io_uring: make io_alloc_ocqe() take a struct io_cqe pointer

The number of arguments to io_alloc_ocqe() is a bit unwieldy. Make it
take a struct io_cqe pointer rather than three separate CQE args. One
path already has that readily available, add an io_init_cqe() helper for
the remaining two.

Reviewed-by: Caleb Sander Mateos <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>

Author: axboe

io_uring/io_uring.c

@@ -724,8 +724,8 @@ static bool io_cqring_add_overflow(struct io_ring_ctx *ctx,
 }
 
 static struct io_overflow_cqe *io_alloc_ocqe(struct io_ring_ctx *ctx,
-					     u64 user_data, s32 res, u32 cflags,
-					     u64 extra1, u64 extra2, gfp_t gfp)
+					     struct io_cqe *cqe, u64 extra1,
+					     u64 extra2, gfp_t gfp)
 {
 	struct io_overflow_cqe *ocqe;
 	size_t ocq_size = sizeof(struct io_overflow_cqe);
@@ -735,11 +735,11 @@ static struct io_overflow_cqe *io_alloc_ocqe(struct io_ring_ctx *ctx,
 		ocq_size += sizeof(struct io_uring_cqe);
 
 	ocqe = kmalloc(ocq_size, gfp | __GFP_ACCOUNT);
-	trace_io_uring_cqe_overflow(ctx, user_data, res, cflags, ocqe);
+	trace_io_uring_cqe_overflow(ctx, cqe->user_data, cqe->res, cqe->flags, ocqe);
 	if (ocqe) {
-		ocqe->cqe.user_data = user_data;
-		ocqe->cqe.res = res;
-		ocqe->cqe.flags = cflags;
+		ocqe->cqe.user_data = cqe->user_data;
+		ocqe->cqe.res = cqe->res;
+		ocqe->cqe.flags = cqe->flags;
 		if (is_cqe32) {
 			ocqe->cqe.big_cqe[0] = extra1;
 			ocqe->cqe.big_cqe[1] = extra2;
@@ -806,6 +806,11 @@ static bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data, s32 res,
 	return false;
 }
 
+static inline struct io_cqe io_init_cqe(u64 user_data, s32 res, u32 cflags)
+{
+	return (struct io_cqe) { .user_data = user_data, .res = res, .flags = cflags };
+}
+
 bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags)
 {
 	bool filled;
@@ -814,8 +819,9 @@ bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags
 	filled = io_fill_cqe_aux(ctx, user_data, res, cflags);
 	if (unlikely(!filled)) {
 		struct io_overflow_cqe *ocqe;
+		struct io_cqe cqe = io_init_cqe(user_data, res, cflags);
 
-		ocqe = io_alloc_ocqe(ctx, user_data, res, cflags, 0, 0, GFP_ATOMIC);
+		ocqe = io_alloc_ocqe(ctx, &cqe, 0, 0, GFP_ATOMIC);
 		filled = io_cqring_add_overflow(ctx, ocqe);
 	}
 	io_cq_unlock_post(ctx);
@@ -833,8 +839,9 @@ void io_add_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags)
 
 	if (!io_fill_cqe_aux(ctx, user_data, res, cflags)) {
 		struct io_overflow_cqe *ocqe;
+		struct io_cqe cqe = io_init_cqe(user_data, res, cflags);
 
-		ocqe = io_alloc_ocqe(ctx, user_data, res, cflags, 0, 0, GFP_KERNEL);
+		ocqe = io_alloc_ocqe(ctx, &cqe, 0, 0, GFP_KERNEL);
 		spin_lock(&ctx->completion_lock);
 		io_cqring_add_overflow(ctx, ocqe);
 		spin_unlock(&ctx->completion_lock);
@@ -1444,8 +1451,7 @@ void __io_submit_flush_completions(struct io_ring_ctx *ctx)
 			gfp_t gfp = ctx->lockless_cq ? GFP_KERNEL : GFP_ATOMIC;
 			struct io_overflow_cqe *ocqe;
 
-			ocqe = io_alloc_ocqe(ctx, req->cqe.user_data, req->cqe.res,
-					     req->cqe.flags, req->big_cqe.extra1,
+			ocqe = io_alloc_ocqe(ctx, &req->cqe, req->big_cqe.extra1,
 					     req->big_cqe.extra2, gfp);
 			if (ctx->lockless_cq) {
 				spin_lock(&ctx->completion_lock);