diff options
| author | Mark Fasheh <mark.fasheh@oracle.com> | 2007-01-21 14:44:59 -0800 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2007-01-21 16:20:10 -0800 |
| commit | 50af94b14c98f5769860a282a397c6f3b135c8a8 (patch) | |
| tree | 214c93dc04fd9d78341c7dfa57aac6af4b8edab9 | |
| parent | 6a1bd4a5788435b6ef1664383604b43607eb825a (diff) | |
ocfs2: Add backup superblock info to ocfs2_fs.h
This synchronizes us with recent ocfs2-tools changes.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
| -rw-r--r-- | fs/ocfs2/ocfs2_fs.h | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index b5c68567077..c99e9058c19 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -85,7 +85,7 @@ #define OCFS2_CLEAR_INCOMPAT_FEATURE(sb,mask) \ OCFS2_SB(sb)->s_feature_incompat &= ~(mask) -#define OCFS2_FEATURE_COMPAT_SUPP 0 +#define OCFS2_FEATURE_COMPAT_SUPP OCFS2_FEATURE_COMPAT_BACKUP_SB #define OCFS2_FEATURE_INCOMPAT_SUPP OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT #define OCFS2_FEATURE_RO_COMPAT_SUPP 0 @@ -110,6 +110,20 @@ #define OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC 0x0010 /* + * backup superblock flag is used to indicate that this volume + * has backup superblocks. + */ +#define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001 + +/* The byte offset of the first backup block will be 1G. + * The following will be 4G, 16G, 64G, 256G and 1T. + */ +#define OCFS2_BACKUP_SB_START 1 << 30 + +/* the max backup superblock nums */ +#define OCFS2_MAX_BACKUP_SUPERBLOCKS 6 + +/* * Flags on ocfs2_dinode.i_flags */ #define OCFS2_VALID_FL (0x00000001) /* Inode is valid */ @@ -566,6 +580,20 @@ static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb) return size / sizeof(struct ocfs2_truncate_rec); } + +static inline u64 ocfs2_backup_super_blkno(struct super_block *sb, int index) +{ + u64 offset = OCFS2_BACKUP_SB_START; + + if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) { + offset <<= (2 * index); + offset /= sb->s_blocksize; + return offset; + } + + return 0; + +} #else static inline int ocfs2_fast_symlink_chars(int blocksize) { @@ -631,6 +659,19 @@ static inline int ocfs2_truncate_recs_per_inode(int blocksize) return size / sizeof(struct ocfs2_truncate_rec); } + +static inline uint64_t ocfs2_backup_super_blkno(int blocksize, int index) +{ + uint64_t offset = OCFS2_BACKUP_SB_START; + + if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) { + offset <<= (2 * index); + offset /= blocksize; + return offset; + } + + return 0; +} #endif /* __KERNEL__ */ |