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[PATCH v5 4/7] vfio/migration: Return bool type for some vfio migration
From: |
Zhenzhong Duan |
Subject: |
[PATCH v5 4/7] vfio/migration: Return bool type for some vfio migration related functions |
Date: |
Fri, 30 Jun 2023 15:36:34 +0800 |
Include:
vfio_block_multiple_devices_migration(),
vfio_block_giommu_migration(),
vfio_block_migration(),
vfio_migration_realize().
Suggested-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
---
hw/vfio/common.c | 16 ++++++++--------
hw/vfio/migration.c | 19 ++++++++++++-------
include/hw/vfio/vfio-common.h | 6 +++---
3 files changed, 23 insertions(+), 18 deletions(-)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 77e2ee0e5c6e..00fef5aa08be 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -381,19 +381,19 @@ static unsigned int vfio_migratable_device_num(void)
return device_num;
}
-int vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp)
+bool vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp)
{
int ret;
if (multiple_devices_migration_blocker ||
vfio_migratable_device_num() <= 1) {
- return 0;
+ return true;
}
if (vbasedev->enable_migration == ON_OFF_AUTO_ON) {
error_setg(errp, "Migration is currently not supported with multiple "
"VFIO devices");
- return -EINVAL;
+ return false;
}
error_setg(&multiple_devices_migration_blocker,
@@ -405,7 +405,7 @@ int vfio_block_multiple_devices_migration(VFIODevice
*vbasedev, Error **errp)
multiple_devices_migration_blocker = NULL;
}
- return ret;
+ return !ret;
}
void vfio_unblock_multiple_devices_migration(void)
@@ -433,19 +433,19 @@ static bool vfio_viommu_preset(void)
return false;
}
-int vfio_block_giommu_migration(VFIODevice *vbasedev, Error **errp)
+bool vfio_block_giommu_migration(VFIODevice *vbasedev, Error **errp)
{
int ret;
if (giommu_migration_blocker ||
!vfio_viommu_preset()) {
- return 0;
+ return true;
}
if (vbasedev->enable_migration == ON_OFF_AUTO_ON) {
error_setg(errp,
"Migration is currently not supported with vIOMMU enabled");
- return -EINVAL;
+ return false;
}
error_setg(&giommu_migration_blocker,
@@ -456,7 +456,7 @@ int vfio_block_giommu_migration(VFIODevice *vbasedev, Error
**errp)
giommu_migration_blocker = NULL;
}
- return ret;
+ return !ret;
}
void vfio_migration_finalize(void)
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
index 1db7d52ab2c1..09fa4714a085 100644
--- a/hw/vfio/migration.c
+++ b/hw/vfio/migration.c
@@ -802,13 +802,13 @@ static int vfio_migration_init(VFIODevice *vbasedev)
return 0;
}
-static int vfio_block_migration(VFIODevice *vbasedev, Error *err, Error **errp)
+static bool vfio_block_migration(VFIODevice *vbasedev, Error *err, Error
**errp)
{
int ret;
if (vbasedev->enable_migration == ON_OFF_AUTO_ON) {
error_propagate(errp, err);
- return -EINVAL;
+ return false;
}
vbasedev->migration_blocker = error_copy(err);
@@ -820,7 +820,7 @@ static int vfio_block_migration(VFIODevice *vbasedev, Error
*err, Error **errp)
vbasedev->migration_blocker = NULL;
}
- return ret;
+ return !ret;
}
/* ---------------------------------------------------------------------- */
@@ -835,7 +835,12 @@ void vfio_reset_bytes_transferred(void)
bytes_transferred = 0;
}
-int vfio_migration_realize(VFIODevice *vbasedev, Error **errp)
+/*
+ * Return true when either migration initialized or blocker registered.
+ * Currently only return false when adding blocker fails which will
+ * de-register vfio device.
+ */
+bool vfio_migration_realize(VFIODevice *vbasedev, Error **errp)
{
Error *err = NULL;
int ret;
@@ -874,17 +879,17 @@ int vfio_migration_realize(VFIODevice *vbasedev, Error
**errp)
}
ret = vfio_block_multiple_devices_migration(vbasedev, errp);
- if (ret) {
+ if (!ret) {
return ret;
}
ret = vfio_block_giommu_migration(vbasedev, errp);
- if (ret) {
+ if (!ret) {
return ret;
}
trace_vfio_migration_realize(vbasedev->name);
- return 0;
+ return true;
}
void vfio_migration_exit(VFIODevice *vbasedev)
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 93429b9abba0..b3014ece2edf 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -225,9 +225,9 @@ typedef QLIST_HEAD(VFIOGroupList, VFIOGroup) VFIOGroupList;
extern VFIOGroupList vfio_group_list;
bool vfio_mig_active(void);
-int vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp);
+bool vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp);
void vfio_unblock_multiple_devices_migration(void);
-int vfio_block_giommu_migration(VFIODevice *vbasedev, Error **errp);
+bool vfio_block_giommu_migration(VFIODevice *vbasedev, Error **errp);
int64_t vfio_mig_bytes_transferred(void);
void vfio_reset_bytes_transferred(void);
@@ -252,7 +252,7 @@ int vfio_spapr_create_window(VFIOContainer *container,
int vfio_spapr_remove_window(VFIOContainer *container,
hwaddr offset_within_address_space);
-int vfio_migration_realize(VFIODevice *vbasedev, Error **errp);
+bool vfio_migration_realize(VFIODevice *vbasedev, Error **errp);
void vfio_migration_exit(VFIODevice *vbasedev);
void vfio_migration_finalize(void);
--
2.34.1