xref: /openbmc/linux/fs/ocfs2/inode.c (revision 22246614)
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/slab.h>
29 #include <linux/highmem.h>
30 #include <linux/pagemap.h>
31 
32 #include <asm/byteorder.h>
33 
34 #define MLOG_MASK_PREFIX ML_INODE
35 #include <cluster/masklog.h>
36 
37 #include "ocfs2.h"
38 
39 #include "alloc.h"
40 #include "dlmglue.h"
41 #include "extent_map.h"
42 #include "file.h"
43 #include "heartbeat.h"
44 #include "inode.h"
45 #include "journal.h"
46 #include "namei.h"
47 #include "suballoc.h"
48 #include "super.h"
49 #include "symlink.h"
50 #include "sysfile.h"
51 #include "uptodate.h"
52 
53 #include "buffer_head_io.h"
54 
55 struct ocfs2_find_inode_args
56 {
57 	u64		fi_blkno;
58 	unsigned long	fi_ino;
59 	unsigned int	fi_flags;
60 	unsigned int	fi_sysfile_type;
61 };
62 
63 static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
64 
65 static int ocfs2_read_locked_inode(struct inode *inode,
66 				   struct ocfs2_find_inode_args *args);
67 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
68 static int ocfs2_find_actor(struct inode *inode, void *opaque);
69 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
70 				    struct inode *inode,
71 				    struct buffer_head *fe_bh);
72 
73 void ocfs2_set_inode_flags(struct inode *inode)
74 {
75 	unsigned int flags = OCFS2_I(inode)->ip_attr;
76 
77 	inode->i_flags &= ~(S_IMMUTABLE |
78 		S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
79 
80 	if (flags & OCFS2_IMMUTABLE_FL)
81 		inode->i_flags |= S_IMMUTABLE;
82 
83 	if (flags & OCFS2_SYNC_FL)
84 		inode->i_flags |= S_SYNC;
85 	if (flags & OCFS2_APPEND_FL)
86 		inode->i_flags |= S_APPEND;
87 	if (flags & OCFS2_NOATIME_FL)
88 		inode->i_flags |= S_NOATIME;
89 	if (flags & OCFS2_DIRSYNC_FL)
90 		inode->i_flags |= S_DIRSYNC;
91 }
92 
93 /* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
94 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
95 {
96 	unsigned int flags = oi->vfs_inode.i_flags;
97 
98 	oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
99 			OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
100 	if (flags & S_SYNC)
101 		oi->ip_attr |= OCFS2_SYNC_FL;
102 	if (flags & S_APPEND)
103 		oi->ip_attr |= OCFS2_APPEND_FL;
104 	if (flags & S_IMMUTABLE)
105 		oi->ip_attr |= OCFS2_IMMUTABLE_FL;
106 	if (flags & S_NOATIME)
107 		oi->ip_attr |= OCFS2_NOATIME_FL;
108 	if (flags & S_DIRSYNC)
109 		oi->ip_attr |= OCFS2_DIRSYNC_FL;
110 }
111 
112 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
113 			 int sysfile_type)
114 {
115 	struct inode *inode = NULL;
116 	struct super_block *sb = osb->sb;
117 	struct ocfs2_find_inode_args args;
118 
119 	mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno);
120 
121 	/* Ok. By now we've either got the offsets passed to us by the
122 	 * caller, or we just pulled them off the bh. Lets do some
123 	 * sanity checks to make sure they're OK. */
124 	if (blkno == 0) {
125 		inode = ERR_PTR(-EINVAL);
126 		mlog_errno(PTR_ERR(inode));
127 		goto bail;
128 	}
129 
130 	args.fi_blkno = blkno;
131 	args.fi_flags = flags;
132 	args.fi_ino = ino_from_blkno(sb, blkno);
133 	args.fi_sysfile_type = sysfile_type;
134 
135 	inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
136 			     ocfs2_init_locked_inode, &args);
137 	/* inode was *not* in the inode cache. 2.6.x requires
138 	 * us to do our own read_inode call and unlock it
139 	 * afterwards. */
140 	if (inode && inode->i_state & I_NEW) {
141 		mlog(0, "Inode was not in inode cache, reading it.\n");
142 		ocfs2_read_locked_inode(inode, &args);
143 		unlock_new_inode(inode);
144 	}
145 	if (inode == NULL) {
146 		inode = ERR_PTR(-ENOMEM);
147 		mlog_errno(PTR_ERR(inode));
148 		goto bail;
149 	}
150 	if (is_bad_inode(inode)) {
151 		iput(inode);
152 		inode = ERR_PTR(-ESTALE);
153 		goto bail;
154 	}
155 
156 bail:
157 	if (!IS_ERR(inode)) {
158 		mlog(0, "returning inode with number %llu\n",
159 		     (unsigned long long)OCFS2_I(inode)->ip_blkno);
160 		mlog_exit_ptr(inode);
161 	}
162 
163 	return inode;
164 }
165 
166 
167 /*
168  * here's how inodes get read from disk:
169  * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
170  * found? : return the in-memory inode
171  * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
172  */
173 
174 static int ocfs2_find_actor(struct inode *inode, void *opaque)
175 {
176 	struct ocfs2_find_inode_args *args = NULL;
177 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
178 	int ret = 0;
179 
180 	mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque);
181 
182 	args = opaque;
183 
184 	mlog_bug_on_msg(!inode, "No inode in find actor!\n");
185 
186 	if (oi->ip_blkno != args->fi_blkno)
187 		goto bail;
188 
189 	ret = 1;
190 bail:
191 	mlog_exit(ret);
192 	return ret;
193 }
194 
195 /*
196  * initialize the new inode, but don't do anything that would cause
197  * us to sleep.
