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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
26 #ifndef _SYS_DSL_SYNCTASK_H
27 #define _SYS_DSL_SYNCTASK_H
30 #include <sys/zfs_context.h>
38 typedef int (dsl_checkfunc_t
)(void *, dmu_tx_t
*);
39 typedef void (dsl_syncfunc_t
)(void *, dmu_tx_t
*);
41 typedef enum zfs_space_check
{
43 * Normal space check: if there is less than 3.2% free space,
44 * the operation will fail. Operations which are logically
45 * creating things should use this (e.g. "zfs create", "zfs snapshot").
46 * User writes (via the ZPL / ZVOL) also fail at this point.
48 ZFS_SPACE_CHECK_NORMAL
,
51 * Space check allows use of half the slop space. If there
52 * is less than 1.6% free space, the operation will fail. Most
53 * operations should use this (e.g. "zfs set", "zfs rename"),
54 * because we want them to succeed even after user writes are failing,
55 * so that they can be used as part of the space recovery process.
57 ZFS_SPACE_CHECK_RESERVED
,
60 * No space check is performed. Only operations which we expect to
61 * result in a net reduction in space should use this
62 * (e.g. "zfs destroy". Setting quotas & reservations also uses
63 * this because it needs to circumvent the quota/reservation checks).
65 * See also the comments above spa_slop_shift.
70 typedef struct dsl_sync_task
{
72 struct dsl_pool
*dst_pool
;
75 zfs_space_check_t dst_space_check
;
76 dsl_checkfunc_t
*dst_checkfunc
;
77 dsl_syncfunc_t
*dst_syncfunc
;
80 boolean_t dst_nowaiter
;
83 void dsl_sync_task_sync(dsl_sync_task_t
*, dmu_tx_t
*);
84 int dsl_sync_task(const char *, dsl_checkfunc_t
*,
85 dsl_syncfunc_t
*, void *, int, zfs_space_check_t
);
86 void dsl_sync_task_nowait(struct dsl_pool
*, dsl_syncfunc_t
*,
87 void *, int, zfs_space_check_t
, dmu_tx_t
*);
93 #endif /* _SYS_DSL_SYNCTASK_H */