File: [Development] / xfs-linux / xfs_bmap.h (download)
Revision 1.21, Thu Feb 10 21:12:48 1994 UTC (23 years, 8 months ago) by doucette
Branch: MAIN
Changes since 1.20: +16 -8
lines
Change flist variables to be local structures instead of pointers,
since they now contain a count and pointer to the items instead of just
the pointer.
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#ifndef _FS_XFS_BMAP_H
#define _FS_XFS_BMAP_H
#ident "$Revision$"
/*
* List of extents to be free "later".
* The list is kept sorted on xbf_startblock.
*/
typedef struct xfs_bmap_free_item
{
xfs_fsblock_t xbfi_startblock;/* starting fs block number */
xfs_extlen_t xbfi_blockcount;/* number of blocks in extent */
struct xfs_bmap_free_item *xbfi_next; /* link to next entry */
} xfs_bmap_free_item_t;
/*
* Header for free extent list.
*/
typedef struct xfs_bmap_free
{
xfs_bmap_free_item_t *xbf_first;
int xbf_count;
} xfs_bmap_free_t;
#define XFS_BMAP_MAX_NMAP 4
/*
* Flags for xfs_bmapi
*/
#define XFS_BMAPI_WRITE 0x1 /* write operation: allocate space */
#define XFS_BMAPI_DELAY 0x2 /* delayed write operation */
#define XFS_BMAPI_ENTIRE 0x4 /* return entire extent, not trimmed */
/*
* Add the extent to the list of extents to be free at transaction end.
*/
void
xfs_bmap_add_free(
xfs_fsblock_t bno, /* fs block number of extent */
xfs_extlen_t len, /* length of extent */
xfs_bmap_free_t *flist); /* list of extents */
void
xfs_bmap_finish(
xfs_trans_t **tp, /* transaction pointer addr */
xfs_bmap_free_t *flist, /* i/o: list extents to free */
xfs_fsblock_t firstblock); /* controlled a.g. for allocs */
void
xfs_bmap_read_extents(
xfs_trans_t *tp, /* transaction pointer */
struct xfs_inode *ip); /* incore inode */
xfs_fsblock_t /* first allocated block */
xfs_bmapi(
xfs_trans_t *tp, /* transaction pointer */
struct xfs_inode *ip, /* incore inode */
xfs_fsblock_t bno, /* starting file offs. mapped */
xfs_extlen_t len, /* length to map in file */
int flags, /* XFS_BMAPI_... */
xfs_fsblock_t firstblock, /* controls a.g. for allocs */
xfs_extlen_t total, /* total blocks needed */
xfs_bmbt_irec_t *mval, /* output: map values */
int *nmap, /* i/o: mval size/count */
xfs_bmap_free_t *flist); /* i/o: list extents to free */
xfs_fsblock_t /* first allocated block */
xfs_bunmapi(
xfs_trans_t *tp, /* transaction pointer */
struct xfs_inode *ip, /* incore inode */
xfs_fsblock_t bno, /* starting offset to unmap */
xfs_extlen_t len, /* length to unmap in file */
xfs_fsblock_t firstblock, /* controls a.g. for allocs */
xfs_bmap_free_t *flist); /* i/o: list extents to free */
#endif /* _FS_XFS_BMAP_H */