diff options
Diffstat (limited to 'fs/afs/netdevices.c')
| -rw-r--r-- | fs/afs/netdevices.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/fs/afs/netdevices.c b/fs/afs/netdevices.c new file mode 100644 index 000000000..2a009d193 --- /dev/null +++ b/fs/afs/netdevices.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0 +/* 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 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_net *net, 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(net->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; +} |