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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2012, 2014 by Delphix. All rights reserved. 24 */ 25 26 #ifndef _SYS_DSL_SYNCTASK_H 27 #define _SYS_DSL_SYNCTASK_H 28 29 #include <sys/txg.h> 30 #include <sys/zfs_context.h> 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 struct dsl_pool; 37 38 typedef int (dsl_checkfunc_t)(void *, dmu_tx_t *); 39 typedef void (dsl_syncfunc_t)(void *, dmu_tx_t *); 40 41 typedef enum zfs_space_check { 42 /* 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. 47 */ 48 ZFS_SPACE_CHECK_NORMAL, 49 50 /* 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. 56 */ 57 ZFS_SPACE_CHECK_RESERVED, 58 59 /* 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). 64 * 65 * See also the comments above spa_slop_shift. 66 */ 67 ZFS_SPACE_CHECK_NONE, 68 } zfs_space_check_t; 69 70 typedef struct dsl_sync_task { 71 txg_node_t dst_node; 72 struct dsl_pool *dst_pool; 73 uint64_t dst_txg; 74 int dst_space; 75 zfs_space_check_t dst_space_check; 76 dsl_checkfunc_t *dst_checkfunc; 77 dsl_syncfunc_t *dst_syncfunc; 78 void *dst_arg; 79 int dst_error; 80 boolean_t dst_nowaiter; 81 } dsl_sync_task_t; 82 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 *); 88 89 #ifdef __cplusplus 90 } 91 #endif 92 93 #endif /* _SYS_DSL_SYNCTASK_H */ 94