forked from luck/tmp_suning_uos_patched
mptcp: Implement path manager interface commands
Fill in more path manager functionality by adding a worker function and modifying the related stub functions to schedule the worker. Co-developed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Florian Westphal <fw@strlen.de> Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Peter Krystad <peter.krystad@linux.intel.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Peter Krystad
David S. Miller
parent
ec3edaa7ca
commit
926bdeab55
132
net/mptcp/pm.c
132
net/mptcp/pm.c
|
|
@ -15,7 +15,11 @@ static struct workqueue_struct *pm_wq;
|
|||
int mptcp_pm_announce_addr(struct mptcp_sock *msk,
|
||||
const struct mptcp_addr_info *addr)
|
||||
{
|
||||
return -ENOTSUPP;
|
||||
pr_debug("msk=%p, local_id=%d", msk, addr->id);
|
||||
|
||||
msk->pm.local = *addr;
|
||||
WRITE_ONCE(msk->pm.addr_signal, true);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int mptcp_pm_remove_addr(struct mptcp_sock *msk, u8 local_id)
|
||||
|
|
@ -41,13 +45,58 @@ void mptcp_pm_new_connection(struct mptcp_sock *msk, int server_side)
|
|||
|
||||
bool mptcp_pm_allow_new_subflow(struct mptcp_sock *msk)
|
||||
{
|
||||
pr_debug("msk=%p", msk);
|
||||
return false;
|
||||
struct mptcp_pm_data *pm = &msk->pm;
|
||||
int ret;
|
||||
|
||||
pr_debug("msk=%p subflows=%d max=%d allow=%d", msk, pm->subflows,
|
||||
pm->subflows_max, READ_ONCE(pm->accept_subflow));
|
||||
|
||||
/* try to avoid acquiring the lock below */
|
||||
if (!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);
|
||||
spin_unlock_bh(&pm->lock);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* return true if the new status bit is currently cleared, that is, this event
|
||||
* can be server, eventually by an already scheduled work
|
||||
*/
|
||||
static bool mptcp_pm_schedule_work(struct mptcp_sock *msk,
|
||||
enum mptcp_pm_status new_status)
|
||||
{
|
||||
pr_debug("msk=%p status=%x new=%lx", msk, msk->pm.status,
|
||||
BIT(new_status));
|
||||
if (msk->pm.status & BIT(new_status))
|
||||
return false;
|
||||
|
||||
msk->pm.status |= BIT(new_status);
|
||||
if (queue_work(pm_wq, &msk->pm.work))
|
||||
sock_hold((struct sock *)msk);
|
||||
return true;
|
||||
}
|
||||
|
||||
void mptcp_pm_fully_established(struct mptcp_sock *msk)
|
||||
{
|
||||
struct mptcp_pm_data *pm = &msk->pm;
|
||||
|
||||
pr_debug("msk=%p", msk);
|
||||
|
||||
/* try to avoid acquiring the lock below */
|
||||
if (!READ_ONCE(pm->work_pending))
|
||||
return;
|
||||
|
||||
spin_lock_bh(&pm->lock);
|
||||
|
||||
if (READ_ONCE(pm->work_pending))
|
||||
mptcp_pm_schedule_work(msk, MPTCP_PM_ESTABLISHED);
|
||||
|
||||
spin_unlock_bh(&pm->lock);
|
||||
}
|
||||
|
||||
void mptcp_pm_connection_closed(struct mptcp_sock *msk)
|
||||
|
|
@ -58,7 +107,19 @@ void mptcp_pm_connection_closed(struct mptcp_sock *msk)
|
|||
void mptcp_pm_subflow_established(struct mptcp_sock *msk,
|
||||
struct mptcp_subflow_context *subflow)
|
||||
{
|
||||
struct mptcp_pm_data *pm = &msk->pm;
|
||||
|
||||
pr_debug("msk=%p", msk);
|
||||
|
||||
if (!READ_ONCE(pm->work_pending))
|
||||
return;
|
||||
|
||||
spin_lock_bh(&pm->lock);
|
||||
|
||||
if (READ_ONCE(pm->work_pending))
|
||||
mptcp_pm_schedule_work(msk, MPTCP_PM_SUBFLOW_ESTABLISHED);
|
||||
|
||||
spin_unlock_bh(&pm->lock);
|
||||
}
|
||||
|
||||
void mptcp_pm_subflow_closed(struct mptcp_sock *msk, u8 id)
|
||||
|
|
