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 # include <linux/quotaio_v2.h>
59 #elif defined(HAVE_FS_QUOTA_QUOTAIO_H)
60 # include <quota/quotaio_v2.h>
61 # include <quota/quota_tree.h>
62 # define V2_DQTREEOFF QT_TREEOFF
63 #elif defined(HAVE_FS_QUOTAIO_H)
64 # include <quotaio_v2.h>
65 # include <quota_tree.h>
66 # define V2_DQTREEOFF QT_TREEOFF
67 # define V2_INITQVERSIONS_R1 V2_INITQVERSIONS
71 #define QFMT_LUSTRE QFMT_VFS_V1
73 #define QFMT_LUSTRE QFMT_VFS_V0
76 #if defined(HAVE_EXT3_XATTR_H)
77 # include <ext3/xattr.h>
78 #elif !defined(EXT3_XATTR_INDEX_TRUSTED)
79 /* ext3 xattr.h not available in rh style kernel-devel rpm */
80 /* CHAOS kernel-devel package will not include fs/ldiskfs/xattr.h */
81 # define EXT3_XATTR_INDEX_TRUSTED 4
82 extern int ext3_xattr_get(struct inode *, int, const char *, void *, size_t);
83 extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
86 #include <libcfs/libcfs.h>
87 #include <lustre_fsfilt.h>
89 #include <lustre_quota.h>
90 #include <linux/lustre_compat25.h>
91 #include <linux/lprocfs_status.h>
93 #include <ext4/ext4_extents.h>
95 #include "lustre_quota_fmt.h"
97 /* for kernels 2.6.18 and later */
98 #define FSFILT_SINGLEDATA_TRANS_BLOCKS(sb) EXT3_SINGLEDATA_TRANS_BLOCKS(sb)
100 #define fsfilt_ext3_ext_insert_extent(handle, inode, path, newext, flag) \
101 ext3_ext_insert_extent(handle, inode, path, newext, flag)
103 #define ext3_mb_discard_inode_preallocations(inode) \
104 ext3_discard_preallocations(inode)
106 #define fsfilt_log_start_commit(journal, tid) jbd2_log_start_commit(journal, tid)
107 #define fsfilt_log_wait_commit(journal, tid) jbd2_log_wait_commit(journal, tid)
109 #ifdef HAVE_EXT4_JOURNAL_CALLBACK_ADD
110 # define journal_callback ext4_journal_cb_entry
111 # define fsfilt_journal_callback_set(handle, func, jcb) \
112 ext4_journal_callback_add(handle, func, jcb)
113 #elif defined(HAVE_JBD2_JOURNAL_CALLBACK_SET)
114 # define fsfilt_journal_callback_set(handle, func, jcb) \
115 jbd2_journal_callback_set(handle, func, jcb)
116 #elif defined(HAVE_JOURNAL_CALLBACK_SET)
117 # define fsfilt_journal_callback_set(handle, func, jcb) \
118 journal_callback_set(handle, func, jcb)
120 # error missing journal commit callback
121 #endif /* HAVE_EXT4_JOURNAL_CALLBACK_ADD */
123 static cfs_mem_cache_t *fcb_cache;
125 struct fsfilt_cb_data {
126 struct journal_callback cb_jcb; /* jbd private data - MUST BE FIRST */
127 fsfilt_cb_t cb_func; /* MDS/OBD completion function */
128 struct obd_device *cb_obd; /* MDS/OBD completion device */
129 __u64 cb_last_rcvd; /* MDS/OST last committed operation */
130 void *cb_data; /* MDS/OST completion function data */
133 #ifndef ext3_find_next_bit
134 #define ext3_find_next_bit ext2_find_next_bit
137 #ifndef ext2_find_next_bit
138 #ifdef __LITTLE_ENDIAN
139 #define ext2_find_next_bit(addr, size, off) find_next_bit((unsigned long *)(addr), (size), (off))
141 error "Need implementation of find_next_bit on big-endian systems"
142 #endif /* __LITTLE_ENDIAN */
143 #endif /* !ext2_find_next_le_bit */
145 static char *fsfilt_ext3_get_label(struct super_block *sb)
147 return EXT3_SB(sb)->s_es->s_volume_name;
150 static int fsfilt_ext3_set_label(struct super_block *sb, char *label)
152 /* see e.g. fsfilt_ext3_write_record() */
157 journal = EXT3_SB(sb)->s_journal;
158 handle = ext3_journal_start_sb(sb, 1);
159 if (IS_ERR(handle)) {
160 CERROR("can't start transaction\n");
161 return(PTR_ERR(handle));
164 err = ext3_journal_get_write_access(handle, EXT3_SB(sb)->s_sbh);
168 memcpy(EXT3_SB(sb)->s_es->s_volume_name, label,
169 sizeof(EXT3_SB(sb)->s_es->s_volume_name));
171 err = ext3_journal_dirty_metadata(handle, EXT3_SB(sb)->s_sbh);
174 ext3_journal_stop(handle);
179 static char *fsfilt_ext3_uuid(struct super_block *sb)
181 return EXT3_SB(sb)->s_es->s_uuid;
184 #ifdef HAVE_DISK_INODE_VERSION
186 static __u64 get_i_version(struct inode *inode)
188 return EXT3_I(inode)->i_fs_version;
191 static void set_i_version(struct inode *inode, __u64 new_version)
193 (EXT3_I(inode))->i_fs_version = new_version;
197 * Get the 64-bit version for an inode.
199 static __u64 fsfilt_ext3_get_version(struct inode *inode)
201 CDEBUG(D_INFO, "Get version "LPX64" for inode %lu\n",
202 get_i_version(inode), inode->i_ino);
203 return get_i_version(inode);
207 * Set the 64-bit version and return the old version.
209 static __u64 fsfilt_ext3_set_version(struct inode *inode, __u64 new_version)
211 __u64 old_version = get_i_version(inode);
213 CDEBUG(D_INFO, "Set version "LPX64" (old "LPX64") for inode %lu\n",
214 new_version, old_version, inode->i_ino);
215 set_i_version(inode, new_version);
216 /* version is set after all inode operations are finished, so we should
217 * mark it dirty here */
218 inode->i_sb->s_op->dirty_inode(inode);
224 /* kernel has ext4_blocks_for_truncate since linux-3.1.1 */
225 #ifdef HAVE_BLOCKS_FOR_TRUNCATE
226 # include <ext4/truncate.h>
228 static inline unsigned long ext4_blocks_for_truncate(struct inode *inode)
232 needed = inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9);
235 if (needed > EXT4_MAX_TRANS_DATA)
236 needed = EXT4_MAX_TRANS_DATA;
237 return EXT4_DATA_TRANS_BLOCKS(inode->i_sb) + needed;
242 * We don't currently need any additional blocks for rmdir and
243 * unlink transactions because we are storing the OST oa_id inside
244 * the inode (which we will be changing anyways as part of this
247 static void *fsfilt_ext3_start(struct inode *inode, int op, void *desc_private,
250 /* For updates to the last received file */
251 int nblocks = FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
255 if (current->journal_info) {
256 CDEBUG(D_INODE, "increasing refcount on %p\n",
257 current->journal_info);
262 case FSFILT_OP_RMDIR:
263 case FSFILT_OP_UNLINK:
264 /* delete one file + create/update logs for each stripe */
265 nblocks += EXT3_DELETE_TRANS_BLOCKS(inode->i_sb);
266 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
267 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
269 case FSFILT_OP_RENAME:
270 /* modify additional directory */
271 nblocks += FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb);
273 case FSFILT_OP_SYMLINK:
274 /* additional block + block bitmap + GDT for long symlink */
277 case FSFILT_OP_CREATE: {
280 case FSFILT_OP_MKDIR:
281 case FSFILT_OP_MKNOD:
282 /* modify one inode + block bitmap + GDT */
286 /* modify parent directory */
287 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
288 EXT3_DATA_TRANS_BLOCKS(inode->i_sb);
289 /* create/update logs for each stripe */
290 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
291 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
293 case FSFILT_OP_SETATTR:
294 /* Setattr on inode */
296 nblocks += EXT3_INDEX_EXTRA_TRANS_BLOCKS +
297 EXT3_DATA_TRANS_BLOCKS(inode->i_sb);
298 /* quota chown log for each stripe */
299 nblocks += (EXT3_INDEX_EXTRA_TRANS_BLOCKS +
300 FSFILT_SINGLEDATA_TRANS_BLOCKS(inode->i_sb)) * logs;
302 case FSFILT_OP_CANCEL_UNLINK:
305 /* blocks for log header bitmap update OR
306 * blocks for catalog header bitmap update + unlink of logs +
307 * blocks for delete the inode (include blocks truncating). */
308 nblocks = (LLOG_CHUNK_SIZE >> inode->i_blkbits) +
309 EXT3_DELETE_TRANS_BLOCKS(inode->i_sb) +
310 ext4_blocks_for_truncate(inode) + 3;
312 default: CERROR("unknown transaction start op %d\n", op);
316 LASSERT(current->journal_info == desc_private);
317 journal = EXT3_SB(inode->i_sb)->s_journal;
318 if (nblocks > journal->j_max_transaction_buffers) {
319 CWARN("too many credits %d for op %ux%u using %d instead\n",
320 nblocks, op, logs, journal->j_max_transaction_buffers);
321 nblocks = journal->j_max_transaction_buffers;
325 LASSERTF(nblocks > 0, "can't start %d credit transaction\n", nblocks);
326 handle = ext3_journal_start(inode, nblocks);
329 LASSERT(current->journal_info == handle);
331 CERROR("error starting handle for op %u (%u credits): rc %ld\n",
332 op, nblocks, PTR_ERR(handle));
337 * Calculate the number of buffer credits needed to write multiple pages in
338 * a single ext3 transaction. No, this shouldn't be here, but as yet ext3
339 * doesn't have a nice API for calculating this sort of thing in advance.
