1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * file.c |
4 | * |
5 | * File open, close, extend, truncate |
6 | * |
7 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
8 | */ |
9 | |
10 | #include <linux/capability.h> |
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> |
17 | #include <linux/sched.h> |
18 | #include <linux/splice.h> |
19 | #include <linux/mount.h> |
20 | #include <linux/writeback.h> |
21 | #include <linux/falloc.h> |
22 | #include <linux/quotaops.h> |
23 | #include <linux/blkdev.h> |
24 | #include <linux/backing-dev.h> |
25 | |
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" |
38 | #include "ioctl.h" |
39 | #include "journal.h" |
40 | #include "locks.h" |
41 | #include "mmap.h" |
42 | #include "suballoc.h" |
43 | #include "super.h" |
44 | #include "xattr.h" |
45 | #include "acl.h" |
46 | #include "quota.h" |
47 | #include "refcounttree.h" |
48 | #include "ocfs2_trace.h" |
49 | |
50 | #include "buffer_head_io.h" |
51 | |
52 | static int ocfs2_init_file_private(struct inode *inode, struct file *file) |
53 | { |
54 | struct ocfs2_file_private *fp; |
55 | |
56 | fp = kzalloc(size: 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(lockres: &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, lockres: &fp->fp_flock); |
75 | ocfs2_lock_res_free(res: &fp->fp_flock); |
76 | kfree(objp: fp); |
77 | file->private_data = NULL; |
78 | } |
79 | } |
80 | |
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 | |
87 | trace_ocfs2_file_open(inode, file, dentry: file->f_path.dentry, |
88 | ino: (unsigned long long)oi->ip_blkno, |
89 | d_len: file->f_path.dentry->d_name.len, |
90 | d_name: file->f_path.dentry->d_name.name, mode); |
91 | |
92 | if (file->f_mode & FMODE_WRITE) { |
93 | status = dquot_initialize(inode); |
94 | if (status) |
95 | goto leave; |
96 | } |
97 | |
98 | spin_lock(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. */ |
103 | if (oi->ip_flags & OCFS2_INODE_DELETED) { |
104 | spin_unlock(lock: &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(lock: &oi->ip_lock); |
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(lock: &oi->ip_lock); |
123 | oi->ip_open_count--; |
124 | spin_unlock(lock: &oi->ip_lock); |
125 | } |
126 | |
127 | file->f_mode |= FMODE_NOWAIT; |
128 | |
129 | leave: |
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 | |
137 | spin_lock(lock: &oi->ip_lock); |
138 | if (!--oi->ip_open_count) |
139 | oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT; |
140 | |
141 | trace_ocfs2_file_release(inode, file, dentry: file->f_path.dentry, |
142 | ino: oi->ip_blkno, |
143 | d_len: file->f_path.dentry->d_name.len, |
144 | d_name: file->f_path.dentry->d_name.name, |
145 | mode: oi->ip_open_count); |
146 | spin_unlock(lock: &oi->ip_lock); |
147 | |
148 | ocfs2_free_file_private(inode, file); |
149 | |
150 | return 0; |
151 | } |
152 | |
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 | |
164 | static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end, |
165 | int datasync) |
166 | { |
167 | int err = 0; |
168 | struct inode *inode = file->f_mapping->host; |
169 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
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; |
175 | |
176 | trace_ocfs2_sync_file(inode, file, dentry: file->f_path.dentry, |
177 | ino: oi->ip_blkno, |
178 | d_len: file->f_path.dentry->d_name.len, |
179 | d_name: file->f_path.dentry->d_name.name, |
180 | mode: (unsigned long long)datasync); |
181 | |
182 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
183 | return -EROFS; |
184 | |
185 | err = file_write_and_wait_range(file, start, end); |
186 | if (err) |
187 | return err; |
188 | |
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, tid: commit_tid)) |
192 | needs_barrier = true; |
193 | err = jbd2_complete_transaction(journal, tid: commit_tid); |
194 | if (needs_barrier) { |
195 | ret = blkdev_issue_flush(bdev: inode->i_sb->s_bdev); |
196 | if (!err) |
197 | err = ret; |
198 | } |
199 | |
200 | if (err) |
201 | mlog_errno(err); |
202 | |
203 | return (err < 0) ? -EIO : 0; |
204 | } |
205 | |
206 | int ocfs2_should_update_atime(struct inode *inode, |
207 | struct vfsmount *vfsmnt) |
208 | { |
209 | struct timespec64 now; |
210 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
211 | |
212 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
213 | return 0; |
214 | |
215 | if ((inode->i_flags & S_NOATIME) || |
216 | ((inode->i_sb->s_flags & SB_NODIRATIME) && S_ISDIR(inode->i_mode))) |
217 | return 0; |
218 | |
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 | |
230 | if ((vfsmnt->mnt_flags & MNT_NOATIME) || |
231 | ((vfsmnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
232 | return 0; |
233 | |
234 | if (vfsmnt->mnt_flags & MNT_RELATIME) { |
235 | struct timespec64 ctime = inode_get_ctime(inode); |
236 | struct timespec64 atime = inode_get_atime(inode); |
237 | struct timespec64 mtime = inode_get_mtime(inode); |
238 | |
239 | if ((timespec64_compare(lhs: &atime, rhs: &mtime) <= 0) || |
240 | (timespec64_compare(lhs: &atime, rhs: &ctime) <= 0)) |
241 | return 1; |
242 | |
243 | return 0; |
244 | } |
245 | |
246 | now = current_time(inode); |
247 | if ((now.tv_sec - inode_get_atime_sec(inode) <= osb->s_atime_quantum)) |
248 | return 0; |
249 | else |
250 | return 1; |
251 | } |
252 | |
253 | int ocfs2_update_inode_atime(struct inode *inode, |
254 | struct buffer_head *bh) |
255 | { |
256 | int ret; |
257 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
258 | handle_t *handle; |
259 | struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data; |
260 | |
261 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
262 | if (IS_ERR(ptr: handle)) { |
263 | ret = PTR_ERR(ptr: handle); |
264 | mlog_errno(ret); |
265 | goto out; |
266 | } |
267 | |
268 | ret = ocfs2_journal_access_di(handle, ci: INODE_CACHE(inode), bh, |
269 | OCFS2_JOURNAL_ACCESS_WRITE); |
270 | if (ret) { |
271 | mlog_errno(ret); |
272 | goto out_commit; |
273 | } |
274 | |
275 | /* |
276 | * Don't use ocfs2_mark_inode_dirty() here as we don't always |
277 | * have i_rwsem to guard against concurrent changes to other |
278 | * inode fields. |
279 | */ |
280 | inode_set_atime_to_ts(inode, ts: current_time(inode)); |
281 | di->i_atime = cpu_to_le64(inode_get_atime_sec(inode)); |
282 | di->i_atime_nsec = cpu_to_le32(inode_get_atime_nsec(inode)); |
283 | ocfs2_update_inode_fsync_trans(handle, inode, datasync: 0); |
284 | ocfs2_journal_dirty(handle, bh); |
285 | |
286 | out_commit: |
287 | ocfs2_commit_trans(osb, handle); |
288 | out: |
289 | return ret; |
290 | } |
291 | |
292 | int ocfs2_set_inode_size(handle_t *handle, |
293 | struct inode *inode, |
294 | struct buffer_head *fe_bh, |
295 | u64 new_i_size) |
296 | { |
297 | int status; |
298 | |
299 | i_size_write(inode, i_size: new_i_size); |
300 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
301 | inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode)); |
302 | |
303 | status = ocfs2_mark_inode_dirty(handle, inode, bh: fe_bh); |
304 | if (status < 0) { |
305 | mlog_errno(status); |
306 | goto bail; |
307 | } |
308 | |
309 | bail: |
310 | return status; |
311 | } |
312 | |
313 | int ocfs2_simple_size_update(struct inode *inode, |
314 | struct buffer_head *di_bh, |
315 | u64 new_i_size) |
316 | { |
317 | int ret; |
318 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
319 | handle_t *handle = NULL; |
320 | |
321 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
322 | if (IS_ERR(ptr: handle)) { |
323 | ret = PTR_ERR(ptr: handle); |
324 | mlog_errno(ret); |
325 | goto out; |
326 | } |
327 | |
328 | ret = ocfs2_set_inode_size(handle, inode, fe_bh: di_bh, |
329 | new_i_size); |
330 | if (ret < 0) |
331 | mlog_errno(ret); |
332 | |
333 | ocfs2_update_inode_fsync_trans(handle, inode, datasync: 0); |
334 | ocfs2_commit_trans(osb, handle); |
335 | out: |
336 | return ret; |
337 | } |
338 | |
339 | static int ocfs2_cow_file_pos(struct inode *inode, |
340 | struct buffer_head *fe_bh, |
341 | u64 offset) |
342 | { |
343 | int status; |
344 | u32 phys, cpos = offset >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
345 | unsigned int num_clusters = 0; |
346 | unsigned int ext_flags = 0; |
347 | |
348 | /* |
349 | * If the new offset is aligned to the range of the cluster, there is |
350 | * no space for ocfs2_zero_range_for_truncate to fill, so no need to |
351 | * CoW either. |
352 | */ |
353 | if ((offset & (OCFS2_SB(inode->i_sb)->s_clustersize - 1)) == 0) |
354 | return 0; |
355 | |
356 | status = ocfs2_get_clusters(inode, v_cluster: cpos, p_cluster: &phys, |
357 | num_clusters: &num_clusters, extent_flags: &ext_flags); |
358 | if (status) { |
359 | mlog_errno(status); |
360 | goto out; |
361 | } |
362 | |
363 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) |
364 | goto out; |
365 | |
366 | return ocfs2_refcount_cow(inode, di_bh: fe_bh, cpos, write_len: 1, max_cpos: cpos+1); |
367 | |
368 | out: |
369 | return status; |
370 | } |
371 | |
372 | static int ocfs2_orphan_for_truncate(struct ocfs2_super *osb, |
373 | struct inode *inode, |
374 | struct buffer_head *fe_bh, |
375 | u64 new_i_size) |
376 | { |
377 | int status; |
378 | handle_t *handle; |
379 | struct ocfs2_dinode *di; |
380 | u64 cluster_bytes; |
381 | |
382 | /* |
383 | * We need to CoW the cluster contains the offset if it is reflinked |
384 | * since we will call ocfs2_zero_range_for_truncate later which will |
385 | * write "0" from offset to the end of the cluster. |
386 | */ |
387 | status = ocfs2_cow_file_pos(inode, fe_bh, offset: new_i_size); |
388 | if (status) { |
389 | mlog_errno(status); |
390 | return status; |
391 | } |
392 | |
393 | /* TODO: This needs to actually orphan the inode in this |
394 | * transaction. */ |
395 | |
396 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
397 | if (IS_ERR(ptr: handle)) { |
398 | status = PTR_ERR(ptr: handle); |
399 | mlog_errno(status); |
400 | goto out; |
401 | } |
402 | |
403 | status = ocfs2_journal_access_di(handle, ci: INODE_CACHE(inode), bh: fe_bh, |
404 | OCFS2_JOURNAL_ACCESS_WRITE); |
405 | if (status < 0) { |
406 | mlog_errno(status); |
407 | goto out_commit; |
408 | } |
409 | |
410 | /* |
411 | * Do this before setting i_size. |
412 | */ |
413 | cluster_bytes = ocfs2_align_bytes_to_clusters(sb: inode->i_sb, bytes: new_i_size); |
414 | status = ocfs2_zero_range_for_truncate(inode, handle, range_start: new_i_size, |
415 | range_end: cluster_bytes); |
416 | if (status) { |
417 | mlog_errno(status); |
418 | goto out_commit; |
419 | } |
