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linux/fs/xfs/xfs_bmap_btree.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

702 lines
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/*
* Copyright (c) 2000,2002-2004 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_BMAP_BTREE_H__
#define __XFS_BMAP_BTREE_H__
#define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */
struct xfs_btree_cur;
struct xfs_btree_lblock;
struct xfs_mount;
struct xfs_inode;
/*
* Bmap root header, on-disk form only.
*/
typedef struct xfs_bmdr_block
{
__uint16_t bb_level; /* 0 is a leaf */
__uint16_t bb_numrecs; /* current # of data records */
} xfs_bmdr_block_t;
/*
* Bmap btree record and extent descriptor.
* For 32-bit kernels,
* l0:31 is an extent flag (value 1 indicates non-normal).
* l0:0-30 and l1:9-31 are startoff.
* l1:0-8, l2:0-31, and l3:21-31 are startblock.
* l3:0-20 are blockcount.
* For 64-bit kernels,
* l0:63 is an extent flag (value 1 indicates non-normal).
* l0:9-62 are startoff.
* l0:0-8 and l1:21-63 are startblock.
* l1:0-20 are blockcount.
*/
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define BMBT_TOTAL_BITLEN 128 /* 128 bits, 16 bytes */
#define BMBT_EXNTFLAG_BITOFF 0
#define BMBT_EXNTFLAG_BITLEN 1
#define BMBT_STARTOFF_BITOFF (BMBT_EXNTFLAG_BITOFF + BMBT_EXNTFLAG_BITLEN)
#define BMBT_STARTOFF_BITLEN 54
#define BMBT_STARTBLOCK_BITOFF (BMBT_STARTOFF_BITOFF + BMBT_STARTOFF_BITLEN)
#define BMBT_STARTBLOCK_BITLEN 52
#define BMBT_BLOCKCOUNT_BITOFF \
(BMBT_STARTBLOCK_BITOFF + BMBT_STARTBLOCK_BITLEN)
#define BMBT_BLOCKCOUNT_BITLEN (BMBT_TOTAL_BITLEN - BMBT_BLOCKCOUNT_BITOFF)
#else
#define BMBT_TOTAL_BITLEN 128 /* 128 bits, 16 bytes */
#define BMBT_EXNTFLAG_BITOFF 63
#define BMBT_EXNTFLAG_BITLEN 1
#define BMBT_STARTOFF_BITOFF (BMBT_EXNTFLAG_BITOFF - BMBT_STARTOFF_BITLEN)
#define BMBT_STARTOFF_BITLEN 54
#define BMBT_STARTBLOCK_BITOFF 85 /* 128 - 43 (other 9 is in first word) */
#define BMBT_STARTBLOCK_BITLEN 52
#define BMBT_BLOCKCOUNT_BITOFF 64 /* Start of second 64 bit container */
#define BMBT_BLOCKCOUNT_BITLEN 21
#endif
#define BMBT_USE_64 1
typedef struct xfs_bmbt_rec_32
{
__uint32_t l0, l1, l2, l3;
} xfs_bmbt_rec_32_t;
typedef struct xfs_bmbt_rec_64
{
__uint64_t l0, l1;
} xfs_bmbt_rec_64_t;
typedef __uint64_t xfs_bmbt_rec_base_t; /* use this for casts */
typedef xfs_bmbt_rec_64_t xfs_bmbt_rec_t, xfs_bmdr_rec_t;
/*
* Values and macros for delayed-allocation startblock fields.
