Re: [Qemu-devel] virtfs/9p duplicate inodes

[Christian Schoenebeck <qemu_oss@crudebyte.com>]

On Samstag, 30. März 2019 21:01:28 CEST Christian Schoenebeck wrote:
> On Samstag, 30. März 2019 17:47:51 CET Greg Kurz wrote:
> > Maybe have a look at this tentative to fix QID collisions:
> > 
> > https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg02283.html
[snip]
> Question: so far I just had a look at that patch set, but haven't tried it
> yet. Am I correct that the inode numbers (of the same file) would actually
> change on guest side with every reboot (i.e. depending on the precise
> sequence individual files would be accessed by guest after each reboot)?

I intended to extend Antonios' patch set regarding 9p QID collisions with the 
goal to make the ids constant beyond reboots by storing the qpp_table as fs 
xattr.

My plan was to load the qpp_table in v9fs_device_realize_common() and save the 
table only once in v9fs_device_unrealize_common(), instead of storing the 
table on every new insertion. The problem though is that none of the 9p 
unrealize functions is called on guest shutdowns.

Is there any callback that is guaranteed to be called on guest shutdowns?

Best regards,
Christian Schoenebeck