diff options
| author | Florian Westphal <fw@strlen.de> | 2023-04-14 15:01:31 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2023-04-22 01:39:41 +0200 |
| commit | 2a1d6abd7ebeafc45f2fb5fabfd53b8b3beaa170 (patch) | |
| tree | 09ab9e67cf099f36472f80f2a4b9294d4a1b6c49 /net/netfilter/nf_tables_core.c | |
| parent | 00c320f9b75560628e840bef027a27c746706759 (diff) | |
netfilter: nf_tables: remove unneeded conditional
This helper is inlined, so keep it as small as possible.
If the static key is true, there is only a very small chance
that info->trace is false:
1. tracing was enabled at this very moment, the static key was
updated to active right after nft_do_table was called.
2. tracing was disabled at this very moment.
trace->info is already false, the static key is about to
be patched to false soon.
In both cases, no event will be sent because info->trace
is false (checked in noinline slowpath). info->nf_trace is irrelevant.
The nf_trace update is redunant in this case, but this will only
happen for short duration, when static key flips.
text data bss dec hex filename
old: 2980 192 32 3204 c84 nf_tables_core.o
new: 2964 192 32 3188 c74i nf_tables_core.o
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_tables_core.c')
| -rw-r--r-- | net/netfilter/nf_tables_core.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/net/netfilter/nf_tables_core.c b/net/netfilter/nf_tables_core.c index 89c05b64c2a2..bed855638050 100644 --- a/net/netfilter/nf_tables_core.c +++ b/net/netfilter/nf_tables_core.c @@ -67,10 +67,8 @@ static inline void nft_trace_packet(const struct nft_pktinfo *pkt, static inline void nft_trace_copy_nftrace(const struct nft_pktinfo *pkt, struct nft_traceinfo *info) { - if (static_branch_unlikely(&nft_trace_enabled)) { - if (info->trace) - info->nf_trace = pkt->skb->nf_trace; - } + if (static_branch_unlikely(&nft_trace_enabled)) + info->nf_trace = pkt->skb->nf_trace; } static void nft_bitwise_fast_eval(const struct nft_expr *expr, |