Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / afs / netdevices.c

diff --git a/kernel/fs/afs/netdevices.c b/kernel/fs/afs/netdevices.c
new file mode 100644 (file)
index 0000000..7ad3650
--- /dev/null
+++ b/kernel/fs/afs/netdevices.c
@@ -0,0 +1,68 @@
+/* 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 <net/net_namespace.h>
+#include "internal.h"
+
+/*
+ * get a MAC address from a random ethernet interface that has a real one
+ * - the buffer will normally be 6 bytes in size
+ */
+int afs_get_MAC_address(u8 *mac, size_t maclen)
+{
+       struct net_device *dev;
+       int ret = -ENODEV;
+
+       BUG_ON(maclen != ETH_ALEN);
+
+       rtnl_lock();
+       dev = __dev_getfirstbyhwtype(&init_net, ARPHRD_ETHER);
+       if (dev) {
+               memcpy(mac, dev->dev_addr, maclen);
+               ret = 0;
+       }
+       rtnl_unlock();
+       return ret;
+}
+
+/*
+ * get a list of this system's interface IPv4 addresses, netmasks and MTUs
+ * - maxbufs must be at least 1
+ * - returns the number of interface records in the buffer
+ */
+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;
+
+       ASSERT(maxbufs > 0);
+
+       rtnl_lock();
+       for_each_netdev(&init_net, dev) {
+               if (dev->type == ARPHRD_LOOPBACK && !wantloopback)
+                       continue;
+               idev = __in_dev_get_rtnl(dev);
+               if (!idev)
+                       continue;
+               for_primary_ifa(idev) {
+                       bufs[n].address.s_addr = ifa->ifa_address;
+                       bufs[n].netmask.s_addr = ifa->ifa_mask;
+                       bufs[n].mtu = dev->mtu;
+                       n++;
+                       if (n >= maxbufs)
+                               goto out;
+               } endfor_ifa(idev);
+       }
+out:
+       rtnl_unlock();
+       return n;
+}