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block: Avoid bs->blk in bdrv_next()

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We need to introduce a separate BdrvNextIterator struct that can keep
more state than just the current BDS in order to avoid using the bs->blk
pointer.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2016-03-22 18:58:50 +01:00
parent dde33812a8
commit 7c8eece45b
10 changed files with 103 additions and 76 deletions
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3
blockdev.c
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@ -4135,8 +4135,9 @@ BlockJobInfoList *qmp_query_block_jobs(Error **errp)
{
BlockJobInfoList *head = NULL, **p_next = &head;
BlockDriverState *bs;
BdrvNextIterator *it = NULL;
for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
while ((it = bdrv_next(it, &bs))) {
AioContext *aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);