Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/sys/arc.h @ 14039:6cfd5a5778b9
3137 L2ARC compression
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@nexenta.com>
| author | Saso Kiselkov <skiselkov@gmail.com> |
|---|---|
| date | Wed, 05 Jun 2013 11:57:05 -0400 |
| parents | 4972ab336f54 |
| children | cb4a51285eeb |
| rev | line source |
|---|---|
| 789 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
| 1544 | 5 * Common Development and Distribution License (the "License"). |
| 6 * You may not use this file except in compliance with the License. | |
| 789 | 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 /* | |
|
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22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
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23 * Copyright (c) 2012 by Delphix. All rights reserved. |
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24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. |
| 789 | 25 */ |
| 26 | |
| 27 #ifndef _SYS_ARC_H | |
| 28 #define _SYS_ARC_H | |
| 29 | |
| 30 #include <sys/zfs_context.h> | |
| 31 | |
| 32 #ifdef __cplusplus | |
| 33 extern "C" { | |
| 34 #endif | |
| 35 | |
| 36 #include <sys/zio.h> | |
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37 #include <sys/dmu.h> |
| 5450 | 38 #include <sys/spa.h> |
| 789 | 39 |
| 40 typedef struct arc_buf_hdr arc_buf_hdr_t; | |
| 41 typedef struct arc_buf arc_buf_t; | |
| 42 typedef void arc_done_func_t(zio_t *zio, arc_buf_t *buf, void *private); | |
| 1544 | 43 typedef int arc_evict_func_t(void *private); |
| 789 | 44 |
| 45 /* generic arc_done_func_t's which you can use */ | |
| 46 arc_done_func_t arc_bcopy_func; | |
| 47 arc_done_func_t arc_getbuf_func; | |
| 48 | |
| 49 struct arc_buf { | |
| 50 arc_buf_hdr_t *b_hdr; | |
| 51 arc_buf_t *b_next; | |
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52 kmutex_t b_evict_lock; |
| 789 | 53 void *b_data; |
| 1544 | 54 arc_evict_func_t *b_efunc; |
| 55 void *b_private; | |
| 789 | 56 }; |
| 57 | |
| 3290 | 58 typedef enum arc_buf_contents { |
| 59 ARC_BUFC_DATA, /* buffer contains data */ | |
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60 ARC_BUFC_METADATA, /* buffer contains metadata */ |
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61 ARC_BUFC_NUMTYPES |
| 3290 | 62 } arc_buf_contents_t; |
| 789 | 63 /* |
| 64 * These are the flags we pass into calls to the arc | |
| 65 */ | |
| 66 #define ARC_WAIT (1 << 1) /* perform I/O synchronously */ | |
| 67 #define ARC_NOWAIT (1 << 2) /* perform I/O asynchronously */ | |
| 68 #define ARC_PREFETCH (1 << 3) /* I/O is a prefetch */ | |
| 2391 | 69 #define ARC_CACHED (1 << 4) /* I/O was already in cache */ |
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70 #define ARC_L2CACHE (1 << 5) /* cache in L2ARC */ |
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71 #define ARC_L2COMPRESS (1 << 6) /* compress in L2ARC */ |
| 789 | 72 |
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73 /* |
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74 * The following breakdows of arc_size exist for kstat only. |
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75 */ |
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76 typedef enum arc_space_type { |
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77 ARC_SPACE_DATA, |
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78 ARC_SPACE_HDRS, |
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79 ARC_SPACE_L2HDRS, |
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80 ARC_SPACE_OTHER, |
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81 ARC_SPACE_NUMTYPES |
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82 } arc_space_type_t; |
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83 |
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84 void arc_space_consume(uint64_t space, arc_space_type_t type); |
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85 void arc_space_return(uint64_t space, arc_space_type_t type); |
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86 void *arc_data_buf_alloc(uint64_t space); |
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87 void arc_data_buf_free(void *buf, uint64_t space); |
| 3290 | 88 arc_buf_t *arc_buf_alloc(spa_t *spa, int size, void *tag, |
| 89 arc_buf_contents_t type); | |
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90 arc_buf_t *arc_loan_buf(spa_t *spa, int size); |
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91 void arc_return_buf(arc_buf_t *buf, void *tag); |
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92 void arc_loan_inuse_buf(arc_buf_t *buf, void *tag); |
| 1544 | 93 void arc_buf_add_ref(arc_buf_t *buf, void *tag); |
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94 boolean_t arc_buf_remove_ref(arc_buf_t *buf, void *tag); |
| 789 | 95 int arc_buf_size(arc_buf_t *buf); |
| 96 void arc_release(arc_buf_t *buf, void *tag); | |
| 97 int arc_released(arc_buf_t *buf); | |
| 1544 | 98 int arc_has_callback(arc_buf_t *buf); |
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99 void arc_buf_freeze(arc_buf_t *buf); |
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100 void arc_buf_thaw(arc_buf_t *buf); |
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101 boolean_t arc_buf_eviction_needed(arc_buf_t *buf); |
| 1544 | 102 #ifdef ZFS_DEBUG |
| 103 int arc_referenced(arc_buf_t *buf); | |
| 104 #endif | |
| 789 | 105 |
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106 int arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, |
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107 arc_done_func_t *done, void *private, int priority, int flags, |
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108 uint32_t *arc_flags, const zbookmark_t *zb); |
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109 zio_t *arc_write(zio_t *pio, spa_t *spa, uint64_t txg, |
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110 blkptr_t *bp, arc_buf_t *buf, boolean_t l2arc, boolean_t l2arc_compress, |
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111 const zio_prop_t *zp, arc_done_func_t *ready, arc_done_func_t *done, |
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112 void *private, int priority, int zio_flags, const zbookmark_t *zb); |
| 789 | 113 |
| 1544 | 114 void arc_set_callback(arc_buf_t *buf, arc_evict_func_t *func, void *private); |
| 115 int arc_buf_evict(arc_buf_t *buf); | |
| 116 | |
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117 void arc_flush(spa_t *spa); |
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118 void arc_tempreserve_clear(uint64_t reserve); |
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119 int arc_tempreserve_space(uint64_t reserve, uint64_t txg); |
| 789 | 120 |
| 121 void arc_init(void); | |
| 122 void arc_fini(void); | |
| 123 | |
| 5450 | 124 /* |
| 125 * Level 2 ARC | |
| 126 */ | |
| 127 | |
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128 void l2arc_add_vdev(spa_t *spa, vdev_t *vd); |
| 5450 | 129 void l2arc_remove_vdev(vdev_t *vd); |
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130 boolean_t l2arc_vdev_present(vdev_t *vd); |
| 5450 | 131 void l2arc_init(void); |
| 132 void l2arc_fini(void); | |
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133 void l2arc_start(void); |
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134 void l2arc_stop(void); |
| 5450 | 135 |
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136 #ifndef _KERNEL |
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137 extern boolean_t arc_watch; |
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138 extern int arc_procfd; |
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139 #endif |
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140 |
| 789 | 141 #ifdef __cplusplus |
| 142 } | |
| 143 #endif | |
| 144 | |
| 145 #endif /* _SYS_ARC_H */ |