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-rw-r--r--sys/geom/geom_disk.c232
1 files changed, 232 insertions, 0 deletions
diff --git a/sys/geom/geom_disk.c b/sys/geom/geom_disk.c
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+++ b/sys/geom/geom_disk.c
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+/*-
+ * Copyright (c) 2002 Poul-Henning Kamp
+ * Copyright (c) 2002 Networks Associates Technology, Inc.
+ * All rights reserved.
+ *
+ * This software was developed for the FreeBSD Project by Poul-Henning Kamp
+ * and NAI Labs, the Security Research Division of Network Associates, Inc.
+ * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
+ * DARPA CHATS research program.
+ *
+ * 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.
+ * 3. The names of the authors may not be used to endorse or promote
+ * products derived from this software without specific prior written
+ * permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE 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 THE 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.
+ *
+ * $FreeBSD$
+ */
+
+#include "opt_geom.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+#include <sys/bio.h>
+#include <sys/conf.h>
+#include <sys/disk.h>
+#include <sys/malloc.h>
+#include <sys/sysctl.h>
+#include <machine/md_var.h>
+#include <sys/ctype.h>
+
+
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <geom/geom.h>
+
+static g_access_t g_disk_access;
+
+struct g_method g_disk_method = {
+ "DISK-method",
+ NULL,
+ g_disk_access,
+ NULL,
+ NULL,
+ { 0, 0 },
+ { 0 }
+};
+
+static int
+g_disk_access(struct g_provider *pp, int r, int w, int e)
+{
+ struct disk *dp;
+ dev_t dev;
+ int error;
+
+ g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)",
+ pp->name, r, w, e);
+ g_topology_assert();
+ r += pp->acr;
+ w += pp->acw;
+ e += pp->ace;
+ dp = pp->geom->softc;
+ dev = dp->d_dev;
+ if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) {
+ mtx_lock(&Giant);
+ error = devsw(dev)->d_open(dev, 3, 0, NULL);
+ if (error != 0)
+ printf("Opened disk %s -> %d\n", pp->name, error);
+ mtx_unlock(&Giant);
+ } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) {
+ mtx_lock(&Giant);
+ error = devsw(dev)->d_close(dev, 3, 0, NULL);
+ if (error != 0)
+ printf("Closed disk %s -> %d\n", pp->name, error);
+ mtx_unlock(&Giant);
+ } else {
+ error = 0;
+ }
+ return (error);
+}
+
+static void
+g_disk_done(struct bio *bp)
+{
+
+ mtx_unlock(&Giant);
+ bp->bio_completed = bp->bio_length - bp->bio_resid;
+ g_std_done(bp);
+ mtx_lock(&Giant);
+}
+
+static void
+g_disk_start(struct bio *bp)
+{
+ struct bio *bp2;
+ dev_t dev;
+ struct disk *dp;
+
+ dp = bp->bio_to->geom->softc;
+ dev = dp->d_dev;
+ switch(bp->bio_cmd) {
+ case BIO_READ:
+ case BIO_WRITE:
+ bp2 = g_clone_bio(bp);
+ bp2->bio_done = g_disk_done;
+ bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT;
+ bp2->bio_pblkno = bp2->bio_blkno;
+ bp2->bio_bcount = bp2->bio_length;
+ bp2->bio_dev = dev;
+ mtx_lock(&Giant);
+ devsw(dev)->d_strategy(bp2);
+ mtx_unlock(&Giant);
+ break;
+ case BIO_GETATTR:
+ if (g_haveattr_int(bp, "GEOM::sectorsize",
+ dp->d_label.d_secsize))
+ return;
+ if (g_haveattr_int(bp, "GEOM::fwsectors",
+ dp->d_label.d_nsectors))
+ return;
+ if (g_haveattr_int(bp, "GEOM::fwheads",
+ dp->d_label.d_ntracks))
+ return;
+ if (g_haveattr_int(bp, "GEOM::fwcylinders",
+ dp->d_label.d_ncylinders))
+ return;
+ if (g_haveattr_off_t(bp, "GEOM::mediasize",
+ dp->d_label.d_secsize * (off_t)dp->d_label.d_secperunit))
+ return;
+ bp->bio_error = ENOIOCTL;
+ g_io_deliver(bp);
+ return;
+ default:
+ bp->bio_error = EOPNOTSUPP;
+ g_io_deliver(bp);
+ return;
+ }
+}
+
+dev_t
+disk_create(int unit, struct disk *dp, int flags, struct cdevsw *cdevsw, struct cdevsw *proto)
+{
+ static int once;
+ struct g_geom *gp;
+ struct g_provider *pp;
+ dev_t dev;
+
+ mtx_unlock(&Giant);
+ if (!once) {
+ g_add_method(&g_disk_method);
+ once++;
+ }
+ dev = g_malloc(sizeof *dev, M_WAITOK | M_ZERO);
+ dp->d_dev = dev;
+ dev->si_devsw = cdevsw;
+ dev->si_disk = dp;
+ dev->si_udev = dkmakeminor(unit, WHOLE_DISK_SLICE, RAW_PART);
+ g_topology_lock();
+ gp = g_new_geomf(&g_disk_method, "%s%d", cdevsw->d_name, unit);
+ gp->start = g_disk_start;
+ gp->softc = dp;
+ dp->d_softc = gp;
+ pp = g_new_providerf(gp, "%s", gp->name);
+ g_error_provider(pp, 0);
+ g_topology_unlock();
+ mtx_lock(&Giant);
+ return (dev);
+}
+
+void disk_dev_synth(dev_t dev);
+
+void
+disk_dev_synth(dev_t dev)
+{
+
+ return;
+}
+
+void
+disk_destroy(dev_t dev)
+{
+ struct disk *dp;
+ struct g_geom *gp;
+
+ dp = dev->si_disk;
+ gp = dp->d_softc;
+ g_free(dev);
+ gp->flags |= G_GEOM_WITHER;
+ g_orphan_provider(LIST_FIRST(&gp->provider), ENXIO);
+}
+
+void
+disk_invalidate (struct disk *disk)
+{
+}
+
+int
+disk_dumpcheck(dev_t dev, u_int *count, u_int *blkno, u_int *secsize)
+{
+
+ return (ENXIO);
+}
+
+
+SYSCTL_INT(_debug_sizeof, OID_AUTO, disklabel, CTLFLAG_RD,
+ 0, sizeof(struct disklabel), "sizeof(struct disklabel)");
+
+SYSCTL_INT(_debug_sizeof, OID_AUTO, diskslices, CTLFLAG_RD,
+ 0, sizeof(struct diskslices), "sizeof(struct diskslices)");
+
+SYSCTL_INT(_debug_sizeof, OID_AUTO, disk, CTLFLAG_RD,
+ 0, sizeof(struct disk), "sizeof(struct disk)");
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