Commit | Line | Data |
---|---|---|
328970de | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ccd979bd MF |
2 | /* -*- mode: c; c-basic-offset: 8; -*- |
3 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
4 | * | |
5 | * file.c | |
6 | * | |
7 | * File open, close, extend, truncate | |
8 | * | |
9 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
ccd979bd MF |
10 | */ |
11 | ||
16f7e0fe | 12 | #include <linux/capability.h> |
ccd979bd MF |
13 | #include <linux/fs.h> |
14 | #include <linux/types.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/highmem.h> | |
17 | #include <linux/pagemap.h> | |
18 | #include <linux/uio.h> | |
e2057c5a | 19 | #include <linux/sched.h> |
d6b29d7c | 20 | #include <linux/splice.h> |
7f1a37e3 | 21 | #include <linux/mount.h> |
9517bac6 | 22 | #include <linux/writeback.h> |
385820a3 | 23 | #include <linux/falloc.h> |
a90714c1 | 24 | #include <linux/quotaops.h> |
04eda1a1 | 25 | #include <linux/blkdev.h> |
66114cad | 26 | #include <linux/backing-dev.h> |
ccd979bd | 27 | |
ccd979bd MF |
28 | #include <cluster/masklog.h> |
29 | ||
30 | #include "ocfs2.h" | |
31 | ||
32 | #include "alloc.h" | |
33 | #include "aops.h" | |
34 | #include "dir.h" | |
35 | #include "dlmglue.h" | |
36 | #include "extent_map.h" | |
37 | #include "file.h" | |
38 | #include "sysfile.h" | |
39 | #include "inode.h" | |
ca4d147e | 40 | #include "ioctl.h" |
ccd979bd | 41 | #include "journal.h" |
53fc622b | 42 | #include "locks.h" |
ccd979bd MF |
43 | #include "mmap.h" |
44 | #include "suballoc.h" | |
45 | #include "super.h" | |
cf1d6c76 | 46 | #include "xattr.h" |
23fc2702 | 47 | #include "acl.h" |
a90714c1 | 48 | #include "quota.h" |
293b2f70 | 49 | #include "refcounttree.h" |
468eedde | 50 | #include "ocfs2_trace.h" |
ccd979bd MF |
51 | |
52 | #include "buffer_head_io.h" | |
53 | ||
53fc622b MF |
54 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
55 | { | |
56 | struct ocfs2_file_private *fp; | |
57 | ||
58 | fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL); | |
59 | if (!fp) | |
60 | return -ENOMEM; | |
61 | ||
62 | fp->fp_file = file; | |
63 | mutex_init(&fp->fp_mutex); | |
64 | ocfs2_file_lock_res_init(&fp->fp_flock, fp); | |
65 | file->private_data = fp; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | static void ocfs2_free_file_private(struct inode *inode, struct file *file) | |
71 | { | |
72 | struct ocfs2_file_private *fp = file->private_data; | |
73 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
74 | ||
75 | if (fp) { | |
76 | ocfs2_simple_drop_lockres(osb, &fp->fp_flock); | |
77 | ocfs2_lock_res_free(&fp->fp_flock); | |
78 | kfree(fp); | |
79 | file->private_data = NULL; | |
80 | } | |
81 | } | |
82 | ||
ccd979bd MF |
83 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
84 | { | |
85 | int status; | |
86 | int mode = file->f_flags; | |
87 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
88 | ||
468eedde | 89 | trace_ocfs2_file_open(inode, file, file->f_path.dentry, |
d324cd4c | 90 | (unsigned long long)oi->ip_blkno, |
468eedde TM |
91 | file->f_path.dentry->d_name.len, |
92 | file->f_path.dentry->d_name.name, mode); | |
ccd979bd | 93 | |
9c89fe0a JK |
94 | if (file->f_mode & FMODE_WRITE) { |
95 | status = dquot_initialize(inode); | |
96 | if (status) | |
97 | goto leave; | |
98 | } | |
907f4554 | 99 | |
ccd979bd MF |
100 | spin_lock(&oi->ip_lock); |
101 | ||
102 | /* Check that the inode hasn't been wiped from disk by another | |
103 | * node. If it hasn't then we're safe as long as we hold the | |
104 | * spin lock until our increment of open count. */ | |
d324cd4c | 105 | if (oi->ip_flags & OCFS2_INODE_DELETED) { |
ccd979bd MF |
106 | spin_unlock(&oi->ip_lock); |
107 | ||
108 | status = -ENOENT; | |
109 | goto leave; | |
110 | } | |
111 | ||
112 | if (mode & O_DIRECT) | |
113 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; | |
114 | ||
115 | oi->ip_open_count++; | |
116 | spin_unlock(&oi->ip_lock); | |
53fc622b MF |
117 | |
118 | status = ocfs2_init_file_private(inode, file); | |
119 | if (status) { | |
120 | /* | |
121 | * We want to set open count back if we're failing the | |
122 | * open. | |
123 | */ | |
124 | spin_lock(&oi->ip_lock); | |
125 | oi->ip_open_count--; | |
126 | spin_unlock(&oi->ip_lock); | |
127 | } | |
128 | ||
c4c2416a GH |
129 | file->f_mode |= FMODE_NOWAIT; |
130 | ||
ccd979bd | 131 | leave: |
ccd979bd MF |
132 | return status; |
133 | } | |
134 | ||
135 | static int ocfs2_file_release(struct inode *inode, struct file *file) | |
136 | { | |
137 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
138 | ||
ccd979bd MF |
139 | spin_lock(&oi->ip_lock); |
140 | if (!--oi->ip_open_count) | |
141 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; | |
468eedde TM |
142 | |
143 | trace_ocfs2_file_release(inode, file, file->f_path.dentry, | |
144 | oi->ip_blkno, | |
145 | file->f_path.dentry->d_name.len, | |
146 | file->f_path.dentry->d_name.name, | |
147 | oi->ip_open_count); | |
ccd979bd MF |
148 | spin_unlock(&oi->ip_lock); |
149 | ||
53fc622b MF |
150 | ocfs2_free_file_private(inode, file); |
151 | ||
ccd979bd MF |
152 | return 0; |
153 | } | |
154 | ||
53fc622b MF |
155 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
156 | { | |
157 | return ocfs2_init_file_private(inode, file); | |
158 | } | |
159 | ||
160 | static int ocfs2_dir_release(struct inode *inode, struct file *file) | |
161 | { | |
162 | ocfs2_free_file_private(inode, file); | |
163 | return 0; | |
164 | } | |
165 | ||
02c24a82 JB |
166 | static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end, |
167 | int datasync) | |
ccd979bd MF |
168 | { |
169 | int err = 0; | |
7ea80859 | 170 | struct inode *inode = file->f_mapping->host; |
ccd979bd | 171 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2931cdcb DW |
172 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
173 | journal_t *journal = osb->journal->j_journal; | |
174 | int ret; | |
175 | tid_t commit_tid; | |
176 | bool needs_barrier = false; | |
ccd979bd | 177 | |
468eedde | 178 | trace_ocfs2_sync_file(inode, file, file->f_path.dentry, |
d324cd4c | 179 | oi->ip_blkno, |
468eedde TM |
180 | file->f_path.dentry->d_name.len, |
181 | file->f_path.dentry->d_name.name, | |
182 | (unsigned long long)datasync); | |
ccd979bd | 183 | |
a987c7ca YL |
184 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
185 | return -EROFS; | |
186 | ||
3b49c9a1 | 187 | err = file_write_and_wait_range(file, start, end); |
02c24a82 JB |
188 | if (err) |
189 | return err; | |
190 | ||
2931cdcb DW |
191 | commit_tid = datasync ? oi->i_datasync_tid : oi->i_sync_tid; |
192 | if (journal->j_flags & JBD2_BARRIER && | |
193 | !jbd2_trans_will_send_data_barrier(journal, commit_tid)) | |
194 | needs_barrier = true; | |
195 | err = jbd2_complete_transaction(journal, commit_tid); | |
196 | if (needs_barrier) { | |
c6bf3f0e | 197 | ret = blkdev_issue_flush(inode->i_sb->s_bdev); |
2931cdcb DW |
198 | if (!err) |
199 | err = ret; | |
04eda1a1 | 200 | } |
e04cc15f | 201 | |
c1e8d35e TM |
202 | if (err) |
203 | mlog_errno(err); | |
ccd979bd MF |
204 | |
205 | return (err < 0) ? -EIO : 0; | |
206 | } | |
207 | ||
7f1a37e3 TY |
208 | int ocfs2_should_update_atime(struct inode *inode, |
209 | struct vfsmount *vfsmnt) | |
210 | { | |
95582b00 | 211 | struct timespec64 now; |
7f1a37e3 TY |
212 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
213 | ||
214 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
215 | return 0; | |
216 | ||
217 | if ((inode->i_flags & S_NOATIME) || | |
1751e8a6 | 218 | ((inode->i_sb->s_flags & SB_NODIRATIME) && S_ISDIR(inode->i_mode))) |
7f1a37e3 TY |
219 | return 0; |
220 | ||
6c2aad05 MF |
221 | /* |
222 | * We can be called with no vfsmnt structure - NFSD will | |
223 | * sometimes do this. | |
224 | * | |
225 | * Note that our action here is different than touch_atime() - | |
226 | * if we can't tell whether this is a noatime mount, then we | |
227 | * don't know whether to trust the value of s_atime_quantum. | |
228 | */ | |
229 | if (vfsmnt == NULL) | |
230 | return 0; | |
231 | ||
7f1a37e3 TY |
232 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
233 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
234 | return 0; | |
235 | ||
7e913c53 | 236 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
95582b00 DD |
237 | if ((timespec64_compare(&inode->i_atime, &inode->i_mtime) <= 0) || |
238 | (timespec64_compare(&inode->i_atime, &inode->i_ctime) <= 0)) | |
7e913c53 MF |
239 | return 1; |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
078cd827 | 244 | now = current_time(inode); |
7f1a37e3 TY |
245 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) |
246 | return 0; | |
247 | else | |
248 | return 1; | |
249 | } | |
250 | ||
251 | int ocfs2_update_inode_atime(struct inode *inode, | |
252 | struct buffer_head *bh) | |
253 | { | |
254 | int ret; | |
255 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
256 | handle_t *handle; | |
c11e9faf | 257 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
7f1a37e3 | 258 | |
7f1a37e3 | 259 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
260 | if (IS_ERR(handle)) { |
261 | ret = PTR_ERR(handle); | |
7f1a37e3 TY |
262 | mlog_errno(ret); |
263 | goto out; | |
264 | } | |
265 | ||
0cf2f763 | 266 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 267 | OCFS2_JOURNAL_ACCESS_WRITE); |
c11e9faf MF |
268 | if (ret) { |
269 | mlog_errno(ret); | |
270 | goto out_commit; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Don't use ocfs2_mark_inode_dirty() here as we don't always | |
275 | * have i_mutex to guard against concurrent changes to other | |
276 | * inode fields. | |
277 | */ | |
078cd827 | 278 | inode->i_atime = current_time(inode); |
c11e9faf MF |
279 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
280 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); | |
6fdb702d | 281 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
ec20cec7 | 282 | ocfs2_journal_dirty(handle, bh); |
7f1a37e3 | 283 | |
c11e9faf | 284 | out_commit: |
1119d3c0 | 285 | ocfs2_commit_trans(osb, handle); |
7f1a37e3 | 286 | out: |
7f1a37e3 TY |
287 | return ret; |
288 | } | |
289 | ||
026749a8 | 290 | int ocfs2_set_inode_size(handle_t *handle, |
6cb129f5 AB |
291 | struct inode *inode, |
292 | struct buffer_head *fe_bh, | |
293 | u64 new_i_size) | |
ccd979bd MF |
294 | { |
295 | int status; | |
296 | ||
ccd979bd | 297 | i_size_write(inode, new_i_size); |
8110b073 | 298 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
078cd827 | 299 | inode->i_ctime = inode->i_mtime = current_time(inode); |
ccd979bd MF |
300 | |
301 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
302 | if (status < 0) { | |
303 | mlog_errno(status); | |
304 | goto bail; | |
305 | } | |
306 | ||
307 | bail: | |
ccd979bd MF |
308 | return status; |
309 | } | |
310 | ||
9e33d69f JK |
311 | int ocfs2_simple_size_update(struct inode *inode, |
312 | struct buffer_head *di_bh, | |
313 | u64 new_i_size) | |
ccd979bd MF |
314 | { |
315 | int ret; | |
316 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 317 | handle_t *handle = NULL; |
ccd979bd | 318 | |
65eff9cc | 319 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
320 | if (IS_ERR(handle)) { |
321 | ret = PTR_ERR(handle); | |
ccd979bd MF |
322 | mlog_errno(ret); |
323 | goto out; | |
324 | } | |
325 | ||
326 | ret = ocfs2_set_inode_size(handle, inode, di_bh, | |
327 | new_i_size); | |
328 | if (ret < 0) | |
329 | mlog_errno(ret); | |
330 | ||
6fdb702d | 331 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
02dc1af4 | 332 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
333 | out: |
334 | return ret; | |
335 | } | |
336 | ||
37f8a2bf TM |
337 | static int ocfs2_cow_file_pos(struct inode *inode, |
338 | struct buffer_head *fe_bh, | |
339 | u64 offset) | |
340 | { | |
341 | int status; | |
342 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
343 | unsigned int num_clusters = 0; | |
344 | unsigned int ext_flags = 0; | |
345 | ||
346 | /* | |
347 | * If the new offset is aligned to the range of the cluster, there is | |
348 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to | |
349 | * CoW either. | |
350 | */ | |
351 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) | |
352 | return 0; | |
353 | ||
354 | status = ocfs2_get_clusters(inode, cpos, &phys, | |
355 | &num_clusters, &ext_flags); | |
356 | if (status) { | |
357 | mlog_errno(status); | |
358 | goto out; | |
359 | } | |
360 | ||
361 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
