[PATCH v7 07/10] parallels: Move check of cluster outside image to a separate function

[Alexander Ivanov]

We will add more and more checks so we need a better code structure
in parallels_co_check. Let each check performs in a separate loop
in a separate helper.

Signed-off-by: Alexander Ivanov <alexander.iva...@virtuozzo.com>
Reviewed-by: Denis V. Lunev <d...@openvz.org>
---
 block/parallels.c | 59 ++++++++++++++++++++++++++++++++++-------------
 1 file changed, 43 insertions(+), 16 deletions(-)

diff --git a/block/parallels.c b/block/parallels.c
index eea318f809..f50cd232aa 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -438,13 +438,50 @@ static void parallels_check_unclean(BlockDriverState *bs,
     }
 }
 
+static int parallels_check_outside_image(BlockDriverState *bs,
+                                         BdrvCheckResult *res,
+                                         BdrvCheckMode fix)
+{
+    BDRVParallelsState *s = bs->opaque;
+    uint32_t i;
+    int64_t off, high_off, size;
+
+    size = bdrv_getlength(bs->file->bs);
+    if (size < 0) {
+        res->check_errors++;
+        return size;
+    }
+
+    high_off = 0;
+    for (i = 0; i < s->bat_size; i++) {
+        off = bat2sect(s, i) << BDRV_SECTOR_BITS;
+        if (off > size) {
+            fprintf(stderr, "%s cluster %u is outside image\n",
+                    fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i);
+            res->corruptions++;
+            if (fix & BDRV_FIX_ERRORS) {
+                parallels_set_bat_entry(s, i, 0);
+                res->corruptions_fixed++;
+            }
+            continue;
+        }
+        if (high_off < off) {
+            high_off = off;
+        }
+    }
+
+    s->data_end = (high_off + s->cluster_size) >> BDRV_SECTOR_BITS;
+
+    return 0;
+}
+
 static int coroutine_fn parallels_co_check(BlockDriverState *bs,
                                            BdrvCheckResult *res,
                                            BdrvCheckMode fix)
 {
     BDRVParallelsState *s = bs->opaque;
     int64_t size, prev_off, high_off;
-    int ret = 0;
+    int ret;
     uint32_t i;
 
     size = bdrv_getlength(bs->file->bs);
@@ -457,6 +494,11 @@ static int coroutine_fn 
parallels_co_check(BlockDriverState *bs,
 
     parallels_check_unclean(bs, res, fix);
 
+    ret = parallels_check_outside_image(bs, res, fix);
+    if (ret < 0) {
+        goto out;
+    }
+
     res->bfi.total_clusters = s->bat_size;
     res->bfi.compressed_clusters = 0; /* compression is not supported */
 
@@ -469,19 +511,6 @@ static int coroutine_fn 
parallels_co_check(BlockDriverState *bs,
             continue;
         }
 
-        /* cluster outside the image */
-        if (off > size) {
-            fprintf(stderr, "%s cluster %u is outside image\n",
-                    fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i);
-            res->corruptions++;
-            if (fix & BDRV_FIX_ERRORS) {
-                parallels_set_bat_entry(s, i, 0);
-                res->corruptions_fixed++;
-            }
-            prev_off = 0;
-            continue;
-        }
-
         res->bfi.allocated_clusters++;
         if (off > high_off) {
             high_off = off;
@@ -519,8 +548,6 @@ static int coroutine_fn parallels_co_check(BlockDriverState 
*bs,
         }
     }
 
-    s->data_end = res->image_end_offset >> BDRV_SECTOR_BITS;
-
 out:
     qemu_co_mutex_unlock(&s->lock);
 
-- 
2.34.1