[linux-lvm] [PATCH] lib/metadata: add new api lv_is_available()

[David Teigland]

On Tue, Sep 01, 2020 at 05:09:23PM +0800, heming.zhao wrote:
> 'broken' is acceptable and good word.
> I'm only afraid end user don't know there is a new string item for lvs.
> like me, I just know the lv_health_status string item from Zdenek's mail. (sorry for my stupid)

I also like Zdenek's "usable", which seems to be closer to what we mean.
In addition to the reporting field can could be a new letter in the 9th lv
attr field.  (We'd have to figure out the priority of this letter vs the
others.)

> I prefer lvm report status from the entire LV side.
> lvm provides virtual blocks to upper layer softwares, most of softwares use whole virtual disk.

Limit this to what lvm knows already.  The field will represent whether
lvm believes the uppser layer can successfully do io to the entire LV.

Dave