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ccd979bd MF |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * file.c | |
5 | * | |
6 | * File open, close, extend, truncate | |
7 | * | |
8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public | |
21 | * License along with this program; if not, write to the | |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | * Boston, MA 021110-1307, USA. | |
24 | */ | |
25 | ||
16f7e0fe | 26 | #include <linux/capability.h> |
ccd979bd MF |
27 | #include <linux/fs.h> |
28 | #include <linux/types.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/highmem.h> | |
31 | #include <linux/pagemap.h> | |
32 | #include <linux/uio.h> | |
e2057c5a | 33 | #include <linux/sched.h> |
d6b29d7c | 34 | #include <linux/splice.h> |
7f1a37e3 | 35 | #include <linux/mount.h> |
9517bac6 | 36 | #include <linux/writeback.h> |
385820a3 | 37 | #include <linux/falloc.h> |
a90714c1 | 38 | #include <linux/quotaops.h> |
04eda1a1 | 39 | #include <linux/blkdev.h> |
ccd979bd | 40 | |
ccd979bd MF |
41 | #include <cluster/masklog.h> |
42 | ||
43 | #include "ocfs2.h" | |
44 | ||
45 | #include "alloc.h" | |
46 | #include "aops.h" | |
47 | #include "dir.h" | |
48 | #include "dlmglue.h" | |
49 | #include "extent_map.h" | |
50 | #include "file.h" | |
51 | #include "sysfile.h" | |
52 | #include "inode.h" | |
ca4d147e | 53 | #include "ioctl.h" |
ccd979bd | 54 | #include "journal.h" |
53fc622b | 55 | #include "locks.h" |
ccd979bd MF |
56 | #include "mmap.h" |
57 | #include "suballoc.h" | |
58 | #include "super.h" | |
cf1d6c76 | 59 | #include "xattr.h" |
23fc2702 | 60 | #include "acl.h" |
a90714c1 | 61 | #include "quota.h" |
293b2f70 | 62 | #include "refcounttree.h" |
468eedde | 63 | #include "ocfs2_trace.h" |
ccd979bd MF |
64 | |
65 | #include "buffer_head_io.h" | |
66 | ||
53fc622b MF |
67 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
68 | { | |
69 | struct ocfs2_file_private *fp; | |
70 | ||
71 | fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL); | |
72 | if (!fp) | |
73 | return -ENOMEM; | |
74 | ||
75 | fp->fp_file = file; | |
76 | mutex_init(&fp->fp_mutex); | |
77 | ocfs2_file_lock_res_init(&fp->fp_flock, fp); | |
78 | file->private_data = fp; | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | static void ocfs2_free_file_private(struct inode *inode, struct file *file) | |
84 | { | |
85 | struct ocfs2_file_private *fp = file->private_data; | |
86 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
87 | ||
88 | if (fp) { | |
89 | ocfs2_simple_drop_lockres(osb, &fp->fp_flock); | |
90 | ocfs2_lock_res_free(&fp->fp_flock); | |
91 | kfree(fp); | |
92 | file->private_data = NULL; | |
93 | } | |
94 | } | |
95 | ||
ccd979bd MF |
96 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
97 | { | |
98 | int status; | |
99 | int mode = file->f_flags; | |
100 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
101 | ||
468eedde TM |
102 | trace_ocfs2_file_open(inode, file, file->f_path.dentry, |
103 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
104 | file->f_path.dentry->d_name.len, | |
105 | file->f_path.dentry->d_name.name, mode); | |
ccd979bd | 106 | |
907f4554 | 107 | if (file->f_mode & FMODE_WRITE) |
871a2931 | 108 | dquot_initialize(inode); |
907f4554 | 109 | |
ccd979bd MF |
110 | spin_lock(&oi->ip_lock); |
111 | ||
112 | /* Check that the inode hasn't been wiped from disk by another | |
113 | * node. If it hasn't then we're safe as long as we hold the | |
114 | * spin lock until our increment of open count. */ | |
115 | if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) { | |
116 | spin_unlock(&oi->ip_lock); | |
117 | ||
118 | status = -ENOENT; | |
119 | goto leave; | |
120 | } | |
121 | ||
122 | if (mode & O_DIRECT) | |
123 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; | |
124 | ||
125 | oi->ip_open_count++; | |
126 | spin_unlock(&oi->ip_lock); | |
53fc622b MF |
127 | |
128 | status = ocfs2_init_file_private(inode, file); | |
129 | if (status) { | |
130 | /* | |
131 | * We want to set open count back if we're failing the | |
132 | * open. | |
133 | */ | |
134 | spin_lock(&oi->ip_lock); | |
135 | oi->ip_open_count--; | |
136 | spin_unlock(&oi->ip_lock); | |
137 | } | |
138 | ||
ccd979bd | 139 | leave: |
ccd979bd MF |
140 | return status; |
141 | } | |
142 | ||
143 | static int ocfs2_file_release(struct inode *inode, struct file *file) | |
144 | { | |
145 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
146 | ||
ccd979bd MF |
147 | spin_lock(&oi->ip_lock); |
148 | if (!--oi->ip_open_count) | |
149 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; | |
468eedde TM |
150 | |
151 | trace_ocfs2_file_release(inode, file, file->f_path.dentry, | |
152 | oi->ip_blkno, | |
153 | file->f_path.dentry->d_name.len, | |
154 | file->f_path.dentry->d_name.name, | |
155 | oi->ip_open_count); | |
ccd979bd MF |
156 | spin_unlock(&oi->ip_lock); |
157 | ||
53fc622b MF |
158 | ocfs2_free_file_private(inode, file); |
159 | ||
ccd979bd MF |
160 | return 0; |
161 | } | |
162 | ||
53fc622b MF |
163 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
164 | { | |
165 | return ocfs2_init_file_private(inode, file); | |
166 | } | |
167 | ||
168 | static int ocfs2_dir_release(struct inode *inode, struct file *file) | |
169 | { | |
170 | ocfs2_free_file_private(inode, file); | |
171 | return 0; | |
172 | } | |
173 | ||
02c24a82 JB |
174 | static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end, |
175 | int datasync) | |
ccd979bd MF |
176 | { |
177 | int err = 0; | |
178 | journal_t *journal; | |
7ea80859 | 179 | struct inode *inode = file->f_mapping->host; |
ccd979bd MF |
180 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
181 | ||
468eedde TM |
182 | trace_ocfs2_sync_file(inode, file, file->f_path.dentry, |
183 | OCFS2_I(inode)->ip_blkno, | |
184 | file->f_path.dentry->d_name.len, | |
185 | file->f_path.dentry->d_name.name, | |
186 | (unsigned long long)datasync); | |
ccd979bd | 187 | |
a987c7ca YL |
188 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
189 | return -EROFS; | |
190 | ||
02c24a82 JB |
191 | err = filemap_write_and_wait_range(inode->i_mapping, start, end); |
192 | if (err) | |
193 | return err; | |
194 | ||
195 | /* | |
196 | * Probably don't need the i_mutex at all in here, just putting it here | |
197 | * to be consistent with how fsync used to be called, someone more | |
198 | * familiar with the fs could possibly remove it. | |
199 | */ | |
200 | mutex_lock(&inode->i_mutex); | |
04eda1a1 JK |
201 | if (datasync && !(inode->i_state & I_DIRTY_DATASYNC)) { |
202 | /* | |
203 | * We still have to flush drive's caches to get data to the | |
204 | * platter | |
205 | */ | |
206 | if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) | |
f8cae0f0 | 207 | blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
e04cc15f | 208 | goto bail; |
04eda1a1 | 209 | } |
e04cc15f | 210 | |
ccd979bd | 211 | journal = osb->journal->j_journal; |
2b4e30fb | 212 | err = jbd2_journal_force_commit(journal); |
ccd979bd MF |
213 | |
214 | bail: | |
c1e8d35e TM |
215 | if (err) |
216 | mlog_errno(err); | |
02c24a82 | 217 | mutex_unlock(&inode->i_mutex); |
ccd979bd MF |
218 | |
219 | return (err < 0) ? -EIO : 0; | |
220 | } | |
221 | ||
7f1a37e3 TY |
222 | int ocfs2_should_update_atime(struct inode *inode, |
223 | struct vfsmount *vfsmnt) | |
224 | { | |
225 | struct timespec now; | |
226 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
227 | ||
228 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
229 | return 0; | |
230 | ||
231 | if ((inode->i_flags & S_NOATIME) || | |
232 | ((inode->i_sb->s_flags & MS_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
233 | return 0; | |
234 | ||
6c2aad05 MF |
235 | /* |
236 | * We can be called with no vfsmnt structure - NFSD will | |
237 | * sometimes do this. | |
238 | * | |
239 | * Note that our action here is different than touch_atime() - | |
240 | * if we can't tell whether this is a noatime mount, then we | |
241 | * don't know whether to trust the value of s_atime_quantum. | |
242 | */ | |
243 | if (vfsmnt == NULL) | |
244 | return 0; | |
245 | ||
7f1a37e3 TY |
246 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
247 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
248 | return 0; | |
249 | ||
7e913c53 MF |
250 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
251 | if ((timespec_compare(&inode->i_atime, &inode->i_mtime) <= 0) || | |
252 | (timespec_compare(&inode->i_atime, &inode->i_ctime) <= 0)) | |
253 | return 1; | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
7f1a37e3 TY |
258 | now = CURRENT_TIME; |
259 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) | |
260 | return 0; | |
261 | else | |
262 | return 1; | |
263 | } | |
264 | ||
265 | int ocfs2_update_inode_atime(struct inode *inode, | |
266 | struct buffer_head *bh) | |
267 | { | |
268 | int ret; | |
269 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
270 | handle_t *handle; | |
c11e9faf | 271 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
7f1a37e3 | 272 | |
7f1a37e3 | 273 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
274 | if (IS_ERR(handle)) { |
275 | ret = PTR_ERR(handle); | |
7f1a37e3 TY |
276 | mlog_errno(ret); |
277 | goto out; | |
278 | } | |
279 | ||
0cf2f763 | 280 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 281 | OCFS2_JOURNAL_ACCESS_WRITE); |
c11e9faf MF |
282 | if (ret) { |
283 | mlog_errno(ret); | |
284 | goto out_commit; | |
285 | } | |
286 | ||
287 | /* | |
288 | * Don't use ocfs2_mark_inode_dirty() here as we don't always | |
289 | * have i_mutex to guard against concurrent changes to other | |
290 | * inode fields. | |
291 | */ | |
7f1a37e3 | 292 | inode->i_atime = CURRENT_TIME; |
c11e9faf MF |
293 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
294 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); | |
ec20cec7 | 295 | ocfs2_journal_dirty(handle, bh); |
7f1a37e3 | 296 | |
c11e9faf | 297 | out_commit: |
7f1a37e3 TY |
298 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
299 | out: | |
7f1a37e3 TY |
300 | return ret; |
301 | } | |
302 | ||
6cb129f5 AB |
303 | static int ocfs2_set_inode_size(handle_t *handle, |
304 | struct inode *inode, | |
305 | struct buffer_head *fe_bh, | |
306 | u64 new_i_size) | |
ccd979bd MF |
307 | { |
308 | int status; | |
309 | ||
ccd979bd | 310 | i_size_write(inode, new_i_size); |
8110b073 | 311 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
ccd979bd MF |
312 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
313 | ||
314 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
315 | if (status < 0) { | |
316 | mlog_errno(status); | |
317 | goto bail; | |
318 | } | |
319 | ||
320 | bail: | |
ccd979bd MF |
321 | return status; |
322 | } | |
323 | ||
9e33d69f JK |
324 | int ocfs2_simple_size_update(struct inode *inode, |
325 | struct buffer_head *di_bh, | |
326 | u64 new_i_size) | |
ccd979bd MF |
327 | { |
328 | int ret; | |
329 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 330 | handle_t *handle = NULL; |
ccd979bd | 331 | |
65eff9cc | 332 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
333 | if (IS_ERR(handle)) { |
334 | ret = PTR_ERR(handle); | |
ccd979bd MF |
335 | mlog_errno(ret); |
336 | goto out; | |
337 | } | |
338 | ||
339 | ret = ocfs2_set_inode_size(handle, inode, di_bh, | |
340 | new_i_size); | |
341 | if (ret < 0) | |
342 | mlog_errno(ret); | |
343 | ||
02dc1af4 | 344 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
345 | out: |
346 | return ret; | |
347 | } | |
348 | ||
37f8a2bf TM |
349 | static int ocfs2_cow_file_pos(struct inode *inode, |
350 | struct buffer_head *fe_bh, | |
351 | u64 offset) | |
352 | { | |
353 | int status; | |
354 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
355 | unsigned int num_clusters = 0; | |
356 | unsigned int ext_flags = 0; | |
357 | ||
358 | /* | |
359 | * If the new offset is aligned to the range of the cluster, there is | |
360 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to | |
361 | * CoW either. | |
362 | */ | |
363 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) | |
364 | return 0; | |
365 | ||
366 | status = ocfs2_get_clusters(inode, cpos, &phys, | |
367 | &num_clusters, &ext_flags); | |
368 | if (status) { | |
