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g_raid.c
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2010 Alexander Motin <[email protected]>
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/bio.h>
#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/eventhandler.h>
#include <vm/uma.h>
#include <geom/geom.h>
#include <sys/proc.h>
#include <sys/kthread.h>
#include <sys/sched.h>
#include <geom/raid/g_raid.h>
#include "g_raid_md_if.h"
#include "g_raid_tr_if.h"
static MALLOC_DEFINE(M_RAID, "raid_data", "GEOM_RAID Data");
SYSCTL_DECL(_kern_geom);
SYSCTL_NODE(_kern_geom, OID_AUTO, raid, CTLFLAG_RW, 0, "GEOM_RAID stuff");
int g_raid_enable = 1;
SYSCTL_INT(_kern_geom_raid, OID_AUTO, enable, CTLFLAG_RWTUN,
&g_raid_enable, 0, "Enable on-disk metadata taste");
u_int g_raid_aggressive_spare = 0;
SYSCTL_UINT(_kern_geom_raid, OID_AUTO, aggressive_spare, CTLFLAG_RWTUN,
&g_raid_aggressive_spare, 0, "Use disks without metadata as spare");
u_int g_raid_debug = 0;
SYSCTL_UINT(_kern_geom_raid, OID_AUTO, debug, CTLFLAG_RWTUN, &g_raid_debug, 0,
"Debug level");
int g_raid_read_err_thresh = 10;
SYSCTL_UINT(_kern_geom_raid, OID_AUTO, read_err_thresh, CTLFLAG_RWTUN,
&g_raid_read_err_thresh, 0,
"Number of read errors equated to disk failure");
u_int g_raid_start_timeout = 30;
SYSCTL_UINT(_kern_geom_raid, OID_AUTO, start_timeout, CTLFLAG_RWTUN,
&g_raid_start_timeout, 0,
"Time to wait for all array components");
static u_int g_raid_clean_time = 5;
SYSCTL_UINT(_kern_geom_raid, OID_AUTO, clean_time, CTLFLAG_RWTUN,
&g_raid_clean_time, 0, "Mark volume as clean when idling");
static u_int g_raid_disconnect_on_failure = 1;
SYSCTL_UINT(_kern_geom_raid, OID_AUTO, disconnect_on_failure, CTLFLAG_RWTUN,
&g_raid_disconnect_on_failure, 0, "Disconnect component on I/O failure.");
static u_int g_raid_name_format = 0;
SYSCTL_UINT(_kern_geom_raid, OID_AUTO, name_format, CTLFLAG_RWTUN,
&g_raid_name_format, 0, "Providers name format.");
static u_int g_raid_idle_threshold = 1000000;
SYSCTL_UINT(_kern_geom_raid, OID_AUTO, idle_threshold, CTLFLAG_RWTUN,
&g_raid_idle_threshold, 1000000,
"Time in microseconds to consider a volume idle.");
#define MSLEEP(rv, ident, mtx, priority, wmesg, timeout) do { \
G_RAID_DEBUG(4, "%s: Sleeping %p.", __func__, (ident)); \
rv = msleep((ident), (mtx), (priority), (wmesg), (timeout)); \
G_RAID_DEBUG(4, "%s: Woken up %p.", __func__, (ident)); \
} while (0)
LIST_HEAD(, g_raid_md_class) g_raid_md_classes =
LIST_HEAD_INITIALIZER(g_raid_md_classes);
LIST_HEAD(, g_raid_tr_class) g_raid_tr_classes =
LIST_HEAD_INITIALIZER(g_raid_tr_classes);
LIST_HEAD(, g_raid_volume) g_raid_volumes =
LIST_HEAD_INITIALIZER(g_raid_volumes);
static eventhandler_tag g_raid_post_sync = NULL;
static int g_raid_started = 0;
static int g_raid_shutdown = 0;
static int g_raid_destroy_geom(struct gctl_req *req, struct g_class *mp,
struct g_geom *gp);
static g_taste_t g_raid_taste;
static void g_raid_init(struct g_class *mp);
static void g_raid_fini(struct g_class *mp);
struct g_class g_raid_class = {
