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net: add __rcu annotations to sk_wq and wq

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Add proper RCU annotations/verbs to sk_wq and wq members

Fix __sctp_write_space() sk_sleep() abuse (and sock->wq access)

Fix sunrpc sk_sleep() abuse too

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2011-02-18 03:26:36 +00:00
committed by David S. Miller
parent 04cfa852ff
commit eaefd1105b
6 changed files with 46 additions and 30 deletions
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7
include/net/sock.h
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@@ -281,7 +281,7 @@ struct sock {
int sk_rcvbuf;
struct sk_filter __rcu *sk_filter;
struct socket_wq *sk_wq;
struct socket_wq __rcu *sk_wq;
#ifdef CONFIG_NET_DMA
struct sk_buff_head sk_async_wait_queue;
@@ -1266,7 +1266,8 @@ static inline void sk_set_socket(struct sock *sk, struct socket *sock)
static inline wait_queue_head_t *sk_sleep(struct sock *sk)
{
return &sk->sk_wq->wait;
BUILD_BUG_ON(offsetof(struct socket_wq, wait) != 0);
return &rcu_dereference_raw(sk->sk_wq)->wait;
}
/* Detach socket from process context.
* Announce socket dead, detach it from wait queue and inode.
@@ -1287,7 +1288,7 @@ static inline void sock_orphan(struct sock *sk)
static inline void sock_graft(struct sock *sk, struct socket *parent)
{
write_lock_bh(&sk->sk_callback_lock);
rcu_assign_pointer(sk->sk_wq, parent->wq);
sk->sk_wq = parent->wq;
parent->sk = sk;
sk_set_socket(sk, parent);
security_sock_graft(sk, parent);