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ccd979bd MF |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * file.c | |
5 | * | |
6 | * File open, close, extend, truncate | |
7 | * | |
8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public | |
21 | * License along with this program; if not, write to the | |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | * Boston, MA 021110-1307, USA. | |
24 | */ | |
25 | ||
16f7e0fe | 26 | #include <linux/capability.h> |
ccd979bd MF |
27 | #include <linux/fs.h> |
28 | #include <linux/types.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/highmem.h> | |
31 | #include <linux/pagemap.h> | |
32 | #include <linux/uio.h> | |
e2057c5a | 33 | #include <linux/sched.h> |
d6b29d7c | 34 | #include <linux/splice.h> |
7f1a37e3 | 35 | #include <linux/mount.h> |
9517bac6 | 36 | #include <linux/writeback.h> |
385820a3 | 37 | #include <linux/falloc.h> |
a90714c1 | 38 | #include <linux/quotaops.h> |
04eda1a1 | 39 | #include <linux/blkdev.h> |
ccd979bd MF |
40 | |
41 | #define MLOG_MASK_PREFIX ML_INODE | |
42 | #include <cluster/masklog.h> | |
43 | ||
44 | #include "ocfs2.h" | |
45 | ||
46 | #include "alloc.h" | |
47 | #include "aops.h" | |
48 | #include "dir.h" | |
49 | #include "dlmglue.h" | |
50 | #include "extent_map.h" | |
51 | #include "file.h" | |
52 | #include "sysfile.h" | |
53 | #include "inode.h" | |
ca4d147e | 54 | #include "ioctl.h" |
ccd979bd | 55 | #include "journal.h" |
53fc622b | 56 | #include "locks.h" |
ccd979bd MF |
57 | #include "mmap.h" |
58 | #include "suballoc.h" | |
59 | #include "super.h" | |
cf1d6c76 | 60 | #include "xattr.h" |
23fc2702 | 61 | #include "acl.h" |
a90714c1 | 62 | #include "quota.h" |
293b2f70 | 63 | #include "refcounttree.h" |
ccd979bd MF |
64 | |
65 | #include "buffer_head_io.h" | |
66 | ||
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 | ||
ef6b689b TM |
102 | mlog(0, "(0x%p, 0x%p, '%.*s')\n", inode, file, |
103 | file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name); | |
ccd979bd | 104 | |
907f4554 | 105 | if (file->f_mode & FMODE_WRITE) |
871a2931 | 106 | dquot_initialize(inode); |
907f4554 | 107 | |
ccd979bd MF |
108 | spin_lock(&oi->ip_lock); |
109 | ||
110 | /* Check that the inode hasn't been wiped from disk by another | |
111 | * node. If it hasn't then we're safe as long as we hold the | |
112 | * spin lock until our increment of open count. */ | |
113 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { | |
114 | spin_unlock(&oi->ip_lock); | |
115 | ||
116 | status = -ENOENT; | |
117 | goto leave; | |
118 | } | |
119 | ||
120 | if (mode & O_DIRECT) | |
121 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; | |
122 | ||
123 | oi->ip_open_count++; | |
124 | spin_unlock(&oi->ip_lock); | |
53fc622b MF |
125 | |
126 | status = ocfs2_init_file_private(inode, file); | |
127 | if (status) { | |
128 | /* | |
129 | * We want to set open count back if we're failing the | |
130 | * open. | |
131 | */ | |
132 | spin_lock(&oi->ip_lock); | |
133 | oi->ip_open_count--; | |
134 | spin_unlock(&oi->ip_lock); | |
135 | } | |
136 | ||
ccd979bd | 137 | leave: |
ccd979bd MF |
138 | return status; |
139 | } | |
140 | ||
141 | static int ocfs2_file_release(struct inode *inode, struct file *file) | |
142 | { | |
143 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
144 | ||
ef6b689b TM |
145 | mlog(0, "(0x%p, 0x%p, '%.*s')\n", inode, file, |
146 | file->f_path.dentry->d_name.len, | |
147 | file->f_path.dentry->d_name.name); | |
ccd979bd MF |
148 | |
149 | spin_lock(&oi->ip_lock); | |
150 | if (!--oi->ip_open_count) | |
151 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; | |
152 | spin_unlock(&oi->ip_lock); | |
153 | ||
53fc622b MF |
154 | ocfs2_free_file_private(inode, file); |
155 | ||
ccd979bd MF |
156 | return 0; |
157 | } | |
158 | ||
53fc622b MF |
159 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
160 | { | |
161 | return ocfs2_init_file_private(inode, file); | |
162 | } | |
163 | ||
164 | static int ocfs2_dir_release(struct inode *inode, struct file *file) | |
165 | { | |
166 | ocfs2_free_file_private(inode, file); | |
167 | return 0; | |
168 | } | |
169 | ||
7ea80859 | 170 | static int ocfs2_sync_file(struct file *file, int datasync) |
ccd979bd MF |
171 | { |
172 | int err = 0; | |
173 | journal_t *journal; | |
7ea80859 | 174 | struct inode *inode = file->f_mapping->host; |
ccd979bd MF |
175 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
176 | ||
ef6b689b TM |
177 | mlog(0, "(0x%p, %d, 0x%p, '%.*s')\n", file, datasync, |
178 | file->f_path.dentry, file->f_path.dentry->d_name.len, | |
179 | file->f_path.dentry->d_name.name); | |
ccd979bd | 180 | |
04eda1a1 JK |
181 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) { |
182 | /* | |
183 | * We still have to flush drive's caches to get data to the | |
184 | * platter | |
185 | */ | |
186 | if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) | |
f8cae0f0 | 187 | blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
e04cc15f | 188 | goto bail; |
04eda1a1 | 189 | } |
e04cc15f | 190 | |
ccd979bd | 191 | journal = osb->journal->j_journal; |
2b4e30fb | 192 | err = jbd2_journal_force_commit(journal); |
ccd979bd MF |
193 | |
194 | bail: | |
c1e8d35e TM |
195 | if (err) |
196 | mlog_errno(err); | |
ccd979bd MF |
197 | |
198 | return (err < 0) ? -EIO : 0; | |
199 | } | |
200 | ||
7f1a37e3 TY |
201 | int ocfs2_should_update_atime(struct inode *inode, |
202 | struct vfsmount *vfsmnt) | |
203 | { | |
204 | struct timespec now; | |
205 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
206 | ||
207 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
208 | return 0; | |
209 | ||
210 | if ((inode->i_flags & S_NOATIME) || | |
211 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
212 | return 0; | |
213 | ||
6c2aad05 MF |
214 | /* |
215 | * We can be called with no vfsmnt structure - NFSD will | |
216 | * sometimes do this. | |
217 | * | |
218 | * Note that our action here is different than touch_atime() - | |
219 | * if we can't tell whether this is a noatime mount, then we | |
220 | * don't know whether to trust the value of s_atime_quantum. | |
221 | */ | |
222 | if (vfsmnt == NULL) | |
223 | return 0; | |
224 | ||
7f1a37e3 TY |
225 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
226 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
227 | return 0; | |
228 | ||
7e913c53 MF |
229 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
230 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || | |
231 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) | |
232 | return 1; | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
7f1a37e3 TY |
237 | now = CURRENT_TIME; |
238 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) | |
239 | return 0; | |
240 | else | |
241 | return 1; | |
242 | } | |
243 | ||
244 | int ocfs2_update_inode_atime(struct inode *inode, | |
245 | struct buffer_head *bh) | |
246 | { | |
247 | int ret; | |
248 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
249 | handle_t *handle; | |
c11e9faf | 250 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
7f1a37e3 | 251 | |
7f1a37e3 | 252 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
253 | if (IS_ERR(handle)) { |
254 | ret = PTR_ERR(handle); | |
7f1a37e3 TY |
255 | mlog_errno(ret); |
256 | goto out; | |
257 | } | |
258 | ||
0cf2f763 | 259 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 260 | OCFS2_JOURNAL_ACCESS_WRITE); |
c11e9faf MF |
261 | if (ret) { |
262 | mlog_errno(ret); | |
263 | goto out_commit; | |
264 | } | |
265 | ||
266 | /* | |
267 | * Don't use ocfs2_mark_inode_dirty() here as we don't always | |
268 | * have i_mutex to guard against concurrent changes to other | |
269 | * inode fields. | |
270 | */ | |
7f1a37e3 | 271 | inode->i_atime = CURRENT_TIME; |
c11e9faf MF |
272 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
273 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); | |
ec20cec7 | 274 | ocfs2_journal_dirty(handle, bh); |
7f1a37e3 | 275 | |
c11e9faf | 276 | out_commit: |
7f1a37e3 TY |
277 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
278 | out: | |
7f1a37e3 TY |
279 | return ret; |
280 | } | |
281 | ||
6cb129f5 AB |
282 | static int ocfs2_set_inode_size(handle_t *handle, |
283 | struct inode *inode, | |
284 | struct buffer_head *fe_bh, | |
285 | u64 new_i_size) | |
ccd979bd MF |
286 | { |
287 | int status; | |
288 | ||
ccd979bd | 289 | i_size_write(inode, new_i_size); |
8110b073 | 290 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
291 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
292 | ||
293 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
294 | if (status < 0) { | |
295 | mlog_errno(status); | |
296 | goto bail; | |
297 | } | |
298 | ||
299 | bail: | |
ccd979bd MF |
300 | return status; |
301 | } | |
302 | ||
9e33d69f JK |
303 | int ocfs2_simple_size_update(struct inode *inode, |
304 | struct buffer_head *di_bh, | |
305 | u64 new_i_size) | |
ccd979bd MF |
306 | { |
307 | int ret; | |
308 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 309 | handle_t *handle = NULL; |
ccd979bd | 310 | |
65eff9cc | 311 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
312 | if (IS_ERR(handle)) { |
313 | ret = PTR_ERR(handle); | |
ccd979bd MF |
314 | mlog_errno(ret); |
315 | goto out; | |
316 | } | |
317 | ||
318 | ret = ocfs2_set_inode_size(handle, inode, di_bh, | |
319 | new_i_size); | |
320 | if (ret < 0) | |
321 | mlog_errno(ret); | |
322 | ||
02dc1af4 | 323 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
324 | out: |
325 | return ret; | |
326 | } | |
327 | ||
37f8a2bf TM |
328 | static int ocfs2_cow_file_pos(struct inode *inode, |
329 | struct buffer_head *fe_bh, | |
330 | u64 offset) | |
331 | { | |
332 | int status; | |
333 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
334 | unsigned int num_clusters = 0; | |
335 | unsigned int ext_flags = 0; | |
336 | ||
337 | /* | |
338 | * If the new offset is aligned to the range of the cluster, there is | |
339 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to | |
340 | * CoW either. | |
341 | */ | |
342 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) | |
343 | return 0; | |
344 | ||
345 | status = ocfs2_get_clusters(inode, cpos, &phys, | |
346 | &num_clusters, &ext_flags); | |
347 | if (status) { | |
348 | mlog_errno(status); | |
349 | goto out; | |
350 | } | |
351 | ||
352 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
353 | goto out; | |
354 | ||
15502712 | 355 | return ocfs2_refcount_cow(inode, NULL, fe_bh, cpos, 1, cpos+1); |
37f8a2bf TM |
356 | |
357 | out: | |
358 | return status; | |
359 | } | |
360 | ||
ccd979bd MF |
361 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
362 | struct inode *inode, | |
363 | struct buffer_head *fe_bh, | |
