7e11b694f4
practice, but it is a good programming practice nontheless and it allows the kernel to not depend on userland correctness. Found with: Coverity Prevent(tm) CID: 655-659, 664-667
353 lines
9.0 KiB
C
353 lines
9.0 KiB
C
/*-
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* Copyright (c) 2005 Chris Jones
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Chris Jones
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* thanks to the support of Google's Summer of Code program and
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* mentoring by Lukas Ertl.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/libkern.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <geom/geom.h>
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#include <geom/vinum/geom_vinum_var.h>
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#include <geom/vinum/geom_vinum.h>
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#include <geom/vinum/geom_vinum_share.h>
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static int gv_rename_drive(struct gv_softc *, struct gctl_req *,
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struct gv_drive *, char *, int);
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static int gv_rename_plex(struct gv_softc *, struct gctl_req *,
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struct gv_plex *, char *, int);
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static int gv_rename_sd(struct gv_softc *, struct gctl_req *,
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struct gv_sd *, char *, int);
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static int gv_rename_vol(struct gv_softc *, struct gctl_req *,
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struct gv_volume *, char *, int);
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void
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gv_rename(struct g_geom *gp, struct gctl_req *req)
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{
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struct gv_softc *sc;
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struct gv_volume *v;
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struct gv_plex *p;
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struct gv_sd *s;
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struct gv_drive *d;
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char *newname, *object;
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int err, *flags, type;
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sc = gp->softc;
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flags = gctl_get_paraml(req, "flags", sizeof(*flags));
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if (flags == NULL) {
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gctl_error(req, "no flags given");
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return;
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}
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newname = gctl_get_param(req, "newname", NULL);
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if (newname == NULL) {
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gctl_error(req, "no new name given");
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return;
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}
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object = gctl_get_param(req, "object", NULL);
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if (object == NULL) {
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gctl_error(req, "no object given");
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return;
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}
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type = gv_object_type(sc, object);
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switch (type) {
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case GV_TYPE_VOL:
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v = gv_find_vol(sc, object);
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if (v == NULL) {
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gctl_error(req, "unknown volume '%s'", object);
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return;
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}
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err = gv_rename_vol(sc, req, v, newname, *flags);
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if (err)
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return;
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break;
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case GV_TYPE_PLEX:
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p = gv_find_plex(sc, object);
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if (p == NULL) {
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gctl_error(req, "unknown plex '%s'", object);
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return;
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}
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err = gv_rename_plex(sc, req, p, newname, *flags);
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if (err)
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return;
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break;
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case GV_TYPE_SD:
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s = gv_find_sd(sc, object);
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if (s == NULL) {
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gctl_error(req, "unknown subdisk '%s'", object);
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return;
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}
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err = gv_rename_sd(sc, req, s, newname, *flags);
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if (err)
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return;
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break;
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case GV_TYPE_DRIVE:
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d = gv_find_drive(sc, object);
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if (d == NULL) {
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gctl_error(req, "unknown drive '%s'", object);
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return;
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}
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err = gv_rename_drive(sc, req, d, newname, *flags);
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if (err)
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return;
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break;
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default:
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gctl_error(req, "unknown object '%s'", object);
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return;
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}
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gv_save_config_all(sc);
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}
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static int
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gv_rename_drive(struct gv_softc *sc, struct gctl_req *req, struct gv_drive *d, char *newname, int flags)
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{
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struct gv_sd *s;
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g_topology_assert();
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KASSERT(d != NULL, ("gv_rename_drive: NULL d"));
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if (gv_object_type(sc, newname) != -1) {
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gctl_error(req, "drive name '%s' already in use", newname);
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return (-1);
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}
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strncpy(d->name, newname, GV_MAXDRIVENAME);
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strncpy(d->hdr->label.name, newname, GV_MAXDRIVENAME);
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/* XXX can we rename providers here? */
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LIST_FOREACH(s, &d->subdisks, from_drive)
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strncpy(s->drive, d->name, GV_MAXDRIVENAME);
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return (0);
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}
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static int
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gv_rename_plex(struct gv_softc *sc, struct gctl_req *req, struct gv_plex *p, char *newname, int flags)
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{
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struct gv_sd *s;
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char *plexnum, *plexnump, *oldplex, *oldplexp;
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char *newsd, *oldsd, *oldsdp;
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int err;
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g_topology_assert();
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KASSERT(p != NULL, ("gv_rename_plex: NULL p"));
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err = 0;
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if (gv_object_type(sc, newname) != -1) {
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gctl_error(req, "plex name '%s' already in use", newname);
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return (-1);
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}
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/* Needed for sanity checking. */
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plexnum = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
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strncpy(plexnum, newname, GV_MAXPLEXNAME);
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plexnump = plexnum;
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oldplex = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
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strncpy(oldplex, p->name, GV_MAXPLEXNAME);
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oldplexp = oldplex;
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/*
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* Locate the plex number part of the plex names.
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*
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* XXX: can we be sure that the current plex name has the format
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* 'foo.pX'?