.name = G_RAID_CLASS_NAME,
.version = G_VERSION,
.ctlreq = g_raid_ctl,
.taste = g_raid_taste,
.destroy_geom = g_raid_destroy_geom,
.init = g_raid_init,
.fini = g_raid_fini
};
static void g_raid_destroy_provider(struct g_raid_volume *vol);
static int g_raid_update_disk(struct g_raid_disk *disk, u_int event);
static int g_raid_update_subdisk(struct g_raid_subdisk *subdisk, u_int event);
static int g_raid_update_volume(struct g_raid_volume *vol, u_int event);
static int g_raid_update_node(struct g_raid_softc *sc, u_int event);
static void g_raid_dumpconf(struct sbuf *sb, const char *indent,
struct g_geom *gp, struct g_consumer *cp, struct g_provider *pp);
static void g_raid_start(struct bio *bp);
static void g_raid_start_request(struct bio *bp);
static void g_raid_disk_done(struct bio *bp);
static void g_raid_poll(struct g_raid_softc *sc);
static const char *
g_raid_node_event2str(int event)
{
switch (event) {
case G_RAID_NODE_E_WAKE:
return ("WAKE");
case G_RAID_NODE_E_START:
return ("START");
default:
return ("INVALID");
}
}
const char *
g_raid_disk_state2str(int state)
{
switch (state) {
case G_RAID_DISK_S_NONE:
return ("NONE");
case G_RAID_DISK_S_OFFLINE:
return ("OFFLINE");
case G_RAID_DISK_S_DISABLED:
return ("DISABLED");
case G_RAID_DISK_S_FAILED:
return ("FAILED");
case G_RAID_DISK_S_STALE_FAILED:
return ("STALE_FAILED");
case G_RAID_DISK_S_SPARE:
return ("SPARE");
case G_RAID_DISK_S_STALE:
return ("STALE");
case G_RAID_DISK_S_ACTIVE:
return ("ACTIVE");
default:
return ("INVALID");
}
}
static const char *
g_raid_disk_event2str(int event)
{
switch (event) {
case G_RAID_DISK_E_DISCONNECTED:
return ("DISCONNECTED");
default:
return ("INVALID");
}
}
const char *
g_raid_subdisk_state2str(int state)
{
switch (state) {
case G_RAID_SUBDISK_S_NONE:
return ("NONE");
case G_RAID_SUBDISK_S_FAILED:
return ("FAILED");
case G_RAID_SUBDISK_S_NEW:
return ("NEW");
case G_RAID_SUBDISK_S_REBUILD:
return ("REBUILD");
case G_RAID_SUBDISK_S_UNINITIALIZED:
return ("UNINITIALIZED");
case G_RAID_SUBDISK_S_STALE:
return ("STALE");
case G_RAID_SUBDISK_S_RESYNC:
return ("RESYNC");
case G_RAID_SUBDISK_S_ACTIVE:
return ("ACTIVE");
default:
return ("INVALID");
}
}
static const char *
g_raid_subdisk_event2str(int event)
{
switch (event) {
case G_RAID_SUBDISK_E_NEW:
return ("NEW");
case G_RAID_SUBDISK_E_FAILED:
return ("FAILED");
case G_RAID_SUBDISK_E_DISCONNECTED:
return ("DISCONNECTED");
default:
return ("INVALID");
}
}
const char *
g_raid_volume_state2str(int state)
{
switch (state) {
case G_RAID_VOLUME_S_STARTING:
return ("STARTING");
case G_RAID_VOLUME_S_BROKEN:
return ("BROKEN");
case G_RAID_VOLUME_S_DEGRADED:
return ("DEGRADED");
case G_RAID_VOLUME_S_SUBOPTIMAL:
return ("SUBOPTIMAL");
case G_RAID_VOLUME_S_OPTIMAL:
return ("OPTIMAL");
case G_RAID_VOLUME_S_UNSUPPORTED:
return ("UNSUPPORTED");
case G_RAID_VOLUME_S_STOPPED:
return ("STOPPED");
default:
return ("INVALID");
}
}
static const char *
g_raid_volume_event2str(int event)
{
switch (event) {
case G_RAID_VOLUME_E_UP:
return ("UP");
