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TOMOYO Linux Cross Reference
Linux/fs/ocfs2/inode.c

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  1 /* -*- mode: c; c-basic-offset: 8; -*-
  2  * vim: noexpandtab sw=8 ts=8 sts=0:
  3  *
  4  * inode.c
  5  *
  6  * vfs' aops, fops, dops and iops
  7  *
  8  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
  9  *
 10  * This program is free software; you can redistribute it and/or
 11  * modify it under the terms of the GNU General Public
 12  * License as published by the Free Software Foundation; either
 13  * version 2 of the License, or (at your option) any later version.
 14  *
 15  * This program is distributed in the hope that it will be useful,
 16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 18  * General Public License for more details.
 19  *
 20  * You should have received a copy of the GNU General Public
 21  * License along with this program; if not, write to the
 22  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 23  * Boston, MA 021110-1307, USA.
 24  */
 25 
 26 #include <linux/fs.h>
 27 #include <linux/types.h>
 28 #include <linux/highmem.h>
 29 #include <linux/pagemap.h>
 30 #include <linux/quotaops.h>
 31 
 32 #include <asm/byteorder.h>
 33 
 34 #include <cluster/masklog.h>
 35 
 36 #include "ocfs2.h"
 37 
 38 #include "alloc.h"
 39 #include "dir.h"
 40 #include "blockcheck.h"
 41 #include "dlmglue.h"
 42 #include "extent_map.h"
 43 #include "file.h"
 44 #include "heartbeat.h"
 45 #include "inode.h"
 46 #include "journal.h"
 47 #include "namei.h"
 48 #include "suballoc.h"
 49 #include "super.h"
 50 #include "symlink.h"
 51 #include "sysfile.h"
 52 #include "uptodate.h"
 53 #include "xattr.h"
 54 #include "refcounttree.h"
 55 #include "ocfs2_trace.h"
 56 #include "filecheck.h"
 57 
 58 #include "buffer_head_io.h"
 59 
 60 struct ocfs2_find_inode_args
 61 {
 62         u64             fi_blkno;
 63         unsigned long   fi_ino;
 64         unsigned int    fi_flags;
 65         unsigned int    fi_sysfile_type;
 66 };
 67 
 68 static struct lock_class_key ocfs2_sysfile_lock_key[NUM_SYSTEM_INODES];
 69 
 70 static int ocfs2_read_locked_inode(struct inode *inode,
 71                                    struct ocfs2_find_inode_args *args);
 72 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
 73 static int ocfs2_find_actor(struct inode *inode, void *opaque);
 74 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
 75                                     struct inode *inode,
 76                                     struct buffer_head *fe_bh);
 77 
 78 static int ocfs2_filecheck_read_inode_block_full(struct inode *inode,
 79                                                  struct buffer_head **bh,
 80                                                  int flags, int type);
 81 static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
 82                                                 struct buffer_head *bh);
 83 static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
 84                                               struct buffer_head *bh);
 85 
 86 void ocfs2_set_inode_flags(struct inode *inode)
 87 {
 88         unsigned int flags = OCFS2_I(inode)->ip_attr;
 89 
 90         inode->i_flags &= ~(S_IMMUTABLE |
 91                 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
 92 
 93         if (flags & OCFS2_IMMUTABLE_FL)
 94                 inode->i_flags |= S_IMMUTABLE;
 95 
 96         if (flags & OCFS2_SYNC_FL)
 97                 inode->i_flags |= S_SYNC;
 98         if (flags & OCFS2_APPEND_FL)
 99                 inode->i_flags |= S_APPEND;
100         if (flags & OCFS2_NOATIME_FL)
101                 inode->i_flags |= S_NOATIME;
102         if (flags & OCFS2_DIRSYNC_FL)
103                 inode->i_flags |= S_DIRSYNC;
104 }
105 
106 /* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
107 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
108 {
109         unsigned int flags = oi->vfs_inode.i_flags;
110 
111         oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
112                         OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
113         if (flags & S_SYNC)
114                 oi->ip_attr |= OCFS2_SYNC_FL;
115         if (flags & S_APPEND)
116                 oi->ip_attr |= OCFS2_APPEND_FL;
117         if (flags & S_IMMUTABLE)
118                 oi->ip_attr |= OCFS2_IMMUTABLE_FL;
119         if (flags & S_NOATIME)
120                 oi->ip_attr |= OCFS2_NOATIME_FL;
121         if (flags & S_DIRSYNC)
122                 oi->ip_attr |= OCFS2_DIRSYNC_FL;
123 }
124 
125 struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno)
126 {
127         struct ocfs2_find_inode_args args;
128 
129         args.fi_blkno = blkno;
130         args.fi_flags = 0;
131         args.fi_ino = ino_from_blkno(sb, blkno);
132         args.fi_sysfile_type = 0;
133 
134         return ilookup5(sb, blkno, ocfs2_find_actor, &args);
135 }
136 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
137                          int sysfile_type)
138 {
139         int rc = 0;
140         struct inode *inode = NULL;
141         struct super_block *sb = osb->sb;
142         struct ocfs2_find_inode_args args;
143         journal_t *journal = OCFS2_SB(sb)->journal->j_journal;
144 
145         trace_ocfs2_iget_begin((unsigned long long)blkno, flags,
146                                sysfile_type);
147 
148         /* Ok. By now we've either got the offsets passed to us by the
149          * caller, or we just pulled them off the bh. Lets do some
150          * sanity checks to make sure they're OK. */
151         if (blkno == 0) {
152                 inode = ERR_PTR(-EINVAL);
153                 mlog_errno(PTR_ERR(inode));
154                 goto bail;
155         }
156 
157         args.fi_blkno = blkno;
158         args.fi_flags = flags;
159         args.fi_ino = ino_from_blkno(sb, blkno);
160         args.fi_sysfile_type = sysfile_type;
161 
162         inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
163                              ocfs2_init_locked_inode, &args);
164         /* inode was *not* in the inode cache. 2.6.x requires
165          * us to do our own read_inode call and unlock it
166          * afterwards. */
167         if (inode == NULL) {
168                 inode = ERR_PTR(-ENOMEM);
169                 mlog_errno(PTR_ERR(inode));
170                 goto bail;
171         }
172         trace_ocfs2_iget5_locked(inode->i_state);
173         if (inode->i_state & I_NEW) {
174                 rc = ocfs2_read_locked_inode(inode, &args);
175                 unlock_new_inode(inode);
176         }
177         if (is_bad_inode(inode)) {
178                 iput(inode);
179                 inode = ERR_PTR(rc);
180                 goto bail;
181         }
182 
183         /*
184          * Set transaction id's of transactions that have to be committed
185          * to finish f[data]sync. We set them to currently running transaction
186          * as we cannot be sure that the inode or some of its metadata isn't
187          * part of the transaction - the inode could have been reclaimed and
188          * now it is reread from disk.
