Commit | Line | Data |
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328970de | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
fa60ce2c | 2 | /* |
ccd979bd MF |
3 | * file.c |
4 | * | |
5 | * File open, close, extend, truncate | |
6 | * | |
7 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
ccd979bd MF |
8 | */ |
9 | ||
16f7e0fe | 10 | #include <linux/capability.h> |
ccd979bd MF |
11 | #include <linux/fs.h> |
12 | #include <linux/types.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/highmem.h> | |
15 | #include <linux/pagemap.h> | |
16 | #include <linux/uio.h> | |
e2057c5a | 17 | #include <linux/sched.h> |
d6b29d7c | 18 | #include <linux/splice.h> |
7f1a37e3 | 19 | #include <linux/mount.h> |
9517bac6 | 20 | #include <linux/writeback.h> |
385820a3 | 21 | #include <linux/falloc.h> |
a90714c1 | 22 | #include <linux/quotaops.h> |
04eda1a1 | 23 | #include <linux/blkdev.h> |
66114cad | 24 | #include <linux/backing-dev.h> |
ccd979bd | 25 | |
ccd979bd MF |
26 | #include <cluster/masklog.h> |
27 | ||
28 | #include "ocfs2.h" | |
29 | ||
30 | #include "alloc.h" | |
31 | #include "aops.h" | |
32 | #include "dir.h" | |
33 | #include "dlmglue.h" | |
34 | #include "extent_map.h" | |
35 | #include "file.h" | |
36 | #include "sysfile.h" | |
37 | #include "inode.h" | |
ca4d147e | 38 | #include "ioctl.h" |
ccd979bd | 39 | #include "journal.h" |
53fc622b | 40 | #include "locks.h" |
ccd979bd MF |
41 | #include "mmap.h" |
42 | #include "suballoc.h" | |
43 | #include "super.h" | |
cf1d6c76 | 44 | #include "xattr.h" |
23fc2702 | 45 | #include "acl.h" |
a90714c1 | 46 | #include "quota.h" |
293b2f70 | 47 | #include "refcounttree.h" |
468eedde | 48 | #include "ocfs2_trace.h" |
ccd979bd MF |
49 | |
50 | #include "buffer_head_io.h" | |
51 | ||
53fc622b MF |
52 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
53 | { | |
54 | struct ocfs2_file_private *fp; | |
55 | ||
56 | fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL); | |
57 | if (!fp) | |
58 | return -ENOMEM; | |
59 | ||
60 | fp->fp_file = file; | |
61 | mutex_init(&fp->fp_mutex); | |
62 | ocfs2_file_lock_res_init(&fp->fp_flock, fp); | |
63 | file->private_data = fp; | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | static void ocfs2_free_file_private(struct inode *inode, struct file *file) | |
69 | { | |
70 | struct ocfs2_file_private *fp = file->private_data; | |
71 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
72 | ||
73 | if (fp) { | |
74 | ocfs2_simple_drop_lockres(osb, &fp->fp_flock); | |
75 | ocfs2_lock_res_free(&fp->fp_flock); | |
76 | kfree(fp); | |
77 | file->private_data = NULL; | |
78 | } | |
79 | } | |
80 | ||
ccd979bd MF |
81 | static int ocfs2_file_open(struct inode *inode, struct file *file) |
82 | { | |
83 | int status; | |
84 | int mode = file->f_flags; | |
85 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
86 | ||
468eedde | 87 | trace_ocfs2_file_open(inode, file, file->f_path.dentry, |
d324cd4c | 88 | (unsigned long long)oi->ip_blkno, |
468eedde TM |
89 | file->f_path.dentry->d_name.len, |
90 | file->f_path.dentry->d_name.name, mode); | |
ccd979bd | 91 | |
9c89fe0a JK |
92 | if (file->f_mode & FMODE_WRITE) { |
93 | status = dquot_initialize(inode); | |
94 | if (status) | |
95 | goto leave; | |
96 | } | |
907f4554 | 97 | |
ccd979bd MF |
98 | spin_lock(&oi->ip_lock); |
99 | ||
100 | /* Check that the inode hasn't been wiped from disk by another | |
101 | * node. If it hasn't then we're safe as long as we hold the | |
102 | * spin lock until our increment of open count. */ | |
d324cd4c | 103 | if (oi->ip_flags & OCFS2_INODE_DELETED) { |
ccd979bd MF |
104 | spin_unlock(&oi->ip_lock); |
105 | ||
106 | status = -ENOENT; | |
107 | goto leave; | |
108 | } | |
109 | ||
110 | if (mode & O_DIRECT) | |
111 | oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT; | |
112 | ||
113 | oi->ip_open_count++; | |
114 | spin_unlock(&oi->ip_lock); | |
53fc622b MF |
115 | |
116 | status = ocfs2_init_file_private(inode, file); | |
117 | if (status) { | |
118 | /* | |
119 | * We want to set open count back if we're failing the | |
120 | * open. | |
121 | */ | |
122 | spin_lock(&oi->ip_lock); | |
123 | oi->ip_open_count--; | |
124 | spin_unlock(&oi->ip_lock); | |
125 | } | |
126 | ||
c4c2416a GH |
127 | file->f_mode |= FMODE_NOWAIT; |
128 | ||
ccd979bd | 129 | leave: |
ccd979bd MF |
130 | return status; |
131 | } | |
132 | ||
133 | static int ocfs2_file_release(struct inode *inode, struct file *file) | |
134 | { | |
135 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
136 | ||
ccd979bd MF |
137 | spin_lock(&oi->ip_lock); |
138 | if (!--oi->ip_open_count) | |
139 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; | |
468eedde TM |
140 | |
141 | trace_ocfs2_file_release(inode, file, file->f_path.dentry, | |
142 | oi->ip_blkno, | |
143 | file->f_path.dentry->d_name.len, | |
144 | file->f_path.dentry->d_name.name, | |
145 | oi->ip_open_count); | |
ccd979bd MF |
146 | spin_unlock(&oi->ip_lock); |
147 | ||
53fc622b MF |
148 | ocfs2_free_file_private(inode, file); |
149 | ||
ccd979bd MF |
150 | return 0; |
151 | } | |
152 | ||
53fc622b MF |
153 | static int ocfs2_dir_open(struct inode *inode, struct file *file) |
154 | { | |
155 | return ocfs2_init_file_private(inode, file); | |
156 | } | |
157 | ||
158 | static int ocfs2_dir_release(struct inode *inode, struct file *file) | |
159 | { | |
160 | ocfs2_free_file_private(inode, file); | |
161 | return 0; | |
162 | } | |
163 | ||
02c24a82 JB |
164 | static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end, |
165 | int datasync) | |
ccd979bd MF |
166 | { |
167 | int err = 0; | |
7ea80859 | 168 | struct inode *inode = file->f_mapping->host; |
ccd979bd | 169 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2931cdcb DW |
170 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
171 | journal_t *journal = osb->journal->j_journal; | |
172 | int ret; | |
173 | tid_t commit_tid; | |
174 | bool needs_barrier = false; | |
ccd979bd | 175 | |
468eedde | 176 | trace_ocfs2_sync_file(inode, file, file->f_path.dentry, |
d324cd4c | 177 | oi->ip_blkno, |
468eedde TM |
178 | file->f_path.dentry->d_name.len, |
179 | file->f_path.dentry->d_name.name, | |
180 | (unsigned long long)datasync); | |
ccd979bd | 181 | |
a987c7ca YL |
182 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
183 | return -EROFS; | |
184 | ||
3b49c9a1 | 185 | err = file_write_and_wait_range(file, start, end); |
02c24a82 JB |
186 | if (err) |
187 | return err; | |
188 | ||
2931cdcb DW |
189 | commit_tid = datasync ? oi->i_datasync_tid : oi->i_sync_tid; |
190 | if (journal->j_flags & JBD2_BARRIER && | |
191 | !jbd2_trans_will_send_data_barrier(journal, commit_tid)) | |
192 | needs_barrier = true; | |
193 | err = jbd2_complete_transaction(journal, commit_tid); | |
194 | if (needs_barrier) { | |
c6bf3f0e | 195 | ret = blkdev_issue_flush(inode->i_sb->s_bdev); |
2931cdcb DW |
196 | if (!err) |
197 | err = ret; | |
04eda1a1 | 198 | } |
e04cc15f | 199 | |
c1e8d35e TM |
200 | if (err) |
201 | mlog_errno(err); | |
ccd979bd MF |
202 | |
203 | return (err < 0) ? -EIO : 0; | |
204 | } | |
205 | ||
7f1a37e3 TY |
206 | int ocfs2_should_update_atime(struct inode *inode, |
207 | struct vfsmount *vfsmnt) | |
208 | { | |
95582b00 | 209 | struct timespec64 now; |
7f1a37e3 TY |
210 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
211 | ||
212 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
213 | return 0; | |
214 | ||
215 | if ((inode->i_flags & S_NOATIME) || | |
1751e8a6 | 216 | ((inode->i_sb->s_flags & SB_NODIRATIME) && S_ISDIR(inode->i_mode))) |
7f1a37e3 TY |
217 | return 0; |
218 | ||
6c2aad05 MF |
219 | /* |
220 | * We can be called with no vfsmnt structure - NFSD will | |
221 | * sometimes do this. | |
222 | * | |
223 | * Note that our action here is different than touch_atime() - | |
224 | * if we can't tell whether this is a noatime mount, then we | |
225 | * don't know whether to trust the value of s_atime_quantum. | |
226 | */ | |
227 | if (vfsmnt == NULL) | |
228 | return 0; | |
229 | ||
7f1a37e3 TY |
230 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
231 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
232 | return 0; | |
233 | ||
7e913c53 | 234 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
95582b00 DD |
235 | if ((timespec64_compare(&inode->i_atime, &inode->i_mtime) <= 0) || |
236 | (timespec64_compare(&inode->i_atime, &inode->i_ctime) <= 0)) | |
7e913c53 MF |
237 | return 1; |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
078cd827 | 242 | now = current_time(inode); |
7f1a37e3 TY |
243 | if ((now.tv_sec - inode->i_atime.tv_sec <= osb->s_atime_quantum)) |
244 | return 0; | |
245 | else | |
246 | return 1; | |
247 | } | |
248 | ||
249 | int ocfs2_update_inode_atime(struct inode *inode, | |
250 | struct buffer_head *bh) | |
251 | { | |
252 | int ret; | |
253 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
254 | handle_t *handle; | |
c11e9faf | 255 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
7f1a37e3 | 256 | |
7f1a37e3 | 257 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
258 | if (IS_ERR(handle)) { |
259 | ret = PTR_ERR(handle); | |
7f1a37e3 TY |
260 | mlog_errno(ret); |
261 | goto out; | |
262 | } | |
263 | ||
0cf2f763 | 264 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 265 | OCFS2_JOURNAL_ACCESS_WRITE); |
c11e9faf MF |
266 | if (ret) { |
267 | mlog_errno(ret); | |
268 | goto out_commit; | |
269 | } | |
270 | ||
271 | /* | |
272 | * Don't use ocfs2_mark_inode_dirty() here as we don't always | |
273 | * have i_mutex to guard against concurrent changes to other | |
274 | * inode fields. | |
275 | */ | |
078cd827 | 276 | inode->i_atime = current_time(inode); |
c11e9faf MF |
277 | di->i_atime = cpu_to_le64(inode->i_atime.tv_sec); |
278 | di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); | |
6fdb702d | 279 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
ec20cec7 | 280 | ocfs2_journal_dirty(handle, bh); |
7f1a37e3 | 281 | |
c11e9faf | 282 | out_commit: |
1119d3c0 | 283 | ocfs2_commit_trans(osb, handle); |
7f1a37e3 | 284 | out: |
7f1a37e3 TY |
285 | return ret; |
286 | } | |
287 | ||
026749a8 | 288 | int ocfs2_set_inode_size(handle_t *handle, |
6cb129f5 AB |
289 | struct inode *inode, |
290 | struct buffer_head *fe_bh, | |
291 | u64 new_i_size) | |
ccd979bd MF |
292 | { |
293 | int status; | |
294 | ||
ccd979bd | 295 | i_size_write(inode, new_i_size); |
8110b073 | 296 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
078cd827 | 297 | inode->i_ctime = inode->i_mtime = current_time(inode); |
ccd979bd MF |
298 | |
299 | status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); | |
300 | if (status < 0) { | |
301 | mlog_errno(status); | |
302 | goto bail; | |
303 | } | |
304 | ||
305 | bail: | |
ccd979bd MF |
306 | return status; |
307 | } | |
308 | ||
9e33d69f JK |
309 | int ocfs2_simple_size_update(struct inode *inode, |
310 | struct buffer_head *di_bh, | |
311 | u64 new_i_size) | |
ccd979bd MF |
312 | { |
313 | int ret; | |
314 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 315 | handle_t *handle = NULL; |
ccd979bd | 316 | |
65eff9cc | 317 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
318 | if (IS_ERR(handle)) { |
319 | ret = PTR_ERR(handle); | |
ccd979bd MF |
320 | mlog_errno(ret); |
321 | goto out; | |
322 | } | |
323 | ||
324 | ret = ocfs2_set_inode_size(handle, inode, di_bh, | |
325 | new_i_size); | |
326 | if (ret < 0) | |
327 | mlog_errno(ret); | |
328 | ||
6fdb702d | 329 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
02dc1af4 | 330 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
331 | out: |
332 | return ret; | |
333 | } | |
334 | ||
37f8a2bf TM |
335 | static int ocfs2_cow_file_pos(struct inode *inode, |
336 | struct buffer_head *fe_bh, | |
337 | u64 offset) | |
338 | { | |
339 | int status; | |
340 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
341 | unsigned int num_clusters = 0; | |
342 | unsigned int ext_flags = 0; | |
343 | ||
344 | /* | |
345 | * If the new offset is aligned to the range of the cluster, there is | |
346 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to | |
347 | * CoW either. | |
348 | */ | |
349 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) | |
350 | return 0; | |
351 | ||
352 | status = ocfs2_get_clusters(inode, cpos, &phys, | |
353 | &num_clusters, &ext_flags); | |
354 | if (status) { | |
355 | mlog_errno(status); | |
356 | goto out; | |
357 | } | |
358 | ||
359 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
360 | goto out; | |
361 | ||
c7dd3392 | 362 | return ocfs2_refcount_cow(inode, fe_bh, cpos, 1, cpos+1); |
37f8a2bf TM |
363 | |
364 | out: | |
365 | return status; | |
366 | } | |
367 | ||
ccd979bd MF |
368 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
369 | struct inode *inode, | |
370 | struct buffer_head *fe_bh, | |
