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      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