diff options
| author | Alexander Lobakin <aleksander.lobakin@intel.com> | 2024-12-18 18:44:33 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-12-19 19:51:14 -0800 |
| commit | 560d958c6c68fa62ddb4bd6f890c363598d184b0 (patch) | |
| tree | 855e778c46a564be4b2e15653a605a947f013927 /include | |
| parent | 51205f841a495c78aa59d0e41683463dac23eb27 (diff) | |
xsk: add generic XSk &xdp_buff -> skb conversion
Same as with converting &xdp_buff to skb on Rx, the code which allocates
a new skb and copies the XSk frame there is identical across the
drivers, so make it generic. This includes copying all the frags if they
are present in the original buff.
System percpu page_pools greatly improve XDP_PASS performance on XSk:
instead of page_alloc() + page_free(), the net core recycles the same
pages, so the only overhead left is memcpy()s. When the Page Pool is
not compiled in, the whole function is a return-NULL (but it always
gets selected when eBPF is enabled).
Note that the passed buff gets freed if the conversion is done w/o any
error, assuming you don't need this buffer after you convert it to an
skb.
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://patch.msgid.link/20241218174435.1445282-6-aleksander.lobakin@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/xdp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/xdp.h b/include/net/xdp.h index aa24fa78cbe6..6da0e746cf75 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -337,6 +337,7 @@ void xdp_warn(const char *msg, const char *func, const int line); #define XDP_WARN(msg) xdp_warn(msg, __func__, __LINE__) struct sk_buff *xdp_build_skb_from_buff(const struct xdp_buff *xdp); +struct sk_buff *xdp_build_skb_from_zc(struct xdp_buff *xdp); struct xdp_frame *xdp_convert_zc_to_xdp_frame(struct xdp_buff *xdp); struct sk_buff *__xdp_build_skb_from_frame(struct xdp_frame *xdpf, struct sk_buff *skb, |