371 | u64 new_i_size) | |
372 | { | |
373 | int status; | |
1fabe148 | 374 | handle_t *handle; |
60b11392 | 375 | struct ocfs2_dinode *di; |
35edec1d | 376 | u64 cluster_bytes; |
ccd979bd | 377 | |
37f8a2bf TM |
378 | /* |
379 | * We need to CoW the cluster contains the offset if it is reflinked | |
380 | * since we will call ocfs2_zero_range_for_truncate later which will | |
381 | * write "0" from offset to the end of the cluster. | |
382 | */ | |
383 | status = ocfs2_cow_file_pos(inode, fe_bh, new_i_size); | |
384 | if (status) { | |
385 | mlog_errno(status); | |
386 | return status; | |
387 | } | |
388 | ||
ccd979bd MF |
389 | /* TODO: This needs to actually orphan the inode in this |
390 | * transaction. */ | |
391 | ||
65eff9cc | 392 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ccd979bd MF |
393 | if (IS_ERR(handle)) { |
394 | status = PTR_ERR(handle); | |
395 | mlog_errno(status); | |
396 | goto out; | |
397 | } | |
398 | ||
0cf2f763 | 399 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh, |
13723d00 | 400 | OCFS2_JOURNAL_ACCESS_WRITE); |
60b11392 MF |
401 | if (status < 0) { |
402 | mlog_errno(status); | |
403 | goto out_commit; | |
404 | } | |
405 | ||
406 | /* | |
407 | * Do this before setting i_size. | |
408 | */ | |
35edec1d MF |
409 | cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size); |
410 | status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size, | |
411 | cluster_bytes); | |
60b11392 MF |
412 | if (status) { |
413 | mlog_errno(status); | |
414 | goto out_commit; | |
415 | } | |
416 | ||
417 | i_size_write(inode, new_i_size); | |
078cd827 | 418 | inode->i_ctime = inode->i_mtime = current_time(inode); |
60b11392 MF |
419 | |
420 | di = (struct ocfs2_dinode *) fe_bh->b_data; | |
421 | di->i_size = cpu_to_le64(new_i_size); | |
422 | di->i_ctime = di->i_mtime = cpu_to_le64(inode->i_ctime.tv_sec); | |
423 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
6fdb702d | 424 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
60b11392 | 425 | |
ec20cec7 | 426 | ocfs2_journal_dirty(handle, fe_bh); |
ccd979bd | 427 | |
60b11392 | 428 | out_commit: |
02dc1af4 | 429 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 430 | out: |
ccd979bd MF |
431 | return status; |
432 | } | |
433 | ||
026749a8 | 434 | int ocfs2_truncate_file(struct inode *inode, |
ccd979bd MF |
435 | struct buffer_head *di_bh, |
436 | u64 new_i_size) | |
437 | { | |
438 | int status = 0; | |
439 | struct ocfs2_dinode *fe = NULL; | |
440 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
ccd979bd | 441 | |
b657c95c JB |
442 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
443 | * already validated it */ | |
ccd979bd | 444 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
ccd979bd | 445 | |
468eedde TM |
446 | trace_ocfs2_truncate_file((unsigned long long)OCFS2_I(inode)->ip_blkno, |
447 | (unsigned long long)le64_to_cpu(fe->i_size), | |
448 | (unsigned long long)new_i_size); | |
449 | ||
ccd979bd | 450 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), |
b0697053 MF |
451 | "Inode %llu, inode i_size = %lld != di " |
452 | "i_size = %llu, i_flags = 0x%x\n", | |
453 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ccd979bd | 454 | i_size_read(inode), |
b0697053 MF |
455 | (unsigned long long)le64_to_cpu(fe->i_size), |
456 | le32_to_cpu(fe->i_flags)); | |
ccd979bd MF |
457 | |
458 | if (new_i_size > le64_to_cpu(fe->i_size)) { | |
468eedde TM |
459 | trace_ocfs2_truncate_file_error( |
460 | (unsigned long long)le64_to_cpu(fe->i_size), | |
461 | (unsigned long long)new_i_size); | |
ccd979bd MF |
462 | status = -EINVAL; |
463 | mlog_errno(status); | |
464 | goto bail; | |
465 | } | |
466 | ||
2e89b2e4 MF |
467 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
468 | ||
4fe370af MF |
469 | ocfs2_resv_discard(&osb->osb_la_resmap, |
470 | &OCFS2_I(inode)->ip_la_data_resv); | |
471 | ||
c934a92d MF |
472 | /* |
473 | * The inode lock forced other nodes to sync and drop their | |
474 | * pages, which (correctly) happens even if we have a truncate | |
475 | * without allocation change - ocfs2 cluster sizes can be much | |
476 | * greater than page size, so we have to truncate them | |
477 | * anyway. | |
478 | */ | |
2e89b2e4 MF |
479 | unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1); |
480 | truncate_inode_pages(inode->i_mapping, new_i_size); | |
481 | ||
1afc32b9 MF |
482 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
483 | status = ocfs2_truncate_inline(inode, di_bh, new_i_size, | |
b1967d0e | 484 | i_size_read(inode), 1); |
1afc32b9 MF |
485 | if (status) |
486 | mlog_errno(status); | |
487 | ||
c934a92d | 488 | goto bail_unlock_sem; |
1afc32b9 MF |
489 | } |
490 | ||
ccd979bd MF |
491 | /* alright, we're going to need to do a full blown alloc size |
492 | * change. Orphan the inode so that recovery can complete the | |
493 | * truncate if necessary. This does the task of marking | |
494 | * i_size. */ | |
495 | status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size); | |
496 | if (status < 0) { | |
497 | mlog_errno(status); | |
c934a92d | 498 | goto bail_unlock_sem; |
ccd979bd MF |
499 | } |
500 | ||
78f94673 | 501 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
ccd979bd MF |
502 | if (status < 0) { |
503 | mlog_errno(status); | |
c934a92d | 504 | goto bail_unlock_sem; |
ccd979bd MF |
505 | } |
506 | ||
507 | /* TODO: orphan dir cleanup here. */ | |
c934a92d | 508 | bail_unlock_sem: |
2e89b2e4 MF |
509 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
510 | ||
ccd979bd | 511 | bail: |
8b2c0dba TM |
512 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
513 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
ccd979bd | 514 | |
ccd979bd MF |
515 | return status; |
516 | } | |
517 | ||
518 | /* | |
0eb8d47e | 519 | * extend file allocation only here. |
ccd979bd MF |
520 | * we'll update all the disk stuff, and oip->alloc_size |
521 | * | |
522 | * expect stuff to be locked, a transaction started and enough data / | |
523 | * metadata reservations in the contexts. | |
524 | * | |
525 | * Will return -EAGAIN, and a reason if a restart is needed. | |
526 | * If passed in, *reason will always be set, even in error. | |
527 | */ | |
0eb8d47e TM |
528 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
529 | struct inode *inode, | |
530 | u32 *logical_offset, | |
531 | u32 clusters_to_add, | |
532 | int mark_unwritten, | |
533 | struct buffer_head *fe_bh, | |
534 | handle_t *handle, | |
535 | struct ocfs2_alloc_context *data_ac, | |
536 | struct ocfs2_alloc_context *meta_ac, | |
537 | enum ocfs2_alloc_restarted *reason_ret) | |
ccd979bd | 538 | { |
f99b9b7c JB |
539 | int ret; |
540 | struct ocfs2_extent_tree et; | |
ccd979bd | 541 | |
5e404e9e | 542 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), fe_bh); |
cbee7e1a JB |
543 | ret = ocfs2_add_clusters_in_btree(handle, &et, logical_offset, |
544 | clusters_to_add, mark_unwritten, | |
545 | data_ac, meta_ac, reason_ret); | |
f99b9b7c JB |
546 | |
547 | return ret; | |
ccd979bd MF |
548 | } |
549 | ||
5bc55d65 JG |
550 | static int ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
551 | u32 clusters_to_add, int mark_unwritten) | |
ccd979bd MF |
552 | { |
553 | int status = 0; | |
554 | int restart_func = 0; | |
abf8b156 | 555 | int credits; |
2ae99a60 | 556 | u32 prev_clusters; |
ccd979bd MF |
557 | struct buffer_head *bh = NULL; |
558 | struct ocfs2_dinode *fe = NULL; | |
1fabe148 | 559 | handle_t *handle = NULL; |
ccd979bd MF |
560 | struct ocfs2_alloc_context *data_ac = NULL; |
561 | struct ocfs2_alloc_context *meta_ac = NULL; | |
696cdf73 | 562 | enum ocfs2_alloc_restarted why = RESTART_NONE; |
ccd979bd | 563 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 564 | struct ocfs2_extent_tree et; |
a90714c1 | 565 | int did_quota = 0; |
ccd979bd | 566 | |
dcd0538f | 567 | /* |
f0cb0f0b | 568 | * Unwritten extent only exists for file systems which |
dcd0538f MF |
569 | * support holes. |
570 | */ | |
2ae99a60 | 571 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
dcd0538f | 572 | |
b657c95c | 573 | status = ocfs2_read_inode_block(inode, &bh); |
ccd979bd MF |
574 | if (status < 0) { |
575 | mlog_errno(status); | |
576 | goto leave; | |
577 | } | |
ccd979bd | 578 | fe = (struct ocfs2_dinode *) bh->b_data; |
ccd979bd MF |
579 | |
580 | restart_all: | |
581 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); | |
582 | ||
5e404e9e | 583 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), bh); |
f99b9b7c JB |
584 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
585 | &data_ac, &meta_ac); | |
9517bac6 MF |
586 | if (status) { |
587 | mlog_errno(status); | |
588 | goto leave; | |
589 | } | |
590 | ||
06f9da6e | 591 | credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list); |
65eff9cc | 592 | handle = ocfs2_start_trans(osb, credits); |
ccd979bd MF |
593 | if (IS_ERR(handle)) { |
594 | status = PTR_ERR(handle); | |
595 | handle = NULL; | |
596 | mlog_errno(status); | |
597 | goto leave; | |
598 | } | |
599 | ||
600 | restarted_transaction: | |
468eedde TM |
601 | trace_ocfs2_extend_allocation( |
602 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
603 | (unsigned long long)i_size_read(inode), | |
604 | le32_to_cpu(fe->i_clusters), clusters_to_add, | |
605 | why, restart_func); | |
606 | ||
5dd4056d CH |
607 | status = dquot_alloc_space_nodirty(inode, |
608 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); | |
609 | if (status) | |
a90714c1 | 610 | goto leave; |
a90714c1 JK |
611 | did_quota = 1; |
612 | ||
ccd979bd MF |
613 | /* reserve a write to the file entry early on - that we if we |
614 | * run out of credits in the allocation path, we can still | |
615 | * update i_size. */ | |
0cf2f763 | 616 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 617 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
618 | if (status < 0) { |
619 | mlog_errno(status); | |
620 | goto leave; | |
621 | } | |
622 | ||
623 | prev_clusters = OCFS2_I(inode)->ip_clusters; | |
624 | ||
0eb8d47e TM |
625 | status = ocfs2_add_inode_data(osb, |
626 | inode, | |
627 | &logical_start, | |
628 | clusters_to_add, | |
629 | mark_unwritten, | |
630 | bh, | |
631 | handle, | |
632 | data_ac, | |
633 | meta_ac, | |
634 | &why); | |
ccd979bd MF |
635 | if ((status < 0) && (status != -EAGAIN)) { |
636 | if (status != -ENOSPC) | |
637 | mlog_errno(status); | |
638 | goto leave; | |
639 | } | |
2931cdcb | 640 | ocfs2_update_inode_fsync_trans(handle, inode, 1); |
ec20cec7 | 641 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
642 | |
643 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
644 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); | |
645 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
a90714c1 | 646 | /* Release unused quota reservation */ |
5dd4056d | 647 | dquot_free_space(inode, |
a90714c1 JK |
648 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
649 | did_quota = 0; | |
ccd979bd MF |
650 | |
651 | if (why != RESTART_NONE && clusters_to_add) { | |
652 | if (why == RESTART_META) { | |
ccd979bd | 653 | restart_func = 1; |
79681842 | 654 | status = 0; |
ccd979bd MF |
655 | } else { |
656 | BUG_ON(why != RESTART_TRANS); | |
657 | ||
2b1e55c3 | 658 | status = ocfs2_allocate_extend_trans(handle, 1); |
ccd979bd MF |
659 | if (status < 0) { |
660 | /* handle still has to be committed at | |
661 | * this point. */ | |
662 | status = -ENOMEM; | |
663 | mlog_errno(status); | |
664 | goto leave; | |
665 | } | |
666 | goto restarted_transaction; | |
667 | } | |
668 | } | |
669 | ||
468eedde | 670 | trace_ocfs2_extend_allocation_end(OCFS2_I(inode)->ip_blkno, |
1ca1a111 | 671 | le32_to_cpu(fe->i_clusters), |
468eedde TM |
672 | (unsigned long long)le64_to_cpu(fe->i_size), |
673 | OCFS2_I(inode)->ip_clusters, | |
674 | (unsigned long long)i_size_read(inode)); | |
ccd979bd MF |
675 | |
676 | leave: | |
a90714c1 | 677 | if (status < 0 && did_quota) |
5dd4056d | 678 | dquot_free_space(inode, |
a90714c1 | 679 | ocfs2_clusters_to_bytes(osb->sb, clusters_to_add)); |
ccd979bd | 680 | if (handle) { |
02dc1af4 | 681 | ocfs2_commit_trans(osb, handle); |
ccd979bd MF |
682 | handle = NULL; |
683 | } | |
684 | if (data_ac) { | |
685 | ocfs2_free_alloc_context(data_ac); | |
686 | data_ac = NULL; | |
687 | } | |
688 | if (meta_ac) { | |
689 | ocfs2_free_alloc_context(meta_ac); | |
690 | meta_ac = NULL; | |
691 | } | |
692 | if ((!status) && restart_func) { | |
693 | restart_func = 0; | |
694 | goto restart_all; | |
695 | } | |
a81cb88b MF |
696 | brelse(bh); |
697 | bh = NULL; | |
ccd979bd | 698 | |
ccd979bd MF |
699 | return status; |
700 | } | |
701 | ||
a4bfb4cf JB |
702 | /* |
703 | * While a write will already be ordering the data, a truncate will not. | |
704 | * Thus, we need to explicitly order the zeroed pages. | |
705 | */ | |
