v4.19.13 snapshot.
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
new file mode 100644
index 0000000..c759d1c
--- /dev/null
+++ b/include/linux/inetdevice.h
@@ -0,0 +1,274 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_INETDEVICE_H
+#define _LINUX_INETDEVICE_H
+
+#ifdef __KERNEL__
+
+#include <linux/bitmap.h>
+#include <linux/if.h>
+#include <linux/ip.h>
+#include <linux/netdevice.h>
+#include <linux/rcupdate.h>
+#include <linux/timer.h>
+#include <linux/sysctl.h>
+#include <linux/rtnetlink.h>
+#include <linux/refcount.h>
+
+struct ipv4_devconf {
+ void *sysctl;
+ int data[IPV4_DEVCONF_MAX];
+ DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
+};
+
+#define MC_HASH_SZ_LOG 9
+
+struct in_device {
+ struct net_device *dev;
+ refcount_t refcnt;
+ int dead;
+ struct in_ifaddr *ifa_list; /* IP ifaddr chain */
+
+ struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */
+ struct ip_mc_list __rcu * __rcu *mc_hash;
+
+ int mc_count; /* Number of installed mcasts */
+ spinlock_t mc_tomb_lock;
+ struct ip_mc_list *mc_tomb;
+ unsigned long mr_v1_seen;
+ unsigned long mr_v2_seen;
+ unsigned long mr_maxdelay;
+ unsigned char mr_qrv;
+ unsigned char mr_gq_running;
+ unsigned char mr_ifc_count;
+ struct timer_list mr_gq_timer; /* general query timer */
+ struct timer_list mr_ifc_timer; /* interface change timer */
+
+ struct neigh_parms *arp_parms;
+ struct ipv4_devconf cnf;
+ struct rcu_head rcu_head;
+};
+
+#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
+#define IPV4_DEVCONF_ALL(net, attr) \
+ IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
+
+static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
+{
+ index--;
+ return in_dev->cnf.data[index];
+}
+
+static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
+ int val)
+{
+ index--;
+ set_bit(index, in_dev->cnf.state);
+ in_dev->cnf.data[index] = val;
+}
+
+static inline void ipv4_devconf_setall(struct in_device *in_dev)
+{
+ bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
+}
+
+#define IN_DEV_CONF_GET(in_dev, attr) \
+ ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
+#define IN_DEV_CONF_SET(in_dev, attr, val) \
+ ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
+
+#define IN_DEV_ANDCONF(in_dev, attr) \
+ (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
+ IN_DEV_CONF_GET((in_dev), attr))
+
+#define IN_DEV_NET_ORCONF(in_dev, net, attr) \
+ (IPV4_DEVCONF_ALL(net, attr) || \
+ IN_DEV_CONF_GET((in_dev), attr))
+
+#define IN_DEV_ORCONF(in_dev, attr) \
+ IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
+
+#define IN_DEV_MAXCONF(in_dev, attr) \
+ (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
+ IN_DEV_CONF_GET((in_dev), attr)))
+
+#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
+#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
+#define IN_DEV_BFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), BC_FORWARDING)
+#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
+#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
+#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
+ ACCEPT_SOURCE_ROUTE)
+#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
+#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
+
+#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
+#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
+#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
+#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
+#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
+#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
+ SECURE_REDIRECTS)
+#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
+#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
+#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
+ IN_DEV_ORCONF((in_dev), \
+ PROMOTE_SECONDARIES)
+#define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
+#define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
+ IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
+
+#define IN_DEV_RX_REDIRECTS(in_dev) \
+ ((IN_DEV_FORWARD(in_dev) && \
+ IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
+ || (!IN_DEV_FORWARD(in_dev) && \
+ IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
+
+#define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
+ IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
+
+#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
+#define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
+#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
+#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
+#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
+
+struct in_ifaddr {
+ struct hlist_node hash;
+ struct in_ifaddr *ifa_next;
+ struct in_device *ifa_dev;
+ struct rcu_head rcu_head;
+ __be32 ifa_local;
+ __be32 ifa_address;
+ __be32 ifa_mask;
+ __u32 ifa_rt_priority;
+ __be32 ifa_broadcast;
+ unsigned char ifa_scope;
+ unsigned char ifa_prefixlen;
+ __u32 ifa_flags;
+ char ifa_label[IFNAMSIZ];
+
+ /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
+ __u32 ifa_valid_lft;
+ __u32 ifa_preferred_lft;
+ unsigned long ifa_cstamp; /* created timestamp */
+ unsigned long ifa_tstamp; /* updated timestamp */
+};
+
+struct in_validator_info {
+ __be32 ivi_addr;
+ struct in_device *ivi_dev;
+ struct netlink_ext_ack *extack;
+};
+
+int register_inetaddr_notifier(struct notifier_block *nb);
+int unregister_inetaddr_notifier(struct notifier_block *nb);
+int register_inetaddr_validator_notifier(struct notifier_block *nb);
+int unregister_inetaddr_validator_notifier(struct notifier_block *nb);
+
+void inet_netconf_notify_devconf(struct net *net, int event, int type,
+ int ifindex, struct ipv4_devconf *devconf);
+
+struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
+static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
+{
+ return __ip_dev_find(net, addr, true);
+}
+
+int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
+int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *);
+void devinet_init(void);
+struct in_device *inetdev_by_index(struct net *, int);
+__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
+__be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst,
+ __be32 local, int scope);
+struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
+ __be32 mask);
+struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr);
+static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
+{
+ return !((addr^ifa->ifa_address)&ifa->ifa_mask);
+}
+
+/*
+ * Check if a mask is acceptable.
+ */
+
+static __inline__ bool bad_mask(__be32 mask, __be32 addr)
+{
+ __u32 hmask;
+ if (addr & (mask = ~mask))
+ return true;
+ hmask = ntohl(mask);
+ if (hmask & (hmask+1))
+ return true;
+ return false;
+}
+
+#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
+ for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
+
+#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
+ for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
+
+
+#define endfor_ifa(in_dev) }
+
+static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
+{
+ return rcu_dereference(dev->ip_ptr);
+}
+
+static inline struct in_device *in_dev_get(const struct net_device *dev)
+{
+ struct in_device *in_dev;
+
+ rcu_read_lock();
+ in_dev = __in_dev_get_rcu(dev);
+ if (in_dev)
+ refcount_inc(&in_dev->refcnt);
+ rcu_read_unlock();
+ return in_dev;
+}
+
+static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
+{
+ return rtnl_dereference(dev->ip_ptr);
+}
+
+static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev)
+{
+ struct in_device *in_dev = __in_dev_get_rcu(dev);
+
+ return in_dev ? in_dev->arp_parms : NULL;
+}
+
+void in_dev_finish_destroy(struct in_device *idev);
+
+static inline void in_dev_put(struct in_device *idev)
+{
+ if (refcount_dec_and_test(&idev->refcnt))
+ in_dev_finish_destroy(idev);
+}
+
+#define __in_dev_put(idev) refcount_dec(&(idev)->refcnt)
+#define in_dev_hold(idev) refcount_inc(&(idev)->refcnt)
+
+#endif /* __KERNEL__ */
+
+static __inline__ __be32 inet_make_mask(int logmask)
+{
+ if (logmask)
+ return htonl(~((1U<<(32-logmask))-1));
+ return 0;
+}
+
+static __inline__ int inet_mask_len(__be32 mask)
+{
+ __u32 hmask = ntohl(mask);
+ if (!hmask)
+ return 0;
+ return 32 - ffz(~hmask);
+}
+
+
+#endif /* _LINUX_INETDEVICE_H */