From: Anuj Gupta <anuj20.g@samsung.com>
To: Jens Axboe <axboe@kernel.dk>, Alasdair Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@kernel.org>,
dm-devel@redhat.com, Keith Busch <kbusch@kernel.org>,
Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
James Smart <james.smart@broadcom.com>,
Chaitanya Kulkarni <kch@nvidia.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>
Cc: bvanassche@acm.org, hare@suse.de, ming.lei@redhat.com,
damien.lemoal@opensource.wdc.com, anuj20.g@samsung.com,
joshi.k@samsung.com, nitheshshetty@gmail.com,
gost.dev@samsung.com, Nitesh Shetty <nj.shetty@samsung.com>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH v8 6/9] nvmet: add copy command support for bdev and file ns
Date: Mon, 27 Mar 2023 14:10:54 +0530 [thread overview]
Message-ID: <20230327084103.21601-7-anuj20.g@samsung.com> (raw)
In-Reply-To: <20230327084103.21601-1-anuj20.g@samsung.com>
From: Nitesh Shetty <nj.shetty@samsung.com>
Add support for handling target command on target.
For bdev-ns we call into blkdev_issue_copy, 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.
Signed-off-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
---
drivers/nvme/target/admin-cmd.c | 9 +++--
drivers/nvme/target/io-cmd-bdev.c | 58 +++++++++++++++++++++++++++++++
drivers/nvme/target/io-cmd-file.c | 52 +++++++++++++++++++++++++++
drivers/nvme/target/loop.c | 6 ++++
drivers/nvme/target/nvmet.h | 1 +
5 files changed, 124 insertions(+), 2 deletions(-)
diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index 80099df37314..978786ec6a9e 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 = (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 c2d6cea0236b..0af273097aa4 100644
--- a/drivers/nvme/target/io-cmd-bdev.c
+++ b/drivers/nvme/target/io-cmd-bdev.c
@@ -46,6 +46,19 @@ 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));
+
+ /*Copy limits*/
+ 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(id->mssrl);
+ } else {
+ id->msrc = (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(id->mssrl);
+ }
}
void nvmet_bdev_ns_disable(struct nvmet_ns *ns)
@@ -184,6 +197,19 @@ 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;
+
+ if (comp_len == req->copy_len) {
+ req->cqe->result.u32 = cpu_to_le32(1);
+ nvmet_req_complete(req, errno_to_nvme_status(req, 0));
+ } else {
+ req->cqe->result.u32 = cpu_to_le32(0);
+ nvmet_req_complete(req, blk_to_nvme_status(req, BLK_STS_IOERR));
+ }
+}
+
#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 +476,34 @@ static void nvmet_bdev_execute_write_zeroes(struct nvmet_req *req)
}
}
+/* At present we handle only one range entry */
+static void nvmet_bdev_execute_copy(struct nvmet_req *req)
+{
+ struct nvme_copy_range range;
+ struct nvme_command *cmnd = req->cmd;
+ int ret;
+
+
+ ret = nvmet_copy_from_sgl(req, 0, &range, sizeof(range));
+ if (ret)
+ goto out;
+
+ ret = blkdev_issue_copy(req->ns->bdev,
+ le64_to_cpu(cmnd->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);
+ nvmet_req_complete(req, blk_to_nvme_status(req, BLK_STS_IOERR));
+ }
+
+ return;
+out:
+ nvmet_req_complete(req, errno_to_nvme_status(req, ret));
+}
+
u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req)
{
switch (req->cmd->common.opcode) {
@@ -468,6 +522,10 @@ 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..69f198ecec77 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;
+ loff_t pos;
+ struct nvme_command *cmnd = req->cmd;
+ int ret = 0, len = 0, src, id;
+
+ nr_range = cmnd->copy.nr_range + 1;
+ 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;
+
+ ret = nvmet_copy_from_sgl(req, id * sizeof(range), &range,
+ sizeof(range));
+ if (ret)
+ goto out;
+
+ len = (le16_to_cpu(range.nlb) + 1) << (req->ns->blksize_shift);
+ src = (le64_to_cpu(range.slba) << (req->ns->blksize_shift));
+ ret = vfs_copy_file_range(req->ns->file, src, req->ns->file,
+ pos, len, 0);
+out:
+ if (ret != len) {
+ pos += ret;
+ req->cqe->result.u32 = cpu_to_le32(id);
+ nvmet_req_complete(req, ret < 0 ?
