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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 MF |
109 | |
110 | spin_lock(&oi->ip_lock); | |
111 | ||
112 | /* Check that the inode hasn't been wiped from disk by another | |
113 | * node. If it hasn't then we're safe as long as we hold the | |
114 | * spin lock until our increment of open count. */ | |
115 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { | |
116 | spin_unlock(&oi->ip_lock); | |
117 | ||
118 | status = -ENOENT; | |
119 | goto leave; | |
120 | } | |
121 | ||
122 | if (mode & O_DIRECT) | |
123 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; | |
124 | ||
125 | oi->ip_open_count++; | |
126 | spin_unlock(&oi->ip_lock); | |
53fc622b MF |
127 | |
128 | status = ocfs2_init_file_private(inode, file); | |
129 | if (status) { | |
130 | /* | |
131 | * We want to set open count back if we're failing the | |
132 | * open. | |
133 | */ | |
134 | spin_lock(&oi->ip_lock); | |
135 | oi->ip_open_count--; | |
136 | spin_unlock(&oi->ip_lock); | |
137 | } | |
138 | ||
ccd979bd MF |
139 | leave: |
140 | mlog_exit(status); | |
141 | return status; | |
142 | } | |
143 | ||
144 | static int ocfs2_file_release(struct inode *inode, struct file *file) | |
145 | { | |
146 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
147 | ||
148 | mlog_entry("(0x%p, 0x%p, '%.*s')\n", inode, file, | |
d28c9174 JS |
149 | file->f_path.dentry->d_name.len, |
150 | file->f_path.dentry->d_name.name); | |
ccd979bd MF |
151 | |
152 | spin_lock(&oi->ip_lock); | |
153 | if (!--oi->ip_open_count) | |
154 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; | |
155 | spin_unlock(&oi->ip_lock); | |
156 | ||
53fc622b MF |
157 | ocfs2_free_file_private(inode, file); |
158 | ||
ccd979bd MF |
159 | mlog_exit(0); |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
53fc622b MF |
164 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
165 | { | |
166 | return ocfs2_init_file_private(inode, file); | |
167 | } | |
168 | ||
169 | static int ocfs2_dir_release(struct inode *inode, struct file *file) | |
170 | { | |
171 | ocfs2_free_file_private(inode, file); | |
172 | return 0; | |
173 | } | |
174 | ||
ccd979bd MF |
175 | static int ocfs2_sync_file(struct file *file, |
176 | struct dentry *dentry, | |
177 | int datasync) | |
178 | { | |
179 | int err = 0; | |
180 | journal_t *journal; | |
181 | struct inode *inode = dentry->d_inode; | |
182 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
183 | ||
184 | mlog_entry("(0x%p, 0x%p, %d, '%.*s')\n", file, dentry, datasync, | |
185 | dentry->d_name.len, dentry->d_name.name); | |
186 | ||
187 | err = ocfs2_sync_inode(dentry->d_inode); | |
188 | if (err) | |
189 | goto bail; | |
190 | ||
e04cc15f HH |
191 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) |
192 | goto bail; | |
193 | ||
ccd979bd | 194 | journal = osb->journal->j_journal; |
2b4e30fb | 195 | err = jbd2_journal_force_commit(journal); |
ccd979bd MF |
196 | |
197 | bail: | |
198 | mlog_exit(err); | |
199 | ||
200 | return (err < 0) ? -EIO : 0; | |
201 | } | |
202 | ||
7f1a37e3 TY |
203 | int ocfs2_should_update_atime(struct inode *inode, |
204 | struct vfsmount *vfsmnt) | |
205 | { | |
206 | struct timespec now; | |
207 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
208 | ||
209 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
210 | return 0; | |
211 | ||
212 | if ((inode->i_flags & S_NOATIME) || | |
213 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
214 | return 0; | |
215 | ||
6c2aad05 MF |
216 | /* |
217 | * We can be called with no vfsmnt structure - NFSD will | |
218 | * sometimes do this. | |
219 | * | |
220 | * Note that our action here is different than touch_atime() - | |
221 | * if we can't tell whether this is a noatime mount, then we | |
222 | * don't know whether to trust the value of s_atime_quantum. | |
223 | */ | |
224 | if (vfsmnt == NULL) | |
225 | return 0; | |
226 | ||
7f1a37e3 TY |
227 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
228 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
229 | return 0; | |
230 | ||
7e913c53 MF |
231 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
232 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || | |
233 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) | |
234 | return 1; | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
7f1a37e3 TY |
239 | now = CURRENT_TIME; |
240 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) | |
241 | return 0; | |
242 | else | |
243 | return 1; | |
244 | } | |
245 | ||
246 | int ocfs2_update_inode_atime(struct inode *inode, | |
247 | struct buffer_head *bh) | |
248 | { | |
249 | int ret; | |
250 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
251 | handle_t *handle; | |
c11e9faf | 252 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
7f1a37e3 TY |
253 | |
254 | mlog_entry_void(); | |
255 | ||
256 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
257 | if (IS_ERR(handle)) { |
258 | ret = PTR_ERR(handle); | |
7f1a37e3 TY |
259 | mlog_errno(ret); |
260 | goto out; | |
261 | } | |
262 | ||
0cf2f763 | 263 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 264 | OCFS2_JOURNAL_ACCESS_WRITE); |
c11e9faf MF |
265 | if (ret) { |
266 | mlog_errno(ret); | |
267 | goto out_commit; | |
268 | } | |
269 | ||
270 | /* | |
271 | * Don't use ocfs2_mark_inode_dirty() here as we don't always | |
272 | * have i_mutex to guard against concurrent changes to other | |
273 | * inode fields. | |
274 | */ | |
7f1a37e3 | 275 | inode->i_atime = CURRENT_TIME; |
c11e9faf MF |
276 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
277 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); | |
278 | ||
279 | ret = ocfs2_journal_dirty(handle, bh); | |
7f1a37e3 TY |
280 | if (ret < 0) |
281 | mlog_errno(ret); | |
282 | ||
c11e9faf | 283 | out_commit: |
7f1a37e3 TY |
284 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
285 | out: | |
286 | mlog_exit(ret); | |
287 | return ret; | |
288 | } | |
289 | ||
6cb129f5 AB |
290 | static int ocfs2_set_inode_size(handle_t *handle, |
291 | struct inode *inode, | |
292 | struct buffer_head *fe_bh, | |
293 | u64 new_i_size) | |
ccd979bd MF |
294 | { |
295 | int status; | |
296 | ||
297 | mlog_entry_void(); | |
298 | i_size_write(inode, new_i_size); | |
8110b073 | 299 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
300 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
301 | ||
302 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
303 | if (status < 0) { | |
304 | mlog_errno(status); | |
305 | goto bail; | |
306 | } | |
307 | ||
308 | bail: | |
309 | mlog_exit(status); | |
310 | return status; | |
311 | } | |
312 | ||
9e33d69f JK |
313 | int ocfs2_simple_size_update(struct inode *inode, |
314 | struct buffer_head *di_bh, | |
315 | u64 new_i_size) | |
ccd979bd MF |
316 | { |
317 | int ret; | |
318 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 319 | handle_t *handle = NULL; |
ccd979bd | 320 | |
65eff9cc | 321 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
322 | if (IS_ERR(handle)) { |
323 | ret = PTR_ERR(handle); | |
ccd979bd MF |
324 | mlog_errno(ret); |
325 | goto out; | |
326 | } | |
327 | ||
328 | ret = ocfs2_set_inode_size(handle, inode, di_bh, | |
329 | new_i_size); | |
330 | if (ret < 0) | |
331 | mlog_errno(ret); | |
332 | ||
02dc1af4 | 333 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
334 | out: |
335 | return ret; | |
336 | } | |
337 | ||
37f8a2bf TM |
338 | static int ocfs2_cow_file_pos(struct inode *inode, |
339 | struct buffer_head *fe_bh, | |
340 | u64 offset) | |
341 | { | |
342 | int status; | |
343 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
344 | unsigned int num_clusters = 0; | |
345 | unsigned int ext_flags = 0; | |
346 | ||
347 | /* | |
348 | * If the new offset is aligned to the range of the cluster, there is | |
349 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to | |
350 | * CoW either. | |
351 | */ | |
352 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) | |
353 | return 0; | |
354 | ||
355 | status = ocfs2_get_clusters(inode, cpos, &phys, | |
356 | &num_clusters, &ext_flags); | |
357 | if (status) { | |
358 | mlog_errno(status); | |
359 | goto out; | |
360 | } | |
361 | ||
362 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
363 | goto out; | |
364 | ||
365 | return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1); | |
366 | ||
367 | out: | |
368 | return status; | |
369 | } | |
370 | ||
ccd979bd MF |
371 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
372 | struct inode *inode, | |
373 | struct buffer_head *fe_bh, | |
374 | u64 new_i_size) | |
375 | { | |
376 | int status; | |
1fabe148 | 377 | handle_t *handle; |
60b11392 | 378 | struct ocfs2_dinode *di; |
35edec1d | 379 | u64 cluster_bytes; |
ccd979bd MF |
380 | |
381 | mlog_entry_void(); | |
382 | ||
37f8a2bf TM |
383 | /* |
384 | * We need to CoW the cluster contains the offset if it is reflinked | |
385 | * since we will call ocfs2_zero_range_for_truncate later which will | |
386 | * write "0" from offset to the end of the cluster. | |
387 | */ | |
388 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); | |
389 | if (status) { | |
390 | mlog_errno(status); | |
391 | return status; | |
392 | } | |
393 | ||
ccd979bd MF |
394 | /* TODO: This needs to actually orphan the inode in this |
395 | * transaction. */ | |
396 | ||
65eff9cc | 397 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ccd979bd MF |
398 | if (IS_ERR(handle)) { |
399 | status = PTR_ERR(handle); | |
400 | mlog_errno(status); | |
401 | goto out; | |
402 | } | |
403 | ||
0cf2f763 | 404 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
13723d00 | 405 | OCFS2_JOURNAL_ACCESS_WRITE); |
60b11392 MF |
406 | if (status < 0) { |
407 | mlog_errno(status); | |
408 | goto out_commit; | |
