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g_raid.h
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md_ddf.h
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Editing: g_raid.h
/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2010 Alexander Motin <mav@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_RAID_H_ #define _G_RAID_H_ #include <sys/param.h> #include <sys/kobj.h> #include <sys/bio.h> #include <sys/time.h> #ifdef _KERNEL #include <sys/sysctl.h> #endif #define G_RAID_CLASS_NAME "RAID" #define G_RAID_MAGIC "GEOM::RAID" #define G_RAID_VERSION 0 struct g_raid_md_object; struct g_raid_tr_object; #define G_RAID_DEVICE_FLAG_NOAUTOSYNC 0x0000000000000001ULL #define G_RAID_DEVICE_FLAG_NOFAILSYNC 0x0000000000000002ULL #define G_RAID_DEVICE_FLAG_MASK (G_RAID_DEVICE_FLAG_NOAUTOSYNC | \ G_RAID_DEVICE_FLAG_NOFAILSYNC) #ifdef _KERNEL extern u_int g_raid_aggressive_spare; extern u_int g_raid_debug; extern int g_raid_enable; extern int g_raid_read_err_thresh; extern u_int g_raid_start_timeout; extern struct g_class g_raid_class; #define G_RAID_DEBUG(lvl, ...) \ _GEOM_DEBUG("GEOM_RAID", g_raid_debug, (lvl), NULL, __VA_ARGS__) #define G_RAID_DEBUG1(lvl, sc, fmt, ...) \ _GEOM_DEBUG("GEOM_RAID", g_raid_debug, (lvl), NULL, "%s: " fmt, \ (sc)->sc_name, ## __VA_ARGS__) #define G_RAID_LOGREQ(lvl, bp, ...) \ _GEOM_DEBUG("GEOM_RAID", g_raid_debug, (lvl), (bp), __VA_ARGS__) /* * Flags we use to distinguish I/O initiated by the TR layer to maintain * the volume's characteristics, fix subdisks, extra copies of data, etc. * * G_RAID_BIO_FLAG_SYNC I/O to update an extra copy of the data * for RAID volumes that maintain extra data * and need to rebuild that data. * G_RAID_BIO_FLAG_REMAP I/O done to try to provoke a subdisk into * doing some desirable action such as bad * block remapping after we detect a bad part * of the disk. * G_RAID_BIO_FLAG_LOCKED I/O holds range lock that should re released. * * and the following meta item: * G_RAID_BIO_FLAG_SPECIAL And of the I/O flags that need to make it * through the range locking which would * otherwise defer the I/O until after that * range is unlocked. */ #define G_RAID_BIO_FLAG_SYNC 0x01 #define G_RAID_BIO_FLAG_REMAP 0x02 #define G_RAID_BIO_FLAG_SPECIAL \ (G_RAID_BIO_FLAG_SYNC|G_RAID_BIO_FLAG_REMAP) #define G_RAID_BIO_FLAG_LOCKED 0x80 struct g_raid_lock { off_t l_offset; off_t l_length; void *l_callback_arg; int l_pending; LIST_ENTRY(g_raid_lock) l_next; }; #define G_RAID_EVENT_WAIT 0x01 #define G_RAID_EVENT_VOLUME 0x02 #define G_RAID_EVENT_SUBDISK 0x04 #define G_RAID_EVENT_DISK 0x08 #define G_RAID_EVENT_DONE 0x10 struct g_raid_event { void *e_tgt; int e_event; int e_flags; int e_error; TAILQ_ENTRY(g_raid_event) e_next; }; #define G_RAID_DISK_S_NONE 0x00 /* State is unknown. */ #define G_RAID_DISK_S_OFFLINE 0x01 /* Missing disk placeholder. */ #define G_RAID_DISK_S_DISABLED 0x02 /* Disabled. */ #define G_RAID_DISK_S_FAILED 0x03 /* Failed. */ #define G_RAID_DISK_S_STALE_FAILED 0x04 /* Old failed. */ #define G_RAID_DISK_S_SPARE 0x05 /* Hot-spare. */ #define G_RAID_DISK_S_STALE 0x06 /* Old disk, unused now. */ #define G_RAID_DISK_S_ACTIVE 0x07 /* Operational. */ #define G_RAID_DISK_E_DISCONNECTED 0x01 struct g_raid_disk { struct g_raid_softc *d_softc; /* Back-pointer to softc. */ struct g_consumer *d_consumer; /* GEOM disk consumer. */ void *d_md_data; /* Disk's metadata storage. */ int d_candelete; /* BIO_DELETE supported. */ uint64_t d_flags; /* Additional flags. */ u_int d_state; /* Disk state. */ u_int d_load; /* Disk average load. */ off_t d_last_offset; /* Last head offset. */ int d_read_errs; /* Count of the read errors */ TAILQ_HEAD(, g_raid_subdisk) d_subdisks; /* List of subdisks. */ TAILQ_ENTRY(g_raid_disk) d_next; /* Next disk in the node. */ struct g_kerneldump d_kd; /* Kernel dumping method/args. */ }; #define G_RAID_SUBDISK_S_NONE 0x00 /* Absent. */ #define G_RAID_SUBDISK_S_FAILED 0x01 /* Failed. */ #define G_RAID_SUBDISK_S_NEW 0x02 /* Blank. */ #define G_RAID_SUBDISK_S_REBUILD 0x03 /* Blank + rebuild. */ #define G_RAID_SUBDISK_S_UNINITIALIZED 0x04 /* Disk of the new volume. */ #define G_RAID_SUBDISK_S_STALE 0x05 /* Dirty. */ #define G_RAID_SUBDISK_S_RESYNC 0x06 /* Dirty + check/repair. */ #define G_RAID_SUBDISK_S_ACTIVE 0x07 /* Usable. */ #define G_RAID_SUBDISK_E_NEW 0x01 /* A new subdisk has arrived */ #define G_RAID_SUBDISK_E_FAILED 0x02 /* A subdisk failed, but remains in volume */ #define G_RAID_SUBDISK_E_DISCONNECTED 0x03 /* A subdisk removed from volume. */ #define G_RAID_SUBDISK_E_FIRST_TR_PRIVATE 0x80 /* translation private events */ #define G_RAID_SUBDISK_POS(sd) \ ((sd)->sd_disk ? ((sd)->sd_disk->d_last_offset - (sd)->sd_offset) : 0) #define G_RAID_SUBDISK_TRACK_SIZE (1 * 1024 * 1024) #define G_RAID_SUBDISK_LOAD(sd) \ ((sd)->sd_disk ? ((sd)->sd_disk->d_load) : 0) #define G_RAID_SUBDISK_LOAD_SCALE 256 struct g_raid_subdisk { struct g_raid_softc *sd_softc; /* Back-pointer to softc. */ struct g_raid_disk *sd_disk; /* Where this subdisk lives. */ struct g_raid_volume *sd_volume; /* Volume, sd is a part of. */ off_t sd_offset; /* Offset on the disk. */ off_t sd_size; /* Size on the disk. */ u_int sd_pos; /* Position in volume. */ u_int sd_state; /* Subdisk state. */ off_t sd_rebuild_pos; /* Rebuild position. */ int sd_recovery; /* Count of recovery reqs. */ TAILQ_ENTRY(g_raid_subdisk) sd_next; /* Next subdisk on disk. */ }; #define G_RAID_MAX_SUBDISKS 16 #define G_RAID_MAX_VOLUMENAME 32 #define G_RAID_VOLUME_S_STARTING 0x00 #define G_RAID_VOLUME_S_BROKEN 0x01 #define G_RAID_VOLUME_S_DEGRADED 0x02 #define G_RAID_VOLUME_S_SUBOPTIMAL 0x03 #define G_RAID_VOLUME_S_OPTIMAL 0x04 #define G_RAID_VOLUME_S_UNSUPPORTED 0x05 #define G_RAID_VOLUME_S_STOPPED 0x06 #define G_RAID_VOLUME_S_ALIVE(s) \ ((s) == G_RAID_VOLUME_S_DEGRADED || \ (s) == G_RAID_VOLUME_S_SUBOPTIMAL || \ (s) == G_RAID_VOLUME_S_OPTIMAL) #define G_RAID_VOLUME_E_DOWN 0x00 #define G_RAID_VOLUME_E_UP 0x01 #define G_RAID_VOLUME_E_START 0x10 #define G_RAID_VOLUME_E_STARTMD 0x11 #define G_RAID_VOLUME_RL_RAID0 0x00 #define G_RAID_VOLUME_RL_RAID1 0x01 #define