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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/xfs/xfs_btree.h
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Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'fs/xfs/xfs_btree.h')
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diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
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@@ -0,0 +1,592 @@
+/*
+ * Copyright (c) 2000-2001 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_BTREE_H__
+#define __XFS_BTREE_H__
+
+struct xfs_buf;
+struct xfs_bmap_free;
+struct xfs_inode;
+struct xfs_mount;
+struct xfs_trans;
+
+/*
+ * This nonsense is to make -wlint happy.
+ */
+#define XFS_LOOKUP_EQ ((xfs_lookup_t)XFS_LOOKUP_EQi)
+#define XFS_LOOKUP_LE ((xfs_lookup_t)XFS_LOOKUP_LEi)
+#define XFS_LOOKUP_GE ((xfs_lookup_t)XFS_LOOKUP_GEi)
+
+#define XFS_BTNUM_BNO ((xfs_btnum_t)XFS_BTNUM_BNOi)
+#define XFS_BTNUM_CNT ((xfs_btnum_t)XFS_BTNUM_CNTi)
+#define XFS_BTNUM_BMAP ((xfs_btnum_t)XFS_BTNUM_BMAPi)
+#define XFS_BTNUM_INO ((xfs_btnum_t)XFS_BTNUM_INOi)
+
+/*
+ * Short form header: space allocation btrees.
+ */
+typedef struct xfs_btree_sblock
+{
+ __uint32_t bb_magic; /* magic number for block type */
+ __uint16_t bb_level; /* 0 is a leaf */
+ __uint16_t bb_numrecs; /* current # of data records */
+ xfs_agblock_t bb_leftsib; /* left sibling block or NULLAGBLOCK */
+ xfs_agblock_t bb_rightsib; /* right sibling block or NULLAGBLOCK */
+} xfs_btree_sblock_t;
+
+/*
+ * Long form header: bmap btrees.
+ */
+typedef struct xfs_btree_lblock
+{
+ __uint32_t bb_magic; /* magic number for block type */
+ __uint16_t bb_level; /* 0 is a leaf */
+ __uint16_t bb_numrecs; /* current # of data records */
+ xfs_dfsbno_t bb_leftsib; /* left sibling block or NULLDFSBNO */
+ xfs_dfsbno_t bb_rightsib; /* right sibling block or NULLDFSBNO */
+} xfs_btree_lblock_t;
+
+/*
+ * Combined header and structure, used by common code.
+ */
+typedef struct xfs_btree_hdr
+{
+ __uint32_t bb_magic; /* magic number for block type */
+ __uint16_t bb_level; /* 0 is a leaf */
+ __uint16_t bb_numrecs; /* current # of data records */
+} xfs_btree_hdr_t;
+
+typedef struct xfs_btree_block
+{
+ xfs_btree_hdr_t bb_h; /* header */
+ union {
+ struct {
+ xfs_agblock_t bb_leftsib;
+ xfs_agblock_t bb_rightsib;
+ } s; /* short form pointers */
+ struct {
+ xfs_dfsbno_t bb_leftsib;
+ xfs_dfsbno_t bb_rightsib;
+ } l; /* long form pointers */
+ } bb_u; /* rest */
+} xfs_btree_block_t;
+
+/*
+ * For logging record fields.
+ */
+#define XFS_BB_MAGIC 0x01
+#define XFS_BB_LEVEL 0x02
+#define XFS_BB_NUMRECS 0x04
+#define XFS_BB_LEFTSIB 0x08
+#define XFS_BB_RIGHTSIB 0x10
+#define XFS_BB_NUM_BITS 5
+#define XFS_BB_ALL_BITS ((1 << XFS_BB_NUM_BITS) - 1)
+
+/*
+ * Boolean to select which form of xfs_btree_block_t.bb_u to use.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BTREE_LONG_PTRS)
+int xfs_btree_long_ptrs(xfs_btnum_t btnum);
+#define XFS_BTREE_LONG_PTRS(btnum) ((btnum) == XFS_BTNUM_BMAP)
+#else
+#define XFS_BTREE_LONG_PTRS(btnum) ((btnum) == XFS_BTNUM_BMAP)
+#endif
+
+/*
+ * Magic numbers for btree blocks.
