xref: /openbmc/linux/fs/ocfs2/inode.c (revision 10fc3a18)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * inode.c
4  *
5  * vfs' aops, fops, dops and iops
6  *
7  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
8  */
9 
10 #include <linux/fs.h>
11 #include <linux/types.h>
12 #include <linux/highmem.h>
13 #include <linux/pagemap.h>
14 #include <linux/quotaops.h>
15 #include <linux/iversion.h>
16 
17 #include <asm/byteorder.h>
18 
19 #include <cluster/masklog.h>
20 
21 #include "ocfs2.h"
22 
23 #include "alloc.h"
24 #include "dir.h"
25 #include "blockcheck.h"
26 #include "dlmglue.h"
27 #include "extent_map.h"
28 #include "file.h"
29 #include "heartbeat.h"
30 #include "inode.h"
31 #include "journal.h"
32 #include "namei.h"
33 #include "suballoc.h"
34 #include "super.h"
35 #include "symlink.h"
36 #include "sysfile.h"
37 #include "uptodate.h"
38 #include "xattr.h"
39 #include "refcounttree.h"
40 #include "ocfs2_trace.h"
41 #include "filecheck.h"
42 
43 #include "buffer_head_io.h"
44 
45 struct ocfs2_find_inode_args
46 {
47 	u64		fi_blkno;
48 	unsigned long	fi_ino;
49 	unsigned int	fi_flags;
50 	unsigned int	fi_sysfile_type;
51 };
52 
53 static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
54 
55 static int ocfs2_read_locked_inode(struct inode *inode,
56 				   struct ocfs2_find_inode_args *args);
57 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
58 static int ocfs2_find_actor(struct inode *inode, void *opaque);
59 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
60 				    struct inode *inode,
61 				    struct buffer_head *fe_bh);
62 
63 static int ocfs2_filecheck_read_inode_block_full(struct inode *inode,
64 						 struct buffer_head **bh,
65 						 int flags, int type);
66 static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
67 						struct buffer_head *bh);
68 static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
69 					      struct buffer_head *bh);
70 
ocfs2_set_inode_flags(struct inode * inode)71 void ocfs2_set_inode_flags(struct inode *inode)
72 {
73 	unsigned int flags = OCFS2_I(inode)->ip_attr;
74 
75 	inode->i_flags &= ~(S_IMMUTABLE |
76 		S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
77 
78 	if (flags & OCFS2_IMMUTABLE_FL)
79 		inode->i_flags |= S_IMMUTABLE;
80 
81 	if (flags & OCFS2_SYNC_FL)
82 		inode->i_flags |= S_SYNC;
83 	if (flags & OCFS2_APPEND_FL)
84 		inode->i_flags |= S_APPEND;
85 	if (flags & OCFS2_NOATIME_FL)
86 		inode->i_flags |= S_NOATIME;
87 	if (flags & OCFS2_DIRSYNC_FL)
88 		inode->i_flags |= S_DIRSYNC;
89 }
90 
91 /* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
ocfs2_get_inode_flags(struct ocfs2_inode_info * oi)92 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
93 {
94 	unsigned int flags = oi->vfs_inode.i_flags;
95 
96 	oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
97 			OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
98 	if (flags & S_SYNC)
99 		oi->ip_attr |= OCFS2_SYNC_FL;
100 	if (flags & S_APPEND)
101 		oi->ip_attr |= OCFS2_APPEND_FL;
102 	if (flags & S_IMMUTABLE)
103 		oi->ip_attr |= OCFS2_IMMUTABLE_FL;
104 	if (flags & S_NOATIME)
105 		oi->ip_attr |= OCFS2_NOATIME_FL;
106 	if (flags & S_DIRSYNC)
107 		oi->ip_attr |= OCFS2_DIRSYNC_FL;
108 }
109 
ocfs2_ilookup(struct super_block * sb,u64 blkno)110 struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno)
111 {
112 	struct ocfs2_find_inode_args args;
113 
114 	args.fi_blkno = blkno;
115 	args.fi_flags = 0;
116 	args.fi_ino = ino_from_blkno(sb, blkno);
117 	args.fi_sysfile_type = 0;
118 
119 	return ilookup5(sb, blkno, ocfs2_find_actor, &args);
120 }
ocfs2_iget(struct ocfs2_super * osb,u64 blkno,unsigned flags,int sysfile_type)121 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
122 			 int sysfile_type)
123 {
124 	int rc = -ESTALE;
125 	struct inode *inode = NULL;
126 	struct super_block *sb = osb->sb;
127 	struct ocfs2_find_inode_args args;
128 	journal_t *journal = osb->journal->j_journal;
129 
130 	trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
131 			       sysfile_type);
132 
133 	/* Ok. By now we've either got the offsets passed to us by the
134 	 * caller, or we just pulled them off the bh. Lets do some
135 	 * sanity checks to make sure they're OK. */
136 	if (blkno == 0) {
137 		inode = ERR_PTR(-EINVAL);
138 		mlog_errno(PTR_ERR(inode));
139 		goto bail;
140 	}
141 
142 	args.fi_blkno = blkno;
143 	args.fi_flags = flags;
144 	args.fi_ino = ino_from_blkno(sb, blkno);
145 	args.fi_sysfile_type = sysfile_type;
146 
147 	inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
148 			     ocfs2_init_locked_inode, &args);
149 	/* inode was *not* in the inode cache. 2.6.x requires
150 	 * us to do our own read_inode call and unlock it
151 	 * afterwards. */
152 	if (inode == NULL) {
153 		inode = ERR_PTR(-ENOMEM);
154 		mlog_errno(PTR_ERR(inode));
155 		goto bail;
156 	}
157 	trace_ocfs2_iget5_locked(inode->i_state);
158 	if (inode->i_state & I_NEW) {
159 		rc = ocfs2_read_locked_inode(inode, &args);
160 		unlock_new_inode(inode);
161 	}
162 	if (is_bad_inode(inode)) {
163 		iput(inode);
164 		inode = ERR_PTR(rc);
165 		goto bail;
166 	}
167 
168 	/*
169 	 * Set transaction id's of transactions that have to be committed
170 	 * to finish f[data]sync. We set them to currently running transaction
171 	 * as we cannot be sure that the inode or some of its metadata isn't
172 	 * part of the transaction - the inode could have been reclaimed and
173 	 * now it is reread from disk.
174 	 */
175 	if (journal) {
176 		transaction_t *transaction;
177 		tid_t tid;
178 		struct ocfs2_inode_info *oi = OCFS2_I(inode);
179 
180 		read_lock(&journal->j_state_lock);
181 		if (journal->j_running_transaction)
182 			transaction = journal->j_running_transaction;
183 		else
184 			transaction = journal->j_committing_transaction;
185 		if (transaction)
186 			tid = transaction->t_tid;
187 		else
188 			tid = journal->j_commit_sequence;
189 		read_unlock(&journal->j_state_lock);
190 		oi->i_sync_tid = tid;
191 		oi->i_datasync_tid = tid;
192 	}
193 
194 bail:
195 	if (!IS_ERR(inode)) {
196 		trace_ocfs2_iget_end(inode,
197 			(unsigned long long)OCFS2_I(inode)->ip_blkno);
198 	}
199 
200 	return inode;
201 }
202 
203 
204 /*
205  * here's how inodes get read from disk:
206  * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
207  * found? : return the in-memory inode
208  * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
209  */
210 
ocfs2_find_actor(struct inode * inode,void * opaque)211 static int ocfs2_find_actor(struct inode *inode, void *opaque)
212 {
213 	struct ocfs2_find_inode_args *args = NULL;
214 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
215 	int ret = 0;
216 
217 	args = opaque;
218 
219 	mlog_bug_on_msg(!inode, "No inode in find actor!\n");
220 
221 	trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno);
222 
223 	if (oi->ip_blkno != args->fi_blkno)
224 		goto bail;
225 
226 	ret = 1;
227 bail:
228 	return ret;
229 }
230 
231 /*
232  * initialize the new inode, but don't do anything that would cause
233  * us to sleep.
