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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 | 40 | |
ccd979bd MF |
41 | #include <cluster/masklog.h> |
42 | ||
43 | #include "ocfs2.h" | |
44 | ||
45 | #include "alloc.h" | |
46 | #include "aops.h" | |
47 | #include "dir.h" | |
48 | #include "dlmglue.h" | |
49 | #include "extent_map.h" | |
50 | #include "file.h" | |
51 | #include "sysfile.h" | |
52 | #include "inode.h" | |
ca4d147e | 53 | #include "ioctl.h" |
ccd979bd | 54 | #include "journal.h" |
53fc622b | 55 | #include "locks.h" |
ccd979bd MF |
56 | #include "mmap.h" |
57 | #include "suballoc.h" | |
58 | #include "super.h" | |
cf1d6c76 | 59 | #include "xattr.h" |
23fc2702 | 60 | #include "acl.h" |
a90714c1 | 61 | #include "quota.h" |
293b2f70 | 62 | #include "refcounttree.h" |
468eedde | 63 | #include "ocfs2_trace.h" |
ccd979bd MF |
64 | |
65 | #include "buffer_head_io.h" | |
66 | ||
53fc622b MF |
67 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
68 | { | |
69 | struct ocfs2_file_private *fp; | |
70 | ||
71 | fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL); | |
72 | if (!fp) | |
73 | return -ENOMEM; | |
74 | ||
75 | fp->fp_file = file; | |
76 | mutex_init(&fp->fp_mutex); | |
77 | ocfs2_file_lock_res_init(&fp->fp_flock, fp); | |
78 | file->private_data = fp; | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | static void ocfs2_free_file_private(struct inode *inode, struct file *file) | |
84 | { | |
85 | struct ocfs2_file_private *fp = file->private_data; | |
86 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
87 | ||
88 | if (fp) { | |
89 | ocfs2_simple_drop_lockres(osb, &fp->fp_flock); | |
90 | ocfs2_lock_res_free(&fp->fp_flock); | |
91 | kfree(fp); | |
92 | file->private_data = NULL; | |
93 | } | |
94 | } | |
95 | ||
ccd979bd MF |
96 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
97 | { | |
98 | int status; | |
99 | int mode = file->f_flags; | |
100 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
101 | ||
468eedde TM |
102 | trace_ocfs2_file_open(inode, file, file->f_path.dentry, |
103 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
104 | file->f_path.dentry->d_name.len, | |
105 | file->f_path.dentry->d_name.name, mode); | |
ccd979bd | 106 | |
907f4554 | 107 | if (file->f_mode & FMODE_WRITE) |
871a2931 | 108 | dquot_initialize(inode); |
907f4554 | 109 | |
ccd979bd MF |
110 | spin_lock(&oi->ip_lock); |
111 | ||
112 | /* Check that the inode hasn't been wiped from disk by another | |
113 | * node. If it hasn't then we're safe as long as we hold the | |
114 | * spin lock until our increment of open count. */ | |
115 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { | |
116 | spin_unlock(&oi->ip_lock); | |
117 | ||
118 | status = -ENOENT; | |
119 | goto leave; | |
120 | } | |
121 | ||
122 | if (mode & O_DIRECT) | |
123 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; | |
124 | ||
125 | oi->ip_open_count++; | |
126 | spin_unlock(&oi->ip_lock); | |
53fc622b MF |
127 | |
128 | status = ocfs2_init_file_private(inode, file); | |
129 | if (status) { | |
130 | /* | |
131 | * We want to set open count back if we're failing the | |
132 | * open. | |
133 | */ | |
134 | spin_lock(&oi->ip_lock); | |
135 | oi->ip_open_count--; | |
136 | spin_unlock(&oi->ip_lock); | |
137 | } | |
138 | ||
ccd979bd | 139 | leave: |
ccd979bd MF |
140 | return status; |
141 | } | |
142 | ||
143 | static int ocfs2_file_release(struct inode *inode, struct file *file) | |
144 | { | |
145 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
146 | ||
ccd979bd MF |
147 | spin_lock(&oi->ip_lock); |
148 | if (!--oi->ip_open_count) | |
149 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; | |
468eedde TM |
150 | |
151 | trace_ocfs2_file_release(inode, file, file->f_path.dentry, | |
152 | oi->ip_blkno, | |
153 | file->f_path.dentry->d_name.len, | |
154 | file->f_path.dentry->d_name.name, | |
155 | oi->ip_open_count); | |
ccd979bd MF |
156 | spin_unlock(&oi->ip_lock); |
157 | ||
53fc622b MF |
158 | ocfs2_free_file_private(inode, file); |
159 | ||
ccd979bd MF |
160 | return 0; |
161 | } | |
162 | ||
53fc622b MF |
163 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
164 | { | |
165 | return ocfs2_init_file_private(inode, file); | |
166 | } | |
167 | ||
168 | static int ocfs2_dir_release(struct inode *inode, struct file *file) | |
169 | { | |
170 | ocfs2_free_file_private(inode, file); | |
171 | return 0; | |
172 | } | |
173 | ||
7ea80859 | 174 | static int ocfs2_sync_file(struct file *file, int datasync) |
ccd979bd MF |
175 | { |
176 | int err = 0; | |
177 | journal_t *journal; | |
7ea80859 | 178 | struct inode *inode = file->f_mapping->host; |
ccd979bd MF |
179 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
180 | ||
468eedde TM |
181 | trace_ocfs2_sync_file(inode, file, file->f_path.dentry, |
182 | OCFS2_I(inode)->ip_blkno, | |
183 | file->f_path.dentry->d_name.len, | |
184 | file->f_path.dentry->d_name.name, | |
185 | (unsigned long long)datasync); | |
ccd979bd | 186 | |
04eda1a1 JK |
187 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) { |
188 | /* | |
189 | * We still have to flush drive's caches to get data to the | |
190 | * platter | |
191 | */ | |
192 | if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) | |
f8cae0f0 | 193 | blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
e04cc15f | 194 | goto bail; |
04eda1a1 | 195 | } |
e04cc15f | 196 | |
ccd979bd | 197 | journal = osb->journal->j_journal; |
2b4e30fb | 198 | err = jbd2_journal_force_commit(journal); |
ccd979bd MF |
199 | |
200 | bail: | |
c1e8d35e TM |
201 | if (err) |
202 | mlog_errno(err); | |
ccd979bd MF |
203 | |
204 | return (err < 0) ? -EIO : 0; | |
205 | } | |
206 | ||
7f1a37e3 TY |
207 | int ocfs2_should_update_atime(struct inode *inode, |
208 | struct vfsmount *vfsmnt) | |
209 | { | |
210 | struct timespec now; | |
211 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
212 | ||
213 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
214 | return 0; | |
215 | ||
216 | if ((inode->i_flags & S_NOATIME) || | |
217 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
218 | return 0; | |
219 | ||
6c2aad05 MF |
220 | /* |
221 | * We can be called with no vfsmnt structure - NFSD will | |
222 | * sometimes do this. | |
223 | * | |
224 | * Note that our action here is different than touch_atime() - | |
225 | * if we can't tell whether this is a noatime mount, then we | |
226 | * don't know whether to trust the value of s_atime_quantum. | |
227 | */ | |
228 | if (vfsmnt == NULL) | |
229 | return 0; | |
230 | ||
7f1a37e3 TY |
231 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
232 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
233 | return 0; | |
234 | ||
7e913c53 MF |
235 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
236 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || | |
237 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) | |
238 | return 1; | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
7f1a37e3 TY |
243 | now = CURRENT_TIME; |
244 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) | |
245 | return 0; | |
246 | else | |
247 | return 1; | |
248 | } | |
249 | ||
250 | int ocfs2_update_inode_atime(struct inode *inode, | |
251 | struct buffer_head *bh) | |
252 | { | |
253 | int ret; | |
254 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
255 | handle_t *handle; | |
c11e9faf | 256 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
7f1a37e3 | 257 | |
7f1a37e3 | 258 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
259 | if (IS_ERR(handle)) { |
260 | ret = PTR_ERR(handle); | |
7f1a37e3 TY |
261 | mlog_errno(ret); |
262 | goto out; | |
263 | } | |
264 | ||
0cf2f763 | 265 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 266 | OCFS2_JOURNAL_ACCESS_WRITE); |
c11e9faf MF |
267 | if (ret) { |
268 | mlog_errno(ret); | |
269 | goto out_commit; | |
270 | } | |
271 | ||
272 | /* | |
273 | * Don't use ocfs2_mark_inode_dirty() here as we don't always | |
274 | * have i_mutex to guard against concurrent changes to other | |
275 | * inode fields. | |
276 | */ | |
7f1a37e3 | 277 | inode->i_atime = CURRENT_TIME; |
c11e9faf MF |
278 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
279 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); | |
ec20cec7 | 280 | ocfs2_journal_dirty(handle, bh); |
7f1a37e3 | 281 | |
c11e9faf | 282 | out_commit: |
7f1a37e3 TY |
283 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
284 | out: | |
7f1a37e3 TY |
285 | return ret; |
286 | } | |
287 | ||
6cb129f5 AB |
288 | static int ocfs2_set_inode_size(handle_t *handle, |
289 | struct inode *inode, | |
290 | struct buffer_head *fe_bh, | |
291 | u64 new_i_size) | |
ccd979bd MF |
292 | { |
293 | int status; | |
294 | ||
ccd979bd | 295 | i_size_write(inode, new_i_size); |
8110b073 | 296 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
297 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
298 | ||
299 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
300 | if (status < 0) { | |
301 | mlog_errno(status); | |
302 | goto bail; | |
303 | } | |
304 | ||
305 | bail: | |
ccd979bd MF |
306 | return status; |
307 | } | |
308 | ||
9e33d69f JK |
309 | int ocfs2_simple_size_update(struct inode *inode, |
310 | struct buffer_head *di_bh, | |
311 | u64 new_i_size) | |
ccd979bd MF |
312 | { |
313 | int ret; | |
314 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 315 | handle_t *handle = NULL; |
ccd979bd | 316 | |
65eff9cc | 317 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
318 | if (IS_ERR(handle)) { |
319 | ret = PTR_ERR(handle); | |
ccd979bd MF |
320 | mlog_errno(ret); |
321 | goto out; | |
322 | } | |
323 | ||
324 | ret = ocfs2_set_inode_size(handle, inode, di_bh, | |
325 | new_i_size); | |
326 | if (ret < 0) | |
327 | mlog_errno(ret); | |
328 | ||
02dc1af4 | 329 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
330 | out: |
331 | return ret; | |
332 | } | |
333 | ||
37f8a2bf TM |
334 | static int ocfs2_cow_file_pos(struct inode *inode, |
335 | struct buffer_head *fe_bh, | |
336 | u64 offset) | |
337 | { | |
338 | int status; | |
339 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
340 | unsigned int num_clusters = 0; | |
341 | unsigned int ext_flags = 0; | |
342 | ||
343 | /* | |
344 | * If the new offset is aligned to the range of the cluster, there is | |
345 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to | |
346 | * CoW either. | |
347 | */ | |
348 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) | |
349 | return 0; | |
350 | ||
351 | status = ocfs2_get_clusters(inode, cpos, &phys, | |
352 | &num_clusters, &ext_flags); | |
353 | if (status) { | |
354 | mlog_errno(status); | |
355 | goto out; | |
356 | } | |
357 | ||
358 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
359 | goto out; | |
360 | ||
15502712 | 361 | return ocfs2_refcount_cow(inode, NULL, fe_bh, cpos, 1, cpos+1); |
37f8a2bf TM |
362 | |
363 | out: | |
364 | return status; | |
365 | } | |
366 | ||
ccd979bd MF |
367 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
368 | struct inode *inode, | |
369 | struct buffer_head *fe_bh, | |
370 | u64 new_i_size) | |
371 | { | |
372 | int status; | |
1fabe148 | 373 | handle_t *handle; |
60b11392 | 374 | struct ocfs2_dinode *di; |
35edec1d | 375 | u64 cluster_bytes; |
ccd979bd | 376 | |
37f8a2bf TM |
377 | /* |
378 | * We need to CoW the cluster contains the offset if it is reflinked | |