189          */
190         if (journal) {
191                 transaction_t *transaction;
192                 tid_t tid;
193                 struct ocfs2_inode_info *oi = OCFS2_I(inode);
194 
195                 read_lock(&journal->j_state_lock);
196                 if (journal->j_running_transaction)
197                         transaction = journal->j_running_transaction;
198                 else
199                         transaction = journal->j_committing_transaction;
200                 if (transaction)
201                         tid = transaction->t_tid;
202                 else
203                         tid = journal->j_commit_sequence;
204                 read_unlock(&journal->j_state_lock);
205                 oi->i_sync_tid = tid;
206                 oi->i_datasync_tid = tid;
207         }
208 
209 bail:
210         if (!IS_ERR(inode)) {
211                 trace_ocfs2_iget_end(inode, 
212                         (unsigned long long)OCFS2_I(inode)->ip_blkno);
213         }
214 
215         return inode;
216 }
217 
218 
219 /*
220  * here's how inodes get read from disk:
221  * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
222  * found? : return the in-memory inode
223  * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
224  */
225 
226 static int ocfs2_find_actor(struct inode *inode, void *opaque)
227 {
228         struct ocfs2_find_inode_args *args = NULL;
229         struct ocfs2_inode_info *oi = OCFS2_I(inode);
230         int ret = 0;
231 
232         args = opaque;
233 
234         mlog_bug_on_msg(!inode, "No inode in find actor!\n");
235 
236         trace_ocfs2_find_actor(inode, inode->i_ino, opaque, args->fi_blkno);
237 
238         if (oi->ip_blkno != args->fi_blkno)
239                 goto bail;
240 
241         ret = 1;
242 bail:
243         return ret;
244 }
245 
246 /*
247  * initialize the new inode, but don't do anything that would cause
248  * us to sleep.
249  * return 0 on success, 1 on failure
250  */
251 static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
252 {
253         struct ocfs2_find_inode_args *args = opaque;
254         static struct lock_class_key ocfs2_quota_ip_alloc_sem_key,
255                                      ocfs2_file_ip_alloc_sem_key;
256 
257         inode->i_ino = args->fi_ino;
258         OCFS2_I(inode)->ip_blkno = args->fi_blkno;
259         if (args->fi_sysfile_type != 0)
260                 lockdep_set_class(&inode->i_rwsem,
261                         &ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
262         if (args->fi_sysfile_type == USER_QUOTA_SYSTEM_INODE ||
263             args->fi_sysfile_type == GROUP_QUOTA_SYSTEM_INODE ||
264             args->fi_sysfile_type == LOCAL_USER_QUOTA_SYSTEM_INODE ||
265             args->fi_sysfile_type == LOCAL_GROUP_QUOTA_SYSTEM_INODE)
266                 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
267                                   &ocfs2_quota_ip_alloc_sem_key);
268         else
269                 lockdep_set_class(&OCFS2_I(inode)->ip_alloc_sem,
270                                   &ocfs2_file_ip_alloc_sem_key);
271 
272         return 0;
273 }
274 
275 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
276                           int create_ino)
277 {
278         struct super_block *sb;
279         struct ocfs2_super *osb;
280         int use_plocks = 1;
281 
282         sb = inode->i_sb;
283         osb = OCFS2_SB(sb);
284 
285         if ((osb->s_mount_opt & OCFS2_MOUNT_LOCALFLOCKS) ||
286             ocfs2_mount_local(osb) || !ocfs2_stack_supports_plocks())
287                 use_plocks = 0;
288 
289         /*
290          * These have all been checked by ocfs2_read_inode_block() or set
291          * by ocfs2_mknod_locked(), so a failure is a code bug.
292          */
293         BUG_ON(!OCFS2_IS_VALID_DINODE(fe));  /* This means that read_inode
294                                                 cannot create a superblock
295                                                 inode today.  change if
296                                                 that is needed. */
297         BUG_ON(!(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL)));
298         BUG_ON(le32_to_cpu(fe->i_fs_generation) != osb->fs_generation);
299 
300 
301         OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
302         OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
303         OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
304 
305         inode->i_version = 1;
306         inode->i_generation = le32_to_cpu(fe->i_generation);
307         inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
308         inode->i_mode = le16_to_cpu(fe->i_mode);
309         i_uid_write(inode, le32_to_cpu(fe->i_uid));
310         i_gid_write(inode, le32_to_cpu(fe->i_gid));
311 
312         /* Fast symlinks will have i_size but no allocated clusters. */
313         if (S_ISLNK(inode->i_mode) && !fe->i_clusters) {
314                 inode->i_blocks = 0;
315                 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
316         } else {
317                 inode->i_blocks = ocfs2_inode_sector_count(inode);
318                 inode->i_mapping->a_ops = &ocfs2_aops;
319         }
320         inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
321         inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
322         inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
323         inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
324         inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
325         inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
326 
327         if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
328                 mlog(ML_ERROR,
329                      "ip_blkno %llu != i_blkno %llu!\n",
330                      (unsigned long long)OCFS2_I(inode)->ip_blkno,
331                      (unsigned long long)le64_to_cpu(fe->i_blkno));
332 
333         set_nlink(inode, ocfs2_read_links_count(fe));
334 
335         trace_ocfs2_populate_inode(OCFS2_I(inode)->ip_blkno,
336                                    le32_to_cpu(fe->i_flags));
337         if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) {
338                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
339                 inode->i_flags |= S_NOQUOTA;
340         }
341   
342         if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
343                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
344         } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
345                 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
346         } else if (fe->i_flags & cpu_to_le32(OCFS2_QUOTA_FL)) {
347                 inode->i_flags |= S_NOQUOTA;
348         } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
349                 /* we can't actually hit this as read_inode can't
350                  * handle superblocks today ;-) */
351                 BUG();
352         }
353 
354         switch (inode->i_mode & S_IFMT) {
355             case S_IFREG:
356                     if (use_plocks)
357                             inode->i_fop = &ocfs2_fops;
358                     else
359                             inode->i_fop = &ocfs2_fops_no_plocks;
360                     inode->i_op = &ocfs2_file_iops;
361                     i_size_write(inode, le64_to_cpu(fe->i_size));
362                     break;
363             case S_IFDIR:
364                     inode->i_op = &ocfs2_dir_iops;
365                     if (use_plocks)
366                             inode->i_fop = &ocfs2_dops;
367                     else
368                             inode->i_fop = &ocfs2_dops_no_plocks;
369                     i_size_write(inode, le64_to_cpu(fe->i_size));
370                     OCFS2_I(inode)->ip_dir_lock_gen = 1;
371                     break;
372             case S_IFLNK:
373                     inode->i_op = &ocfs2_symlink_inode_operations;
374                     inode_nohighmem(inode);
375                     i_size_write(inode, le64_to_cpu(fe->i_size));
376                     break;
377             default:
378                     inode->i_op = &ocfs2_special_file_iops;
379                     init_special_inode(inode, inode->i_mode,
380                                        inode->i_rdev);
381                     break;
382         }
383 
384         if (create_ino) {
385                 inode->i_ino = ino_from_blkno(inode->i_sb,
386                                le64_to_cpu(fe->i_blkno));
387 
388                 /*
389                  * If we ever want to create system files from kernel,
390                  * the generation argument to
391                  * ocfs2_inode_lock_res_init() will have to change.
392                  */
393                 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
394 
395                 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
396                                           OCFS2_LOCK_TYPE_META, 0, inode);
397 
398                 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
399                                           OCFS2_LOCK_TYPE_OPEN, 0, inode);
400         }
401 
402         ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
403                                   OCFS2_LOCK_TYPE_RW, inode->i_generation,
404                                   inode);
405 
406         ocfs2_set_inode_flags(inode);
407 
408         OCFS2_I(inode)->ip_last_used_slot = 0;
409         OCFS2_I(inode)->ip_last_used_group = 0;
410 
411         if (S_ISDIR(inode->i_mode))
412                 ocfs2_resv_set_type(&OCFS2_I(inode)->ip_la_data_resv,
413                                     OCFS2_RESV_FLAG_DIR);
414 }
415 
416 static int ocfs2_read_locked_inode(struct inode *inode,
417                                    struct ocfs2_find_inode_args *args)
418 {
419         struct super_block *sb;
420         struct ocfs2_super *osb;
421         struct ocfs2_dinode *fe;
422         struct buffer_head *bh = NULL;
423         int status, can_lock, lock_level = 0;
424         u32 generation = 0;
425 
426         status = -EINVAL;
427         sb = inode->i_sb;
428         osb = OCFS2_SB(sb);
429 
430         /*
431          * To improve performance of cold-cache inode stats, we take
432          * the cluster lock here if possible.
