1 files changed, 303 insertions, 0 deletions
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
new file mode 100644
index 000000000..ddb27fc0e
--- /dev/null
+++ b/include/linux/inetdevice.h
@@ -0,0 +1,303 @@
+/* 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;
+	netdevice_tracker	dev_tracker;
+
+	refcount_t		refcnt;
+	int			dead;
+	struct in_ifaddr	__rcu *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 long		mr_qi;		/* Query Interval */
+	unsigned long		mr_qri;		/* Query Response Interval */
+	unsigned char		mr_qrv;		/* Query Robustness Variable */
+	unsigned char		mr_gq_running;
+	u32			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_ORCONF((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_ORCONF((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_MAXCONF((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)
+#define IN_DEV_ARP_EVICT_NOCARRIER(in_dev) IN_DEV_ANDCONF((in_dev), \
+							  ARP_EVICT_NOCARRIER)
+
+struct in_ifaddr {
+	struct hlist_node	hash;
+	struct in_ifaddr	__rcu *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;
+	unsigned char		ifa_proto;
+	__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 *);
+#ifdef CONFIG_INET
+int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size);
+#else
+static inline int inet_gifconf(struct net_device *dev, char __user *buf,
+			       int len, int size)
+{
+	return 0;
+}
+#endif
+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, const 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 in_dev_for_each_ifa_rtnl(ifa, in_dev)			\
+	for (ifa = rtnl_dereference((in_dev)->ifa_list); ifa;	\
+	     ifa = rtnl_dereference(ifa->ifa_next))
+
+#define in_dev_for_each_ifa_rcu(ifa, in_dev)			\
+	for (ifa = rcu_dereference((in_dev)->ifa_list); ifa;	\
+	     ifa = rcu_dereference(ifa->ifa_next))
+
+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);
+}
+
+/* called with rcu_read_lock or rtnl held */
+static inline bool ip_ignore_linkdown(const struct net_device *dev)
+{
+	struct in_device *in_dev;
+	bool rc = false;
+
+	in_dev = rcu_dereference_rtnl(dev->ip_ptr);
+	if (in_dev &&
+	    IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev))
+		rc = true;
+
+	return rc;
+}
+
+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 */