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| author | WANG Cong <xiyou.wangcong@gmail.com> | 2017-05-08 10:12:13 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-08 17:31:24 -0400 |
| commit | 242d3a49a2a1a71d8eb9f953db1bcaa9d698ce00 (patch) | |
| tree | 7565ac4897777e242dc18c26896cb972720aba35 /include/net/addrconf.h | |
| parent | 29cee56c0be46ad01e78af104a06223c65ee0c67 (diff) | |
| download | lwn-242d3a49a2a1a71d8eb9f953db1bcaa9d698ce00.tar.gz lwn-242d3a49a2a1a71d8eb9f953db1bcaa9d698ce00.zip | |
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/net/addrconf.h')
| -rw-r--r-- | include/net/addrconf.h | 2 |
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> |