xsk: refactors around generic xmit side #6016
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We are unnecessarily setting a bunch of skb fields per each processed descriptor, which is redundant for fragmented frames. Let us set these respective members for first fragment only. Signed-off-by: Maciej Fijalkowski <[email protected]>
Devices that set IFF_TX_SKB_NO_LINEAR will not execute branch that handles metadata, as we set @first_frag only for !IFF_TX_SKB_NO_LINEAR code in xsk_build_skb(). Same functionality can be achieved with checking if xsk_get_num_desc() returns 0. To replace current usage of @first_frag with XSKCB(skb)->num_descs check, pull out the code from xsk_set_destructor_arg() that initializes sk_buff::cb and call it before skb_store_bits() in branch that creates skb against first processed frag. This so error path has the XSKCB(skb)->num_descs initialized and can free skb in case skb_store_bits() failed. Signed-off-by: Maciej Fijalkowski <[email protected]>
xsk_build_skb() has gone wild with its size and one of the things we can do about it is to pull out a branch that takes care of metadata handling and make it a separate function. Consider this as a good start of cleanup. No functional changes here. Signed-off-by: Maciej Fijalkowski <[email protected]> Acked-by: Stanislav Fomichev <[email protected]> Reviewed-by: Jason Xing <[email protected]>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=1004951 expired. Closing PR. |
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Pull request for series with
subject: xsk: refactors around generic xmit side
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1004951