[PATCH net-next 4/4] can: add protocol counter for AF_CAN sockets
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: 2025-03-14 13:23:33
Also in:
linux-can
Subsystem:
can network layer, the rest · Maintainers:
Oliver Hartkopp, Marc Kleine-Budde, Linus Torvalds
From: Davide Caratti <redacted> The third column in the output of the following command: | # grep CAN /proc/net/protocols is systematically '0': use sock_prot_inuse_add() to account for the number of sockets for each protocol on top of AF_CAN family. Signed-off-by: Davide Caratti <redacted> Link: https://patch.msgid.link/9db5d0e6c11b232ad895885616f1258882a32f61.1741952160.git.dcaratti@redhat.com Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> --- net/can/af_can.c | 2 ++ net/can/bcm.c | 1 + net/can/isotp.c | 1 + net/can/raw.c | 5 ++++- 4 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 01f3fbb3b67d..7b191dbe3693 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c@@ -172,6 +172,8 @@ static int can_create(struct net *net, struct socket *sock, int protocol, sock_orphan(sk); sock_put(sk); sock->sk = NULL; + } else { + sock_prot_inuse_add(net, sk->sk_prot, 1); } errout:
diff --git a/net/can/bcm.c b/net/can/bcm.c
index 217049fa496e..6dc041e054ba 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c@@ -1625,6 +1625,7 @@ static int bcm_release(struct socket *sock) sock->sk = NULL; release_sock(sk); + sock_prot_inuse_add(net, sk->sk_prot, -1); sock_put(sk); return 0;
diff --git a/net/can/isotp.c b/net/can/isotp.c
index 16046931542a..789583c62f98 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c@@ -1239,6 +1239,7 @@ static int isotp_release(struct socket *sock) sock->sk = NULL; release_sock(sk); + sock_prot_inuse_add(net, sk->sk_prot, -1); sock_put(sk); return 0;
diff --git a/net/can/raw.c b/net/can/raw.c
index 9b1d5f036f57..020f21430b1d 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c@@ -397,11 +397,13 @@ static int raw_release(struct socket *sock) { struct sock *sk = sock->sk; struct raw_sock *ro; + struct net *net; if (!sk) return 0; ro = raw_sk(sk); + net = sock_net(sk); spin_lock(&raw_notifier_lock); while (raw_busy_notifier == ro) {
@@ -421,7 +423,7 @@ static int raw_release(struct socket *sock) raw_disable_allfilters(dev_net(ro->dev), ro->dev, sk); netdev_put(ro->dev, &ro->dev_tracker); } else { - raw_disable_allfilters(sock_net(sk), NULL, sk); + raw_disable_allfilters(net, NULL, sk); } }
@@ -440,6 +442,7 @@ static int raw_release(struct socket *sock) release_sock(sk); rtnl_unlock(); + sock_prot_inuse_add(net, sk->sk_prot, -1); sock_put(sk); return 0;
--
2.47.2