11.01.2018 02:08, Eric Blake wrote:
From: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>

Instead of passing currently negotiating option and its length to
many of negotiation functions let's just store them on NBDClient
struct to be state-variables of negotiation phase.

This unifies semantics of negotiation functions and allows
tracking changes of remaining option length in future patches.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
Message-Id: <20171122101958.17065-2-vsement...@virtuozzo.com>
[eblake: rebase, commit message tweak, assert !optlen after
negotiation completes]
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
  nbd/server.c | 168 +++++++++++++++++++++++++++++------------------------------
  1 file changed, 84 insertions(+), 84 deletions(-)

[..]

@@ -818,7 +817,7 @@ static int nbd_negotiate_options(NBDClient *client, 
uint16_t myflags,
               */
              switch (option) {
              case NBD_OPT_EXPORT_NAME:
-                return nbd_negotiate_handle_export_name(client, length,
+                return nbd_negotiate_handle_export_name(client,
                                                          myflags, no_zeroes,
                                                          errp);

@@ -1707,6 +1706,7 @@ static coroutine_fn void nbd_co_client_start(void *opaque)
          return;
      }

+    assert(!client->optlen);


hmm, should not it be at the end of nbd_negotiate() ? Looks OK anyway.

      nbd_client_receive_next_request(client);
  }



--
Best regards,
Vladimir


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