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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_dir2_leaf.h
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_dir2_leaf.h')
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diff --git a/fs/xfs/xfs_dir2_leaf.h b/fs/xfs/xfs_dir2_leaf.h
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+++ b/fs/xfs/xfs_dir2_leaf.h
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+/*
+ * 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_DIR2_LEAF_H__
+#define __XFS_DIR2_LEAF_H__
+
+/*
+ * Directory version 2, leaf block structures.
+ */
+
+struct uio;
+struct xfs_dabuf;
+struct xfs_da_args;
+struct xfs_inode;
+struct xfs_mount;
+struct xfs_trans;
+
+/*
+ * Constants.
+ */
+
+/*
+ * Offset of the leaf/node space. First block in this space
+ * is the btree root.
+ */
+#define XFS_DIR2_LEAF_SPACE 1
+#define XFS_DIR2_LEAF_OFFSET (XFS_DIR2_LEAF_SPACE * XFS_DIR2_SPACE_SIZE)
+#define XFS_DIR2_LEAF_FIRSTDB(mp) \
+ XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_LEAF_OFFSET)
+
+/*
+ * Types.
+ */
+
+/*
+ * Offset in data space of a data entry.
+ */
+typedef __uint32_t xfs_dir2_dataptr_t;
+#define XFS_DIR2_MAX_DATAPTR ((xfs_dir2_dataptr_t)0xffffffff)
+#define XFS_DIR2_NULL_DATAPTR ((xfs_dir2_dataptr_t)0)
+
+/*
+ * Structures.
+ */
+
+/*
+ * Leaf block header.
+ */
+typedef struct xfs_dir2_leaf_hdr {
+ xfs_da_blkinfo_t info; /* header for da routines */
+ __uint16_t count; /* count of entries */
+ __uint16_t stale; /* count of stale entries */
+} xfs_dir2_leaf_hdr_t;
+
+/*
+ * Leaf block entry.
+ */
+typedef struct xfs_dir2_leaf_entry {
+ xfs_dahash_t hashval; /* hash value of name */
+ xfs_dir2_dataptr_t address; /* address of data entry */
+} xfs_dir2_leaf_entry_t;
+
+/*
+ * Leaf block tail.
+ */
+typedef struct xfs_dir2_leaf_tail {
+ __uint32_t bestcount;
+} xfs_dir2_leaf_tail_t;
+
+/*
+ * Leaf block.
+ * bests and tail are at the end of the block for single-leaf only
+ * (magic = XFS_DIR2_LEAF1_MAGIC not XFS_DIR2_LEAFN_MAGIC).
+ */
+typedef struct xfs_dir2_leaf {
+ xfs_dir2_leaf_hdr_t hdr; /* leaf header */
+ xfs_dir2_leaf_entry_t ents[1]; /* entries */
+ /* ... */
+ xfs_dir2_data_off_t bests[1]; /* best free counts */
+ xfs_dir2_leaf_tail_t tail; /* leaf tail */
+} xfs_dir2_leaf_t;
+
+/*
+ * Macros.
+ * The DB blocks are logical directory block numbers, not filesystem blocks.
+ */
+
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_MAX_LEAF_ENTS)
+int
+xfs_dir2_max_leaf_ents(struct xfs_mount *mp);
+#define XFS_DIR2_MAX_LEAF_ENTS(mp) \
+ xfs_dir2_max_leaf_ents(mp)
+#else
+#define XFS_DIR2_MAX_LEAF_ENTS(mp) \
+ ((int)(((mp)->m_dirblksize - (uint)sizeof(xfs_dir2_leaf_hdr_t)) / \
+ (uint)sizeof(xfs_dir2_leaf_entry_t)))
+#endif
+
+/*
+ * Get address of the bestcount field in the single-leaf block.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_LEAF_TAIL_P)
+xfs_dir2_leaf_tail_t *
+xfs_dir2_leaf_tail_p(struct xfs_mount *mp, xfs_dir2_leaf_t *lp);
+#define XFS_DIR2_LEAF_TAIL_P(mp,lp) \
+ xfs_dir2_leaf_tail_p(mp, lp)
+#else
+#define XFS_DIR2_LEAF_TAIL_P(mp,lp) \
+ ((xfs_dir2_leaf_tail_t *)\
+ ((char *)(lp) + (mp)->m_dirblksize - \
+ (uint)sizeof(xfs_dir2_leaf_tail_t)))
+#endif
+
+/*
+ * Get address of the bests array in the single-leaf block.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_LEAF_BESTS_P)
