Root/fs/ocfs2/inode.c

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

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