+ */
+extern const __uint32_t xfs_magics[];
+
+/*
+ * Maximum and minimum records in a btree block.
+ * Given block size, type prefix, and leaf flag (0 or 1).
+ * The divisor below is equivalent to lf ? (e1) : (e2) but that produces
+ * compiler warnings.
+ */
+#define XFS_BTREE_BLOCK_MAXRECS(bsz,t,lf) \
+ ((int)(((bsz) - (uint)sizeof(t ## _block_t)) / \
+ (((lf) * (uint)sizeof(t ## _rec_t)) + \
+ ((1 - (lf)) * \
+ ((uint)sizeof(t ## _key_t) + (uint)sizeof(t ## _ptr_t))))))
+#define XFS_BTREE_BLOCK_MINRECS(bsz,t,lf) \
+ (XFS_BTREE_BLOCK_MAXRECS(bsz,t,lf) / 2)
+
+/*
+ * Record, key, and pointer address calculation macros.
+ * Given block size, type prefix, block pointer, and index of requested entry
+ * (first entry numbered 1).
+ */
+#define XFS_BTREE_REC_ADDR(bsz,t,bb,i,mxr) \
+ ((t ## _rec_t *)((char *)(bb) + sizeof(t ## _block_t) + \
+ ((i) - 1) * sizeof(t ## _rec_t)))
+#define XFS_BTREE_KEY_ADDR(bsz,t,bb,i,mxr) \
+ ((t ## _key_t *)((char *)(bb) + sizeof(t ## _block_t) + \
+ ((i) - 1) * sizeof(t ## _key_t)))
+#define XFS_BTREE_PTR_ADDR(bsz,t,bb,i,mxr) \
+ ((t ## _ptr_t *)((char *)(bb) + sizeof(t ## _block_t) + \
+ (mxr) * sizeof(t ## _key_t) + ((i) - 1) * sizeof(t ## _ptr_t)))
+
+#define XFS_BTREE_MAXLEVELS 8 /* max of all btrees */
+
+/*
+ * Btree cursor structure.
+ * This collects all information needed by the btree code in one place.
+ */
+typedef struct xfs_btree_cur
+{
+ struct xfs_trans *bc_tp; /* transaction we're in, if any */
+ struct xfs_mount *bc_mp; /* file system mount struct */
+ union {
+ xfs_alloc_rec_t a;
+ xfs_bmbt_irec_t b;
+ xfs_inobt_rec_t i;
+ } bc_rec; /* current insert/search record value */
+ struct xfs_buf *bc_bufs[XFS_BTREE_MAXLEVELS]; /* buf ptr per level */
+ int bc_ptrs[XFS_BTREE_MAXLEVELS]; /* key/record # */
+ __uint8_t bc_ra[XFS_BTREE_MAXLEVELS]; /* readahead bits */
+#define XFS_BTCUR_LEFTRA 1 /* left sibling has been read-ahead */
+#define XFS_BTCUR_RIGHTRA 2 /* right sibling has been read-ahead */
+ __uint8_t bc_nlevels; /* number of levels in the tree */
+ __uint8_t bc_blocklog; /* log2(blocksize) of btree blocks */
+ xfs_btnum_t bc_btnum; /* identifies which btree type */
+ union {
+ struct { /* needed for BNO, CNT */
+ struct xfs_buf *agbp; /* agf buffer pointer */
+ xfs_agnumber_t agno; /* ag number */
+ } a;
+ struct { /* needed for BMAP */
+ struct xfs_inode *ip; /* pointer to our inode */
+ struct xfs_bmap_free *flist; /* list to free after */
+ xfs_fsblock_t firstblock; /* 1st blk allocated */
+ int allocated; /* count of alloced */
+ short forksize; /* fork's inode space */
+ char whichfork; /* data or attr fork */
+ char flags; /* flags */
+#define XFS_BTCUR_BPRV_WASDEL 1 /* was delayed */
+ } b;
+ struct { /* needed for INO */
+ struct xfs_buf *agbp; /* agi buffer pointer */
+ xfs_agnumber_t agno; /* ag number */
+ } i;
+ } bc_private; /* per-btree type data */
+} xfs_btree_cur_t;
+
+#define XFS_BTREE_NOERROR 0
+#define XFS_BTREE_ERROR 1
+
+/*
+ * Convert from buffer to btree block header.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_BLOCK)
