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mptcp: Add a member to mptcp_pm_data to track kernel vs userspace mode

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When adding support for netlink path management commands, the kernel
needs to know whether paths are being controlled by the in-kernel path
manager or a userspace PM.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Mat Martineau 2022-04-27 15:49:58 -07:00 committed by Jakub Kicinski
parent 9273b9d579
commit d85a8fde71
2 changed files with 13 additions and 0 deletions
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4
net/mptcp/pm.c
View file

@ -424,6 +424,10 @@ void mptcp_pm_data_reset(struct mptcp_sock *msk)
pm->subflows = 0;
pm->rm_list_tx.nr = 0;
pm->rm_list_rx.nr = 0;
WRITE_ONCE(pm->pm_type, MPTCP_PM_TYPE_KERNEL);
/* pm->work_pending must be only be set to 'true' when
* pm->pm_type is set to MPTCP_PM_TYPE_KERNEL
*/
WRITE_ONCE(pm->work_pending,
(!!mptcp_pm_get_local_addr_max(msk) && subflows_allowed) ||
!!mptcp_pm_get_add_addr_signal_max(msk));

9
net/mptcp/protocol.h
View file

@ -184,6 +184,14 @@ enum mptcp_pm_status {
*/
};
enum mptcp_pm_type {
MPTCP_PM_TYPE_KERNEL = 0,
MPTCP_PM_TYPE_USERSPACE,
__MPTCP_PM_TYPE_NR,
__MPTCP_PM_TYPE_MAX = __MPTCP_PM_TYPE_NR - 1,
};
/* Status bits below MPTCP_PM_ALREADY_ESTABLISHED need pm worker actions */
#define MPTCP_PM_WORK_MASK ((1 << MPTCP_PM_ALREADY_ESTABLISHED) - 1)
@ -212,6 +220,7 @@ struct mptcp_pm_data {
u8 add_addr_signaled;
u8 add_addr_accepted;
u8 local_addr_used;
u8 pm_type;
u8 subflows;
u8 status;
DECLARE_BITMAP(id_avail_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);