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authorMing Lin <ming.l@ssi.samsung.com>2016-02-27 00:24:19 +0300
committerJens Axboe <axboe@fb.com>2016-02-29 22:31:27 +0300
commit931e1c2204c6d00c11c5c1e2e1c20b5ca41f292d (patch)
tree125642bcc0365e00100cfe62c8bed65f32920e25 /drivers/nvme
parent1cb3cce5eb9de335330c8a147e47e3359a51a8b5 (diff)
downloadlinux-931e1c2204c6d00c11c5c1e2e1c20b5ca41f292d.tar.xz
nvme: expose cntlid in sysfs
For NVMe over Fabrics, the cntlid will be used by systemd/udev to create link to the device, for example, /dev/disk/by-path/<fabrics-info>-<cntlid>-<namespace> -> /dev/nvme0n1 Signed-off-by: Ming Lin <ming.l@ssi.samsung.com> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/core.c20
-rw-r--r--drivers/nvme/host/nvme.h1
2 files changed, 17 insertions, 4 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 66fd3d9e4d47..f08dccee8143 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -912,6 +912,7 @@ int nvme_init_identify(struct nvme_ctrl *ctrl)
ctrl->oncs = le16_to_cpup(&id->oncs);
atomic_set(&ctrl->abort_limit, id->acl + 1);
ctrl->vwc = id->vwc;
+ ctrl->cntlid = le16_to_cpup(&id->cntlid);
memcpy(ctrl->serial, id->sn, sizeof(id->sn));
memcpy(ctrl->model, id->mn, sizeof(id->mn));
memcpy(ctrl->firmware_rev, id->fr, sizeof(id->fr));
@@ -1099,7 +1100,7 @@ static const struct attribute_group nvme_ns_attr_group = {
.is_visible = nvme_attrs_are_visible,
};
-#define nvme_show_function(field) \
+#define nvme_show_str_function(field) \
static ssize_t field##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
@@ -1108,15 +1109,26 @@ static ssize_t field##_show(struct device *dev, \
} \
static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL);
-nvme_show_function(model);
-nvme_show_function(serial);
-nvme_show_function(firmware_rev);
+#define nvme_show_int_function(field) \
+static ssize_t field##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct nvme_ctrl *ctrl = dev_get_drvdata(dev); \
+ return sprintf(buf, "%d\n", ctrl->field); \
+} \
+static DEVICE_ATTR(field, S_IRUGO, field##_show, NULL);
+
+nvme_show_str_function(model);
+nvme_show_str_function(serial);
+nvme_show_str_function(firmware_rev);
+nvme_show_int_function(cntlid);
static struct attribute *nvme_dev_attrs[] = {
&dev_attr_reset_controller.attr,
&dev_attr_model.attr,
&dev_attr_serial.attr,
&dev_attr_firmware_rev.attr,
+ &dev_attr_cntlid.attr,
NULL
};
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 2ac7539fdd17..9b71fa8c75e4 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -77,6 +77,7 @@ struct nvme_ctrl {
char serial[20];
char model[40];
char firmware_rev[8];
+ int cntlid;
u32 ctrl_config;