vfs_unlink (9)

int vfs_unlink(struct inode * dir, struct dentry * dentry, struct inode ** delegated_inode);

dir

parent directory

dentry

victim

delegated_inode

returns victim inode, if the inode is delegated.

The caller must hold dir->i_mutex.

If vfs_unlink discovers a delegation, it will return -EWOULDBLOCK and return a reference to the inode in delegated_inode. The caller should then break the delegation on that inode and retry. Because breaking a delegation may take a long time, the caller should drop dir->i_mutex before doing so.

Alternatively, a caller may pass NULL for delegated_inode. This may be appropriate for callers that expect the underlying filesystem not to be NFS exported.