r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\x00', 0x46e2, 0x0)
r1 = openat$procfs(0xffffffffffffff9c, &(0x7f00000000c0)='/proc/mdstat\x00', 0x0, 0x0)
mount$9p_fd(0x0, &(0x7f0000000000)='./file0\x00', &(0x7f0000000080), 0x0, &(0x7f0000000580)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}})