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-rw-r--r--sys/geom/geom_vol_ffs.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/sys/geom/geom_vol_ffs.c b/sys/geom/geom_vol_ffs.c
new file mode 100644
index 000000000000..7c9a114358ef
--- /dev/null
+++ b/sys/geom/geom_vol_ffs.c
@@ -0,0 +1,146 @@
+/*-
+ * Copyright (c) 2002, 2003 Gordon Tetlow
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 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 <sys/param.h>
+#include <sys/errno.h>
+#ifndef _KERNEL
+#include <stdio.h>
+#include <string.h>
+#include <signal.h>
+#include <sys/param.h>
+#include <stdlib.h>
+#include <err.h>
+#else
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/bio.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#endif
+
+#include <ufs/ufs/dinode.h>
+#include <ufs/ffs/fs.h>
+
+#include <geom/geom.h>
+#include <geom/geom_slice.h>
+
+#define VOL_FFS_CLASS_NAME "VOL_FFS"
+
+static int superblocks[] = SBLOCKSEARCH;
+
+struct g_vol_ffs_softc {
+ char * vol;
+};
+
+static int
+g_vol_ffs_start(struct bio *bp __unused)
+{
+ return(0);
+}
+
+static struct g_geom *
+g_vol_ffs_taste(struct g_class *mp, struct g_provider *pp, int flags)
+{
+ struct g_geom *gp;
+ struct g_consumer *cp;
+ struct g_vol_ffs_softc *ms;
+ int error, sb, superblock;
+ struct fs *fs;
+
+ g_trace(G_T_TOPOLOGY, "vol_taste(%s,%s)", mp->name, pp->name);
+ g_topology_assert();
+
+ if (flags == G_TF_NORMAL &&
+ !strcmp(pp->geom->class->name, VOL_FFS_CLASS_NAME))
+ return (NULL);
+
+ gp = g_slice_new(mp, 1, pp, &cp, &ms, sizeof(*ms), g_vol_ffs_start);
+ if (gp == NULL)
+ return (NULL);
+ g_topology_unlock();
+ /*
+ * Walk through the standard places that superblocks hide and look
+ * for UFS magic. If we find magic, then check that the size in the
+ * superblock corresponds to the size of the underlying provider.
+ * Finally, look for a volume label and create an appropriate /dev
+ * entry based on that.
+ */
+ for (sb=0; (superblock = superblocks[sb]) != -1; sb++) {
+ fs = (struct fs *) g_read_data(cp, superblock,
+ SBLOCKSIZE, &error);
+ if (fs == NULL || error != 0)
+ continue;
+ /* Check for magic and make sure things are the right size */
+ if (fs->fs_magic == FS_UFS1_MAGIC) {
+ if (fs->fs_old_size * fs->fs_fsize !=
+ (int32_t) pp->mediasize) {
+ g_free(fs);
+ continue;
+ }
+ } else if (fs->fs_magic == FS_UFS2_MAGIC) {
+ if (fs->fs_size * fs->fs_fsize !=
+ (int64_t) pp->mediasize) {
+ g_free(fs);
+ continue;
+ }
+ } else {
+ g_free(fs);
+ continue;
+ }
+ /* Check for volume label */
+ if (fs->fs_volname[0] == '\0') {
+ g_free(fs);
+ continue;
+ }
+ g_topology_lock();
+ /* Alright, we have a label and a volume name, reconfig. */
+ g_slice_config(gp, 0, G_SLICE_CONFIG_SET, (off_t) 0,
+ pp->mediasize, pp->sectorsize, "vol/%s",
+ fs->fs_volname);
+ g_free(fs);
+ g_topology_unlock();
+ break;
+ }
+ g_topology_lock();
+ g_access_rel(cp, -1, 0, 0);
+ if (LIST_EMPTY(&gp->provider)) {
+ g_std_spoiled(cp);
+ return (NULL);
+ }
+ return (gp);
+}
+
+static struct g_class g_vol_ffs_class = {
+ VOL_FFS_CLASS_NAME,
+ g_vol_ffs_taste,
+ NULL,
+ G_CLASS_INITIALIZER
+};
+
+DECLARE_GEOM_CLASS(g_vol_ffs_class, g_vol_ffs);