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mptcp: add a new sysctl checksum_enabled

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This patch added a new sysctl, named checksum_enabled, to control
whether DSS checksum can be enabled.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-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: David S. Miller <davem@davemloft.net>
This commit is contained in:
Geliang Tang 2021-06-17 16:46:19 -07:00 committed by David S. Miller
parent fe3ab1cbd3
commit fc3c82eebf
3 changed files with 25 additions and 1 deletions
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8
Documentation/networking/mptcp-sysctl.rst
View File

@ -24,3 +24,11 @@ add_addr_timeout - INTEGER (seconds)
sysctl.
Default: 120
checksum_enabled - BOOLEAN
Control whether DSS checksum can be enabled.
DSS checksum can be enabled if the value is nonzero. This is a
per-namespace sysctl.
Default: 0

16
net/mptcp/ctrl.c
View File

@ -23,6 +23,7 @@ struct mptcp_pernet {
u8 mptcp_enabled;
unsigned int add_addr_timeout;
u8 checksum_enabled;
};
static struct mptcp_pernet *mptcp_get_pernet(struct net *net)
@ -40,10 +41,16 @@ unsigned int mptcp_get_add_addr_timeout(struct net *net)
return mptcp_get_pernet(net)->add_addr_timeout;
}
int mptcp_is_checksum_enabled(struct net *net)
{
return mptcp_get_pernet(net)->checksum_enabled;
}
static void mptcp_pernet_set_defaults(struct mptcp_pernet *pernet)
{
pernet->mptcp_enabled = 1;
pernet->add_addr_timeout = TCP_RTO_MAX;
pernet->checksum_enabled = 0;
}
#ifdef CONFIG_SYSCTL
@ -65,6 +72,14 @@ static struct ctl_table mptcp_sysctl_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "checksum_enabled",
.maxlen = sizeof(u8),
.mode = 0644,
.proc_handler = proc_dou8vec_minmax,
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE
},
{}
};
@ -82,6 +97,7 @@ 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;
table[2].data = &pernet->checksum_enabled;
hdr = register_net_sysctl(net, MPTCP_SYSCTL_PATH, table);
if (!hdr)

2
net/mptcp/protocol.h
View File

@ -542,7 +542,7 @@ static inline void mptcp_subflow_delegated_done(struct mptcp_subflow_context *su
int mptcp_is_enabled(struct net *net);
unsigned int mptcp_get_add_addr_timeout(struct net *net);
static inline int mptcp_is_checksum_enabled(struct net *net) { return false; }
int mptcp_is_checksum_enabled(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);