234  * return 0 on success, 1 on failure
235  */
ocfs2_init_locked_inode(struct inode * inode,void * opaque)236 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
237 {
238 	struct ocfs2_find_inode_args *args = opaque;
239 	static struct lock_class_key ocfs2_quota_ip_alloc_sem_key,
240 				     ocfs2_file_ip_alloc_sem_key;
241 
242 	inode->i_ino = args->fi_ino;
243 	OCFS2_I(inode)->ip_blkno = args->fi_blkno;
244 	if (args->fi_sysfile_type != 0)
245 		lockdep_set_class(&inode->i_rwsem,
246 			&ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
247 	if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE ||
248 	    args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE ||
249 	    args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE ||
250 	    args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE)
251 		lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
252 				  &ocfs2_quota_ip_alloc_sem_key);
253 	else
254 		lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
255 				  &ocfs2_file_ip_alloc_sem_key);
256 
257 	return 0;
258 }
259 
ocfs2_populate_inode(struct inode * inode,struct ocfs2_dinode * fe,int create_ino)260 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
261 			  int create_ino)
262 {
263 	struct super_block *sb;
264 	struct ocfs2_super *osb;
265 	int use_plocks = 1;
266 
267 	sb = inode->i_sb;
268 	osb = OCFS2_SB(sb);
269 
270 	if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
271 	    ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
272 		use_plocks = 0;
273 
274 	/*
275 	 * These have all been checked by ocfs2_read_inode_block() or set
276 	 * by ocfs2_mknod_locked(), so a failure is a code bug.
277 	 */
278 	BUG_ON(!OCFS2_IS_VALID_DINODE(fe));  /* This means that read_inode
279 						cannot create a superblock
280 						inode today.  change if
281 						that is needed. */
282 	BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
283 	BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
284 
285 
286 	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
287 	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
288 	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
289 
290 	inode_set_iversion(inode, 1);
291 	inode->i_generation = le32_to_cpu(fe->i_generation);
292 	inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
293 	inode->i_mode = le16_to_cpu(fe->i_mode);
294 	i_uid_write(inode, le32_to_cpu(fe->i_uid));
295 	i_gid_write(inode, le32_to_cpu(fe->i_gid));
296 
297 	/* Fast symlinks will have i_size but no allocated clusters. */
298 	if (S_ISLNK(inode->i_mode) && !fe->i_clusters) {
299 		inode->i_blocks = 0;
300 		inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
301 	} else {
302 		inode->i_blocks = ocfs2_inode_sector_count(inode);
303 		inode->i_mapping->a_ops = &ocfs2_aops;
304 	}
305 	inode_set_atime(inode, le64_to_cpu(fe->i_atime),
306 		        le32_to_cpu(fe->i_atime_nsec));
307 	inode_set_mtime(inode, le64_to_cpu(fe->i_mtime),
308 		        le32_to_cpu(fe->i_mtime_nsec));
309 	inode_set_ctime(inode, le64_to_cpu(fe->i_ctime),
310 		        le32_to_cpu(fe->i_ctime_nsec));
311 
312 	if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
313 		mlog(ML_ERROR,
314 		     "ip_blkno %llu != i_blkno %llu!\n",
315 		     (unsigned long long)OCFS2_I(inode)->ip_blkno,
316 		     (unsigned long long)le64_to_cpu(fe->i_blkno));
317 
318 	set_nlink(inode, ocfs2_read_links_count(fe));
319 
320 	trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
321 				   le32_to_cpu(fe->i_flags));
322 	if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
323 		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
324 		inode->i_flags |= S_NOQUOTA;
325 	}
326 
327 	if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
328 		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
329 	} else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
330 		OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
331 	} else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
332 		inode->i_flags |= S_NOQUOTA;
333 	} else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
334 		/* we can't actually hit this as read_inode can't
335 		 * handle superblocks today ;-) */
336 		BUG();
337 	}
338 
339 	switch (inode->i_mode & S_IFMT) {
340 	    case S_IFREG:
341 		    if (use_plocks)
342 			    inode->i_fop = &ocfs2_fops;
343 		    else
344 			    inode->i_fop = &ocfs2_fops_no_plocks;
345 		    inode->i_op = &ocfs2_file_iops;
346 		    i_size_write(inode, le64_to_cpu(fe->i_size));
347 		    break;
348 	    case S_IFDIR:
349 		    inode->i_op = &ocfs2_dir_iops;
350 		    if (use_plocks)
351 			    inode->i_fop = &ocfs2_dops;
352 		    else
353 			    inode->i_fop = &ocfs2_dops_no_plocks;
354 		    i_size_write(inode, le64_to_cpu(fe->i_size));
355 		    OCFS2_I(inode)->ip_dir_lock_gen = 1;
356 		    break;
357 	    case S_IFLNK:
358 		    inode->i_op = &ocfs2_symlink_inode_operations;
359 		    inode_nohighmem(inode);
360 		    i_size_write(inode, le64_to_cpu(fe->i_size));
361 		    break;
362 	    default:
363 		    inode->i_op = &ocfs2_special_file_iops;
364 		    init_special_inode(inode, inode->i_mode,
365 				       inode->i_rdev);
366 		    break;
367 	}
368 
369 	if (create_ino) {
370 		inode->i_ino = ino_from_blkno(inode->i_sb,
371 			       le64_to_cpu(fe->i_blkno));
372 
373 		/*
374 		 * If we ever want to create system files from kernel,
375 		 * the generation argument to
376 		 * ocfs2_inode_lock_res_init() will have to change.
377 		 */
378 		BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
379 
380 		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
381 					  OCFS2_LOCK_TYPE_META, 0, inode);
382 
383 		ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
384 					  OCFS2_LOCK_TYPE_OPEN, 0, inode);
385 	}
386 
387 	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
388 				  OCFS2_LOCK_TYPE_RW, inode->i_generation,
389 				  inode);
390 
391 	ocfs2_set_inode_flags(inode);
392 
393 	OCFS2_I(inode)->ip_last_used_slot = 0;
394 	OCFS2_I(inode)->ip_last_used_group = 0;
395 
396 	if (S_ISDIR(inode->i_mode))
397 		ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
398 				    OCFS2_RESV_FLAG_DIR);
399 }
400 
ocfs2_read_locked_inode(struct inode * inode,struct ocfs2_find_inode_args * args)401 static int ocfs2_read_locked_inode(struct inode *inode,
402 				   struct ocfs2_find_inode_args *args)
403 {
404 	struct super_block *sb;
405 	struct ocfs2_super *osb;
406 	struct ocfs2_dinode *fe;
407 	struct buffer_head *bh = NULL;
408 	int status, can_lock, lock_level = 0;
409 	u32 generation = 0;
410 
411 	status = -EINVAL;
412 	sb = inode->i_sb;
413 	osb = OCFS2_SB(sb);
414 
415 	/*
416 	 * To improve performance of cold-cache inode stats, we take
417 	 * the cluster lock here if possible.
418 	 *
419 	 * Generally, OCFS2 never trusts the contents of an inode
420 	 * unless it's holding a cluster lock, so taking it here isn't
421 	 * a correctness issue as much as it is a performance
422 	 * improvement.
423 	 *
424 	 * There are three times when taking the lock is not a good idea:
425 	 *
426 	 * 1) During startup, before we have initialized the DLM.
