File: [Development] / linux-2.6-xfs / fs / xfs / xfs_inum.h (download)
Revision 1.7, Tue Apr 12 01:16:45 1994 UTC (23 years, 6 months ago) by doucette
Branch: MAIN
Changes since 1.6: +23 -21
lines
Split xfs_fsblock_t into multiple types.
Use mp instead of sbp in all the address macros.
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#ifndef _FS_XFS_INUM_H
#define _FS_XFS_INUM_H
#ident "$Revision$"
/*
* Inode number format:
* low inopblog bits - offset in block
* next agblklog bits - block number in ag
* next 32 bits - ag number
* high 32-agblklog-inopblog bits - 0
*/
typedef __uint64_t xfs_ino_t; /* inode number */
typedef __uint32_t xfs_agino_t; /* within allocation grp inode number */
#define NULLFSINO ((xfs_ino_t)-1)
#define NULLAGINO ((xfs_agino_t)-1)
#define NULLAGINO_ALLOC ((xfs_agino_t)0)
#define xfs_ino_mask(k) ((1 << (k)) - 1)
#define xfs_ino_offset_bits(mp) ((mp)->m_sb.sb_inopblog)
#define xfs_ino_agbno_bits(mp) ((mp)->m_sb.sb_agblklog)
#define xfs_ino_agino_bits(mp) \
(xfs_ino_offset_bits(mp) + xfs_ino_agbno_bits(mp))
#define xfs_ino_agno_bits(mp) 32
#define xfs_ino_to_agno(mp,i) \
((xfs_agnumber_t)((i) >> xfs_ino_agino_bits(mp)))
#define xfs_ino_to_agino(mp,i) \
((xfs_agino_t)(i) & xfs_ino_mask(xfs_ino_agino_bits(mp)))
#define xfs_ino_to_agbno(mp,i) \
(((xfs_agblock_t)(i) >> xfs_ino_offset_bits(mp)) & \
xfs_ino_mask(xfs_ino_agbno_bits(mp)))
#define xfs_ino_to_offset(mp,i) \
((int)(i) & xfs_ino_mask(xfs_ino_offset_bits(mp)))
#define xfs_ino_to_fsb(mp,i) \
xfs_agb_to_fsb(mp, xfs_ino_to_agno(mp,i), xfs_ino_to_agbno(mp,i))
#define xfs_agino_to_ino(mp,a,i) \
(((xfs_ino_t)(a) << xfs_ino_agino_bits(mp)) | (i))
#define xfs_agino_to_agbno(mp,i) ((i) >> xfs_ino_offset_bits(mp))
#define xfs_agino_to_offset(mp,i) \
((i) & xfs_ino_mask(xfs_ino_offset_bits(mp)))
#define xfs_offbno_to_agino(mp,b,o) \
((xfs_agino_t)(((b) << xfs_ino_offset_bits(mp)) | (o)))
#endif /* !_FS_XFS_INUM_H */