Nuke geom_mirror class. New geom_mirror class is in the way.
Approved by: phk
This commit is contained in:
pjd
parent
0560d38991
commit
6e57ee9a4c
@ -963,7 +963,6 @@ geom/geom_io.c standard
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geom/geom_kern.c standard
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geom/geom_mbr.c optional geom_mbr
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geom/geom_mbr_enc.c optional geom_mbr
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geom/geom_mirror.c optional geom_mirror
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geom/geom_pc98.c optional geom_pc98
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geom/geom_pc98_enc.c optional geom_pc98
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geom/geom_slice.c standard
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@ -1,239 +0,0 @@
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/*-
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* Copyright (c) 2003 Poul-Henning Kamp
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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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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE 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 THE 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/bio.h>
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/libkern.h>
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#include <sys/endian.h>
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#include <sys/md5.h>
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#include <sys/errno.h>
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#include <geom/geom.h>
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#define MIRROR_MAGIC "GEOM::MIRROR"
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struct g_mirror_softc {
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off_t mediasize;
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u_int sectorsize;
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u_char magic[16];
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};
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static int
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g_mirror_add(struct g_geom *gp, struct g_provider *pp)
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{
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struct g_consumer *cp;
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g_trace(G_T_TOPOLOGY, "g_mirror_add(%s, %s)", gp->name, pp->name);
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g_topology_assert();
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cp = g_new_consumer(gp);
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g_attach(cp, pp);
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return (0);
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}
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static void
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g_mirror_orphan(struct g_consumer *cp)
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{
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struct g_geom *gp;
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int error;
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g_topology_assert();
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gp = cp->geom;
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g_access(cp, -cp->acr, -cp->acw, -cp->ace);
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error = cp->provider->error;
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g_detach(cp);
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g_destroy_consumer(cp);
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if (!LIST_EMPTY(&gp->consumer))
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return;
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g_free(gp->softc);
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g_wither_geom(gp, error);
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}
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static void
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g_mirror_done(struct bio *bp)
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{
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struct g_geom *gp;
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struct g_mirror_softc *sc;
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struct g_consumer *cp;
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gp = bp->bio_to->geom;
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sc = gp->softc;
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cp = LIST_NEXT(bp->bio_from, consumer);
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if (cp == NULL)
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g_std_done(bp);
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else
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g_io_request(bp, cp);
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}
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static void
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g_mirror_start(struct bio *bp)
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{
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struct g_geom *gp;
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struct bio *bp2;
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struct g_mirror_softc *sc;
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gp = bp->bio_to->geom;
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sc = gp->softc;
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switch(bp->bio_cmd) {
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case BIO_READ:
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case BIO_WRITE:
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case BIO_DELETE:
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bp2 = g_clone_bio(bp);
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if (bp2 == NULL) {
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g_io_deliver(bp, ENOMEM);
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return;
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}
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bp2->bio_offset += sc->sectorsize;
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if (bp->bio_cmd == BIO_READ)
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bp2->bio_done = g_std_done;
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else
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bp2->bio_done = g_mirror_done;
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g_io_request(bp2, LIST_FIRST(&gp->consumer));
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return;
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default:
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g_io_deliver(bp, EOPNOTSUPP);
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return;
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}
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}
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static int
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g_mirror_access(struct g_provider *pp, int dr, int dw, int de)
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{
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struct g_geom *gp;
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struct g_consumer *cp1, *cp2;
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int error;
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de += dr;
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de += dw;
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gp = pp->geom;
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error = ENXIO;
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LIST_FOREACH(cp1, &gp->consumer, consumer) {
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error = g_access(cp1, dr, dw, de);
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if (error) {
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LIST_FOREACH(cp2, &gp->consumer, consumer) {
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if (cp2 == cp1)
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break;
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g_access(cp2, -dr, -dw, -de);
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}
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return (error);
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}
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}
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return (error);
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}
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static struct g_geom *
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g_mirror_taste(struct g_class *mp, struct g_provider *pp, int flags __unused)
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{
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struct g_geom *gp, *gp2;
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struct g_provider *pp2;
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struct g_consumer *cp;
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struct g_mirror_softc *sc;
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int error;
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u_int sectorsize;
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u_char *buf;
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g_trace(G_T_TOPOLOGY, "mirror_taste(%s, %s)", mp->name, pp->name);
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g_topology_assert();
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gp = g_new_geomf(mp, "%s.mirror", pp->name);
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gp->start = g_mirror_start;
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gp->spoiled = g_mirror_orphan;
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gp->orphan = g_mirror_orphan;
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gp->access= g_mirror_access;
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cp = g_new_consumer(gp);
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g_attach(cp, pp);
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error = g_access(cp, 1, 0, 0);
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if (error) {
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g_detach(cp);
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g_destroy_consumer(cp);
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g_destroy_geom(gp);
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return(NULL);
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}
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g_topology_unlock();
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do {
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sectorsize = cp->provider->sectorsize;
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buf = g_read_data(cp, 0, sectorsize, &error);
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if (buf == NULL || error != 0)
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break;
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if (memcmp(buf, MIRROR_MAGIC, strlen(MIRROR_MAGIC)))
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break;
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LIST_FOREACH(gp2, &mp->geom, geom) {
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sc = gp2->softc;
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if (sc == NULL)
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continue;
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if (memcmp(buf + 16, sc->magic, sizeof sc->magic))
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continue;
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break;
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}
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/* We found somebody else */
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if (gp2 != NULL) {
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g_topology_lock();
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g_mirror_add(gp2, pp);
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g_topology_unlock();
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break;
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}
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gp->softc = g_malloc(sizeof(struct g_mirror_softc), M_WAITOK);
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sc = gp->softc;
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memcpy(sc->magic, buf + 16, sizeof sc->magic);
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g_topology_lock();
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pp2 = g_new_providerf(gp, "%s", gp->name);
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pp2->mediasize = sc->mediasize = pp->mediasize - pp->sectorsize;
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pp2->sectorsize = sc->sectorsize = pp->sectorsize;
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g_error_provider(pp2, 0);
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g_topology_unlock();
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} while (0);
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g_topology_lock();
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if (buf != NULL)
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g_free(buf);
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g_access(cp, -1, 0, 0);
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if (gp->softc != NULL)
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return (gp);
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g_detach(cp);
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g_destroy_consumer(cp);
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g_destroy_geom(gp);
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return (NULL);
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}
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#define MIRROR_CLASS_NAME "MIRROR"
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static struct g_class g_mirror_class = {
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.name = MIRROR_CLASS_NAME,
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.taste = g_mirror_taste,
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};
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DECLARE_GEOM_CLASS(g_mirror_class, g_mirror);
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