alias: use a callback for managing device presence state, track alias deps in a separ...

diff --git a/alias.c b/alias.c
index 338ece6695dfbdc8fadc7ff1564167b210a3c073..07ed5fea1d15cccd0236428c457c72b51829ce7e 100644 (file)
--- a/alias.c
+++ b/alias.c
@@ -48,6 +48,24 @@ alias_device_set_state(struct device *dev, bool state)
        return 0;
 }
 
+static void alias_device_cb(struct device_user *dep, enum device_event ev)
+{
+       struct alias_device *alias;
+       bool present = false;
+
+       alias = container_of(dep, struct alias_device, dep);
+       switch (ev) {
+       case DEV_EVENT_ADD:
+               present = true;
+       case DEV_EVENT_REMOVE:
+               device_set_present(&alias->dev, present);
+               break;
+       default:
+               device_broadcast_event(&alias->dev, ev);
+               break;
+       }
+}
+
 static struct device *
 alias_device_create(const char *name, struct blob_attr *attr)
 {
@@ -60,6 +78,8 @@ alias_device_create(const char *name, struct blob_attr *attr)
        device_init_virtual(&alias->dev, &alias_device_type, NULL);
        alias->avl.key = alias->name;
        avl_insert(&aliases, &alias->avl);
+       alias->dep.alias = true;
+       alias->dep.cb = alias_device_cb;
 
        return &alias->dev;
 }
@@ -101,8 +121,6 @@ alias_notify_device(const char *name, struct device *dev)
                }
        }
 
-       device_set_present(&alias->dev, !!dev);
-
        if (!dev && alias->dep.dev && !alias->dep.dev->active) {
                device_remove_user(&alias->dep);
                alias->dev.hidden = true;

diff --git a/device.c b/device.c
index 34ad9adb1603c19558d02851b4064a8fcec72d2e..80881d29edd4a47e1c90bfff4da363586538de14 100644 (file)
--- a/device.c
+++ b/device.c
@@ -180,11 +180,12 @@ static void __init dev_init(void)
        avl_init(&devices, avl_strcmp, true, NULL);
 }
 
-void device_broadcast_event(struct device *dev, enum device_event ev)
+
+static void __device_broadcast_event(struct list_head *head, enum device_event ev)
 {
        struct device_user *dep, *tmp;
 
-       list_for_each_entry_safe(dep, tmp, &dev->users, list) {
+       list_for_each_entry_safe(dep, tmp, head, list) {
                if (!dep->cb)
                        continue;
 
@@ -192,6 +193,12 @@ void device_broadcast_event(struct device *dev, enum device_event ev)
        }
 }
 
+void device_broadcast_event(struct device *dev, enum device_event ev)
+{
+       __device_broadcast_event(&dev->aliases, ev);
+       __device_broadcast_event(&dev->users, ev);
+}
+
 int device_claim(struct device_user *dep)
 {
        struct device *dev = dep->dev;
@@ -257,6 +264,7 @@ void device_init_virtual(struct device *dev, const struct device_type *type, con
 
        D(DEVICE, "Initialize device '%s'\n", dev->ifname);
        INIT_LIST_HEAD(&dev->users);
+       INIT_LIST_HEAD(&dev->aliases);
        dev->type = type;
 
        if (!dev->set_state)
@@ -378,6 +386,8 @@ void device_set_present(struct device *dev, bool state)
 
 void device_add_user(struct device_user *dep, struct device *dev)
 {
+       struct list_head *head;
+
        if (dep->dev)
                device_remove_user(dep);
 
@@ -385,7 +395,13 @@ void device_add_user(struct device_user *dep, struct device *dev)
                return;
 
        dep->dev = dev;
-       list_add_tail(&dep->list, &dev->users);
+
+       if (dep->alias)
+               head = &dev->aliases;
+       else
+               head = &dev->users;
+       list_add_tail(&dep->list, head);
+
        if (dep->cb && dev->present) {
                dep->cb(dep, DEV_EVENT_ADD);
                if (dev->active)

diff --git a/device.h b/device.h
index 88a421f45df4373c243112bbe9fc5aedc75b961c..8cedfbae642827b1ff5f650c34cb4dfddb8e4034 100644 (file)
--- a/device.h
+++ b/device.h
@@ -85,6 +85,7 @@ struct device_user {
 
        bool claimed;
        bool hotplug;
+       bool alias;
 
        struct device *dev;
        void (*cb)(struct device_user *, enum device_event);
@@ -106,6 +107,7 @@ struct device {
 
        struct avl_node avl;
        struct list_head users;
+       struct list_head aliases;
 
        char ifname[IFNAMSIZ + 1];
        int ifindex;