409 | } | |
410 | ||
411 | /* | |
412 | * Do this before setting i_size. | |
413 | */ | |
35edec1d MF |
414 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
415 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, | |
416 | cluster_bytes); | |
60b11392 MF |
417 | if (status) { |
418 | mlog_errno(status); | |
419 | goto out_commit; | |
420 | } | |
421 | ||
422 | i_size_write(inode, new_i_size); | |
60b11392 MF |
423 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
424 | ||
425 | di = (struct ocfs2_dinode *) fe_bh->b_data; | |
426 | di->i_size = cpu_to_le64(new_i_size); | |
427 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); | |
428 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
429 | ||
430 | status = ocfs2_journal_dirty(handle, fe_bh); | |
ccd979bd MF |
431 | if (status < 0) |
432 | mlog_errno(status); | |
433 | ||
60b11392 | 434 | out_commit: |
02dc1af4 | 435 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 436 | out: |
60b11392 | 437 | |
ccd979bd MF |
438 | mlog_exit(status); |
439 | return status; | |
440 | } | |
441 | ||
442 | static int ocfs2_truncate_file(struct inode *inode, | |
443 | struct buffer_head *di_bh, | |
444 | u64 new_i_size) | |
445 | { | |
446 | int status = 0; | |
447 | struct ocfs2_dinode *fe = NULL; | |
448 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
449 | struct ocfs2_truncate_context *tc = NULL; | |
450 | ||
b0697053 MF |
451 | mlog_entry("(inode = %llu, new_i_size = %llu\n", |
452 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
453 | (unsigned long long)new_i_size); | |
ccd979bd | 454 | |
b657c95c JB |
455 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
456 | * already validated it */ | |
ccd979bd | 457 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
ccd979bd MF |
458 | |
459 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), | |
b0697053 MF |
460 | "Inode %llu, inode i_size = %lld != di " |
461 | "i_size = %llu, i_flags = 0x%x\n", | |
462 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ccd979bd | 463 | i_size_read(inode), |
b0697053 MF |
464 | (unsigned long long)le64_to_cpu(fe->i_size), |
465 | le32_to_cpu(fe->i_flags)); | |
ccd979bd MF |
466 | |
467 | if (new_i_size > le64_to_cpu(fe->i_size)) { | |
b0697053 MF |
468 | mlog(0, "asked to truncate file with size (%llu) to size (%llu)!\n", |
469 | (unsigned long long)le64_to_cpu(fe->i_size), | |
470 | (unsigned long long)new_i_size); | |
ccd979bd MF |
471 | status = -EINVAL; |
472 | mlog_errno(status); | |
473 | goto bail; | |
474 | } | |
475 | ||
b0697053 MF |
476 | mlog(0, "inode %llu, i_size = %llu, new_i_size = %llu\n", |
477 | (unsigned long long)le64_to_cpu(fe->i_blkno), | |
478 | (unsigned long long)le64_to_cpu(fe->i_size), | |
479 | (unsigned long long)new_i_size); | |
ccd979bd MF |
480 | |
481 | /* lets handle the simple truncate cases before doing any more | |
482 | * cluster locking. */ | |
483 | if (new_i_size == le64_to_cpu(fe->i_size)) | |
484 | goto bail; | |
485 | ||
2e89b2e4 MF |
486 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
487 | ||
c934a92d MF |
488 | /* |
489 | * The inode lock forced other nodes to sync and drop their | |
490 | * pages, which (correctly) happens even if we have a truncate | |
491 | * without allocation change - ocfs2 cluster sizes can be much | |
492 | * greater than page size, so we have to truncate them | |
493 | * anyway. | |
494 | */ | |
2e89b2e4 MF |
495 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
496 | truncate_inode_pages(inode->i_mapping, new_i_size); | |
497 | ||
1afc32b9 MF |
498 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
499 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, | |
b1967d0e | 500 | i_size_read(inode), 1); |
1afc32b9 MF |
501 | if (status) |
502 | mlog_errno(status); | |
503 | ||
c934a92d | 504 | goto bail_unlock_sem; |
1afc32b9 MF |
505 | } |
506 | ||
ccd979bd MF |
507 | /* alright, we're going to need to do a full blown alloc size |
508 | * change. Orphan the inode so that recovery can complete the | |
509 | * truncate if necessary. This does the task of marking | |
510 | * i_size. */ | |
511 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); | |
512 | if (status < 0) { | |
513 | mlog_errno(status); | |
c934a92d | 514 | goto bail_unlock_sem; |
ccd979bd MF |
515 | } |
516 | ||
517 | status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc); | |
518 | if (status < 0) { | |
519 | mlog_errno(status); | |
c934a92d | 520 | goto bail_unlock_sem; |
ccd979bd MF |
521 | } |
522 | ||
523 | status = ocfs2_commit_truncate(osb, inode, di_bh, tc); | |
524 | if (status < 0) { | |
525 | mlog_errno(status); | |
c934a92d | 526 | goto bail_unlock_sem; |
ccd979bd MF |
527 | } |
528 | ||
529 | /* TODO: orphan dir cleanup here. */ | |
c934a92d | 530 | bail_unlock_sem: |
2e89b2e4 MF |
531 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
532 | ||
ccd979bd | 533 | bail: |
8b2c0dba TM |
534 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
535 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
ccd979bd MF |
536 | |
537 | mlog_exit(status); | |
538 | return status; | |
539 | } | |
540 | ||
541 | /* | |
0eb8d47e | 542 | * extend file allocation only here. |
ccd979bd MF |
543 | * we'll update all the disk stuff, and oip->alloc_size |
544 | * | |
545 | * expect stuff to be locked, a transaction started and enough data / | |
546 | * metadata reservations in the contexts. | |
547 | * | |
548 | * Will return -EAGAIN, and a reason if a restart is needed. | |
549 | * If passed in, *reason will always be set, even in error. | |
550 | */ | |
0eb8d47e TM |
551 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
552 | struct inode *inode, | |
553 | u32 *logical_offset, | |
554 | u32 clusters_to_add, | |
555 | int mark_unwritten, | |
556 | struct buffer_head *fe_bh, | |
557 | handle_t *handle, | |
558 | struct ocfs2_alloc_context *data_ac, | |
559 | struct ocfs2_alloc_context *meta_ac, | |
560 | enum ocfs2_alloc_restarted *reason_ret) | |
ccd979bd | 561 | { |
f99b9b7c JB |
562 | int ret; |
563 | struct ocfs2_extent_tree et; | |
ccd979bd | 564 | |
5e404e9e | 565 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
cbee7e1a JB |
566 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
567 | clusters_to_add, mark_unwritten, | |
568 | data_ac, meta_ac, reason_ret); | |
f99b9b7c JB |
569 | |
570 | return ret; | |
ccd979bd MF |
571 | } |
572 | ||
2ae99a60 MF |
573 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
574 | u32 clusters_to_add, int mark_unwritten) | |
ccd979bd MF |
575 | { |
576 | int status = 0; | |
577 | int restart_func = 0; | |
abf8b156 | 578 | int credits; |
2ae99a60 | 579 | u32 prev_clusters; |
ccd979bd MF |
580 | struct buffer_head *bh = NULL; |
581 | struct ocfs2_dinode *fe = NULL; | |
1fabe148 | 582 | handle_t *handle = NULL; |
ccd979bd MF |
583 | struct ocfs2_alloc_context *data_ac = NULL; |
584 | struct ocfs2_alloc_context *meta_ac = NULL; | |
585 | enum ocfs2_alloc_restarted why; | |
586 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 587 | struct ocfs2_extent_tree et; |
a90714c1 | 588 | int did_quota = 0; |
ccd979bd MF |
589 | |
590 | mlog_entry("(clusters_to_add = %u)\n", clusters_to_add); | |
591 | ||
dcd0538f MF |
592 | /* |
593 | * This function only exists for file systems which don't | |
594 | * support holes. | |
595 | */ | |
2ae99a60 | 596 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
dcd0538f | 597 | |
b657c95c | 598 | status = ocfs2_read_inode_block(inode, &bh); |
ccd979bd MF |
599 | if (status < 0) { |
600 | mlog_errno(status); | |
601 | goto leave; | |
602 | } | |
ccd979bd | 603 | fe = (struct ocfs2_dinode *) bh->b_data; |
ccd979bd MF |
604 | |
605 | restart_all: | |
606 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); | |
607 | ||
e7d4cb6b TM |
608 | mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, " |
609 | "clusters_to_add = %u\n", | |
610 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
611 | (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters), | |
612 | clusters_to_add); | |
5e404e9e | 613 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
f99b9b7c JB |
614 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
615 | &data_ac, &meta_ac); | |
9517bac6 MF |
616 | if (status) { |
617 | mlog_errno(status); | |
618 | goto leave; | |
619 | } | |
620 | ||
811f933d TM |
621 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list, |
622 | clusters_to_add); | |
65eff9cc | 623 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
624 | if (IS_ERR(handle)) { |
625 | status = PTR_ERR(handle); | |
626 | handle = NULL; | |
627 | mlog_errno(status); | |
628 | goto leave; | |
629 | } | |
630 | ||
631 | restarted_transaction: | |
a90714c1 JK |
632 | if (vfs_dq_alloc_space_nodirty(inode, ocfs2_clusters_to_bytes(osb->sb, |
633 | clusters_to_add))) { | |
634 | status = -EDQUOT; | |
635 | goto leave; | |
636 | } | |
637 | did_quota = 1; | |
638 | ||
ccd979bd MF |
639 | /* reserve a write to the file entry early on - that we if we |
640 | * run out of credits in the allocation path, we can still | |
641 | * update i_size. */ | |
0cf2f763 | 642 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 643 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
644 | if (status < 0) { |
645 | mlog_errno(status); | |
646 | goto leave; | |
647 | } | |
648 | ||
649 | prev_clusters = OCFS2_I(inode)->ip_clusters; | |
650 | ||
0eb8d47e TM |
651 | status = ocfs2_add_inode_data(osb, |
652 | inode, | |
653 | &logical_start, | |
654 | clusters_to_add, | |
655 | mark_unwritten, | |
656 | bh, | |
657 | handle, | |
658 | data_ac, | |
659 | meta_ac, | |
660 | &why); | |
ccd979bd MF |
661 | if ((status < 0) && (status != -EAGAIN)) { |
662 | if (status != -ENOSPC) | |
663 | mlog_errno(status); | |
664 | goto leave; | |
665 | } | |
