From: Baptiste Daroussin <bapt@FreeBSD.org>
Date: Fri, 7 Apr 2023 12:47:30 +0000 (+0200)
Subject: copy_file_range: deal with EXDEV
X-Git-Tag: RELEASE_1_4_0b1~66
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0d599170a067b30741c98ebb8c8d2988d195b028;p=thirdparty%2Fmlmmj.git

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 542f82d3..61015607 100644
--- 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;
 			}