+xfs_btree_block_t *xfs_buf_to_block(struct xfs_buf *bp);
+#define XFS_BUF_TO_BLOCK(bp) xfs_buf_to_block(bp)
+#else
+#define XFS_BUF_TO_BLOCK(bp) ((xfs_btree_block_t *)(XFS_BUF_PTR(bp)))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_LBLOCK)
+xfs_btree_lblock_t *xfs_buf_to_lblock(struct xfs_buf *bp);
+#define XFS_BUF_TO_LBLOCK(bp) xfs_buf_to_lblock(bp)
+#else
+#define XFS_BUF_TO_LBLOCK(bp) ((xfs_btree_lblock_t *)(XFS_BUF_PTR(bp)))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BUF_TO_SBLOCK)
+xfs_btree_sblock_t *xfs_buf_to_sblock(struct xfs_buf *bp);
+#define XFS_BUF_TO_SBLOCK(bp) xfs_buf_to_sblock(bp)
+#else
+#define XFS_BUF_TO_SBLOCK(bp) ((xfs_btree_sblock_t *)(XFS_BUF_PTR(bp)))
+#endif
+
+#ifdef __KERNEL__
+
+#ifdef DEBUG
+/*
+ * Debug routine: check that block header is ok.
+ */
+void
+xfs_btree_check_block(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ xfs_btree_block_t *block, /* generic btree block pointer */
+ int level, /* level of the btree block */
+ struct xfs_buf *bp); /* buffer containing block, if any */
+
+/*
+ * Debug routine: check that keys are in the right order.
+ */
+void
+xfs_btree_check_key(
+ xfs_btnum_t btnum, /* btree identifier */
+ void *ak1, /* pointer to left (lower) key */
+ void *ak2); /* pointer to right (higher) key */
+
+/*
+ * Debug routine: check that records are in the right order.
+ */
+void
+xfs_btree_check_rec(
+ xfs_btnum_t btnum, /* btree identifier */
+ void *ar1, /* pointer to left (lower) record */
+ void *ar2); /* pointer to right (higher) record */
+#else
+#define xfs_btree_check_block(a,b,c,d)
+#define xfs_btree_check_key(a,b,c)
+#define xfs_btree_check_rec(a,b,c)
+#endif /* DEBUG */
+
+/*
+ * Checking routine: check that long form block header is ok.
+ */
+int /* error (0 or EFSCORRUPTED) */
+xfs_btree_check_lblock(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ xfs_btree_lblock_t *block, /* btree long form block pointer */
+ int level, /* level of the btree block */
+ struct xfs_buf *bp); /* buffer containing block, if any */
+
+/*
+ * Checking routine: check that (long) pointer is ok.
+ */
+int /* error (0 or EFSCORRUPTED) */
+xfs_btree_check_lptr(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ xfs_dfsbno_t ptr, /* btree block disk address */
+ int level); /* btree block level */
+
+/*
+ * Checking routine: check that short form block header is ok.
+ */
+int /* error (0 or EFSCORRUPTED) */
+xfs_btree_check_sblock(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ xfs_btree_sblock_t *block, /* btree short form block pointer */
+ int level, /* level of the btree block */
+ struct xfs_buf *bp); /* buffer containing block */
+
+/*
+ * Checking routine: check that (short) pointer is ok.
+ */
+int /* error (0 or EFSCORRUPTED) */
+xfs_btree_check_sptr(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ xfs_agblock_t ptr, /* btree block disk address */
+ int level); /* btree block level */
+
+/*
+ * Delete the btree cursor.
