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authorWANG Cong <xiyou.wangcong@gmail.com>2017-05-08 20:12:13 +0300
committerDavid S. Miller <davem@davemloft.net>2017-05-09 00:31:24 +0300
commit242d3a49a2a1a71d8eb9f953db1bcaa9d698ce00 (patch)
tree7565ac4897777e242dc18c26896cb972720aba35 /include
parent29cee56c0be46ad01e78af104a06223c65ee0c67 (diff)
downloadlinux-242d3a49a2a1a71d8eb9f953db1bcaa9d698ce00.tar.xz
ipv6: reorder ip6_route_dev_notifier after ipv6_dev_notf
For each netns (except init_net), we initialize its null entry in 3 places: 1) The template itself, as we use kmemdup() 2) Code around dst_init_metrics() in ip6_route_net_init() 3) ip6_route_dev_notify(), which is supposed to initialize it after loopback registers Unfortunately the last one still happens in a wrong order because we expect to initialize net->ipv6.ip6_null_entry->rt6i_idev to net->loopback_dev's idev, thus we have to do that after we add idev to loopback. However, this notifier has priority == 0 same as ipv6_dev_notf, and ipv6_dev_notf is registered after ip6_route_dev_notifier so it is called actually after ip6_route_dev_notifier. This is similar to commit 2f460933f58e ("ipv6: initialize route null entry in addrconf_init()") which fixes init_net. Fix it by picking a smaller priority for ip6_route_dev_notifier. Also, we have to release the refcnt accordingly when unregistering loopback_dev because device exit functions are called before subsys exit functions. Acked-by: David Ahern <dsahern@gmail.com> Tested-by: David Ahern <dsahern@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/addrconf.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 2452e6449532..b43a4eec3cec 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -20,6 +20,8 @@
#define ADDRCONF_TIMER_FUZZ (HZ / 4)
#define ADDRCONF_TIMER_FUZZ_MAX (HZ)
+#define ADDRCONF_NOTIFY_PRIORITY 0
+
#include <linux/in.h>
#include <linux/in6.h>