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| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2020-07-17 01:16:29 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-07-20 04:28:33 +0300 |
| commit | 2f0bc54ba9a85032f2402faf0fccab513848300a (patch) | |
| tree | 4c6ff1a57b746749e299739fca0f0a1b4ec2427d /include/net/xdp.h | |
| parent | bed1ce78761925785cfccbd73aea2d889f625b68 (diff) | |
| download | linux-2f0bc54ba9a85032f2402faf0fccab513848300a.tar.xz | |
xdp: introduce xdp_get_shared_info_from_{buff, frame} utility routines
Introduce xdp_get_shared_info_from_{buff,frame} utility routines to get
skb_shared_info from xdp buffer/frame pointer.
xdp_get_shared_info_from_{buff,frame} will be used to implement xdp
multi-buffer support
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/xdp.h')
| -rw-r--r-- | include/net/xdp.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/net/xdp.h b/include/net/xdp.h index 609f819ed08b..d3005bef812f 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -85,6 +85,12 @@ struct xdp_buff { ((xdp)->data_hard_start + (xdp)->frame_sz - \ SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) +static inline struct skb_shared_info * +xdp_get_shared_info_from_buff(struct xdp_buff *xdp) +{ + return (struct skb_shared_info *)xdp_data_hard_end(xdp); +} + struct xdp_frame { void *data; u16 len; @@ -98,6 +104,15 @@ struct xdp_frame { struct net_device *dev_rx; /* used by cpumap */ }; +static inline struct skb_shared_info * +xdp_get_shared_info_from_frame(struct xdp_frame *frame) +{ + void *data_hard_start = frame->data - frame->headroom - sizeof(*frame); + + return (struct skb_shared_info *)(data_hard_start + frame->frame_sz - + SKB_DATA_ALIGN(sizeof(struct skb_shared_info))); +} + /* Clear kernel pointers in xdp_frame */ static inline void xdp_scrub_frame(struct xdp_frame *frame) { |