error: Eliminate error_propagate() with Coccinelle, part 2
When all we do with an Error we receive into a local variable is
propagating to somewhere else, we can just as well receive it there
right away. The previous commit did that with a Coccinelle script I
consider fairly trustworthy. This commit uses the same script with
the matching of return taken out, i.e. we convert
if (!foo(..., &err)) {
...
error_propagate(errp, err);
...
}
to
if (!foo(..., errp)) {
...
...
}
This is unsound: @err could still be read between afterwards. I don't
know how to express "no read of @err without an intervening write" in
Coccinelle. Instead, I manually double-checked for uses of @err.
Suboptimal line breaks tweaked manually. qdev_realize() simplified
further to placate scripts/checkpatch.pl.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200707160613.848843-36-armbru@redhat.com>
diff --git a/block.c b/block.c
index 99fe572..ef781f8 100644
--- a/block.c
+++ b/block.c
@@ -1629,8 +1629,7 @@
assert(options != NULL && bs->options != options);
opts = qemu_opts_create(&bdrv_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto fail_opts;
}
@@ -4090,8 +4089,7 @@
/* Process generic block layer options */
opts = qemu_opts_create(&bdrv_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, reopen_state->options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, reopen_state->options, errp)) {
ret = -EINVAL;
goto error;
}
diff --git a/block/blkdebug.c b/block/blkdebug.c
index 3c0a9d4..9c08d8a 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -359,7 +359,6 @@
QObject *crumpled_subqdict = NULL;
Visitor *v = NULL;
BlockPermissionList *perm_list = NULL, *element;
- Error *local_err = NULL;
*dest = 0;
@@ -375,8 +374,7 @@
}
v = qobject_input_visitor_new(crumpled_subqdict);
- if (!visit_type_BlockPermissionList(v, NULL, &perm_list, &local_err)) {
- error_propagate(errp, local_err);
+ if (!visit_type_BlockPermissionList(v, NULL, &perm_list, errp)) {
ret = -EINVAL;
goto out;
}
@@ -471,8 +469,7 @@
uint64_t align;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto out;
}
diff --git a/block/blklogwrites.c b/block/blklogwrites.c
index 0c93e92..57315f5 100644
--- a/block/blklogwrites.c
+++ b/block/blklogwrites.c
@@ -149,9 +149,8 @@
bool log_append;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
- error_propagate(errp, local_err);
goto fail;
}
diff --git a/block/blkverify.c b/block/blkverify.c
index 666d626..4aed53a 100644
--- a/block/blkverify.c
+++ b/block/blkverify.c
@@ -116,8 +116,7 @@
int ret;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto fail;
}
diff --git a/block/crypto.c b/block/crypto.c
index 35aa594..8725c1b 100644
--- a/block/crypto.c
+++ b/block/crypto.c
@@ -260,7 +260,6 @@
{
BlockCrypto *crypto = bs->opaque;
QemuOpts *opts = NULL;
- Error *local_err = NULL;
int ret = -EINVAL;
QCryptoBlockOpenOptions *open_opts = NULL;
unsigned int cflags = 0;
@@ -276,8 +275,7 @@
bs->file->bs->supported_write_flags;
opts = qemu_opts_create(opts_spec, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
goto cleanup;
}
diff --git a/block/file-posix.c b/block/file-posix.c
index b35ea99..1989eae 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -490,8 +490,7 @@
OnOffAuto locking;
opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto fail;
}
@@ -999,8 +998,7 @@
/* Handle options changes */
opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, state->options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, state->options, errp)) {
ret = -EINVAL;
goto out;
}
diff --git a/block/file-win32.c b/block/file-win32.c
index 5f80153..ab69bd8 100644
--- a/block/file-win32.c
+++ b/block/file-win32.c
@@ -338,8 +338,7 @@
s->type = FTYPE_FILE;
opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto fail;
}
