From patchwork Thu Nov 30 21:53:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 13475112 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=meta.com header.i=@meta.com header.b="a7OkFp5r" Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E776AA8 for ; Thu, 30 Nov 2023 13:53:21 -0800 (PST) Received: from pps.filterd (m0109332.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3AULK8Fg028718 for ; Thu, 30 Nov 2023 13:53:21 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=meta.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=s2048-2021-q4; bh=D8cR7pIBLts6CZuwL4HPtzl3bRNq46X/OdD7NBfGzuQ=; b=a7OkFp5rTNqnycKL2HMjNd0Eaf1MOs4iEq+bBxBvDQi+aowFXosWjyy+JmGmnr77i3H0 oni97y4wDGsoUgpe3apEv/mXWbdLp4LXlksOGxkwZFQqmsAEgu3WzqYqHn5Jfr+4Qvym Ygt+8Hy8Zo1Ixp1mD07I9lNy4DO3uGa8hK0qGEw7ALm3zWG6wR3KLYVWplPPfZcCniAa fGXatxPifU4PSp0PBHx2ewQ2CmCDbQV5m5VkEmyjZ9FASoR5+QOwUyeOXvLOU8guCwor 2y01FH+w97lQY8Q04Gvl4339Hm3KTBdb+BLBXQC+dq6vO2thmN8XiU4xETt8L+8tkTPW /A== Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3uphtvxqhd-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 30 Nov 2023 13:53:21 -0800 Received: from twshared13322.02.ash9.facebook.com (2620:10d:c0a8:1b::2d) by mail.thefacebook.com (2620:10d:c0a8:82::b) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.34; Thu, 30 Nov 2023 13:53:15 -0800 Received: by devbig007.nao1.facebook.com (Postfix, from userid 544533) id 5F9BB226BF686; Thu, 30 Nov 2023 13:53:10 -0800 (PST) From: Keith Busch To: , , CC: , , , , , Keith Busch Subject: [PATCHv5 2/4] nvme: use bio_integrity_map_user Date: Thu, 30 Nov 2023 13:53:07 -0800 Message-ID: <20231130215309.2923568-3-kbusch@meta.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231130215309.2923568-1-kbusch@meta.com> References: <20231130215309.2923568-1-kbusch@meta.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-ORIG-GUID: KjEDzxXVlEKeSuRkZMXIX5T12JI0TuRY X-Proofpoint-GUID: KjEDzxXVlEKeSuRkZMXIX5T12JI0TuRY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-30_22,2023-11-30_01,2023-05-22_02 From: Keith Busch Map user metadata buffers directly. Now that the bio tracks the metadata, nvme doesn't need special metadata handling and tracking with callbacks and additional fields in the pdu. Reviewed-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Signed-off-by: Keith Busch --- drivers/nvme/host/ioctl.c | 197 ++++++-------------------------------- 1 file changed, 29 insertions(+), 168 deletions(-) diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c index 529b9954d2b8c..32c9bcf491a33 100644 --- a/drivers/nvme/host/ioctl.c +++ b/drivers/nvme/host/ioctl.c @@ -96,58 +96,6 @@ static void __user *nvme_to_user_ptr(uintptr_t ptrval) return (void __user *)ptrval; } -static void *nvme_add_user_metadata(struct request *req, void __user *ubuf, - unsigned len, u32 seed) -{ - struct bio_integrity_payload *bip; - int ret = -ENOMEM; - void *buf; - struct bio *bio = req->bio; - - buf = kmalloc(len, GFP_KERNEL); - if (!buf) - goto out; - - if (req_op(req) == REQ_OP_DRV_OUT) { - ret = -EFAULT; - if (copy_from_user(buf, ubuf, len)) - goto out_free_meta; - } else { - memset(buf, 0, len); - } - - bip = bio_integrity_alloc(bio, GFP_KERNEL, 1); - if (IS_ERR(bip)) { - ret = PTR_ERR(bip); - goto out_free_meta; - } - - bip->bip_iter.bi_sector = seed; - ret = bio_integrity_add_page(bio, virt_to_page(buf), len, - offset_in_page(buf)); - if (ret != len) { - ret = -ENOMEM; - goto out_free_meta; - } - - req->cmd_flags |= REQ_INTEGRITY; - return buf; -out_free_meta: - kfree(buf); -out: - return ERR_PTR(ret); -} - -static int nvme_finish_user_metadata(struct request *req, void __user *ubuf, - void *meta, unsigned len, int ret) -{ - if (!ret && req_op(req) == REQ_OP_DRV_IN && - copy_to_user(ubuf, meta, len)) - ret = -EFAULT; - kfree(meta); - return ret; -} - static struct request *nvme_alloc_user_request(struct request_queue *q, struct nvme_command *cmd, blk_opf_t rq_flags, blk_mq_req_flags_t blk_flags) @@ -164,14 +112,12 @@ static struct request *nvme_alloc_user_request(struct request_queue *q, static int nvme_map_user_request(struct request *req, u64 ubuffer, unsigned bufflen, void __user *meta_buffer, unsigned meta_len, - u32 meta_seed, void **metap, struct io_uring_cmd *ioucmd, - unsigned int flags) + u32 meta_seed, struct io_uring_cmd *ioucmd, unsigned int flags) { struct request_queue *q = req->q; struct nvme_ns *ns = q->queuedata; struct block_device *bdev = ns ? ns->disk->part0 : NULL; struct bio *bio = NULL; - void *meta = NULL; int ret; if (ioucmd && (ioucmd->flags & IORING_URING_CMD_FIXED)) { @@ -193,18 +139,17 @@ static int nvme_map_user_request(struct request *req, u64 ubuffer, if (ret) goto out; + bio = req->bio; - if (bdev) + if (bdev) { bio_set_dev(bio, bdev); - - if (bdev && meta_buffer && meta_len) { - meta = nvme_add_user_metadata(req, meta_buffer, meta_len, - meta_seed); - if (IS_ERR(meta)) { - ret = PTR_ERR(meta); - goto out_unmap; + if (meta_buffer && meta_len) { + ret = bio_integrity_map_user(bio, meta_buffer, meta_len, + meta_seed); + if (ret) + goto out_unmap; + req->cmd_flags |= REQ_INTEGRITY; } - *metap = meta; } return ret; @@ -225,7 +170,6 @@ static int nvme_submit_user_cmd(struct request_queue *q, struct nvme_ns *ns = q->queuedata; struct nvme_ctrl *ctrl; struct request *req; - void *meta = NULL; struct bio *bio; u32 effects; int ret; @@ -237,7 +181,7 @@ static int nvme_submit_user_cmd(struct request_queue *q, req->timeout = timeout; if (ubuffer && bufflen) { ret = nvme_map_user_request(req, ubuffer, bufflen, meta_buffer, - meta_len, meta_seed, &meta, NULL, flags); + meta_len, meta_seed, NULL, flags); if (ret) return ret; } @@ -249,9 +193,6 @@ static int nvme_submit_user_cmd(struct request_queue *q, ret = nvme_execute_rq(req, false); if (result) *result = le64_to_cpu(nvme_req(req)->result.u64); - if (meta) - ret = nvme_finish_user_metadata(req, meta_buffer, meta, - meta_len, ret); if (bio) blk_rq_unmap_user(bio); blk_mq_free_request(req); @@ -446,19 +387,10 @@ struct nvme_uring_data { * Expect build errors if this grows larger than that. */ struct nvme_uring_cmd_pdu { - union { - struct bio *bio; - struct request *req; - }; - u32 meta_len; - u32 nvme_status; - union { - struct { - void *meta; /* kernel-resident buffer */ - void __user *meta_buffer; - }; - u64 result; - } u; + struct request *req; + struct bio *bio; + u64 result; + int status; }; static inline struct nvme_uring_cmd_pdu *nvme_uring_cmd_pdu( @@ -467,31 +399,6 @@ static inline struct nvme_uring_cmd_pdu *nvme_uring_cmd_pdu( return (struct nvme_uring_cmd_pdu *)&ioucmd->pdu; } -static void nvme_uring_task_meta_cb(struct io_uring_cmd *ioucmd, - unsigned issue_flags) -{ - struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd); - struct request *req = pdu->req; - int status; - u64 result; - - if (nvme_req(req)->flags & NVME_REQ_CANCELLED) - status = -EINTR; - else - status = nvme_req(req)->status; - - result = le64_to_cpu(nvme_req(req)->result.u64); - - if (pdu->meta_len) - status = nvme_finish_user_metadata(req, pdu->u.meta_buffer, - pdu->u.meta, pdu->meta_len, status); - if (req->bio) - blk_rq_unmap_user(req->bio); - blk_mq_free_request(req); - - io_uring_cmd_done(ioucmd, status, result, issue_flags); -} - static void nvme_uring_task_cb(struct io_uring_cmd *ioucmd, unsigned issue_flags) { @@ -499,8 +406,7 @@ static void nvme_uring_task_cb(struct