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authorPeter Pan(潘卫平) <panweiping3@gmail.com>2011-12-01 15:47:06 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-01 21:46:12 -0500
commitd01ff0a049f749e0bf10a35bb23edd012718c8c2 (patch)
tree84525ced20b7a48c17d26d73cd79dc86ee045738
parent1ee5fa1e9970a16036e37c7b9d5ce81c778252fc (diff)
downloadlinux-linaro-stable-d01ff0a049f749e0bf10a35bb23edd012718c8c2.tar.gz
ipv4: flush route cache after change accept_local
After reset ipv4_devconf->data[IPV4_DEVCONF_ACCEPT_LOCAL] to 0, we should flush route cache, or it will continue receive packets with local source address, which should be dropped. Signed-off-by: Weiping Pan <panweiping3@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/devinet.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index c6b5092f29a1..65f01dc47565 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1490,7 +1490,9 @@ static int devinet_conf_proc(ctl_table *ctl, int write,
void __user *buffer,
size_t *lenp, loff_t *ppos)
{
+ int old_value = *(int *)ctl->data;
int ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
+ int new_value = *(int *)ctl->data;
if (write) {
struct ipv4_devconf *cnf = ctl->extra1;
@@ -1501,6 +1503,9 @@ static int devinet_conf_proc(ctl_table *ctl, int write,
if (cnf == net->ipv4.devconf_dflt)
devinet_copy_dflt_conf(net, i);
+ if (i == IPV4_DEVCONF_ACCEPT_LOCAL - 1)
+ if ((new_value == 0) && (old_value != 0))
+ rt_cache_flush(net, 0);
}
return ret;