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From: Max Gurtovoy <maxg@mellanox.com>
To: linux-nvme@lists.infradead.org, sagi@grimberg.me,
	linux-rdma@vger.kernel.org, kbusch@kernel.org, hch@lst.de,
	martin.petersen@oracle.com
Cc: axboe@kernel.dk, vladimirk@mellanox.com, shlomin@mellanox.com,
	israelr@mellanox.com, idanb@mellanox.com, maxg@mellanox.com
Subject: [PATCH 15/19] nvmet: Add metadata/T10-PI support
Date: Mon, 24 Feb 2020 18:45:40 +0200
Message-ID: <20200224164544.219438-17-maxg@mellanox.com> (raw)
In-Reply-To: <20200224164544.219438-1-maxg@mellanox.com>

From: Israel Rukshin <israelr@mellanox.com>

Expose the namespace metadata format when PI is enabled. The user needs
to enable the capability per subsystem and per port. The other metadata
properties are taken from the namespace/bdev.

Usage example:
echo 1 > /config/nvmet/subsystems/${NAME}/attr_pi_enable
echo 1 > /config/nvmet/ports/${PORT_NUM}/param_pi_enable

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
---
 drivers/nvme/target/admin-cmd.c   | 19 ++++++++++--
 drivers/nvme/target/configfs.c    | 61 +++++++++++++++++++++++++++++++++++++++
 drivers/nvme/target/fabrics-cmd.c | 11 +++++++
 drivers/nvme/target/nvmet.h       | 26 +++++++++++++++++
 4 files changed, 115 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index c4ad0dd..ebb6873 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -432,9 +432,13 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
 
 	strlcpy(id->subnqn, ctrl->subsys->subsysnqn, sizeof(id->subnqn));
 
-	/* Max command capsule size is sqe + single page of in-capsule data */
+	/*
+	 * Max command capsule size is sqe + single page of in-capsule data.
+	 * Disable inline data for Metadata capable controllers.
+	 */
 	id->ioccsz = cpu_to_le32((sizeof(struct nvme_command) +
-				  req->port->inline_data_size) / 16);
+				  req->port->inline_data_size *
+				  !ctrl->pi_support) / 16);
 	/* Max response capsule size is cqe */
 	id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16);
 
@@ -464,6 +468,7 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
 
 static void nvmet_execute_identify_ns(struct nvmet_req *req)
 {
+	struct nvmet_ctrl *ctrl = req->sq->ctrl;
 	struct nvmet_ns *ns;
 	struct nvme_id_ns *id;
 	u16 status = 0;
@@ -520,6 +525,16 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req)
 
 	id->lbaf[0].ds = ns->blksize_shift;
 
+	if (ctrl->pi_support && nvmet_ns_has_pi(ns)) {
+		id->dpc = NVME_NS_DPC_PI_FIRST | NVME_NS_DPC_PI_LAST |
+			  NVME_NS_DPC_PI_TYPE1 | NVME_NS_DPC_PI_TYPE2 |
+			  NVME_NS_DPC_PI_TYPE3;
+		id->mc = NVME_NS_MC_META_EXT;
+		id->dps = ns->prot_type;
+		id->flbas = NVME_NS_FLBAS_META_EXT;
+		id->lbaf[0].ms = ns->ms;
+	}
+
 	if (ns->readonly)
 		id->nsattr |= (1 << 0);
 	nvmet_put_namespace(ns);
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index 7aa1078..19bf240 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -248,6 +248,36 @@ static ssize_t nvmet_param_inline_data_size_store(struct config_item *item,
 
 CONFIGFS_ATTR(nvmet_, param_inline_data_size);
 