@@ -738,8 +737,7 @@
QemuOpts *opts = qemu_opts_create(&raw_runtime_opts, NULL, 0,
&error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto done;
}
diff --git a/block/gluster.c b/block/gluster.c
index b68bd32..c620880 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -811,12 +811,10 @@
int ret = 0;
BlockdevOptionsGluster *gconf = NULL;
QemuOpts *opts;
- Error *local_err = NULL;
const char *filename, *logfile;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto out;
}
diff --git a/block/iscsi.c b/block/iscsi.c
index d4dfa99..6c2e353 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1792,8 +1792,7 @@
int i, ret = 0, timeout = 0, lun;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto out;
}
diff --git a/block/nbd.c b/block/nbd.c
index 1331307..6876da0 100644
--- a/block/nbd.c
+++ b/block/nbd.c
@@ -1726,7 +1726,6 @@
SocketAddress *saddr = NULL;
QDict *addr = NULL;
Visitor *iv = NULL;
- Error *local_err = NULL;
qdict_extract_subqdict(options, &addr, "server.");
if (!qdict_size(addr)) {
@@ -1739,8 +1738,7 @@
goto done;
}
- if (!visit_type_SocketAddress(iv, NULL, &saddr, &local_err)) {
- error_propagate(errp, local_err);
+ if (!visit_type_SocketAddress(iv, NULL, &saddr, errp)) {
goto done;
}
@@ -1835,12 +1833,10 @@
{
BDRVNBDState *s = bs->opaque;
QemuOpts *opts;
- Error *local_err = NULL;
int ret = -EINVAL;
opts = qemu_opts_create(&nbd_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
goto error;
}
diff --git a/block/qcow2.c b/block/qcow2.c
index ce6333f..f419860 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -990,8 +990,7 @@
encryptfmt = qdict_get_try_str(encryptopts, "format");
opts = qemu_opts_create(&qcow2_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto fail;
}
@@ -1595,8 +1594,7 @@
/* read qcow2 extensions */
if (qcow2_read_extensions(bs, header.header_length, ext_end, NULL,
- flags, &update_header, &local_err)) {
- error_propagate(errp, local_err);
+ flags, &update_header, errp)) {
ret = -EINVAL;
goto fail;
}
@@ -3357,7 +3355,6 @@
int version;
int refcount_order;
uint64_t* refcount_table;
- Error *local_err = NULL;
int ret;
uint8_t compression_type = QCOW2_COMPRESSION_TYPE_ZLIB;
@@ -3583,9 +3580,8 @@
}
blk = blk_new_open(NULL, NULL, options,
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_NO_FLUSH,
- &local_err);
+ errp);
if (blk == NULL) {
- error_propagate(errp, local_err);
ret = -EIO;
goto out;
}
@@ -3665,9 +3661,8 @@
}
blk = blk_new_open(NULL, NULL, options,
BDRV_O_RDWR | BDRV_O_NO_BACKING | BDRV_O_NO_IO,
- &local_err);
+ errp);
if (blk == NULL) {
- error_propagate(errp, local_err);
ret = -EIO;
goto out;
}
diff --git a/block/raw-format.c b/block/raw-format.c
index a66fbe7..42ec508 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -74,13 +74,11 @@
static int raw_read_options(QDict *options, uint64_t *offset, bool *has_size,
uint64_t *size, Error **errp)
{
- Error *local_err = NULL;
QemuOpts *opts = NULL;
int ret;
opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto end;
}
diff --git a/block/sheepdog.c b/block/sheepdog.c
index e3bcb05..a6a9144 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -532,7 +532,6 @@
QDict *server = NULL;
Visitor *iv = NULL;
SocketAddress *saddr = NULL;
- Error *local_err = NULL;
qdict_extract_subqdict(options, &server, "server.");
@@ -541,8 +540,7 @@
goto done;
}
- if (!visit_type_SocketAddress(iv, NULL, &saddr, &local_err)) {
- error_propagate(errp, local_err);
+ if (!visit_type_SocketAddress(iv, NULL, &saddr, errp)) {
goto done;
}
@@ -1549,14 +1547,12 @@
uint64_t snap_id;
char *buf = NULL;
QemuOpts *opts;
- Error *local_err = NULL;
s->bs = bs;
s->aio_context = bdrv_get_aio_context(bs);
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto err_no_fd;
}
diff --git a/block/ssh.c b/block/ssh.c
index 13a2964..f00b896 100644
