File: [Development] / xfs-linux-nodel / xfs_bmap.h (download)
Revision 1.10, Thu Dec 9 01:39:55 1993 UTC (23 years, 10 months ago) by doucette
Branch: MAIN
Changes since 1.9: +9 -1
lines
Add mp argument to xfs_bmapi. Add xfs_bmbt_[gs]et_all macros.
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#ifndef _FS_XFS_BMAP_H
#define _FS_XFS_BMAP_H
#ident "$Revision: 1.6 $"
#define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */
/*
* Bmap btree record and extent descriptor.
*/
typedef struct xfs_bmbt_rec
{
__uint32_t l0, l1, l2, l3;
} xfs_bmbt_rec_t;
/*
* l0:0-31 and l1:9-31 are startoff.
* l1:0-8, l2:0-31, and l3:21-31 are startblock.
* l3:0-20 are blockcount.
*/
#define xfs_bmbt_get_startoff(r) \
((((xfs_fsblock_t)((r)->l0)) << 23) | \
(((xfs_fsblock_t)((r)->l1)) >> 9))
#define xfs_bmbt_get_startblock(r) \
((((xfs_fsblock_t)((r)->l1 & 0x000001ff)) << 43) | \
(((xfs_fsblock_t)((r)->l2)) << 11) | \
(((xfs_fsblock_t)((r)->l3)) >> 21))
#define xfs_bmbt_get_blockcount(r) \
((xfs_extlen_t)((r)->l3 & 0x001fffff))
#define xfs_bmbt_get_all(r,s) \
(((s).br_startoff = xfs_bmbt_get_startoff(r)), \
((s).br_startblock = xfs_bmbt_get_startblock(r)), \
((s).br_blockcount = xfs_bmbt_get_blockcount(r)))
#define xfs_bmbt_set_startoff(r,v) \
((r)->l0 = (__uint32_t)((v) >> 23), \
(r)->l1 = ((r)->l1 & 0x000001ff) | ((__uint32_t)(v) & 0x007fffff))
#define xfs_bmbt_set_startblock(r,v) \
((r)->l1 = ((r)->l1 & 0xfffffe00) | (__uint32_t)((v) >> 43), \
(r)->l2 = (__uint32_t)((v) >> 11), \
(r)->l3 = ((r)->l3 & 0x001fffff) | ((__uint32_t)(v) & 0x000007ff))
#define xfs_bmbt_set_blockcount(r,v) \
((r)->l3 = ((r)->l3 & 0xffe00000) | ((__uint32_t)(v) & 0x001fffff))
#define xfs_bmbt_set_all(r,s) \
(xfs_bmbt_set_startoff(r, (s).br_startoff), \
xfs_bmbt_set_startblock(r, (s).br_startblock), \
xfs_bmbt_set_blockcount(r, (s).br_blockcount))
/*
* Incore version of above.
