+ umount /mnt
+ true
+ vnconfig -u vn0
+ true
+ rm -f /root/h1.img
+ dd 'of=/root/h1.img' 'bs=1m' 'count=0' 'seek=4096' 'status=none'
+ vnconfig -c vn0 /root/h1.img
+ newfs_hammer -f -L poison /dev/vn0
Volume 0 DEVICE /dev/vn0        size   4.00GB
initialize freemap volume 0
initializing the undo map (512 MB)
---------------------------------------------
HAMMER version 7
1 volume total size   4.00GB
root-volume:         /dev/vn0
boot-area-size:       32.00KB
memory-log-size:     256.00KB
undo-buffer-size:      0.50GB
total-pre-allocated:   0.52GB
fsid:                f374cf4c-a9ec-11f1-b526-010000000000

NOTE: Please remember that you may have to manually set up a
cron(8) job to prune and reblock the filesystem regularly.
By default, the system automatically runs 'hammer cleanup'
on a nightly basis.  The periodic.conf(5) variable
'daily_clean_hammer_enable' can be unset to disable this.
Also see 'man hammer' and 'man HAMMER' for more information.

WARNING: The minimum UNDO/REDO FIFO is   0.50GB, you really should not
try to format a HAMMER filesystem this small.

WARNING: HAMMER filesystems less than 50GB are not recommended!
You may have to run 'hammer prune-everything' and 'hammer reblock'
quite often, even if using a nohistory mount.
+ mount_hammer /dev/vn0 /mnt
+ hammer version /mnt
min=1 wip=none max=7 current=7 description="Use ISCSI CRC (faster than original crc32)"
available versions:
    1	NORM	First HAMMER release (DragonFly 2.0+)
    2	NORM	New directory entry layout (DragonFly 2.3+)
    3	NORM	New snapshot management (DragonFly 2.5+)
    4	NORM	New undo/flush, faster flush/sync (DragonFly 2.5+)
    5	NORM	Adjustments for dedup support (DragonFly 2.9+)
    6	NORM	Directory Hash ALG1 (tmp/rename resistance)
    7	NORM	Use ISCSI CRC (faster than original crc32)
+ mkdir -p /mnt/t
+ chmod 1777 /mnt/t
+ sync
+ echo '===== STAGE 1: unprivileged trigger (create pair, attempt unlink) ====='
+ /root/trig /mnt/t
===== STAGE 1: unprivileged trigger (create pair, attempt unlink) =====
[running as uid=65534 gid=65534 in /mnt/t]
[solver: 1722 wrap-zone names; identical-key pair selected]
nameA(created 1st, keeps K)  key=7fffffffff180000 len=11 bytes=6161616146712e0702dfbf
nameB(created 2nd, K+1)      key=7fffffffff180000 len=11 bytes=61616c6a33712e0a09aabf
key_end (K+max_iterations)   = 800000000017ffff wrapped=YES(negative)
create nameA      : OK
create nameB      : OK (create-time collision bump -> K+1)
stat   nameB      : OK (positive namecache may mask; see recheck)
unlink nameB      : OK
readdir nameB cnt : 0
RESULT: NOT-REPRODUCED
NEXT: remount the fs, then run recheck for the durable proof
TRIG_RC=1
===== STAGE 2: flush + unmount + remount (cold namecache, on-disk state) =====
+ echo 'TRIG_RC=1'
+ echo '===== STAGE 2: flush + unmount + remount (cold namecache, on-disk state) ====='
+ sync
+ sleep 8
+ sync
+ umount /mnt
+ mount_hammer /dev/vn0 /mnt
REMOUNT_OK
===== STAGE 3: durable manifestation =====
+ echo REMOUNT_OK
+ echo '===== STAGE 3: durable manifestation ====='
+ /root/recheck /mnt/t
[after remount, uid=65534, dir=/mnt/t]
nameA key=7fffffffff180000 len=11 bytes=6161616146712e0702dfbf
nameB key=7fffffffff180000 len=11 bytes=61616c6a33712e0a09aabf
persist stat   nameA : OK
persist stat   nameB : No such file or directory   <-- POISONED (dirent exists on disk)
persist readdir nameB: 0
persist unlink nameB : No such file or directory   <-- UNREMOVABLE
after 5 re-creates   : readdir nameB cnt = 1 (was 0)   <-- LEAK: one more unremovable dirent+inode each
PERSIST_UNCLEAR LEAK_CONFIRMED
RECHECK_RC=0
+ echo 'RECHECK_RC=0'
+ ls -la /mnt/t
total 0
drwxrwxrwt  1 root    wheel  0 Sep  6 12:17 .
drwxr-xr-x  1 root    wheel  0 Sep  6 12:17 ..
-rw-r--r--  1 nobody  wheel  0 Sep  6 12:17 aaaaFq.߿
-rw-r--r--  1 nobody  wheel  0 Sep  6 12:17 aalj3q.
	��
Filesystem   Size   Used  Avail Capacity  Mounted on
poison      3560M   225M  3335M     6%    /mnt
+ df -h /mnt
+ sync
RUN_DONE
+ echo RUN_DONE