364 | u64 new_i_size) | |
365 | { | |
366 | int status; | |
1fabe148 | 367 | handle_t *handle; |
60b11392 | 368 | struct ocfs2_dinode *di; |
35edec1d | 369 | u64 cluster_bytes; |
ccd979bd | 370 | |
37f8a2bf TM |
371 | /* |
372 | * We need to CoW the cluster contains the offset if it is reflinked | |
373 | * since we will call ocfs2_zero_range_for_truncate later which will | |
374 | * write "0" from offset to the end of the cluster. | |
375 | */ | |
376 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); | |
377 | if (status) { | |
378 | mlog_errno(status); | |
379 | return status; | |
380 | } | |
381 | ||
ccd979bd MF |
382 | /* TODO: This needs to actually orphan the inode in this |
383 | * transaction. */ | |
384 | ||
65eff9cc | 385 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ccd979bd MF |
386 | if (IS_ERR(handle)) { |
387 | status = PTR_ERR(handle); | |
388 | mlog_errno(status); | |
389 | goto out; | |
390 | } | |
391 | ||
0cf2f763 | 392 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
13723d00 | 393 | OCFS2_JOURNAL_ACCESS_WRITE); |
60b11392 MF |
394 | if (status < 0) { |
395 | mlog_errno(status); | |
396 | goto out_commit; | |
397 | } | |
398 | ||
399 | /* | |
400 | * Do this before setting i_size. | |
401 | */ | |
35edec1d MF |
402 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
403 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, | |
404 | cluster_bytes); | |
60b11392 MF |
405 | if (status) { |
406 | mlog_errno(status); | |
407 | goto out_commit; | |
408 | } | |
409 | ||
410 | i_size_write(inode, new_i_size); | |
60b11392 MF |
411 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
412 | ||
413 | di = (struct ocfs2_dinode *) fe_bh->b_data; | |
414 | di->i_size = cpu_to_le64(new_i_size); | |
415 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); | |
416 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
417 | ||
ec20cec7 | 418 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 419 | |
60b11392 | 420 | out_commit: |
02dc1af4 | 421 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 422 | out: |
ccd979bd MF |
423 | return status; |
424 | } | |
425 | ||
426 | static int ocfs2_truncate_file(struct inode *inode, | |
427 | struct buffer_head *di_bh, | |
428 | u64 new_i_size) | |
429 | { | |
430 | int status = 0; | |
431 | struct ocfs2_dinode *fe = NULL; | |
432 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
ccd979bd | 433 | |
ef6b689b TM |
434 | mlog(0, "(inode = %llu, new_i_size = %llu\n", |
435 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
436 | (unsigned long long)new_i_size); | |
ccd979bd | 437 | |
b657c95c JB |
438 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
439 | * already validated it */ | |
ccd979bd | 440 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
ccd979bd MF |
441 | |
442 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), | |
b0697053 MF |
443 | "Inode %llu, inode i_size = %lld != di " |
444 | "i_size = %llu, i_flags = 0x%x\n", | |
445 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ccd979bd | 446 | i_size_read(inode), |
b0697053 MF |
447 | (unsigned long long)le64_to_cpu(fe->i_size), |
448 | le32_to_cpu(fe->i_flags)); | |
ccd979bd MF |
449 | |
450 | if (new_i_size > le64_to_cpu(fe->i_size)) { | |
b0697053 MF |
451 | mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", |
452 | (unsigned long long)le64_to_cpu(fe->i_size), | |
453 | (unsigned long long)new_i_size); | |
ccd979bd MF |
454 | status = -EINVAL; |
455 | mlog_errno(status); | |
456 | goto bail; | |
457 | } | |
458 | ||
b0697053 MF |
459 | mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", |
460 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
461 | (unsigned long long)le64_to_cpu(fe->i_size), | |
462 | (unsigned long long)new_i_size); | |
ccd979bd MF |
463 | |
464 | /* lets handle the simple truncate cases before doing any more | |
465 | * cluster locking. */ | |
466 | if (new_i_size == le64_to_cpu(fe->i_size)) | |
467 | goto bail; | |
468 | ||
2e89b2e4 MF |
469 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
470 | ||
4fe370af MF |
471 | ocfs2_resv_discard(&osb->osb_la_resmap, |
472 | &OCFS2_I(inode)->ip_la_data_resv); | |
473 | ||
c934a92d MF |
474 | /* |
475 | * The inode lock forced other nodes to sync and drop their | |
476 | * pages, which (correctly) happens even if we have a truncate | |
477 | * without allocation change - ocfs2 cluster sizes can be much | |
478 | * greater than page size, so we have to truncate them | |
479 | * anyway. | |
480 | */ | |
2e89b2e4 MF |
481 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
482 | truncate_inode_pages(inode->i_mapping, new_i_size); | |
483 | ||
1afc32b9 MF |
484 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
485 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, | |
b1967d0e | 486 | i_size_read(inode), 1); |
1afc32b9 MF |
487 | if (status) |
488 | mlog_errno(status); | |
489 | ||
c934a92d | 490 | goto bail_unlock_sem; |
1afc32b9 MF |
491 | } |
492 | ||
ccd979bd MF |
493 | /* alright, we're going to need to do a full blown alloc size |
494 | * change. Orphan the inode so that recovery can complete the | |
495 | * truncate if necessary. This does the task of marking | |
496 | * i_size. */ | |
497 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); | |
498 | if (status < 0) { | |
499 | mlog_errno(status); | |
c934a92d | 500 | goto bail_unlock_sem; |
ccd979bd MF |
501 | } |
502 | ||
78f94673 | 503 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
ccd979bd MF |
504 | if (status < 0) { |
505 | mlog_errno(status); | |
c934a92d | 506 | goto bail_unlock_sem; |
ccd979bd MF |
507 | } |
508 | ||
509 | /* TODO: orphan dir cleanup here. */ | |
c934a92d | 510 | bail_unlock_sem: |
2e89b2e4 MF |
511 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
512 | ||
ccd979bd | 513 | bail: |
8b2c0dba TM |
514 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
515 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
ccd979bd | 516 | |
ccd979bd MF |
517 | return status; |
518 | } | |
519 | ||
520 | /* | |
0eb8d47e | 521 | * extend file allocation only here. |
ccd979bd MF |
522 | * we'll update all the disk stuff, and oip->alloc_size |
523 | * | |
524 | * expect stuff to be locked, a transaction started and enough data / | |
525 | * metadata reservations in the contexts. | |
526 | * | |
527 | * Will return -EAGAIN, and a reason if a restart is needed. | |
528 | * If passed in, *reason will always be set, even in error. | |
529 | */ | |
0eb8d47e TM |
530 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
531 | struct inode *inode, | |
532 | u32 *logical_offset, | |
533 | u32 clusters_to_add, | |
534 | int mark_unwritten, | |
535 | struct buffer_head *fe_bh, | |
536 | handle_t *handle, | |
537 | struct ocfs2_alloc_context *data_ac, | |
538 | struct ocfs2_alloc_context *meta_ac, | |
539 | enum ocfs2_alloc_restarted *reason_ret) | |
ccd979bd | 540 | { |
f99b9b7c JB |
541 | int ret; |
542 | struct ocfs2_extent_tree et; | |
ccd979bd | 543 | |
5e404e9e | 544 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
cbee7e1a JB |
545 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
546 | clusters_to_add, mark_unwritten, | |
547 | data_ac, meta_ac, reason_ret); | |
f99b9b7c JB |
548 | |
549 | return ret; | |
ccd979bd MF |
550 | } |
551 | ||
2ae99a60 MF |
552 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
553 | u32 clusters_to_add, int mark_unwritten) | |
ccd979bd MF |
554 | { |
555 | int status = 0; | |
556 | int restart_func = 0; | |
abf8b156 | 557 | int credits; |
2ae99a60 | 558 | u32 prev_clusters; |
ccd979bd MF |
559 | struct buffer_head *bh = NULL; |
560 | struct ocfs2_dinode *fe = NULL; | |
1fabe148 | 561 | handle_t *handle = NULL; |
ccd979bd MF |
562 | struct ocfs2_alloc_context *data_ac = NULL; |
563 | struct ocfs2_alloc_context *meta_ac = NULL; | |
564 | enum ocfs2_alloc_restarted why; | |
565 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 566 | struct ocfs2_extent_tree et; |
a90714c1 | 567 | int did_quota = 0; |
ccd979bd | 568 | |
ef6b689b | 569 | mlog(0, "(clusters_to_add = %u)\n", clusters_to_add); |
ccd979bd | 570 | |
dcd0538f MF |
571 | /* |
572 | * This function only exists for file systems which don't | |
573 | * support holes. | |
574 | */ | |
2ae99a60 | 575 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
dcd0538f | 576 | |
b657c95c | 577 | status = ocfs2_read_inode_block(inode, &bh); |
ccd979bd MF |
578 | if (status < 0) { |
579 | mlog_errno(status); | |
580 | goto leave; | |
581 | } | |
ccd979bd | 582 | fe = (struct ocfs2_dinode *) bh->b_data; |
ccd979bd MF |
583 | |
584 | restart_all: | |
585 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); | |
586 | ||
e7d4cb6b TM |
587 | mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, " |
588 | "clusters_to_add = %u\n", | |
589 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
590 | (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters), | |
591 | clusters_to_add); | |
5e404e9e | 592 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
f99b9b7c JB |
593 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
594 | &data_ac, &meta_ac); | |
9517bac6 MF |
595 | if (status) { |
596 | mlog_errno(status); | |
597 | goto leave; | |
598 | } | |
599 | ||
811f933d TM |
600 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list, |
601 | clusters_to_add); | |
65eff9cc | 602 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
603 | if (IS_ERR(handle)) { |
604 | status = PTR_ERR(handle); | |
605 | handle = NULL; | |
606 | mlog_errno(status); | |
607 | goto leave; | |
608 | } | |
609 | ||
610 | restarted_transaction: | |
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) { | |
657 | mlog(0, "restarting function.\n"); | |
658 | restart_func = 1; | |
79681842 | 659 | status = 0; |
ccd979bd MF |
660 | } else { |
661 | BUG_ON(why != RESTART_TRANS); | |
662 | ||
663 | mlog(0, "restarting transaction.\n"); | |
664 | /* TODO: This can be more intelligent. */ | |
665 | credits = ocfs2_calc_extend_credits(osb->sb, | |
811f933d | 666 | &fe->id2.i_list, |
ccd979bd | 667 | clusters_to_add); |
1fabe148 | 668 | status = ocfs2_extend_trans(handle, credits); |
ccd979bd MF |
669 | if (status < 0) { |
670 | /* handle still has to be committed at | |
671 | * this point. */ | |
672 | status = -ENOMEM; | |
673 | mlog_errno(status); | |
674 | goto leave; | |
675 | } | |
676 | goto restarted_transaction; | |
677 | } | |
678 | } | |
679 | ||
b0697053 | 680 | mlog(0, "fe: i_clusters = %u, i_size=%llu\n", |
1ca1a111 MF |
681 | le32_to_cpu(fe->i_clusters), |
682 | (unsigned long long)le64_to_cpu(fe->i_size)); | |
ccd979bd | 683 | mlog(0, "inode: ip_clusters=%u, i_size=%lld\n", |
634bf74d | 684 | OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode)); |
ccd979bd MF |
685 | |