427 	 *
428 	 * 2) If we are reading certain system files which never get
429 	 *    cluster locks (local alloc, truncate log).
430 	 *
431 	 * 3) If the process doing the iget() is responsible for
432 	 *    orphan dir recovery. We're holding the orphan dir lock and
433 	 *    can get into a deadlock with another process on another
434 	 *    node in ->delete_inode().
435 	 *
436 	 * #1 and #2 can be simply solved by never taking the lock
437 	 * here for system files (which are the only type we read
438 	 * during mount). It's a heavier approach, but our main
439 	 * concern is user-accessible files anyway.
440 	 *
441 	 * #3 works itself out because we'll eventually take the
442 	 * cluster lock before trusting anything anyway.
443 	 */
444 	can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
445 		&& !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
446 		&& !ocfs2_mount_local(osb);
447 
448 	trace_ocfs2_read_locked_inode(
449 		(unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock);
450 
451 	/*
452 	 * To maintain backwards compatibility with older versions of
453 	 * ocfs2-tools, we still store the generation value for system
454 	 * files. The only ones that actually matter to userspace are
455 	 * the journals, but it's easier and inexpensive to just flag
456 	 * all system files similarly.
457 	 */
458 	if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
459 		generation = osb->fs_generation;
460 
461 	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
462 				  OCFS2_LOCK_TYPE_META,
463 				  generation, inode);
464 
465 	ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
466 				  OCFS2_LOCK_TYPE_OPEN,
467 				  0, inode);
468 
469 	if (can_lock) {
470 		status = ocfs2_open_lock(inode);
471 		if (status) {
472 			make_bad_inode(inode);
473 			mlog_errno(status);
474 			return status;
475 		}
476 		status = ocfs2_inode_lock(inode, NULL, lock_level);
477 		if (status) {
478 			make_bad_inode(inode);
479 			mlog_errno(status);
480 			return status;
481 		}
482 	}
483 
484 	if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
485 		status = ocfs2_try_open_lock(inode, 0);
486 		if (status) {
487 			make_bad_inode(inode);
488 			return status;
489 		}
490 	}
491 
492 	if (can_lock) {
493 		if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
494 			status = ocfs2_filecheck_read_inode_block_full(inode,
495 						&bh, OCFS2_BH_IGNORE_CACHE, 0);
496 		else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
497 			status = ocfs2_filecheck_read_inode_block_full(inode,
498 						&bh, OCFS2_BH_IGNORE_CACHE, 1);
499 		else
500 			status = ocfs2_read_inode_block_full(inode,
501 						&bh, OCFS2_BH_IGNORE_CACHE);
502 	} else {
503 		status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
504 		/*
505 		 * If buffer is in jbd, then its checksum may not have been
506 		 * computed as yet.
507 		 */
508 		if (!status && !buffer_jbd(bh)) {
509 			if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
510 				status = ocfs2_filecheck_validate_inode_block(
511 								osb->sb, bh);
512 			else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
513 				status = ocfs2_filecheck_repair_inode_block(
514 								osb->sb, bh);
515 			else
516 				status = ocfs2_validate_inode_block(
517 								osb->sb, bh);
518 		}
519 	}
520 	if (status < 0) {
521 		mlog_errno(status);
522 		goto bail;
523 	}
524 
525 	status = -EINVAL;
526 	fe = (struct ocfs2_dinode *) bh->b_data;
527 
528 	/*
529 	 * This is a code bug. Right now the caller needs to
530 	 * understand whether it is asking for a system file inode or
531 	 * not so the proper lock names can be built.
532 	 */
533 	mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
534 			!!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
535 			"Inode %llu: system file state is ambiguous\n",
536 			(unsigned long long)args->fi_blkno);
537 
538 	if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
539 	    S_ISBLK(le16_to_cpu(fe->i_mode)))
540 		inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
541 
542 	ocfs2_populate_inode(inode, fe, 0);
543 
544 	BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
545 
546 	if (buffer_dirty(bh) && !buffer_jbd(bh)) {
547 		if (can_lock) {
548 			ocfs2_inode_unlock(inode, lock_level);
549 			lock_level = 1;
550 			ocfs2_inode_lock(inode, NULL, lock_level);
551 		}
552 		status = ocfs2_write_block(osb, bh, INODE_CACHE(inode));
553 		if (status < 0) {
554 			mlog_errno(status);
555 			goto bail;
556 		}
557 	}
558 
559 	status = 0;
560 
561 bail:
562 	if (can_lock)
563 		ocfs2_inode_unlock(inode, lock_level);
564 
565 	if (status < 0)
566 		make_bad_inode(inode);
567 
568 	brelse(bh);
569 
570 	return status;
571 }
572 
ocfs2_sync_blockdev(struct super_block * sb)573 void ocfs2_sync_blockdev(struct super_block *sb)
574 {
575 	sync_blockdev(sb->s_bdev);
576 }
577 
ocfs2_truncate_for_delete(struct ocfs2_super * osb,struct inode * inode,struct buffer_head * fe_bh)578 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
579 				     struct inode *inode,
580 				     struct buffer_head *fe_bh)
581 {
582 	int status = 0;
583 	struct ocfs2_dinode *fe;
584 	handle_t *handle = NULL;
585 
586 	fe = (struct ocfs2_dinode *) fe_bh->b_data;
587 
588 	/*
589 	 * This check will also skip truncate of inodes with inline
590 	 * data and fast symlinks.
591 	 */
592 	if (fe->i_clusters) {
593 		if (ocfs2_should_order_data(inode))
594 			ocfs2_begin_ordered_truncate(inode, 0);
595 
596 		handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
597 		if (IS_ERR(handle)) {
598 			status = PTR_ERR(handle);
599 			handle = NULL;
600 			mlog_errno(status);
601 			goto out;
602 		}
603 
604 		status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
605 						 fe_bh,
606 						 OCFS2_JOURNAL_ACCESS_WRITE);
607 		if (status < 0) {
608 			mlog_errno(status);
609 			goto out;
610 		}
611 
612 		i_size_write(inode, 0);
613 
614 		status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
615 		if (status < 0) {
616 			mlog_errno(status);
617 			goto out;
618 		}
619 
620 		ocfs2_commit_trans(osb, handle);
621 		handle = NULL;
622 
623 		status = ocfs2_commit_truncate(osb, inode, fe_bh);
624 		if (status < 0)
625 			mlog_errno(status);
626 	}
627 
628 out:
629 	if (handle)
630 		ocfs2_commit_trans(osb, handle);
631 	return status;
632 }
633 
ocfs2_remove_inode(struct inode * inode,struct buffer_head * di_bh,struct inode * orphan_dir_inode,struct buffer_head * orphan_dir_bh)634 static int ocfs2_remove_inode(struct inode *inode,
635 			      struct buffer_head *di_bh,
636 			      struct inode *orphan_dir_inode,
637 			      struct buffer_head *orphan_dir_bh)
638 {
639 	int status;
640 	struct inode *inode_alloc_inode = NULL;
641 	struct buffer_head *inode_alloc_bh = NULL;
642 	handle_t *handle;
643 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
644 	struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
645 
646 	inode_alloc_inode =
647 		ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
648 					    le16_to_cpu(di->i_suballoc_slot));
649 	if (!inode_alloc_inode) {
650 		status = -ENOENT;
651 		mlog_errno(status);
652 		goto bail;
653 	}
654 
655 	inode_lock(inode_alloc_inode);
656 	status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
657 	if (status < 0) {
658 		inode_unlock(inode_alloc_inode);
659 
660 		mlog_errno(status);
661 		goto bail;
662 	}
663 
664 	handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
665 				   ocfs2_quota_trans_credits(inode->i_sb));
666 	if (IS_ERR(handle)) {
667 		status = PTR_ERR(handle);
668 		mlog_errno(status);
669 		goto bail_unlock;
670 	}
671 
672 	if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
673 		status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
674 					  orphan_dir_bh, false);
675 		if (status < 0) {
676 			mlog_errno(status);
677 			goto bail_commit;
678 		}
679 	}
680 
681 	/* set the inodes dtime */
682 	status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
683 					 OCFS2_JOURNAL_ACCESS_WRITE);
684 	if (status < 0) {
685 		mlog_errno(status);
686 		goto bail_commit;
687 	}
688 
689 	di->i_dtime = cpu_to_le64(ktime_get_real_seconds());
690 	di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
691 	ocfs2_journal_dirty(handle, di_bh);
692 
693 	ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
694 	dquot_free_inode(inode);
695 
696 	status = ocfs2_free_dinode(handle, inode_alloc_inode,
697 				   inode_alloc_bh, di);
698 	if (status < 0)
699 		mlog_errno(status);
700 
701 bail_commit:
702 	ocfs2_commit_trans(osb, handle);
703 bail_unlock:
704 	ocfs2_inode_unlock(inode_alloc_inode, 1);
705 	inode_unlock(inode_alloc_inode);
706 	brelse(inode_alloc_bh);
707 bail:
708 	iput(inode_alloc_inode);
709 
710 	return status;
711 }
712 
713 /*
714  * Serialize with orphan dir recovery. If the process doing
715  * recovery on this orphan dir does an iget() with the dir
716  * i_rwsem held, we'll deadlock here. Instead we detect this
717  * and exit early - recovery will wipe this inode for us.
