/* path manager command handlers */
int mptcp_pm_announce_addr(struct mptcp_sock *msk,
- const struct mptcp_addr_info *addr)
+ const struct mptcp_addr_info *addr,
+ bool echo, bool port)
{
+ u8 add_addr = READ_ONCE(msk->pm.addr_signal);
+
pr_debug("msk=%p, local_id=%d", msk, addr->id);
+ if (add_addr) {
+ pr_warn("addr_signal error, add_addr=%d", add_addr);
+ return -EINVAL;
+ }
+
msk->pm.local = *addr;
- WRITE_ONCE(msk->pm.addr_signal, true);
+ add_addr |= BIT(MPTCP_ADD_ADDR_SIGNAL);
+ if (echo)
+ add_addr |= BIT(MPTCP_ADD_ADDR_ECHO);
+ if (addr->family == AF_INET6)
+ add_addr |= BIT(MPTCP_ADD_ADDR_IPV6);
+ if (port)
+ add_addr |= BIT(MPTCP_ADD_ADDR_PORT);
+ WRITE_ONCE(msk->pm.addr_signal, add_addr);
return 0;
}
int mptcp_pm_remove_addr(struct mptcp_sock *msk, u8 local_id)
{
- return -ENOTSUPP;
+ u8 rm_addr = READ_ONCE(msk->pm.addr_signal);
+
+ pr_debug("msk=%p, local_id=%d", msk, local_id);
+
+ if (rm_addr) {
+ pr_warn("addr_signal error, rm_addr=%d", rm_addr);
+ return -EINVAL;
+ }
+
+ msk->pm.rm_id = local_id;
+ rm_addr |= BIT(MPTCP_RM_ADDR_SIGNAL);
+ WRITE_ONCE(msk->pm.addr_signal, rm_addr);
+ return 0;
}
-int mptcp_pm_remove_subflow(struct mptcp_sock *msk, u8 remote_id)
+int mptcp_pm_remove_subflow(struct mptcp_sock *msk, u8 local_id)
{
- return -ENOTSUPP;
+ pr_debug("msk=%p, local_id=%d", msk, local_id);
+
+ spin_lock_bh(&msk->pm.lock);
+ mptcp_pm_nl_rm_subflow_received(msk, local_id);
+ spin_unlock_bh(&msk->pm.lock);
+ return 0;
}
/* path manager event handlers */
bool mptcp_pm_allow_new_subflow(struct mptcp_sock *msk)
{
struct mptcp_pm_data *pm = &msk->pm;
- int ret;
+ int ret = 0;
pr_debug("msk=%p subflows=%d max=%d allow=%d", msk, pm->subflows,
pm->subflows_max, READ_ONCE(pm->accept_subflow));
return false;
spin_lock_bh(&pm->lock);
- ret = pm->subflows < pm->subflows_max;
- if (ret && ++pm->subflows == pm->subflows_max)
- WRITE_ONCE(pm->accept_subflow, false);
+ if (READ_ONCE(pm->accept_subflow)) {
+ ret = pm->subflows < pm->subflows_max;
+ if (ret && ++pm->subflows == pm->subflows_max)
+ WRITE_ONCE(pm->accept_subflow, false);
+ }
spin_unlock_bh(&pm->lock);
return ret;
return false;
msk->pm.status |= BIT(new_status);
- if (schedule_work(&msk->work))
- sock_hold((struct sock *)msk);
+ mptcp_schedule_work((struct sock *)msk);
return true;
}
spin_lock_bh(&pm->lock);
- if (READ_ONCE(pm->work_pending))
+ /* mptcp_pm_fully_established() can be invoked by multiple
+ * racing paths - accept() and check_fully_established()
+ * be sure to serve this event only once.