686 | leave: | |
a90714c1 | 687 | if (status < 0 && did_quota) |
5dd4056d | 688 | dquot_free_space(inode, |
a90714c1 | 689 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
ccd979bd | 690 | if (handle) { |
02dc1af4 | 691 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
692 | handle = NULL; |
693 | } | |
694 | if (data_ac) { | |
695 | ocfs2_free_alloc_context(data_ac); | |
696 | data_ac = NULL; | |
697 | } | |
698 | if (meta_ac) { | |
699 | ocfs2_free_alloc_context(meta_ac); | |
700 | meta_ac = NULL; | |
701 | } | |
702 | if ((!status) && restart_func) { | |
703 | restart_func = 0; | |
704 | goto restart_all; | |
705 | } | |
a81cb88b MF |
706 | brelse(bh); |
707 | bh = NULL; | |
ccd979bd | 708 | |
ccd979bd MF |
709 | return status; |
710 | } | |
711 | ||
a4bfb4cf JB |
712 | /* |
713 | * While a write will already be ordering the data, a truncate will not. | |
714 | * Thus, we need to explicitly order the zeroed pages. | |
715 | */ | |
716 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode) | |
717 | { | |
718 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
719 | handle_t *handle = NULL; | |
720 | int ret = 0; | |
721 | ||
722 | if (!ocfs2_should_order_data(inode)) | |
723 | goto out; | |
724 | ||
725 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
726 | if (IS_ERR(handle)) { | |
727 | ret = -ENOMEM; | |
728 | mlog_errno(ret); | |
729 | goto out; | |
730 | } | |
731 | ||
732 | ret = ocfs2_jbd2_file_inode(handle, inode); | |
733 | if (ret < 0) | |
734 | mlog_errno(ret); | |
735 | ||
736 | out: | |
737 | if (ret) { | |
738 | if (!IS_ERR(handle)) | |
739 | ocfs2_commit_trans(osb, handle); | |
740 | handle = ERR_PTR(ret); | |
741 | } | |
742 | return handle; | |
743 | } | |
744 | ||
ccd979bd MF |
745 | /* Some parts of this taken from generic_cont_expand, which turned out |
746 | * to be too fragile to do exactly what we need without us having to | |
4e02ed4b | 747 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
a4bfb4cf JB |
748 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
749 | u64 abs_to) | |
ccd979bd MF |
750 | { |
751 | struct address_space *mapping = inode->i_mapping; | |
752 | struct page *page; | |
a4bfb4cf | 753 | unsigned long index = abs_from >> PAGE_CACHE_SHIFT; |
1fabe148 | 754 | handle_t *handle = NULL; |
5453258d | 755 | int ret = 0; |
a4bfb4cf | 756 | unsigned zero_from, zero_to, block_start, block_end; |
ccd979bd | 757 | |
a4bfb4cf JB |
758 | BUG_ON(abs_from >= abs_to); |
759 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT)); | |
760 | BUG_ON(abs_from & (inode->i_blkbits - 1)); | |
ccd979bd | 761 | |
9b4c0ff3 | 762 | page = find_or_create_page(mapping, index, GFP_NOFS); |
ccd979bd MF |
763 | if (!page) { |
764 | ret = -ENOMEM; | |
765 | mlog_errno(ret); | |
766 | goto out; | |
767 | } | |
768 | ||
a4bfb4cf JB |
769 | /* Get the offsets within the page that we want to zero */ |
770 | zero_from = abs_from & (PAGE_CACHE_SIZE - 1); | |
771 | zero_to = abs_to & (PAGE_CACHE_SIZE - 1); | |
772 | if (!zero_to) | |
773 | zero_to = PAGE_CACHE_SIZE; | |
ccd979bd | 774 | |
5693486b JB |
775 | mlog(0, |
776 | "abs_from = %llu, abs_to = %llu, index = %lu, zero_from = %u, zero_to = %u\n", | |
777 | (unsigned long long)abs_from, (unsigned long long)abs_to, | |
778 | index, zero_from, zero_to); | |
779 | ||
a4bfb4cf JB |
780 | /* We know that zero_from is block aligned */ |
781 | for (block_start = zero_from; block_start < zero_to; | |
782 | block_start = block_end) { | |
783 | block_end = block_start + (1 << inode->i_blkbits); | |
784 | ||
785 | /* | |
ebdec241 CH |
786 | * block_start is block-aligned. Bump it by one to force |
787 | * __block_write_begin and block_commit_write to zero the | |
a4bfb4cf JB |
788 | * whole block. |
789 | */ | |
ebdec241 CH |
790 | ret = __block_write_begin(page, block_start + 1, 0, |
791 | ocfs2_get_block); | |
a4bfb4cf JB |
792 | if (ret < 0) { |
793 | mlog_errno(ret); | |
ccd979bd MF |
794 | goto out_unlock; |
795 | } | |
ccd979bd | 796 | |
a4bfb4cf JB |
797 | if (!handle) { |
798 | handle = ocfs2_zero_start_ordered_transaction(inode); | |
799 | if (IS_ERR(handle)) { | |
800 | ret = PTR_ERR(handle); | |
801 | handle = NULL; | |
802 | break; | |
803 | } | |
804 | } | |
805 | ||
806 | /* must not update i_size! */ | |
807 | ret = block_commit_write(page, block_start + 1, | |
808 | block_start + 1); | |
809 | if (ret < 0) | |
810 | mlog_errno(ret); | |
811 | else | |
812 | ret = 0; | |
813 | } | |
ccd979bd MF |
814 | |
815 | if (handle) | |
02dc1af4 | 816 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
a4bfb4cf | 817 | |
ccd979bd MF |
818 | out_unlock: |
819 | unlock_page(page); | |
820 | page_cache_release(page); | |
821 | out: | |
822 | return ret; | |
823 | } | |
824 | ||
5693486b JB |
825 | /* |
826 | * Find the next range to zero. We do this in terms of bytes because | |
827 | * that's what ocfs2_zero_extend() wants, and it is dealing with the | |
828 | * pagecache. We may return multiple extents. | |
829 | * | |
830 | * zero_start and zero_end are ocfs2_zero_extend()s current idea of what | |
831 | * needs to be zeroed. range_start and range_end return the next zeroing | |
832 | * range. A subsequent call should pass the previous range_end as its | |
833 | * zero_start. If range_end is 0, there's nothing to do. | |
834 | * | |
835 | * Unwritten extents are skipped over. Refcounted extents are CoWd. | |
836 | */ | |
837 | static int ocfs2_zero_extend_get_range(struct inode *inode, | |
838 | struct buffer_head *di_bh, | |
839 | u64 zero_start, u64 zero_end, | |
840 | u64 *range_start, u64 *range_end) | |
ccd979bd | 841 | { |
5693486b JB |
842 | int rc = 0, needs_cow = 0; |
843 | u32 p_cpos, zero_clusters = 0; | |
844 | u32 zero_cpos = | |
845 | zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
846 | u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end); | |
847 | unsigned int num_clusters = 0; | |
848 | unsigned int ext_flags = 0; | |
ccd979bd | 849 | |
5693486b JB |
850 | while (zero_cpos < last_cpos) { |
851 | rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos, | |
852 | &num_clusters, &ext_flags); | |
853 | if (rc) { | |
854 | mlog_errno(rc); | |
ccd979bd MF |
855 | goto out; |
856 | } | |
857 | ||
5693486b JB |
858 | if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) { |
859 | zero_clusters = num_clusters; | |
860 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
861 | needs_cow = 1; | |
862 | break; | |
863 | } | |
864 | ||
865 | zero_cpos += num_clusters; | |
866 | } | |
867 | if (!zero_clusters) { | |
868 | *range_end = 0; | |
869 | goto out; | |
870 | } | |
871 | ||
872 | while ((zero_cpos + zero_clusters) < last_cpos) { | |
873 | rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters, | |
874 | &p_cpos, &num_clusters, | |
875 | &ext_flags); | |
876 | if (rc) { | |
877 | mlog_errno(rc); | |
878 | goto out; | |
879 | } | |
880 | ||
881 | if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN)) | |
882 | break; | |
883 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
884 | needs_cow = 1; | |
885 | zero_clusters += num_clusters; | |
886 | } | |
887 | if ((zero_cpos + zero_clusters) > last_cpos) | |
888 | zero_clusters = last_cpos - zero_cpos; | |
889 | ||
890 | if (needs_cow) { | |
15502712 TM |
891 | rc = ocfs2_refcount_cow(inode, NULL, di_bh, zero_cpos, |
892 | zero_clusters, UINT_MAX); | |
5693486b JB |
893 | if (rc) { |
894 | mlog_errno(rc); | |
895 | goto out; | |
896 | } | |
897 | } | |
898 | ||
899 | *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos); | |
900 | *range_end = ocfs2_clusters_to_bytes(inode->i_sb, | |
901 | zero_cpos + zero_clusters); | |
902 | ||
903 | out: | |
904 | return rc; | |
905 | } | |
906 | ||
907 | /* | |
908 | * Zero one range returned from ocfs2_zero_extend_get_range(). The caller | |
909 | * has made sure that the entire range needs zeroing. | |
910 | */ | |
911 | static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start, | |
912 | u64 range_end) | |
913 | { | |
914 | int rc = 0; | |
915 | u64 next_pos; | |
916 | u64 zero_pos = range_start; | |
917 | ||
918 | mlog(0, "range_start = %llu, range_end = %llu\n", | |
919 | (unsigned long long)range_start, | |
920 | (unsigned long long)range_end); | |
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)); | |
952 | mlog(0, "zero_start %llu for i_size %llu\n", | |
953 | (unsigned long long)zero_start, | |
954 | (unsigned long long)i_size_read(inode)); | |
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 | |
ef6b689b TM |
1103 | mlog(0, "(0x%p, '%.*s')\n", dentry, |
1104 | dentry->d_name.len, dentry->d_name.name); | |
ccd979bd | 1105 | |
bc535809 SM |
1106 | /* ensuring we don't even attempt to truncate a symlink */ |
1107 | if (S_ISLNK(inode->i_mode)) | |
1108 | attr->ia_valid &= ~ATTR_SIZE; | |
1109 | ||
ccd979bd MF |
1110 | if (attr->ia_valid & ATTR_MODE) |
1111 | mlog(0, "mode change: %d\n", attr->ia_mode); | |
1112 | if (attr->ia_valid & ATTR_UID) | |
1113 | mlog(0, "uid change: %d\n", attr->ia_uid); | |
1114 | if (attr->ia_valid & ATTR_GID) | |
1115 | mlog(0, "gid change: %d\n", attr->ia_gid); | |
1116 | if (attr->ia_valid & ATTR_SIZE) | |
1117 | mlog(0, "size change...\n"); | |
1118 | if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME)) | |
1119 | mlog(0, "time change...\n"); | |
1120 | ||
1121 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ | |
1122 | | ATTR_GID | ATTR_UID | ATTR_MODE) | |
1123 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) { | |
1124 | mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid); | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | status = inode_change_ok(inode, attr); | |
1129 | if (status) | |
1130 | return status; | |
1131 | ||
12755627 DM |
1132 | if (is_quota_modification(inode, attr)) |
1133 | dquot_initialize(inode); | |
ccd979bd MF |
1134 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
1135 | if (size_change) { | |
1136 | status = ocfs2_rw_lock(inode, 1); | |
1137 | if (status < 0) { | |
1138 | mlog_errno(status); | |
1139 | goto bail; | |
1140 | } | |
1141 | } | |
1142 | ||
e63aecb6 | 1143 | status = ocfs2_inode_lock(inode, &bh, 1); |
ccd979bd MF |
1144 | if (status < 0) { |
1145 | if (status != -ENOENT) | |
1146 | mlog_errno(status); | |
1147 | goto bail_unlock_rw; | |
1148 | } | |
1149 | ||
1150 | if (size_change && attr->ia_size != i_size_read(inode)) { | |
5051f768 WW |
1151 | status = inode_newsize_ok(inode, attr->ia_size); |
1152 | if (status) | |
ce76fd30 | 1153 | goto bail_unlock; |
ce76fd30 | 1154 | |
2b4e30fb JB |
1155 | if (i_size_read(inode) > attr->ia_size) { |
1156 | if (ocfs2_should_order_data(inode)) { | |
1157 | status = ocfs2_begin_ordered_truncate(inode, | |
1158 | attr->ia_size); | |
1159 | if (status) | |
1160 | goto bail_unlock; | |
