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3ab0187add
freebsd-dev/sys/geom/raid/g_raid.c
Alexander Motin 3ab0187add Remove request sorting from GEOM_MIRROR and GEOM_RAID. 
When CPU is not busy, those queues are typically empty.  When CPU is busy,
then one more extra sorting is the last thing it needs.  If specific device
(HDD) really needs sorting, then it will be done later by CAM.

This supposed to fix livelock reported for mirror of two SSDs, when UFS
fires zillion of BIO_DELETE requests, that totally blocks I/O subsystem by
pointless sorting of requests and responses under single mutex lock.

MFC after:	2 weeks
2015-03-27 12:44:28 +00:00

2598 lines
66 KiB
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/*-
* 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.
*/
#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.");
static u_int ar_legacy_aliases = 1;
SYSCTL_INT(_kern_geom_raid, OID_AUTO, legacy_aliases, CTLFLAG_RWTUN,
&ar_legacy_aliases, 0, "Create aliases named as the legacy ataraid style.");
#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_softc *sc;
struct g_raid_volume *vol;
struct g_raid_subdisk *sd;
struct bio_queue_head queue;
struct bio *cbp;
int i;
vol = tr->tro_volume;
sc = vol->v_softc;
/*
* 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;
}
int
g_raid_tr_kerneldump_common(struct g_raid_tr_object *tr,
void *virtual, vm_offset_t physical, off_t offset, size_t length)
{
struct g_raid_softc *sc;
struct g_raid_volume *vol;
struct bio bp;
vol = tr->tro_volume;
sc = vol->v_softc;
bzero(&bp, sizeof(bp));
bp.bio_cmd = BIO_WRITE;
bp.bio_done = g_raid_tr_kerneldump_common_done;
bp.bio_attribute = NULL;
bp.bio_offset = offset;
bp.bio_length = length;
bp.bio_data = virtual;
bp.bio_to = vol->v_provider;
g_raid_start(&bp);
while (!(bp.bio_flags & BIO_DONE)) {
G_RAID_DEBUG1(4, sc, "Poll...");
g_raid_poll(sc);
DELAY(10);
}
return (bp.bio_error != 0 ? EIO : 0);
}
static int
g_raid_dump(void *arg,
void *virtual, vm_offset_t physical, off_t offset, size_t length)
{
struct g_raid_volume *vol;
int error;
vol = (struct g_raid_volume *)arg;
G_RAID_DEBUG1(3, vol->v_softc, "Dumping at off %llu len %llu.",
(long long unsigned)offset, (long long unsigned)length);
error = G_RAID_TR_KERNELDUMP(vol->v_tr,
virtual, physical, offset, length);
return (error);
}
static void
g_raid_kerneldump(struct g_raid_softc *sc, struct bio *bp)
{
struct g_kerneldump *gkd;
struct g_provider *pp;
struct g_raid_volume *vol;
gkd = (struct g_kerneldump*)bp->bio_data;
pp = bp->bio_to;
vol = pp->private;
g_trace(G_T_TOPOLOGY, "g_raid_kerneldump(%s, %jd, %jd)",
pp->name, (intmax_t)gkd->offset, (intmax_t)gkd->length);
gkd->di.dumper = g_raid_dump;
gkd->di.priv = vol;
gkd->di.blocksize = vol->v_sectorsize;
gkd->di.maxiosize = DFLTPHYS;
gkd->di.mediaoffset = gkd->offset;
if ((gkd->offset + gkd->length) > vol->v_mediasize)
gkd->length = vol->v_mediasize - gkd->offset;
gkd->di.mediasize = gkd->length;
g_io_deliver(bp, 0);
}
static void
g_raid_candelete(struct g_raid_softc *sc, struct bio *bp)
{
struct g_provider *pp;
struct g_raid_volume *vol;
struct g_raid_subdisk *sd;
int *val;
int i;
val = (int *)bp->bio_data;
pp = bp->bio_to;
vol = pp->private;
*val = 0;
for (i = 0; i < vol->v_disks_count; i++) {
sd = &vol->v_subdisks[i];
if (sd->sd_state == G_RAID_SUBDISK_S_NONE)
continue;
if (sd->sd_disk->d_candelete) {
*val = 1;
break;
}
}
g_io_deliver(bp, 0);
}
static void
g_raid_start(struct bio *bp)
{
struct g_raid_softc *sc;
sc = bp->bio_to->geom->softc;
/*
* If sc == NULL or there are no valid disks, provider's error
* should be set and g_raid_start() should not be called at all.
*/
// KASSERT(sc != NULL && sc->sc_state == G_RAID_VOLUME_S_RUNNING,
// ("Provider's error should be set (error=%d)(mirror=%s).",
// bp->bio_to->error, bp->bio_to->name));
G_RAID_LOGREQ(3, bp, "Request received.");
switch (bp->bio_cmd) {
case BIO_READ:
case BIO_WRITE:
case BIO_DELETE:
case BIO_FLUSH:
break;
case BIO_GETATTR:
if (!strcmp(bp->bio_attribute, "GEOM::candelete"))
g_raid_candelete(sc, bp);
else if (!strcmp(bp->bio_attribute, "GEOM::kerneldump"))
g_raid_kerneldump(sc, bp);
else
g_io_deliver(bp, EOPNOTSUPP);
return;
default:
g_io_deliver(bp, EOPNOTSUPP);
return;
}
mtx_lock(&sc->sc_queue_mtx);
bioq_insert_tail(&sc->sc_queue, bp);
mtx_unlock(&sc->sc_queue_mtx);
if (!dumping) {
G_RAID_DEBUG1(4, sc, "Waking up %p.", sc);
wakeup(sc);
}
}
static int
g_raid_bio_overlaps(const struct bio *bp, off_t lstart, off_t len)
{
/*
* 5 cases:
* (1) bp entirely below NO
* (2) bp entirely above NO
* (3) bp start below, but end in range YES
* (4) bp entirely within YES
* (5) bp starts within, ends above YES
*
* lock range 10-19 (offset 10 length 10)
* (1) 1-5: first if kicks it out
* (2) 30-35: second if kicks it out
* (3) 5-15: passes both ifs
* (4) 12-14: passes both ifs
* (5) 19-20: passes both
*/
off_t lend = lstart + len - 1;
off_t bstart = bp->bio_offset;
off_t bend = bp->bio_offset + bp->bio_length - 1;
if (bend < lstart)
return (0);
if (lend < bstart)
return (0);
return (1);
}
static int
g_raid_is_in_locked_range(struct g_raid_volume *vol, const struct bio *bp)
{
struct g_raid_lock *lp;
sx_assert(&vol->v_softc->sc_lock, SX_LOCKED);
LIST_FOREACH(lp, &vol->v_locks, l_next) {
if (g_raid_bio_overlaps(bp, lp->l_offset, lp->l_length))
return (1);
}
return (0);
}
static void
g_raid_start_request(struct bio *bp)
{
struct g_raid_softc *sc;
struct g_raid_volume *vol;
sc = bp->bio_to->geom->softc;
sx_assert(&sc->sc_lock, SX_LOCKED);
vol = bp->bio_to->private;
/*
* Check to see if this item is in a locked range. If so,
* queue it to our locked queue and return. We'll requeue
* it when the range is unlocked. Internal I/O for the
* rebuild/rescan/recovery process is excluded from this
* check so we can actually do the recovery.
