diff options
| -rw-r--r-- | fs/ocfs2/Makefile | 1 | ||||
| -rw-r--r-- | fs/ocfs2/cluster/masklog.c | 1 | ||||
| -rw-r--r-- | fs/ocfs2/cluster/masklog.h | 1 | ||||
| -rw-r--r-- | fs/ocfs2/ocfs2.h | 3 | ||||
| -rw-r--r-- | fs/ocfs2/refcounttree.c | 99 |
5 files changed, 105 insertions, 0 deletions
diff --git a/fs/ocfs2/Makefile b/fs/ocfs2/Makefile index 01596079dd63..31f25ce32c97 100644 --- a/fs/ocfs2/Makefile +++ b/fs/ocfs2/Makefile @@ -28,6 +28,7 @@ ocfs2-objs := \ locks.o \ mmap.o \ namei.o \ + refcounttree.o \ resize.o \ slot_map.o \ suballoc.o \ diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c index 96df5416993e..1cd2934de615 100644 --- a/fs/ocfs2/cluster/masklog.c +++ b/fs/ocfs2/cluster/masklog.c @@ -111,6 +111,7 @@ static struct mlog_attribute mlog_attrs[MLOG_MAX_BITS] = { define_mask(EXPORT), define_mask(XATTR), define_mask(QUOTA), + define_mask(REFCOUNT), define_mask(ERROR), define_mask(NOTICE), define_mask(KTHREAD), diff --git a/fs/ocfs2/cluster/masklog.h b/fs/ocfs2/cluster/masklog.h index 696c32e50716..9b4d11726cf2 100644 --- a/fs/ocfs2/cluster/masklog.h +++ b/fs/ocfs2/cluster/masklog.h @@ -113,6 +113,7 @@ #define ML_EXPORT 0x0000000010000000ULL /* ocfs2 export operations */ #define ML_XATTR 0x0000000020000000ULL /* ocfs2 extended attributes */ #define ML_QUOTA 0x0000000040000000ULL /* ocfs2 quota operations */ +#define ML_REFCOUNT 0x0000000080000000ULL /* refcount tree operations */ /* bits that are infrequently given and frequently matched in the high word */ #define ML_ERROR 0x0000000100000000ULL /* sent to KERN_ERR */ #define ML_NOTICE 0x0000000200000000ULL /* setn to KERN_NOTICE */ diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index d370262b3621..6688d19e4451 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -610,6 +610,9 @@ static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb) #define OCFS2_IS_VALID_DX_LEAF(ptr) \ (!strcmp((ptr)->dl_signature, OCFS2_DX_LEAF_SIGNATURE)) +#define OCFS2_IS_VALID_REFCOUNT_BLOCK(ptr) \ + (!strcmp((ptr)->rf_signature, OCFS2_REFCOUNT_BLOCK_SIGNATURE)) + static inline unsigned long ino_from_blkno(struct super_block *sb, u64 blkno) { diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c new file mode 100644 index 000000000000..a923535d9c37 --- /dev/null +++ b/fs/ocfs2/refcounttree.c @@ -0,0 +1,99 @@ +/* -*- mode: c; c-basic-offset: 8; -*- + * vim: noexpandtab sw=8 ts=8 sts=0: + * + * refcounttree.c + * + * Copyright (C) 2009 Oracle. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#define MLOG_MASK_PREFIX ML_REFCOUNT +#include <cluster/masklog.h> +#include "ocfs2.h" +#include "inode.h" +#include "alloc.h" +#include "suballoc.h" +#include "journal.h" +#include "uptodate.h" +#include "super.h" +#include "buffer_head_io.h" +#include "blockcheck.h" + +static int ocfs2_validate_refcount_block(struct super_block *sb, + struct buffer_head *bh) +{ + int rc; + struct ocfs2_refcount_block *rb = + (struct ocfs2_refcount_block *)bh->b_data; + + mlog(0, "Validating refcount block %llu\n", + (unsigned long long)bh->b_blocknr); + + BUG_ON(!buffer_uptodate(bh)); + + /* + * If the ecc fails, we return the error but otherwise + * leave the filesystem running. We know any error is + * local to this block. + */ + rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &rb->rf_check); + if (rc) { + mlog(ML_ERROR, "Checksum failed for refcount block %llu\n", + (unsigned long long)bh->b_blocknr); + return rc; + } + + + if (!OCFS2_IS_VALID_REFCOUNT_BLOCK(rb)) { + ocfs2_error(sb, + "Refcount block #%llu has bad signature %.*s", + (unsigned long long)bh->b_blocknr, 7, + rb->rf_signature); + return -EINVAL; + } + + if (le64_to_cpu(rb->rf_blkno) != bh->b_blocknr) { + ocfs2_error(sb, + "Refcount block #%llu has an invalid rf_blkno " + "of %llu", + (unsigned long long)bh->b_blocknr, + (unsigned long long)le64_to_cpu(rb->rf_blkno)); + return -EINVAL; + } + + if (le32_to_cpu(rb->rf_fs_generation) != OCFS2_SB(sb)->fs_generation) { + ocfs2_error(sb, + "Refcount block #%llu has an invalid " + "rf_fs_generation of #%u", + (unsigned long long)bh->b_blocknr, + le32_to_cpu(rb->rf_fs_generation)); + return -EINVAL; + } + + return 0; +} + +static int ocfs2_read_refcount_block(struct ocfs2_caching_info *ci, + u64 rb_blkno, + struct buffer_head **bh) +{ + int rc; + struct buffer_head *tmp = *bh; + + rc = ocfs2_read_block(ci, rb_blkno, &tmp, + ocfs2_validate_refcount_block); + + /* If ocfs2_read_block() got us a new bh, pass it up. */ + if (!rc && !*bh) + *bh = tmp; + + return rc; +} |