666 | ||
667 | status = ocfs2_journal_dirty(handle, bh); | |
668 | if (status < 0) { | |
669 | mlog_errno(status); | |
670 | goto leave; | |
671 | } | |
672 | ||
673 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
674 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); | |
675 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
a90714c1 JK |
676 | /* Release unused quota reservation */ |
677 | vfs_dq_free_space(inode, | |
678 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); | |
679 | did_quota = 0; | |
ccd979bd MF |
680 | |
681 | if (why != RESTART_NONE && clusters_to_add) { | |
682 | if (why == RESTART_META) { | |
683 | mlog(0, "restarting function.\n"); | |
684 | restart_func = 1; | |
685 | } else { | |
686 | BUG_ON(why != RESTART_TRANS); | |
687 | ||
688 | mlog(0, "restarting transaction.\n"); | |
689 | /* TODO: This can be more intelligent. */ | |
690 | credits = ocfs2_calc_extend_credits(osb->sb, | |
811f933d | 691 | &fe->id2.i_list, |
ccd979bd | 692 | clusters_to_add); |
1fabe148 | 693 | status = ocfs2_extend_trans(handle, credits); |
ccd979bd MF |
694 | if (status < 0) { |
695 | /* handle still has to be committed at | |
696 | * this point. */ | |
697 | status = -ENOMEM; | |
698 | mlog_errno(status); | |
699 | goto leave; | |
700 | } | |
701 | goto restarted_transaction; | |
702 | } | |
703 | } | |
704 | ||
b0697053 | 705 | mlog(0, "fe: i_clusters = %u, i_size=%llu\n", |
1ca1a111 MF |
706 | le32_to_cpu(fe->i_clusters), |
707 | (unsigned long long)le64_to_cpu(fe->i_size)); | |
ccd979bd | 708 | mlog(0, "inode: ip_clusters=%u, i_size=%lld\n", |
634bf74d | 709 | OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode)); |
ccd979bd MF |
710 | |
711 | leave: | |
a90714c1 JK |
712 | if (status < 0 && did_quota) |
713 | vfs_dq_free_space(inode, | |
714 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); | |
ccd979bd | 715 | if (handle) { |
02dc1af4 | 716 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
717 | handle = NULL; |
718 | } | |
719 | if (data_ac) { | |
720 | ocfs2_free_alloc_context(data_ac); | |
721 | data_ac = NULL; | |
722 | } | |
723 | if (meta_ac) { | |
724 | ocfs2_free_alloc_context(meta_ac); | |
725 | meta_ac = NULL; | |
726 | } | |
727 | if ((!status) && restart_func) { | |
728 | restart_func = 0; | |
729 | goto restart_all; | |
730 | } | |
a81cb88b MF |
731 | brelse(bh); |
732 | bh = NULL; | |
ccd979bd MF |
733 | |
734 | mlog_exit(status); | |
735 | return status; | |
736 | } | |
737 | ||
738 | /* Some parts of this taken from generic_cont_expand, which turned out | |
739 | * to be too fragile to do exactly what we need without us having to | |
4e02ed4b | 740 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
ccd979bd MF |
741 | static int ocfs2_write_zero_page(struct inode *inode, |
742 | u64 size) | |
743 | { | |
744 | struct address_space *mapping = inode->i_mapping; | |
745 | struct page *page; | |
746 | unsigned long index; | |
747 | unsigned int offset; | |
1fabe148 | 748 | handle_t *handle = NULL; |
ccd979bd MF |
749 | int ret; |
750 | ||
751 | offset = (size & (PAGE_CACHE_SIZE-1)); /* Within page */ | |
752 | /* ugh. in prepare/commit_write, if from==to==start of block, we | |
753 | ** skip the prepare. make sure we never send an offset for the start | |
754 | ** of a block | |
755 | */ | |
756 | if ((offset & (inode->i_sb->s_blocksize - 1)) == 0) { | |
757 | offset++; | |
758 | } | |
759 | index = size >> PAGE_CACHE_SHIFT; | |
760 | ||
761 | page = grab_cache_page(mapping, index); | |
762 | if (!page) { | |
763 | ret = -ENOMEM; | |
764 | mlog_errno(ret); | |
765 | goto out; | |
766 | } | |
767 | ||
53013cba | 768 | ret = ocfs2_prepare_write_nolock(inode, page, offset, offset); |
ccd979bd MF |
769 | if (ret < 0) { |
770 | mlog_errno(ret); | |
771 | goto out_unlock; | |
772 | } | |
773 | ||
774 | if (ocfs2_should_order_data(inode)) { | |
775 | handle = ocfs2_start_walk_page_trans(inode, page, offset, | |
776 | offset); | |
777 | if (IS_ERR(handle)) { | |
778 | ret = PTR_ERR(handle); | |
779 | handle = NULL; | |
780 | goto out_unlock; | |
781 | } | |
782 | } | |
783 | ||
784 | /* must not update i_size! */ | |
785 | ret = block_commit_write(page, offset, offset); | |
786 | if (ret < 0) | |
787 | mlog_errno(ret); | |
788 | else | |
789 | ret = 0; | |
790 | ||
791 | if (handle) | |
02dc1af4 | 792 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
ccd979bd MF |
793 | out_unlock: |
794 | unlock_page(page); | |
795 | page_cache_release(page); | |
796 | out: | |
797 | return ret; | |
798 | } | |
799 | ||
800 | static int ocfs2_zero_extend(struct inode *inode, | |
801 | u64 zero_to_size) | |
802 | { | |
803 | int ret = 0; | |
804 | u64 start_off; | |
805 | struct super_block *sb = inode->i_sb; | |
806 | ||
807 | start_off = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); | |
808 | while (start_off < zero_to_size) { | |
809 | ret = ocfs2_write_zero_page(inode, start_off); | |
810 | if (ret < 0) { | |
811 | mlog_errno(ret); | |
812 | goto out; | |
813 | } | |
814 | ||
815 | start_off += sb->s_blocksize; | |
e2057c5a MF |
816 | |
817 | /* | |
818 | * Very large extends have the potential to lock up | |
819 | * the cpu for extended periods of time. | |
820 | */ | |
821 | cond_resched(); | |
ccd979bd MF |
822 | } |
823 | ||
824 | out: | |
825 | return ret; | |
826 | } | |
827 | ||
65ed39d6 MF |
828 | int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to) |
829 | { | |
830 | int ret; | |
831 | u32 clusters_to_add; | |
832 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
833 | ||
834 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); | |
835 | if (clusters_to_add < oi->ip_clusters) | |
836 | clusters_to_add = 0; | |
837 | else | |
838 | clusters_to_add -= oi->ip_clusters; | |
839 | ||
840 | if (clusters_to_add) { | |
841 | ret = __ocfs2_extend_allocation(inode, oi->ip_clusters, | |
842 | clusters_to_add, 0); | |
843 | if (ret) { | |
844 | mlog_errno(ret); | |
845 | goto out; | |
846 | } | |
847 | } | |
848 | ||
849 | /* | |
850 | * Call this even if we don't add any clusters to the tree. We | |
851 | * still need to zero the area between the old i_size and the | |
852 | * new i_size. | |
853 | */ | |
854 | ret = ocfs2_zero_extend(inode, zero_to); | |
855 | if (ret < 0) | |
856 | mlog_errno(ret); | |
857 | ||
858 | out: | |
859 | return ret; | |
860 | } | |
861 | ||
ccd979bd MF |
862 | static int ocfs2_extend_file(struct inode *inode, |
863 | struct buffer_head *di_bh, | |
65ed39d6 | 864 | u64 new_i_size) |
ccd979bd | 865 | { |
c934a92d | 866 | int ret = 0; |
1afc32b9 | 867 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
ccd979bd | 868 | |
65ed39d6 | 869 | BUG_ON(!di_bh); |
53013cba | 870 | |
ccd979bd MF |
871 | /* setattr sometimes calls us like this. */ |
872 | if (new_i_size == 0) | |
873 | goto out; | |
874 | ||
875 | if (i_size_read(inode) == new_i_size) | |
876 | goto out; | |
877 | BUG_ON(new_i_size < i_size_read(inode)); | |
878 | ||
1afc32b9 MF |
879 | /* |
880 | * Fall through for converting inline data, even if the fs | |
881 | * supports sparse files. | |
882 | * | |
883 | * The check for inline data here is legal - nobody can add | |
884 | * the feature since we have i_mutex. We must check it again | |
885 | * after acquiring ip_alloc_sem though, as paths like mmap | |
886 | * might have raced us to converting the inode to extents. | |
887 | */ | |
888 | if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) | |
889 | && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) | |
3a0782d0 | 890 | goto out_update_size; |
ccd979bd | 891 | |
0effef77 | 892 | /* |
65ed39d6 MF |
893 | * The alloc sem blocks people in read/write from reading our |
894 | * allocation until we're done changing it. We depend on | |
895 | * i_mutex to block other extend/truncate calls while we're | |
896 | * here. | |
0effef77 | 897 | */ |
1afc32b9 MF |
898 | down_write(&oi->ip_alloc_sem); |
899 | ||
900 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
901 | /* | |
902 | * We can optimize small extends by keeping the inodes | |
903 | * inline data. | |
904 | */ | |
905 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { | |
906 | up_write(&oi->ip_alloc_sem); | |
907 | goto out_update_size; | |
908 | } | |
909 | ||
910 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
911 | if (ret) { | |
912 | up_write(&oi->ip_alloc_sem); | |
913 | ||
914 | mlog_errno(ret); | |
c934a92d | 915 | goto out; |
1afc32b9 MF |
916 | } |
917 | } | |
918 | ||
919 | if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) | |
920 | ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size); | |
921 | ||
922 | up_write(&oi->ip_alloc_sem); | |
65ed39d6 | 923 | |
0effef77 MF |
924 | if (ret < 0) { |
925 | mlog_errno(ret); | |
c934a92d | 926 | goto out; |
53013cba MF |
927 | } |
928 | ||
3a0782d0 | 929 | out_update_size: |
65ed39d6 MF |
930 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
931 | if (ret < 0) | |
932 | mlog_errno(ret); | |
ccd979bd MF |
933 | |
934 | out: | |
935 | return ret; | |
936 | } | |
937 | ||
938 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
939 | { | |
940 | int status = 0, size_change; | |
941 | struct inode *inode = dentry->d_inode; | |
942 | struct super_block *sb = inode->i_sb; | |
943 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
944 | struct buffer_head *bh = NULL; | |
1fabe148 | 945 | handle_t *handle = NULL; |
65bac575 JK |
946 | int qtype; |
947 | struct dquot *transfer_from[MAXQUOTAS] = { }; | |
948 | struct dquot *transfer_to[MAXQUOTAS] = { }; | |
ccd979bd MF |
949 | |
950 | mlog_entry("(0x%p, '%.*s')\n", dentry, | |
951 | dentry->d_name.len, dentry->d_name.name); | |
952 | ||
bc535809 SM |
953 | /* ensuring we don't even attempt to truncate a symlink */ |
954 | if (S_ISLNK(inode->i_mode)) | |