c7d2cbc3 | 706 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode, |
bbd0f327 JQ |
707 | struct buffer_head *di_bh, |
708 | loff_t start_byte, | |
709 | loff_t length) | |
a4bfb4cf JB |
710 | { |
711 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
712 | handle_t *handle = NULL; | |
713 | int ret = 0; | |
714 | ||
715 | if (!ocfs2_should_order_data(inode)) | |
716 | goto out; | |
717 | ||
718 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
719 | if (IS_ERR(handle)) { | |
720 | ret = -ENOMEM; | |
721 | mlog_errno(ret); | |
722 | goto out; | |
723 | } | |
724 | ||
bbd0f327 | 725 | ret = ocfs2_jbd2_inode_add_write(handle, inode, start_byte, length); |
c7d2cbc3 JB |
726 | if (ret < 0) { |
727 | mlog_errno(ret); | |
728 | goto out; | |
729 | } | |
730 | ||
731 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, | |
732 | OCFS2_JOURNAL_ACCESS_WRITE); | |
733 | if (ret) | |
a4bfb4cf | 734 | mlog_errno(ret); |
6fdb702d | 735 | ocfs2_update_inode_fsync_trans(handle, inode, 1); |
a4bfb4cf JB |
736 | |
737 | out: | |
738 | if (ret) { | |
739 | if (!IS_ERR(handle)) | |
740 | ocfs2_commit_trans(osb, handle); | |
741 | handle = ERR_PTR(ret); | |
742 | } | |
743 | return handle; | |
744 | } | |
745 | ||
ccd979bd MF |
746 | /* Some parts of this taken from generic_cont_expand, which turned out |
747 | * to be too fragile to do exactly what we need without us having to | |
4e02ed4b | 748 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
a4bfb4cf | 749 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
c7d2cbc3 | 750 | u64 abs_to, struct buffer_head *di_bh) |
ccd979bd MF |
751 | { |
752 | struct address_space *mapping = inode->i_mapping; | |
753 | struct page *page; | |
09cbfeaf | 754 | unsigned long index = abs_from >> PAGE_SHIFT; |
f775da2f | 755 | handle_t *handle; |
5453258d | 756 | int ret = 0; |
a4bfb4cf | 757 | unsigned zero_from, zero_to, block_start, block_end; |
c7d2cbc3 | 758 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
ccd979bd | 759 | |
a4bfb4cf | 760 | BUG_ON(abs_from >= abs_to); |
09cbfeaf | 761 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_SHIFT)); |
a4bfb4cf | 762 | BUG_ON(abs_from & (inode->i_blkbits - 1)); |
ccd979bd | 763 | |
bbd0f327 JQ |
764 | handle = ocfs2_zero_start_ordered_transaction(inode, di_bh, |
765 | abs_from, | |
766 | abs_to - abs_from); | |
f775da2f JB |
767 | if (IS_ERR(handle)) { |
768 | ret = PTR_ERR(handle); | |
769 | goto out; | |
770 | } | |
771 | ||
9b4c0ff3 | 772 | page = find_or_create_page(mapping, index, GFP_NOFS); |
ccd979bd MF |
773 | if (!page) { |
774 | ret = -ENOMEM; | |
775 | mlog_errno(ret); | |
f775da2f | 776 | goto out_commit_trans; |
ccd979bd MF |
777 | } |
778 | ||
a4bfb4cf | 779 | /* Get the offsets within the page that we want to zero */ |
09cbfeaf KS |
780 | zero_from = abs_from & (PAGE_SIZE - 1); |
781 | zero_to = abs_to & (PAGE_SIZE - 1); | |
a4bfb4cf | 782 | if (!zero_to) |
09cbfeaf | 783 | zero_to = PAGE_SIZE; |
ccd979bd | 784 | |
468eedde TM |
785 | trace_ocfs2_write_zero_page( |
786 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
787 | (unsigned long long)abs_from, | |
788 | (unsigned long long)abs_to, | |
789 | index, zero_from, zero_to); | |
5693486b | 790 | |
a4bfb4cf JB |
791 | /* We know that zero_from is block aligned */ |
792 | for (block_start = zero_from; block_start < zero_to; | |
793 | block_start = block_end) { | |
93407472 | 794 | block_end = block_start + i_blocksize(inode); |
a4bfb4cf JB |
795 | |
796 | /* | |
ebdec241 CH |
797 | * block_start is block-aligned. Bump it by one to force |
798 | * __block_write_begin and block_commit_write to zero the | |
a4bfb4cf JB |
799 | * whole block. |
800 | */ | |
ebdec241 CH |
801 | ret = __block_write_begin(page, block_start + 1, 0, |
802 | ocfs2_get_block); | |
a4bfb4cf JB |
803 | if (ret < 0) { |
804 | mlog_errno(ret); | |
ccd979bd MF |
805 | goto out_unlock; |
806 | } | |
ccd979bd | 807 | |
a4bfb4cf JB |
808 | |
809 | /* must not update i_size! */ | |
810 | ret = block_commit_write(page, block_start + 1, | |
811 | block_start + 1); | |
812 | if (ret < 0) | |
813 | mlog_errno(ret); | |
814 | else | |
815 | ret = 0; | |
816 | } | |
ccd979bd | 817 | |
f775da2f JB |
818 | /* |
819 | * fs-writeback will release the dirty pages without page lock | |
820 | * whose offset are over inode size, the release happens at | |
821 | * block_write_full_page(). | |
822 | */ | |
823 | i_size_write(inode, abs_to); | |
824 | inode->i_blocks = ocfs2_inode_sector_count(inode); | |
825 | di->i_size = cpu_to_le64((u64)i_size_read(inode)); | |
078cd827 | 826 | inode->i_mtime = inode->i_ctime = current_time(inode); |
f775da2f JB |
827 | di->i_mtime = di->i_ctime = cpu_to_le64(inode->i_mtime.tv_sec); |
828 | di->i_ctime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); | |
829 | di->i_mtime_nsec = di->i_ctime_nsec; | |
c7d2cbc3 | 830 | if (handle) { |
c7d2cbc3 | 831 | ocfs2_journal_dirty(handle, di_bh); |
6fdb702d | 832 | ocfs2_update_inode_fsync_trans(handle, inode, 1); |
c7d2cbc3 | 833 | } |
a4bfb4cf | 834 | |
ccd979bd MF |
835 | out_unlock: |
836 | unlock_page(page); | |
09cbfeaf | 837 | put_page(page); |
f775da2f JB |
838 | out_commit_trans: |
839 | if (handle) | |
840 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
ccd979bd MF |
841 | out: |
842 | return ret; | |
843 | } | |
844 | ||
5693486b JB |
845 | /* |
846 | * Find the next range to zero. We do this in terms of bytes because | |
847 | * that's what ocfs2_zero_extend() wants, and it is dealing with the | |
848 | * pagecache. We may return multiple extents. | |
849 | * | |
850 | * zero_start and zero_end are ocfs2_zero_extend()s current idea of what | |
851 | * needs to be zeroed. range_start and range_end return the next zeroing | |
852 | * range. A subsequent call should pass the previous range_end as its | |
853 | * zero_start. If range_end is 0, there's nothing to do. | |
854 | * | |
855 | * Unwritten extents are skipped over. Refcounted extents are CoWd. | |
856 | */ | |
857 | static int ocfs2_zero_extend_get_range(struct inode *inode, | |
858 | struct buffer_head *di_bh, | |
859 | u64 zero_start, u64 zero_end, | |
860 | u64 *range_start, u64 *range_end) | |
ccd979bd | 861 | { |
5693486b JB |
862 | int rc = 0, needs_cow = 0; |
863 | u32 p_cpos, zero_clusters = 0; | |
864 | u32 zero_cpos = | |
865 | zero_start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
866 | u32 last_cpos = ocfs2_clusters_for_bytes(inode->i_sb, zero_end); | |
867 | unsigned int num_clusters = 0; | |
868 | unsigned int ext_flags = 0; | |
ccd979bd | 869 | |
5693486b JB |
870 | while (zero_cpos < last_cpos) { |
871 | rc = ocfs2_get_clusters(inode, zero_cpos, &p_cpos, | |
872 | &num_clusters, &ext_flags); | |
873 | if (rc) { | |
874 | mlog_errno(rc); | |
ccd979bd MF |
875 | goto out; |
876 | } | |
877 | ||
5693486b JB |
878 | if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) { |
879 | zero_clusters = num_clusters; | |
880 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
881 | needs_cow = 1; | |
882 | break; | |
883 | } | |
884 | ||
885 | zero_cpos += num_clusters; | |
886 | } | |
887 | if (!zero_clusters) { | |
888 | *range_end = 0; | |
889 | goto out; | |
890 | } | |
891 | ||
892 | while ((zero_cpos + zero_clusters) < last_cpos) { | |
893 | rc = ocfs2_get_clusters(inode, zero_cpos + zero_clusters, | |
894 | &p_cpos, &num_clusters, | |
895 | &ext_flags); | |
896 | if (rc) { | |
897 | mlog_errno(rc); | |
898 | goto out; | |
899 | } | |
900 | ||
901 | if (!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN)) | |
902 | break; | |
903 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
904 | needs_cow = 1; | |
905 | zero_clusters += num_clusters; | |
906 | } | |
907 | if ((zero_cpos + zero_clusters) > last_cpos) | |
908 | zero_clusters = last_cpos - zero_cpos; | |
909 | ||
910 | if (needs_cow) { | |
c7dd3392 | 911 | rc = ocfs2_refcount_cow(inode, di_bh, zero_cpos, |
15502712 | 912 | zero_clusters, UINT_MAX); |
5693486b JB |
913 | if (rc) { |
914 | mlog_errno(rc); | |
915 | goto out; | |
916 | } | |
917 | } | |
918 | ||
919 | *range_start = ocfs2_clusters_to_bytes(inode->i_sb, zero_cpos); | |
920 | *range_end = ocfs2_clusters_to_bytes(inode->i_sb, | |
921 | zero_cpos + zero_clusters); | |
922 | ||
923 | out: | |
924 | return rc; | |
925 | } | |
926 | ||
927 | /* | |
928 | * Zero one range returned from ocfs2_zero_extend_get_range(). The caller | |
929 | * has made sure that the entire range needs zeroing. | |
930 | */ | |
931 | static int ocfs2_zero_extend_range(struct inode *inode, u64 range_start, | |
c7d2cbc3 | 932 | u64 range_end, struct buffer_head *di_bh) |
5693486b JB |
933 | { |
934 | int rc = 0; | |
935 | u64 next_pos; | |
936 | u64 zero_pos = range_start; | |
937 | ||
468eedde TM |
938 | trace_ocfs2_zero_extend_range( |
939 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
940 | (unsigned long long)range_start, | |
941 | (unsigned long long)range_end); | |
5693486b JB |
942 | BUG_ON(range_start >= range_end); |
943 | ||
944 | while (zero_pos < range_end) { | |
09cbfeaf | 945 | next_pos = (zero_pos & PAGE_MASK) + PAGE_SIZE; |
5693486b JB |
946 | if (next_pos > range_end) |
947 | next_pos = range_end; | |
c7d2cbc3 | 948 | rc = ocfs2_write_zero_page(inode, zero_pos, next_pos, di_bh); |
5693486b JB |
949 | if (rc < 0) { |
950 | mlog_errno(rc); | |
951 | break; | |
952 | } | |
953 | zero_pos = next_pos; | |
e2057c5a MF |
954 | |
955 | /* | |
956 | * Very large extends have the potential to lock up | |
957 | * the cpu for extended periods of time. | |
958 | */ | |
959 | cond_resched(); | |
ccd979bd MF |
960 | } |
961 | ||
5693486b JB |
962 | return rc; |
963 | } | |
964 | ||
965 | int ocfs2_zero_extend(struct inode *inode, struct buffer_head *di_bh, | |
966 | loff_t zero_to_size) | |
967 | { | |
968 | int ret = 0; | |
969 | u64 zero_start, range_start = 0, range_end = 0; | |
970 | struct super_block *sb = inode->i_sb; | |
971 | ||
972 | zero_start = ocfs2_align_bytes_to_blocks(sb, i_size_read(inode)); | |
468eedde TM |
973 | trace_ocfs2_zero_extend((unsigned long long)OCFS2_I(inode)->ip_blkno, |
974 | (unsigned long long)zero_start, | |
975 | (unsigned long long)i_size_read(inode)); | |
5693486b JB |
976 | while (zero_start < zero_to_size) { |
977 | ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start, | |
978 | zero_to_size, | |
979 | &range_start, | |
980 | &range_end); | |
981 | if (ret) { | |
982 | mlog_errno(ret); | |
983 | break; | |
984 | } | |
985 | if (!range_end) | |
986 | break; | |
987 | /* Trim the ends */ | |
988 | if (range_start < zero_start) | |
989 | range_start = zero_start; | |
990 | if (range_end > zero_to_size) | |
991 | range_end = zero_to_size; | |
992 | ||
993 | ret = ocfs2_zero_extend_range(inode, range_start, | |
c7d2cbc3 | 994 | range_end, di_bh); |
5693486b JB |
995 | if (ret) { |
996 | mlog_errno(ret); | |
997 | break; | |
998 | } | |
999 | zero_start = range_end; | |
1000 | } | |
1001 | ||
ccd979bd MF |
1002 | return ret; |
1003 | } | |
1004 | ||
5693486b JB |
1005 | int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh, |
1006 | u64 new_i_size, u64 zero_to) | |
65ed39d6 MF |
1007 | { |
1008 | int ret; | |
1009 | u32 clusters_to_add; | |
1010 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1011 | ||
5693486b JB |
1012 | /* |
1013 | * Only quota files call this without a bh, and they can't be | |
1014 | * refcounted. | |
1015 | */ | |
84e40080 | 1016 | BUG_ON(!di_bh && ocfs2_is_refcount_inode(inode)); |
5693486b JB |
1017 | BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE)); |
1018 | ||
65ed39d6 MF |
1019 | clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size); |
1020 | if (clusters_to_add < oi->ip_clusters) | |
1021 | clusters_to_add = 0; | |
1022 | else | |
1023 | clusters_to_add -= oi->ip_clusters; | |
1024 | ||
1025 | if (clusters_to_add) { | |
5bc55d65 JG |
1026 | ret = ocfs2_extend_allocation(inode, oi->ip_clusters, |
1027 | clusters_to_add, 0); | |
65ed39d6 MF |
1028 | if (ret) { |
1029 | mlog_errno(ret); | |
1030 | goto out; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | * Call this even if we don't add any clusters to the tree. We | |
1036 | * still need to zero the area between the old i_size and the | |
1037 | * new i_size. | |
1038 | */ | |
5693486b | 1039 | ret = ocfs2_zero_extend(inode, di_bh, zero_to); |
65ed39d6 MF |
1040 | if (ret < 0) |
1041 | mlog_errno(ret); | |
1042 | ||
1043 | out: | |
1044 | return ret; | |
1045 | } | |
1046 | ||
ccd979bd MF |
1047 | static int ocfs2_extend_file(struct inode *inode, |
1048 | struct buffer_head *di_bh, | |
65ed39d6 | 1049 | u64 new_i_size) |
ccd979bd | 1050 | { |
c934a92d | 1051 | int ret = 0; |
1afc32b9 | 1052 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
ccd979bd | 1053 | |
65ed39d6 | 1054 | BUG_ON(!di_bh); |
53013cba | 1055 | |
ccd979bd MF |
1056 | /* setattr sometimes calls us like this. */ |
