diff options
| author | Yunsheng Lin <linyunsheng@huawei.com> | 2021-03-10 16:28:58 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-03-10 12:45:15 -0800 |
| commit | 1ddc3229ad3c40840c24a699ada5cfeb4319b578 (patch) | |
| tree | c85e3c65ebd379d4779d4afd3544668891e3e640 /net/core/skbuff.c | |
| parent | 134639e9cc0f921c2c3ad44a5bea00219f8b0ada (diff) | |
| download | linux-1ddc3229ad3c40840c24a699ada5cfeb4319b578.tar.bz2 | |
skbuff: remove some unnecessary operation in skb_segment_list()
gro list uses skb_shinfo(skb)->frag_list to link two skb together,
and NAPI_GRO_CB(p)->last->next is used when there are more skb,
see skb_gro_receive_list(). gso expects that each segmented skb is
linked together using skb->next, so only the first skb->next need
to set to skb_shinfo(skb)-> frag_list when doing gso list segment.
It is the same reason that nskb->next does not need to be set to
list_skb before goto the error handling, because nskb->next already
pointers to list_skb.
And nskb is also the last skb at the end of loop, so remove tail
variable and use nskb instead.
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/skbuff.c')
| -rw-r--r-- | net/core/skbuff.c | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index c421c8f80925..e8320b5d651a 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3732,13 +3732,13 @@ struct sk_buff *skb_segment_list(struct sk_buff *skb, unsigned int tnl_hlen = skb_tnl_header_len(skb); unsigned int delta_truesize = 0; unsigned int delta_len = 0; - struct sk_buff *tail = NULL; struct sk_buff *nskb, *tmp; int err; skb_push(skb, -skb_network_offset(skb) + offset); skb_shinfo(skb)->frag_list = NULL; + skb->next = list_skb; do { nskb = list_skb; @@ -3756,17 +3756,8 @@ struct sk_buff *skb_segment_list(struct sk_buff *skb, } } - if (!tail) - skb->next = nskb; - else - tail->next = nskb; - - if (unlikely(err)) { - nskb->next = list_skb; + if (unlikely(err)) goto err_linearize; - } - - tail = nskb; delta_len += nskb->len; delta_truesize += nskb->truesize; @@ -3793,7 +3784,7 @@ struct sk_buff *skb_segment_list(struct sk_buff *skb, skb_gso_reset(skb); - skb->prev = tail; + skb->prev = nskb; if (skb_needs_linearize(skb, features) && __skb_linearize(skb)) |