copy_file_range: deal with EXDEV

in theory it is never supposed to happen, in practice it happened
on some version of the linux kernel.

diff --git a/src/dumpfd2fd.c b/src/dumpfd2fd.c
index 542f82d3b6b217a134b116d28f4d649b6a0b10e2..61015607a62c80e4df2f27a56d632a0e8d6c8792 100644 (file)
--- a/src/dumpfd2fd.c
+++ b/src/dumpfd2fd.c
@@ -62,7 +62,7 @@ int dumpfd2fd(int from, int to)
 #ifdef HAVE_COPY_FILE_RANGE
                if (cfr) {
                        r = copy_file_range(from, NULL, to, NULL, SSIZE_MAX, 0);
-                       if (r < 0 && errno == EINVAL) {
+                       if (r < 0 && (errno == EINVAL || errno == EXDEV)) {
                                /* probably a non seekable FD */
                                cfr = false;
                        }