guest agent: add guest agent RPCs/commands

This adds the initial set of QMP/QAPI commands provided by the guest
agent:

guest-sync
guest-ping
guest-info
guest-shutdown
guest-file-open
guest-file-read
guest-file-write
guest-file-seek
guest-file-flush
guest-file-close
guest-fsfreeze-freeze
guest-fsfreeze-thaw
guest-fsfreeze-status

The input/output specification for these commands are documented in the
schema.

Example usage:

  host:
    qemu -device virtio-serial \
         -chardev socket,path=/tmp/vs0.sock,server,nowait,id=qga0 \
         -device virtserialport,chardev=qga0,name=org.qemu.quest_agent.0
         ...

    echo "{'execute':'guest-info'}" | socat stdio unix-connect:/tmp/qga0.sock

  guest:
    qemu-ga -m virtio-serial -p /dev/virtio-ports/org.qemu.guest_agent.0 \
            -p /var/run/qemu-guest-agent.pid -d

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/qemu-ga.c b/qemu-ga.c
index 1f3585c..6e2f61f 100644
--- a/qemu-ga.c
+++ b/qemu-ga.c
@@ -636,6 +636,9 @@ int main(int argc, char **argv)
     g_log_set_default_handler(ga_log, s);
     g_log_set_fatal_mask(NULL, G_LOG_LEVEL_ERROR);
     s->logging_enabled = true;
+    s->command_state = ga_command_state_new();
+    ga_command_state_init(s, s->command_state);
+    ga_command_state_init_all(s->command_state);
     ga_state = s;
 
     module_call_init(MODULE_INIT_QAPI);
@@ -644,6 +647,7 @@ int main(int argc, char **argv)
 
     g_main_loop_run(ga_state->main_loop);
 
+    ga_command_state_cleanup_all(ga_state->command_state);
     unlink(pidfile);
 
     return 0;