В Mon, 20 Jan 2014 17:41:10 +0100
Thomas Renninger <trenn@xxxxxxx> пишет:
> Hi,
>
> due to a bug in another tool it came out that
> systemd/dracut cannot mount /sysroot if the same rootflags=
> parameter is passed twice:
> rootflags=subvol=@ rootflags=subvol=@
>
> Yep, this should be fixed somewhere else, but I still
> like to make the /sysroot mount more robust or at least find
> out what what is going on more detailed.
>
> journalctl -b -u sysroot.mount
> Jan 20 15:02:30 localhost systemd[1]: Failed to mount /sysroot.
> Jan 20 15:02:30 localhost systemd[1]: Unit sysroot.mount entered
> failed state. Jan 20 15:16:46 localhost systemd[1]:
> Mounting /sysroot... Jan 20 15:16:46 localhost mount[970]: mount:
> wrong fs type, bad option, bad superblock on /dev/vda2, Jan 20
> 15:16:46 localhost systemd[1]: sysroot.mount mount process exited,
> code=exited status=32
>
>
> It looks like in
> modules.d/99base/parse-root-opts.sh
> rflags is made to "subvol=@,subvol=@"
> and
> modules.d/95rootfs-block/mount-root.sh
> fails due to passing this as -o to mount?
>
> But what I am mostly missing is any dracut warning.
> I should see:
> modules.d/95rootfs-block/mount-root.sh:
> while ! mount -t ${rootfs} -o "$_rflags_ro" "${root#block:}"
> "$NEWROOT"; do warn "Failed to mount -t ${rootfs} -o $_rflags_ro
> ${root#block:} $NEWROOT" fsck_ask_err
> done
> ?
No. In your case rootflags are handled by systemd-fstab-generator.
Comment from systemd sources (src/fstab-generator/fstab-generator.c):
/* root= and roofstype= may occur more than once, the last instance
should take precedence.
* In the case of multiple rootflags= the arguments should be
concatenated */
You can see the generated mount unit from emergency shell. It should be
located here:
/run/systemd/generator/sysroot.mount
>
> This would give an obvios hint what is going wrong.
>
> But I cannot find where "warn" is even defined.
>
> Could be that I came on the wrong track somewhere.
> I guess there cannot be made much against passing bad (or doubled)
> rootflags= options, things will simply fail then, right?
>
> Still it would be nice if someone can give me a hint how I can
> debug similar stuff easier next time.
>
> Thanks!
>
> Thomas
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Alexander Tsoy
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