198  * return 0 on success, 1 on failure
199  */
200 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
201 {
202 	struct ocfs2_find_inode_args *args = opaque;
203 
204 	mlog_entry("inode = %p, opaque = %p\n", inode, opaque);
205 
206 	inode->i_ino = args->fi_ino;
207 	OCFS2_I(inode)->ip_blkno = args->fi_blkno;
208 	if (args->fi_sysfile_type != 0)
209 		lockdep_set_class(&inode->i_mutex,
210 			&ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
211 
212 	mlog_exit(0);
213 	return 0;
214 }
215 
216 int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
217 		     	 int create_ino)
218 {
219 	struct super_block *sb;
220 	struct ocfs2_super *osb;
221 	int status = -EINVAL;
222 
223 	mlog_entry("(0x%p, size:%llu)\n", inode,
224 		   (unsigned long long)le64_to_cpu(fe->i_size));
225 
226 	sb = inode->i_sb;
227 	osb = OCFS2_SB(sb);
228 
229 	/* this means that read_inode cannot create a superblock inode
230 	 * today.  change if needed. */
231 	if (!OCFS2_IS_VALID_DINODE(fe) ||
232 	    !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
233 		mlog(0, "Invalid dinode: i_ino=%lu, i_blkno=%llu, "
234 		     "signature = %.*s, flags = 0x%x\n",
235 		     inode->i_ino,
236 		     (unsigned long long)le64_to_cpu(fe->i_blkno), 7,
237 		     fe->i_signature, le32_to_cpu(fe->i_flags));
238 		goto bail;
239 	}
240 
241 	if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) {
242 		mlog(ML_ERROR, "file entry generation does not match "
243 		     "superblock! osb->fs_generation=%x, "
244 		     "fe->i_fs_generation=%x\n",
245 		     osb->fs_generation, le32_to_cpu(fe->i_fs_generation));
246 		goto bail;
247 	}
248 
249 	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
250 	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
251 	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
252 
253 	inode->i_version = 1;
254 	inode->i_generation = le32_to_cpu(fe->i_generation);
255 	inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
256 	inode->i_mode = le16_to_cpu(fe->i_mode);
257 	inode->i_uid = le32_to_cpu(fe->i_uid);
258 	inode->i_gid = le32_to_cpu(fe->i_gid);
259 
260 	/* Fast symlinks will have i_size but no allocated clusters. */
261 	if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
262 		inode->i_blocks = 0;
263 	else
264 		inode->i_blocks = ocfs2_inode_sector_count(inode);
265 	inode->i_mapping->a_ops = &ocfs2_aops;
266 	inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
267 	inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
268 	inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
269 	inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
270 	inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
271 	inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
272 
273 	if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
274 		mlog(ML_ERROR,
275 		     "ip_blkno %llu != i_blkno %llu!\n",
276 		     (unsigned long long)OCFS2_I(inode)->ip_blkno,
277 		     (unsigned long long)le64_to_cpu(fe->i_blkno));
278 
279 	inode->i_nlink = le16_to_cpu(fe->i_links_count);
280 
281 	if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
282 		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
283 
284 	if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
285 		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
286 		mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
287 	} else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
288 		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
289 	} else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
290 		mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
291 		/* we can't actually hit this as read_inode can't
292 		 * handle superblocks today ;-) */
293 		BUG();
294 	}
295 
296 	switch (inode->i_mode & S_IFMT) {
297 	    case S_IFREG:
298 		    inode->i_fop = &ocfs2_fops;
299 		    inode->i_op = &ocfs2_file_iops;
300 		    i_size_write(inode, le64_to_cpu(fe->i_size));
301 		    break;
302 	    case S_IFDIR:
303 		    inode->i_op = &ocfs2_dir_iops;
304 		    inode->i_fop = &ocfs2_dops;
305 		    i_size_write(inode, le64_to_cpu(fe->i_size));
306 		    break;
307 	    case S_IFLNK:
308 		    if (ocfs2_inode_is_fast_symlink(inode))
309 			inode->i_op = &ocfs2_fast_symlink_inode_operations;
310 		    else
311 			inode->i_op = &ocfs2_symlink_inode_operations;
312 		    i_size_write(inode, le64_to_cpu(fe->i_size));
313 		    break;
314 	    default:
315 		    inode->i_op = &ocfs2_special_file_iops;
316 		    init_special_inode(inode, inode->i_mode,
317 				       inode->i_rdev);
318 		    break;
319 	}
320 
321 	if (create_ino) {
322 		inode->i_ino = ino_from_blkno(inode->i_sb,
323 			       le64_to_cpu(fe->i_blkno));
324 
325 		/*
326 		 * If we ever want to create system files from kernel,
327 		 * the generation argument to
328 		 * ocfs2_inode_lock_res_init() will have to change.
