Commit c0301fcc authored by Eric Blake's avatar Eric Blake Committed by Paolo Bonzini
Browse files

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: default avatarEric Blake <eblake@redhat.com>
Message-Id: <1459913704-19949-2-git-send-email-eblake@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent b3f3fdeb

nbd/server.c

+1 −0
Original line number Diff line number Diff line
@@ -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;