369 | mlog_errno(status); | |
370 | goto out; | |
371 | } | |
372 | ||
373 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
374 | goto out; | |
375 | ||
c7dd3392 | 376 | return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1); |
37f8a2bf TM |
377 | |
378 | out: | |
379 | return status; | |
380 | } | |
381 | ||
ccd979bd MF |
382 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
383 | struct inode *inode, | |
384 | struct buffer_head *fe_bh, | |
385 | u64 new_i_size) | |
386 | { | |
387 | int status; | |
1fabe148 | 388 | handle_t *handle; |
60b11392 | 389 | struct ocfs2_dinode *di; |
35edec1d | 390 | u64 cluster_bytes; |
ccd979bd | 391 | |
37f8a2bf TM |
392 | /* |
393 | * We need to CoW the cluster contains the offset if it is reflinked | |
394 | * since we will call ocfs2_zero_range_for_truncate later which will | |
395 | * write "0" from offset to the end of the cluster. | |
396 | */ | |
397 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); | |
398 | if (status) { | |
399 | mlog_errno(status); | |
400 | return status; | |
401 | } | |
402 | ||
ccd979bd MF |
403 | /* TODO: This needs to actually orphan the inode in this |
404 | * transaction. */ | |
405 | ||
65eff9cc | 406 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ccd979bd MF |
407 | if (IS_ERR(handle)) { |
408 | status = PTR_ERR(handle); | |
409 | mlog_errno(status); | |
410 | goto out; | |
411 | } | |
412 | ||
0cf2f763 | 413 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
13723d00 | 414 | OCFS2_JOURNAL_ACCESS_WRITE); |
60b11392 MF |
415 | if (status < 0) { |
416 | mlog_errno(status); | |
417 | goto out_commit; | |
418 | } | |
419 | ||
420 | /* | |
421 | * Do this before setting i_size. | |
422 | */ | |
35edec1d MF |
423 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
424 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, | |
425 | cluster_bytes); | |
60b11392 MF |
426 | if (status) { |
427 | mlog_errno(status); | |
428 | goto out_commit; | |
429 | } | |
430 | ||
431 | i_size_write(inode, new_i_size); | |
60b11392 MF |
432 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
433 | ||
434 | di = (struct ocfs2_dinode *) fe_bh->b_data; | |
435 | di->i_size = cpu_to_le64(new_i_size); | |
436 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); | |
437 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
438 | ||
ec20cec7 | 439 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 440 | |
60b11392 | 441 | out_commit: |
02dc1af4 | 442 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 443 | out: |
ccd979bd MF |
444 | return status; |
445 | } | |
446 | ||
447 | static int ocfs2_truncate_file(struct inode *inode, | |
448 | struct buffer_head *di_bh, | |
449 | u64 new_i_size) | |
450 | { | |
451 | int status = 0; | |
452 | struct ocfs2_dinode *fe = NULL; | |
453 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
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 | 458 | |
468eedde TM |
459 | trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno, |
460 | (unsigned long long)le64_to_cpu(fe->i_size), | |
461 | (unsigned long long)new_i_size); | |
462 | ||
ccd979bd | 463 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), |
b0697053 MF |
464 | "Inode %llu, inode i_size = %lld != di " |
465 | "i_size = %llu, i_flags = 0x%x\n", | |
466 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ccd979bd | 467 | i_size_read(inode), |
b0697053 MF |
468 | (unsigned long long)le64_to_cpu(fe->i_size), |
469 | le32_to_cpu(fe->i_flags)); | |
ccd979bd MF |
470 | |
471 | if (new_i_size > le64_to_cpu(fe->i_size)) { | |
468eedde TM |
472 | trace_ocfs2_truncate_file_error( |
473 | (unsigned long long)le64_to_cpu(fe->i_size), | |
474 | (unsigned long long)new_i_size); | |
ccd979bd MF |
475 | status = -EINVAL; |
476 | mlog_errno(status); | |
477 | goto bail; | |
478 | } | |
479 | ||
ccd979bd MF |
480 | /* lets handle the simple truncate cases before doing any more |
481 | * cluster locking. */ | |
482 | if (new_i_size == le64_to_cpu(fe->i_size)) | |
483 | goto bail; | |
484 | ||
2e89b2e4 MF |
485 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
486 | ||
4fe370af MF |
487 | ocfs2_resv_discard(&osb->osb_la_resmap, |
488 | &OCFS2_I(inode)->ip_la_data_resv); | |
489 | ||
c934a92d MF |
490 | /* |
491 | * The inode lock forced other nodes to sync and drop their | |
492 | * pages, which (correctly) happens even if we have a truncate | |
493 | * without allocation change - ocfs2 cluster sizes can be much | |
494 | * greater than page size, so we have to truncate them | |
495 | * anyway. | |
496 | */ | |
2e89b2e4 MF |
497 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
498 | truncate_inode_pages(inode->i_mapping, new_i_size); | |
499 | ||
1afc32b9 MF |
500 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
501 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, | |
b1967d0e | 502 | i_size_read(inode), 1); |
1afc32b9 MF |
503 | if (status) |
504 | mlog_errno(status); | |
505 | ||
c934a92d | 506 | goto bail_unlock_sem; |
1afc32b9 MF |
507 | } |
508 | ||
ccd979bd MF |
509 | /* alright, we're going to need to do a full blown alloc size |
510 | * change. Orphan the inode so that recovery can complete the | |
511 | * truncate if necessary. This does the task of marking | |
512 | * i_size. */ | |
513 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); | |
514 | if (status < 0) { | |
515 | mlog_errno(status); | |
c934a92d | 516 | goto bail_unlock_sem; |
ccd979bd MF |
517 | } |
518 | ||
78f94673 | 519 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
ccd979bd MF |
520 | if (status < 0) { |
521 | mlog_errno(status); | |
c934a92d | 522 | goto bail_unlock_sem; |
ccd979bd MF |
523 | } |
524 | ||
525 | /* TODO: orphan dir cleanup here. */ | |
c934a92d | 526 | bail_unlock_sem: |
2e89b2e4 MF |
527 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
528 | ||
ccd979bd | 529 | bail: |
8b2c0dba TM |
530 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
531 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
ccd979bd | 532 | |
ccd979bd MF |
533 | return status; |
534 | } | |
535 | ||
536 | /* | |
0eb8d47e | 537 | * extend file allocation only here. |
ccd979bd MF |
538 | * we'll update all the disk stuff, and oip->alloc_size |
539 | * | |
540 | * expect stuff to be locked, a transaction started and enough data / | |
541 | * metadata reservations in the contexts. | |
542 | * | |
543 | * Will return -EAGAIN, and a reason if a restart is needed. | |
544 | * If passed in, *reason will always be set, even in error. | |
545 | */ | |
0eb8d47e TM |
546 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
547 | struct inode *inode, | |
548 | u32 *logical_offset, | |
549 | u32 clusters_to_add, | |
550 | int mark_unwritten, | |
551 | struct buffer_head *fe_bh, | |
552 | handle_t *handle, | |
553 | struct ocfs2_alloc_context *data_ac, | |
554 | struct ocfs2_alloc_context *meta_ac, | |
555 | enum ocfs2_alloc_restarted *reason_ret) | |
ccd979bd | 556 | { |
f99b9b7c JB |
557 | int ret; |
558 | struct ocfs2_extent_tree et; | |
ccd979bd | 559 | |
5e404e9e | 560 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
cbee7e1a JB |
561 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
562 | clusters_to_add, mark_unwritten, | |
563 | data_ac, meta_ac, reason_ret); | |
f99b9b7c JB |
564 | |
565 | return ret; | |
ccd979bd MF |
566 | } |
567 | ||
2ae99a60 MF |
568 | static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
569 | u32 clusters_to_add, int mark_unwritten) | |
ccd979bd MF |
570 | { |
571 | int status = 0; | |
572 | int restart_func = 0; | |
abf8b156 | 573 | int credits; |
2ae99a60 | 574 | u32 prev_clusters; |
ccd979bd MF |
575 | struct buffer_head *bh = NULL; |
576 | struct ocfs2_dinode *fe = NULL; | |
1fabe148 | 577 | handle_t *handle = NULL; |
ccd979bd MF |
578 | struct ocfs2_alloc_context *data_ac = NULL; |
579 | struct ocfs2_alloc_context *meta_ac = NULL; | |
580 | enum ocfs2_alloc_restarted why; | |
581 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 582 | struct ocfs2_extent_tree et; |
a90714c1 | 583 | int did_quota = 0; |
ccd979bd | 584 | |
dcd0538f | 585 | /* |
f0cb0f0b | 586 | * Unwritten extent only exists for file systems which |
dcd0538f MF |
587 | * support holes. |
588 | */ | |
2ae99a60 | 589 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
dcd0538f | 590 | |
b657c95c | 591 | status = ocfs2_read_inode_block(inode, &bh); |
ccd979bd MF |
592 | if (status < 0) { |
593 | mlog_errno(status); | |
594 | goto leave; | |
595 | } | |
ccd979bd | 596 | fe = (struct ocfs2_dinode *) bh->b_data; |
ccd979bd MF |
597 | |
598 | restart_all: | |
599 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); | |
600 | ||
5e404e9e | 601 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
f99b9b7c JB |
602 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
603 | &data_ac, &meta_ac); | |
9517bac6 MF |
604 | if (status) { |
605 | mlog_errno(status); | |
606 | goto leave; | |
607 | } | |
608 | ||
06f9da6e | 609 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list); |
65eff9cc | 610 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
611 | if (IS_ERR(handle)) { |
612 | status = PTR_ERR(handle); | |
613 | handle = NULL; | |
614 | mlog_errno(status); | |
615 | goto leave; | |
616 | } | |
617 | ||
618 | restarted_transaction: | |
468eedde TM |
619 | trace_ocfs2_extend_allocation( |
620 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
621 | (unsigned long long)i_size_read(inode), | |
622 | le32_to_cpu(fe->i_clusters), clusters_to_add, | |
623 | why, restart_func); | |
624 | ||
5dd4056d CH |
625 | status = dquot_alloc_space_nodirty(inode, |
626 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); | |
627 | if (status) | |
a90714c1 | 628 | goto leave; |
a90714c1 JK |
629 | did_quota = 1; |
630 | ||
ccd979bd MF |
631 | /* reserve a write to the file entry early on - that we if we |
632 | * run out of credits in the allocation path, we can still | |
633 | * update i_size. */ | |
0cf2f763 | 634 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 635 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
636 | if (status < 0) { |
637 | mlog_errno(status); | |
638 | goto leave; | |
639 | } | |
640 | ||
641 | prev_clusters = OCFS2_I(inode)->ip_clusters; | |
642 | ||
0eb8d47e TM |
643 | status = ocfs2_add_inode_data(osb, |
644 | inode, | |
645 | &logical_start, | |
646 | clusters_to_add, | |
647 | mark_unwritten, | |
648 | bh, | |
649 | handle, | |
650 | data_ac, | |
651 | meta_ac, | |
652 | &why); | |
ccd979bd MF |
653 | if ((status < 0) && (status != -EAGAIN)) { |
654 | if (status != -ENOSPC) | |
655 | mlog_errno(status); | |
656 | goto leave; | |
657 | } | |
658 | ||
ec20cec7 | 659 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
660 | |
661 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
662 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); | |
663 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
a90714c1 | 664 | /* Release unused quota reservation */ |
5dd4056d | 665 | dquot_free_space(inode, |
a90714c1 JK |
666 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
667 | did_quota = 0; | |
ccd979bd MF |
668 | |
669 | if (why != RESTART_NONE && clusters_to_add) { | |
670 | if (why == RESTART_META) { | |
ccd979bd | 671 | restart_func = 1; |
79681842 | 672 | status = 0; |
ccd979bd MF |
673 | } else { |
674 | BUG_ON(why != RESTART_TRANS); | |
675 | ||
2b1e55c3 | 676 | status = ocfs2_allocate_extend_trans(handle, 1); |
ccd979bd MF |
677 | if (status < 0) { |
678 | /* handle still has to be committed at | |
679 | * this point. */ | |
680 | status = -ENOMEM; | |
681 | mlog_errno(status); | |
682 | goto leave; | |
683 | } | |
684 | goto restarted_transaction; | |
685 | } | |
686 | } | |
687 | ||
468eedde | 688 | trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno, |
1ca1a111 | 689 | le32_to_cpu(fe->i_clusters), |
468eedde TM |
690 | (unsigned long long)le64_to_cpu(fe->i_size), |
691 | OCFS2_I(inode)->ip_clusters, | |
692 | (unsigned long long)i_size_read(inode)); | |
ccd979bd MF |
693 | |
694 | leave: | |
a90714c1 | 695 | if (status < 0 && did_quota) |
5dd4056d | 696 | dquot_free_space(inode, |
a90714c1 | 697 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