case G_RAID_VOLUME_E_DOWN:
return ("DOWN");
case G_RAID_VOLUME_E_START:
return ("START");
case G_RAID_VOLUME_E_STARTMD:
return ("STARTMD");
default:
return ("INVALID");
}
}
const char *
g_raid_volume_level2str(int level, int qual)
{
switch (level) {
case G_RAID_VOLUME_RL_RAID0:
return ("RAID0");
case G_RAID_VOLUME_RL_RAID1:
return ("RAID1");
case G_RAID_VOLUME_RL_RAID3:
if (qual == G_RAID_VOLUME_RLQ_R3P0)
return ("RAID3-P0");
if (qual == G_RAID_VOLUME_RLQ_R3PN)
return ("RAID3-PN");
return ("RAID3");
case G_RAID_VOLUME_RL_RAID4:
if (qual == G_RAID_VOLUME_RLQ_R4P0)
return ("RAID4-P0");
if (qual == G_RAID_VOLUME_RLQ_R4PN)
return ("RAID4-PN");
return ("RAID4");
case G_RAID_VOLUME_RL_RAID5:
if (qual == G_RAID_VOLUME_RLQ_R5RA)
return ("RAID5-RA");
if (qual == G_RAID_VOLUME_RLQ_R5RS)
return ("RAID5-RS");
if (qual == G_RAID_VOLUME_RLQ_R5LA)
return ("RAID5-LA");
if (qual == G_RAID_VOLUME_RLQ_R5LS)
return ("RAID5-LS");
return ("RAID5");
case G_RAID_VOLUME_RL_RAID6:
if (qual == G_RAID_VOLUME_RLQ_R6RA)
return ("RAID6-RA");
if (qual == G_RAID_VOLUME_RLQ_R6RS)
return ("RAID6-RS");
if (qual == G_RAID_VOLUME_RLQ_R6LA)
return ("RAID6-LA");
if (qual == G_RAID_VOLUME_RLQ_R6LS)
return ("RAID6-LS");
return ("RAID6");
case G_RAID_VOLUME_RL_RAIDMDF:
if (qual == G_RAID_VOLUME_RLQ_RMDFRA)
return ("RAIDMDF-RA");
if (qual == G_RAID_VOLUME_RLQ_RMDFRS)
return ("RAIDMDF-RS");
if (qual == G_RAID_VOLUME_RLQ_RMDFLA)
return ("RAIDMDF-LA");
if (qual == G_RAID_VOLUME_RLQ_RMDFLS)
return ("RAIDMDF-LS");
return ("RAIDMDF");
case G_RAID_VOLUME_RL_RAID1E:
if (qual == G_RAID_VOLUME_RLQ_R1EA)
return ("RAID1E-A");
if (qual == G_RAID_VOLUME_RLQ_R1EO)
return ("RAID1E-O");
return ("RAID1E");
case G_RAID_VOLUME_RL_SINGLE:
return ("SINGLE");
case G_RAID_VOLUME_RL_CONCAT:
return ("CONCAT");
case G_RAID_VOLUME_RL_RAID5E:
if (qual == G_RAID_VOLUME_RLQ_R5ERA)
return ("RAID5E-RA");
if (qual == G_RAID_VOLUME_RLQ_R5ERS)
return ("RAID5E-RS");
if (qual == G_RAID_VOLUME_RLQ_R5ELA)
return ("RAID5E-LA");
if (qual == G_RAID_VOLUME_RLQ_R5ELS)
return ("RAID5E-LS");
return ("RAID5E");
case G_RAID_VOLUME_RL_RAID5EE:
if (qual == G_RAID_VOLUME_RLQ_R5EERA)
return ("RAID5EE-RA");
if (qual == G_RAID_VOLUME_RLQ_R5EERS)
return ("RAID5EE-RS");
if (qual == G_RAID_VOLUME_RLQ_R5EELA)
return ("RAID5EE-LA");
if (qual == G_RAID_VOLUME_RLQ_R5EELS)
return ("RAID5EE-LS");
return ("RAID5EE");
case G_RAID_VOLUME_RL_RAID5R:
if (qual == G_RAID_VOLUME_RLQ_R5RRA)
return ("RAID5R-RA");
if (qual == G_RAID_VOLUME_RLQ_R5RRS)
return ("RAID5R-RS");
if (qual == G_RAID_VOLUME_RLQ_R5RLA)
return ("RAID5R-LA");
if (qual == G_RAID_VOLUME_RLQ_R5RLS)
return ("RAID5R-LS");
return ("RAID5E");
default:
return ("UNKNOWN");
}
}
int
g_raid_volume_str2level(const char *str, int *level, int *qual)
{
*level = G_RAID_VOLUME_RL_UNKNOWN;
*qual = G_RAID_VOLUME_RLQ_NONE;
if (strcasecmp(str, "RAID0") == 0)
*level = G_RAID_VOLUME_RL_RAID0;
else if (strcasecmp(str, "RAID1") == 0)
*level = G_RAID_VOLUME_RL_RAID1;
else if (strcasecmp(str, "RAID3-P0") == 0) {
*level = G_RAID_VOLUME_RL_RAID3;
