netdev: Add function netdev_is_open().

Add netdev_is_open(), which checks to see if a given netdev is
currently open.  It will be used to assist in cleaning up old ports
that are no longer in use.

diff --git a/lib/netdev.c b/lib/netdev.c
index af2382d3ab8d30e1572a0d9c5adcac5a49de5bea..d8fd7e44b54520fbcfd6e550d83c5372511cde60 100644 (file)
--- a/lib/netdev.c
+++ b/lib/netdev.c
@@ -435,6 +435,14 @@ netdev_exists(const char *name)
     }
 }
 
+/* Returns true if a network device named 'name' is currently opened,
+ * otherwise false. */
+bool
+netdev_is_open(const char *name)
+{
+    return !!shash_find_data(&netdev_dev_shash, name);
+}
+
 /*  Clears 'svec' and enumerates the names of all known network devices. */
 int
 netdev_enumerate(struct svec *svec)

diff --git a/lib/netdev.h b/lib/netdev.h
index 27eb82e5bd64091ef5ab1bc7b7fc9abe1bad3e70..63414aeeb19dbbc4517771e40e0be6adc997f794 100644 (file)
--- a/lib/netdev.h
+++ b/lib/netdev.h
@@ -105,6 +105,7 @@ int netdev_reconfigure(struct netdev *, const struct shash *args);
 void netdev_close(struct netdev *);
 
 bool netdev_exists(const char *name);
+bool netdev_is_open(const char *name);
 
 int netdev_enumerate(struct svec *);