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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/inetdevice.h
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 __rcu
*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
;
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_BFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), BC_FORWARDING)
99 #define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
100 #define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
101 #define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
103 #define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
104 #define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
106 #define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
107 #define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
108 #define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP_PVLAN)
109 #define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
110 #define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
111 #define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
113 #define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
114 #define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
115 #define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
116 IN_DEV_ORCONF((in_dev), \
118 #define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
119 #define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
120 IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
122 #define IN_DEV_RX_REDIRECTS(in_dev) \
123 ((IN_DEV_FORWARD(in_dev) && \
124 IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
125 || (!IN_DEV_FORWARD(in_dev) && \
126 IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
128 #define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
129 IN_DEV_ORCONF((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
131 #define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
132 #define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
133 #define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
134 #define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
135 #define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
138 struct hlist_node hash
;
139 struct in_ifaddr __rcu
*ifa_next
;
140 struct in_device
*ifa_dev
;
141 struct rcu_head rcu_head
;
145 __u32 ifa_rt_priority
;
146 __be32 ifa_broadcast
;
147 unsigned char ifa_scope
;
148 unsigned char ifa_prefixlen
;
150 char ifa_label
[IFNAMSIZ
];
152 /* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
154 __u32 ifa_preferred_lft
;
155 unsigned long ifa_cstamp
; /* created timestamp */
156 unsigned long ifa_tstamp
; /* updated timestamp */
159 struct in_validator_info
{
161 struct in_device
*ivi_dev
;
162 struct netlink_ext_ack
*extack
;
165 int register_inetaddr_notifier(struct notifier_block
*nb
);
166 int unregister_inetaddr_notifier(struct notifier_block
*nb
);
167 int register_inetaddr_validator_notifier(struct notifier_block
*nb
);
168 int unregister_inetaddr_validator_notifier(struct notifier_block
*nb
);
170 void inet_netconf_notify_devconf(struct net
*net
, int event
, int type
,
171 int ifindex
, struct ipv4_devconf
*devconf
);
173 struct net_device
*__ip_dev_find(struct net
*net
, __be32 addr
, bool devref
);
174 static inline struct net_device
*ip_dev_find(struct net
*net
, __be32 addr
)
176 return __ip_dev_find(net
, addr
, true);
179 int inet_addr_onlink(struct in_device
*in_dev
, __be32 a
, __be32 b
);
180 int devinet_ioctl(struct net
*net
, unsigned int cmd
, struct ifreq
*);
182 int inet_gifconf(struct net_device
*dev
, char __user
*buf
, int len
, int size
);
184 static inline int inet_gifconf(struct net_device
*dev
, char __user
*buf
,
190 void devinet_init(void);
191 struct in_device
*inetdev_by_index(struct net
*, int);
192 __be32
inet_select_addr(const struct net_device
*dev
, __be32 dst
, int scope
);
193 __be32
inet_confirm_addr(struct net
*net
, struct in_device
*in_dev
, __be32 dst
,
194 __be32 local
, int scope
);
195 struct in_ifaddr
*inet_ifa_byprefix(struct in_device
*in_dev
, __be32 prefix
,
197 struct in_ifaddr
*inet_lookup_ifaddr_rcu(struct net
*net
, __be32 addr
);
198 static inline bool inet_ifa_match(__be32 addr
, const struct in_ifaddr
*ifa
)
200 return !((addr
^ifa
->ifa_address
)&ifa
->ifa_mask
);
204 * Check if a mask is acceptable.
207 static __inline__
bool bad_mask(__be32 mask
, __be32 addr
)
210 if (addr
& (mask
= ~mask
))
213 if (hmask
& (hmask
+1))
218 #define in_dev_for_each_ifa_rtnl(ifa, in_dev) \
219 for (ifa = rtnl_dereference((in_dev)->ifa_list); ifa; \
220 ifa = rtnl_dereference(ifa->ifa_next))
222 #define in_dev_for_each_ifa_rcu(ifa, in_dev) \
223 for (ifa = rcu_dereference((in_dev)->ifa_list); ifa; \
224 ifa = rcu_dereference(ifa->ifa_next))
226 static inline struct in_device
*__in_dev_get_rcu(const struct net_device
*dev
)
228 return rcu_dereference(dev
->ip_ptr
);
231 static inline struct in_device
*in_dev_get(const struct net_device
*dev
)
233 struct in_device
*in_dev
;
236 in_dev
= __in_dev_get_rcu(dev
);
238 refcount_inc(&in_dev
->refcnt
);
243 static inline struct in_device
*__in_dev_get_rtnl(const struct net_device
*dev
)
245 return rtnl_dereference(dev
->ip_ptr
);
248 /* called with rcu_read_lock or rtnl held */
249 static inline bool ip_ignore_linkdown(const struct net_device
*dev
)
251 struct in_device
*in_dev
;
254 in_dev
= rcu_dereference_rtnl(dev
->ip_ptr
);
256 IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev
))
262 static inline struct neigh_parms
*__in_dev_arp_parms_get_rcu(const struct net_device
*dev
)
264 struct in_device
*in_dev
= __in_dev_get_rcu(dev
);
266 return in_dev
? in_dev
->arp_parms
: NULL
;
269 void in_dev_finish_destroy(struct in_device
*idev
);
271 static inline void in_dev_put(struct in_device
*idev
)
273 if (refcount_dec_and_test(&idev
->refcnt
))
274 in_dev_finish_destroy(idev
);
277 #define __in_dev_put(idev) refcount_dec(&(idev)->refcnt)
278 #define in_dev_hold(idev) refcount_inc(&(idev)->refcnt)
280 #endif /* __KERNEL__ */
282 static __inline__ __be32
inet_make_mask(int logmask
)
285 return htonl(~((1U<<(32-logmask
))-1));
289 static __inline__
int inet_mask_len(__be32 mask
)
291 __u32 hmask
= ntohl(mask
);
294 return 32 - ffz(~hmask
);
298 #endif /* _LINUX_INETDEVICE_H */