329 		 */
330 		BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
331 
332 		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
333 					  OCFS2_LOCK_TYPE_META, 0, inode);
334 
335 		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
336 					  OCFS2_LOCK_TYPE_OPEN, 0, inode);
337 	}
338 
339 	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
340 				  OCFS2_LOCK_TYPE_RW, inode->i_generation,
341 				  inode);
342 
343 	ocfs2_set_inode_flags(inode);
344 
345 	status = 0;
346 bail:
347 	mlog_exit(status);
348 	return status;
349 }
350 
351 static int ocfs2_read_locked_inode(struct inode *inode,
352 				   struct ocfs2_find_inode_args *args)
353 {
354 	struct super_block *sb;
355 	struct ocfs2_super *osb;
356 	struct ocfs2_dinode *fe;
357 	struct buffer_head *bh = NULL;
358 	int status, can_lock;
359 	u32 generation = 0;
360 
361 	mlog_entry("(0x%p, 0x%p)\n", inode, args);
362 
363 	status = -EINVAL;
364 	if (inode == NULL || inode->i_sb == NULL) {
365 		mlog(ML_ERROR, "bad inode\n");
366 		return status;
367 	}
368 	sb = inode->i_sb;
369 	osb = OCFS2_SB(sb);
370 
371 	if (!args) {
372 		mlog(ML_ERROR, "bad inode args\n");
373 		make_bad_inode(inode);
374 		return status;
375 	}
376 
377 	/*
378 	 * To improve performance of cold-cache inode stats, we take
379 	 * the cluster lock here if possible.
380 	 *
381 	 * Generally, OCFS2 never trusts the contents of an inode
382 	 * unless it's holding a cluster lock, so taking it here isn't
383 	 * a correctness issue as much as it is a performance
384 	 * improvement.
385 	 *
386 	 * There are three times when taking the lock is not a good idea:
387 	 *
388 	 * 1) During startup, before we have initialized the DLM.
389 	 *
390 	 * 2) If we are reading certain system files which never get
391 	 *    cluster locks (local alloc, truncate log).
392 	 *
393 	 * 3) If the process doing the iget() is responsible for
394 	 *    orphan dir recovery. We're holding the orphan dir lock and
395 	 *    can get into a deadlock with another process on another
396 	 *    node in ->delete_inode().
397 	 *
398 	 * #1 and #2 can be simply solved by never taking the lock
399 	 * here for system files (which are the only type we read
400 	 * during mount). It's a heavier approach, but our main
401 	 * concern is user-accesible files anyway.
402 	 *
403 	 * #3 works itself out because we'll eventually take the
404 	 * cluster lock before trusting anything anyway.
405 	 */
406 	can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
407 		&& !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
408 		&& !ocfs2_mount_local(osb);
409 
410 	/*
411 	 * To maintain backwards compatibility with older versions of
412 	 * ocfs2-tools, we still store the generation value for system
413 	 * files. The only ones that actually matter to userspace are
414 	 * the journals, but it's easier and inexpensive to just flag
415 	 * all system files similarly.
416 	 */
417 	if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
418 		generation = osb->fs_generation;
419 
420 	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
421 				  OCFS2_LOCK_TYPE_META,
422 				  generation, inode);
423 
424 	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
425 				  OCFS2_LOCK_TYPE_OPEN,
426 				  0, inode);
427 
428 	if (can_lock) {
429 		status = ocfs2_open_lock(inode);
430 		if (status) {
431 			make_bad_inode(inode);
432 			mlog_errno(status);
433 			return status;
434 		}
435 		status = ocfs2_inode_lock(inode, NULL, 0);
436 		if (status) {
437 			make_bad_inode(inode);
438 			mlog_errno(status);
439 			return status;
440 		}
441 	}
442 
443 	if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
444 		status = ocfs2_try_open_lock(inode, 0);
445 		if (status) {
446 			make_bad_inode(inode);
447 			return status;
448 		}
449 	}
450 
451 	status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0,
452 				  can_lock ? inode : NULL);
453 	if (status < 0) {
454 		mlog_errno(status);
455 		goto bail;
456 	}
457 
458 	status = -EINVAL;
459 	fe = (struct ocfs2_dinode *) bh->b_data;
460 	if (!OCFS2_IS_VALID_DINODE(fe)) {
461 		mlog(0, "Invalid dinode #%llu: signature = %.*s\n",
462 		     (unsigned long long)args->fi_blkno, 7,
463 		     fe->i_signature);
464 		goto bail;
465 	}
466 
467 	/*
468 	 * This is a code bug. Right now the caller needs to
469 	 * understand whether it is asking for a system file inode or
470 	 * not so the proper lock names can be built.
471 	 */
472 	mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
473 			!!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
474 			"Inode %llu: system file state is ambigous\n",
475 			(unsigned long long)args->fi_blkno);
476 
477 	if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
478 	    S_ISBLK(le16_to_cpu(fe->i_mode)))
479     		inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
480 
481 	if (ocfs2_populate_inode(inode, fe, 0) < 0)
482 		goto bail;
483 
484 	BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
485 
486 	status = 0;
487 
488 bail:
489 	if (can_lock)
490 		ocfs2_inode_unlock(inode, 0);
491 
492 	if (status < 0)
493 		make_bad_inode(inode);
494 
495 	if (args && bh)
496 		brelse(bh);
497 
498 	mlog_exit(status);
499 	return status;
500 }
501 
502 void ocfs2_sync_blockdev(struct super_block *sb)
503 {
504 	sync_blockdev(sb->s_bdev);
505 }
506 
507 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
508 				     struct inode *inode,
509 				     struct buffer_head *fe_bh)
510 {
511 	int status = 0;
512 	struct ocfs2_truncate_context *tc = NULL;
513 	struct ocfs2_dinode *fe;
514 	handle_t *handle = NULL;
515 
516 	mlog_entry_void();
517 
518 	fe = (struct ocfs2_dinode *) fe_bh->b_data;
519 
520 	/*
521 	 * This check will also skip truncate of inodes with inline
522 	 * data and fast symlinks.