--- a/block/ssh.c
+++ b/block/ssh.c
@@ -622,8 +622,7 @@
/* Translate legacy options */
opts = qemu_opts_create(&ssh_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
goto fail;
}
diff --git a/block/throttle.c b/block/throttle.c
index c0802ad..1c1ac57 100644
--- a/block/throttle.c
+++ b/block/throttle.c
@@ -46,11 +46,9 @@
{
int ret;
const char *group_name;
- Error *local_err = NULL;
QemuOpts *opts = qemu_opts_create(&throttle_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto fin;
}
diff --git a/block/vmdk.c b/block/vmdk.c
index 4d42d2f..9a09193 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -2250,7 +2250,6 @@
{
int ret;
BlockBackend *blk = NULL;
- Error *local_err = NULL;
ret = bdrv_create_file(filename, opts, errp);
if (ret < 0) {
@@ -2259,9 +2258,8 @@
blk = blk_new_open(filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
- &local_err);
+ errp);
if (blk == NULL) {
- error_propagate(errp, local_err);
ret = -EIO;
goto exit;
}
diff --git a/block/vpc.c b/block/vpc.c
index 04da71e..cfec15f 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -235,8 +235,7 @@
}
opts = qemu_opts_create(&vpc_runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto fail;
}
diff --git a/block/vvfat.c b/block/vvfat.c
index e3e27e0..24d3622 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -1149,8 +1149,7 @@
#endif
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
- if (!qemu_opts_absorb_qdict(opts, options, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(opts, options, errp)) {
ret = -EINVAL;
goto fail;
}
diff --git a/blockdev.c b/blockdev.c
index 705869d..1f254e7 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -863,8 +863,7 @@
legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
&error_abort);
- if (!qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err)) {
- error_propagate(errp, local_err);
+ if (!qemu_opts_absorb_qdict(legacy_opts, bs_opts, errp)) {
goto fail;
}
diff --git a/hw/intc/xics.c b/hw/intc/xics.c
index c1feb64..68f9d44 100644
--- a/hw/intc/xics.c
+++ b/hw/intc/xics.c
@@ -376,7 +376,6 @@
Object *icp_create(Object *cpu, const char *type, XICSFabric *xi, Error **errp)
{
- Error *local_err = NULL;
Object *obj;
obj = object_new(type);
@@ -384,9 +383,8 @@
object_unref(obj);
object_property_set_link(obj, ICP_PROP_XICS, OBJECT(xi), &error_abort);
object_property_set_link(obj, ICP_PROP_CPU, cpu, &error_abort);
- if (!qdev_realize(DEVICE(obj), NULL, &local_err)) {
+ if (!qdev_realize(DEVICE(obj), NULL, errp)) {
object_unparent(obj);
- error_propagate(errp, local_err);
obj = NULL;
}
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 6fde80c..2e561c0 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -292,8 +292,7 @@
qemu_set_fd_handler(fd, vfio_intx_interrupt, NULL, vdev);
if (vfio_set_irq_signaling(&vdev->vbasedev, VFIO_PCI_INTX_IRQ_INDEX, 0,
- VFIO_IRQ_SET_ACTION_TRIGGER, fd, &err)) {
- error_propagate(errp, err);
+ VFIO_IRQ_SET_ACTION_TRIGGER, fd, errp)) {
qemu_set_fd_handler(fd, NULL, NULL, vdev);
event_notifier_cleanup(&vdev->intx.interrupt);
return -errno;
diff --git a/net/tap.c b/net/tap.c
index 2d8d83a..f9dcc2e 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -836,9 +836,8 @@
}
for (i = 0; i < nfds; i++) {
- fd = monitor_fd_param(cur_mon, fds[i], &err);
+ fd = monitor_fd_param(cur_mon, fds[i], errp);
if (fd == -1) {
- error_propagate(errp, err);
ret = -1;
goto free_fail;
}
diff --git a/qom/object.c b/qom/object.c
index 08b2cad..37e4bc4 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1599,11 +1599,9 @@
{
Visitor *v;
char *string = NULL;
- Error *local_err = NULL;
v = string_output_visitor_new(human, &string);
- if (!object_property_get(obj, name, v, &local_err)) {
- error_propagate(errp, local_err);
+ if (!object_property_get(obj, name, v, errp)) {
goto out;
}
