[libvirt] [PATCH 09/11] tests: drivermodule: Make sure that all compiled storage backends can be loaded

[Peter Krempa]

Add a new storage driver registration function that will force the
backend code to fail if any of the storage backend modules can't be
loaded. This will make sure that they work and are present.
---
 src/storage/storage_backend.c | 16 ++++++++++++----
 src/storage/storage_backend.h |  2 +-
 src/storage/storage_driver.c  | 19 +++++++++++++++++--
 src/storage/storage_driver.h  |  1 +
 tests/virdrivermoduletest.c   |  2 +-
 tests/virstoragetest.c        |  2 +-
 6 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c
index 32f45e841..ce278b99c 100644
--- a/src/storage/storage_backend.c
+++ b/src/storage/storage_backend.c
@@ -87,7 +87,8 @@ static size_t virStorageFileBackendsCount;

 static int
 virStorageDriverLoadBackendModule(const char *name,
-                                  const char *regfunc)
+                                  const char *regfunc,
+                                  bool forceload)
 {
     char *modfile = NULL;
     int ret;
@@ -100,7 +101,14 @@ virStorageDriverLoadBackendModule(const char *name,
                                             "LIBVIRT_STORAGE_BACKEND_DIR")))
         return 1;

-    ret = virDriverLoadModuleFull(modfile, regfunc, NULL);
+    if ((ret = virDriverLoadModuleFull(modfile, regfunc, NULL)) != 0) {
+        if (forceload) {
+            virReportError(VIR_ERR_INTERNAL_ERROR,
+                           _("failed to load storage backend module '%s'"),
+                           name);
+            ret = -1;
+        }
+    }

     VIR_FREE(modfile);

@@ -109,7 +117,7 @@ virStorageDriverLoadBackendModule(const char *name,


 # define VIR_STORAGE_BACKEND_REGISTER(func, module)                            \
-    if (virStorageDriverLoadBackendModule(module, #func) < 0)                  \
+    if (virStorageDriverLoadBackendModule(module, #func, allbackends) < 0)     \
         return -1
 #else
 # define VIR_STORAGE_BACKEND_REGISTER(func, module)                            \
@@ -118,7 +126,7 @@ virStorageDriverLoadBackendModule(const char *name,
 #endif

 int
-virStorageBackendDriversRegister(void)
+virStorageBackendDriversRegister(bool allbackends ATTRIBUTE_UNUSED)
 {
 #if WITH_STORAGE_DIR || WITH_STORAGE_FS
     VIR_STORAGE_BACKEND_REGISTER(virStorageBackendFsRegister, "fs");
diff --git a/src/storage/storage_backend.h b/src/storage/storage_backend.h
index ca6c19c45..f433071f4 100644
--- a/src/storage/storage_backend.h
+++ b/src/storage/storage_backend.h
@@ -198,7 +198,7 @@ struct _virStorageFileBackend {
     virStorageFileBackendChown  storageFileChown;
 };

-int virStorageBackendDriversRegister(void);
+int virStorageBackendDriversRegister(bool allmodules);

 int virStorageBackendRegister(virStorageBackendPtr backend);
 int virStorageBackendFileRegister(virStorageFileBackendPtr backend);
diff --git a/src/storage/storage_driver.c b/src/storage/storage_driver.c
index 7fafbcf75..0bc047f23 100644
--- a/src/storage/storage_driver.c
+++ b/src/storage/storage_driver.c
@@ -2838,9 +2838,10 @@ static virStateDriver stateDriver = {
     .stateReload = storageStateReload,
 };

-int storageRegister(void)
+static int
+storageRegisterFull(bool allbackends)
 {
-    if (virStorageBackendDriversRegister() < 0)
+    if (virStorageBackendDriversRegister(allbackends) < 0)
         return -1;
     if (virSetSharedStorageDriver(&storageDriver) < 0)
         return -1;
@@ -2850,6 +2851,20 @@ int storageRegister(void)
 }


+int
+storageRegister(void)
+{
+    return storageRegisterFull(false);
+}
+
+
+int
+storageRegisterAll(void)
+{
+    return storageRegisterFull(true);
+}
+
+
 /* ----------- file handlers cooperating with storage driver --------------- */
 static bool
 virStorageFileIsInitialized(const virStorageSource *src)
diff --git a/src/storage/storage_driver.h b/src/storage/storage_driver.h
index 682c9ff82..f0aca3671 100644
--- a/src/storage/storage_driver.h
+++ b/src/storage/storage_driver.h
@@ -70,5 +70,6 @@ char *virStoragePoolObjBuildTempFilePath(virStoragePoolObjPtr pool,
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;

 int storageRegister(void);
+int storageRegisterAll(void);

 #endif /* __VIR_STORAGE_DRIVER_H__ */
diff --git a/tests/virdrivermoduletest.c b/tests/virdrivermoduletest.c
index e440350c2..13d51a8e9 100644
--- a/tests/virdrivermoduletest.c
+++ b/tests/virdrivermoduletest.c
@@ -71,7 +71,7 @@ mymain(void)
     TEST("interface");
 #endif
 #ifdef WITH_STORAGE
-    TEST("storage");
+    TEST_FULL("storage", "storageRegisterAll");
 #endif
 #ifdef WITH_NODE_DEVICES
     TEST("nodedev");
diff --git a/tests/virstoragetest.c b/tests/virstoragetest.c
index d715fd762..36567753b 100644
--- a/tests/virstoragetest.c
+++ b/tests/virstoragetest.c
@@ -732,7 +732,7 @@ mymain(void)
     virStorageSourcePtr chain2; /* short for chain->backingStore */
     virStorageSourcePtr chain3; /* short for chain2->backingStore */

-    if (virStorageBackendDriversRegister() < 0)
+    if (virStorageBackendDriversRegister(false) < 0)
        return -1;

     /* Prep some files with qemu-img; if that is not found on PATH, or
-- 
2.11.0