On Fri, Mar 08, 2019 at 12:05:09AM -0600, Eric Blake wrote:
Wire up support for VIR_DOMAIN_SNAPSHOT_LIST_TOPOLOGICAL in the
domain-agnostic support code.

Clients of snapshot_conf were previously getting a depth-first search
on anything that used virDomainSnapshotForEachDescendant(); but a
switch to a breadth-first search will give a topological search.

With that change, we now always have a topological sort for
virDomainSnapshotListAllChildren(); then with one more tweak, we
can get a topological rather than a faster random hash visit
for virDomainListAllSnapshots().

Note that virDomainSnapshotForEach() still uses a random hash
visit; we could change that signature to take a tri-state for
random, depth-first, or breadth-first visit if we ever had clients
that cared about the distinctions, but for now, none of the
drivers seem to care.

Signed-off-by: Eric Blake <ebl...@redhat.com>
---
src/conf/snapshot_conf.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)


Reviewed-by: Ján Tomko <jto...@redhat.com>

Jano

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