*/
#define STARTBLOCKVALBITS 17
#define STARTBLOCKMASKBITS (15 + XFS_BIG_BLKNOS * 20)
#define DSTARTBLOCKMASKBITS (15 + 20)
#define STARTBLOCKMASK \
(((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
#define DSTARTBLOCKMASK \
(((((xfs_dfsbno_t)1) << DSTARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS)
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_ISNULLSTARTBLOCK)
int isnullstartblock(xfs_fsblock_t x);
#define ISNULLSTARTBLOCK(x) isnullstartblock(x)
#else
#define ISNULLSTARTBLOCK(x) (((x) & STARTBLOCKMASK) == STARTBLOCKMASK)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_ISNULLDSTARTBLOCK)
int isnulldstartblock(xfs_dfsbno_t x);
#define ISNULLDSTARTBLOCK(x) isnulldstartblock(x)
#else
#define ISNULLDSTARTBLOCK(x) (((x) & DSTARTBLOCKMASK) == DSTARTBLOCKMASK)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_NULLSTARTBLOCK)
xfs_fsblock_t nullstartblock(int k);
#define NULLSTARTBLOCK(k) nullstartblock(k)
#else
#define NULLSTARTBLOCK(k) \
((ASSERT(k < (1 << STARTBLOCKVALBITS))), (STARTBLOCKMASK | (k)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_STARTBLOCKVAL)
xfs_filblks_t startblockval(xfs_fsblock_t x);
#define STARTBLOCKVAL(x) startblockval(x)
#else
#define STARTBLOCKVAL(x) ((xfs_filblks_t)((x) & ~STARTBLOCKMASK))
#endif
/*
* Possible extent formats.
*/
typedef enum {
XFS_EXTFMT_NOSTATE = 0,
XFS_EXTFMT_HASSTATE
} xfs_exntfmt_t;
/*
* Possible extent states.
*/
typedef enum {
XFS_EXT_NORM, XFS_EXT_UNWRITTEN,
XFS_EXT_DMAPI_OFFLINE, XFS_EXT_INVALID
} xfs_exntst_t;
/*
* Extent state and extent format macros.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_EXTFMT_INODE )
xfs_exntfmt_t xfs_extfmt_inode(struct xfs_inode *ip);
#define XFS_EXTFMT_INODE(x) xfs_extfmt_inode(x)
#else
#define XFS_EXTFMT_INODE(x) \
(XFS_SB_VERSION_HASEXTFLGBIT(&((x)->i_mount->m_sb)) ? \
XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE)
#endif
#define ISUNWRITTEN(x) ((x)->br_state == XFS_EXT_UNWRITTEN)
/*
* Incore version of above.
*/
typedef struct xfs_bmbt_irec
{
xfs_fileoff_t br_startoff; /* starting file offset */
xfs_fsblock_t br_startblock; /* starting block number */
xfs_filblks_t br_blockcount; /* number of blocks */
xfs_exntst_t br_state; /* extent state */
} xfs_bmbt_irec_t;
/*
* Key structure for non-leaf levels of the tree.
*/
typedef struct xfs_bmbt_key
{
xfs_dfiloff_t br_startoff; /* starting file offset */
} xfs_bmbt_key_t, xfs_bmdr_key_t;
typedef xfs_dfsbno_t xfs_bmbt_ptr_t, xfs_bmdr_ptr_t; /* btree pointer type */
/* btree block header type */
typedef struct xfs_btree_lblock xfs_bmbt_block_t;
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_BMBT_BLOCK)
xfs_bmbt_block_t *xfs_buf_to_bmbt_block(struct xfs_buf *bp);
#define XFS_BUF_TO_BMBT_BLOCK(bp) xfs_buf_to_bmbt_block(bp)
#else
#define XFS_BUF_TO_BMBT_BLOCK(bp) ((xfs_bmbt_block_t *)(XFS_BUF_PTR(bp)))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_RBLOCK_DSIZE)
int xfs_bmap_rblock_dsize(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_RBLOCK_DSIZE(lev,cur) xfs_bmap_rblock_dsize(lev,cur)
#else
#define XFS_BMAP_RBLOCK_DSIZE(lev,cur) ((cur)->bc_private.b.forksize)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_RBLOCK_ISIZE)
int xfs_bmap_rblock_isize(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_RBLOCK_ISIZE(lev,cur) xfs_bmap_rblock_isize(lev,cur)
#else
#define XFS_BMAP_RBLOCK_ISIZE(lev,cur) \
((int)XFS_IFORK_PTR((cur)->bc_private.b.ip, \
(cur)->bc_private.b.whichfork)->if_broot_bytes)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_IBLOCK_SIZE)