379 | * since we will call ocfs2_zero_range_for_truncate later which will | |
380 | * write "0" from offset to the end of the cluster. | |
381 | */ | |
382 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); | |
383 | if (status) { | |
384 | mlog_errno(status); | |
385 | return status; | |
386 | } | |
387 | ||
ccd979bd MF |
388 | /* TODO: This needs to actually orphan the inode in this |
389 | * transaction. */ | |
390 | ||
65eff9cc | 391 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ccd979bd MF |
392 | if (IS_ERR(handle)) { |
393 | status = PTR_ERR(handle); | |
394 | mlog_errno(status); | |
395 | goto out; | |
396 | } | |
397 | ||
0cf2f763 | 398 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
13723d00 | 399 | OCFS2_JOURNAL_ACCESS_WRITE); |
60b11392 MF |
400 | if (status < 0) { |
401 | mlog_errno(status); | |
402 | goto out_commit; | |
403 | } | |
404 | ||
405 | /* | |
406 | * Do this before setting i_size. | |
407 | */ | |
35edec1d MF |
408 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
409 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, | |
410 | cluster_bytes); | |
60b11392 MF |
411 | if (status) { |
412 | mlog_errno(status); | |
413 | goto out_commit; | |
414 | } | |
415 | ||
416 | i_size_write(inode, new_i_size); | |
60b11392 MF |
417 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
418 | ||
419 | di = (struct ocfs2_dinode *) fe_bh->b_data; | |
420 | di->i_size = cpu_to_le64(new_i_size); | |
421 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); | |
422 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
423 | ||
ec20cec7 | 424 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 425 | |
60b11392 | 426 | out_commit: |
02dc1af4 | 427 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 428 | out: |
ccd979bd MF |
429 | return status; |
430 | } | |
431 | ||
432 | static int ocfs2_truncate_file(struct inode *inode, | |
433 | struct buffer_head *di_bh, | |
434 | u64 new_i_size) | |
435 | { | |
436 | int status = 0; | |
437 | struct ocfs2_dinode *fe = NULL; | |
438 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
ccd979bd | 439 | |
b657c95c JB |
440 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
441 | * already validated it */ | |
ccd979bd | 442 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
ccd979bd | 443 | |
468eedde TM |
444 | trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno, |
445 | (unsigned long long)le64_to_cpu(fe->i_size), | |
446 | (unsigned long long)new_i_size); | |
447 | ||
ccd979bd | 448 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), |
b0697053 MF |
449 | "Inode %llu, inode i_size = %lld != di " |
450 | "i_size = %llu, i_flags = 0x%x\n", | |
451 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ccd979bd | 452 | i_size_read(inode), |
b0697053 MF |
453 | (unsigned long long)le64_to_cpu(fe->i_size), |
454 | le32_to_cpu(fe->i_flags)); | |
ccd979bd MF |
455 | |
456 | if (new_i_size > le64_to_cpu(fe->i_size)) { | |
468eedde TM |
457 | trace_ocfs2_truncate_file_error( |
458 | (unsigned long long)le64_to_cpu(fe->i_size), | |
459 | (unsigned long long)new_i_size); | |
ccd979bd MF |
460 | status = -EINVAL; |
461 | mlog_errno(status); | |
462 | goto bail; | |
463 | } | |
464 | ||
ccd979bd MF |
465 | /* lets handle the simple truncate cases before doing any more |
466 | * cluster locking. */ | |
467 | if (new_i_size == le64_to_cpu(fe->i_size)) | |
468 | goto bail; | |
469 | ||
2e89b2e4 MF |
470 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
471 | ||
4fe370af MF |
472 | ocfs2_resv_discard(&osb->osb_la_resmap, |
473 | &OCFS2_I(inode)->ip_la_data_resv); | |
474 | ||
c934a92d MF |
475 | /* |
476 | * The inode lock forced other nodes to sync and drop their | |
477 | * pages, which (correctly) happens even if we have a truncate | |
478 | * without allocation change - ocfs2 cluster sizes can be much | |
479 | * greater than page size, so we have to truncate them | |
480 | * anyway. | |
481 | */ | |
2e89b2e4 MF |
482 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
483 | truncate_inode_pages(inode->i_mapping, new_i_size); | |
484 | ||
1afc32b9 MF |
485 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
486 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, | |
b1967d0e | 487 | i_size_read(inode), 1); |
1afc32b9 MF |
488 | if (status) |
489 | mlog_errno(status); | |
490 | ||
c934a92d | 491 | goto bail_unlock_sem; |
1afc32b9 MF |
492 | } |
493 | ||
ccd979bd MF |
494 | /* alright, we're going to need to do a full blown alloc size |
495 | * change. Orphan the inode so that recovery can complete the | |
496 | * truncate if necessary. This does the task of marking | |
497 | * i_size. */ | |
498 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); | |
499 | if (status < 0) { | |
500 | mlog_errno(status); | |
c934a92d | 501 | goto bail_unlock_sem; |
ccd979bd MF |
502 | } |
503 | ||
78f94673 | 504 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
ccd979bd MF |
505 | if (status < 0) { |
506 | mlog_errno(status); | |
c934a92d | 507 | goto bail_unlock_sem; |
ccd979bd MF |
508 | } |
509 | ||
510 | /* TODO: orphan dir cleanup here. */ | |
c934a92d | 511 | bail_unlock_sem: |
2e89b2e4 MF |
512 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
513 | ||
ccd979bd | 514 | bail: |
8b2c0dba TM |
515 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
516 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
ccd979bd | 517 | |
ccd979bd MF |
518 | return status; |
519 | } | |
520 | ||
521 | /* | |
0eb8d47e | 522 | * extend file allocation only here. |
ccd979bd MF |
523 | * we'll update all the disk stuff, and oip->alloc_size |
524 | * | |
525 | * expect stuff to be locked, a transaction started and enough data / | |
526 | * metadata reservations in the contexts. | |
527 | * | |
528 | * Will return -EAGAIN, and a reason if a restart is needed. | |
529 | * If passed in, *reason will always be set, even in error. | |
530 | */ | |
0eb8d47e TM |
531 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
532 | struct inode *inode, | |
533 | u32 *logical_offset, | |
534 | u32 clusters_to_add, | |
535 | int mark_unwritten, | |
536 | struct buffer_head *fe_bh, | |
537 | handle_t *handle, | |
538 | struct ocfs2_alloc_context *data_ac, | |
539 | struct ocfs2_alloc_context *meta_ac, | |
540 | enum ocfs2_alloc_restarted *reason_ret) | |
ccd979bd | 541 | { |
f99b9b7c JB |
542 | int ret; |
543 | struct ocfs2_extent_tree et; | |
ccd979bd | 544 | |
5e404e9e | 545 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
cbee7e1a JB |
546 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
547 | clusters_to_add, mark_unwritten, | |
548 | data_ac, meta_ac, reason_ret); | |
f99b9b7c JB |
549 | |
550 | return ret; | |
ccd979bd MF |
551 | } |
552 | ||
2ae99a60 MF |
553 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
554 | u32 clusters_to_add, int mark_unwritten) | |
ccd979bd MF |
555 | { |
556 | int status = 0; | |
557 | int restart_func = 0; | |
abf8b156 | 558 | int credits; |
2ae99a60 | 559 | u32 prev_clusters; |
ccd979bd MF |
560 | struct buffer_head *bh = NULL; |
561 | struct ocfs2_dinode *fe = NULL; | |
1fabe148 | 562 | handle_t *handle = NULL; |
ccd979bd MF |
563 | struct ocfs2_alloc_context *data_ac = NULL; |
564 | struct ocfs2_alloc_context *meta_ac = NULL; | |
565 | enum ocfs2_alloc_restarted why; | |
566 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 567 | struct ocfs2_extent_tree et; |
a90714c1 | 568 | int did_quota = 0; |
ccd979bd | 569 | |
dcd0538f MF |
570 | /* |
571 | * This function only exists for file systems which don't | |
572 | * support holes. | |
573 | */ | |
2ae99a60 | 574 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
dcd0538f | 575 | |
b657c95c | 576 | status = ocfs2_read_inode_block(inode, &bh); |
ccd979bd MF |
577 | if (status < 0) { |
578 | mlog_errno(status); | |
579 | goto leave; | |
580 | } | |
ccd979bd | 581 | fe = (struct ocfs2_dinode *) bh->b_data; |
ccd979bd MF |
582 | |
583 | restart_all: | |
584 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); | |
585 | ||
5e404e9e | 586 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
f99b9b7c JB |
587 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
588 | &data_ac, &meta_ac); | |
9517bac6 MF |
589 | if (status) { |
590 | mlog_errno(status); | |
591 | goto leave; | |
592 | } | |
593 | ||
811f933d TM |
594 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list, |
595 | clusters_to_add); | |
65eff9cc | 596 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
597 | if (IS_ERR(handle)) { |
598 | status = PTR_ERR(handle); | |
599 | handle = NULL; | |
600 | mlog_errno(status); | |
601 | goto leave; | |
602 | } | |
603 | ||
604 | restarted_transaction: | |
468eedde TM |
605 | trace_ocfs2_extend_allocation( |
606 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
607 | (unsigned long long)i_size_read(inode), | |
608 | le32_to_cpu(fe->i_clusters), clusters_to_add, | |
609 | why, restart_func); | |
610 | ||
5dd4056d CH |
611 | status = dquot_alloc_space_nodirty(inode, |
612 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); | |
613 | if (status) | |
a90714c1 | 614 | goto leave; |
a90714c1 JK |
615 | did_quota = 1; |
616 | ||
ccd979bd MF |
617 | /* reserve a write to the file entry early on - that we if we |
618 | * run out of credits in the allocation path, we can still | |
619 | * update i_size. */ | |
0cf2f763 | 620 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 621 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
622 | if (status < 0) { |
623 | mlog_errno(status); | |
624 | goto leave; | |
625 | } | |
626 | ||
627 | prev_clusters = OCFS2_I(inode)->ip_clusters; | |
628 | ||
0eb8d47e TM |
629 | status = ocfs2_add_inode_data(osb, |
630 | inode, | |
631 | &logical_start, | |
632 | clusters_to_add, | |
633 | mark_unwritten, | |
634 | bh, | |
635 | handle, | |
636 | data_ac, | |
637 | meta_ac, | |
638 | &why); | |
ccd979bd MF |
639 | if ((status < 0) && (status != -EAGAIN)) { |
640 | if (status != -ENOSPC) | |
641 | mlog_errno(status); | |
642 | goto leave; | |
643 | } | |
644 | ||
ec20cec7 | 645 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
646 | |
647 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
648 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); | |
649 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
a90714c1 | 650 | /* Release unused quota reservation */ |
5dd4056d | 651 | dquot_free_space(inode, |
a90714c1 JK |
652 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
653 | did_quota = 0; | |
ccd979bd MF |
654 | |
655 | if (why != RESTART_NONE && clusters_to_add) { | |
656 | if (why == RESTART_META) { | |
ccd979bd | 657 | restart_func = 1; |
79681842 | 658 | status = 0; |
ccd979bd MF |
659 | } else { |
660 | BUG_ON(why != RESTART_TRANS); | |
661 | ||
ccd979bd MF |
662 | /* TODO: This can be more intelligent. */ |
663 | credits = ocfs2_calc_extend_credits(osb->sb, | |
811f933d | 664 | &fe->id2.i_list, |
ccd979bd | 665 | clusters_to_add); |
1fabe148 | 666 | status = ocfs2_extend_trans(handle, credits); |
ccd979bd MF |
667 | if (status < 0) { |
668 | /* handle still has to be committed at | |
669 | * this point. */ | |
670 | status = -ENOMEM; | |
671 | mlog_errno(status); | |
672 | goto leave; | |
673 | } | |
674 | goto restarted_transaction; | |
675 | } | |
676 | } | |
677 | ||
468eedde | 678 | trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno, |