*/
if (!(bp->bio_cflags & G_RAID_BIO_FLAG_SPECIAL) &&
g_raid_is_in_locked_range(vol, bp)) {
G_RAID_LOGREQ(3, bp, "Defer request.");
bioq_insert_tail(&vol->v_locked, bp);
return;
}
/*
* If we're actually going to do the write/delete, then
* update the idle stats for the volume.
*/
if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) {
if (!vol->v_dirty)
g_raid_dirty(vol);
vol->v_writes++;
}
/*
* Put request onto inflight queue, so we can check if new
* synchronization requests don't collide with it. Then tell
* the transformation layer to start the I/O.
*/
bioq_insert_tail(&vol->v_inflight, bp);
G_RAID_LOGREQ(4, bp, "Request started");
G_RAID_TR_IOSTART(vol->v_tr, bp);
}
static void
g_raid_finish_with_locked_ranges(struct g_raid_volume *vol, struct bio *bp)
{
off_t off, len;
struct bio *nbp;
struct g_raid_lock *lp;
vol->v_pending_lock = 0;
LIST_FOREACH(lp, &vol->v_locks, l_next) {
if (lp->l_pending) {
off = lp->l_offset;
len = lp->l_length;
lp->l_pending = 0;
TAILQ_FOREACH(nbp, &vol->v_inflight.queue, bio_queue) {
if (g_raid_bio_overlaps(nbp, off, len))
lp->l_pending++;
}
if (lp->l_pending) {
vol->v_pending_lock = 1;
G_RAID_DEBUG1(4, vol->v_softc,
"Deferred lock(%jd, %jd) has %d pending",
(intmax_t)off, (intmax_t)(off + len),
lp->l_pending);
continue;
}
G_RAID_DEBUG1(4, vol->v_softc,
"Deferred lock of %jd to %jd completed",
(intmax_t)off, (intmax_t)(off + len));
G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg);
}
}
}
void
g_raid_iodone(struct bio *bp, int error)
{
struct g_raid_softc *sc;
struct g_raid_volume *vol;
sc = bp->bio_to->geom->softc;
sx_assert(&sc->sc_lock, SX_LOCKED);
vol = bp->bio_to->private;
G_RAID_LOGREQ(3, bp, "Request done: %d.", error);
/* Update stats if we done write/delete. */
if (bp->bio_cmd == BIO_WRITE || bp->bio_cmd == BIO_DELETE) {
vol->v_writes--;
vol->v_last_write = time_uptime;
}
bioq_remove(&vol->v_inflight, bp);
if (vol->v_pending_lock && g_raid_is_in_locked_range(vol, bp))
g_raid_finish_with_locked_ranges(vol, bp);
getmicrouptime(&vol->v_last_done);
g_io_deliver(bp, error);
}
int
g_raid_lock_range(struct g_raid_volume *vol, off_t off, off_t len,
struct bio *ignore, void *argp)
{
struct g_raid_softc *sc;
struct g_raid_lock *lp;
struct bio *bp;
sc = vol->v_softc;
lp = malloc(sizeof(*lp), M_RAID, M_WAITOK | M_ZERO);
LIST_INSERT_HEAD(&vol->v_locks, lp, l_next);
lp->l_offset = off;
lp->l_length = len;
lp->l_callback_arg = argp;
lp->l_pending = 0;
TAILQ_FOREACH(bp, &vol->v_inflight.queue, bio_queue) {
if (bp != ignore && g_raid_bio_overlaps(bp, off, len))
lp->l_pending++;
}
/*
* If there are any writes that are pending, we return EBUSY. All
* callers will have to wait until all pending writes clear.
*/
if (lp->l_pending > 0) {
vol->v_pending_lock = 1;
G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd deferred %d pend",
(intmax_t)off, (intmax_t)(off+len), lp->l_pending);
return (EBUSY);
}
G_RAID_DEBUG1(4, sc, "Locking range %jd to %jd",
(intmax_t)off, (intmax_t)(off+len));
G_RAID_TR_LOCKED(vol->v_tr, lp->l_callback_arg);
return (0);
}
int
g_raid_unlock_range(struct g_raid_volume *vol, off_t off, off_t len)
{
struct g_raid_lock *lp;
struct g_raid_softc *sc;
struct bio *bp;
sc = vol->v_softc;
LIST_FOREACH(lp, &vol->v_locks, l_next) {
if (lp->l_offset == off && lp->l_length == len) {
LIST_REMOVE(lp, l_next);
/* XXX
* Right now we just put them all back on the queue
* and hope for the best. We hope this because any
* locked ranges will go right back on this list
* when the worker thread runs.
* XXX
*/
G_RAID_DEBUG1(4, sc, "Unlocked %jd to %jd",
(intmax_t)lp->l_offset,
(intmax_t)(lp->l_offset+lp->l_length));
mtx_lock(&sc->sc_queue_mtx);
while ((bp = bioq_takefirst(&vol->v_locked)) != NULL)
bioq_insert_tail(&sc->sc_queue, bp);
mtx_unlock(&sc->sc_queue_mtx);
free(lp, M_RAID);
return (0);
}
}
return (EINVAL);
}
void
g_raid_subdisk_iostart(struct g_raid_subdisk *sd, struct bio *bp)
{
struct g_consumer *cp;
struct g_raid_disk *disk, *tdisk;
bp->bio_caller1 = sd;
/*
* Make sure that the disk is present. Generally it is a task of
* transformation layers to not send requests to absent disks, but
* it is better to be safe and report situation then sorry.
