d_obtain_root (9) Linux Manual Page
d_obtain_root – find or allocate a dentry for a given inode
Synopsis
struct dentry *d_obtain_root(struct inode *inode);Arguments
inode
-
- inode to allocate the dentry for
Description
Obtain an IS_ROOT dentry for the root of a filesystem.
We must ensure that directory inodes only ever have one dentry. If a dentry is found, that is returned instead of allocating a new one.
On successful return, the reference to the inode has been transferred to the dentry. In case of an error the reference on the inode is released. A NULL or IS_ERR inode may be passed in and will be the error will be propagate to the return value, with a NULLinode replaced by ERR_PTR(-ESTALE).