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g_raid3.h
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Editing: g_raid3.h
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2004-2006 Pawel Jakub Dawidek <pjd@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_RAID3_H_ #define _G_RAID3_H_ #include <sys/endian.h> #include <sys/md5.h> #define G_RAID3_CLASS_NAME "RAID3" #define G_RAID3_MAGIC "GEOM::RAID3" /* * Version history: * 0 - Initial version number. * 1 - Added 'round-robin reading' algorithm. * 2 - Added 'verify reading' algorithm. * 3 - Added md_genid field to metadata. * 4 - Added md_provsize field to metadata. * 5 - Added 'no failure synchronization' flag. */ #define G_RAID3_VERSION 5 #define G_RAID3_DISK_FLAG_DIRTY 0x0000000000000001ULL #define G_RAID3_DISK_FLAG_SYNCHRONIZING 0x0000000000000002ULL #define G_RAID3_DISK_FLAG_FORCE_SYNC 0x0000000000000004ULL #define G_RAID3_DISK_FLAG_HARDCODED 0x0000000000000008ULL #define G_RAID3_DISK_FLAG_BROKEN 0x0000000000000010ULL #define G_RAID3_DISK_FLAG_MASK (G_RAID3_DISK_FLAG_DIRTY | \ G_RAID3_DISK_FLAG_SYNCHRONIZING | \ G_RAID3_DISK_FLAG_FORCE_SYNC) #define G_RAID3_DEVICE_FLAG_NOAUTOSYNC 0x0000000000000001ULL #define G_RAID3_DEVICE_FLAG_ROUND_ROBIN 0x0000000000000002ULL #define G_RAID3_DEVICE_FLAG_VERIFY 0x0000000000000004ULL #define G_RAID3_DEVICE_FLAG_NOFAILSYNC 0x0000000000000008ULL #define G_RAID3_DEVICE_FLAG_MASK (G_RAID3_DEVICE_FLAG_NOAUTOSYNC | \ G_RAID3_DEVICE_FLAG_ROUND_ROBIN | \ G_RAID3_DEVICE_FLAG_VERIFY | \ G_RAID3_DEVICE_FLAG_NOFAILSYNC) #ifdef _KERNEL extern u_int g_raid3_debug; #define G_RAID3_DEBUG(lvl, ...) \ _GEOM_DEBUG("GEOM_RAID3", g_raid3_debug, (lvl), NULL, __VA_ARGS__) #define G_RAID3_LOGREQ(lvl, bp, ...) \ _GEOM_DEBUG("GEOM_RAID3", g_raid3_debug, (lvl), (bp), __VA_ARGS__) #define G_RAID3_BIO_CFLAG_REGULAR 0x01 #define G_RAID3_BIO_CFLAG_SYNC 0x02 #define G_RAID3_BIO_CFLAG_PARITY 0x04 #define G_RAID3_BIO_CFLAG_NODISK 0x08 #define G_RAID3_BIO_CFLAG_REGSYNC 0x10 #define G_RAID3_BIO_CFLAG_MASK (G_RAID3_BIO_CFLAG_REGULAR | \ G_RAID3_BIO_CFLAG_SYNC | \ G_RAID3_BIO_CFLAG_PARITY | \ G_RAID3_BIO_CFLAG_NODISK | \ G_RAID3_BIO_CFLAG_REGSYNC) #define G_RAID3_BIO_PFLAG_DEGRADED 0x01 #define G_RAID3_BIO_PFLAG_NOPARITY 0x02 #define G_RAID3_BIO_PFLAG_VERIFY 0x04 #define G_RAID3_BIO_PFLAG_MASK (G_RAID3_BIO_PFLAG_DEGRADED | \ G_RAID3_BIO_PFLAG_NOPARITY | \ G_RAID3_BIO_PFLAG_VERIFY) /* * Informations needed for synchronization. */ struct g_raid3_disk_sync { struct g_consumer *ds_consumer; /* Consumer connected to our device. */ off_t ds_offset; /* Offset of next request to send. */ off_t ds_offset_done; /* Offset of already synchronized region. */ off_t ds_resync; /* Resynchronize from this offset. */ u_int ds_syncid; /* Disk's synchronization ID. */ u_int ds_inflight; /* Number of in-flight sync requests. */ struct bio **ds_bios; /* BIOs for synchronization I/O. */ }; /* * Informations needed for synchronization. */ struct g_raid3_device_sync { struct g_geom *ds_geom; /* Synchronization geom. */ }; #define G_RAID3_DISK_STATE_NODISK 0 #define G_RAID3_DISK_STATE_NONE 1 #define G_RAID3_DISK_STATE_NEW 2 #define G_RAID3_DISK_STATE_ACTIVE 3 #define G_RAID3_DISK_STATE_STALE 4 #define