diff options
Diffstat (limited to 'sys/geom/virstor/g_virstor.h')
| -rw-r--r-- | sys/geom/virstor/g_virstor.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/sys/geom/virstor/g_virstor.h b/sys/geom/virstor/g_virstor.h new file mode 100644 index 0000000..062ca94 --- /dev/null +++ b/sys/geom/virstor/g_virstor.h @@ -0,0 +1,135 @@ +/*- + * Copyright (c) 2006-2007 Ivan Voras <ivoras@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _G_VIRSTOR_H_ +#define _G_VIRSTOR_H_ + +#define G_VIRSTOR_CLASS_NAME "VIRSTOR" + + +#define VIRSTOR_MAP_ALLOCATED 1 +struct virstor_map_entry { + uint16_t flags; + uint16_t provider_no; + uint32_t provider_chunk; +}; + +#define VIRSTOR_MAP_ENTRY_SIZE (sizeof(struct virstor_map_entry)) +#define VIRSTOR_MAP_BLOCK_ENTRIES (MAXPHYS / VIRSTOR_MAP_ENTRY_SIZE) +/* Struct size is guarded by CTASSERT in main source */ + +#ifdef _KERNEL + +#define LOG_MSG(lvl, ...) do { \ + if (g_virstor_debug >= (lvl)) { \ + printf("GEOM_" G_VIRSTOR_CLASS_NAME); \ + if (lvl > 0) \ + printf("[%u]", lvl); \ + printf(": "); \ + printf(__VA_ARGS__); \ + printf("\n"); \ + } \ +} while (0) +#define LOG_MESSAGE LOG_MSG + +#define LOG_REQ(lvl, bp, ...) do { \ + if (g_virstor_debug >= (lvl)) { \ + printf("GEOM_" G_VIRSTOR_CLASS_NAME); \ + if (lvl > 0) \ + printf("[%u]", lvl); \ + printf(": "); \ + printf(__VA_ARGS__); \ + printf(" "); \ + g_print_bio(bp); \ + printf("\n"); \ + } \ +} while (0) +#define LOG_REQUEST LOG_REQ + +/* "critical" system announcements (e.g. "geom is up") */ +#define LVL_ANNOUNCE 0 +/* errors */ +#define LVL_ERROR 1 +/* warnings */ +#define LVL_WARNING 2 +/* info, noncritical for system operation (user doesn't have to see it */ +#define LVL_INFO 5 +/* debug info */ +#define LVL_DEBUG 10 +/* more debug info */ +#define LVL_DEBUG2 12 +/* superfluous debug info (large volumes of data) */ +#define LVL_MOREDEBUG 15 + + +/* Component data */ +struct g_virstor_component { + struct g_consumer *gcons; + struct g_virstor_softc *sc; + unsigned int index; /* Component index in array */ + unsigned int chunk_count; + unsigned int chunk_next; + unsigned int chunk_reserved; + unsigned int flags; +}; + + +/* Internal geom instance data */ +struct g_virstor_softc { + struct g_geom *geom; + struct g_provider *provider; + struct g_virstor_component *components; + u_int n_components; + u_int curr_component; /* Component currently used */ + uint32_t id; /* Unique ID of this geom */ + off_t virsize; /* Total size of virstor */ + off_t sectorsize; + size_t chunk_size; + size_t chunk_count; /* governs map_size */ + struct virstor_map_entry *map; + size_t map_size; /* (in bytes) */ + size_t map_sectors; /* Size of map in sectors */ + size_t me_per_sector; /* # map entries in a sector */ + STAILQ_HEAD(, g_virstor_bio_q) delayed_bio_q; /* Queue of delayed BIOs */ + struct mtx delayed_bio_q_mtx; +}; + +/* "delayed BIOs" Queue element */ +struct g_virstor_bio_q { + struct bio *bio; + STAILQ_ENTRY(g_virstor_bio_q) linkage; +}; + + +#endif /* _KERNEL */ + +#ifndef _PATH_DEV +#define _PATH_DEV "/dev/" +#endif + +#endif /* !_G_VIRSTOR_H_ */ |
