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From 096bb1ca93a22a0ca874b76c3ad03385a5667f41 Mon Sep 17 00:00:00 2001
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From: Markus Armbruster <armbru@redhat.com>
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Date: Mon, 18 Jun 2018 08:43:24 +0200
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Subject: [PATCH 17/54] block-qdict: Clean up qdict_crumple() a bit
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RH-Author: Markus Armbruster <armbru@redhat.com>
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Message-id: <20180618084330.30009-18-armbru@redhat.com>
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Patchwork-id: 80729
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O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH 17/23] block-qdict: Clean up qdict_crumple() a bit
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Bugzilla: 1557995
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Jeffrey Cody <jcody@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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When you mix scalar and non-scalar keys, whether you get an "already
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set as scalar" or an "already set as dict" error depends on qdict
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iteration order. Neither message makes much sense. Replace by
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""Cannot mix scalar and non-scalar keys". This is similar to the
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message we get for mixing list and non-list keys.
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I find qdict_crumple()'s first loop hard to understand. Rearrange it
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and add a comment.
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Signed-off-by: Markus Armbruster <armbru@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 3692b5d76819e573dedc9004c4b2b0e3dad83530)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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qobject/block-qdict.c | 32 ++++++++++++++++----------------
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1 file changed, 16 insertions(+), 16 deletions(-)
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diff --git a/qobject/block-qdict.c b/qobject/block-qdict.c
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index a4e1c8d..36cf58a 100644
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--- a/qobject/block-qdict.c
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+++ b/qobject/block-qdict.c
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@@ -403,7 +403,7 @@ static int qdict_is_list(QDict *maybe_list, Error **errp)
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QObject *qdict_crumple(const QDict *src, Error **errp)
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{
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const QDictEntry *ent;
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- QDict *two_level, *multi_level = NULL;
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+ QDict *two_level, *multi_level = NULL, *child_dict;
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QObject *dst = NULL, *child;
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size_t i;
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char *prefix = NULL;
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@@ -422,28 +422,28 @@ QObject *qdict_crumple(const QDict *src, Error **errp)
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}
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qdict_split_flat_key(ent->key, &prefix, &suffix);
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-
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child = qdict_get(two_level, prefix);
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+ child_dict = qobject_to(QDict, child);
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+
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+ if (child) {
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+ /*
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+ * If @child_dict, then all previous keys with this prefix
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+ * had a suffix. If @suffix, this one has one as well,
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+ * and we're good, else there's a clash.
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+ */
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+ if (!child_dict || !suffix) {
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+ error_setg(errp, "Cannot mix scalar and non-scalar keys");
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+ goto error;
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+ }
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+ }
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+
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if (suffix) {
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- QDict *child_dict = qobject_to(QDict, child);
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if (!child_dict) {
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- if (child) {
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- error_setg(errp, "Key %s prefix is already set as a scalar",
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- prefix);
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- goto error;
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- }
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-
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child_dict = qdict_new();
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- qdict_put_obj(two_level, prefix, QOBJECT(child_dict));
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+ qdict_put(two_level, prefix, child_dict);
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}
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-
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qdict_put_obj(child_dict, suffix, qobject_ref(ent->value));
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} else {
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- if (child) {
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- error_setg(errp, "Key %s prefix is already set as a dict",
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- prefix);
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- goto error;
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- }
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qdict_put_obj(two_level, prefix, qobject_ref(ent->value));
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}
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--
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1.8.3.1
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