523 	 */
524 	if (fe->i_clusters) {
525 		handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
526 		if (IS_ERR(handle)) {
527 			status = PTR_ERR(handle);
528 			mlog_errno(status);
529 			goto out;
530 		}
531 
532 		status = ocfs2_journal_access(handle, inode, fe_bh,
533 					      OCFS2_JOURNAL_ACCESS_WRITE);
534 		if (status < 0) {
535 			mlog_errno(status);
536 			goto out;
537 		}
538 
539 		i_size_write(inode, 0);
540 
541 		status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
542 		if (status < 0) {
543 			mlog_errno(status);
544 			goto out;
545 		}
546 
547 		ocfs2_commit_trans(osb, handle);
548 		handle = NULL;
549 
550 		status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
551 		if (status < 0) {
552 			mlog_errno(status);
553 			goto out;
554 		}
555 
556 		status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
557 		if (status < 0) {
558 			mlog_errno(status);
559 			goto out;
560 		}
561 	}
562 
563 out:
564 	if (handle)
565 		ocfs2_commit_trans(osb, handle);
566 	mlog_exit(status);
567 	return status;
568 }
569 
570 static int ocfs2_remove_inode(struct inode *inode,
571 			      struct buffer_head *di_bh,
572 			      struct inode *orphan_dir_inode,
573 			      struct buffer_head *orphan_dir_bh)
574 {
575 	int status;
576 	struct inode *inode_alloc_inode = NULL;
577 	struct buffer_head *inode_alloc_bh = NULL;
578 	handle_t *handle;
579 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
580 	struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
581 
582 	inode_alloc_inode =
583 		ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
584 					    le16_to_cpu(di->i_suballoc_slot));
585 	if (!inode_alloc_inode) {
586 		status = -EEXIST;
587 		mlog_errno(status);
588 		goto bail;
589 	}
590 
591 	mutex_lock(&inode_alloc_inode->i_mutex);
592 	status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
593 	if (status < 0) {
594 		mutex_unlock(&inode_alloc_inode->i_mutex);
595 
596 		mlog_errno(status);
597 		goto bail;
598 	}
599 
600 	handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS);
601 	if (IS_ERR(handle)) {
602 		status = PTR_ERR(handle);
603 		mlog_errno(status);
604 		goto bail_unlock;
605 	}
606 
607 	status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
608 				  orphan_dir_bh);
609 	if (status < 0) {
610 		mlog_errno(status);
611 		goto bail_commit;
612 	}
613 
614 	/* set the inodes dtime */
615 	status = ocfs2_journal_access(handle, inode, di_bh,
616 				      OCFS2_JOURNAL_ACCESS_WRITE);
617 	if (status < 0) {
618 		mlog_errno(status);
619 		goto bail_commit;
620 	}
621 
622 	di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
623 	di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
624 
625 	status = ocfs2_journal_dirty(handle, di_bh);
626 	if (status < 0) {
627 		mlog_errno(status);
628 		goto bail_commit;
629 	}
630 
631 	ocfs2_remove_from_cache(inode, di_bh);
632 
633 	status = ocfs2_free_dinode(handle, inode_alloc_inode,
634 				   inode_alloc_bh, di);
635 	if (status < 0)
636 		mlog_errno(status);
637 
638 bail_commit:
639 	ocfs2_commit_trans(osb, handle);
640 bail_unlock:
641 	ocfs2_inode_unlock(inode_alloc_inode, 1);
642 	mutex_unlock(&inode_alloc_inode->i_mutex);
643 	brelse(inode_alloc_bh);
644 bail:
645 	iput(inode_alloc_inode);
646 
647 	return status;
648 }
649 
650 /*
651  * Serialize with orphan dir recovery. If the process doing
652  * recovery on this orphan dir does an iget() with the dir
653  * i_mutex held, we'll deadlock here. Instead we detect this
654  * and exit early - recovery will wipe this inode for us.
