275 lines
7.0 KiB
C
275 lines
7.0 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2007 Lukas Ertl
|
|
* 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 AUTHOR 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 AUTHOR 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>
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <geom/geom.h>
|
|
#include <geom/geom_dbg.h>
|
|
#include <geom/vinum/geom_vinum_var.h>
|
|
#include <geom/vinum/geom_vinum.h>
|
|
|
|
void
|
|
gv_post_event(struct gv_softc *sc, int event, void *arg1, void *arg2,
|
|
intmax_t arg3, intmax_t arg4)
|
|
{
|
|
struct gv_event *ev;
|
|
|
|
ev = g_malloc(sizeof(*ev), M_WAITOK | M_ZERO);
|
|
ev->type = event;
|
|
ev->arg1 = arg1;
|
|
ev->arg2 = arg2;
|
|
ev->arg3 = arg3;
|
|
ev->arg4 = arg4;
|
|
|
|
mtx_lock(&sc->equeue_mtx);
|
|
TAILQ_INSERT_TAIL(&sc->equeue, ev, events);
|
|
wakeup(sc);
|
|
mtx_unlock(&sc->equeue_mtx);
|
|
}
|
|
|
|
void
|
|
gv_worker_exit(struct gv_softc *sc)
|
|
{
|
|
struct gv_event *ev;
|
|
|
|
ev = g_malloc(sizeof(*ev), M_WAITOK | M_ZERO);
|
|
ev->type = GV_EVENT_THREAD_EXIT;
|
|
|
|
mtx_lock(&sc->equeue_mtx);
|
|
TAILQ_INSERT_TAIL(&sc->equeue, ev, events);
|
|
wakeup(sc);
|
|
msleep(sc->worker, &sc->equeue_mtx, PDROP, "gv_wor", 0);
|
|
}
|
|
|
|
struct gv_event *
|
|
gv_get_event(struct gv_softc *sc)
|
|
{
|
|
struct gv_event *ev;
|
|
|
|
KASSERT(sc != NULL, ("NULL sc"));
|
|
mtx_lock(&sc->equeue_mtx);
|
|
ev = TAILQ_FIRST(&sc->equeue);
|
|
mtx_unlock(&sc->equeue_mtx);
|
|
return (ev);
|
|
}
|
|
|
|
void
|
|
gv_remove_event(struct gv_softc *sc, struct gv_event *ev)
|
|
{
|
|
|
|
KASSERT(sc != NULL, ("NULL sc"));
|
|
KASSERT(ev != NULL, ("NULL ev"));
|
|
mtx_lock(&sc->equeue_mtx);
|
|
TAILQ_REMOVE(&sc->equeue, ev, events);
|
|
mtx_unlock(&sc->equeue_mtx);
|
|
}
|
|
|
|
void
|
|
gv_drive_tasted(struct gv_softc *sc, struct g_provider *pp)
|
|
{
|
|
struct g_geom *gp;
|
|
struct g_consumer *cp;
|
|
struct gv_hdr *hdr;
|
|
struct gv_drive *d;
|
|
char *buf;
|
|
int error;
|
|
|
|
hdr = NULL;
|
|
buf = NULL;
|
|
|
|
G_VINUM_DEBUG(2, "tasted drive on '%s'", pp->name);
|
|
if ((GV_CFG_OFFSET % pp->sectorsize) != 0 ||
|
|
(GV_CFG_LEN % pp->sectorsize) != 0) {
|
|
G_VINUM_DEBUG(0, "provider %s has unsupported sectorsize.",
|
|
pp->name);
|
|
return;
|
|
}
|
|
|
|
gp = sc->geom;
|
|
g_topology_lock();
|
|
cp = g_new_consumer(gp);
|
|
if (g_attach(cp, pp) != 0) {
|
|
g_destroy_consumer(cp);
|
|
g_topology_unlock();
|
|
G_VINUM_DEBUG(0, "failed to attach to provider on taste event");
|
|
return;
|
|
}
|
|
if (g_access(cp, 1, 0, 0) != 0) {
|
|
g_detach(cp);
|
|
g_destroy_consumer(cp);
|
|
g_topology_unlock();
|
|
G_VINUM_DEBUG(0, "failed to access consumer on taste event");
|
|
return;
|
|
}
|
|
g_topology_unlock();
|
|
|
|
hdr = g_malloc(GV_HDR_LEN, M_WAITOK | M_ZERO);
|
|
/* Read header and on-disk configuration. */
|
|
error = gv_read_header(cp, hdr);
|
|
if (error) {
|
|
G_VINUM_DEBUG(0, "failed to read header during taste");
|
|
goto failed;
|
|
}
|
|
|
|
/*
|
|
* Setup the drive before we parse the on-disk configuration, so that
|
|
* we already know about the drive then.
