4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/lvfs/fsfilt_ext3.c
38 * Author: Andreas Dilger <adilger@clusterfs.com>
41 #define DEBUG_SUBSYSTEM S_FILTER
43 #include <linux/init.h>
44 #include <linux/module.h>
46 #include <linux/slab.h>
47 #include <linux/pagemap.h>
48 #include <linux/quotaops.h>
49 #ifdef HAVE_LINUX_EXPORTFS_H
50 #include <linux/exportfs.h>
52 #include <ext4/ext4.h>
53 #include <ext4/ext4_jbd2.h>
54 #include <linux/version.h>
55 #include <linux/bitops.h>
56 #include <linux/quota.h>
58 #if defined(HAVE_EXT3_XATTR_H)
59 # include <ext3/xattr.h>
60 #elif !defined(EXT3_XATTR_INDEX_TRUSTED)
61 /* ext3 xattr.h not available in rh style kernel-devel rpm */
62 /* CHAOS kernel-devel package will not include fs/ldiskfs/xattr.h */
63 # define EXT3_XATTR_INDEX_TRUSTED 4
64 extern int ext3_xattr_get(struct inode *, int, const char *, void *, size_t);
65 extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
68 #include <libcfs/libcfs.h>
69 #include <lustre_fsfilt.h>
71 #include <linux/lustre_compat25.h>
72 #include <linux/lprocfs_status.h>
74 #include <ext4/ext4_extents.h>
76 /* for kernels 2.6.18 and later */
77 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS(sb)
79 #define fsfilt_ext3_ext_insert_extent(handle, inode, path, newext, flag) \
80 ext3_ext_insert_extent(handle, inode, path, newext, flag)
82 #define ext3_mb_discard_inode_preallocations(inode) \
83 ext3_discard_preallocations(inode)
85 #define fsfilt_log_start_commit(journal, tid) jbd2_log_start_commit(journal, tid)
86 #define fsfilt_log_wait_commit(journal, tid) jbd2_log_wait_commit(journal, tid)
88 #ifdef HAVE_EXT4_JOURNAL_CALLBACK_ADD
89 # define journal_callback ext4_journal_cb_entry
90 # define fsfilt_journal_callback_set(handle, func, jcb) \
91 ext4_journal_callback_add(handle, func, jcb)
92 #elif defined(HAVE_JBD2_JOURNAL_CALLBACK_SET)
93 # define fsfilt_journal_callback_set(handle, func, jcb) \
94 jbd2_journal_callback_set(handle, func, jcb)
96 # error missing journal commit callback
97 #endif /* HAVE_EXT4_JOURNAL_CALLBACK_ADD */
99 static cfs_mem_cache_t *fcb_cache;
101 struct fsfilt_cb_data {
102 struct journal_callback cb_jcb; /* jbd private data - MUST BE FIRST */
103 fsfilt_cb_t cb_func; /* MDS/OBD completion function */
104 struct obd_device *cb_obd; /* MDS/OBD completion device */
105 __u64 cb_last_rcvd; /* MDS/OST last committed operation */
106 void *cb_data; /* MDS/OST completion function data */
109 #ifndef ext3_find_next_bit
110 #define ext3_find_next_bit ext2_find_next_bit
113 #ifndef ext2_find_next_bit
114 #ifdef __LITTLE_ENDIAN
115 #define ext2_find_next_bit(addr, size, off) find_next_bit((unsigned long *)(addr), (size), (off))
117 error "Need implementation of find_next_bit on big-endian systems"
118 #endif /* __LITTLE_ENDIAN */
119 #endif /* !ext2_find_next_le_bit */
121 static char *fsfilt_ext3_get_label(struct super_block *sb)
123 return EXT3_SB(sb)->s_es->s_volume_name;
126 static int fsfilt_ext3_set_label(struct super_block *sb, char *label)
128 /* see e.g. fsfilt_ext3_write_record() */
133 journal = EXT3_SB(sb)->s_journal;
134 handle = ext3_journal_start_sb(sb, 1);
135 if (IS_ERR(handle)) {
136 CERROR("can't start transaction\n");
137 return(PTR_ERR(handle));
140 err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
144 memcpy(EXT3_SB(sb)->s_es->s_volume_name, label,
145 sizeof(EXT3_SB(sb)->s_es->s_volume_name));
147 err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
150 ext3_journal_stop(handle);
155 static char *fsfilt_ext3_uuid(struct super_block *sb)
157 return EXT3_SB(sb)->s_es->s_uuid;
160 #ifdef HAVE_DISK_INODE_VERSION
162 static __u64 get_i_version(struct inode *inode)
164 return EXT3_I(inode)->i_fs_version;
167 static void set_i_version(struct inode *inode, __u64 new_version)
169 (EXT3_I(inode))->i_fs_version = new_version;
173 * Get the 64-bit version for an inode.
175 static __u64 fsfilt_ext3_get_version(struct inode *inode)
177 CDEBUG(D_INFO, "Get version "LPX64" for inode %lu\n",
178 get_i_version(inode), inode->i_ino);
179 return get_i_version(inode);
183 * Set the 64-bit version and return the old version.