655  */
656 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
657 					     int slot)
658 {
659 	int ret = 0;
660 
661 	spin_lock(&osb->osb_lock);
662 	if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
663 		mlog(0, "Recovery is happening on orphan dir %d, will skip "
664 		     "this inode\n", slot);
665 		ret = -EDEADLK;
666 		goto out;
667 	}
668 	/* This signals to the orphan recovery process that it should
669 	 * wait for us to handle the wipe. */
670 	osb->osb_orphan_wipes[slot]++;
671 out:
672 	spin_unlock(&osb->osb_lock);
673 	return ret;
674 }
675 
676 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
677 					 int slot)
678 {
679 	spin_lock(&osb->osb_lock);
680 	osb->osb_orphan_wipes[slot]--;
681 	spin_unlock(&osb->osb_lock);
682 
683 	wake_up(&osb->osb_wipe_event);
684 }
685 
686 static int ocfs2_wipe_inode(struct inode *inode,
687 			    struct buffer_head *di_bh)
688 {
689 	int status, orphaned_slot;
690 	struct inode *orphan_dir_inode = NULL;
691 	struct buffer_head *orphan_dir_bh = NULL;
692 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
693 	struct ocfs2_dinode *di;
694 
695 	di = (struct ocfs2_dinode *) di_bh->b_data;
696 	orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
697 
698 	status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
699 	if (status)
700 		return status;
701 
702 	orphan_dir_inode = ocfs2_get_system_file_inode(osb,
703 						       ORPHAN_DIR_SYSTEM_INODE,
704 						       orphaned_slot);
705 	if (!orphan_dir_inode) {
706 		status = -EEXIST;
707 		mlog_errno(status);
708 		goto bail;
709 	}
710 
711 	/* Lock the orphan dir. The lock will be held for the entire
712 	 * delete_inode operation. We do this now to avoid races with
713 	 * recovery completion on other nodes. */
714 	mutex_lock(&orphan_dir_inode->i_mutex);
715 	status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
716 	if (status < 0) {
717 		mutex_unlock(&orphan_dir_inode->i_mutex);
718 
719 		mlog_errno(status);
720 		goto bail;
721 	}
722 
723 	/* we do this while holding the orphan dir lock because we
724 	 * don't want recovery being run from another node to try an
725 	 * inode delete underneath us -- this will result in two nodes
726 	 * truncating the same file! */
727 	status = ocfs2_truncate_for_delete(osb, inode, di_bh);
728 	if (status < 0) {
729 		mlog_errno(status);
730 		goto bail_unlock_dir;
731 	}
732 
733 	status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
734 				    orphan_dir_bh);
735 	if (status < 0)
736 		mlog_errno(status);
737 
738 bail_unlock_dir:
739 	ocfs2_inode_unlock(orphan_dir_inode, 1);
740 	mutex_unlock(&orphan_dir_inode->i_mutex);
741 	brelse(orphan_dir_bh);
742 bail:
743 	iput(orphan_dir_inode);
744 	ocfs2_signal_wipe_completion(osb, orphaned_slot);
745 
746 	return status;
747 }
748 
749 /* There is a series of simple checks that should be done before a
750  * trylock is even considered. Encapsulate those in this function. */
751 static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
752 {
753 	int ret = 0;
754 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
755 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
756 
757 	/* We shouldn't be getting here for the root directory
758 	 * inode.. */
759 	if (inode == osb->root_inode) {
760 		mlog(ML_ERROR, "Skipping delete of root inode.\n");
761 		goto bail;
762 	}
763 
764 	/* If we're coming from downconvert_thread we can't go into our own
765 	 * voting [hello, deadlock city!], so unforuntately we just
766 	 * have to skip deleting this guy. That's OK though because
767 	 * the node who's doing the actual deleting should handle it
768 	 * anyway. */
769 	if (current == osb->dc_task) {
770 		mlog(0, "Skipping delete of %lu because we're currently "
771 		     "in downconvert\n", inode->i_ino);
772 		goto bail;
773 	}
774 
775 	spin_lock(&oi->ip_lock);
776 	/* OCFS2 *never* deletes system files. This should technically
777 	 * never get here as system file inodes should always have a
778 	 * positive link count. */
779 	if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
780 		mlog(ML_ERROR, "Skipping delete of system file %llu\n",
781 		     (unsigned long long)oi->ip_blkno);
782 		goto bail_unlock;
783 	}
784 
785 	/* If we have allowd wipe of this inode for another node, it
786 	 * will be marked here so we can safely skip it. Recovery will
787 	 * cleanup any inodes we might inadvertantly skip here. */
788 	if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
789 		mlog(0, "Skipping delete of %lu because another node "
790 		     "has done this for us.\n", inode->i_ino);
791 		goto bail_unlock;
792 	}
793 
794 	ret = 1;
795 bail_unlock:
796 	spin_unlock(&oi->ip_lock);
797 bail:
798 	return ret;
799 }
800 
801 /* Query the cluster to determine whether we should wipe an inode from
802  * disk or not.
803  *
804  * Requires the inode to have the cluster lock. */
805 static int ocfs2_query_inode_wipe(struct inode *inode,
806 				  struct buffer_head *di_bh,
807 				  int *wipe)
808 {
809 	int status = 0;
810 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
811 	struct ocfs2_dinode *di;
812 
813 	*wipe = 0;
814 
815 	/* While we were waiting for the cluster lock in
816 	 * ocfs2_delete_inode, another node might have asked to delete
817 	 * the inode. Recheck our flags to catch this. */
818 	if (!ocfs2_inode_is_valid_to_delete(inode)) {
819 		mlog(0, "Skipping delete of %llu because flags changed\n",
820 		     (unsigned long long)oi->ip_blkno);
821 		goto bail;
822 	}
823 
824 	/* Now that we have an up to date inode, we can double check
825 	 * the link count. */
826 	if (inode->i_nlink) {
827 		mlog(0, "Skipping delete of %llu because nlink = %u\n",
828 		     (unsigned long long)oi->ip_blkno, inode->i_nlink);
829 		goto bail;
830 	}
831 
832 	/* Do some basic inode verification... */
833 	di = (struct ocfs2_dinode *) di_bh->b_data;
834 	if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
835 		/* for lack of a better error? */
836 		status = -EEXIST;
837 		mlog(ML_ERROR,
838 		     "Inode %llu (on-disk %llu) not orphaned! "
839 		     "Disk flags  0x%x, inode flags 0x%x\n",
840 		     (unsigned long long)oi->ip_blkno,
841 		     (unsigned long long)le64_to_cpu(di->i_blkno),
842 		     le32_to_cpu(di->i_flags), oi->ip_flags);
843 		goto bail;
844 	}
845 
846 	/* has someone already deleted us?! baaad... */
847 	if (di->i_dtime) {
848 		status = -EEXIST;
849 		mlog_errno(status);
850 		goto bail;
851 	}
852 
853 	/*
854 	 * This is how ocfs2 determines whether an inode is still live
855 	 * within the cluster. Every node takes a shared read lock on
856 	 * the inode open lock in ocfs2_read_locked_inode(). When we
857 	 * get to ->delete_inode(), each node tries to convert it's
858 	 * lock to an exclusive. Trylocks are serialized by the inode
859 	 * meta data lock. If the upconvert suceeds, we know the inode
860 	 * is no longer live and can be deleted.
