xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/zfs_onexit.h (revision 20a7641f9918de8574b8b3b47dbe35c4bfc78df1)
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 /*
23  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
24  */
25 
26 #ifndef	_SYS_ZFS_ONEXIT_H
27 #define	_SYS_ZFS_ONEXIT_H
28 
29 #include <sys/zfs_context.h>
30 
31 #ifdef	__cplusplus
32 extern "C" {
33 #endif
34 
35 #ifdef _KERNEL
36 
37 typedef struct zfs_onexit {
38 	kmutex_t	zo_lock;
39 	list_t		zo_actions;
40 } zfs_onexit_t;
41 
42 typedef struct zfs_onexit_action_node {
43 	list_node_t	za_link;
44 	void		(*za_func)(void *);
45 	void		*za_data;
46 } zfs_onexit_action_node_t;
47 
48 extern void zfs_onexit_init(zfs_onexit_t **zo);
49 extern void zfs_onexit_destroy(zfs_onexit_t *zo);
50 
51 #endif
52 
53 extern int zfs_onexit_fd_hold(int fd, minor_t *minorp);
54 extern void zfs_onexit_fd_rele(int fd);
55 extern int zfs_onexit_add_cb(minor_t minor, void (*func)(void *), void *data,
56     uint64_t *action_handle);
57 extern int zfs_onexit_del_cb(minor_t minor, uint64_t action_handle,
58     boolean_t fire);
59 extern int zfs_onexit_cb_data(minor_t minor, uint64_t action_handle,
60     void **data);
61 
62 #ifdef	__cplusplus
63 }
64 #endif
65 
66 #endif	/* _SYS_ZFS_ONEXIT_H */
67