freebsd-dev/sys/geom/vinum/geom_vinum_rename.c
Edward Tomasz Napierala 739a9c51b0 geom(4): Fix some of the "set but not used" warnings
The few I've left in place look like potential bugs.

Sponsored By:	EPSRC
2021-12-18 11:42:34 +00:00

265 lines
7.2 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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/malloc.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_rename(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;
char *newname, *object, *name;
int *flags, type;
sc = gp->softc;
flags = gctl_get_paraml(req, "flags", sizeof(*flags));
if (flags == NULL) {
gctl_error(req, "no flags given");
return;
}
newname = gctl_get_param(req, "newname", NULL);
if (newname == NULL) {
gctl_error(req, "no new name given");
return;
}
object = gctl_get_param(req, "object", NULL);
if (object == NULL) {
gctl_error(req, "no object given");
return;
}
type = gv_object_type(sc, object);
switch (type) {
case GV_TYPE_VOL:
v = gv_find_vol(sc, object);
if (v == NULL) {
gctl_error(req, "unknown volume '%s'", object);
return;
}
name = g_malloc(GV_MAXVOLNAME, M_WAITOK | M_ZERO);
strlcpy(name, newname, GV_MAXVOLNAME);
gv_post_event(sc, GV_EVENT_RENAME_VOL, v, name, *flags, 0);
break;
case GV_TYPE_PLEX:
p = gv_find_plex(sc, object);
if (p == NULL) {
gctl_error(req, "unknown plex '%s'", object);
return;
}
name = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
strlcpy(name, newname, GV_MAXPLEXNAME);
gv_post_event(sc, GV_EVENT_RENAME_PLEX, p, name, *flags, 0);
break;
case GV_TYPE_SD:
s = gv_find_sd(sc, object);
if (s == NULL) {
gctl_error(req, "unknown subdisk '%s'", object);
return;
}
name = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
strlcpy(name, newname, GV_MAXSDNAME);
gv_post_event(sc, GV_EVENT_RENAME_SD, s, name, *flags, 0);
break;
case GV_TYPE_DRIVE:
d = gv_find_drive(sc, object);
if (d == NULL) {
gctl_error(req, "unknown drive '%s'", object);
return;
}
name = g_malloc(GV_MAXDRIVENAME, M_WAITOK | M_ZERO);
strlcpy(name, newname, GV_MAXDRIVENAME);
gv_post_event(sc, GV_EVENT_RENAME_DRIVE, d, name, *flags, 0);
break;
default:
gctl_error(req, "unknown object '%s'", object);
return;
}
}
int
gv_rename_drive(struct gv_softc *sc, struct gv_drive *d, char *newname,
int flags)
{
struct gv_sd *s;
KASSERT(d != NULL, ("gv_rename_drive: NULL d"));
if (gv_object_type(sc, newname) != GV_ERR_NOTFOUND) {
G_VINUM_DEBUG(1, "drive name '%s' already in use", newname);
return (GV_ERR_NAMETAKEN);
}
strlcpy(d->name, newname, sizeof(d->name));
if (d->hdr != NULL)
strlcpy(d->hdr->label.name, newname, sizeof(d->hdr->label.name));
LIST_FOREACH(s, &d->subdisks, from_drive)
strlcpy(s->drive, d->name, sizeof(s->drive));
return (0);
}
int
gv_rename_plex(struct gv_softc *sc, struct gv_plex *p, char *newname, int flags)
{
char newsd[GV_MAXSDNAME];
struct gv_sd *s;
char *ptr;
int err;
KASSERT(p != NULL, ("gv_rename_plex: NULL p"));
if (gv_object_type(sc, newname) != GV_ERR_NOTFOUND) {
G_VINUM_DEBUG(1, "plex name '%s' already in use", newname);
return (GV_ERR_NAMETAKEN);
}
/*
* Locate the plex number part of the plex names.
* XXX: might be a good idea to sanitize input a bit more
*/
ptr = strrchr(newname, '.');
if (ptr == NULL) {
G_VINUM_DEBUG(0, "proposed plex name '%s' is not a valid plex "
"name", newname);
return (GV_ERR_INVNAME);
}
strlcpy(p->name, newname, sizeof(p->name));
/* Fix up references and potentially rename subdisks. */
LIST_FOREACH(s, &p->subdisks, in_plex) {
strlcpy(s->plex, p->name, sizeof(s->plex));
if (flags & GV_FLAG_R) {
/*
* Look for the two last dots in the string, and assume
* that the old value was ok.
*/
ptr = strrchr(s->name, '.');
if (ptr == NULL)
return (GV_ERR_INVNAME);
ptr++;
snprintf(newsd, sizeof(newsd), "%s.%s", p->name, ptr);
err = gv_rename_sd(sc, s, newsd, flags);
if (err)
return (err);
}
}
return (0);
}
/*
* gv_rename_sd: renames a subdisk. Note that the 'flags' argument is ignored,
* since there are no structures below a subdisk. Similarly, we don't have to
* clean up any references elsewhere to the subdisk's name.
*/
int
gv_rename_sd(struct gv_softc *sc, struct gv_sd *s, char *newname, int flags)
{
char *dot1, *dot2;
KASSERT(s != NULL, ("gv_rename_sd: NULL s"));
if (gv_object_type(sc, newname) != GV_ERR_NOTFOUND) {
G_VINUM_DEBUG(1, "subdisk name %s already in use", newname);
return (GV_ERR_NAMETAKEN);
}
/* Locate the sd number part of the sd names. */
dot1 = strchr(newname, '.');
if (dot1 == NULL || (dot2 = strchr(dot1 + 1, '.')) == NULL) {
G_VINUM_DEBUG(0, "proposed sd name '%s' is not a valid sd name",
newname);
return (GV_ERR_INVNAME);
}
strlcpy(s->name, newname, sizeof(s->name));
return (0);
}
int
gv_rename_vol(struct gv_softc *sc, struct gv_volume *v, char *newname,
int flags)
{
struct g_provider *pp __diagused;
struct gv_plex *p;
char newplex[GV_MAXPLEXNAME], *ptr;
int err;
KASSERT(v != NULL, ("gv_rename_vol: NULL v"));
pp = v->provider;
KASSERT(pp != NULL, ("gv_rename_vol: NULL pp"));
if (gv_object_type(sc, newname) != GV_ERR_NOTFOUND) {
G_VINUM_DEBUG(1, "volume name %s already in use", newname);
return (GV_ERR_NAMETAKEN);
}
/* Rename the volume. */
strlcpy(v->name, newname, sizeof(v->name));
/* Fix up references and potentially rename plexes. */
LIST_FOREACH(p, &v->plexes, in_volume) {
strlcpy(p->volume, v->name, sizeof(p->volume));
if (flags & GV_FLAG_R) {
/*
* Look for the last dot in the string, and assume that
* the old value was ok.
*/
ptr = strrchr(p->name, '.');
ptr++;
snprintf(newplex, sizeof(newplex), "%s.%s", v->name, ptr);
err = gv_rename_plex(sc, p, newplex, flags);
if (err)
return (err);
}
}
return (0);
}