362 | goto out; | |
363 | ||
c7dd3392 | 364 | return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1); |
37f8a2bf TM |
365 | |
366 | out: | |
367 | return status; | |
368 | } | |
369 | ||
ccd979bd MF |
370 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
371 | struct inode *inode, | |
372 | struct buffer_head *fe_bh, | |
373 | u64 new_i_size) | |
374 | { | |
375 | int status; | |
1fabe148 | 376 | handle_t *handle; |
60b11392 | 377 | struct ocfs2_dinode *di; |
35edec1d | 378 | u64 cluster_bytes; |
ccd979bd | 379 | |
37f8a2bf TM |
380 | /* |
381 | * We need to CoW the cluster contains the offset if it is reflinked | |
382 | * since we will call ocfs2_zero_range_for_truncate later which will | |
383 | * write "0" from offset to the end of the cluster. | |
384 | */ | |
385 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); | |
386 | if (status) { | |
387 | mlog_errno(status); | |
388 | return status; | |
389 | } | |
390 | ||
ccd979bd MF |
391 | /* TODO: This needs to actually orphan the inode in this |
392 | * transaction. */ | |
393 | ||
65eff9cc | 394 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ccd979bd MF |
395 | if (IS_ERR(handle)) { |
396 | status = PTR_ERR(handle); | |
397 | mlog_errno(status); | |
398 | goto out; | |
399 | } | |
400 | ||
0cf2f763 | 401 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
13723d00 | 402 | OCFS2_JOURNAL_ACCESS_WRITE); |
60b11392 MF |
403 | if (status < 0) { |
404 | mlog_errno(status); | |
405 | goto out_commit; | |
406 | } | |
407 | ||
408 | /* | |
409 | * Do this before setting i_size. | |
410 | */ | |
35edec1d MF |
411 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
412 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, | |
413 | cluster_bytes); | |
60b11392 MF |
414 | if (status) { |
415 | mlog_errno(status); | |
416 | goto out_commit; | |
417 | } | |
418 | ||
419 | i_size_write(inode, new_i_size); | |
078cd827 | 420 | inode->i_ctime = inode->i_mtime = current_time(inode); |
60b11392 MF |
421 | |
422 | di = (struct ocfs2_dinode *) fe_bh->b_data; | |
423 | di->i_size = cpu_to_le64(new_i_size); | |
424 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); | |
425 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
6fdb702d | 426 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
60b11392 | 427 | |
ec20cec7 | 428 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 429 | |
60b11392 | 430 | out_commit: |
02dc1af4 | 431 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 432 | out: |
ccd979bd MF |
433 | return status; |
434 | } | |
435 | ||
026749a8 | 436 | int ocfs2_truncate_file(struct inode *inode, |
ccd979bd MF |
437 | struct buffer_head *di_bh, |
438 | u64 new_i_size) | |
439 | { | |
440 | int status = 0; | |
441 | struct ocfs2_dinode *fe = NULL; | |
442 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
ccd979bd | 443 | |
b657c95c JB |
444 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
445 | * already validated it */ | |
ccd979bd | 446 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
ccd979bd | 447 | |
468eedde TM |
448 | trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno, |
449 | (unsigned long long)le64_to_cpu(fe->i_size), | |
450 | (unsigned long long)new_i_size); | |
451 | ||
ccd979bd | 452 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), |
b0697053 MF |
453 | "Inode %llu, inode i_size = %lld != di " |
454 | "i_size = %llu, i_flags = 0x%x\n", | |
455 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ccd979bd | 456 | i_size_read(inode), |
b0697053 MF |
457 | (unsigned long long)le64_to_cpu(fe->i_size), |
458 | le32_to_cpu(fe->i_flags)); | |
ccd979bd MF |
459 | |
460 | if (new_i_size > le64_to_cpu(fe->i_size)) { | |
468eedde TM |
461 | trace_ocfs2_truncate_file_error( |
462 | (unsigned long long)le64_to_cpu(fe->i_size), | |
463 | (unsigned long long)new_i_size); | |
ccd979bd MF |
464 | status = -EINVAL; |
465 | mlog_errno(status); | |
466 | goto bail; | |
467 | } | |
468 | ||
2e89b2e4 MF |
469 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
470 | ||
4fe370af MF |
471 | ocfs2_resv_discard(&osb->osb_la_resmap, |
472 | &OCFS2_I(inode)->ip_la_data_resv); | |
473 | ||
c934a92d MF |
474 | /* |
475 | * The inode lock forced other nodes to sync and drop their | |
476 | * pages, which (correctly) happens even if we have a truncate | |
477 | * without allocation change - ocfs2 cluster sizes can be much | |
478 | * greater than page size, so we have to truncate them | |
479 | * anyway. | |
480 | */ | |
2e89b2e4 MF |
481 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
482 | truncate_inode_pages(inode->i_mapping, new_i_size); | |
483 | ||
1afc32b9 MF |
484 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
485 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, | |
b1967d0e | 486 | i_size_read(inode), 1); |
1afc32b9 MF |
487 | if (status) |
488 | mlog_errno(status); | |
489 | ||
c934a92d | 490 | goto bail_unlock_sem; |
1afc32b9 MF |
491 | } |
492 | ||
ccd979bd MF |
493 | /* alright, we're going to need to do a full blown alloc size |
494 | * change. Orphan the inode so that recovery can complete the | |
495 | * truncate if necessary. This does the task of marking | |
496 | * i_size. */ | |
497 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); | |
498 | if (status < 0) { | |
499 | mlog_errno(status); | |
c934a92d | 500 | goto bail_unlock_sem; |
ccd979bd MF |
501 | } |
502 | ||
78f94673 | 503 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
ccd979bd MF |
504 | if (status < 0) { |
505 | mlog_errno(status); | |
c934a92d | 506 | goto bail_unlock_sem; |
ccd979bd MF |
507 | } |
508 | ||
509 | /* TODO: orphan dir cleanup here. */ | |
c934a92d | 510 | bail_unlock_sem: |
2e89b2e4 MF |
511 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
512 | ||
ccd979bd | 513 | bail: |
8b2c0dba TM |
514 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
515 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
ccd979bd | 516 | |
ccd979bd MF |
517 | return status; |
518 | } | |
519 | ||
520 | /* | |
0eb8d47e | 521 | * extend file allocation only here. |
ccd979bd MF |
522 | * we'll update all the disk stuff, and oip->alloc_size |
523 | * | |
524 | * expect stuff to be locked, a transaction started and enough data / | |
525 | * metadata reservations in the contexts. | |
526 | * | |
527 | * Will return -EAGAIN, and a reason if a restart is needed. | |
528 | * If passed in, *reason will always be set, even in error. | |
529 | */ | |
0eb8d47e TM |
530 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
531 | struct inode *inode, | |
532 | u32 *logical_offset, | |
533 | u32 clusters_to_add, | |
534 | int mark_unwritten, | |
535 | struct buffer_head *fe_bh, | |
536 | handle_t *handle, | |
537 | struct ocfs2_alloc_context *data_ac, | |
538 | struct ocfs2_alloc_context *meta_ac, | |
539 | enum ocfs2_alloc_restarted *reason_ret) | |
ccd979bd | 540 | { |
f99b9b7c JB |
541 | int ret; |
542 | struct ocfs2_extent_tree et; | |
ccd979bd | 543 | |
5e404e9e | 544 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
cbee7e1a JB |
545 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
546 | clusters_to_add, mark_unwritten, | |
547 | data_ac, meta_ac, reason_ret); | |
f99b9b7c JB |
548 | |
549 | return ret; | |
ccd979bd MF |
550 | } |
551 | ||
5bc55d65 JG |
552 | static int ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
553 | u32 clusters_to_add, int mark_unwritten) | |
ccd979bd MF |
554 | { |
555 | int status = 0; | |
556 | int restart_func = 0; | |
abf8b156 | 557 | int credits; |
2ae99a60 | 558 | u32 prev_clusters; |
ccd979bd MF |
559 | struct buffer_head *bh = NULL; |
560 | struct ocfs2_dinode *fe = NULL; | |
1fabe148 | 561 | handle_t *handle = NULL; |
ccd979bd MF |
562 | struct ocfs2_alloc_context *data_ac = NULL; |
563 | struct ocfs2_alloc_context *meta_ac = NULL; | |
696cdf73 | 564 | enum ocfs2_alloc_restarted why = RESTART_NONE; |
ccd979bd | 565 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 566 | struct ocfs2_extent_tree et; |
a90714c1 | 567 | int did_quota = 0; |
ccd979bd | 568 | |
dcd0538f | 569 | /* |
f0cb0f0b | 570 | * Unwritten extent only exists for file systems which |
dcd0538f MF |
571 | * support holes. |
572 | */ | |
2ae99a60 | 573 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
dcd0538f | 574 | |
b657c95c | 575 | status = ocfs2_read_inode_block(inode, &bh); |
ccd979bd MF |
576 | if (status < 0) { |
577 | mlog_errno(status); | |
578 | goto leave; | |
579 | } | |
ccd979bd | 580 | fe = (struct ocfs2_dinode *) bh->b_data; |
ccd979bd MF |
581 | |
582 | restart_all: | |
583 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); | |
584 | ||
5e404e9e | 585 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
f99b9b7c JB |
586 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
587 | &data_ac, &meta_ac); | |
9517bac6 MF |
588 | if (status) { |
589 | mlog_errno(status); | |
590 | goto leave; | |
591 | } | |
592 | ||
06f9da6e | 593 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list); |
65eff9cc | 594 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
595 | if (IS_ERR(handle)) { |
596 | status = PTR_ERR(handle); | |
597 | handle = NULL; | |
598 | mlog_errno(status); | |
599 | goto leave; | |
600 | } | |
601 | ||
602 | restarted_transaction: | |
468eedde TM |
603 | trace_ocfs2_extend_allocation( |
604 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
605 | (unsigned long long)i_size_read(inode), | |
606 | le32_to_cpu(fe->i_clusters), clusters_to_add, | |
607 | why, restart_func); | |
608 | ||
5dd4056d CH |
609 | status = dquot_alloc_space_nodirty(inode, |
610 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); | |
611 | if (status) | |
a90714c1 | 612 | goto leave; |
a90714c1 JK |
613 | did_quota = 1; |
614 | ||
ccd979bd MF |
615 | /* reserve a write to the file entry early on - that we if we |
616 | * run out of credits in the allocation path, we can still | |
617 | * update i_size. */ | |
0cf2f763 | 618 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 619 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
620 | if (status < 0) { |
621 | mlog_errno(status); | |
622 | goto leave; | |
623 | } | |
624 | ||
625 | prev_clusters = OCFS2_I(inode)->ip_clusters; | |
626 | ||
0eb8d47e TM |
627 | status = ocfs2_add_inode_data(osb, |
628 | inode, | |
629 | &logical_start, | |
630 | clusters_to_add, | |
631 | mark_unwritten, | |
632 | bh, | |
633 | handle, | |
634 | data_ac, | |
635 | meta_ac, | |
636 | &why); | |
ccd979bd MF |
637 | if ((status < 0) && (status != -EAGAIN)) { |
638 | if (status != -ENOSPC) | |
639 | mlog_errno(status); | |
640 | goto leave; | |
641 | } | |
2931cdcb | 642 | ocfs2_update_inode_fsync_trans(handle, inode, 1); |
ec20cec7 | 643 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
644 | |
645 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
646 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); | |
647 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
a90714c1 | 648 | /* Release unused quota reservation */ |
5dd4056d | 649 | dquot_free_space(inode, |
a90714c1 JK |
650 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
651 | did_quota = 0; | |
ccd979bd MF |
652 | |
653 | if (why != RESTART_NONE && clusters_to_add) { | |
654 | if (why == RESTART_META) { | |
ccd979bd | 655 | restart_func = 1; |
79681842 | 656 | status = 0; |
ccd979bd MF |
657 | } else { |
658 | BUG_ON(why != RESTART_TRANS); | |
659 | ||
2b1e55c3 | 660 | status = ocfs2_allocate_extend_trans(handle, 1); |
ccd979bd MF |
661 | if (status < 0) { |
662 | /* handle still has to be committed at | |
663 | * this point. */ | |
664 | status = -ENOMEM; | |
665 | mlog_errno(status); | |
666 | goto leave; | |
667 | } | |
668 | goto restarted_transaction; | |
669 | } | |
670 | } | |
671 | ||
468eedde | 672 | trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno, |
1ca1a111 | 673 | le32_to_cpu(fe->i_clusters), |
468eedde TM |
674 | (unsigned long long)le64_to_cpu(fe->i_size), |
675 | OCFS2_I(inode)->ip_clusters, | |
676 | (unsigned long long)i_size_read(inode)); | |
ccd979bd MF |
677 | |
678 | leave: | |
a90714c1 | 679 | if (status < 0 && did_quota) |
5dd4056d | 680 | dquot_free_space(inode, |
a90714c1 | 681 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
ccd979bd | 682 | if (handle) { |
02dc1af4 | 683 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
684 | handle = NULL; |
685 | } | |
686 | if (data_ac) { | |
687 | ocfs2_free_alloc_context(data_ac); | |
688 | data_ac = NULL; | |
689 | } | |
690 | if (meta_ac) { | |
