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migration: Unshare MigrationParameters struct for now

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Commit de63ab6 "migrate: Share common MigrationParameters struct"
reused MigrationParameters for the arguments of
migrate-set-parameters, with the following rationale:

    It is rather verbose, and slightly error-prone, to repeat
    the same set of parameters for input (migrate-set-parameters)
    as for output (query-migrate-parameters), where the only
    difference is whether the members are optional.  We can just
    document that the optional members will always be present
    on output, and then share a common struct between both
    commands.  The next patch can then reduce the amount of
    code needed on input.

I need to unshare them to correct a design flaw in a stupid, but
minimally invasive way, in the next commit.  We can restore the
sharing when we redo that patch in a less stupid way.  Add a suitable
TODO comment.

Note that I revert only the sharing part of commit de63ab6, not the
part that made the members of query-migrate-parameters' result
optional.  The schema (and thus introspection) remains inaccurate for
query-migrate-parameters.  If we decide not to restore the sharing, we
should revert that part, too.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Markus Armbruster 2017-07-18 13:42:11 +02:00
parent e87fae4c48
commit 1bda8b3c69
3 changed files with 140 additions and 15 deletions
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4
hmp.c
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@ -1556,7 +1556,7 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
const char *param = qdict_get_str(qdict, "parameter");
const char *valuestr = qdict_get_str(qdict, "value");
Visitor *v = string_input_visitor_new(valuestr);
MigrationParameters *p = g_new0(MigrationParameters, 1);
MigrateSetParameters *p = g_new0(MigrateSetParameters, 1);
uint64_t valuebw = 0;
Error *err = NULL;
int i, ret;
@ -1634,7 +1634,7 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
}
cleanup:
qapi_free_MigrationParameters(p);
qapi_free_MigrateSetParameters(p);
visit_free(v);
if (err) {
error_report_err(err);