D_OBTAIN_ROOT(9)                          The Linux VFS                          D_OBTAIN_ROOT(9)



NAME
       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).

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                          D_OBTAIN_ROOT(9)