fmd_scheme.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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _FMD_SCHEME_H
#define _FMD_SCHEME_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <libnvpair.h>
#include <pthread.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Scheme operations. These function pointers are filled in when the scheme
* is loaded. New operations must be added here as well as to the default
* operations declaration and initialization table in fmd_scheme.c.
*/
typedef struct fmd_scheme_ops {
int (*sop_init)(void);
void (*sop_fini)(void);
ssize_t (*sop_nvl2str)(nvlist_t *, char *, size_t);
int (*sop_expand)(nvlist_t *);
int (*sop_present)(nvlist_t *);
int (*sop_unusable)(nvlist_t *);
int (*sop_contains)(nvlist_t *, nvlist_t *);
} fmd_scheme_ops_t;
typedef struct fmd_scheme_opd {
const char *opd_name; /* symbol name of scheme function */
size_t opd_off; /* offset within fmd_scheme_ops_t */
} fmd_scheme_opd_t;
typedef struct fmd_scheme {
struct fmd_scheme *sch_next; /* next scheme on hash bucket chain */
char *sch_name; /* name of this scheme (fmri prefix) */
void *sch_dlp; /* libdl(3DL) shared library handle */
pthread_mutex_t sch_lock; /* lock protecting cv, refs, loaded */
pthread_cond_t sch_cv; /* condition variable for sch_loaded */
uint_t sch_refs; /* scheme reference count */
uint_t sch_loaded; /* scheme has been loaded */
pthread_mutex_t sch_opslock; /* lock protecting non-init/fini ops */
fmd_scheme_ops_t sch_ops; /* scheme function pointers */
} fmd_scheme_t;
typedef struct fmd_scheme_hash {
pthread_rwlock_t sch_rwlock; /* rwlock protecting scheme hash */
fmd_scheme_t **sch_hash; /* hash bucket array of schemes */
uint_t sch_hashlen; /* length of hash bucket array */
char *sch_dirpath; /* directory path for schemes */
} fmd_scheme_hash_t;
extern fmd_scheme_hash_t *fmd_scheme_hash_create(const char *, const char *);
extern void fmd_scheme_hash_destroy(fmd_scheme_hash_t *);
extern void fmd_scheme_hash_trygc(fmd_scheme_hash_t *);
extern fmd_scheme_t *fmd_scheme_hash_lookup(fmd_scheme_hash_t *, const char *);
extern void fmd_scheme_hash_release(fmd_scheme_hash_t *, fmd_scheme_t *);
#ifdef __cplusplus
}
#endif
#endif /* _FMD_SCHEME_H */