8 Jul
2025
8 Jul
'25
1:44 a.m.
On Tue, 8 Jul 2025 01:34:13 +0000 Song, Yoong Siang wrote:
For normal XDP my understanding is that its the driver's responsibility to move the "reserved" stuff out of place before presenting the frame to program.
Is it means that driver needs to move out the "reserved" stuff before XDP program and then move back the stuff after XDP program for certain situation, like XDP_PASS?
Why would the driver need to move it back? On XDP_PASS an skb is constructed, so the metadata should be transferred to the skb. There is no need to copy it back as a prepend.