common/sys/share.h

	share.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) 1996-1998,2001 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#ifndef _SYS_SHARE_H
#define _SYS_SHARE_H

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/types.h>

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * Maximum size of a shrlock owner.
 * Must be large enough to handle a netobj.
 */
#define MAX_SHR_OWNER_LEN   1024

/*
 * Contents of shrlock owner field for local share requests
 */
struct shr_locowner {
    pid_t   sl_pid;
    int sl_id;
};

struct shrlock {
    short   s_access;
    short   s_deny;
    int32_t s_sysid;    /* 0 if local otherwise passed by lm */
    pid_t   s_pid;      /* 0 if remote otherwise local pid */
    int s_own_len;  /* if 0 and F_UNSHARE matching sysid */
    caddr_t s_owner;    /* variable length opaque owner */
};

struct shrlocklist {
    struct shrlock *shr;
    struct shrlocklist *next;
};

#if defined(_KERNEL)
struct flock64;

extern int add_share(struct vnode *, struct shrlock *);
extern int del_share(struct vnode *, struct shrlock *);
extern void cleanshares(struct vnode *, pid_t);
extern int shr_has_remote_shares(vnode_t *, int32_t);
extern int proc_has_nbmand_share_on_vp(vnode_t *, pid_t);
extern int share_blocks_lock(vnode_t *, struct flock64 *);
extern int wait_for_share(vnode_t *, struct flock64 *);
#endif /* _KERNEL */

#ifdef  __cplusplus
}
#endif

#endif /* _SYS_SHARE_H */