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linux/fs/xfs/xfs_ialloc_btree.h
Christoph Hellwig 48fab6bf5f [XFS] add XFS_INOBT_IS_FREE_DISK 
SGI-PV: 928382
SGI-Modid: xfs-linux:xfs-kern:193778a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-06-21 15:40:20 +10:00

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/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 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.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#ifndef __XFS_IALLOC_BTREE_H__
#define __XFS_IALLOC_BTREE_H__
/*
* Inode map on-disk structures
*/
struct xfs_buf;
struct xfs_btree_cur;
struct xfs_btree_sblock;
struct xfs_mount;
/*
* There is a btree for the inode map per allocation group.
*/
#define XFS_IBT_MAGIC 0x49414254 /* 'IABT' */
typedef __uint64_t xfs_inofree_t;
#define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t))
#define XFS_INODES_PER_CHUNK_LOG (XFS_NBBYLOG + 3)
#define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1)
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_MASKN)
xfs_inofree_t xfs_inobt_maskn(int i, int n);
#define XFS_INOBT_MASKN(i,n) xfs_inobt_maskn(i,n)
#else
#define XFS_INOBT_MASKN(i,n) \
((((n) >= XFS_INODES_PER_CHUNK ? \
(xfs_inofree_t)0 : ((xfs_inofree_t)1 << (n))) - 1) << (i))
#endif
/*
* Data record structure
*/
typedef struct xfs_inobt_rec
{
xfs_agino_t ir_startino; /* starting inode number */
__int32_t ir_freecount; /* count of free inodes (set bits) */
xfs_inofree_t ir_free; /* free inode mask */
} xfs_inobt_rec_t;
/*
* Key structure
*/
typedef struct xfs_inobt_key
{
xfs_agino_t ir_startino; /* starting inode number */
} xfs_inobt_key_t;
typedef xfs_agblock_t xfs_inobt_ptr_t; /* btree pointer type */
/* btree block header type */
typedef struct xfs_btree_sblock xfs_inobt_block_t;
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_INOBT_BLOCK)
xfs_inobt_block_t *xfs_buf_to_inobt_block(struct xfs_buf *bp);
#define XFS_BUF_TO_INOBT_BLOCK(bp) xfs_buf_to_inobt_block(bp)
#else
#define XFS_BUF_TO_INOBT_BLOCK(bp) ((xfs_inobt_block_t *)(XFS_BUF_PTR(bp)))
#endif
/*
* Bit manipulations for ir_free.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_MASK)
xfs_inofree_t xfs_inobt_mask(int i);
#define XFS_INOBT_MASK(i) xfs_inobt_mask(i)
#else
#define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_IS_FREE)
int xfs_inobt_is_free(xfs_inobt_rec_t *rp, int i);
#define XFS_INOBT_IS_FREE(rp,i) xfs_inobt_is_free(rp,i)
#define XFS_INOBT_IS_FREE_DISK(rp,i) xfs_inobt_is_free_disk(rp,i)
#else
#define XFS_INOBT_IS_FREE(rp,i) \
(((rp)->ir_free & XFS_INOBT_MASK(i)) != 0)
#define XFS_INOBT_IS_FREE_DISK(rp,i) \
((INT_GET((rp)->ir_free, ARCH_CONVERT) & XFS_INOBT_MASK(i)) != 0)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_SET_FREE)
void xfs_inobt_set_free(xfs_inobt_rec_t *rp, int i);
#define XFS_INOBT_SET_FREE(rp,i) xfs_inobt_set_free(rp,i)
#else
#define XFS_INOBT_SET_FREE(rp,i) ((rp)->ir_free |= XFS_INOBT_MASK(i))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_CLR_FREE)
void xfs_inobt_clr_free(xfs_inobt_rec_t *rp, int i);
#define XFS_INOBT_CLR_FREE(rp,i) xfs_inobt_clr_free(rp,i)
#else
#define XFS_INOBT_CLR_FREE(rp,i) ((rp)->ir_free &= ~XFS_INOBT_MASK(i))
#endif
/*
* Real block structures have a size equal to the disk block size.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_BLOCK_SIZE)
int xfs_inobt_block_size(int lev, struct xfs_btree_cur *cur);
#define XFS_INOBT_BLOCK_SIZE(lev,cur) xfs_inobt_block_size(lev,cur)
#else
#define XFS_INOBT_BLOCK_SIZE(lev,cur) (1 << (cur)->bc_blocklog)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_BLOCK_MAXRECS)
int xfs_inobt_block_maxrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_INOBT_BLOCK_MAXRECS(lev,cur) xfs_inobt_block_maxrecs(lev,cur)
#else
#define XFS_INOBT_BLOCK_MAXRECS(lev,cur) \
((cur)->bc_mp->m_inobt_mxr[lev != 0])
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_BLOCK_MINRECS)
int xfs_inobt_block_minrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_INOBT_BLOCK_MINRECS(lev,cur) xfs_inobt_block_minrecs(lev,cur)
#else
#define XFS_INOBT_BLOCK_MINRECS(lev,cur) \
((cur)->bc_mp->m_inobt_mnr[lev != 0])
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_IS_LAST_REC)
int xfs_inobt_is_last_rec(struct xfs_btree_cur *cur);
#define XFS_INOBT_IS_LAST_REC(cur) xfs_inobt_is_last_rec(cur)
#else
#define XFS_INOBT_IS_LAST_REC(cur) \
((cur)->bc_ptrs[0] == \
INT_GET(XFS_BUF_TO_INOBT_BLOCK((cur)->bc_bufs[0])->bb_numrecs, ARCH_CONVERT))
#endif
/*
* Maximum number of inode btree levels.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IN_MAXLEVELS)
int xfs_in_maxlevels(struct xfs_mount *mp);
#define XFS_IN_MAXLEVELS(mp) xfs_in_maxlevels(mp)
