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Root/fs/ocfs2/inode.c

1	/* -- mode: c; c-basic-offset: 8; --
2	* vim: noexpandtab sw=8 ts=8 sts=0:
3	*
4	* inode.c
5	*
6	* vfs' aops, fops, dops and iops
7	*
8	* Copyright (C) 2002, 2004 Oracle. All rights reserved.
9	*
10	* This program is free software; you can redistribute it and/or
11	* modify it under the terms of the GNU General Public
12	* License as published by the Free Software Foundation; either
13	* version 2 of the License, or (at your option) any later version.
14	*
15	* This program is distributed in the hope that it will be useful,
16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18	* General Public License for more details.
19	*
20	* You should have received a copy of the GNU General Public
21	* License along with this program; if not, write to the
22	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23	* Boston, MA 021110-1307, USA.
24	*/
25
26	#include <linux/fs.h>
27	#include <linux/types.h>
28	#include <linux/highmem.h>
29	#include <linux/pagemap.h>
30	#include <linux/quotaops.h>
31
32	#include <asm/byteorder.h>
33
34	#include <cluster/masklog.h>
35
36	#include "ocfs2.h"
37
38	#include "alloc.h"
39	#include "dir.h"
40	#include "blockcheck.h"
41	#include "dlmglue.h"
42	#include "extent_map.h"
43	#include "file.h"
44	#include "heartbeat.h"
45	#include "inode.h"
46	#include "journal.h"
47	#include "namei.h"
48	#include "suballoc.h"
49	#include "super.h"
50	#include "symlink.h"
51	#include "sysfile.h"
52	#include "uptodate.h"
53	#include "xattr.h"
54	#include "refcounttree.h"
55	#include "ocfs2_trace.h"
56
57	#include "buffer_head_io.h"
58
59	struct ocfs2_find_inode_args
60	{
61	u64 fi_blkno;
62	unsigned long fi_ino;
63	unsigned int fi_flags;
64	unsigned int fi_sysfile_type;
65	};
66
67	static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
68
69	static int ocfs2_read_locked_inode(struct inode *inode,
70	struct ocfs2_find_inode_args *args);
71	static int ocfs2_init_locked_inode(struct inode inode, void opaque);
72	static int ocfs2_find_actor(struct inode inode, void opaque);
73	static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
74	struct inode *inode,
75	struct buffer_head *fe_bh);
76
77	void ocfs2_set_inode_flags(struct inode *inode)
78	{
79	unsigned int flags = OCFS2_I(inode)->ip_attr;
80
81	inode->i_flags &= ~(S_IMMUTABLE \|
82	S_SYNC \| S_APPEND \| S_NOATIME \| S_DIRSYNC);
83
84	if (flags & OCFS2_IMMUTABLE_FL)
85	inode->i_flags \|= S_IMMUTABLE;
86
87	if (flags & OCFS2_SYNC_FL)
88	inode->i_flags \|= S_SYNC;
89	if (flags & OCFS2_APPEND_FL)
90	inode->i_flags \|= S_APPEND;
91	if (flags & OCFS2_NOATIME_FL)
92	inode->i_flags \|= S_NOATIME;
93	if (flags & OCFS2_DIRSYNC_FL)
94	inode->i_flags \|= S_DIRSYNC;
95	}
96
97	/* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
98	void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
99	{
100	unsigned int flags = oi->vfs_inode.i_flags;
101
102	oi->ip_attr &= ~(OCFS2_SYNC_FL\|OCFS2_APPEND_FL\|
103	OCFS2_IMMUTABLE_FL\|OCFS2_NOATIME_FL\|OCFS2_DIRSYNC_FL);
104	if (flags & S_SYNC)
105	oi->ip_attr \|= OCFS2_SYNC_FL;
106	if (flags & S_APPEND)
107	oi->ip_attr \|= OCFS2_APPEND_FL;
108	if (flags & S_IMMUTABLE)
109	oi->ip_attr \|= OCFS2_IMMUTABLE_FL;
110	if (flags & S_NOATIME)
111	oi->ip_attr \|= OCFS2_NOATIME_FL;
112	if (flags & S_DIRSYNC)
113	oi->ip_attr \|= OCFS2_DIRSYNC_FL;
114	}
115
116	struct inode ocfs2_ilookup(struct super_block sb, u64 blkno)
117	{
118	struct ocfs2_find_inode_args args;
119
120	args.fi_blkno = blkno;
121	args.fi_flags = 0;
122	args.fi_ino = ino_from_blkno(sb, blkno);
123	args.fi_sysfile_type = 0;
124
125	return ilookup5(sb, blkno, ocfs2_find_actor, &args);
126	}
127	struct inode ocfs2_iget(struct ocfs2_super osb, u64 blkno, unsigned flags,
128	int sysfile_type)
129	{
130	struct inode *inode = NULL;
131	struct super_block *sb = osb->sb;
132	struct ocfs2_find_inode_args args;
133
134	trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
135	sysfile_type);
136
137	/* Ok. By now we've either got the offsets passed to us by the
138	* caller, or we just pulled them off the bh. Lets do some
139	* sanity checks to make sure they're OK. */
140	if (blkno == 0) {
141	inode = ERR_PTR(-EINVAL);
142	mlog_errno(PTR_ERR(inode));
143	goto bail;
144	}
145
146	args.fi_blkno = blkno;
147	args.fi_flags = flags;
148	args.fi_ino = ino_from_blkno(sb, blkno);
149	args.fi_sysfile_type = sysfile_type;
150
151	inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
152	ocfs2_init_locked_inode, &args);
153	/* inode was not in the inode cache. 2.6.x requires
154	* us to do our own read_inode call and unlock it
155	* afterwards. */
156	if (inode == NULL) {
157	inode = ERR_PTR(-ENOMEM);
158	mlog_errno(PTR_ERR(inode));
159	goto bail;
160	}
161	trace_ocfs2_iget5_locked(inode->i_state);
162	if (inode->i_state & I_NEW) {
163	ocfs2_read_locked_inode(inode, &args);
164	unlock_new_inode(inode);
165	}
166	if (is_bad_inode(inode)) {
167	iput(inode);
168	inode = ERR_PTR(-ESTALE);
169	goto bail;
170	}
171
172	bail:
173	if (!IS_ERR(inode)) {
174	trace_ocfs2_iget_end(inode,
175	(unsigned long long)OCFS2_I(inode)->ip_blkno);
176	}
177
178	return inode;
179	}
180
181
182	/*
183	* here's how inodes get read from disk:
184	* iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
185	* found? : return the in-memory inode
186	* not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
187	*/
188
189	static int ocfs2_find_actor(struct inode inode, void opaque)
190	{
191	struct ocfs2_find_inode_args *args = NULL;
192	struct ocfs2_inode_info *oi = OCFS2_I(inode);
193	int ret = 0;
194
195	args = opaque;
196
197	mlog_bug_on_msg(!inode, "No inode in find actor!\n");
198
199	trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno);
200
201	if (oi->ip_blkno != args->fi_blkno)
202	goto bail;
203
204	ret = 1;
205	bail:
206	return ret;
207	}
208
209	/*
210	* initialize the new inode, but don't do anything that would cause
211	* us to sleep.