433          *
434          * Generally, OCFS2 never trusts the contents of an inode
435          * unless it's holding a cluster lock, so taking it here isn't
436          * a correctness issue as much as it is a performance
437          * improvement.
438          *
439          * There are three times when taking the lock is not a good idea:
440          *
441          * 1) During startup, before we have initialized the DLM.
442          *
443          * 2) If we are reading certain system files which never get
444          *    cluster locks (local alloc, truncate log).
445          *
446          * 3) If the process doing the iget() is responsible for
447          *    orphan dir recovery. We're holding the orphan dir lock and
448          *    can get into a deadlock with another process on another
449          *    node in ->delete_inode().
450          *
451          * #1 and #2 can be simply solved by never taking the lock
452          * here for system files (which are the only type we read
453          * during mount). It's a heavier approach, but our main
454          * concern is user-accessible files anyway.
455          *
456          * #3 works itself out because we'll eventually take the
457          * cluster lock before trusting anything anyway.
458          */
459         can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
460                 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
461                 && !ocfs2_mount_local(osb);
462 
463         trace_ocfs2_read_locked_inode(
464                 (unsigned long long)OCFS2_I(inode)->ip_blkno, can_lock);
465 
466         /*
467          * To maintain backwards compatibility with older versions of
468          * ocfs2-tools, we still store the generation value for system
469          * files. The only ones that actually matter to userspace are
470          * the journals, but it's easier and inexpensive to just flag
471          * all system files similarly.
472          */
473         if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
474                 generation = osb->fs_generation;
475 
476         ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_inode_lockres,
477                                   OCFS2_LOCK_TYPE_META,
478                                   generation, inode);
479 
480         ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
481                                   OCFS2_LOCK_TYPE_OPEN,
482                                   0, inode);
483 
484         if (can_lock) {
485                 status = ocfs2_open_lock(inode);
486                 if (status) {
487                         make_bad_inode(inode);
488                         mlog_errno(status);
489                         return status;
490                 }
491                 status = ocfs2_inode_lock(inode, NULL, lock_level);
492                 if (status) {
493                         make_bad_inode(inode);
494                         mlog_errno(status);
495                         return status;
496                 }
497         }
498 
499         if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
500                 status = ocfs2_try_open_lock(inode, 0);
501                 if (status) {
502                         make_bad_inode(inode);
503                         return status;
504                 }
505         }
506 
507         if (can_lock) {
508                 if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
509                         status = ocfs2_filecheck_read_inode_block_full(inode,
510                                                 &bh, OCFS2_BH_IGNORE_CACHE, 0);
511                 else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
512                         status = ocfs2_filecheck_read_inode_block_full(inode,
513                                                 &bh, OCFS2_BH_IGNORE_CACHE, 1);
514                 else
515                         status = ocfs2_read_inode_block_full(inode,
516                                                 &bh, OCFS2_BH_IGNORE_CACHE);
517         } else {
518                 status = ocfs2_read_blocks_sync(osb, args->fi_blkno, 1, &bh);
519                 /*
520                  * If buffer is in jbd, then its checksum may not have been
521                  * computed as yet.
522                  */
523                 if (!status && !buffer_jbd(bh)) {
524                         if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_CHK)
525                                 status = ocfs2_filecheck_validate_inode_block(
526                                                                 osb->sb, bh);
527                         else if (args->fi_flags & OCFS2_FI_FLAG_FILECHECK_FIX)
528                                 status = ocfs2_filecheck_repair_inode_block(
529                                                                 osb->sb, bh);
530                         else
531                                 status = ocfs2_validate_inode_block(
532                                                                 osb->sb, bh);
533                 }
534         }
535         if (status < 0) {
536                 mlog_errno(status);
537                 goto bail;
538         }
539 
540         status = -EINVAL;
541         fe = (struct ocfs2_dinode *) bh->b_data;
542 
543         /*
544          * This is a code bug. Right now the caller needs to
545          * understand whether it is asking for a system file inode or
546          * not so the proper lock names can be built.
547          */
548         mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
549                         !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
550                         "Inode %llu: system file state is ambigous\n",
551                         (unsigned long long)args->fi_blkno);
552 
553         if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
554             S_ISBLK(le16_to_cpu(fe->i_mode)))
555                 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
556 
557         ocfs2_populate_inode(inode, fe, 0);
558 
559         BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
560 
561         if (buffer_dirty(bh) && !buffer_jbd(bh)) {
562                 if (can_lock) {
563                         ocfs2_inode_unlock(inode, lock_level);
564                         lock_level = 1;
565                         ocfs2_inode_lock(inode, NULL, lock_level);
566                 }
567                 status = ocfs2_write_block(osb, bh, INODE_CACHE(inode));
568                 if (status < 0) {
569                         mlog_errno(status);
570                         goto bail;
571                 }
572         }
573 
574         status = 0;
575 
576 bail:
577         if (can_lock)
578                 ocfs2_inode_unlock(inode, lock_level);
579 
580         if (status < 0)
581                 make_bad_inode(inode);
582 
583         brelse(bh);
584 
585         return status;
586 }
587 
588 void ocfs2_sync_blockdev(struct super_block *sb)
589 {
590         sync_blockdev(sb->s_bdev);
591 }
592 
593 static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
594                                      struct inode *inode,
595                                      struct buffer_head *fe_bh)
596 {
597         int status = 0;
598         struct ocfs2_dinode *fe;
599         handle_t *handle = NULL;
600 
601         fe = (struct ocfs2_dinode *) fe_bh->b_data;
602 
603         /*
604          * This check will also skip truncate of inodes with inline
605          * data and fast symlinks.