718  */
ocfs2_check_orphan_recovery_state(struct ocfs2_super * osb,int slot)719 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
720 					     int slot)
721 {
722 	int ret = 0;
723 
724 	spin_lock(&osb->osb_lock);
725 	if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
726 		ret = -EDEADLK;
727 		goto out;
728 	}
729 	/* This signals to the orphan recovery process that it should
730 	 * wait for us to handle the wipe. */
731 	osb->osb_orphan_wipes[slot]++;
732 out:
733 	spin_unlock(&osb->osb_lock);
734 	trace_ocfs2_check_orphan_recovery_state(slot, ret);
735 	return ret;
736 }
737 
ocfs2_signal_wipe_completion(struct ocfs2_super * osb,int slot)738 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
739 					 int slot)
740 {
741 	spin_lock(&osb->osb_lock);
742 	osb->osb_orphan_wipes[slot]--;
743 	spin_unlock(&osb->osb_lock);
744 
745 	wake_up(&osb->osb_wipe_event);
746 }
747 
ocfs2_wipe_inode(struct inode * inode,struct buffer_head * di_bh)748 static int ocfs2_wipe_inode(struct inode *inode,
749 			    struct buffer_head *di_bh)
750 {
751 	int status, orphaned_slot = -1;
752 	struct inode *orphan_dir_inode = NULL;
753 	struct buffer_head *orphan_dir_bh = NULL;
754 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
755 	struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
756 
757 	if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
758 		orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
759 
760 		status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
761 		if (status)
762 			return status;
763 
764 		orphan_dir_inode = ocfs2_get_system_file_inode(osb,
765 							       ORPHAN_DIR_SYSTEM_INODE,
766 							       orphaned_slot);
767 		if (!orphan_dir_inode) {
768 			status = -ENOENT;
769 			mlog_errno(status);
770 			goto bail;
771 		}
772 
773 		/* Lock the orphan dir. The lock will be held for the entire
774 		 * delete_inode operation. We do this now to avoid races with
775 		 * recovery completion on other nodes. */
776 		inode_lock(orphan_dir_inode);
777 		status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
778 		if (status < 0) {
779 			inode_unlock(orphan_dir_inode);
780 
781 			mlog_errno(status);
782 			goto bail;
783 		}
784 	}
785 
786 	/* we do this while holding the orphan dir lock because we
787 	 * don't want recovery being run from another node to try an
788 	 * inode delete underneath us -- this will result in two nodes
789 	 * truncating the same file! */
790 	status = ocfs2_truncate_for_delete(osb, inode, di_bh);
791 	if (status < 0) {
792 		mlog_errno(status);
793 		goto bail_unlock_dir;
794 	}
795 
796 	/* Remove any dir index tree */
797 	if (S_ISDIR(inode->i_mode)) {
798 		status = ocfs2_dx_dir_truncate(inode, di_bh);
799 		if (status) {
800 			mlog_errno(status);
801 			goto bail_unlock_dir;
802 		}
803 	}
804 
805 	/*Free extended attribute resources associated with this inode.*/
806 	status = ocfs2_xattr_remove(inode, di_bh);
807 	if (status < 0) {
808 		mlog_errno(status);
809 		goto bail_unlock_dir;
810 	}
811 
812 	status = ocfs2_remove_refcount_tree(inode, di_bh);
813 	if (status < 0) {
814 		mlog_errno(status);
815 		goto bail_unlock_dir;
816 	}
817 
818 	status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
819 				    orphan_dir_bh);
820 	if (status < 0)
821 		mlog_errno(status);
822 
823 bail_unlock_dir:
824 	if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)
825 		return status;
826 
827 	ocfs2_inode_unlock(orphan_dir_inode, 1);
828 	inode_unlock(orphan_dir_inode);
829 	brelse(orphan_dir_bh);
830 bail:
831 	iput(orphan_dir_inode);
832 	ocfs2_signal_wipe_completion(osb, orphaned_slot);
833 
834 	return status;
835 }
836 
837 /* There is a series of simple checks that should be done before a
838  * trylock is even considered. Encapsulate those in this function. */
ocfs2_inode_is_valid_to_delete(struct inode * inode)839 static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
840 {
841 	int ret = 0;
842 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
843 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
844 
845 	trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task,
846 					     (unsigned long long)oi->ip_blkno,
847 					     oi->ip_flags);
848 
849 	/* We shouldn't be getting here for the root directory
850 	 * inode.. */
851 	if (inode == osb->root_inode) {
852 		mlog(ML_ERROR, "Skipping delete of root inode.\n");
853 		goto bail;
854 	}
855 
856 	/*
857 	 * If we're coming from downconvert_thread we can't go into our own
858 	 * voting [hello, deadlock city!] so we cannot delete the inode. But
859 	 * since we dropped last inode ref when downconverting dentry lock,
860 	 * we cannot have the file open and thus the node doing unlink will
861 	 * take care of deleting the inode.
862 	 */
863 	if (current == osb->dc_task)
864 		goto bail;
865 
866 	spin_lock(&oi->ip_lock);
867 	/* OCFS2 *never* deletes system files. This should technically
868 	 * never get here as system file inodes should always have a
869 	 * positive link count. */
870 	if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
871 		mlog(ML_ERROR, "Skipping delete of system file %llu\n",
872 		     (unsigned long long)oi->ip_blkno);
873 		goto bail_unlock;
874 	}
875 
876 	ret = 1;
877 bail_unlock:
878 	spin_unlock(&oi->ip_lock);
879 bail:
880 	return ret;
881 }
882 
883 /* Query the cluster to determine whether we should wipe an inode from
884  * disk or not.