*/
if (sd->sd_disk == NULL) {
G_RAID_LOGREQ(0, bp, "Warning! I/O request to an absent disk!");
nodisk:
bp->bio_from = NULL;
bp->bio_to = NULL;
bp->bio_error = ENXIO;
g_raid_disk_done(bp);
return;
}
disk = sd->sd_disk;
if (disk->d_state != G_RAID_DISK_S_ACTIVE &&
disk->d_state != G_RAID_DISK_S_FAILED) {
G_RAID_LOGREQ(0, bp, "Warning! I/O request to a disk in a "
"wrong state (%s)!", g_raid_disk_state2str(disk->d_state));
goto nodisk;
}
cp = disk->d_consumer;
bp->bio_from = cp;
bp->bio_to = cp->provider;
cp->index++;
/* Update average disks load. */
TAILQ_FOREACH(tdisk, &sd->sd_softc->sc_disks, d_next) {
if (tdisk->d_consumer == NULL)
tdisk->d_load = 0;
else
tdisk->d_load = (tdisk->d_consumer->index *
G_RAID_SUBDISK_LOAD_SCALE + tdisk->d_load * 7) / 8;
}
disk->d_last_offset = bp->bio_offset + bp->bio_length;
if (dumping) {
G_RAID_LOGREQ(3, bp, "Sending dumping request.");
if (bp->bio_cmd == BIO_WRITE) {
bp->bio_error = g_raid_subdisk_kerneldump(sd,
bp->bio_data, 0, bp->bio_offset, bp->bio_length);
} else
bp->bio_error = EOPNOTSUPP;
g_raid_disk_done(bp);
} else {
bp->bio_done = g_raid_disk_done;
bp->bio_offset += sd->sd_offset;
G_RAID_LOGREQ(3, bp, "Sending request.");
g_io_request(bp, cp);
}
}
int
g_raid_subdisk_kerneldump(struct g_raid_subdisk *sd,
void *virtual, vm_offset_t physical, off_t offset, size_t length)
{
if (sd->sd_disk == NULL)
return (ENXIO);
if (sd->sd_disk->d_kd.di.dumper == NULL)
return (EOPNOTSUPP);
return (dump_write(&sd->sd_disk->d_kd.di,
virtual, physical,
sd->sd_disk->d_kd.di.mediaoffset + sd->sd_offset + offset,
length));
}
static void
g_raid_disk_done(struct bio *bp)
{
struct g_raid_softc *sc;
struct g_raid_subdisk *sd;
sd = bp->bio_caller1;
sc = sd->sd_softc;
mtx_lock(&sc->sc_queue_mtx);
bioq_insert_tail(&sc->sc_queue, bp);
mtx_unlock(&sc->sc_queue_mtx);
if (!dumping)
wakeup(sc);
}
static void
g_raid_disk_done_request(struct bio *bp)
{
struct g_raid_softc *sc;
struct g_raid_disk *disk;
struct g_raid_subdisk *sd;
struct g_raid_volume *vol;
g_topology_assert_not();
G_RAID_LOGREQ(3, bp, "Disk request done: %d.", bp->bio_error);
sd = bp->bio_caller1;
sc = sd->sd_softc;
vol = sd->sd_volume;
if (bp->bio_from != NULL) {
bp->bio_from->index--;
disk = bp->bio_from->private;
if (disk == NULL)
g_raid_kill_consumer(sc, bp->bio_from);
}
bp->bio_offset -= sd->sd_offset;
G_RAID_TR_IODONE(vol->v_tr, sd, bp);
}
static void
g_raid_handle_event(struct g_raid_softc *sc, struct g_raid_event *ep)
{
if ((ep->e_flags & G_RAID_EVENT_VOLUME) != 0)
ep->e_error = g_raid_update_volume(ep->e_tgt, ep->e_event);
else if ((ep->e_flags & G_RAID_EVENT_DISK) != 0)
ep->e_error = g_raid_update_disk(ep->e_tgt, ep->e_event);
else if ((ep->e_flags & G_RAID_EVENT_SUBDISK) != 0)
ep->e_error = g_raid_update_subdisk(ep->e_tgt, ep->e_event);
else
ep->e_error = g_raid_update_node(ep->e_tgt, ep->e_event);
if ((ep->e_flags & G_RAID_EVENT_WAIT) == 0) {
KASSERT(ep->e_error == 0,
("Error cannot be handled."));
g_raid_event_free(ep);
} else {
ep->e_flags |= G_RAID_EVENT_DONE;
G_RAID_DEBUG1(4, sc, "Waking up %p.", ep);
mtx_lock(&sc->sc_queue_mtx);
wakeup(ep);
mtx_unlock(&sc->sc_queue_mtx);
}
}
/*
* Worker thread.
*/
static void
g_raid_worker(void *arg)
{
struct g_raid_softc *sc;
struct g_raid_event *ep;
struct g_raid_volume *vol;
struct bio *bp;
struct timeval now, t;
int timeout, rv;
sc = arg;
thread_lock(curthread);
sched_prio(curthread, PRIBIO);
thread_unlock(curthread);
sx_xlock(&sc->sc_lock);
for (;;) {
mtx_lock(&sc->sc_queue_mtx);
/*
* First take a look at events.
* This is important to handle events before any I/O requests.
*/
bp = NULL;
vol = NULL;
rv = 0;
ep = TAILQ_FIRST(&sc->sc_events);
if (ep != NULL)
TAILQ_REMOVE(&sc->sc_events, ep, e_next);
else if ((bp = bioq_takefirst(&sc->sc_queue)) != NULL)
;
else {
getmicrouptime(&now);
t = now;
TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
if (bioq_first(&vol->v_inflight) == NULL &&
vol->v_tr &&
timevalcmp(&vol->v_last_done, &t, < ))
t = vol->v_last_done;
}
timevalsub(&t, &now);
timeout = g_raid_idle_threshold +
t.tv_sec * 1000000 + t.tv_usec;
if (timeout > 0) {
/*
* Two steps to avoid overflows at HZ=1000
* and idle timeouts > 2.1s. Some rounding
* errors can occur, but they are < 1tick,
* which is deemed to be close enough for
* this purpose.
*/
int micpertic = 1000000 / hz;
timeout = (timeout + micpertic - 1) / micpertic;
sx_xunlock(&sc->sc_lock);
MSLEEP(rv, sc, &sc->sc_queue_mtx,
PRIBIO | PDROP, "-", timeout);
sx_xlock(&sc->sc_lock);
goto process;
} else
rv = EWOULDBLOCK;
}
mtx_unlock(&sc->sc_queue_mtx);
process:
if (ep != NULL) {
g_raid_handle_event(sc, ep);
} else if (bp != NULL) {
if (bp->bio_to != NULL &&
bp->bio_to->geom == sc->sc_geom)
g_raid_start_request(bp);
else
g_raid_disk_done_request(bp);
} else if (rv == EWOULDBLOCK) {
TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
g_raid_clean(vol, -1);
if (bioq_first(&vol->v_inflight) == NULL &&
vol->v_tr) {
t.tv_sec = g_raid_idle_threshold / 1000000;
t.tv_usec = g_raid_idle_threshold % 1000000;
timevaladd(&t, &vol->v_last_done);
getmicrouptime(&now);
if (timevalcmp(&t, &now, <= )) {
G_RAID_TR_IDLE(vol->v_tr);
vol->v_last_done = now;
}
}
}
}
if (sc->sc_stopping == G_RAID_DESTROY_HARD)
g_raid_destroy_node(sc, 1); /* May not return. */
}
}
static void
g_raid_poll(struct g_raid_softc *sc)
{
struct g_raid_event *ep;
struct bio *bp;
sx_xlock(&sc->sc_lock);
mtx_lock(&sc->sc_queue_mtx);
/*
* First take a look at events.
