* [PATCH] nvme: Add sysfs parameter to show subsystem nqn
@ 2015-12-21 8:26 Ian Bakshan
2015-12-21 8:31 ` Ian Bakshan
0 siblings, 1 reply; 2+ messages in thread
From: Ian Bakshan @ 2015-12-21 8:26 UTC (permalink / raw)
Added 'subsysnqn' parameter to /sys/class/nvme-fabrics/ctl/nvmeX/ that
shows the subsystem nqn of the configured device.
Signed-off-by: Ian Bakshan <ianb at mellanox.com>
---
drivers/nvme/host/core.c | 24 ++++++++++++++++++++++++
drivers/nvme/host/nvme.h | 1 +
drivers/nvme/host/rdma.c | 10 +++++++++-
drivers/nvme/target/loop.c | 8 ++++++++
4 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 49c721c..663ad56 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1011,6 +1011,20 @@ static ssize_t nvme_sysfs_delete(struct device *dev,
}
static DEVICE_ATTR(delete_controller, S_IWUSR, NULL, nvme_sysfs_delete);
+static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
+ ssize_t count = 0;
+
+ if (ctrl->ops->get_subsysnqn)
+ count = sprintf(buf, "%s\n", ctrl->ops->get_subsysnqn(ctrl));
+
+ return count;
+}
+static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL);
+
static int ns_cmp(void *priv, struct list_head *a, struct list_head *b)
{
struct nvme_ns *nsa = container_of(a, struct nvme_ns, list);
@@ -1246,6 +1260,8 @@ static void nvme_release_instance(struct nvme_ctrl *ctrl)
void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
{
+ if (ctrl->ops->get_subsysnqn)
+ device_remove_file(ctrl->device, &dev_attr_subsysnqn);
device_remove_file(ctrl->device, &dev_attr_reset_controller);
if (ctrl->ops->delete_ctrl)
device_remove_file(ctrl->device, &dev_attr_delete_controller);
@@ -1316,12 +1332,20 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
goto out_remove_reset_attr;
}
+ if (ctrl->ops->get_subsysnqn) {
+ ret = device_create_file(ctrl->device, &dev_attr_subsysnqn);
+ if (ret)
+ goto out_remove_delete_attr;
+ }
+
spin_lock(&dev_list_lock);
list_add_tail(&ctrl->node, &nvme_ctrl_list);
spin_unlock(&dev_list_lock);
return 0;
+out_remove_delete_attr:
+ device_remove_file(ctrl->device, &dev_attr_delete_controller);
out_remove_reset_attr:
device_remove_file(ctrl->device, &dev_attr_reset_controller);
out_put_device:
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 16edf85..8bc6660 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -103,6 +103,7 @@ struct nvme_ctrl_ops {
int (*reset_ctrl)(struct nvme_ctrl *ctrl);
void (*free_ctrl)(struct nvme_ctrl *ctrl);
int (*delete_ctrl)(struct nvme_ctrl *ctrl);
+ const char *(*get_subsysnqn)(struct nvme_ctrl *ctrl);
};
static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl)
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 0ce063d..cacecd3 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1443,6 +1443,13 @@ static int nvme_rdma_del_ctrl(struct nvme_ctrl *nctrl)
return 0;
}
+static const char *nvme_rdma_get_subsysnqn(struct nvme_ctrl *nctrl)
+{
+ struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
+
+ return ctrl->subsysnqn;
+}
+
static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = {
.module = THIS_MODULE,
.reg_read32 = nvmf_reg_read32,
@@ -1451,7 +1458,8 @@ static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = {
.io_incapable = nvme_rdma_io_incapable,
.reset_ctrl = nvme_rdma_reset_ctrl,
.free_ctrl = nvme_rdma_free_ctrl,
- .delete_ctrl = nvme_rdma_del_ctrl
+ .delete_ctrl = nvme_rdma_del_ctrl,
+ .get_subsysnqn = nvme_rdma_get_subsysnqn,
};
static int nvme_rdma_create_ctrl(struct device *dev,
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index a680db6..2feeee2 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -353,6 +353,13 @@ static int nvme_loop_del_ctrl(struct nvme_ctrl *nctrl)
return 0;
}
+static const char *nvme_loop_get_subsysnqn(struct nvme_ctrl *nctrl)
+{
+ struct nvme_loop_ctrl *ctrl = to_loop_ctrl(nctrl);
+
+ return ctrl->subsysnqn;
+}
+
static const struct nvme_ctrl_ops nvme_loop_ctrl_ops = {
.module = THIS_MODULE,
.reg_read32 = nvmf_reg_read32,
@@ -362,6 +369,7 @@ static const struct nvme_ctrl_ops nvme_loop_ctrl_ops = {
.reset_ctrl = nvme_loop_reset_ctrl,
.free_ctrl = nvme_loop_free_ctrl,
.delete_ctrl = nvme_loop_del_ctrl,
+ .get_subsysnqn = nvme_loop_get_subsysnqn,
};
static int nvme_loop_create_ctrl(struct device *dev,
--
1.8.4.3
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH] nvme: Add sysfs parameter to show subsystem nqn
2015-12-21 8:26 [PATCH] nvme: Add sysfs parameter to show subsystem nqn Ian Bakshan
@ 2015-12-21 8:31 ` Ian Bakshan
0 siblings, 0 replies; 2+ messages in thread
From: Ian Bakshan @ 2015-12-21 8:31 UTC (permalink / raw)
Please disregard, I sent it by mistake
On 21/12/2015 10:26, Ian Bakshan wrote:
> Added 'subsysnqn' parameter to /sys/class/nvme-fabrics/ctl/nvmeX/ that
> shows the subsystem nqn of the configured device.