G_RAID_VOLUME_RL_RAID3 0x03 #define G_RAID_VOLUME_RL_RAID4 0x04 #define G_RAID_VOLUME_RL_RAID5 0x05 #define G_RAID_VOLUME_RL_RAID6 0x06 #define G_RAID_VOLUME_RL_RAIDMDF 0x07 #define G_RAID_VOLUME_RL_RAID1E 0x11 #define G_RAID_VOLUME_RL_SINGLE 0x0f #define G_RAID_VOLUME_RL_CONCAT 0x1f #define G_RAID_VOLUME_RL_RAID5E 0x15 #define G_RAID_VOLUME_RL_RAID5EE 0x25 #define G_RAID_VOLUME_RL_RAID5R 0x35 #define G_RAID_VOLUME_RL_UNKNOWN 0xff #define G_RAID_VOLUME_RLQ_NONE 0x00 #define G_RAID_VOLUME_RLQ_R1SM 0x00 #define G_RAID_VOLUME_RLQ_R1MM 0x01 #define G_RAID_VOLUME_RLQ_R3P0 0x00 #define G_RAID_VOLUME_RLQ_R3PN 0x01 #define G_RAID_VOLUME_RLQ_R4P0 0x00 #define G_RAID_VOLUME_RLQ_R4PN 0x01 #define G_RAID_VOLUME_RLQ_R5RA 0x00 #define G_RAID_VOLUME_RLQ_R5RS 0x01 #define G_RAID_VOLUME_RLQ_R5LA 0x02 #define G_RAID_VOLUME_RLQ_R5LS 0x03 #define G_RAID_VOLUME_RLQ_R6RA 0x00 #define G_RAID_VOLUME_RLQ_R6RS 0x01 #define G_RAID_VOLUME_RLQ_R6LA 0x02 #define G_RAID_VOLUME_RLQ_R6LS 0x03 #define G_RAID_VOLUME_RLQ_RMDFRA 0x00 #define G_RAID_VOLUME_RLQ_RMDFRS 0x01 #define G_RAID_VOLUME_RLQ_RMDFLA 0x02 #define G_RAID_VOLUME_RLQ_RMDFLS 0x03 #define G_RAID_VOLUME_RLQ_R1EA 0x00 #define G_RAID_VOLUME_RLQ_R1EO 0x01 #define G_RAID_VOLUME_RLQ_R5ERA 0x00 #define G_RAID_VOLUME_RLQ_R5ERS 0x01 #define G_RAID_VOLUME_RLQ_R5ELA 0x02 #define G_RAID_VOLUME_RLQ_R5ELS 0x03 #define G_RAID_VOLUME_RLQ_R5EERA 0x00 #define G_RAID_VOLUME_RLQ_R5EERS 0x01 #define G_RAID_VOLUME_RLQ_R5EELA 0x02 #define G_RAID_VOLUME_RLQ_R5EELS 0x03 #define G_RAID_VOLUME_RLQ_R5RRA 0x00 #define G_RAID_VOLUME_RLQ_R5RRS 0x01 #define G_RAID_VOLUME_RLQ_R5RLA 0x02 #define G_RAID_VOLUME_RLQ_R5RLS 0x03 #define G_RAID_VOLUME_RLQ_UNKNOWN 0xff struct g_raid_volume; struct g_raid_volume { struct g_raid_softc *v_softc; /* Back-pointer to softc. */ struct g_provider *v_provider; /* GEOM provider. */ struct g_raid_subdisk v_subdisks[G_RAID_MAX_SUBDISKS]; /* Subdisks of this volume. */ void *v_md_data; /* Volume's metadata storage. */ struct g_raid_tr_object *v_tr; /* Transformation object. */ char v_name[G_RAID_MAX_VOLUMENAME]; /* Volume name. */ u_int v_state; /* Volume state. */ u_int v_raid_level; /* Array RAID level. */ u_int v_raid_level_qualifier; /* RAID level det. */ u_int v_disks_count; /* Number of disks in array. */ u_int v_mdf_pdisks; /* Number of parity disks in RAIDMDF array. */ uint16_t v_mdf_polynomial; /* Polynomial for RAIDMDF. */ uint8_t v_mdf_method; /* Generation method for RAIDMDF. */ u_int v_strip_size; /* Array strip size. */ u_int v_rotate_parity; /* Rotate RAID5R parity after numer of stripes. */ u_int v_sectorsize; /* Volume sector size. */ off_t v_mediasize; /* Volume media size. */ struct bio_queue_head v_inflight; /* In-flight write requests. */ struct bio_queue_head v_locked; /* Blocked I/O requests. */ LIST_HEAD(, g_raid_lock) v_locks; /* List of locked regions. */ int v_pending_lock; /* writes to locked region */ int v_dirty; /* Volume is DIRTY. */ struct timeval v_last_done; /* Time of the last I/O. */ time_t v_last_write; /* Time of the