420 | |
421 | i_size_write(inode, i_size: new_i_size); |
422 | inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode)); |
423 | |
424 | di = (struct ocfs2_dinode *) fe_bh->b_data; |
425 | di->i_size = cpu_to_le64(new_i_size); |
426 | di->i_ctime = di->i_mtime = cpu_to_le64(inode_get_ctime_sec(inode)); |
427 | di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode)); |
428 | ocfs2_update_inode_fsync_trans(handle, inode, datasync: 0); |
429 | |
430 | ocfs2_journal_dirty(handle, bh: fe_bh); |
431 | |
432 | out_commit: |
433 | ocfs2_commit_trans(osb, handle); |
434 | out: |
435 | return status; |
436 | } |
437 | |
438 | int ocfs2_truncate_file(struct inode *inode, |
439 | struct buffer_head *di_bh, |
440 | u64 new_i_size) |
441 | { |
442 | int status = 0; |
443 | struct ocfs2_dinode *fe = NULL; |
444 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
445 | |
446 | /* We trust di_bh because it comes from ocfs2_inode_lock(), which |
447 | * already validated it */ |
448 | fe = (struct ocfs2_dinode *) di_bh->b_data; |
449 | |
450 | trace_ocfs2_truncate_file(value1: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
451 | value2: (unsigned long long)le64_to_cpu(fe->i_size), |
452 | value3: (unsigned long long)new_i_size); |
453 | |
454 | mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode), |
455 | "Inode %llu, inode i_size = %lld != di " |
456 | "i_size = %llu, i_flags = 0x%x\n" , |
457 | (unsigned long long)OCFS2_I(inode)->ip_blkno, |
458 | i_size_read(inode), |
459 | (unsigned long long)le64_to_cpu(fe->i_size), |
460 | le32_to_cpu(fe->i_flags)); |
461 | |
462 | if (new_i_size > le64_to_cpu(fe->i_size)) { |
463 | trace_ocfs2_truncate_file_error( |
464 | val1: (unsigned long long)le64_to_cpu(fe->i_size), |
465 | val2: (unsigned long long)new_i_size); |
466 | status = -EINVAL; |
467 | mlog_errno(status); |
468 | goto bail; |
469 | } |
470 | |
471 | down_write(sem: &OCFS2_I(inode)->ip_alloc_sem); |
472 | |
473 | ocfs2_resv_discard(resmap: &osb->osb_la_resmap, |
474 | resv: &OCFS2_I(inode)->ip_la_data_resv); |
475 | |
476 | /* |
477 | * The inode lock forced other nodes to sync and drop their |
478 | * pages, which (correctly) happens even if we have a truncate |
479 | * without allocation change - ocfs2 cluster sizes can be much |
480 | * greater than page size, so we have to truncate them |
481 | * anyway. |
482 | */ |
483 | |
484 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
485 | unmap_mapping_range(mapping: inode->i_mapping, |
486 | holebegin: new_i_size + PAGE_SIZE - 1, holelen: 0, even_cows: 1); |
487 | truncate_inode_pages(inode->i_mapping, new_i_size); |
488 | status = ocfs2_truncate_inline(inode, di_bh, start: new_i_size, |
489 | end: i_size_read(inode), trunc: 1); |
490 | if (status) |
491 | mlog_errno(status); |
492 | |
493 | goto bail_unlock_sem; |
494 | } |
495 | |
496 | /* alright, we're going to need to do a full blown alloc size |
497 | * change. Orphan the inode so that recovery can complete the |
498 | * truncate if necessary. This does the task of marking |
499 | * i_size. */ |
500 | status = ocfs2_orphan_for_truncate(osb, inode, fe_bh: di_bh, new_i_size); |
501 | if (status < 0) { |
502 | mlog_errno(status); |
503 | goto bail_unlock_sem; |
504 | } |
505 | |
506 | unmap_mapping_range(mapping: inode->i_mapping, holebegin: new_i_size + PAGE_SIZE - 1, holelen: 0, even_cows: 1); |
507 | truncate_inode_pages(inode->i_mapping, new_i_size); |
508 | |
509 | status = ocfs2_commit_truncate(osb, inode, di_bh); |
510 | if (status < 0) { |
511 | mlog_errno(status); |
512 | goto bail_unlock_sem; |
513 | } |
514 | |
515 | /* TODO: orphan dir cleanup here. */ |
516 | bail_unlock_sem: |
517 | up_write(sem: &OCFS2_I(inode)->ip_alloc_sem); |
518 | |
519 | bail: |
520 | if (!status && OCFS2_I(inode)->ip_clusters == 0) |
521 | status = ocfs2_try_remove_refcount_tree(inode, di_bh); |
522 | |
523 | return status; |
524 | } |
525 | |
526 | /* |
527 | * extend file allocation only here. |
528 | * we'll update all the disk stuff, and oip->alloc_size |
529 | * |
530 | * expect stuff to be locked, a transaction started and enough data / |
531 | * metadata reservations in the contexts. |
532 | * |
533 | * Will return -EAGAIN, and a reason if a restart is needed. |
534 | * If passed in, *reason will always be set, even in error. |
535 | */ |
536 | int ocfs2_add_inode_data(struct ocfs2_super *osb, |
537 | struct inode *inode, |
538 | u32 *logical_offset, |
539 | u32 clusters_to_add, |
540 | int mark_unwritten, |
541 | struct buffer_head *fe_bh, |
542 | handle_t *handle, |
543 | struct ocfs2_alloc_context *data_ac, |
544 | struct ocfs2_alloc_context *meta_ac, |
545 | enum ocfs2_alloc_restarted *reason_ret) |
546 | { |
547 | struct ocfs2_extent_tree et; |
548 | |
549 | ocfs2_init_dinode_extent_tree(et: &et, ci: INODE_CACHE(inode), bh: fe_bh); |
550 | return ocfs2_add_clusters_in_btree(handle, et: &et, logical_offset, |
551 | clusters_to_add, mark_unwritten, |
552 | data_ac, meta_ac, reason_ret); |
553 | } |
554 | |
555 | static int ocfs2_extend_allocation(struct inode *inode, u32 logical_start, |
556 | u32 clusters_to_add, int mark_unwritten) |
557 | { |
558 | int status = 0; |
559 | int restart_func = 0; |
560 | int credits; |
561 | u32 prev_clusters; |
562 | struct buffer_head *bh = NULL; |
563 | struct ocfs2_dinode *fe = NULL; |
564 | handle_t *handle = NULL; |
565 | struct ocfs2_alloc_context *data_ac = NULL; |
566 | struct ocfs2_alloc_context *meta_ac = NULL; |
567 | enum ocfs2_alloc_restarted why = RESTART_NONE; |
568 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
569 | struct ocfs2_extent_tree et; |
570 | int did_quota = 0; |
571 | |
572 | /* |
573 | * Unwritten extent only exists for file systems which |
574 | * support holes. |
575 | */ |
576 | BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb)); |
577 | |
578 | status = ocfs2_read_inode_block(inode, bh: &bh); |
579 | if (status < 0) { |
580 | mlog_errno(status); |
581 | goto leave; |
582 | } |
583 | fe = (struct ocfs2_dinode *) bh->b_data; |
584 | |
585 | restart_all: |
586 | BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters); |
587 | |
588 | ocfs2_init_dinode_extent_tree(et: &et, ci: INODE_CACHE(inode), bh); |
589 | status = ocfs2_lock_allocators(inode, et: &et, clusters_to_add, extents_to_split: 0, |
590 | data_ac: &data_ac, meta_ac: &meta_ac); |
591 | if (status) { |
592 | mlog_errno(status); |
593 | goto leave; |
594 | } |
595 | |
596 | credits = ocfs2_calc_extend_credits(sb: osb->sb, root_el: &fe->id2.i_list); |
597 | handle = ocfs2_start_trans(osb, max_buffs: credits); |
598 | if (IS_ERR(ptr: handle)) { |
599 | status = PTR_ERR(ptr: handle); |
600 | handle = NULL; |
601 | mlog_errno(status); |
602 | goto leave; |
603 | } |
604 | |
605 | restarted_transaction: |
606 | trace_ocfs2_extend_allocation( |
607 | ip_blkno: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
608 | size: (unsigned long long)i_size_read(inode), |
609 | le32_to_cpu(fe->i_clusters), clusters_to_add, |
610 | why, restart_func); |
611 | |
612 | status = dquot_alloc_space_nodirty(inode, |
613 | nr: ocfs2_clusters_to_bytes(sb: osb->sb, clusters: clusters_to_add)); |
614 | if (status) |
615 | goto leave; |
616 | did_quota = 1; |
617 | |
618 | /* reserve a write to the file entry early on - that we if we |
619 | * run out of credits in the allocation path, we can still |
620 | * update i_size. */ |
621 | status = ocfs2_journal_access_di(handle, ci: INODE_CACHE(inode), bh, |
622 | OCFS2_JOURNAL_ACCESS_WRITE); |
623 | if (status < 0) { |
624 | mlog_errno(status); |
625 | goto leave; |
626 | } |
627 | |
628 | prev_clusters = OCFS2_I(inode)->ip_clusters; |
629 | |
630 | status = ocfs2_add_inode_data(osb, |
631 | inode, |
632 | logical_offset: &logical_start, |
633 | clusters_to_add, |
634 | mark_unwritten, |
635 | fe_bh: bh, |
636 | handle, |
637 | data_ac, |
638 | meta_ac, |
639 | reason_ret: &why); |
640 | if ((status < 0) && (status != -EAGAIN)) { |
641 | if (status != -ENOSPC) |
642 | mlog_errno(status); |
643 | goto leave; |
644 | } |
645 | ocfs2_update_inode_fsync_trans(handle, inode, datasync: 1); |
646 | ocfs2_journal_dirty(handle, bh); |
647 | |
648 | spin_lock(lock: &OCFS2_I(inode)->ip_lock); |
649 | clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters); |
650 | spin_unlock(lock: &OCFS2_I(inode)->ip_lock); |
651 | /* Release unused quota reservation */ |
652 | dquot_free_space(inode, |
653 | nr: ocfs2_clusters_to_bytes(sb: osb->sb, clusters: clusters_to_add)); |
654 | did_quota = 0; |
655 | |
656 | if (why != RESTART_NONE && clusters_to_add) { |
657 | if (why == RESTART_META) { |
658 | restart_func = 1; |
659 | status = 0; |
660 | } else { |
661 | BUG_ON(why != RESTART_TRANS); |
662 | |
663 | status = ocfs2_allocate_extend_trans(handle, thresh: 1); |
664 | if (status < 0) { |
665 | /* handle still has to be committed at |
666 | * this point. */ |
667 | status = -ENOMEM; |
668 | mlog_errno(status); |
669 | goto leave; |
670 | } |
671 | goto restarted_transaction; |
672 | } |
673 | } |
674 | |
675 | trace_ocfs2_extend_allocation_end(ino: OCFS2_I(inode)->ip_blkno, |
676 | le32_to_cpu(fe->i_clusters), |
677 | di_size: (unsigned long long)le64_to_cpu(fe->i_size), |
678 | ip_clusters: OCFS2_I(inode)->ip_clusters, |
679 | i_size: (unsigned long long)i_size_read(inode)); |
680 | |
681 | leave: |
682 | if (status < 0 && did_quota) |
683 | dquot_free_space(inode, |
684 | nr: ocfs2_clusters_to_bytes(sb: osb->sb, clusters: clusters_to_add)); |
685 | if (handle) { |
686 | ocfs2_commit_trans(osb, handle); |
687 | handle = NULL; |
688 | } |
689 | if (data_ac) { |
690 | ocfs2_free_alloc_context(ac: data_ac); |
691 | data_ac = NULL; |
692 | } |
693 | if (meta_ac) { |
694 | ocfs2_free_alloc_context(ac: meta_ac); |
695 | meta_ac = NULL; |
696 | } |
697 | if ((!status) && restart_func) { |
698 | restart_func = 0; |
699 | goto restart_all; |
700 | } |
701 | brelse(bh); |
702 | bh = NULL; |
703 | |
704 | return status; |
705 | } |
706 | |
707 | /* |
708 | * While a write will already be ordering the data, a truncate will not. |
709 | * Thus, we need to explicitly order the zeroed pages. |
710 | */ |
711 | static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode, |
712 | struct buffer_head *di_bh, |
713 | loff_t start_byte, |
714 | loff_t length) |
715 | { |
716 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
717 | handle_t *handle = NULL; |
718 | int ret = 0; |
719 | |
720 | if (!ocfs2_should_order_data(inode)) |
721 | goto out; |
722 | |