int xfs_bmap_iblock_size(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_IBLOCK_SIZE(lev,cur) xfs_bmap_iblock_size(lev,cur)
#else
#define XFS_BMAP_IBLOCK_SIZE(lev,cur) (1 << (cur)->bc_blocklog)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_DSIZE)
int xfs_bmap_block_dsize(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_DSIZE(lev,cur) xfs_bmap_block_dsize(lev,cur)
#else
#define XFS_BMAP_BLOCK_DSIZE(lev,cur) \
((lev) == (cur)->bc_nlevels - 1 ? \
XFS_BMAP_RBLOCK_DSIZE(lev,cur) : \
XFS_BMAP_IBLOCK_SIZE(lev,cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_ISIZE)
int xfs_bmap_block_isize(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_ISIZE(lev,cur) xfs_bmap_block_isize(lev,cur)
#else
#define XFS_BMAP_BLOCK_ISIZE(lev,cur) \
((lev) == (cur)->bc_nlevels - 1 ? \
XFS_BMAP_RBLOCK_ISIZE(lev,cur) : \
XFS_BMAP_IBLOCK_SIZE(lev,cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_DMAXRECS)
int xfs_bmap_block_dmaxrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_DMAXRECS(lev,cur) xfs_bmap_block_dmaxrecs(lev,cur)
#else
#define XFS_BMAP_BLOCK_DMAXRECS(lev,cur) \
((lev) == (cur)->bc_nlevels - 1 ? \
XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur), \
xfs_bmdr, (lev) == 0) : \
((cur)->bc_mp->m_bmap_dmxr[(lev) != 0]))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_IMAXRECS)
int xfs_bmap_block_imaxrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_IMAXRECS(lev,cur) xfs_bmap_block_imaxrecs(lev,cur)
#else
#define XFS_BMAP_BLOCK_IMAXRECS(lev,cur) \
((lev) == (cur)->bc_nlevels - 1 ? \
XFS_BTREE_BLOCK_MAXRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur), \
xfs_bmbt, (lev) == 0) : \
((cur)->bc_mp->m_bmap_dmxr[(lev) != 0]))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_DMINRECS)
int xfs_bmap_block_dminrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_DMINRECS(lev,cur) xfs_bmap_block_dminrecs(lev,cur)
#else
#define XFS_BMAP_BLOCK_DMINRECS(lev,cur) \
((lev) == (cur)->bc_nlevels - 1 ? \
XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_DSIZE(lev,cur), \
xfs_bmdr, (lev) == 0) : \
((cur)->bc_mp->m_bmap_dmnr[(lev) != 0]))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BLOCK_IMINRECS)
int xfs_bmap_block_iminrecs(int lev, struct xfs_btree_cur *cur);
#define XFS_BMAP_BLOCK_IMINRECS(lev,cur) xfs_bmap_block_iminrecs(lev,cur)
#else
#define XFS_BMAP_BLOCK_IMINRECS(lev,cur) \
((lev) == (cur)->bc_nlevels - 1 ? \
XFS_BTREE_BLOCK_MINRECS(XFS_BMAP_RBLOCK_ISIZE(lev,cur), \
xfs_bmbt, (lev) == 0) : \
((cur)->bc_mp->m_bmap_dmnr[(lev) != 0]))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_REC_DADDR)
xfs_bmbt_rec_t *
xfs_bmap_rec_daddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_REC_DADDR(bb,i,cur) xfs_bmap_rec_daddr(bb,i,cur)
#else
#define XFS_BMAP_REC_DADDR(bb,i,cur) \
XFS_BTREE_REC_ADDR(XFS_BMAP_BLOCK_DSIZE( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur), \
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_REC_IADDR)
xfs_bmbt_rec_t *
xfs_bmap_rec_iaddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_REC_IADDR(bb,i,cur) xfs_bmap_rec_iaddr(bb,i,cur)
#else
#define XFS_BMAP_REC_IADDR(bb,i,cur) \
XFS_BTREE_REC_ADDR(XFS_BMAP_BLOCK_ISIZE( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur), \
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_KEY_DADDR)
xfs_bmbt_key_t *
xfs_bmap_key_daddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_KEY_DADDR(bb,i,cur) xfs_bmap_key_daddr(bb,i,cur)
#else
#define XFS_BMAP_KEY_DADDR(bb,i,cur) \
XFS_BTREE_KEY_ADDR(XFS_BMAP_BLOCK_DSIZE( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur), \