885  *
886  * Requires the inode to have the cluster lock. */
ocfs2_query_inode_wipe(struct inode * inode,struct buffer_head * di_bh,int * wipe)887 static int ocfs2_query_inode_wipe(struct inode *inode,
888 				  struct buffer_head *di_bh,
889 				  int *wipe)
890 {
891 	int status = 0, reason = 0;
892 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
893 	struct ocfs2_dinode *di;
894 
895 	*wipe = 0;
896 
897 	trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno,
898 					   inode->i_nlink);
899 
900 	/* While we were waiting for the cluster lock in
901 	 * ocfs2_delete_inode, another node might have asked to delete
902 	 * the inode. Recheck our flags to catch this. */
903 	if (!ocfs2_inode_is_valid_to_delete(inode)) {
904 		reason = 1;
905 		goto bail;
906 	}
907 
908 	/* Now that we have an up to date inode, we can double check
909 	 * the link count. */
910 	if (inode->i_nlink)
911 		goto bail;
912 
913 	/* Do some basic inode verification... */
914 	di = (struct ocfs2_dinode *) di_bh->b_data;
915 	if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) &&
916 	    !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
917 		/*
918 		 * Inodes in the orphan dir must have ORPHANED_FL.  The only
919 		 * inodes that come back out of the orphan dir are reflink
920 		 * targets. A reflink target may be moved out of the orphan
921 		 * dir between the time we scan the directory and the time we
922 		 * process it. This would lead to HAS_REFCOUNT_FL being set but
923 		 * ORPHANED_FL not.
924 		 */
925 		if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) {
926 			reason = 2;
927 			goto bail;
928 		}
929 
930 		/* for lack of a better error? */
931 		status = -EEXIST;
932 		mlog(ML_ERROR,
933 		     "Inode %llu (on-disk %llu) not orphaned! "
934 		     "Disk flags  0x%x, inode flags 0x%x\n",
935 		     (unsigned long long)oi->ip_blkno,
936 		     (unsigned long long)le64_to_cpu(di->i_blkno),
937 		     le32_to_cpu(di->i_flags), oi->ip_flags);
938 		goto bail;
939 	}
940 
941 	/* has someone already deleted us?! baaad... */
942 	if (di->i_dtime) {
943 		status = -EEXIST;
944 		mlog_errno(status);
945 		goto bail;
946 	}
947 
948 	/*
949 	 * This is how ocfs2 determines whether an inode is still live
950 	 * within the cluster. Every node takes a shared read lock on
951 	 * the inode open lock in ocfs2_read_locked_inode(). When we
952 	 * get to ->delete_inode(), each node tries to convert it's
953 	 * lock to an exclusive. Trylocks are serialized by the inode
954 	 * meta data lock. If the upconvert succeeds, we know the inode
955 	 * is no longer live and can be deleted.
956 	 *
957 	 * Though we call this with the meta data lock held, the
958 	 * trylock keeps us from ABBA deadlock.
959 	 */
960 	status = ocfs2_try_open_lock(inode, 1);
961 	if (status == -EAGAIN) {
962 		status = 0;
963 		reason = 3;
964 		goto bail;
965 	}
966 	if (status < 0) {
967 		mlog_errno(status);
968 		goto bail;
969 	}
970 
971 	*wipe = 1;
972 	trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot));
973 
974 bail:
975 	trace_ocfs2_query_inode_wipe_end(status, reason);
976 	return status;
977 }
978 
979 /* Support function for ocfs2_delete_inode. Will help us keep the
980  * inode data in a consistent state for clear_inode. Always truncates
981  * pages, optionally sync's them first. */
ocfs2_cleanup_delete_inode(struct inode * inode,int sync_data)982 static void ocfs2_cleanup_delete_inode(struct inode *inode,
983 				       int sync_data)
984 {
985 	trace_ocfs2_cleanup_delete_inode(
986 		(unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
987 	if (sync_data)
988 		filemap_write_and_wait(inode->i_mapping);
989 	truncate_inode_pages_final(&inode->i_data);
990 }
991 
ocfs2_delete_inode(struct inode * inode)992 static void ocfs2_delete_inode(struct inode *inode)
993 {
994 	int wipe, status;
995 	sigset_t oldset;
996 	struct buffer_head *di_bh = NULL;
997 	struct ocfs2_dinode *di = NULL;
998 
999 	trace_ocfs2_delete_inode(inode->i_ino,
1000 				 (unsigned long long)OCFS2_I(inode)->ip_blkno,
1001 				 is_bad_inode(inode));
1002 
1003 	/* When we fail in read_inode() we mark inode as bad. The second test
1004 	 * catches the case when inode allocation fails before allocating
1005 	 * a block for inode. */
1006 	if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno)
1007 		goto bail;
1008 
1009 	if (!ocfs2_inode_is_valid_to_delete(inode)) {
1010 		/* It's probably not necessary to truncate_inode_pages
1011 		 * here but we do it for safety anyway (it will most
1012 		 * likely be a no-op anyway) */
1013 		ocfs2_cleanup_delete_inode(inode, 0);
1014 		goto bail;
1015 	}
1016 
1017 	dquot_initialize(inode);
1018 
1019 	/* We want to block signals in delete_inode as the lock and
1020 	 * messaging paths may return us -ERESTARTSYS. Which would
1021 	 * cause us to exit early, resulting in inodes being orphaned
1022 	 * forever. */
1023 	ocfs2_block_signals(&oldset);
1024 
1025 	/*
1026 	 * Synchronize us against ocfs2_get_dentry. We take this in
1027 	 * shared mode so that all nodes can still concurrently
1028 	 * process deletes.
1029 	 */
1030 	status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0);
1031 	if (status < 0) {
1032 		mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status);
1033 		ocfs2_cleanup_delete_inode(inode, 0);
1034 		goto bail_unblock;
1035 	}
1036 	/* Lock down the inode. This gives us an up to date view of
1037 	 * it's metadata (for verification), and allows us to
1038 	 * serialize delete_inode on multiple nodes.
1039 	 *
1040 	 * Even though we might be doing a truncate, we don't take the
1041 	 * allocation lock here as it won't be needed - nobody will
1042 	 * have the file open.
1043 	 */
1044 	status = ocfs2_inode_lock(inode, &di_bh, 1);
1045 	if (status < 0) {
1046 		if (status != -ENOENT)
1047 			mlog_errno(status);
1048 		ocfs2_cleanup_delete_inode(inode, 0);
1049 		goto bail_unlock_nfs_sync;
1050 	}
1051 
1052 	di = (struct ocfs2_dinode *)di_bh->b_data;
1053 	/* Skip inode deletion and wait for dio orphan entry recovered
1054 	 * first */
1055 	if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
1056 		ocfs2_cleanup_delete_inode(inode, 0);
1057 		goto bail_unlock_inode;
1058 	}
1059 
1060 	/* Query the cluster. This will be the final decision made
1061 	 * before we go ahead and wipe the inode. */
1062 	status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
1063 	if (!wipe || status < 0) {
1064 		/* Error and remote inode busy both mean we won't be
1065 		 * removing the inode, so they take almost the same
1066 		 * path. */
1067 		if (status < 0)
1068 			mlog_errno(status);
1069 
1070 		/* Someone in the cluster has disallowed a wipe of
1071 		 * this inode, or it was never completely
1072 		 * orphaned. Write out the pages and exit now. */
1073 		ocfs2_cleanup_delete_inode(inode, 1);
1074 		goto bail_unlock_inode;
1075 	}
1076 
1077 	ocfs2_cleanup_delete_inode(inode, 0);
1078 
1079 	status = ocfs2_wipe_inode(inode, di_bh);
1080 	if (status < 0) {
1081 		if (status != -EDEADLK)
1082 			mlog_errno(status);
1083 		goto bail_unlock_inode;
1084 	}
1085 
1086 	/*
1087 	 * Mark the inode as successfully deleted.
1088 	 *
1089 	 * This is important for ocfs2_clear_inode() as it will check
1090 	 * this flag and skip any checkpointing work
1091 	 *
1092 	 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1093 	 * the LVB for other nodes.