*/
typedef struct xfs_bmbt_irec
{
xfs_fsblock_t br_startoff; /* starting file offset */
xfs_fsblock_t br_startblock; /* starting block number */
xfs_extlen_t br_blockcount; /* number of block */
} xfs_bmbt_irec_t;
#define XFS_BMAP_RBLOCK_DSIZE(lev,cur) ((cur)->bc_private.b.inodesize - (int)offsetof(xfs_dinode_t, di_u))
#define XFS_BMAP_RBLOCK_ISIZE(lev,cur) ((int)(cur)->bc_private.b.ip->i_broot_bytes)
#define XFS_BMAP_IBLOCK_SIZE(lev,cur) (1 << (cur)->bc_blocklog)
#define XFS_BMAP_BLOCK_DSIZE(lev,cur) ((lev) == (cur)->bc_nlevels - 1 ? XFS_BMAP_RBLOCK_DSIZE(lev,cur) : XFS_BMAP_IBLOCK_SIZE(lev,cur))
#define XFS_BMAP_BLOCK_ISIZE(lev,cur) ((lev) == (cur)->bc_nlevels - 1 ? XFS_BMAP_RBLOCK_ISIZE(lev,cur) : XFS_BMAP_IBLOCK_SIZE(lev,cur))
#define XFS_BMAP_BLOCK_DMAXRECS(lev,cur) XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_BLOCK_DSIZE(lev,cur), xfs_bmbt_rec_t, lev)
#define XFS_BMAP_BLOCK_IMAXRECS(lev,cur) XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_BLOCK_ISIZE(lev,cur), xfs_bmbt_rec_t, lev)
#define XFS_BMAP_BLOCK_DMINRECS(lev,cur) XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_BLOCK_DSIZE(lev,cur), xfs_bmbt_rec_t, lev)
#define XFS_BMAP_BLOCK_IMINRECS(lev,cur) XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_BLOCK_ISIZE(lev,cur), xfs_bmbt_rec_t, lev)
#define XFS_BMAP_REC_DADDR(bb,i,cur) XFS_BTREE_REC_ADDR(XFS_BMAP_BLOCK_DSIZE((bb)->bb_level,cur), xfs_bmbt_rec_t, bb, i)
#define XFS_BMAP_REC_IADDR(bb,i,cur) XFS_BTREE_REC_ADDR(XFS_BMAP_BLOCK_ISIZE((bb)->bb_level,cur), xfs_bmbt_rec_t, bb, i)
#define XFS_BMAP_PTR_DADDR(bb,i,cur) XFS_BTREE_PTR_ADDR(XFS_BMAP_BLOCK_DSIZE((bb)->bb_level,cur), xfs_bmbt_rec_t, bb, i)
#define XFS_BMAP_PTR_IADDR(bb,i,cur) XFS_BTREE_PTR_ADDR(XFS_BMAP_BLOCK_ISIZE((bb)->bb_level,cur), xfs_bmbt_rec_t, bb, i)
/*
* These are to be used when we know the size of the block and
* we don't have a cursor.
*/
#define XFS_BMAP_BROOT_SIZE(isz) ((isz) - offsetof(xfs_dinode_t, di_u))
#define XFS_BMAP_BROOT_REC_ADDR(bb,i,isz) XFS_BTREE_REC_ADDR(isz,xfs_bmbt_rec_t,bb,i)
#define XFS_BMAP_BROOT_PTR_ADDR(bb,i,isz) XFS_BTREE_ROOT_PTR_ADDR(isz,xfs_bmbt_rec_t,bb,i)
#define XFS_BMAP_BROOT_NUMRECS(bb) ((bb)->bb_numrecs)
#define XFS_BMAP_BROOT_MAXRECS(sz) XFS_BTREE_BLOCK_MAXRECS(sz,xfs_bmbt_rec_t,1)
#define XFS_BMAP_BROOT_SPACE(bb) ((int)(sizeof(xfs_btree_block_t) + ((bb)->bb_numrecs * (sizeof(xfs_bmbt_rec_t) + sizeof(xfs_agblock_t)))))
#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) ((int)(sizeof(xfs_btree_block_t) + ((nrecs) * (sizeof(xfs_bmbt_rec_t) + sizeof(xfs_agblock_t)))))
#define XFS_BMAP_MAXLEVELS 5 /* ??? */
#define xfs_bmbt_get_block(cur, level, bpp) \
((level) < (cur)->bc_nlevels - 1 ? \
((*bpp = (cur)->bc_bufs[level]), xfs_buf_to_block(*bpp)) : \
((*bpp = 0), (cur)->bc_private.b.ip->i_broot))
void xfs_bmapi(xfs_mount_t *, xfs_trans_t *, struct xfs_inode *, xfs_fsblock_t, xfs_extlen_t, int, xfs_bmbt_irec_t *, int *);
#endif /* _FS_XFS_BMAP_H */