r0 = socket$inet6_udp(0xa, 0x2, 0x0)
ioctl$BTRFS_IOC_INO_LOOKUP_USER(0xffffffffffffffff, 0xd000943e, 0x0)
connect$inet6(r0, &(0x7f0000000000)={0xa, 0x0, 0x0, @mcast2, 0x5}, 0x1c)
sendmmsg$inet6(r0, &(0x7f0000004d00)=[{{0x0, 0x0, 0x0}}], 0x1, 0x0)