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authorKevin Wolf <kwolf@redhat.com>2017-09-14 14:53:46 +0200
committerKevin Wolf <kwolf@redhat.com>2017-09-26 14:46:23 +0200
commit1857c97b76af02537b954c86dab066503950a4fd (patch)
treee0076a5d3a30fb32f084939b871816005a465542 /block.c
parent148eb13c84cccd0eedd6e59f90e0151bd7bac9fa (diff)
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block: reopen: Queue children after their parents
We will calculate the required new permissions in the prepare stage of a reopen. Required permissions of children can be influenced by the changes made to their parents, but parents are independent from their children. This means that permissions need to be calculated top-down. In order to achieve this, queue parents before their children rather than queuing the children first. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'block.c')
-rw-r--r--block.c26
1 files changed, 13 insertions, 13 deletions
diff --git a/block.c b/block.c
index ed8d51d..204cbb4 100644
--- a/block.c
+++ b/block.c
@@ -2768,6 +2768,19 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue,
flags |= BDRV_O_ALLOW_RDWR;
}
+ if (!bs_entry) {
+ bs_entry = g_new0(BlockReopenQueueEntry, 1);
+ QSIMPLEQ_INSERT_TAIL(bs_queue, bs_entry, entry);
+ } else {
+ QDECREF(bs_entry->state.options);
+ QDECREF(bs_entry->state.explicit_options);
+ }
+
+ bs_entry->state.bs = bs;
+ bs_entry->state.options = options;
+ bs_entry->state.explicit_options = explicit_options;
+ bs_entry->state.flags = flags;
+
QLIST_FOREACH(child, &bs->children, next) {
QDict *new_child_options;
char *child_key_dot;
@@ -2787,19 +2800,6 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue,
child->role, options, flags);
}
- if (!bs_entry) {
- bs_entry = g_new0(BlockReopenQueueEntry, 1);
- QSIMPLEQ_INSERT_TAIL(bs_queue, bs_entry, entry);
- } else {
- QDECREF(bs_entry->state.options);
- QDECREF(bs_entry->state.explicit_options);
- }
-
- bs_entry->state.bs = bs;
- bs_entry->state.options = options;
- bs_entry->state.explicit_options = explicit_options;
- bs_entry->state.flags = flags;
-
return bs_queue;
}