ccd979bd | 698 | if (handle) { |
02dc1af4 | 699 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
700 | handle = NULL; |
701 | } | |
702 | if (data_ac) { | |
703 | ocfs2_free_alloc_context(data_ac); | |
704 | data_ac = NULL; | |
705 | } | |
706 | if (meta_ac) { | |
707 | ocfs2_free_alloc_context(meta_ac); | |
708 | meta_ac = NULL; | |
709 | } | |
710 | if ((!status) && restart_func) { | |
711 | restart_func = 0; | |
712 | goto restart_all; | |
713 | } | |
a81cb88b MF |
714 | brelse(bh); |
715 | bh = NULL; | |
ccd979bd | 716 | |
ccd979bd MF |
717 | return status; |
718 | } | |
719 | ||
a4bfb4cf JB |
720 | /* |
721 | * While a write will already be ordering the data, a truncate will not. | |
722 | * Thus, we need to explicitly order the zeroed pages. | |
723 | */ | |
724 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode) | |
725 | { | |
726 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
727 | handle_t *handle = NULL; | |
728 | int ret = 0; | |
729 | ||
730 | if (!ocfs2_should_order_data(inode)) | |
731 | goto out; | |
732 | ||
733 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
734 | if (IS_ERR(handle)) { | |
735 | ret = -ENOMEM; | |
736 | mlog_errno(ret); | |
737 | goto out; | |
738 | } | |
739 | ||
740 | ret = ocfs2_jbd2_file_inode(handle, inode); | |
741 | if (ret < 0) | |
742 | mlog_errno(ret); | |
743 | ||
744 | out: | |
745 | if (ret) { | |
746 | if (!IS_ERR(handle)) | |
747 | ocfs2_commit_trans(osb, handle); | |
748 | handle = ERR_PTR(ret); | |
749 | } | |
750 | return handle; | |
751 | } | |
752 | ||
ccd979bd MF |
753 | /* Some parts of this taken from generic_cont_expand, which turned out |
754 | * to be too fragile to do exactly what we need without us having to | |
4e02ed4b | 755 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
a4bfb4cf JB |
756 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
757 | u64 abs_to) | |
ccd979bd MF |
758 | { |
759 | struct address_space *mapping = inode->i_mapping; | |
760 | struct page *page; | |
a4bfb4cf | 761 | unsigned long index = abs_from >> PAGE_CACHE_SHIFT; |
1fabe148 | 762 | handle_t *handle = NULL; |
5453258d | 763 | int ret = 0; |
a4bfb4cf | 764 | unsigned zero_from, zero_to, block_start, block_end; |
ccd979bd | 765 | |
a4bfb4cf JB |
766 | BUG_ON(abs_from >= abs_to); |
767 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_CACHE_SHIFT)); | |
768 | BUG_ON(abs_from & (inode->i_blkbits - 1)); | |
ccd979bd | 769 | |
9b4c0ff3 | 770 | page = find_or_create_page(mapping, index, GFP_NOFS); |
ccd979bd MF |
771 | if (!page) { |
772 | ret = -ENOMEM; | |
773 | mlog_errno(ret); | |
774 | goto out; | |
775 | } | |
776 | ||
a4bfb4cf JB |
777 | /* Get the offsets within the page that we want to zero */ |
778 | zero_from = abs_from & (PAGE_CACHE_SIZE - 1); | |
779 | zero_to = abs_to & (PAGE_CACHE_SIZE - 1); | |
780 | if (!zero_to) | |
781 | zero_to = PAGE_CACHE_SIZE; | |
ccd979bd | 782 | |
468eedde TM |
783 | trace_ocfs2_write_zero_page( |
784 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
785 | (unsigned long long)abs_from, | |
786 | (unsigned long long)abs_to, | |
787 | index, zero_from, zero_to); | |
5693486b | 788 | |
a4bfb4cf JB |
789 | /* We know that zero_from is block aligned */ |
790 | for (block_start = zero_from; block_start < zero_to; | |
791 | block_start = block_end) { | |
792 | block_end = block_start + (1 << inode->i_blkbits); | |
793 | ||
794 | /* | |
ebdec241 CH |
795 | * block_start is block-aligned. Bump it by one to force |
796 | * __block_write_begin and block_commit_write to zero the | |
a4bfb4cf JB |
797 | * whole block. |
798 | */ | |
ebdec241 CH |
799 | ret = __block_write_begin(page, block_start + 1, 0, |
800 | ocfs2_get_block); | |
a4bfb4cf JB |
801 | if (ret < 0) { |
802 | mlog_errno(ret); | |
ccd979bd MF |
803 | goto out_unlock; |
804 | } | |
ccd979bd | 805 | |
a4bfb4cf JB |
806 | if (!handle) { |
807 | handle = ocfs2_zero_start_ordered_transaction(inode); | |
808 | if (IS_ERR(handle)) { | |
809 | ret = PTR_ERR(handle); | |
810 | handle = NULL; | |
811 | break; | |
812 | } | |
813 | } | |
814 | ||
815 | /* must not update i_size! */ | |
816 | ret = block_commit_write(page, block_start + 1, | |
817 | block_start + 1); | |
818 | if (ret < 0) | |
819 | mlog_errno(ret); | |
820 | else | |
821 | ret = 0; | |
822 | } | |
ccd979bd MF |
823 | |
824 | if (handle) | |
02dc1af4 | 825 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
a4bfb4cf | 826 | |
ccd979bd MF |
827 | out_unlock: |
828 | unlock_page(page); | |
829 | page_cache_release(page); | |
830 | out: | |
831 | return ret; | |
832 | } | |
833 | ||
5693486b JB |
834 | /* |
835 | * Find the next range to zero. We do this in terms of bytes because | |
836 | * that's what ocfs2_zero_extend() wants, and it is dealing with the | |
837 | * pagecache. We may return multiple extents. | |
838 | * | |
839 | * zero_start and zero_end are ocfs2_zero_extend()s current idea of what | |
840 | * needs to be zeroed. range_start and range_end return the next zeroing | |
841 | * range. A subsequent call should pass the previous range_end as its | |
842 | * zero_start. If range_end is 0, there's nothing to do. | |
843 | * | |
844 | * Unwritten extents are skipped over. Refcounted extents are CoWd. | |
845 | */ | |
846 | static int ocfs2_zero_extend_get_range(struct inode *inode, | |
847 | struct buffer_head *di_bh, | |
848 | u64 zero_start, u64 zero_end, | |
849 | u64 *range_start, u64 *range_end) | |
ccd979bd | 850 | { |
5693486b JB |
851 | int rc = 0, needs_cow = 0; |
852 | u32 p_cpos, zero_clusters = 0; | |
853 | u32 zero_cpos = | |
854 | zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
855 | u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end); | |
856 | unsigned int num_clusters = 0; | |
857 | unsigned int ext_flags = 0; | |
ccd979bd | 858 | |
5693486b JB |
859 | while (zero_cpos < last_cpos) { |
860 | rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos, | |
861 | &num_clusters, &ext_flags); | |
862 | if (rc) { | |
863 | mlog_errno(rc); | |
ccd979bd MF |
864 | goto out; |
865 | } | |
866 | ||
5693486b JB |
867 | if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) { |
868 | zero_clusters = num_clusters; | |
869 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
870 | needs_cow = 1; | |
871 | break; | |
872 | } | |
873 | ||
874 | zero_cpos += num_clusters; | |
875 | } | |
876 | if (!zero_clusters) { | |
877 | *range_end = 0; | |
878 | goto out; | |
879 | } | |
880 | ||
881 | while ((zero_cpos + zero_clusters) < last_cpos) { | |
882 | rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters, | |
883 | &p_cpos, &num_clusters, | |
884 | &ext_flags); | |
885 | if (rc) { | |
886 | mlog_errno(rc); | |
887 | goto out; | |
888 | } | |
889 | ||
890 | if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN)) | |
891 | break; | |
892 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
893 | needs_cow = 1; | |
894 | zero_clusters += num_clusters; | |
895 | } | |
896 | if ((zero_cpos + zero_clusters) > last_cpos) | |
897 | zero_clusters = last_cpos - zero_cpos; | |
898 | ||
899 | if (needs_cow) { | |
c7dd3392 | 900 | rc = ocfs2_refcount_cow(inode, di_bh, zero_cpos, |
15502712 | 901 | zero_clusters, UINT_MAX); |
5693486b JB |
902 | if (rc) { |
903 | mlog_errno(rc); | |
904 | goto out; | |
905 | } | |
906 | } | |
907 | ||
908 | *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos); | |
909 | *range_end = ocfs2_clusters_to_bytes(inode->i_sb, | |
910 | zero_cpos + zero_clusters); | |
911 | ||
912 | out: | |
913 | return rc; | |
914 | } | |
915 | ||
916 | /* | |
917 | * Zero one range returned from ocfs2_zero_extend_get_range(). The caller | |
918 | * has made sure that the entire range needs zeroing. | |
919 | */ | |
920 | static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start, | |
921 | u64 range_end) | |
922 | { | |
923 | int rc = 0; | |
924 | u64 next_pos; | |
925 | u64 zero_pos = range_start; | |
926 | ||
468eedde TM |
927 | trace_ocfs2_zero_extend_range( |
928 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
929 | (unsigned long long)range_start, | |
930 | (unsigned long long)range_end); | |
5693486b JB |
931 | BUG_ON(range_start >= range_end); |
932 | ||
933 | while (zero_pos < range_end) { | |
934 | next_pos = (zero_pos & PAGE_CACHE_MASK) + PAGE_CACHE_SIZE; | |
935 | if (next_pos > range_end) | |
936 | next_pos = range_end; | |
937 | rc = ocfs2_write_zero_page(inode, zero_pos, next_pos); | |
938 | if (rc < 0) { | |
939 | mlog_errno(rc); | |
940 | break; | |
941 | } | |
942 | zero_pos = next_pos; | |
e2057c5a MF |
943 | |
944 | /* | |
945 | * Very large extends have the potential to lock up | |
946 | * the cpu for extended periods of time. | |
947 | */ | |
948 | cond_resched(); | |
ccd979bd MF |
949 | } |
950 | ||
5693486b JB |
951 | return rc; |
952 | } | |
953 | ||
954 | int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh, | |
955 | loff_t zero_to_size) | |
956 | { | |
957 | int ret = 0; | |
958 | u64 zero_start, range_start = 0, range_end = 0; | |
959 | struct super_block *sb = inode->i_sb; | |
960 | ||
961 | zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); | |
468eedde TM |
962 | trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno, |
963 | (unsigned long long)zero_start, | |
964 | (unsigned long long)i_size_read(inode)); | |
5693486b JB |
965 | while (zero_start < zero_to_size) { |
966 | ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start, | |
967 | zero_to_size, | |
968 | &range_start, | |
969 | &range_end); | |
970 | if (ret) { | |
971 | mlog_errno(ret); | |
972 | break; | |
973 | } | |
974 | if (!range_end) | |
975 | break; | |
976 | /* Trim the ends */ | |
977 | if (range_start < zero_start) | |
978 | range_start = zero_start; | |
979 | if (range_end > zero_to_size) | |
980 | range_end = zero_to_size; | |
981 | ||
982 | ret = ocfs2_zero_extend_range(inode, range_start, | |
983 | range_end); | |
984 | if (ret) { | |
985 | mlog_errno(ret); | |
986 | break; | |
987 | } | |
988 | zero_start = range_end; | |
989 | } | |
990 | ||
ccd979bd MF |
991 | return ret; |
992 | } | |
993 | ||
5693486b JB |
994 | int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh, |
995 | u64 new_i_size, u64 zero_to) | |
65ed39d6 MF |
996 | { |
997 | int ret; | |
998 | u32 clusters_to_add; | |
999 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1000 | ||
5693486b JB |
1001 | /* |
1002 | * Only quota files call this without a bh, and they can't be | |
1003 | * refcounted. | |
1004 | */ | |
1005 | BUG_ON(!di_bh && (oi->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL)); | |
1006 | BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE)); | |
1007 | ||
65ed39d6 MF |
1008 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); |
1009 | if (clusters_to_add < oi->ip_clusters) | |
1010 | clusters_to_add = 0; | |
1011 | else | |
1012 | clusters_to_add -= oi->ip_clusters; | |
1013 | ||
1014 | if (clusters_to_add) { | |
1015 | ret = __ocfs2_extend_allocation(inode, oi->ip_clusters, | |
1016 | clusters_to_add, 0); | |
1017 | if (ret) { | |
1018 | mlog_errno(ret); | |
1019 | goto out; | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * Call this even if we don't add any clusters to the tree. We | |
1025 | * still need to zero the area between the old i_size and the | |
1026 | * new i_size. | |
1027 | */ | |
5693486b | 1028 | ret = ocfs2_zero_extend(inode, di_bh, zero_to); |
65ed39d6 MF |
1029 | if (ret < 0) |
1030 | mlog_errno(ret); | |
1031 | ||
1032 | out: | |
1033 | return ret; | |
1034 | } | |
1035 | ||
ccd979bd MF |
1036 | static int ocfs2_extend_file(struct inode *inode, |
1037 | struct buffer_head *di_bh, | |
65ed39d6 | 1038 | u64 new_i_size) |
ccd979bd | 1039 | { |
c934a92d | 1040 | int ret = 0; |
1afc32b9 | 1041 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
ccd979bd | 1042 | |
65ed39d6 | 1043 | BUG_ON(!di_bh); |
53013cba | 1044 | |
ccd979bd MF |
1045 | /* setattr sometimes calls us like this. */ |
1046 | if (new_i_size == 0) | |
1047 | goto out; | |
1048 | ||
1049 | if (i_size_read(inode) == new_i_size) | |
5693486b | 1050 | goto out; |
ccd979bd MF |
1051 | BUG_ON(new_i_size < i_size_read(inode)); |
1052 | ||
0effef77 | 1053 | /* |
65ed39d6 MF |
