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[RFC v5 053/126] virtio: introduce ERRP_AUTO_PROPAGATE
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[RFC v5 053/126] virtio: introduce ERRP_AUTO_PROPAGATE |
Date: |
Fri, 11 Oct 2019 19:04:39 +0300 |
If we want to add some info to errp (by error_prepend() or
error_append_hint()), we must use the ERRP_AUTO_PROPAGATE macro.
Otherwise, this info will not be added when errp == &fatal_err
(the program will exit prior to the error_append_hint() or
error_prepend() call). Fix such cases.
If we want to check error after errp-function call, we need to
introduce local_err and than propagate it to errp. Instead, use
ERRP_AUTO_PROPAGATE macro, benefits are:
1. No need of explicit error_propagate call
2. No need of explicit local_err variable: use errp directly
3. ERRP_AUTO_PROPAGATE leaves errp as is if it's not NULL or
&error_fatel, this means that we don't break error_abort
(we'll abort on error_set, not on error_propagate)
This commit (together with its neighbors) was generated by
for f in $(git grep -l errp \*.[ch]); do \
spatch --sp-file scripts/coccinelle/auto-propagated-errp.cocci \
--macro-file scripts/cocci-macro-file.h --in-place --no-show-diff $f; \
done;
then fix a bit of compilation problems: coccinelle for some reason
leaves several
f() {
...
goto out;
...
out:
}
patterns, with "out:" at function end.
then
./python/commit-per-subsystem.py MAINTAINERS "$(< auto-msg)"
(auto-msg was a file with this commit message)
Still, for backporting it may be more comfortable to use only the first
command and then do one huge commit.
Reported-by: Kevin Wolf <address@hidden>
Reported-by: Greg Kurz <address@hidden>
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
---
hw/virtio/virtio-balloon.c | 35 ++++++++++++++++-------------------
hw/virtio/virtio-bus.c | 17 +++++++----------
hw/virtio/virtio-pci.c | 2 ++
hw/virtio/virtio-rng-pci.c | 7 +++----
hw/virtio/virtio.c | 19 ++++++++-----------
5 files changed, 36 insertions(+), 44 deletions(-)
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 40b04f5180..eaee19df71 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -229,40 +229,38 @@ static void balloon_stats_poll_cb(void *opaque)
static void balloon_stats_get_all(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
- Error *err = NULL;
+ ERRP_AUTO_PROPAGATE();
VirtIOBalloon *s = opaque;
int i;
- visit_start_struct(v, name, NULL, 0, &err);
- if (err) {
- goto out;
+ visit_start_struct(v, name, NULL, 0, errp);
+ if (*errp) {
+ return;
}
- visit_type_int(v, "last-update", &s->stats_last_update, &err);
- if (err) {
+ visit_type_int(v, "last-update", &s->stats_last_update, errp);
+ if (*errp) {
goto out_end;
}
- visit_start_struct(v, "stats", NULL, 0, &err);
- if (err) {
+ visit_start_struct(v, "stats", NULL, 0, errp);
+ if (*errp) {
goto out_end;
}
for (i = 0; i < VIRTIO_BALLOON_S_NR; i++) {
- visit_type_uint64(v, balloon_stat_names[i], &s->stats[i], &err);
- if (err) {
+ visit_type_uint64(v, balloon_stat_names[i], &s->stats[i], errp);
+ if (*errp) {
goto out_nested;
}
}
- visit_check_struct(v, &err);
+ visit_check_struct(v, errp);
out_nested:
visit_end_struct(v, NULL);
- if (!err) {
- visit_check_struct(v, &err);
+ if (!*errp) {
+ visit_check_struct(v, errp);
}
out_end:
visit_end_struct(v, NULL);
-out:
- error_propagate(errp, err);
}
static void balloon_stats_get_poll_interval(Object *obj, Visitor *v,
@@ -277,13 +275,12 @@ static void balloon_stats_set_poll_interval(Object *obj,
Visitor *v,
const char *name, void *opaque,
Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
VirtIOBalloon *s = opaque;
- Error *local_err = NULL;
int64_t value;
- visit_type_int(v, name, &value, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ visit_type_int(v, name, &value, errp);
+ if (*errp) {
return;
}
diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c
index b2c804292e..d823fe682d 100644
--- a/hw/virtio/virtio-bus.c
+++ b/hw/virtio/virtio-bus.c
@@ -42,20 +42,19 @@ do { printf("virtio_bus: " fmt , ## __VA_ARGS__); } while
(0)
/* A VirtIODevice is being plugged */
void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
DeviceState *qdev = DEVICE(vdev);
BusState *qbus = BUS(qdev_get_parent_bus(qdev));
VirtioBusState *bus = VIRTIO_BUS(qbus);
VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
bool has_iommu = virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM);
- Error *local_err = NULL;
DPRINTF("%s: plug device.\n", qbus->name);
if (klass->pre_plugged != NULL) {
- klass->pre_plugged(qbus->parent, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ klass->pre_plugged(qbus->parent, errp);
+ if (*errp) {
return;
}
}
@@ -63,17 +62,15 @@ void virtio_bus_device_plugged(VirtIODevice *vdev, Error
**errp)
/* Get the features of the plugged device. */