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_KEY_IADDR)
xfs_bmbt_key_t *
xfs_bmap_key_iaddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_KEY_IADDR(bb,i,cur) xfs_bmap_key_iaddr(bb,i,cur)
#else
#define XFS_BMAP_KEY_IADDR(bb,i,cur) \
XFS_BTREE_KEY_ADDR(XFS_BMAP_BLOCK_ISIZE( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur), \
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_PTR_DADDR)
xfs_bmbt_ptr_t *
xfs_bmap_ptr_daddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_PTR_DADDR(bb,i,cur) xfs_bmap_ptr_daddr(bb,i,cur)
#else
#define XFS_BMAP_PTR_DADDR(bb,i,cur) \
XFS_BTREE_PTR_ADDR(XFS_BMAP_BLOCK_DSIZE( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur), \
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_PTR_IADDR)
xfs_bmbt_ptr_t *
xfs_bmap_ptr_iaddr(xfs_bmbt_block_t *bb, int i, struct xfs_btree_cur *cur);
#define XFS_BMAP_PTR_IADDR(bb,i,cur) xfs_bmap_ptr_iaddr(bb,i,cur)
#else
#define XFS_BMAP_PTR_IADDR(bb,i,cur) \
XFS_BTREE_PTR_ADDR(XFS_BMAP_BLOCK_ISIZE( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur), \
xfs_bmbt, bb, i, XFS_BMAP_BLOCK_IMAXRECS( \
INT_GET((bb)->bb_level, ARCH_CONVERT), cur))
#endif
/*
* These are to be used when we know the size of the block and
* we don't have a cursor.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_REC_ADDR)
xfs_bmbt_rec_t *xfs_bmap_broot_rec_addr(xfs_bmbt_block_t *bb, int i, int sz);
#define XFS_BMAP_BROOT_REC_ADDR(bb,i,sz) xfs_bmap_broot_rec_addr(bb,i,sz)
#else
#define XFS_BMAP_BROOT_REC_ADDR(bb,i,sz) \
XFS_BTREE_REC_ADDR(sz,xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_KEY_ADDR)
xfs_bmbt_key_t *xfs_bmap_broot_key_addr(xfs_bmbt_block_t *bb, int i, int sz);
#define XFS_BMAP_BROOT_KEY_ADDR(bb,i,sz) xfs_bmap_broot_key_addr(bb,i,sz)
#else
#define XFS_BMAP_BROOT_KEY_ADDR(bb,i,sz) \
XFS_BTREE_KEY_ADDR(sz,xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_PTR_ADDR)
xfs_bmbt_ptr_t *xfs_bmap_broot_ptr_addr(xfs_bmbt_block_t *bb, int i, int sz);
#define XFS_BMAP_BROOT_PTR_ADDR(bb,i,sz) xfs_bmap_broot_ptr_addr(bb,i,sz)
#else
#define XFS_BMAP_BROOT_PTR_ADDR(bb,i,sz) \
XFS_BTREE_PTR_ADDR(sz,xfs_bmbt,bb,i,XFS_BMAP_BROOT_MAXRECS(sz))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_NUMRECS)
int xfs_bmap_broot_numrecs(xfs_bmdr_block_t *bb);
#define XFS_BMAP_BROOT_NUMRECS(bb) xfs_bmap_broot_numrecs(bb)
#else
#define XFS_BMAP_BROOT_NUMRECS(bb) (INT_GET((bb)->bb_numrecs, ARCH_CONVERT))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_MAXRECS)
int xfs_bmap_broot_maxrecs(int sz);
#define XFS_BMAP_BROOT_MAXRECS(sz) xfs_bmap_broot_maxrecs(sz)
#else
#define XFS_BMAP_BROOT_MAXRECS(sz) XFS_BTREE_BLOCK_MAXRECS(sz,xfs_bmbt,0)
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_SPACE_CALC)
int xfs_bmap_broot_space_calc(int nrecs);
#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) xfs_bmap_broot_space_calc(nrecs)
#else
#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) \
((int)(sizeof(xfs_bmbt_block_t) + \
((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_BROOT_SPACE)
int xfs_bmap_broot_space(xfs_bmdr_block_t *bb);
#define XFS_BMAP_BROOT_SPACE(bb) xfs_bmap_broot_space(bb)
#else
#define XFS_BMAP_BROOT_SPACE(bb) \
XFS_BMAP_BROOT_SPACE_CALC(INT_GET((bb)->bb_numrecs, ARCH_CONVERT))
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMDR_SPACE_CALC)
int xfs_bmdr_space_calc(int nrecs);
#define XFS_BMDR_SPACE_CALC(nrecs) xfs_bmdr_space_calc(nrecs)
#else
#define XFS_BMDR_SPACE_CALC(nrecs) \
((int)(sizeof(xfs_bmdr_block_t) + \
((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))))
#endif
/*
* Maximum number of bmap btree levels.
