diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2014-12-22 18:56:37 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-12-27 02:20:23 -0500 |
| commit | b10dcb3b94010e3ac3951f68789400b1665effb1 (patch) | |
| tree | 5ec269ffbedc0117a3246ad32691b78e03402abd /net | |
| parent | f8403a2e47afb37bcd3b7e286996d138a116c39d (diff) | |
| download | linux-stable-b10dcb3b94010e3ac3951f68789400b1665effb1.tar.gz linux-stable-b10dcb3b94010e3ac3951f68789400b1665effb1.tar.bz2 linux-stable-b10dcb3b94010e3ac3951f68789400b1665effb1.zip | |
netlink: update listeners directly when removing socket
The code is now confusing to read - first in one function down
(netlink_remove) any group subscriptions are implicitly removed
by calling __sk_del_bind_node(), but the subscriber database is
only updated far later by calling netlink_update_listeners().
Move the latter call to just after removal from the list so it
is easier to follow the code.
This also enables moving the locking inside the kernel-socket
conditional, which improves the normal socket destruction path.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netlink/af_netlink.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index b4cf8ee0e1b8..6a9fb7c489a8 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1091,8 +1091,10 @@ static void netlink_remove(struct sock *sk) mutex_unlock(&nl_sk_hash_lock); netlink_table_grab(); - if (nlk_sk(sk)->subscriptions) + if (nlk_sk(sk)->subscriptions) { __sk_del_bind_node(sk); + netlink_update_listeners(sk); + } netlink_table_ungrab(); } @@ -1226,8 +1228,8 @@ static int netlink_release(struct socket *sock) module_put(nlk->module); - netlink_table_grab(); if (netlink_is_kernel(sk)) { + netlink_table_grab(); BUG_ON(nl_table[sk->sk_protocol].registered == 0); if (--nl_table[sk->sk_protocol].registered == 0) { struct listeners *old; @@ -1241,10 +1243,8 @@ static int netlink_release(struct socket *sock) nl_table[sk->sk_protocol].flags = 0; nl_table[sk->sk_protocol].registered = 0; } - } else if (nlk->subscriptions) { - netlink_update_listeners(sk); + netlink_table_ungrab(); } - netlink_table_ungrab(); kfree(nlk->groups); nlk->groups = NULL; |