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; |
c04438f5 ED |
27 | netdevice_tracker dev_tracker; |
28 | ||
7658b36f | 29 | refcount_t refcnt; |
1da177e4 | 30 | int dead; |
2638eb8b | 31 | struct in_ifaddr __rcu *ifa_list;/* IP ifaddr chain */ |
e9897071 | 32 | |
1d7138de | 33 | struct ip_mc_list __rcu *mc_list; /* IP multicast filter chain */ |
e9897071 ED |
34 | struct ip_mc_list __rcu * __rcu *mc_hash; |
35 | ||
1d7138de | 36 | int mc_count; /* Number of installed mcasts */ |
1da177e4 LT |
37 | spinlock_t mc_tomb_lock; |
38 | struct ip_mc_list *mc_tomb; | |
39 | unsigned long mr_v1_seen; | |
40 | unsigned long mr_v2_seen; | |
41 | unsigned long mr_maxdelay; | |
966c37f2 HL |
42 | unsigned long mr_qi; /* Query Interval */ |
43 | unsigned long mr_qri; /* Query Response Interval */ | |
44 | unsigned char mr_qrv; /* Query Robustness Variable */ | |
1da177e4 | 45 | unsigned char mr_gq_running; |
b69dd5b3 | 46 | u32 mr_ifc_count; |
1da177e4 LT |
47 | struct timer_list mr_gq_timer; /* general query timer */ |
48 | struct timer_list mr_ifc_timer; /* interface change timer */ | |
49 | ||
50 | struct neigh_parms *arp_parms; | |
51 | struct ipv4_devconf cnf; | |
52 | struct rcu_head rcu_head; | |
53 | }; | |
54 | ||
02291680 | 55 | #define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1]) |
0598f8f3 | 56 | #define IPV4_DEVCONF_RO(cnf, attr) READ_ONCE(IPV4_DEVCONF(cnf, attr)) |
586f1211 PE |
57 | #define IPV4_DEVCONF_ALL(net, attr) \ |
58 | IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr) | |
0598f8f3 | 59 | #define IPV4_DEVCONF_ALL_RO(net, attr) READ_ONCE(IPV4_DEVCONF_ALL(net, attr)) |
42f811b8 | 60 | |
0598f8f3 | 61 | static inline int ipv4_devconf_get(const struct in_device *in_dev, int index) |
42f811b8 HX |
62 | { |
63 | index--; | |
0598f8f3 | 64 | return READ_ONCE(in_dev->cnf.data[index]); |
42f811b8 HX |
65 | } |
66 | ||
67 | static inline void ipv4_devconf_set(struct in_device *in_dev, int index, | |
68 | int val) | |
69 | { | |
70 | index--; | |
31be3085 | 71 | set_bit(index, in_dev->cnf.state); |
0598f8f3 | 72 | WRITE_ONCE(in_dev->cnf.data[index], val); |
42f811b8 HX |
73 | } |
74 | ||
71e27da9 HX |
75 | static inline void ipv4_devconf_setall(struct in_device *in_dev) |
76 | { | |
ca7479eb | 77 | bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX); |
71e27da9 HX |
78 | } |
79 | ||
42f811b8 | 80 | #define IN_DEV_CONF_GET(in_dev, attr) \ |
02291680 | 81 | ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr) |
42f811b8 | 82 | #define IN_DEV_CONF_SET(in_dev, attr, val) \ |
02291680 | 83 | ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val)) |
42f811b8 HX |
84 | |
85 | #define IN_DEV_ANDCONF(in_dev, attr) \ | |
0598f8f3 | 86 | (IPV4_DEVCONF_ALL_RO(dev_net(in_dev->dev), attr) && \ |
586f1211 | 87 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
88 | |
89 | #define IN_DEV_NET_ORCONF(in_dev, net, attr) \ | |
0598f8f3 | 90 | (IPV4_DEVCONF_ALL_RO(net, attr) || \ |
586f1211 | 91 | IN_DEV_CONF_GET((in_dev), attr)) |
9eb43e76 ED |
92 | |
93 | #define IN_DEV_ORCONF(in_dev, attr) \ | |
94 | IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr) | |
95 | ||
42f811b8 | 96 | #define IN_DEV_MAXCONF(in_dev, attr) \ |
0598f8f3 | 97 | (max(IPV4_DEVCONF_ALL_RO(dev_net(in_dev->dev), attr), \ |
586f1211 | 98 | IN_DEV_CONF_GET((in_dev), attr))) |
42f811b8 HX |
99 | |
100 | #define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING) | |
01ecfe9b | 101 | #define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING) |
5cbf777c | 102 | #define IN_DEV_BFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), BC_FORWARDING) |
27fed417 | 103 | #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER) |
28f6aeea | 104 | #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK) |
42f811b8 HX |
105 | #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \ |
106 | ACCEPT_SOURCE_ROUTE) | |
8153a10c | 107 | #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL) |
42f811b8 HX |
108 | #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY) |
109 | ||
110 | #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS) | |
111 | #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP) | |
