387 lines
12 KiB
C
387 lines
12 KiB
C
/*-
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* Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@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_RAID3_H_
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#define _G_RAID3_H_
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#include <sys/endian.h>
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#include <sys/md5.h>
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#define G_RAID3_CLASS_NAME "RAID3"
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#define G_RAID3_MAGIC "GEOM::RAID3"
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/*
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* Version history:
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* 0 - Initial version number.
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* 1 - Added 'round-robin reading' algorithm.
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* 2 - Added 'verify reading' algorithm.
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* 3 - Added md_genid field to metadata.
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*/
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#define G_RAID3_VERSION 3
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#define G_RAID3_DISK_FLAG_DIRTY 0x0000000000000001ULL
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#define G_RAID3_DISK_FLAG_SYNCHRONIZING 0x0000000000000002ULL
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#define G_RAID3_DISK_FLAG_FORCE_SYNC 0x0000000000000004ULL
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#define G_RAID3_DISK_FLAG_HARDCODED 0x0000000000000008ULL
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#define G_RAID3_DISK_FLAG_MASK (G_RAID3_DISK_FLAG_DIRTY | \
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G_RAID3_DISK_FLAG_SYNCHRONIZING | \
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G_RAID3_DISK_FLAG_FORCE_SYNC)
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#define G_RAID3_DEVICE_FLAG_NOAUTOSYNC 0x0000000000000001ULL
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#define G_RAID3_DEVICE_FLAG_ROUND_ROBIN 0x0000000000000002ULL
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#define G_RAID3_DEVICE_FLAG_VERIFY 0x0000000000000004ULL
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#define G_RAID3_DEVICE_FLAG_MASK (G_RAID3_DEVICE_FLAG_NOAUTOSYNC | \
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G_RAID3_DEVICE_FLAG_ROUND_ROBIN | \
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G_RAID3_DEVICE_FLAG_VERIFY)
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#ifdef _KERNEL
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extern u_int g_raid3_debug;
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#define G_RAID3_DEBUG(lvl, ...) do { \
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if (g_raid3_debug >= (lvl)) { \
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printf("GEOM_RAID3"); \
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if (g_raid3_debug > 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 G_RAID3_LOGREQ(lvl, bp, ...) do { \
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if (g_raid3_debug >= (lvl)) { \
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printf("GEOM_RAID3"); \
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if (g_raid3_debug > 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 G_RAID3_BIO_CFLAG_REGULAR 0x01
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#define G_RAID3_BIO_CFLAG_SYNC 0x02
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#define G_RAID3_BIO_CFLAG_PARITY 0x04
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#define G_RAID3_BIO_CFLAG_NODISK 0x08
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#define G_RAID3_BIO_CFLAG_REGSYNC 0x10
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#define G_RAID3_BIO_CFLAG_MASK (G_RAID3_BIO_CFLAG_REGULAR | \
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G_RAID3_BIO_CFLAG_SYNC | \
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G_RAID3_BIO_CFLAG_PARITY | \
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G_RAID3_BIO_CFLAG_NODISK | \
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G_RAID3_BIO_CFLAG_REGSYNC)
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#define G_RAID3_BIO_PFLAG_DEGRADED 0x01
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#define G_RAID3_BIO_PFLAG_NOPARITY 0x02
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#define G_RAID3_BIO_PFLAG_VERIFY 0x04
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#define G_RAID3_BIO_PFLAG_MASK (G_RAID3_BIO_PFLAG_DEGRADED | \
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G_RAID3_BIO_PFLAG_NOPARITY | \
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G_RAID3_BIO_PFLAG_VERIFY)
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/*
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* Informations needed for synchronization.
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*/
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struct g_raid3_disk_sync {
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struct g_consumer *ds_consumer; /* Consumer connected to our device. */
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off_t ds_offset; /* Offset of next request to send. */
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off_t ds_offset_done; /* Offset of already synchronized
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region. */
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off_t ds_resync; /* Resynchronize from this offset. */
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u_int ds_syncid; /* Disk's synchronization ID. */
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u_char *ds_data;
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};
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/*
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* Informations needed for synchronization.