955 | attr->ia_valid &= ~ATTR_SIZE; | |
956 | ||
ccd979bd MF |
957 | if (attr->ia_valid & ATTR_MODE) |
958 | mlog(0, "mode change: %d\n", attr->ia_mode); | |
959 | if (attr->ia_valid & ATTR_UID) | |
960 | mlog(0, "uid change: %d\n", attr->ia_uid); | |
961 | if (attr->ia_valid & ATTR_GID) | |
962 | mlog(0, "gid change: %d\n", attr->ia_gid); | |
963 | if (attr->ia_valid & ATTR_SIZE) | |
964 | mlog(0, "size change...\n"); | |
965 | if (attr->ia_valid & (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME)) | |
966 | mlog(0, "time change...\n"); | |
967 | ||
968 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ | |
969 | | ATTR_GID | ATTR_UID | ATTR_MODE) | |
970 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) { | |
971 | mlog(0, "can't handle attrs: 0x%x\n", attr->ia_valid); | |
972 | return 0; | |
973 | } | |
974 | ||
975 | status = inode_change_ok(inode, attr); | |
976 | if (status) | |
977 | return status; | |
978 | ||
979 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; | |
980 | if (size_change) { | |
981 | status = ocfs2_rw_lock(inode, 1); | |
982 | if (status < 0) { | |
983 | mlog_errno(status); | |
984 | goto bail; | |
985 | } | |
986 | } | |
987 | ||
e63aecb6 | 988 | status = ocfs2_inode_lock(inode, &bh, 1); |
ccd979bd MF |
989 | if (status < 0) { |
990 | if (status != -ENOENT) | |
991 | mlog_errno(status); | |
992 | goto bail_unlock_rw; | |
993 | } | |
994 | ||
995 | if (size_change && attr->ia_size != i_size_read(inode)) { | |
ce76fd30 MF |
996 | if (attr->ia_size > sb->s_maxbytes) { |
997 | status = -EFBIG; | |
998 | goto bail_unlock; | |
999 | } | |
1000 | ||
2b4e30fb JB |
1001 | if (i_size_read(inode) > attr->ia_size) { |
1002 | if (ocfs2_should_order_data(inode)) { | |
1003 | status = ocfs2_begin_ordered_truncate(inode, | |
1004 | attr->ia_size); | |
1005 | if (status) | |
1006 | goto bail_unlock; | |
1007 | } | |
ccd979bd | 1008 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
2b4e30fb | 1009 | } else |
65ed39d6 | 1010 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
ccd979bd MF |
1011 | if (status < 0) { |
1012 | if (status != -ENOSPC) | |
1013 | mlog_errno(status); | |
1014 | status = -ENOSPC; | |
1015 | goto bail_unlock; | |
1016 | } | |
1017 | } | |
1018 | ||
a90714c1 JK |
1019 | if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || |
1020 | (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) { | |
65bac575 JK |
1021 | /* |
1022 | * Gather pointers to quota structures so that allocation / | |
1023 | * freeing of quota structures happens here and not inside | |
1024 | * vfs_dq_transfer() where we have problems with lock ordering | |
1025 | */ | |
a90714c1 JK |
1026 | if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid |
1027 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1028 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { | |
65bac575 JK |
1029 | transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid, |
1030 | USRQUOTA); | |
1031 | transfer_from[USRQUOTA] = dqget(sb, inode->i_uid, | |
1032 | USRQUOTA); | |
1033 | if (!transfer_to[USRQUOTA] || !transfer_from[USRQUOTA]) { | |
1034 | status = -ESRCH; | |
a90714c1 | 1035 | goto bail_unlock; |
65bac575 | 1036 | } |
a90714c1 JK |
1037 | } |
1038 | if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid | |
1039 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, | |
1040 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { | |
65bac575 JK |
1041 | transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid, |
1042 | GRPQUOTA); | |
1043 | transfer_from[GRPQUOTA] = dqget(sb, inode->i_gid, | |
1044 | GRPQUOTA); | |
1045 | if (!transfer_to[GRPQUOTA] || !transfer_from[GRPQUOTA]) { | |
1046 | status = -ESRCH; | |
a90714c1 | 1047 | goto bail_unlock; |
65bac575 | 1048 | } |
a90714c1 | 1049 | } |
65bac575 JK |
1050 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
1051 | 2 * ocfs2_quota_trans_credits(sb)); | |
a90714c1 JK |
1052 | if (IS_ERR(handle)) { |
1053 | status = PTR_ERR(handle); | |
1054 | mlog_errno(status); | |
1055 | goto bail_unlock; | |
1056 | } | |
1057 | status = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0; | |
1058 | if (status < 0) | |
1059 | goto bail_commit; | |
1060 | } else { | |
1061 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1062 | if (IS_ERR(handle)) { | |
1063 | status = PTR_ERR(handle); | |
1064 | mlog_errno(status); | |
1065 | goto bail_unlock; | |
1066 | } | |
ccd979bd MF |
1067 | } |
1068 | ||
7307de80 MF |
1069 | /* |
1070 | * This will intentionally not wind up calling vmtruncate(), | |
1071 | * since all the work for a size change has been done above. | |
1072 | * Otherwise, we could get into problems with truncate as | |
1073 | * ip_alloc_sem is used there to protect against i_size | |
1074 | * changes. | |
1075 | */ | |
ccd979bd MF |
1076 | status = inode_setattr(inode, attr); |
1077 | if (status < 0) { | |
1078 | mlog_errno(status); | |
1079 | goto bail_commit; | |
1080 | } | |
1081 | ||
1082 | status = ocfs2_mark_inode_dirty(handle, inode, bh); | |
1083 | if (status < 0) | |
1084 | mlog_errno(status); | |
1085 | ||
1086 | bail_commit: | |
02dc1af4 | 1087 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1088 | bail_unlock: |
e63aecb6 | 1089 | ocfs2_inode_unlock(inode, 1); |
ccd979bd MF |
1090 | bail_unlock_rw: |
1091 | if (size_change) | |
1092 | ocfs2_rw_unlock(inode, 1); | |
1093 | bail: | |
a81cb88b | 1094 | brelse(bh); |
ccd979bd | 1095 | |
65bac575 JK |
1096 | /* Release quota pointers in case we acquired them */ |
1097 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) { | |
1098 | dqput(transfer_to[qtype]); | |
1099 | dqput(transfer_from[qtype]); | |
1100 | } | |
1101 | ||
060bc66d TY |
1102 | if (!status && attr->ia_valid & ATTR_MODE) { |
1103 | status = ocfs2_acl_chmod(inode); | |
1104 | if (status < 0) | |
1105 | mlog_errno(status); | |
1106 | } | |
1107 | ||
ccd979bd MF |
1108 | mlog_exit(status); |
1109 | return status; | |
1110 | } | |
1111 | ||
1112 | int ocfs2_getattr(struct vfsmount *mnt, | |
1113 | struct dentry *dentry, | |
1114 | struct kstat *stat) | |
1115 | { | |
1116 | struct inode *inode = dentry->d_inode; | |
1117 | struct super_block *sb = dentry->d_inode->i_sb; | |
1118 | struct ocfs2_super *osb = sb->s_fs_info; | |
1119 | int err; | |
1120 | ||
1121 | mlog_entry_void(); | |
1122 | ||
1123 | err = ocfs2_inode_revalidate(dentry); | |
1124 | if (err) { | |
1125 | if (err != -ENOENT) | |
1126 | mlog_errno(err); | |
1127 | goto bail; | |
1128 | } | |
1129 | ||
1130 | generic_fillattr(inode, stat); | |
1131 | ||
1132 | /* We set the blksize from the cluster size for performance */ | |
1133 | stat->blksize = osb->s_clustersize; | |
1134 | ||
1135 | bail: | |
1136 | mlog_exit(err); | |
1137 | ||
1138 | return err; | |
1139 | } | |
1140 | ||
e6305c43 | 1141 | int ocfs2_permission(struct inode *inode, int mask) |
d38eb8db TY |
1142 | { |
1143 | int ret; | |
1144 | ||
1145 | mlog_entry_void(); | |
1146 | ||
e63aecb6 | 1147 | ret = ocfs2_inode_lock(inode, NULL, 0); |
d38eb8db | 1148 | if (ret) { |
a9f5f707 MF |
1149 | if (ret != -ENOENT) |
1150 | mlog_errno(ret); | |
d38eb8db TY |
1151 | goto out; |
1152 | } | |
1153 | ||
23fc2702 | 1154 | ret = generic_permission(inode, mask, ocfs2_check_acl); |
d38eb8db | 1155 | |
e63aecb6 | 1156 | ocfs2_inode_unlock(inode, 0); |
d38eb8db TY |
1157 | out: |
1158 | mlog_exit(ret); | |
1159 | return ret; | |
1160 | } | |
1161 | ||
b2580103 MF |
1162 | static int __ocfs2_write_remove_suid(struct inode *inode, |
1163 | struct buffer_head *bh) | |
ccd979bd MF |
1164 | { |
1165 | int ret; | |
1fabe148 | 1166 | handle_t *handle; |
ccd979bd MF |
1167 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1168 | struct ocfs2_dinode *di; | |
1169 | ||
b0697053 | 1170 | mlog_entry("(Inode %llu, mode 0%o)\n", |
b2580103 | 1171 | (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode); |
ccd979bd | 1172 | |
65eff9cc | 1173 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
1174 | if (IS_ERR(handle)) { |
1175 | ret = PTR_ERR(handle); | |
ccd979bd MF |
1176 | mlog_errno(ret); |
1177 | goto out; | |
1178 | } | |
1179 | ||
0cf2f763 | 1180 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 1181 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1182 | if (ret < 0) { |
1183 | mlog_errno(ret); | |
b2580103 | 1184 | goto out_trans; |
ccd979bd MF |
1185 | } |
1186 | ||
1187 | inode->i_mode &= ~S_ISUID; | |
1188 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) | |
1189 | inode->i_mode &= ~S_ISGID; | |
1190 | ||
1191 | di = (struct ocfs2_dinode *) bh->b_data; | |
1192 | di->i_mode = cpu_to_le16(inode->i_mode); | |
1193 | ||
1194 | ret = ocfs2_journal_dirty(handle, bh); | |
1195 | if (ret < 0) | |
1196 | mlog_errno(ret); | |
b2580103 | 1197 | |
ccd979bd | 1198 | out_trans: |
02dc1af4 | 1199 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
1200 | out: |
1201 | mlog_exit(ret); | |
1202 | return ret; | |
1203 | } | |
1204 | ||
9517bac6 MF |
1205 | /* |
1206 | * Will look for holes and unwritten extents in the range starting at | |
1207 | * pos for count bytes (inclusive). | |
1208 | */ | |
1209 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, | |
1210 | size_t count) | |
1211 | { | |
1212 | int ret = 0; | |
49cb8d2d | 1213 | unsigned int extent_flags; |
9517bac6 MF |
1214 | u32 cpos, clusters, extent_len, phys_cpos; |
1215 | struct super_block *sb = inode->i_sb; | |
1216 | ||
1217 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
1218 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
1219 | ||
1220 | while (clusters) { | |
49cb8d2d MF |
1221 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
1222 | &extent_flags); | |
9517bac6 MF |
1223 | if (ret < 0) { |
1224 | mlog_errno(ret); | |
1225 | goto out; | |
1226 | } | |
1227 | ||
49cb8d2d | 1228 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
