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| author | Johannes Thumshirn <jthumshirn@suse.de> | 2017-06-07 11:45:33 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-06-15 14:30:22 +0200 |
| commit | 430c7bef173e23c61981ca7d0279e3d3c7549b1a (patch) | |
| tree | 480939c78082af63f5d7977b069814fbc45b1461 /drivers/nvme | |
| parent | 637dc0f38afdd2fdb6e46a913b7f35c17f0c6ae0 (diff) | |
| download | linux-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.c | 31 |
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, }; |