185 static __u64 fsfilt_ext3_set_version(struct inode *inode, __u64 new_version)
187 __u64 old_version = get_i_version(inode);
189 CDEBUG(D_INFO, "Set version "LPX64" (old "LPX64") for inode %lu\n",
190 new_version, old_version, inode->i_ino);
191 set_i_version(inode, new_version);
192 /* version is set after all inode operations are finished, so we should
193 * mark it dirty here */
194 inode->i_sb->s_op->dirty_inode(inode);
200 /* kernel has ext4_blocks_for_truncate since linux-3.1.1 */
201 #ifdef HAVE_BLOCKS_FOR_TRUNCATE
202 # include <ext4/truncate.h>
204 static inline unsigned long ext4_blocks_for_truncate(struct inode *inode)
208 needed = inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9);
211 if (needed > EXT4_MAX_TRANS_DATA)
212 needed = EXT4_MAX_TRANS_DATA;
213 return EXT4_DATA_TRANS_BLOCKS(inode->i_sb) + needed;
218 * We don't currently need any additional blocks for rmdir and
219 * unlink transactions because we are storing the OST oa_id inside
220 * the inode (which we will be changing anyways as part of this
223 static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
226 /* For updates to the last received file */
227 int nblocks = FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
231 if (current->journal_info) {
232 CDEBUG(D_INODE, "increasing refcount on %p\n",
233 current->journal_info);
238 case FSFILT_OP_RMDIR:
239 case FSFILT_OP_UNLINK:
240 /* delete one file + create/update logs for each stripe */
241 nblocks += EXT3_DELETE_TRANS_BLOCKS(inode->i_sb);
242 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
243 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
245 case FSFILT_OP_RENAME:
246 /* modify additional directory */
247 nblocks += FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
249 case FSFILT_OP_SYMLINK:
250 /* additional block + block bitmap + GDT for long symlink */
253 case FSFILT_OP_CREATE: {
256 case FSFILT_OP_MKDIR:
257 case FSFILT_OP_MKNOD:
258 /* modify one inode + block bitmap + GDT */
262 /* modify parent directory */
263 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
264 EXT3_DATA_TRANS_BLOCKS(inode->i_sb);
265 /* create/update logs for each stripe */
266 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
267 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
269 case FSFILT_OP_SETATTR:
270 /* Setattr on inode */
272 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
273 EXT3_DATA_TRANS_BLOCKS(inode->i_sb);
274 /* quota chown log for each stripe */
275 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
276 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
278 case FSFILT_OP_CANCEL_UNLINK:
281 /* blocks for log header bitmap update OR
282 * blocks for catalog header bitmap update + unlink of logs +
283 * blocks for delete the inode (include blocks truncating). */
284 nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
285 EXT3_DELETE_TRANS_BLOCKS(inode->i_sb) +
286 ext4_blocks_for_truncate(inode) + 3;
288 default: CERROR("unknown transaction start op %d\n", op);
292 LASSERT(current->journal_info == desc_private);
293 journal = EXT3_SB(inode->i_sb)->s_journal;
294 if (nblocks > journal->j_max_transaction_buffers) {
295 CWARN("too many credits %d for op %ux%u using %d instead\n",
296 nblocks, op, logs, journal->j_max_transaction_buffers);
297 nblocks = journal->j_max_transaction_buffers;
301 LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
302 handle = ext3_journal_start(inode, nblocks);
305 LASSERT(current->journal_info == handle);
307 CERROR("error starting handle for op %u (%u credits): rc %ld\n",
308 op, nblocks, PTR_ERR(handle));
313 * Calculate the number of buffer credits needed to write multiple pages in
314 * a single ext3 transaction. No, this shouldn't be here, but as yet ext3
315 * doesn't have a nice API for calculating this sort of thing in advance.
317 * See comment above ext3_writepage_trans_blocks for details. We assume
318 * no data journaling is being done, but it does allow for all of the pages
319 * being non-contiguous. If we are guaranteed contiguous pages we could
320 * reduce the number of (d)indirect blocks a lot.
322 * With N blocks per page and P pages, for each inode we have at most:
324 * min(N*P, blocksize/4 + 1) dindirect blocks
327 * For the entire filesystem, we have at most:
328 * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
329 * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
330 * objcount inode blocks
332 * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
334 * 1 EXT3_DATA_TRANS_BLOCKS for the last_rcvd update.
336 static int fsfilt_ext3_credits_needed(int objcount, struct fsfilt_objinfo *fso,
337 int niocount, struct niobuf_local *nb)
339 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
341 const int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
342 int nbitmaps = 0, ngdblocks;
343 int needed = objcount + 1; /* inodes + superblock */
346 for (i = 0, j = 0; i < objcount; i++, fso++) {
347 /* two or more dindirect blocks in case we cross boundary */
349 (long)((nb[j + fso->fso_bufcnt - 1].lnb_file_offset -
350 nb[j].lnb_file_offset) >>
351 sb->s_blocksize_bits) /
352 (EXT3_ADDR_PER_BLOCK(sb) * EXT3_ADDR_PER_BLOCK(sb));
353 nbitmaps += min(fso->fso_bufcnt, ndind > 0 ? ndind : 2);
355 /* leaf, indirect, tindirect blocks for first block */
356 nbitmaps += blockpp + 2;
358 j += fso->fso_bufcnt;
361 next_indir = nb[0].lnb_file_offset +
362 (EXT3_ADDR_PER_BLOCK(sb) << sb->s_blocksize_bits);
363 for (i = 1; i < niocount; i++) {
364 if (nb[i].lnb_file_offset >= next_indir) {
365 nbitmaps++; /* additional indirect */
366 next_indir = nb[i].lnb_file_offset +
367 (EXT3_ADDR_PER_BLOCK(sb) <<
368 sb->s_blocksize_bits);
369 } else if (nb[i].lnb_file_offset !=
370 nb[i - 1].lnb_file_offset + sb->s_blocksize) {
371 nbitmaps++; /* additional indirect */
373 nbitmaps += blockpp; /* each leaf in different group? */
376 ngdblocks = nbitmaps;
377 if (nbitmaps > EXT3_SB(sb)->s_groups_count)
378 nbitmaps = EXT3_SB(sb)->s_groups_count;
379 if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
380 ngdblocks = EXT3_SB(sb)->s_gdb_count;
382 needed += nbitmaps + ngdblocks;
384 /* last_rcvd update */
385 needed += EXT3_DATA_TRANS_BLOCKS(sb);
387 #if defined(CONFIG_QUOTA)
388 /* We assume that there will be 1 bit set in s_dquot.flags for each
389 * quota file that is active. This is at least true for now.
