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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> |
ccd979bd MF |
39 | |
40 | #define MLOG_MASK_PREFIX ML_INODE | |
41 | #include <cluster/masklog.h> | |
42 | ||
43 | #include "ocfs2.h" | |
44 | ||
45 | #include "alloc.h" | |
46 | #include "aops.h" | |
47 | #include "dir.h" | |
48 | #include "dlmglue.h" | |
49 | #include "extent_map.h" | |
50 | #include "file.h" | |
51 | #include "sysfile.h" | |
52 | #include "inode.h" | |
ca4d147e | 53 | #include "ioctl.h" |
ccd979bd | 54 | #include "journal.h" |
53fc622b | 55 | #include "locks.h" |
ccd979bd MF |
56 | #include "mmap.h" |
57 | #include "suballoc.h" | |
58 | #include "super.h" | |
cf1d6c76 | 59 | #include "xattr.h" |
23fc2702 | 60 | #include "acl.h" |
a90714c1 | 61 | #include "quota.h" |
293b2f70 | 62 | #include "refcounttree.h" |
ccd979bd MF |
63 | |
64 | #include "buffer_head_io.h" | |
65 | ||
66 | static int ocfs2_sync_inode(struct inode *inode) | |
67 | { | |
68 | filemap_fdatawrite(inode->i_mapping); | |
69 | return sync_mapping_buffers(inode->i_mapping); | |
70 | } | |
71 | ||
53fc622b MF |
72 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
73 | { | |
74 | struct ocfs2_file_private *fp; | |
75 | ||
76 | fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL); | |
77 | if (!fp) | |
78 | return -ENOMEM; | |
79 | ||
80 | fp->fp_file = file; | |
81 | mutex_init(&fp->fp_mutex); | |
82 | ocfs2_file_lock_res_init(&fp->fp_flock, fp); | |
83 | file->private_data = fp; | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
88 | static void ocfs2_free_file_private(struct inode *inode, struct file *file) | |
89 | { | |
90 | struct ocfs2_file_private *fp = file->private_data; | |
91 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
92 | ||
93 | if (fp) { | |
94 | ocfs2_simple_drop_lockres(osb, &fp->fp_flock); | |
95 | ocfs2_lock_res_free(&fp->fp_flock); | |
96 | kfree(fp); | |
97 | file->private_data = NULL; | |
98 | } | |
99 | } | |
100 | ||
ccd979bd MF |
101 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
102 | { | |
103 | int status; | |
104 | int mode = file->f_flags; | |
105 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
106 | ||
107 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, | |
d28c9174 | 108 | file->f_path.dentry->d_name.len, file->f_path.dentry->d_name.name); |
ccd979bd | 109 | |
907f4554 | 110 | if (file->f_mode & FMODE_WRITE) |
871a2931 | 111 | dquot_initialize(inode); |
907f4554 | 112 | |
ccd979bd MF |
113 | spin_lock(&oi->ip_lock); |
114 | ||
115 | /* Check that the inode hasn't been wiped from disk by another | |
116 | * node. If it hasn't then we're safe as long as we hold the | |
117 | * spin lock until our increment of open count. */ | |
118 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { | |
119 | spin_unlock(&oi->ip_lock); | |
120 | ||
121 | status = -ENOENT; | |
122 | goto leave; | |
123 | } | |
124 | ||
125 | if (mode & O_DIRECT) | |
126 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; | |
127 | ||
128 | oi->ip_open_count++; | |
129 | spin_unlock(&oi->ip_lock); | |
53fc622b MF |
130 | |
131 | status = ocfs2_init_file_private(inode, file); | |
132 | if (status) { | |
133 | /* | |
134 | * We want to set open count back if we're failing the | |
135 | * open. | |
136 | */ | |
137 | spin_lock(&oi->ip_lock); | |
138 | oi->ip_open_count--; | |
139 | spin_unlock(&oi->ip_lock); | |
140 | } | |
141 | ||
ccd979bd MF |
142 | leave: |
143 | mlog_exit(status); | |
144 | return status; | |
145 | } | |
146 | ||
147 | static int ocfs2_file_release(struct inode *inode, struct file *file) | |
148 | { | |
149 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
150 | ||
151 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, | |
d28c9174 JS |
152 | file->f_path.dentry->d_name.len, |
153 | file->f_path.dentry->d_name.name); | |
ccd979bd MF |
154 | |
155 | spin_lock(&oi->ip_lock); | |
156 | if (!--oi->ip_open_count) | |
157 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; | |
158 | spin_unlock(&oi->ip_lock); | |
159 | ||
53fc622b MF |
160 | ocfs2_free_file_private(inode, file); |
161 | ||
ccd979bd MF |
162 | mlog_exit(0); |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
53fc622b MF |
167 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
168 | { | |
169 | return ocfs2_init_file_private(inode, file); | |
170 | } | |
171 | ||
172 | static int ocfs2_dir_release(struct inode *inode, struct file *file) | |
173 | { | |
174 | ocfs2_free_file_private(inode, file); | |
175 | return 0; | |
176 | } | |
177 | ||
ccd979bd MF |
178 | static int ocfs2_sync_file(struct file *file, |
179 | struct dentry *dentry, | |
180 | int datasync) | |
181 | { | |
182 | int err = 0; | |
183 | journal_t *journal; | |
184 | struct inode *inode = dentry->d_inode; | |
185 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
186 | ||
187 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync, | |
188 | dentry->d_name.len, dentry->d_name.name); | |
189 | ||
190 | err = ocfs2_sync_inode(dentry->d_inode); | |
191 | if (err) | |
192 | goto bail; | |
193 | ||
e04cc15f HH |
194 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) |
195 | goto bail; | |
196 | ||
ccd979bd | 197 | journal = osb->journal->j_journal; |
2b4e30fb | 198 | err = jbd2_journal_force_commit(journal); |
ccd979bd MF |
199 | |
200 | bail: | |
201 | mlog_exit(err); | |
202 | ||
203 | return (err < 0) ? -EIO : 0; | |
204 | } | |
205 | ||
7f1a37e3 TY |
206 | int ocfs2_should_update_atime(struct inode *inode, |
207 | struct vfsmount *vfsmnt) | |
208 | { | |
209 | struct timespec now; | |
210 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
211 | ||
212 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
213 | return 0; | |
214 | ||
215 | if ((inode->i_flags & S_NOATIME) || | |
216 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
217 | return 0; | |
218 | ||
6c2aad05 MF |
219 | /* |
220 | * We can be called with no vfsmnt structure - NFSD will | |
221 | * sometimes do this. | |
222 | * | |
223 | * Note that our action here is different than touch_atime() - | |
224 | * if we can't tell whether this is a noatime mount, then we | |
225 | * don't know whether to trust the value of s_atime_quantum. | |
226 | */ | |
227 | if (vfsmnt == NULL) | |
228 | return 0; | |
229 | ||
7f1a37e3 TY |
230 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
231 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
232 | return 0; | |
233 | ||
7e913c53 MF |
234 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
235 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || | |
236 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) | |
237 | return 1; | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
7f1a37e3 TY |
242 | now = CURRENT_TIME; |
243 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) | |
244 | return 0; | |
245 | else | |
246 | return 1; | |
247 | } | |
248 | ||
249 | int ocfs2_update_inode_atime(struct inode *inode, | |
250 | struct buffer_head *bh) | |
251 | { | |
252 | int ret; | |
253 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
254 | handle_t *handle; | |
c11e9faf | 255 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
7f1a37e3 TY |
256 | |
257 | mlog_entry_void(); | |
258 | ||
259 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
260 | if (IS_ERR(handle)) { |
261 | ret = PTR_ERR(handle); | |
7f1a37e3 TY |
262 | mlog_errno(ret); |
263 | goto out; | |
264 | } | |
265 | ||
0cf2f763 | 266 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 267 | OCFS2_JOURNAL_ACCESS_WRITE); |
c11e9faf MF |
268 | if (ret) { |
269 | mlog_errno(ret); | |
270 | goto out_commit; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Don't use ocfs2_mark_inode_dirty() here as we don't always | |
275 | * have i_mutex to guard against concurrent changes to other | |
276 | * inode fields. | |
277 | */ | |
7f1a37e3 | 278 | inode->i_atime = CURRENT_TIME; |
c11e9faf MF |
279 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
280 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); | |
281 | ||
282 | ret = ocfs2_journal_dirty(handle, bh); | |
7f1a37e3 TY |
283 | if (ret < 0) |
284 | mlog_errno(ret); | |
285 | ||
c11e9faf | 286 | out_commit: |
7f1a37e3 TY |
287 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
288 | out: | |
289 | mlog_exit(ret); | |
290 | return ret; | |
291 | } | |
292 | ||
6cb129f5 AB |
293 | static int ocfs2_set_inode_size(handle_t *handle, |
294 | struct inode *inode, | |
295 | struct buffer_head *fe_bh, | |
296 | u64 new_i_size) | |
ccd979bd MF |
297 | { |
298 | int status; | |
299 | ||
300 | mlog_entry_void(); | |
301 | i_size_write(inode, new_i_size); | |
8110b073 | 302 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
303 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
304 | ||
305 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
306 | if (status < 0) { | |
307 | mlog_errno(status); | |
308 | goto bail; | |
309 | } | |
310 | ||
311 | bail: | |
312 | mlog_exit(status); | |
313 | return status; | |
314 | } | |
315 | ||
9e33d69f JK |
316 | int ocfs2_simple_size_update(struct inode *inode, |
317 | struct buffer_head *di_bh, | |
318 | u64 new_i_size) | |
ccd979bd MF |
319 | { |
320 | int ret; | |
321 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 322 | handle_t *handle = NULL; |
ccd979bd | 323 | |
65eff9cc | 324 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
325 | if (IS_ERR(handle)) { |
326 | ret = PTR_ERR(handle); | |
ccd979bd MF |
327 | mlog_errno(ret); |
328 | goto out; | |
329 | } | |
330 | ||
331 | ret = ocfs2_set_inode_size(handle, inode, di_bh, | |
332 | new_i_size); | |
333 | if (ret < 0) | |
334 | mlog_errno(ret); | |
335 | ||
02dc1af4 | 336 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
337 | out: |
338 | return ret; | |
339 | } | |
340 | ||
37f8a2bf TM |
341 | static int ocfs2_cow_file_pos(struct inode *inode, |
342 | struct buffer_head *fe_bh, | |
343 | u64 offset) | |
344 | { | |
345 | int status; | |
346 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
347 | unsigned int num_clusters = 0; | |
348 | unsigned int ext_flags = 0; | |
349 | ||
350 | /* | |
