This series from the MPTCP tree adds genl multicast events that are important for implementing a userspace path manager. In MPTCP, a path manager is responsible for adding or removing additional subflows on each MPTCP connection. The in-kernel path manager (already part of the kernel) is a better fit for many server use cases, but the additional flexibility of userspace path managers is often useful for client devices.
Patches 1, 2, 4, 5, and 6 do some refactoring to streamline the netlink event implementation in the final patch. Patch 3 improves the timeliness of subflow destruction to ensure the 'subflow closed' event will be sent soon enough. Patch 7 allows use of the GENL_UNS_ADMIN_PERM flag on genl mcast groups to mandate CAP_NET_ADMIN, which is important to protect token information in the MPTCP events. This is a genetlink change. Patch 8 adds the MPTCP netlink events. Florian Westphal (8): mptcp: move pm netlink work into pm_netlink mptcp: split __mptcp_close_ssk helper mptcp: schedule worker when subflow is closed mptcp: move subflow close loop after sk close check mptcp: pass subflow socket to a few helpers mptcp: avoid lock_fast usage in accept path genetlink: add CAP_NET_ADMIN test for multicast bind mptcp: add netlink event support include/net/genetlink.h | 1 + include/uapi/linux/mptcp.h | 74 +++++++++ net/mptcp/options.c | 2 +- net/mptcp/pm.c | 24 ++- net/mptcp/pm_netlink.c | 310 ++++++++++++++++++++++++++++++++++++- net/mptcp/protocol.c | 72 ++++----- net/mptcp/protocol.h | 20 +-- net/mptcp/subflow.c | 27 +++- net/netlink/genetlink.c | 32 ++++ 9 files changed, 491 insertions(+), 71 deletions(-) base-commit: c3ff3b02e99c691197a05556ef45f5c3dd2ed3d6 -- 2.30.1