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*/
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struct g_raid3_device_sync {
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struct g_geom *ds_geom; /* Synchronization geom. */
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};
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#define G_RAID3_DISK_STATE_NODISK 0
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#define G_RAID3_DISK_STATE_NONE 1
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#define G_RAID3_DISK_STATE_NEW 2
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#define G_RAID3_DISK_STATE_ACTIVE 3
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#define G_RAID3_DISK_STATE_STALE 4
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#define G_RAID3_DISK_STATE_SYNCHRONIZING 5
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#define G_RAID3_DISK_STATE_DISCONNECTED 6
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#define G_RAID3_DISK_STATE_DESTROY 7
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struct g_raid3_disk {
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u_int d_no; /* Disk number. */
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struct g_consumer *d_consumer; /* Consumer. */
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struct g_raid3_softc *d_softc; /* Back-pointer to softc. */
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int d_state; /* Disk state. */
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uint64_t d_flags; /* Additional flags. */
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u_int d_genid; /* Disk's generation ID. */
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struct g_raid3_disk_sync d_sync; /* Sync information. */
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LIST_ENTRY(g_raid3_disk) d_next;
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};
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#define d_name d_consumer->provider->name
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#define G_RAID3_EVENT_DONTWAIT 0x1
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#define G_RAID3_EVENT_WAIT 0x2
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#define G_RAID3_EVENT_DEVICE 0x4
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#define G_RAID3_EVENT_DONE 0x8
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struct g_raid3_event {
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struct g_raid3_disk *e_disk;
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int e_state;
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int e_flags;
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int e_error;
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TAILQ_ENTRY(g_raid3_event) e_next;
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};
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#define G_RAID3_DEVICE_FLAG_DESTROY 0x0100000000000000ULL
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#define G_RAID3_DEVICE_FLAG_WAIT 0x0200000000000000ULL
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#define G_RAID3_DEVICE_STATE_STARTING 0
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#define G_RAID3_DEVICE_STATE_DEGRADED 1
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#define G_RAID3_DEVICE_STATE_COMPLETE 2
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/* Bump syncid on first write. */
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#define G_RAID3_BUMP_SYNCID 0x1
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/* Bump genid immediately. */
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#define G_RAID3_BUMP_GENID 0x2
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struct g_raid3_softc {
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u_int sc_state; /* Device state. */
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uint64_t sc_mediasize; /* Device size. */
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uint32_t sc_sectorsize; /* Sector size. */
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uint64_t sc_flags; /* Additional flags. */
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struct g_geom *sc_geom;
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struct g_provider *sc_provider;
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uint32_t sc_id; /* Device unique ID. */
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struct bio_queue_head sc_queue;
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struct mtx sc_queue_mtx;
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struct proc *sc_worker;
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struct g_raid3_disk *sc_disks;
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u_int sc_ndisks; /* Number of disks. */
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u_int sc_round_robin;
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struct g_raid3_disk *sc_syncdisk;
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uma_zone_t sc_zone_64k;
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uma_zone_t sc_zone_16k;
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uma_zone_t sc_zone_4k;
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u_int sc_genid; /* Generation ID. */
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u_int sc_syncid; /* Synchronization ID. */
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int sc_bump_id;
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struct g_raid3_device_sync sc_sync;
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int sc_idle; /* DIRTY flags removed. */
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TAILQ_HEAD(, g_raid3_event) sc_events;
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struct mtx sc_events_mtx;
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struct callout sc_callout;
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};
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#define sc_name sc_geom->name
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const char *g_raid3_get_diskname(struct g_raid3_disk *disk);
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u_int g_raid3_ndisks(struct g_raid3_softc *sc, int state);
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int g_raid3_destroy(struct g_raid3_softc *sc, boolean_t force);
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int g_raid3_event_send(void *arg, int state, int flags);
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struct g_raid3_metadata;
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int g_raid3_add_disk(struct g_raid3_softc *sc, struct g_provider *pp,
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struct g_raid3_metadata *md);
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int g_raid3_read_metadata(struct g_consumer *cp, struct g_raid3_metadata *md);