212	* return 0 on success, 1 on failure
213	*/
214	static int ocfs2_init_locked_inode(struct inode inode, void opaque)
215	{
216	struct ocfs2_find_inode_args *args = opaque;
217	static struct lock_class_key ocfs2_quota_ip_alloc_sem_key,
218	ocfs2_file_ip_alloc_sem_key;
219
220	inode->i_ino = args->fi_ino;
221	OCFS2_I(inode)->ip_blkno = args->fi_blkno;
222	if (args->fi_sysfile_type != 0)
223	lockdep_set_class(&inode->i_mutex,
224	&ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
225	if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE \|\|
226	args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE \|\|
227	args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE \|\|
228	args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE)
229	lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
230	&ocfs2_quota_ip_alloc_sem_key);
231	else
232	lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
233	&ocfs2_file_ip_alloc_sem_key);
234
235	return 0;
236	}
237
238	void ocfs2_populate_inode(struct inode inode, struct ocfs2_dinode fe,
239	int create_ino)
240	{
241	struct super_block *sb;
242	struct ocfs2_super *osb;
243	int use_plocks = 1;
244
245	sb = inode->i_sb;
246	osb = OCFS2_SB(sb);
247
248	if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) \|\|
249	ocfs2_mount_local(osb) \|\| !ocfs2_stack_supports_plocks())
250	use_plocks = 0;
251
252	/*
253	* These have all been checked by ocfs2_read_inode_block() or set
254	* by ocfs2_mknod_locked(), so a failure is a code bug.
255	*/
256	BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); /* This means that read_inode
257	cannot create a superblock
258	inode today. change if
259	that is needed. */
260	BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
261	BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
262
263
264	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
265	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
266	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
267
268	inode->i_version = 1;
269	inode->i_generation = le32_to_cpu(fe->i_generation);
270	inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
271	inode->i_mode = le16_to_cpu(fe->i_mode);
272	inode->i_uid = le32_to_cpu(fe->i_uid);
273	inode->i_gid = le32_to_cpu(fe->i_gid);
274
275	/* Fast symlinks will have i_size but no allocated clusters. */
276	if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
277	inode->i_blocks = 0;
278	else
279	inode->i_blocks = ocfs2_inode_sector_count(inode);
280	inode->i_mapping->a_ops = &ocfs2_aops;
281	inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
282	inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
283	inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
284	inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
285	inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
286	inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
287
288	if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
289	mlog(ML_ERROR,
290	"ip_blkno %llu != i_blkno %llu!\n",
291	(unsigned long long)OCFS2_I(inode)->ip_blkno,
292	(unsigned long long)le64_to_cpu(fe->i_blkno));
293
294	inode->i_nlink = ocfs2_read_links_count(fe);
295
296	trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
297	le32_to_cpu(fe->i_flags));
298	if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
299	OCFS2_I(inode)->ip_flags \|= OCFS2_INODE_SYSTEM_FILE;
300	inode->i_flags \|= S_NOQUOTA;
301	}
302
303	if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
304	OCFS2_I(inode)->ip_flags \|= OCFS2_INODE_BITMAP;
305	} else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
306	OCFS2_I(inode)->ip_flags \|= OCFS2_INODE_BITMAP;
307	} else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
308	inode->i_flags \|= S_NOQUOTA;
309	} else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
310	/* we can't actually hit this as read_inode can't
311	* handle superblocks today ;-) */
312	BUG();
313	}
314
315	switch (inode->i_mode & S_IFMT) {
316	case S_IFREG:
317	if (use_plocks)
318	inode->i_fop = &ocfs2_fops;
319	else
320	inode->i_fop = &ocfs2_fops_no_plocks;
321	inode->i_op = &ocfs2_file_iops;
322	i_size_write(inode, le64_to_cpu(fe->i_size));
323	break;
324	case S_IFDIR:
325	inode->i_op = &ocfs2_dir_iops;
326	if (use_plocks)
327	inode->i_fop = &ocfs2_dops;
328	else
329	inode->i_fop = &ocfs2_dops_no_plocks;
330	i_size_write(inode, le64_to_cpu(fe->i_size));
331	OCFS2_I(inode)->ip_dir_lock_gen = 1;
332	break;
333	case S_IFLNK:
334	if (ocfs2_inode_is_fast_symlink(inode))
335	inode->i_op = &ocfs2_fast_symlink_inode_operations;
336	else
337	inode->i_op = &ocfs2_symlink_inode_operations;
338	i_size_write(inode, le64_to_cpu(fe->i_size));
339	break;
340	default:
341	inode->i_op = &ocfs2_special_file_iops;
342	init_special_inode(inode, inode->i_mode,
343	inode->i_rdev);
344	break;
345	}
346
347	if (create_ino) {
348	inode->i_ino = ino_from_blkno(inode->i_sb,
349	le64_to_cpu(fe->i_blkno));
350
351	/*
352	* If we ever want to create system files from kernel,
353	* the generation argument to
354	* ocfs2_inode_lock_res_init() will have to change.
