173 строки
6.6 KiB
C
173 строки
6.6 KiB
C
/*
|
|
* 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_DIR_SF_H__
|
|
#define __XFS_DIR_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.
|
|
*/
|
|
|
|
typedef struct { __uint8_t i[sizeof(xfs_ino_t)]; } xfs_dir_ino_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 tight as possible. The header
|
|
* and the elements much be memcpy'd out into a work area to get correct
|
|
* alignment for the inode number fields.
|
|
*/
|
|
typedef struct xfs_dir_shortform {
|
|
struct xfs_dir_sf_hdr { /* constant-structure header block */
|
|
xfs_dir_ino_t parent; /* parent dir inode number */
|
|
__uint8_t count; /* count of active entries */
|
|
} hdr;
|
|
struct xfs_dir_sf_entry {
|
|
xfs_dir_ino_t inumber; /* referenced inode number */
|
|
__uint8_t namelen; /* actual length of name (no NULL) */
|
|
__uint8_t name[1]; /* name */
|
|
} list[1]; /* variable sized array */
|
|
} xfs_dir_shortform_t;
|
|
typedef struct xfs_dir_sf_hdr xfs_dir_sf_hdr_t;
|
|
typedef struct xfs_dir_sf_entry xfs_dir_sf_entry_t;
|
|
|
|
/*
|
|
* We generate this then sort it, so that readdirs are returned in
|
|
* hash-order. Else seekdir won't work.
|
|
*/
|
|
typedef struct xfs_dir_sf_sort {
|
|
__uint8_t entno; /* .=0, ..=1, else entry# + 2 */
|
|
__uint8_t seqno; /* sequence # with same hash value */
|
|
__uint8_t namelen; /* length of name value (no null) */
|
|
xfs_dahash_t hash; /* this entry's hash value */
|
|
xfs_intino_t ino; /* this entry's inode number */
|
|
char *name; /* name value, pointer into buffer */
|
|
} xfs_dir_sf_sort_t;
|
|
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_GET_DIRINO)
|
|
void xfs_dir_sf_get_dirino(xfs_dir_ino_t *from, xfs_ino_t *to);
|
|
#define XFS_DIR_SF_GET_DIRINO(from,to) xfs_dir_sf_get_dirino(from, to)
|
|
#else
|
|
#define XFS_DIR_SF_GET_DIRINO(from,to) (*(to) = XFS_GET_DIR_INO8(*from))
|
|
#endif
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_PUT_DIRINO)
|
|
void xfs_dir_sf_put_dirino(xfs_ino_t *from, xfs_dir_ino_t *to);
|
|
#define XFS_DIR_SF_PUT_DIRINO(from,to) xfs_dir_sf_put_dirino(from, to)
|
|
#else
|
|
#define XFS_DIR_SF_PUT_DIRINO(from,to) XFS_PUT_DIR_INO8(*(from), *(to))
|
|
#endif
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_ENTSIZE_BYNAME)
|
|
int xfs_dir_sf_entsize_byname(int len);
|
|
#define XFS_DIR_SF_ENTSIZE_BYNAME(len) xfs_dir_sf_entsize_byname(len)
|
|
#else
|
|
#define XFS_DIR_SF_ENTSIZE_BYNAME(len) /* space a name uses */ \
|
|
((uint)sizeof(xfs_dir_sf_entry_t)-1 + (len))
|
|
#endif
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_ENTSIZE_BYENTRY)
|
|
int xfs_dir_sf_entsize_byentry(xfs_dir_sf_entry_t *sfep);
|
|
#define XFS_DIR_SF_ENTSIZE_BYENTRY(sfep) xfs_dir_sf_entsize_byentry(sfep)
|
|
#else
|
|
#define XFS_DIR_SF_ENTSIZE_BYENTRY(sfep) /* space an entry uses */ \
|
|
((uint)sizeof(xfs_dir_sf_entry_t)-1 + (sfep)->namelen)
|
|
#endif
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_NEXTENTRY)
|
|
xfs_dir_sf_entry_t *xfs_dir_sf_nextentry(xfs_dir_sf_entry_t *sfep);
|
|
#define XFS_DIR_SF_NEXTENTRY(sfep) xfs_dir_sf_nextentry(sfep)
|
|
#else
|
|
#define XFS_DIR_SF_NEXTENTRY(sfep) /* next entry in struct */ \
|
|
((xfs_dir_sf_entry_t *) \
|
|
((char *)(sfep) + XFS_DIR_SF_ENTSIZE_BYENTRY(sfep)))
|
|
#endif
|
|
#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_ALLFIT)
|
|
int xfs_dir_sf_allfit(int count, int totallen);
|
|
#define XFS_DIR_SF_ALLFIT(count,totallen) \
|
|
xfs_dir_sf_allfit(count,totallen)
|
|
#else
|
|
#define XFS_DIR_SF_ALLFIT(count,totallen) /* will all entries fit? */ \
|
|
((uint)sizeof(xfs_dir_sf_hdr_t) + \
|
|
((uint)sizeof(xfs_dir_sf_entry_t)-1)*(count) + (totallen))
|
|
#endif
|
|
|
|
#if defined(XFS_DIR_TRACE)
|
|
|
|
/*
|
|
* Kernel tracing support for directories.