341 * See comment above ext3_writepage_trans_blocks for details. We assume
342 * no data journaling is being done, but it does allow for all of the pages
343 * being non-contiguous. If we are guaranteed contiguous pages we could
344 * reduce the number of (d)indirect blocks a lot.
346 * With N blocks per page and P pages, for each inode we have at most:
348 * min(N*P, blocksize/4 + 1) dindirect blocks
351 * For the entire filesystem, we have at most:
352 * min(sum(nindir + P), ngroups) bitmap blocks (from the above)
353 * min(sum(nindir + P), gdblocks) group descriptor blocks (from the above)
354 * objcount inode blocks
356 * 2 * EXT3_SINGLEDATA_TRANS_BLOCKS for the quota files
358 * 1 EXT3_DATA_TRANS_BLOCKS for the last_rcvd update.
360 static int fsfilt_ext3_credits_needed(int objcount, struct fsfilt_objinfo *fso,
361 int niocount, struct niobuf_local *nb)
363 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
365 const int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
366 int nbitmaps = 0, ngdblocks;
367 int needed = objcount + 1; /* inodes + superblock */
370 for (i = 0, j = 0; i < objcount; i++, fso++) {
371 /* two or more dindirect blocks in case we cross boundary */
373 (long)((nb[j + fso->fso_bufcnt - 1].lnb_file_offset -
374 nb[j].lnb_file_offset) >>
375 sb->s_blocksize_bits) /
376 (EXT3_ADDR_PER_BLOCK(sb) * EXT3_ADDR_PER_BLOCK(sb));
377 nbitmaps += min(fso->fso_bufcnt, ndind > 0 ? ndind : 2);
379 /* leaf, indirect, tindirect blocks for first block */
380 nbitmaps += blockpp + 2;
382 j += fso->fso_bufcnt;
385 next_indir = nb[0].lnb_file_offset +
386 (EXT3_ADDR_PER_BLOCK(sb) << sb->s_blocksize_bits);
387 for (i = 1; i < niocount; i++) {
388 if (nb[i].lnb_file_offset >= next_indir) {
389 nbitmaps++; /* additional indirect */
390 next_indir = nb[i].lnb_file_offset +
391 (EXT3_ADDR_PER_BLOCK(sb) <<
392 sb->s_blocksize_bits);
393 } else if (nb[i].lnb_file_offset !=
394 nb[i - 1].lnb_file_offset + sb->s_blocksize) {
395 nbitmaps++; /* additional indirect */
397 nbitmaps += blockpp; /* each leaf in different group? */
400 ngdblocks = nbitmaps;
401 if (nbitmaps > EXT3_SB(sb)->s_groups_count)
402 nbitmaps = EXT3_SB(sb)->s_groups_count;
403 if (ngdblocks > EXT3_SB(sb)->s_gdb_count)
404 ngdblocks = EXT3_SB(sb)->s_gdb_count;
406 needed += nbitmaps + ngdblocks;
408 /* last_rcvd update */
409 needed += EXT3_DATA_TRANS_BLOCKS(sb);
411 #if defined(CONFIG_QUOTA)
412 /* We assume that there will be 1 bit set in s_dquot.flags for each
413 * quota file that is active. This is at least true for now.
415 needed += hweight32(sb_any_quota_loaded(sb)) *
416 FSFILT_SINGLEDATA_TRANS_BLOCKS(sb);
422 /* We have to start a huge journal transaction here to hold all of the
423 * metadata for the pages being written here. This is necessitated by
424 * the fact that we do lots of prepare_write operations before we do
425 * any of the matching commit_write operations, so even if we split
426 * up to use "smaller" transactions none of them could complete until
427 * all of them were opened. By having a single journal transaction,
428 * we eliminate duplicate reservations for common blocks like the
429 * superblock and group descriptors or bitmaps.
431 * We will start the transaction here, but each prepare_write will
432 * add a refcount to the transaction, and each commit_write will
433 * remove a refcount. The transaction will be closed when all of
434 * the pages have been written.
436 static void *fsfilt_ext3_brw_start(int objcount, struct fsfilt_objinfo *fso,
437 int niocount, struct niobuf_local *nb,
438 void *desc_private, int logs)
445 LASSERT(current->journal_info == desc_private);
446 journal = EXT3_SB(fso->fso_dentry->d_inode->i_sb)->s_journal;
447 needed = fsfilt_ext3_credits_needed(objcount, fso, niocount, nb);
449 /* The number of blocks we could _possibly_ dirty can very large.
450 * We reduce our request if it is absurd (and we couldn't get that
451 * many credits for a single handle anyways).
453 * At some point we have to limit the size of I/Os sent at one time,
454 * increase the size of the journal, or we have to calculate the
455 * actual journal requirements more carefully by checking all of
456 * the blocks instead of being maximally pessimistic. It remains to
457 * be seen if this is a real problem or not.
459 if (needed > journal->j_max_transaction_buffers) {
460 CERROR("want too many journal credits (%d) using %d instead\n",
461 needed, journal->j_max_transaction_buffers);
462 needed = journal->j_max_transaction_buffers;
465 LASSERTF(needed > 0, "can't start %d credit transaction\n", needed);
466 handle = ext3_journal_start(fso->fso_dentry->d_inode, needed);
467 if (IS_ERR(handle)) {
468 CERROR("can't get handle for %d credits: rc = %ld\n", needed,
471 LASSERT(handle->h_buffer_credits >= needed);
472 LASSERT(current->journal_info == handle);
478 static int fsfilt_ext3_extend(struct inode *inode, unsigned int nblocks,void *h)
480 handle_t *handle = h;
482 /* fsfilt_extend called with nblocks = 0 for testing in special cases */
484 handle->h_buffer_credits = 0;
485 CWARN("setting credits of handle %p to zero by request\n", h);
488 if (handle->h_buffer_credits > nblocks)
490 if (ext3_journal_extend(handle, nblocks) == 0)
493 ext3_mark_inode_dirty(handle, inode);
494 return ext3_journal_restart(handle, nblocks);
497 static int fsfilt_ext3_commit(struct inode *inode, void *h, int force_sync)
500 handle_t *handle = h;
502 LASSERT(current->journal_info == handle);
504 handle->h_sync = 1; /* recovery likes this */
506 rc = ext3_journal_stop(handle);
511 static int fsfilt_ext3_commit_async(struct inode *inode, void *h,
515 transaction_t *transaction;
516 handle_t *handle = h;
520 LASSERT(current->journal_info == handle);
522 transaction = handle->h_transaction;
523 journal = transaction->t_journal;
524 tid = transaction->t_tid;
525 /* we don't want to be blocked */
527 rc = ext3_journal_stop(handle);
529 CERROR("error while stopping transaction: %d\n", rc);
532 fsfilt_log_start_commit(journal, tid);
534 *wait_handle = (void *) tid;
535 CDEBUG(D_INODE, "commit async: %lu\n", (unsigned long) tid);
539 static int fsfilt_ext3_commit_wait(struct inode *inode, void *h)
541 journal_t *journal = EXT3_JOURNAL(inode);
542 tid_t tid = (tid_t)(long)h;
544 CDEBUG(D_INODE, "commit wait: %lu\n", (unsigned long) tid);
545 if (unlikely(is_journal_aborted(journal)))
548 fsfilt_log_wait_commit(EXT3_JOURNAL(inode), tid);
550 if (unlikely(is_journal_aborted(journal)))
555 static int fsfilt_ext3_setattr(struct dentry *dentry, void *handle,
556 struct iattr *iattr, int do_trunc)
558 struct inode *inode = dentry->d_inode;
561 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 7, 50, 0)
562 /* Try to correct for a bug in 2.1.0 (LU-221) that caused negative
563 * timestamps to appear to be in the far future, due old timestamp
564 * being stored on disk as an unsigned value. This fixes up any
565 * bad values held by the client before storing them on disk,
566 * and ensures any timestamp updates are correct. LU-1042 */
567 if (unlikely(LTIME_S(inode->i_atime) == LU221_BAD_TIME &&
568 !(iattr->ia_valid & ATTR_ATIME))) {
569 iattr->ia_valid |= ATTR_ATIME;
570 LTIME_S(iattr->ia_atime) = 0;
572 if (unlikely(LTIME_S(inode->i_mtime) == LU221_BAD_TIME &&
573 !(iattr->ia_valid & ATTR_MTIME))) {
574 iattr->ia_valid |= ATTR_MTIME;
575 LTIME_S(iattr->ia_mtime) = 0;
577 if (unlikely((LTIME_S(inode->i_ctime) == LU221_BAD_TIME ||
578 LTIME_S(inode->i_ctime) == 0) &&
579 !(iattr->ia_valid & ATTR_CTIME))) {
580 iattr->ia_valid |= ATTR_CTIME;
581 LTIME_S(iattr->ia_ctime) = 0;
584 #warning "remove old LU-221/LU-1042 workaround code"
587 /* When initializating timestamps for new inodes, use the filesystem
588 * mkfs time for ctime to avoid e2fsck ibadness incorrectly thinking
589 * that this is potentially an invalid inode. Files with an old ctime
590 * migrated to a newly-formatted OST with a newer s_mkfs_time will not
591 * hit this check, since it is only for ctime == 0. LU-1010/LU-1042 */
592 if ((iattr->ia_valid & ATTR_CTIME) && LTIME_S(iattr->ia_ctime) == 0)
593 LTIME_S(iattr->ia_ctime) =
594 EXT4_SB(inode->i_sb)->s_es->s_mkfs_time;
596 /* Avoid marking the inode dirty on the superblock list unnecessarily.