691 | ocfs2_free_alloc_context(meta_ac); | |
692 | meta_ac = NULL; | |
693 | } | |
694 | if ((!status) && restart_func) { | |
695 | restart_func = 0; | |
696 | goto restart_all; | |
697 | } | |
a81cb88b MF |
698 | brelse(bh); |
699 | bh = NULL; | |
ccd979bd | 700 | |
ccd979bd MF |
701 | return status; |
702 | } | |
703 | ||
a4bfb4cf JB |
704 | /* |
705 | * While a write will already be ordering the data, a truncate will not. | |
706 | * Thus, we need to explicitly order the zeroed pages. | |
707 | */ | |
c7d2cbc3 | 708 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode, |
bbd0f327 JQ |
709 | struct buffer_head *di_bh, |
710 | loff_t start_byte, | |
711 | loff_t length) | |
a4bfb4cf JB |
712 | { |
713 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
714 | handle_t *handle = NULL; | |
715 | int ret = 0; | |
716 | ||
717 | if (!ocfs2_should_order_data(inode)) | |
718 | goto out; | |
719 | ||
720 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
721 | if (IS_ERR(handle)) { | |
722 | ret = -ENOMEM; | |
723 | mlog_errno(ret); | |
724 | goto out; | |
725 | } | |
726 | ||
bbd0f327 | 727 | ret = ocfs2_jbd2_inode_add_write(handle, inode, start_byte, length); |
c7d2cbc3 JB |
728 | if (ret < 0) { |
729 | mlog_errno(ret); | |
730 | goto out; | |
731 | } | |
732 | ||
733 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, | |
734 | OCFS2_JOURNAL_ACCESS_WRITE); | |
735 | if (ret) | |
a4bfb4cf | 736 | mlog_errno(ret); |
6fdb702d | 737 | ocfs2_update_inode_fsync_trans(handle, inode, 1); |
a4bfb4cf JB |
738 | |
739 | out: | |
740 | if (ret) { | |
741 | if (!IS_ERR(handle)) | |
742 | ocfs2_commit_trans(osb, handle); | |
743 | handle = ERR_PTR(ret); | |
744 | } | |
745 | return handle; | |
746 | } | |
747 | ||
ccd979bd MF |
748 | /* Some parts of this taken from generic_cont_expand, which turned out |
749 | * to be too fragile to do exactly what we need without us having to | |
4e02ed4b | 750 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
a4bfb4cf | 751 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
c7d2cbc3 | 752 | u64 abs_to, struct buffer_head *di_bh) |
ccd979bd MF |
753 | { |
754 | struct address_space *mapping = inode->i_mapping; | |
755 | struct page *page; | |
09cbfeaf | 756 | unsigned long index = abs_from >> PAGE_SHIFT; |
f775da2f | 757 | handle_t *handle; |
5453258d | 758 | int ret = 0; |
a4bfb4cf | 759 | unsigned zero_from, zero_to, block_start, block_end; |
c7d2cbc3 | 760 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
ccd979bd | 761 | |
a4bfb4cf | 762 | BUG_ON(abs_from >= abs_to); |
09cbfeaf | 763 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_SHIFT)); |
a4bfb4cf | 764 | BUG_ON(abs_from & (inode->i_blkbits - 1)); |
ccd979bd | 765 | |
bbd0f327 JQ |
766 | handle = ocfs2_zero_start_ordered_transaction(inode, di_bh, |
767 | abs_from, | |
768 | abs_to - abs_from); | |
f775da2f JB |
769 | if (IS_ERR(handle)) { |
770 | ret = PTR_ERR(handle); | |
771 | goto out; | |
772 | } | |
773 | ||
9b4c0ff3 | 774 | page = find_or_create_page(mapping, index, GFP_NOFS); |
ccd979bd MF |
775 | if (!page) { |
776 | ret = -ENOMEM; | |
777 | mlog_errno(ret); | |
f775da2f | 778 | goto out_commit_trans; |
ccd979bd MF |
779 | } |
780 | ||
a4bfb4cf | 781 | /* Get the offsets within the page that we want to zero */ |
09cbfeaf KS |
782 | zero_from = abs_from & (PAGE_SIZE - 1); |
783 | zero_to = abs_to & (PAGE_SIZE - 1); | |
a4bfb4cf | 784 | if (!zero_to) |
09cbfeaf | 785 | zero_to = PAGE_SIZE; |
ccd979bd | 786 | |
468eedde TM |
787 | trace_ocfs2_write_zero_page( |
788 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
789 | (unsigned long long)abs_from, | |
790 | (unsigned long long)abs_to, | |
791 | index, zero_from, zero_to); | |
5693486b | 792 | |
a4bfb4cf JB |
793 | /* We know that zero_from is block aligned */ |
794 | for (block_start = zero_from; block_start < zero_to; | |
795 | block_start = block_end) { | |
93407472 | 796 | block_end = block_start + i_blocksize(inode); |
a4bfb4cf JB |
797 | |
798 | /* | |
ebdec241 CH |
799 | * block_start is block-aligned. Bump it by one to force |
800 | * __block_write_begin and block_commit_write to zero the | |
a4bfb4cf JB |
801 | * whole block. |
802 | */ | |
ebdec241 CH |
803 | ret = __block_write_begin(page, block_start + 1, 0, |
804 | ocfs2_get_block); | |
a4bfb4cf JB |
805 | if (ret < 0) { |
806 | mlog_errno(ret); | |
ccd979bd MF |
807 | goto out_unlock; |
808 | } | |
ccd979bd | 809 | |
a4bfb4cf JB |
810 | |
811 | /* must not update i_size! */ | |
812 | ret = block_commit_write(page, block_start + 1, | |
813 | block_start + 1); | |
814 | if (ret < 0) | |
815 | mlog_errno(ret); | |
816 | else | |
817 | ret = 0; | |
818 | } | |
ccd979bd | 819 | |
f775da2f JB |
820 | /* |
821 | * fs-writeback will release the dirty pages without page lock | |
822 | * whose offset are over inode size, the release happens at | |
823 | * block_write_full_page(). | |
824 | */ | |
825 | i_size_write(inode, abs_to); | |
826 | inode->i_blocks = ocfs2_inode_sector_count(inode); | |
827 | di->i_size = cpu_to_le64((u64)i_size_read(inode)); | |
078cd827 | 828 | inode->i_mtime = inode->i_ctime = current_time(inode); |
f775da2f JB |
829 | di->i_mtime = di->i_ctime = cpu_to_le64(inode->i_mtime.tv_sec); |
830 | di->i_ctime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); | |
831 | di->i_mtime_nsec = di->i_ctime_nsec; | |
c7d2cbc3 | 832 | if (handle) { |
c7d2cbc3 | 833 | ocfs2_journal_dirty(handle, di_bh); |
6fdb702d | 834 | ocfs2_update_inode_fsync_trans(handle, inode, 1); |
c7d2cbc3 | 835 | } |
a4bfb4cf | 836 | |
ccd979bd MF |
837 | out_unlock: |
838 | unlock_page(page); | |
09cbfeaf | 839 | put_page(page); |
f775da2f JB |
840 | out_commit_trans: |
841 | if (handle) | |
842 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
ccd979bd MF |
843 | out: |
844 | return ret; | |
845 | } | |
846 | ||
5693486b JB |
847 | /* |
848 | * Find the next range to zero. We do this in terms of bytes because | |
849 | * that's what ocfs2_zero_extend() wants, and it is dealing with the | |
850 | * pagecache. We may return multiple extents. | |
851 | * | |
852 | * zero_start and zero_end are ocfs2_zero_extend()s current idea of what | |
853 | * needs to be zeroed. range_start and range_end return the next zeroing | |
854 | * range. A subsequent call should pass the previous range_end as its | |
855 | * zero_start. If range_end is 0, there's nothing to do. | |
856 | * | |
857 | * Unwritten extents are skipped over. Refcounted extents are CoWd. | |
858 | */ | |
859 | static int ocfs2_zero_extend_get_range(struct inode *inode, | |
860 | struct buffer_head *di_bh, | |
861 | u64 zero_start, u64 zero_end, | |
862 | u64 *range_start, u64 *range_end) | |
ccd979bd | 863 | { |
5693486b JB |
864 | int rc = 0, needs_cow = 0; |
865 | u32 p_cpos, zero_clusters = 0; | |
866 | u32 zero_cpos = | |
867 | zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
868 | u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end); | |
869 | unsigned int num_clusters = 0; | |
870 | unsigned int ext_flags = 0; | |
ccd979bd | 871 | |
5693486b JB |
872 | while (zero_cpos < last_cpos) { |
873 | rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos, | |
874 | &num_clusters, &ext_flags); | |
875 | if (rc) { | |
876 | mlog_errno(rc); | |
ccd979bd MF |
877 | goto out; |
878 | } | |
879 | ||
5693486b JB |
880 | if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) { |
881 | zero_clusters = num_clusters; | |
882 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
883 | needs_cow = 1; | |
884 | break; | |
885 | } | |
886 | ||
887 | zero_cpos += num_clusters; | |
888 | } | |
889 | if (!zero_clusters) { | |
890 | *range_end = 0; | |
891 | goto out; | |
892 | } | |
893 | ||
894 | while ((zero_cpos + zero_clusters) < last_cpos) { | |
895 | rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters, | |
896 | &p_cpos, &num_clusters, | |
897 | &ext_flags); | |
898 | if (rc) { | |
899 | mlog_errno(rc); | |
900 | goto out; | |
901 | } | |
902 | ||
903 | if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN)) | |
904 | break; | |
905 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
906 | needs_cow = 1; | |
907 | zero_clusters += num_clusters; | |
908 | } | |
909 | if ((zero_cpos + zero_clusters) > last_cpos) | |
910 | zero_clusters = last_cpos - zero_cpos; | |
911 | ||
912 | if (needs_cow) { | |
c7dd3392 | 913 | rc = ocfs2_refcount_cow(inode, di_bh, zero_cpos, |
15502712 | 914 | zero_clusters, UINT_MAX); |
5693486b JB |
915 | if (rc) { |
916 | mlog_errno(rc); | |
917 | goto out; | |
918 | } | |
919 | } | |
920 | ||
921 | *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos); | |
922 | *range_end = ocfs2_clusters_to_bytes(inode->i_sb, | |
923 | zero_cpos + zero_clusters); | |
924 | ||
925 | out: | |
926 | return rc; | |
927 | } | |
928 | ||
929 | /* | |
930 | * Zero one range returned from ocfs2_zero_extend_get_range(). The caller | |
931 | * has made sure that the entire range needs zeroing. | |
932 | */ | |
933 | static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start, | |
c7d2cbc3 | 934 | u64 range_end, struct buffer_head *di_bh) |
5693486b JB |
935 | { |
936 | int rc = 0; | |
937 | u64 next_pos; | |
938 | u64 zero_pos = range_start; | |
939 | ||
468eedde TM |
940 | trace_ocfs2_zero_extend_range( |
941 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
942 | (unsigned long long)range_start, | |
943 | (unsigned long long)range_end); | |
5693486b JB |
944 | BUG_ON(range_start >= range_end); |
945 | ||
946 | while (zero_pos < range_end) { | |
09cbfeaf | 947 | next_pos = (zero_pos & PAGE_MASK) + PAGE_SIZE; |
5693486b JB |
948 | if (next_pos > range_end) |
949 | next_pos = range_end; | |
c7d2cbc3 | 950 | rc = ocfs2_write_zero_page(inode, zero_pos, next_pos, di_bh); |
5693486b JB |
951 | if (rc < 0) { |
952 | mlog_errno(rc); | |
953 | break; | |
954 | } | |
955 | zero_pos = next_pos; | |
e2057c5a MF |
956 | |
957 | /* | |
958 | * Very large extends have the potential to lock up | |
959 | * the cpu for extended periods of time. | |
960 | */ | |
961 | cond_resched(); | |
ccd979bd MF |
962 | } |
963 | ||
5693486b JB |
964 | return rc; |
965 | } | |
966 | ||
967 | int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh, | |
968 | loff_t zero_to_size) | |
969 | { | |
970 | int ret = 0; | |
971 | u64 zero_start, range_start = 0, range_end = 0; | |
972 | struct super_block *sb = inode->i_sb; | |
973 | ||
974 | zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); | |
468eedde TM |
975 | trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno, |
976 | (unsigned long long)zero_start, | |
977 | (unsigned long long)i_size_read(inode)); | |
5693486b JB |
978 | while (zero_start < zero_to_size) { |
979 | ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start, | |
980 | zero_to_size, | |
981 | &range_start, | |
982 | &range_end); | |
983 | if (ret) { | |
984 | mlog_errno(ret); | |
985 | break; | |
986 | } | |
987 | if (!range_end) | |
988 | break; | |
989 | /* Trim the ends */ | |
990 | if (range_start < zero_start) | |
991 | range_start = zero_start; | |
992 | if (range_end > zero_to_size) | |
993 | range_end = zero_to_size; | |
994 | ||
995 | ret = ocfs2_zero_extend_range(inode, range_start, | |
c7d2cbc3 | 996 | range_end, di_bh); |
5693486b JB |
997 | if (ret) { |
998 | mlog_errno(ret); | |
999 | break; | |
1000 | } | |
1001 | zero_start = range_end; | |
1002 | } | |
1003 | ||
ccd979bd MF |
1004 | return ret; |
1005 | } | |
1006 | ||
5693486b JB |
1007 | int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh, |
1008 | u64 new_i_size, u64 zero_to) | |
65ed39d6 MF |
1009 | { |
1010 | int ret; | |
1011 | u32 clusters_to_add; | |
1012 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1013 | ||
5693486b JB |
1014 | /* |
1015 | * Only quota files call this without a bh, and they can't be | |
1016 | * refcounted. | |
1017 | */ | |
84e40080 | 1018 | BUG_ON(!di_bh && ocfs2_is_refcount_inode(inode)); |
5693486b JB |
1019 | BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE)); |
1020 | ||
65ed39d6 MF |
1021 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); |
1022 | if (clusters_to_add < oi->ip_clusters) | |
1023 | clusters_to_add = 0; | |
1024 | else | |
1025 | clusters_to_add -= oi->ip_clusters; | |
1026 | ||
1027 | if (clusters_to_add) { | |
5bc55d65 JG |
1028 | ret = ocfs2_extend_allocation(inode, oi->ip_clusters, |
1029 | clusters_to_add, 0); | |
65ed39d6 MF |
1030 | if (ret) { |
1031 | mlog_errno(ret); | |
