On 21.07.23 17:18, Eugenio Perez Martin wrote:
On Wed, Jul 12, 2023 at 1:17 PM Hanna Czenczek <hre...@redhat.com> wrote:
vhost_save_backend_state() and vhost_load_backend_state() can be used by
vhost front-ends to easily save and load the back-end's state to/from
the migration stream.
Because we do not know the full state size ahead of time,
vhost_save_backend_state() simply reads the data in 1 MB chunks, and
writes each chunk consecutively into the migration stream, prefixed by
its length. EOF is indicated by a 0-length chunk.
Signed-off-by: Hanna Czenczek <hre...@redhat.com>
---
include/hw/virtio/vhost.h | 35 +++++++
hw/virtio/vhost.c | 204 ++++++++++++++++++++++++++++++++++++++
2 files changed, 239 insertions(+)
[...]
+int vhost_load_backend_state(struct vhost_dev *dev, QEMUFile *f, Error **errp)
+{
+ size_t transfer_buf_size = 0;
+ void *transfer_buf = NULL;
+ g_autoptr(GError) g_err = NULL;
+ int pipe_fds[2], read_fd = -1, write_fd = -1, reply_fd = -1;
+ int ret;
[...]
+ ret = 0;
+fail:
+ g_free(transfer_buf);
Nitpick, but transfer_buf could have the g_autofree parameter.
Ah, sure, thanks!
Hanna
