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notifiers: Create and destroy nln_notifiers.

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This patch changes the interface of netlink-notifier and
rtnetlink-link.  Now nln_notifiers are allocated and destroyed by
the module instead of passed in by callers.  This allows the
definition of nln_notifier to be hidden, and generally cleans up
the code.
This commit is contained in:
Ethan Jackson
2011-09-15 11:21:23 -07:00
parent 18a2378164
commit 2ee6545f2b
8 changed files with 81 additions and 62 deletions
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18
lib/netdev-linux.c
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@@ -105,7 +105,7 @@ COVERAGE_DEFINE(netdev_ethtool);
#define TC_RTAB_SIZE 1024
#endif
static struct nln_notifier netdev_linux_cache_notifier;
static struct nln_notifier *netdev_linux_cache_notifier = NULL;
static int cache_notifier_refcount;
enum {
@@ -526,13 +526,15 @@ netdev_linux_create(const struct netdev_class *class, const char *name,
struct netdev_dev **netdev_devp)
{
struct netdev_dev_linux *netdev_dev;
int error;
if (!cache_notifier_refcount) {
error = rtnetlink_link_notifier_register(&netdev_linux_cache_notifier,
netdev_linux_cache_cb, NULL);
if (error) {
return error;
assert(!netdev_linux_cache_notifier);
netdev_linux_cache_notifier =
rtnetlink_link_notifier_create(netdev_linux_cache_cb, NULL);
if (!netdev_linux_cache_notifier) {
return EINVAL;
}
}
cache_notifier_refcount++;
@@ -622,7 +624,9 @@ netdev_linux_destroy(struct netdev_dev *netdev_dev_)
cache_notifier_refcount--;
if (!cache_notifier_refcount) {
rtnetlink_link_notifier_unregister(&netdev_linux_cache_notifier);
assert(netdev_linux_cache_notifier);
rtnetlink_link_notifier_destroy(netdev_linux_cache_notifier);
netdev_linux_cache_notifier = NULL;
}
} else if (class == &netdev_tap_class) {
destroy_tap(netdev_dev);