2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2006-2007 Ivan Voras <ivoras@freebsd.org>
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8 * modification, are permitted provided that the following conditions
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16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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34 #define G_VIRSTOR_CLASS_NAME "VIRSTOR"
36 #define VIRSTOR_MAP_ALLOCATED 1
37 struct virstor_map_entry {
40 uint32_t provider_chunk;
43 #define VIRSTOR_MAP_ENTRY_SIZE (sizeof(struct virstor_map_entry))
44 #define VIRSTOR_MAP_BLOCK_ENTRIES (maxphys / VIRSTOR_MAP_ENTRY_SIZE)
45 /* Struct size is guarded by MPASS in main source */
49 #define LOG_MSG(lvl, ...) \
50 _GEOM_DEBUG("GEOM_VIRSTOR", g_virstor_debug, (lvl), NULL, __VA_ARGS__)
51 #define LOG_MESSAGE LOG_MSG
53 #define LOG_REQ(lvl, bp, ...) \
54 _GEOM_DEBUG("GEOM_VIRSTOR", g_virstor_debug, (lvl), (bp), __VA_ARGS__)
55 #define LOG_REQUEST LOG_REQ
57 /* "critical" system announcements (e.g. "geom is up") */
58 #define LVL_ANNOUNCE 0
63 /* info, noncritical for system operation (user doesn't have to see it */
69 /* superfluous debug info (large volumes of data) */
70 #define LVL_MOREDEBUG 15
73 struct g_virstor_component {
74 struct g_consumer *gcons;
75 struct g_virstor_softc *sc;
76 unsigned int index; /* Component index in array */
77 unsigned int chunk_count;
78 unsigned int chunk_next;
79 unsigned int chunk_reserved;
83 /* Internal geom instance data */
84 struct g_virstor_softc {
86 struct g_provider *provider;
87 struct g_virstor_component *components;
89 u_int curr_component; /* Component currently used */
90 uint32_t id; /* Unique ID of this geom */
91 off_t virsize; /* Total size of virstor */
94 size_t chunk_count; /* governs map_size */
95 struct virstor_map_entry *map;
96 size_t map_size; /* (in bytes) */
97 size_t map_sectors; /* Size of map in sectors */
98 size_t me_per_sector; /* # map entries in a sector */
99 STAILQ_HEAD(, g_virstor_bio_q) delayed_bio_q; /* Queue of delayed BIOs */
100 struct mtx delayed_bio_q_mtx;
103 /* "delayed BIOs" Queue element */
104 struct g_virstor_bio_q {
106 STAILQ_ENTRY(g_virstor_bio_q) linkage;
111 #endif /* !_G_VIRSTOR_H_ */