1057 | if (new_i_size == 0) | |
1058 | goto out; | |
1059 | ||
1060 | if (i_size_read(inode) == new_i_size) | |
5693486b | 1061 | goto out; |
ccd979bd MF |
1062 | BUG_ON(new_i_size < i_size_read(inode)); |
1063 | ||
0effef77 | 1064 | /* |
65ed39d6 MF |
1065 | * The alloc sem blocks people in read/write from reading our |
1066 | * allocation until we're done changing it. We depend on | |
1067 | * i_mutex to block other extend/truncate calls while we're | |
5693486b JB |
1068 | * here. We even have to hold it for sparse files because there |
1069 | * might be some tail zeroing. | |
0effef77 | 1070 | */ |
1afc32b9 MF |
1071 | down_write(&oi->ip_alloc_sem); |
1072 | ||
1073 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1074 | /* | |
1075 | * We can optimize small extends by keeping the inodes | |
1076 | * inline data. | |
1077 | */ | |
1078 | if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) { | |
1079 | up_write(&oi->ip_alloc_sem); | |
1080 | goto out_update_size; | |
1081 | } | |
1082 | ||
1083 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1084 | if (ret) { | |
1085 | up_write(&oi->ip_alloc_sem); | |
1afc32b9 | 1086 | mlog_errno(ret); |
c934a92d | 1087 | goto out; |
1afc32b9 MF |
1088 | } |
1089 | } | |
1090 | ||
5693486b JB |
1091 | if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
1092 | ret = ocfs2_zero_extend(inode, di_bh, new_i_size); | |
1093 | else | |
1094 | ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size, | |
1095 | new_i_size); | |
1afc32b9 MF |
1096 | |
1097 | up_write(&oi->ip_alloc_sem); | |
65ed39d6 | 1098 | |
0effef77 MF |
1099 | if (ret < 0) { |
1100 | mlog_errno(ret); | |
c934a92d | 1101 | goto out; |
53013cba MF |
1102 | } |
1103 | ||
3a0782d0 | 1104 | out_update_size: |
65ed39d6 MF |
1105 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
1106 | if (ret < 0) | |
1107 | mlog_errno(ret); | |
ccd979bd MF |
1108 | |
1109 | out: | |
1110 | return ret; | |
1111 | } | |
1112 | ||
549c7297 CB |
1113 | int ocfs2_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, |
1114 | struct iattr *attr) | |
ccd979bd MF |
1115 | { |
1116 | int status = 0, size_change; | |
3d46a44a | 1117 | int inode_locked = 0; |
2b0143b5 | 1118 | struct inode *inode = d_inode(dentry); |
ccd979bd MF |
1119 | struct super_block *sb = inode->i_sb; |
1120 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
1121 | struct buffer_head *bh = NULL; | |
1fabe148 | 1122 | handle_t *handle = NULL; |
65bac575 | 1123 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
52a9ee28 | 1124 | int qtype; |
b891fa50 ER |
1125 | int had_lock; |
1126 | struct ocfs2_lock_holder oh; | |
ccd979bd | 1127 | |
468eedde TM |
1128 | trace_ocfs2_setattr(inode, dentry, |
1129 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1130 | dentry->d_name.len, dentry->d_name.name, | |
1131 | attr->ia_valid, attr->ia_mode, | |
ba613560 EB |
1132 | from_kuid(&init_user_ns, attr->ia_uid), |
1133 | from_kgid(&init_user_ns, attr->ia_gid)); | |
ccd979bd | 1134 | |
bc535809 SM |
1135 | /* ensuring we don't even attempt to truncate a symlink */ |
1136 | if (S_ISLNK(inode->i_mode)) | |
1137 | attr->ia_valid &= ~ATTR_SIZE; | |
1138 | ||
ccd979bd MF |
1139 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
1140 | | ATTR_GID | ATTR_UID | ATTR_MODE) | |
468eedde | 1141 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) |
ccd979bd | 1142 | return 0; |
ccd979bd | 1143 | |
2f221d6f | 1144 | status = setattr_prepare(&init_user_ns, dentry, attr); |
ccd979bd MF |
1145 | if (status) |
1146 | return status; | |
1147 | ||
9c89fe0a JK |
1148 | if (is_quota_modification(inode, attr)) { |
1149 | status = dquot_initialize(inode); | |
1150 | if (status) | |
1151 | return status; | |
1152 | } | |
ccd979bd MF |
1153 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
1154 | if (size_change) { | |
28f5a8a7 | 1155 | /* |
1156 | * Here we should wait dio to finish before inode lock | |
1157 | * to avoid a deadlock between ocfs2_setattr() and | |
1158 | * ocfs2_dio_end_io_write() | |
1159 | */ | |
1160 | inode_dio_wait(inode); | |
1161 | ||
ccd979bd MF |
1162 | status = ocfs2_rw_lock(inode, 1); |
1163 | if (status < 0) { | |
1164 | mlog_errno(status); | |
1165 | goto bail; | |
1166 | } | |
1167 | } | |
1168 | ||
b891fa50 ER |
1169 | had_lock = ocfs2_inode_lock_tracker(inode, &bh, 1, &oh); |
1170 | if (had_lock < 0) { | |
1171 | status = had_lock; | |
ccd979bd | 1172 | goto bail_unlock_rw; |
b891fa50 ER |
1173 | } else if (had_lock) { |
1174 | /* | |
1175 | * As far as we know, ocfs2_setattr() could only be the first | |
1176 | * VFS entry point in the call chain of recursive cluster | |
1177 | * locking issue. | |
1178 | * | |
1179 | * For instance: | |
1180 | * chmod_common() | |
1181 | * notify_change() | |
1182 | * ocfs2_setattr() | |
1183 | * posix_acl_chmod() | |
1184 | * ocfs2_iop_get_acl() | |
1185 | * | |
1186 | * But, we're not 100% sure if it's always true, because the | |
1187 | * ordering of the VFS entry points in the call chain is out | |
1188 | * of our control. So, we'd better dump the stack here to | |
1189 | * catch the other cases of recursive locking. | |
1190 | */ | |
1191 | mlog(ML_ERROR, "Another case of recursive locking:\n"); | |
1192 | dump_stack(); | |
ccd979bd | 1193 | } |
3d46a44a | 1194 | inode_locked = 1; |
ccd979bd | 1195 | |
d62e74be | 1196 | if (size_change) { |
5051f768 WW |
1197 | status = inode_newsize_ok(inode, attr->ia_size); |
1198 | if (status) | |
ce76fd30 | 1199 | goto bail_unlock; |
ce76fd30 | 1200 | |
d62e74be | 1201 | if (i_size_read(inode) >= attr->ia_size) { |
2b4e30fb JB |
1202 | if (ocfs2_should_order_data(inode)) { |
1203 | status = ocfs2_begin_ordered_truncate(inode, | |
1204 | attr->ia_size); | |
1205 | if (status) | |
1206 | goto bail_unlock; | |
1207 | } | |
ccd979bd | 1208 | status = ocfs2_truncate_file(inode, bh, attr->ia_size); |
2b4e30fb | 1209 | } else |
65ed39d6 | 1210 | status = ocfs2_extend_file(inode, bh, attr->ia_size); |
ccd979bd MF |
1211 | if (status < 0) { |
1212 | if (status != -ENOSPC) | |
1213 | mlog_errno(status); | |
1214 | status = -ENOSPC; | |
1215 | goto bail_unlock; | |
1216 | } | |
1217 | } | |
1218 | ||
488c8ef0 EB |
1219 | if ((attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) || |
1220 | (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) { | |
65bac575 JK |
1221 | /* |
1222 | * Gather pointers to quota structures so that allocation / | |
1223 | * freeing of quota structures happens here and not inside | |
b43fa828 | 1224 | * dquot_transfer() where we have problems with lock ordering |
65bac575 | 1225 | */ |
488c8ef0 | 1226 | if (attr->ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid) |
a90714c1 JK |
1227 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
1228 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { | |
aca645a6 | 1229 | transfer_to[USRQUOTA] = dqget(sb, make_kqid_uid(attr->ia_uid)); |
6184fc0b JK |
1230 | if (IS_ERR(transfer_to[USRQUOTA])) { |
1231 | status = PTR_ERR(transfer_to[USRQUOTA]); | |
ce750f43 | 1232 | transfer_to[USRQUOTA] = NULL; |
a90714c1 | 1233 | goto bail_unlock; |
65bac575 | 1234 | } |
a90714c1 | 1235 | } |
488c8ef0 | 1236 | if (attr->ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid) |
a90714c1 JK |
1237 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
1238 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { | |
aca645a6 | 1239 | transfer_to[GRPQUOTA] = dqget(sb, make_kqid_gid(attr->ia_gid)); |
6184fc0b JK |
1240 | if (IS_ERR(transfer_to[GRPQUOTA])) { |
1241 | status = PTR_ERR(transfer_to[GRPQUOTA]); | |
ce750f43 | 1242 | transfer_to[GRPQUOTA] = NULL; |
a90714c1 | 1243 | goto bail_unlock; |
65bac575 | 1244 | } |
a90714c1 | 1245 | } |
90bd070a | 1246 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
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); | |
90bd070a | 1252 | goto bail_unlock_alloc; |
a90714c1 | 1253 | } |
52a9ee28 | 1254 | status = __dquot_transfer(inode, transfer_to); |
a90714c1 JK |
1255 | if (status < 0) |
1256 | goto bail_commit; | |
1257 | } else { | |
90bd070a | 1258 | down_write(&OCFS2_I(inode)->ip_alloc_sem); |
a90714c1 JK |
1259 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
1260 | if (IS_ERR(handle)) { | |
1261 | status = PTR_ERR(handle); | |
1262 | mlog_errno(status); | |
90bd070a | 1263 | goto bail_unlock_alloc; |
a90714c1 | 1264 | } |
ccd979bd MF |
1265 | } |
1266 | ||
2f221d6f | 1267 | setattr_copy(&init_user_ns, inode, attr); |
1025774c CH |
1268 | mark_inode_dirty(inode); |
1269 | ||
ccd979bd MF |
1270 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
1271 | if (status < 0) | |
1272 | mlog_errno(status); | |
1273 | ||
1274 | bail_commit: | |
02dc1af4 | 1275 | ocfs2_commit_trans(osb, handle); |
90bd070a WW |
1276 | bail_unlock_alloc: |
1277 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
ccd979bd | 1278 | bail_unlock: |
b891fa50 ER |
1279 | if (status && inode_locked) { |
1280 | ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock); | |
3d46a44a TS |
1281 | inode_locked = 0; |
1282 | } | |
ccd979bd MF |
1283 | bail_unlock_rw: |
1284 | if (size_change) | |
1285 | ocfs2_rw_unlock(inode, 1); | |
1286 | bail: | |
ccd979bd | 1287 | |
65bac575 | 1288 | /* Release quota pointers in case we acquired them */ |
52362810 | 1289 | for (qtype = 0; qtype < OCFS2_MAXQUOTAS; qtype++) |
65bac575 | 1290 | dqput(transfer_to[qtype]); |
65bac575 | 1291 | |
060bc66d | 1292 | if (!status && attr->ia_valid & ATTR_MODE) { |
5ee0fbd5 | 1293 | status = ocfs2_acl_chmod(inode, bh); |
060bc66d TY |
1294 | if (status < 0) |
1295 | mlog_errno(status); | |
1296 | } | |
3d46a44a | 1297 | if (inode_locked) |
b891fa50 | 1298 | ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock); |
060bc66d | 1299 | |
5ee0fbd5 | 1300 | brelse(bh); |
ccd979bd MF |
1301 | return status; |
1302 | } | |
1303 | ||
549c7297 CB |
1304 | int ocfs2_getattr(struct user_namespace *mnt_userns, const struct path *path, |
1305 | struct kstat *stat, u32 request_mask, unsigned int flags) | |
ccd979bd | 1306 | { |
a528d35e DH |
1307 | struct inode *inode = d_inode(path->dentry); |
1308 | struct super_block *sb = path->dentry->d_sb; | |
ccd979bd MF |
1309 | struct ocfs2_super *osb = sb->s_fs_info; |
1310 | int err; | |
1311 | ||
a528d35e | 1312 | err = ocfs2_inode_revalidate(path->dentry); |
ccd979bd MF |
1313 | if (err) { |
1314 | if (err != -ENOENT) | |
1315 | mlog_errno(err); | |
1316 | goto bail; | |
1317 | } | |
1318 | ||
0d56a451 | 1319 | generic_fillattr(&init_user_ns, inode, stat); |
d6364627 JH |
1320 | /* |
1321 | * If there is inline data in the inode, the inode will normally not | |
1322 | * have data blocks allocated (it may have an external xattr block). | |
1323 | * Report at least one sector for such files, so tools like tar, rsync, | |
1324 | * others don't incorrectly think the file is completely sparse. | |
1325 | */ | |
1326 | if (unlikely(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL)) | |
1327 | stat->blocks += (stat->size + 511)>>9; | |
ccd979bd MF |
1328 | |
1329 | /* We set the blksize from the cluster size for performance */ | |
1330 | stat->blksize = osb->s_clustersize; | |
1331 | ||
1332 | bail: | |
ccd979bd MF |
1333 | return err; |
1334 | } | |
1335 | ||
549c7297 CB |
1336 | int ocfs2_permission(struct user_namespace *mnt_userns, struct inode *inode, |
1337 | int mask) | |
d38eb8db | 1338 | { |
b891fa50 ER |
1339 | int ret, had_lock; |
1340 | struct ocfs2_lock_holder oh; | |
d38eb8db | 1341 | |
10556cb2 | 1342 | if (mask & MAY_NOT_BLOCK) |
b74c79e9 NP |
1343 | return -ECHILD; |
1344 | ||
b891fa50 ER |
1345 | had_lock = ocfs2_inode_lock_tracker(inode, NULL, 0, &oh); |
1346 | if (had_lock < 0) { | |
1347 | ret = had_lock; | |
d38eb8db | 1348 | goto out; |
b891fa50 ER |
1349 | } else if (had_lock) { |
1350 | /* See comments in ocfs2_setattr() for details. | |
1351 | * The call chain of this case could be: | |
1352 | * do_sys_open() | |
1353 | * may_open() | |
1354 | * inode_permission() | |
1355 | * ocfs2_permission() | |
1356 | * ocfs2_iop_get_acl() | |
1357 | */ | |
1358 | mlog(ML_ERROR, "Another case of recursive locking:\n"); | |
1359 | dump_stack(); | |
d38eb8db TY |
1360 | } |
1361 | ||
47291baa | 1362 | ret = generic_permission(&init_user_ns, inode, mask); |
d38eb8db | 1363 | |
b891fa50 | 1364 | ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock); |
d38eb8db | 1365 | out: |
d38eb8db TY |
1366 | return ret; |
1367 | } | |
1368 | ||
b2580103 MF |
1369 | static int __ocfs2_write_remove_suid(struct inode *inode, |
1370 | struct buffer_head *bh) | |
ccd979bd MF |
1371 | { |
1372 | int ret; | |
1fabe148 | 1373 | handle_t *handle; |
ccd979bd MF |
1374 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1375 | struct ocfs2_dinode *di; | |
1376 | ||
468eedde TM |
1377 | trace_ocfs2_write_remove_suid( |