351 | * If the new offset is aligned to the range of the cluster, there is | |
352 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to | |
353 | * CoW either. | |
354 | */ | |
355 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) | |
356 | return 0; | |
357 | ||
358 | status = ocfs2_get_clusters(inode, cpos, &phys, | |
359 | &num_clusters, &ext_flags); | |
360 | if (status) { | |
361 | mlog_errno(status); | |
362 | goto out; | |
363 | } | |
364 | ||
365 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
366 | goto out; | |
367 | ||
368 | return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1); | |
369 | ||
370 | out: | |
371 | return status; | |
372 | } | |
373 | ||
ccd979bd MF |
374 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
375 | struct inode *inode, | |
376 | struct buffer_head *fe_bh, | |
377 | u64 new_i_size) | |
378 | { | |
379 | int status; | |
1fabe148 | 380 | handle_t *handle; |
60b11392 | 381 | struct ocfs2_dinode *di; |
35edec1d | 382 | u64 cluster_bytes; |
ccd979bd MF |
383 | |
384 | mlog_entry_void(); | |
385 | ||
37f8a2bf TM |
386 | /* |
387 | * We need to CoW the cluster contains the offset if it is reflinked | |
388 | * since we will call ocfs2_zero_range_for_truncate later which will | |
389 | * write "0" from offset to the end of the cluster. | |
390 | */ | |
391 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); | |
392 | if (status) { | |
393 | mlog_errno(status); | |
394 | return status; | |
395 | } | |
396 | ||
ccd979bd MF |
397 | /* TODO: This needs to actually orphan the inode in this |
398 | * transaction. */ | |
399 | ||
65eff9cc | 400 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ccd979bd MF |
401 | if (IS_ERR(handle)) { |
402 | status = PTR_ERR(handle); | |
403 | mlog_errno(status); | |
404 | goto out; | |
405 | } | |
406 | ||
0cf2f763 | 407 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
13723d00 | 408 | OCFS2_JOURNAL_ACCESS_WRITE); |
60b11392 MF |
409 | if (status < 0) { |
410 | mlog_errno(status); | |
411 | goto out_commit; | |
412 | } | |
413 | ||
414 | /* | |
415 | * Do this before setting i_size. | |
416 | */ | |
35edec1d MF |
417 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
418 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, | |
419 | cluster_bytes); | |
60b11392 MF |
420 | if (status) { |
421 | mlog_errno(status); | |
422 | goto out_commit; | |
423 | } | |
424 | ||
425 | i_size_write(inode, new_i_size); | |
60b11392 MF |
426 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
427 | ||
428 | di = (struct ocfs2_dinode *) fe_bh->b_data; | |
429 | di->i_size = cpu_to_le64(new_i_size); | |
430 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); | |
431 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
432 | ||
433 | status = ocfs2_journal_dirty(handle, fe_bh); | |
ccd979bd MF |
434 | if (status < 0) |
435 | mlog_errno(status); | |
436 | ||
60b11392 | 437 | out_commit: |
02dc1af4 | 438 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 439 | out: |
60b11392 | 440 | |
ccd979bd MF |
441 | mlog_exit(status); |
442 | return status; | |
443 | } | |
444 | ||
445 | static int ocfs2_truncate_file(struct inode *inode, | |
446 | struct buffer_head *di_bh, | |
447 | u64 new_i_size) | |
448 | { | |
449 | int status = 0; | |
450 | struct ocfs2_dinode *fe = NULL; | |
451 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
452 | struct ocfs2_truncate_context *tc = NULL; | |
453 | ||
b0697053 MF |
454 | mlog_entry("(inode = %llu, new_i_size = %llu\n", |
455 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
456 | (unsigned long long)new_i_size); | |
ccd979bd | 457 | |
b657c95c JB |
458 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
459 | * already validated it */ | |
ccd979bd | 460 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
ccd979bd MF |
461 | |
462 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), | |
b0697053 MF |
463 | "Inode %llu, inode i_size = %lld != di " |
464 | "i_size = %llu, i_flags = 0x%x\n", | |
465 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ccd979bd | 466 | i_size_read(inode), |
b0697053 MF |
467 | (unsigned long long)le64_to_cpu(fe->i_size), |
468 | le32_to_cpu(fe->i_flags)); | |
ccd979bd MF |
469 | |
470 | if (new_i_size > le64_to_cpu(fe->i_size)) { | |
b0697053 MF |
471 | mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", |
472 | (unsigned long long)le64_to_cpu(fe->i_size), | |
473 | (unsigned long long)new_i_size); | |
ccd979bd MF |
474 | status = -EINVAL; |
475 | mlog_errno(status); | |
476 | goto bail; | |
477 | } | |
478 | ||
b0697053 MF |
479 | mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", |
480 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
481 | (unsigned long long)le64_to_cpu(fe->i_size), | |
482 | (unsigned long long)new_i_size); | |
ccd979bd MF |
483 | |
484 | /* lets handle the simple truncate cases before doing any more | |
485 | * cluster locking. */ | |
486 | if (new_i_size == le64_to_cpu(fe->i_size)) | |
487 | goto bail; | |
488 | ||
2e89b2e4 MF |
489 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
490 | ||
c934a92d MF |
491 | /* |
492 | * The inode lock forced other nodes to sync and drop their | |
493 | * pages, which (correctly) happens even if we have a truncate | |
494 | * without allocation change - ocfs2 cluster sizes can be much | |
495 | * greater than page size, so we have to truncate them | |
496 | * anyway. | |
497 | */ | |
2e89b2e4 MF |
498 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
499 | truncate_inode_pages(inode->i_mapping, new_i_size); | |
500 | ||
1afc32b9 MF |
501 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
502 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, | |
b1967d0e | 503 | i_size_read(inode), 1); |
1afc32b9 MF |
504 | if (status) |
505 | mlog_errno(status); | |
506 | ||
c934a92d | 507 | goto bail_unlock_sem; |
1afc32b9 MF |
508 | } |
509 | ||
ccd979bd MF |
510 | /* alright, we're going to need to do a full blown alloc size |
511 | * change. Orphan the inode so that recovery can complete the | |
512 | * truncate if necessary. This does the task of marking | |
513 | * i_size. */ | |
514 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); | |
515 | if (status < 0) { | |
516 | mlog_errno(status); | |
c934a92d | 517 | goto bail_unlock_sem; |
ccd979bd MF |
518 | } |
519 | ||
520 | status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc); | |
521 | if (status < 0) { | |
522 | mlog_errno(status); | |
c934a92d | 523 | goto bail_unlock_sem; |
ccd979bd MF |
524 | } |
525 | ||
526 | status = ocfs2_commit_truncate(osb, inode, di_bh, tc); | |
527 | if (status < 0) { | |
528 | mlog_errno(status); | |
c934a92d | 529 | goto bail_unlock_sem; |
ccd979bd MF |
530 | } |
531 | ||
532 | /* TODO: orphan dir cleanup here. */ | |
c934a92d | 533 | bail_unlock_sem: |
2e89b2e4 MF |
534 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
535 | ||
ccd979bd | 536 | bail: |
8b2c0dba TM |
537 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
538 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
ccd979bd MF |
539 | |
540 | mlog_exit(status); | |
541 | return status; | |
542 | } | |
543 | ||
544 | /* | |
0eb8d47e | 545 | * extend file allocation only here. |
ccd979bd MF |
546 | * we'll update all the disk stuff, and oip->alloc_size |
547 | * | |
548 | * expect stuff to be locked, a transaction started and enough data / | |
549 | * metadata reservations in the contexts. | |
550 | * | |
551 | * Will return -EAGAIN, and a reason if a restart is needed. | |
552 | * If passed in, *reason will always be set, even in error. | |
553 | */ | |
0eb8d47e TM |
554 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
555 | struct inode *inode, | |
556 | u32 *logical_offset, | |
557 | u32 clusters_to_add, | |
558 | int mark_unwritten, | |
559 | struct buffer_head *fe_bh, | |
560 | handle_t *handle, | |
561 | struct ocfs2_alloc_context *data_ac, | |
562 | struct ocfs2_alloc_context *meta_ac, | |
563 | enum ocfs2_alloc_restarted *reason_ret) | |
ccd979bd | 564 | { |
f99b9b7c JB |
565 | int ret; |
566 | struct ocfs2_extent_tree et; | |
ccd979bd | 567 | |
5e404e9e | 568 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
cbee7e1a JB |
569 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
570 | clusters_to_add, mark_unwritten, | |
571 | data_ac, meta_ac, reason_ret); | |
f99b9b7c JB |
572 | |
573 | return ret; | |
ccd979bd MF |
574 | } |
575 | ||
2ae99a60 MF |
576 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
577 | u32 clusters_to_add, int mark_unwritten) | |
ccd979bd MF |
578 | { |
579 | int status = 0; | |
580 | int restart_func = 0; | |
abf8b156 | 581 | int credits; |
2ae99a60 | 582 | u32 prev_clusters; |
ccd979bd MF |
583 | struct buffer_head *bh = NULL; |
584 | struct ocfs2_dinode *fe = NULL; | |
1fabe148 | 585 | handle_t *handle = NULL; |
ccd979bd MF |
586 | struct ocfs2_alloc_context *data_ac = NULL; |
587 | struct ocfs2_alloc_context *meta_ac = NULL; | |
588 | enum ocfs2_alloc_restarted why; | |
589 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 590 | struct ocfs2_extent_tree et; |
a90714c1 | 591 | int did_quota = 0; |
ccd979bd MF |
592 | |
593 | mlog_entry("(clusters_to_add = %u)\n", clusters_to_add); | |
594 | ||
dcd0538f MF |
595 | /* |
596 | * This function only exists for file systems which don't | |
597 | * support holes. | |
598 | */ | |
2ae99a60 | 599 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
dcd0538f | 600 | |
b657c95c | 601 | status = ocfs2_read_inode_block(inode, &bh); |
ccd979bd MF |
602 | if (status < 0) { |
603 | mlog_errno(status); | |
604 | goto leave; | |
605 | } | |
ccd979bd | 606 | fe = (struct ocfs2_dinode *) bh->b_data; |
ccd979bd MF |
607 | |
608 | restart_all: | |
609 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); | |
610 | ||
e7d4cb6b TM |
611 | mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, " |
612 | "clusters_to_add = %u\n", | |
613 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
614 | (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters), | |
615 | clusters_to_add); | |
5e404e9e | 616 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
f99b9b7c JB |