+ */
+void
+xfs_btree_del_cursor(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ int error); /* del because of error */
+
+/*
+ * Duplicate the btree cursor.
+ * Allocate a new one, copy the record, re-get the buffers.
+ */
+int /* error */
+xfs_btree_dup_cursor(
+ xfs_btree_cur_t *cur, /* input cursor */
+ xfs_btree_cur_t **ncur);/* output cursor */
+
+/*
+ * Change the cursor to point to the first record in the current block
+ * at the given level. Other levels are unaffected.
+ */
+int /* success=1, failure=0 */
+xfs_btree_firstrec(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ int level); /* level to change */
+
+/*
+ * Retrieve the block pointer from the cursor at the given level.
+ * This may be a bmap btree root or from a buffer.
+ */
+xfs_btree_block_t * /* generic btree block pointer */
+xfs_btree_get_block(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ int level, /* level in btree */
+ struct xfs_buf **bpp); /* buffer containing the block */
+
+/*
+ * Get a buffer for the block, return it with no data read.
+ * Long-form addressing.
+ */
+struct xfs_buf * /* buffer for fsbno */
+xfs_btree_get_bufl(
+ struct xfs_mount *mp, /* file system mount point */
+ struct xfs_trans *tp, /* transaction pointer */
+ xfs_fsblock_t fsbno, /* file system block number */
+ uint lock); /* lock flags for get_buf */
+
+/*
+ * Get a buffer for the block, return it with no data read.
+ * Short-form addressing.
+ */
+struct xfs_buf * /* buffer for agno/agbno */
+xfs_btree_get_bufs(
+ struct xfs_mount *mp, /* file system mount point */
+ struct xfs_trans *tp, /* transaction pointer */
+ xfs_agnumber_t agno, /* allocation group number */
+ xfs_agblock_t agbno, /* allocation group block number */
+ uint lock); /* lock flags for get_buf */
+
+/*
+ * Allocate a new btree cursor.
+ * The cursor is either for allocation (A) or bmap (B).
+ */
+xfs_btree_cur_t * /* new btree cursor */
+xfs_btree_init_cursor(
+ struct xfs_mount *mp, /* file system mount point */
+ struct xfs_trans *tp, /* transaction pointer */
+ struct xfs_buf *agbp, /* (A only) buffer for agf structure */
+ xfs_agnumber_t agno, /* (A only) allocation group number */
+ xfs_btnum_t btnum, /* btree identifier */
+ struct xfs_inode *ip, /* (B only) inode owning the btree */
+ int whichfork); /* (B only) data/attr fork */
+
+/*
+ * Check for the cursor referring to the last block at the given level.
+ */
+int /* 1=is last block, 0=not last block */
+xfs_btree_islastblock(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ int level); /* level to check */
+
+/*
+ * Change the cursor to point to the last record in the current block
+ * at the given level. Other levels are unaffected.
+ */
+int /* success=1, failure=0 */
+xfs_btree_lastrec(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ int level); /* level to change */
+
+/*
+ * Compute first and last byte offsets for the fields given.
+ * Interprets the offsets table, which contains struct field offsets.
+ */
+void
+xfs_btree_offsets(
+ __int64_t fields, /* bitmask of fields */
+ const short *offsets,/* table of field offsets */
+ int nbits, /* number of bits to inspect */
+ int *first, /* output: first byte offset */
+ int *last); /* output: last byte offset */
+
+/*
+ * Get a buffer for the block, return it read in.
+ * Long-form addressing.
+ */
+int /* error */
+xfs_btree_read_bufl(
+ struct xfs_mount *mp, /* file system mount point */
+ struct xfs_trans *tp, /* transaction pointer */
+ xfs_fsblock_t fsbno, /* file system block number */
+ uint lock, /* lock flags for read_buf */
+ struct xfs_buf **bpp, /* buffer for fsbno */
+ int refval);/* ref count value for buffer */
+
+/*
+ * Get a buffer for the block, return it read in.
