fdb56713f2
some environment to differentiate 4 possible RAID5 on-disk layouts. Tested with Intel and AMD RAID BIOSes. MFC after: 2 weeks
408 lines
15 KiB
C
408 lines
15 KiB
C
/*-
|
|
* 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>
|
|
|
|
#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_read_err_thresh;
|
|
extern u_int g_raid_start_timeout;
|
|
extern struct g_class g_raid_class;
|
|
|
|
#define G_RAID_DEBUG(lvl, fmt, ...) do { \
|
|
if (g_raid_debug >= (lvl)) { \
|
|
if (g_raid_debug > 0) { \
|
|
printf("GEOM_RAID[%u]: " fmt "\n", \
|
|
lvl, ## __VA_ARGS__); \
|
|
} else { \
|
|
printf("GEOM_RAID: " fmt "\n", \
|
|
## __VA_ARGS__); \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
#define G_RAID_DEBUG1(lvl, sc, fmt, ...) do { \
|
|
if (g_raid_debug >= (lvl)) { \
|
|
if (g_raid_debug > 0) { \
|
|
printf("GEOM_RAID[%u]: %s: " fmt "\n", \
|
|
lvl, (sc)->sc_name, ## __VA_ARGS__); \
|
|
} else { \
|
|
printf("GEOM_RAID: %s: " fmt "\n", \
|
|
(sc)->sc_name, ## __VA_ARGS__); \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
#define G_RAID_LOGREQ(lvl, bp, fmt, ...) do { \
|
|
if (g_raid_debug >= (lvl)) { \
|
|
if (g_raid_debug > 0) { \
|
|
printf("GEOM_RAID[%u]: " fmt " ", \
|
|
lvl, ## __VA_ARGS__); \
|
|
} else \
|
|
printf("GEOM_RAID: " fmt " ", ## __VA_ARGS__); \
|
|
g_print_bio(bp); \
|
|
printf("\n"); \
|
|
} \
|
|
} while (0)
|
|
|
|
/*
|
|
* 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_FAILED 0x02 /* Failed. */
|
|
#define G_RAID_DISK_S_STALE_FAILED 0x03 /* Old failed. */
|
|
#define G_RAID_DISK_S_SPARE 0x04 /* Hot-spare. */
|
|
#define G_RAID_DISK_S_STALE 0x05 /* Old disk, unused now. */
|
|
#define G_RAID_DISK_S_ACTIVE 0x06 /* 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. */
|
|
struct g_kerneldump d_kd; /* Kernel dumping method/args. */
|
|
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. */
|
|
};
|
|
|
|
#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_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_UNKNOWN 0xff
|
|
|
|
#define G_RAID_VOLUME_RLQ_NONE 0x00
|
|
#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_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_strip_size; /* Array strip size. */
|
|
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). */
|
|
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
|
|
|
|
/*
|
|
* KOBJ parent class of metadata processing modules.
|
|
*/
|
|
struct g_raid_md_class {
|
|
KOBJ_CLASS_FIELDS;
|
|
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) \
|
|
static moduledata_t name##_mod = { \
|
|
#name, \
|
|
g_raid_md_modevent, \
|
|
&name##_class \
|
|
}; \
|
|
DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND); \
|
|
MODULE_DEPEND(name, geom_raid, 0, 0, 0)
|
|
|
|
/*
|
|
* KOBJ parent class of data transformation modules.
|
|
*/
|
|
struct g_raid_tr_class {
|
|
KOBJ_CLASS_FIELDS;
|
|
int trc_priority;
|
|
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) \
|
|
static moduledata_t name##_mod = { \
|
|
#name, \
|
|
g_raid_tr_modevent, \
|
|
&name##_class \
|
|
}; \
|
|
DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); \
|
|
MODULE_DEPEND(name, geom_raid, 0, 0, 0)
|
|
|
|
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 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);
|
|
|
|
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_ */
|