mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 20:22:09 +00:00
1da177e4c3
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!
315 lines
10 KiB
C
315 lines
10 KiB
C
/*
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* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#ifndef __XFS_IALLOC_BTREE_H__
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#define __XFS_IALLOC_BTREE_H__
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/*
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* Inode map on-disk structures
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*/
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struct xfs_buf;
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struct xfs_btree_cur;
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struct xfs_btree_sblock;
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struct xfs_mount;
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/*
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* There is a btree for the inode map per allocation group.
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*/
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#define XFS_IBT_MAGIC 0x49414254 /* 'IABT' */
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typedef __uint64_t xfs_inofree_t;
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#define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t))
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#define XFS_INODES_PER_CHUNK_LOG (XFS_NBBYLOG + 3)
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#define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1)
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_MASKN)
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xfs_inofree_t xfs_inobt_maskn(int i, int n);
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#define XFS_INOBT_MASKN(i,n) xfs_inobt_maskn(i,n)
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#else
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#define XFS_INOBT_MASKN(i,n) \
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((((n) >= XFS_INODES_PER_CHUNK ? \
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(xfs_inofree_t)0 : ((xfs_inofree_t)1 << (n))) - 1) << (i))
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#endif
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/*
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* Data record structure
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*/
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typedef struct xfs_inobt_rec
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{
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xfs_agino_t ir_startino; /* starting inode number */
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__int32_t ir_freecount; /* count of free inodes (set bits) */
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xfs_inofree_t ir_free; /* free inode mask */
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} xfs_inobt_rec_t;
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/*
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* Key structure
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*/
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typedef struct xfs_inobt_key
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{
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xfs_agino_t ir_startino; /* starting inode number */
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} xfs_inobt_key_t;
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typedef xfs_agblock_t xfs_inobt_ptr_t; /* btree pointer type */
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/* btree block header type */
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typedef struct xfs_btree_sblock xfs_inobt_block_t;
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_INOBT_BLOCK)
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xfs_inobt_block_t *xfs_buf_to_inobt_block(struct xfs_buf *bp);
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#define XFS_BUF_TO_INOBT_BLOCK(bp) xfs_buf_to_inobt_block(bp)
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#else
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#define XFS_BUF_TO_INOBT_BLOCK(bp) ((xfs_inobt_block_t *)(XFS_BUF_PTR(bp)))
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#endif
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/*
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* Bit manipulations for ir_free.
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*/
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_MASK)
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xfs_inofree_t xfs_inobt_mask(int i);
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#define XFS_INOBT_MASK(i) xfs_inobt_mask(i)
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#else
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#define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i))
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#endif
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_IS_FREE)
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int xfs_inobt_is_free(xfs_inobt_rec_t *rp, int i);
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#define XFS_INOBT_IS_FREE(rp,i) xfs_inobt_is_free(rp,i)
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#else
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#define XFS_INOBT_IS_FREE(rp,i) (((rp)->ir_free & XFS_INOBT_MASK(i)) != 0)
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#endif
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_SET_FREE)
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void xfs_inobt_set_free(xfs_inobt_rec_t *rp, int i);
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#define XFS_INOBT_SET_FREE(rp,i) xfs_inobt_set_free(rp,i)
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#else
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#define XFS_INOBT_SET_FREE(rp,i) ((rp)->ir_free |= XFS_INOBT_MASK(i))
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#endif
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_CLR_FREE)
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void xfs_inobt_clr_free(xfs_inobt_rec_t *rp, int i);
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#define XFS_INOBT_CLR_FREE(rp,i) xfs_inobt_clr_free(rp,i)
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#else
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#define XFS_INOBT_CLR_FREE(rp,i) ((rp)->ir_free &= ~XFS_INOBT_MASK(i))
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#endif
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/*
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* Real block structures have a size equal to the disk block size.