355	*/
356	BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
357
358	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
359	OCFS2_LOCK_TYPE_META, 0, inode);
360
361	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
362	OCFS2_LOCK_TYPE_OPEN, 0, inode);
363	}
364
365	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
366	OCFS2_LOCK_TYPE_RW, inode->i_generation,
367	inode);
368
369	ocfs2_set_inode_flags(inode);
370
371	OCFS2_I(inode)->ip_last_used_slot = 0;
372	OCFS2_I(inode)->ip_last_used_group = 0;
373
374	if (S_ISDIR(inode->i_mode))
375	ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
376	OCFS2_RESV_FLAG_DIR);
377	}
378
379	static int ocfs2_read_locked_inode(struct inode *inode,
380	struct ocfs2_find_inode_args *args)
381	{
382	struct super_block *sb;
383	struct ocfs2_super *osb;
384	struct ocfs2_dinode *fe;
385	struct buffer_head *bh = NULL;
386	int status, can_lock;
387	u32 generation = 0;
388
389	status = -EINVAL;
390	if (inode == NULL \|\| inode->i_sb == NULL) {
391	mlog(ML_ERROR, "bad inode\n");
392	return status;
393	}
394	sb = inode->i_sb;
395	osb = OCFS2_SB(sb);
396
397	if (!args) {
398	mlog(ML_ERROR, "bad inode args\n");
399	make_bad_inode(inode);
400	return status;
401	}
402
403	/*
404	* To improve performance of cold-cache inode stats, we take
405	* the cluster lock here if possible.
406	*
407	* Generally, OCFS2 never trusts the contents of an inode
408	* unless it's holding a cluster lock, so taking it here isn't
409	* a correctness issue as much as it is a performance
410	* improvement.
411	*
412	* There are three times when taking the lock is not a good idea:
413	*
414	* 1) During startup, before we have initialized the DLM.
415	*
416	* 2) If we are reading certain system files which never get
417	* cluster locks (local alloc, truncate log).
418	*
419	* 3) If the process doing the iget() is responsible for
420	* orphan dir recovery. We're holding the orphan dir lock and
421	* can get into a deadlock with another process on another
422	* node in ->delete_inode().
423	*
424	* #1 and #2 can be simply solved by never taking the lock
425	* here for system files (which are the only type we read
426	* during mount). It's a heavier approach, but our main
427	* concern is user-accessible files anyway.
428	*
429	* #3 works itself out because we'll eventually take the
430	* cluster lock before trusting anything anyway.
431	*/
432	can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
433	&& !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
434	&& !ocfs2_mount_local(osb);
435
436	trace_ocfs2_read_locked_inode(
437	(unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock);
438
439	/*
440	* To maintain backwards compatibility with older versions of
441	* ocfs2-tools, we still store the generation value for system
442	* files. The only ones that actually matter to userspace are
443	* the journals, but it's easier and inexpensive to just flag
444	* all system files similarly.
445	*/
446	if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
447	generation = osb->fs_generation;
448
449	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
450	OCFS2_LOCK_TYPE_META,
451	generation, inode);
452
453	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
454	OCFS2_LOCK_TYPE_OPEN,
455	0, inode);
456
457	if (can_lock) {
458	status = ocfs2_open_lock(inode);
459	if (status) {
460	make_bad_inode(inode);
461	mlog_errno(status);
462	return status;
463	}
464	status = ocfs2_inode_lock(inode, NULL, 0);
465	if (status) {
466	make_bad_inode(inode);
467	mlog_errno(status);
468	return status;
469	}
470	}
471
472	if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
473	status = ocfs2_try_open_lock(inode, 0);
474	if (status) {
475	make_bad_inode(inode);
476	return status;
477	}
478	}
479
480	if (can_lock) {
481	status = ocfs2_read_inode_block_full(inode, &bh,
482	OCFS2_BH_IGNORE_CACHE);
483	} else {
484	status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
485	/*
486	* If buffer is in jbd, then its checksum may not have been
487	* computed as yet.
488	*/
489	if (!status && !buffer_jbd(bh))
490	status = ocfs2_validate_inode_block(osb->sb, bh);
491	}
492	if (status < 0) {
493	mlog_errno(status);
494	goto bail;
495	}
496
497	status = -EINVAL;
498	fe = (struct ocfs2_dinode *) bh->b_data;
499
500	/*
501	* This is a code bug. Right now the caller needs to
502	* understand whether it is asking for a system file inode or
503	* not so the proper lock names can be built.
504	*/
505	mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
506	!!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
507	"Inode %llu: system file state is ambigous\n",
508	(unsigned long long)args->fi_blkno);
509
510	if (S_ISCHR(le16_to_cpu(fe->i_mode)) \|\|
511	S_ISBLK(le16_to_cpu(fe->i_mode)))
512	inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
513
514	ocfs2_populate_inode(inode, fe, 0);
515
516	BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
517
518	status = 0;
519
520	bail:
521	if (can_lock)
522	ocfs2_inode_unlock(inode, 0);
523
524	if (status < 0)
525	make_bad_inode(inode);
526
527	if (args && bh)
528	brelse(bh);
529
530	return status;
531	}
532
533	void ocfs2_sync_blockdev(struct super_block *sb)
534	{
535	sync_blockdev(sb->s_bdev);
536	}
537
538	static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
539	struct inode *inode,
540	struct buffer_head *fe_bh)
541	{
542	int status = 0;
543	struct ocfs2_dinode *fe;
544	handle_t *handle = NULL;
545
546	fe = (struct ocfs2_dinode *) fe_bh->b_data;
547
548	/*
549	* This check will also skip truncate of inodes with inline
550	* data and fast symlinks.