1054 | * The alloc sem blocks people in read/write from reading our |
1055 | * allocation until we're done changing it. We depend on | |
1056 | * i_mutex to block other extend/truncate calls while we're | |
5693486b JB |
1057 | * here. We even have to hold it for sparse files because there |
1058 | * might be some tail zeroing. | |
0effef77 | 1059 | */ |
1afc32b9 MF |
1060 | down_write(&oi->ip_alloc_sem); |
1061 | ||
1062 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1063 | /* | |
1064 | * We can optimize small extends by keeping the inodes | |
1065 | * inline data. | |
1066 | */ | |
1067 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { | |
1068 | up_write(&oi->ip_alloc_sem); | |
1069 | goto out_update_size; | |
1070 | } | |
1071 | ||
1072 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1073 | if (ret) { | |
1074 | up_write(&oi->ip_alloc_sem); | |
1afc32b9 | 1075 | mlog_errno(ret); |
c934a92d | 1076 | goto out; |
1afc32b9 MF |
1077 | } |
1078 | } | |
1079 | ||
5693486b JB |
1080 | if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
1081 | ret = ocfs2_zero_extend(inode, di_bh, new_i_size); | |
1082 | else | |
1083 | ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size, | |
1084 | new_i_size); | |
1afc32b9 MF |
1085 | |
1086 | up_write(&oi->ip_alloc_sem); | |
65ed39d6 | 1087 | |
0effef77 MF |
1088 | if (ret < 0) { |
1089 | mlog_errno(ret); | |
c934a92d | 1090 | goto out; |
53013cba MF |
1091 | } |
1092 | ||
3a0782d0 | 1093 | out_update_size: |
65ed39d6 MF |
1094 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
1095 | if (ret < 0) | |
1096 | mlog_errno(ret); | |
ccd979bd MF |
1097 | |
1098 | out: | |
1099 | return ret; | |
1100 | } | |
1101 | ||
1102 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1103 | { | |
1104 | int status = 0, size_change; | |
1105 | struct inode *inode = dentry->d_inode; | |
1106 | struct super_block *sb = inode->i_sb; | |
1107 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
1108 | struct buffer_head *bh = NULL; | |
1fabe148 | 1109 | handle_t *handle = NULL; |
65bac575 | 1110 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
52a9ee28 | 1111 | int qtype; |
ccd979bd | 1112 | |
468eedde TM |
1113 | trace_ocfs2_setattr(inode, dentry, |
1114 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1115 | dentry->d_name.len, dentry->d_name.name, | |
1116 | attr->ia_valid, attr->ia_mode, | |
ba613560 EB |
1117 | from_kuid(&init_user_ns, attr->ia_uid), |
1118 | from_kgid(&init_user_ns, attr->ia_gid)); | |
ccd979bd | 1119 | |
bc535809 SM |
1120 | /* ensuring we don't even attempt to truncate a symlink */ |
1121 | if (S_ISLNK(inode->i_mode)) | |
1122 | attr->ia_valid &= ~ATTR_SIZE; | |
1123 | ||
ccd979bd MF |
1124 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
1125 | | ATTR_GID | ATTR_UID | ATTR_MODE) | |
468eedde | 1126 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) |
ccd979bd | 1127 | return 0; |
ccd979bd MF |
1128 | |
1129 | status = inode_change_ok(inode, attr); | |
1130 | if (status) | |
1131 | return status; | |
1132 | ||
12755627 DM |
1133 | if (is_quota_modification(inode, attr)) |
1134 | dquot_initialize(inode); | |
ccd979bd MF |
1135 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
1136 | if (size_change) { | |
1137 | status = ocfs2_rw_lock(inode, 1); | |
1138 | if (status < 0) { | |
1139 | mlog_errno(status); | |
1140 | goto bail; | |
1141 | } | |
1142 | } | |
1143 | ||
e63aecb6 | 1144 | status = ocfs2_inode_lock(inode, &bh, 1); |
ccd979bd MF |
1145 | if (status < 0) { |
1146 | if (status != -ENOENT) | |
1147 | mlog_errno(status); | |
1148 | goto bail_unlock_rw; | |
1149 | } | |
1150 | ||
1151 | if (size_change && attr->ia_size != i_size_read(inode)) { | |
5051f768 WW |
1152 | status = inode_newsize_ok(inode, attr->ia_size); |
1153 | if (status) | |
ce76fd30 | 1154 | goto bail_unlock; |
ce76fd30 | 1155 | |
562c72aa CH |
1156 | inode_dio_wait(inode); |
1157 | ||
2b4e30fb JB |
1158 | if (i_size_read(inode) > attr->ia_size) { |
1159 | if (ocfs2_should_order_data(inode)) { | |
1160 | status = ocfs2_begin_ordered_truncate(inode, | |
1161 | attr->ia_size); | |
1162 | if (status) | |
1163 | goto bail_unlock; | |
1164 | } | |
ccd979bd | 1165 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
2b4e30fb | 1166 | } else |
65ed39d6 | 1167 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
ccd979bd MF |
1168 | if (status < 0) { |
1169 | if (status != -ENOSPC) | |
1170 | mlog_errno(status); | |
1171 | status = -ENOSPC; | |
1172 | goto bail_unlock; | |
1173 | } | |
1174 | } | |
1175 | ||
488c8ef0 EB |
1176 | if ((attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) || |
1177 | (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) { | |
65bac575 JK |
1178 | /* |
1179 | * Gather pointers to quota structures so that allocation / | |
1180 | * freeing of quota structures happens here and not inside | |
b43fa828 | 1181 | * dquot_transfer() where we have problems with lock ordering |
65bac575 | 1182 | */ |
488c8ef0 | 1183 | if (attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid) |
a90714c1 JK |
1184 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
1185 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { | |
aca645a6 | 1186 | transfer_to[USRQUOTA] = dqget(sb, make_kqid_uid(attr->ia_uid)); |
52a9ee28 | 1187 | if (!transfer_to[USRQUOTA]) { |
65bac575 | 1188 | status = -ESRCH; |
a90714c1 | 1189 | goto bail_unlock; |
65bac575 | 1190 | } |
a90714c1 | 1191 | } |
488c8ef0 | 1192 | if (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid) |
a90714c1 JK |
1193 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
1194 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { | |
aca645a6 | 1195 | transfer_to[GRPQUOTA] = dqget(sb, make_kqid_gid(attr->ia_gid)); |
52a9ee28 | 1196 | if (!transfer_to[GRPQUOTA]) { |
65bac575 | 1197 | status = -ESRCH; |
a90714c1 | 1198 | goto bail_unlock; |
65bac575 | 1199 | } |
a90714c1 | 1200 | } |
65bac575 JK |
1201 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
1202 | 2 * ocfs2_quota_trans_credits(sb)); | |
a90714c1 JK |
1203 | if (IS_ERR(handle)) { |
1204 | status = PTR_ERR(handle); | |
1205 | mlog_errno(status); | |
1206 | goto bail_unlock; | |
1207 | } | |
52a9ee28 | 1208 | status = __dquot_transfer(inode, transfer_to); |
a90714c1 JK |
1209 | if (status < 0) |
1210 | goto bail_commit; | |
1211 | } else { | |
1212 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1213 | if (IS_ERR(handle)) { | |
1214 | status = PTR_ERR(handle); | |
1215 | mlog_errno(status); | |
1216 | goto bail_unlock; | |
1217 | } | |
ccd979bd MF |
1218 | } |
1219 | ||
1025774c CH |
1220 | setattr_copy(inode, attr); |
1221 | mark_inode_dirty(inode); | |
1222 | ||
ccd979bd MF |
1223 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
1224 | if (status < 0) | |
1225 | mlog_errno(status); | |
1226 | ||
1227 | bail_commit: | |
02dc1af4 | 1228 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1229 | bail_unlock: |
e63aecb6 | 1230 | ocfs2_inode_unlock(inode, 1); |
ccd979bd MF |
1231 | bail_unlock_rw: |
1232 | if (size_change) | |
1233 | ocfs2_rw_unlock(inode, 1); | |
1234 | bail: | |
a81cb88b | 1235 | brelse(bh); |
ccd979bd | 1236 | |
65bac575 | 1237 | /* Release quota pointers in case we acquired them */ |
52a9ee28 | 1238 | for (qtype = 0; qtype < MAXQUOTAS; qtype++) |
65bac575 | 1239 | dqput(transfer_to[qtype]); |
65bac575 | 1240 | |
060bc66d | 1241 | if (!status && attr->ia_valid & ATTR_MODE) { |
702e5bc6 | 1242 | status = posix_acl_chmod(inode, inode->i_mode); |
060bc66d TY |
1243 | if (status < 0) |
1244 | mlog_errno(status); | |
1245 | } | |
1246 | ||
ccd979bd MF |
1247 | return status; |
1248 | } | |
1249 | ||
1250 | int ocfs2_getattr(struct vfsmount *mnt, | |
1251 | struct dentry *dentry, | |
1252 | struct kstat *stat) | |
1253 | { | |
1254 | struct inode *inode = dentry->d_inode; | |
1255 | struct super_block *sb = dentry->d_inode->i_sb; | |
1256 | struct ocfs2_super *osb = sb->s_fs_info; | |
1257 | int err; | |
1258 | ||
ccd979bd MF |
1259 | err = ocfs2_inode_revalidate(dentry); |
1260 | if (err) { | |
1261 | if (err != -ENOENT) | |
1262 | mlog_errno(err); | |
1263 | goto bail; | |
1264 | } | |
1265 | ||
1266 | generic_fillattr(inode, stat); | |
1267 | ||
1268 | /* We set the blksize from the cluster size for performance */ | |
1269 | stat->blksize = osb->s_clustersize; | |
1270 | ||
1271 | bail: | |
ccd979bd MF |
1272 | return err; |
1273 | } | |
1274 | ||
10556cb2 | 1275 | int ocfs2_permission(struct inode *inode, int mask) |
d38eb8db TY |
1276 | { |
1277 | int ret; | |
1278 | ||
10556cb2 | 1279 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
1280 | return -ECHILD; |
1281 | ||
e63aecb6 | 1282 | ret = ocfs2_inode_lock(inode, NULL, 0); |
d38eb8db | 1283 | if (ret) { |
a9f5f707 MF |
1284 | if (ret != -ENOENT) |
1285 | mlog_errno(ret); | |
d38eb8db TY |
1286 | goto out; |
1287 | } | |
1288 | ||
2830ba7f | 1289 | ret = generic_permission(inode, mask); |
d38eb8db | 1290 | |
e63aecb6 | 1291 | ocfs2_inode_unlock(inode, 0); |
d38eb8db | 1292 | out: |
d38eb8db TY |
1293 | return ret; |
1294 | } | |
1295 | ||
b2580103 MF |
1296 | static int __ocfs2_write_remove_suid(struct inode *inode, |
1297 | struct buffer_head *bh) | |
ccd979bd MF |
1298 | { |
1299 | int ret; | |
1fabe148 | 1300 | handle_t *handle; |
ccd979bd MF |
1301 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1302 | struct ocfs2_dinode *di; | |
1303 | ||
468eedde TM |
1304 | trace_ocfs2_write_remove_suid( |
1305 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1306 | inode->i_mode); | |
ccd979bd | 1307 | |
65eff9cc | 1308 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
1309 | if (IS_ERR(handle)) { |
1310 | ret = PTR_ERR(handle); | |
ccd979bd MF |
1311 | mlog_errno(ret); |
1312 | goto out; | |
1313 | } | |
1314 | ||
0cf2f763 | 1315 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 1316 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1317 | if (ret < 0) { |
1318 | mlog_errno(ret); | |
b2580103 | 1319 | goto out_trans; |
ccd979bd MF |
1320 | } |
1321 | ||
1322 | inode->i_mode &= ~S_ISUID; | |
1323 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) | |
1324 | inode->i_mode &= ~S_ISGID; | |
1325 | ||
1326 | di = (struct ocfs2_dinode *) bh->b_data; | |
1327 | di->i_mode = cpu_to_le16(inode->i_mode); | |
1328 | ||
ec20cec7 | 1329 | ocfs2_journal_dirty(handle, bh); |
b2580103 | 1330 | |
ccd979bd | 1331 | out_trans: |
02dc1af4 | 1332 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1333 | out: |
ccd979bd MF |
1334 | return ret; |
1335 | } | |
1336 | ||
9517bac6 MF |
1337 | /* |
1338 | * Will look for holes and unwritten extents in the range starting at | |
1339 | * pos for count bytes (inclusive). | |
1340 | */ | |
1341 | static int ocfs2_check_range_for_holes(struct inode *inode, loff_t pos, | |
1342 | size_t count) | |
1343 | { | |
1344 | int ret = 0; | |
49cb8d2d | 1345 | unsigned int extent_flags; |
9517bac6 MF |
1346 | u32 cpos, clusters, extent_len, phys_cpos; |
1347 | struct super_block *sb = inode->i_sb; | |
1348 | ||
1349 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
1350 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
1351 | ||
1352 | while (clusters) { | |
49cb8d2d MF |
1353 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, |
1354 | &extent_flags); | |
9517bac6 MF |
1355 | if (ret < 0) { |
1356 | mlog_errno(ret); | |
1357 | goto out; | |
1358 | } | |
1359 | ||
49cb8d2d | 1360 | if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) { |
9517bac6 MF |
1361 | ret = 1; |
1362 | break; | |
1363 | } | |
1364 | ||
1365 | if (extent_len > clusters) | |
1366 | extent_len = clusters; | |
1367 | ||
1368 | clusters -= extent_len; | |
1369 | cpos += extent_len; | |
1370 | } | |
1371 | out: | |
1372 | return ret; | |
1373 | } | |
1374 | ||
b2580103 MF |
1375 | static int ocfs2_write_remove_suid(struct inode *inode) |
1376 | { | |
1377 | int ret; | |
1378 | struct buffer_head *bh = NULL; | |
b2580103 | 1379 | |
b657c95c | 1380 | ret = ocfs2_read_inode_block(inode, &bh); |
b2580103 MF |
1381 | if (ret < 0) { |
1382 | mlog_errno(ret); | |
1383 | goto out; | |
1384 | } | |
1385 | ||
1386 | ret = __ocfs2_write_remove_suid(inode, bh); | |
1387 | out: | |
1388 | brelse(bh); | |
1389 | return ret; | |
