nvme/host/ioctl.c

16 static bool nvme_cmd_allowed(struct nvme_ns *ns, struct nvme_command *c,
42 	if (!ns) {
61 	effects = nvme_command_effects(ns->ctrl, ns, c->common.opcode);
119 	struct nvme_ns *ns = q->queuedata;
120 	struct block_device *bdev = ns ? ns->disk->part0 : NULL;
171 	struct nvme_ns *ns = q->queuedata;
193 	effects = nvme_passthru_start(ctrl, ns, cmd->common.opcode);
202 		nvme_passthru_end(ctrl, ns, effects, cmd, ret);
207 static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
228 	length = (io.nblocks + 1) << ns->head->lba_shift;
231 	    (ns->head->ms == ns->head->pi_size)) {
241 		meta_len = (io.nblocks + 1) * ns->head->ms;
245 	if (ns->head->features & NVME_NS_EXT_LBAS) {
256 	c.rw.nsid = cpu_to_le32(ns->head->ns_id);
265 	return nvme_submit_user_cmd(ns->queue, &c, io.addr, length, metadata,
270 					struct nvme_ns *ns, __u32 nsid)
272 	if (ns && nsid != ns->head->ns_id) {
276 			current->comm, nsid, ns->head->ns_id);
283 static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
297 	if (!nvme_validate_passthru_nsid(ctrl, ns, cmd.nsid))
313 	if (!nvme_cmd_allowed(ns, &c, 0, open_for_write))
319 	status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
331 static int nvme_user_cmd64(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
344 	if (!nvme_validate_passthru_nsid(ctrl, ns, cmd.nsid))
360 	if (!nvme_cmd_allowed(ns, &c, flags, open_for_write))
366 	status = nvme_submit_user_cmd(ns ? ns->queue : ctrl->admin_q, &c,
444 static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
449 	struct request_queue *q = ns ? ns->queue : ctrl->admin_q;
464 	if (!nvme_validate_passthru_nsid(ctrl, ns, le32_to_cpu(c.common.nsid)))
478 	if (!nvme_cmd_allowed(ns, &c, 0, ioucmd->file->f_mode & FMODE_WRITE))
556 static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
562 		return ns->head->ns_id;
564 		return nvme_user_cmd(ns->ctrl, ns, argp, flags, open_for_write);
574 		return nvme_submit_io(ns, argp);
579 		return nvme_user_cmd64(ns->ctrl, ns, argp, flags,
589 	struct nvme_ns *ns = bdev->bd_disk->private_data;
598 		return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, open_for_write);
599 	return nvme_ns_ioctl(ns, cmd, argp, flags, open_for_write);
604 	struct nvme_ns *ns =
610 		return nvme_ctrl_ioctl(ns->ctrl, cmd, argp, open_for_write);
611 	return nvme_ns_ioctl(ns, cmd, argp, 0, open_for_write);
624 static int nvme_ns_uring_cmd(struct nvme_ns *ns, struct io_uring_cmd *ioucmd,
627 	struct nvme_ctrl *ctrl = ns->ctrl;
638 		ret = nvme_uring_cmd_io(ctrl, ns, ioucmd, issue_flags, false);
641 		ret = nvme_uring_cmd_io(ctrl, ns, ioucmd, issue_flags, true);
652 	struct nvme_ns *ns = container_of(file_inode(ioucmd->file)->i_cdev,
655 	return nvme_ns_uring_cmd(ns, ioucmd, issue_flags);
670 static int nvme_ns_head_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,
675 	struct nvme_ctrl *ctrl = ns->ctrl;
678 	nvme_get_ctrl(ns->ctrl);
680 	ret = nvme_ctrl_ioctl(ns->ctrl, cmd, argp, open_for_write);
692 	struct nvme_ns *ns;
700 	ns = nvme_find_path(head);
701 	if (!ns)
706 	 * seperately and drop the ns SRCU reference early.  This avoids a
710 		return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx,
713 	ret = nvme_ns_ioctl(ns, cmd, argp, flags, open_for_write);
727 	struct nvme_ns *ns;
731 	ns = nvme_find_path(head);
732 	if (!ns)
736 		return nvme_ns_head_ctrl_ioctl(ns, cmd, argp, head, srcu_idx,
739 	ret = nvme_ns_ioctl(ns, cmd, argp, 0, open_for_write);
751 	struct nvme_ns *ns = nvme_find_path(head);
754 	if (ns)
755 		ret = nvme_ns_uring_cmd(ns, ioucmd, issue_flags);
791 	struct nvme_ns *ns;
800 	ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list);
801 	if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) {
810 	kref_get(&ns->kref);
813 	ret = nvme_user_cmd(ctrl, ns, argp, 0, open_for_write);
814 	nvme_put_ns(ns);