+ * Short-form addressing.
+ */
+int /* error */
+xfs_btree_read_bufs(
+ struct xfs_mount *mp, /* file system mount point */
+ struct xfs_trans *tp, /* transaction pointer */
+ xfs_agnumber_t agno, /* allocation group number */
+ xfs_agblock_t agbno, /* allocation group block number */
+ uint lock, /* lock flags for read_buf */
+ struct xfs_buf **bpp, /* buffer for agno/agbno */
+ int refval);/* ref count value for buffer */
+
+/*
+ * Read-ahead the block, don't wait for it, don't return a buffer.
+ * Long-form addressing.
+ */
+void /* error */
+xfs_btree_reada_bufl(
+ struct xfs_mount *mp, /* file system mount point */
+ xfs_fsblock_t fsbno, /* file system block number */
+ xfs_extlen_t count); /* count of filesystem blocks */
+
+/*
+ * Read-ahead the block, don't wait for it, don't return a buffer.
+ * Short-form addressing.
+ */
+void /* error */
+xfs_btree_reada_bufs(
+ struct xfs_mount *mp, /* file system mount point */
+ xfs_agnumber_t agno, /* allocation group number */
+ xfs_agblock_t agbno, /* allocation group block number */
+ xfs_extlen_t count); /* count of filesystem blocks */
+
+/*
+ * Read-ahead btree blocks, at the given level.
+ * Bits in lr are set from XFS_BTCUR_{LEFT,RIGHT}RA.
+ */
+int /* readahead block count */
+xfs_btree_readahead_core(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ int lev, /* level in btree */
+ int lr); /* left/right bits */
+
+static inline int /* readahead block count */
+xfs_btree_readahead(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ int lev, /* level in btree */
+ int lr) /* left/right bits */
+{
+ if ((cur->bc_ra[lev] | lr) == cur->bc_ra[lev])
+ return 0;
+
+ return xfs_btree_readahead_core(cur, lev, lr);
+}
+
+
+/*
+ * Set the buffer for level "lev" in the cursor to bp, releasing
+ * any previous buffer.
+ */
+void
+xfs_btree_setbuf(
+ xfs_btree_cur_t *cur, /* btree cursor */
+ int lev, /* level in btree */
+ struct xfs_buf *bp); /* new buffer to set */
+
+#endif /* __KERNEL__ */
+
+
+/*
+ * Min and max functions for extlen, agblock, fileoff, and filblks types.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_EXTLEN_MIN)
+xfs_extlen_t xfs_extlen_min(xfs_extlen_t a, xfs_extlen_t b);
+#define XFS_EXTLEN_MIN(a,b) xfs_extlen_min(a,b)
+#else
+#define XFS_EXTLEN_MIN(a,b) \
+ ((xfs_extlen_t)(a) < (xfs_extlen_t)(b) ? \
+ (xfs_extlen_t)(a) : (xfs_extlen_t)(b))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_EXTLEN_MAX)
+xfs_extlen_t xfs_extlen_max(xfs_extlen_t a, xfs_extlen_t b);
+#define XFS_EXTLEN_MAX(a,b) xfs_extlen_max(a,b)
+#else
+#define XFS_EXTLEN_MAX(a,b) \
+ ((xfs_extlen_t)(a) > (xfs_extlen_t)(b) ? \
+ (xfs_extlen_t)(a) : (xfs_extlen_t)(b))
+#endif
+
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGBLOCK_MIN)
+xfs_agblock_t xfs_agblock_min(xfs_agblock_t a, xfs_agblock_t b);
