volume_id: support sub-uuid's and plug in btrfs device uuid

6 files changed, 51 insertions, 17 deletions

diff --git a/extras/volume_id/lib/btrfs.c b/extras/volume_id/lib/btrfs.c
index 09b03a68dc..5ef979f2f0 100644
--- a/extras/volume_id/lib/btrfs.c
+++ b/extras/volume_id/lib/btrfs.c
@@ -93,6 +93,7 @@ int volume_id_probe_btrfs(struct volume_id *id, uint64_t off, uint64_t size)
 	if (memcmp(bfs->magic, "_BHRfS_M", 8) != 0)
 		return -1;
 	volume_id_set_uuid(id, bfs->fsid, 0, UUID_DCE);
+	volume_id_set_uuid_sub(id, bfs->dev_item.uuid, 0, UUID_DCE);
 	volume_id_set_label_raw(id, bfs->label, 256);
 	volume_id_set_label_string(id, bfs->label, 256);
 	volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
diff --git a/extras/volume_id/lib/exported_symbols b/extras/volume_id/lib/exported_symbols
index d3b925c683..215a267dad 100644
--- a/extras/volume_id/lib/exported_symbols
+++ b/extras/volume_id/lib/exported_symbols
@@ -3,6 +3,7 @@ volume_id_get_label
 volume_id_get_label_raw
 volume_id_get_uuid
 volume_id_get_uuid_raw
+volume_id_get_uuid_sub
 volume_id_get_usage
 volume_id_get_type
 volume_id_get_type_version
diff --git a/extras/volume_id/lib/libvolume_id-private.h b/extras/volume_id/lib/libvolume_id-private.h
index 8a5c327aea..046a1e39ed 100644
--- a/extras/volume_id/lib/libvolume_id-private.h
+++ b/extras/volume_id/lib/libvolume_id-private.h
@@ -107,6 +107,9 @@ struct volume_id {
 	uint8_t		uuid_raw[VOLUME_ID_UUID_SIZE];
 	size_t		uuid_raw_len;
 	char		uuid[VOLUME_ID_UUID_SIZE+1];
+	uint8_t		uuid_sub_raw[VOLUME_ID_UUID_SIZE];
+	size_t		uuid_sub_raw_len;
+	char		uuid_sub[VOLUME_ID_UUID_SIZE+1];
 	enum		volume_id_usage usage_id;
 	char		*usage;
 	char		*type;
@@ -129,6 +132,7 @@ extern void volume_id_set_label_raw(struct volume_id *id, const uint8_t *buf, si
 extern void volume_id_set_label_string(struct volume_id *id, const uint8_t *buf, size_t count);
 extern void volume_id_set_label_unicode16(struct volume_id *id, const uint8_t *buf, enum endian endianess, size_t count);
 extern void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, size_t len, enum uuid_format format);
+extern void volume_id_set_uuid_sub(struct volume_id *id, const uint8_t *buf, size_t len, enum uuid_format format);
 extern uint8_t *volume_id_get_buffer(struct volume_id *id, uint64_t off, size_t len);
 extern void volume_id_free_buffer(struct volume_id *id);
 
diff --git a/extras/volume_id/lib/libvolume_id.h b/extras/volume_id/lib/libvolume_id.h
index e830504697..24c9c4e7eb 100644
--- a/extras/volume_id/lib/libvolume_id.h
+++ b/extras/volume_id/lib/libvolume_id.h
@@ -45,6 +45,7 @@ extern void volume_id_all_probers(all_probers_fn_t all_probers_fn,
 extern int volume_id_get_label(struct volume_id *id, const char **label);
 extern int volume_id_get_label_raw(struct volume_id *id, const uint8_t **label, size_t *len);
 extern int volume_id_get_uuid(struct volume_id *id, const char **uuid);
+extern int volume_id_get_uuid_sub(struct volume_id *id, const char **uuid);
 extern int volume_id_get_uuid_raw(struct volume_id *id, const uint8_t **uuid, size_t *len);
 extern int volume_id_get_usage(struct volume_id *id, const char **usage);
 extern int volume_id_get_type(struct volume_id *id, const char **type);
diff --git a/extras/volume_id/lib/util.c b/extras/volume_id/lib/util.c
index 9844e5e97c..ea5ff16e91 100644
--- a/extras/volume_id/lib/util.c
+++ b/extras/volume_id/lib/util.c
@@ -250,14 +250,12 @@ void volume_id_set_label_unicode16(struct volume_id *id, const uint8_t *buf, enu
 	 volume_id_set_unicode16((uint8_t *)id->label, sizeof(id->label), buf, endianess, count);
 }
 
-void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, size_t len, enum uuid_format format)
+static void set_uuid(const uint8_t *buf, size_t len, enum uuid_format format,
+		     char *uuid, uint8_t *uuid_raw, size_t *uuid_raw_len)
 {
 	unsigned int i;
 	unsigned int count = 0;
 
