From 4f8f61eb4341be07b4a8d046f646fcf934a89949 Mon Sep 17 00:00:00 2001 From: Yang Yingliang Date: Wed, 11 Dec 2013 15:17:11 +0800 Subject: net_sched: expand control flow of macro SKIP_NONLOCAL SKIP_NONLOCAL hides the control flow. The control flow should be inlined and expanded explicitly in code so that someone who reads it can tell the control flow can be changed by the statement. Signed-off-by: Yang Yingliang Signed-off-by: David S. Miller --- net/sched/em_meta.c | 157 ++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 122 insertions(+), 35 deletions(-) (limited to 'net') diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c index e5cef9567225..382519a5d7f9 100644 --- a/net/sched/em_meta.c +++ b/net/sched/em_meta.c @@ -271,40 +271,52 @@ META_COLLECTOR(int_rtiif) * Socket Attributes **************************************************************************/ -#define SKIP_NONLOCAL(skb) \ - if (unlikely(skb->sk == NULL)) { \ - *err = -1; \ - return; \ - } +#define skip_nonlocal(skb) \ + (unlikely(skb->sk == NULL)) META_COLLECTOR(int_sk_family) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_family; } META_COLLECTOR(int_sk_state) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_state; } META_COLLECTOR(int_sk_reuse) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_reuse; } META_COLLECTOR(int_sk_bound_if) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } /* No error if bound_dev_if is 0, legal userspace check */ dst->value = skb->sk->sk_bound_dev_if; } META_COLLECTOR(var_sk_bound_if) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } if (skb->sk->sk_bound_dev_if == 0) { dst->value = (unsigned long) "any"; @@ -322,151 +334,226 @@ META_COLLECTOR(var_sk_bound_if) META_COLLECTOR(int_sk_refcnt) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = atomic_read(&skb->sk->sk_refcnt); } META_COLLECTOR(int_sk_rcvbuf) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_rcvbuf; } META_COLLECTOR(int_sk_shutdown) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_shutdown; } META_COLLECTOR(int_sk_proto) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_protocol; } META_COLLECTOR(int_sk_type) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_type; } META_COLLECTOR(int_sk_rmem_alloc) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = sk_rmem_alloc_get(skb->sk); } META_COLLECTOR(int_sk_wmem_alloc) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = sk_wmem_alloc_get(skb->sk); } META_COLLECTOR(int_sk_omem_alloc) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = atomic_read(&skb->sk->sk_omem_alloc); } META_COLLECTOR(int_sk_rcv_qlen) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_receive_queue.qlen; } META_COLLECTOR(int_sk_snd_qlen) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_write_queue.qlen; } META_COLLECTOR(int_sk_wmem_queued) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_wmem_queued; } META_COLLECTOR(int_sk_fwd_alloc) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_forward_alloc; } META_COLLECTOR(int_sk_sndbuf) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_sndbuf; } META_COLLECTOR(int_sk_alloc) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = (__force int) skb->sk->sk_allocation; } META_COLLECTOR(int_sk_hash) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_hash; } META_COLLECTOR(int_sk_lingertime) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_lingertime / HZ; } META_COLLECTOR(int_sk_err_qlen) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_error_queue.qlen; } META_COLLECTOR(int_sk_ack_bl) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_ack_backlog; } META_COLLECTOR(int_sk_max_ack_bl) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_max_ack_backlog; } META_COLLECTOR(int_sk_prio) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_priority; } META_COLLECTOR(int_sk_rcvlowat) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_rcvlowat; } META_COLLECTOR(int_sk_rcvtimeo) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_rcvtimeo / HZ; } META_COLLECTOR(int_sk_sndtimeo) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_sndtimeo / HZ; } META_COLLECTOR(int_sk_sendmsg_off) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_frag.offset; } META_COLLECTOR(int_sk_write_pend) { - SKIP_NONLOCAL(skb); + if (skip_nonlocal(skb)) { + *err = -1; + return; + } dst->value = skb->sk->sk_write_pending; } -- cgit v1.2.3