1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_INETDEVICE_H
3 #define _LINUX_INETDEVICE_H
7 #include <linux/bitmap.h>
10 #include <linux/netdevice.h>
11 #include <linux/rcupdate.h>
12 #include <linux/timer.h>
13 #include <linux/sysctl.h>
14 #include <linux/rtnetlink.h>
15 #include <linux/refcount.h>
19 int data[IPV4_DEVCONF_MAX];
20 DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
23 #define MC_HASH_SZ_LOG 9
26 struct net_device *dev;
29 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
31 struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */
32 struct ip_mc_list __rcu * __rcu *mc_hash;
34 int mc_count; /* Number of installed mcasts */
35 spinlock_t mc_tomb_lock;
36 struct ip_mc_list *mc_tomb;
37 unsigned long mr_v1_seen;
38 unsigned long mr_v2_seen;
39 unsigned long mr_maxdelay;
41 unsigned char mr_gq_running;
42 unsigned char mr_ifc_count;
43 struct timer_list mr_gq_timer; /* general query timer */
44 struct timer_list mr_ifc_timer; /* interface change timer */
46 struct neigh_parms *arp_parms;
47 struct ipv4_devconf cnf;
48 struct rcu_head rcu_head;
51 #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
52 #define IPV4_DEVCONF_ALL(net, attr) \
53 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
55 static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
58 return in_dev->cnf.data[index];
61 static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
65 set_bit(index, in_dev->cnf.state);
66 in_dev->cnf.data[index] = val;
69 static inline void ipv4_devconf_setall(struct in_device *in_dev)
71 bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
74 #define IN_DEV_CONF_GET(in_dev, attr) \
75 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
76 #define IN_DEV_CONF_SET(in_dev, attr, val) \
77 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
79 #define IN_DEV_ANDCONF(in_dev, attr) \
80 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
81 IN_DEV_CONF_GET((in_dev), attr))
83 #define IN_DEV_NET_ORCONF(in_dev, net, attr) \
84 (IPV4_DEVCONF_ALL(net, attr) || \
85 IN_DEV_CONF_GET((in_dev), attr))
87 #define IN_DEV_ORCONF(in_dev, attr) \
88 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
90 #define IN_DEV_MAXCONF(in_dev, attr) \
91 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
92 IN_DEV_CONF_GET((in_dev), attr)))
94 #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
95 #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
96 #define IN_DEV_BFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), BC_FORWARDING)
97 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
98 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
99 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
101 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
102 #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
104 #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
105 #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
106 #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
107 #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
108 #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
109 #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
111 #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
112 #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
113 #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
114 IN_DEV_ORCONF((in_dev), \
116 #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
117 #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
118 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
120 #define IN_DEV_RX_REDIRECTS(in_dev) \
121 ((IN_DEV_FORWARD(in_dev) && \
122 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
123 || (!IN_DEV_FORWARD(in_dev) && \
124 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
126 #define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
127 IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
129 #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
130 #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
131 #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
132 #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
133 #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
136 struct hlist_node hash;
137 struct in_ifaddr *ifa_next;
138 struct in_device *ifa_dev;
139 struct rcu_head rcu_head;
143 __u32 ifa_rt_priority;
144 __be32 ifa_broadcast;
145 unsigned char ifa_scope;
146 unsigned char ifa_prefixlen;
148 char ifa_label[IFNAMSIZ];
150 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
152 __u32 ifa_preferred_lft;
153 unsigned long ifa_cstamp; /* created timestamp */
154 unsigned long ifa_tstamp; /* updated timestamp */
157 struct in_validator_info {
159 struct in_device *ivi_dev;
160 struct netlink_ext_ack *extack;
163 int register_inetaddr_notifier(struct notifier_block *nb);
164 int unregister_inetaddr_notifier(struct notifier_block *nb);
165 int register_inetaddr_validator_notifier(struct notifier_block *nb);
166 int unregister_inetaddr_validator_notifier(struct notifier_block *nb);
168 void inet_netconf_notify_devconf(struct net *net, int event, int type,
169 int ifindex, struct ipv4_devconf *devconf);
171 struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
172 static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
174 return __ip_dev_find(net, addr, true);
177 int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
178 int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *);
179 void devinet_init(void);
180 struct in_device *inetdev_by_index(struct net *, int);
181 __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
182 __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst,
183 __be32 local, int scope);
184 struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
186 struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr);
187 static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
189 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
193 * Check if a mask is acceptable.
196 static __inline__ bool bad_mask(__be32 mask, __be32 addr)
199 if (addr & (mask = ~mask))
202 if (hmask & (hmask+1))
207 #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
208 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
210 #define for_ifa(in_dev) { struct in_ifaddr *ifa; \
211 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
214 #define endfor_ifa(in_dev) }
216 static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
218 return rcu_dereference(dev->ip_ptr);
221 static inline struct in_device *in_dev_get(const struct net_device *dev)
223 struct in_device *in_dev;
226 in_dev = __in_dev_get_rcu(dev);
228 refcount_inc(&in_dev->refcnt);
233 static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
235 return rtnl_dereference(dev->ip_ptr);
238 static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev)
240 struct in_device *in_dev = __in_dev_get_rcu(dev);
242 return in_dev ? in_dev->arp_parms : NULL;
245 void in_dev_finish_destroy(struct in_device *idev);
247 static inline void in_dev_put(struct in_device *idev)
249 if (refcount_dec_and_test(&idev->refcnt))
250 in_dev_finish_destroy(idev);
253 #define __in_dev_put(idev) refcount_dec(&(idev)->refcnt)
254 #define in_dev_hold(idev) refcount_inc(&(idev)->refcnt)
256 #endif /* __KERNEL__ */
258 static __inline__ __be32 inet_make_mask(int logmask)
261 return htonl(~((1U<<(32-logmask))-1));
265 static __inline__ int inet_mask_len(__be32 mask)
267 __u32 hmask = ntohl(mask);
270 return 32 - ffz(~hmask);
274 #endif /* _LINUX_INETDEVICE_H */