Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_INETDEVICE_H
2#define _LINUX_INETDEVICE_H
3
4#ifdef __KERNEL__
5
6#include <linux/bitmap.h>
7#include <linux/if.h>
8#include <linux/netdevice.h>
9#include <linux/rcupdate.h>
10#include <linux/timer.h>
11#include <linux/sysctl.h>
12#include <linux/rtnetlink.h>
13
14enum
15{
16 IPV4_DEVCONF_FORWARDING=1,
17 IPV4_DEVCONF_MC_FORWARDING,
18 IPV4_DEVCONF_PROXY_ARP,
19 IPV4_DEVCONF_ACCEPT_REDIRECTS,
20 IPV4_DEVCONF_SECURE_REDIRECTS,
21 IPV4_DEVCONF_SEND_REDIRECTS,
22 IPV4_DEVCONF_SHARED_MEDIA,
23 IPV4_DEVCONF_RP_FILTER,
24 IPV4_DEVCONF_ACCEPT_SOURCE_ROUTE,
25 IPV4_DEVCONF_BOOTP_RELAY,
26 IPV4_DEVCONF_LOG_MARTIANS,
27 IPV4_DEVCONF_TAG,
28 IPV4_DEVCONF_ARPFILTER,
29 IPV4_DEVCONF_MEDIUM_ID,
30 IPV4_DEVCONF_NOXFRM,
31 IPV4_DEVCONF_NOPOLICY,
32 IPV4_DEVCONF_FORCE_IGMP_VERSION,
33 IPV4_DEVCONF_ARP_ANNOUNCE,
34 IPV4_DEVCONF_ARP_IGNORE,
35 IPV4_DEVCONF_PROMOTE_SECONDARIES,
36 IPV4_DEVCONF_ARP_ACCEPT,
37 IPV4_DEVCONF_ARP_NOTIFY,
38 IPV4_DEVCONF_ACCEPT_LOCAL,
39 IPV4_DEVCONF_SRC_VMARK,
40 IPV4_DEVCONF_PROXY_ARP_PVLAN,
41 __IPV4_DEVCONF_MAX
42};
43
44struct ipv4_devconf {
45 void *sysctl;
46 int data[__IPV4_DEVCONF_MAX - 1];
47 DECLARE_BITMAP(state, __IPV4_DEVCONF_MAX - 1);
48};
49
50struct in_device {
51 struct net_device *dev;
52 atomic_t refcnt;
53 int dead;
54 struct in_ifaddr *ifa_list; /* IP ifaddr chain */
55 rwlock_t mc_list_lock;
56 struct ip_mc_list *mc_list; /* IP multicast filter chain */
57 int mc_count; /* Number of installed mcasts */
58 spinlock_t mc_tomb_lock;
59 struct ip_mc_list *mc_tomb;
60 unsigned long mr_v1_seen;
61 unsigned long mr_v2_seen;
62 unsigned long mr_maxdelay;
63 unsigned char mr_qrv;
64 unsigned char mr_gq_running;
65 unsigned char mr_ifc_count;
66 struct timer_list mr_gq_timer; /* general query timer */
67 struct timer_list mr_ifc_timer; /* interface change timer */
68
69 struct neigh_parms *arp_parms;
70 struct ipv4_devconf cnf;
71 struct rcu_head rcu_head;
72};
73
74#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
75#define IPV4_DEVCONF_ALL(net, attr) \
76 IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
77
78static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
79{
80 index--;
81 return in_dev->cnf.data[index];
82}
83
84static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
85 int val)
86{
87 index--;
88 set_bit(index, in_dev->cnf.state);
89 in_dev->cnf.data[index] = val;
90}
91
92static inline void ipv4_devconf_setall(struct in_device *in_dev)
93{
94 bitmap_fill(in_dev->cnf.state, __IPV4_DEVCONF_MAX - 1);
95}
96
97#define IN_DEV_CONF_GET(in_dev, attr) \
98 ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
99#define IN_DEV_CONF_SET(in_dev, attr, val) \
100 ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
101
102#define IN_DEV_ANDCONF(in_dev, attr) \
103 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
104 IN_DEV_CONF_GET((in_dev), attr))
105#define IN_DEV_ORCONF(in_dev, attr) \
106 (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) || \
107 IN_DEV_CONF_GET((in_dev), attr))
108#define IN_DEV_MAXCONF(in_dev, attr) \
109 (max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
110 IN_DEV_CONF_GET((in_dev), attr)))
111
112#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
113#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
114#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
115#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
116#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
117 ACCEPT_SOURCE_ROUTE)
118#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
119#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
120
121#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
122#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
123#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_CONF_GET(in_dev, PROXY_ARP_PVLAN)
124#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
125#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
