1 files changed, 97 insertions, 0 deletions
diff --git a/sys/geom/label/g_label.h b/sys/geom/label/g_label.h
new file mode 100644
index 0000000..011cc5e
--- /dev/null
+++ b/sys/geom/label/g_label.h
@@ -0,0 +1,97 @@
+/*-
+ * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * 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 AUTHORS 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 AUTHORS 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_G_LABEL_H_
+#define	_G_LABEL_H_
+
+#include <sys/endian.h>
+
+#define	G_LABEL_CLASS_NAME	"LABEL"
+
+#define	G_LABEL_MAGIC		"GEOM::LABEL"
+#define	G_LABEL_VERSION		0
+#define	G_LABEL_DIR		"label"
+
+#ifdef _KERNEL
+extern u_int g_label_debug;
+
+#define	G_LABEL_DEBUG(lvl, ...)	do {					\
+	if (g_label_debug >= (lvl)) {					\
+		printf("GEOM_LABEL");					\
+		if (g_label_debug > 0)					\
+			printf("[%u]", lvl);				\
+		printf(": ");						\
+		printf(__VA_ARGS__);					\
+		printf("\n");						\
+	}								\
+} while (0)
+#define	G_LABEL_LOGREQ(bp, ...)	do {					\
+	if (g_label_debug >= 2) {					\
+		printf("GEOM_LABEL[2]: ");				\
+		printf(__VA_ARGS__);					\
+		printf(" ");						\
+		g_print_bio(bp);					\
+		printf("\n");						\
+	}								\
+} while (0)
+
+typedef void g_label_taste_t (struct g_consumer *cp, char *label, size_t size);
+
+struct g_label_desc {
+	g_label_taste_t	*ld_taste;
+	char		*ld_dir;
+};
+
+/* Supported labels. */
+extern const struct g_label_desc g_label_ufs;
+extern const struct g_label_desc g_label_iso9660;
+extern const struct g_label_desc g_label_msdosfs;
+#endif	/* _KERNEL */
+
+struct g_label_metadata {
+	char		md_magic[16];	/* Magic value. */
+	uint32_t	md_version;	/* Version number. */
+	char		md_label[16];	/* Label. */
+};
+static __inline void
+label_metadata_encode(const struct g_label_metadata *md, u_char *data)
+{
+
+	bcopy(md->md_magic, data, sizeof(md->md_magic));
+	le32enc(data + 16, md->md_version);
+	bcopy(md->md_label, data + 20, sizeof(md->md_label));
+}
+static __inline void
+label_metadata_decode(const u_char *data, struct g_label_metadata *md)
+{
+
+	bcopy(data, md->md_magic, sizeof(md->md_magic));
+	md->md_version = le32dec(data + 16);
+	bcopy(data + 20, md->md_label, sizeof(md->md_label));
+}
+#endif	/* _G_LABEL_H_ */