last write. */ u_int v_writes; /* Number of active writes. */ struct root_hold_token *v_rootmount; /* Root mount delay token. */ int v_starting; /* Volume is starting */ int v_stopping; /* Volume is stopping */ int v_provider_open; /* Number of opens. */ int v_global_id; /* Global volume ID (rX). */ int v_read_only; /* Volume is read-only. */ TAILQ_ENTRY(g_raid_volume) v_next; /* List of volumes entry. */ LIST_ENTRY(g_raid_volume) v_global_next; /* Global list entry. */ }; #define G_RAID_NODE_E_WAKE 0x00 #define G_RAID_NODE_E_START 0x01 struct g_raid_softc { struct g_raid_md_object *sc_md; /* Metadata object. */ struct g_geom *sc_geom; /* GEOM class instance. */ uint64_t sc_flags; /* Additional flags. */ TAILQ_HEAD(, g_raid_volume) sc_volumes; /* List of volumes. */ TAILQ_HEAD(, g_raid_disk) sc_disks; /* List of disks. */ struct sx sc_lock; /* Main node lock. */ struct proc *sc_worker; /* Worker process. */ struct mtx sc_queue_mtx; /* Worker queues lock. */ TAILQ_HEAD(, g_raid_event) sc_events; /* Worker events queue. */ struct bio_queue_head sc_queue; /* Worker I/O queue. */ int sc_stopping; /* Node is stopping */ }; #define sc_name sc_geom->name SYSCTL_DECL(_kern_geom_raid); /* * KOBJ parent class of metadata processing modules. */ struct g_raid_md_class { KOBJ_CLASS_FIELDS; int mdc_enable; int mdc_priority; LIST_ENTRY(g_raid_md_class) mdc_list; }; /* * KOBJ instance of metadata processing module. */ struct g_raid_md_object { KOBJ_FIELDS; struct g_raid_md_class *mdo_class; struct g_raid_softc *mdo_softc; /* Back-pointer to softc. */ }; int g_raid_md_modevent(module_t, int, void *); #define G_RAID_MD_DECLARE(name, label) \ static moduledata_t g_raid_md_##name##_mod = { \ "g_raid_md_" __XSTRING(name), \ g_raid_md_modevent, \ &g_raid_md_##name##_class \ }; \ DECLARE_MODULE(g_raid_md_##name, g_raid_md_##name##_mod, \ SI_SUB_DRIVERS, SI_ORDER_SECOND); \ MODULE_DEPEND(g_raid_md_##name, geom_raid, 0, 0, 0); \ SYSCTL_NODE(_kern_geom_raid, OID_AUTO, name, \ CTLFLAG_RD | CTLFLAG_MPSAFE, \ NULL, label " metadata module"); \ SYSCTL_INT(_kern_geom_raid_##name, OID_AUTO, enable, \ CTLFLAG_RWTUN, &g_raid_md_##name##_class.mdc_enable, 0, \ "Enable " label " metadata format taste") /* * KOBJ parent class of data transformation modules. */ struct g_raid_tr_class { KOBJ_CLASS_FIELDS; int trc_enable; int trc_priority; int trc_accept_unmapped; LIST_ENTRY(g_raid_tr_class) trc_list; }; /* * KOBJ instance of data transformation module. */ struct g_raid_tr_object { KOBJ_FIELDS; struct g_raid_tr_class *tro_class; struct g_raid_volume *tro_volume; /* Back-pointer to volume. */ }; int g_raid_tr_modevent(module_t, int, void *); #define G_RAID_TR_DECLARE(name, label) \ static moduledata_t g_raid_tr_##name##_mod = { \ "g_raid_tr_" __XSTRING(name), \ g_raid_tr_modevent, \ &g_raid_tr_##name##_class \ }; \ DECLARE_MODULE(g_raid_tr_##name, g_raid_tr_##name##_mod, \ SI_SUB_DRIVERS, SI_ORDER_FIRST); \ MODULE_DEPEND(g_raid_tr_##name, geom_raid, 0, 0, 0); \ SYSCTL_NODE(_kern_geom_raid, OID_AUTO, name, \ CTLFLAG_RD | CTLFLAG_MPSAFE, \ NULL, label " transformation module"); \ SYSCTL_INT(_kern_geom_raid_##name, OID_AUTO, enable, \ CTLFLAG_RWTUN, &g_raid_tr_##name##_class.trc_enable, 0, \ "Enable " label " transformation module taste") const char * g_raid_volume_level2str(int level, int qual); int g_raid_volume_str2level(const char *str, int *level, int *qual); const char * g_raid_volume_state2str(int state); const char * g_raid_subdisk_state2str(int state); const char * g_raid_disk_state2str(int state); struct g_raid_softc * g_raid_create_node(struct g_class *mp, const char *name, struct g_raid_md_object *md); int g_raid_create_node_format(const char *format, struct gctl_req *req, struct g_geom **gp); struct g_raid_volume * g_raid_create_volume(struct g_raid_softc *sc, const char *name, int id); struct g_raid_disk * g_raid_create_disk(struct g_raid_softc *sc); const char * g_raid_get_diskname(struct g_raid_disk *disk); void g_raid_get_disk_info(struct g_raid_disk *disk); int g_raid_start_volume(struct g_raid_volume *vol); int g_raid_destroy_node(struct g_raid_softc *sc, int worker); int g_raid_destroy_volume(struct g_raid_volume *vol); int g_raid_destroy_disk(struct g_raid_disk *disk); void g_raid_iodone(struct bio *bp, int error); void g_raid_subdisk_iostart(struct g_raid_subdisk *sd, struct bio *bp); int g_raid_subdisk_kerneldump(struct g_raid_subdisk *sd, void *virtual, vm_offset_t physical, off_t offset, size_t length); struct g_consumer *g_raid_open_consumer(struct g_raid_softc *sc, const char *name); void g_raid_kill_consumer(struct g_raid_softc *sc, struct g_consumer *cp); void g_raid_report_disk_state(struct g_raid_disk *disk); void g_raid_change_disk_state(struct g_raid_disk *disk, int state); void g_raid_change_subdisk_state(struct g_raid_subdisk *sd, int state); void g_raid_change_volume_state(struct g_raid_volume *vol, int state); void g_raid_write_metadata(struct g_raid_softc *sc, struct g_raid_volume *vol, struct g_raid_subdisk *sd, struct g_raid_disk *disk); void g_raid_fail_disk(struct g_raid_softc *sc, struct g_raid_subdisk *sd, struct g_raid_disk *disk); void g_raid_tr_flush_common(struct g_raid_tr_object *tr, struct bio *bp); int g_raid_tr_kerneldump_common(struct g_raid_tr_object *tr, void *virtual, vm_offset_t physical, off_t offset, size_t length); u_int g_raid_ndisks(struct g_raid_softc *sc, int state); u_int g_raid_nsubdisks(struct g_raid_volume *vol, int state); u_int g_raid_nopens(struct g_raid_softc *sc); struct g_raid_subdisk * g_raid_get_subdisk(struct g_raid_volume *vol, int state); #define G_RAID_DESTROY_SOFT 0 #define G_RAID_DESTROY_DELAYED 1 #define G_RAID_DESTROY_HARD 2 int g_raid_destroy(struct g_raid_softc *sc, int how); int g_raid_event_send(void *arg, int event, int flags); int g_raid_lock_range(struct g_raid_volume *vol, off_t off, off_t len, struct bio *ignore, void *argp); int g_raid_unlock_range(struct g_raid_volume *vol, off_t off, off_t len); g_ctl_req_t g_raid_ctl; #endif /* _KERNEL */ #endif /* !_G_RAID_H_ */
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