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void g_raid3_fill_metadata(struct g_raid3_disk *disk,
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struct g_raid3_metadata *md);
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int g_raid3_clear_metadata(struct g_raid3_disk *disk);
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void g_raid3_update_metadata(struct g_raid3_disk *disk);
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g_ctl_req_t g_raid3_config;
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#endif /* _KERNEL */
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struct g_raid3_metadata {
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char md_magic[16]; /* Magic value. */
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uint32_t md_version; /* Version number. */
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char md_name[16]; /* Device name. */
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uint32_t md_id; /* Device unique ID. */
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uint16_t md_no; /* Component number. */
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uint16_t md_all; /* Number of disks in device. */
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uint32_t md_genid; /* Generation ID. */
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uint32_t md_syncid; /* Synchronization ID. */
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uint64_t md_mediasize; /* Size of whole device. */
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uint32_t md_sectorsize; /* Sector size. */
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uint64_t md_sync_offset; /* Synchronized offset. */
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uint64_t md_mflags; /* Additional device flags. */
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uint64_t md_dflags; /* Additional disk flags. */
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char md_provider[16]; /* Hardcoded provider. */
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u_char md_hash[16]; /* MD5 hash. */
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};
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static __inline void
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raid3_metadata_encode(struct g_raid3_metadata *md, u_char *data)
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{
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MD5_CTX ctx;
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bcopy(md->md_magic, data, 16);
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le32enc(data + 16, md->md_version);
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bcopy(md->md_name, data + 20, 16);
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le32enc(data + 36, md->md_id);
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le16enc(data + 40, md->md_no);
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le16enc(data + 42, md->md_all);
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le32enc(data + 44, md->md_genid);
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le32enc(data + 48, md->md_syncid);
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le64enc(data + 52, md->md_mediasize);
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le32enc(data + 60, md->md_sectorsize);
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le64enc(data + 64, md->md_sync_offset);
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le64enc(data + 72, md->md_mflags);
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le64enc(data + 80, md->md_dflags);
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bcopy(md->md_provider, data + 88, 16);
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MD5Init(&ctx);
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MD5Update(&ctx, data, 104);
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MD5Final(md->md_hash, &ctx);
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bcopy(md->md_hash, data + 104, 16);
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}
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static __inline int
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raid3_metadata_decode_v0v1v2(const u_char *data, struct g_raid3_metadata *md)
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{
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MD5_CTX ctx;
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bcopy(data + 20, md->md_name, 16);
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md->md_id = le32dec(data + 36);
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md->md_no = le16dec(data + 40);
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md->md_all = le16dec(data + 42);
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md->md_syncid = le32dec(data + 44);
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md->md_mediasize = le64dec(data + 48);
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md->md_sectorsize = le32dec(data + 56);
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md->md_sync_offset = le64dec(data + 60);
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md->md_mflags = le64dec(data + 68);
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md->md_dflags = le64dec(data + 76);
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bcopy(data + 84, md->md_provider, 16);
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bcopy(data + 100, md->md_hash, 16);
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MD5Init(&ctx);
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MD5Update(&ctx, data, 100);
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MD5Final(md->md_hash, &ctx);
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if (bcmp(md->md_hash, data + 100, 16) != 0)
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return (EINVAL);
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return (0);
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}
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static __inline int
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raid3_metadata_decode_v3(const u_char *data, struct g_raid3_metadata *md)
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{
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MD5_CTX ctx;
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bcopy(data + 20, md->md_name, 16);
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md->md_id = le32dec(data + 36);
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md->md_no = le16dec(data + 40);
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md->md_all = le16dec(data + 42);
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md->md_genid = le32dec(data + 44);
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md->md_syncid = le32dec(data + 48);
