Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_INETDEVICE_H |
3 | #define _LINUX_INETDEVICE_H | |
4 | ||
5 | #ifdef __KERNEL__ | |
6 | ||
31be3085 | 7 | #include <linux/bitmap.h> |
1da177e4 | 8 | #include <linux/if.h> |
4a5a8aa6 | 9 | #include <linux/ip.h> |
1da177e4 LT |
10 | #include <linux/netdevice.h> |
11 | #include <linux/rcupdate.h> | |
12 | #include <linux/timer.h> | |
8bfe6d68 | 13 | #include <linux/sysctl.h> |
95ae6b22 | 14 | #include <linux/rtnetlink.h> |
7658b36f | 15 | #include <linux/refcount.h> |
1da177e4 | 16 | |
d94d9fee | 17 | struct ipv4_devconf { |
1da177e4 | 18 | void *sysctl; |
ca7479eb TG |
19 | int data[IPV4_DEVCONF_MAX]; |
20 | DECLARE_BITMAP(state, IPV4_DEVCONF_MAX); | |
1da177e4 LT |
21 | }; |
22 | ||
e9897071 ED |
23 | #define MC_HASH_SZ_LOG 9 |
24 | ||
d94d9fee | 25 | struct in_device { |
1da177e4 | 26 | struct net_device *dev; |
7658b36f | 27 | refcount_t refcnt; |
1da177e4 LT |
28 | int dead; |
29 | struct in_ifaddr *ifa_list; /* IP ifaddr chain */ | |
e9897071 | 30 | |
1d7138de | 31 | struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ |
e9897071 ED |
32 | struct ip_mc_list __rcu * __rcu *mc_hash; |
33 | ||
1d7138de | 34 | int mc_count; /* Number of installed mcasts */ |
1da177e4 LT |
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 char mr_qrv; | |
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 */ | |
45 | ||
46 | struct neigh_parms *arp_parms; | |
47 | struct ipv4_devconf cnf; | |
48 | struct rcu_head rcu_head; | |
49 | }; | |
50 | ||
02291680 | 51 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) |
586f1211 PE |
52 | #define IPV4_DEVCONF_ALL(net, attr) \ |
53 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) | |
42f811b8 HX |
54 | |
55 | static inline int ipv4_devconf_get(struct in_device *in_dev, int index) | |
56 | { | |
57 | index--; | |
58 | return in_dev->cnf.data[index]; | |
59 | } | |
60 | ||
61 | static inline void ipv4_devconf_set(struct in_device *in_dev, int index, | |
62 | int val) | |
63 | { | |
64 | index--; | |
31be3085 | 65 | set_bit(index, in_dev->cnf.state); |
42f811b8 HX |
66 | in_dev->cnf.data[index] = val; |
67 | } | |
68 | ||
71e27da9 HX |
69 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
70 | { | |
ca7479eb | 71 | bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX); |
71e27da9 HX |
72 | } |
73 | ||
42f811b8 | 74 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
02291680 | 75 | ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) |
42f811b8 | 76 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ |
02291680 | 77 | ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) |
42f811b8 HX |
78 | |
79 | #define IN_DEV_ANDCONF(in_dev, attr) \ | |
c346dca1 | 80 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \ |
586f1211 | 81 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
82 | |
83 | #define IN_DEV_NET_ORCONF(in_dev, net, attr) \ | |
84 | (IPV4_DEVCONF_ALL(net, attr) || \ | |
586f1211 | 85 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
86 | |
87 | #define IN_DEV_ORCONF(in_dev, attr) \ | |
88 | IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr) | |
89 | ||
42f811b8 | 90 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
c346dca1 | 91 | (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \ |
586f1211 | 92 | IN_DEV_CONF_GET((in_dev), attr))) |
42f811b8 HX |
93 | |
94 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) | |
01ecfe9b | 95 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
27fed417 | 96 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) |
28f6aeea | 97 | #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) |
42f811b8 HX |
98 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ |
99 | ACCEPT_SOURCE_ROUTE) | |
