^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* Multipath TCP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2019, Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #define pr_fmt(fmt) "MPTCP: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <net/tcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <net/mptcp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "protocol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /* path manager command handlers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) int mptcp_pm_announce_addr(struct mptcp_sock *msk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) const struct mptcp_addr_info *addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) bool echo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) pr_debug("msk=%p, local_id=%d", msk, addr->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) msk->pm.local = *addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) WRITE_ONCE(msk->pm.add_addr_echo, echo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) WRITE_ONCE(msk->pm.add_addr_signal, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int mptcp_pm_remove_addr(struct mptcp_sock *msk, u8 local_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) pr_debug("msk=%p, local_id=%d", msk, local_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) msk->pm.rm_id = local_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) WRITE_ONCE(msk->pm.rm_addr_signal, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) int mptcp_pm_remove_subflow(struct mptcp_sock *msk, u8 local_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) pr_debug("msk=%p, local_id=%d", msk, local_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) spin_lock_bh(&msk->pm.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) mptcp_pm_nl_rm_subflow_received(msk, local_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) spin_unlock_bh(&msk->pm.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /* path manager event handlers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) void mptcp_pm_new_connection(struct mptcp_sock *msk, int server_side)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct mptcp_pm_data *pm = &msk->pm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) pr_debug("msk=%p, token=%u side=%d", msk, msk->token, server_side);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) WRITE_ONCE(pm->server_side, server_side);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) bool mptcp_pm_allow_new_subflow(struct mptcp_sock *msk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct mptcp_pm_data *pm = &msk->pm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) pr_debug("msk=%p subflows=%d max=%d allow=%d", msk, pm->subflows,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) pm->subflows_max, READ_ONCE(pm->accept_subflow));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /* try to avoid acquiring the lock below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!READ_ONCE(pm->accept_subflow))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) spin_lock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (READ_ONCE(pm->accept_subflow)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ret = pm->subflows < pm->subflows_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (ret && ++pm->subflows == pm->subflows_max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) WRITE_ONCE(pm->accept_subflow, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) spin_unlock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* return true if the new status bit is currently cleared, that is, this event
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * can be server, eventually by an already scheduled work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static bool mptcp_pm_schedule_work(struct mptcp_sock *msk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) enum mptcp_pm_status new_status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) pr_debug("msk=%p status=%x new=%lx", msk, msk->pm.status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) BIT(new_status));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) if (msk->pm.status & BIT(new_status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) msk->pm.status |= BIT(new_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (schedule_work(&msk->work))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) sock_hold((struct sock *)msk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) void mptcp_pm_fully_established(struct mptcp_sock *msk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct mptcp_pm_data *pm = &msk->pm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) pr_debug("msk=%p", msk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* try to avoid acquiring the lock below */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (!READ_ONCE(pm->work_pending))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) spin_lock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (READ_ONCE(pm->work_pending))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) mptcp_pm_schedule_work(msk, MPTCP_PM_ESTABLISHED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) spin_unlock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) void mptcp_pm_connection_closed(struct mptcp_sock *msk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) pr_debug("msk=%p", msk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) void mptcp_pm_subflow_established(struct mptcp_sock *msk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct mptcp_subflow_context *subflow)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct mptcp_pm_data *pm = &msk->pm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) pr_debug("msk=%p", msk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (!READ_ONCE(pm->work_pending))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) spin_lock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (READ_ONCE(pm->work_pending))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) mptcp_pm_schedule_work(msk, MPTCP_PM_SUBFLOW_ESTABLISHED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) spin_unlock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) void mptcp_pm_subflow_closed(struct mptcp_sock *msk, u8 id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) pr_debug("msk=%p", msk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) void mptcp_pm_add_addr_received(struct mptcp_sock *msk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) const struct mptcp_addr_info *addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) struct mptcp_pm_data *pm = &msk->pm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) pr_debug("msk=%p remote_id=%d accept=%d", msk, addr->id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) READ_ONCE(pm->accept_addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) spin_lock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (!READ_ONCE(pm->accept_addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) mptcp_pm_announce_addr(msk, addr, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) else if (mptcp_pm_schedule_work(msk, MPTCP_PM_ADD_ADDR_RECEIVED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) pm->remote = *addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) spin_unlock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) void mptcp_pm_rm_addr_received(struct mptcp_sock *msk, u8 rm_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct mptcp_pm_data *pm = &msk->pm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) pr_debug("msk=%p remote_id=%d", msk, rm_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) spin_lock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) mptcp_pm_schedule_work(msk, MPTCP_PM_RM_ADDR_RECEIVED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) pm->rm_id = rm_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) spin_unlock_bh(&pm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /* path manager helpers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) struct mptcp_addr_info *saddr, bool *echo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) int ret = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) spin_lock_bh(&msk->pm.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /* double check after the lock is acquired */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (!mptcp_pm_should_add_signal(msk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) *echo = READ_ONCE(msk->pm.add_addr_echo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (remaining < mptcp_add_addr_len(msk->pm.local.family, *echo))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) *saddr = msk->pm.local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) WRITE_ONCE(msk->pm.add_addr_signal, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) ret = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) spin_unlock_bh(&msk->pm.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) u8 *rm_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) int ret = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) spin_lock_bh(&msk->pm.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) /* double check after the lock is acquired */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (!mptcp_pm_should_rm_signal(msk))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (remaining < TCPOLEN_MPTCP_RM_ADDR_BASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) *rm_id = msk->pm.rm_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) WRITE_ONCE(msk->pm.rm_addr_signal, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) ret = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) spin_unlock_bh(&msk->pm.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) int mptcp_pm_get_local_id(struct mptcp_sock *msk, struct sock_common *skc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return mptcp_pm_nl_get_local_id(msk, skc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) void mptcp_pm_data_init(struct mptcp_sock *msk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) msk->pm.add_addr_signaled = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) msk->pm.add_addr_accepted = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) msk->pm.local_addr_used = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) msk->pm.subflows = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) msk->pm.rm_id = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) WRITE_ONCE(msk->pm.work_pending, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) WRITE_ONCE(msk->pm.add_addr_signal, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) WRITE_ONCE(msk->pm.rm_addr_signal, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) WRITE_ONCE(msk->pm.accept_addr, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) WRITE_ONCE(msk->pm.accept_subflow, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) WRITE_ONCE(msk->pm.add_addr_echo, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) msk->pm.status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) spin_lock_init(&msk->pm.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) INIT_LIST_HEAD(&msk->pm.anno_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) mptcp_pm_nl_data_init(msk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) void __init mptcp_pm_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) mptcp_pm_nl_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }