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-rw-r--r--net/can/j1939/j1939-priv.h3
-rw-r--r--net/can/j1939/main.c2
-rw-r--r--net/can/j1939/socket.c46
3 files changed, 33 insertions, 18 deletions
diff --git a/net/can/j1939/j1939-priv.h b/net/can/j1939/j1939-priv.h
index 16af1a7f8..31a93cae5 100644
--- a/net/can/j1939/j1939-priv.h
+++ b/net/can/j1939/j1939-priv.h
@@ -86,7 +86,7 @@ struct j1939_priv {
unsigned int tp_max_packet_size;
/* lock for j1939_socks list */
- spinlock_t j1939_socks_lock;
+ rwlock_t j1939_socks_lock;
struct list_head j1939_socks;
struct kref rx_kref;
@@ -301,6 +301,7 @@ struct j1939_sock {
int ifindex;
struct j1939_addr addr;
+ spinlock_t filters_lock;
struct j1939_filter *filters;
int nfilters;
pgn_t pgn_rx_filter;
diff --git a/net/can/j1939/main.c b/net/can/j1939/main.c
index ecff1c947..a6fb89fa6 100644
--- a/net/can/j1939/main.c
+++ b/net/can/j1939/main.c
@@ -274,7 +274,7 @@ struct j1939_priv *j1939_netdev_start(struct net_device *ndev)
return ERR_PTR(-ENOMEM);
j1939_tp_init(priv);
- spin_lock_init(&priv->j1939_socks_lock);
+ rwlock_init(&priv->j1939_socks_lock);
INIT_LIST_HEAD(&priv->j1939_socks);
mutex_lock(&j1939_netdev_lock);
diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c
index b0be23559..58909b365 100644
--- a/net/can/j1939/socket.c
+++ b/net/can/j1939/socket.c
@@ -80,16 +80,16 @@ static void j1939_jsk_add(struct j1939_priv *priv, struct j1939_sock *jsk)
jsk->state |= J1939_SOCK_BOUND;
j1939_priv_get(priv);
- spin_lock_bh(&priv->j1939_socks_lock);
+ write_lock_bh(&priv->j1939_socks_lock);
list_add_tail(&jsk->list, &priv->j1939_socks);
- spin_unlock_bh(&priv->j1939_socks_lock);
+ write_unlock_bh(&priv->j1939_socks_lock);
}
static void j1939_jsk_del(struct j1939_priv *priv, struct j1939_sock *jsk)
{
- spin_lock_bh(&priv->j1939_socks_lock);
+ write_lock_bh(&priv->j1939_socks_lock);
list_del_init(&jsk->list);
- spin_unlock_bh(&priv->j1939_socks_lock);
+ write_unlock_bh(&priv->j1939_socks_lock);
j1939_priv_put(priv);
jsk->state &= ~J1939_SOCK_BOUND;
@@ -262,12 +262,17 @@ static bool j1939_sk_match_dst(struct j1939_sock *jsk,
static bool j1939_sk_match_filter(struct j1939_sock *jsk,
const struct j1939_sk_buff_cb *skcb)
{
- const struct j1939_filter *f = jsk->filters;
- int nfilter = jsk->nfilters;
+ const struct j1939_filter *f;
+ int nfilter;
+
+ spin_lock_bh(&jsk->filters_lock);
+
+ f = jsk->filters;
+ nfilter = jsk->nfilters;
if (!nfilter)
/* receive all when no filters are assigned */
- return true;
+ goto filter_match_found;
for (; nfilter; ++f, --nfilter) {
if ((skcb->addr.pgn & f->pgn_mask) != f->pgn)
@@ -276,9 +281,15 @@ static bool j1939_sk_match_filter(struct j1939_sock *jsk,
continue;
if ((skcb->addr.src_name & f->name_mask) != f->name)
continue;
- return true;
+ goto filter_match_found;
}
+
+ spin_unlock_bh(&jsk->filters_lock);
return false;
+