723 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
724 | if (IS_ERR(ptr: handle)) { |
725 | ret = -ENOMEM; |
726 | mlog_errno(ret); |
727 | goto out; |
728 | } |
729 | |
730 | ret = ocfs2_jbd2_inode_add_write(handle, inode, start_byte, length); |
731 | if (ret < 0) { |
732 | mlog_errno(ret); |
733 | goto out; |
734 | } |
735 | |
736 | ret = ocfs2_journal_access_di(handle, ci: INODE_CACHE(inode), bh: di_bh, |
737 | OCFS2_JOURNAL_ACCESS_WRITE); |
738 | if (ret) |
739 | mlog_errno(ret); |
740 | ocfs2_update_inode_fsync_trans(handle, inode, datasync: 1); |
741 | |
742 | out: |
743 | if (ret) { |
744 | if (!IS_ERR(ptr: handle)) |
745 | ocfs2_commit_trans(osb, handle); |
746 | handle = ERR_PTR(error: ret); |
747 | } |
748 | return handle; |
749 | } |
750 | |
751 | /* Some parts of this taken from generic_cont_expand, which turned out |
752 | * to be too fragile to do exactly what we need without us having to |
753 | * worry about recursive locking in ->write_begin() and ->write_end(). */ |
754 | static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from, |
755 | u64 abs_to, struct buffer_head *di_bh) |
756 | { |
757 | struct address_space *mapping = inode->i_mapping; |
758 | struct page *page; |
759 | unsigned long index = abs_from >> PAGE_SHIFT; |
760 | handle_t *handle; |
761 | int ret = 0; |
762 | unsigned zero_from, zero_to, block_start, block_end; |
763 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
764 | |
765 | BUG_ON(abs_from >= abs_to); |
766 | BUG_ON(abs_to > (((u64)index + 1) << PAGE_SHIFT)); |
767 | BUG_ON(abs_from & (inode->i_blkbits - 1)); |
768 | |
769 | handle = ocfs2_zero_start_ordered_transaction(inode, di_bh, |
770 | start_byte: abs_from, |
771 | length: abs_to - abs_from); |
772 | if (IS_ERR(ptr: handle)) { |
773 | ret = PTR_ERR(ptr: handle); |
774 | goto out; |
775 | } |
776 | |
777 | page = find_or_create_page(mapping, index, GFP_NOFS); |
778 | if (!page) { |
779 | ret = -ENOMEM; |
780 | mlog_errno(ret); |
781 | goto out_commit_trans; |
782 | } |
783 | |
784 | /* Get the offsets within the page that we want to zero */ |
785 | zero_from = abs_from & (PAGE_SIZE - 1); |
786 | zero_to = abs_to & (PAGE_SIZE - 1); |
787 | if (!zero_to) |
788 | zero_to = PAGE_SIZE; |
789 | |
790 | trace_ocfs2_write_zero_page( |
791 | ino: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
792 | abs_from: (unsigned long long)abs_from, |
793 | abs_to: (unsigned long long)abs_to, |
794 | index, zero_from, zero_to); |
795 | |
796 | /* We know that zero_from is block aligned */ |
797 | for (block_start = zero_from; block_start < zero_to; |
798 | block_start = block_end) { |
799 | block_end = block_start + i_blocksize(node: inode); |
800 | |
801 | /* |
802 | * block_start is block-aligned. Bump it by one to force |
803 | * __block_write_begin and block_commit_write to zero the |
804 | * whole block. |
805 | */ |
806 | ret = __block_write_begin(page, pos: block_start + 1, len: 0, |
807 | get_block: ocfs2_get_block); |
808 | if (ret < 0) { |
809 | mlog_errno(ret); |
810 | goto out_unlock; |
811 | } |
812 | |
813 | |
814 | /* must not update i_size! */ |
815 | block_commit_write(page, from: block_start + 1, to: block_start + 1); |
816 | } |
817 | |
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_folio(). |
822 | */ |
823 | i_size_write(inode, i_size: abs_to); |
824 | inode->i_blocks = ocfs2_inode_sector_count(inode); |
825 | di->i_size = cpu_to_le64((u64)i_size_read(inode)); |
826 | inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode)); |
827 | di->i_mtime = di->i_ctime = cpu_to_le64(inode_get_mtime_sec(inode)); |
828 | di->i_ctime_nsec = cpu_to_le32(inode_get_mtime_nsec(inode)); |
829 | di->i_mtime_nsec = di->i_ctime_nsec; |
830 | if (handle) { |
831 | ocfs2_journal_dirty(handle, bh: di_bh); |
832 | ocfs2_update_inode_fsync_trans(handle, inode, datasync: 1); |
833 | } |
834 | |
835 | out_unlock: |
836 | unlock_page(page); |
837 | put_page(page); |
838 | out_commit_trans: |
839 | if (handle) |
840 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
841 | out: |
842 | return ret; |
843 | } |
844 | |
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) |
861 | { |
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(sb: inode->i_sb, bytes: zero_end); |
867 | unsigned int num_clusters = 0; |
868 | unsigned int ext_flags = 0; |
869 | |
870 | while (zero_cpos < last_cpos) { |
871 | rc = ocfs2_get_clusters(inode, v_cluster: zero_cpos, p_cluster: &p_cpos, |
872 | num_clusters: &num_clusters, extent_flags: &ext_flags); |
873 | if (rc) { |
874 | mlog_errno(rc); |
875 | goto out; |
876 | } |
877 | |
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, v_cluster: zero_cpos + zero_clusters, |
894 | p_cluster: &p_cpos, num_clusters: &num_clusters, |
895 | extent_flags: &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) { |
911 | rc = ocfs2_refcount_cow(inode, di_bh, cpos: zero_cpos, |
912 | write_len: zero_clusters, UINT_MAX); |
913 | if (rc) { |
914 | mlog_errno(rc); |
915 | goto out; |
916 | } |
917 | } |
918 | |
919 | *range_start = ocfs2_clusters_to_bytes(sb: inode->i_sb, clusters: zero_cpos); |
920 | *range_end = ocfs2_clusters_to_bytes(sb: inode->i_sb, |
921 | clusters: 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, |
932 | u64 range_end, struct buffer_head *di_bh) |
933 | { |
934 | int rc = 0; |
935 | u64 next_pos; |
936 | u64 zero_pos = range_start; |
937 | |
938 | trace_ocfs2_zero_extend_range( |
939 | value1: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
940 | value2: (unsigned long long)range_start, |
941 | value3: (unsigned long long)range_end); |
942 | BUG_ON(range_start >= range_end); |
943 | |
944 | while (zero_pos < range_end) { |
945 | next_pos = (zero_pos & PAGE_MASK) + PAGE_SIZE; |
946 | if (next_pos > range_end) |
947 | next_pos = range_end; |
948 | rc = ocfs2_write_zero_page(inode, abs_from: zero_pos, abs_to: next_pos, di_bh); |
949 | if (rc < 0) { |
950 | mlog_errno(rc); |
951 | break; |
952 | } |
953 | zero_pos = next_pos; |
954 | |
955 | /* |
956 | * Very large extends have the potential to lock up |
957 | * the cpu for extended periods of time. |
958 | */ |
959 | cond_resched(); |
960 | } |
961 | |
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, bytes: i_size_read(inode)); |
973 | trace_ocfs2_zero_extend(value1: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
974 | value2: (unsigned long long)zero_start, |
975 | value3: (unsigned long long)i_size_read(inode)); |
976 | while (zero_start < zero_to_size) { |
977 | ret = ocfs2_zero_extend_get_range(inode, di_bh, zero_start, |
978 | zero_end: zero_to_size, |
979 | range_start: &range_start, |
980 | range_end: &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, |
994 | range_end, di_bh); |
995 | if (ret) { |
996 | mlog_errno(ret); |
997 | break; |
998 | } |
999 | zero_start = range_end; |
1000 | } |
1001 | |
1002 | return ret; |
1003 | } |
1004 | |
1005 | int ocfs2_extend_no_holes(struct inode *inode, struct buffer_head *di_bh, |
1006 | u64 new_i_size, u64 zero_to) |
1007 | { |
1008 | int ret; |
1009 | u32 clusters_to_add; |
1010 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1011 | |
1012 | /* |
1013 | * Only quota files call this without a bh, and they can't be |
1014 | * refcounted. |
1015 | */ |
1016 | BUG_ON(!di_bh && ocfs2_is_refcount_inode(inode)); |
1017 | BUG_ON(!di_bh && !(oi->ip_flags & OCFS2_INODE_SYSTEM_FILE)); |
1018 | |
1019 | clusters_to_add = ocfs2_clusters_for_bytes(sb: inode->i_sb, bytes: 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) { |
1026 | ret = ocfs2_extend_allocation(inode, logical_start: oi->ip_clusters, |
1027 | clusters_to_add, mark_unwritten: 0); |
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 | */ |
1039 | ret = ocfs2_zero_extend(inode, di_bh, zero_to_size: zero_to); |
1040 | if (ret < 0) |
1041 | mlog_errno(ret); |
1042 | |
1043 | out: |
1044 | return ret; |
1045 | } |
1046 | |
1047 | static int ocfs2_extend_file(struct inode *inode, |
1048 | struct buffer_head *di_bh, |
1049 | u64 new_i_size) |
1050 | { |
1051 | int ret = 0; |
1052 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1053 | |
1054 | BUG_ON(!di_bh); |
1055 | |
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) |
1061 | goto out; |
1062 | BUG_ON(new_i_size < i_size_read(inode)); |
1063 | |
1064 | /* |
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_rwsem to block other extend/truncate calls while we're |
1068 | * here. We even have to hold it for sparse files because there |
1069 | * might be some tail zeroing. |
1070 | */ |
1071 | down_write(sem: &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_size: new_i_size)) { |
1079 | up_write(sem: &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(sem: &oi->ip_alloc_sem); |
1086 | mlog_errno(ret); |
1087 | goto out; |
1088 | } |
1089 | } |
1090 | |
1091 | if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) |
1092 | ret = ocfs2_zero_extend(inode, di_bh, zero_to_size: new_i_size); |
1093 | else |
1094 | ret = ocfs2_extend_no_holes(inode, di_bh, new_i_size, |
1095 | zero_to: new_i_size); |
1096 | |
1097 | up_write(sem: &oi->ip_alloc_sem); |
1098 | |
1099 | if (ret < 0) { |
1100 | mlog_errno(ret); |
1101 | goto out; |
1102 | } |
1103 | |
1104 | out_update_size: |
1105 | ret = ocfs2_simple_size_update(inode, di_bh, new_i_size); |
1106 | if (ret < 0) |
1107 | mlog_errno(ret); |
1108 | |
1109 | out: |
1110 | return ret; |
1111 | } |
1112 | |
1113 | int ocfs2_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
1114 | struct iattr *attr) |
1115 | { |
1116 | int status = 0, size_change; |
1117 | int inode_locked = 0; |
1118 | struct inode *inode = d_inode(dentry); |
1119 | struct super_block *sb = inode->i_sb; |
1120 | struct ocfs2_super *osb = OCFS2_SB(sb); |
1121 | struct buffer_head *bh = NULL; |
1122 | handle_t *handle = NULL; |
1123 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
1124 | int qtype; |
1125 | int had_lock; |
1126 | struct ocfs2_lock_holder oh; |
1127 | |
1128 | trace_ocfs2_setattr(inode, dentry, |
1129 | ino: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
1130 | d_len: dentry->d_name.len, d_name: dentry->d_name.name, |
1131 | ia_valid: attr->ia_valid, ia_mode: attr->ia_mode, |
1132 | ia_uid: from_kuid(to: &init_user_ns, uid: attr->ia_uid), |
1133 | ia_gid: from_kgid(to: &init_user_ns, gid: attr->ia_gid)); |
1134 | |
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 | |
1139 | #define OCFS2_VALID_ATTRS (ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_SIZE \ |
1140 | | ATTR_GID | ATTR_UID | ATTR_MODE) |