io_uring_cmd *ioucmd, if (pdu->bio) blk_rq_unmap_user(pdu->bio); - - io_uring_cmd_done(ioucmd, pdu->nvme_status, pdu->u.result, issue_flags); + io_uring_cmd_done(ioucmd, pdu->status, pdu->result, issue_flags); } static enum rq_end_io_ret nvme_uring_cmd_end_io(struct request *req, @@ -509,53 +415,24 @@ static enum rq_end_io_ret nvme_uring_cmd_end_io(struct request *req, struct io_uring_cmd *ioucmd = req->end_io_data; struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd); - req->bio = pdu->bio; - if (nvme_req(req)->flags & NVME_REQ_CANCELLED) { - pdu->nvme_status = -EINTR; - } else { - pdu->nvme_status = nvme_req(req)->status; - if (!pdu->nvme_status) - pdu->nvme_status = blk_status_to_errno(err); - } - pdu->u.result = le64_to_cpu(nvme_req(req)->result.u64); + if (nvme_req(req)->flags & NVME_REQ_CANCELLED) + pdu->status = -EINTR; + else + pdu->status = nvme_req(req)->status; + pdu->result = le64_to_cpu(nvme_req(req)->result.u64); /* * For iopoll, complete it directly. * Otherwise, move the completion to task work. */ - if (blk_rq_is_poll(req)) { - WRITE_ONCE(ioucmd->cookie, NULL); + if (blk_rq_is_poll(req)) nvme_uring_task_cb(ioucmd, IO_URING_F_UNLOCKED); - } else { + else io_uring_cmd_do_in_task_lazy(ioucmd, nvme_uring_task_cb); - } return RQ_END_IO_FREE; } -static enum rq_end_io_ret nvme_uring_cmd_end_io_meta(struct request *req, - blk_status_t err) -{ - struct io_uring_cmd *ioucmd = req->end_io_data; - struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd); - - req->bio = pdu->bio; - pdu->req = req; - - /* - * For iopoll, complete it directly. - * Otherwise, move the completion to task work. - */ - if (blk_rq_is_poll(req)) { - WRITE_ONCE(ioucmd->cookie, NULL); - nvme_uring_task_meta_cb(ioucmd, IO_URING_F_UNLOCKED); - } else { - io_uring_cmd_do_in_task_lazy(ioucmd, nvme_uring_task_meta_cb); - } - - return RQ_END_IO_NONE; -} - 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) { @@ -567,7 +444,6 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns, struct request *req; blk_opf_t rq_flags = REQ_ALLOC_CACHE; blk_mq_req_flags_t blk_flags = 0; - void *meta = NULL; int ret; c.common.opcode = READ_ONCE(cmd->opcode); @@ -615,27 +491,16 @@ static int nvme_uring_cmd_io(struct nvme_ctrl *ctrl, struct nvme_ns *ns, if (d.addr && d.data_len) { ret = nvme_map_user_request(req, d.addr, d.data_len, nvme_to_user_ptr(d.metadata), - d.metadata_len, 0, &meta, ioucmd, vec); + d.metadata_len, 0, ioucmd, vec); if (ret) return ret; } - if (blk_rq_is_poll(req)) { - ioucmd->flags |= IORING_URING_CMD_POLLED; - WRITE_ONCE(ioucmd->cookie, req); - } - /* to free bio on completion, as req->bio will be null at that time */ pdu->bio = req->bio; - pdu->meta_len = d.metadata_len; + pdu->req = req; req->end_io_data = ioucmd; - if (pdu->meta_len) { - pdu->u.meta = meta; - pdu->u.meta_buffer = nvme_to_user_ptr(d.metadata); - req->end_io = nvme_uring_cmd_end_io_meta; - } else { - req->end_io = nvme_uring_cmd_end_io; - } + req->end_io = nvme_uring_cmd_end_io; blk_execute_rq_nowait(req, false); return -EIOCBQUEUED; } @@ -786,16 +651,12 @@ int nvme_ns_chr_uring_cmd_iopoll(struct io_uring_cmd *ioucmd, struct io_comp_batch *iob, unsigned int poll_flags) { - struct request *req; - int ret = 0; - - if (!(ioucmd->flags & IORING_URING_CMD_POLLED)) - return 0; + struct nvme_uring_cmd_pdu *pdu = nvme_uring_cmd_pdu(ioucmd); + struct request *req = pdu->req; - req = READ_ONCE(ioucmd->cookie); if (req && blk_rq_is_poll(req)) - ret = blk_rq_poll(req, iob, poll_flags); - return ret; + return blk_rq_poll(req, iob, poll_flags); + return 0; } #ifdef CONFIG_NVME_MULTIPATH static int nvme_ns_head_ctrl_ioctl(struct nvme_ns *ns, unsigned int cmd,