forked from Minki/linux
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!
244 lines
7.9 KiB
C
244 lines
7.9 KiB
C
/*
|
|
* 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_SF_H__
|
|
#define __XFS_DIR2_SF_H__
|
|
|
|
/*
|
|
* Directory layout when stored internal to an inode.
|
|
*
|
|
* Small directories are packed as tightly as possible so as to
|
|
* fit into the literal area of the inode.
|
|
*/
|
|
|
|
struct uio;
|
|
struct xfs_dabuf;
|
|
struct xfs_da_args;
|
|
struct xfs_dir2_block;
|
|
struct xfs_inode;
|
|
struct xfs_mount;
|
|
struct xfs_trans;
|
|
|
|
/*
|
|
* Maximum size of a shortform directory.
|
|
*/
|
|
#define XFS_DIR2_SF_MAX_SIZE \
|
|
(XFS_DINODE_MAX_SIZE - (uint)sizeof(xfs_dinode_core_t) - \
|
|
(uint)sizeof(xfs_agino_t))
|
|
|
|
/*
|
|
* Inode number stored as 8 8-bit values.
|
|
*/
|
|
typedef struct { __uint8_t i[8]; } xfs_dir2_ino8_t;
|
|
|
|
/*
|
|
* Inode number stored as 4 8-bit values.
|
|
* Works a lot of the time, when all the inode numbers in a directory
|
|
* fit in 32 bits.
|
|
*/
|
|
typedef struct { __uint8_t i[4]; } xfs_dir2_ino4_t;
|
|
|
|
typedef union {
|
|
xfs_dir2_ino8_t i8;
|
|
xfs_dir2_ino4_t i4;
|
|
} xfs_dir2_inou_t;
|
|
#define XFS_DIR2_MAX_SHORT_INUM ((xfs_ino_t)0xffffffffULL)
|
|
|
|
/*
|
|
* Normalized offset (in a data block) of the entry, really xfs_dir2_data_off_t.
|
|
* Only need 16 bits, this is the byte offset into the single block form.
|
|
*/
|
|
typedef struct { __uint8_t i[2]; } xfs_dir2_sf_off_t;
|
|
|
|
/*
|
|
* The parent directory has a dedicated field, and the self-pointer must
|
|
* be calculated on the fly.
|
|
*
|
|
* Entries are packed toward the top as tightly as possible. The header
|
|
* and the elements must be memcpy'd out into a work area to get correct
|
|
* alignment for the inode number fields.
|
|
*/
|
|
typedef struct xfs_dir2_sf_hdr {
|
|
__uint8_t count; /* count of entries */
|
|
__uint8_t i8count; /* count of 8-byte inode #s */
|
|
xfs_dir2_inou_t parent; /* parent dir inode number */
|
|
} xfs_dir2_sf_hdr_t;
|
|
|
|
typedef struct xfs_dir2_sf_entry {
|
|
__uint8_t namelen; /* actual name length */
|
|
xfs_dir2_sf_off_t offset; /* saved offset */
|
|
__uint8_t name[1]; /* name, variable size */
|
|
xfs_dir2_inou_t inumber; /* inode number, var. offset */
|
|
} xfs_dir2_sf_entry_t;
|
|
|
|
typedef struct xfs_dir2_sf {
|
|
xfs_dir2_sf_hdr_t hdr; /* shortform header */
|
|
xfs_dir2_sf_entry_t list[1]; /* shortform entries */
|
|
} xfs_dir2_sf_t;
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_HDR_SIZE)
|
|
int xfs_dir2_sf_hdr_size(int i8count);
|
|
#define XFS_DIR2_SF_HDR_SIZE(i8count) xfs_dir2_sf_hdr_size(i8count)
|
|
#else
|
|
#define XFS_DIR2_SF_HDR_SIZE(i8count) \
|
|
((uint)sizeof(xfs_dir2_sf_hdr_t) - \
|
|
((i8count) == 0) * \
|
|
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
|
|
#endif
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_INUMBERP)
|
|
xfs_dir2_inou_t *xfs_dir2_sf_inumberp(xfs_dir2_sf_entry_t *sfep);
|
|
#define XFS_DIR2_SF_INUMBERP(sfep) xfs_dir2_sf_inumberp(sfep)
|
|
#else
|
|
#define XFS_DIR2_SF_INUMBERP(sfep) \
|
|
((xfs_dir2_inou_t *)&(sfep)->name[(sfep)->namelen])
|
|
#endif
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_GET_INUMBER)
|
|
xfs_intino_t xfs_dir2_sf_get_inumber(xfs_dir2_sf_t *sfp, xfs_dir2_inou_t *from);
|
|
#define XFS_DIR2_SF_GET_INUMBER(sfp, from) \
|
|
xfs_dir2_sf_get_inumber(sfp, from)
|
|
|
|
#else
|
|
#define XFS_DIR2_SF_GET_INUMBER(sfp, from) \
|
|
((sfp)->hdr.i8count == 0 ? \
|
|
(xfs_intino_t)XFS_GET_DIR_INO4((from)->i4) : \
|
|
(xfs_intino_t)XFS_GET_DIR_INO8((from)->i8))
|
|
#endif
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_INUMBER)
|
|
void xfs_dir2_sf_put_inumber(xfs_dir2_sf_t *sfp, xfs_ino_t *from,