391 needed += hweight32(sb_any_quota_loaded(sb)) *
392 FSFILT_SINGLEDATA_TRANS_BLOCKS(sb);
398 /* We have to start a huge journal transaction here to hold all of the
399 * metadata for the pages being written here. This is necessitated by
400 * the fact that we do lots of prepare_write operations before we do
401 * any of the matching commit_write operations, so even if we split
402 * up to use "smaller" transactions none of them could complete until
403 * all of them were opened. By having a single journal transaction,
404 * we eliminate duplicate reservations for common blocks like the
405 * superblock and group descriptors or bitmaps.
407 * We will start the transaction here, but each prepare_write will
408 * add a refcount to the transaction, and each commit_write will
409 * remove a refcount. The transaction will be closed when all of
410 * the pages have been written.
412 static void *fsfilt_ext3_brw_start(int objcount, struct fsfilt_objinfo *fso,
413 int niocount, struct niobuf_local *nb,
414 void *desc_private, int logs)
421 LASSERT(current->journal_info == desc_private);
422 journal = EXT3_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
423 needed = fsfilt_ext3_credits_needed(objcount, fso, niocount, nb);
425 /* The number of blocks we could _possibly_ dirty can very large.
426 * We reduce our request if it is absurd (and we couldn't get that
427 * many credits for a single handle anyways).
429 * At some point we have to limit the size of I/Os sent at one time,
430 * increase the size of the journal, or we have to calculate the
431 * actual journal requirements more carefully by checking all of
432 * the blocks instead of being maximally pessimistic. It remains to
433 * be seen if this is a real problem or not.
435 if (needed > journal->j_max_transaction_buffers) {
436 CERROR("want too many journal credits (%d) using %d instead\n",
437 needed, journal->j_max_transaction_buffers);
438 needed = journal->j_max_transaction_buffers;
441 LASSERTF(needed > 0, "can't start %d credit transaction\n", needed);
442 handle = ext3_journal_start(fso->fso_dentry->d_inode, needed);
443 if (IS_ERR(handle)) {
444 CERROR("can't get handle for %d credits: rc = %ld\n", needed,
447 LASSERT(handle->h_buffer_credits >= needed);
448 LASSERT(current->journal_info == handle);
454 static int fsfilt_ext3_extend(struct inode *inode, unsigned int nblocks,void *h)
456 handle_t *handle = h;
458 /* fsfilt_extend called with nblocks = 0 for testing in special cases */
460 handle->h_buffer_credits = 0;
461 CWARN("setting credits of handle %p to zero by request\n", h);
464 if (handle->h_buffer_credits > nblocks)
466 if (ext3_journal_extend(handle, nblocks) == 0)
469 ext3_mark_inode_dirty(handle, inode);
470 return ext3_journal_restart(handle, nblocks);
473 static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
476 handle_t *handle = h;
478 LASSERT(current->journal_info == handle);
480 handle->h_sync = 1; /* recovery likes this */
482 rc = ext3_journal_stop(handle);
487 static int fsfilt_ext3_commit_async(struct inode *inode, void *h,
491 transaction_t *transaction;
492 handle_t *handle = h;
496 LASSERT(current->journal_info == handle);
498 transaction = handle->h_transaction;
499 journal = transaction->t_journal;
500 tid = transaction->t_tid;
501 /* we don't want to be blocked */
503 rc = ext3_journal_stop(handle);
505 CERROR("error while stopping transaction: %d\n", rc);
508 fsfilt_log_start_commit(journal, tid);
510 *wait_handle = (void *) tid;
511 CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid);
515 static int fsfilt_ext3_commit_wait(struct inode *inode, void *h)
517 journal_t *journal = EXT3_JOURNAL(inode);
518 tid_t tid = (tid_t)(long)h;
520 CDEBUG(D_INODE, "commit wait: %lu\n", (unsigned long) tid);
521 if (unlikely(is_journal_aborted(journal)))
524 fsfilt_log_wait_commit(EXT3_JOURNAL(inode), tid);
526 if (unlikely(is_journal_aborted(journal)))
531 static int fsfilt_ext3_setattr(struct dentry *dentry, void *handle,
532 struct iattr *iattr, int do_trunc)
534 struct inode *inode = dentry->d_inode;
537 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0)
538 /* Try to correct for a bug in 2.1.0 (LU-221) that caused negative
539 * timestamps to appear to be in the far future, due old timestamp
540 * being stored on disk as an unsigned value. This fixes up any
541 * bad values held by the client before storing them on disk,
542 * and ensures any timestamp updates are correct. LU-1042 */
543 if (unlikely(LTIME_S(inode->i_atime) == LU221_BAD_TIME &&
544 !(iattr->ia_valid & ATTR_ATIME))) {
545 iattr->ia_valid |= ATTR_ATIME;
546 LTIME_S(iattr->ia_atime) = 0;
548 if (unlikely(LTIME_S(inode->i_mtime) == LU221_BAD_TIME &&
549 !(iattr->ia_valid & ATTR_MTIME))) {
550 iattr->ia_valid |= ATTR_MTIME;
551 LTIME_S(iattr->ia_mtime) = 0;
553 if (unlikely((LTIME_S(inode->i_ctime) == LU221_BAD_TIME ||
554 LTIME_S(inode->i_ctime) == 0) &&
555 !(iattr->ia_valid & ATTR_CTIME))) {
556 iattr->ia_valid |= ATTR_CTIME;
557 LTIME_S(iattr->ia_ctime) = 0;
560 #warning "remove old LU-221/LU-1042 workaround code"
563 /* When initializating timestamps for new inodes, use the filesystem
564 * mkfs time for ctime to avoid e2fsck ibadness incorrectly thinking
565 * that this is potentially an invalid inode. Files with an old ctime
566 * migrated to a newly-formatted OST with a newer s_mkfs_time will not
567 * hit this check, since it is only for ctime == 0. LU-1010/LU-1042 */
568 if ((iattr->ia_valid & ATTR_CTIME) && LTIME_S(iattr->ia_ctime) == 0)
569 LTIME_S(iattr->ia_ctime) =
570 EXT4_SB(inode->i_sb)->s_es->s_mkfs_time;
572 /* Avoid marking the inode dirty on the superblock list unnecessarily.
