| Message ID | d1e3bab356ae50c7e716721ed63d3ffeae91a451.1615387786.git.petrm@nvidia.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | nexthop: Resilient next-hop groups | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Link |
| netdev/fixes_present | success | Link |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Clearly marked for net-next |
| netdev/subject_prefix | success | Link |
| netdev/cc_maintainers | warning | 1 maintainers not CCed: yoshfuji@linux-ipv6.org |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Link |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 636 this patch: 636 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | Link |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 49 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 661 this patch: 661 |
| netdev/header_inline | success | Link |
On 3/10/21 8:03 AM, Petr Machata wrote: > From: Ido Schimmel <idosch@nvidia.com> > > 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> > Signed-off-by: Petr Machata <petrm@nvidia.com> > --- > > Notes: > v1 (changes since RFC): > - u32 -> u16 for bucket counts / indices > > include/net/nexthop.h | 2 ++ > net/ipv4/nexthop.c | 35 +++++++++++++++++++++++++++++++++++ > 2 files changed, 37 insertions(+) > Reviewed-by: David Ahern <dsahern@kernel.org>
diff --git a/include/net/nexthop.h b/include/net/nexthop.h index 685f208d26b5..ba94868a21d5 100644 --- a/include/net/nexthop.h +++ b/include/net/nexthop.h @@ -222,6 +222,8 @@ int unregister_nexthop_notifier(struct net *net, struct notifier_block *nb); void nexthop_set_hw_flags(struct net *net, u32 id, bool offload, bool trap); void nexthop_bucket_set_hw_flags(struct net *net, u32 id, u16 bucket_index, bool offload, bool trap); +void nexthop_res_grp_activity_update(struct net *net, u32 id, u16 num_buckets, + unsigned long *activity); /* caller is holding rcu or rtnl; no reference taken to nexthop */ struct nexthop *nexthop_find_by_id(struct net *net, u32 id); 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 @@ void nexthop_bucket_set_hw_flags(struct net *net, u32 id, u16 bucket_index, } 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();