+xfs_dir2_data_off_t *
+xfs_dir2_leaf_bests_p(xfs_dir2_leaf_tail_t *ltp);
+#define XFS_DIR2_LEAF_BESTS_P(ltp) xfs_dir2_leaf_bests_p(ltp)
+#else
+#define XFS_DIR2_LEAF_BESTS_P(ltp) \
+ ((xfs_dir2_data_off_t *)(ltp) - INT_GET((ltp)->bestcount, ARCH_CONVERT))
+#endif
+
+/*
+ * Convert dataptr to byte in file space
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATAPTR_TO_BYTE)
+xfs_dir2_off_t
+xfs_dir2_dataptr_to_byte(struct xfs_mount *mp, xfs_dir2_dataptr_t dp);
+#define XFS_DIR2_DATAPTR_TO_BYTE(mp,dp) xfs_dir2_dataptr_to_byte(mp, dp)
+#else
+#define XFS_DIR2_DATAPTR_TO_BYTE(mp,dp) \
+ ((xfs_dir2_off_t)(dp) << XFS_DIR2_DATA_ALIGN_LOG)
+#endif
+
+/*
+ * Convert byte in file space to dataptr. It had better be aligned.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BYTE_TO_DATAPTR)
+xfs_dir2_dataptr_t
+xfs_dir2_byte_to_dataptr(struct xfs_mount *mp, xfs_dir2_off_t by);
+#define XFS_DIR2_BYTE_TO_DATAPTR(mp,by) xfs_dir2_byte_to_dataptr(mp,by)
+#else
+#define XFS_DIR2_BYTE_TO_DATAPTR(mp,by) \
+ ((xfs_dir2_dataptr_t)((by) >> XFS_DIR2_DATA_ALIGN_LOG))
+#endif
+
+/*
+ * Convert dataptr to a block number
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATAPTR_TO_DB)
+xfs_dir2_db_t
+xfs_dir2_dataptr_to_db(struct xfs_mount *mp, xfs_dir2_dataptr_t dp);
+#define XFS_DIR2_DATAPTR_TO_DB(mp,dp) xfs_dir2_dataptr_to_db(mp, dp)
+#else
+#define XFS_DIR2_DATAPTR_TO_DB(mp,dp) \
+ XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_DATAPTR_TO_BYTE(mp, dp))
+#endif
+
+/*
+ * Convert dataptr to a byte offset in a block
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATAPTR_TO_OFF)
+xfs_dir2_data_aoff_t
+xfs_dir2_dataptr_to_off(struct xfs_mount *mp, xfs_dir2_dataptr_t dp);
+#define XFS_DIR2_DATAPTR_TO_OFF(mp,dp) xfs_dir2_dataptr_to_off(mp, dp)
+#else
+#define XFS_DIR2_DATAPTR_TO_OFF(mp,dp) \
+ XFS_DIR2_BYTE_TO_OFF(mp, XFS_DIR2_DATAPTR_TO_BYTE(mp, dp))
+#endif
+
+/*
+ * Convert block and offset to byte in space
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DB_OFF_TO_BYTE)
+xfs_dir2_off_t
+xfs_dir2_db_off_to_byte(struct xfs_mount *mp, xfs_dir2_db_t db,
+ xfs_dir2_data_aoff_t o);
+#define XFS_DIR2_DB_OFF_TO_BYTE(mp,db,o) \
+ xfs_dir2_db_off_to_byte(mp, db, o)
+#else
+#define XFS_DIR2_DB_OFF_TO_BYTE(mp,db,o) \
+ (((xfs_dir2_off_t)(db) << \
+ ((mp)->m_sb.sb_blocklog + (mp)->m_sb.sb_dirblklog)) + (o))
+#endif
+
+/*
+ * Convert byte in space to (DB) block
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BYTE_TO_DB)
+xfs_dir2_db_t xfs_dir2_byte_to_db(struct xfs_mount *mp, xfs_dir2_off_t by);
+#define XFS_DIR2_BYTE_TO_DB(mp,by) xfs_dir2_byte_to_db(mp, by)
+#else
+#define XFS_DIR2_BYTE_TO_DB(mp,by) \
+ ((xfs_dir2_db_t)((by) >> \
+ ((mp)->m_sb.sb_blocklog + (mp)->m_sb.sb_dirblklog)))
+#endif
+
+/*
+ * Convert byte in space to (DA) block
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BYTE_TO_DA)
+xfs_dablk_t xfs_dir2_byte_to_da(struct xfs_mount *mp, xfs_dir2_off_t by);
+#define XFS_DIR2_BYTE_TO_DA(mp,by) xfs_dir2_byte_to_da(mp, by)
+#else
+#define XFS_DIR2_BYTE_TO_DA(mp,by) \
+ XFS_DIR2_DB_TO_DA(mp, XFS_DIR2_BYTE_TO_DB(mp, by))
+#endif
+
+/*
+ * Convert byte in space to offset in a block
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_BYTE_TO_OFF)
+xfs_dir2_data_aoff_t
+xfs_dir2_byte_to_off(struct xfs_mount *mp, xfs_dir2_off_t by);