9517bac6 MF |
1229 | ret = 1; |
1230 | break; | |
1231 | } | |
1232 | ||
1233 | if (extent_len > clusters) | |
1234 | extent_len = clusters; | |
1235 | ||
1236 | clusters -= extent_len; | |
1237 | cpos += extent_len; | |
1238 | } | |
1239 | out: | |
1240 | return ret; | |
1241 | } | |
1242 | ||
b2580103 MF |
1243 | static int ocfs2_write_remove_suid(struct inode *inode) |
1244 | { | |
1245 | int ret; | |
1246 | struct buffer_head *bh = NULL; | |
b2580103 | 1247 | |
b657c95c | 1248 | ret = ocfs2_read_inode_block(inode, &bh); |
b2580103 MF |
1249 | if (ret < 0) { |
1250 | mlog_errno(ret); | |
1251 | goto out; | |
1252 | } | |
1253 | ||
1254 | ret = __ocfs2_write_remove_suid(inode, bh); | |
1255 | out: | |
1256 | brelse(bh); | |
1257 | return ret; | |
1258 | } | |
1259 | ||
2ae99a60 MF |
1260 | /* |
1261 | * Allocate enough extents to cover the region starting at byte offset | |
1262 | * start for len bytes. Existing extents are skipped, any extents | |
1263 | * added are marked as "unwritten". | |
1264 | */ | |
1265 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, | |
1266 | u64 start, u64 len) | |
1267 | { | |
1268 | int ret; | |
1269 | u32 cpos, phys_cpos, clusters, alloc_size; | |
1afc32b9 MF |
1270 | u64 end = start + len; |
1271 | struct buffer_head *di_bh = NULL; | |
1272 | ||
1273 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
b657c95c | 1274 | ret = ocfs2_read_inode_block(inode, &di_bh); |
1afc32b9 MF |
1275 | if (ret) { |
1276 | mlog_errno(ret); | |
1277 | goto out; | |
1278 | } | |
1279 | ||
1280 | /* | |
1281 | * Nothing to do if the requested reservation range | |
1282 | * fits within the inode. | |
1283 | */ | |
1284 | if (ocfs2_size_fits_inline_data(di_bh, end)) | |
1285 | goto out; | |
1286 | ||
1287 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1288 | if (ret) { | |
1289 | mlog_errno(ret); | |
1290 | goto out; | |
1291 | } | |
1292 | } | |
2ae99a60 MF |
1293 | |
1294 | /* | |
1295 | * We consider both start and len to be inclusive. | |
1296 | */ | |
1297 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1298 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); | |
1299 | clusters -= cpos; | |
1300 | ||
1301 | while (clusters) { | |
1302 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1303 | &alloc_size, NULL); | |
1304 | if (ret) { | |
1305 | mlog_errno(ret); | |
1306 | goto out; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * Hole or existing extent len can be arbitrary, so | |
1311 | * cap it to our own allocation request. | |
1312 | */ | |
1313 | if (alloc_size > clusters) | |
1314 | alloc_size = clusters; | |
1315 | ||
1316 | if (phys_cpos) { | |
1317 | /* | |
1318 | * We already have an allocation at this | |
1319 | * region so we can safely skip it. | |
1320 | */ | |
1321 | goto next; | |
1322 | } | |
1323 | ||
1324 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); | |
1325 | if (ret) { | |
1326 | if (ret != -ENOSPC) | |
1327 | mlog_errno(ret); | |
1328 | goto out; | |
1329 | } | |
1330 | ||
1331 | next: | |
1332 | cpos += alloc_size; | |
1333 | clusters -= alloc_size; | |
1334 | } | |
1335 | ||
1336 | ret = 0; | |
1337 | out: | |
1afc32b9 MF |
1338 | |
1339 | brelse(di_bh); | |
2ae99a60 MF |
1340 | return ret; |
1341 | } | |
1342 | ||
063c4561 MF |
1343 | /* |
1344 | * Truncate a byte range, avoiding pages within partial clusters. This | |
1345 | * preserves those pages for the zeroing code to write to. | |
1346 | */ | |
1347 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, | |
1348 | u64 byte_len) | |
1349 | { | |
1350 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1351 | loff_t start, end; | |
1352 | struct address_space *mapping = inode->i_mapping; | |
1353 | ||
1354 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); | |
1355 | end = byte_start + byte_len; | |
1356 | end = end & ~(osb->s_clustersize - 1); | |
1357 | ||
1358 | if (start < end) { | |
1359 | unmap_mapping_range(mapping, start, end - start, 0); | |
1360 | truncate_inode_pages_range(mapping, start, end - 1); | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | static int ocfs2_zero_partial_clusters(struct inode *inode, | |
1365 | u64 start, u64 len) | |
1366 | { | |
1367 | int ret = 0; | |
1368 | u64 tmpend, end = start + len; | |
1369 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1370 | unsigned int csize = osb->s_clustersize; | |
1371 | handle_t *handle; | |
1372 | ||
1373 | /* | |
1374 | * The "start" and "end" values are NOT necessarily part of | |
1375 | * the range whose allocation is being deleted. Rather, this | |
1376 | * is what the user passed in with the request. We must zero | |
1377 | * partial clusters here. There's no need to worry about | |
1378 | * physical allocation - the zeroing code knows to skip holes. | |
1379 | */ | |
1380 | mlog(0, "byte start: %llu, end: %llu\n", | |
1381 | (unsigned long long)start, (unsigned long long)end); | |
1382 | ||
1383 | /* | |
1384 | * If both edges are on a cluster boundary then there's no | |
1385 | * zeroing required as the region is part of the allocation to | |
1386 | * be truncated. | |
1387 | */ | |
1388 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) | |
1389 | goto out; | |
1390 | ||
1391 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
1392 | if (IS_ERR(handle)) { |
1393 | ret = PTR_ERR(handle); | |
063c4561 MF |
1394 | mlog_errno(ret); |
1395 | goto out; | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * We want to get the byte offset of the end of the 1st cluster. | |
1400 | */ | |
1401 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); | |
1402 | if (tmpend > end) | |
1403 | tmpend = end; | |
1404 | ||
1405 | mlog(0, "1st range: start: %llu, tmpend: %llu\n", | |
1406 | (unsigned long long)start, (unsigned long long)tmpend); | |
1407 | ||
1408 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); | |
1409 | if (ret) | |
1410 | mlog_errno(ret); | |
1411 | ||
1412 | if (tmpend < end) { | |
1413 | /* | |
1414 | * This may make start and end equal, but the zeroing | |
1415 | * code will skip any work in that case so there's no | |
1416 | * need to catch it up here. | |
1417 | */ | |
1418 | start = end & ~(osb->s_clustersize - 1); | |
1419 | ||
1420 | mlog(0, "2nd range: start: %llu, end: %llu\n", | |
1421 | (unsigned long long)start, (unsigned long long)end); | |
1422 | ||
1423 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); | |
1424 | if (ret) | |
1425 | mlog_errno(ret); | |
1426 | } | |
1427 | ||
1428 | ocfs2_commit_trans(osb, handle); | |
1429 | out: | |
1430 | return ret; | |
1431 | } | |
1432 | ||
1433 | static int ocfs2_remove_inode_range(struct inode *inode, | |
1434 | struct buffer_head *di_bh, u64 byte_start, | |
1435 | u64 byte_len) | |
1436 | { | |
1437 | int ret = 0; | |
1438 | u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size; | |
1439 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1440 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
b1967d0e | 1441 | struct address_space *mapping = inode->i_mapping; |
fecc0112 | 1442 | struct ocfs2_extent_tree et; |
063c4561 | 1443 | |
5e404e9e | 1444 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
063c4561 MF |
1445 | ocfs2_init_dealloc_ctxt(&dealloc); |
1446 | ||
1447 | if (byte_len == 0) | |
1448 | return 0; | |
1449 | ||
1afc32b9 MF |
1450 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
1451 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, | |
b1967d0e MF |
1452 | byte_start + byte_len, 0); |
1453 | if (ret) { | |
1afc32b9 | 1454 | mlog_errno(ret); |
b1967d0e MF |
1455 | goto out; |
1456 | } | |
1457 | /* | |
1458 | * There's no need to get fancy with the page cache | |
1459 | * truncate of an inline-data inode. We're talking | |
1460 | * about less than a page here, which will be cached | |
1461 | * in the dinode buffer anyway. | |
1462 | */ | |
1463 | unmap_mapping_range(mapping, 0, 0, 0); | |
1464 | truncate_inode_pages(mapping, 0); | |
1465 | goto out; | |
1afc32b9 MF |
1466 | } |
1467 | ||
063c4561 MF |
1468 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
1469 | trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits; | |
1470 | if (trunc_len >= trunc_start) | |
1471 | trunc_len -= trunc_start; | |
1472 | else | |
1473 | trunc_len = 0; | |
1474 | ||
1475 | mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n", | |
1476 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1477 | (unsigned long long)byte_start, | |
1478 | (unsigned long long)byte_len, trunc_start, trunc_len); | |
1479 | ||
1480 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); | |
1481 | if (ret) { | |
1482 | mlog_errno(ret); | |
1483 | goto out; | |
1484 | } | |
1485 | ||
1486 | cpos = trunc_start; | |
1487 | while (trunc_len) { | |
1488 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1489 | &alloc_size, NULL); | |
1490 | if (ret) { | |
1491 | mlog_errno(ret); | |
1492 | goto out; | |
1493 | } | |
1494 | ||
1495 | if (alloc_size > trunc_len) | |
1496 | alloc_size = trunc_len; | |
1497 | ||
1498 | /* Only do work for non-holes */ | |
1499 | if (phys_cpos != 0) { | |
fecc0112 MF |
1500 | ret = ocfs2_remove_btree_range(inode, &et, cpos, |
1501 | phys_cpos, alloc_size, | |
1502 | &dealloc); | |
063c4561 MF |
1503 | if (ret) { |
1504 | mlog_errno(ret); | |
1505 | goto out; | |
1506 | } | |
1507 | } | |
1508 | ||
1509 | cpos += alloc_size; | |
1510 | trunc_len -= alloc_size; | |
1511 | } | |
1512 | ||
1513 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); | |
1514 | ||
1515 | out: | |
1516 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
1517 | ocfs2_run_deallocs(osb, &dealloc); | |
1518 | ||
1519 | return ret; | |
1520 | } | |
1521 | ||
b2580103 MF |
1522 | /* |
1523 | * Parts of this function taken from xfs_change_file_space() | |
