Re: VFS mount rollback for virtio 9pfs

From: Felix Palmen <felix_at_palmen-it.de>
Date: Fri, 15 Jul 2022 15:15:09 UTC 
* Felix Palmen <felix@palmen-it.de> [20220715 15:16]:
> I tested it, successful so far as it seems! Thanks again!

Unfortunately, it doesn't work reliably yet. Trying a testport with
poudriere logs mounted via virtfs, I got errors like these:

#v+
/usr/bin/awk: can't open file 14a-default/2022-07-15_16h43m01s/.poudriere.jailname
 input record number 1, file 14a-default/2022-07-15_16h43m01s/.poudriere.jailname

rename: /usr/local/poudriere/data/logs/bulk/14a-default/2022-07-15_16h43m01s/.tmp-.poudriere.snap_loadavg.OV0Gxx2m to /usr/local/poudriere/data/logs/bulk/14a-default/2022-07-15_16h43m01s/.poudriere.snap_loadavg: Invalid argument

_mktemp: mkstemp failed on 14a-default/2022-07-15_16h43m01s/.tmp-.data.json.stpmwmGg: Invalid argument

mapfile_write: Missing handle
#v-

after that, the mount is somehow broken:

# ls -l /usr/local/poudriere/data/logs/
ls: bulk: Invalid argument

So, probably it's back to NFS *for now*.

Still the best attempt I've seen so far, all others I tried crashed the
kernel on mount ;)

BR, Felix

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