|
|
*/
|
|
d = gv_find_drive(sc, hdr->label.name);
|
|
if (d == NULL) {
|
|
d = g_malloc(sizeof(*d), M_WAITOK | M_ZERO);
|
|
strlcpy(d->name, hdr->label.name, sizeof(d->name));
|
|
strlcpy(d->device, pp->name, sizeof(d->device));
|
|
} else if (d->flags & GV_DRIVE_REFERENCED) {
|
|
strlcpy(d->device, pp->name, sizeof(d->device));
|
|
d->flags &= ~GV_DRIVE_REFERENCED;
|
|
} else {
|
|
G_VINUM_DEBUG(2, "drive '%s' is already known", d->name);
|
|
goto failed;
|
|
}
|
|
|
|
/* Add the consumer and header to the new drive. */
|
|
d->consumer = cp;
|
|
d->hdr = hdr;
|
|
gv_create_drive(sc, d);
|
|
|
|
buf = g_read_data(cp, GV_CFG_OFFSET, GV_CFG_LEN, NULL);
|
|
if (buf == NULL) {
|
|
G_VINUM_DEBUG(0, "failed to read config during taste");
|
|
goto failed;
|
|
}
|
|
gv_parse_config(sc, buf, d);
|
|
g_free(buf);
|
|
|
|
g_topology_lock();
|
|
g_access(cp, -1, 0, 0);
|
|
g_topology_unlock();
|
|
|
|
gv_setup_objects(sc);
|
|
gv_set_drive_state(d, GV_DRIVE_UP, 0);
|
|
|
|
return;
|
|
|
|
failed:
|
|
g_free(hdr);
|
|
g_topology_lock();
|
|
g_access(cp, -1, 0, 0);
|
|
g_detach(cp);
|
|
g_destroy_consumer(cp);
|
|
g_topology_unlock();
|
|
}
|
|
|
|
/*
|
|
* Count completed BIOs and handle orphanization when all are done.
|
|
*/
|
|
void
|
|
gv_drive_done(struct gv_drive *d)
|
|
{
|
|
|
|
KASSERT(d->active >= 0, ("Negative number of BIOs (%d)", d->active));
|
|
if (--d->active == 0 && (d->flags & GV_DRIVE_ORPHANED)) {
|
|
d->flags &= ~GV_DRIVE_ORPHANED;
|
|
gv_post_event(d->vinumconf, GV_EVENT_DRIVE_LOST, d, NULL, 0, 0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* When losing a drive (e.g. hardware failure), we cut down the consumer
|
|
* attached to the underlying device and bring the drive itself to a
|
|
* "referenced" state so that normal tasting could bring it up cleanly if it
|
|
* possibly arrives again.
|
|
*/
|
|
void
|
|
gv_drive_lost(struct gv_softc *sc, struct gv_drive *d)
|
|
{
|
|
struct g_consumer *cp;
|
|
struct gv_drive *d2;
|
|
struct gv_sd *s, *s2;
|
|
struct gv_freelist *fl, *fl2;
|
|
|
|
gv_set_drive_state(d, GV_DRIVE_DOWN,
|
|
GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG);
|
|
|
|
cp = d->consumer;
|
|
|
|
if (cp != NULL) {
|
|
if (d->active > 0) {
|
|
G_VINUM_DEBUG(2, "dead drive '%s' has still active "
|
|
"requests, unable to detach consumer", d->name);
|
|
d->flags |= GV_DRIVE_ORPHANED;
|
|
return;
|
|
}
|
|
g_topology_lock();
|
|
if (cp->acr != 0 || cp->acw != 0 || cp->ace != 0)
|
|
g_access(cp, -cp->acr, -cp->acw, -cp->ace);
|
|
g_detach(cp);
|
|
g_destroy_consumer(cp);
|
|
g_topology_unlock();
|
|
}
|
|
|
|
LIST_FOREACH_SAFE(fl, &d->freelist, freelist, fl2) {
|
|
LIST_REMOVE(fl, freelist);
|
|
g_free(fl);
|
|
}
|
|
|
|
d->consumer = NULL;
|
|
g_free(d->hdr);
|
|
d->hdr = NULL;
|
|
d->flags |= GV_DRIVE_REFERENCED;
|
|
snprintf(d->device, sizeof(d->device), "???");
|
|
d->size = 0;
|
|
d->avail = 0;
|
|
d->freelist_entries = 0;
|
|
d->sdcount = 0;
|
|
|
|
/* Put the subdisk in tasted mode, and remove from drive list. */
|
|
LIST_FOREACH_SAFE(s, &d->subdisks, from_drive, s2) {
|
|
LIST_REMOVE(s, from_drive);
|
|
s->flags |= GV_SD_TASTED;
|
|
}
|
|
|
|
/*
|
|
* Don't forget that gv_is_newer wants a "real" drive at the beginning
|
|
* of the list, so, just to be safe, we shuffle around.
|
|
*/
|
|
LIST_REMOVE(d, drive);
|
|
d2 = LIST_FIRST(&sc->drives);
|
|
if (d2 == NULL)
|
|
LIST_INSERT_HEAD(&sc->drives, d, drive);
|
|
else
|
|
LIST_INSERT_AFTER(d2, d, drive);
|
|
gv_save_config(sc);
|
|
}
|