597 * We are already writing the inode to disk as part of this
598 * transaction and want to avoid a lot of extra inode writeout
599 * later on. b=9828 */
600 if (iattr->ia_valid & ATTR_SIZE && !do_trunc) {
601 /* ATTR_SIZE would invoke truncate: clear it */
602 iattr->ia_valid &= ~ATTR_SIZE;
603 EXT3_I(inode)->i_disksize = iattr->ia_size;
604 i_size_write(inode, iattr->ia_size);
606 if (iattr->ia_valid & ATTR_UID)
607 inode->i_uid = iattr->ia_uid;
608 if (iattr->ia_valid & ATTR_GID)
609 inode->i_gid = iattr->ia_gid;
610 if (iattr->ia_valid & ATTR_ATIME)
611 inode->i_atime = iattr->ia_atime;
612 if (iattr->ia_valid & ATTR_MTIME)
613 inode->i_mtime = iattr->ia_mtime;
614 if (iattr->ia_valid & ATTR_CTIME)
615 inode->i_ctime = iattr->ia_ctime;
616 if (iattr->ia_valid & ATTR_MODE) {
617 inode->i_mode = iattr->ia_mode;
619 if (!cfs_curproc_is_in_groups(inode->i_gid) &&
620 !cfs_capable(CFS_CAP_FSETID))
621 inode->i_mode &= ~S_ISGID;
624 inode->i_sb->s_op->dirty_inode(inode);
629 /* Don't allow setattr to change file type */
630 if (iattr->ia_valid & ATTR_MODE)
631 iattr->ia_mode = (inode->i_mode & S_IFMT) |
632 (iattr->ia_mode & ~S_IFMT);
634 /* We set these flags on the client, but have already checked perms
635 * so don't confuse inode_change_ok. */
636 iattr->ia_valid &= ~TIMES_SET_FLAGS;
638 if (inode->i_op->setattr) {
639 rc = inode->i_op->setattr(dentry, iattr);
641 #ifndef HAVE_SIMPLE_SETATTR /* simple_setattr() already call it */
642 rc = inode_change_ok(inode, iattr);
645 rc = simple_setattr(dentry, iattr);
652 static int fsfilt_ext3_iocontrol(struct inode *inode, struct file *file,
653 unsigned int cmd, unsigned long arg)
658 /* FIXME: Can't do this because of nested transaction deadlock */
659 if (cmd == EXT3_IOC_SETFLAGS) {
660 /* We can't enable data journaling on OST objects, because
661 * this forces the transaction to be closed in order to
662 * flush the journal, but the caller will already have a
663 * compound transaction open to update the last_rcvd file,
664 * and this thread would deadlock trying to set the flag. */
665 if ((*(int *)arg) & EXT3_JOURNAL_DATA_FL) {
666 CERROR("can't set data journal flag on file\n");
669 /* Because the MDS does not see the EXTENTS_FL set on the
670 * OST objects, mask this flag into all set flags. It is
671 * not legal to clear this flag in any case, so we are not
672 * changing the functionality by doing this. b=22911 */
673 *(int *)arg |= EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL;
676 /* ext4_ioctl does not have a inode argument */
677 if (inode->i_fop->unlocked_ioctl)
678 rc = inode->i_fop->unlocked_ioctl(file, cmd, arg);
685 static int fsfilt_ext3_set_md(struct inode *inode, void *handle,
686 void *lmm, int lmm_size, const char *name)
690 LASSERT(mutex_trylock(&inode->i_mutex) == 0);
692 rc = ext3_xattr_set_handle(handle, inode, EXT3_XATTR_INDEX_TRUSTED,
693 name, lmm, lmm_size, XATTR_NO_CTIME);
695 if (rc && rc != -EROFS)
696 CERROR("error adding MD data to inode %lu: rc = %d\n",
701 /* Must be called with i_mutex held */
702 static int fsfilt_ext3_get_md(struct inode *inode, void *lmm, int lmm_size,
707 LASSERT(mutex_trylock(&inode->i_mutex) == 0);
709 rc = ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED,
710 name, lmm, lmm_size);
712 /* This gives us the MD size */
714 return (rc == -ENODATA) ? 0 : rc;
717 CDEBUG(D_INFO, "error getting EA %d/%s from inode %lu: rc %d\n",
718 EXT3_XATTR_INDEX_TRUSTED, name,
720 memset(lmm, 0, lmm_size);
721 return (rc == -ENODATA) ? 0 : rc;
727 static int fsfilt_ext3_send_bio(int rw, struct inode *inode, struct bio *bio)
733 static ssize_t fsfilt_ext3_readpage(struct file *file, char *buf, size_t count,
736 struct inode *inode = file->f_dentry->d_inode;
739 if (S_ISREG(inode->i_mode))
740 rc = file->f_op->read(file, buf, count, off);
742 const int blkbits = inode->i_sb->s_blocksize_bits;
743 const int blksize = inode->i_sb->s_blocksize;
745 CDEBUG(D_EXT2, "reading %lu at dir %lu+%llu\n",
746 (unsigned long)count, inode->i_ino, *off);
748 struct buffer_head *bh;
751 if (*off < i_size_read(inode)) {
754 bh = ext3_bread(NULL, inode, *off >> blkbits,
757 CDEBUG(D_EXT2, "read %u@%llu\n", blksize, *off);
760 memcpy(buf, bh->b_data, blksize);
763 /* XXX in theory we should just fake
764 * this buffer and continue like ext3,
765 * especially if this is a partial read
767 CERROR("error read dir %lu+%llu: %d\n",
768 inode->i_ino, *off, err);
773 struct ext3_dir_entry_2 *fake = (void *)buf;
775 CDEBUG(D_EXT2, "fake %u@%llu\n", blksize, *off);
776 memset(fake, 0, sizeof(*fake));
777 fake->rec_len = cpu_to_le16(blksize);
789 #ifdef HAVE_EXT4_JOURNAL_CALLBACK_ADD
790 static void fsfilt_ext3_cb_func(struct super_block *sb,
791 struct journal_callback *jcb, int error)
793 static void fsfilt_ext3_cb_func(struct journal_callback *jcb, int error)
796 struct fsfilt_cb_data *fcb = container_of(jcb, typeof(*fcb), cb_jcb);
798 fcb->cb_func(fcb->cb_obd, fcb->cb_last_rcvd, fcb->cb_data, error);
800 OBD_SLAB_FREE(fcb, fcb_cache, sizeof *fcb);
803 static int fsfilt_ext3_add_journal_cb(struct obd_device *obd, __u64 last_rcvd,
804 void *handle, fsfilt_cb_t cb_func,
807 struct fsfilt_cb_data *fcb;
809 OBD_SLAB_ALLOC_PTR_GFP(fcb, fcb_cache, CFS_ALLOC_IO);
813 fcb->cb_func = cb_func;
815 fcb->cb_last_rcvd = last_rcvd;
816 fcb->cb_data = cb_data;
818 CDEBUG(D_EXT2, "set callback for last_rcvd: "LPD64"\n", last_rcvd);
819 fsfilt_journal_callback_set(handle, fsfilt_ext3_cb_func, &fcb->cb_jcb);
824 static int fsfilt_ext3_statfs(struct super_block *sb, struct obd_statfs *osfs)
829 memset(&sfs, 0, sizeof(sfs));
830 rc = sb->s_op->statfs(sb->s_root, &sfs);
831 statfs_pack(osfs, &sfs);
835 static int fsfilt_ext3_sync(struct super_block *sb)
837 return ext3_force_commit(sb);
840 #ifndef EXT3_EXTENTS_FL
841 #define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */
845 #define EXT_ASSERT(cond) BUG_ON(!(cond))
848 #define EXT_GENERATION(inode) (EXT4_I(inode)->i_ext_generation)
849 #define ext3_ext_base inode
850 #define ext3_ext_base2inode(inode) (inode)
851 #define EXT_DEPTH(inode) ext_depth(inode)
852 #define fsfilt_ext3_ext_walk_space(inode, block, num, cb, cbdata) \
853 ext3_ext_walk_space(inode, block, num, cb, cbdata);
856 unsigned long *blocks;
864 static long ext3_ext_find_goal(struct inode *inode, struct ext3_ext_path *path,
865 unsigned long block, int *aflags)
867 struct ext3_inode_info *ei = EXT3_I(inode);
868 unsigned long bg_start;
869 unsigned long colour;
873 struct ext3_extent *ex;
874 depth = path->p_depth;
876 /* try to predict block placement */
877 if ((ex = path[depth].p_ext))
878 return ext_pblock(ex) + (block - le32_to_cpu(ex->ee_block));
