VFCF_JAIL
PSEUDOFS(lindebugfs, 1, VFCF_JAIL);
PSEUDOFS(linprocfs, 1, VFCF_JAIL);
PSEUDOFS(linsysfs, 1, VFCF_JAIL);
VFS_SET(devfs_vfsops, devfs, VFCF_SYNTHETIC | VFCF_JAIL);
VFS_SET(fdesc_vfsops, fdescfs, VFCF_SYNTHETIC | VFCF_JAIL);
.vfc_flags = VFCF_JAIL | VFCF_SYNTHETIC
VFS_SET(null_vfsops, nullfs, VFCF_LOOPBACK | VFCF_JAIL | VFCF_FILEMOUNT);
VFS_SET(p9fs_vfsops, p9fs, VFCF_JAIL);
PSEUDOFS(procfs, 1, VFCF_JAIL);
VFS_SET(tmpfs_vfsops, tmpfs, VFCF_JAIL);
if ((vfc->vfc_flags & VFCF_JAIL) != 0)
{ .flag = VFCF_JAIL, .str = "jail", },