io_uring: introduce struct iou_vec

I need a convenient way to pass around and work with iovec+size pair,
put them into a structure and makes use of it in rw.c

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d39fadafc9e9047b0a292e5be6db3cf2f48bb1f7.1741362889.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 9 insertions, 0 deletions

diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 28783f1dde00..bac509f85c80 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -1260,3 +1260,12 @@ int io_register_clone_buffers(struct io_ring_ctx *ctx, void __user *arg)
 	fput(file);
 	return ret;
 }
+
+void io_vec_free(struct iou_vec *iv)
+{
+	if (!iv->iovec)
+		return;
+	kfree(iv->iovec);
+	iv->iovec = NULL;
+	iv->nr = 0;
+}