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Use error_is_set() only when necessary

Browse Source 
error_is_set(&var) is the same as var != NULL, but it takes
whole-program analysis to figure that out.  Unnecessarily hard for
optimizers, static checkers, and human readers.  Dumb it down to
obvious.

Gets rid of several dozen Coverity false positives.

Note that the obvious form is already used in many places.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Markus Armbruster
2014-02-17 11:57:23 -05:00
committed by Luiz Capitulino
parent ff9ec34de8
commit 84d18f065f
37 changed files with 156 additions and 156 deletions
Download Patch File Download Diff File Expand all files Collapse all files
block.c
+8 -8
View File
@@ -421,7 +421,7 @@ static void coroutine_fn bdrv_create_co_entry(void *opaque)
assert(cco->drv);
ret = cco->drv->bdrv_create(cco->filename, cco->options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(&cco->err, local_err);
}
cco->ret = ret;
@@ -460,7 +460,7 @@ int bdrv_create(BlockDriver *drv, const char* filename,
ret = cco.ret;
if (ret < 0) {
if (error_is_set(&cco.err)) {
if (cco.err) {
error_propagate(errp, cco.err);
} else {
error_setg_errno(errp, -ret, "Could not create image");
@@ -486,7 +486,7 @@ int bdrv_create_file(const char* filename, QEMUOptionParameter *options,
}
ret = bdrv_create(drv, filename, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
@@ -909,7 +909,7 @@ static int bdrv_open_common(BlockDriverState *bs, BlockDriverState *file,
}
if (ret < 0) {
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
} else if (bs->filename[0]) {
error_setg_errno(errp, -ret, "Could not open '%s'", bs->filename);
@@ -1031,7 +1031,7 @@ int bdrv_file_open(BlockDriverState **pbs, const char *filename,
/* Parse the filename and open it */
if (drv->bdrv_parse_filename && filename) {
drv->bdrv_parse_filename(filename, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto fail;
@@ -1400,7 +1400,7 @@ fail:
QDECREF(bs->options);
QDECREF(options);
bs->options = NULL;
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
@@ -1408,7 +1408,7 @@ fail:
close_and_fail:
bdrv_close(bs);
QDECREF(options);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
@@ -5338,7 +5338,7 @@ out:
free_option_parameters(create_options);
free_option_parameters(param);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
}
block/blkdebug.c
+2 -2
View File
@@ -303,7 +303,7 @@ static int read_config(BDRVBlkdebugState *s, const char *filename,
}
qemu_config_parse_qdict(options, config_groups, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto fail;
@@ -393,7 +393,7 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto out;
block/blkverify.c
+1 -1
View File
@@ -128,7 +128,7 @@ static int blkverify_open(BlockDriverState *bs, QDict *options, int flags,
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto fail;
block/curl.c
+1 -1
View File
@@ -463,7 +463,7 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
goto out_noclean;
block/gluster.c
+1 -1
View File
@@ -282,7 +282,7 @@ static int qemu_gluster_open(BlockDriverState *bs, QDict *options,
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
ret = -EINVAL;
block/iscsi.c
+1 -1
View File
@@ -1123,7 +1123,7 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
ret = -EINVAL;
block/nbd.c
+1 -1
View File
@@ -209,7 +209,7 @@ static int nbd_config(BDRVNBDState *s, QDict *options, char **export)
&error_abort);
qemu_opts_absorb_qdict(s->socket_opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
return -EINVAL;
block/qapi.c
+2 -2
View File
@@ -271,7 +271,7 @@ void bdrv_query_info(BlockDriverState *bs,
p_image_info = &info->inserted->image;
while (1) {
bdrv_query_image_info(bs0, p_image_info, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
goto err;
}
@@ -336,7 +336,7 @@ BlockInfoList *qmp_query_block(Error **errp)
while ((bs = bdrv_next(bs))) {
BlockInfoList *info = g_malloc0(sizeof(*info));
bdrv_query_info(bs, &info->value, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
goto err;
}
block/qcow2.c
+3 -3
View File
@@ -671,7 +671,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
/* Enable lazy_refcounts according to image and command line options */
opts = qemu_opts_create(&qcow2_runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto fail;
@@ -1605,7 +1605,7 @@ static int qcow2_create2(const char *filename, int64_t total_size,
ret = bdrv_open(bs, filename, NULL,
BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_NO_BACKING,
drv, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
goto out;
}
