io_uring: warn about unhandled opcode (e781573e) · Commits · 戴 / test

Now that we have all the opcodes handled in terms of command prep and SQE reuse, add a printk_once() to warn about any potentially new and unhandled ones. Signed-off-by:

Jens Axboe <axboe@kernel.dk>

fs/io_uring.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -3079,9 +3079,11 @@ static int io_req_defer_prep(struct io_kiocb *req)
		struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
		struct io_async_ctx *io = req->io;
		struct iov_iter iter;
		ssize_t ret;
		ssize_t ret = 0;

		switch (req->opcode) {
		case IORING_OP_NOP:
		break;
		case IORING_OP_READV:
		case IORING_OP_READ_FIXED:
		/* ensure prep does right import */
		@@ -3141,7 +3143,9 @@ static int io_req_defer_prep(struct io_kiocb *req)
		ret = io_accept_prep(req);
		break;
		default:
		ret = 0;
		printk_once(KERN_WARNING "io_uring: unhandled opcode %d\n",
		req->opcode);
		ret = -EINVAL;
		break;
		}

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