fs: allow to mount on subdirectories

Since get_mtab_entry_by_path() is a bit more flexible now
we no longer have to force the user to mount on the root
directory only. Instead, we can allow to mount on subdirectories
aswell. Nested mounts are still not possible though.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 7 insertions, 6 deletions

diff --git a/fs/fs.c b/fs/fs.c
index 637a01f8c5..3923ec67bb 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -778,13 +778,14 @@ int mount(const char *device, const char *fsname, const char *_path)
 
 	debug("mount: %s on %s type %s\n", device, path, fsname);
 
-	if (strchr(path + 1, '/')) {
-		printf("mounting allowed on first directory level only\n");
-		errno = -EBUSY;
-		goto err_free_path;
-	}
-
 	if (mtab_root) {
+		struct mtab_entry *entry;
+		entry = get_mtab_entry_by_path(path);
+		if (entry != mtab_root) {
+			printf("sorry, no nested mounts\n");
+			errno = -EBUSY;
+			goto err_free_path;
+		}
 		if (path_check_prereq(path, S_IFDIR))
 			goto err_free_path;
 	} else {