573 * We are already writing the inode to disk as part of this
574 * transaction and want to avoid a lot of extra inode writeout
575 * later on. b=9828 */
576 if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
577 /* ATTR_SIZE would invoke truncate: clear it */
578 iattr->ia_valid &= ~ATTR_SIZE;
579 EXT3_I(inode)->i_disksize = iattr->ia_size;
580 i_size_write(inode, iattr->ia_size);
582 if (iattr->ia_valid & ATTR_UID)
583 inode->i_uid = iattr->ia_uid;
584 if (iattr->ia_valid & ATTR_GID)
585 inode->i_gid = iattr->ia_gid;
586 if (iattr->ia_valid & ATTR_ATIME)
587 inode->i_atime = iattr->ia_atime;
588 if (iattr->ia_valid & ATTR_MTIME)
589 inode->i_mtime = iattr->ia_mtime;
590 if (iattr->ia_valid & ATTR_CTIME)
591 inode->i_ctime = iattr->ia_ctime;
592 if (iattr->ia_valid & ATTR_MODE) {
593 inode->i_mode = iattr->ia_mode;
595 if (!cfs_curproc_is_in_groups(inode->i_gid) &&
596 !cfs_capable(CFS_CAP_FSETID))
597 inode->i_mode &= ~S_ISGID;
600 inode->i_sb->s_op->dirty_inode(inode);
605 /* Don't allow setattr to change file type */
606 if (iattr->ia_valid & ATTR_MODE)
607 iattr->ia_mode = (inode->i_mode & S_IFMT) |
608 (iattr->ia_mode & ~S_IFMT);
610 /* We set these flags on the client, but have already checked perms
611 * so don't confuse inode_change_ok. */
612 iattr->ia_valid &= ~TIMES_SET_FLAGS;
614 if (inode->i_op->setattr) {
615 rc = inode->i_op->setattr(dentry, iattr);
617 #ifndef HAVE_SIMPLE_SETATTR /* simple_setattr() already call it */
618 rc = inode_change_ok(inode, iattr);
621 rc = simple_setattr(dentry, iattr);
628 static int fsfilt_ext3_iocontrol(struct inode *inode, struct file *file,
629 unsigned int cmd, unsigned long arg)
634 /* FIXME: Can't do this because of nested transaction deadlock */
635 if (cmd == EXT3_IOC_SETFLAGS) {
636 /* We can't enable data journaling on OST objects, because
637 * this forces the transaction to be closed in order to
638 * flush the journal, but the caller will already have a
639 * compound transaction open to update the last_rcvd file,
640 * and this thread would deadlock trying to set the flag. */
641 if ((*(int *)arg) & EXT3_JOURNAL_DATA_FL) {
642 CERROR("can't set data journal flag on file\n");
645 /* Because the MDS does not see the EXTENTS_FL set on the
646 * OST objects, mask this flag into all set flags. It is
647 * not legal to clear this flag in any case, so we are not
648 * changing the functionality by doing this. b=22911 */
649 *(int *)arg |= EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL;
652 /* ext4_ioctl does not have a inode argument */
653 if (inode->i_fop->unlocked_ioctl)
654 rc = inode->i_fop->unlocked_ioctl(file, cmd, arg);
661 static int fsfilt_ext3_set_md(struct inode *inode, void *handle,
662 void *lmm, int lmm_size, const char *name)
666 LASSERT(mutex_trylock(&inode->i_mutex) == 0);
668 rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_TRUSTED,
669 name, lmm, lmm_size, XATTR_NO_CTIME);
671 if (rc && rc != -EROFS)
672 CERROR("error adding MD data to inode %lu: rc = %d\n",
677 /* Must be called with i_mutex held */
678 static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size,
683 LASSERT(mutex_trylock(&inode->i_mutex) == 0);
685 rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED,
686 name, lmm, lmm_size);
688 /* This gives us the MD size */
690 return (rc == -ENODATA) ? 0 : rc;
693 CDEBUG(D_INFO, "error getting EA %d/%s from inode %lu: rc %d\n",
694 EXT3_XATTR_INDEX_TRUSTED, name,
696 memset(lmm, 0, lmm_size);
697 return (rc == -ENODATA) ? 0 : rc;
703 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct bio *bio)
709 static ssize_t fsfilt_ext3_readpage(struct file *file, char *buf, size_t count,
712 struct inode *inode = file->f_dentry->d_inode;
715 if (S_ISREG(inode->i_mode))
716 rc = file->f_op->read(file, buf, count, off);
718 const int blkbits = inode->i_sb->s_blocksize_bits;
719 const int blksize = inode->i_sb->s_blocksize;
721 CDEBUG(D_EXT2, "reading %lu at dir %lu+%llu\n",
722 (unsigned long)count, inode->i_ino, *off);
724 struct buffer_head *bh;
727 if (*off < i_size_read(inode)) {
730 bh = ext3_bread(NULL, inode, *off >> blkbits,
733 CDEBUG(D_EXT2, "read %u@%llu\n", blksize, *off);
736 memcpy(buf, bh->b_data, blksize);
739 /* XXX in theory we should just fake
740 * this buffer and continue like ext3,
741 * especially if this is a partial read
743 CERROR("error read dir %lu+%llu: %d\n",
744 inode->i_ino, *off, err);
749 struct ext3_dir_entry_2 *fake = (void *)buf;
751 CDEBUG(D_EXT2, "fake %u@%llu\n", blksize, *off);
752 memset(fake, 0, sizeof(*fake));
