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3525 Persistent L2ARC
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--- old/usr/src/uts/common/fs/zfs/sys/arc.h
+++ new/usr/src/uts/common/fs/zfs/sys/arc.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 23 * Copyright (c) 2013 by Delphix. All rights reserved.
24 24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
25 25 */
26 26
27 27 #ifndef _SYS_ARC_H
28 28 #define _SYS_ARC_H
29 29
30 30 #include <sys/zfs_context.h>
31 31
32 32 #ifdef __cplusplus
33 33 extern "C" {
34 34 #endif
35 35
36 36 #include <sys/zio.h>
37 37 #include <sys/dmu.h>
38 38 #include <sys/spa.h>
39 39
40 40 typedef struct arc_buf_hdr arc_buf_hdr_t;
41 41 typedef struct arc_buf arc_buf_t;
42 42 typedef void arc_done_func_t(zio_t *zio, arc_buf_t *buf, void *private);
43 43 typedef int arc_evict_func_t(void *private);
44 44
45 45 /* generic arc_done_func_t's which you can use */
46 46 arc_done_func_t arc_bcopy_func;
47 47 arc_done_func_t arc_getbuf_func;
48 48
49 49 struct arc_buf {
50 50 arc_buf_hdr_t *b_hdr;
51 51 arc_buf_t *b_next;
52 52 kmutex_t b_evict_lock;
53 53 void *b_data;
54 54 arc_evict_func_t *b_efunc;
55 55 void *b_private;
56 56 };
57 57
58 58 typedef enum arc_buf_contents {
59 59 ARC_BUFC_DATA, /* buffer contains data */
60 60 ARC_BUFC_METADATA, /* buffer contains metadata */
61 61 ARC_BUFC_NUMTYPES
62 62 } arc_buf_contents_t;
63 63 /*
64 64 * These are the flags we pass into calls to the arc
65 65 */
66 66 #define ARC_WAIT (1 << 1) /* perform I/O synchronously */
67 67 #define ARC_NOWAIT (1 << 2) /* perform I/O asynchronously */
68 68 #define ARC_PREFETCH (1 << 3) /* I/O is a prefetch */
69 69 #define ARC_CACHED (1 << 4) /* I/O was already in cache */
70 70 #define ARC_L2CACHE (1 << 5) /* cache in L2ARC */
71 71 #define ARC_L2COMPRESS (1 << 6) /* compress in L2ARC */
72 72
73 73 /*
74 74 * The following breakdows of arc_size exist for kstat only.
75 75 */
76 76 typedef enum arc_space_type {
77 77 ARC_SPACE_DATA,
78 78 ARC_SPACE_HDRS,
79 79 ARC_SPACE_L2HDRS,
80 80 ARC_SPACE_OTHER,
81 81 ARC_SPACE_NUMTYPES
82 82 } arc_space_type_t;
83 83
84 84 void arc_space_consume(uint64_t space, arc_space_type_t type);
85 85 void arc_space_return(uint64_t space, arc_space_type_t type);
86 86 void *arc_data_buf_alloc(uint64_t space);
87 87 void arc_data_buf_free(void *buf, uint64_t space);
88 88 arc_buf_t *arc_buf_alloc(spa_t *spa, int size, void *tag,
89 89 arc_buf_contents_t type);
90 90 arc_buf_t *arc_loan_buf(spa_t *spa, int size);
91 91 void arc_return_buf(arc_buf_t *buf, void *tag);
92 92 void arc_loan_inuse_buf(arc_buf_t *buf, void *tag);
93 93 void arc_buf_add_ref(arc_buf_t *buf, void *tag);
94 94 boolean_t arc_buf_remove_ref(arc_buf_t *buf, void *tag);
95 95 int arc_buf_size(arc_buf_t *buf);
96 96 void arc_release(arc_buf_t *buf, void *tag);
97 97 int arc_released(arc_buf_t *buf);
98 98 int arc_has_callback(arc_buf_t *buf);
99 99 void arc_buf_freeze(arc_buf_t *buf);
100 100 void arc_buf_thaw(arc_buf_t *buf);
101 101 boolean_t arc_buf_eviction_needed(arc_buf_t *buf);
102 102 #ifdef ZFS_DEBUG
103 103 int arc_referenced(arc_buf_t *buf);
104 104 #endif
105 105
106 106 int arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
107 107 arc_done_func_t *done, void *private, zio_priority_t priority, int flags,
108 108 uint32_t *arc_flags, const zbookmark_t *zb);
109 109 zio_t *arc_write(zio_t *pio, spa_t *spa, uint64_t txg,
110 110 blkptr_t *bp, arc_buf_t *buf, boolean_t l2arc, boolean_t l2arc_compress,
111 111 const zio_prop_t *zp, arc_done_func_t *ready, arc_done_func_t *physdone,
112 112 arc_done_func_t *done, void *private, zio_priority_t priority,
113 113 int zio_flags, const zbookmark_t *zb);
114 114 void arc_freed(spa_t *spa, const blkptr_t *bp);
115 115
116 116 void arc_set_callback(arc_buf_t *buf, arc_evict_func_t *func, void *private);
117 117 int arc_buf_evict(arc_buf_t *buf);
118 118
119 119 void arc_flush(spa_t *spa);
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120 120 void arc_tempreserve_clear(uint64_t reserve);
121 121 int arc_tempreserve_space(uint64_t reserve, uint64_t txg);
122 122
123 123 void arc_init(void);
124 124 void arc_fini(void);
125 125
126 126 /*
127 127 * Level 2 ARC
128 128 */
129 129
130 -void l2arc_add_vdev(spa_t *spa, vdev_t *vd);
130 +void l2arc_add_vdev(spa_t *spa, vdev_t *vd, boolean_t rebuild);
131 131 void l2arc_remove_vdev(vdev_t *vd);
132 132 boolean_t l2arc_vdev_present(vdev_t *vd);
133 133 void l2arc_init(void);
134 134 void l2arc_fini(void);
135 135 void l2arc_start(void);
136 136 void l2arc_stop(void);
137 +void l2arc_spa_rebuild_start(spa_t *spa);
137 138
138 139 #ifndef _KERNEL
139 140 extern boolean_t arc_watch;
140 141 extern int arc_procfd;
141 142 #endif
142 143
143 144 #ifdef __cplusplus
144 145 }
145 146 #endif
146 147
147 148 #endif /* _SYS_ARC_H */
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