1032 | goto out; | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Call this even if we don't add any clusters to the tree. We | |
1038 | * still need to zero the area between the old i_size and the | |
1039 | * new i_size. | |
1040 | */ | |
5693486b | 1041 | ret = ocfs2_zero_extend(inode, di_bh, zero_to); |
65ed39d6 MF |
1042 | if (ret < 0) |
1043 | mlog_errno(ret); | |
1044 | ||
1045 | out: | |
1046 | return ret; | |
1047 | } | |
1048 | ||
ccd979bd MF |
1049 | static int ocfs2_extend_file(struct inode *inode, |
1050 | struct buffer_head *di_bh, | |
65ed39d6 | 1051 | u64 new_i_size) |
ccd979bd | 1052 | { |
c934a92d | 1053 | int ret = 0; |
1afc32b9 | 1054 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
ccd979bd | 1055 | |
65ed39d6 | 1056 | BUG_ON(!di_bh); |
53013cba | 1057 | |
ccd979bd MF |
1058 | /* setattr sometimes calls us like this. */ |
1059 | if (new_i_size == 0) | |
1060 | goto out; | |
1061 | ||
1062 | if (i_size_read(inode) == new_i_size) | |
5693486b | 1063 | goto out; |
ccd979bd MF |
1064 | BUG_ON(new_i_size < i_size_read(inode)); |
1065 | ||
0effef77 | 1066 | /* |
65ed39d6 MF |
1067 | * The alloc sem blocks people in read/write from reading our |
1068 | * allocation until we're done changing it. We depend on | |
1069 | * i_mutex to block other extend/truncate calls while we're | |
5693486b JB |
1070 | * here. We even have to hold it for sparse files because there |
1071 | * might be some tail zeroing. | |
0effef77 | 1072 | */ |
1afc32b9 MF |
1073 | down_write(&oi->ip_alloc_sem); |
1074 | ||
1075 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1076 | /* | |
1077 | * We can optimize small extends by keeping the inodes | |
1078 | * inline data. | |
1079 | */ | |
1080 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { | |
1081 | up_write(&oi->ip_alloc_sem); | |
1082 | goto out_update_size; | |
1083 | } | |
1084 | ||
1085 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1086 | if (ret) { | |
1087 | up_write(&oi->ip_alloc_sem); | |
1afc32b9 | 1088 | mlog_errno(ret); |
c934a92d | 1089 | goto out; |
1afc32b9 MF |
1090 | } |
1091 | } | |
1092 | ||
5693486b JB |
1093 | if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
1094 | ret = ocfs2_zero_extend(inode, di_bh, new_i_size); | |
1095 | else | |
1096 | ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size, | |
1097 | new_i_size); | |
1afc32b9 MF |
1098 | |
1099 | up_write(&oi->ip_alloc_sem); | |
65ed39d6 | 1100 | |
0effef77 MF |
1101 | if (ret < 0) { |
1102 | mlog_errno(ret); | |
c934a92d | 1103 | goto out; |
53013cba MF |
1104 | } |
1105 | ||
3a0782d0 | 1106 | out_update_size: |
65ed39d6 MF |
1107 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
1108 | if (ret < 0) | |
1109 | mlog_errno(ret); | |
ccd979bd MF |
1110 | |
1111 | out: | |
1112 | return ret; | |
1113 | } | |
1114 | ||
1115 | int ocfs2_setattr(struct dentry *dentry, struct iattr *attr) | |
1116 | { | |
1117 | int status = 0, size_change; | |
3d46a44a | 1118 | int inode_locked = 0; |
2b0143b5 | 1119 | struct inode *inode = d_inode(dentry); |
ccd979bd MF |
1120 | struct super_block *sb = inode->i_sb; |
1121 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
1122 | struct buffer_head *bh = NULL; | |
1fabe148 | 1123 | handle_t *handle = NULL; |
65bac575 | 1124 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
52a9ee28 | 1125 | int qtype; |
b891fa50 ER |
1126 | int had_lock; |
1127 | struct ocfs2_lock_holder oh; | |
ccd979bd | 1128 | |
468eedde TM |
1129 | trace_ocfs2_setattr(inode, dentry, |
1130 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1131 | dentry->d_name.len, dentry->d_name.name, | |
1132 | attr->ia_valid, attr->ia_mode, | |
ba613560 EB |
1133 | from_kuid(&init_user_ns, attr->ia_uid), |
1134 | from_kgid(&init_user_ns, attr->ia_gid)); | |
ccd979bd | 1135 | |
bc535809 SM |
1136 | /* ensuring we don't even attempt to truncate a symlink */ |
1137 | if (S_ISLNK(inode->i_mode)) | |
1138 | attr->ia_valid &= ~ATTR_SIZE; | |
1139 | ||
ccd979bd MF |
1140 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
1141 | | ATTR_GID | ATTR_UID | ATTR_MODE) | |
468eedde | 1142 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) |
ccd979bd | 1143 | return 0; |
ccd979bd | 1144 | |
31051c85 | 1145 | status = setattr_prepare(dentry, attr); |
ccd979bd MF |
1146 | if (status) |
1147 | return status; | |
1148 | ||
9c89fe0a JK |
1149 | if (is_quota_modification(inode, attr)) { |
1150 | status = dquot_initialize(inode); | |
1151 | if (status) | |
1152 | return status; | |
1153 | } | |
ccd979bd MF |
1154 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
1155 | if (size_change) { | |
28f5a8a7 | 1156 | /* |
1157 | * Here we should wait dio to finish before inode lock | |
1158 | * to avoid a deadlock between ocfs2_setattr() and | |
1159 | * ocfs2_dio_end_io_write() | |
1160 | */ | |
1161 | inode_dio_wait(inode); | |
1162 | ||
ccd979bd MF |
1163 | status = ocfs2_rw_lock(inode, 1); |
1164 | if (status < 0) { | |
1165 | mlog_errno(status); | |
1166 | goto bail; | |
1167 | } | |
1168 | } | |
1169 | ||
b891fa50 ER |
1170 | had_lock = ocfs2_inode_lock_tracker(inode, &bh, 1, &oh); |
1171 | if (had_lock < 0) { | |
1172 | status = had_lock; | |
ccd979bd | 1173 | goto bail_unlock_rw; |
b891fa50 ER |
1174 | } else if (had_lock) { |
1175 | /* | |
1176 | * As far as we know, ocfs2_setattr() could only be the first | |
1177 | * VFS entry point in the call chain of recursive cluster | |
1178 | * locking issue. | |
1179 | * | |
1180 | * For instance: | |
1181 | * chmod_common() | |
1182 | * notify_change() | |
1183 | * ocfs2_setattr() | |
1184 | * posix_acl_chmod() | |
1185 | * ocfs2_iop_get_acl() | |
1186 | * | |
1187 | * But, we're not 100% sure if it's always true, because the | |
1188 | * ordering of the VFS entry points in the call chain is out | |
1189 | * of our control. So, we'd better dump the stack here to | |
1190 | * catch the other cases of recursive locking. | |
1191 | */ | |
1192 | mlog(ML_ERROR, "Another case of recursive locking:\n"); | |
1193 | dump_stack(); | |
ccd979bd | 1194 | } |
3d46a44a | 1195 | inode_locked = 1; |
ccd979bd | 1196 | |
d62e74be | 1197 | if (size_change) { |
5051f768 WW |
1198 | status = inode_newsize_ok(inode, attr->ia_size); |
1199 | if (status) | |
ce76fd30 | 1200 | goto bail_unlock; |
ce76fd30 | 1201 | |
d62e74be | 1202 | if (i_size_read(inode) >= attr->ia_size) { |
2b4e30fb JB |
1203 | if (ocfs2_should_order_data(inode)) { |
1204 | status = ocfs2_begin_ordered_truncate(inode, | |
1205 | attr->ia_size); | |
1206 | if (status) | |
1207 | goto bail_unlock; | |
1208 | } | |
ccd979bd | 1209 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
2b4e30fb | 1210 | } else |
65ed39d6 | 1211 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
ccd979bd MF |
1212 | if (status < 0) { |
1213 | if (status != -ENOSPC) | |
1214 | mlog_errno(status); | |
1215 | status = -ENOSPC; | |
1216 | goto bail_unlock; | |
1217 | } | |
1218 | } | |
1219 | ||
488c8ef0 EB |
1220 | if ((attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) || |
1221 | (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) { | |
65bac575 JK |
1222 | /* |
1223 | * Gather pointers to quota structures so that allocation / | |
1224 | * freeing of quota structures happens here and not inside | |
b43fa828 | 1225 | * dquot_transfer() where we have problems with lock ordering |
65bac575 | 1226 | */ |
488c8ef0 | 1227 | if (attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid) |
a90714c1 JK |
1228 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
1229 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { | |
aca645a6 | 1230 | transfer_to[USRQUOTA] = dqget(sb, make_kqid_uid(attr->ia_uid)); |
6184fc0b JK |
1231 | if (IS_ERR(transfer_to[USRQUOTA])) { |
1232 | status = PTR_ERR(transfer_to[USRQUOTA]); | |
ce750f43 | 1233 | transfer_to[USRQUOTA] = NULL; |
a90714c1 | 1234 | goto bail_unlock; |
65bac575 | 1235 | } |
a90714c1 | 1236 | } |
488c8ef0 | 1237 | if (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid) |
a90714c1 JK |
1238 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
1239 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { | |
aca645a6 | 1240 | transfer_to[GRPQUOTA] = dqget(sb, make_kqid_gid(attr->ia_gid)); |
6184fc0b JK |
1241 | if (IS_ERR(transfer_to[GRPQUOTA])) { |
1242 | status = PTR_ERR(transfer_to[GRPQUOTA]); | |
ce750f43 | 1243 | transfer_to[GRPQUOTA] = NULL; |
a90714c1 | 1244 | goto bail_unlock; |
65bac575 | 1245 | } |
a90714c1 | 1246 | } |
65bac575 JK |
1247 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
1248 | 2 * ocfs2_quota_trans_credits(sb)); | |
a90714c1 JK |
1249 | if (IS_ERR(handle)) { |
1250 | status = PTR_ERR(handle); | |
1251 | mlog_errno(status); | |
1252 | goto bail_unlock; | |
1253 | } | |
52a9ee28 | 1254 | status = __dquot_transfer(inode, transfer_to); |
a90714c1 JK |
1255 | if (status < 0) |
1256 | goto bail_commit; | |
1257 | } else { | |
1258 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1259 | if (IS_ERR(handle)) { | |
1260 | status = PTR_ERR(handle); | |
1261 | mlog_errno(status); | |
1262 | goto bail_unlock; | |
1263 | } | |
ccd979bd MF |
1264 | } |
1265 | ||
1025774c CH |
1266 | setattr_copy(inode, attr); |
1267 | mark_inode_dirty(inode); | |
1268 | ||
ccd979bd MF |
1269 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
1270 | if (status < 0) | |
1271 | mlog_errno(status); | |
1272 | ||
1273 | bail_commit: | |
02dc1af4 | 1274 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1275 | bail_unlock: |
b891fa50 ER |
1276 | if (status && inode_locked) { |
1277 | ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock); | |
3d46a44a TS |
1278 | inode_locked = 0; |
1279 | } | |
ccd979bd MF |
1280 | bail_unlock_rw: |
1281 | if (size_change) | |
1282 | ocfs2_rw_unlock(inode, 1); | |
1283 | bail: | |
ccd979bd | 1284 | |
65bac575 | 1285 | /* Release quota pointers in case we acquired them */ |
52362810 | 1286 | for (qtype = 0; qtype < OCFS2_MAXQUOTAS; qtype++) |
65bac575 | 1287 | dqput(transfer_to[qtype]); |
65bac575 | 1288 | |
060bc66d | 1289 | if (!status && attr->ia_valid & ATTR_MODE) { |
5ee0fbd5 | 1290 | status = ocfs2_acl_chmod(inode, bh); |
060bc66d TY |
1291 | if (status < 0) |
1292 | mlog_errno(status); | |
1293 | } | |
3d46a44a | 1294 | if (inode_locked) |
b891fa50 | 1295 | ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock); |
060bc66d | 1296 | |
5ee0fbd5 | 1297 | brelse(bh); |
ccd979bd MF |
1298 | return status; |
1299 | } | |
1300 | ||
a528d35e DH |
1301 | int ocfs2_getattr(const struct path *path, struct kstat *stat, |
1302 | u32 request_mask, unsigned int flags) | |
ccd979bd | 1303 | { |
a528d35e DH |
1304 | struct inode *inode = d_inode(path->dentry); |
1305 | struct super_block *sb = path->dentry->d_sb; | |
ccd979bd MF |
1306 | struct ocfs2_super *osb = sb->s_fs_info; |
1307 | int err; | |
1308 | ||
a528d35e | 1309 | err = ocfs2_inode_revalidate(path->dentry); |
ccd979bd MF |
1310 | if (err) { |
1311 | if (err != -ENOENT) | |
1312 | mlog_errno(err); | |
1313 | goto bail; | |
1314 | } | |
1315 | ||
1316 | generic_fillattr(inode, stat); | |
d6364627 JH |
1317 | /* |
1318 | * If there is inline data in the inode, the inode will normally not | |
1319 | * have data blocks allocated (it may have an external xattr block). | |
1320 | * Report at least one sector for such files, so tools like tar, rsync, | |
1321 | * others don't incorrectly think the file is completely sparse. | |
1322 | */ | |
1323 | if (unlikely(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)) | |
1324 | stat->blocks += (stat->size + 511)>>9; | |
ccd979bd MF |
1325 | |
1326 | /* We set the blksize from the cluster size for performance */ | |
1327 | stat->blksize = osb->s_clustersize; | |
1328 | ||
1329 | bail: | |
ccd979bd MF |
1330 | return err; |
1331 | } | |
1332 | ||
10556cb2 | 1333 | int ocfs2_permission(struct inode *inode, int mask) |
d38eb8db | 1334 | { |
b891fa50 ER |
1335 | int ret, had_lock; |
1336 | struct ocfs2_lock_holder oh; | |
d38eb8db | 1337 | |
10556cb2 | 1338 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
1339 | return -ECHILD; |
1340 | ||
b891fa50 ER |
1341 | had_lock = ocfs2_inode_lock_tracker(inode, NULL, 0, &oh); |
1342 | if (had_lock < 0) { | |
1343 | ret = had_lock; | |
d38eb8db | 1344 | goto out; |
b891fa50 ER |
1345 | } else if (had_lock) { |
1346 | /* See comments in ocfs2_setattr() for details. | |
1347 | * The call chain of this case could be: | |
1348 | * do_sys_open() | |
1349 | * may_open() | |
1350 | * inode_permission() | |
1351 | * ocfs2_permission() | |
1352 | * ocfs2_iop_get_acl() | |