551	*/
552	if (fe->i_clusters) {
553	if (ocfs2_should_order_data(inode))
554	ocfs2_begin_ordered_truncate(inode, 0);
555
556	handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
557	if (IS_ERR(handle)) {
558	status = PTR_ERR(handle);
559	handle = NULL;
560	mlog_errno(status);
561	goto out;
562	}
563
564	status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
565	fe_bh,
566	OCFS2_JOURNAL_ACCESS_WRITE);
567	if (status < 0) {
568	mlog_errno(status);
569	goto out;
570	}
571
572	i_size_write(inode, 0);
573
574	status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
575	if (status < 0) {
576	mlog_errno(status);
577	goto out;
578	}
579
580	ocfs2_commit_trans(osb, handle);
581	handle = NULL;
582
583	status = ocfs2_commit_truncate(osb, inode, fe_bh);
584	if (status < 0) {
585	mlog_errno(status);
586	goto out;
587	}
588	}
589
590	out:
591	if (handle)
592	ocfs2_commit_trans(osb, handle);
593	return status;
594	}
595
596	static int ocfs2_remove_inode(struct inode *inode,
597	struct buffer_head *di_bh,
598	struct inode *orphan_dir_inode,
599	struct buffer_head *orphan_dir_bh)
600	{
601	int status;
602	struct inode *inode_alloc_inode = NULL;
603	struct buffer_head *inode_alloc_bh = NULL;
604	handle_t *handle;
605	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
606	struct ocfs2_dinode di = (struct ocfs2_dinode ) di_bh->b_data;
607
608	inode_alloc_inode =
609	ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
610	le16_to_cpu(di->i_suballoc_slot));
611	if (!inode_alloc_inode) {
612	status = -EEXIST;
613	mlog_errno(status);
614	goto bail;
615	}
616
617	mutex_lock(&inode_alloc_inode->i_mutex);
618	status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
619	if (status < 0) {
620	mutex_unlock(&inode_alloc_inode->i_mutex);
621
622	mlog_errno(status);
623	goto bail;
624	}
625
626	handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
627	ocfs2_quota_trans_credits(inode->i_sb));
628	if (IS_ERR(handle)) {
629	status = PTR_ERR(handle);
630	mlog_errno(status);
631	goto bail_unlock;
632	}
633
634	if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
635	status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
636	orphan_dir_bh);
637	if (status < 0) {
638	mlog_errno(status);
639	goto bail_commit;
640	}
641	}
642
643	/* set the inodes dtime */
644	status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
645	OCFS2_JOURNAL_ACCESS_WRITE);
646	if (status < 0) {
647	mlog_errno(status);
648	goto bail_commit;
649	}
650
651	di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
652	di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL \| OCFS2_ORPHANED_FL));
653	ocfs2_journal_dirty(handle, di_bh);
654
655	ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
656	dquot_free_inode(inode);
657
658	status = ocfs2_free_dinode(handle, inode_alloc_inode,
659	inode_alloc_bh, di);
660	if (status < 0)
661	mlog_errno(status);
662
663	bail_commit:
664	ocfs2_commit_trans(osb, handle);
665	bail_unlock:
666	ocfs2_inode_unlock(inode_alloc_inode, 1);
667	mutex_unlock(&inode_alloc_inode->i_mutex);
668	brelse(inode_alloc_bh);
669	bail:
670	iput(inode_alloc_inode);
671
672	return status;
673	}
674
675	/*
676	* Serialize with orphan dir recovery. If the process doing
677	* recovery on this orphan dir does an iget() with the dir
678	* i_mutex held, we'll deadlock here. Instead we detect this
679	* and exit early - recovery will wipe this inode for us.
