sharefs.h revision a237e38e9161f0acd6451439d4a7dd597e66291d
/*
* 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 _SHAREFS_SHAREFS_H
#define _SHAREFS_SHAREFS_H
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* This header provides service for the sharefs module.
*/
#include <sys/modctl.h>
#include <sys/vfs.h>
#include <sys/vnode.h>
#include <sys/gfs.h>
#include <sharefs/share.h>
#include <sharefs/sharetab.h>
#ifdef __cplusplus
extern "C" {
#endif
#define SHAREFS_ROOT "/etc/dfs"
#define SHAREFS_BASE "sharetab"
/*
* Lengths of strings.
*/
typedef struct sharefs_lens {
int shl_path;
int shl_res;
int shl_fstype;
int shl_opts;
int shl_descr;
} sharefs_lens_t;
/*
* VFS data object
*/
typedef struct sharefs_vfs {
vnode_t *sharefs_vfs_root;
} sharefs_vfs_t;
#define SHAREFS_NAME_MAX MAXNAMELEN
/*
* The lock ordering whenever sharefs_lock and sharetab_lock both
* need to be held is: sharefs_lock and then sharetab_lock.
*/
extern krwlock_t sharefs_lock; /* lock for the vnode ops */
extern sharetab_t *sharefs_sharetab; /* The sharetab. */
extern uint_t sharetab_count; /* How many shares? */
extern krwlock_t sharetab_lock; /* lock for the cached sharetab */
extern size_t sharetab_size; /* How big is the sharetab file? */
extern timestruc_t sharetab_mtime; /* Last mod to sharetab */
extern timestruc_t sharetab_snap_time; /* Last snap */
extern uint_t sharetab_generation; /* Which copy is it? */
#define SHAREFS_INO_FILE 0x80
extern vnode_t *sharefs_create_root_file(vfs_t *);
/*
* Sharetab file
*
* Note that even though the sharetab code does not explictly
* use 'sharefs_file', it is required by GFS that the first
* field of the private data be a gfs_file_t.
*/
typedef struct shnode_t {
gfs_file_t sharefs_file; /* gfs file */
char *sharefs_snap; /* snapshot of the share */
size_t sharefs_size; /* size of the snapshot */
uint_t sharefs_count; /* number of shares */
uint_t sharefs_refs; /* reference count */
uint_t sharefs_real_vp; /* Are we a real or snap */
uint_t sharefs_generation; /* Which copy are we? */
timestruc_t sharefs_snap_time; /* When were we modded? */
} shnode_t;
/*
* Some conversion macros:
*/
#define VTOSH(vp) ((shnode_t *)((vp)->v_data))
extern const fs_operation_def_t sharefs_tops_data[];
extern vnodeops_t *sharefs_ops_data;
extern void sharefs_data_init(void);
extern void sharefs_sharetab_init(void);
#ifdef __cplusplus
}
#endif
#endif /* !_SHAREFS_SHAREFS_H */