1ca1a111 | 679 | le32_to_cpu(fe->i_clusters), |
468eedde TM |
680 | (unsigned long long)le64_to_cpu(fe->i_size), |
681 | OCFS2_I(inode)->ip_clusters, | |
682 | (unsigned long long)i_size_read(inode)); | |
ccd979bd MF |
683 | |
684 | leave: | |
a90714c1 | 685 | if (status < 0 && did_quota) |
5dd4056d | 686 | dquot_free_space(inode, |
a90714c1 | 687 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
ccd979bd | 688 | if (handle) { |
02dc1af4 | 689 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
690 | handle = NULL; |
691 | } | |
692 | if (data_ac) { | |
693 | ocfs2_free_alloc_context(data_ac); | |
694 | data_ac = NULL; | |
695 | } | |
696 | if (meta_ac) { | |
697 | ocfs2_free_alloc_context(meta_ac); | |
698 | meta_ac = NULL; | |
699 | } | |
700 | if ((!status) && restart_func) { | |
701 | restart_func = 0; | |
702 | goto restart_all; | |
703 | } | |
a81cb88b MF |
704 | brelse(bh); |
705 | bh = NULL; | |
ccd979bd | 706 | |
ccd979bd MF |
707 | return status; |
708 | } | |
709 | ||
a4bfb4cf JB |
710 | /* |
711 | * While a write will already be ordering the data, a truncate will not. | |
712 | * Thus, we need to explicitly order the zeroed pages. | |
713 | */ | |
714 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode) | |
715 | { | |
716 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
717 | handle_t *handle = NULL; | |
718 | int ret = 0; | |
719 | ||
720 | if (!ocfs2_should_order_data(inode)) | |
721 | goto out; | |
722 | ||
723 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
724 | if (IS_ERR(handle)) { | |
725 | ret = -ENOMEM; | |
726 | mlog_errno(ret); | |
727 | goto out; | |
728 | } | |
729 | ||
730 | ret = ocfs2_jbd2_file_inode(handle, inode); | |
731 | if (ret < 0) | |
732 | mlog_errno(ret); | |
733 | ||
734 | out: | |
735 | if (ret) { | |
736 | if (!IS_ERR(handle)) | |
737 | ocfs2_commit_trans(osb, handle); | |
738 | handle = ERR_PTR(ret); | |
739 | } | |
740 | return handle; | |
741 | } | |
742 | ||
ccd979bd MF |
743 | /* Some parts of this taken from generic_cont_expand, which turned out |
744 | * to be too fragile to do exactly what we need without us having to | |
4e02ed4b | 745 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
a4bfb4cf JB |
746 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
747 | u64 abs_to) | |
ccd979bd MF |
748 | { |
749 | struct address_space *mapping = inode->i_mapping; | |
750 | struct page *page; | |
a4bfb4cf | 751 | unsigned long index = abs_from >> PAGE_CACHE_SHIFT; |
1fabe148 | 752 | handle_t *handle = NULL; |
5453258d | 753 | int ret = 0; |
a4bfb4cf | 754 | unsigned zero_from, zero_to, block_start, block_end; |
ccd979bd | 755 | |
a4bfb4cf JB |
756 | BUG_ON(abs_from >= abs_to); |
757 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT)); | |
758 | BUG_ON(abs_from & (inode->i_blkbits - 1)); | |
ccd979bd | 759 | |
9b4c0ff3 | 760 | page = find_or_create_page(mapping, index, GFP_NOFS); |
ccd979bd MF |
761 | if (!page) { |
762 | ret = -ENOMEM; | |
763 | mlog_errno(ret); | |
764 | goto out; | |
765 | } | |
766 | ||
a4bfb4cf JB |
767 | /* Get the offsets within the page that we want to zero */ |
768 | zero_from = abs_from & (PAGE_CACHE_SIZE - 1); | |
769 | zero_to = abs_to & (PAGE_CACHE_SIZE - 1); | |
770 | if (!zero_to) | |
771 | zero_to = PAGE_CACHE_SIZE; | |
ccd979bd | 772 | |
468eedde TM |
773 | trace_ocfs2_write_zero_page( |
774 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
775 | (unsigned long long)abs_from, | |
776 | (unsigned long long)abs_to, | |
777 | index, zero_from, zero_to); | |
5693486b | 778 | |
a4bfb4cf JB |
779 | /* We know that zero_from is block aligned */ |
780 | for (block_start = zero_from; block_start < zero_to; | |
781 | block_start = block_end) { | |
782 | block_end = block_start + (1 << inode->i_blkbits); | |
783 | ||
784 | /* | |
ebdec241 CH |
785 | * block_start is block-aligned. Bump it by one to force |
786 | * __block_write_begin and block_commit_write to zero the | |
a4bfb4cf JB |
787 | * whole block. |
788 | */ | |
ebdec241 CH |
789 | ret = __block_write_begin(page, block_start + 1, 0, |
790 | ocfs2_get_block); | |
a4bfb4cf JB |
791 | if (ret < 0) { |
792 | mlog_errno(ret); | |
ccd979bd MF |
793 | goto out_unlock; |
794 | } | |
ccd979bd | 795 | |
a4bfb4cf JB |
796 | if (!handle) { |
797 | handle = ocfs2_zero_start_ordered_transaction(inode); | |
798 | if (IS_ERR(handle)) { | |
799 | ret = PTR_ERR(handle); | |
800 | handle = NULL; | |
801 | break; | |
802 | } | |
803 | } | |
804 | ||
805 | /* must not update i_size! */ | |
806 | ret = block_commit_write(page, block_start + 1, | |
807 | block_start + 1); | |
808 | if (ret < 0) | |
809 | mlog_errno(ret); | |
810 | else | |
811 | ret = 0; | |
812 | } | |
ccd979bd MF |
813 | |
814 | if (handle) | |
02dc1af4 | 815 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
a4bfb4cf | 816 | |
ccd979bd MF |
817 | out_unlock: |
818 | unlock_page(page); | |
819 | page_cache_release(page); | |
820 | out: | |
821 | return ret; | |
822 | } | |
823 | ||
5693486b JB |
824 | /* |
825 | * Find the next range to zero. We do this in terms of bytes because | |
826 | * that's what ocfs2_zero_extend() wants, and it is dealing with the | |
827 | * pagecache. We may return multiple extents. | |
828 | * | |
829 | * zero_start and zero_end are ocfs2_zero_extend()s current idea of what | |
830 | * needs to be zeroed. range_start and range_end return the next zeroing | |
831 | * range. A subsequent call should pass the previous range_end as its | |
832 | * zero_start. If range_end is 0, there's nothing to do. | |
833 | * | |
834 | * Unwritten extents are skipped over. Refcounted extents are CoWd. | |
835 | */ | |
836 | static int ocfs2_zero_extend_get_range(struct inode *inode, | |
837 | struct buffer_head *di_bh, | |
838 | u64 zero_start, u64 zero_end, | |
839 | u64 *range_start, u64 *range_end) | |
ccd979bd | 840 | { |
5693486b JB |
841 | int rc = 0, needs_cow = 0; |
842 | u32 p_cpos, zero_clusters = 0; | |
843 | u32 zero_cpos = | |
844 | zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
845 | u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end); | |
846 | unsigned int num_clusters = 0; | |
847 | unsigned int ext_flags = 0; | |
ccd979bd | 848 | |
5693486b JB |
849 | while (zero_cpos < last_cpos) { |
850 | rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos, | |
851 | &num_clusters, &ext_flags); | |
852 | if (rc) { | |
853 | mlog_errno(rc); | |
ccd979bd MF |
854 | goto out; |
855 | } | |
856 | ||
5693486b JB |
857 | if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) { |
858 | zero_clusters = num_clusters; | |
859 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
860 | needs_cow = 1; | |
861 | break; | |
862 | } | |
863 | ||
864 | zero_cpos += num_clusters; | |
865 | } | |
866 | if (!zero_clusters) { | |
867 | *range_end = 0; | |
868 | goto out; | |
869 | } | |
870 | ||
871 | while ((zero_cpos + zero_clusters) < last_cpos) { | |
872 | rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters, | |
873 | &p_cpos, &num_clusters, | |
874 | &ext_flags); | |
875 | if (rc) { | |
876 | mlog_errno(rc); | |
877 | goto out; | |
878 | } | |
879 | ||
880 | if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN)) | |
881 | break; | |
882 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
883 | needs_cow = 1; | |
884 | zero_clusters += num_clusters; | |
885 | } | |
886 | if ((zero_cpos + zero_clusters) > last_cpos) | |
887 | zero_clusters = last_cpos - zero_cpos; | |
888 | ||
889 | if (needs_cow) { | |
15502712 TM |
890 | rc = ocfs2_refcount_cow(inode, NULL, di_bh, zero_cpos, |
891 | zero_clusters, UINT_MAX); | |
5693486b JB |
892 | if (rc) { |
893 | mlog_errno(rc); | |
894 | goto out; | |
895 | } | |
896 | } | |
897 | ||
898 | *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos); | |
899 | *range_end = ocfs2_clusters_to_bytes(inode->i_sb, | |
900 | zero_cpos + zero_clusters); | |
901 | ||
902 | out: | |
903 | return rc; | |
904 | } | |
905 | ||
906 | /* | |
907 | * Zero one range returned from ocfs2_zero_extend_get_range(). The caller | |
908 | * has made sure that the entire range needs zeroing. | |
909 | */ | |
910 | static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start, | |
911 | u64 range_end) | |
912 | { | |
913 | int rc = 0; | |
914 | u64 next_pos; | |
915 | u64 zero_pos = range_start; | |
916 | ||
468eedde TM |
917 | trace_ocfs2_zero_extend_range( |
918 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
919 | (unsigned long long)range_start, | |
920 | (unsigned long long)range_end); | |
5693486b JB |
921 | BUG_ON(range_start >= range_end); |
922 | ||
923 | while (zero_pos < range_end) { | |
924 | next_pos = (zero_pos & PAGE_CACHE_MASK) + PAGE_CACHE_SIZE; | |
925 | if (next_pos > range_end) | |
926 | next_pos = range_end; | |
927 | rc = ocfs2_write_zero_page(inode, zero_pos, next_pos); | |
928 | if (rc < 0) { | |
929 | mlog_errno(rc); | |
930 | break; | |
931 | } | |
932 | zero_pos = next_pos; | |
e2057c5a MF |
933 | |
934 | /* | |
935 | * Very large extends have the potential to lock up | |
936 | * the cpu for extended periods of time. | |
937 | */ | |
938 | cond_resched(); | |
ccd979bd MF |
939 | } |
940 | ||
5693486b JB |
941 | return rc; |
942 | } | |
943 | ||
944 | int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh, | |
945 | loff_t zero_to_size) | |
946 | { | |
947 | int ret = 0; | |
948 | u64 zero_start, range_start = 0, range_end = 0; | |
949 | struct super_block *sb = inode->i_sb; | |
950 | ||
951 | zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); | |
468eedde TM |
952 | trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno, |
953 | (unsigned long long)zero_start, | |
954 | (unsigned long long)i_size_read(inode)); | |
5693486b JB |
955 | while (zero_start < zero_to_size) { |
956 | ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start, | |
957 | zero_to_size, | |
958 | &range_start, | |
959 | &range_end); | |
960 | if (ret) { | |
961 | mlog_errno(ret); | |
962 | break; | |
963 | } | |
964 | if (!range_end) | |
965 | break; | |
966 | /* Trim the ends */ | |
967 | if (range_start < zero_start) | |
968 | range_start = zero_start; | |
969 | if (range_end > zero_to_size) | |
970 | range_end = zero_to_size; | |
971 | ||
972 | ret = ocfs2_zero_extend_range(inode, range_start, | |
973 | range_end); | |
974 | if (ret) { | |
975 | mlog_errno(ret); | |
976 | break; | |
977 | } | |
978 | zero_start = range_end; | |
979 | } | |
980 | ||
ccd979bd MF |
981 | return ret; |
982 | } | |
983 | ||
5693486b JB |
984 | int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh, |
985 | u64 new_i_size, u64 zero_to) | |
65ed39d6 MF |
986 | { |
987 | int ret; | |
988 | u32 clusters_to_add; | |
989 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
990 | ||
5693486b JB |
991 | /* |
992 | * Only quota files call this without a bh, and they can't be | |
993 | * refcounted. | |
994 | */ | |
995 | BUG_ON(!di_bh && (oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); | |
996 | BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE)); | |
997 | ||
65ed39d6 MF |
998 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); |
999 | if (clusters_to_add < oi->ip_clusters) | |
1000 | clusters_to_add = 0; | |
1001 | else | |
1002 | clusters_to_add -= oi->ip_clusters; | |
1003 | ||
1004 | if (clusters_to_add) { | |
1005 | ret = __ocfs2_extend_allocation(inode, oi->ip_clusters, | |
