storage_file_probe: Remove BACKING_STORE_OK,BACKING_STORE_INVALID states

Replace the return values by 0 because none of the callers care and some
of the backing store parser functions return this state also in cases
the rest of the code would consider as success.

Subsequently the parsers will be refactored and proper error reporting
returned.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

diff --git a/src/storage_file/storage_file_probe.c b/src/storage_file/storage_file_probe.c
index 4cf052c03d163eba438e1b00193d0efc2c037311..16298f76c7f4adec5a65153c5320bf0c876ca2f7 100644 (file)
--- a/src/storage_file/storage_file_probe.c
+++ b/src/storage_file/storage_file_probe.c
@@ -43,11 +43,6 @@ enum lv_endian {
     LV_BIG_ENDIAN         /* 4321 */
 };
 
-enum {
-    BACKING_STORE_OK,
-    BACKING_STORE_INVALID,
-};
-
 #define FILE_TYPE_VERSIONS_LAST 3
 
 struct FileEncryptionInfo {
@@ -382,14 +377,14 @@ cowGetBackingStore(char **res,
     *format = VIR_STORAGE_FILE_AUTO;
 
     if (buf_size < 4+4+ COW_FILENAME_MAXLEN)
-        return BACKING_STORE_INVALID;
+        return 0;
     if (buf[4+4] == '\0') { /* cow_header_v2.backing_file[0] */
         *format = VIR_STORAGE_FILE_NONE;
-        return BACKING_STORE_OK;
+        return 0;
     }
 
     *res = g_strndup((const char *)buf + 4 + 4, COW_FILENAME_MAXLEN);
-    return BACKING_STORE_OK;
+    return 0;
 }
 
 
@@ -527,34 +522,34 @@ qcowXGetBackingStore(char **res,
     *format = VIR_STORAGE_FILE_AUTO;
 
     if (buf_size < QCOWX_HDR_BACKING_FILE_OFFSET+8+4)
-        return BACKING_STORE_INVALID;
+        return 0;
 
     offset = virReadBufInt64BE(buf + QCOWX_HDR_BACKING_FILE_OFFSET);
     if (offset > buf_size)
-        return BACKING_STORE_INVALID;
+        return 0;
 
     if (offset == 0) {
         *format = VIR_STORAGE_FILE_NONE;
-        return BACKING_STORE_OK;
+        return 0;
     }
 
     size = virReadBufInt32BE(buf + QCOWX_HDR_BACKING_FILE_SIZE);
     if (size == 0) {
         *format = VIR_STORAGE_FILE_NONE;
-        return BACKING_STORE_OK;
+        return 0;
     }
     if (size > 1023)
-        return BACKING_STORE_INVALID;
+        return 0;
     if (offset + size > buf_size || offset + size < offset)
-        return BACKING_STORE_INVALID;
+        return 0;
     *res = g_new0(char, size + 1);
     memcpy(*res, buf + offset, size);
     (*res)[size] = '\0';
 
     if (qcow2GetExtensions(buf, buf_size, format) < 0)
-        return BACKING_STORE_INVALID;
+        return 0;
 
-    return BACKING_STORE_OK;
+    return 0;
 }
 
 
@@ -582,7 +577,7 @@ vmdk4GetBackingStore(char **res,
     *format = VIR_STORAGE_FILE_AUTO;
 
     if (buf_size <= 0x200)
-        return BACKING_STORE_INVALID;
+        return 0;
 
     len = buf_size - 0x200;
     if (len >= VIR_STORAGE_MAX_HEADER)
@@ -592,21 +587,21 @@ vmdk4GetBackingStore(char **res,
     start = strstr(desc, prefix);
     if (start == NULL) {
         *format = VIR_STORAGE_FILE_NONE;
-        return BACKING_STORE_OK;
+        return 0;
     }
     start += strlen(prefix);
     end = strchr(start, '"');
     if (end == NULL)
-        return BACKING_STORE_INVALID;
+        return 0;
 
     if (end == start) {
         *format = VIR_STORAGE_FILE_NONE;
-        return BACKING_STORE_OK;
+        return 0;
     }
     *end = '\0';
     *res = g_strdup(start);
 
-    return BACKING_STORE_OK;
+    return 0;
 }
 
 static int
@@ -621,24 +616,24 @@ qedGetBackingStore(char **res,
     *res = NULL;
     /* Check if this image has a backing file */
     if (buf_size < QED_HDR_FEATURES_OFFSET+8)
-        return BACKING_STORE_INVALID;
+        return 0;
     flags = virReadBufInt64LE(buf + QED_HDR_FEATURES_OFFSET);
     if (!(flags & QED_F_BACKING_FILE)) {
         *format = VIR_STORAGE_FILE_NONE;
-        return BACKING_STORE_OK;
+        return 0;
     }
 
     /* Parse the backing file */
     if (buf_size < QED_HDR_BACKING_FILE_OFFSET+8)
-        return BACKING_STORE_INVALID;
+        return 0;
     offset = virReadBufInt32LE(buf + QED_HDR_BACKING_FILE_OFFSET);
     if (offset > buf_size)
-        return BACKING_STORE_INVALID;
+        return 0;
     size = virReadBufInt32LE(buf + QED_HDR_BACKING_FILE_SIZE);
     if (size == 0)
-        return BACKING_STORE_OK;
+        return 0;
     if (offset + size > buf_size || offset + size < offset)
-        return BACKING_STORE_INVALID;
+        return 0;
     *res = g_new0(char, size + 1);
     memcpy(*res, buf + offset, size);
     (*res)[size] = '\0';
@@ -648,7 +643,7 @@ qedGetBackingStore(char **res,
     else
         *format = VIR_STORAGE_FILE_AUTO_SAFE;
 
-    return BACKING_STORE_OK;
+    return 0;
 }