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Diffstat (limited to 'fs/xfs/xfs_dir2_data.h')
| -rw-r--r-- | fs/xfs/xfs_dir2_data.h | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/fs/xfs/xfs_dir2_data.h b/fs/xfs/xfs_dir2_data.h deleted file mode 100644 index 476cac920bf..00000000000 --- a/fs/xfs/xfs_dir2_data.h +++ /dev/null @@ -1,227 +0,0 @@ -/* - * Copyright (c) 2000 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_DATA_H__ -#define __XFS_DIR2_DATA_H__ - -/* - * Directory format 2, data block structures. - */ - -struct xfs_dabuf; -struct xfs_da_args; -struct xfs_inode; -struct xfs_trans; - -/* - * Constants. - */ -#define XFS_DIR2_DATA_MAGIC 0x58443244 /* XD2D: for multiblock dirs */ -#define XFS_DIR2_DATA_ALIGN_LOG 3 /* i.e., 8 bytes */ -#define XFS_DIR2_DATA_ALIGN (1 << XFS_DIR2_DATA_ALIGN_LOG) -#define XFS_DIR2_DATA_FREE_TAG 0xffff -#define XFS_DIR2_DATA_FD_COUNT 3 - -/* - * Directory address space divided into sections, - * spaces separated by 32gb. - */ -#define XFS_DIR2_SPACE_SIZE (1ULL << (32 + XFS_DIR2_DATA_ALIGN_LOG)) -#define XFS_DIR2_DATA_SPACE 0 -#define XFS_DIR2_DATA_OFFSET (XFS_DIR2_DATA_SPACE * XFS_DIR2_SPACE_SIZE) -#define XFS_DIR2_DATA_FIRSTDB(mp) \ - XFS_DIR2_BYTE_TO_DB(mp, XFS_DIR2_DATA_OFFSET) - -/* - * Offsets of . and .. in data space (always block 0) - */ -#define XFS_DIR2_DATA_DOT_OFFSET \ - ((xfs_dir2_data_aoff_t)sizeof(xfs_dir2_data_hdr_t)) -#define XFS_DIR2_DATA_DOTDOT_OFFSET \ - (XFS_DIR2_DATA_DOT_OFFSET + XFS_DIR2_DATA_ENTSIZE(1)) -#define XFS_DIR2_DATA_FIRST_OFFSET \ - (XFS_DIR2_DATA_DOTDOT_OFFSET + XFS_DIR2_DATA_ENTSIZE(2)) - -/* - * Structures. - */ - -/* - * Describe a free area in the data block. - * The freespace will be formatted as a xfs_dir2_data_unused_t. - */ -typedef struct xfs_dir2_data_free { - xfs_dir2_data_off_t offset; /* start of freespace */ - xfs_dir2_data_off_t length; /* length of freespace */ -} xfs_dir2_data_free_t; - -/* - * Header for the data blocks. - * Always at the beginning of a directory-sized block. - * The code knows that XFS_DIR2_DATA_FD_COUNT is 3. - */ -typedef struct xfs_dir2_data_hdr { - __uint32_t magic; /* XFS_DIR2_DATA_MAGIC */ - /* or XFS_DIR2_BLOCK_MAGIC */ - xfs_dir2_data_free_t bestfree[XFS_DIR2_DATA_FD_COUNT]; -} xfs_dir2_data_hdr_t; - -/* - * Active entry in a data block. Aligned to 8 bytes. - * Tag appears as the last 2 bytes. - */ -typedef struct xfs_dir2_data_entry { - xfs_ino_t inumber; /* inode number */ - __uint8_t namelen; /* name length */ - __uint8_t name[1]; /* name bytes, no null */ - /* variable offset */ - xfs_dir2_data_off_t tag; /* starting offset of us */ -} xfs_dir2_data_entry_t; - -/* - * Unused entry in a data block. Aligned to 8 bytes. - * Tag appears as the last 2 bytes. - */ -typedef struct xfs_dir2_data_unused { - __uint16_t freetag; /* XFS_DIR2_DATA_FREE_TAG */ - xfs_dir2_data_off_t length; /* total free length */ - /* variable offset */ - xfs_dir2_data_off_t tag; /* starting offset of us */ -} xfs_dir2_data_unused_t; - -typedef