Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/sys/arc.h @ 11539:10d35fc3d7fd
6873106 Need a mechanism to share buffers between fs modules
author | chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM> |
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date | Mon, 18 Jan 2010 10:34:16 -0800 |
parents | e2081f502306 |
children | 7cf402a7f374 |
rev | line source |
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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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6873106 Need a mechanism to share buffers between fs modules
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22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. |
789 | 23 * Use is subject to license terms. |
24 */ | |
25 | |
26 #ifndef _SYS_ARC_H | |
27 #define _SYS_ARC_H | |
28 | |
29 #include <sys/zfs_context.h> | |
30 | |
31 #ifdef __cplusplus | |
32 extern "C" { | |
33 #endif | |
34 | |
35 #include <sys/zio.h> | |
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36 #include <sys/dmu.h> |
5450 | 37 #include <sys/spa.h> |
789 | 38 |
39 typedef struct arc_buf_hdr arc_buf_hdr_t; | |
40 typedef struct arc_buf arc_buf_t; | |
41 typedef void arc_done_func_t(zio_t *zio, arc_buf_t *buf, void *private); | |
1544 | 42 typedef int arc_evict_func_t(void *private); |
789 | 43 |
44 /* generic arc_done_func_t's which you can use */ | |
45 arc_done_func_t arc_bcopy_func; | |
46 arc_done_func_t arc_getbuf_func; | |
47 | |
48 struct arc_buf { | |
49 arc_buf_hdr_t *b_hdr; | |
50 arc_buf_t *b_next; | |
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51 krwlock_t b_lock; |
789 | 52 void *b_data; |
1544 | 53 arc_evict_func_t *b_efunc; |
54 void *b_private; | |
789 | 55 }; |
56 | |
3290 | 57 typedef enum arc_buf_contents { |
58 ARC_BUFC_DATA, /* buffer contains data */ | |
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59 ARC_BUFC_METADATA, /* buffer contains metadata */ |
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60 ARC_BUFC_NUMTYPES |
3290 | 61 } arc_buf_contents_t; |
789 | 62 /* |
63 * These are the flags we pass into calls to the arc | |
64 */ | |
65 #define ARC_WAIT (1 << 1) /* perform I/O synchronously */ | |
66 #define ARC_NOWAIT (1 << 2) /* perform I/O asynchronously */ | |
67 #define ARC_PREFETCH (1 << 3) /* I/O is a prefetch */ | |
2391 | 68 #define ARC_CACHED (1 << 4) /* I/O was already in cache */ |
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69 #define ARC_L2CACHE (1 << 5) /* cache in L2ARC */ |
789 | 70 |
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71 /* |
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72 * The following breakdows of arc_size exist for kstat only. |
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73 */ |
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74 typedef enum arc_space_type { |
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75 ARC_SPACE_DATA, |
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76 ARC_SPACE_HDRS, |
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77 ARC_SPACE_L2HDRS, |
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78 ARC_SPACE_OTHER, |
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79 ARC_SPACE_NUMTYPES |
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80 } arc_space_type_t; |
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81 |
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82 void arc_space_consume(uint64_t space, arc_space_type_t type); |
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83 void arc_space_return(uint64_t space, arc_space_type_t type); |
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84 void *arc_data_buf_alloc(uint64_t space); |
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85 void arc_data_buf_free(void *buf, uint64_t space); |
3290 | 86 arc_buf_t *arc_buf_alloc(spa_t *spa, int size, void *tag, |
87 arc_buf_contents_t type); | |
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88 arc_buf_t *arc_loan_buf(spa_t *spa, int size); |
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89 void arc_return_buf(arc_buf_t *buf, void *tag); |
11539
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6873106 Need a mechanism to share buffers between fs modules
chunli zhang - Sun Microsystems - Irvine United States <Chunli.Zhang@Sun.COM>
parents:
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90 void arc_loan_inuse_buf(arc_buf_t *buf, void *tag); |
1544 | 91 void arc_buf_add_ref(arc_buf_t *buf, void *tag); |
92 int arc_buf_remove_ref(arc_buf_t *buf, void *tag); | |
789 | 93 int arc_buf_size(arc_buf_t *buf); |
94 void arc_release(arc_buf_t *buf, void *tag); | |
95 int arc_released(arc_buf_t *buf); | |
1544 | 96 int arc_has_callback(arc_buf_t *buf); |
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97 void arc_buf_freeze(arc_buf_t *buf); |
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98 void arc_buf_thaw(arc_buf_t *buf); |
1544 | 99 #ifdef ZFS_DEBUG |
100 int arc_referenced(arc_buf_t *buf); | |
101 #endif | |
789 | 102 |
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103 int arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp, arc_buf_t *pbuf, |
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104 arc_done_func_t *done, void *private, int priority, int zio_flags, |
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105 uint32_t *arc_flags, const zbookmark_t *zb); |
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106 int arc_read_nolock(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, const zio_prop_t *zp, |
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111 arc_done_func_t *ready, arc_done_func_t *done, void *private, |
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112 int priority, int zio_flags, const zbookmark_t *zb); |
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113 void arc_free(spa_t *spa, const blkptr_t *bp); |
789 | 114 |
1544 | 115 void arc_set_callback(arc_buf_t *buf, arc_evict_func_t *func, void *private); |
116 int arc_buf_evict(arc_buf_t *buf); | |
117 | |
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118 void arc_flush(spa_t *spa); |
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119 void arc_tempreserve_clear(uint64_t reserve); |
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120 int arc_tempreserve_space(uint64_t reserve, uint64_t txg); |
789 | 121 |
122 void arc_init(void); | |
123 void arc_fini(void); | |
124 | |
5450 | 125 /* |
126 * Level 2 ARC | |
127 */ | |
128 | |
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129 void l2arc_add_vdev(spa_t *spa, vdev_t *vd); |
5450 | 130 void l2arc_remove_vdev(vdev_t *vd); |
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131 boolean_t l2arc_vdev_present(vdev_t *vd); |
5450 | 132 void l2arc_init(void); |
133 void l2arc_fini(void); | |
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134 void l2arc_start(void); |
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135 void l2arc_stop(void); |
5450 | 136 |
789 | 137 #ifdef __cplusplus |
138 } | |
139 #endif | |
140 | |
141 #endif /* _SYS_ARC_H */ |