The inode representing the file. This is a unique number assigned by the file system when vnodes are first created.
flags
Additional locking flags to pass through to vget(9).
vpp
Return parameter for the vnode.
This is an optional file system entry-point for file systems mainly intended for NFS server use, but many file systems use it internally in VOP_LOOKUP(9) and similar.
If the file system does not support this call, then it should return EOPNOTSUPP.
Please see ffs_vget in sys/ufs/ffs/ffs_vfsops.c for the canonical example.
