freebsd-dev/sys/geom/vinum/geom_vinum_rename.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.
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*
* 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.
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*
* 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_rename_drive(struct gv_softc *, struct gctl_req *,
struct gv_drive *, char *, int);
static int gv_rename_plex(struct gv_softc *, struct gctl_req *,
struct gv_plex *, char *, int);
static int gv_rename_sd(struct gv_softc *, struct gctl_req *,
struct gv_sd *, char *, int);
static int gv_rename_vol(struct gv_softc *, struct gctl_req *,
struct gv_volume *, char *, int);
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;
int err, *flags, type;
sc = gp->softc;
flags = gctl_get_paraml(req, "flags", sizeof(*flags));
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;
}
err = gv_rename_vol(sc, req, v, newname, *flags);
if (err)
return;
break;
case GV_TYPE_PLEX:
p = gv_find_plex(sc, object);
if (p == NULL) {
gctl_error(req, "unknown plex '%s'", object);
return;
}
err = gv_rename_plex(sc, req, p, newname, *flags);
if (err)
return;
break;
case GV_TYPE_SD:
s = gv_find_sd(sc, object);
if (s == NULL) {
gctl_error(req, "unknown subdisk '%s'", object);
return;
}
err = gv_rename_sd(sc, req, s, newname, *flags);
if (err)
return;
break;
case GV_TYPE_DRIVE:
d = gv_find_drive(sc, object);
if (d == NULL) {
gctl_error(req, "unknown drive '%s'", object);
return;
}
err = gv_rename_drive(sc, req, d, newname, *flags);
if (err)
return;
break;
default:
gctl_error(req, "unknown object '%s'", object);
return;
}
gv_save_config_all(sc);
}
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static int
gv_rename_drive(struct gv_softc *sc, struct gctl_req *req, struct gv_drive *d, char *newname, int flags)
{
struct gv_sd *s;
g_topology_assert();
KASSERT(d != NULL, ("gv_rename_drive: NULL d"));
if (gv_object_type(sc, newname) != -1) {
gctl_error(req, "drive name '%s' already in use", newname);
return (-1);
}
strncpy(d->name, newname, GV_MAXDRIVENAME);
/* XXX can we rename providers here? */
LIST_FOREACH(s, &d->subdisks, from_drive)
strncpy(s->drive, d->name, GV_MAXDRIVENAME);
return (0);
}
static int
gv_rename_plex(struct gv_softc *sc, struct gctl_req *req, struct gv_plex *p, char *newname, int flags)
{
struct gv_sd *s;
char *plexnum, *plexnump, *oldplex, *oldplexp;
char *newsd, *oldsd, *oldsdp;
int err;
g_topology_assert();
KASSERT(p != NULL, ("gv_rename_plex: NULL p"));
err = 0;
if (gv_object_type(sc, newname) != -1) {
gctl_error(req, "plex name '%s' already in use", newname);
return (-1);
}
/* Needed for sanity checking. */
plexnum = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
strncpy(plexnum, newname, GV_MAXPLEXNAME);
plexnump = plexnum;
oldplex = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
strncpy(oldplex, p->name, GV_MAXPLEXNAME);
oldplexp = oldplex;
/*
* Locate the plex number part of the plex names.
*
* XXX: can we be sure that the current plex name has the format
* 'foo.pX'?
*/
strsep(&oldplexp, ".");
strsep(&plexnump, ".");
if (plexnump == NULL || *plexnump == '\0') {
gctl_error(req, "proposed plex name '%s' is not a valid plex "
"name", newname);
err = -1;
goto failure;
}
if (strcmp(oldplexp, plexnump)) {
gctl_error(req, "current and proposed plex numbers (%s, %s) "
"do not match", plexnump, oldplexp);
err = -1;
goto failure;
}
strncpy(p->name, newname, GV_MAXPLEXNAME);
/* XXX can we rename providers here? */
/* Fix up references and potentially rename subdisks. */
LIST_FOREACH(s, &p->subdisks, in_plex) {
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strncpy(s->plex, p->name, GV_MAXPLEXNAME);
if (flags && GV_FLAG_R) {
newsd = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
oldsd = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
oldsdp = oldsd;
strncpy(oldsd, s->name, GV_MAXSDNAME);
/*
* XXX: can we be sure that the current sd name has the
* format 'foo.pX.sY'?
*/
strsep(&oldsdp, ".");
strsep(&oldsdp, ".");
snprintf(newsd, GV_MAXSDNAME, "%s.%s", p->name, oldsdp);
err = gv_rename_sd(sc, req, s, newsd, flags);
g_free(newsd);
g_free(oldsd);
if (err)
goto failure;
}
}
failure:
g_free(plexnum);
g_free(oldplex);
return (err);
}
/*
* 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.
*/
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static int
gv_rename_sd(struct gv_softc *sc, struct gctl_req *req, struct gv_sd *s, char * newname, int flags)
{
char *new, *newp, *old, *oldp;
int err;
g_topology_assert();
KASSERT(s != NULL, ("gv_rename_sd: NULL s"));
err = 0;
if (gv_object_type(sc, newname) != -1) {
gctl_error(req, "subdisk name %s already in use", newname);
return (-1);
}
/* Needed for sanity checking. */
new = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
strncpy(new, newname, GV_MAXSDNAME);
newp = new;
old = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
strncpy(old, s->name, GV_MAXSDNAME);
oldp = old;
/*
* Locate the sd number part of the sd names.
*
* XXX: can we be sure that the current sd name has the format
* 'foo.pX.sY'?
*/
strsep(&oldp, ".");
strsep(&oldp, ".");
strsep(&newp, ".");
if (newp == NULL || *newp == '\0') {
gctl_error(req, "proposed sd name '%s' is not a valid sd name",
newname);
err = -1;
goto fail;
}
strsep(&newp, ".");
if (newp == NULL || *newp == '\0') {
gctl_error(req, "proposed sd name '%s' is not a valid sd name",
newname);
err = -1;
goto fail;
}
if (strcmp(newp, oldp)) {
gctl_error(req, "current and proposed sd numbers (%s, %s) do "
"not match", oldp, newp);
err = -1;
goto fail;
}
strncpy(s->name, newname, GV_MAXSDNAME);
/* XXX: can we rename providers here? */
fail:
g_free(new);
g_free(old);
return (err);
}
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static int
gv_rename_vol(struct gv_softc *sc, struct gctl_req *req, struct gv_volume *v, char *newname, int flags)
{
struct gv_plex *p;
char *new, *old, *oldp;
int err;
g_topology_assert();
KASSERT(v != NULL, ("gv_rename_vol: NULL v"));
if (gv_object_type(sc, newname) != -1) {
gctl_error(req, "volume name %s already in use", newname);
return (-1);
}
/* Rename the volume. */
strncpy(v->name, newname, GV_MAXVOLNAME);
/* Fix up references and potentially rename plexes. */
LIST_FOREACH(p, &v->plexes, in_volume) {
strncpy(p->volume, v->name, GV_MAXVOLNAME);
if (flags && GV_FLAG_R) {
new = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
old = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
oldp = old;
strncpy(old, p->name, GV_MAXPLEXNAME);
/*
* XXX: can we be sure that the current plex name has
* the format 'foo.pX'?
*/
strsep(&oldp, ".");
snprintf(new, GV_MAXPLEXNAME, "%s.%s", v->name, oldp);
err = gv_rename_plex(sc, req, p, new, flags);
g_free(new);
g_free(old);
if (err)
return (err);
}
}
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return (0);
}