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+static ssize_t nvmet_param_pi_enable_show(struct config_item *item,
+		char *page)
+{
+	struct nvmet_port *port = to_nvmet_port(item);
+
+	return snprintf(page, PAGE_SIZE, "%d\n", port->pi_enable);
+}
+
+static ssize_t nvmet_param_pi_enable_store(struct config_item *item,
+		const char *page, size_t count)
+{
+	struct nvmet_port *port = to_nvmet_port(item);
+	bool val;
+
+	if (strtobool(page, &val))
+		return -EINVAL;
+
+	if (port->enabled) {
+		pr_err("Disable port before setting pi_enable value.\n");
+		return -EACCES;
+	}
+
+	port->pi_enable = val;
+	return count;
+}
+
+CONFIGFS_ATTR(nvmet_, param_pi_enable);
+#endif
+
 static ssize_t nvmet_addr_trtype_show(struct config_item *item,
 		char *page)
 {
@@ -987,6 +1017,31 @@ static ssize_t nvmet_subsys_attr_model_store(struct config_item *item,
 }
 CONFIGFS_ATTR(nvmet_subsys_, attr_model);
 
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+static ssize_t nvmet_subsys_attr_pi_enable_show(struct config_item *item,
+						char *page)
+{
+	return snprintf(page, PAGE_SIZE, "%d\n", to_subsys(item)->pi_support);
+}
+
+static ssize_t nvmet_subsys_attr_pi_enable_store(struct config_item *item,
+						 const char *page, size_t count)
+{
+	struct nvmet_subsys *subsys = to_subsys(item);
+	bool pi_enable;
+
+	if (strtobool(page, &pi_enable))
+		return -EINVAL;
+
+	down_write(&nvmet_config_sem);
+	subsys->pi_support = pi_enable;
+	up_write(&nvmet_config_sem);
+
+	return count;
+}
+CONFIGFS_ATTR(nvmet_subsys_, attr_pi_enable);
+#endif
+
 static struct configfs_attribute *nvmet_subsys_attrs[] = {
 	&nvmet_subsys_attr_attr_allow_any_host,
 	&nvmet_subsys_attr_attr_version,
@@ -994,6 +1049,9 @@ static ssize_t nvmet_subsys_attr_model_store(struct config_item *item,
 	&nvmet_subsys_attr_attr_cntlid_min,
 	&nvmet_subsys_attr_attr_cntlid_max,
 	&nvmet_subsys_attr_attr_model,
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+	&nvmet_subsys_attr_attr_pi_enable,
+#endif
 	NULL,
 };
 
@@ -1289,6 +1347,9 @@ static void nvmet_port_release(struct config_item *item)
 	&nvmet_attr_addr_trsvcid,
 	&nvmet_attr_addr_trtype,
 	&nvmet_attr_param_inline_data_size,
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+	&nvmet_attr_param_pi_enable,
+#endif
 	NULL,
 };
 
diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c
index 52a6f70..799de18 100644
--- a/drivers/nvme/target/fabrics-cmd.c
+++ b/drivers/nvme/target/fabrics-cmd.c
@@ -197,6 +197,17 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req)
 		goto out;
 	}
 
+	if (ctrl->subsys->pi_support && ctrl->port->pi_enable) {
+		if (ctrl->port->pi_capable) {
+			ctrl->pi_support = true;
+			pr_info("controller %d T10-PI enabled\n", ctrl->cntlid);
+		} else {
+			ctrl->pi_support = false;
+			pr_warn("T10-PI is not supported on controller %d\n",
+				ctrl->cntlid);
+		}
+	}
+
 	uuid_copy(&ctrl->hostid, &d->hostid);
 
 	status = nvmet_install_queue(ctrl, req);
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index ff34d7a..ef231fd 100644
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -145,6 +145,8 @@ struct nvmet_port {
 	bool				enabled;
 	int				inline_data_size;
 	const struct nvmet_fabrics_ops	*tr_ops;
+	bool				pi_capable;
+	bool				pi_enable;
 };
 
 static inline struct nvmet_port *to_nvmet_port(struct config_item *item)
@@ -204,6 +206,7 @@ struct nvmet_ctrl {
 	spinlock_t		error_lock;
 	u64			err_counter;
 	struct nvme_error_slot	slots[NVMET_ERROR_LOG_SLOTS];
+	bool			pi_support;
 };
 
 struct nvmet_subsys_model {
@@ -233,6 +236,7 @@ struct nvmet_subsys {
 	u64			ver;
 	u64			serial;
 	char			*subsysnqn;
+	bool			pi_support;
 
 	struct config_group	group;
 