617 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
618 | &data_ac, &meta_ac); | |
9517bac6 MF |
619 | if (status) { |
620 | mlog_errno(status); | |
621 | goto leave; | |
622 | } | |
623 | ||
811f933d TM |
624 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list, |
625 | clusters_to_add); | |
65eff9cc | 626 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
627 | if (IS_ERR(handle)) { |
628 | status = PTR_ERR(handle); | |
629 | handle = NULL; | |
630 | mlog_errno(status); | |
631 | goto leave; | |
632 | } | |
633 | ||
634 | restarted_transaction: | |
5dd4056d CH |
635 | status = dquot_alloc_space_nodirty(inode, |
636 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); | |
637 | if (status) | |
a90714c1 | 638 | goto leave; |
a90714c1 JK |
639 | did_quota = 1; |
640 | ||
ccd979bd MF |
641 | /* reserve a write to the file entry early on - that we if we |
642 | * run out of credits in the allocation path, we can still | |
643 | * update i_size. */ | |
0cf2f763 | 644 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 645 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
646 | if (status < 0) { |
647 | mlog_errno(status); | |
648 | goto leave; | |
649 | } | |
650 | ||
651 | prev_clusters = OCFS2_I(inode)->ip_clusters; | |
652 | ||
0eb8d47e TM |
653 | status = ocfs2_add_inode_data(osb, |
654 | inode, | |
655 | &logical_start, | |
656 | clusters_to_add, | |
657 | mark_unwritten, | |
658 | bh, | |
659 | handle, | |
660 | data_ac, | |
661 | meta_ac, | |
662 | &why); | |
ccd979bd MF |
663 | if ((status < 0) && (status != -EAGAIN)) { |
664 | if (status != -ENOSPC) | |
665 | mlog_errno(status); | |
666 | goto leave; | |
667 | } | |
668 | ||
669 | status = ocfs2_journal_dirty(handle, bh); | |
670 | if (status < 0) { | |
671 | mlog_errno(status); | |
672 | goto leave; | |
673 | } | |
674 | ||
675 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
676 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); | |
677 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
a90714c1 | 678 | /* Release unused quota reservation */ |
5dd4056d | 679 | dquot_free_space(inode, |
a90714c1 JK |
680 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
681 | did_quota = 0; | |
ccd979bd MF |
682 | |
683 | if (why != RESTART_NONE && clusters_to_add) { | |
684 | if (why == RESTART_META) { | |
685 | mlog(0, "restarting function.\n"); | |
686 | restart_func = 1; | |
687 | } else { | |
688 | BUG_ON(why != RESTART_TRANS); | |
689 | ||
690 | mlog(0, "restarting transaction.\n"); | |
691 | /* TODO: This can be more intelligent. */ | |
692 | credits = ocfs2_calc_extend_credits(osb->sb, | |
811f933d | 693 | &fe->id2.i_list, |
ccd979bd | 694 | clusters_to_add); |
1fabe148 | 695 | status = ocfs2_extend_trans(handle, credits); |
ccd979bd MF |
696 | if (status < 0) { |
697 | /* handle still has to be committed at | |
698 | * this point. */ | |
699 | status = -ENOMEM; | |
700 | mlog_errno(status); | |
701 | goto leave; | |
702 | } | |
703 | goto restarted_transaction; | |
704 | } | |
705 | } | |
706 | ||
b0697053 | 707 | mlog(0, "fe: i_clusters = %u, i_size=%llu\n", |
1ca1a111 MF |
708 | le32_to_cpu(fe->i_clusters), |
709 | (unsigned long long)le64_to_cpu(fe->i_size)); | |
ccd979bd | 710 | mlog(0, "inode: ip_clusters=%u, i_size=%lld\n", |
634bf74d | 711 | OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode)); |
ccd979bd MF |
712 | |
713 | leave: | |
a90714c1 | 714 | if (status < 0 && did_quota) |
5dd4056d | 715 | dquot_free_space(inode, |
a90714c1 | 716 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
ccd979bd | 717 | if (handle) { |
02dc1af4 | 718 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
719 | handle = NULL; |
720 | } | |
721 | if (data_ac) { | |
722 | ocfs2_free_alloc_context(data_ac); | |
723 | data_ac = NULL; | |
724 | } | |
725 | if (meta_ac) { | |
726 | ocfs2_free_alloc_context(meta_ac); | |
727 | meta_ac = NULL; | |
728 | } | |
729 | if ((!status) && restart_func) { | |
730 | restart_func = 0; | |
731 | goto restart_all; | |
732 | } | |
a81cb88b MF |
733 | brelse(bh); |
734 | bh = NULL; | |
ccd979bd MF |
735 | |
736 | mlog_exit(status); | |
737 | return status; | |
738 | } | |
739 | ||
740 | /* Some parts of this taken from generic_cont_expand, which turned out | |
741 | * to be too fragile to do exactly what we need without us having to | |
4e02ed4b | 742 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
ccd979bd MF |
743 | static int ocfs2_write_zero_page(struct inode *inode, |
744 | u64 size) | |
745 | { | |
746 | struct address_space *mapping = inode->i_mapping; | |
747 | struct page *page; | |
748 | unsigned long index; | |
749 | unsigned int offset; | |
1fabe148 | 750 | handle_t *handle = NULL; |
ccd979bd MF |
751 | int ret; |
752 | ||
753 | offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */ | |
2bd63216 | 754 | /* ugh. in prepare/commit_write, if from==to==start of block, we |
ccd979bd MF |
755 | ** skip the prepare. make sure we never send an offset for the start |
756 | ** of a block | |
757 | */ | |
758 | if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) { | |
759 | offset++; | |
760 | } | |
761 | index = size >> PAGE_CACHE_SHIFT; | |
762 | ||
763 | page = grab_cache_page(mapping, index); | |
764 | if (!page) { | |
765 | ret = -ENOMEM; | |
766 | mlog_errno(ret); | |
767 | goto out; | |
768 | } | |
769 | ||
53013cba | 770 | ret = ocfs2_prepare_write_nolock(inode, page, offset, offset); |
ccd979bd MF |
771 | if (ret < 0) { |
772 | mlog_errno(ret); | |
773 | goto out_unlock; | |
774 | } | |
775 | ||
776 | if (ocfs2_should_order_data(inode)) { | |
777 | handle = ocfs2_start_walk_page_trans(inode, page, offset, | |
778 | offset); | |
779 | if (IS_ERR(handle)) { | |
780 | ret = PTR_ERR(handle); | |
781 | handle = NULL; | |
782 | goto out_unlock; | |
783 | } | |
784 | } | |
785 | ||
786 | /* must not update i_size! */ | |
787 | ret = block_commit_write(page, offset, offset); | |
788 | if (ret < 0) | |
789 | mlog_errno(ret); | |
790 | else | |
791 | ret = 0; | |
792 | ||
793 | if (handle) | |
02dc1af4 | 794 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
ccd979bd MF |
795 | out_unlock: |
796 | unlock_page(page); | |
797 | page_cache_release(page); | |
798 | out: | |
799 | return ret; | |
800 | } | |
801 | ||
802 | static int ocfs2_zero_extend(struct inode *inode, | |
803 | u64 zero_to_size) | |
804 | { | |
805 | int ret = 0; | |
806 | u64 start_off; | |
807 | struct super_block *sb = inode->i_sb; | |
808 | ||
809 | start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); | |
810 | while (start_off < zero_to_size) { | |
811 | ret = ocfs2_write_zero_page(inode, start_off); | |
812 | if (ret < 0) { | |
813 | mlog_errno(ret); | |
814 | goto out; | |
815 | } | |
816 | ||
817 | start_off += sb->s_blocksize; | |
e2057c5a MF |
818 | |
819 | /* | |
820 | * Very large extends have the potential to lock up | |
821 | * the cpu for extended periods of time. | |
822 | */ | |
823 | cond_resched(); | |
ccd979bd MF |
824 | } |
825 | ||
826 | out: | |
827 | return ret; | |
828 | } | |
829 | ||
65ed39d6 MF |
830 | int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to) |
831 | { | |
832 | int ret; | |
833 | u32 clusters_to_add; | |
834 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
835 | ||
836 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); | |
837 | if (clusters_to_add < oi->ip_clusters) | |
838 | clusters_to_add = 0; | |
839 | else | |
840 | clusters_to_add -= oi->ip_clusters; | |
841 | ||
842 | if (clusters_to_add) { | |
843 | ret = __ocfs2_extend_allocation(inode, oi->ip_clusters, | |
844 | clusters_to_add, 0); | |
845 | if (ret) { | |
846 | mlog_errno(ret); | |
847 | goto out; | |
848 | } | |
849 | } | |
850 | ||
851 | /* | |
852 | * Call this even if we don't add any clusters to the tree. We | |
853 | * still need to zero the area between the old i_size and the | |
854 | * new i_size. | |
855 | */ | |
856 | ret = ocfs2_zero_extend(inode, zero_to); | |
857 | if (ret < 0) | |
858 | mlog_errno(ret); | |
859 | ||
860 | out: | |
861 | return ret; | |
862 | } | |
863 | ||
ccd979bd MF |
864 | static int ocfs2_extend_file(struct inode *inode, |
865 | struct buffer_head *di_bh, | |
65ed39d6 | 866 | u64 new_i_size) |
ccd979bd | 867 | { |
c934a92d | 868 | int ret = 0; |
1afc32b9 | 869 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
ccd979bd | 870 | |
65ed39d6 | 871 | BUG_ON(!di_bh); |
53013cba | 872 | |
ccd979bd MF |
873 | /* setattr sometimes calls us like this. */ |
874 | if (new_i_size == 0) | |
875 | goto out; | |
876 | ||
877 | if (i_size_read(inode) == new_i_size) | |
878 | goto out; | |
879 | BUG_ON(new_i_size < i_size_read(inode)); | |
880 | ||
1afc32b9 MF |
881 | /* |
882 | * Fall through for converting inline data, even if the fs | |
883 | * supports sparse files. | |
884 | * | |
885 | * The check for inline data here is legal - nobody can add | |
886 | * the feature since we have i_mutex. We must check it again | |
887 | * after acquiring ip_alloc_sem though, as paths like mmap | |
888 | * might have raced us to converting the inode to extents. | |
889 | */ | |
890 | if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) | |
891 | && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) | |
3a0782d0 | 892 | goto out_update_size; |
ccd979bd | 893 | |
0effef77 | 894 | /* |
65ed39d6 MF |
895 | * The alloc sem blocks people in read/write from reading our |
896 | * allocation until we're done changing it. We depend on | |
897 | * i_mutex to block other extend/truncate calls while we're | |
898 | * here. | |
0effef77 | 899 | */ |
1afc32b9 MF |
900 | down_write(&oi->ip_alloc_sem); |
901 | ||
902 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
903 | /* | |
904 | * We can optimize small extends by keeping the inodes | |
905 | * inline data. | |
906 | */ | |
907 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { | |
908 | up_write(&oi->ip_alloc_sem); | |
909 | goto out_update_size; | |
910 | } | |
911 | ||
912 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
913 | if (ret) { | |
914 | up_write(&oi->ip_alloc_sem); | |
915 | ||
916 | mlog_errno(ret); | |
c934a92d | 917 | goto out; |
1afc32b9 MF |
918 | } |
919 | } | |