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*/
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_BLOCK_SIZE)
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int xfs_inobt_block_size(int lev, struct xfs_btree_cur *cur);
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#define XFS_INOBT_BLOCK_SIZE(lev,cur) xfs_inobt_block_size(lev,cur)
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#else
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#define XFS_INOBT_BLOCK_SIZE(lev,cur) (1 << (cur)->bc_blocklog)
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#endif
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_BLOCK_MAXRECS)
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int xfs_inobt_block_maxrecs(int lev, struct xfs_btree_cur *cur);
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#define XFS_INOBT_BLOCK_MAXRECS(lev,cur) xfs_inobt_block_maxrecs(lev,cur)
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#else
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#define XFS_INOBT_BLOCK_MAXRECS(lev,cur) \
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((cur)->bc_mp->m_inobt_mxr[lev != 0])
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#endif
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_BLOCK_MINRECS)
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int xfs_inobt_block_minrecs(int lev, struct xfs_btree_cur *cur);
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#define XFS_INOBT_BLOCK_MINRECS(lev,cur) xfs_inobt_block_minrecs(lev,cur)
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#else
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#define XFS_INOBT_BLOCK_MINRECS(lev,cur) \
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((cur)->bc_mp->m_inobt_mnr[lev != 0])
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#endif
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_IS_LAST_REC)
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int xfs_inobt_is_last_rec(struct xfs_btree_cur *cur);
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#define XFS_INOBT_IS_LAST_REC(cur) xfs_inobt_is_last_rec(cur)
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#else
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#define XFS_INOBT_IS_LAST_REC(cur) \
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((cur)->bc_ptrs[0] == \
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INT_GET(XFS_BUF_TO_INOBT_BLOCK((cur)->bc_bufs[0])->bb_numrecs, ARCH_CONVERT))
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#endif
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/*
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* Maximum number of inode btree levels.
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*/
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IN_MAXLEVELS)
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int xfs_in_maxlevels(struct xfs_mount *mp);
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#define XFS_IN_MAXLEVELS(mp) xfs_in_maxlevels(mp)
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#else
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#define XFS_IN_MAXLEVELS(mp) ((mp)->m_in_maxlevels)
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#endif
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/*
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* block numbers in the AG.
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*/
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IBT_BLOCK)
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xfs_agblock_t xfs_ibt_block(struct xfs_mount *mp);
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#define XFS_IBT_BLOCK(mp) xfs_ibt_block(mp)
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#else
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#define XFS_IBT_BLOCK(mp) ((xfs_agblock_t)(XFS_CNT_BLOCK(mp) + 1))
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#endif
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_PREALLOC_BLOCKS)
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xfs_agblock_t xfs_prealloc_blocks(struct xfs_mount *mp);
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#define XFS_PREALLOC_BLOCKS(mp) xfs_prealloc_blocks(mp)
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#else
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#define XFS_PREALLOC_BLOCKS(mp) ((xfs_agblock_t)(XFS_IBT_BLOCK(mp) + 1))
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#endif
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/*
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* Record, key, and pointer address macros for btree blocks.
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*/
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_REC_ADDR)
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xfs_inobt_rec_t *
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xfs_inobt_rec_addr(xfs_inobt_block_t *bb, int i, struct xfs_btree_cur *cur);
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#define XFS_INOBT_REC_ADDR(bb,i,cur) xfs_inobt_rec_addr(bb,i,cur)
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#else
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#define XFS_INOBT_REC_ADDR(bb,i,cur) \
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XFS_BTREE_REC_ADDR(XFS_INOBT_BLOCK_SIZE(0,cur), xfs_inobt, bb, i, \
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XFS_INOBT_BLOCK_MAXRECS(0, cur))
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#endif
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_KEY_ADDR)
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xfs_inobt_key_t *
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xfs_inobt_key_addr(xfs_inobt_block_t *bb, int i, struct xfs_btree_cur *cur);
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#define XFS_INOBT_KEY_ADDR(bb,i,cur) xfs_inobt_key_addr(bb,i,cur)
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#else
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#define XFS_INOBT_KEY_ADDR(bb,i,cur) \
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XFS_BTREE_KEY_ADDR(XFS_INOBT_BLOCK_SIZE(1,cur), xfs_inobt, bb, i, \
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XFS_INOBT_BLOCK_MAXRECS(1, cur))
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#endif
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#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INOBT_PTR_ADDR)
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xfs_inobt_ptr_t *
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xfs_inobt_ptr_addr(xfs_inobt_block_t *bb, int i, struct xfs_btree_cur *cur);
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#define XFS_INOBT_PTR_ADDR(bb,i,cur) xfs_inobt_ptr_addr(bb,i,cur)
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#else
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#define XFS_INOBT_PTR_ADDR(bb,i,cur) \
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XFS_BTREE_PTR_ADDR(XFS_INOBT_BLOCK_SIZE(1,cur), xfs_inobt, bb, i, \
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XFS_INOBT_BLOCK_MAXRECS(1, cur))
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#endif
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/*
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* Prototypes for externally visible routines.