680	*/
681	static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
682	int slot)
683	{
684	int ret = 0;
685
686	spin_lock(&osb->osb_lock);
687	if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
688	ret = -EDEADLK;
689	goto out;
690	}
691	/* This signals to the orphan recovery process that it should
692	* wait for us to handle the wipe. */
693	osb->osb_orphan_wipes[slot]++;
694	out:
695	spin_unlock(&osb->osb_lock);
696	trace_ocfs2_check_orphan_recovery_state(slot, ret);
697	return ret;
698	}
699
700	static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
701	int slot)
702	{
703	spin_lock(&osb->osb_lock);
704	osb->osb_orphan_wipes[slot]--;
705	spin_unlock(&osb->osb_lock);
706
707	wake_up(&osb->osb_wipe_event);
708	}
709
710	static int ocfs2_wipe_inode(struct inode *inode,
711	struct buffer_head *di_bh)
712	{
713	int status, orphaned_slot = -1;
714	struct inode *orphan_dir_inode = NULL;
715	struct buffer_head *orphan_dir_bh = NULL;
716	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
717	struct ocfs2_dinode di = (struct ocfs2_dinode ) di_bh->b_data;
718
719	if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
720	orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
721
722	status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
723	if (status)
724	return status;
725
726	orphan_dir_inode = ocfs2_get_system_file_inode(osb,
727	ORPHAN_DIR_SYSTEM_INODE,
728	orphaned_slot);
729	if (!orphan_dir_inode) {
730	status = -EEXIST;
731	mlog_errno(status);
732	goto bail;
733	}
734
735	/* Lock the orphan dir. The lock will be held for the entire
736	* delete_inode operation. We do this now to avoid races with
737	* recovery completion on other nodes. */
738	mutex_lock(&orphan_dir_inode->i_mutex);
739	status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
740	if (status < 0) {
741	mutex_unlock(&orphan_dir_inode->i_mutex);
742
743	mlog_errno(status);
744	goto bail;
745	}
746	}
747
748	/* we do this while holding the orphan dir lock because we
749	* don't want recovery being run from another node to try an
750	* inode delete underneath us -- this will result in two nodes
751	* truncating the same file! */
752	status = ocfs2_truncate_for_delete(osb, inode, di_bh);
753	if (status < 0) {
754	mlog_errno(status);
755	goto bail_unlock_dir;
756	}
757
758	/* Remove any dir index tree */
759	if (S_ISDIR(inode->i_mode)) {
760	status = ocfs2_dx_dir_truncate(inode, di_bh);
761	if (status) {
762	mlog_errno(status);
763	goto bail_unlock_dir;
764	}
765	}
766
767	/Free extended attribute resources associated with this inode./
768	status = ocfs2_xattr_remove(inode, di_bh);
769	if (status < 0) {
770	mlog_errno(status);
771	goto bail_unlock_dir;
772	}
773
774	status = ocfs2_remove_refcount_tree(inode, di_bh);
775	if (status < 0) {
776	mlog_errno(status);
777	goto bail_unlock_dir;
778	}
779
780	status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
781	orphan_dir_bh);
782	if (status < 0)
783	mlog_errno(status);
784
785	bail_unlock_dir:
786	if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)
787	return status;
788
789	ocfs2_inode_unlock(orphan_dir_inode, 1);
790	mutex_unlock(&orphan_dir_inode->i_mutex);
791	brelse(orphan_dir_bh);
792	bail:
793	iput(orphan_dir_inode);
794	ocfs2_signal_wipe_completion(osb, orphaned_slot);
795
796	return status;
797	}
798
799	/* There is a series of simple checks that should be done before a
800	* trylock is even considered. Encapsulate those in this function. */
801	static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
802	{
803	int ret = 0;
804	struct ocfs2_inode_info *oi = OCFS2_I(inode);
805	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
806
807	trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task,
808	(unsigned long long)oi->ip_blkno,
809	oi->ip_flags);
810
811	/* We shouldn't be getting here for the root directory
812	* inode.. */
813	if (inode == osb->root_inode) {
814	mlog(ML_ERROR, "Skipping delete of root inode.\n");
815	goto bail;
816	}
817
818	/* If we're coming from downconvert_thread we can't go into our own
819	* voting [hello, deadlock city!], so unforuntately we just
820	* have to skip deleting this guy. That's OK though because
821	* the node who's doing the actual deleting should handle it
822	* anyway. */
823	if (current == osb->dc_task)
824	goto bail;
825
826	spin_lock(&oi->ip_lock);
827	/* OCFS2 never deletes system files. This should technically
828	* never get here as system file inodes should always have a
829	* positive link count. */
830	if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
831	mlog(ML_ERROR, "Skipping delete of system file %llu\n",
832	(unsigned long long)oi->ip_blkno);
833	goto bail_unlock;
834	}
835
836	/* If we have allowd wipe of this inode for another node, it
837	* will be marked here so we can safely skip it. Recovery will
838	* cleanup any inodes we might inadvertently skip here. */
839	if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE)
840	goto bail_unlock;
841
842	ret = 1;
843	bail_unlock:
844	spin_unlock(&oi->ip_lock);
845	bail:
846	return ret;
847	}
848
849	/* Query the cluster to determine whether we should wipe an inode from
850	* disk or not.
851	*
852	* Requires the inode to have the cluster lock. */
853	static int ocfs2_query_inode_wipe(struct inode *inode,
854	struct buffer_head *di_bh,
855	int *wipe)
856	{
857	int status = 0, reason = 0;
858	struct ocfs2_inode_info *oi = OCFS2_I(inode);
859	struct ocfs2_dinode *di;
860
861	*wipe = 0;
862
863	trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno,
864	inode->i_nlink);
865
866	/* While we were waiting for the cluster lock in
867	* ocfs2_delete_inode, another node might have asked to delete
868	* the inode. Recheck our flags to catch this. */
869	if (!ocfs2_inode_is_valid_to_delete(inode)) {
870	reason = 1;
871	goto bail;
872	}
873
874	/* Now that we have an up to date inode, we can double check
875	* the link count. */
876	if (inode->i_nlink)
877	goto bail;
878
879	/* Do some basic inode verification... */
880	di = (struct ocfs2_dinode *) di_bh->b_data;
881	if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) &&
882	!(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
883	/*
884	* Inodes in the orphan dir must have ORPHANED_FL. The only
885	* inodes that come back out of the orphan dir are reflink
886	* targets. A reflink target may be moved out of the orphan
887	* dir between the time we scan the directory and the time we
888	* process it. This would lead to HAS_REFCOUNT_FL being set but
889	* ORPHANED_FL not.
890	*/
891	if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) {
892	reason = 2;
893	goto bail;
894	}
895
896	/* for lack of a better error? */
897	status = -EEXIST;
898	mlog(ML_ERROR,
899	"Inode %llu (on-disk %llu) not orphaned! "
900	"Disk flags 0x%x, inode flags 0x%x\n",
901	(unsigned long long)oi->ip_blkno,
902	(unsigned long long)le64_to_cpu(di->i_blkno),
903	le32_to_cpu(di->i_flags), oi->ip_flags);
904	goto bail;
905	}
906
907	/* has someone already deleted us?! baaad... */
908	if (di->i_dtime) {
909	status = -EEXIST;
910	mlog_errno(status);
911	goto bail;
912	}
913
914	/*
915	* This is how ocfs2 determines whether an inode is still live
916	* within the cluster. Every node takes a shared read lock on
917	* the inode open lock in ocfs2_read_locked_inode(). When we
918	* get to ->delete_inode(), each node tries to convert it's
919	* lock to an exclusive. Trylocks are serialized by the inode
920	* meta data lock. If the upconvert succeeds, we know the inode
921	* is no longer live and can be deleted.