* This is important to handle events before any I/O requests.
*/
ep = TAILQ_FIRST(&sc->sc_events);
if (ep != NULL) {
TAILQ_REMOVE(&sc->sc_events, ep, e_next);
mtx_unlock(&sc->sc_queue_mtx);
g_raid_handle_event(sc, ep);
goto out;
}
bp = bioq_takefirst(&sc->sc_queue);
if (bp != NULL) {
mtx_unlock(&sc->sc_queue_mtx);
if (bp->bio_from == NULL ||
bp->bio_from->geom != sc->sc_geom)
g_raid_start_request(bp);
else
g_raid_disk_done_request(bp);
}
out:
sx_xunlock(&sc->sc_lock);
}
static void
g_raid_launch_provider(struct g_raid_volume *vol)
{
struct g_raid_disk *disk;
struct g_raid_subdisk *sd;
struct g_raid_softc *sc;
struct g_provider *pp;
char name[G_RAID_MAX_VOLUMENAME];
char announce_buf[80], buf1[32];
off_t off;
int i;
sc = vol->v_softc;
sx_assert(&sc->sc_lock, SX_LOCKED);
g_topology_lock();
/* Try to name provider with volume name. */
snprintf(name, sizeof(name), "raid/%s", vol->v_name);
if (g_raid_name_format == 0 || vol->v_name[0] == 0 ||
g_provider_by_name(name) != NULL) {
/* Otherwise use sequential volume number. */
snprintf(name, sizeof(name), "raid/r%d", vol->v_global_id);
}
/*
* Create a /dev/ar%d that the old ataraid(4) stack once
* created as an alias for /dev/raid/r%d if requested.
* This helps going from stable/7 ataraid devices to newer
* FreeBSD releases. sbruno 07 MAY 2013
*/
if (ar_legacy_aliases) {
snprintf(announce_buf, sizeof(announce_buf),
"kern.devalias.%s", name);
snprintf(buf1, sizeof(buf1),
"ar%d", vol->v_global_id);
kern_setenv(announce_buf, buf1);
}
pp = g_new_providerf(sc->sc_geom, "%s", name);
pp->flags |= G_PF_DIRECT_RECEIVE;
if (vol->v_tr->tro_class->trc_accept_unmapped) {
pp->flags |= G_PF_ACCEPT_UNMAPPED;
for (i = 0; i < vol->v_disks_count; i++) {
sd = &vol->v_subdisks[i];
if (sd->sd_state == G_RAID_SUBDISK_S_NONE)
continue;
if ((sd->sd_disk->d_consumer->provider->flags &
G_PF_ACCEPT_UNMAPPED) == 0)
pp->flags &= ~G_PF_ACCEPT_UNMAPPED;
}
}
pp->private = vol;
pp->mediasize = vol->v_mediasize;
pp->sectorsize = vol->v_sectorsize;
pp->stripesize = 0;
pp->stripeoffset = 0;
if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID1 ||
vol->v_raid_level == G_RAID_VOLUME_RL_RAID3 ||
vol->v_raid_level == G_RAID_VOLUME_RL_SINGLE ||
vol->v_raid_level == G_RAID_VOLUME_RL_CONCAT) {
if ((disk = vol->v_subdisks[0].sd_disk) != NULL &&
disk->d_consumer != NULL &&
disk->d_consumer->provider != NULL) {
pp->stripesize = disk->d_consumer->provider->stripesize;
off = disk->d_consumer->provider->stripeoffset;
pp->stripeoffset = off + vol->v_subdisks[0].sd_offset;
if (off > 0)
pp->stripeoffset %= off;
}
if (vol->v_raid_level == G_RAID_VOLUME_RL_RAID3) {
pp->stripesize *= (vol->v_disks_count - 1);
pp->stripeoffset *= (vol->v_disks_count - 1);
}
} else
pp->stripesize = vol->v_strip_size;
vol->v_provider = pp;
g_error_provider(pp, 0);
g_topology_unlock();
G_RAID_DEBUG1(0, sc, "Provider %s for volume %s created.",
pp->name, vol->v_name);
}
static void
g_raid_destroy_provider(struct g_raid_volume *vol)
{
struct g_raid_softc *sc;
struct g_provider *pp;
struct bio *bp, *tmp;
g_topology_assert_not();
sc = vol->v_softc;
pp = vol->v_provider;
KASSERT(pp != NULL, ("NULL provider (volume=%s).", vol->v_name));
g_topology_lock();
g_error_provider(pp, ENXIO);
mtx_lock(&sc->sc_queue_mtx);
TAILQ_FOREACH_SAFE(bp, &sc->sc_queue.queue, bio_queue, tmp) {
if (bp->bio_to != pp)
continue;
bioq_remove(&sc->sc_queue, bp);
g_io_deliver(bp, ENXIO);
}
mtx_unlock(&sc->sc_queue_mtx);
G_RAID_DEBUG1(0, sc, "Provider %s for volume %s destroyed.",
pp->name, vol->v_name);
g_wither_provider(pp, ENXIO);
g_topology_unlock();
vol->v_provider = NULL;
}
/*
* Update device state.
*/
static int
g_raid_update_volume(struct g_raid_volume *vol, u_int event)
{
struct g_raid_softc *sc;
sc = vol->v_softc;
sx_assert(&sc->sc_lock, SX_XLOCKED);
G_RAID_DEBUG1(2, sc, "Event %s for volume %s.",
g_raid_volume_event2str(event),
vol->v_name);
switch (event) {
case G_RAID_VOLUME_E_DOWN:
if (vol->v_provider != NULL)
g_raid_destroy_provider(vol);
break;
case G_RAID_VOLUME_E_UP:
if (vol->v_provider == NULL)
g_raid_launch_provider(vol);
break;
case G_RAID_VOLUME_E_START:
if (vol->v_tr)
G_RAID_TR_START(vol->v_tr);
return (0);
default:
if (sc->sc_md)
G_RAID_MD_VOLUME_EVENT(sc->sc_md, vol, event);
return (0);
}
/* Manage root mount release. */
if (vol->v_starting) {
vol->v_starting = 0;
G_RAID_DEBUG1(1, sc, "root_mount_rel %p", vol->v_rootmount);
root_mount_rel(vol->v_rootmount);
vol->v_rootmount = NULL;
}
if (vol->v_stopping && vol->v_provider_open == 0)
g_raid_destroy_volume(vol);
return (0);
}
/*
* Update subdisk state.
