mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 02:09:42 +00:00
![Florian Westphal](/assets/img/avatar_default.png)
Exported via same /proc file as the Linux TCP MIB counters, so "netstat -s" or "nstat" will show them automatically. The MPTCP MIB counters are allocated in a distinct pcpu area in order to avoid bloating/wasting TCP pcpu memory. Counters are allocated once the first MPTCP socket is created in a network namespace and free'd on exit. If no sockets have been allocated, all-zero mptcp counters are shown. The MIB counter list is taken from the multipath-tcp.org kernel, but only a few counters have been picked up so far. The counter list can be increased at any time later on. v2 -> v3: - remove 'inline' in foo.c files (David S. Miller) Co-developed-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
69 lines
2 KiB
C
69 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#include <linux/seq_file.h>
|
|
#include <net/ip.h>
|
|
#include <net/mptcp.h>
|
|
#include <net/snmp.h>
|
|
#include <net/net_namespace.h>
|
|
|
|
#include "mib.h"
|
|
|
|
static const struct snmp_mib mptcp_snmp_list[] = {
|
|
SNMP_MIB_ITEM("MPCapableSYNRX", MPTCP_MIB_MPCAPABLEPASSIVE),
|
|
SNMP_MIB_ITEM("MPCapableACKRX", MPTCP_MIB_MPCAPABLEPASSIVEACK),
|
|
SNMP_MIB_ITEM("MPCapableFallbackACK", MPTCP_MIB_MPCAPABLEPASSIVEFALLBACK),
|
|
SNMP_MIB_ITEM("MPCapableFallbackSYNACK", MPTCP_MIB_MPCAPABLEACTIVEFALLBACK),
|
|
SNMP_MIB_ITEM("MPTCPRetrans", MPTCP_MIB_RETRANSSEGS),
|
|
SNMP_MIB_ITEM("MPJoinNoTokenFound", MPTCP_MIB_JOINNOTOKEN),
|
|
SNMP_MIB_ITEM("MPJoinSynRx", MPTCP_MIB_JOINSYNRX),
|
|
SNMP_MIB_ITEM("MPJoinSynAckRx", MPTCP_MIB_JOINSYNACKRX),
|
|
SNMP_MIB_ITEM("MPJoinSynAckHMacFailure", MPTCP_MIB_JOINSYNACKMAC),
|
|
SNMP_MIB_ITEM("MPJoinAckRx", MPTCP_MIB_JOINACKRX),
|
|
SNMP_MIB_ITEM("MPJoinAckHMacFailure", MPTCP_MIB_JOINACKMAC),
|
|
SNMP_MIB_ITEM("DSSNotMatching", MPTCP_MIB_DSSNOMATCH),
|
|
SNMP_MIB_ITEM("InfiniteMapRx", MPTCP_MIB_INFINITEMAPRX),
|
|
SNMP_MIB_SENTINEL
|
|
};
|
|
|
|
/* mptcp_mib_alloc - allocate percpu mib counters
|
|
*
|
|
* These are allocated when the first mptcp socket is created so
|
|
* we do not waste percpu memory if mptcp isn't in use.
|
|
*/
|
|
bool mptcp_mib_alloc(struct net *net)
|
|
{
|
|
struct mptcp_mib __percpu *mib = alloc_percpu(struct mptcp_mib);
|
|
|
|
if (!mib)
|
|
return false;
|
|
|
|
if (cmpxchg(&net->mib.mptcp_statistics, NULL, mib))
|
|
free_percpu(mib);
|
|
|
|
return true;
|
|
}
|
|
|
|
void mptcp_seq_show(struct seq_file *seq)
|
|
{
|
|
struct net *net = seq->private;
|
|
int i;
|
|
|
|
seq_puts(seq, "MPTcpExt:");
|
|
for (i = 0; mptcp_snmp_list[i].name; i++)
|
|
seq_printf(seq, " %s", mptcp_snmp_list[i].name);
|
|
|
|
seq_puts(seq, "\nMPTcpExt:");
|
|
|
|
if (!net->mib.mptcp_statistics) {
|
|
for (i = 0; mptcp_snmp_list[i].name; i++)
|
|
seq_puts(seq, " 0");
|
|
|
|
return;
|
|
}
|
|
|
|
for (i = 0; mptcp_snmp_list[i].name; i++)
|
|
seq_printf(seq, " %lu",
|
|
snmp_fold_field(net->mib.mptcp_statistics,
|
|
mptcp_snmp_list[i].entry));
|
|
seq_putc(seq, '\n');
|
|
}
|