8153a10c | 100 | #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) |
42f811b8 HX |
101 | #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) |
102 | ||
103 | #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) | |
104 | #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) | |
65324144 | 105 | #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN) |
42f811b8 HX |
106 | #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) |
107 | #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) | |
108 | #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ | |
109 | SECURE_REDIRECTS) | |
110 | #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) | |
111 | #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) | |
112 | #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ | |
113 | IN_DEV_ORCONF((in_dev), \ | |
114 | PROMOTE_SECONDARIES) | |
d0daebc3 | 115 | #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET) |
9eb43e76 ED |
116 | #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \ |
117 | IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET) | |
1da177e4 LT |
118 | |
119 | #define IN_DEV_RX_REDIRECTS(in_dev) \ | |
120 | ((IN_DEV_FORWARD(in_dev) && \ | |
42f811b8 | 121 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
1da177e4 | 122 | || (!IN_DEV_FORWARD(in_dev) && \ |
42f811b8 | 123 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
1da177e4 | 124 | |
0eeb075f AG |
125 | #define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \ |
126 | IN_DEV_CONF_GET((in_dev), IGNORE_ROUTES_WITH_LINKDOWN) | |
127 | ||
42f811b8 | 128 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
124d37e9 | 129 | #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT) |
42f811b8 HX |
130 | #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) |
131 | #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) | |
eefef1cf | 132 | #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) |
1da177e4 | 133 | |
d94d9fee | 134 | struct in_ifaddr { |
fd23c3b3 | 135 | struct hlist_node hash; |
1da177e4 LT |
136 | struct in_ifaddr *ifa_next; |
137 | struct in_device *ifa_dev; | |
138 | struct rcu_head rcu_head; | |
a144ea4b AV |
139 | __be32 ifa_local; |
140 | __be32 ifa_address; | |
141 | __be32 ifa_mask; | |
142 | __be32 ifa_broadcast; | |
1da177e4 | 143 | unsigned char ifa_scope; |
1da177e4 | 144 | unsigned char ifa_prefixlen; |
ad6c8135 | 145 | __u32 ifa_flags; |
1da177e4 | 146 | char ifa_label[IFNAMSIZ]; |
5c766d64 JP |
147 | |
148 | /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */ | |
149 | __u32 ifa_valid_lft; | |
150 | __u32 ifa_preferred_lft; | |
151 | unsigned long ifa_cstamp; /* created timestamp */ | |
152 | unsigned long ifa_tstamp; /* updated timestamp */ | |
1da177e4 LT |
153 | }; |
154 | ||
3ad7d246 KJ |
155 | struct in_validator_info { |
156 | __be32 ivi_addr; | |
157 | struct in_device *ivi_dev; | |
de95e047 | 158 | struct netlink_ext_ack *extack; |
3ad7d246 KJ |
159 | }; |
160 | ||
f629d208 JP |
161 | int register_inetaddr_notifier(struct notifier_block *nb); |
162 | int unregister_inetaddr_notifier(struct notifier_block *nb); | |
3ad7d246 KJ |
163 | int register_inetaddr_validator_notifier(struct notifier_block *nb); |
164 | int unregister_inetaddr_validator_notifier(struct notifier_block *nb); | |
1da177e4 | 165 | |
3b022865 DA |
166 | void inet_netconf_notify_devconf(struct net *net, int event, int type, |
167 | int ifindex, struct ipv4_devconf *devconf); | |
d67b8c61 | 168 | |
f629d208 | 169 | struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref); |
82efee14 ED |
170 | static inline struct net_device *ip_dev_find(struct net *net, __be32 addr) |
171 | { | |
172 | return __ip_dev_find(net, addr, true); | |