1378 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1379 | inode->i_mode); | |
ccd979bd | 1380 | |
65eff9cc | 1381 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
fa38e92c JK |
1382 | if (IS_ERR(handle)) { |
1383 | ret = PTR_ERR(handle); | |
ccd979bd MF |
1384 | mlog_errno(ret); |
1385 | goto out; | |
1386 | } | |
1387 | ||
0cf2f763 | 1388 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh, |
13723d00 | 1389 | OCFS2_JOURNAL_ACCESS_WRITE); |
ccd979bd MF |
1390 | if (ret < 0) { |
1391 | mlog_errno(ret); | |
b2580103 | 1392 | goto out_trans; |
ccd979bd MF |
1393 | } |
1394 | ||
1395 | inode->i_mode &= ~S_ISUID; | |
1396 | if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP)) | |
1397 | inode->i_mode &= ~S_ISGID; | |
1398 | ||
1399 | di = (struct ocfs2_dinode *) bh->b_data; | |
1400 | di->i_mode = cpu_to_le16(inode->i_mode); | |
6fdb702d | 1401 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
ccd979bd | 1402 | |
ec20cec7 | 1403 | ocfs2_journal_dirty(handle, bh); |
b2580103 | 1404 | |
ccd979bd | 1405 | out_trans: |
02dc1af4 | 1406 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1407 | out: |
ccd979bd MF |
1408 | return ret; |
1409 | } | |
1410 | ||
b2580103 MF |
1411 | static int ocfs2_write_remove_suid(struct inode *inode) |
1412 | { | |
1413 | int ret; | |
1414 | struct buffer_head *bh = NULL; | |
b2580103 | 1415 | |
b657c95c | 1416 | ret = ocfs2_read_inode_block(inode, &bh); |
b2580103 MF |
1417 | if (ret < 0) { |
1418 | mlog_errno(ret); | |
1419 | goto out; | |
1420 | } | |
1421 | ||
1422 | ret = __ocfs2_write_remove_suid(inode, bh); | |
1423 | out: | |
1424 | brelse(bh); | |
1425 | return ret; | |
1426 | } | |
1427 | ||
2ae99a60 MF |
1428 | /* |
1429 | * Allocate enough extents to cover the region starting at byte offset | |
1430 | * start for len bytes. Existing extents are skipped, any extents | |
1431 | * added are marked as "unwritten". | |
1432 | */ | |
1433 | static int ocfs2_allocate_unwritten_extents(struct inode *inode, | |
1434 | u64 start, u64 len) | |
1435 | { | |
1436 | int ret; | |
1437 | u32 cpos, phys_cpos, clusters, alloc_size; | |
1afc32b9 MF |
1438 | u64 end = start + len; |
1439 | struct buffer_head *di_bh = NULL; | |
1440 | ||
1441 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
b657c95c | 1442 | ret = ocfs2_read_inode_block(inode, &di_bh); |
1afc32b9 MF |
1443 | if (ret) { |
1444 | mlog_errno(ret); | |
1445 | goto out; | |
1446 | } | |
1447 | ||
1448 | /* | |
1449 | * Nothing to do if the requested reservation range | |
1450 | * fits within the inode. | |
1451 | */ | |
1452 | if (ocfs2_size_fits_inline_data(di_bh, end)) | |
1453 | goto out; | |
1454 | ||
1455 | ret = ocfs2_convert_inline_data_to_extents(inode, di_bh); | |
1456 | if (ret) { | |
1457 | mlog_errno(ret); | |
1458 | goto out; | |
1459 | } | |
1460 | } | |
2ae99a60 MF |
1461 | |
1462 | /* | |
1463 | * We consider both start and len to be inclusive. | |
1464 | */ | |
1465 | cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
1466 | clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len); | |
1467 | clusters -= cpos; | |
1468 | ||
1469 | while (clusters) { | |
1470 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, | |
1471 | &alloc_size, NULL); | |
1472 | if (ret) { | |
1473 | mlog_errno(ret); | |
1474 | goto out; | |
1475 | } | |
1476 | ||
1477 | /* | |
1478 | * Hole or existing extent len can be arbitrary, so | |
1479 | * cap it to our own allocation request. | |
1480 | */ | |
1481 | if (alloc_size > clusters) | |
1482 | alloc_size = clusters; | |
1483 | ||
1484 | if (phys_cpos) { | |
1485 | /* | |
1486 | * We already have an allocation at this | |
1487 | * region so we can safely skip it. | |
1488 | */ | |
1489 | goto next; | |
1490 | } | |
1491 | ||
5bc55d65 | 1492 | ret = ocfs2_extend_allocation(inode, cpos, alloc_size, 1); |
2ae99a60 MF |
1493 | if (ret) { |
1494 | if (ret != -ENOSPC) | |
1495 | mlog_errno(ret); | |
1496 | goto out; | |
1497 | } | |
1498 | ||
1499 | next: | |
1500 | cpos += alloc_size; | |
1501 | clusters -= alloc_size; | |
1502 | } | |
1503 | ||
1504 | ret = 0; | |
1505 | out: | |
1afc32b9 MF |
1506 | |
1507 | brelse(di_bh); | |
2ae99a60 MF |
1508 | return ret; |
1509 | } | |
1510 | ||
063c4561 MF |
1511 | /* |
1512 | * Truncate a byte range, avoiding pages within partial clusters. This | |
1513 | * preserves those pages for the zeroing code to write to. | |
1514 | */ | |
1515 | static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start, | |
1516 | u64 byte_len) | |
1517 | { | |
1518 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1519 | loff_t start, end; | |
1520 | struct address_space *mapping = inode->i_mapping; | |
1521 | ||
1522 | start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start); | |
1523 | end = byte_start + byte_len; | |
1524 | end = end & ~(osb->s_clustersize - 1); | |
1525 | ||
1526 | if (start < end) { | |
1527 | unmap_mapping_range(mapping, start, end - start, 0); | |
1528 | truncate_inode_pages_range(mapping, start, end - 1); | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | static int ocfs2_zero_partial_clusters(struct inode *inode, | |
1533 | u64 start, u64 len) | |
1534 | { | |
1535 | int ret = 0; | |
d21c353d AS |
1536 | u64 tmpend = 0; |
1537 | u64 end = start + len; | |
063c4561 MF |
1538 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1539 | unsigned int csize = osb->s_clustersize; | |
1540 | handle_t *handle; | |
1541 | ||
1542 | /* | |
1543 | * The "start" and "end" values are NOT necessarily part of | |
1544 | * the range whose allocation is being deleted. Rather, this | |
1545 | * is what the user passed in with the request. We must zero | |
1546 | * partial clusters here. There's no need to worry about | |
1547 | * physical allocation - the zeroing code knows to skip holes. | |
1548 | */ | |
468eedde TM |
1549 | trace_ocfs2_zero_partial_clusters( |
1550 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1551 | (unsigned long long)start, (unsigned long long)end); | |
063c4561 MF |
1552 | |
1553 | /* | |
1554 | * If both edges are on a cluster boundary then there's no | |
1555 | * zeroing required as the region is part of the allocation to | |
1556 | * be truncated. | |
1557 | */ | |
1558 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) | |
1559 | goto out; | |
1560 | ||
1561 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
fa38e92c JK |
1562 | if (IS_ERR(handle)) { |
1563 | ret = PTR_ERR(handle); | |
063c4561 MF |
1564 | mlog_errno(ret); |
1565 | goto out; | |
1566 | } | |
1567 | ||
1568 | /* | |
d21c353d AS |
1569 | * If start is on a cluster boundary and end is somewhere in another |
1570 | * cluster, we have not COWed the cluster starting at start, unless | |
1571 | * end is also within the same cluster. So, in this case, we skip this | |
1572 | * first call to ocfs2_zero_range_for_truncate() truncate and move on | |
1573 | * to the next one. | |
063c4561 | 1574 | */ |
d21c353d AS |
1575 | if ((start & (csize - 1)) != 0) { |
1576 | /* | |
1577 | * We want to get the byte offset of the end of the 1st | |
1578 | * cluster. | |
1579 | */ | |
1580 | tmpend = (u64)osb->s_clustersize + | |
1581 | (start & ~(osb->s_clustersize - 1)); | |
1582 | if (tmpend > end) | |
1583 | tmpend = end; | |
063c4561 | 1584 | |
d21c353d AS |
1585 | trace_ocfs2_zero_partial_clusters_range1( |
1586 | (unsigned long long)start, | |
1587 | (unsigned long long)tmpend); | |
063c4561 | 1588 | |
d21c353d AS |
1589 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, |
1590 | tmpend); | |
1591 | if (ret) | |
1592 | mlog_errno(ret); | |
1593 | } | |
063c4561 MF |
1594 | |
1595 | if (tmpend < end) { | |
1596 | /* | |
1597 | * This may make start and end equal, but the zeroing | |
1598 | * code will skip any work in that case so there's no | |
1599 | * need to catch it up here. | |
1600 | */ | |
1601 | start = end & ~(osb->s_clustersize - 1); | |
1602 | ||
468eedde TM |
1603 | trace_ocfs2_zero_partial_clusters_range2( |
1604 | (unsigned long long)start, (unsigned long long)end); | |
063c4561 MF |
1605 | |
1606 | ret = ocfs2_zero_range_for_truncate(inode, handle, start, end); | |
1607 | if (ret) | |
1608 | mlog_errno(ret); | |
1609 | } | |
6fdb702d | 1610 | ocfs2_update_inode_fsync_trans(handle, inode, 1); |
063c4561 MF |
1611 | |
1612 | ocfs2_commit_trans(osb, handle); | |
1613 | out: | |
1614 | return ret; | |
1615 | } | |
1616 | ||
c1631d4a TY |
1617 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
1618 | { | |
1619 | int i; | |
1620 | struct ocfs2_extent_rec *rec = NULL; | |
1621 | ||
1622 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
1623 | ||
1624 | rec = &el->l_recs[i]; | |
1625 | ||
1626 | if (le32_to_cpu(rec->e_cpos) < pos) | |
1627 | break; | |
1628 | } | |
1629 | ||
1630 | return i; | |
1631 | } | |
1632 | ||
1633 | /* | |
1634 | * Helper to calculate the punching pos and length in one run, we handle the | |
1635 | * following three cases in order: | |
1636 | * | |
1637 | * - remove the entire record | |
1638 | * - remove a partial record | |
1639 | * - no record needs to be removed (hole-punching completed) | |
1640 | */ | |
1641 | static void ocfs2_calc_trunc_pos(struct inode *inode, | |
1642 | struct ocfs2_extent_list *el, | |
1643 | struct ocfs2_extent_rec *rec, | |
1644 | u32 trunc_start, u32 *trunc_cpos, | |
1645 | u32 *trunc_len, u32 *trunc_end, | |
1646 | u64 *blkno, int *done) | |
1647 | { | |
1648 | int ret = 0; | |
1649 | u32 coff, range; | |
1650 | ||
1651 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); | |
1652 | ||
1653 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { | |
9a790ba1 TY |
1654 | /* |
1655 | * remove an entire extent record. | |
1656 | */ | |
c1631d4a TY |
1657 | *trunc_cpos = le32_to_cpu(rec->e_cpos); |
1658 | /* | |
1659 | * Skip holes if any. | |
1660 | */ | |
1661 | if (range < *trunc_end) | |
1662 | *trunc_end = range; | |
1663 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); | |
1664 | *blkno = le64_to_cpu(rec->e_blkno); | |
1665 | *trunc_end = le32_to_cpu(rec->e_cpos); | |
1666 | } else if (range > trunc_start) { | |
9a790ba1 TY |
1667 | /* |
1668 | * remove a partial extent record, which means we're | |
1669 | * removing the last extent record. | |
1670 | */ | |
c1631d4a | 1671 | *trunc_cpos = trunc_start; |
9a790ba1 TY |
1672 | /* |
1673 | * skip hole if any. | |
1674 | */ | |
1675 | if (range < *trunc_end) | |
1676 | *trunc_end = range; | |
c1631d4a TY |
1677 | *trunc_len = *trunc_end - trunc_start; |
1678 | coff = trunc_start - le32_to_cpu(rec->e_cpos); | |
1679 | *blkno = le64_to_cpu(rec->e_blkno) + | |
1680 | ocfs2_clusters_to_blocks(inode->i_sb, coff); | |
1681 | *trunc_end = trunc_start; | |
1682 | } else { | |
1683 | /* | |
1684 | * It may have two following possibilities: | |
1685 | * | |
1686 | * - last record has been removed | |
1687 | * - trunc_start was within a hole | |
1688 | * | |
1689 | * both two cases mean the completion of hole punching. | |
1690 | */ | |
1691 | ret = 1; | |
1692 | } | |
1693 | ||
1694 | *done = ret; | |
1695 | } | |
1696 | ||
29ac8e85 DW |
1697 | int ocfs2_remove_inode_range(struct inode *inode, |
1698 | struct buffer_head *di_bh, u64 byte_start, | |
1699 | u64 byte_len) | |
063c4561 | 1700 | { |
c1631d4a TY |
1701 | int ret = 0, flags = 0, done = 0, i; |
1702 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; | |
1703 | u32 cluster_in_el; | |
063c4561 MF |
1704 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1705 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
b1967d0e | 1706 | struct address_space *mapping = inode->i_mapping; |
fecc0112 | 1707 | struct ocfs2_extent_tree et; |
c1631d4a TY |
1708 | struct ocfs2_path *path = NULL; |
1709 | struct ocfs2_extent_list *el = NULL; | |
1710 | struct ocfs2_extent_rec *rec = NULL; | |
e8aec068 | 1711 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
c1631d4a | 1712 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
063c4561 | 1713 | |
5e404e9e | 1714 | ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode), di_bh); |
063c4561 MF |
1715 | ocfs2_init_dealloc_ctxt(&dealloc); |
1716 | ||
468eedde TM |
1717 | trace_ocfs2_remove_inode_range( |
1718 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
1719 | (unsigned long long)byte_start, | |
1720 | (unsigned long long)byte_len); | |
1721 | ||
063c4561 MF |
1722 | if (byte_len == 0) |
1723 | return 0; | |
1724 | ||
1afc32b9 MF |
1725 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
1726 | ret = ocfs2_truncate_inline(inode, di_bh, byte_start, | |
b1967d0e MF |
1727 | byte_start + byte_len, 0); |
1728 | if (ret) { | |
1afc32b9 | 1729 | mlog_errno(ret); |
b1967d0e MF |
1730 | goto out; |
1731 | } | |
1732 | /* | |
1733 | * There's no need to get fancy with the page cache | |
1734 | * truncate of an inline-data inode. We're talking | |
1735 | * about less than a page here, which will be cached | |
