Guest: DragonFly dfbsd 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026
        root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64
Kernel: stock INVARIANTS kernel #0 (no audit patches applied)
Compiler (guest): DragonFly cc → cc -O -I/usr/src/sys (cc.log empty = clean build)
Run as: root (HAMMER2IOC_RECLUSTER requires SYSCAP_NOVFS_IOCTL)
Mount under test: /dev/vn0@testvol (128 MB vn-backed image, newfs_hammer2 -L testvol)
                  mounted at /mnt/h2poc2666, local PFS (no cluster_fd at mount)
Post-run state: guest clean — volume unmounted, vn0 detached, kern.openfiles 93