1141 | if (!(attr->ia_valid & OCFS2_VALID_ATTRS)) |
1142 | return 0; |
1143 | |
1144 | status = setattr_prepare(&nop_mnt_idmap, dentry, attr); |
1145 | if (status) |
1146 | return status; |
1147 | |
1148 | if (is_quota_modification(idmap: &nop_mnt_idmap, inode, ia: attr)) { |
1149 | status = dquot_initialize(inode); |
1150 | if (status) |
1151 | return status; |
1152 | } |
1153 | size_change = S_ISREG(inode->i_mode) && attr->ia_valid & ATTR_SIZE; |
1154 | if (size_change) { |
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 | |
1162 | status = ocfs2_rw_lock(inode, write: 1); |
1163 | if (status < 0) { |
1164 | mlog_errno(status); |
1165 | goto bail; |
1166 | } |
1167 | } |
1168 | |
1169 | had_lock = ocfs2_inode_lock_tracker(inode, ret_bh: &bh, ex: 1, oh: &oh); |
1170 | if (had_lock < 0) { |
1171 | status = had_lock; |
1172 | goto bail_unlock_rw; |
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(); |
1193 | } |
1194 | inode_locked = 1; |
1195 | |
1196 | if (size_change) { |
1197 | status = inode_newsize_ok(inode, offset: attr->ia_size); |
1198 | if (status) |
1199 | goto bail_unlock; |
1200 | |
1201 | if (i_size_read(inode) >= attr->ia_size) { |
1202 | if (ocfs2_should_order_data(inode)) { |
1203 | status = ocfs2_begin_ordered_truncate(inode, |
1204 | new_size: attr->ia_size); |
1205 | if (status) |
1206 | goto bail_unlock; |
1207 | } |
1208 | status = ocfs2_truncate_file(inode, di_bh: bh, new_i_size: attr->ia_size); |
1209 | } else |
1210 | status = ocfs2_extend_file(inode, di_bh: bh, new_i_size: attr->ia_size); |
1211 | if (status < 0) { |
1212 | if (status != -ENOSPC) |
1213 | mlog_errno(status); |
1214 | status = -ENOSPC; |
1215 | goto bail_unlock; |
1216 | } |
1217 | } |
1218 | |
1219 | if ((attr->ia_valid & ATTR_UID && !uid_eq(left: attr->ia_uid, right: inode->i_uid)) || |
1220 | (attr->ia_valid & ATTR_GID && !gid_eq(left: attr->ia_gid, right: inode->i_gid))) { |
1221 | /* |
1222 | * Gather pointers to quota structures so that allocation / |
1223 | * freeing of quota structures happens here and not inside |
1224 | * dquot_transfer() where we have problems with lock ordering |
1225 | */ |
1226 | if (attr->ia_valid & ATTR_UID && !uid_eq(left: attr->ia_uid, right: inode->i_uid) |
1227 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
1228 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) { |
1229 | transfer_to[USRQUOTA] = dqget(sb, qid: make_kqid_uid(uid: attr->ia_uid)); |
1230 | if (IS_ERR(ptr: transfer_to[USRQUOTA])) { |
1231 | status = PTR_ERR(ptr: transfer_to[USRQUOTA]); |
1232 | transfer_to[USRQUOTA] = NULL; |
1233 | goto bail_unlock; |
1234 | } |
1235 | } |
1236 | if (attr->ia_valid & ATTR_GID && !gid_eq(left: attr->ia_gid, right: inode->i_gid) |
1237 | && OCFS2_HAS_RO_COMPAT_FEATURE(sb, |
1238 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) { |
1239 | transfer_to[GRPQUOTA] = dqget(sb, qid: make_kqid_gid(gid: attr->ia_gid)); |
1240 | if (IS_ERR(ptr: transfer_to[GRPQUOTA])) { |
1241 | status = PTR_ERR(ptr: transfer_to[GRPQUOTA]); |
1242 | transfer_to[GRPQUOTA] = NULL; |
1243 | goto bail_unlock; |
1244 | } |
1245 | } |
1246 | down_write(sem: &OCFS2_I(inode)->ip_alloc_sem); |
1247 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS + |
1248 | 2 * ocfs2_quota_trans_credits(sb)); |
1249 | if (IS_ERR(ptr: handle)) { |
1250 | status = PTR_ERR(ptr: handle); |
1251 | mlog_errno(status); |
1252 | goto bail_unlock_alloc; |
1253 | } |
1254 | status = __dquot_transfer(inode, transfer_to); |
1255 | if (status < 0) |
1256 | goto bail_commit; |
1257 | } else { |
1258 | down_write(sem: &OCFS2_I(inode)->ip_alloc_sem); |
1259 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
1260 | if (IS_ERR(ptr: handle)) { |
1261 | status = PTR_ERR(ptr: handle); |
1262 | mlog_errno(status); |
1263 | goto bail_unlock_alloc; |
1264 | } |
1265 | } |
1266 | |
1267 | setattr_copy(&nop_mnt_idmap, inode, attr); |
1268 | mark_inode_dirty(inode); |
1269 | |
1270 | status = ocfs2_mark_inode_dirty(handle, inode, bh); |
1271 | if (status < 0) |
1272 | mlog_errno(status); |
1273 | |
1274 | bail_commit: |
1275 | ocfs2_commit_trans(osb, handle); |
1276 | bail_unlock_alloc: |
1277 | up_write(sem: &OCFS2_I(inode)->ip_alloc_sem); |
1278 | bail_unlock: |
1279 | if (status && inode_locked) { |
1280 | ocfs2_inode_unlock_tracker(inode, ex: 1, oh: &oh, had_lock); |
1281 | inode_locked = 0; |
1282 | } |
1283 | bail_unlock_rw: |
1284 | if (size_change) |
1285 | ocfs2_rw_unlock(inode, write: 1); |
1286 | bail: |
1287 | |
1288 | /* Release quota pointers in case we acquired them */ |
1289 | for (qtype = 0; qtype < OCFS2_MAXQUOTAS; qtype++) |
1290 | dqput(dquot: transfer_to[qtype]); |
1291 | |
1292 | if (!status && attr->ia_valid & ATTR_MODE) { |
1293 | status = ocfs2_acl_chmod(inode, bh); |
1294 | if (status < 0) |
1295 | mlog_errno(status); |
1296 | } |
1297 | if (inode_locked) |
1298 | ocfs2_inode_unlock_tracker(inode, ex: 1, oh: &oh, had_lock); |
1299 | |
1300 | brelse(bh); |
1301 | return status; |
1302 | } |
1303 | |
1304 | int ocfs2_getattr(struct mnt_idmap *idmap, const struct path *path, |
1305 | struct kstat *stat, u32 request_mask, unsigned int flags) |
1306 | { |
1307 | struct inode *inode = d_inode(dentry: path->dentry); |
1308 | struct super_block *sb = path->dentry->d_sb; |
1309 | struct ocfs2_super *osb = sb->s_fs_info; |
1310 | int err; |
1311 | |
1312 | err = ocfs2_inode_revalidate(dentry: path->dentry); |
1313 | if (err) { |
1314 | if (err != -ENOENT) |
1315 | mlog_errno(err); |
1316 | goto bail; |
1317 | } |
1318 | |
1319 | generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat); |
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; |
1328 | |
1329 | /* We set the blksize from the cluster size for performance */ |
1330 | stat->blksize = osb->s_clustersize; |
1331 | |
1332 | bail: |
1333 | return err; |
1334 | } |
1335 | |
1336 | int ocfs2_permission(struct mnt_idmap *idmap, struct inode *inode, |
1337 | int mask) |
1338 | { |
1339 | int ret, had_lock; |
1340 | struct ocfs2_lock_holder oh; |
1341 | |
1342 | if (mask & MAY_NOT_BLOCK) |
1343 | return -ECHILD; |
1344 | |
1345 | had_lock = ocfs2_inode_lock_tracker(inode, NULL, ex: 0, oh: &oh); |
1346 | if (had_lock < 0) { |
1347 | ret = had_lock; |
1348 | goto out; |
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(); |
1360 | } |
1361 | |
1362 | ret = generic_permission(&nop_mnt_idmap, inode, mask); |
1363 | |
1364 | ocfs2_inode_unlock_tracker(inode, ex: 0, oh: &oh, had_lock); |
1365 | out: |
1366 | return ret; |
1367 | } |
1368 | |
1369 | static int __ocfs2_write_remove_suid(struct inode *inode, |
1370 | struct buffer_head *bh) |
1371 | { |
1372 | int ret; |
1373 | handle_t *handle; |
1374 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1375 | struct ocfs2_dinode *di; |
1376 | |
1377 | trace_ocfs2_write_remove_suid( |
1378 | val1: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
1379 | val2: inode->i_mode); |
1380 | |
1381 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
1382 | if (IS_ERR(ptr: handle)) { |
1383 | ret = PTR_ERR(ptr: handle); |
1384 | mlog_errno(ret); |
1385 | goto out; |
1386 | } |
1387 | |
1388 | ret = ocfs2_journal_access_di(handle, ci: INODE_CACHE(inode), bh, |
1389 | OCFS2_JOURNAL_ACCESS_WRITE); |
1390 | if (ret < 0) { |
1391 | mlog_errno(ret); |
1392 | goto out_trans; |
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); |
1401 | ocfs2_update_inode_fsync_trans(handle, inode, datasync: 0); |
1402 | |
1403 | ocfs2_journal_dirty(handle, bh); |
1404 | |
1405 | out_trans: |
1406 | ocfs2_commit_trans(osb, handle); |
1407 | out: |
1408 | return ret; |
1409 | } |
1410 | |
1411 | static int ocfs2_write_remove_suid(struct inode *inode) |
1412 | { |
1413 | int ret; |
1414 | struct buffer_head *bh = NULL; |
1415 | |
1416 | ret = ocfs2_read_inode_block(inode, bh: &bh); |
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 | |
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; |
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) { |
1442 | ret = ocfs2_read_inode_block(inode, bh: &di_bh); |
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, new_size: 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 | } |
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(sb: inode->i_sb, bytes: start + len); |
1467 | clusters -= cpos; |
1468 | |
1469 | while (clusters) { |
1470 | ret = ocfs2_get_clusters(inode, v_cluster: cpos, p_cluster: &phys_cpos, |
1471 | num_clusters: &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 | |
1492 | ret = ocfs2_extend_allocation(inode, logical_start: cpos, clusters_to_add: alloc_size, mark_unwritten: 1); |
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: |
1506 | |
1507 | brelse(bh: di_bh); |
1508 | return ret; |
1509 | } |
1510 | |
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(sb: inode->i_sb, bytes: 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, holebegin: start, holelen: end - start, even_cows: 0); |
1528 | truncate_inode_pages_range(mapping, lstart: start, lend: end - 1); |
1529 | } |
1530 | } |
1531 | |
1532 | /* |
1533 | * zero out partial blocks of one cluster. |
1534 | * |
1535 | * start: file offset where zero starts, will be made upper block aligned. |
1536 | * len: it will be trimmed to the end of current cluster if "start + len" |
1537 | * is bigger than it. |
1538 | */ |
1539 | static int ocfs2_zeroout_partial_cluster(struct inode *inode, |
1540 | u64 start, u64 len) |
1541 | { |
1542 | int ret; |
1543 | u64 start_block, end_block, nr_blocks; |
1544 | u64 p_block, offset; |
1545 | u32 cluster, p_cluster, nr_clusters; |
1546 | struct super_block *sb = inode->i_sb; |
1547 | u64 end = ocfs2_align_bytes_to_clusters(sb, bytes: start); |
1548 | |
1549 | if (start + len < end) |
1550 | end = start + len; |
1551 | |
1552 | start_block = ocfs2_blocks_for_bytes(sb, bytes: start); |
1553 | end_block = ocfs2_blocks_for_bytes(sb, bytes: end); |
1554 | nr_blocks = end_block - start_block; |
1555 | if (!nr_blocks) |
1556 | return 0; |
1557 | |
1558 | cluster = ocfs2_bytes_to_clusters(sb, bytes: start); |
1559 | ret = ocfs2_get_clusters(inode, v_cluster: cluster, p_cluster: &p_cluster, |
1560 | num_clusters: &nr_clusters, NULL); |
1561 | if (ret) |
1562 | return ret; |
1563 | if (!p_cluster) |
1564 | return 0; |
1565 | |
1566 | offset = start_block - ocfs2_clusters_to_blocks(sb, clusters: cluster); |
1567 | p_block = ocfs2_clusters_to_blocks(sb, clusters: p_cluster) + offset; |
1568 | return sb_issue_zeroout(sb, block: p_block, nr_blocks, GFP_NOFS); |
1569 | } |
1570 | |
