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vfio/mlx5: Fix the report of dirty_bytes upon pre-copy 

Fix the report of dirty_bytes upon pre-copy to include both the existing
data on the migration file and the device extra bytes.

This gives a better close estimation to what can be passed any more as
part of pre-copy.

Fixes: 0dce165b1a ("vfio/mlx5: Introduce vfio precopy ioctl implementation")
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20230308155723.108218-1-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Yishai Hadas 2023-03-08 17:57:23 +02:00 committed by Alex Williamson
parent eeac8ede17
commit 4928f67bc9
1 changed files with 4 additions and 10 deletions
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14
drivers/vfio/pci/mlx5/main.c
View File

@ -442,16 +442,10 @@ static long mlx5vf_precopy_ioctl(struct file *filp, unsigned int cmd,
if (migf->pre_copy_initial_bytes > *pos) {
info.initial_bytes = migf->pre_copy_initial_bytes - *pos;
} else {
buf = mlx5vf_get_data_buff_from_pos(migf, *pos, &end_of_data);
if (buf) {
info.dirty_bytes = buf->start_pos + buf->length - *pos;
} else {
if (!end_of_data) {
ret = -EINVAL;
goto err_migf_unlock;
}
info.dirty_bytes = inc_length;
}
info.dirty_bytes = migf->max_pos - *pos;
if (!info.dirty_bytes)
end_of_data = true;
info.dirty_bytes += inc_length;
}
if (!end_of_data || !inc_length) {