r0 = fsopen(&(0x7f0000000000)='pipefs\x00', 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x66e2, 0x0)
mount$9p_fd(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000000140), 0x0, &(0x7f0000000180)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})