1736 | * in the dinode buffer anyway. | |
1737 | */ | |
1738 | unmap_mapping_range(mapping, 0, 0, 0); | |
1739 | truncate_inode_pages(mapping, 0); | |
1740 | goto out; | |
1afc32b9 MF |
1741 | } |
1742 | ||
e8aec068 TY |
1743 | /* |
1744 | * For reflinks, we may need to CoW 2 clusters which might be | |
1745 | * partially zero'd later, if hole's start and end offset were | |
1746 | * within one cluster(means is not exactly aligned to clustersize). | |
1747 | */ | |
1748 | ||
84e40080 | 1749 | if (ocfs2_is_refcount_inode(inode)) { |
e8aec068 TY |
1750 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start); |
1751 | if (ret) { | |
1752 | mlog_errno(ret); | |
1753 | goto out; | |
1754 | } | |
1755 | ||
1756 | ret = ocfs2_cow_file_pos(inode, di_bh, byte_start + byte_len); | |
1757 | if (ret) { | |
1758 | mlog_errno(ret); | |
1759 | goto out; | |
1760 | } | |
1761 | } | |
1762 | ||
063c4561 | 1763 | trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start); |
c1631d4a TY |
1764 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
1765 | cluster_in_el = trunc_end; | |
063c4561 | 1766 | |
063c4561 MF |
1767 | ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len); |
1768 | if (ret) { | |
1769 | mlog_errno(ret); | |
1770 | goto out; | |
1771 | } | |
1772 | ||
c1631d4a TY |
1773 | path = ocfs2_new_path_from_et(&et); |
1774 | if (!path) { | |
1775 | ret = -ENOMEM; | |
1776 | mlog_errno(ret); | |
1777 | goto out; | |
1778 | } | |
1779 | ||
1780 | while (trunc_end > trunc_start) { | |
1781 | ||
1782 | ret = ocfs2_find_path(INODE_CACHE(inode), path, | |
1783 | cluster_in_el); | |
063c4561 MF |
1784 | if (ret) { |
1785 | mlog_errno(ret); | |
1786 | goto out; | |
1787 | } | |
1788 | ||
c1631d4a | 1789 | el = path_leaf_el(path); |
063c4561 | 1790 | |
c1631d4a TY |
1791 | i = ocfs2_find_rec(el, trunc_end); |
1792 | /* | |
1793 | * Need to go to previous extent block. | |
1794 | */ | |
1795 | if (i < 0) { | |
1796 | if (path->p_tree_depth == 0) | |
1797 | break; | |
063c4561 | 1798 | |
c1631d4a TY |
1799 | ret = ocfs2_find_cpos_for_left_leaf(inode->i_sb, |
1800 | path, | |
1801 | &cluster_in_el); | |
063c4561 MF |
1802 | if (ret) { |
1803 | mlog_errno(ret); | |
1804 | goto out; | |
1805 | } | |
c1631d4a TY |
1806 | |
1807 | /* | |
1808 | * We've reached the leftmost extent block, | |
1809 | * it's safe to leave. | |
1810 | */ | |
1811 | if (cluster_in_el == 0) | |
1812 | break; | |
1813 | ||
1814 | /* | |
1815 | * The 'pos' searched for previous extent block is | |
1816 | * always one cluster less than actual trunc_end. | |
1817 | */ | |
1818 | trunc_end = cluster_in_el + 1; | |
1819 | ||
1820 | ocfs2_reinit_path(path, 1); | |
1821 | ||
1822 | continue; | |
1823 | ||
1824 | } else | |
1825 | rec = &el->l_recs[i]; | |
1826 | ||
1827 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, &trunc_cpos, | |
1828 | &trunc_len, &trunc_end, &blkno, &done); | |
1829 | if (done) | |
1830 | break; | |
1831 | ||
1832 | flags = rec->e_flags; | |
1833 | phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, blkno); | |
1834 | ||
1835 | ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos, | |
1836 | phys_cpos, trunc_len, flags, | |
f62f12b3 | 1837 | &dealloc, refcount_loc, false); |
c1631d4a TY |
1838 | if (ret < 0) { |
1839 | mlog_errno(ret); | |
1840 | goto out; | |
063c4561 MF |
1841 | } |
1842 | ||
c1631d4a TY |
1843 | cluster_in_el = trunc_end; |
1844 | ||
1845 | ocfs2_reinit_path(path, 1); | |
063c4561 MF |
1846 | } |
1847 | ||
1848 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); | |
1849 | ||
1850 | out: | |
7aebff18 | 1851 | ocfs2_free_path(path); |
063c4561 MF |
1852 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1853 | ocfs2_run_deallocs(osb, &dealloc); | |
1854 | ||
1855 | return ret; | |
1856 | } | |
1857 | ||
6bba4471 JB |
1858 | /* |
1859 | * zero out partial blocks of one cluster. | |
1860 | * | |
1861 | * start: file offset where zero starts, will be made upper block aligned. | |
1862 | * len: it will be trimmed to the end of current cluster if "start + len" | |
1863 | * is bigger than it. | |
1864 | */ | |
1865 | static int ocfs2_zeroout_partial_cluster(struct inode *inode, | |
1866 | u64 start, u64 len) | |
1867 | { | |
1868 | int ret; | |
1869 | u64 start_block, end_block, nr_blocks; | |
1870 | u64 p_block, offset; | |
1871 | u32 cluster, p_cluster, nr_clusters; | |
1872 | struct super_block *sb = inode->i_sb; | |
1873 | u64 end = ocfs2_align_bytes_to_clusters(sb, start); | |
1874 | ||
1875 | if (start + len < end) | |
1876 | end = start + len; | |
1877 | ||
1878 | start_block = ocfs2_blocks_for_bytes(sb, start); | |
1879 | end_block = ocfs2_blocks_for_bytes(sb, end); | |
1880 | nr_blocks = end_block - start_block; | |
1881 | if (!nr_blocks) | |
1882 | return 0; | |
1883 | ||
1884 | cluster = ocfs2_bytes_to_clusters(sb, start); | |
1885 | ret = ocfs2_get_clusters(inode, cluster, &p_cluster, | |
1886 | &nr_clusters, NULL); | |
1887 | if (ret) | |
1888 | return ret; | |
1889 | if (!p_cluster) | |
1890 | return 0; | |
1891 | ||
1892 | offset = start_block - ocfs2_clusters_to_blocks(sb, cluster); | |
1893 | p_block = ocfs2_clusters_to_blocks(sb, p_cluster) + offset; | |
1894 | return sb_issue_zeroout(sb, p_block, nr_blocks, GFP_NOFS); | |
1895 | } | |
1896 | ||
b2580103 MF |
1897 | /* |
1898 | * Parts of this function taken from xfs_change_file_space() | |
1899 | */ | |
385820a3 MF |
1900 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
1901 | loff_t f_pos, unsigned int cmd, | |
1902 | struct ocfs2_space_resv *sr, | |
1903 | int change_size) | |
b2580103 MF |
1904 | { |
1905 | int ret; | |
1906 | s64 llen; | |
6bba4471 | 1907 | loff_t size, orig_isize; |
b2580103 MF |
1908 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1909 | struct buffer_head *di_bh = NULL; | |
1910 | handle_t *handle; | |
a00cce35 | 1911 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
b2580103 | 1912 | |
b2580103 MF |
1913 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
1914 | return -EROFS; | |
1915 | ||
5955102c | 1916 | inode_lock(inode); |
b2580103 MF |
1917 | |
1918 | /* | |
1919 | * This prevents concurrent writes on other nodes | |
1920 | */ | |
1921 | ret = ocfs2_rw_lock(inode, 1); | |
1922 | if (ret) { | |
1923 | mlog_errno(ret); | |
1924 | goto out; | |
1925 | } | |
1926 | ||
e63aecb6 | 1927 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
b2580103 MF |
1928 | if (ret) { |
1929 | mlog_errno(ret); | |
1930 | goto out_rw_unlock; | |
1931 | } | |
1932 | ||
1933 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { | |
1934 | ret = -EPERM; | |
e63aecb6 | 1935 | goto out_inode_unlock; |
b2580103 MF |
1936 | } |
1937 | ||
6bba4471 | 1938 | orig_isize = i_size_read(inode); |
b2580103 MF |
1939 | switch (sr->l_whence) { |
1940 | case 0: /*SEEK_SET*/ | |
1941 | break; | |
1942 | case 1: /*SEEK_CUR*/ | |
385820a3 | 1943 | sr->l_start += f_pos; |
b2580103 MF |
1944 | break; |
1945 | case 2: /*SEEK_END*/ | |
6bba4471 | 1946 | sr->l_start += orig_isize; |
b2580103 MF |
1947 | break; |
1948 | default: | |
1949 | ret = -EINVAL; | |
e63aecb6 | 1950 | goto out_inode_unlock; |
b2580103 MF |
1951 | } |
1952 | sr->l_whence = 0; | |
1953 | ||
1954 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; | |
1955 | ||
1956 | if (sr->l_start < 0 | |
1957 | || sr->l_start > max_off | |
1958 | || (sr->l_start + llen) < 0 | |
1959 | || (sr->l_start + llen) > max_off) { | |
1960 | ret = -EINVAL; | |
e63aecb6 | 1961 | goto out_inode_unlock; |
b2580103 | 1962 | } |
385820a3 | 1963 | size = sr->l_start + sr->l_len; |
b2580103 | 1964 | |
a2a3b398 TS |
1965 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64 || |
1966 | cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) { | |
b2580103 MF |
1967 | if (sr->l_len <= 0) { |
1968 | ret = -EINVAL; | |
e63aecb6 | 1969 | goto out_inode_unlock; |
b2580103 MF |
1970 | } |
1971 | } | |
1972 | ||
385820a3 | 1973 | if (file && should_remove_suid(file->f_path.dentry)) { |
b2580103 MF |
1974 | ret = __ocfs2_write_remove_suid(inode, di_bh); |
1975 | if (ret) { | |
1976 | mlog_errno(ret); | |
e63aecb6 | 1977 | goto out_inode_unlock; |
b2580103 MF |
1978 | } |
1979 | } | |
1980 | ||
1981 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
1982 | switch (cmd) { | |
1983 | case OCFS2_IOC_RESVSP: | |
1984 | case OCFS2_IOC_RESVSP64: | |
1985 | /* | |
1986 | * This takes unsigned offsets, but the signed ones we | |
1987 | * pass have been checked against overflow above. | |
1988 | */ | |
1989 | ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start, | |
1990 | sr->l_len); | |
1991 | break; | |
1992 | case OCFS2_IOC_UNRESVSP: | |
1993 | case OCFS2_IOC_UNRESVSP64: | |
1994 | ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start, | |
1995 | sr->l_len); | |
1996 | break; | |
1997 | default: | |
1998 | ret = -EINVAL; | |
1999 | } | |
6bba4471 JB |
2000 | |
2001 | /* zeroout eof blocks in the cluster. */ | |
2002 | if (!ret && change_size && orig_isize < size) { | |
2003 | ret = ocfs2_zeroout_partial_cluster(inode, orig_isize, | |
2004 | size - orig_isize); | |
2005 | if (!ret) | |
2006 | i_size_write(inode, size); | |
2007 | } | |
b2580103 MF |
2008 | up_write(&OCFS2_I(inode)->ip_alloc_sem); |
2009 | if (ret) { | |
2010 | mlog_errno(ret); | |
e63aecb6 | 2011 | goto out_inode_unlock; |
b2580103 MF |
2012 | } |
2013 | ||
2014 | /* | |
2015 | * We update c/mtime for these changes | |
2016 | */ | |
2017 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
2018 | if (IS_ERR(handle)) { | |
2019 | ret = PTR_ERR(handle); | |
2020 | mlog_errno(ret); | |
e63aecb6 | 2021 | goto out_inode_unlock; |
b2580103 MF |
2022 | } |
2023 | ||
078cd827 | 2024 | inode->i_ctime = inode->i_mtime = current_time(inode); |
b2580103 MF |
2025 | ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); |
2026 | if (ret < 0) | |
2027 | mlog_errno(ret); | |
2028 | ||
a4e08d00 | 2029 | if (file && (file->f_flags & O_SYNC)) |
df295d4a MF |
2030 | handle->h_sync = 1; |
2031 | ||
b2580103 MF |
2032 | ocfs2_commit_trans(osb, handle); |
2033 | ||
e63aecb6 | 2034 | out_inode_unlock: |
b2580103 | 2035 | brelse(di_bh); |
e63aecb6 | 2036 | ocfs2_inode_unlock(inode, 1); |
b2580103 MF |
2037 | out_rw_unlock: |
2038 | ocfs2_rw_unlock(inode, 1); | |
2039 | ||
b2580103 | 2040 | out: |
5955102c | 2041 | inode_unlock(inode); |
b2580103 MF |
2042 | return ret; |
2043 | } | |
2044 | ||
385820a3 MF |
2045 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
2046 | struct ocfs2_space_resv *sr) | |
2047 | { | |
496ad9aa | 2048 | struct inode *inode = file_inode(file); |
c19a28e1 | 2049 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
fef6925c | 2050 | int ret; |
385820a3 MF |
2051 | |
2052 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && | |
2053 | !ocfs2_writes_unwritten_extents(osb)) | |
2054 | return -ENOTTY; | |
2055 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && | |
2056 | !ocfs2_sparse_alloc(osb)) | |
2057 | return -ENOTTY; | |
2058 | ||
2059 | if (!S_ISREG(inode->i_mode)) | |
2060 | return -EINVAL; | |
2061 | ||
2062 | if (!(file->f_mode & FMODE_WRITE)) | |
2063 | return -EBADF; | |
2064 | ||
fef6925c JK |
2065 | ret = mnt_want_write_file(file); |
2066 | if (ret) | |
2067 | return ret; | |
2068 | ret = __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0); | |
2069 | mnt_drop_write_file(file); | |
2070 | return ret; | |
385820a3 MF |
2071 | } |
2072 | ||
2fe17c10 | 2073 | static long ocfs2_fallocate(struct file *file, int mode, loff_t offset, |
385820a3 MF |
2074 | loff_t len) |
2075 | { | |
496ad9aa | 2076 | struct inode *inode = file_inode(file); |
385820a3 MF |
2077 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2078 | struct ocfs2_space_resv sr; | |
2079 | int change_size = 1; | |
db47fef2 | 2080 | int cmd = OCFS2_IOC_RESVSP64; |
385820a3 | 2081 | |
64c23e86 CH |
2082 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
2083 | return -EOPNOTSUPP; | |
385820a3 MF |
2084 | if (!ocfs2_writes_unwritten_extents(osb)) |
2085 | return -EOPNOTSUPP; | |
2086 | ||
385820a3 MF |
2087 | if (mode & FALLOC_FL_KEEP_SIZE) |
2088 | change_size = 0; | |
2089 | ||
db47fef2 JB |
2090 | if (mode & FALLOC_FL_PUNCH_HOLE) |
2091 | cmd = OCFS2_IOC_UNRESVSP64; | |
2092 | ||
385820a3 MF |
2093 | sr.l_whence = 0; |
2094 | sr.l_start = (s64)offset; | |
2095 | sr.l_len = (s64)len; | |
2096 | ||
db47fef2 JB |
2097 | return __ocfs2_change_file_space(NULL, inode, offset, cmd, &sr, |
2098 | change_size); | |
385820a3 MF |
2099 | } |
2100 | ||
293b2f70 TM |
2101 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
2102 | size_t count) | |
2103 | { | |
2104 | int ret = 0; | |
2105 | unsigned int extent_flags; | |
2106 | u32 cpos, clusters, extent_len, phys_cpos; | |
2107 | struct super_block *sb = inode->i_sb; | |
2108 | ||
2109 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || | |
