From 0868a05550088156cd401ff8025ecfa8fc1e912a Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Tue, 30 Dec 2008 13:12:48 -0800
Subject: [PATCH] New function nl_sock_wait(), to improve netlink socket
 abstraction.

---
 lib/netlink.c       | 10 ++++++----
 lib/netlink.h       |  2 +-
 lib/vconn-netlink.c |  2 +-
 vswitchd/brcompat.c |  2 +-
 4 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/lib/netlink.c b/lib/netlink.c
index cb4e6c1a..28c1f116 100644
--- a/lib/netlink.c
+++ b/lib/netlink.c
@@ -44,6 +44,7 @@
 #include "dynamic-string.h"
 #include "netlink-protocol.h"
 #include "ofpbuf.h"
+#include "poll-loop.h"
 #include "timeval.h"
 #include "util.h"
 
@@ -424,11 +425,12 @@ recv:
     return 0;
 }
 
-/* Returns 'sock''s underlying file descriptor. */
-int
-nl_sock_fd(const struct nl_sock *sock) 
+/* Causes poll_block() to wake up when any of the specified 'events' (which is
+ * a OR'd combination of POLLIN, POLLOUT, etc.) occur on 'sock'. */
+void
+nl_sock_wait(const struct nl_sock *sock, short int events)
 {
-    return sock->fd;
+    poll_fd_wait(sock->fd, events);
 }
 
 /* Netlink messages. */
diff --git a/lib/netlink.h b/lib/netlink.h
index 8163a318..d68d7793 100644
--- a/lib/netlink.h
+++ b/lib/netlink.h
@@ -65,7 +65,7 @@ int nl_sock_recv(struct nl_sock *, struct ofpbuf **, bool wait);
 int nl_sock_transact(struct nl_sock *, const struct ofpbuf *request,
                      struct ofpbuf **reply);
 
-int nl_sock_fd(const struct nl_sock *);
+void nl_sock_wait(const struct nl_sock *, short int events);
 
 /* Netlink messages. */
 
diff --git a/lib/vconn-netlink.c b/lib/vconn-netlink.c
index 91faa713..f4aa65a8 100644
--- a/lib/vconn-netlink.c
+++ b/lib/vconn-netlink.c
@@ -141,7 +141,7 @@ netlink_wait(struct vconn *vconn, enum vconn_wait_type wait)
     default:
         NOT_REACHED();
     }
-    poll_fd_wait(nl_sock_fd(netlink->dp.sock), events);
+    nl_sock_wait(netlink->dp.sock, events);
 }
 
 struct vconn_class netlink_vconn_class = {
diff --git a/vswitchd/brcompat.c b/vswitchd/brcompat.c
index b4da4fbf..a9a70854 100644
--- a/vswitchd/brcompat.c
+++ b/vswitchd/brcompat.c
@@ -430,7 +430,7 @@ brc_run(void)
 void
 brc_wait(void)
 {
-    poll_fd_wait(nl_sock_fd(nl_sock), POLLIN);
+    nl_sock_wait(nl_sock, POLLIN);
 }
 
 void
-- 
2.30.2