+ */
+ if (READ_ONCE(pm->work_pending) &&
+ !(msk->pm.status & BIT(MPTCP_PM_ALREADY_ESTABLISHED)))
mptcp_pm_schedule_work(msk, MPTCP_PM_ESTABLISHED);
+ msk->pm.status |= BIT(MPTCP_PM_ALREADY_ESTABLISHED);
spin_unlock_bh(&pm->lock);
}
pr_debug("msk=%p remote_id=%d accept=%d", msk, addr->id,
READ_ONCE(pm->accept_addr));
- /* avoid acquiring the lock if there is no room for fouther addresses */
- if (!READ_ONCE(pm->accept_addr))
- return;
-
spin_lock_bh(&pm->lock);
- /* be sure there is something to signal re-checking under PM lock */
- if (READ_ONCE(pm->accept_addr) &&
- mptcp_pm_schedule_work(msk, MPTCP_PM_ADD_ADDR_RECEIVED))
+ if (!READ_ONCE(pm->accept_addr)) {
+ mptcp_pm_announce_addr(msk, addr, true, addr->port);
+ mptcp_pm_add_addr_send_ack(msk);
+ } else if (mptcp_pm_schedule_work(msk, MPTCP_PM_ADD_ADDR_RECEIVED)) {
pm->remote = *addr;
+ }
+
+ spin_unlock_bh(&pm->lock);
+}
+
+void mptcp_pm_add_addr_send_ack(struct mptcp_sock *msk)
+{
+ if (!mptcp_pm_should_add_signal_ipv6(msk) &&
+ !mptcp_pm_should_add_signal_port(msk))
+ return;
+
+ mptcp_pm_schedule_work(msk, MPTCP_PM_ADD_ADDR_SEND_ACK);
+}
+
+void mptcp_pm_rm_addr_received(struct mptcp_sock *msk, u8 rm_id)
+{
+ struct mptcp_pm_data *pm = &msk->pm;
+
+ pr_debug("msk=%p remote_id=%d", msk, rm_id);
+ spin_lock_bh(&pm->lock);
+ mptcp_pm_schedule_work(msk, MPTCP_PM_RM_ADDR_RECEIVED);
+ pm->rm_id = rm_id;
spin_unlock_bh(&pm->lock);
}
/* path manager helpers */
-bool mptcp_pm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
- struct mptcp_addr_info *saddr)
+bool mptcp_pm_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
+ struct mptcp_addr_info *saddr, bool *echo, bool *port)
{
int ret = false;
spin_lock_bh(&msk->pm.lock);
/* double check after the lock is acquired */
- if (!mptcp_pm_should_signal(msk))
+ if (!mptcp_pm_should_add_signal(msk))
goto out_unlock;
- if (remaining < mptcp_add_addr_len(msk->pm.local.family))
+ *echo = mptcp_pm_should_add_signal_echo(msk);
+ *port = mptcp_pm_should_add_signal_port(msk);
+
+ if (remaining < mptcp_add_addr_len(msk->pm.local.family, *echo, *port))
goto out_unlock;
*saddr = msk->pm.local;
- WRITE_ONCE(msk->pm.addr_signal, false);
+ WRITE_ONCE(msk->pm.addr_signal, 0);
+ ret = true;
+
+out_unlock:
+ spin_unlock_bh(&msk->pm.lock);
+ return ret;
+}
+
+bool mptcp_pm_rm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
+ u8 *rm_id)
+{
+ int ret = false;
+
+ spin_lock_bh(&msk->pm.lock);
+
+ /* double check after the lock is acquired */
+ if (!mptcp_pm_should_rm_signal(msk))
+ goto out_unlock;
+
+ if (remaining < TCPOLEN_MPTCP_RM_ADDR_BASE)
+ goto out_unlock;
+
+ *rm_id = msk->pm.rm_id;
+ WRITE_ONCE(msk->pm.addr_signal, 0);
ret = true;
out_unlock:
msk->pm.add_addr_accepted = 0;
msk->pm.local_addr_used = 0;
msk->pm.subflows = 0;
+ msk->pm.rm_id = 0;
WRITE_ONCE(msk->pm.work_pending, false);
- WRITE_ONCE(msk->pm.addr_signal, false);
+ WRITE_ONCE(msk->pm.addr_signal, 0);
WRITE_ONCE(msk->pm.accept_addr, false);
WRITE_ONCE(msk->pm.accept_subflow, false);
msk->pm.status = 0;
spin_lock_init(&msk->pm.lock);
+ INIT_LIST_HEAD(&msk->pm.anno_list);
mptcp_pm_nl_data_init(msk);
}
projects / linux-2.6-microblaze.git / blobdiff