1161 | } | |
ccd979bd | 1162 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
2b4e30fb | 1163 | } else |
65ed39d6 | 1164 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
ccd979bd MF |
1165 | if (status < 0) { |
1166 | if (status != -ENOSPC) | |
1167 | mlog_errno(status); | |
1168 | status = -ENOSPC; | |
1169 | goto bail_unlock; | |
1170 | } | |
1171 | } | |
1172 | ||
a90714c1 JK |
1173 | if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || |
1174 | (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { | |
65bac575 JK |
1175 | /* |
1176 | * Gather pointers to quota structures so that allocation / | |
1177 | * freeing of quota structures happens here and not inside | |
b43fa828 | 1178 | * dquot_transfer() where we have problems with lock ordering |
65bac575 | 1179 | */ |
a90714c1 JK |
1180 | if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid |
1181 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1182 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { | |
65bac575 JK |
1183 | transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid, |
1184 | USRQUOTA); | |
52a9ee28 | 1185 | if (!transfer_to[USRQUOTA]) { |
65bac575 | 1186 | status = -ESRCH; |
a90714c1 | 1187 | goto bail_unlock; |
65bac575 | 1188 | } |
a90714c1 JK |
1189 | } |
1190 | if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid | |
1191 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1192 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { | |
65bac575 JK |
1193 | transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid, |
1194 | GRPQUOTA); | |
52a9ee28 | 1195 | if (!transfer_to[GRPQUOTA]) { |
65bac575 | 1196 | status = -ESRCH; |
a90714c1 | 1197 | goto bail_unlock; |
65bac575 | 1198 | } |
a90714c1 | 1199 | } |
65bac575 JK |
1200 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
1201 | 2 * ocfs2_quota_trans_credits(sb)); | |
a90714c1 JK |
1202 | if (IS_ERR(handle)) { |
1203 | status = PTR_ERR(handle); | |
1204 | mlog_errno(status); | |
1205 | goto bail_unlock; | |
1206 | } | |
52a9ee28 | 1207 | status = __dquot_transfer(inode, transfer_to); |
a90714c1 JK |
1208 | if (status < 0) |
1209 | goto bail_commit; | |
1210 | } else { | |
1211 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1212 | if (IS_ERR(handle)) { | |
1213 | status = PTR_ERR(handle); | |
1214 | mlog_errno(status); | |
1215 | goto bail_unlock; | |
1216 | } | |
ccd979bd MF |
1217 | } |
1218 | ||
7307de80 | 1219 | /* |
2c27c65e | 1220 | * This will intentionally not wind up calling truncate_setsize(), |
7307de80 MF |
1221 | * since all the work for a size change has been done above. |
1222 | * Otherwise, we could get into problems with truncate as | |
1223 | * ip_alloc_sem is used there to protect against i_size | |
1224 | * changes. | |
1025774c CH |
1225 | * |
1226 | * XXX: this means the conditional below can probably be removed. | |
7307de80 | 1227 | */ |
1025774c CH |
1228 | if ((attr->ia_valid & ATTR_SIZE) && |
1229 | attr->ia_size != i_size_read(inode)) { | |
1230 | status = vmtruncate(inode, attr->ia_size); | |
1231 | if (status) { | |
1232 | mlog_errno(status); | |
1233 | goto bail_commit; | |
1234 | } | |
ccd979bd MF |
1235 | } |
1236 | ||
1025774c CH |
1237 | setattr_copy(inode, attr); |
1238 | mark_inode_dirty(inode); | |
1239 | ||
ccd979bd MF |
1240 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
1241 | if (status < 0) | |
1242 | mlog_errno(status); | |
1243 | ||
1244 | bail_commit: | |
02dc1af4 | 1245 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1246 | bail_unlock: |
e63aecb6 | 1247 | ocfs2_inode_unlock(inode, 1); |
ccd979bd MF |
1248 | bail_unlock_rw: |
1249 | if (size_change) | |
1250 | ocfs2_rw_unlock(inode, 1); | |
1251 | bail: | |
a81cb88b | 1252 | brelse(bh); |
ccd979bd | 1253 | |
65bac575 | 1254 | /* Release quota pointers in case we acquired them */ |
52a9ee28 | 1255 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) |
65bac575 | 1256 | dqput(transfer_to[qtype]); |
65bac575 | 1257 | |
060bc66d TY |
1258 | if (!status && attr->ia_valid & ATTR_MODE) { |
1259 | status = ocfs2_acl_chmod(inode); | |
1260 | if (status < 0) | |
1261 | mlog_errno(status); | |
1262 | } | |
1263 | ||
ccd979bd MF |
1264 | return status; |
1265 | } | |
1266 | ||
1267 | int ocfs2_getattr(struct vfsmount *mnt, | |
1268 | struct dentry *dentry, | |
1269 | struct kstat *stat) | |
1270 | { | |
1271 | struct inode *inode = dentry->d_inode; | |
1272 | struct super_block *sb = dentry->d_inode->i_sb; | |
1273 | struct ocfs2_super *osb = sb->s_fs_info; | |
1274 | int err; | |
1275 | ||
ccd979bd MF |
1276 | err = ocfs2_inode_revalidate(dentry); |
1277 | if (err) { | |
1278 | if (err != -ENOENT) | |
1279 | mlog_errno(err); | |
1280 | goto bail; | |
1281 | } | |
1282 | ||
1283 | generic_fillattr(inode, stat); | |
1284 | ||
1285 | /* We set the blksize from the cluster size for performance */ | |
1286 | stat->blksize = osb->s_clustersize; | |
1287 | ||
1288 | bail: | |
ccd979bd MF |
1289 | return err; |
1290 | } | |
1291 | ||
b74c79e9 | 1292 | int ocfs2_permission(struct inode *inode, int mask, unsigned int flags) |
d38eb8db TY |
1293 | { |
1294 | int ret; | |
1295 | ||
b74c79e9 NP |
1296 | if (flags & IPERM_FLAG_RCU) |
1297 | return -ECHILD; | |
1298 | ||
e63aecb6 | 1299 | ret = ocfs2_inode_lock(inode, NULL, 0); |
d38eb8db | 1300 | if (ret) { |
a9f5f707 MF |
1301 | if (ret != -ENOENT) |
1302 | mlog_errno(ret); | |
d38eb8db TY |
1303 | goto out; |
1304 | } | |
1305 | ||
b74c79e9 | 1306 | ret = generic_permission(inode, mask, flags, ocfs2_check_acl); |
d38eb8db | 1307 | |
e63aecb6 | 1308 | ocfs2_inode_unlock(inode, 0); |
d38eb8db | 1309 | out: |
d38eb8db TY |
1310 | return ret; |
1311 | } | |
1312 | ||
b2580103 MF |
1313 | static int __ocfs2_write_remove_suid(struct inode *inode, |
1314 | struct buffer_head *bh) | |
ccd979bd MF |
1315 | { |
1316 | int ret; | |
1fabe148 | 1317 | handle_t *handle; |
ccd979bd MF |
1318 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1319 | struct ocfs2_dinode *di; | |
1320 | ||
ef6b689b TM |
1321 | mlog(0, "(Inode %llu, mode 0%o)\n", |
1322 | (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode); | |
ccd979bd | 1323 | |
65eff9cc | 1324 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
1325 | if (IS_ERR(handle)) { |
1326 | ret = PTR_ERR(handle); | |
ccd979bd MF |
1327 | mlog_errno(ret); |
1328 | goto out; | |
1329 | } | |
1330 | ||
0cf2f763 | 1331 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 1332 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1333 | if (ret < 0) { |
1334 | mlog_errno(ret); | |
b2580103 | 1335 | goto out_trans; |
ccd979bd MF |
1336 | } |
1337 | ||
1338 | inode->i_mode &= ~S_ISUID; | |
1339 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) | |
1340 | inode->i_mode &= ~S_ISGID; | |
1341 | ||
1342 | di = (struct ocfs2_dinode *) bh->b_data; | |
1343 | di->i_mode = cpu_to_le16(inode->i_mode); | |
1344 | ||
ec20cec7 | 1345 | ocfs2_journal_dirty(handle, bh); |
b2580103 | 1346 | |
ccd979bd | 1347 | out_trans: |
02dc1af4 | 1348 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1349 | out: |
ccd979bd MF |
1350 | return ret; |
1351 | } | |
1352 | ||
9517bac6 MF |
1353 | /* |
1354 | * Will look for holes and unwritten extents in the range starting at | |
1355 | * pos for count bytes (inclusive). | |
1356 | */ | |
1357 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, | |
1358 | size_t count) | |
1359 | { | |
1360 | int ret = 0; | |
49cb8d2d | 1361 | unsigned int extent_flags; |
9517bac6 MF |
1362 | u32 cpos, clusters, extent_len, phys_cpos; |
1363 | struct super_block *sb = inode->i_sb; | |
1364 | ||
1365 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
1366 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
1367 | ||
1368 | while (clusters) { | |
49cb8d2d MF |
1369 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
1370 | &extent_flags); | |
9517bac6 MF |
1371 | if (ret < 0) { |
1372 | mlog_errno(ret); | |
1373 | goto out; | |
1374 | } | |
1375 | ||
49cb8d2d | 1376 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
9517bac6 MF |
1377 | ret = 1; |
1378 | break; | |
1379 | } | |
1380 | ||
1381 | if (extent_len > clusters) | |
1382 | extent_len = clusters; | |
1383 | ||
1384 | clusters -= extent_len; | |
1385 | cpos += extent_len; | |
1386 | } | |
1387 | out: | |
1388 | return ret; | |
1389 | } | |
1390 | ||
b2580103 MF |
1391 | static int ocfs2_write_remove_suid(struct inode *inode) |
1392 | { | |
1393 | int ret; | |
1394 | struct buffer_head *bh = NULL; | |
b2580103 | 1395 | |
b657c95c | 1396 | ret = ocfs2_read_inode_block(inode, &bh); |
b2580103 MF |
1397 | if (ret < 0) { |
1398 | mlog_errno(ret); | |
1399 | goto out; | |
1400 | } | |
1401 | ||
1402 | ret = __ocfs2_write_remove_suid(inode, bh); | |
1403 | out: | |
1404 | brelse(bh); | |
1405 | return ret; | |
1406 | } | |
1407 | ||
2ae99a60 MF |
1408 | /* |
1409 | * Allocate enough extents to cover the region starting at byte offset | |
1410 | * start for len bytes. Existing extents are skipped, any extents | |
1411 | * added are marked as "unwritten". | |
1412 | */ | |
1413 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, | |
1414 | u64 start, u64 len) | |
1415 | { | |
1416 | int ret; | |
1417 | u32 cpos, phys_cpos, clusters, alloc_size; | |
1afc32b9 MF |
1418 | u64 end = start + len; |
1419 | struct buffer_head *di_bh = NULL; | |
1420 | ||
1421 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
b657c95c | 1422 | ret = ocfs2_read_inode_block(inode, &di_bh); |
1afc32b9 MF |
1423 | if (ret) { |
1424 | mlog_errno(ret); | |
1425 | goto out; | |
1426 | } | |
1427 | ||
1428 | /* | |
1429 | * Nothing to do if the requested reservation range | |
1430 | * fits within the inode. | |
1431 | */ | |
1432 | if (ocfs2_size_fits_inline_data(di_bh, end)) | |
1433 | goto out; | |
1434 | ||
1435 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1436 | if (ret) { | |
1437 | mlog_errno(ret); | |
1438 | goto out; | |
1439 | } | |
1440 | } | |
2ae99a60 MF |
1441 | |
1442 | /* | |
1443 | * We consider both start and len to be inclusive. | |
1444 | */ | |
1445 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1446 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); | |
1447 | clusters -= cpos; | |
1448 | ||
1449 | while (clusters) { | |
1450 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1451 | &alloc_size, NULL); | |
1452 | if (ret) { | |
1453 | mlog_errno(ret); | |
1454 | goto out; | |
1455 | } | |
1456 | ||
1457 | /* | |
1458 | * Hole or existing extent len can be arbitrary, so | |
1459 | * cap it to our own allocation request. | |
1460 | */ | |
1461 | if (alloc_size > clusters) | |
1462 | alloc_size = clusters; | |
1463 | ||
1464 | if (phys_cpos) { | |
1465 | /* | |
1466 | * We already have an allocation at this | |
1467 | * region so we can safely skip it. | |
