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authorJohannes Thumshirn <jthumshirn@suse.de>2017-06-07 11:45:33 +0200
committerChristoph Hellwig <hch@lst.de>2017-06-15 14:30:22 +0200
commit430c7bef173e23c61981ca7d0279e3d3c7549b1a (patch)
tree480939c78082af63f5d7977b069814fbc45b1461 /drivers/nvme
parent637dc0f38afdd2fdb6e46a913b7f35c17f0c6ae0 (diff)
downloadlinux-430c7bef173e23c61981ca7d0279e3d3c7549b1a.tar.bz2
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>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/target/configfs.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index be8c800078e2..83bfe28fe7da 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -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,
};