac25 TY |
2487 | |
2488 | /* | |
2489 | * See the comment in ocfs2_file_aio_read() | |
2490 | */ | |
1962f39a | 2491 | ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level); |
8659ac25 TY |
2492 | if (ret < 0) { |
2493 | mlog_errno(ret); | |
2494 | goto bail; | |
2495 | } | |
1962f39a | 2496 | ocfs2_inode_unlock(inode, lock_level); |
8659ac25 TY |
2497 | |
2498 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); | |
2499 | ||
2500 | bail: | |
2501 | mlog_exit(ret); | |
2502 | return ret; | |
2503 | } | |
2504 | ||
ccd979bd | 2505 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
027445c3 BP |
2506 | const struct iovec *iov, |
2507 | unsigned long nr_segs, | |
ccd979bd MF |
2508 | loff_t pos) |
2509 | { | |
25899dee | 2510 | int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0; |
ccd979bd | 2511 | struct file *filp = iocb->ki_filp; |
d28c9174 | 2512 | struct inode *inode = filp->f_path.dentry->d_inode; |
ccd979bd | 2513 | |
027445c3 BP |
2514 | mlog_entry("(0x%p, %u, '%.*s')\n", filp, |
2515 | (unsigned int)nr_segs, | |
d28c9174 JS |
2516 | filp->f_path.dentry->d_name.len, |
2517 | filp->f_path.dentry->d_name.name); | |
ccd979bd MF |
2518 | |
2519 | if (!inode) { | |
2520 | ret = -EINVAL; | |
2521 | mlog_errno(ret); | |
2522 | goto bail; | |
2523 | } | |
2524 | ||
2bd63216 | 2525 | /* |
ccd979bd MF |
2526 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
2527 | * need locks to protect pending reads from racing with truncate. | |
2528 | */ | |
2529 | if (filp->f_flags & O_DIRECT) { | |
2530 | down_read(&inode->i_alloc_sem); | |
2531 | have_alloc_sem = 1; | |
2532 | ||
2533 | ret = ocfs2_rw_lock(inode, 0); | |
2534 | if (ret < 0) { | |
2535 | mlog_errno(ret); | |
2536 | goto bail; | |
2537 | } | |
2538 | rw_level = 0; | |
2539 | /* communicate with ocfs2_dio_end_io */ | |
7cdfc3a1 | 2540 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd MF |
2541 | } |
2542 | ||
c4374f8a MF |
2543 | /* |
2544 | * We're fine letting folks race truncates and extending | |
2545 | * writes with read across the cluster, just like they can | |
2546 | * locally. Hence no rw_lock during read. | |
2bd63216 | 2547 | * |
c4374f8a MF |
2548 | * Take and drop the meta data lock to update inode fields |
2549 | * like i_size. This allows the checks down below | |
2bd63216 | 2550 | * generic_file_aio_read() a chance of actually working. |
c4374f8a | 2551 | */ |
e63aecb6 | 2552 | ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
c4374f8a MF |
2553 | if (ret < 0) { |
2554 | mlog_errno(ret); | |
2555 | goto bail; | |
2556 | } | |
e63aecb6 | 2557 | ocfs2_inode_unlock(inode, lock_level); |
c4374f8a | 2558 | |
027445c3 | 2559 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
ccd979bd | 2560 | if (ret == -EINVAL) |
56753bd3 | 2561 | mlog(0, "generic_file_aio_read returned -EINVAL\n"); |
ccd979bd MF |
2562 | |
2563 | /* buffered aio wouldn't have proper lock coverage today */ | |
2564 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); | |
2565 | ||
2566 | /* see ocfs2_file_aio_write */ | |
2567 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { | |
2568 | rw_level = -1; | |
2569 | have_alloc_sem = 0; | |
2570 | } | |
2571 | ||
2572 | bail: | |
2573 | if (have_alloc_sem) | |
2574 | up_read(&inode->i_alloc_sem); | |
2bd63216 | 2575 | if (rw_level != -1) |
ccd979bd MF |
2576 | ocfs2_rw_unlock(inode, rw_level); |
2577 | mlog_exit(ret); | |
2578 | ||
2579 | return ret; | |
2580 | } | |
2581 | ||
92e1d5be | 2582 | const struct inode_operations ocfs2_file_iops = { |
ccd979bd MF |
2583 | .setattr = ocfs2_setattr, |
2584 | .getattr = ocfs2_getattr, | |
d38eb8db | 2585 | .permission = ocfs2_permission, |
cf1d6c76 TY |
2586 | .setxattr = generic_setxattr, |
2587 | .getxattr = generic_getxattr, | |
2588 | .listxattr = ocfs2_listxattr, | |
