xref: /titanic_50/usr/src/uts/common/sys/share.h (revision 888e055994b8b0dc77b98c53dd97026237caec5d)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef _SYS_SHARE_H
27 #define	_SYS_SHARE_H
28 
29 #include <sys/types.h>
30 
31 #ifdef	__cplusplus
32 extern "C" {
33 #endif
34 
35 /*
36  * Maximum size of a shrlock owner.
37  * Must be large enough to handle a netobj.
38  */
39 #define	MAX_SHR_OWNER_LEN	1024
40 
41 /*
42  * Contents of shrlock owner field for local share requests
43  */
44 struct shr_locowner {
45 	pid_t	sl_pid;
46 	int	sl_id;
47 };
48 
49 struct shrlock {
50 	short	s_access;
51 	short	s_deny;
52 	int32_t	s_sysid;	/* 0 if local otherwise passed by lm */
53 	pid_t	s_pid;		/* 0 if remote otherwise local pid */
54 	int	s_own_len;	/* if 0 and F_UNSHARE matching sysid */
55 	caddr_t	s_owner;	/* variable length opaque owner */
56 };
57 
58 struct shrlocklist {
59 	struct shrlock *shr;
60 	struct shrlocklist *next;
61 };
62 
63 #if defined(_KERNEL)
64 struct flock64;
65 
66 extern int add_share(struct vnode *, struct shrlock *);
67 extern int del_share(struct vnode *, struct shrlock *);
68 extern void cleanshares(struct vnode *, pid_t);
69 extern int shr_has_remote_shares(vnode_t *, int32_t);
70 extern int proc_has_nbmand_share_on_vp(vnode_t *, pid_t);
71 #endif /* _KERNEL */
72 
73 #ifdef	__cplusplus
74 }
75 #endif
76 
77 #endif /* _SYS_SHARE_H */
78