861 	 *
862 	 * Though we call this with the meta data lock held, the
863 	 * trylock keeps us from ABBA deadlock.
864 	 */
865 	status = ocfs2_try_open_lock(inode, 1);
866 	if (status == -EAGAIN) {
867 		status = 0;
868 		mlog(0, "Skipping delete of %llu because it is in use on "
869 		     "other nodes\n", (unsigned long long)oi->ip_blkno);
870 		goto bail;
871 	}
872 	if (status < 0) {
873 		mlog_errno(status);
874 		goto bail;
875 	}
876 
877 	*wipe = 1;
878 	mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n",
879 	     (unsigned long long)oi->ip_blkno,
880 	     le16_to_cpu(di->i_orphaned_slot));
881 
882 bail:
883 	return status;
884 }
885 
886 /* Support function for ocfs2_delete_inode. Will help us keep the
887  * inode data in a consistent state for clear_inode. Always truncates
888  * pages, optionally sync's them first. */
889 static void ocfs2_cleanup_delete_inode(struct inode *inode,
890 				       int sync_data)
891 {
892 	mlog(0, "Cleanup inode %llu, sync = %d\n",
893 	     (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
894 	if (sync_data)
895 		write_inode_now(inode, 1);
896 	truncate_inode_pages(&inode->i_data, 0);
897 }
898 
899 void ocfs2_delete_inode(struct inode *inode)
900 {
901 	int wipe, status;
902 	sigset_t blocked, oldset;
903 	struct buffer_head *di_bh = NULL;
904 
905 	mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
906 
907 	if (is_bad_inode(inode)) {
908 		mlog(0, "Skipping delete of bad inode\n");
909 		goto bail;
910 	}
911 
912 	if (!ocfs2_inode_is_valid_to_delete(inode)) {
913 		/* It's probably not necessary to truncate_inode_pages
914 		 * here but we do it for safety anyway (it will most
915 		 * likely be a no-op anyway) */
916 		ocfs2_cleanup_delete_inode(inode, 0);
917 		goto bail;
918 	}
919 
920 	/* We want to block signals in delete_inode as the lock and
921 	 * messaging paths may return us -ERESTARTSYS. Which would
922 	 * cause us to exit early, resulting in inodes being orphaned
923 	 * forever. */
924 	sigfillset(&blocked);
925 	status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
926 	if (status < 0) {
927 		mlog_errno(status);
928 		ocfs2_cleanup_delete_inode(inode, 1);
929 		goto bail;
930 	}
931 
932 	/* Lock down the inode. This gives us an up to date view of
933 	 * it's metadata (for verification), and allows us to
934 	 * serialize delete_inode on multiple nodes.
935 	 *
936 	 * Even though we might be doing a truncate, we don't take the
937 	 * allocation lock here as it won't be needed - nobody will
938 	 * have the file open.
939 	 */
940 	status = ocfs2_inode_lock(inode, &di_bh, 1);
941 	if (status < 0) {
942 		if (status != -ENOENT)
943 			mlog_errno(status);
944 		ocfs2_cleanup_delete_inode(inode, 0);
945 		goto bail_unblock;
946 	}
947 
948 	/* Query the cluster. This will be the final decision made
949 	 * before we go ahead and wipe the inode. */
950 	status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
951 	if (!wipe || status < 0) {
952 		/* Error and remote inode busy both mean we won't be
953 		 * removing the inode, so they take almost the same
954 		 * path. */
955 		if (status < 0)
956 			mlog_errno(status);
957 
958 		/* Someone in the cluster has disallowed a wipe of
959 		 * this inode, or it was never completely
960 		 * orphaned. Write out the pages and exit now. */
961 		ocfs2_cleanup_delete_inode(inode, 1);
962 		goto bail_unlock_inode;
963 	}
964 
965 	ocfs2_cleanup_delete_inode(inode, 0);
966 
967 	status = ocfs2_wipe_inode(inode, di_bh);
968 	if (status < 0) {
969 		if (status != -EDEADLK)
970 			mlog_errno(status);
971 		goto bail_unlock_inode;
972 	}
973 
974 	/*
975 	 * Mark the inode as successfully deleted.
976 	 *
977 	 * This is important for ocfs2_clear_inode() as it will check
978 	 * this flag and skip any checkpointing work
979 	 *
980 	 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
981 	 * the LVB for other nodes.
