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- /*
- * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
- #ifndef __XFS_INUM_H__
- #define __XFS_INUM_H__
- /*
- * Inode number format:
- * low inopblog bits - offset in block
- * next agblklog bits - block number in ag
- * next agno_log bits - ag number
- * high agno_log-agblklog-inopblog bits - 0
- */
- typedef __uint32_t xfs_agino_t; /* within allocation grp inode number */
- #define NULLFSINO ((xfs_ino_t)-1)
- #define NULLAGINO ((xfs_agino_t)-1)
- struct xfs_mount;
- #define XFS_INO_MASK(k) (__uint32_t)((1ULL << (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) (mp)->m_agino_log
- #define XFS_INO_AGNO_BITS(mp) (mp)->m_agno_log
- #define XFS_INO_BITS(mp) \
- XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp)
- #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)))
- #if XFS_BIG_INUMS
- #define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 56) - 1ULL))
- #else
- #define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 32) - 1ULL))
- #endif
- #define XFS_MAXINUMBER_32 ((xfs_ino_t)((1ULL << 32) - 1ULL))
- #endif /* __XFS_INUM_H__ */
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