1 /*-
2 * Copyright (c) 2006-2007 Ivan Voras <ivoras@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: releng/8.2/sys/geom/virstor/g_virstor.h 172302 2007-09-23 07:34:23Z pjd $
27 */
28
29 #ifndef _G_VIRSTOR_H_
30 #define _G_VIRSTOR_H_
31
32 #define G_VIRSTOR_CLASS_NAME "VIRSTOR"
33
34
35 #define VIRSTOR_MAP_ALLOCATED 1
36 struct virstor_map_entry {
37 uint16_t flags;
38 uint16_t provider_no;
39 uint32_t provider_chunk;
40 };
41
42 #define VIRSTOR_MAP_ENTRY_SIZE (sizeof(struct virstor_map_entry))
43 #define VIRSTOR_MAP_BLOCK_ENTRIES (MAXPHYS / VIRSTOR_MAP_ENTRY_SIZE)
44 /* Struct size is guarded by CTASSERT in main source */
45
46 #ifdef _KERNEL
47
48 #define LOG_MSG(lvl, ...) do { \
49 if (g_virstor_debug >= (lvl)) { \
50 printf("GEOM_" G_VIRSTOR_CLASS_NAME); \
51 if (lvl > 0) \
52 printf("[%u]", lvl); \
53 printf(": "); \
54 printf(__VA_ARGS__); \
55 printf("\n"); \
56 } \
57 } while (0)
58 #define LOG_MESSAGE LOG_MSG
59
60 #define LOG_REQ(lvl, bp, ...) do { \
61 if (g_virstor_debug >= (lvl)) { \
62 printf("GEOM_" G_VIRSTOR_CLASS_NAME); \
63 if (lvl > 0) \
64 printf("[%u]", lvl); \
65 printf(": "); \
66 printf(__VA_ARGS__); \
67 printf(" "); \
68 g_print_bio(bp); \
69 printf("\n"); \
70 } \
71 } while (0)
72 #define LOG_REQUEST LOG_REQ
73
74 /* "critical" system announcements (e.g. "geom is up") */
75 #define LVL_ANNOUNCE 0
76 /* errors */
77 #define LVL_ERROR 1
78 /* warnings */
79 #define LVL_WARNING 2
80 /* info, noncritical for system operation (user doesn't have to see it */
81 #define LVL_INFO 5
82 /* debug info */
83 #define LVL_DEBUG 10
84 /* more debug info */
85 #define LVL_DEBUG2 12
86 /* superfluous debug info (large volumes of data) */
87 #define LVL_MOREDEBUG 15
88
89
90 /* Component data */
91 struct g_virstor_component {
92 struct g_consumer *gcons;
93 struct g_virstor_softc *sc;
94 unsigned int index; /* Component index in array */
95 unsigned int chunk_count;
96 unsigned int chunk_next;
97 unsigned int chunk_reserved;
98 unsigned int flags;
99 };
100
101
102 /* Internal geom instance data */
103 struct g_virstor_softc {
104 struct g_geom *geom;
105 struct g_provider *provider;
106 struct g_virstor_component *components;
107 u_int n_components;
108 u_int curr_component; /* Component currently used */
109 uint32_t id; /* Unique ID of this geom */
110 off_t virsize; /* Total size of virstor */
111 off_t sectorsize;
112 size_t chunk_size;
113 size_t chunk_count; /* governs map_size */
114 struct virstor_map_entry *map;
115 size_t map_size; /* (in bytes) */
116 size_t map_sectors; /* Size of map in sectors */
117 size_t me_per_sector; /* # map entries in a sector */
118 STAILQ_HEAD(, g_virstor_bio_q) delayed_bio_q; /* Queue of delayed BIOs */
119 struct mtx delayed_bio_q_mtx;
120 };
121
122 /* "delayed BIOs" Queue element */
123 struct g_virstor_bio_q {
124 struct bio *bio;
125 STAILQ_ENTRY(g_virstor_bio_q) linkage;
126 };
127
128
129 #endif /* _KERNEL */
130
131 #ifndef _PATH_DEV
132 #define _PATH_DEV "/dev/"
133 #endif
134
135 #endif /* !_G_VIRSTOR_H_ */
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