1006 | clusters_to_add, 0); | |
1007 | if (ret) { | |
1008 | mlog_errno(ret); | |
1009 | goto out; | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * Call this even if we don't add any clusters to the tree. We | |
1015 | * still need to zero the area between the old i_size and the | |
1016 | * new i_size. | |
1017 | */ | |
5693486b | 1018 | ret = ocfs2_zero_extend(inode, di_bh, zero_to); |
65ed39d6 MF |
1019 | if (ret < 0) |
1020 | mlog_errno(ret); | |
1021 | ||
1022 | out: | |
1023 | return ret; | |
1024 | } | |
1025 | ||
ccd979bd MF |
1026 | static int ocfs2_extend_file(struct inode *inode, |
1027 | struct buffer_head *di_bh, | |
65ed39d6 | 1028 | u64 new_i_size) |
ccd979bd | 1029 | { |
c934a92d | 1030 | int ret = 0; |
1afc32b9 | 1031 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
ccd979bd | 1032 | |
65ed39d6 | 1033 | BUG_ON(!di_bh); |
53013cba | 1034 | |
ccd979bd MF |
1035 | /* setattr sometimes calls us like this. */ |
1036 | if (new_i_size == 0) | |
1037 | goto out; | |
1038 | ||
1039 | if (i_size_read(inode) == new_i_size) | |
5693486b | 1040 | goto out; |
ccd979bd MF |
1041 | BUG_ON(new_i_size < i_size_read(inode)); |
1042 | ||
0effef77 | 1043 | /* |
65ed39d6 MF |
1044 | * The alloc sem blocks people in read/write from reading our |
1045 | * allocation until we're done changing it. We depend on | |
1046 | * i_mutex to block other extend/truncate calls while we're | |
5693486b JB |
1047 | * here. We even have to hold it for sparse files because there |
1048 | * might be some tail zeroing. | |
0effef77 | 1049 | */ |
1afc32b9 MF |
1050 | down_write(&oi->ip_alloc_sem); |
1051 | ||
1052 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1053 | /* | |
1054 | * We can optimize small extends by keeping the inodes | |
1055 | * inline data. | |
1056 | */ | |
1057 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { | |
1058 | up_write(&oi->ip_alloc_sem); | |
1059 | goto out_update_size; | |
1060 | } | |
1061 | ||
1062 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1063 | if (ret) { | |
1064 | up_write(&oi->ip_alloc_sem); | |
1afc32b9 | 1065 | mlog_errno(ret); |
c934a92d | 1066 | goto out; |
1afc32b9 MF |
1067 | } |
1068 | } | |
1069 | ||
5693486b JB |
1070 | if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
1071 | ret = ocfs2_zero_extend(inode, di_bh, new_i_size); | |
1072 | else | |
1073 | ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size, | |
1074 | new_i_size); | |
1afc32b9 MF |
1075 | |
1076 | up_write(&oi->ip_alloc_sem); | |
65ed39d6 | 1077 | |
0effef77 MF |
1078 | if (ret < 0) { |
1079 | mlog_errno(ret); | |
c934a92d | 1080 | goto out; |
53013cba MF |
1081 | } |
1082 | ||
3a0782d0 | 1083 | out_update_size: |
65ed39d6 MF |
1084 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
1085 | if (ret < 0) | |
1086 | mlog_errno(ret); | |
ccd979bd MF |
1087 | |
1088 | out: | |
1089 | return ret; | |
1090 | } | |
1091 | ||
1092 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1093 | { | |
1094 | int status = 0, size_change; | |
1095 | struct inode *inode = dentry->d_inode; | |
1096 | struct super_block *sb = inode->i_sb; | |
1097 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
1098 | struct buffer_head *bh = NULL; | |
1fabe148 | 1099 | handle_t *handle = NULL; |
65bac575 | 1100 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
52a9ee28 | 1101 | int qtype; |
ccd979bd | 1102 | |
468eedde TM |
1103 | trace_ocfs2_setattr(inode, dentry, |
1104 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1105 | dentry->d_name.len, dentry->d_name.name, | |
1106 | attr->ia_valid, attr->ia_mode, | |
1107 | attr->ia_uid, attr->ia_gid); | |
ccd979bd | 1108 | |
bc535809 SM |
1109 | /* ensuring we don't even attempt to truncate a symlink */ |
1110 | if (S_ISLNK(inode->i_mode)) | |
1111 | attr->ia_valid &= ~ATTR_SIZE; | |
1112 | ||
ccd979bd MF |
1113 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
1114 | | ATTR_GID | ATTR_UID | ATTR_MODE) | |
468eedde | 1115 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) |
ccd979bd | 1116 | return 0; |
ccd979bd MF |
1117 | |
1118 | status = inode_change_ok(inode, attr); | |
1119 | if (status) | |
1120 | return status; | |
1121 | ||
12755627 DM |
1122 | if (is_quota_modification(inode, attr)) |
1123 | dquot_initialize(inode); | |
ccd979bd MF |
1124 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
1125 | if (size_change) { | |
1126 | status = ocfs2_rw_lock(inode, 1); | |
1127 | if (status < 0) { | |
1128 | mlog_errno(status); | |
1129 | goto bail; | |
1130 | } | |
1131 | } | |
1132 | ||
e63aecb6 | 1133 | status = ocfs2_inode_lock(inode, &bh, 1); |
ccd979bd MF |
1134 | if (status < 0) { |
1135 | if (status != -ENOENT) | |
1136 | mlog_errno(status); | |
1137 | goto bail_unlock_rw; | |
1138 | } | |
1139 | ||
1140 | if (size_change && attr->ia_size != i_size_read(inode)) { | |
5051f768 WW |
1141 | status = inode_newsize_ok(inode, attr->ia_size); |
1142 | if (status) | |
ce76fd30 | 1143 | goto bail_unlock; |
ce76fd30 | 1144 | |
562c72aa CH |
1145 | inode_dio_wait(inode); |
1146 | ||
2b4e30fb JB |
1147 | if (i_size_read(inode) > attr->ia_size) { |
1148 | if (ocfs2_should_order_data(inode)) { | |
1149 | status = ocfs2_begin_ordered_truncate(inode, | |
1150 | attr->ia_size); | |
1151 | if (status) | |
1152 | goto bail_unlock; | |
1153 | } | |
ccd979bd | 1154 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
2b4e30fb | 1155 | } else |
65ed39d6 | 1156 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
ccd979bd MF |
1157 | if (status < 0) { |
1158 | if (status != -ENOSPC) | |
1159 | mlog_errno(status); | |
1160 | status = -ENOSPC; | |
1161 | goto bail_unlock; | |
1162 | } | |
1163 | } | |
1164 | ||
a90714c1 JK |
1165 | if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || |
1166 | (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { | |
65bac575 JK |
1167 | /* |
1168 | * Gather pointers to quota structures so that allocation / | |
1169 | * freeing of quota structures happens here and not inside | |
b43fa828 | 1170 | * dquot_transfer() where we have problems with lock ordering |
65bac575 | 1171 | */ |
a90714c1 JK |
1172 | if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid |
1173 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1174 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { | |
65bac575 JK |
1175 | transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid, |
1176 | USRQUOTA); | |
52a9ee28 | 1177 | if (!transfer_to[USRQUOTA]) { |
65bac575 | 1178 | status = -ESRCH; |
a90714c1 | 1179 | goto bail_unlock; |
65bac575 | 1180 | } |
a90714c1 JK |
1181 | } |
1182 | if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid | |
1183 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1184 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { | |
65bac575 JK |
1185 | transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid, |
1186 | GRPQUOTA); | |
52a9ee28 | 1187 | if (!transfer_to[GRPQUOTA]) { |
65bac575 | 1188 | status = -ESRCH; |
a90714c1 | 1189 | goto bail_unlock; |
65bac575 | 1190 | } |
a90714c1 | 1191 | } |
65bac575 JK |
1192 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
1193 | 2 * ocfs2_quota_trans_credits(sb)); | |
a90714c1 JK |
1194 | if (IS_ERR(handle)) { |
1195 | status = PTR_ERR(handle); | |
1196 | mlog_errno(status); | |
1197 | goto bail_unlock; | |
1198 | } | |
52a9ee28 | 1199 | status = __dquot_transfer(inode, transfer_to); |
a90714c1 JK |
1200 | if (status < 0) |
1201 | goto bail_commit; | |
1202 | } else { | |
1203 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1204 | if (IS_ERR(handle)) { | |
1205 | status = PTR_ERR(handle); | |
1206 | mlog_errno(status); | |
1207 | goto bail_unlock; | |
1208 | } | |
ccd979bd MF |
1209 | } |
1210 | ||
7307de80 | 1211 | /* |
2c27c65e | 1212 | * This will intentionally not wind up calling truncate_setsize(), |
7307de80 MF |
1213 | * since all the work for a size change has been done above. |
1214 | * Otherwise, we could get into problems with truncate as | |
1215 | * ip_alloc_sem is used there to protect against i_size | |
1216 | * changes. | |
1025774c CH |
1217 | * |
1218 | * XXX: this means the conditional below can probably be removed. | |
7307de80 | 1219 | */ |
1025774c CH |
1220 | if ((attr->ia_valid & ATTR_SIZE) && |
1221 | attr->ia_size != i_size_read(inode)) { | |
1222 | status = vmtruncate(inode, attr->ia_size); | |
1223 | if (status) { | |
1224 | mlog_errno(status); | |
1225 | goto bail_commit; | |
1226 | } | |
ccd979bd MF |
1227 | } |
1228 | ||
1025774c CH |
1229 | setattr_copy(inode, attr); |
1230 | mark_inode_dirty(inode); | |
1231 | ||
ccd979bd MF |
1232 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
1233 | if (status < 0) | |
1234 | mlog_errno(status); | |
1235 | ||
1236 | bail_commit: | |
02dc1af4 | 1237 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1238 | bail_unlock: |
e63aecb6 | 1239 | ocfs2_inode_unlock(inode, 1); |
ccd979bd MF |
1240 | bail_unlock_rw: |
1241 | if (size_change) | |
1242 | ocfs2_rw_unlock(inode, 1); | |
1243 | bail: | |
a81cb88b | 1244 | brelse(bh); |
ccd979bd | 1245 | |
65bac575 | 1246 | /* Release quota pointers in case we acquired them */ |
52a9ee28 | 1247 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) |
65bac575 | 1248 | dqput(transfer_to[qtype]); |
65bac575 | 1249 | |
060bc66d TY |
1250 | if (!status && attr->ia_valid & ATTR_MODE) { |
1251 | status = ocfs2_acl_chmod(inode); | |
1252 | if (status < 0) | |
1253 | mlog_errno(status); | |
1254 | } | |
1255 | ||
ccd979bd MF |
1256 | return status; |
1257 | } | |
1258 | ||
1259 | int ocfs2_getattr(struct vfsmount *mnt, | |
1260 | struct dentry *dentry, | |
1261 | struct kstat *stat) | |
1262 | { | |
1263 | struct inode *inode = dentry->d_inode; | |
1264 | struct super_block *sb = dentry->d_inode->i_sb; | |
1265 | struct ocfs2_super *osb = sb->s_fs_info; | |
1266 | int err; | |
1267 | ||
ccd979bd MF |
1268 | err = ocfs2_inode_revalidate(dentry); |
1269 | if (err) { | |
1270 | if (err != -ENOENT) | |
1271 | mlog_errno(err); | |
1272 | goto bail; | |
1273 | } | |
1274 | ||
1275 | generic_fillattr(inode, stat); | |
1276 | ||
1277 | /* We set the blksize from the cluster size for performance */ | |
1278 | stat->blksize = osb->s_clustersize; | |
1279 | ||
1280 | bail: | |
ccd979bd MF |
1281 | return err; |
1282 | } | |
1283 | ||
10556cb2 | 1284 | int ocfs2_permission(struct inode *inode, int mask) |
d38eb8db TY |
1285 | { |
1286 | int ret; | |
1287 | ||
10556cb2 | 1288 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
1289 | return -ECHILD; |
1290 | ||
e63aecb6 | 1291 | ret = ocfs2_inode_lock(inode, NULL, 0); |
d38eb8db | 1292 | if (ret) { |
a9f5f707 MF |
1293 | if (ret != -ENOENT) |
1294 | mlog_errno(ret); | |
d38eb8db TY |
1295 | goto out; |
1296 | } | |
1297 | ||
2830ba7f | 1298 | ret = generic_permission(inode, mask); |
d38eb8db | 1299 | |
e63aecb6 | 1300 | ocfs2_inode_unlock(inode, 0); |
d38eb8db | 1301 | out: |
d38eb8db TY |
1302 | return ret; |
1303 | } | |
1304 | ||
b2580103 MF |
1305 | static int __ocfs2_write_remove_suid(struct inode *inode, |
1306 | struct buffer_head *bh) | |
ccd979bd MF |
1307 | { |
1308 | int ret; | |
1fabe148 | 1309 | handle_t *handle; |
ccd979bd MF |
1310 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1311 | struct ocfs2_dinode *di; | |
1312 | ||
468eedde TM |
1313 | trace_ocfs2_write_remove_suid( |
1314 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1315 | inode->i_mode); | |