1094 	 */
1095 	OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
1096 
1097 bail_unlock_inode:
1098 	ocfs2_inode_unlock(inode, 1);
1099 	brelse(di_bh);
1100 
1101 bail_unlock_nfs_sync:
1102 	ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0);
1103 
1104 bail_unblock:
1105 	ocfs2_unblock_signals(&oldset);
1106 bail:
1107 	return;
1108 }
1109 
ocfs2_clear_inode(struct inode * inode)1110 static void ocfs2_clear_inode(struct inode *inode)
1111 {
1112 	int status;
1113 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
1114 	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1115 
1116 	clear_inode(inode);
1117 	trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno,
1118 				inode->i_nlink);
1119 
1120 	mlog_bug_on_msg(osb == NULL,
1121 			"Inode=%lu\n", inode->i_ino);
1122 
1123 	dquot_drop(inode);
1124 
1125 	/* To preven remote deletes we hold open lock before, now it
1126 	 * is time to unlock PR and EX open locks. */
1127 	ocfs2_open_unlock(inode);
1128 
1129 	/* Do these before all the other work so that we don't bounce
1130 	 * the downconvert thread while waiting to destroy the locks. */
1131 	ocfs2_mark_lockres_freeing(osb, &oi->ip_rw_lockres);
1132 	ocfs2_mark_lockres_freeing(osb, &oi->ip_inode_lockres);
1133 	ocfs2_mark_lockres_freeing(osb, &oi->ip_open_lockres);
1134 
1135 	ocfs2_resv_discard(&osb->osb_la_resmap,
1136 			   &oi->ip_la_data_resv);
1137 	ocfs2_resv_init_once(&oi->ip_la_data_resv);
1138 
1139 	/* We very well may get a clear_inode before all an inodes
1140 	 * metadata has hit disk. Of course, we can't drop any cluster
1141 	 * locks until the journal has finished with it. The only
1142 	 * exception here are successfully wiped inodes - their
1143 	 * metadata can now be considered to be part of the system
1144 	 * inodes from which it came. */
1145 	if (!(oi->ip_flags & OCFS2_INODE_DELETED))
1146 		ocfs2_checkpoint_inode(inode);
1147 
1148 	mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1149 			"Clear inode of %llu, inode has io markers\n",
1150 			(unsigned long long)oi->ip_blkno);
1151 	mlog_bug_on_msg(!list_empty(&oi->ip_unwritten_list),
1152 			"Clear inode of %llu, inode has unwritten extents\n",
1153 			(unsigned long long)oi->ip_blkno);
1154 
1155 	ocfs2_extent_map_trunc(inode, 0);
1156 
1157 	status = ocfs2_drop_inode_locks(inode);
1158 	if (status < 0)
1159 		mlog_errno(status);
1160 
1161 	ocfs2_lock_res_free(&oi->ip_rw_lockres);
1162 	ocfs2_lock_res_free(&oi->ip_inode_lockres);
1163 	ocfs2_lock_res_free(&oi->ip_open_lockres);
1164 
1165 	ocfs2_metadata_cache_exit(INODE_CACHE(inode));
1166 
1167 	mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
1168 			"Clear inode of %llu, inode has %u cache items\n",
1169 			(unsigned long long)oi->ip_blkno,
1170 			INODE_CACHE(inode)->ci_num_cached);
1171 
1172 	mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE),
1173 			"Clear inode of %llu, inode has a bad flag\n",
1174 			(unsigned long long)oi->ip_blkno);
1175 
1176 	mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1177 			"Clear inode of %llu, inode is locked\n",
1178 			(unsigned long long)oi->ip_blkno);
1179 
1180 	mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1181 			"Clear inode of %llu, io_mutex is locked\n",
1182 			(unsigned long long)oi->ip_blkno);
1183 	mutex_unlock(&oi->ip_io_mutex);
1184 
1185 	/*
1186 	 * down_trylock() returns 0, down_write_trylock() returns 1
1187 	 * kernel 1, world 0
1188 	 */
1189 	mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1190 			"Clear inode of %llu, alloc_sem is locked\n",
1191 			(unsigned long long)oi->ip_blkno);
1192 	up_write(&oi->ip_alloc_sem);
1193 
1194 	mlog_bug_on_msg(oi->ip_open_count,
1195 			"Clear inode of %llu has open count %d\n",
1196 			(unsigned long long)oi->ip_blkno, oi->ip_open_count);
1197 
1198 	/* Clear all other flags. */
1199 	oi->ip_flags = 0;
1200 	oi->ip_dir_start_lookup = 0;
1201 	oi->ip_blkno = 0ULL;
1202 
1203 	/*
1204 	 * ip_jinode is used to track txns against this inode. We ensure that
1205 	 * the journal is flushed before journal shutdown. Thus it is safe to
1206 	 * have inodes get cleaned up after journal shutdown.
1207 	 */
1208 	jbd2_journal_release_jbd_inode(osb->journal->j_journal,
1209 				       &oi->ip_jinode);
1210 }
1211 
ocfs2_evict_inode(struct inode * inode)1212 void ocfs2_evict_inode(struct inode *inode)
1213 {
1214 	if (!inode->i_nlink ||
1215 	    (OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) {
1216 		ocfs2_delete_inode(inode);
1217 	} else {
1218 		truncate_inode_pages_final(&inode->i_data);
1219 	}
1220 	ocfs2_clear_inode(inode);
1221 }
1222 
1223 /* Called under inode_lock, with no more references on the
1224  * struct inode, so it's safe here to check the flags field
1225  * and to manipulate i_nlink without any other locks. */
ocfs2_drop_inode(struct inode * inode)1226 int ocfs2_drop_inode(struct inode *inode)
1227 {
1228 	struct ocfs2_inode_info *oi = OCFS2_I(inode);
1229 
1230 	trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno,
1231 				inode->i_nlink, oi->ip_flags);
1232 
1233 	assert_spin_locked(&inode->i_lock);
1234 	inode->i_state |= I_WILL_FREE;
1235 	spin_unlock(&inode->i_lock);
1236 	write_inode_now(inode, 1);
1237 	spin_lock(&inode->i_lock);
1238 	WARN_ON(inode->i_state & I_NEW);
1239 	inode->i_state &= ~I_WILL_FREE;
1240 
1241 	return 1;
1242 }
1243 
1244 /*
1245  * This is called from our getattr.
1246  */
ocfs2_inode_revalidate(struct dentry * dentry)1247 int ocfs2_inode_revalidate(struct dentry *dentry)
1248 {
1249 	struct inode *inode = d_inode(dentry);
1250 	int status = 0;
1251 
1252 	trace_ocfs2_inode_revalidate(inode,
1253 		inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL,
1254 		inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0);
1255 
1256 	if (!inode) {
1257 		status = -ENOENT;
1258 		goto bail;
1259 	}
1260 
1261 	spin_lock(&OCFS2_I(inode)->ip_lock);
1262 	if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1263 		spin_unlock(&OCFS2_I(inode)->ip_lock);
1264 		status = -ENOENT;
1265 		goto bail;
1266 	}
1267 	spin_unlock(&OCFS2_I(inode)->ip_lock);
1268 
1269 	/* Let ocfs2_inode_lock do the work of updating our struct
1270 	 * inode for us. */
1271 	status = ocfs2_inode_lock(inode, NULL, 0);
1272 	if (status < 0) {
1273 		if (status != -ENOENT)
1274 			mlog_errno(status);
1275 		goto bail;
1276 	}
1277 	ocfs2_inode_unlock(inode, 0);
1278 bail:
1279 	return status;
1280 }
1281 
1282 /*
1283  * Updates a disk inode from a
1284  * struct inode.
