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mptcp: add a new sysctl add_addr_timeout

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This patch added a new sysctl, named add_addr_timeout, to control the
timeout value (in seconds) of the ADD_ADDR retransmission.

Suggested-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Geliang Tang 2020-11-03 11:05:07 -08:00 committed by Jakub Kicinski
parent 95ed690ebc
commit 93f323b9cc
3 changed files with 21 additions and 2 deletions
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14
net/mptcp/ctrl.c
View file

@ -18,6 +18,7 @@ struct mptcp_pernet {
struct ctl_table_header *ctl_table_hdr;
int mptcp_enabled;
unsigned int add_addr_timeout;
};
static struct mptcp_pernet *mptcp_get_pernet(struct net *net)
@ -30,6 +31,11 @@ int mptcp_is_enabled(struct net *net)
return mptcp_get_pernet(net)->mptcp_enabled;
}
unsigned int mptcp_get_add_addr_timeout(struct net *net)
{
return mptcp_get_pernet(net)->add_addr_timeout;
}
static struct ctl_table mptcp_sysctl_table[] = {
{
.procname = "enabled",
@ -40,12 +46,19 @@ static struct ctl_table mptcp_sysctl_table[] = {
*/
.proc_handler = proc_dointvec,
},
{
.procname = "add_addr_timeout",
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{}
};
static void mptcp_pernet_set_defaults(struct mptcp_pernet *pernet)
{
pernet->mptcp_enabled = 1;
pernet->add_addr_timeout = TCP_RTO_MAX;
}
static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet)
@ -61,6 +74,7 @@ static int mptcp_pernet_new_table(struct net *net, struct mptcp_pernet *pernet)
}
table[0].data = &pernet->mptcp_enabled;
table[1].data = &pernet->add_addr_timeout;
hdr = register_net_sysctl(net, MPTCP_SYSCTL_PATH, table);
if (!hdr)

8
net/mptcp/pm_netlink.c
View file

@ -206,6 +206,7 @@ static void mptcp_pm_add_timer(struct timer_list *timer)
struct mptcp_pm_add_entry *entry = from_timer(entry, timer, add_timer);
struct mptcp_sock *msk = entry->sock;
struct sock *sk = (struct sock *)msk;
struct net *net = sock_net(sk);
pr_debug("msk=%p", msk);
@ -232,7 +233,8 @@ static void mptcp_pm_add_timer(struct timer_list *timer)
}
if (entry->retrans_times < ADD_ADDR_RETRANS_MAX)
sk_reset_timer(sk, timer, jiffies + TCP_RTO_MAX);
sk_reset_timer(sk, timer,
jiffies + mptcp_get_add_addr_timeout(net));
spin_unlock_bh(&msk->pm.lock);
@ -264,6 +266,7 @@ static bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk,
{
struct mptcp_pm_add_entry *add_entry = NULL;
struct sock *sk = (struct sock *)msk;
struct net *net = sock_net(sk);
if (lookup_anno_list_by_saddr(msk, &entry->addr))
return false;
@ -279,7 +282,8 @@ static bool mptcp_pm_alloc_anno_list(struct mptcp_sock *msk,
add_entry->retrans_times = 0;
timer_setup(&add_entry->add_timer, mptcp_pm_add_timer, 0);
sk_reset_timer(sk, &add_entry->add_timer, jiffies + TCP_RTO_MAX);
sk_reset_timer(sk, &add_entry->add_timer,
jiffies + mptcp_get_add_addr_timeout(net));
return true;
}

1
net/mptcp/protocol.h
View file

@ -362,6 +362,7 @@ mptcp_subflow_get_mapped_dsn(const struct mptcp_subflow_context *subflow)
}
int mptcp_is_enabled(struct net *net);
unsigned int mptcp_get_add_addr_timeout(struct net *net);
void mptcp_subflow_fully_established(struct mptcp_subflow_context *subflow,
struct mptcp_options_received *mp_opt);
bool mptcp_subflow_data_available(struct sock *sk);