From: Cong Wang <cong.wang@xxxxxxxxxxxxx>
The RCU callback sk_psock_destroy() only queues work psock->gc,
so we can just switch to rcu work to simplify the code.
Cc: John Fastabend <john.fastabend@xxxxxxxxx>
Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Cc: Jakub Sitnicki <jakub@xxxxxxxxxxxxxx>
Cc: Lorenz Bauer <lmb@xxxxxxxxxxxxxx>
Signed-off-by: Cong Wang <cong.wang@xxxxxxxxxxxxx>
---
include/linux/skmsg.h | 5 +----
net/core/skmsg.c | 17 +++++------------
2 files changed, 6 insertions(+), 16 deletions(-)
diff --git a/include/linux/skmsg.h b/include/linux/skmsg.h
index cf23e6e2cf54..d75c3936ab91 100644
--- a/include/linux/skmsg.h
+++ b/include/linux/skmsg.h
@@ -101,10 +101,7 @@ struct sk_psock {
struct proto *sk_proto;
struct sk_psock_work_state work_state;
struct work_struct work;
- union {
- struct rcu_head rcu;
- struct work_struct gc;
- };
+ struct rcu_work rwork;
};
int sk_msg_alloc(struct sock *sk, struct sk_msg *msg, int len,
diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index 9176add87643..a9ee26aebfbd 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -662,10 +662,10 @@ void sk_psock_stop(struct sk_psock *psock, bool wait)
static void sk_psock_done_strp(struct sk_psock *psock);
-static void sk_psock_destroy_deferred(struct work_struct *gc)
+static void sk_psock_destroy(struct work_struct *work)
{
- struct sk_psock *psock = container_of(gc, struct sk_psock, gc);
-
+ struct sk_psock *psock = container_of(to_rcu_work(work),
+ struct sk_psock, rwork);
/* No sk_callback_lock since already detached. */
sk_psock_done_strp(psock);
@@ -683,14 +683,6 @@ static void sk_psock_destroy_deferred(struct work_struct *gc)
kfree(psock);
}
-static void sk_psock_destroy(struct rcu_head *rcu)
-{
- struct sk_psock *psock = container_of(rcu, struct sk_psock, rcu);
-
- INIT_WORK(&psock->gc, sk_psock_destroy_deferred);
- schedule_work(&psock->gc);
-}
-
void sk_psock_drop(struct sock *sk, struct sk_psock *psock)
{
sk_psock_stop(psock, false);
@@ -704,7 +696,8 @@ void sk_psock_drop(struct sock *sk, struct sk_psock *psock)
sk_psock_stop_verdict(sk, psock);
write_unlock_bh(&sk->sk_callback_lock);
- call_rcu(&psock->rcu, sk_psock_destroy);
+ INIT_RCU_WORK(&psock->rwork, sk_psock_destroy);
+ queue_rcu_work(system_wq, &psock->rwork);
}
EXPORT_SYMBOL_GPL(sk_psock_drop);
--
2.25.1