G_RAID3_DISK_STATE_SYNCHRONIZING 5 #define G_RAID3_DISK_STATE_DISCONNECTED 6 #define G_RAID3_DISK_STATE_DESTROY 7 struct g_raid3_disk { u_int d_no; /* Disk number. */ struct g_consumer *d_consumer; /* Consumer. */ struct g_raid3_softc *d_softc; /* Back-pointer to softc. */ int d_state; /* Disk state. */ uint64_t d_flags; /* Additional flags. */ u_int d_genid; /* Disk's generation ID. */ struct g_raid3_disk_sync d_sync; /* Sync information. */ LIST_ENTRY(g_raid3_disk) d_next; }; #define d_name d_consumer->provider->name #define G_RAID3_EVENT_DONTWAIT 0x1 #define G_RAID3_EVENT_WAIT 0x2 #define G_RAID3_EVENT_DEVICE 0x4 #define G_RAID3_EVENT_DONE 0x8 struct g_raid3_event { struct g_raid3_disk *e_disk; int e_state; int e_flags; int e_error; TAILQ_ENTRY(g_raid3_event) e_next; }; #define G_RAID3_DEVICE_FLAG_DESTROY 0x0100000000000000ULL #define G_RAID3_DEVICE_FLAG_WAIT 0x0200000000000000ULL #define G_RAID3_DEVICE_FLAG_DESTROYING 0x0400000000000000ULL #define G_RAID3_DEVICE_STATE_STARTING 0 #define G_RAID3_DEVICE_STATE_DEGRADED 1 #define G_RAID3_DEVICE_STATE_COMPLETE 2 /* Bump syncid on first write. */ #define G_RAID3_BUMP_SYNCID 0x1 /* Bump genid immediately. */ #define G_RAID3_BUMP_GENID 0x2 enum g_raid3_zones { G_RAID3_ZONE_64K, G_RAID3_ZONE_16K, G_RAID3_ZONE_4K, G_RAID3_NUM_ZONES }; static __inline enum g_raid3_zones g_raid3_zone(size_t nbytes) { if (nbytes > 65536) return (G_RAID3_NUM_ZONES); else if (nbytes > 16384) return (G_RAID3_ZONE_64K); else if (nbytes > 4096) return (G_RAID3_ZONE_16K); else return (G_RAID3_ZONE_4K); }; struct g_raid3_softc { u_int sc_state; /* Device state. */ uint64_t sc_mediasize; /* Device size. */ uint32_t sc_sectorsize; /* Sector size. */ uint64_t sc_flags; /* Additional flags. */ struct g_geom *sc_geom; struct g_provider *sc_provider; uint32_t sc_id; /* Device unique ID. */ struct sx sc_lock; struct bio_queue_head sc_queue; struct mtx sc_queue_mtx; struct proc *sc_worker; struct bio_queue_head sc_regular_delayed; /* Delayed I/O requests due collision with sync requests. */ struct bio_queue_head sc_inflight; /* In-flight regular write requests. */ struct bio_queue_head sc_sync_delayed; /* Delayed sync requests due collision with regular requests. */ struct g_raid3_disk *sc_disks; u_int sc_ndisks; /* Number of disks. */ u_int sc_round_robin; struct g_raid3_disk *sc_syncdisk; struct g_raid3_zone { uma_zone_t sz_zone; size_t sz_inuse; size_t sz_max; u_int sz_requested; u_int sz_failed; } sc_zones[G_RAID3_NUM_ZONES]; u_int sc_genid; /* Generation ID. */ u_int sc_syncid; /* Synchronization ID. */ int sc_bump_id; struct g_raid3_device_sync sc_sync; int sc_idle; /* DIRTY flags removed. */ time_t sc_last_write; u_int sc_writes; TAILQ_HEAD(, g_raid3_event) sc_events; struct mtx sc_events_mtx; struct callout sc_callout; struct root_hold_token *sc_rootmount; }; #define sc_name sc_geom->name const char *g_raid3_get_diskname(struct g_raid3_disk *disk); u_int g_raid3_ndisks(struct g_raid3_softc *sc, int state); #define G_RAID3_DESTROY_SOFT 0 #define G_RAID3_DESTROY_DELAYED 1 #define G_RAID3_DESTROY_HARD 2 int g_raid3_destroy(struct g_raid3_softc *sc, int how); int g_raid3_event_send(void *arg, int state, int flags); struct