1468 | */ | |
1469 | goto next; | |
1470 | } | |
1471 | ||
1472 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); | |
1473 | if (ret) { | |
1474 | if (ret != -ENOSPC) | |
1475 | mlog_errno(ret); | |
1476 | goto out; | |
1477 | } | |
1478 | ||
1479 | next: | |
1480 | cpos += alloc_size; | |
1481 | clusters -= alloc_size; | |
1482 | } | |
1483 | ||
1484 | ret = 0; | |
1485 | out: | |
1afc32b9 MF |
1486 | |
1487 | brelse(di_bh); | |
2ae99a60 MF |
1488 | return ret; |
1489 | } | |
1490 | ||
063c4561 MF |
1491 | /* |
1492 | * Truncate a byte range, avoiding pages within partial clusters. This | |
1493 | * preserves those pages for the zeroing code to write to. | |
1494 | */ | |
1495 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, | |
1496 | u64 byte_len) | |
1497 | { | |
1498 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1499 | loff_t start, end; | |
1500 | struct address_space *mapping = inode->i_mapping; | |
1501 | ||
1502 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); | |
1503 | end = byte_start + byte_len; | |
1504 | end = end & ~(osb->s_clustersize - 1); | |
1505 | ||
1506 | if (start < end) { | |
1507 | unmap_mapping_range(mapping, start, end - start, 0); | |
1508 | truncate_inode_pages_range(mapping, start, end - 1); | |
1509 | } | |
1510 | } | |
1511 | ||
1512 | static int ocfs2_zero_partial_clusters(struct inode *inode, | |
1513 | u64 start, u64 len) | |
1514 | { | |
1515 | int ret = 0; | |
1516 | u64 tmpend, end = start + len; | |
1517 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1518 | unsigned int csize = osb->s_clustersize; | |
1519 | handle_t *handle; | |
1520 | ||
1521 | /* | |
1522 | * The "start" and "end" values are NOT necessarily part of | |
1523 | * the range whose allocation is being deleted. Rather, this | |
1524 | * is what the user passed in with the request. We must zero | |
1525 | * partial clusters here. There's no need to worry about | |
1526 | * physical allocation - the zeroing code knows to skip holes. | |
1527 | */ | |
1528 | mlog(0, "byte start: %llu, end: %llu\n", | |
1529 | (unsigned long long)start, (unsigned long long)end); | |
1530 | ||
1531 | /* | |
1532 | * If both edges are on a cluster boundary then there's no | |
1533 | * zeroing required as the region is part of the allocation to | |
1534 | * be truncated. | |
1535 | */ | |
1536 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) | |
1537 | goto out; | |
1538 | ||
1539 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
1540 | if (IS_ERR(handle)) { |
1541 | ret = PTR_ERR(handle); | |
063c4561 MF |
1542 | mlog_errno(ret); |
1543 | goto out; | |
1544 | } | |
1545 | ||
1546 | /* | |
1547 | * We want to get the byte offset of the end of the 1st cluster. | |
1548 | */ | |
1549 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); | |
1550 | if (tmpend > end) | |
1551 | tmpend = end; | |
1552 | ||
1553 | mlog(0, "1st range: start: %llu, tmpend: %llu\n", | |
1554 | (unsigned long long)start, (unsigned long long)tmpend); | |
1555 | ||
1556 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); | |
1557 | if (ret) | |
1558 | mlog_errno(ret); | |
1559 | ||
1560 | if (tmpend < end) { | |
1561 | /* | |
1562 | * This may make start and end equal, but the zeroing | |
1563 | * code will skip any work in that case so there's no | |
1564 | * need to catch it up here. | |
1565 | */ | |
1566 | start = end & ~(osb->s_clustersize - 1); | |
1567 | ||
1568 | mlog(0, "2nd range: start: %llu, end: %llu\n", | |
1569 | (unsigned long long)start, (unsigned long long)end); | |
1570 | ||
1571 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); | |
1572 | if (ret) | |
1573 | mlog_errno(ret); | |
1574 | } | |
1575 | ||
1576 | ocfs2_commit_trans(osb, handle); | |
1577 | out: | |
1578 | return ret; | |
1579 | } | |
1580 | ||
c1631d4a TY |
1581 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
1582 | { | |
1583 | int i; | |
1584 | struct ocfs2_extent_rec *rec = NULL; | |
1585 | ||
1586 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
1587 | ||
1588 | rec = &el->l_recs[i]; | |
1589 | ||
1590 | if (le32_to_cpu(rec->e_cpos) < pos) | |
1591 | break; | |
1592 | } | |
1593 | ||
1594 | return i; | |
1595 | } | |
1596 | ||
1597 | /* | |
1598 | * Helper to calculate the punching pos and length in one run, we handle the | |
1599 | * following three cases in order: | |
1600 | * | |
1601 | * - remove the entire record | |
1602 | * - remove a partial record | |
1603 | * - no record needs to be removed (hole-punching completed) | |
1604 | */ | |
1605 | static void ocfs2_calc_trunc_pos(struct inode *inode, | |
1606 | struct ocfs2_extent_list *el, | |
1607 | struct ocfs2_extent_rec *rec, | |
1608 | u32 trunc_start, u32 *trunc_cpos, | |
1609 | u32 *trunc_len, u32 *trunc_end, | |
1610 | u64 *blkno, int *done) | |
1611 | { | |
1612 | int ret = 0; | |
1613 | u32 coff, range; | |
1614 | ||
1615 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); | |
1616 | ||
1617 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { | |
1618 | *trunc_cpos = le32_to_cpu(rec->e_cpos); | |
1619 | /* | |
1620 | * Skip holes if any. | |
1621 | */ | |
1622 | if (range < *trunc_end) | |
1623 | *trunc_end = range; | |
1624 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); | |
1625 | *blkno = le64_to_cpu(rec->e_blkno); | |
1626 | *trunc_end = le32_to_cpu(rec->e_cpos); | |
1627 | } else if (range > trunc_start) { | |
1628 | *trunc_cpos = trunc_start; | |
1629 | *trunc_len = *trunc_end - trunc_start; | |
1630 | coff = trunc_start - le32_to_cpu(rec->e_cpos); | |
1631 | *blkno = le64_to_cpu(rec->e_blkno) + | |
1632 | ocfs2_clusters_to_blocks(inode->i_sb, coff); | |
1633 | *trunc_end = trunc_start; | |
1634 | } else { | |
1635 | /* | |
1636 | * It may have two following possibilities: | |
1637 | * | |
1638 | * - last record has been removed | |
1639 | * - trunc_start was within a hole | |
1640 | * | |
1641 | * both two cases mean the completion of hole punching. | |
1642 | */ | |
1643 | ret = 1; | |
1644 | } | |
1645 | ||
1646 | *done = ret; | |
1647 | } | |
1648 | ||
063c4561 MF |
1649 | static int ocfs2_remove_inode_range(struct inode *inode, |
1650 | struct buffer_head *di_bh, u64 byte_start, | |
1651 | u64 byte_len) | |
1652 | { | |
c1631d4a TY |
1653 | int ret = 0, flags = 0, done = 0, i; |
1654 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; | |
1655 | u32 cluster_in_el; | |
063c4561 MF |
1656 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1657 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
b1967d0e | 1658 | struct address_space *mapping = inode->i_mapping; |
fecc0112 | 1659 | struct ocfs2_extent_tree et; |
c1631d4a TY |
1660 | struct ocfs2_path *path = NULL; |
1661 | struct ocfs2_extent_list *el = NULL; | |
1662 | struct ocfs2_extent_rec *rec = NULL; | |
e8aec068 | 1663 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
c1631d4a | 1664 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
063c4561 | 1665 | |
5e404e9e | 1666 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
063c4561 MF |
1667 | ocfs2_init_dealloc_ctxt(&dealloc); |
1668 | ||
1669 | if (byte_len == 0) | |
1670 | return 0; | |
1671 | ||
1afc32b9 MF |
1672 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
1673 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, | |
b1967d0e MF |
1674 | byte_start + byte_len, 0); |
1675 | if (ret) { | |
1afc32b9 | 1676 | mlog_errno(ret); |
b1967d0e MF |
1677 | goto out; |
1678 | } | |
1679 | /* | |
1680 | * There's no need to get fancy with the page cache | |
1681 | * truncate of an inline-data inode. We're talking | |
1682 | * about less than a page here, which will be cached | |
1683 | * in the dinode buffer anyway. | |
1684 | */ | |
1685 | unmap_mapping_range(mapping, 0, 0, 0); | |
1686 | truncate_inode_pages(mapping, 0); | |
1687 | goto out; | |
1afc32b9 MF |
1688 | } |
1689 | ||
e8aec068 TY |
1690 | /* |
1691 | * For reflinks, we may need to CoW 2 clusters which might be | |
1692 | * partially zero'd later, if hole's start and end offset were | |
1693 | * within one cluster(means is not exactly aligned to clustersize). | |
1694 | */ | |
1695 | ||
1696 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { | |
1697 | ||
1698 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start); | |
1699 | if (ret) { | |
1700 | mlog_errno(ret); | |
1701 | goto out; | |
1702 | } | |
1703 | ||
1704 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len); | |
1705 | if (ret) { | |
1706 | mlog_errno(ret); | |
1707 | goto out; | |
1708 | } | |
1709 | } | |
1710 | ||
063c4561 | 1711 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
c1631d4a TY |
1712 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
1713 | cluster_in_el = trunc_end; | |
063c4561 | 1714 | |
c1631d4a | 1715 | mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, cend: %u\n", |
063c4561 MF |
1716 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
1717 | (unsigned long long)byte_start, | |
c1631d4a | 1718 | (unsigned long long)byte_len, trunc_start, trunc_end); |
063c4561 MF |
1719 | |
1720 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); | |
1721 | if (ret) { | |
1722 | mlog_errno(ret); | |
1723 | goto out; | |
1724 | } | |
1725 | ||
c1631d4a TY |
1726 | path = ocfs2_new_path_from_et(&et); |
1727 | if (!path) { | |
1728 | ret = -ENOMEM; | |
1729 | mlog_errno(ret); | |
1730 | goto out; | |
1731 | } | |
1732 | ||
1733 | while (trunc_end > trunc_start) { | |
1734 | ||
1735 | ret = ocfs2_find_path(INODE_CACHE(inode), path, | |
1736 | cluster_in_el); | |
063c4561 MF |
1737 | if (ret) { |
1738 | mlog_errno(ret); | |
1739 | goto out; | |
1740 | } | |
1741 | ||
c1631d4a | 1742 | el = path_leaf_el(path); |
063c4561 | 1743 | |
c1631d4a TY |
1744 | i = ocfs2_find_rec(el, trunc_end); |
1745 | /* | |
1746 | * Need to go to previous extent block. | |
1747 | */ | |
1748 | if (i < 0) { | |
1749 | if (path->p_tree_depth == 0) | |
1750 | break; | |
063c4561 | 1751 | |
c1631d4a TY |
1752 | ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, |
1753 | path, | |
1754 | &cluster_in_el); | |
063c4561 MF |
1755 | if (ret) { |
1756 | mlog_errno(ret); | |
1757 | goto out; | |
1758 | } | |
c1631d4a TY |
1759 | |
1760 | /* | |
1761 | * We've reached the leftmost extent block, | |
1762 | * it's safe to leave. | |
1763 | */ | |
1764 | if (cluster_in_el == 0) | |
1765 | break; | |
1766 | ||
1767 | /* | |
1768 | * The 'pos' searched for previous extent block is | |
1769 | * always one cluster less than actual trunc_end. | |
1770 | */ | |
1771 | trunc_end = cluster_in_el + 1; | |
1772 | ||
1773 | ocfs2_reinit_path(path, 1); | |
1774 | ||
1775 | continue; | |
1776 | ||
1777 | } else | |
1778 | rec = &el->l_recs[i]; | |
1779 | ||
1780 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos, | |
