freebsd-dev/sys/geom/vinum/geom_vinum_move.c

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/*-
* Copyright (c) 2005 Chris Jones
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Chris Jones
* thanks to the support of Google's Summer of Code program and
* mentoring by Lukas Ertl.
*
* 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/kernel.h>
#include <sys/malloc.h>
#include <geom/geom.h>
#include <geom/vinum/geom_vinum_var.h>
#include <geom/vinum/geom_vinum.h>
#include <geom/vinum/geom_vinum_share.h>
static int gv_move_sd(struct gv_softc *, struct gctl_req *,
struct gv_sd *, char *, int);
void
gv_move(struct g_geom *gp, struct gctl_req *req)
{
struct gv_softc *sc;
struct gv_sd *s;
char buf[20], *destination, *object;
int *argc, err, *flags, i, type;
sc = gp->softc;
argc = gctl_get_paraml(req, "argc", sizeof(*argc));
flags = gctl_get_paraml(req, "flags", sizeof(*flags));
destination = gctl_get_param(req, "destination", NULL);
if (destination == NULL) {
gctl_error(req, "no destination given");
return;
}
if (gv_object_type(sc, destination) != GV_TYPE_DRIVE) {
gctl_error(req, "destination '%s' is not a drive", destination);
return;
}
/*
* We start with 1 here, because argv[0] on the command line is the
* destination drive.
*/
for (i = 1; i < *argc; i++) {
snprintf(buf, sizeof(buf), "argv%d", i);
object = gctl_get_param(req, buf, NULL);
if (object == NULL)
continue;
type = gv_object_type(sc, object);
if (type != GV_TYPE_SD) {
gctl_error(req, "you can only move subdisks; "
"'%s' isn't one", object);
return;
}
s = gv_find_sd(sc, object);
if (s == NULL) {
gctl_error(req, "unknown subdisk '%s'", object);
return;
}
err = gv_move_sd(sc, req, s, destination, *flags);
if (err)
return;
}
gv_save_config_all(sc);
}
/* Move a subdisk. */
static int
gv_move_sd(struct gv_softc *sc, struct gctl_req *req, struct gv_sd *cursd, char *destination, int flags)
{
struct gv_drive *d;
struct gv_sd *newsd, *s, *s2;
struct gv_plex *p;
struct g_consumer *cp;
char errstr[ERRBUFSIZ];
int err;
g_topology_assert();
KASSERT(cursd != NULL, ("gv_move_sd: NULL cursd"));
cp = cursd->consumer;
if (cp != NULL && (cp->acr || cp->acw || cp->ace)) {
gctl_error(req, "subdisk '%s' is busy", cursd->name);
return (-1);
}
if (!(flags && GV_FLAG_F)) {
gctl_error(req, "-f flag not passed; move would be "
"destructive");
return (-1);
}
d = gv_find_drive(sc, destination);
if (d == NULL) {
gctl_error(req, "destination drive '%s' not found",
destination);
return (-1);
}
if (d == cursd->drive_sc) {
gctl_error(req, "subdisk '%s' already on drive '%s'",
cursd->name, destination);
return (-1);
}
/* XXX: Does it have to be part of a plex? */
p = gv_find_plex(sc, cursd->plex);
if (p == NULL) {
gctl_error(req, "subdisk '%s' is not part of a plex",
cursd->name);
return (-1);
}
/* Stale the old subdisk. */
err = gv_set_sd_state(cursd, GV_SD_STALE,
GV_SETSTATE_FORCE | GV_SETSTATE_CONFIG);
if (err) {
gctl_error(req, "could not set the subdisk '%s' to state "
"'stale'", cursd->name);
return (err);
}
/*
* Create new subdisk. Ideally, we'd use gv_new_sd, but that requires
* us to create a string for it to parse, which is silly.
* TODO: maybe refactor gv_new_sd such that this is no longer the case.
*/
newsd = g_malloc(sizeof(struct gv_sd), M_WAITOK | M_ZERO);
newsd->plex_offset = cursd->plex_offset;
newsd->size = cursd->size;
newsd->drive_offset = -1;
strncpy(newsd->name, cursd->name, GV_MAXSDNAME);
strncpy(newsd->drive, destination, GV_MAXDRIVENAME);
strncpy(newsd->plex, cursd->plex, GV_MAXPLEXNAME);
newsd->state = GV_SD_STALE;
newsd->vinumconf = cursd->vinumconf;
err = gv_sd_to_drive(sc, d, newsd, errstr, ERRBUFSIZ);
if (err) {
/* XXX not enough free space? */
gctl_error(req, errstr);
g_free(newsd);
return (err);
}
/* Replace the old sd by the new one. */
if (cp != NULL)
g_detach(cp);
LIST_FOREACH_SAFE(s, &p->subdisks, in_plex, s2) {
if (s == cursd) {
p->sdcount--;
p->size -= s->size;
err = gv_rm_sd(sc, req, s, 0);
if (err)
return (err);
}
}
gv_sd_to_plex(p, newsd, 1);
/* Creates the new providers.... */
gv_drive_modify(d);
/* And reconnect the consumer ... */
if (cp != NULL) {
newsd->consumer = cp;
err = g_attach(cp, newsd->provider);
if (err) {
g_destroy_consumer(cp);
gctl_error(req, "proposed move would create a loop "
"in GEOM config");
return (err);
}
}
LIST_INSERT_HEAD(&sc->subdisks, newsd, sd);
gv_save_config_all(sc);
return (0);
}