nbd: Remove NBDExport.close callback

The export close callback is unused by the built-in NBD server. qemu-nbd
uses it only during shutdown to wait for the unrefed export to actually
go away. It can just use nbd_export_close_all() instead and do without
the callback.

This removes the close callback from nbd_export_new() and makes both
callers of it more similar.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200924152717.287415-11-kwolf@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 1 insertions, 8 deletions

diff --git a/nbd/server.c b/nbd/server.c
index 23d9a53094..1cc915f01d 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -84,7 +84,6 @@ struct NBDRequestData {
 struct NBDExport {
     BlockExport common;
     int refcount;
-    void (*close)(NBDExport *exp);
 
     BlockBackend *blk;
     char *name;
@@ -1521,8 +1520,7 @@ void nbd_export_set_on_eject_blk(BlockExport *exp, BlockBackend *blk)
 NBDExport *nbd_export_new(BlockDriverState *bs,
                           const char *name, const char *desc,
                           const char *bitmap, bool readonly, bool shared,
-                          void (*close)(NBDExport *), bool writethrough,
-                          Error **errp)
+                          bool writethrough, Error **errp)
 {
     AioContext *ctx;
     BlockBackend *blk;
@@ -1625,7 +1623,6 @@ NBDExport *nbd_export_new(BlockDriverState *bs,
         assert(strlen(exp->export_bitmap_context) < NBD_MAX_STRING_SIZE);
     }
 
-    exp->close = close;
     exp->ctx = ctx;
     blk_add_aio_context_notifier(blk, blk_aio_attached, blk_aio_detach, exp);
 
@@ -1723,10 +1720,6 @@ void nbd_export_put(NBDExport *exp)
         assert(exp->name == NULL);
         assert(exp->description == NULL);
 
-        if (exp->close) {
-            exp->close(exp);
-        }
-
         if (exp->blk) {
             if (exp->eject_notifier_blk) {
                 notifier_remove(&exp->eject_notifier);