We're going to split struct ubuf_info and leave there only mandatory fields. Users are free to extend it. Add struct ubuf_info_msgzc, which will be an extended version for MSG_ZEROCOPY and some other users. It duplicates of struct ubuf_info for now and will be removed in a couple of patches. Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> --- include/linux/skbuff.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index ca8afa382bf2..f8ac3678dab8 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -554,7 +554,28 @@ struct ubuf_info { } mmp; }; +struct ubuf_info_msgzc { + struct ubuf_info ubuf; + + union { + struct { + unsigned long desc; + void *ctx; + }; + struct { + u32 id; + u16 len; + u16 zerocopy:1; + u32 bytelen; + }; + }; + + struct mmpin mmp; +}; + #define skb_uarg(SKB) ((struct ubuf_info *)(skb_shinfo(SKB)->destructor_arg)) +#define uarg_to_msgzc(ubuf_ptr) container_of((ubuf_ptr), struct ubuf_info_msgzc, \ + ubuf) int mm_account_pinned_pages(struct mmpin *mmp, size_t size); void mm_unaccount_pinned_pages(struct mmpin *mmp); -- 2.37.0