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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320/* 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_qi; /* Query Interval */ unsigned long mr_qri; /* Query Response Interval */ unsigned char mr_qrv; /* Query Robustness Variable */ unsigned char mr_gq_running; u32 mr_maxdelay; 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_RO(cnf, attr) READ_ONCE(IPV4_DEVCONF(cnf, attr))#define IPV4_DEVCONF_ALL(net, attr) \ IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)#define IPV4_DEVCONF_ALL_RO(net, attr) READ_ONCE(IPV4_DEVCONF_ALL(net, attr))
static inline int ipv4_devconf_get(const struct in_device *in_dev, int index){ index--; return READ_ONCE(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); WRITE_ONCE(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_RO(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_RO(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_RO(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 addr_lst; 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_INETint inet_gifconf(struct net_device *dev, char __user *buf, int len, int size);#elsestatic inline int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size){ return 0;}#endifvoid 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_rtnl_net(net, ifa, in_dev) \ for (ifa = rtnl_net_dereference(net, (in_dev)->ifa_list); ifa; \ ifa = rtnl_net_dereference(net, 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);}
static inline struct in_device *__in_dev_get_rtnl_net(const struct net_device *dev){ return rtnl_net_dereference(dev_net(dev), 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)
static inline bool in_dev_hold_safe(struct in_device *idev){ return refcount_inc_not_zero(&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 */