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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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)