trunk/lufis/dircache.h

/*
 * dircache.h
 * Copyright (C) 2002 Florin Malita <mali@go.ro>
 *
 * This file is part of LUFS, a free userspace filesystem implementation.
 * See http://lufs.sourceforge.net/ for updates.
 *
 * LUFS 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * LUFS is distributed in the hope that it will 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 to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _DIRCACHE_H_
#define _DIRCACHE_H_

#include <fuse.h>

#ifdef __cplusplus
extern "C" {
#endif


#define NBUCKETS        7
#define DEF_NENTRIES    6
#define DEF_TTL         20

struct list_head;

struct direntry{
    char                *e_name;
    char                *e_link;
    struct list_head    e_list;
    struct lufs_fattr   e_attr;
};

struct directory{
    char                *d_name;
    struct list_head    d_entries;
    struct list_head    d_list;
    unsigned long d_stamp;
};

struct dir_cache{
    int                 ttl;
    int                 entries;
    pthread_mutex_t     lock;
    struct list_head    buckets[NBUCKETS];
    int                 lengths[NBUCKETS];
};

struct dir_cache* lu_cache_create(struct list_head*);
void lu_cache_destroy(struct dir_cache*);

int lu_cache_lookup_file(struct dir_cache*, char*, struct lufs_fattr*, char*, int);
void lu_cache_add(struct dir_cache*, char*, char*, struct lufs_fattr*, char*);
int lu_cache_readdir(struct dir_cache *cache, char *dir,
                     fuse_dirh_t h, fuse_dirfil_t filler);
int lu_cache_invalidate(struct dir_cache*, char*);


#ifdef __cplusplus
}
#endif

#endif
1	dpavlin	4	/*
2			* dircache.h
3			* Copyright (C) 2002 Florin Malita <mali@go.ro>
4			*
5			* This file is part of LUFS, a free userspace filesystem implementation.
6			* See http://lufs.sourceforge.net/ for updates.
7			*
8			* LUFS is free software; you can redistribute it and/or modify
9			* it under the terms of the GNU General Public License as published by
10			* the Free Software Foundation; either version 2 of the License, or
11			* (at your option) any later version.
12			*
13			* LUFS is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			* GNU General Public License for more details.
17			*
18			* You should have received a copy of the GNU General Public License
19			* along with this program; if not, write to the Free Software
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21			*/
22
23			#ifndef _DIRCACHE_H_
24			#define _DIRCACHE_H_
25
26			#include <fuse.h>
27
28			#ifdef __cplusplus
29			extern "C" {
30			#endif
31
32
33			#define NBUCKETS 7
34			#define DEF_NENTRIES 6
35			#define DEF_TTL 20
36
37			struct list_head;
38
39			struct direntry{
40			char *e_name;
41			char *e_link;
42			struct list_head e_list;
43			struct lufs_fattr e_attr;
44			};
45
46			struct directory{
47			char *d_name;
48			struct list_head d_entries;
49			struct list_head d_list;
50			unsigned long d_stamp;
51			};
52
53			struct dir_cache{
54			int ttl;
55			int entries;
56			pthread_mutex_t lock;
57			struct list_head buckets[NBUCKETS];
58			int lengths[NBUCKETS];
59			};
60
61			struct dir_cache* lu_cache_create(struct list_head*);
62			void lu_cache_destroy(struct dir_cache*);
63
64			int lu_cache_lookup_file(struct dir_cache, char, struct lufs_fattr, char, int);
65			void lu_cache_add(struct dir_cache, char, char, struct lufs_fattr, char*);
66			int lu_cache_readdir(struct dir_cache cache, char dir,
67			fuse_dirh_t h, fuse_dirfil_t filler);
68			int lu_cache_invalidate(struct dir_cache, char);
69
70
71			#ifdef __cplusplus
72			}
73			#endif
74
75			#endif