880 /* it looks index is empty
881 * try to find starting from index itself */
882 if (path[depth].p_bh)
883 return path[depth].p_bh->b_blocknr;
886 /* OK. use inode's group */
887 bg_start = (ei->i_block_group * EXT3_BLOCKS_PER_GROUP(inode->i_sb)) +
888 le32_to_cpu(EXT3_SB(inode->i_sb)->s_es->s_first_data_block);
889 colour = (current->pid % 16) *
890 (EXT3_BLOCKS_PER_GROUP(inode->i_sb) / 16);
891 return bg_start + colour + block;
894 #define ll_unmap_underlying_metadata(sb, blocknr) \
895 unmap_underlying_metadata((sb)->s_bdev, blocknr)
897 #ifndef EXT3_MB_HINT_GROUP_ALLOC
898 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
899 struct ext3_ext_path *path, unsigned long block,
900 unsigned long *count, int *err)
902 unsigned long pblock, goal;
904 struct inode *inode = ext3_ext_base2inode(base);
906 goal = ext3_ext_find_goal(inode, path, block, &aflags);
907 aflags |= 2; /* block have been already reserved */
908 pblock = ext3_mb_new_blocks(handle, inode, goal, count, aflags, err);
913 static unsigned long new_blocks(handle_t *handle, struct ext3_ext_base *base,
914 struct ext3_ext_path *path, unsigned long block,
915 unsigned long *count, int *err)
917 struct inode *inode = ext3_ext_base2inode(base);
918 struct ext3_allocation_request ar;
919 unsigned long pblock;
922 /* find neighbour allocated blocks */
924 *err = ext3_ext_search_left(base, path, &ar.lleft, &ar.pleft);
928 *err = ext3_ext_search_right(base, path, &ar.lright, &ar.pright);
932 /* allocate new block */
933 ar.goal = ext3_ext_find_goal(inode, path, block, &aflags);
937 ar.flags = EXT3_MB_HINT_DATA;
938 pblock = ext3_mb_new_blocks(handle, &ar, err);
944 static int ext3_ext_new_extent_cb(struct ext3_ext_base *base,
945 struct ext3_ext_path *path,
946 struct ext3_ext_cache *cex,
947 #ifdef HAVE_EXT_PREPARE_CB_EXTENT
948 struct ext3_extent *ex,
952 struct bpointers *bp = cbdata;
953 struct inode *inode = ext3_ext_base2inode(base);
954 struct ext3_extent nex;
955 unsigned long pblock;
961 if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
966 if (bp->create == 0) {
968 if (cex->ec_block < bp->start)
969 i = bp->start - cex->ec_block;
970 if (i >= cex->ec_len)
971 CERROR("nothing to do?! i = %d, e_num = %u\n",
973 for (; i < cex->ec_len && bp->num; i++) {
985 tgen = EXT_GENERATION(base);
986 count = ext3_ext_calc_credits_for_insert(base, path);
988 handle = ext3_journal_start(inode, count+EXT3_ALLOC_NEEDED+1);
989 if (IS_ERR(handle)) {
990 return PTR_ERR(handle);
993 if (tgen != EXT_GENERATION(base)) {
994 /* the tree has changed. so path can be invalid at moment */
995 ext3_journal_stop(handle);
999 /* In 2.6.32 kernel, ext4_ext_walk_space()'s callback func is not
1000 * protected by i_data_sem as whole. so we patch it to store
1001 * generation to path and now verify the tree hasn't changed */
1002 down_write((&EXT4_I(inode)->i_data_sem));
1004 /* validate extent, make sure the extent tree does not changed */
1005 if (EXT_GENERATION(base) != path[0].p_generation) {
1006 /* cex is invalid, try again */
1007 up_write(&EXT4_I(inode)->i_data_sem);
1008 ext3_journal_stop(handle);
1012 count = cex->ec_len;
1013 pblock = new_blocks(handle, base, path, cex->ec_block, &count, &err);
1016 EXT_ASSERT(count <= cex->ec_len);
1018 /* insert new extent */
1019 nex.ee_block = cpu_to_le32(cex->ec_block);
1020 ext3_ext_store_pblock(&nex, pblock);
1021 nex.ee_len = cpu_to_le16(count);
1022 err = fsfilt_ext3_ext_insert_extent(handle, base, path, &nex, 0);
1024 /* free data blocks we just allocated */
1025 /* not a good idea to call discard here directly,
1026 * but otherwise we'd need to call it every free() */
1027 #ifdef EXT3_MB_HINT_GROUP_ALLOC
1028 ext3_mb_discard_inode_preallocations(inode);
1030 ext3_free_blocks(handle, inode, ext_pblock(&nex),
1031 cpu_to_le16(nex.ee_len), 0);
1036 * Putting len of the actual extent we just inserted,
1037 * we are asking ext3_ext_walk_space() to continue
1038 * scaning after that block
1040 cex->ec_len = le16_to_cpu(nex.ee_len);
1041 cex->ec_start = ext_pblock(&nex);
1042 BUG_ON(le16_to_cpu(nex.ee_len) == 0);
1043 BUG_ON(le32_to_cpu(nex.ee_block) != cex->ec_block);
1046 up_write((&EXT4_I(inode)->i_data_sem));
1047 ext3_journal_stop(handle);
1052 CERROR("hmm. why do we find this extent?\n");
1053 CERROR("initial space: %lu:%u\n",
1054 bp->start, bp->init_num);
1055 CERROR("current extent: %u/%u/%llu %d\n",
1056 cex->ec_block, cex->ec_len,
1057 (unsigned long long)cex->ec_start,
1061 if (cex->ec_block < bp->start)
1062 i = bp->start - cex->ec_block;
1063 if (i >= cex->ec_len)
1064 CERROR("nothing to do?! i = %d, e_num = %u\n",
1066 for (; i < cex->ec_len && bp->num; i++) {
1067 *(bp->blocks) = cex->ec_start + i;
1068 if (cex->ec_type == EXT3_EXT_CACHE_EXTENT) {
1072 /* unmap any possible underlying metadata from
1073 * the block device mapping. bug 6998. */
1074 ll_unmap_underlying_metadata(inode->i_sb,
1086 int fsfilt_map_nblocks(struct inode *inode, unsigned long block,
1087 unsigned long num, unsigned long *blocks,
1088 int *created, int create)
1090 struct ext3_ext_base *base = inode;
1091 struct bpointers bp;
1094 CDEBUG(D_OTHER, "blocks %lu-%lu requested for inode %u\n",
1095 block, block + num - 1, (unsigned) inode->i_ino);
1098 bp.created = created;
1100 bp.init_num = bp.num = num;
1103 err = fsfilt_ext3_ext_walk_space(base, block, num,
1104 ext3_ext_new_extent_cb, &bp);
1105 ext3_ext_invalidate_cache(base);
1110 int fsfilt_ext3_map_ext_inode_pages(struct inode *inode, struct page **page,
1111 int pages, unsigned long *blocks,
1112 int *created, int create)
1114 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1116 struct page *fp = NULL;
1119 CDEBUG(D_OTHER, "inode %lu: map %d pages from %lu\n",
1120 inode->i_ino, pages, (*page)->index);
1122 /* pages are sorted already. so, we just have to find
1123 * contig. space and process them properly */
1126 /* start new extent */
1131 } else if (fp->index + clen == (*page)->index) {
1132 /* continue the extent */
1139 /* process found extent */
1140 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1141 clen * blocks_per_page, blocks,
1146 /* look for next extent */
1148 blocks += blocks_per_page * clen;
1149 created += blocks_per_page * clen;
1153 rc = fsfilt_map_nblocks(inode, fp->index * blocks_per_page,
1154 clen * blocks_per_page, blocks,
1160 extern int ext3_map_inode_page(struct inode *inode, struct page *page,
1161 unsigned long *blocks, int *created, int create);
1162 int fsfilt_ext3_map_bm_inode_pages(struct inode *inode, struct page **page,
1163 int pages, unsigned long *blocks,
1164 int *created, int create)