#else
#define XFS_IN_MAXLEVELS(mp) ((mp)->m_in_maxlevels)
#endif
/*
* block numbers in the AG.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IBT_BLOCK)
xfs_agblock_t xfs_ibt_block(struct xfs_mount *mp);
#define XFS_IBT_BLOCK(mp) xfs_ibt_block(mp)
#else
#define XFS_IBT_BLOCK(mp) ((xfs_agblock_t)(XFS_CNT_BLOCK(mp) + 1))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_PREALLOC_BLOCKS)
xfs_agblock_t xfs_prealloc_blocks(struct xfs_mount *mp);
#define XFS_PREALLOC_BLOCKS(mp) xfs_prealloc_blocks(mp)
#else
#define XFS_PREALLOC_BLOCKS(mp) ((xfs_agblock_t)(XFS_IBT_BLOCK(mp) + 1))
#endif
/*
* Record, key, and pointer address macros for btree blocks.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_REC_ADDR)
xfs_inobt_rec_t *
xfs_inobt_rec_addr(xfs_inobt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_INOBT_REC_ADDR(bb,i,cur) xfs_inobt_rec_addr(bb,i,cur)
#else
#define XFS_INOBT_REC_ADDR(bb,i,cur) \
XFS_BTREE_REC_ADDR(XFS_INOBT_BLOCK_SIZE(0,cur), xfs_inobt, bb, i, \
XFS_INOBT_BLOCK_MAXRECS(0, cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_KEY_ADDR)
xfs_inobt_key_t *
xfs_inobt_key_addr(xfs_inobt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_INOBT_KEY_ADDR(bb,i,cur) xfs_inobt_key_addr(bb,i,cur)
#else
#define XFS_INOBT_KEY_ADDR(bb,i,cur) \
XFS_BTREE_KEY_ADDR(XFS_INOBT_BLOCK_SIZE(1,cur), xfs_inobt, bb, i, \
XFS_INOBT_BLOCK_MAXRECS(1, cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_PTR_ADDR)
xfs_inobt_ptr_t *
xfs_inobt_ptr_addr(xfs_inobt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_INOBT_PTR_ADDR(bb,i,cur) xfs_inobt_ptr_addr(bb,i,cur)
#else
#define XFS_INOBT_PTR_ADDR(bb,i,cur) \
XFS_BTREE_PTR_ADDR(XFS_INOBT_BLOCK_SIZE(1,cur), xfs_inobt, bb, i, \
XFS_INOBT_BLOCK_MAXRECS(1, cur))
#endif
/*
* Prototypes for externally visible routines.
*/
/*
* Decrement cursor by one record at the level.
* For nonzero levels the leaf-ward information is untouched.
*/
int /* error */
xfs_inobt_decrement(
struct xfs_btree_cur *cur, /* btree cursor */
int level, /* level in btree, 0 is leaf */
int *stat); /* success/failure */
/*
* Delete the record pointed to by cur.
* The cursor refers to the place where the record was (could be inserted)
* when the operation returns.
*/
int /* error */
xfs_inobt_delete(
struct xfs_btree_cur *cur, /* btree cursor */
int *stat); /* success/failure */
/*
* Get the data from the pointed-to record.
*/
int /* error */
xfs_inobt_get_rec(
struct xfs_btree_cur *cur, /* btree cursor */
xfs_agino_t *ino, /* output: starting inode of chunk */
__int32_t *fcnt, /* output: number of free inodes */
xfs_inofree_t *free, /* output: free inode mask */
int *stat); /* output: success/failure */
/*
* Increment cursor by one record at the level.
* For nonzero levels the leaf-ward information is untouched.
*/
int /* error */
xfs_inobt_increment(
struct xfs_btree_cur *cur, /* btree cursor */
int level, /* level in btree, 0 is leaf */
int *stat); /* success/failure */
/*
* Insert the current record at the point referenced by cur.
* The cursor may be inconsistent on return if splits have been done.
*/
int /* error */
xfs_inobt_insert(
struct xfs_btree_cur *cur, /* btree cursor */
int *stat); /* success/failure */
/*
* Lookup the record equal to ino in the btree given by cur.
*/
int /* error */
xfs_inobt_lookup_eq(
struct xfs_btree_cur *cur, /* btree cursor */
xfs_agino_t ino, /* starting inode of chunk */
__int32_t fcnt, /* free inode count */
xfs_inofree_t free, /* free inode mask */
int *stat); /* success/failure */
/*
* Lookup the first record greater than or equal to ino
* in the btree given by cur.
*/
int /* error */
xfs_inobt_lookup_ge(
struct xfs_btree_cur *cur, /* btree cursor */
xfs_agino_t ino, /* starting inode of chunk */
__int32_t fcnt, /* free inode count */
xfs_inofree_t free, /* free inode mask */
int *stat); /* success/failure */
/*
* Lookup the first record less than or equal to ino
* in the btree given by cur.
*/
int /* error */
xfs_inobt_lookup_le(
struct xfs_btree_cur *cur, /* btree cursor */
xfs_agino_t ino, /* starting inode of chunk */
__int32_t fcnt, /* free inode count */
xfs_inofree_t free, /* free inode mask */
int *stat); /* success/failure */
/*
* Update the record referred to by cur, to the value given
* by [ino, fcnt, free].
* This either works (return 0) or gets an EFSCORRUPTED error.
*/
int /* error */
xfs_inobt_update(
struct xfs_btree_cur *cur, /* btree cursor */
xfs_agino_t ino, /* starting inode of chunk */
__int32_t fcnt, /* free inode count */
xfs_inofree_t free); /* free inode mask */
#endif /* __XFS_IALLOC_BTREE_H__ */
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