126#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
127 SECURE_REDIRECTS)
128#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
129#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
130#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
131 IN_DEV_ORCONF((in_dev), \
132 PROMOTE_SECONDARIES)
133
134#define IN_DEV_RX_REDIRECTS(in_dev) \
135 ((IN_DEV_FORWARD(in_dev) && \
136 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
137 || (!IN_DEV_FORWARD(in_dev) && \
138 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
139
140#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
141#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
142#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
143#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
144
145struct in_ifaddr {
146 struct in_ifaddr *ifa_next;
147 struct in_device *ifa_dev;
148 struct rcu_head rcu_head;
149 __be32 ifa_local;
150 __be32 ifa_address;
151 __be32 ifa_mask;
152 __be32 ifa_broadcast;
153 unsigned char ifa_scope;
154 unsigned char ifa_flags;
155 unsigned char ifa_prefixlen;
156 char ifa_label[IFNAMSIZ];
157};
158
159extern int register_inetaddr_notifier(struct notifier_block *nb);
160extern int unregister_inetaddr_notifier(struct notifier_block *nb);
161
162extern struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
163static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
164{
165 return __ip_dev_find(net, addr, true);
166}
167
168extern int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
169extern int devinet_ioctl(struct net *net, unsigned int cmd, void __user *);
170extern void devinet_init(void);
171extern struct in_device *inetdev_by_index(struct net *, int);
172extern __be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
173extern __be32 inet_confirm_addr(struct in_device *in_dev, __be32 dst, __be32 local, int scope);
174extern struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix, __be32 mask);
175
176static __inline__ int inet_ifa_match(__be32 addr, struct in_ifaddr *ifa)
177{
178 return !((addr^ifa->ifa_address)&ifa->ifa_mask);
179}
180
181/*
182 * Check if a mask is acceptable.
183 */
184
185static __inline__ int bad_mask(__be32 mask, __be32 addr)
186{
187 __u32 hmask;
188 if (addr & (mask = ~mask))
189 return 1;
190 hmask = ntohl(mask);
191 if (hmask & (hmask+1))
192 return 1;
193 return 0;
194}
195
196#define for_primary_ifa(in_dev) { struct in_ifaddr *ifa; \
197 for (ifa = (in_dev)->ifa_list; ifa && !(ifa->ifa_flags&IFA_F_SECONDARY); ifa = ifa->ifa_next)
198
199#define for_ifa(in_dev) { struct in_ifaddr *ifa; \
200 for (ifa = (in_dev)->ifa_list; ifa; ifa = ifa->ifa_next)
201
202
203#define endfor_ifa(in_dev) }
204
205static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
206{
207 return rcu_dereference(dev->ip_ptr);
208}
209
210static inline struct in_device *in_dev_get(const struct net_device *dev)
211{
212 struct in_device *in_dev;
213
214 rcu_read_lock();
215 in_dev = __in_dev_get_rcu(dev);
216 if (in_dev)
217 atomic_inc(&in_dev->refcnt);
218 rcu_read_unlock();
219 return in_dev;
220}
221
222static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
223{
224 return rcu_dereference_check(dev->ip_ptr, lockdep_rtnl_is_held());
225}
226
227extern void in_dev_finish_destroy(struct in_device *idev);
228
229static inline void in_dev_put(struct in_device *idev)
230{
231 if (atomic_dec_and_test(&idev->refcnt))
232 in_dev_finish_destroy(idev);
233}
234
235#define __in_dev_put(idev) atomic_dec(&(idev)->refcnt)
236#define in_dev_hold(idev) atomic_inc(&(idev)->refcnt)
237
238#endif /* __KERNEL__ */
239
240static __inline__ __be32 inet_make_mask(int logmask)
241{
242 if (logmask)
243 return htonl(~((1<<(32-logmask))-1));
244 return 0;
245}
246
247static __inline__ int inet_mask_len(__be32 mask)
248{
249 __u32 hmask = ntohl(mask);
250 if (!hmask)
251 return 0;
252 return 32 - ffz(~hmask);
253}
254
255
256#endif /* _LINUX_INETDEVICE_H */