module: silence errors for module_load_qom_all().

Add mayfail bool parameter to module loading functions.  Set it to true
for module_load_qom_all() because device modules might not load into all
system emulation variants.  qemu-system-s390x for example will not load
qxl because it lacks vga support.  Makes "make check" less chatty.

Drop module_loaded_qom_all check in module_load_qom_one to make sure we
see errors for explicit load requests, i.e. module_load_qom_one("qxl")
failing will log an error no matter whenever module_load_qom_all() was
called before or not.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20200923091217.22662-1-kraxel@redhat.com

3 files changed, 15 insertions, 15 deletions

diff --git a/include/qemu/module.h b/include/qemu/module.h
index 9121a475c1..944d403cbd 100644
--- a/include/qemu/module.h
+++ b/include/qemu/module.h
@@ -61,15 +61,15 @@ typedef enum {
 #define fuzz_target_init(function) module_init(function, \
                                                MODULE_INIT_FUZZ_TARGET)
 #define migration_init(function) module_init(function, MODULE_INIT_MIGRATION)
-#define block_module_load_one(lib) module_load_one("block-", lib)
-#define ui_module_load_one(lib) module_load_one("ui-", lib)
-#define audio_module_load_one(lib) module_load_one("audio-", lib)
+#define block_module_load_one(lib) module_load_one("block-", lib, false)
+#define ui_module_load_one(lib) module_load_one("ui-", lib, false)
+#define audio_module_load_one(lib) module_load_one("audio-", lib, false)
 
 void register_module_init(void (*fn)(void), module_init_type type);
 void register_dso_module_init(void (*fn)(void), module_init_type type);
 
 void module_call_init(module_init_type type);
-bool module_load_one(const char *prefix, const char *lib_name);
+bool module_load_one(const char *prefix, const char *lib_name, bool mayfail);
 void module_load_qom_one(const char *type);
 void module_load_qom_all(void);
 
diff --git a/softmmu/qtest.c b/softmmu/qtest.c
index 2c6e8dc858..7965dc9a16 100644
--- a/softmmu/qtest.c
+++ b/softmmu/qtest.c
@@ -757,7 +757,7 @@ static void qtest_process_command(CharBackend *chr, gchar **words)
         g_assert(words[1] && words[2]);
 
         qtest_send_prefix(chr);
-        if (module_load_one(words[1], words[2])) {
+        if (module_load_one(words[1], words[2], false)) {
             qtest_sendf(chr, "OK\n");
         } else {
             qtest_sendf(chr, "FAIL\n");
diff --git a/util/module.c b/util/module.c
index a44ec38d93..836fd444e1 100644
--- a/util/module.c
+++ b/util/module.c
@@ -110,7 +110,7 @@ void module_call_init(module_init_type type)
 }
 
 #ifdef CONFIG_MODULES
-static int module_load_file(const char *fname)
+static int module_load_file(const char *fname, bool mayfail)
 {
     GModule *g_module;
     void (*sym)(void);
@@ -134,8 +134,10 @@ static int module_load_file(const char *fname)
 
     g_module = g_module_open(fname, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
     if (!g_module) {
-        fprintf(stderr, "Failed to open module: %s\n",
-                g_module_error());
+        if (!mayfail) {
+            fprintf(stderr, "Failed to open module: %s\n",
+                    g_module_error());
+        }
         ret = -EINVAL;
         goto out;
     }
@@ -167,7 +169,7 @@ out:
 }
 #endif
 
-bool module_load_one(const char *prefix, const char *lib_name)
+bool module_load_one(const char *prefix, const char *lib_name, bool mayfail)
 {
     bool success = false;
 
@@ -218,7 +220,7 @@ bool module_load_one(const char *prefix, const char *lib_name)
     for (i = 0; i < n_dirs; i++) {
         fname = g_strdup_printf("%s/%s%s",
                 dirs[i], module_name, CONFIG_HOST_DSOSUF);
-        ret = module_load_file(fname);
+        ret = module_load_file(fname, mayfail);
         g_free(fname);
         fname = NULL;
         /* Try loading until loaded a module file */
@@ -275,13 +277,11 @@ void module_load_qom_one(const char *type)
     if (!type) {
         return;
     }
-    if (module_loaded_qom_all) {
-        return;
-    }
     for (i = 0; i < ARRAY_SIZE(qom_modules); i++) {
         if (strcmp(qom_modules[i].type, type) == 0) {
             module_load_one(qom_modules[i].prefix,
-                            qom_modules[i].module);
+                            qom_modules[i].module,
+                            false);
             return;
         }
     }
@@ -302,7 +302,7 @@ void module_load_qom_all(void)
             /* one module implementing multiple types -> load only once */
             continue;
         }
-        module_load_one(qom_modules[i].prefix, qom_modules[i].module);
+        module_load_one(qom_modules[i].prefix, qom_modules[i].module, true);
     }
     module_loaded_qom_all = true;
 }