-	if (len > sizeof(id->uuid_raw))
-		len = sizeof(id->uuid_raw);
-
 	switch(format) {
 	case UUID_STRING:
 		count = len;
@@ -281,8 +279,8 @@ void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, size_t len, en
 		count = 32;
 		break;
 	}
-	memcpy(id->uuid_raw, buf, count);
-	id->uuid_raw_len = count;
+	memcpy(uuid_raw, buf, count);
+	*uuid_raw_len = count;
 
 	/* if set, create string in the same format, the native platform uses */
 	for (i = 0; i < count; i++)
@@ -293,16 +291,16 @@ void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, size_t len, en
 set:
 	switch(format) {
 	case UUID_DOS:
-		sprintf(id->uuid, "%02X%02X-%02X%02X",
+		sprintf(uuid, "%02X%02X-%02X%02X",
 			buf[3], buf[2], buf[1], buf[0]);
 		break;
 	case UUID_64BIT_LE:
-		sprintf(id->uuid,"%02X%02X%02X%02X%02X%02X%02X%02X",
+		sprintf(uuid,"%02X%02X%02X%02X%02X%02X%02X%02X",
 			buf[7], buf[6], buf[5], buf[4],
 			buf[3], buf[2], buf[1], buf[0]);
 		break;
 	case UUID_DCE:
-		sprintf(id->uuid,
+		sprintf(uuid,
 			"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 			buf[0], buf[1], buf[2], buf[3],
 			buf[4], buf[5],
@@ -312,18 +310,18 @@ set:
 		break;
 	case UUID_HEX_STRING:
 		/* translate A..F to a..f */
-		memcpy(id->uuid, buf, count);
+		memcpy(uuid, buf, count);
 		for (i = 0; i < count; i++)
-			if (id->uuid[i] >= 'A' && id->uuid[i] <= 'F')
-				id->uuid[i] = (id->uuid[i] - 'A') + 'a';
-		id->uuid[count] = '\0';
+			if (uuid[i] >= 'A' && uuid[i] <= 'F')
+				uuid[i] = (uuid[i] - 'A') + 'a';
+		uuid[count] = '\0';
 		break;
 	case UUID_STRING:
-		memcpy(id->uuid, buf, count);
-		id->uuid[count] = '\0';
+		memcpy(uuid, buf, count);
+		uuid[count] = '\0';
 		break;
 	case UUID_MD:
-		sprintf(id->uuid,
+		sprintf(uuid,
 			"%02x%02x%02x%02x:%02x%02x%02x%02x:%02x%02x%02x%02x:%02x%02x%02x%02x",
 			buf[0], buf[1], buf[2], buf[3],
 			buf[4], buf[5], buf[6], buf[7],
@@ -331,7 +329,7 @@ set:
 			buf[12], buf[13], buf[14],buf[15]);
 		break;
 	case UUID_LVM:
-		sprintf(id->uuid,
+		sprintf(uuid,
 			"%c%c%c%c%c%c-%c%c%c%c-%c%c%c%c-%c%c%c%c-%c%c%c%c-%c%c%c%c-%c%c%c%c%c%c",
 			buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
 			buf[6], buf[7], buf[8], buf[9],
@@ -344,6 +342,22 @@ set:
 	}
 }
 
+void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, size_t len, enum uuid_format format)
+{
+	if (len > sizeof(id->uuid_raw))
+		len = sizeof(id->uuid_raw);
+
+	set_uuid(buf, len, format, id->uuid, id->uuid_raw, &id->uuid_raw_len);
+}
+
+void volume_id_set_uuid_sub(struct volume_id *id, const uint8_t *buf, size_t len, enum uuid_format format)
+{
+	if (len > sizeof(id->uuid_sub_raw))
+		len = sizeof(id->uuid_sub_raw);
+
+	set_uuid(buf, len, format, id->uuid_sub, id->uuid_sub_raw, &id->uuid_sub_raw_len);
+}
+
 uint8_t *volume_id_get_buffer(struct volume_id *id, uint64_t off, size_t len)
 {
 	ssize_t buf_len;
diff --git a/extras/volume_id/lib/volume_id.c b/extras/volume_id/lib/volume_id.c
index 8bbbc38c32..48bfd88624 100644
--- a/extras/volume_id/lib/volume_id.c
+++ b/extras/volume_id/lib/volume_id.c
@@ -219,6 +219,19 @@ int volume_id_get_uuid_raw(struct volume_id *id, const uint8_t **uuid, size_t *l
 	return 1;
 }
 
+int volume_id_get_uuid_sub(struct volume_id *id, const char **uuid)
+{
+	if (id == NULL)
+		return 0;
+	if (uuid == NULL)
+		return 0;
+	if (id->usage_id == VOLUME_ID_UNUSED)
+		return 0;
+
+	*uuid = id->uuid_sub;
+	return 1;
+}
+
 /**
  * volume_id_get_usage:
  * @id: Probing context.