From: Benoît Canet <ben...@irqsave.net> In some setups many backing files and snapshot are chained. This lead to the formation of huge trees of snapshots all depending on a common ancestor.
Hence if something bad happen to this common ancestor all the snapshot of the tree will be broken. This patch add an easy way for the user to monitor backing file ancestors count and take the good decision (streaming). Benoît Canet (3): block: Add bdrv_are_busy() qerror: Add error telling that block dev usage prevents migration migration: block migration when any of the block device is busy block.c | 13 +++++++++++++ block.h | 2 ++ migration.c | 5 +++++ qerror.c | 4 ++++ qerror.h | 3 +++ 5 files changed, 27 insertions(+) -- 1.7.9.5