1571 | static int ocfs2_zero_partial_clusters(struct inode *inode, |
1572 | u64 start, u64 len) |
1573 | { |
1574 | int ret = 0; |
1575 | u64 tmpend = 0; |
1576 | u64 end = start + len; |
1577 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1578 | unsigned int csize = osb->s_clustersize; |
1579 | handle_t *handle; |
1580 | loff_t isize = i_size_read(inode); |
1581 | |
1582 | /* |
1583 | * The "start" and "end" values are NOT necessarily part of |
1584 | * the range whose allocation is being deleted. Rather, this |
1585 | * is what the user passed in with the request. We must zero |
1586 | * partial clusters here. There's no need to worry about |
1587 | * physical allocation - the zeroing code knows to skip holes. |
1588 | */ |
1589 | trace_ocfs2_zero_partial_clusters( |
1590 | value1: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
1591 | value2: (unsigned long long)start, value3: (unsigned long long)end); |
1592 | |
1593 | /* |
1594 | * If both edges are on a cluster boundary then there's no |
1595 | * zeroing required as the region is part of the allocation to |
1596 | * be truncated. |
1597 | */ |
1598 | if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0) |
1599 | goto out; |
1600 | |
1601 | /* No page cache for EOF blocks, issue zero out to disk. */ |
1602 | if (end > isize) { |
1603 | /* |
1604 | * zeroout eof blocks in last cluster starting from |
1605 | * "isize" even "start" > "isize" because it is |
1606 | * complicated to zeroout just at "start" as "start" |
1607 | * may be not aligned with block size, buffer write |
1608 | * would be required to do that, but out of eof buffer |
1609 | * write is not supported. |
1610 | */ |
1611 | ret = ocfs2_zeroout_partial_cluster(inode, start: isize, |
1612 | len: end - isize); |
1613 | if (ret) { |
1614 | mlog_errno(ret); |
1615 | goto out; |
1616 | } |
1617 | if (start >= isize) |
1618 | goto out; |
1619 | end = isize; |
1620 | } |
1621 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
1622 | if (IS_ERR(ptr: handle)) { |
1623 | ret = PTR_ERR(ptr: handle); |
1624 | mlog_errno(ret); |
1625 | goto out; |
1626 | } |
1627 | |
1628 | /* |
1629 | * If start is on a cluster boundary and end is somewhere in another |
1630 | * cluster, we have not COWed the cluster starting at start, unless |
1631 | * end is also within the same cluster. So, in this case, we skip this |
1632 | * first call to ocfs2_zero_range_for_truncate() truncate and move on |
1633 | * to the next one. |
1634 | */ |
1635 | if ((start & (csize - 1)) != 0) { |
1636 | /* |
1637 | * We want to get the byte offset of the end of the 1st |
1638 | * cluster. |
1639 | */ |
1640 | tmpend = (u64)osb->s_clustersize + |
1641 | (start & ~(osb->s_clustersize - 1)); |
1642 | if (tmpend > end) |
1643 | tmpend = end; |
1644 | |
1645 | trace_ocfs2_zero_partial_clusters_range1( |
1646 | val1: (unsigned long long)start, |
1647 | val2: (unsigned long long)tmpend); |
1648 | |
1649 | ret = ocfs2_zero_range_for_truncate(inode, handle, range_start: start, |
1650 | range_end: tmpend); |
1651 | if (ret) |
1652 | mlog_errno(ret); |
1653 | } |
1654 | |
1655 | if (tmpend < end) { |
1656 | /* |
1657 | * This may make start and end equal, but the zeroing |
1658 | * code will skip any work in that case so there's no |
1659 | * need to catch it up here. |
1660 | */ |
1661 | start = end & ~(osb->s_clustersize - 1); |
1662 | |
1663 | trace_ocfs2_zero_partial_clusters_range2( |
1664 | val1: (unsigned long long)start, val2: (unsigned long long)end); |
1665 | |
1666 | ret = ocfs2_zero_range_for_truncate(inode, handle, range_start: start, range_end: end); |
1667 | if (ret) |
1668 | mlog_errno(ret); |
1669 | } |
1670 | ocfs2_update_inode_fsync_trans(handle, inode, datasync: 1); |
1671 | |
1672 | ocfs2_commit_trans(osb, handle); |
1673 | out: |
1674 | return ret; |
1675 | } |
1676 | |
1677 | static int ocfs2_find_rec(struct ocfs2_extent_list *el, u32 pos) |
1678 | { |
1679 | int i; |
1680 | struct ocfs2_extent_rec *rec = NULL; |
1681 | |
1682 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { |
1683 | |
1684 | rec = &el->l_recs[i]; |
1685 | |
1686 | if (le32_to_cpu(rec->e_cpos) < pos) |
1687 | break; |
1688 | } |
1689 | |
1690 | return i; |
1691 | } |
1692 | |
1693 | /* |
1694 | * Helper to calculate the punching pos and length in one run, we handle the |
1695 | * following three cases in order: |
1696 | * |
1697 | * - remove the entire record |
1698 | * - remove a partial record |
1699 | * - no record needs to be removed (hole-punching completed) |
1700 | */ |
1701 | static void ocfs2_calc_trunc_pos(struct inode *inode, |
1702 | struct ocfs2_extent_list *el, |
1703 | struct ocfs2_extent_rec *rec, |
1704 | u32 trunc_start, u32 *trunc_cpos, |
1705 | u32 *trunc_len, u32 *trunc_end, |
1706 | u64 *blkno, int *done) |
1707 | { |
1708 | int ret = 0; |
1709 | u32 coff, range; |
1710 | |
1711 | range = le32_to_cpu(rec->e_cpos) + ocfs2_rec_clusters(el, rec); |
1712 | |
1713 | if (le32_to_cpu(rec->e_cpos) >= trunc_start) { |
1714 | /* |
1715 | * remove an entire extent record. |
1716 | */ |
1717 | *trunc_cpos = le32_to_cpu(rec->e_cpos); |
1718 | /* |
1719 | * Skip holes if any. |
1720 | */ |
1721 | if (range < *trunc_end) |
1722 | *trunc_end = range; |
1723 | *trunc_len = *trunc_end - le32_to_cpu(rec->e_cpos); |
1724 | *blkno = le64_to_cpu(rec->e_blkno); |
1725 | *trunc_end = le32_to_cpu(rec->e_cpos); |
1726 | } else if (range > trunc_start) { |
1727 | /* |
1728 | * remove a partial extent record, which means we're |
1729 | * removing the last extent record. |
1730 | */ |
1731 | *trunc_cpos = trunc_start; |
1732 | /* |
1733 | * skip hole if any. |
1734 | */ |
1735 | if (range < *trunc_end) |
1736 | *trunc_end = range; |
1737 | *trunc_len = *trunc_end - trunc_start; |
1738 | coff = trunc_start - le32_to_cpu(rec->e_cpos); |
1739 | *blkno = le64_to_cpu(rec->e_blkno) + |
1740 | ocfs2_clusters_to_blocks(sb: inode->i_sb, clusters: coff); |
1741 | *trunc_end = trunc_start; |
1742 | } else { |
1743 | /* |
1744 | * It may have two following possibilities: |
1745 | * |
1746 | * - last record has been removed |
1747 | * - trunc_start was within a hole |
1748 | * |
1749 | * both two cases mean the completion of hole punching. |
1750 | */ |
1751 | ret = 1; |
1752 | } |
1753 | |
1754 | *done = ret; |
1755 | } |
1756 | |
1757 | int ocfs2_remove_inode_range(struct inode *inode, |
1758 | struct buffer_head *di_bh, u64 byte_start, |
1759 | u64 byte_len) |
1760 | { |
1761 | int ret = 0, flags = 0, done = 0, i; |
1762 | u32 trunc_start, trunc_len, trunc_end, trunc_cpos, phys_cpos; |
1763 | u32 cluster_in_el; |
1764 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1765 | struct ocfs2_cached_dealloc_ctxt dealloc; |
1766 | struct address_space *mapping = inode->i_mapping; |
1767 | struct ocfs2_extent_tree et; |
1768 | struct ocfs2_path *path = NULL; |
1769 | struct ocfs2_extent_list *el = NULL; |
1770 | struct ocfs2_extent_rec *rec = NULL; |
1771 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
1772 | u64 blkno, refcount_loc = le64_to_cpu(di->i_refcount_loc); |
1773 | |
1774 | ocfs2_init_dinode_extent_tree(et: &et, ci: INODE_CACHE(inode), bh: di_bh); |
1775 | ocfs2_init_dealloc_ctxt(c: &dealloc); |
1776 | |
1777 | trace_ocfs2_remove_inode_range( |
1778 | value1: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
1779 | value2: (unsigned long long)byte_start, |
1780 | value3: (unsigned long long)byte_len); |
1781 | |
1782 | if (byte_len == 0) |
1783 | return 0; |
1784 | |
1785 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
1786 | ret = ocfs2_truncate_inline(inode, di_bh, start: byte_start, |
1787 | end: byte_start + byte_len, trunc: 0); |
1788 | if (ret) { |
1789 | mlog_errno(ret); |
1790 | goto out; |
1791 | } |
1792 | /* |
1793 | * There's no need to get fancy with the page cache |
1794 | * truncate of an inline-data inode. We're talking |
1795 | * about less than a page here, which will be cached |
1796 | * in the dinode buffer anyway. |
1797 | */ |
1798 | unmap_mapping_range(mapping, holebegin: 0, holelen: 0, even_cows: 0); |
1799 | truncate_inode_pages(mapping, 0); |
1800 | goto out; |
1801 | } |
1802 | |
1803 | /* |
1804 | * For reflinks, we may need to CoW 2 clusters which might be |
1805 | * partially zero'd later, if hole's start and end offset were |
1806 | * within one cluster(means is not exactly aligned to clustersize). |
1807 | */ |
1808 | |
1809 | if (ocfs2_is_refcount_inode(inode)) { |
1810 | ret = ocfs2_cow_file_pos(inode, fe_bh: di_bh, offset: byte_start); |
1811 | if (ret) { |
1812 | mlog_errno(ret); |
1813 | goto out; |
1814 | } |
1815 | |
1816 | ret = ocfs2_cow_file_pos(inode, fe_bh: di_bh, offset: byte_start + byte_len); |
1817 | if (ret) { |
1818 | mlog_errno(ret); |
1819 | goto out; |
1820 | } |
1821 | } |
1822 | |
1823 | trunc_start = ocfs2_clusters_for_bytes(sb: osb->sb, bytes: byte_start); |
1824 | trunc_end = (byte_start + byte_len) >> osb->s_clustersize_bits; |
1825 | cluster_in_el = trunc_end; |
1826 | |
1827 | ret = ocfs2_zero_partial_clusters(inode, start: byte_start, len: byte_len); |
1828 | if (ret) { |
1829 | mlog_errno(ret); |
1830 | goto out; |
1831 | } |
1832 | |
1833 | path = ocfs2_new_path_from_et(et: &et); |
1834 | if (!path) { |
1835 | ret = -ENOMEM; |
1836 | mlog_errno(ret); |
1837 | goto out; |
1838 | } |
1839 | |
1840 | while (trunc_end > trunc_start) { |
1841 | |
1842 | ret = ocfs2_find_path(ci: INODE_CACHE(inode), path, |
1843 | cpos: cluster_in_el); |
1844 | if (ret) { |
1845 | mlog_errno(ret); |
1846 | goto out; |
1847 | } |
1848 | |
1849 | el = path_leaf_el(path); |
1850 | |
1851 | i = ocfs2_find_rec(el, pos: trunc_end); |
1852 | /* |
1853 | * Need to go to previous extent block. |
1854 | */ |
1855 | if (i < 0) { |
1856 | if (path->p_tree_depth == 0) |
1857 | break; |
1858 | |
1859 | ret = ocfs2_find_cpos_for_left_leaf(sb: inode->i_sb, |
1860 | path, |
1861 | cpos: &cluster_in_el); |
1862 | if (ret) { |
1863 | mlog_errno(ret); |
1864 | goto out; |
1865 | } |
1866 | |
1867 | /* |
1868 | * We've reached the leftmost extent block, |
1869 | * it's safe to leave. |
1870 | */ |
1871 | if (cluster_in_el == 0) |
1872 | break; |
1873 | |
1874 | /* |
1875 | * The 'pos' searched for previous extent block is |
1876 | * always one cluster less than actual trunc_end. |
1877 | */ |
1878 | trunc_end = cluster_in_el + 1; |
1879 | |
1880 | ocfs2_reinit_path(path, keep_root: 1); |
1881 | |
1882 | continue; |
1883 | |
1884 | } else |
1885 | rec = &el->l_recs[i]; |
1886 | |
1887 | ocfs2_calc_trunc_pos(inode, el, rec, trunc_start, trunc_cpos: &trunc_cpos, |