920 | ||
921 | if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) | |
922 | ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size); | |
923 | ||
924 | up_write(&oi->ip_alloc_sem); | |
65ed39d6 | 925 | |
0effef77 MF |
926 | if (ret < 0) { |
927 | mlog_errno(ret); | |
c934a92d | 928 | goto out; |
53013cba MF |
929 | } |
930 | ||
3a0782d0 | 931 | out_update_size: |
65ed39d6 MF |
932 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
933 | if (ret < 0) | |
934 | mlog_errno(ret); | |
ccd979bd MF |
935 | |
936 | out: | |
937 | return ret; | |
938 | } | |
939 | ||
940 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
941 | { | |
942 | int status = 0, size_change; | |
943 | struct inode *inode = dentry->d_inode; | |
944 | struct super_block *sb = inode->i_sb; | |
945 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
946 | struct buffer_head *bh = NULL; | |
1fabe148 | 947 | handle_t *handle = NULL; |
65bac575 JK |
948 | int qtype; |
949 | struct dquot *transfer_from[MAXQUOTAS] = { }; | |
950 | struct dquot *transfer_to[MAXQUOTAS] = { }; | |
ccd979bd MF |
951 | |
952 | mlog_entry("(0x%p, '%.*s')\n", dentry, | |
953 | dentry->d_name.len, dentry->d_name.name); | |
954 | ||
bc535809 SM |
955 | /* ensuring we don't even attempt to truncate a symlink */ |
956 | if (S_ISLNK(inode->i_mode)) | |
957 | attr->ia_valid &= ~ATTR_SIZE; | |
958 | ||
ccd979bd MF |
959 | if (attr->ia_valid & ATTR_MODE) |
960 | mlog(0, "mode change: %d\n", attr->ia_mode); | |
961 | if (attr->ia_valid & ATTR_UID) | |
962 | mlog(0, "uid change: %d\n", attr->ia_uid); | |
963 | if (attr->ia_valid & ATTR_GID) | |
964 | mlog(0, "gid change: %d\n", attr->ia_gid); | |
965 | if (attr->ia_valid & ATTR_SIZE) | |
966 | mlog(0, "size change...\n"); | |
967 | if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME)) | |
968 | mlog(0, "time change...\n"); | |
969 | ||
970 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ | |
971 | | ATTR_GID | ATTR_UID | ATTR_MODE) | |
972 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) { | |
973 | mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid); | |
974 | return 0; | |
975 | } | |
976 | ||
977 | status = inode_change_ok(inode, attr); | |
978 | if (status) | |
979 | return status; | |
980 | ||
981 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; | |
982 | if (size_change) { | |
871a2931 | 983 | dquot_initialize(inode); |
907f4554 | 984 | |
ccd979bd MF |
985 | status = ocfs2_rw_lock(inode, 1); |
986 | if (status < 0) { | |
987 | mlog_errno(status); | |
988 | goto bail; | |
989 | } | |
990 | } | |
991 | ||
e63aecb6 | 992 | status = ocfs2_inode_lock(inode, &bh, 1); |
ccd979bd MF |
993 | if (status < 0) { |
994 | if (status != -ENOENT) | |
995 | mlog_errno(status); | |
996 | goto bail_unlock_rw; | |
997 | } | |
998 | ||
999 | if (size_change && attr->ia_size != i_size_read(inode)) { | |
5051f768 WW |
1000 | status = inode_newsize_ok(inode, attr->ia_size); |
1001 | if (status) | |
ce76fd30 | 1002 | goto bail_unlock; |
ce76fd30 | 1003 | |
2b4e30fb JB |
1004 | if (i_size_read(inode) > attr->ia_size) { |
1005 | if (ocfs2_should_order_data(inode)) { | |
1006 | status = ocfs2_begin_ordered_truncate(inode, | |
1007 | attr->ia_size); | |
1008 | if (status) | |
1009 | goto bail_unlock; | |
1010 | } | |
ccd979bd | 1011 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
2b4e30fb | 1012 | } else |
65ed39d6 | 1013 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
ccd979bd MF |
1014 | if (status < 0) { |
1015 | if (status != -ENOSPC) | |
1016 | mlog_errno(status); | |
1017 | status = -ENOSPC; | |
1018 | goto bail_unlock; | |
1019 | } | |
1020 | } | |
1021 | ||
a90714c1 JK |
1022 | if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || |
1023 | (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { | |
65bac575 JK |
1024 | /* |
1025 | * Gather pointers to quota structures so that allocation / | |
1026 | * freeing of quota structures happens here and not inside | |
b43fa828 | 1027 | * dquot_transfer() where we have problems with lock ordering |
65bac575 | 1028 | */ |
a90714c1 JK |
1029 | if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid |
1030 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1031 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { | |
65bac575 JK |
1032 | transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid, |
1033 | USRQUOTA); | |
1034 | transfer_from[USRQUOTA] = dqget(sb, inode->i_uid, | |
1035 | USRQUOTA); | |
1036 | if (!transfer_to[USRQUOTA] || !transfer_from[USRQUOTA]) { | |
1037 | status = -ESRCH; | |
a90714c1 | 1038 | goto bail_unlock; |
65bac575 | 1039 | } |
a90714c1 JK |
1040 | } |
1041 | if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid | |
1042 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1043 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { | |
65bac575 JK |
1044 | transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid, |
1045 | GRPQUOTA); | |
1046 | transfer_from[GRPQUOTA] = dqget(sb, inode->i_gid, | |
1047 | GRPQUOTA); | |
1048 | if (!transfer_to[GRPQUOTA] || !transfer_from[GRPQUOTA]) { | |
1049 | status = -ESRCH; | |
a90714c1 | 1050 | goto bail_unlock; |
65bac575 | 1051 | } |
a90714c1 | 1052 | } |
65bac575 JK |
1053 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
1054 | 2 * ocfs2_quota_trans_credits(sb)); | |
a90714c1 JK |
1055 | if (IS_ERR(handle)) { |
1056 | status = PTR_ERR(handle); | |
1057 | mlog_errno(status); | |
1058 | goto bail_unlock; | |
1059 | } | |
b43fa828 | 1060 | status = dquot_transfer(inode, attr); |
a90714c1 JK |
1061 | if (status < 0) |
1062 | goto bail_commit; | |
1063 | } else { | |
1064 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1065 | if (IS_ERR(handle)) { | |
1066 | status = PTR_ERR(handle); | |
1067 | mlog_errno(status); | |
1068 | goto bail_unlock; | |
1069 | } | |
ccd979bd MF |
1070 | } |
1071 | ||
7307de80 MF |
1072 | /* |
1073 | * This will intentionally not wind up calling vmtruncate(), | |
1074 | * since all the work for a size change has been done above. | |
1075 | * Otherwise, we could get into problems with truncate as | |
1076 | * ip_alloc_sem is used there to protect against i_size | |
1077 | * changes. | |
1078 | */ | |
ccd979bd MF |
1079 | status = inode_setattr(inode, attr); |
1080 | if (status < 0) { | |
1081 | mlog_errno(status); | |
1082 | goto bail_commit; | |
1083 | } | |
1084 | ||
1085 | status = ocfs2_mark_inode_dirty(handle, inode, bh); | |
1086 | if (status < 0) | |
1087 | mlog_errno(status); | |
1088 | ||
1089 | bail_commit: | |
02dc1af4 | 1090 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1091 | bail_unlock: |
e63aecb6 | 1092 | ocfs2_inode_unlock(inode, 1); |
ccd979bd MF |
1093 | bail_unlock_rw: |
1094 | if (size_change) | |
1095 | ocfs2_rw_unlock(inode, 1); | |
1096 | bail: | |
a81cb88b | 1097 | brelse(bh); |
ccd979bd | 1098 | |
65bac575 JK |
1099 | /* Release quota pointers in case we acquired them */ |
1100 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) { | |
1101 | dqput(transfer_to[qtype]); | |
1102 | dqput(transfer_from[qtype]); | |
1103 | } | |
1104 | ||
060bc66d TY |
1105 | if (!status && attr->ia_valid & ATTR_MODE) { |
1106 | status = ocfs2_acl_chmod(inode); | |
1107 | if (status < 0) | |
1108 | mlog_errno(status); | |
1109 | } | |
1110 | ||
ccd979bd MF |
1111 | mlog_exit(status); |
1112 | return status; | |
1113 | } | |
1114 | ||
1115 | int ocfs2_getattr(struct vfsmount *mnt, | |
1116 | struct dentry *dentry, | |
1117 | struct kstat *stat) | |
1118 | { | |
1119 | struct inode *inode = dentry->d_inode; | |
1120 | struct super_block *sb = dentry->d_inode->i_sb; | |
1121 | struct ocfs2_super *osb = sb->s_fs_info; | |
1122 | int err; | |
1123 | ||
1124 | mlog_entry_void(); | |
1125 | ||
1126 | err = ocfs2_inode_revalidate(dentry); | |
1127 | if (err) { | |
1128 | if (err != -ENOENT) | |
1129 | mlog_errno(err); | |
1130 | goto bail; | |
1131 | } | |
1132 | ||
1133 | generic_fillattr(inode, stat); | |
1134 | ||
1135 | /* We set the blksize from the cluster size for performance */ | |
1136 | stat->blksize = osb->s_clustersize; | |
1137 | ||
1138 | bail: | |
1139 | mlog_exit(err); | |
1140 | ||
1141 | return err; | |
1142 | } | |
1143 | ||
e6305c43 | 1144 | int ocfs2_permission(struct inode *inode, int mask) |
d38eb8db TY |
1145 | { |
1146 | int ret; | |
1147 | ||
1148 | mlog_entry_void(); | |
1149 | ||
e63aecb6 | 1150 | ret = ocfs2_inode_lock(inode, NULL, 0); |
d38eb8db | 1151 | if (ret) { |
a9f5f707 MF |
1152 | if (ret != -ENOENT) |
1153 | mlog_errno(ret); | |
d38eb8db TY |
1154 | goto out; |
1155 | } | |
1156 | ||
23fc2702 | 1157 | ret = generic_permission(inode, mask, ocfs2_check_acl); |
d38eb8db | 1158 | |
e63aecb6 | 1159 | ocfs2_inode_unlock(inode, 0); |
d38eb8db TY |
1160 | out: |
1161 | mlog_exit(ret); | |
1162 | return ret; | |
1163 | } | |
1164 | ||
b2580103 MF |
1165 | static int __ocfs2_write_remove_suid(struct inode *inode, |
1166 | struct buffer_head *bh) | |
ccd979bd MF |
1167 | { |
1168 | int ret; | |
1fabe148 | 1169 | handle_t *handle; |
ccd979bd MF |
1170 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1171 | struct ocfs2_dinode *di; | |
1172 | ||
b0697053 | 1173 | mlog_entry("(Inode %llu, mode 0%o)\n", |
b2580103 | 1174 | (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode); |
ccd979bd | 1175 | |
65eff9cc | 1176 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
1177 | if (IS_ERR(handle)) { |
1178 | ret = PTR_ERR(handle); | |
ccd979bd MF |
1179 | mlog_errno(ret); |
1180 | goto out; | |
1181 | } | |
1182 | ||
0cf2f763 | 1183 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 1184 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1185 | if (ret < 0) { |
1186 | mlog_errno(ret); | |
b2580103 | 1187 | goto out_trans; |
ccd979bd MF |
1188 | } |
1189 | ||
1190 | inode->i_mode &= ~S_ISUID; | |
1191 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) | |
1192 | inode->i_mode &= ~S_ISGID; | |
1193 | ||
1194 | di = (struct ocfs2_dinode *) bh->b_data; | |
1195 | di->i_mode = cpu_to_le16(inode->i_mode); | |
1196 | ||
1197 | ret = ocfs2_journal_dirty(handle, bh); | |
1198 | if (ret < 0) | |
1199 | mlog_errno(ret); | |
b2580103 | 1200 | |
