From patchwork Tue Jun 27 18:36:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nitesh Shetty X-Patchwork-Id: 13295369 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 6316FEB64DC for ; Wed, 28 Jun 2023 08:29:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233508AbjF1I3k (ORCPT ); Wed, 28 Jun 2023 04:29:40 -0400 Received: from mailout4.samsung.com ([203.254.224.34]:14590 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233686AbjF1I1d (ORCPT ); Wed, 28 Jun 2023 04:27:33 -0400 Received: from epcas5p3.samsung.com (unknown [182.195.41.41]) by mailout4.samsung.com (KnoxPortal) with ESMTP id 20230628070826epoutp0487afffb79bcde676e7581980519a2a9f~swPIpu86R2161821618epoutp04f for ; Wed, 28 Jun 2023 07:08:26 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout4.samsung.com 20230628070826epoutp0487afffb79bcde676e7581980519a2a9f~swPIpu86R2161821618epoutp04f DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1687936106; bh=gM3eQkiO35/pYv9p8lp24XhZkp6F8WtcDIXRI/8PkPM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OZRd5NR6WT6Hx2nAdakSCtS9G/dXTn3I0n5wFZOhdmefvZyyePCcvHdc7GOWKPHRM STH1ufw38RnGT6Z2FXzsxBMRUNOa0SORlF7AcIXHMf5dP9Bcw2LY7VFhDd3N5rTT64 TTMlGoVtWR5J9lnh9dHoZhrDX2ZarD1syq47pbH4= Received: from epsnrtp3.localdomain (unknown [182.195.42.164]) by epcas5p1.samsung.com (KnoxPortal) with ESMTP id 20230628070825epcas5p12f0105c8988933eb58c7a33998c975d6~swPIAeKkI0239002390epcas5p1b; Wed, 28 Jun 2023 07:08:25 +0000 (GMT) Received: from epsmgec5p1-new.samsung.com (unknown [182.195.38.183]) by epsnrtp3.localdomain (Postfix) with ESMTP id 4QrXjg0FkXz4x9Pw; Wed, 28 Jun 2023 07:08:23 +0000 (GMT) Received: from epcas5p3.samsung.com ( [182.195.41.41]) by epsmgec5p1-new.samsung.com (Symantec Messaging Gateway) with SMTP id AE.8E.55173.66CDB946; Wed, 28 Jun 2023 16:08:22 +0900 (KST) Received: from epsmtrp1.samsung.com (unknown [182.195.40.13]) by epcas5p2.samsung.com (KnoxPortal) with ESMTPA id 20230627184049epcas5p293a6e6b75c93e39c7fca1a702e3e3774~smCXwvC5p0137701377epcas5p2z; Tue, 27 Jun 2023 18:40:49 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20230627184049epsmtrp1b3edff9691c1a969e4c08d7fc25d4841~smCXvlbDA1784017840epsmtrp1E; Tue, 27 Jun 2023 18:40:49 +0000 (GMT) X-AuditID: b6c32a50-e61c07000001d785-0b-649bdc660b65 Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 15.49.34491.03D2B946; Wed, 28 Jun 2023 03:40:48 +0900 (KST) Received: from green245.sa.corp.samsungelectronics.net (unknown [107.99.41.245]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20230627184045epsmtip20437419e8f057cf4b4ca6c996362aed3~smCUHgHlT0383003830epsmtip2g; Tue, 27 Jun 2023 18:40:45 +0000 (GMT) From: Nitesh Shetty To: Jens Axboe , Jonathan Corbet , Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Keith Busch , Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni , Alexander Viro , Christian Brauner Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, willy@infradead.org, hare@suse.de, djwong@kernel.org, bvanassche@acm.org, ming.lei@redhat.com, dlemoal@kernel.org, nitheshshetty@gmail.com, gost.dev@samsung.com, Nitesh Shetty , Anuj Gupta , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v13 6/9] nvmet: add copy command support for bdev and file ns Date: Wed, 28 Jun 2023 00:06:20 +0530 Message-Id: <20230627183629.26571-7-nj.shetty@samsung.com> X-Mailer: git-send-email 2.35.1.500.gb896f729e2 