diff options
author | Geliang Tang <geliangtang@gmail.com> | 2020-09-24 08:29:49 +0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2020-09-24 19:58:33 -0700 |
commit | d0876b2284cf8b34dd214b2d0aa21071c345da59 (patch) | |
tree | f40a00b17b08a2c26551c1133db6ffb2e2cc0532 | |
parent | 5cb104ae55e9dbffe4552cd77ded37ec8b0518cd (diff) |
mptcp: add the incoming RM_ADDR support
This patch added the RM_ADDR option parsing logic:
We parsed the incoming options to find if the rm_addr option is received,
and called mptcp_pm_rm_addr_received to schedule PM work to a new status,
named MPTCP_PM_RM_ADDR_RECEIVED.
PM work got this status, and called mptcp_pm_nl_rm_addr_received to handle
it.
In mptcp_pm_nl_rm_addr_received, we closed the subflow matching the rm_id,
and updated PM counter.
Suggested-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | net/mptcp/options.c | 5 | ||||
-rw-r--r-- | net/mptcp/pm.c | 12 | ||||
-rw-r--r-- | net/mptcp/pm_netlink.c | 34 | ||||
-rw-r--r-- | net/mptcp/protocol.c | 12 | ||||
-rw-r--r-- | net/mptcp/protocol.h | 7 |
5 files changed, 66 insertions, 4 deletions
diff --git a/net/mptcp/options.c b/net/mptcp/options.c index bbc124876417..a52a05effac9 100644 --- a/net/mptcp/options.c +++ b/net/mptcp/options.c @@ -888,6 +888,11 @@ void mptcp_incoming_options(struct sock *sk, struct sk_buff *skb, mp_opt.add_addr = 0; } + if (mp_opt.rm_addr) { + mptcp_pm_rm_addr_received(msk, mp_opt.rm_id); + mp_opt.rm_addr = 0; + } + if (!mp_opt.dss) return; diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index 81b07ae213b9..558462d87eb3 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -149,6 +149,18 @@ void mptcp_pm_add_addr_received(struct mptcp_sock *msk, spin_unlock_bh(&pm->lock); } +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_add_addr_signal(struct mptcp_sock *msk, unsigned int remaining, diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index b4a9624d7bf2..4124bc581308 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -268,6 +268,40 @@ void mptcp_pm_nl_add_addr_received(struct mptcp_sock *msk) spin_lock_bh(&msk->pm.lock); } +void mptcp_pm_nl_rm_addr_received(struct mptcp_sock *msk) +{ + struct mptcp_subflow_context *subflow, *tmp; + struct sock *sk = (struct sock *)msk; + + pr_debug("address rm_id %d", msk->pm.rm_id); + + if (!msk->pm.rm_id) + return; + + if (list_empty(&msk->conn_list)) + return; + + list_for_each_entry_safe(subflow, tmp, &msk->conn_list, node) { + struct sock *ssk = mptcp_subflow_tcp_sock(subflow); + int how = RCV_SHUTDOWN | SEND_SHUTDOWN; + long timeout = 0; + + if (msk->pm.rm_id != subflow->remote_id) + continue; + + spin_unlock_bh(&msk->pm.lock); + mptcp_subflow_shutdown(sk, ssk, how); + __mptcp_close_ssk(sk, ssk, subflow, timeout); + spin_lock_bh(&msk->pm.lock); + + msk->pm.add_addr_accepted--; + msk->pm.subflows--; + WRITE_ONCE(msk->pm.accept_addr, true); + + break; + } +} + static bool address_use_port(struct mptcp_pm_addr_entry *entry) { return (entry->addr.flags & diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 386cd4e60250..26b9233f247c 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -1652,9 +1652,9 @@ static struct sock *mptcp_subflow_get_retrans(const struct mptcp_sock *msk) * so we need to use tcp_close() after detaching them from the mptcp * parent socket. */ -static void __mptcp_close_ssk(struct sock *sk, struct sock *ssk, - struct mptcp_subflow_context *subflow, - long timeout) +void __mptcp_close_ssk(struct sock *sk, struct sock *ssk, + struct mptcp_subflow_context *subflow, + long timeout) { struct socket *sock = READ_ONCE(ssk->sk_socket); @@ -1685,6 +1685,10 @@ static void pm_work(struct mptcp_sock *msk) pm->status &= ~BIT(MPTCP_PM_ADD_ADDR_RECEIVED); mptcp_pm_nl_add_addr_received(msk); } + if (pm->status & BIT(MPTCP_PM_RM_ADDR_RECEIVED)) { + pm->status &= ~BIT(MPTCP_PM_RM_ADDR_RECEIVED); + mptcp_pm_nl_rm_addr_received(msk); + } if (pm->status & BIT(MPTCP_PM_ESTABLISHED)) { pm->status &= ~BIT(MPTCP_PM_ESTABLISHED); mptcp_pm_nl_fully_established(msk); @@ -1846,7 +1850,7 @@ static void mptcp_cancel_work(struct sock *sk) sock_put(sk); } -static void mptcp_subflow_shutdown(struct sock *sk, struct sock *ssk, int how) +void mptcp_subflow_shutdown(struct sock *sk, struct sock *ssk, int how) { lock_sock(ssk); diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index 8929b0c7660a..837e01057544 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -152,6 +152,7 @@ struct mptcp_addr_info { enum mptcp_pm_status { MPTCP_PM_ADD_ADDR_RECEIVED, + MPTCP_PM_RM_ADDR_RECEIVED, MPTCP_PM_ESTABLISHED, MPTCP_PM_SUBFLOW_ESTABLISHED, }; @@ -362,6 +363,10 @@ void mptcp_subflow_fully_established(struct mptcp_subflow_context *subflow, struct mptcp_options_received *mp_opt); bool mptcp_subflow_data_available(struct sock *sk); void __init mptcp_subflow_init(void); +void mptcp_subflow_shutdown(struct sock *sk, struct sock *ssk, int how); +void __mptcp_close_ssk(struct sock *sk, struct sock *ssk, + struct mptcp_subflow_context *subflow, + long timeout); /* called with sk socket lock held */ int __mptcp_subflow_connect(struct sock *sk, const struct mptcp_addr_info *loc, @@ -434,6 +439,7 @@ void mptcp_pm_subflow_established(struct mptcp_sock *msk, 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); +void mptcp_pm_rm_addr_received(struct mptcp_sock *msk, u8 rm_id); int mptcp_pm_announce_addr(struct mptcp_sock *msk, const struct mptcp_addr_info *addr); @@ -468,6 +474,7 @@ void mptcp_pm_nl_data_init(struct mptcp_sock *msk); void mptcp_pm_nl_fully_established(struct mptcp_sock *msk); void mptcp_pm_nl_subflow_established(struct mptcp_sock *msk); void mptcp_pm_nl_add_addr_received(struct mptcp_sock *msk); +void mptcp_pm_nl_rm_addr_received(struct mptcp_sock *msk); int mptcp_pm_nl_get_local_id(struct mptcp_sock *msk, struct sock_common *skc); static inline struct mptcp_ext *mptcp_get_ext(struct sk_buff *skb) |