1781 | &trunc_len, &trunc_end, &blkno, &done); | |
1782 | if (done) | |
1783 | break; | |
1784 | ||
1785 | flags = rec->e_flags; | |
1786 | phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno); | |
1787 | ||
1788 | ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos, | |
1789 | phys_cpos, trunc_len, flags, | |
1790 | &dealloc, refcount_loc); | |
1791 | if (ret < 0) { | |
1792 | mlog_errno(ret); | |
1793 | goto out; | |
063c4561 MF |
1794 | } |
1795 | ||
c1631d4a TY |
1796 | cluster_in_el = trunc_end; |
1797 | ||
1798 | ocfs2_reinit_path(path, 1); | |
063c4561 MF |
1799 | } |
1800 | ||
1801 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); | |
1802 | ||
1803 | out: | |
1804 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
1805 | ocfs2_run_deallocs(osb, &dealloc); | |
1806 | ||
1807 | return ret; | |
1808 | } | |
1809 | ||
b2580103 MF |
1810 | /* |
1811 | * Parts of this function taken from xfs_change_file_space() | |
1812 | */ | |
385820a3 MF |
1813 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
1814 | loff_t f_pos, unsigned int cmd, | |
1815 | struct ocfs2_space_resv *sr, | |
1816 | int change_size) | |
b2580103 MF |
1817 | { |
1818 | int ret; | |
1819 | s64 llen; | |
385820a3 | 1820 | loff_t size; |
b2580103 MF |
1821 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1822 | struct buffer_head *di_bh = NULL; | |
1823 | handle_t *handle; | |
a00cce35 | 1824 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
b2580103 | 1825 | |
b2580103 MF |
1826 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
1827 | return -EROFS; | |
1828 | ||
1829 | mutex_lock(&inode->i_mutex); | |
1830 | ||
1831 | /* | |
1832 | * This prevents concurrent writes on other nodes | |
1833 | */ | |
1834 | ret = ocfs2_rw_lock(inode, 1); | |
1835 | if (ret) { | |
1836 | mlog_errno(ret); | |
1837 | goto out; | |
1838 | } | |
1839 | ||
e63aecb6 | 1840 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
b2580103 MF |
1841 | if (ret) { |
1842 | mlog_errno(ret); | |
1843 | goto out_rw_unlock; | |
1844 | } | |
1845 | ||
1846 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { | |
1847 | ret = -EPERM; | |
e63aecb6 | 1848 | goto out_inode_unlock; |
b2580103 MF |
1849 | } |
1850 | ||
1851 | switch (sr->l_whence) { | |
1852 | case 0: /*SEEK_SET*/ | |
1853 | break; | |
1854 | case 1: /*SEEK_CUR*/ | |
385820a3 | 1855 | sr->l_start += f_pos; |
b2580103 MF |
1856 | break; |
1857 | case 2: /*SEEK_END*/ | |
1858 | sr->l_start += i_size_read(inode); | |
1859 | break; | |
1860 | default: | |
1861 | ret = -EINVAL; | |
e63aecb6 | 1862 | goto out_inode_unlock; |
b2580103 MF |
1863 | } |
1864 | sr->l_whence = 0; | |
1865 | ||
1866 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; | |
1867 | ||
1868 | if (sr->l_start < 0 | |
1869 | || sr->l_start > max_off | |
1870 | || (sr->l_start + llen) < 0 | |
1871 | || (sr->l_start + llen) > max_off) { | |
1872 | ret = -EINVAL; | |
e63aecb6 | 1873 | goto out_inode_unlock; |
b2580103 | 1874 | } |
385820a3 | 1875 | size = sr->l_start + sr->l_len; |
b2580103 MF |
1876 | |
1877 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { | |
1878 | if (sr->l_len <= 0) { | |
1879 | ret = -EINVAL; | |
e63aecb6 | 1880 | goto out_inode_unlock; |
b2580103 MF |
1881 | } |
1882 | } | |
1883 | ||
385820a3 | 1884 | if (file && should_remove_suid(file->f_path.dentry)) { |
b2580103 MF |
1885 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
1886 | if (ret) { | |
1887 | mlog_errno(ret); | |
e63aecb6 | 1888 | goto out_inode_unlock; |
b2580103 MF |
1889 | } |
1890 | } | |
1891 | ||
1892 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1893 | switch (cmd) { | |
1894 | case OCFS2_IOC_RESVSP: | |
1895 | case OCFS2_IOC_RESVSP64: | |
1896 | /* | |
1897 | * This takes unsigned offsets, but the signed ones we | |
1898 | * pass have been checked against overflow above. | |
1899 | */ | |
1900 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, | |
1901 | sr->l_len); | |
1902 | break; | |
1903 | case OCFS2_IOC_UNRESVSP: | |
1904 | case OCFS2_IOC_UNRESVSP64: | |
1905 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, | |
1906 | sr->l_len); | |
1907 | break; | |
1908 | default: | |
1909 | ret = -EINVAL; | |
1910 | } | |
1911 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1912 | if (ret) { | |
1913 | mlog_errno(ret); | |
e63aecb6 | 1914 | goto out_inode_unlock; |
b2580103 MF |
1915 | } |
1916 | ||
1917 | /* | |
1918 | * We update c/mtime for these changes | |
1919 | */ | |
1920 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1921 | if (IS_ERR(handle)) { | |
1922 | ret = PTR_ERR(handle); | |
1923 | mlog_errno(ret); | |
e63aecb6 | 1924 | goto out_inode_unlock; |
b2580103 MF |
1925 | } |
1926 | ||
385820a3 MF |
1927 | if (change_size && i_size_read(inode) < size) |
1928 | i_size_write(inode, size); | |
1929 | ||
b2580103 MF |
1930 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
1931 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); | |
1932 | if (ret < 0) | |
1933 | mlog_errno(ret); | |
1934 | ||
1935 | ocfs2_commit_trans(osb, handle); | |
1936 | ||
e63aecb6 | 1937 | out_inode_unlock: |
b2580103 | 1938 | brelse(di_bh); |
e63aecb6 | 1939 | ocfs2_inode_unlock(inode, 1); |
b2580103 MF |
1940 | out_rw_unlock: |
1941 | ocfs2_rw_unlock(inode, 1); | |
1942 | ||
b2580103 | 1943 | out: |
c259ae52 | 1944 | mutex_unlock(&inode->i_mutex); |
b2580103 MF |
1945 | return ret; |
1946 | } | |
1947 | ||
385820a3 MF |
1948 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
1949 | struct ocfs2_space_resv *sr) | |
1950 | { | |
1951 | struct inode *inode = file->f_path.dentry->d_inode; | |
c19a28e1 | 1952 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
385820a3 MF |
1953 | |
1954 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && | |
1955 | !ocfs2_writes_unwritten_extents(osb)) | |
1956 | return -ENOTTY; | |
1957 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && | |
1958 | !ocfs2_sparse_alloc(osb)) | |
1959 | return -ENOTTY; | |
1960 | ||
1961 | if (!S_ISREG(inode->i_mode)) | |
1962 | return -EINVAL; | |
1963 | ||
1964 | if (!(file->f_mode & FMODE_WRITE)) | |
1965 | return -EBADF; | |
1966 | ||
1967 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); | |
1968 | } | |
1969 | ||
2fe17c10 | 1970 | static long ocfs2_fallocate(struct file *file, int mode, loff_t offset, |
385820a3 MF |
1971 | loff_t len) |
1972 | { | |
2fe17c10 | 1973 | struct inode *inode = file->f_path.dentry->d_inode; |
385820a3 MF |
1974 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1975 | struct ocfs2_space_resv sr; | |
1976 | int change_size = 1; | |
db47fef2 | 1977 | int cmd = OCFS2_IOC_RESVSP64; |
385820a3 | 1978 | |
64c23e86 CH |
1979 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
1980 | return -EOPNOTSUPP; | |
385820a3 MF |
1981 | if (!ocfs2_writes_unwritten_extents(osb)) |
1982 | return -EOPNOTSUPP; | |
1983 | ||
385820a3 MF |
1984 | if (mode & FALLOC_FL_KEEP_SIZE) |
1985 | change_size = 0; | |
1986 | ||
db47fef2 JB |
1987 | if (mode & FALLOC_FL_PUNCH_HOLE) |
1988 | cmd = OCFS2_IOC_UNRESVSP64; | |
1989 | ||
385820a3 MF |
1990 | sr.l_whence = 0; |
1991 | sr.l_start = (s64)offset; | |
1992 | sr.l_len = (s64)len; | |
1993 | ||
db47fef2 JB |
1994 | return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr, |
1995 | change_size); | |
385820a3 MF |
1996 | } |
1997 | ||
293b2f70 TM |
1998 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
1999 | size_t count) | |
2000 | { | |
2001 | int ret = 0; | |
2002 | unsigned int extent_flags; | |
2003 | u32 cpos, clusters, extent_len, phys_cpos; | |
2004 | struct super_block *sb = inode->i_sb; | |
2005 | ||
2006 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || | |
2f48d593 TM |
2007 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
2008 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) | |
293b2f70 TM |
2009 | return 0; |
2010 | ||
2011 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
2012 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
2013 | ||
2014 | while (clusters) { | |
2015 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, | |
2016 | &extent_flags); | |
2017 | if (ret < 0) { | |
2018 | mlog_errno(ret); | |
2019 | goto out; | |
2020 | } | |
2021 | ||
2022 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { | |
2023 | ret = 1; | |
2024 | break; | |
2025 | } | |
2026 | ||
2027 | if (extent_len > clusters) | |
2028 | extent_len = clusters; | |
2029 | ||
2030 | clusters -= extent_len; | |
2031 | cpos += extent_len; | |
2032 | } | |
2033 | out: | |
2034 | return ret; | |
2035 | } | |
2036 | ||
2037 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, | |
b8908236 | 2038 | struct file *file, |
293b2f70 TM |
2039 | loff_t pos, size_t count, |
2040 | int *meta_level) | |
2041 | { | |
2042 | int ret; | |
2043 | struct buffer_head *di_bh = NULL; | |
2044 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
2045 | u32 clusters = | |
2046 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; | |
2047 | ||
2048 | ret = ocfs2_inode_lock(inode, &di_bh, 1); | |
2049 | if (ret) { | |
2050 | mlog_errno(ret); | |
2051 | goto out; | |
2052 | } | |
2053 | ||
2054 | *meta_level = 1; | |
2055 | ||
15502712 | 2056 | ret = ocfs2_refcount_cow(inode, file, di_bh, cpos, clusters, UINT_MAX); |
293b2f70 TM |
2057 | if (ret) |
2058 | mlog_errno(ret); | |
2059 | out: | |
2060 | brelse(di_bh); | |
2061 | return ret; | |
2062 | } | |
2063 | ||
b8908236 | 2064 | static int ocfs2_prepare_inode_for_write(struct file *file, |
8659ac25 TY |
2065 | loff_t *ppos, |
2066 | size_t count, | |
9517bac6 | 2067 | int appending, |
86470e98 TM |
2068 | int *direct_io, |
2069 | int *has_refcount) | |
ccd979bd | 2070 | { |
65ed39d6 | 2071 | int ret = 0, meta_level = 0; |
b8908236 | 2072 | struct dentry *dentry = file->f_path.dentry; |
8659ac25 | 2073 | struct inode *inode = dentry->d_inode; |
65ed39d6 | 2074 | loff_t saved_pos, end; |
ccd979bd | 2075 | |
2bd63216 | 2076 | /* |
65ed39d6 MF |
2077 | * We start with a read level meta lock and only jump to an ex |
2078 | * if we need to make modifications here. | |
ccd979bd | 2079 | */ |
ccd979bd | 2080 | for(;;) { |
e63aecb6 | 2081 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
ccd979bd MF |
2082 | if (ret < 0) { |
2083 | meta_level = -1; | |
2084 | mlog_errno(ret); | |
2085 | goto out; | |
2086 | } | |
2087 | ||
2088 | /* Clear suid / sgid if necessary. We do this here | |
2089 | * instead of later in the write path because | |
2090 | * remove_suid() calls ->setattr without any hint that | |
2091 | * we may have already done our cluster locking. Since | |
2092 | * ocfs2_setattr() *must* take cluster locks to | |
2093 | * proceeed, this will lead us to recursively lock the | |
2094 | * inode. There's also the dinode i_size state which | |