*qual = G_RAID_VOLUME_RLQ_R3P0;
} else if (strcasecmp(str, "RAID3-PN") == 0 ||
strcasecmp(str, "RAID3") == 0) {
*level = G_RAID_VOLUME_RL_RAID3;
*qual = G_RAID_VOLUME_RLQ_R3PN;
} else if (strcasecmp(str, "RAID4-P0") == 0) {
*level = G_RAID_VOLUME_RL_RAID4;
*qual = G_RAID_VOLUME_RLQ_R4P0;
} else if (strcasecmp(str, "RAID4-PN") == 0 ||
strcasecmp(str, "RAID4") == 0) {
*level = G_RAID_VOLUME_RL_RAID4;
*qual = G_RAID_VOLUME_RLQ_R4PN;
} else if (strcasecmp(str, "RAID5-RA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5;
*qual = G_RAID_VOLUME_RLQ_R5RA;
} else if (strcasecmp(str, "RAID5-RS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5;
*qual = G_RAID_VOLUME_RLQ_R5RS;
} else if (strcasecmp(str, "RAID5") == 0 ||
strcasecmp(str, "RAID5-LA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5;
*qual = G_RAID_VOLUME_RLQ_R5LA;
} else if (strcasecmp(str, "RAID5-LS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5;
*qual = G_RAID_VOLUME_RLQ_R5LS;
} else if (strcasecmp(str, "RAID6-RA") == 0) {
*level = G_RAID_VOLUME_RL_RAID6;
*qual = G_RAID_VOLUME_RLQ_R6RA;
} else if (strcasecmp(str, "RAID6-RS") == 0) {
*level = G_RAID_VOLUME_RL_RAID6;
*qual = G_RAID_VOLUME_RLQ_R6RS;
} else if (strcasecmp(str, "RAID6") == 0 ||
strcasecmp(str, "RAID6-LA") == 0) {
*level = G_RAID_VOLUME_RL_RAID6;
*qual = G_RAID_VOLUME_RLQ_R6LA;
} else if (strcasecmp(str, "RAID6-LS") == 0) {
*level = G_RAID_VOLUME_RL_RAID6;
*qual = G_RAID_VOLUME_RLQ_R6LS;
} else if (strcasecmp(str, "RAIDMDF-RA") == 0) {
*level = G_RAID_VOLUME_RL_RAIDMDF;
*qual = G_RAID_VOLUME_RLQ_RMDFRA;
} else if (strcasecmp(str, "RAIDMDF-RS") == 0) {
*level = G_RAID_VOLUME_RL_RAIDMDF;
*qual = G_RAID_VOLUME_RLQ_RMDFRS;
} else if (strcasecmp(str, "RAIDMDF") == 0 ||
strcasecmp(str, "RAIDMDF-LA") == 0) {
*level = G_RAID_VOLUME_RL_RAIDMDF;
*qual = G_RAID_VOLUME_RLQ_RMDFLA;
} else if (strcasecmp(str, "RAIDMDF-LS") == 0) {
*level = G_RAID_VOLUME_RL_RAIDMDF;
*qual = G_RAID_VOLUME_RLQ_RMDFLS;
} else if (strcasecmp(str, "RAID10") == 0 ||
strcasecmp(str, "RAID1E") == 0 ||
strcasecmp(str, "RAID1E-A") == 0) {
*level = G_RAID_VOLUME_RL_RAID1E;
*qual = G_RAID_VOLUME_RLQ_R1EA;
} else if (strcasecmp(str, "RAID1E-O") == 0) {
*level = G_RAID_VOLUME_RL_RAID1E;
*qual = G_RAID_VOLUME_RLQ_R1EO;
} else if (strcasecmp(str, "SINGLE") == 0)
*level = G_RAID_VOLUME_RL_SINGLE;
else if (strcasecmp(str, "CONCAT") == 0)
*level = G_RAID_VOLUME_RL_CONCAT;
else if (strcasecmp(str, "RAID5E-RA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5E;
*qual = G_RAID_VOLUME_RLQ_R5ERA;
} else if (strcasecmp(str, "RAID5E-RS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5E;
*qual = G_RAID_VOLUME_RLQ_R5ERS;
} else if (strcasecmp(str, "RAID5E") == 0 ||
strcasecmp(str, "RAID5E-LA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5E;
*qual = G_RAID_VOLUME_RLQ_R5ELA;
} else if (strcasecmp(str, "RAID5E-LS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5E;
*qual = G_RAID_VOLUME_RLQ_R5ELS;
} else if (strcasecmp(str, "RAID5EE-RA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5EE;