+#define XFS_DIR2_BYTE_TO_OFF(mp,by) xfs_dir2_byte_to_off(mp, by)
+#else
+#define XFS_DIR2_BYTE_TO_OFF(mp,by) \
+ ((xfs_dir2_data_aoff_t)((by) & \
+ ((1 << ((mp)->m_sb.sb_blocklog + \
+ (mp)->m_sb.sb_dirblklog)) - 1)))
+#endif
+
+/*
+ * Convert block and offset to dataptr
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DB_OFF_TO_DATAPTR)
+xfs_dir2_dataptr_t
+xfs_dir2_db_off_to_dataptr(struct xfs_mount *mp, xfs_dir2_db_t db,
+ xfs_dir2_data_aoff_t o);
+#define XFS_DIR2_DB_OFF_TO_DATAPTR(mp,db,o) \
+ xfs_dir2_db_off_to_dataptr(mp, db, o)
+#else
+#define XFS_DIR2_DB_OFF_TO_DATAPTR(mp,db,o) \
+ XFS_DIR2_BYTE_TO_DATAPTR(mp, XFS_DIR2_DB_OFF_TO_BYTE(mp, db, o))
+#endif
+
+/*
+ * Convert block (DB) to block (dablk)
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DB_TO_DA)
+xfs_dablk_t xfs_dir2_db_to_da(struct xfs_mount *mp, xfs_dir2_db_t db);
+#define XFS_DIR2_DB_TO_DA(mp,db) xfs_dir2_db_to_da(mp, db)
+#else
+#define XFS_DIR2_DB_TO_DA(mp,db) \
+ ((xfs_dablk_t)((db) << (mp)->m_sb.sb_dirblklog))
+#endif
+
+/*
+ * Convert block (dablk) to block (DB)
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DA_TO_DB)
+xfs_dir2_db_t xfs_dir2_da_to_db(struct xfs_mount *mp, xfs_dablk_t da);
+#define XFS_DIR2_DA_TO_DB(mp,da) xfs_dir2_da_to_db(mp, da)
+#else
+#define XFS_DIR2_DA_TO_DB(mp,da) \
+ ((xfs_dir2_db_t)((da) >> (mp)->m_sb.sb_dirblklog))
+#endif
+
+/*
+ * Convert block (dablk) to byte offset in space
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DA_TO_BYTE)
+xfs_dir2_off_t xfs_dir2_da_to_byte(struct xfs_mount *mp, xfs_dablk_t da);
+#define XFS_DIR2_DA_TO_BYTE(mp,da) xfs_dir2_da_to_byte(mp, da)
+#else
+#define XFS_DIR2_DA_TO_BYTE(mp,da) \
+ XFS_DIR2_DB_OFF_TO_BYTE(mp, XFS_DIR2_DA_TO_DB(mp, da), 0)
+#endif
+
+/*
+ * Function declarations.
+ */
+
+extern int
+ xfs_dir2_block_to_leaf(struct xfs_da_args *args, struct xfs_dabuf *dbp);
+
+extern int
+ xfs_dir2_leaf_addname(struct xfs_da_args *args);
+
+extern void
+ xfs_dir2_leaf_compact(struct xfs_da_args *args, struct xfs_dabuf *bp);
+
+extern void
+ xfs_dir2_leaf_compact_x1(struct xfs_dabuf *bp, int *indexp,
+ int *lowstalep, int *highstalep, int *lowlogp,
+ int *highlogp);
+
+extern int
+ xfs_dir2_leaf_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
+ struct uio *uio, int *eofp, struct xfs_dirent *dbp,
+ xfs_dir2_put_t put);
+
+extern int
+ xfs_dir2_leaf_init(struct xfs_da_args *args, xfs_dir2_db_t bno,
+ struct xfs_dabuf **bpp, int magic);
+
+extern void
+ xfs_dir2_leaf_log_ents(struct xfs_trans *tp, struct xfs_dabuf *bp,
+ int first, int last);
+
+extern void
+ xfs_dir2_leaf_log_bests(struct xfs_trans *tp, struct xfs_dabuf *bp,
+ int first, int last);
+
+extern void
+ xfs_dir2_leaf_log_header(struct xfs_trans *tp, struct xfs_dabuf *bp);
+
+extern void
+ xfs_dir2_leaf_log_tail(struct xfs_trans *tp, struct xfs_dabuf *bp);
+
+extern int
+ xfs_dir2_leaf_lookup(struct xfs_da_args *args);
+
+extern int
+ xfs_dir2_leaf_removename(struct xfs_da_args *args);
+
+extern int
+ xfs_dir2_leaf_replace(struct xfs_da_args *args);
+
+extern int
+ xfs_dir2_leaf_search_hash(struct xfs_da_args *args,
+ struct xfs_dabuf *lbp);
+extern int
+ xfs_dir2_leaf_trim_data(struct xfs_da_args *args, struct xfs_dabuf *lbp, xfs_dir2_db_t db);
+
+extern int
+ xfs_dir2_node_to_leaf(struct xfs_da_state *state);
+
+#endif /* __XFS_DIR2_LEAF_H__ */