mount information intermixing on 11.1-RELEASE (ZFS)

[Georg Bege]

Supplement:
After a reboot, the flawed output of mount(8) (and df(1)) disappeared.

Am 09.06.2018 um 12:54 schrieb Georg Bege:
> Hello folks,
> 
> I just spotted a very strange bug on 11.1-RELEASE.
> (It might be fixed already?)
> 
> While working with my ZFS (mirrored pool / 2 SSDs), I wanted to 
> originally track 11-STABLE and moved my original /usr/src around.
> 
> The original steps were:
> 1) zfs snapshot lazarus/usr/src at RELENG_11.1
> 2) zfs clone lazarus/usr/src at RELENG_11.1  lazarus/usr/src-RELENG_11.1
> 3) zfs promote lazarus/usr/src-RELENG_11.1
> 4) zfs destroy lazarus/usr/src
> ...
> 
> So nothing too fancy (lazarus is the name of my pool).
> I didnt first notice, but after doing this I get now intermixed output 
> while using mount(8) and df(1).
> 
> EXCERPT
> -----------------------------------------------------------------------
> lazarus/usr/src-RELENG_11.1 at RELENG_11.1/dev/ada3p3 on 
> /virtuals/therion/images (ufs, local, journaled soft-updates)
> lazarus/usr/src-RELENG_11.1 at RELENG_11.1/dev/zvol/lazarus/home/therion.eli on 
> /home/therion (ufs, local, journaled soft-updates)
> lazarus/usr/src-RELENG_11.1 at RELENG_11.1/dev/fuse on /home/therion/.gvfs 
> (fusefs, local, nosuid, synchronous, mounted by therion)
> -----------------------------------------------------------------------
> 
> So what is happening here is that the 
> "lazarus/usr/src-RELENG_11.1 at RELENG_11.1" is prepended to the original 
> lines, which would normally *not* include this.
> 
> This doesnt happen with all lines.... only these ones - after the last 
> line it continues with:
> 
> 192.168.0.5:/warehouse on /warehouse (nfs, nosuid, nfsv4acls, mounted by 
> therion)
> lazarus/usr/src on /usr/src (zfs, local, nfsv4acls)
> 
> so just normally...
> The RELENG_11.1 dataset I've created is not mounted:
> 
> EXCERPT
> -----------------------------------------------------------------------
> root at lazarus:~ # zfs get mounted lazarus/usr/src-RELENG_11.1
> NAME                         PROPERTY  VALUE    SOURCE
> lazarus/usr/src-RELENG_11.1  mounted   no       -
> -----------------------------------------------------------------------
> 
> Has anyone ever spotted this?
> I suspect a parsing error while consuming the information mount(8) 
> needs, wherever this information comes from.
> 
> regards,
> Georg

-- 
Georg Bege
Mail: georg at bege.email
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