Using qemu_opts_absorb_qdict, and then checking for any leftover options,
is redundant because there is already a function that does the same,
qemu_opts_from_qdict. qemu_opts_from_qdict consumes the whole dictionary
and therefore can just return an error message if an option fails to validate.
This also fixes a bug, because the "id" entry was retrieved in
qemu_config_do_parse and then left there by qemu_opts_absorb_qdict.
As a result, it was reported as an unrecognized option.
Reported-by: Markus Armbruster <armbru@redhat.com>
Fixes: 3770141139 ("qemu-config: parse configuration files to a QDict")
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
util/qemu-config.c | 17 +----------------
1 file changed, 1 insertion(+), 16 deletions(-)
diff --git a/util/qemu-config.c b/util/qemu-config.c
index 374f3bc460..84ee6dc4ea 100644
--- a/util/qemu-config.c
+++ b/util/qemu-config.c
@@ -429,29 +429,14 @@ out:
void qemu_config_do_parse(const char *group, QDict *qdict, void *opaque, Error **errp)
{
QemuOptsList **lists = opaque;
- const char *id = qdict_get_try_str(qdict, "id");
QemuOptsList *list;
- QemuOpts *opts;
- const QDictEntry *unrecognized;
list = find_list(lists, group, errp);
if (!list) {
return;
}
- opts = qemu_opts_create(list, id, 1, errp);
- if (!opts) {
- return;
- }
- if (!qemu_opts_absorb_qdict(opts, qdict, errp)) {
- qemu_opts_del(opts);
- return;
- }
- unrecognized = qdict_first(qdict);
- if (unrecognized) {
- error_setg(errp, QERR_INVALID_PARAMETER, unrecognized->key);
- qemu_opts_del(opts);
- }
+ qemu_opts_from_qdict(list, qdict, errp);
}
int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error **errp)
--
2.31.1
On 6/9/21 2:39 PM, Paolo Bonzini wrote: > Using qemu_opts_absorb_qdict, and then checking for any leftover options, > is redundant because there is already a function that does the same, > qemu_opts_from_qdict. qemu_opts_from_qdict consumes the whole dictionary > and therefore can just return an error message if an option fails to validate. > > This also fixes a bug, because the "id" entry was retrieved in > qemu_config_do_parse and then left there by qemu_opts_absorb_qdict. > As a result, it was reported as an unrecognized option. > > Reported-by: Markus Armbruster <armbru@redhat.com> > Fixes: 3770141139 ("qemu-config: parse configuration files to a QDict") > Cc: qemu-stable@nongnu.org > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> > --- > util/qemu-config.c | 17 +---------------- > 1 file changed, 1 insertion(+), 16 deletions(-) > > diff --git a/util/qemu-config.c b/util/qemu-config.c > index 374f3bc460..84ee6dc4ea 100644 > --- a/util/qemu-config.c > +++ b/util/qemu-config.c > @@ -429,29 +429,14 @@ out: > void qemu_config_do_parse(const char *group, QDict *qdict, void *opaque, Error **errp) > { > QemuOptsList **lists = opaque; > - const char *id = qdict_get_try_str(qdict, "id"); > QemuOptsList *list; > - QemuOpts *opts; > - const QDictEntry *unrecognized; > > list = find_list(lists, group, errp); > if (!list) { > return; > } > Matter of taste I'd have inverted the if statement, but it fixes my problem, so thanks! Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> > + qemu_opts_from_qdict(list, qdict, errp); > } > > int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error **errp) >
Paolo Bonzini <pbonzini@redhat.com> writes: > Using qemu_opts_absorb_qdict, and then checking for any leftover options, > is redundant because there is already a function that does the same, > qemu_opts_from_qdict. qemu_opts_from_qdict consumes the whole dictionary > and therefore can just return an error message if an option fails to validate. I missed this when I reviewed the series... > This also fixes a bug, because the "id" entry was retrieved in > qemu_config_do_parse and then left there by qemu_opts_absorb_qdict. > As a result, it was reported as an unrecognized option. > > Reported-by: Markus Armbruster <armbru@redhat.com> > Fixes: 3770141139 ("qemu-config: parse configuration files to a QDict") > Cc: qemu-stable@nongnu.org > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> > --- > util/qemu-config.c | 17 +---------------- > 1 file changed, 1 insertion(+), 16 deletions(-) > > diff --git a/util/qemu-config.c b/util/qemu-config.c > index 374f3bc460..84ee6dc4ea 100644 > --- a/util/qemu-config.c > +++ b/util/qemu-config.c > @@ -429,29 +429,14 @@ out: > void qemu_config_do_parse(const char *group, QDict *qdict, void *opaque, Error **errp) > { > QemuOptsList **lists = opaque; > - const char *id = qdict_get_try_str(qdict, "id"); > QemuOptsList *list; > - QemuOpts *opts; > - const QDictEntry *unrecognized; > > list = find_list(lists, group, errp); > if (!list) { > return; > } > > - opts = qemu_opts_create(list, id, 1, errp); > - if (!opts) { > - return; > - } > - if (!qemu_opts_absorb_qdict(opts, qdict, errp)) { > - qemu_opts_del(opts); > - return; > - } > - unrecognized = qdict_first(qdict); > - if (unrecognized) { > - error_setg(errp, QERR_INVALID_PARAMETER, unrecognized->key); > - qemu_opts_del(opts); > - } > + qemu_opts_from_qdict(list, qdict, errp); > } > > int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname, Error **errp) Creation of @opts is now in qemu_opts_from_qdict(). Works the same as before. Good. Let's compare the remainder. Before the patch: qemu_opts_absorb_qdict() absorbs entries with keys the QemuOpts accepts. It either accepts a (non-empty) list of keys, or any key. It fails when any of the absorbed entries fails qemu_opts_from_qdict_entry(). qemu_config_do_parse() additionally fails when unabsorbed keys remain. After the patch: qemu_opts_from_qdict() feeds all entries to qemu_opts_from_qdict_entry(). Which silently ignores entry "id", and fails for keys the QemuOpts doesn't accept. Good. The part 'ignores entry "id"' fixes the bug. Reviewed-by: Markus Armbruster <armbru@redhat.com> Tangent: we silently ignore entries whose value is a QTYPE_QNULL, QTYPE_QDICT, or QTYPE_QLIST, because qemu_opts_from_qdict_entry() does. Not changed by this patch, I believe.
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