From c0301fcc811432a587f6f94fee08d7965c1671d0 Mon Sep 17 00:00:00 2001 From: Eric Blake Date: Tue, 5 Apr 2016 21:35:02 -0600 Subject: nbd: Return correct error for write to read-only export The NBD Protocol requires that servers should send EPERM for attempts to write (or trim) a read-only export. We were correct for TRIM (blk_co_discard() gave EPERM); but were manually setting EROFS which then got mapped to EINVAL over the wire on writes. Signed-off-by: Eric Blake Message-Id: <1459913704-19949-2-git-send-email-eblake@redhat.com> Signed-off-by: Paolo Bonzini --- nbd/server.c | 1 + 1 file changed, 1 insertion(+) diff --git a/nbd/server.c b/nbd/server.c index b95571bdf5..98e3957605 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -26,6 +26,7 @@ static int system_errno_to_nbd_errno(int err) case 0: return NBD_SUCCESS; case EPERM: + case EROFS: return NBD_EPERM; case EIO: return NBD_EIO; -- cgit v1.2.3