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Date: Thu, 27 Jun 2024 15:08:31 +0200
From: Antonio Quartulli <antonio@...nvpn.net>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
ryazanov.s.a@...il.com,
pabeni@...hat.com,
edumazet@...gle.com,
andrew@...n.ch,
sd@...asysnail.net,
Antonio Quartulli <antonio@...nvpn.net>
Subject: [PATCH net-next v5 13/25] ovpn: store tunnel and transport statistics
Byte/packet counters for in-tunnel and transport streams
are now initialized and updated as needed.
To be exported via netlink.
Signed-off-by: Antonio Quartulli <antonio@...nvpn.net>
---
drivers/net/ovpn/Makefile | 1 +
drivers/net/ovpn/io.c | 12 ++++++++++
drivers/net/ovpn/peer.c | 3 +++
drivers/net/ovpn/peer.h | 9 ++++++++
drivers/net/ovpn/skb.h | 1 +
drivers/net/ovpn/stats.c | 21 +++++++++++++++++
drivers/net/ovpn/stats.h | 47 +++++++++++++++++++++++++++++++++++++++
7 files changed, 94 insertions(+)
create mode 100644 drivers/net/ovpn/stats.c
create mode 100644 drivers/net/ovpn/stats.h
diff --git a/drivers/net/ovpn/Makefile b/drivers/net/ovpn/Makefile
index ccdaeced1982..d43fda72646b 100644
--- a/drivers/net/ovpn/Makefile
+++ b/drivers/net/ovpn/Makefile
@@ -17,4 +17,5 @@ ovpn-y += netlink-gen.o
ovpn-y += peer.o
ovpn-y += pktid.o
ovpn-y += socket.o
+ovpn-y += stats.o
ovpn-y += udp.o
diff --git a/drivers/net/ovpn/io.c b/drivers/net/ovpn/io.c
index 7da1e7e27533..0475440642dd 100644
--- a/drivers/net/ovpn/io.c
+++ b/drivers/net/ovpn/io.c
@@ -11,6 +11,7 @@
#include <linux/skbuff.h>
#include <net/gro_cells.h>
#include <net/gso.h>
+#include <net/ip.h>
#include "ovpnstruct.h"
#include "peer.h"
@@ -19,6 +20,7 @@
#include "crypto_aead.h"
#include "netlink.h"
#include "proto.h"
+#include "socket.h"
#include "udp.h"
#include "skb.h"
@@ -120,6 +122,11 @@ void ovpn_decrypt_post(struct sk_buff *skb, int ret)
goto drop;
}
+ /* increment RX stats */
+ ovpn_peer_stats_increment_rx(&peer->vpn_stats, skb->len);
+ ovpn_peer_stats_increment_rx(&peer->link_stats,
+ ovpn_skb_cb(skb)->orig_len);
+
ovpn_netdev_write(peer, skb);
/* skb is passed to upper layer - don't free it */
skb = NULL;
@@ -148,6 +155,7 @@ void ovpn_recv(struct ovpn_peer *peer, struct sk_buff *skb)
}
ovpn_skb_cb(skb)->peer = peer;
+ ovpn_skb_cb(skb)->orig_len = skb->len;
ovpn_decrypt_post(skb, ovpn_aead_decrypt(ks, skb));
}
@@ -176,6 +184,9 @@ void ovpn_encrypt_post(struct sk_buff *skb, int ret)
goto err;
skb_mark_not_on_list(skb);
+ ovpn_peer_stats_increment_tx(&peer->link_stats, skb->len);
+ ovpn_peer_stats_increment_tx(&peer->vpn_stats,
+ ovpn_skb_cb(skb)->orig_len);
switch (peer->sock->sock->sk->sk_protocol) {
case IPPROTO_UDP:
@@ -216,6 +227,7 @@ static bool ovpn_encrypt_one(struct ovpn_peer *peer, struct sk_buff *skb)
}
ovpn_skb_cb(skb)->peer = peer;
+ ovpn_skb_cb(skb)->orig_len = skb->len;
/* take a reference to the peer because the crypto code may run async.