*qual = G_RAID_VOLUME_RLQ_R5EERA;
} else if (strcasecmp(str, "RAID5EE-RS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5EE;
*qual = G_RAID_VOLUME_RLQ_R5EERS;
} else if (strcasecmp(str, "RAID5EE") == 0 ||
strcasecmp(str, "RAID5EE-LA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5EE;
*qual = G_RAID_VOLUME_RLQ_R5EELA;
} else if (strcasecmp(str, "RAID5EE-LS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5EE;
*qual = G_RAID_VOLUME_RLQ_R5EELS;
} else if (strcasecmp(str, "RAID5R-RA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5R;
*qual = G_RAID_VOLUME_RLQ_R5RRA;
} else if (strcasecmp(str, "RAID5R-RS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5R;
*qual = G_RAID_VOLUME_RLQ_R5RRS;
} else if (strcasecmp(str, "RAID5R") == 0 ||
strcasecmp(str, "RAID5R-LA") == 0) {
*level = G_RAID_VOLUME_RL_RAID5R;
*qual = G_RAID_VOLUME_RLQ_R5RLA;
} else if (strcasecmp(str, "RAID5R-LS") == 0) {
*level = G_RAID_VOLUME_RL_RAID5R;
*qual = G_RAID_VOLUME_RLQ_R5RLS;
} else
return (-1);
return (0);
}
const char *
g_raid_get_diskname(struct g_raid_disk *disk)
{
if (disk->d_consumer == NULL || disk->d_consumer->provider == NULL)
return ("[unknown]");
return (disk->d_consumer->provider->name);
}
void
g_raid_get_disk_info(struct g_raid_disk *disk)
{
struct g_consumer *cp = disk->d_consumer;
int error, len;
/* Read kernel dumping information. */
disk->d_kd.offset = 0;
disk->d_kd.length = OFF_MAX;
len = sizeof(disk->d_kd);
error = g_io_getattr("GEOM::kerneldump", cp, &len, &disk->d_kd);
if (error)
disk->d_kd.di.dumper = NULL;
if (disk->d_kd.di.dumper == NULL)
G_RAID_DEBUG1(2, disk->d_softc,
"Dumping not supported by %s: %d.",
cp->provider->name, error);
/* Read BIO_DELETE support. */
error = g_getattr("GEOM::candelete", cp, &disk->d_candelete);
if (error)
disk->d_candelete = 0;
if (!disk->d_candelete)
G_RAID_DEBUG1(2, disk->d_softc,
"BIO_DELETE not supported by %s: %d.",
cp->provider->name, error);
}
void
g_raid_report_disk_state(struct g_raid_disk *disk)
{
struct g_raid_subdisk *sd;
int len, state;
uint32_t s;
if (disk->d_consumer == NULL)
return;
if (disk->d_state == G_RAID_DISK_S_DISABLED) {
s = G_STATE_ACTIVE; /* XXX */
} else if (disk->d_state == G_RAID_DISK_S_FAILED ||
disk->d_state == G_RAID_DISK_S_STALE_FAILED) {
s = G_STATE_FAILED;
} else {
state = G_RAID_SUBDISK_S_ACTIVE;
TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
if (sd->sd_state < state)
state = sd->sd_state;
}
if (state == G_RAID_SUBDISK_S_FAILED)
s = G_STATE_FAILED;
else if (state == G_RAID_SUBDISK_S_NEW ||
state == G_RAID_SUBDISK_S_REBUILD)
s = G_STATE_REBUILD;
else if (state == G_RAID_SUBDISK_S_STALE ||
state == G_RAID_SUBDISK_S_RESYNC)
s = G_STATE_RESYNC;
else
s = G_STATE_ACTIVE;
}
len = sizeof(s);
g_io_getattr("GEOM::setstate", disk->d_consumer, &len, &s);
G_RAID_DEBUG1(2, disk->d_softc, "Disk %s state reported as %d.",
g_raid_get_diskname(disk), s);
}
void
g_raid_change_disk_state(struct g_raid_disk *disk, int state)
{
G_RAID_DEBUG1(0, disk->d_softc, "Disk %s state changed from %s to %s.",
g_raid_get_diskname(disk),
