Add two tracepoints for both precopy and stopcopy query ioctls. When at it, add one warn_report_once() for each of them when it fails.
Signed-off-by: Peter Xu <[email protected]> --- hw/vfio/migration.c | 33 +++++++++++++++++++++++---------- hw/vfio/trace-events | 2 ++ 2 files changed, 25 insertions(+), 10 deletions(-) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index e6e6a0d53d..04d9f94edb 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -329,6 +329,7 @@ static int vfio_query_stop_copy_size(VFIODevice *vbasedev) struct vfio_device_feature_mig_data_size *mig_data_size = (struct vfio_device_feature_mig_data_size *)feature->data; VFIOMigration *migration = vbasedev->migration; + int ret; feature->argsz = sizeof(buf); feature->flags = @@ -340,12 +341,18 @@ static int vfio_query_stop_copy_size(VFIODevice *vbasedev) * is reported so downtime limit won't be violated. */ migration->stopcopy_size = VFIO_MIG_STOP_COPY_SIZE; - return -errno; + ret = -errno; + warn_report_once("VFIO device %s ioctl(VFIO_DEVICE_FEATURE) on " + "VFIO_DEVICE_FEATURE_MIG_DATA_SIZE failed (%d)", + vbasedev->name, ret); + } else { + migration->stopcopy_size = mig_data_size->stop_copy_length; + ret = 0; } - migration->stopcopy_size = mig_data_size->stop_copy_length; + trace_vfio_query_stop_copy_size(migration->stopcopy_size, ret); - return 0; + return ret; } static int vfio_query_precopy_size(VFIOMigration *migration) @@ -353,18 +360,24 @@ static int vfio_query_precopy_size(VFIOMigration *migration) struct vfio_precopy_info precopy = { .argsz = sizeof(precopy), }; - - migration->precopy_init_size = 0; - migration->precopy_dirty_size = 0; + int ret; if (ioctl(migration->data_fd, VFIO_MIG_GET_PRECOPY_INFO, &precopy)) { - return -errno; + migration->precopy_init_size = 0; + migration->precopy_dirty_size = 0; + ret = -errno; + warn_report_once("VFIO device %s ioctl(VFIO_MIG_GET_PRECOPY_INFO) " + "failed (%d)", migration->vbasedev->name, ret); + } else { + migration->precopy_init_size = precopy.initial_bytes; + migration->precopy_dirty_size = precopy.dirty_bytes; + ret = 0; } - migration->precopy_init_size = precopy.initial_bytes; - migration->precopy_dirty_size = precopy.dirty_bytes; + trace_vfio_query_precopy_size(migration->precopy_init_size, + migration->precopy_dirty_size, ret); - return 0; + return ret; } /* Returns the size of saved data on success and -errno on error */ diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index 287df0b8cb..854a7e4b19 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -176,6 +176,8 @@ vfio_save_setup(const char *name, uint64_t data_buffer_size) " (%s) data buffer vfio_state_pending(const char *name, uint64_t stopcopy_size, uint64_t precopy_init_size, uint64_t precopy_dirty_size, bool exact) " (%s) stopcopy size %"PRIu64" precopy initial size %"PRIu64" precopy dirty size %"PRIu64 " exact %d" vfio_vmstate_change(const char *name, int running, const char *reason, const char *dev_state) " (%s) running %d reason %s device state %s" vfio_vmstate_change_prepare(const char *name, int running, const char *reason, const char *dev_state) " (%s) running %d reason %s device state %s" +vfio_query_stop_copy_size(uint64_t size, int ret) "stopcopy size %"PRIu64" ret %d" +vfio_query_precopy_size(uint64_t init_size, uint64_t dirty_size, int ret) "init %"PRIu64" dirty %"PRIu64" ret %d" #iommufd.c -- 2.53.0
