Re: [PATCH mptcp-net v2 0/2] mptcp: support MP_PRIO signals with userspace PMs

[Mat Martineau <mathew.j.martineau@linux.intel.com>]

On Thu, 23 Jun 2022, Mat Martineau wrote:

> On Wed, 22 Jun 2022, Kishen Maloor wrote:
>
>> This patch series updates MPTCP_PM_CMD_SET_FLAGS to allow userspace PMs
>> to issue MP_PRIO signals for a specified address ID over a chosen
>> MPTCP connection. It also adds self testing support for this change.
>> 
>> v2:
>> -userspace_pm.sh: added a sleep after issuing the MP_PRIO signal.
>
> Thanks Kishen. v2 looks good to me:
>
> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
>

I spoke too soon.

I was looking at the multipath-tcp.org API for changing the backup flag 
with Ossama, and that netlink command (MPTCP_CMD_SUB_PRIORITY) uses the 
local and remote addresses and port numbers rather than the endpoint IDs.

This is so the priority can be changed for an individual subflow. The 
API parameters I asked for in issue 286 would only allow priority to be 
changed for all subflows using a specific local endpoint, which is not 
specific enough.

I'll update https://github.com/multipath-tcp/mptcp_net-next/issues/286 
to request a change to the MPTCP_PM_CMD_SET_FLAGS parameters.

>> 
>> Kishen Maloor (2):
>>  mptcp: netlink: issue MP_PRIO signals from userspace PMs
>>  selftests: mptcp: userspace PM support for MP_PRIO signals
>> 
>> net/mptcp/pm_netlink.c                        | 23 +++++++++----
>> net/mptcp/pm_userspace.c                      | 30 +++++++++++++++++
>> net/mptcp/protocol.h                          |  6 +++-
>> tools/testing/selftests/net/mptcp/pm_nl_ctl.c | 19 +++++++++--
>> .../selftests/net/mptcp/userspace_pm.sh       | 32 +++++++++++++++++++
>> 5 files changed, 101 insertions(+), 9 deletions(-)
>> 
>> 
>> base-commit: 68fec8b7f640037e4bf224ca4e924574098f5911
>> --
>> 2.31.1
>> 
>>

--
Mat Martineau
Intel