753 fake->rec_len = cpu_to_le16(blksize);
765 #ifdef HAVE_EXT4_JOURNAL_CALLBACK_ADD
766 static void fsfilt_ext3_cb_func(struct super_block *sb,
767 struct journal_callback *jcb, int error)
769 static void fsfilt_ext3_cb_func(struct journal_callback *jcb, int error)
772 struct fsfilt_cb_data *fcb = container_of(jcb, typeof(*fcb), cb_jcb);
774 fcb->cb_func(fcb->cb_obd, fcb->cb_last_rcvd, fcb->cb_data, error);
776 OBD_SLAB_FREE(fcb, fcb_cache, sizeof *fcb);
779 static int fsfilt_ext3_add_journal_cb(struct obd_device *obd, __u64 last_rcvd,
780 void *handle, fsfilt_cb_t cb_func,
783 struct fsfilt_cb_data *fcb;
785 OBD_SLAB_ALLOC_PTR_GFP(fcb, fcb_cache, CFS_ALLOC_IO);
789 fcb->cb_func = cb_func;
791 fcb->cb_last_rcvd = last_rcvd;
792 fcb->cb_data = cb_data;
794 CDEBUG(D_EXT2, "set callback for last_rcvd: "LPD64"\n", last_rcvd);
795 fsfilt_journal_callback_set(handle, fsfilt_ext3_cb_func, &fcb->cb_jcb);
800 static int fsfilt_ext3_statfs(struct super_block *sb, struct obd_statfs *osfs)
805 memset(&sfs, 0, sizeof(sfs));
806 rc = sb->s_op->statfs(sb->s_root, &sfs);
807 statfs_pack(osfs, &sfs);
811 static int fsfilt_ext3_sync(struct super_block *sb)
813 return ext3_force_commit(sb);
816 #ifndef EXT3_EXTENTS_FL
817 #define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */
821 #define EXT_ASSERT(cond) BUG_ON(!(cond))
824 #define EXT_GENERATION(inode) (EXT4_I(inode)->i_ext_generation)
825 #define ext3_ext_base inode
826 #define ext3_ext_base2inode(inode) (inode)
827 #define EXT_DEPTH(inode) ext_depth(inode)
828 #define fsfilt_ext3_ext_walk_space(inode, block, num, cb, cbdata) \
829 ext3_ext_walk_space(inode, block, num, cb, cbdata);
832 unsigned long *blocks;
840 static long ext3_ext_find_goal(struct inode *inode, struct ext3_ext_path *path,
841 unsigned long block, int *aflags)
843 struct ext3_inode_info *ei = EXT3_I(inode);
844 unsigned long bg_start;
845 unsigned long colour;
849 struct ext3_extent *ex;
850 depth = path->p_depth;
852 /* try to predict block placement */
853 if ((ex = path[depth].p_ext))
854 return ext_pblock(ex) + (block - le32_to_cpu(ex->ee_block));
856 /* it looks index is empty
857 * try to find starting from index itself */
858 if (path[depth].p_bh)
859 return path[depth].p_bh->b_blocknr;
862 /* OK. use inode's group */
863 bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
864 le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
865 colour = (current->pid % 16) *
866 (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
867 return bg_start + colour + block;
870 #define ll_unmap_underlying_metadata(sb, blocknr) \
871 unmap_underlying_metadata((sb)->s_bdev, blocknr)
873 #ifndef EXT3_MB_HINT_GROUP_ALLOC
874 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
875 struct ext3_ext_path *path, unsigned long block,
876 unsigned long *count, int *err)
878 unsigned long pblock, goal;
880 struct inode *inode = ext3_ext_base2inode(base);
882 goal = ext3_ext_find_goal(inode, path, block, &aflags);
883 aflags |= 2; /* block have been already reserved */
884 pblock = ext3_mb_new_blocks(handle, inode, goal, count, aflags, err);
889 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
890 struct ext3_ext_path *path, unsigned long block,
891 unsigned long *count, int *err)
893 struct inode *inode = ext3_ext_base2inode(base);
894 struct ext3_allocation_request ar;
895 unsigned long pblock;
898 /* find neighbour allocated blocks */
900 *err = ext3_ext_search_left(base, path, &ar.lleft, &ar.pleft);
904 *err = ext3_ext_search_right(base, path, &ar.lright, &ar.pright);
908 /* allocate new block */
909 ar.goal = ext3_ext_find_goal(inode, path, block, &aflags);
913 ar.flags = EXT3_MB_HINT_DATA;
914 pblock = ext3_mb_new_blocks(handle, &ar, err);
920 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
921 struct ext3_ext_path *path,
922 struct ext3_ext_cache *cex,
923 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
924 struct ext3_extent *ex,
928 struct bpointers *bp = cbdata;
929 struct inode *inode = ext3_ext_base2inode(base);
930 struct ext3_extent nex;
931 unsigned long pblock;
937 if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
942 if (bp->create == 0) {
944 if (cex->ec_block < bp->start)
945 i = bp->start - cex->ec_block;
946 if (i >= cex->ec_len)
947 CERROR("nothing to do?! i = %d, e_num = %u\n",
949 for (; i < cex->ec_len && bp->num; i++) {
961 tgen = EXT_GENERATION(base);
962 count = ext3_ext_calc_credits_for_insert(base, path);
964 handle = ext3_journal_start(inode, count+EXT3_ALLOC_NEEDED+1);
965 if (IS_ERR(handle)) {
966 return PTR_ERR(handle);
