From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88762C77B76 for ; Fri, 21 Apr 2023 11:47:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231966AbjDULrD (ORCPT ); Fri, 21 Apr 2023 07:47:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231794AbjDULrB (ORCPT ); Fri, 21 Apr 2023 07:47:01 -0400 Received: from mail-wm1-f41.google.com (mail-wm1-f41.google.com [209.85.128.41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B466BC3; Fri, 21 Apr 2023 04:46:59 -0700 (PDT) Received: by mail-wm1-f41.google.com with SMTP id 5b1f17b1804b1-3f09b9ac51dso46714125e9.0; Fri, 21 Apr 2023 04:46:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682077618; x=1684669618; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UXPdTSA6S0G0fQ/xI7HseGs1qPi1doE/WEhehIGxGzU=; b=Fh/ppJmnl7tXOHCdlvqnCDnVI2geiDEkG3MsM6onpwlwJq9bh2qyOgATxSGx8v930n fdWGbK9XmRn4bQgxwJYGLYxR3ZvF3ZOnOAx9BYZvJqaskXpPpMtbW6X8dw9JHdHtGOvM 3AJOSYwpozmbzTx2SO3b6/3/ld3+dsaBcuJDktqUxwVcQZpSLSLi8QPwyvPLs/r4fMNn fftuxJd3uTGBfJdXf/IPh8UkduilrRYlaSs2q17KvzWwYqibOj0iCtzalOGkmODyVf+I oYKsiLfOkSXOBkGtpRRPjXR9hPr7fGR2H+sO/Z8P+SD3mP5uQvh9zPbEri7hO/VNpwtC bmsg== X-Gm-Message-State: AAQBX9cGKjxxeCTiFLkILMA/bm9/k/4k2PnBmSHRw8YifJ3ZnxOGHOUT Cvra/Y84+jTCZrlrsAevGhqjADPdFp+GKQ== X-Google-Smtp-Source: AKy350Yp3XSiyxy6Ks3P6ULJ59nqsu8vWJgCG7uCEQ0jPznM7pR8IwHciHWn7mLLw+RI9ZfdW33TXQ== X-Received: by 2002:a5d:518e:0:b0:2fa:7203:5bae with SMTP id k14-20020a5d518e000000b002fa72035baemr7344515wrv.18.1682077617722; Fri, 21 Apr 2023 04:46:57 -0700 (PDT) Received: from localhost (fwdproxy-cln-012.fbsv.net. [2a03:2880:31ff:c::face:b00c]) by smtp.gmail.com with ESMTPSA id y5-20020a1c4b05000000b003e91b9a92c9sm4621191wma.24.2023.04.21.04.46.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Apr 2023 04:46:57 -0700 (PDT) From: Breno Leitao To: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, asml.silence@gmail.com, axboe@kernel.dk Cc: leit@fb.com, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, sagi@grimberg.me, hch@lst.de, kbusch@kernel.org, ming.lei@redhat.com Subject: [PATCH v2 2/3] io_uring: Pass whole sqe to commands Date: Fri, 21 Apr 2023 04:44:39 -0700 Message-Id: <20230421114440.3343473-3-leitao@debian.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230421114440.3343473-1-leitao@debian.org> References: <20230421114440.3343473-1-leitao@debian.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Currently uring CMD operation relies on having large SQEs, but future operations might want to use normal SQE. The io_uring_cmd currently only saves the payload (cmd) part of the SQE, but, for commands that use normal SQE size, it might be necessary to access the initial SQE fields outside of the payload/cmd block. So, saves the whole SQE other than just the pdu. This changes slightly how the io_uring_cmd works, since the cmd structures and callbacks are not opaque to io_uring anymore. I.e, the callbacks can look at the SQE entries, not only, in the cmd structure. The main advantage is that we don't need to create custom structures for simple commands. Suggested-by: Pavel Begunkov Signed-off-by: Breno Leitao Reviewed-by: Keith Busch --- drivers/block/ublk_drv.c | 24 ++++++++++++------------ drivers/nvme/host/ioctl.c | 3 ++- include/linux/io_uring.h | 2 +- io_uring/opdef.c | 2 +- io_uring/uring_cmd.c | 10 ++++------ 5 files changed, 20 insertions(+), 21 deletions(-) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index c73cc57ec547..ec23a3c9fac8 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -1263,7 +1263,7 @@ static void ublk_handle_need_get_data(struct ublk_device *ub, int q_id, static int ublk_ch_uring_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags) { - struct ublksrv_io_cmd *ub_cmd = (struct ublksrv_io_cmd *)cmd->cmd; + struct ublksrv_io_cmd *ub_cmd = (struct ublksrv_io_cmd *)cmd->sqe->cmd; struct ublk_device *ub = cmd->file->private_data; struct ublk_queue *ubq; struct ublk_io *io; @@ -1567,7 +1567,7 @@ static struct ublk_device *ublk_get_device_from_id(int idx) static int ublk_ctrl_start_dev(struct ublk_device *ub, struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; int ublksrv_pid = (int)header->data[0]; struct gendisk *disk; int ret = -EINVAL; @@ -1630,7 +1630,7 @@ static int ublk_ctrl_start_dev(struct ublk_device *ub, struct io_uring_cmd *cmd) static int ublk_ctrl_get_queue_affinity(struct ublk_device *ub, struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; void __user *argp = (void __user *)(unsigned long)header->addr; cpumask_var_t cpumask; unsigned long queue; @@ -1681,7 +1681,7 @@ static inline void ublk_dump_dev_info(struct ublksrv_ctrl_dev_info *info) static int ublk_ctrl_add_dev(struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; void __user *argp = (void __user *)(unsigned long)header->addr; struct ublksrv_ctrl_dev_info info; struct ublk_device *ub; @@ -1844,7 +1844,7 @@ static int ublk_ctrl_del_dev(struct ublk_device **p_ub) static inline void ublk_ctrl_cmd_dump(struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; pr_devel("%s: cmd_op %x, dev id %d qid %d data %llx buf %llx len %u\n", __func__, cmd->cmd_op, header->dev_id, header->queue_id, @@ -1863,7 +1863,7 @@ static int ublk_ctrl_stop_dev(struct ublk_device *ub) static int ublk_ctrl_get_dev_info(struct ublk_device *ub, struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; void __user *argp = (void __user *)(unsigned long)header->addr; if (header->len < sizeof(struct ublksrv_ctrl_dev_info) || !header->addr) @@ -1894,7 +1894,7 @@ static void ublk_ctrl_fill_params_devt(struct ublk_device *ub) static int ublk_ctrl_get_params(struct ublk_device *ub, struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; void __user *argp = (void __user *)(unsigned long)header->addr; struct ublk_params_header ph; int ret; @@ -1925,7 +1925,7 @@ static int ublk_ctrl_get_params(struct ublk_device *ub, static int ublk_ctrl_set_params(struct ublk_device *ub, struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; void __user *argp = (void __user *)(unsigned long)header->addr; struct ublk_params_header ph; int ret = -EFAULT; @@ -1983,7 +1983,7 @@ static void ublk_queue_reinit(struct ublk_device *ub, struct ublk_queue *ubq) static int ublk_ctrl_start_recovery(struct ublk_device *ub, struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; int ret = -EINVAL; int i; @@ -2025,7 +2025,7 @@ static int ublk_ctrl_start_recovery(struct ublk_device *ub, static int ublk_ctrl_end_recovery(struct ublk_device *ub, struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; int ublksrv_pid = (int)header->data[0]; int ret = -EINVAL; @@ -2092,7 +2092,7 @@ static int ublk_char_dev_permission(struct ublk_device *ub, static int ublk_ctrl_uring_cmd_permission(struct ublk_device *ub, struct io_uring_cmd *cmd) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; bool unprivileged = ub->dev_info.flags & UBLK_F_UNPRIVILEGED_DEV; void __user *argp = (void __user *)(unsigned long)header->addr; char *dev_path = NULL; @@ -2171,7 +2171,7 @@ static int ublk_ctrl_uring_cmd_permission(struct ublk_device *ub, static int ublk_ctrl_uring_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags) { - struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->cmd; + struct ublksrv_ctrl_cmd *header = (struct ublksrv_ctrl_cmd *)cmd->sqe->cmd; struct ublk_device *ub = NULL; int ret = -EINVAL; diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c index d24ea2e05156..b69604485670 100644 --- a/drivers/nvme/host/ioctl.c +++ b/drivers/nvme/host/ioctl.c @@ -552,7 +552,8 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns, struct io_uring_cmd *ioucmd, unsigned int issue_flags, bool vec) { struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd); - const struct nvme_uring_cmd *cmd = ioucmd->cmd; + const struct nvme_uring_cmd *cmd = + (struct nvme_uring_cmd *)ioucmd->sqe->cmd; struct request_queue *q = ns ? ns->queue : ctrl->admin_q; struct nvme_uring_data d; struct nvme_command c; diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h index 35b9328ca335..2dfc81dd6d1a 100644 --- a/include/linux/io_uring.h +++ b/include/linux/io_uring.h @@ -24,7 +24,7 @@ enum io_uring_cmd_flags { struct io_uring_cmd { struct file *file; - const void *cmd; + const struct io_uring_sqe *sqe; union { /* callback to defer completions to task context */ void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned); diff --git a/io_uring/opdef.c b/io_uring/opdef.c index cca7c5b55208..3b9c6489b8b6 100644 --- a/io_uring/opdef.c +++ b/io_uring/opdef.c @@ -627,7 +627,7 @@ const struct io_cold_def io_cold_defs[] = { }, [IORING_OP_URING_CMD] = { .name = "URING_CMD", - .async_size = uring_cmd_pdu_size(1), + .async_size = 2 * sizeof(struct io_uring_sqe), .prep_async = io_uring_cmd_prep_async, }, [IORING_OP_SEND_ZC] = { diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c index 5113c9a48583..a1be746cd009 100644 --- a/io_uring/uring_cmd.c +++ b/io_uring/uring_cmd.c @@ -69,15 +69,13 @@ 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; + size_t size = uring_sqe_size(req->ctx); 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); - ioucmd->cmd = req->async_data; + memcpy(req->async_data, ioucmd->sqe, size); + ioucmd->sqe = req->async_data; return 0; } @@ -103,7 +101,7 @@ int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) req->imu = ctx->user_bufs[index]; io_req_set_rsrc_node(req, ctx, 0); } - ioucmd->cmd = sqe->cmd; + ioucmd->sqe = sqe; ioucmd->cmd_op = READ_ONCE(sqe->cmd_op); return 0; } -- 2.34.1