In-Reply-To: <20230627183629.26571-1-nj.shetty@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA02Te1BUVRzH59x7ubug6OWhnDYr5lYQII/FfRxeaZMT19QgycmSoI29AQK7 6z4yrRkWFRowWMCAWBwkYQiB4R2zCJu4oLxqqAEkGAXSpSICBJJsEIhtofzv8/vO7/t7nTlc 3LGCw+PGy9SsUiZJpEk7ornDw8P7wztFUr++wkBU23sLR2ezV3BUdVdHoumOBYDyH/yNI3P7 ZwANmLehiet7kXG2yAaNtLdgqO1KLoauVt3EUK7pNkCTQ3oMGUe90FdpZQRqM/YQaODaJRJd Lp/koAvDBhJ93bWKIdPFcxgymFMAal6+jKOa6TkCdY8+jfpXumzQ8qNL5L5dzMDgQaZFf5fD 9I/VE0xjhScz8L2GaahMJ5nGsmSmdURLMqVZF22YzHOzJDM/OUowc98OkUxWUyVgGvs+YRYb nmUazDNYOPVuQnAcK5GySldWFiOXxstiQ+iDEdGvRgtFfnxvfgAS064ySRIbQu8/FO79Wnzi +nVo148kiZp1KVyiUtG+Lwcr5Ro16xonV6lDaFYhTVQIFD4qSZJKI4v1kbHqQL6fn79wPfH9 hLjGzDlccSP44zvjPwAtqPbPALZcSAmgqXqNzAB2XEeqDcC1nw021mABwKKuBxvBEoArpWtg 0/IwJw+zsCNlBLBghbAmpWLwRvGf67W4XJLygn1rXIvuTGlxWNdaCiwBTnXh8NZ8Cm5xO1Fh sCy1m7AYCOpF+Ph+kEW2pwJhWX0nxyJDyhfqxh0ssi0VBFv7O22sKQ6wp9BMWBinnoPnvinC LeUh1WsLW4zTuHXQ/bCko22DneDvXU0cK/PglC5tg0/Bq19UkFbzeQD1w/qNLffC1F4dbhkC pzxg7TVfq/wMzOutwayNt8HMZTNm1e2hoXiTn4fVtSWklZ+Ct/9K2WAGTmV9zrEeKwvAyoUJ TjZw1T+xkP6JhfT/ty4BeCXgsQpVUiwbI1TwvWXsqf+eOUae1AD+/TKe4QZQVbfiYwIYF5gA 5OK0s/3ORwVSR3up5PQZVimPVmoSWZUJCNcPnoPzdsTI1/+cTB3NFwT4CUQikSBgj4hPu9iP haZLHalYiZpNYFkFq9z0YVxbnhY7oj3RImw5nEu21pWMicg3Zk6nmdIcyu/fe0UR2uRh1H2K VvMiw6j6Cf6bQz0Oe9oP/TSvTcYn5ruHY3zFZ+UFYt3brx/JR0LHwshuH8Y36sBKRvj1Y8f0 6Sf1i7998B2Bhh6+VTba5D478GPZSPrhX6a27ir3CZq2XRK8kHreYNx9PGpOfG9HKRxkbL32 LYy6u/zafWbSziBUd9b5746MmBXX1DvRwUlz45rt7B9RRTPNYXk738vpveJ2oeboyWqXrY/F FSGLgUtbaHHI6vEo3lFTfZB9xIHtE1K3Yn9NbuCX2frUxFBw4qXe6nylyFnpvsVNwnunJf9m WnKmZtB9tpAmVHESvieuVEn+AbqXXlW7BAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrNIsWRmVeSWpSXmKPExsWy7bCSvK6B7uwUg4vvrS3WnzrGbNE04S+z xeq7/WwWrw9/YrSY9uEns8WTA+2MFpef8Fk82G9vsffdbFaLmwd2MlnsWTSJyWLl6qNMFpMO XWO0eHp1FpPF3lvaFgvblrBY7Nl7ksXi8q45bBbzlz1lt+i+voPNYvnxf0wWhyY3M1nseNLI aLHt93xmi3Wv37NYnLglbXH+73FWi98/5rA5yHhcvuLtsXPWXXaP8/c2snhsXqHlcflsqcem VZ1sHpuX1HvsvtnA5rG4bzKrR2/zOzaPj09vsXi833eVzaNvyypGj82nqz0+b5Lz2PTkLVOA QBSXTUpqTmZZapG+XQJXxube98wFB20q7ty/wNjAuMaoi5GTQ0LAROLrxKlMXYxcHEICuxkl Zv3exwqRkJRY9vcIM4QtLLHy33N2iKJmJon2HbeAOjg42AS0JU7/5wCJiwh0MUt07nzHAtLA LHCbWWLmWRkQW1jAV+Jc21k2kHoWAVWJP4+tQcK8AlYSSzYeYQcJSwjoS/TfFwQJcwpYS+w+ f4QVJCwEVPL+eABEtaDEyZlPoIbLSzRvnc08gVFgFpLULCSpBYxMqxglUwuKc9Nziw0LDPNS y/WKE3OLS/PS9ZLzczcxguNfS3MH4/ZVH/QOMTJxMB5ilOBgVhLhFfsxPUWINyWxsiq1KD++ qDQntfgQozQHi5I4r/iL3hQhgfTEktTs1NSC1CKYLBMHp1QD05HLIv0ftOJFOpq4J78sPeL6 ImF/wsuwTQvZJ/AK7/ojdF5I6d9/ZakJ1bnOX1MP2e183ySQN0lFzLgv/rzWvm1nwq8aOjmn lwqtNJ7r2JtemS7yOG1mjv/Gte4OTgbSIjY/K95N/XSpVGfHfjF+6ZjN3P/65lZnnXGKDW77 tOu6jvaLCUY9Vx+8MF5sdO9p4Cnb8HU7og9Vc2t4c1YY7J9WK5HkIPlja+ccjafeXHGfTT4U accdq7WRvmcrWXWxu+7Whx3vuww8+3jib9zIV5CL3TPjjA5bnEjEWq7ygycXflk742iL8KLM gr17FXM394kVua0S1Vo7882B6KyfLEKii1osIz/8v1Rd+GeaEktxRqKhFnNRcSIAPl7Pmm4D AAA= X-CMS-MailID: 20230627184049epcas5p293a6e6b75c93e39c7fca1a702e3e3774 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230627184049epcas5p293a6e6b75c93e39c7fca1a702e3e3774 References: <20230627183629.26571-1-nj.shetty@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Add support for handling nvme_cmd_copy command on target. For bdev-ns we call into blkdev_copy_offload, which the block layer completes by a offloaded copy request to backend bdev or by emulating the request. For file-ns we call vfs_copy_file_range to service our request. Currently target always