[libvirt] [PATCH v5 1/5] Introduce virDomainFSFreeze() and virDomainFSThaw() public API

[Daniel P. Berrange]

On Thu, Apr 03, 2014 at 11:39:29AM -0400, Tomoki Sekiyama wrote:
> These will freeze and thaw filesystems within guest. The APIs take @disks
> and @ndisks parameters to specify disks to be frozen or thawed.
> The parameters can be NULL and 0, then the all mounted filesystes are
> frozen or thawed. If some disks are frozen multiple times, they are not
> thawed until requested to be thawed as many times as freeze request.
> @flags parameter, which are currently not used, is for future extensions.
> 
> Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama at hds.com>
> ---
>  include/libvirt/libvirt.h.in |   10 +++++
>  src/driver.h                 |   14 ++++++
>  src/libvirt.c                |   92 ++++++++++++++++++++++++++++++++++++++++++
>  src/libvirt_public.syms      |    6 +++
>  4 files changed, 122 insertions(+)
> 
> diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
> index 930b7e8..d408f19 100644
> --- a/include/libvirt/libvirt.h.in
> +++ b/include/libvirt/libvirt.h.in
> @@ -5277,6 +5277,16 @@ int virDomainFSTrim(virDomainPtr dom,
>                      unsigned long long minimum,
>                      unsigned int flags);
>  
> +int virDomainFSFreeze(virDomainPtr dom,
> +                      const char **disks,
> +                      unsigned int ndisks,
> +                      unsigned int flags);
> +
> +int virDomainFSThaw(virDomainPtr dom,
> +                    const char **disks,
> +                    unsigned int ndisks,
> +                    unsigned int flags);

Are all guests OS required to support unfreeze on a per disk
basis. I vaguely recall someone mentioning that some OS can
do all-or-none only.

Regards,
Daniel
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