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qed: Implement .bdrv_drain

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The "need_check_timer" is used to clear the "NEED_CHECK" flag in the
image header after a grace period once metadata update has finished. In
compliance to the bdrv_drain semantics we should make sure it remains
deleted once .bdrv_drain is called.

We cannot reuse qed_need_check_timer_cb because here it doesn't satisfy
the assertion.  Do the "plug" and "flush" calls manually.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 1447064214-29930-10-git-send-email-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2015-11-09 18:16:54 +08:00 • committed by Kevin Wolf
parent 67da1dc5ce
commit df9a681dc9
7 changed files with 152 additions and 10 deletions
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3
include/block/block_int.h
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@ -693,4 +693,7 @@ void blk_dev_resize_cb(BlockBackend *blk);
void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors);
bool bdrv_requests_pending(BlockDriverState *bs);
void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out);
void bdrv_undo_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *in);
#endif /* BLOCK_INT_H */