ccd979bd | 1201 | out_trans: |
02dc1af4 | 1202 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
1203 | out: |
1204 | mlog_exit(ret); | |
1205 | return ret; | |
1206 | } | |
1207 | ||
9517bac6 MF |
1208 | /* |
1209 | * Will look for holes and unwritten extents in the range starting at | |
1210 | * pos for count bytes (inclusive). | |
1211 | */ | |
1212 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, | |
1213 | size_t count) | |
1214 | { | |
1215 | int ret = 0; | |
49cb8d2d | 1216 | unsigned int extent_flags; |
9517bac6 MF |
1217 | u32 cpos, clusters, extent_len, phys_cpos; |
1218 | struct super_block *sb = inode->i_sb; | |
1219 | ||
1220 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
1221 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
1222 | ||
1223 | while (clusters) { | |
49cb8d2d MF |
1224 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
1225 | &extent_flags); | |
9517bac6 MF |
1226 | if (ret < 0) { |
1227 | mlog_errno(ret); | |
1228 | goto out; | |
1229 | } | |
1230 | ||
49cb8d2d | 1231 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
9517bac6 MF |
1232 | ret = 1; |
1233 | break; | |
1234 | } | |
1235 | ||
1236 | if (extent_len > clusters) | |
1237 | extent_len = clusters; | |
1238 | ||
1239 | clusters -= extent_len; | |
1240 | cpos += extent_len; | |
1241 | } | |
1242 | out: | |
1243 | return ret; | |
1244 | } | |
1245 | ||
b2580103 MF |
1246 | static int ocfs2_write_remove_suid(struct inode *inode) |
1247 | { | |
1248 | int ret; | |
1249 | struct buffer_head *bh = NULL; | |
b2580103 | 1250 | |
b657c95c | 1251 | ret = ocfs2_read_inode_block(inode, &bh); |
b2580103 MF |
1252 | if (ret < 0) { |
1253 | mlog_errno(ret); | |
1254 | goto out; | |
1255 | } | |
1256 | ||
1257 | ret = __ocfs2_write_remove_suid(inode, bh); | |
1258 | out: | |
1259 | brelse(bh); | |
1260 | return ret; | |
1261 | } | |
1262 | ||
2ae99a60 MF |
1263 | /* |
1264 | * Allocate enough extents to cover the region starting at byte offset | |
1265 | * start for len bytes. Existing extents are skipped, any extents | |
1266 | * added are marked as "unwritten". | |
1267 | */ | |
1268 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, | |
1269 | u64 start, u64 len) | |
1270 | { | |
1271 | int ret; | |
1272 | u32 cpos, phys_cpos, clusters, alloc_size; | |
1afc32b9 MF |
1273 | u64 end = start + len; |
1274 | struct buffer_head *di_bh = NULL; | |
1275 | ||
1276 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
b657c95c | 1277 | ret = ocfs2_read_inode_block(inode, &di_bh); |
1afc32b9 MF |
1278 | if (ret) { |
1279 | mlog_errno(ret); | |
1280 | goto out; | |
1281 | } | |
1282 | ||
1283 | /* | |
1284 | * Nothing to do if the requested reservation range | |
1285 | * fits within the inode. | |
1286 | */ | |
1287 | if (ocfs2_size_fits_inline_data(di_bh, end)) | |
1288 | goto out; | |
1289 | ||
1290 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1291 | if (ret) { | |
1292 | mlog_errno(ret); | |
1293 | goto out; | |
1294 | } | |
1295 | } | |
2ae99a60 MF |
1296 | |
1297 | /* | |
1298 | * We consider both start and len to be inclusive. | |
1299 | */ | |
1300 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1301 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); | |
1302 | clusters -= cpos; | |
1303 | ||
1304 | while (clusters) { | |
1305 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1306 | &alloc_size, NULL); | |
1307 | if (ret) { | |
1308 | mlog_errno(ret); | |
1309 | goto out; | |
1310 | } | |
1311 | ||
1312 | /* | |
1313 | * Hole or existing extent len can be arbitrary, so | |
1314 | * cap it to our own allocation request. | |
1315 | */ | |
1316 | if (alloc_size > clusters) | |
1317 | alloc_size = clusters; | |
1318 | ||
1319 | if (phys_cpos) { | |
1320 | /* | |
1321 | * We already have an allocation at this | |
1322 | * region so we can safely skip it. | |
1323 | */ | |
1324 | goto next; | |
1325 | } | |
1326 | ||
1327 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); | |
1328 | if (ret) { | |
1329 | if (ret != -ENOSPC) | |
1330 | mlog_errno(ret); | |
1331 | goto out; | |
1332 | } | |
1333 | ||
1334 | next: | |
1335 | cpos += alloc_size; | |
1336 | clusters -= alloc_size; | |
1337 | } | |
1338 | ||
1339 | ret = 0; | |
1340 | out: | |
1afc32b9 MF |
1341 | |
1342 | brelse(di_bh); | |
2ae99a60 MF |
1343 | return ret; |
1344 | } | |
1345 | ||
063c4561 MF |
1346 | /* |
1347 | * Truncate a byte range, avoiding pages within partial clusters. This | |
1348 | * preserves those pages for the zeroing code to write to. | |
1349 | */ | |
1350 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, | |
1351 | u64 byte_len) | |
1352 | { | |
1353 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1354 | loff_t start, end; | |
1355 | struct address_space *mapping = inode->i_mapping; | |
1356 | ||
1357 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); | |
1358 | end = byte_start + byte_len; | |
1359 | end = end & ~(osb->s_clustersize - 1); | |
1360 | ||
1361 | if (start < end) { | |
1362 | unmap_mapping_range(mapping, start, end - start, 0); | |
1363 | truncate_inode_pages_range(mapping, start, end - 1); | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | static int ocfs2_zero_partial_clusters(struct inode *inode, | |
1368 | u64 start, u64 len) | |
1369 | { | |
1370 | int ret = 0; | |
1371 | u64 tmpend, end = start + len; | |
1372 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1373 | unsigned int csize = osb->s_clustersize; | |
1374 | handle_t *handle; | |
1375 | ||
1376 | /* | |
1377 | * The "start" and "end" values are NOT necessarily part of | |
1378 | * the range whose allocation is being deleted. Rather, this | |
1379 | * is what the user passed in with the request. We must zero | |
1380 | * partial clusters here. There's no need to worry about | |
1381 | * physical allocation - the zeroing code knows to skip holes. | |
1382 | */ | |
1383 | mlog(0, "byte start: %llu, end: %llu\n", | |
1384 | (unsigned long long)start, (unsigned long long)end); | |
1385 | ||
1386 | /* | |
1387 | * If both edges are on a cluster boundary then there's no | |
1388 | * zeroing required as the region is part of the allocation to | |
1389 | * be truncated. | |
1390 | */ | |
1391 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) | |
1392 | goto out; | |
1393 | ||
1394 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
1395 | if (IS_ERR(handle)) { |
1396 | ret = PTR_ERR(handle); | |
063c4561 MF |
1397 | mlog_errno(ret); |
1398 | goto out; | |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * We want to get the byte offset of the end of the 1st cluster. | |
1403 | */ | |
1404 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); | |
1405 | if (tmpend > end) | |
1406 | tmpend = end; | |
1407 | ||
1408 | mlog(0, "1st range: start: %llu, tmpend: %llu\n", | |
1409 | (unsigned long long)start, (unsigned long long)tmpend); | |
1410 | ||
1411 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); | |
1412 | if (ret) | |
1413 | mlog_errno(ret); | |
1414 | ||
1415 | if (tmpend < end) { | |
1416 | /* | |
1417 | * This may make start and end equal, but the zeroing | |
1418 | * code will skip any work in that case so there's no | |
1419 | * need to catch it up here. | |
1420 | */ | |
1421 | start = end & ~(osb->s_clustersize - 1); | |
1422 | ||
1423 | mlog(0, "2nd range: start: %llu, end: %llu\n", | |
1424 | (unsigned long long)start, (unsigned long long)end); | |
1425 | ||
1426 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); | |
1427 | if (ret) | |
1428 | mlog_errno(ret); | |
1429 | } | |
1430 | ||
1431 | ocfs2_commit_trans(osb, handle); | |
1432 | out: | |
1433 | return ret; | |
1434 | } | |
1435 | ||
1436 | static int ocfs2_remove_inode_range(struct inode *inode, | |
1437 | struct buffer_head *di_bh, u64 byte_start, | |
1438 | u64 byte_len) | |
1439 | { | |
1440 | int ret = 0; | |
1441 | u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size; | |
1442 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1443 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
b1967d0e | 1444 | struct address_space *mapping = inode->i_mapping; |
fecc0112 | 1445 | struct ocfs2_extent_tree et; |
063c4561 | 1446 | |
5e404e9e | 1447 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
063c4561 MF |
1448 | ocfs2_init_dealloc_ctxt(&dealloc); |
1449 | ||
1450 | if (byte_len == 0) | |
1451 | return 0; | |
1452 | ||
1afc32b9 MF |
1453 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
1454 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, | |
b1967d0e MF |
1455 | byte_start + byte_len, 0); |
1456 | if (ret) { | |
1afc32b9 | 1457 | mlog_errno(ret); |
b1967d0e MF |
1458 | goto out; |
1459 | } | |
1460 | /* | |
1461 | * There's no need to get fancy with the page cache | |
1462 | * truncate of an inline-data inode. We're talking | |
1463 | * about less than a page here, which will be cached | |
1464 | * in the dinode buffer anyway. | |
1465 | */ | |
1466 | unmap_mapping_range(mapping, 0, 0, 0); | |
1467 | truncate_inode_pages(mapping, 0); | |
1468 | goto out; | |
1afc32b9 MF |
1469 | } |
1470 | ||
063c4561 MF |
1471 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
1472 | trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits; | |
1473 | if (trunc_len >= trunc_start) | |
1474 | trunc_len -= trunc_start; | |
1475 | else | |
1476 | trunc_len = 0; | |
1477 | ||
1478 | mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n", | |
1479 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1480 | (unsigned long long)byte_start, | |
1481 | (unsigned long long)byte_len, trunc_start, trunc_len); | |
1482 | ||
1483 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); | |
1484 | if (ret) { | |
1485 | mlog_errno(ret); | |
1486 | goto out; | |
1487 | } | |
1488 | ||
1489 | cpos = trunc_start; | |
1490 | while (trunc_len) { | |
1491 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1492 | &alloc_size, NULL); | |
1493 | if (ret) { | |
1494 | mlog_errno(ret); | |
1495 | goto out; | |
1496 | } | |
1497 | ||
1498 | if (alloc_size > trunc_len) | |
1499 | alloc_size = trunc_len; | |
1500 | ||
1501 | /* Only do work for non-holes */ | |
1502 | if (phys_cpos != 0) { | |
fecc0112 MF |
