[AFS]: Replace rtnetlink client by direct dev_base walking
Replace the large and complicated rtnetlink client by two simple
functions for getting the MAC address for the first ethernet device
and building a list of IPv4 addresses.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/fs/afs/netdevices.c b/fs/afs/netdevices.c
new file mode 100644
index 0000000..2b30873
--- /dev/null
+++ b/fs/afs/netdevices.c
@@ -0,0 +1,54 @@
+/* AFS network device helpers
+ *
+ * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
+ */
+
+#include <linux/string.h>
+#include <linux/rtnetlink.h>
+#include <linux/inetdevice.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include "internal.h"
+
+int afs_get_MAC_address(u8 mac[ETH_ALEN])
+{
+ struct net_device *dev;
+ int ret = -ENODEV;
+
+ rtnl_lock();
+ dev = __dev_getfirstbyhwtype(ARPHRD_ETHER);
+ if (dev) {
+ memcpy(mac, dev->dev_addr, ETH_ALEN);
+ ret = 0;
+ }
+ rtnl_unlock();
+ return ret;
+}
+
+int afs_get_ipv4_interfaces(struct afs_interface *bufs, size_t maxbufs,
+ bool wantloopback)
+{
+ struct net_device *dev;
+ struct in_device *idev;
+ int n = 0;
+
+ rtnl_lock();
+ for (dev = dev_base; dev; dev = dev->next) {
+ if (dev->type == ARPHRD_LOOPBACK && !wantloopback)
+ continue;
+ idev = __in_dev_get_rtnl(dev);
+ if (!idev)
+ continue;
+ for_primary_ifa(idev) {
+ if (n == maxbufs)
+ goto out;
+ bufs[n].address.s_addr = ifa->ifa_address;
+ bufs[n].netmask.s_addr = ifa->ifa_mask;
+ bufs[n].mtu = dev->mtu;
+ n++;
+ } endfor_ifa(idev)
+ }
+out:
+ rtnl_unlock();
+ return n;
+}