ccd979bd | 1316 | |
65eff9cc | 1317 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
1318 | if (IS_ERR(handle)) { |
1319 | ret = PTR_ERR(handle); | |
ccd979bd MF |
1320 | mlog_errno(ret); |
1321 | goto out; | |
1322 | } | |
1323 | ||
0cf2f763 | 1324 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 1325 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1326 | if (ret < 0) { |
1327 | mlog_errno(ret); | |
b2580103 | 1328 | goto out_trans; |
ccd979bd MF |
1329 | } |
1330 | ||
1331 | inode->i_mode &= ~S_ISUID; | |
1332 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) | |
1333 | inode->i_mode &= ~S_ISGID; | |
1334 | ||
1335 | di = (struct ocfs2_dinode *) bh->b_data; | |
1336 | di->i_mode = cpu_to_le16(inode->i_mode); | |
1337 | ||
ec20cec7 | 1338 | ocfs2_journal_dirty(handle, bh); |
b2580103 | 1339 | |
ccd979bd | 1340 | out_trans: |
02dc1af4 | 1341 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1342 | out: |
ccd979bd MF |
1343 | return ret; |
1344 | } | |
1345 | ||
9517bac6 MF |
1346 | /* |
1347 | * Will look for holes and unwritten extents in the range starting at | |
1348 | * pos for count bytes (inclusive). | |
1349 | */ | |
1350 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, | |
1351 | size_t count) | |
1352 | { | |
1353 | int ret = 0; | |
49cb8d2d | 1354 | unsigned int extent_flags; |
9517bac6 MF |
1355 | u32 cpos, clusters, extent_len, phys_cpos; |
1356 | struct super_block *sb = inode->i_sb; | |
1357 | ||
1358 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
1359 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
1360 | ||
1361 | while (clusters) { | |
49cb8d2d MF |
1362 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
1363 | &extent_flags); | |
9517bac6 MF |
1364 | if (ret < 0) { |
1365 | mlog_errno(ret); | |
1366 | goto out; | |
1367 | } | |
1368 | ||
49cb8d2d | 1369 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
9517bac6 MF |
1370 | ret = 1; |
1371 | break; | |
1372 | } | |
1373 | ||
1374 | if (extent_len > clusters) | |
1375 | extent_len = clusters; | |
1376 | ||
1377 | clusters -= extent_len; | |
1378 | cpos += extent_len; | |
1379 | } | |
1380 | out: | |
1381 | return ret; | |
1382 | } | |
1383 | ||
b2580103 MF |
1384 | static int ocfs2_write_remove_suid(struct inode *inode) |
1385 | { | |
1386 | int ret; | |
1387 | struct buffer_head *bh = NULL; | |
b2580103 | 1388 | |
b657c95c | 1389 | ret = ocfs2_read_inode_block(inode, &bh); |
b2580103 MF |
1390 | if (ret < 0) { |
1391 | mlog_errno(ret); | |
1392 | goto out; | |
1393 | } | |
1394 | ||
1395 | ret = __ocfs2_write_remove_suid(inode, bh); | |
1396 | out: | |
1397 | brelse(bh); | |
1398 | return ret; | |
1399 | } | |
1400 | ||
2ae99a60 MF |
1401 | /* |
1402 | * Allocate enough extents to cover the region starting at byte offset | |
1403 | * start for len bytes. Existing extents are skipped, any extents | |
1404 | * added are marked as "unwritten". | |
1405 | */ | |
1406 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, | |
1407 | u64 start, u64 len) | |
1408 | { | |
1409 | int ret; | |
1410 | u32 cpos, phys_cpos, clusters, alloc_size; | |
1afc32b9 MF |
1411 | u64 end = start + len; |
1412 | struct buffer_head *di_bh = NULL; | |
1413 | ||
1414 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
b657c95c | 1415 | ret = ocfs2_read_inode_block(inode, &di_bh); |
1afc32b9 MF |
1416 | if (ret) { |
1417 | mlog_errno(ret); | |
1418 | goto out; | |
1419 | } | |
1420 | ||
1421 | /* | |
1422 | * Nothing to do if the requested reservation range | |
1423 | * fits within the inode. | |
1424 | */ | |
1425 | if (ocfs2_size_fits_inline_data(di_bh, end)) | |
1426 | goto out; | |
1427 | ||
1428 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1429 | if (ret) { | |
1430 | mlog_errno(ret); | |
1431 | goto out; | |
1432 | } | |
1433 | } | |
2ae99a60 MF |
1434 | |
1435 | /* | |
1436 | * We consider both start and len to be inclusive. | |
1437 | */ | |
1438 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1439 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); | |
1440 | clusters -= cpos; | |
1441 | ||
1442 | while (clusters) { | |
1443 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1444 | &alloc_size, NULL); | |
1445 | if (ret) { | |
1446 | mlog_errno(ret); | |
1447 | goto out; | |
1448 | } | |
1449 | ||
1450 | /* | |
1451 | * Hole or existing extent len can be arbitrary, so | |
1452 | * cap it to our own allocation request. | |
1453 | */ | |
1454 | if (alloc_size > clusters) | |
1455 | alloc_size = clusters; | |
1456 | ||
1457 | if (phys_cpos) { | |
1458 | /* | |
1459 | * We already have an allocation at this | |
1460 | * region so we can safely skip it. | |
1461 | */ | |
1462 | goto next; | |
1463 | } | |
1464 | ||
1465 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); | |
1466 | if (ret) { | |
1467 | if (ret != -ENOSPC) | |
1468 | mlog_errno(ret); | |
1469 | goto out; | |
1470 | } | |
1471 | ||
1472 | next: | |
1473 | cpos += alloc_size; | |
1474 | clusters -= alloc_size; | |
1475 | } | |
1476 | ||
1477 | ret = 0; | |
1478 | out: | |
1afc32b9 MF |
1479 | |
1480 | brelse(di_bh); | |
2ae99a60 MF |
1481 | return ret; |
1482 | } | |
1483 | ||
063c4561 MF |
1484 | /* |
1485 | * Truncate a byte range, avoiding pages within partial clusters. This | |
1486 | * preserves those pages for the zeroing code to write to. | |
1487 | */ | |
1488 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, | |
1489 | u64 byte_len) | |
1490 | { | |
1491 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1492 | loff_t start, end; | |
1493 | struct address_space *mapping = inode->i_mapping; | |
1494 | ||
1495 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); | |
1496 | end = byte_start + byte_len; | |
1497 | end = end & ~(osb->s_clustersize - 1); | |
1498 | ||
1499 | if (start < end) { | |
1500 | unmap_mapping_range(mapping, start, end - start, 0); | |
1501 | truncate_inode_pages_range(mapping, start, end - 1); | |
1502 | } | |
1503 | } | |
1504 | ||
1505 | static int ocfs2_zero_partial_clusters(struct inode *inode, | |
1506 | u64 start, u64 len) | |
1507 | { | |
1508 | int ret = 0; | |
1509 | u64 tmpend, end = start + len; | |
1510 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1511 | unsigned int csize = osb->s_clustersize; | |
1512 | handle_t *handle; | |
1513 | ||
1514 | /* | |
1515 | * The "start" and "end" values are NOT necessarily part of | |
1516 | * the range whose allocation is being deleted. Rather, this | |
1517 | * is what the user passed in with the request. We must zero | |
1518 | * partial clusters here. There's no need to worry about | |
1519 | * physical allocation - the zeroing code knows to skip holes. | |
1520 | */ | |
468eedde TM |
1521 | trace_ocfs2_zero_partial_clusters( |
1522 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1523 | (unsigned long long)start, (unsigned long long)end); | |
063c4561 MF |
1524 | |
1525 | /* | |
1526 | * If both edges are on a cluster boundary then there's no | |
1527 | * zeroing required as the region is part of the allocation to | |
1528 | * be truncated. | |
1529 | */ | |
1530 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) | |
1531 | goto out; | |
1532 | ||
1533 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
1534 | if (IS_ERR(handle)) { |
1535 | ret = PTR_ERR(handle); | |
063c4561 MF |
1536 | mlog_errno(ret); |
1537 | goto out; | |
1538 | } | |
1539 | ||
1540 | /* | |
1541 | * We want to get the byte offset of the end of the 1st cluster. | |
1542 | */ | |
1543 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); | |
1544 | if (tmpend > end) | |
1545 | tmpend = end; | |
1546 | ||
468eedde TM |
1547 | trace_ocfs2_zero_partial_clusters_range1((unsigned long long)start, |
1548 | (unsigned long long)tmpend); | |
063c4561 MF |
1549 | |
1550 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); | |
1551 | if (ret) | |
1552 | mlog_errno(ret); | |
1553 | ||
1554 | if (tmpend < end) { | |
1555 | /* | |
1556 | * This may make start and end equal, but the zeroing | |
1557 | * code will skip any work in that case so there's no | |
1558 | * need to catch it up here. | |
1559 | */ | |
1560 | start = end & ~(osb->s_clustersize - 1); | |
1561 | ||
468eedde TM |
1562 | trace_ocfs2_zero_partial_clusters_range2( |
1563 | (unsigned long long)start, (unsigned long long)end); | |
063c4561 MF |
1564 | |
1565 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); | |
1566 | if (ret) | |
1567 | mlog_errno(ret); | |
1568 | } | |
1569 | ||
1570 | ocfs2_commit_trans(osb, handle); | |
1571 | out: | |
1572 | return ret; | |
1573 | } | |
1574 | ||
c1631d4a TY |
1575 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
1576 | { | |
1577 | int i; | |
1578 | struct ocfs2_extent_rec *rec = NULL; | |
1579 | ||
1580 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
1581 | ||
1582 | rec = &el->l_recs[i]; | |
1583 | ||
1584 | if (le32_to_cpu(rec->e_cpos) < pos) | |
1585 | break; | |
1586 | } | |
1587 | ||
1588 | return i; | |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * Helper to calculate the punching pos and length in one run, we handle the | |
1593 | * following three cases in order: | |
1594 | * | |
1595 | * - remove the entire record | |
1596 | * - remove a partial record | |
1597 | * - no record needs to be removed (hole-punching completed) | |
1598 | */ | |
1599 | static void ocfs2_calc_trunc_pos(struct inode *inode, | |
1600 | struct ocfs2_extent_list *el, | |
1601 | struct ocfs2_extent_rec *rec, | |
1602 | u32 trunc_start, u32 *trunc_cpos, | |
1603 | u32 *trunc_len, u32 *trunc_end, | |
1604 | u64 *blkno, int *done) | |
1605 | { | |
1606 | int ret = 0; | |
1607 | u32 coff, range; | |
1608 | ||
1609 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); | |
1610 | ||
1611 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { | |
9a790ba1 TY |
1612 | /* |
1613 | * remove an entire extent record. | |
1614 | */ | |
c1631d4a TY |
1615 | *trunc_cpos = le32_to_cpu(rec->e_cpos); |
1616 | /* | |
1617 | * Skip holes if any. | |
1618 | */ | |
1619 | if (range < *trunc_end) | |
1620 | *trunc_end = range; | |
1621 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); | |
1622 | *blkno = le64_to_cpu(rec->e_blkno); | |
1623 | *trunc_end = le32_to_cpu(rec->e_cpos); | |
1624 | } else if (range > trunc_start) { | |
9a790ba1 TY |
1625 | /* |
1626 | * remove a partial extent record, which means we're | |
1627 | * removing the last extent record. | |
1628 | */ | |
c1631d4a | 1629 | *trunc_cpos = trunc_start; |
9a790ba1 TY |
1630 | /* |
1631 | * skip hole if any. | |
1632 | */ | |
1633 | if (range < *trunc_end) | |
1634 | *trunc_end = range; | |
c1631d4a TY |
1635 | *trunc_len = *trunc_end - trunc_start; |
1636 | coff = trunc_start - le32_to_cpu(rec->e_cpos); | |
1637 | *blkno = le64_to_cpu(rec->e_blkno) + | |
1638 | ocfs2_clusters_to_blocks(inode->i_sb, coff); | |
1639 | *trunc_end = trunc_start; | |
1640 | } else { | |
1641 | /* | |
1642 | * It may have two following possibilities: | |
1643 | * | |
1644 | * - last record has been removed | |
1645 | * - trunc_start was within a hole | |
1646 | * | |
1647 | * both two cases mean the completion of hole punching. | |
1648 | */ | |
1649 | ret = 1; | |
1650 | } | |
1651 | ||
1652 | *done = ret; | |
1653 | } | |
1654 | ||
063c4561 MF |
1655 | static int ocfs2_remove_inode_range(struct inode *inode, |
1656 | struct buffer_head *di_bh, u64 byte_start, | |
