machined: support non-btrfs file systems with "machinectl clone"

Fall back to a normal copy operation when the backing file system isn't btrfs,
and hence doesn't support cheap snapshotting. Of course, this will be slow, but
given that the execution is asynchronous now, this should be OK.

Fixes: #1308

diff --git a/src/basic/copy.c b/src/basic/copy.c
index 24d109f487b9138932ea41707cf8dd6b13fac0fb..c2c0579c89842848ed49916e93f9669dd2669b7a 100644 (file)
--- a/src/basic/copy.c
+++ b/src/basic/copy.c
@@ -385,6 +385,21 @@ int copy_directory_fd(int dirfd, const char *to, bool merge) {
         return fd_copy_directory(dirfd, NULL, &st, AT_FDCWD, to, st.st_dev, merge);
 }
 
+int copy_directory(const char *from, const char *to, bool merge) {
+        struct stat st;
+
+        assert(from);
+        assert(to);
+
+        if (lstat(from, &st) < 0)
+                return -errno;
+
+        if (!S_ISDIR(st.st_mode))
+                return -ENOTDIR;
+
+        return fd_copy_directory(AT_FDCWD, from, &st, AT_FDCWD, to, st.st_dev, merge);
+}
+
 int copy_file_fd(const char *from, int fdt, bool try_reflink) {
         _cleanup_close_ int fdf = -1;
         int r;