1888 | trunc_len: &trunc_len, trunc_end: &trunc_end, blkno: &blkno, done: &done); |
1889 | if (done) |
1890 | break; |
1891 | |
1892 | flags = rec->e_flags; |
1893 | phys_cpos = ocfs2_blocks_to_clusters(sb: inode->i_sb, blocks: blkno); |
1894 | |
1895 | ret = ocfs2_remove_btree_range(inode, et: &et, cpos: trunc_cpos, |
1896 | phys_cpos, len: trunc_len, flags, |
1897 | dealloc: &dealloc, refcount_loc, refcount_tree_locked: false); |
1898 | if (ret < 0) { |
1899 | mlog_errno(ret); |
1900 | goto out; |
1901 | } |
1902 | |
1903 | cluster_in_el = trunc_end; |
1904 | |
1905 | ocfs2_reinit_path(path, keep_root: 1); |
1906 | } |
1907 | |
1908 | ocfs2_truncate_cluster_pages(inode, byte_start, byte_len); |
1909 | |
1910 | out: |
1911 | ocfs2_free_path(path); |
1912 | ocfs2_schedule_truncate_log_flush(osb, cancel: 1); |
1913 | ocfs2_run_deallocs(osb, ctxt: &dealloc); |
1914 | |
1915 | return ret; |
1916 | } |
1917 | |
1918 | /* |
1919 | * Parts of this function taken from xfs_change_file_space() |
1920 | */ |
1921 | static int __ocfs2_change_file_space(struct file *file, struct inode *inode, |
1922 | loff_t f_pos, unsigned int cmd, |
1923 | struct ocfs2_space_resv *sr, |
1924 | int change_size) |
1925 | { |
1926 | int ret; |
1927 | s64 llen; |
1928 | loff_t size, orig_isize; |
1929 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1930 | struct buffer_head *di_bh = NULL; |
1931 | handle_t *handle; |
1932 | unsigned long long max_off = inode->i_sb->s_maxbytes; |
1933 | |
1934 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
1935 | return -EROFS; |
1936 | |
1937 | inode_lock(inode); |
1938 | |
1939 | /* |
1940 | * This prevents concurrent writes on other nodes |
1941 | */ |
1942 | ret = ocfs2_rw_lock(inode, write: 1); |
1943 | if (ret) { |
1944 | mlog_errno(ret); |
1945 | goto out; |
1946 | } |
1947 | |
1948 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
1949 | if (ret) { |
1950 | mlog_errno(ret); |
1951 | goto out_rw_unlock; |
1952 | } |
1953 | |
1954 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { |
1955 | ret = -EPERM; |
1956 | goto out_inode_unlock; |
1957 | } |
1958 | |
1959 | switch (sr->l_whence) { |
1960 | case 0: /*SEEK_SET*/ |
1961 | break; |
1962 | case 1: /*SEEK_CUR*/ |
1963 | sr->l_start += f_pos; |
1964 | break; |
1965 | case 2: /*SEEK_END*/ |
1966 | sr->l_start += i_size_read(inode); |
1967 | break; |
1968 | default: |
1969 | ret = -EINVAL; |
1970 | goto out_inode_unlock; |
1971 | } |
1972 | sr->l_whence = 0; |
1973 | |
1974 | llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len; |
1975 | |
1976 | if (sr->l_start < 0 |
1977 | || sr->l_start > max_off |
1978 | || (sr->l_start + llen) < 0 |
1979 | || (sr->l_start + llen) > max_off) { |
1980 | ret = -EINVAL; |
1981 | goto out_inode_unlock; |
1982 | } |
1983 | size = sr->l_start + sr->l_len; |
1984 | |
1985 | if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64 || |
1986 | cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) { |
1987 | if (sr->l_len <= 0) { |
1988 | ret = -EINVAL; |
1989 | goto out_inode_unlock; |
1990 | } |
1991 | } |
1992 | |
1993 | if (file && setattr_should_drop_suidgid(&nop_mnt_idmap, file_inode(f: file))) { |
1994 | ret = __ocfs2_write_remove_suid(inode, bh: di_bh); |
1995 | if (ret) { |
1996 | mlog_errno(ret); |
1997 | goto out_inode_unlock; |
1998 | } |
1999 | } |
2000 | |
2001 | down_write(sem: &OCFS2_I(inode)->ip_alloc_sem); |
2002 | switch (cmd) { |
2003 | case OCFS2_IOC_RESVSP: |
2004 | case OCFS2_IOC_RESVSP64: |
2005 | /* |
2006 | * This takes unsigned offsets, but the signed ones we |
2007 | * pass have been checked against overflow above. |
2008 | */ |
2009 | ret = ocfs2_allocate_unwritten_extents(inode, start: sr->l_start, |
2010 | len: sr->l_len); |
2011 | break; |
2012 | case OCFS2_IOC_UNRESVSP: |
2013 | case OCFS2_IOC_UNRESVSP64: |
2014 | ret = ocfs2_remove_inode_range(inode, di_bh, byte_start: sr->l_start, |
2015 | byte_len: sr->l_len); |
2016 | break; |
2017 | default: |
2018 | ret = -EINVAL; |
2019 | } |
2020 | |
2021 | orig_isize = i_size_read(inode); |
2022 | /* zeroout eof blocks in the cluster. */ |
2023 | if (!ret && change_size && orig_isize < size) { |
2024 | ret = ocfs2_zeroout_partial_cluster(inode, start: orig_isize, |
2025 | len: size - orig_isize); |
2026 | if (!ret) |
2027 | i_size_write(inode, i_size: size); |
2028 | } |
2029 | up_write(sem: &OCFS2_I(inode)->ip_alloc_sem); |
2030 | if (ret) { |
2031 | mlog_errno(ret); |
2032 | goto out_inode_unlock; |
2033 | } |
2034 | |
2035 | /* |
2036 | * We update c/mtime for these changes |
2037 | */ |
2038 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
2039 | if (IS_ERR(ptr: handle)) { |
2040 | ret = PTR_ERR(ptr: handle); |
2041 | mlog_errno(ret); |
2042 | goto out_inode_unlock; |
2043 | } |
2044 | |
2045 | inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode)); |
2046 | ret = ocfs2_mark_inode_dirty(handle, inode, bh: di_bh); |
2047 | if (ret < 0) |
2048 | mlog_errno(ret); |
2049 | |
2050 | if (file && (file->f_flags & O_SYNC)) |
2051 | handle->h_sync = 1; |
2052 | |
2053 | ocfs2_commit_trans(osb, handle); |
2054 | |
2055 | out_inode_unlock: |
2056 | brelse(bh: di_bh); |
2057 | ocfs2_inode_unlock(inode, ex: 1); |
2058 | out_rw_unlock: |
2059 | ocfs2_rw_unlock(inode, write: 1); |
2060 | |
2061 | out: |
2062 | inode_unlock(inode); |
2063 | return ret; |
2064 | } |
2065 | |
2066 | int ocfs2_change_file_space(struct file *file, unsigned int cmd, |
2067 | struct ocfs2_space_resv *sr) |
2068 | { |
2069 | struct inode *inode = file_inode(f: file); |
2070 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2071 | int ret; |
2072 | |
2073 | if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) && |
2074 | !ocfs2_writes_unwritten_extents(osb)) |
2075 | return -ENOTTY; |
2076 | else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) && |
2077 | !ocfs2_sparse_alloc(osb)) |
2078 | return -ENOTTY; |
2079 | |
2080 | if (!S_ISREG(inode->i_mode)) |
2081 | return -EINVAL; |
2082 | |
2083 | if (!(file->f_mode & FMODE_WRITE)) |
2084 | return -EBADF; |
2085 | |
2086 | ret = mnt_want_write_file(file); |
2087 | if (ret) |
2088 | return ret; |
2089 | ret = __ocfs2_change_file_space(file, inode, f_pos: file->f_pos, cmd, sr, change_size: 0); |
2090 | mnt_drop_write_file(file); |
2091 | return ret; |
2092 | } |
2093 | |
2094 | static long ocfs2_fallocate(struct file *file, int mode, loff_t offset, |
2095 | loff_t len) |
2096 | { |
2097 | struct inode *inode = file_inode(f: file); |
2098 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2099 | struct ocfs2_space_resv sr; |
2100 | int change_size = 1; |
2101 | int cmd = OCFS2_IOC_RESVSP64; |
2102 | int ret = 0; |
2103 | |
2104 | if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) |
2105 | return -EOPNOTSUPP; |
2106 | if (!ocfs2_writes_unwritten_extents(osb)) |
2107 | return -EOPNOTSUPP; |
2108 | |
2109 | if (mode & FALLOC_FL_KEEP_SIZE) { |
2110 | change_size = 0; |
2111 | } else { |
2112 | ret = inode_newsize_ok(inode, offset: offset + len); |
2113 | if (ret) |
2114 | return ret; |
2115 | } |
2116 | |
2117 | if (mode & FALLOC_FL_PUNCH_HOLE) |
2118 | cmd = OCFS2_IOC_UNRESVSP64; |
2119 | |
2120 | sr.l_whence = 0; |
2121 | sr.l_start = (s64)offset; |
2122 | sr.l_len = (s64)len; |
2123 | |
2124 | return __ocfs2_change_file_space(NULL, inode, f_pos: offset, cmd, sr: &sr, |
2125 | change_size); |
2126 | } |
2127 | |
2128 | int ocfs2_check_range_for_refcount(struct inode *inode, loff_t pos, |
2129 | size_t count) |
2130 | { |
2131 | int ret = 0; |
2132 | unsigned int extent_flags; |
2133 | u32 cpos, clusters, extent_len, phys_cpos; |
2134 | struct super_block *sb = inode->i_sb; |
2135 | |
2136 | if (!ocfs2_refcount_tree(OCFS2_SB(inode->i_sb)) || |
2137 | !ocfs2_is_refcount_inode(inode) || |
2138 | OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) |
2139 | return 0; |
2140 | |
2141 | cpos = pos >> OCFS2_SB(sb)->s_clustersize_bits; |
2142 | clusters = ocfs2_clusters_for_bytes(sb, bytes: pos + count) - cpos; |
2143 | |
2144 | while (clusters) { |
2145 | ret = ocfs2_get_clusters(inode, v_cluster: cpos, p_cluster: &phys_cpos, num_clusters: &extent_len, |
2146 | extent_flags: &extent_flags); |
2147 | if (ret < 0) { |
2148 | mlog_errno(ret); |
2149 | goto out; |
2150 | } |
2151 | |
2152 | if (phys_cpos && (extent_flags & OCFS2_EXT_REFCOUNTED)) { |
2153 | ret = 1; |
2154 | break; |
2155 | } |
2156 | |
2157 | if (extent_len > clusters) |
2158 | extent_len = clusters; |
2159 | |
2160 | clusters -= extent_len; |
2161 | cpos += extent_len; |
2162 | } |
2163 | out: |
2164 | return ret; |
2165 | } |
2166 | |
2167 | static int ocfs2_is_io_unaligned(struct inode *inode, size_t count, loff_t pos) |
2168 | { |
2169 | int blockmask = inode->i_sb->s_blocksize - 1; |
2170 | loff_t final_size = pos + count; |
2171 | |
2172 | if ((pos & blockmask) || (final_size & blockmask)) |
2173 | return 1; |
2174 | return 0; |
2175 | } |
2176 | |
2177 | static int ocfs2_inode_lock_for_extent_tree(struct inode *inode, |
2178 | struct buffer_head **di_bh, |
2179 | int meta_level, |
2180 | int write_sem, |
2181 | int wait) |
2182 | { |
2183 | int ret = 0; |
2184 | |
2185 | if (wait) |
2186 | ret = ocfs2_inode_lock(inode, di_bh, meta_level); |
2187 | else |
2188 | ret = ocfs2_try_inode_lock(inode, di_bh, meta_level); |
2189 | if (ret < 0) |
2190 | goto out; |
2191 | |
2192 | if (wait) { |
2193 | if (write_sem) |
2194 | down_write(sem: &OCFS2_I(inode)->ip_alloc_sem); |
2195 | else |
2196 | down_read(sem: &OCFS2_I(inode)->ip_alloc_sem); |
2197 | } else { |
2198 | if (write_sem) |
2199 | ret = down_write_trylock(sem: &OCFS2_I(inode)->ip_alloc_sem); |
2200 | else |
2201 | ret = down_read_trylock(sem: &OCFS2_I(inode)->ip_alloc_sem); |
2202 | |
2203 | if (!ret) { |
2204 | ret = -EAGAIN; |
2205 | goto out_unlock; |
2206 | } |
2207 | } |
2208 | |
2209 | return ret; |
2210 | |
2211 | out_unlock: |
2212 | brelse(bh: *di_bh); |
2213 | *di_bh = NULL; |
2214 | ocfs2_inode_unlock(inode, ex: meta_level); |
2215 | out: |
2216 | return ret; |
2217 | } |
2218 | |
2219 | static void ocfs2_inode_unlock_for_extent_tree(struct inode *inode, |
2220 | struct buffer_head **di_bh, |
2221 | int meta_level, |
2222 | int write_sem) |
2223 | { |
2224 | if (write_sem) |
2225 | up_write(sem: &OCFS2_I(inode)->ip_alloc_sem); |
2226 | else |
2227 | up_read(sem: &OCFS2_I(inode)->ip_alloc_sem); |
2228 | |
2229 | brelse(bh: *di_bh); |
2230 | *di_bh = NULL; |
2231 | |
2232 | if (meta_level >= 0) |
2233 | ocfs2_inode_unlock(inode, ex: meta_level); |
