diff options
Diffstat (limited to 'fs/btrfs/sysfs.c')
| -rw-r--r-- | fs/btrfs/sysfs.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 21ab8b9b62ce..e6b51fb3ddc1 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -425,6 +425,13 @@ static ssize_t acl_show(struct kobject *kobj, struct kobj_attribute *a, char *bu } BTRFS_ATTR(static_feature, acl, acl_show); +static ssize_t temp_fsid_supported_show(struct kobject *kobj, + struct kobj_attribute *a, char *buf) +{ + return sysfs_emit(buf, "0\n"); +} +BTRFS_ATTR(static_feature, temp_fsid, temp_fsid_supported_show); + /* * Features which only depend on kernel version. * @@ -438,6 +445,7 @@ static struct attribute *btrfs_supported_static_feature_attrs[] = { BTRFS_ATTR_PTR(static_feature, send_stream_version), BTRFS_ATTR_PTR(static_feature, supported_rescue_options), BTRFS_ATTR_PTR(static_feature, supported_sectorsizes), + BTRFS_ATTR_PTR(static_feature, temp_fsid), NULL }; @@ -1205,6 +1213,15 @@ static ssize_t btrfs_generation_show(struct kobject *kobj, } BTRFS_ATTR(, generation, btrfs_generation_show); +static ssize_t btrfs_temp_fsid_show(struct kobject *kobj, + struct kobj_attribute *a, char *buf) +{ + struct btrfs_fs_info *fs_info = to_fs_info(kobj); + + return sysfs_emit(buf, "%d\n", fs_info->fs_devices->temp_fsid); +} +BTRFS_ATTR(, temp_fsid, btrfs_temp_fsid_show); + static const char * const btrfs_read_policy_name[] = { "pid" }; static ssize_t btrfs_read_policy_show(struct kobject *kobj, @@ -1307,6 +1324,7 @@ static const struct attribute *btrfs_attrs[] = { BTRFS_ATTR_PTR(, read_policy), BTRFS_ATTR_PTR(, bg_reclaim_threshold), BTRFS_ATTR_PTR(, commit_stats), + BTRFS_ATTR_PTR(, temp_fsid), NULL, }; |