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Wed, 6 Dec 2023 10:12:18 +0000 (GMT) Received: from epsmgms1p2new.samsung.com (unknown [182.195.42.42]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20231206101218epsmtrp217a2e5b0a9cb015fb653b55a7c6ddaed~eNmolF_vN1007210072epsmtrp2O; Wed, 6 Dec 2023 10:12:18 +0000 (GMT) X-AuditID: b6c32a4a-ff1ff70000002719-aa-6570490359be Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p2new.samsung.com (Symantec Messaging Gateway) with SMTP id 80.62.08817.20940756; Wed, 6 Dec 2023 19:12:18 +0900 (KST) Received: from localhost.localdomain (unknown [107.99.41.245]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20231206101214epsmtip248d44b17f67df20f2c2e9a1abb6e15b2~eNmkNOL7S1181011810epsmtip2L; Wed, 6 Dec 2023 10:12:13 +0000 (GMT) From: Kanchan Joshi To: Jens Axboe , Jonathan Corbet , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , dm-devel@lists.linux.dev, Keith Busch , Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni , Alexander Viro , Christian Brauner Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, nitheshshetty@gmail.com, anuj1072538@gmail.com, gost.dev@samsung.com, mcgrof@kernel.org, Nitesh Shetty , Hannes Reinecke , 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 v18 08/12] nvmet: add copy command support for bdev and file ns Date: Wed, 6 Dec 2023 15:32:40 +0530 Message-Id: <20231206100253.13100-9-joshi.k@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231206100253.13100-1-joshi.k@samsung.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA02TeVBTVxTG57738pLQiU2DHW/jTAmvwzBgWWIhvSh0UcY+u4HTzbbTgUje AJKtWYq2MqKMIBjZUh1Jla1oKahUAkyQTaHsBSyILC1M0aRQEAFRawWkCYmt//3OPd83Z75z 53BwQRZbyIlX6hiNUiqnSDeipsXH2w/fqWYCr8+xUEVXG44W7i8R6HD2Co7Kx7JINNNyFyDr lTSACovPEGjkSi2G6otzMfRjeSuGcptvAGQbNGGoYXQTKkotIVB9QyeBBi6fJlHBORsbHRuy kOiH9scYGs62AZRzdBBDFushgGqWCnB0cWaOQB2jG1HfSjvrDSFdaxpj033jlwh6oEdPV5al k7S55CA9Zc4DdN1IMkl/n2lk0cdT7pD0gm2UoOcaB0k6s6oM0Obub+jFyhfpSussFvnsZwmh cYxUxmhEjDJGJYtXxoZR73wQtT0qWBIo9hOHoFcpkVKqYMKo8Hcj/XbEy+0roURfSeV6+1Ok VKulAl4L1aj0OkYUp9LqwihGLZOrg9T+WqlCq1fG+isZ3RZxYODmYLswOiFu6oSJpV55a1/3 xWZWMhjZmgG4HMgPgv+cbmNnADeOgF8H4NDtacJZ3AXw0MlO0lk8APDX9A78iWUy/RzubDQA +KjjKHAWiwC2ZUzaLRwOyfeB14x6h2E9/zwOay+JHRqcn49D8812zNFw5++C5ZnGNSb4XnBo Nm1tAo+P4NipXtc0D5jX/zfbwVx+CDROFrs0z8HOPCvhYNyuSan+zqU3c6HFFu3kcNhbXc92 sjucbq9ysRAu3mkgnRwD+/N6MSfr4K36qy5+HR7pysIdWXB7lorLAc5R6+DxJSvmeIZ8Hjya KnCqPeF4ro3l5A1w4lSJi2m4kFvi2pUBwIdNtXg28DA9lcD0VALT/9MKAV4GXmDUWkUsow1W b1Yyif99bIxKUQnWLsP3bQuY+GPevxlgHNAMIAen1vPkfSpGwJNJ93/NaFRRGr2c0TaDYPuK c3Dh8zEq+2kpdVHioJDAIIlEEhTyikRMbeDNHDkjE/BjpTomgWHUjOaJD+NwhckY+3NbOHe5 2hIqyxhpOtByU8UpldvCuCM+6WRFkpsgvWhf4liKovUjr9/H0wL0ewr0XfNJ7z3w33r4ZGPh 2Y2d+lRvQ+Evnn37/bv2nk8ZBDI3fdJP5ZI9J7wOrOK2VTKfKBpdKfRsXfx5Sw2W3ZdIf/Ib DB/YPvzho2DR3r/4UztFEfcUuzzyL4BYWjz+6b0bMyaN+ury/Lbll67tPthIVmWLjvlGZO0W eVPRPfc1mjr3WWvPt13W5QvPrGuiAtyn/+xcNrxf2i8c8lr98vrZiNtk/sOZ9oQJcwFza/7l