1657 | u64 byte_len) | |
1658 | { | |
c1631d4a TY |
1659 | int ret = 0, flags = 0, done = 0, i; |
1660 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; | |
1661 | u32 cluster_in_el; | |
063c4561 MF |
1662 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1663 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
b1967d0e | 1664 | struct address_space *mapping = inode->i_mapping; |
fecc0112 | 1665 | struct ocfs2_extent_tree et; |
c1631d4a TY |
1666 | struct ocfs2_path *path = NULL; |
1667 | struct ocfs2_extent_list *el = NULL; | |
1668 | struct ocfs2_extent_rec *rec = NULL; | |
e8aec068 | 1669 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
c1631d4a | 1670 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
063c4561 | 1671 | |
5e404e9e | 1672 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
063c4561 MF |
1673 | ocfs2_init_dealloc_ctxt(&dealloc); |
1674 | ||
468eedde TM |
1675 | trace_ocfs2_remove_inode_range( |
1676 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1677 | (unsigned long long)byte_start, | |
1678 | (unsigned long long)byte_len); | |
1679 | ||
063c4561 MF |
1680 | if (byte_len == 0) |
1681 | return 0; | |
1682 | ||
1afc32b9 MF |
1683 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
1684 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, | |
b1967d0e MF |
1685 | byte_start + byte_len, 0); |
1686 | if (ret) { | |
1afc32b9 | 1687 | mlog_errno(ret); |
b1967d0e MF |
1688 | goto out; |
1689 | } | |
1690 | /* | |
1691 | * There's no need to get fancy with the page cache | |
1692 | * truncate of an inline-data inode. We're talking | |
1693 | * about less than a page here, which will be cached | |
1694 | * in the dinode buffer anyway. | |
1695 | */ | |
1696 | unmap_mapping_range(mapping, 0, 0, 0); | |
1697 | truncate_inode_pages(mapping, 0); | |
1698 | goto out; | |
1afc32b9 MF |
1699 | } |
1700 | ||
e8aec068 TY |
1701 | /* |
1702 | * For reflinks, we may need to CoW 2 clusters which might be | |
1703 | * partially zero'd later, if hole's start and end offset were | |
1704 | * within one cluster(means is not exactly aligned to clustersize). | |
1705 | */ | |
1706 | ||
1707 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { | |
1708 | ||
1709 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start); | |
1710 | if (ret) { | |
1711 | mlog_errno(ret); | |
1712 | goto out; | |
1713 | } | |
1714 | ||
1715 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len); | |
1716 | if (ret) { | |
1717 | mlog_errno(ret); | |
1718 | goto out; | |
1719 | } | |
1720 | } | |
1721 | ||
063c4561 | 1722 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
c1631d4a TY |
1723 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
1724 | cluster_in_el = trunc_end; | |
063c4561 | 1725 | |
063c4561 MF |
1726 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); |
1727 | if (ret) { | |
1728 | mlog_errno(ret); | |
1729 | goto out; | |
1730 | } | |
1731 | ||
c1631d4a TY |
1732 | path = ocfs2_new_path_from_et(&et); |
1733 | if (!path) { | |
1734 | ret = -ENOMEM; | |
1735 | mlog_errno(ret); | |
1736 | goto out; | |
1737 | } | |
1738 | ||
1739 | while (trunc_end > trunc_start) { | |
1740 | ||
1741 | ret = ocfs2_find_path(INODE_CACHE(inode), path, | |
1742 | cluster_in_el); | |
063c4561 MF |
1743 | if (ret) { |
1744 | mlog_errno(ret); | |
1745 | goto out; | |
1746 | } | |
1747 | ||
c1631d4a | 1748 | el = path_leaf_el(path); |
063c4561 | 1749 | |
c1631d4a TY |
1750 | i = ocfs2_find_rec(el, trunc_end); |
1751 | /* | |
1752 | * Need to go to previous extent block. | |
1753 | */ | |
1754 | if (i < 0) { | |
1755 | if (path->p_tree_depth == 0) | |
1756 | break; | |
063c4561 | 1757 | |
c1631d4a TY |
1758 | ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, |
1759 | path, | |
1760 | &cluster_in_el); | |
063c4561 MF |
1761 | if (ret) { |
1762 | mlog_errno(ret); | |
1763 | goto out; | |
1764 | } | |
c1631d4a TY |
1765 | |
1766 | /* | |
1767 | * We've reached the leftmost extent block, | |
1768 | * it's safe to leave. | |
1769 | */ | |
1770 | if (cluster_in_el == 0) | |
1771 | break; | |
1772 | ||
1773 | /* | |
1774 | * The 'pos' searched for previous extent block is | |
1775 | * always one cluster less than actual trunc_end. | |
1776 | */ | |
1777 | trunc_end = cluster_in_el + 1; | |
1778 | ||
1779 | ocfs2_reinit_path(path, 1); | |
1780 | ||
1781 | continue; | |
1782 | ||
1783 | } else | |
1784 | rec = &el->l_recs[i]; | |
1785 | ||
1786 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos, | |
1787 | &trunc_len, &trunc_end, &blkno, &done); | |
1788 | if (done) | |
1789 | break; | |
1790 | ||
1791 | flags = rec->e_flags; | |
1792 | phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno); | |
1793 | ||
1794 | ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos, | |
1795 | phys_cpos, trunc_len, flags, | |
1796 | &dealloc, refcount_loc); | |
1797 | if (ret < 0) { | |
1798 | mlog_errno(ret); | |
1799 | goto out; | |
063c4561 MF |
1800 | } |
1801 | ||
c1631d4a TY |
1802 | cluster_in_el = trunc_end; |
1803 | ||
1804 | ocfs2_reinit_path(path, 1); | |
063c4561 MF |
1805 | } |
1806 | ||
1807 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); | |
1808 | ||
1809 | out: | |
1810 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
1811 | ocfs2_run_deallocs(osb, &dealloc); | |
1812 | ||
1813 | return ret; | |
1814 | } | |
1815 | ||
b2580103 MF |
1816 | /* |
1817 | * Parts of this function taken from xfs_change_file_space() | |
1818 | */ | |
385820a3 MF |
1819 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
1820 | loff_t f_pos, unsigned int cmd, | |
1821 | struct ocfs2_space_resv *sr, | |
1822 | int change_size) | |
b2580103 MF |
1823 | { |
1824 | int ret; | |
1825 | s64 llen; | |
385820a3 | 1826 | loff_t size; |
b2580103 MF |
1827 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1828 | struct buffer_head *di_bh = NULL; | |
1829 | handle_t *handle; | |
a00cce35 | 1830 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
b2580103 | 1831 | |
b2580103 MF |
1832 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
1833 | return -EROFS; | |
1834 | ||
1835 | mutex_lock(&inode->i_mutex); | |
1836 | ||
1837 | /* | |
1838 | * This prevents concurrent writes on other nodes | |
1839 | */ | |
1840 | ret = ocfs2_rw_lock(inode, 1); | |
1841 | if (ret) { | |
1842 | mlog_errno(ret); | |
1843 | goto out; | |
1844 | } | |
1845 | ||
e63aecb6 | 1846 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
b2580103 MF |
1847 | if (ret) { |
1848 | mlog_errno(ret); | |
1849 | goto out_rw_unlock; | |
1850 | } | |
1851 | ||
1852 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { | |
1853 | ret = -EPERM; | |
e63aecb6 | 1854 | goto out_inode_unlock; |
b2580103 MF |
1855 | } |
1856 | ||
1857 | switch (sr->l_whence) { | |
1858 | case 0: /*SEEK_SET*/ | |
1859 | break; | |
1860 | case 1: /*SEEK_CUR*/ | |
385820a3 | 1861 | sr->l_start += f_pos; |
b2580103 MF |
1862 | break; |
1863 | case 2: /*SEEK_END*/ | |
1864 | sr->l_start += i_size_read(inode); | |
1865 | break; | |
1866 | default: | |
1867 | ret = -EINVAL; | |
e63aecb6 | 1868 | goto out_inode_unlock; |
b2580103 MF |
1869 | } |
1870 | sr->l_whence = 0; | |
1871 | ||
1872 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; | |
1873 | ||
1874 | if (sr->l_start < 0 | |
1875 | || sr->l_start > max_off | |
1876 | || (sr->l_start + llen) < 0 | |
1877 | || (sr->l_start + llen) > max_off) { | |
1878 | ret = -EINVAL; | |
e63aecb6 | 1879 | goto out_inode_unlock; |
b2580103 | 1880 | } |
385820a3 | 1881 | size = sr->l_start + sr->l_len; |
b2580103 MF |
1882 | |
1883 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { | |
1884 | if (sr->l_len <= 0) { | |
1885 | ret = -EINVAL; | |
e63aecb6 | 1886 | goto out_inode_unlock; |
b2580103 MF |
1887 | } |
1888 | } | |
1889 | ||
385820a3 | 1890 | if (file && should_remove_suid(file->f_path.dentry)) { |
b2580103 MF |
1891 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
1892 | if (ret) { | |
1893 | mlog_errno(ret); | |
e63aecb6 | 1894 | goto out_inode_unlock; |
b2580103 MF |
1895 | } |
1896 | } | |
1897 | ||
1898 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1899 | switch (cmd) { | |
1900 | case OCFS2_IOC_RESVSP: | |
1901 | case OCFS2_IOC_RESVSP64: | |
1902 | /* | |
1903 | * This takes unsigned offsets, but the signed ones we | |
1904 | * pass have been checked against overflow above. | |
1905 | */ | |
1906 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, | |
1907 | sr->l_len); | |
1908 | break; | |
1909 | case OCFS2_IOC_UNRESVSP: | |
1910 | case OCFS2_IOC_UNRESVSP64: | |
1911 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, | |
1912 | sr->l_len); | |
1913 | break; | |
1914 | default: | |
1915 | ret = -EINVAL; | |
1916 | } | |
1917 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1918 | if (ret) { | |
1919 | mlog_errno(ret); | |
e63aecb6 | 1920 | goto out_inode_unlock; |
b2580103 MF |
1921 | } |
1922 | ||
1923 | /* | |
1924 | * We update c/mtime for these changes | |
1925 | */ | |
1926 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1927 | if (IS_ERR(handle)) { | |
1928 | ret = PTR_ERR(handle); | |
1929 | mlog_errno(ret); | |
e63aecb6 | 1930 | goto out_inode_unlock; |
b2580103 MF |
1931 | } |
1932 | ||
385820a3 MF |
1933 | if (change_size && i_size_read(inode) < size) |
1934 | i_size_write(inode, size); | |
1935 | ||
b2580103 MF |
1936 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
1937 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); | |
1938 | if (ret < 0) | |
1939 | mlog_errno(ret); | |
1940 | ||
1941 | ocfs2_commit_trans(osb, handle); | |
1942 | ||
e63aecb6 | 1943 | out_inode_unlock: |
b2580103 | 1944 | brelse(di_bh); |
e63aecb6 | 1945 | ocfs2_inode_unlock(inode, 1); |
b2580103 MF |
1946 | out_rw_unlock: |
1947 | ocfs2_rw_unlock(inode, 1); | |
1948 | ||
b2580103 | 1949 | out: |
c259ae52 | 1950 | mutex_unlock(&inode->i_mutex); |
b2580103 MF |
1951 | return ret; |
1952 | } | |
1953 | ||
385820a3 MF |
1954 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
1955 | struct ocfs2_space_resv *sr) | |
1956 | { | |
1957 | struct inode *inode = file->f_path.dentry->d_inode; | |
c19a28e1 | 1958 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
385820a3 MF |
1959 | |
1960 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && | |
1961 | !ocfs2_writes_unwritten_extents(osb)) | |
1962 | return -ENOTTY; | |
1963 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && | |
1964 | !ocfs2_sparse_alloc(osb)) | |
1965 | return -ENOTTY; | |
1966 | ||
1967 | if (!S_ISREG(inode->i_mode)) | |
1968 | return -EINVAL; | |
1969 | ||
1970 | if (!(file->f_mode & FMODE_WRITE)) | |
1971 | return -EBADF; | |
1972 | ||
1973 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); | |
1974 | } | |
1975 | ||
2fe17c10 | 1976 | static long ocfs2_fallocate(struct file *file, int mode, loff_t offset, |
385820a3 MF |
1977 | loff_t len) |
1978 | { | |
2fe17c10 | 1979 | struct inode *inode = file->f_path.dentry->d_inode; |
385820a3 MF |
1980 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1981 | struct ocfs2_space_resv sr; | |
1982 | int change_size = 1; | |
db47fef2 | 1983 | int cmd = OCFS2_IOC_RESVSP64; |
385820a3 | 1984 | |
64c23e86 CH |
1985 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
1986 | return -EOPNOTSUPP; | |
385820a3 MF |
1987 | if (!ocfs2_writes_unwritten_extents(osb)) |
1988 | return -EOPNOTSUPP; | |
1989 | ||
385820a3 MF |
