437 lines
10 KiB
C
437 lines
10 KiB
C
/*
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* Copyright (c) 2004 Lukas Ertl
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* All rights reserved.
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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 void gv_cleanup_pp(void *, int);
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static void gv_free_sd(struct gv_sd *);
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static int gv_rm_drive(struct gv_softc *, struct gctl_req *,
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struct gv_drive *, int);
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static int gv_rm_plex(struct gv_softc *, struct gctl_req *,
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struct gv_plex *, int);
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static int gv_rm_sd(struct gv_softc *, struct gctl_req *, struct gv_sd *,
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int);
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static int gv_rm_vol(struct gv_softc *, struct gctl_req *,
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struct gv_volume *, int);
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/* General 'remove' routine. */
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void
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gv_remove(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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int *argc, *flags;
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char *argv, buf[20];
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int i, type, err;
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argc = gctl_get_paraml(req, "argc", sizeof(*argc));
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flags = gctl_get_paraml(req, "flags", sizeof(*flags));
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if (argc == NULL || *argc == 0) {
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gctl_error(req, "no arguments given");
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return;
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}
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sc = gp->softc;
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for (i = 0; i < *argc; i++) {
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snprintf(buf, sizeof(buf), "argv%d", i);
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argv = gctl_get_param(req, buf, NULL);
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if (argv == NULL)
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continue;
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type = gv_object_type(sc, argv);
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switch (type) {
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case GV_TYPE_VOL:
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v = gv_find_vol(sc, argv);
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if (v == NULL) {
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gctl_error(req, "unknown volume '%s'", argv);
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return;
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}
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err = gv_rm_vol(sc, req, v, *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, argv);
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if (p == NULL) {
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gctl_error(req, "unknown plex '%s'", argv);
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return;
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}
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err = gv_rm_plex(sc, req, p, *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, argv);
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if (s == NULL) {
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gctl_error(req, "unknown subdisk '%s'", argv);
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return;
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}
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err = gv_rm_sd(sc, req, s, *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, argv);
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if (d == NULL) {
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gctl_error(req, "unknown drive '%s'", argv);
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return;
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}
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err = gv_rm_drive(sc, req, d, *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'", argv);
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return;
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}
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}
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gv_save_config_all(sc);
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}
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/* Remove a volume. */
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static int
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gv_rm_vol(struct gv_softc *sc, struct gctl_req *req, struct gv_volume *v, int flags)
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{
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struct g_geom *gp;
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struct gv_plex *p, *p2;
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int err;
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g_topology_assert();
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KASSERT(v != NULL, ("gv_rm_vol: NULL v"));
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/* If this volume has plexes, we want a recursive removal. */
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if (!LIST_EMPTY(&v->plexes) && !(flags & GV_FLAG_R)) {
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gctl_error(req, "volume '%s' has attached plexes", v->name);
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return (-1);
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}
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gp = v->geom;
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/* Check if any of our consumers is open. */
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if (gp != NULL && gv_is_open(gp)) {
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gctl_error(req, "volume '%s' is busy", v->name);
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return (-1);
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}
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/* Remove the plexes our volume has. */
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LIST_FOREACH_SAFE(p, &v->plexes, in_volume, p2) {
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v->plexcount--;
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LIST_REMOVE(p, in_volume);
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p->vol_sc = NULL;
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err = gv_rm_plex(sc, req, p, flags);
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if (err)
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return (err);
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}
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/* Clean up and let our geom fade away. */
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LIST_REMOVE(v, volume);
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g_free(v);
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if (gp != NULL) {
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gp->softc = NULL;
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g_wither_geom(gp, ENXIO);
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}
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return (0);
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}
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/* Remove a plex. */
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static int
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gv_rm_plex(struct gv_softc *sc, struct gctl_req *req, struct gv_plex *p, int flags)
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{
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struct g_geom *gp;
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struct gv_sd *s, *s2;
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int err;
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g_topology_assert();
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KASSERT(p != NULL, ("gv_rm_plex: NULL p"));
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/* If this plex has subdisks, we want a recursive removal. */
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if (!LIST_EMPTY(&p->subdisks) && !(flags & GV_FLAG_R)) {
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gctl_error(req, "plex '%s' has attached subdisks", p->name);
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return (-1);
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}
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if (p->vol_sc != NULL && p->vol_sc->plexcount == 1) {
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gctl_error(req, "plex '%s' is still attached to volume '%s'",
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p->name, p->volume);
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return (-1);
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}
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gp = p->geom;
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/* Check if any of our consumers is open. */
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if (gp != NULL && gv_is_open(gp)) {
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gctl_error(req, "plex '%s' is busy", p->name);
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return (-1);
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}
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/* Remove the subdisks our plex has. */
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LIST_FOREACH_SAFE(s, &p->subdisks, in_plex, s2) {
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p->sdcount--;
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#if 0
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LIST_REMOVE(s, in_plex);
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s->plex_sc = NULL;
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#endif
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err = gv_rm_sd(sc, req, s, flags);
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if (err)
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return (err);
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}
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/* Clean up and let our geom fade away. */
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LIST_REMOVE(p, plex);
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if (p->vol_sc != NULL) {
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p->vol_sc->plexcount--;
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LIST_REMOVE(p, in_volume);
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p->vol_sc = NULL;
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}
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gv_kill_thread(p);
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g_free(p);
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if (gp != NULL) {
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gp->softc = NULL;
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g_wither_geom(gp, ENXIO);
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}
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return (0);
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}
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/* Remove a subdisk. */
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static int
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gv_rm_sd(struct gv_softc *sc, struct gctl_req *req, struct gv_sd *s, int flags)
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{
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struct gv_drive *d;
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struct g_geom *gp;