84e40080 | 2110 | !ocfs2_is_refcount_inode(inode) || |
2f48d593 | 2111 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) |
293b2f70 TM |
2112 | return 0; |
2113 | ||
2114 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; | |
2115 | clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos; | |
2116 | ||
2117 | while (clusters) { | |
2118 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len, | |
2119 | &extent_flags); | |
2120 | if (ret < 0) { | |
2121 | mlog_errno(ret); | |
2122 | goto out; | |
2123 | } | |
2124 | ||
2125 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { | |
2126 | ret = 1; | |
2127 | break; | |
2128 | } | |
2129 | ||
2130 | if (extent_len > clusters) | |
2131 | extent_len = clusters; | |
2132 | ||
2133 | clusters -= extent_len; | |
2134 | cpos += extent_len; | |
2135 | } | |
2136 | out: | |
2137 | return ret; | |
2138 | } | |
2139 | ||
a11f7e63 MF |
2140 | static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos) |
2141 | { | |
2142 | int blockmask = inode->i_sb->s_blocksize - 1; | |
2143 | loff_t final_size = pos + count; | |
2144 | ||
2145 | if ((pos & blockmask) || (final_size & blockmask)) | |
2146 | return 1; | |
2147 | return 0; | |
2148 | } | |
2149 | ||
e74540b2 SZ |
2150 | static int ocfs2_inode_lock_for_extent_tree(struct inode *inode, |
2151 | struct buffer_head **di_bh, | |
2152 | int meta_level, | |
e74540b2 SZ |
2153 | int write_sem, |
2154 | int wait) | |
293b2f70 | 2155 | { |
e74540b2 | 2156 | int ret = 0; |
293b2f70 | 2157 | |
e74540b2 | 2158 | if (wait) |
2d797e9f | 2159 | ret = ocfs2_inode_lock(inode, di_bh, meta_level); |
e74540b2 | 2160 | else |
2d797e9f | 2161 | ret = ocfs2_try_inode_lock(inode, di_bh, meta_level); |
e74540b2 | 2162 | if (ret < 0) |
293b2f70 | 2163 | goto out; |
e74540b2 SZ |
2164 | |
2165 | if (wait) { | |
2166 | if (write_sem) | |
2167 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
2168 | else | |
2169 | down_read(&OCFS2_I(inode)->ip_alloc_sem); | |
2170 | } else { | |
2171 | if (write_sem) | |
2172 | ret = down_write_trylock(&OCFS2_I(inode)->ip_alloc_sem); | |
2173 | else | |
2174 | ret = down_read_trylock(&OCFS2_I(inode)->ip_alloc_sem); | |
2175 | ||
2176 | if (!ret) { | |
2177 | ret = -EAGAIN; | |
2178 | goto out_unlock; | |
2179 | } | |
293b2f70 TM |
2180 | } |
2181 | ||
e74540b2 | 2182 | return ret; |
293b2f70 | 2183 | |
e74540b2 SZ |
2184 | out_unlock: |
2185 | brelse(*di_bh); | |
2d797e9f | 2186 | *di_bh = NULL; |
e74540b2 | 2187 | ocfs2_inode_unlock(inode, meta_level); |
293b2f70 | 2188 | out: |
293b2f70 TM |
2189 | return ret; |
2190 | } | |
2191 | ||
e74540b2 SZ |
2192 | static void ocfs2_inode_unlock_for_extent_tree(struct inode *inode, |
2193 | struct buffer_head **di_bh, | |
2194 | int meta_level, | |
2195 | int write_sem) | |
2196 | { | |
2197 | if (write_sem) | |
2198 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
2199 | else | |
2200 | up_read(&OCFS2_I(inode)->ip_alloc_sem); | |
2201 | ||
2202 | brelse(*di_bh); | |
2203 | *di_bh = NULL; | |
2204 | ||
2205 | if (meta_level >= 0) | |
2206 | ocfs2_inode_unlock(inode, meta_level); | |
2207 | } | |
2208 | ||
b8908236 | 2209 | static int ocfs2_prepare_inode_for_write(struct file *file, |
c4c2416a | 2210 | loff_t pos, size_t count, int wait) |
ccd979bd | 2211 | { |
c4c2416a | 2212 | int ret = 0, meta_level = 0, overwrite_io = 0; |
e74540b2 | 2213 | int write_sem = 0; |
b8908236 | 2214 | struct dentry *dentry = file->f_path.dentry; |
2b0143b5 | 2215 | struct inode *inode = d_inode(dentry); |
c4c2416a | 2216 | struct buffer_head *di_bh = NULL; |
e74540b2 SZ |
2217 | u32 cpos; |
2218 | u32 clusters; | |
ccd979bd | 2219 | |
2bd63216 | 2220 | /* |
65ed39d6 MF |
2221 | * We start with a read level meta lock and only jump to an ex |
2222 | * if we need to make modifications here. | |
ccd979bd | 2223 | */ |
ccd979bd | 2224 | for(;;) { |
e74540b2 SZ |
2225 | ret = ocfs2_inode_lock_for_extent_tree(inode, |
2226 | &di_bh, | |
2227 | meta_level, | |
e74540b2 SZ |
2228 | write_sem, |
2229 | wait); | |
ccd979bd | 2230 | if (ret < 0) { |
c4c2416a GH |
2231 | if (ret != -EAGAIN) |
2232 | mlog_errno(ret); | |
ccd979bd MF |
2233 | goto out; |
2234 | } | |
2235 | ||
c4c2416a GH |
2236 | /* |
2237 | * Check if IO will overwrite allocated blocks in case | |
2238 | * IOCB_NOWAIT flag is set. | |
2239 | */ | |
2240 | if (!wait && !overwrite_io) { | |
2241 | overwrite_io = 1; | |
c4c2416a GH |
2242 | |
2243 | ret = ocfs2_overwrite_io(inode, di_bh, pos, count); | |
c4c2416a GH |
2244 | if (ret < 0) { |
2245 | if (ret != -EAGAIN) | |
2246 | mlog_errno(ret); | |
2247 | goto out_unlock; | |
2248 | } | |
2249 | } | |
2250 | ||
ccd979bd MF |
2251 | /* Clear suid / sgid if necessary. We do this here |
2252 | * instead of later in the write path because | |
2253 | * remove_suid() calls ->setattr without any hint that | |
2254 | * we may have already done our cluster locking. Since | |
2255 | * ocfs2_setattr() *must* take cluster locks to | |
42b2aa86 | 2256 | * proceed, this will lead us to recursively lock the |
ccd979bd MF |
2257 | * inode. There's also the dinode i_size state which |
2258 | * can be lost via setattr during extending writes (we | |
2259 | * set inode->i_size at the end of a write. */ | |
8659ac25 | 2260 | if (should_remove_suid(dentry)) { |
ccd979bd | 2261 | if (meta_level == 0) { |
e74540b2 SZ |
2262 | ocfs2_inode_unlock_for_extent_tree(inode, |
2263 | &di_bh, | |
2264 | meta_level, | |
2265 | write_sem); | |
ccd979bd MF |
2266 | meta_level = 1; |
2267 | continue; | |
2268 | } | |
2269 | ||
2270 | ret = ocfs2_write_remove_suid(inode); | |
2271 | if (ret < 0) { | |
2272 | mlog_errno(ret); | |
8659ac25 | 2273 | goto out_unlock; |
ccd979bd MF |
2274 | } |
2275 | } | |
2276 | ||
90320251 | 2277 | ret = ocfs2_check_range_for_refcount(inode, pos, count); |
293b2f70 | 2278 | if (ret == 1) { |
e74540b2 SZ |
2279 | ocfs2_inode_unlock_for_extent_tree(inode, |
2280 | &di_bh, | |
2281 | meta_level, | |
2282 | write_sem); | |
2d797e9f GH |
2283 | meta_level = 1; |
2284 | write_sem = 1; | |
e74540b2 SZ |
2285 | ret = ocfs2_inode_lock_for_extent_tree(inode, |
2286 | &di_bh, | |
2287 | meta_level, | |
2d797e9f | 2288 | write_sem, |
e74540b2 | 2289 | wait); |
e74540b2 SZ |
2290 | if (ret < 0) { |
2291 | if (ret != -EAGAIN) | |
2292 | mlog_errno(ret); | |
2293 | goto out; | |
2294 | } | |
2295 | ||
2296 | cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; | |
2297 | clusters = | |
2298 | ocfs2_clusters_for_bytes(inode->i_sb, pos + count) - cpos; | |
2299 | ret = ocfs2_refcount_cow(inode, di_bh, cpos, clusters, UINT_MAX); | |
293b2f70 TM |
2300 | } |
2301 | ||
2302 | if (ret < 0) { | |
e74540b2 SZ |
2303 | if (ret != -EAGAIN) |
2304 | mlog_errno(ret); | |
293b2f70 TM |
2305 | goto out_unlock; |
2306 | } | |
2307 | ||
ccd979bd MF |
2308 | break; |
2309 | } | |
2310 | ||
8659ac25 | 2311 | out_unlock: |
468eedde | 2312 | trace_ocfs2_prepare_inode_for_write(OCFS2_I(inode)->ip_blkno, |
c4c2416a GH |
2313 | pos, count, wait); |
2314 | ||
e74540b2 SZ |
2315 | ocfs2_inode_unlock_for_extent_tree(inode, |
2316 | &di_bh, | |
2317 | meta_level, | |
2318 | write_sem); | |
8659ac25 TY |
2319 | |
2320 | out: | |
2321 | return ret; | |
2322 | } | |
2323 | ||
3ef045c3 AV |
2324 | static ssize_t ocfs2_file_write_iter(struct kiocb *iocb, |
2325 | struct iov_iter *from) | |
8659ac25 | 2326 | { |
c4c2416a | 2327 | int rw_level; |
9517bac6 | 2328 | ssize_t written = 0; |
3309dd04 | 2329 | ssize_t ret; |
f1f973ff | 2330 | size_t count = iov_iter_count(from); |
9517bac6 | 2331 | struct file *file = iocb->ki_filp; |
496ad9aa | 2332 | struct inode *inode = file_inode(file); |
9ea2d32f | 2333 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
7bdb0d18 TY |
2334 | int full_coherency = !(osb->s_mount_opt & |
2335 | OCFS2_MOUNT_COHERENCY_BUFFERED); | |
e63890f3 | 2336 | void *saved_ki_complete = NULL; |
faaebf18 JQ |
2337 | int append_write = ((iocb->ki_pos + count) >= |
2338 | i_size_read(inode) ? 1 : 0); | |
c4c2416a GH |
2339 | int direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0; |
2340 | int nowait = iocb->ki_flags & IOCB_NOWAIT ? 1 : 0; | |
9517bac6 | 2341 | |
1202d4ba | 2342 | trace_ocfs2_file_write_iter(inode, file, file->f_path.dentry, |
468eedde TM |
2343 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
2344 | file->f_path.dentry->d_name.len, | |
2345 | file->f_path.dentry->d_name.name, | |
3ef045c3 | 2346 | (unsigned int)from->nr_segs); /* GRRRRR */ |
8659ac25 | 2347 | |
c4c2416a GH |
2348 | if (!direct_io && nowait) |
2349 | return -EOPNOTSUPP; | |
2350 | ||
66ee59af | 2351 | if (count == 0) |
8659ac25 TY |
2352 | return 0; |
2353 | ||
c4c2416a GH |
2354 | if (nowait) { |
2355 | if (!inode_trylock(inode)) | |
2356 | return -EAGAIN; | |
2357 | } else | |
2358 | inode_lock(inode); | |
9517bac6 | 2359 | |
7bdb0d18 TY |
2360 | /* |
2361 | * Concurrent O_DIRECT writes are allowed with | |
2362 | * mount_option "coherency=buffered". | |
faaebf18 | 2363 | * For append write, we must take rw EX. |
7bdb0d18 | 2364 | */ |
faaebf18 | 2365 | rw_level = (!direct_io || full_coherency || append_write); |
7bdb0d18 | 2366 | |
c4c2416a GH |
2367 | if (nowait) |
2368 | ret = ocfs2_try_rw_lock(inode, rw_level); | |
2369 | else | |
2370 | ret = ocfs2_rw_lock(inode, rw_level); | |
8659ac25 | 2371 | if (ret < 0) { |
c4c2416a GH |
2372 | if (ret != -EAGAIN) |
2373 | mlog_errno(ret); | |
fa5a0eb3 | 2374 | goto out_mutex; |
8659ac25 TY |
2375 | } |
2376 | ||
7bdb0d18 TY |
2377 | /* |
2378 | * O_DIRECT writes with "coherency=full" need to take EX cluster | |
2379 | * inode_lock to guarantee coherency. | |
2380 | */ | |
2381 | if (direct_io && full_coherency) { | |
2382 | /* | |
2383 | * We need to take and drop the inode lock to force | |
2384 | * other nodes to drop their caches. Buffered I/O | |
2385 | * already does this in write_begin(). | |
2386 | */ | |
c4c2416a GH |
2387 | if (nowait) |
2388 | ret = ocfs2_try_inode_lock(inode, NULL, 1); | |
2389 | else | |
2390 | ret = ocfs2_inode_lock(inode, NULL, 1); | |
7bdb0d18 | 2391 | if (ret < 0) { |
c4c2416a GH |
2392 | if (ret != -EAGAIN) |
2393 | mlog_errno(ret); | |
afe1bb73 | 2394 | goto out; |
7bdb0d18 TY |
2395 | } |
2396 | ||
2397 | ocfs2_inode_unlock(inode, 1); | |
2398 | } | |
2399 | ||
3309dd04 AV |
2400 | ret = generic_write_checks(iocb, from); |
2401 | if (ret <= 0) { | |
2402 | if (ret) | |
2403 | mlog_errno(ret); | |
90320251 AV |
2404 | goto out; |
2405 | } | |
3309dd04 | 2406 | count = ret; |
90320251 | 2407 | |
c4c2416a | 2408 | ret = ocfs2_prepare_inode_for_write(file, iocb->ki_pos, count, !nowait); |
8659ac25 | 2409 | if (ret < 0) { |
c4c2416a GH |
2410 | if (ret != -EAGAIN) |
2411 | mlog_errno(ret); | |
8659ac25 TY |
2412 | goto out; |
2413 | } | |
ccd979bd | 2414 | |
e63890f3 RD |
2415 | if (direct_io && !is_sync_kiocb(iocb) && |
2416 | ocfs2_is_io_unaligned(inode, count, iocb->ki_pos)) { | |
a11f7e63 | 2417 | /* |
e63890f3 | 2418 | * Make it a sync io if it's an unaligned aio. |
a11f7e63 | 2419 | */ |
e63890f3 | 2420 | saved_ki_complete = xchg(&iocb->ki_complete, NULL); |
a11f7e63 MF |
2421 | } |
2422 | ||
ccd979bd | 2423 | /* communicate with ocfs2_dio_end_io */ |
7cdfc3a1 | 2424 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd | 2425 | |
7da839c4 | 2426 | written = __generic_file_write_iter(iocb, from); |
ccd979bd | 2427 | /* buffered aio wouldn't have proper lock coverage today */ |
9e985787 | 2428 | BUG_ON(written == -EIOCBQUEUED && !direct_io); |
ccd979bd | 2429 | |
aa1057b3 RD |
2430 | /* |
2431 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io | |
2432 | * function pointer which is called when o_direct io completes so that | |
2433 | * it can unlock our rw lock. | |
2434 | * Unfortunately there are error cases which call end_io and others | |
2435 | * that don't. so we don't have to unlock the rw_lock if either an | |
2436 | * async dio is going to do it in the future or an end_io after an | |
2437 | * error has already done it. | |
2438 | */ | |
2439 | if ((written == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { | |
2440 | rw_level = -1; | |
aa1057b3 RD |
2441 | } |
2442 | ||
64b4e252 | 2443 | if (unlikely(written <= 0)) |
e63890f3 | 2444 | goto out; |
64b4e252 | 2445 | |
7da839c4 | 2446 | if (((file->f_flags & O_DSYNC) && !direct_io) || |
f1f973ff | 2447 | IS_SYNC(inode)) { |
64b4e252 AV |
2448 | ret = filemap_fdatawrite_range(file->f_mapping, |
2449 | iocb->ki_pos - written, | |
2450 | iocb->ki_pos - 1); | |
918941a3 JK |
2451 | if (ret < 0) |
2452 | written = ret; | |
2453 | ||
86b9c6f3 | 2454 | if (!ret) { |
2b4e30fb | 2455 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
9ea2d32f MF |
2456 | if (ret < 0) |
2457 | written = ret; | |
2458 | } | |
918941a3 JK |
2459 | |
2460 | if (!ret) | |
64b4e252 AV |
2461 | ret = filemap_fdatawait_range(file->f_mapping, |
2462 | iocb->ki_pos - written, | |