+ errno_to_nvme_status(req, ret) :
+ errno_to_nvme_status(req, -EIO));
+ return;
+
+ } else
+ pos += len;
+ }
+
+ nvmet_req_complete(req, 0);
+
+}
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/loop.c b/drivers/nvme/target/loop.c
index f2d24b2d992f..d18ed8067a15 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -146,6 +146,12 @@ static blk_status_t nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx,
return ret;
nvme_start_request(req);
+ if (unlikely((req->cmd_flags & REQ_COPY) &&
+ (req_op(req) == REQ_OP_READ))) {
+ blk_mq_set_request_complete(req);
+ blk_mq_end_request(req, BLK_STS_OK);
+ return BLK_STS_OK;
+ }
iod->cmd.common.flags |= NVME_CMD_SGL_METABUF;
iod->req.port = queue->ctrl->port;
if (!nvmet_req_init(&iod->req, &queue->nvme_cq,
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index 89bedfcd974c..69ed4c8469e5 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
--
2.35.1.500.gb896f729e2
next prev parent reply other threads:[~2023-03-29 8:17 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20230327084154epcas5p2a1d8ee728610929fbba8c7757ad3193e@epcas5p2.samsung.com>
2023-03-27 8:40 ` [PATCH v8 0/9] Implement copy offload support Anuj Gupta
[not found] ` <CGME20230327084216epcas5p3945507ecd94688c40c29195127ddc54d@epcas5p3.samsung.com>
2023-03-27 8:40 ` [PATCH v8 1/9] block: Introduce queue limits for copy-offload support Anuj Gupta
2023-03-29 8:40 ` Damien Le Moal
2023-03-29 10:41 ` Nitesh Shetty
2023-03-29 12:24 ` Damien Le Moal
2023-03-29 12:34 ` Nitesh Shetty
[not found] ` <CGME20230327084226epcas5p28e667b25cbb5e4b0e884aa2ca89cbfff@epcas5p2.samsung.com>
2023-03-27 8:40 ` [PATCH v8 2/9] block: Add copy offload support infrastructure Anuj Gupta
2023-03-29 8:56 ` Damien Le Moal
[not found] ` <CGME20230327084235epcas5p495559f907ce39184da72a412c5691e43@epcas5p4.samsung.com>
2023-03-27 8:40 ` [PATCH v8 3/9] block: add emulation for copy Anuj Gupta
[not found] ` <CGME20230327084244epcas5p1b0ede867e558ff6faf258de3656a8aa4@epcas5p1.samsung.com>
2023-03-27 8:40 ` [PATCH v8 4/9] fs, block: copy_file_range for def_blk_ops for direct block device Anuj Gupta
2023-03-29 12:14 ` Christian Brauner
2023-03-29 12:42 ` Nitesh Shetty
2023-03-30 5:48 ` Christian Brauner
2023-03-30 15:21 ` Nitesh Shetty
2023-03-29 14:07 ` kernel test robot
2023-03-29 15:30 ` kernel test robot
[not found] ` <CGME20230327084254epcas5p4c5f324c1501062f743895273c302c0a4@epcas5p4.samsung.com>
2023-03-27 8:40 ` [PATCH v8 5/9] nvme: add copy offload support Anuj Gupta
[not found] ` <CGME20230327084303epcas5p22fdd3af683d3eb1b3f503bcf045f578a@epcas5p2.samsung.com>
2023-03-27 8:40 ` Anuj Gupta [this message]
2023-03-29 13:56 ` [PATCH v8 6/9] nvmet: add copy command support for bdev and file ns kernel test robot
2023-03-29 18:36 ` kernel test robot
[not found] ` <CGME20230327084312epcas5p377810b172aa6048519591518f8c308d0@epcas5p3.samsung.com>
2023-03-27 8:40 ` [PATCH v8 7/9] dm: Add support for copy offload Anuj Gupta
2023-03-29 8:59 ` Damien Le Moal
2023-03-29 12:12 ` Nitesh Shetty
[not found] ` <CGME20230327084322epcas5p12f01e676e47d3c8ba880f3f5d58999b4@epcas5p1.samsung.com>
2023-03-27 8:40 ` [PATCH v8 8/9] dm: Enable copy offload for dm-linear target Anuj Gupta
[not found] ` <CGME20230327084331epcas5p2510ed79d04fe3432c2ec84ce528745c6@epcas5p2.samsung.com>
2023-03-27 8:40 ` [PATCH v8 9/9] null_blk: add support for copy offload Anuj Gupta
2023-03-29 9:04 ` Damien Le Moal
2023-03-29 12:22 ` Nitesh Shetty
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