922	*
923	* Though we call this with the meta data lock held, the
924	* trylock keeps us from ABBA deadlock.
925	*/
926	status = ocfs2_try_open_lock(inode, 1);
927	if (status == -EAGAIN) {
928	status = 0;
929	reason = 3;
930	goto bail;
931	}
932	if (status < 0) {
933	mlog_errno(status);
934	goto bail;
935	}
936
937	*wipe = 1;
938	trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot));
939
940	bail:
941	trace_ocfs2_query_inode_wipe_end(status, reason);
942	return status;
943	}
944
945	/* Support function for ocfs2_delete_inode. Will help us keep the
946	* inode data in a consistent state for clear_inode. Always truncates
947	* pages, optionally sync's them first. */
948	static void ocfs2_cleanup_delete_inode(struct inode *inode,
949	int sync_data)
950	{
951	trace_ocfs2_cleanup_delete_inode(
952	(unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
953	if (sync_data)
954	write_inode_now(inode, 1);
955	truncate_inode_pages(&inode->i_data, 0);
956	}
957
958	static void ocfs2_delete_inode(struct inode *inode)
959	{
960	int wipe, status;
961	sigset_t oldset;
962	struct buffer_head *di_bh = NULL;
963
964	trace_ocfs2_delete_inode(inode->i_ino,
965	(unsigned long long)OCFS2_I(inode)->ip_blkno,
966	is_bad_inode(inode));
967
968	/* When we fail in read_inode() we mark inode as bad. The second test
969	* catches the case when inode allocation fails before allocating
970	* a block for inode. */
971	if (is_bad_inode(inode) \|\| !OCFS2_I(inode)->ip_blkno)
972	goto bail;
973
974	dquot_initialize(inode);
975
976	if (!ocfs2_inode_is_valid_to_delete(inode)) {
977	/* It's probably not necessary to truncate_inode_pages
978	* here but we do it for safety anyway (it will most
979	* likely be a no-op anyway) */
980	ocfs2_cleanup_delete_inode(inode, 0);
981	goto bail;
982	}
983
984	/* We want to block signals in delete_inode as the lock and
985	* messaging paths may return us -ERESTARTSYS. Which would
986	* cause us to exit early, resulting in inodes being orphaned
987	* forever. */
988	ocfs2_block_signals(&oldset);
989
990	/*
991	* Synchronize us against ocfs2_get_dentry. We take this in
992	* shared mode so that all nodes can still concurrently
993	* process deletes.
994	*/
995	status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0);
996	if (status < 0) {
997	mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status);
998	ocfs2_cleanup_delete_inode(inode, 0);
999	goto bail_unblock;
1000	}
1001	/* Lock down the inode. This gives us an up to date view of
1002	* it's metadata (for verification), and allows us to
1003	* serialize delete_inode on multiple nodes.
1004	*
1005	* Even though we might be doing a truncate, we don't take the
1006	* allocation lock here as it won't be needed - nobody will
1007	* have the file open.
1008	*/
1009	status = ocfs2_inode_lock(inode, &di_bh, 1);
1010	if (status < 0) {
1011	if (status != -ENOENT)
1012	mlog_errno(status);
1013	ocfs2_cleanup_delete_inode(inode, 0);
1014	goto bail_unlock_nfs_sync;
1015	}
1016
1017	/* Query the cluster. This will be the final decision made
1018	* before we go ahead and wipe the inode. */
1019	status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
1020	if (!wipe \|\| status < 0) {
1021	/* Error and remote inode busy both mean we won't be
1022	* removing the inode, so they take almost the same
1023	* path. */
1024	if (status < 0)
1025	mlog_errno(status);
1026
1027	/* Someone in the cluster has disallowed a wipe of
1028	* this inode, or it was never completely
1029	* orphaned. Write out the pages and exit now. */
1030	ocfs2_cleanup_delete_inode(inode, 1);
1031	goto bail_unlock_inode;
1032	}
1033
1034	ocfs2_cleanup_delete_inode(inode, 0);
1035
1036	status = ocfs2_wipe_inode(inode, di_bh);
1037	if (status < 0) {
1038	if (status != -EDEADLK)
1039	mlog_errno(status);
1040	goto bail_unlock_inode;
1041	}
1042
1043	/*
1044	* Mark the inode as successfully deleted.
1045	*
1046	* This is important for ocfs2_clear_inode() as it will check
1047	* this flag and skip any checkpointing work
1048	*
1049	* ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1050	* the LVB for other nodes.
