http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/xfs/xfs_dir2_node.h

/* * Copyright (c) 2000,2005 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms 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. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef __XFS_DIR2_NODE_H__ #define __XFS_DIR2_NODE_H__ /* * Directory version 2, btree node format structures */ struct uio; struct xfs_dabuf; struct xfs_da_args; struct xfs_da_state; struct xfs_da_state_blk; struct xfs_inode; struct xfs_trans; /* * Offset of the freespace index. */ #define XFS_DIR2_FREE_SPACE 2 #define XFS_DIR2_FREE_OFFSET (XFS_DIR2_FREE_SPACE * XFS_DIR2_SPACE_SIZE) #define XFS_DIR2_FREE_FIRSTDB(mp) \ XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_FREE_OFFSET) #define XFS_DIR2_FREE_MAGIC 0x58443246 /* XD2F */ typedef struct xfs_dir2_free_hdr { __uint32_t magic; /* XFS_DIR2_FREE_MAGIC */ __int32_t firstdb; /* db of first entry */ __int32_t nvalid; /* count of valid entries */ __int32_t nused; /* count of used entries */ } xfs_dir2_free_hdr_t; typedef struct xfs_dir2_free { xfs_dir2_free_hdr_t hdr; /* block header */ xfs_dir2_data_off_t bests[1]; /* best free counts */ /* unused entries are -1 */ } xfs_dir2_free_t; #define XFS_DIR2_MAX_FREE_BESTS(mp) \ (((mp)->m_dirblksize - (uint)sizeof(xfs_dir2_free_hdr_t)) / \ (uint)sizeof(xfs_dir2_data_off_t)) /* * Convert data space db to the corresponding free db. */ #define XFS_DIR2_DB_TO_FDB(mp,db) xfs_dir2_db_to_fdb(mp, db) static inline xfs_dir2_db_t xfs_dir2_db_to_fdb(struct xfs_mount *mp, xfs_dir2_db_t db) { return (XFS_DIR2_FREE_FIRSTDB(mp) + (db) / XFS_DIR2_MAX_FREE_BESTS(mp)); } /* * Convert data space db to the corresponding index in a free db. */ #define XFS_DIR2_DB_TO_FDINDEX(mp,db) xfs_dir2_db_to_fdindex(mp, db) static inline int xfs_dir2_db_to_fdindex(struct xfs_mount *mp, xfs_dir2_db_t db) { return ((db) % XFS_DIR2_MAX_FREE_BESTS(mp)); } extern void xfs_dir2_free_log_bests(struct xfs_trans *tp, struct xfs_dabuf *bp, int first, int last); extern int xfs_dir2_leaf_to_node(struct xfs_da_args *args, struct xfs_dabuf *lbp); extern xfs_dahash_t xfs_dir2_leafn_lasthash(struct xfs_dabuf *bp, int *count); extern int xfs_dir2_leafn_lookup_int(struct xfs_dabuf *bp, struct xfs_da_args *args, int *indexp, struct xfs_da_state *state); extern int xfs_dir2_leafn_order(struct xfs_dabuf *leaf1_bp, struct xfs_dabuf *leaf2_bp); extern int xfs_dir2_leafn_split(struct xfs_da_state *state, struct xfs_da_state_blk *oldblk, struct xfs_da_state_blk *newblk); extern int xfs_dir2_leafn_toosmall(struct xfs_da_state *state, int *action); extern void xfs_dir2_leafn_unbalance(struct xfs_da_state *state, struct xfs_da_state_blk *drop_blk, struct xfs_da_state_blk *save_blk); extern int xfs_dir2_node_addname(struct xfs_da_args *args); extern int xfs_dir2_node_lookup(struct xfs_da_args *args); extern int xfs_dir2_node_removename(struct xfs_da_args *args); extern int xfs_dir2_node_replace(struct xfs_da_args *args); extern int xfs_dir2_node_trim_free(struct xfs_da_args *args, xfs_fileoff_t fo, int *rvalp); #endif /* __XFS_DIR2_NODE_H__ */