1390 | } | |
1391 | ||
2ae99a60 MF |
1392 | /* |
1393 | * Allocate enough extents to cover the region starting at byte offset | |
1394 | * start for len bytes. Existing extents are skipped, any extents | |
1395 | * added are marked as "unwritten". | |
1396 | */ | |
1397 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, | |
1398 | u64 start, u64 len) | |
1399 | { | |
1400 | int ret; | |
1401 | u32 cpos, phys_cpos, clusters, alloc_size; | |
1afc32b9 MF |
1402 | u64 end = start + len; |
1403 | struct buffer_head *di_bh = NULL; | |
1404 | ||
1405 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
b657c95c | 1406 | ret = ocfs2_read_inode_block(inode, &di_bh); |
1afc32b9 MF |
1407 | if (ret) { |
1408 | mlog_errno(ret); | |
1409 | goto out; | |
1410 | } | |
1411 | ||
1412 | /* | |
1413 | * Nothing to do if the requested reservation range | |
1414 | * fits within the inode. | |
1415 | */ | |
1416 | if (ocfs2_size_fits_inline_data(di_bh, end)) | |
1417 | goto out; | |
1418 | ||
1419 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1420 | if (ret) { | |
1421 | mlog_errno(ret); | |
1422 | goto out; | |
1423 | } | |
1424 | } | |
2ae99a60 MF |
1425 | |
1426 | /* | |
1427 | * We consider both start and len to be inclusive. | |
1428 | */ | |
1429 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1430 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); | |
1431 | clusters -= cpos; | |
1432 | ||
1433 | while (clusters) { | |
1434 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1435 | &alloc_size, NULL); | |
1436 | if (ret) { | |
1437 | mlog_errno(ret); | |
1438 | goto out; | |
1439 | } | |
1440 | ||
1441 | /* | |
1442 | * Hole or existing extent len can be arbitrary, so | |
1443 | * cap it to our own allocation request. | |
1444 | */ | |
1445 | if (alloc_size > clusters) | |
1446 | alloc_size = clusters; | |
1447 | ||
1448 | if (phys_cpos) { | |
1449 | /* | |
1450 | * We already have an allocation at this | |
1451 | * region so we can safely skip it. | |
1452 | */ | |
1453 | goto next; | |
1454 | } | |
1455 | ||
1456 | ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1); | |
1457 | if (ret) { | |
1458 | if (ret != -ENOSPC) | |
1459 | mlog_errno(ret); | |
1460 | goto out; | |
1461 | } | |
1462 | ||
1463 | next: | |
1464 | cpos += alloc_size; | |
1465 | clusters -= alloc_size; | |
1466 | } | |
1467 | ||
1468 | ret = 0; | |
1469 | out: | |
1afc32b9 MF |
1470 | |
1471 | brelse(di_bh); | |
2ae99a60 MF |
1472 | return ret; |
1473 | } | |
1474 | ||
063c4561 MF |
1475 | /* |
1476 | * Truncate a byte range, avoiding pages within partial clusters. This | |
1477 | * preserves those pages for the zeroing code to write to. | |
1478 | */ | |
1479 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, | |
1480 | u64 byte_len) | |
1481 | { | |
1482 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1483 | loff_t start, end; | |
1484 | struct address_space *mapping = inode->i_mapping; | |
1485 | ||
1486 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); | |
1487 | end = byte_start + byte_len; | |
1488 | end = end & ~(osb->s_clustersize - 1); | |
1489 | ||
1490 | if (start < end) { | |
1491 | unmap_mapping_range(mapping, start, end - start, 0); | |
1492 | truncate_inode_pages_range(mapping, start, end - 1); | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | static int ocfs2_zero_partial_clusters(struct inode *inode, | |
1497 | u64 start, u64 len) | |
1498 | { | |
1499 | int ret = 0; | |
1500 | u64 tmpend, end = start + len; | |
1501 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1502 | unsigned int csize = osb->s_clustersize; | |
1503 | handle_t *handle; | |
1504 | ||
1505 | /* | |
1506 | * The "start" and "end" values are NOT necessarily part of | |
1507 | * the range whose allocation is being deleted. Rather, this | |
1508 | * is what the user passed in with the request. We must zero | |
1509 | * partial clusters here. There's no need to worry about | |
1510 | * physical allocation - the zeroing code knows to skip holes. | |
1511 | */ | |
468eedde TM |
1512 | trace_ocfs2_zero_partial_clusters( |
1513 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1514 | (unsigned long long)start, (unsigned long long)end); | |
063c4561 MF |
1515 | |
1516 | /* | |
1517 | * If both edges are on a cluster boundary then there's no | |
1518 | * zeroing required as the region is part of the allocation to | |
1519 | * be truncated. | |
1520 | */ | |
1521 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) | |
1522 | goto out; | |
1523 | ||
1524 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
1525 | if (IS_ERR(handle)) { |
1526 | ret = PTR_ERR(handle); | |
063c4561 MF |
1527 | mlog_errno(ret); |
1528 | goto out; | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * We want to get the byte offset of the end of the 1st cluster. | |
1533 | */ | |
1534 | tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1)); | |
1535 | if (tmpend > end) | |
1536 | tmpend = end; | |
1537 | ||
468eedde TM |
1538 | trace_ocfs2_zero_partial_clusters_range1((unsigned long long)start, |
1539 | (unsigned long long)tmpend); | |
063c4561 MF |
1540 | |
1541 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend); | |
1542 | if (ret) | |
1543 | mlog_errno(ret); | |
1544 | ||
1545 | if (tmpend < end) { | |
1546 | /* | |
1547 | * This may make start and end equal, but the zeroing | |
1548 | * code will skip any work in that case so there's no | |
1549 | * need to catch it up here. | |
1550 | */ | |
1551 | start = end & ~(osb->s_clustersize - 1); | |
1552 | ||
468eedde TM |
1553 | trace_ocfs2_zero_partial_clusters_range2( |
1554 | (unsigned long long)start, (unsigned long long)end); | |
063c4561 MF |
1555 | |
1556 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); | |
1557 | if (ret) | |
1558 | mlog_errno(ret); | |
1559 | } | |
1560 | ||
1561 | ocfs2_commit_trans(osb, handle); | |
1562 | out: | |
1563 | return ret; | |
1564 | } | |
1565 | ||
c1631d4a TY |
1566 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
1567 | { | |
1568 | int i; | |
1569 | struct ocfs2_extent_rec *rec = NULL; | |
1570 | ||
1571 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
1572 | ||
1573 | rec = &el->l_recs[i]; | |
1574 | ||
1575 | if (le32_to_cpu(rec->e_cpos) < pos) | |
1576 | break; | |
1577 | } | |
1578 | ||
1579 | return i; | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | * Helper to calculate the punching pos and length in one run, we handle the | |
1584 | * following three cases in order: | |
1585 | * | |
1586 | * - remove the entire record | |
1587 | * - remove a partial record | |
1588 | * - no record needs to be removed (hole-punching completed) | |
1589 | */ | |
1590 | static void ocfs2_calc_trunc_pos(struct inode *inode, | |
1591 | struct ocfs2_extent_list *el, | |
1592 | struct ocfs2_extent_rec *rec, | |
1593 | u32 trunc_start, u32 *trunc_cpos, | |
1594 | u32 *trunc_len, u32 *trunc_end, | |
1595 | u64 *blkno, int *done) | |
1596 | { | |
1597 | int ret = 0; | |
1598 | u32 coff, range; | |
1599 | ||
1600 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); | |
1601 | ||
1602 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { | |
9a790ba1 TY |
1603 | /* |
1604 | * remove an entire extent record. | |
1605 | */ | |
c1631d4a TY |
1606 | *trunc_cpos = le32_to_cpu(rec->e_cpos); |
1607 | /* | |
1608 | * Skip holes if any. | |
1609 | */ | |
1610 | if (range < *trunc_end) | |
1611 | *trunc_end = range; | |
1612 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); | |
1613 | *blkno = le64_to_cpu(rec->e_blkno); | |
1614 | *trunc_end = le32_to_cpu(rec->e_cpos); | |
1615 | } else if (range > trunc_start) { | |
9a790ba1 TY |
1616 | /* |
1617 | * remove a partial extent record, which means we're | |
1618 | * removing the last extent record. | |
1619 | */ | |
c1631d4a | 1620 | *trunc_cpos = trunc_start; |
9a790ba1 TY |
1621 | /* |
1622 | * skip hole if any. | |
1623 | */ | |
1624 | if (range < *trunc_end) | |
1625 | *trunc_end = range; | |
c1631d4a TY |
1626 | *trunc_len = *trunc_end - trunc_start; |
1627 | coff = trunc_start - le32_to_cpu(rec->e_cpos); | |
1628 | *blkno = le64_to_cpu(rec->e_blkno) + | |
1629 | ocfs2_clusters_to_blocks(inode->i_sb, coff); | |
1630 | *trunc_end = trunc_start; | |
1631 | } else { | |
1632 | /* | |
1633 | * It may have two following possibilities: | |
1634 | * | |
1635 | * - last record has been removed | |
1636 | * - trunc_start was within a hole | |
1637 | * | |
1638 | * both two cases mean the completion of hole punching. | |
1639 | */ | |
1640 | ret = 1; | |
1641 | } | |
1642 | ||
1643 | *done = ret; | |
1644 | } | |
1645 | ||
063c4561 MF |
1646 | static int ocfs2_remove_inode_range(struct inode *inode, |
1647 | struct buffer_head *di_bh, u64 byte_start, | |
1648 | u64 byte_len) | |
1649 | { | |
c1631d4a TY |
1650 | int ret = 0, flags = 0, done = 0, i; |
1651 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; | |
1652 | u32 cluster_in_el; | |
063c4561 MF |
1653 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1654 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
b1967d0e | 1655 | struct address_space *mapping = inode->i_mapping; |
fecc0112 | 1656 | struct ocfs2_extent_tree et; |
c1631d4a TY |
1657 | struct ocfs2_path *path = NULL; |
1658 | struct ocfs2_extent_list *el = NULL; | |
1659 | struct ocfs2_extent_rec *rec = NULL; | |
e8aec068 | 1660 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
c1631d4a | 1661 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
063c4561 | 1662 | |
5e404e9e | 1663 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
063c4561 MF |
1664 | ocfs2_init_dealloc_ctxt(&dealloc); |
1665 | ||
468eedde TM |
1666 | trace_ocfs2_remove_inode_range( |
1667 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1668 | (unsigned long long)byte_start, | |
1669 | (unsigned long long)byte_len); | |
1670 | ||
063c4561 MF |
1671 | if (byte_len == 0) |
1672 | return 0; | |
1673 | ||
1afc32b9 MF |
1674 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
1675 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, | |
b1967d0e MF |
1676 | byte_start + byte_len, 0); |
1677 | if (ret) { | |
1afc32b9 | 1678 | mlog_errno(ret); |
b1967d0e MF |
1679 | goto out; |
1680 | } | |
1681 | /* | |
1682 | * There's no need to get fancy with the page cache | |
1683 | * truncate of an inline-data inode. We're talking | |
1684 | * about less than a page here, which will be cached | |
1685 | * in the dinode buffer anyway. | |
1686 | */ | |
1687 | unmap_mapping_range(mapping, 0, 0, 0); | |
1688 | truncate_inode_pages(mapping, 0); | |
1689 | goto out; | |
1afc32b9 MF |
1690 | } |
1691 | ||
e8aec068 TY |
1692 | /* |
1693 | * For reflinks, we may need to CoW 2 clusters which might be | |
1694 | * partially zero'd later, if hole's start and end offset were | |
1695 | * within one cluster(means is not exactly aligned to clustersize). | |
1696 | */ | |
1697 | ||
1698 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { | |
1699 | ||
1700 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start); | |
1701 | if (ret) { | |
1702 | mlog_errno(ret); | |
1703 | goto out; | |
1704 | } | |
1705 | ||
1706 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len); | |
1707 | if (ret) { | |
1708 | mlog_errno(ret); | |
1709 | goto out; | |
1710 | } | |
1711 | } | |
1712 | ||
063c4561 | 1713 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
c1631d4a TY |
1714 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
1715 | cluster_in_el = trunc_end; | |
063c4561 | 1716 | |
063c4561 MF |
1717 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); |
1718 | if (ret) { | |
1719 | mlog_errno(ret); | |
1720 | goto out; | |
1721 | } | |
1722 | ||
c1631d4a TY |
1723 | path = ocfs2_new_path_from_et(&et); |
1724 | if (!path) { | |
1725 | ret = -ENOMEM; | |
1726 | mlog_errno(ret); | |
1727 | goto out; | |
1728 | } | |
1729 | ||
1730 | while (trunc_end > trunc_start) { | |
1731 | ||
1732 | ret = ocfs2_find_path(INODE_CACHE(inode), path, | |
1733 | cluster_in_el); | |
063c4561 MF |
1734 | if (ret) { |
1735 | mlog_errno(ret); | |
1736 | goto out; | |
1737 | } | |
1738 | ||
c1631d4a | 1739 | el = path_leaf_el(path); |
063c4561 | 1740 | |
c1631d4a TY |
1741 | i = ocfs2_find_rec(el, trunc_end); |