1353 | */ | |
1354 | mlog(ML_ERROR, "Another case of recursive locking:\n"); | |
1355 | dump_stack(); | |
d38eb8db TY |
1356 | } |
1357 | ||
2830ba7f | 1358 | ret = generic_permission(inode, mask); |
d38eb8db | 1359 | |
b891fa50 | 1360 | ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock); |
d38eb8db | 1361 | out: |
d38eb8db TY |
1362 | return ret; |
1363 | } | |
1364 | ||
b2580103 MF |
1365 | static int __ocfs2_write_remove_suid(struct inode *inode, |
1366 | struct buffer_head *bh) | |
ccd979bd MF |
1367 | { |
1368 | int ret; | |
1fabe148 | 1369 | handle_t *handle; |
ccd979bd MF |
1370 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1371 | struct ocfs2_dinode *di; | |
1372 | ||
468eedde TM |
1373 | trace_ocfs2_write_remove_suid( |
1374 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1375 | inode->i_mode); | |
ccd979bd | 1376 | |
65eff9cc | 1377 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
1378 | if (IS_ERR(handle)) { |
1379 | ret = PTR_ERR(handle); | |
ccd979bd MF |
1380 | mlog_errno(ret); |
1381 | goto out; | |
1382 | } | |
1383 | ||
0cf2f763 | 1384 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 1385 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1386 | if (ret < 0) { |
1387 | mlog_errno(ret); | |
b2580103 | 1388 | goto out_trans; |
ccd979bd MF |
1389 | } |
1390 | ||
1391 | inode->i_mode &= ~S_ISUID; | |
1392 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) | |
1393 | inode->i_mode &= ~S_ISGID; | |
1394 | ||
1395 | di = (struct ocfs2_dinode *) bh->b_data; | |
1396 | di->i_mode = cpu_to_le16(inode->i_mode); | |
6fdb702d | 1397 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
ccd979bd | 1398 | |
ec20cec7 | 1399 | ocfs2_journal_dirty(handle, bh); |
b2580103 | 1400 | |
ccd979bd | 1401 | out_trans: |
02dc1af4 | 1402 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1403 | out: |
ccd979bd MF |
1404 | return ret; |
1405 | } | |
1406 | ||
b2580103 MF |
1407 | static int ocfs2_write_remove_suid(struct inode *inode) |
1408 | { | |
1409 | int ret; | |
1410 | struct buffer_head *bh = NULL; | |
b2580103 | 1411 | |
b657c95c | 1412 | ret = ocfs2_read_inode_block(inode, &bh); |
b2580103 MF |
1413 | if (ret < 0) { |
1414 | mlog_errno(ret); | |
1415 | goto out; | |
1416 | } | |
1417 | ||
1418 | ret = __ocfs2_write_remove_suid(inode, bh); | |
1419 | out: | |
1420 | brelse(bh); | |
1421 | return ret; | |
1422 | } | |
1423 | ||
2ae99a60 MF |
1424 | /* |
1425 | * Allocate enough extents to cover the region starting at byte offset | |
1426 | * start for len bytes. Existing extents are skipped, any extents | |
1427 | * added are marked as "unwritten". | |
1428 | */ | |
1429 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, | |
1430 | u64 start, u64 len) | |
1431 | { | |
1432 | int ret; | |
1433 | u32 cpos, phys_cpos, clusters, alloc_size; | |
1afc32b9 MF |
1434 | u64 end = start + len; |
1435 | struct buffer_head *di_bh = NULL; | |
1436 | ||
1437 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
b657c95c | 1438 | ret = ocfs2_read_inode_block(inode, &di_bh); |
1afc32b9 MF |
1439 | if (ret) { |
1440 | mlog_errno(ret); | |
1441 | goto out; | |
1442 | } | |
1443 | ||
1444 | /* | |
1445 | * Nothing to do if the requested reservation range | |
1446 | * fits within the inode. | |
1447 | */ | |
1448 | if (ocfs2_size_fits_inline_data(di_bh, end)) | |
1449 | goto out; | |
1450 | ||
1451 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1452 | if (ret) { | |
1453 | mlog_errno(ret); | |
1454 | goto out; | |
1455 | } | |
1456 | } | |
2ae99a60 MF |
1457 | |
1458 | /* | |
1459 | * We consider both start and len to be inclusive. | |
1460 | */ | |
1461 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1462 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); | |
1463 | clusters -= cpos; | |
1464 | ||
1465 | while (clusters) { | |
1466 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1467 | &alloc_size, NULL); | |
1468 | if (ret) { | |
1469 | mlog_errno(ret); | |
1470 | goto out; | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * Hole or existing extent len can be arbitrary, so | |
1475 | * cap it to our own allocation request. | |
1476 | */ | |
1477 | if (alloc_size > clusters) | |
1478 | alloc_size = clusters; | |
1479 | ||
1480 | if (phys_cpos) { | |
1481 | /* | |
1482 | * We already have an allocation at this | |
1483 | * region so we can safely skip it. | |
1484 | */ | |
1485 | goto next; | |
1486 | } | |
1487 | ||
5bc55d65 | 1488 | ret = ocfs2_extend_allocation(inode, cpos, alloc_size, 1); |
2ae99a60 MF |
1489 | if (ret) { |
1490 | if (ret != -ENOSPC) | |
1491 | mlog_errno(ret); | |
1492 | goto out; | |
1493 | } | |
1494 | ||
1495 | next: | |
1496 | cpos += alloc_size; | |
1497 | clusters -= alloc_size; | |
1498 | } | |
1499 | ||
1500 | ret = 0; | |
1501 | out: | |
1afc32b9 MF |
1502 | |
1503 | brelse(di_bh); | |
2ae99a60 MF |
1504 | return ret; |
1505 | } | |
1506 | ||
063c4561 MF |
1507 | /* |
1508 | * Truncate a byte range, avoiding pages within partial clusters. This | |
1509 | * preserves those pages for the zeroing code to write to. | |
1510 | */ | |
1511 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, | |
1512 | u64 byte_len) | |
1513 | { | |
1514 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1515 | loff_t start, end; | |
1516 | struct address_space *mapping = inode->i_mapping; | |
1517 | ||
1518 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); | |
1519 | end = byte_start + byte_len; | |
1520 | end = end & ~(osb->s_clustersize - 1); | |
1521 | ||
1522 | if (start < end) { | |
1523 | unmap_mapping_range(mapping, start, end - start, 0); | |
1524 | truncate_inode_pages_range(mapping, start, end - 1); | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | static int ocfs2_zero_partial_clusters(struct inode *inode, | |
1529 | u64 start, u64 len) | |
1530 | { | |
1531 | int ret = 0; | |
d21c353d AS |
1532 | u64 tmpend = 0; |
1533 | u64 end = start + len; | |
063c4561 MF |
1534 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1535 | unsigned int csize = osb->s_clustersize; | |
1536 | handle_t *handle; | |
1537 | ||
1538 | /* | |
1539 | * The "start" and "end" values are NOT necessarily part of | |
1540 | * the range whose allocation is being deleted. Rather, this | |
1541 | * is what the user passed in with the request. We must zero | |
1542 | * partial clusters here. There's no need to worry about | |
1543 | * physical allocation - the zeroing code knows to skip holes. | |
1544 | */ | |
468eedde TM |
1545 | trace_ocfs2_zero_partial_clusters( |
1546 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1547 | (unsigned long long)start, (unsigned long long)end); | |
063c4561 MF |
1548 | |
1549 | /* | |
1550 | * If both edges are on a cluster boundary then there's no | |
1551 | * zeroing required as the region is part of the allocation to | |
1552 | * be truncated. | |
1553 | */ | |
1554 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) | |
1555 | goto out; | |
1556 | ||
1557 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
1558 | if (IS_ERR(handle)) { |
1559 | ret = PTR_ERR(handle); | |
063c4561 MF |
1560 | mlog_errno(ret); |
1561 | goto out; | |
1562 | } | |
1563 | ||
1564 | /* | |
d21c353d AS |
1565 | * If start is on a cluster boundary and end is somewhere in another |
1566 | * cluster, we have not COWed the cluster starting at start, unless | |
1567 | * end is also within the same cluster. So, in this case, we skip this | |
1568 | * first call to ocfs2_zero_range_for_truncate() truncate and move on | |
1569 | * to the next one. | |
063c4561 | 1570 | */ |
d21c353d AS |
1571 | if ((start & (csize - 1)) != 0) { |
1572 | /* | |
1573 | * We want to get the byte offset of the end of the 1st | |
1574 | * cluster. | |
1575 | */ | |
1576 | tmpend = (u64)osb->s_clustersize + | |
1577 | (start & ~(osb->s_clustersize - 1)); | |
1578 | if (tmpend > end) | |
1579 | tmpend = end; | |
063c4561 | 1580 | |
d21c353d AS |
1581 | trace_ocfs2_zero_partial_clusters_range1( |
1582 | (unsigned long long)start, | |
1583 | (unsigned long long)tmpend); | |
063c4561 | 1584 | |
d21c353d AS |
1585 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, |
1586 | tmpend); | |
1587 | if (ret) | |
1588 | mlog_errno(ret); | |
1589 | } | |
063c4561 MF |
1590 | |
1591 | if (tmpend < end) { | |
1592 | /* | |
1593 | * This may make start and end equal, but the zeroing | |
1594 | * code will skip any work in that case so there's no | |
1595 | * need to catch it up here. | |
1596 | */ | |
1597 | start = end & ~(osb->s_clustersize - 1); | |
1598 | ||
468eedde TM |
1599 | trace_ocfs2_zero_partial_clusters_range2( |
1600 | (unsigned long long)start, (unsigned long long)end); | |
063c4561 MF |
1601 | |
1602 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); | |
1603 | if (ret) | |
1604 | mlog_errno(ret); | |
1605 | } | |
6fdb702d | 1606 | ocfs2_update_inode_fsync_trans(handle, inode, 1); |
063c4561 MF |
1607 | |
1608 | ocfs2_commit_trans(osb, handle); | |
1609 | out: | |
1610 | return ret; | |
1611 | } | |
1612 | ||
c1631d4a TY |
1613 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
1614 | { | |
1615 | int i; | |
1616 | struct ocfs2_extent_rec *rec = NULL; | |
1617 | ||
1618 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
1619 | ||
1620 | rec = &el->l_recs[i]; | |
1621 | ||
1622 | if (le32_to_cpu(rec->e_cpos) < pos) | |
1623 | break; | |
1624 | } | |
1625 | ||
1626 | return i; | |
1627 | } | |
1628 | ||
1629 | /* | |
1630 | * Helper to calculate the punching pos and length in one run, we handle the | |
1631 | * following three cases in order: | |
1632 | * | |
1633 | * - remove the entire record | |
1634 | * - remove a partial record | |
1635 | * - no record needs to be removed (hole-punching completed) | |
1636 | */ | |
1637 | static void ocfs2_calc_trunc_pos(struct inode *inode, | |
1638 | struct ocfs2_extent_list *el, | |
1639 | struct ocfs2_extent_rec *rec, | |
1640 | u32 trunc_start, u32 *trunc_cpos, | |
1641 | u32 *trunc_len, u32 *trunc_end, | |
1642 | u64 *blkno, int *done) | |
1643 | { | |
1644 | int ret = 0; | |
1645 | u32 coff, range; | |
1646 | ||
1647 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); | |
1648 | ||
1649 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { | |
9a790ba1 TY |
1650 | /* |
1651 | * remove an entire extent record. | |
1652 | */ | |
c1631d4a TY |
1653 | *trunc_cpos = le32_to_cpu(rec->e_cpos); |
1654 | /* | |
1655 | * Skip holes if any. | |
1656 | */ | |
1657 | if (range < *trunc_end) | |
1658 | *trunc_end = range; | |
1659 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); | |
1660 | *blkno = le64_to_cpu(rec->e_blkno); | |
1661 | *trunc_end = le32_to_cpu(rec->e_cpos); | |
1662 | } else if (range > trunc_start) { | |
9a790ba1 TY |
1663 | /* |
1664 | * remove a partial extent record, which means we're | |
1665 | * removing the last extent record. | |
1666 | */ | |
c1631d4a | 1667 | *trunc_cpos = trunc_start; |
9a790ba1 TY |
1668 | /* |
1669 | * skip hole if any. | |
1670 | */ | |
1671 | if (range < *trunc_end) | |
1672 | *trunc_end = range; | |
c1631d4a TY |
1673 | *trunc_len = *trunc_end - trunc_start; |
1674 | coff = trunc_start - le32_to_cpu(rec->e_cpos); | |
1675 | *blkno = le64_to_cpu(rec->e_blkno) + | |
1676 | ocfs2_clusters_to_blocks(inode->i_sb, coff); | |
1677 | *trunc_end = trunc_start; | |
1678 | } else { | |
1679 | /* | |
1680 | * It may have two following possibilities: | |
1681 | * | |
1682 | * - last record has been removed | |
1683 | * - trunc_start was within a hole | |
1684 | * | |
1685 | * both two cases mean the completion of hole punching. | |
1686 | */ | |
1687 | ret = 1; | |
1688 | } | |
1689 | ||
1690 | *done = ret; | |
1691 | } | |
1692 | ||
29ac8e85 DW |
1693 | int ocfs2_remove_inode_range(struct inode *inode, |
1694 | struct buffer_head *di_bh, u64 byte_start, | |
1695 | u64 byte_len) | |
063c4561 | 1696 | { |
c1631d4a TY |
1697 | int ret = 0, flags = 0, done = 0, i; |
1698 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; | |
1699 | u32 cluster_in_el; | |
063c4561 MF |
1700 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1701 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
b1967d0e | 1702 | struct address_space *mapping = inode->i_mapping; |
fecc0112 | 1703 | struct ocfs2_extent_tree et; |
c1631d4a TY |
1704 | struct ocfs2_path *path = NULL; |
1705 | struct ocfs2_extent_list *el = NULL; | |
1706 | struct ocfs2_extent_rec *rec = NULL; | |
e8aec068 | 1707 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
