diff options
Diffstat (limited to 'fs/overlayfs/super.c')
| -rw-r--r-- | fs/overlayfs/super.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index a344b427473..c9db954b136 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -385,9 +385,29 @@ static int ovl_remount_fs(struct super_block *sb, int *flagsp, char *data) return mnt_want_write(ufs->upper_mnt); } +/** + * ovl_statfs + * @sb: The overlayfs super block + * @buf: The struct kstatfs to fill in with stats + * + * Get the filesystem statistics. As writes always target the upper layer + * filesystem pass the statfs to the same filesystem. + */ +static int ovl_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + struct dentry *root_dentry = dentry->d_sb->s_root; + struct path path; + ovl_path_upper(root_dentry, &path); + + if (!path.dentry->d_sb->s_op->statfs) + return -ENOSYS; + return path.dentry->d_sb->s_op->statfs(path.dentry, buf); +} + static const struct super_operations ovl_super_operations = { .put_super = ovl_put_super, .remount_fs = ovl_remount_fs, + .statfs = ovl_statfs, }; struct ovl_config { |