1af5318c | 112 | #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP_PVLAN) |
42f811b8 HX |
113 | #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA) |
114 | #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS) | |
115 | #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \ | |
116 | SECURE_REDIRECTS) | |
117 | #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG) | |
118 | #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID) | |
119 | #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \ | |
120 | IN_DEV_ORCONF((in_dev), \ | |
121 | PROMOTE_SECONDARIES) | |
d0daebc3 | 122 | #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET) |
9eb43e76 ED |
123 | #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \ |
124 | IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET) | |
1da177e4 LT |
125 | |
126 | #define IN_DEV_RX_REDIRECTS(in_dev) \ | |
127 | ((IN_DEV_FORWARD(in_dev) && \ | |
42f811b8 | 128 | IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \ |
1da177e4 | 129 | || (!IN_DEV_FORWARD(in_dev) && \ |
42f811b8 | 130 | IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS))) |
1da177e4 | 131 | |
0eeb075f | 132 | #define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \ |
c0c5a60f | 133 | IN_DEV_ORCONF((in_dev), IGNORE_ROUTES_WITH_LINKDOWN) |
0eeb075f | 134 | |
42f811b8 | 135 | #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER) |
e68c5dcf | 136 | #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ACCEPT) |
42f811b8 HX |
137 | #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE) |
138 | #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE) | |
eefef1cf | 139 | #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY) |
fcdb44d0 JP |
140 | #define IN_DEV_ARP_EVICT_NOCARRIER(in_dev) IN_DEV_ANDCONF((in_dev), \ |
141 | ARP_EVICT_NOCARRIER) | |
1da177e4 | 142 | |
d94d9fee | 143 | struct in_ifaddr { |
fd23c3b3 | 144 | struct hlist_node hash; |
2638eb8b | 145 | struct in_ifaddr __rcu *ifa_next; |
1da177e4 LT |
146 | struct in_device *ifa_dev; |
147 | struct rcu_head rcu_head; | |
a144ea4b AV |
148 | __be32 ifa_local; |
149 | __be32 ifa_address; | |
150 | __be32 ifa_mask; | |
af4d768a | 151 | __u32 ifa_rt_priority; |
a144ea4b | 152 | __be32 ifa_broadcast; |
1da177e4 | 153 | unsigned char ifa_scope; |
1da177e4 | 154 | unsigned char ifa_prefixlen; |
47f0bd50 | 155 | unsigned char ifa_proto; |
ad6c8135 | 156 | __u32 ifa_flags; |
1da177e4 | 157 | char ifa_label[IFNAMSIZ]; |
5c766d64 JP |
158 | |
159 | /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */ | |
160 | __u32 ifa_valid_lft; | |
161 | __u32 ifa_preferred_lft; | |
162 | unsigned long ifa_cstamp; /* created timestamp */ | |
163 | unsigned long ifa_tstamp; /* updated timestamp */ | |
1da177e4 LT |
164 | }; |
165 | ||
3ad7d246 KJ |
166 | struct in_validator_info { |
167 | __be32 ivi_addr; | |
168 | struct in_device *ivi_dev; | |
de95e047 | 169 | struct netlink_ext_ack *extack; |
3ad7d246 KJ |
170 | }; |
171 | ||
f629d208 JP |
172 | int register_inetaddr_notifier(struct notifier_block *nb); |
173 | int unregister_inetaddr_notifier(struct notifier_block *nb); | |
3ad7d246 KJ |
174 | int register_inetaddr_validator_notifier(struct notifier_block *nb); |
175 | int unregister_inetaddr_validator_notifier(struct notifier_block *nb); | |
1da177e4 | 176 | |
3b022865 DA |
177 | void inet_netconf_notify_devconf(struct net *net, int event, int type, |
178 | int ifindex, struct ipv4_devconf *devconf); | |
d67b8c61 | 179 | |
f629d208 | 180 | struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref); |
82efee14 ED |
181 | static inline struct net_device *ip_dev_find(struct net *net, __be32 addr) |
182 | { | |
183 | return __ip_dev_find(net, addr, true); | |
184 | } | |
185 | ||
f629d208 | 186 | int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b); |
03aef17b | 187 | int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *); |
b0e99d03 AB |
188 | #ifdef CONFIG_INET |
189 | int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size); | |
190 | #else | |
191 | static inline int inet_gifconf(struct net_device *dev, char __user *buf, | |
192 | int len, int size) | |