|
|
xfs_dir2_inou_t *to);
|
|
#define XFS_DIR2_SF_PUT_INUMBER(sfp,from,to) \
|
|
xfs_dir2_sf_put_inumber(sfp,from,to)
|
|
#else
|
|
#define XFS_DIR2_SF_PUT_INUMBER(sfp,from,to) \
|
|
if ((sfp)->hdr.i8count == 0) { \
|
|
XFS_PUT_DIR_INO4(*(from), (to)->i4); \
|
|
} else { \
|
|
XFS_PUT_DIR_INO8(*(from), (to)->i8); \
|
|
}
|
|
#endif
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_GET_OFFSET)
|
|
xfs_dir2_data_aoff_t xfs_dir2_sf_get_offset(xfs_dir2_sf_entry_t *sfep);
|
|
#define XFS_DIR2_SF_GET_OFFSET(sfep) \
|
|
xfs_dir2_sf_get_offset(sfep)
|
|
#else
|
|
#define XFS_DIR2_SF_GET_OFFSET(sfep) \
|
|
INT_GET_UNALIGNED_16_BE(&(sfep)->offset.i)
|
|
#endif
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_PUT_OFFSET)
|
|
void xfs_dir2_sf_put_offset(xfs_dir2_sf_entry_t *sfep,
|
|
xfs_dir2_data_aoff_t off);
|
|
#define XFS_DIR2_SF_PUT_OFFSET(sfep,off) \
|
|
xfs_dir2_sf_put_offset(sfep,off)
|
|
#else
|
|
#define XFS_DIR2_SF_PUT_OFFSET(sfep,off) \
|
|
INT_SET_UNALIGNED_16_BE(&(sfep)->offset.i,off)
|
|
#endif
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_ENTSIZE_BYNAME)
|
|
int xfs_dir2_sf_entsize_byname(xfs_dir2_sf_t *sfp, int len);
|
|
#define XFS_DIR2_SF_ENTSIZE_BYNAME(sfp,len) \
|
|
xfs_dir2_sf_entsize_byname(sfp,len)
|
|
#else
|
|
#define XFS_DIR2_SF_ENTSIZE_BYNAME(sfp,len) /* space a name uses */ \
|
|
((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (len) - \
|
|
((sfp)->hdr.i8count == 0) * \
|
|
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
|
|
#endif
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_ENTSIZE_BYENTRY)
|
|
int xfs_dir2_sf_entsize_byentry(xfs_dir2_sf_t *sfp, xfs_dir2_sf_entry_t *sfep);
|
|
#define XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep) \
|
|
xfs_dir2_sf_entsize_byentry(sfp,sfep)
|
|
#else
|
|
#define XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep) /* space an entry uses */ \
|
|
((uint)sizeof(xfs_dir2_sf_entry_t) - 1 + (sfep)->namelen - \
|
|
((sfp)->hdr.i8count == 0) * \
|
|
((uint)sizeof(xfs_dir2_ino8_t) - (uint)sizeof(xfs_dir2_ino4_t)))
|
|
#endif
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_FIRSTENTRY)
|
|
xfs_dir2_sf_entry_t *xfs_dir2_sf_firstentry(xfs_dir2_sf_t *sfp);
|
|
#define XFS_DIR2_SF_FIRSTENTRY(sfp) xfs_dir2_sf_firstentry(sfp)
|
|
#else
|
|
#define XFS_DIR2_SF_FIRSTENTRY(sfp) /* first entry in struct */ \
|
|
((xfs_dir2_sf_entry_t *) \
|
|
((char *)(sfp) + XFS_DIR2_SF_HDR_SIZE(sfp->hdr.i8count)))
|
|
#endif
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR2_SF_NEXTENTRY)
|
|
xfs_dir2_sf_entry_t *xfs_dir2_sf_nextentry(xfs_dir2_sf_t *sfp,
|
|
xfs_dir2_sf_entry_t *sfep);
|
|
#define XFS_DIR2_SF_NEXTENTRY(sfp,sfep) xfs_dir2_sf_nextentry(sfp,sfep)
|
|
#else
|
|
#define XFS_DIR2_SF_NEXTENTRY(sfp,sfep) /* next entry in struct */ \
|
|
((xfs_dir2_sf_entry_t *) \
|
|
((char *)(sfep) + XFS_DIR2_SF_ENTSIZE_BYENTRY(sfp,sfep)))
|
|
#endif
|
|
|
|
/*
|
|
* Functions.
|
|
*/
|
|
|
|
extern int
|
|
xfs_dir2_block_sfsize(struct xfs_inode *dp,
|
|
struct xfs_dir2_block *block,
|
|
xfs_dir2_sf_hdr_t *sfhp);
|
|
|
|
extern int
|
|
xfs_dir2_block_to_sf(struct xfs_da_args *args, struct xfs_dabuf *bp,
|
|
int size, xfs_dir2_sf_hdr_t *sfhp);
|
|
|
|
extern int
|
|
xfs_dir2_sf_addname(struct xfs_da_args *args);
|
|
|
|
extern int
|
|
xfs_dir2_sf_create(struct xfs_da_args *args, xfs_ino_t pino);
|
|
|
|
extern int
|
|
xfs_dir2_sf_getdents(struct xfs_inode *dp, struct uio *uio, int *eofp,
|
|
struct xfs_dirent *dbp, xfs_dir2_put_t put);
|
|
|
|
extern int
|
|
xfs_dir2_sf_lookup(struct xfs_da_args *args);
|
|
|
|
extern int
|
|
xfs_dir2_sf_removename(struct xfs_da_args *args);
|
|
|
|
extern int
|
|
xfs_dir2_sf_replace(struct xfs_da_args *args);
|
|
|
|
#endif /* __XFS_DIR2_SF_H__ */
|