1166 int blocks_per_page = CFS_PAGE_SIZE >> inode->i_blkbits;
1170 for (i = 0, cr = created, b = blocks; i < pages; i++, page++) {
1171 rc = ext3_map_inode_page(inode, *page, b, cr, create);
1173 CERROR("ino %lu, blk %lu cr %u create %d: rc %d\n",
1174 inode->i_ino, *b, *cr, create, rc);
1178 b += blocks_per_page;
1179 cr += blocks_per_page;
1184 int fsfilt_ext3_map_inode_pages(struct inode *inode, struct page **page,
1185 int pages, unsigned long *blocks,
1186 int *created, int create,
1187 cfs_mutex_t *optional_mutex)
1191 if (EXT3_I(inode)->i_flags & EXT3_EXTENTS_FL) {
1192 rc = fsfilt_ext3_map_ext_inode_pages(inode, page, pages,
1193 blocks, created, create);
1196 if (optional_mutex != NULL)
1197 cfs_mutex_lock(optional_mutex);
1198 rc = fsfilt_ext3_map_bm_inode_pages(inode, page, pages, blocks,
1200 if (optional_mutex != NULL)
1201 cfs_mutex_unlock(optional_mutex);
1206 int fsfilt_ext3_read(struct inode *inode, void *buf, int size, loff_t *offs)
1208 unsigned long block;
1209 struct buffer_head *bh;
1210 int err, blocksize, csize, boffs, osize = size;
1212 /* prevent reading after eof */
1213 spin_lock(&inode->i_lock);
1214 if (i_size_read(inode) < *offs + size) {
1215 size = i_size_read(inode) - *offs;
1216 spin_unlock(&inode->i_lock);
1218 CDEBUG(D_EXT2, "size %llu is too short for read @%llu\n",
1219 i_size_read(inode), *offs);
1221 } else if (size == 0) {
1225 spin_unlock(&inode->i_lock);
1228 blocksize = 1 << inode->i_blkbits;
1231 block = *offs >> inode->i_blkbits;
1232 boffs = *offs & (blocksize - 1);
1233 csize = min(blocksize - boffs, size);
1234 bh = ext3_bread(NULL, inode, block, 0, &err);
1236 CERROR("can't read block: %d\n", err);
1240 memcpy(buf, bh->b_data + boffs, csize);
1249 EXPORT_SYMBOL(fsfilt_ext3_read);
1251 static int fsfilt_ext3_read_record(struct file * file, void *buf,
1252 int size, loff_t *offs)
1255 rc = fsfilt_ext3_read(file->f_dentry->d_inode, buf, size, offs);
1261 int fsfilt_ext3_write_handle(struct inode *inode, void *buf, int bufsize,
1262 loff_t *offs, handle_t *handle)
1264 struct buffer_head *bh = NULL;
1265 loff_t old_size = i_size_read(inode), offset = *offs;
1266 loff_t new_size = i_size_read(inode);
1267 unsigned long block;
1268 int err = 0, blocksize = 1 << inode->i_blkbits, size, boffs;
1270 while (bufsize > 0) {
1274 block = offset >> inode->i_blkbits;
1275 boffs = offset & (blocksize - 1);
1276 size = min(blocksize - boffs, bufsize);
1277 bh = ext3_bread(handle, inode, block, 1, &err);
1279 CERROR("can't read/create block: %d\n", err);
1283 err = ext3_journal_get_write_access(handle, bh);
1285 CERROR("journal_get_write_access() returned error %d\n",
1289 LASSERT(bh->b_data + boffs + size <= bh->b_data + bh->b_size);
1290 memcpy(bh->b_data + boffs, buf, size);
1291 err = ext3_journal_dirty_metadata(handle, bh);
1293 CERROR("journal_dirty_metadata() returned error %d\n",
1297 if (offset + size > new_size)
1298 new_size = offset + size;
1306 /* correct in-core and on-disk sizes */
1307 if (new_size > i_size_read(inode)) {
1308 spin_lock(&inode->i_lock);
1309 if (new_size > i_size_read(inode))
1310 i_size_write(inode, new_size);
1311 if (i_size_read(inode) > EXT3_I(inode)->i_disksize)
1312 EXT3_I(inode)->i_disksize = i_size_read(inode);
1313 if (i_size_read(inode) > old_size) {
1314 spin_unlock(&inode->i_lock);
1315 mark_inode_dirty(inode);
1317 spin_unlock(&inode->i_lock);
1325 EXPORT_SYMBOL(fsfilt_ext3_write_handle);
1327 static int fsfilt_ext3_write_record(struct file *file, void *buf, int bufsize,
1328 loff_t *offs, int force_sync)
1330 struct inode *inode = file->f_dentry->d_inode;
1332 int err, block_count = 0, blocksize;
1334 /* Determine how many transaction credits are needed */
1335 blocksize = 1 << inode->i_blkbits;
1336 block_count = (*offs & (blocksize - 1)) + bufsize;
1337 block_count = (block_count + blocksize - 1) >> inode->i_blkbits;
1339 handle = ext3_journal_start(inode,
1340 block_count * EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + 2);
1341 if (IS_ERR(handle)) {
1342 CERROR("can't start transaction for %d blocks (%d bytes)\n",
1343 block_count * EXT3_DATA_TRANS_BLOCKS(inode->i_sb) + 2,
1345 return PTR_ERR(handle);
1348 err = fsfilt_ext3_write_handle(inode, buf, bufsize, offs, handle);
1350 if (!err && force_sync)
1351 handle->h_sync = 1; /* recovery likes this */
1353 ext3_journal_stop(handle);
1358 static int fsfilt_ext3_setup(struct super_block *sb)
1360 if (!EXT3_HAS_COMPAT_FEATURE(sb,
1361 EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1362 CERROR("ext3 mounted without journal\n");
1367 CWARN("Enabling PDIROPS\n");
1368 set_opt(EXT3_SB(sb)->s_mount_opt, PDIROPS);
1369 sb->s_flags |= S_PDIROPS;
1371 if (!EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_DIR_INDEX))
1372 CWARN("filesystem doesn't have dir_index feature enabled\n");
1376 /* If fso is NULL, op is FSFILT operation, otherwise op is number of fso
1377 objects. Logs is number of logfiles to update */
1378 static int fsfilt_ext3_get_op_len(int op, struct fsfilt_objinfo *fso, int logs)
1382 case FSFILT_OP_CREATE:
1383 /* directory leaf, index & indirect & EA*/
1384 return 4 + 3 * logs;
1385 case FSFILT_OP_UNLINK:
1391 struct super_block *sb = fso->fso_dentry->d_inode->i_sb;
1392 int blockpp = 1 << (CFS_PAGE_SHIFT - sb->s_blocksize_bits);
1393 int addrpp = EXT3_ADDR_PER_BLOCK(sb) * blockpp;
1394 for (i = 0; i < op; i++, fso++) {
1395 int nblocks = fso->fso_bufcnt * blockpp;
1396 int ndindirect = min(nblocks, addrpp + 1);
1397 int nindir = nblocks + ndindirect + 1;
1401 return needed + 3 * logs;
1407 #define DQINFO_COPY(out, in) \
1409 Q_COPY(out, in, dqi_bgrace); \
1410 Q_COPY(out, in, dqi_igrace); \
1411 Q_COPY(out, in, dqi_flags); \
1412 Q_COPY(out, in, dqi_valid); \
1415 #define DQBLK_COPY(out, in) \
1417 Q_COPY(out, in, dqb_bhardlimit); \
1418 Q_COPY(out, in, dqb_bsoftlimit); \
1419 Q_COPY(out, in, dqb_curspace); \
1420 Q_COPY(out, in, dqb_ihardlimit); \
1421 Q_COPY(out, in, dqb_isoftlimit); \
1422 Q_COPY(out, in, dqb_curinodes); \
1423 Q_COPY(out, in, dqb_btime); \
1424 Q_COPY(out, in, dqb_itime); \
1425 Q_COPY(out, in, dqb_valid); \
1428 static int fsfilt_ext3_quotactl(struct super_block *sb,
1429 struct obd_quotactl *oqc)
1431 int i, rc = 0, error = 0;
1432 const struct quotactl_ops *qcop;
1433 struct if_dqinfo *info;
1434 struct if_dqblk *dqblk;
1440 OBD_ALLOC_PTR(info);
1443 OBD_ALLOC_PTR(dqblk);
1449 DQINFO_COPY(info, &oqc->qc_dqinfo);
1450 DQBLK_COPY(dqblk, &oqc->qc_dqblk);
1453 if (oqc->qc_cmd == Q_QUOTAON || oqc->qc_cmd == Q_QUOTAOFF) {
1454 for (i = 0; i < MAXQUOTAS; i++) {
1455 if (!Q_TYPESET(oqc, i))
1458 if (oqc->qc_cmd == Q_QUOTAON) {
1459 char *name[MAXQUOTAS] = LUSTRE_OPQFILES_NAMES_V2;
