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authorJeff Barnhill <0xeffeff@gmail.com>2018-11-02 23:23:57 +0300
committerDavid S. Miller <davem@davemloft.net>2018-11-03 09:54:56 +0300
commit2384d02520ff2a916169b2fd85ea50e923ed56c2 (patch)
treebfad5bc2bff6bc70d8455db794c7b779cc81e9f1 /include/net/if_inet6.h
parent7b900ead6cc66b2ee873cb042dfba169aa68b56c (diff)
downloadlinux-2384d02520ff2a916169b2fd85ea50e923ed56c2.tar.xz
net/ipv6: Add anycast addresses to a global hashtable
icmp6_send() function is expensive on systems with a large number of interfaces. Every time it’s called, it has to verify that the source address does not correspond to an existing anycast address by looping through every device and every anycast address on the device. This can result in significant delays for a CPU when there are a large number of neighbors and ND timers are frequently timing out and calling neigh_invalidate(). Add anycast addresses to a global hashtable to allow quick searching for matching anycast addresses. This is based on inet6_addr_lst in addrconf.c. Signed-off-by: Jeff Barnhill <0xeffeff@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/if_inet6.h')
-rw-r--r--include/net/if_inet6.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/if_inet6.h b/include/net/if_inet6.h
index d7578cf49c3a..c9c78c15bce0 100644
--- a/include/net/if_inet6.h
+++ b/include/net/if_inet6.h
@@ -146,10 +146,12 @@ struct ifacaddr6 {
struct in6_addr aca_addr;
struct fib6_info *aca_rt;
struct ifacaddr6 *aca_next;
+ struct hlist_node aca_addr_lst;
int aca_users;
refcount_t aca_refcnt;
unsigned long aca_cstamp;
unsigned long aca_tstamp;
+ struct rcu_head rcu;
};
#define IFA_HOST IPV6_ADDR_LOOPBACK