f854db0bf5
providers with limited physical storage and add physical storage as needed. Submitted by: Ivan Voras Sponsored by: Google Summer of Code 2006 Approved by: re (kensmith)
136 lines
4.2 KiB
C
136 lines
4.2 KiB
C
/*-
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* Copyright (c) 2006-2007 Ivan Voras <ivoras@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _G_VIRSTOR_H_
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#define _G_VIRSTOR_H_
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#define G_VIRSTOR_CLASS_NAME "VIRSTOR"
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#define VIRSTOR_MAP_ALLOCATED 1
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struct virstor_map_entry {
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uint16_t flags;
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uint16_t provider_no;
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uint32_t provider_chunk;
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};
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#define VIRSTOR_MAP_ENTRY_SIZE (sizeof(struct virstor_map_entry))
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#define VIRSTOR_MAP_BLOCK_ENTRIES (MAXPHYS / VIRSTOR_MAP_ENTRY_SIZE)
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/* Struct size is guarded by CTASSERT in main source */
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#ifdef _KERNEL
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#define LOG_MSG(lvl, ...) do { \
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if (g_virstor_debug >= (lvl)) { \
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printf("GEOM_" G_VIRSTOR_CLASS_NAME); \
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if (lvl > 0) \
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printf("[%u]", lvl); \
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printf(": "); \
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printf(__VA_ARGS__); \
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printf("\n"); \
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} \
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} while (0)
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#define LOG_MESSAGE LOG_MSG
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#define LOG_REQ(lvl, bp, ...) do { \
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if (g_virstor_debug >= (lvl)) { \
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printf("GEOM_" G_VIRSTOR_CLASS_NAME); \
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if (lvl > 0) \
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printf("[%u]", lvl); \
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printf(": "); \
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printf(__VA_ARGS__); \
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printf(" "); \
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g_print_bio(bp); \
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printf("\n"); \
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} \
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} while (0)
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#define LOG_REQUEST LOG_REQ
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/* "critical" system announcements (e.g. "geom is up") */
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#define LVL_ANNOUNCE 0
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/* errors */
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#define LVL_ERROR 1
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/* warnings */
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#define LVL_WARNING 2
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/* info, noncritical for system operation (user doesn't have to see it */
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#define LVL_INFO 5
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/* debug info */
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#define LVL_DEBUG 10
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/* more debug info */
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#define LVL_DEBUG2 12
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/* superfluous debug info (large volumes of data) */
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#define LVL_MOREDEBUG 15
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/* Component data */
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struct g_virstor_component {
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struct g_consumer *gcons;
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struct g_virstor_softc *sc;
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unsigned int index; /* Component index in array */
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unsigned int chunk_count;
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unsigned int chunk_next;
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unsigned int chunk_reserved;
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unsigned int flags;
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};
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/* Internal geom instance data */
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struct g_virstor_softc {
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struct g_geom *geom;
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struct g_provider *provider;
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struct g_virstor_component *components;
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u_int n_components;
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u_int curr_component; /* Component currently used */
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uint32_t id; /* Unique ID of this geom */
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off_t virsize; /* Total size of virstor */
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off_t sectorsize;
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size_t chunk_size;
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size_t chunk_count; /* governs map_size */
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struct virstor_map_entry *map;
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size_t map_size; /* (in bytes) */
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size_t map_sectors; /* Size of map in sectors */
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size_t me_per_sector; /* # map entries in a sector */
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STAILQ_HEAD(, g_virstor_bio_q) delayed_bio_q; /* Queue of delayed BIOs */
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struct mtx delayed_bio_q_mtx;
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};
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/* "delayed BIOs" Queue element */
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struct g_virstor_bio_q {
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struct bio *bio;
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STAILQ_ENTRY(g_virstor_bio_q) linkage;
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};
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#endif /* _KERNEL */
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#ifndef _PATH_DEV
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#define _PATH_DEV "/dev/"
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#endif
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#endif /* !_G_VIRSTOR_H_ */
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