* ovpn_encrypt_post() will release it upon completion
diff --git a/drivers/net/ovpn/peer.c b/drivers/net/ovpn/peer.c
index 2a89893b3a50..f633b70bb140 100644
--- a/drivers/net/ovpn/peer.c
+++ b/drivers/net/ovpn/peer.c
@@ -18,6 +18,7 @@
#include "main.h"
#include "netlink.h"
#include "peer.h"
+#include "socket.h"
/**
* ovpn_peer_new - allocate and initialize a new peer object
@@ -47,6 +48,8 @@ struct ovpn_peer *ovpn_peer_new(struct ovpn_struct *ovpn, u32 id)
ovpn_crypto_state_init(&peer->crypto);
spin_lock_init(&peer->lock);
kref_init(&peer->refcount);
+ ovpn_peer_stats_init(&peer->vpn_stats);
+ ovpn_peer_stats_init(&peer->link_stats);
ret = dst_cache_init(&peer->dst_cache, GFP_KERNEL);
if (ret < 0) {
diff --git a/drivers/net/ovpn/peer.h b/drivers/net/ovpn/peer.h
index 70d92cd5bd63..dd4d91dfabb5 100644
--- a/drivers/net/ovpn/peer.h
+++ b/drivers/net/ovpn/peer.h
@@ -10,10 +10,15 @@
#ifndef _NET_OVPN_OVPNPEER_H_
#define _NET_OVPN_OVPNPEER_H_
+#include <linux/ptr_ring.h>
+#include <net/dst_cache.h>
+#include <uapi/linux/ovpn.h>
+
#include "bind.h"
#include "pktid.h"
#include "crypto.h"
#include "socket.h"
+#include "stats.h"
#include <net/dst_cache.h>
#include <uapi/linux/ovpn.h>
@@ -30,6 +35,8 @@
* @dst_cache: cache for dst_entry used to send to peer
* @bind: remote peer binding
* @halt: true if ovpn_peer_mark_delete was called
+ * @vpn_stats: per-peer in-VPN TX/RX stays
+ * @link_stats: per-peer link/transport TX/RX stats
* @delete_reason: why peer was deleted (i.e. timeout, transport error, ..)
* @lock: protects binding to peer (bind)
* @refcount: reference counter
@@ -48,6 +55,8 @@ struct ovpn_peer {
struct dst_cache dst_cache;
struct ovpn_bind __rcu *bind;
bool halt;
+ struct ovpn_peer_stats vpn_stats;
+ struct ovpn_peer_stats link_stats;
enum ovpn_del_peer_reason delete_reason;
spinlock_t lock; /* protects bind */
struct kref refcount;
diff --git a/drivers/net/ovpn/skb.h b/drivers/net/ovpn/skb.h
index 44786e34b704..99e5bfe252c0 100644
--- a/drivers/net/ovpn/skb.h
+++ b/drivers/net/ovpn/skb.h
@@ -22,6 +22,7 @@ struct ovpn_cb {
struct sk_buff *skb;
struct ovpn_crypto_key_slot *ks;
struct aead_request *req;
+ size_t orig_len;
unsigned int payload_offset;
};
diff --git a/drivers/net/ovpn/stats.c b/drivers/net/ovpn/stats.c
new file mode 100644
index 000000000000..a383842c3449
--- /dev/null
+++ b/drivers/net/ovpn/stats.c
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0
+/* OpenVPN data channel offload
+ *
+ * Copyright (C) 2020-2024 OpenVPN, Inc.
+ *
+ * Author: James Yonan <james@...nvpn.net>
+ * Antonio Quartulli <antonio@...nvpn.net>
+ */
+
+#include <linux/atomic.h>
+
+#include "stats.h"
+
+void ovpn_peer_stats_init(struct ovpn_peer_stats *ps)
+{
+ atomic64_set(&ps->rx.bytes, 0);
+ atomic64_set(&ps->rx.packets, 0);
+
+ atomic64_set(&ps->tx.bytes, 0);
+ atomic64_set(&ps->tx.packets, 0);
+}
diff --git a/drivers/net/ovpn/stats.h b/drivers/net/ovpn/stats.h
new file mode 100644
index 000000000000..868f49d25eaa
--- /dev/null
+++ b/drivers/net/ovpn/stats.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* OpenVPN data channel offload
+ *
+ * Copyright (C) 2020-2024 OpenVPN, Inc.
+ *
+ * Author: James Yonan <james@...nvpn.net>
+ * Antonio Quartulli <antonio@...nvpn.net>
+ * Lev Stipakov <lev@...nvpn.net>
+ */
+
+#ifndef _NET_OVPN_OVPNSTATS_H_
+#define _NET_OVPN_OVPNSTATS_H_
+
+/* one stat */
+struct ovpn_peer_stat {
+ atomic64_t bytes;
+ atomic64_t packets;
+};
+
+/* rx and tx stats combined */
+struct ovpn_peer_stats {
+ struct ovpn_peer_stat rx;
+ struct ovpn_peer_stat tx;
+};
+
+void ovpn_peer_stats_init(struct ovpn_peer_stats *ps);
+
+static inline void ovpn_peer_stats_increment(struct ovpn_peer_stat *stat,
+ const unsigned int n)
+{
+ atomic64_add(n, &stat->bytes);
+ atomic64_inc(&stat->packets);
+}
+
+static inline void ovpn_peer_stats_increment_rx(struct ovpn_peer_stats *stats,
+ const unsigned int n)
+{
+ ovpn_peer_stats_increment(&stats->rx, n);
+}
+
+static inline void ovpn_peer_stats_increment_tx(struct ovpn_peer_stats *stats,
+ const unsigned int n)
+{
+ ovpn_peer_stats_increment(&stats->tx, n);
+}
+
+#endif /* _NET_OVPN_OVPNSTATS_H_ */
--
2.44.2
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