606          */
607         if (fe->i_clusters) {
608                 if (ocfs2_should_order_data(inode))
609                         ocfs2_begin_ordered_truncate(inode, 0);
610 
611                 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
612                 if (IS_ERR(handle)) {
613                         status = PTR_ERR(handle);
614                         handle = NULL;
615                         mlog_errno(status);
616                         goto out;
617                 }
618 
619                 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
620                                                  fe_bh,
621                                                  OCFS2_JOURNAL_ACCESS_WRITE);
622                 if (status < 0) {
623                         mlog_errno(status);
624                         goto out;
625                 }
626 
627                 i_size_write(inode, 0);
628 
629                 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
630                 if (status < 0) {
631                         mlog_errno(status);
632                         goto out;
633                 }
634 
635                 ocfs2_commit_trans(osb, handle);
636                 handle = NULL;
637 
638                 status = ocfs2_commit_truncate(osb, inode, fe_bh);
639                 if (status < 0) {
640                         mlog_errno(status);
641                         goto out;
642                 }
643         }
644 
645 out:
646         if (handle)
647                 ocfs2_commit_trans(osb, handle);
648         return status;
649 }
650 
651 static int ocfs2_remove_inode(struct inode *inode,
652                               struct buffer_head *di_bh,
653                               struct inode *orphan_dir_inode,
654                               struct buffer_head *orphan_dir_bh)
655 {
656         int status;
657         struct inode *inode_alloc_inode = NULL;
658         struct buffer_head *inode_alloc_bh = NULL;
659         handle_t *handle;
660         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
661         struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
662 
663         inode_alloc_inode =
664                 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
665                                             le16_to_cpu(di->i_suballoc_slot));
666         if (!inode_alloc_inode) {
667                 status = -ENOENT;
668                 mlog_errno(status);
669                 goto bail;
670         }
671 
672         inode_lock(inode_alloc_inode);
673         status = ocfs2_inode_lock(inode_alloc_inode, &inode_alloc_bh, 1);
674         if (status < 0) {
675                 inode_unlock(inode_alloc_inode);
676 
677                 mlog_errno(status);
678                 goto bail;
679         }
680 
681         handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS +
682                                    ocfs2_quota_trans_credits(inode->i_sb));
683         if (IS_ERR(handle)) {
684                 status = PTR_ERR(handle);
685                 mlog_errno(status);
686                 goto bail_unlock;
687         }
688 
689         if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
690                 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
691                                           orphan_dir_bh, false);
692                 if (status < 0) {
693                         mlog_errno(status);
694                         goto bail_commit;
695                 }
696         }
697 
698         /* set the inodes dtime */
699         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
700                                          OCFS2_JOURNAL_ACCESS_WRITE);
701         if (status < 0) {
702                 mlog_errno(status);
703                 goto bail_commit;
704         }
705 
706         di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
707         di->i_flags &= cpu_to_le32(~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
708         ocfs2_journal_dirty(handle, di_bh);
709 
710         ocfs2_remove_from_cache(INODE_CACHE(inode), di_bh);
711         dquot_free_inode(inode);
712 
713         status = ocfs2_free_dinode(handle, inode_alloc_inode,
714                                    inode_alloc_bh, di);
715         if (status < 0)
716                 mlog_errno(status);
717 
718 bail_commit:
719         ocfs2_commit_trans(osb, handle);
720 bail_unlock:
721         ocfs2_inode_unlock(inode_alloc_inode, 1);
722         inode_unlock(inode_alloc_inode);
723         brelse(inode_alloc_bh);
724 bail:
725         iput(inode_alloc_inode);
726 
727         return status;
728 }
729 
730 /*
731  * Serialize with orphan dir recovery. If the process doing
732  * recovery on this orphan dir does an iget() with the dir
733  * i_mutex held, we'll deadlock here. Instead we detect this
734  * and exit early - recovery will wipe this inode for us.
735  */
736 static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
737                                              int slot)
738 {
739         int ret = 0;
740 
741         spin_lock(&osb->osb_lock);
742         if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
743                 ret = -EDEADLK;
744                 goto out;
745         }
746         /* This signals to the orphan recovery process that it should
747          * wait for us to handle the wipe. */
748         osb->osb_orphan_wipes[slot]++;
749 out:
750         spin_unlock(&osb->osb_lock);
751         trace_ocfs2_check_orphan_recovery_state(slot, ret);
752         return ret;
753 }
754 
755 static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
756                                          int slot)
757 {
758         spin_lock(&osb->osb_lock);
759         osb->osb_orphan_wipes[slot]--;
760         spin_unlock(&osb->osb_lock);
761 
762         wake_up(&osb->osb_wipe_event);
763 }
764 
765 static int ocfs2_wipe_inode(struct inode *inode,
766                             struct buffer_head *di_bh)
767 {
768         int status, orphaned_slot = -1;
769         struct inode *orphan_dir_inode = NULL;
770         struct buffer_head *orphan_dir_bh = NULL;
771         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
772         struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
773 
774         if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
775                 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
776 
777                 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
778                 if (status)
779                         return status;
780 
781                 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
782                                                                ORPHAN_DIR_SYSTEM_INODE,
783                                                                orphaned_slot);
784                 if (!orphan_dir_inode) {
785                         status = -ENOENT;
786                         mlog_errno(status);
787                         goto bail;
788                 }
789 
790                 /* Lock the orphan dir. The lock will be held for the entire
791                  * delete_inode operation. We do this now to avoid races with
792                  * recovery completion on other nodes. */
793                 inode_lock(orphan_dir_inode);
794                 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
795                 if (status < 0) {
796                         inode_unlock(orphan_dir_inode);
797 
798                         mlog_errno(status);
799                         goto bail;
800                 }
801         }
802 
803         /* we do this while holding the orphan dir lock because we
804          * don't want recovery being run from another node to try an
805          * inode delete underneath us -- this will result in two nodes
806          * truncating the same file! */
807         status = ocfs2_truncate_for_delete(osb, inode, di_bh);
808         if (status < 0) {
809                 mlog_errno(status);
810                 goto bail_unlock_dir;
811         }
812 
813         /* Remove any dir index tree */
814         if (S_ISDIR(inode->i_mode)) {
815                 status = ocfs2_dx_dir_truncate(inode, di_bh);
816                 if (status) {
817                         mlog_errno(status);
818                         goto bail_unlock_dir;
819                 }
820         }
821 
822         /*Free extended attribute resources associated with this inode.*/
823         status = ocfs2_xattr_remove(inode, di_bh);
824         if (status < 0) {
825                 mlog_errno(status);
826                 goto bail_unlock_dir;
827         }
828 
829         status = ocfs2_remove_refcount_tree(inode, di_bh);
830         if (status < 0) {
831                 mlog_errno(status);
832                 goto bail_unlock_dir;
833         }
834 
835         status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
836                                     orphan_dir_bh);
837         if (status < 0)
838                 mlog_errno(status);
839 
840 bail_unlock_dir:
841         if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)
842                 return status;
843 
844         ocfs2_inode_unlock(orphan_dir_inode, 1);
845         inode_unlock(orphan_dir_inode);
846         brelse(orphan_dir_bh);
847 bail:
848         iput(orphan_dir_inode);
849         ocfs2_signal_wipe_completion(osb, orphaned_slot);
850 
851         return status;
852 }
853 
854 /* There is a series of simple checks that should be done before a
855  * trylock is even considered. Encapsulate those in this function. */
856 static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
857 {
858         int ret = 0;
859         struct ocfs2_inode_info *oi = OCFS2_I(inode);
860         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
861 
862         trace_ocfs2_inode_is_valid_to_delete(current, osb->dc_task,
863                                              (unsigned long long)oi->ip_blkno,
864                                              oi->ip_flags);
865 
866         /* We shouldn't be getting here for the root directory
867          * inode.. */
868         if (inode == osb->root_inode) {
869                 mlog(ML_ERROR, "Skipping delete of root inode.\n");
870                 goto bail;
871         }
872 
873         /*
874          * If we're coming from downconvert_thread we can't go into our own
875          * voting [hello, deadlock city!] so we cannot delete the inode. But
876          * since we dropped last inode ref when downconverting dentry lock,
877          * we cannot have the file open and thus the node doing unlink will
878          * take care of deleting the inode.
879          */
880         if (current == osb->dc_task)
881                 goto bail;
882 
883         spin_lock(&oi->ip_lock);
884         /* OCFS2 *never* deletes system files. This should technically
885          * never get here as system file inodes should always have a
886          * positive link count. */
887         if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
888                 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
889                      (unsigned long long)oi->ip_blkno);
890                 goto bail_unlock;
891         }
892 
893         ret = 1;
894 bail_unlock:
895         spin_unlock(&oi->ip_lock);
896 bail:
897         return ret;
898 }
899 
900 /* Query the cluster to determine whether we should wipe an inode from
901  * disk or not.
