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[Qemu-devel] [PATCH v2 07/18] block: Clean up a misuse of qobject_to() i
From: |
Markus Armbruster |
Subject: |
[Qemu-devel] [PATCH v2 07/18] block: Clean up a misuse of qobject_to() in .bdrv_co_create_opts() |
Date: |
Thu, 14 Jun 2018 21:14:32 +0200 |
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 <address@hidden>
Reviewed-by: Kevin Wolf <address@hidden>
---
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 695899fc4b..ceb7a15d62 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -616,7 +616,7 @@ 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;
@@ -654,14 +654,13 @@ 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 860b058240..2f81f081fd 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -946,7 +946,7 @@ 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;
@@ -998,14 +998,13 @@ 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 0a27afa2ef..8c338661db 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3080,7 +3080,7 @@ 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;
@@ -3153,14 +3153,13 @@ 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 88fa36d409..fcec760b26 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 78b29d9fc7..f2aec3d2cd 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1965,7 +1965,7 @@ 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;
@@ -2006,14 +2006,13 @@ 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 16178e5a90..a9bb04149d 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);
--
2.17.1
- [Qemu-devel] [PATCH v2 02/18] iscsi: Drop deprecated -drive parameter "filename", (continued)
- [Qemu-devel] [PATCH v2 02/18] iscsi: Drop deprecated -drive parameter "filename", Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 14/18] check-block-qdict: Rename qdict_flatten()'s variables for clarity, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 09/18] block: Make remaining uses of qobject input visitor more robust, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 11/18] block-qdict: Tweak qdict_flatten_qdict(), qdict_flatten_qlist(), Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 18/18] rbd: New parameter key-secret, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 03/18] block: Add block-specific QDict header, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 13/18] block-qdict: Simplify qdict_is_list() some, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 15/18] check-block-qdict: Cover flattening of empty lists and dictionaries, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 10/18] block-qdict: Simplify qdict_flatten_qdict(), Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 07/18] block: Clean up a misuse of qobject_to() in .bdrv_co_create_opts(),
Markus Armbruster <=
- [Qemu-devel] [PATCH v2 08/18] block: Factor out qobject_input_visitor_new_flat_confused(), Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 16/18] block: Fix -blockdev / blockdev-add for empty objects and arrays, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 17/18] rbd: New parameter auth-client-required, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 06/18] block: Fix -drive for certain non-string scalars, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 05/18] block: Fix -blockdev for certain non-string scalars, Markus Armbruster, 2018/06/14
- [Qemu-devel] [PATCH v2 04/18] qobject: Move block-specific qdict code to block-qdict.c, Markus Armbruster, 2018/06/14
- Re: [Qemu-devel] [PATCH v2 00/18] block: Configuration fixes and rbd authentication, Kevin Wolf, 2018/06/15