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md->md_mediasize = le64dec(data + 52);
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md->md_sectorsize = le32dec(data + 60);
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md->md_sync_offset = le64dec(data + 64);
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md->md_mflags = le64dec(data + 72);
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md->md_dflags = le64dec(data + 80);
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bcopy(data + 88, md->md_provider, 16);
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bcopy(data + 104, md->md_hash, 16);
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MD5Init(&ctx);
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MD5Update(&ctx, data, 104);
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MD5Final(md->md_hash, &ctx);
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if (bcmp(md->md_hash, data + 104, 16) != 0)
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return (EINVAL);
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return (0);
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}
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static __inline int
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raid3_metadata_decode(const u_char *data, struct g_raid3_metadata *md)
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{
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int error;
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bcopy(data, md->md_magic, 16);
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md->md_version = le32dec(data + 16);
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switch (md->md_version) {
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case 0:
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case 1:
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case 2:
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error = raid3_metadata_decode_v0v1v2(data, md);
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break;
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case 3:
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error = raid3_metadata_decode_v3(data, md);
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break;
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default:
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error = EINVAL;
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break;
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}
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return (error);
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}
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static __inline void
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raid3_metadata_dump(const struct g_raid3_metadata *md)
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{
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static const char hex[] = "0123456789abcdef";
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char hash[16 * 2 + 1];
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u_int i;
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printf(" magic: %s\n", md->md_magic);
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printf(" version: %u\n", (u_int)md->md_version);
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printf(" name: %s\n", md->md_name);
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printf(" id: %u\n", (u_int)md->md_id);
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printf(" no: %u\n", (u_int)md->md_no);
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printf(" all: %u\n", (u_int)md->md_all);
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printf(" genid: %u\n", (u_int)md->md_genid);
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printf(" syncid: %u\n", (u_int)md->md_syncid);
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printf(" mediasize: %jd\n", (intmax_t)md->md_mediasize);
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printf("sectorsize: %u\n", (u_int)md->md_sectorsize);
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printf("syncoffset: %jd\n", (intmax_t)md->md_sync_offset);
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printf(" mflags:");
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if (md->md_mflags == 0)
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printf(" NONE");
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else {
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if ((md->md_mflags & G_RAID3_DEVICE_FLAG_NOAUTOSYNC) != 0)
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printf(" NOAUTOSYNC");
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if ((md->md_mflags & G_RAID3_DEVICE_FLAG_ROUND_ROBIN) != 0)
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printf(" ROUND-ROBIN");
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if ((md->md_mflags & G_RAID3_DEVICE_FLAG_VERIFY) != 0)
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printf(" VERIFY");
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}
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printf("\n");
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printf(" dflags:");
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if (md->md_dflags == 0)
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printf(" NONE");
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else {
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if ((md->md_dflags & G_RAID3_DISK_FLAG_DIRTY) != 0)
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printf(" DIRTY");
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if ((md->md_dflags & G_RAID3_DISK_FLAG_SYNCHRONIZING) != 0)
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printf(" SYNCHRONIZING");
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if ((md->md_dflags & G_RAID3_DISK_FLAG_FORCE_SYNC) != 0)
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printf(" FORCE_SYNC");
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}
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printf("\n");
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printf("hcprovider: %s\n", md->md_provider);
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bzero(hash, sizeof(hash));
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for (i = 0; i < 16; i++) {
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hash[i * 2] = hex[md->md_hash[i] >> 4];
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hash[i * 2 + 1] = hex[md->md_hash[i] & 0x0f];
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}
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printf(" MD5 hash: %s\n", hash);
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}
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#endif /* !_G_RAID3_H_ */
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