On Donnerstag, 19. März 2020 14:10:26 CET Ján Tomko wrote:
On a Tuesday in 2020, Christian Schoenebeck wrote:
>Introduce new 'multidevs' option for filesystem.
>
> <filesystem type='mount' accessmode='mapped' multidevs='remap'>
I don't like the 'multidevs' name, but cannot think of anything
beter.
'collisions' maybe?
Not sure if 'collisions' is better, e.g. collisions='remap' sounds scary. :)
And which collision would that be? At least IMO 'multidevs' is less ambigious.
I have no problem though to change it to whatever name you might come up with.
Just keep the resulting key-value pair set in mind:
multidevs='default'
multidevs='remap'
multidevs='forbid'
multidevs='warn'
vs.
collisions='default'
collisions='remap' <- probably misleading what 'remap' means in this case
collisions='forbid'
collisions='warn' <- wrong, it warns about multiple devices, not about file ID
collisions.
So different key-name might also require different value-names.
Another option would be the long form 'multi-devices=...'
> <source dir='/path'/>
> <target dir='mount_tag'>
>
> </filesystem>
>
>This option prevents misbheaviours on guest if a 9pfs export
>contains multiple devices, due to the potential file ID collisions
>this otherwise may cause.
>
>Signed-off-by: Christian Schoenebeck <address@hidden>
>---
>
> docs/formatdomain.html.in | 47 ++++++++++++++++++++++++++++++++++-
> docs/schemas/domaincommon.rng | 10 ++++++++
> src/conf/domain_conf.c | 30 ++++++++++++++++++++++
> src/conf/domain_conf.h | 13 ++++++++++
> src/qemu/qemu_command.c | 7 ++++++
> 5 files changed, 106 insertions(+), 1 deletion(-)
Please split the XML changes from the qemu driver changes.
Ok
Also missing:
* qemu_capabilities addition
AFAICS the common procedure is to add new capabilities always to the end of
the enum list. So I guess I will do that as well.
* qemuDomainDeviceDefValidateFS in qemu_domain.c - check for the capability,
reject this setting for virtiofs
Good to know where that check is supposed to go to, thanks!
* qemuxml2xmltest addition
* qemuxml2argvtest addition
Ok, I have to read up how those tests work. AFAICS I need to add xml files to
their data subdirs.
Separate patches required for those 2 tests?