[mptcp-next,0/3] BPF path manager, part 4

Message

Geliang Tang Jan. 15, 2025, 7:08 a.m. UTC

From: Geliang Tang <[e-mail]>

get_addr() and dump_addr() interfaces of BPF userspace pm are dropped
as Matt suggested.

Based-on: <[e-mail]>

In order to implement BPF userspace path manager, it is necessary to
unify the interfaces of the path manager. This set contains some
cleanups and refactoring to unify the interfaces in kernel space.
Finally, define a struct mptcp_pm_ops for a userspace path manager
like this:

struct mptcp_pm_ops {
	int (*address_announce)(struct mptcp_sock *msk,
				struct mptcp_pm_addr_entry *local);
	int (*address_remove)(struct mptcp_sock *msk, u8 id);
	int (*subflow_create)(struct mptcp_sock *msk,
			      struct mptcp_pm_addr_entry *local,
			      struct mptcp_addr_info *remote);
	int (*subflow_destroy)(struct mptcp_sock *msk,
			       struct mptcp_pm_addr_entry *local,
			       struct mptcp_addr_info *remote);
	int (*get_local_id)(struct mptcp_sock *msk,
			    struct mptcp_pm_addr_entry *local);
	u8 (*get_flags)(struct mptcp_sock *msk,
			struct mptcp_addr_info *skc);
	int (*set_flags)(struct mptcp_sock *msk,
			 struct mptcp_pm_addr_entry *local,
			 struct mptcp_addr_info *remote);

	u8			type;
	struct module		*owner;
	struct list_head	list;

	void (*init)(struct mptcp_sock *msk);
	void (*release)(struct mptcp_sock *msk);
} ____cacheline_aligned_in_smp;

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/74

Geliang Tang (3):
  mptcp: define struct mptcp_pm_ops
  mptcp: register default userspace pm
  mptcp: init and release mptcp_pm_ops

 include/net/mptcp.h      |  27 +++
 net/mptcp/pm.c           |   8 +
 net/mptcp/pm_userspace.c | 362 ++++++++++++++++++++++++++++-----------
 net/mptcp/protocol.c     |   1 +
 net/mptcp/protocol.h     |   9 +
 5 files changed, 309 insertions(+), 98 deletions(-)