[Bug 239797] zfs promote corrupted df/mount output of device names of UFS filesystems

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239797

            Bug ID: 239797
           Summary: zfs promote corrupted df/mount output of device names
                    of UFS filesystems
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: ota at j.email.ne.jp

After running several zfs promote and zfs destroy commands, the output of
df/mount incorrectly list zvol name for / and /usr UFS filesystems.  Below is
the output of zfs list and df to compare.

sys/zlib_BBD_CTF at starting_bxe prefixes to these UFS filesystems are incorrect.
I didn't see any functionality issues with these although I wasn't comfortable.

After rebooting, the output of df and mount became correct.


% zfs list
NAME                USED  AVAIL  REFER  MOUNTPOINT
sys                15.6G  7.12G   262K  /mnt/sys
sys/local          4.39G  7.12G  2.20G  /usr/local
sys/obj            6.43G  7.12G  6.43G  /usr/obj
sys/ports           309M  7.12G   309M  /usr/ports
sys/ports-build    16.5M  7.12G  16.5M  /ports
sys/src-git-zlib   2.96G  7.12G  1.51G  /usr/obj/freebsd
sys/src2            742M  7.12G   742M  /usr/src
sys/zlib-dual-git  77.2M  7.12G  1.76G  /mnt/sys/zlib-dual-git
sys/zlib_BBD_CTF    729M  7.12G   729M  /usr/obj/zlib
% df -h
Filesystem                                   Size    Used   Avail Capacity 
Mounted on
sys/zlib_BBD_CTF at starting_bxe/dev/ada0s1a    989M    779M    131M    86%    /
devfs                                        1.0K    1.0K      0B   100%   
/dev
sys/zlib_BBD_CTF at starting_bxe/dev/ada0s1d    6.8G    2.6G    3.7G    41%   
/usr
tmpfs                                        2.0G     28K    2.0G     0%   
/tmp
tmpfs                                        2.0G    4.0K    2.0G     0%   
/usr/tmp
sys                                          7.1G    262K    7.1G     0%   
/mnt/sys
sys/obj                                       14G    6.4G    7.1G    47%   
/usr/obj
sys/ports-build                              7.1G     16M    7.1G     0%   
/ports
sys/src2                                     7.8G    742M    7.1G     9%   
/usr/src
sys/local                                    9.3G    2.2G    7.1G    24%   
/usr/local
sys/ports                                    7.4G    309M    7.1G     4%   
/usr/ports
sys/zlib_BBD_CTF                             7.8G    729M    7.1G     9%   
/usr/obj/zlib
sys/zlib-dual-git                            8.9G    1.8G    7.1G    20%   
/mnt/sys/zlib-dual-git
sys/src-git-zlib                             8.6G    1.5G    7.1G    18%   
/usr/obj/freebsd

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