io_uring/net: get rid of io_notif_complete_tw_ext

io_notif_complete_tw_ext() can be removed and combined with
io_notif_complete_tw to make it simpler without sacrificing
anything.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/025a124a5e20e2474a57e2f04f16c422eb83063c.1712534031.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: isilence

io_uring/net.c

@@ -1018,8 +1018,11 @@ int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 		if (zc->flags & ~IO_ZC_FLAGS_VALID)
 			return -EINVAL;
 		if (zc->flags & IORING_SEND_ZC_REPORT_USAGE) {
-			io_notif_set_extended(notif);
-			io_notif_to_data(notif)->zc_report = true;
+			struct io_notif_data *nd = io_notif_to_data(notif);
+
+			nd->zc_report = true;
+			nd->zc_used = false;
+			nd->zc_copied = false;
 		}
 	}
 
@@ -1128,7 +1131,6 @@ static int io_send_zc_import(struct io_kiocb *req, struct io_async_msghdr *kmsg)
 			return ret;
 		kmsg->msg.sg_from_iter = io_sg_from_iter;
 	} else {
-		io_notif_set_extended(sr->notif);
 		ret = import_ubuf(ITER_SOURCE, sr->buf, sr->len, &kmsg->msg.msg_iter);
 		if (unlikely(ret))
 			return ret;
@@ -1217,8 +1219,6 @@ int io_sendmsg_zc(struct io_kiocb *req, unsigned int issue_flags)
 	unsigned flags;
 	int ret, min_ret = 0;
 
-	io_notif_set_extended(sr->notif);
-
 	sock = sock_from_file(req->file);
 	if (unlikely(!sock))
 		return -ENOTSOCK;

io_uring/notif.c

@@ -9,12 +9,12 @@
 #include "notif.h"
 #include "rsrc.h"
 
-static void io_notif_complete_tw_ext(struct io_kiocb *notif, struct io_tw_state *ts)
+void io_notif_tw_complete(struct io_kiocb *notif, struct io_tw_state *ts)
 {
 	struct io_notif_data *nd = io_notif_to_data(notif);
 	struct io_ring_ctx *ctx = notif->ctx;
 
-	if (nd->zc_report && (nd->zc_copied || !nd->zc_used))
+	if (unlikely(nd->zc_report) && (nd->zc_copied || !nd->zc_used))
 		notif->cqe.res |= IORING_NOTIF_USAGE_ZC_COPIED;
 
 	if (nd->account_pages && ctx->user) {
@@ -37,17 +37,10 @@ static void io_tx_ubuf_callback(struct sk_buff *skb, struct ubuf_info *uarg,
 			WRITE_ONCE(nd->zc_copied, true);
 	}
 
-	if (refcount_dec_and_test(&uarg->refcnt))
+	if (refcount_dec_and_test(&uarg->refcnt)) {
+		notif->io_task_work.func = io_notif_tw_complete;
 		__io_req_task_work_add(notif, IOU_F_TWQ_LAZY_WAKE);
-}
-
-void io_notif_set_extended(struct io_kiocb *notif)
-{
-	struct io_notif_data *nd = io_notif_to_data(notif);
-
-	nd->zc_used = false;
-	nd->zc_copied = false;
-	notif->io_task_work.func = io_notif_complete_tw_ext;
+	}
 }
 
 struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx)
@@ -64,7 +57,6 @@ struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx)
 	notif->task = current;
 	io_get_task_refs(1);
 	notif->rsrc_node = NULL;
-	notif->io_task_work.func = io_req_task_complete;
 
 	nd = io_notif_to_data(notif);
 	nd->zc_report = false;

io_uring/notif.h

@@ -20,7 +20,7 @@ struct io_notif_data {
 };
 
 struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx);
-void io_notif_set_extended(struct io_kiocb *notif);
+void io_notif_tw_complete(struct io_kiocb *notif, struct io_tw_state *ts);
 
 static inline struct io_notif_data *io_notif_to_data(struct io_kiocb *notif)
 {
@@ -33,8 +33,10 @@ static inline void io_notif_flush(struct io_kiocb *notif)
 	struct io_notif_data *nd = io_notif_to_data(notif);
 
 	/* drop slot's master ref */
-	if (refcount_dec_and_test(&nd->uarg.refcnt))
+	if (refcount_dec_and_test(&nd->uarg.refcnt)) {
+		notif->io_task_work.func = io_notif_tw_complete;
 		__io_req_task_work_add(notif, IOU_F_TWQ_LAZY_WAKE);
+	}
 }
 
 static inline int io_notif_account_mem(struct io_kiocb *notif, unsigned len)