overlay: adapt to new config rootfs parser

src/lxc/lxccontainer.c

@@ -4054,8 +4054,8 @@ static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snap
 
 	if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs"))
 		flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE;
-	rest = lxcapi_clone(snap, newname, c->config_path, flags,
-			bdev->type, NULL, 0, NULL);
+	rest = lxcapi_clone(snap, newname, c->config_path, flags, bdev->type,
+			    NULL, 0, NULL);
 	storage_put(bdev);
 	if (rest && lxcapi_is_defined(rest))
 		b = true;

src/lxc/storage/overlay.c

@@ -199,12 +199,11 @@ int ovl_clonepaths(struct lxc_storage *orig, struct lxc_storage *new, const char
 			return -22;
 		}
 
-		nsrc = strchr(osrc, ':') + 1;
-		if ((nsrc != osrc + 8) && (nsrc != osrc + 10)) {
-			ERROR("Detected \":\" in \"%s\" at wrong position", osrc);
-			free(osrc);
-			return -22;
-		}
+		nsrc = osrc;
+		if (strncmp(osrc, "overlay:", 8) == 0)
+			nsrc += 8;
+		else if (strncmp(osrc, "overlayfs:", 10) == 0)
+			nsrc += 10;
 
 		odelta = strchr(nsrc, ':');
 		if (!odelta) {
@@ -457,22 +456,17 @@ int ovl_create(struct lxc_storage *bdev, const char *dest, const char *n,
 
 int ovl_destroy(struct lxc_storage *orig)
 {
-	bool ovl;
 	char *upper = orig->src;
 
-	ovl = !strncmp(upper, "overlay:", 8);
-	if (!ovl && strncmp(upper, "overlayfs:", 10))
-		return -22;
-
 	/* For an overlay container the rootfs is considered immutable
 	 * and cannot be removed when restoring from a snapshot.
 	 */
 	if (orig->flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)
 		return 0;
 
-	if (ovl)
+	if (strncmp(upper, "overlay:", 8) == 0)
 		upper += 8;
-	else
+	else if (strncmp(upper, "overlayfs:", 10) == 0)
 		upper += 10;
 
 	upper = strchr(upper, ':');
@@ -485,10 +479,10 @@ int ovl_destroy(struct lxc_storage *orig)
 
 bool ovl_detect(const char *path)
 {
-	if (!strncmp(path, "overlayfs:", 10))
+	if (!strncmp(path, "overlay:", 8))
 		return true;
 
-	if (!strncmp(path, "overlay:", 8))
+	if (!strncmp(path, "overlayfs:", 10))
 		return true;
 
 	return false;
@@ -521,18 +515,19 @@ int ovl_mount(struct lxc_storage *bdev)
 		ERROR("Failed to allocate memory");
 		return -1;
 	}
+	upper = dup;
+	lower = dup;
 
-	/* support multiple lower layers */
-	lower = strstr(dup, ":/");
-	if (!lower) {
-		ERROR("Failed to detect \":/\" in string \"%s\"", dup);
-		free(dup);
-		return -22;
-	}
+	if (strncmp(dup, "overlay:", 8) == 0)
+		lower += 8;
+	else if (strncmp(dup, "overlayfs:", 10) == 0)
+		lower += 10;
+	if (upper != lower)
+		upper = lower;
 
-	lower++;
-	upper = lower;
-	while ((tmp = strstr(++upper, ":/"))) {
+	/* support multiple lower layers */
+	while ((tmp = strstr(upper, ":/"))) {
+		tmp++;
 		upper = tmp;
 	}
 

src/lxc/storage/storage.c

@@ -268,10 +268,9 @@ struct lxc_storage *storage_get(const char *type)
 	size_t i;
 	struct lxc_storage *bdev;
 
-	for (i = 0; i < numbdevs; i++) {
+	for (i = 0; i < numbdevs; i++)
 		if (strcmp(bdevs[i].name, type) == 0)
 			break;
-	}
 
 	if (i == numbdevs)
 		return NULL;
@@ -284,7 +283,7 @@ struct lxc_storage *storage_get(const char *type)
 	bdev->ops = bdevs[i].ops;
 	bdev->type = bdevs[i].name;
 
-	if (!strcmp(bdev->type, "aufs"))
+	if (strcmp(bdev->type, "aufs") == 0)
 		WARN("The \"aufs\" driver will is deprecated and will soon be "
 		     "removed. For similar functionality see the \"overlay\" "
 		     "storage driver");
@@ -296,7 +295,7 @@ static struct lxc_storage *do_storage_create(const char *dest, const char *type,
 					     const char *cname,
 					     struct bdev_specs *specs)
 {
-
+	int ret;
 	struct lxc_storage *bdev;
 
 	if (!type)
@@ -306,7 +305,8 @@ static struct lxc_storage *do_storage_create(const char *dest, const char *type,
 	if (!bdev)
 		return NULL;
 
-	if (bdev->ops->create(bdev, dest, cname, specs) < 0) {
+	ret = bdev->ops->create(bdev, dest, cname, specs);
+	if (ret < 0) {
 		storage_put(bdev);
 		return NULL;
 	}