+#define XFS_AGBLOCK_MIN(a,b) xfs_agblock_min(a,b)
+#else
+#define XFS_AGBLOCK_MIN(a,b) \
+ ((xfs_agblock_t)(a) < (xfs_agblock_t)(b) ? \
+ (xfs_agblock_t)(a) : (xfs_agblock_t)(b))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_AGBLOCK_MAX)
+xfs_agblock_t xfs_agblock_max(xfs_agblock_t a, xfs_agblock_t b);
+#define XFS_AGBLOCK_MAX(a,b) xfs_agblock_max(a,b)
+#else
+#define XFS_AGBLOCK_MAX(a,b) \
+ ((xfs_agblock_t)(a) > (xfs_agblock_t)(b) ? \
+ (xfs_agblock_t)(a) : (xfs_agblock_t)(b))
+#endif
+
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FILEOFF_MIN)
+xfs_fileoff_t xfs_fileoff_min(xfs_fileoff_t a, xfs_fileoff_t b);
+#define XFS_FILEOFF_MIN(a,b) xfs_fileoff_min(a,b)
+#else
+#define XFS_FILEOFF_MIN(a,b) \
+ ((xfs_fileoff_t)(a) < (xfs_fileoff_t)(b) ? \
+ (xfs_fileoff_t)(a) : (xfs_fileoff_t)(b))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FILEOFF_MAX)
+xfs_fileoff_t xfs_fileoff_max(xfs_fileoff_t a, xfs_fileoff_t b);
+#define XFS_FILEOFF_MAX(a,b) xfs_fileoff_max(a,b)
+#else
+#define XFS_FILEOFF_MAX(a,b) \
+ ((xfs_fileoff_t)(a) > (xfs_fileoff_t)(b) ? \
+ (xfs_fileoff_t)(a) : (xfs_fileoff_t)(b))
+#endif
+
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FILBLKS_MIN)
+xfs_filblks_t xfs_filblks_min(xfs_filblks_t a, xfs_filblks_t b);
+#define XFS_FILBLKS_MIN(a,b) xfs_filblks_min(a,b)
+#else
+#define XFS_FILBLKS_MIN(a,b) \
+ ((xfs_filblks_t)(a) < (xfs_filblks_t)(b) ? \
+ (xfs_filblks_t)(a) : (xfs_filblks_t)(b))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FILBLKS_MAX)
+xfs_filblks_t xfs_filblks_max(xfs_filblks_t a, xfs_filblks_t b);
+#define XFS_FILBLKS_MAX(a,b) xfs_filblks_max(a,b)
+#else
+#define XFS_FILBLKS_MAX(a,b) \
+ ((xfs_filblks_t)(a) > (xfs_filblks_t)(b) ? \
+ (xfs_filblks_t)(a) : (xfs_filblks_t)(b))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FSB_SANITY_CHECK)
+int xfs_fsb_sanity_check(struct xfs_mount *mp, xfs_fsblock_t fsb);
+#define XFS_FSB_SANITY_CHECK(mp,fsb) xfs_fsb_sanity_check(mp,fsb)
+#else
+#define XFS_FSB_SANITY_CHECK(mp,fsb) \
+ (XFS_FSB_TO_AGNO(mp, fsb) < mp->m_sb.sb_agcount && \
+ XFS_FSB_TO_AGBNO(mp, fsb) < mp->m_sb.sb_agblocks)
+#endif
+
+/*
+ * Macros to set EFSCORRUPTED & return/branch.
+ */
+#define XFS_WANT_CORRUPTED_GOTO(x,l) \
+ { \
+ int fs_is_ok = (x); \
+ ASSERT(fs_is_ok); \
+ if (unlikely(!fs_is_ok)) { \
+ XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_GOTO", \
+ XFS_ERRLEVEL_LOW, NULL); \
+ error = XFS_ERROR(EFSCORRUPTED); \
+ goto l; \
+ } \
+ }
+
+#define XFS_WANT_CORRUPTED_RETURN(x) \
+ { \
+ int fs_is_ok = (x); \
+ ASSERT(fs_is_ok); \
+ if (unlikely(!fs_is_ok)) { \
+ XFS_ERROR_REPORT("XFS_WANT_CORRUPTED_RETURN", \
+ XFS_ERRLEVEL_LOW, NULL); \
+ return XFS_ERROR(EFSCORRUPTED); \
+ } \
+ }
+
+#endif /* __XFS_BTREE_H__ */