Re: [PATCH 09/14] vfio: Add Error** argument to .vfio_save_config() handler
On 07/02/2024 15:33, Cédric Le Goater wrote: External email: Use caution opening links or attachments Use vmstate_save_state_with_err() to improve error reporting in the callers. Signed-off-by: Cédric Le Goater --- include/hw/vfio/vfio-common.h | 2 +- hw/vfio/migration.c | 18 -- hw/vfio/pci.c | 5 +++-- 3 files changed, 16 insertions(+), 9 deletions(-) diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 9b7ef7d02b5a0ad5266bcc4d06cd6874178978e4..710e0d6a880b97848af6ddc2e7968a01054fa122 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -133,7 +133,7 @@ struct VFIODeviceOps { int (*vfio_hot_reset_multi)(VFIODevice *vdev); void (*vfio_eoi)(VFIODevice *vdev); Object *(*vfio_get_object)(VFIODevice *vdev); -void (*vfio_save_config)(VFIODevice *vdev, QEMUFile *f); +int (*vfio_save_config)(VFIODevice *vdev, QEMUFile *f, Error **errp); int (*vfio_load_config)(VFIODevice *vdev, QEMUFile *f); }; diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 2e0a79967cc97f44d9be5575c3cfe18c9f349dab..fb264c1ef57bbbde4306901e5449e0dfbd0ce3b7 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -190,14 +190,19 @@ static int vfio_load_buffer(QEMUFile *f, VFIODevice *vbasedev, return ret; } -static int vfio_save_device_config_state(QEMUFile *f, void *opaque) +static int vfio_save_device_config_state(QEMUFile *f, void *opaque, + Error **errp) { VFIODevice *vbasedev = opaque; +int ret = 0; Nit: 0 assignment is redundant. Thanks. qemu_put_be64(f, VFIO_MIG_FLAG_DEV_CONFIG_STATE); if (vbasedev->ops && vbasedev->ops->vfio_save_config) { -vbasedev->ops->vfio_save_config(vbasedev, f); +ret = vbasedev->ops->vfio_save_config(vbasedev, f, errp); +if (ret) { +return ret; +} } qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE); @@ -579,13 +584,14 @@ static int vfio_save_complete_precopy(QEMUFile *f, void *opaque) static void vfio_save_state(QEMUFile *f, void *opaque) { VFIODevice *vbasedev = opaque; +Error *local_err = NULL; int ret; -ret = vfio_save_device_config_state(f, opaque); +ret = vfio_save_device_config_state(f, opaque, _err); if (ret) { -error_report("%s: Failed to save device config space", - vbasedev->name); -qemu_file_set_error(f, ret); +error_prepend(_err, "%s: Failed to save device config space", + vbasedev->name); +qemu_file_set_error_obj(f, ret, local_err); } } diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 4fa387f0430d62ca2ba1b5ae5b7037f8f06b33f9..99d86e1d40ef25133fc76ad6e58294b07bd20843 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2585,11 +2585,12 @@ const VMStateDescription vmstate_vfio_pci_config = { } }; -static void vfio_pci_save_config(VFIODevice *vbasedev, QEMUFile *f) +static int vfio_pci_save_config(VFIODevice *vbasedev, QEMUFile *f, Error **errp) { VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev); -vmstate_save_state(f, _vfio_pci_config, vdev, NULL); +return vmstate_save_state_with_err(f, _vfio_pci_config, vdev, NULL, + errp); } static int vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f) -- 2.43.0
Re: [PATCH 09/14] vfio: Add Error** argument to .vfio_save_config() handler
