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net: drop nopreempt requirement on sock_prot_inuse_add()

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This is distracting really, let's make this simpler,
because many callers had to take care of this
by themselves, even if on x86 this adds more
code than really needed.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2021-11-15 09:11:50 -08:00 committed by David S. Miller
parent 4199bae10c
commit b3cb764aa1
10 changed files with 10 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/net/sock.h
View File

@ -1434,11 +1434,11 @@ struct prot_inuse {
int all;
int val[PROTO_INUSE_NR];
};
/* Called with local bh disabled */
static inline void sock_prot_inuse_add(const struct net *net,
const struct proto *prot, int val)
{
__this_cpu_add(net->core.prot_inuse->val[prot->inuse_idx], val);
this_cpu_add(net->core.prot_inuse->val[prot->inuse_idx], val);
}
static inline void sock_inuse_add(const struct net *net, int val)

4
net/ieee802154/socket.c
View File

@ -174,8 +174,8 @@ static int raw_hash(struct sock *sk)
{
write_lock_bh(&raw_lock);
sk_add_node(sk, &raw_head);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
write_unlock_bh(&raw_lock);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
return 0;
}
@ -453,8 +453,8 @@ static int dgram_hash(struct sock *sk)
{
write_lock_bh(&dgram_lock);
sk_add_node(sk, &dgram_head);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
write_unlock_bh(&dgram_lock);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
return 0;
}

2
net/ipv4/raw.c
View File

@ -99,8 +99,8 @@ int raw_hash_sk(struct sock *sk)
write_lock_bh(&h->lock);
sk_add_node(sk, head);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
write_unlock_bh(&h->lock);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
return 0;
}

8
net/ipv6/ipv6_sockglue.c
View File

@ -471,10 +471,10 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
if (sk->sk_protocol == IPPROTO_TCP) {
struct inet_connection_sock *icsk = inet_csk(sk);
local_bh_disable();
sock_prot_inuse_add(net, sk->sk_prot, -1);
sock_prot_inuse_add(net, &tcp_prot, 1);
local_bh_enable();
sk->sk_prot = &tcp_prot;
icsk->icsk_af_ops = &ipv4_specific;
sk->sk_socket->ops = &inet_stream_ops;
@ -485,10 +485,10 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
if (sk->sk_protocol == IPPROTO_UDPLITE)
prot = &udplite_prot;
local_bh_disable();
sock_prot_inuse_add(net, sk->sk_prot, -1);
sock_prot_inuse_add(net, prot, 1);
local_bh_enable();
sk->sk_prot = prot;
sk->sk_socket->ops = &inet_dgram_ops;
sk->sk_family = PF_INET;

4
net/netlink/af_netlink.c
View File

@ -707,9 +707,7 @@ static int netlink_create(struct net *net, struct socket *sock, int protocol,
if (err < 0)
goto out_module;
local_bh_disable();
sock_prot_inuse_add(net, &netlink_proto, 1);
local_bh_enable();
nlk = nlk_sk(sock->sk);
nlk->module = module;
@ -809,9 +807,7 @@ static int netlink_release(struct socket *sock)
netlink_table_ungrab();
}
local_bh_disable();
sock_prot_inuse_add(sock_net(sk), &netlink_proto, -1);
local_bh_enable();
call_rcu(&nlk->rcu, deferred_put_nlk_sk);
return 0;
}

4
net/packet/af_packet.c
View File

@ -3102,9 +3102,7 @@ static int packet_release(struct socket *sock)
sk_del_node_init_rcu(sk);
mutex_unlock(&net->packet.sklist_lock);
preempt_disable();
sock_prot_inuse_add(net, sk->sk_prot, -1);
preempt_enable();
spin_lock(&po->bind_lock);
unregister_prot_hook(sk, false);
@ -3368,9 +3366,7 @@ static int packet_create(struct net *net, struct socket *sock, int protocol,
sk_add_node_tail_rcu(sk, &net->packet.sklist);
mutex_unlock(&net->packet.sklist_lock);
preempt_disable();
sock_prot_inuse_add(net, &packet_proto, 1);
preempt_enable();
return 0;
out2:

5
net/sctp/socket.c
View File

@ -5068,12 +5068,9 @@ static int sctp_init_sock(struct sock *sk)
SCTP_DBG_OBJCNT_INC(sock);
local_bh_disable();
sk_sockets_allocated_inc(sk);
sock_prot_inuse_add(net, sk->sk_prot, 1);
local_bh_enable();
return 0;
}
@ -5099,10 +5096,8 @@ static void sctp_destroy_sock(struct sock *sk)
list_del(&sp->auto_asconf_list);
}
sctp_endpoint_free(sp->ep);
local_bh_disable();
sk_sockets_allocated_dec(sk);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
local_bh_enable();
}
/* Triggered when there are no references on the socket anymore */

2
net/smc/af_smc.c
View File

@ -89,8 +89,8 @@ int smc_hash_sk(struct sock *sk)
write_lock_bh(&h->lock);
sk_add_node(sk, head);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
write_unlock_bh(&h->lock);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
return 0;
}

4
net/unix/af_unix.c
View File

@ -522,9 +522,7 @@ static void unix_sock_destructor(struct sock *sk)
unix_release_addr(u->addr);
atomic_long_dec(&unix_nr_socks);
local_bh_disable();
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
local_bh_enable();
#ifdef UNIX_REFCNT_DEBUG
pr_debug("UNIX %p is destroyed, %ld are still alive.\n", sk,
atomic_long_read(&unix_nr_socks));
@ -889,9 +887,7 @@ static struct sock *unix_create1(struct net *net, struct socket *sock, int kern,
memset(&u->scm_stat, 0, sizeof(struct scm_stat));
unix_insert_socket(unix_sockets_unbound(sk), sk);
local_bh_disable();
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
local_bh_enable();
return sk;

4
net/xdp/xsk.c
View File

@ -794,9 +794,7 @@ static int xsk_release(struct socket *sock)
sk_del_node_init_rcu(sk);
mutex_unlock(&net->xdp.lock);
local_bh_disable();
sock_prot_inuse_add(net, sk->sk_prot, -1);
local_bh_enable();
xsk_delete_from_maps(xs);
mutex_lock(&xs->mutex);
@ -1396,9 +1394,7 @@ static int xsk_create(struct net *net, struct socket *sock, int protocol,
sk_add_node_rcu(sk, &net->xdp.list);
mutex_unlock(&net->xdp.lock);
local_bh_disable();
sock_prot_inuse_add(net, &xsk_proto, 1);
local_bh_enable();
return 0;
}