freebsd-dev/sys/geom/vinum/geom_vinum_rm.c
2009-10-05 08:44:31 +00:00

389 lines
9.3 KiB
C

/*-
* Copyright (c) 2004, 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>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/libkern.h>
#include <sys/malloc.h>
#include <geom/geom.h>
#include <geom/vinum/geom_vinum_var.h>
#include <geom/vinum/geom_vinum.h>
/* General 'remove' routine. */
void
gv_remove(struct g_geom *gp, struct gctl_req *req)
{
struct gv_softc *sc;
struct gv_volume *v;
struct gv_plex *p;
struct gv_sd *s;
struct gv_drive *d;
int *argc, *flags;
char *argv, buf[20];
int i, type;
argc = gctl_get_paraml(req, "argc", sizeof(*argc));
if (argc == NULL || *argc == 0) {
gctl_error(req, "no arguments given");
return;
}
flags = gctl_get_paraml(req, "flags", sizeof(*flags));
if (flags == NULL) {
gctl_error(req, "no flags given");
return;
}
sc = gp->softc;
/* XXX config locking */
for (i = 0; i < *argc; i++) {
snprintf(buf, sizeof(buf), "argv%d", i);
argv = gctl_get_param(req, buf, NULL);
if (argv == NULL)
continue;
type = gv_object_type(sc, argv);
switch (type) {
case GV_TYPE_VOL:
v = gv_find_vol(sc, argv);
/*
* If this volume has plexes, we want a recursive
* removal.
*/
if (!LIST_EMPTY(&v->plexes) && !(*flags & GV_FLAG_R)) {
gctl_error(req, "volume '%s' has attached "
"plexes - need recursive removal", v->name);
return;
}
gv_post_event(sc, GV_EVENT_RM_VOLUME, v, NULL, 0, 0);
break;
case GV_TYPE_PLEX:
p = gv_find_plex(sc, argv);
/*
* If this plex has subdisks, we want a recursive
* removal.
*/
if (!LIST_EMPTY(&p->subdisks) &&
!(*flags & GV_FLAG_R)) {
gctl_error(req, "plex '%s' has attached "
"subdisks - need recursive removal",
p->name);
return;
}
/* Don't allow removal of the only plex of a volume. */
if (p->vol_sc != NULL && p->vol_sc->plexcount == 1) {
gctl_error(req, "plex '%s' is still attached "
"to volume '%s'", p->name, p->volume);
return;
}
gv_post_event(sc, GV_EVENT_RM_PLEX, p, NULL, 0, 0);
break;
case GV_TYPE_SD:
s = gv_find_sd(sc, argv);
/* Don't allow removal if attached to a plex. */
if (s->plex_sc != NULL) {
gctl_error(req, "subdisk '%s' is still attached"
" to plex '%s'", s->name, s->plex_sc->name);
return;
}
gv_post_event(sc, GV_EVENT_RM_SD, s, NULL, 0, 0);
break;
case GV_TYPE_DRIVE:
d = gv_find_drive(sc, argv);
/* We don't allow to remove open drives. */
if (gv_consumer_is_open(d->consumer) &&
!(*flags & GV_FLAG_F)) {
gctl_error(req, "drive '%s' is open", d->name);
return;
}
/* A drive with subdisks needs a recursive removal. */
/* if (!LIST_EMPTY(&d->subdisks) &&
!(*flags & GV_FLAG_R)) {
gctl_error(req, "drive '%s' still has subdisks"
" - need recursive removal", d->name);
return;
}*/
gv_post_event(sc, GV_EVENT_RM_DRIVE, d, NULL, *flags,
0);
break;
default:
gctl_error(req, "unknown object '%s'", argv);
return;
}
}
gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0);
}
/* Resets configuration */
int
gv_resetconfig(struct gv_softc *sc)
{
struct gv_drive *d, *d2;
struct gv_volume *v, *v2;
struct gv_plex *p, *p2;
struct gv_sd *s, *s2;
/* First make sure nothing is open. */
LIST_FOREACH_SAFE(d, &sc->drives, drive, d2) {
if (gv_consumer_is_open(d->consumer)) {
return (GV_ERR_ISBUSY);
}
}
/* Make sure nothing is going on internally. */
LIST_FOREACH_SAFE(p, &sc->plexes, plex, p2) {
if (p->flags & (GV_PLEX_REBUILDING | GV_PLEX_GROWING))
return (GV_ERR_ISBUSY);
}
/* Then if not, we remove everything. */
LIST_FOREACH_SAFE(s, &sc->subdisks, sd, s2)
gv_rm_sd(sc, s);
LIST_FOREACH_SAFE(d, &sc->drives, drive, d2)
gv_rm_drive(sc, d, 0);
LIST_FOREACH_SAFE(p, &sc->plexes, plex, p2)
gv_rm_plex(sc, p);
LIST_FOREACH_SAFE(v, &sc->volumes, volume, v2)
gv_rm_vol(sc, v);
gv_post_event(sc, GV_EVENT_SAVE_CONFIG, sc, NULL, 0, 0);
return (0);
}
/* Remove a volume. */
void
