Merge remote-tracking branches 'regulator/topic/notifier', 'regulator/topic/pfuze100...
[sfrench/cifs-2.6.git] / fs / afs / netdevices.c
1 /* AFS network device helpers
2  *
3  * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
4  */
5
6 #include <linux/string.h>
7 #include <linux/rtnetlink.h>
8 #include <linux/inetdevice.h>
9 #include <linux/netdevice.h>
10 #include <linux/if_arp.h>
11 #include <net/net_namespace.h>
12 #include "internal.h"
13
14 /*
15  * get a list of this system's interface IPv4 addresses, netmasks and MTUs
16  * - maxbufs must be at least 1
17  * - returns the number of interface records in the buffer
18  */
19 int afs_get_ipv4_interfaces(struct afs_interface *bufs, size_t maxbufs,
20                             bool wantloopback)
21 {
22         struct net_device *dev;
23         struct in_device *idev;
24         int n = 0;
25
26         ASSERT(maxbufs > 0);
27
28         rtnl_lock();
29         for_each_netdev(&init_net, dev) {
30                 if (dev->type == ARPHRD_LOOPBACK && !wantloopback)
31                         continue;
32                 idev = __in_dev_get_rtnl(dev);
33                 if (!idev)
34                         continue;
35                 for_primary_ifa(idev) {
36                         bufs[n].address.s_addr = ifa->ifa_address;
37                         bufs[n].netmask.s_addr = ifa->ifa_mask;
38                         bufs[n].mtu = dev->mtu;
39                         n++;
40                         if (n >= maxbufs)
41                                 goto out;
42                 } endfor_ifa(idev);
43         }
44 out:
45         rtnl_unlock();
46         return n;
47 }