r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x644e2, 0x0)
pipe(&(0x7f00000001c0)={0xffffffffffffffff, <r1=>0xffffffffffffffff})
r2 = dup2(r0, r1)
mount$9p_fd(0x0, &(0x7f0000000080)='./file0\x00', &(0x7f00000000c0), 0x0, &(0x7f0000000100)={'trans=fd,', {'rfdno', 0x3d, r2}, 0x2c, {'wfdno', 0x3d, r1}})