+filter_match_found:
+ spin_unlock_bh(&jsk->filters_lock);
+ return true;
}
static bool j1939_sk_recv_match_one(struct j1939_sock *jsk,
@@ -329,13 +340,13 @@ bool j1939_sk_recv_match(struct j1939_priv *priv, struct j1939_sk_buff_cb *skcb)
struct j1939_sock *jsk;
bool match = false;
- spin_lock_bh(&priv->j1939_socks_lock);
+ read_lock_bh(&priv->j1939_socks_lock);
list_for_each_entry(jsk, &priv->j1939_socks, list) {
match = j1939_sk_recv_match_one(jsk, skcb);
if (match)
break;
}
- spin_unlock_bh(&priv->j1939_socks_lock);
+ read_unlock_bh(&priv->j1939_socks_lock);
return match;
}
@@ -344,11 +355,11 @@ void j1939_sk_recv(struct j1939_priv *priv, struct sk_buff *skb)
{
struct j1939_sock *jsk;
- spin_lock_bh(&priv->j1939_socks_lock);
+ read_lock_bh(&priv->j1939_socks_lock);
list_for_each_entry(jsk, &priv->j1939_socks, list) {
j1939_sk_recv_one(jsk, skb);
}
- spin_unlock_bh(&priv->j1939_socks_lock);
+ read_unlock_bh(&priv->j1939_socks_lock);
}
static void j1939_sk_sock_destruct(struct sock *sk)
@@ -401,6 +412,7 @@ static int j1939_sk_init(struct sock *sk)
atomic_set(&jsk->skb_pending, 0);
spin_lock_init(&jsk->sk_session_queue_lock);
INIT_LIST_HEAD(&jsk->sk_session_queue);
+ spin_lock_init(&jsk->filters_lock);
/* j1939_sk_sock_destruct() depends on SOCK_RCU_FREE flag */
sock_set_flag(sk, SOCK_RCU_FREE);
@@ -703,9 +715,11 @@ static int j1939_sk_setsockopt(struct socket *sock, int level, int optname,
}
lock_sock(&jsk->sk);
+ spin_lock_bh(&jsk->filters_lock);
ofilters = jsk->filters;
jsk->filters = filters;
jsk->nfilters = count;
+ spin_unlock_bh(&jsk->filters_lock);
release_sock(&jsk->sk);
kfree(ofilters);
return 0;
@@ -1080,12 +1094,12 @@ void j1939_sk_errqueue(struct j1939_session *session,
}
/* spread RX notifications to all sockets subscribed to this session */
- spin_lock_bh(&priv->j1939_socks_lock);
+ read_lock_bh(&priv->j1939_socks_lock);
list_for_each_entry(jsk, &priv->j1939_socks, list) {
if (j1939_sk_recv_match_one(jsk, &session->skcb))
__j1939_sk_errqueue(session, &jsk->sk, type);
}
- spin_unlock_bh(&priv->j1939_socks_lock);
+ read_unlock_bh(&priv->j1939_socks_lock);
};
void j1939_sk_send_loop_abort(struct sock *sk, int err)
@@ -1273,7 +1287,7 @@ void j1939_sk_netdev_event_netdown(struct j1939_priv *priv)
struct j1939_sock *jsk;
int error_code = ENETDOWN;
- spin_lock_bh(&priv->j1939_socks_lock);
+ read_lock_bh(&priv->j1939_socks_lock);
list_for_each_entry(jsk, &priv->j1939_socks, list) {
jsk->sk.sk_err = error_code;
if (!sock_flag(&jsk->sk, SOCK_DEAD))
@@ -1281,7 +1295,7 @@ void j1939_sk_netdev_event_netdown(struct j1939_priv *priv)
j1939_sk_queue_drop_all(priv, jsk, error_code);
}
- spin_unlock_bh(&priv->j1939_socks_lock);
+ read_unlock_bh(&priv->j1939_socks_lock);
}
static int j1939_sk_no_ioctlcmd(struct socket *sock, unsigned int cmd,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 05:17:57 +0000