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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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32
net/sunrpc/svcsock.c
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@@ -420,6 +420,7 @@ static void svc_sock_setbufsize(struct socket *sock, unsigned int snd,
static void svc_udp_data_ready(struct sock *sk, int count)
{
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
wait_queue_head_t *wq = sk_sleep(sk);
if (svsk) {
dprintk("svc: socket %p(inet %p), count=%d, busy=%d\n",
@@ -428,8 +429,8 @@ static void svc_udp_data_ready(struct sock *sk, int count)
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
svc_xprt_enqueue(&svsk->sk_xprt);
}
if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
wake_up_interruptible(sk_sleep(sk));
if (wq && waitqueue_active(wq))
wake_up_interruptible(wq);
}
/*
@@ -438,6 +439,7 @@ static void svc_udp_data_ready(struct sock *sk, int count)
static void svc_write_space(struct sock *sk)
{
struct svc_sock *svsk = (struct svc_sock *)(sk->sk_user_data);
wait_queue_head_t *wq = sk_sleep(sk);
if (svsk) {
dprintk("svc: socket %p(inet %p), write_space busy=%d\n",
@@ -445,10 +447,10 @@ static void svc_write_space(struct sock *sk)
svc_xprt_enqueue(&svsk->sk_xprt);
}
if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk))) {
if (wq && waitqueue_active(wq)) {
dprintk("RPC svc_write_space: someone sleeping on %p\n",
svsk);
wake_up_interruptible(sk_sleep(sk));
wake_up_interruptible(wq);
}
}
@@ -739,6 +741,7 @@ static void svc_udp_init(struct svc_sock *svsk, struct svc_serv *serv)
static void svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
{
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
wait_queue_head_t *wq;
dprintk("svc: socket %p TCP (listen) state change %d\n",
sk, sk->sk_state);
@@ -761,8 +764,9 @@ static void svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
printk("svc: socket %p: no user data\n", sk);
}
if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
wake_up_interruptible_all(sk_sleep(sk));
wq = sk_sleep(sk);
if (wq && waitqueue_active(wq))
wake_up_interruptible_all(wq);
}
/*
@@ -771,6 +775,7 @@ static void svc_tcp_listen_data_ready(struct sock *sk, int count_unused)
static void svc_tcp_state_change(struct sock *sk)
{
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
wait_queue_head_t *wq = sk_sleep(sk);
dprintk("svc: socket %p TCP (connected) state change %d (svsk %p)\n",
sk, sk->sk_state, sk->sk_user_data);
@@ -781,13 +786,14 @@ static void svc_tcp_state_change(struct sock *sk)
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
svc_xprt_enqueue(&svsk->sk_xprt);
}
if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
wake_up_interruptible_all(sk_sleep(sk));
if (wq && waitqueue_active(wq))
wake_up_interruptible_all(wq);
}
static void svc_tcp_data_ready(struct sock *sk, int count)
{
struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data;
wait_queue_head_t *wq = sk_sleep(sk);
dprintk("svc: socket %p TCP data ready (svsk %p)\n",
sk, sk->sk_user_data);
@@ -795,8 +801,8 @@ static void svc_tcp_data_ready(struct sock *sk, int count)
set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags);
svc_xprt_enqueue(&svsk->sk_xprt);
}
if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
wake_up_interruptible(sk_sleep(sk));
if (wq && waitqueue_active(wq))
wake_up_interruptible(wq);
}
/*
@@ -1531,6 +1537,7 @@ static void svc_sock_detach(struct svc_xprt *xprt)
{
struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt);
struct sock *sk = svsk->sk_sk;
wait_queue_head_t *wq;
dprintk("svc: svc_sock_detach(%p)\n", svsk);
@@ -1539,8 +1546,9 @@ static void svc_sock_detach(struct svc_xprt *xprt)
sk->sk_data_ready = svsk->sk_odata;
sk->sk_write_space = svsk->sk_owspace;
if (sk_sleep(sk) && waitqueue_active(sk_sleep(sk)))
wake_up_interruptible(sk_sleep(sk));
wq = sk_sleep(sk);
if (wq && waitqueue_active(wq))
wake_up_interruptible(wq);
}
/*