2095 | * can be lost via setattr during extending writes (we | |
2096 | * set inode->i_size at the end of a write. */ | |
8659ac25 | 2097 | if (should_remove_suid(dentry)) { |
ccd979bd | 2098 | if (meta_level == 0) { |
e63aecb6 | 2099 | ocfs2_inode_unlock(inode, meta_level); |
ccd979bd MF |
2100 | meta_level = 1; |
2101 | continue; | |
2102 | } | |
2103 | ||
2104 | ret = ocfs2_write_remove_suid(inode); | |
2105 | if (ret < 0) { | |
2106 | mlog_errno(ret); | |
8659ac25 | 2107 | goto out_unlock; |
ccd979bd MF |
2108 | } |
2109 | } | |
2110 | ||
2111 | /* work on a copy of ppos until we're sure that we won't have | |
2112 | * to recalculate it due to relocking. */ | |
8659ac25 | 2113 | if (appending) { |
ccd979bd MF |
2114 | saved_pos = i_size_read(inode); |
2115 | mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos); | |
2116 | } else { | |
8659ac25 | 2117 | saved_pos = *ppos; |
ccd979bd | 2118 | } |
3a0782d0 | 2119 | |
65ed39d6 | 2120 | end = saved_pos + count; |
9517bac6 | 2121 | |
293b2f70 TM |
2122 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
2123 | if (ret == 1) { | |
2124 | ocfs2_inode_unlock(inode, meta_level); | |
2125 | meta_level = -1; | |
2126 | ||
2127 | ret = ocfs2_prepare_inode_for_refcount(inode, | |
b8908236 | 2128 | file, |
293b2f70 TM |
2129 | saved_pos, |
2130 | count, | |
2131 | &meta_level); | |
86470e98 TM |
2132 | if (has_refcount) |
2133 | *has_refcount = 1; | |
96a1cc73 WW |
2134 | if (direct_io) |
2135 | *direct_io = 0; | |
293b2f70 TM |
2136 | } |
2137 | ||
2138 | if (ret < 0) { | |
2139 | mlog_errno(ret); | |
2140 | goto out_unlock; | |
2141 | } | |
2142 | ||
65ed39d6 MF |
2143 | /* |
2144 | * Skip the O_DIRECT checks if we don't need | |
2145 | * them. | |
2146 | */ | |
2147 | if (!direct_io || !(*direct_io)) | |
9517bac6 | 2148 | break; |
9517bac6 | 2149 | |
1afc32b9 MF |
2150 | /* |
2151 | * There's no sane way to do direct writes to an inode | |
2152 | * with inline data. | |
2153 | */ | |
2154 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2155 | *direct_io = 0; | |
2156 | break; | |
2157 | } | |
2158 | ||
3a0782d0 | 2159 | /* |
65ed39d6 MF |
2160 | * Allowing concurrent direct writes means |
2161 | * i_size changes wouldn't be synchronized, so | |
2162 | * one node could wind up truncating another | |
2163 | * nodes writes. | |
3a0782d0 | 2164 | */ |
65ed39d6 MF |
2165 | if (end > i_size_read(inode)) { |
2166 | *direct_io = 0; | |
ccd979bd | 2167 | break; |
ccd979bd MF |
2168 | } |
2169 | ||
65ed39d6 MF |
2170 | /* |
2171 | * We don't fill holes during direct io, so | |
2172 | * check for them here. If any are found, the | |
2173 | * caller will have to retake some cluster | |
2174 | * locks and initiate the io as buffered. | |
2175 | */ | |
2176 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); | |
2177 | if (ret == 1) { | |
2178 | *direct_io = 0; | |
2179 | ret = 0; | |
2180 | } else if (ret < 0) | |
2181 | mlog_errno(ret); | |
ccd979bd MF |
2182 | break; |
2183 | } | |
2184 | ||
8659ac25 TY |
2185 | if (appending) |
2186 | *ppos = saved_pos; | |
2187 | ||
2188 | out_unlock: | |
293b2f70 TM |
2189 | if (meta_level >= 0) |
2190 | ocfs2_inode_unlock(inode, meta_level); | |
8659ac25 TY |
2191 | |
2192 | out: | |
2193 | return ret; | |
2194 | } | |
2195 | ||
2196 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, | |
2197 | const struct iovec *iov, | |
2198 | unsigned long nr_segs, | |
2199 | loff_t pos) | |
2200 | { | |
9517bac6 | 2201 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
86470e98 | 2202 | int can_do_direct, has_refcount = 0; |
9517bac6 MF |
2203 | ssize_t written = 0; |
2204 | size_t ocount; /* original count */ | |
2205 | size_t count; /* after file limit checks */ | |
9ea2d32f MF |
2206 | loff_t old_size, *ppos = &iocb->ki_pos; |
2207 | u32 old_clusters; | |
9517bac6 MF |
2208 | struct file *file = iocb->ki_filp; |
2209 | struct inode *inode = file->f_path.dentry->d_inode; | |
9ea2d32f | 2210 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
7bdb0d18 TY |
2211 | int full_coherency = !(osb->s_mount_opt & |
2212 | OCFS2_MOUNT_COHERENCY_BUFFERED); | |
9517bac6 | 2213 | |
ef6b689b TM |
2214 | mlog(0, "(0x%p, %u, '%.*s')\n", file, |
2215 | (unsigned int)nr_segs, | |
2216 | file->f_path.dentry->d_name.len, | |
2217 | file->f_path.dentry->d_name.name); | |
8659ac25 | 2218 | |
8659ac25 TY |
2219 | if (iocb->ki_left == 0) |
2220 | return 0; | |
2221 | ||
9517bac6 MF |
2222 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
2223 | ||
2224 | appending = file->f_flags & O_APPEND ? 1 : 0; | |
2225 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; | |
2226 | ||
8659ac25 | 2227 | mutex_lock(&inode->i_mutex); |
9517bac6 | 2228 | |
39c99f12 TY |
2229 | ocfs2_iocb_clear_sem_locked(iocb); |
2230 | ||
9517bac6 | 2231 | relock: |
8659ac25 | 2232 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ |
9517bac6 | 2233 | if (direct_io) { |
8659ac25 | 2234 | down_read(&inode->i_alloc_sem); |
9517bac6 | 2235 | have_alloc_sem = 1; |
39c99f12 TY |
2236 | /* communicate with ocfs2_dio_end_io */ |
2237 | ocfs2_iocb_set_sem_locked(iocb); | |
8659ac25 TY |
2238 | } |
2239 | ||
7bdb0d18 TY |
2240 | /* |
2241 | * Concurrent O_DIRECT writes are allowed with | |
2242 | * mount_option "coherency=buffered". | |
2243 | */ | |
2244 | rw_level = (!direct_io || full_coherency); | |
2245 | ||
8659ac25 TY |
2246 | ret = ocfs2_rw_lock(inode, rw_level); |
2247 | if (ret < 0) { | |
8659ac25 | 2248 | mlog_errno(ret); |
9517bac6 | 2249 | goto out_sems; |
8659ac25 TY |
2250 | } |
2251 | ||
7bdb0d18 TY |
2252 | /* |
2253 | * O_DIRECT writes with "coherency=full" need to take EX cluster | |
2254 | * inode_lock to guarantee coherency. | |
2255 | */ | |
2256 | if (direct_io && full_coherency) { | |
2257 | /* | |
2258 | * We need to take and drop the inode lock to force | |
2259 | * other nodes to drop their caches. Buffered I/O | |
2260 | * already does this in write_begin(). | |
2261 | */ | |
2262 | ret = ocfs2_inode_lock(inode, NULL, 1); | |
2263 | if (ret < 0) { | |
2264 | mlog_errno(ret); | |
2265 | goto out_sems; | |
2266 | } | |
2267 | ||
2268 | ocfs2_inode_unlock(inode, 1); | |
2269 | } | |
2270 | ||
9517bac6 | 2271 | can_do_direct = direct_io; |
b8908236 | 2272 | ret = ocfs2_prepare_inode_for_write(file, ppos, |
9517bac6 | 2273 | iocb->ki_left, appending, |
86470e98 | 2274 | &can_do_direct, &has_refcount); |
8659ac25 TY |
2275 | if (ret < 0) { |
2276 | mlog_errno(ret); | |
2277 | goto out; | |
2278 | } | |
ccd979bd | 2279 | |
9517bac6 MF |
2280 | /* |
2281 | * We can't complete the direct I/O as requested, fall back to | |
2282 | * buffered I/O. | |
2283 | */ | |
2284 | if (direct_io && !can_do_direct) { | |
2285 | ocfs2_rw_unlock(inode, rw_level); | |
2286 | up_read(&inode->i_alloc_sem); | |
2287 | ||
2288 | have_alloc_sem = 0; | |
2289 | rw_level = -1; | |
2290 | ||
2291 | direct_io = 0; | |
9517bac6 MF |
2292 | goto relock; |
2293 | } | |
2294 | ||
9ea2d32f MF |
2295 | /* |
2296 | * To later detect whether a journal commit for sync writes is | |
2297 | * necessary, we sample i_size, and cluster count here. | |
2298 | */ | |
2299 | old_size = i_size_read(inode); | |
2300 | old_clusters = OCFS2_I(inode)->ip_clusters; | |
2301 | ||
ccd979bd | 2302 | /* communicate with ocfs2_dio_end_io */ |
7cdfc3a1 | 2303 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd | 2304 | |
6b933c8e LD |
2305 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
2306 | VERIFY_READ); | |
2307 | if (ret) | |
2308 | goto out_dio; | |
b6af1bcd | 2309 | |
6b933c8e LD |
2310 | count = ocount; |
2311 | ret = generic_write_checks(file, ppos, &count, | |
2312 | S_ISBLK(inode->i_mode)); | |
2313 | if (ret) | |
2314 | goto out_dio; | |
b6af1bcd | 2315 | |
6b933c8e | 2316 | if (direct_io) { |
9517bac6 MF |
2317 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
2318 | ppos, count, ocount); | |
2319 | if (written < 0) { | |
2320 | ret = written; | |
2321 | goto out_dio; | |
2322 | } | |
2323 | } else { | |
6b933c8e LD |
2324 | current->backing_dev_info = file->f_mapping->backing_dev_info; |
2325 | written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos, | |
2326 | ppos, count, 0); | |
2327 | current->backing_dev_info = NULL; | |
9517bac6 | 2328 | } |
ccd979bd | 2329 | |
9517bac6 | 2330 | out_dio: |
ccd979bd | 2331 | /* buffered aio wouldn't have proper lock coverage today */ |
9517bac6 | 2332 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
ccd979bd | 2333 | |
60c48674 | 2334 | if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) || |
81c8c82b | 2335 | ((file->f_flags & O_DIRECT) && !direct_io)) { |
918941a3 JK |
2336 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
2337 | pos + count - 1); | |
2338 | if (ret < 0) | |
2339 | written = ret; | |
2340 | ||
a03ab788 CL |
2341 | if (!ret && ((old_size != i_size_read(inode)) || |
2342 | (old_clusters != OCFS2_I(inode)->ip_clusters) || | |
2343 | has_refcount)) { | |
2b4e30fb | 2344 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
9ea2d32f MF |
2345 | if (ret < 0) |
2346 | written = ret; | |
2347 | } | |
918941a3 JK |
2348 | |
2349 | if (!ret) | |
2350 | ret = filemap_fdatawait_range(file->f_mapping, pos, | |
2351 | pos + count - 1); | |
9ea2d32f MF |
2352 | } |
2353 | ||
2bd63216 | 2354 | /* |
ccd979bd MF |
2355 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
2356 | * function pointer which is called when o_direct io completes so that | |
2357 | * it can unlock our rw lock. (it's the clustered equivalent of | |
2358 | * i_alloc_sem; protects truncate from racing with pending ios). | |
2359 | * Unfortunately there are error cases which call end_io and others | |
2360 | * that don't. so we don't have to unlock the rw_lock if either an | |
2361 | * async dio is going to do it in the future or an end_io after an | |
2362 | * error has already done it. | |
2363 | */ | |
66b116c9 | 2364 | if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { |
ccd979bd MF |
2365 | rw_level = -1; |
2366 | have_alloc_sem = 0; | |
2367 | } | |
2368 | ||
2369 | out: | |
9517bac6 MF |
2370 | if (rw_level != -1) |
2371 | ocfs2_rw_unlock(inode, rw_level); | |
2372 | ||
2373 | out_sems: | |
39c99f12 | 2374 | if (have_alloc_sem) { |
ccd979bd | 2375 | up_read(&inode->i_alloc_sem); |
39c99f12 TY |
2376 | ocfs2_iocb_clear_sem_locked(iocb); |
2377 | } | |
9517bac6 | 2378 | |
1b1dcc1b | 2379 | mutex_unlock(&inode->i_mutex); |
ccd979bd | 2380 | |
812e7a6a WW |
2381 | if (written) |
2382 | ret = written; | |
812e7a6a | 2383 | return ret; |
ccd979bd MF |
2384 | } |
2385 | ||
328eaaba MS |
2386 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
2387 | struct file *out, | |
2388 | struct splice_desc *sd) | |
2389 | { | |
2390 | int ret; | |
2391 | ||
b8908236 | 2392 | ret = ocfs2_prepare_inode_for_write(out, &sd->pos, |
