diff options
Diffstat (limited to 'fs/overlayfs/util.c')
| -rw-r--r-- | fs/overlayfs/util.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index cc793c8f001f..130aba055ffe 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -1551,3 +1551,13 @@ void ovl_copyattr(struct inode *inode) i_size_write(inode, i_size_read(realinode)); spin_unlock(&inode->i_lock); } + +int ovl_parent_lock(struct dentry *parent, struct dentry *child) +{ + inode_lock_nested(parent->d_inode, I_MUTEX_PARENT); + if (!child || child->d_parent == parent) + return 0; + + inode_unlock(parent->d_inode); + return -EINVAL; +} |