1 files changed, 226 insertions, 35 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 27c2176895d..b224bb43ff6 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -3,12 +3,13 @@
  *
  * Copyright (c) 2002-3 Patrick Mochel
  * Copyright (c) 2002-3 Open Source Development Labs
+ * Copyright (c) 2006 Greg Kroah-Hartman <gregkh@suse.de>
+ * Copyright (c) 2006 Novell, Inc.
  *
  * This file is released under the GPLv2
  *
  */
 
-#include <linux/config.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/init.h>
@@ -93,6 +94,8 @@ static void device_release(struct kobject * kobj)
 
         if (dev->release)
                 dev->release(dev);
+        else if (dev->class && dev->class->dev_release)
+                dev->class->dev_release(dev);
         else {
                 printk(KERN_ERR "Device '%s' does not have a release() function, "
                         "it is broken and must be fixed.\n",
@@ -150,17 +153,21 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
                                "MINOR=%u", MINOR(dev->devt));
         }
 
-        /* add bus name of physical device */
+        /* add bus name (same as SUBSYSTEM, deprecated) */
         if (dev->bus)
                 add_uevent_var(envp, num_envp, &i,
                                buffer, buffer_size, &length,
                                "PHYSDEVBUS=%s", dev->bus->name);
 
-        /* add driver name of physical device */
-        if (dev->driver)
+        /* add driver name (PHYSDEV* values are deprecated)*/
+        if (dev->driver) {
+                add_uevent_var(envp, num_envp, &i,
+                               buffer, buffer_size, &length,
+                               "DRIVER=%s", dev->driver->name);
                 add_uevent_var(envp, num_envp, &i,
                                buffer, buffer_size, &length,
                                "PHYSDEVDRIVER=%s", dev->driver->name);
+        }
 
         /* terminate, set to next free slot, shrink available space */
         envp[i] = NULL;
@@ -178,6 +185,15 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
                 }
         }
 
+        if (dev->class && dev->class->dev_uevent) {
+                /* have the class specific function add its stuff */
+                retval = dev->class->dev_uevent(dev, envp, num_envp, buffer, buffer_size);
+                        if (retval) {
+                                pr_debug("%s - dev_uevent() returned %d\n",
+                                         __FUNCTION__, retval);
+                }
+        }
+
         return retval;
 }
 
@@ -194,6 +210,72 @@ static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
         return count;
 }
 
+static int device_add_groups(struct device *dev)
+{
+        int i;
+        int error = 0;
+
+        if (dev->groups) {
+                for (i = 0; dev->groups[i]; i++) {
+                        error = sysfs_create_group(&dev->kobj, dev->groups[i]);
+                        if (error) {
+                                while (--i >= 0)
+                                        sysfs_remove_group(&dev->kobj, dev->groups[i]);
+                                goto out;
+                        }
+                }
+        }
+out:
+        return error;
+}
+
+static void device_remove_groups(struct device *dev)
+{
+        int i;
+        if (dev->groups) {
+                for (i = 0; dev->groups[i]; i++) {
+                        sysfs_remove_group(&dev->kobj, dev->groups[i]);
+                }
+        }
+}
+
+static int device_add_attrs(struct device *dev)
+{
+        struct class *class = dev->class;
+        int error = 0;
+        int i;
+
+        if (!class)
+                return 0;
+
+        if (class->dev_attrs) {
+                for (i = 0; attr_name(class->dev_attrs[i]); i++) {
+                        error = device_create_file(dev, &class->dev_attrs[i]);
+                        if (error)
+                                break;
+                }
+        }
+        if (error)
+                while (--i >= 0)
+                        device_remove_file(dev, &class->dev_attrs[i]);
+        return error;
+}
+
+static void device_remove_attrs(struct device *dev)
+{
+        struct class *class = dev->class;
+        int i;
+
+        if (!class)
+                return;
+
+        if (class->dev_attrs) {
+                for (i = 0; attr_name(class->dev_attrs[i]); i++)
+                        device_remove_file(dev, &class->dev_attrs[i]);
+        }
+}
+
+
 static ssize_t show_dev(struct device *dev, struct device_attribute *attr,
                         char *buf)
 {
@@ -237,6 +319,32 @@ void device_remove_file(struct device * dev, struct device_attribute * attr)
         }
 }
 
