block/dirty-bitmap: add bs link

Add bs field to BdrvDirtyBitmap structure. Drop BlockDriverState
parameter from bitmap APIs where possible.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20190916141911.5255-3-vsementsov@virtuozzo.com
[Rebased on top of block-copy. --js]
Signed-off-by: John Snow <jsnow@redhat.com>

5 files changed, 22 insertions, 22 deletions

diff --git a/block/backup.c b/block/backup.c
index 46978c1785..dddcf77f53 100644
--- a/block/backup.c
+++ b/block/backup.c
@@ -98,13 +98,13 @@ static void backup_cleanup_sync_bitmap(BackupBlockJob *job, int ret)
          * We succeeded, or we always intended to sync the bitmap.
          * Delete this bitmap and install the child.
          */
-        bm = bdrv_dirty_bitmap_abdicate(job->source_bs, job->sync_bitmap, NULL);
+        bm = bdrv_dirty_bitmap_abdicate(job->sync_bitmap, NULL);
     } else {
         /*
          * We failed, or we never intended to sync the bitmap anyway.
          * Merge the successor back into the parent, keeping all data.
          */
-        bm = bdrv_reclaim_dirty_bitmap(job->source_bs, job->sync_bitmap, NULL);
+        bm = bdrv_reclaim_dirty_bitmap(job->sync_bitmap, NULL);
     }
 
     assert(bm);
@@ -402,7 +402,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
         }
 
         /* Create a new bitmap, and freeze/disable this one. */
-        if (bdrv_dirty_bitmap_create_successor(bs, sync_bitmap, errp) < 0) {
+        if (bdrv_dirty_bitmap_create_successor(sync_bitmap, errp) < 0) {
             return NULL;
         }
     }
@@ -472,7 +472,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
 
  error:
     if (sync_bitmap) {
-        bdrv_reclaim_dirty_bitmap(bs, sync_bitmap, NULL);
+        bdrv_reclaim_dirty_bitmap(sync_bitmap, NULL);
     }
     if (job) {
         backup_clean(&job->common.job);
diff --git a/block/block-copy.c b/block/block-copy.c
index 0f76ea1e63..066e3a7274 100644
--- a/block/block-copy.c
+++ b/block/block-copy.c
@@ -60,7 +60,7 @@ void block_copy_state_free(BlockCopyState *s)
         return;
     }
 
-    bdrv_release_dirty_bitmap(s->source->bs, s->copy_bitmap);
+    bdrv_release_dirty_bitmap(s->copy_bitmap);
     g_free(s);
 }
 
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 4ecf18d5df..44453ff824 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -30,6 +30,7 @@
 
 struct BdrvDirtyBitmap {
     QemuMutex *mutex;
+    BlockDriverState *bs;
     HBitmap *bitmap;            /* Dirty bitmap implementation */
     bool busy;                  /* Bitmap is busy, it can't be used via QMP */
     BdrvDirtyBitmap *successor; /* Anonymous child, if any. */
@@ -115,6 +116,7 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
         return NULL;
     }
     bitmap = g_new0(BdrvDirtyBitmap, 1);
+    bitmap->bs = bs;
     bitmap->mutex = &bs->dirty_bitmap_mutex;
     bitmap->bitmap = hbitmap_alloc(bitmap_size, ctz32(granularity));
     bitmap->size = bitmap_size;
@@ -237,8 +239,7 @@ int bdrv_dirty_bitmap_check(const BdrvDirtyBitmap *bitmap, uint32_t flags,
  * The successor will be enabled if the parent bitmap was.
  * Called with BQL taken.
  */
-int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs,
-                                       BdrvDirtyBitmap *bitmap, Error **errp)
+int bdrv_dirty_bitmap_create_successor(BdrvDirtyBitmap *bitmap, Error **errp)
 {
     uint64_t granularity;
     BdrvDirtyBitmap *child;
@@ -254,7 +255,7 @@ int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs,
 