1990 | if (mode & FALLOC_FL_KEEP_SIZE) |
1991 | change_size = 0; | |
1992 | ||
db47fef2 JB |
1993 | if (mode & FALLOC_FL_PUNCH_HOLE) |
1994 | cmd = OCFS2_IOC_UNRESVSP64; | |
1995 | ||
385820a3 MF |
1996 | sr.l_whence = 0; |
1997 | sr.l_start = (s64)offset; | |
1998 | sr.l_len = (s64)len; | |
1999 | ||
db47fef2 JB |
2000 | return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr, |
2001 | change_size); | |
385820a3 MF |
2002 | } |
2003 | ||
293b2f70 TM |
2004 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
2005 | size_t count) | |
2006 | { | |
2007 | int ret = 0; | |
2008 | unsigned int extent_flags; | |
2009 | u32 cpos, clusters, extent_len, phys_cpos; | |
2010 | struct super_block *sb = inode->i_sb; | |
2011 | ||
2012 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || | |
2f48d593 TM |
2013 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
2014 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) | |
293b2f70 TM |
2015 | return 0; |
2016 | ||
2017 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
2018 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
2019 | ||
2020 | while (clusters) { | |
2021 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, | |
2022 | &extent_flags); | |
2023 | if (ret < 0) { | |
2024 | mlog_errno(ret); | |
2025 | goto out; | |
2026 | } | |
2027 | ||
2028 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { | |
2029 | ret = 1; | |
2030 | break; | |
2031 | } | |
2032 | ||
2033 | if (extent_len > clusters) | |
2034 | extent_len = clusters; | |
2035 | ||
2036 | clusters -= extent_len; | |
2037 | cpos += extent_len; | |
2038 | } | |
2039 | out: | |
2040 | return ret; | |
2041 | } | |
2042 | ||
2043 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, | |
b8908236 | 2044 | struct file *file, |
293b2f70 TM |
2045 | loff_t pos, size_t count, |
2046 | int *meta_level) | |
2047 | { | |
2048 | int ret; | |
2049 | struct buffer_head *di_bh = NULL; | |
2050 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
2051 | u32 clusters = | |
2052 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; | |
2053 | ||
2054 | ret = ocfs2_inode_lock(inode, &di_bh, 1); | |
2055 | if (ret) { | |
2056 | mlog_errno(ret); | |
2057 | goto out; | |
2058 | } | |
2059 | ||
2060 | *meta_level = 1; | |
2061 | ||
15502712 | 2062 | ret = ocfs2_refcount_cow(inode, file, di_bh, cpos, clusters, UINT_MAX); |
293b2f70 TM |
2063 | if (ret) |
2064 | mlog_errno(ret); | |
2065 | out: | |
2066 | brelse(di_bh); | |
2067 | return ret; | |
2068 | } | |
2069 | ||
b8908236 | 2070 | static int ocfs2_prepare_inode_for_write(struct file *file, |
8659ac25 TY |
2071 | loff_t *ppos, |
2072 | size_t count, | |
9517bac6 | 2073 | int appending, |
86470e98 TM |
2074 | int *direct_io, |
2075 | int *has_refcount) | |
ccd979bd | 2076 | { |
65ed39d6 | 2077 | int ret = 0, meta_level = 0; |
b8908236 | 2078 | struct dentry *dentry = file->f_path.dentry; |
8659ac25 | 2079 | struct inode *inode = dentry->d_inode; |
468eedde | 2080 | loff_t saved_pos = 0, end; |
ccd979bd | 2081 | |
2bd63216 | 2082 | /* |
65ed39d6 MF |
2083 | * We start with a read level meta lock and only jump to an ex |
2084 | * if we need to make modifications here. | |
ccd979bd | 2085 | */ |
ccd979bd | 2086 | for(;;) { |
e63aecb6 | 2087 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
ccd979bd MF |
2088 | if (ret < 0) { |
2089 | meta_level = -1; | |
2090 | mlog_errno(ret); | |
2091 | goto out; | |
2092 | } | |
2093 | ||
2094 | /* Clear suid / sgid if necessary. We do this here | |
2095 | * instead of later in the write path because | |
2096 | * remove_suid() calls ->setattr without any hint that | |
2097 | * we may have already done our cluster locking. Since | |
2098 | * ocfs2_setattr() *must* take cluster locks to | |
2099 | * proceeed, this will lead us to recursively lock the | |
2100 | * inode. There's also the dinode i_size state which | |
2101 | * can be lost via setattr during extending writes (we | |
2102 | * set inode->i_size at the end of a write. */ | |
8659ac25 | 2103 | if (should_remove_suid(dentry)) { |
ccd979bd | 2104 | if (meta_level == 0) { |
e63aecb6 | 2105 | ocfs2_inode_unlock(inode, meta_level); |
ccd979bd MF |
2106 | meta_level = 1; |
2107 | continue; | |
2108 | } | |
2109 | ||
2110 | ret = ocfs2_write_remove_suid(inode); | |
2111 | if (ret < 0) { | |
2112 | mlog_errno(ret); | |
8659ac25 | 2113 | goto out_unlock; |
ccd979bd MF |
2114 | } |
2115 | } | |
2116 | ||
2117 | /* work on a copy of ppos until we're sure that we won't have | |
2118 | * to recalculate it due to relocking. */ | |
468eedde | 2119 | if (appending) |
ccd979bd | 2120 | saved_pos = i_size_read(inode); |
468eedde | 2121 | else |
8659ac25 | 2122 | saved_pos = *ppos; |
3a0782d0 | 2123 | |
65ed39d6 | 2124 | end = saved_pos + count; |
9517bac6 | 2125 | |
293b2f70 TM |
2126 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
2127 | if (ret == 1) { | |
2128 | ocfs2_inode_unlock(inode, meta_level); | |
2129 | meta_level = -1; | |
2130 | ||
2131 | ret = ocfs2_prepare_inode_for_refcount(inode, | |
b8908236 | 2132 | file, |
293b2f70 TM |
2133 | saved_pos, |
2134 | count, | |
2135 | &meta_level); | |
86470e98 TM |
2136 | if (has_refcount) |
2137 | *has_refcount = 1; | |
96a1cc73 WW |
2138 | if (direct_io) |
2139 | *direct_io = 0; | |
293b2f70 TM |
2140 | } |
2141 | ||
2142 | if (ret < 0) { | |
2143 | mlog_errno(ret); | |
2144 | goto out_unlock; | |
2145 | } | |
2146 | ||
65ed39d6 MF |
2147 | /* |
2148 | * Skip the O_DIRECT checks if we don't need | |
2149 | * them. | |
2150 | */ | |
2151 | if (!direct_io || !(*direct_io)) | |
9517bac6 | 2152 | break; |
9517bac6 | 2153 | |
1afc32b9 MF |
2154 | /* |
2155 | * There's no sane way to do direct writes to an inode | |
2156 | * with inline data. | |
2157 | */ | |
2158 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2159 | *direct_io = 0; | |
2160 | break; | |
2161 | } | |
2162 | ||
3a0782d0 | 2163 | /* |
65ed39d6 MF |
2164 | * Allowing concurrent direct writes means |
2165 | * i_size changes wouldn't be synchronized, so | |
2166 | * one node could wind up truncating another | |
2167 | * nodes writes. | |
3a0782d0 | 2168 | */ |
65ed39d6 MF |
2169 | if (end > i_size_read(inode)) { |
2170 | *direct_io = 0; | |
ccd979bd | 2171 | break; |
ccd979bd MF |
2172 | } |
2173 | ||
65ed39d6 MF |
2174 | /* |
2175 | * We don't fill holes during direct io, so | |
2176 | * check for them here. If any are found, the | |
2177 | * caller will have to retake some cluster | |
2178 | * locks and initiate the io as buffered. | |
2179 | */ | |
2180 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); | |
2181 | if (ret == 1) { | |
2182 | *direct_io = 0; | |
2183 | ret = 0; | |
2184 | } else if (ret < 0) | |
2185 | mlog_errno(ret); | |
ccd979bd MF |
2186 | break; |
2187 | } | |
2188 | ||
8659ac25 TY |
2189 | if (appending) |
2190 | *ppos = saved_pos; | |
2191 | ||
2192 | out_unlock: | |
468eedde TM |
2193 | trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno, |
2194 | saved_pos, appending, count, | |
2195 | direct_io, has_refcount); | |
2196 | ||
293b2f70 TM |
2197 | if (meta_level >= 0) |
2198 | ocfs2_inode_unlock(inode, meta_level); | |
8659ac25 TY |
2199 | |
2200 | out: | |
2201 | return ret; | |
2202 | } | |
2203 | ||
2204 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, | |
2205 | const struct iovec *iov, | |
2206 | unsigned long nr_segs, | |
2207 | loff_t pos) | |
2208 | { | |
9517bac6 | 2209 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
86470e98 | 2210 | int can_do_direct, has_refcount = 0; |
9517bac6 MF |
2211 | ssize_t written = 0; |
2212 | size_t ocount; /* original count */ | |
2213 | size_t count; /* after file limit checks */ | |
9ea2d32f MF |
2214 | loff_t old_size, *ppos = &iocb->ki_pos; |
2215 | u32 old_clusters; | |
9517bac6 MF |
2216 | struct file *file = iocb->ki_filp; |
2217 | struct inode *inode = file->f_path.dentry->d_inode; | |
9ea2d32f | 2218 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
7bdb0d18 TY |
2219 | int full_coherency = !(osb->s_mount_opt & |
2220 | OCFS2_MOUNT_COHERENCY_BUFFERED); | |
9517bac6 | 2221 | |
468eedde TM |
2222 | trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry, |
2223 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
2224 | file->f_path.dentry->d_name.len, | |
2225 | file->f_path.dentry->d_name.name, | |
2226 | (unsigned int)nr_segs); | |
8659ac25 | 2227 | |
8659ac25 TY |
2228 | if (iocb->ki_left == 0) |
2229 | return 0; | |
2230 | ||
9517bac6 MF |
2231 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
2232 | ||
2233 | appending = file->f_flags & O_APPEND ? 1 : 0; | |
2234 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; | |
2235 | ||
8659ac25 | 2236 | mutex_lock(&inode->i_mutex); |
9517bac6 | 2237 | |
39c99f12 TY |
2238 | ocfs2_iocb_clear_sem_locked(iocb); |
2239 | ||
9517bac6 | 2240 | relock: |
bd5fe6c5 | 2241 | /* to match setattr's i_mutex -> rw_lock ordering */ |
9517bac6 | 2242 | if (direct_io) { |
9517bac6 | 2243 | have_alloc_sem = 1; |
39c99f12 TY |
2244 | /* communicate with ocfs2_dio_end_io */ |
2245 | ocfs2_iocb_set_sem_locked(iocb); | |
8659ac25 TY |
2246 | } |
2247 | ||
7bdb0d18 TY |
2248 | /* |
2249 | * Concurrent O_DIRECT writes are allowed with | |
2250 | * mount_option "coherency=buffered". | |
2251 | */ | |
2252 | rw_level = (!direct_io || full_coherency); | |
2253 | ||
8659ac25 TY |
2254 | ret = ocfs2_rw_lock(inode, rw_level); |
2255 | if (ret < 0) { | |
8659ac25 | 2256 | mlog_errno(ret); |
9517bac6 | 2257 | goto out_sems; |
8659ac25 TY |
2258 | } |
2259 | ||
7bdb0d18 TY |
2260 | /* |
2261 | * O_DIRECT writes with "coherency=full" need to take EX cluster | |
2262 | * inode_lock to guarantee coherency. | |
2263 | */ | |
2264 | if (direct_io && full_coherency) { | |
2265 | /* | |
2266 | * We need to take and drop the inode lock to force | |
2267 | * other nodes to drop their caches. Buffered I/O | |
2268 | * already does this in write_begin(). | |
2269 | */ | |
2270 | ret = ocfs2_inode_lock(inode, NULL, 1); | |
2271 | if (ret < 0) { | |
2272 | mlog_errno(ret); | |
2273 | goto out_sems; | |
2274 | } | |
2275 | ||
2276 | ocfs2_inode_unlock(inode, 1); | |
2277 | } | |
2278 | ||
9517bac6 | 2279 | can_do_direct = direct_io; |
b8908236 | 2280 | ret = ocfs2_prepare_inode_for_write(file, ppos, |
9517bac6 | 2281 | iocb->ki_left, appending, |
86470e98 | 2282 | &can_do_direct, &has_refcount); |
8659ac25 TY |
2283 | if (ret < 0) { |
2284 | mlog_errno(ret); | |
2285 | goto out; | |
2286 | } | |
ccd979bd | 2287 | |
9517bac6 MF |
2288 | /* |
2289 | * We can't complete the direct I/O as requested, fall back to | |
2290 | * buffered I/O. | |
2291 | */ | |
2292 | if (direct_io && !can_do_direct) { | |
2293 | ocfs2_rw_unlock(inode, rw_level); | |
9517bac6 MF |
2294 | |
2295 | have_alloc_sem = 0; | |
2296 | rw_level = -1; | |
2297 | ||
2298 | direct_io = 0; | |
9517bac6 MF |
2299 | goto relock; |
2300 | } | |
2301 | ||
9ea2d32f MF |
2302 | /* |
2303 | * To later detect whether a journal commit for sync writes is | |
2304 | * necessary, we sample i_size, and cluster count here. | |
2305 | */ | |
2306 | old_size = i_size_read(inode); | |
2307 | old_clusters = OCFS2_I(inode)->ip_clusters; | |
2308 | ||
ccd979bd | 2309 | /* communicate with ocfs2_dio_end_io */ |
7cdfc3a1 | 2310 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd | 2311 | |
6b933c8e LD |
2312 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