g_raid3_metadata; int g_raid3_add_disk(struct g_raid3_softc *sc, struct g_provider *pp, struct g_raid3_metadata *md); int g_raid3_read_metadata(struct g_consumer *cp, struct g_raid3_metadata *md); void g_raid3_fill_metadata(struct g_raid3_disk *disk, struct g_raid3_metadata *md); int g_raid3_clear_metadata(struct g_raid3_disk *disk); void g_raid3_update_metadata(struct g_raid3_disk *disk); g_ctl_req_t g_raid3_config; #endif /* _KERNEL */ struct g_raid3_metadata { char md_magic[16]; /* Magic value. */ uint32_t md_version; /* Version number. */ char md_name[16]; /* Device name. */ uint32_t md_id; /* Device unique ID. */ uint16_t md_no; /* Component number. */ uint16_t md_all; /* Number of disks in device. */ uint32_t md_genid; /* Generation ID. */ uint32_t md_syncid; /* Synchronization ID. */ uint64_t md_mediasize; /* Size of whole device. */ uint32_t md_sectorsize; /* Sector size. */ uint64_t md_sync_offset; /* Synchronized offset. */ uint64_t md_mflags; /* Additional device flags. */ uint64_t md_dflags; /* Additional disk flags. */ char md_provider[16]; /* Hardcoded provider. */ uint64_t md_provsize; /* Provider's size. */ u_char md_hash[16]; /* MD5 hash. */ }; static __inline void raid3_metadata_encode(struct g_raid3_metadata *md, u_char *data) { MD5_CTX ctx; bcopy(md->md_magic, data, 16); le32enc(data + 16, md->md_version); bcopy(md->md_name, data + 20, 16); le32enc(data + 36, md->md_id); le16enc(data + 40, md->md_no); le16enc(data + 42, md->md_all); le32enc(data + 44, md->md_genid); le32enc(data + 48, md->md_syncid); le64enc(data + 52, md->md_mediasize); le32enc(data + 60, md->md_sectorsize); le64enc(data + 64, md->md_sync_offset); le64enc(data + 72, md->md_mflags); le64enc(data + 80, md->md_dflags); bcopy(md->md_provider, data + 88, 16); le64enc(data + 104, md->md_provsize); MD5Init(&ctx); MD5Update(&ctx, data, 112); MD5Final(md->md_hash, &ctx); bcopy(md->md_hash, data + 112, 16); } static __inline int raid3_metadata_decode_v0v1v2(const u_char *data, struct g_raid3_metadata *md) { MD5_CTX ctx; bcopy(data + 20, md->md_name, 16); md->md_id = le32dec(data + 36); md->md_no = le16dec(data + 40); md->md_all = le16dec(data + 42); md->md_syncid = le32dec(data + 44); md->md_mediasize = le64dec(data + 48); md->md_sectorsize = le32dec(data + 56); md->md_sync_offset = le64dec(data + 60); md->md_mflags = le64dec(data + 68); md->md_dflags = le64dec(data + 76); bcopy(data + 84, md->md_provider, 16); bcopy(data + 100, md->md_hash, 16); MD5Init(&ctx); MD5Update(&ctx, data, 100); MD5Final(md->md_hash, &ctx); if (bcmp(md->md_hash, data + 100, 16) != 0) return (EINVAL); /* New fields. */ md->md_genid = 0; md->md_provsize = 0; return (0); } static __inline int raid3_metadata_decode_v3(const u_char *data, struct g_raid3_metadata *md) { MD5_CTX ctx; bcopy(data + 20, md->md_name, 16); md->md_id = le32dec(data + 36); md->md_no = le16dec(data + 40); md->md_all = le16dec(data + 42); md->md_genid = le32dec(data + 44); md->md_syncid = le32dec(data + 48); md->md_mediasize = le64dec(data + 52); md->md_sectorsize = le32dec(data + 60); md->md_sync_offset = le64dec(data + 64); md->md_mflags = le64dec(data + 72); md->md_dflags = le64dec(data + 80); bcopy(data + 88, md->md_provider, 