969 if (tgen != EXT_GENERATION(base)) {
970 /* the tree has changed. so path can be invalid at moment */
971 ext3_journal_stop(handle);
975 /* In 2.6.32 kernel, ext4_ext_walk_space()'s callback func is not
976 * protected by i_data_sem as whole. so we patch it to store
977 * generation to path and now verify the tree hasn't changed */
978 down_write((&EXT4_I(inode)->i_data_sem));
980 /* validate extent, make sure the extent tree does not changed */
981 if (EXT_GENERATION(base) != path[0].p_generation) {
982 /* cex is invalid, try again */
983 up_write(&EXT4_I(inode)->i_data_sem);
984 ext3_journal_stop(handle);
989 pblock = new_blocks(handle, base, path, cex->ec_block, &count, &err);
992 EXT_ASSERT(count <= cex->ec_len);
994 /* insert new extent */
995 nex.ee_block = cpu_to_le32(cex->ec_block);
996 ext3_ext_store_pblock(&nex, pblock);
997 nex.ee_len = cpu_to_le16(count);
998 err = fsfilt_ext3_ext_insert_extent(handle, base, path, &nex, 0);
1000 /* free data blocks we just allocated */
1001 /* not a good idea to call discard here directly,
1002 * but otherwise we'd need to call it every free() */
1003 #ifdef EXT3_MB_HINT_GROUP_ALLOC
1004 ext3_mb_discard_inode_preallocations(inode);
1006 ext3_free_blocks(handle, inode, ext_pblock(&nex),
1007 cpu_to_le16(nex.ee_len), 0);
1012 * Putting len of the actual extent we just inserted,
1013 * we are asking ext3_ext_walk_space() to continue
1014 * scaning after that block
1016 cex->ec_len = le16_to_cpu(nex.ee_len);
1017 cex->ec_start = ext_pblock(&nex);
1018 BUG_ON(le16_to_cpu(nex.ee_len) == 0);
1019 BUG_ON(le32_to_cpu(nex.ee_block) != cex->ec_block);
1022 up_write((&EXT4_I(inode)->i_data_sem));
1023 ext3_journal_stop(handle);
1028 CERROR("hmm. why do we find this extent?\n");
1029 CERROR("initial space: %lu:%u\n",
1030 bp->start, bp->init_num);
1031 CERROR("current extent: %u/%u/%llu %d\n",
1032 cex->ec_block, cex->ec_len,
1033 (unsigned long long)cex->ec_start,
1037 if (cex->ec_block < bp->start)
1038 i = bp->start - cex->ec_block;
1039 if (i >= cex->ec_len)
1040 CERROR("nothing to do?! i = %d, e_num = %u\n",
1042 for (; i < cex->ec_len && bp->num; i++) {
1043 *(bp->blocks) = cex->ec_start + i;
1044 if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
1048 /* unmap any possible underlying metadata from
1049 * the block device mapping. bug 6998. */
1050 ll_unmap_underlying_metadata(inode->i_sb,
1062 int fsfilt_map_nblocks(struct inode *inode, unsigned long block,
1063 unsigned long num, unsigned long *blocks,
1064 int *created, int create)
1066 struct ext3_ext_base *base = inode;
1067 struct bpointers bp;
1070 CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
1071 block, block + num - 1, (unsigned) inode->i_ino);
1074 bp.created = created;
1076 bp.init_num = bp.num = num;
1079 err = fsfilt_ext3_ext_walk_space(base, block, num,
1080 ext3_ext_new_extent_cb, &bp);
1081 ext3_ext_invalidate_cache(base);
1086 int fsfilt_ext3_map_ext_inode_pages(struct inode *inode, struct page **page,
1087 int pages, unsigned long *blocks,
1088 int *created, int create)
1090 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1092 struct page *fp = NULL;
1095 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
1096 inode->i_ino, pages, (*page)->index);
1098 /* pages are sorted already. so, we just have to find
1099 * contig. space and process them properly */
1102 /* start new extent */
1107 } else if (fp->index + clen == (*page)->index) {
1108 /* continue the extent */
1115 /* process found extent */
1116 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1117 clen * blocks_per_page, blocks,
1122 /* look for next extent */
1124 blocks += blocks_per_page * clen;
1125 created += blocks_per_page * clen;
1129 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1130 clen * blocks_per_page, blocks,
1136 extern int ext3_map_inode_page(struct inode *inode, struct page *page,
1137 unsigned long *blocks, int *created, int create);
1138 int fsfilt_ext3_map_bm_inode_pages(struct inode *inode, struct page **page,
1139 int pages, unsigned long *blocks,
1140 int *created, int create)
1142 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1146 for (i = 0, cr = created, b = blocks; i < pages; i++, page++) {
1147 rc = ext3_map_inode_page(inode, *page, b, cr, create);
1149 CERROR("ino %lu, blk %lu cr %u create %d: rc %d\n",
1150 inode->i_ino, *b, *cr, create, rc);
1154 b += blocks_per_page;
1155 cr += blocks_per_page;
1160 int fsfilt_ext3_map_inode_pages(struct inode *inode, struct page **page,
1161 int pages, unsigned long *blocks,
