D_OBTAIN_ALIAS(9) The Linux VFS D_OBTAIN_ALIAS(9)NAMEd_obtain_alias - find or allocate a 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 will be the error will be propagate
to the return value, with a NULL inode replaced by ERR_PTR(-ESTALE).
COPYRIGHTKernel Hackers Manual 2.6. November 2013 D_OBTAIN_ALIAS(9)