g_raid_disk_state2str(disk->d_state),
g_raid_disk_state2str(state));
disk->d_state = state;
g_raid_report_disk_state(disk);
}
void
g_raid_change_subdisk_state(struct g_raid_subdisk *sd, int state)
{
G_RAID_DEBUG1(0, sd->sd_softc,
"Subdisk %s:%d-%s state changed from %s to %s.",
sd->sd_volume->v_name, sd->sd_pos,
sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]",
g_raid_subdisk_state2str(sd->sd_state),
g_raid_subdisk_state2str(state));
sd->sd_state = state;
if (sd->sd_disk)
g_raid_report_disk_state(sd->sd_disk);
}
void
g_raid_change_volume_state(struct g_raid_volume *vol, int state)
{
G_RAID_DEBUG1(0, vol->v_softc,
"Volume %s state changed from %s to %s.",
vol->v_name,
g_raid_volume_state2str(vol->v_state),
g_raid_volume_state2str(state));
vol->v_state = state;
}
/*
* --- Events handling functions ---
* Events in geom_raid are used to maintain subdisks and volumes status
* from one thread to simplify locking.
*/
static void
g_raid_event_free(struct g_raid_event *ep)
{
free(ep, M_RAID);
}
int
g_raid_event_send(void *arg, int event, int flags)
{
struct g_raid_softc *sc;
struct g_raid_event *ep;
int error;
if ((flags & G_RAID_EVENT_VOLUME) != 0) {
sc = ((struct g_raid_volume *)arg)->v_softc;
} else if ((flags & G_RAID_EVENT_DISK) != 0) {
sc = ((struct g_raid_disk *)arg)->d_softc;
} else if ((flags & G_RAID_EVENT_SUBDISK) != 0) {
sc = ((struct g_raid_subdisk *)arg)->sd_softc;
} else {
sc = arg;
}
ep = malloc(sizeof(*ep), M_RAID,
sx_xlocked(&sc->sc_lock) ? M_WAITOK : M_NOWAIT);
if (ep == NULL)
return (ENOMEM);
ep->e_tgt = arg;
ep->e_event = event;
ep->e_flags = flags;
ep->e_error = 0;
G_RAID_DEBUG1(4, sc, "Sending event %p. Waking up %p.", ep, sc);
mtx_lock(&sc->sc_queue_mtx);
TAILQ_INSERT_TAIL(&sc->sc_events, ep, e_next);
mtx_unlock(&sc->sc_queue_mtx);
wakeup(sc);
if ((flags & G_RAID_EVENT_WAIT) == 0)
return (0);
sx_assert(&sc->sc_lock, SX_XLOCKED);
G_RAID_DEBUG1(4, sc, "Sleeping on %p.", ep);
sx_xunlock(&sc->sc_lock);
while ((ep->e_flags & G_RAID_EVENT_DONE) == 0) {
mtx_lock(&sc->sc_queue_mtx);
MSLEEP(error, ep, &sc->sc_queue_mtx, PRIBIO | PDROP, "m:event",
hz * 5);
}
error = ep->e_error;
g_raid_event_free(ep);
sx_xlock(&sc->sc_lock);
return (error);
}
static void
g_raid_event_cancel(struct g_raid_softc *sc, void *tgt)
{
struct g_raid_event *ep, *tmpep;
sx_assert(&sc->sc_lock, SX_XLOCKED);
mtx_lock(&sc->sc_queue_mtx);
TAILQ_FOREACH_SAFE(ep, &sc->sc_events, e_next, tmpep) {
if (ep->e_tgt != tgt)
continue;
TAILQ_REMOVE(&sc->sc_events, ep, e_next);
if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0)
g_raid_event_free(ep);
else {
ep->e_error = ECANCELED;
wakeup(ep);
}
}
mtx_unlock(&sc->sc_queue_mtx);
}
static int
g_raid_event_check(struct g_raid_softc *sc, void *tgt)
{
struct g_raid_event *ep;
int res = 0;
sx_assert(&sc->sc_lock, SX_XLOCKED);
mtx_lock(&sc->sc_queue_mtx);
TAILQ_FOREACH(ep, &sc->sc_events, e_next) {
if (ep->e_tgt != tgt)
continue;
res = 1;
break;
}
mtx_unlock(&sc->sc_queue_mtx);
return (res);
}
/*
* Return the number of disks in given state.
