From 9cc36895f5a773ac65abedd6b56748c8e15d2eaf Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Mon, 18 Jun 2018 08:43:19 +0200 Subject: [PATCH 021/268] block: Clean up a misuse of qobject_to() in .bdrv_co_create_opts() RH-Author: Markus Armbruster Message-id: <20180618084330.30009-13-armbru@redhat.com> Patchwork-id: 80733 O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH 12/23] block: Clean up a misuse of qobject_to() in .bdrv_co_create_opts() Bugzilla: 1557995 RH-Acked-by: Max Reitz RH-Acked-by: Jeffrey Cody RH-Acked-by: Kevin Wolf The following pattern occurs in the .bdrv_co_create_opts() methods of parallels, qcow, qcow2, qed, vhdx and vpc: qobj = qdict_crumple_for_keyval_qiv(qdict, errp); qobject_unref(qdict); qdict = qobject_to(QDict, qobj); if (qdict == NULL) { ret = -EINVAL; goto done; } v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); [...] ret = 0; done: qobject_unref(qdict); [...] return ret; If qobject_to() fails, we return failure without setting errp. That's wrong. As far as I can tell, it cannot fail here. Clean it up anyway, by removing the useless conversion. Signed-off-by: Markus Armbruster Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf (cherry picked from commit 92adf9dbcd3cf9cedddae995b04a99f5c42ae08c) Signed-off-by: Miroslav Rezanina --- block/parallels.c | 9 ++++----- block/qcow.c | 9 ++++----- block/qcow2.c | 9 ++++----- block/qed.c | 9 ++++----- block/vhdx.c | 9 ++++----- block/vpc.c | 9 ++++----- 6 files changed, 24 insertions(+), 30 deletions(-) diff --git a/block/parallels.c b/block/parallels.c index aa58955..1c96c39 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -614,7 +614,7 @@ static int coroutine_fn parallels_co_create_opts(const char *filename, BlockdevCreateOptions *create_options = NULL; Error *local_err = NULL; BlockDriverState *bs = NULL; - QDict *qdict = NULL; + QDict *qdict; QObject *qobj; Visitor *v; int ret; @@ -652,14 +652,13 @@ static int coroutine_fn parallels_co_create_opts(const char *filename, qdict_put_str(qdict, "file", bs->node_name); qobj = qdict_crumple_for_keyval_qiv(qdict, errp); - qobject_unref(qdict); - qdict = qobject_to(QDict, qobj); - if (qdict == NULL) { + if (!qobj) { ret = -EINVAL; goto done; } - v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); + v = qobject_input_visitor_new_keyval(qobj); + qobject_unref(qobj); visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err); visit_free(v); diff --git a/block/qcow.c b/block/qcow.c index 14b7296..43a595a 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -944,7 +944,7 @@ static int coroutine_fn qcow_co_create_opts(const char *filename, { BlockdevCreateOptions *create_options = NULL; BlockDriverState *bs = NULL; - QDict *qdict = NULL; + QDict *qdict; QObject *qobj; Visitor *v; const char *val; @@ -996,14 +996,13 @@ static int coroutine_fn qcow_co_create_opts(const char *filename, qdict_put_str(qdict, "file", bs->node_name); qobj = qdict_crumple_for_keyval_qiv(qdict, errp); - qobject_unref(qdict); - qdict = qobject_to(QDict, qobj); - if (qdict == NULL) { + if (!qobj) { ret = -EINVAL; goto fail; } - v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); + v = qobject_input_visitor_new_keyval(qobj); + qobject_unref(qobj); visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err); visit_free(v); diff --git a/block/qcow2.c b/block/qcow2.c index fa06b41..ede52a8 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3067,7 +3067,7 @@ static int coroutine_fn qcow2_co_create_opts(const char *filename, QemuOpts *opt Error **errp) { BlockdevCreateOptions *create_options = NULL; - QDict *qdict = NULL; + QDict *qdict; QObject *qobj; Visitor *v; BlockDriverState *bs = NULL; @@ -3140,14 +3140,13 @@ static int coroutine_fn qcow2_co_create_opts(const char *filename, QemuOpts *opt /* Now get the QAPI type BlockdevCreateOptions */ qobj = qdict_crumple_for_keyval_qiv(qdict, errp); - qobject_unref(qdict); - qdict = qobject_to(QDict, qobj); - if (qdict == NULL) { + if (!qobj) { ret = -EINVAL; goto finish; } - v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); + v = qobject_input_visitor_new_keyval(qobj); + qobject_unref(qobj); visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err); visit_free(v); diff --git a/block/qed.c b/block/qed.c index d8810f5..3818888 100644 --- a/block/qed.c +++ b/block/qed.c @@ -722,7 +722,7 @@ static int coroutine_fn bdrv_qed_co_create_opts(const char *filename, Error **errp) { BlockdevCreateOptions *create_options = NULL; - QDict *qdict = NULL; + QDict *qdict; QObject *qobj; Visitor *v; BlockDriverState *bs = NULL; @@ -764,14 +764,13 @@ static int coroutine_fn bdrv_qed_co_create_opts(const char *filename, qdict_put_str(qdict, "file", bs->node_name); qobj = qdict_crumple_for_keyval_qiv(qdict, errp); - qobject_unref(qdict); - qdict = qobject_to(QDict, qobj); - if (qdict == NULL) { + if (!qobj) { ret = -EINVAL; goto fail; } - v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); + v = qobject_input_visitor_new_keyval(qobj); + qobject_unref(qobj); visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err); visit_free(v); diff --git a/block/vhdx.c b/block/vhdx.c index 32939c4..728d8b3 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -1963,7 +1963,7 @@ static int coroutine_fn vhdx_co_create_opts(const char *filename, Error **errp) { BlockdevCreateOptions *create_options = NULL; - QDict *qdict = NULL; + QDict *qdict; QObject *qobj; Visitor *v; BlockDriverState *bs = NULL; @@ -2004,14 +2004,13 @@ static int coroutine_fn vhdx_co_create_opts(const char *filename, qdict_put_str(qdict, "file", bs->node_name); qobj = qdict_crumple_for_keyval_qiv(qdict, errp); - qobject_unref(qdict); - qdict = qobject_to(QDict, qobj); - if (qdict == NULL) { + if (!qobj) { ret = -EINVAL; goto fail; } - v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); + v = qobject_input_visitor_new_keyval(qobj); + qobject_unref(qobj); visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err); visit_free(v); diff --git a/block/vpc.c b/block/vpc.c index 16178e5..a9bb041 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -1081,7 +1081,7 @@ static int coroutine_fn vpc_co_create_opts(const char *filename, QemuOpts *opts, Error **errp) { BlockdevCreateOptions *create_options = NULL; - QDict *qdict = NULL; + QDict *qdict; QObject *qobj; Visitor *v; BlockDriverState *bs = NULL; @@ -1120,14 +1120,13 @@ static int coroutine_fn vpc_co_create_opts(const char *filename, qdict_put_str(qdict, "file", bs->node_name); qobj = qdict_crumple_for_keyval_qiv(qdict, errp); - qobject_unref(qdict); - qdict = qobject_to(QDict, qobj); - if (qdict == NULL) { + if (!qobj) { ret = -EINVAL; goto fail; } - v = qobject_input_visitor_new_keyval(QOBJECT(qdict)); + v = qobject_input_visitor_new_keyval(qobj); + qobject_unref(qobj); visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err); visit_free(v); -- 1.8.3.1