qga: Disable unsupported commands by default

Currently management softwares cannot know whether a qemu-ga command is
supported or not on the running platform until they actually execute it.
This patch disables unsupported commands at launch time of qemu-ga, so that
management softwares can check whether they are supported from 'enabled'
property of the result from 'guest-info' command.

Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama@hds.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

qga/commands-posix.c

@@ -1955,6 +1955,44 @@ void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
 }
 #endif
 
+/* add unsupported commands to the blacklist */
+GList *ga_command_blacklist_init(GList *blacklist)
+{
+#if !defined(__linux__)
+    {
+        const char *list[] = {
+            "guest-suspend-disk", "guest-suspend-ram",
+            "guest-suspend-hybrid", "guest-network-get-interfaces",
+            "guest-get-vcpus", "guest-set-vcpus", NULL};
+        char **p = (char **)list;
+
+        while (*p) {
+            blacklist = g_list_append(blacklist, *p++);
+        }
+    }
+#endif
+
+#if !defined(CONFIG_FSFREEZE)
+    {
+        const char *list[] = {
+            "guest-get-fsinfo", "guest-fsfreeze-status",
+            "guest-fsfreeze-freeze", "guest-fsfreeze-freeze-list",
+            "guest-fsfreeze-thaw", "guest-get-fsinfo", NULL};
+        char **p = (char **)list;
+
+        while (*p) {
+            blacklist = g_list_append(blacklist, *p++);
+        }
+    }
+#endif
+
+#if !defined(CONFIG_FSTRIM)
+    blacklist = g_list_append(blacklist, (char *)"guest-fstrim");
+#endif
+
+    return blacklist;
+}
+
 /* register init/cleanup routines for stateful command groups */
 void ga_command_state_init(GAState *s, GACommandState *cs)
 {

qga/commands-win32.c

@@ -446,10 +446,40 @@ int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
     return -1;
 }
 
+/* add unsupported commands to the blacklist */
+GList *ga_command_blacklist_init(GList *blacklist)
+{
+    const char *list_unsupported[] = {
+        "guest-file-open", "guest-file-close", "guest-file-read",
+        "guest-file-write", "guest-file-seek", "guest-file-flush",
+        "guest-suspend-hybrid", "guest-network-get-interfaces",
+        "guest-get-vcpus", "guest-set-vcpus",
+        "guest-fsfreeze-freeze-list", "guest-get-fsinfo",
+        "guest-fstrim", NULL};
+    char **p = (char **)list_unsupported;
+
+    while (*p) {
+        blacklist = g_list_append(blacklist, *p++);
+    }
+
+    if (!vss_init(true)) {
+        const char *list[] = {
+            "guest-get-fsinfo", "guest-fsfreeze-status",
+            "guest-fsfreeze-freeze", "guest-fsfreeze-thaw", NULL};
+        p = (char **)list;
+
+        while (*p) {
+            blacklist = g_list_append(blacklist, *p++);
+        }
+    }
+
+    return blacklist;
+}
+
 /* register init/cleanup routines for stateful command groups */
 void ga_command_state_init(GAState *s, GACommandState *cs)
 {
-    if (vss_init(true)) {
+    if (!vss_initialized()) {
         ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
     }
 }

qga/guest-agent-core.h

@@ -19,6 +19,7 @@ typedef struct GAState GAState;
 typedef struct GACommandState GACommandState;
 extern GAState *ga_state;
 
+GList *ga_command_blacklist_init(GList *blacklist);
 void ga_command_state_init(GAState *s, GACommandState *cs);
 void ga_command_state_add(GACommandState *cs,
                           void (*init)(void),

qga/main.c

@@ -1144,6 +1144,7 @@ int main(int argc, char **argv)
         goto out_bad;
     }
 
+    blacklist = ga_command_blacklist_init(blacklist);
     if (blacklist) {
         s->blacklist = blacklist;
         do {