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struct g_provider *pp;
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KASSERT(s != NULL, ("gv_rm_sd: NULL s"));
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d = s->drive_sc;
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KASSERT(d != NULL, ("gv_rm_sd: NULL d"));
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gp = d->geom;
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KASSERT(gp != NULL, ("gv_rm_sd: NULL gp"));
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pp = s->provider;
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/* Clean up. */
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LIST_REMOVE(s, in_plex);
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LIST_REMOVE(s, from_drive);
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LIST_REMOVE(s, sd);
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gv_free_sd(s);
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g_free(s);
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/* If the subdisk has a provider we need to clean up this one too. */
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if (pp != NULL) {
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g_orphan_provider(pp, ENXIO);
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if (LIST_EMPTY(&pp->consumers))
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g_destroy_provider(pp);
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else
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/* Schedule this left-over provider for destruction. */
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g_post_event(gv_cleanup_pp, pp, M_WAITOK, pp, NULL);
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}
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return (0);
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}
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/* Remove a drive. */
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static int
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gv_rm_drive(struct gv_softc *sc, struct gctl_req *req, struct gv_drive *d, int flags)
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{
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struct g_geom *gp;
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struct g_consumer *cp;
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struct gv_freelist *fl, *fl2;
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struct gv_plex *p;
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struct gv_sd *s, *s2;
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struct gv_volume *v;
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int err;
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KASSERT(d != NULL, ("gv_rm_drive: NULL d"));
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gp = d->geom;
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KASSERT(gp != NULL, ("gv_rm_drive: NULL gp"));
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/* We don't allow to remove open drives. */
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if (gv_is_open(gp)) {
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gctl_error(req, "drive '%s' is open", d->name);
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return (-1);
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}
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/* A drive with subdisks needs a recursive removal. */
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if (!LIST_EMPTY(&d->subdisks) && !(flags & GV_FLAG_R)) {
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gctl_error(req, "drive '%s' still has subdisks", d->name);
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return (-1);
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}
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cp = LIST_FIRST(&gp->consumer);
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err = g_access(cp, 0, 1, 0);
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if (err) {
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printf("GEOM_VINUM: gv_rm_drive: couldn't access '%s', errno: "
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"%d\n", cp->provider->name, err);
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return (err);
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}
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/* Clear the Vinum Magic. */
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d->hdr->magic = GV_NOMAGIC;
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g_topology_unlock();
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err = g_write_data(cp, GV_HDR_OFFSET, d->hdr, GV_HDR_LEN);
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if (err) {
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printf("GEOM_VINUM: gv_rm_drive: couldn't write header to '%s'"
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", errno: %d\n", cp->provider->name, err);
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d->hdr->magic = GV_MAGIC;
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}
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g_topology_lock();
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g_access(cp, 0, -1, 0);
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/* Remove all associated subdisks, plexes, volumes. */
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if (!LIST_EMPTY(&d->subdisks)) {
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LIST_FOREACH_SAFE(s, &d->subdisks, from_drive, s2) {
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p = s->plex_sc;
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if (p != NULL) {
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v = p->vol_sc;
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if (v != NULL)
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gv_rm_vol(sc, req, v, flags);
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}
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}
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}
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/* Clean up. */
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LIST_FOREACH_SAFE(fl, &d->freelist, freelist, fl2) {
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LIST_REMOVE(fl, freelist);
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g_free(fl);
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}
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LIST_REMOVE(d, drive);
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gp = d->geom;
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d->geom = NULL;
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g_free(d->hdr);
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g_free(d);
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gv_save_config_all(sc);
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g_wither_geom(gp, ENXIO);
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return (err);
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}
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/*
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* This function is called from the event queue to clean up left-over subdisk
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* providers.
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*/
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static void
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gv_cleanup_pp(void *arg, int flag)
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{
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struct g_provider *pp;
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g_topology_assert();
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if (flag == EV_CANCEL)
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return;
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pp = arg;
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if (pp == NULL) {
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printf("gv_cleanup_pp: provider has gone\n");
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return;
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}
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if (!LIST_EMPTY(&pp->consumers)) {
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printf("gv_cleanup_pp: provider still not empty\n");
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return;
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}
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g_destroy_provider(pp);
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}
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static void
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gv_free_sd(struct gv_sd *s)
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{
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struct gv_drive *d;
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struct gv_freelist *fl, *fl2;
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KASSERT(s != NULL, ("gv_free_sd: NULL s"));
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d = s->drive_sc;
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KASSERT(d != NULL, ("gv_free_sd: NULL d"));
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/*
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* First, find the free slot that's immediately before or after this
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* subdisk.
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*/
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fl = NULL;
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LIST_FOREACH(fl, &d->freelist, freelist) {
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if (fl->offset == s->drive_offset + s->size)
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break;
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if (fl->offset + fl->size == s->drive_offset)
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break;
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}
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/* If there is no free slot behind this subdisk, so create one. */
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if (fl == NULL) {
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fl = g_malloc(sizeof(*fl), M_WAITOK | M_ZERO);
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fl->size = s->size;
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fl->offset = s->drive_offset;
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if (d->freelist_entries == 0) {
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LIST_INSERT_HEAD(&d->freelist, fl, freelist);
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} else {
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LIST_FOREACH(fl2, &d->freelist, freelist) {
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if (fl->offset < fl2->offset) {
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LIST_INSERT_BEFORE(fl2, fl, freelist);
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break;
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} else if (LIST_NEXT(fl2, freelist) == NULL) {
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LIST_INSERT_AFTER(fl2, fl, freelist);
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break;
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}
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}
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}
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d->freelist_entries++;
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/* Expand the free slot we just found. */
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} else {
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fl->size += s->size;
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if (fl->offset > s->drive_offset)
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fl->offset = s->drive_offset;
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}
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d->avail += s->size;
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}
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