1051	*/
1052	OCFS2_I(inode)->ip_flags \|= OCFS2_INODE_DELETED;
1053
1054	bail_unlock_inode:
1055	ocfs2_inode_unlock(inode, 1);
1056	brelse(di_bh);
1057
1058	bail_unlock_nfs_sync:
1059	ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0);
1060
1061	bail_unblock:
1062	ocfs2_unblock_signals(&oldset);
1063	bail:
1064	return;
1065	}
1066
1067	static void ocfs2_clear_inode(struct inode *inode)
1068	{
1069	int status;
1070	struct ocfs2_inode_info *oi = OCFS2_I(inode);
1071
1072	end_writeback(inode);
1073	trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno,
1074	inode->i_nlink);
1075
1076	mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1077	"Inode=%lu\n", inode->i_ino);
1078
1079	dquot_drop(inode);
1080
1081	/* To preven remote deletes we hold open lock before, now it
1082	* is time to unlock PR and EX open locks. */
1083	ocfs2_open_unlock(inode);
1084
1085	/* Do these before all the other work so that we don't bounce
1086	* the downconvert thread while waiting to destroy the locks. */
1087	ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
1088	ocfs2_mark_lockres_freeing(&oi->ip_inode_lockres);
1089	ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
1090
1091	ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap,
1092	&oi->ip_la_data_resv);
1093	ocfs2_resv_init_once(&oi->ip_la_data_resv);
1094
1095	/* We very well may get a clear_inode before all an inodes
1096	* metadata has hit disk. Of course, we can't drop any cluster
1097	* locks until the journal has finished with it. The only
1098	* exception here are successfully wiped inodes - their
1099	* metadata can now be considered to be part of the system
1100	* inodes from which it came. */
1101	if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1102	ocfs2_checkpoint_inode(inode);
1103
1104	mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1105	"Clear inode of %llu, inode has io markers\n",
1106	(unsigned long long)oi->ip_blkno);
1107
1108	ocfs2_extent_map_trunc(inode, 0);
1109
1110	status = ocfs2_drop_inode_locks(inode);
1111	if (status < 0)
1112	mlog_errno(status);
1113
1114	ocfs2_lock_res_free(&oi->ip_rw_lockres);
1115	ocfs2_lock_res_free(&oi->ip_inode_lockres);
1116	ocfs2_lock_res_free(&oi->ip_open_lockres);
1117
1118	ocfs2_metadata_cache_exit(INODE_CACHE(inode));
1119
1120	mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
1121	"Clear inode of %llu, inode has %u cache items\n",
1122	(unsigned long long)oi->ip_blkno,
1123	INODE_CACHE(inode)->ci_num_cached);
1124
1125	mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE),
1126	"Clear inode of %llu, inode has a bad flag\n",
1127	(unsigned long long)oi->ip_blkno);
1128
1129	mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1130	"Clear inode of %llu, inode is locked\n",
1131	(unsigned long long)oi->ip_blkno);
1132
1133	mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1134	"Clear inode of %llu, io_mutex is locked\n",
1135	(unsigned long long)oi->ip_blkno);
1136	mutex_unlock(&oi->ip_io_mutex);
1137
1138	/*
1139	* down_trylock() returns 0, down_write_trylock() returns 1
1140	* kernel 1, world 0
1141	*/
1142	mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1143	"Clear inode of %llu, alloc_sem is locked\n",
1144	(unsigned long long)oi->ip_blkno);
1145	up_write(&oi->ip_alloc_sem);
1146
1147	mlog_bug_on_msg(oi->ip_open_count,
1148	"Clear inode of %llu has open count %d\n",
1149	(unsigned long long)oi->ip_blkno, oi->ip_open_count);
1150
1151	/* Clear all other flags. */
1152	oi->ip_flags = 0;
1153	oi->ip_dir_start_lookup = 0;
1154	oi->ip_blkno = 0ULL;
1155
1156	/*
1157	* ip_jinode is used to track txns against this inode. We ensure that
1158	* the journal is flushed before journal shutdown. Thus it is safe to
1159	* have inodes get cleaned up after journal shutdown.
1160	*/
1161	jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
1162	&oi->ip_jinode);
1163	}
1164
1165	void ocfs2_evict_inode(struct inode *inode)
1166	{
1167	if (!inode->i_nlink \|\|
1168	(OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) {
1169	ocfs2_delete_inode(inode);
1170	} else {
1171	truncate_inode_pages(&inode->i_data, 0);
1172	}
1173	ocfs2_clear_inode(inode);
1174	}
1175
1176	/* Called under inode_lock, with no more references on the
1177	* struct inode, so it's safe here to check the flags field
1178	* and to manipulate i_nlink without any other locks. */
1179	int ocfs2_drop_inode(struct inode *inode)
1180	{
1181	struct ocfs2_inode_info *oi = OCFS2_I(inode);
1182	int res;
1183
1184	trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno,
1185	inode->i_nlink, oi->ip_flags);
1186
1187	if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1188	res = 1;
1189	else
1190	res = generic_drop_inode(inode);
1191
1192	return res;
1193	}
1194
1195	/*
1196	* This is called from our getattr.
1197	*/
1198	int ocfs2_inode_revalidate(struct dentry *dentry)
1199	{
1200	struct inode *inode = dentry->d_inode;
1201	int status = 0;
1202
1203	trace_ocfs2_inode_revalidate(inode,
1204	inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL,
1205	inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0);
1206
1207	if (!inode) {
1208	status = -ENOENT;
1209	goto bail;
1210	}
1211
1212	spin_lock(&OCFS2_I(inode)->ip_lock);
1213	if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1214	spin_unlock(&OCFS2_I(inode)->ip_lock);
1215	status = -ENOENT;
1216	goto bail;
1217	}
1218	spin_unlock(&OCFS2_I(inode)->ip_lock);
1219
1220	/* Let ocfs2_inode_lock do the work of updating our struct
1221	* inode for us. */
1222	status = ocfs2_inode_lock(inode, NULL, 0);
1223	if (status < 0) {
1224	if (status != -ENOENT)
1225	mlog_errno(status);
1226	goto bail;
1227	}
1228	ocfs2_inode_unlock(inode, 0);
1229	bail:
1230	return status;
1231	}
1232
1233	/*
1234	* Updates a disk inode from a
1235	* struct inode.
1236	* Only takes ip_lock.
