| /* |
| * 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 */ |
| |
| /* |
| * Useful inode bits for this kernel. |
| * Used in some places where having 64-bits in the 32-bit kernels |
| * costs too much. |
| */ |
| #if XFS_BIG_INUMS |
| typedef xfs_ino_t xfs_intino_t; |
| #else |
| typedef __uint32_t xfs_intino_t; |
| #endif |
| |
| #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__ */ |