*/
static int
g_raid_update_subdisk(struct g_raid_subdisk *sd, u_int event)
{
struct g_raid_softc *sc;
struct g_raid_volume *vol;
sc = sd->sd_softc;
vol = sd->sd_volume;
sx_assert(&sc->sc_lock, SX_XLOCKED);
G_RAID_DEBUG1(2, sc, "Event %s for subdisk %s:%d-%s.",
g_raid_subdisk_event2str(event),
vol->v_name, sd->sd_pos,
sd->sd_disk ? g_raid_get_diskname(sd->sd_disk) : "[none]");
if (vol->v_tr)
G_RAID_TR_EVENT(vol->v_tr, sd, event);
return (0);
}
/*
* Update disk state.
*/
static int
g_raid_update_disk(struct g_raid_disk *disk, u_int event)
{
struct g_raid_softc *sc;
sc = disk->d_softc;
sx_assert(&sc->sc_lock, SX_XLOCKED);
G_RAID_DEBUG1(2, sc, "Event %s for disk %s.",
g_raid_disk_event2str(event),
g_raid_get_diskname(disk));
if (sc->sc_md)
G_RAID_MD_EVENT(sc->sc_md, disk, event);
return (0);
}
/*
* Node event.
*/
static int
g_raid_update_node(struct g_raid_softc *sc, u_int event)
{
sx_assert(&sc->sc_lock, SX_XLOCKED);
G_RAID_DEBUG1(2, sc, "Event %s for the array.",
g_raid_node_event2str(event));
if (event == G_RAID_NODE_E_WAKE)
return (0);
if (sc->sc_md)
G_RAID_MD_EVENT(sc->sc_md, NULL, event);
return (0);
}
static int
g_raid_access(struct g_provider *pp, int acr, int acw, int ace)
{
struct g_raid_volume *vol;
struct g_raid_softc *sc;
int dcw, opens, error = 0;
g_topology_assert();
sc = pp->geom->softc;
vol = pp->private;
KASSERT(sc != NULL, ("NULL softc (provider=%s).", pp->name));
KASSERT(vol != NULL, ("NULL volume (provider=%s).", pp->name));
G_RAID_DEBUG1(2, sc, "Access request for %s: r%dw%de%d.", pp->name,
acr, acw, ace);
dcw = pp->acw + acw;
g_topology_unlock();
sx_xlock(&sc->sc_lock);
/* Deny new opens while dying. */
if (sc->sc_stopping != 0 && (acr > 0 || acw > 0 || ace > 0)) {
error = ENXIO;
goto out;
}
/* Deny write opens for read-only volumes. */
if (vol->v_read_only && acw > 0) {
error = EROFS;
goto out;
}
if (dcw == 0)
g_raid_clean(vol, dcw);
vol->v_provider_open += acr + acw + ace;
/* Handle delayed node destruction. */
if (sc->sc_stopping == G_RAID_DESTROY_DELAYED &&
vol->v_provider_open == 0) {
/* Count open volumes. */
opens = g_raid_nopens(sc);
if (opens == 0) {
sc->sc_stopping = G_RAID_DESTROY_HARD;
/* Wake up worker to make it selfdestruct. */
g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
}
}
/* Handle open volume destruction. */
if (vol->v_stopping && vol->v_provider_open == 0)
g_raid_destroy_volume(vol);
out:
sx_xunlock(&sc->sc_lock);
g_topology_lock();
return (error);
}
struct g_raid_softc *
g_raid_create_node(struct g_class *mp,
const char *name, struct g_raid_md_object *md)
{
struct g_raid_softc *sc;
struct g_geom *gp;
int error;
g_topology_assert();
G_RAID_DEBUG(1, "Creating array %s.", name);
gp = g_new_geomf(mp, "%s", name);
sc = malloc(sizeof(*sc), M_RAID, M_WAITOK | M_ZERO);
gp->start = g_raid_start;
gp->orphan = g_raid_orphan;
gp->access = g_raid_access;
gp->dumpconf = g_raid_dumpconf;
sc->sc_md = md;
sc->sc_geom = gp;
sc->sc_flags = 0;
TAILQ_INIT(&sc->sc_volumes);
TAILQ_INIT(&sc->sc_disks);
sx_init(&sc->sc_lock, "graid:lock");
mtx_init(&sc->sc_queue_mtx, "graid:queue", NULL, MTX_DEF);
TAILQ_INIT(&sc->sc_events);
bioq_init(&sc->sc_queue);
gp->softc = sc;
error = kproc_create(g_raid_worker, sc, &sc->sc_worker, 0, 0,
"g_raid %s", name);
if (error != 0) {
G_RAID_DEBUG(0, "Cannot create kernel thread for %s.", name);
mtx_destroy(&sc->sc_queue_mtx);
sx_destroy(&sc->sc_lock);
g_destroy_geom(sc->sc_geom);
free(sc, M_RAID);
return (NULL);
}
G_RAID_DEBUG1(0, sc, "Array %s created.", name);
return (sc);
}
struct g_raid_volume *
g_raid_create_volume(struct g_raid_softc *sc, const char *name, int id)
{
struct g_raid_volume *vol, *vol1;
int i;
G_RAID_DEBUG1(1, sc, "Creating volume %s.", name);
vol = malloc(sizeof(*vol), M_RAID, M_WAITOK | M_ZERO);
vol->v_softc = sc;
strlcpy(vol->v_name, name, G_RAID_MAX_VOLUMENAME);
vol->v_state = G_RAID_VOLUME_S_STARTING;
vol->v_raid_level = G_RAID_VOLUME_RL_UNKNOWN;
vol->v_raid_level_qualifier = G_RAID_VOLUME_RLQ_UNKNOWN;
vol->v_rotate_parity = 1;
bioq_init(&vol->v_inflight);
bioq_init(&vol->v_locked);
LIST_INIT(&vol->v_locks);
for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) {
vol->v_subdisks[i].sd_softc = sc;
vol->v_subdisks[i].sd_volume = vol;
vol->v_subdisks[i].sd_pos = i;
vol->v_subdisks[i].sd_state = G_RAID_DISK_S_NONE;
}
/* Find free ID for this volume. */
g_topology_lock();
vol1 = vol;
if (id >= 0) {
LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) {
if (vol1->v_global_id == id)
break;
}
}
if (vol1 != NULL) {
for (id = 0; ; id++) {
LIST_FOREACH(vol1, &g_raid_volumes, v_global_next) {
if (vol1->v_global_id == id)
break;
}
if (vol1 == NULL)
break;
}
}
vol->v_global_id = id;
LIST_INSERT_HEAD(&g_raid_volumes, vol, v_global_next);
g_topology_unlock();
/* Delay root mounting. */
vol->v_rootmount = root_mount_hold("GRAID");
G_RAID_DEBUG1(1, sc, "root_mount_hold %p", vol->v_rootmount);
vol->v_starting = 1;
TAILQ_INSERT_TAIL(&sc->sc_volumes, vol, v_next);
return (vol);
}
struct g_raid_disk *
g_raid_create_disk(struct g_raid_softc *sc)
{
struct g_raid_disk *disk;
G_RAID_DEBUG1(1, sc, "Creating disk.");
disk = malloc(sizeof(*disk), M_RAID, M_WAITOK | M_ZERO);
disk->d_softc = sc;
disk->d_state = G_RAID_DISK_S_NONE;
TAILQ_INIT(&disk->d_subdisks);
TAILQ_INSERT_TAIL(&sc->sc_disks, disk, d_next);
return (disk);
}
int g_raid_start_volume(struct g_raid_volume *vol)
{
struct g_raid_tr_class *class;
struct g_raid_tr_object *obj;
int status;
G_RAID_DEBUG1(2, vol->v_softc, "Starting volume %s.", vol->v_name);
LIST_FOREACH(class, &g_raid_tr_classes, trc_list) {
if (!class->trc_enable)
continue;