173 | } | |
174 | ||
f629d208 JP |
175 | int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); |
176 | int devinet_ioctl(struct net *net, unsigned int cmd, void __user *); | |
177 | void devinet_init(void); | |
178 | struct in_device *inetdev_by_index(struct net *, int); | |
179 | __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); | |
b601fa19 ND |
180 | __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst, |
181 | __be32 local, int scope); | |
f629d208 JP |
182 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
183 | __be32 mask); | |
6e617de8 | 184 | struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr); |
c3225164 | 185 | static __inline__ bool inet_ifa_match(__be32 addr, struct in_ifaddr *ifa) |
1da177e4 LT |
186 | { |
187 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); | |
188 | } | |
189 | ||
190 | /* | |
191 | * Check if a mask is acceptable. | |
192 | */ | |
193 | ||
f06cc7b2 | 194 | static __inline__ bool bad_mask(__be32 mask, __be32 addr) |
1da177e4 | 195 | { |
714e85be | 196 | __u32 hmask; |
1da177e4 | 197 | if (addr & (mask = ~mask)) |
f06cc7b2 | 198 | return true; |
714e85be AV |
199 | hmask = ntohl(mask); |
200 | if (hmask & (hmask+1)) | |
f06cc7b2 YB |
201 | return true; |
202 | return false; | |
1da177e4 LT |
203 | } |
204 | ||
205 | #define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
206 | for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next) | |
207 | ||
208 | #define for_ifa(in_dev) { struct in_ifaddr *ifa; \ | |
209 | for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next) | |
210 | ||
211 | ||
212 | #define endfor_ifa(in_dev) } | |
213 | ||
e5ed6399 HX |
214 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
215 | { | |
95ae6b22 | 216 | return rcu_dereference(dev->ip_ptr); |
e5ed6399 HX |
217 | } |
218 | ||
95ae6b22 | 219 | static inline struct in_device *in_dev_get(const struct net_device *dev) |
1da177e4 LT |
220 | { |
221 | struct in_device *in_dev; | |
222 | ||
223 | rcu_read_lock(); | |
e5ed6399 | 224 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 | 225 | if (in_dev) |
7658b36f | 226 | refcount_inc(&in_dev->refcnt); |
1da177e4 LT |
227 | rcu_read_unlock(); |
228 | return in_dev; | |
229 | } | |
230 | ||
95ae6b22 | 231 | static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 | 232 | { |
06a9701f | 233 | return rtnl_dereference(dev->ip_ptr); |
1da177e4 LT |
234 | } |
235 | ||
1d4c8c29 JP |
236 | static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev) |
237 | { | |
238 | struct in_device *in_dev = __in_dev_get_rcu(dev); | |
239 | ||
240 | return in_dev ? in_dev->arp_parms : NULL; | |
241 | } | |
242 | ||
f629d208 | 243 | void in_dev_finish_destroy(struct in_device *idev); |
1da177e4 LT |
244 | |
245 | static inline void in_dev_put(struct in_device *idev) | |
246 | { | |
7658b36f | 247 | if (refcount_dec_and_test(&idev->refcnt)) |
1da177e4 LT |
248 | in_dev_finish_destroy(idev); |
249 | } | |
250 | ||
7658b36f RE |
251 | #define __in_dev_put(idev) refcount_dec(&(idev)->refcnt) |
252 | #define in_dev_hold(idev) refcount_inc(&(idev)->refcnt) | |
1da177e4 LT |
253 | |
254 | #endif /* __KERNEL__ */ | |
255 | ||
60cad5da | 256 | static __inline__ __be32 inet_make_mask(int logmask) |
1da177e4 LT |
257 | { |
258 | if (logmask) | |
84bc8868 | 259 | return htonl(~((1U<<(32-logmask))-1)); |
1da177e4 LT |
260 | return 0; |
261 | } | |
262 | ||
714e85be | 263 | static __inline__ int inet_mask_len(__be32 mask) |
1da177e4 | 264 | { |
714e85be AV |
265 | __u32 hmask = ntohl(mask); |
266 | if (!hmask) | |
1da177e4 | 267 | return 0; |
714e85be | 268 | return 32 - ffz(~hmask); |
1da177e4 LT |
269 | } |
270 | ||
271 | ||
272 | #endif /* _LINUX_INETDEVICE_H */ |