1524 | */ | |
385820a3 MF |
1525 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
1526 | loff_t f_pos, unsigned int cmd, | |
1527 | struct ocfs2_space_resv *sr, | |
1528 | int change_size) | |
b2580103 MF |
1529 | { |
1530 | int ret; | |
1531 | s64 llen; | |
385820a3 | 1532 | loff_t size; |
b2580103 MF |
1533 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1534 | struct buffer_head *di_bh = NULL; | |
1535 | handle_t *handle; | |
a00cce35 | 1536 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
b2580103 | 1537 | |
b2580103 MF |
1538 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
1539 | return -EROFS; | |
1540 | ||
1541 | mutex_lock(&inode->i_mutex); | |
1542 | ||
1543 | /* | |
1544 | * This prevents concurrent writes on other nodes | |
1545 | */ | |
1546 | ret = ocfs2_rw_lock(inode, 1); | |
1547 | if (ret) { | |
1548 | mlog_errno(ret); | |
1549 | goto out; | |
1550 | } | |
1551 | ||
e63aecb6 | 1552 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
b2580103 MF |
1553 | if (ret) { |
1554 | mlog_errno(ret); | |
1555 | goto out_rw_unlock; | |
1556 | } | |
1557 | ||
1558 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { | |
1559 | ret = -EPERM; | |
e63aecb6 | 1560 | goto out_inode_unlock; |
b2580103 MF |
1561 | } |
1562 | ||
1563 | switch (sr->l_whence) { | |
1564 | case 0: /*SEEK_SET*/ | |
1565 | break; | |
1566 | case 1: /*SEEK_CUR*/ | |
385820a3 | 1567 | sr->l_start += f_pos; |
b2580103 MF |
1568 | break; |
1569 | case 2: /*SEEK_END*/ | |
1570 | sr->l_start += i_size_read(inode); | |
1571 | break; | |
1572 | default: | |
1573 | ret = -EINVAL; | |
e63aecb6 | 1574 | goto out_inode_unlock; |
b2580103 MF |
1575 | } |
1576 | sr->l_whence = 0; | |
1577 | ||
1578 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; | |
1579 | ||
1580 | if (sr->l_start < 0 | |
1581 | || sr->l_start > max_off | |
1582 | || (sr->l_start + llen) < 0 | |
1583 | || (sr->l_start + llen) > max_off) { | |
1584 | ret = -EINVAL; | |
e63aecb6 | 1585 | goto out_inode_unlock; |
b2580103 | 1586 | } |
385820a3 | 1587 | size = sr->l_start + sr->l_len; |
b2580103 MF |
1588 | |
1589 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) { | |
1590 | if (sr->l_len <= 0) { | |
1591 | ret = -EINVAL; | |
e63aecb6 | 1592 | goto out_inode_unlock; |
b2580103 MF |
1593 | } |
1594 | } | |
1595 | ||
385820a3 | 1596 | if (file && should_remove_suid(file->f_path.dentry)) { |
b2580103 MF |
1597 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
1598 | if (ret) { | |
1599 | mlog_errno(ret); | |
e63aecb6 | 1600 | goto out_inode_unlock; |
b2580103 MF |
1601 | } |
1602 | } | |
1603 | ||
1604 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1605 | switch (cmd) { | |
1606 | case OCFS2_IOC_RESVSP: | |
1607 | case OCFS2_IOC_RESVSP64: | |
1608 | /* | |
1609 | * This takes unsigned offsets, but the signed ones we | |
1610 | * pass have been checked against overflow above. | |
1611 | */ | |
1612 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, | |
1613 | sr->l_len); | |
1614 | break; | |
1615 | case OCFS2_IOC_UNRESVSP: | |
1616 | case OCFS2_IOC_UNRESVSP64: | |
1617 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, | |
1618 | sr->l_len); | |
1619 | break; | |
1620 | default: | |
1621 | ret = -EINVAL; | |
1622 | } | |
1623 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1624 | if (ret) { | |
1625 | mlog_errno(ret); | |
e63aecb6 | 1626 | goto out_inode_unlock; |
b2580103 MF |
1627 | } |
1628 | ||
1629 | /* | |
1630 | * We update c/mtime for these changes | |
1631 | */ | |
1632 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1633 | if (IS_ERR(handle)) { | |
1634 | ret = PTR_ERR(handle); | |
1635 | mlog_errno(ret); | |
e63aecb6 | 1636 | goto out_inode_unlock; |
b2580103 MF |
1637 | } |
1638 | ||
385820a3 MF |
1639 | if (change_size && i_size_read(inode) < size) |
1640 | i_size_write(inode, size); | |
1641 | ||
b2580103 MF |
1642 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
1643 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); | |
1644 | if (ret < 0) | |
1645 | mlog_errno(ret); | |
1646 | ||
1647 | ocfs2_commit_trans(osb, handle); | |
1648 | ||
e63aecb6 | 1649 | out_inode_unlock: |
b2580103 | 1650 | brelse(di_bh); |
e63aecb6 | 1651 | ocfs2_inode_unlock(inode, 1); |
b2580103 MF |
1652 | out_rw_unlock: |
1653 | ocfs2_rw_unlock(inode, 1); | |
1654 | ||
b2580103 | 1655 | out: |
c259ae52 | 1656 | mutex_unlock(&inode->i_mutex); |
b2580103 MF |
1657 | return ret; |
1658 | } | |
1659 | ||
385820a3 MF |
1660 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
1661 | struct ocfs2_space_resv *sr) | |
1662 | { | |
1663 | struct inode *inode = file->f_path.dentry->d_inode; | |
c19a28e1 | 1664 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
385820a3 MF |
1665 | |
1666 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && | |
1667 | !ocfs2_writes_unwritten_extents(osb)) | |
1668 | return -ENOTTY; | |
1669 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && | |
1670 | !ocfs2_sparse_alloc(osb)) | |
1671 | return -ENOTTY; | |
1672 | ||
1673 | if (!S_ISREG(inode->i_mode)) | |
1674 | return -EINVAL; | |
1675 | ||
1676 | if (!(file->f_mode & FMODE_WRITE)) | |
1677 | return -EBADF; | |
1678 | ||
1679 | return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); | |
1680 | } | |
1681 | ||
1682 | static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset, | |
1683 | loff_t len) | |
1684 | { | |
1685 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1686 | struct ocfs2_space_resv sr; | |
1687 | int change_size = 1; | |
1688 | ||
1689 | if (!ocfs2_writes_unwritten_extents(osb)) | |
1690 | return -EOPNOTSUPP; | |
1691 | ||
1692 | if (S_ISDIR(inode->i_mode)) | |
1693 | return -ENODEV; | |
1694 | ||
1695 | if (mode & FALLOC_FL_KEEP_SIZE) | |
1696 | change_size = 0; | |
1697 | ||
1698 | sr.l_whence = 0; | |
1699 | sr.l_start = (s64)offset; | |
1700 | sr.l_len = (s64)len; | |
1701 | ||
1702 | return __ocfs2_change_file_space(NULL, inode, offset, | |
1703 | OCFS2_IOC_RESVSP64, &sr, change_size); | |
1704 | } | |
1705 | ||
293b2f70 TM |
1706 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
1707 | size_t count) | |
1708 | { | |
1709 | int ret = 0; | |
1710 | unsigned int extent_flags; | |
1711 | u32 cpos, clusters, extent_len, phys_cpos; | |
1712 | struct super_block *sb = inode->i_sb; | |
1713 | ||
1714 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || | |
2f48d593 TM |
1715 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
1716 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) | |
293b2f70 TM |
1717 | return 0; |
1718 | ||
1719 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
1720 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
1721 | ||
1722 | while (clusters) { | |
1723 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, | |
1724 | &extent_flags); | |
1725 | if (ret < 0) { | |
1726 | mlog_errno(ret); | |
1727 | goto out; | |
1728 | } | |
1729 | ||
1730 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { | |
1731 | ret = 1; | |
1732 | break; | |
1733 | } | |
1734 | ||
1735 | if (extent_len > clusters) | |
1736 | extent_len = clusters; | |
1737 | ||
1738 | clusters -= extent_len; | |
1739 | cpos += extent_len; | |
1740 | } | |
1741 | out: | |
1742 | return ret; | |
1743 | } | |
1744 | ||
1745 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, | |
1746 | loff_t pos, size_t count, | |
1747 | int *meta_level) | |
1748 | { | |
1749 | int ret; | |
1750 | struct buffer_head *di_bh = NULL; | |
1751 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1752 | u32 clusters = | |
1753 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; | |
1754 | ||
1755 | ret = ocfs2_inode_lock(inode, &di_bh, 1); | |
1756 | if (ret) { | |
1757 | mlog_errno(ret); | |
1758 | goto out; | |
1759 | } | |
1760 | ||
1761 | *meta_level = 1; | |
1762 | ||
37f8a2bf | 1763 | ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX); |
293b2f70 TM |
1764 | if (ret) |
1765 | mlog_errno(ret); | |
1766 | out: | |
1767 | brelse(di_bh); | |
1768 | return ret; | |
1769 | } | |
1770 | ||
8659ac25 TY |
1771 | static int ocfs2_prepare_inode_for_write(struct dentry *dentry, |
1772 | loff_t *ppos, | |
1773 | size_t count, | |
9517bac6 MF |
1774 | int appending, |
1775 | int *direct_io) | |
ccd979bd | 1776 | { |
65ed39d6 | 1777 | int ret = 0, meta_level = 0; |
8659ac25 | 1778 | struct inode *inode = dentry->d_inode; |
65ed39d6 | 1779 | loff_t saved_pos, end; |
ccd979bd | 1780 | |
ccd979bd | 1781 | /* |
65ed39d6 MF |
1782 | * We start with a read level meta lock and only jump to an ex |
1783 | * if we need to make modifications here. | |
ccd979bd | 1784 | */ |
ccd979bd | 1785 | for(;;) { |
e63aecb6 | 1786 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
ccd979bd MF |
1787 | if (ret < 0) { |
1788 | meta_level = -1; | |
1789 | mlog_errno(ret); | |
1790 | goto out; | |
1791 | } | |
1792 | ||
1793 | /* Clear suid / sgid if necessary. We do this here | |
1794 | * instead of later in the write path because | |
1795 | * remove_suid() calls ->setattr without any hint that | |
1796 | * we may have already done our cluster locking. Since | |
1797 | * ocfs2_setattr() *must* take cluster locks to | |
1798 | * proceeed, this will lead us to recursively lock the | |
1799 | * inode. There's also the dinode i_size state which | |
1800 | * can be lost via setattr during extending writes (we | |
1801 | * set inode->i_size at the end of a write. */ | |
8659ac25 | 1802 | if (should_remove_suid(dentry)) { |
ccd979bd | 1803 | if (meta_level == 0) { |
e63aecb6 | 1804 | ocfs2_inode_unlock(inode, meta_level); |
ccd979bd MF |
1805 | meta_level = 1; |
1806 | continue; | |
1807 | } | |
1808 | ||
1809 | ret = ocfs2_write_remove_suid(inode); | |
1810 | if (ret < 0) { | |
1811 | mlog_errno(ret); | |
8659ac25 | 1812 | goto out_unlock; |
ccd979bd MF |