|
|
*/
|
|
struct uio;
|
|
struct xfs_inode;
|
|
struct xfs_da_intnode;
|
|
struct xfs_dinode;
|
|
struct xfs_dir_leafblock;
|
|
struct xfs_dir_leaf_entry;
|
|
|
|
#define XFS_DIR_TRACE_SIZE 4096 /* size of global trace buffer */
|
|
extern ktrace_t *xfs_dir_trace_buf;
|
|
|
|
/*
|
|
* Trace record types.
|
|
*/
|
|
#define XFS_DIR_KTRACE_G_DU 1 /* dp, uio */
|
|
#define XFS_DIR_KTRACE_G_DUB 2 /* dp, uio, bno */
|
|
#define XFS_DIR_KTRACE_G_DUN 3 /* dp, uio, node */
|
|
#define XFS_DIR_KTRACE_G_DUL 4 /* dp, uio, leaf */
|
|
#define XFS_DIR_KTRACE_G_DUE 5 /* dp, uio, leaf entry */
|
|
#define XFS_DIR_KTRACE_G_DUC 6 /* dp, uio, cookie */
|
|
|
|
void xfs_dir_trace_g_du(char *where, struct xfs_inode *dp, struct uio *uio);
|
|
void xfs_dir_trace_g_dub(char *where, struct xfs_inode *dp, struct uio *uio,
|
|
xfs_dablk_t bno);
|
|
void xfs_dir_trace_g_dun(char *where, struct xfs_inode *dp, struct uio *uio,
|
|
struct xfs_da_intnode *node);
|
|
void xfs_dir_trace_g_dul(char *where, struct xfs_inode *dp, struct uio *uio,
|
|
struct xfs_dir_leafblock *leaf);
|
|
void xfs_dir_trace_g_due(char *where, struct xfs_inode *dp, struct uio *uio,
|
|
struct xfs_dir_leaf_entry *entry);
|
|
void xfs_dir_trace_g_duc(char *where, struct xfs_inode *dp, struct uio *uio,
|
|
xfs_off_t cookie);
|
|
void xfs_dir_trace_enter(int type, char *where,
|
|
void *a0, void *a1, void *a2, void *a3,
|
|
void *a4, void *a5, void *a6, void *a7,
|
|
void *a8, void *a9, void *a10, void *a11);
|
|
#else
|
|
#define xfs_dir_trace_g_du(w,d,u)
|
|
#define xfs_dir_trace_g_dub(w,d,u,b)
|
|
#define xfs_dir_trace_g_dun(w,d,u,n)
|
|
#define xfs_dir_trace_g_dul(w,d,u,l)
|
|
#define xfs_dir_trace_g_due(w,d,u,e)
|
|
#define xfs_dir_trace_g_duc(w,d,u,c)
|
|
#endif /* DEBUG */
|
|
|
|
#endif /* __XFS_DIR_SF_H__ */
|