Adding upstream version 2.39.3.upstream/2.39.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 84 insertions, 0 deletions

diff --git a/libblkid/src/superblocks/romfs.c b/libblkid/src/superblocks/romfs.c
new file mode 100644
index 0000000..456cbfb
--- /dev/null
+++ b/libblkid/src/superblocks/romfs.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 1999, 2001 by Andries Brouwer
+ * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <stdint.h>
+
+#include "superblocks.h"
+
+struct romfs_super_block {
+	unsigned char	ros_magic[8];
+	uint32_t	ros_full_size;
+	uint32_t	ros_checksum;
+	unsigned char	ros_volume[16];
+} __attribute__((packed));
+
+static int romfs_verify_csum(blkid_probe pr, const struct blkid_idmag *mag,
+		const struct romfs_super_block *ros)
+{
+	uint32_t csummed_size = min((uint32_t) 512,
+			be32_to_cpu(ros->ros_full_size));
+	unsigned char *csummed;
+	uint32_t csum;
+
+	if (csummed_size % sizeof(uint32_t) != 0)
+		return 0;
+
+	csummed = blkid_probe_get_sb_buffer(pr, mag, csummed_size);
+	if (!csummed)
+		return 0;
+
+	csum = 0;
+	while (csummed_size) {
+		csum += be32_to_cpu(*(uint32_t *) csummed);
+		csummed_size -= sizeof(uint32_t);
+		csummed += sizeof(uint32_t);
+	}
+	return blkid_probe_verify_csum(pr, csum, 0);
+}
+
+static int probe_romfs(blkid_probe pr, const struct blkid_idmag *mag)
+{
+	struct romfs_super_block *ros;
+
+	ros = blkid_probe_get_sb(pr, mag, struct romfs_super_block);
+	if (!ros)
+		return errno ? -errno : 1;
+
+	if (!romfs_verify_csum(pr, mag, ros))
+		return 1;
+
+	if (*((char *) ros->ros_volume) != '\0')
+		blkid_probe_set_label(pr, ros->ros_volume,
+				sizeof(ros->ros_volume));
+
+	blkid_probe_set_fsblocksize(pr, 1024);
+	blkid_probe_set_fssize(pr, be32_to_cpu(ros->ros_full_size));
+	blkid_probe_set_block_size(pr, 1024);
+
+	return 0;
+}
+
+const struct blkid_idinfo romfs_idinfo =
+{
+	.name		= "romfs",
+	.usage		= BLKID_USAGE_FILESYSTEM,
+	.probefunc	= probe_romfs,
+	.magics		=
+	{
+		{ .magic = "-rom1fs-", .len = 8 },
+		{ NULL }
+	}
+};
+