* copy_skb_header() and sk_buff flags (question)
@ 2012-08-22 4:55 Kevin Wilson
2012-08-22 5:21 ` Eric Dumazet
0 siblings, 1 reply; 2+ messages in thread
From: Kevin Wilson @ 2012-08-22 4:55 UTC (permalink / raw)
To: netdev
Hello,
I have a question if I may, as I cannot understand this point:
I try to understand why in __copy_skb_header() we copy various flags
(like ip_summed,
local_df, pkt_type, priority, ipvs_property, and more. But there are
flags which we do
not copy, like nohdr, or fclone, or peeked.
Aren't these flags part of the sk_buff header?
regards,
Kevin
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: copy_skb_header() and sk_buff flags (question)
2012-08-22 4:55 copy_skb_header() and sk_buff flags (question) Kevin Wilson
@ 2012-08-22 5:21 ` Eric Dumazet
0 siblings, 0 replies; 2+ messages in thread
From: Eric Dumazet @ 2012-08-22 5:21 UTC (permalink / raw)
To: Kevin Wilson; +Cc: netdev
On Wed, 2012-08-22 at 07:55 +0300, Kevin Wilson wrote:
> Hello,
>
> I have a question if I may, as I cannot understand this point:
>
> I try to understand why in __copy_skb_header() we copy various flags
> (like ip_summed,
> local_df, pkt_type, priority, ipvs_property, and more. But there are
> flags which we do
> not copy, like nohdr, or fclone, or peeked.
>
> Aren't these flags part of the sk_buff header?
Caller should take care of said bits.
peeked is probably always 0 at this point...
I tried to use a single memcpy() to speedup things, but found out
it was not a trivial thing...
^ permalink raw reply [flat|nested] 2+ messages in thread
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2012-08-22 4:55 copy_skb_header() and sk_buff flags (question) Kevin Wilson
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