*/
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BM_MAXLEVELS)
int xfs_bm_maxlevels(struct xfs_mount *mp, int w);
#define XFS_BM_MAXLEVELS(mp,w) xfs_bm_maxlevels(mp,w)
#else
#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[w])
#endif
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_SANITY_CHECK)
int xfs_bmap_sanity_check(struct xfs_mount *mp, xfs_bmbt_block_t *bb,
int level);
#define XFS_BMAP_SANITY_CHECK(mp,bb,level) \
xfs_bmap_sanity_check(mp,bb,level)
#else
#define XFS_BMAP_SANITY_CHECK(mp,bb,level) \
(INT_GET((bb)->bb_magic, ARCH_CONVERT) == XFS_BMAP_MAGIC && \
INT_GET((bb)->bb_level, ARCH_CONVERT) == level && \
INT_GET((bb)->bb_numrecs, ARCH_CONVERT) > 0 && \
INT_GET((bb)->bb_numrecs, ARCH_CONVERT) <= (mp)->m_bmap_dmxr[(level) != 0])
#endif
#ifdef __KERNEL__
#if defined(XFS_BMBT_TRACE)
/*
* Trace buffer entry types.
*/
#define XFS_BMBT_KTRACE_ARGBI 1
#define XFS_BMBT_KTRACE_ARGBII 2
#define XFS_BMBT_KTRACE_ARGFFFI 3
#define XFS_BMBT_KTRACE_ARGI 4
#define XFS_BMBT_KTRACE_ARGIFK 5
#define XFS_BMBT_KTRACE_ARGIFR 6
#define XFS_BMBT_KTRACE_ARGIK 7
#define XFS_BMBT_KTRACE_CUR 8
#define XFS_BMBT_TRACE_SIZE 4096 /* size of global trace buffer */
#define XFS_BMBT_KTRACE_SIZE 32 /* size of per-inode trace buffer */
extern ktrace_t *xfs_bmbt_trace_buf;
#endif
/*
* Prototypes for xfs_bmap.c to call.
*/
void
xfs_bmdr_to_bmbt(
xfs_bmdr_block_t *,
int,
xfs_bmbt_block_t *,
int);
int
xfs_bmbt_decrement(
struct xfs_btree_cur *,
int,
int *);
int
xfs_bmbt_delete(
struct xfs_btree_cur *,
int *);
void
xfs_bmbt_get_all(
xfs_bmbt_rec_t *r,
xfs_bmbt_irec_t *s);
xfs_bmbt_block_t *
xfs_bmbt_get_block(
struct xfs_btree_cur *cur,
int level,
struct xfs_buf **bpp);
xfs_filblks_t
xfs_bmbt_get_blockcount(
xfs_bmbt_rec_t *r);
xfs_fsblock_t
xfs_bmbt_get_startblock(
xfs_bmbt_rec_t *r);
xfs_fileoff_t
xfs_bmbt_get_startoff(
xfs_bmbt_rec_t *r);
xfs_exntst_t
xfs_bmbt_get_state(
xfs_bmbt_rec_t *r);
#if __BYTE_ORDER != __BIG_ENDIAN
void
xfs_bmbt_disk_get_all(
xfs_bmbt_rec_t *r,
xfs_bmbt_irec_t *s);
xfs_exntst_t
xfs_bmbt_disk_get_state(
xfs_bmbt_rec_t *r);
xfs_filblks_t
xfs_bmbt_disk_get_blockcount(
xfs_bmbt_rec_t *r);
xfs_fsblock_t
xfs_bmbt_disk_get_startblock(
xfs_bmbt_rec_t *r);
xfs_fileoff_t
xfs_bmbt_disk_get_startoff(
xfs_bmbt_rec_t *r);
#else
#define xfs_bmbt_disk_get_all(r, s) \
xfs_bmbt_get_all(r, s)
#define xfs_bmbt_disk_get_state(r) \
xfs_bmbt_get_state(r)
#define xfs_bmbt_disk_get_blockcount(r) \
xfs_bmbt_get_blockcount(r)
#define xfs_bmbt_disk_get_startblock(r) \
