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-rw-r--r--drivers/nvme/target/admin-cmd.c26
-rw-r--r--drivers/nvme/target/configfs.c58
-rw-r--r--drivers/nvme/target/core.c21
-rw-r--r--drivers/nvme/target/fabrics-cmd.c7
-rw-r--r--drivers/nvme/target/nvmet.h19
5 files changed, 121 insertions, 10 deletions
diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index 7b6b0395eaca..1db8c0498668 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -341,6 +341,7 @@ static void nvmet_execute_identify_ctrl(struct nvmet_req *req)
{
struct nvmet_ctrl *ctrl = req->sq->ctrl;
struct nvme_id_ctrl *id;
+ u32 cmd_capsule_size;
u16 status = 0;
id = kzalloc(sizeof(*id), GFP_KERNEL);
@@ -433,9 +434,15 @@ 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 */
- id->ioccsz = cpu_to_le32((sizeof(struct nvme_command) +
- req->port->inline_data_size) / 16);
+ /*
+ * Max command capsule size is sqe + in-capsule data size.
+ * Disable in-capsule data for Metadata capable controllers.
+ */
+ cmd_capsule_size = sizeof(struct nvme_command);
+ if (!ctrl->pi_support)
+ cmd_capsule_size += req->port->inline_data_size;
+ id->ioccsz = cpu_to_le32(cmd_capsule_size / 16);
+
/* Max response capsule size is cqe */
id->iorcsz = cpu_to_le32(sizeof(struct nvme_completion) / 16);
@@ -465,6 +472,7 @@ out:
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;
@@ -482,7 +490,7 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req)
}
/* return an all zeroed buffer if we can't find an active namespace */
- ns = nvmet_find_namespace(req->sq->ctrl, req->cmd->identify.nsid);
+ ns = nvmet_find_namespace(ctrl, req->cmd->identify.nsid);
if (!ns)
goto done;
@@ -523,6 +531,16 @@ 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_MC_EXTENDED_LBA;
+ id->dps = ns->pi_type;
+ id->flbas = NVME_NS_FLBAS_META_EXT;
+ id->lbaf[0].ms = cpu_to_le16(ns->metadata_size);
+ }
+
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 17c529260e12..419e0d4ce79b 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)
{
@@ -1010,6 +1040,28 @@ 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;
+
+ subsys->pi_support = pi_enable;
+ 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,
@@ -1017,6 +1069,9 @@ static struct configfs_attribute *nvmet_subsys_attrs[] = {
&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,
};
@@ -1316,6 +1371,9 @@ static struct configfs_attribute *nvmet_port_attrs[] = {
&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/core.c b/drivers/nvme/target/core.c
index a4ed70e4afe3..f9172d38aff5 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -323,12 +323,21 @@ int nvmet_enable_port(struct nvmet_port *port)
if (!try_module_get(ops->owner))
return -EINVAL;
- ret = ops->add_port(port);
- if (ret) {
- module_put(ops->owner);
- return ret;
+ /*
+ * If the user requested PI support and the transport isn't pi capable,
+ * don't enable the port.
+ */
+ if (port->pi_enable && !ops->metadata_support) {
+ pr_err("T10-PI is not supported by transport type %d\n",
+ port->disc_addr.trtype);
+ ret = -EINVAL;
+ goto out_put;
}
+ ret = ops->add_port(port);
+ if (ret)
+ goto out_put;
+
/* If the transport didn't set inline_data_size, then disable it. */
if (port->inline_data_size < 0)
port->inline_data_size = 0;
@@ -336,6 +345,10 @@ int nvmet_enable_port(struct nvmet_port *port)
port->enabled = true;
port->tr_ops = ops;
return 0;
+
+out_put:
+ module_put(ops->owner);
+ return ret;
}
void nvmet_disable_port(struct nvmet_port *port)
diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c
index 52a6f70c9d80..42bd12b8bf00 100644
--- a/drivers/nvme/target/fabrics-cmd.c
+++ b/drivers/nvme/target/fabrics-cmd.c
@@ -197,6 +197,8 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req)
goto out;
}
+ ctrl->pi_support = ctrl->port->pi_enable && ctrl->subsys->pi_support;
+
uuid_copy(&ctrl->hostid, &d->hostid);
status = nvmet_install_queue(ctrl, req);
@@ -205,8 +207,9 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req)
goto out;
}
- pr_info("creating controller %d for subsystem %s for NQN %s.\n",
- ctrl->cntlid, ctrl->subsys->subsysnqn, ctrl->hostnqn);
+ pr_info("creating controller %d for subsystem %s for NQN %s%s.\n",
+ ctrl->cntlid, ctrl->subsys->subsysnqn, ctrl->hostnqn,
+ ctrl->pi_support ? " T10-PI is enabled" : "");
req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid);
out:
diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h
index 29ab0b96bd32..46b5d2b4ca0a 100644
--- a/drivers/nvme/target/nvmet.h
+++ b/drivers/nvme/target/nvmet.h
@@ -145,6 +145,7 @@ struct nvmet_port {
bool enabled;
int inline_data_size;
const struct nvmet_fabrics_ops *tr_ops;
+ bool pi_enable;
};
static inline struct nvmet_port *to_nvmet_port(struct config_item *item)
@@ -204,6 +205,7 @@ 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 +235,7 @@ struct nvmet_subsys {
u64 ver;
u64 serial;
char *subsysnqn;
+ bool pi_support;
struct config_group group;
@@ -284,6 +287,7 @@ struct nvmet_fabrics_ops {
unsigned int type;
unsigned int msdbd;
bool has_keyed_sgls : 1;
+ bool metadata_support : 1;
void (*queue_response)(struct nvmet_req *req);
int (*add_port)(struct nvmet_port *port);
void (*remove_port)(struct nvmet_port *port);
@@ -511,6 +515,14 @@ static inline u32 nvmet_rw_data_len(struct nvmet_req *req)
req->ns->blksize_shift;
}
+static inline u32 nvmet_rw_metadata_len(struct nvmet_req *req)
+{
+ if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY))
+ return 0;
+ return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) *
+ req->ns->metadata_size;
+}
+
static inline u32 nvmet_dsm_len(struct nvmet_req *req)
{
return (le32_to_cpu(req->cmd->dsm.nr) + 1) *
@@ -525,4 +537,11 @@ static inline __le16 to0based(u32 a)
return cpu_to_le16(max(1U, min(1U << 16, a)) - 1);
}
+static inline bool nvmet_ns_has_pi(struct nvmet_ns *ns)
+{
+ if (!IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY))
+ return false;
+ return ns->pi_type && ns->metadata_size == sizeof(struct t10_pi_tuple);
+}
+
#endif /* _NVMET_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-02 16:51:30 +0000