[RFC net-next io_uring 06/11] net: add flags for controlling ubuf_info

[Pavel Begunkov <asml.silence@xxxxxxxxx>]

There are already skb_flags in ubuf_info, which enhancing skbs. Also add
flags controlling ubuf_info, mainly to hint about various referencing
aspects of it, which will be introduced in later patches.

Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
 include/linux/skbuff.h | 1 +
 io_uring/notif.c       | 1 +
 net/core/skbuff.c      | 1 +
 3 files changed, 3 insertions(+)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index e749b5d3868d..2b2e0020030b 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -535,6 +535,7 @@ struct ubuf_info {
                         bool zerocopy_success);
        refcount_t refcnt;
        u8 skb_flags;
+       u8 flags;
 };
 
 struct ubuf_info_msgzc {
diff --git a/io_uring/notif.c b/io_uring/notif.c
index 97cb4a7e8849..a2ba1e35a59f 100644
--- a/io_uring/notif.c
+++ b/io_uring/notif.c
@@ -66,6 +66,7 @@ struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx,
        nd = io_notif_to_data(notif);
        nd->account_pages = 0;
        nd->uarg.skb_flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN;
+       nd->uarg.flags = 0;
        nd->uarg.callback = io_uring_tx_zerocopy_callback;
        /* master ref owned by io_notif_slot, will be dropped on flush */
        refcount_set(&nd->uarg.refcnt, 1);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 40bb84986800..7e102373482c 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1207,6 +1207,7 @@ static struct ubuf_info *msg_zerocopy_alloc(struct sock 
*sk, size_t size)
        uarg->bytelen = size;
        uarg->zerocopy = 1;
        uarg->ubuf.skb_flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN;
+       uarg->ubuf.flags = 0;
        refcount_set(&uarg->ubuf.refcnt, 1);
        sock_hold(sk);
 
-- 
2.37.0