1237	*/
1238	int ocfs2_mark_inode_dirty(handle_t *handle,
1239	struct inode *inode,
1240	struct buffer_head *bh)
1241	{
1242	int status;
1243	struct ocfs2_dinode fe = (struct ocfs2_dinode ) bh->b_data;
1244
1245	trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno);
1246
1247	status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1248	OCFS2_JOURNAL_ACCESS_WRITE);
1249	if (status < 0) {
1250	mlog_errno(status);
1251	goto leave;
1252	}
1253
1254	spin_lock(&OCFS2_I(inode)->ip_lock);
1255	fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1256	ocfs2_get_inode_flags(OCFS2_I(inode));
1257	fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1258	fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1259	spin_unlock(&OCFS2_I(inode)->ip_lock);
1260
1261	fe->i_size = cpu_to_le64(i_size_read(inode));
1262	ocfs2_set_links_count(fe, inode->i_nlink);
1263	fe->i_uid = cpu_to_le32(inode->i_uid);
1264	fe->i_gid = cpu_to_le32(inode->i_gid);
1265	fe->i_mode = cpu_to_le16(inode->i_mode);
1266	fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1267	fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1268	fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1269	fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1270	fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1271	fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1272
1273	ocfs2_journal_dirty(handle, bh);
1274	leave:
1275	return status;
1276	}
1277
1278	/*
1279	*
1280	* Updates a struct inode from a disk inode.
1281	* does no i/o, only takes ip_lock.
1282	*/
1283	void ocfs2_refresh_inode(struct inode *inode,
1284	struct ocfs2_dinode *fe)
1285	{
1286	spin_lock(&OCFS2_I(inode)->ip_lock);
1287
1288	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1289	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1290	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1291	ocfs2_set_inode_flags(inode);
1292	i_size_write(inode, le64_to_cpu(fe->i_size));
1293	inode->i_nlink = ocfs2_read_links_count(fe);
1294	inode->i_uid = le32_to_cpu(fe->i_uid);
1295	inode->i_gid = le32_to_cpu(fe->i_gid);
1296	inode->i_mode = le16_to_cpu(fe->i_mode);
1297	if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1298	inode->i_blocks = 0;
1299	else
1300	inode->i_blocks = ocfs2_inode_sector_count(inode);
1301	inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1302	inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1303	inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1304	inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1305	inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1306	inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1307
1308	spin_unlock(&OCFS2_I(inode)->ip_lock);
1309	}
1310
1311	int ocfs2_validate_inode_block(struct super_block *sb,
1312	struct buffer_head *bh)
1313	{
1314	int rc;
1315	struct ocfs2_dinode di = (struct ocfs2_dinode )bh->b_data;
1316
1317	trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr);
1318
1319	BUG_ON(!buffer_uptodate(bh));
1320
1321	/*
1322	* If the ecc fails, we return the error but otherwise
1323	* leave the filesystem running. We know any error is
1324	* local to this block.
1325	*/
1326	rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1327	if (rc) {
1328	mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
1329	(unsigned long long)bh->b_blocknr);
1330	goto bail;
1331	}
1332
1333	/*
1334	* Errors after here are fatal.
1335	*/
1336
1337	rc = -EINVAL;
1338
1339	if (!OCFS2_IS_VALID_DINODE(di)) {
1340	ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
1341	(unsigned long long)bh->b_blocknr, 7,
1342	di->i_signature);
1343	goto bail;
1344	}
1345
1346	if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1347	ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
1348	(unsigned long long)bh->b_blocknr,
1349	(unsigned long long)le64_to_cpu(di->i_blkno));
1350	goto bail;
1351	}
1352
1353	if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1354	ocfs2_error(sb,
1355	"Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
1356	(unsigned long long)bh->b_blocknr);
1357	goto bail;
1358	}
1359
1360	if (le32_to_cpu(di->i_fs_generation) !=
1361	OCFS2_SB(sb)->fs_generation) {
1362	ocfs2_error(sb,
1363	"Invalid dinode #%llu: fs_generation is %u\n",
1364	(unsigned long long)bh->b_blocknr,
1365	le32_to_cpu(di->i_fs_generation));
1366	goto bail;
1367	}
1368
1369	rc = 0;
1370
1371	bail:
1372	return rc;
1373	}
1374
1375	int ocfs2_read_inode_block_full(struct inode inode, struct buffer_head *bh,
1376	int flags)
1377	{
1378	int rc;
1379	struct buffer_head tmp = bh;
1380
1381	rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno,
1382	1, &tmp, flags, ocfs2_validate_inode_block);
1383
1384	/* If ocfs2_read_blocks() got us a new bh, pass it up. */
1385	if (!rc && !*bh)
1386	*bh = tmp;
1387
1388	return rc;
1389	}
1390
1391	int ocfs2_read_inode_block(struct inode inode, struct buffer_head *bh)
1392	{
1393	return ocfs2_read_inode_block_full(inode, bh, 0);
1394	}
1395
1396
1397	static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci)
1398	{
1399	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1400
1401	return oi->ip_blkno;
1402	}
1403
1404	static struct super_block ocfs2_inode_cache_get_super(struct ocfs2_caching_info ci)
1405	{
1406	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1407
1408	return oi->vfs_inode.i_sb;
1409	}
1410
1411	static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
1412	{
1413	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1414
1415	spin_lock(&oi->ip_lock);
1416	}
1417
1418	static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
1419	{
1420	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1421
1422	spin_unlock(&oi->ip_lock);
1423	}
1424
1425	static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci)
1426	{
1427	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1428
1429	mutex_lock(&oi->ip_io_mutex);
1430	}
1431
1432	static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci)
1433	{
1434	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1435
1436	mutex_unlock(&oi->ip_io_mutex);
1437	}
1438
1439	const struct ocfs2_caching_operations ocfs2_inode_caching_ops = {
1440	.co_owner = ocfs2_inode_cache_owner,
1441	.co_get_super = ocfs2_inode_cache_get_super,
1442	.co_cache_lock = ocfs2_inode_cache_lock,
1443	.co_cache_unlock = ocfs2_inode_cache_unlock,
1444	.co_io_lock = ocfs2_inode_cache_io_lock,
1445	.co_io_unlock = ocfs2_inode_cache_io_unlock,
1446	};
1447
1448

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