diff options
Diffstat (limited to '')
| -rw-r--r-- | include/net/sock.h | 2 | ||||
| -rw-r--r-- | net/core/sock.c | 14 |
2 files changed, 15 insertions, 1 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index e91b87f54f99..9e77353a92ae 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -438,6 +438,7 @@ struct sock { struct sk_buff *skb); void (*sk_destruct)(struct sock *sk); struct sock_reuseport __rcu *sk_reuseport_cb; + struct rcu_head sk_rcu; }; #define __sk_user_data(sk) ((*((void __rcu **)&(sk)->sk_user_data))) @@ -720,6 +721,7 @@ enum sock_flags { */ SOCK_FILTER_LOCKED, /* Filter cannot be changed anymore */ SOCK_SELECT_ERR_QUEUE, /* Wake select on error queue */ + SOCK_RCU_FREE, /* wait rcu grace period in sk_destruct() */ }; #define SK_FLAGS_TIMESTAMP ((1UL << SOCK_TIMESTAMP) | (1UL << SOCK_TIMESTAMPING_RX_SOFTWARE)) diff --git a/net/core/sock.c b/net/core/sock.c index 315f5e57fffe..7a6a063b28b3 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1419,8 +1419,12 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority, } EXPORT_SYMBOL(sk_alloc); -void sk_destruct(struct sock *sk) +/* Sockets having SOCK_RCU_FREE will call this function after one RCU + * grace period. This is the case for UDP sockets and TCP listeners. + */ +static void __sk_destruct(struct rcu_head *head) { + struct sock *sk = container_of(head, struct sock, sk_rcu); struct sk_filter *filter; if (sk->sk_destruct) @@ -1449,6 +1453,14 @@ void sk_destruct(struct sock *sk) sk_prot_free(sk->sk_prot_creator, sk); } +void sk_destruct(struct sock *sk) +{ + if (sock_flag(sk, SOCK_RCU_FREE)) + call_rcu(&sk->sk_rcu, __sk_destruct); + else + __sk_destruct(&sk->sk_rcu); +} + static void __sk_free(struct sock *sk) { if (unlikely(sock_diag_has_destroy_listeners(sk) && sk->sk_net_refcnt)) |