G_RAID_DEBUG1(2, vol->v_softc,
"Tasting volume %s for %s transformation.",
vol->v_name, class->name);
obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
M_WAITOK);
obj->tro_class = class;
obj->tro_volume = vol;
status = G_RAID_TR_TASTE(obj, vol);
if (status != G_RAID_TR_TASTE_FAIL)
break;
kobj_delete((kobj_t)obj, M_RAID);
}
if (class == NULL) {
G_RAID_DEBUG1(0, vol->v_softc,
"No transformation module found for %s.",
vol->v_name);
vol->v_tr = NULL;
g_raid_change_volume_state(vol, G_RAID_VOLUME_S_UNSUPPORTED);
g_raid_event_send(vol, G_RAID_VOLUME_E_DOWN,
G_RAID_EVENT_VOLUME);
return (-1);
}
G_RAID_DEBUG1(2, vol->v_softc,
"Transformation module %s chosen for %s.",
class->name, vol->v_name);
vol->v_tr = obj;
return (0);
}
int
g_raid_destroy_node(struct g_raid_softc *sc, int worker)
{
struct g_raid_volume *vol, *tmpv;
struct g_raid_disk *disk, *tmpd;
int error = 0;
sc->sc_stopping = G_RAID_DESTROY_HARD;
TAILQ_FOREACH_SAFE(vol, &sc->sc_volumes, v_next, tmpv) {
if (g_raid_destroy_volume(vol))
error = EBUSY;
}
if (error)
return (error);
TAILQ_FOREACH_SAFE(disk, &sc->sc_disks, d_next, tmpd) {
if (g_raid_destroy_disk(disk))
error = EBUSY;
}
if (error)
return (error);
if (sc->sc_md) {
G_RAID_MD_FREE(sc->sc_md);
kobj_delete((kobj_t)sc->sc_md, M_RAID);
sc->sc_md = NULL;
}
if (sc->sc_geom != NULL) {
G_RAID_DEBUG1(0, sc, "Array %s destroyed.", sc->sc_name);
g_topology_lock();
sc->sc_geom->softc = NULL;
g_wither_geom(sc->sc_geom, ENXIO);
g_topology_unlock();
sc->sc_geom = NULL;
} else
G_RAID_DEBUG(1, "Array destroyed.");
if (worker) {
g_raid_event_cancel(sc, sc);
mtx_destroy(&sc->sc_queue_mtx);
sx_xunlock(&sc->sc_lock);
sx_destroy(&sc->sc_lock);
wakeup(&sc->sc_stopping);
free(sc, M_RAID);
curthread->td_pflags &= ~TDP_GEOM;
G_RAID_DEBUG(1, "Thread exiting.");
kproc_exit(0);
} else {
/* Wake up worker to make it selfdestruct. */
g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
}
return (0);
}
int
g_raid_destroy_volume(struct g_raid_volume *vol)
{
struct g_raid_softc *sc;
struct g_raid_disk *disk;
int i;
sc = vol->v_softc;
G_RAID_DEBUG1(2, sc, "Destroying volume %s.", vol->v_name);
vol->v_stopping = 1;
if (vol->v_state != G_RAID_VOLUME_S_STOPPED) {
if (vol->v_tr) {
G_RAID_TR_STOP(vol->v_tr);
return (EBUSY);
} else
vol->v_state = G_RAID_VOLUME_S_STOPPED;
}
if (g_raid_event_check(sc, vol) != 0)
return (EBUSY);
if (vol->v_provider != NULL)
return (EBUSY);
if (vol->v_provider_open != 0)
return (EBUSY);
if (vol->v_tr) {
G_RAID_TR_FREE(vol->v_tr);
kobj_delete((kobj_t)vol->v_tr, M_RAID);
vol->v_tr = NULL;
}
if (vol->v_rootmount)
root_mount_rel(vol->v_rootmount);
g_topology_lock();
LIST_REMOVE(vol, v_global_next);
g_topology_unlock();
TAILQ_REMOVE(&sc->sc_volumes, vol, v_next);
for (i = 0; i < G_RAID_MAX_SUBDISKS; i++) {
g_raid_event_cancel(sc, &vol->v_subdisks[i]);
disk = vol->v_subdisks[i].sd_disk;
if (disk == NULL)
continue;
TAILQ_REMOVE(&disk->d_subdisks, &vol->v_subdisks[i], sd_next);
}
G_RAID_DEBUG1(2, sc, "Volume %s destroyed.", vol->v_name);
if (sc->sc_md)
G_RAID_MD_FREE_VOLUME(sc->sc_md, vol);
g_raid_event_cancel(sc, vol);
free(vol, M_RAID);
if (sc->sc_stopping == G_RAID_DESTROY_HARD) {
/* Wake up worker to let it selfdestruct. */
g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
}
return (0);
}
int
g_raid_destroy_disk(struct g_raid_disk *disk)
{
struct g_raid_softc *sc;
struct g_raid_subdisk *sd, *tmp;
sc = disk->d_softc;
G_RAID_DEBUG1(2, sc, "Destroying disk.");
if (disk->d_consumer) {
g_raid_kill_consumer(sc, disk->d_consumer);
disk->d_consumer = NULL;
}
TAILQ_FOREACH_SAFE(sd, &disk->d_subdisks, sd_next, tmp) {
g_raid_change_subdisk_state(sd, G_RAID_SUBDISK_S_NONE);
g_raid_event_send(sd, G_RAID_SUBDISK_E_DISCONNECTED,
G_RAID_EVENT_SUBDISK);
TAILQ_REMOVE(&disk->d_subdisks, sd, sd_next);
sd->sd_disk = NULL;
}
TAILQ_REMOVE(&sc->sc_disks, disk, d_next);
if (sc->sc_md)
G_RAID_MD_FREE_DISK(sc->sc_md, disk);
g_raid_event_cancel(sc, disk);
free(disk, M_RAID);
return (0);
}
int
g_raid_destroy(struct g_raid_softc *sc, int how)
{
int error, opens;
g_topology_assert_not();
if (sc == NULL)
return (ENXIO);
sx_assert(&sc->sc_lock, SX_XLOCKED);
/* Count open volumes. */
opens = g_raid_nopens(sc);
/* React on some opened volumes. */
if (opens > 0) {
switch (how) {
case G_RAID_DESTROY_SOFT:
G_RAID_DEBUG1(1, sc,
"%d volumes are still open.",
opens);
sx_xunlock(&sc->sc_lock);
return (EBUSY);
case G_RAID_DESTROY_DELAYED:
G_RAID_DEBUG1(1, sc,
"Array will be destroyed on last close.");
sc->sc_stopping = G_RAID_DESTROY_DELAYED;
sx_xunlock(&sc->sc_lock);
return (EBUSY);
case G_RAID_DESTROY_HARD:
G_RAID_DEBUG1(1, sc,
"%d volumes are still open.",
opens);
}
}
/* Mark node for destruction. */
sc->sc_stopping = G_RAID_DESTROY_HARD;
/* Wake up worker to let it selfdestruct. */
g_raid_event_send(sc, G_RAID_NODE_E_WAKE, 0);
/* Sleep until node destroyed. */
error = sx_sleep(&sc->sc_stopping, &sc->sc_lock,
PRIBIO | PDROP, "r:destroy", hz * 3);
return (error == EWOULDBLOCK ? EBUSY : 0);
}
static void
g_raid_taste_orphan(struct g_consumer *cp)
{
KASSERT(1 == 0, ("%s called while tasting %s.", __func__,
cp->provider->name));
}
static struct g_geom *
g_raid_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
{
struct g_consumer *cp;
struct g_geom *gp, *geom;
struct g_raid_md_class *class;
struct g_raid_md_object *obj;
int status;
g_topology_assert();
g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
if (!g_raid_enable)
return (NULL);
G_RAID_DEBUG(2, "Tasting provider %s.", pp->name);
geom = NULL;
status = G_RAID_MD_TASTE_FAIL;
gp = g_new_geomf(mp, "raid:taste");
/*
* This orphan function should be never called.