+/**
+ * device_create_bin_file - create sysfs binary attribute file for device.
+ * @dev: device.
+ * @attr: device binary attribute descriptor.
+ */
+int device_create_bin_file(struct device *dev, struct bin_attribute *attr)
+{
+        int error = -EINVAL;
+        if (dev)
+                error = sysfs_create_bin_file(&dev->kobj, attr);
+        return error;
+}
+EXPORT_SYMBOL_GPL(device_create_bin_file);
+
+/**
+ * device_remove_bin_file - remove sysfs binary attribute file
+ * @dev: device.
+ * @attr: device binary attribute descriptor.
+ */
+void device_remove_bin_file(struct device *dev, struct bin_attribute *attr)
+{
+        if (dev)
+                sysfs_remove_bin_file(&dev->kobj, attr);
+}
+EXPORT_SYMBOL_GPL(device_remove_bin_file);
+
 static void klist_children_get(struct klist_node *n)
 {
         struct device *dev = container_of(n, struct device, knode_parent);
@@ -290,12 +398,20 @@ int device_add(struct device *dev)
 {
         struct device *parent = NULL;
         char *class_name = NULL;
+        struct class_interface *class_intf;
         int error = -EINVAL;
 
         dev = get_device(dev);
         if (!dev || !strlen(dev->bus_id))
                 goto Error;
 
+        /* if this is a class device, and has no parent, create one */
+        if ((dev->class) && (dev->parent == NULL)) {
+                error = virtual_device_parent(dev);
+                if (error)
+                        goto Error;
+        }
+
         parent = get_device(dev->parent);
 
         pr_debug("DEV: registering device: ID = '%s'\n", dev->bus_id);
@@ -308,6 +424,10 @@ int device_add(struct device *dev)
         if ((error = kobject_add(&dev->kobj)))
                 goto Error;
 
+        /* notify platform of device entry */
+        if (platform_notify)
+                platform_notify(dev);
+
         dev->uevent_attr.attr.name = "uevent";
         dev->uevent_attr.attr.mode = S_IWUSR;
         if (dev->driver)
@@ -341,12 +461,17 @@ int device_add(struct device *dev)
                                   "subsystem");
                 sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj,
                                   dev->bus_id);
-
-                sysfs_create_link(&dev->kobj, &dev->parent->kobj, "device");
-                class_name = make_class_name(dev->class->name, &dev->kobj);
-                sysfs_create_link(&dev->parent->kobj, &dev->kobj, class_name);
+                if (parent) {
+                        sysfs_create_link(&dev->kobj, &dev->parent->kobj, "device");
+                        class_name = make_class_name(dev->class->name, &dev->kobj);
+                        sysfs_create_link(&dev->parent->kobj, &dev->kobj, class_name);
+                }
         }
 
+        if ((error = device_add_attrs(dev)))
+                goto AttrsError;
+        if ((error = device_add_groups(dev)))
+                goto GroupError;
         if ((error = device_pm_add(dev)))
                 goto PMError;
         if ((error = bus_add_device(dev)))
@@ -357,15 +482,16 @@ int device_add(struct device *dev)
                 klist_add_tail(&dev->knode_parent, &parent->klist_children);
 
         if (dev->class) {
-                /* tie the class to the device */
                 down(&dev->class->sem);
+                /* tie the class to the device */
                 list_add_tail(&dev->node, &dev->class->devices);
+
+                /* notify any interfaces that the device is here */
+                list_for_each_entry(class_intf, &dev->class->interfaces, node)
+                        if (class_intf->add_dev)
+                                class_intf->add_dev(dev, class_intf);
                 up(&dev->class->sem);
         }
-
-        /* notify platform of device entry */
-        if (platform_notify)
-                platform_notify(dev);
  Done:
         kfree(class_name);
         put_device(dev);
@@ -373,6 +499,10 @@ int device_add(struct device *dev)
  BusError:
         device_pm_remove(dev);
  PMError:
+        device_remove_groups(dev);
+ GroupError:
+        device_remove_attrs(dev);
+ AttrsError:
         if (dev->devt_attr) {
                 device_remove_file(dev, dev->devt_attr);
                 kfree(dev->devt_attr);
@@ -450,6 +580,7 @@ void device_del(struct device * dev)
 {
         struct device * parent = dev->parent;
         char *class_name = NULL;
+        struct class_interface *class_intf;
 
         if (parent)
                 klist_del(&dev->knode_parent);
@@ -459,14 +590,23 @@ void device_del(struct device * dev)
                 sysfs_remove_link(&dev->kobj, "subsystem");
                 sysfs_remove_link(&dev->class->subsys.kset.kobj, dev->bus_id);
                 class_name = make_class_name(dev->class->name, &dev->kobj);
-                sysfs_remove_link(&dev->kobj, "device");
-                sysfs_remove_link(&dev->parent->kobj, class_name);
+                if (parent) {
+                        sysfs_remove_link(&dev->kobj, "device");
+                        sysfs_remove_link(&dev->parent->kobj, class_name);
+                }
                 kfree(class_name);
                 down(&dev->class->sem);
+                /* notify any interfaces that the device is now gone */
+                list_for_each_entry(class_intf, &dev->class->interfaces, node)
+                        if (class_intf->remove_dev)
+                                class_intf->remove_dev(dev, class_intf);
+                /* remove the device from the class list */
                 list_del_init(&dev->node);
                 up(&dev->class->sem);
         }
         device_remove_file(dev, &dev->uevent_attr);
+        device_remove_groups(dev);
+        device_remove_attrs(dev);
 
