From 40fc3423b983b864bf70b03199191260ae9b2ea6 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sat, 3 Dec 2016 11:14:50 -0800 Subject: [PATCH] tcp: tsq: add tsq_flags / tsq_enum This is a cleanup, to ease code review of following patches. Old 'enum tsq_flags' is renamed, and a new enumeration is added with the flags used in cmpxchg() operations as opposed to single bit operations. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- include/linux/tcp.h | 11 ++++++++++- net/ipv4/tcp_output.c | 16 ++++++++-------- 2 files changed, 18 insertions(+), 9 deletions(-) diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 734bab4c3bef..d8be083ab0b0 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -364,7 +364,7 @@ struct tcp_sock { u32 *saved_syn; }; -enum tsq_flags { +enum tsq_enum { TSQ_THROTTLED, TSQ_QUEUED, TCP_TSQ_DEFERRED, /* tcp_tasklet_func() found socket was owned */ @@ -375,6 +375,15 @@ enum tsq_flags { */ }; +enum tsq_flags { + TSQF_THROTTLED = (1UL << TSQ_THROTTLED), + TSQF_QUEUED = (1UL << TSQ_QUEUED), + TCPF_TSQ_DEFERRED = (1UL << TCP_TSQ_DEFERRED), + TCPF_WRITE_TIMER_DEFERRED = (1UL << TCP_WRITE_TIMER_DEFERRED), + TCPF_DELACK_TIMER_DEFERRED = (1UL << TCP_DELACK_TIMER_DEFERRED), + TCPF_MTU_REDUCED_DEFERRED = (1UL << TCP_MTU_REDUCED_DEFERRED), +}; + static inline struct tcp_sock *tcp_sk(const struct sock *sk) { return (struct tcp_sock *)sk; diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index c7adcb57654e..8f0289b0fb24 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -784,10 +784,10 @@ static void tcp_tasklet_func(unsigned long data) } } -#define TCP_DEFERRED_ALL ((1UL << TCP_TSQ_DEFERRED) | \ - (1UL << TCP_WRITE_TIMER_DEFERRED) | \ - (1UL << TCP_DELACK_TIMER_DEFERRED) | \ - (1UL << TCP_MTU_REDUCED_DEFERRED)) +#define TCP_DEFERRED_ALL (TCPF_TSQ_DEFERRED | \ + TCPF_WRITE_TIMER_DEFERRED | \ + TCPF_DELACK_TIMER_DEFERRED | \ + TCPF_MTU_REDUCED_DEFERRED) /** * tcp_release_cb - tcp release_sock() callback * @sk: socket @@ -808,7 +808,7 @@ void tcp_release_cb(struct sock *sk) nflags = flags & ~TCP_DEFERRED_ALL; } while (cmpxchg(&tp->tsq_flags, flags, nflags) != flags); - if (flags & (1UL << TCP_TSQ_DEFERRED)) + if (flags & TCPF_TSQ_DEFERRED) tcp_tsq_handler(sk); /* Here begins the tricky part : @@ -822,15 +822,15 @@ void tcp_release_cb(struct sock *sk) */ sock_release_ownership(sk); - if (flags & (1UL << TCP_WRITE_TIMER_DEFERRED)) { + if (flags & TCPF_WRITE_TIMER_DEFERRED) { tcp_write_timer_handler(sk); __sock_put(sk); } - if (flags & (1UL << TCP_DELACK_TIMER_DEFERRED)) { + if (flags & TCPF_DELACK_TIMER_DEFERRED) { tcp_delack_timer_handler(sk); __sock_put(sk); } - if (flags & (1UL << TCP_MTU_REDUCED_DEFERRED)) { + if (flags & TCPF_MTU_REDUCED_DEFERRED) { inet_csk(sk)->icsk_af_ops->mtu_reduced(sk); __sock_put(sk); } -- 2.20.1