@@ -513,6 +517,28 @@ static inline u32 nvmet_rw_data_len(struct nvmet_req *req)
 			req->ns->blksize_shift;
 }
 
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+static inline u32 nvmet_rw_prot_len(struct nvmet_req *req)
+{
+	return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) * req->ns->ms;
+}
+
+static inline bool nvmet_ns_has_pi(struct nvmet_ns *ns)
+{
+	return ns->prot_type && ns->ms == sizeof(struct t10_pi_tuple);
+}
+#else
+static inline u32 nvmet_rw_prot_len(struct nvmet_req *req)
+{
+	return 0;
+}
+
+static inline bool nvmet_ns_has_pi(struct nvmet_ns *ns)
+{
+	return false;
+}
+#endif /* CONFIG_BLK_DEV_INTEGRITY */
+
 static inline u32 nvmet_dsm_len(struct nvmet_req *req)
 {
 	return (le32_to_cpu(req->cmd->dsm.nr) + 1) *
-- 
1.8.3.1


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  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-24 16:45 [PATCH 00/19 V4] nvme-rdma/nvmet-rdma: " Max Gurtovoy
2020-02-24 16:45 ` [PATCH] nvme-cli/fabrics: Add pi_enable param to connect cmd Max Gurtovoy
2020-02-24 16:45 ` [PATCH 01/19] nvme: Introduce namespace features flag Max Gurtovoy
2020-02-24 16:45 ` [PATCH 02/19] nvme: Add has_pi field to the nvme_req structure Max Gurtovoy
2020-02-24 16:45 ` [PATCH 03/19] nvme: Enforce extended LBA format for fabrics metadata Max Gurtovoy
2020-02-24 16:45 ` [PATCH 04/19] nvme: Introduce max_integrity_segments ctrl attribute Max Gurtovoy
2020-02-24 16:45 ` [PATCH 05/19] nvme-fabrics: Allow user enabling metadata/T10-PI support Max Gurtovoy
2020-02-24 16:45 ` [PATCH 06/19] nvme: Introduce NVME_INLINE_PROT_SG_CNT Max Gurtovoy
2020-02-24 16:45 ` [PATCH 07/19] nvme-rdma: Introduce nvme_rdma_sgl structure Max Gurtovoy
2020-02-24 16:45 ` [PATCH 08/19] nvme-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-02-24 16:45 ` [PATCH 09/19] nvmet: Prepare metadata request Max Gurtovoy
2020-02-24 16:45 ` [PATCH 10/19] nvmet: Add metadata characteristics for a namespace Max Gurtovoy
2020-02-24 16:45 ` [PATCH 11/19] nvmet: Rename nvmet_rw_len to nvmet_rw_data_len Max Gurtovoy
2020-02-24 16:45 ` [PATCH 12/19] nvmet: Rename nvmet_check_data_len to nvmet_check_transfer_len Max Gurtovoy
2020-02-24 16:45 ` [PATCH 13/19] nvme: Add Metadata Capabilities enumerations Max Gurtovoy
2020-02-24 16:45 ` [PATCH 14/19] nvmet: Add mdts setting op for controllers Max Gurtovoy
2020-02-24 16:45 ` Max Gurtovoy [this message]
2020-02-24 16:45 ` [PATCH 16/19] nvmet: Add metadata support for block devices Max Gurtovoy
2020-02-24 16:45 ` [PATCH 17/19] RDMA/rw: Expose maximal page list for a device per 1 MR Max Gurtovoy
2020-02-24 16:45 ` [PATCH 18/19] nvmet-rdma: Implement set_mdts controller op Max Gurtovoy
2020-02-24 16:45 ` [PATCH 19/19] nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-02-24 18:13 ` [PATCH 00/19 V4] nvme-rdma/nvmet-rdma: " James Smart

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