volume_id: provide libvolume_id.a file

Signed-off-by: Kay Sievers <kay.sievers@suse.de>

1 files changed, 66 insertions, 0 deletions

diff --git a/extras/volume_id/libvolume_id/xfs.c b/extras/volume_id/libvolume_id/xfs.c
new file mode 100644
index 0000000000..a5f5d8432c
--- /dev/null
+++ b/extras/volume_id/libvolume_id/xfs.c
@@ -0,0 +1,66 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	This program is free software; you can redistribute it and/or modify it
+ *	under the terms of the GNU General Public License as published by the
+ *	Free Software Foundation version 2 of the License.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "volume_id.h"
+#include "logging.h"
+#include "util.h"
+
+struct xfs_super_block {
+	uint8_t	magic[4];
+	uint32_t	blocksize;
+	uint64_t	dblocks;
+	uint64_t	rblocks;
+	uint32_t	dummy1[2];
+	uint8_t	uuid[16];
+	uint32_t	dummy2[15];
+	uint8_t	fname[12];
+	uint32_t	dummy3[2];
+	uint64_t	icount;
+	uint64_t	ifree;
+	uint64_t	fdblocks;
+} __attribute__((__packed__));
+
+int volume_id_probe_xfs(struct volume_id *id, uint64_t off)
+{
+	struct xfs_super_block *xs;
+
+	dbg("probing at offset 0x%llx", (unsigned long long) off);
+
+	xs = (struct xfs_super_block *) volume_id_get_buffer(id, off, 0x200);
+	if (xs == NULL)
+		return -1;
+
+	if (memcmp(xs->magic, "XFSB", 4) != 0)
+		return -1;
+
+	volume_id_set_label_raw(id, xs->fname, 12);
+	volume_id_set_label_string(id, xs->fname, 12);
+	volume_id_set_uuid(id, xs->uuid, UUID_DCE);
+
+	volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
+	id->type = "xfs";
+
+	return 0;
+}