@@ -1685,7 +1685,7 @@ static int qcow2_create(const char *filename, QEMUOptionParameter *options,
ret = qcow2_create2(filename, sectors, backing_file, backing_fmt, flags,
cluster_size, prealloc, options, version, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
block/raw-posix.c
+6 -6
View File
@@ -361,7 +361,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto fail;
@@ -448,7 +448,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
s->type = FTYPE_FILE;
ret = raw_open_common(bs, options, flags, 0, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
@@ -1597,7 +1597,7 @@ static int hdev_open(BlockDriverState *bs, QDict *options, int flags,
ret = raw_open_common(bs, options, flags, 0, &local_err);
if (ret < 0) {
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
@@ -1832,7 +1832,7 @@ static int floppy_open(BlockDriverState *bs, QDict *options, int flags,
/* open will not fail even if no floppy is inserted, so add O_NONBLOCK */
ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err);
if (ret) {
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
@@ -1961,7 +1961,7 @@ static int cdrom_open(BlockDriverState *bs, QDict *options, int flags,
/* open will not fail even if no CD is inserted, so add O_NONBLOCK */
ret = raw_open_common(bs, options, flags, O_NONBLOCK, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
@@ -2078,7 +2078,7 @@ static int cdrom_open(BlockDriverState *bs, QDict *options, int flags,
ret = raw_open_common(bs, options, flags, 0, &local_err);
if (ret) {
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
block/raw-win32.c
+2 -2
View File
@@ -279,7 +279,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
opts = qemu_opts_create(&raw_runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto fail;
@@ -594,7 +594,7 @@ static int hdev_open(BlockDriverState *bs, QDict *options, int flags,
QemuOpts *opts = qemu_opts_create(&raw_runtime_opts, NULL, 0,
&error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto done;
block/raw_bsd.c
+1 -1
View File
@@ -146,7 +146,7 @@ static int raw_create(const char *filename, QEMUOptionParameter *options,
int ret;
ret = bdrv_create_file(filename, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
return ret;
block/rbd.c
+1 -1
View File
@@ -440,7 +440,7 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
qemu_opts_del(opts);
block/sheepdog.c
+1 -1
View File
@@ -1385,7 +1385,7 @@ static int sd_open(BlockDriverState *bs, QDict *options, int flags,
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
ret = -EINVAL;
block/snapshot.c
+1 -1
View File
@@ -345,7 +345,7 @@ int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
ret = bdrv_snapshot_load_tmp(bs, NULL, id_or_name, &local_err);
}
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
}
block/vvfat.c
+1 -1
View File
@@ -1085,7 +1085,7 @@ DLOG(if (stderr == NULL) {
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
ret = -EINVAL;
blockdev.c
+21 -21
View File
@@ -331,13 +331,13 @@ static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
* stay in bs_opts for processing by bdrv_open(). */
id = qdict_get_try_str(bs_opts, "id");
opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
if (error_is_set(&error)) {
if (error) {
error_propagate(errp, error);
return NULL;
}
qemu_opts_absorb_qdict(opts, bs_opts, &error);
if (error_is_set(&error)) {
if (error) {
error_propagate(errp, error);
goto early_err;
}
@@ -443,7 +443,7 @@ static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
}
on_write_error = parse_block_error_action(buf, 0, &error);
if (error_is_set(&error)) {
if (error) {
error_propagate(errp, error);
goto early_err;
}
@@ -457,7 +457,7 @@ static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
}
on_read_error = parse_block_error_action(buf, 1, &error);
if (error_is_set(&error)) {
if (error) {
error_propagate(errp, error);
goto early_err;
}
@@ -688,7 +688,7 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
&error_abort);
qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
goto fail;
@@ -875,13 +875,13 @@ DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
/* Actual block device init: Functionality shared with blockdev-add */
dinfo = blockdev_init(filename, bs_opts, type, &local_err);
if (dinfo == NULL) {
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
}
goto fail;
} else {
assert(!error_is_set(&local_err));
assert(!local_err);
}
/* Set legacy DriveInfo fields */
@@ -1017,7 +1017,7 @@ SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
}
ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return NULL;
}
@@ -1030,7 +1030,7 @@ SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
}
