diff options
| author | Matthieu Baerts (NGI0) <matttbe@kernel.org> | 2025-09-19 14:08:58 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-09-22 11:51:24 -0700 |
| commit | c9809f03c158f07eaa76c7dd3606fc0a184520f2 (patch) | |
| tree | 3272a0707a3ff2018a6868618e514f10159d7d55 | |
| parent | 35626012877b80436e0627feb16520db4f0ba53e (diff) | |
mptcp: pm: netlink: only add server-side attr when true
This attribute is a boolean. No need to add it to set it to 'false'.
Indeed, the default value when this attribute is not set is naturally
'false'. A few bytes can then be saved by not adding this attribute if
the connection is not on the server side.
This prepares the future deprecation of its attribute, in favour of a
new flag.
Reviewed-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250919-net-next-mptcp-server-side-flag-v1-1-a97a5d561a8b@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | Documentation/netlink/specs/mptcp_pm.yaml | 4 | ||||
| -rw-r--r-- | include/uapi/linux/mptcp_pm.h | 4 | ||||
| -rw-r--r-- | net/mptcp/pm_netlink.c | 4 | ||||
| -rwxr-xr-x | tools/testing/selftests/net/mptcp/userspace_pm.sh | 2 |
4 files changed, 8 insertions, 6 deletions
diff --git a/Documentation/netlink/specs/mptcp_pm.yaml b/Documentation/netlink/specs/mptcp_pm.yaml index d1b4829b580a..fc47a2931014 100644 --- a/Documentation/netlink/specs/mptcp_pm.yaml +++ b/Documentation/netlink/specs/mptcp_pm.yaml @@ -28,13 +28,13 @@ definitions: traffic-patterns it can take a long time until the MPTCP_EVENT_ESTABLISHED is sent. Attributes: token, family, saddr4 | saddr6, daddr4 | daddr6, sport, - dport, server-side, [flags]. + dport, [server-side], [flags]. - name: established doc: >- A MPTCP connection is established (can start new subflows). Attributes: token, family, saddr4 | saddr6, daddr4 | daddr6, sport, - dport, server-side, [flags]. + dport, [server-side], [flags]. - name: closed doc: >- diff --git a/include/uapi/linux/mptcp_pm.h b/include/uapi/linux/mptcp_pm.h index 7359d34da446..bf44a5cf5b5a 100644 --- a/include/uapi/linux/mptcp_pm.h +++ b/include/uapi/linux/mptcp_pm.h @@ -16,10 +16,10 @@ * good time to allocate memory and send ADD_ADDR if needed. Depending on the * traffic-patterns it can take a long time until the MPTCP_EVENT_ESTABLISHED * is sent. Attributes: token, family, saddr4 | saddr6, daddr4 | daddr6, - * sport, dport, server-side, [flags]. + * sport, dport, [server-side], [flags]. * @MPTCP_EVENT_ESTABLISHED: A MPTCP connection is established (can start new * subflows). Attributes: token, family, saddr4 | saddr6, daddr4 | daddr6, - * sport, dport, server-side, [flags]. + * sport, dport, [server-side], [flags]. * @MPTCP_EVENT_CLOSED: A MPTCP connection has stopped. Attribute: token. * @MPTCP_EVENT_ANNOUNCED: A new address has been announced by the peer. * Attributes: token, rem_id, family, daddr4 | daddr6 [, dport]. diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 483ddbb9ec40..33a6bf536c02 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -413,7 +413,9 @@ static int mptcp_event_created(struct sk_buff *skb, if (err) return err; - if (nla_put_u8(skb, MPTCP_ATTR_SERVER_SIDE, READ_ONCE(msk->pm.server_side))) + /* only set when it is the server side */ + if (READ_ONCE(msk->pm.server_side) && + nla_put_u8(skb, MPTCP_ATTR_SERVER_SIDE, 1)) return -EMSGSIZE; if (READ_ONCE(msk->pm.remote_deny_join_id0)) diff --git a/tools/testing/selftests/net/mptcp/userspace_pm.sh b/tools/testing/selftests/net/mptcp/userspace_pm.sh index 3d45991f24ed..87323942cb8a 100755 --- a/tools/testing/selftests/net/mptcp/userspace_pm.sh +++ b/tools/testing/selftests/net/mptcp/userspace_pm.sh @@ -241,7 +241,7 @@ make_connection() print_test "Established IP${is_v6} MPTCP Connection ns2 => ns1" if [ "${client_token}" != "" ] && [ "${server_token}" != "" ] && - [ "${client_serverside}" = 0 ] && [ "${server_serverside}" = 1 ] && + [ "${client_serverside:-0}" = 0 ] && [ "${server_serverside:-0}" = 1 ] && [ "${client_nojoin:-0}" = 0 ] && [ "${server_nojoin:-0}" = 1 ] then test_pass |