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| author | Jeff Barnhill <0xeffeff@gmail.com> | 2018-11-02 20:23:57 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-11-02 23:54:56 -0700 |
| commit | 2384d02520ff2a916169b2fd85ea50e923ed56c2 (patch) | |
| tree | bfad5bc2bff6bc70d8455db794c7b779cc81e9f1 /net/ipv6/af_inet6.c | |
| parent | 7b900ead6cc66b2ee873cb042dfba169aa68b56c (diff) | |
| download | lwn-2384d02520ff2a916169b2fd85ea50e923ed56c2.tar.gz lwn-2384d02520ff2a916169b2fd85ea50e923ed56c2.zip | |
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 'net/ipv6/af_inet6.c')
| -rw-r--r-- | net/ipv6/af_inet6.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 3f4d61017a69..f0cd291034f0 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -1001,6 +1001,9 @@ static int __init inet6_init(void) err = ip6_flowlabel_init(); if (err) goto ip6_flowlabel_fail; + err = ipv6_anycast_init(); + if (err) + goto ipv6_anycast_fail; err = addrconf_init(); if (err) goto addrconf_fail; @@ -1091,6 +1094,8 @@ ipv6_frag_fail: ipv6_exthdrs_fail: addrconf_cleanup(); addrconf_fail: + ipv6_anycast_cleanup(); +ipv6_anycast_fail: ip6_flowlabel_cleanup(); ip6_flowlabel_fail: ndisc_late_cleanup(); |