1461 LASSERT(oqc->qc_id == LUSTRE_QUOTA_V2);
1463 rc = ll_quota_on(sb, i, QFMT_LUSTRE,
1465 } else if (oqc->qc_cmd == Q_QUOTAOFF) {
1466 rc = ll_quota_off(sb, i, 0);
1474 GOTO(out, rc ?: error);
1477 switch (oqc->qc_cmd) {
1480 if (!qcop->get_info)
1481 GOTO(out, rc = -ENOSYS);
1482 rc = qcop->get_info(sb, oqc->qc_type, info);
1486 if (!qcop->set_dqblk)
1487 GOTO(out, rc = -ENOSYS);
1488 rc = qcop->set_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1492 if (!qcop->get_dqblk)
1493 GOTO(out, rc = -ENOSYS);
1494 rc = qcop->get_dqblk(sb, oqc->qc_type, oqc->qc_id, dqblk);
1496 dqblk->dqb_valid = QIF_LIMITS | QIF_USAGE;
1499 if (!sb->s_qcop->quota_sync)
1500 GOTO(out, rc = -ENOSYS);
1501 qcop->quota_sync(sb, oqc->qc_type);
1504 CDEBUG(D_WARNING, "invalidating operational quota files\n");
1505 for (i = 0; i < MAXQUOTAS; i++) {
1507 char *name[MAXQUOTAS] = LUSTRE_OPQFILES_NAMES_V2;
1509 LASSERT(oqc->qc_id == LUSTRE_QUOTA_V2);
1511 if (!Q_TYPESET(oqc, i))
1514 fp = filp_open(name[i], O_CREAT | O_TRUNC | O_RDWR, 0644);
1517 CERROR("error invalidating operational quota file"
1518 " %s (rc:%d)\n", name[i], rc);
1526 CERROR("unsupported quotactl command: %d\n", oqc->qc_cmd);
1530 DQINFO_COPY(&oqc->qc_dqinfo, info);
1531 DQBLK_COPY(&oqc->qc_dqblk, dqblk);
1534 OBD_FREE_PTR(dqblk);
1537 CDEBUG(D_QUOTA, "quotactl command %#x, id %u, type %u "
1539 oqc->qc_cmd, oqc->qc_id, oqc->qc_type, rc);
1544 cfs_hlist_node_t dqb_hash; /** quotacheck hash */
1545 cfs_list_t dqb_list; /** in list also */
1546 qid_t dqb_id; /** uid/gid */
1547 short dqb_type; /** USRQUOTA/GRPQUOTA */
1548 qsize_t dqb_bhardlimit; /** block hard limit */
1549 qsize_t dqb_bsoftlimit; /** block soft limit */
1550 qsize_t dqb_curspace; /** current space */
1551 qsize_t dqb_ihardlimit; /** inode hard limit */
1552 qsize_t dqb_isoftlimit; /** inode soft limit */
1553 qsize_t dqb_curinodes; /** current inodes */
1554 obd_time dqb_btime; /** block grace time */
1555 obd_time dqb_itime; /** inode grace time */
1556 __u32 dqb_valid; /** flag for above fields */
1559 static inline unsigned int chkquot_hash(qid_t id, int type)
1560 __attribute__((__const__));
1562 static inline unsigned int chkquot_hash(qid_t id, int type)
1564 return (id * (MAXQUOTAS - type)) % NR_DQHASH;
1567 static inline struct chk_dqblk *
1568 find_chkquot(cfs_hlist_head_t *head, qid_t id, int type)
1570 cfs_hlist_node_t *node;
1571 struct chk_dqblk *cdqb;
1573 cfs_hlist_for_each(node, head) {
1574 cdqb = cfs_hlist_entry(node, struct chk_dqblk, dqb_hash);
1575 if (cdqb->dqb_id == id && cdqb->dqb_type == type)
1582 static struct chk_dqblk *alloc_chkquot(qid_t id, int type)
1584 struct chk_dqblk *cdqb;
1586 OBD_ALLOC_PTR(cdqb);
1588 CFS_INIT_HLIST_NODE(&cdqb->dqb_hash);
1589 CFS_INIT_LIST_HEAD(&cdqb->dqb_list);
1591 cdqb->dqb_type = type;
1597 static struct chk_dqblk *
1598 cqget(struct super_block *sb, cfs_hlist_head_t *hash,
1599 cfs_list_t *list, qid_t id, int type, int first_check)
1601 cfs_hlist_head_t *head = hash + chkquot_hash(id, type);
1602 struct if_dqblk dqb;
1603 struct chk_dqblk *cdqb;
1606 cdqb = find_chkquot(head, id, type);
1610 cdqb = alloc_chkquot(id, type);
1615 rc = sb->s_qcop->get_dqblk(sb, type, id, &dqb);
1617 CERROR("get_dqblk of id %u, type %d failed: %d\n",
1620 DQBLK_COPY(cdqb, &dqb);
1621 cdqb->dqb_curspace = 0;
1622 cdqb->dqb_curinodes = 0;
1626 cfs_hlist_add_head(&cdqb->dqb_hash, head);
1627 cfs_list_add_tail(&cdqb->dqb_list, list);
1632 static inline int quota_onoff(struct super_block *sb, int cmd, int type, int qfmt)
1634 struct obd_quotactl *oqctl;
1637 OBD_ALLOC_PTR(oqctl);
1641 oqctl->qc_cmd = cmd;
1642 oqctl->qc_id = qfmt;
1643 oqctl->qc_type = type;
1644 rc = fsfilt_ext3_quotactl(sb, oqctl);
1646 OBD_FREE_PTR(oqctl);
1650 static inline int read_old_dqinfo(struct super_block *sb, int type,
1651 struct if_dqinfo *dqinfo)
1653 struct obd_quotactl *oqctl;
1657 OBD_ALLOC_PTR(oqctl);
1661 oqctl->qc_cmd = Q_GETINFO;
1662 oqctl->qc_type = type;
1663 rc = fsfilt_ext3_quotactl(sb, oqctl);
1665 ((struct obd_dqinfo *)dqinfo)[type] = oqctl->qc_dqinfo;
1667 OBD_FREE_PTR(oqctl);
1672 cfs_hlist_head_t qckt_hash[NR_DQHASH]; /* quotacheck hash */
1673 cfs_list_t qckt_list; /* quotacheck list */
1674 int qckt_first_check[MAXQUOTAS]; /* 1 if no old quotafile */
1675 struct if_dqinfo qckt_dqinfo[MAXQUOTAS]; /* old dqinfo */
1678 static int add_inode_quota(struct inode *inode, struct qchk_ctxt *qctxt,
1679 struct obd_quotactl *oqc)
1681 struct chk_dqblk *cdqb[MAXQUOTAS] = { NULL, };
1683 qid_t qid[MAXQUOTAS];
1689 qid[USRQUOTA] = inode->i_uid;
1690 qid[GRPQUOTA] = inode->i_gid;
1692 if (S_ISDIR(inode->i_mode) ||
1693 S_ISREG(inode->i_mode) ||
1694 S_ISLNK(inode->i_mode))
1695 size = inode_get_bytes(inode);
1697 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
1698 if (!Q_TYPESET(oqc, cnt))
1701 cdqb[cnt] = cqget(inode->i_sb, qctxt->qckt_hash,
1702 &qctxt->qckt_list, qid[cnt], cnt,
1703 qctxt->qckt_first_check[cnt]);
1709 cdqb[cnt]->dqb_curspace += size;
1710 cdqb[cnt]->dqb_curinodes++;
1714 for (i = 0; i < cnt; i++) {
1715 if (!Q_TYPESET(oqc, i))
1718 cdqb[i]->dqb_curspace -= size;
1719 cdqb[i]->dqb_curinodes--;
1726 /* write dqinfo struct in a new quota file */
1727 static int v3_write_dqinfo(struct file *f, int type, struct if_dqinfo *info)
1729 struct v2_disk_dqinfo dqinfo;
1730 __u32 blocks = V2_DQTREEOFF + 1;
1731 loff_t offset = V2_DQINFOOFF;
1734 dqinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
1735 dqinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
1736 dqinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK &
1739 dqinfo.dqi_bgrace = cpu_to_le32(MAX_DQ_TIME);
1740 dqinfo.dqi_igrace = cpu_to_le32(MAX_IQ_TIME);
1741 dqinfo.dqi_flags = 0;
1744 dqinfo.dqi_blocks = cpu_to_le32(blocks);
1745 dqinfo.dqi_free_blk = 0;
1746 dqinfo.dqi_free_entry = 0;
1748 return cfs_user_write(f, (char *)&dqinfo, sizeof(dqinfo), &offset);
1751 static int v3_write_dqheader(struct file *f, int type)
1753 static const __u32 quota_magics[] = V2_INITQMAGICS;
1754 static const __u32 quota_versions[] = LUSTRE_INITQVERSIONS_V2;
1755 struct v2_disk_dqheader dqhead;
1758 CLASSERT(ARRAY_SIZE(quota_magics) == ARRAY_SIZE(quota_versions));
1759 LASSERT(0 <= type && type < ARRAY_SIZE(quota_magics));
1761 dqhead.dqh_magic = cpu_to_le32(quota_magics[type]);
1762 dqhead.dqh_version = cpu_to_le32(quota_versions[type]);
1764 return cfs_user_write(f, (char *)&dqhead, sizeof(dqhead), &offset);
1767 static int create_new_quota_files(struct qchk_ctxt *qctxt,
1768 struct obd_quotactl *oqc)
1773 for (i = 0; i < MAXQUOTAS; i++) {
1774 struct if_dqinfo *info = qctxt->qckt_first_check[i]?