982 	 */
983 	OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
984 
985 bail_unlock_inode:
986 	ocfs2_inode_unlock(inode, 1);
987 	brelse(di_bh);
988 bail_unblock:
989 	status = sigprocmask(SIG_SETMASK, &oldset, NULL);
990 	if (status < 0)
991 		mlog_errno(status);
992 bail:
993 	clear_inode(inode);
994 	mlog_exit_void();
995 }
996 
997 void ocfs2_clear_inode(struct inode *inode)
998 {
999 	int status;
1000 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
1001 
1002 	mlog_entry_void();
1003 
1004 	if (!inode)
1005 		goto bail;
1006 
1007 	mlog(0, "Clearing inode: %llu, nlink = %u\n",
1008 	     (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink);
1009 
1010 	mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1011 			"Inode=%lu\n", inode->i_ino);
1012 
1013 	/* To preven remote deletes we hold open lock before, now it
1014 	 * is time to unlock PR and EX open locks. */
1015 	ocfs2_open_unlock(inode);
1016 
1017 	/* Do these before all the other work so that we don't bounce
1018 	 * the downconvert thread while waiting to destroy the locks. */
1019 	ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
1020 	ocfs2_mark_lockres_freeing(&oi->ip_inode_lockres);
1021 	ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
1022 
1023 	/* We very well may get a clear_inode before all an inodes
1024 	 * metadata has hit disk. Of course, we can't drop any cluster
1025 	 * locks until the journal has finished with it. The only
1026 	 * exception here are successfully wiped inodes - their
1027 	 * metadata can now be considered to be part of the system
1028 	 * inodes from which it came. */
1029 	if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1030 		ocfs2_checkpoint_inode(inode);
1031 
1032 	mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1033 			"Clear inode of %llu, inode has io markers\n",
1034 			(unsigned long long)oi->ip_blkno);
1035 
1036 	ocfs2_extent_map_trunc(inode, 0);
1037 
1038 	status = ocfs2_drop_inode_locks(inode);
1039 	if (status < 0)
1040 		mlog_errno(status);
1041 
1042 	ocfs2_lock_res_free(&oi->ip_rw_lockres);
1043 	ocfs2_lock_res_free(&oi->ip_inode_lockres);
1044 	ocfs2_lock_res_free(&oi->ip_open_lockres);
1045 
1046 	ocfs2_metadata_cache_purge(inode);
1047 
1048 	mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached,
1049 			"Clear inode of %llu, inode has %u cache items\n",
1050 			(unsigned long long)oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached);
1051 
1052 	mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
1053 			"Clear inode of %llu, inode has a bad flag\n",
1054 			(unsigned long long)oi->ip_blkno);
1055 
1056 	mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1057 			"Clear inode of %llu, inode is locked\n",
1058 			(unsigned long long)oi->ip_blkno);
1059 
1060 	mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1061 			"Clear inode of %llu, io_mutex is locked\n",
1062 			(unsigned long long)oi->ip_blkno);
1063 	mutex_unlock(&oi->ip_io_mutex);
1064 
1065 	/*
1066 	 * down_trylock() returns 0, down_write_trylock() returns 1
1067 	 * kernel 1, world 0
1068 	 */
1069 	mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1070 			"Clear inode of %llu, alloc_sem is locked\n",
1071 			(unsigned long long)oi->ip_blkno);
1072 	up_write(&oi->ip_alloc_sem);
1073 
1074 	mlog_bug_on_msg(oi->ip_open_count,
1075 			"Clear inode of %llu has open count %d\n",
1076 			(unsigned long long)oi->ip_blkno, oi->ip_open_count);
1077 
1078 	/* Clear all other flags. */
1079 	oi->ip_flags = OCFS2_INODE_CACHE_INLINE;
1080 	oi->ip_created_trans = 0;
1081 	oi->ip_last_trans = 0;
1082 	oi->ip_dir_start_lookup = 0;
1083 	oi->ip_blkno = 0ULL;
1084 
1085 bail:
1086 	mlog_exit_void();
1087 }
1088 
1089 /* Called under inode_lock, with no more references on the
1090  * struct inode, so it's safe here to check the flags field
1091  * and to manipulate i_nlink without any other locks. */
1092 void ocfs2_drop_inode(struct inode *inode)
1093 {
1094 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
1095 
1096 	mlog_entry_void();
1097 
1098 	mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n",
1099 	     (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags);
1100 
1101 	if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1102 		generic_delete_inode(inode);
1103 	else
1104 		generic_drop_inode(inode);
1105 
1106 	mlog_exit_void();
1107 }
1108 
1109 /*
1110  * TODO: this should probably be merged into ocfs2_get_block
1111  *
1112  * However, you now need to pay attention to the cont_prepare_write()
1113  * stuff in ocfs2_get_block (that is, ocfs2_get_block pretty much
1114  * expects never to extend).