shows copy capability by setting NVME_CTRL_ONCS_COPY in controller ONCS. loop target has copy support, which can be used to test copy offload. Signed-off-by: Nitesh Shetty Signed-off-by: Anuj Gupta --- drivers/nvme/target/admin-cmd.c | 9 ++++- drivers/nvme/target/io-cmd-bdev.c | 62 +++++++++++++++++++++++++++++++ drivers/nvme/target/io-cmd-file.c | 52 ++++++++++++++++++++++++++ drivers/nvme/target/nvmet.h | 1 + 4 files changed, 122 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c index 39cb570f833d..8e644b8ec0fd 100644 --- a/drivers/nvme/target/admin-cmd.c +++ b/drivers/nvme/target/admin-cmd.c @@ -433,8 +433,7 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req) id->nn = cpu_to_le32(NVMET_MAX_NAMESPACES); id->mnan = cpu_to_le32(NVMET_MAX_NAMESPACES); id->oncs = cpu_to_le16(NVME_CTRL_ONCS_DSM | - NVME_CTRL_ONCS_WRITE_ZEROES); - + NVME_CTRL_ONCS_WRITE_ZEROES | NVME_CTRL_ONCS_COPY); /* XXX: don't report vwc if the underlying device is write through */ id->vwc = NVME_CTRL_VWC_PRESENT; @@ -536,6 +535,12 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req) if (req->ns->bdev) nvmet_bdev_set_limits(req->ns->bdev, id); + else { + id->msrc = (__force u8)to0based(BIO_MAX_VECS - 1); + id->mssrl = cpu_to_le16(BIO_MAX_VECS << + (PAGE_SHIFT - SECTOR_SHIFT)); + id->mcl = cpu_to_le32(le16_to_cpu(id->mssrl)); + } /* * We just provide a single LBA format that matches what the diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index 2733e0158585..5c4c6a460cfa 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -46,6 +46,18 @@ void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id) id->npda = id->npdg; /* NOWS = Namespace Optimal Write Size */ id->nows = to0based(bdev_io_opt(bdev) / bdev_logical_block_size(bdev)); + + if (bdev_max_copy_sectors(bdev)) { + id->msrc = id->msrc; + id->mssrl = cpu_to_le16((bdev_max_copy_sectors(bdev) << + SECTOR_SHIFT) / bdev_logical_block_size(bdev)); + id->mcl = cpu_to_le32((__force u32)id->mssrl); + } else { + id->msrc = (__force u8)to0based(BIO_MAX_VECS - 1); + id->mssrl = cpu_to_le16((BIO_MAX_VECS << PAGE_SHIFT) / + bdev_logical_block_size(bdev)); + id->mcl = cpu_to_le32((__force u32)id->mssrl); + } } void nvmet_bdev_ns_disable(struct nvmet_ns *ns) @@ -184,6 +196,21 @@ static void nvmet_bio_done(struct bio *bio) nvmet_req_bio_put(req, bio); } +static void nvmet_bdev_copy_end_io(void *private, int comp_len) +{ + struct nvmet_req *req = (struct nvmet_req *)private; + u16 status; + + if (comp_len == req->copy_len) { + req->cqe->result.u32 = cpu_to_le32(1); + status = errno_to_nvme_status(req, 0); + } else { + req->cqe->result.u32 = cpu_to_le32(0); + status = errno_to_nvme_status(req, (__force u16)BLK_STS_IOERR); + } + nvmet_req_complete(req, status); +} + #ifdef CONFIG_BLK_DEV_INTEGRITY static int nvmet_bdev_alloc_bip(struct nvmet_req *req, struct bio *bio, struct sg_mapping_iter *miter) @@ -450,6 +477,37 @@ static void nvmet_bdev_execute_write_zeroes(struct nvmet_req *req) } } +/* At present we handle only one range entry, since copy offload is aligned with + * copy_file_range, only one entry is passed from block layer. + */ +static void nvmet_bdev_execute_copy(struct nvmet_req *req) +{ + struct nvme_copy_range range; + struct nvme_command *cmd = req->cmd; + ssize_t ret; + u16 status; + + status = nvmet_copy_from_sgl(req, 0, &range, sizeof(range)); + if (status) + goto