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[NET]: Name magic constants in sock_wake_async() 

The sock_wake_async() performs a bit different actions
depending on "how" argument. Unfortunately this argument
ony has numerical magic values.

I propose to give names to their constants to help people
reading this function callers understand what's going on
without looking into this function all the time.

I suppose this is 2.6.25 material, but if it's not (or the
naming seems poor/bad/awful), I can rework it against the
current net-2.6 tree.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2007-11-26 20:10:50 +08:00 committed by David S. Miller
parent ce865a61c8
commit 8d8ad9d7c4
11 changed files with 35 additions and 28 deletions
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7
include/linux/net.h
View File

@ -186,6 +186,13 @@ struct net_proto_family {
struct iovec;
struct kvec;
enum {
SOCK_WAKE_IO,
SOCK_WAKE_WAITD,
SOCK_WAKE_SPACE,
SOCK_WAKE_URG,
};
extern int sock_wake_async(struct socket *sk, int how, int band);
extern int sock_register(const struct net_proto_family *fam);
extern void sock_unregister(int family);

2
net/atm/common.c
View File

@ -113,7 +113,7 @@ static void vcc_write_space(struct sock *sk)
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible(sk->sk_sleep);
sk_wake_async(sk, 2, POLL_OUT);
sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
}
read_unlock(&sk->sk_callback_lock);

8
net/core/sock.c
View File

@ -1498,7 +1498,7 @@ static void sock_def_error_report(struct sock *sk)
read_lock(&sk->sk_callback_lock);
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible(sk->sk_sleep);
sk_wake_async(sk,0,POLL_ERR);
sk_wake_async(sk, SOCK_WAKE_IO, POLL_ERR);
read_unlock(&sk->sk_callback_lock);
}
@ -1507,7 +1507,7 @@ static void sock_def_readable(struct sock *sk, int len)
read_lock(&sk->sk_callback_lock);
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible(sk->sk_sleep);
sk_wake_async(sk,1,POLL_IN);
sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
read_unlock(&sk->sk_callback_lock);
}
@ -1524,7 +1524,7 @@ static void sock_def_write_space(struct sock *sk)
/* Should agree with poll, otherwise some programs break */
if (sock_writeable(sk))
sk_wake_async(sk, 2, POLL_OUT);
sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
}
read_unlock(&sk->sk_callback_lock);
@ -1539,7 +1539,7 @@ void sk_send_sigurg(struct sock *sk)
{
if (sk->sk_socket && sk->sk_socket->file)
if (send_sigurg(&sk->sk_socket->file->f_owner))
sk_wake_async(sk, 3, POLL_PRI);
sk_wake_async(sk, SOCK_WAKE_URG, POLL_PRI);
}
void sk_reset_timer(struct sock *sk, struct timer_list* timer,

2
net/core/stream.c
View File

@ -35,7 +35,7 @@ void sk_stream_write_space(struct sock *sk)
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible(sk->sk_sleep);
if (sock->fasync_list && !(sk->sk_shutdown & SEND_SHUTDOWN))
sock_wake_async(sock, 2, POLL_OUT);
sock_wake_async(sock, SOCK_WAKE_SPACE, POLL_OUT);
}
}

8
net/dccp/input.c
View File

@ -37,7 +37,7 @@ static void dccp_rcv_close(struct sock *sk, struct sk_buff *skb)
dccp_send_reset(sk, DCCP_RESET_CODE_CLOSED);
dccp_fin(sk, skb);
dccp_set_state(sk, DCCP_CLOSED);
sk_wake_async(sk, 1, POLL_HUP);
sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_HUP);
}
static void dccp_rcv_closereq(struct sock *sk, struct sk_buff *skb)
@ -90,7 +90,7 @@ static void dccp_rcv_reset(struct sock *sk, struct sk_buff *skb)
dccp_fin(sk, skb);
if (err && !sock_flag(sk, SOCK_DEAD))
sk_wake_async(sk, 0, POLL_ERR);
sk_wake_async(sk, SOCK_WAKE_IO, POLL_ERR);
dccp_time_wait(sk, DCCP_TIME_WAIT, 0);
}
@ -416,7 +416,7 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
if (!sock_flag(sk, SOCK_DEAD)) {
sk->sk_state_change(sk);
sk_wake_async(sk, 0, POLL_OUT);
sk_wake_async(sk, SOCK_WAKE_IO, POLL_OUT);
}
if (sk->sk_write_pending || icsk->icsk_ack.pingpong ||
@ -624,7 +624,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
switch (old_state) {
case DCCP_PARTOPEN:
sk->sk_state_change(sk);
sk_wake_async(sk, 0, POLL_OUT);
sk_wake_async(sk, SOCK_WAKE_IO, POLL_OUT);
break;
}
} else if (unlikely(dh->dccph_type == DCCP_PKT_SYNC)) {

