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error: Eliminate error_propagate() with Coccinelle, part 2

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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>
This commit is contained in:
Markus Armbruster 2020-07-07 18:06:03 +02:00
parent 668f62ec62
commit af175e85f9
23 changed files with 32 additions and 77 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
block.c
View File

@ -1629,8 +1629,7 @@ static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file,
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 @@ int bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue,
/* 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;
}

7
block/blkdebug.c
View File

@ -359,7 +359,6 @@ static int blkdebug_parse_perm_list(uint64_t *dest, QDict *options,
QObject *crumpled_subqdict = NULL;
Visitor *v = NULL;
BlockPermissionList *perm_list = NULL, *element;
Error *local_err = NULL;
*dest = 0;
@ -375,8 +374,7 @@ static int blkdebug_parse_perm_list(uint64_t *dest, QDict *options,
}
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 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
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;
}

3
block/blklogwrites.c
View File

@ -149,9 +149,8 @@ static int blk_log_writes_open(BlockDriverState *bs, QDict *options, int flags,
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;
}

3
block/blkverify.c
View File

@ -116,8 +116,7 @@ static int blkverify_open(BlockDriverState *bs, QDict *options, int flags,
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;
}

4
block/crypto.c
View File

@ -260,7 +260,6 @@ static int block_crypto_open_generic(QCryptoBlockFormat format,
{
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 @@ static int block_crypto_open_generic(QCryptoBlockFormat format,
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;
}

6
block/file-posix.c
View File

@ -490,8 +490,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
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 @@ static int raw_reopen_prepare(BDRVReopenState *state,
/* 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;
}

6
block/file-win32.c
View File

@ -338,8 +338,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
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 @@ static int hdev_open(BlockDriverState *bs, QDict *options, int flags,
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;
}

4
block/gluster.c
View File

@ -811,12 +811,10 @@ static int qemu_gluster_open(BlockDriverState *bs, QDict *options,
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;
}

3
block/iscsi.c
View File

@ -1792,8 +1792,7 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags,
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;
}

8
block/nbd.c
View File

@ -1726,7 +1726,6 @@ static SocketAddress *nbd_config(BDRVNBDState *s, QDict *options,
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 @@ static SocketAddress *nbd_config(BDRVNBDState *s, QDict *options,
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 @@ static int nbd_process_options(BlockDriverState *bs, QDict *options,
{
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;
}

13
block/qcow2.c
View File

@ -990,8 +990,7 @@ static int qcow2_update_options_prepare(BlockDriverState *bs,
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 @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options,
/* 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 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
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 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
}
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 @@ qcow2_co_create(BlockdevCreateOptions *create_options, Error **errp)
}
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;
}

4
block/raw-format.c
View File

@ -74,13 +74,11 @@ static QemuOptsList raw_create_opts = {
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;
}

8
block/sheepdog.c
View File

@ -532,7 +532,6 @@ static SocketAddress *sd_server_config(QDict *options, Error **errp)
QDict *server = NULL;
Visitor *iv = NULL;
SocketAddress *saddr = NULL;
Error *local_err = NULL;
qdict_extract_subqdict(options, &server, "server.");
@ -541,8 +540,7 @@ static SocketAddress *sd_server_config(QDict *options, Error **errp)
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 @@ static int sd_open(BlockDriverState *bs, QDict *options, int flags,
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;
}

3
block/ssh.c
View File

@ -622,8 +622,7 @@ static BlockdevOptionsSsh *ssh_parse_options(QDict *options, Error **errp)
/* 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;
}

4
block/throttle.c
View File

@ -46,11 +46,9 @@ static int throttle_parse_options(QDict *options, char **group, Error **errp)
{
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;
}

4
block/vmdk.c
View File

@ -2250,7 +2250,6 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
{
int ret;
BlockBackend *blk = NULL;
Error *local_err = NULL;
ret = bdrv_create_file(filename, opts, errp);
if (ret < 0) {
@ -2259,9 +2258,8 @@ static int vmdk_create_extent(const char *filename, int64_t filesize,
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;
}

3
block/vpc.c
View File

@ -235,8 +235,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags,
}
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;
}

3
block/vvfat.c
View File

@ -1149,8 +1149,7 @@ static int vvfat_open(BlockDriverState *bs, QDict *options, int flags,
#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;
}

3
blockdev.c
View File

@ -863,8 +863,7 @@ DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type,
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;
}

4
hw/intc/xics.c
View File

@ -376,7 +376,6 @@ static const TypeInfo icp_info = {
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 *icp_create(Object *cpu, const char *type, XICSFabric *xi, Error **errp)
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;
}

3
hw/vfio/pci.c
View File

@ -292,8 +292,7 @@ static int vfio_intx_enable(VFIOPCIDevice *vdev, Error **errp)
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;

3
net/tap.c
View File

@ -836,9 +836,8 @@ int net_init_tap(const Netdev *netdev, const char *name,
}
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;
}

4
qom/object.c
View File

@ -1599,11 +1599,9 @@ char *object_property_print(Object *obj, const char *name, bool human,
{
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;
}