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authorNicolas Dichtel <nicolas.dichtel@6wind.com>2017-11-14 14:21:32 +0100
committerDavid S. Miller <davem@davemloft.net>2017-11-15 13:56:45 +0900
commit094009531612246d9e13f9e0c3ae2205d7f63a0a (patch)
tree161c9a7e20ca78b6d622a58fc7f7b20393332fb3 /net
parentb9f3eb499d84f8d4adcb2f9212ec655700b28228 (diff)
downloadop-kernel-dev-094009531612246d9e13f9e0c3ae2205d7f63a0a.zip
op-kernel-dev-094009531612246d9e13f9e0c3ae2205d7f63a0a.tar.gz
ipv6: set all.accept_dad to 0 by default
With commits 35e015e1f577 and a2d3f3e33853, the global 'accept_dad' flag is also taken into account (default value is 1). If either global or per-interface flag is non-zero, DAD will be enabled on a given interface. This is not backward compatible: before those patches, the user could disable DAD just by setting the per-interface flag to 0. Now, the user instead needs to set both flags to 0 to actually disable DAD. Restore the previous behaviour by setting the default for the global 'accept_dad' flag to 0. This way, DAD is still enabled by default, as per-interface flags are set to 1 on device creation, but setting them to 0 is enough to disable DAD on a given interface. - Before 35e015e1f57a7 and a2d3f3e33853: global per-interface DAD enabled [default] 1 1 yes X 0 no X 1 yes - After 35e015e1f577 and a2d3f3e33853: global per-interface DAD enabled [default] 1 1 yes 0 0 no 0 1 yes 1 0 yes - After this fix: global per-interface DAD enabled 1 1 yes 0 0 no [default] 0 1 yes 1 0 yes Fixes: 35e015e1f577 ("ipv6: fix net.ipv6.conf.all interface DAD handlers") Fixes: a2d3f3e33853 ("ipv6: fix net.ipv6.conf.all.accept_dad behaviour for real") CC: Stefano Brivio <sbrivio@redhat.com> CC: Matteo Croce <mcroce@redhat.com> CC: Erik Kline <ek@google.com> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Acked-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/addrconf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index a6dffd6..a0ae1c9 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -231,7 +231,7 @@ static struct ipv6_devconf ipv6_devconf __read_mostly = {
.proxy_ndp = 0,
.accept_source_route = 0, /* we do not accept RH0 by default. */
.disable_ipv6 = 0,
- .accept_dad = 1,
+ .accept_dad = 0,
.suppress_frag_ndisc = 1,
.accept_ra_mtu = 1,
.stable_secret = {
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