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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_VFS_OPREG_H
#define _SYS_VFS_OPREG_H
#include <sys/vfs.h>
#include <sys/fem.h>
#ifdef __cplusplus
extern "C" {
#endif
#if defined(_KERNEL) || defined(_FAKE_KERNEL)
/*
* The following union allows us to use C99's "designated initializer"
* feature so that we can have strong typechecking for the operations
* used in the the fs_operation_def structures.
*/
typedef union fs_func {
fs_generic_func_p fs_generic; /* Generic function signature */
int (*error)(); /* Signature of error function */
VFS_OPS; /* Signatures of all vfs operations (vfsops) */
VNODE_OPS; /* Signatures of all vnode operations (vops) */
FEM_OPS; /* Signatures of all FEM operations (femops) */
FSEM_OPS; /* Signatures of all FSEM ops (fsemops) */
} fs_func_p;
/*
* File systems use arrays of fs_operation_def structures to form
* name/value pairs of operations. These arrays get passed to:
*
* - vn_make_ops() to create vnodeops
* - vfs_makefsops()/vfs_setfsops() to create vfsops.
*/
typedef struct fs_operation_def {
char *name; /* name of operation (NULL at end) */
fs_func_p func; /* function implementing operation */
} fs_operation_def_t;
/*
* The operation registration mechanism uses two master tables of operations:
* one for vnode operations (vn_ops_table[]) and one for vfs operations
* (vfs_ops_table[]). These tables are arrays of fs_operation_trans_def
* structures. They contain all of the information necessary for the system
* to populate an operations structure (e.g., vnodeops, vfsops).
*
* File systems call registration routines (vfs_setfsops(), vfs_makefsops(),
* and vn_make_ops()) and pass in their operations specification tables
* (arrays of fs_operation_def structures). These routines use the master
* table(s) of operations to build a vnodeops or vfsops structure.
*/
typedef struct fs_operation_trans_def {
char *name; /* name of operation (NULL at end) */
size_t offset; /* byte offset within ops vector */
fs_generic_func_p defaultFunc; /* default function */
fs_generic_func_p errorFunc; /* error function */
} fs_operation_trans_def_t;
/*
* Generic operations vector types (used for vfs/vnode ops registration).
*/
extern int fs_default(); /* "default" function placeholder */
extern int fs_error(); /* "error" function placeholder */
int fs_build_vector(void *vector, int *unused_ops,
const fs_operation_trans_def_t *translation,
const fs_operation_def_t *operations);
/*
* Public operations.
*/
int vn_make_ops(const char *, const struct fs_operation_def *,
vnodeops_t **);
void vn_freevnodeops(vnodeops_t *);
int vfs_setfsops(int, const fs_operation_def_t *, vfsops_t **);
int vfs_makefsops(const fs_operation_def_t *, vfsops_t **);
void vfs_freevfsops(vfsops_t *);
int vfs_freevfsops_by_type(int);
#endif /* _KERNEL || _FAKE_KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_VFS_OPREG_H */
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