diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/block/dataplane/virtio-blk.c | 17 | ||||
| -rw-r--r-- | hw/block/virtio-blk.c | 32 |
2 files changed, 40 insertions, 9 deletions
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c index 2faed43..411becc 100644 --- a/hw/block/dataplane/virtio-blk.c +++ b/hw/block/dataplane/virtio-blk.c @@ -18,7 +18,6 @@ #include "qemu/error-report.h" #include "hw/virtio/dataplane/vring.h" #include "ioq.h" -#include "migration/migration.h" #include "block/block.h" #include "hw/virtio/virtio-blk.h" #include "virtio-blk.h" @@ -69,8 +68,6 @@ struct VirtIOBlockDataPlane { queue */ unsigned int num_reqs; - - Error *migration_blocker; }; /* Raise an interrupt to signal guest, if necessary */ @@ -418,6 +415,14 @@ bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk, return false; } + /* If dataplane is (re-)enabled while the guest is running there could be + * block jobs that can conflict. + */ + if (bdrv_in_use(blk->conf.bs)) { + error_report("cannot start dataplane thread while device is in use"); + return false; + } + fd = raw_get_aio_fd(blk->conf.bs); if (fd < 0) { error_report("drive is incompatible with x-data-plane, " @@ -433,10 +438,6 @@ bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk, /* Prevent block operations that conflict with data plane thread */ bdrv_set_in_use(blk->conf.bs, 1); - error_setg(&s->migration_blocker, - "x-data-plane does not support migration"); - migrate_add_blocker(s->migration_blocker); - *dataplane = s; return true; } @@ -448,8 +449,6 @@ void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s) } virtio_blk_data_plane_stop(s); - migrate_del_blocker(s->migration_blocker); - error_free(s->migration_blocker); bdrv_set_in_use(s->blk->conf.bs, 0); g_free(s); } diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index a786233..e2f55cc 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -19,6 +19,7 @@ #include "hw/virtio/virtio-blk.h" #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE # include "dataplane/virtio-blk.h" +# include "migration/migration.h" #endif #include "block/scsi.h" #ifdef __linux__ @@ -628,6 +629,34 @@ void virtio_blk_set_conf(DeviceState *dev, VirtIOBlkConf *blk) memcpy(&(s->blk), blk, sizeof(struct VirtIOBlkConf)); } +#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE +/* Disable dataplane thread during live migration since it does not + * update the dirty memory bitmap yet. + */ +static void virtio_blk_migration_state_changed(Notifier *notifier, void *data) +{ + VirtIOBlock *s = container_of(notifier, VirtIOBlock, + migration_state_notifier); + MigrationState *mig = data; + + if (migration_in_setup(mig)) { + if (!s->dataplane) { + return; + } + virtio_blk_data_plane_destroy(s->dataplane); + s->dataplane = NULL; + } else if (migration_has_finished(mig) || + migration_has_failed(mig)) { + if (s->dataplane) { + return; + } + bdrv_drain_all(); /* complete in-flight non-dataplane requests */ + virtio_blk_data_plane_create(VIRTIO_DEVICE(s), &s->blk, + &s->dataplane); + } +} +#endif /* CONFIG_VIRTIO_BLK_DATA_PLANE */ + static int virtio_blk_device_init(VirtIODevice *vdev) { DeviceState *qdev = DEVICE(vdev); @@ -664,6 +693,8 @@ static int virtio_blk_device_init(VirtIODevice *vdev) virtio_cleanup(vdev); return -1; } + s->migration_state_notifier.notify = virtio_blk_migration_state_changed; + add_migration_state_change_notifier(&s->migration_state_notifier); #endif s->change = qemu_add_vm_change_state_handler(virtio_blk_dma_restart_cb, s); @@ -683,6 +714,7 @@ static int virtio_blk_device_exit(DeviceState *dev) VirtIODevice *vdev = VIRTIO_DEVICE(dev); VirtIOBlock *s = VIRTIO_BLK(dev); #ifdef CONFIG_VIRTIO_BLK_DATA_PLANE + remove_migration_state_change_notifier(&s->migration_state_notifier); virtio_blk_data_plane_destroy(s->dataplane); s->dataplane = NULL; #endif |