@ -69,7 +130,23 @@ void mptcp_pm_subflow_closed(struct mptcp_sock *msk, u8 id)
|
|||
void mptcp_pm_add_addr_received(struct mptcp_sock *msk,
|
||||
const struct mptcp_addr_info *addr)
|
||||
{
|
||||
pr_debug("msk=%p, remote_id=%d", msk, addr->id);
|
||||
struct mptcp_pm_data *pm = &msk->pm;
|
||||
|
||||
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))
|
||||
pm->remote = *addr;
|
||||
|
||||
spin_unlock_bh(&pm->lock);
|
||||
}
|
||||
|
||||
/* path manager helpers */
|
||||
|
|
@ -77,7 +154,24 @@ void mptcp_pm_add_addr_received(struct mptcp_sock *msk,
|
|||
bool mptcp_pm_addr_signal(struct mptcp_sock *msk, unsigned int remaining,
|
||||
struct mptcp_addr_info *saddr)
|
||||
{
|
||||
return false;
|
||||
int ret = false;
|
||||
|
||||
spin_lock_bh(&msk->pm.lock);
|
||||
|
||||
/* double check after the lock is acquired */
|
||||
if (!mptcp_pm_should_signal(msk))
|
||||
goto out_unlock;
|
||||
|
||||
if (remaining < mptcp_add_addr_len(msk->pm.local.family))
|
||||
goto out_unlock;
|
||||
|
||||
*saddr = msk->pm.local;
|
||||
WRITE_ONCE(msk->pm.addr_signal, false);
|
||||
ret = true;
|
||||
|
||||
out_unlock:
|
||||
spin_unlock_bh(&msk->pm.lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
int mptcp_pm_get_local_id(struct mptcp_sock *msk, struct sock_common *skc)
|
||||
|
|
@ -87,6 +181,28 @@ int mptcp_pm_get_local_id(struct mptcp_sock *msk, struct sock_common *skc)
|
|||
|
||||
static void pm_worker(struct work_struct *work)
|
||||
{
|
||||
struct mptcp_pm_data *pm = container_of(work, struct mptcp_pm_data,
|
||||
work);
|
||||
struct mptcp_sock *msk = container_of(pm, struct mptcp_sock, pm);
|
||||
struct sock *sk = (struct sock *)msk;
|
||||
|
||||
lock_sock(sk);
|
||||
spin_lock_bh(&msk->pm.lock);
|
||||
|
||||
pr_debug("msk=%p status=%x", msk, pm->status);
|
||||
if (pm->status & BIT(MPTCP_PM_ADD_ADDR_RECEIVED)) {
|
||||
pm->status &= ~BIT(MPTCP_PM_ADD_ADDR_RECEIVED);
|
||||
}
|
||||
if (pm->status & BIT(MPTCP_PM_ESTABLISHED)) {
|
||||
pm->status &= ~BIT(MPTCP_PM_ESTABLISHED);
|
||||
}
|
||||
if (pm->status & BIT(MPTCP_PM_SUBFLOW_ESTABLISHED)) {
|
||||
pm->status &= ~BIT(MPTCP_PM_SUBFLOW_ESTABLISHED);
|
||||
}
|
||||
|
||||
spin_unlock_bh(&msk->pm.lock);
|
||||
release_sock(sk);
|
||||
sock_put(sk);
|
||||
}
|
||||
|
||||
void mptcp_pm_data_init(struct mptcp_sock *msk)
|
||||
|
|
@ -105,6 +221,12 @@ void mptcp_pm_data_init(struct mptcp_sock *msk)
|
|||
INIT_WORK(&msk->pm.work, pm_worker);
|
||||
}
|
||||
|
||||
void mptcp_pm_close(struct mptcp_sock *msk)
|
||||
{
|
||||
if (cancel_work_sync(&msk->pm.work))
|
||||
sock_put((struct sock *)msk);
|
||||
}
|
||||
|
||||
void mptcp_pm_init(void)
|
||||
{
|
||||
pm_wq = alloc_workqueue("pm_wq", WQ_UNBOUND | WQ_MEM_RECLAIM, 8);
|
||||
|
|
|
|||
|
|
@ -833,6 +833,7 @@ static void mptcp_close(struct sock *sk, long timeout)
|
|||
}
|
||||
|
||||
mptcp_cancel_work(sk);
|
||||
mptcp_pm_close(msk);
|
||||
|
||||
__skb_queue_purge(&sk->sk_receive_queue);
|
||||
|
||||
|
|
|
|||
|
|
@ -330,6 +330,7 @@ void mptcp_crypto_hmac_sha(u64 key1, u64 key2, u8 *msg, int len, void *hmac);
|
|||
|
||||
void mptcp_pm_init(void);
|
||||
void mptcp_pm_data_init(struct mptcp_sock *msk);
|
||||
void mptcp_pm_close(struct mptcp_sock *msk);
|
||||
void mptcp_pm_new_connection(struct mptcp_sock *msk, int server_side);
|
||||
void mptcp_pm_fully_established(struct mptcp_sock *msk);
|
||||
bool mptcp_pm_allow_new_subflow(struct mptcp_sock *msk);
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user