// SPDX-License-Identifier: GPL-2.0#include <linux/kernel.h>#include <linux/errno.h>#include <linux/file.h>#include <linux/io_uring.h>#include <linux/security.h> #include <uapi/linux/io_uring.h> #include "io_uring.h"#include "uring_cmd.h" static void io_uring_cmd_work(struct io_kiocb *req, bool *locked){	struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd); 	ioucmd->task_work_cb(ioucmd);} void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,			void (*task_work_cb)(struct io_uring_cmd *)){	struct io_kiocb *req = cmd_to_io_kiocb(ioucmd); 	ioucmd->task_work_cb = task_work_cb;	req->io_task_work.func = io_uring_cmd_work;	io_req_task_work_add(req);}EXPORT_SYMBOL_GPL(io_uring_cmd_complete_in_task); static inline void io_req_set_cqe32_extra(struct io_kiocb *req,					  u64 extra1, u64 extra2){	req->extra1 = extra1;	req->extra2 = extra2;	req->flags |= REQ_F_CQE32_INIT;} /* * Called by consumers of io_uring_cmd, if they originally returned * -EIOCBQUEUED upon receiving the command. */void io_uring_cmd_done(struct io_uring_cmd *ioucmd, ssize_t ret, ssize_t res2){	struct io_kiocb *req = cmd_to_io_kiocb(ioucmd); 	if (ret < 0)		req_set_fail(req); 	io_req_set_res(req, ret, 0);	if (req->ctx->flags & IORING_SETUP_CQE32)		io_req_set_cqe32_extra(req, res2, 0);	__io_req_complete(req, 0);}EXPORT_SYMBOL_GPL(io_uring_cmd_done); int io_uring_cmd_prep_async(struct io_kiocb *req){	struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);	size_t cmd_size; 	BUILD_BUG_ON(uring_cmd_pdu_size(0) != 16);	BUILD_BUG_ON(uring_cmd_pdu_size(1) != 80); 	cmd_size = uring_cmd_pdu_size(req->ctx->flags & IORING_SETUP_SQE128); 	memcpy(req->async_data, ioucmd->cmd, cmd_size);	return 0;} int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe){	struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd); 	if (sqe->rw_flags || sqe->__pad1)		return -EINVAL;	ioucmd->cmd = sqe->cmd;	ioucmd->cmd_op = READ_ONCE(sqe->cmd_op);	return 0;} int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags){	struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);	struct io_ring_ctx *ctx = req->ctx;	struct file *file = req->file;	int ret; 	if (!req->file->f_op->uring_cmd)		return -EOPNOTSUPP; 	ret = security_uring_cmd(ioucmd);	if (ret)		return ret; 	if (ctx->flags & IORING_SETUP_SQE128)		issue_flags |= IO_URING_F_SQE128;	if (ctx->flags & IORING_SETUP_CQE32)		issue_flags |= IO_URING_F_CQE32;	if (ctx->flags & IORING_SETUP_IOPOLL)		issue_flags |= IO_URING_F_IOPOLL; 	if (req_has_async_data(req))		ioucmd->cmd = req->async_data; 	ret = file->f_op->uring_cmd(ioucmd, issue_flags);	if (ret == -EAGAIN) {		if (!req_has_async_data(req)) {			if (io_alloc_async_data(req))				return -ENOMEM;			io_uring_cmd_prep_async(req);		}		return -EAGAIN;	} 	if (ret != -EIOCBQUEUED) {		if (ret < 0)			req_set_fail(req);		io_req_set_res(req, ret, 0);		return ret;	} 	return IOU_ISSUE_SKIP_COMPLETE;}