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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
;
40 unsigned long mr_qi
; /* Query Interval */
41 unsigned long mr_qri
; /* Query Response Interval */
42 unsigned char mr_qrv
; /* Query Robustness Variable */
43 unsigned char mr_gq_running
;
44 unsigned char mr_ifc_count
;
45 struct timer_list mr_gq_timer
; /* general query timer */
46 struct timer_list mr_ifc_timer
; /* interface change timer */
48 struct neigh_parms
*arp_parms
;
49 struct ipv4_devconf cnf
;
50 struct rcu_head rcu_head
;
53 #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
54 #define IPV4_DEVCONF_ALL(net, attr) \
55 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
57 static inline int ipv4_devconf_get(struct in_device
*in_dev
, int index
)
60 return in_dev
->cnf
.data
[index
];
63 static inline void ipv4_devconf_set(struct in_device
*in_dev
, int index
,
67 set_bit(index
, in_dev
->cnf
.state
);
68 in_dev
->cnf
.data
[index
] = val
;
71 static inline void ipv4_devconf_setall(struct in_device
*in_dev
)
73 bitmap_fill(in_dev
->cnf
.state
, IPV4_DEVCONF_MAX
);
76 #define IN_DEV_CONF_GET(in_dev, attr) \
77 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
78 #define IN_DEV_CONF_SET(in_dev, attr, val) \
79 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
81 #define IN_DEV_ANDCONF(in_dev, attr) \
82 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
83 IN_DEV_CONF_GET((in_dev), attr))
85 #define IN_DEV_NET_ORCONF(in_dev, net, attr) \
86 (IPV4_DEVCONF_ALL(net, attr) || \
87 IN_DEV_CONF_GET((in_dev), attr))
89 #define IN_DEV_ORCONF(in_dev, attr) \
90 IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
92 #define IN_DEV_MAXCONF(in_dev, attr) \
93 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
94 IN_DEV_CONF_GET((in_dev), attr)))
96 #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
97 #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
98 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
99 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
100 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
102 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
103 #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
105 #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
106 #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
107 #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
108 #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
109 #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
110 #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
112 #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
113 #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
114 #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
115 IN_DEV_ORCONF((in_dev), \
117 #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
118 #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
119 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
121 #define IN_DEV_RX_REDIRECTS(in_dev) \
122 ((IN_DEV_FORWARD(in_dev) && \
123 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
124 || (!IN_DEV_FORWARD(in_dev) && \
125 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
127 #define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
128 IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
130 #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
131 #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
132 #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
133 #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
134 #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
137 struct hlist_node hash
;
138 struct in_ifaddr
*ifa_next
;
139 struct in_device
*ifa_dev
;
140 struct rcu_head rcu_head
;
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
, void __user
*);
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 */