ioctl$BTRFS_IOC_RM_DEV_V2(0xffffffffffffffff, 0x5000943a, &(0x7f0000000300)={{}, 0x0, 0x0, @unused, @subvolid})
openat2$dir(0xffffffffffffff9c, &(0x7f0000000080)='./file0\x00', &(0x7f00000000c0), 0xfe8)