2313 | VERIFY_READ); | |
2314 | if (ret) | |
2315 | goto out_dio; | |
b6af1bcd | 2316 | |
6b933c8e LD |
2317 | count = ocount; |
2318 | ret = generic_write_checks(file, ppos, &count, | |
2319 | S_ISBLK(inode->i_mode)); | |
2320 | if (ret) | |
2321 | goto out_dio; | |
b6af1bcd | 2322 | |
6b933c8e | 2323 | if (direct_io) { |
9517bac6 MF |
2324 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
2325 | ppos, count, ocount); | |
2326 | if (written < 0) { | |
2327 | ret = written; | |
2328 | goto out_dio; | |
2329 | } | |
2330 | } else { | |
6b933c8e LD |
2331 | current->backing_dev_info = file->f_mapping->backing_dev_info; |
2332 | written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos, | |
2333 | ppos, count, 0); | |
2334 | current->backing_dev_info = NULL; | |
9517bac6 | 2335 | } |
ccd979bd | 2336 | |
9517bac6 | 2337 | out_dio: |
ccd979bd | 2338 | /* buffered aio wouldn't have proper lock coverage today */ |
9517bac6 | 2339 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
ccd979bd | 2340 | |
60c48674 | 2341 | if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) || |
81c8c82b | 2342 | ((file->f_flags & O_DIRECT) && !direct_io)) { |
918941a3 JK |
2343 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
2344 | pos + count - 1); | |
2345 | if (ret < 0) | |
2346 | written = ret; | |
2347 | ||
a03ab788 CL |
2348 | if (!ret && ((old_size != i_size_read(inode)) || |
2349 | (old_clusters != OCFS2_I(inode)->ip_clusters) || | |
2350 | has_refcount)) { | |
2b4e30fb | 2351 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
9ea2d32f MF |
2352 | if (ret < 0) |
2353 | written = ret; | |
2354 | } | |
918941a3 JK |
2355 | |
2356 | if (!ret) | |
2357 | ret = filemap_fdatawait_range(file->f_mapping, pos, | |
2358 | pos + count - 1); | |
9ea2d32f MF |
2359 | } |
2360 | ||
2bd63216 | 2361 | /* |
ccd979bd MF |
2362 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
2363 | * function pointer which is called when o_direct io completes so that | |
bd5fe6c5 | 2364 | * it can unlock our rw lock. |
ccd979bd MF |
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: | |
df2d6f26 | 2380 | if (have_alloc_sem) |
39c99f12 | 2381 | ocfs2_iocb_clear_sem_locked(iocb); |
9517bac6 | 2382 | |
1b1dcc1b | 2383 | mutex_unlock(&inode->i_mutex); |
ccd979bd | 2384 | |
812e7a6a WW |
2385 | if (written) |
2386 | ret = written; | |
812e7a6a | 2387 | return ret; |
ccd979bd MF |
2388 | } |
2389 | ||
328eaaba MS |
2390 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
2391 | struct file *out, | |
2392 | struct splice_desc *sd) | |
2393 | { | |
2394 | int ret; | |
2395 | ||
b8908236 | 2396 | ret = ocfs2_prepare_inode_for_write(out, &sd->pos, |
86470e98 | 2397 | sd->total_len, 0, NULL, NULL); |
328eaaba MS |
2398 | if (ret < 0) { |
2399 | mlog_errno(ret); | |
2400 | return ret; | |
2401 | } | |
2402 | ||
2403 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); | |
2404 | } | |
2405 | ||
8659ac25 TY |
2406 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
2407 | struct file *out, | |
2408 | loff_t *ppos, | |
2409 | size_t len, | |
2410 | unsigned int flags) | |
2411 | { | |
2412 | int ret; | |
328eaaba MS |
2413 | struct address_space *mapping = out->f_mapping; |
2414 | struct inode *inode = mapping->host; | |
2415 | struct splice_desc sd = { | |
2416 | .total_len = len, | |
2417 | .flags = flags, | |
2418 | .pos = *ppos, | |
2419 | .u.file = out, | |
2420 | }; | |
8659ac25 | 2421 | |
468eedde TM |
2422 | |
2423 | trace_ocfs2_file_splice_write(inode, out, out->f_path.dentry, | |
2424 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
2425 | out->f_path.dentry->d_name.len, | |
2426 | out->f_path.dentry->d_name.name, len); | |
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 | 2469 | |
8659ac25 TY |
2470 | return ret; |
2471 | } | |
2472 | ||
2473 | static ssize_t ocfs2_file_splice_read(struct file *in, | |
2474 | loff_t *ppos, | |
2475 | struct pipe_inode_info *pipe, | |
2476 | size_t len, | |
2477 | unsigned int flags) | |
2478 | { | |
1962f39a | 2479 | int ret = 0, lock_level = 0; |
d28c9174 | 2480 | struct inode *inode = in->f_path.dentry->d_inode; |
8659ac25 | 2481 | |
468eedde TM |
2482 | trace_ocfs2_file_splice_read(inode, in, in->f_path.dentry, |
2483 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
2484 | in->f_path.dentry->d_name.len, | |
2485 | in->f_path.dentry->d_name.name, len); | |
8659ac25 TY |
2486 | |
2487 | /* | |
2488 | * See the comment in ocfs2_file_aio_read() | |
2489 | */ | |
1962f39a | 2490 | ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level); |
8659ac25 TY |
2491 | if (ret < 0) { |
2492 | mlog_errno(ret); | |
2493 | goto bail; | |
2494 | } | |
1962f39a | 2495 | ocfs2_inode_unlock(inode, lock_level); |
8659ac25 TY |
2496 | |
2497 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); | |
2498 | ||
2499 | bail: | |
8659ac25 TY |
2500 | return ret; |
2501 | } | |
2502 | ||
ccd979bd | 2503 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
027445c3 BP |
2504 | const struct iovec *iov, |
2505 | unsigned long nr_segs, | |
ccd979bd MF |
2506 | loff_t pos) |
2507 | { | |
25899dee | 2508 | int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0; |
ccd979bd | 2509 | struct file *filp = iocb->ki_filp; |
d28c9174 | 2510 | struct inode *inode = filp->f_path.dentry->d_inode; |
ccd979bd | 2511 | |
468eedde TM |
2512 | trace_ocfs2_file_aio_read(inode, filp, filp->f_path.dentry, |
2513 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
2514 | filp->f_path.dentry->d_name.len, | |
2515 | filp->f_path.dentry->d_name.name, nr_segs); | |
2516 | ||
ccd979bd MF |
2517 | |
2518 | if (!inode) { | |
2519 | ret = -EINVAL; | |
2520 | mlog_errno(ret); | |
2521 | goto bail; | |
2522 | } | |
2523 | ||
39c99f12 TY |
2524 | ocfs2_iocb_clear_sem_locked(iocb); |
2525 | ||
2bd63216 | 2526 | /* |
ccd979bd MF |
2527 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
2528 | * need locks to protect pending reads from racing with truncate. | |
2529 | */ | |
2530 | if (filp->f_flags & O_DIRECT) { | |
ccd979bd | 2531 | have_alloc_sem = 1; |
39c99f12 | 2532 | ocfs2_iocb_set_sem_locked(iocb); |
ccd979bd MF |
2533 | |
2534 | ret = ocfs2_rw_lock(inode, 0); | |
2535 | if (ret < 0) { | |
2536 | mlog_errno(ret); | |
2537 | goto bail; | |
2538 | } | |
2539 | rw_level = 0; | |
2540 | /* communicate with ocfs2_dio_end_io */ | |
7cdfc3a1 | 2541 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd MF |
2542 | } |
2543 | ||
c4374f8a MF |
2544 | /* |
2545 | * We're fine letting folks race truncates and extending | |
2546 | * writes with read across the cluster, just like they can | |
2547 | * locally. Hence no rw_lock during read. | |
2bd63216 | 2548 | * |
c4374f8a MF |
2549 | * Take and drop the meta data lock to update inode fields |
2550 | * like i_size. This allows the checks down below | |
2bd63216 | 2551 | * generic_file_aio_read() a chance of actually working. |
c4374f8a | 2552 | */ |
e63aecb6 | 2553 | ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
c4374f8a MF |
2554 | if (ret < 0) { |
2555 | mlog_errno(ret); | |
2556 | goto bail; | |
2557 | } | |
e63aecb6 | 2558 | ocfs2_inode_unlock(inode, lock_level); |
c4374f8a | 2559 | |
027445c3 | 2560 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
468eedde | 2561 | trace_generic_file_aio_read_ret(ret); |
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: | |
df2d6f26 | 2573 | if (have_alloc_sem) |
39c99f12 | 2574 | ocfs2_iocb_clear_sem_locked(iocb); |
df2d6f26 | 2575 | |
2bd63216 | 2576 | if (rw_level != -1) |
ccd979bd | 2577 | ocfs2_rw_unlock(inode, rw_level); |
ccd979bd MF |
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, | |
00dc417f | 2590 | .fiemap = ocfs2_fiemap, |
178ea735 | 2591 | .check_acl = ocfs2_check_acl, |
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, |
178ea735 | 2598 | .check_acl = ocfs2_check_acl, |
ccd979bd MF |
2599 | }; |
2600 | ||
53da4939 MF |
2601 | /* |
2602 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with | |
2603 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! | |
2604 | */ | |
4b6f5d20 | 2605 | const struct file_operations ocfs2_fops = { |
32c3c0e2 | 2606 | .llseek = generic_file_llseek, |
ccd979bd MF |
2607 | .read = do_sync_read, |
2608 | .write = do_sync_write, | |
ccd979bd MF |
2609 | .mmap = ocfs2_mmap, |
2610 | .fsync = ocfs2_sync_file, | |
2611 | .release = ocfs2_file_release, | |
2612 | .open = ocfs2_file_open, | |
2613 | .aio_read = ocfs2_file_aio_read, | |
2614 | .aio_write = ocfs2_file_aio_write, | |
c9ec1488 | 2615 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2616 | #ifdef CONFIG_COMPAT |
2617 | .compat_ioctl = ocfs2_compat_ioctl, | |
2618 | #endif | |
53da4939 | 2619 | .lock = ocfs2_lock, |
53fc622b | 2620 | .flock = ocfs2_flock, |
8659ac25 TY |
2621 | .splice_read = ocfs2_file_splice_read, |
2622 | .splice_write = ocfs2_file_splice_write, | |
2fe17c10 | 2623 | .fallocate = ocfs2_fallocate, |
ccd979bd MF |
2624 | }; |
2625 | ||
4b6f5d20 | 2626 | const struct file_operations ocfs2_dops = { |
32c3c0e2 | 2627 | .llseek = generic_file_llseek, |
ccd979bd MF |
2628 | .read = generic_read_dir, |
2629 | .readdir = ocfs2_readdir, | |
2630 | .fsync = ocfs2_sync_file, | |
53fc622b MF |
2631 | .release = ocfs2_dir_release, |
2632 | .open = ocfs2_dir_open, | |
c9ec1488 | 2633 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2634 | #ifdef CONFIG_COMPAT |
2635 | .compat_ioctl = ocfs2_compat_ioctl, | |
53da4939 MF |
2636 | #endif |
2637 | .lock = ocfs2_lock, | |
2638 | .flock = ocfs2_flock, | |
2639 | }; | |
2640 | ||
2641 | /* | |
2642 | * POSIX-lockless variants of our file_operations. | |
2643 | * | |
2644 | * These will be used if the underlying cluster stack does not support | |
2645 | * posix file locking, if the user passes the "localflocks" mount | |
2646 | * option, or if we have a local-only fs. | |
2647 | * | |
2648 | * ocfs2_flock is in here because all stacks handle UNIX file locks, | |
2649 | * so we still want it in the case of no stack support for | |
2650 | * plocks. Internally, it will do the right thing when asked to ignore | |
2651 | * the cluster. | |
2652 | */ | |
2653 | const struct file_operations ocfs2_fops_no_plocks = { | |
2654 | .llseek = generic_file_llseek, | |
2655 | .read = do_sync_read, | |
2656 | .write = do_sync_write, | |
2657 | .mmap = ocfs2_mmap, | |
2658 | .fsync = ocfs2_sync_file, | |
2659 | .release = ocfs2_file_release, | |
2660 | .open = ocfs2_file_open, | |
2661 | .aio_read = ocfs2_file_aio_read, | |
2662 | .aio_write = ocfs2_file_aio_write, | |
2663 | .unlocked_ioctl = ocfs2_ioctl, | |
2664 | #ifdef CONFIG_COMPAT | |
2665 | .compat_ioctl = ocfs2_compat_ioctl, | |
2666 | #endif | |
2667 | .flock = ocfs2_flock, | |
2668 | .splice_read = ocfs2_file_splice_read, | |
2669 | .splice_write = ocfs2_file_splice_write, | |
3d1c1829 | 2670 | .fallocate = ocfs2_fallocate, |
53da4939 MF |
2671 | }; |
2672 | ||
2673 | const struct file_operations ocfs2_dops_no_plocks = { | |
2674 | .llseek = generic_file_llseek, | |
2675 | .read = generic_read_dir, | |
2676 | .readdir = ocfs2_readdir, | |
2677 | .fsync = ocfs2_sync_file, | |
2678 | .release = ocfs2_dir_release, | |
2679 | .open = ocfs2_dir_open, | |
2680 | .unlocked_ioctl = ocfs2_ioctl, | |
2681 | #ifdef CONFIG_COMPAT | |
2682 | .compat_ioctl = ocfs2_compat_ioctl, | |
586d232b | 2683 | #endif |
53fc622b | 2684 | .flock = ocfs2_flock, |
ccd979bd | 2685 | }; |