include/linux/inetdevice.h - kernel/msm-4.19 - Gitiles

 #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_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;
 	__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, void __user *);
 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 */
	#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_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;
	__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, void __user );
	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 */