[libvirt] [PATCH] util: storage: Fix build after 25924dec0f9329d429aadae14e273602307e2214

[Peter Krempa]

The commit referenced above changed function arguments of
virStorageFileGetMetadataFromBuf() but didn't tweak the
ATTRIBUTE_NONNULL tied to them. This was caught by coverity as it
actually obeys them. We disabled them for GCC and thus it didn't show
up.

Additionally in commit 3ea661deeabadc3c114dfb6f662b9fd17d714a01 I passed
NULL to the backingFormat argument which was also marked as nonnull. Use
a dummy int's address when the argument isn't supplied so that the code
doesn't need to change much.
---
 src/util/virstoragefile.c | 4 ++++
 src/util/virstoragefile.h | 3 +--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index 505b652..de0e27a 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -955,6 +955,10 @@ virStorageFileGetMetadataFromBuf(const char *path,
                                  int *backingFormat)
 {
     virStorageSourcePtr ret = NULL;
+    int dummy;
+
+    if (!backingFormat)
+        backingFormat = &dummy;

     if (!(ret = virStorageFileMetadataNew(path, format)))
         return NULL;
diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h
index 744a6ba..528cfad 100644
--- a/src/util/virstoragefile.h
+++ b/src/util/virstoragefile.h
@@ -301,8 +301,7 @@ virStorageSourcePtr virStorageFileGetMetadataFromBuf(const char *path,
                                                      size_t len,
                                                      int format,
                                                      int *backingFormat)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(4)
-    ATTRIBUTE_NONNULL(5);
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
 int virStorageFileChainGetBroken(virStorageSourcePtr chain,
                                  char **broken_file);

-- 
2.0.0