From 8d8ad9d7c4bfe79bc91b7fc419ecfb9dcdfe6a51 Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Mon, 26 Nov 2007 20:10:50 +0800 Subject: [PATCH] [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 Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- include/linux/net.h | 7 +++++++ net/atm/common.c | 2 +- net/core/sock.c | 8 ++++---- net/core/stream.c | 2 +- net/dccp/input.c | 8 ++++---- net/dccp/output.c | 2 +- net/ipv4/tcp_input.c | 12 ++++++------ net/rxrpc/af_rxrpc.c | 2 +- net/sctp/socket.c | 3 ++- net/socket.c | 9 ++++----- net/unix/af_unix.c | 8 ++++---- 11 files changed, 35 insertions(+), 28 deletions(-) diff --git a/include/linux/net.h b/include/linux/net.h index 0235d917d5c3..f95f12c5840c 100644 --- a/include/linux/net.h +++ b/include/linux/net.h @@ -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); diff --git a/net/atm/common.c b/net/atm/common.c index eba09a04f6bf..c865517ba449 100644 --- a/net/atm/common.c +++ b/net/atm/common.c @@ -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); diff --git a/net/core/sock.c b/net/core/sock.c index eac7aa0721da..118214047ed2 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -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, diff --git a/net/core/stream.c b/net/core/stream.c index b2fb846f42a4..5586879bb9b3 100644 --- a/net/core/stream.c +++ b/net/core/stream.c @@ -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); } } diff --git a/net/dccp/input.c b/net/dccp/input.c index df0fb2c149a6..ef299fbd7c26 100644 --- a/net/dccp/input.c +++ b/net/dccp/input.c @@ -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)) { diff --git a/net/dccp/output.c b/net/dccp/output.c index f49544618f20..33ce737ef3a8 100644 --- a/net/dccp/output.c +++ b/net/dccp/output.c @@ -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); } diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 79996b16b942..97ea3eda206d 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -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) << diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c index d6389450c4bf..5e82f1c0afbb 100644 --- a/net/rxrpc/af_rxrpc.c +++ b/net/rxrpc/af_rxrpc.c @@ -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); } diff --git a/net/sctp/socket.c b/net/sctp/socket.c index ea9649ca0b2a..dc2f9221f092 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -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); } } } diff --git a/net/socket.c b/net/socket.c index aeeab388cc38..9ebca5c695d6 100644 --- a/net/socket.c +++ b/net/socket.c @@ -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; diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 0f1ecbf86d0f..393197afb190 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -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) -- 2.30.2