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*/
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/*
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* Decrement cursor by one record at the level.
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* For nonzero levels the leaf-ward information is untouched.
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*/
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int /* error */
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xfs_inobt_decrement(
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struct xfs_btree_cur *cur, /* btree cursor */
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int level, /* level in btree, 0 is leaf */
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int *stat); /* success/failure */
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/*
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* Delete the record pointed to by cur.
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* The cursor refers to the place where the record was (could be inserted)
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* when the operation returns.
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*/
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int /* error */
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xfs_inobt_delete(
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struct xfs_btree_cur *cur, /* btree cursor */
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int *stat); /* success/failure */
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/*
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* Get the data from the pointed-to record.
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*/
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int /* error */
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xfs_inobt_get_rec(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agino_t *ino, /* output: starting inode of chunk */
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__int32_t *fcnt, /* output: number of free inodes */
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xfs_inofree_t *free, /* output: free inode mask */
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int *stat); /* output: success/failure */
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/*
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* Increment cursor by one record at the level.
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* For nonzero levels the leaf-ward information is untouched.
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*/
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int /* error */
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xfs_inobt_increment(
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struct xfs_btree_cur *cur, /* btree cursor */
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int level, /* level in btree, 0 is leaf */
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int *stat); /* success/failure */
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/*
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* Insert the current record at the point referenced by cur.
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* The cursor may be inconsistent on return if splits have been done.
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*/
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int /* error */
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xfs_inobt_insert(
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struct xfs_btree_cur *cur, /* btree cursor */
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int *stat); /* success/failure */
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/*
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* Lookup the record equal to ino in the btree given by cur.
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*/
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int /* error */
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xfs_inobt_lookup_eq(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agino_t ino, /* starting inode of chunk */
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__int32_t fcnt, /* free inode count */
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xfs_inofree_t free, /* free inode mask */
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int *stat); /* success/failure */
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/*
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* Lookup the first record greater than or equal to ino
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* in the btree given by cur.
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*/
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int /* error */
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xfs_inobt_lookup_ge(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agino_t ino, /* starting inode of chunk */
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__int32_t fcnt, /* free inode count */
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xfs_inofree_t free, /* free inode mask */
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int *stat); /* success/failure */
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/*
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* Lookup the first record less than or equal to ino
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* in the btree given by cur.
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*/
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int /* error */
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xfs_inobt_lookup_le(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agino_t ino, /* starting inode of chunk */
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__int32_t fcnt, /* free inode count */
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xfs_inofree_t free, /* free inode mask */
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int *stat); /* success/failure */
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/*
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* Update the record referred to by cur, to the value given
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* by [ino, fcnt, free].
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* This either works (return 0) or gets an EFSCORRUPTED error.
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*/
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int /* error */
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xfs_inobt_update(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agino_t ino, /* starting inode of chunk */
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__int32_t fcnt, /* free inode count */
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xfs_inofree_t free); /* free inode mask */
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#endif /* __XFS_IALLOC_BTREE_H__ */
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