         /* Notify the platform of the removal, in case they
          * need to do anything...
@@ -560,27 +700,27 @@ static void device_create_release(struct device *dev)
 
 /**
  * device_create - creates a device and registers it with sysfs
- * @cs: pointer to the struct class that this device should be registered to.
- * @parent: pointer to the parent struct device of this new device, if any.
- * @dev: the dev_t for the char device to be added.
- * @fmt: string for the class device's name
+ * @class: pointer to the struct class that this device should be registered to
+ * @parent: pointer to the parent struct device of this new device, if any
+ * @devt: the dev_t for the char device to be added
+ * @fmt: string for the device's name
+ *
+ * This function can be used by char device classes.  A struct device
+ * will be created in sysfs, registered to the specified class.
  *
- * This function can be used by char device classes.  A struct
- * device will be created in sysfs, registered to the specified
- * class.
  * A "dev" file will be created, showing the dev_t for the device, if
  * the dev_t is not 0,0.
- * If a pointer to a parent struct device is passed in, the newly
- * created struct device will be a child of that device in sysfs.  The
- * pointer to the struct device will be returned from the call.  Any
- * further sysfs files that might be required can be created using this
+ * If a pointer to a parent struct device is passed in, the newly created
+ * struct device will be a child of that device in sysfs.
+ * The pointer to the struct device will be returned from the call.
+ * Any further sysfs files that might be required can be created using this
  * pointer.
  *
  * Note: the struct class passed to this function must have previously
  * been created with a call to class_create().
  */
 struct device *device_create(struct class *class, struct device *parent,
-                             dev_t devt, char *fmt, ...)
+                             dev_t devt, const char *fmt, ...)
 {
         va_list args;
         struct device *dev = NULL;
@@ -588,10 +728,6 @@ struct device *device_create(struct class *class, struct device *parent,
 
         if (class == NULL || IS_ERR(class))
                 goto error;
-        if (parent == NULL) {
-                printk(KERN_WARNING "%s does not work yet for NULL parents\n", __FUNCTION__);
-                goto error;
-        }
 
         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
         if (!dev) {
@@ -621,11 +757,11 @@ EXPORT_SYMBOL_GPL(device_create);
 
 /**
  * device_destroy - removes a device that was created with device_create()
- * @class: the pointer to the struct class that this device was registered * with.
- * @dev: the dev_t of the device that was previously registered.
+ * @class: pointer to the struct class that this device was registered with
+ * @devt: the dev_t of the device that was previously registered
  *
- * This call unregisters and cleans up a class device that was created with a
- * call to class_device_create()
+ * This call unregisters and cleans up a device that was created with a
+ * call to device_create().
  */
 void device_destroy(struct class *class, dev_t devt)
 {
@@ -645,3 +781,58 @@ void device_destroy(struct class *class, dev_t devt)
                 device_unregister(dev);
 }
 EXPORT_SYMBOL_GPL(device_destroy);
+
+/**
+ * device_rename - renames a device
+ * @dev: the pointer to the struct device to be renamed
+ * @new_name: the new name of the device
+ */
+int device_rename(struct device *dev, char *new_name)
+{
+        char *old_class_name = NULL;
+        char *new_class_name = NULL;
+        char *old_symlink_name = NULL;
+        int error;
+
+        dev = get_device(dev);
+        if (!dev)
+                return -EINVAL;
+
+        pr_debug("DEVICE: renaming '%s' to '%s'\n", dev->bus_id, new_name);
+
+        if ((dev->class) && (dev->parent))
+                old_class_name = make_class_name(dev->class->name, &dev->kobj);
+
+        if (dev->class) {
+                old_symlink_name = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
+                if (!old_symlink_name)
+                        return -ENOMEM;
+                strlcpy(old_symlink_name, dev->bus_id, BUS_ID_SIZE);
+        }
+
+        strlcpy(dev->bus_id, new_name, BUS_ID_SIZE);
+
+        error = kobject_rename(&dev->kobj, new_name);
+
+        if (old_class_name) {
+                new_class_name = make_class_name(dev->class->name, &dev->kobj);
+                if (new_class_name) {
+                        sysfs_create_link(&dev->parent->kobj, &dev->kobj,
+                                          new_class_name);
+                        sysfs_remove_link(&dev->parent->kobj, old_class_name);
+                }
+        }
+        if (dev->class) {
+                sysfs_remove_link(&dev->class->subsys.kset.kobj,
+                                  old_symlink_name);
+                sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj,
+                                  dev->bus_id);
+        }
+        put_device(dev);
+
+        kfree(old_class_name);
+        kfree(new_class_name);
+        kfree(old_symlink_name);
+
+        return error;
+}