diff options
author | Ido Schimmel <idosch@nvidia.com> | 2021-03-11 19:03:20 +0100 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2021-03-11 16:13:00 -0800 |
commit | cfc15c1dbb0b7574498eef453b8ddb534e408551 (patch) | |
tree | 8b672cf9fcc0e9f51c8d856366f7c3af587b55f5 /net | |
parent | 56ad5ba344dea9c914331da8754f5ba7cede9941 (diff) | |
download | linux-cfc15c1dbb0b7574498eef453b8ddb534e408551.tar.bz2 |
nexthop: Allow reporting activity of nexthop buckets
The kernel periodically checks the idle time of nexthop buckets to
determine if they are idle and can be re-populated with a new nexthop.
When the resilient nexthop group is offloaded to hardware, the kernel
will not see activity on nexthop buckets unless it is reported from
hardware.
Add a function that can be periodically called by device drivers to
report activity on nexthop buckets after querying it from the underlying
device.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r-- | net/ipv4/nexthop.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 1fce4ff39390..495b5e69ffcd 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -3106,6 +3106,41 @@ out: } EXPORT_SYMBOL(nexthop_bucket_set_hw_flags); +void nexthop_res_grp_activity_update(struct net *net, u32 id, u16 num_buckets, + unsigned long *activity) +{ + struct nh_res_table *res_table; + struct nexthop *nexthop; + struct nh_group *nhg; + u16 i; + + rcu_read_lock(); + + nexthop = nexthop_find_by_id(net, id); + if (!nexthop || !nexthop->is_group) + goto out; + + nhg = rcu_dereference(nexthop->nh_grp); + if (!nhg->resilient) + goto out; + + /* Instead of silently ignoring some buckets, demand that the sizes + * be the same. + */ + res_table = rcu_dereference(nhg->res_table); + if (num_buckets != res_table->num_nh_buckets) + goto out; + + for (i = 0; i < num_buckets; i++) { + if (test_bit(i, activity)) + nh_res_bucket_set_busy(&res_table->nh_buckets[i]); + } + +out: + rcu_read_unlock(); +} +EXPORT_SYMBOL(nexthop_res_grp_activity_update); + static void __net_exit nexthop_net_exit(struct net *net) { rtnl_lock(); |