1162 int *created, int create,
1163 struct mutex *optional_mutex)
1167 if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL) {
1168 rc = fsfilt_ext3_map_ext_inode_pages(inode, page, pages,
1169 blocks, created, create);
1172 if (optional_mutex != NULL)
1173 mutex_lock(optional_mutex);
1174 rc = fsfilt_ext3_map_bm_inode_pages(inode, page, pages, blocks,
1176 if (optional_mutex != NULL)
1177 mutex_unlock(optional_mutex);
1182 int fsfilt_ext3_read(struct inode *inode, void *buf, int size, loff_t *offs)
1184 unsigned long block;
1185 struct buffer_head *bh;
1186 int err, blocksize, csize, boffs, osize = size;
1188 /* prevent reading after eof */
1189 spin_lock(&inode->i_lock);
1190 if (i_size_read(inode) < *offs + size) {
1191 size = i_size_read(inode) - *offs;
1192 spin_unlock(&inode->i_lock);
1194 CDEBUG(D_EXT2, "size %llu is too short for read @%llu\n",
1195 i_size_read(inode), *offs);
1197 } else if (size == 0) {
1201 spin_unlock(&inode->i_lock);
1204 blocksize = 1 << inode->i_blkbits;
1207 block = *offs >> inode->i_blkbits;
1208 boffs = *offs & (blocksize - 1);
1209 csize = min(blocksize - boffs, size);
1210 bh = ext3_bread(NULL, inode, block, 0, &err);
1212 CERROR("can't read block: %d\n", err);
1216 memcpy(buf, bh->b_data + boffs, csize);
1225 EXPORT_SYMBOL(fsfilt_ext3_read);
1227 static int fsfilt_ext3_read_record(struct file * file, void *buf,
1228 int size, loff_t *offs)
1231 rc = fsfilt_ext3_read(file->f_dentry->d_inode, buf, size, offs);
1237 int fsfilt_ext3_write_handle(struct inode *inode, void *buf, int bufsize,
1238 loff_t *offs, handle_t *handle)
1240 struct buffer_head *bh = NULL;
1241 loff_t old_size = i_size_read(inode), offset = *offs;
1242 loff_t new_size = i_size_read(inode);
1243 unsigned long block;
1244 int err = 0, blocksize = 1 << inode->i_blkbits, size, boffs;
1246 while (bufsize > 0) {
1250 block = offset >> inode->i_blkbits;
1251 boffs = offset & (blocksize - 1);
1252 size = min(blocksize - boffs, bufsize);
1253 bh = ext3_bread(handle, inode, block, 1, &err);
1255 CERROR("can't read/create block: %d\n", err);
1259 err = ext3_journal_get_write_access(handle, bh);
1261 CERROR("journal_get_write_access() returned error %d\n",
1265 LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
1266 memcpy(bh->b_data + boffs, buf, size);
1267 err = ext3_journal_dirty_metadata(handle, bh);
1269 CERROR("journal_dirty_metadata() returned error %d\n",
1273 if (offset + size > new_size)
1274 new_size = offset + size;
1282 /* correct in-core and on-disk sizes */
1283 if (new_size > i_size_read(inode)) {
1284 spin_lock(&inode->i_lock);
1285 if (new_size > i_size_read(inode))
1286 i_size_write(inode, new_size);
1287 if (i_size_read(inode) > EXT3_I(inode)->i_disksize)
1288 EXT3_I(inode)->i_disksize = i_size_read(inode);
1289 if (i_size_read(inode) > old_size) {
1290 spin_unlock(&inode->i_lock);
1291 mark_inode_dirty(inode);
1293 spin_unlock(&inode->i_lock);
1301 EXPORT_SYMBOL(fsfilt_ext3_write_handle);
1303 static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
1304 loff_t *offs, int force_sync)
1306 struct inode *inode = file->f_dentry->d_inode;
1308 int err, block_count = 0, blocksize;
1310 /* Determine how many transaction credits are needed */
1311 blocksize = 1 << inode->i_blkbits;
1312 block_count = (*offs & (blocksize - 1)) + bufsize;
1313 block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
1315 handle = ext3_journal_start(inode,
1316 block_count * EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
1317 if (IS_ERR(handle)) {
1318 CERROR("can't start transaction for %d blocks (%d bytes)\n",
1319 block_count * EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + 2,
1321 return PTR_ERR(handle);
1324 err = fsfilt_ext3_write_handle(inode, buf, bufsize, offs, handle);
1326 if (!err && force_sync)
1327 handle->h_sync = 1; /* recovery likes this */
1329 ext3_journal_stop(handle);
1334 static int fsfilt_ext3_setup(struct super_block *sb)
1336 if (!EXT3_HAS_COMPAT_FEATURE(sb,
1337 EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1338 CERROR("ext3 mounted without journal\n");
1343 CWARN("Enabling PDIROPS\n");
1344 set_opt(EXT3_SB(sb)->s_mount_opt, PDIROPS);
1345 sb->s_flags |= S_PDIROPS;
1347 if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
1348 CWARN("filesystem doesn't have dir_index feature enabled\n");
1352 /* If fso is NULL, op is FSFILT operation, otherwise op is number of fso
1353 objects. Logs is number of logfiles to update */
1354 static int fsfilt_ext3_get_op_len(int op, struct fsfilt_objinfo *fso, int logs)
