diff options
| author |   Florian Westphal <fw@strlen.de> | 2020-03-27 14:48:50 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-03-29 22:14:49 -0700 |
| commit | fc518953bc9c8d7d33c6ab261995f5038f3c87f9 (patch) | |
| tree | 9c4eebd575e693916feb8d234411d08a17ec430a /net/ipv4/af_inet.c | |
| parent | mptcp: allow dumping subflow context to userspace (diff) | |
| download | wireguard-linux-fc518953bc9c8d7d33c6ab261995f5038f3c87f9.tar.xz wireguard-linux-fc518953bc9c8d7d33c6ab261995f5038f3c87f9.zip | |
mptcp: add and use MIB counter infrastructure
Exported via same /proc file as the Linux TCP MIB counters, so "netstat -s"
or "nstat" will show them automatically.
The MPTCP MIB counters are allocated in a distinct pcpu area in order to
avoid bloating/wasting TCP pcpu memory.
Counters are allocated once the first MPTCP socket is created in a
network namespace and free'd on exit.
If no sockets have been allocated, all-zero mptcp counters are shown.
The MIB counter list is taken from the multipath-tcp.org kernel, but
only a few counters have been picked up so far. The counter list can
be increased at any time later on.
v2 -> v3:
- remove 'inline' in foo.c files (David S. Miller)
Co-developed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/af_inet.c')
| -rw-r--r-- | net/ipv4/af_inet.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index bd7b4e92e07f..cf58e29cf746 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1793,6 +1793,10 @@ static __net_exit void ipv4_mib_exit_net(struct net *net) free_percpu(net->mib.net_statistics); free_percpu(net->mib.ip_statistics); free_percpu(net->mib.tcp_statistics); +#ifdef CONFIG_MPTCP + /* allocated on demand, see mptcp_init_sock() */ + free_percpu(net->mib.mptcp_statistics); +#endif } static __net_initdata struct pernet_operations ipv4_mib_ops = { |