1503 | ret = ocfs2_remove_btree_range(inode, &et, cpos, |
1504 | phys_cpos, alloc_size, | |
1505 | &dealloc); | |
063c4561 MF |
1506 | if (ret) { |
1507 | mlog_errno(ret); | |
1508 | goto out; | |
1509 | } | |
1510 | } | |
1511 | ||
1512 | cpos += alloc_size; | |
1513 | trunc_len -= alloc_size; | |
1514 | } | |
1515 | ||
1516 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); | |
1517 | ||
1518 | out: | |
1519 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
1520 | ocfs2_run_deallocs(osb, &dealloc); | |
1521 | ||
1522 | return ret; | |
1523 | } | |
1524 | ||
b2580103 MF |
1525 | /* |
1526 | * Parts of this function taken from xfs_change_file_space() | |
1527 | */ | |
385820a3 MF |
1528 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
1529 | loff_t f_pos, unsigned int cmd, | |
1530 | struct ocfs2_space_resv *sr, | |
1531 | int change_size) | |
b2580103 MF |
1532 | { |
1533 | int ret; | |
1534 | s64 llen; | |
385820a3 | 1535 | loff_t size; |
b2580103 MF |
1536 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1537 | struct buffer_head *di_bh = NULL; | |
1538 | handle_t *handle; | |
a00cce35 | 1539 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
b2580103 | 1540 | |
b2580103 MF |
1541 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
1542 | return -EROFS; | |
1543 | ||
1544 | mutex_lock(&inode->i_mutex); | |
1545 | ||
1546 | /* | |
1547 | * This prevents concurrent writes on other nodes | |
1548 | */ | |
1549 | ret = ocfs2_rw_lock(inode, 1); | |
1550 | if (ret) { | |
1551 | mlog_errno(ret); | |
1552 | goto out; | |
1553 | } | |
1554 | ||
e63aecb6 | 1555 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
b2580103 MF |
1556 | if (ret) { |
1557 | mlog_errno(ret); | |
1558 | goto out_rw_unlock; | |
1559 | } | |
1560 | ||
1561 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { | |
1562 | ret = -EPERM; | |
e63aecb6 | 1563 | goto out_inode_unlock; |
b2580103 MF |
1564 | } |
1565 | ||
1566 | switch (sr->l_whence) { | |
1567 | case 0: /*SEEK_SET*/ | |
1568 | break; | |
1569 | case 1: /*SEEK_CUR*/ | |
385820a3 | 1570 | sr->l_start += f_pos; |
b2580103 MF |
1571 | break; |
1572 | case 2: /*SEEK_END*/ | |
1573 | sr->l_start += i_size_read(inode); | |
1574 | break; | |
1575 | default: | |
1576 | ret = -EINVAL; | |
e63aecb6 | 1577 | goto out_inode_unlock; |
b2580103 MF |
1578 | } |
1579 | sr->l_whence = 0; | |
1580 | ||
1581 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; | |
1582 | ||
1583 | if (sr->l_start < 0 | |
1584 | || sr->l_start > max_off | |
1585 | || (sr->l_start + llen) < 0 | |
1586 | || (sr->l_start + llen) > max_off) { | |
1587 | ret = -EINVAL; | |
e63aecb6 | 1588 | goto out_inode_unlock; |
b2580103 | 1589 | } |
385820a3 | 1590 | size = sr->l_start + sr->l_len; |
b2580103 MF |
1591 | |
1592 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { | |
1593 | if (sr->l_len <= 0) { | |
1594 | ret = -EINVAL; | |
e63aecb6 | 1595 | goto out_inode_unlock; |
b2580103 MF |
1596 | } |
1597 | } | |
1598 | ||
385820a3 | 1599 | if (file && should_remove_suid(file->f_path.dentry)) { |
b2580103 MF |
1600 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
1601 | if (ret) { | |
1602 | mlog_errno(ret); | |
e63aecb6 | 1603 | goto out_inode_unlock; |
b2580103 MF |
1604 | } |
1605 | } | |
1606 | ||
1607 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1608 | switch (cmd) { | |
1609 | case OCFS2_IOC_RESVSP: | |
1610 | case OCFS2_IOC_RESVSP64: | |
1611 | /* | |
1612 | * This takes unsigned offsets, but the signed ones we | |
1613 | * pass have been checked against overflow above. | |
1614 | */ | |
1615 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, | |
1616 | sr->l_len); | |
1617 | break; | |
1618 | case OCFS2_IOC_UNRESVSP: | |
1619 | case OCFS2_IOC_UNRESVSP64: | |
1620 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, | |
1621 | sr->l_len); | |
1622 | break; | |
1623 | default: | |
1624 | ret = -EINVAL; | |
1625 | } | |
1626 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1627 | if (ret) { | |
1628 | mlog_errno(ret); | |
e63aecb6 | 1629 | goto out_inode_unlock; |
b2580103 MF |
1630 | } |
1631 | ||
1632 | /* | |
1633 | * We update c/mtime for these changes | |
1634 | */ | |
1635 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1636 | if (IS_ERR(handle)) { | |
1637 | ret = PTR_ERR(handle); | |
1638 | mlog_errno(ret); | |
e63aecb6 | 1639 | goto out_inode_unlock; |
b2580103 MF |
1640 | } |
1641 | ||
385820a3 MF |
1642 | if (change_size && i_size_read(inode) < size) |
1643 | i_size_write(inode, size); | |
1644 | ||
b2580103 MF |
1645 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
1646 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); | |
1647 | if (ret < 0) | |
1648 | mlog_errno(ret); | |
1649 | ||
1650 | ocfs2_commit_trans(osb, handle); | |
1651 | ||
e63aecb6 | 1652 | out_inode_unlock: |
b2580103 | 1653 | brelse(di_bh); |
e63aecb6 | 1654 | ocfs2_inode_unlock(inode, 1); |
b2580103 MF |
1655 | out_rw_unlock: |
1656 | ocfs2_rw_unlock(inode, 1); | |
1657 | ||
b2580103 | 1658 | out: |
c259ae52 | 1659 | mutex_unlock(&inode->i_mutex); |
b2580103 MF |
1660 | return ret; |
1661 | } | |
1662 | ||
385820a3 MF |
1663 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
1664 | struct ocfs2_space_resv *sr) | |
1665 | { | |
1666 | struct inode *inode = file->f_path.dentry->d_inode; | |
c19a28e1 | 1667 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
385820a3 MF |
1668 | |
1669 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && | |
1670 | !ocfs2_writes_unwritten_extents(osb)) | |
1671 | return -ENOTTY; | |
1672 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && | |
1673 | !ocfs2_sparse_alloc(osb)) | |
1674 | return -ENOTTY; | |
1675 | ||
1676 | if (!S_ISREG(inode->i_mode)) | |
1677 | return -EINVAL; | |
1678 | ||
1679 | if (!(file->f_mode & FMODE_WRITE)) | |
1680 | return -EBADF; | |
1681 | ||
1682 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); | |
1683 | } | |
1684 | ||
1685 | static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset, | |
1686 | loff_t len) | |
1687 | { | |
1688 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1689 | struct ocfs2_space_resv sr; | |
1690 | int change_size = 1; | |
1691 | ||
1692 | if (!ocfs2_writes_unwritten_extents(osb)) | |
1693 | return -EOPNOTSUPP; | |
1694 | ||
1695 | if (S_ISDIR(inode->i_mode)) | |
1696 | return -ENODEV; | |
1697 | ||
1698 | if (mode & FALLOC_FL_KEEP_SIZE) | |
1699 | change_size = 0; | |
1700 | ||
1701 | sr.l_whence = 0; | |
1702 | sr.l_start = (s64)offset; | |
1703 | sr.l_len = (s64)len; | |
1704 | ||
1705 | return __ocfs2_change_file_space(NULL, inode, offset, | |
1706 | OCFS2_IOC_RESVSP64, &sr, change_size); | |
1707 | } | |
1708 | ||
293b2f70 TM |
1709 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
1710 | size_t count) | |
1711 | { | |
1712 | int ret = 0; | |
1713 | unsigned int extent_flags; | |
1714 | u32 cpos, clusters, extent_len, phys_cpos; | |
1715 | struct super_block *sb = inode->i_sb; | |
1716 | ||
1717 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || | |
2f48d593 TM |
1718 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
1719 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) | |
293b2f70 TM |
1720 | return 0; |
1721 | ||
1722 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
1723 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
1724 | ||
1725 | while (clusters) { | |
1726 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, | |
1727 | &extent_flags); | |
1728 | if (ret < 0) { | |
1729 | mlog_errno(ret); | |
1730 | goto out; | |
1731 | } | |
1732 | ||
1733 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { | |
1734 | ret = 1; | |
1735 | break; | |
1736 | } | |
1737 | ||
1738 | if (extent_len > clusters) | |
1739 | extent_len = clusters; | |
1740 | ||
1741 | clusters -= extent_len; | |
1742 | cpos += extent_len; | |
1743 | } | |
1744 | out: | |
1745 | return ret; | |
1746 | } | |
1747 | ||
1748 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, | |
1749 | loff_t pos, size_t count, | |
1750 | int *meta_level) | |
1751 | { | |
1752 | int ret; | |
1753 | struct buffer_head *di_bh = NULL; | |
1754 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1755 | u32 clusters = | |
1756 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; | |
1757 | ||
1758 | ret = ocfs2_inode_lock(inode, &di_bh, 1); | |
1759 | if (ret) { | |
1760 | mlog_errno(ret); | |
1761 | goto out; | |
1762 | } | |
1763 | ||
1764 | *meta_level = 1; | |
1765 | ||
37f8a2bf | 1766 | ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX); |
293b2f70 TM |
1767 | if (ret) |
1768 | mlog_errno(ret); | |
1769 | out: | |
1770 | brelse(di_bh); | |
1771 | return ret; | |
1772 | } | |
1773 | ||
8659ac25 TY |
1774 | static int ocfs2_prepare_inode_for_write(struct dentry *dentry, |
1775 | loff_t *ppos, | |
1776 | size_t count, | |
9517bac6 | 1777 | int appending, |
86470e98 TM |
1778 | int *direct_io, |
1779 | int *has_refcount) | |
ccd979bd | 1780 | { |
65ed39d6 | 1781 | int ret = 0, meta_level = 0; |
8659ac25 | 1782 | struct inode *inode = dentry->d_inode; |
65ed39d6 | 1783 | loff_t saved_pos, end; |
ccd979bd | 1784 | |
2bd63216 | 1785 | /* |
65ed39d6 MF |
1786 | * We start with a read level meta lock and only jump to an ex |
1787 | * if we need to make modifications here. | |
ccd979bd | 1788 | */ |
ccd979bd | 1789 | for(;;) { |
e63aecb6 | 1790 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
ccd979bd MF |
1791 | if (ret < 0) { |
1792 | meta_level = -1; | |
1793 | mlog_errno(ret); | |
1794 | goto out; | |
1795 | } | |
1796 | ||
1797 | /* Clear suid / sgid if necessary. We do this here | |
1798 | * instead of later in the write path because | |
1799 | * remove_suid() calls ->setattr without any hint that | |
1800 | * we may have already done our cluster locking. Since | |
1801 | * ocfs2_setattr() *must* take cluster locks to | |
1802 | * proceeed, this will lead us to recursively lock the | |
1803 | * inode. There's also the dinode i_size state which | |
1804 | * can be lost via setattr during extending writes (we | |
1805 | * set inode->i_size at the end of a write. */ | |
8659ac25 | 1806 | if (should_remove_suid(dentry)) { |
