projects / mirror_ubuntu-artful-kernel.git / blame
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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 | * 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 */ |