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vfio: Rework to have error paths 

This reworks vfio_connect_container() and vfio_get_group() to have
common exit path at the end of the function bodies.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alexey Kardashevskiy 2014-05-30 13:03:21 -06:00 committed by Alex Williamson
parent 7532d3cbf1
commit 279a35ab4a
1 changed files with 32 additions and 26 deletions
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58
hw/misc/vfio.c
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@ -3448,8 +3448,8 @@ static int vfio_connect_container(VFIOGroup *group)
if (ret != VFIO_API_VERSION) {
error_report("vfio: supported vfio version: %d, "
"reported version: %d", VFIO_API_VERSION, ret);
close(fd);
return -EINVAL;
ret = -EINVAL;
goto close_fd_exit;
}
container = g_malloc0(sizeof(*container));
@ -3459,17 +3459,15 @@ static int vfio_connect_container(VFIOGroup *group)
ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
if (ret) {
error_report("vfio: failed to set group container: %m");
g_free(container);
close(fd);
return -errno;
ret = -errno;
goto free_container_exit;
}
ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU);
if (ret) {
error_report("vfio: failed to set iommu for container: %m");
g_free(container);
close(fd);
return -errno;
ret = -errno;
goto free_container_exit;
}
container->iommu_data.type1.listener = vfio_memory_listener;
@ -3480,20 +3478,16 @@ static int vfio_connect_container(VFIOGroup *group)
if (container->iommu_data.type1.error) {
ret = container->iommu_data.type1.error;
vfio_listener_release(container);
g_free(container);
close(fd);
error_report("vfio: memory listener initialization failed for container");
return ret;
goto listener_release_exit;
}
container->iommu_data.type1.initialized = true;
} else {
error_report("vfio: No available IOMMU models");
g_free(container);
close(fd);
return -EINVAL;
ret = -EINVAL;
goto free_container_exit;
}
QLIST_INIT(&container->group_list);
@ -3503,6 +3497,17 @@ static int vfio_connect_container(VFIOGroup *group)
QLIST_INSERT_HEAD(&container->group_list, group, container_next);
return 0;
listener_release_exit:
vfio_listener_release(container);
free_container_exit:
g_free(container);
close_fd_exit:
close(fd);
return ret;
}
static void vfio_disconnect_container(VFIOGroup *group)
@ -3546,24 +3551,19 @@ static VFIOGroup *vfio_get_group(int groupid)
group->fd = qemu_open(path, O_RDWR);
if (group->fd < 0) {
error_report("vfio: error opening %s: %m", path);
g_free(group);
return NULL;
goto free_group_exit;
}
if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) {
error_report("vfio: error getting group status: %m");
close(group->fd);
g_free(group);
return NULL;
goto close_fd_exit;
}
if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
error_report("vfio: error, group %d is not viable, please ensure "
"all devices within the iommu_group are bound to their "
"vfio bus driver.", groupid);
close(group->fd);
g_free(group);
return NULL;
goto close_fd_exit;
}
group->groupid = groupid;
@ -3571,9 +3571,7 @@ static VFIOGroup *vfio_get_group(int groupid)
if (vfio_connect_container(group)) {
error_report("vfio: failed to setup container for group %d", groupid);
close(group->fd);
g_free(group);
return NULL;
goto close_fd_exit;
}
if (QLIST_EMPTY(&group_list)) {
@ -3585,6 +3583,14 @@ static VFIOGroup *vfio_get_group(int groupid)
vfio_kvm_device_add_group(group);
return group;
close_fd_exit:
close(group->fd);
free_group_exit:
g_free(group);
return NULL;
}
static void vfio_put_group(VFIOGroup *group)