2234 | } |
2235 | |
2236 | static int ocfs2_prepare_inode_for_write(struct file *file, |
2237 | loff_t pos, size_t count, int wait) |
2238 | { |
2239 | int ret = 0, meta_level = 0, overwrite_io = 0; |
2240 | int write_sem = 0; |
2241 | struct dentry *dentry = file->f_path.dentry; |
2242 | struct inode *inode = d_inode(dentry); |
2243 | struct buffer_head *di_bh = NULL; |
2244 | u32 cpos; |
2245 | u32 clusters; |
2246 | |
2247 | /* |
2248 | * We start with a read level meta lock and only jump to an ex |
2249 | * if we need to make modifications here. |
2250 | */ |
2251 | for(;;) { |
2252 | ret = ocfs2_inode_lock_for_extent_tree(inode, |
2253 | di_bh: &di_bh, |
2254 | meta_level, |
2255 | write_sem, |
2256 | wait); |
2257 | if (ret < 0) { |
2258 | if (ret != -EAGAIN) |
2259 | mlog_errno(ret); |
2260 | goto out; |
2261 | } |
2262 | |
2263 | /* |
2264 | * Check if IO will overwrite allocated blocks in case |
2265 | * IOCB_NOWAIT flag is set. |
2266 | */ |
2267 | if (!wait && !overwrite_io) { |
2268 | overwrite_io = 1; |
2269 | |
2270 | ret = ocfs2_overwrite_io(inode, di_bh, map_start: pos, map_len: count); |
2271 | if (ret < 0) { |
2272 | if (ret != -EAGAIN) |
2273 | mlog_errno(ret); |
2274 | goto out_unlock; |
2275 | } |
2276 | } |
2277 | |
2278 | /* Clear suid / sgid if necessary. We do this here |
2279 | * instead of later in the write path because |
2280 | * remove_suid() calls ->setattr without any hint that |
2281 | * we may have already done our cluster locking. Since |
2282 | * ocfs2_setattr() *must* take cluster locks to |
2283 | * proceed, this will lead us to recursively lock the |
2284 | * inode. There's also the dinode i_size state which |
2285 | * can be lost via setattr during extending writes (we |
2286 | * set inode->i_size at the end of a write. */ |
2287 | if (setattr_should_drop_suidgid(&nop_mnt_idmap, inode)) { |
2288 | if (meta_level == 0) { |
2289 | ocfs2_inode_unlock_for_extent_tree(inode, |
2290 | di_bh: &di_bh, |
2291 | meta_level, |
2292 | write_sem); |
2293 | meta_level = 1; |
2294 | continue; |
2295 | } |
2296 | |
2297 | ret = ocfs2_write_remove_suid(inode); |
2298 | if (ret < 0) { |
2299 | mlog_errno(ret); |
2300 | goto out_unlock; |
2301 | } |
2302 | } |
2303 | |
2304 | ret = ocfs2_check_range_for_refcount(inode, pos, count); |
2305 | if (ret == 1) { |
2306 | ocfs2_inode_unlock_for_extent_tree(inode, |
2307 | di_bh: &di_bh, |
2308 | meta_level, |
2309 | write_sem); |
2310 | meta_level = 1; |
2311 | write_sem = 1; |
2312 | ret = ocfs2_inode_lock_for_extent_tree(inode, |
2313 | di_bh: &di_bh, |
2314 | meta_level, |
2315 | write_sem, |
2316 | wait); |
2317 | if (ret < 0) { |
2318 | if (ret != -EAGAIN) |
2319 | mlog_errno(ret); |
2320 | goto out; |
2321 | } |
2322 | |
2323 | cpos = pos >> OCFS2_SB(inode->i_sb)->s_clustersize_bits; |
2324 | clusters = |
2325 | ocfs2_clusters_for_bytes(sb: inode->i_sb, bytes: pos + count) - cpos; |
2326 | ret = ocfs2_refcount_cow(inode, di_bh, cpos, write_len: clusters, UINT_MAX); |
2327 | } |
2328 | |
2329 | if (ret < 0) { |
2330 | if (ret != -EAGAIN) |
2331 | mlog_errno(ret); |
2332 | goto out_unlock; |
2333 | } |
2334 | |
2335 | break; |
2336 | } |
2337 | |
2338 | out_unlock: |
2339 | trace_ocfs2_prepare_inode_for_write(ino: OCFS2_I(inode)->ip_blkno, |
2340 | saved_pos: pos, count, wait); |
2341 | |
2342 | ocfs2_inode_unlock_for_extent_tree(inode, |
2343 | di_bh: &di_bh, |
2344 | meta_level, |
2345 | write_sem); |
2346 | |
2347 | out: |
2348 | return ret; |
2349 | } |
2350 | |
2351 | static ssize_t ocfs2_file_write_iter(struct kiocb *iocb, |
2352 | struct iov_iter *from) |
2353 | { |
2354 | int rw_level; |
2355 | ssize_t written = 0; |
2356 | ssize_t ret; |
2357 | size_t count = iov_iter_count(i: from); |
2358 | struct file *file = iocb->ki_filp; |
2359 | struct inode *inode = file_inode(f: file); |
2360 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2361 | int full_coherency = !(osb->s_mount_opt & |
2362 | OCFS2_MOUNT_COHERENCY_BUFFERED); |
2363 | void *saved_ki_complete = NULL; |
2364 | int append_write = ((iocb->ki_pos + count) >= |
2365 | i_size_read(inode) ? 1 : 0); |
2366 | int direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0; |
2367 | int nowait = iocb->ki_flags & IOCB_NOWAIT ? 1 : 0; |
2368 | |
2369 | trace_ocfs2_file_write_iter(inode, file, dentry: file->f_path.dentry, |
2370 | ino: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
2371 | d_len: file->f_path.dentry->d_name.len, |
2372 | d_name: file->f_path.dentry->d_name.name, |
2373 | mode: (unsigned int)from->nr_segs); /* GRRRRR */ |
2374 | |
2375 | if (!direct_io && nowait) |
2376 | return -EOPNOTSUPP; |
2377 | |
2378 | if (count == 0) |
2379 | return 0; |
2380 | |
2381 | if (nowait) { |
2382 | if (!inode_trylock(inode)) |
2383 | return -EAGAIN; |
2384 | } else |
2385 | inode_lock(inode); |
2386 | |
2387 | /* |
2388 | * Concurrent O_DIRECT writes are allowed with |
2389 | * mount_option "coherency=buffered". |
2390 | * For append write, we must take rw EX. |
2391 | */ |
2392 | rw_level = (!direct_io || full_coherency || append_write); |
2393 | |
2394 | if (nowait) |
2395 | ret = ocfs2_try_rw_lock(inode, write: rw_level); |
2396 | else |
2397 | ret = ocfs2_rw_lock(inode, write: rw_level); |
2398 | if (ret < 0) { |
2399 | if (ret != -EAGAIN) |
2400 | mlog_errno(ret); |
2401 | goto out_mutex; |
2402 | } |
2403 | |
2404 | /* |
2405 | * O_DIRECT writes with "coherency=full" need to take EX cluster |
2406 | * inode_lock to guarantee coherency. |
2407 | */ |
2408 | if (direct_io && full_coherency) { |
2409 | /* |
2410 | * We need to take and drop the inode lock to force |
2411 | * other nodes to drop their caches. Buffered I/O |
2412 | * already does this in write_begin(). |
2413 | */ |
2414 | if (nowait) |
2415 | ret = ocfs2_try_inode_lock(inode, NULL, 1); |
2416 | else |
2417 | ret = ocfs2_inode_lock(inode, NULL, 1); |
2418 | if (ret < 0) { |
2419 | if (ret != -EAGAIN) |
2420 | mlog_errno(ret); |
2421 | goto out; |
2422 | } |
2423 | |
2424 | ocfs2_inode_unlock(inode, ex: 1); |
2425 | } |
2426 | |
2427 | ret = generic_write_checks(iocb, from); |
2428 | if (ret <= 0) { |
2429 | if (ret) |
2430 | mlog_errno(ret); |
2431 | goto out; |
2432 | } |
2433 | count = ret; |
2434 | |
2435 | ret = ocfs2_prepare_inode_for_write(file, pos: iocb->ki_pos, count, wait: !nowait); |
2436 | if (ret < 0) { |
2437 | if (ret != -EAGAIN) |
2438 | mlog_errno(ret); |
2439 | goto out; |
2440 | } |
2441 | |
2442 | if (direct_io && !is_sync_kiocb(kiocb: iocb) && |
2443 | ocfs2_is_io_unaligned(inode, count, pos: iocb->ki_pos)) { |
2444 | /* |
2445 | * Make it a sync io if it's an unaligned aio. |
2446 | */ |
2447 | saved_ki_complete = xchg(&iocb->ki_complete, NULL); |
2448 | } |
2449 | |
2450 | /* communicate with ocfs2_dio_end_io */ |
2451 | ocfs2_iocb_set_rw_locked(iocb, level: rw_level); |
2452 | |
2453 | written = __generic_file_write_iter(iocb, from); |
2454 | /* buffered aio wouldn't have proper lock coverage today */ |
2455 | BUG_ON(written == -EIOCBQUEUED && !direct_io); |
2456 | |
2457 | /* |
2458 | * deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io |
2459 | * function pointer which is called when o_direct io completes so that |
2460 | * it can unlock our rw lock. |
2461 | * Unfortunately there are error cases which call end_io and others |
2462 | * that don't. so we don't have to unlock the rw_lock if either an |
2463 | * async dio is going to do it in the future or an end_io after an |
2464 | * error has already done it. |
2465 | */ |
2466 | if ((written == -EIOCBQUEUED) || (!ocfs2_iocb_is_rw_locked(iocb))) { |
2467 | rw_level = -1; |
2468 | } |
2469 | |
2470 | if (unlikely(written <= 0)) |
2471 | goto out; |
2472 | |
2473 | if (((file->f_flags & O_DSYNC) && !direct_io) || |
2474 | IS_SYNC(inode)) { |
2475 | ret = filemap_fdatawrite_range(mapping: file->f_mapping, |
2476 | start: iocb->ki_pos - written, |
2477 | end: iocb->ki_pos - 1); |
2478 | if (ret < 0) |
2479 | written = ret; |
2480 | |
2481 | if (!ret) { |
2482 | ret = jbd2_journal_force_commit(osb->journal->j_journal); |
2483 | if (ret < 0) |
2484 | written = ret; |
2485 | } |
2486 | |
2487 | if (!ret) |
2488 | ret = filemap_fdatawait_range(file->f_mapping, |
2489 | lstart: iocb->ki_pos - written, |
2490 | lend: iocb->ki_pos - 1); |
2491 | } |
2492 | |
2493 | out: |
2494 | if (saved_ki_complete) |
2495 | xchg(&iocb->ki_complete, saved_ki_complete); |
2496 | |
2497 | if (rw_level != -1) |
2498 | ocfs2_rw_unlock(inode, write: rw_level); |
2499 | |
2500 | out_mutex: |
2501 | inode_unlock(inode); |
2502 | |
2503 | if (written) |
2504 | ret = written; |
2505 | return ret; |
2506 | } |
2507 | |
2508 | static ssize_t ocfs2_file_read_iter(struct kiocb *iocb, |
2509 | struct iov_iter *to) |
2510 | { |
2511 | int ret = 0, rw_level = -1, lock_level = 0; |
2512 | struct file *filp = iocb->ki_filp; |
2513 | struct inode *inode = file_inode(f: filp); |
2514 | int direct_io = iocb->ki_flags & IOCB_DIRECT ? 1 : 0; |
2515 | int nowait = iocb->ki_flags & IOCB_NOWAIT ? 1 : 0; |
2516 | |
2517 | trace_ocfs2_file_read_iter(inode, file: filp, dentry: filp->f_path.dentry, |
2518 | ino: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
2519 | d_len: filp->f_path.dentry->d_name.len, |
2520 | d_name: filp->f_path.dentry->d_name.name, |
2521 | mode: to->nr_segs); /* GRRRRR */ |
2522 | |
2523 | |
2524 | if (!inode) { |
2525 | ret = -EINVAL; |
2526 | mlog_errno(ret); |
2527 | goto bail; |
2528 | } |
2529 | |
2530 | if (!direct_io && nowait) |
2531 | return -EOPNOTSUPP; |
2532 | |
2533 | /* |
2534 | * buffered reads protect themselves in ->read_folio(). O_DIRECT reads |
2535 | * need locks to protect pending reads from racing with truncate. |
2536 | */ |
2537 | if (direct_io) { |
2538 | if (nowait) |
2539 | ret = ocfs2_try_rw_lock(inode, write: 0); |
2540 | else |
2541 | ret = ocfs2_rw_lock(inode, write: 0); |
2542 | |
2543 | if (ret < 0) { |
2544 | if (ret != -EAGAIN) |
2545 | mlog_errno(ret); |
2546 | goto bail; |
2547 | } |
2548 | rw_level = 0; |
2549 | /* communicate with ocfs2_dio_end_io */ |
2550 | ocfs2_iocb_set_rw_locked(iocb, level: rw_level); |
2551 | } |
2552 | |
2553 | /* |
2554 | * We're fine letting folks race truncates and extending |
2555 | * writes with read across the cluster, just like they can |
2556 | * locally. Hence no rw_lock during read. |
2557 | * |
2558 | * Take and drop the meta data lock to update inode fields |
2559 | * like i_size. This allows the checks down below |
2560 | * copy_splice_read() a chance of actually working. |
2561 | */ |