16); bcopy(data + 104, md->md_hash, 16); MD5Init(&ctx); MD5Update(&ctx, data, 104); MD5Final(md->md_hash, &ctx); if (bcmp(md->md_hash, data + 104, 16) != 0) return (EINVAL); /* New fields. */ md->md_provsize = 0; return (0); } static __inline int raid3_metadata_decode_v4v5(const u_char *data, struct g_raid3_metadata *md) { MD5_CTX ctx; bcopy(data + 20, md->md_name, 16); md->md_id = le32dec(data + 36); md->md_no = le16dec(data + 40); md->md_all = le16dec(data + 42); md->md_genid = le32dec(data + 44); md->md_syncid = le32dec(data + 48); md->md_mediasize = le64dec(data + 52); md->md_sectorsize = le32dec(data + 60); md->md_sync_offset = le64dec(data + 64); md->md_mflags = le64dec(data + 72); md->md_dflags = le64dec(data + 80); bcopy(data + 88, md->md_provider, 16); md->md_provsize = le64dec(data + 104); bcopy(data + 112, md->md_hash, 16); MD5Init(&ctx); MD5Update(&ctx, data, 112); MD5Final(md->md_hash, &ctx); if (bcmp(md->md_hash, data + 112, 16) != 0) return (EINVAL); return (0); } static __inline int raid3_metadata_decode(const u_char *data, struct g_raid3_metadata *md) { int error; bcopy(data, md->md_magic, 16); md->md_version = le32dec(data + 16); switch (md->md_version) { case 0: case 1: case 2: error = raid3_metadata_decode_v0v1v2(data, md); break; case 3: error = raid3_metadata_decode_v3(data, md); break; case 4: case 5: error = raid3_metadata_decode_v4v5(data, md); break; default: error = EINVAL; break; } return (error); } static __inline void raid3_metadata_dump(const struct g_raid3_metadata *md) { static const char hex[] = "0123456789abcdef"; char hash[16 * 2 + 1]; u_int i; printf(" magic: %s\n", md->md_magic); printf(" version: %u\n", (u_int)md->md_version); printf(" name: %s\n", md->md_name); printf(" id: %u\n", (u_int)md->md_id); printf(" no: %u\n", (u_int)md->md_no); printf(" all: %u\n", (u_int)md->md_all); printf(" genid: %u\n", (u_int)md->md_genid); printf(" syncid: %u\n", (u_int)md->md_syncid); printf(" mediasize: %jd\n", (intmax_t)md->md_mediasize); printf("sectorsize: %u\n", (u_int)md->md_sectorsize); printf("syncoffset: %jd\n", (intmax_t)md->md_sync_offset); printf(" mflags:"); if (md->md_mflags == 0) printf(" NONE"); else { if ((md->md_mflags & G_RAID3_DEVICE_FLAG_NOAUTOSYNC) != 0) printf(" NOAUTOSYNC"); if ((md->md_mflags & G_RAID3_DEVICE_FLAG_ROUND_ROBIN) != 0) printf(" ROUND-ROBIN"); if ((md->md_mflags & G_RAID3_DEVICE_FLAG_VERIFY) != 0) printf(" VERIFY"); if ((md->md_mflags & G_RAID3_DEVICE_FLAG_NOFAILSYNC) != 0) printf(" NOFAILSYNC"); } printf("\n"); printf(" dflags:"); if (md->md_dflags == 0) printf(" NONE"); else { if ((md->md_dflags & G_RAID3_DISK_FLAG_DIRTY) != 0) printf(" DIRTY"); if ((md->md_dflags & G_RAID3_DISK_FLAG_SYNCHRONIZING) != 0) printf(" SYNCHRONIZING"); if ((md->md_dflags & G_RAID3_DISK_FLAG_FORCE_SYNC) != 0) printf(" FORCE_SYNC"); } printf("\n"); printf("hcprovider: %s\n", md->md_provider); printf(" provsize: %ju\n", (uintmax_t)md->md_provsize); bzero(hash, sizeof(hash)); for (i = 0; i < 16; i++) { hash[i * 2] = hex[md->md_hash[i] >> 4]; hash[i * 2 + 1] = hex[md->md_hash[i] & 0x0f]; } printf(" MD5 hash: %s\n", hash); } #endif /* !_G_RAID3_H_ */
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