gv_rm_vol(struct gv_softc *sc, struct gv_volume *v)
{
struct g_provider *pp;
struct gv_plex *p, *p2;
KASSERT(v != NULL, ("gv_rm_vol: NULL v"));
pp = v->provider;
KASSERT(pp != NULL, ("gv_rm_vol: NULL pp"));
/* Check if any of our consumers is open. */
if (gv_provider_is_open(pp)) {
G_VINUM_DEBUG(0, "unable to remove %s: volume still in use",
v->name);
return;
}
/* Remove the plexes our volume has. */
LIST_FOREACH_SAFE(p, &v->plexes, in_volume, p2)
gv_rm_plex(sc, p);
/* Clean up. */
LIST_REMOVE(v, volume);
g_free(v);
/* Get rid of the volume's provider. */
if (pp != NULL) {
g_topology_lock();
pp->flags |= G_PF_WITHER;
g_orphan_provider(pp, ENXIO);
g_topology_unlock();
}
}
/* Remove a plex. */
void
gv_rm_plex(struct gv_softc *sc, struct gv_plex *p)
{
struct gv_volume *v;
struct gv_sd *s, *s2;
KASSERT(p != NULL, ("gv_rm_plex: NULL p"));
v = p->vol_sc;
/* Check if any of our consumers is open. */
if (v != NULL && gv_provider_is_open(v->provider) && v->plexcount < 2) {
G_VINUM_DEBUG(0, "unable to remove %s: volume still in use",
p->name);
return;
}
/* Remove the subdisks our plex has. */
LIST_FOREACH_SAFE(s, &p->subdisks, in_plex, s2)
gv_rm_sd(sc, s);
v = p->vol_sc;
/* Clean up and let our geom fade away. */
LIST_REMOVE(p, plex);
if (p->vol_sc != NULL) {
p->vol_sc->plexcount--;
LIST_REMOVE(p, in_volume);
p->vol_sc = NULL;
/* Correctly update the volume size. */
gv_update_vol_size(v, gv_vol_size(v));
}
g_free(p);
}
/* Remove a subdisk. */
void
gv_rm_sd(struct gv_softc *sc, struct gv_sd *s)
{
struct gv_plex *p;
struct gv_volume *v;
KASSERT(s != NULL, ("gv_rm_sd: NULL s"));
p = s->plex_sc;
v = NULL;
/* Clean up. */
if (p != NULL) {
LIST_REMOVE(s, in_plex);
s->plex_sc = NULL;
p->sdcount--;
/* Update the plexsize. */
p->size = gv_plex_size(p);
v = p->vol_sc;
if (v != NULL) {
/* Update the size of our plex' volume. */
gv_update_vol_size(v, gv_vol_size(v));
}
}
if (s->drive_sc && !(s->drive_sc->flags & GV_DRIVE_REFERENCED))
LIST_REMOVE(s, from_drive);
LIST_REMOVE(s, sd);
gv_free_sd(s);
g_free(s);
}
/* Remove a drive. */
void
gv_rm_drive(struct gv_softc *sc, struct gv_drive *d, int flags)
{
struct g_consumer *cp;
struct gv_freelist *fl, *fl2;
struct gv_plex *p;
struct gv_sd *s, *s2;
struct gv_volume *v;
struct gv_drive *d2;
int err;
KASSERT(d != NULL, ("gv_rm_drive: NULL d"));
cp = d->consumer;
if (cp != NULL) {
g_topology_lock();
err = g_access(cp, 0, 1, 0);
g_topology_unlock();
if (err) {
G_VINUM_DEBUG(0, "%s: unable to access '%s', "
"errno: %d", __func__, cp->provider->name, err);
return;
}
/* Clear the Vinum Magic. */
d->hdr->magic = GV_NOMAGIC;
err = gv_write_header(cp, d->hdr);
if (err)
G_VINUM_DEBUG(0, "gv_rm_drive: error writing header to"
" '%s', errno: %d", cp->provider->name, err);
g_topology_lock();
g_access(cp, -cp->acr, -cp->acw, -cp->ace);
g_detach(cp);
g_destroy_consumer(cp);
g_topology_unlock();
}
/* Remove all associated subdisks, plexes, volumes. */
if (flags & GV_FLAG_R) {
if (!LIST_EMPTY(&d->subdisks)) {
LIST_FOREACH_SAFE(s, &d->subdisks, from_drive, s2) {
p = s->plex_sc;
if (p != NULL) {
v = p->vol_sc;
if (v != NULL)
gv_rm_vol(sc, v);
}
}
}
}
/* Clean up. */
LIST_FOREACH_SAFE(fl, &d->freelist, freelist, fl2) {
LIST_REMOVE(fl, freelist);
g_free(fl);
}
LIST_REMOVE(d, drive);
g_free(d->hdr);
/* Put ourself into referenced state if we have subdisks. */
if (d->sdcount > 0) {
d->consumer = NULL;
d->hdr = NULL;
d->flags |= GV_DRIVE_REFERENCED;
snprintf(d->device, sizeof(d->device), "???");
d->size = 0;
d->avail = 0;
d->freelist_entries = 0;
LIST_FOREACH(s, &d->subdisks, from_drive) {
s->flags |= GV_SD_TASTED;
gv_set_sd_state(s, GV_SD_DOWN, GV_SETSTATE_FORCE);
}
/* Shuffle around so we keep gv_is_newer happy. */
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);
return;
}
g_free(d);
gv_save_config(sc);
}