- * @signal: signal name
- * @obj: object path (kobject)
- * @envp: possible hotplug environment to pass with the message
- * @gfp_mask:
- */
-static int send_uevent(const char *signal, const char *obj,
- char **envp, int gfp_mask)
-{
- struct sk_buff *skb;
- char *pos;
- int len;
-
- if (!uevent_sock)
- return -EIO;
-
- len = strlen(signal) + 1;
- len += strlen(obj) + 1;
-
- /* allocate buffer with the maximum possible message size */
- skb = alloc_skb(len + BUFFER_SIZE, gfp_mask);
- if (!skb)
- return -ENOMEM;
-
- pos = skb_put(skb, len);
- sprintf(pos, "%s@%s", signal, obj);
-
- /* copy the environment key by key to our continuous buffer */
- if (envp) {
- int i;
-
- for (i = 2; envp[i]; i++) {
- len = strlen(envp[i]) + 1;
- pos = skb_put(skb, len);
- strcpy(pos, envp[i]);
- }
- }
-
- return netlink_broadcast(uevent_sock, skb, 0, 1, gfp_mask);
-}
-
-static int do_kobject_uevent(struct kobject *kobj, enum kobject_action action,
- struct attribute *attr, int gfp_mask)
-{
- char *path;
- char *attrpath;
- char *signal;
- int len;
- int rc = -ENOMEM;
-
- path = kobject_get_path(kobj, gfp_mask);
- if (!path)
- return -ENOMEM;
-
- signal = action_to_string(action);
- if (!signal)
- return -EINVAL;
-
- if (attr) {
- len = strlen(path);
- len += strlen(attr->name) + 2;
- attrpath = kmalloc(len, gfp_mask);
- if (!attrpath)
- goto exit;
- sprintf(attrpath, "%s/%s", path, attr->name);
- rc = send_uevent(signal, attrpath, NULL, gfp_mask);
- kfree(attrpath);
- } else
- rc = send_uevent(signal, path, NULL, gfp_mask);
-
-exit:
- kfree(path);
- return rc;
-}
-
-/**
- * kobject_uevent - notify userspace by sending event through netlink socket
- *
- * @signal: signal name
- * @kobj: struct kobject that the event is happening to
- * @attr: optional struct attribute the event belongs to