From: Alex Williamson <alex.williamson@redhat.com> mainline inclusion from mainline-5.3 commit 1e4d09d2212d9e230b967f57bc8df463527dbd75 category: feature bugzilla: NA CVE: NA ------------------------------------------------- This allows udev to trigger rules when a parent device is registered or unregistered from mdev. Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Xiaoyang Xu <xuxiaoyang2@huawei.com> Reviewed-by: Yingtai Xie <xieyingtai@huawei.com> Reviewed-by: Hanjun Guo <guohanjun@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/vfio/mdev/mdev_core.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index c4a4659..b768a6f 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -147,6 +147,8 @@ int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops) { int ret; struct mdev_parent *parent; + char *env_string = "MDEV_STATE=registered"; + char *envp[] = { env_string, NULL }; /* check for mandatory ops */ if (!ops || !ops->create || !ops->remove || !ops->supported_type_groups) @@ -198,6 +200,8 @@ int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops) mutex_unlock(&parent_list_lock); dev_info(dev, "MDEV: Registered\n"); + kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); + return 0; add_dev_err: @@ -221,6 +225,8 @@ int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops) void mdev_unregister_device(struct device *dev) { struct mdev_parent *parent; + char *env_string = "MDEV_STATE=unregistered"; + char *envp[] = { env_string, NULL }; mutex_lock(&parent_list_lock); parent = __find_parent_device(dev); @@ -244,6 +250,9 @@ void mdev_unregister_device(struct device *dev) up_write(&parent->unreg_sem); mdev_put_parent(parent); + + /* We still have the caller's reference to use for the uevent */ + kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); } EXPORT_SYMBOL(mdev_unregister_device); -- 1.8.3