2463 | iocb->ki_pos - 1); | |
9ea2d32f MF |
2464 | } |
2465 | ||
ccd979bd | 2466 | out: |
e63890f3 RD |
2467 | if (saved_ki_complete) |
2468 | xchg(&iocb->ki_complete, saved_ki_complete); | |
2469 | ||
9517bac6 MF |
2470 | if (rw_level != -1) |
2471 | ocfs2_rw_unlock(inode, rw_level); | |
2472 | ||
fa5a0eb3 | 2473 | out_mutex: |
5955102c | 2474 | inode_unlock(inode); |
ccd979bd | 2475 | |
812e7a6a WW |
2476 | if (written) |
2477 | ret = written; | |
812e7a6a | 2478 | return ret; |
ccd979bd MF |
2479 | } |
2480 | ||
3cd9ad5a AV |
2481 | static ssize_t ocfs2_file_read_iter(struct kiocb *iocb, |
2482 | struct iov_iter *to) | |
ccd979bd | 2483 | { |
fa5a0eb3 | 2484 | int ret = 0, rw_level = -1, lock_level = 0; |
ccd979bd | 2485 | struct file *filp = iocb->ki_filp; |
496ad9aa | 2486 | struct inode *inode = file_inode(filp); |
c4c2416a GH |
2487 | int direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0; |
2488 | int nowait = iocb->ki_flags & IOCB_NOWAIT ? 1 : 0; | |
ccd979bd | 2489 | |
1202d4ba | 2490 | trace_ocfs2_file_read_iter(inode, filp, filp->f_path.dentry, |
468eedde TM |
2491 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
2492 | filp->f_path.dentry->d_name.len, | |
3cd9ad5a AV |
2493 | filp->f_path.dentry->d_name.name, |
2494 | to->nr_segs); /* GRRRRR */ | |
468eedde | 2495 | |
ccd979bd MF |
2496 | |
2497 | if (!inode) { | |
2498 | ret = -EINVAL; | |
2499 | mlog_errno(ret); | |
2500 | goto bail; | |
2501 | } | |
2502 | ||
c4c2416a GH |
2503 | if (!direct_io && nowait) |
2504 | return -EOPNOTSUPP; | |
2505 | ||
2bd63216 | 2506 | /* |
ccd979bd MF |
2507 | * buffered reads protect themselves in ->readpage(). O_DIRECT reads |
2508 | * need locks to protect pending reads from racing with truncate. | |
2509 | */ | |
c4c2416a GH |
2510 | if (direct_io) { |
2511 | if (nowait) | |
2512 | ret = ocfs2_try_rw_lock(inode, 0); | |
2513 | else | |
2514 | ret = ocfs2_rw_lock(inode, 0); | |
2515 | ||
ccd979bd | 2516 | if (ret < 0) { |
c4c2416a GH |
2517 | if (ret != -EAGAIN) |
2518 | mlog_errno(ret); | |
ccd979bd MF |
2519 | goto bail; |
2520 | } | |
2521 | rw_level = 0; | |
2522 | /* communicate with ocfs2_dio_end_io */ | |
7cdfc3a1 | 2523 | ocfs2_iocb_set_rw_locked(iocb, rw_level); |
ccd979bd MF |
2524 | } |
2525 | ||
c4374f8a MF |
2526 | /* |
2527 | * We're fine letting folks race truncates and extending | |
2528 | * writes with read across the cluster, just like they can | |
2529 | * locally. Hence no rw_lock during read. | |
2bd63216 | 2530 | * |
c4374f8a MF |
2531 | * Take and drop the meta data lock to update inode fields |
2532 | * like i_size. This allows the checks down below | |
1202d4ba | 2533 | * generic_file_read_iter() a chance of actually working. |
c4374f8a | 2534 | */ |
c4c2416a GH |
2535 | ret = ocfs2_inode_lock_atime(inode, filp->f_path.mnt, &lock_level, |
2536 | !nowait); | |
c4374f8a | 2537 | if (ret < 0) { |
c4c2416a GH |
2538 | if (ret != -EAGAIN) |
2539 | mlog_errno(ret); | |
c4374f8a MF |
2540 | goto bail; |
2541 | } | |
e63aecb6 | 2542 | ocfs2_inode_unlock(inode, lock_level); |
c4374f8a | 2543 | |
3cd9ad5a | 2544 | ret = generic_file_read_iter(iocb, to); |
1202d4ba | 2545 | trace_generic_file_read_iter_ret(ret); |
ccd979bd MF |
2546 | |
2547 | /* buffered aio wouldn't have proper lock coverage today */ | |
9e985787 | 2548 | BUG_ON(ret == -EIOCBQUEUED && !direct_io); |
ccd979bd | 2549 | |
3ef045c3 | 2550 | /* see ocfs2_file_write_iter */ |
ccd979bd MF |
2551 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
2552 | rw_level = -1; | |
ccd979bd MF |
2553 | } |
2554 | ||
2555 | bail: | |
2bd63216 | 2556 | if (rw_level != -1) |
ccd979bd | 2557 | ocfs2_rw_unlock(inode, rw_level); |
ccd979bd MF |
2558 | |
2559 | return ret; | |
2560 | } | |
2561 | ||
93862d5e | 2562 | /* Refer generic_file_llseek_unlocked() */ |
965c8e59 | 2563 | static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence) |
93862d5e SM |
2564 | { |
2565 | struct inode *inode = file->f_mapping->host; | |
2566 | int ret = 0; | |
2567 | ||
5955102c | 2568 | inode_lock(inode); |
93862d5e | 2569 | |
965c8e59 | 2570 | switch (whence) { |
93862d5e SM |
2571 | case SEEK_SET: |
2572 | break; | |
2573 | case SEEK_END: | |
c8d888d9 J |
2574 | /* SEEK_END requires the OCFS2 inode lock for the file |
2575 | * because it references the file's size. | |
2576 | */ | |
2577 | ret = ocfs2_inode_lock(inode, NULL, 0); | |
2578 | if (ret < 0) { | |
2579 | mlog_errno(ret); | |
2580 | goto out; | |
2581 | } | |
2582 | offset += i_size_read(inode); | |
2583 | ocfs2_inode_unlock(inode, 0); | |
93862d5e SM |
2584 | break; |
2585 | case SEEK_CUR: | |
2586 | if (offset == 0) { | |
2587 | offset = file->f_pos; | |
2588 | goto out; | |
2589 | } | |
2590 | offset += file->f_pos; | |
2591 | break; | |
2592 | case SEEK_DATA: | |
2593 | case SEEK_HOLE: | |
965c8e59 | 2594 | ret = ocfs2_seek_data_hole_offset(file, &offset, whence); |
93862d5e SM |
2595 | if (ret) |
2596 | goto out; | |
2597 | break; | |
2598 | default: | |
2599 | ret = -EINVAL; | |
2600 | goto out; | |
2601 | } | |
2602 | ||
46a1c2c7 | 2603 | offset = vfs_setpos(file, offset, inode->i_sb->s_maxbytes); |
93862d5e SM |
2604 | |
2605 | out: | |
5955102c | 2606 | inode_unlock(inode); |
93862d5e SM |
2607 | if (ret) |
2608 | return ret; | |
2609 | return offset; | |
2610 | } | |
2611 | ||
42ec3d4c DW |
2612 | static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in, |
2613 | struct file *file_out, loff_t pos_out, | |
2614 | loff_t len, unsigned int remap_flags) | |
29ac8e85 | 2615 | { |
65f098e9 DW |
2616 | struct inode *inode_in = file_inode(file_in); |
2617 | struct inode *inode_out = file_inode(file_out); | |
2618 | struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb); | |
2619 | struct buffer_head *in_bh = NULL, *out_bh = NULL; | |
2620 | bool same_inode = (inode_in == inode_out); | |
2621 | loff_t remapped = 0; | |
2622 | ssize_t ret; | |
2623 | ||
2e5dfc99 DW |
2624 | if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY)) |
2625 | return -EINVAL; | |
65f098e9 DW |
2626 | if (!ocfs2_refcount_tree(osb)) |
2627 | return -EOPNOTSUPP; | |
2628 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) | |
2629 | return -EROFS; | |
29ac8e85 | 2630 | |
65f098e9 DW |
2631 | /* Lock both files against IO */ |
2632 | ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh); | |
2633 | if (ret) | |
2634 | return ret; | |
2635 | ||
2636 | /* Check file eligibility and prepare for block sharing. */ | |
2637 | ret = -EINVAL; | |
2638 | if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) || | |
2639 | (OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE)) | |
2640 | goto out_unlock; | |
2641 | ||
2642 | ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out, | |
2643 | &len, remap_flags); | |
2644 | if (ret < 0 || len == 0) | |
2645 | goto out_unlock; | |
2646 | ||
2647 | /* Lock out changes to the allocation maps and remap. */ | |
2648 | down_write(&OCFS2_I(inode_in)->ip_alloc_sem); | |
2649 | if (!same_inode) | |
2650 | down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem, | |
2651 | SINGLE_DEPTH_NESTING); | |
2652 | ||
2653 | /* Zap any page cache for the destination file's range. */ | |
2654 | truncate_inode_pages_range(&inode_out->i_data, | |
2655 | round_down(pos_out, PAGE_SIZE), | |
2656 | round_up(pos_out + len, PAGE_SIZE) - 1); | |
2657 | ||
2658 | remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in, | |
2659 | inode_out, out_bh, pos_out, len); | |
2660 | up_write(&OCFS2_I(inode_in)->ip_alloc_sem); | |
2661 | if (!same_inode) | |
2662 | up_write(&OCFS2_I(inode_out)->ip_alloc_sem); | |
2663 | if (remapped < 0) { | |
2664 | ret = remapped; | |
2665 | mlog_errno(ret); | |
2666 | goto out_unlock; | |
2667 | } | |
2668 | ||
2669 | /* | |
2670 | * Empty the extent map so that we may get the right extent | |
2671 | * record from the disk. | |
2672 | */ | |
2673 | ocfs2_extent_map_trunc(inode_in, 0); | |
2674 | ocfs2_extent_map_trunc(inode_out, 0); | |
2675 | ||
2676 | ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len); | |
2677 | if (ret) { | |
2678 | mlog_errno(ret); | |
2679 | goto out_unlock; | |
2680 | } | |
2681 | ||
2682 | out_unlock: | |
2683 | ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh); | |
2684 | return remapped > 0 ? remapped : ret; | |
29ac8e85 DW |
2685 | } |
2686 | ||
92e1d5be | 2687 | const struct inode_operations ocfs2_file_iops = { |
ccd979bd MF |
2688 | .setattr = ocfs2_setattr, |
2689 | .getattr = ocfs2_getattr, | |
d38eb8db | 2690 | .permission = ocfs2_permission, |
cf1d6c76 | 2691 | .listxattr = ocfs2_listxattr, |
00dc417f | 2692 | .fiemap = ocfs2_fiemap, |
4e34e719 | 2693 | .get_acl = ocfs2_iop_get_acl, |
702e5bc6 | 2694 | .set_acl = ocfs2_iop_set_acl, |
2b5f52c5 MS |
2695 | .fileattr_get = ocfs2_fileattr_get, |
2696 | .fileattr_set = ocfs2_fileattr_set, | |
ccd979bd MF |
2697 | }; |
2698 | ||
92e1d5be | 2699 | const struct inode_operations ocfs2_special_file_iops = { |
ccd979bd MF |
2700 | .setattr = ocfs2_setattr, |
2701 | .getattr = ocfs2_getattr, | |
d38eb8db | 2702 | .permission = ocfs2_permission, |
4e34e719 | 2703 | .get_acl = ocfs2_iop_get_acl, |
702e5bc6 | 2704 | .set_acl = ocfs2_iop_set_acl, |
ccd979bd MF |
2705 | }; |
2706 | ||
53da4939 MF |
2707 | /* |
2708 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with | |
2709 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! | |
2710 | */ | |
4b6f5d20 | 2711 | const struct file_operations ocfs2_fops = { |
93862d5e | 2712 | .llseek = ocfs2_file_llseek, |
ccd979bd MF |
2713 | .mmap = ocfs2_mmap, |
2714 | .fsync = ocfs2_sync_file, | |
2715 | .release = ocfs2_file_release, | |
2716 | .open = ocfs2_file_open, | |
3cd9ad5a | 2717 | .read_iter = ocfs2_file_read_iter, |
3ef045c3 | 2718 | .write_iter = ocfs2_file_write_iter, |
c9ec1488 | 2719 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2720 | #ifdef CONFIG_COMPAT |
2721 | .compat_ioctl = ocfs2_compat_ioctl, | |
2722 | #endif | |
53da4939 | 2723 | .lock = ocfs2_lock, |
53fc622b | 2724 | .flock = ocfs2_flock, |
82c156f8 | 2725 | .splice_read = generic_file_splice_read, |
6dc8bc0f | 2726 | .splice_write = iter_file_splice_write, |
2fe17c10 | 2727 | .fallocate = ocfs2_fallocate, |
2e5dfc99 | 2728 | .remap_file_range = ocfs2_remap_file_range, |
ccd979bd MF |
2729 | }; |
2730 | ||
4b6f5d20 | 2731 | const struct file_operations ocfs2_dops = { |
32c3c0e2 | 2732 | .llseek = generic_file_llseek, |
ccd979bd | 2733 | .read = generic_read_dir, |
3704412b | 2734 | .iterate = ocfs2_readdir, |
ccd979bd | 2735 | .fsync = ocfs2_sync_file, |
53fc622b MF |
2736 | .release = ocfs2_dir_release, |
2737 | .open = ocfs2_dir_open, | |
c9ec1488 | 2738 | .unlocked_ioctl = ocfs2_ioctl, |
586d232b MF |
2739 | #ifdef CONFIG_COMPAT |
2740 | .compat_ioctl = ocfs2_compat_ioctl, | |
53da4939 MF |
2741 | #endif |
2742 | .lock = ocfs2_lock, | |
2743 | .flock = ocfs2_flock, | |
2744 | }; | |
2745 | ||
2746 | /* | |
2747 | * POSIX-lockless variants of our file_operations. | |
2748 | * | |
2749 | * These will be used if the underlying cluster stack does not support | |
2750 | * posix file locking, if the user passes the "localflocks" mount | |
2751 | * option, or if we have a local-only fs. | |
2752 | * | |
2753 | * ocfs2_flock is in here because all stacks handle UNIX file locks, | |
2754 | * so we still want it in the case of no stack support for | |
2755 | * plocks. Internally, it will do the right thing when asked to ignore | |
2756 | * the cluster. | |
2757 | */ | |
2758 | const struct file_operations ocfs2_fops_no_plocks = { | |
93862d5e | 2759 | .llseek = ocfs2_file_llseek, |
53da4939 MF |
2760 | .mmap = ocfs2_mmap, |
2761 | .fsync = ocfs2_sync_file, | |
2762 | .release = ocfs2_file_release, | |
2763 | .open = ocfs2_file_open, | |
3cd9ad5a | 2764 | .read_iter = ocfs2_file_read_iter, |
3ef045c3 | 2765 | .write_iter = ocfs2_file_write_iter, |
53da4939 MF |
2766 | .unlocked_ioctl = ocfs2_ioctl, |
2767 | #ifdef CONFIG_COMPAT | |
2768 | .compat_ioctl = ocfs2_compat_ioctl, | |
2769 | #endif | |
2770 | .flock = ocfs2_flock, | |
82c156f8 | 2771 | .splice_read = generic_file_splice_read, |
6dc8bc0f | 2772 | .splice_write = iter_file_splice_write, |
3d1c1829 | 2773 | .fallocate = ocfs2_fallocate, |
2e5dfc99 | 2774 | .remap_file_range = ocfs2_remap_file_range, |
53da4939 MF |
2775 | }; |
2776 | ||
2777 | const struct file_operations ocfs2_dops_no_plocks = { | |
2778 | .llseek = generic_file_llseek, | |
2779 | .read = generic_read_dir, | |
3704412b | 2780 | .iterate = ocfs2_readdir, |
53da4939 MF |
2781 | .fsync = ocfs2_sync_file, |
2782 | .release = ocfs2_dir_release, | |
2783 | .open = ocfs2_dir_open, | |
2784 | .unlocked_ioctl = ocfs2_ioctl, | |
2785 | #ifdef CONFIG_COMPAT | |
2786 | .compat_ioctl = ocfs2_compat_ioctl, | |
586d232b | 2787 | #endif |
53fc622b | 2788 | .flock = ocfs2_flock, |
ccd979bd | 2789 | }; |