* If state is equal to -1, count all connected disks.
*/
u_int
g_raid_ndisks(struct g_raid_softc *sc, int state)
{
struct g_raid_disk *disk;
u_int n;
sx_assert(&sc->sc_lock, SX_LOCKED);
n = 0;
TAILQ_FOREACH(disk, &sc->sc_disks, d_next) {
if (disk->d_state == state || state == -1)
n++;
}
return (n);
}
/*
* Return the number of subdisks in given state.
* If state is equal to -1, count all connected disks.
*/
u_int
g_raid_nsubdisks(struct g_raid_volume *vol, int state)
{
struct g_raid_subdisk *subdisk;
struct g_raid_softc *sc;
u_int i, n ;
sc = vol->v_softc;
sx_assert(&sc->sc_lock, SX_LOCKED);
n = 0;
for (i = 0; i < vol->v_disks_count; i++) {
subdisk = &vol->v_subdisks[i];
if ((state == -1 &&
subdisk->sd_state != G_RAID_SUBDISK_S_NONE) ||
subdisk->sd_state == state)
n++;
}
return (n);
}
/*
* Return the first subdisk in given state.
* If state is equal to -1, then the first connected disks.
*/
struct g_raid_subdisk *
g_raid_get_subdisk(struct g_raid_volume *vol, int state)
{
struct g_raid_subdisk *sd;
struct g_raid_softc *sc;
u_int i;
sc = vol->v_softc;
sx_assert(&sc->sc_lock, SX_LOCKED);
for (i = 0; i < vol->v_disks_count; i++) {
sd = &vol->v_subdisks[i];
if ((state == -1 &&
sd->sd_state != G_RAID_SUBDISK_S_NONE) ||
sd->sd_state == state)
return (sd);
}
return (NULL);
}
struct g_consumer *
g_raid_open_consumer(struct g_raid_softc *sc, const char *name)
{
struct g_consumer *cp;
struct g_provider *pp;
g_topology_assert();
if (strncmp(name, "/dev/", 5) == 0)
name += 5;
pp = g_provider_by_name(name);
if (pp == NULL)
return (NULL);
cp = g_new_consumer(sc->sc_geom);
cp->flags |= G_CF_DIRECT_RECEIVE;
if (g_attach(cp, pp) != 0) {
g_destroy_consumer(cp);
return (NULL);
}
if (g_access(cp, 1, 1, 1) != 0) {
g_detach(cp);
g_destroy_consumer(cp);
return (NULL);
}
return (cp);
}
static u_int
g_raid_nrequests(struct g_raid_softc *sc, struct g_consumer *cp)
{
struct bio *bp;
u_int nreqs = 0;
mtx_lock(&sc->sc_queue_mtx);
TAILQ_FOREACH(bp, &sc->sc_queue.queue, bio_queue) {
if (bp->bio_from == cp)
nreqs++;
}
mtx_unlock(&sc->sc_queue_mtx);
return (nreqs);
}
u_int
g_raid_nopens(struct g_raid_softc *sc)
{
struct g_raid_volume *vol;
u_int opens;
opens = 0;
TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
if (vol->v_provider_open != 0)
opens++;
}
return (opens);
}
static int
g_raid_consumer_is_busy(struct g_raid_softc *sc, struct g_consumer *cp)
{
if (cp->index > 0) {
G_RAID_DEBUG1(2, sc,
"I/O requests for %s exist, can't destroy it now.",
cp->provider->name);
return (1);
}
if (g_raid_nrequests(sc, cp) > 0) {
G_RAID_DEBUG1(2, sc,
"I/O requests for %s in queue, can't destroy it now.",
cp->provider->name);
return (1);
}
return (0);
}
static void
g_raid_destroy_consumer(void *arg, int flags __unused)
{
struct g_consumer *cp;
g_topology_assert();
cp = arg;
G_RAID_DEBUG(1, "Consumer %s destroyed.", cp->provider->name);
g_detach(cp);
g_destroy_consumer(cp);
}
void
g_raid_kill_consumer(struct g_raid_softc *sc, struct g_consumer *cp)
{
struct g_provider *pp;
int retaste_wait;
g_topology_assert_not();
g_topology_lock();
cp->private = NULL;
if (g_raid_consumer_is_busy(sc, cp))
goto out;
pp = cp->provider;
retaste_wait = 0;
if (cp->acw == 1) {
if ((pp->geom->flags & G_GEOM_WITHER) == 0)
retaste_wait = 1;
}
if (cp->acr > 0 || cp->acw > 0 || cp->ace > 0)
g_access(cp, -cp->acr, -cp->acw, -cp->ace);
if (retaste_wait) {
/*
* After retaste event was send (inside g_access()), we can send
* event to detach and destroy consumer.