1813 | } |
1814 | } | |
1815 | ||
1816 | /* work on a copy of ppos until we're sure that we won't have | |
1817 | * to recalculate it due to relocking. */ | |
8659ac25 | 1818 | if (appending) { |
ccd979bd MF |
1819 | saved_pos = i_size_read(inode); |
1820 | mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos); | |
1821 | } else { | |
8659ac25 | 1822 | saved_pos = *ppos; |
ccd979bd | 1823 | } |
3a0782d0 | 1824 | |
65ed39d6 | 1825 | end = saved_pos + count; |
9517bac6 | 1826 | |
293b2f70 TM |
1827 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
1828 | if (ret == 1) { | |
1829 | ocfs2_inode_unlock(inode, meta_level); | |
1830 | meta_level = -1; | |
1831 | ||
1832 | ret = ocfs2_prepare_inode_for_refcount(inode, | |
1833 | saved_pos, | |
1834 | count, | |
1835 | &meta_level); | |
1836 | } | |
1837 | ||
1838 | if (ret < 0) { | |
1839 | mlog_errno(ret); | |
1840 | goto out_unlock; | |
1841 | } | |
1842 | ||
65ed39d6 MF |
1843 | /* |
1844 | * Skip the O_DIRECT checks if we don't need | |
1845 | * them. | |
1846 | */ | |
1847 | if (!direct_io || !(*direct_io)) | |
9517bac6 | 1848 | break; |
9517bac6 | 1849 | |
1afc32b9 MF |
1850 | /* |
1851 | * There's no sane way to do direct writes to an inode | |
1852 | * with inline data. | |
1853 | */ | |
1854 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1855 | *direct_io = 0; | |
1856 | break; | |
1857 | } | |
1858 | ||
3a0782d0 | 1859 | /* |
65ed39d6 MF |
1860 | * Allowing concurrent direct writes means |
1861 | * i_size changes wouldn't be synchronized, so | |
1862 | * one node could wind up truncating another | |
1863 | * nodes writes. | |
3a0782d0 | 1864 | */ |
65ed39d6 MF |
1865 | if (end > i_size_read(inode)) { |
1866 | *direct_io = 0; | |
ccd979bd | 1867 | break; |
ccd979bd MF |
1868 | } |
1869 | ||
65ed39d6 MF |
1870 | /* |
1871 | * We don't fill holes during direct io, so | |
1872 | * check for them here. If any are found, the | |
1873 | * caller will have to retake some cluster | |
1874 | * locks and initiate the io as buffered. | |
1875 | */ | |
1876 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); | |
1877 | if (ret == 1) { | |
1878 | *direct_io = 0; | |
1879 | ret = 0; | |
1880 | } else if (ret < 0) | |
1881 | mlog_errno(ret); | |
ccd979bd MF |
1882 | break; |
1883 | } | |
1884 | ||
8659ac25 TY |
1885 | if (appending) |
1886 | *ppos = saved_pos; | |
1887 | ||
1888 | out_unlock: | |
293b2f70 TM |
1889 | if (meta_level >= 0) |
1890 | ocfs2_inode_unlock(inode, meta_level); | |
8659ac25 TY |
1891 | |
1892 | out: | |
1893 | return ret; | |
1894 | } | |
1895 | ||
1896 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, | |
1897 | const struct iovec *iov, | |
1898 | unsigned long nr_segs, | |
1899 | loff_t pos) | |
1900 | { | |
9517bac6 | 1901 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
b6af1bcd | 1902 | int can_do_direct; |
9517bac6 MF |
1903 | ssize_t written = 0; |
1904 | size_t ocount; /* original count */ | |
1905 | size_t count; /* after file limit checks */ | |
9ea2d32f MF |
1906 | loff_t old_size, *ppos = &iocb->ki_pos; |
1907 | u32 old_clusters; | |
9517bac6 MF |
1908 | struct file *file = iocb->ki_filp; |
1909 | struct inode *inode = file->f_path.dentry->d_inode; | |
9ea2d32f | 1910 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
9517bac6 MF |
1911 | |
1912 | mlog_entry("(0x%p, %u, '%.*s')\n", file, | |
8659ac25 | 1913 | (unsigned int)nr_segs, |
9517bac6 MF |
1914 | file->f_path.dentry->d_name.len, |
1915 | file->f_path.dentry->d_name.name); | |
8659ac25 | 1916 | |
8659ac25 TY |
1917 | if (iocb->ki_left == 0) |
1918 | return 0; | |
1919 | ||
9517bac6 MF |
1920 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
1921 | ||
1922 | appending = file->f_flags & O_APPEND ? 1 : 0; | |
1923 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; | |
1924 | ||
8659ac25 | 1925 | mutex_lock(&inode->i_mutex); |
9517bac6 MF |
1926 | |
1927 | relock: | |
8659ac25 | 1928 | /* to match setattr's i_mutex -> i_alloc_sem -> rw_lock ordering */ |
9517bac6 | 1929 | if (direct_io) { |
8659ac25 | 1930 | down_read(&inode->i_alloc_sem); |
9517bac6 | 1931 | have_alloc_sem = 1; |
8659ac25 TY |
1932 | } |
1933 | ||
1934 | /* concurrent O_DIRECT writes are allowed */ | |
9517bac6 | 1935 | rw_level = !direct_io; |
8659ac25 TY |
1936 | ret = ocfs2_rw_lock(inode, rw_level); |
1937 | if (ret < 0) { | |
8659ac25 | 1938 | mlog_errno(ret); |
9517bac6 | 1939 | goto out_sems; |
8659ac25 TY |
1940 | } |
1941 | ||
9517bac6 MF |
1942 | can_do_direct = direct_io; |
1943 | ret = ocfs2_prepare_inode_for_write(file->f_path.dentry, ppos, | |
1944 | iocb->ki_left, appending, | |
1945 | &can_do_direct); | |
8659ac25 TY |
1946 | if (ret < 0) { |
1947 | mlog_errno(ret); | |
1948 | goto out; | |
1949 | } | |
ccd979bd | 1950 | |
9517bac6 MF |
1951 | /* |
1952 | * We can't complete the direct I/O as requested, fall back to | |
1953 | * buffered I/O. | |
1954 | */ | |
1955 | if (direct_io && !can_do_direct) { | |
1956 | ocfs2_rw_unlock(inode, rw_level); | |
1957 | up_read(&inode->i_alloc_sem); | |
1958 | ||
1959 | have_alloc_sem = 0; | |
1960 | rw_level = -1; | |
1961 | ||
1962 | direct_io = 0; | |
9517bac6 MF |
1963 | goto relock; |
1964 | } | |
1965 | ||
9ea2d32f MF |
1966 | /* |
1967 | * To later detect whether a journal commit for sync writes is | |
1968 | * necessary, we sample i_size, and cluster count here. | |
1969 | */ | |
1970 | old_size = i_size_read(inode); | |
1971 | old_clusters = OCFS2_I(inode)->ip_clusters; | |
1972 | ||
ccd979bd | 1973 | /* communicate with ocfs2_dio_end_io */ |
7cdfc3a1 | 1974 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd | 1975 | |
9517bac6 | 1976 | if (direct_io) { |
b6af1bcd NP |
1977 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
1978 | VERIFY_READ); | |
1979 | if (ret) | |
1980 | goto out_dio; | |
1981 | ||
cefcb800 | 1982 | count = ocount; |
b6af1bcd NP |
1983 | ret = generic_write_checks(file, ppos, &count, |
1984 | S_ISBLK(inode->i_mode)); | |
1985 | if (ret) | |
1986 | goto out_dio; | |
1987 | ||
9517bac6 MF |
1988 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
1989 | ppos, count, ocount); | |
1990 | if (written < 0) { | |
c4354001 DM |
1991 | /* |
1992 | * direct write may have instantiated a few | |
1993 | * blocks outside i_size. Trim these off again. | |
1994 | * Don't need i_size_read because we hold i_mutex. | |
1995 | */ | |
1996 | if (*ppos + count > inode->i_size) | |
1997 | vmtruncate(inode, inode->i_size); | |
9517bac6 MF |
1998 | ret = written; |
1999 | goto out_dio; | |
2000 | } | |
2001 | } else { | |
918941a3 | 2002 | written = __generic_file_aio_write(iocb, iov, nr_segs, ppos); |
9517bac6 | 2003 | } |
ccd979bd | 2004 | |
9517bac6 | 2005 | out_dio: |
ccd979bd | 2006 | /* buffered aio wouldn't have proper lock coverage today */ |
9517bac6 | 2007 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
ccd979bd | 2008 | |
6b2f3d1f | 2009 | if ((file->f_flags & O_DSYNC && !direct_io) || IS_SYNC(inode)) { |
918941a3 JK |
2010 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
2011 | pos + count - 1); | |
2012 | if (ret < 0) | |
2013 | written = ret; | |
2014 | ||
2015 | if (!ret && (old_size != i_size_read(inode) || | |
2016 | old_clusters != OCFS2_I(inode)->ip_clusters)) { | |
2b4e30fb | 2017 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
9ea2d32f MF |
2018 | if (ret < 0) |
2019 | written = ret; | |
2020 | } | |
918941a3 JK |
2021 | |
2022 | if (!ret) | |
2023 | ret = filemap_fdatawait_range(file->f_mapping, pos, | |
2024 | pos + count - 1); | |
9ea2d32f MF |
2025 | } |
2026 | ||
ccd979bd MF |
2027 | /* |
2028 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io | |
2029 | * function pointer which is called when o_direct io completes so that | |
2030 | * it can unlock our rw lock. (it's the clustered equivalent of | |
2031 | * i_alloc_sem; protects truncate from racing with pending ios). | |
2032 | * Unfortunately there are error cases which call end_io and others | |
2033 | * that don't. so we don't have to unlock the rw_lock if either an | |
2034 | * async dio is going to do it in the future or an end_io after an | |
2035 | * error has already done it. | |
2036 | */ | |
2037 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { | |
2038 | rw_level = -1; | |
2039 | have_alloc_sem = 0; | |
2040 | } | |
2041 | ||
2042 | out: | |
9517bac6 MF |
2043 | if (rw_level != -1) |
2044 | ocfs2_rw_unlock(inode, rw_level); | |
2045 | ||
2046 | out_sems: | |
ccd979bd MF |
2047 | if (have_alloc_sem) |
2048 | up_read(&inode->i_alloc_sem); | |
9517bac6 | 2049 | |
1b1dcc1b | 2050 | mutex_unlock(&inode->i_mutex); |
ccd979bd | 2051 | |
812e7a6a WW |
2052 | if (written) |
2053 | ret = written; | |
ccd979bd | 2054 | mlog_exit(ret); |
812e7a6a | 2055 | return ret; |
ccd979bd MF |
2056 | } |
2057 | ||
328eaaba MS |
2058 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
2059 | struct file *out, | |
2060 | struct splice_desc *sd) | |
2061 | { | |
2062 | int ret; | |
2063 | ||
2064 | ret = ocfs2_prepare_inode_for_write(out->f_path.dentry, &sd->pos, | |
2065 | sd->total_len, 0, NULL); | |
2066 | if (ret < 0) { | |
2067 | mlog_errno(ret); | |
2068 | return ret; | |
2069 | } | |
2070 | ||
2071 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); | |
2072 | } | |
2073 | ||
8659ac25 TY |
2074 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
2075 | struct file *out, | |
2076 | loff_t *ppos, | |
2077 | size_t len, | |
2078 | unsigned int flags) | |
2079 | { | |
2080 | int ret; | |
328eaaba MS |
2081 | struct address_space *mapping = out->f_mapping; |
2082 | struct inode *inode = mapping->host; | |
2083 | struct splice_desc sd = { | |
2084 | .total_len = len, | |
2085 | .flags = flags, | |
2086 | .pos = *ppos, | |
2087 | .u.file = out, | |
2088 | }; | |
8659ac25 TY |
2089 | |