1285  * Only takes ip_lock.
1286  */
ocfs2_mark_inode_dirty(handle_t * handle,struct inode * inode,struct buffer_head * bh)1287 int ocfs2_mark_inode_dirty(handle_t *handle,
1288 			   struct inode *inode,
1289 			   struct buffer_head *bh)
1290 {
1291 	int status;
1292 	struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1293 
1294 	trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno);
1295 
1296 	status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1297 					 OCFS2_JOURNAL_ACCESS_WRITE);
1298 	if (status < 0) {
1299 		mlog_errno(status);
1300 		goto leave;
1301 	}
1302 
1303 	spin_lock(&OCFS2_I(inode)->ip_lock);
1304 	fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1305 	ocfs2_get_inode_flags(OCFS2_I(inode));
1306 	fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1307 	fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1308 	spin_unlock(&OCFS2_I(inode)->ip_lock);
1309 
1310 	fe->i_size = cpu_to_le64(i_size_read(inode));
1311 	ocfs2_set_links_count(fe, inode->i_nlink);
1312 	fe->i_uid = cpu_to_le32(i_uid_read(inode));
1313 	fe->i_gid = cpu_to_le32(i_gid_read(inode));
1314 	fe->i_mode = cpu_to_le16(inode->i_mode);
1315 	fe->i_atime = cpu_to_le64(inode_get_atime_sec(inode));
1316 	fe->i_atime_nsec = cpu_to_le32(inode_get_atime_nsec(inode));
1317 	fe->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode));
1318 	fe->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode));
1319 	fe->i_mtime = cpu_to_le64(inode_get_mtime_sec(inode));
1320 	fe->i_mtime_nsec = cpu_to_le32(inode_get_mtime_nsec(inode));
1321 
1322 	ocfs2_journal_dirty(handle, bh);
1323 	ocfs2_update_inode_fsync_trans(handle, inode, 1);
1324 leave:
1325 	return status;
1326 }
1327 
1328 /*
1329  *
1330  * Updates a struct inode from a disk inode.
1331  * does no i/o, only takes ip_lock.
1332  */
ocfs2_refresh_inode(struct inode * inode,struct ocfs2_dinode * fe)1333 void ocfs2_refresh_inode(struct inode *inode,
1334 			 struct ocfs2_dinode *fe)
1335 {
1336 	spin_lock(&OCFS2_I(inode)->ip_lock);
1337 
1338 	OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1339 	OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1340 	OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1341 	ocfs2_set_inode_flags(inode);
1342 	i_size_write(inode, le64_to_cpu(fe->i_size));
1343 	set_nlink(inode, ocfs2_read_links_count(fe));
1344 	i_uid_write(inode, le32_to_cpu(fe->i_uid));
1345 	i_gid_write(inode, le32_to_cpu(fe->i_gid));
1346 	inode->i_mode = le16_to_cpu(fe->i_mode);
1347 	if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1348 		inode->i_blocks = 0;
1349 	else
1350 		inode->i_blocks = ocfs2_inode_sector_count(inode);
1351 	inode_set_atime(inode, le64_to_cpu(fe->i_atime),
1352 			le32_to_cpu(fe->i_atime_nsec));
1353 	inode_set_mtime(inode, le64_to_cpu(fe->i_mtime),
1354 			le32_to_cpu(fe->i_mtime_nsec));
1355 	inode_set_ctime(inode, le64_to_cpu(fe->i_ctime),
1356 			le32_to_cpu(fe->i_ctime_nsec));
1357 
1358 	spin_unlock(&OCFS2_I(inode)->ip_lock);
1359 }
1360 
ocfs2_validate_inode_block(struct super_block * sb,struct buffer_head * bh)1361 int ocfs2_validate_inode_block(struct super_block *sb,
1362 			       struct buffer_head *bh)
1363 {
1364 	int rc;
1365 	struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1366 
1367 	trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr);
1368 
1369 	BUG_ON(!buffer_uptodate(bh));
1370 
1371 	/*
1372 	 * If the ecc fails, we return the error but otherwise
1373 	 * leave the filesystem running.  We know any error is
1374 	 * local to this block.
1375 	 */
1376 	rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1377 	if (rc) {
1378 		mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
1379 		     (unsigned long long)bh->b_blocknr);
1380 		goto bail;
1381 	}
1382 
1383 	/*
1384 	 * Errors after here are fatal.
1385 	 */
1386 
1387 	rc = -EINVAL;
1388 
1389 	if (!OCFS2_IS_VALID_DINODE(di)) {
1390 		rc = ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
1391 				 (unsigned long long)bh->b_blocknr, 7,
1392 				 di->i_signature);
1393 		goto bail;
1394 	}
1395 
1396 	if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1397 		rc = ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
1398 				 (unsigned long long)bh->b_blocknr,
1399 				 (unsigned long long)le64_to_cpu(di->i_blkno));
1400 		goto bail;
1401 	}
1402 
1403 	if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1404 		rc = ocfs2_error(sb,
1405 				 "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
1406 				 (unsigned long long)bh->b_blocknr);
1407 		goto bail;
1408 	}
1409 
1410 	if (le32_to_cpu(di->i_fs_generation) !=
1411 	    OCFS2_SB(sb)->fs_generation) {
1412 		rc = ocfs2_error(sb,
1413 				 "Invalid dinode #%llu: fs_generation is %u\n",
1414 				 (unsigned long long)bh->b_blocknr,
1415 				 le32_to_cpu(di->i_fs_generation));
1416 		goto bail;
1417 	}
1418 
1419 	rc = 0;
1420 
1421 bail:
1422 	return rc;
1423 }
1424 
ocfs2_filecheck_validate_inode_block(struct super_block * sb,struct buffer_head * bh)1425 static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
1426 						struct buffer_head *bh)
1427 {
1428 	int rc = 0;
1429 	struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1430 
1431 	trace_ocfs2_filecheck_validate_inode_block(
1432 		(unsigned long long)bh->b_blocknr);
1433 
1434 	BUG_ON(!buffer_uptodate(bh));
1435 
1436 	/*
1437 	 * Call ocfs2_validate_meta_ecc() first since it has ecc repair
1438 	 * function, but we should not return error immediately when ecc
1439 	 * validation fails, because the reason is quite likely the invalid
1440 	 * inode number inputed.