c1631d4a | 1708 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
063c4561 | 1709 | |
5e404e9e | 1710 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
063c4561 MF |
1711 | ocfs2_init_dealloc_ctxt(&dealloc); |
1712 | ||
468eedde TM |
1713 | trace_ocfs2_remove_inode_range( |
1714 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1715 | (unsigned long long)byte_start, | |
1716 | (unsigned long long)byte_len); | |
1717 | ||
063c4561 MF |
1718 | if (byte_len == 0) |
1719 | return 0; | |
1720 | ||
1afc32b9 MF |
1721 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
1722 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, | |
b1967d0e MF |
1723 | byte_start + byte_len, 0); |
1724 | if (ret) { | |
1afc32b9 | 1725 | mlog_errno(ret); |
b1967d0e MF |
1726 | goto out; |
1727 | } | |
1728 | /* | |
1729 | * There's no need to get fancy with the page cache | |
1730 | * truncate of an inline-data inode. We're talking | |
1731 | * about less than a page here, which will be cached | |
1732 | * in the dinode buffer anyway. | |
1733 | */ | |
1734 | unmap_mapping_range(mapping, 0, 0, 0); | |
1735 | truncate_inode_pages(mapping, 0); | |
1736 | goto out; | |
1afc32b9 MF |
1737 | } |
1738 | ||
e8aec068 TY |
1739 | /* |
1740 | * For reflinks, we may need to CoW 2 clusters which might be | |
1741 | * partially zero'd later, if hole's start and end offset were | |
1742 | * within one cluster(means is not exactly aligned to clustersize). | |
1743 | */ | |
1744 | ||
84e40080 | 1745 | if (ocfs2_is_refcount_inode(inode)) { |
e8aec068 TY |
1746 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start); |
1747 | if (ret) { | |
1748 | mlog_errno(ret); | |
1749 | goto out; | |
1750 | } | |
1751 | ||
1752 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len); | |
1753 | if (ret) { | |
1754 | mlog_errno(ret); | |
1755 | goto out; | |
1756 | } | |
1757 | } | |
1758 | ||
063c4561 | 1759 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
c1631d4a TY |
1760 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
1761 | cluster_in_el = trunc_end; | |
063c4561 | 1762 | |
063c4561 MF |
1763 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); |
1764 | if (ret) { | |
1765 | mlog_errno(ret); | |
1766 | goto out; | |
1767 | } | |
1768 | ||
c1631d4a TY |
1769 | path = ocfs2_new_path_from_et(&et); |
1770 | if (!path) { | |
1771 | ret = -ENOMEM; | |
1772 | mlog_errno(ret); | |
1773 | goto out; | |
1774 | } | |
1775 | ||
1776 | while (trunc_end > trunc_start) { | |
1777 | ||
1778 | ret = ocfs2_find_path(INODE_CACHE(inode), path, | |
1779 | cluster_in_el); | |
063c4561 MF |
1780 | if (ret) { |
1781 | mlog_errno(ret); | |
1782 | goto out; | |
1783 | } | |
1784 | ||
c1631d4a | 1785 | el = path_leaf_el(path); |
063c4561 | 1786 | |
c1631d4a TY |
1787 | i = ocfs2_find_rec(el, trunc_end); |
1788 | /* | |
1789 | * Need to go to previous extent block. | |
1790 | */ | |
1791 | if (i < 0) { | |
1792 | if (path->p_tree_depth == 0) | |
1793 | break; | |
063c4561 | 1794 | |
c1631d4a TY |
1795 | ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, |
1796 | path, | |
1797 | &cluster_in_el); | |
063c4561 MF |
1798 | if (ret) { |
1799 | mlog_errno(ret); | |
1800 | goto out; | |
1801 | } | |
c1631d4a TY |
1802 | |
1803 | /* | |
1804 | * We've reached the leftmost extent block, | |
1805 | * it's safe to leave. | |
1806 | */ | |
1807 | if (cluster_in_el == 0) | |
1808 | break; | |
1809 | ||
1810 | /* | |
1811 | * The 'pos' searched for previous extent block is | |
1812 | * always one cluster less than actual trunc_end. | |
1813 | */ | |
1814 | trunc_end = cluster_in_el + 1; | |
1815 | ||
1816 | ocfs2_reinit_path(path, 1); | |
1817 | ||
1818 | continue; | |
1819 | ||
1820 | } else | |
1821 | rec = &el->l_recs[i]; | |
1822 | ||
1823 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos, | |
1824 | &trunc_len, &trunc_end, &blkno, &done); | |
1825 | if (done) | |
1826 | break; | |
1827 | ||
1828 | flags = rec->e_flags; | |
1829 | phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno); | |
1830 | ||
1831 | ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos, | |
1832 | phys_cpos, trunc_len, flags, | |
f62f12b3 | 1833 | &dealloc, refcount_loc, false); |
c1631d4a TY |
1834 | if (ret < 0) { |
1835 | mlog_errno(ret); | |
1836 | goto out; | |
063c4561 MF |
1837 | } |
1838 | ||
c1631d4a TY |
1839 | cluster_in_el = trunc_end; |
1840 | ||
1841 | ocfs2_reinit_path(path, 1); | |
063c4561 MF |
1842 | } |
1843 | ||
1844 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); | |
1845 | ||
1846 | out: | |
7aebff18 | 1847 | ocfs2_free_path(path); |
063c4561 MF |
1848 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1849 | ocfs2_run_deallocs(osb, &dealloc); | |
1850 | ||
1851 | return ret; | |
1852 | } | |
1853 | ||
b2580103 MF |
1854 | /* |
1855 | * Parts of this function taken from xfs_change_file_space() | |
1856 | */ | |
385820a3 MF |
1857 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
1858 | loff_t f_pos, unsigned int cmd, | |
1859 | struct ocfs2_space_resv *sr, | |
1860 | int change_size) | |
b2580103 MF |
1861 | { |
1862 | int ret; | |
1863 | s64 llen; | |
385820a3 | 1864 | loff_t size; |
b2580103 MF |
1865 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1866 | struct buffer_head *di_bh = NULL; | |
1867 | handle_t *handle; | |
a00cce35 | 1868 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
b2580103 | 1869 | |
b2580103 MF |
1870 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
1871 | return -EROFS; | |
1872 | ||
5955102c | 1873 | inode_lock(inode); |
b2580103 MF |
1874 | |
1875 | /* | |
1876 | * This prevents concurrent writes on other nodes | |
1877 | */ | |
1878 | ret = ocfs2_rw_lock(inode, 1); | |
1879 | if (ret) { | |
1880 | mlog_errno(ret); | |
1881 | goto out; | |
1882 | } | |
1883 | ||
e63aecb6 | 1884 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
b2580103 MF |
1885 | if (ret) { |
1886 | mlog_errno(ret); | |
1887 | goto out_rw_unlock; | |
1888 | } | |
1889 | ||
1890 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { | |
1891 | ret = -EPERM; | |
e63aecb6 | 1892 | goto out_inode_unlock; |
b2580103 MF |
1893 | } |
1894 | ||
1895 | switch (sr->l_whence) { | |
1896 | case 0: /*SEEK_SET*/ | |
1897 | break; | |
1898 | case 1: /*SEEK_CUR*/ | |
385820a3 | 1899 | sr->l_start += f_pos; |
b2580103 MF |
1900 | break; |
1901 | case 2: /*SEEK_END*/ | |
1902 | sr->l_start += i_size_read(inode); | |
1903 | break; | |
1904 | default: | |
1905 | ret = -EINVAL; | |
e63aecb6 | 1906 | goto out_inode_unlock; |
b2580103 MF |
1907 | } |
1908 | sr->l_whence = 0; | |
1909 | ||
1910 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; | |
1911 | ||
1912 | if (sr->l_start < 0 | |
1913 | || sr->l_start > max_off | |
1914 | || (sr->l_start + llen) < 0 | |
1915 | || (sr->l_start + llen) > max_off) { | |
1916 | ret = -EINVAL; | |
e63aecb6 | 1917 | goto out_inode_unlock; |
b2580103 | 1918 | } |
385820a3 | 1919 | size = sr->l_start + sr->l_len; |
b2580103 | 1920 | |
a2a3b398 TS |
1921 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64 || |
1922 | cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) { | |
b2580103 MF |
1923 | if (sr->l_len <= 0) { |
1924 | ret = -EINVAL; | |
e63aecb6 | 1925 | goto out_inode_unlock; |
b2580103 MF |
1926 | } |
1927 | } | |
1928 | ||
385820a3 | 1929 | if (file && should_remove_suid(file->f_path.dentry)) { |
b2580103 MF |
1930 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
1931 | if (ret) { | |
1932 | mlog_errno(ret); | |
e63aecb6 | 1933 | goto out_inode_unlock; |
b2580103 MF |
1934 | } |
1935 | } | |
1936 | ||
1937 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1938 | switch (cmd) { | |
1939 | case OCFS2_IOC_RESVSP: | |
1940 | case OCFS2_IOC_RESVSP64: | |
1941 | /* | |
1942 | * This takes unsigned offsets, but the signed ones we | |
1943 | * pass have been checked against overflow above. | |
1944 | */ | |
1945 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, | |
1946 | sr->l_len); | |
1947 | break; | |
1948 | case OCFS2_IOC_UNRESVSP: | |
1949 | case OCFS2_IOC_UNRESVSP64: | |
1950 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, | |
1951 | sr->l_len); | |
1952 | break; | |
1953 | default: | |
1954 | ret = -EINVAL; | |
1955 | } | |
1956 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1957 | if (ret) { | |
1958 | mlog_errno(ret); | |
e63aecb6 | 1959 | goto out_inode_unlock; |
b2580103 MF |
1960 | } |
1961 | ||
1962 | /* | |
1963 | * We update c/mtime for these changes | |
1964 | */ | |
1965 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
1966 | if (IS_ERR(handle)) { | |
1967 | ret = PTR_ERR(handle); | |
1968 | mlog_errno(ret); | |
e63aecb6 | 1969 | goto out_inode_unlock; |
b2580103 MF |
1970 | } |
1971 | ||
385820a3 MF |
1972 | if (change_size && i_size_read(inode) < size) |
1973 | i_size_write(inode, size); | |
1974 | ||
078cd827 | 1975 | inode->i_ctime = inode->i_mtime = current_time(inode); |
b2580103 MF |
1976 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); |
1977 | if (ret < 0) | |
1978 | mlog_errno(ret); | |
1979 | ||
a4e08d00 | 1980 | if (file && (file->f_flags & O_SYNC)) |
df295d4a MF |
1981 | handle->h_sync = 1; |
1982 | ||
b2580103 MF |
1983 | ocfs2_commit_trans(osb, handle); |
1984 | ||
e63aecb6 | 1985 | out_inode_unlock: |
b2580103 | 1986 | brelse(di_bh); |
e63aecb6 | 1987 | ocfs2_inode_unlock(inode, 1); |
b2580103 MF |
1988 | out_rw_unlock: |
1989 | ocfs2_rw_unlock(inode, 1); | |
1990 | ||
b2580103 | 1991 | out: |
5955102c | 1992 | inode_unlock(inode); |
b2580103 MF |
1993 | return ret; |
1994 | } | |
1995 | ||
385820a3 MF |
1996 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
1997 | struct ocfs2_space_resv *sr) | |
1998 | { | |
496ad9aa | 1999 | struct inode *inode = file_inode(file); |
c19a28e1 | 2000 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
fef6925c | 2001 | int ret; |
385820a3 MF |
2002 | |
2003 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && | |
2004 | !ocfs2_writes_unwritten_extents(osb)) | |
2005 | return -ENOTTY; | |
2006 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && | |
2007 | !ocfs2_sparse_alloc(osb)) | |
2008 | return -ENOTTY; | |
2009 | ||
2010 | if (!S_ISREG(inode->i_mode)) | |
2011 | return -EINVAL; | |
2012 | ||
2013 | if (!(file->f_mode & FMODE_WRITE)) | |
2014 | return -EBADF; | |
2015 | ||
fef6925c JK |
2016 | ret = mnt_want_write_file(file); |
2017 | if (ret) | |
2018 | return ret; | |
2019 | ret = __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); | |
2020 | mnt_drop_write_file(file); | |
2021 | return ret; | |
385820a3 MF |
2022 | } |
2023 | ||
2fe17c10 | 2024 | static long ocfs2_fallocate(struct file *file, int mode, loff_t offset, |
385820a3 MF |
2025 | loff_t len) |
2026 | { | |
496ad9aa | 2027 | struct inode *inode = file_inode(file); |
385820a3 MF |
2028 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2029 | struct ocfs2_space_resv sr; | |
2030 | int change_size = 1; | |
db47fef2 | 2031 | int cmd = OCFS2_IOC_RESVSP64; |
385820a3 | 2032 | |
64c23e86 CH |
2033 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
2034 | return -EOPNOTSUPP; | |
385820a3 MF |
2035 | if (!ocfs2_writes_unwritten_extents(osb)) |
2036 | return -EOPNOTSUPP; | |
2037 | ||
385820a3 MF |
2038 | if (mode & FALLOC_FL_KEEP_SIZE) |
2039 | change_size = 0; | |
2040 | ||
db47fef2 JB |
2041 | if (mode & FALLOC_FL_PUNCH_HOLE) |
2042 | cmd = OCFS2_IOC_UNRESVSP64; | |
2043 | ||
385820a3 MF |
2044 | sr.l_whence = 0; |
2045 | sr.l_start = (s64)offset; | |
2046 | sr.l_len = (s64)len; | |
2047 | ||
db47fef2 JB |
2048 | return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr, |
2049 | change_size); | |
385820a3 MF |
2050 | } |
2051 | ||
293b2f70 TM |
2052 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
2053 | size_t count) | |
2054 | { | |
2055 | int ret = 0; | |
2056 | unsigned int extent_flags; | |
2057 | u32 cpos, clusters, extent_len, phys_cpos; | |
2058 | struct super_block *sb = inode->i_sb; | |
2059 | ||
2060 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || | |
84e40080 | 2061 | !ocfs2_is_refcount_inode(inode) || |
2f48d593 | 2062 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) |
293b2f70 TM |
2063 | return 0; |
2064 | ||
2065 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
2066 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
2067 | ||
2068 | while (clusters) { | |
2069 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, | |
2070 | &extent_flags); | |
2071 | if (ret < 0) { | |
2072 | mlog_errno(ret); | |
2073 | goto out; | |
2074 | } | |
