On Sun, 11 Dec 2011 12:00:12 +0200
Dor Laor <dl...@redhat.com> wrote:
> On 12/08/2011 08:52 PM, Luiz Capitulino wrote:
> > This is basically suspend to disk on a Linux guest.
> >
> > Signed-off-by: Luiz Capitulino<lcapitul...@redhat.com>
> > ---
> >
> > This is an RFC because I did it as simple as possible and I'm open to
> > suggestions...
> >
> > Now, while testing this or even "echo disk> /sys/power/state" I get several
>
> Beyond the previous comments about virtio s4 that Amit solved and
> pm-hibernate I think it will be nice to add suspend to ram (s3) option
> too. Currently qemu wakes up immediately after s3 but it can be fixed
> and it can pause the guest and wait to a keyboard event or monitor command.
I thought adding it in this RFC, but I decided to keep it simple. Will add
it to v2.
>
> > funny results. Some times qemu just dies after printing that message:
> >
> > "Guest moved used index from 20151 to 1"
> >
> > Some times it doesn't die, but I'm unable to log into the guest: I type
> > username& password but the terminal kind of locks (the shell doesn't run).
> >
> > Some times it works...
> >
> > qapi-schema-guest.json | 11 +++++++++++
> > qga/guest-agent-commands.c | 19 +++++++++++++++++++
> > 2 files changed, 30 insertions(+), 0 deletions(-)
> >
> > diff --git a/qapi-schema-guest.json b/qapi-schema-guest.json
> > index fde5971..2c5bbcf 100644
> > --- a/qapi-schema-guest.json
> > +++ b/qapi-schema-guest.json
> > @@ -215,3 +215,14 @@
> > ##
> > { 'command': 'guest-fsfreeze-thaw',
> > 'returns': 'int' }
> > +
> > +##
> > +# @guest-hibernate
> > +#
> > +# Save RAM contents to disk and powerdown the guest.
> > +#
> > +# Notes: This command doesn't return on success.
> > +#
> > +# Since: 1.1
> > +##
> > +{ 'command': 'guest-hibernate' }
> > diff --git a/qga/guest-agent-commands.c b/qga/guest-agent-commands.c
> > index 6da9904..9dd4060 100644
> > --- a/qga/guest-agent-commands.c
> > +++ b/qga/guest-agent-commands.c
> > @@ -550,6 +550,25 @@ int64_t qmp_guest_fsfreeze_thaw(Error **err)
> > }
> > #endif
> >
> > +#define LINUX_SYS_STATE_FILE "/sys/power/state"
> > +
> > +void qmp_guest_hibernate(Error **err)
> > +{
> > + int fd;
> > +
> > + fd = open(LINUX_SYS_STATE_FILE, O_WRONLY);
> > + if (fd< 0) {
> > + error_set(err, QERR_OPEN_FILE_FAILED, LINUX_SYS_STATE_FILE);
> > + return;
> > + }
> > +
> > + if (write(fd, "disk", 4)< 0) {
> > + error_set(err, QERR_UNDEFINED_ERROR);
> > + }
> > +
> > + close(fd);
> > +}
> > +
> > /* register init/cleanup routines for stateful command groups */
> > void ga_command_state_init(GAState *s, GACommandState *cs)
> > {
>
