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nvmet: add uuid field to nvme_ns and populate via configfs
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>
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1 changed files with 31 additions and 0 deletions
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@ -305,11 +305,41 @@ static ssize_t nvmet_ns_device_path_store(struct config_item *item,
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CONFIGFS_ATTR(nvmet_ns_, device_path);
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static ssize_t nvmet_ns_device_uuid_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->uuid);
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}
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static ssize_t nvmet_ns_device_uuid_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct nvmet_ns *ns = to_nvmet_ns(item);
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struct nvmet_subsys *subsys = ns->subsys;
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int ret = 0;
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mutex_lock(&subsys->lock);
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if (ns->enabled) {
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ret = -EBUSY;
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goto out_unlock;
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}
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if (uuid_parse(page, &ns->uuid))
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ret = -EINVAL;
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out_unlock:
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mutex_unlock(&subsys->lock);
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return ret ? ret : count;
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}
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static ssize_t nvmet_ns_device_nguid_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%pUb\n", &to_nvmet_ns(item)->nguid);
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}
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CONFIGFS_ATTR(nvmet_ns_, device_uuid);
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static ssize_t nvmet_ns_device_nguid_store(struct config_item *item,
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const char *page, size_t count)
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{
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@ -379,6 +409,7 @@ CONFIGFS_ATTR(nvmet_ns_, enable);
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static struct configfs_attribute *nvmet_ns_attrs[] = {
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&nvmet_ns_attr_device_path,
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&nvmet_ns_attr_device_nguid,
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&nvmet_ns_attr_device_uuid,
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&nvmet_ns_attr_enable,
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NULL,
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};
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