r0 = openat$sr(0xffffffffffffff9c, &(0x7f00000035c0), 0xe8b02, 0x0)
ioctl$SG_IO(r0, 0x401870cc, 0x0)
ioctl$BTRFS_IOC_BALANCE_PROGRESS(0xffffffffffffffff, 0x84009422, 0x0)