1775 NULL : &qctxt->qckt_dqinfo[i];
1777 const char *name[MAXQUOTAS] = LUSTRE_OPQFILES_NAMES_V2;
1779 if (!Q_TYPESET(oqc, i))
1782 LASSERT(oqc->qc_id == LUSTRE_QUOTA_V2);
1784 file = filp_open(name[i], O_RDWR | O_CREAT | O_TRUNC, 0644);
1787 CERROR("can't create %s file: rc = %d\n",
1792 if (!S_ISREG(file->f_dentry->d_inode->i_mode)) {
1793 CERROR("file %s is not regular", name[i]);
1794 filp_close(file, 0);
1795 GOTO(out, rc = -EINVAL);
1798 ll_vfs_dq_drop(file->f_dentry->d_inode);
1800 rc = v3_write_dqheader(file, i);
1802 filp_close(file, 0);
1806 rc = v3_write_dqinfo(file, i, info);
1807 filp_close(file, 0);
1817 static int commit_chkquot(struct super_block *sb, struct qchk_ctxt *qctxt,
1818 struct chk_dqblk *cdqb)
1820 struct obd_quotactl *oqc;
1829 now = cfs_time_current_sec();
1831 if (cdqb->dqb_bsoftlimit &&
1832 toqb(cdqb->dqb_curspace) >= cdqb->dqb_bsoftlimit &&
1835 now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_bgrace;
1837 if (cdqb->dqb_isoftlimit &&
1838 cdqb->dqb_curinodes >= cdqb->dqb_isoftlimit &&
1841 now + qctxt->qckt_dqinfo[cdqb->dqb_type].dqi_igrace;
1843 cdqb->dqb_valid = QIF_ALL;
1845 oqc->qc_cmd = Q_SETQUOTA;
1846 oqc->qc_type = cdqb->dqb_type;
1847 oqc->qc_id = cdqb->dqb_id;
1848 DQBLK_COPY(&oqc->qc_dqblk, cdqb);
1850 rc = fsfilt_ext3_quotactl(sb, oqc);
1855 static int prune_chkquots(struct super_block *sb,
1856 struct qchk_ctxt *qctxt, int error)
1858 struct chk_dqblk *cdqb, *tmp;
1861 cfs_list_for_each_entry_safe(cdqb, tmp, &qctxt->qckt_list, dqb_list) {
1863 rc = commit_chkquot(sb, qctxt, cdqb);
1867 cfs_hlist_del_init(&cdqb->dqb_hash);
1868 cfs_list_del(&cdqb->dqb_list);
1875 #ifndef EXT3_FEATURE_RO_COMPAT_GDT_CSUM
1876 #define EXT3_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
1879 static int fsfilt_ext3_quotacheck(struct super_block *sb,
1880 struct obd_quotactl *oqc)
1882 struct ext3_sb_info *sbi = EXT3_SB(sb);
1883 int i, group, uninit_feat = 0;
1884 struct qchk_ctxt *qctxt;
1885 struct buffer_head *bitmap_bh = NULL;
1886 unsigned long ino, inode_inuse;
1887 struct inode *inode;
1891 /* turn on quota and read dqinfo if existed */
1892 OBD_ALLOC_PTR(qctxt);
1894 oqc->qc_stat = -ENOMEM;
1898 for (i = 0; i < NR_DQHASH; i++)
1899 CFS_INIT_HLIST_HEAD(&qctxt->qckt_hash[i]);
1900 CFS_INIT_LIST_HEAD(&qctxt->qckt_list);
1902 for (i = 0; i < MAXQUOTAS; i++) {
1903 if (!Q_TYPESET(oqc, i))
1906 rc = quota_onoff(sb, Q_QUOTAON, i, oqc->qc_id);
1907 if (!rc || rc == -EBUSY) {
1908 rc = read_old_dqinfo(sb, i, qctxt->qckt_dqinfo);
1911 } else if (rc == -ENOENT || rc == -EINVAL || rc == -EEXIST) {
1912 qctxt->qckt_first_check[i] = 1;
1917 if (EXT3_HAS_RO_COMPAT_FEATURE(sb, EXT3_FEATURE_RO_COMPAT_GDT_CSUM))
1918 /* This filesystem supports the uninit group feature */
1921 /* number of inodes that have been allocated */
1922 inode_inuse = sbi->s_inodes_per_group * sbi->s_groups_count -
1923 percpu_counter_sum(&sbi->s_freeinodes_counter);
1925 /* check quota and update in hash */
1926 for (group = 0; group < sbi->s_groups_count && inode_inuse > 0;
1928 unsigned long used_count = sbi->s_inodes_per_group;
1931 struct ext3_group_desc *desc;
1932 desc = ext3_get_group_desc(sb, group, NULL);
1936 /* we don't really need to take the group lock here,
1937 * but it may be useful if one day we support online
1939 ext4_lock_group(sb, group);
1940 if (desc->bg_flags & cpu_to_le16(EXT3_BG_INODE_UNINIT)) {
1941 /* no inode in use in this group, just skip it */
1942 ext3_unlock_group(sb, group);
1946 used_count -= ext3_itable_unused_count(sb, desc);
1947 ext3_unlock_group(sb, group);
1950 ino = group * sbi->s_inodes_per_group + 1;
1951 bitmap_bh = ext3_read_inode_bitmap(sb, group);
1953 CERROR("%s: ext3_read_inode_bitmap group %d failed\n",
1959 while (i < used_count &&
1960 (i = ext3_find_next_bit(bitmap_bh->b_data,
1961 used_count, i)) < used_count) {
1964 ino = i + group * sbi->s_inodes_per_group;
1965 if (ino < sbi->s_first_ino)
1967 inode = ext3_iget(sb, ino);
1968 if (!inode || IS_ERR(inode))
1971 rc = add_inode_quota(inode, qctxt, oqc);
1981 /* read old quota limits from old quota file. (only for the user
1982 * has limits but hasn't file) */
1983 for (i = 0; i < MAXQUOTAS; i++) {
1985 struct dquot_id *dqid, *tmp;
1987 if (!Q_TYPESET(oqc, i))
1990 if (qctxt->qckt_first_check[i])
1994 LASSERT(sb_dqopt(sb)->files[i] != NULL);
1995 CFS_INIT_LIST_HEAD(&id_list);
1996 rc = lustre_get_qids(NULL, sb_dqopt(sb)->files[i], i, &id_list);
1998 CERROR("read old limits failed. (rc:%d)\n", rc);
2000 cfs_list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
2001 cfs_list_del_init(&dqid->di_link);
2004 cqget(sb, qctxt->qckt_hash, &qctxt->qckt_list,
2006 qctxt->qckt_first_check[i]);
2010 /* turn off quota cause we are to dump chk_dqblk to files */
2011 quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type, oqc->qc_id);
2013 rc = create_new_quota_files(qctxt, oqc);
2017 /* we use vfs functions to set dqblk, so turn quota on */
2018 rc = quota_onoff(sb, Q_QUOTAON, oqc->qc_type, oqc->qc_id);
2020 /* dump and free chk_dqblk */
2021 rc = prune_chkquots(sb, qctxt, rc);
2022 OBD_FREE_PTR(qctxt);
2024 /* turn off quota, `lfs quotacheck` will turn on when all
2025 * nodes quotacheck finish. */
2026 quota_onoff(sb, Q_QUOTAOFF, oqc->qc_type, oqc->qc_id);
2030 CERROR("quotacheck failed: rc = %d\n", rc);
2035 static int fsfilt_ext3_quotainfo(struct lustre_quota_info *lqi, int type,
2041 if (lqi->qi_files[type] == NULL) {
2042 CERROR("operate qinfo before it's enabled!\n");
2048 rc = lustre_check_quota_file(lqi, type);
2051 rc = lustre_read_quota_info(lqi, type);
2054 rc = lustre_write_quota_info(lqi, type);
2056 case QFILE_INIT_INFO:
2057 rc = lustre_init_quota_info(lqi, type);
2061 CERROR("quota CONVERT command is not supported\n");
2065 CERROR("Unsupported admin quota file cmd %d\n"
2066 "Are lquota.ko and fsfilt_ldiskfs.ko modules in sync?\n",
2073 static int fsfilt_ext3_qids(struct file *file, struct inode *inode, int type,
2076 return lustre_get_qids(file, inode, type, list);
2079 static int fsfilt_ext3_dquot(struct lustre_dquot *dquot, int cmd)
2084 if (dquot->dq_info->qi_files[dquot->dq_type] == NULL) {
2085 CERROR("operate dquot before it's enabled!\n");
2090 case QFILE_RD_DQUOT:
2091 rc = lustre_read_dquot(dquot);
2093 case QFILE_WR_DQUOT:
2094 if (dquot->dq_dqb.dqb_ihardlimit ||
2095 dquot->dq_dqb.dqb_isoftlimit ||
2096 dquot->dq_dqb.dqb_bhardlimit ||
2097 dquot->dq_dqb.dqb_bsoftlimit)
