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xfs: support bmapping delalloc extents in the CoW fork

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Allow the creation of delayed allocation extents in the CoW fork.  In
a subsequent patch we'll wire up iomap_begin to actually do this via
reflink helper functions.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong
2016-10-03 09:11:32 -07:00
parent 3993baeb3c
commit be51f8119c
4 changed files with 16 additions and 11 deletions
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7
fs/xfs/libxfs/xfs_bmap.h
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@@ -234,9 +234,10 @@ struct xfs_bmbt_rec_host *
xfs_bmap_search_extents(struct xfs_inode *ip, xfs_fileoff_t bno,
int fork, int *eofp, xfs_extnum_t *lastxp,
struct xfs_bmbt_irec *gotp, struct xfs_bmbt_irec *prevp);
int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, xfs_fileoff_t aoff,
xfs_filblks_t len, struct xfs_bmbt_irec *got,
struct xfs_bmbt_irec *prev, xfs_extnum_t *lastx, int eof);
int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
xfs_fileoff_t aoff, xfs_filblks_t len,
struct xfs_bmbt_irec *got, struct xfs_bmbt_irec *prev,
xfs_extnum_t *lastx, int eof);
enum xfs_bmap_intent_type {
XFS_BMAP_MAP = 1,