D_OBTAIN_ALIAS(9)                         The Linux VFS                         D_OBTAIN_ALIAS(9)



NAME
       d_obtain_alias - find or allocate a DISCONNECTED dentry for a given inode

SYNOPSIS
       struct dentry * d_obtain_alias(struct inode * inode);

ARGUMENTS
       inode
           inode to allocate the dentry for

DESCRIPTION
       Obtain a dentry for an inode resulting from NFS filehandle conversion or similar open by
       handle operations. The returned dentry may be anonymous, or may have a full name (if the
       inode was already in the cache).

       When called on a directory inode, we must ensure that the inode only ever has 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. To make it easier to use in
       export operations a NULL or IS_ERR inode may be passed in and the error will be propagated
       to the return value, with a NULLinode replaced by ERR_PTR(-ESTALE).

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