https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192715
Bug ID: 192715
Summary: zfs diff does not report accurate file deletion
differences
Product: Base System
Version: 9.3-RELEASE
Hardware: amd64
OS: Any
Status: Needs Triage
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
'zfs diff' does not report accurate file deletion differences. I noticed this
when I created a snapshot of a dataset, removed some files, and then performed
a diff. It did not show all the files that were removed. Here's a recipe to
reproduce:
[root@atlantis ~]# zfs create tank/test
[root@atlantis ~]# cd /tank/test
[root@atlantis /tank/test]# touch a
[root@atlantis /tank/test]# zfs snapshot tank/test@1
[root@atlantis /tank/test]# zfs snapshot tank/test@2
[root@atlantis /tank/test]# rm a
[root@atlantis /tank/test]# zfs diff tank/test@1
M /tank/test/
- /tank/test/a
[root@atlantis /tank/test]# zfs diff tank/test@2
M /tank/test/
[root@atlantis /tank/test]#
[root@atlantis /tank/test]# uname -a
However, I'm not sure if this is the only case that triggers this bug.
I am running 9.3-RELEASE:
[root@atlantis /tank/test]# uname -a
FreeBSD atlantis 9.3-RELEASE FreeBSD 9.3-RELEASE #0 r268512: Thu Jul 10
23:44:39 UTC 2014 [email protected]:/usr/obj/usr/src/sys/GENERIC amd64
I'm apparently not the only one experiencing this. A search on Illumos' bug
tracker let me to this issue:
https://www.illumos.org/issues/3043
which led to this issue in zfsonlinux:
https://github.com/zfsonlinux/zfs/issues/2081.
For what it's worth, my zpool was originally created as v28 on 9.0-RELEASE and
has been upgrated to v5000 with the following feature flags:
tank feature@async_destroy enabled local
tank feature@empty_bpobj active local
tank feature@lz4_compress enabled local
tank feature@multi_vdev_crash_dump enabled local
tank feature@spacemap_histogram active local
tank feature@enabled_txg active local
tank feature@hole_birth active local
tank feature@extensible_dataset enabled local
tank feature@bookmarks enabled local
tank feature@filesystem_limits enabled local
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