diff options
| author | Namjae Jeon | 2015-03-25 15:08:56 +1100 |
|---|---|---|
| committer | Dave Chinner | 2015-03-25 15:08:56 +1100 |
| commit | a904b1ca5751faf5ece8600e18cd3b674afcca1b (patch) | |
| tree | 2b757182d3b07c4df47b45571f579cb93af8bc9b /fs/xfs/libxfs/xfs_bmap.h | |
| parent | dd46c787788d5bf5b974729d43e4c405814a4c7d (diff) | |
xfs: Add support FALLOC_FL_INSERT_RANGE for fallocate
This patch implements fallocate's FALLOC_FL_INSERT_RANGE for XFS.
1) Make sure that both offset and len are block size aligned.
2) Update the i_size of inode by len bytes.
3) Compute the file's logical block number against offset. If the computed
block number is not the starting block of the extent, split the extent
such that the block number is the starting block of the extent.
4) Shift all the extents which are lying bewteen [offset, last allocated extent]
towards right by len bytes. This step will make a hole of len bytes
at offset.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h index b9d8a499d2c4..6aaa0c1c7200 100644 --- a/fs/xfs/libxfs/xfs_bmap.h +++ b/fs/xfs/libxfs/xfs_bmap.h @@ -166,6 +166,11 @@ static inline void xfs_bmap_init(xfs_bmap_free_t *flp, xfs_fsblock_t *fbp) */ #define XFS_BMAP_MAX_SHIFT_EXTENTS 1 +enum shift_direction { + SHIFT_LEFT = 0, + SHIFT_RIGHT, +}; + #ifdef DEBUG void xfs_bmap_trace_exlist(struct xfs_inode *ip, xfs_extnum_t cnt, int whichfork, unsigned long caller_ip); @@ -211,8 +216,10 @@ int xfs_check_nostate_extents(struct xfs_ifork *ifp, xfs_extnum_t idx, xfs_extnum_t num); uint xfs_default_attroffset(struct xfs_inode *ip); int xfs_bmap_shift_extents(struct xfs_trans *tp, struct xfs_inode *ip, - xfs_fileoff_t start_fsb, xfs_fileoff_t offset_shift_fsb, - int *done, xfs_fileoff_t *next_fsb, xfs_fsblock_t *firstblock, - struct xfs_bmap_free *flist, int num_exts); + xfs_fileoff_t *next_fsb, xfs_fileoff_t offset_shift_fsb, + int *done, xfs_fileoff_t stop_fsb, xfs_fsblock_t *firstblock, + struct xfs_bmap_free *flist, enum shift_direction direction, + int num_exts); +int xfs_bmap_split_extent(struct xfs_inode *ip, xfs_fileoff_t split_offset); #endif /* __XFS_BMAP_H__ */ |