1742 | /* | |
1743 | * Need to go to previous extent block. | |
1744 | */ | |
1745 | if (i < 0) { | |
1746 | if (path->p_tree_depth == 0) | |
1747 | break; | |
063c4561 | 1748 | |
c1631d4a TY |
1749 | ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, |
1750 | path, | |
1751 | &cluster_in_el); | |
063c4561 MF |
1752 | if (ret) { |
1753 | mlog_errno(ret); | |
1754 | goto out; | |
1755 | } | |
c1631d4a TY |
1756 | |
1757 | /* | |
1758 | * We've reached the leftmost extent block, | |
1759 | * it's safe to leave. | |
1760 | */ | |
1761 | if (cluster_in_el == 0) | |
1762 | break; | |
1763 | ||
1764 | /* | |
1765 | * The 'pos' searched for previous extent block is | |
1766 | * always one cluster less than actual trunc_end. | |
1767 | */ | |
1768 | trunc_end = cluster_in_el + 1; | |
1769 | ||
1770 | ocfs2_reinit_path(path, 1); | |
1771 | ||
1772 | continue; | |
1773 | ||
1774 | } else | |
1775 | rec = &el->l_recs[i]; | |
1776 | ||
1777 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos, | |
1778 | &trunc_len, &trunc_end, &blkno, &done); | |
1779 | if (done) | |
1780 | break; | |
1781 | ||
1782 | flags = rec->e_flags; | |
1783 | phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno); | |
1784 | ||
1785 | ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos, | |
1786 | phys_cpos, trunc_len, flags, | |
1787 | &dealloc, refcount_loc); | |
1788 | if (ret < 0) { | |
1789 | mlog_errno(ret); | |
1790 | goto out; | |
063c4561 MF |
1791 | } |
1792 | ||
c1631d4a TY |
1793 | cluster_in_el = trunc_end; |
1794 | ||
1795 | ocfs2_reinit_path(path, 1); | |
063c4561 MF |
1796 | } |
1797 | ||
1798 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); | |
1799 | ||
1800 | out: | |
7aebff18 | 1801 | ocfs2_free_path(path); |
063c4561 MF |
1802 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1803 | ocfs2_run_deallocs(osb, &dealloc); | |
1804 | ||
1805 | return ret; | |
1806 | } | |
1807 | ||
b2580103 MF |
1808 | /* |
1809 | * Parts of this function taken from xfs_change_file_space() | |
1810 | */ | |
385820a3 MF |
1811 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
1812 | loff_t f_pos, unsigned int cmd, | |
1813 | struct ocfs2_space_resv *sr, | |
1814 | int change_size) | |
b2580103 MF |
1815 | { |
1816 | int ret; | |
1817 | s64 llen; | |
385820a3 | 1818 | loff_t size; |
b2580103 MF |
1819 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1820 | struct buffer_head *di_bh = NULL; | |
1821 | handle_t *handle; | |
a00cce35 | 1822 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
b2580103 | 1823 | |
b2580103 MF |
1824 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
1825 | return -EROFS; | |
1826 | ||
1827 | mutex_lock(&inode->i_mutex); | |
1828 | ||
1829 | /* | |
1830 | * This prevents concurrent writes on other nodes | |
1831 | */ | |
1832 | ret = ocfs2_rw_lock(inode, 1); | |
1833 | if (ret) { | |
1834 | mlog_errno(ret); | |
1835 | goto out; | |
1836 | } | |
1837 | ||
e63aecb6 | 1838 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
b2580103 MF |
1839 | if (ret) { |
1840 | mlog_errno(ret); | |
1841 | goto out_rw_unlock; | |
1842 | } | |
1843 | ||
1844 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { | |
1845 | ret = -EPERM; | |
e63aecb6 | 1846 | goto out_inode_unlock; |
b2580103 MF |
1847 | } |
1848 | ||
1849 | switch (sr->l_whence) { | |
1850 | case 0: /*SEEK_SET*/ | |
1851 | break; | |
1852 | case 1: /*SEEK_CUR*/ | |
385820a3 | 1853 | sr->l_start += f_pos; |
b2580103 MF |
1854 | break; |
1855 | case 2: /*SEEK_END*/ | |
1856 | sr->l_start += i_size_read(inode); | |
1857 | break; | |
1858 | default: | |
1859 | ret = -EINVAL; | |
e63aecb6 | 1860 | goto out_inode_unlock; |
b2580103 MF |
1861 | } |
1862 | sr->l_whence = 0; | |
1863 | ||
1864 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; | |
1865 | ||
1866 | if (sr->l_start < 0 | |
1867 | || sr->l_start > max_off | |
1868 | || (sr->l_start + llen) < 0 | |
1869 | || (sr->l_start + llen) > max_off) { | |
1870 | ret = -EINVAL; | |
e63aecb6 | 1871 | goto out_inode_unlock; |
b2580103 | 1872 | } |
385820a3 | 1873 | size = sr->l_start + sr->l_len; |
b2580103 | 1874 | |
a2a3b398 TS |
1875 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64 || |
1876 | cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) { | |
b2580103 MF |
1877 | if (sr->l_len <= 0) { |
1878 | ret = -EINVAL; | |
e63aecb6 | 1879 | goto out_inode_unlock; |
b2580103 MF |
1880 | } |
1881 | } | |
1882 | ||
385820a3 | 1883 | if (file && should_remove_suid(file->f_path.dentry)) { |
b2580103 MF |
1884 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
1885 | if (ret) { | |
1886 | mlog_errno(ret); | |
e63aecb6 | 1887 | goto out_inode_unlock; |
b2580103 MF |
1888 | } |
1889 | } | |
1890 | ||
1891 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1892 | switch (cmd) { | |
1893 | case OCFS2_IOC_RESVSP: | |
1894 | case OCFS2_IOC_RESVSP64: | |
1895 | /* | |
1896 | * This takes unsigned offsets, but the signed ones we | |
1897 | * pass have been checked against overflow above. | |
1898 | */ | |
1899 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, | |
1900 | sr->l_len); | |
1901 | break; | |
1902 | case OCFS2_IOC_UNRESVSP: | |
1903 | case OCFS2_IOC_UNRESVSP64: | |
1904 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, | |
1905 | sr->l_len); | |
1906 | break; | |
1907 | default: | |
1908 | ret = -EINVAL; | |
1909 | } | |
1910 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1911 | if (ret) { | |
1912 | mlog_errno(ret); | |
e63aecb6 | 1913 | goto out_inode_unlock; |
b2580103 MF |
1914 | } |
1915 | ||
1916 | /* | |
1917 | * We update c/mtime for these changes | |
1918 | */ | |
1919 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1920 | if (IS_ERR(handle)) { | |
1921 | ret = PTR_ERR(handle); | |
1922 | mlog_errno(ret); | |
e63aecb6 | 1923 | goto out_inode_unlock; |
b2580103 MF |
1924 | } |
1925 | ||
385820a3 MF |
1926 | if (change_size && i_size_read(inode) < size) |
1927 | i_size_write(inode, size); | |
1928 | ||
b2580103 MF |
1929 | inode->i_ctime = inode->i_mtime = CURRENT_TIME; |
1930 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); | |
1931 | if (ret < 0) | |
1932 | mlog_errno(ret); | |
1933 | ||
a4e08d00 | 1934 | if (file && (file->f_flags & O_SYNC)) |
df295d4a MF |
1935 | handle->h_sync = 1; |
1936 | ||
b2580103 MF |
1937 | ocfs2_commit_trans(osb, handle); |
1938 | ||
e63aecb6 | 1939 | out_inode_unlock: |
b2580103 | 1940 | brelse(di_bh); |
e63aecb6 | 1941 | ocfs2_inode_unlock(inode, 1); |
b2580103 MF |
1942 | out_rw_unlock: |
1943 | ocfs2_rw_unlock(inode, 1); | |
1944 | ||
b2580103 | 1945 | out: |
c259ae52 | 1946 | mutex_unlock(&inode->i_mutex); |
b2580103 MF |
1947 | return ret; |
1948 | } | |
1949 | ||
385820a3 MF |
1950 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
1951 | struct ocfs2_space_resv *sr) | |
1952 | { | |
496ad9aa | 1953 | struct inode *inode = file_inode(file); |
c19a28e1 | 1954 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
fef6925c | 1955 | int ret; |
385820a3 MF |
1956 | |
1957 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && | |
1958 | !ocfs2_writes_unwritten_extents(osb)) | |
1959 | return -ENOTTY; | |
1960 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && | |
1961 | !ocfs2_sparse_alloc(osb)) | |
1962 | return -ENOTTY; | |
1963 | ||
1964 | if (!S_ISREG(inode->i_mode)) | |
1965 | return -EINVAL; | |
1966 | ||
1967 | if (!(file->f_mode & FMODE_WRITE)) | |
1968 | return -EBADF; | |
1969 | ||
fef6925c JK |
1970 | ret = mnt_want_write_file(file); |
1971 | if (ret) | |
1972 | return ret; | |
1973 | ret = __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); | |
1974 | mnt_drop_write_file(file); | |
1975 | return ret; | |
385820a3 MF |
1976 | } |
1977 | ||
2fe17c10 | 1978 | static long ocfs2_fallocate(struct file *file, int mode, loff_t offset, |
385820a3 MF |
1979 | loff_t len) |
1980 | { | |
496ad9aa | 1981 | struct inode *inode = file_inode(file); |
385820a3 MF |
1982 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1983 | struct ocfs2_space_resv sr; | |
1984 | int change_size = 1; | |
db47fef2 | 1985 | int cmd = OCFS2_IOC_RESVSP64; |
385820a3 | 1986 | |
64c23e86 CH |
1987 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
1988 | return -EOPNOTSUPP; | |
385820a3 MF |
1989 | if (!ocfs2_writes_unwritten_extents(osb)) |
1990 | return -EOPNOTSUPP; | |
1991 | ||
385820a3 MF |
1992 | if (mode & FALLOC_FL_KEEP_SIZE) |
1993 | change_size = 0; | |
1994 | ||
db47fef2 JB |
1995 | if (mode & FALLOC_FL_PUNCH_HOLE) |
1996 | cmd = OCFS2_IOC_UNRESVSP64; | |
1997 | ||
385820a3 MF |
1998 | sr.l_whence = 0; |
1999 | sr.l_start = (s64)offset; | |
2000 | sr.l_len = (s64)len; | |
2001 | ||
db47fef2 JB |
2002 | return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr, |
2003 | change_size); | |
385820a3 MF |
2004 | } |
2005 | ||
293b2f70 TM |
2006 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
2007 | size_t count) | |
2008 | { | |
2009 | int ret = 0; | |
2010 | unsigned int extent_flags; | |
2011 | u32 cpos, clusters, extent_len, phys_cpos; | |
2012 | struct super_block *sb = inode->i_sb; | |
2013 | ||
2014 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || | |
2f48d593 TM |
2015 | !(OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) || |
2016 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) | |
293b2f70 TM |
2017 | return 0; |
2018 | ||
2019 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
2020 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
2021 | ||
2022 | while (clusters) { | |
2023 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, | |
2024 | &extent_flags); | |
2025 | if (ret < 0) { | |
2026 | mlog_errno(ret); | |
2027 | goto out; | |
2028 | } | |
2029 | ||
2030 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { | |
2031 | ret = 1; | |
2032 | break; | |
2033 | } | |
2034 | ||
2035 | if (extent_len > clusters) | |
2036 | extent_len = clusters; | |
2037 | ||
2038 | clusters -= extent_len; | |
2039 | cpos += extent_len; | |
2040 | } | |
2041 | out: | |
2042 | return ret; | |
2043 | } | |
2044 | ||
a11f7e63 MF |
2045 | static void ocfs2_aiodio_wait(struct inode *inode) |
2046 | { | |
2047 | wait_queue_head_t *wq = ocfs2_ioend_wq(inode); | |
2048 | ||
2049 | wait_event(*wq, (atomic_read(&OCFS2_I(inode)->ip_unaligned_aio) == 0)); | |
2050 | } | |
2051 | ||
2052 | static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos) | |
2053 | { | |
2054 | int blockmask = inode->i_sb->s_blocksize - 1; | |
2055 | loff_t final_size = pos + count; | |
2056 | ||
2057 | if ((pos & blockmask) || (final_size & blockmask)) | |
2058 | return 1; | |
2059 | return 0; | |
2060 | } | |
2061 | ||
293b2f70 | 2062 | static int ocfs2_prepare_inode_for_refcount(struct inode *inode, |
b8908236 | 2063 | struct file *file, |
293b2f70 TM |
2064 | loff_t pos, size_t count, |
2065 | int *meta_level) | |
2066 | { | |
2067 | int ret; | |
2068 | struct buffer_head *di_bh = NULL; | |
2069 | u32 cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
2070 | u32 clusters = | |
2071 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; | |
2072 | ||
2073 | ret = ocfs2_inode_lock(inode, &di_bh, 1); | |
2074 | if (ret) { | |
2075 | mlog_errno(ret); | |
2076 | goto out; | |
2077 | } | |
2078 | ||
2079 | *meta_level = 1; | |
2080 | ||
c7dd3392 | 2081 | ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX); |
293b2f70 TM |
2082 | if (ret) |
2083 | mlog_errno(ret); | |
2084 | out: | |
2085 | brelse(di_bh); | |
2086 | return ret; | |
2087 | } | |
2088 | ||
b8908236 | 2089 | static int ocfs2_prepare_inode_for_write(struct file *file, |
8659ac25 TY |
2090 | loff_t *ppos, |
2091 | size_t count, | |
9517bac6 | 2092 | int appending, |
86470e98 TM |
2093 | int *direct_io, |
2094 | int *has_refcount) | |
ccd979bd | 2095 | { |
65ed39d6 | 2096 | int ret = 0, meta_level = 0; |
b8908236 | 2097 | struct dentry *dentry = file->f_path.dentry; |
8659ac25 | 2098 | struct inode *inode = dentry->d_inode; |
468eedde | 2099 | loff_t saved_pos = 0, end; |
ccd979bd | 2100 | |
2bd63216 | 2101 | /* |
65ed39d6 MF |
2102 | * We start with a read level meta lock and only jump to an ex |
2103 | * if we need to make modifications here. | |
ccd979bd | 2104 | */ |
ccd979bd | 2105 | for(;;) { |
