| /* 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 __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; |
| 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_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_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 __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; |
| __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, 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 */ |