902  *
903  * Requires the inode to have the cluster lock. */
904 static int ocfs2_query_inode_wipe(struct inode *inode,
905                                   struct buffer_head *di_bh,
906                                   int *wipe)
907 {
908         int status = 0, reason = 0;
909         struct ocfs2_inode_info *oi = OCFS2_I(inode);
910         struct ocfs2_dinode *di;
911 
912         *wipe = 0;
913 
914         trace_ocfs2_query_inode_wipe_begin((unsigned long long)oi->ip_blkno,
915                                            inode->i_nlink);
916 
917         /* While we were waiting for the cluster lock in
918          * ocfs2_delete_inode, another node might have asked to delete
919          * the inode. Recheck our flags to catch this. */
920         if (!ocfs2_inode_is_valid_to_delete(inode)) {
921                 reason = 1;
922                 goto bail;
923         }
924 
925         /* Now that we have an up to date inode, we can double check
926          * the link count. */
927         if (inode->i_nlink)
928                 goto bail;
929 
930         /* Do some basic inode verification... */
931         di = (struct ocfs2_dinode *) di_bh->b_data;
932         if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL)) &&
933             !(oi->ip_flags & OCFS2_INODE_SKIP_ORPHAN_DIR)) {
934                 /*
935                  * Inodes in the orphan dir must have ORPHANED_FL.  The only
936                  * inodes that come back out of the orphan dir are reflink
937                  * targets. A reflink target may be moved out of the orphan
938                  * dir between the time we scan the directory and the time we
939                  * process it. This would lead to HAS_REFCOUNT_FL being set but
940                  * ORPHANED_FL not.
941                  */
942                 if (di->i_dyn_features & cpu_to_le16(OCFS2_HAS_REFCOUNT_FL)) {
943                         reason = 2;
944                         goto bail;
945                 }
946 
947                 /* for lack of a better error? */
948                 status = -EEXIST;
949                 mlog(ML_ERROR,
950                      "Inode %llu (on-disk %llu) not orphaned! "
951                      "Disk flags  0x%x, inode flags 0x%x\n",
952                      (unsigned long long)oi->ip_blkno,
953                      (unsigned long long)le64_to_cpu(di->i_blkno),
954                      le32_to_cpu(di->i_flags), oi->ip_flags);
955                 goto bail;
956         }
957 
958         /* has someone already deleted us?! baaad... */
959         if (di->i_dtime) {
960                 status = -EEXIST;
961                 mlog_errno(status);
962                 goto bail;
963         }
964 
965         /*
966          * This is how ocfs2 determines whether an inode is still live
967          * within the cluster. Every node takes a shared read lock on
968          * the inode open lock in ocfs2_read_locked_inode(). When we
969          * get to ->delete_inode(), each node tries to convert it's
970          * lock to an exclusive. Trylocks are serialized by the inode
971          * meta data lock. If the upconvert succeeds, we know the inode
972          * is no longer live and can be deleted.
973          *
974          * Though we call this with the meta data lock held, the
975          * trylock keeps us from ABBA deadlock.
976          */
977         status = ocfs2_try_open_lock(inode, 1);
978         if (status == -EAGAIN) {
979                 status = 0;
980                 reason = 3;
981                 goto bail;
982         }
983         if (status < 0) {
984                 mlog_errno(status);
985                 goto bail;
986         }
987 
988         *wipe = 1;
989         trace_ocfs2_query_inode_wipe_succ(le16_to_cpu(di->i_orphaned_slot));
990 
991 bail:
992         trace_ocfs2_query_inode_wipe_end(status, reason);
993         return status;
994 }
995 
996 /* Support function for ocfs2_delete_inode. Will help us keep the
997  * inode data in a consistent state for clear_inode. Always truncates
998  * pages, optionally sync's them first. */
999 static void ocfs2_cleanup_delete_inode(struct inode *inode,
1000                                        int sync_data)
1001 {
1002         trace_ocfs2_cleanup_delete_inode(
1003                 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
1004         if (sync_data)
1005                 filemap_write_and_wait(inode->i_mapping);
1006         truncate_inode_pages_final(&inode->i_data);
1007 }
1008 
1009 static void ocfs2_delete_inode(struct inode *inode)
1010 {
1011         int wipe, status;
1012         sigset_t oldset;
1013         struct buffer_head *di_bh = NULL;
1014         struct ocfs2_dinode *di = NULL;
1015 
1016         trace_ocfs2_delete_inode(inode->i_ino,
1017                                  (unsigned long long)OCFS2_I(inode)->ip_blkno,
1018                                  is_bad_inode(inode));
1019 
1020         /* When we fail in read_inode() we mark inode as bad. The second test
1021          * catches the case when inode allocation fails before allocating
1022          * a block for inode. */
1023         if (is_bad_inode(inode) || !OCFS2_I(inode)->ip_blkno)
1024                 goto bail;
1025 
1026         if (!ocfs2_inode_is_valid_to_delete(inode)) {
1027                 /* It's probably not necessary to truncate_inode_pages
1028                  * here but we do it for safety anyway (it will most
1029                  * likely be a no-op anyway) */
1030                 ocfs2_cleanup_delete_inode(inode, 0);
1031                 goto bail;
1032         }
1033 
1034         dquot_initialize(inode);
1035 
1036         /* We want to block signals in delete_inode as the lock and
1037          * messaging paths may return us -ERESTARTSYS. Which would
1038          * cause us to exit early, resulting in inodes being orphaned
1039          * forever. */
1040         ocfs2_block_signals(&oldset);
1041 
1042         /*
1043          * Synchronize us against ocfs2_get_dentry. We take this in
1044          * shared mode so that all nodes can still concurrently
1045          * process deletes.
1046          */
1047         status = ocfs2_nfs_sync_lock(OCFS2_SB(inode->i_sb), 0);
1048         if (status < 0) {
1049                 mlog(ML_ERROR, "getting nfs sync lock(PR) failed %d\n", status);
1050                 ocfs2_cleanup_delete_inode(inode, 0);
1051                 goto bail_unblock;
1052         }
1053         /* Lock down the inode. This gives us an up to date view of
1054          * it's metadata (for verification), and allows us to
1055          * serialize delete_inode on multiple nodes.
1056          *
1057          * Even though we might be doing a truncate, we don't take the
1058          * allocation lock here as it won't be needed - nobody will
1059          * have the file open.
1060          */
1061         status = ocfs2_inode_lock(inode, &di_bh, 1);
1062         if (status < 0) {
1063                 if (status != -ENOENT)
1064                         mlog_errno(status);
1065                 ocfs2_cleanup_delete_inode(inode, 0);
1066                 goto bail_unlock_nfs_sync;
1067         }
1068 
1069         di = (struct ocfs2_dinode *)di_bh->b_data;
1070         /* Skip inode deletion and wait for dio orphan entry recovered
1071          * first */
1072         if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
1073                 ocfs2_cleanup_delete_inode(inode, 0);
1074                 goto bail_unlock_inode;
1075         }
1076 
1077         /* Query the cluster. This will be the final decision made
1078          * before we go ahead and wipe the inode. */
1079         status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
1080         if (!wipe || status < 0) {
1081                 /* Error and remote inode busy both mean we won't be
1082                  * removing the inode, so they take almost the same
1083                  * path. */
1084                 if (status < 0)
1085                         mlog_errno(status);
1086 
1087                 /* Someone in the cluster has disallowed a wipe of
1088                  * this inode, or it was never completely
1089                  * orphaned. Write out the pages and exit now. */
1090                 ocfs2_cleanup_delete_inode(inode, 1);
1091                 goto bail_unlock_inode;
1092         }
1093 
1094         ocfs2_cleanup_delete_inode(inode, 0);
1095 
1096         status = ocfs2_wipe_inode(inode, di_bh);
1097         if (status < 0) {
1098                 if (status != -EDEADLK)
1099                         mlog_errno(status);
1100                 goto bail_unlock_inode;
1101         }
1102 
1103         /*
1104          * Mark the inode as successfully deleted.
