On 16/04/15 19:39, Zoltan Kiss wrote:
Hi, If I add new data area, can I do that at the expense of the actual segment's tailroom? (by shifting data up into the tailroom to make space) In other words: does this necessarily increase odp_packet_buf_len()? And if I remove data area, do I have to decrease odp_packet_buf_len()? I hope not, it wouldn't make too much sense, and it wouldn't be always possible if you have only fixed sized buffers. Zoli
I think I found a bug in the linux-generic implementation of add_data: it doesn't keep the headroom size of the original packet. I'm looking into these things because DPDK doesn't seem to allow you to move your odp_packet_data() out of the first segment. However in case of linux-generic it's also not possible because add_data doesn't seem to carry the headroom information, and otherwise the headroom can only grow until the first segment lasts.
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