Merge tag 'perf-tools-fixes-for-v6.9-2024-04-19' of git://git.kernel.org/pub/scm...
[linux-2.6-block.git] / include / linux / inetdevice.h
CommitLineData
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 17struct 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 25struct 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 61static 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
67static 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
75static 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 143struct 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
166struct 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
172int register_inetaddr_notifier(struct notifier_block *nb);
173int unregister_inetaddr_notifier(struct notifier_block *nb);
3ad7d246
KJ
174int register_inetaddr_validator_notifier(struct notifier_block *nb);
175int unregister_inetaddr_validator_notifier(struct notifier_block *nb);
1da177e4 176
3b022865
DA
177void inet_netconf_notify_devconf(struct net *net, int event, int type,
178 int ifindex, struct ipv4_devconf *devconf);
d67b8c61 179
f629d208 180struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
82efee14
ED
181static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
182{
183 return __ip_dev_find(net, addr, true);
184}
185
f629d208 186int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
03aef17b 187int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *);
b0e99d03
AB
188#ifdef CONFIG_INET
189int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size);
190#else
191static 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
197void devinet_init(void);
198struct 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
202struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
203 __be32 mask);
6e617de8 204struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr);
ef11db33 205static 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 214static __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
233static 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 238static 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 250static 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 */
256static 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
269static 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 276void in_dev_finish_destroy(struct in_device *idev);
1da177e4
LT
277
278static 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 289static __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 296static __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 */