*/
gp->orphan = g_raid_taste_orphan;
cp = g_new_consumer(gp);
cp->flags |= G_CF_DIRECT_RECEIVE;
g_attach(cp, pp);
if (g_access(cp, 1, 0, 0) != 0)
goto ofail;
LIST_FOREACH(class, &g_raid_md_classes, mdc_list) {
if (!class->mdc_enable)
continue;
G_RAID_DEBUG(2, "Tasting provider %s for %s metadata.",
pp->name, class->name);
obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
M_WAITOK);
obj->mdo_class = class;
status = G_RAID_MD_TASTE(obj, mp, cp, &geom);
if (status != G_RAID_MD_TASTE_NEW)
kobj_delete((kobj_t)obj, M_RAID);
if (status != G_RAID_MD_TASTE_FAIL)
break;
}
if (status == G_RAID_MD_TASTE_FAIL)
(void)g_access(cp, -1, 0, 0);
ofail:
g_detach(cp);
g_destroy_consumer(cp);
g_destroy_geom(gp);
G_RAID_DEBUG(2, "Tasting provider %s done.", pp->name);
return (geom);
}
int
g_raid_create_node_format(const char *format, struct gctl_req *req,
struct g_geom **gp)
{
struct g_raid_md_class *class;
struct g_raid_md_object *obj;
int status;
G_RAID_DEBUG(2, "Creating array for %s metadata.", format);
LIST_FOREACH(class, &g_raid_md_classes, mdc_list) {
if (strcasecmp(class->name, format) == 0)
break;
}
if (class == NULL) {
G_RAID_DEBUG(1, "No support for %s metadata.", format);
return (G_RAID_MD_TASTE_FAIL);
}
obj = (void *)kobj_create((kobj_class_t)class, M_RAID,
M_WAITOK);
obj->mdo_class = class;
status = G_RAID_MD_CREATE_REQ(obj, &g_raid_class, req, gp);
if (status != G_RAID_MD_TASTE_NEW)
kobj_delete((kobj_t)obj, M_RAID);
return (status);
}
static int
g_raid_destroy_geom(struct gctl_req *req __unused,
struct g_class *mp __unused, struct g_geom *gp)
{
struct g_raid_softc *sc;
int error;
g_topology_unlock();
sc = gp->softc;
sx_xlock(&sc->sc_lock);
g_cancel_event(sc);
error = g_raid_destroy(gp->softc, G_RAID_DESTROY_SOFT);
g_topology_lock();
return (error);
}
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)
{
if (sc->sc_stopping == G_RAID_DESTROY_HARD)
return;
if (sc->sc_md)
G_RAID_MD_WRITE(sc->sc_md, vol, sd, disk);
}
void g_raid_fail_disk(struct g_raid_softc *sc,
struct g_raid_subdisk *sd, struct g_raid_disk *disk)
{
if (disk == NULL)
disk = sd->sd_disk;
if (disk == NULL) {
G_RAID_DEBUG1(0, sc, "Warning! Fail request to an absent disk!");
return;
}
if (disk->d_state != G_RAID_DISK_S_ACTIVE) {
G_RAID_DEBUG1(0, sc, "Warning! Fail request to a disk in a "
"wrong state (%s)!", g_raid_disk_state2str(disk->d_state));
return;
}
if (sc->sc_md)
G_RAID_MD_FAIL_DISK(sc->sc_md, sd, disk);
}
static void
g_raid_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp,
struct g_consumer *cp, struct g_provider *pp)
{
struct g_raid_softc *sc;
struct g_raid_volume *vol;
struct g_raid_subdisk *sd;
struct g_raid_disk *disk;
int i, s;
g_topology_assert();
sc = gp->softc;
if (sc == NULL)
return;
if (pp != NULL) {
vol = pp->private;
g_topology_unlock();
sx_xlock(&sc->sc_lock);
sbuf_printf(sb, "%s<descr>%s %s volume</descr>\n", indent,
sc->sc_md->mdo_class->name,
g_raid_volume_level2str(vol->v_raid_level,
vol->v_raid_level_qualifier));
sbuf_printf(sb, "%s<Label>%s</Label>\n", indent,
vol->v_name);
sbuf_printf(sb, "%s<RAIDLevel>%s</RAIDLevel>\n", indent,
g_raid_volume_level2str(vol->v_raid_level,
vol->v_raid_level_qualifier));
sbuf_printf(sb,
"%s<Transformation>%s</Transformation>\n", indent,
vol->v_tr ? vol->v_tr->tro_class->name : "NONE");
sbuf_printf(sb, "%s<Components>%u</Components>\n", indent,
vol->v_disks_count);
sbuf_printf(sb, "%s<Strip>%u</Strip>\n", indent,
vol->v_strip_size);
sbuf_printf(sb, "%s<State>%s</State>\n", indent,
g_raid_volume_state2str(vol->v_state));
sbuf_printf(sb, "%s<Dirty>%s</Dirty>\n", indent,
vol->v_dirty ? "Yes" : "No");
sbuf_printf(sb, "%s<Subdisks>", indent);
for (i = 0; i < vol->v_disks_count; i++) {
sd = &vol->v_subdisks[i];
if (sd->sd_disk != NULL &&
sd->sd_disk->d_consumer != NULL) {
sbuf_printf(sb, "%s ",
g_raid_get_diskname(sd->sd_disk));
} else {
sbuf_printf(sb, "NONE ");
}
sbuf_printf(sb, "(%s",
g_raid_subdisk_state2str(sd->sd_state));
if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
sd->sd_state == G_RAID_SUBDISK_S_RESYNC) {
sbuf_printf(sb, " %d%%",
(int)(sd->sd_rebuild_pos * 100 /
sd->sd_size));
}
sbuf_printf(sb, ")");
if (i + 1 < vol->v_disks_count)