ccd979bd | 1807 | if (meta_level == 0) { |
e63aecb6 | 1808 | ocfs2_inode_unlock(inode, meta_level); |
ccd979bd MF |
1809 | meta_level = 1; |
1810 | continue; | |
1811 | } | |
1812 | ||
1813 | ret = ocfs2_write_remove_suid(inode); | |
1814 | if (ret < 0) { | |
1815 | mlog_errno(ret); | |
8659ac25 | 1816 | goto out_unlock; |
ccd979bd MF |
1817 | } |
1818 | } | |
1819 | ||
1820 | /* work on a copy of ppos until we're sure that we won't have | |
1821 | * to recalculate it due to relocking. */ | |
8659ac25 | 1822 | if (appending) { |
ccd979bd MF |
1823 | saved_pos = i_size_read(inode); |
1824 | mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos); | |
1825 | } else { | |
8659ac25 | 1826 | saved_pos = *ppos; |
ccd979bd | 1827 | } |
3a0782d0 | 1828 | |
65ed39d6 | 1829 | end = saved_pos + count; |
9517bac6 | 1830 | |
293b2f70 TM |
1831 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
1832 | if (ret == 1) { | |
1833 | ocfs2_inode_unlock(inode, meta_level); | |
1834 | meta_level = -1; | |
1835 | ||
1836 | ret = ocfs2_prepare_inode_for_refcount(inode, | |
1837 | saved_pos, | |
1838 | count, | |
1839 | &meta_level); | |
86470e98 TM |
1840 | if (has_refcount) |
1841 | *has_refcount = 1; | |
96a1cc73 WW |
1842 | if (direct_io) |
1843 | *direct_io = 0; | |
293b2f70 TM |
1844 | } |
1845 | ||
1846 | if (ret < 0) { | |
1847 | mlog_errno(ret); | |
1848 | goto out_unlock; | |
1849 | } | |
1850 | ||
65ed39d6 MF |
1851 | /* |
1852 | * Skip the O_DIRECT checks if we don't need | |
1853 | * them. | |
1854 | */ | |
1855 | if (!direct_io || !(*direct_io)) | |
9517bac6 | 1856 | break; |
9517bac6 | 1857 | |
1afc32b9 MF |
1858 | /* |
1859 | * There's no sane way to do direct writes to an inode | |
1860 | * with inline data. | |
1861 | */ | |
1862 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1863 | *direct_io = 0; | |
1864 | break; | |
1865 | } | |
1866 | ||
3a0782d0 | 1867 | /* |
65ed39d6 MF |
1868 | * Allowing concurrent direct writes means |
1869 | * i_size changes wouldn't be synchronized, so | |
1870 | * one node could wind up truncating another | |
1871 | * nodes writes. | |
3a0782d0 | 1872 | */ |
65ed39d6 MF |
1873 | if (end > i_size_read(inode)) { |
1874 | *direct_io = 0; | |
ccd979bd | 1875 | break; |
ccd979bd MF |
1876 | } |
1877 | ||
65ed39d6 MF |
1878 | /* |
1879 | * We don't fill holes during direct io, so | |
1880 | * check for them here. If any are found, the | |
1881 | * caller will have to retake some cluster | |
1882 | * locks and initiate the io as buffered. | |
1883 | */ | |
1884 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); | |
1885 | if (ret == 1) { | |
1886 | *direct_io = 0; | |
1887 | ret = 0; | |
1888 | } else if (ret < 0) | |
1889 | mlog_errno(ret); | |
ccd979bd MF |
1890 | break; |
1891 | } | |
1892 | ||
8659ac25 TY |
1893 | if (appending) |
1894 | *ppos = saved_pos; | |
1895 | ||
1896 | out_unlock: | |
293b2f70 TM |
1897 | if (meta_level >= 0) |
1898 | ocfs2_inode_unlock(inode, meta_level); | |
8659ac25 TY |
1899 | |
1900 | out: | |
1901 | return ret; | |
1902 | } | |
1903 | ||
1904 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, | |
1905 | const struct iovec *iov, | |
1906 | unsigned long nr_segs, | |
1907 | loff_t pos) | |
1908 | { | |
9517bac6 | 1909 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
86470e98 | 1910 | int can_do_direct, has_refcount = 0; |
9517bac6 MF |
1911 | ssize_t written = 0; |
1912 | size_t ocount; /* original count */ | |
1913 | size_t count; /* after file limit checks */ | |
9ea2d32f MF |
1914 | loff_t old_size, *ppos = &iocb->ki_pos; |
1915 | u32 old_clusters; | |
9517bac6 MF |
1916 | struct file *file = iocb->ki_filp; |
1917 | struct inode *inode = file->f_path.dentry->d_inode; | |
9ea2d32f | 1918 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
9517bac6 MF |
1919 | |
1920 | mlog_entry("(0x%p, %u, '%.*s')\n", file, | |
8659ac25 | 1921 | (unsigned int)nr_segs, |
9517bac6 MF |
1922 | file->f_path.dentry->d_name.len, |
1923 | file->f_path.dentry->d_name.name); | |
8659ac25 | 1924 | |
8659ac25 TY |
1925 | if (iocb->ki_left == 0) |
1926 | return 0; | |
1927 | ||
9517bac6 MF |
1928 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
1929 | ||
1930 | appending = file->f_flags & O_APPEND ? 1 : 0; | |
1931 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; | |
1932 | ||
8659ac25 | 1933 | mutex_lock(&inode->i_mutex); |
9517bac6 MF |
1934 | |
1935 | relock: | |
8659ac25 | 1936 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ |
9517bac6 | 1937 | if (direct_io) { |
8659ac25 | 1938 | down_read(&inode->i_alloc_sem); |
9517bac6 | 1939 | have_alloc_sem = 1; |
8659ac25 TY |
1940 | } |
1941 | ||
1942 | /* concurrent O_DIRECT writes are allowed */ | |
9517bac6 | 1943 | rw_level = !direct_io; |
8659ac25 TY |
1944 | ret = ocfs2_rw_lock(inode, rw_level); |
1945 | if (ret < 0) { | |
8659ac25 | 1946 | mlog_errno(ret); |
9517bac6 | 1947 | goto out_sems; |
8659ac25 TY |
1948 | } |
1949 | ||
9517bac6 MF |
1950 | can_do_direct = direct_io; |
1951 | ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos, | |
1952 | iocb->ki_left, appending, | |
86470e98 | 1953 | &can_do_direct, &has_refcount); |
8659ac25 TY |
1954 | if (ret < 0) { |
1955 | mlog_errno(ret); | |
1956 | goto out; | |
1957 | } | |
ccd979bd | 1958 | |
9517bac6 MF |
1959 | /* |
1960 | * We can't complete the direct I/O as requested, fall back to | |
1961 | * buffered I/O. | |
1962 | */ | |
1963 | if (direct_io && !can_do_direct) { | |
1964 | ocfs2_rw_unlock(inode, rw_level); | |
1965 | up_read(&inode->i_alloc_sem); | |
1966 | ||
1967 | have_alloc_sem = 0; | |
1968 | rw_level = -1; | |
1969 | ||
1970 | direct_io = 0; | |
9517bac6 MF |
1971 | goto relock; |
1972 | } | |
1973 | ||
9ea2d32f MF |
1974 | /* |
1975 | * To later detect whether a journal commit for sync writes is | |
1976 | * necessary, we sample i_size, and cluster count here. | |
1977 | */ | |
1978 | old_size = i_size_read(inode); | |
1979 | old_clusters = OCFS2_I(inode)->ip_clusters; | |
1980 | ||
ccd979bd | 1981 | /* communicate with ocfs2_dio_end_io */ |
7cdfc3a1 | 1982 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd | 1983 | |
9517bac6 | 1984 | if (direct_io) { |
b6af1bcd NP |
1985 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
1986 | VERIFY_READ); | |
1987 | if (ret) | |
1988 | goto out_dio; | |
1989 | ||
cefcb800 | 1990 | count = ocount; |
b6af1bcd NP |
1991 | ret = generic_write_checks(file, ppos, &count, |
1992 | S_ISBLK(inode->i_mode)); | |
1993 | if (ret) | |
1994 | goto out_dio; | |
1995 | ||
9517bac6 MF |
1996 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
1997 | ppos, count, ocount); | |
1998 | if (written < 0) { | |
c4354001 DM |
1999 | /* |
2000 | * direct write may have instantiated a few | |
2001 | * blocks outside i_size. Trim these off again. | |
2002 | * Don't need i_size_read because we hold i_mutex. | |
2003 | */ | |
2004 | if (*ppos + count > inode->i_size) | |
2005 | vmtruncate(inode, inode->i_size); | |
9517bac6 MF |
2006 | ret = written; |
2007 | goto out_dio; | |
2008 | } | |
2009 | } else { | |
918941a3 | 2010 | written = __generic_file_aio_write(iocb, iov, nr_segs, ppos); |
9517bac6 | 2011 | } |
ccd979bd | 2012 | |
9517bac6 | 2013 | out_dio: |
ccd979bd | 2014 | /* buffered aio wouldn't have proper lock coverage today */ |
9517bac6 | 2015 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
ccd979bd | 2016 | |
60c48674 TM |
2017 | if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) || |
2018 | ((file->f_flags & O_DIRECT) && has_refcount)) { | |
918941a3 JK |
2019 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
2020 | pos + count - 1); | |
2021 | if (ret < 0) | |
2022 | written = ret; | |
2023 | ||
a03ab788 CL |
2024 | if (!ret && ((old_size != i_size_read(inode)) || |
2025 | (old_clusters != OCFS2_I(inode)->ip_clusters) || | |
2026 | has_refcount)) { | |
2b4e30fb | 2027 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
9ea2d32f MF |
2028 | if (ret < 0) |
2029 | written = ret; | |
2030 | } | |
918941a3 JK |
2031 | |
2032 | if (!ret) | |
2033 | ret = filemap_fdatawait_range(file->f_mapping, pos, | |
2034 | pos + count - 1); | |
9ea2d32f MF |
2035 | } |
2036 | ||
2bd63216 | 2037 | /* |
ccd979bd MF |
2038 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
2039 | * function pointer which is called when o_direct io completes so that | |
2040 | * it can unlock our rw lock. (it's the clustered equivalent of | |
2041 | * i_alloc_sem; protects truncate from racing with pending ios). | |
2042 | * Unfortunately there are error cases which call end_io and others | |
2043 | * that don't. so we don't have to unlock the rw_lock if either an | |
2044 | * async dio is going to do it in the future or an end_io after an | |
2045 | * error has already done it. | |
2046 | */ | |
66b116c9 | 2047 | if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { |
ccd979bd MF |
2048 | rw_level = -1; |
2049 | have_alloc_sem = 0; | |
2050 | } | |
2051 | ||
2052 | out: | |
9517bac6 MF |
2053 | if (rw_level != -1) |
2054 | ocfs2_rw_unlock(inode, rw_level); | |
2055 | ||
2056 | out_sems: | |
ccd979bd MF |
2057 | if (have_alloc_sem) |
2058 | up_read(&inode->i_alloc_sem); | |
9517bac6 | 2059 | |
1b1dcc1b | 2060 | mutex_unlock(&inode->i_mutex); |
ccd979bd | 2061 | |
812e7a6a WW |
2062 | if (written) |
2063 | ret = written; | |
ccd979bd | 2064 | mlog_exit(ret); |
812e7a6a | 2065 | return ret; |
ccd979bd MF |
2066 | } |
2067 | ||
328eaaba MS |
2068 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
2069 | struct file *out, | |
2070 | struct splice_desc *sd) | |
2071 | { | |
2072 | int ret; | |
2073 | ||
2074 | ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, &sd->pos, | |
86470e98 | 2075 | sd->total_len, 0, NULL, NULL); |
328eaaba MS |
2076 | if (ret < 0) { |
2077 | mlog_errno(ret); | |
2078 | return ret; | |
2079 | } | |
2080 | ||
2081 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); | |
2082 | } | |
2083 | ||
8659ac25 TY |
2084 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
2085 | struct file *out, | |
2086 | loff_t *ppos, | |
2087 | size_t len, | |
2088 | unsigned int flags) | |
2089 | { | |
2090 | int ret; | |
328eaaba MS |