out; + + ret = blkdev_copy_offload(req->ns->bdev, + le64_to_cpu(cmd->copy.sdlba) << req->ns->blksize_shift, + req->ns->bdev, + le64_to_cpu(range.slba) << req->ns->blksize_shift, + (le16_to_cpu(range.nlb) + 1) << req->ns->blksize_shift, + nvmet_bdev_copy_end_io, (void *)req, GFP_KERNEL); + if (ret) { + req->cqe->result.u32 = cpu_to_le32(0); + status = blk_to_nvme_status(req, BLK_STS_IOERR); + goto out; + } + + return; +out: + nvmet_req_complete(req, errno_to_nvme_status(req, status)); +} + u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req) { switch (req->cmd->common.opcode) { @@ -468,6 +526,10 @@ u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req) case nvme_cmd_write_zeroes: req->execute = nvmet_bdev_execute_write_zeroes; return 0; + case nvme_cmd_copy: + req->execute = nvmet_bdev_execute_copy; + return 0; + default: return nvmet_report_invalid_opcode(req); } diff --git a/drivers/nvme/target/io-cmd-file.c b/drivers/nvme/target/io-cmd-file.c index 2d068439b129..f61aa834f7a5 100644 --- a/drivers/nvme/target/io-cmd-file.c +++ b/drivers/nvme/target/io-cmd-file.c @@ -322,6 +322,49 @@ static void nvmet_file_dsm_work(struct work_struct *w) } } +static void nvmet_file_copy_work(struct work_struct *w) +{ + struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); + int nr_range = req->cmd->copy.nr_range + 1; + u16 status = 0; + int src, id; + ssize_t len, ret; + loff_t pos; + + pos = le64_to_cpu(req->cmd->copy.sdlba) << req->ns->blksize_shift; + if (unlikely(pos + req->transfer_len > req->ns->size)) { + nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); + return; + } + + for (id = 0 ; id < nr_range; id++) { + struct nvme_copy_range range; + + status = nvmet_copy_from_sgl(req, id * sizeof(range), &range, + sizeof(range)); + if (status) + goto out; + + src = (le64_to_cpu(range.slba) << (req->ns->blksize_shift)); + len = (le16_to_cpu(range.nlb) + 1) << (req->ns->blksize_shift); + ret = vfs_copy_file_range(req->ns->file, src, req->ns->file, + pos, len, 0); + if (ret != len) { + pos += ret; + req->cqe->result.u32 = cpu_to_le32(id); + if (ret < 0) + status = errno_to_nvme_status(req, ret); + else + status = errno_to_nvme_status(req, -EIO); + goto out; + } else + pos += len; + } + +out: + nvmet_req_complete(req, status); +} + static void nvmet_file_execute_dsm(struct nvmet_req *req) { if (!nvmet_check_data_len_lte(req, nvmet_dsm_len(req))) @@ -330,6 +373,12 @@ static void nvmet_file_execute_dsm(struct nvmet_req *req) queue_work(nvmet_wq, &req->f.work); } +static void nvmet_file_execute_copy(struct nvmet_req *req) +{ + INIT_WORK(&req->f.work, nvmet_file_copy_work); + queue_work(nvmet_wq, &req->f.work); +} + static void nvmet_file_write_zeroes_work(struct work_struct *w) { struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); @@ -376,6 +425,9 @@ u16 nvmet_file_parse_io_cmd(struct nvmet_req *req) case nvme_cmd_write_zeroes: req->execute = nvmet_file_execute_write_zeroes; return 0; + case nvme_cmd_copy: + req->execute = nvmet_file_execute_copy; + return 0; default: return nvmet_report_invalid_opcode(req); } diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index 6cf723bc664e..c6fb515ee1c5 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -393,6 +393,7 @@ struct nvmet_req { struct device *p2p_client; u16 error_loc; u64 error_slba; + size_t copy_len; }; #define NVMET_MAX_MPOOL_BVEC 16