1358 case FSFILT_OP_CREATE:
1359 /* directory leaf, index & indirect & EA*/
1360 return 4 + 3 * logs;
1361 case FSFILT_OP_UNLINK:
1367 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
1368 int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
1369 int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
1370 for (i = 0; i < op; i++, fso++) {
1371 int nblocks = fso->fso_bufcnt * blockpp;
1372 int ndindirect = min(nblocks, addrpp + 1);
1373 int nindir = nblocks + ndindirect + 1;
1377 return needed + 3 * logs;
1383 lvfs_sbdev_type fsfilt_ext3_journal_sbdev(struct super_block *sb)
1385 return (EXT3_SB(sb)->journal_bdev);
1387 EXPORT_SYMBOL(fsfilt_ext3_journal_sbdev);
1389 static int ll_decode_fh_accept(void *context, struct dentry *de)
1394 #ifdef HAVE_EXPORTFS_DECODE_FH
1395 # define ll_exportfs_decode_fh(mnt, fid, len, type, acceptable, context) \
1396 exportfs_decode_fh(mnt, (struct fid*)(fid), len, type, \
1397 acceptable, context)
1399 # define ll_exportfs_decode_fh(mnt, fid, len, type, acceptable, context) \
1400 export_op_default.decode_fh((mnt)->mnt_sb, &(fid)->ino, len, \
1401 type, acceptable, context)
1402 # define FILEID_INO32_GEN 1
1403 extern struct export_operations export_op_default;
1406 struct dentry *fsfilt_ext3_fid2dentry(struct vfsmount *mnt,
1407 struct fsfilt_fid *fid, int ignore_gen)
1409 struct inode *inode;
1410 struct dentry *result;
1412 result = ll_exportfs_decode_fh(mnt, fid, 2, FILEID_INO32_GEN,
1413 ll_decode_fh_accept, NULL);
1414 if (IS_ERR(result)) {
1415 CDEBUG(D_DENTRY, "%s of %u/%u failed %ld\n", __func__,
1416 fid->ino, fid->gen, PTR_ERR(result));
1420 CDEBUG(D_DENTRY, "%s of %u/%u succeeded\n", __func__,
1421 fid->ino, fid->gen);
1422 inode = result->d_inode;
1426 if (inode->i_nlink == 0 &&
1427 inode->i_mode == 0 && LTIME_S(inode->i_ctime) == 0) {
1428 LCONSOLE_WARN("Found inode with zero nlink, mode and"
1429 " ctime -- this may indicate disk "
1430 "corruption (inode: %lu, link: %lu, "
1431 "count: %d)\n", inode->i_ino,
1432 (unsigned long)inode->i_nlink,
1433 atomic_read(&inode->i_count));
1436 if (fid->gen && inode->i_generation != fid->gen) {
1437 /* we didn't find the right inode.. */
1438 CDEBUG(D_INODE, "found wrong generation: inode %lu, link: %lu, "
1439 "count: %d, generation %u/%u\n",
1440 inode->i_ino, (unsigned long)inode->i_nlink,
1441 atomic_read(&inode->i_count), inode->i_generation,
1449 return ERR_PTR(-ENOENT);
1452 static struct fsfilt_operations fsfilt_ext3_ops = {
1454 .fs_owner = THIS_MODULE,
1455 .fs_getlabel = fsfilt_ext3_get_label,
1456 .fs_setlabel = fsfilt_ext3_set_label,
1457 .fs_uuid = fsfilt_ext3_uuid,
1458 .fs_start = fsfilt_ext3_start,
1459 .fs_brw_start = fsfilt_ext3_brw_start,
1460 .fs_extend = fsfilt_ext3_extend,
1461 .fs_commit = fsfilt_ext3_commit,
1462 .fs_commit_async = fsfilt_ext3_commit_async,
1463 .fs_commit_wait = fsfilt_ext3_commit_wait,
1464 .fs_setattr = fsfilt_ext3_setattr,
1465 .fs_iocontrol = fsfilt_ext3_iocontrol,
1466 .fs_set_md = fsfilt_ext3_set_md,
1467 .fs_get_md = fsfilt_ext3_get_md,
1468 .fs_readpage = fsfilt_ext3_readpage,
1469 .fs_add_journal_cb = fsfilt_ext3_add_journal_cb,
1470 .fs_statfs = fsfilt_ext3_statfs,
1471 .fs_sync = fsfilt_ext3_sync,
1472 .fs_map_inode_pages = fsfilt_ext3_map_inode_pages,
1473 .fs_write_record = fsfilt_ext3_write_record,
1474 .fs_read_record = fsfilt_ext3_read_record,
1475 .fs_setup = fsfilt_ext3_setup,
1476 .fs_send_bio = fsfilt_ext3_send_bio,
1477 .fs_get_op_len = fsfilt_ext3_get_op_len,
1478 #ifdef HAVE_DISK_INODE_VERSION
1479 .fs_get_version = fsfilt_ext3_get_version,
1480 .fs_set_version = fsfilt_ext3_set_version,
1482 .fs_journal_sbdev = fsfilt_ext3_journal_sbdev,
1483 .fs_fid2dentry = fsfilt_ext3_fid2dentry,
1486 static int __init fsfilt_ext3_init(void)
1490 fcb_cache = cfs_mem_cache_create("fsfilt_ext3_fcb",
1491 sizeof(struct fsfilt_cb_data), 0, 0);
1493 CERROR("error allocating fsfilt journal callback cache\n");
1494 GOTO(out, rc = -ENOMEM);
1497 rc = fsfilt_register_ops(&fsfilt_ext3_ops);
1500 int err = cfs_mem_cache_destroy(fcb_cache);
1501 LASSERTF(err == 0, "error destroying new cache: rc %d\n", err);
1507 static void __exit fsfilt_ext3_exit(void)
1511 fsfilt_unregister_ops(&fsfilt_ext3_ops);
1512 rc = cfs_mem_cache_destroy(fcb_cache);
1513 LASSERTF(rc == 0, "couldn't destroy fcb_cache slab\n");
1516 module_init(fsfilt_ext3_init);
1517 module_exit(fsfilt_ext3_exit);
1519 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1520 MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
1521 MODULE_LICENSE("GPL");