2075 | ||
2076 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { | |
2077 | ret = 1; | |
2078 | break; | |
2079 | } | |
2080 | ||
2081 | if (extent_len > clusters) | |
2082 | extent_len = clusters; | |
2083 | ||
2084 | clusters -= extent_len; | |
2085 | cpos += extent_len; | |
2086 | } | |
2087 | out: | |
2088 | return ret; | |
2089 | } | |
2090 | ||
a11f7e63 MF |
2091 | static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos) |
2092 | { | |
2093 | int blockmask = inode->i_sb->s_blocksize - 1; | |
2094 | loff_t final_size = pos + count; | |
2095 | ||
2096 | if ((pos & blockmask) || (final_size & blockmask)) | |
2097 | return 1; | |
2098 | return 0; | |
2099 | } | |
2100 | ||
e74540b2 SZ |
2101 | static int ocfs2_inode_lock_for_extent_tree(struct inode *inode, |
2102 | struct buffer_head **di_bh, | |
2103 | int meta_level, | |
e74540b2 SZ |
2104 | int write_sem, |
2105 | int wait) | |
293b2f70 | 2106 | { |
e74540b2 | 2107 | int ret = 0; |
293b2f70 | 2108 | |
e74540b2 | 2109 | if (wait) |
2d797e9f | 2110 | ret = ocfs2_inode_lock(inode, di_bh, meta_level); |
e74540b2 | 2111 | else |
2d797e9f | 2112 | ret = ocfs2_try_inode_lock(inode, di_bh, meta_level); |
e74540b2 | 2113 | if (ret < 0) |
293b2f70 | 2114 | goto out; |
e74540b2 SZ |
2115 | |
2116 | if (wait) { | |
2117 | if (write_sem) | |
2118 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
2119 | else | |
2120 | down_read(&OCFS2_I(inode)->ip_alloc_sem); | |
2121 | } else { | |
2122 | if (write_sem) | |
2123 | ret = down_write_trylock(&OCFS2_I(inode)->ip_alloc_sem); | |
2124 | else | |
2125 | ret = down_read_trylock(&OCFS2_I(inode)->ip_alloc_sem); | |
2126 | ||
2127 | if (!ret) { | |
2128 | ret = -EAGAIN; | |
2129 | goto out_unlock; | |
2130 | } | |
293b2f70 TM |
2131 | } |
2132 | ||
e74540b2 | 2133 | return ret; |
293b2f70 | 2134 | |
e74540b2 SZ |
2135 | out_unlock: |
2136 | brelse(*di_bh); | |
2d797e9f | 2137 | *di_bh = NULL; |
e74540b2 | 2138 | ocfs2_inode_unlock(inode, meta_level); |
293b2f70 | 2139 | out: |
293b2f70 TM |
2140 | return ret; |
2141 | } | |
2142 | ||
e74540b2 SZ |
2143 | static void ocfs2_inode_unlock_for_extent_tree(struct inode *inode, |
2144 | struct buffer_head **di_bh, | |
2145 | int meta_level, | |
2146 | int write_sem) | |
2147 | { | |
2148 | if (write_sem) | |
2149 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
2150 | else | |
2151 | up_read(&OCFS2_I(inode)->ip_alloc_sem); | |
2152 | ||
2153 | brelse(*di_bh); | |
2154 | *di_bh = NULL; | |
2155 | ||
2156 | if (meta_level >= 0) | |
2157 | ocfs2_inode_unlock(inode, meta_level); | |
2158 | } | |
2159 | ||
b8908236 | 2160 | static int ocfs2_prepare_inode_for_write(struct file *file, |
c4c2416a | 2161 | loff_t pos, size_t count, int wait) |
ccd979bd | 2162 | { |
c4c2416a | 2163 | int ret = 0, meta_level = 0, overwrite_io = 0; |
e74540b2 | 2164 | int write_sem = 0; |
b8908236 | 2165 | struct dentry *dentry = file->f_path.dentry; |
2b0143b5 | 2166 | struct inode *inode = d_inode(dentry); |
c4c2416a | 2167 | struct buffer_head *di_bh = NULL; |
e74540b2 SZ |
2168 | u32 cpos; |
2169 | u32 clusters; | |
ccd979bd | 2170 | |
2bd63216 | 2171 | /* |
65ed39d6 MF |
2172 | * We start with a read level meta lock and only jump to an ex |
2173 | * if we need to make modifications here. | |
ccd979bd | 2174 | */ |
ccd979bd | 2175 | for(;;) { |
e74540b2 SZ |
2176 | ret = ocfs2_inode_lock_for_extent_tree(inode, |
2177 | &di_bh, | |
2178 | meta_level, | |
e74540b2 SZ |
2179 | write_sem, |
2180 | wait); | |
ccd979bd | 2181 | if (ret < 0) { |
c4c2416a GH |
2182 | if (ret != -EAGAIN) |
2183 | mlog_errno(ret); | |
ccd979bd MF |
2184 | goto out; |
2185 | } | |
2186 | ||
c4c2416a GH |
2187 | /* |
2188 | * Check if IO will overwrite allocated blocks in case | |
2189 | * IOCB_NOWAIT flag is set. | |
2190 | */ | |
2191 | if (!wait && !overwrite_io) { | |
2192 | overwrite_io = 1; | |
c4c2416a GH |
2193 | |
2194 | ret = ocfs2_overwrite_io(inode, di_bh, pos, count); | |
c4c2416a GH |
2195 | if (ret < 0) { |
2196 | if (ret != -EAGAIN) | |
2197 | mlog_errno(ret); | |
2198 | goto out_unlock; | |
2199 | } | |
2200 | } | |
2201 | ||
ccd979bd MF |
2202 | /* Clear suid / sgid if necessary. We do this here |
2203 | * instead of later in the write path because | |
2204 | * remove_suid() calls ->setattr without any hint that | |
2205 | * we may have already done our cluster locking. Since | |
2206 | * ocfs2_setattr() *must* take cluster locks to | |
42b2aa86 | 2207 | * proceed, this will lead us to recursively lock the |
ccd979bd MF |
2208 | * inode. There's also the dinode i_size state which |
2209 | * can be lost via setattr during extending writes (we | |
2210 | * set inode->i_size at the end of a write. */ | |
8659ac25 | 2211 | if (should_remove_suid(dentry)) { |
ccd979bd | 2212 | if (meta_level == 0) { |
e74540b2 SZ |
2213 | ocfs2_inode_unlock_for_extent_tree(inode, |
2214 | &di_bh, | |
2215 | meta_level, | |
2216 | write_sem); | |
ccd979bd MF |
2217 | meta_level = 1; |
2218 | continue; | |
2219 | } | |
2220 | ||
2221 | ret = ocfs2_write_remove_suid(inode); | |
2222 | if (ret < 0) { | |
2223 | mlog_errno(ret); | |
8659ac25 | 2224 | goto out_unlock; |
ccd979bd MF |
2225 | } |
2226 | } | |
2227 | ||
90320251 | 2228 | ret = ocfs2_check_range_for_refcount(inode, pos, count); |
293b2f70 | 2229 | if (ret == 1) { |
e74540b2 SZ |
2230 | ocfs2_inode_unlock_for_extent_tree(inode, |
2231 | &di_bh, | |
2232 | meta_level, | |
2233 | write_sem); | |
2d797e9f GH |
2234 | meta_level = 1; |
2235 | write_sem = 1; | |
e74540b2 SZ |
2236 | ret = ocfs2_inode_lock_for_extent_tree(inode, |
2237 | &di_bh, | |
2238 | meta_level, | |
2d797e9f | 2239 | write_sem, |
e74540b2 | 2240 | wait); |
e74540b2 SZ |
2241 | if (ret < 0) { |
2242 | if (ret != -EAGAIN) | |
2243 | mlog_errno(ret); | |
2244 | goto out; | |
2245 | } | |
2246 | ||
2247 | cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
2248 | clusters = | |
2249 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; | |
2250 | ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX); | |
293b2f70 TM |
2251 | } |
2252 | ||
2253 | if (ret < 0) { | |
e74540b2 SZ |
2254 | if (ret != -EAGAIN) |
2255 | mlog_errno(ret); | |
293b2f70 TM |
2256 | goto out_unlock; |
2257 | } | |
2258 | ||
ccd979bd MF |
2259 | break; |
2260 | } | |
2261 | ||
8659ac25 | 2262 | out_unlock: |
468eedde | 2263 | trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno, |
c4c2416a GH |
2264 | pos, count, wait); |
2265 | ||
e74540b2 SZ |
2266 | ocfs2_inode_unlock_for_extent_tree(inode, |
2267 | &di_bh, | |
2268 | meta_level, | |
2269 | write_sem); | |
8659ac25 TY |
2270 | |
2271 | out: | |
2272 | return ret; | |
2273 | } | |
2274 | ||
3ef045c3 AV |
2275 | static ssize_t ocfs2_file_write_iter(struct kiocb *iocb, |
2276 | struct iov_iter *from) | |
8659ac25 | 2277 | { |
c4c2416a | 2278 | int rw_level; |
9517bac6 | 2279 | ssize_t written = 0; |
3309dd04 | 2280 | ssize_t ret; |
f1f973ff | 2281 | size_t count = iov_iter_count(from); |
9517bac6 | 2282 | struct file *file = iocb->ki_filp; |
496ad9aa | 2283 | struct inode *inode = file_inode(file); |
9ea2d32f | 2284 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
7bdb0d18 TY |
2285 | int full_coherency = !(osb->s_mount_opt & |
2286 | OCFS2_MOUNT_COHERENCY_BUFFERED); | |
e63890f3 | 2287 | void *saved_ki_complete = NULL; |
faaebf18 JQ |
2288 | int append_write = ((iocb->ki_pos + count) >= |
2289 | i_size_read(inode) ? 1 : 0); | |
c4c2416a GH |
2290 | int direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0; |
2291 | int nowait = iocb->ki_flags & IOCB_NOWAIT ? 1 : 0; | |
9517bac6 | 2292 | |
1202d4ba | 2293 | trace_ocfs2_file_write_iter(inode, file, file->f_path.dentry, |
468eedde TM |
2294 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
2295 | file->f_path.dentry->d_name.len, | |
2296 | file->f_path.dentry->d_name.name, | |
3ef045c3 | 2297 | (unsigned int)from->nr_segs); /* GRRRRR */ |
8659ac25 | 2298 | |
c4c2416a GH |
2299 | if (!direct_io && nowait) |
2300 | return -EOPNOTSUPP; | |
2301 | ||
66ee59af | 2302 | if (count == 0) |
8659ac25 TY |
2303 | return 0; |
2304 | ||
c4c2416a GH |
2305 | if (nowait) { |
2306 | if (!inode_trylock(inode)) | |
2307 | return -EAGAIN; | |
2308 | } else | |
2309 | inode_lock(inode); | |
9517bac6 | 2310 | |
7bdb0d18 TY |
2311 | /* |
2312 | * Concurrent O_DIRECT writes are allowed with | |
2313 | * mount_option "coherency=buffered". | |
faaebf18 | 2314 | * For append write, we must take rw EX. |
7bdb0d18 | 2315 | */ |
faaebf18 | 2316 | rw_level = (!direct_io || full_coherency || append_write); |
7bdb0d18 | 2317 | |
c4c2416a GH |
2318 | if (nowait) |
2319 | ret = ocfs2_try_rw_lock(inode, rw_level); | |
2320 | else | |
2321 | ret = ocfs2_rw_lock(inode, rw_level); | |
8659ac25 | 2322 | if (ret < 0) { |
c4c2416a GH |
2323 | if (ret != -EAGAIN) |
2324 | mlog_errno(ret); | |
fa5a0eb3 | 2325 | goto out_mutex; |
8659ac25 TY |
2326 | } |
2327 | ||
7bdb0d18 TY |
2328 | /* |
2329 | * O_DIRECT writes with "coherency=full" need to take EX cluster | |
2330 | * inode_lock to guarantee coherency. | |
2331 | */ | |
2332 | if (direct_io && full_coherency) { | |
2333 | /* | |
2334 | * We need to take and drop the inode lock to force | |
2335 | * other nodes to drop their caches. Buffered I/O | |
2336 | * already does this in write_begin(). | |
2337 | */ | |
c4c2416a GH |
2338 | if (nowait) |
2339 | ret = ocfs2_try_inode_lock(inode, NULL, 1); | |
2340 | else | |
2341 | ret = ocfs2_inode_lock(inode, NULL, 1); | |
7bdb0d18 | 2342 | if (ret < 0) { |
c4c2416a GH |
2343 | if (ret != -EAGAIN) |
2344 | mlog_errno(ret); | |
afe1bb73 | 2345 | goto out; |
7bdb0d18 TY |
2346 | } |
2347 | ||
2348 | ocfs2_inode_unlock(inode, 1); | |
2349 | } | |
2350 | ||
3309dd04 AV |
2351 | ret = generic_write_checks(iocb, from); |
2352 | if (ret <= 0) { | |
2353 | if (ret) | |
2354 | mlog_errno(ret); | |
90320251 AV |
2355 | goto out; |
2356 | } | |
3309dd04 | 2357 | count = ret; |
90320251 | 2358 | |
c4c2416a | 2359 | ret = ocfs2_prepare_inode_for_write(file, iocb->ki_pos, count, !nowait); |
8659ac25 | 2360 | if (ret < 0) { |
c4c2416a GH |
2361 | if (ret != -EAGAIN) |
2362 | mlog_errno(ret); | |
8659ac25 TY |
2363 | goto out; |
2364 | } | |
ccd979bd | 2365 | |
e63890f3 RD |
2366 | if (direct_io && !is_sync_kiocb(iocb) && |
2367 | ocfs2_is_io_unaligned(inode, count, iocb->ki_pos)) { | |
a11f7e63 | 2368 | /* |
e63890f3 | 2369 | * Make it a sync io if it's an unaligned aio. |
a11f7e63 | 2370 | */ |
e63890f3 | 2371 | saved_ki_complete = xchg(&iocb->ki_complete, NULL); |
a11f7e63 MF |
2372 | } |
2373 | ||
ccd979bd | 2374 | /* communicate with ocfs2_dio_end_io */ |
7cdfc3a1 | 2375 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd | 2376 | |
7da839c4 | 2377 | written = __generic_file_write_iter(iocb, from); |
ccd979bd | 2378 | /* buffered aio wouldn't have proper lock coverage today */ |
9e985787 | 2379 | BUG_ON(written == -EIOCBQUEUED && !direct_io); |
ccd979bd | 2380 | |
aa1057b3 RD |
2381 | /* |
2382 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io | |
2383 | * function pointer which is called when o_direct io completes so that | |
2384 | * it can unlock our rw lock. | |
2385 | * Unfortunately there are error cases which call end_io and others | |
2386 | * that don't. so we don't have to unlock the rw_lock if either an | |
2387 | * async dio is going to do it in the future or an end_io after an | |
2388 | * error has already done it. | |
2389 | */ | |
2390 | if ((written == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { | |
2391 | rw_level = -1; | |
aa1057b3 RD |
2392 | } |
2393 | ||
64b4e252 | 2394 | if (unlikely(written <= 0)) |
e63890f3 | 2395 | goto out; |
64b4e252 | 2396 | |
7da839c4 | 2397 | if (((file->f_flags & O_DSYNC) && !direct_io) || |
f1f973ff | 2398 | IS_SYNC(inode)) { |
64b4e252 AV |
2399 | ret = filemap_fdatawrite_range(file->f_mapping, |
2400 | iocb->ki_pos - written, | |
2401 | iocb->ki_pos - 1); | |
918941a3 JK |
2402 | if (ret < 0) |
2403 | written = ret; | |
2404 | ||
86b9c6f3 | 2405 | if (!ret) { |
2b4e30fb | 2406 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
9ea2d32f MF |
2407 | if (ret < 0) |
2408 | written = ret; | |
2409 | } | |
918941a3 JK |
2410 | |
2411 | if (!ret) | |
64b4e252 AV |
2412 | ret = filemap_fdatawait_range(file->f_mapping, |
2413 | iocb->ki_pos - written, | |
2414 | iocb->ki_pos - 1); | |
9ea2d32f MF |
2415 | } |
2416 | ||
ccd979bd | 2417 | out: |
e63890f3 RD |
2418 | if (saved_ki_complete) |
2419 | xchg(&iocb->ki_complete, saved_ki_complete); | |
2420 | ||