2091 | struct address_space *mapping = out->f_mapping; |
2092 | struct inode *inode = mapping->host; | |
2093 | struct splice_desc sd = { | |
2094 | .total_len = len, | |
2095 | .flags = flags, | |
2096 | .pos = *ppos, | |
2097 | .u.file = out, | |
2098 | }; | |
8659ac25 TY |
2099 | |
2100 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe, | |
2101 | (unsigned int)len, | |
d28c9174 JS |
2102 | out->f_path.dentry->d_name.len, |
2103 | out->f_path.dentry->d_name.name); | |
8659ac25 | 2104 | |
328eaaba MS |
2105 | if (pipe->inode) |
2106 | mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT); | |
8659ac25 | 2107 | |
328eaaba MS |
2108 | splice_from_pipe_begin(&sd); |
2109 | do { | |
2110 | ret = splice_from_pipe_next(pipe, &sd); | |
2111 | if (ret <= 0) | |
2112 | break; | |
8659ac25 | 2113 | |
328eaaba MS |
2114 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
2115 | ret = ocfs2_rw_lock(inode, 1); | |
2116 | if (ret < 0) | |
2117 | mlog_errno(ret); | |
2118 | else { | |
2119 | ret = ocfs2_splice_to_file(pipe, out, &sd); | |
2120 | ocfs2_rw_unlock(inode, 1); | |
2121 | } | |
2122 | mutex_unlock(&inode->i_mutex); | |
2123 | } while (ret > 0); | |
2124 | splice_from_pipe_end(pipe, &sd); | |
8659ac25 | 2125 | |
7bfac9ec MS |
2126 | if (pipe->inode) |
2127 | mutex_unlock(&pipe->inode->i_mutex); | |
8659ac25 | 2128 | |
328eaaba MS |
2129 | if (sd.num_spliced) |
2130 | ret = sd.num_spliced; | |
2131 | ||
2132 | if (ret > 0) { | |
2133 | unsigned long nr_pages; | |
d23c937b | 2134 | int err; |
328eaaba | 2135 | |
328eaaba MS |
2136 | nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
2137 | ||
d23c937b JK |
2138 | err = generic_write_sync(out, *ppos, ret); |
2139 | if (err) | |
2140 | ret = err; | |
2141 | else | |
2142 | *ppos += ret; | |
328eaaba | 2143 | |
328eaaba MS |
2144 | balance_dirty_pages_ratelimited_nr(mapping, nr_pages); |
2145 | } | |
8659ac25 TY |
2146 | |
2147 | mlog_exit(ret); | |
2148 | return ret; | |
2149 | } | |
2150 | ||
2151 | static ssize_t ocfs2_file_splice_read(struct file *in, | |
2152 | loff_t *ppos, | |
2153 | struct pipe_inode_info *pipe, | |
2154 | size_t len, | |
2155 | unsigned int flags) | |
2156 | { | |
1962f39a | 2157 | int ret = 0, lock_level = 0; |
d28c9174 | 2158 | struct inode *inode = in->f_path.dentry->d_inode; |
8659ac25 TY |
2159 | |
2160 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe, | |
2161 | (unsigned int)len, | |
d28c9174 JS |
2162 | in->f_path.dentry->d_name.len, |
2163 | in->f_path.dentry->d_name.name); | |
8659ac25 TY |
2164 | |
2165 | /* | |
2166 | * See the comment in ocfs2_file_aio_read() | |
2167 | */ | |
1962f39a | 2168 | ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level); |
8659ac25 TY |
2169 | if (ret < 0) { |
2170 | mlog_errno(ret); | |
2171 | goto bail; | |
2172 | } | |
1962f39a | 2173 | ocfs2_inode_unlock(inode, lock_level); |
8659ac25 TY |
2174 | |
2175 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); | |
2176 | ||
2177 | bail: | |
2178 | mlog_exit(ret); | |
2179 | return ret; | |
2180 | } | |
2181 | ||
ccd979bd | 2182 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
027445c3 BP |
2183 | const struct iovec *iov, |
2184 | unsigned long nr_segs, | |
ccd979bd MF |
2185 | loff_t pos) |
2186 | { | |
25899dee | 2187 | int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0; |
ccd979bd | 2188 | struct file *filp = iocb->ki_filp; |
d28c9174 | 2189 | struct inode *inode = filp->f_path.dentry->d_inode; |
ccd979bd | 2190 | |
027445c3 BP |
2191 | mlog_entry("(0x%p, %u, '%.*s')\n", filp, |
2192 | (unsigned int)nr_segs, | |
d28c9174 JS |
2193 | filp->f_path.dentry->d_name.len, |
2194 | filp->f_path.dentry->d_name.name); | |
ccd979bd MF |
2195 | |
2196 | if (!inode) { | |
2197 | ret = -EINVAL; | |
2198 | mlog_errno(ret); | |
2199 | goto bail; | |
2200 | } | |
2201 | ||
2bd63216 | 2202 | /* |
ccd979bd MF |
2203 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
2204 | * need locks to protect pending reads from racing with truncate. | |
2205 | */ | |
2206 | if (filp->f_flags & O_DIRECT) { | |
2207 | down_read(&inode->i_alloc_sem); | |
2208 | have_alloc_sem = 1; | |
2209 | ||
2210 | ret = ocfs2_rw_lock(inode, 0); | |
2211 | if (ret < 0) { | |
2212 | mlog_errno(ret); | |
2213 | goto bail; | |
2214 | } | |
2215 | rw_level = 0; | |
2216 | /* communicate with ocfs2_dio_end_io */ | |
7cdfc3a1 | 2217 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd MF |
2218 | } |
2219 | ||
c4374f8a MF |
2220 | /* |
2221 | * We're fine letting folks race truncates and extending | |
2222 | * writes with read across the cluster, just like they can | |
2223 | * locally. Hence no rw_lock during read. | |
2bd63216 | 2224 | * |
c4374f8a MF |
2225 | * Take and drop the meta data lock to update inode fields |
2226 | * like i_size. This allows the checks down below | |
2bd63216 | 2227 | * generic_file_aio_read() a chance of actually working. |
c4374f8a | 2228 | */ |
e63aecb6 | 2229 | ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
c4374f8a MF |
2230 | if (ret < 0) { |
2231 | mlog_errno(ret); | |
2232 | goto bail; | |
2233 | } | |
e63aecb6 | 2234 | ocfs2_inode_unlock(inode, lock_level); |
c4374f8a | 2235 | |
027445c3 | 2236 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
ccd979bd | 2237 | if (ret == -EINVAL) |
56753bd3 | 2238 | mlog(0, "generic_file_aio_read returned -EINVAL\n"); |
ccd979bd MF |
2239 | |
2240 | /* buffered aio wouldn't have proper lock coverage today */ | |
2241 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); | |
2242 | ||
2243 | /* see ocfs2_file_aio_write */ | |
2244 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { | |
2245 | rw_level = -1; | |
2246 | have_alloc_sem = 0; | |
2247 | } | |
2248 | ||
2249 | bail: | |
2250 | if (have_alloc_sem) | |
2251 | up_read(&inode->i_alloc_sem); | |
2bd63216 | 2252 | if (rw_level != -1) |
ccd979bd MF |
2253 | ocfs2_rw_unlock(inode, rw_level); |
2254 | mlog_exit(ret); | |
2255 | ||
2256 | return ret; | |
2257 | } | |
2258 | ||
92e1d5be | 2259 | const struct inode_operations ocfs2_file_iops = { |
ccd979bd MF |
2260 | .setattr = ocfs2_setattr, |
2261 | .getattr = ocfs2_getattr, | |
d38eb8db | 2262 | .permission = ocfs2_permission, |
cf1d6c76 TY |
2263 | .setxattr = generic_setxattr, |
2264 | .getxattr = generic_getxattr, | |
2265 | .listxattr = ocfs2_listxattr, | |
2266 | .removexattr = generic_removexattr, | |
385820a3 | 2267 | .fallocate = ocfs2_fallocate, |
00dc417f | 2268 | .fiemap = ocfs2_fiemap, |
ccd979bd MF |
2269 | }; |
2270 | ||
92e1d5be | 2271 | const struct inode_operations ocfs2_special_file_iops = { |
ccd979bd MF |
2272 | .setattr = ocfs2_setattr, |
2273 | .getattr = ocfs2_getattr, | |
d38eb8db | 2274 | .permission = ocfs2_permission, |
ccd979bd MF |
2275 | }; |
2276 | ||
53da4939 MF |
2277 | /* |
2278 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with | |
2279 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! | |
2280 | */ | |
4b6f5d20 | 2281 | const struct file_operations ocfs2_fops = { |
32c3c0e2 | 2282 | .llseek = generic_file_llseek, |
ccd979bd MF |
2283 | .read = do_sync_read, |
2284 | .write = do_sync_write, | |
ccd979bd MF |
2285 | .mmap = ocfs2_mmap, |
2286 | .fsync = ocfs2_sync_file, | |
2287 | .release = ocfs2_file_release, | |
2288 | .open = ocfs2_file_open, | |
2289 | .aio_read = ocfs2_file_aio_read, | |
2290 | .aio_write = ocfs2_file_aio_write, | |
c9ec1488 | 2291 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2292 | #ifdef CONFIG_COMPAT |
2293 | .compat_ioctl = ocfs2_compat_ioctl, | |
2294 | #endif | |
53da4939 | 2295 | .lock = ocfs2_lock, |
53fc622b | 2296 | .flock = ocfs2_flock, |
8659ac25 TY |
2297 | .splice_read = ocfs2_file_splice_read, |
2298 | .splice_write = ocfs2_file_splice_write, | |
ccd979bd MF |
2299 | }; |
2300 | ||
4b6f5d20 | 2301 | const struct file_operations ocfs2_dops = { |
32c3c0e2 | 2302 | .llseek = generic_file_llseek, |
ccd979bd MF |
2303 | .read = generic_read_dir, |
2304 | .readdir = ocfs2_readdir, | |
2305 | .fsync = ocfs2_sync_file, | |
53fc622b MF |
2306 | .release = ocfs2_dir_release, |
2307 | .open = ocfs2_dir_open, | |
c9ec1488 | 2308 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2309 | #ifdef CONFIG_COMPAT |
2310 | .compat_ioctl = ocfs2_compat_ioctl, | |
53da4939 MF |
2311 | #endif |
2312 | .lock = ocfs2_lock, | |
2313 | .flock = ocfs2_flock, | |
2314 | }; | |
2315 | ||
2316 | /* | |
2317 | * POSIX-lockless variants of our file_operations. | |
2318 | * | |
2319 | * These will be used if the underlying cluster stack does not support | |
2320 | * posix file locking, if the user passes the "localflocks" mount | |
2321 | * option, or if we have a local-only fs. | |
2322 | * | |
2323 | * ocfs2_flock is in here because all stacks handle UNIX file locks, | |
2324 | * so we still want it in the case of no stack support for | |
2325 | * plocks. Internally, it will do the right thing when asked to ignore | |
2326 | * the cluster. | |
2327 | */ | |
2328 | const struct file_operations ocfs2_fops_no_plocks = { | |
2329 | .llseek = generic_file_llseek, | |
2330 | .read = do_sync_read, | |
2331 | .write = do_sync_write, | |
2332 | .mmap = ocfs2_mmap, | |
2333 | .fsync = ocfs2_sync_file, | |
2334 | .release = ocfs2_file_release, | |
2335 | .open = ocfs2_file_open, | |
2336 | .aio_read = ocfs2_file_aio_read, | |
2337 | .aio_write = ocfs2_file_aio_write, | |
2338 | .unlocked_ioctl = ocfs2_ioctl, | |
2339 | #ifdef CONFIG_COMPAT | |
2340 | .compat_ioctl = ocfs2_compat_ioctl, | |
2341 | #endif | |
2342 | .flock = ocfs2_flock, | |
2343 | .splice_read = ocfs2_file_splice_read, | |
2344 | .splice_write = ocfs2_file_splice_write, | |
2345 | }; | |
2346 | ||
2347 | const struct file_operations ocfs2_dops_no_plocks = { | |
2348 | .llseek = generic_file_llseek, | |
2349 | .read = generic_read_dir, | |
2350 | .readdir = ocfs2_readdir, | |
2351 | .fsync = ocfs2_sync_file, | |
2352 | .release = ocfs2_dir_release, | |
2353 | .open = ocfs2_dir_open, | |
2354 | .unlocked_ioctl = ocfs2_ioctl, | |
2355 | #ifdef CONFIG_COMPAT | |
2356 | .compat_ioctl = ocfs2_compat_ioctl, | |
586d232b | 2357 | #endif |
53fc622b | 2358 | .flock = ocfs2_flock, |
ccd979bd | 2359 | }; |