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, 2 insertions, 0 deletions

diff --git a/qga/guest-agent-core.h b/qga/guest-agent-core.h
index 66d1729689..e42b91d364 100644
--- a/qga/guest-agent-core.h
+++ b/qga/guest-agent-core.h
@@ -14,10 +14,12 @@
 #include "qemu-common.h"
 
 #define QGA_VERSION "1.0"
+#define QGA_READ_COUNT_DEFAULT 4 << 10
 
 typedef struct GAState GAState;
 typedef struct GACommandState GACommandState;
 
+void ga_command_state_init(GAState *s, GACommandState *cs);
 void ga_command_state_add(GACommandState *cs,
                           void (*init)(void),
                           void (*cleanup)(void));