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*/
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strsep(&oldplexp, ".");
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strsep(&plexnump, ".");
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if (plexnump == NULL || *plexnump == '\0') {
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gctl_error(req, "proposed plex name '%s' is not a valid plex "
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"name", newname);
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err = -1;
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goto failure;
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}
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if (strcmp(oldplexp, plexnump)) {
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gctl_error(req, "current and proposed plex numbers (%s, %s) "
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"do not match", plexnump, oldplexp);
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err = -1;
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goto failure;
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}
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strncpy(p->name, newname, GV_MAXPLEXNAME);
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/* XXX can we rename providers here? */
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/* Fix up references and potentially rename subdisks. */
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LIST_FOREACH(s, &p->subdisks, in_plex) {
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strncpy(s->plex, p->name, GV_MAXPLEXNAME);
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if (flags && GV_FLAG_R) {
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newsd = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
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oldsd = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
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oldsdp = oldsd;
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strncpy(oldsd, s->name, GV_MAXSDNAME);
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/*
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* XXX: can we be sure that the current sd name has the
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* format 'foo.pX.sY'?
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*/
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strsep(&oldsdp, ".");
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strsep(&oldsdp, ".");
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snprintf(newsd, GV_MAXSDNAME, "%s.%s", p->name, oldsdp);
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err = gv_rename_sd(sc, req, s, newsd, flags);
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g_free(newsd);
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g_free(oldsd);
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if (err)
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goto failure;
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}
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}
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failure:
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g_free(plexnum);
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g_free(oldplex);
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return (err);
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}
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/*
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* gv_rename_sd: renames a subdisk. Note that the 'flags' argument is ignored,
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* since there are no structures below a subdisk. Similarly, we don't have to
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* clean up any references elsewhere to the subdisk's name.
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*/
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static int
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gv_rename_sd(struct gv_softc *sc, struct gctl_req *req, struct gv_sd *s, char * newname, int flags)
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{
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char *new, *newp, *old, *oldp;
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int err;
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g_topology_assert();
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KASSERT(s != NULL, ("gv_rename_sd: NULL s"));
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err = 0;
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if (gv_object_type(sc, newname) != -1) {
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gctl_error(req, "subdisk name %s already in use", newname);
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return (-1);
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}
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/* Needed for sanity checking. */
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new = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
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strncpy(new, newname, GV_MAXSDNAME);
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newp = new;
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old = g_malloc(GV_MAXSDNAME, M_WAITOK | M_ZERO);
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strncpy(old, s->name, GV_MAXSDNAME);
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oldp = old;
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/*
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* Locate the sd number part of the sd names.
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*
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* XXX: can we be sure that the current sd name has the format
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* 'foo.pX.sY'?
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*/
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strsep(&oldp, ".");
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strsep(&oldp, ".");
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strsep(&newp, ".");
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if (newp == NULL || *newp == '\0') {
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gctl_error(req, "proposed sd name '%s' is not a valid sd name",
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newname);
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err = -1;
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goto fail;
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}
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strsep(&newp, ".");
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if (newp == NULL || *newp == '\0') {
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gctl_error(req, "proposed sd name '%s' is not a valid sd name",
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newname);
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err = -1;
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goto fail;
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}
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if (strcmp(newp, oldp)) {
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gctl_error(req, "current and proposed sd numbers (%s, %s) do "
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"not match", oldp, newp);
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err = -1;
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goto fail;
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}
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strncpy(s->name, newname, GV_MAXSDNAME);
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/* XXX: can we rename providers here? */
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fail:
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g_free(new);
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g_free(old);
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return (err);
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}
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static int
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gv_rename_vol(struct gv_softc *sc, struct gctl_req *req, struct gv_volume *v, char *newname, int flags)
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{
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struct gv_plex *p;
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char *new, *old, *oldp;
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int err;
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g_topology_assert();
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KASSERT(v != NULL, ("gv_rename_vol: NULL v"));
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if (gv_object_type(sc, newname) != -1) {
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gctl_error(req, "volume name %s already in use", newname);
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return (-1);
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}
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/* Rename the volume. */
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strncpy(v->name, newname, GV_MAXVOLNAME);
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/* Fix up references and potentially rename plexes. */
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LIST_FOREACH(p, &v->plexes, in_volume) {
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strncpy(p->volume, v->name, GV_MAXVOLNAME);
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if (flags && GV_FLAG_R) {
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new = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
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old = g_malloc(GV_MAXPLEXNAME, M_WAITOK | M_ZERO);
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oldp = old;
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strncpy(old, p->name, GV_MAXPLEXNAME);
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/*
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* XXX: can we be sure that the current plex name has
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* the format 'foo.pX'?
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*/
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strsep(&oldp, ".");
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snprintf(new, GV_MAXPLEXNAME, "%s.%s", v->name, oldp);
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err = gv_rename_plex(sc, req, p, new, flags);
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g_free(new);
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g_free(old);
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if (err)
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return (err);
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}
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}
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return (0);
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}
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