vfsops Declarationstruct vfsops { ... }; TopicsInstance Propertiesvfs_fhtovpvfs_getattrvfs_initvfs_mountvfs_quotactlvfs_rootvfs_setattrvfs_startvfs_syncvfs_sysctlvfs_unmountvfs_vgetvfs_vptofhvfs_ioctlvfs_reserved1vfs_reserved2vfs_reserved3vfs_reserved4vfs_reserved5vfs_vget_snapdir