>
> Signed-off-by: Ian Bakshan <ianb at mellanox.com>
> ---
> drivers/nvme/host/core.c | 24 ++++++++++++++++++++++++
> drivers/nvme/host/nvme.h | 1 +
> drivers/nvme/host/rdma.c | 10 +++++++++-
> drivers/nvme/target/loop.c | 8 ++++++++
> 4 files changed, 42 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index 49c721c..663ad56 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -1011,6 +1011,20 @@ static ssize_t nvme_sysfs_delete(struct device *dev,
> }
> static DEVICE_ATTR(delete_controller, S_IWUSR, NULL, nvme_sysfs_delete);
>
> +static ssize_t nvme_sysfs_show_subsysnqn(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
> + ssize_t count = 0;
> +
> + if (ctrl->ops->get_subsysnqn)
> + count = sprintf(buf, "%s\n", ctrl->ops->get_subsysnqn(ctrl));
> +
> + return count;
> +}
> +static DEVICE_ATTR(subsysnqn, S_IRUGO, nvme_sysfs_show_subsysnqn, NULL);
> +
> static int ns_cmp(void *priv, struct list_head *a, struct list_head *b)
> {
> struct nvme_ns *nsa = container_of(a, struct nvme_ns, list);
> @@ -1246,6 +1260,8 @@ static void nvme_release_instance(struct nvme_ctrl *ctrl)
>
> void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
> {
> + if (ctrl->ops->get_subsysnqn)
> + device_remove_file(ctrl->device, &dev_attr_subsysnqn);
> device_remove_file(ctrl->device, &dev_attr_reset_controller);
> if (ctrl->ops->delete_ctrl)
> device_remove_file(ctrl->device, &dev_attr_delete_controller);
> @@ -1316,12 +1332,20 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev,
> goto out_remove_reset_attr;
> }
>
> + if (ctrl->ops->get_subsysnqn) {
> + ret = device_create_file(ctrl->device, &dev_attr_subsysnqn);
> + if (ret)
> + goto out_remove_delete_attr;
> + }
> +
> spin_lock(&dev_list_lock);
> list_add_tail(&ctrl->node, &nvme_ctrl_list);
> spin_unlock(&dev_list_lock);
>
> return 0;
>
> +out_remove_delete_attr:
> + device_remove_file(ctrl->device, &dev_attr_delete_controller);
> out_remove_reset_attr:
> device_remove_file(ctrl->device, &dev_attr_reset_controller);
> out_put_device:
> diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
> index 16edf85..8bc6660 100644
> --- a/drivers/nvme/host/nvme.h
> +++ b/drivers/nvme/host/nvme.h
> @@ -103,6 +103,7 @@ struct nvme_ctrl_ops {
> int (*reset_ctrl)(struct nvme_ctrl *ctrl);
> void (*free_ctrl)(struct nvme_ctrl *ctrl);
> int (*delete_ctrl)(struct nvme_ctrl *ctrl);
> + const char *(*get_subsysnqn)(struct nvme_ctrl *ctrl);
> };
>
> static inline bool nvme_ctrl_ready(struct nvme_ctrl *ctrl)
> diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
> index 0ce063d..cacecd3 100644
> --- a/drivers/nvme/host/rdma.c
> +++ b/drivers/nvme/host/rdma.c
> @@ -1443,6 +1443,13 @@ static int nvme_rdma_del_ctrl(struct nvme_ctrl *nctrl)
> return 0;
> }
>
> +static const char *nvme_rdma_get_subsysnqn(struct nvme_ctrl *nctrl)
> +{
> + struct nvme_rdma_ctrl *ctrl = to_rdma_ctrl(nctrl);
> +
> + return ctrl->subsysnqn;
> +}
> +
> static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = {
> .module = THIS_MODULE,
> .reg_read32 = nvmf_reg_read32,
> @@ -1451,7 +1458,8 @@ static const struct nvme_ctrl_ops nvme_rdma_ctrl_ops = {
> .io_incapable = nvme_rdma_io_incapable,
> .reset_ctrl = nvme_rdma_reset_ctrl,
> .free_ctrl = nvme_rdma_free_ctrl,
> - .delete_ctrl = nvme_rdma_del_ctrl
> + .delete_ctrl = nvme_rdma_del_ctrl,
> + .get_subsysnqn = nvme_rdma_get_subsysnqn,
> };
>
> static int nvme_rdma_create_ctrl(struct device *dev,
> diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
> index a680db6..2feeee2 100644
> --- a/drivers/nvme/target/loop.c
> +++ b/drivers/nvme/target/loop.c
> @@ -353,6 +353,13 @@ static int nvme_loop_del_ctrl(struct nvme_ctrl *nctrl)
> return 0;
> }
>
> +static const char *nvme_loop_get_subsysnqn(struct nvme_ctrl *nctrl)
> +{
> + struct nvme_loop_ctrl *ctrl = to_loop_ctrl(nctrl);
> +
> + return ctrl->subsysnqn;
> +}
> +
> static const struct nvme_ctrl_ops nvme_loop_ctrl_ops = {
> .module = THIS_MODULE,
> .reg_read32 = nvmf_reg_read32,
> @@ -362,6 +369,7 @@ static const struct nvme_ctrl_ops nvme_loop_ctrl_ops = {
> .reset_ctrl = nvme_loop_reset_ctrl,
> .free_ctrl = nvme_loop_free_ctrl,
> .delete_ctrl = nvme_loop_del_ctrl,
> + .get_subsysnqn = nvme_loop_get_subsysnqn,
> };
>
> static int nvme_loop_create_ctrl(struct device *dev,
^ permalink raw reply [flat|nested] 2+ messages in thread
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2015-12-21 8:26 [PATCH] nvme: Add sysfs parameter to show subsystem nqn Ian Bakshan
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