cachefs_filegrp.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1996-1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _SYS_FS_CACHEFS_FILEGRP_H
#define _SYS_FS_CACHEFS_FILEGRP_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
struct cachefs_metadata;
/*
* filegrp structure represents a group of front files.
*/
struct filegrp {
uint_t fg_flags; /* CFS_FS_* flags */
int fg_count; /* cnodes in group */
cfs_cid_t fg_id; /* starting id in group */
struct fscache *fg_fscp; /* back ptr to fscache */
struct cnode *fg_cnodelist; /* list of cnodes */
struct filegrp *fg_next; /* pointer to next */
struct vnode *fg_dirvp; /* filegrp directory vp */
struct vnode *fg_attrvp; /* attrcache vp */
struct attrcache_header *fg_header; /* Attrcache header */
struct attrcache_index *fg_offsets; /* ptr to indexes in header */
uchar_t *fg_alloclist; /* allocation bitmap */
int fg_headersize; /* attrcache header size */
int fg_filesize; /* size of attrcache file */
kmutex_t fg_mutex; /* filegrp contents/ac lock */
kmutex_t fg_cnodelock; /* cnode list lock */
};
typedef struct filegrp filegrp_t;
extern struct kmem_cache *cachefs_filegrp_cache;
/* fg_flags values */
#define CFS_FG_NOCACHE 0x1 /* no cache mode */
#define CFS_FG_ALLOC_ATTR 0x2 /* no attrcache file yet */
#define CFS_FG_UPDATED 0x4 /* attrcache modified */
#define CFS_FG_ALLOC_FILE 0x10 /* no front file dir yet */
#define CFS_FG_RL 0x20 /* no longer used */
#define CFS_FG_READ 0x40 /* attrcache can be read */
#define CFS_FG_WRITE 0x80 /* attrcache can be written */
int filegrp_cache_create(void *, void *, int);
void filegrp_cache_destroy(void *, void *);
filegrp_t *filegrp_create(struct fscache *fscp, cfs_cid_t *cidp);
void filegrp_destroy(filegrp_t *fgp);
int filegrp_allocattr(filegrp_t *fgp);
int filegrpdir_create(filegrp_t *fgp);
int filegrpdir_find(filegrp_t *fgp);
void filegrp_hold(filegrp_t *fgp);
void filegrp_rele(filegrp_t *fgp);
int filegrp_ffhold(filegrp_t *fgp);
void filegrp_ffrele(filegrp_t *fgp);
int filegrp_sync(filegrp_t *fgp);
int filegrp_read_metadata(filegrp_t *fgp, cfs_cid_t *cidp,
struct cachefs_metadata *mdp);
int filegrp_create_metadata(filegrp_t *fgp, struct cachefs_metadata *md,
cfs_cid_t *cidp);
int filegrp_write_metadata(filegrp_t *fgp, cfs_cid_t *cidp,
struct cachefs_metadata *mdp);
int filegrp_destroy_metadata(filegrp_t *fgp, cfs_cid_t *cidp);
int filegrp_cid_to_slot(filegrp_t *fgp, cfs_cid_t *cidp);
filegrp_t *filegrp_list_find(struct fscache *fscp, cfs_cid_t *cidp);
void filegrp_list_add(struct fscache *fscp, filegrp_t *fgp);
void filegrp_list_remove(struct fscache *fscp, filegrp_t *fgp);
void filegrp_list_gc(struct fscache *fscp);
void filegrp_list_enable_caching_ro(struct fscache *fscp);
void filegrp_list_enable_caching_rw(struct fscache *fscp);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_FS_CACHEFS_FILEGRP_H */