From: Eric Blake <eblake@redhat.com>
Date: Fri, 30 Nov 2018 02:32:30 +0000 (-0600)
Subject: nbd/server: Advertise all contexts in response to bare LIST
X-Git-Tag: v3.0.1~38
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e13f56a1540440226173291d003a230058030d5f;p=thirdparty%2Fqemu.git

nbd/server: Advertise all contexts in response to bare LIST

The NBD spec, and even our code comment, says that if the client
asks for NBD_OPT_LIST_META_CONTEXT with 0 queries, then we should
reply with (a possibly-compressed representation of) ALL contexts
that we are willing to let them try.  But commit 3d068aff forgot
to advertise qemu:dirty-bitmap:FOO.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20181130023232.3079982-2-eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
(cherry picked from commit e31d802479df9daff1994a7ed1e36bbc5bb19d03)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---

diff --git a/nbd/server.c b/nbd/server.c
index adcba66aa9c..2193e16c68d 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -978,6 +978,7 @@ static int nbd_negotiate_meta_queries(NBDClient *client,
     if (client->opt == NBD_OPT_LIST_META_CONTEXT && !nb_queries) {
         /* enable all known contexts */
         meta->base_allocation = true;
+        meta->bitmap = !!meta->exp->export_bitmap;
     } else {
         for (i = 0; i < nb_queries; ++i) {
             ret = nbd_negotiate_meta_query(client, meta, errp);