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nvmet: add uuid field to nvme_ns and populate via configfs

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Add the UUID field from the NVMe Namespace Identification Descriptor
to the nvmet_ns structure and allow it's population via configfs.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Johannes Thumshirn 2017-06-07 11:45:33 +02:00 committed by Christoph Hellwig
parent 637dc0f38a
commit 430c7bef17
1 changed files with 31 additions and 0 deletions
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31
drivers/nvme/target/configfs.c
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@ -305,11 +305,41 @@ out_unlock:
CONFIGFS_ATTR(nvmet_ns_, device_path);
static ssize_t nvmet_ns_device_uuid_show(struct config_item *item, char *page)
{
return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->uuid);
}
static ssize_t nvmet_ns_device_uuid_store(struct config_item *item,
const char *page, size_t count)
{
struct nvmet_ns *ns = to_nvmet_ns(item);
struct nvmet_subsys *subsys = ns->subsys;
int ret = 0;
mutex_lock(&subsys->lock);
if (ns->enabled) {
ret = -EBUSY;
goto out_unlock;
}
if (uuid_parse(page, &ns->uuid))
ret = -EINVAL;
out_unlock:
mutex_unlock(&subsys->lock);
return ret ? ret : count;
}
static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page)
{
return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->nguid);
}
CONFIGFS_ATTR(nvmet_ns_, device_uuid);
static ssize_t nvmet_ns_device_nguid_store(struct config_item *item,
const char *page, size_t count)
{
@ -379,6 +409,7 @@ CONFIGFS_ATTR(nvmet_ns_, enable);
static struct configfs_attribute *nvmet_ns_attrs[] = {
&nvmet_ns_attr_device_path,
&nvmet_ns_attr_device_nguid,
&nvmet_ns_attr_device_uuid,
&nvmet_ns_attr_enable,
NULL,
};