2098 cfs_clear_bit(DQ_FAKE_B, &dquot->dq_flags);
2100 cfs_set_bit(DQ_FAKE_B, &dquot->dq_flags);
2102 rc = lustre_commit_dquot(dquot);
2107 CERROR("Unsupported admin quota file cmd %d\n", cmd);
2114 static int fsfilt_ext3_get_mblk(struct super_block *sb, int *count,
2115 struct inode *inode, int frags)
2117 struct ext3_ext_base *base = inode;
2118 /* for an ost_write request, it needs <#fragments> * <tree depth + 1>
2119 * metablocks at maxium b=16542 */
2120 *count = frags * (EXT_DEPTH(base) + 1) * EXT3_BLOCK_SIZE(sb);
2124 lvfs_sbdev_type fsfilt_ext3_journal_sbdev(struct super_block *sb)
2126 return (EXT3_SB(sb)->journal_bdev);
2128 EXPORT_SYMBOL(fsfilt_ext3_journal_sbdev);
2130 ssize_t lustre_read_quota(struct file *f, struct inode *inode, int type,
2131 char *buf, int count, loff_t pos)
2137 CERROR("lustre_read_quota failed for no quota file!\n");
2138 libcfs_debug_dumpstack(NULL);
2142 /* Support for both adm and op quota files must be provided */
2144 rc = fsfilt_ext3_read_record(f, buf, count, &p);
2145 rc = rc < 0 ? rc : p - pos;
2147 struct super_block *sb = inode->i_sb;
2148 rc = sb->s_op->quota_read(sb, type, buf, count, pos);
2153 ssize_t lustre_write_quota(struct file *f, char *buf, int count, loff_t pos)
2158 /* Only adm quota files are supported, op updates are handled by vfs */
2159 rc = fsfilt_ext3_write_record(f, buf, count, &p, 0);
2160 rc = rc < 0 ? rc : p - pos;
2165 void *lustre_quota_journal_start(struct inode *inode, int delete)
2168 unsigned block_count;
2171 /* each indirect block (+4) may become free, attaching to the
2172 * header list of free blocks (+1); the data block (+1) may
2173 * become a free block (+0) or a block with free dqentries (+0) */
2174 block_count = (4 + 1) + 1;
2175 handle = ext3_journal_start(inode,
2176 block_count*EXT3_DATA_TRANS_BLOCKS(inode->i_sb)+2);
2178 /* indirect blocks are touched (+4), each causes file expansion (+0) or
2179 * freeblk reusage with a header update (+1); dqentry is either reused
2180 * causing update of the entry block (+1), prev (+1) and next (+1) or
2181 * a new block allocation (+1) with a header update (+1) */
2182 block_count = (4 + 1) + 3;
2183 handle = ext3_journal_start(inode,
2184 block_count*EXT3_DATA_TRANS_BLOCKS(inode->i_sb)+2);
2191 void lustre_quota_journal_stop(void *handle)
2193 ext3_journal_stop((handle_t *)handle);
2196 static int ll_decode_fh_accept(void *context, struct dentry *de)
2201 #ifdef HAVE_EXPORTFS_DECODE_FH
2202 # define ll_exportfs_decode_fh(mnt, fid, len, type, acceptable, context) \
2203 exportfs_decode_fh(mnt, (struct fid*)(fid), len, type, \
2204 acceptable, context)
2206 # define ll_exportfs_decode_fh(mnt, fid, len, type, acceptable, context) \
2207 export_op_default.decode_fh((mnt)->mnt_sb, &(fid)->ino, len, \
2208 type, acceptable, context)
2209 # define FILEID_INO32_GEN 1
2210 extern struct export_operations export_op_default;
2213 struct dentry *fsfilt_ext3_fid2dentry(struct vfsmount *mnt,
2214 struct fsfilt_fid *fid, int ignore_gen)
2216 struct inode *inode;
2217 struct dentry *result;
2219 result = ll_exportfs_decode_fh(mnt, fid, 2, FILEID_INO32_GEN,
2220 ll_decode_fh_accept, NULL);
2221 if (IS_ERR(result)) {
2222 CDEBUG(D_DENTRY, "%s of %u/%u failed %ld\n", __func__,
2223 fid->ino, fid->gen, PTR_ERR(result));
2227 CDEBUG(D_DENTRY, "%s of %u/%u succeeded\n", __func__,
2228 fid->ino, fid->gen);
2229 inode = result->d_inode;
2233 if (inode->i_nlink == 0 &&
2234 inode->i_mode == 0 && LTIME_S(inode->i_ctime) == 0) {
2235 LCONSOLE_WARN("Found inode with zero nlink, mode and"
2236 " ctime -- this may indicate disk "
2237 "corruption (inode: %lu, link: %lu, "
2238 "count: %d)\n", inode->i_ino,
2239 (unsigned long)inode->i_nlink,
2240 atomic_read(&inode->i_count));
2243 if (fid->gen && inode->i_generation != fid->gen) {
2244 /* we didn't find the right inode.. */
2245 CDEBUG(D_INODE, "found wrong generation: inode %lu, link: %lu, "
2246 "count: %d, generation %u/%u\n",
2247 inode->i_ino, (unsigned long)inode->i_nlink,
2248 atomic_read(&inode->i_count), inode->i_generation,
2256 return ERR_PTR(-ENOENT);
2259 static struct fsfilt_operations fsfilt_ext3_ops = {
2261 .fs_owner = THIS_MODULE,
2262 .fs_getlabel = fsfilt_ext3_get_label,
2263 .fs_setlabel = fsfilt_ext3_set_label,
2264 .fs_uuid = fsfilt_ext3_uuid,
2265 .fs_start = fsfilt_ext3_start,
2266 .fs_brw_start = fsfilt_ext3_brw_start,
2267 .fs_extend = fsfilt_ext3_extend,
2268 .fs_commit = fsfilt_ext3_commit,
2269 .fs_commit_async = fsfilt_ext3_commit_async,
2270 .fs_commit_wait = fsfilt_ext3_commit_wait,
2271 .fs_setattr = fsfilt_ext3_setattr,
2272 .fs_iocontrol = fsfilt_ext3_iocontrol,
2273 .fs_set_md = fsfilt_ext3_set_md,
2274 .fs_get_md = fsfilt_ext3_get_md,
2275 .fs_readpage = fsfilt_ext3_readpage,
2276 .fs_add_journal_cb = fsfilt_ext3_add_journal_cb,
2277 .fs_statfs = fsfilt_ext3_statfs,
2278 .fs_sync = fsfilt_ext3_sync,
2279 .fs_map_inode_pages = fsfilt_ext3_map_inode_pages,
2280 .fs_write_record = fsfilt_ext3_write_record,
2281 .fs_read_record = fsfilt_ext3_read_record,
2282 .fs_setup = fsfilt_ext3_setup,
2283 .fs_send_bio = fsfilt_ext3_send_bio,
2284 .fs_get_op_len = fsfilt_ext3_get_op_len,
2285 #ifdef HAVE_DISK_INODE_VERSION
2286 .fs_get_version = fsfilt_ext3_get_version,
2287 .fs_set_version = fsfilt_ext3_set_version,
2289 .fs_quotactl = fsfilt_ext3_quotactl,
2290 .fs_quotacheck = fsfilt_ext3_quotacheck,
2291 .fs_quotainfo = fsfilt_ext3_quotainfo,
2292 .fs_qids = fsfilt_ext3_qids,
2293 .fs_dquot = fsfilt_ext3_dquot,
2294 .fs_get_mblk = fsfilt_ext3_get_mblk,
2295 .fs_journal_sbdev = fsfilt_ext3_journal_sbdev,
2296 .fs_fid2dentry = fsfilt_ext3_fid2dentry,
2299 static int __init fsfilt_ext3_init(void)
2303 fcb_cache = cfs_mem_cache_create("fsfilt_ext3_fcb",
2304 sizeof(struct fsfilt_cb_data), 0, 0);
2306 CERROR("error allocating fsfilt journal callback cache\n");
2307 GOTO(out, rc = -ENOMEM);
2310 rc = fsfilt_register_ops(&fsfilt_ext3_ops);
2313 int err = cfs_mem_cache_destroy(fcb_cache);
2314 LASSERTF(err == 0, "error destroying new cache: rc %d\n", err);
2320 static void __exit fsfilt_ext3_exit(void)
2324 fsfilt_unregister_ops(&fsfilt_ext3_ops);
2325 rc = cfs_mem_cache_destroy(fcb_cache);
2326 LASSERTF(rc == 0, "couldn't destroy fcb_cache slab\n");
2329 module_init(fsfilt_ext3_init);
2330 module_exit(fsfilt_ext3_exit);
2332 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2333 MODULE_DESCRIPTION("Lustre ext3 Filesystem Helper v0.1");
2334 MODULE_LICENSE("GPL");