1115  */
1116 struct buffer_head *ocfs2_bread(struct inode *inode,
1117 				int block, int *err, int reada)
1118 {
1119 	struct buffer_head *bh = NULL;
1120 	int tmperr;
1121 	u64 p_blkno;
1122 	int readflags = OCFS2_BH_CACHED;
1123 
1124 	if (reada)
1125 		readflags |= OCFS2_BH_READAHEAD;
1126 
1127 	if (((u64)block << inode->i_sb->s_blocksize_bits) >=
1128 	    i_size_read(inode)) {
1129 		BUG_ON(!reada);
1130 		return NULL;
1131 	}
1132 
1133 	down_read(&OCFS2_I(inode)->ip_alloc_sem);
1134 	tmperr = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL,
1135 					     NULL);
1136 	up_read(&OCFS2_I(inode)->ip_alloc_sem);
1137 	if (tmperr < 0) {
1138 		mlog_errno(tmperr);
1139 		goto fail;
1140 	}
1141 
1142 	tmperr = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, &bh,
1143 				  readflags, inode);
1144 	if (tmperr < 0)
1145 		goto fail;
1146 
1147 	tmperr = 0;
1148 
1149 	*err = 0;
1150 	return bh;
1151 
1152 fail:
1153 	if (bh) {
1154 		brelse(bh);
1155 		bh = NULL;
1156 	}
1157 	*err = -EIO;
1158 	return NULL;
1159 }
1160 
1161 /*
1162  * This is called from our getattr.
1163  */
1164 int ocfs2_inode_revalidate(struct dentry *dentry)
1165 {
1166 	struct inode *inode = dentry->d_inode;
1167 	int status = 0;
1168 
1169 	mlog_entry("(inode = 0x%p, ino = %llu)\n", inode,
1170 		   inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL);
1171 
1172 	if (!inode) {
1173 		mlog(0, "eep, no inode!\n");
1174 		status = -ENOENT;
1175 		goto bail;
1176 	}
1177 
1178 	spin_lock(&OCFS2_I(inode)->ip_lock);
1179 	if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1180 		spin_unlock(&OCFS2_I(inode)->ip_lock);
1181 		mlog(0, "inode deleted!\n");
1182 		status = -ENOENT;
1183 		goto bail;
1184 	}
1185 	spin_unlock(&OCFS2_I(inode)->ip_lock);
1186 
1187 	/* Let ocfs2_inode_lock do the work of updating our struct
1188 	 * inode for us. */
1189 	status = ocfs2_inode_lock(inode, NULL, 0);
1190 	if (status < 0) {
1191 		if (status != -ENOENT)
1192 			mlog_errno(status);
1193 		goto bail;
1194 	}
1195 	ocfs2_inode_unlock(inode, 0);
1196 bail:
1197 	mlog_exit(status);
1198 
1199 	return status;
1200 }
1201 
1202 /*
1203  * Updates a disk inode from a
1204  * struct inode.
1205  * Only takes ip_lock.
1206  */
1207 int ocfs2_mark_inode_dirty(handle_t *handle,
1208 			   struct inode *inode,
1209 			   struct buffer_head *bh)
1210 {
1211 	int status;
1212 	struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1213 
1214 	mlog_entry("(inode %llu)\n",
1215 		   (unsigned long long)OCFS2_I(inode)->ip_blkno);
1216 
1217 	status = ocfs2_journal_access(handle, inode, bh,
1218 				      OCFS2_JOURNAL_ACCESS_WRITE);
1219 	if (status < 0) {
1220 		mlog_errno(status);
1221 		goto leave;
1222 	}
1223 
1224 	spin_lock(&OCFS2_I(inode)->ip_lock);
1225 	fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1226 	ocfs2_get_inode_flags(OCFS2_I(inode));
1227 	fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1228 	fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1229 	spin_unlock(&OCFS2_I(inode)->ip_lock);
1230 
1231 	fe->i_size = cpu_to_le64(i_size_read(inode));
1232 	fe->i_links_count = cpu_to_le16(inode->i_nlink);
1233 	fe->i_uid = cpu_to_le32(inode->i_uid);
1234 	fe->i_gid = cpu_to_le32(inode->i_gid);
1235 	fe->i_mode = cpu_to_le16(inode->i_mode);
1236 	fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1237 	fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1238 	fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1239 	fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1240 	fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1241 	fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1242 
1243 	status = ocfs2_journal_dirty(handle, bh);
1244 	if (status < 0)
1245 		mlog_errno(status);
1246 
1247 	status = 0;
1248 leave:
1249 
1250 	mlog_exit(status);
1251 	return status;
1252 }
1253 
1254 /*
1255  *
1256  * Updates a struct inode from a disk inode.
1257  * does no i/o, only takes ip_lock.
1258  */
1259 void ocfs2_refresh_inode(struct inode *inode,
1260 			 struct ocfs2_dinode *fe)
1261 {
1262 	spin_lock(&OCFS2_I(inode)->ip_lock);
1263 
1264 	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1265 	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1266 	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1267 	ocfs2_set_inode_flags(inode);
1268 	i_size_write(inode, le64_to_cpu(fe->i_size));
1269 	inode->i_nlink = le16_to_cpu(fe->i_links_count);
1270 	inode->i_uid = le32_to_cpu(fe->i_uid);
1271 	inode->i_gid = le32_to_cpu(fe->i_gid);
1272 	inode->i_mode = le16_to_cpu(fe->i_mode);
1273 	if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1274 		inode->i_blocks = 0;
1275 	else
1276 		inode->i_blocks = ocfs2_inode_sector_count(inode);
1277 	inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1278 	inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1279 	inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1280 	inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1281 	inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1282 	inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1283 
1284 	spin_unlock(&OCFS2_I(inode)->ip_lock);
1285 }
1286