2562 | ret = ocfs2_inode_lock_atime(inode, vfsmnt: filp->f_path.mnt, level: &lock_level, |
2563 | wait: !nowait); |
2564 | if (ret < 0) { |
2565 | if (ret != -EAGAIN) |
2566 | mlog_errno(ret); |
2567 | goto bail; |
2568 | } |
2569 | ocfs2_inode_unlock(inode, ex: lock_level); |
2570 | |
2571 | ret = generic_file_read_iter(iocb, to); |
2572 | trace_generic_file_read_iter_ret(num: ret); |
2573 | |
2574 | /* buffered aio wouldn't have proper lock coverage today */ |
2575 | BUG_ON(ret == -EIOCBQUEUED && !direct_io); |
2576 | |
2577 | /* see ocfs2_file_write_iter */ |
2578 | if (ret == -EIOCBQUEUED || !ocfs2_iocb_is_rw_locked(iocb)) { |
2579 | rw_level = -1; |
2580 | } |
2581 | |
2582 | bail: |
2583 | if (rw_level != -1) |
2584 | ocfs2_rw_unlock(inode, write: rw_level); |
2585 | |
2586 | return ret; |
2587 | } |
2588 | |
2589 | static ssize_t ocfs2_file_splice_read(struct file *in, loff_t *ppos, |
2590 | struct pipe_inode_info *pipe, |
2591 | size_t len, unsigned int flags) |
2592 | { |
2593 | struct inode *inode = file_inode(f: in); |
2594 | ssize_t ret = 0; |
2595 | int lock_level = 0; |
2596 | |
2597 | trace_ocfs2_file_splice_read(inode, file: in, dentry: in->f_path.dentry, |
2598 | ino: (unsigned long long)OCFS2_I(inode)->ip_blkno, |
2599 | d_len: in->f_path.dentry->d_name.len, |
2600 | d_name: in->f_path.dentry->d_name.name, |
2601 | mode: flags); |
2602 | |
2603 | /* |
2604 | * We're fine letting folks race truncates and extending writes with |
2605 | * read across the cluster, just like they can locally. Hence no |
2606 | * rw_lock during read. |
2607 | * |
2608 | * Take and drop the meta data lock to update inode fields like i_size. |
2609 | * This allows the checks down below filemap_splice_read() a chance of |
2610 | * actually working. |
2611 | */ |
2612 | ret = ocfs2_inode_lock_atime(inode, vfsmnt: in->f_path.mnt, level: &lock_level, wait: 1); |
2613 | if (ret < 0) { |
2614 | if (ret != -EAGAIN) |
2615 | mlog_errno(ret); |
2616 | goto bail; |
2617 | } |
2618 | ocfs2_inode_unlock(inode, ex: lock_level); |
2619 | |
2620 | ret = filemap_splice_read(in, ppos, pipe, len, flags); |
2621 | trace_filemap_splice_read_ret(num: ret); |
2622 | bail: |
2623 | return ret; |
2624 | } |
2625 | |
2626 | /* Refer generic_file_llseek_unlocked() */ |
2627 | static loff_t ocfs2_file_llseek(struct file *file, loff_t offset, int whence) |
2628 | { |
2629 | struct inode *inode = file->f_mapping->host; |
2630 | int ret = 0; |
2631 | |
2632 | inode_lock(inode); |
2633 | |
2634 | switch (whence) { |
2635 | case SEEK_SET: |
2636 | break; |
2637 | case SEEK_END: |
2638 | /* SEEK_END requires the OCFS2 inode lock for the file |
2639 | * because it references the file's size. |
2640 | */ |
2641 | ret = ocfs2_inode_lock(inode, NULL, 0); |
2642 | if (ret < 0) { |
2643 | mlog_errno(ret); |
2644 | goto out; |
2645 | } |
2646 | offset += i_size_read(inode); |
2647 | ocfs2_inode_unlock(inode, ex: 0); |
2648 | break; |
2649 | case SEEK_CUR: |
2650 | if (offset == 0) { |
2651 | offset = file->f_pos; |
2652 | goto out; |
2653 | } |
2654 | offset += file->f_pos; |
2655 | break; |
2656 | case SEEK_DATA: |
2657 | case SEEK_HOLE: |
2658 | ret = ocfs2_seek_data_hole_offset(file, offset: &offset, origin: whence); |
2659 | if (ret) |
2660 | goto out; |
2661 | break; |
2662 | default: |
2663 | ret = -EINVAL; |
2664 | goto out; |
2665 | } |
2666 | |
2667 | offset = vfs_setpos(file, offset, maxsize: inode->i_sb->s_maxbytes); |
2668 | |
2669 | out: |
2670 | inode_unlock(inode); |
2671 | if (ret) |
2672 | return ret; |
2673 | return offset; |
2674 | } |
2675 | |
2676 | static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in, |
2677 | struct file *file_out, loff_t pos_out, |
2678 | loff_t len, unsigned int remap_flags) |
2679 | { |
2680 | struct inode *inode_in = file_inode(f: file_in); |
2681 | struct inode *inode_out = file_inode(f: file_out); |
2682 | struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb); |
2683 | struct buffer_head *in_bh = NULL, *out_bh = NULL; |
2684 | bool same_inode = (inode_in == inode_out); |
2685 | loff_t remapped = 0; |
2686 | ssize_t ret; |
2687 | |
2688 | if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY)) |
2689 | return -EINVAL; |
2690 | if (!ocfs2_refcount_tree(osb)) |
2691 | return -EOPNOTSUPP; |
2692 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
2693 | return -EROFS; |
2694 | |
2695 | /* Lock both files against IO */ |
2696 | ret = ocfs2_reflink_inodes_lock(s_inode: inode_in, bh1: &in_bh, t_inode: inode_out, bh2: &out_bh); |
2697 | if (ret) |
2698 | return ret; |
2699 | |
2700 | /* Check file eligibility and prepare for block sharing. */ |
2701 | ret = -EINVAL; |
2702 | if ((OCFS2_I(inode: inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) || |
2703 | (OCFS2_I(inode: inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE)) |
2704 | goto out_unlock; |
2705 | |
2706 | ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out, |
2707 | count: &len, remap_flags); |
2708 | if (ret < 0 || len == 0) |
2709 | goto out_unlock; |
2710 | |
2711 | /* Lock out changes to the allocation maps and remap. */ |
2712 | down_write(sem: &OCFS2_I(inode: inode_in)->ip_alloc_sem); |
2713 | if (!same_inode) |
2714 | down_write_nested(sem: &OCFS2_I(inode: inode_out)->ip_alloc_sem, |
2715 | SINGLE_DEPTH_NESTING); |
2716 | |
2717 | /* Zap any page cache for the destination file's range. */ |
2718 | truncate_inode_pages_range(&inode_out->i_data, |
2719 | round_down(pos_out, PAGE_SIZE), |
2720 | round_up(pos_out + len, PAGE_SIZE) - 1); |
2721 | |
2722 | remapped = ocfs2_reflink_remap_blocks(s_inode: inode_in, s_bh: in_bh, pos_in, |
2723 | t_inode: inode_out, t_bh: out_bh, pos_out, len); |
2724 | up_write(sem: &OCFS2_I(inode: inode_in)->ip_alloc_sem); |
2725 | if (!same_inode) |
2726 | up_write(sem: &OCFS2_I(inode: inode_out)->ip_alloc_sem); |
2727 | if (remapped < 0) { |
2728 | ret = remapped; |
2729 | mlog_errno(ret); |
2730 | goto out_unlock; |
2731 | } |
2732 | |
2733 | /* |
2734 | * Empty the extent map so that we may get the right extent |
2735 | * record from the disk. |
2736 | */ |
2737 | ocfs2_extent_map_trunc(inode: inode_in, cluster: 0); |
2738 | ocfs2_extent_map_trunc(inode: inode_out, cluster: 0); |
2739 | |
2740 | ret = ocfs2_reflink_update_dest(dest: inode_out, d_bh: out_bh, newlen: pos_out + len); |
2741 | if (ret) { |
2742 | mlog_errno(ret); |
2743 | goto out_unlock; |
2744 | } |
2745 | |
2746 | out_unlock: |
2747 | ocfs2_reflink_inodes_unlock(s_inode: inode_in, s_bh: in_bh, t_inode: inode_out, t_bh: out_bh); |
2748 | return remapped > 0 ? remapped : ret; |
2749 | } |
2750 | |
2751 | const struct inode_operations ocfs2_file_iops = { |
2752 | .setattr = ocfs2_setattr, |
2753 | .getattr = ocfs2_getattr, |
2754 | .permission = ocfs2_permission, |
2755 | .listxattr = ocfs2_listxattr, |
2756 | .fiemap = ocfs2_fiemap, |
2757 | .get_inode_acl = ocfs2_iop_get_acl, |
2758 | .set_acl = ocfs2_iop_set_acl, |
2759 | .fileattr_get = ocfs2_fileattr_get, |
2760 | .fileattr_set = ocfs2_fileattr_set, |
2761 | }; |
2762 | |
2763 | const struct inode_operations ocfs2_special_file_iops = { |
2764 | .setattr = ocfs2_setattr, |
2765 | .getattr = ocfs2_getattr, |
2766 | .listxattr = ocfs2_listxattr, |
2767 | .permission = ocfs2_permission, |
2768 | .get_inode_acl = ocfs2_iop_get_acl, |
2769 | .set_acl = ocfs2_iop_set_acl, |
2770 | }; |
2771 | |
2772 | /* |
2773 | * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with |
2774 | * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks! |
2775 | */ |
2776 | const struct file_operations ocfs2_fops = { |
2777 | .llseek = ocfs2_file_llseek, |
2778 | .mmap = ocfs2_mmap, |
2779 | .fsync = ocfs2_sync_file, |
2780 | .release = ocfs2_file_release, |
2781 | .open = ocfs2_file_open, |
2782 | .read_iter = ocfs2_file_read_iter, |
2783 | .write_iter = ocfs2_file_write_iter, |
2784 | .unlocked_ioctl = ocfs2_ioctl, |
2785 | #ifdef CONFIG_COMPAT |
2786 | .compat_ioctl = ocfs2_compat_ioctl, |
2787 | #endif |
2788 | .lock = ocfs2_lock, |
2789 | .flock = ocfs2_flock, |
2790 | .splice_read = ocfs2_file_splice_read, |
2791 | .splice_write = iter_file_splice_write, |
2792 | .fallocate = ocfs2_fallocate, |
2793 | .remap_file_range = ocfs2_remap_file_range, |
2794 | }; |
2795 | |
2796 | WRAP_DIR_ITER(ocfs2_readdir) // FIXME! |
2797 | const struct file_operations ocfs2_dops = { |
2798 | .llseek = generic_file_llseek, |
2799 | .read = generic_read_dir, |
2800 | .iterate_shared = shared_ocfs2_readdir, |
2801 | .fsync = ocfs2_sync_file, |
2802 | .release = ocfs2_dir_release, |
2803 | .open = ocfs2_dir_open, |
2804 | .unlocked_ioctl = ocfs2_ioctl, |
2805 | #ifdef CONFIG_COMPAT |
2806 | .compat_ioctl = ocfs2_compat_ioctl, |
2807 | #endif |
2808 | .lock = ocfs2_lock, |
2809 | .flock = ocfs2_flock, |
2810 | }; |
2811 | |
2812 | /* |
2813 | * POSIX-lockless variants of our file_operations. |
2814 | * |
2815 | * These will be used if the underlying cluster stack does not support |
2816 | * posix file locking, if the user passes the "localflocks" mount |
2817 | * option, or if we have a local-only fs. |
2818 | * |
2819 | * ocfs2_flock is in here because all stacks handle UNIX file locks, |
2820 | * so we still want it in the case of no stack support for |
2821 | * plocks. Internally, it will do the right thing when asked to ignore |
2822 | * the cluster. |
2823 | */ |
2824 | const struct file_operations ocfs2_fops_no_plocks = { |
2825 | .llseek = ocfs2_file_llseek, |
2826 | .mmap = ocfs2_mmap, |
2827 | .fsync = ocfs2_sync_file, |
2828 | .release = ocfs2_file_release, |
2829 | .open = ocfs2_file_open, |
2830 | .read_iter = ocfs2_file_read_iter, |
2831 | .write_iter = ocfs2_file_write_iter, |
2832 | .unlocked_ioctl = ocfs2_ioctl, |
2833 | #ifdef CONFIG_COMPAT |
2834 | .compat_ioctl = ocfs2_compat_ioctl, |
2835 | #endif |
2836 | .flock = ocfs2_flock, |
2837 | .splice_read = filemap_splice_read, |
2838 | .splice_write = iter_file_splice_write, |
2839 | .fallocate = ocfs2_fallocate, |
2840 | .remap_file_range = ocfs2_remap_file_range, |
2841 | }; |
2842 | |
2843 | const struct file_operations ocfs2_dops_no_plocks = { |
2844 | .llseek = generic_file_llseek, |
2845 | .read = generic_read_dir, |
2846 | .iterate_shared = shared_ocfs2_readdir, |
2847 | .fsync = ocfs2_sync_file, |
2848 | .release = ocfs2_dir_release, |
2849 | .open = ocfs2_dir_open, |
2850 | .unlocked_ioctl = ocfs2_ioctl, |
2851 | #ifdef CONFIG_COMPAT |
2852 | .compat_ioctl = ocfs2_compat_ioctl, |
2853 | #endif |
2854 | .flock = ocfs2_flock, |
2855 | }; |
2856 | |