Messages in this thread Patch in this message | | | From | Johannes Thumshirn <> | Subject | [PATCH v6 06/10] nvmet: add uuid field to nvme_ns and populate via configfs | Date | Wed, 7 Jun 2017 11:45:33 +0200 |
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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> --- drivers/nvme/target/configfs.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+)
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 @@ static ssize_t nvmet_ns_device_path_store(struct config_item *item, 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, }; -- 2.12.3
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