1 files changed, 67 insertions, 0 deletions
diff --git a/probe-bcache.c b/probe-bcache.c
new file mode 100644
index 0000000..ec81ea7
--- /dev/null
+++ b/probe-bcache.c
@@ -0,0 +1,67 @@
+#define _FILE_OFFSET_BITS	64
+#define __USE_FILE_OFFSET64
+#define _XOPEN_SOURCE 500
+
+#include <fcntl.h>
+#include <linux/fs.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <uuid/uuid.h>
+
+#include "bcache.h"
+
+int main(int argc, char **argv)
+{
+	bool udev = false;
+	int i, o;
+	extern char *optarg;
+	struct cache_sb sb;
+	char uuid[40];
+
+	while ((o = getopt(argc, argv, "o:")) != EOF)
+		switch (o) {
+		case 'o':
+			if (strcmp("udev", optarg)) {
+				printf("Invalid output format %s\n", optarg);
+				exit(EXIT_FAILURE);
+			}
+			udev = true;
+			break;
+		}
+
+
+	argv += optind;
+	argc -= optind;
+
+	for (i = 0; i < argc; i++) {
+		int fd = open(argv[i], O_RDONLY);
+		if (fd == -1)
+			continue;
+
+
+		if (pread(fd, &sb, sizeof(sb), 4096) != sizeof(sb))
+			continue;
+
+		if (memcmp(sb.magic, bcache_magic, 16))
+			continue;
+
+		uuid_unparse(sb.uuid, uuid);
+
+		if (udev)
+			printf("ID_FS_UUID=%s\n"
+			       "ID_FS_UUID_ENC=%s\n"
+			       "ID_FS_TYPE=bcache\n",
+			       uuid, uuid);
+		else
+			printf("%s: UUID=\"\" TYPE=\"bcache\"\n", uuid);
+	}
+
+	return 0;
+}