Commit d26b698d authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller

net/tls: add skeleton of MIB statistics

Add a skeleton structure for adding TLS statistics.
Signed-off-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9ec1c6ac
......@@ -213,3 +213,9 @@ A patchset to OpenSSL to use ktls as the record layer is
of calling send directly after a handshake using gnutls.
Since it doesn't implement a full record layer, control
messages are not supported.
Statistics
==========
TLS implementation exposes the following per-namespace statistics
(``/proc/net/tls_stat``):
......@@ -24,6 +24,9 @@ struct netns_mib {
#ifdef CONFIG_XFRM_STATISTICS
DEFINE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics);
#endif
#if IS_ENABLED(CONFIG_TLS)
DEFINE_SNMP_STAT(struct linux_tls_mib, tls_statistics);
#endif
};
#endif
......@@ -111,6 +111,12 @@ struct linux_xfrm_mib {
unsigned long mibs[LINUX_MIB_XFRMMAX];
};
/* Linux TLS */
#define LINUX_MIB_TLSMAX __LINUX_MIB_TLSMAX
struct linux_tls_mib {
unsigned long mibs[LINUX_MIB_TLSMAX];
};
#define DEFINE_SNMP_STAT(type, name) \
__typeof__(type) __percpu *name
#define DEFINE_SNMP_STAT_ATOMIC(type, name) \
......
......@@ -43,6 +43,7 @@
#include <linux/netdevice.h>
#include <linux/rcupdate.h>
#include <net/net_namespace.h>
#include <net/tcp.h>
#include <net/strparser.h>
#include <crypto/aead.h>
......@@ -73,6 +74,15 @@
*/
#define TLS_AES_CCM_IV_B0_BYTE 2
#define __TLS_INC_STATS(net, field) \
__SNMP_INC_STATS((net)->mib.tls_statistics, field)
#define TLS_INC_STATS(net, field) \
SNMP_INC_STATS((net)->mib.tls_statistics, field)
#define __TLS_DEC_STATS(net, field) \
__SNMP_DEC_STATS((net)->mib.tls_statistics, field)
#define TLS_DEC_STATS(net, field) \
SNMP_DEC_STATS((net)->mib.tls_statistics, field)
enum {
TLS_BASE,
TLS_SW,
......@@ -605,6 +615,9 @@ static inline bool tls_offload_tx_resync_pending(struct sock *sk)
return ret;
}
int __net_init tls_proc_init(struct net *net);
void __net_exit tls_proc_fini(struct net *net);
int tls_proccess_cmsg(struct sock *sk, struct msghdr *msg,
unsigned char *record_type);
int decrypt_skb(struct sock *sk, struct sk_buff *skb,
......
......@@ -323,4 +323,11 @@ enum
__LINUX_MIB_XFRMMAX
};
/* linux TLS mib definitions */
enum
{
LINUX_MIB_TLSNUM = 0,
__LINUX_MIB_TLSMAX
};
#endif /* _LINUX_SNMP_H */
......@@ -7,7 +7,7 @@ CFLAGS_trace.o := -I$(src)
obj-$(CONFIG_TLS) += tls.o
tls-y := tls_main.o tls_sw.o trace.o
tls-y := tls_main.o tls_sw.o tls_proc.o trace.o
tls-$(CONFIG_TLS_TOE) += tls_toe.o
tls-$(CONFIG_TLS_DEVICE) += tls_device.o tls_device_fallback.o
......@@ -41,6 +41,7 @@
#include <linux/inetdevice.h>
#include <linux/inet_diag.h>
#include <net/snmp.h>
#include <net/tls.h>
#include <net/tls_toe.h>
......@@ -795,6 +796,35 @@ static size_t tls_get_info_size(const struct sock *sk)
return size;
}
static int __net_init tls_init_net(struct net *net)
{
int err;
net->mib.tls_statistics = alloc_percpu(struct linux_tls_mib);
if (!net->mib.tls_statistics)
return -ENOMEM;
err = tls_proc_init(net);
if (err)
goto err_free_stats;
return 0;
err_free_stats:
free_percpu(net->mib.tls_statistics);
return err;
}
static void __net_exit tls_exit_net(struct net *net)
{
tls_proc_fini(net);
free_percpu(net->mib.tls_statistics);
}
static struct pernet_operations tls_proc_ops = {
.init = tls_init_net,
.exit = tls_exit_net,
};
static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = {
.name = "tls",
.owner = THIS_MODULE,
......@@ -806,6 +836,12 @@ static struct tcp_ulp_ops tcp_tls_ulp_ops __read_mostly = {
static int __init tls_register(void)
{
int err;
err = register_pernet_subsys(&tls_proc_ops);
if (err)
return err;
tls_sw_proto_ops = inet_stream_ops;
tls_sw_proto_ops.splice_read = tls_sw_splice_read;
......@@ -819,6 +855,7 @@ static void __exit tls_unregister(void)
{
tcp_unregister_ulp(&tcp_tls_ulp_ops);
tls_device_cleanup();
unregister_pernet_subsys(&tls_proc_ops);
}
module_init(tls_register);
......
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2019 Netronome Systems, Inc. */
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <net/snmp.h>
#include <net/tls.h>
static const struct snmp_mib tls_mib_list[] = {
SNMP_MIB_SENTINEL
};
static int tls_statistics_seq_show(struct seq_file *seq, void *v)
{
unsigned long buf[LINUX_MIB_TLSMAX] = {};
struct net *net = seq->private;
int i;
snmp_get_cpu_field_batch(buf, tls_mib_list, net->mib.tls_statistics);
for (i = 0; tls_mib_list[i].name; i++)
seq_printf(seq, "%-32s\t%lu\n", tls_mib_list[i].name, buf[i]);
return 0;
}
int __net_init tls_proc_init(struct net *net)
{
if (!proc_create_net_single("tls_stat", 0444, net->proc_net,
tls_statistics_seq_show, NULL))
return -ENOMEM;
return 0;
}
void __net_exit tls_proc_fini(struct net *net)
{
remove_proc_entry("tls_stat", net->proc_net);
}
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