diff options
| author | Alexander Lobakin <alobakin@pm.me> | 2021-03-13 20:30:10 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-03-14 14:41:08 -0700 |
| commit | 9dc2c313378528afe1bddf12cad88dbfe0998820 (patch) | |
| tree | 6dd1af5981d2d20279da00850eff6602130fa693 | |
| parent | 0ccf4d50d14f360dfae5b25b8ffcb27f98e591f0 (diff) | |
gro: consistentify napi->gro_hash[x] access in dev_gro_receive()
GRO bucket index doesn't change through the entire function.
Store a pointer to the corresponding bucket instead of its member
and use it consistently through the function.
It is performance-safe since &gro_list->list == gro_list.
Misc: remove superfluous braces around single-line branches.
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/core/dev.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 1317e6b6758a..b635467087f3 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5953,7 +5953,7 @@ static void gro_flush_oldest(struct napi_struct *napi, struct list_head *head) static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff *skb) { u32 hash = skb_get_hash_raw(skb) & (GRO_HASH_BUCKETS - 1); - struct list_head *gro_head = &napi->gro_hash[hash].list; + struct gro_list *gro_list = &napi->gro_hash[hash]; struct list_head *head = &offload_base; struct packet_offload *ptype; __be16 type = skb->protocol; @@ -5965,7 +5965,7 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff if (netif_elide_gro(skb->dev)) goto normal; - gro_list_prepare(gro_head, skb); + gro_list_prepare(&gro_list->list, skb); rcu_read_lock(); list_for_each_entry_rcu(ptype, head, list) { @@ -6001,7 +6001,7 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff pp = INDIRECT_CALL_INET(ptype->callbacks.gro_receive, ipv6_gro_receive, inet_gro_receive, - gro_head, skb); + &gro_list->list, skb); break; } rcu_read_unlock(); @@ -6020,7 +6020,7 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff if (pp) { skb_list_del_init(pp); napi_gro_complete(napi, pp); - napi->gro_hash[hash].count--; + gro_list->count--; } if (same_flow) @@ -6029,16 +6029,16 @@ static enum gro_result dev_gro_receive(struct napi_struct *napi, struct sk_buff if (NAPI_GRO_CB(skb)->flush) goto normal; - if (unlikely(napi->gro_hash[hash].count >= MAX_GRO_SKBS)) { - gro_flush_oldest(napi, gro_head); - } else { - napi->gro_hash[hash].count++; - } + if (unlikely(gro_list->count >= MAX_GRO_SKBS)) + gro_flush_oldest(napi, &gro_list->list); + else + gro_list->count++; + NAPI_GRO_CB(skb)->count = 1; NAPI_GRO_CB(skb)->age = jiffies; NAPI_GRO_CB(skb)->last = skb; skb_shinfo(skb)->gso_size = skb_gro_len(skb); - list_add(&skb->list, gro_head); + list_add(&skb->list, &gro_list->list); ret = GRO_HELD; pull: @@ -6046,7 +6046,7 @@ pull: if (grow > 0) gro_pull_from_frag0(skb, grow); ok: - if (napi->gro_hash[hash].count) { + if (gro_list->count) { if (!test_bit(hash, &napi->gro_bitmask)) __set_bit(hash, &napi->gro_bitmask); } else if (test_bit(hash, &napi->gro_bitmask)) { |