[PATCH v5 1/5] replication: Remove s->active_disk

[Lukas Straub]

s->active_disk is bs->file. Remove it and use local variables instead.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 block/replication.c | 34 +++++++++++++++++-----------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/block/replication.c b/block/replication.c
index 774e15df16..9ad2dfdc69 100644
--- a/block/replication.c
+++ b/block/replication.c
@@ -35,7 +35,6 @@ typedef enum {
 typedef struct BDRVReplicationState {
     ReplicationMode mode;
     ReplicationStage stage;
-    BdrvChild *active_disk;
     BlockJob *commit_job;
     BdrvChild *hidden_disk;
     BdrvChild *secondary_disk;
@@ -307,8 +306,10 @@ out:
     return ret;
 }

-static void secondary_do_checkpoint(BDRVReplicationState *s, Error **errp)
+static void secondary_do_checkpoint(BlockDriverState *bs, Error **errp)
 {
+    BDRVReplicationState *s = bs->opaque;
+    BdrvChild *active_disk = bs->file;
     Error *local_err = NULL;
     int ret;

@@ -323,13 +324,13 @@ static void secondary_do_checkpoint(BDRVReplicationState 
*s, Error **errp)
         return;
     }

-    if (!s->active_disk->bs->drv) {
+    if (!active_disk->bs->drv) {
         error_setg(errp, "Active disk %s is ejected",
-                   s->active_disk->bs->node_name);
+                   active_disk->bs->node_name);
         return;
     }

-    ret = bdrv_make_empty(s->active_disk, errp);
+    ret = bdrv_make_empty(active_disk, errp);
     if (ret < 0) {
         return;
     }
@@ -458,6 +459,7 @@ static void replication_start(ReplicationState *rs, 
ReplicationMode mode,
     BlockDriverState *bs = rs->opaque;
     BDRVReplicationState *s;
     BlockDriverState *top_bs;
+    BdrvChild *active_disk;
     int64_t active_length, hidden_length, disk_length;
     AioContext *aio_context;
     Error *local_err = NULL;
@@ -495,15 +497,14 @@ static void replication_start(ReplicationState *rs, 
ReplicationMode mode,
     case REPLICATION_MODE_PRIMARY:
         break;
     case REPLICATION_MODE_SECONDARY:
-        s->active_disk = bs->file;
-        if (!s->active_disk || !s->active_disk->bs ||
-                                    !s->active_disk->bs->backing) {
+        active_disk = bs->file;
+        if (!active_disk || !active_disk->bs || !active_disk->bs->backing) {
             error_setg(errp, "Active disk doesn't have backing file");
             aio_context_release(aio_context);
             return;
         }

-        s->hidden_disk = s->active_disk->bs->backing;
+        s->hidden_disk = active_disk->bs->backing;
         if (!s->hidden_disk->bs || !s->hidden_disk->bs->backing) {
             error_setg(errp, "Hidden disk doesn't have backing file");
             aio_context_release(aio_context);
@@ -518,7 +519,7 @@ static void replication_start(ReplicationState *rs, 
ReplicationMode mode,
         }

         /* verify the length */
-        active_length = bdrv_getlength(s->active_disk->bs);
+        active_length = bdrv_getlength(active_disk->bs);
         hidden_length = bdrv_getlength(s->hidden_disk->bs);
         disk_length = bdrv_getlength(s->secondary_disk->bs);
         if (active_length < 0 || hidden_length < 0 || disk_length < 0 ||
@@ -530,9 +531,9 @@ static void replication_start(ReplicationState *rs, 
ReplicationMode mode,
         }

         /* Must be true, or the bdrv_getlength() calls would have failed */
-        assert(s->active_disk->bs->drv && s->hidden_disk->bs->drv);
+        assert(active_disk->bs->drv && s->hidden_disk->bs->drv);

-        if (!s->active_disk->bs->drv->bdrv_make_empty ||
+        if (!active_disk->bs->drv->bdrv_make_empty ||
             !s->hidden_disk->bs->drv->bdrv_make_empty) {
             error_setg(errp,
                        "Active disk or hidden disk doesn't support 
make_empty");
@@ -586,7 +587,7 @@ static void replication_start(ReplicationState *rs, 
ReplicationMode mode,
     s->stage = BLOCK_REPLICATION_RUNNING;

     if (s->mode == REPLICATION_MODE_SECONDARY) {
-        secondary_do_checkpoint(s, errp);
+        secondary_do_checkpoint(bs, errp);
     }

     s->error = 0;
@@ -615,7 +616,7 @@ static void replication_do_checkpoint(ReplicationState *rs, 
Error **errp)
     }

     if (s->mode == REPLICATION_MODE_SECONDARY) {
-        secondary_do_checkpoint(s, errp);
+        secondary_do_checkpoint(bs, errp);
     }
     aio_context_release(aio_context);
 }
@@ -652,7 +653,6 @@ static void replication_done(void *opaque, int ret)
     if (ret == 0) {
         s->stage = BLOCK_REPLICATION_DONE;

-        s->active_disk = NULL;
         s->secondary_disk = NULL;
         s->hidden_disk = NULL;
         s->error = 0;
@@ -705,7 +705,7 @@ static void replication_stop(ReplicationState *rs, bool 
failover, Error **errp)
         }

         if (!failover) {
-            secondary_do_checkpoint(s, errp);
+            secondary_do_checkpoint(bs, errp);
             s->stage = BLOCK_REPLICATION_DONE;
             aio_context_release(aio_context);
             return;
@@ -713,7 +713,7 @@ static void replication_stop(ReplicationState *rs, bool 
failover, Error **errp)

         s->stage = BLOCK_REPLICATION_FAILOVER;
         s->commit_job = commit_active_start(
-                            NULL, s->active_disk->bs, s->secondary_disk->bs,
+                            NULL, bs->file->bs, s->secondary_disk->bs,
                             JOB_INTERNAL, 0, BLOCKDEV_ON_ERROR_REPORT,
                             NULL, replication_done, bs, true, errp);
         break;
--
2.20.1

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