On 7/2/24 14:33, Cédric Le Goater wrote: Use vmstate_save_state_with_err() to improve error reporting in the callers. Signed-off-by: Cédric Le Goater --- include/hw/vfio/vfio-common.h | 2 +- hw/vfio/migration.c | 18 -- hw/vfio/pci.c | 5 +++-- 3 files changed, 16 insertions(+), 9 deletions(-) diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 9b7ef7d02b5a0ad5266bcc4d06cd6874178978e4..710e0d6a880b97848af6ddc2e7968a01054fa122 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -133,7 +133,7 @@ struct VFIODeviceOps { int (*vfio_hot_reset_multi)(VFIODevice *vdev); void (*vfio_eoi)(VFIODevice *vdev); Object *(*vfio_get_object)(VFIODevice *vdev); -void (*vfio_save_config)(VFIODevice *vdev, QEMUFile *f); +int (*vfio_save_config)(VFIODevice *vdev, QEMUFile *f, Error **errp); Worth a one-line docstring? Otherwise, Reviewed-by: Philippe Mathieu-Daudé int (*vfio_load_config)(VFIODevice *vdev, QEMUFile *f); };
[PATCH 09/14] vfio: Add Error** argument to .vfio_save_config() handler
Use vmstate_save_state_with_err() to improve error reporting in the callers. Signed-off-by: Cédric Le Goater --- include/hw/vfio/vfio-common.h | 2 +- hw/vfio/migration.c | 18 -- hw/vfio/pci.c | 5 +++-- 3 files changed, 16 insertions(+), 9 deletions(-) diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 9b7ef7d02b5a0ad5266bcc4d06cd6874178978e4..710e0d6a880b97848af6ddc2e7968a01054fa122 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -133,7 +133,7 @@ struct VFIODeviceOps { int (*vfio_hot_reset_multi)(VFIODevice *vdev); void (*vfio_eoi)(VFIODevice *vdev); Object *(*vfio_get_object)(VFIODevice *vdev); -void (*vfio_save_config)(VFIODevice *vdev, QEMUFile *f); +int (*vfio_save_config)(VFIODevice *vdev, QEMUFile *f, Error **errp); int (*vfio_load_config)(VFIODevice *vdev, QEMUFile *f); }; diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 2e0a79967cc97f44d9be5575c3cfe18c9f349dab..fb264c1ef57bbbde4306901e5449e0dfbd0ce3b7 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -190,14 +190,19 @@ static int vfio_load_buffer(QEMUFile *f, VFIODevice *vbasedev, return ret; } -static int vfio_save_device_config_state(QEMUFile *f, void *opaque) +static int vfio_save_device_config_state(QEMUFile *f, void *opaque, + Error **errp) { VFIODevice *vbasedev = opaque; +int ret = 0; qemu_put_be64(f, VFIO_MIG_FLAG_DEV_CONFIG_STATE); if (vbasedev->ops && vbasedev->ops->vfio_save_config) { -vbasedev->ops->vfio_save_config(vbasedev, f); +ret = vbasedev->ops->vfio_save_config(vbasedev, f, errp); +if (ret) { +return ret; +} } qemu_put_be64(f, VFIO_MIG_FLAG_END_OF_STATE); @@ -579,13 +584,14 @@ static int vfio_save_complete_precopy(QEMUFile *f, void *opaque) static void vfio_save_state(QEMUFile *f, void *opaque) { VFIODevice *vbasedev = opaque; +Error *local_err = NULL; int ret; -ret = vfio_save_device_config_state(f, opaque); +ret = vfio_save_device_config_state(f, opaque, _err); if (ret) { -error_report("%s: Failed to save device config space", - vbasedev->name); -qemu_file_set_error(f, ret); +error_prepend(_err, "%s: Failed to save device config space", + vbasedev->name); +qemu_file_set_error_obj(f, ret, local_err); } } diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 4fa387f0430d62ca2ba1b5ae5b7037f8f06b33f9..99d86e1d40ef25133fc76ad6e58294b07bd20843 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2585,11 +2585,12 @@ const VMStateDescription vmstate_vfio_pci_config = { } }; -static void vfio_pci_save_config(VFIODevice *vbasedev, QEMUFile *f) +static int vfio_pci_save_config(VFIODevice *vbasedev, QEMUFile *f, Error **errp) { VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev); -vmstate_save_state(f, _vfio_pci_config, vdev, NULL); +return vmstate_save_state_with_err(f, _vfio_pci_config, vdev, NULL, + errp); } static int vfio_pci_load_config(VFIODevice *vbasedev, QEMUFile *f) -- 2.43.0