2090 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", out, pipe, | |
2091 | (unsigned int)len, | |
d28c9174 JS |
2092 | out->f_path.dentry->d_name.len, |
2093 | out->f_path.dentry->d_name.name); | |
8659ac25 | 2094 | |
328eaaba MS |
2095 | if (pipe->inode) |
2096 | mutex_lock_nested(&pipe->inode->i_mutex, I_MUTEX_PARENT); | |
8659ac25 | 2097 | |
328eaaba MS |
2098 | splice_from_pipe_begin(&sd); |
2099 | do { | |
2100 | ret = splice_from_pipe_next(pipe, &sd); | |
2101 | if (ret <= 0) | |
2102 | break; | |
8659ac25 | 2103 | |
328eaaba MS |
2104 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
2105 | ret = ocfs2_rw_lock(inode, 1); | |
2106 | if (ret < 0) | |
2107 | mlog_errno(ret); | |
2108 | else { | |
2109 | ret = ocfs2_splice_to_file(pipe, out, &sd); | |
2110 | ocfs2_rw_unlock(inode, 1); | |
2111 | } | |
2112 | mutex_unlock(&inode->i_mutex); | |
2113 | } while (ret > 0); | |
2114 | splice_from_pipe_end(pipe, &sd); | |
8659ac25 | 2115 | |
7bfac9ec MS |
2116 | if (pipe->inode) |
2117 | mutex_unlock(&pipe->inode->i_mutex); | |
8659ac25 | 2118 | |
328eaaba MS |
2119 | if (sd.num_spliced) |
2120 | ret = sd.num_spliced; | |
2121 | ||
2122 | if (ret > 0) { | |
2123 | unsigned long nr_pages; | |
d23c937b | 2124 | int err; |
328eaaba | 2125 | |
328eaaba MS |
2126 | nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
2127 | ||
d23c937b JK |
2128 | err = generic_write_sync(out, *ppos, ret); |
2129 | if (err) | |
2130 | ret = err; | |
2131 | else | |
2132 | *ppos += ret; | |
328eaaba | 2133 | |
328eaaba MS |
2134 | balance_dirty_pages_ratelimited_nr(mapping, nr_pages); |
2135 | } | |
8659ac25 TY |
2136 | |
2137 | mlog_exit(ret); | |
2138 | return ret; | |
2139 | } | |
2140 | ||
2141 | static ssize_t ocfs2_file_splice_read(struct file *in, | |
2142 | loff_t *ppos, | |
2143 | struct pipe_inode_info *pipe, | |
2144 | size_t len, | |
2145 | unsigned int flags) | |
2146 | { | |
1962f39a | 2147 | int ret = 0, lock_level = 0; |
d28c9174 | 2148 | struct inode *inode = in->f_path.dentry->d_inode; |
8659ac25 TY |
2149 | |
2150 | mlog_entry("(0x%p, 0x%p, %u, '%.*s')\n", in, pipe, | |
2151 | (unsigned int)len, | |
d28c9174 JS |
2152 | in->f_path.dentry->d_name.len, |
2153 | in->f_path.dentry->d_name.name); | |
8659ac25 TY |
2154 | |
2155 | /* | |
2156 | * See the comment in ocfs2_file_aio_read() | |
2157 | */ | |
1962f39a | 2158 | ret = ocfs2_inode_lock_atime(inode, in->f_vfsmnt, &lock_level); |
8659ac25 TY |
2159 | if (ret < 0) { |
2160 | mlog_errno(ret); | |
2161 | goto bail; | |
2162 | } | |
1962f39a | 2163 | ocfs2_inode_unlock(inode, lock_level); |
8659ac25 TY |
2164 | |
2165 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); | |
2166 | ||
2167 | bail: | |
2168 | mlog_exit(ret); | |
2169 | return ret; | |
2170 | } | |
2171 | ||
ccd979bd | 2172 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
027445c3 BP |
2173 | const struct iovec *iov, |
2174 | unsigned long nr_segs, | |
ccd979bd MF |
2175 | loff_t pos) |
2176 | { | |
25899dee | 2177 | int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0; |
ccd979bd | 2178 | struct file *filp = iocb->ki_filp; |
d28c9174 | 2179 | struct inode *inode = filp->f_path.dentry->d_inode; |
ccd979bd | 2180 | |
027445c3 BP |
2181 | mlog_entry("(0x%p, %u, '%.*s')\n", filp, |
2182 | (unsigned int)nr_segs, | |
d28c9174 JS |
2183 | filp->f_path.dentry->d_name.len, |
2184 | filp->f_path.dentry->d_name.name); | |
ccd979bd MF |
2185 | |
2186 | if (!inode) { | |
2187 | ret = -EINVAL; | |
2188 | mlog_errno(ret); | |
2189 | goto bail; | |
2190 | } | |
2191 | ||
ccd979bd MF |
2192 | /* |
2193 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads | |
2194 | * need locks to protect pending reads from racing with truncate. | |
2195 | */ | |
2196 | if (filp->f_flags & O_DIRECT) { | |
2197 | down_read(&inode->i_alloc_sem); | |
2198 | have_alloc_sem = 1; | |
2199 | ||
2200 | ret = ocfs2_rw_lock(inode, 0); | |
2201 | if (ret < 0) { | |
2202 | mlog_errno(ret); | |
2203 | goto bail; | |
2204 | } | |
2205 | rw_level = 0; | |
2206 | /* communicate with ocfs2_dio_end_io */ | |
7cdfc3a1 | 2207 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd MF |
2208 | } |
2209 | ||
c4374f8a MF |
2210 | /* |
2211 | * We're fine letting folks race truncates and extending | |
2212 | * writes with read across the cluster, just like they can | |
2213 | * locally. Hence no rw_lock during read. | |
2214 | * | |
2215 | * Take and drop the meta data lock to update inode fields | |
2216 | * like i_size. This allows the checks down below | |
2217 | * generic_file_aio_read() a chance of actually working. | |
2218 | */ | |
e63aecb6 | 2219 | ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level); |
c4374f8a MF |
2220 | if (ret < 0) { |
2221 | mlog_errno(ret); | |
2222 | goto bail; | |
2223 | } | |
e63aecb6 | 2224 | ocfs2_inode_unlock(inode, lock_level); |
c4374f8a | 2225 | |
027445c3 | 2226 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
ccd979bd | 2227 | if (ret == -EINVAL) |
56753bd3 | 2228 | mlog(0, "generic_file_aio_read returned -EINVAL\n"); |
ccd979bd MF |
2229 | |
2230 | /* buffered aio wouldn't have proper lock coverage today */ | |
2231 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); | |
2232 | ||
2233 | /* see ocfs2_file_aio_write */ | |
2234 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { | |
2235 | rw_level = -1; | |
2236 | have_alloc_sem = 0; | |
2237 | } | |
2238 | ||
2239 | bail: | |
2240 | if (have_alloc_sem) | |
2241 | up_read(&inode->i_alloc_sem); | |
2242 | if (rw_level != -1) | |
2243 | ocfs2_rw_unlock(inode, rw_level); | |
2244 | mlog_exit(ret); | |
2245 | ||
2246 | return ret; | |
2247 | } | |
2248 | ||
92e1d5be | 2249 | const struct inode_operations ocfs2_file_iops = { |
ccd979bd MF |
2250 | .setattr = ocfs2_setattr, |
2251 | .getattr = ocfs2_getattr, | |
d38eb8db | 2252 | .permission = ocfs2_permission, |
cf1d6c76 TY |
2253 | .setxattr = generic_setxattr, |
2254 | .getxattr = generic_getxattr, | |
2255 | .listxattr = ocfs2_listxattr, | |
2256 | .removexattr = generic_removexattr, | |
385820a3 | 2257 | .fallocate = ocfs2_fallocate, |
00dc417f | 2258 | .fiemap = ocfs2_fiemap, |
ccd979bd MF |
2259 | }; |
2260 | ||
92e1d5be | 2261 | const struct inode_operations ocfs2_special_file_iops = { |
ccd979bd MF |
2262 | .setattr = ocfs2_setattr, |
2263 | .getattr = ocfs2_getattr, | |
d38eb8db | 2264 | .permission = ocfs2_permission, |
ccd979bd MF |
2265 | }; |
2266 | ||
53da4939 MF |
2267 | /* |
2268 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with | |
2269 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! | |
2270 | */ | |
4b6f5d20 | 2271 | const struct file_operations ocfs2_fops = { |
32c3c0e2 | 2272 | .llseek = generic_file_llseek, |
ccd979bd MF |
2273 | .read = do_sync_read, |
2274 | .write = do_sync_write, | |
ccd979bd MF |
2275 | .mmap = ocfs2_mmap, |
2276 | .fsync = ocfs2_sync_file, | |
2277 | .release = ocfs2_file_release, | |
2278 | .open = ocfs2_file_open, | |
2279 | .aio_read = ocfs2_file_aio_read, | |
2280 | .aio_write = ocfs2_file_aio_write, | |
c9ec1488 | 2281 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2282 | #ifdef CONFIG_COMPAT |
2283 | .compat_ioctl = ocfs2_compat_ioctl, | |
2284 | #endif | |
53da4939 | 2285 | .lock = ocfs2_lock, |
53fc622b | 2286 | .flock = ocfs2_flock, |
8659ac25 TY |
2287 | .splice_read = ocfs2_file_splice_read, |
2288 | .splice_write = ocfs2_file_splice_write, | |
ccd979bd MF |
2289 | }; |
2290 | ||
4b6f5d20 | 2291 | const struct file_operations ocfs2_dops = { |
32c3c0e2 | 2292 | .llseek = generic_file_llseek, |
ccd979bd MF |
2293 | .read = generic_read_dir, |
2294 | .readdir = ocfs2_readdir, | |
2295 | .fsync = ocfs2_sync_file, | |
53fc622b MF |
2296 | .release = ocfs2_dir_release, |
2297 | .open = ocfs2_dir_open, | |
c9ec1488 | 2298 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2299 | #ifdef CONFIG_COMPAT |
2300 | .compat_ioctl = ocfs2_compat_ioctl, | |
53da4939 MF |
2301 | #endif |
2302 | .lock = ocfs2_lock, | |
2303 | .flock = ocfs2_flock, | |
2304 | }; | |
2305 | ||
2306 | /* | |
2307 | * POSIX-lockless variants of our file_operations. | |
2308 | * | |
2309 | * These will be used if the underlying cluster stack does not support | |
2310 | * posix file locking, if the user passes the "localflocks" mount | |
2311 | * option, or if we have a local-only fs. | |
2312 | * | |
2313 | * ocfs2_flock is in here because all stacks handle UNIX file locks, | |
2314 | * so we still want it in the case of no stack support for | |
2315 | * plocks. Internally, it will do the right thing when asked to ignore | |
2316 | * the cluster. | |
2317 | */ | |
2318 | const struct file_operations ocfs2_fops_no_plocks = { | |
2319 | .llseek = generic_file_llseek, | |
2320 | .read = do_sync_read, | |
2321 | .write = do_sync_write, | |
2322 | .mmap = ocfs2_mmap, | |
2323 | .fsync = ocfs2_sync_file, | |
2324 | .release = ocfs2_file_release, | |
2325 | .open = ocfs2_file_open, | |
2326 | .aio_read = ocfs2_file_aio_read, | |
2327 | .aio_write = ocfs2_file_aio_write, | |
2328 | .unlocked_ioctl = ocfs2_ioctl, | |
2329 | #ifdef CONFIG_COMPAT | |
2330 | .compat_ioctl = ocfs2_compat_ioctl, | |
2331 | #endif | |
2332 | .flock = ocfs2_flock, | |
2333 | .splice_read = ocfs2_file_splice_read, | |
2334 | .splice_write = ocfs2_file_splice_write, | |
2335 | }; | |
2336 | ||
2337 | const struct file_operations ocfs2_dops_no_plocks = { | |
2338 | .llseek = generic_file_llseek, | |
2339 | .read = generic_read_dir, | |
2340 | .readdir = ocfs2_readdir, | |
2341 | .fsync = ocfs2_sync_file, | |
2342 | .release = ocfs2_dir_release, | |
2343 | .open = ocfs2_dir_open, | |
2344 | .unlocked_ioctl = ocfs2_ioctl, | |
2345 | #ifdef CONFIG_COMPAT | |
2346 | .compat_ioctl = ocfs2_compat_ioctl, | |
586d232b | 2347 | #endif |
53fc622b | 2348 | .flock = ocfs2_flock, |
ccd979bd | 2349 | }; |