9517bac6 MF |
2421 | if (rw_level != -1) |
2422 | ocfs2_rw_unlock(inode, rw_level); | |
2423 | ||
fa5a0eb3 | 2424 | out_mutex: |
5955102c | 2425 | inode_unlock(inode); |
ccd979bd | 2426 | |
812e7a6a WW |
2427 | if (written) |
2428 | ret = written; | |
812e7a6a | 2429 | return ret; |
ccd979bd MF |
2430 | } |
2431 | ||
3cd9ad5a AV |
2432 | static ssize_t ocfs2_file_read_iter(struct kiocb *iocb, |
2433 | struct iov_iter *to) | |
ccd979bd | 2434 | { |
fa5a0eb3 | 2435 | int ret = 0, rw_level = -1, lock_level = 0; |
ccd979bd | 2436 | struct file *filp = iocb->ki_filp; |
496ad9aa | 2437 | struct inode *inode = file_inode(filp); |
c4c2416a GH |
2438 | int direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0; |
2439 | int nowait = iocb->ki_flags & IOCB_NOWAIT ? 1 : 0; | |
ccd979bd | 2440 | |
1202d4ba | 2441 | trace_ocfs2_file_read_iter(inode, filp, filp->f_path.dentry, |
468eedde TM |
2442 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
2443 | filp->f_path.dentry->d_name.len, | |
3cd9ad5a AV |
2444 | filp->f_path.dentry->d_name.name, |
2445 | to->nr_segs); /* GRRRRR */ | |
468eedde | 2446 | |
ccd979bd MF |
2447 | |
2448 | if (!inode) { | |
2449 | ret = -EINVAL; | |
2450 | mlog_errno(ret); | |
2451 | goto bail; | |
2452 | } | |
2453 | ||
c4c2416a GH |
2454 | if (!direct_io && nowait) |
2455 | return -EOPNOTSUPP; | |
2456 | ||
2bd63216 | 2457 | /* |
ccd979bd MF |
2458 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
2459 | * need locks to protect pending reads from racing with truncate. | |
2460 | */ | |
c4c2416a GH |
2461 | if (direct_io) { |
2462 | if (nowait) | |
2463 | ret = ocfs2_try_rw_lock(inode, 0); | |
2464 | else | |
2465 | ret = ocfs2_rw_lock(inode, 0); | |
2466 | ||
ccd979bd | 2467 | if (ret < 0) { |
c4c2416a GH |
2468 | if (ret != -EAGAIN) |
2469 | mlog_errno(ret); | |
ccd979bd MF |
2470 | goto bail; |
2471 | } | |
2472 | rw_level = 0; | |
2473 | /* communicate with ocfs2_dio_end_io */ | |
7cdfc3a1 | 2474 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd MF |
2475 | } |
2476 | ||
c4374f8a MF |
2477 | /* |
2478 | * We're fine letting folks race truncates and extending | |
2479 | * writes with read across the cluster, just like they can | |
2480 | * locally. Hence no rw_lock during read. | |
2bd63216 | 2481 | * |
c4374f8a MF |
2482 | * Take and drop the meta data lock to update inode fields |
2483 | * like i_size. This allows the checks down below | |
1202d4ba | 2484 | * generic_file_read_iter() a chance of actually working. |
c4374f8a | 2485 | */ |
c4c2416a GH |
2486 | ret = ocfs2_inode_lock_atime(inode, filp->f_path.mnt, &lock_level, |
2487 | !nowait); | |
c4374f8a | 2488 | if (ret < 0) { |
c4c2416a GH |
2489 | if (ret != -EAGAIN) |
2490 | mlog_errno(ret); | |
c4374f8a MF |
2491 | goto bail; |
2492 | } | |
e63aecb6 | 2493 | ocfs2_inode_unlock(inode, lock_level); |
c4374f8a | 2494 | |
3cd9ad5a | 2495 | ret = generic_file_read_iter(iocb, to); |
1202d4ba | 2496 | trace_generic_file_read_iter_ret(ret); |
ccd979bd MF |
2497 | |
2498 | /* buffered aio wouldn't have proper lock coverage today */ | |
9e985787 | 2499 | BUG_ON(ret == -EIOCBQUEUED && !direct_io); |
ccd979bd | 2500 | |
3ef045c3 | 2501 | /* see ocfs2_file_write_iter */ |
ccd979bd MF |
2502 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
2503 | rw_level = -1; | |
ccd979bd MF |
2504 | } |
2505 | ||
2506 | bail: | |
2bd63216 | 2507 | if (rw_level != -1) |
ccd979bd | 2508 | ocfs2_rw_unlock(inode, rw_level); |
ccd979bd MF |
2509 | |
2510 | return ret; | |
2511 | } | |
2512 | ||
93862d5e | 2513 | /* Refer generic_file_llseek_unlocked() */ |
965c8e59 | 2514 | static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence) |
93862d5e SM |
2515 | { |
2516 | struct inode *inode = file->f_mapping->host; | |
2517 | int ret = 0; | |
2518 | ||
5955102c | 2519 | inode_lock(inode); |
93862d5e | 2520 | |
965c8e59 | 2521 | switch (whence) { |
93862d5e SM |
2522 | case SEEK_SET: |
2523 | break; | |
2524 | case SEEK_END: | |
c8d888d9 J |
2525 | /* SEEK_END requires the OCFS2 inode lock for the file |
2526 | * because it references the file's size. | |
2527 | */ | |
2528 | ret = ocfs2_inode_lock(inode, NULL, 0); | |
2529 | if (ret < 0) { | |
2530 | mlog_errno(ret); | |
2531 | goto out; | |
2532 | } | |
2533 | offset += i_size_read(inode); | |
2534 | ocfs2_inode_unlock(inode, 0); | |
93862d5e SM |
2535 | break; |
2536 | case SEEK_CUR: | |
2537 | if (offset == 0) { | |
2538 | offset = file->f_pos; | |
2539 | goto out; | |
2540 | } | |
2541 | offset += file->f_pos; | |
2542 | break; | |
2543 | case SEEK_DATA: | |
2544 | case SEEK_HOLE: | |
965c8e59 | 2545 | ret = ocfs2_seek_data_hole_offset(file, &offset, whence); |
93862d5e SM |
2546 | if (ret) |
2547 | goto out; | |
2548 | break; | |
2549 | default: | |
2550 | ret = -EINVAL; | |
2551 | goto out; | |
2552 | } | |
2553 | ||
46a1c2c7 | 2554 | offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes); |
93862d5e SM |
2555 | |
2556 | out: | |
5955102c | 2557 | inode_unlock(inode); |
93862d5e SM |
2558 | if (ret) |
2559 | return ret; | |
2560 | return offset; | |
2561 | } | |
2562 | ||
42ec3d4c DW |
2563 | static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in, |
2564 | struct file *file_out, loff_t pos_out, | |
2565 | loff_t len, unsigned int remap_flags) | |
29ac8e85 | 2566 | { |
65f098e9 DW |
2567 | struct inode *inode_in = file_inode(file_in); |
2568 | struct inode *inode_out = file_inode(file_out); | |
2569 | struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb); | |
2570 | struct buffer_head *in_bh = NULL, *out_bh = NULL; | |
2571 | bool same_inode = (inode_in == inode_out); | |
2572 | loff_t remapped = 0; | |
2573 | ssize_t ret; | |
2574 | ||
2e5dfc99 DW |
2575 | if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY)) |
2576 | return -EINVAL; | |
65f098e9 DW |
2577 | if (!ocfs2_refcount_tree(osb)) |
2578 | return -EOPNOTSUPP; | |
2579 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
2580 | return -EROFS; | |
29ac8e85 | 2581 | |
65f098e9 DW |
2582 | /* Lock both files against IO */ |
2583 | ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh); | |
2584 | if (ret) | |
2585 | return ret; | |
2586 | ||
2587 | /* Check file eligibility and prepare for block sharing. */ | |
2588 | ret = -EINVAL; | |
2589 | if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) || | |
2590 | (OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE)) | |
2591 | goto out_unlock; | |
2592 | ||
2593 | ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out, | |
2594 | &len, remap_flags); | |
2595 | if (ret < 0 || len == 0) | |
2596 | goto out_unlock; | |
2597 | ||
2598 | /* Lock out changes to the allocation maps and remap. */ | |
2599 | down_write(&OCFS2_I(inode_in)->ip_alloc_sem); | |
2600 | if (!same_inode) | |
2601 | down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem, | |
2602 | SINGLE_DEPTH_NESTING); | |
2603 | ||
2604 | /* Zap any page cache for the destination file's range. */ | |
2605 | truncate_inode_pages_range(&inode_out->i_data, | |
2606 | round_down(pos_out, PAGE_SIZE), | |
2607 | round_up(pos_out + len, PAGE_SIZE) - 1); | |
2608 | ||
2609 | remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in, | |
2610 | inode_out, out_bh, pos_out, len); | |
2611 | up_write(&OCFS2_I(inode_in)->ip_alloc_sem); | |
2612 | if (!same_inode) | |
2613 | up_write(&OCFS2_I(inode_out)->ip_alloc_sem); | |
2614 | if (remapped < 0) { | |
2615 | ret = remapped; | |
2616 | mlog_errno(ret); | |
2617 | goto out_unlock; | |
2618 | } | |
2619 | ||
2620 | /* | |
2621 | * Empty the extent map so that we may get the right extent | |
2622 | * record from the disk. | |
2623 | */ | |
2624 | ocfs2_extent_map_trunc(inode_in, 0); | |
2625 | ocfs2_extent_map_trunc(inode_out, 0); | |
2626 | ||
2627 | ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len); | |
2628 | if (ret) { | |
2629 | mlog_errno(ret); | |
2630 | goto out_unlock; | |
2631 | } | |
2632 | ||
2633 | out_unlock: | |
2634 | ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh); | |
2635 | return remapped > 0 ? remapped : ret; | |
29ac8e85 DW |
2636 | } |
2637 | ||
92e1d5be | 2638 | const struct inode_operations ocfs2_file_iops = { |
ccd979bd MF |
2639 | .setattr = ocfs2_setattr, |
2640 | .getattr = ocfs2_getattr, | |
d38eb8db | 2641 | .permission = ocfs2_permission, |
cf1d6c76 | 2642 | .listxattr = ocfs2_listxattr, |
00dc417f | 2643 | .fiemap = ocfs2_fiemap, |
4e34e719 | 2644 | .get_acl = ocfs2_iop_get_acl, |
702e5bc6 | 2645 | .set_acl = ocfs2_iop_set_acl, |
ccd979bd MF |
2646 | }; |
2647 | ||
92e1d5be | 2648 | const struct inode_operations ocfs2_special_file_iops = { |
ccd979bd MF |
2649 | .setattr = ocfs2_setattr, |
2650 | .getattr = ocfs2_getattr, | |
d38eb8db | 2651 | .permission = ocfs2_permission, |
4e34e719 | 2652 | .get_acl = ocfs2_iop_get_acl, |
702e5bc6 | 2653 | .set_acl = ocfs2_iop_set_acl, |
ccd979bd MF |
2654 | }; |
2655 | ||
53da4939 MF |
2656 | /* |
2657 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with | |
2658 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! | |
2659 | */ | |
4b6f5d20 | 2660 | const struct file_operations ocfs2_fops = { |
93862d5e | 2661 | .llseek = ocfs2_file_llseek, |
ccd979bd MF |
2662 | .mmap = ocfs2_mmap, |
2663 | .fsync = ocfs2_sync_file, | |
2664 | .release = ocfs2_file_release, | |
2665 | .open = ocfs2_file_open, | |
3cd9ad5a | 2666 | .read_iter = ocfs2_file_read_iter, |
3ef045c3 | 2667 | .write_iter = ocfs2_file_write_iter, |
c9ec1488 | 2668 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2669 | #ifdef CONFIG_COMPAT |
2670 | .compat_ioctl = ocfs2_compat_ioctl, | |
2671 | #endif | |
53da4939 | 2672 | .lock = ocfs2_lock, |
53fc622b | 2673 | .flock = ocfs2_flock, |
82c156f8 | 2674 | .splice_read = generic_file_splice_read, |
6dc8bc0f | 2675 | .splice_write = iter_file_splice_write, |
2fe17c10 | 2676 | .fallocate = ocfs2_fallocate, |
2e5dfc99 | 2677 | .remap_file_range = ocfs2_remap_file_range, |
ccd979bd MF |
2678 | }; |
2679 | ||
4b6f5d20 | 2680 | const struct file_operations ocfs2_dops = { |
32c3c0e2 | 2681 | .llseek = generic_file_llseek, |
ccd979bd | 2682 | .read = generic_read_dir, |
3704412b | 2683 | .iterate = ocfs2_readdir, |
ccd979bd | 2684 | .fsync = ocfs2_sync_file, |
53fc622b MF |
2685 | .release = ocfs2_dir_release, |
2686 | .open = ocfs2_dir_open, | |
c9ec1488 | 2687 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2688 | #ifdef CONFIG_COMPAT |
2689 | .compat_ioctl = ocfs2_compat_ioctl, | |
53da4939 MF |
2690 | #endif |
2691 | .lock = ocfs2_lock, | |
2692 | .flock = ocfs2_flock, | |
2693 | }; | |
2694 | ||
2695 | /* | |
2696 | * POSIX-lockless variants of our file_operations. | |
2697 | * | |
2698 | * These will be used if the underlying cluster stack does not support | |
2699 | * posix file locking, if the user passes the "localflocks" mount | |
2700 | * option, or if we have a local-only fs. | |
2701 | * | |
2702 | * ocfs2_flock is in here because all stacks handle UNIX file locks, | |
2703 | * so we still want it in the case of no stack support for | |
2704 | * plocks. Internally, it will do the right thing when asked to ignore | |
2705 | * the cluster. | |
2706 | */ | |
2707 | const struct file_operations ocfs2_fops_no_plocks = { | |
93862d5e | 2708 | .llseek = ocfs2_file_llseek, |
53da4939 MF |
2709 | .mmap = ocfs2_mmap, |
2710 | .fsync = ocfs2_sync_file, | |
2711 | .release = ocfs2_file_release, | |
2712 | .open = ocfs2_file_open, | |
3cd9ad5a | 2713 | .read_iter = ocfs2_file_read_iter, |
3ef045c3 | 2714 | .write_iter = ocfs2_file_write_iter, |
53da4939 MF |
2715 | .unlocked_ioctl = ocfs2_ioctl, |
2716 | #ifdef CONFIG_COMPAT | |
2717 | .compat_ioctl = ocfs2_compat_ioctl, | |
2718 | #endif | |
2719 | .flock = ocfs2_flock, | |
82c156f8 | 2720 | .splice_read = generic_file_splice_read, |
6dc8bc0f | 2721 | .splice_write = iter_file_splice_write, |
3d1c1829 | 2722 | .fallocate = ocfs2_fallocate, |
2e5dfc99 | 2723 | .remap_file_range = ocfs2_remap_file_range, |
53da4939 MF |
2724 | }; |
2725 | ||
2726 | const struct file_operations ocfs2_dops_no_plocks = { | |
2727 | .llseek = generic_file_llseek, | |
2728 | .read = generic_read_dir, | |
3704412b | 2729 | .iterate = ocfs2_readdir, |
53da4939 MF |
2730 | .fsync = ocfs2_sync_file, |
2731 | .release = ocfs2_dir_release, | |
2732 | .open = ocfs2_dir_open, | |
2733 | .unlocked_ioctl = ocfs2_ioctl, | |
2734 | #ifdef CONFIG_COMPAT | |
2735 | .compat_ioctl = ocfs2_compat_ioctl, | |
586d232b | 2736 | #endif |
53fc622b | 2737 | .flock = ocfs2_flock, |
ccd979bd | 2738 | }; |