diff options
| author | Petr Machata | 2018-08-01 00:36:42 +0200 |
|---|---|---|
| committer | David S. Miller | 2018-08-01 09:52:30 -0700 |
| commit | d18c5d1995aa322b722fa731397e28ebcd00b3c6 (patch) | |
| tree | e996b01d0941cbf65c04774c4ae2c999511bb547 | |
| parent | 432e05d328921c68c35bfdeff7d7b7400b8e3d1a (diff) | |
net: ipv4: Notify about changes to ip_forward_update_priority
Drivers may make offloading decision based on whether
ip_forward_update_priority is enabled or not. Therefore distribute
netevent notifications to give them a chance to react to a change.
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/netevent.h | 1 | ||||
| -rw-r--r-- | net/ipv4/sysctl_net_ipv4.c | 19 |
2 files changed, 19 insertions, 1 deletions
diff --git a/include/net/netevent.h b/include/net/netevent.h index d9918261701c..4107016c3bb4 100644 --- a/include/net/netevent.h +++ b/include/net/netevent.h @@ -28,6 +28,7 @@ enum netevent_notif_type { NETEVENT_DELAY_PROBE_TIME_UPDATE, /* arg is struct neigh_parms ptr */ NETEVENT_IPV4_MPATH_HASH_UPDATE, /* arg is struct net ptr */ NETEVENT_IPV6_MPATH_HASH_UPDATE, /* arg is struct net ptr */ + NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE, /* arg is struct net ptr */ }; int register_netevent_notifier(struct notifier_block *nb); diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c index e21dda015513..b92f422f2fa8 100644 --- a/net/ipv4/sysctl_net_ipv4.c +++ b/net/ipv4/sysctl_net_ipv4.c @@ -201,6 +201,23 @@ static int ipv4_ping_group_range(struct ctl_table *table, int write, return ret; } +static int ipv4_fwd_update_priority(struct ctl_table *table, int write, + void __user *buffer, + size_t *lenp, loff_t *ppos) +{ + struct net *net; + int ret; + + net = container_of(table->data, struct net, + ipv4.sysctl_ip_fwd_update_priority); + ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); + if (write && ret == 0) + call_netevent_notifiers(NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE, + net); + + return ret; +} + static int proc_tcp_congestion_control(struct ctl_table *ctl, int write, void __user *buffer, size_t *lenp, loff_t *ppos) { @@ -668,7 +685,7 @@ static struct ctl_table ipv4_net_table[] = { .data = &init_net.ipv4.sysctl_ip_fwd_update_priority, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = proc_dointvec_minmax, + .proc_handler = ipv4_fwd_update_priority, .extra1 = &zero, .extra2 = &one, }, |