1105          *
1106          * This is important for ocfs2_clear_inode() as it will check
1107          * this flag and skip any checkpointing work
1108          *
1109          * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
1110          * the LVB for other nodes.
1111          */
1112         OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
1113 
1114 bail_unlock_inode:
1115         ocfs2_inode_unlock(inode, 1);
1116         brelse(di_bh);
1117 
1118 bail_unlock_nfs_sync:
1119         ocfs2_nfs_sync_unlock(OCFS2_SB(inode->i_sb), 0);
1120 
1121 bail_unblock:
1122         ocfs2_unblock_signals(&oldset);
1123 bail:
1124         return;
1125 }
1126 
1127 static void ocfs2_clear_inode(struct inode *inode)
1128 {
1129         int status;
1130         struct ocfs2_inode_info *oi = OCFS2_I(inode);
1131         struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1132 
1133         clear_inode(inode);
1134         trace_ocfs2_clear_inode((unsigned long long)oi->ip_blkno,
1135                                 inode->i_nlink);
1136 
1137         mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1138                         "Inode=%lu\n", inode->i_ino);
1139 
1140         dquot_drop(inode);
1141 
1142         /* To preven remote deletes we hold open lock before, now it
1143          * is time to unlock PR and EX open locks. */
1144         ocfs2_open_unlock(inode);
1145 
1146         /* Do these before all the other work so that we don't bounce
1147          * the downconvert thread while waiting to destroy the locks. */
1148         ocfs2_mark_lockres_freeing(osb, &oi->ip_rw_lockres);
1149         ocfs2_mark_lockres_freeing(osb, &oi->ip_inode_lockres);
1150         ocfs2_mark_lockres_freeing(osb, &oi->ip_open_lockres);
1151 
1152         ocfs2_resv_discard(&OCFS2_SB(inode->i_sb)->osb_la_resmap,
1153                            &oi->ip_la_data_resv);
1154         ocfs2_resv_init_once(&oi->ip_la_data_resv);
1155 
1156         /* We very well may get a clear_inode before all an inodes
1157          * metadata has hit disk. Of course, we can't drop any cluster
1158          * locks until the journal has finished with it. The only
1159          * exception here are successfully wiped inodes - their
1160          * metadata can now be considered to be part of the system
1161          * inodes from which it came. */
1162         if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1163                 ocfs2_checkpoint_inode(inode);
1164 
1165         mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
1166                         "Clear inode of %llu, inode has io markers\n",
1167                         (unsigned long long)oi->ip_blkno);
1168         mlog_bug_on_msg(!list_empty(&oi->ip_unwritten_list),
1169                         "Clear inode of %llu, inode has unwritten extents\n",
1170                         (unsigned long long)oi->ip_blkno);
1171 
1172         ocfs2_extent_map_trunc(inode, 0);
1173 
1174         status = ocfs2_drop_inode_locks(inode);
1175         if (status < 0)
1176                 mlog_errno(status);
1177 
1178         ocfs2_lock_res_free(&oi->ip_rw_lockres);
1179         ocfs2_lock_res_free(&oi->ip_inode_lockres);
1180         ocfs2_lock_res_free(&oi->ip_open_lockres);
1181 
1182         ocfs2_metadata_cache_exit(INODE_CACHE(inode));
1183 
1184         mlog_bug_on_msg(INODE_CACHE(inode)->ci_num_cached,
1185                         "Clear inode of %llu, inode has %u cache items\n",
1186                         (unsigned long long)oi->ip_blkno,
1187                         INODE_CACHE(inode)->ci_num_cached);
1188 
1189         mlog_bug_on_msg(!(INODE_CACHE(inode)->ci_flags & OCFS2_CACHE_FL_INLINE),
1190                         "Clear inode of %llu, inode has a bad flag\n",
1191                         (unsigned long long)oi->ip_blkno);
1192 
1193         mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
1194                         "Clear inode of %llu, inode is locked\n",
1195                         (unsigned long long)oi->ip_blkno);
1196 
1197         mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
1198                         "Clear inode of %llu, io_mutex is locked\n",
1199                         (unsigned long long)oi->ip_blkno);
1200         mutex_unlock(&oi->ip_io_mutex);
1201 
1202         /*
1203          * down_trylock() returns 0, down_write_trylock() returns 1
1204          * kernel 1, world 0
1205          */
1206         mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
1207                         "Clear inode of %llu, alloc_sem is locked\n",
1208                         (unsigned long long)oi->ip_blkno);
1209         up_write(&oi->ip_alloc_sem);
1210 
1211         mlog_bug_on_msg(oi->ip_open_count,
1212                         "Clear inode of %llu has open count %d\n",
1213                         (unsigned long long)oi->ip_blkno, oi->ip_open_count);
1214 
1215         /* Clear all other flags. */
1216         oi->ip_flags = 0;
1217         oi->ip_dir_start_lookup = 0;
1218         oi->ip_blkno = 0ULL;
1219 
1220         /*
1221          * ip_jinode is used to track txns against this inode. We ensure that
1222          * the journal is flushed before journal shutdown. Thus it is safe to
1223          * have inodes get cleaned up after journal shutdown.
1224          */
1225         jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
1226                                        &oi->ip_jinode);
1227 }
1228 
1229 void ocfs2_evict_inode(struct inode *inode)
1230 {
1231         if (!inode->i_nlink ||
1232             (OCFS2_I(inode)->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)) {
1233                 ocfs2_delete_inode(inode);
1234         } else {
1235                 truncate_inode_pages_final(&inode->i_data);
1236         }
1237         ocfs2_clear_inode(inode);
1238 }
1239 
1240 /* Called under inode_lock, with no more references on the
1241  * struct inode, so it's safe here to check the flags field
1242  * and to manipulate i_nlink without any other locks. */
1243 int ocfs2_drop_inode(struct inode *inode)
1244 {
1245         struct ocfs2_inode_info *oi = OCFS2_I(inode);
1246 
1247         trace_ocfs2_drop_inode((unsigned long long)oi->ip_blkno,
1248                                 inode->i_nlink, oi->ip_flags);
1249 
1250         assert_spin_locked(&inode->i_lock);
1251         inode->i_state |= I_WILL_FREE;
1252         spin_unlock(&inode->i_lock);
1253         write_inode_now(inode, 1);
1254         spin_lock(&inode->i_lock);
1255         WARN_ON(inode->i_state & I_NEW);
1256         inode->i_state &= ~I_WILL_FREE;
1257 
1258         return 1;
1259 }
1260 
1261 /*
1262  * This is called from our getattr.