     /* Create an anonymous successor */
     granularity = bdrv_dirty_bitmap_granularity(bitmap);
-    child = bdrv_create_dirty_bitmap(bs, granularity, NULL, errp);
+    child = bdrv_create_dirty_bitmap(bitmap->bs, granularity, NULL, errp);
     if (!child) {
         return -1;
     }
@@ -300,8 +301,7 @@ static void bdrv_release_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap)
  * delete the old bitmap, and return a handle to the new bitmap.
  * Called with BQL taken.
  */
-BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
-                                            BdrvDirtyBitmap *bitmap,
+BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BdrvDirtyBitmap *bitmap,
                                             Error **errp)
 {
     char *name;
@@ -320,7 +320,7 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
     successor->persistent = bitmap->persistent;
     bitmap->persistent = false;
     bitmap->busy = false;
-    bdrv_release_dirty_bitmap(bs, bitmap);
+    bdrv_release_dirty_bitmap(bitmap);
 
     return successor;
 }
@@ -332,8 +332,7 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
  * The marged parent will be enabled if and only if the successor was enabled.
  * Called within bdrv_dirty_bitmap_lock..unlock and with BQL taken.
  */
-BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState *bs,
-                                                  BdrvDirtyBitmap *parent,
+BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BdrvDirtyBitmap *parent,
                                                   Error **errp)
 {
     BdrvDirtyBitmap *successor = parent->successor;
@@ -357,14 +356,13 @@ BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState *bs,
 }
 
 /* Called with BQL taken. */
-BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs,
-                                           BdrvDirtyBitmap *parent,
+BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BdrvDirtyBitmap *parent,
                                            Error **errp)
 {
     BdrvDirtyBitmap *ret;
 
     qemu_mutex_lock(parent->mutex);
-    ret = bdrv_reclaim_dirty_bitmap_locked(bs, parent, errp);
+    ret = bdrv_reclaim_dirty_bitmap_locked(parent, errp);
     qemu_mutex_unlock(parent->mutex);
 
     return ret;
@@ -390,8 +388,10 @@ void bdrv_dirty_bitmap_truncate(BlockDriverState *bs, int64_t bytes)
 }
 
 /* Called with BQL taken.  */
-void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
+void bdrv_release_dirty_bitmap(BdrvDirtyBitmap *bitmap)
 {
+    BlockDriverState *bs = bitmap->bs;
+
     bdrv_dirty_bitmaps_lock(bs);
     bdrv_release_dirty_bitmap_locked(bitmap);
     bdrv_dirty_bitmaps_unlock(bs);
diff --git a/block/mirror.c b/block/mirror.c
index fe984efb90..a6c50caea4 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -638,7 +638,7 @@ static int mirror_exit_common(Job *job)
         bdrv_unfreeze_backing_chain(mirror_top_bs, target_bs);
     }
 
-    bdrv_release_dirty_bitmap(src, s->dirty_bitmap);
+    bdrv_release_dirty_bitmap(s->dirty_bitmap);
 
     /* Make sure that the source BDS doesn't go away during bdrv_replace_node,
      * before we can call bdrv_drained_end */
@@ -1709,7 +1709,7 @@ fail:
         blk_unref(s->target);
         bs_opaque->job = NULL;
         if (s->dirty_bitmap) {
-            bdrv_release_dirty_bitmap(bs, s->dirty_bitmap);
+            bdrv_release_dirty_bitmap(s->dirty_bitmap);
         }
         job_early_fail(&s->common.job);
     }
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index 644837eb03..687087d2bc 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -374,7 +374,7 @@ static BdrvDirtyBitmap *load_bitmap(BlockDriverState *bs,
 fail:
     g_free(bitmap_table);
     if (bitmap != NULL) {
-        bdrv_release_dirty_bitmap(bs, bitmap);
+        bdrv_release_dirty_bitmap(bitmap);
     }
 
     return NULL;
@@ -941,7 +941,7 @@ fail:
 static void release_dirty_bitmap_helper(gpointer bitmap,
                                         gpointer bs)
 {
-    bdrv_release_dirty_bitmap(bs, bitmap);
+    bdrv_release_dirty_bitmap(bitmap);
 }
 
 /* for g_slist_foreach for GSList of BdrvDirtyBitmap* elements */
@@ -1577,7 +1577,7 @@ void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, Error **errp)
             continue;
         }
 
-        bdrv_release_dirty_bitmap(bs, bm->dirty_bitmap);
+        bdrv_release_dirty_bitmap(bm->dirty_bitmap);
     }
 
     bitmap_list_free(bm_list);