diff options
| author | Geliang Tang <geliangtang@gmail.com> | 2020-09-24 03:29:55 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-09-25 05:58:34 +0300 |
| commit | 0ee4261a36817c441d26ee90ad96f9cc30d678ce (patch) | |
| tree | 460c05bc5cf90cc618f7eb901f971501998eabd5 /net/mptcp | |
| parent | b6c08380860b926752d57c8fa9911fa388c4b876 (diff) | |
| download | linux-0ee4261a36817c441d26ee90ad96f9cc30d678ce.tar.xz | |
mptcp: implement mptcp_pm_remove_subflow
This patch implemented the local subflow removing function,
mptcp_pm_remove_subflow, it simply called mptcp_pm_nl_rm_subflow_received
under the PM spin lock.
We use mptcp_pm_remove_subflow to remove a local subflow, so change it's
argument from remote_id to local_id.
We check subflow->local_id in mptcp_pm_nl_rm_subflow_received to remove
a subflow.
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>
Diffstat (limited to 'net/mptcp')
| -rw-r--r-- | net/mptcp/pm.c | 9 | ||||
| -rw-r--r-- | net/mptcp/pm_netlink.c | 33 | ||||
| -rw-r--r-- | net/mptcp/protocol.h | 3 |
3 files changed, 42 insertions, 3 deletions
diff --git a/net/mptcp/pm.c b/net/mptcp/pm.c index f450bf0d49aa..7e81f53d1e5d 100644 --- a/net/mptcp/pm.c +++ b/net/mptcp/pm.c @@ -33,9 +33,14 @@ int mptcp_pm_remove_addr(struct mptcp_sock *msk, u8 local_id) 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 */ diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c index 97f9280f83fb..9064c8098521 100644 --- a/net/mptcp/pm_netlink.c +++ b/net/mptcp/pm_netlink.c @@ -350,6 +350,39 @@ void mptcp_pm_nl_rm_addr_received(struct mptcp_sock *msk) } } +void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk, u8 rm_id) +{ + struct mptcp_subflow_context *subflow, *tmp; + struct sock *sk = (struct sock *)msk; + + pr_debug("subflow rm_id %d", rm_id); + + if (!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 (rm_id != subflow->local_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.local_addr_used--; + msk->pm.subflows--; + + break; + } +} + static bool address_use_port(struct mptcp_pm_addr_entry *entry) { return (entry->addr.flags & diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h index d1b1416797f8..df6cc94df1f7 100644 --- a/net/mptcp/protocol.h +++ b/net/mptcp/protocol.h @@ -448,7 +448,7 @@ int mptcp_pm_announce_addr(struct mptcp_sock *msk, const struct mptcp_addr_info *addr, bool echo); int mptcp_pm_remove_addr(struct mptcp_sock *msk, u8 local_id); -int mptcp_pm_remove_subflow(struct mptcp_sock *msk, u8 remote_id); +int mptcp_pm_remove_subflow(struct mptcp_sock *msk, u8 local_id); static inline bool mptcp_pm_should_add_signal(struct mptcp_sock *msk) { @@ -479,6 +479,7 @@ 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); +void mptcp_pm_nl_rm_subflow_received(struct mptcp_sock *msk, u8 rm_id); 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) |