This MIB counter is similar to the one of TCP -- CurrEstab -- available
in /proc/net/snmp. This is useful to quickly list the number of MPTCP
connections without having to iterate over all of them.
Patch 1 prepares its support by adding new helper functions:
- MPTCP_DEC_STATS(): similar to MPTCP_INC_STATS(), but this time to
decrement a counter.
- mptcp_set_state(): similar to tcp_set_state(), to change the state of
an MPTCP socket, and to inc/decrement the new counter when needed.
Patch 2 uses mptcp_set_state() instead of directly calling
inet_sk_state_store() to change the state of MPTCP sockets.
Patch 3 and 4 validate the new feature in MPTCP "join" and "diag"
selftests.
Signed-off-by: Matthieu Baerts <matttbe@xxxxxxxxxx>
---
Geliang Tang (4):
mptcp: add CurrEstab MIB counter support
mptcp: use mptcp_set_state
selftests: mptcp: join: check CURRESTAB counters
selftests: mptcp: diag: check CURRESTAB counters
net/mptcp/mib.c | 1 +
net/mptcp/mib.h | 8 ++++
net/mptcp/pm_netlink.c | 5 +++
net/mptcp/protocol.c | 56 ++++++++++++++++---------
net/mptcp/protocol.h | 1 +
net/mptcp/subflow.c | 2 +-
tools/testing/selftests/net/mptcp/diag.sh | 17 +++++++-
tools/testing/selftests/net/mptcp/mptcp_join.sh | 46 +++++++++++++++++---
8 files changed, 110 insertions(+), 26 deletions(-)
---
base-commit: 56794e5358542b7c652f202946e53bfd2373b5e0
change-id: 20231221-upstream-net-next-20231221-mptcp-currestab-5a2867b4020b
Best regards,
--
Matthieu Baerts <matttbe@xxxxxxxxxx>
