diff options
| author | Pravin B Shelar <pshelar@nicira.com> | 2013-04-25 11:08:30 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-04-29 13:54:36 -0400 |
| commit | 5f5624cf156283687e11ea329c7a0523c677ea0e (patch) | |
| tree | b9a95bfab72e5fd1ec3964f338770bdb1da55861 /net/ipv6/ip6_icmp.c | |
| parent | a4c4009f4f54dabaaea1bb2b2c3c8930e93cd409 (diff) | |
ipv6: Kill ipv6 dependency of icmpv6_send().
Following patch adds icmp-registration module for ipv6. It allows
ipv6 protocol to register icmp_sender which is used for sending
ipv6 icmp msgs. This extra layer allows us to kill ipv6 dependency
for sending icmp packets.
This patch also fixes ip_tunnel compilation problem when ip_tunnel
is statically compiled in kernel but ipv6 is module
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_icmp.c')
| -rw-r--r-- | net/ipv6/ip6_icmp.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/net/ipv6/ip6_icmp.c b/net/ipv6/ip6_icmp.c new file mode 100644 index 000000000000..4578e23834f7 --- /dev/null +++ b/net/ipv6/ip6_icmp.c @@ -0,0 +1,47 @@ +#include <linux/export.h> +#include <linux/icmpv6.h> +#include <linux/mutex.h> +#include <linux/netdevice.h> +#include <linux/spinlock.h> + +#include <net/ipv6.h> + +#if IS_ENABLED(CONFIG_IPV6) + +static ip6_icmp_send_t __rcu *ip6_icmp_send; + +int inet6_register_icmp_sender(ip6_icmp_send_t *fn) +{ + return (cmpxchg((ip6_icmp_send_t **)&ip6_icmp_send, NULL, fn) == NULL) ? + 0 : -EBUSY; +} +EXPORT_SYMBOL(inet6_register_icmp_sender); + +int inet6_unregister_icmp_sender(ip6_icmp_send_t *fn) +{ + int ret; + + ret = (cmpxchg((ip6_icmp_send_t **)&ip6_icmp_send, fn, NULL) == fn) ? + 0 : -EINVAL; + + synchronize_net(); + + return ret; +} +EXPORT_SYMBOL(inet6_unregister_icmp_sender); + +void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info) +{ + ip6_icmp_send_t *send; + + rcu_read_lock(); + send = rcu_dereference(ip6_icmp_send); + + if (!send) + goto out; + send(skb, type, code, info); +out: + rcu_read_unlock(); +} +EXPORT_SYMBOL(icmpv6_send); +#endif |