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| author | Tao Ma <tao.ma@oracle.com> | 2009-08-11 14:33:14 +0800 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2009-09-22 20:09:33 -0700 |
| commit | e73a819db9c2d6c4065b7cab7374709b6939e8f1 (patch) | |
| tree | 40968bc5b37d3b55e382267683c9612d4697f036 /fs/ocfs2/ocfs2_fs.h | |
| parent | e2e9f6082b5ff099978774d5c0148e062344c2f9 (diff) | |
| download | lwn-e73a819db9c2d6c4065b7cab7374709b6939e8f1.tar.gz lwn-e73a819db9c2d6c4065b7cab7374709b6939e8f1.zip | |
ocfs2: Add support for incrementing refcount in the tree.
Given a physical cpos and length, increment the refcount
in the tree. If the extent has not been seen before, a refcount
record is created for it. Refcount records may be merged or
split by this operation.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to 'fs/ocfs2/ocfs2_fs.h')
| -rw-r--r-- | fs/ocfs2/ocfs2_fs.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index e4288b446ec0..40072cdef7b6 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -916,6 +916,7 @@ struct ocfs2_refcount_rec { __le32 r_refcount; /* Reference count of this extent */ /*10*/ }; +#define OCFS2_32BIT_POS_MASK (0xffffffffULL) #define OCFS2_REFCOUNT_LEAF_FL (0x00000001) #define OCFS2_REFCOUNT_TREE_FL (0x00000002) @@ -1394,6 +1395,12 @@ static inline u16 ocfs2_refcount_recs_per_rb(struct super_block *sb) return size / sizeof(struct ocfs2_refcount_rec); } + +static inline u32 +ocfs2_get_ref_rec_low_cpos(const struct ocfs2_refcount_rec *rec) +{ + return le64_to_cpu(rec->r_cpos) & OCFS2_32BIT_POS_MASK; +} #else static inline int ocfs2_fast_symlink_chars(int blocksize) { |