* A class, which has consumer to the given provider connected
* will not receive retaste event for the provider.
* This is the way how I ignore retaste events when I close
* consumers opened for write: I detach and destroy consumer
* after retaste event is sent.
*/
g_post_event(g_raid_destroy_consumer, cp, M_WAITOK, NULL);
goto out;
}
G_RAID_DEBUG(1, "Consumer %s destroyed.", pp->name);
g_detach(cp);
g_destroy_consumer(cp);
out:
g_topology_unlock();
}
static void
g_raid_orphan(struct g_consumer *cp)
{
struct g_raid_disk *disk;
g_topology_assert();
disk = cp->private;
if (disk == NULL)
return;
g_raid_event_send(disk, G_RAID_DISK_E_DISCONNECTED,
G_RAID_EVENT_DISK);
}
static void
g_raid_clean(struct g_raid_volume *vol, int acw)
{
struct g_raid_softc *sc;
int timeout;
sc = vol->v_softc;
g_topology_assert_not();
sx_assert(&sc->sc_lock, SX_XLOCKED);
// if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0)
// return;
if (!vol->v_dirty)
return;
if (vol->v_writes > 0)
return;
if (acw > 0 || (acw == -1 &&
vol->v_provider != NULL && vol->v_provider->acw > 0)) {
timeout = g_raid_clean_time - (time_uptime - vol->v_last_write);
if (!g_raid_shutdown && timeout > 0)
return;
}
vol->v_dirty = 0;
G_RAID_DEBUG1(1, sc, "Volume %s marked as clean.",
vol->v_name);
g_raid_write_metadata(sc, vol, NULL, NULL);
}
static void
g_raid_dirty(struct g_raid_volume *vol)
{
struct g_raid_softc *sc;
sc = vol->v_softc;
g_topology_assert_not();
sx_assert(&sc->sc_lock, SX_XLOCKED);
// if ((sc->sc_flags & G_RAID_DEVICE_FLAG_NOFAILSYNC) != 0)
// return;
vol->v_dirty = 1;
G_RAID_DEBUG1(1, sc, "Volume %s marked as dirty.",
vol->v_name);
g_raid_write_metadata(sc, vol, NULL, NULL);
}
void
g_raid_tr_flush_common(struct g_raid_tr_object *tr, struct bio *bp)
{
struct g_raid_volume *vol;
struct g_raid_subdisk *sd;
struct bio_queue_head queue;
struct bio *cbp;
int i;
vol = tr->tro_volume;
/*
* Allocate all bios before sending any request, so we can return
* ENOMEM in nice and clean way.
*/
bioq_init(&queue);
for (i = 0; i < vol->v_disks_count; i++) {
sd = &vol->v_subdisks[i];
if (sd->sd_state == G_RAID_SUBDISK_S_NONE ||
sd->sd_state == G_RAID_SUBDISK_S_FAILED)
continue;
cbp = g_clone_bio(bp);
if (cbp == NULL)
goto failure;
cbp->bio_caller1 = sd;
bioq_insert_tail(&queue, cbp);
}
while ((cbp = bioq_takefirst(&queue)) != NULL) {
sd = cbp->bio_caller1;
cbp->bio_caller1 = NULL;
g_raid_subdisk_iostart(sd, cbp);
}
return;
failure:
while ((cbp = bioq_takefirst(&queue)) != NULL)
g_destroy_bio(cbp);
if (bp->bio_error == 0)
bp->bio_error = ENOMEM;
g_raid_iodone(bp, bp->bio_error);
}
static void
g_raid_tr_kerneldump_common_done(struct bio *bp)
{
bp->bio_flags |= BIO_DONE;