xfs_bmbt_get_blockcount(r)
#define xfs_bmbt_disk_get_startoff(r) \
xfs_bmbt_get_startoff(r)
#endif
int
xfs_bmbt_increment(
struct xfs_btree_cur *,
int,
int *);
int
xfs_bmbt_insert(
struct xfs_btree_cur *,
int *);
void
xfs_bmbt_log_block(
struct xfs_btree_cur *,
struct xfs_buf *,
int);
void
xfs_bmbt_log_recs(
struct xfs_btree_cur *,
struct xfs_buf *,
int,
int);
int
xfs_bmbt_lookup_eq(
struct xfs_btree_cur *,
xfs_fileoff_t,
xfs_fsblock_t,
xfs_filblks_t,
int *);
int
xfs_bmbt_lookup_ge(
struct xfs_btree_cur *,
xfs_fileoff_t,
xfs_fsblock_t,
xfs_filblks_t,
int *);
int
xfs_bmbt_lookup_le(
struct xfs_btree_cur *,
xfs_fileoff_t,
xfs_fsblock_t,
xfs_filblks_t,
int *);
/*
* Give the bmap btree a new root block. Copy the old broot contents
* down into a real block and make the broot point to it.
*/
int /* error */
xfs_bmbt_newroot(
struct xfs_btree_cur *cur, /* btree cursor */
int *logflags, /* logging flags for inode */
int *stat); /* return status - 0 fail */
void
xfs_bmbt_set_all(
xfs_bmbt_rec_t *r,
xfs_bmbt_irec_t *s);
void
xfs_bmbt_set_allf(
xfs_bmbt_rec_t *r,
xfs_fileoff_t o,
xfs_fsblock_t b,
xfs_filblks_t c,
xfs_exntst_t v);
void
xfs_bmbt_set_blockcount(
xfs_bmbt_rec_t *r,
xfs_filblks_t v);
void
xfs_bmbt_set_startblock(
xfs_bmbt_rec_t *r,
xfs_fsblock_t v);
void
xfs_bmbt_set_startoff(
xfs_bmbt_rec_t *r,
xfs_fileoff_t v);
void
xfs_bmbt_set_state(
xfs_bmbt_rec_t *r,
xfs_exntst_t v);
#if __BYTE_ORDER != __BIG_ENDIAN
void
xfs_bmbt_disk_set_all(
xfs_bmbt_rec_t *r,
xfs_bmbt_irec_t *s);
void
xfs_bmbt_disk_set_allf(
xfs_bmbt_rec_t *r,
xfs_fileoff_t o,
xfs_fsblock_t b,
xfs_filblks_t c,
xfs_exntst_t v);
#else
#define xfs_bmbt_disk_set_all(r, s) \
xfs_bmbt_set_all(r, s)
#define xfs_bmbt_disk_set_allf(r, o, b, c, v) \
xfs_bmbt_set_allf(r, o, b, c, v)
#endif
void
xfs_bmbt_to_bmdr(
xfs_bmbt_block_t *,
int,
xfs_bmdr_block_t *,
int);
int
xfs_bmbt_update(
struct xfs_btree_cur *,
xfs_fileoff_t,
xfs_fsblock_t,
xfs_filblks_t,
xfs_exntst_t);
#ifdef DEBUG
/*
* Get the data from the pointed-to record.
*/
int
xfs_bmbt_get_rec(
struct xfs_btree_cur *,
xfs_fileoff_t *,
xfs_fsblock_t *,
xfs_filblks_t *,
xfs_exntst_t *,
int *);
#endif
/*
* Search an extent list for the extent which includes block
* bno.
*/
xfs_bmbt_rec_t *
xfs_bmap_do_search_extents(
xfs_bmbt_rec_t *,
xfs_extnum_t,
xfs_extnum_t,
xfs_fileoff_t,
int *,
xfs_extnum_t *,
xfs_bmbt_irec_t *,
xfs_bmbt_irec_t *);
#endif /* __KERNEL__ */
#endif /* __XFS_BMAP_BTREE_H__ */
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