86470e98 | 2393 | sd->total_len, 0, NULL, NULL); |
328eaaba MS |
2394 | if (ret < 0) { |
2395 | mlog_errno(ret); | |
2396 | return ret; | |
2397 | } | |
2398 | ||
2399 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); | |
2400 | } | |
2401 | ||
8659ac25 TY |
2402 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
2403 | struct file *out, | |
2404 | loff_t *ppos, | |
2405 | size_t len, | |
2406 | unsigned int flags) | |
2407 | { | |
2408 | int ret; | |
328eaaba MS |
2409 | struct address_space *mapping = out->f_mapping; |
2410 | struct inode *inode = mapping->host; | |
2411 | struct splice_desc sd = { | |
2412 | .total_len = len, | |
2413 | .flags = flags, | |
2414 | .pos = *ppos, | |
2415 | .u.file = out, | |
2416 | }; | |
8659ac25 | 2417 | |
ef6b689b TM |
2418 | mlog(0, "(0x%p, 0x%p, %u, '%.*s')\n", out, pipe, |
2419 | (unsigned int)len, | |
2420 | out->f_path.dentry->d_name.len, | |
2421 | out->f_path.dentry->d_name.name); | |
8659ac25 | 2422 | |
328eaaba MS |
2423 | if (pipe->inode) |
2424 | mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT); | |
8659ac25 | 2425 | |
328eaaba MS |
2426 | splice_from_pipe_begin(&sd); |
2427 | do { | |
2428 | ret = splice_from_pipe_next(pipe, &sd); | |
2429 | if (ret <= 0) | |
2430 | break; | |
8659ac25 | 2431 | |
328eaaba MS |
2432 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
2433 | ret = ocfs2_rw_lock(inode, 1); | |
2434 | if (ret < 0) | |
2435 | mlog_errno(ret); | |
2436 | else { | |
2437 | ret = ocfs2_splice_to_file(pipe, out, &sd); | |
2438 | ocfs2_rw_unlock(inode, 1); | |
2439 | } | |
2440 | mutex_unlock(&inode->i_mutex); | |
2441 | } while (ret > 0); | |
2442 | splice_from_pipe_end(pipe, &sd); | |
8659ac25 | 2443 | |
7bfac9ec MS |
2444 | if (pipe->inode) |
2445 | mutex_unlock(&pipe->inode->i_mutex); | |
8659ac25 | 2446 | |
328eaaba MS |
2447 | if (sd.num_spliced) |
2448 | ret = sd.num_spliced; | |
2449 | ||
2450 | if (ret > 0) { | |
2451 | unsigned long nr_pages; | |
d23c937b | 2452 | int err; |
328eaaba | 2453 | |
328eaaba MS |
2454 | nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
2455 | ||
d23c937b JK |
2456 | err = generic_write_sync(out, *ppos, ret); |
2457 | if (err) | |
2458 | ret = err; | |
2459 | else | |
2460 | *ppos += ret; | |
328eaaba | 2461 | |
328eaaba MS |
2462 | balance_dirty_pages_ratelimited_nr(mapping, nr_pages); |
2463 | } | |
8659ac25 | 2464 | |
8659ac25 TY |
2465 | return ret; |
2466 | } | |
2467 | ||
2468 | static ssize_t ocfs2_file_splice_read(struct file *in, | |
2469 | loff_t *ppos, | |
2470 | struct pipe_inode_info *pipe, | |
2471 | size_t len, | |
2472 | unsigned int flags) | |
2473 | { | |
1962f39a | 2474 | int ret = 0, lock_level = 0; |
d28c9174 | 2475 | struct inode *inode = in->f_path.dentry->d_inode; |
8659ac25 | 2476 | |
ef6b689b TM |
2477 | mlog(0, "(0x%p, 0x%p, %u, '%.*s')\n", in, pipe, |
2478 | (unsigned int)len, | |
2479 | in->f_path.dentry->d_name.len, | |
2480 | in->f_path.dentry->d_name.name); | |
8659ac25 TY |
2481 | |
2482 | /* | |
2483 | * See the comment in ocfs2_file_aio_read() | |
2484 | */ | |
1962f39a | 2485 | ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level); |
8659ac25 TY |
2486 | if (ret < 0) { |
2487 | mlog_errno(ret); | |
2488 | goto bail; | |
2489 | } | |
1962f39a | 2490 | ocfs2_inode_unlock(inode, lock_level); |
8659ac25 TY |
2491 | |
2492 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); | |
2493 | ||
2494 | bail: | |
8659ac25 TY |
2495 | return ret; |
2496 | } | |
2497 | ||
ccd979bd | 2498 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
027445c3 BP |
2499 | const struct iovec *iov, |
2500 | unsigned long nr_segs, | |
ccd979bd MF |
2501 | loff_t pos) |
2502 | { | |
25899dee | 2503 | int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0; |
ccd979bd | 2504 | struct file *filp = iocb->ki_filp; |
d28c9174 | 2505 | struct inode *inode = filp->f_path.dentry->d_inode; |
ccd979bd | 2506 | |
ef6b689b TM |
2507 | mlog(0, "(0x%p, %u, '%.*s')\n", filp, |
2508 | (unsigned int)nr_segs, | |
2509 | filp->f_path.dentry->d_name.len, | |
2510 | filp->f_path.dentry->d_name.name); | |
ccd979bd MF |
2511 | |
2512 | if (!inode) { | |
2513 | ret = -EINVAL; | |
2514 | mlog_errno(ret); | |
2515 | goto bail; | |
2516 | } | |
2517 | ||
39c99f12 TY |
2518 | ocfs2_iocb_clear_sem_locked(iocb); |
2519 | ||
2bd63216 | 2520 | /* |
ccd979bd MF |
2521 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
2522 | * need locks to protect pending reads from racing with truncate. | |
2523 | */ | |
2524 | if (filp->f_flags & O_DIRECT) { | |
2525 | down_read(&inode->i_alloc_sem); | |
2526 | have_alloc_sem = 1; | |
39c99f12 | 2527 | ocfs2_iocb_set_sem_locked(iocb); |
ccd979bd MF |
2528 | |
2529 | ret = ocfs2_rw_lock(inode, 0); | |
2530 | if (ret < 0) { | |
2531 | mlog_errno(ret); | |
2532 | goto bail; | |
2533 | } | |
2534 | rw_level = 0; | |
2535 | /* communicate with ocfs2_dio_end_io */ | |
7cdfc3a1 | 2536 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd MF |
2537 | } |
2538 | ||
c4374f8a MF |
2539 | /* |
2540 | * We're fine letting folks race truncates and extending | |
2541 | * writes with read across the cluster, just like they can | |
2542 | * locally. Hence no rw_lock during read. | |
2bd63216 | 2543 | * |
c4374f8a MF |
2544 | * Take and drop the meta data lock to update inode fields |
2545 | * like i_size. This allows the checks down below | |
2bd63216 | 2546 | * generic_file_aio_read() a chance of actually working. |
c4374f8a | 2547 | */ |
e63aecb6 | 2548 | ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
c4374f8a MF |
2549 | if (ret < 0) { |
2550 | mlog_errno(ret); | |
2551 | goto bail; | |
2552 | } | |
e63aecb6 | 2553 | ocfs2_inode_unlock(inode, lock_level); |
c4374f8a | 2554 | |
027445c3 | 2555 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
ccd979bd | 2556 | if (ret == -EINVAL) |
56753bd3 | 2557 | mlog(0, "generic_file_aio_read returned -EINVAL\n"); |
ccd979bd MF |
2558 | |
2559 | /* buffered aio wouldn't have proper lock coverage today */ | |
2560 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); | |
2561 | ||
2562 | /* see ocfs2_file_aio_write */ | |
2563 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { | |
2564 | rw_level = -1; | |
2565 | have_alloc_sem = 0; | |
2566 | } | |
2567 | ||
2568 | bail: | |
39c99f12 | 2569 | if (have_alloc_sem) { |
ccd979bd | 2570 | up_read(&inode->i_alloc_sem); |
39c99f12 TY |
2571 | ocfs2_iocb_clear_sem_locked(iocb); |
2572 | } | |
2bd63216 | 2573 | if (rw_level != -1) |
ccd979bd | 2574 | ocfs2_rw_unlock(inode, rw_level); |
ccd979bd MF |
2575 | |
2576 | return ret; | |
2577 | } | |
2578 | ||
92e1d5be | 2579 | const struct inode_operations ocfs2_file_iops = { |
ccd979bd MF |
2580 | .setattr = ocfs2_setattr, |
2581 | .getattr = ocfs2_getattr, | |
d38eb8db | 2582 | .permission = ocfs2_permission, |
cf1d6c76 TY |
2583 | .setxattr = generic_setxattr, |
2584 | .getxattr = generic_getxattr, | |
2585 | .listxattr = ocfs2_listxattr, | |
2586 | .removexattr = generic_removexattr, | |
00dc417f | 2587 | .fiemap = ocfs2_fiemap, |
ccd979bd MF |
2588 | }; |
2589 | ||
92e1d5be | 2590 | const struct inode_operations ocfs2_special_file_iops = { |
ccd979bd MF |
2591 | .setattr = ocfs2_setattr, |
2592 | .getattr = ocfs2_getattr, | |
d38eb8db | 2593 | .permission = ocfs2_permission, |
ccd979bd MF |
2594 | }; |
2595 | ||
53da4939 MF |
2596 | /* |
2597 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with | |
2598 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! | |
2599 | */ | |
4b6f5d20 | 2600 | const struct file_operations ocfs2_fops = { |
32c3c0e2 | 2601 | .llseek = generic_file_llseek, |
ccd979bd MF |
2602 | .read = do_sync_read, |
2603 | .write = do_sync_write, | |
ccd979bd MF |
2604 | .mmap = ocfs2_mmap, |
2605 | .fsync = ocfs2_sync_file, | |
2606 | .release = ocfs2_file_release, | |
2607 | .open = ocfs2_file_open, | |
2608 | .aio_read = ocfs2_file_aio_read, | |
2609 | .aio_write = ocfs2_file_aio_write, | |
c9ec1488 | 2610 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2611 | #ifdef CONFIG_COMPAT |
2612 | .compat_ioctl = ocfs2_compat_ioctl, | |
2613 | #endif | |
53da4939 | 2614 | .lock = ocfs2_lock, |
53fc622b | 2615 | .flock = ocfs2_flock, |
8659ac25 TY |
2616 | .splice_read = ocfs2_file_splice_read, |
2617 | .splice_write = ocfs2_file_splice_write, | |
2fe17c10 | 2618 | .fallocate = ocfs2_fallocate, |
ccd979bd MF |
2619 | }; |
2620 | ||
4b6f5d20 | 2621 | const struct file_operations ocfs2_dops = { |
32c3c0e2 | 2622 | .llseek = generic_file_llseek, |
ccd979bd MF |
2623 | .read = generic_read_dir, |
2624 | .readdir = ocfs2_readdir, | |
2625 | .fsync = ocfs2_sync_file, | |
53fc622b MF |
2626 | .release = ocfs2_dir_release, |
2627 | .open = ocfs2_dir_open, | |
c9ec1488 | 2628 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2629 | #ifdef CONFIG_COMPAT |
2630 | .compat_ioctl = ocfs2_compat_ioctl, | |
53da4939 MF |
2631 | #endif |
2632 | .lock = ocfs2_lock, | |
2633 | .flock = ocfs2_flock, | |
2634 | }; | |
2635 | ||
2636 | /* | |
2637 | * POSIX-lockless variants of our file_operations. | |
2638 | * | |
2639 | * These will be used if the underlying cluster stack does not support | |
2640 | * posix file locking, if the user passes the "localflocks" mount | |
2641 | * option, or if we have a local-only fs. | |
2642 | * | |
2643 | * ocfs2_flock is in here because all stacks handle UNIX file locks, | |
2644 | * so we still want it in the case of no stack support for | |
2645 | * plocks. Internally, it will do the right thing when asked to ignore | |
2646 | * the cluster. | |
2647 | */ | |
2648 | const struct file_operations ocfs2_fops_no_plocks = { | |
2649 | .llseek = generic_file_llseek, | |
2650 | .read = do_sync_read, | |
2651 | .write = do_sync_write, | |
2652 | .mmap = ocfs2_mmap, | |
2653 | .fsync = ocfs2_sync_file, | |
2654 | .release = ocfs2_file_release, | |
2655 | .open = ocfs2_file_open, | |
2656 | .aio_read = ocfs2_file_aio_read, | |
2657 | .aio_write = ocfs2_file_aio_write, | |
2658 | .unlocked_ioctl = ocfs2_ioctl, | |
2659 | #ifdef CONFIG_COMPAT | |
2660 | .compat_ioctl = ocfs2_compat_ioctl, | |
2661 | #endif | |
2662 | .flock = ocfs2_flock, | |
2663 | .splice_read = ocfs2_file_splice_read, | |
2664 | .splice_write = ocfs2_file_splice_write, | |
2665 | }; | |
2666 | ||
2667 | const struct file_operations ocfs2_dops_no_plocks = { | |
2668 | .llseek = generic_file_llseek, | |
2669 | .read = generic_read_dir, | |
2670 | .readdir = ocfs2_readdir, | |
2671 | .fsync = ocfs2_sync_file, | |
2672 | .release = ocfs2_dir_release, | |
2673 | .open = ocfs2_dir_open, | |
2674 | .unlocked_ioctl = ocfs2_ioctl, | |
2675 | #ifdef CONFIG_COMPAT | |
2676 | .compat_ioctl = ocfs2_compat_ioctl, | |
586d232b | 2677 | #endif |
53fc622b | 2678 | .flock = ocfs2_flock, |
ccd979bd | 2679 | }; |