diff options
| author | Ido Schimmel <idosch@mellanox.com> | 2016-12-03 16:45:06 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-12-03 19:29:35 -0500 |
| commit | cacaad11f43aefbbe5fca00af3b9c16e6aee1ba4 (patch) | |
| tree | ca7600f9e865f6bfef8ce60a9c1d1ddd34acba96 /include/net | |
| parent | d3f706f68e2fd93f1172fe7fd6f16ba70cc52b31 (diff) | |
ipv4: fib: Allow for consistent FIB dumping
The next patch will enable listeners of the FIB notification chain to
request a dump of the FIB tables. However, since RTNL isn't taken during
the dump, it's possible for the FIB tables to change mid-dump, which
will result in inconsistency between the listener's table and the
kernel's.
Allow listeners to know about changes that occurred mid-dump, by adding
a change sequence counter to each net namespace. The counter is
incremented just before a notification is sent in the FIB chain.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/netns/ipv4.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h index 7adf4386ac8f..f0cf5a1b777e 100644 --- a/include/net/netns/ipv4.h +++ b/include/net/netns/ipv4.h @@ -135,6 +135,9 @@ struct netns_ipv4 { #ifdef CONFIG_IP_ROUTE_MULTIPATH int sysctl_fib_multipath_use_neigh; #endif + + unsigned int fib_seq; /* protected by rtnl_mutex */ + atomic_t rt_genid; }; #endif |