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NVMe: Export namespace attributes to sysfs

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Exposes the NGUID, EUI-64, and NSID to sysfs entries under the disk's
kobject.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2015-12-22 10:10:45 -07:00 committed by Jens Axboe
parent a0a3408ee6
commit 2b9b6e86bc
2 changed files with 70 additions and 2 deletions
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69
drivers/nvme/host/core.c
View File

@ -574,6 +574,11 @@ static int nvme_revalidate_disk(struct gendisk *disk)
ns->type = NVME_NS_LIGHTNVM;
}
if (ns->ctrl->vs >= NVME_VS(1, 1))
memcpy(ns->eui, id->eui64, sizeof(ns->eui));
if (ns->ctrl->vs >= NVME_VS(1, 2))
memcpy(ns->uuid, id->nguid, sizeof(ns->uuid));
old_ms = ns->ms;
lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK;
ns->lba_shift = id->lbaf[lbaf].ds;
@ -964,6 +969,59 @@ static ssize_t nvme_sysfs_reset(struct device *dev,
}
static DEVICE_ATTR(reset_controller, S_IWUSR, NULL, nvme_sysfs_reset);
static ssize_t uuid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct nvme_ns *ns = dev_to_disk(dev)->private_data;
return sprintf(buf, "%pU\n", ns->uuid);
}
static DEVICE_ATTR(uuid, S_IRUGO, uuid_show, NULL);
static ssize_t eui_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct nvme_ns *ns = dev_to_disk(dev)->private_data;
return sprintf(buf, "%8phd\n", ns->eui);
}
static DEVICE_ATTR(eui, S_IRUGO, eui_show, NULL);
static ssize_t nsid_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct nvme_ns *ns = dev_to_disk(dev)->private_data;
return sprintf(buf, "%d\n", ns->ns_id);
}
static DEVICE_ATTR(nsid, S_IRUGO, nsid_show, NULL);
static struct attribute *nvme_ns_attrs[] = {
&dev_attr_uuid.attr,
&dev_attr_eui.attr,
&dev_attr_nsid.attr,
NULL,
};
static umode_t nvme_attrs_are_visible(struct kobject *kobj,
struct attribute *a, int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct nvme_ns *ns = dev_to_disk(dev)->private_data;
if (a == &dev_attr_uuid.attr) {
if (!memchr_inv(ns->uuid, 0, sizeof(ns->uuid)))
return 0;
}
if (a == &dev_attr_eui.attr) {
if (!memchr_inv(ns->eui, 0, sizeof(ns->eui)))
return 0;
}
return a->mode;
}
static const struct attribute_group nvme_ns_attr_group = {
.attrs = nvme_ns_attrs,
.is_visible = nvme_attrs_are_visible,
};
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);
@ -1038,9 +1096,14 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
list_add_tail(&ns->list, &ctrl->namespaces);
kref_get(&ctrl->kref);
if (ns->type != NVME_NS_LIGHTNVM)
add_disk(ns->disk);
if (ns->type == NVME_NS_LIGHTNVM)
return;
add_disk(ns->disk);
if (sysfs_create_group(&disk_to_dev(ns->disk)->kobj,
&nvme_ns_attr_group))
pr_warn("%s: failed to create sysfs group for identification\n",
ns->disk->disk_name);
return;
out_free_disk:
kfree(disk);
@ -1060,6 +1123,8 @@ static void nvme_ns_remove(struct nvme_ns *ns)
if (ns->disk->flags & GENHD_FL_UP) {
if (blk_get_integrity(ns->disk))
blk_integrity_unregister(ns->disk);
sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
&nvme_ns_attr_group);
del_gendisk(ns->disk);
}
if (kill || !blk_queue_dying(ns->queue)) {

3
drivers/nvme/host/nvme.h
View File

@ -102,6 +102,9 @@ struct nvme_ns {
struct gendisk *disk;
struct kref kref;
u8 eui[8];
u8 uuid[16];
unsigned ns_id;
int lba_shift;
u16 ms;