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authorFlorian Westphal <fw@strlen.de>2020-03-27 22:48:50 +0100
committerDavid S. Miller <davem@davemloft.net>2020-03-30 07:14:49 +0200
commitfc518953bc9c8d7d33c6ab261995f5038f3c87f9 (patch)
tree9c4eebd575e693916feb8d234411d08a17ec430a /scripts/mksysmap
parentmptcp: allow dumping subflow context to userspace (diff)
downloadlinux-fc518953bc9c8d7d33c6ab261995f5038f3c87f9.tar.xz
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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>
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