From 67084ed4ae68f47442f7cf37c0e74d887071cfb4 Mon Sep 17 00:00:00 2001
From: Peter Krempa <pkrempa@redhat.com>
Date: Wed, 16 Apr 2014 15:44:06 +0200
Subject: [PATCH] util: storage: Move checking of the actual backing image to
 the worker

Move the code checking the presence of the backing file to the recursive
worker function instead of the metadata parser. The recursive worker
will later be changed to parse more than just local files and this
change will help the separation.
---
 src/util/virstoragefile.c | 60 ++++++++++++++++-----------------------
 1 file changed, 25 insertions(+), 35 deletions(-)

diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index 8cd8e48ae5..19e69dc1f9 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -803,8 +803,7 @@ virStorageFileGetMetadataInternal(const char *path,
                                   size_t len,
                                   int format,
                                   virStorageFileMetadataPtr meta,
-                                  int *backingFormat,
-                                  char **backingDirectory)
+                                  int *backingFormat)
 {
     int ret = -1;
 
@@ -871,31 +870,6 @@ virStorageFileGetMetadataInternal(const char *path,
 
         if (store == BACKING_STORE_ERROR)
             goto cleanup;
-
-        if (meta->backingStoreRaw) {
-            if (virStorageIsFile(meta->backingStoreRaw)) {
-                if (virFindBackingFile(directory,
-                                       meta->backingStoreRaw,
-                                       backingDirectory,
-                                       &meta->backingStore) < 0) {
-                    /* the backing file is (currently) unavailable, treat this
-                     * file as standalone:
-                     * backingStoreRaw is kept to mark broken image chains */
-                    *backingFormat = VIR_STORAGE_FILE_NONE;
-                    VIR_WARN("Backing file '%s' of image '%s' is missing.",
-                             meta->backingStoreRaw, path);
-
-                }
-            } else {
-                if (VIR_STRDUP(meta->backingStore, meta->backingStoreRaw) < 0)
-                    goto cleanup;
-
-                *backingFormat = VIR_STORAGE_FILE_RAW;
-            }
-        } else {
-            meta->backingStore = NULL;
-            *backingFormat = VIR_STORAGE_FILE_NONE;
-        }
     }
 
     if (fileTypeInfo[format].getFeatures != NULL &&
@@ -1016,7 +990,7 @@ virStorageFileGetMetadataFromBuf(const char *path,
 
     if (virStorageFileGetMetadataInternal(path, canonPath, ".", buf, len,
                                           format, ret,
-                                          backingFormat, NULL) < 0) {
+                                          backingFormat) < 0) {
         virStorageFileFreeMetadata(ret);
         ret = NULL;
     }
@@ -1040,8 +1014,7 @@ virStorageFileGetMetadataFromFDInternal(const char *path,
                                         int fd,
                                         int format,
                                         virStorageFileMetadataPtr meta,
-                                        int *backingFormat,
-                                        char **backingDirectory)
+                                        int *backingFormat)
 {
     char *buf = NULL;
     ssize_t len = VIR_STORAGE_MAX_HEADER;
@@ -1083,7 +1056,7 @@ virStorageFileGetMetadataFromFDInternal(const char *path,
 
     ret = virStorageFileGetMetadataInternal(path, canonPath, directory,
                                             buf, len, format, meta,
-                                            backingFormat, backingDirectory);
+                                            backingFormat);
 
     if (ret == 0) {
         if (S_ISREG(sb.st_mode))
@@ -1126,7 +1099,7 @@ virStorageFileGetMetadataFromFD(const char *path,
         goto cleanup;
     if (virStorageFileGetMetadataFromFDInternal(path, canonPath, ".",
                                                 fd, format, ret,
-                                                NULL, NULL) < 0) {
+                                                NULL) < 0) {
         virStorageFileFreeMetadata(ret);
         ret = NULL;
     }
@@ -1172,8 +1145,7 @@ virStorageFileGetMetadataRecurse(const char *path, const char *canonPath,
         ret = virStorageFileGetMetadataFromFDInternal(path, canonPath,
                                                       directory,
                                                       fd, format, meta,
-                                                      &backingFormat,
-                                                      &backingDirectory);
+                                                      &backingFormat);
 
         if (VIR_CLOSE(fd) < 0)
             VIR_WARN("could not close file %s", path);
@@ -1190,9 +1162,27 @@ virStorageFileGetMetadataRecurse(const char *path, const char *canonPath,
         ret = 0;
     }
 
-    if (ret == 0 && meta->backingStore) {
+    if (ret == 0 && meta->backingStoreRaw) {
         virStorageFileMetadataPtr backing;
 
+        if (virStorageIsFile(meta->backingStoreRaw)) {
+            if (virFindBackingFile(directory,
+                                   meta->backingStoreRaw,
+                                   &backingDirectory,
+                                   &meta->backingStore) < 0) {
+                /* the backing file is (currently) unavailable, treat this
+                 * file as standalone:
+                 * backingStoreRaw is kept to mark broken image chains */
+                VIR_WARN("Backing file '%s' of image '%s' is missing.",
+                         meta->backingStoreRaw, path);
+
+                return 0;
+            }
+        } else {
+            if (VIR_STRDUP(meta->backingStore, meta->backingStoreRaw) < 0)
+                return -1;
+        }
+
         if (backingFormat == VIR_STORAGE_FILE_AUTO && !allow_probe)
             backingFormat = VIR_STORAGE_FILE_RAW;
         else if (backingFormat == VIR_STORAGE_FILE_AUTO_SAFE)