Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/sys/arc.h @ 7545:d8ac8023a8e3
6737207 assertion failed: race between arc_release() and arc_referenced()
6732083 arc_read() panic: rw_exit: lock not held
| author | Mark Maybee <Mark.Maybee@Sun.COM> |
|---|---|
| date | Wed, 10 Sep 2008 14:10:00 -0600 |
| parents | f47d41541b14 |
| children | b80e4842ad54 |
| 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 2008 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 void arc_space_consume(uint64_t space); |
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72 void arc_space_return(uint64_t space); |
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73 void *arc_data_buf_alloc(uint64_t space); |
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74 void arc_data_buf_free(void *buf, uint64_t space); |
| 3290 | 75 arc_buf_t *arc_buf_alloc(spa_t *spa, int size, void *tag, |
| 76 arc_buf_contents_t type); | |
| 1544 | 77 void arc_buf_add_ref(arc_buf_t *buf, void *tag); |
| 78 int arc_buf_remove_ref(arc_buf_t *buf, void *tag); | |
| 789 | 79 int arc_buf_size(arc_buf_t *buf); |
| 80 void arc_release(arc_buf_t *buf, void *tag); | |
| 81 int arc_released(arc_buf_t *buf); | |
| 1544 | 82 int arc_has_callback(arc_buf_t *buf); |
|
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83 void arc_buf_freeze(arc_buf_t *buf); |
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84 void arc_buf_thaw(arc_buf_t *buf); |
| 1544 | 85 #ifdef ZFS_DEBUG |
| 86 int arc_referenced(arc_buf_t *buf); | |
| 87 #endif | |
| 789 | 88 |
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89 typedef struct writeprops { |
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90 dmu_object_type_t wp_type; |
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91 uint8_t wp_copies; |
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92 uint8_t wp_level; |
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93 uint8_t wp_dncompress, wp_oscompress; |
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94 uint8_t wp_dnchecksum, wp_oschecksum; |
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95 } writeprops_t; |
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96 |
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97 int arc_read(zio_t *pio, spa_t *spa, blkptr_t *bp, arc_buf_t *pbuf, |
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98 arc_done_func_t *done, void *private, int priority, int zio_flags, |
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99 uint32_t *arc_flags, const zbookmark_t *zb); |
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100 int arc_read_nolock(zio_t *pio, spa_t *spa, blkptr_t *bp, |
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101 arc_done_func_t *done, void *private, int priority, int flags, |
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102 uint32_t *arc_flags, const zbookmark_t *zb); |
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103 zio_t *arc_write(zio_t *pio, spa_t *spa, const writeprops_t *wp, |
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104 boolean_t l2arc, uint64_t txg, blkptr_t *bp, arc_buf_t *buf, |
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105 arc_done_func_t *ready, arc_done_func_t *done, void *private, int priority, |
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106 int zio_flags, const zbookmark_t *zb); |
| 789 | 107 int arc_free(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, |
| 108 zio_done_func_t *done, void *private, uint32_t arc_flags); | |
| 109 int arc_tryread(spa_t *spa, blkptr_t *bp, void *data); | |
| 110 | |
| 1544 | 111 void arc_set_callback(arc_buf_t *buf, arc_evict_func_t *func, void *private); |
| 112 int arc_buf_evict(arc_buf_t *buf); | |
| 113 | |
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114 void arc_flush(spa_t *spa); |
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115 void arc_tempreserve_clear(uint64_t reserve); |
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116 int arc_tempreserve_space(uint64_t reserve, uint64_t txg); |
| 789 | 117 |
| 118 void arc_init(void); | |
| 119 void arc_fini(void); | |
| 120 | |
| 5450 | 121 /* |
| 122 * Level 2 ARC | |
| 123 */ | |
| 124 | |
| 125 void l2arc_add_vdev(spa_t *spa, vdev_t *vd, uint64_t start, uint64_t end); | |
| 126 void l2arc_remove_vdev(vdev_t *vd); | |
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127 boolean_t l2arc_vdev_present(vdev_t *vd); |
| 5450 | 128 void l2arc_init(void); |
| 129 void l2arc_fini(void); | |
| 130 | |
| 789 | 131 #ifdef __cplusplus |
| 132 } | |
| 133 #endif | |
| 134 | |
| 135 #endif /* _SYS_ARC_H */ |