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can: add protocol counter for AF_CAN sockets

Browse source 
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 <dcaratti@redhat.com>
Link: https://patch.msgid.link/9db5d0e6c11b232ad895885616f1258882a32f61.1741952160.git.dcaratti@redhat.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Davide Caratti 2025-03-14 12:39:49 +01:00 • committed by Marc Kleine-Budde
parent 958ee3d715
commit 6bffe88452
4 changed files with 8 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
net/can/af_can.c
View file

@ -172,6 +172,8 @@ static int can_create(struct net *net, struct socket *sock, int protocol,
sock_orphan(sk); sock_orphan(sk);
sock_put(sk); sock_put(sk);
sock->sk = NULL; sock->sk = NULL;
} else {
sock_prot_inuse_add(net, sk->sk_prot, 1);
} }
errout: errout:

1
net/can/bcm.c
View file

@ -1625,6 +1625,7 @@ static int bcm_release(struct socket *sock)
sock->sk = NULL; sock->sk = NULL;
release_sock(sk); release_sock(sk);
sock_prot_inuse_add(net, sk->sk_prot, -1);
sock_put(sk); sock_put(sk);
return 0; return 0;

1
net/can/isotp.c
View file

@ -1239,6 +1239,7 @@ static int isotp_release(struct socket *sock)
sock->sk = NULL; sock->sk = NULL;
release_sock(sk); release_sock(sk);
sock_prot_inuse_add(net, sk->sk_prot, -1);
sock_put(sk); sock_put(sk);
return 0; return 0;

5
net/can/raw.c
View file

@ -397,11 +397,13 @@ static int raw_release(struct socket *sock)
{ {
struct sock *sk = sock->sk; struct sock *sk = sock->sk;
struct raw_sock *ro; struct raw_sock *ro;
struct net *net;
if (!sk) if (!sk)
return 0; return 0;
ro = raw_sk(sk); ro = raw_sk(sk);
net = sock_net(sk);
spin_lock(&raw_notifier_lock); spin_lock(&raw_notifier_lock);
while (raw_busy_notifier == ro) { 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); raw_disable_allfilters(dev_net(ro->dev), ro->dev, sk);
netdev_put(ro->dev, &ro->dev_tracker); netdev_put(ro->dev, &ro->dev_tracker);
} else { } 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); release_sock(sk);
rtnl_unlock(); rtnl_unlock();
sock_prot_inuse_add(net, sk->sk_prot, -1);
sock_put(sk); sock_put(sk);
return 0; return 0;