union { - xfs_dir2_data_entry_t entry; - xfs_dir2_data_unused_t unused; -} xfs_dir2_data_union_t; - -/* - * Generic data block structure, for xfs_db. - */ -typedef struct xfs_dir2_data { - xfs_dir2_data_hdr_t hdr; /* magic XFS_DIR2_DATA_MAGIC */ - xfs_dir2_data_union_t u[1]; -} xfs_dir2_data_t; - -/* - * Macros. - */ - -/* - * Size of a data entry. - */ -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATA_ENTSIZE) -int xfs_dir2_data_entsize(int n); -#define XFS_DIR2_DATA_ENTSIZE(n) xfs_dir2_data_entsize(n) -#else -#define XFS_DIR2_DATA_ENTSIZE(n) \ - ((int)(roundup(offsetof(xfs_dir2_data_entry_t, name[0]) + (n) + \ - (uint)sizeof(xfs_dir2_data_off_t), XFS_DIR2_DATA_ALIGN))) -#endif - -/* - * Pointer to an entry's tag word. - */ -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATA_ENTRY_TAG_P) -xfs_dir2_data_off_t *xfs_dir2_data_entry_tag_p(xfs_dir2_data_entry_t *dep); -#define XFS_DIR2_DATA_ENTRY_TAG_P(dep) xfs_dir2_data_entry_tag_p(dep) -#else -#define XFS_DIR2_DATA_ENTRY_TAG_P(dep) \ - ((xfs_dir2_data_off_t *)\ - ((char *)(dep) + XFS_DIR2_DATA_ENTSIZE((dep)->namelen) - \ - (uint)sizeof(xfs_dir2_data_off_t))) -#endif - -/* - * Pointer to a freespace's tag word. - */ -#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_DATA_UNUSED_TAG_P) -xfs_dir2_data_off_t *xfs_dir2_data_unused_tag_p(xfs_dir2_data_unused_t *dup); -#define XFS_DIR2_DATA_UNUSED_TAG_P(dup) \ - xfs_dir2_data_unused_tag_p(dup) -#else -#define XFS_DIR2_DATA_UNUSED_TAG_P(dup) \ - ((xfs_dir2_data_off_t *)\ - ((char *)(dup) + INT_GET((dup)->length, ARCH_CONVERT) \ - - (uint)sizeof(xfs_dir2_data_off_t))) -#endif - -/* - * Function declarations. - */ - -#ifdef DEBUG -extern void - xfs_dir2_data_check(struct xfs_inode *dp, struct xfs_dabuf *bp); -#else -#define xfs_dir2_data_check(dp,bp) -#endif - -extern xfs_dir2_data_free_t * - xfs_dir2_data_freefind(xfs_dir2_data_t *d, - xfs_dir2_data_unused_t *dup); - -extern xfs_dir2_data_free_t * - xfs_dir2_data_freeinsert(xfs_dir2_data_t *d, - xfs_dir2_data_unused_t *dup, int *loghead); - -extern void - xfs_dir2_data_freescan(struct xfs_mount *mp, xfs_dir2_data_t *d, - int *loghead, char *aendp); - -extern int - xfs_dir2_data_init(struct xfs_da_args *args, xfs_dir2_db_t blkno, - struct xfs_dabuf **bpp); - -extern void - xfs_dir2_data_log_entry(struct xfs_trans *tp, struct xfs_dabuf *bp, - xfs_dir2_data_entry_t *dep); - -extern void - xfs_dir2_data_log_header(struct xfs_trans *tp, struct xfs_dabuf *bp); - -extern void - xfs_dir2_data_log_unused(struct xfs_trans *tp, struct xfs_dabuf *bp, - xfs_dir2_data_unused_t *dup); - -extern void - xfs_dir2_data_make_free(struct xfs_trans *tp, struct xfs_dabuf *bp, - xfs_dir2_data_aoff_t offset, - xfs_dir2_data_aoff_t len, int *needlogp, - int *needscanp); - -extern void - xfs_dir2_data_use_free(struct xfs_trans *tp, struct xfs_dabuf *bp, - xfs_dir2_data_unused_t *dup, - xfs_dir2_data_aoff_t offset, - xfs_dir2_data_aoff_t len, int *needlogp, - int *needscanp); - -#endif /* __XFS_DIR2_DATA_H__ */ |