2589 | .removexattr = generic_removexattr, | |
385820a3 | 2590 | .fallocate = ocfs2_fallocate, |
00dc417f | 2591 | .fiemap = ocfs2_fiemap, |
ccd979bd MF |
2592 | }; |
2593 | ||
92e1d5be | 2594 | const struct inode_operations ocfs2_special_file_iops = { |
ccd979bd MF |
2595 | .setattr = ocfs2_setattr, |
2596 | .getattr = ocfs2_getattr, | |
d38eb8db | 2597 | .permission = ocfs2_permission, |
ccd979bd MF |
2598 | }; |
2599 | ||
53da4939 MF |
2600 | /* |
2601 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with | |
2602 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! | |
2603 | */ | |
4b6f5d20 | 2604 | const struct file_operations ocfs2_fops = { |
32c3c0e2 | 2605 | .llseek = generic_file_llseek, |
ccd979bd MF |
2606 | .read = do_sync_read, |
2607 | .write = do_sync_write, | |
ccd979bd MF |
2608 | .mmap = ocfs2_mmap, |
2609 | .fsync = ocfs2_sync_file, | |
2610 | .release = ocfs2_file_release, | |
2611 | .open = ocfs2_file_open, | |
2612 | .aio_read = ocfs2_file_aio_read, | |
2613 | .aio_write = ocfs2_file_aio_write, | |
c9ec1488 | 2614 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2615 | #ifdef CONFIG_COMPAT |
2616 | .compat_ioctl = ocfs2_compat_ioctl, | |
2617 | #endif | |
53da4939 | 2618 | .lock = ocfs2_lock, |
53fc622b | 2619 | .flock = ocfs2_flock, |
8659ac25 TY |
2620 | .splice_read = ocfs2_file_splice_read, |
2621 | .splice_write = ocfs2_file_splice_write, | |
ccd979bd MF |
2622 | }; |
2623 | ||
4b6f5d20 | 2624 | const struct file_operations ocfs2_dops = { |
32c3c0e2 | 2625 | .llseek = generic_file_llseek, |
ccd979bd MF |
2626 | .read = generic_read_dir, |
2627 | .readdir = ocfs2_readdir, | |
2628 | .fsync = ocfs2_sync_file, | |
53fc622b MF |
2629 | .release = ocfs2_dir_release, |
2630 | .open = ocfs2_dir_open, | |
c9ec1488 | 2631 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2632 | #ifdef CONFIG_COMPAT |
2633 | .compat_ioctl = ocfs2_compat_ioctl, | |
53da4939 MF |
2634 | #endif |
2635 | .lock = ocfs2_lock, | |
2636 | .flock = ocfs2_flock, | |
2637 | }; | |
2638 | ||
2639 | /* | |
2640 | * POSIX-lockless variants of our file_operations. | |
2641 | * | |
2642 | * These will be used if the underlying cluster stack does not support | |
2643 | * posix file locking, if the user passes the "localflocks" mount | |
2644 | * option, or if we have a local-only fs. | |
2645 | * | |
2646 | * ocfs2_flock is in here because all stacks handle UNIX file locks, | |
2647 | * so we still want it in the case of no stack support for | |
2648 | * plocks. Internally, it will do the right thing when asked to ignore | |
2649 | * the cluster. | |
2650 | */ | |
2651 | const struct file_operations ocfs2_fops_no_plocks = { | |
2652 | .llseek = generic_file_llseek, | |
2653 | .read = do_sync_read, | |
2654 | .write = do_sync_write, | |
2655 | .mmap = ocfs2_mmap, | |
2656 | .fsync = ocfs2_sync_file, | |
2657 | .release = ocfs2_file_release, | |
2658 | .open = ocfs2_file_open, | |
2659 | .aio_read = ocfs2_file_aio_read, | |
2660 | .aio_write = ocfs2_file_aio_write, | |
2661 | .unlocked_ioctl = ocfs2_ioctl, | |
2662 | #ifdef CONFIG_COMPAT | |
2663 | .compat_ioctl = ocfs2_compat_ioctl, | |
2664 | #endif | |
2665 | .flock = ocfs2_flock, | |
2666 | .splice_read = ocfs2_file_splice_read, | |
2667 | .splice_write = ocfs2_file_splice_write, | |
2668 | }; | |
2669 | ||
2670 | const struct file_operations ocfs2_dops_no_plocks = { | |
2671 | .llseek = generic_file_llseek, | |
2672 | .read = generic_read_dir, | |
2673 | .readdir = ocfs2_readdir, | |
2674 | .fsync = ocfs2_sync_file, | |
2675 | .release = ocfs2_dir_release, | |
2676 | .open = ocfs2_dir_open, | |
2677 | .unlocked_ioctl = ocfs2_ioctl, | |
2678 | #ifdef CONFIG_COMPAT | |
2679 | .compat_ioctl = ocfs2_compat_ioctl, | |
586d232b | 2680 | #endif |
53fc622b | 2681 | .flock = ocfs2_flock, |
ccd979bd | 2682 | }; |