assert(vdc->get_features != NULL);
vdev->host_features = vdc->get_features(vdev, vdev->host_features,
- &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ errp);
+ if (*errp) {
return;
}
if (klass->device_plugged != NULL) {
- klass->device_plugged(qbus->parent, &local_err);
+ klass->device_plugged(qbus->parent, errp);
}
- if (local_err) {
- error_propagate(errp, local_err);
+ if (*errp) {
return;
}
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index c6b47a9c73..a36e5f6990 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1525,6 +1525,7 @@ static void virtio_pci_pre_plugged(DeviceState *d, Error
**errp)
/* This is called by virtio-bus just after the device is plugged. */
static void virtio_pci_device_plugged(DeviceState *d, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
VirtioBusState *bus = &proxy->bus;
bool legacy = virtio_pci_legacy(proxy);
@@ -1684,6 +1685,7 @@ static void virtio_pci_device_unplugged(DeviceState *d)
static void virtio_pci_realize(PCIDevice *pci_dev, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
VirtIOPCIProxy *proxy = VIRTIO_PCI(pci_dev);
VirtioPCIClass *k = VIRTIO_PCI_GET_CLASS(pci_dev);
bool pcie_port = pci_bus_is_express(pci_get_bus(pci_dev)) &&
diff --git a/hw/virtio/virtio-rng-pci.c b/hw/virtio/virtio-rng-pci.c
index 8aaf54b781..993bb9aae4 100644
--- a/hw/virtio/virtio-rng-pci.c
+++ b/hw/virtio/virtio-rng-pci.c
@@ -32,14 +32,13 @@ struct VirtIORngPCI {
static void virtio_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
VirtIORngPCI *vrng = VIRTIO_RNG_PCI(vpci_dev);
DeviceState *vdev = DEVICE(&vrng->vdev);
- Error *err = NULL;
qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
- object_property_set_bool(OBJECT(vdev), true, "realized", &err);
- if (err) {
- error_propagate(errp, err);
+ object_property_set_bool(OBJECT(vdev), true, "realized", errp);
+ if (*errp) {
return;
}
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 527df03bfd..3a318232e6 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2606,24 +2606,22 @@ static void
virtio_memory_listener_commit(MemoryListener *listener)
static void virtio_device_realize(DeviceState *dev, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(dev);
- Error *err = NULL;
/* Devices should either use vmsd or the load/save methods */
assert(!vdc->vmsd || !vdc->load);
if (vdc->realize != NULL) {
- vdc->realize(dev, &err);
- if (err != NULL) {
- error_propagate(errp, err);
+ vdc->realize(dev, errp);
+ if (*errp) {
return;
}
}
- virtio_bus_device_plugged(vdev, &err);
- if (err != NULL) {
- error_propagate(errp, err);
+ virtio_bus_device_plugged(vdev, errp);
+ if (*errp) {
vdc->unrealize(dev, NULL);
return;
}
@@ -2634,16 +2632,15 @@ static void virtio_device_realize(DeviceState *dev,
Error **errp)
static void virtio_device_unrealize(DeviceState *dev, Error **errp)
{
+ ERRP_AUTO_PROPAGATE();
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(dev);
- Error *err = NULL;
virtio_bus_device_unplugged(vdev);
if (vdc->unrealize != NULL) {
- vdc->unrealize(dev, &err);
- if (err != NULL) {
- error_propagate(errp, err);
+ vdc->unrealize(dev, errp);
+ if (*errp) {
return;
}
}
--
2.21.0
- [RFC v5 043/126] ACPI/SMBIOS: introduce ERRP_AUTO_PROPAGATE, (continued)
- [RFC v5 043/126] ACPI/SMBIOS: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 015/126] hw/s390x: rename Error ** parameter to more common errp, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 050/126] VFIO: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 047/126] SD (Secure Card): introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 046/126] SCSI: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 057/126] virtio-input: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 058/126] virtio-serial: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 049/126] USB (serial adapter): introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 048/126] USB: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 053/126] virtio: introduce ERRP_AUTO_PROPAGATE,
Vladimir Sementsov-Ogievskiy <=
- [RFC v5 019/126] include/block/snapshot.h: rename Error ** parameter to more common errp, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 054/126] virtio-9p: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 023/126] hw/vfio/ap: drop local_err from vfio_ap_realize, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 028/126] s390x: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 064/126] fw_cfg: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 063/126] virtio-gpu: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 059/126] virtio-rng: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11
- [RFC v5 061/126] NVDIMM: introduce ERRP_AUTO_PROPAGATE, Vladimir Sementsov-Ogievskiy, 2019/10/11