At Mon, 5 Apr 2021 07:04:32 -0000 (UTC), mlel...@serpens.de (Michael van Elst) wrote: Subject: Re: how do I mount a read-only filesystem from the "root device" prompt? > > Someone would need to write code to "upgrade" vnodes. I doubt that's > trivial.
Indeed -- I've underestimated the complexity of such low-level changes
in the past -- they can snowball out of control!
> Fortunately it is not necessary. If the parent device is read-only,
> no "upgrade" will help to make it read-write. So you open read-write
> or fail back to read-only when necessary. An attempt to open a wedge
> read-write on a read-only opened parent device then has to fail.
Yes, this makes sense.
> I'm testing a patch for that...
Excellent! Thank you very much!
--
Greg A. Woods <gwo...@acm.org>
Kelowna, BC +1 250 762-7675 RoboHack <wo...@robohack.ca>
Planix, Inc. <wo...@planix.com> Avoncote Farms <wo...@avoncote.ca>
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