e63aecb6 | 2106 | ret = ocfs2_inode_lock(inode, NULL, meta_level); |
ccd979bd MF |
2107 | if (ret < 0) { |
2108 | meta_level = -1; | |
2109 | mlog_errno(ret); | |
2110 | goto out; | |
2111 | } | |
2112 | ||
2113 | /* Clear suid / sgid if necessary. We do this here | |
2114 | * instead of later in the write path because | |
2115 | * remove_suid() calls ->setattr without any hint that | |
2116 | * we may have already done our cluster locking. Since | |
2117 | * ocfs2_setattr() *must* take cluster locks to | |
42b2aa86 | 2118 | * proceed, this will lead us to recursively lock the |
ccd979bd MF |
2119 | * inode. There's also the dinode i_size state which |
2120 | * can be lost via setattr during extending writes (we | |
2121 | * set inode->i_size at the end of a write. */ | |
8659ac25 | 2122 | if (should_remove_suid(dentry)) { |
ccd979bd | 2123 | if (meta_level == 0) { |
e63aecb6 | 2124 | ocfs2_inode_unlock(inode, meta_level); |
ccd979bd MF |
2125 | meta_level = 1; |
2126 | continue; | |
2127 | } | |
2128 | ||
2129 | ret = ocfs2_write_remove_suid(inode); | |
2130 | if (ret < 0) { | |
2131 | mlog_errno(ret); | |
8659ac25 | 2132 | goto out_unlock; |
ccd979bd MF |
2133 | } |
2134 | } | |
2135 | ||
2136 | /* work on a copy of ppos until we're sure that we won't have | |
2137 | * to recalculate it due to relocking. */ | |
468eedde | 2138 | if (appending) |
ccd979bd | 2139 | saved_pos = i_size_read(inode); |
468eedde | 2140 | else |
8659ac25 | 2141 | saved_pos = *ppos; |
3a0782d0 | 2142 | |
65ed39d6 | 2143 | end = saved_pos + count; |
9517bac6 | 2144 | |
293b2f70 TM |
2145 | ret = ocfs2_check_range_for_refcount(inode, saved_pos, count); |
2146 | if (ret == 1) { | |
2147 | ocfs2_inode_unlock(inode, meta_level); | |
2148 | meta_level = -1; | |
2149 | ||
2150 | ret = ocfs2_prepare_inode_for_refcount(inode, | |
b8908236 | 2151 | file, |
293b2f70 TM |
2152 | saved_pos, |
2153 | count, | |
2154 | &meta_level); | |
86470e98 TM |
2155 | if (has_refcount) |
2156 | *has_refcount = 1; | |
96a1cc73 WW |
2157 | if (direct_io) |
2158 | *direct_io = 0; | |
293b2f70 TM |
2159 | } |
2160 | ||
2161 | if (ret < 0) { | |
2162 | mlog_errno(ret); | |
2163 | goto out_unlock; | |
2164 | } | |
2165 | ||
65ed39d6 MF |
2166 | /* |
2167 | * Skip the O_DIRECT checks if we don't need | |
2168 | * them. | |
2169 | */ | |
2170 | if (!direct_io || !(*direct_io)) | |
9517bac6 | 2171 | break; |
9517bac6 | 2172 | |
1afc32b9 MF |
2173 | /* |
2174 | * There's no sane way to do direct writes to an inode | |
2175 | * with inline data. | |
2176 | */ | |
2177 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2178 | *direct_io = 0; | |
2179 | break; | |
2180 | } | |
2181 | ||
3a0782d0 | 2182 | /* |
65ed39d6 MF |
2183 | * Allowing concurrent direct writes means |
2184 | * i_size changes wouldn't be synchronized, so | |
2185 | * one node could wind up truncating another | |
2186 | * nodes writes. | |
3a0782d0 | 2187 | */ |
65ed39d6 MF |
2188 | if (end > i_size_read(inode)) { |
2189 | *direct_io = 0; | |
ccd979bd | 2190 | break; |
ccd979bd MF |
2191 | } |
2192 | ||
65ed39d6 MF |
2193 | /* |
2194 | * We don't fill holes during direct io, so | |
2195 | * check for them here. If any are found, the | |
2196 | * caller will have to retake some cluster | |
2197 | * locks and initiate the io as buffered. | |
2198 | */ | |
2199 | ret = ocfs2_check_range_for_holes(inode, saved_pos, count); | |
2200 | if (ret == 1) { | |
2201 | *direct_io = 0; | |
2202 | ret = 0; | |
2203 | } else if (ret < 0) | |
2204 | mlog_errno(ret); | |
ccd979bd MF |
2205 | break; |
2206 | } | |
2207 | ||
8659ac25 TY |
2208 | if (appending) |
2209 | *ppos = saved_pos; | |
2210 | ||
2211 | out_unlock: | |
468eedde TM |
2212 | trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno, |
2213 | saved_pos, appending, count, | |
2214 | direct_io, has_refcount); | |
2215 | ||
293b2f70 TM |
2216 | if (meta_level >= 0) |
2217 | ocfs2_inode_unlock(inode, meta_level); | |
8659ac25 TY |
2218 | |
2219 | out: | |
2220 | return ret; | |
2221 | } | |
2222 | ||
2223 | static ssize_t ocfs2_file_aio_write(struct kiocb *iocb, | |
2224 | const struct iovec *iov, | |
2225 | unsigned long nr_segs, | |
2226 | loff_t pos) | |
2227 | { | |
9517bac6 | 2228 | int ret, direct_io, appending, rw_level, have_alloc_sem = 0; |
86470e98 | 2229 | int can_do_direct, has_refcount = 0; |
9517bac6 MF |
2230 | ssize_t written = 0; |
2231 | size_t ocount; /* original count */ | |
2232 | size_t count; /* after file limit checks */ | |
9ea2d32f MF |
2233 | loff_t old_size, *ppos = &iocb->ki_pos; |
2234 | u32 old_clusters; | |
9517bac6 | 2235 | struct file *file = iocb->ki_filp; |
496ad9aa | 2236 | struct inode *inode = file_inode(file); |
9ea2d32f | 2237 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
7bdb0d18 TY |
2238 | int full_coherency = !(osb->s_mount_opt & |
2239 | OCFS2_MOUNT_COHERENCY_BUFFERED); | |
a11f7e63 | 2240 | int unaligned_dio = 0; |
9517bac6 | 2241 | |
468eedde TM |
2242 | trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry, |
2243 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
2244 | file->f_path.dentry->d_name.len, | |
2245 | file->f_path.dentry->d_name.name, | |
2246 | (unsigned int)nr_segs); | |
8659ac25 | 2247 | |
73a7075e | 2248 | if (iocb->ki_nbytes == 0) |
8659ac25 TY |
2249 | return 0; |
2250 | ||
9517bac6 MF |
2251 | appending = file->f_flags & O_APPEND ? 1 : 0; |
2252 | direct_io = file->f_flags & O_DIRECT ? 1 : 0; | |
2253 | ||
8659ac25 | 2254 | mutex_lock(&inode->i_mutex); |
9517bac6 | 2255 | |
39c99f12 TY |
2256 | ocfs2_iocb_clear_sem_locked(iocb); |
2257 | ||
9517bac6 | 2258 | relock: |
bd5fe6c5 | 2259 | /* to match setattr's i_mutex -> rw_lock ordering */ |
9517bac6 | 2260 | if (direct_io) { |
9517bac6 | 2261 | have_alloc_sem = 1; |
39c99f12 TY |
2262 | /* communicate with ocfs2_dio_end_io */ |
2263 | ocfs2_iocb_set_sem_locked(iocb); | |
8659ac25 TY |
2264 | } |
2265 | ||
7bdb0d18 TY |
2266 | /* |
2267 | * Concurrent O_DIRECT writes are allowed with | |
2268 | * mount_option "coherency=buffered". | |
2269 | */ | |
2270 | rw_level = (!direct_io || full_coherency); | |
2271 | ||
8659ac25 TY |
2272 | ret = ocfs2_rw_lock(inode, rw_level); |
2273 | if (ret < 0) { | |
8659ac25 | 2274 | mlog_errno(ret); |
9517bac6 | 2275 | goto out_sems; |
8659ac25 TY |
2276 | } |
2277 | ||
7bdb0d18 TY |
2278 | /* |
2279 | * O_DIRECT writes with "coherency=full" need to take EX cluster | |
2280 | * inode_lock to guarantee coherency. | |
2281 | */ | |
2282 | if (direct_io && full_coherency) { | |
2283 | /* | |
2284 | * We need to take and drop the inode lock to force | |
2285 | * other nodes to drop their caches. Buffered I/O | |
2286 | * already does this in write_begin(). | |
2287 | */ | |
2288 | ret = ocfs2_inode_lock(inode, NULL, 1); | |
2289 | if (ret < 0) { | |
2290 | mlog_errno(ret); | |
afe1bb73 | 2291 | goto out; |
7bdb0d18 TY |
2292 | } |
2293 | ||
2294 | ocfs2_inode_unlock(inode, 1); | |
2295 | } | |
2296 | ||
9517bac6 | 2297 | can_do_direct = direct_io; |
b8908236 | 2298 | ret = ocfs2_prepare_inode_for_write(file, ppos, |
73a7075e | 2299 | iocb->ki_nbytes, appending, |
86470e98 | 2300 | &can_do_direct, &has_refcount); |
8659ac25 TY |
2301 | if (ret < 0) { |
2302 | mlog_errno(ret); | |
2303 | goto out; | |
2304 | } | |
ccd979bd | 2305 | |
a11f7e63 | 2306 | if (direct_io && !is_sync_kiocb(iocb)) |
73a7075e | 2307 | unaligned_dio = ocfs2_is_io_unaligned(inode, iocb->ki_nbytes, |
a11f7e63 MF |
2308 | *ppos); |
2309 | ||
9517bac6 MF |
2310 | /* |
2311 | * We can't complete the direct I/O as requested, fall back to | |
2312 | * buffered I/O. | |
2313 | */ | |
2314 | if (direct_io && !can_do_direct) { | |
2315 | ocfs2_rw_unlock(inode, rw_level); | |
9517bac6 MF |
2316 | |
2317 | have_alloc_sem = 0; | |
2318 | rw_level = -1; | |
2319 | ||
2320 | direct_io = 0; | |
9517bac6 MF |
2321 | goto relock; |
2322 | } | |
2323 | ||
a11f7e63 MF |
2324 | if (unaligned_dio) { |
2325 | /* | |
2326 | * Wait on previous unaligned aio to complete before | |
2327 | * proceeding. | |
2328 | */ | |
2329 | ocfs2_aiodio_wait(inode); | |
2330 | ||
2331 | /* Mark the iocb as needing a decrement in ocfs2_dio_end_io */ | |
2332 | atomic_inc(&OCFS2_I(inode)->ip_unaligned_aio); | |
2333 | ocfs2_iocb_set_unaligned_aio(iocb); | |
2334 | } | |
2335 | ||
9ea2d32f MF |
2336 | /* |
2337 | * To later detect whether a journal commit for sync writes is | |
2338 | * necessary, we sample i_size, and cluster count here. | |
2339 | */ | |
2340 | old_size = i_size_read(inode); | |
2341 | old_clusters = OCFS2_I(inode)->ip_clusters; | |
2342 | ||
ccd979bd | 2343 | /* communicate with ocfs2_dio_end_io */ |
7cdfc3a1 | 2344 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd | 2345 | |
6b933c8e LD |
2346 | ret = generic_segment_checks(iov, &nr_segs, &ocount, |
2347 | VERIFY_READ); | |
2348 | if (ret) | |
2349 | goto out_dio; | |
b6af1bcd | 2350 | |
6b933c8e LD |
2351 | count = ocount; |
2352 | ret = generic_write_checks(file, ppos, &count, | |
2353 | S_ISBLK(inode->i_mode)); | |
2354 | if (ret) | |
2355 | goto out_dio; | |
b6af1bcd | 2356 | |
6b933c8e | 2357 | if (direct_io) { |
9517bac6 MF |
2358 | written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos, |
2359 | ppos, count, ocount); | |
2360 | if (written < 0) { | |
2361 | ret = written; | |
2362 | goto out_dio; | |
2363 | } | |
2364 | } else { | |
6b933c8e LD |
2365 | current->backing_dev_info = file->f_mapping->backing_dev_info; |
2366 | written = generic_file_buffered_write(iocb, iov, nr_segs, *ppos, | |
2367 | ppos, count, 0); | |
2368 | current->backing_dev_info = NULL; | |
9517bac6 | 2369 | } |
ccd979bd | 2370 | |
9517bac6 | 2371 | out_dio: |
ccd979bd | 2372 | /* buffered aio wouldn't have proper lock coverage today */ |
9517bac6 | 2373 | BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT)); |
ccd979bd | 2374 | |
60c48674 | 2375 | if (((file->f_flags & O_DSYNC) && !direct_io) || IS_SYNC(inode) || |
81c8c82b | 2376 | ((file->f_flags & O_DIRECT) && !direct_io)) { |
918941a3 JK |
2377 | ret = filemap_fdatawrite_range(file->f_mapping, pos, |
2378 | pos + count - 1); | |
2379 | if (ret < 0) | |
2380 | written = ret; | |
2381 | ||
a03ab788 CL |
2382 | if (!ret && ((old_size != i_size_read(inode)) || |
2383 | (old_clusters != OCFS2_I(inode)->ip_clusters) || | |
2384 | has_refcount)) { | |
2b4e30fb | 2385 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
9ea2d32f MF |
2386 | if (ret < 0) |
2387 | written = ret; | |
2388 | } | |
918941a3 JK |
2389 | |
2390 | if (!ret) | |
2391 | ret = filemap_fdatawait_range(file->f_mapping, pos, | |
2392 | pos + count - 1); | |
9ea2d32f MF |
2393 | } |
2394 | ||
2bd63216 | 2395 | /* |
ccd979bd MF |
2396 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
2397 | * function pointer which is called when o_direct io completes so that | |
bd5fe6c5 | 2398 | * it can unlock our rw lock. |
ccd979bd MF |
2399 | * Unfortunately there are error cases which call end_io and others |
2400 | * that don't. so we don't have to unlock the rw_lock if either an | |
2401 | * async dio is going to do it in the future or an end_io after an | |
2402 | * error has already done it. | |
2403 | */ | |
66b116c9 | 2404 | if ((ret == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { |
ccd979bd MF |
2405 | rw_level = -1; |
2406 | have_alloc_sem = 0; | |
a11f7e63 | 2407 | unaligned_dio = 0; |
ccd979bd MF |
2408 | } |
2409 | ||
3e5d3c35 JB |
2410 | if (unaligned_dio) { |
2411 | ocfs2_iocb_clear_unaligned_aio(iocb); | |
a11f7e63 | 2412 | atomic_dec(&OCFS2_I(inode)->ip_unaligned_aio); |
3e5d3c35 | 2413 | } |
a11f7e63 | 2414 | |
ccd979bd | 2415 | out: |
9517bac6 MF |
2416 | if (rw_level != -1) |
2417 | ocfs2_rw_unlock(inode, rw_level); | |
2418 | ||
2419 | out_sems: | |
df2d6f26 | 2420 | if (have_alloc_sem) |
39c99f12 | 2421 | ocfs2_iocb_clear_sem_locked(iocb); |
9517bac6 | 2422 | |
1b1dcc1b | 2423 | mutex_unlock(&inode->i_mutex); |
ccd979bd | 2424 | |
812e7a6a WW |
2425 | if (written) |
2426 | ret = written; | |
812e7a6a | 2427 | return ret; |
ccd979bd MF |
2428 | } |
2429 | ||
328eaaba MS |
2430 | static int ocfs2_splice_to_file(struct pipe_inode_info *pipe, |
2431 | struct file *out, | |
2432 | struct splice_desc *sd) | |
2433 | { | |