1263  */
1264 int ocfs2_inode_revalidate(struct dentry *dentry)
1265 {
1266         struct inode *inode = d_inode(dentry);
1267         int status = 0;
1268 
1269         trace_ocfs2_inode_revalidate(inode,
1270                 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL,
1271                 inode ? (unsigned long long)OCFS2_I(inode)->ip_flags : 0);
1272 
1273         if (!inode) {
1274                 status = -ENOENT;
1275                 goto bail;
1276         }
1277 
1278         spin_lock(&OCFS2_I(inode)->ip_lock);
1279         if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1280                 spin_unlock(&OCFS2_I(inode)->ip_lock);
1281                 status = -ENOENT;
1282                 goto bail;
1283         }
1284         spin_unlock(&OCFS2_I(inode)->ip_lock);
1285 
1286         /* Let ocfs2_inode_lock do the work of updating our struct
1287          * inode for us. */
1288         status = ocfs2_inode_lock(inode, NULL, 0);
1289         if (status < 0) {
1290                 if (status != -ENOENT)
1291                         mlog_errno(status);
1292                 goto bail;
1293         }
1294         ocfs2_inode_unlock(inode, 0);
1295 bail:
1296         return status;
1297 }
1298 
1299 /*
1300  * Updates a disk inode from a
1301  * struct inode.
1302  * Only takes ip_lock.
1303  */
1304 int ocfs2_mark_inode_dirty(handle_t *handle,
1305                            struct inode *inode,
1306                            struct buffer_head *bh)
1307 {
1308         int status;
1309         struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1310 
1311         trace_ocfs2_mark_inode_dirty((unsigned long long)OCFS2_I(inode)->ip_blkno);
1312 
1313         status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), bh,
1314                                          OCFS2_JOURNAL_ACCESS_WRITE);
1315         if (status < 0) {
1316                 mlog_errno(status);
1317                 goto leave;
1318         }
1319 
1320         spin_lock(&OCFS2_I(inode)->ip_lock);
1321         fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
1322         ocfs2_get_inode_flags(OCFS2_I(inode));
1323         fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
1324         fe->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
1325         spin_unlock(&OCFS2_I(inode)->ip_lock);
1326 
1327         fe->i_size = cpu_to_le64(i_size_read(inode));
1328         ocfs2_set_links_count(fe, inode->i_nlink);
1329         fe->i_uid = cpu_to_le32(i_uid_read(inode));
1330         fe->i_gid = cpu_to_le32(i_gid_read(inode));
1331         fe->i_mode = cpu_to_le16(inode->i_mode);
1332         fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1333         fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1334         fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1335         fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1336         fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1337         fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1338 
1339         ocfs2_journal_dirty(handle, bh);
1340         ocfs2_update_inode_fsync_trans(handle, inode, 1);
1341 leave:
1342         return status;
1343 }
1344 
1345 /*
1346  *
1347  * Updates a struct inode from a disk inode.
1348  * does no i/o, only takes ip_lock.
1349  */
1350 void ocfs2_refresh_inode(struct inode *inode,
1351                          struct ocfs2_dinode *fe)
1352 {
1353         spin_lock(&OCFS2_I(inode)->ip_lock);
1354 
1355         OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
1356         OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1357         OCFS2_I(inode)->ip_dyn_features = le16_to_cpu(fe->i_dyn_features);
1358         ocfs2_set_inode_flags(inode);
1359         i_size_write(inode, le64_to_cpu(fe->i_size));
1360         set_nlink(inode, ocfs2_read_links_count(fe));
1361         i_uid_write(inode, le32_to_cpu(fe->i_uid));
1362         i_gid_write(inode, le32_to_cpu(fe->i_gid));
1363         inode->i_mode = le16_to_cpu(fe->i_mode);
1364         if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1365                 inode->i_blocks = 0;
1366         else
1367                 inode->i_blocks = ocfs2_inode_sector_count(inode);
1368         inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1369         inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1370         inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1371         inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1372         inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1373         inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1374 
1375         spin_unlock(&OCFS2_I(inode)->ip_lock);
1376 }
1377 
1378 int ocfs2_validate_inode_block(struct super_block *sb,
1379                                struct buffer_head *bh)
1380 {
1381         int rc;
1382         struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1383 
1384         trace_ocfs2_validate_inode_block((unsigned long long)bh->b_blocknr);
1385 
1386         BUG_ON(!buffer_uptodate(bh));
1387 
1388         /*
1389          * If the ecc fails, we return the error but otherwise
1390          * leave the filesystem running.  We know any error is
1391          * local to this block.
1392          */
1393         rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1394         if (rc) {
1395                 mlog(ML_ERROR, "Checksum failed for dinode %llu\n",
1396                      (unsigned long long)bh->b_blocknr);
1397                 goto bail;
1398         }
1399 
1400         /*
1401          * Errors after here are fatal.
1402          */
1403 
1404         rc = -EINVAL;
1405 
1406         if (!OCFS2_IS_VALID_DINODE(di)) {
1407                 rc = ocfs2_error(sb, "Invalid dinode #%llu: signature = %.*s\n",
1408                                  (unsigned long long)bh->b_blocknr, 7,
1409                                  di->i_signature);
1410                 goto bail;
1411         }
1412 
1413         if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1414                 rc = ocfs2_error(sb, "Invalid dinode #%llu: i_blkno is %llu\n",
1415                                  (unsigned long long)bh->b_blocknr,
1416                                  (unsigned long long)le64_to_cpu(di->i_blkno));
1417                 goto bail;
1418         }
1419 
1420         if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1421                 rc = ocfs2_error(sb,
1422                                  "Invalid dinode #%llu: OCFS2_VALID_FL not set\n",
1423                                  (unsigned long long)bh->b_blocknr);
1424                 goto bail;
1425         }
1426 
1427         if (le32_to_cpu(di->i_fs_generation) !=
1428             OCFS2_SB(sb)->fs_generation) {
1429                 rc = ocfs2_error(sb,
1430                                  "Invalid dinode #%llu: fs_generation is %u\n",
1431                                  (unsigned long long)bh->b_blocknr,
1432                                  le32_to_cpu(di->i_fs_generation));
1433                 goto bail;
1434         }
1435 
1436         rc = 0;
1437 
1438 bail:
1439         return rc;
1440 }
1441 
1442 static int ocfs2_filecheck_validate_inode_block(struct super_block *sb,
1443                                                 struct buffer_head *bh)
1444 {
1445         int rc = 0;
1446         struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1447 
1448         trace_ocfs2_filecheck_validate_inode_block(
1449                 (unsigned long long)bh->b_blocknr);
1450 
1451         BUG_ON(!buffer_uptodate(bh));
1452 
1453         /*
1454          * Call ocfs2_validate_meta_ecc() first since it has ecc repair
1455          * function, but we should not return error immediately when ecc
1456          * validation fails, because the reason is quite likely the invalid
1457          * inode number inputed.
