diff options
Diffstat (limited to 'drivers/nvme/host/sysfs.c')
| -rw-r--r-- | drivers/nvme/host/sysfs.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/nvme/host/sysfs.c b/drivers/nvme/host/sysfs.c index 6d31226f7a4f..a5bc3bb483d5 100644 --- a/drivers/nvme/host/sysfs.c +++ b/drivers/nvme/host/sysfs.c @@ -306,13 +306,41 @@ static const struct attribute_group nvme_ns_attr_group = { }; #ifdef CONFIG_NVME_MULTIPATH +/* + * NOTE: The dummy attribute does not appear in sysfs. It exists solely to allow + * control over the visibility of the multipath sysfs node. Without at least one + * attribute defined in nvme_ns_mpath_attrs[], the sysfs implementation does not + * invoke the multipath_sysfs_group_visible() method. As a result, we would not + * be able to control the visibility of the multipath sysfs node. + */ +static struct attribute dummy_attr = { + .name = "dummy", +}; + static struct attribute *nvme_ns_mpath_attrs[] = { + &dummy_attr, NULL, }; +static bool multipath_sysfs_group_visible(struct kobject *kobj) +{ + struct device *dev = container_of(kobj, struct device, kobj); + + return nvme_disk_is_ns_head(dev_to_disk(dev)); +} + +static bool multipath_sysfs_attr_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + return false; +} + +DEFINE_SYSFS_GROUP_VISIBLE(multipath_sysfs) + const struct attribute_group nvme_ns_mpath_attr_group = { .name = "multipath", .attrs = nvme_ns_mpath_attrs, + .is_visible = SYSFS_GROUP_VISIBLE(multipath_sysfs), }; #endif |