bdrv_snapshot_delete(bs, id, name, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return NULL;
}
@@ -1244,7 +1244,7 @@ static void external_snapshot_prepare(BlkTransactionState *common,
state->old_bs = bdrv_lookup_bs(has_device ? device : NULL,
has_node_name ? node_name : NULL,
&local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@@ -1289,7 +1289,7 @@ static void external_snapshot_prepare(BlkTransactionState *common,
state->old_bs->filename,
state->old_bs->drv->format_name,
NULL, -1, flags, &local_err, false);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@@ -1360,7 +1360,7 @@ static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
backup->has_on_source_error, backup->on_source_error,
backup->has_on_target_error, backup->on_target_error,
&local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
state->bs = NULL;
state->job = NULL;
@@ -1452,7 +1452,7 @@ void qmp_transaction(TransactionActionList *dev_list, Error **errp)
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
state->ops->prepare(state, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
goto delete_and_fail;
}
@@ -1533,7 +1533,7 @@ void qmp_block_passwd(bool has_device, const char *device,
bs = bdrv_lookup_bs(has_device ? device : NULL,
has_node_name ? node_name : NULL,
&local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@@ -1598,7 +1598,7 @@ void qmp_change_blockdev(const char *device, const char *filename,
}
eject_device(bs, 0, &err);
if (error_is_set(&err)) {
if (err) {
error_propagate(errp, err);
return;
}
@@ -1735,7 +1735,7 @@ void qmp_block_resize(bool has_device, const char *device,
bs = bdrv_lookup_bs(has_device ? device : NULL,
has_node_name ? node_name : NULL,
&local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@@ -1828,7 +1828,7 @@ void qmp_block_stream(const char *device, bool has_base,
stream_start(bs, base_bs, base, has_speed ? speed : 0,
on_error, block_job_cb, bs, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@@ -1986,7 +1986,7 @@ void qmp_drive_backup(const char *device, const char *target,
}
}
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@@ -2127,7 +2127,7 @@ void qmp_drive_mirror(const char *device, const char *target,
}
}
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
@@ -2266,7 +2266,7 @@ void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
visit_type_BlockdevOptions(qmp_output_get_visitor(ov),
&options, NULL, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
goto fail;
}
@@ -2277,7 +2277,7 @@ void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
qdict_flatten(qdict);
blockdev_init(NULL, qdict, IF_NONE, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
goto fail;
}
blockjob.c
+2 -2
View File
@@ -61,7 +61,7 @@ void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
Error *local_err = NULL;
block_job_set_speed(job, speed, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
bs->job = NULL;
g_free(job);
bdrv_set_in_use(bs, 0);
@@ -92,7 +92,7 @@ void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp)
return;
}
job->driver->set_speed(job, speed, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
error_propagate(errp, local_err);
return;
}
hmp.c
+4 -4
View File
@@ -881,7 +881,7 @@ void hmp_balloon(Monitor *mon, const QDict *qdict)
Error *errp = NULL;
qmp_balloon(value, &errp);
if (error_is_set(&errp)) {
if (errp) {
monitor_printf(mon, "balloon: %s\n", error_get_pretty(errp));
error_free(errp);
}
@@ -1118,7 +1118,7 @@ void hmp_change(Monitor *mon, const QDict *qdict)
}
qmp_change(device, target, !!arg, arg, &err);
if (error_is_set(&err) &&
if (err &&
error_get_class(err) == ERROR_CLASS_DEVICE_ENCRYPTED) {
error_free(err);
monitor_read_block_device_key(mon, device, NULL, NULL);
@@ -1336,12 +1336,12 @@ void hmp_netdev_add(Monitor *mon, const QDict *qdict)
QemuOpts *opts;
opts = qemu_opts_from_qdict(qemu_find_opts("netdev"), qdict, &err);
if (error_is_set(&err)) {
if (err) {
goto out;
}
netdev_add(opts, &err);
if (error_is_set(&err)) {
if (err) {
qemu_opts_del(opts);
}
hw/pci/pci-hotplug-old.c
+2 -2
View File
@@ -90,7 +90,7 @@ static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
qemu_opt_set(opts, "type", "nic");
ret = net_client_init(opts, 0, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
qerror_report_err(local_err);
error_free(local_err);
return NULL;
@@ -322,7 +322,7 @@ static int pci_device_hot_remove(Monitor *mon, const char *pci_addr)
}
qdev_unplug(&d->qdev, &local_err);
if (error_is_set(&local_err)) {
if (local_err) {
monitor_printf(mon, "%s\n", error_get_pretty(local_err));
error_free(local_err);
return -1;

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