2
net/dccp/output.c
View File

@ -170,7 +170,7 @@ void dccp_write_space(struct sock *sk)
wake_up_interruptible(sk->sk_sleep);
/* Should agree with poll, otherwise some programs break */
if (sock_writeable(sk))
sk_wake_async(sk, 2, POLL_OUT);
sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
read_unlock(&sk->sk_callback_lock);
}

12
net/ipv4/tcp_input.c
View File

@ -3595,9 +3595,9 @@ static void tcp_fin(struct sk_buff *skb, struct sock *sk, struct tcphdr *th)
/* Do not send POLL_HUP for half duplex close. */
if (sk->sk_shutdown == SHUTDOWN_MASK ||
sk->sk_state == TCP_CLOSE)
sk_wake_async(sk, 1, POLL_HUP);
sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_HUP);
else
sk_wake_async(sk, 1, POLL_IN);
sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
}
}
@ -4956,7 +4956,7 @@ static int tcp_rcv_synsent_state_process(struct sock *sk, struct sk_buff *skb,
if (!sock_flag(sk, SOCK_DEAD)) {
sk->sk_state_change(sk);
sk_wake_async(sk, 0, POLL_OUT);
sk_wake_async(sk, SOCK_WAKE_IO, POLL_OUT);
}
if (sk->sk_write_pending ||
@ -5186,9 +5186,9 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
* are not waked up, because sk->sk_sleep ==
* NULL and sk->sk_socket == NULL.
*/
if (sk->sk_socket) {
sk_wake_async(sk,0,POLL_OUT);
}
if (sk->sk_socket)
sk_wake_async(sk,
SOCK_WAKE_IO, POLL_OUT);
tp->snd_una = TCP_SKB_CB(skb)->ack_seq;
tp->snd_wnd = ntohs(th->window) <<

2
net/rxrpc/af_rxrpc.c
View File

@ -65,7 +65,7 @@ static void rxrpc_write_space(struct sock *sk)
if (rxrpc_writable(sk)) {
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible(sk->sk_sleep);
sk_wake_async(sk, 2, POLL_OUT);
sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
}
read_unlock(&sk->sk_callback_lock);
}

3
net/sctp/socket.c
View File

@ -6008,7 +6008,8 @@ static void __sctp_write_space(struct sctp_association *asoc)
*/
if (sock->fasync_list &&
!(sk->sk_shutdown & SEND_SHUTDOWN))
sock_wake_async(sock, 2, POLL_OUT);
sock_wake_async(sock,
SOCK_WAKE_SPACE, POLL_OUT);
}
}
}

9
net/socket.c
View File

@ -1070,20 +1070,19 @@ int sock_wake_async(struct socket *sock, int how, int band)
if (!sock || !sock->fasync_list)
return -1;
switch (how) {
case 1:
case SOCK_WAKE_WAITD:
if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags))
break;
goto call_kill;
case 2:
case SOCK_WAKE_SPACE:
if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags))
break;
/* fall through */
case 0:
case SOCK_WAKE_IO:
call_kill:
__kill_fasync(sock->fasync_list, SIGIO, band);
break;
case 3:
case SOCK_WAKE_URG:
__kill_fasync(sock->fasync_list, SIGURG, band);
}
return 0;

8
net/unix/af_unix.c
View File

@ -317,7 +317,7 @@ static void unix_write_space(struct sock *sk)
if (unix_writable(sk)) {
if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
wake_up_interruptible_sync(sk->sk_sleep);
sk_wake_async(sk, 2, POLL_OUT);
sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
}
read_unlock(&sk->sk_callback_lock);
}
@ -403,7 +403,7 @@ static int unix_release_sock (struct sock *sk, int embrion)
unix_state_unlock(skpair);
skpair->sk_state_change(skpair);
read_lock(&skpair->sk_callback_lock);
sk_wake_async(skpair,1,POLL_HUP);
sk_wake_async(skpair, SOCK_WAKE_WAITD, POLL_HUP);
read_unlock(&skpair->sk_callback_lock);
}
sock_put(skpair); /* It may now die */
@ -1900,9 +1900,9 @@ static int unix_shutdown(struct socket *sock, int mode)
other->sk_state_change(other);
read_lock(&other->sk_callback_lock);
if (peer_mode == SHUTDOWN_MASK)
sk_wake_async(other,1,POLL_HUP);
sk_wake_async(other, SOCK_WAKE_WAITD, POLL_HUP);
else if (peer_mode & RCV_SHUTDOWN)
sk_wake_async(other,1,POLL_IN);
sk_wake_async(other, SOCK_WAKE_WAITD, POLL_IN);
read_unlock(&other->sk_callback_lock);
}
if (other)