193 | { | |
194 | return 0; | |
195 | } | |
196 | #endif | |
f629d208 JP |
197 | void devinet_init(void); |
198 | struct in_device *inetdev_by_index(struct net *, int); | |
199 | __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope); | |
b601fa19 ND |
200 | __be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst, |
201 | __be32 local, int scope); | |
f629d208 JP |
202 | struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, |
203 | __be32 mask); | |
6e617de8 | 204 | struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr); |
ef11db33 | 205 | static inline bool inet_ifa_match(__be32 addr, const struct in_ifaddr *ifa) |
1da177e4 LT |
206 | { |
207 | return !((addr^ifa->ifa_address)&ifa->ifa_mask); | |
208 | } | |
209 | ||
210 | /* | |
211 | * Check if a mask is acceptable. | |
212 | */ | |
213 | ||
f06cc7b2 | 214 | static __inline__ bool bad_mask(__be32 mask, __be32 addr) |
1da177e4 | 215 | { |
714e85be | 216 | __u32 hmask; |
1da177e4 | 217 | if (addr & (mask = ~mask)) |
f06cc7b2 | 218 | return true; |
714e85be AV |
219 | hmask = ntohl(mask); |
220 | if (hmask & (hmask+1)) | |
f06cc7b2 YB |
221 | return true; |
222 | return false; | |
1da177e4 LT |
223 | } |
224 | ||
ef11db33 | 225 | #define in_dev_for_each_ifa_rtnl(ifa, in_dev) \ |
2638eb8b FW |
226 | for (ifa = rtnl_dereference((in_dev)->ifa_list); ifa; \ |
227 | ifa = rtnl_dereference(ifa->ifa_next)) | |
ef11db33 FW |
228 | |
229 | #define in_dev_for_each_ifa_rcu(ifa, in_dev) \ | |
2638eb8b FW |
230 | for (ifa = rcu_dereference((in_dev)->ifa_list); ifa; \ |
231 | ifa = rcu_dereference(ifa->ifa_next)) | |
ef11db33 | 232 | |
e5ed6399 HX |
233 | static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev) |
234 | { | |
95ae6b22 | 235 | return rcu_dereference(dev->ip_ptr); |
e5ed6399 HX |
236 | } |
237 | ||
95ae6b22 | 238 | static inline struct in_device *in_dev_get(const struct net_device *dev) |
1da177e4 LT |
239 | { |
240 | struct in_device *in_dev; | |
241 | ||
242 | rcu_read_lock(); | |
e5ed6399 | 243 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 | 244 | if (in_dev) |
7658b36f | 245 | refcount_inc(&in_dev->refcnt); |
1da177e4 LT |
246 | rcu_read_unlock(); |
247 | return in_dev; | |
248 | } | |
249 | ||
95ae6b22 | 250 | static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev) |
1da177e4 | 251 | { |
06a9701f | 252 | return rtnl_dereference(dev->ip_ptr); |
1da177e4 LT |
253 | } |
254 | ||
331c7a40 DA |
255 | /* called with rcu_read_lock or rtnl held */ |
256 | static inline bool ip_ignore_linkdown(const struct net_device *dev) | |
257 | { | |
258 | struct in_device *in_dev; | |
259 | bool rc = false; | |
260 | ||
261 | in_dev = rcu_dereference_rtnl(dev->ip_ptr); | |
262 | if (in_dev && | |
263 | IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev)) | |
264 | rc = true; | |
265 | ||
266 | return rc; | |
267 | } | |
268 | ||
1d4c8c29 JP |
269 | static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev) |
270 | { | |
271 | struct in_device *in_dev = __in_dev_get_rcu(dev); | |
272 | ||
273 | return in_dev ? in_dev->arp_parms : NULL; | |
274 | } | |
275 | ||
f629d208 | 276 | void in_dev_finish_destroy(struct in_device *idev); |
1da177e4 LT |
277 | |
278 | static inline void in_dev_put(struct in_device *idev) | |
279 | { | |
7658b36f | 280 | if (refcount_dec_and_test(&idev->refcnt)) |
1da177e4 LT |
281 | in_dev_finish_destroy(idev); |
282 | } | |
283 | ||
7658b36f RE |
284 | #define __in_dev_put(idev) refcount_dec(&(idev)->refcnt) |
285 | #define in_dev_hold(idev) refcount_inc(&(idev)->refcnt) | |
1da177e4 LT |
286 | |
287 | #endif /* __KERNEL__ */ | |
288 | ||
60cad5da | 289 | static __inline__ __be32 inet_make_mask(int logmask) |
1da177e4 LT |
290 | { |
291 | if (logmask) | |
84bc8868 | 292 | return htonl(~((1U<<(32-logmask))-1)); |
1da177e4 LT |
293 | return 0; |
294 | } | |
295 | ||
714e85be | 296 | static __inline__ int inet_mask_len(__be32 mask) |
1da177e4 | 297 | { |
714e85be AV |
298 | __u32 hmask = ntohl(mask); |
299 | if (!hmask) | |
1da177e4 | 300 | return 0; |
714e85be | 301 | return 32 - ffz(~hmask); |
1da177e4 LT |
302 | } |
303 | ||
304 | ||
305 | #endif /* _LINUX_INETDEVICE_H */ |