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| author | Geliang Tang <[email protected]> | 2025-07-18 22:06:58 +0000 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2025-07-22 00:48:33 +0000 |
| commit | 51c5fd09e1b457eed103a22893603fb83a818162 (patch) | |
| tree | 3feb12435cd51cba37fc64fac3e14791b9513871 /tools/testing/selftests/drivers/net/hw/rss_api.py | |
| parent | tcp: add tcp_sock_set_maxseg (diff) | |
| download | kernel-51c5fd09e1b457eed103a22893603fb83a818162.tar.gz kernel-51c5fd09e1b457eed103a22893603fb83a818162.zip | |
mptcp: add TCP_MAXSEG sockopt support
The TCP_MAXSEG socket option is currently not supported by MPTCP, mainly
because it has never been requested before. But there are still valid
use-cases, e.g. with HAProxy.
This patch adds its support in MPTCP by propagating the value to all
subflows. The get part looks at the value on the first subflow, to be as
closed as possible to TCP. Only one value can be returned for the cached
MSS, so this can come only from one subflow.
Similar to mptcp_setsockopt_first_sf_only(), a generic helper
mptcp_setsockopt_all_subflows() is added to set sockopt for each
subflows of the mptcp socket.
Add a new member for struct mptcp_sock to store the TCP_MAXSEG value,
and return this value in getsockopt.
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/515
Signed-off-by: Geliang Tang <[email protected]>
Reviewed-by: Matthieu Baerts (NGI0) <[email protected]>
Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'tools/testing/selftests/drivers/net/hw/rss_api.py')
0 files changed, 0 insertions, 0 deletions