KKOl0WZo25HzhXEuQrXNQL8ZU5on6daG+RQYHidu+piXOEwR2jip2BfXaKX/AvwJ/J6iBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA02Ra0hTYRjHe895d3ZmnTytsjdXSetCTfJG0RtdIcMTREqRRAS58jStTdeW VlZkjm4zTVtRrtRaZWZWOC9Z04jZbZqaiZepC5ItV2Jq0Q2dlY6gbz/+v//zPB8emhQ3Q386 PmE/r0mQK6WUD6yokQYsItar+ZBqx2z8oPYFiQe/DUGcluUh8V3HOQr31nwB2Pn0FMDXTLkQ 258+InCV6TyB79x9TuDz1laAXS1GAld3BOLrJ29CXFVtg7j58VUK5xe4hDi9rZLCt1+OELg9 ywVw9ukWAlc6jwNcMZRP4vu9/RC/6pDgRs9LwRp/7pHRIeQa35VArrk+iTMXnaG40pvHOHdp DuAs9lSKu5FpEHAZus8UN+jqgFz/kxaKyywrAlxp3WHuq3kWZ3b2EVG+23xWxPLK+GReE7wq xifOfdEoUHsiDtbdtwpSgX25HohoxC5GPWcKSD3wocWsBaDu4WHgFdOQrvWn0MuT0Z2RHqG3 NAiQ3lgL9YCmKXYhemNIGs2nsJUk+nVPR4wOkGwxicpymVGezEaivlsl5ChDdh5q6zs1xgyL keNyA+k9EIBy3v4YOyZilyFDj2ksF//tPDl+CXr7k5Atxwm9+wOQrvwKmQVY43/K+J+6Bogi MJ1Xa1UKlTZUHZbAHwjSylXapARF0K5ElRmM/V0mqwRVRQNBVkDQwAoQTUqnMMrGRF7MxMoP pfCaxB2aJCWvtQIJDaXTmO+9GbFiViHfz+/leTWv+WcJWuSfSqgF4rpXaPxKOniiIvWL343n TaLVSt2m4hhT4+uS3p65Z9MeZttTVq3rCmeEfsPPGGk9nufosxwoZiw1uzdKLLnEjKjuH7kb DB/7yzPTrOajwU6bUJU3VDgQUZZyjlo5J1LmiW3VJrc3bU0u6LKta+iw7YjrHNpOLI9ksvvj 00LCfX3XaNySPV0lnR8UBk+0M15XvoCE/nlnjcMZM/XQLXEfUiqiVm/eNS4mLzoqzDVVtv3W 6++7j+wrLgs/8T5wrshlbvpUG1gxNfDDQL3kmH2prLMzfUEYSeJvDTFBS9q5nW9Me+enTJ/Q nY7rA7pCfx9Zq3OtHWm7EPH49pZCKdTGyUNlpEYr/wMbdITmZgMAAA== X-CMS-MailID: 20231206101218epcas5p3bd5005a84adf67a80d394c3e05796bd7 X-Msg-Generator: CA CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20231206101218epcas5p3bd5005a84adf67a80d394c3e05796bd7 References: <20231206100253.13100-1-joshi.k@samsung.com> From: Nitesh Shetty Add support for handling nvme_cmd_copy command on target. For bdev-ns if backing device supports copy offload we call device copy offload (blkdev_copy_offload). In case of absence of device copy offload capability, we use copy emulation (blkdev_copy_emulation) 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. trace event support for nvme_cmd_copy. Reviewed-by: Hannes Reinecke Signed-off-by: Nitesh Shetty Signed-off-by: Anuj Gupta --- drivers/nvme/target/admin-cmd.c | 9 +++- drivers/nvme/target/io-cmd-bdev.c | 71 +++++++++++++++++++++++++++++++ drivers/nvme/target/io-cmd-file.c | 50 ++++++++++++++++++++++ drivers/nvme/target/nvmet.h | 1 + drivers/nvme/target/trace.c | 19 +++++++++ 5 files changed, 148 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c index 39cb570f833d..4e1a6ca09937 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 f11400a908f2..f974858ae5a0 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) @@ -451,6 +463,61 @@ static void nvmet_bdev_execute_write_zeroes(struct nvmet_req *req) } } +static void nvmet_bdev_copy_endio(void *private, int status, + ssize_t copied) +{ + struct nvmet_req *rq = (struct nvmet_req *)private; + u16 nvme_status; + + if (copied == rq->copy_len) + rq->cqe->result.u32 = cpu_to_le32(1); + else + rq->cqe->result.u32 = cpu_to_le32(0); + + nvme_status = errno_to_nvme_status(rq, status); + nvmet_req_complete(rq, nvme_status); +} + +/* + * 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 *rq) +{ + struct nvme_copy_range range; + struct nvme_command *cmd = rq->cmd; + ssize_t ret; + off_t dst, src; + + u16 status; + + status = nvmet_copy_from_sgl(rq, 0, &range, sizeof(range)); + if (status) + goto err_rq_complete; + + dst = le64_to_cpu(cmd->copy.sdlba) << rq->ns->blksize_shift; + src = le64_to_cpu(range.slba) << rq->ns->blksize_shift; + rq->copy_len = ((__force size_t)range.nlb + 1) << rq->ns->blksize_shift; + + if (bdev_max_copy_sectors(rq->ns->bdev)) { + ret = blkdev_copy_offload(rq->ns->bdev, dst, src, rq->copy_len, + nvmet_bdev_copy_endio, + (void *)rq, GFP_KERNEL); + } else { + ret = blkdev_copy_emulation(rq->ns->bdev, dst, + rq->ns->bdev, src, rq->copy_len, + nvmet_bdev_copy_endio, + (void *)rq, GFP_KERNEL); + } + if (ret == -EIOCBQUEUED) + return; + + rq->cqe->result.u32 = cpu_to_le32(0); + status = errno_to_nvme_status(rq, ret); +err_rq_complete: + nvmet_req_complete(rq, status); +} + u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req) { switch (req->cmd->common.opcode) { @@ -469,6 +536,10 @@ 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..0a8337596f0c 100644 --- a/drivers/nvme/target/io-cmd-file.c +++ b/drivers/nvme/target/io-cmd-file.c @@ -322,6 +322,47 @@ 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) + break; + + 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, COPY_FILE_SPLICE); + pos += ret; + if (ret != len) { + 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); + break; + } + } + + 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 +371,12 @@ 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 +423,9 @@ 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 6c8acebe1a1a..b648baeb52cf 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -405,6 +405,7 @@ struct nvmet_req { struct device *p2p_client; u16 error_loc; u64 error_slba; + size_t copy_len; }; #define NVMET_MAX_MPOOL_BVEC 16 diff --git a/drivers/nvme/target/trace.c b/drivers/nvme/target/trace.c index bff454d46255..551fdf029381 100644 --- a/drivers/nvme/target/trace.c +++ b/drivers/nvme/target/trace.c @@ -92,6 +92,23 @@ static const char *nvmet_trace_dsm(struct trace_seq *p, u8 *cdw10) return ret; } +static const char *nvmet_trace_copy(struct trace_seq *p, u8 *cdw10) +{ + const char *ret = trace_seq_buffer_ptr(p); + u64 sdlba = get_unaligned_le64(cdw10); + u8 nr_range = get_unaligned_le16(cdw10 + 8); + u16 control = get_unaligned_le16(cdw10 + 10); + u32 dsmgmt = get_unaligned_le32(cdw10 + 12); + u32 reftag = get_unaligned_le32(cdw10 + 16); + + trace_seq_printf(p, + "sdlba=%llu, nr_range=%u, ctrl=1x%x, dsmgmt=%u, reftag=%u", + sdlba, nr_range, control, dsmgmt, reftag); + trace_seq_putc(p, 0); + + return ret; +} + static const char *nvmet_trace_common(struct trace_seq *p, u8 *cdw10) { const char *ret = trace_seq_buffer_ptr(p); @@ -129,6 +146,8 @@ const char *nvmet_trace_parse_nvm_cmd(struct trace_seq *p, return nvmet_trace_read_write(p, cdw10); case nvme_cmd_dsm: return nvmet_trace_dsm(p, cdw10); + case nvme_cmd_copy: + return nvmet_trace_copy(p, cdw10); default: return nvmet_trace_common(p, cdw10); }