1458          */
1459         rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check);
1460         if (rc) {
1461                 mlog(ML_ERROR,
1462                      "Filecheck: checksum failed for dinode %llu\n",
1463                      (unsigned long long)bh->b_blocknr);
1464                 rc = -OCFS2_FILECHECK_ERR_BLOCKECC;
1465         }
1466 
1467         if (!OCFS2_IS_VALID_DINODE(di)) {
1468                 mlog(ML_ERROR,
1469                      "Filecheck: invalid dinode #%llu: signature = %.*s\n",
1470                      (unsigned long long)bh->b_blocknr, 7, di->i_signature);
1471                 rc = -OCFS2_FILECHECK_ERR_INVALIDINO;
1472                 goto bail;
1473         } else if (rc)
1474                 goto bail;
1475 
1476         if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1477                 mlog(ML_ERROR,
1478                      "Filecheck: invalid dinode #%llu: i_blkno is %llu\n",
1479                      (unsigned long long)bh->b_blocknr,
1480                      (unsigned long long)le64_to_cpu(di->i_blkno));
1481                 rc = -OCFS2_FILECHECK_ERR_BLOCKNO;
1482                 goto bail;
1483         }
1484 
1485         if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1486                 mlog(ML_ERROR,
1487                      "Filecheck: invalid dinode #%llu: OCFS2_VALID_FL "
1488                      "not set\n",
1489                      (unsigned long long)bh->b_blocknr);
1490                 rc = -OCFS2_FILECHECK_ERR_VALIDFLAG;
1491                 goto bail;
1492         }
1493 
1494         if (le32_to_cpu(di->i_fs_generation) !=
1495             OCFS2_SB(sb)->fs_generation) {
1496                 mlog(ML_ERROR,
1497                      "Filecheck: invalid dinode #%llu: fs_generation is %u\n",
1498                      (unsigned long long)bh->b_blocknr,
1499                      le32_to_cpu(di->i_fs_generation));
1500                 rc = -OCFS2_FILECHECK_ERR_GENERATION;
1501                 goto bail;
1502         }
1503 
1504 bail:
1505         return rc;
1506 }
1507 
1508 static int ocfs2_filecheck_repair_inode_block(struct super_block *sb,
1509                                               struct buffer_head *bh)
1510 {
1511         int changed = 0;
1512         struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
1513 
1514         if (!ocfs2_filecheck_validate_inode_block(sb, bh))
1515                 return 0;
1516 
1517         trace_ocfs2_filecheck_repair_inode_block(
1518                 (unsigned long long)bh->b_blocknr);
1519 
1520         if (ocfs2_is_hard_readonly(OCFS2_SB(sb)) ||
1521             ocfs2_is_soft_readonly(OCFS2_SB(sb))) {
1522                 mlog(ML_ERROR,
1523                      "Filecheck: cannot repair dinode #%llu "
1524                      "on readonly filesystem\n",
1525                      (unsigned long long)bh->b_blocknr);
1526                 return -OCFS2_FILECHECK_ERR_READONLY;
1527         }
1528 
1529         if (buffer_jbd(bh)) {
1530                 mlog(ML_ERROR,
1531                      "Filecheck: cannot repair dinode #%llu, "
1532                      "its buffer is in jbd\n",
1533                      (unsigned long long)bh->b_blocknr);
1534                 return -OCFS2_FILECHECK_ERR_INJBD;
1535         }
1536 
1537         if (!OCFS2_IS_VALID_DINODE(di)) {
1538                 /* Cannot fix invalid inode block */
1539                 return -OCFS2_FILECHECK_ERR_INVALIDINO;
1540         }
1541 
1542         if (!(di->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
1543                 /* Cannot just add VALID_FL flag back as a fix,
1544                  * need more things to check here.
1545                  */
1546                 return -OCFS2_FILECHECK_ERR_VALIDFLAG;
1547         }
1548 
1549         if (le64_to_cpu(di->i_blkno) != bh->b_blocknr) {
1550                 di->i_blkno = cpu_to_le64(bh->b_blocknr);
1551                 changed = 1;
1552                 mlog(ML_ERROR,
1553                      "Filecheck: reset dinode #%llu: i_blkno to %llu\n",
1554                      (unsigned long long)bh->b_blocknr,
1555                      (unsigned long long)le64_to_cpu(di->i_blkno));
1556         }
1557 
1558         if (le32_to_cpu(di->i_fs_generation) !=
1559             OCFS2_SB(sb)->fs_generation) {
1560                 di->i_fs_generation = cpu_to_le32(OCFS2_SB(sb)->fs_generation);
1561                 changed = 1;
1562                 mlog(ML_ERROR,
1563                      "Filecheck: reset dinode #%llu: fs_generation to %u\n",
1564                      (unsigned long long)bh->b_blocknr,
1565                      le32_to_cpu(di->i_fs_generation));
1566         }
1567 
1568         if (changed || ocfs2_validate_meta_ecc(sb, bh->b_data, &di->i_check)) {
1569                 ocfs2_compute_meta_ecc(sb, bh->b_data, &di->i_check);
1570                 mark_buffer_dirty(bh);
1571                 mlog(ML_ERROR,
1572                      "Filecheck: reset dinode #%llu: compute meta ecc\n",
1573                      (unsigned long long)bh->b_blocknr);
1574         }
1575 
1576         return 0;
1577 }
1578 
1579 static int
1580 ocfs2_filecheck_read_inode_block_full(struct inode *inode,
1581                                       struct buffer_head **bh,
1582                                       int flags, int type)
1583 {
1584         int rc;
1585         struct buffer_head *tmp = *bh;
1586 
1587         if (!type) /* Check inode block */
1588                 rc = ocfs2_read_blocks(INODE_CACHE(inode),
1589                                 OCFS2_I(inode)->ip_blkno,
1590                                 1, &tmp, flags,
1591                                 ocfs2_filecheck_validate_inode_block);
1592         else /* Repair inode block */
1593                 rc = ocfs2_read_blocks(INODE_CACHE(inode),
1594                                 OCFS2_I(inode)->ip_blkno,
1595                                 1, &tmp, flags,
1596                                 ocfs2_filecheck_repair_inode_block);
1597 
1598         /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1599         if (!rc && !*bh)
1600                 *bh = tmp;
1601 
1602         return rc;
1603 }
1604 
1605 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
1606                                 int flags)
1607 {
1608         int rc;
1609         struct buffer_head *tmp = *bh;
1610 
1611         rc = ocfs2_read_blocks(INODE_CACHE(inode), OCFS2_I(inode)->ip_blkno,
1612                                1, &tmp, flags, ocfs2_validate_inode_block);
1613 
1614         /* If ocfs2_read_blocks() got us a new bh, pass it up. */
1615         if (!rc && !*bh)
1616                 *bh = tmp;
1617 
1618         return rc;
1619 }
1620 
1621 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh)
1622 {
1623         return ocfs2_read_inode_block_full(inode, bh, 0);
1624 }
1625 
1626 
1627 static u64 ocfs2_inode_cache_owner(struct ocfs2_caching_info *ci)
1628 {
1629         struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1630 
1631         return oi->ip_blkno;
1632 }
1633 
1634 static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info *ci)
1635 {
1636         struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1637 
1638         return oi->vfs_inode.i_sb;
1639 }
1640 
1641 static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
1642 {
1643         struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1644 
1645         spin_lock(&oi->ip_lock);
1646 }
1647 
1648 static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
1649 {
1650         struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1651 
1652         spin_unlock(&oi->ip_lock);
1653 }
1654 
1655 static void ocfs2_inode_cache_io_lock(struct ocfs2_caching_info *ci)
1656 {
1657         struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1658 
1659         mutex_lock(&oi->ip_io_mutex);
1660 }
1661 
1662 static void ocfs2_inode_cache_io_unlock(struct ocfs2_caching_info *ci)
1663 {
1664         struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
1665 
1666         mutex_unlock(&oi->ip_io_mutex);
1667 }
1668 
1669 const struct ocfs2_caching_operations ocfs2_inode_caching_ops = {
1670         .co_owner               = ocfs2_inode_cache_owner,
1671         .co_get_super           = ocfs2_inode_cache_get_super,
1672         .co_cache_lock          = ocfs2_inode_cache_lock,
1673         .co_cache_unlock        = ocfs2_inode_cache_unlock,
1674         .co_io_lock             = ocfs2_inode_cache_io_lock,
1675         .co_io_unlock           = ocfs2_inode_cache_io_unlock,
1676 };
1677 
1678 

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