sbuf_printf(sb, ", ");
}
sbuf_printf(sb, "</Subdisks>\n");
sx_xunlock(&sc->sc_lock);
g_topology_lock();
} else if (cp != NULL) {
disk = cp->private;
if (disk == NULL)
return;
g_topology_unlock();
sx_xlock(&sc->sc_lock);
sbuf_printf(sb, "%s<State>%s", indent,
g_raid_disk_state2str(disk->d_state));
if (!TAILQ_EMPTY(&disk->d_subdisks)) {
sbuf_printf(sb, " (");
TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
sbuf_printf(sb, "%s",
g_raid_subdisk_state2str(sd->sd_state));
if (sd->sd_state == G_RAID_SUBDISK_S_REBUILD ||
sd->sd_state == G_RAID_SUBDISK_S_RESYNC) {
sbuf_printf(sb, " %d%%",
(int)(sd->sd_rebuild_pos * 100 /
sd->sd_size));
}
if (TAILQ_NEXT(sd, sd_next))
sbuf_printf(sb, ", ");
}
sbuf_printf(sb, ")");
}
sbuf_printf(sb, "</State>\n");
sbuf_printf(sb, "%s<Subdisks>", indent);
TAILQ_FOREACH(sd, &disk->d_subdisks, sd_next) {
sbuf_printf(sb, "r%d(%s):%d@%ju",
sd->sd_volume->v_global_id,
sd->sd_volume->v_name,
sd->sd_pos, sd->sd_offset);
if (TAILQ_NEXT(sd, sd_next))
sbuf_printf(sb, ", ");
}
sbuf_printf(sb, "</Subdisks>\n");
sbuf_printf(sb, "%s<ReadErrors>%d</ReadErrors>\n", indent,
disk->d_read_errs);
sx_xunlock(&sc->sc_lock);
g_topology_lock();
} else {
g_topology_unlock();
sx_xlock(&sc->sc_lock);
if (sc->sc_md) {
sbuf_printf(sb, "%s<Metadata>%s</Metadata>\n", indent,
sc->sc_md->mdo_class->name);
}
if (!TAILQ_EMPTY(&sc->sc_volumes)) {
s = 0xff;
TAILQ_FOREACH(vol, &sc->sc_volumes, v_next) {
if (vol->v_state < s)
s = vol->v_state;
}
sbuf_printf(sb, "%s<State>%s</State>\n", indent,
g_raid_volume_state2str(s));
}
sx_xunlock(&sc->sc_lock);
g_topology_lock();
}
}
static void
g_raid_shutdown_post_sync(void *arg, int howto)
{
struct g_class *mp;
struct g_geom *gp, *gp2;
struct g_raid_softc *sc;
struct g_raid_volume *vol;
mp = arg;
DROP_GIANT();
g_topology_lock();
g_raid_shutdown = 1;
LIST_FOREACH_SAFE(gp, &mp->geom, geom, gp2) {
if ((sc = gp->softc) == NULL)
continue;
g_topology_unlock();
sx_xlock(&sc->sc_lock);
TAILQ_FOREACH(vol, &sc->sc_volumes, v_next)
g_raid_clean(vol, -1);
g_cancel_event(sc);
g_raid_destroy(sc, G_RAID_DESTROY_DELAYED);
g_topology_lock();
}
g_topology_unlock();
PICKUP_GIANT();
}
static void
g_raid_init(struct g_class *mp)
{
g_raid_post_sync = EVENTHANDLER_REGISTER(shutdown_post_sync,
g_raid_shutdown_post_sync, mp, SHUTDOWN_PRI_FIRST);
if (g_raid_post_sync == NULL)
G_RAID_DEBUG(0, "Warning! Cannot register shutdown event.");
g_raid_started = 1;
}
static void
g_raid_fini(struct g_class *mp)
{
if (g_raid_post_sync != NULL)
EVENTHANDLER_DEREGISTER(shutdown_post_sync, g_raid_post_sync);
g_raid_started = 0;
}
int
g_raid_md_modevent(module_t mod, int type, void *arg)
{
struct g_raid_md_class *class, *c, *nc;
int error;
error = 0;
class = arg;
switch (type) {
case MOD_LOAD:
c = LIST_FIRST(&g_raid_md_classes);
if (c == NULL || c->mdc_priority > class->mdc_priority)
LIST_INSERT_HEAD(&g_raid_md_classes, class, mdc_list);
else {
while ((nc = LIST_NEXT(c, mdc_list)) != NULL &&
nc->mdc_priority < class->mdc_priority)
c = nc;
LIST_INSERT_AFTER(c, class, mdc_list);
}
if (g_raid_started)
g_retaste(&g_raid_class);
break;
case MOD_UNLOAD:
LIST_REMOVE(class, mdc_list);
break;
default:
error = EOPNOTSUPP;
break;
}
return (error);
}
int
g_raid_tr_modevent(module_t mod, int type, void *arg)
{
struct g_raid_tr_class *class, *c, *nc;
int error;
error = 0;
class = arg;
switch (type) {
case MOD_LOAD:
c = LIST_FIRST(&g_raid_tr_classes);
if (c == NULL || c->trc_priority > class->trc_priority)
LIST_INSERT_HEAD(&g_raid_tr_classes, class, trc_list);
else {
while ((nc = LIST_NEXT(c, trc_list)) != NULL &&
nc->trc_priority < class->trc_priority)
c = nc;
LIST_INSERT_AFTER(c, class, trc_list);
}
break;
case MOD_UNLOAD:
LIST_REMOVE(class, trc_list);
break;
default:
error = EOPNOTSUPP;
break;
}
return (error);
}
/*
* Use local implementation of DECLARE_GEOM_CLASS(g_raid_class, g_raid)
* to reduce module priority, allowing submodules to register them first.
*/
static moduledata_t g_raid_mod = {
"g_raid",
g_modevent,
&g_raid_class
};
DECLARE_MODULE(g_raid, g_raid_mod, SI_SUB_DRIVERS, SI_ORDER_THIRD);
MODULE_VERSION(geom_raid, 0);
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