2434 | int ret; | |
2435 | ||
b8908236 | 2436 | ret = ocfs2_prepare_inode_for_write(out, &sd->pos, |
86470e98 | 2437 | sd->total_len, 0, NULL, NULL); |
328eaaba MS |
2438 | if (ret < 0) { |
2439 | mlog_errno(ret); | |
2440 | return ret; | |
2441 | } | |
2442 | ||
2443 | return splice_from_pipe_feed(pipe, sd, pipe_to_file); | |
2444 | } | |
2445 | ||
8659ac25 TY |
2446 | static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe, |
2447 | struct file *out, | |
2448 | loff_t *ppos, | |
2449 | size_t len, | |
2450 | unsigned int flags) | |
2451 | { | |
2452 | int ret; | |
328eaaba MS |
2453 | struct address_space *mapping = out->f_mapping; |
2454 | struct inode *inode = mapping->host; | |
2455 | struct splice_desc sd = { | |
2456 | .total_len = len, | |
2457 | .flags = flags, | |
2458 | .pos = *ppos, | |
2459 | .u.file = out, | |
2460 | }; | |
8659ac25 | 2461 | |
468eedde TM |
2462 | |
2463 | trace_ocfs2_file_splice_write(inode, out, out->f_path.dentry, | |
2464 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
2465 | out->f_path.dentry->d_name.len, | |
2466 | out->f_path.dentry->d_name.name, len); | |
8659ac25 | 2467 | |
72b0d9aa | 2468 | pipe_lock(pipe); |
8659ac25 | 2469 | |
328eaaba MS |
2470 | splice_from_pipe_begin(&sd); |
2471 | do { | |
2472 | ret = splice_from_pipe_next(pipe, &sd); | |
2473 | if (ret <= 0) | |
2474 | break; | |
8659ac25 | 2475 | |
328eaaba MS |
2476 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); |
2477 | ret = ocfs2_rw_lock(inode, 1); | |
2478 | if (ret < 0) | |
2479 | mlog_errno(ret); | |
2480 | else { | |
2481 | ret = ocfs2_splice_to_file(pipe, out, &sd); | |
2482 | ocfs2_rw_unlock(inode, 1); | |
2483 | } | |
2484 | mutex_unlock(&inode->i_mutex); | |
2485 | } while (ret > 0); | |
2486 | splice_from_pipe_end(pipe, &sd); | |
8659ac25 | 2487 | |
72b0d9aa | 2488 | pipe_unlock(pipe); |
8659ac25 | 2489 | |
328eaaba MS |
2490 | if (sd.num_spliced) |
2491 | ret = sd.num_spliced; | |
2492 | ||
2493 | if (ret > 0) { | |
d23c937b | 2494 | int err; |
328eaaba | 2495 | |
d23c937b JK |
2496 | err = generic_write_sync(out, *ppos, ret); |
2497 | if (err) | |
2498 | ret = err; | |
2499 | else | |
2500 | *ppos += ret; | |
328eaaba | 2501 | |
d0e1d66b | 2502 | balance_dirty_pages_ratelimited(mapping); |
328eaaba | 2503 | } |
8659ac25 | 2504 | |
8659ac25 TY |
2505 | return ret; |
2506 | } | |
2507 | ||
2508 | static ssize_t ocfs2_file_splice_read(struct file *in, | |
2509 | loff_t *ppos, | |
2510 | struct pipe_inode_info *pipe, | |
2511 | size_t len, | |
2512 | unsigned int flags) | |
2513 | { | |
1962f39a | 2514 | int ret = 0, lock_level = 0; |
496ad9aa | 2515 | struct inode *inode = file_inode(in); |
8659ac25 | 2516 | |
468eedde TM |
2517 | trace_ocfs2_file_splice_read(inode, in, in->f_path.dentry, |
2518 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
2519 | in->f_path.dentry->d_name.len, | |
2520 | in->f_path.dentry->d_name.name, len); | |
8659ac25 TY |
2521 | |
2522 | /* | |
2523 | * See the comment in ocfs2_file_aio_read() | |
2524 | */ | |
182be684 | 2525 | ret = ocfs2_inode_lock_atime(inode, in->f_path.mnt, &lock_level); |
8659ac25 TY |
2526 | if (ret < 0) { |
2527 | mlog_errno(ret); | |
2528 | goto bail; | |
2529 | } | |
1962f39a | 2530 | ocfs2_inode_unlock(inode, lock_level); |
8659ac25 TY |
2531 | |
2532 | ret = generic_file_splice_read(in, ppos, pipe, len, flags); | |
2533 | ||
2534 | bail: | |
8659ac25 TY |
2535 | return ret; |
2536 | } | |
2537 | ||
ccd979bd | 2538 | static ssize_t ocfs2_file_aio_read(struct kiocb *iocb, |
027445c3 BP |
2539 | const struct iovec *iov, |
2540 | unsigned long nr_segs, | |
ccd979bd MF |
2541 | loff_t pos) |
2542 | { | |
25899dee | 2543 | int ret = 0, rw_level = -1, have_alloc_sem = 0, lock_level = 0; |
ccd979bd | 2544 | struct file *filp = iocb->ki_filp; |
496ad9aa | 2545 | struct inode *inode = file_inode(filp); |
ccd979bd | 2546 | |
468eedde TM |
2547 | trace_ocfs2_file_aio_read(inode, filp, filp->f_path.dentry, |
2548 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
2549 | filp->f_path.dentry->d_name.len, | |
2550 | filp->f_path.dentry->d_name.name, nr_segs); | |
2551 | ||
ccd979bd MF |
2552 | |
2553 | if (!inode) { | |
2554 | ret = -EINVAL; | |
2555 | mlog_errno(ret); | |
2556 | goto bail; | |
2557 | } | |
2558 | ||
39c99f12 TY |
2559 | ocfs2_iocb_clear_sem_locked(iocb); |
2560 | ||
2bd63216 | 2561 | /* |
ccd979bd MF |
2562 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
2563 | * need locks to protect pending reads from racing with truncate. | |
2564 | */ | |
2565 | if (filp->f_flags & O_DIRECT) { | |
ccd979bd | 2566 | have_alloc_sem = 1; |
39c99f12 | 2567 | ocfs2_iocb_set_sem_locked(iocb); |
ccd979bd MF |
2568 | |
2569 | ret = ocfs2_rw_lock(inode, 0); | |
2570 | if (ret < 0) { | |
2571 | mlog_errno(ret); | |
2572 | goto bail; | |
2573 | } | |
2574 | rw_level = 0; | |
2575 | /* communicate with ocfs2_dio_end_io */ | |
7cdfc3a1 | 2576 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd MF |
2577 | } |
2578 | ||
c4374f8a MF |
2579 | /* |
2580 | * We're fine letting folks race truncates and extending | |
2581 | * writes with read across the cluster, just like they can | |
2582 | * locally. Hence no rw_lock during read. | |
2bd63216 | 2583 | * |
c4374f8a MF |
2584 | * Take and drop the meta data lock to update inode fields |
2585 | * like i_size. This allows the checks down below | |
2bd63216 | 2586 | * generic_file_aio_read() a chance of actually working. |
c4374f8a | 2587 | */ |
182be684 | 2588 | ret = ocfs2_inode_lock_atime(inode, filp->f_path.mnt, &lock_level); |
c4374f8a MF |
2589 | if (ret < 0) { |
2590 | mlog_errno(ret); | |
2591 | goto bail; | |
2592 | } | |
e63aecb6 | 2593 | ocfs2_inode_unlock(inode, lock_level); |
c4374f8a | 2594 | |
027445c3 | 2595 | ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos); |
468eedde | 2596 | trace_generic_file_aio_read_ret(ret); |
ccd979bd MF |
2597 | |
2598 | /* buffered aio wouldn't have proper lock coverage today */ | |
2599 | BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT)); | |
2600 | ||
2601 | /* see ocfs2_file_aio_write */ | |
2602 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { | |
2603 | rw_level = -1; | |
2604 | have_alloc_sem = 0; | |
2605 | } | |
2606 | ||
2607 | bail: | |
df2d6f26 | 2608 | if (have_alloc_sem) |
39c99f12 | 2609 | ocfs2_iocb_clear_sem_locked(iocb); |
df2d6f26 | 2610 | |
2bd63216 | 2611 | if (rw_level != -1) |
ccd979bd | 2612 | ocfs2_rw_unlock(inode, rw_level); |
ccd979bd MF |
2613 | |
2614 | return ret; | |
2615 | } | |
2616 | ||
93862d5e | 2617 | /* Refer generic_file_llseek_unlocked() */ |
965c8e59 | 2618 | static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence) |
93862d5e SM |
2619 | { |
2620 | struct inode *inode = file->f_mapping->host; | |
2621 | int ret = 0; | |
2622 | ||
2623 | mutex_lock(&inode->i_mutex); | |
2624 | ||
965c8e59 | 2625 | switch (whence) { |
93862d5e SM |
2626 | case SEEK_SET: |
2627 | break; | |
2628 | case SEEK_END: | |
2629 | offset += inode->i_size; | |
2630 | break; | |
2631 | case SEEK_CUR: | |
2632 | if (offset == 0) { | |
2633 | offset = file->f_pos; | |
2634 | goto out; | |
2635 | } | |
2636 | offset += file->f_pos; | |
2637 | break; | |
2638 | case SEEK_DATA: | |
2639 | case SEEK_HOLE: | |
965c8e59 | 2640 | ret = ocfs2_seek_data_hole_offset(file, &offset, whence); |
93862d5e SM |
2641 | if (ret) |
2642 | goto out; | |
2643 | break; | |
2644 | default: | |
2645 | ret = -EINVAL; | |
2646 | goto out; | |
2647 | } | |
2648 | ||
46a1c2c7 | 2649 | offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes); |
93862d5e SM |
2650 | |
2651 | out: | |
2652 | mutex_unlock(&inode->i_mutex); | |
2653 | if (ret) | |
2654 | return ret; | |
2655 | return offset; | |
2656 | } | |
2657 | ||
92e1d5be | 2658 | const struct inode_operations ocfs2_file_iops = { |
ccd979bd MF |
2659 | .setattr = ocfs2_setattr, |
2660 | .getattr = ocfs2_getattr, | |
d38eb8db | 2661 | .permission = ocfs2_permission, |
cf1d6c76 TY |
2662 | .setxattr = generic_setxattr, |
2663 | .getxattr = generic_getxattr, | |
2664 | .listxattr = ocfs2_listxattr, | |
2665 | .removexattr = generic_removexattr, | |
00dc417f | 2666 | .fiemap = ocfs2_fiemap, |
4e34e719 | 2667 | .get_acl = ocfs2_iop_get_acl, |
702e5bc6 | 2668 | .set_acl = ocfs2_iop_set_acl, |
ccd979bd MF |
2669 | }; |
2670 | ||
92e1d5be | 2671 | const struct inode_operations ocfs2_special_file_iops = { |
ccd979bd MF |
2672 | .setattr = ocfs2_setattr, |
2673 | .getattr = ocfs2_getattr, | |
d38eb8db | 2674 | .permission = ocfs2_permission, |
4e34e719 | 2675 | .get_acl = ocfs2_iop_get_acl, |
702e5bc6 | 2676 | .set_acl = ocfs2_iop_set_acl, |
ccd979bd MF |
2677 | }; |
2678 | ||
53da4939 MF |
2679 | /* |
2680 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with | |
2681 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! | |
2682 | */ | |
4b6f5d20 | 2683 | const struct file_operations ocfs2_fops = { |
93862d5e | 2684 | .llseek = ocfs2_file_llseek, |
ccd979bd MF |
2685 | .read = do_sync_read, |
2686 | .write = do_sync_write, | |
ccd979bd MF |
2687 | .mmap = ocfs2_mmap, |
2688 | .fsync = ocfs2_sync_file, | |
2689 | .release = ocfs2_file_release, | |
2690 | .open = ocfs2_file_open, | |
2691 | .aio_read = ocfs2_file_aio_read, | |
2692 | .aio_write = ocfs2_file_aio_write, | |
c9ec1488 | 2693 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2694 | #ifdef CONFIG_COMPAT |
2695 | .compat_ioctl = ocfs2_compat_ioctl, | |
2696 | #endif | |
53da4939 | 2697 | .lock = ocfs2_lock, |
53fc622b | 2698 | .flock = ocfs2_flock, |
8659ac25 TY |
2699 | .splice_read = ocfs2_file_splice_read, |
2700 | .splice_write = ocfs2_file_splice_write, | |
2fe17c10 | 2701 | .fallocate = ocfs2_fallocate, |
ccd979bd MF |
2702 | }; |
2703 | ||
4b6f5d20 | 2704 | const struct file_operations ocfs2_dops = { |
32c3c0e2 | 2705 | .llseek = generic_file_llseek, |
ccd979bd | 2706 | .read = generic_read_dir, |
3704412b | 2707 | .iterate = ocfs2_readdir, |
ccd979bd | 2708 | .fsync = ocfs2_sync_file, |
53fc622b MF |
2709 | .release = ocfs2_dir_release, |
2710 | .open = ocfs2_dir_open, | |
c9ec1488 | 2711 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2712 | #ifdef CONFIG_COMPAT |
2713 | .compat_ioctl = ocfs2_compat_ioctl, | |
53da4939 MF |
2714 | #endif |
2715 | .lock = ocfs2_lock, | |
2716 | .flock = ocfs2_flock, | |
2717 | }; | |
2718 | ||
2719 | /* | |
2720 | * POSIX-lockless variants of our file_operations. | |
2721 | * | |
2722 | * These will be used if the underlying cluster stack does not support | |
2723 | * posix file locking, if the user passes the "localflocks" mount | |
2724 | * option, or if we have a local-only fs. | |
2725 | * | |
2726 | * ocfs2_flock is in here because all stacks handle UNIX file locks, | |
2727 | * so we still want it in the case of no stack support for | |
2728 | * plocks. Internally, it will do the right thing when asked to ignore | |
2729 | * the cluster. | |
2730 | */ | |
2731 | const struct file_operations ocfs2_fops_no_plocks = { | |
93862d5e | 2732 | .llseek = ocfs2_file_llseek, |
53da4939 MF |
2733 | .read = do_sync_read, |
2734 | .write = do_sync_write, | |
2735 | .mmap = ocfs2_mmap, | |
2736 | .fsync = ocfs2_sync_file, | |
2737 | .release = ocfs2_file_release, | |
2738 | .open = ocfs2_file_open, | |
2739 | .aio_read = ocfs2_file_aio_read, | |
2740 | .aio_write = ocfs2_file_aio_write, | |
2741 | .unlocked_ioctl = ocfs2_ioctl, | |
2742 | #ifdef CONFIG_COMPAT | |
2743 | .compat_ioctl = ocfs2_compat_ioctl, | |
2744 | #endif | |
2745 | .flock = ocfs2_flock, | |
2746 | .splice_read = ocfs2_file_splice_read, | |
2747 | .splice_write = ocfs2_file_splice_write, | |
3d1c1829 | 2748 | .fallocate = ocfs2_fallocate, |
53da4939 MF |
2749 | }; |
2750 | ||
2751 | const struct file_operations ocfs2_dops_no_plocks = { | |
2752 | .llseek = generic_file_llseek, | |
2753 | .read = generic_read_dir, | |
3704412b | 2754 | .iterate = ocfs2_readdir, |
53da4939 MF |
2755 | .fsync = ocfs2_sync_file, |
2756 | .release = ocfs2_dir_release, | |
2757 | .open = ocfs2_dir_open, | |
2758 | .unlocked_ioctl = ocfs2_ioctl, | |
2759 | #ifdef CONFIG_COMPAT | |
2760 | .compat_ioctl = ocfs2_compat_ioctl, | |
586d232b | 2761 | #endif |
53fc622b | 2762 | .flock = ocfs2_flock, |
ccd979bd | 2763 | }; |