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Date: Mon, 27 Apr 2020 15:06:34 -0600 From: David Ahern <dsahern@...il.com> To: Roopa Prabhu <roopa@...ulusnetworks.com>, davem@...emloft.net Cc: netdev@...r.kernel.org, rdunlap@...radead.org, nikolay@...ulusnetworks.com, bpoirier@...ulusnetworks.com Subject: Re: [PATCH net-next v4 2/3] net: ipv4: add sysctl for nexthop api compatibility mode On 4/27/20 2:56 PM, Roopa Prabhu wrote: > From: Roopa Prabhu <roopa@...ulusnetworks.com> > > Current route nexthop API maintains user space compatibility > with old route API by default. Dumps and netlink notifications > support both new and old API format. In systems which have > moved to the new API, this compatibility mode cancels some > of the performance benefits provided by the new nexthop API. > > This patch adds new sysctl nexthop_compat_mode which is on > by default but provides the ability to turn off compatibility > mode allowing systems to run entirely with the new routing > API. Old route API behaviour and support is not modified by this > sysctl. > > Uses a single sysctl to cover both ipv4 and ipv6 following > other sysctls. Covers dumps and delete notifications as > suggested by David Ahern. > > Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com> > --- > Documentation/networking/ip-sysctl.txt | 12 ++++++++++++ > include/net/netns/ipv4.h | 2 ++ > net/ipv4/af_inet.c | 1 + > net/ipv4/fib_semantics.c | 3 +++ > net/ipv4/nexthop.c | 5 +++-- > net/ipv4/sysctl_net_ipv4.c | 9 +++++++++ > net/ipv6/route.c | 3 ++- > 7 files changed, 32 insertions(+), 3 deletions(-) > Reviewed-by: David Ahern <dsahern@...il.com>
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