1441 	 */
1442 	rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1443 	if (rc) {
1444 		mlog(ML_ERROR,
1445 		     "Filecheck: checksum failed for dinode %llu\n",
1446 		     (unsigned long long)bh->b_blocknr);
1447 		rc = -OCFS2_FILECHECK_ERR_BLOCKECC;
1448 	}
1449 
1450 	if (!OCFS2_IS_VALID_DINODE(di)) {
1451 		mlog(ML_ERROR,
1452 		     "Filecheck: invalid dinode #%llu: signature = %.*s\n",
1453 		     (unsigned long long)bh->b_blocknr, 7, di->i_signature);
1454 		rc = -OCFS2_FILECHECK_ERR_INVALIDINO;
1455 		goto bail;
1456 	} else if (rc)
1457 		goto bail;
1458 
1459 	if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1460 		mlog(ML_ERROR,
1461 		     "Filecheck: invalid dinode #%llu: i_blkno is %llu\n",
1462 		     (unsigned long long)bh->b_blocknr,
1463 		     (unsigned long long)le64_to_cpu(di->i_blkno));
1464 		rc = -OCFS2_FILECHECK_ERR_BLOCKNO;
1465 		goto bail;
1466 	}
1467 
1468 	if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1469 		mlog(ML_ERROR,
1470 		     "Filecheck: invalid dinode #%llu: OCFS2_VALID_FL "
1471 		     "not set\n",
1472 		     (unsigned long long)bh->b_blocknr);
1473 		rc = -OCFS2_FILECHECK_ERR_VALIDFLAG;
1474 		goto bail;
1475 	}
1476 
1477 	if (le32_to_cpu(di->i_fs_generation) !=
1478 	    OCFS2_SB(sb)->fs_generation) {
1479 		mlog(ML_ERROR,
1480 		     "Filecheck: invalid dinode #%llu: fs_generation is %u\n",
1481 		     (unsigned long long)bh->b_blocknr,
1482 		     le32_to_cpu(di->i_fs_generation));
1483 		rc = -OCFS2_FILECHECK_ERR_GENERATION;
1484 	}
1485 
1486 bail:
1487 	return rc;
1488 }
1489 
ocfs2_filecheck_repair_inode_block(struct super_block * sb,struct buffer_head * bh)1490 static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
1491 					      struct buffer_head *bh)
1492 {
1493 	int changed = 0;
1494 	struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1495 
1496 	if (!ocfs2_filecheck_validate_inode_block(sb, bh))
1497 		return 0;
1498 
1499 	trace_ocfs2_filecheck_repair_inode_block(
1500 		(unsigned long long)bh->b_blocknr);
1501 
1502 	if (ocfs2_is_hard_readonly(OCFS2_SB(sb)) ||
1503 	    ocfs2_is_soft_readonly(OCFS2_SB(sb))) {
1504 		mlog(ML_ERROR,
1505 		     "Filecheck: cannot repair dinode #%llu "
1506 		     "on readonly filesystem\n",
1507 		     (unsigned long long)bh->b_blocknr);
1508 		return -OCFS2_FILECHECK_ERR_READONLY;
1509 	}
1510 
1511 	if (buffer_jbd(bh)) {
1512 		mlog(ML_ERROR,
1513 		     "Filecheck: cannot repair dinode #%llu, "
1514 		     "its buffer is in jbd\n",
1515 		     (unsigned long long)bh->b_blocknr);
1516 		return -OCFS2_FILECHECK_ERR_INJBD;
1517 	}
1518 
1519 	if (!OCFS2_IS_VALID_DINODE(di)) {
1520 		/* Cannot fix invalid inode block */
1521 		return -OCFS2_FILECHECK_ERR_INVALIDINO;
1522 	}
1523 
1524 	if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1525 		/* Cannot just add VALID_FL flag back as a fix,
1526 		 * need more things to check here.
1527 		 */
1528 		return -OCFS2_FILECHECK_ERR_VALIDFLAG;
1529 	}
1530 
1531 	if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1532 		di->i_blkno = cpu_to_le64(bh->b_blocknr);
1533 		changed = 1;
1534 		mlog(ML_ERROR,
1535 		     "Filecheck: reset dinode #%llu: i_blkno to %llu\n",
1536 		     (unsigned long long)bh->b_blocknr,
1537 		     (unsigned long long)le64_to_cpu(di->i_blkno));
1538 	}
1539 
1540 	if (le32_to_cpu(di->i_fs_generation) !=
1541 	    OCFS2_SB(sb)->fs_generation) {
1542 		di->i_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation);
1543 		changed = 1;
1544 		mlog(ML_ERROR,
1545 		     "Filecheck: reset dinode #%llu: fs_generation to %u\n",
1546 		     (unsigned long long)bh->b_blocknr,
1547 		     le32_to_cpu(di->i_fs_generation));
1548 	}
1549 
1550 	if (changed || ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check)) {
1551 		ocfs2_compute_meta_ecc(sb, bh->b_data, &di->i_check);
1552 		mark_buffer_dirty(bh);
1553 		mlog(ML_ERROR,
1554 		     "Filecheck: reset dinode #%llu: compute meta ecc\n",
1555 		     (unsigned long long)bh->b_blocknr);
1556 	}
1557 
1558 	return 0;
1559 }
1560 
1561 static int
ocfs2_filecheck_read_inode_block_full(struct inode * inode,struct buffer_head ** bh,int flags,int type)1562 ocfs2_filecheck_read_inode_block_full(struct inode *inode,
1563 				      struct buffer_head **bh,
1564 				      int flags, int type)
1565 {
1566 	int rc;
1567 	struct buffer_head *tmp = *bh;
1568 
1569 	if (!type) /* Check inode block */
1570 		rc = ocfs2_read_blocks(INODE_CACHE(inode),
1571 				OCFS2_I(inode)->ip_blkno,
1572 				1, &tmp, flags,
1573 				ocfs2_filecheck_validate_inode_block);
1574 	else /* Repair inode block */
1575 		rc = ocfs2_read_blocks(INODE_CACHE(inode),
1576 				OCFS2_I(inode)->ip_blkno,
1577 				1, &tmp, flags,
1578 				ocfs2_filecheck_repair_inode_block);
1579 
1580 	/* If ocfs2_read_blocks() got us a new bh, pass it up. */
1581 	if (!rc && !*bh)
1582 		*bh = tmp;
1583 
1584 	return rc;
1585 }
1586 
ocfs2_read_inode_block_full(struct inode * inode,struct buffer_head ** bh,int flags)1587 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
1588 				int flags)
1589 {
1590 	int rc;
1591 	struct buffer_head *tmp = *bh;
1592 
1593 	rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno,
1594 			       1, &tmp, flags, ocfs2_validate_inode_block);
1595 
1596 	/* If ocfs2_read_blocks() got us a new bh, pass it up. */
1597 	if (!rc && !*bh)
1598 		*bh = tmp;
1599 
1600 	return rc;
1601 }
1602 
ocfs2_read_inode_block(struct inode * inode,struct buffer_head ** bh)1603 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
1604 {
1605 	return ocfs2_read_inode_block_full(inode, bh, 0);
1606 }
1607 
1608 
ocfs2_inode_cache_owner(struct ocfs2_caching_info * ci)1609 static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci)
1610 {
1611 	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1612 
1613 	return oi->ip_blkno;
1614 }
1615 
ocfs2_inode_cache_get_super(struct ocfs2_caching_info * ci)1616 static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci)
1617 {
1618 	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1619 
1620 	return oi->vfs_inode.i_sb;
1621 }
1622 
ocfs2_inode_cache_lock(struct ocfs2_caching_info * ci)1623 static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
1624 {
1625 	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1626 
1627 	spin_lock(&oi->ip_lock);
1628 }
1629 
ocfs2_inode_cache_unlock(struct ocfs2_caching_info * ci)1630 static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
1631 {
1632 	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1633 
1634 	spin_unlock(&oi->ip_lock);
1635 }
1636 
ocfs2_inode_cache_io_lock(struct ocfs2_caching_info * ci)1637 static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci)
1638 {
1639 	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1640 
1641 	mutex_lock(&oi->ip_io_mutex);
1642 }
1643 
ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info * ci)1644 static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci)
1645 {
1646 	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1647 
1648 	mutex_unlock(&oi->ip_io_mutex);
1649 }
1650 
1651 const struct ocfs2_caching_operations ocfs2_inode_caching_ops = {
1652 	.co_owner		= ocfs2_inode_cache_owner,
1653 	.co_get_super		= ocfs2_inode_cache_get_super,
1654 	.co_cache_lock		= ocfs2_inode_cache_lock,
1655 	.co_cache_unlock	= ocfs2_inode_cache_unlock,
1656 	.co_io_lock		= ocfs2_inode_cache_io_lock,
1657 	.co_io_unlock		= ocfs2_inode_cache_io_unlock,
1658 };
1659 
1660